diff options
Diffstat (limited to 'drivers/mmc/host/atmel-mci.c')
| -rw-r--r-- | drivers/mmc/host/atmel-mci.c | 183 |
1 files changed, 179 insertions, 4 deletions
diff --git a/drivers/mmc/host/atmel-mci.c b/drivers/mmc/host/atmel-mci.c index bf62e429f7fc..851ccd9ac868 100644 --- a/drivers/mmc/host/atmel-mci.c +++ b/drivers/mmc/host/atmel-mci.c @@ -29,7 +29,6 @@ #include <linux/slab.h> #include <linux/stat.h> #include <linux/types.h> -#include <linux/platform_data/mmc-atmel-mci.h> #include <linux/mmc/host.h> #include <linux/mmc/sdio.h> @@ -44,7 +43,141 @@ #include <asm/io.h> #include <asm/unaligned.h> -#include "atmel-mci-regs.h" +/* + * Superset of MCI IP registers integrated in Atmel AVR32 and AT91 Processors + * Registers and bitfields marked with [2] are only available in MCI2 + */ + +/* MCI Register Definitions */ +#define ATMCI_CR 0x0000 /* Control */ +#define ATMCI_CR_MCIEN BIT(0) /* MCI Enable */ +#define ATMCI_CR_MCIDIS BIT(1) /* MCI Disable */ +#define ATMCI_CR_PWSEN BIT(2) /* Power Save Enable */ +#define ATMCI_CR_PWSDIS BIT(3) /* Power Save Disable */ +#define ATMCI_CR_SWRST BIT(7) /* Software Reset */ +#define ATMCI_MR 0x0004 /* Mode */ +#define ATMCI_MR_CLKDIV(x) ((x) << 0) /* Clock Divider */ +#define ATMCI_MR_PWSDIV(x) ((x) << 8) /* Power Saving Divider */ +#define ATMCI_MR_RDPROOF BIT(11) /* Read Proof */ +#define ATMCI_MR_WRPROOF BIT(12) /* Write Proof */ +#define ATMCI_MR_PDCFBYTE BIT(13) /* Force Byte Transfer */ +#define ATMCI_MR_PDCPADV BIT(14) /* Padding Value */ +#define ATMCI_MR_PDCMODE BIT(15) /* PDC-oriented Mode */ +#define ATMCI_MR_CLKODD(x) ((x) << 16) /* LSB of Clock Divider */ +#define ATMCI_DTOR 0x0008 /* Data Timeout */ +#define ATMCI_DTOCYC(x) ((x) << 0) /* Data Timeout Cycles */ +#define ATMCI_DTOMUL(x) ((x) << 4) /* Data Timeout Multiplier */ +#define ATMCI_SDCR 0x000c /* SD Card / SDIO */ +#define ATMCI_SDCSEL_SLOT_A (0 << 0) /* Select SD slot A */ +#define ATMCI_SDCSEL_SLOT_B (1 << 0) /* Select SD slot A */ +#define ATMCI_SDCSEL_MASK (3 << 0) +#define ATMCI_SDCBUS_1BIT (0 << 6) /* 1-bit data bus */ +#define ATMCI_SDCBUS_4BIT (2 << 6) /* 4-bit data bus */ +#define ATMCI_SDCBUS_8BIT (3 << 6) /* 8-bit data bus[2] */ +#define ATMCI_SDCBUS_MASK (3 << 6) +#define ATMCI_ARGR 0x0010 /* Command Argument */ +#define ATMCI_CMDR 0x0014 /* Command */ +#define ATMCI_CMDR_CMDNB(x) ((x) << 0) /* Command Opcode */ +#define ATMCI_CMDR_RSPTYP_NONE (0 << 6) /* No response */ +#define ATMCI_CMDR_RSPTYP_48BIT (1 << 6) /* 48-bit response */ +#define ATMCI_CMDR_RSPTYP_136BIT (2 << 6) /* 136-bit response */ +#define ATMCI_CMDR_SPCMD_INIT (1 << 8) /* Initialization command */ +#define ATMCI_CMDR_SPCMD_SYNC (2 << 8) /* Synchronized command */ +#define ATMCI_CMDR_SPCMD_INT (4 << 8) /* Interrupt command */ +#define ATMCI_CMDR_SPCMD_INTRESP (5 << 8) /* Interrupt response */ +#define ATMCI_CMDR_OPDCMD (1 << 11) /* Open Drain */ +#define ATMCI_CMDR_MAXLAT_5CYC (0 << 12) /* Max latency 5 cycles */ +#define ATMCI_CMDR_MAXLAT_64CYC (1 << 12) /* Max latency 64 cycles */ +#define ATMCI_CMDR_START_XFER (1 << 16) /* Start data transfer */ +#define ATMCI_CMDR_STOP_XFER (2 << 16) /* Stop data transfer */ +#define ATMCI_CMDR_TRDIR_WRITE (0 << 18) /* Write data */ +#define ATMCI_CMDR_TRDIR_READ (1 << 18) /* Read data */ +#define ATMCI_CMDR_BLOCK (0 << 19) /* Single-block transfer */ +#define ATMCI_CMDR_MULTI_BLOCK (1 << 19) /* Multi-block transfer */ +#define ATMCI_CMDR_STREAM (2 << 19) /* MMC Stream transfer */ +#define ATMCI_CMDR_SDIO_BYTE (4 << 19) /* SDIO Byte transfer */ +#define ATMCI_CMDR_SDIO_BLOCK (5 << 19) /* SDIO Block transfer */ +#define ATMCI_CMDR_SDIO_SUSPEND (1 << 24) /* SDIO Suspend Command */ +#define ATMCI_CMDR_SDIO_RESUME (2 << 24) /* SDIO Resume Command */ +#define ATMCI_BLKR 0x0018 /* Block */ +#define ATMCI_BCNT(x) ((x) << 0) /* Data Block Count */ +#define ATMCI_BLKLEN(x) ((x) << 16) /* Data Block Length */ +#define ATMCI_CSTOR 0x001c /* Completion Signal Timeout[2] */ +#define ATMCI_CSTOCYC(x) ((x) << 0) /* CST cycles */ +#define ATMCI_CSTOMUL(x) ((x) << 4) /* CST multiplier */ +#define ATMCI_RSPR 0x0020 /* Response 0 */ +#define ATMCI_RSPR1 0x0024 /* Response 1 */ +#define ATMCI_RSPR2 0x0028 /* Response 2 */ +#define ATMCI_RSPR3 0x002c /* Response 3 */ +#define ATMCI_RDR 0x0030 /* Receive Data */ +#define ATMCI_TDR 0x0034 /* Transmit Data */ +#define ATMCI_SR 0x0040 /* Status */ +#define ATMCI_IER 0x0044 /* Interrupt Enable */ +#define ATMCI_IDR 0x0048 /* Interrupt Disable */ +#define ATMCI_IMR 0x004c /* Interrupt Mask */ +#define ATMCI_CMDRDY BIT(0) /* Command Ready */ +#define ATMCI_RXRDY BIT(1) /* Receiver Ready */ +#define ATMCI_TXRDY BIT(2) /* Transmitter Ready */ +#define ATMCI_BLKE BIT(3) /* Data Block Ended */ +#define ATMCI_DTIP BIT(4) /* Data Transfer In Progress */ +#define ATMCI_NOTBUSY BIT(5) /* Data Not Busy */ +#define ATMCI_ENDRX BIT(6) /* End of RX Buffer */ +#define ATMCI_ENDTX BIT(7) /* End of TX Buffer */ +#define ATMCI_SDIOIRQA BIT(8) /* SDIO IRQ in slot A */ +#define ATMCI_SDIOIRQB BIT(9) /* SDIO IRQ in slot B */ +#define ATMCI_SDIOWAIT BIT(12) /* SDIO Read Wait Operation Status */ +#define ATMCI_CSRCV BIT(13) /* CE-ATA Completion Signal Received */ +#define ATMCI_RXBUFF BIT(14) /* RX Buffer Full */ +#define ATMCI_TXBUFE BIT(15) /* TX Buffer Empty */ +#define ATMCI_RINDE BIT(16) /* Response Index Error */ +#define ATMCI_RDIRE BIT(17) /* Response Direction Error */ +#define ATMCI_RCRCE BIT(18) /* Response CRC Error */ +#define ATMCI_RENDE BIT(19) /* Response End Bit Error */ +#define ATMCI_RTOE BIT(20) /* Response Time-Out Error */ +#define ATMCI_DCRCE BIT(21) /* Data CRC Error */ +#define ATMCI_DTOE BIT(22) /* Data Time-Out Error */ +#define ATMCI_CSTOE BIT(23) /* Completion Signal Time-out Error */ +#define ATMCI_BLKOVRE BIT(24) /* DMA Block Overrun Error */ +#define ATMCI_DMADONE BIT(25) /* DMA Transfer Done */ +#define ATMCI_FIFOEMPTY BIT(26) /* FIFO Empty Flag */ +#define ATMCI_XFRDONE BIT(27) /* Transfer Done Flag */ +#define ATMCI_ACKRCV BIT(28) /* Boot Operation Acknowledge Received */ +#define ATMCI_ACKRCVE BIT(29) /* Boot Operation Acknowledge Error */ +#define ATMCI_OVRE BIT(30) /* RX Overrun Error */ +#define ATMCI_UNRE BIT(31) /* TX Underrun Error */ +#define ATMCI_DMA 0x0050 /* DMA Configuration[2] */ +#define ATMCI_DMA_OFFSET(x) ((x) << 0) /* DMA Write Buffer Offset */ +#define ATMCI_DMA_CHKSIZE(x) ((x) << 4) /* DMA Channel Read and Write Chunk Size */ +#define ATMCI_DMAEN BIT(8) /* DMA Hardware Handshaking Enable */ +#define ATMCI_CFG 0x0054 /* Configuration[2] */ +#define ATMCI_CFG_FIFOMODE_1DATA BIT(0) /* MCI Internal FIFO control mode */ +#define ATMCI_CFG_FERRCTRL_COR BIT(4) /* Flow Error flag reset control mode */ +#define ATMCI_CFG_HSMODE BIT(8) /* High Speed Mode */ +#define ATMCI_CFG_LSYNC BIT(12) /* Synchronize on the last block */ +#define ATMCI_WPMR 0x00e4 /* Write Protection Mode[2] */ +#define ATMCI_WP_EN BIT(0) /* WP Enable */ +#define ATMCI_WP_KEY (0x4d4349 << 8) /* WP Key */ +#define ATMCI_WPSR 0x00e8 /* Write Protection Status[2] */ +#define ATMCI_GET_WP_VS(x) ((x) & 0x0f) +#define ATMCI_GET_WP_VSRC(x) (((x) >> 8) & 0xffff) +#define ATMCI_VERSION 0x00FC /* Version */ +#define ATMCI_FIFO_APERTURE 0x0200 /* FIFO Aperture[2] */ + +/* This is not including the FIFO Aperture on MCI2 */ +#define ATMCI_REGS_SIZE 0x100 + +/* Register access macros */ +#define atmci_readl(port, reg) \ + __raw_readl((port)->regs + reg) +#define atmci_writel(port, reg, value) \ + __raw_writel((value), (port)->regs + reg) + +/* On AVR chips the Peripheral DMA Controller is not connected to MCI. */ +#ifdef CONFIG_AVR32 +# define ATMCI_PDC_CONNECTED 0 +#else +# define ATMCI_PDC_CONNECTED 1 +#endif #define AUTOSUSPEND_DELAY 50 @@ -584,6 +717,29 @@ static inline unsigned int atmci_get_version(struct atmel_mci *host) return atmci_readl(host, ATMCI_VERSION) & 0x00000fff; } +/* + * Fix sconfig's burst size according to atmel MCI. We need to convert them as: + * 1 -> 0, 4 -> 1, 8 -> 2, 16 -> 3. + * With version 0x600, we need to convert them as: 1 -> 0, 2 -> 1, 4 -> 2, + * 8 -> 3, 16 -> 4. + * + * This can be done by finding most significant bit set. + */ +static inline unsigned int atmci_convert_chksize(struct atmel_mci *host, + unsigned int maxburst) +{ + unsigned int version = atmci_get_version(host); + unsigned int offset = 2; + + if (version >= 0x600) + offset = 1; + + if (maxburst > 1) + return fls(maxburst) - offset; + else + return 0; +} + static void atmci_timeout_timer(unsigned long data) { struct atmel_mci *host; @@ -1034,11 +1190,13 @@ atmci_prepare_data_dma(struct atmel_mci *host, struct mmc_data *data) if (data->flags & MMC_DATA_READ) { direction = DMA_FROM_DEVICE; host->dma_conf.direction = slave_dirn = DMA_DEV_TO_MEM; - maxburst = atmci_convert_chksize(host->dma_conf.src_maxburst); + maxburst = atmci_convert_chksize(host, + host->dma_conf.src_maxburst); } else { direction = DMA_TO_DEVICE; host->dma_conf.direction = slave_dirn = DMA_MEM_TO_DEV; - maxburst = atmci_convert_chksize(host->dma_conf.dst_maxburst); + maxburst = atmci_convert_chksize(host, + host->dma_conf.dst_maxburst); } if (host->caps.has_dma_conf_reg) @@ -2280,6 +2438,23 @@ static int atmci_configure_dma(struct atmel_mci *host) { host->dma.chan = dma_request_slave_channel_reason(&host->pdev->dev, "rxtx"); + + if (PTR_ERR(host->dma.chan) == -ENODEV) { + struct mci_platform_data *pdata = host->pdev->dev.platform_data; + dma_cap_mask_t mask; + + if (!pdata->dma_filter) + return -ENODEV; + + dma_cap_zero(mask); + dma_cap_set(DMA_SLAVE, mask); + + host->dma.chan = dma_request_channel(mask, pdata->dma_filter, + pdata->dma_slave); + if (!host->dma.chan) + host->dma.chan = ERR_PTR(-ENODEV); + } + if (IS_ERR(host->dma.chan)) return PTR_ERR(host->dma.chan); |