diff options
| author | Hante Meuleman <meuleman@broadcom.com> | 2014-10-28 16:56:17 +0300 |
|---|---|---|
| committer | John W. Linville <linville@tuxdriver.com> | 2014-10-30 22:26:47 +0300 |
| commit | 888bf76e41119bf72256830bce0eb192a6a4033a (patch) | |
| tree | 3adf1e098b0d722ff65383e09f1f9c5da0ab741e /drivers/net/wireless/brcm80211/brcmfmac/dhd_sdio.c | |
| parent | bfe8197582f369dea55e1ef431a51d0b227704c8 (diff) | |
| download | linux-888bf76e41119bf72256830bce0eb192a6a4033a.tar.xz | |
brcmfmac: (clean) Rename sdio related files.
Rename sdio_host.h to sdio.h and dhd_sdio.c to sdio.c.
Reviewed-by: Arend Van Spriel <arend@broadcom.com>
Reviewed-by: Pieter-Paul Giesberts <pieterpg@broadcom.com>
Signed-off-by: Hante Meuleman <meuleman@broadcom.com>
Signed-off-by: Arend van Spriel <arend@broadcom.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
Diffstat (limited to 'drivers/net/wireless/brcm80211/brcmfmac/dhd_sdio.c')
| -rw-r--r-- | drivers/net/wireless/brcm80211/brcmfmac/dhd_sdio.c | 4276 |
1 files changed, 0 insertions, 4276 deletions
diff --git a/drivers/net/wireless/brcm80211/brcmfmac/dhd_sdio.c b/drivers/net/wireless/brcm80211/brcmfmac/dhd_sdio.c deleted file mode 100644 index 224e922d139a..000000000000 --- a/drivers/net/wireless/brcm80211/brcmfmac/dhd_sdio.c +++ /dev/null @@ -1,4276 +0,0 @@ -/* - * Copyright (c) 2010 Broadcom Corporation - * - * Permission to use, copy, modify, and/or distribute this software for any - * purpose with or without fee is hereby granted, provided that the above - * copyright notice and this permission notice appear in all copies. - * - * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES - * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF - * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY - * SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES - * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION - * OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN - * CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. - */ - -#include <linux/types.h> -#include <linux/kernel.h> -#include <linux/kthread.h> -#include <linux/printk.h> -#include <linux/pci_ids.h> -#include <linux/netdevice.h> -#include <linux/interrupt.h> -#include <linux/sched.h> -#include <linux/mmc/sdio.h> -#include <linux/mmc/sdio_ids.h> -#include <linux/mmc/sdio_func.h> -#include <linux/mmc/card.h> -#include <linux/semaphore.h> -#include <linux/firmware.h> -#include <linux/module.h> -#include <linux/bcma/bcma.h> -#include <linux/debugfs.h> -#include <linux/vmalloc.h> -#include <linux/platform_data/brcmfmac-sdio.h> -#include <linux/moduleparam.h> -#include <asm/unaligned.h> -#include <defs.h> -#include <brcmu_wifi.h> -#include <brcmu_utils.h> -#include <brcm_hw_ids.h> -#include <soc.h> -#include "sdio_host.h" -#include "chip.h" -#include "firmware.h" - -#define DCMD_RESP_TIMEOUT 2000 /* In milli second */ - -#ifdef DEBUG - -#define BRCMF_TRAP_INFO_SIZE 80 - -#define CBUF_LEN (128) - -/* Device console log buffer state */ -#define CONSOLE_BUFFER_MAX 2024 - -struct rte_log_le { - __le32 buf; /* Can't be pointer on (64-bit) hosts */ - __le32 buf_size; - __le32 idx; - char *_buf_compat; /* Redundant pointer for backward compat. */ -}; - -struct rte_console { - /* Virtual UART - * When there is no UART (e.g. Quickturn), - * the host should write a complete - * input line directly into cbuf and then write - * the length into vcons_in. - * This may also be used when there is a real UART - * (at risk of conflicting with - * the real UART). vcons_out is currently unused. - */ - uint vcons_in; - uint vcons_out; - - /* Output (logging) buffer - * Console output is written to a ring buffer log_buf at index log_idx. - * The host may read the output when it sees log_idx advance. - * Output will be lost if the output wraps around faster than the host - * polls. - */ - struct rte_log_le log_le; - - /* Console input line buffer - * Characters are read one at a time into cbuf - * until <CR> is received, then - * the buffer is processed as a command line. - * Also used for virtual UART. - */ - uint cbuf_idx; - char cbuf[CBUF_LEN]; -}; - -#endif /* DEBUG */ -#include <chipcommon.h> - -#include "bus.h" -#include "debug.h" -#include "tracepoint.h" - -#define TXQLEN 2048 /* bulk tx queue length */ -#define TXHI (TXQLEN - 256) /* turn on flow control above TXHI */ -#define TXLOW (TXHI - 256) /* turn off flow control below TXLOW */ -#define PRIOMASK 7 - -#define TXRETRIES 2 /* # of retries for tx frames */ - -#define BRCMF_RXBOUND 50 /* Default for max rx frames in - one scheduling */ - -#define BRCMF_TXBOUND 20 /* Default for max tx frames in - one scheduling */ - -#define BRCMF_TXMINMAX 1 /* Max tx frames if rx still pending */ - -#define MEMBLOCK 2048 /* Block size used for downloading - of dongle image */ -#define MAX_DATA_BUF (32 * 1024) /* Must be large enough to hold - biggest possible glom */ - -#define BRCMF_FIRSTREAD (1 << 6) - - -/* SBSDIO_DEVICE_CTL */ - -/* 1: device will assert busy signal when receiving CMD53 */ -#define SBSDIO_DEVCTL_SETBUSY 0x01 -/* 1: assertion of sdio interrupt is synchronous to the sdio clock */ -#define SBSDIO_DEVCTL_SPI_INTR_SYNC 0x02 -/* 1: mask all interrupts to host except the chipActive (rev 8) */ -#define SBSDIO_DEVCTL_CA_INT_ONLY 0x04 -/* 1: isolate internal sdio signals, put external pads in tri-state; requires - * sdio bus power cycle to clear (rev 9) */ -#define SBSDIO_DEVCTL_PADS_ISO 0x08 -/* Force SD->SB reset mapping (rev 11) */ -#define SBSDIO_DEVCTL_SB_RST_CTL 0x30 -/* Determined by CoreControl bit */ -#define SBSDIO_DEVCTL_RST_CORECTL 0x00 -/* Force backplane reset */ -#define SBSDIO_DEVCTL_RST_BPRESET 0x10 -/* Force no backplane reset */ -#define SBSDIO_DEVCTL_RST_NOBPRESET 0x20 - -/* direct(mapped) cis space */ - -/* MAPPED common CIS address */ -#define SBSDIO_CIS_BASE_COMMON 0x1000 -/* maximum bytes in one CIS */ -#define SBSDIO_CIS_SIZE_LIMIT 0x200 -/* cis offset addr is < 17 bits */ -#define SBSDIO_CIS_OFT_ADDR_MASK 0x1FFFF - -/* manfid tuple length, include tuple, link bytes */ -#define SBSDIO_CIS_MANFID_TUPLE_LEN 6 - -#define CORE_BUS_REG(base, field) \ - (base + offsetof(struct sdpcmd_regs, field)) - -/* SDIO function 1 register CHIPCLKCSR */ -/* Force ALP request to backplane */ -#define SBSDIO_FORCE_ALP 0x01 -/* Force HT request to backplane */ -#define SBSDIO_FORCE_HT 0x02 -/* Force ILP request to backplane */ -#define SBSDIO_FORCE_ILP 0x04 -/* Make ALP ready (power up xtal) */ -#define SBSDIO_ALP_AVAIL_REQ 0x08 -/* Make HT ready (power up PLL) */ -#define SBSDIO_HT_AVAIL_REQ 0x10 -/* Squelch clock requests from HW */ -#define SBSDIO_FORCE_HW_CLKREQ_OFF 0x20 -/* Status: ALP is ready */ -#define SBSDIO_ALP_AVAIL 0x40 -/* Status: HT is ready */ -#define SBSDIO_HT_AVAIL 0x80 -#define SBSDIO_CSR_MASK 0x1F -#define SBSDIO_AVBITS (SBSDIO_HT_AVAIL | SBSDIO_ALP_AVAIL) -#define SBSDIO_ALPAV(regval) ((regval) & SBSDIO_AVBITS) -#define SBSDIO_HTAV(regval) (((regval) & SBSDIO_AVBITS) == SBSDIO_AVBITS) -#define SBSDIO_ALPONLY(regval) (SBSDIO_ALPAV(regval) && !SBSDIO_HTAV(regval)) -#define SBSDIO_CLKAV(regval, alponly) \ - (SBSDIO_ALPAV(regval) && (alponly ? 1 : SBSDIO_HTAV(regval))) - -/* intstatus */ -#define I_SMB_SW0 (1 << 0) /* To SB Mail S/W interrupt 0 */ -#define I_SMB_SW1 (1 << 1) /* To SB Mail S/W interrupt 1 */ -#define I_SMB_SW2 (1 << 2) /* To SB Mail S/W interrupt 2 */ -#define I_SMB_SW3 (1 << 3) /* To SB Mail S/W interrupt 3 */ -#define I_SMB_SW_MASK 0x0000000f /* To SB Mail S/W interrupts mask */ -#define I_SMB_SW_SHIFT 0 /* To SB Mail S/W interrupts shift */ -#define I_HMB_SW0 (1 << 4) /* To Host Mail S/W interrupt 0 */ -#define I_HMB_SW1 (1 << 5) /* To Host Mail S/W interrupt 1 */ -#define I_HMB_SW2 (1 << 6) /* To Host Mail S/W interrupt 2 */ -#define I_HMB_SW3 (1 << 7) /* To Host Mail S/W interrupt 3 */ -#define I_HMB_SW_MASK 0x000000f0 /* To Host Mail S/W interrupts mask */ -#define I_HMB_SW_SHIFT 4 /* To Host Mail S/W interrupts shift */ -#define I_WR_OOSYNC (1 << 8) /* Write Frame Out Of Sync */ -#define I_RD_OOSYNC (1 << 9) /* Read Frame Out Of Sync */ -#define I_PC (1 << 10) /* descriptor error */ -#define I_PD (1 << 11) /* data error */ -#define I_DE (1 << 12) /* Descriptor protocol Error */ -#define I_RU (1 << 13) /* Receive descriptor Underflow */ -#define I_RO (1 << 14) /* Receive fifo Overflow */ -#define I_XU (1 << 15) /* Transmit fifo Underflow */ -#define I_RI (1 << 16) /* Receive Interrupt */ -#define I_BUSPWR (1 << 17) /* SDIO Bus Power Change (rev 9) */ -#define I_XMTDATA_AVAIL (1 << 23) /* bits in fifo */ -#define I_XI (1 << 24) /* Transmit Interrupt */ -#define I_RF_TERM (1 << 25) /* Read Frame Terminate */ -#define I_WF_TERM (1 << 26) /* Write Frame Terminate */ -#define I_PCMCIA_XU (1 << 27) /* PCMCIA Transmit FIFO Underflow */ -#define I_SBINT (1 << 28) /* sbintstatus Interrupt */ -#define I_CHIPACTIVE (1 << 29) /* chip from doze to active state */ -#define I_SRESET (1 << 30) /* CCCR RES interrupt */ -#define I_IOE2 (1U << 31) /* CCCR IOE2 Bit Changed */ -#define I_ERRORS (I_PC | I_PD | I_DE | I_RU | I_RO | I_XU) -#define I_DMA (I_RI | I_XI | I_ERRORS) - -/* corecontrol */ -#define CC_CISRDY (1 << 0) /* CIS Ready */ -#define CC_BPRESEN (1 << 1) /* CCCR RES signal */ -#define CC_F2RDY (1 << 2) /* set CCCR IOR2 bit */ -#define CC_CLRPADSISO (1 << 3) /* clear SDIO pads isolation */ -#define CC_XMTDATAAVAIL_MODE (1 << 4) -#define CC_XMTDATAAVAIL_CTRL (1 << 5) - -/* SDA_FRAMECTRL */ -#define SFC_RF_TERM (1 << 0) /* Read Frame Terminate */ -#define SFC_WF_TERM (1 << 1) /* Write Frame Terminate */ -#define SFC_CRC4WOOS (1 << 2) /* CRC error for write out of sync */ -#define SFC_ABORTALL (1 << 3) /* Abort all in-progress frames */ - -/* - * Software allocation of To SB Mailbox resources - */ - -/* tosbmailbox bits corresponding to intstatus bits */ -#define SMB_NAK (1 << 0) /* Frame NAK */ -#define SMB_INT_ACK (1 << 1) /* Host Interrupt ACK */ -#define SMB_USE_OOB (1 << 2) /* Use OOB Wakeup */ -#define SMB_DEV_INT (1 << 3) /* Miscellaneous Interrupt */ - -/* tosbmailboxdata */ -#define SMB_DATA_VERSION_SHIFT 16 /* host protocol version */ - -/* - * Software allocation of To Host Mailbox resources - */ - -/* intstatus bits */ -#define I_HMB_FC_STATE I_HMB_SW0 /* Flow Control State */ -#define I_HMB_FC_CHANGE I_HMB_SW1 /* Flow Control State Changed */ -#define I_HMB_FRAME_IND I_HMB_SW2 /* Frame Indication */ -#define I_HMB_HOST_INT I_HMB_SW3 /* Miscellaneous Interrupt */ - -/* tohostmailboxdata */ -#define HMB_DATA_NAKHANDLED 1 /* retransmit NAK'd frame */ -#define HMB_DATA_DEVREADY 2 /* talk to host after enable */ -#define HMB_DATA_FC 4 /* per prio flowcontrol update flag */ -#define HMB_DATA_FWREADY 8 /* fw ready for protocol activity */ - -#define HMB_DATA_FCDATA_MASK 0xff000000 -#define HMB_DATA_FCDATA_SHIFT 24 - -#define HMB_DATA_VERSION_MASK 0x00ff0000 -#define HMB_DATA_VERSION_SHIFT 16 - -/* - * Software-defined protocol header - */ - -/* Current protocol version */ -#define SDPCM_PROT_VERSION 4 - -/* - * Shared structure between dongle and the host. - * The structure contains pointers to trap or assert information. - */ -#define SDPCM_SHARED_VERSION 0x0003 -#define SDPCM_SHARED_VERSION_MASK 0x00FF -#define SDPCM_SHARED_ASSERT_BUILT 0x0100 -#define SDPCM_SHARED_ASSERT 0x0200 -#define SDPCM_SHARED_TRAP 0x0400 - -/* Space for header read, limit for data packets */ -#define MAX_HDR_READ (1 << 6) -#define MAX_RX_DATASZ 2048 - -/* Bump up limit on waiting for HT to account for first startup; - * if the image is doing a CRC calculation before programming the PMU - * for HT availability, it could take a couple hundred ms more, so - * max out at a 1 second (1000000us). - */ -#undef PMU_MAX_TRANSITION_DLY -#define PMU_MAX_TRANSITION_DLY 1000000 - -/* Value for ChipClockCSR during initial setup */ -#define BRCMF_INIT_CLKCTL1 (SBSDIO_FORCE_HW_CLKREQ_OFF | \ - SBSDIO_ALP_AVAIL_REQ) - -/* Flags for SDH calls */ -#define F2SYNC (SDIO_REQ_4BYTE | SDIO_REQ_FIXED) - -#define BRCMF_IDLE_ACTIVE 0 /* Do not request any SD clock change - * when idle - */ -#define BRCMF_IDLE_INTERVAL 1 - -#define KSO_WAIT_US 50 -#define MAX_KSO_ATTEMPTS (PMU_MAX_TRANSITION_DLY/KSO_WAIT_US) - -/* - * Conversion of 802.1D priority to precedence level - */ -static uint prio2prec(u32 prio) -{ - return (prio == PRIO_8021D_NONE || prio == PRIO_8021D_BE) ? - (prio^2) : prio; -} - -#ifdef DEBUG -/* Device console log buffer state */ -struct brcmf_console { - uint count; /* Poll interval msec counter */ - uint log_addr; /* Log struct address (fixed) */ - struct rte_log_le log_le; /* Log struct (host copy) */ - uint bufsize; /* Size of log buffer */ - u8 *buf; /* Log buffer (host copy) */ - uint last; /* Last buffer read index */ -}; - -struct brcmf_trap_info { - __le32 type; - __le32 epc; - __le32 cpsr; - __le32 spsr; - __le32 r0; /* a1 */ - __le32 r1; /* a2 */ - __le32 r2; /* a3 */ - __le32 r3; /* a4 */ - __le32 r4; /* v1 */ - __le32 r5; /* v2 */ - __le32 r6; /* v3 */ - __le32 r7; /* v4 */ - __le32 r8; /* v5 */ - __le32 r9; /* sb/v6 */ - __le32 r10; /* sl/v7 */ - __le32 r11; /* fp/v8 */ - __le32 r12; /* ip */ - __le32 r13; /* sp */ - __le32 r14; /* lr */ - __le32 pc; /* r15 */ -}; -#endif /* DEBUG */ - -struct sdpcm_shared { - u32 flags; - u32 trap_addr; - u32 assert_exp_addr; - u32 assert_file_addr; - u32 assert_line; - u32 console_addr; /* Address of struct rte_console */ - u32 msgtrace_addr; - u8 tag[32]; - u32 brpt_addr; -}; - -struct sdpcm_shared_le { - __le32 flags; - __le32 trap_addr; - __le32 assert_exp_addr; - __le32 assert_file_addr; - __le32 assert_line; - __le32 console_addr; /* Address of struct rte_console */ - __le32 msgtrace_addr; - u8 tag[32]; - __le32 brpt_addr; -}; - -/* dongle SDIO bus specific header info */ -struct brcmf_sdio_hdrinfo { - u8 seq_num; - u8 channel; - u16 len; - u16 len_left; - u16 len_nxtfrm; - u8 dat_offset; - bool lastfrm; - u16 tail_pad; -}; - -/* - * hold counter variables - */ -struct brcmf_sdio_count { - uint intrcount; /* Count of device interrupt callbacks */ - uint lastintrs; /* Count as of last watchdog timer */ - uint pollcnt; /* Count of active polls */ - uint regfails; /* Count of R_REG failures */ - uint tx_sderrs; /* Count of tx attempts with sd errors */ - uint fcqueued; /* Tx packets that got queued */ - uint rxrtx; /* Count of rtx requests (NAK to dongle) */ - uint rx_toolong; /* Receive frames too long to receive */ - uint rxc_errors; /* SDIO errors when reading control frames */ - uint rx_hdrfail; /* SDIO errors on header reads */ - uint rx_badhdr; /* Bad received headers (roosync?) */ - uint rx_badseq; /* Mismatched rx sequence number */ - uint fc_rcvd; /* Number of flow-control events received */ - uint fc_xoff; /* Number which turned on flow-control */ - uint fc_xon; /* Number which turned off flow-control */ - uint rxglomfail; /* Failed deglom attempts */ - uint rxglomframes; /* Number of glom frames (superframes) */ - uint rxglompkts; /* Number of packets from glom frames */ - uint f2rxhdrs; /* Number of header reads */ - uint f2rxdata; /* Number of frame data reads */ - uint f2txdata; /* Number of f2 frame writes */ - uint f1regdata; /* Number of f1 register accesses */ - uint tickcnt; /* Number of watchdog been schedule */ - ulong tx_ctlerrs; /* Err of sending ctrl frames */ - ulong tx_ctlpkts; /* Ctrl frames sent to dongle */ - ulong rx_ctlerrs; /* Err of processing rx ctrl frames */ - ulong rx_ctlpkts; /* Ctrl frames processed from dongle */ - ulong rx_readahead_cnt; /* packets where header read-ahead was used */ -}; - -/* misc chip info needed by some of the routines */ -/* Private data for SDIO bus interaction */ -struct brcmf_sdio { - struct brcmf_sdio_dev *sdiodev; /* sdio device handler */ - struct brcmf_chip *ci; /* Chip info struct */ - - u32 ramsize; /* Size of RAM in SOCRAM (bytes) */ - - u32 hostintmask; /* Copy of Host Interrupt Mask */ - atomic_t intstatus; /* Intstatus bits (events) pending */ - atomic_t fcstate; /* State of dongle flow-control */ - - uint blocksize; /* Block size of SDIO transfers */ - uint roundup; /* Max roundup limit */ - - struct pktq txq; /* Queue length used for flow-control */ - u8 flowcontrol; /* per prio flow control bitmask */ - u8 tx_seq; /* Transmit sequence number (next) */ - u8 tx_max; /* Maximum transmit sequence allowed */ - - u8 *hdrbuf; /* buffer for handling rx frame */ - u8 *rxhdr; /* Header of current rx frame (in hdrbuf) */ - u8 rx_seq; /* Receive sequence number (expected) */ - struct brcmf_sdio_hdrinfo cur_read; - /* info of current read frame */ - bool rxskip; /* Skip receive (awaiting NAK ACK) */ - bool rxpending; /* Data frame pending in dongle */ - - uint rxbound; /* Rx frames to read before resched */ - uint txbound; /* Tx frames to send before resched */ - uint txminmax; - - struct sk_buff *glomd; /* Packet containing glomming descriptor */ - struct sk_buff_head glom; /* Packet list for glommed superframe */ - uint glomerr; /* Glom packet read errors */ - - u8 *rxbuf; /* Buffer for receiving control packets */ - uint rxblen; /* Allocated length of rxbuf */ - u8 *rxctl; /* Aligned pointer into rxbuf */ - u8 *rxctl_orig; /* pointer for freeing rxctl */ - uint rxlen; /* Length of valid data in buffer */ - spinlock_t rxctl_lock; /* protection lock for ctrl frame resources */ - - u8 sdpcm_ver; /* Bus protocol reported by dongle */ - - bool intr; /* Use interrupts */ - bool poll; /* Use polling */ - atomic_t ipend; /* Device interrupt is pending */ - uint spurious; /* Count of spurious interrupts */ - uint pollrate; /* Ticks between device polls */ - uint polltick; /* Tick counter */ - -#ifdef DEBUG - uint console_interval; - struct brcmf_console console; /* Console output polling support */ - uint console_addr; /* Console address from shared struct */ -#endif /* DEBUG */ - - uint clkstate; /* State of sd and backplane clock(s) */ - bool activity; /* Activity flag for clock down */ - s32 idletime; /* Control for activity timeout */ - s32 idlecount; /* Activity timeout counter */ - s32 idleclock; /* How to set bus driver when idle */ - bool rxflow_mode; /* Rx flow control mode */ - bool rxflow; /* Is rx flow control on */ - bool alp_only; /* Don't use HT clock (ALP only) */ - - u8 *ctrl_frame_buf; - u16 ctrl_frame_len; - bool ctrl_frame_stat; - - spinlock_t txq_lock; /* protect bus->txq */ - struct semaphore tx_seq_lock; /* protect bus->tx_seq */ - wait_queue_head_t ctrl_wait; - wait_queue_head_t dcmd_resp_wait; - - struct timer_list timer; - struct completion watchdog_wait; - struct task_struct *watchdog_tsk; - bool wd_timer_valid; - uint save_ms; - - struct workqueue_struct *brcmf_wq; - struct work_struct datawork; - atomic_t dpc_tskcnt; - - bool txoff; /* Transmit flow-controlled */ - struct brcmf_sdio_count sdcnt; - bool sr_enabled; /* SaveRestore enabled */ - bool sleeping; /* SDIO bus sleeping */ - - u8 tx_hdrlen; /* sdio bus header length for tx packet */ - bool txglom; /* host tx glomming enable flag */ - u16 head_align; /* buffer pointer alignment */ - u16 sgentry_align; /* scatter-gather buffer alignment */ -}; - -/* clkstate */ -#define CLK_NONE 0 -#define CLK_SDONLY 1 -#define CLK_PENDING 2 -#define CLK_AVAIL 3 - -#ifdef DEBUG -static int qcount[NUMPRIO]; -#endif /* DEBUG */ - -#define DEFAULT_SDIO_DRIVE_STRENGTH 6 /* in milliamps */ - -#define RETRYCHAN(chan) ((chan) == SDPCM_EVENT_CHANNEL) - -/* Retry count for register access failures */ -static const uint retry_limit = 2; - -/* Limit on rounding up frames */ -static const uint max_roundup = 512; - -#define ALIGNMENT 4 - -enum brcmf_sdio_frmtype { - BRCMF_SDIO_FT_NORMAL, - BRCMF_SDIO_FT_SUPER, - BRCMF_SDIO_FT_SUB, -}; - -#define SDIOD_DRVSTR_KEY(chip, pmu) (((chip) << 16) | (pmu)) - -/* SDIO Pad drive strength to select value mappings */ -struct sdiod_drive_str { - u8 strength; /* Pad Drive Strength in mA */ - u8 sel; /* Chip-specific select value */ -}; - -/* SDIO Drive Strength to sel value table for PMU Rev 11 (1.8V) */ -static const struct sdiod_drive_str sdiod_drvstr_tab1_1v8[] = { - {32, 0x6}, - {26, 0x7}, - {22, 0x4}, - {16, 0x5}, - {12, 0x2}, - {8, 0x3}, - {4, 0x0}, - {0, 0x1} -}; - -/* SDIO Drive Strength to sel value table for PMU Rev 13 (1.8v) */ -static const struct sdiod_drive_str sdiod_drive_strength_tab5_1v8[] = { - {6, 0x7}, - {5, 0x6}, - {4, 0x5}, - {3, 0x4}, - {2, 0x2}, - {1, 0x1}, - {0, 0x0} -}; - -/* SDIO Drive Strength to sel value table for PMU Rev 17 (1.8v) */ -static const struct sdiod_drive_str sdiod_drvstr_tab6_1v8[] = { - {3, 0x3}, - {2, 0x2}, - {1, 0x1}, - {0, 0x0} }; - -/* SDIO Drive Strength to sel value table for 43143 PMU Rev 17 (3.3V) */ -static const struct sdiod_drive_str sdiod_drvstr_tab2_3v3[] = { - {16, 0x7}, - {12, 0x5}, - {8, 0x3}, - {4, 0x1} -}; - -#define BCM43143_FIRMWARE_NAME "brcm/brcmfmac43143-sdio.bin" -#define BCM43143_NVRAM_NAME "brcm/brcmfmac43143-sdio.txt" -#define BCM43241B0_FIRMWARE_NAME "brcm/brcmfmac43241b0-sdio.bin" -#define BCM43241B0_NVRAM_NAME "brcm/brcmfmac43241b0-sdio.txt" -#define BCM43241B4_FIRMWARE_NAME "brcm/brcmfmac43241b4-sdio.bin" -#define BCM43241B4_NVRAM_NAME "brcm/brcmfmac43241b4-sdio.txt" -#define BCM4329_FIRMWARE_NAME "brcm/brcmfmac4329-sdio.bin" -#define BCM4329_NVRAM_NAME "brcm/brcmfmac4329-sdio.txt" -#define BCM4330_FIRMWARE_NAME "brcm/brcmfmac4330-sdio.bin" -#define BCM4330_NVRAM_NAME "brcm/brcmfmac4330-sdio.txt" -#define BCM4334_FIRMWARE_NAME "brcm/brcmfmac4334-sdio.bin" -#define BCM4334_NVRAM_NAME "brcm/brcmfmac4334-sdio.txt" -#define BCM4335_FIRMWARE_NAME "brcm/brcmfmac4335-sdio.bin" -#define BCM4335_NVRAM_NAME "brcm/brcmfmac4335-sdio.txt" -#define BCM43362_FIRMWARE_NAME "brcm/brcmfmac43362-sdio.bin" -#define BCM43362_NVRAM_NAME "brcm/brcmfmac43362-sdio.txt" -#define BCM4339_FIRMWARE_NAME "brcm/brcmfmac4339-sdio.bin" -#define BCM4339_NVRAM_NAME "brcm/brcmfmac4339-sdio.txt" -#define BCM4354_FIRMWARE_NAME "brcm/brcmfmac4354-sdio.bin" -#define BCM4354_NVRAM_NAME "brcm/brcmfmac4354-sdio.txt" - -MODULE_FIRMWARE(BCM43143_FIRMWARE_NAME); -MODULE_FIRMWARE(BCM43143_NVRAM_NAME); -MODULE_FIRMWARE(BCM43241B0_FIRMWARE_NAME); -MODULE_FIRMWARE(BCM43241B0_NVRAM_NAME); -MODULE_FIRMWARE(BCM43241B4_FIRMWARE_NAME); -MODULE_FIRMWARE(BCM43241B4_NVRAM_NAME); -MODULE_FIRMWARE(BCM4329_FIRMWARE_NAME); -MODULE_FIRMWARE(BCM4329_NVRAM_NAME); -MODULE_FIRMWARE(BCM4330_FIRMWARE_NAME); -MODULE_FIRMWARE(BCM4330_NVRAM_NAME); -MODULE_FIRMWARE(BCM4334_FIRMWARE_NAME); -MODULE_FIRMWARE(BCM4334_NVRAM_NAME); -MODULE_FIRMWARE(BCM4335_FIRMWARE_NAME); -MODULE_FIRMWARE(BCM4335_NVRAM_NAME); -MODULE_FIRMWARE(BCM43362_FIRMWARE_NAME); -MODULE_FIRMWARE(BCM43362_NVRAM_NAME); -MODULE_FIRMWARE(BCM4339_FIRMWARE_NAME); -MODULE_FIRMWARE(BCM4339_NVRAM_NAME); -MODULE_FIRMWARE(BCM4354_FIRMWARE_NAME); -MODULE_FIRMWARE(BCM4354_NVRAM_NAME); - -struct brcmf_firmware_names { - u32 chipid; - u32 revmsk; - const char *bin; - const char *nv; -}; - -enum brcmf_firmware_type { - BRCMF_FIRMWARE_BIN, - BRCMF_FIRMWARE_NVRAM -}; - -#define BRCMF_FIRMWARE_NVRAM(name) \ - name ## _FIRMWARE_NAME, name ## _NVRAM_NAME - -static const struct brcmf_firmware_names brcmf_fwname_data[] = { - { BRCM_CC_43143_CHIP_ID, 0xFFFFFFFF, BRCMF_FIRMWARE_NVRAM(BCM43143) }, - { BRCM_CC_43241_CHIP_ID, 0x0000001F, BRCMF_FIRMWARE_NVRAM(BCM43241B0) }, - { BRCM_CC_43241_CHIP_ID, 0xFFFFFFE0, BRCMF_FIRMWARE_NVRAM(BCM43241B4) }, - { BRCM_CC_4329_CHIP_ID, 0xFFFFFFFF, BRCMF_FIRMWARE_NVRAM(BCM4329) }, - { BRCM_CC_4330_CHIP_ID, 0xFFFFFFFF, BRCMF_FIRMWARE_NVRAM(BCM4330) }, - { BRCM_CC_4334_CHIP_ID, 0xFFFFFFFF, BRCMF_FIRMWARE_NVRAM(BCM4334) }, - { BRCM_CC_4335_CHIP_ID, 0xFFFFFFFF, BRCMF_FIRMWARE_NVRAM(BCM4335) }, - { BRCM_CC_43362_CHIP_ID, 0xFFFFFFFE, BRCMF_FIRMWARE_NVRAM(BCM43362) }, - { BRCM_CC_4339_CHIP_ID, 0xFFFFFFFF, BRCMF_FIRMWARE_NVRAM(BCM4339) }, - { BRCM_CC_4354_CHIP_ID, 0xFFFFFFFF, BRCMF_FIRMWARE_NVRAM(BCM4354) } -}; - -static int brcmf_sdio_get_fwnames(struct brcmf_chip *ci, - struct brcmf_sdio_dev *sdiodev) -{ - int i; - uint fw_len, nv_len; - char end; - - for (i = 0; i < ARRAY_SIZE(brcmf_fwname_data); i++) { - if (brcmf_fwname_data[i].chipid == ci->chip && - brcmf_fwname_data[i].revmsk & BIT(ci->chiprev)) - break; - } - - if (i == ARRAY_SIZE(brcmf_fwname_data)) { - brcmf_err("Unknown chipid %d [%d]\n", ci->chip, ci->chiprev); - return -ENODEV; - } - - fw_len = sizeof(sdiodev->fw_name) - 1; - nv_len = sizeof(sdiodev->nvram_name) - 1; - /* check if firmware path is provided by module parameter */ - if (brcmf_firmware_path[0] != '\0') { - strncpy(sdiodev->fw_name, brcmf_firmware_path, fw_len); - strncpy(sdiodev->nvram_name, brcmf_firmware_path, nv_len); - fw_len -= strlen(sdiodev->fw_name); - nv_len -= strlen(sdiodev->nvram_name); - - end = brcmf_firmware_path[strlen(brcmf_firmware_path) - 1]; - if (end != '/') { - strncat(sdiodev->fw_name, "/", fw_len); - strncat(sdiodev->nvram_name, "/", nv_len); - fw_len--; - nv_len--; - } - } - strncat(sdiodev->fw_name, brcmf_fwname_data[i].bin, fw_len); - strncat(sdiodev->nvram_name, brcmf_fwname_data[i].nv, nv_len); - - return 0; -} - -static void pkt_align(struct sk_buff *p, int len, int align) -{ - uint datalign; - datalign = (unsigned long)(p->data); - datalign = roundup(datalign, (align)) - datalign; - if (datalign) - skb_pull(p, datalign); - __skb_trim(p, len); -} - -/* To check if there's window offered */ -static bool data_ok(struct brcmf_sdio *bus) -{ - return (u8)(bus->tx_max - bus->tx_seq) != 0 && - ((u8)(bus->tx_max - bus->tx_seq) & 0x80) == 0; -} - -/* - * Reads a register in the SDIO hardware block. This block occupies a series of - * adresses on the 32 bit backplane bus. - */ -static int r_sdreg32(struct brcmf_sdio *bus, u32 *regvar, u32 offset) -{ - struct brcmf_core *core; - int ret; - - core = brcmf_chip_get_core(bus->ci, BCMA_CORE_SDIO_DEV); - *regvar = brcmf_sdiod_regrl(bus->sdiodev, core->base + offset, &ret); - - return ret; -} - -static int w_sdreg32(struct brcmf_sdio *bus, u32 regval, u32 reg_offset) -{ - struct brcmf_core *core; - int ret; - - core = brcmf_chip_get_core(bus->ci, BCMA_CORE_SDIO_DEV); - brcmf_sdiod_regwl(bus->sdiodev, core->base + reg_offset, regval, &ret); - - return ret; -} - -static int -brcmf_sdio_kso_control(struct brcmf_sdio *bus, bool on) -{ - u8 wr_val = 0, rd_val, cmp_val, bmask; - int err = 0; - int try_cnt = 0; - - brcmf_dbg(TRACE, "Enter: on=%d\n", on); - - wr_val = (on << SBSDIO_FUNC1_SLEEPCSR_KSO_SHIFT); - /* 1st KSO write goes to AOS wake up core if device is asleep */ - brcmf_sdiod_regwb(bus->sdiodev, SBSDIO_FUNC1_SLEEPCSR, - wr_val, &err); - - if (on) { - /* device WAKEUP through KSO: - * write bit 0 & read back until - * both bits 0 (kso bit) & 1 (dev on status) are set - */ - cmp_val = SBSDIO_FUNC1_SLEEPCSR_KSO_MASK | - SBSDIO_FUNC1_SLEEPCSR_DEVON_MASK; - bmask = cmp_val; - usleep_range(2000, 3000); - } else { - /* Put device to sleep, turn off KSO */ - cmp_val = 0; - /* only check for bit0, bit1(dev on status) may not - * get cleared right away - */ - bmask = SBSDIO_FUNC1_SLEEPCSR_KSO_MASK; - } - - do { - /* reliable KSO bit set/clr: - * the sdiod sleep write access is synced to PMU 32khz clk - * just one write attempt may fail, - * read it back until it matches written value - */ - rd_val = brcmf_sdiod_regrb(bus->sdiodev, SBSDIO_FUNC1_SLEEPCSR, - &err); - if (((rd_val & bmask) == cmp_val) && !err) - break; - - udelay(KSO_WAIT_US); - brcmf_sdiod_regwb(bus->sdiodev, SBSDIO_FUNC1_SLEEPCSR, - wr_val, &err); - } while (try_cnt++ < MAX_KSO_ATTEMPTS); - - if (try_cnt > 2) - brcmf_dbg(SDIO, "try_cnt=%d rd_val=0x%x err=%d\n", try_cnt, - rd_val, err); - - if (try_cnt > MAX_KSO_ATTEMPTS) - brcmf_err("max tries: rd_val=0x%x err=%d\n", rd_val, err); - - return err; -} - -#define HOSTINTMASK (I_HMB_SW_MASK | I_CHIPACTIVE) - -/* Turn backplane clock on or off */ -static int brcmf_sdio_htclk(struct brcmf_sdio *bus, bool on, bool pendok) -{ - int err; - u8 clkctl, clkreq, devctl; - unsigned long timeout; - - brcmf_dbg(SDIO, "Enter\n"); - - clkctl = 0; - - if (bus->sr_enabled) { - bus->clkstate = (on ? CLK_AVAIL : CLK_SDONLY); - return 0; - } - - if (on) { - /* Request HT Avail */ - clkreq = - bus->alp_only ? SBSDIO_ALP_AVAIL_REQ : SBSDIO_HT_AVAIL_REQ; - - brcmf_sdiod_regwb(bus->sdiodev, SBSDIO_FUNC1_CHIPCLKCSR, - clkreq, &err); - if (err) { - brcmf_err("HT Avail request error: %d\n", err); - return -EBADE; - } - - /* Check current status */ - clkctl = brcmf_sdiod_regrb(bus->sdiodev, - SBSDIO_FUNC1_CHIPCLKCSR, &err); - if (err) { - brcmf_err("HT Avail read error: %d\n", err); - return -EBADE; - } - - /* Go to pending and await interrupt if appropriate */ - if (!SBSDIO_CLKAV(clkctl, bus->alp_only) && pendok) { - /* Allow only clock-available interrupt */ - devctl = brcmf_sdiod_regrb(bus->sdiodev, - SBSDIO_DEVICE_CTL, &err); - if (err) { - brcmf_err("Devctl error setting CA: %d\n", - err); - return -EBADE; - } - - devctl |= SBSDIO_DEVCTL_CA_INT_ONLY; - brcmf_sdiod_regwb(bus->sdiodev, SBSDIO_DEVICE_CTL, - devctl, &err); - brcmf_dbg(SDIO, "CLKCTL: set PENDING\n"); - bus->clkstate = CLK_PENDING; - - return 0; - } else if (bus->clkstate == CLK_PENDING) { - /* Cancel CA-only interrupt filter */ - devctl = brcmf_sdiod_regrb(bus->sdiodev, - SBSDIO_DEVICE_CTL, &err); - devctl &= ~SBSDIO_DEVCTL_CA_INT_ONLY; - brcmf_sdiod_regwb(bus->sdiodev, SBSDIO_DEVICE_CTL, - devctl, &err); - } - - /* Otherwise, wait here (polling) for HT Avail */ - timeout = jiffies + - msecs_to_jiffies(PMU_MAX_TRANSITION_DLY/1000); - while (!SBSDIO_CLKAV(clkctl, bus->alp_only)) { - clkctl = brcmf_sdiod_regrb(bus->sdiodev, - SBSDIO_FUNC1_CHIPCLKCSR, - &err); - if (time_after(jiffies, timeout)) - break; - else - usleep_range(5000, 10000); - } - if (err) { - brcmf_err("HT Avail request error: %d\n", err); - return -EBADE; - } - if (!SBSDIO_CLKAV(clkctl, bus->alp_only)) { - brcmf_err("HT Avail timeout (%d): clkctl 0x%02x\n", - PMU_MAX_TRANSITION_DLY, clkctl); - return -EBADE; - } - - /* Mark clock available */ - bus->clkstate = CLK_AVAIL; - brcmf_dbg(SDIO, "CLKCTL: turned ON\n"); - -#if defined(DEBUG) - if (!bus->alp_only) { - if (SBSDIO_ALPONLY(clkctl)) - brcmf_err("HT Clock should be on\n"); - } -#endif /* defined (DEBUG) */ - - } else { - clkreq = 0; - - if (bus->clkstate == CLK_PENDING) { - /* Cancel CA-only interrupt filter */ - devctl = brcmf_sdiod_regrb(bus->sdiodev, - SBSDIO_DEVICE_CTL, &err); - devctl &= ~SBSDIO_DEVCTL_CA_INT_ONLY; - brcmf_sdiod_regwb(bus->sdiodev, SBSDIO_DEVICE_CTL, - devctl, &err); - } - - bus->clkstate = CLK_SDONLY; - brcmf_sdiod_regwb(bus->sdiodev, SBSDIO_FUNC1_CHIPCLKCSR, - clkreq, &err); - brcmf_dbg(SDIO, "CLKCTL: turned OFF\n"); - if (err) { - brcmf_err("Failed access turning clock off: %d\n", - err); - return -EBADE; - } - } - return 0; -} - -/* Change idle/active SD state */ -static int brcmf_sdio_sdclk(struct brcmf_sdio *bus, bool on) -{ - brcmf_dbg(SDIO, "Enter\n"); - - if (on) - bus->clkstate = CLK_SDONLY; - else - bus->clkstate = CLK_NONE; - - return 0; -} - -/* Transition SD and backplane clock readiness */ -static int brcmf_sdio_clkctl(struct brcmf_sdio *bus, uint target, bool pendok) -{ -#ifdef DEBUG - uint oldstate = bus->clkstate; -#endif /* DEBUG */ - - brcmf_dbg(SDIO, "Enter\n"); - - /* Early exit if we're already there */ - if (bus->clkstate == target) { - if (target == CLK_AVAIL) { - brcmf_sdio_wd_timer(bus, BRCMF_WD_POLL_MS); - bus->activity = true; - } - return 0; - } - - switch (target) { - case CLK_AVAIL: - /* Make sure SD clock is available */ - if (bus->clkstate == CLK_NONE) - brcmf_sdio_sdclk(bus, true); - /* Now request HT Avail on the backplane */ - brcmf_sdio_htclk(bus, true, pendok); - brcmf_sdio_wd_timer(bus, BRCMF_WD_POLL_MS); - bus->activity = true; - break; - - case CLK_SDONLY: - /* Remove HT request, or bring up SD clock */ - if (bus->clkstate == CLK_NONE) - brcmf_sdio_sdclk(bus, true); - else if (bus->clkstate == CLK_AVAIL) - brcmf_sdio_htclk(bus, false, false); - else - brcmf_err("request for %d -> %d\n", - bus->clkstate, target); - brcmf_sdio_wd_timer(bus, BRCMF_WD_POLL_MS); - break; - - case CLK_NONE: - /* Make sure to remove HT request */ - if (bus->clkstate == CLK_AVAIL) - brcmf_sdio_htclk(bus, false, false); - /* Now remove the SD clock */ - brcmf_sdio_sdclk(bus, false); - brcmf_sdio_wd_timer(bus, 0); - break; - } -#ifdef DEBUG - brcmf_dbg(SDIO, "%d -> %d\n", oldstate, bus->clkstate); -#endif /* DEBUG */ - - return 0; -} - -static int -brcmf_sdio_bus_sleep(struct brcmf_sdio *bus, bool sleep, bool pendok) -{ - int err = 0; - u8 clkcsr; - - brcmf_dbg(SDIO, "Enter: request %s currently %s\n", - (sleep ? "SLEEP" : "WAKE"), - (bus->sleeping ? "SLEEP" : "WAKE")); - - /* If SR is enabled control bus state with KSO */ - if (bus->sr_enabled) { - /* Done if we're already in the requested state */ - if (sleep == bus->sleeping) - goto end; - - /* Going to sleep */ - if (sleep) { - /* Don't sleep if something is pending */ - if (atomic_read(&bus->intstatus) || - atomic_read(&bus->ipend) > 0 || - (!atomic_read(&bus->fcstate) && - brcmu_pktq_mlen(&bus->txq, ~bus->flowcontrol) && - data_ok(bus))) { - err = -EBUSY; - goto done; - } - - clkcsr = brcmf_sdiod_regrb(bus->sdiodev, - SBSDIO_FUNC1_CHIPCLKCSR, - &err); - if ((clkcsr & SBSDIO_CSR_MASK) == 0) { - brcmf_dbg(SDIO, "no clock, set ALP\n"); - brcmf_sdiod_regwb(bus->sdiodev, - SBSDIO_FUNC1_CHIPCLKCSR, - SBSDIO_ALP_AVAIL_REQ, &err); - } - err = brcmf_sdio_kso_control(bus, false); - /* disable watchdog */ - if (!err) - brcmf_sdio_wd_timer(bus, 0); - } else { - bus->idlecount = 0; - err = brcmf_sdio_kso_control(bus, true); - } - if (!err) { - /* Change state */ - bus->sleeping = sleep; - brcmf_dbg(SDIO, "new state %s\n", - (sleep ? "SLEEP" : "WAKE")); - } else { - brcmf_err("error while changing bus sleep state %d\n", - err); - goto done; - } - } - -end: - /* control clocks */ - if (sleep) { - if (!bus->sr_enabled) - brcmf_sdio_clkctl(bus, CLK_NONE, pendok); - } else { - brcmf_sdio_clkctl(bus, CLK_AVAIL, pendok); - } -done: - brcmf_dbg(SDIO, "Exit: err=%d\n", err); - return err; - -} - -#ifdef DEBUG -static inline bool brcmf_sdio_valid_shared_address(u32 addr) -{ - return !(addr == 0 || ((~addr >> 16) & 0xffff) == (addr & 0xffff)); -} - -static int brcmf_sdio_readshared(struct brcmf_sdio *bus, - struct sdpcm_shared *sh) -{ - u32 addr; - int rv; - u32 shaddr = 0; - struct sdpcm_shared_le sh_le; - __le32 addr_le; - - shaddr = bus->ci->rambase + bus->ramsize - 4; - - /* - * Read last word in socram to determine - * address of sdpcm_shared structure - */ - sdio_claim_host(bus->sdiodev->func[1]); - brcmf_sdio_bus_sleep(bus, false, false); - rv = brcmf_sdiod_ramrw(bus->sdiodev, false, shaddr, (u8 *)&addr_le, 4); - sdio_release_host(bus->sdiodev->func[1]); - if (rv < 0) - return rv; - - addr = le32_to_cpu(addr_le); - - brcmf_dbg(SDIO, "sdpcm_shared address 0x%08X\n", addr); - - /* - * Check if addr is valid. - * NVRAM length at the end of memory should have been overwritten. - */ - if (!brcmf_sdio_valid_shared_address(addr)) { - brcmf_err("invalid sdpcm_shared address 0x%08X\n", - addr); - return -EINVAL; - } - - /* Read hndrte_shared structure */ - rv = brcmf_sdiod_ramrw(bus->sdiodev, false, addr, (u8 *)&sh_le, - sizeof(struct sdpcm_shared_le)); - if (rv < 0) - return rv; - - /* Endianness */ - sh->flags = le32_to_cpu(sh_le.flags); - sh->trap_addr = le32_to_cpu(sh_le.trap_addr); - sh->assert_exp_addr = le32_to_cpu(sh_le.assert_exp_addr); - sh->assert_file_addr = le32_to_cpu(sh_le.assert_file_addr); - sh->assert_line = le32_to_cpu(sh_le.assert_line); - sh->console_addr = le32_to_cpu(sh_le.console_addr); - sh->msgtrace_addr = le32_to_cpu(sh_le.msgtrace_addr); - - if ((sh->flags & SDPCM_SHARED_VERSION_MASK) > SDPCM_SHARED_VERSION) { - brcmf_err("sdpcm shared version unsupported: dhd %d dongle %d\n", - SDPCM_SHARED_VERSION, - sh->flags & SDPCM_SHARED_VERSION_MASK); - return -EPROTO; - } - - return 0; -} - -static void brcmf_sdio_get_console_addr(struct brcmf_sdio *bus) -{ - struct sdpcm_shared sh; - - if (brcmf_sdio_readshared(bus, &sh) == 0) - bus->console_addr = sh.console_addr; -} -#else -static void brcmf_sdio_get_console_addr(struct brcmf_sdio *bus) -{ -} -#endif /* DEBUG */ - -static u32 brcmf_sdio_hostmail(struct brcmf_sdio *bus) -{ - u32 intstatus = 0; - u32 hmb_data; - u8 fcbits; - int ret; - - brcmf_dbg(SDIO, "Enter\n"); - - /* Read mailbox data and ack that we did so */ - ret = r_sdreg32(bus, &hmb_data, - offsetof(struct sdpcmd_regs, tohostmailboxdata)); - - if (ret == 0) - w_sdreg32(bus, SMB_INT_ACK, - offsetof(struct sdpcmd_regs, tosbmailbox)); - bus->sdcnt.f1regdata += 2; - - /* Dongle recomposed rx frames, accept them again */ - if (hmb_data & HMB_DATA_NAKHANDLED) { - brcmf_dbg(SDIO, "Dongle reports NAK handled, expect rtx of %d\n", - bus->rx_seq); - if (!bus->rxskip) - brcmf_err("unexpected NAKHANDLED!\n"); - - bus->rxskip = false; - intstatus |= I_HMB_FRAME_IND; - } - - /* - * DEVREADY does not occur with gSPI. - */ - if (hmb_data & (HMB_DATA_DEVREADY | HMB_DATA_FWREADY)) { - bus->sdpcm_ver = - (hmb_data & HMB_DATA_VERSION_MASK) >> - HMB_DATA_VERSION_SHIFT; - if (bus->sdpcm_ver != SDPCM_PROT_VERSION) - brcmf_err("Version mismatch, dongle reports %d, " - "expecting %d\n", - bus->sdpcm_ver, SDPCM_PROT_VERSION); - else - brcmf_dbg(SDIO, "Dongle ready, protocol version %d\n", - bus->sdpcm_ver); - - /* - * Retrieve console state address now that firmware should have - * updated it. - */ - brcmf_sdio_get_console_addr(bus); - } - - /* - * Flow Control has been moved into the RX headers and this out of band - * method isn't used any more. - * remaining backward compatible with older dongles. - */ - if (hmb_data & HMB_DATA_FC) { - fcbits = (hmb_data & HMB_DATA_FCDATA_MASK) >> - HMB_DATA_FCDATA_SHIFT; - - if (fcbits & ~bus->flowcontrol) - bus->sdcnt.fc_xoff++; - - if (bus->flowcontrol & ~fcbits) - bus->sdcnt.fc_xon++; - - bus->sdcnt.fc_rcvd++; - bus->flowcontrol = fcbits; - } - - /* Shouldn't be any others */ - if (hmb_data & ~(HMB_DATA_DEVREADY | - HMB_DATA_NAKHANDLED | - HMB_DATA_FC | - HMB_DATA_FWREADY | - HMB_DATA_FCDATA_MASK | HMB_DATA_VERSION_MASK)) - brcmf_err("Unknown mailbox data content: 0x%02x\n", - hmb_data); - - return intstatus; -} - -static void brcmf_sdio_rxfail(struct brcmf_sdio *bus, bool abort, bool rtx) -{ - uint retries = 0; - u16 lastrbc; - u8 hi, lo; - int err; - - brcmf_err("%sterminate frame%s\n", - abort ? "abort command, " : "", - rtx ? ", send NAK" : ""); - - if (abort) - brcmf_sdiod_abort(bus->sdiodev, SDIO_FUNC_2); - - brcmf_sdiod_regwb(bus->sdiodev, SBSDIO_FUNC1_FRAMECTRL, - SFC_RF_TERM, &err); - bus->sdcnt.f1regdata++; - - /* Wait until the packet has been flushed (device/FIFO stable) */ - for (lastrbc = retries = 0xffff; retries > 0; retries--) { - hi = brcmf_sdiod_regrb(bus->sdiodev, - SBSDIO_FUNC1_RFRAMEBCHI, &err); - lo = brcmf_sdiod_regrb(bus->sdiodev, - SBSDIO_FUNC1_RFRAMEBCLO, &err); - bus->sdcnt.f1regdata += 2; - - if ((hi == 0) && (lo == 0)) - break; - - if ((hi > (lastrbc >> 8)) && (lo > (lastrbc & 0x00ff))) { - brcmf_err("count growing: last 0x%04x now 0x%04x\n", - lastrbc, (hi << 8) + lo); - } - lastrbc = (hi << 8) + lo; - } - - if (!retries) - brcmf_err("count never zeroed: last 0x%04x\n", lastrbc); - else - brcmf_dbg(SDIO, "flush took %d iterations\n", 0xffff - retries); - - if (rtx) { - bus->sdcnt.rxrtx++; - err = w_sdreg32(bus, SMB_NAK, - offsetof(struct sdpcmd_regs, tosbmailbox)); - - bus->sdcnt.f1regdata++; - if (err == 0) - bus->rxskip = true; - } - - /* Clear partial in any case */ - bus->cur_read.len = 0; -} - -static void brcmf_sdio_txfail(struct brcmf_sdio *bus) -{ - struct brcmf_sdio_dev *sdiodev = bus->sdiodev; - u8 i, hi, lo; - - /* On failure, abort the command and terminate the frame */ - brcmf_err("sdio error, abort command and terminate frame\n"); - bus->sdcnt.tx_sderrs++; - - brcmf_sdiod_abort(sdiodev, SDIO_FUNC_2); - brcmf_sdiod_regwb(sdiodev, SBSDIO_FUNC1_FRAMECTRL, SFC_WF_TERM, NULL); - bus->sdcnt.f1regdata++; - - for (i = 0; i < 3; i++) { - hi = brcmf_sdiod_regrb(sdiodev, SBSDIO_FUNC1_WFRAMEBCHI, NULL); - lo = brcmf_sdiod_regrb(sdiodev, SBSDIO_FUNC1_WFRAMEBCLO, NULL); - bus->sdcnt.f1regdata += 2; - if ((hi == 0) && (lo == 0)) - break; - } -} - -/* return total length of buffer chain */ -static uint brcmf_sdio_glom_len(struct brcmf_sdio *bus) -{ - struct sk_buff *p; - uint total; - - total = 0; - skb_queue_walk(&bus->glom, p) - total += p->len; - return total; -} - -static void brcmf_sdio_free_glom(struct brcmf_sdio *bus) -{ - struct sk_buff *cur, *next; - - skb_queue_walk_safe(&bus->glom, cur, next) { - skb_unlink(cur, &bus->glom); - brcmu_pkt_buf_free_skb(cur); - } -} - -/** - * brcmfmac sdio bus specific header - * This is the lowest layer header wrapped on the packets transmitted between - * host and WiFi dongle which contains information needed for SDIO core and - * firmware - * - * It consists of 3 parts: hardware header, hardware extension header and - * software header - * hardware header (frame tag) - 4 bytes - * Byte 0~1: Frame length - * Byte 2~3: Checksum, bit-wise inverse of frame length - * hardware extension header - 8 bytes - * Tx glom mode only, N/A for Rx or normal Tx - * Byte 0~1: Packet length excluding hw frame tag - * Byte 2: Reserved - * Byte 3: Frame flags, bit 0: last frame indication - * Byte 4~5: Reserved - * Byte 6~7: Tail padding length - * software header - 8 bytes - * Byte 0: Rx/Tx sequence number - * Byte 1: 4 MSB Channel number, 4 LSB arbitrary flag - * Byte 2: Length of next data frame, reserved for Tx - * Byte 3: Data offset - * Byte 4: Flow control bits, reserved for Tx - * Byte 5: Maximum Sequence number allowed by firmware for Tx, N/A for Tx packet - * Byte 6~7: Reserved - */ -#define SDPCM_HWHDR_LEN 4 -#define SDPCM_HWEXT_LEN 8 -#define SDPCM_SWHDR_LEN 8 -#define SDPCM_HDRLEN (SDPCM_HWHDR_LEN + SDPCM_SWHDR_LEN) -/* software header */ -#define SDPCM_SEQ_MASK 0x000000ff -#define SDPCM_SEQ_WRAP 256 -#define SDPCM_CHANNEL_MASK 0x00000f00 -#define SDPCM_CHANNEL_SHIFT 8 -#define SDPCM_CONTROL_CHANNEL 0 /* Control */ -#define SDPCM_EVENT_CHANNEL 1 /* Asyc Event Indication */ -#define SDPCM_DATA_CHANNEL 2 /* Data Xmit/Recv */ -#define SDPCM_GLOM_CHANNEL 3 /* Coalesced packets */ -#define SDPCM_TEST_CHANNEL 15 /* Test/debug packets */ -#define SDPCM_GLOMDESC(p) (((u8 *)p)[1] & 0x80) -#define SDPCM_NEXTLEN_MASK 0x00ff0000 -#define SDPCM_NEXTLEN_SHIFT 16 -#define SDPCM_DOFFSET_MASK 0xff000000 -#define SDPCM_DOFFSET_SHIFT 24 -#define SDPCM_FCMASK_MASK 0x000000ff -#define SDPCM_WINDOW_MASK 0x0000ff00 -#define SDPCM_WINDOW_SHIFT 8 - -static inline u8 brcmf_sdio_getdatoffset(u8 *swheader) -{ - u32 hdrvalue; - hdrvalue = *(u32 *)swheader; - return (u8)((hdrvalue & SDPCM_DOFFSET_MASK) >> SDPCM_DOFFSET_SHIFT); -} - -static int brcmf_sdio_hdparse(struct brcmf_sdio *bus, u8 *header, - struct brcmf_sdio_hdrinfo *rd, - enum brcmf_sdio_frmtype type) -{ - u16 len, checksum; - u8 rx_seq, fc, tx_seq_max; - u32 swheader; - - trace_brcmf_sdpcm_hdr(SDPCM_RX, header); - - /* hw header */ - len = get_unaligned_le16(header); - checksum = get_unaligned_le16(header + sizeof(u16)); - /* All zero means no more to read */ - if (!(len | checksum)) { - bus->rxpending = false; - return -ENODATA; - } - if ((u16)(~(len ^ checksum))) { - brcmf_err("HW header checksum error\n"); - bus->sdcnt.rx_badhdr++; - brcmf_sdio_rxfail(bus, false, false); - return -EIO; - } - if (len < SDPCM_HDRLEN) { - brcmf_err("HW header length error\n"); - return -EPROTO; - } - if (type == BRCMF_SDIO_FT_SUPER && - (roundup(len, bus->blocksize) != rd->len)) { - brcmf_err("HW superframe header length error\n"); - return -EPROTO; - } - if (type == BRCMF_SDIO_FT_SUB && len > rd->len) { - brcmf_err("HW subframe header length error\n"); - return -EPROTO; - } - rd->len = len; - - /* software header */ - header += SDPCM_HWHDR_LEN; - swheader = le32_to_cpu(*(__le32 *)header); - if (type == BRCMF_SDIO_FT_SUPER && SDPCM_GLOMDESC(header)) { - brcmf_err("Glom descriptor found in superframe head\n"); - rd->len = 0; - return -EINVAL; - } - rx_seq = (u8)(swheader & SDPCM_SEQ_MASK); - rd->channel = (swheader & SDPCM_CHANNEL_MASK) >> SDPCM_CHANNEL_SHIFT; - if (len > MAX_RX_DATASZ && rd->channel != SDPCM_CONTROL_CHANNEL && - type != BRCMF_SDIO_FT_SUPER) { - brcmf_err("HW header length too long\n"); - bus->sdcnt.rx_toolong++; - brcmf_sdio_rxfail(bus, false, false); - rd->len = 0; - return -EPROTO; - } - if (type == BRCMF_SDIO_FT_SUPER && rd->channel != SDPCM_GLOM_CHANNEL) { - brcmf_err("Wrong channel for superframe\n"); - rd->len = 0; - return -EINVAL; - } - if (type == BRCMF_SDIO_FT_SUB && rd->channel != SDPCM_DATA_CHANNEL && - rd->channel != SDPCM_EVENT_CHANNEL) { - brcmf_err("Wrong channel for subframe\n"); - rd->len = 0; - return -EINVAL; - } - rd->dat_offset = brcmf_sdio_getdatoffset(header); - if (rd->dat_offset < SDPCM_HDRLEN || rd->dat_offset > rd->len) { - brcmf_err("seq %d: bad data offset\n", rx_seq); - bus->sdcnt.rx_badhdr++; - brcmf_sdio_rxfail(bus, false, false); - rd->len = 0; - return -ENXIO; - } - if (rd->seq_num != rx_seq) { - brcmf_err("seq %d: sequence number error, expect %d\n", - rx_seq, rd->seq_num); - bus->sdcnt.rx_badseq++; - rd->seq_num = rx_seq; - } - /* no need to check the reset for subframe */ - if (type == BRCMF_SDIO_FT_SUB) - return 0; - rd->len_nxtfrm = (swheader & SDPCM_NEXTLEN_MASK) >> SDPCM_NEXTLEN_SHIFT; - if (rd->len_nxtfrm << 4 > MAX_RX_DATASZ) { - /* only warm for NON glom packet */ - if (rd->channel != SDPCM_GLOM_CHANNEL) - brcmf_err("seq %d: next length error\n", rx_seq); - rd->len_nxtfrm = 0; - } - swheader = le32_to_cpu(*(__le32 *)(header + 4)); - fc = swheader & SDPCM_FCMASK_MASK; - if (bus->flowcontrol != fc) { - if (~bus->flowcontrol & fc) - bus->sdcnt.fc_xoff++; - if (bus->flowcontrol & ~fc) - bus->sdcnt.fc_xon++; - bus->sdcnt.fc_rcvd++; - bus->flowcontrol = fc; - } - tx_seq_max = (swheader & SDPCM_WINDOW_MASK) >> SDPCM_WINDOW_SHIFT; - if ((u8)(tx_seq_max - bus->tx_seq) > 0x40) { - brcmf_err("seq %d: max tx seq number error\n", rx_seq); - tx_seq_max = bus->tx_seq + 2; - } - bus->tx_max = tx_seq_max; - - return 0; -} - -static inline void brcmf_sdio_update_hwhdr(u8 *header, u16 frm_length) -{ - *(__le16 *)header = cpu_to_le16(frm_length); - *(((__le16 *)header) + 1) = cpu_to_le16(~frm_length); -} - -static void brcmf_sdio_hdpack(struct brcmf_sdio *bus, u8 *header, - struct brcmf_sdio_hdrinfo *hd_info) -{ - u32 hdrval; - u8 hdr_offset; - - brcmf_sdio_update_hwhdr(header, hd_info->len); - hdr_offset = SDPCM_HWHDR_LEN; - - if (bus->txglom) { - hdrval = (hd_info->len - hdr_offset) | (hd_info->lastfrm << 24); - *((__le32 *)(header + hdr_offset)) = cpu_to_le32(hdrval); - hdrval = (u16)hd_info->tail_pad << 16; - *(((__le32 *)(header + hdr_offset)) + 1) = cpu_to_le32(hdrval); - hdr_offset += SDPCM_HWEXT_LEN; - } - - hdrval = hd_info->seq_num; - hdrval |= (hd_info->channel << SDPCM_CHANNEL_SHIFT) & - SDPCM_CHANNEL_MASK; - hdrval |= (hd_info->dat_offset << SDPCM_DOFFSET_SHIFT) & - SDPCM_DOFFSET_MASK; - *((__le32 *)(header + hdr_offset)) = cpu_to_le32(hdrval); - *(((__le32 *)(header + hdr_offset)) + 1) = 0; - trace_brcmf_sdpcm_hdr(SDPCM_TX + !!(bus->txglom), header); -} - -static u8 brcmf_sdio_rxglom(struct brcmf_sdio *bus, u8 rxseq) -{ - u16 dlen, totlen; - u8 *dptr, num = 0; - u16 sublen; - struct sk_buff *pfirst, *pnext; - - int errcode; - u8 doff, sfdoff; - - struct brcmf_sdio_hdrinfo rd_new; - - /* If packets, issue read(s) and send up packet chain */ - /* Return sequence numbers consumed? */ - - brcmf_dbg(SDIO, "start: glomd %p glom %p\n", - bus->glomd, skb_peek(&bus->glom)); - - /* If there's a descriptor, generate the packet chain */ - if (bus->glomd) { - pfirst = pnext = NULL; - dlen = (u16) (bus->glomd->len); - dptr = bus->glomd->data; - if (!dlen || (dlen & 1)) { - brcmf_err("bad glomd len(%d), ignore descriptor\n", - dlen); - dlen = 0; - } - - for (totlen = num = 0; dlen; num++) { - /* Get (and move past) next length */ - sublen = get_unaligned_le16(dptr); - dlen -= sizeof(u16); - dptr += sizeof(u16); - if ((sublen < SDPCM_HDRLEN) || - ((num == 0) && (sublen < (2 * SDPCM_HDRLEN)))) { - brcmf_err("descriptor len %d bad: %d\n", - num, sublen); - pnext = NULL; - break; - } - if (sublen % bus->sgentry_align) { - brcmf_err("sublen %d not multiple of %d\n", - sublen, bus->sgentry_align); - } - totlen += sublen; - - /* For last frame, adjust read len so total - is a block multiple */ - if (!dlen) { - sublen += - (roundup(totlen, bus->blocksize) - totlen); - totlen = roundup(totlen, bus->blocksize); - } - - /* Allocate/chain packet for next subframe */ - pnext = brcmu_pkt_buf_get_skb(sublen + bus->sgentry_align); - if (pnext == NULL) { - brcmf_err("bcm_pkt_buf_get_skb failed, num %d len %d\n", - num, sublen); - break; - } - skb_queue_tail(&bus->glom, pnext); - - /* Adhere to start alignment requirements */ - pkt_align(pnext, sublen, bus->sgentry_align); - } - - /* If all allocations succeeded, save packet chain - in bus structure */ - if (pnext) { - brcmf_dbg(GLOM, "allocated %d-byte packet chain for %d subframes\n", - totlen, num); - if (BRCMF_GLOM_ON() && bus->cur_read.len && - totlen != bus->cur_read.len) { - brcmf_dbg(GLOM, "glomdesc mismatch: nextlen %d glomdesc %d rxseq %d\n", - bus->cur_read.len, totlen, rxseq); - } - pfirst = pnext = NULL; - } else { - brcmf_sdio_free_glom(bus); - num = 0; - } - - /* Done with descriptor packet */ - brcmu_pkt_buf_free_skb(bus->glomd); - bus->glomd = NULL; - bus->cur_read.len = 0; - } - - /* Ok -- either we just generated a packet chain, - or had one from before */ - if (!skb_queue_empty(&bus->glom)) { - if (BRCMF_GLOM_ON()) { - brcmf_dbg(GLOM, "try superframe read, packet chain:\n"); - skb_queue_walk(&bus->glom, pnext) { - brcmf_dbg(GLOM, " %p: %p len 0x%04x (%d)\n", - pnext, (u8 *) (pnext->data), - pnext->len, pnext->len); - } - } - - pfirst = skb_peek(&bus->glom); - dlen = (u16) brcmf_sdio_glom_len(bus); - - /* Do an SDIO read for the superframe. Configurable iovar to - * read directly into the chained packet, or allocate a large - * packet and and copy into the chain. - */ - sdio_claim_host(bus->sdiodev->func[1]); - errcode = brcmf_sdiod_recv_chain(bus->sdiodev, - &bus->glom, dlen); - sdio_release_host(bus->sdiodev->func[1]); - bus->sdcnt.f2rxdata++; - - /* On failure, kill the superframe, allow a couple retries */ - if (errcode < 0) { - brcmf_err("glom read of %d bytes failed: %d\n", - dlen, errcode); - - sdio_claim_host(bus->sdiodev->func[1]); - if (bus->glomerr++ < 3) { - brcmf_sdio_rxfail(bus, true, true); - } else { - bus->glomerr = 0; - brcmf_sdio_rxfail(bus, true, false); - bus->sdcnt.rxglomfail++; - brcmf_sdio_free_glom(bus); - } - sdio_release_host(bus->sdiodev->func[1]); - return 0; - } - - brcmf_dbg_hex_dump(BRCMF_GLOM_ON(), - pfirst->data, min_t(int, pfirst->len, 48), - "SUPERFRAME:\n"); - - rd_new.seq_num = rxseq; - rd_new.len = dlen; - sdio_claim_host(bus->sdiodev->func[1]); - errcode = brcmf_sdio_hdparse(bus, pfirst->data, &rd_new, - BRCMF_SDIO_FT_SUPER); - sdio_release_host(bus->sdiodev->func[1]); - bus->cur_read.len = rd_new.len_nxtfrm << 4; - - /* Remove superframe header, remember offset */ - skb_pull(pfirst, rd_new.dat_offset); - sfdoff = rd_new.dat_offset; - num = 0; - - /* Validate all the subframe headers */ - skb_queue_walk(&bus->glom, pnext) { - /* leave when invalid subframe is found */ - if (errcode) - break; - - rd_new.len = pnext->len; - rd_new.seq_num = rxseq++; - sdio_claim_host(bus->sdiodev->func[1]); - errcode = brcmf_sdio_hdparse(bus, pnext->data, &rd_new, - BRCMF_SDIO_FT_SUB); - sdio_release_host(bus->sdiodev->func[1]); - brcmf_dbg_hex_dump(BRCMF_GLOM_ON(), - pnext->data, 32, "subframe:\n"); - - num++; - } - - if (errcode) { - /* Terminate frame on error, request - a couple retries */ - sdio_claim_host(bus->sdiodev->func[1]); - if (bus->glomerr++ < 3) { - /* Restore superframe header space */ - skb_push(pfirst, sfdoff); - brcmf_sdio_rxfail(bus, true, true); - } else { - bus->glomerr = 0; - brcmf_sdio_rxfail(bus, true, false); - bus->sdcnt.rxglomfail++; - brcmf_sdio_free_glom(bus); - } - sdio_release_host(bus->sdiodev->func[1]); - bus->cur_read.len = 0; - return 0; - } - - /* Basic SD framing looks ok - process each packet (header) */ - - skb_queue_walk_safe(&bus->glom, pfirst, pnext) { - dptr = (u8 *) (pfirst->data); - sublen = get_unaligned_le16(dptr); - doff = brcmf_sdio_getdatoffset(&dptr[SDPCM_HWHDR_LEN]); - - brcmf_dbg_hex_dump(BRCMF_BYTES_ON() && BRCMF_DATA_ON(), - dptr, pfirst->len, - "Rx Subframe Data:\n"); - - __skb_trim(pfirst, sublen); - skb_pull(pfirst, doff); - - if (pfirst->len == 0) { - skb_unlink(pfirst, &bus->glom); - brcmu_pkt_buf_free_skb(pfirst); - continue; - } - - brcmf_dbg_hex_dump(BRCMF_GLOM_ON(), - pfirst->data, - min_t(int, pfirst->len, 32), - "subframe %d to stack, %p (%p/%d) nxt/lnk %p/%p\n", - bus->glom.qlen, pfirst, pfirst->data, - pfirst->len, pfirst->next, - pfirst->prev); - skb_unlink(pfirst, &bus->glom); - brcmf_rx_frame(bus->sdiodev->dev, pfirst); - bus->sdcnt.rxglompkts++; - } - - bus->sdcnt.rxglomframes++; - } - return num; -} - -static int brcmf_sdio_dcmd_resp_wait(struct brcmf_sdio *bus, uint *condition, - bool *pending) -{ - DECLARE_WAITQUEUE(wait, current); - int timeout = msecs_to_jiffies(DCMD_RESP_TIMEOUT); - - /* Wait until control frame is available */ - add_wait_queue(&bus->dcmd_resp_wait, &wait); - set_current_state(TASK_INTERRUPTIBLE); - - while (!(*condition) && (!signal_pending(current) && timeout)) - timeout = schedule_timeout(timeout); - - if (signal_pending(current)) - *pending = true; - - set_current_state(TASK_RUNNING); - remove_wait_queue(&bus->dcmd_resp_wait, &wait); - - return timeout; -} - -static int brcmf_sdio_dcmd_resp_wake(struct brcmf_sdio *bus) -{ - if (waitqueue_active(&bus->dcmd_resp_wait)) - wake_up_interruptible(&bus->dcmd_resp_wait); - - return 0; -} -static void -brcmf_sdio_read_control(struct brcmf_sdio *bus, u8 *hdr, uint len, uint doff) -{ - uint rdlen, pad; - u8 *buf = NULL, *rbuf; - int sdret; - - brcmf_dbg(TRACE, "Enter\n"); - - if (bus->rxblen) - buf = vzalloc(bus->rxblen); - if (!buf) - goto done; - - rbuf = bus->rxbuf; - pad = ((unsigned long)rbuf % bus->head_align); - if (pad) - rbuf += (bus->head_align - pad); - - /* Copy the already-read portion over */ - memcpy(buf, hdr, BRCMF_FIRSTREAD); - if (len <= BRCMF_FIRSTREAD) - goto gotpkt; - - /* Raise rdlen to next SDIO block to avoid tail command */ - rdlen = len - BRCMF_FIRSTREAD; - if (bus->roundup && bus->blocksize && (rdlen > bus->blocksize)) { - pad = bus->blocksize - (rdlen % bus->blocksize); - if ((pad <= bus->roundup) && (pad < bus->blocksize) && - ((len + pad) < bus->sdiodev->bus_if->maxctl)) - rdlen += pad; - } else if (rdlen % bus->head_align) { - rdlen += bus->head_align - (rdlen % bus->head_align); - } - - /* Drop if the read is too big or it exceeds our maximum */ - if ((rdlen + BRCMF_FIRSTREAD) > bus->sdiodev->bus_if->maxctl) { - brcmf_err("%d-byte control read exceeds %d-byte buffer\n", - rdlen, bus->sdiodev->bus_if->maxctl); - brcmf_sdio_rxfail(bus, false, false); - goto done; - } - - if ((len - doff) > bus->sdiodev->bus_if->maxctl) { - brcmf_err("%d-byte ctl frame (%d-byte ctl data) exceeds %d-byte limit\n", - len, len - doff, bus->sdiodev->bus_if->maxctl); - bus->sdcnt.rx_toolong++; - brcmf_sdio_rxfail(bus, false, false); - goto done; - } - - /* Read remain of frame body */ - sdret = brcmf_sdiod_recv_buf(bus->sdiodev, rbuf, rdlen); - bus->sdcnt.f2rxdata++; - - /* Control frame failures need retransmission */ - if (sdret < 0) { - brcmf_err("read %d control bytes failed: %d\n", - rdlen, sdret); - bus->sdcnt.rxc_errors++; - brcmf_sdio_rxfail(bus, true, true); - goto done; - } else - memcpy(buf + BRCMF_FIRSTREAD, rbuf, rdlen); - -gotpkt: - - brcmf_dbg_hex_dump(BRCMF_BYTES_ON() && BRCMF_CTL_ON(), - buf, len, "RxCtrl:\n"); - - /* Point to valid data and indicate its length */ - spin_lock_bh(&bus->rxctl_lock); - if (bus->rxctl) { - brcmf_err("last control frame is being processed.\n"); - spin_unlock_bh(&bus->rxctl_lock); - vfree(buf); - goto done; - } - bus->rxctl = buf + doff; - bus->rxctl_orig = buf; - bus->rxlen = len - doff; - spin_unlock_bh(&bus->rxctl_lock); - -done: - /* Awake any waiters */ - brcmf_sdio_dcmd_resp_wake(bus); -} - -/* Pad read to blocksize for efficiency */ -static void brcmf_sdio_pad(struct brcmf_sdio *bus, u16 *pad, u16 *rdlen) -{ - if (bus->roundup && bus->blocksize && *rdlen > bus->blocksize) { - *pad = bus->blocksize - (*rdlen % bus->blocksize); - if (*pad <= bus->roundup && *pad < bus->blocksize && - *rdlen + *pad + BRCMF_FIRSTREAD < MAX_RX_DATASZ) - *rdlen += *pad; - } else if (*rdlen % bus->head_align) { - *rdlen += bus->head_align - (*rdlen % bus->head_align); - } -} - -static uint brcmf_sdio_readframes(struct brcmf_sdio *bus, uint maxframes) -{ - struct sk_buff *pkt; /* Packet for event or data frames */ - u16 pad; /* Number of pad bytes to read */ - uint rxleft = 0; /* Remaining number of frames allowed */ - int ret; /* Return code from calls */ - uint rxcount = 0; /* Total frames read */ - struct brcmf_sdio_hdrinfo *rd = &bus->cur_read, rd_new; - u8 head_read = 0; - - brcmf_dbg(TRACE, "Enter\n"); - - /* Not finished unless we encounter no more frames indication */ - bus->rxpending = true; - - for (rd->seq_num = bus->rx_seq, rxleft = maxframes; - !bus->rxskip && rxleft && brcmf_bus_ready(bus->sdiodev->bus_if); - rd->seq_num++, rxleft--) { - - /* Handle glomming separately */ - if (bus->glomd || !skb_queue_empty(&bus->glom)) { - u8 cnt; - brcmf_dbg(GLOM, "calling rxglom: glomd %p, glom %p\n", - bus->glomd, skb_peek(&bus->glom)); - cnt = brcmf_sdio_rxglom(bus, rd->seq_num); - brcmf_dbg(GLOM, "rxglom returned %d\n", cnt); - rd->seq_num += cnt - 1; - rxleft = (rxleft > cnt) ? (rxleft - cnt) : 1; - continue; - } - - rd->len_left = rd->len; - /* read header first for unknow frame length */ - sdio_claim_host(bus->sdiodev->func[1]); - if (!rd->len) { - ret = brcmf_sdiod_recv_buf(bus->sdiodev, - bus->rxhdr, BRCMF_FIRSTREAD); - bus->sdcnt.f2rxhdrs++; - if (ret < 0) { - brcmf_err("RXHEADER FAILED: %d\n", - ret); - bus->sdcnt.rx_hdrfail++; - brcmf_sdio_rxfail(bus, true, true); - sdio_release_host(bus->sdiodev->func[1]); - continue; - } - - brcmf_dbg_hex_dump(BRCMF_BYTES_ON() || BRCMF_HDRS_ON(), - bus->rxhdr, SDPCM_HDRLEN, - "RxHdr:\n"); - - if (brcmf_sdio_hdparse(bus, bus->rxhdr, rd, - BRCMF_SDIO_FT_NORMAL)) { - sdio_release_host(bus->sdiodev->func[1]); - if (!bus->rxpending) - break; - else - continue; - } - - if (rd->channel == SDPCM_CONTROL_CHANNEL) { - brcmf_sdio_read_control(bus, bus->rxhdr, - rd->len, - rd->dat_offset); - /* prepare the descriptor for the next read */ - rd->len = rd->len_nxtfrm << 4; - rd->len_nxtfrm = 0; - /* treat all packet as event if we don't know */ - rd->channel = SDPCM_EVENT_CHANNEL; - sdio_release_host(bus->sdiodev->func[1]); - continue; - } - rd->len_left = rd->len > BRCMF_FIRSTREAD ? - rd->len - BRCMF_FIRSTREAD : 0; - head_read = BRCMF_FIRSTREAD; - } - - brcmf_sdio_pad(bus, &pad, &rd->len_left); - - pkt = brcmu_pkt_buf_get_skb(rd->len_left + head_read + - bus->head_align); - if (!pkt) { - /* Give up on data, request rtx of events */ - brcmf_err("brcmu_pkt_buf_get_skb failed\n"); - brcmf_sdio_rxfail(bus, false, - RETRYCHAN(rd->channel)); - sdio_release_host(bus->sdiodev->func[1]); - continue; - } - skb_pull(pkt, head_read); - pkt_align(pkt, rd->len_left, bus->head_align); - - ret = brcmf_sdiod_recv_pkt(bus->sdiodev, pkt); - bus->sdcnt.f2rxdata++; - sdio_release_host(bus->sdiodev->func[1]); - - if (ret < 0) { - brcmf_err("read %d bytes from channel %d failed: %d\n", - rd->len, rd->channel, ret); - brcmu_pkt_buf_free_skb(pkt); - sdio_claim_host(bus->sdiodev->func[1]); - brcmf_sdio_rxfail(bus, true, - RETRYCHAN(rd->channel)); - sdio_release_host(bus->sdiodev->func[1]); - continue; - } - - if (head_read) { - skb_push(pkt, head_read); - memcpy(pkt->data, bus->rxhdr, head_read); - head_read = 0; - } else { - memcpy(bus->rxhdr, pkt->data, SDPCM_HDRLEN); - rd_new.seq_num = rd->seq_num; - sdio_claim_host(bus->sdiodev->func[1]); - if (brcmf_sdio_hdparse(bus, bus->rxhdr, &rd_new, - BRCMF_SDIO_FT_NORMAL)) { - rd->len = 0; - brcmu_pkt_buf_free_skb(pkt); - } - bus->sdcnt.rx_readahead_cnt++; - if (rd->len != roundup(rd_new.len, 16)) { - brcmf_err("frame length mismatch:read %d, should be %d\n", - rd->len, - roundup(rd_new.len, 16) >> 4); - rd->len = 0; - brcmf_sdio_rxfail(bus, true, true); - sdio_release_host(bus->sdiodev->func[1]); - brcmu_pkt_buf_free_skb(pkt); - continue; - } - sdio_release_host(bus->sdiodev->func[1]); - rd->len_nxtfrm = rd_new.len_nxtfrm; - rd->channel = rd_new.channel; - rd->dat_offset = rd_new.dat_offset; - - brcmf_dbg_hex_dump(!(BRCMF_BYTES_ON() && - BRCMF_DATA_ON()) && - BRCMF_HDRS_ON(), - bus->rxhdr, SDPCM_HDRLEN, - "RxHdr:\n"); - - if (rd_new.channel == SDPCM_CONTROL_CHANNEL) { - brcmf_err("readahead on control packet %d?\n", - rd_new.seq_num); - /* Force retry w/normal header read */ - rd->len = 0; - sdio_claim_host(bus->sdiodev->func[1]); - brcmf_sdio_rxfail(bus, false, true); - sdio_release_host(bus->sdiodev->func[1]); - brcmu_pkt_buf_free_skb(pkt); - continue; - } - } - - brcmf_dbg_hex_dump(BRCMF_BYTES_ON() && BRCMF_DATA_ON(), - pkt->data, rd->len, "Rx Data:\n"); - - /* Save superframe descriptor and allocate packet frame */ - if (rd->channel == SDPCM_GLOM_CHANNEL) { - if (SDPCM_GLOMDESC(&bus->rxhdr[SDPCM_HWHDR_LEN])) { - brcmf_dbg(GLOM, "glom descriptor, %d bytes:\n", - rd->len); - brcmf_dbg_hex_dump(BRCMF_GLOM_ON(), - pkt->data, rd->len, - "Glom Data:\n"); - __skb_trim(pkt, rd->len); - skb_pull(pkt, SDPCM_HDRLEN); - bus->glomd = pkt; - } else { - brcmf_err("%s: glom superframe w/o " - "descriptor!\n", __func__); - sdio_claim_host(bus->sdiodev->func[1]); - brcmf_sdio_rxfail(bus, false, false); - sdio_release_host(bus->sdiodev->func[1]); - } - /* prepare the descriptor for the next read */ - rd->len = rd->len_nxtfrm << 4; - rd->len_nxtfrm = 0; - /* treat all packet as event if we don't know */ - rd->channel = SDPCM_EVENT_CHANNEL; - continue; - } - - /* Fill in packet len and prio, deliver upward */ - __skb_trim(pkt, rd->len); - skb_pull(pkt, rd->dat_offset); - - /* prepare the descriptor for the next read */ - rd->len = rd->len_nxtfrm << 4; - rd->len_nxtfrm = 0; - /* treat all packet as event if we don't know */ - rd->channel = SDPCM_EVENT_CHANNEL; - - if (pkt->len == 0) { - brcmu_pkt_buf_free_skb(pkt); - continue; - } - - brcmf_rx_frame(bus->sdiodev->dev, pkt); - } - - rxcount = maxframes - rxleft; - /* Message if we hit the limit */ - if (!rxleft) - brcmf_dbg(DATA, "hit rx limit of %d frames\n", maxframes); - else - brcmf_dbg(DATA, "processed %d frames\n", rxcount); - /* Back off rxseq if awaiting rtx, update rx_seq */ - if (bus->rxskip) - rd->seq_num--; - bus->rx_seq = rd->seq_num; - - return rxcount; -} - -static void -brcmf_sdio_wait_event_wakeup(struct brcmf_sdio *bus) -{ - if (waitqueue_active(&bus->ctrl_wait)) - wake_up_interruptible(&bus->ctrl_wait); - return; -} - -static int brcmf_sdio_txpkt_hdalign(struct brcmf_sdio *bus, struct sk_buff *pkt) -{ - u16 head_pad; - u8 *dat_buf; - - dat_buf = (u8 *)(pkt->data); - - /* Check head padding */ - head_pad = ((unsigned long)dat_buf % bus->head_align); - if (head_pad) { - if (skb_headroom(pkt) < head_pad) { - bus->sdiodev->bus_if->tx_realloc++; - head_pad = 0; - if (skb_cow(pkt, head_pad)) - return -ENOMEM; - } - skb_push(pkt, head_pad); - dat_buf = (u8 *)(pkt->data); - memset(dat_buf, 0, head_pad + bus->tx_hdrlen); - } - return head_pad; -} - -/** - * struct brcmf_skbuff_cb reserves first two bytes in sk_buff::cb for - * bus layer usage. - */ -/* flag marking a dummy skb added for DMA alignment requirement */ -#define ALIGN_SKB_FLAG 0x8000 -/* bit mask of data length chopped from the previous packet */ -#define ALIGN_SKB_CHOP_LEN_MASK 0x7fff - -static int brcmf_sdio_txpkt_prep_sg(struct brcmf_sdio *bus, - struct sk_buff_head *pktq, - struct sk_buff *pkt, u16 total_len) -{ - struct brcmf_sdio_dev *sdiodev; - struct sk_buff *pkt_pad; - u16 tail_pad, tail_chop, chain_pad; - unsigned int blksize; - bool lastfrm; - int ntail, ret; - - sdiodev = bus->sdiodev; - blksize = sdiodev->func[SDIO_FUNC_2]->cur_blksize; - /* sg entry alignment should be a divisor of block size */ - WARN_ON(blksize % bus->sgentry_align); - - /* Check tail padding */ - lastfrm = skb_queue_is_last(pktq, pkt); - tail_pad = 0; - tail_chop = pkt->len % bus->sgentry_align; - if (tail_chop) - tail_pad = bus->sgentry_align - tail_chop; - chain_pad = (total_len + tail_pad) % blksize; - if (lastfrm && chain_pad) - tail_pad += blksize - chain_pad; - if (skb_tailroom(pkt) < tail_pad && pkt->len > blksize) { - pkt_pad = brcmu_pkt_buf_get_skb(tail_pad + tail_chop + - bus->head_align); - if (pkt_pad == NULL) - return -ENOMEM; - ret = brcmf_sdio_txpkt_hdalign(bus, pkt_pad); - if (unlikely(ret < 0)) { - kfree_skb(pkt_pad); - return ret; - } - memcpy(pkt_pad->data, - pkt->data + pkt->len - tail_chop, - tail_chop); - *(u16 *)(pkt_pad->cb) = ALIGN_SKB_FLAG + tail_chop; - skb_trim(pkt, pkt->len - tail_chop); - skb_trim(pkt_pad, tail_pad + tail_chop); - __skb_queue_after(pktq, pkt, pkt_pad); - } else { - ntail = pkt->data_len + tail_pad - - (pkt->end - pkt->tail); - if (skb_cloned(pkt) || ntail > 0) - if (pskb_expand_head(pkt, 0, ntail, GFP_ATOMIC)) - return -ENOMEM; - if (skb_linearize(pkt)) - return -ENOMEM; - __skb_put(pkt, tail_pad); - } - - return tail_pad; -} - -/** - * brcmf_sdio_txpkt_prep - packet preparation for transmit - * @bus: brcmf_sdio structure pointer - * @pktq: packet list pointer - * @chan: virtual channel to transmit the packet - * - * Processes to be applied to the packet - * - Align data buffer pointer - * - Align data buffer length - * - Prepare header - * Return: negative value if there is error - */ -static int -brcmf_sdio_txpkt_prep(struct brcmf_sdio *bus, struct sk_buff_head *pktq, - uint chan) -{ - u16 head_pad, total_len; - struct sk_buff *pkt_next; - u8 txseq; - int ret; - struct brcmf_sdio_hdrinfo hd_info = {0}; - - txseq = bus->tx_seq; - total_len = 0; - skb_queue_walk(pktq, pkt_next) { - /* alignment packet inserted in previous - * loop cycle can be skipped as it is - * already properly aligned and does not - * need an sdpcm header. - */ - if (*(u16 *)(pkt_next->cb) & ALIGN_SKB_FLAG) - continue; - - /* align packet data pointer */ - ret = brcmf_sdio_txpkt_hdalign(bus, pkt_next); - if (ret < 0) - return ret; - head_pad = (u16)ret; - if (head_pad) - memset(pkt_next->data + bus->tx_hdrlen, 0, head_pad); - - total_len += pkt_next->len; - - hd_info.len = pkt_next->len; - hd_info.lastfrm = skb_queue_is_last(pktq, pkt_next); - if (bus->txglom && pktq->qlen > 1) { - ret = brcmf_sdio_txpkt_prep_sg(bus, pktq, - pkt_next, total_len); - if (ret < 0) - return ret; - hd_info.tail_pad = (u16)ret; - total_len += (u16)ret; - } - - hd_info.channel = chan; - hd_info.dat_offset = head_pad + bus->tx_hdrlen; - hd_info.seq_num = txseq++; - - /* Now fill the header */ - brcmf_sdio_hdpack(bus, pkt_next->data, &hd_info); - - if (BRCMF_BYTES_ON() && - ((BRCMF_CTL_ON() && chan == SDPCM_CONTROL_CHANNEL) || - (BRCMF_DATA_ON() && chan != SDPCM_CONTROL_CHANNEL))) - brcmf_dbg_hex_dump(true, pkt_next->data, hd_info.len, - "Tx Frame:\n"); - else if (BRCMF_HDRS_ON()) - brcmf_dbg_hex_dump(true, pkt_next->data, - head_pad + bus->tx_hdrlen, - "Tx Header:\n"); - } - /* Hardware length tag of the first packet should be total - * length of the chain (including padding) - */ - if (bus->txglom) - brcmf_sdio_update_hwhdr(pktq->next->data, total_len); - return 0; -} - -/** - * brcmf_sdio_txpkt_postp - packet post processing for transmit - * @bus: brcmf_sdio structure pointer - * @pktq: packet list pointer - * - * Processes to be applied to the packet - * - Remove head padding - * - Remove tail padding - */ -static void -brcmf_sdio_txpkt_postp(struct brcmf_sdio *bus, struct sk_buff_head *pktq) -{ - u8 *hdr; - u32 dat_offset; - u16 tail_pad; - u16 dummy_flags, chop_len; - struct sk_buff *pkt_next, *tmp, *pkt_prev; - - skb_queue_walk_safe(pktq, pkt_next, tmp) { - dummy_flags = *(u16 *)(pkt_next->cb); - if (dummy_flags & ALIGN_SKB_FLAG) { - chop_len = dummy_flags & ALIGN_SKB_CHOP_LEN_MASK; - if (chop_len) { - pkt_prev = pkt_next->prev; - skb_put(pkt_prev, chop_len); - } - __skb_unlink(pkt_next, pktq); - brcmu_pkt_buf_free_skb(pkt_next); - } else { - hdr = pkt_next->data + bus->tx_hdrlen - SDPCM_SWHDR_LEN; - dat_offset = le32_to_cpu(*(__le32 *)hdr); - dat_offset = (dat_offset & SDPCM_DOFFSET_MASK) >> - SDPCM_DOFFSET_SHIFT; - skb_pull(pkt_next, dat_offset); - if (bus->txglom) { - tail_pad = le16_to_cpu(*(__le16 *)(hdr - 2)); - skb_trim(pkt_next, pkt_next->len - tail_pad); - } - } - } -} - -/* Writes a HW/SW header into the packet and sends it. */ -/* Assumes: (a) header space already there, (b) caller holds lock */ -static int brcmf_sdio_txpkt(struct brcmf_sdio *bus, struct sk_buff_head *pktq, - uint chan) -{ - int ret; - struct sk_buff *pkt_next, *tmp; - - brcmf_dbg(TRACE, "Enter\n"); - - ret = brcmf_sdio_txpkt_prep(bus, pktq, chan); - if (ret) - goto done; - - sdio_claim_host(bus->sdiodev->func[1]); - ret = brcmf_sdiod_send_pkt(bus->sdiodev, pktq); - bus->sdcnt.f2txdata++; - - if (ret < 0) - brcmf_sdio_txfail(bus); - - sdio_release_host(bus->sdiodev->func[1]); - -done: - brcmf_sdio_txpkt_postp(bus, pktq); - if (ret == 0) - bus->tx_seq = (bus->tx_seq + pktq->qlen) % SDPCM_SEQ_WRAP; - skb_queue_walk_safe(pktq, pkt_next, tmp) { - __skb_unlink(pkt_next, pktq); - brcmf_txcomplete(bus->sdiodev->dev, pkt_next, ret == 0); - } - return ret; -} - -static uint brcmf_sdio_sendfromq(struct brcmf_sdio *bus, uint maxframes) -{ - struct sk_buff *pkt; - struct sk_buff_head pktq; - u32 intstatus = 0; - int ret = 0, prec_out, i; - uint cnt = 0; - u8 tx_prec_map, pkt_num; - - brcmf_dbg(TRACE, "Enter\n"); - - tx_prec_map = ~bus->flowcontrol; - - /* Send frames until the limit or some other event */ - for (cnt = 0; (cnt < maxframes) && data_ok(bus);) { - pkt_num = 1; - if (down_interruptible(&bus->tx_seq_lock)) - return cnt; - if (bus->txglom) - pkt_num = min_t(u8, bus->tx_max - bus->tx_seq, - bus->sdiodev->txglomsz); - pkt_num = min_t(u32, pkt_num, - brcmu_pktq_mlen(&bus->txq, ~bus->flowcontrol)); - __skb_queue_head_init(&pktq); - spin_lock_bh(&bus->txq_lock); - for (i = 0; i < pkt_num; i++) { - pkt = brcmu_pktq_mdeq(&bus->txq, tx_prec_map, - &prec_out); - if (pkt == NULL) - break; - __skb_queue_tail(&pktq, pkt); - } - spin_unlock_bh(&bus->txq_lock); - if (i == 0) { - up(&bus->tx_seq_lock); - break; - } - - ret = brcmf_sdio_txpkt(bus, &pktq, SDPCM_DATA_CHANNEL); - up(&bus->tx_seq_lock); - - cnt += i; - - /* In poll mode, need to check for other events */ - if (!bus->intr) { - /* Check device status, signal pending interrupt */ - sdio_claim_host(bus->sdiodev->func[1]); - ret = r_sdreg32(bus, &intstatus, - offsetof(struct sdpcmd_regs, - intstatus)); - sdio_release_host(bus->sdiodev->func[1]); - bus->sdcnt.f2txdata++; - if (ret != 0) - break; - if (intstatus & bus->hostintmask) - atomic_set(&bus->ipend, 1); - } - } - - /* Deflow-control stack if needed */ - if ((bus->sdiodev->bus_if->state == BRCMF_BUS_DATA) && - bus->txoff && (pktq_len(&bus->txq) < TXLOW)) { - bus->txoff = false; - brcmf_txflowblock(bus->sdiodev->dev, false); - } - - return cnt; -} - -static int brcmf_sdio_tx_ctrlframe(struct brcmf_sdio *bus, u8 *frame, u16 len) -{ - u8 doff; - u16 pad; - uint retries = 0; - struct brcmf_sdio_hdrinfo hd_info = {0}; - int ret; - - brcmf_dbg(TRACE, "Enter\n"); - - /* Back the pointer to make room for bus header */ - frame -= bus->tx_hdrlen; - len += bus->tx_hdrlen; - - /* Add alignment padding (optional for ctl frames) */ - doff = ((unsigned long)frame % bus->head_align); - if (doff) { - frame -= doff; - len += doff; - memset(frame + bus->tx_hdrlen, 0, doff); - } - - /* Round send length to next SDIO block */ - pad = 0; - if (bus->roundup && bus->blocksize && (len > bus->blocksize)) { - pad = bus->blocksize - (len % bus->blocksize); - if ((pad > bus->roundup) || (pad >= bus->blocksize)) - pad = 0; - } else if (len % bus->head_align) { - pad = bus->head_align - (len % bus->head_align); - } - len += pad; - - hd_info.len = len - pad; - hd_info.channel = SDPCM_CONTROL_CHANNEL; - hd_info.dat_offset = doff + bus->tx_hdrlen; - hd_info.seq_num = bus->tx_seq; - hd_info.lastfrm = true; - hd_info.tail_pad = pad; - brcmf_sdio_hdpack(bus, frame, &hd_info); - - if (bus->txglom) - brcmf_sdio_update_hwhdr(frame, len); - - brcmf_dbg_hex_dump(BRCMF_BYTES_ON() && BRCMF_CTL_ON(), - frame, len, "Tx Frame:\n"); - brcmf_dbg_hex_dump(!(BRCMF_BYTES_ON() && BRCMF_CTL_ON()) && - BRCMF_HDRS_ON(), - frame, min_t(u16, len, 16), "TxHdr:\n"); - - do { - ret = brcmf_sdiod_send_buf(bus->sdiodev, frame, len); - - if (ret < 0) - brcmf_sdio_txfail(bus); - else - bus->tx_seq = (bus->tx_seq + 1) % SDPCM_SEQ_WRAP; - } while (ret < 0 && retries++ < TXRETRIES); - - return ret; -} - -static void brcmf_sdio_bus_stop(struct device *dev) -{ - u32 local_hostintmask; - u8 saveclk; - int err; - struct brcmf_bus *bus_if = dev_get_drvdata(dev); - struct brcmf_sdio_dev *sdiodev = bus_if->bus_priv.sdio; - struct brcmf_sdio *bus = sdiodev->bus; - - brcmf_dbg(TRACE, "Enter\n"); - - if (bus->watchdog_tsk) { - send_sig(SIGTERM, bus->watchdog_tsk, 1); - kthread_stop(bus->watchdog_tsk); - bus->watchdog_tsk = NULL; - } - - if (bus_if->state == BRCMF_BUS_DOWN) { - sdio_claim_host(sdiodev->func[1]); - - /* Enable clock for device interrupts */ - brcmf_sdio_bus_sleep(bus, false, false); - - /* Disable and clear interrupts at the chip level also */ - w_sdreg32(bus, 0, offsetof(struct sdpcmd_regs, hostintmask)); - local_hostintmask = bus->hostintmask; - bus->hostintmask = 0; - - /* Force backplane clocks to assure F2 interrupt propagates */ - saveclk = brcmf_sdiod_regrb(sdiodev, SBSDIO_FUNC1_CHIPCLKCSR, - &err); - if (!err) - brcmf_sdiod_regwb(sdiodev, SBSDIO_FUNC1_CHIPCLKCSR, - (saveclk | SBSDIO_FORCE_HT), &err); - if (err) - brcmf_err("Failed to force clock for F2: err %d\n", - err); - - /* Turn off the bus (F2), free any pending packets */ - brcmf_dbg(INTR, "disable SDIO interrupts\n"); - sdio_disable_func(sdiodev->func[SDIO_FUNC_2]); - - /* Clear any pending interrupts now that F2 is disabled */ - w_sdreg32(bus, local_hostintmask, - offsetof(struct sdpcmd_regs, intstatus)); - - sdio_release_host(sdiodev->func[1]); - } - /* Clear the data packet queues */ - brcmu_pktq_flush(&bus->txq, true, NULL, NULL); - - /* Clear any held glomming stuff */ - if (bus->glomd) - brcmu_pkt_buf_free_skb(bus->glomd); - brcmf_sdio_free_glom(bus); - - /* Clear rx control and wake any waiters */ - spin_lock_bh(&bus->rxctl_lock); - bus->rxlen = 0; - spin_unlock_bh(&bus->rxctl_lock); - brcmf_sdio_dcmd_resp_wake(bus); - - /* Reset some F2 state stuff */ - bus->rxskip = false; - bus->tx_seq = bus->rx_seq = 0; -} - -static inline void brcmf_sdio_clrintr(struct brcmf_sdio *bus) -{ - unsigned long flags; - - if (bus->sdiodev->oob_irq_requested) { - spin_lock_irqsave(&bus->sdiodev->irq_en_lock, flags); - if (!bus->sdiodev->irq_en && !atomic_read(&bus->ipend)) { - enable_irq(bus->sdiodev->pdata->oob_irq_nr); - bus->sdiodev->irq_en = true; - } - spin_unlock_irqrestore(&bus->sdiodev->irq_en_lock, flags); - } -} - -static void atomic_orr(int val, atomic_t *v) -{ - int old_val; - - old_val = atomic_read(v); - while (atomic_cmpxchg(v, old_val, val | old_val) != old_val) - old_val = atomic_read(v); -} - -static int brcmf_sdio_intr_rstatus(struct brcmf_sdio *bus) -{ - struct brcmf_core *buscore; - u32 addr; - unsigned long val; - int ret; - - buscore = brcmf_chip_get_core(bus->ci, BCMA_CORE_SDIO_DEV); - addr = buscore->base + offsetof(struct sdpcmd_regs, intstatus); - - val = brcmf_sdiod_regrl(bus->sdiodev, addr, &ret); - bus->sdcnt.f1regdata++; - if (ret != 0) - return ret; - - val &= bus->hostintmask; - atomic_set(&bus->fcstate, !!(val & I_HMB_FC_STATE)); - - /* Clear interrupts */ - if (val) { - brcmf_sdiod_regwl(bus->sdiodev, addr, val, &ret); - bus->sdcnt.f1regdata++; - atomic_orr(val, &bus->intstatus); - } - - return ret; -} - -static void brcmf_sdio_dpc(struct brcmf_sdio *bus) -{ - u32 newstatus = 0; - unsigned long intstatus; - uint txlimit = bus->txbound; /* Tx frames to send before resched */ - uint framecnt; /* Temporary counter of tx/rx frames */ - int err = 0; - - brcmf_dbg(TRACE, "Enter\n"); - - sdio_claim_host(bus->sdiodev->func[1]); - - /* If waiting for HTAVAIL, check status */ - if (!bus->sr_enabled && bus->clkstate == CLK_PENDING) { - u8 clkctl, devctl = 0; - -#ifdef DEBUG - /* Check for inconsistent device control */ - devctl = brcmf_sdiod_regrb(bus->sdiodev, - SBSDIO_DEVICE_CTL, &err); -#endif /* DEBUG */ - - /* Read CSR, if clock on switch to AVAIL, else ignore */ - clkctl = brcmf_sdiod_regrb(bus->sdiodev, - SBSDIO_FUNC1_CHIPCLKCSR, &err); - - brcmf_dbg(SDIO, "DPC: PENDING, devctl 0x%02x clkctl 0x%02x\n", - devctl, clkctl); - - if (SBSDIO_HTAV(clkctl)) { - devctl = brcmf_sdiod_regrb(bus->sdiodev, - SBSDIO_DEVICE_CTL, &err); - devctl &= ~SBSDIO_DEVCTL_CA_INT_ONLY; - brcmf_sdiod_regwb(bus->sdiodev, SBSDIO_DEVICE_CTL, - devctl, &err); - bus->clkstate = CLK_AVAIL; - } - } - - /* Make sure backplane clock is on */ - brcmf_sdio_bus_sleep(bus, false, true); - - /* Pending interrupt indicates new device status */ - if (atomic_read(&bus->ipend) > 0) { - atomic_set(&bus->ipend, 0); - err = brcmf_sdio_intr_rstatus(bus); - } - - /* Start with leftover status bits */ - intstatus = atomic_xchg(&bus->intstatus, 0); - - /* Handle flow-control change: read new state in case our ack - * crossed another change interrupt. If change still set, assume - * FC ON for safety, let next loop through do the debounce. - */ - if (intstatus & I_HMB_FC_CHANGE) { - intstatus &= ~I_HMB_FC_CHANGE; - err = w_sdreg32(bus, I_HMB_FC_CHANGE, - offsetof(struct sdpcmd_regs, intstatus)); - - err = r_sdreg32(bus, &newstatus, - offsetof(struct sdpcmd_regs, intstatus)); - bus->sdcnt.f1regdata += 2; - atomic_set(&bus->fcstate, - !!(newstatus & (I_HMB_FC_STATE | I_HMB_FC_CHANGE))); - intstatus |= (newstatus & bus->hostintmask); - } - - /* Handle host mailbox indication */ - if (intstatus & I_HMB_HOST_INT) { - intstatus &= ~I_HMB_HOST_INT; - intstatus |= brcmf_sdio_hostmail(bus); - } - - sdio_release_host(bus->sdiodev->func[1]); - - /* Generally don't ask for these, can get CRC errors... */ - if (intstatus & I_WR_OOSYNC) { - brcmf_err("Dongle reports WR_OOSYNC\n"); - intstatus &= ~I_WR_OOSYNC; - } - - if (intstatus & I_RD_OOSYNC) { - brcmf_err("Dongle reports RD_OOSYNC\n"); - intstatus &= ~I_RD_OOSYNC; - } - - if (intstatus & I_SBINT) { - brcmf_err("Dongle reports SBINT\n"); - intstatus &= ~I_SBINT; - } - - /* Would be active due to wake-wlan in gSPI */ - if (intstatus & I_CHIPACTIVE) { - brcmf_dbg(INFO, "Dongle reports CHIPACTIVE\n"); - intstatus &= ~I_CHIPACTIVE; - } - - /* Ignore frame indications if rxskip is set */ - if (bus->rxskip) - intstatus &= ~I_HMB_FRAME_IND; - - /* On frame indication, read available frames */ - if ((intstatus & I_HMB_FRAME_IND) && (bus->clkstate == CLK_AVAIL)) { - brcmf_sdio_readframes(bus, bus->rxbound); - if (!bus->rxpending) - intstatus &= ~I_HMB_FRAME_IND; - } - - /* Keep still-pending events for next scheduling */ - if (intstatus) - atomic_orr(intstatus, &bus->intstatus); - - brcmf_sdio_clrintr(bus); - - if (bus->ctrl_frame_stat && (bus->clkstate == CLK_AVAIL) && - (down_interruptible(&bus->tx_seq_lock) == 0)) { - if (data_ok(bus)) { - sdio_claim_host(bus->sdiodev->func[1]); - err = brcmf_sdio_tx_ctrlframe(bus, bus->ctrl_frame_buf, - bus->ctrl_frame_len); - sdio_release_host(bus->sdiodev->func[1]); - - bus->ctrl_frame_stat = false; - brcmf_sdio_wait_event_wakeup(bus); - } - up(&bus->tx_seq_lock); - } - /* Send queued frames (limit 1 if rx may still be pending) */ - if ((bus->clkstate == CLK_AVAIL) && !atomic_read(&bus->fcstate) && - brcmu_pktq_mlen(&bus->txq, ~bus->flowcontrol) && txlimit && - data_ok(bus)) { - framecnt = bus->rxpending ? min(txlimit, bus->txminmax) : - txlimit; - brcmf_sdio_sendfromq(bus, framecnt); - } - - if (!brcmf_bus_ready(bus->sdiodev->bus_if) || (err != 0)) { - brcmf_err("failed backplane access over SDIO, halting operation\n"); - atomic_set(&bus->intstatus, 0); - } else if (atomic_read(&bus->intstatus) || - atomic_read(&bus->ipend) > 0 || - (!atomic_read(&bus->fcstate) && - brcmu_pktq_mlen(&bus->txq, ~bus->flowcontrol) && - data_ok(bus))) { - atomic_inc(&bus->dpc_tskcnt); - } -} - -static struct pktq *brcmf_sdio_bus_gettxq(struct device *dev) -{ - struct brcmf_bus *bus_if = dev_get_drvdata(dev); - struct brcmf_sdio_dev *sdiodev = bus_if->bus_priv.sdio; - struct brcmf_sdio *bus = sdiodev->bus; - - return &bus->txq; -} - -static int brcmf_sdio_bus_txdata(struct device *dev, struct sk_buff *pkt) -{ - int ret = -EBADE; - uint prec; - struct brcmf_bus *bus_if = dev_get_drvdata(dev); - struct brcmf_sdio_dev *sdiodev = bus_if->bus_priv.sdio; - struct brcmf_sdio *bus = sdiodev->bus; - - brcmf_dbg(TRACE, "Enter: pkt: data %p len %d\n", pkt->data, pkt->len); - - /* Add space for the header */ - skb_push(pkt, bus->tx_hdrlen); - /* precondition: IS_ALIGNED((unsigned long)(pkt->data), 2) */ - - prec = prio2prec((pkt->priority & PRIOMASK)); - - /* Check for existing queue, current flow-control, - pending event, or pending clock */ - brcmf_dbg(TRACE, "deferring pktq len %d\n", pktq_len(&bus->txq)); - bus->sdcnt.fcqueued++; - - /* Priority based enq */ - spin_lock_bh(&bus->txq_lock); - /* reset bus_flags in packet cb */ - *(u16 *)(pkt->cb) = 0; - if (!brcmf_c_prec_enq(bus->sdiodev->dev, &bus->txq, pkt, prec)) { - skb_pull(pkt, bus->tx_hdrlen); - brcmf_err("out of bus->txq !!!\n"); - ret = -ENOSR; - } else { - ret = 0; - } - - if (pktq_len(&bus->txq) >= TXHI) { - bus->txoff = true; - brcmf_txflowblock(bus->sdiodev->dev, true); - } - spin_unlock_bh(&bus->txq_lock); - -#ifdef DEBUG - if (pktq_plen(&bus->txq, prec) > qcount[prec]) - qcount[prec] = pktq_plen(&bus->txq, prec); -#endif - - if (atomic_read(&bus->dpc_tskcnt) == 0) { - atomic_inc(&bus->dpc_tskcnt); - queue_work(bus->brcmf_wq, &bus->datawork); - } - - return ret; -} - -#ifdef DEBUG -#define CONSOLE_LINE_MAX 192 - -static int brcmf_sdio_readconsole(struct brcmf_sdio *bus) -{ - struct brcmf_console *c = &bus->console; - u8 line[CONSOLE_LINE_MAX], ch; - u32 n, idx, addr; - int rv; - - /* Don't do anything until FWREADY updates console address */ - if (bus->console_addr == 0) - return 0; - - /* Read console log struct */ - addr = bus->console_addr + offsetof(struct rte_console, log_le); - rv = brcmf_sdiod_ramrw(bus->sdiodev, false, addr, (u8 *)&c->log_le, - sizeof(c->log_le)); - if (rv < 0) - return rv; - - /* Allocate console buffer (one time only) */ - if (c->buf == NULL) { - c->bufsize = le32_to_cpu(c->log_le.buf_size); - c->buf = kmalloc(c->bufsize, GFP_ATOMIC); - if (c->buf == NULL) - return -ENOMEM; - } - - idx = le32_to_cpu(c->log_le.idx); - - /* Protect against corrupt value */ - if (idx > c->bufsize) - return -EBADE; - - /* Skip reading the console buffer if the index pointer - has not moved */ - if (idx == c->last) - return 0; - - /* Read the console buffer */ - addr = le32_to_cpu(c->log_le.buf); - rv = brcmf_sdiod_ramrw(bus->sdiodev, false, addr, c->buf, c->bufsize); - if (rv < 0) - return rv; - - while (c->last != idx) { - for (n = 0; n < CONSOLE_LINE_MAX - 2; n++) { - if (c->last == idx) { - /* This would output a partial line. - * Instead, back up - * the buffer pointer and output this - * line next time around. - */ - if (c->last >= n) - c->last -= n; - else - c->last = c->bufsize - n; - goto break2; - } - ch = c->buf[c->last]; - c->last = (c->last + 1) % c->bufsize; - if (ch == '\n') - break; - line[n] = ch; - } - - if (n > 0) { - if (line[n - 1] == '\r') - n--; - line[n] = 0; - pr_debug("CONSOLE: %s\n", line); - } - } -break2: - - return 0; -} -#endif /* DEBUG */ - -static int -brcmf_sdio_bus_txctl(struct device *dev, unsigned char *msg, uint msglen) -{ - struct brcmf_bus *bus_if = dev_get_drvdata(dev); - struct brcmf_sdio_dev *sdiodev = bus_if->bus_priv.sdio; - struct brcmf_sdio *bus = sdiodev->bus; - int ret = -1; - - brcmf_dbg(TRACE, "Enter\n"); - - if (down_interruptible(&bus->tx_seq_lock)) - return -EINTR; - - if (!data_ok(bus)) { - brcmf_dbg(INFO, "No bus credit bus->tx_max %d, bus->tx_seq %d\n", - bus->tx_max, bus->tx_seq); - up(&bus->tx_seq_lock); - /* Send from dpc */ - bus->ctrl_frame_buf = msg; - bus->ctrl_frame_len = msglen; - bus->ctrl_frame_stat = true; - - wait_event_interruptible_timeout(bus->ctrl_wait, - !bus->ctrl_frame_stat, - msecs_to_jiffies(2000)); - - if (!bus->ctrl_frame_stat) { - brcmf_dbg(SDIO, "ctrl_frame_stat == false\n"); - ret = 0; - } else { - brcmf_dbg(SDIO, "ctrl_frame_stat == true\n"); - bus->ctrl_frame_stat = false; - if (down_interruptible(&bus->tx_seq_lock)) - return -EINTR; - ret = -1; - } - } - if (ret == -1) { - sdio_claim_host(bus->sdiodev->func[1]); - brcmf_sdio_bus_sleep(bus, false, false); - ret = brcmf_sdio_tx_ctrlframe(bus, msg, msglen); - sdio_release_host(bus->sdiodev->func[1]); - up(&bus->tx_seq_lock); - } - - if (ret) - bus->sdcnt.tx_ctlerrs++; - else - bus->sdcnt.tx_ctlpkts++; - - return ret ? -EIO : 0; -} - -#ifdef DEBUG -static int brcmf_sdio_dump_console(struct seq_file *seq, struct brcmf_sdio *bus, - struct sdpcm_shared *sh) -{ - u32 addr, console_ptr, console_size, console_index; - char *conbuf = NULL; - __le32 sh_val; - int rv; - - /* obtain console information from device memory */ - addr = sh->console_addr + offsetof(struct rte_console, log_le); - rv = brcmf_sdiod_ramrw(bus->sdiodev, false, addr, - (u8 *)&sh_val, sizeof(u32)); - if (rv < 0) - return rv; - console_ptr = le32_to_cpu(sh_val); - - addr = sh->console_addr + offsetof(struct rte_console, log_le.buf_size); - rv = brcmf_sdiod_ramrw(bus->sdiodev, false, addr, - (u8 *)&sh_val, sizeof(u32)); - if (rv < 0) - return rv; - console_size = le32_to_cpu(sh_val); - - addr = sh->console_addr + offsetof(struct rte_console, log_le.idx); - rv = brcmf_sdiod_ramrw(bus->sdiodev, false, addr, - (u8 *)&sh_val, sizeof(u32)); - if (rv < 0) - return rv; - console_index = le32_to_cpu(sh_val); - - /* allocate buffer for console data */ - if (console_size <= CONSOLE_BUFFER_MAX) - conbuf = vzalloc(console_size+1); - - if (!conbuf) - return -ENOMEM; - - /* obtain the console data from device */ - conbuf[console_size] = '\0'; - rv = brcmf_sdiod_ramrw(bus->sdiodev, false, console_ptr, (u8 *)conbuf, - console_size); - if (rv < 0) - goto done; - - rv = seq_write(seq, conbuf + console_index, - console_size - console_index); - if (rv < 0) - goto done; - - if (console_index > 0) - rv = seq_write(seq, conbuf, console_index - 1); - -done: - vfree(conbuf); - return rv; -} - -static int brcmf_sdio_trap_info(struct seq_file *seq, struct brcmf_sdio *bus, - struct sdpcm_shared *sh) -{ - int error; - struct brcmf_trap_info tr; - - if ((sh->flags & SDPCM_SHARED_TRAP) == 0) { - brcmf_dbg(INFO, "no trap in firmware\n"); - return 0; - } - - error = brcmf_sdiod_ramrw(bus->sdiodev, false, sh->trap_addr, (u8 *)&tr, - sizeof(struct brcmf_trap_info)); - if (error < 0) - return error; - - seq_printf(seq, - "dongle trap info: type 0x%x @ epc 0x%08x\n" - " cpsr 0x%08x spsr 0x%08x sp 0x%08x\n" - " lr 0x%08x pc 0x%08x offset 0x%x\n" - " r0 0x%08x r1 0x%08x r2 0x%08x r3 0x%08x\n" - " r4 0x%08x r5 0x%08x r6 0x%08x r7 0x%08x\n", - le32_to_cpu(tr.type), le32_to_cpu(tr.epc), - le32_to_cpu(tr.cpsr), le32_to_cpu(tr.spsr), - le32_to_cpu(tr.r13), le32_to_cpu(tr.r14), - le32_to_cpu(tr.pc), sh->trap_addr, - le32_to_cpu(tr.r0), le32_to_cpu(tr.r1), - le32_to_cpu(tr.r2), le32_to_cpu(tr.r3), - le32_to_cpu(tr.r4), le32_to_cpu(tr.r5), - le32_to_cpu(tr.r6), le32_to_cpu(tr.r7)); - - return 0; -} - -static int brcmf_sdio_assert_info(struct seq_file *seq, struct brcmf_sdio *bus, - struct sdpcm_shared *sh) -{ - int error = 0; - char file[80] = "?"; - char expr[80] = "<???>"; - - if ((sh->flags & SDPCM_SHARED_ASSERT_BUILT) == 0) { - brcmf_dbg(INFO, "firmware not built with -assert\n"); - return 0; - } else if ((sh->flags & SDPCM_SHARED_ASSERT) == 0) { - brcmf_dbg(INFO, "no assert in dongle\n"); - return 0; - } - - sdio_claim_host(bus->sdiodev->func[1]); - if (sh->assert_file_addr != 0) { - error = brcmf_sdiod_ramrw(bus->sdiodev, false, - sh->assert_file_addr, (u8 *)file, 80); - if (error < 0) - return error; - } - if (sh->assert_exp_addr != 0) { - error = brcmf_sdiod_ramrw(bus->sdiodev, false, - sh->assert_exp_addr, (u8 *)expr, 80); - if (error < 0) - return error; - } - sdio_release_host(bus->sdiodev->func[1]); - - seq_printf(seq, "dongle assert: %s:%d: assert(%s)\n", - file, sh->assert_line, expr); - return 0; -} - -static int brcmf_sdio_checkdied(struct brcmf_sdio *bus) -{ - int error; - struct sdpcm_shared sh; - - error = brcmf_sdio_readshared(bus, &sh); - - if (error < 0) - return error; - - if ((sh.flags & SDPCM_SHARED_ASSERT_BUILT) == 0) - brcmf_dbg(INFO, "firmware not built with -assert\n"); - else if (sh.flags & SDPCM_SHARED_ASSERT) - brcmf_err("assertion in dongle\n"); - - if (sh.flags & SDPCM_SHARED_TRAP) - brcmf_err("firmware trap in dongle\n"); - - return 0; -} - -static int brcmf_sdio_died_dump(struct seq_file *seq, struct brcmf_sdio *bus) -{ - int error = 0; - struct sdpcm_shared sh; - - error = brcmf_sdio_readshared(bus, &sh); - if (error < 0) - goto done; - - error = brcmf_sdio_assert_info(seq, bus, &sh); - if (error < 0) - goto done; - - error = brcmf_sdio_trap_info(seq, bus, &sh); - if (error < 0) - goto done; - - error = brcmf_sdio_dump_console(seq, bus, &sh); - -done: - return error; -} - -static int brcmf_sdio_forensic_read(struct seq_file *seq, void *data) -{ - struct brcmf_bus *bus_if = dev_get_drvdata(seq->private); - struct brcmf_sdio *bus = bus_if->bus_priv.sdio->bus; - - return brcmf_sdio_died_dump(seq, bus); -} - -static int brcmf_debugfs_sdio_count_read(struct seq_file *seq, void *data) -{ - struct brcmf_bus *bus_if = dev_get_drvdata(seq->private); - struct brcmf_sdio_dev *sdiodev = bus_if->bus_priv.sdio; - struct brcmf_sdio_count *sdcnt = &sdiodev->bus->sdcnt; - - seq_printf(seq, - "intrcount: %u\nlastintrs: %u\n" - "pollcnt: %u\nregfails: %u\n" - "tx_sderrs: %u\nfcqueued: %u\n" - "rxrtx: %u\nrx_toolong: %u\n" - "rxc_errors: %u\nrx_hdrfail: %u\n" - "rx_badhdr: %u\nrx_badseq: %u\n" - "fc_rcvd: %u\nfc_xoff: %u\n" - "fc_xon: %u\nrxglomfail: %u\n" - "rxglomframes: %u\nrxglompkts: %u\n" - "f2rxhdrs: %u\nf2rxdata: %u\n" - "f2txdata: %u\nf1regdata: %u\n" - "tickcnt: %u\ntx_ctlerrs: %lu\n" - "tx_ctlpkts: %lu\nrx_ctlerrs: %lu\n" - "rx_ctlpkts: %lu\nrx_readahead: %lu\n", - sdcnt->intrcount, sdcnt->lastintrs, - sdcnt->pollcnt, sdcnt->regfails, - sdcnt->tx_sderrs, sdcnt->fcqueued, - sdcnt->rxrtx, sdcnt->rx_toolong, - sdcnt->rxc_errors, sdcnt->rx_hdrfail, - sdcnt->rx_badhdr, sdcnt->rx_badseq, - sdcnt->fc_rcvd, sdcnt->fc_xoff, - sdcnt->fc_xon, sdcnt->rxglomfail, - sdcnt->rxglomframes, sdcnt->rxglompkts, - sdcnt->f2rxhdrs, sdcnt->f2rxdata, - sdcnt->f2txdata, sdcnt->f1regdata, - sdcnt->tickcnt, sdcnt->tx_ctlerrs, - sdcnt->tx_ctlpkts, sdcnt->rx_ctlerrs, - sdcnt->rx_ctlpkts, sdcnt->rx_readahead_cnt); - - return 0; -} - -static void brcmf_sdio_debugfs_create(struct brcmf_sdio *bus) -{ - struct brcmf_pub *drvr = bus->sdiodev->bus_if->drvr; - struct dentry *dentry = brcmf_debugfs_get_devdir(drvr); - - if (IS_ERR_OR_NULL(dentry)) - return; - - brcmf_debugfs_add_entry(drvr, "forensics", brcmf_sdio_forensic_read); - brcmf_debugfs_add_entry(drvr, "counters", - brcmf_debugfs_sdio_count_read); - debugfs_create_u32("console_interval", 0644, dentry, - &bus->console_interval); -} -#else -static int brcmf_sdio_checkdied(struct brcmf_sdio *bus) -{ - return 0; -} - -static void brcmf_sdio_debugfs_create(struct brcmf_sdio *bus) -{ -} -#endif /* DEBUG */ - -static int -brcmf_sdio_bus_rxctl(struct device *dev, unsigned char *msg, uint msglen) -{ - int timeleft; - uint rxlen = 0; - bool pending; - u8 *buf; - struct brcmf_bus *bus_if = dev_get_drvdata(dev); - struct brcmf_sdio_dev *sdiodev = bus_if->bus_priv.sdio; - struct brcmf_sdio *bus = sdiodev->bus; - - brcmf_dbg(TRACE, "Enter\n"); - - /* Wait until control frame is available */ - timeleft = brcmf_sdio_dcmd_resp_wait(bus, &bus->rxlen, &pending); - - spin_lock_bh(&bus->rxctl_lock); - rxlen = bus->rxlen; - memcpy(msg, bus->rxctl, min(msglen, rxlen)); - bus->rxctl = NULL; - buf = bus->rxctl_orig; - bus->rxctl_orig = NULL; - bus->rxlen = 0; - spin_unlock_bh(&bus->rxctl_lock); - vfree(buf); - - if (rxlen) { - brcmf_dbg(CTL, "resumed on rxctl frame, got %d expected %d\n", - rxlen, msglen); - } else if (timeleft == 0) { - brcmf_err("resumed on timeout\n"); - brcmf_sdio_checkdied(bus); - } else if (pending) { - brcmf_dbg(CTL, "cancelled\n"); - return -ERESTARTSYS; - } else { - brcmf_dbg(CTL, "resumed for unknown reason?\n"); - brcmf_sdio_checkdied(bus); - } - - if (rxlen) - bus->sdcnt.rx_ctlpkts++; - else - bus->sdcnt.rx_ctlerrs++; - - return rxlen ? (int)rxlen : -ETIMEDOUT; -} - -#ifdef DEBUG -static bool -brcmf_sdio_verifymemory(struct brcmf_sdio_dev *sdiodev, u32 ram_addr, - u8 *ram_data, uint ram_sz) -{ - char *ram_cmp; - int err; - bool ret = true; - int address; - int offset; - int len; - - /* read back and verify */ - brcmf_dbg(INFO, "Compare RAM dl & ul at 0x%08x; size=%d\n", ram_addr, - ram_sz); - ram_cmp = kmalloc(MEMBLOCK, GFP_KERNEL); - /* do not proceed while no memory but */ - if (!ram_cmp) - return true; - - address = ram_addr; - offset = 0; - while (offset < ram_sz) { - len = ((offset + MEMBLOCK) < ram_sz) ? MEMBLOCK : - ram_sz - offset; - err = brcmf_sdiod_ramrw(sdiodev, false, address, ram_cmp, len); - if (err) { - brcmf_err("error %d on reading %d membytes at 0x%08x\n", - err, len, address); - ret = false; - break; - } else if (memcmp(ram_cmp, &ram_data[offset], len)) { - brcmf_err("Downloaded RAM image is corrupted, block offset is %d, len is %d\n", - offset, len); - ret = false; - break; - } - offset += len; - address += len; - } - - kfree(ram_cmp); - - return ret; -} -#else /* DEBUG */ -static bool -brcmf_sdio_verifymemory(struct brcmf_sdio_dev *sdiodev, u32 ram_addr, - u8 *ram_data, uint ram_sz) -{ - return true; -} -#endif /* DEBUG */ - -static int brcmf_sdio_download_code_file(struct brcmf_sdio *bus, - const struct firmware *fw) -{ - int err; - - brcmf_dbg(TRACE, "Enter\n"); - - err = brcmf_sdiod_ramrw(bus->sdiodev, true, bus->ci->rambase, - (u8 *)fw->data, fw->size); - if (err) - brcmf_err("error %d on writing %d membytes at 0x%08x\n", - err, (int)fw->size, bus->ci->rambase); - else if (!brcmf_sdio_verifymemory(bus->sdiodev, bus->ci->rambase, - (u8 *)fw->data, fw->size)) - err = -EIO; - - return err; -} - -static int brcmf_sdio_download_nvram(struct brcmf_sdio *bus, - void *vars, u32 varsz) -{ - int address; - int err; - - brcmf_dbg(TRACE, "Enter\n"); - - address = bus->ci->ramsize - varsz + bus->ci->rambase; - err = brcmf_sdiod_ramrw(bus->sdiodev, true, address, vars, varsz); - if (err) - brcmf_err("error %d on writing %d nvram bytes at 0x%08x\n", - err, varsz, address); - else if (!brcmf_sdio_verifymemory(bus->sdiodev, address, vars, varsz)) - err = -EIO; - - return err; -} - -static int brcmf_sdio_download_firmware(struct brcmf_sdio *bus, - const struct firmware *fw, - void *nvram, u32 nvlen) -{ - int bcmerror = -EFAULT; - u32 rstvec; - - sdio_claim_host(bus->sdiodev->func[1]); - brcmf_sdio_clkctl(bus, CLK_AVAIL, false); - - /* Keep arm in reset */ - brcmf_chip_enter_download(bus->ci); - - rstvec = get_unaligned_le32(fw->data); - brcmf_dbg(SDIO, "firmware rstvec: %x\n", rstvec); - - bcmerror = brcmf_sdio_download_code_file(bus, fw); - release_firmware(fw); - if (bcmerror) { - brcmf_err("dongle image file download failed\n"); - brcmf_fw_nvram_free(nvram); - goto err; - } - - bcmerror = brcmf_sdio_download_nvram(bus, nvram, nvlen); - brcmf_fw_nvram_free(nvram); - if (bcmerror) { - brcmf_err("dongle nvram file download failed\n"); - goto err; - } - - /* Take arm out of reset */ - if (!brcmf_chip_exit_download(bus->ci, rstvec)) { - brcmf_err("error getting out of ARM core reset\n"); - goto err; - } - - /* Allow HT Clock now that the ARM is running. */ - brcmf_bus_change_state(bus->sdiodev->bus_if, BRCMF_BUS_LOAD); - bcmerror = 0; - -err: - brcmf_sdio_clkctl(bus, CLK_SDONLY, false); - sdio_release_host(bus->sdiodev->func[1]); - return bcmerror; -} - -static void brcmf_sdio_sr_init(struct brcmf_sdio *bus) -{ - int err = 0; - u8 val; - - brcmf_dbg(TRACE, "Enter\n"); - - val = brcmf_sdiod_regrb(bus->sdiodev, SBSDIO_FUNC1_WAKEUPCTRL, &err); - if (err) { - brcmf_err("error reading SBSDIO_FUNC1_WAKEUPCTRL\n"); - return; - } - - val |= 1 << SBSDIO_FUNC1_WCTRL_HTWAIT_SHIFT; - brcmf_sdiod_regwb(bus->sdiodev, SBSDIO_FUNC1_WAKEUPCTRL, val, &err); - if (err) { - brcmf_err("error writing SBSDIO_FUNC1_WAKEUPCTRL\n"); - return; - } - - /* Add CMD14 Support */ - brcmf_sdiod_regwb(bus->sdiodev, SDIO_CCCR_BRCM_CARDCAP, - (SDIO_CCCR_BRCM_CARDCAP_CMD14_SUPPORT | - SDIO_CCCR_BRCM_CARDCAP_CMD14_EXT), - &err); - if (err) { - brcmf_err("error writing SDIO_CCCR_BRCM_CARDCAP\n"); - return; - } - - brcmf_sdiod_regwb(bus->sdiodev, SBSDIO_FUNC1_CHIPCLKCSR, - SBSDIO_FORCE_HT, &err); - if (err) { - brcmf_err("error writing SBSDIO_FUNC1_CHIPCLKCSR\n"); - return; - } - - /* set flag */ - bus->sr_enabled = true; - brcmf_dbg(INFO, "SR enabled\n"); -} - -/* enable KSO bit */ -static int brcmf_sdio_kso_init(struct brcmf_sdio *bus) -{ - u8 val; - int err = 0; - - brcmf_dbg(TRACE, "Enter\n"); - - /* KSO bit added in SDIO core rev 12 */ - if (brcmf_chip_get_core(bus->ci, BCMA_CORE_SDIO_DEV)->rev < 12) - return 0; - - val = brcmf_sdiod_regrb(bus->sdiodev, SBSDIO_FUNC1_SLEEPCSR, &err); - if (err) { - brcmf_err("error reading SBSDIO_FUNC1_SLEEPCSR\n"); - return err; - } - - if (!(val & SBSDIO_FUNC1_SLEEPCSR_KSO_MASK)) { - val |= (SBSDIO_FUNC1_SLEEPCSR_KSO_EN << - SBSDIO_FUNC1_SLEEPCSR_KSO_SHIFT); - brcmf_sdiod_regwb(bus->sdiodev, SBSDIO_FUNC1_SLEEPCSR, - val, &err); - if (err) { - brcmf_err("error writing SBSDIO_FUNC1_SLEEPCSR\n"); - return err; - } - } - - return 0; -} - - -static int brcmf_sdio_bus_preinit(struct device *dev) -{ - struct brcmf_bus *bus_if = dev_get_drvdata(dev); - struct brcmf_sdio_dev *sdiodev = bus_if->bus_priv.sdio; - struct brcmf_sdio *bus = sdiodev->bus; - uint pad_size; - u32 value; - int err; - - /* the commands below use the terms tx and rx from - * a device perspective, ie. bus:txglom affects the - * bus transfers from device to host. - */ - if (brcmf_chip_get_core(bus->ci, BCMA_CORE_SDIO_DEV)->rev < 12) { - /* for sdio core rev < 12, disable txgloming */ - value = 0; - err = brcmf_iovar_data_set(dev, "bus:txglom", &value, - sizeof(u32)); - } else { - /* otherwise, set txglomalign */ - value = 4; - if (sdiodev->pdata) - value = sdiodev->pdata->sd_sgentry_align; - /* SDIO ADMA requires at least 32 bit alignment */ - value = max_t(u32, value, 4); - err = brcmf_iovar_data_set(dev, "bus:txglomalign", &value, - sizeof(u32)); - } - - if (err < 0) - goto done; - - bus->tx_hdrlen = SDPCM_HWHDR_LEN + SDPCM_SWHDR_LEN; - if (sdiodev->sg_support) { - bus->txglom = false; - value = 1; - pad_size = bus->sdiodev->func[2]->cur_blksize << 1; - err = brcmf_iovar_data_set(bus->sdiodev->dev, "bus:rxglom", - &value, sizeof(u32)); - if (err < 0) { - /* bus:rxglom is allowed to fail */ - err = 0; - } else { - bus->txglom = true; - bus->tx_hdrlen += SDPCM_HWEXT_LEN; - } - } - brcmf_bus_add_txhdrlen(bus->sdiodev->dev, bus->tx_hdrlen); - -done: - return err; -} - -void brcmf_sdio_isr(struct brcmf_sdio *bus) -{ - brcmf_dbg(TRACE, "Enter\n"); - - if (!bus) { - brcmf_err("bus is null pointer, exiting\n"); - return; - } - - if (!brcmf_bus_ready(bus->sdiodev->bus_if)) { - brcmf_err("bus is down. we have nothing to do\n"); - return; - } - /* Count the interrupt call */ - bus->sdcnt.intrcount++; - if (in_interrupt()) - atomic_set(&bus->ipend, 1); - else - if (brcmf_sdio_intr_rstatus(bus)) { - brcmf_err("failed backplane access\n"); - } - - /* Disable additional interrupts (is this needed now)? */ - if (!bus->intr) - brcmf_err("isr w/o interrupt configured!\n"); - - atomic_inc(&bus->dpc_tskcnt); - queue_work(bus->brcmf_wq, &bus->datawork); -} - -static bool brcmf_sdio_bus_watchdog(struct brcmf_sdio *bus) -{ -#ifdef DEBUG - struct brcmf_bus *bus_if = dev_get_drvdata(bus->sdiodev->dev); -#endif /* DEBUG */ - - brcmf_dbg(TIMER, "Enter\n"); - - /* Poll period: check device if appropriate. */ - if (!bus->sr_enabled && - bus->poll && (++bus->polltick >= bus->pollrate)) { - u32 intstatus = 0; - - /* Reset poll tick */ - bus->polltick = 0; - - /* Check device if no interrupts */ - if (!bus->intr || - (bus->sdcnt.intrcount == bus->sdcnt.lastintrs)) { - - if (atomic_read(&bus->dpc_tskcnt) == 0) { - u8 devpend; - - sdio_claim_host(bus->sdiodev->func[1]); - devpend = brcmf_sdiod_regrb(bus->sdiodev, - SDIO_CCCR_INTx, - NULL); - sdio_release_host(bus->sdiodev->func[1]); - intstatus = - devpend & (INTR_STATUS_FUNC1 | - INTR_STATUS_FUNC2); - } - - /* If there is something, make like the ISR and - schedule the DPC */ - if (intstatus) { - bus->sdcnt.pollcnt++; - atomic_set(&bus->ipend, 1); - - atomic_inc(&bus->dpc_tskcnt); - queue_work(bus->brcmf_wq, &bus->datawork); - } - } - - /* Update interrupt tracking */ - bus->sdcnt.lastintrs = bus->sdcnt.intrcount; - } -#ifdef DEBUG - /* Poll for console output periodically */ - if (bus_if && bus_if->state == BRCMF_BUS_DATA && - bus->console_interval != 0) { - bus->console.count += BRCMF_WD_POLL_MS; - if (bus->console.count >= bus->console_interval) { - bus->console.count -= bus->console_interval; - sdio_claim_host(bus->sdiodev->func[1]); - /* Make sure backplane clock is on */ - brcmf_sdio_bus_sleep(bus, false, false); - if (brcmf_sdio_readconsole(bus) < 0) - /* stop on error */ - bus->console_interval = 0; - sdio_release_host(bus->sdiodev->func[1]); - } - } -#endif /* DEBUG */ - - /* On idle timeout clear activity flag and/or turn off clock */ - if ((bus->idletime > 0) && (bus->clkstate == CLK_AVAIL)) { - if (++bus->idlecount >= bus->idletime) { - bus->idlecount = 0; - if (bus->activity) { - bus->activity = false; - brcmf_sdio_wd_timer(bus, BRCMF_WD_POLL_MS); - } else { - brcmf_dbg(SDIO, "idle\n"); - sdio_claim_host(bus->sdiodev->func[1]); - brcmf_sdio_bus_sleep(bus, true, false); - sdio_release_host(bus->sdiodev->func[1]); - } - } - } - - return (atomic_read(&bus->ipend) > 0); -} - -static void brcmf_sdio_dataworker(struct work_struct *work) -{ - struct brcmf_sdio *bus = container_of(work, struct brcmf_sdio, - datawork); - - while (atomic_read(&bus->dpc_tskcnt)) { - atomic_set(&bus->dpc_tskcnt, 0); - brcmf_sdio_dpc(bus); - } -} - -static void -brcmf_sdio_drivestrengthinit(struct brcmf_sdio_dev *sdiodev, - struct brcmf_chip *ci, u32 drivestrength) -{ - const struct sdiod_drive_str *str_tab = NULL; - u32 str_mask; - u32 str_shift; - u32 base; - u32 i; - u32 drivestrength_sel = 0; - u32 cc_data_temp; - u32 addr; - - if (!(ci->cc_caps & CC_CAP_PMU)) - return; - - switch (SDIOD_DRVSTR_KEY(ci->chip, ci->pmurev)) { - case SDIOD_DRVSTR_KEY(BRCM_CC_4330_CHIP_ID, 12): - str_tab = sdiod_drvstr_tab1_1v8; - str_mask = 0x00003800; - str_shift = 11; - break; - case SDIOD_DRVSTR_KEY(BRCM_CC_4334_CHIP_ID, 17): - str_tab = sdiod_drvstr_tab6_1v8; - str_mask = 0x00001800; - str_shift = 11; - break; - case SDIOD_DRVSTR_KEY(BRCM_CC_43143_CHIP_ID, 17): - /* note: 43143 does not support tristate */ - i = ARRAY_SIZE(sdiod_drvstr_tab2_3v3) - 1; - if (drivestrength >= sdiod_drvstr_tab2_3v3[i].strength) { - str_tab = sdiod_drvstr_tab2_3v3; - str_mask = 0x00000007; - str_shift = 0; - } else - brcmf_err("Invalid SDIO Drive strength for chip %s, strength=%d\n", - ci->name, drivestrength); - break; - case SDIOD_DRVSTR_KEY(BRCM_CC_43362_CHIP_ID, 13): - str_tab = sdiod_drive_strength_tab5_1v8; - str_mask = 0x00003800; - str_shift = 11; - break; - default: - brcmf_err("No SDIO Drive strength init done for chip %s rev %d pmurev %d\n", - ci->name, ci->chiprev, ci->pmurev); - break; - } - - if (str_tab != NULL) { - for (i = 0; str_tab[i].strength != 0; i++) { - if (drivestrength >= str_tab[i].strength) { - drivestrength_sel = str_tab[i].sel; - break; - } - } - base = brcmf_chip_get_chipcommon(ci)->base; - addr = CORE_CC_REG(base, chipcontrol_addr); - brcmf_sdiod_regwl(sdiodev, addr, 1, NULL); - cc_data_temp = brcmf_sdiod_regrl(sdiodev, addr, NULL); - cc_data_temp &= ~str_mask; - drivestrength_sel <<= str_shift; - cc_data_temp |= drivestrength_sel; - brcmf_sdiod_regwl(sdiodev, addr, cc_data_temp, NULL); - - brcmf_dbg(INFO, "SDIO: %d mA (req=%d mA) drive strength selected, set to 0x%08x\n", - str_tab[i].strength, drivestrength, cc_data_temp); - } -} - -static int brcmf_sdio_buscoreprep(void *ctx) -{ - struct brcmf_sdio_dev *sdiodev = ctx; - int err = 0; - u8 clkval, clkset; - - /* Try forcing SDIO core to do ALPAvail request only */ - clkset = SBSDIO_FORCE_HW_CLKREQ_OFF | SBSDIO_ALP_AVAIL_REQ; - brcmf_sdiod_regwb(sdiodev, SBSDIO_FUNC1_CHIPCLKCSR, clkset, &err); - if (err) { - brcmf_err("error writing for HT off\n"); - return err; - } - - /* If register supported, wait for ALPAvail and then force ALP */ - /* This may take up to 15 milliseconds */ - clkval = brcmf_sdiod_regrb(sdiodev, - SBSDIO_FUNC1_CHIPCLKCSR, NULL); - - if ((clkval & ~SBSDIO_AVBITS) != clkset) { - brcmf_err("ChipClkCSR access: wrote 0x%02x read 0x%02x\n", - clkset, clkval); - return -EACCES; - } - - SPINWAIT(((clkval = brcmf_sdiod_regrb(sdiodev, - SBSDIO_FUNC1_CHIPCLKCSR, NULL)), - !SBSDIO_ALPAV(clkval)), - PMU_MAX_TRANSITION_DLY); - if (!SBSDIO_ALPAV(clkval)) { - brcmf_err("timeout on ALPAV wait, clkval 0x%02x\n", - clkval); - return -EBUSY; - } - - clkset = SBSDIO_FORCE_HW_CLKREQ_OFF | SBSDIO_FORCE_ALP; - brcmf_sdiod_regwb(sdiodev, SBSDIO_FUNC1_CHIPCLKCSR, clkset, &err); - udelay(65); - - /* Also, disable the extra SDIO pull-ups */ - brcmf_sdiod_regwb(sdiodev, SBSDIO_FUNC1_SDIOPULLUP, 0, NULL); - - return 0; -} - -static void brcmf_sdio_buscore_exitdl(void *ctx, struct brcmf_chip *chip, - u32 rstvec) -{ - struct brcmf_sdio_dev *sdiodev = ctx; - struct brcmf_core *core; - u32 reg_addr; - - /* clear all interrupts */ - core = brcmf_chip_get_core(chip, BCMA_CORE_SDIO_DEV); - reg_addr = core->base + offsetof(struct sdpcmd_regs, intstatus); - brcmf_sdiod_regwl(sdiodev, reg_addr, 0xFFFFFFFF, NULL); - - if (rstvec) - /* Write reset vector to address 0 */ - brcmf_sdiod_ramrw(sdiodev, true, 0, (void *)&rstvec, - sizeof(rstvec)); -} - -static u32 brcmf_sdio_buscore_read32(void *ctx, u32 addr) -{ - struct brcmf_sdio_dev *sdiodev = ctx; - u32 val, rev; - - val = brcmf_sdiod_regrl(sdiodev, addr, NULL); - if (sdiodev->func[0]->device == BRCM_SDIO_4335_4339_DEVICE_ID && - addr == CORE_CC_REG(SI_ENUM_BASE, chipid)) { - rev = (val & CID_REV_MASK) >> CID_REV_SHIFT; - if (rev >= 2) { - val &= ~CID_ID_MASK; - val |= BRCM_CC_4339_CHIP_ID; - } - } - return val; -} - -static void brcmf_sdio_buscore_write32(void *ctx, u32 addr, u32 val) -{ - struct brcmf_sdio_dev *sdiodev = ctx; - - brcmf_sdiod_regwl(sdiodev, addr, val, NULL); -} - -static const struct brcmf_buscore_ops brcmf_sdio_buscore_ops = { - .prepare = brcmf_sdio_buscoreprep, - .exit_dl = brcmf_sdio_buscore_exitdl, - .read32 = brcmf_sdio_buscore_read32, - .write32 = brcmf_sdio_buscore_write32, -}; - -static bool -brcmf_sdio_probe_attach(struct brcmf_sdio *bus) -{ - u8 clkctl = 0; - int err = 0; - int reg_addr; - u32 reg_val; - u32 drivestrength; - - sdio_claim_host(bus->sdiodev->func[1]); - - pr_debug("F1 signature read @0x18000000=0x%4x\n", - brcmf_sdiod_regrl(bus->sdiodev, SI_ENUM_BASE, NULL)); - - /* - * Force PLL off until brcmf_chip_attach() - * programs PLL control regs - */ - - brcmf_sdiod_regwb(bus->sdiodev, SBSDIO_FUNC1_CHIPCLKCSR, - BRCMF_INIT_CLKCTL1, &err); - if (!err) - clkctl = brcmf_sdiod_regrb(bus->sdiodev, - SBSDIO_FUNC1_CHIPCLKCSR, &err); - - if (err || ((clkctl & ~SBSDIO_AVBITS) != BRCMF_INIT_CLKCTL1)) { - brcmf_err("ChipClkCSR access: err %d wrote 0x%02x read 0x%02x\n", - err, BRCMF_INIT_CLKCTL1, clkctl); - goto fail; - } - - /* SDIO register access works so moving - * state from UNKNOWN to DOWN. - */ - brcmf_bus_change_state(bus->sdiodev->bus_if, BRCMF_BUS_DOWN); - - bus->ci = brcmf_chip_attach(bus->sdiodev, &brcmf_sdio_buscore_ops); - if (IS_ERR(bus->ci)) { - brcmf_err("brcmf_chip_attach failed!\n"); - bus->ci = NULL; - goto fail; - } - - if (brcmf_sdio_kso_init(bus)) { - brcmf_err("error enabling KSO\n"); - goto fail; - } - - if ((bus->sdiodev->pdata) && (bus->sdiodev->pdata->drive_strength)) - drivestrength = bus->sdiodev->pdata->drive_strength; - else - drivestrength = DEFAULT_SDIO_DRIVE_STRENGTH; - brcmf_sdio_drivestrengthinit(bus->sdiodev, bus->ci, drivestrength); - - /* Get info on the SOCRAM cores... */ - bus->ramsize = bus->ci->ramsize; - if (!(bus->ramsize)) { - brcmf_err("failed to find SOCRAM memory!\n"); - goto fail; - } - - /* Set card control so an SDIO card reset does a WLAN backplane reset */ - reg_val = brcmf_sdiod_regrb(bus->sdiodev, - SDIO_CCCR_BRCM_CARDCTRL, &err); - if (err) - goto fail; - - reg_val |= SDIO_CCCR_BRCM_CARDCTRL_WLANRESET; - - brcmf_sdiod_regwb(bus->sdiodev, - SDIO_CCCR_BRCM_CARDCTRL, reg_val, &err); - if (err) - goto fail; - - /* set PMUControl so a backplane reset does PMU state reload */ - reg_addr = CORE_CC_REG(brcmf_chip_get_chipcommon(bus->ci)->base, - pmucontrol); - reg_val = brcmf_sdiod_regrl(bus->sdiodev, reg_addr, &err); - if (err) - goto fail; - - reg_val |= (BCMA_CC_PMU_CTL_RES_RELOAD << BCMA_CC_PMU_CTL_RES_SHIFT); - - brcmf_sdiod_regwl(bus->sdiodev, reg_addr, reg_val, &err); - if (err) - goto fail; - - sdio_release_host(bus->sdiodev->func[1]); - - brcmu_pktq_init(&bus->txq, (PRIOMASK + 1), TXQLEN); - - /* allocate header buffer */ - bus->hdrbuf = kzalloc(MAX_HDR_READ + bus->head_align, GFP_KERNEL); - if (!bus->hdrbuf) - return false; - /* Locate an appropriately-aligned portion of hdrbuf */ - bus->rxhdr = (u8 *) roundup((unsigned long)&bus->hdrbuf[0], - bus->head_align); - - /* Set the poll and/or interrupt flags */ - bus->intr = true; - bus->poll = false; - if (bus->poll) - bus->pollrate = 1; - - return true; - -fail: - sdio_release_host(bus->sdiodev->func[1]); - return false; -} - -static int -brcmf_sdio_watchdog_thread(void *data) -{ - struct brcmf_sdio *bus = (struct brcmf_sdio *)data; - - allow_signal(SIGTERM); - /* Run until signal received */ - while (1) { - if (kthread_should_stop()) - break; - if (!wait_for_completion_interruptible(&bus->watchdog_wait)) { - brcmf_sdio_bus_watchdog(bus); - /* Count the tick for reference */ - bus->sdcnt.tickcnt++; - reinit_completion(&bus->watchdog_wait); - } else - break; - } - return 0; -} - -static void -brcmf_sdio_watchdog(unsigned long data) -{ - struct brcmf_sdio *bus = (struct brcmf_sdio *)data; - - if (bus->watchdog_tsk) { - complete(&bus->watchdog_wait); - /* Reschedule the watchdog */ - if (bus->wd_timer_valid) - mod_timer(&bus->timer, - jiffies + BRCMF_WD_POLL_MS * HZ / 1000); - } -} - -static struct brcmf_bus_ops brcmf_sdio_bus_ops = { - .stop = brcmf_sdio_bus_stop, - .preinit = brcmf_sdio_bus_preinit, - .txdata = brcmf_sdio_bus_txdata, - .txctl = brcmf_sdio_bus_txctl, - .rxctl = brcmf_sdio_bus_rxctl, - .gettxq = brcmf_sdio_bus_gettxq, - .wowl_config = brcmf_sdio_wowl_config -}; - -static void brcmf_sdio_firmware_callback(struct device *dev, - const struct firmware *code, - void *nvram, u32 nvram_len) -{ - struct brcmf_bus *bus_if = dev_get_drvdata(dev); - struct brcmf_sdio_dev *sdiodev = bus_if->bus_priv.sdio; - struct brcmf_sdio *bus = sdiodev->bus; - int err = 0; - u8 saveclk; - - brcmf_dbg(TRACE, "Enter: dev=%s\n", dev_name(dev)); - - /* try to download image and nvram to the dongle */ - if (bus_if->state == BRCMF_BUS_DOWN) { - bus->alp_only = true; - err = brcmf_sdio_download_firmware(bus, code, nvram, nvram_len); - if (err) - goto fail; - bus->alp_only = false; - } - - if (!bus_if->drvr) - return; - - /* Start the watchdog timer */ - bus->sdcnt.tickcnt = 0; - brcmf_sdio_wd_timer(bus, BRCMF_WD_POLL_MS); - - sdio_claim_host(sdiodev->func[1]); - - /* Make sure backplane clock is on, needed to generate F2 interrupt */ - brcmf_sdio_clkctl(bus, CLK_AVAIL, false); - if (bus->clkstate != CLK_AVAIL) - goto release; - - /* Force clocks on backplane to be sure F2 interrupt propagates */ - saveclk = brcmf_sdiod_regrb(sdiodev, SBSDIO_FUNC1_CHIPCLKCSR, &err); - if (!err) { - brcmf_sdiod_regwb(sdiodev, SBSDIO_FUNC1_CHIPCLKCSR, - (saveclk | SBSDIO_FORCE_HT), &err); - } - if (err) { - brcmf_err("Failed to force clock for F2: err %d\n", err); - goto release; - } - - /* Enable function 2 (frame transfers) */ - w_sdreg32(bus, SDPCM_PROT_VERSION << SMB_DATA_VERSION_SHIFT, - offsetof(struct sdpcmd_regs, tosbmailboxdata)); - err = sdio_enable_func(sdiodev->func[SDIO_FUNC_2]); - - - brcmf_dbg(INFO, "enable F2: err=%d\n", err); - - /* If F2 successfully enabled, set core and enable interrupts */ - if (!err) { - /* Set up the interrupt mask and enable interrupts */ - bus->hostintmask = HOSTINTMASK; - w_sdreg32(bus, bus->hostintmask, - offsetof(struct sdpcmd_regs, hostintmask)); - - brcmf_sdiod_regwb(sdiodev, SBSDIO_WATERMARK, 8, &err); - } else { - /* Disable F2 again */ - sdio_disable_func(sdiodev->func[SDIO_FUNC_2]); - goto release; - } - - if (brcmf_chip_sr_capable(bus->ci)) { - brcmf_sdio_sr_init(bus); - } else { - /* Restore previous clock setting */ - brcmf_sdiod_regwb(sdiodev, SBSDIO_FUNC1_CHIPCLKCSR, - saveclk, &err); - } - - if (err == 0) { - err = brcmf_sdiod_intr_register(sdiodev); - if (err != 0) - brcmf_err("intr register failed:%d\n", err); - } - - /* If we didn't come up, turn off backplane clock */ - if (err != 0) - brcmf_sdio_clkctl(bus, CLK_NONE, false); - - sdio_release_host(sdiodev->func[1]); - - err = brcmf_bus_start(dev); - if (err != 0) { - brcmf_err("dongle is not responding\n"); - goto fail; - } - return; - -release: - sdio_release_host(sdiodev->func[1]); -fail: - brcmf_dbg(TRACE, "failed: dev=%s, err=%d\n", dev_name(dev), err); - device_release_driver(dev); -} - -struct brcmf_sdio *brcmf_sdio_probe(struct brcmf_sdio_dev *sdiodev) -{ - int ret; - struct brcmf_sdio *bus; - - brcmf_dbg(TRACE, "Enter\n"); - - /* Allocate private bus interface state */ - bus = kzalloc(sizeof(struct brcmf_sdio), GFP_ATOMIC); - if (!bus) - goto fail; - - bus->sdiodev = sdiodev; - sdiodev->bus = bus; - skb_queue_head_init(&bus->glom); - bus->txbound = BRCMF_TXBOUND; - bus->rxbound = BRCMF_RXBOUND; - bus->txminmax = BRCMF_TXMINMAX; - bus->tx_seq = SDPCM_SEQ_WRAP - 1; - - /* platform specific configuration: - * alignments must be at least 4 bytes for ADMA - */ - bus->head_align = ALIGNMENT; - bus->sgentry_align = ALIGNMENT; - if (sdiodev->pdata) { - if (sdiodev->pdata->sd_head_align > ALIGNMENT) - bus->head_align = sdiodev->pdata->sd_head_align; - if (sdiodev->pdata->sd_sgentry_align > ALIGNMENT) - bus->sgentry_align = sdiodev->pdata->sd_sgentry_align; - } - - INIT_WORK(&bus->datawork, brcmf_sdio_dataworker); - bus->brcmf_wq = create_singlethread_workqueue("brcmf_wq"); - if (bus->brcmf_wq == NULL) { - brcmf_err("insufficient memory to create txworkqueue\n"); - goto fail; - } - - /* attempt to attach to the dongle */ - if (!(brcmf_sdio_probe_attach(bus))) { - brcmf_err("brcmf_sdio_probe_attach failed\n"); - goto fail; - } - - spin_lock_init(&bus->rxctl_lock); - spin_lock_init(&bus->txq_lock); - sema_init(&bus->tx_seq_lock, 1); - init_waitqueue_head(&bus->ctrl_wait); - init_waitqueue_head(&bus->dcmd_resp_wait); - - /* Set up the watchdog timer */ - init_timer(&bus->timer); - bus->timer.data = (unsigned long)bus; - bus->timer.function = brcmf_sdio_watchdog; - - /* Initialize watchdog thread */ - init_completion(&bus->watchdog_wait); - bus->watchdog_tsk = kthread_run(brcmf_sdio_watchdog_thread, - bus, "brcmf_watchdog"); - if (IS_ERR(bus->watchdog_tsk)) { - pr_warn("brcmf_watchdog thread failed to start\n"); - bus->watchdog_tsk = NULL; - } - /* Initialize DPC thread */ - atomic_set(&bus->dpc_tskcnt, 0); - - /* Assign bus interface call back */ - bus->sdiodev->bus_if->dev = bus->sdiodev->dev; - bus->sdiodev->bus_if->ops = &brcmf_sdio_bus_ops; - bus->sdiodev->bus_if->chip = bus->ci->chip; - bus->sdiodev->bus_if->chiprev = bus->ci->chiprev; - - /* default sdio bus header length for tx packet */ - bus->tx_hdrlen = SDPCM_HWHDR_LEN + SDPCM_SWHDR_LEN; - - /* Attach to the common layer, reserve hdr space */ - ret = brcmf_attach(bus->sdiodev->dev); - if (ret != 0) { - brcmf_err("brcmf_attach failed\n"); - goto fail; - } - - /* Query the F2 block size, set roundup accordingly */ - bus->blocksize = bus->sdiodev->func[2]->cur_blksize; - bus->roundup = min(max_roundup, bus->blocksize); - - /* Allocate buffers */ - if (bus->sdiodev->bus_if->maxctl) { - bus->sdiodev->bus_if->maxctl += bus->roundup; - bus->rxblen = - roundup((bus->sdiodev->bus_if->maxctl + SDPCM_HDRLEN), - ALIGNMENT) + bus->head_align; - bus->rxbuf = kmalloc(bus->rxblen, GFP_ATOMIC); - if (!(bus->rxbuf)) { - brcmf_err("rxbuf allocation failed\n"); - goto fail; - } - } - - sdio_claim_host(bus->sdiodev->func[1]); - - /* Disable F2 to clear any intermediate frame state on the dongle */ - sdio_disable_func(bus->sdiodev->func[SDIO_FUNC_2]); - - bus->rxflow = false; - - /* Done with backplane-dependent accesses, can drop clock... */ - brcmf_sdiod_regwb(bus->sdiodev, SBSDIO_FUNC1_CHIPCLKCSR, 0, NULL); - - sdio_release_host(bus->sdiodev->func[1]); - - /* ...and initialize clock/power states */ - bus->clkstate = CLK_SDONLY; - bus->idletime = BRCMF_IDLE_INTERVAL; - bus->idleclock = BRCMF_IDLE_ACTIVE; - - /* SR state */ - bus->sleeping = false; - bus->sr_enabled = false; - - brcmf_sdio_debugfs_create(bus); - brcmf_dbg(INFO, "completed!!\n"); - - ret = brcmf_sdio_get_fwnames(bus->ci, sdiodev); - if (ret) - goto fail; - - ret = brcmf_fw_get_firmwares(sdiodev->dev, BRCMF_FW_REQUEST_NVRAM, - sdiodev->fw_name, sdiodev->nvram_name, - brcmf_sdio_firmware_callback); - if (ret != 0) { - brcmf_err("async firmware request failed: %d\n", ret); - goto fail; - } - - return bus; - -fail: - brcmf_sdio_remove(bus); - return NULL; -} - -/* Detach and free everything */ -void brcmf_sdio_remove(struct brcmf_sdio *bus) -{ - brcmf_dbg(TRACE, "Enter\n"); - - if (bus) { - /* De-register interrupt handler */ - brcmf_sdiod_intr_unregister(bus->sdiodev); - - brcmf_detach(bus->sdiodev->dev); - - cancel_work_sync(&bus->datawork); - if (bus->brcmf_wq) - destroy_workqueue(bus->brcmf_wq); - - if (bus->ci) { - if (bus->sdiodev->bus_if->state == BRCMF_BUS_DOWN) { - sdio_claim_host(bus->sdiodev->func[1]); - brcmf_sdio_clkctl(bus, CLK_AVAIL, false); - /* Leave the device in state where it is - * 'quiet'. This is done by putting it in - * download_state which essentially resets - * all necessary cores. - */ - msleep(20); - brcmf_chip_enter_download(bus->ci); - brcmf_sdio_clkctl(bus, CLK_NONE, false); - sdio_release_host(bus->sdiodev->func[1]); - } - brcmf_chip_detach(bus->ci); - } - - kfree(bus->rxbuf); - kfree(bus->hdrbuf); - kfree(bus); - } - - brcmf_dbg(TRACE, "Disconnected\n"); -} - -void brcmf_sdio_wd_timer(struct brcmf_sdio *bus, uint wdtick) -{ - /* Totally stop the timer */ - if (!wdtick && bus->wd_timer_valid) { - del_timer_sync(&bus->timer); - bus->wd_timer_valid = false; - bus->save_ms = wdtick; - return; - } - - /* don't start the wd until fw is loaded */ - if (bus->sdiodev->bus_if->state != BRCMF_BUS_DATA) - return; - - if (wdtick) { - if (bus->save_ms != BRCMF_WD_POLL_MS) { - if (bus->wd_timer_valid) - /* Stop timer and restart at new value */ - del_timer_sync(&bus->timer); - - /* Create timer again when watchdog period is - dynamically changed or in the first instance - */ - bus->timer.expires = - jiffies + BRCMF_WD_POLL_MS * HZ / 1000; - add_timer(&bus->timer); - - } else { - /* Re arm the timer, at last watchdog period */ - mod_timer(&bus->timer, - jiffies + BRCMF_WD_POLL_MS * HZ / 1000); - } - - bus->wd_timer_valid = true; - bus->save_ms = wdtick; - } -} |