diff options
Diffstat (limited to 'drivers/usb/gadget/s3c-hsotg.c')
| -rw-r--r-- | drivers/usb/gadget/s3c-hsotg.c | 3853 |
1 files changed, 0 insertions, 3853 deletions
diff --git a/drivers/usb/gadget/s3c-hsotg.c b/drivers/usb/gadget/s3c-hsotg.c deleted file mode 100644 index 2a9cb674926a..000000000000 --- a/drivers/usb/gadget/s3c-hsotg.c +++ /dev/null @@ -1,3853 +0,0 @@ -/** - * linux/drivers/usb/gadget/s3c-hsotg.c - * - * Copyright (c) 2011 Samsung Electronics Co., Ltd. - * http://www.samsung.com - * - * Copyright 2008 Openmoko, Inc. - * Copyright 2008 Simtec Electronics - * Ben Dooks <ben@simtec.co.uk> - * http://armlinux.simtec.co.uk/ - * - * S3C USB2.0 High-speed / OtG driver - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License version 2 as - * published by the Free Software Foundation. - */ - -#include <linux/kernel.h> -#include <linux/module.h> -#include <linux/spinlock.h> -#include <linux/interrupt.h> -#include <linux/platform_device.h> -#include <linux/dma-mapping.h> -#include <linux/debugfs.h> -#include <linux/seq_file.h> -#include <linux/delay.h> -#include <linux/io.h> -#include <linux/slab.h> -#include <linux/clk.h> -#include <linux/regulator/consumer.h> -#include <linux/of_platform.h> -#include <linux/phy/phy.h> - -#include <linux/usb/ch9.h> -#include <linux/usb/gadget.h> -#include <linux/usb/phy.h> -#include <linux/platform_data/s3c-hsotg.h> - -#include "s3c-hsotg.h" - -static const char * const s3c_hsotg_supply_names[] = { - "vusb_d", /* digital USB supply, 1.2V */ - "vusb_a", /* analog USB supply, 1.1V */ -}; - -/* - * EP0_MPS_LIMIT - * - * Unfortunately there seems to be a limit of the amount of data that can - * be transferred by IN transactions on EP0. This is either 127 bytes or 3 - * packets (which practically means 1 packet and 63 bytes of data) when the - * MPS is set to 64. - * - * This means if we are wanting to move >127 bytes of data, we need to - * split the transactions up, but just doing one packet at a time does - * not work (this may be an implicit DATA0 PID on first packet of the - * transaction) and doing 2 packets is outside the controller's limits. - * - * If we try to lower the MPS size for EP0, then no transfers work properly - * for EP0, and the system will fail basic enumeration. As no cause for this - * has currently been found, we cannot support any large IN transfers for - * EP0. - */ -#define EP0_MPS_LIMIT 64 - -struct s3c_hsotg; -struct s3c_hsotg_req; - -/** - * struct s3c_hsotg_ep - driver endpoint definition. - * @ep: The gadget layer representation of the endpoint. - * @name: The driver generated name for the endpoint. - * @queue: Queue of requests for this endpoint. - * @parent: Reference back to the parent device structure. - * @req: The current request that the endpoint is processing. This is - * used to indicate an request has been loaded onto the endpoint - * and has yet to be completed (maybe due to data move, or simply - * awaiting an ack from the core all the data has been completed). - * @debugfs: File entry for debugfs file for this endpoint. - * @lock: State lock to protect contents of endpoint. - * @dir_in: Set to true if this endpoint is of the IN direction, which - * means that it is sending data to the Host. - * @index: The index for the endpoint registers. - * @mc: Multi Count - number of transactions per microframe - * @interval - Interval for periodic endpoints - * @name: The name array passed to the USB core. - * @halted: Set if the endpoint has been halted. - * @periodic: Set if this is a periodic ep, such as Interrupt - * @isochronous: Set if this is a isochronous ep - * @sent_zlp: Set if we've sent a zero-length packet. - * @total_data: The total number of data bytes done. - * @fifo_size: The size of the FIFO (for periodic IN endpoints) - * @fifo_load: The amount of data loaded into the FIFO (periodic IN) - * @last_load: The offset of data for the last start of request. - * @size_loaded: The last loaded size for DxEPTSIZE for periodic IN - * - * This is the driver's state for each registered enpoint, allowing it - * to keep track of transactions that need doing. Each endpoint has a - * lock to protect the state, to try and avoid using an overall lock - * for the host controller as much as possible. - * - * For periodic IN endpoints, we have fifo_size and fifo_load to try - * and keep track of the amount of data in the periodic FIFO for each - * of these as we don't have a status register that tells us how much - * is in each of them. (note, this may actually be useless information - * as in shared-fifo mode periodic in acts like a single-frame packet - * buffer than a fifo) - */ -struct s3c_hsotg_ep { - struct usb_ep ep; - struct list_head queue; - struct s3c_hsotg *parent; - struct s3c_hsotg_req *req; - struct dentry *debugfs; - - - unsigned long total_data; - unsigned int size_loaded; - unsigned int last_load; - unsigned int fifo_load; - unsigned short fifo_size; - - unsigned char dir_in; - unsigned char index; - unsigned char mc; - unsigned char interval; - - unsigned int halted:1; - unsigned int periodic:1; - unsigned int isochronous:1; - unsigned int sent_zlp:1; - - char name[10]; -}; - -/** - * struct s3c_hsotg - driver state. - * @dev: The parent device supplied to the probe function - * @driver: USB gadget driver - * @phy: The otg phy transceiver structure for phy control. - * @uphy: The otg phy transceiver structure for old USB phy control. - * @plat: The platform specific configuration data. This can be removed once - * all SoCs support usb transceiver. - * @regs: The memory area mapped for accessing registers. - * @irq: The IRQ number we are using - * @supplies: Definition of USB power supplies - * @phyif: PHY interface width - * @dedicated_fifos: Set if the hardware has dedicated IN-EP fifos. - * @num_of_eps: Number of available EPs (excluding EP0) - * @debug_root: root directrory for debugfs. - * @debug_file: main status file for debugfs. - * @debug_fifo: FIFO status file for debugfs. - * @ep0_reply: Request used for ep0 reply. - * @ep0_buff: Buffer for EP0 reply data, if needed. - * @ctrl_buff: Buffer for EP0 control requests. - * @ctrl_req: Request for EP0 control packets. - * @setup: NAK management for EP0 SETUP - * @last_rst: Time of last reset - * @eps: The endpoints being supplied to the gadget framework - */ -struct s3c_hsotg { - struct device *dev; - struct usb_gadget_driver *driver; - struct phy *phy; - struct usb_phy *uphy; - struct s3c_hsotg_plat *plat; - - spinlock_t lock; - - void __iomem *regs; - int irq; - struct clk *clk; - - struct regulator_bulk_data supplies[ARRAY_SIZE(s3c_hsotg_supply_names)]; - - u32 phyif; - unsigned int dedicated_fifos:1; - unsigned char num_of_eps; - - struct dentry *debug_root; - struct dentry *debug_file; - struct dentry *debug_fifo; - - struct usb_request *ep0_reply; - struct usb_request *ctrl_req; - u8 ep0_buff[8]; - u8 ctrl_buff[8]; - - struct usb_gadget gadget; - unsigned int setup; - unsigned long last_rst; - struct s3c_hsotg_ep *eps; -}; - -/** - * struct s3c_hsotg_req - data transfer request - * @req: The USB gadget request - * @queue: The list of requests for the endpoint this is queued for. - * @in_progress: Has already had size/packets written to core - * @mapped: DMA buffer for this request has been mapped via dma_map_single(). - */ -struct s3c_hsotg_req { - struct usb_request req; - struct list_head queue; - unsigned char in_progress; - unsigned char mapped; -}; - -/* conversion functions */ -static inline struct s3c_hsotg_req *our_req(struct usb_request *req) -{ - return container_of(req, struct s3c_hsotg_req, req); -} - -static inline struct s3c_hsotg_ep *our_ep(struct usb_ep *ep) -{ - return container_of(ep, struct s3c_hsotg_ep, ep); -} - -static inline struct s3c_hsotg *to_hsotg(struct usb_gadget *gadget) -{ - return container_of(gadget, struct s3c_hsotg, gadget); -} - -static inline void __orr32(void __iomem *ptr, u32 val) -{ - writel(readl(ptr) | val, ptr); -} - -static inline void __bic32(void __iomem *ptr, u32 val) -{ - writel(readl(ptr) & ~val, ptr); -} - -/* forward decleration of functions */ -static void s3c_hsotg_dump(struct s3c_hsotg *hsotg); - -/** - * using_dma - return the DMA status of the driver. - * @hsotg: The driver state. - * - * Return true if we're using DMA. - * - * Currently, we have the DMA support code worked into everywhere - * that needs it, but the AMBA DMA implementation in the hardware can - * only DMA from 32bit aligned addresses. This means that gadgets such - * as the CDC Ethernet cannot work as they often pass packets which are - * not 32bit aligned. - * - * Unfortunately the choice to use DMA or not is global to the controller - * and seems to be only settable when the controller is being put through - * a core reset. This means we either need to fix the gadgets to take - * account of DMA alignment, or add bounce buffers (yuerk). - * - * Until this issue is sorted out, we always return 'false'. - */ -static inline bool using_dma(struct s3c_hsotg *hsotg) -{ - return false; /* support is not complete */ -} - -/** - * s3c_hsotg_en_gsint - enable one or more of the general interrupt - * @hsotg: The device state - * @ints: A bitmask of the interrupts to enable - */ -static void s3c_hsotg_en_gsint(struct s3c_hsotg *hsotg, u32 ints) -{ - u32 gsintmsk = readl(hsotg->regs + GINTMSK); - u32 new_gsintmsk; - - new_gsintmsk = gsintmsk | ints; - - if (new_gsintmsk != gsintmsk) { - dev_dbg(hsotg->dev, "gsintmsk now 0x%08x\n", new_gsintmsk); - writel(new_gsintmsk, hsotg->regs + GINTMSK); - } -} - -/** - * s3c_hsotg_disable_gsint - disable one or more of the general interrupt - * @hsotg: The device state - * @ints: A bitmask of the interrupts to enable - */ -static void s3c_hsotg_disable_gsint(struct s3c_hsotg *hsotg, u32 ints) -{ - u32 gsintmsk = readl(hsotg->regs + GINTMSK); - u32 new_gsintmsk; - - new_gsintmsk = gsintmsk & ~ints; - - if (new_gsintmsk != gsintmsk) - writel(new_gsintmsk, hsotg->regs + GINTMSK); -} - -/** - * s3c_hsotg_ctrl_epint - enable/disable an endpoint irq - * @hsotg: The device state - * @ep: The endpoint index - * @dir_in: True if direction is in. - * @en: The enable value, true to enable - * - * Set or clear the mask for an individual endpoint's interrupt - * request. - */ -static void s3c_hsotg_ctrl_epint(struct s3c_hsotg *hsotg, - unsigned int ep, unsigned int dir_in, - unsigned int en) -{ - unsigned long flags; - u32 bit = 1 << ep; - u32 daint; - - if (!dir_in) - bit <<= 16; - - local_irq_save(flags); - daint = readl(hsotg->regs + DAINTMSK); - if (en) - daint |= bit; - else - daint &= ~bit; - writel(daint, hsotg->regs + DAINTMSK); - local_irq_restore(flags); -} - -/** - * s3c_hsotg_init_fifo - initialise non-periodic FIFOs - * @hsotg: The device instance. - */ -static void s3c_hsotg_init_fifo(struct s3c_hsotg *hsotg) -{ - unsigned int ep; - unsigned int addr; - unsigned int size; - int timeout; - u32 val; - - /* set FIFO sizes to 2048/1024 */ - - writel(2048, hsotg->regs + GRXFSIZ); - writel(GNPTXFSIZ_NPTxFStAddr(2048) | - GNPTXFSIZ_NPTxFDep(1024), - hsotg->regs + GNPTXFSIZ); - - /* - * arange all the rest of the TX FIFOs, as some versions of this - * block have overlapping default addresses. This also ensures - * that if the settings have been changed, then they are set to - * known values. - */ - - /* start at the end of the GNPTXFSIZ, rounded up */ - addr = 2048 + 1024; - size = 768; - - /* - * currently we allocate TX FIFOs for all possible endpoints, - * and assume that they are all the same size. - */ - - for (ep = 1; ep <= 15; ep++) { - val = addr; - val |= size << DPTXFSIZn_DPTxFSize_SHIFT; - addr += size; - - writel(val, hsotg->regs + DPTXFSIZn(ep)); - } - - /* - * according to p428 of the design guide, we need to ensure that - * all fifos are flushed before continuing - */ - - writel(GRSTCTL_TxFNum(0x10) | GRSTCTL_TxFFlsh | - GRSTCTL_RxFFlsh, hsotg->regs + GRSTCTL); - - /* wait until the fifos are both flushed */ - timeout = 100; - while (1) { - val = readl(hsotg->regs + GRSTCTL); - - if ((val & (GRSTCTL_TxFFlsh | GRSTCTL_RxFFlsh)) == 0) - break; - - if (--timeout == 0) { - dev_err(hsotg->dev, - "%s: timeout flushing fifos (GRSTCTL=%08x)\n", - __func__, val); - } - - udelay(1); - } - - dev_dbg(hsotg->dev, "FIFOs reset, timeout at %d\n", timeout); -} - -/** - * @ep: USB endpoint to allocate request for. - * @flags: Allocation flags - * - * Allocate a new USB request structure appropriate for the specified endpoint - */ -static struct usb_request *s3c_hsotg_ep_alloc_request(struct usb_ep *ep, - gfp_t flags) -{ - struct s3c_hsotg_req *req; - - req = kzalloc(sizeof(struct s3c_hsotg_req), flags); - if (!req) - return NULL; - - INIT_LIST_HEAD(&req->queue); - - return &req->req; -} - -/** - * is_ep_periodic - return true if the endpoint is in periodic mode. - * @hs_ep: The endpoint to query. - * - * Returns true if the endpoint is in periodic mode, meaning it is being - * used for an Interrupt or ISO transfer. - */ -static inline int is_ep_periodic(struct s3c_hsotg_ep *hs_ep) -{ - return hs_ep->periodic; -} - -/** - * s3c_hsotg_unmap_dma - unmap the DMA memory being used for the request - * @hsotg: The device state. - * @hs_ep: The endpoint for the request - * @hs_req: The request being processed. - * - * This is the reverse of s3c_hsotg_map_dma(), called for the completion - * of a request to ensure the buffer is ready for access by the caller. - */ -static void s3c_hsotg_unmap_dma(struct s3c_hsotg *hsotg, - struct s3c_hsotg_ep *hs_ep, - struct s3c_hsotg_req *hs_req) -{ - struct usb_request *req = &hs_req->req; - - /* ignore this if we're not moving any data */ - if (hs_req->req.length == 0) - return; - - usb_gadget_unmap_request(&hsotg->gadget, req, hs_ep->dir_in); -} - -/** - * s3c_hsotg_write_fifo - write packet Data to the TxFIFO - * @hsotg: The controller state. - * @hs_ep: The endpoint we're going to write for. - * @hs_req: The request to write data for. - * - * This is called when the TxFIFO has some space in it to hold a new - * transmission and we have something to give it. The actual setup of - * the data size is done elsewhere, so all we have to do is to actually - * write the data. - * - * The return value is zero if there is more space (or nothing was done) - * otherwise -ENOSPC is returned if the FIFO space was used up. - * - * This routine is only needed for PIO - */ -static int s3c_hsotg_write_fifo(struct s3c_hsotg *hsotg, - struct s3c_hsotg_ep *hs_ep, - struct s3c_hsotg_req *hs_req) -{ - bool periodic = is_ep_periodic(hs_ep); - u32 gnptxsts = readl(hsotg->regs + GNPTXSTS); - int buf_pos = hs_req->req.actual; - int to_write = hs_ep->size_loaded; - void *data; - int can_write; - int pkt_round; - int max_transfer; - - to_write -= (buf_pos - hs_ep->last_load); - - /* if there's nothing to write, get out early */ - if (to_write == 0) - return 0; - - if (periodic && !hsotg->dedicated_fifos) { - u32 epsize = readl(hsotg->regs + DIEPTSIZ(hs_ep->index)); - int size_left; - int size_done; - - /* - * work out how much data was loaded so we can calculate - * how much data is left in the fifo. - */ - - size_left = DxEPTSIZ_XferSize_GET(epsize); - - /* - * if shared fifo, we cannot write anything until the - * previous data has been completely sent. - */ - if (hs_ep->fifo_load != 0) { - s3c_hsotg_en_gsint(hsotg, GINTSTS_PTxFEmp); - return -ENOSPC; - } - - dev_dbg(hsotg->dev, "%s: left=%d, load=%d, fifo=%d, size %d\n", - __func__, size_left, - hs_ep->size_loaded, hs_ep->fifo_load, hs_ep->fifo_size); - - /* how much of the data has moved */ - size_done = hs_ep->size_loaded - size_left; - - /* how much data is left in the fifo */ - can_write = hs_ep->fifo_load - size_done; - dev_dbg(hsotg->dev, "%s: => can_write1=%d\n", - __func__, can_write); - - can_write = hs_ep->fifo_size - can_write; - dev_dbg(hsotg->dev, "%s: => can_write2=%d\n", - __func__, can_write); - - if (can_write <= 0) { - s3c_hsotg_en_gsint(hsotg, GINTSTS_PTxFEmp); - return -ENOSPC; - } - } else if (hsotg->dedicated_fifos && hs_ep->index != 0) { - can_write = readl(hsotg->regs + DTXFSTS(hs_ep->index)); - - can_write &= 0xffff; - can_write *= 4; - } else { - if (GNPTXSTS_NPTxQSpcAvail_GET(gnptxsts) == 0) { - dev_dbg(hsotg->dev, - "%s: no queue slots available (0x%08x)\n", - __func__, gnptxsts); - - s3c_hsotg_en_gsint(hsotg, GINTSTS_NPTxFEmp); - return -ENOSPC; - } - - can_write = GNPTXSTS_NPTxFSpcAvail_GET(gnptxsts); - can_write *= 4; /* fifo size is in 32bit quantities. */ - } - - max_transfer = hs_ep->ep.maxpacket * hs_ep->mc; - - dev_dbg(hsotg->dev, "%s: GNPTXSTS=%08x, can=%d, to=%d, max_transfer %d\n", - __func__, gnptxsts, can_write, to_write, max_transfer); - - /* - * limit to 512 bytes of data, it seems at least on the non-periodic - * FIFO, requests of >512 cause the endpoint to get stuck with a - * fragment of the end of the transfer in it. - */ - if (can_write > 512 && !periodic) - can_write = 512; - - /* - * limit the write to one max-packet size worth of data, but allow - * the transfer to return that it did not run out of fifo space - * doing it. - */ - if (to_write > max_transfer) { - to_write = max_transfer; - - /* it's needed only when we do not use dedicated fifos */ - if (!hsotg->dedicated_fifos) - s3c_hsotg_en_gsint(hsotg, - periodic ? GINTSTS_PTxFEmp : - GINTSTS_NPTxFEmp); - } - - /* see if we can write data */ - - if (to_write > can_write) { - to_write = can_write; - pkt_round = to_write % max_transfer; - - /* - * Round the write down to an - * exact number of packets. - * - * Note, we do not currently check to see if we can ever - * write a full packet or not to the FIFO. - */ - - if (pkt_round) - to_write -= pkt_round; - - /* - * enable correct FIFO interrupt to alert us when there - * is more room left. - */ - - /* it's needed only when we do not use dedicated fifos */ - if (!hsotg->dedicated_fifos) - s3c_hsotg_en_gsint(hsotg, - periodic ? GINTSTS_PTxFEmp : - GINTSTS_NPTxFEmp); - } - - dev_dbg(hsotg->dev, "write %d/%d, can_write %d, done %d\n", - to_write, hs_req->req.length, can_write, buf_pos); - - if (to_write <= 0) - return -ENOSPC; - - hs_req->req.actual = buf_pos + to_write; - hs_ep->total_data += to_write; - - if (periodic) - hs_ep->fifo_load += to_write; - - to_write = DIV_ROUND_UP(to_write, 4); - data = hs_req->req.buf + buf_pos; - - iowrite32_rep(hsotg->regs + EPFIFO(hs_ep->index), data, to_write); - - return (to_write >= can_write) ? -ENOSPC : 0; -} - -/** - * get_ep_limit - get the maximum data legnth for this endpoint - * @hs_ep: The endpoint - * - * Return the maximum data that can be queued in one go on a given endpoint - * so that transfers that are too long can be split. - */ -static unsigned get_ep_limit(struct s3c_hsotg_ep *hs_ep) -{ - int index = hs_ep->index; - unsigned maxsize; - unsigned maxpkt; - - if (index != 0) { - maxsize = DxEPTSIZ_XferSize_LIMIT + 1; - maxpkt = DxEPTSIZ_PktCnt_LIMIT + 1; - } else { - maxsize = 64+64; - if (hs_ep->dir_in) - maxpkt = DIEPTSIZ0_PktCnt_LIMIT + 1; - else - maxpkt = 2; - } - - /* we made the constant loading easier above by using +1 */ - maxpkt--; - maxsize--; - - /* - * constrain by packet count if maxpkts*pktsize is greater - * than the length register size. - */ - - if ((maxpkt * hs_ep->ep.maxpacket) < maxsize) - maxsize = maxpkt * hs_ep->ep.maxpacket; - - return maxsize; -} - -/** - * s3c_hsotg_start_req - start a USB request from an endpoint's queue - * @hsotg: The controller state. - * @hs_ep: The endpoint to process a request for - * @hs_req: The request to start. - * @continuing: True if we are doing more for the current request. - * - * Start the given request running by setting the endpoint registers - * appropriately, and writing any data to the FIFOs. - */ -static void s3c_hsotg_start_req(struct s3c_hsotg *hsotg, - struct s3c_hsotg_ep *hs_ep, - struct s3c_hsotg_req *hs_req, - bool continuing) -{ - struct usb_request *ureq = &hs_req->req; - int index = hs_ep->index; - int dir_in = hs_ep->dir_in; - u32 epctrl_reg; - u32 epsize_reg; - u32 epsize; - u32 ctrl; - unsigned length; - unsigned packets; - unsigned maxreq; - - if (index != 0) { - if (hs_ep->req && !continuing) { - dev_err(hsotg->dev, "%s: active request\n", __func__); - WARN_ON(1); - return; - } else if (hs_ep->req != hs_req && continuing) { - dev_err(hsotg->dev, - "%s: continue different req\n", __func__); - WARN_ON(1); - return; - } - } - - epctrl_reg = dir_in ? DIEPCTL(index) : DOEPCTL(index); - epsize_reg = dir_in ? DIEPTSIZ(index) : DOEPTSIZ(index); - - dev_dbg(hsotg->dev, "%s: DxEPCTL=0x%08x, ep %d, dir %s\n", - __func__, readl(hsotg->regs + epctrl_reg), index, - hs_ep->dir_in ? "in" : "out"); - - /* If endpoint is stalled, we will restart request later */ - ctrl = readl(hsotg->regs + epctrl_reg); - - if (ctrl & DxEPCTL_Stall) { - dev_warn(hsotg->dev, "%s: ep%d is stalled\n", __func__, index); - return; - } - - length = ureq->length - ureq->actual; - dev_dbg(hsotg->dev, "ureq->length:%d ureq->actual:%d\n", - ureq->length, ureq->actual); - if (0) - dev_dbg(hsotg->dev, - "REQ buf %p len %d dma 0x%pad noi=%d zp=%d snok=%d\n", - ureq->buf, length, &ureq->dma, - ureq->no_interrupt, ureq->zero, ureq->short_not_ok); - - maxreq = get_ep_limit(hs_ep); - if (length > maxreq) { - int round = maxreq % hs_ep->ep.maxpacket; - - dev_dbg(hsotg->dev, "%s: length %d, max-req %d, r %d\n", - __func__, length, maxreq, round); - - /* round down to multiple of packets */ - if (round) - maxreq -= round; - - length = maxreq; - } - - if (length) - packets = DIV_ROUND_UP(length, hs_ep->ep.maxpacket); - else - packets = 1; /* send one packet if length is zero. */ - - if (hs_ep->isochronous && length > (hs_ep->mc * hs_ep->ep.maxpacket)) { - dev_err(hsotg->dev, "req length > maxpacket*mc\n"); - return; - } - - if (dir_in && index != 0) - if (hs_ep->isochronous) - epsize = DxEPTSIZ_MC(packets); - else - epsize = DxEPTSIZ_MC(1); - else - epsize = 0; - - if (index != 0 && ureq->zero) { - /* - * test for the packets being exactly right for the - * transfer - */ - - if (length == (packets * hs_ep->ep.maxpacket)) - packets++; - } - - epsize |= DxEPTSIZ_PktCnt(packets); - epsize |= DxEPTSIZ_XferSize(length); - - dev_dbg(hsotg->dev, "%s: %d@%d/%d, 0x%08x => 0x%08x\n", - __func__, packets, length, ureq->length, epsize, epsize_reg); - - /* store the request as the current one we're doing */ - hs_ep->req = hs_req; - - /* write size / packets */ - writel(epsize, hsotg->regs + epsize_reg); - - if (using_dma(hsotg) && !continuing) { - unsigned int dma_reg; - - /* - * write DMA address to control register, buffer already - * synced by s3c_hsotg_ep_queue(). - */ - - dma_reg = dir_in ? DIEPDMA(index) : DOEPDMA(index); - writel(ureq->dma, hsotg->regs + dma_reg); - - dev_dbg(hsotg->dev, "%s: 0x%pad => 0x%08x\n", - __func__, &ureq->dma, dma_reg); - } - - ctrl |= DxEPCTL_EPEna; /* ensure ep enabled */ - ctrl |= DxEPCTL_USBActEp; - - dev_dbg(hsotg->dev, "setup req:%d\n", hsotg->setup); - - /* For Setup request do not clear NAK */ - if (hsotg->setup && index == 0) - hsotg->setup = 0; - else - ctrl |= DxEPCTL_CNAK; /* clear NAK set by core */ - - - dev_dbg(hsotg->dev, "%s: DxEPCTL=0x%08x\n", __func__, ctrl); - writel(ctrl, hsotg->regs + epctrl_reg); - - /* - * set these, it seems that DMA support increments past the end - * of the packet buffer so we need to calculate the length from - * this information. - */ - hs_ep->size_loaded = length; - hs_ep->last_load = ureq->actual; - - if (dir_in && !using_dma(hsotg)) { - /* set these anyway, we may need them for non-periodic in */ - hs_ep->fifo_load = 0; - - s3c_hsotg_write_fifo(hsotg, hs_ep, hs_req); - } - - /* - * clear the INTknTXFEmpMsk when we start request, more as a aide - * to debugging to see what is going on. - */ - if (dir_in) - writel(DIEPMSK_INTknTXFEmpMsk, - hsotg->regs + DIEPINT(index)); - - /* - * Note, trying to clear the NAK here causes problems with transmit - * on the S3C6400 ending up with the TXFIFO becoming full. - */ - - /* check ep is enabled */ - if (!(readl(hsotg->regs + epctrl_reg) & DxEPCTL_EPEna)) - dev_warn(hsotg->dev, - "ep%d: failed to become enabled (DxEPCTL=0x%08x)?\n", - index, readl(hsotg->regs + epctrl_reg)); - - dev_dbg(hsotg->dev, "%s: DxEPCTL=0x%08x\n", - __func__, readl(hsotg->regs + epctrl_reg)); - - /* enable ep interrupts */ - s3c_hsotg_ctrl_epint(hsotg, hs_ep->index, hs_ep->dir_in, 1); -} - -/** - * s3c_hsotg_map_dma - map the DMA memory being used for the request - * @hsotg: The device state. - * @hs_ep: The endpoint the request is on. - * @req: The request being processed. - * - * We've been asked to queue a request, so ensure that the memory buffer - * is correctly setup for DMA. If we've been passed an extant DMA address - * then ensure the buffer has been synced to memory. If our buffer has no - * DMA memory, then we map the memory and mark our request to allow us to - * cleanup on completion. - */ -static int s3c_hsotg_map_dma(struct s3c_hsotg *hsotg, - struct s3c_hsotg_ep *hs_ep, - struct usb_request *req) -{ - struct s3c_hsotg_req *hs_req = our_req(req); - int ret; - - /* if the length is zero, ignore the DMA data */ - if (hs_req->req.length == 0) - return 0; - - ret = usb_gadget_map_request(&hsotg->gadget, req, hs_ep->dir_in); - if (ret) - goto dma_error; - - return 0; - -dma_error: - dev_err(hsotg->dev, "%s: failed to map buffer %p, %d bytes\n", - __func__, req->buf, req->length); - - return -EIO; -} - -static int s3c_hsotg_ep_queue(struct usb_ep *ep, struct usb_request *req, - gfp_t gfp_flags) -{ - struct s3c_hsotg_req *hs_req = our_req(req); - struct s3c_hsotg_ep *hs_ep = our_ep(ep); - struct s3c_hsotg *hs = hs_ep->parent; - bool first; - - dev_dbg(hs->dev, "%s: req %p: %d@%p, noi=%d, zero=%d, snok=%d\n", - ep->name, req, req->length, req->buf, req->no_interrupt, - req->zero, req->short_not_ok); - - /* initialise status of the request */ - INIT_LIST_HEAD(&hs_req->queue); - req->actual = 0; - req->status = -EINPROGRESS; - - /* if we're using DMA, sync the buffers as necessary */ - if (using_dma(hs)) { - int ret = s3c_hsotg_map_dma(hs, hs_ep, req); - if (ret) - return ret; - } - - first = list_empty(&hs_ep->queue); - list_add_tail(&hs_req->queue, &hs_ep->queue); - - if (first) - s3c_hsotg_start_req(hs, hs_ep, hs_req, false); - - return 0; -} - -static int s3c_hsotg_ep_queue_lock(struct usb_ep *ep, struct usb_request *req, - gfp_t gfp_flags) -{ - struct s3c_hsotg_ep *hs_ep = our_ep(ep); - struct s3c_hsotg *hs = hs_ep->parent; - unsigned long flags = 0; - int ret = 0; - - spin_lock_irqsave(&hs->lock, flags); - ret = s3c_hsotg_ep_queue(ep, req, gfp_flags); - spin_unlock_irqrestore(&hs->lock, flags); - - return ret; -} - -static void s3c_hsotg_ep_free_request(struct usb_ep *ep, - struct usb_request *req) -{ - struct s3c_hsotg_req *hs_req = our_req(req); - - kfree(hs_req); -} - -/** - * s3c_hsotg_complete_oursetup - setup completion callback - * @ep: The endpoint the request was on. - * @req: The request completed. - * - * Called on completion of any requests the driver itself - * submitted that need cleaning up. - */ -static void s3c_hsotg_complete_oursetup(struct usb_ep *ep, - struct usb_request *req) -{ - struct s3c_hsotg_ep *hs_ep = our_ep(ep); - struct s3c_hsotg *hsotg = hs_ep->parent; - - dev_dbg(hsotg->dev, "%s: ep %p, req %p\n", __func__, ep, req); - - s3c_hsotg_ep_free_request(ep, req); -} - -/** - * ep_from_windex - convert control wIndex value to endpoint - * @hsotg: The driver state. - * @windex: The control request wIndex field (in host order). - * - * Convert the given wIndex into a pointer to an driver endpoint - * structure, or return NULL if it is not a valid endpoint. - */ -static struct s3c_hsotg_ep *ep_from_windex(struct s3c_hsotg *hsotg, - u32 windex) -{ - struct s3c_hsotg_ep *ep = &hsotg->eps[windex & 0x7F]; - int dir = (windex & USB_DIR_IN) ? 1 : 0; - int idx = windex & 0x7F; - - if (windex >= 0x100) - return NULL; - - if (idx > hsotg->num_of_eps) - return NULL; - - if (idx && ep->dir_in != dir) - return NULL; - - return ep; -} - -/** - * s3c_hsotg_send_reply - send reply to control request - * @hsotg: The device state - * @ep: Endpoint 0 - * @buff: Buffer for request - * @length: Length of reply. - * - * Create a request and queue it on the given endpoint. This is useful as - * an internal method of sending replies to certain control requests, etc. - */ -static int s3c_hsotg_send_reply(struct s3c_hsotg *hsotg, - struct s3c_hsotg_ep *ep, - void *buff, - int length) -{ - struct usb_request *req; - int ret; - - dev_dbg(hsotg->dev, "%s: buff %p, len %d\n", __func__, buff, length); - - req = s3c_hsotg_ep_alloc_request(&ep->ep, GFP_ATOMIC); - hsotg->ep0_reply = req; - if (!req) { - dev_warn(hsotg->dev, "%s: cannot alloc req\n", __func__); - return -ENOMEM; - } - - req->buf = hsotg->ep0_buff; - req->length = length; - req->zero = 1; /* always do zero-length final transfer */ - req->complete = s3c_hsotg_complete_oursetup; - - if (length) - memcpy(req->buf, buff, length); - else - ep->sent_zlp = 1; - - ret = s3c_hsotg_ep_queue(&ep->ep, req, GFP_ATOMIC); - if (ret) { - dev_warn(hsotg->dev, "%s: cannot queue req\n", __func__); - return ret; - } - - return 0; -} - -/** - * s3c_hsotg_process_req_status - process request GET_STATUS - * @hsotg: The device state - * @ctrl: USB control request - */ -static int s3c_hsotg_process_req_status(struct s3c_hsotg *hsotg, - struct usb_ctrlrequest *ctrl) -{ - struct s3c_hsotg_ep *ep0 = &hsotg->eps[0]; - struct s3c_hsotg_ep *ep; - __le16 reply; - int ret; - - dev_dbg(hsotg->dev, "%s: USB_REQ_GET_STATUS\n", __func__); - - if (!ep0->dir_in) { - dev_warn(hsotg->dev, "%s: direction out?\n", __func__); - return -EINVAL; - } - - switch (ctrl->bRequestType & USB_RECIP_MASK) { - case USB_RECIP_DEVICE: - reply = cpu_to_le16(0); /* bit 0 => self powered, - * bit 1 => remote wakeup */ - break; - - case USB_RECIP_INTERFACE: - /* currently, the data result should be zero */ - reply = cpu_to_le16(0); - break; - - case USB_RECIP_ENDPOINT: - ep = ep_from_windex(hsotg, le16_to_cpu(ctrl->wIndex)); - if (!ep) - return -ENOENT; - - reply = cpu_to_le16(ep->halted ? 1 : 0); - break; - - default: - return 0; - } - - if (le16_to_cpu(ctrl->wLength) != 2) - return -EINVAL; - - ret = s3c_hsotg_send_reply(hsotg, ep0, &reply, 2); - if (ret) { - dev_err(hsotg->dev, "%s: failed to send reply\n", __func__); - return ret; - } - - return 1; -} - -static int s3c_hsotg_ep_sethalt(struct usb_ep *ep, int value); - -/** - * get_ep_head - return the first request on the endpoint - * @hs_ep: The controller endpoint to get - * - * Get the first request on the endpoint. - */ -static struct s3c_hsotg_req *get_ep_head(struct s3c_hsotg_ep *hs_ep) -{ - if (list_empty(&hs_ep->queue)) - return NULL; - - return list_first_entry(&hs_ep->queue, struct s3c_hsotg_req, queue); -} - -/** - * s3c_hsotg_process_req_featire - process request {SET,CLEAR}_FEATURE - * @hsotg: The device state - * @ctrl: USB control request - */ -static int s3c_hsotg_process_req_feature(struct s3c_hsotg *hsotg, - struct usb_ctrlrequest *ctrl) -{ - struct s3c_hsotg_ep *ep0 = &hsotg->eps[0]; - struct s3c_hsotg_req *hs_req; - bool restart; - bool set = (ctrl->bRequest == USB_REQ_SET_FEATURE); - struct s3c_hsotg_ep *ep; - int ret; - bool halted; - - dev_dbg(hsotg->dev, "%s: %s_FEATURE\n", - __func__, set ? "SET" : "CLEAR"); - - if (ctrl->bRequestType == USB_RECIP_ENDPOINT) { - ep = ep_from_windex(hsotg, le16_to_cpu(ctrl->wIndex)); - if (!ep) { - dev_dbg(hsotg->dev, "%s: no endpoint for 0x%04x\n", - __func__, le16_to_cpu(ctrl->wIndex)); - return -ENOENT; - } - - switch (le16_to_cpu(ctrl->wValue)) { - case USB_ENDPOINT_HALT: - halted = ep->halted; - - s3c_hsotg_ep_sethalt(&ep->ep, set); - - ret = s3c_hsotg_send_reply(hsotg, ep0, NULL, 0); - if (ret) { - dev_err(hsotg->dev, - "%s: failed to send reply\n", __func__); - return ret; - } - - /* - * we have to complete all requests for ep if it was - * halted, and the halt was cleared by CLEAR_FEATURE - */ - - if (!set && halted) { - /* - * If we have request in progress, - * then complete it - */ - if (ep->req) { - hs_req = ep->req; - ep->req = NULL; - list_del_init(&hs_req->queue); - hs_req->req.complete(&ep->ep, - &hs_req->req); - } - - /* If we have pending request, then start it */ - restart = !list_empty(&ep->queue); - if (restart) { - hs_req = get_ep_head(ep); - s3c_hsotg_start_req(hsotg, ep, - hs_req, false); - } - } - - break; - - default: - return -ENOENT; - } - } else - return -ENOENT; /* currently only deal with endpoint */ - - return 1; -} - -static void s3c_hsotg_enqueue_setup(struct s3c_hsotg *hsotg); -static void s3c_hsotg_disconnect(struct s3c_hsotg *hsotg); - -/** - * s3c_hsotg_stall_ep0 - stall ep0 - * @hsotg: The device state - * - * Set stall for ep0 as response for setup request. - */ -static void s3c_hsotg_stall_ep0(struct s3c_hsotg *hsotg) { - struct s3c_hsotg_ep *ep0 = &hsotg->eps[0]; - u32 reg; - u32 ctrl; - - dev_dbg(hsotg->dev, "ep0 stall (dir=%d)\n", ep0->dir_in); - reg = (ep0->dir_in) ? DIEPCTL0 : DOEPCTL0; - - /* - * DxEPCTL_Stall will be cleared by EP once it has - * taken effect, so no need to clear later. - */ - - ctrl = readl(hsotg->regs + reg); - ctrl |= DxEPCTL_Stall; - ctrl |= DxEPCTL_CNAK; - writel(ctrl, hsotg->regs + reg); - - dev_dbg(hsotg->dev, - "written DxEPCTL=0x%08x to %08x (DxEPCTL=0x%08x)\n", - ctrl, reg, readl(hsotg->regs + reg)); - - /* - * complete won't be called, so we enqueue - * setup request here - */ - s3c_hsotg_enqueue_setup(hsotg); -} - -/** - * s3c_hsotg_process_control - process a control request - * @hsotg: The device state - * @ctrl: The control request received - * - * The controller has received the SETUP phase of a control request, and - * needs to work out what to do next (and whether to pass it on to the - * gadget driver). - */ -static void s3c_hsotg_process_control(struct s3c_hsotg *hsotg, - struct usb_ctrlrequest *ctrl) -{ - struct s3c_hsotg_ep *ep0 = &hsotg->eps[0]; - int ret = 0; - u32 dcfg; - - ep0->sent_zlp = 0; - - dev_dbg(hsotg->dev, "ctrl Req=%02x, Type=%02x, V=%04x, L=%04x\n", - ctrl->bRequest, ctrl->bRequestType, - ctrl->wValue, ctrl->wLength); - - /* - * record the direction of the request, for later use when enquing - * packets onto EP0. - */ - - ep0->dir_in = (ctrl->bRequestType & USB_DIR_IN) ? 1 : 0; - dev_dbg(hsotg->dev, "ctrl: dir_in=%d\n", ep0->dir_in); - - /* - * if we've no data with this request, then the last part of the - * transaction is going to implicitly be IN. - */ - if (ctrl->wLength == 0) - ep0->dir_in = 1; - - if ((ctrl->bRequestType & USB_TYPE_MASK) == USB_TYPE_STANDARD) { - switch (ctrl->bRequest) { - case USB_REQ_SET_ADDRESS: - s3c_hsotg_disconnect(hsotg); - dcfg = readl(hsotg->regs + DCFG); - dcfg &= ~DCFG_DevAddr_MASK; - dcfg |= ctrl->wValue << DCFG_DevAddr_SHIFT; - writel(dcfg, hsotg->regs + DCFG); - - dev_info(hsotg->dev, "new address %d\n", ctrl->wValue); - - ret = s3c_hsotg_send_reply(hsotg, ep0, NULL, 0); - return; - - case USB_REQ_GET_STATUS: - ret = s3c_hsotg_process_req_status(hsotg, ctrl); - break; - - case USB_REQ_CLEAR_FEATURE: - case USB_REQ_SET_FEATURE: - ret = s3c_hsotg_process_req_feature(hsotg, ctrl); - break; - } - } - - /* as a fallback, try delivering it to the driver to deal with */ - - if (ret == 0 && hsotg->driver) { - spin_unlock(&hsotg->lock); - ret = hsotg->driver->setup(&hsotg->gadget, ctrl); - spin_lock(&hsotg->lock); - if (ret < 0) - dev_dbg(hsotg->dev, "driver->setup() ret %d\n", ret); - } - - /* - * the request is either unhandlable, or is not formatted correctly - * so respond with a STALL for the status stage to indicate failure. - */ - - if (ret < 0) - s3c_hsotg_stall_ep0(hsotg); -} - -/** - * s3c_hsotg_complete_setup - completion of a setup transfer - * @ep: The endpoint the request was on. - * @req: The request completed. - * - * Called on completion of any requests the driver itself submitted for - * EP0 setup packets - */ -static void s3c_hsotg_complete_setup(struct usb_ep *ep, - struct usb_request *req) -{ - struct s3c_hsotg_ep *hs_ep = our_ep(ep); - struct s3c_hsotg *hsotg = hs_ep->parent; - - if (req->status < 0) { - dev_dbg(hsotg->dev, "%s: failed %d\n", __func__, req->status); - return; - } - - spin_lock(&hsotg->lock); - if (req->actual == 0) - s3c_hsotg_enqueue_setup(hsotg); - else - s3c_hsotg_process_control(hsotg, req->buf); - spin_unlock(&hsotg->lock); -} - -/** - * s3c_hsotg_enqueue_setup - start a request for EP0 packets - * @hsotg: The device state. - * - * Enqueue a request on EP0 if necessary to received any SETUP packets - * received from the host. - */ -static void s3c_hsotg_enqueue_setup(struct s3c_hsotg *hsotg) -{ - struct usb_request *req = hsotg->ctrl_req; - struct s3c_hsotg_req *hs_req = our_req(req); - int ret; - - dev_dbg(hsotg->dev, "%s: queueing setup request\n", __func__); - - req->zero = 0; - req->length = 8; - req->buf = hsotg->ctrl_buff; - req->complete = s3c_hsotg_complete_setup; - - if (!list_empty(&hs_req->queue)) { - dev_dbg(hsotg->dev, "%s already queued???\n", __func__); - return; - } - - hsotg->eps[0].dir_in = 0; - - ret = s3c_hsotg_ep_queue(&hsotg->eps[0].ep, req, GFP_ATOMIC); - if (ret < 0) { - dev_err(hsotg->dev, "%s: failed queue (%d)\n", __func__, ret); - /* - * Don't think there's much we can do other than watch the - * driver fail. - */ - } -} - -/** - * s3c_hsotg_complete_request - complete a request given to us - * @hsotg: The device state. - * @hs_ep: The endpoint the request was on. - * @hs_req: The request to complete. - * @result: The result code (0 => Ok, otherwise errno) - * - * The given request has finished, so call the necessary completion - * if it has one and then look to see if we can start a new request - * on the endpoint. - * - * Note, expects the ep to already be locked as appropriate. - */ -static void s3c_hsotg_complete_request(struct s3c_hsotg *hsotg, - struct s3c_hsotg_ep *hs_ep, - struct s3c_hsotg_req *hs_req, - int result) -{ - bool restart; - - if (!hs_req) { - dev_dbg(hsotg->dev, "%s: nothing to complete?\n", __func__); - return; - } - - dev_dbg(hsotg->dev, "complete: ep %p %s, req %p, %d => %p\n", - hs_ep, hs_ep->ep.name, hs_req, result, hs_req->req.complete); - - /* - * only replace the status if we've not already set an error - * from a previous transaction - */ - - if (hs_req->req.status == -EINPROGRESS) - hs_req->req.status = result; - - hs_ep->req = NULL; - list_del_init(&hs_req->queue); - - if (using_dma(hsotg)) - s3c_hsotg_unmap_dma(hsotg, hs_ep, hs_req); - - /* - * call the complete request with the locks off, just in case the - * request tries to queue more work for this endpoint. - */ - - if (hs_req->req.complete) { - spin_unlock(&hsotg->lock); - hs_req->req.complete(&hs_ep->ep, &hs_req->req); - spin_lock(&hsotg->lock); - } - - /* - * Look to see if there is anything else to do. Note, the completion - * of the previous request may have caused a new request to be started - * so be careful when doing this. - */ - - if (!hs_ep->req && result >= 0) { - restart = !list_empty(&hs_ep->queue); - if (restart) { - hs_req = get_ep_head(hs_ep); - s3c_hsotg_start_req(hsotg, hs_ep, hs_req, false); - } - } -} - -/** - * s3c_hsotg_rx_data - receive data from the FIFO for an endpoint - * @hsotg: The device state. - * @ep_idx: The endpoint index for the data - * @size: The size of data in the fifo, in bytes - * - * The FIFO status shows there is data to read from the FIFO for a given - * endpoint, so sort out whether we need to read the data into a request - * that has been made for that endpoint. - */ -static void s3c_hsotg_rx_data(struct s3c_hsotg *hsotg, int ep_idx, int size) -{ - struct s3c_hsotg_ep *hs_ep = &hsotg->eps[ep_idx]; - struct s3c_hsotg_req *hs_req = hs_ep->req; - void __iomem *fifo = hsotg->regs + EPFIFO(ep_idx); - int to_read; - int max_req; - int read_ptr; - - - if (!hs_req) { - u32 epctl = readl(hsotg->regs + DOEPCTL(ep_idx)); - int ptr; - - dev_warn(hsotg->dev, - "%s: FIFO %d bytes on ep%d but no req (DxEPCTl=0x%08x)\n", - __func__, size, ep_idx, epctl); - - /* dump the data from the FIFO, we've nothing we can do */ - for (ptr = 0; ptr < size; ptr += 4) - (void)readl(fifo); - - return; - } - - to_read = size; - read_ptr = hs_req->req.actual; - max_req = hs_req->req.length - read_ptr; - - dev_dbg(hsotg->dev, "%s: read %d/%d, done %d/%d\n", - __func__, to_read, max_req, read_ptr, hs_req->req.length); - - if (to_read > max_req) { - /* - * more data appeared than we where willing - * to deal with in this request. - */ - - /* currently we don't deal this */ - WARN_ON_ONCE(1); - } - - hs_ep->total_data += to_read; - hs_req->req.actual += to_read; - to_read = DIV_ROUND_UP(to_read, 4); - - /* - * note, we might over-write the buffer end by 3 bytes depending on - * alignment of the data. - */ - ioread32_rep(fifo, hs_req->req.buf + read_ptr, to_read); -} - -/** - * s3c_hsotg_send_zlp - send zero-length packet on control endpoint - * @hsotg: The device instance - * @req: The request currently on this endpoint - * - * Generate a zero-length IN packet request for terminating a SETUP - * transaction. - * - * Note, since we don't write any data to the TxFIFO, then it is - * currently believed that we do not need to wait for any space in - * the TxFIFO. - */ -static void s3c_hsotg_send_zlp(struct s3c_hsotg *hsotg, - struct s3c_hsotg_req *req) -{ - u32 ctrl; - - if (!req) { - dev_warn(hsotg->dev, "%s: no request?\n", __func__); - return; - } - - if (req->req.length == 0) { - hsotg->eps[0].sent_zlp = 1; - s3c_hsotg_enqueue_setup(hsotg); - return; - } - - hsotg->eps[0].dir_in = 1; - hsotg->eps[0].sent_zlp = 1; - - dev_dbg(hsotg->dev, "sending zero-length packet\n"); - - /* issue a zero-sized packet to terminate this */ - writel(DxEPTSIZ_MC(1) | DxEPTSIZ_PktCnt(1) | - DxEPTSIZ_XferSize(0), hsotg->regs + DIEPTSIZ(0)); - - ctrl = readl(hsotg->regs + DIEPCTL0); - ctrl |= DxEPCTL_CNAK; /* clear NAK set by core */ - ctrl |= DxEPCTL_EPEna; /* ensure ep enabled */ - ctrl |= DxEPCTL_USBActEp; - writel(ctrl, hsotg->regs + DIEPCTL0); -} - -/** - * s3c_hsotg_handle_outdone - handle receiving OutDone/SetupDone from RXFIFO - * @hsotg: The device instance - * @epnum: The endpoint received from - * @was_setup: Set if processing a SetupDone event. - * - * The RXFIFO has delivered an OutDone event, which means that the data - * transfer for an OUT endpoint has been completed, either by a short - * packet or by the finish of a transfer. - */ -static void s3c_hsotg_handle_outdone(struct s3c_hsotg *hsotg, - int epnum, bool was_setup) -{ - u32 epsize = readl(hsotg->regs + DOEPTSIZ(epnum)); - struct s3c_hsotg_ep *hs_ep = &hsotg->eps[epnum]; - struct s3c_hsotg_req *hs_req = hs_ep->req; - struct usb_request *req = &hs_req->req; - unsigned size_left = DxEPTSIZ_XferSize_GET(epsize); - int result = 0; - - if (!hs_req) { - dev_dbg(hsotg->dev, "%s: no request active\n", __func__); - return; - } - - if (using_dma(hsotg)) { - unsigned size_done; - - /* - * Calculate the size of the transfer by checking how much - * is left in the endpoint size register and then working it - * out from the amount we loaded for the transfer. - * - * We need to do this as DMA pointers are always 32bit aligned - * so may overshoot/undershoot the transfer. - */ - - size_done = hs_ep->size_loaded - size_left; - size_done += hs_ep->last_load; - - req->actual = size_done; - } - - /* if there is more request to do, schedule new transfer */ - if (req->actual < req->length && size_left == 0) { - s3c_hsotg_start_req(hsotg, hs_ep, hs_req, true); - return; - } else if (epnum == 0) { - /* - * After was_setup = 1 => - * set CNAK for non Setup requests - */ - hsotg->setup = was_setup ? 0 : 1; - } - - if (req->actual < req->length && req->short_not_ok) { - dev_dbg(hsotg->dev, "%s: got %d/%d (short not ok) => error\n", - __func__, req->actual, req->length); - - /* - * todo - what should we return here? there's no one else - * even bothering to check the status. - */ - } - - if (epnum == 0) { - /* - * Condition req->complete != s3c_hsotg_complete_setup says: - * send ZLP when we have an asynchronous request from gadget - */ - if (!was_setup && req->complete != s3c_hsotg_complete_setup) - s3c_hsotg_send_zlp(hsotg, hs_req); - } - - s3c_hsotg_complete_request(hsotg, hs_ep, hs_req, result); -} - -/** - * s3c_hsotg_read_frameno - read current frame number - * @hsotg: The device instance - * - * Return the current frame number - */ -static u32 s3c_hsotg_read_frameno(struct s3c_hsotg *hsotg) -{ - u32 dsts; - - dsts = readl(hsotg->regs + DSTS); - dsts &= DSTS_SOFFN_MASK; - dsts >>= DSTS_SOFFN_SHIFT; - - return dsts; -} - -/** - * s3c_hsotg_handle_rx - RX FIFO has data - * @hsotg: The device instance - * - * The IRQ handler has detected that the RX FIFO has some data in it - * that requires processing, so find out what is in there and do the - * appropriate read. - * - * The RXFIFO is a true FIFO, the packets coming out are still in packet - * chunks, so if you have x packets received on an endpoint you'll get x - * FIFO events delivered, each with a packet's worth of data in it. - * - * When using DMA, we should not be processing events from the RXFIFO - * as the actual data should be sent to the memory directly and we turn - * on the completion interrupts to get notifications of transfer completion. - */ -static void s3c_hsotg_handle_rx(struct s3c_hsotg *hsotg) -{ - u32 grxstsr = readl(hsotg->regs + GRXSTSP); - u32 epnum, status, size; - - WARN_ON(using_dma(hsotg)); - - epnum = grxstsr & GRXSTS_EPNum_MASK; - status = grxstsr & GRXSTS_PktSts_MASK; - - size = grxstsr & GRXSTS_ByteCnt_MASK; - size >>= GRXSTS_ByteCnt_SHIFT; - - if (1) - dev_dbg(hsotg->dev, "%s: GRXSTSP=0x%08x (%d@%d)\n", - __func__, grxstsr, size, epnum); - -#define __status(x) ((x) >> GRXSTS_PktSts_SHIFT) - - switch (status >> GRXSTS_PktSts_SHIFT) { - case __status(GRXSTS_PktSts_GlobalOutNAK): - dev_dbg(hsotg->dev, "GlobalOutNAK\n"); - break; - - case __status(GRXSTS_PktSts_OutDone): - dev_dbg(hsotg->dev, "OutDone (Frame=0x%08x)\n", - s3c_hsotg_read_frameno(hsotg)); - - if (!using_dma(hsotg)) - s3c_hsotg_handle_outdone(hsotg, epnum, false); - break; - - case __status(GRXSTS_PktSts_SetupDone): - dev_dbg(hsotg->dev, - "SetupDone (Frame=0x%08x, DOPEPCTL=0x%08x)\n", - s3c_hsotg_read_frameno(hsotg), - readl(hsotg->regs + DOEPCTL(0))); - - s3c_hsotg_handle_outdone(hsotg, epnum, true); - break; - - case __status(GRXSTS_PktSts_OutRX): - s3c_hsotg_rx_data(hsotg, epnum, size); - break; - - case __status(GRXSTS_PktSts_SetupRX): - dev_dbg(hsotg->dev, - "SetupRX (Frame=0x%08x, DOPEPCTL=0x%08x)\n", - s3c_hsotg_read_frameno(hsotg), - readl(hsotg->regs + DOEPCTL(0))); - - s3c_hsotg_rx_data(hsotg, epnum, size); - break; - - default: - dev_warn(hsotg->dev, "%s: unknown status %08x\n", - __func__, grxstsr); - - s3c_hsotg_dump(hsotg); - break; - } -} - -/** - * s3c_hsotg_ep0_mps - turn max packet size into register setting - * @mps: The maximum packet size in bytes. - */ -static u32 s3c_hsotg_ep0_mps(unsigned int mps) -{ - switch (mps) { - case 64: - return D0EPCTL_MPS_64; - case 32: - return D0EPCTL_MPS_32; - case 16: - return D0EPCTL_MPS_16; - case 8: - return D0EPCTL_MPS_8; - } - - /* bad max packet size, warn and return invalid result */ - WARN_ON(1); - return (u32)-1; -} - -/** - * s3c_hsotg_set_ep_maxpacket - set endpoint's max-packet field - * @hsotg: The driver state. - * @ep: The index number of the endpoint - * @mps: The maximum packet size in bytes - * - * Configure the maximum packet size for the given endpoint, updating - * the hardware control registers to reflect this. - */ -static void s3c_hsotg_set_ep_maxpacket(struct s3c_hsotg *hsotg, - unsigned int ep, unsigned int mps) -{ - struct s3c_hsotg_ep *hs_ep = &hsotg->eps[ep]; - void __iomem *regs = hsotg->regs; - u32 mpsval; - u32 mcval; - u32 reg; - - if (ep == 0) { - /* EP0 is a special case */ - mpsval = s3c_hsotg_ep0_mps(mps); - if (mpsval > 3) - goto bad_mps; - hs_ep->ep.maxpacket = mps; - hs_ep->mc = 1; - } else { - mpsval = mps & DxEPCTL_MPS_MASK; - if (mpsval > 1024) - goto bad_mps; - mcval = ((mps >> 11) & 0x3) + 1; - hs_ep->mc = mcval; - if (mcval > 3) - goto bad_mps; - hs_ep->ep.maxpacket = mpsval; - } - - /* - * update both the in and out endpoint controldir_ registers, even - * if one of the directions may not be in use. - */ - - reg = readl(regs + DIEPCTL(ep)); - reg &= ~DxEPCTL_MPS_MASK; - reg |= mpsval; - writel(reg, regs + DIEPCTL(ep)); - - if (ep) { - reg = readl(regs + DOEPCTL(ep)); - reg &= ~DxEPCTL_MPS_MASK; - reg |= mpsval; - writel(reg, regs + DOEPCTL(ep)); - } - - return; - -bad_mps: - dev_err(hsotg->dev, "ep%d: bad mps of %d\n", ep, mps); -} - -/** - * s3c_hsotg_txfifo_flush - flush Tx FIFO - * @hsotg: The driver state - * @idx: The index for the endpoint (0..15) - */ -static void s3c_hsotg_txfifo_flush(struct s3c_hsotg *hsotg, unsigned int idx) -{ - int timeout; - int val; - - writel(GRSTCTL_TxFNum(idx) | GRSTCTL_TxFFlsh, - hsotg->regs + GRSTCTL); - - /* wait until the fifo is flushed */ - timeout = 100; - - while (1) { - val = readl(hsotg->regs + GRSTCTL); - - if ((val & (GRSTCTL_TxFFlsh)) == 0) - break; - - if (--timeout == 0) { - dev_err(hsotg->dev, - "%s: timeout flushing fifo (GRSTCTL=%08x)\n", - __func__, val); - } - - udelay(1); - } -} - -/** - * s3c_hsotg_trytx - check to see if anything needs transmitting - * @hsotg: The driver state - * @hs_ep: The driver endpoint to check. - * - * Check to see if there is a request that has data to send, and if so - * make an attempt to write data into the FIFO. - */ -static int s3c_hsotg_trytx(struct s3c_hsotg *hsotg, - struct s3c_hsotg_ep *hs_ep) -{ - struct s3c_hsotg_req *hs_req = hs_ep->req; - - if (!hs_ep->dir_in || !hs_req) { - /** - * if request is not enqueued, we disable interrupts - * for endpoints, excepting ep0 - */ - if (hs_ep->index != 0) - s3c_hsotg_ctrl_epint(hsotg, hs_ep->index, - hs_ep->dir_in, 0); - return 0; - } - - if (hs_req->req.actual < hs_req->req.length) { - dev_dbg(hsotg->dev, "trying to write more for ep%d\n", - hs_ep->index); - return s3c_hsotg_write_fifo(hsotg, hs_ep, hs_req); - } - - return 0; -} - -/** - * s3c_hsotg_complete_in - complete IN transfer - * @hsotg: The device state. - * @hs_ep: The endpoint that has just completed. - * - * An IN transfer has been completed, update the transfer's state and then - * call the relevant completion routines. - */ -static void s3c_hsotg_complete_in(struct s3c_hsotg *hsotg, - struct s3c_hsotg_ep *hs_ep) -{ - struct s3c_hsotg_req *hs_req = hs_ep->req; - u32 epsize = readl(hsotg->regs + DIEPTSIZ(hs_ep->index)); - int size_left, size_done; - - if (!hs_req) { - dev_dbg(hsotg->dev, "XferCompl but no req\n"); - return; - } - - /* Finish ZLP handling for IN EP0 transactions */ - if (hsotg->eps[0].sent_zlp) { - dev_dbg(hsotg->dev, "zlp packet received\n"); - s3c_hsotg_complete_request(hsotg, hs_ep, hs_req, 0); - return; - } - - /* - * Calculate the size of the transfer by checking how much is left - * in the endpoint size register and then working it out from - * the amount we loaded for the transfer. - * - * We do this even for DMA, as the transfer may have incremented - * past the end of the buffer (DMA transfers are always 32bit - * aligned). - */ - - size_left = DxEPTSIZ_XferSize_GET(epsize); - - size_done = hs_ep->size_loaded - size_left; - size_done += hs_ep->last_load; - - if (hs_req->req.actual != size_done) - dev_dbg(hsotg->dev, "%s: adjusting size done %d => %d\n", - __func__, hs_req->req.actual, size_done); - - hs_req->req.actual = size_done; - dev_dbg(hsotg->dev, "req->length:%d req->actual:%d req->zero:%d\n", - hs_req->req.length, hs_req->req.actual, hs_req->req.zero); - - /* - * Check if dealing with Maximum Packet Size(MPS) IN transfer at EP0 - * When sent data is a multiple MPS size (e.g. 64B ,128B ,192B - * ,256B ... ), after last MPS sized packet send IN ZLP packet to - * inform the host that no more data is available. - * The state of req.zero member is checked to be sure that the value to - * send is smaller than wValue expected from host. - * Check req.length to NOT send another ZLP when the current one is - * under completion (the one for which this completion has been called). - */ - if (hs_req->req.length && hs_ep->index == 0 && hs_req->req.zero && - hs_req->req.length == hs_req->req.actual && - !(hs_req->req.length % hs_ep->ep.maxpacket)) { - - dev_dbg(hsotg->dev, "ep0 zlp IN packet sent\n"); - s3c_hsotg_send_zlp(hsotg, hs_req); - - return; - } - - if (!size_left && hs_req->req.actual < hs_req->req.length) { - dev_dbg(hsotg->dev, "%s trying more for req...\n", __func__); - s3c_hsotg_start_req(hsotg, hs_ep, hs_req, true); - } else - s3c_hsotg_complete_request(hsotg, hs_ep, hs_req, 0); -} - -/** - * s3c_hsotg_epint - handle an in/out endpoint interrupt - * @hsotg: The driver state - * @idx: The index for the endpoint (0..15) - * @dir_in: Set if this is an IN endpoint - * - * Process and clear any interrupt pending for an individual endpoint - */ -static void s3c_hsotg_epint(struct s3c_hsotg *hsotg, unsigned int idx, - int dir_in) -{ - struct s3c_hsotg_ep *hs_ep = &hsotg->eps[idx]; - u32 epint_reg = dir_in ? DIEPINT(idx) : DOEPINT(idx); - u32 epctl_reg = dir_in ? DIEPCTL(idx) : DOEPCTL(idx); - u32 epsiz_reg = dir_in ? DIEPTSIZ(idx) : DOEPTSIZ(idx); - u32 ints; - u32 ctrl; - - ints = readl(hsotg->regs + epint_reg); - ctrl = readl(hsotg->regs + epctl_reg); - - /* Clear endpoint interrupts */ - writel(ints, hsotg->regs + epint_reg); - - dev_dbg(hsotg->dev, "%s: ep%d(%s) DxEPINT=0x%08x\n", - __func__, idx, dir_in ? "in" : "out", ints); - - if (ints & DxEPINT_XferCompl) { - if (hs_ep->isochronous && hs_ep->interval == 1) { - if (ctrl & DxEPCTL_EOFrNum) - ctrl |= DxEPCTL_SetEvenFr; - else - ctrl |= DxEPCTL_SetOddFr; - writel(ctrl, hsotg->regs + epctl_reg); - } - - dev_dbg(hsotg->dev, - "%s: XferCompl: DxEPCTL=0x%08x, DxEPTSIZ=%08x\n", - __func__, readl(hsotg->regs + epctl_reg), - readl(hsotg->regs + epsiz_reg)); - - /* - * we get OutDone from the FIFO, so we only need to look - * at completing IN requests here - */ - if (dir_in) { - s3c_hsotg_complete_in(hsotg, hs_ep); - - if (idx == 0 && !hs_ep->req) - s3c_hsotg_enqueue_setup(hsotg); - } else if (using_dma(hsotg)) { - /* - * We're using DMA, we need to fire an OutDone here - * as we ignore the RXFIFO. - */ - - s3c_hsotg_handle_outdone(hsotg, idx, false); - } - } - - if (ints & DxEPINT_EPDisbld) { - dev_dbg(hsotg->dev, "%s: EPDisbld\n", __func__); - - if (dir_in) { - int epctl = readl(hsotg->regs + epctl_reg); - - s3c_hsotg_txfifo_flush(hsotg, idx); - - if ((epctl & DxEPCTL_Stall) && - (epctl & DxEPCTL_EPType_Bulk)) { - int dctl = readl(hsotg->regs + DCTL); - - dctl |= DCTL_CGNPInNAK; - writel(dctl, hsotg->regs + DCTL); - } - } - } - - if (ints & DxEPINT_AHBErr) - dev_dbg(hsotg->dev, "%s: AHBErr\n", __func__); - - if (ints & DxEPINT_Setup) { /* Setup or Timeout */ - dev_dbg(hsotg->dev, "%s: Setup/Timeout\n", __func__); - - if (using_dma(hsotg) && idx == 0) { - /* - * this is the notification we've received a - * setup packet. In non-DMA mode we'd get this - * from the RXFIFO, instead we need to process - * the setup here. - */ - - if (dir_in) - WARN_ON_ONCE(1); - else - s3c_hsotg_handle_outdone(hsotg, 0, true); - } - } - - if (ints & DxEPINT_Back2BackSetup) - dev_dbg(hsotg->dev, "%s: B2BSetup/INEPNakEff\n", __func__); - - if (dir_in && !hs_ep->isochronous) { - /* not sure if this is important, but we'll clear it anyway */ - if (ints & DIEPMSK_INTknTXFEmpMsk) { - dev_dbg(hsotg->dev, "%s: ep%d: INTknTXFEmpMsk\n", - __func__, idx); - } - - /* this probably means something bad is happening */ - if (ints & DIEPMSK_INTknEPMisMsk) { - dev_warn(hsotg->dev, "%s: ep%d: INTknEP\n", - __func__, idx); - } - - /* FIFO has space or is empty (see GAHBCFG) */ - if (hsotg->dedicated_fifos && - ints & DIEPMSK_TxFIFOEmpty) { - dev_dbg(hsotg->dev, "%s: ep%d: TxFIFOEmpty\n", - __func__, idx); - if (!using_dma(hsotg)) - s3c_hsotg_trytx(hsotg, hs_ep); - } - } -} - -/** - * s3c_hsotg_irq_enumdone - Handle EnumDone interrupt (enumeration done) - * @hsotg: The device state. - * - * Handle updating the device settings after the enumeration phase has - * been completed. - */ -static void s3c_hsotg_irq_enumdone(struct s3c_hsotg *hsotg) -{ - u32 dsts = readl(hsotg->regs + DSTS); - int ep0_mps = 0, ep_mps; - - /* - * This should signal the finish of the enumeration phase - * of the USB handshaking, so we should now know what rate - * we connected at. - */ - - dev_dbg(hsotg->dev, "EnumDone (DSTS=0x%08x)\n", dsts); - - /* - * note, since we're limited by the size of transfer on EP0, and - * it seems IN transfers must be a even number of packets we do - * not advertise a 64byte MPS on EP0. - */ - - /* catch both EnumSpd_FS and EnumSpd_FS48 */ - switch (dsts & DSTS_EnumSpd_MASK) { - case DSTS_EnumSpd_FS: - case DSTS_EnumSpd_FS48: - hsotg->gadget.speed = USB_SPEED_FULL; - ep0_mps = EP0_MPS_LIMIT; - ep_mps = 1023; - break; - - case DSTS_EnumSpd_HS: - hsotg->gadget.speed = USB_SPEED_HIGH; - ep0_mps = EP0_MPS_LIMIT; - ep_mps = 1024; - break; - - case DSTS_EnumSpd_LS: - hsotg->gadget.speed = USB_SPEED_LOW; - /* - * note, we don't actually support LS in this driver at the - * moment, and the documentation seems to imply that it isn't - * supported by the PHYs on some of the devices. - */ - break; - } - dev_info(hsotg->dev, "new device is %s\n", - usb_speed_string(hsotg->gadget.speed)); - - /* - * we should now know the maximum packet size for an - * endpoint, so set the endpoints to a default value. - */ - - if (ep0_mps) { - int i; - s3c_hsotg_set_ep_maxpacket(hsotg, 0, ep0_mps); - for (i = 1; i < hsotg->num_of_eps; i++) - s3c_hsotg_set_ep_maxpacket(hsotg, i, ep_mps); - } - - /* ensure after enumeration our EP0 is active */ - - s3c_hsotg_enqueue_setup(hsotg); - - dev_dbg(hsotg->dev, "EP0: DIEPCTL0=0x%08x, DOEPCTL0=0x%08x\n", - readl(hsotg->regs + DIEPCTL0), - readl(hsotg->regs + DOEPCTL0)); -} - -/** - * kill_all_requests - remove all requests from the endpoint's queue - * @hsotg: The device state. - * @ep: The endpoint the requests may be on. - * @result: The result code to use. - * @force: Force removal of any current requests - * - * Go through the requests on the given endpoint and mark them - * completed with the given result code. - */ -static void kill_all_requests(struct s3c_hsotg *hsotg, - struct s3c_hsotg_ep *ep, - int result, bool force) -{ - struct s3c_hsotg_req *req, *treq; - - list_for_each_entry_safe(req, treq, &ep->queue, queue) { - /* - * currently, we can't do much about an already - * running request on an in endpoint - */ - - if (ep->req == req && ep->dir_in && !force) - continue; - - s3c_hsotg_complete_request(hsotg, ep, req, - result); - } - if(hsotg->dedicated_fifos) - if ((readl(hsotg->regs + DTXFSTS(ep->index)) & 0xffff) * 4 < 3072) - s3c_hsotg_txfifo_flush(hsotg, ep->index); -} - -#define call_gadget(_hs, _entry) \ -do { \ - if ((_hs)->gadget.speed != USB_SPEED_UNKNOWN && \ - (_hs)->driver && (_hs)->driver->_entry) { \ - spin_unlock(&_hs->lock); \ - (_hs)->driver->_entry(&(_hs)->gadget); \ - spin_lock(&_hs->lock); \ - } \ -} while (0) - -/** - * s3c_hsotg_disconnect - disconnect service - * @hsotg: The device state. - * - * The device has been disconnected. Remove all current - * transactions and signal the gadget driver that this - * has happened. - */ -static void s3c_hsotg_disconnect(struct s3c_hsotg *hsotg) -{ - unsigned ep; - - for (ep = 0; ep < hsotg->num_of_eps; ep++) - kill_all_requests(hsotg, &hsotg->eps[ep], -ESHUTDOWN, true); - - call_gadget(hsotg, disconnect); -} - -/** - * s3c_hsotg_irq_fifoempty - TX FIFO empty interrupt handler - * @hsotg: The device state: - * @periodic: True if this is a periodic FIFO interrupt - */ -static void s3c_hsotg_irq_fifoempty(struct s3c_hsotg *hsotg, bool periodic) -{ - struct s3c_hsotg_ep *ep; - int epno, ret; - - /* look through for any more data to transmit */ - - for (epno = 0; epno < hsotg->num_of_eps; epno++) { - ep = &hsotg->eps[epno]; - - if (!ep->dir_in) - continue; - - if ((periodic && !ep->periodic) || - (!periodic && ep->periodic)) - continue; - - ret = s3c_hsotg_trytx(hsotg, ep); - if (ret < 0) - break; - } -} - -/* IRQ flags which will trigger a retry around the IRQ loop */ -#define IRQ_RETRY_MASK (GINTSTS_NPTxFEmp | \ - GINTSTS_PTxFEmp | \ - GINTSTS_RxFLvl) - -/** - * s3c_hsotg_corereset - issue softreset to the core - * @hsotg: The device state - * - * Issue a soft reset to the core, and await the core finishing it. - */ -static int s3c_hsotg_corereset(struct s3c_hsotg *hsotg) -{ - int timeout; - u32 grstctl; - - dev_dbg(hsotg->dev, "resetting core\n"); - - /* issue soft reset */ - writel(GRSTCTL_CSftRst, hsotg->regs + GRSTCTL); - - timeout = 10000; - do { - grstctl = readl(hsotg->regs + GRSTCTL); - } while ((grstctl & GRSTCTL_CSftRst) && timeout-- > 0); - - if (grstctl & GRSTCTL_CSftRst) { - dev_err(hsotg->dev, "Failed to get CSftRst asserted\n"); - return -EINVAL; - } - - timeout = 10000; - - while (1) { - u32 grstctl = readl(hsotg->regs + GRSTCTL); - - if (timeout-- < 0) { - dev_info(hsotg->dev, - "%s: reset failed, GRSTCTL=%08x\n", - __func__, grstctl); - return -ETIMEDOUT; - } - - if (!(grstctl & GRSTCTL_AHBIdle)) - continue; - - break; /* reset done */ - } - - dev_dbg(hsotg->dev, "reset successful\n"); - return 0; -} - -/** - * s3c_hsotg_core_init - issue softreset to the core - * @hsotg: The device state - * - * Issue a soft reset to the core, and await the core finishing it. - */ -static void s3c_hsotg_core_init(struct s3c_hsotg *hsotg) -{ - s3c_hsotg_corereset(hsotg); - - /* - * we must now enable ep0 ready for host detection and then - * set configuration. - */ - - /* set the PLL on, remove the HNP/SRP and set the PHY */ - writel(hsotg->phyif | GUSBCFG_TOutCal(7) | - (0x5 << 10), hsotg->regs + GUSBCFG); - - s3c_hsotg_init_fifo(hsotg); - - __orr32(hsotg->regs + DCTL, DCTL_SftDiscon); - - writel(1 << 18 | DCFG_DevSpd_HS, hsotg->regs + DCFG); - - /* Clear any pending OTG interrupts */ - writel(0xffffffff, hsotg->regs + GOTGINT); - - /* Clear any pending interrupts */ - writel(0xffffffff, hsotg->regs + GINTSTS); - - writel(GINTSTS_ErlySusp | GINTSTS_SessReqInt | - GINTSTS_GOUTNakEff | GINTSTS_GINNakEff | - GINTSTS_ConIDStsChng | GINTSTS_USBRst | - GINTSTS_EnumDone | GINTSTS_OTGInt | - GINTSTS_USBSusp | GINTSTS_WkUpInt, - hsotg->regs + GINTMSK); - - if (using_dma(hsotg)) - writel(GAHBCFG_GlblIntrEn | GAHBCFG_DMAEn | - GAHBCFG_HBstLen_Incr4, - hsotg->regs + GAHBCFG); - else - writel(((hsotg->dedicated_fifos) ? (GAHBCFG_NPTxFEmpLvl | - GAHBCFG_PTxFEmpLvl) : 0) | - GAHBCFG_GlblIntrEn, - hsotg->regs + GAHBCFG); - - /* - * If INTknTXFEmpMsk is enabled, it's important to disable ep interrupts - * when we have no data to transfer. Otherwise we get being flooded by - * interrupts. - */ - - writel(((hsotg->dedicated_fifos) ? DIEPMSK_TxFIFOEmpty | - DIEPMSK_INTknTXFEmpMsk : 0) | - DIEPMSK_EPDisbldMsk | DIEPMSK_XferComplMsk | - DIEPMSK_TimeOUTMsk | DIEPMSK_AHBErrMsk | - DIEPMSK_INTknEPMisMsk, - hsotg->regs + DIEPMSK); - - /* - * don't need XferCompl, we get that from RXFIFO in slave mode. In - * DMA mode we may need this. - */ - writel((using_dma(hsotg) ? (DIEPMSK_XferComplMsk | - DIEPMSK_TimeOUTMsk) : 0) | - DOEPMSK_EPDisbldMsk | DOEPMSK_AHBErrMsk | - DOEPMSK_SetupMsk, - hsotg->regs + DOEPMSK); - - writel(0, hsotg->regs + DAINTMSK); - - dev_dbg(hsotg->dev, "EP0: DIEPCTL0=0x%08x, DOEPCTL0=0x%08x\n", - readl(hsotg->regs + DIEPCTL0), - readl(hsotg->regs + DOEPCTL0)); - - /* enable in and out endpoint interrupts */ - s3c_hsotg_en_gsint(hsotg, GINTSTS_OEPInt | GINTSTS_IEPInt); - - /* - * Enable the RXFIFO when in slave mode, as this is how we collect - * the data. In DMA mode, we get events from the FIFO but also - * things we cannot process, so do not use it. - */ - if (!using_dma(hsotg)) - s3c_hsotg_en_gsint(hsotg, GINTSTS_RxFLvl); - - /* Enable interrupts for EP0 in and out */ - s3c_hsotg_ctrl_epint(hsotg, 0, 0, 1); - s3c_hsotg_ctrl_epint(hsotg, 0, 1, 1); - - __orr32(hsotg->regs + DCTL, DCTL_PWROnPrgDone); - udelay(10); /* see openiboot */ - __bic32(hsotg->regs + DCTL, DCTL_PWROnPrgDone); - - dev_dbg(hsotg->dev, "DCTL=0x%08x\n", readl(hsotg->regs + DCTL)); - - /* - * DxEPCTL_USBActEp says RO in manual, but seems to be set by - * writing to the EPCTL register.. - */ - - /* set to read 1 8byte packet */ - writel(DxEPTSIZ_MC(1) | DxEPTSIZ_PktCnt(1) | - DxEPTSIZ_XferSize(8), hsotg->regs + DOEPTSIZ0); - - writel(s3c_hsotg_ep0_mps(hsotg->eps[0].ep.maxpacket) | - DxEPCTL_CNAK | DxEPCTL_EPEna | - DxEPCTL_USBActEp, - hsotg->regs + DOEPCTL0); - - /* enable, but don't activate EP0in */ - writel(s3c_hsotg_ep0_mps(hsotg->eps[0].ep.maxpacket) | - DxEPCTL_USBActEp, hsotg->regs + DIEPCTL0); - - s3c_hsotg_enqueue_setup(hsotg); - - dev_dbg(hsotg->dev, "EP0: DIEPCTL0=0x%08x, DOEPCTL0=0x%08x\n", - readl(hsotg->regs + DIEPCTL0), - readl(hsotg->regs + DOEPCTL0)); - - /* clear global NAKs */ - writel(DCTL_CGOUTNak | DCTL_CGNPInNAK, - hsotg->regs + DCTL); - - /* must be at-least 3ms to allow bus to see disconnect */ - mdelay(3); - - /* remove the soft-disconnect and let's go */ - __bic32(hsotg->regs + DCTL, DCTL_SftDiscon); -} - -/** - * s3c_hsotg_irq - handle device interrupt - * @irq: The IRQ number triggered - * @pw: The pw value when registered the handler. - */ -static irqreturn_t s3c_hsotg_irq(int irq, void *pw) -{ - struct s3c_hsotg *hsotg = pw; - int retry_count = 8; - u32 gintsts; - u32 gintmsk; - - spin_lock(&hsotg->lock); -irq_retry: - gintsts = readl(hsotg->regs + GINTSTS); - gintmsk = readl(hsotg->regs + GINTMSK); - - dev_dbg(hsotg->dev, "%s: %08x %08x (%08x) retry %d\n", - __func__, gintsts, gintsts & gintmsk, gintmsk, retry_count); - - gintsts &= gintmsk; - - if (gintsts & GINTSTS_OTGInt) { - u32 otgint = readl(hsotg->regs + GOTGINT); - - dev_info(hsotg->dev, "OTGInt: %08x\n", otgint); - - writel(otgint, hsotg->regs + GOTGINT); - } - - if (gintsts & GINTSTS_SessReqInt) { - dev_dbg(hsotg->dev, "%s: SessReqInt\n", __func__); - writel(GINTSTS_SessReqInt, hsotg->regs + GINTSTS); - } - - if (gintsts & GINTSTS_EnumDone) { - writel(GINTSTS_EnumDone, hsotg->regs + GINTSTS); - - s3c_hsotg_irq_enumdone(hsotg); - } - - if (gintsts & GINTSTS_ConIDStsChng) { - dev_dbg(hsotg->dev, "ConIDStsChg (DSTS=0x%08x, GOTCTL=%08x)\n", - readl(hsotg->regs + DSTS), - readl(hsotg->regs + GOTGCTL)); - - writel(GINTSTS_ConIDStsChng, hsotg->regs + GINTSTS); - } - - if (gintsts & (GINTSTS_OEPInt | GINTSTS_IEPInt)) { - u32 daint = readl(hsotg->regs + DAINT); - u32 daintmsk = readl(hsotg->regs + DAINTMSK); - u32 daint_out, daint_in; - int ep; - - daint &= daintmsk; - daint_out = daint >> DAINT_OutEP_SHIFT; - daint_in = daint & ~(daint_out << DAINT_OutEP_SHIFT); - - dev_dbg(hsotg->dev, "%s: daint=%08x\n", __func__, daint); - - for (ep = 0; ep < 15 && daint_out; ep++, daint_out >>= 1) { - if (daint_out & 1) - s3c_hsotg_epint(hsotg, ep, 0); - } - - for (ep = 0; ep < 15 && daint_in; ep++, daint_in >>= 1) { - if (daint_in & 1) - s3c_hsotg_epint(hsotg, ep, 1); - } - } - - if (gintsts & GINTSTS_USBRst) { - - u32 usb_status = readl(hsotg->regs + GOTGCTL); - - dev_info(hsotg->dev, "%s: USBRst\n", __func__); - dev_dbg(hsotg->dev, "GNPTXSTS=%08x\n", - readl(hsotg->regs + GNPTXSTS)); - - writel(GINTSTS_USBRst, hsotg->regs + GINTSTS); - - if (usb_status & GOTGCTL_BSESVLD) { - if (time_after(jiffies, hsotg->last_rst + - msecs_to_jiffies(200))) { - - kill_all_requests(hsotg, &hsotg->eps[0], - -ECONNRESET, true); - - s3c_hsotg_core_init(hsotg); - hsotg->last_rst = jiffies; - } - } - } - - /* check both FIFOs */ - - if (gintsts & GINTSTS_NPTxFEmp) { - dev_dbg(hsotg->dev, "NPTxFEmp\n"); - - /* - * Disable the interrupt to stop it happening again - * unless one of these endpoint routines decides that - * it needs re-enabling - */ - - s3c_hsotg_disable_gsint(hsotg, GINTSTS_NPTxFEmp); - s3c_hsotg_irq_fifoempty(hsotg, false); - } - - if (gintsts & GINTSTS_PTxFEmp) { - dev_dbg(hsotg->dev, "PTxFEmp\n"); - - /* See note in GINTSTS_NPTxFEmp */ - - s3c_hsotg_disable_gsint(hsotg, GINTSTS_PTxFEmp); - s3c_hsotg_irq_fifoempty(hsotg, true); - } - - if (gintsts & GINTSTS_RxFLvl) { - /* - * note, since GINTSTS_RxFLvl doubles as FIFO-not-empty, - * we need to retry s3c_hsotg_handle_rx if this is still - * set. - */ - - s3c_hsotg_handle_rx(hsotg); - } - - if (gintsts & GINTSTS_ModeMis) { - dev_warn(hsotg->dev, "warning, mode mismatch triggered\n"); - writel(GINTSTS_ModeMis, hsotg->regs + GINTSTS); - } - - if (gintsts & GINTSTS_USBSusp) { - dev_info(hsotg->dev, "GINTSTS_USBSusp\n"); - writel(GINTSTS_USBSusp, hsotg->regs + GINTSTS); - - call_gadget(hsotg, suspend); - } - - if (gintsts & GINTSTS_WkUpInt) { - dev_info(hsotg->dev, "GINTSTS_WkUpIn\n"); - writel(GINTSTS_WkUpInt, hsotg->regs + GINTSTS); - - call_gadget(hsotg, resume); - } - - if (gintsts & GINTSTS_ErlySusp) { - dev_dbg(hsotg->dev, "GINTSTS_ErlySusp\n"); - writel(GINTSTS_ErlySusp, hsotg->regs + GINTSTS); - } - - /* - * these next two seem to crop-up occasionally causing the core - * to shutdown the USB transfer, so try clearing them and logging - * the occurrence. - */ - - if (gintsts & GINTSTS_GOUTNakEff) { - dev_info(hsotg->dev, "GOUTNakEff triggered\n"); - - writel(DCTL_CGOUTNak, hsotg->regs + DCTL); - - s3c_hsotg_dump(hsotg); - } - - if (gintsts & GINTSTS_GINNakEff) { - dev_info(hsotg->dev, "GINNakEff triggered\n"); - - writel(DCTL_CGNPInNAK, hsotg->regs + DCTL); - - s3c_hsotg_dump(hsotg); - } - - /* - * if we've had fifo events, we should try and go around the - * loop again to see if there's any point in returning yet. - */ - - if (gintsts & IRQ_RETRY_MASK && --retry_count > 0) - goto irq_retry; - - spin_unlock(&hsotg->lock); - - return IRQ_HANDLED; -} - -/** - * s3c_hsotg_ep_enable - enable the given endpoint - * @ep: The USB endpint to configure - * @desc: The USB endpoint descriptor to configure with. - * - * This is called from the USB gadget code's usb_ep_enable(). - */ -static int s3c_hsotg_ep_enable(struct usb_ep *ep, - const struct usb_endpoint_descriptor *desc) -{ - struct s3c_hsotg_ep *hs_ep = our_ep(ep); - struct s3c_hsotg *hsotg = hs_ep->parent; - unsigned long flags; - int index = hs_ep->index; - u32 epctrl_reg; - u32 epctrl; - u32 mps; - int dir_in; - int ret = 0; - - dev_dbg(hsotg->dev, - "%s: ep %s: a 0x%02x, attr 0x%02x, mps 0x%04x, intr %d\n", - __func__, ep->name, desc->bEndpointAddress, desc->bmAttributes, - desc->wMaxPacketSize, desc->bInterval); - - /* not to be called for EP0 */ - WARN_ON(index == 0); - - dir_in = (desc->bEndpointAddress & USB_ENDPOINT_DIR_MASK) ? 1 : 0; - if (dir_in != hs_ep->dir_in) { - dev_err(hsotg->dev, "%s: direction mismatch!\n", __func__); - return -EINVAL; - } - - mps = usb_endpoint_maxp(desc); - - /* note, we handle this here instead of s3c_hsotg_set_ep_maxpacket */ - - epctrl_reg = dir_in ? DIEPCTL(index) : DOEPCTL(index); - epctrl = readl(hsotg->regs + epctrl_reg); - - dev_dbg(hsotg->dev, "%s: read DxEPCTL=0x%08x from 0x%08x\n", - __func__, epctrl, epctrl_reg); - - spin_lock_irqsave(&hsotg->lock, flags); - - epctrl &= ~(DxEPCTL_EPType_MASK | DxEPCTL_MPS_MASK); - epctrl |= DxEPCTL_MPS(mps); - - /* - * mark the endpoint as active, otherwise the core may ignore - * transactions entirely for this endpoint - */ - epctrl |= DxEPCTL_USBActEp; - - /* - * set the NAK status on the endpoint, otherwise we might try and - * do something with data that we've yet got a request to process - * since the RXFIFO will take data for an endpoint even if the - * size register hasn't been set. - */ - - epctrl |= DxEPCTL_SNAK; - - /* update the endpoint state */ - s3c_hsotg_set_ep_maxpacket(hsotg, hs_ep->index, mps); - - /* default, set to non-periodic */ - hs_ep->isochronous = 0; - hs_ep->periodic = 0; - hs_ep->halted = 0; - hs_ep->interval = desc->bInterval; - - if (hs_ep->interval > 1 && hs_ep->mc > 1) - dev_err(hsotg->dev, "MC > 1 when interval is not 1\n"); - - switch (desc->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) { - case USB_ENDPOINT_XFER_ISOC: - epctrl |= DxEPCTL_EPType_Iso; - epctrl |= DxEPCTL_SetEvenFr; - hs_ep->isochronous = 1; - if (dir_in) - hs_ep->periodic = 1; - break; - - case USB_ENDPOINT_XFER_BULK: - epctrl |= DxEPCTL_EPType_Bulk; - break; - - case USB_ENDPOINT_XFER_INT: - if (dir_in) { - /* - * Allocate our TxFNum by simply using the index - * of the endpoint for the moment. We could do - * something better if the host indicates how - * many FIFOs we are expecting to use. - */ - - hs_ep->periodic = 1; - epctrl |= DxEPCTL_TxFNum(index); - } - - epctrl |= DxEPCTL_EPType_Intterupt; - break; - - case USB_ENDPOINT_XFER_CONTROL: - epctrl |= DxEPCTL_EPType_Control; - break; - } - - /* - * if the hardware has dedicated fifos, we must give each IN EP - * a unique tx-fifo even if it is non-periodic. - */ - if (dir_in && hsotg->dedicated_fifos) - epctrl |= DxEPCTL_TxFNum(index); - - /* for non control endpoints, set PID to D0 */ - if (index) - epctrl |= DxEPCTL_SetD0PID; - - dev_dbg(hsotg->dev, "%s: write DxEPCTL=0x%08x\n", - __func__, epctrl); - - writel(epctrl, hsotg->regs + epctrl_reg); - dev_dbg(hsotg->dev, "%s: read DxEPCTL=0x%08x\n", - __func__, readl(hsotg->regs + epctrl_reg)); - - /* enable the endpoint interrupt */ - s3c_hsotg_ctrl_epint(hsotg, index, dir_in, 1); - - spin_unlock_irqrestore(&hsotg->lock, flags); - return ret; -} - -/** - * s3c_hsotg_ep_disable - disable given endpoint - * @ep: The endpoint to disable. - */ -static int s3c_hsotg_ep_disable(struct usb_ep *ep) -{ - struct s3c_hsotg_ep *hs_ep = our_ep(ep); - struct s3c_hsotg *hsotg = hs_ep->parent; - int dir_in = hs_ep->dir_in; - int index = hs_ep->index; - unsigned long flags; - u32 epctrl_reg; - u32 ctrl; - - dev_info(hsotg->dev, "%s(ep %p)\n", __func__, ep); - - if (ep == &hsotg->eps[0].ep) { - dev_err(hsotg->dev, "%s: called for ep0\n", __func__); - return -EINVAL; - } - - epctrl_reg = dir_in ? DIEPCTL(index) : DOEPCTL(index); - - spin_lock_irqsave(&hsotg->lock, flags); - /* terminate all requests with shutdown */ - kill_all_requests(hsotg, hs_ep, -ESHUTDOWN, false); - - - ctrl = readl(hsotg->regs + epctrl_reg); - ctrl &= ~DxEPCTL_EPEna; - ctrl &= ~DxEPCTL_USBActEp; - ctrl |= DxEPCTL_SNAK; - - dev_dbg(hsotg->dev, "%s: DxEPCTL=0x%08x\n", __func__, ctrl); - writel(ctrl, hsotg->regs + epctrl_reg); - - /* disable endpoint interrupts */ - s3c_hsotg_ctrl_epint(hsotg, hs_ep->index, hs_ep->dir_in, 0); - - spin_unlock_irqrestore(&hsotg->lock, flags); - return 0; -} - -/** - * on_list - check request is on the given endpoint - * @ep: The endpoint to check. - * @test: The request to test if it is on the endpoint. - */ -static bool on_list(struct s3c_hsotg_ep *ep, struct s3c_hsotg_req *test) -{ - struct s3c_hsotg_req *req, *treq; - - list_for_each_entry_safe(req, treq, &ep->queue, queue) { - if (req == test) - return true; - } - - return false; -} - -/** - * s3c_hsotg_ep_dequeue - dequeue given endpoint - * @ep: The endpoint to dequeue. - * @req: The request to be removed from a queue. - */ -static int s3c_hsotg_ep_dequeue(struct usb_ep *ep, struct usb_request *req) -{ - struct s3c_hsotg_req *hs_req = our_req(req); - struct s3c_hsotg_ep *hs_ep = our_ep(ep); - struct s3c_hsotg *hs = hs_ep->parent; - unsigned long flags; - - dev_info(hs->dev, "ep_dequeue(%p,%p)\n", ep, req); - - spin_lock_irqsave(&hs->lock, flags); - - if (!on_list(hs_ep, hs_req)) { - spin_unlock_irqrestore(&hs->lock, flags); - return -EINVAL; - } - - s3c_hsotg_complete_request(hs, hs_ep, hs_req, -ECONNRESET); - spin_unlock_irqrestore(&hs->lock, flags); - - return 0; -} - -/** - * s3c_hsotg_ep_sethalt - set halt on a given endpoint - * @ep: The endpoint to set halt. - * @value: Set or unset the halt. - */ -static int s3c_hsotg_ep_sethalt(struct usb_ep *ep, int value) -{ - struct s3c_hsotg_ep *hs_ep = our_ep(ep); - struct s3c_hsotg *hs = hs_ep->parent; - int index = hs_ep->index; - u32 epreg; - u32 epctl; - u32 xfertype; - - dev_info(hs->dev, "%s(ep %p %s, %d)\n", __func__, ep, ep->name, value); - - if (index == 0) { - if (value) - s3c_hsotg_stall_ep0(hs); - else - dev_warn(hs->dev, - "%s: can't clear halt on ep0\n", __func__); - return 0; - } - - /* write both IN and OUT control registers */ - - epreg = DIEPCTL(index); - epctl = readl(hs->regs + epreg); - - if (value) { - epctl |= DxEPCTL_Stall + DxEPCTL_SNAK; - if (epctl & DxEPCTL_EPEna) - epctl |= DxEPCTL_EPDis; - } else { - epctl &= ~DxEPCTL_Stall; - xfertype = epctl & DxEPCTL_EPType_MASK; - if (xfertype == DxEPCTL_EPType_Bulk || - xfertype == DxEPCTL_EPType_Intterupt) - epctl |= DxEPCTL_SetD0PID; - } - - writel(epctl, hs->regs + epreg); - - epreg = DOEPCTL(index); - epctl = readl(hs->regs + epreg); - - if (value) - epctl |= DxEPCTL_Stall; - else { - epctl &= ~DxEPCTL_Stall; - xfertype = epctl & DxEPCTL_EPType_MASK; - if (xfertype == DxEPCTL_EPType_Bulk || - xfertype == DxEPCTL_EPType_Intterupt) - epctl |= DxEPCTL_SetD0PID; - } - - writel(epctl, hs->regs + epreg); - - hs_ep->halted = value; - - return 0; -} - -/** - * s3c_hsotg_ep_sethalt_lock - set halt on a given endpoint with lock held - * @ep: The endpoint to set halt. - * @value: Set or unset the halt. - */ -static int s3c_hsotg_ep_sethalt_lock(struct usb_ep *ep, int value) -{ - struct s3c_hsotg_ep *hs_ep = our_ep(ep); - struct s3c_hsotg *hs = hs_ep->parent; - unsigned long flags = 0; - int ret = 0; - - spin_lock_irqsave(&hs->lock, flags); - ret = s3c_hsotg_ep_sethalt(ep, value); - spin_unlock_irqrestore(&hs->lock, flags); - - return ret; -} - -static struct usb_ep_ops s3c_hsotg_ep_ops = { - .enable = s3c_hsotg_ep_enable, - .disable = s3c_hsotg_ep_disable, - .alloc_request = s3c_hsotg_ep_alloc_request, - .free_request = s3c_hsotg_ep_free_request, - .queue = s3c_hsotg_ep_queue_lock, - .dequeue = s3c_hsotg_ep_dequeue, - .set_halt = s3c_hsotg_ep_sethalt_lock, - /* note, don't believe we have any call for the fifo routines */ -}; - -/** - * s3c_hsotg_phy_enable - enable platform phy dev - * @hsotg: The driver state - * - * A wrapper for platform code responsible for controlling - * low-level USB code - */ -static void s3c_hsotg_phy_enable(struct s3c_hsotg *hsotg) -{ - struct platform_device *pdev = to_platform_device(hsotg->dev); - - dev_dbg(hsotg->dev, "pdev 0x%p\n", pdev); - - if (hsotg->phy) { - phy_init(hsotg->phy); - phy_power_on(hsotg->phy); - } else if (hsotg->uphy) - usb_phy_init(hsotg->uphy); - else if (hsotg->plat->phy_init) - hsotg->plat->phy_init(pdev, hsotg->plat->phy_type); -} - -/** - * s3c_hsotg_phy_disable - disable platform phy dev - * @hsotg: The driver state - * - * A wrapper for platform code responsible for controlling - * low-level USB code - */ -static void s3c_hsotg_phy_disable(struct s3c_hsotg *hsotg) -{ - struct platform_device *pdev = to_platform_device(hsotg->dev); - - if (hsotg->phy) { - phy_power_off(hsotg->phy); - phy_exit(hsotg->phy); - } else if (hsotg->uphy) - usb_phy_shutdown(hsotg->uphy); - else if (hsotg->plat->phy_exit) - hsotg->plat->phy_exit(pdev, hsotg->plat->phy_type); -} - -/** - * s3c_hsotg_init - initalize the usb core - * @hsotg: The driver state - */ -static void s3c_hsotg_init(struct s3c_hsotg *hsotg) -{ - /* unmask subset of endpoint interrupts */ - - writel(DIEPMSK_TimeOUTMsk | DIEPMSK_AHBErrMsk | - DIEPMSK_EPDisbldMsk | DIEPMSK_XferComplMsk, - hsotg->regs + DIEPMSK); - - writel(DOEPMSK_SetupMsk | DOEPMSK_AHBErrMsk | - DOEPMSK_EPDisbldMsk | DOEPMSK_XferComplMsk, - hsotg->regs + DOEPMSK); - - writel(0, hsotg->regs + DAINTMSK); - - /* Be in disconnected state until gadget is registered */ - __orr32(hsotg->regs + DCTL, DCTL_SftDiscon); - - if (0) { - /* post global nak until we're ready */ - writel(DCTL_SGNPInNAK | DCTL_SGOUTNak, - hsotg->regs + DCTL); - } - - /* setup fifos */ - - dev_dbg(hsotg->dev, "GRXFSIZ=0x%08x, GNPTXFSIZ=0x%08x\n", - readl(hsotg->regs + GRXFSIZ), - readl(hsotg->regs + GNPTXFSIZ)); - - s3c_hsotg_init_fifo(hsotg); - - /* set the PLL on, remove the HNP/SRP and set the PHY */ - writel(GUSBCFG_PHYIf16 | GUSBCFG_TOutCal(7) | (0x5 << 10), - hsotg->regs + GUSBCFG); - - writel(using_dma(hsotg) ? GAHBCFG_DMAEn : 0x0, - hsotg->regs + GAHBCFG); -} - -/** - * s3c_hsotg_udc_start - prepare the udc for work - * @gadget: The usb gadget state - * @driver: The usb gadget driver - * - * Perform initialization to prepare udc device and driver - * to work. - */ -static int s3c_hsotg_udc_start(struct usb_gadget *gadget, - struct usb_gadget_driver *driver) -{ - struct s3c_hsotg *hsotg = to_hsotg(gadget); - int ret; - - if (!hsotg) { - pr_err("%s: called with no device\n", __func__); - return -ENODEV; - } - - if (!driver) { - dev_err(hsotg->dev, "%s: no driver\n", __func__); - return -EINVAL; - } - - if (driver->max_speed < USB_SPEED_FULL) - dev_err(hsotg->dev, "%s: bad speed\n", __func__); - - if (!driver->setup) { - dev_err(hsotg->dev, "%s: missing entry points\n", __func__); - return -EINVAL; - } - - WARN_ON(hsotg->driver); - - driver->driver.bus = NULL; - hsotg->driver = driver; - hsotg->gadget.dev.of_node = hsotg->dev->of_node; - hsotg->gadget.speed = USB_SPEED_UNKNOWN; - - ret = regulator_bulk_enable(ARRAY_SIZE(hsotg->supplies), - hsotg->supplies); - if (ret) { - dev_err(hsotg->dev, "failed to enable supplies: %d\n", ret); - goto err; - } - - hsotg->last_rst = jiffies; - dev_info(hsotg->dev, "bound driver %s\n", driver->driver.name); - return 0; - -err: - hsotg->driver = NULL; - return ret; -} - -/** - * s3c_hsotg_udc_stop - stop the udc - * @gadget: The usb gadget state - * @driver: The usb gadget driver - * - * Stop udc hw block and stay tunned for future transmissions - */ -static int s3c_hsotg_udc_stop(struct usb_gadget *gadget, - struct usb_gadget_driver *driver) -{ - struct s3c_hsotg *hsotg = to_hsotg(gadget); - unsigned long flags = 0; - int ep; - - if (!hsotg) - return -ENODEV; - - /* all endpoints should be shutdown */ - for (ep = 0; ep < hsotg->num_of_eps; ep++) - s3c_hsotg_ep_disable(&hsotg->eps[ep].ep); - - spin_lock_irqsave(&hsotg->lock, flags); - - s3c_hsotg_phy_disable(hsotg); - - if (!driver) - hsotg->driver = NULL; - - hsotg->gadget.speed = USB_SPEED_UNKNOWN; - - spin_unlock_irqrestore(&hsotg->lock, flags); - - regulator_bulk_disable(ARRAY_SIZE(hsotg->supplies), hsotg->supplies); - - return 0; -} - -/** - * s3c_hsotg_gadget_getframe - read the frame number - * @gadget: The usb gadget state - * - * Read the {micro} frame number - */ -static int s3c_hsotg_gadget_getframe(struct usb_gadget *gadget) -{ - return s3c_hsotg_read_frameno(to_hsotg(gadget)); -} - -/** - * s3c_hsotg_pullup - connect/disconnect the USB PHY - * @gadget: The usb gadget state - * @is_on: Current state of the USB PHY - * - * Connect/Disconnect the USB PHY pullup - */ -static int s3c_hsotg_pullup(struct usb_gadget *gadget, int is_on) -{ - struct s3c_hsotg *hsotg = to_hsotg(gadget); - unsigned long flags = 0; - - dev_dbg(hsotg->dev, "%s: is_in: %d\n", __func__, is_on); - - spin_lock_irqsave(&hsotg->lock, flags); - if (is_on) { - s3c_hsotg_phy_enable(hsotg); - s3c_hsotg_core_init(hsotg); - } else { - s3c_hsotg_disconnect(hsotg); - s3c_hsotg_phy_disable(hsotg); - } - - hsotg->gadget.speed = USB_SPEED_UNKNOWN; - spin_unlock_irqrestore(&hsotg->lock, flags); - - return 0; -} - -static const struct usb_gadget_ops s3c_hsotg_gadget_ops = { - .get_frame = s3c_hsotg_gadget_getframe, - .udc_start = s3c_hsotg_udc_start, - .udc_stop = s3c_hsotg_udc_stop, - .pullup = s3c_hsotg_pullup, -}; - -/** - * s3c_hsotg_initep - initialise a single endpoint - * @hsotg: The device state. - * @hs_ep: The endpoint to be initialised. - * @epnum: The endpoint number - * - * Initialise the given endpoint (as part of the probe and device state - * creation) to give to the gadget driver. Setup the endpoint name, any - * direction information and other state that may be required. - */ -static void s3c_hsotg_initep(struct s3c_hsotg *hsotg, - struct s3c_hsotg_ep *hs_ep, - int epnum) -{ - u32 ptxfifo; - char *dir; - - if (epnum == 0) - dir = ""; - else if ((epnum % 2) == 0) { - dir = "out"; - } else { - dir = "in"; - hs_ep->dir_in = 1; - } - - hs_ep->index = epnum; - - snprintf(hs_ep->name, sizeof(hs_ep->name), "ep%d%s", epnum, dir); - - INIT_LIST_HEAD(&hs_ep->queue); - INIT_LIST_HEAD(&hs_ep->ep.ep_list); - - /* add to the list of endpoints known by the gadget driver */ - if (epnum) - list_add_tail(&hs_ep->ep.ep_list, &hsotg->gadget.ep_list); - - hs_ep->parent = hsotg; - hs_ep->ep.name = hs_ep->name; - usb_ep_set_maxpacket_limit(&hs_ep->ep, epnum ? 1024 : EP0_MPS_LIMIT); - hs_ep->ep.ops = &s3c_hsotg_ep_ops; - - /* - * Read the FIFO size for the Periodic TX FIFO, even if we're - * an OUT endpoint, we may as well do this if in future the - * code is changed to make each endpoint's direction changeable. - */ - - ptxfifo = readl(hsotg->regs + DPTXFSIZn(epnum)); - hs_ep->fifo_size = DPTXFSIZn_DPTxFSize_GET(ptxfifo) * 4; - - /* - * if we're using dma, we need to set the next-endpoint pointer - * to be something valid. - */ - - if (using_dma(hsotg)) { - u32 next = DxEPCTL_NextEp((epnum + 1) % 15); - writel(next, hsotg->regs + DIEPCTL(epnum)); - writel(next, hsotg->regs + DOEPCTL(epnum)); - } -} - -/** - * s3c_hsotg_hw_cfg - read HW configuration registers - * @param: The device state - * - * Read the USB core HW configuration registers - */ -static void s3c_hsotg_hw_cfg(struct s3c_hsotg *hsotg) -{ - u32 cfg2, cfg4; - /* check hardware configuration */ - - cfg2 = readl(hsotg->regs + 0x48); - hsotg->num_of_eps = (cfg2 >> 10) & 0xF; - - dev_info(hsotg->dev, "EPs:%d\n", hsotg->num_of_eps); - - cfg4 = readl(hsotg->regs + 0x50); - hsotg->dedicated_fifos = (cfg4 >> 25) & 1; - - dev_info(hsotg->dev, "%s fifos\n", - hsotg->dedicated_fifos ? "dedicated" : "shared"); -} - -/** - * s3c_hsotg_dump - dump state of the udc - * @param: The device state - */ -static void s3c_hsotg_dump(struct s3c_hsotg *hsotg) -{ -#ifdef DEBUG - struct device *dev = hsotg->dev; - void __iomem *regs = hsotg->regs; - u32 val; - int idx; - - dev_info(dev, "DCFG=0x%08x, DCTL=0x%08x, DIEPMSK=%08x\n", - readl(regs + DCFG), readl(regs + DCTL), - readl(regs + DIEPMSK)); - - dev_info(dev, "GAHBCFG=0x%08x, 0x44=0x%08x\n", - readl(regs + GAHBCFG), readl(regs + 0x44)); - - dev_info(dev, "GRXFSIZ=0x%08x, GNPTXFSIZ=0x%08x\n", - readl(regs + GRXFSIZ), readl(regs + GNPTXFSIZ)); - - /* show periodic fifo settings */ - - for (idx = 1; idx <= 15; idx++) { - val = readl(regs + DPTXFSIZn(idx)); - dev_info(dev, "DPTx[%d] FSize=%d, StAddr=0x%08x\n", idx, - val >> DPTXFSIZn_DPTxFSize_SHIFT, - val & DPTXFSIZn_DPTxFStAddr_MASK); - } - - for (idx = 0; idx < 15; idx++) { - dev_info(dev, - "ep%d-in: EPCTL=0x%08x, SIZ=0x%08x, DMA=0x%08x\n", idx, - readl(regs + DIEPCTL(idx)), - readl(regs + DIEPTSIZ(idx)), - readl(regs + DIEPDMA(idx))); - - val = readl(regs + DOEPCTL(idx)); - dev_info(dev, - "ep%d-out: EPCTL=0x%08x, SIZ=0x%08x, DMA=0x%08x\n", - idx, readl(regs + DOEPCTL(idx)), - readl(regs + DOEPTSIZ(idx)), - readl(regs + DOEPDMA(idx))); - - } - - dev_info(dev, "DVBUSDIS=0x%08x, DVBUSPULSE=%08x\n", - readl(regs + DVBUSDIS), readl(regs + DVBUSPULSE)); -#endif -} - -/** - * state_show - debugfs: show overall driver and device state. - * @seq: The seq file to write to. - * @v: Unused parameter. - * - * This debugfs entry shows the overall state of the hardware and - * some general information about each of the endpoints available - * to the system. - */ -static int state_show(struct seq_file *seq, void *v) -{ - struct s3c_hsotg *hsotg = seq->private; - void __iomem *regs = hsotg->regs; - int idx; - - seq_printf(seq, "DCFG=0x%08x, DCTL=0x%08x, DSTS=0x%08x\n", - readl(regs + DCFG), - readl(regs + DCTL), - readl(regs + DSTS)); - - seq_printf(seq, "DIEPMSK=0x%08x, DOEPMASK=0x%08x\n", - readl(regs + DIEPMSK), readl(regs + DOEPMSK)); - - seq_printf(seq, "GINTMSK=0x%08x, GINTSTS=0x%08x\n", - readl(regs + GINTMSK), - readl(regs + GINTSTS)); - - seq_printf(seq, "DAINTMSK=0x%08x, DAINT=0x%08x\n", - readl(regs + DAINTMSK), - readl(regs + DAINT)); - - seq_printf(seq, "GNPTXSTS=0x%08x, GRXSTSR=%08x\n", - readl(regs + GNPTXSTS), - readl(regs + GRXSTSR)); - - seq_puts(seq, "\nEndpoint status:\n"); - - for (idx = 0; idx < 15; idx++) { - u32 in, out; - - in = readl(regs + DIEPCTL(idx)); - out = readl(regs + DOEPCTL(idx)); - - seq_printf(seq, "ep%d: DIEPCTL=0x%08x, DOEPCTL=0x%08x", - idx, in, out); - - in = readl(regs + DIEPTSIZ(idx)); - out = readl(regs + DOEPTSIZ(idx)); - - seq_printf(seq, ", DIEPTSIZ=0x%08x, DOEPTSIZ=0x%08x", - in, out); - - seq_puts(seq, "\n"); - } - - return 0; -} - -static int state_open(struct inode *inode, struct file *file) -{ - return single_open(file, state_show, inode->i_private); -} - -static const struct file_operations state_fops = { - .owner = THIS_MODULE, - .open = state_open, - .read = seq_read, - .llseek = seq_lseek, - .release = single_release, -}; - -/** - * fifo_show - debugfs: show the fifo information - * @seq: The seq_file to write data to. - * @v: Unused parameter. - * - * Show the FIFO information for the overall fifo and all the - * periodic transmission FIFOs. - */ -static int fifo_show(struct seq_file *seq, void *v) -{ - struct s3c_hsotg *hsotg = seq->private; - void __iomem *regs = hsotg->regs; - u32 val; - int idx; - - seq_puts(seq, "Non-periodic FIFOs:\n"); - seq_printf(seq, "RXFIFO: Size %d\n", readl(regs + GRXFSIZ)); - - val = readl(regs + GNPTXFSIZ); - seq_printf(seq, "NPTXFIFO: Size %d, Start 0x%08x\n", - val >> GNPTXFSIZ_NPTxFDep_SHIFT, - val & GNPTXFSIZ_NPTxFStAddr_MASK); - - seq_puts(seq, "\nPeriodic TXFIFOs:\n"); - - for (idx = 1; idx <= 15; idx++) { - val = readl(regs + DPTXFSIZn(idx)); - - seq_printf(seq, "\tDPTXFIFO%2d: Size %d, Start 0x%08x\n", idx, - val >> DPTXFSIZn_DPTxFSize_SHIFT, - val & DPTXFSIZn_DPTxFStAddr_MASK); - } - - return 0; -} - -static int fifo_open(struct inode *inode, struct file *file) -{ - return single_open(file, fifo_show, inode->i_private); -} - -static const struct file_operations fifo_fops = { - .owner = THIS_MODULE, - .open = fifo_open, - .read = seq_read, - .llseek = seq_lseek, - .release = single_release, -}; - - -static const char *decode_direction(int is_in) -{ - return is_in ? "in" : "out"; -} - -/** - * ep_show - debugfs: show the state of an endpoint. - * @seq: The seq_file to write data to. - * @v: Unused parameter. - * - * This debugfs entry shows the state of the given endpoint (one is - * registered for each available). - */ -static int ep_show(struct seq_file *seq, void *v) -{ - struct s3c_hsotg_ep *ep = seq->private; - struct s3c_hsotg *hsotg = ep->parent; - struct s3c_hsotg_req *req; - void __iomem *regs = hsotg->regs; - int index = ep->index; - int show_limit = 15; - unsigned long flags; - - seq_printf(seq, "Endpoint index %d, named %s, dir %s:\n", - ep->index, ep->ep.name, decode_direction(ep->dir_in)); - - /* first show the register state */ - - seq_printf(seq, "\tDIEPCTL=0x%08x, DOEPCTL=0x%08x\n", - readl(regs + DIEPCTL(index)), - readl(regs + DOEPCTL(index))); - - seq_printf(seq, "\tDIEPDMA=0x%08x, DOEPDMA=0x%08x\n", - readl(regs + DIEPDMA(index)), - readl(regs + DOEPDMA(index))); - - seq_printf(seq, "\tDIEPINT=0x%08x, DOEPINT=0x%08x\n", - readl(regs + DIEPINT(index)), - readl(regs + DOEPINT(index))); - - seq_printf(seq, "\tDIEPTSIZ=0x%08x, DOEPTSIZ=0x%08x\n", - readl(regs + DIEPTSIZ(index)), - readl(regs + DOEPTSIZ(index))); - - seq_puts(seq, "\n"); - seq_printf(seq, "mps %d\n", ep->ep.maxpacket); - seq_printf(seq, "total_data=%ld\n", ep->total_data); - - seq_printf(seq, "request list (%p,%p):\n", - ep->queue.next, ep->queue.prev); - - spin_lock_irqsave(&hsotg->lock, flags); - - list_for_each_entry(req, &ep->queue, queue) { - if (--show_limit < 0) { - seq_puts(seq, "not showing more requests...\n"); - break; - } - - seq_printf(seq, "%c req %p: %d bytes @%p, ", - req == ep->req ? '*' : ' ', - req, req->req.length, req->req.buf); - seq_printf(seq, "%d done, res %d\n", - req->req.actual, req->req.status); - } - - spin_unlock_irqrestore(&hsotg->lock, flags); - - return 0; -} - -static int ep_open(struct inode *inode, struct file *file) -{ - return single_open(file, ep_show, inode->i_private); -} - -static const struct file_operations ep_fops = { - .owner = THIS_MODULE, - .open = ep_open, - .read = seq_read, - .llseek = seq_lseek, - .release = single_release, -}; - -/** - * s3c_hsotg_create_debug - create debugfs directory and files - * @hsotg: The driver state - * - * Create the debugfs files to allow the user to get information - * about the state of the system. The directory name is created - * with the same name as the device itself, in case we end up - * with multiple blocks in future systems. - */ -static void s3c_hsotg_create_debug(struct s3c_hsotg *hsotg) -{ - struct dentry *root; - unsigned epidx; - - root = debugfs_create_dir(dev_name(hsotg->dev), NULL); - hsotg->debug_root = root; - if (IS_ERR(root)) { - dev_err(hsotg->dev, "cannot create debug root\n"); - return; - } - - /* create general state file */ - - hsotg->debug_file = debugfs_create_file("state", 0444, root, - hsotg, &state_fops); - - if (IS_ERR(hsotg->debug_file)) - dev_err(hsotg->dev, "%s: failed to create state\n", __func__); - - hsotg->debug_fifo = debugfs_create_file("fifo", 0444, root, - hsotg, &fifo_fops); - - if (IS_ERR(hsotg->debug_fifo)) - dev_err(hsotg->dev, "%s: failed to create fifo\n", __func__); - - /* create one file for each endpoint */ - - for (epidx = 0; epidx < hsotg->num_of_eps; epidx++) { - struct s3c_hsotg_ep *ep = &hsotg->eps[epidx]; - - ep->debugfs = debugfs_create_file(ep->name, 0444, - root, ep, &ep_fops); - - if (IS_ERR(ep->debugfs)) - dev_err(hsotg->dev, "failed to create %s debug file\n", - ep->name); - } -} - -/** - * s3c_hsotg_delete_debug - cleanup debugfs entries - * @hsotg: The driver state - * - * Cleanup (remove) the debugfs files for use on module exit. - */ -static void s3c_hsotg_delete_debug(struct s3c_hsotg *hsotg) -{ - unsigned epidx; - - for (epidx = 0; epidx < hsotg->num_of_eps; epidx++) { - struct s3c_hsotg_ep *ep = &hsotg->eps[epidx]; - debugfs_remove(ep->debugfs); - } - - debugfs_remove(hsotg->debug_file); - debugfs_remove(hsotg->debug_fifo); - debugfs_remove(hsotg->debug_root); -} - -/** - * s3c_hsotg_probe - probe function for hsotg driver - * @pdev: The platform information for the driver - */ - -static int s3c_hsotg_probe(struct platform_device *pdev) -{ - struct s3c_hsotg_plat *plat = dev_get_platdata(&pdev->dev); - struct phy *phy; - struct usb_phy *uphy; - struct device *dev = &pdev->dev; - struct s3c_hsotg_ep *eps; - struct s3c_hsotg *hsotg; - struct resource *res; - int epnum; - int ret; - int i; - - hsotg = devm_kzalloc(&pdev->dev, sizeof(struct s3c_hsotg), GFP_KERNEL); - if (!hsotg) { - dev_err(dev, "cannot get memory\n"); - return -ENOMEM; - } - - /* - * Attempt to find a generic PHY, then look for an old style - * USB PHY, finally fall back to pdata - */ - phy = devm_phy_get(&pdev->dev, "usb2-phy"); - if (IS_ERR(phy)) { - uphy = devm_usb_get_phy(dev, USB_PHY_TYPE_USB2); - if (IS_ERR(uphy)) { - /* Fallback for pdata */ - plat = dev_get_platdata(&pdev->dev); - if (!plat) { - dev_err(&pdev->dev, - "no platform data or transceiver defined\n"); - return -EPROBE_DEFER; - } - hsotg->plat = plat; - } else - hsotg->uphy = uphy; - } else - hsotg->phy = phy; - - hsotg->dev = dev; - - hsotg->clk = devm_clk_get(&pdev->dev, "otg"); - if (IS_ERR(hsotg->clk)) { - dev_err(dev, "cannot get otg clock\n"); - return PTR_ERR(hsotg->clk); - } - - platform_set_drvdata(pdev, hsotg); - - res = platform_get_resource(pdev, IORESOURCE_MEM, 0); - - hsotg->regs = devm_ioremap_resource(&pdev->dev, res); - if (IS_ERR(hsotg->regs)) { - ret = PTR_ERR(hsotg->regs); - goto err_clk; - } - - ret = platform_get_irq(pdev, 0); - if (ret < 0) { - dev_err(dev, "cannot find IRQ\n"); - goto err_clk; - } - - spin_lock_init(&hsotg->lock); - - hsotg->irq = ret; - - ret = devm_request_irq(&pdev->dev, hsotg->irq, s3c_hsotg_irq, 0, - dev_name(dev), hsotg); - if (ret < 0) { - dev_err(dev, "cannot claim IRQ\n"); - goto err_clk; - } - - dev_info(dev, "regs %p, irq %d\n", hsotg->regs, hsotg->irq); - - hsotg->gadget.max_speed = USB_SPEED_HIGH; - hsotg->gadget.ops = &s3c_hsotg_gadget_ops; - hsotg->gadget.name = dev_name(dev); - - /* reset the system */ - - clk_prepare_enable(hsotg->clk); - - /* regulators */ - - for (i = 0; i < ARRAY_SIZE(hsotg->supplies); i++) - hsotg->supplies[i].supply = s3c_hsotg_supply_names[i]; - - ret = devm_regulator_bulk_get(dev, ARRAY_SIZE(hsotg->supplies), - hsotg->supplies); - if (ret) { - dev_err(dev, "failed to request supplies: %d\n", ret); - goto err_clk; - } - - ret = regulator_bulk_enable(ARRAY_SIZE(hsotg->supplies), - hsotg->supplies); - - if (ret) { - dev_err(hsotg->dev, "failed to enable supplies: %d\n", ret); - goto err_supplies; - } - - /* Set default UTMI width */ - hsotg->phyif = GUSBCFG_PHYIf16; - - /* - * If using the generic PHY framework, check if the PHY bus - * width is 8-bit and set the phyif appropriately. - */ - if (hsotg->phy && (phy_get_bus_width(phy) == 8)) - hsotg->phyif = GUSBCFG_PHYIf8; - - if (hsotg->phy) - phy_init(hsotg->phy); - - /* usb phy enable */ - s3c_hsotg_phy_enable(hsotg); - - s3c_hsotg_corereset(hsotg); - s3c_hsotg_init(hsotg); - s3c_hsotg_hw_cfg(hsotg); - - /* hsotg->num_of_eps holds number of EPs other than ep0 */ - - if (hsotg->num_of_eps == 0) { - dev_err(dev, "wrong number of EPs (zero)\n"); - ret = -EINVAL; - goto err_supplies; - } - - eps = kcalloc(hsotg->num_of_eps + 1, sizeof(struct s3c_hsotg_ep), - GFP_KERNEL); - if (!eps) { - dev_err(dev, "cannot get memory\n"); - ret = -ENOMEM; - goto err_supplies; - } - - hsotg->eps = eps; - - /* setup endpoint information */ - - INIT_LIST_HEAD(&hsotg->gadget.ep_list); - hsotg->gadget.ep0 = &hsotg->eps[0].ep; - - /* allocate EP0 request */ - - hsotg->ctrl_req = s3c_hsotg_ep_alloc_request(&hsotg->eps[0].ep, - GFP_KERNEL); - if (!hsotg->ctrl_req) { - dev_err(dev, "failed to allocate ctrl req\n"); - ret = -ENOMEM; - goto err_ep_mem; - } - - /* initialise the endpoints now the core has been initialised */ - for (epnum = 0; epnum < hsotg->num_of_eps; epnum++) - s3c_hsotg_initep(hsotg, &hsotg->eps[epnum], epnum); - - /* disable power and clock */ - - ret = regulator_bulk_disable(ARRAY_SIZE(hsotg->supplies), - hsotg->supplies); - if (ret) { - dev_err(hsotg->dev, "failed to disable supplies: %d\n", ret); - goto err_ep_mem; - } - - s3c_hsotg_phy_disable(hsotg); - - ret = usb_add_gadget_udc(&pdev->dev, &hsotg->gadget); - if (ret) - goto err_ep_mem; - - s3c_hsotg_create_debug(hsotg); - - s3c_hsotg_dump(hsotg); - - return 0; - -err_ep_mem: - kfree(eps); -err_supplies: - s3c_hsotg_phy_disable(hsotg); -err_clk: - clk_disable_unprepare(hsotg->clk); - - return ret; -} - -/** - * s3c_hsotg_remove - remove function for hsotg driver - * @pdev: The platform information for the driver - */ -static int s3c_hsotg_remove(struct platform_device *pdev) -{ - struct s3c_hsotg *hsotg = platform_get_drvdata(pdev); - - usb_del_gadget_udc(&hsotg->gadget); - - s3c_hsotg_delete_debug(hsotg); - - if (hsotg->driver) { - /* should have been done already by driver model core */ - usb_gadget_unregister_driver(hsotg->driver); - } - - s3c_hsotg_phy_disable(hsotg); - if (hsotg->phy) - phy_exit(hsotg->phy); - clk_disable_unprepare(hsotg->clk); - - return 0; -} - -static int s3c_hsotg_suspend(struct platform_device *pdev, pm_message_t state) -{ - struct s3c_hsotg *hsotg = platform_get_drvdata(pdev); - unsigned long flags; - int ret = 0; - - if (hsotg->driver) - dev_info(hsotg->dev, "suspending usb gadget %s\n", - hsotg->driver->driver.name); - - spin_lock_irqsave(&hsotg->lock, flags); - s3c_hsotg_disconnect(hsotg); - s3c_hsotg_phy_disable(hsotg); - hsotg->gadget.speed = USB_SPEED_UNKNOWN; - spin_unlock_irqrestore(&hsotg->lock, flags); - - if (hsotg->driver) { - int ep; - for (ep = 0; ep < hsotg->num_of_eps; ep++) - s3c_hsotg_ep_disable(&hsotg->eps[ep].ep); - - ret = regulator_bulk_disable(ARRAY_SIZE(hsotg->supplies), - hsotg->supplies); - } - - return ret; -} - -static int s3c_hsotg_resume(struct platform_device *pdev) -{ - struct s3c_hsotg *hsotg = platform_get_drvdata(pdev); - unsigned long flags; - int ret = 0; - - if (hsotg->driver) { - dev_info(hsotg->dev, "resuming usb gadget %s\n", - hsotg->driver->driver.name); - ret = regulator_bulk_enable(ARRAY_SIZE(hsotg->supplies), - hsotg->supplies); - } - - spin_lock_irqsave(&hsotg->lock, flags); - hsotg->last_rst = jiffies; - s3c_hsotg_phy_enable(hsotg); - s3c_hsotg_core_init(hsotg); - spin_unlock_irqrestore(&hsotg->lock, flags); - - return ret; -} - -#ifdef CONFIG_OF -static const struct of_device_id s3c_hsotg_of_ids[] = { - { .compatible = "samsung,s3c6400-hsotg", }, - { .compatible = "snps,dwc2", }, - { /* sentinel */ } -}; -MODULE_DEVICE_TABLE(of, s3c_hsotg_of_ids); -#endif - -static struct platform_driver s3c_hsotg_driver = { - .driver = { - .name = "s3c-hsotg", - .owner = THIS_MODULE, - .of_match_table = of_match_ptr(s3c_hsotg_of_ids), - }, - .probe = s3c_hsotg_probe, - .remove = s3c_hsotg_remove, - .suspend = s3c_hsotg_suspend, - .resume = s3c_hsotg_resume, -}; - -module_platform_driver(s3c_hsotg_driver); - -MODULE_DESCRIPTION("Samsung S3C USB High-speed/OtG device"); -MODULE_AUTHOR("Ben Dooks <ben@simtec.co.uk>"); -MODULE_LICENSE("GPL"); -MODULE_ALIAS("platform:s3c-hsotg"); |