diff options
Diffstat (limited to 'drivers/usb/gadget/pxa27x_udc.c')
| -rw-r--r-- | drivers/usb/gadget/pxa27x_udc.c | 2626 |
1 files changed, 0 insertions, 2626 deletions
diff --git a/drivers/usb/gadget/pxa27x_udc.c b/drivers/usb/gadget/pxa27x_udc.c deleted file mode 100644 index cdf4d678be96..000000000000 --- a/drivers/usb/gadget/pxa27x_udc.c +++ /dev/null @@ -1,2626 +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. - */ -#include <linux/module.h> -#include <linux/kernel.h> -#include <linux/types.h> -#include <linux/errno.h> -#include <linux/err.h> -#include <linux/platform_device.h> -#include <linux/delay.h> -#include <linux/list.h> -#include <linux/interrupt.h> -#include <linux/proc_fs.h> -#include <linux/clk.h> -#include <linux/irq.h> -#include <linux/gpio.h> -#include <linux/slab.h> -#include <linux/prefetch.h> -#include <linux/byteorder/generic.h> -#include <linux/platform_data/pxa2xx_udc.h> - -#include <linux/usb.h> -#include <linux/usb/ch9.h> -#include <linux/usb/gadget.h> - -#include "pxa27x_udc.h" - -/* - * This driver handles the USB Device Controller (UDC) in Intel's PXA 27x - * series processors. - * - * Such controller drivers work with a gadget driver. The gadget driver - * returns descriptors, implements configuration and data protocols used - * by the host to interact with this device, and allocates endpoints to - * the different protocol interfaces. The controller driver virtualizes - * usb hardware so that the gadget drivers will be more portable. - * - * This UDC hardware wants to implement a bit too much USB protocol. The - * biggest issues are: that the endpoints have to be set up before the - * controller can be enabled (minor, and not uncommon); and each endpoint - * can only have one configuration, interface and alternative interface - * number (major, and very unusual). Once set up, these cannot be changed - * without a controller reset. - * - * The workaround is to setup all combinations necessary for the gadgets which - * will work with this driver. This is done in pxa_udc structure, statically. - * See pxa_udc, udc_usb_ep versus pxa_ep, and matching function find_pxa_ep. - * (You could modify this if needed. Some drivers have a "fifo_mode" module - * parameter to facilitate such changes.) - * - * The combinations have been tested with these gadgets : - * - zero gadget - * - file storage gadget - * - ether gadget - * - * The driver doesn't use DMA, only IO access and IRQ callbacks. No use is - * made of UDC's double buffering either. USB "On-The-Go" is not implemented. - * - * All the requests are handled the same way : - * - the drivers tries to handle the request directly to the IO - * - if the IO fifo is not big enough, the remaining is send/received in - * interrupt handling. - */ - -#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); - -/* - * Debug filesystem - */ -#ifdef CONFIG_USB_GADGET_DEBUG_FS - -#include <linux/debugfs.h> -#include <linux/uaccess.h> -#include <linux/seq_file.h> - -static int state_dbg_show(struct seq_file *s, void *p) -{ - struct pxa_udc *udc = s->private; - int pos = 0, ret; - u32 tmp; - - ret = -ENODEV; - if (!udc->driver) - goto out; - - /* basic device status */ - pos += seq_printf(s, DRIVER_DESC "\n" - "%s version: %s\nGadget driver: %s\n", - driver_name, DRIVER_VERSION, - udc->driver ? udc->driver->driver.name : "(none)"); - - tmp = udc_readl(udc, UDCCR); - pos += seq_printf(s, - "udccr=0x%0x(%s%s%s%s%s%s%s%s%s%s), " - "con=%d,inter=%d,altinter=%d\n", tmp, - (tmp & UDCCR_OEN) ? " oen":"", - (tmp & UDCCR_AALTHNP) ? " aalthnp":"", - (tmp & UDCCR_AHNP) ? " rem" : "", - (tmp & UDCCR_BHNP) ? " rstir" : "", - (tmp & UDCCR_DWRE) ? " dwre" : "", - (tmp & UDCCR_SMAC) ? " smac" : "", - (tmp & UDCCR_EMCE) ? " emce" : "", - (tmp & UDCCR_UDR) ? " udr" : "", - (tmp & UDCCR_UDA) ? " uda" : "", - (tmp & UDCCR_UDE) ? " ude" : "", - (tmp & UDCCR_ACN) >> UDCCR_ACN_S, - (tmp & UDCCR_AIN) >> UDCCR_AIN_S, - (tmp & UDCCR_AAISN) >> UDCCR_AAISN_S); - /* registers for device and ep0 */ - pos += seq_printf(s, "udcicr0=0x%08x udcicr1=0x%08x\n", - udc_readl(udc, UDCICR0), udc_readl(udc, UDCICR1)); - pos += seq_printf(s, "udcisr0=0x%08x udcisr1=0x%08x\n", - udc_readl(udc, UDCISR0), udc_readl(udc, UDCISR1)); - pos += seq_printf(s, "udcfnr=%d\n", udc_readl(udc, UDCFNR)); - pos += seq_printf(s, "irqs: reset=%lu, suspend=%lu, resume=%lu, " - "reconfig=%lu\n", - udc->stats.irqs_reset, udc->stats.irqs_suspend, - udc->stats.irqs_resume, udc->stats.irqs_reconfig); - - ret = 0; -out: - return ret; -} - -static int queues_dbg_show(struct seq_file *s, void *p) -{ - struct pxa_udc *udc = s->private; - struct pxa_ep *ep; - struct pxa27x_request *req; - int pos = 0, i, maxpkt, ret; - - ret = -ENODEV; - if (!udc->driver) - goto out; - - /* dump endpoint queues */ - for (i = 0; i < NR_PXA_ENDPOINTS; i++) { - ep = &udc->pxa_ep[i]; - maxpkt = ep->fifo_size; - pos += seq_printf(s, "%-12s max_pkt=%d %s\n", - EPNAME(ep), maxpkt, "pio"); - - if (list_empty(&ep->queue)) { - pos += seq_printf(s, "\t(nothing queued)\n"); - continue; - } - - list_for_each_entry(req, &ep->queue, queue) { - pos += seq_printf(s, "\treq %p len %d/%d buf %p\n", - &req->req, req->req.actual, - req->req.length, req->req.buf); - } - } - - ret = 0; -out: - return ret; -} - -static int eps_dbg_show(struct seq_file *s, void *p) -{ - struct pxa_udc *udc = s->private; - struct pxa_ep *ep; - int pos = 0, i, ret; - u32 tmp; - - ret = -ENODEV; - if (!udc->driver) - goto out; - - ep = &udc->pxa_ep[0]; - tmp = udc_ep_readl(ep, UDCCSR); - pos += seq_printf(s, "udccsr0=0x%03x(%s%s%s%s%s%s%s)\n", tmp, - (tmp & UDCCSR0_SA) ? " sa" : "", - (tmp & UDCCSR0_RNE) ? " rne" : "", - (tmp & UDCCSR0_FST) ? " fst" : "", - (tmp & UDCCSR0_SST) ? " sst" : "", - (tmp & UDCCSR0_DME) ? " dme" : "", - (tmp & UDCCSR0_IPR) ? " ipr" : "", - (tmp & UDCCSR0_OPC) ? " opc" : ""); - for (i = 0; i < NR_PXA_ENDPOINTS; i++) { - ep = &udc->pxa_ep[i]; - tmp = i? udc_ep_readl(ep, UDCCR) : udc_readl(udc, UDCCR); - pos += seq_printf(s, "%-12s: " - "IN %lu(%lu reqs), OUT %lu(%lu reqs), " - "irqs=%lu, udccr=0x%08x, udccsr=0x%03x, " - "udcbcr=%d\n", - EPNAME(ep), - ep->stats.in_bytes, ep->stats.in_ops, - ep->stats.out_bytes, ep->stats.out_ops, - ep->stats.irqs, - tmp, udc_ep_readl(ep, UDCCSR), - udc_ep_readl(ep, UDCBCR)); - } - - ret = 0; -out: - return ret; -} - -static int eps_dbg_open(struct inode *inode, struct file *file) -{ - return single_open(file, eps_dbg_show, inode->i_private); -} - -static int queues_dbg_open(struct inode *inode, struct file *file) -{ - return single_open(file, queues_dbg_show, inode->i_private); -} - -static int state_dbg_open(struct inode *inode, struct file *file) -{ - return single_open(file, state_dbg_show, inode->i_private); -} - -static const struct file_operations state_dbg_fops = { - .owner = THIS_MODULE, - .open = state_dbg_open, - .llseek = seq_lseek, - .read = seq_read, - .release = single_release, -}; - -static const struct file_operations queues_dbg_fops = { - .owner = THIS_MODULE, - .open = queues_dbg_open, - .llseek = seq_lseek, - .read = seq_read, - .release = single_release, -}; - -static const struct file_operations eps_dbg_fops = { - .owner = THIS_MODULE, - .open = eps_dbg_open, - .llseek = seq_lseek, - .read = seq_read, - .release = single_release, -}; - -static void pxa_init_debugfs(struct pxa_udc *udc) -{ - struct dentry *root, *state, *queues, *eps; - - root = debugfs_create_dir(udc->gadget.name, NULL); - if (IS_ERR(root) || !root) - goto err_root; - - state = debugfs_create_file("udcstate", 0400, root, udc, - &state_dbg_fops); - if (!state) - goto err_state; - queues = debugfs_create_file("queues", 0400, root, udc, - &queues_dbg_fops); - if (!queues) - goto err_queues; - eps = debugfs_create_file("epstate", 0400, root, udc, - &eps_dbg_fops); - if (!eps) - goto err_eps; - - udc->debugfs_root = root; - udc->debugfs_state = state; - udc->debugfs_queues = queues; - udc->debugfs_eps = eps; - return; -err_eps: - debugfs_remove(eps); -err_queues: - debugfs_remove(queues); -err_state: - debugfs_remove(root); -err_root: - dev_err(udc->dev, "debugfs is not available\n"); -} - -static void pxa_cleanup_debugfs(struct pxa_udc *udc) -{ - debugfs_remove(udc->debugfs_eps); - debugfs_remove(udc->debugfs_queues); - debugfs_remove(udc->debugfs_state); - debugfs_remove(udc->debugfs_root); - udc->debugfs_eps = NULL; - udc->debugfs_queues = NULL; - udc->debugfs_state = NULL; - udc->debugfs_root = NULL; -} - -#else -static inline void pxa_init_debugfs(struct pxa_udc *udc) -{ -} - -static inline void pxa_cleanup_debugfs(struct pxa_udc *udc) -{ -} -#endif - -/** - * is_match_usb_pxa - check if usb_ep and pxa_ep match - * @udc_usb_ep: usb endpoint - * @ep: pxa endpoint - * @config: configuration required in pxa_ep - * @interface: interface required in pxa_ep - * @altsetting: altsetting required in pxa_ep - * - * Returns 1 if all criteria match between pxa and usb endpoint, 0 otherwise - */ -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; -} - -/** - * find_pxa_ep - find pxa_ep structure matching udc_usb_ep - * @udc: pxa udc - * @udc_usb_ep: udc_usb_ep structure - * - * Match udc_usb_ep and all pxa_ep available, to see if one matches. - * This is necessary because of the strong pxa hardware restriction requiring - * that once pxa endpoints are initialized, their configuration is freezed, and - * no change can be made to their address, direction, or in which configuration, - * interface or altsetting they are active ... which differs from more usual - * models which have endpoints be roughly just addressable fifos, and leave - * configuration events up to gadget drivers (like all control messages). - * - * Note that there is still a blurred point here : - * - we rely on UDCCR register "active interface" and "active altsetting". - * This is a nonsense in regard of USB spec, where multiple interfaces are - * active at the same time. - * - if we knew for sure that the pxa can handle multiple interface at the - * same time, assuming Intel's Developer Guide is wrong, this function - * should be reviewed, and a cache of couples (iface, altsetting) should - * be kept in the pxa_udc structure. In this case this function would match - * against the cache of couples instead of the "last altsetting" set up. - * - * Returns the matched pxa_ep structure or NULL if none found - */ -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; -} - -/** - * update_pxa_ep_matches - update pxa_ep cached values in all udc_usb_ep - * @udc: pxa udc - * - * Context: in_interrupt() - * - * Updates all pxa_ep fields in udc_usb_ep structures, if this field was - * previously set up (and is not NULL). The update is necessary is a - * configuration change or altsetting change was issued by the USB host. - */ -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); - } -} - -/** - * pio_irq_enable - Enables irq generation for one endpoint - * @ep: udc endpoint - */ -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))); -} - -/** - * pio_irq_disable - Disables irq generation for one endpoint - * @ep: udc endpoint - */ -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))); -} - -/** - * udc_set_mask_UDCCR - set bits in UDCCR - * @udc: udc device - * @mask: bits to set in UDCCR - * - * Sets bits in UDCCR, leaving DME and FST bits as they were. - */ -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)); -} - -/** - * udc_clear_mask_UDCCR - clears bits in UDCCR - * @udc: udc device - * @mask: bit to clear in UDCCR - * - * Clears bits in UDCCR, leaving DME and FST bits as they were. - */ -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)); -} - -/** - * ep_write_UDCCSR - set bits in UDCCSR - * @udc: udc device - * @mask: bits to set in UDCCR - * - * Sets bits in UDCCSR (UDCCSR0 and UDCCSR*). - * - * A specific case is applied to ep0 : the ACM bit is always set to 1, for - * SET_INTERFACE and SET_CONFIGURATION. - */ -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); -} - -/** - * ep_count_bytes_remain - get how many bytes in udc endpoint - * @ep: udc endpoint - * - * Returns number of bytes in OUT fifos. Broken for IN fifos (-EOPNOTSUPP) - */ -static int ep_count_bytes_remain(struct pxa_ep *ep) -{ - if (ep->dir_in) - return -EOPNOTSUPP; - return udc_ep_readl(ep, UDCBCR) & 0x3ff; -} - -/** - * ep_is_empty - checks if ep has byte ready for reading - * @ep: udc endpoint - * - * If endpoint is the control endpoint, checks if there are bytes in the - * control endpoint fifo. If endpoint is a data endpoint, checks if bytes - * are ready for reading on OUT endpoint. - * - * Returns 0 if ep not empty, 1 if ep empty, -EOPNOTSUPP if IN endpoint - */ -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; -} - -/** - * ep_is_full - checks if ep has place to write bytes - * @ep: udc endpoint - * - * If endpoint is not the control endpoint and is an IN endpoint, checks if - * there is place to write bytes into the endpoint. - * - * Returns 0 if ep not full, 1 if ep full, -EOPNOTSUPP if OUT endpoint - */ -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)); -} - -/** - * epout_has_pkt - checks if OUT endpoint fifo has a packet available - * @ep: pxa endpoint - * - * Returns 1 if a complete packet is available, 0 if not, -EOPNOTSUPP for IN ep. - */ -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); -} - -/** - * set_ep0state - Set ep0 automata state - * @dev: udc device - * @state: state - */ -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)); -} - -/** - * ep0_idle - Put control endpoint into idle state - * @dev: udc device - */ -static void ep0_idle(struct pxa_udc *dev) -{ - set_ep0state(dev, WAIT_FOR_SETUP); -} - -/** - * inc_ep_stats_reqs - Update ep stats counts - * @ep: physical endpoint - * @req: usb request - * @is_in: ep direction (USB_DIR_IN or 0) - * - */ -static void inc_ep_stats_reqs(struct pxa_ep *ep, int is_in) -{ - if (is_in) - ep->stats.in_ops++; - else - ep->stats.out_ops++; -} - -/** - * inc_ep_stats_bytes - Update ep stats counts - * @ep: physical endpoint - * @count: bytes transferred on endpoint - * @is_in: ep direction (USB_DIR_IN or 0) - */ -static void inc_ep_stats_bytes(struct pxa_ep *ep, int count, int is_in) -{ - if (is_in) - ep->stats.in_bytes += count; - else - ep->stats.out_bytes += count; -} - -/** - * pxa_ep_setup - Sets up an usb physical endpoint - * @ep: pxa27x physical endpoint - * - * Find the physical pxa27x ep, and setup its UDCCR - */ -static 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); -} - -/** - * pxa_eps_setup - Sets up all usb physical endpoints - * @dev: udc device - * - * Setup all pxa physical endpoints, except ep0 - */ -static 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]); -} - -/** - * pxa_ep_alloc_request - Allocate usb request - * @_ep: usb endpoint - * @gfp_flags: - * - * For the pxa27x, these can just wrap kmalloc/kfree. gadget drivers - * must still pass correctly initialized endpoints, since other controller - * drivers may care about how it's currently set up (dma issues etc). - */ -static struct usb_request * -pxa_ep_alloc_request(struct usb_ep *_ep, gfp_t gfp_flags) -{ - struct pxa27x_request *req; - - req = kzalloc(sizeof *req, gfp_flags); - if (!req) - return NULL; - - 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; -} - -/** - * pxa_ep_free_request - Free usb request - * @_ep: usb endpoint - * @_req: usb request - * - * Wrapper around kfree to free _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); -} - -/** - * ep_add_request - add a request to the endpoint's queue - * @ep: usb endpoint - * @req: usb request - * - * Context: ep->lock held - * - * Queues the request in the endpoint's queue, and enables the interrupts - * on the endpoint. - */ -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); -} - -/** - * ep_del_request - removes a request from the endpoint's queue - * @ep: usb endpoint - * @req: usb request - * - * Context: ep->lock held - * - * Unqueue the request from the endpoint's queue. If there are no more requests - * on the endpoint, and if it's not the control endpoint, interrupts are - * disabled on the endpoint. - */ -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); -} - -/** - * req_done - Complete an usb request - * @ep: pxa physical endpoint - * @req: pxa request - * @status: usb request status sent to gadget API - * @pflags: flags of previous spinlock_irq_save() or NULL if no lock held - * - * Context: ep->lock held if flags not NULL, else ep->lock released - * - * Retire a pxa27x usb request. Endpoint must be locked. - */ -static void req_done(struct pxa_ep *ep, struct pxa27x_request *req, int status, - unsigned long *pflags) -{ - unsigned long flags; - - 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); - - if (pflags) - spin_unlock_irqrestore(&ep->lock, *pflags); - local_irq_save(flags); - req->req.complete(&req->udc_usb_ep->usb_ep, &req->req); - local_irq_restore(flags); - if (pflags) - spin_lock_irqsave(&ep->lock, *pflags); -} - -/** - * ep_end_out_req - Ends endpoint OUT request - * @ep: physical endpoint - * @req: pxa request - * @pflags: flags of previous spinlock_irq_save() or NULL if no lock held - * - * Context: ep->lock held or released (see req_done()) - * - * Ends endpoint OUT request (completes usb request). - */ -static void ep_end_out_req(struct pxa_ep *ep, struct pxa27x_request *req, - unsigned long *pflags) -{ - inc_ep_stats_reqs(ep, !USB_DIR_IN); - req_done(ep, req, 0, pflags); -} - -/** - * ep0_end_out_req - Ends control endpoint OUT request (ends data stage) - * @ep: physical endpoint - * @req: pxa request - * @pflags: flags of previous spinlock_irq_save() or NULL if no lock held - * - * Context: ep->lock held or released (see req_done()) - * - * Ends control endpoint OUT request (completes usb request), and puts - * control endpoint into idle state - */ -static void ep0_end_out_req(struct pxa_ep *ep, struct pxa27x_request *req, - unsigned long *pflags) -{ - set_ep0state(ep->dev, OUT_STATUS_STAGE); - ep_end_out_req(ep, req, pflags); - ep0_idle(ep->dev); -} - -/** - * ep_end_in_req - Ends endpoint IN request - * @ep: physical endpoint - * @req: pxa request - * @pflags: flags of previous spinlock_irq_save() or NULL if no lock held - * - * Context: ep->lock held or released (see req_done()) - * - * Ends endpoint IN request (completes usb request). - */ -static void ep_end_in_req(struct pxa_ep *ep, struct pxa27x_request *req, - unsigned long *pflags) -{ - inc_ep_stats_reqs(ep, USB_DIR_IN); - req_done(ep, req, 0, pflags); -} - -/** - * ep0_end_in_req - Ends control endpoint IN request (ends data stage) - * @ep: physical endpoint - * @req: pxa request - * @pflags: flags of previous spinlock_irq_save() or NULL if no lock held - * - * Context: ep->lock held or released (see req_done()) - * - * Ends control endpoint IN request (completes usb request), and puts - * control endpoint into status state - */ -static void ep0_end_in_req(struct pxa_ep *ep, struct pxa27x_request *req, - unsigned long *pflags) -{ - set_ep0state(ep->dev, IN_STATUS_STAGE); - ep_end_in_req(ep, req, pflags); -} - -/** - * nuke - Dequeue all requests - * @ep: pxa endpoint - * @status: usb request status - * - * Context: ep->lock released - * - * Dequeues all requests on an endpoint. As a side effect, interrupts will be - * disabled on that endpoint (because no more requests). - */ -static void nuke(struct pxa_ep *ep, int status) -{ - struct pxa27x_request *req; - unsigned long flags; - - spin_lock_irqsave(&ep->lock, flags); - while (!list_empty(&ep->queue)) { - req = list_entry(ep->queue.next, struct pxa27x_request, queue); - req_done(ep, req, status, &flags); - } - spin_unlock_irqrestore(&ep->lock, flags); -} - -/** - * read_packet - transfer 1 packet from an OUT endpoint into request - * @ep: pxa physical endpoint - * @req: usb request - * - * Takes bytes from OUT endpoint and transfers them info the usb request. - * If there is less space in request than bytes received in OUT endpoint, - * bytes are left in the OUT endpoint. - * - * Returns how many bytes were actually transferred - */ -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); - prefetchw(buf); - - 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; -} - -/** - * write_packet - transfer 1 packet from request into an IN endpoint - * @ep: pxa physical endpoint - * @req: usb request - * @max: max bytes that fit into endpoint - * - * Takes bytes from usb request, and transfers them into the physical - * endpoint. If there are no bytes to transfer, doesn't write anything - * to physical endpoint. - * - * Returns how many bytes were actually transferred. - */ -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; -} - -/** - * read_fifo - Transfer packets from OUT endpoint into usb request - * @ep: pxa physical endpoint - * @req: usb request - * - * Context: callable when in_interrupt() - * - * Unload as many packets as possible from the fifo we use for usb OUT - * transfers and put them into the request. Caller should have made sure - * there's at least one packet ready. - * Doesn't complete the request, that's the caller's job - * - * Returns 1 if the request completed, 0 otherwise - */ -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); - inc_ep_stats_bytes(ep, count, !USB_DIR_IN); - - 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; -} - -/** - * write_fifo - transfer packets from usb request into an IN endpoint - * @ep: pxa physical endpoint - * @req: pxa usb request - * - * Write to an IN endpoint fifo, as many packets as possible. - * irqs will use this to write the rest later. - * caller guarantees at least one packet buffer is ready (or a zlp). - * Doesn't complete the request, that's the caller's job - * - * Returns 1 if request fully transferred, 0 if partial transfer - */ -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); - inc_ep_stats_bytes(ep, count, USB_DIR_IN); - 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; -} - -/** - * read_ep0_fifo - Transfer packets from control endpoint into usb request - * @ep: control endpoint - * @req: pxa usb request - * - * Special ep0 version of the above read_fifo. Reads as many bytes from control - * endpoint as can be read, and stores them into usb request (limited by request - * maximum length). - * - * Returns 0 if usb request only partially filled, 1 if fully filled - */ -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); - inc_ep_stats_bytes(ep, count, !USB_DIR_IN); - - 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; -} - -/** - * write_ep0_fifo - Send a request to control endpoint (ep0 in) - * @ep: control endpoint - * @req: request - * - * Context: callable when in_interrupt() - * - * Sends a request (or a part of the request) to the control endpoint (ep0 in). - * If the request doesn't fit, the remaining part will be sent from irq. - * The request is considered fully written only if either : - * - last write transferred all remaining bytes, but fifo was not fully filled - * - last write was a 0 length write - * - * Returns 1 if request fully written, 0 if request only partially sent - */ -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); - inc_ep_stats_bytes(ep, count, USB_DIR_IN); - - 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; -} - -/** - * pxa_ep_queue - Queue a request into an IN endpoint - * @_ep: usb endpoint - * @_req: usb request - * @gfp_flags: flags - * - * Context: normally called when !in_interrupt, but callable when in_interrupt() - * in the special case of ep0 setup : - * (irq->handle_ep0_ctrl_req->gadget_setup->pxa_ep_queue) - * - * Returns 0 if succedeed, error otherwise - */ -static int pxa_ep_queue(struct usb_ep *_ep, struct usb_request *_req, - gfp_t gfp_flags) -{ - struct udc_usb_ep *udc_usb_ep; - struct pxa_ep *ep; - struct pxa27x_request *req; - struct pxa_udc *dev; - unsigned long flags; - int rc = 0; - int is_first_req; - unsigned length; - int recursion_detected; - - 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; - - spin_lock_irqsave(&ep->lock, flags); - recursion_detected = ep->in_handle_ep; - - 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); - spin_unlock_irqrestore(&ep->lock, flags); - - if (is_ep0(ep)) { - switch (dev->ep0state) { - case WAIT_ACK_SET_CONF_INTERF: - if (length == 0) { - ep_end_in_req(ep, req, NULL); - } 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, NULL); - break; - case OUT_DATA_STAGE: - if ((length == 0) || !epout_has_pkt(ep)) - if (read_ep0_fifo(ep, req)) - ep0_end_out_req(ep, req, NULL); - 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 { - if (!recursion_detected) - handle_ep(ep); - } - -out: - return rc; -out_locked: - spin_unlock_irqrestore(&ep->lock, flags); - goto out; -} - -/** - * pxa_ep_dequeue - Dequeue one request - * @_ep: usb endpoint - * @_req: usb request - * - * Return 0 if no error, -EINVAL or -ECONNRESET otherwise - */ -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; - unsigned long flags; - 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; - - spin_lock_irqsave(&ep->lock, flags); - - /* make sure it's actually queued on this endpoint */ - list_for_each_entry(req, &ep->queue, queue) { - if (&req->req == _req) { - rc = 0; - break; - } - } - - spin_unlock_irqrestore(&ep->lock, flags); - if (!rc) - req_done(ep, req, -ECONNRESET, NULL); - return rc; -} - -/** - * pxa_ep_set_halt - Halts operations on one endpoint - * @_ep: usb endpoint - * @value: - * - * Returns 0 if no error, -EINVAL, -EROFS, -EAGAIN otherwise - */ -static int pxa_ep_set_halt(struct usb_ep *_ep, int value) -{ - struct pxa_ep *ep; - struct udc_usb_ep *udc_usb_ep; - unsigned long flags; - 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; - } - - spin_lock_irqsave(&ep->lock, flags); - - 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: - spin_unlock_irqrestore(&ep->lock, flags); - return rc; -} - -/** - * pxa_ep_fifo_status - Get how many bytes in physical endpoint - * @_ep: usb endpoint - * - * Returns number of bytes in OUT fifos. Broken for IN fifos. - */ -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; -} - -/** - * pxa_ep_fifo_flush - Flushes one endpoint - * @_ep: usb endpoint - * - * Discards all data in one endpoint(IN or OUT), except control endpoint. - */ -static void pxa_ep_fifo_flush(struct usb_ep *_ep) -{ - struct pxa_ep *ep; - struct udc_usb_ep *udc_usb_ep; - unsigned long flags; - - 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; - - spin_lock_irqsave(&ep->lock, flags); - - 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)); - } - - spin_unlock_irqrestore(&ep->lock, flags); -} - -/** - * pxa_ep_enable - Enables usb endpoint - * @_ep: usb endpoint - * @desc: usb endpoint descriptor - * - * Nothing much to do here, as ep configuration is done once and for all - * before udc is enabled. After udc enable, no physical endpoint configuration - * can be changed. - * Function makes sanity checks and flushes the endpoint. - */ -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 < usb_endpoint_maxp(desc)) { - 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; -} - -/** - * pxa_ep_disable - Disable usb endpoint - * @_ep: usb endpoint - * - * Same as for pxa_ep_enable, no physical endpoint configuration can be - * changed. - * Function flushes the endpoint and related requests. - */ -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, -}; - -/** - * dplus_pullup - Connect or disconnect pullup resistor to D+ pin - * @udc: udc device - * @on: 0 if disconnect pullup resistor, 1 otherwise - * Context: any - * - * Handle D+ pullup resistor, make the device visible to the usb bus, and - * declare it as a full speed usb device - */ -static void dplus_pullup(struct pxa_udc *udc, int on) -{ - if (on) { - if (gpio_is_valid(udc->mach->gpio_pullup)) - 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 (gpio_is_valid(udc->mach->gpio_pullup)) - 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); -} - -/** - * pxa_udc_wakeup - Force udc device out of suspend - * @_gadget: usb gadget - * - * Returns 0 if successful, error code otherwise - */ -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); - -/** - * should_enable_udc - Tells if UDC should be enabled - * @udc: udc device - * Context: any - * - * The UDC should be enabled if : - - * - the pullup resistor is connected - * - and a gadget driver is bound - * - and vbus is sensed (or no vbus sense is available) - * - * Returns 1 if UDC should be enabled, 0 otherwise - */ -static int should_enable_udc(struct pxa_udc *udc) -{ - int put_on; - - put_on = ((udc->pullup_on) && (udc->driver)); - put_on &= ((udc->vbus_sensed) || (IS_ERR_OR_NULL(udc->transceiver))); - return put_on; -} - -/** - * should_disable_udc - Tells if UDC should be disabled - * @udc: udc device - * Context: any - * - * The UDC should be disabled if : - * - the pullup resistor is not connected - * - or no gadget driver is bound - * - or no vbus is sensed (when vbus sesing is available) - * - * Returns 1 if UDC should be disabled - */ -static int should_disable_udc(struct pxa_udc *udc) -{ - int put_off; - - put_off = ((!udc->pullup_on) || (!udc->driver)); - put_off |= ((!udc->vbus_sensed) && (!IS_ERR_OR_NULL(udc->transceiver))); - return put_off; -} - -/** - * pxa_udc_pullup - Offer manual D+ pullup control - * @_gadget: usb gadget using the control - * @is_active: 0 if disconnect, else connect D+ pullup resistor - * Context: !in_interrupt() - * - * Returns 0 if OK, -EOPNOTSUPP if udc driver doesn't handle D+ pullup - */ -static int pxa_udc_pullup(struct usb_gadget *_gadget, int is_active) -{ - struct pxa_udc *udc = to_gadget_udc(_gadget); - - if (!gpio_is_valid(udc->mach->gpio_pullup) && !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 void udc_enable(struct pxa_udc *udc); -static void udc_disable(struct pxa_udc *udc); - -/** - * pxa_udc_vbus_session - Called by external transceiver to enable/disable udc - * @_gadget: usb gadget - * @is_active: 0 if should disable the udc, 1 if should enable - * - * Enables the udc, and optionnaly activates D+ pullup resistor. Or disables the - * udc, and deactivates D+ pullup resistor. - * - * Returns 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; -} - -/** - * pxa_udc_vbus_draw - Called by gadget driver after SET_CONFIGURATION completed - * @_gadget: usb gadget - * @mA: current drawn - * - * Context: !in_interrupt() - * - * Called after a configuration was chosen by a USB host, to inform how much - * current can be drawn by the device from VBus line. - * - * Returns 0 or -EOPNOTSUPP if no transceiver is handling the udc - */ -static int pxa_udc_vbus_draw(struct usb_gadget *_gadget, unsigned mA) -{ - struct pxa_udc *udc; - - udc = to_gadget_udc(_gadget); - if (!IS_ERR_OR_NULL(udc->transceiver)) - return usb_phy_set_power(udc->transceiver, mA); - return -EOPNOTSUPP; -} - -static int pxa27x_udc_start(struct usb_gadget *g, - struct usb_gadget_driver *driver); -static int pxa27x_udc_stop(struct usb_gadget *g, - struct usb_gadget_driver *driver); - -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, - .vbus_draw = pxa_udc_vbus_draw, - .udc_start = pxa27x_udc_start, - .udc_stop = pxa27x_udc_stop, -}; - -/** - * udc_disable - disable udc device controller - * @udc: udc device - * Context: any - * - * Disables the udc device : disables clocks, udc interrupts, control endpoint - * interrupts. - */ -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(udc->clk); - - ep0_idle(udc); - udc->gadget.speed = USB_SPEED_UNKNOWN; - - udc->enabled = 0; -} - -/** - * udc_init_data - Initialize udc device data structures - * @dev: udc device - * - * Initializes gadget endpoint list, endpoints locks. No action is taken - * on the hardware. - */ -static 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); - spin_lock_init(&ep->lock); - } - - /* 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); - } -} - -/** - * udc_enable - Enables the udc device - * @dev: udc device - * - * Enables the udc device : enables clocks, udc interrupts, control endpoint - * interrupts, sets usb as UDC client and setups endpoints. - */ -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(udc->clk); - - 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 - */ - msleep(100); - - /* enable suspend/resume and reset irqs */ - udc_writel(udc, UDCICR1, - UDCICR1_IECC | UDCICR1_IERU - | UDCICR1_IESU | UDCICR1_IERS); - - /* enable ep0 irqs */ - pio_irq_enable(&udc->pxa_ep[0]); - - udc->enabled = 1; -} - -/** - * pxa27x_start - Register gadget driver - * @driver: gadget driver - * @bind: bind function - * - * When a driver is successfully registered, it will receive control requests - * including set_configuration(), which enables non-control requests. Then - * usb traffic follows until a disconnect is reported. Then a host may connect - * again, or the driver might get unbound. - * - * Note that the udc is not automatically enabled. Check function - * should_enable_udc(). - * - * Returns 0 if no error, -EINVAL, -ENODEV, -EBUSY otherwise - */ -static int pxa27x_udc_start(struct usb_gadget *g, - struct usb_gadget_driver *driver) -{ - struct pxa_udc *udc = to_pxa(g); - int retval; - - /* first hook up the driver ... */ - udc->driver = driver; - dplus_pullup(udc, 1); - - if (!IS_ERR_OR_NULL(udc->transceiver)) { - retval = otg_set_peripheral(udc->transceiver->otg, - &udc->gadget); - if (retval) { - dev_err(udc->dev, "can't bind to transceiver\n"); - goto fail; - } - } - - if (should_enable_udc(udc)) - udc_enable(udc); - return 0; - -fail: - udc->driver = NULL; - return retval; -} - -/** - * stop_activity - Stops udc endpoints - * @udc: udc device - * @driver: gadget driver - * - * Disables all udc endpoints (even control endpoint), report disconnect to - * the gadget user. - */ -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); -} - -/** - * pxa27x_udc_stop - Unregister the gadget driver - * @driver: gadget driver - * - * Returns 0 if no error, -ENODEV, -EINVAL otherwise - */ -static int pxa27x_udc_stop(struct usb_gadget *g, - struct usb_gadget_driver *driver) -{ - struct pxa_udc *udc = to_pxa(g); - - stop_activity(udc, driver); - udc_disable(udc); - dplus_pullup(udc, 0); - - udc->driver = NULL; - - if (!IS_ERR_OR_NULL(udc->transceiver)) - return otg_set_peripheral(udc->transceiver->otg, NULL); - return 0; -} - -/** - * handle_ep0_ctrl_req - handle control endpoint control request - * @udc: udc device - * @req: control request - */ -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; - unsigned long flags; - - nuke(ep, -EPROTO); - spin_lock_irqsave(&ep->lock, flags); - - /* - * 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); - - spin_unlock_irqrestore(&ep->lock, flags); - i = udc->driver->setup(&udc->gadget, &u.r); - spin_lock_irqsave(&ep->lock, flags); - if (i < 0) - goto stall; -out: - spin_unlock_irqrestore(&ep->lock, flags); - 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; -} - -/** - * handle_ep0 - Handle control endpoint data transfers - * @udc: udc device - * @fifo_irq: 1 if triggered by fifo service type irq - * @opc_irq: 1 if triggered by output packet complete type irq - * - * Context : when in_interrupt() or with ep->lock held - * - * Tries to transfer all pending request data into the endpoint and/or - * transfer all pending data in the endpoint into usb requests. - * Handles states of ep0 automata. - * - * PXA27x hardware handles several standard usb control requests without - * driver notification. The requests fully handled by hardware are : - * SET_ADDRESS, SET_FEATURE, CLEAR_FEATURE, GET_CONFIGURATION, GET_INTERFACE, - * GET_STATUS - * The requests handled by hardware, but with irq notification are : - * SYNCH_FRAME, SET_CONFIGURATION, SET_INTERFACE - * The remaining standard requests really handled by handle_ep0 are : - * GET_DESCRIPTOR, SET_DESCRIPTOR, specific requests. - * Requests standardized outside of USB 2.0 chapter 9 are handled more - * uniformly, by gadget drivers. - * - * The control endpoint state machine is _not_ USB spec compliant, it's even - * hardly compliant with Intel PXA270 developers guide. - * The key points which inferred this state machine are : - * - on every setup token, bit UDCCSR0_SA is raised and held until cleared by - * software. - * - on every OUT packet received, UDCCSR0_OPC is raised and held until - * cleared by software. - * - clearing UDCCSR0_OPC always flushes ep0. If in setup stage, never do it - * before reading ep0. - * This is true only for PXA27x. This is not true anymore for PXA3xx family - * (check Back-to-Back setup packet in developers guide). - * - irq can be called on a "packet complete" event (opc_irq=1), while - * UDCCSR0_OPC is not yet raised (delta can be as big as 100ms - * from experimentation). - * - as UDCCSR0_SA can be activated while in irq handling, and clearing - * UDCCSR0_OPC would flush the setup data, we almost never clear UDCCSR0_OPC - * => we never actually read the "status stage" packet of an IN data stage - * => this is not documented in Intel documentation - * - hardware as no idea of STATUS STAGE, it only handle SETUP STAGE and DATA - * STAGE. The driver add STATUS STAGE to send last zero length packet in - * OUT_STATUS_STAGE. - * - special attention was needed for IN_STATUS_STAGE. If a packet complete - * event is detected, we terminate the status stage without ackowledging the - * packet (not to risk to loose a potential SETUP packet) - */ -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, NULL); - 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, NULL); - 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; - } -} - -/** - * handle_ep - Handle endpoint data tranfers - * @ep: pxa physical endpoint - * - * Tries to transfer all pending request data into the endpoint and/or - * transfer all pending data in the endpoint into usb requests. - * - * Is always called when in_interrupt() and with ep->lock released. - */ -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; - unsigned long flags; - - spin_lock_irqsave(&ep->lock, flags); - if (ep->in_handle_ep) - goto recursion_detected; - ep->in_handle_ep = 1; - - 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, &flags); - else - ep_end_out_req(ep, req, &flags); - } - } while (completed); - - ep->in_handle_ep = 0; -recursion_detected: - spin_unlock_irqrestore(&ep->lock, flags); -} - -/** - * pxa27x_change_configuration - Handle SET_CONF usb request notification - * @udc: udc device - * @config: usb configuration - * - * Post the request to upper level. - * Don't use any pxa specific harware configuration capabilities - */ -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); - ep_write_UDCCSR(&udc->pxa_ep[0], UDCCSR0_AREN); -} - -/** - * pxa27x_change_interface - Handle SET_INTERF usb request notification - * @udc: udc device - * @iface: interface number - * @alt: alternate setting number - * - * Post the request to upper level. - * Don't use any pxa specific harware configuration capabilities - */ -static void 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); - udc->driver->setup(&udc->gadget, &req); - ep_write_UDCCSR(&udc->pxa_ep[0], UDCCSR0_AREN); -} - -/* - * irq_handle_data - Handle data transfer - * @irq: irq IRQ number - * @udc: dev pxa_udc device structure - * - * Called from irq handler, transferts data to or from endpoint to queue - */ -static void irq_handle_data(int irq, 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->pxa_ep[0].stats.irqs++; - 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]; - ep->stats.irqs++; - 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]; - ep->stats.irqs++; - handle_ep(ep); - } - } - -} - -/** - * irq_udc_suspend - Handle IRQ "UDC Suspend" - * @udc: udc device - */ -static void irq_udc_suspend(struct pxa_udc *udc) -{ - udc_writel(udc, UDCISR1, UDCISR1_IRSU); - udc->stats.irqs_suspend++; - - if (udc->gadget.speed != USB_SPEED_UNKNOWN - && udc->driver && udc->driver->suspend) - udc->driver->suspend(&udc->gadget); - ep0_idle(udc); -} - -/** - * irq_udc_resume - Handle IRQ "UDC Resume" - * @udc: udc device - */ -static void irq_udc_resume(struct pxa_udc *udc) -{ - udc_writel(udc, UDCISR1, UDCISR1_IRRU); - udc->stats.irqs_resume++; - - if (udc->gadget.speed != USB_SPEED_UNKNOWN - && udc->driver && udc->driver->resume) - udc->driver->resume(&udc->gadget); -} - -/** - * irq_udc_reconfig - Handle IRQ "UDC Change Configuration" - * @udc: udc device - */ -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); - udc->stats.irqs_reconfig++; - - config = (udccr & UDCCR_ACN) >> UDCCR_ACN_S; - config_change = (config != udc->config); - pxa27x_change_configuration(udc, config); - - interface = (udccr & UDCCR_AIN) >> UDCCR_AIN_S; - alternate = (udccr & UDCCR_AAISN) >> UDCCR_AAISN_S; - pxa27x_change_interface(udc, interface, alternate); - - if (config_change) - update_pxa_ep_matches(udc); - udc_set_mask_UDCCR(udc, UDCCR_SMAC); -} - -/** - * irq_udc_reset - Handle IRQ "UDC Reset" - * @udc: udc device - */ -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); - udc->stats.irqs_reset++; - - if ((udccr & UDCCR_UDA) == 0) { - dev_dbg(udc->dev, "USB reset start\n"); - stop_activity(udc, udc->driver); - } - udc->gadget.speed = USB_SPEED_FULL; - memset(&udc->stats, 0, sizeof udc->stats); - - nuke(ep, -EPROTO); - ep_write_UDCCSR(ep, UDCCSR0_FTF | UDCCSR0_OPC); - ep0_idle(udc); -} - -/** - * pxa_udc_irq - Main irq handler - * @irq: irq number - * @_dev: udc device - * - * Handles all udc interrupts - */ -static irqreturn_t pxa_udc_irq(int irq, void *_dev) -{ - struct pxa_udc *udc = _dev; - u32 udcisr0 = udc_readl(udc, UDCISR0); - u32 udcisr1 = udc_readl(udc, UDCISR1); - u32 udccr = udc_readl(udc, UDCCR); - u32 udcisr1_spec; - - dev_vdbg(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(irq, udc); - - return IRQ_HANDLED; -} - -static struct pxa_udc memory = { - .gadget = { - .ops = &pxa_udc_ops, - .ep0 = &memory.udc_usb_ep[0].usb_ep, - .name = driver_name, - .dev = { - .init_name = "gadget", - }, - }, - - .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), - } -}; - -/** - * pxa_udc_probe - probes the udc device - * @_dev: platform device - * - * Perform basic init : allocates udc clock, creates sysfs files, requests - * irq. - */ -static int pxa_udc_probe(struct platform_device *pdev) -{ - struct resource *regs; - struct pxa_udc *udc = &memory; - int retval = 0, gpio; - - regs = platform_get_resource(pdev, IORESOURCE_MEM, 0); - if (!regs) - return -ENXIO; - udc->irq = platform_get_irq(pdev, 0); - if (udc->irq < 0) - return udc->irq; - - udc->dev = &pdev->dev; - udc->mach = dev_get_platdata(&pdev->dev); - udc->transceiver = usb_get_phy(USB_PHY_TYPE_USB2); - - gpio = udc->mach->gpio_pullup; - if (gpio_is_valid(gpio)) { - retval = gpio_request(gpio, "USB D+ pullup"); - if (retval == 0) - gpio_direction_output(gpio, - udc->mach->gpio_pullup_inverted); - } - if (retval) { - dev_err(&pdev->dev, "Couldn't request gpio %d : %d\n", - gpio, retval); - return retval; - } - - udc->clk = clk_get(&pdev->dev, NULL); - if (IS_ERR(udc->clk)) { - retval = PTR_ERR(udc->clk); - goto err_clk; - } - - retval = -ENOMEM; - udc->regs = ioremap(regs->start, resource_size(regs)); - if (!udc->regs) { - dev_err(&pdev->dev, "Unable to map UDC I/O memory\n"); - goto err_map; - } - - udc->vbus_sensed = 0; - - the_controller = udc; - platform_set_drvdata(pdev, udc); - udc_init_data(udc); - pxa_eps_setup(udc); - - /* irq setup after old hardware state is cleaned up */ - retval = request_irq(udc->irq, pxa_udc_irq, - IRQF_SHARED, driver_name, udc); - if (retval != 0) { - dev_err(udc->dev, "%s: can't get irq %i, err %d\n", - driver_name, udc->irq, retval); - goto err_irq; - } - - retval = usb_add_gadget_udc(&pdev->dev, &udc->gadget); - if (retval) - goto err_add_udc; - - pxa_init_debugfs(udc); - - return 0; - -err_add_udc: - free_irq(udc->irq, udc); -err_irq: - iounmap(udc->regs); -err_map: - clk_put(udc->clk); - udc->clk = NULL; -err_clk: - return retval; -} - -/** - * pxa_udc_remove - removes the udc device driver - * @_dev: platform device - */ -static int pxa_udc_remove(struct platform_device *_dev) -{ - struct pxa_udc *udc = platform_get_drvdata(_dev); - int gpio = udc->mach->gpio_pullup; - - usb_del_gadget_udc(&udc->gadget); - usb_gadget_unregister_driver(udc->driver); - free_irq(udc->irq, udc); - pxa_cleanup_debugfs(udc); - if (gpio_is_valid(gpio)) - gpio_free(gpio); - - usb_put_phy(udc->transceiver); - - udc->transceiver = NULL; - the_controller = NULL; - clk_put(udc->clk); - iounmap(udc->regs); - - return 0; -} - -static void pxa_udc_shutdown(struct platform_device *_dev) -{ - struct pxa_udc *udc = platform_get_drvdata(_dev); - - if (udc_readl(udc, UDCCR) & UDCCR_UDE) - udc_disable(udc); -} - -#ifdef CONFIG_PXA27x -extern void pxa27x_clear_otgph(void); -#else -#define pxa27x_clear_otgph() do {} while (0) -#endif - -#ifdef CONFIG_PM -/** - * pxa_udc_suspend - Suspend udc device - * @_dev: platform device - * @state: suspend state - * - * Suspends udc : saves configuration registers (UDCCR*), then disables the udc - * device. - */ -static int pxa_udc_suspend(struct platform_device *_dev, pm_message_t state) -{ - int i; - struct pxa_udc *udc = platform_get_drvdata(_dev); - struct pxa_ep *ep; - - ep = &udc->pxa_ep[0]; - udc->udccsr0 = udc_ep_readl(ep, UDCCSR); - for (i = 1; i < NR_PXA_ENDPOINTS; i++) { - ep = &udc->pxa_ep[i]; - ep->udccsr_value = udc_ep_readl(ep, UDCCSR); - ep->udccr_value = udc_ep_readl(ep, UDCCR); - ep_dbg(ep, "udccsr:0x%03x, udccr:0x%x\n", - ep->udccsr_value, ep->udccr_value); - } - - udc_disable(udc); - udc->pullup_resume = udc->pullup_on; - dplus_pullup(udc, 0); - - return 0; -} - -/** - * pxa_udc_resume - Resume udc device - * @_dev: platform device - * - * Resumes udc : restores configuration registers (UDCCR*), then enables the udc - * device. - */ -static int pxa_udc_resume(struct platform_device *_dev) -{ - int i; - struct pxa_udc *udc = platform_get_drvdata(_dev); - struct pxa_ep *ep; - - ep = &udc->pxa_ep[0]; - udc_ep_writel(ep, UDCCSR, udc->udccsr0 & (UDCCSR0_FST | UDCCSR0_DME)); - for (i = 1; i < NR_PXA_ENDPOINTS; i++) { - ep = &udc->pxa_ep[i]; - udc_ep_writel(ep, UDCCSR, ep->udccsr_value); - udc_ep_writel(ep, UDCCR, ep->udccr_value); - ep_dbg(ep, "udccsr:0x%03x, udccr:0x%x\n", - ep->udccsr_value, ep->udccr_value); - } - - dplus_pullup(udc, udc->pullup_resume); - if (should_enable_udc(udc)) - udc_enable(udc); - /* - * We do not handle OTG yet. - * - * OTGPH bit is set when sleep mode is entered. - * it indicates that OTG pad is retaining its state. - * Upon exit from sleep mode and before clearing OTGPH, - * Software must configure the USB OTG pad, UDC, and UHC - * to the state they were in before entering sleep mode. - */ - pxa27x_clear_otgph(); - - return 0; -} -#endif - -/* work with hotplug and coldplug */ -MODULE_ALIAS("platform:pxa27x-udc"); - -static struct platform_driver udc_driver = { - .driver = { - .name = "pxa27x-udc", - .owner = THIS_MODULE, - }, - .probe = pxa_udc_probe, - .remove = pxa_udc_remove, - .shutdown = pxa_udc_shutdown, -#ifdef CONFIG_PM - .suspend = pxa_udc_suspend, - .resume = pxa_udc_resume -#endif -}; - -module_platform_driver(udc_driver); - -MODULE_DESCRIPTION(DRIVER_DESC); -MODULE_AUTHOR("Robert Jarzmik"); -MODULE_LICENSE("GPL"); |
