diff options
Diffstat (limited to 'drivers/usb/gadget/pxa27x_udc.c')
| -rw-r--r-- | drivers/usb/gadget/pxa27x_udc.c | 1490 |
1 files changed, 0 insertions, 1490 deletions
diff --git a/drivers/usb/gadget/pxa27x_udc.c b/drivers/usb/gadget/pxa27x_udc.c deleted file mode 100644 index 442c90ca05..0000000000 --- a/drivers/usb/gadget/pxa27x_udc.c +++ /dev/null @@ -1,1490 +0,0 @@ -/* - * Handles the Intel 27x USB Device Controller (UDC) - * - * Inspired by original driver by Frank Becker, David Brownell, and others. - * Copyright (C) 2008 Robert Jarzmik - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; either version 2 of the License, or - * (at your option) any later version. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * - * Taken from linux-2.6 kernel and adapted to barebox. - */ -#include <common.h> -#include <errno.h> -#include <clock.h> -#include <io.h> -#include <gpio.h> -#include <init.h> - -#include <usb/ch9.h> -#include <usb/gadget.h> - -#include "pxa27x_udc.h" -#include <mach/udc_pxa2xx.h> -#include <mach/pxa-regs.h> - -#define DRIVER_VERSION "2008-04-18" -#define DRIVER_DESC "PXA 27x USB Device Controller driver" - -static const char driver_name[] = "pxa27x_udc"; -static struct pxa_udc *the_controller; - -static void handle_ep(struct pxa_ep *ep); - -static int is_match_usb_pxa(struct udc_usb_ep *udc_usb_ep, struct pxa_ep *ep, - int config, int interface, int altsetting) -{ - if (usb_endpoint_num(&udc_usb_ep->desc) != ep->addr) - return 0; - if (usb_endpoint_dir_in(&udc_usb_ep->desc) != ep->dir_in) - return 0; - if (usb_endpoint_type(&udc_usb_ep->desc) != ep->type) - return 0; - if ((ep->config != config) || (ep->interface != interface) - || (ep->alternate != altsetting)) - return 0; - return 1; -} - -static struct pxa_ep *find_pxa_ep(struct pxa_udc *udc, - struct udc_usb_ep *udc_usb_ep) -{ - int i; - struct pxa_ep *ep; - int cfg = udc->config; - int iface = udc->last_interface; - int alt = udc->last_alternate; - - if (udc_usb_ep == &udc->udc_usb_ep[0]) - return &udc->pxa_ep[0]; - - for (i = 1; i < NR_PXA_ENDPOINTS; i++) { - ep = &udc->pxa_ep[i]; - if (is_match_usb_pxa(udc_usb_ep, ep, cfg, iface, alt)) - return ep; - } - return NULL; -} - -static void update_pxa_ep_matches(struct pxa_udc *udc) -{ - int i; - struct udc_usb_ep *udc_usb_ep; - - for (i = 1; i < NR_USB_ENDPOINTS; i++) { - udc_usb_ep = &udc->udc_usb_ep[i]; - if (udc_usb_ep->pxa_ep) - udc_usb_ep->pxa_ep = find_pxa_ep(udc, udc_usb_ep); - } -} - -static void pio_irq_enable(struct pxa_ep *ep) -{ - struct pxa_udc *udc = ep->dev; - int index = EPIDX(ep); - u32 udcicr0 = udc_readl(udc, UDCICR0); - u32 udcicr1 = udc_readl(udc, UDCICR1); - - if (index < 16) - udc_writel(udc, UDCICR0, udcicr0 | (3 << (index * 2))); - else - udc_writel(udc, UDCICR1, udcicr1 | (3 << ((index - 16) * 2))); -} - -static void pio_irq_disable(struct pxa_ep *ep) -{ - struct pxa_udc *udc = ep->dev; - int index = EPIDX(ep); - u32 udcicr0 = udc_readl(udc, UDCICR0); - u32 udcicr1 = udc_readl(udc, UDCICR1); - - if (index < 16) - udc_writel(udc, UDCICR0, udcicr0 & ~(3 << (index * 2))); - else - udc_writel(udc, UDCICR1, udcicr1 & ~(3 << ((index - 16) * 2))); -} - -static inline void udc_set_mask_UDCCR(struct pxa_udc *udc, int mask) -{ - u32 udccr = udc_readl(udc, UDCCR); - udc_writel(udc, UDCCR, - (udccr & UDCCR_MASK_BITS) | (mask & UDCCR_MASK_BITS)); -} - -static inline void udc_clear_mask_UDCCR(struct pxa_udc *udc, int mask) -{ - u32 udccr = udc_readl(udc, UDCCR); - udc_writel(udc, UDCCR, - (udccr & UDCCR_MASK_BITS) & ~(mask & UDCCR_MASK_BITS)); -} - -static inline void ep_write_UDCCSR(struct pxa_ep *ep, int mask) -{ - if (is_ep0(ep)) - mask |= UDCCSR0_ACM; - udc_ep_writel(ep, UDCCSR, mask); -} - -static int ep_count_bytes_remain(struct pxa_ep *ep) -{ - if (ep->dir_in) - return -EOPNOTSUPP; - return udc_ep_readl(ep, UDCBCR) & 0x3ff; -} - -static int ep_is_empty(struct pxa_ep *ep) -{ - int ret; - - if (!is_ep0(ep) && ep->dir_in) - return -EOPNOTSUPP; - if (is_ep0(ep)) - ret = !(udc_ep_readl(ep, UDCCSR) & UDCCSR0_RNE); - else - ret = !(udc_ep_readl(ep, UDCCSR) & UDCCSR_BNE); - return ret; -} - -static int ep_is_full(struct pxa_ep *ep) -{ - if (is_ep0(ep)) - return udc_ep_readl(ep, UDCCSR) & UDCCSR0_IPR; - if (!ep->dir_in) - return -EOPNOTSUPP; - return !(udc_ep_readl(ep, UDCCSR) & UDCCSR_BNF); -} - -static int epout_has_pkt(struct pxa_ep *ep) -{ - if (!is_ep0(ep) && ep->dir_in) - return -EOPNOTSUPP; - if (is_ep0(ep)) - return udc_ep_readl(ep, UDCCSR) & UDCCSR0_OPC; - return udc_ep_readl(ep, UDCCSR) & UDCCSR_PC; -} - -static void set_ep0state(struct pxa_udc *udc, int state) -{ - struct pxa_ep *ep = &udc->pxa_ep[0]; - char *old_stname = EP0_STNAME(udc); - - udc->ep0state = state; - ep_dbg(ep, "state=%s->%s, udccsr0=0x%03x, udcbcr=%d\n", old_stname, - EP0_STNAME(udc), udc_ep_readl(ep, UDCCSR), - udc_ep_readl(ep, UDCBCR)); -} - -static void ep0_idle(struct pxa_udc *dev) -{ - set_ep0state(dev, WAIT_FOR_SETUP); -} - -static __init void pxa_ep_setup(struct pxa_ep *ep) -{ - u32 new_udccr; - - new_udccr = ((ep->config << UDCCONR_CN_S) & UDCCONR_CN) - | ((ep->interface << UDCCONR_IN_S) & UDCCONR_IN) - | ((ep->alternate << UDCCONR_AISN_S) & UDCCONR_AISN) - | ((EPADDR(ep) << UDCCONR_EN_S) & UDCCONR_EN) - | ((EPXFERTYPE(ep) << UDCCONR_ET_S) & UDCCONR_ET) - | ((ep->dir_in) ? UDCCONR_ED : 0) - | ((ep->fifo_size << UDCCONR_MPS_S) & UDCCONR_MPS) - | UDCCONR_EE; - - udc_ep_writel(ep, UDCCR, new_udccr); -} - -static __init void pxa_eps_setup(struct pxa_udc *dev) -{ - unsigned int i; - - dev_dbg(dev->dev, "%s: dev=%p\n", __func__, dev); - - for (i = 1; i < NR_PXA_ENDPOINTS; i++) - pxa_ep_setup(&dev->pxa_ep[i]); -} - -static struct usb_request *pxa_ep_alloc_request(struct usb_ep *_ep) -{ - struct pxa27x_request *req; - - req = xzalloc(sizeof *req); - - INIT_LIST_HEAD(&req->queue); - req->in_use = 0; - req->udc_usb_ep = container_of(_ep, struct udc_usb_ep, usb_ep); - - return &req->req; -} - -static void pxa_ep_free_request(struct usb_ep *_ep, struct usb_request *_req) -{ - struct pxa27x_request *req; - - req = container_of(_req, struct pxa27x_request, req); - WARN_ON(!list_empty(&req->queue)); - kfree(req); -} - -static void ep_add_request(struct pxa_ep *ep, struct pxa27x_request *req) -{ - if (unlikely(!req)) - return; - ep_vdbg(ep, "req:%p, lg=%d, udccsr=0x%03x\n", req, - req->req.length, udc_ep_readl(ep, UDCCSR)); - - req->in_use = 1; - list_add_tail(&req->queue, &ep->queue); - pio_irq_enable(ep); -} - -static void ep_del_request(struct pxa_ep *ep, struct pxa27x_request *req) -{ - if (unlikely(!req)) - return; - ep_vdbg(ep, "req:%p, lg=%d, udccsr=0x%03x\n", req, - req->req.length, udc_ep_readl(ep, UDCCSR)); - - list_del_init(&req->queue); - req->in_use = 0; - if (!is_ep0(ep) && list_empty(&ep->queue)) - pio_irq_disable(ep); -} - -static void req_done(struct pxa_ep *ep, struct pxa27x_request *req, int status) -{ - ep_del_request(ep, req); - if (likely(req->req.status == -EINPROGRESS)) - req->req.status = status; - else - status = req->req.status; - - if (status && status != -ESHUTDOWN) - ep_dbg(ep, "complete req %p stat %d len %u/%u\n", - &req->req, status, - req->req.actual, req->req.length); - - req->req.complete(&req->udc_usb_ep->usb_ep, &req->req); -} - -static void ep_end_out_req(struct pxa_ep *ep, struct pxa27x_request *req) -{ - req_done(ep, req, 0); -} - -static void ep0_end_out_req(struct pxa_ep *ep, struct pxa27x_request *req) -{ - set_ep0state(ep->dev, OUT_STATUS_STAGE); - ep_end_out_req(ep, req); - ep0_idle(ep->dev); -} - -static void ep_end_in_req(struct pxa_ep *ep, struct pxa27x_request *req) -{ - req_done(ep, req, 0); -} - -static void ep0_end_in_req(struct pxa_ep *ep, struct pxa27x_request *req) -{ - set_ep0state(ep->dev, IN_STATUS_STAGE); - ep_end_in_req(ep, req); -} - -static void nuke(struct pxa_ep *ep, int status) -{ - struct pxa27x_request *req; - - while (!list_empty(&ep->queue)) { - req = list_entry(ep->queue.next, struct pxa27x_request, queue); - req_done(ep, req, status); - } -} - -static int read_packet(struct pxa_ep *ep, struct pxa27x_request *req) -{ - u32 *buf; - int bytes_ep, bufferspace, count, i; - - bytes_ep = ep_count_bytes_remain(ep); - bufferspace = req->req.length - req->req.actual; - - buf = (u32 *)(req->req.buf + req->req.actual); - - if (likely(!ep_is_empty(ep))) - count = min(bytes_ep, bufferspace); - else /* zlp */ - count = 0; - - for (i = count; i > 0; i -= 4) - *buf++ = udc_ep_readl(ep, UDCDR); - req->req.actual += count; - - ep_write_UDCCSR(ep, UDCCSR_PC); - - return count; -} - -static int write_packet(struct pxa_ep *ep, struct pxa27x_request *req, - unsigned int max) -{ - int length, count, remain, i; - u32 *buf; - u8 *buf_8; - - buf = (u32 *)(req->req.buf + req->req.actual); - prefetch(buf); - - length = min(req->req.length - req->req.actual, max); - req->req.actual += length; - - remain = length & 0x3; - count = length & ~(0x3); - for (i = count; i > 0 ; i -= 4) - udc_ep_writel(ep, UDCDR, *buf++); - - buf_8 = (u8 *)buf; - for (i = remain; i > 0; i--) - udc_ep_writeb(ep, UDCDR, *buf_8++); - - ep_vdbg(ep, "length=%d+%d, udccsr=0x%03x\n", count, remain, - udc_ep_readl(ep, UDCCSR)); - - return length; -} - -static int read_fifo(struct pxa_ep *ep, struct pxa27x_request *req) -{ - int count, is_short, completed = 0; - - while (epout_has_pkt(ep)) { - count = read_packet(ep, req); - - is_short = (count < ep->fifo_size); - ep_dbg(ep, "read udccsr:%03x, count:%d bytes%s req %p %d/%d\n", - udc_ep_readl(ep, UDCCSR), count, is_short ? "/S" : "", - &req->req, req->req.actual, req->req.length); - - /* completion */ - if (is_short || req->req.actual == req->req.length) { - completed = 1; - break; - } - /* finished that packet. the next one may be waiting... */ - } - return completed; -} - -static int write_fifo(struct pxa_ep *ep, struct pxa27x_request *req) -{ - unsigned max; - int count, is_short, is_last = 0, completed = 0, totcount = 0; - u32 udccsr; - - max = ep->fifo_size; - do { - is_short = 0; - - udccsr = udc_ep_readl(ep, UDCCSR); - if (udccsr & UDCCSR_PC) { - ep_vdbg(ep, "Clearing Transmit Complete, udccsr=%x\n", - udccsr); - ep_write_UDCCSR(ep, UDCCSR_PC); - } - if (udccsr & UDCCSR_TRN) { - ep_vdbg(ep, "Clearing Underrun on, udccsr=%x\n", - udccsr); - ep_write_UDCCSR(ep, UDCCSR_TRN); - } - - count = write_packet(ep, req, max); - totcount += count; - - /* last packet is usually short (or a zlp) */ - if (unlikely(count < max)) { - is_last = 1; - is_short = 1; - } else { - if (likely(req->req.length > req->req.actual) - || req->req.zero) - is_last = 0; - else - is_last = 1; - /* interrupt/iso maxpacket may not fill the fifo */ - is_short = unlikely(max < ep->fifo_size); - } - - if (is_short) - ep_write_UDCCSR(ep, UDCCSR_SP); - - /* requests complete when all IN data is in the FIFO */ - if (is_last) { - completed = 1; - break; - } - } while (!ep_is_full(ep)); - - ep_dbg(ep, "wrote count:%d bytes%s%s, left:%d req=%p\n", - totcount, is_last ? "/L" : "", is_short ? "/S" : "", - req->req.length - req->req.actual, &req->req); - - return completed; -} - -static int read_ep0_fifo(struct pxa_ep *ep, struct pxa27x_request *req) -{ - int count, is_short, completed = 0; - - while (epout_has_pkt(ep)) { - count = read_packet(ep, req); - ep_write_UDCCSR(ep, UDCCSR0_OPC); - - is_short = (count < ep->fifo_size); - ep_dbg(ep, "read udccsr:%03x, count:%d bytes%s req %p %d/%d\n", - udc_ep_readl(ep, UDCCSR), count, is_short ? "/S" : "", - &req->req, req->req.actual, req->req.length); - - if (is_short || req->req.actual >= req->req.length) { - completed = 1; - break; - } - } - - return completed; -} - -static int write_ep0_fifo(struct pxa_ep *ep, struct pxa27x_request *req) -{ - unsigned count; - int is_last, is_short; - - count = write_packet(ep, req, EP0_FIFO_SIZE); - - is_short = (count < EP0_FIFO_SIZE); - is_last = ((count == 0) || (count < EP0_FIFO_SIZE)); - - /* Sends either a short packet or a 0 length packet */ - if (unlikely(is_short)) - ep_write_UDCCSR(ep, UDCCSR0_IPR); - - ep_dbg(ep, "in %d bytes%s%s, %d left, req=%p, udccsr0=0x%03x\n", - count, is_short ? "/S" : "", is_last ? "/L" : "", - req->req.length - req->req.actual, - &req->req, udc_ep_readl(ep, UDCCSR)); - - return is_last; -} - -static int pxa_ep_queue(struct usb_ep *_ep, struct usb_request *_req) -{ - struct udc_usb_ep *udc_usb_ep; - struct pxa_ep *ep; - struct pxa27x_request *req; - struct pxa_udc *dev; - int rc = 0; - int is_first_req; - unsigned length; - - req = container_of(_req, struct pxa27x_request, req); - udc_usb_ep = container_of(_ep, struct udc_usb_ep, usb_ep); - - if (unlikely(!_req || !_req->complete || !_req->buf)) - return -EINVAL; - - if (unlikely(!_ep)) - return -EINVAL; - - dev = udc_usb_ep->dev; - ep = udc_usb_ep->pxa_ep; - if (unlikely(!ep)) - return -EINVAL; - - dev = ep->dev; - if (unlikely(!dev->driver || dev->gadget.speed == USB_SPEED_UNKNOWN)) { - ep_dbg(ep, "bogus device state\n"); - return -ESHUTDOWN; - } - - /* iso is always one packet per request, that's the only way - * we can report per-packet status. that also helps with dma. - */ - if (unlikely(EPXFERTYPE_is_ISO(ep) - && req->req.length > ep->fifo_size)) - return -EMSGSIZE; - - is_first_req = list_empty(&ep->queue); - ep_dbg(ep, "queue req %p(first=%s), len %d buf %p\n", - _req, is_first_req ? "yes" : "no", - _req->length, _req->buf); - - if (!ep->enabled) { - _req->status = -ESHUTDOWN; - rc = -ESHUTDOWN; - goto out_locked; - } - - if (req->in_use) { - ep_err(ep, "refusing to queue req %p (already queued)\n", req); - goto out_locked; - } - - length = _req->length; - _req->status = -EINPROGRESS; - _req->actual = 0; - - ep_add_request(ep, req); - - if (is_ep0(ep)) { - switch (dev->ep0state) { - case WAIT_ACK_SET_CONF_INTERF: - if (length == 0) { - ep_end_in_req(ep, req); - } else { - ep_err(ep, "got a request of %d bytes while" - "in state WAIT_ACK_SET_CONF_INTERF\n", - length); - ep_del_request(ep, req); - rc = -EL2HLT; - } - ep0_idle(ep->dev); - break; - case IN_DATA_STAGE: - if (!ep_is_full(ep)) - if (write_ep0_fifo(ep, req)) - ep0_end_in_req(ep, req); - break; - case OUT_DATA_STAGE: - if ((length == 0) || !epout_has_pkt(ep)) - if (read_ep0_fifo(ep, req)) - ep0_end_out_req(ep, req); - break; - default: - ep_err(ep, "odd state %s to send me a request\n", - EP0_STNAME(ep->dev)); - ep_del_request(ep, req); - rc = -EL2HLT; - break; - } - } else { - handle_ep(ep); - } - -out: - return rc; -out_locked: - goto out; -} - -static int pxa_ep_dequeue(struct usb_ep *_ep, struct usb_request *_req) -{ - struct pxa_ep *ep; - struct udc_usb_ep *udc_usb_ep; - struct pxa27x_request *req; - int rc = -EINVAL; - - if (!_ep) - return rc; - udc_usb_ep = container_of(_ep, struct udc_usb_ep, usb_ep); - ep = udc_usb_ep->pxa_ep; - if (!ep || is_ep0(ep)) - return rc; - - /* make sure it's actually queued on this endpoint */ - list_for_each_entry(req, &ep->queue, queue) { - if (&req->req == _req) { - rc = 0; - break; - } - } - - if (!rc) - req_done(ep, req, -ECONNRESET); - return rc; -} - -static int pxa_ep_set_halt(struct usb_ep *_ep, int value) -{ - struct pxa_ep *ep; - struct udc_usb_ep *udc_usb_ep; - int rc; - - - if (!_ep) - return -EINVAL; - udc_usb_ep = container_of(_ep, struct udc_usb_ep, usb_ep); - ep = udc_usb_ep->pxa_ep; - if (!ep || is_ep0(ep)) - return -EINVAL; - - if (value == 0) { - /* - * This path (reset toggle+halt) is needed to implement - * SET_INTERFACE on normal hardware. but it can't be - * done from software on the PXA UDC, and the hardware - * forgets to do it as part of SET_INTERFACE automagic. - */ - ep_dbg(ep, "only host can clear halt\n"); - return -EROFS; - } - - rc = -EAGAIN; - if (ep->dir_in && (ep_is_full(ep) || !list_empty(&ep->queue))) - goto out; - - /* FST, FEF bits are the same for control and non control endpoints */ - rc = 0; - ep_write_UDCCSR(ep, UDCCSR_FST | UDCCSR_FEF); - if (is_ep0(ep)) - set_ep0state(ep->dev, STALL); - -out: - return rc; -} - -static int pxa_ep_fifo_status(struct usb_ep *_ep) -{ - struct pxa_ep *ep; - struct udc_usb_ep *udc_usb_ep; - - if (!_ep) - return -ENODEV; - udc_usb_ep = container_of(_ep, struct udc_usb_ep, usb_ep); - ep = udc_usb_ep->pxa_ep; - if (!ep || is_ep0(ep)) - return -ENODEV; - - if (ep->dir_in) - return -EOPNOTSUPP; - if (ep->dev->gadget.speed == USB_SPEED_UNKNOWN || ep_is_empty(ep)) - return 0; - else - return ep_count_bytes_remain(ep) + 1; -} - -static void pxa_ep_fifo_flush(struct usb_ep *_ep) -{ - struct pxa_ep *ep; - struct udc_usb_ep *udc_usb_ep; - - if (!_ep) - return; - udc_usb_ep = container_of(_ep, struct udc_usb_ep, usb_ep); - ep = udc_usb_ep->pxa_ep; - if (!ep || is_ep0(ep)) - return; - - if (unlikely(!list_empty(&ep->queue))) - ep_dbg(ep, "called while queue list not empty\n"); - ep_dbg(ep, "called\n"); - - /* for OUT, just read and discard the FIFO contents. */ - if (!ep->dir_in) { - while (!ep_is_empty(ep)) - udc_ep_readl(ep, UDCDR); - } else { - /* most IN status is the same, but ISO can't stall */ - ep_write_UDCCSR(ep, - UDCCSR_PC | UDCCSR_FEF | UDCCSR_TRN - | (EPXFERTYPE_is_ISO(ep) ? 0 : UDCCSR_SST)); - } -} - -static int pxa_ep_enable(struct usb_ep *_ep, - const struct usb_endpoint_descriptor *desc) -{ - struct pxa_ep *ep; - struct udc_usb_ep *udc_usb_ep; - struct pxa_udc *udc; - - if (!_ep || !desc) - return -EINVAL; - - udc_usb_ep = container_of(_ep, struct udc_usb_ep, usb_ep); - if (udc_usb_ep->pxa_ep) { - ep = udc_usb_ep->pxa_ep; - ep_warn(ep, "usb_ep %s already enabled, doing nothing\n", - _ep->name); - } else { - ep = find_pxa_ep(udc_usb_ep->dev, udc_usb_ep); - } - - if (!ep || is_ep0(ep)) { - dev_err(udc_usb_ep->dev->dev, - "unable to match pxa_ep for ep %s\n", - _ep->name); - return -EINVAL; - } - - if ((desc->bDescriptorType != USB_DT_ENDPOINT) - || (ep->type != usb_endpoint_type(desc))) { - ep_err(ep, "type mismatch\n"); - return -EINVAL; - } - - if (ep->fifo_size < le16_to_cpu(desc->wMaxPacketSize)) { - ep_err(ep, "bad maxpacket\n"); - return -ERANGE; - } - - udc_usb_ep->pxa_ep = ep; - udc = ep->dev; - - if (!udc->driver || udc->gadget.speed == USB_SPEED_UNKNOWN) { - ep_err(ep, "bogus device state\n"); - return -ESHUTDOWN; - } - - ep->enabled = 1; - - /* flush fifo (mostly for OUT buffers) */ - pxa_ep_fifo_flush(_ep); - - ep_dbg(ep, "enabled\n"); - return 0; -} - -static int pxa_ep_disable(struct usb_ep *_ep) -{ - struct pxa_ep *ep; - struct udc_usb_ep *udc_usb_ep; - - if (!_ep) - return -EINVAL; - - udc_usb_ep = container_of(_ep, struct udc_usb_ep, usb_ep); - ep = udc_usb_ep->pxa_ep; - if (!ep || is_ep0(ep) || !list_empty(&ep->queue)) - return -EINVAL; - - ep->enabled = 0; - nuke(ep, -ESHUTDOWN); - - pxa_ep_fifo_flush(_ep); - udc_usb_ep->pxa_ep = NULL; - - ep_dbg(ep, "disabled\n"); - return 0; -} - -static struct usb_ep_ops pxa_ep_ops = { - .enable = pxa_ep_enable, - .disable = pxa_ep_disable, - - .alloc_request = pxa_ep_alloc_request, - .free_request = pxa_ep_free_request, - - .queue = pxa_ep_queue, - .dequeue = pxa_ep_dequeue, - - .set_halt = pxa_ep_set_halt, - .fifo_status = pxa_ep_fifo_status, - .fifo_flush = pxa_ep_fifo_flush, -}; - -static void dplus_pullup(struct pxa_udc *udc, int on) -{ - if (on) { - if (udc->mach->gpio_pullup > 0) - gpio_set_value(udc->mach->gpio_pullup, - !udc->mach->gpio_pullup_inverted); - if (udc->mach->udc_command) - udc->mach->udc_command(PXA2XX_UDC_CMD_CONNECT); - } else { - if (udc->mach->gpio_pullup > 0) - gpio_set_value(udc->mach->gpio_pullup, - udc->mach->gpio_pullup_inverted); - if (udc->mach->udc_command) - udc->mach->udc_command(PXA2XX_UDC_CMD_DISCONNECT); - } - udc->pullup_on = on; -} - -/** - * pxa_udc_get_frame - Returns usb frame number - * @_gadget: usb gadget - */ -static int pxa_udc_get_frame(struct usb_gadget *_gadget) -{ - struct pxa_udc *udc = to_gadget_udc(_gadget); - - return udc_readl(udc, UDCFNR) & 0x7ff; -} - -static int pxa_udc_wakeup(struct usb_gadget *_gadget) -{ - struct pxa_udc *udc = to_gadget_udc(_gadget); - - /* host may not have enabled remote wakeup */ - if ((udc_readl(udc, UDCCR) & UDCCR_DWRE) == 0) - return -EHOSTUNREACH; - udc_set_mask_UDCCR(udc, UDCCR_UDR); - return 0; -} - -static void udc_enable(struct pxa_udc *udc); -static void udc_disable(struct pxa_udc *udc); - -static int should_enable_udc(struct pxa_udc *udc) -{ - int put_on; - - put_on = ((udc->pullup_on) && (udc->driver)); - put_on &= udc->vbus_sensed; - return put_on; -} - -static int should_disable_udc(struct pxa_udc *udc) -{ - int put_off; - - put_off = ((!udc->pullup_on) || (!udc->driver)); - put_off |= !udc->vbus_sensed; - return put_off; -} - -static int pxa_udc_pullup(struct usb_gadget *_gadget, int is_active) -{ - struct pxa_udc *udc = to_gadget_udc(_gadget); - - if ((udc->mach->gpio_pullup < 0) && !udc->mach->udc_command) - return -EOPNOTSUPP; - - dplus_pullup(udc, is_active); - - if (should_enable_udc(udc)) - udc_enable(udc); - if (should_disable_udc(udc)) - udc_disable(udc); - return 0; -} - -static int pxa_udc_vbus_session(struct usb_gadget *_gadget, int is_active) -{ - struct pxa_udc *udc = to_gadget_udc(_gadget); - - udc->vbus_sensed = is_active; - if (should_enable_udc(udc)) - udc_enable(udc); - if (should_disable_udc(udc)) - udc_disable(udc); - - return 0; -} - -static int pxa_udc_start(struct usb_gadget *gadget, struct usb_gadget_driver *driver); -static int pxa_udc_stop(struct usb_gadget *gadget, struct usb_gadget_driver *driver); -static void pxa_udc_gadget_poll(struct usb_gadget *gadget); - -static const struct usb_gadget_ops pxa_udc_ops = { - .get_frame = pxa_udc_get_frame, - .wakeup = pxa_udc_wakeup, - .pullup = pxa_udc_pullup, - .vbus_session = pxa_udc_vbus_session, - .udc_start = pxa_udc_start, - .udc_stop = pxa_udc_stop, - .udc_poll = pxa_udc_gadget_poll, -}; - -static void clk_enable(void) -{ - CKEN |= CKEN_USB; -} - -static void clk_disable(void) -{ - CKEN &= ~CKEN_USB; -} - -static void udc_disable(struct pxa_udc *udc) -{ - if (!udc->enabled) - return; - - udc_writel(udc, UDCICR0, 0); - udc_writel(udc, UDCICR1, 0); - - udc_clear_mask_UDCCR(udc, UDCCR_UDE); - clk_disable(); - - ep0_idle(udc); - udc->gadget.speed = USB_SPEED_UNKNOWN; - - udc->enabled = 0; -} - -static __init void udc_init_data(struct pxa_udc *dev) -{ - int i; - struct pxa_ep *ep; - - /* device/ep0 records init */ - INIT_LIST_HEAD(&dev->gadget.ep_list); - INIT_LIST_HEAD(&dev->gadget.ep0->ep_list); - dev->udc_usb_ep[0].pxa_ep = &dev->pxa_ep[0]; - ep0_idle(dev); - - /* PXA endpoints init */ - for (i = 0; i < NR_PXA_ENDPOINTS; i++) { - ep = &dev->pxa_ep[i]; - - ep->enabled = is_ep0(ep); - INIT_LIST_HEAD(&ep->queue); - } - - /* USB endpoints init */ - for (i = 1; i < NR_USB_ENDPOINTS; i++) { - list_add_tail(&dev->udc_usb_ep[i].usb_ep.ep_list, - &dev->gadget.ep_list); - usb_ep_set_maxpacket_limit(&dev->udc_usb_ep[i].usb_ep, - dev->udc_usb_ep[i].usb_ep.maxpacket); - } -} - -static void udc_enable(struct pxa_udc *udc) -{ - if (udc->enabled) - return; - - udc_writel(udc, UDCICR0, 0); - udc_writel(udc, UDCICR1, 0); - udc_clear_mask_UDCCR(udc, UDCCR_UDE); - - clk_enable(); - - ep0_idle(udc); - udc->gadget.speed = USB_SPEED_FULL; - memset(&udc->stats, 0, sizeof(udc->stats)); - - udc_set_mask_UDCCR(udc, UDCCR_UDE); - ep_write_UDCCSR(&udc->pxa_ep[0], UDCCSR0_ACM); - udelay(2); - if (udc_readl(udc, UDCCR) & UDCCR_EMCE) - dev_err(udc->dev, "Configuration errors, udc disabled\n"); - - /* - * Caller must be able to sleep in order to cope with startup transients - */ - mdelay(100); - - /* enable suspend/resume and reset irqs */ - udc_writel(udc, UDCICR1, - UDCICR1_IECC | UDCICR1_IERU - | UDCICR1_IESU | UDCICR1_IERS); - - pio_irq_enable(&udc->pxa_ep[0]); - udc->enabled = 1; -} - -static int pxa_udc_start(struct usb_gadget *gadget, struct usb_gadget_driver *driver) -{ - struct pxa_udc *udc = the_controller; - - /* first hook up the driver ... */ - udc->driver = driver; - - dev_dbg(udc->dev, "registered gadget function '%s'\n", - driver->function); - - if (should_enable_udc(udc)) - udc_enable(udc); - return 0; -} - -static void stop_activity(struct pxa_udc *udc, struct usb_gadget_driver *driver) -{ - int i; - - /* don't disconnect drivers more than once */ - if (udc->gadget.speed == USB_SPEED_UNKNOWN) - driver = NULL; - udc->gadget.speed = USB_SPEED_UNKNOWN; - - for (i = 0; i < NR_USB_ENDPOINTS; i++) - pxa_ep_disable(&udc->udc_usb_ep[i].usb_ep); - - if (driver) - driver->disconnect(&udc->gadget); -} - -static int pxa_udc_stop(struct usb_gadget *gadget, struct usb_gadget_driver *driver) -{ - struct pxa_udc *udc = the_controller; - - if (!udc) - return -ENODEV; - if (!driver || driver != udc->driver || !driver->unbind) - return -EINVAL; - - stop_activity(udc, driver); - udc_disable(udc); - - driver->disconnect(&udc->gadget); - driver->unbind(&udc->gadget); - udc->driver = NULL; - - /* - dev_info(udc->dev, "unregistered gadget driver '%s'\n", - driver->driver.name); - */ - return 0; -} - -static void handle_ep0_ctrl_req(struct pxa_udc *udc, - struct pxa27x_request *req) -{ - struct pxa_ep *ep = &udc->pxa_ep[0]; - union { - struct usb_ctrlrequest r; - u32 word[2]; - } u; - int i; - int have_extrabytes = 0; - - nuke(ep, -EPROTO); - - /* - * In the PXA320 manual, in the section about Back-to-Back setup - * packets, it describes this situation. The solution is to set OPC to - * get rid of the status packet, and then continue with the setup - * packet. Generalize to pxa27x CPUs. - */ - if (epout_has_pkt(ep) && (ep_count_bytes_remain(ep) == 0)) - ep_write_UDCCSR(ep, UDCCSR0_OPC); - - /* read SETUP packet */ - for (i = 0; i < 2; i++) { - if (unlikely(ep_is_empty(ep))) - goto stall; - u.word[i] = udc_ep_readl(ep, UDCDR); - } - - have_extrabytes = !ep_is_empty(ep); - while (!ep_is_empty(ep)) { - i = udc_ep_readl(ep, UDCDR); - ep_err(ep, "wrong to have extra bytes for setup : 0x%08x\n", i); - } - - ep_dbg(ep, "SETUP %02x.%02x v%04x i%04x l%04x\n", - u.r.bRequestType, u.r.bRequest, - le16_to_cpu(u.r.wValue), le16_to_cpu(u.r.wIndex), - le16_to_cpu(u.r.wLength)); - if (unlikely(have_extrabytes)) - goto stall; - - if (u.r.bRequestType & USB_DIR_IN) - set_ep0state(udc, IN_DATA_STAGE); - else - set_ep0state(udc, OUT_DATA_STAGE); - - /* Tell UDC to enter Data Stage */ - ep_write_UDCCSR(ep, UDCCSR0_SA | UDCCSR0_OPC); - - i = udc->driver->setup(&udc->gadget, &u.r); - if (i < 0) - goto stall; -out: - return; -stall: - ep_dbg(ep, "protocol STALL, udccsr0=%03x err %d\n", - udc_ep_readl(ep, UDCCSR), i); - ep_write_UDCCSR(ep, UDCCSR0_FST | UDCCSR0_FTF); - set_ep0state(udc, STALL); - goto out; -} - -static void handle_ep0(struct pxa_udc *udc, int fifo_irq, int opc_irq) -{ - u32 udccsr0; - struct pxa_ep *ep = &udc->pxa_ep[0]; - struct pxa27x_request *req = NULL; - int completed = 0; - - if (!list_empty(&ep->queue)) - req = list_entry(ep->queue.next, struct pxa27x_request, queue); - - udccsr0 = udc_ep_readl(ep, UDCCSR); - ep_dbg(ep, "state=%s, req=%p, udccsr0=0x%03x, udcbcr=%d, irq_msk=%x\n", - EP0_STNAME(udc), req, udccsr0, udc_ep_readl(ep, UDCBCR), - (fifo_irq << 1 | opc_irq)); - - if (udccsr0 & UDCCSR0_SST) { - ep_dbg(ep, "clearing stall status\n"); - nuke(ep, -EPIPE); - ep_write_UDCCSR(ep, UDCCSR0_SST); - ep0_idle(udc); - } - - if (udccsr0 & UDCCSR0_SA) { - nuke(ep, 0); - set_ep0state(udc, SETUP_STAGE); - } - - switch (udc->ep0state) { - case WAIT_FOR_SETUP: - /* - * Hardware bug : beware, we cannot clear OPC, since we would - * miss a potential OPC irq for a setup packet. - * So, we only do ... nothing, and hope for a next irq with - * UDCCSR0_SA set. - */ - break; - case SETUP_STAGE: - udccsr0 &= UDCCSR0_CTRL_REQ_MASK; - if (likely(udccsr0 == UDCCSR0_CTRL_REQ_MASK)) - handle_ep0_ctrl_req(udc, req); - break; - case IN_DATA_STAGE: /* GET_DESCRIPTOR */ - if (epout_has_pkt(ep)) - ep_write_UDCCSR(ep, UDCCSR0_OPC); - if (req && !ep_is_full(ep)) - completed = write_ep0_fifo(ep, req); - if (completed) - ep0_end_in_req(ep, req); - break; - case OUT_DATA_STAGE: /* SET_DESCRIPTOR */ - if (epout_has_pkt(ep) && req) - completed = read_ep0_fifo(ep, req); - if (completed) - ep0_end_out_req(ep, req); - break; - case STALL: - ep_write_UDCCSR(ep, UDCCSR0_FST); - break; - case IN_STATUS_STAGE: - /* - * Hardware bug : beware, we cannot clear OPC, since we would - * miss a potential PC irq for a setup packet. - * So, we only put the ep0 into WAIT_FOR_SETUP state. - */ - if (opc_irq) - ep0_idle(udc); - break; - case OUT_STATUS_STAGE: - case WAIT_ACK_SET_CONF_INTERF: - ep_warn(ep, "should never get in %s state here!!!\n", - EP0_STNAME(ep->dev)); - ep0_idle(udc); - break; - } -} - -static void handle_ep(struct pxa_ep *ep) -{ - struct pxa27x_request *req; - int completed; - u32 udccsr; - int is_in = ep->dir_in; - int loop = 0; - - do { - completed = 0; - udccsr = udc_ep_readl(ep, UDCCSR); - - if (likely(!list_empty(&ep->queue))) - req = list_entry(ep->queue.next, - struct pxa27x_request, queue); - else - req = NULL; - - ep_dbg(ep, "req:%p, udccsr 0x%03x loop=%d\n", - req, udccsr, loop++); - - if (unlikely(udccsr & (UDCCSR_SST | UDCCSR_TRN))) - udc_ep_writel(ep, UDCCSR, - udccsr & (UDCCSR_SST | UDCCSR_TRN)); - if (!req) - break; - - if (unlikely(is_in)) { - if (likely(!ep_is_full(ep))) - completed = write_fifo(ep, req); - } else { - if (likely(epout_has_pkt(ep))) - completed = read_fifo(ep, req); - } - - if (completed) { - if (is_in) - ep_end_in_req(ep, req); - else - ep_end_out_req(ep, req); - } - } while (completed); - - return; -} - -static void pxa27x_change_configuration(struct pxa_udc *udc, int config) -{ - struct usb_ctrlrequest req ; - - dev_dbg(udc->dev, "config=%d\n", config); - - udc->config = config; - udc->last_interface = 0; - udc->last_alternate = 0; - - req.bRequestType = 0; - req.bRequest = USB_REQ_SET_CONFIGURATION; - req.wValue = config; - req.wIndex = 0; - req.wLength = 0; - - set_ep0state(udc, WAIT_ACK_SET_CONF_INTERF); - udc->driver->setup(&udc->gadget, &req); -} - -static void __maybe_unused pxa27x_change_interface(struct pxa_udc *udc, int iface, int alt) -{ - struct usb_ctrlrequest req; - - dev_dbg(udc->dev, "interface=%d, alternate setting=%d\n", iface, alt); - - udc->last_interface = iface; - udc->last_alternate = alt; - - req.bRequestType = USB_RECIP_INTERFACE; - req.bRequest = USB_REQ_SET_INTERFACE; - req.wValue = alt; - req.wIndex = iface; - req.wLength = 0; - - set_ep0state(udc, WAIT_ACK_SET_CONF_INTERF); - ep_write_UDCCSR(&udc->pxa_ep[0], UDCCSR0_AREN); - udc->driver->setup(&udc->gadget, &req); -} - -static void irq_handle_data(struct pxa_udc *udc) -{ - int i; - struct pxa_ep *ep; - u32 udcisr0 = udc_readl(udc, UDCISR0) & UDCCISR0_EP_MASK; - u32 udcisr1 = udc_readl(udc, UDCISR1) & UDCCISR1_EP_MASK; - - if (udcisr0 & UDCISR_INT_MASK) { - udc_writel(udc, UDCISR0, UDCISR_INT(0, UDCISR_INT_MASK)); - handle_ep0(udc, !!(udcisr0 & UDCICR_FIFOERR), - !!(udcisr0 & UDCICR_PKTCOMPL)); - } - - udcisr0 >>= 2; - for (i = 1; udcisr0 != 0 && i < 16; udcisr0 >>= 2, i++) { - if (!(udcisr0 & UDCISR_INT_MASK)) - continue; - - udc_writel(udc, UDCISR0, UDCISR_INT(i, UDCISR_INT_MASK)); - - WARN_ON(i >= ARRAY_SIZE(udc->pxa_ep)); - if (i < ARRAY_SIZE(udc->pxa_ep)) { - ep = &udc->pxa_ep[i]; - if (ep->enabled) - handle_ep(ep); - } - } - - for (i = 16; udcisr1 != 0 && i < 24; udcisr1 >>= 2, i++) { - udc_writel(udc, UDCISR1, UDCISR_INT(i - 16, UDCISR_INT_MASK)); - if (!(udcisr1 & UDCISR_INT_MASK)) - continue; - - WARN_ON(i >= ARRAY_SIZE(udc->pxa_ep)); - if (i < ARRAY_SIZE(udc->pxa_ep)) { - ep = &udc->pxa_ep[i]; - if (ep->enabled) - handle_ep(ep); - } - } - -} - -static void irq_udc_suspend(struct pxa_udc *udc) -{ - udc_writel(udc, UDCISR1, UDCISR1_IRSU); - - if (udc->gadget.speed != USB_SPEED_UNKNOWN - && udc->driver && udc->driver->suspend) - udc->driver->suspend(&udc->gadget); - ep0_idle(udc); -} - -static void irq_udc_resume(struct pxa_udc *udc) -{ - udc_writel(udc, UDCISR1, UDCISR1_IRRU); - - if (udc->gadget.speed != USB_SPEED_UNKNOWN - && udc->driver && udc->driver->resume) - udc->driver->resume(&udc->gadget); -} - -static void irq_udc_reconfig(struct pxa_udc *udc) -{ - unsigned config, interface, alternate, config_change; - u32 udccr = udc_readl(udc, UDCCR); - - udc_writel(udc, UDCISR1, UDCISR1_IRCC); - - config = (udccr & UDCCR_ACN) >> UDCCR_ACN_S; - config_change = (config != udc->config); - if (config_change) - update_pxa_ep_matches(udc); - udc_set_mask_UDCCR(udc, UDCCR_SMAC); - ep_write_UDCCSR(&udc->pxa_ep[0], UDCCSR0_AREN); - - pxa27x_change_configuration(udc, config); - interface = (udccr & UDCCR_AIN) >> UDCCR_AIN_S; - alternate = (udccr & UDCCR_AAISN) >> UDCCR_AAISN_S; - - /* - * barebox specific: do not call change interface, as change_config has - * already setup the gadget. - * pxa27x_change_interface(udc, interface, alternate); - */ -} - -static void irq_udc_reset(struct pxa_udc *udc) -{ - u32 udccr = udc_readl(udc, UDCCR); - struct pxa_ep *ep = &udc->pxa_ep[0]; - - dev_info(udc->dev, "USB reset\n"); - udc_writel(udc, UDCISR1, UDCISR1_IRRS); - - if ((udccr & UDCCR_UDA) == 0) { - dev_dbg(udc->dev, "USB reset start\n"); - stop_activity(udc, udc->driver); - } - udc->gadget.speed = USB_SPEED_FULL; - - nuke(ep, -EPROTO); - ep_write_UDCCSR(ep, UDCCSR0_FTF | UDCCSR0_OPC); - ep0_idle(udc); -} - -static void pxa_udc_gadget_poll(struct usb_gadget *gadget) -{ - struct pxa_udc *udc = to_gadget_udc(gadget); - u32 udcisr0 = udc_readl(udc, UDCISR0); - u32 udcisr1 = udc_readl(udc, UDCISR1); - u32 udccr = udc_readl(udc, UDCCR); - u32 udcisr1_spec; - - udc->vbus_sensed = udc->mach->udc_is_connected(); - if (should_enable_udc(udc)) - udc_enable(udc); - if (should_disable_udc(udc)) { - stop_activity(udc, udc->driver); - udc_disable(udc); - } - - if (!udc->enabled) - return; - - dev_dbg(udc->dev, "Interrupt, UDCISR0:0x%08x, UDCISR1:0x%08x, " - "UDCCR:0x%08x\n", udcisr0, udcisr1, udccr); - - udcisr1_spec = udcisr1 & 0xf8000000; - if (unlikely(udcisr1_spec & UDCISR1_IRSU)) - irq_udc_suspend(udc); - if (unlikely(udcisr1_spec & UDCISR1_IRRU)) - irq_udc_resume(udc); - if (unlikely(udcisr1_spec & UDCISR1_IRCC)) - irq_udc_reconfig(udc); - if (unlikely(udcisr1_spec & UDCISR1_IRRS)) - irq_udc_reset(udc); - - if ((udcisr0 & UDCCISR0_EP_MASK) | (udcisr1 & UDCCISR1_EP_MASK)) - irq_handle_data(udc); -} - -static struct pxa_udc memory = { - .gadget = { - .ops = &pxa_udc_ops, - .ep0 = &memory.udc_usb_ep[0].usb_ep, - .name = driver_name, - }, - - .udc_usb_ep = { - USB_EP_CTRL, - USB_EP_OUT_BULK(1), - USB_EP_IN_BULK(2), - USB_EP_IN_ISO(3), - USB_EP_OUT_ISO(4), - USB_EP_IN_INT(5), - }, - - .pxa_ep = { - PXA_EP_CTRL, - /* Endpoints for gadget zero */ - PXA_EP_OUT_BULK(1, 1, 3, 0, 0), - PXA_EP_IN_BULK(2, 2, 3, 0, 0), - /* Endpoints for ether gadget, file storage gadget */ - PXA_EP_OUT_BULK(3, 1, 1, 0, 0), - PXA_EP_IN_BULK(4, 2, 1, 0, 0), - PXA_EP_IN_ISO(5, 3, 1, 0, 0), - PXA_EP_OUT_ISO(6, 4, 1, 0, 0), - PXA_EP_IN_INT(7, 5, 1, 0, 0), - /* Endpoints for RNDIS, serial */ - PXA_EP_OUT_BULK(8, 1, 2, 0, 0), - PXA_EP_IN_BULK(9, 2, 2, 0, 0), - PXA_EP_IN_INT(10, 5, 2, 0, 0), - /* - * All the following endpoints are only for completion. They - * won't never work, as multiple interfaces are really broken on - * the pxa. - */ - PXA_EP_OUT_BULK(11, 1, 2, 1, 0), - PXA_EP_IN_BULK(12, 2, 2, 1, 0), - /* Endpoint for CDC Ether */ - PXA_EP_OUT_BULK(13, 1, 1, 1, 1), - PXA_EP_IN_BULK(14, 2, 1, 1, 1), - } -}; - -static int __init pxa_udc_probe(struct device_d *dev) -{ - struct resource *iores; - struct pxa_udc *udc = &memory; - int gpio, ret; - - iores = dev_request_mem_resource(dev, 0); - if (IS_ERR(iores)) - return PTR_ERR(iores); - udc->regs = IOMEM(iores->start); - - udc->dev = dev; - udc->mach = dev->platform_data; - - gpio = udc->mach->gpio_pullup; - if (gpio >= 0) { - gpio_direction_output(gpio, - udc->mach->gpio_pullup_inverted); - } - - udc->vbus_sensed = 0; - - the_controller = udc; - udc_init_data(udc); - pxa_eps_setup(udc); - - ret = usb_add_gadget_udc_release(dev, &udc->gadget, NULL); - if (ret) - return ret; - - return 0; -} - -#define pxa27x_clear_otgph() do {} while (0) - -static struct driver_d udc_driver = { - .name = "pxa27x-udc", - .probe = pxa_udc_probe, -}; -device_platform_driver(udc_driver); |