Robert Jarzmik | d75379a | 2008-04-18 15:56:49 -0700 | [diff] [blame] | 1 | /* |
| 2 | * Handles the Intel 27x USB Device Controller (UDC) |
| 3 | * |
| 4 | * Inspired by original driver by Frank Becker, David Brownell, and others. |
| 5 | * Copyright (C) 2008 Robert Jarzmik |
| 6 | * |
| 7 | * This program is free software; you can redistribute it and/or modify |
| 8 | * it under the terms of the GNU General Public License as published by |
| 9 | * the Free Software Foundation; either version 2 of the License, or |
| 10 | * (at your option) any later version. |
Robert Jarzmik | d75379a | 2008-04-18 15:56:49 -0700 | [diff] [blame] | 11 | */ |
| 12 | #include <linux/module.h> |
| 13 | #include <linux/kernel.h> |
| 14 | #include <linux/types.h> |
Robert Jarzmik | d75379a | 2008-04-18 15:56:49 -0700 | [diff] [blame] | 15 | #include <linux/errno.h> |
Kishon Vijay Abraham I | ded017e | 2012-06-26 17:40:32 +0530 | [diff] [blame] | 16 | #include <linux/err.h> |
Robert Jarzmik | d75379a | 2008-04-18 15:56:49 -0700 | [diff] [blame] | 17 | #include <linux/platform_device.h> |
| 18 | #include <linux/delay.h> |
| 19 | #include <linux/list.h> |
| 20 | #include <linux/interrupt.h> |
| 21 | #include <linux/proc_fs.h> |
| 22 | #include <linux/clk.h> |
| 23 | #include <linux/irq.h> |
Robert Jarzmik | eb50702 | 2009-01-24 23:55:34 -0800 | [diff] [blame] | 24 | #include <linux/gpio.h> |
Robert Jarzmik | 2db88a7 | 2014-10-01 22:06:14 +0200 | [diff] [blame] | 25 | #include <linux/gpio/consumer.h> |
Tejun Heo | 5a0e3ad | 2010-03-24 17:04:11 +0900 | [diff] [blame] | 26 | #include <linux/slab.h> |
Linus Torvalds | 268bb0c | 2011-05-20 12:50:29 -0700 | [diff] [blame] | 27 | #include <linux/prefetch.h> |
Felipe Balbi | 756380e | 2013-02-25 09:46:18 +0200 | [diff] [blame] | 28 | #include <linux/byteorder/generic.h> |
| 29 | #include <linux/platform_data/pxa2xx_udc.h> |
Robert Jarzmik | 1803fe1 | 2014-10-01 22:06:16 +0200 | [diff] [blame] | 30 | #include <linux/of_device.h> |
| 31 | #include <linux/of_gpio.h> |
Robert Jarzmik | d75379a | 2008-04-18 15:56:49 -0700 | [diff] [blame] | 32 | |
| 33 | #include <linux/usb.h> |
| 34 | #include <linux/usb/ch9.h> |
| 35 | #include <linux/usb/gadget.h> |
Robert Jarzmik | d75379a | 2008-04-18 15:56:49 -0700 | [diff] [blame] | 36 | |
| 37 | #include "pxa27x_udc.h" |
| 38 | |
| 39 | /* |
| 40 | * This driver handles the USB Device Controller (UDC) in Intel's PXA 27x |
| 41 | * series processors. |
| 42 | * |
| 43 | * Such controller drivers work with a gadget driver. The gadget driver |
| 44 | * returns descriptors, implements configuration and data protocols used |
| 45 | * by the host to interact with this device, and allocates endpoints to |
| 46 | * the different protocol interfaces. The controller driver virtualizes |
| 47 | * usb hardware so that the gadget drivers will be more portable. |
| 48 | * |
| 49 | * This UDC hardware wants to implement a bit too much USB protocol. The |
| 50 | * biggest issues are: that the endpoints have to be set up before the |
| 51 | * controller can be enabled (minor, and not uncommon); and each endpoint |
| 52 | * can only have one configuration, interface and alternative interface |
| 53 | * number (major, and very unusual). Once set up, these cannot be changed |
| 54 | * without a controller reset. |
| 55 | * |
| 56 | * The workaround is to setup all combinations necessary for the gadgets which |
| 57 | * will work with this driver. This is done in pxa_udc structure, statically. |
| 58 | * See pxa_udc, udc_usb_ep versus pxa_ep, and matching function find_pxa_ep. |
| 59 | * (You could modify this if needed. Some drivers have a "fifo_mode" module |
| 60 | * parameter to facilitate such changes.) |
| 61 | * |
| 62 | * The combinations have been tested with these gadgets : |
| 63 | * - zero gadget |
| 64 | * - file storage gadget |
| 65 | * - ether gadget |
| 66 | * |
| 67 | * The driver doesn't use DMA, only IO access and IRQ callbacks. No use is |
| 68 | * made of UDC's double buffering either. USB "On-The-Go" is not implemented. |
| 69 | * |
| 70 | * All the requests are handled the same way : |
| 71 | * - the drivers tries to handle the request directly to the IO |
| 72 | * - if the IO fifo is not big enough, the remaining is send/received in |
| 73 | * interrupt handling. |
| 74 | */ |
| 75 | |
| 76 | #define DRIVER_VERSION "2008-04-18" |
| 77 | #define DRIVER_DESC "PXA 27x USB Device Controller driver" |
| 78 | |
| 79 | static const char driver_name[] = "pxa27x_udc"; |
| 80 | static struct pxa_udc *the_controller; |
| 81 | |
| 82 | static void handle_ep(struct pxa_ep *ep); |
| 83 | |
| 84 | /* |
| 85 | * Debug filesystem |
| 86 | */ |
| 87 | #ifdef CONFIG_USB_GADGET_DEBUG_FS |
| 88 | |
| 89 | #include <linux/debugfs.h> |
| 90 | #include <linux/uaccess.h> |
| 91 | #include <linux/seq_file.h> |
| 92 | |
| 93 | static int state_dbg_show(struct seq_file *s, void *p) |
| 94 | { |
| 95 | struct pxa_udc *udc = s->private; |
Robert Jarzmik | d75379a | 2008-04-18 15:56:49 -0700 | [diff] [blame] | 96 | u32 tmp; |
| 97 | |
Robert Jarzmik | d75379a | 2008-04-18 15:56:49 -0700 | [diff] [blame] | 98 | if (!udc->driver) |
Joe Perches | 25140ce | 2015-02-21 18:53:37 -0800 | [diff] [blame] | 99 | return -ENODEV; |
Robert Jarzmik | d75379a | 2008-04-18 15:56:49 -0700 | [diff] [blame] | 100 | |
| 101 | /* basic device status */ |
Joe Perches | 25140ce | 2015-02-21 18:53:37 -0800 | [diff] [blame] | 102 | seq_printf(s, DRIVER_DESC "\n" |
| 103 | "%s version: %s\n" |
| 104 | "Gadget driver: %s\n", |
| 105 | driver_name, DRIVER_VERSION, |
| 106 | udc->driver ? udc->driver->driver.name : "(none)"); |
Robert Jarzmik | d75379a | 2008-04-18 15:56:49 -0700 | [diff] [blame] | 107 | |
| 108 | tmp = udc_readl(udc, UDCCR); |
Joe Perches | 25140ce | 2015-02-21 18:53:37 -0800 | [diff] [blame] | 109 | seq_printf(s, |
| 110 | "udccr=0x%0x(%s%s%s%s%s%s%s%s%s%s), con=%d,inter=%d,altinter=%d\n", |
| 111 | tmp, |
| 112 | (tmp & UDCCR_OEN) ? " oen":"", |
| 113 | (tmp & UDCCR_AALTHNP) ? " aalthnp":"", |
| 114 | (tmp & UDCCR_AHNP) ? " rem" : "", |
| 115 | (tmp & UDCCR_BHNP) ? " rstir" : "", |
| 116 | (tmp & UDCCR_DWRE) ? " dwre" : "", |
| 117 | (tmp & UDCCR_SMAC) ? " smac" : "", |
| 118 | (tmp & UDCCR_EMCE) ? " emce" : "", |
| 119 | (tmp & UDCCR_UDR) ? " udr" : "", |
| 120 | (tmp & UDCCR_UDA) ? " uda" : "", |
| 121 | (tmp & UDCCR_UDE) ? " ude" : "", |
| 122 | (tmp & UDCCR_ACN) >> UDCCR_ACN_S, |
| 123 | (tmp & UDCCR_AIN) >> UDCCR_AIN_S, |
| 124 | (tmp & UDCCR_AAISN) >> UDCCR_AAISN_S); |
Robert Jarzmik | d75379a | 2008-04-18 15:56:49 -0700 | [diff] [blame] | 125 | /* registers for device and ep0 */ |
Joe Perches | 25140ce | 2015-02-21 18:53:37 -0800 | [diff] [blame] | 126 | seq_printf(s, "udcicr0=0x%08x udcicr1=0x%08x\n", |
| 127 | udc_readl(udc, UDCICR0), udc_readl(udc, UDCICR1)); |
| 128 | seq_printf(s, "udcisr0=0x%08x udcisr1=0x%08x\n", |
| 129 | udc_readl(udc, UDCISR0), udc_readl(udc, UDCISR1)); |
| 130 | seq_printf(s, "udcfnr=%d\n", udc_readl(udc, UDCFNR)); |
| 131 | seq_printf(s, "irqs: reset=%lu, suspend=%lu, resume=%lu, reconfig=%lu\n", |
| 132 | udc->stats.irqs_reset, udc->stats.irqs_suspend, |
| 133 | udc->stats.irqs_resume, udc->stats.irqs_reconfig); |
Robert Jarzmik | d75379a | 2008-04-18 15:56:49 -0700 | [diff] [blame] | 134 | |
Joe Perches | 25140ce | 2015-02-21 18:53:37 -0800 | [diff] [blame] | 135 | return 0; |
Robert Jarzmik | d75379a | 2008-04-18 15:56:49 -0700 | [diff] [blame] | 136 | } |
| 137 | |
| 138 | static int queues_dbg_show(struct seq_file *s, void *p) |
| 139 | { |
| 140 | struct pxa_udc *udc = s->private; |
| 141 | struct pxa_ep *ep; |
| 142 | struct pxa27x_request *req; |
Joe Perches | 25140ce | 2015-02-21 18:53:37 -0800 | [diff] [blame] | 143 | int i, maxpkt; |
Robert Jarzmik | d75379a | 2008-04-18 15:56:49 -0700 | [diff] [blame] | 144 | |
Robert Jarzmik | d75379a | 2008-04-18 15:56:49 -0700 | [diff] [blame] | 145 | if (!udc->driver) |
Joe Perches | 25140ce | 2015-02-21 18:53:37 -0800 | [diff] [blame] | 146 | return -ENODEV; |
Robert Jarzmik | d75379a | 2008-04-18 15:56:49 -0700 | [diff] [blame] | 147 | |
| 148 | /* dump endpoint queues */ |
| 149 | for (i = 0; i < NR_PXA_ENDPOINTS; i++) { |
| 150 | ep = &udc->pxa_ep[i]; |
| 151 | maxpkt = ep->fifo_size; |
Joe Perches | 25140ce | 2015-02-21 18:53:37 -0800 | [diff] [blame] | 152 | seq_printf(s, "%-12s max_pkt=%d %s\n", |
| 153 | EPNAME(ep), maxpkt, "pio"); |
Robert Jarzmik | d75379a | 2008-04-18 15:56:49 -0700 | [diff] [blame] | 154 | |
| 155 | if (list_empty(&ep->queue)) { |
Joe Perches | 25140ce | 2015-02-21 18:53:37 -0800 | [diff] [blame] | 156 | seq_puts(s, "\t(nothing queued)\n"); |
Robert Jarzmik | d75379a | 2008-04-18 15:56:49 -0700 | [diff] [blame] | 157 | continue; |
| 158 | } |
| 159 | |
| 160 | list_for_each_entry(req, &ep->queue, queue) { |
Joe Perches | 25140ce | 2015-02-21 18:53:37 -0800 | [diff] [blame] | 161 | seq_printf(s, "\treq %p len %d/%d buf %p\n", |
| 162 | &req->req, req->req.actual, |
| 163 | req->req.length, req->req.buf); |
Robert Jarzmik | d75379a | 2008-04-18 15:56:49 -0700 | [diff] [blame] | 164 | } |
| 165 | } |
| 166 | |
Joe Perches | 25140ce | 2015-02-21 18:53:37 -0800 | [diff] [blame] | 167 | return 0; |
Robert Jarzmik | d75379a | 2008-04-18 15:56:49 -0700 | [diff] [blame] | 168 | } |
| 169 | |
| 170 | static int eps_dbg_show(struct seq_file *s, void *p) |
| 171 | { |
| 172 | struct pxa_udc *udc = s->private; |
| 173 | struct pxa_ep *ep; |
Joe Perches | 25140ce | 2015-02-21 18:53:37 -0800 | [diff] [blame] | 174 | int i; |
Robert Jarzmik | d75379a | 2008-04-18 15:56:49 -0700 | [diff] [blame] | 175 | u32 tmp; |
| 176 | |
Robert Jarzmik | d75379a | 2008-04-18 15:56:49 -0700 | [diff] [blame] | 177 | if (!udc->driver) |
Joe Perches | 25140ce | 2015-02-21 18:53:37 -0800 | [diff] [blame] | 178 | return -ENODEV; |
Robert Jarzmik | d75379a | 2008-04-18 15:56:49 -0700 | [diff] [blame] | 179 | |
| 180 | ep = &udc->pxa_ep[0]; |
| 181 | tmp = udc_ep_readl(ep, UDCCSR); |
Joe Perches | 25140ce | 2015-02-21 18:53:37 -0800 | [diff] [blame] | 182 | seq_printf(s, "udccsr0=0x%03x(%s%s%s%s%s%s%s)\n", |
| 183 | tmp, |
| 184 | (tmp & UDCCSR0_SA) ? " sa" : "", |
| 185 | (tmp & UDCCSR0_RNE) ? " rne" : "", |
| 186 | (tmp & UDCCSR0_FST) ? " fst" : "", |
| 187 | (tmp & UDCCSR0_SST) ? " sst" : "", |
| 188 | (tmp & UDCCSR0_DME) ? " dme" : "", |
| 189 | (tmp & UDCCSR0_IPR) ? " ipr" : "", |
| 190 | (tmp & UDCCSR0_OPC) ? " opc" : ""); |
Robert Jarzmik | d75379a | 2008-04-18 15:56:49 -0700 | [diff] [blame] | 191 | for (i = 0; i < NR_PXA_ENDPOINTS; i++) { |
| 192 | ep = &udc->pxa_ep[i]; |
| 193 | tmp = i? udc_ep_readl(ep, UDCCR) : udc_readl(udc, UDCCR); |
Joe Perches | 25140ce | 2015-02-21 18:53:37 -0800 | [diff] [blame] | 194 | seq_printf(s, "%-12s: IN %lu(%lu reqs), OUT %lu(%lu reqs), irqs=%lu, udccr=0x%08x, udccsr=0x%03x, udcbcr=%d\n", |
| 195 | EPNAME(ep), |
| 196 | ep->stats.in_bytes, ep->stats.in_ops, |
| 197 | ep->stats.out_bytes, ep->stats.out_ops, |
| 198 | ep->stats.irqs, |
| 199 | tmp, udc_ep_readl(ep, UDCCSR), |
| 200 | udc_ep_readl(ep, UDCBCR)); |
Robert Jarzmik | d75379a | 2008-04-18 15:56:49 -0700 | [diff] [blame] | 201 | } |
| 202 | |
Joe Perches | 25140ce | 2015-02-21 18:53:37 -0800 | [diff] [blame] | 203 | return 0; |
Robert Jarzmik | d75379a | 2008-04-18 15:56:49 -0700 | [diff] [blame] | 204 | } |
| 205 | |
| 206 | static int eps_dbg_open(struct inode *inode, struct file *file) |
| 207 | { |
| 208 | return single_open(file, eps_dbg_show, inode->i_private); |
| 209 | } |
| 210 | |
| 211 | static int queues_dbg_open(struct inode *inode, struct file *file) |
| 212 | { |
| 213 | return single_open(file, queues_dbg_show, inode->i_private); |
| 214 | } |
| 215 | |
| 216 | static int state_dbg_open(struct inode *inode, struct file *file) |
| 217 | { |
| 218 | return single_open(file, state_dbg_show, inode->i_private); |
| 219 | } |
| 220 | |
| 221 | static const struct file_operations state_dbg_fops = { |
| 222 | .owner = THIS_MODULE, |
| 223 | .open = state_dbg_open, |
| 224 | .llseek = seq_lseek, |
| 225 | .read = seq_read, |
| 226 | .release = single_release, |
| 227 | }; |
| 228 | |
| 229 | static const struct file_operations queues_dbg_fops = { |
| 230 | .owner = THIS_MODULE, |
| 231 | .open = queues_dbg_open, |
| 232 | .llseek = seq_lseek, |
| 233 | .read = seq_read, |
| 234 | .release = single_release, |
| 235 | }; |
| 236 | |
| 237 | static const struct file_operations eps_dbg_fops = { |
| 238 | .owner = THIS_MODULE, |
| 239 | .open = eps_dbg_open, |
| 240 | .llseek = seq_lseek, |
| 241 | .read = seq_read, |
| 242 | .release = single_release, |
| 243 | }; |
| 244 | |
| 245 | static void pxa_init_debugfs(struct pxa_udc *udc) |
| 246 | { |
| 247 | struct dentry *root, *state, *queues, *eps; |
| 248 | |
| 249 | root = debugfs_create_dir(udc->gadget.name, NULL); |
| 250 | if (IS_ERR(root) || !root) |
| 251 | goto err_root; |
| 252 | |
| 253 | state = debugfs_create_file("udcstate", 0400, root, udc, |
| 254 | &state_dbg_fops); |
| 255 | if (!state) |
| 256 | goto err_state; |
| 257 | queues = debugfs_create_file("queues", 0400, root, udc, |
| 258 | &queues_dbg_fops); |
| 259 | if (!queues) |
| 260 | goto err_queues; |
| 261 | eps = debugfs_create_file("epstate", 0400, root, udc, |
| 262 | &eps_dbg_fops); |
Julia Lawall | 00185a6 | 2008-12-21 16:41:36 +0100 | [diff] [blame] | 263 | if (!eps) |
Robert Jarzmik | d75379a | 2008-04-18 15:56:49 -0700 | [diff] [blame] | 264 | goto err_eps; |
| 265 | |
| 266 | udc->debugfs_root = root; |
| 267 | udc->debugfs_state = state; |
| 268 | udc->debugfs_queues = queues; |
| 269 | udc->debugfs_eps = eps; |
| 270 | return; |
| 271 | err_eps: |
| 272 | debugfs_remove(eps); |
| 273 | err_queues: |
| 274 | debugfs_remove(queues); |
| 275 | err_state: |
| 276 | debugfs_remove(root); |
| 277 | err_root: |
| 278 | dev_err(udc->dev, "debugfs is not available\n"); |
| 279 | } |
| 280 | |
| 281 | static void pxa_cleanup_debugfs(struct pxa_udc *udc) |
| 282 | { |
| 283 | debugfs_remove(udc->debugfs_eps); |
| 284 | debugfs_remove(udc->debugfs_queues); |
| 285 | debugfs_remove(udc->debugfs_state); |
| 286 | debugfs_remove(udc->debugfs_root); |
| 287 | udc->debugfs_eps = NULL; |
| 288 | udc->debugfs_queues = NULL; |
| 289 | udc->debugfs_state = NULL; |
| 290 | udc->debugfs_root = NULL; |
| 291 | } |
| 292 | |
| 293 | #else |
| 294 | static inline void pxa_init_debugfs(struct pxa_udc *udc) |
| 295 | { |
| 296 | } |
| 297 | |
| 298 | static inline void pxa_cleanup_debugfs(struct pxa_udc *udc) |
| 299 | { |
| 300 | } |
| 301 | #endif |
| 302 | |
| 303 | /** |
| 304 | * is_match_usb_pxa - check if usb_ep and pxa_ep match |
| 305 | * @udc_usb_ep: usb endpoint |
| 306 | * @ep: pxa endpoint |
| 307 | * @config: configuration required in pxa_ep |
| 308 | * @interface: interface required in pxa_ep |
| 309 | * @altsetting: altsetting required in pxa_ep |
| 310 | * |
| 311 | * Returns 1 if all criteria match between pxa and usb endpoint, 0 otherwise |
| 312 | */ |
| 313 | static int is_match_usb_pxa(struct udc_usb_ep *udc_usb_ep, struct pxa_ep *ep, |
| 314 | int config, int interface, int altsetting) |
| 315 | { |
| 316 | if (usb_endpoint_num(&udc_usb_ep->desc) != ep->addr) |
| 317 | return 0; |
| 318 | if (usb_endpoint_dir_in(&udc_usb_ep->desc) != ep->dir_in) |
| 319 | return 0; |
| 320 | if (usb_endpoint_type(&udc_usb_ep->desc) != ep->type) |
| 321 | return 0; |
| 322 | if ((ep->config != config) || (ep->interface != interface) |
| 323 | || (ep->alternate != altsetting)) |
| 324 | return 0; |
| 325 | return 1; |
| 326 | } |
| 327 | |
| 328 | /** |
| 329 | * find_pxa_ep - find pxa_ep structure matching udc_usb_ep |
| 330 | * @udc: pxa udc |
| 331 | * @udc_usb_ep: udc_usb_ep structure |
| 332 | * |
| 333 | * Match udc_usb_ep and all pxa_ep available, to see if one matches. |
| 334 | * This is necessary because of the strong pxa hardware restriction requiring |
| 335 | * that once pxa endpoints are initialized, their configuration is freezed, and |
| 336 | * no change can be made to their address, direction, or in which configuration, |
| 337 | * interface or altsetting they are active ... which differs from more usual |
| 338 | * models which have endpoints be roughly just addressable fifos, and leave |
| 339 | * configuration events up to gadget drivers (like all control messages). |
| 340 | * |
| 341 | * Note that there is still a blurred point here : |
| 342 | * - we rely on UDCCR register "active interface" and "active altsetting". |
| 343 | * This is a nonsense in regard of USB spec, where multiple interfaces are |
| 344 | * active at the same time. |
| 345 | * - if we knew for sure that the pxa can handle multiple interface at the |
| 346 | * same time, assuming Intel's Developer Guide is wrong, this function |
| 347 | * should be reviewed, and a cache of couples (iface, altsetting) should |
| 348 | * be kept in the pxa_udc structure. In this case this function would match |
| 349 | * against the cache of couples instead of the "last altsetting" set up. |
| 350 | * |
| 351 | * Returns the matched pxa_ep structure or NULL if none found |
| 352 | */ |
| 353 | static struct pxa_ep *find_pxa_ep(struct pxa_udc *udc, |
| 354 | struct udc_usb_ep *udc_usb_ep) |
| 355 | { |
| 356 | int i; |
| 357 | struct pxa_ep *ep; |
| 358 | int cfg = udc->config; |
| 359 | int iface = udc->last_interface; |
| 360 | int alt = udc->last_alternate; |
| 361 | |
| 362 | if (udc_usb_ep == &udc->udc_usb_ep[0]) |
| 363 | return &udc->pxa_ep[0]; |
| 364 | |
| 365 | for (i = 1; i < NR_PXA_ENDPOINTS; i++) { |
| 366 | ep = &udc->pxa_ep[i]; |
| 367 | if (is_match_usb_pxa(udc_usb_ep, ep, cfg, iface, alt)) |
| 368 | return ep; |
| 369 | } |
| 370 | return NULL; |
| 371 | } |
| 372 | |
| 373 | /** |
| 374 | * update_pxa_ep_matches - update pxa_ep cached values in all udc_usb_ep |
| 375 | * @udc: pxa udc |
| 376 | * |
| 377 | * Context: in_interrupt() |
| 378 | * |
| 379 | * Updates all pxa_ep fields in udc_usb_ep structures, if this field was |
| 380 | * previously set up (and is not NULL). The update is necessary is a |
| 381 | * configuration change or altsetting change was issued by the USB host. |
| 382 | */ |
| 383 | static void update_pxa_ep_matches(struct pxa_udc *udc) |
| 384 | { |
| 385 | int i; |
| 386 | struct udc_usb_ep *udc_usb_ep; |
| 387 | |
| 388 | for (i = 1; i < NR_USB_ENDPOINTS; i++) { |
| 389 | udc_usb_ep = &udc->udc_usb_ep[i]; |
| 390 | if (udc_usb_ep->pxa_ep) |
| 391 | udc_usb_ep->pxa_ep = find_pxa_ep(udc, udc_usb_ep); |
| 392 | } |
| 393 | } |
| 394 | |
| 395 | /** |
| 396 | * pio_irq_enable - Enables irq generation for one endpoint |
| 397 | * @ep: udc endpoint |
| 398 | */ |
| 399 | static void pio_irq_enable(struct pxa_ep *ep) |
| 400 | { |
| 401 | struct pxa_udc *udc = ep->dev; |
| 402 | int index = EPIDX(ep); |
| 403 | u32 udcicr0 = udc_readl(udc, UDCICR0); |
| 404 | u32 udcicr1 = udc_readl(udc, UDCICR1); |
| 405 | |
| 406 | if (index < 16) |
| 407 | udc_writel(udc, UDCICR0, udcicr0 | (3 << (index * 2))); |
| 408 | else |
| 409 | udc_writel(udc, UDCICR1, udcicr1 | (3 << ((index - 16) * 2))); |
| 410 | } |
| 411 | |
| 412 | /** |
| 413 | * pio_irq_disable - Disables irq generation for one endpoint |
| 414 | * @ep: udc endpoint |
Robert Jarzmik | d75379a | 2008-04-18 15:56:49 -0700 | [diff] [blame] | 415 | */ |
| 416 | static void pio_irq_disable(struct pxa_ep *ep) |
| 417 | { |
| 418 | struct pxa_udc *udc = ep->dev; |
| 419 | int index = EPIDX(ep); |
| 420 | u32 udcicr0 = udc_readl(udc, UDCICR0); |
| 421 | u32 udcicr1 = udc_readl(udc, UDCICR1); |
| 422 | |
| 423 | if (index < 16) |
| 424 | udc_writel(udc, UDCICR0, udcicr0 & ~(3 << (index * 2))); |
| 425 | else |
| 426 | udc_writel(udc, UDCICR1, udcicr1 & ~(3 << ((index - 16) * 2))); |
| 427 | } |
| 428 | |
| 429 | /** |
| 430 | * udc_set_mask_UDCCR - set bits in UDCCR |
| 431 | * @udc: udc device |
| 432 | * @mask: bits to set in UDCCR |
| 433 | * |
| 434 | * Sets bits in UDCCR, leaving DME and FST bits as they were. |
| 435 | */ |
| 436 | static inline void udc_set_mask_UDCCR(struct pxa_udc *udc, int mask) |
| 437 | { |
| 438 | u32 udccr = udc_readl(udc, UDCCR); |
| 439 | udc_writel(udc, UDCCR, |
| 440 | (udccr & UDCCR_MASK_BITS) | (mask & UDCCR_MASK_BITS)); |
| 441 | } |
| 442 | |
| 443 | /** |
| 444 | * udc_clear_mask_UDCCR - clears bits in UDCCR |
| 445 | * @udc: udc device |
| 446 | * @mask: bit to clear in UDCCR |
| 447 | * |
| 448 | * Clears bits in UDCCR, leaving DME and FST bits as they were. |
| 449 | */ |
| 450 | static inline void udc_clear_mask_UDCCR(struct pxa_udc *udc, int mask) |
| 451 | { |
| 452 | u32 udccr = udc_readl(udc, UDCCR); |
| 453 | udc_writel(udc, UDCCR, |
| 454 | (udccr & UDCCR_MASK_BITS) & ~(mask & UDCCR_MASK_BITS)); |
| 455 | } |
| 456 | |
| 457 | /** |
Robert Jarzmik | 367815e | 2009-04-21 20:41:03 -0700 | [diff] [blame] | 458 | * ep_write_UDCCSR - set bits in UDCCSR |
| 459 | * @udc: udc device |
| 460 | * @mask: bits to set in UDCCR |
| 461 | * |
| 462 | * Sets bits in UDCCSR (UDCCSR0 and UDCCSR*). |
| 463 | * |
| 464 | * A specific case is applied to ep0 : the ACM bit is always set to 1, for |
| 465 | * SET_INTERFACE and SET_CONFIGURATION. |
| 466 | */ |
| 467 | static inline void ep_write_UDCCSR(struct pxa_ep *ep, int mask) |
| 468 | { |
| 469 | if (is_ep0(ep)) |
| 470 | mask |= UDCCSR0_ACM; |
| 471 | udc_ep_writel(ep, UDCCSR, mask); |
| 472 | } |
| 473 | |
| 474 | /** |
Robert Jarzmik | d75379a | 2008-04-18 15:56:49 -0700 | [diff] [blame] | 475 | * ep_count_bytes_remain - get how many bytes in udc endpoint |
| 476 | * @ep: udc endpoint |
| 477 | * |
| 478 | * Returns number of bytes in OUT fifos. Broken for IN fifos (-EOPNOTSUPP) |
| 479 | */ |
| 480 | static int ep_count_bytes_remain(struct pxa_ep *ep) |
| 481 | { |
| 482 | if (ep->dir_in) |
| 483 | return -EOPNOTSUPP; |
| 484 | return udc_ep_readl(ep, UDCBCR) & 0x3ff; |
| 485 | } |
| 486 | |
| 487 | /** |
| 488 | * ep_is_empty - checks if ep has byte ready for reading |
| 489 | * @ep: udc endpoint |
| 490 | * |
| 491 | * If endpoint is the control endpoint, checks if there are bytes in the |
| 492 | * control endpoint fifo. If endpoint is a data endpoint, checks if bytes |
| 493 | * are ready for reading on OUT endpoint. |
| 494 | * |
| 495 | * Returns 0 if ep not empty, 1 if ep empty, -EOPNOTSUPP if IN endpoint |
| 496 | */ |
| 497 | static int ep_is_empty(struct pxa_ep *ep) |
| 498 | { |
| 499 | int ret; |
| 500 | |
| 501 | if (!is_ep0(ep) && ep->dir_in) |
| 502 | return -EOPNOTSUPP; |
| 503 | if (is_ep0(ep)) |
| 504 | ret = !(udc_ep_readl(ep, UDCCSR) & UDCCSR0_RNE); |
| 505 | else |
| 506 | ret = !(udc_ep_readl(ep, UDCCSR) & UDCCSR_BNE); |
| 507 | return ret; |
| 508 | } |
| 509 | |
| 510 | /** |
| 511 | * ep_is_full - checks if ep has place to write bytes |
| 512 | * @ep: udc endpoint |
| 513 | * |
| 514 | * If endpoint is not the control endpoint and is an IN endpoint, checks if |
| 515 | * there is place to write bytes into the endpoint. |
| 516 | * |
| 517 | * Returns 0 if ep not full, 1 if ep full, -EOPNOTSUPP if OUT endpoint |
| 518 | */ |
| 519 | static int ep_is_full(struct pxa_ep *ep) |
| 520 | { |
| 521 | if (is_ep0(ep)) |
| 522 | return (udc_ep_readl(ep, UDCCSR) & UDCCSR0_IPR); |
| 523 | if (!ep->dir_in) |
| 524 | return -EOPNOTSUPP; |
| 525 | return (!(udc_ep_readl(ep, UDCCSR) & UDCCSR_BNF)); |
| 526 | } |
| 527 | |
| 528 | /** |
| 529 | * epout_has_pkt - checks if OUT endpoint fifo has a packet available |
| 530 | * @ep: pxa endpoint |
| 531 | * |
| 532 | * Returns 1 if a complete packet is available, 0 if not, -EOPNOTSUPP for IN ep. |
| 533 | */ |
| 534 | static int epout_has_pkt(struct pxa_ep *ep) |
| 535 | { |
| 536 | if (!is_ep0(ep) && ep->dir_in) |
| 537 | return -EOPNOTSUPP; |
| 538 | if (is_ep0(ep)) |
| 539 | return (udc_ep_readl(ep, UDCCSR) & UDCCSR0_OPC); |
| 540 | return (udc_ep_readl(ep, UDCCSR) & UDCCSR_PC); |
| 541 | } |
| 542 | |
| 543 | /** |
| 544 | * set_ep0state - Set ep0 automata state |
| 545 | * @dev: udc device |
| 546 | * @state: state |
| 547 | */ |
| 548 | static void set_ep0state(struct pxa_udc *udc, int state) |
| 549 | { |
| 550 | struct pxa_ep *ep = &udc->pxa_ep[0]; |
| 551 | char *old_stname = EP0_STNAME(udc); |
| 552 | |
| 553 | udc->ep0state = state; |
| 554 | ep_dbg(ep, "state=%s->%s, udccsr0=0x%03x, udcbcr=%d\n", old_stname, |
| 555 | EP0_STNAME(udc), udc_ep_readl(ep, UDCCSR), |
| 556 | udc_ep_readl(ep, UDCBCR)); |
| 557 | } |
| 558 | |
| 559 | /** |
| 560 | * ep0_idle - Put control endpoint into idle state |
| 561 | * @dev: udc device |
| 562 | */ |
| 563 | static void ep0_idle(struct pxa_udc *dev) |
| 564 | { |
| 565 | set_ep0state(dev, WAIT_FOR_SETUP); |
| 566 | } |
| 567 | |
| 568 | /** |
| 569 | * inc_ep_stats_reqs - Update ep stats counts |
| 570 | * @ep: physical endpoint |
| 571 | * @req: usb request |
| 572 | * @is_in: ep direction (USB_DIR_IN or 0) |
| 573 | * |
| 574 | */ |
| 575 | static void inc_ep_stats_reqs(struct pxa_ep *ep, int is_in) |
| 576 | { |
| 577 | if (is_in) |
| 578 | ep->stats.in_ops++; |
| 579 | else |
| 580 | ep->stats.out_ops++; |
| 581 | } |
| 582 | |
| 583 | /** |
| 584 | * inc_ep_stats_bytes - Update ep stats counts |
| 585 | * @ep: physical endpoint |
Lucas De Marchi | 25985ed | 2011-03-30 22:57:33 -0300 | [diff] [blame] | 586 | * @count: bytes transferred on endpoint |
Robert Jarzmik | d75379a | 2008-04-18 15:56:49 -0700 | [diff] [blame] | 587 | * @is_in: ep direction (USB_DIR_IN or 0) |
| 588 | */ |
| 589 | static void inc_ep_stats_bytes(struct pxa_ep *ep, int count, int is_in) |
| 590 | { |
| 591 | if (is_in) |
| 592 | ep->stats.in_bytes += count; |
| 593 | else |
| 594 | ep->stats.out_bytes += count; |
| 595 | } |
| 596 | |
| 597 | /** |
| 598 | * pxa_ep_setup - Sets up an usb physical endpoint |
| 599 | * @ep: pxa27x physical endpoint |
| 600 | * |
| 601 | * Find the physical pxa27x ep, and setup its UDCCR |
| 602 | */ |
Felipe Balbi | 50757b2 | 2013-04-02 17:13:40 +0300 | [diff] [blame] | 603 | static void pxa_ep_setup(struct pxa_ep *ep) |
Robert Jarzmik | d75379a | 2008-04-18 15:56:49 -0700 | [diff] [blame] | 604 | { |
| 605 | u32 new_udccr; |
| 606 | |
| 607 | new_udccr = ((ep->config << UDCCONR_CN_S) & UDCCONR_CN) |
| 608 | | ((ep->interface << UDCCONR_IN_S) & UDCCONR_IN) |
| 609 | | ((ep->alternate << UDCCONR_AISN_S) & UDCCONR_AISN) |
| 610 | | ((EPADDR(ep) << UDCCONR_EN_S) & UDCCONR_EN) |
| 611 | | ((EPXFERTYPE(ep) << UDCCONR_ET_S) & UDCCONR_ET) |
| 612 | | ((ep->dir_in) ? UDCCONR_ED : 0) |
| 613 | | ((ep->fifo_size << UDCCONR_MPS_S) & UDCCONR_MPS) |
| 614 | | UDCCONR_EE; |
| 615 | |
| 616 | udc_ep_writel(ep, UDCCR, new_udccr); |
| 617 | } |
| 618 | |
| 619 | /** |
| 620 | * pxa_eps_setup - Sets up all usb physical endpoints |
| 621 | * @dev: udc device |
| 622 | * |
| 623 | * Setup all pxa physical endpoints, except ep0 |
| 624 | */ |
Felipe Balbi | 50757b2 | 2013-04-02 17:13:40 +0300 | [diff] [blame] | 625 | static void pxa_eps_setup(struct pxa_udc *dev) |
Robert Jarzmik | d75379a | 2008-04-18 15:56:49 -0700 | [diff] [blame] | 626 | { |
| 627 | unsigned int i; |
| 628 | |
| 629 | dev_dbg(dev->dev, "%s: dev=%p\n", __func__, dev); |
| 630 | |
| 631 | for (i = 1; i < NR_PXA_ENDPOINTS; i++) |
| 632 | pxa_ep_setup(&dev->pxa_ep[i]); |
| 633 | } |
| 634 | |
| 635 | /** |
| 636 | * pxa_ep_alloc_request - Allocate usb request |
| 637 | * @_ep: usb endpoint |
| 638 | * @gfp_flags: |
| 639 | * |
| 640 | * For the pxa27x, these can just wrap kmalloc/kfree. gadget drivers |
| 641 | * must still pass correctly initialized endpoints, since other controller |
| 642 | * drivers may care about how it's currently set up (dma issues etc). |
| 643 | */ |
| 644 | static struct usb_request * |
| 645 | pxa_ep_alloc_request(struct usb_ep *_ep, gfp_t gfp_flags) |
| 646 | { |
| 647 | struct pxa27x_request *req; |
| 648 | |
| 649 | req = kzalloc(sizeof *req, gfp_flags); |
Robert Jarzmik | 3131f7b | 2008-10-13 20:06:00 +0200 | [diff] [blame] | 650 | if (!req) |
Robert Jarzmik | d75379a | 2008-04-18 15:56:49 -0700 | [diff] [blame] | 651 | return NULL; |
| 652 | |
| 653 | INIT_LIST_HEAD(&req->queue); |
| 654 | req->in_use = 0; |
| 655 | req->udc_usb_ep = container_of(_ep, struct udc_usb_ep, usb_ep); |
| 656 | |
| 657 | return &req->req; |
| 658 | } |
| 659 | |
| 660 | /** |
| 661 | * pxa_ep_free_request - Free usb request |
| 662 | * @_ep: usb endpoint |
| 663 | * @_req: usb request |
| 664 | * |
| 665 | * Wrapper around kfree to free _req |
| 666 | */ |
| 667 | static void pxa_ep_free_request(struct usb_ep *_ep, struct usb_request *_req) |
| 668 | { |
| 669 | struct pxa27x_request *req; |
| 670 | |
| 671 | req = container_of(_req, struct pxa27x_request, req); |
| 672 | WARN_ON(!list_empty(&req->queue)); |
| 673 | kfree(req); |
| 674 | } |
| 675 | |
| 676 | /** |
| 677 | * ep_add_request - add a request to the endpoint's queue |
| 678 | * @ep: usb endpoint |
| 679 | * @req: usb request |
| 680 | * |
| 681 | * Context: ep->lock held |
| 682 | * |
| 683 | * Queues the request in the endpoint's queue, and enables the interrupts |
| 684 | * on the endpoint. |
| 685 | */ |
| 686 | static void ep_add_request(struct pxa_ep *ep, struct pxa27x_request *req) |
| 687 | { |
| 688 | if (unlikely(!req)) |
| 689 | return; |
| 690 | ep_vdbg(ep, "req:%p, lg=%d, udccsr=0x%03x\n", req, |
| 691 | req->req.length, udc_ep_readl(ep, UDCCSR)); |
| 692 | |
| 693 | req->in_use = 1; |
| 694 | list_add_tail(&req->queue, &ep->queue); |
| 695 | pio_irq_enable(ep); |
| 696 | } |
| 697 | |
| 698 | /** |
| 699 | * ep_del_request - removes a request from the endpoint's queue |
| 700 | * @ep: usb endpoint |
| 701 | * @req: usb request |
| 702 | * |
| 703 | * Context: ep->lock held |
| 704 | * |
| 705 | * Unqueue the request from the endpoint's queue. If there are no more requests |
| 706 | * on the endpoint, and if it's not the control endpoint, interrupts are |
| 707 | * disabled on the endpoint. |
| 708 | */ |
| 709 | static void ep_del_request(struct pxa_ep *ep, struct pxa27x_request *req) |
| 710 | { |
| 711 | if (unlikely(!req)) |
| 712 | return; |
| 713 | ep_vdbg(ep, "req:%p, lg=%d, udccsr=0x%03x\n", req, |
| 714 | req->req.length, udc_ep_readl(ep, UDCCSR)); |
| 715 | |
| 716 | list_del_init(&req->queue); |
| 717 | req->in_use = 0; |
| 718 | if (!is_ep0(ep) && list_empty(&ep->queue)) |
| 719 | pio_irq_disable(ep); |
| 720 | } |
| 721 | |
| 722 | /** |
| 723 | * req_done - Complete an usb request |
| 724 | * @ep: pxa physical endpoint |
| 725 | * @req: pxa request |
| 726 | * @status: usb request status sent to gadget API |
Robert Jarzmik | 5e23e90 | 2010-01-27 18:38:03 +0100 | [diff] [blame] | 727 | * @pflags: flags of previous spinlock_irq_save() or NULL if no lock held |
Robert Jarzmik | d75379a | 2008-04-18 15:56:49 -0700 | [diff] [blame] | 728 | * |
Robert Jarzmik | 5e23e90 | 2010-01-27 18:38:03 +0100 | [diff] [blame] | 729 | * Context: ep->lock held if flags not NULL, else ep->lock released |
Robert Jarzmik | d75379a | 2008-04-18 15:56:49 -0700 | [diff] [blame] | 730 | * |
| 731 | * Retire a pxa27x usb request. Endpoint must be locked. |
| 732 | */ |
Robert Jarzmik | 5e23e90 | 2010-01-27 18:38:03 +0100 | [diff] [blame] | 733 | static void req_done(struct pxa_ep *ep, struct pxa27x_request *req, int status, |
| 734 | unsigned long *pflags) |
Robert Jarzmik | d75379a | 2008-04-18 15:56:49 -0700 | [diff] [blame] | 735 | { |
Robert Jarzmik | 5e23e90 | 2010-01-27 18:38:03 +0100 | [diff] [blame] | 736 | unsigned long flags; |
| 737 | |
Robert Jarzmik | d75379a | 2008-04-18 15:56:49 -0700 | [diff] [blame] | 738 | ep_del_request(ep, req); |
| 739 | if (likely(req->req.status == -EINPROGRESS)) |
| 740 | req->req.status = status; |
| 741 | else |
| 742 | status = req->req.status; |
| 743 | |
| 744 | if (status && status != -ESHUTDOWN) |
| 745 | ep_dbg(ep, "complete req %p stat %d len %u/%u\n", |
| 746 | &req->req, status, |
| 747 | req->req.actual, req->req.length); |
| 748 | |
Robert Jarzmik | 5e23e90 | 2010-01-27 18:38:03 +0100 | [diff] [blame] | 749 | if (pflags) |
| 750 | spin_unlock_irqrestore(&ep->lock, *pflags); |
| 751 | local_irq_save(flags); |
Michal Sojka | 304f7e5 | 2014-09-24 22:43:19 +0200 | [diff] [blame] | 752 | usb_gadget_giveback_request(&req->udc_usb_ep->usb_ep, &req->req); |
Robert Jarzmik | 5e23e90 | 2010-01-27 18:38:03 +0100 | [diff] [blame] | 753 | local_irq_restore(flags); |
| 754 | if (pflags) |
| 755 | spin_lock_irqsave(&ep->lock, *pflags); |
Robert Jarzmik | d75379a | 2008-04-18 15:56:49 -0700 | [diff] [blame] | 756 | } |
| 757 | |
| 758 | /** |
Vernon Sauder | 4c24b6d | 2009-03-20 01:44:50 -0700 | [diff] [blame] | 759 | * ep_end_out_req - Ends endpoint OUT request |
Robert Jarzmik | d75379a | 2008-04-18 15:56:49 -0700 | [diff] [blame] | 760 | * @ep: physical endpoint |
| 761 | * @req: pxa request |
Robert Jarzmik | 5e23e90 | 2010-01-27 18:38:03 +0100 | [diff] [blame] | 762 | * @pflags: flags of previous spinlock_irq_save() or NULL if no lock held |
Robert Jarzmik | d75379a | 2008-04-18 15:56:49 -0700 | [diff] [blame] | 763 | * |
Robert Jarzmik | 5e23e90 | 2010-01-27 18:38:03 +0100 | [diff] [blame] | 764 | * Context: ep->lock held or released (see req_done()) |
Robert Jarzmik | d75379a | 2008-04-18 15:56:49 -0700 | [diff] [blame] | 765 | * |
Vernon Sauder | 4c24b6d | 2009-03-20 01:44:50 -0700 | [diff] [blame] | 766 | * Ends endpoint OUT request (completes usb request). |
Robert Jarzmik | d75379a | 2008-04-18 15:56:49 -0700 | [diff] [blame] | 767 | */ |
Robert Jarzmik | 5e23e90 | 2010-01-27 18:38:03 +0100 | [diff] [blame] | 768 | static void ep_end_out_req(struct pxa_ep *ep, struct pxa27x_request *req, |
| 769 | unsigned long *pflags) |
Robert Jarzmik | d75379a | 2008-04-18 15:56:49 -0700 | [diff] [blame] | 770 | { |
| 771 | inc_ep_stats_reqs(ep, !USB_DIR_IN); |
Robert Jarzmik | 5e23e90 | 2010-01-27 18:38:03 +0100 | [diff] [blame] | 772 | req_done(ep, req, 0, pflags); |
Robert Jarzmik | d75379a | 2008-04-18 15:56:49 -0700 | [diff] [blame] | 773 | } |
| 774 | |
| 775 | /** |
Vernon Sauder | 4c24b6d | 2009-03-20 01:44:50 -0700 | [diff] [blame] | 776 | * ep0_end_out_req - Ends control endpoint OUT request (ends data stage) |
Robert Jarzmik | d75379a | 2008-04-18 15:56:49 -0700 | [diff] [blame] | 777 | * @ep: physical endpoint |
| 778 | * @req: pxa request |
Robert Jarzmik | 5e23e90 | 2010-01-27 18:38:03 +0100 | [diff] [blame] | 779 | * @pflags: flags of previous spinlock_irq_save() or NULL if no lock held |
Robert Jarzmik | d75379a | 2008-04-18 15:56:49 -0700 | [diff] [blame] | 780 | * |
Robert Jarzmik | 5e23e90 | 2010-01-27 18:38:03 +0100 | [diff] [blame] | 781 | * Context: ep->lock held or released (see req_done()) |
Robert Jarzmik | d75379a | 2008-04-18 15:56:49 -0700 | [diff] [blame] | 782 | * |
Vernon Sauder | 4c24b6d | 2009-03-20 01:44:50 -0700 | [diff] [blame] | 783 | * Ends control endpoint OUT request (completes usb request), and puts |
Robert Jarzmik | d75379a | 2008-04-18 15:56:49 -0700 | [diff] [blame] | 784 | * control endpoint into idle state |
| 785 | */ |
Robert Jarzmik | 5e23e90 | 2010-01-27 18:38:03 +0100 | [diff] [blame] | 786 | static void ep0_end_out_req(struct pxa_ep *ep, struct pxa27x_request *req, |
| 787 | unsigned long *pflags) |
Robert Jarzmik | d75379a | 2008-04-18 15:56:49 -0700 | [diff] [blame] | 788 | { |
| 789 | set_ep0state(ep->dev, OUT_STATUS_STAGE); |
Robert Jarzmik | 5e23e90 | 2010-01-27 18:38:03 +0100 | [diff] [blame] | 790 | ep_end_out_req(ep, req, pflags); |
Robert Jarzmik | d75379a | 2008-04-18 15:56:49 -0700 | [diff] [blame] | 791 | ep0_idle(ep->dev); |
| 792 | } |
| 793 | |
| 794 | /** |
Vernon Sauder | 4c24b6d | 2009-03-20 01:44:50 -0700 | [diff] [blame] | 795 | * ep_end_in_req - Ends endpoint IN request |
Robert Jarzmik | d75379a | 2008-04-18 15:56:49 -0700 | [diff] [blame] | 796 | * @ep: physical endpoint |
| 797 | * @req: pxa request |
Robert Jarzmik | 5e23e90 | 2010-01-27 18:38:03 +0100 | [diff] [blame] | 798 | * @pflags: flags of previous spinlock_irq_save() or NULL if no lock held |
Robert Jarzmik | d75379a | 2008-04-18 15:56:49 -0700 | [diff] [blame] | 799 | * |
Robert Jarzmik | 5e23e90 | 2010-01-27 18:38:03 +0100 | [diff] [blame] | 800 | * Context: ep->lock held or released (see req_done()) |
Robert Jarzmik | d75379a | 2008-04-18 15:56:49 -0700 | [diff] [blame] | 801 | * |
Vernon Sauder | 4c24b6d | 2009-03-20 01:44:50 -0700 | [diff] [blame] | 802 | * Ends endpoint IN request (completes usb request). |
Robert Jarzmik | d75379a | 2008-04-18 15:56:49 -0700 | [diff] [blame] | 803 | */ |
Robert Jarzmik | 5e23e90 | 2010-01-27 18:38:03 +0100 | [diff] [blame] | 804 | static void ep_end_in_req(struct pxa_ep *ep, struct pxa27x_request *req, |
| 805 | unsigned long *pflags) |
Robert Jarzmik | d75379a | 2008-04-18 15:56:49 -0700 | [diff] [blame] | 806 | { |
| 807 | inc_ep_stats_reqs(ep, USB_DIR_IN); |
Robert Jarzmik | 5e23e90 | 2010-01-27 18:38:03 +0100 | [diff] [blame] | 808 | req_done(ep, req, 0, pflags); |
Robert Jarzmik | d75379a | 2008-04-18 15:56:49 -0700 | [diff] [blame] | 809 | } |
| 810 | |
| 811 | /** |
Vernon Sauder | 4c24b6d | 2009-03-20 01:44:50 -0700 | [diff] [blame] | 812 | * ep0_end_in_req - Ends control endpoint IN request (ends data stage) |
Robert Jarzmik | d75379a | 2008-04-18 15:56:49 -0700 | [diff] [blame] | 813 | * @ep: physical endpoint |
| 814 | * @req: pxa request |
Robert Jarzmik | 5e23e90 | 2010-01-27 18:38:03 +0100 | [diff] [blame] | 815 | * @pflags: flags of previous spinlock_irq_save() or NULL if no lock held |
Robert Jarzmik | d75379a | 2008-04-18 15:56:49 -0700 | [diff] [blame] | 816 | * |
Robert Jarzmik | 5e23e90 | 2010-01-27 18:38:03 +0100 | [diff] [blame] | 817 | * Context: ep->lock held or released (see req_done()) |
Robert Jarzmik | d75379a | 2008-04-18 15:56:49 -0700 | [diff] [blame] | 818 | * |
Vernon Sauder | 4c24b6d | 2009-03-20 01:44:50 -0700 | [diff] [blame] | 819 | * Ends control endpoint IN request (completes usb request), and puts |
Robert Jarzmik | d75379a | 2008-04-18 15:56:49 -0700 | [diff] [blame] | 820 | * control endpoint into status state |
| 821 | */ |
Robert Jarzmik | 5e23e90 | 2010-01-27 18:38:03 +0100 | [diff] [blame] | 822 | static void ep0_end_in_req(struct pxa_ep *ep, struct pxa27x_request *req, |
| 823 | unsigned long *pflags) |
Robert Jarzmik | d75379a | 2008-04-18 15:56:49 -0700 | [diff] [blame] | 824 | { |
Vernon Sauder | 4c24b6d | 2009-03-20 01:44:50 -0700 | [diff] [blame] | 825 | set_ep0state(ep->dev, IN_STATUS_STAGE); |
Robert Jarzmik | 5e23e90 | 2010-01-27 18:38:03 +0100 | [diff] [blame] | 826 | ep_end_in_req(ep, req, pflags); |
Robert Jarzmik | d75379a | 2008-04-18 15:56:49 -0700 | [diff] [blame] | 827 | } |
| 828 | |
| 829 | /** |
| 830 | * nuke - Dequeue all requests |
| 831 | * @ep: pxa endpoint |
| 832 | * @status: usb request status |
| 833 | * |
Robert Jarzmik | 5e23e90 | 2010-01-27 18:38:03 +0100 | [diff] [blame] | 834 | * Context: ep->lock released |
Robert Jarzmik | d75379a | 2008-04-18 15:56:49 -0700 | [diff] [blame] | 835 | * |
| 836 | * Dequeues all requests on an endpoint. As a side effect, interrupts will be |
| 837 | * disabled on that endpoint (because no more requests). |
| 838 | */ |
| 839 | static void nuke(struct pxa_ep *ep, int status) |
| 840 | { |
Robert Jarzmik | 5e23e90 | 2010-01-27 18:38:03 +0100 | [diff] [blame] | 841 | struct pxa27x_request *req; |
| 842 | unsigned long flags; |
Robert Jarzmik | d75379a | 2008-04-18 15:56:49 -0700 | [diff] [blame] | 843 | |
Robert Jarzmik | 5e23e90 | 2010-01-27 18:38:03 +0100 | [diff] [blame] | 844 | spin_lock_irqsave(&ep->lock, flags); |
Robert Jarzmik | d75379a | 2008-04-18 15:56:49 -0700 | [diff] [blame] | 845 | while (!list_empty(&ep->queue)) { |
| 846 | req = list_entry(ep->queue.next, struct pxa27x_request, queue); |
Robert Jarzmik | 5e23e90 | 2010-01-27 18:38:03 +0100 | [diff] [blame] | 847 | req_done(ep, req, status, &flags); |
Robert Jarzmik | d75379a | 2008-04-18 15:56:49 -0700 | [diff] [blame] | 848 | } |
Robert Jarzmik | 5e23e90 | 2010-01-27 18:38:03 +0100 | [diff] [blame] | 849 | spin_unlock_irqrestore(&ep->lock, flags); |
Robert Jarzmik | d75379a | 2008-04-18 15:56:49 -0700 | [diff] [blame] | 850 | } |
| 851 | |
| 852 | /** |
| 853 | * read_packet - transfer 1 packet from an OUT endpoint into request |
| 854 | * @ep: pxa physical endpoint |
| 855 | * @req: usb request |
| 856 | * |
| 857 | * Takes bytes from OUT endpoint and transfers them info the usb request. |
| 858 | * If there is less space in request than bytes received in OUT endpoint, |
| 859 | * bytes are left in the OUT endpoint. |
| 860 | * |
Lucas De Marchi | 25985ed | 2011-03-30 22:57:33 -0300 | [diff] [blame] | 861 | * Returns how many bytes were actually transferred |
Robert Jarzmik | d75379a | 2008-04-18 15:56:49 -0700 | [diff] [blame] | 862 | */ |
| 863 | static int read_packet(struct pxa_ep *ep, struct pxa27x_request *req) |
| 864 | { |
| 865 | u32 *buf; |
| 866 | int bytes_ep, bufferspace, count, i; |
| 867 | |
| 868 | bytes_ep = ep_count_bytes_remain(ep); |
| 869 | bufferspace = req->req.length - req->req.actual; |
| 870 | |
| 871 | buf = (u32 *)(req->req.buf + req->req.actual); |
| 872 | prefetchw(buf); |
| 873 | |
| 874 | if (likely(!ep_is_empty(ep))) |
| 875 | count = min(bytes_ep, bufferspace); |
| 876 | else /* zlp */ |
| 877 | count = 0; |
| 878 | |
| 879 | for (i = count; i > 0; i -= 4) |
| 880 | *buf++ = udc_ep_readl(ep, UDCDR); |
| 881 | req->req.actual += count; |
| 882 | |
Robert Jarzmik | 367815e | 2009-04-21 20:41:03 -0700 | [diff] [blame] | 883 | ep_write_UDCCSR(ep, UDCCSR_PC); |
Robert Jarzmik | d75379a | 2008-04-18 15:56:49 -0700 | [diff] [blame] | 884 | |
| 885 | return count; |
| 886 | } |
| 887 | |
| 888 | /** |
| 889 | * write_packet - transfer 1 packet from request into an IN endpoint |
| 890 | * @ep: pxa physical endpoint |
| 891 | * @req: usb request |
| 892 | * @max: max bytes that fit into endpoint |
| 893 | * |
| 894 | * Takes bytes from usb request, and transfers them into the physical |
| 895 | * endpoint. If there are no bytes to transfer, doesn't write anything |
| 896 | * to physical endpoint. |
| 897 | * |
Lucas De Marchi | 25985ed | 2011-03-30 22:57:33 -0300 | [diff] [blame] | 898 | * Returns how many bytes were actually transferred. |
Robert Jarzmik | d75379a | 2008-04-18 15:56:49 -0700 | [diff] [blame] | 899 | */ |
| 900 | static int write_packet(struct pxa_ep *ep, struct pxa27x_request *req, |
| 901 | unsigned int max) |
| 902 | { |
| 903 | int length, count, remain, i; |
| 904 | u32 *buf; |
| 905 | u8 *buf_8; |
| 906 | |
| 907 | buf = (u32 *)(req->req.buf + req->req.actual); |
| 908 | prefetch(buf); |
| 909 | |
| 910 | length = min(req->req.length - req->req.actual, max); |
| 911 | req->req.actual += length; |
| 912 | |
| 913 | remain = length & 0x3; |
| 914 | count = length & ~(0x3); |
| 915 | for (i = count; i > 0 ; i -= 4) |
| 916 | udc_ep_writel(ep, UDCDR, *buf++); |
| 917 | |
| 918 | buf_8 = (u8 *)buf; |
| 919 | for (i = remain; i > 0; i--) |
| 920 | udc_ep_writeb(ep, UDCDR, *buf_8++); |
| 921 | |
| 922 | ep_vdbg(ep, "length=%d+%d, udccsr=0x%03x\n", count, remain, |
| 923 | udc_ep_readl(ep, UDCCSR)); |
| 924 | |
| 925 | return length; |
| 926 | } |
| 927 | |
| 928 | /** |
| 929 | * read_fifo - Transfer packets from OUT endpoint into usb request |
| 930 | * @ep: pxa physical endpoint |
| 931 | * @req: usb request |
| 932 | * |
| 933 | * Context: callable when in_interrupt() |
| 934 | * |
| 935 | * Unload as many packets as possible from the fifo we use for usb OUT |
| 936 | * transfers and put them into the request. Caller should have made sure |
| 937 | * there's at least one packet ready. |
| 938 | * Doesn't complete the request, that's the caller's job |
| 939 | * |
| 940 | * Returns 1 if the request completed, 0 otherwise |
| 941 | */ |
| 942 | static int read_fifo(struct pxa_ep *ep, struct pxa27x_request *req) |
| 943 | { |
| 944 | int count, is_short, completed = 0; |
| 945 | |
| 946 | while (epout_has_pkt(ep)) { |
| 947 | count = read_packet(ep, req); |
| 948 | inc_ep_stats_bytes(ep, count, !USB_DIR_IN); |
| 949 | |
| 950 | is_short = (count < ep->fifo_size); |
| 951 | ep_dbg(ep, "read udccsr:%03x, count:%d bytes%s req %p %d/%d\n", |
| 952 | udc_ep_readl(ep, UDCCSR), count, is_short ? "/S" : "", |
| 953 | &req->req, req->req.actual, req->req.length); |
| 954 | |
| 955 | /* completion */ |
| 956 | if (is_short || req->req.actual == req->req.length) { |
| 957 | completed = 1; |
| 958 | break; |
| 959 | } |
| 960 | /* finished that packet. the next one may be waiting... */ |
| 961 | } |
| 962 | return completed; |
| 963 | } |
| 964 | |
| 965 | /** |
| 966 | * write_fifo - transfer packets from usb request into an IN endpoint |
| 967 | * @ep: pxa physical endpoint |
| 968 | * @req: pxa usb request |
| 969 | * |
| 970 | * Write to an IN endpoint fifo, as many packets as possible. |
| 971 | * irqs will use this to write the rest later. |
| 972 | * caller guarantees at least one packet buffer is ready (or a zlp). |
| 973 | * Doesn't complete the request, that's the caller's job |
| 974 | * |
Lucas De Marchi | 25985ed | 2011-03-30 22:57:33 -0300 | [diff] [blame] | 975 | * Returns 1 if request fully transferred, 0 if partial transfer |
Robert Jarzmik | d75379a | 2008-04-18 15:56:49 -0700 | [diff] [blame] | 976 | */ |
| 977 | static int write_fifo(struct pxa_ep *ep, struct pxa27x_request *req) |
| 978 | { |
| 979 | unsigned max; |
| 980 | int count, is_short, is_last = 0, completed = 0, totcount = 0; |
| 981 | u32 udccsr; |
| 982 | |
| 983 | max = ep->fifo_size; |
| 984 | do { |
| 985 | is_short = 0; |
| 986 | |
| 987 | udccsr = udc_ep_readl(ep, UDCCSR); |
| 988 | if (udccsr & UDCCSR_PC) { |
| 989 | ep_vdbg(ep, "Clearing Transmit Complete, udccsr=%x\n", |
| 990 | udccsr); |
Robert Jarzmik | 367815e | 2009-04-21 20:41:03 -0700 | [diff] [blame] | 991 | ep_write_UDCCSR(ep, UDCCSR_PC); |
Robert Jarzmik | d75379a | 2008-04-18 15:56:49 -0700 | [diff] [blame] | 992 | } |
| 993 | if (udccsr & UDCCSR_TRN) { |
| 994 | ep_vdbg(ep, "Clearing Underrun on, udccsr=%x\n", |
| 995 | udccsr); |
Robert Jarzmik | 367815e | 2009-04-21 20:41:03 -0700 | [diff] [blame] | 996 | ep_write_UDCCSR(ep, UDCCSR_TRN); |
Robert Jarzmik | d75379a | 2008-04-18 15:56:49 -0700 | [diff] [blame] | 997 | } |
| 998 | |
| 999 | count = write_packet(ep, req, max); |
| 1000 | inc_ep_stats_bytes(ep, count, USB_DIR_IN); |
| 1001 | totcount += count; |
| 1002 | |
| 1003 | /* last packet is usually short (or a zlp) */ |
| 1004 | if (unlikely(count < max)) { |
| 1005 | is_last = 1; |
| 1006 | is_short = 1; |
| 1007 | } else { |
| 1008 | if (likely(req->req.length > req->req.actual) |
| 1009 | || req->req.zero) |
| 1010 | is_last = 0; |
| 1011 | else |
| 1012 | is_last = 1; |
| 1013 | /* interrupt/iso maxpacket may not fill the fifo */ |
| 1014 | is_short = unlikely(max < ep->fifo_size); |
| 1015 | } |
| 1016 | |
| 1017 | if (is_short) |
Robert Jarzmik | 367815e | 2009-04-21 20:41:03 -0700 | [diff] [blame] | 1018 | ep_write_UDCCSR(ep, UDCCSR_SP); |
Robert Jarzmik | d75379a | 2008-04-18 15:56:49 -0700 | [diff] [blame] | 1019 | |
| 1020 | /* requests complete when all IN data is in the FIFO */ |
| 1021 | if (is_last) { |
| 1022 | completed = 1; |
| 1023 | break; |
| 1024 | } |
| 1025 | } while (!ep_is_full(ep)); |
| 1026 | |
| 1027 | ep_dbg(ep, "wrote count:%d bytes%s%s, left:%d req=%p\n", |
| 1028 | totcount, is_last ? "/L" : "", is_short ? "/S" : "", |
| 1029 | req->req.length - req->req.actual, &req->req); |
| 1030 | |
| 1031 | return completed; |
| 1032 | } |
| 1033 | |
| 1034 | /** |
| 1035 | * read_ep0_fifo - Transfer packets from control endpoint into usb request |
| 1036 | * @ep: control endpoint |
| 1037 | * @req: pxa usb request |
| 1038 | * |
| 1039 | * Special ep0 version of the above read_fifo. Reads as many bytes from control |
| 1040 | * endpoint as can be read, and stores them into usb request (limited by request |
| 1041 | * maximum length). |
| 1042 | * |
| 1043 | * Returns 0 if usb request only partially filled, 1 if fully filled |
| 1044 | */ |
| 1045 | static int read_ep0_fifo(struct pxa_ep *ep, struct pxa27x_request *req) |
| 1046 | { |
| 1047 | int count, is_short, completed = 0; |
| 1048 | |
| 1049 | while (epout_has_pkt(ep)) { |
| 1050 | count = read_packet(ep, req); |
Robert Jarzmik | 367815e | 2009-04-21 20:41:03 -0700 | [diff] [blame] | 1051 | ep_write_UDCCSR(ep, UDCCSR0_OPC); |
Robert Jarzmik | d75379a | 2008-04-18 15:56:49 -0700 | [diff] [blame] | 1052 | inc_ep_stats_bytes(ep, count, !USB_DIR_IN); |
| 1053 | |
| 1054 | is_short = (count < ep->fifo_size); |
| 1055 | ep_dbg(ep, "read udccsr:%03x, count:%d bytes%s req %p %d/%d\n", |
| 1056 | udc_ep_readl(ep, UDCCSR), count, is_short ? "/S" : "", |
| 1057 | &req->req, req->req.actual, req->req.length); |
| 1058 | |
| 1059 | if (is_short || req->req.actual >= req->req.length) { |
| 1060 | completed = 1; |
| 1061 | break; |
| 1062 | } |
| 1063 | } |
| 1064 | |
| 1065 | return completed; |
| 1066 | } |
| 1067 | |
| 1068 | /** |
| 1069 | * write_ep0_fifo - Send a request to control endpoint (ep0 in) |
| 1070 | * @ep: control endpoint |
| 1071 | * @req: request |
| 1072 | * |
| 1073 | * Context: callable when in_interrupt() |
| 1074 | * |
| 1075 | * Sends a request (or a part of the request) to the control endpoint (ep0 in). |
| 1076 | * If the request doesn't fit, the remaining part will be sent from irq. |
| 1077 | * The request is considered fully written only if either : |
Lucas De Marchi | 25985ed | 2011-03-30 22:57:33 -0300 | [diff] [blame] | 1078 | * - last write transferred all remaining bytes, but fifo was not fully filled |
Robert Jarzmik | d75379a | 2008-04-18 15:56:49 -0700 | [diff] [blame] | 1079 | * - last write was a 0 length write |
| 1080 | * |
| 1081 | * Returns 1 if request fully written, 0 if request only partially sent |
| 1082 | */ |
| 1083 | static int write_ep0_fifo(struct pxa_ep *ep, struct pxa27x_request *req) |
| 1084 | { |
| 1085 | unsigned count; |
| 1086 | int is_last, is_short; |
| 1087 | |
| 1088 | count = write_packet(ep, req, EP0_FIFO_SIZE); |
| 1089 | inc_ep_stats_bytes(ep, count, USB_DIR_IN); |
| 1090 | |
| 1091 | is_short = (count < EP0_FIFO_SIZE); |
| 1092 | is_last = ((count == 0) || (count < EP0_FIFO_SIZE)); |
| 1093 | |
| 1094 | /* Sends either a short packet or a 0 length packet */ |
| 1095 | if (unlikely(is_short)) |
Robert Jarzmik | 367815e | 2009-04-21 20:41:03 -0700 | [diff] [blame] | 1096 | ep_write_UDCCSR(ep, UDCCSR0_IPR); |
Robert Jarzmik | d75379a | 2008-04-18 15:56:49 -0700 | [diff] [blame] | 1097 | |
| 1098 | ep_dbg(ep, "in %d bytes%s%s, %d left, req=%p, udccsr0=0x%03x\n", |
| 1099 | count, is_short ? "/S" : "", is_last ? "/L" : "", |
| 1100 | req->req.length - req->req.actual, |
| 1101 | &req->req, udc_ep_readl(ep, UDCCSR)); |
| 1102 | |
| 1103 | return is_last; |
| 1104 | } |
| 1105 | |
| 1106 | /** |
| 1107 | * pxa_ep_queue - Queue a request into an IN endpoint |
| 1108 | * @_ep: usb endpoint |
| 1109 | * @_req: usb request |
| 1110 | * @gfp_flags: flags |
| 1111 | * |
| 1112 | * Context: normally called when !in_interrupt, but callable when in_interrupt() |
| 1113 | * in the special case of ep0 setup : |
| 1114 | * (irq->handle_ep0_ctrl_req->gadget_setup->pxa_ep_queue) |
| 1115 | * |
| 1116 | * Returns 0 if succedeed, error otherwise |
| 1117 | */ |
| 1118 | static int pxa_ep_queue(struct usb_ep *_ep, struct usb_request *_req, |
| 1119 | gfp_t gfp_flags) |
| 1120 | { |
| 1121 | struct udc_usb_ep *udc_usb_ep; |
| 1122 | struct pxa_ep *ep; |
| 1123 | struct pxa27x_request *req; |
| 1124 | struct pxa_udc *dev; |
| 1125 | unsigned long flags; |
| 1126 | int rc = 0; |
| 1127 | int is_first_req; |
| 1128 | unsigned length; |
Robert Jarzmik | 5e23e90 | 2010-01-27 18:38:03 +0100 | [diff] [blame] | 1129 | int recursion_detected; |
Robert Jarzmik | d75379a | 2008-04-18 15:56:49 -0700 | [diff] [blame] | 1130 | |
| 1131 | req = container_of(_req, struct pxa27x_request, req); |
| 1132 | udc_usb_ep = container_of(_ep, struct udc_usb_ep, usb_ep); |
| 1133 | |
| 1134 | if (unlikely(!_req || !_req->complete || !_req->buf)) |
| 1135 | return -EINVAL; |
| 1136 | |
| 1137 | if (unlikely(!_ep)) |
| 1138 | return -EINVAL; |
| 1139 | |
| 1140 | dev = udc_usb_ep->dev; |
| 1141 | ep = udc_usb_ep->pxa_ep; |
| 1142 | if (unlikely(!ep)) |
| 1143 | return -EINVAL; |
| 1144 | |
| 1145 | dev = ep->dev; |
| 1146 | if (unlikely(!dev->driver || dev->gadget.speed == USB_SPEED_UNKNOWN)) { |
| 1147 | ep_dbg(ep, "bogus device state\n"); |
| 1148 | return -ESHUTDOWN; |
| 1149 | } |
| 1150 | |
| 1151 | /* iso is always one packet per request, that's the only way |
| 1152 | * we can report per-packet status. that also helps with dma. |
| 1153 | */ |
| 1154 | if (unlikely(EPXFERTYPE_is_ISO(ep) |
| 1155 | && req->req.length > ep->fifo_size)) |
| 1156 | return -EMSGSIZE; |
| 1157 | |
| 1158 | spin_lock_irqsave(&ep->lock, flags); |
Robert Jarzmik | 5e23e90 | 2010-01-27 18:38:03 +0100 | [diff] [blame] | 1159 | recursion_detected = ep->in_handle_ep; |
Robert Jarzmik | d75379a | 2008-04-18 15:56:49 -0700 | [diff] [blame] | 1160 | |
| 1161 | is_first_req = list_empty(&ep->queue); |
| 1162 | ep_dbg(ep, "queue req %p(first=%s), len %d buf %p\n", |
| 1163 | _req, is_first_req ? "yes" : "no", |
| 1164 | _req->length, _req->buf); |
| 1165 | |
| 1166 | if (!ep->enabled) { |
| 1167 | _req->status = -ESHUTDOWN; |
| 1168 | rc = -ESHUTDOWN; |
Robert Jarzmik | 5e23e90 | 2010-01-27 18:38:03 +0100 | [diff] [blame] | 1169 | goto out_locked; |
Robert Jarzmik | d75379a | 2008-04-18 15:56:49 -0700 | [diff] [blame] | 1170 | } |
| 1171 | |
| 1172 | if (req->in_use) { |
| 1173 | ep_err(ep, "refusing to queue req %p (already queued)\n", req); |
Robert Jarzmik | 5e23e90 | 2010-01-27 18:38:03 +0100 | [diff] [blame] | 1174 | goto out_locked; |
Robert Jarzmik | d75379a | 2008-04-18 15:56:49 -0700 | [diff] [blame] | 1175 | } |
| 1176 | |
| 1177 | length = _req->length; |
| 1178 | _req->status = -EINPROGRESS; |
| 1179 | _req->actual = 0; |
| 1180 | |
| 1181 | ep_add_request(ep, req); |
Robert Jarzmik | 5e23e90 | 2010-01-27 18:38:03 +0100 | [diff] [blame] | 1182 | spin_unlock_irqrestore(&ep->lock, flags); |
Robert Jarzmik | d75379a | 2008-04-18 15:56:49 -0700 | [diff] [blame] | 1183 | |
| 1184 | if (is_ep0(ep)) { |
| 1185 | switch (dev->ep0state) { |
| 1186 | case WAIT_ACK_SET_CONF_INTERF: |
| 1187 | if (length == 0) { |
Robert Jarzmik | 5e23e90 | 2010-01-27 18:38:03 +0100 | [diff] [blame] | 1188 | ep_end_in_req(ep, req, NULL); |
Robert Jarzmik | d75379a | 2008-04-18 15:56:49 -0700 | [diff] [blame] | 1189 | } else { |
| 1190 | ep_err(ep, "got a request of %d bytes while" |
Vernon Sauder | 4c24b6d | 2009-03-20 01:44:50 -0700 | [diff] [blame] | 1191 | "in state WAIT_ACK_SET_CONF_INTERF\n", |
Robert Jarzmik | d75379a | 2008-04-18 15:56:49 -0700 | [diff] [blame] | 1192 | length); |
| 1193 | ep_del_request(ep, req); |
| 1194 | rc = -EL2HLT; |
| 1195 | } |
| 1196 | ep0_idle(ep->dev); |
| 1197 | break; |
| 1198 | case IN_DATA_STAGE: |
| 1199 | if (!ep_is_full(ep)) |
| 1200 | if (write_ep0_fifo(ep, req)) |
Robert Jarzmik | 5e23e90 | 2010-01-27 18:38:03 +0100 | [diff] [blame] | 1201 | ep0_end_in_req(ep, req, NULL); |
Robert Jarzmik | d75379a | 2008-04-18 15:56:49 -0700 | [diff] [blame] | 1202 | break; |
| 1203 | case OUT_DATA_STAGE: |
| 1204 | if ((length == 0) || !epout_has_pkt(ep)) |
| 1205 | if (read_ep0_fifo(ep, req)) |
Robert Jarzmik | 5e23e90 | 2010-01-27 18:38:03 +0100 | [diff] [blame] | 1206 | ep0_end_out_req(ep, req, NULL); |
Robert Jarzmik | d75379a | 2008-04-18 15:56:49 -0700 | [diff] [blame] | 1207 | break; |
| 1208 | default: |
| 1209 | ep_err(ep, "odd state %s to send me a request\n", |
| 1210 | EP0_STNAME(ep->dev)); |
| 1211 | ep_del_request(ep, req); |
| 1212 | rc = -EL2HLT; |
| 1213 | break; |
| 1214 | } |
| 1215 | } else { |
Robert Jarzmik | 5e23e90 | 2010-01-27 18:38:03 +0100 | [diff] [blame] | 1216 | if (!recursion_detected) |
| 1217 | handle_ep(ep); |
Robert Jarzmik | d75379a | 2008-04-18 15:56:49 -0700 | [diff] [blame] | 1218 | } |
| 1219 | |
| 1220 | out: |
Robert Jarzmik | d75379a | 2008-04-18 15:56:49 -0700 | [diff] [blame] | 1221 | return rc; |
Robert Jarzmik | 5e23e90 | 2010-01-27 18:38:03 +0100 | [diff] [blame] | 1222 | out_locked: |
| 1223 | spin_unlock_irqrestore(&ep->lock, flags); |
| 1224 | goto out; |
Robert Jarzmik | d75379a | 2008-04-18 15:56:49 -0700 | [diff] [blame] | 1225 | } |
| 1226 | |
| 1227 | /** |
| 1228 | * pxa_ep_dequeue - Dequeue one request |
| 1229 | * @_ep: usb endpoint |
| 1230 | * @_req: usb request |
| 1231 | * |
| 1232 | * Return 0 if no error, -EINVAL or -ECONNRESET otherwise |
| 1233 | */ |
| 1234 | static int pxa_ep_dequeue(struct usb_ep *_ep, struct usb_request *_req) |
| 1235 | { |
| 1236 | struct pxa_ep *ep; |
| 1237 | struct udc_usb_ep *udc_usb_ep; |
| 1238 | struct pxa27x_request *req; |
| 1239 | unsigned long flags; |
Vernon Sauder | 4c24b6d | 2009-03-20 01:44:50 -0700 | [diff] [blame] | 1240 | int rc = -EINVAL; |
Robert Jarzmik | d75379a | 2008-04-18 15:56:49 -0700 | [diff] [blame] | 1241 | |
| 1242 | if (!_ep) |
Vernon Sauder | 4c24b6d | 2009-03-20 01:44:50 -0700 | [diff] [blame] | 1243 | return rc; |
Robert Jarzmik | d75379a | 2008-04-18 15:56:49 -0700 | [diff] [blame] | 1244 | udc_usb_ep = container_of(_ep, struct udc_usb_ep, usb_ep); |
| 1245 | ep = udc_usb_ep->pxa_ep; |
| 1246 | if (!ep || is_ep0(ep)) |
Vernon Sauder | 4c24b6d | 2009-03-20 01:44:50 -0700 | [diff] [blame] | 1247 | return rc; |
Robert Jarzmik | d75379a | 2008-04-18 15:56:49 -0700 | [diff] [blame] | 1248 | |
| 1249 | spin_lock_irqsave(&ep->lock, flags); |
| 1250 | |
| 1251 | /* make sure it's actually queued on this endpoint */ |
| 1252 | list_for_each_entry(req, &ep->queue, queue) { |
Vernon Sauder | 4c24b6d | 2009-03-20 01:44:50 -0700 | [diff] [blame] | 1253 | if (&req->req == _req) { |
Vernon Sauder | 4c24b6d | 2009-03-20 01:44:50 -0700 | [diff] [blame] | 1254 | rc = 0; |
Robert Jarzmik | d75379a | 2008-04-18 15:56:49 -0700 | [diff] [blame] | 1255 | break; |
Vernon Sauder | 4c24b6d | 2009-03-20 01:44:50 -0700 | [diff] [blame] | 1256 | } |
Robert Jarzmik | d75379a | 2008-04-18 15:56:49 -0700 | [diff] [blame] | 1257 | } |
| 1258 | |
Robert Jarzmik | d75379a | 2008-04-18 15:56:49 -0700 | [diff] [blame] | 1259 | spin_unlock_irqrestore(&ep->lock, flags); |
Robert Jarzmik | 5e23e90 | 2010-01-27 18:38:03 +0100 | [diff] [blame] | 1260 | if (!rc) |
| 1261 | req_done(ep, req, -ECONNRESET, NULL); |
Robert Jarzmik | d75379a | 2008-04-18 15:56:49 -0700 | [diff] [blame] | 1262 | return rc; |
| 1263 | } |
| 1264 | |
| 1265 | /** |
| 1266 | * pxa_ep_set_halt - Halts operations on one endpoint |
| 1267 | * @_ep: usb endpoint |
| 1268 | * @value: |
| 1269 | * |
| 1270 | * Returns 0 if no error, -EINVAL, -EROFS, -EAGAIN otherwise |
| 1271 | */ |
| 1272 | static int pxa_ep_set_halt(struct usb_ep *_ep, int value) |
| 1273 | { |
| 1274 | struct pxa_ep *ep; |
| 1275 | struct udc_usb_ep *udc_usb_ep; |
| 1276 | unsigned long flags; |
| 1277 | int rc; |
| 1278 | |
| 1279 | |
| 1280 | if (!_ep) |
| 1281 | return -EINVAL; |
| 1282 | udc_usb_ep = container_of(_ep, struct udc_usb_ep, usb_ep); |
| 1283 | ep = udc_usb_ep->pxa_ep; |
| 1284 | if (!ep || is_ep0(ep)) |
| 1285 | return -EINVAL; |
| 1286 | |
| 1287 | if (value == 0) { |
| 1288 | /* |
| 1289 | * This path (reset toggle+halt) is needed to implement |
| 1290 | * SET_INTERFACE on normal hardware. but it can't be |
| 1291 | * done from software on the PXA UDC, and the hardware |
| 1292 | * forgets to do it as part of SET_INTERFACE automagic. |
| 1293 | */ |
| 1294 | ep_dbg(ep, "only host can clear halt\n"); |
| 1295 | return -EROFS; |
| 1296 | } |
| 1297 | |
| 1298 | spin_lock_irqsave(&ep->lock, flags); |
| 1299 | |
| 1300 | rc = -EAGAIN; |
| 1301 | if (ep->dir_in && (ep_is_full(ep) || !list_empty(&ep->queue))) |
| 1302 | goto out; |
| 1303 | |
| 1304 | /* FST, FEF bits are the same for control and non control endpoints */ |
| 1305 | rc = 0; |
Robert Jarzmik | 367815e | 2009-04-21 20:41:03 -0700 | [diff] [blame] | 1306 | ep_write_UDCCSR(ep, UDCCSR_FST | UDCCSR_FEF); |
Robert Jarzmik | d75379a | 2008-04-18 15:56:49 -0700 | [diff] [blame] | 1307 | if (is_ep0(ep)) |
| 1308 | set_ep0state(ep->dev, STALL); |
| 1309 | |
| 1310 | out: |
| 1311 | spin_unlock_irqrestore(&ep->lock, flags); |
| 1312 | return rc; |
| 1313 | } |
| 1314 | |
| 1315 | /** |
| 1316 | * pxa_ep_fifo_status - Get how many bytes in physical endpoint |
| 1317 | * @_ep: usb endpoint |
| 1318 | * |
| 1319 | * Returns number of bytes in OUT fifos. Broken for IN fifos. |
| 1320 | */ |
| 1321 | static int pxa_ep_fifo_status(struct usb_ep *_ep) |
| 1322 | { |
| 1323 | struct pxa_ep *ep; |
| 1324 | struct udc_usb_ep *udc_usb_ep; |
| 1325 | |
| 1326 | if (!_ep) |
| 1327 | return -ENODEV; |
| 1328 | udc_usb_ep = container_of(_ep, struct udc_usb_ep, usb_ep); |
| 1329 | ep = udc_usb_ep->pxa_ep; |
| 1330 | if (!ep || is_ep0(ep)) |
| 1331 | return -ENODEV; |
| 1332 | |
| 1333 | if (ep->dir_in) |
| 1334 | return -EOPNOTSUPP; |
| 1335 | if (ep->dev->gadget.speed == USB_SPEED_UNKNOWN || ep_is_empty(ep)) |
| 1336 | return 0; |
| 1337 | else |
| 1338 | return ep_count_bytes_remain(ep) + 1; |
| 1339 | } |
| 1340 | |
| 1341 | /** |
| 1342 | * pxa_ep_fifo_flush - Flushes one endpoint |
| 1343 | * @_ep: usb endpoint |
| 1344 | * |
| 1345 | * Discards all data in one endpoint(IN or OUT), except control endpoint. |
| 1346 | */ |
| 1347 | static void pxa_ep_fifo_flush(struct usb_ep *_ep) |
| 1348 | { |
| 1349 | struct pxa_ep *ep; |
| 1350 | struct udc_usb_ep *udc_usb_ep; |
| 1351 | unsigned long flags; |
| 1352 | |
| 1353 | if (!_ep) |
| 1354 | return; |
| 1355 | udc_usb_ep = container_of(_ep, struct udc_usb_ep, usb_ep); |
| 1356 | ep = udc_usb_ep->pxa_ep; |
| 1357 | if (!ep || is_ep0(ep)) |
| 1358 | return; |
| 1359 | |
| 1360 | spin_lock_irqsave(&ep->lock, flags); |
| 1361 | |
| 1362 | if (unlikely(!list_empty(&ep->queue))) |
| 1363 | ep_dbg(ep, "called while queue list not empty\n"); |
| 1364 | ep_dbg(ep, "called\n"); |
| 1365 | |
| 1366 | /* for OUT, just read and discard the FIFO contents. */ |
| 1367 | if (!ep->dir_in) { |
| 1368 | while (!ep_is_empty(ep)) |
| 1369 | udc_ep_readl(ep, UDCDR); |
| 1370 | } else { |
| 1371 | /* most IN status is the same, but ISO can't stall */ |
Robert Jarzmik | 367815e | 2009-04-21 20:41:03 -0700 | [diff] [blame] | 1372 | ep_write_UDCCSR(ep, |
Robert Jarzmik | d75379a | 2008-04-18 15:56:49 -0700 | [diff] [blame] | 1373 | UDCCSR_PC | UDCCSR_FEF | UDCCSR_TRN |
| 1374 | | (EPXFERTYPE_is_ISO(ep) ? 0 : UDCCSR_SST)); |
| 1375 | } |
| 1376 | |
| 1377 | spin_unlock_irqrestore(&ep->lock, flags); |
Robert Jarzmik | d75379a | 2008-04-18 15:56:49 -0700 | [diff] [blame] | 1378 | } |
| 1379 | |
| 1380 | /** |
| 1381 | * pxa_ep_enable - Enables usb endpoint |
| 1382 | * @_ep: usb endpoint |
| 1383 | * @desc: usb endpoint descriptor |
| 1384 | * |
| 1385 | * Nothing much to do here, as ep configuration is done once and for all |
| 1386 | * before udc is enabled. After udc enable, no physical endpoint configuration |
| 1387 | * can be changed. |
| 1388 | * Function makes sanity checks and flushes the endpoint. |
| 1389 | */ |
| 1390 | static int pxa_ep_enable(struct usb_ep *_ep, |
| 1391 | const struct usb_endpoint_descriptor *desc) |
| 1392 | { |
| 1393 | struct pxa_ep *ep; |
| 1394 | struct udc_usb_ep *udc_usb_ep; |
| 1395 | struct pxa_udc *udc; |
| 1396 | |
| 1397 | if (!_ep || !desc) |
| 1398 | return -EINVAL; |
| 1399 | |
| 1400 | udc_usb_ep = container_of(_ep, struct udc_usb_ep, usb_ep); |
| 1401 | if (udc_usb_ep->pxa_ep) { |
| 1402 | ep = udc_usb_ep->pxa_ep; |
| 1403 | ep_warn(ep, "usb_ep %s already enabled, doing nothing\n", |
| 1404 | _ep->name); |
| 1405 | } else { |
| 1406 | ep = find_pxa_ep(udc_usb_ep->dev, udc_usb_ep); |
| 1407 | } |
| 1408 | |
| 1409 | if (!ep || is_ep0(ep)) { |
| 1410 | dev_err(udc_usb_ep->dev->dev, |
| 1411 | "unable to match pxa_ep for ep %s\n", |
| 1412 | _ep->name); |
| 1413 | return -EINVAL; |
| 1414 | } |
| 1415 | |
| 1416 | if ((desc->bDescriptorType != USB_DT_ENDPOINT) |
| 1417 | || (ep->type != usb_endpoint_type(desc))) { |
| 1418 | ep_err(ep, "type mismatch\n"); |
| 1419 | return -EINVAL; |
| 1420 | } |
| 1421 | |
Kuninori Morimoto | 29cc889 | 2011-08-23 03:12:03 -0700 | [diff] [blame] | 1422 | if (ep->fifo_size < usb_endpoint_maxp(desc)) { |
Robert Jarzmik | d75379a | 2008-04-18 15:56:49 -0700 | [diff] [blame] | 1423 | ep_err(ep, "bad maxpacket\n"); |
| 1424 | return -ERANGE; |
| 1425 | } |
| 1426 | |
| 1427 | udc_usb_ep->pxa_ep = ep; |
| 1428 | udc = ep->dev; |
| 1429 | |
| 1430 | if (!udc->driver || udc->gadget.speed == USB_SPEED_UNKNOWN) { |
| 1431 | ep_err(ep, "bogus device state\n"); |
| 1432 | return -ESHUTDOWN; |
| 1433 | } |
| 1434 | |
| 1435 | ep->enabled = 1; |
| 1436 | |
| 1437 | /* flush fifo (mostly for OUT buffers) */ |
| 1438 | pxa_ep_fifo_flush(_ep); |
| 1439 | |
| 1440 | ep_dbg(ep, "enabled\n"); |
| 1441 | return 0; |
| 1442 | } |
| 1443 | |
| 1444 | /** |
| 1445 | * pxa_ep_disable - Disable usb endpoint |
| 1446 | * @_ep: usb endpoint |
| 1447 | * |
| 1448 | * Same as for pxa_ep_enable, no physical endpoint configuration can be |
| 1449 | * changed. |
| 1450 | * Function flushes the endpoint and related requests. |
| 1451 | */ |
| 1452 | static int pxa_ep_disable(struct usb_ep *_ep) |
| 1453 | { |
| 1454 | struct pxa_ep *ep; |
| 1455 | struct udc_usb_ep *udc_usb_ep; |
Robert Jarzmik | d75379a | 2008-04-18 15:56:49 -0700 | [diff] [blame] | 1456 | |
| 1457 | if (!_ep) |
| 1458 | return -EINVAL; |
| 1459 | |
| 1460 | udc_usb_ep = container_of(_ep, struct udc_usb_ep, usb_ep); |
| 1461 | ep = udc_usb_ep->pxa_ep; |
| 1462 | if (!ep || is_ep0(ep) || !list_empty(&ep->queue)) |
| 1463 | return -EINVAL; |
| 1464 | |
Robert Jarzmik | d75379a | 2008-04-18 15:56:49 -0700 | [diff] [blame] | 1465 | ep->enabled = 0; |
| 1466 | nuke(ep, -ESHUTDOWN); |
Robert Jarzmik | d75379a | 2008-04-18 15:56:49 -0700 | [diff] [blame] | 1467 | |
| 1468 | pxa_ep_fifo_flush(_ep); |
| 1469 | udc_usb_ep->pxa_ep = NULL; |
| 1470 | |
| 1471 | ep_dbg(ep, "disabled\n"); |
| 1472 | return 0; |
| 1473 | } |
| 1474 | |
| 1475 | static struct usb_ep_ops pxa_ep_ops = { |
| 1476 | .enable = pxa_ep_enable, |
| 1477 | .disable = pxa_ep_disable, |
| 1478 | |
| 1479 | .alloc_request = pxa_ep_alloc_request, |
| 1480 | .free_request = pxa_ep_free_request, |
| 1481 | |
| 1482 | .queue = pxa_ep_queue, |
| 1483 | .dequeue = pxa_ep_dequeue, |
| 1484 | |
| 1485 | .set_halt = pxa_ep_set_halt, |
| 1486 | .fifo_status = pxa_ep_fifo_status, |
| 1487 | .fifo_flush = pxa_ep_fifo_flush, |
| 1488 | }; |
| 1489 | |
Robert Jarzmik | eb50702 | 2009-01-24 23:55:34 -0800 | [diff] [blame] | 1490 | /** |
| 1491 | * dplus_pullup - Connect or disconnect pullup resistor to D+ pin |
| 1492 | * @udc: udc device |
| 1493 | * @on: 0 if disconnect pullup resistor, 1 otherwise |
| 1494 | * Context: any |
| 1495 | * |
| 1496 | * Handle D+ pullup resistor, make the device visible to the usb bus, and |
| 1497 | * declare it as a full speed usb device |
| 1498 | */ |
| 1499 | static void dplus_pullup(struct pxa_udc *udc, int on) |
| 1500 | { |
Robert Jarzmik | 2db88a7 | 2014-10-01 22:06:14 +0200 | [diff] [blame] | 1501 | if (udc->gpiod) { |
| 1502 | gpiod_set_value(udc->gpiod, on); |
Robert Jarzmik | 3ec8347 | 2014-10-01 22:06:15 +0200 | [diff] [blame] | 1503 | } else if (udc->udc_command) { |
Robert Jarzmik | 2db88a7 | 2014-10-01 22:06:14 +0200 | [diff] [blame] | 1504 | if (on) |
Robert Jarzmik | 3ec8347 | 2014-10-01 22:06:15 +0200 | [diff] [blame] | 1505 | udc->udc_command(PXA2XX_UDC_CMD_CONNECT); |
Robert Jarzmik | 2db88a7 | 2014-10-01 22:06:14 +0200 | [diff] [blame] | 1506 | else |
Robert Jarzmik | 3ec8347 | 2014-10-01 22:06:15 +0200 | [diff] [blame] | 1507 | udc->udc_command(PXA2XX_UDC_CMD_DISCONNECT); |
Robert Jarzmik | eb50702 | 2009-01-24 23:55:34 -0800 | [diff] [blame] | 1508 | } |
| 1509 | udc->pullup_on = on; |
| 1510 | } |
Robert Jarzmik | d75379a | 2008-04-18 15:56:49 -0700 | [diff] [blame] | 1511 | |
| 1512 | /** |
| 1513 | * pxa_udc_get_frame - Returns usb frame number |
| 1514 | * @_gadget: usb gadget |
| 1515 | */ |
| 1516 | static int pxa_udc_get_frame(struct usb_gadget *_gadget) |
| 1517 | { |
| 1518 | struct pxa_udc *udc = to_gadget_udc(_gadget); |
| 1519 | |
| 1520 | return (udc_readl(udc, UDCFNR) & 0x7ff); |
| 1521 | } |
| 1522 | |
| 1523 | /** |
| 1524 | * pxa_udc_wakeup - Force udc device out of suspend |
| 1525 | * @_gadget: usb gadget |
| 1526 | * |
Lucas De Marchi | 25985ed | 2011-03-30 22:57:33 -0300 | [diff] [blame] | 1527 | * Returns 0 if successful, error code otherwise |
Robert Jarzmik | d75379a | 2008-04-18 15:56:49 -0700 | [diff] [blame] | 1528 | */ |
| 1529 | static int pxa_udc_wakeup(struct usb_gadget *_gadget) |
| 1530 | { |
| 1531 | struct pxa_udc *udc = to_gadget_udc(_gadget); |
| 1532 | |
| 1533 | /* host may not have enabled remote wakeup */ |
| 1534 | if ((udc_readl(udc, UDCCR) & UDCCR_DWRE) == 0) |
| 1535 | return -EHOSTUNREACH; |
| 1536 | udc_set_mask_UDCCR(udc, UDCCR_UDR); |
| 1537 | return 0; |
| 1538 | } |
| 1539 | |
Robert Jarzmik | eb50702 | 2009-01-24 23:55:34 -0800 | [diff] [blame] | 1540 | static void udc_enable(struct pxa_udc *udc); |
| 1541 | static void udc_disable(struct pxa_udc *udc); |
| 1542 | |
| 1543 | /** |
| 1544 | * should_enable_udc - Tells if UDC should be enabled |
| 1545 | * @udc: udc device |
| 1546 | * Context: any |
| 1547 | * |
| 1548 | * The UDC should be enabled if : |
Robert Jarzmik | b799a7e | 2009-01-24 23:56:42 -0800 | [diff] [blame] | 1549 | |
Robert Jarzmik | eb50702 | 2009-01-24 23:55:34 -0800 | [diff] [blame] | 1550 | * - the pullup resistor is connected |
| 1551 | * - and a gadget driver is bound |
Robert Jarzmik | b799a7e | 2009-01-24 23:56:42 -0800 | [diff] [blame] | 1552 | * - and vbus is sensed (or no vbus sense is available) |
Robert Jarzmik | eb50702 | 2009-01-24 23:55:34 -0800 | [diff] [blame] | 1553 | * |
| 1554 | * Returns 1 if UDC should be enabled, 0 otherwise |
| 1555 | */ |
| 1556 | static int should_enable_udc(struct pxa_udc *udc) |
| 1557 | { |
| 1558 | int put_on; |
| 1559 | |
| 1560 | put_on = ((udc->pullup_on) && (udc->driver)); |
Kishon Vijay Abraham I | ded017e | 2012-06-26 17:40:32 +0530 | [diff] [blame] | 1561 | put_on &= ((udc->vbus_sensed) || (IS_ERR_OR_NULL(udc->transceiver))); |
Robert Jarzmik | eb50702 | 2009-01-24 23:55:34 -0800 | [diff] [blame] | 1562 | return put_on; |
| 1563 | } |
| 1564 | |
| 1565 | /** |
| 1566 | * should_disable_udc - Tells if UDC should be disabled |
| 1567 | * @udc: udc device |
| 1568 | * Context: any |
| 1569 | * |
| 1570 | * The UDC should be disabled if : |
| 1571 | * - the pullup resistor is not connected |
| 1572 | * - or no gadget driver is bound |
Robert Jarzmik | b799a7e | 2009-01-24 23:56:42 -0800 | [diff] [blame] | 1573 | * - or no vbus is sensed (when vbus sesing is available) |
Robert Jarzmik | eb50702 | 2009-01-24 23:55:34 -0800 | [diff] [blame] | 1574 | * |
| 1575 | * Returns 1 if UDC should be disabled |
| 1576 | */ |
| 1577 | static int should_disable_udc(struct pxa_udc *udc) |
| 1578 | { |
| 1579 | int put_off; |
| 1580 | |
| 1581 | put_off = ((!udc->pullup_on) || (!udc->driver)); |
Kishon Vijay Abraham I | ded017e | 2012-06-26 17:40:32 +0530 | [diff] [blame] | 1582 | put_off |= ((!udc->vbus_sensed) && (!IS_ERR_OR_NULL(udc->transceiver))); |
Robert Jarzmik | eb50702 | 2009-01-24 23:55:34 -0800 | [diff] [blame] | 1583 | return put_off; |
| 1584 | } |
| 1585 | |
| 1586 | /** |
| 1587 | * pxa_udc_pullup - Offer manual D+ pullup control |
| 1588 | * @_gadget: usb gadget using the control |
| 1589 | * @is_active: 0 if disconnect, else connect D+ pullup resistor |
| 1590 | * Context: !in_interrupt() |
| 1591 | * |
| 1592 | * Returns 0 if OK, -EOPNOTSUPP if udc driver doesn't handle D+ pullup |
| 1593 | */ |
| 1594 | static int pxa_udc_pullup(struct usb_gadget *_gadget, int is_active) |
| 1595 | { |
| 1596 | struct pxa_udc *udc = to_gadget_udc(_gadget); |
| 1597 | |
Robert Jarzmik | 3ec8347 | 2014-10-01 22:06:15 +0200 | [diff] [blame] | 1598 | if (!udc->gpiod && !udc->udc_command) |
Robert Jarzmik | eb50702 | 2009-01-24 23:55:34 -0800 | [diff] [blame] | 1599 | return -EOPNOTSUPP; |
| 1600 | |
| 1601 | dplus_pullup(udc, is_active); |
| 1602 | |
| 1603 | if (should_enable_udc(udc)) |
| 1604 | udc_enable(udc); |
| 1605 | if (should_disable_udc(udc)) |
| 1606 | udc_disable(udc); |
| 1607 | return 0; |
| 1608 | } |
| 1609 | |
Robert Jarzmik | b799a7e | 2009-01-24 23:56:42 -0800 | [diff] [blame] | 1610 | static void udc_enable(struct pxa_udc *udc); |
| 1611 | static void udc_disable(struct pxa_udc *udc); |
| 1612 | |
| 1613 | /** |
| 1614 | * pxa_udc_vbus_session - Called by external transceiver to enable/disable udc |
| 1615 | * @_gadget: usb gadget |
| 1616 | * @is_active: 0 if should disable the udc, 1 if should enable |
| 1617 | * |
| 1618 | * Enables the udc, and optionnaly activates D+ pullup resistor. Or disables the |
| 1619 | * udc, and deactivates D+ pullup resistor. |
| 1620 | * |
| 1621 | * Returns 0 |
| 1622 | */ |
| 1623 | static int pxa_udc_vbus_session(struct usb_gadget *_gadget, int is_active) |
| 1624 | { |
| 1625 | struct pxa_udc *udc = to_gadget_udc(_gadget); |
| 1626 | |
| 1627 | udc->vbus_sensed = is_active; |
| 1628 | if (should_enable_udc(udc)) |
| 1629 | udc_enable(udc); |
| 1630 | if (should_disable_udc(udc)) |
| 1631 | udc_disable(udc); |
| 1632 | |
| 1633 | return 0; |
| 1634 | } |
| 1635 | |
Robert Jarzmik | ee069fb | 2009-01-24 23:59:38 -0800 | [diff] [blame] | 1636 | /** |
| 1637 | * pxa_udc_vbus_draw - Called by gadget driver after SET_CONFIGURATION completed |
| 1638 | * @_gadget: usb gadget |
| 1639 | * @mA: current drawn |
| 1640 | * |
| 1641 | * Context: !in_interrupt() |
| 1642 | * |
| 1643 | * Called after a configuration was chosen by a USB host, to inform how much |
| 1644 | * current can be drawn by the device from VBus line. |
| 1645 | * |
| 1646 | * Returns 0 or -EOPNOTSUPP if no transceiver is handling the udc |
| 1647 | */ |
| 1648 | static int pxa_udc_vbus_draw(struct usb_gadget *_gadget, unsigned mA) |
| 1649 | { |
| 1650 | struct pxa_udc *udc; |
| 1651 | |
| 1652 | udc = to_gadget_udc(_gadget); |
Kishon Vijay Abraham I | ded017e | 2012-06-26 17:40:32 +0530 | [diff] [blame] | 1653 | if (!IS_ERR_OR_NULL(udc->transceiver)) |
Heikki Krogerus | b96d3b0 | 2012-02-13 13:24:18 +0200 | [diff] [blame] | 1654 | return usb_phy_set_power(udc->transceiver, mA); |
Robert Jarzmik | ee069fb | 2009-01-24 23:59:38 -0800 | [diff] [blame] | 1655 | return -EOPNOTSUPP; |
| 1656 | } |
| 1657 | |
Felipe Balbi | 70189a6 | 2013-01-24 17:16:39 +0200 | [diff] [blame] | 1658 | static int pxa27x_udc_start(struct usb_gadget *g, |
| 1659 | struct usb_gadget_driver *driver); |
Felipe Balbi | 22835b8 | 2014-10-17 12:05:12 -0500 | [diff] [blame] | 1660 | static int pxa27x_udc_stop(struct usb_gadget *g); |
Sebastian Andrzej Siewior | 0f91349 | 2011-06-28 16:33:47 +0300 | [diff] [blame] | 1661 | |
Robert Jarzmik | d75379a | 2008-04-18 15:56:49 -0700 | [diff] [blame] | 1662 | static const struct usb_gadget_ops pxa_udc_ops = { |
| 1663 | .get_frame = pxa_udc_get_frame, |
| 1664 | .wakeup = pxa_udc_wakeup, |
Robert Jarzmik | eb50702 | 2009-01-24 23:55:34 -0800 | [diff] [blame] | 1665 | .pullup = pxa_udc_pullup, |
Robert Jarzmik | b799a7e | 2009-01-24 23:56:42 -0800 | [diff] [blame] | 1666 | .vbus_session = pxa_udc_vbus_session, |
Robert Jarzmik | ee069fb | 2009-01-24 23:59:38 -0800 | [diff] [blame] | 1667 | .vbus_draw = pxa_udc_vbus_draw, |
Felipe Balbi | 70189a6 | 2013-01-24 17:16:39 +0200 | [diff] [blame] | 1668 | .udc_start = pxa27x_udc_start, |
| 1669 | .udc_stop = pxa27x_udc_stop, |
Robert Jarzmik | d75379a | 2008-04-18 15:56:49 -0700 | [diff] [blame] | 1670 | }; |
| 1671 | |
| 1672 | /** |
| 1673 | * udc_disable - disable udc device controller |
| 1674 | * @udc: udc device |
Robert Jarzmik | eb50702 | 2009-01-24 23:55:34 -0800 | [diff] [blame] | 1675 | * Context: any |
Robert Jarzmik | d75379a | 2008-04-18 15:56:49 -0700 | [diff] [blame] | 1676 | * |
| 1677 | * Disables the udc device : disables clocks, udc interrupts, control endpoint |
| 1678 | * interrupts. |
| 1679 | */ |
| 1680 | static void udc_disable(struct pxa_udc *udc) |
| 1681 | { |
Robert Jarzmik | eb50702 | 2009-01-24 23:55:34 -0800 | [diff] [blame] | 1682 | if (!udc->enabled) |
| 1683 | return; |
| 1684 | |
Robert Jarzmik | d75379a | 2008-04-18 15:56:49 -0700 | [diff] [blame] | 1685 | udc_writel(udc, UDCICR0, 0); |
| 1686 | udc_writel(udc, UDCICR1, 0); |
| 1687 | |
| 1688 | udc_clear_mask_UDCCR(udc, UDCCR_UDE); |
Robert Jarzmik | d75379a | 2008-04-18 15:56:49 -0700 | [diff] [blame] | 1689 | |
| 1690 | ep0_idle(udc); |
| 1691 | udc->gadget.speed = USB_SPEED_UNKNOWN; |
Robert Jarzmik | f4fd094 | 2014-10-17 22:43:06 +0200 | [diff] [blame] | 1692 | clk_disable(udc->clk); |
Robert Jarzmik | eb50702 | 2009-01-24 23:55:34 -0800 | [diff] [blame] | 1693 | |
| 1694 | udc->enabled = 0; |
Robert Jarzmik | d75379a | 2008-04-18 15:56:49 -0700 | [diff] [blame] | 1695 | } |
| 1696 | |
| 1697 | /** |
| 1698 | * udc_init_data - Initialize udc device data structures |
| 1699 | * @dev: udc device |
| 1700 | * |
| 1701 | * Initializes gadget endpoint list, endpoints locks. No action is taken |
| 1702 | * on the hardware. |
| 1703 | */ |
Felipe Balbi | 50757b2 | 2013-04-02 17:13:40 +0300 | [diff] [blame] | 1704 | static void udc_init_data(struct pxa_udc *dev) |
Robert Jarzmik | d75379a | 2008-04-18 15:56:49 -0700 | [diff] [blame] | 1705 | { |
| 1706 | int i; |
| 1707 | struct pxa_ep *ep; |
| 1708 | |
| 1709 | /* device/ep0 records init */ |
| 1710 | INIT_LIST_HEAD(&dev->gadget.ep_list); |
| 1711 | INIT_LIST_HEAD(&dev->gadget.ep0->ep_list); |
| 1712 | dev->udc_usb_ep[0].pxa_ep = &dev->pxa_ep[0]; |
Robert Baldyga | ffd9a0f | 2015-07-28 07:19:58 +0200 | [diff] [blame] | 1713 | dev->gadget.quirk_altset_not_supp = 1; |
Robert Jarzmik | d75379a | 2008-04-18 15:56:49 -0700 | [diff] [blame] | 1714 | ep0_idle(dev); |
Robert Jarzmik | d75379a | 2008-04-18 15:56:49 -0700 | [diff] [blame] | 1715 | |
| 1716 | /* PXA endpoints init */ |
| 1717 | for (i = 0; i < NR_PXA_ENDPOINTS; i++) { |
| 1718 | ep = &dev->pxa_ep[i]; |
| 1719 | |
| 1720 | ep->enabled = is_ep0(ep); |
| 1721 | INIT_LIST_HEAD(&ep->queue); |
| 1722 | spin_lock_init(&ep->lock); |
| 1723 | } |
| 1724 | |
| 1725 | /* USB endpoints init */ |
Robert Baldyga | e117e74 | 2013-12-13 12:23:38 +0100 | [diff] [blame] | 1726 | for (i = 1; i < NR_USB_ENDPOINTS; i++) { |
Vernon Sauder | 4c24b6d | 2009-03-20 01:44:50 -0700 | [diff] [blame] | 1727 | list_add_tail(&dev->udc_usb_ep[i].usb_ep.ep_list, |
| 1728 | &dev->gadget.ep_list); |
Robert Baldyga | e117e74 | 2013-12-13 12:23:38 +0100 | [diff] [blame] | 1729 | usb_ep_set_maxpacket_limit(&dev->udc_usb_ep[i].usb_ep, |
| 1730 | dev->udc_usb_ep[i].usb_ep.maxpacket); |
| 1731 | } |
Robert Jarzmik | d75379a | 2008-04-18 15:56:49 -0700 | [diff] [blame] | 1732 | } |
| 1733 | |
| 1734 | /** |
| 1735 | * udc_enable - Enables the udc device |
| 1736 | * @dev: udc device |
| 1737 | * |
| 1738 | * Enables the udc device : enables clocks, udc interrupts, control endpoint |
| 1739 | * interrupts, sets usb as UDC client and setups endpoints. |
| 1740 | */ |
| 1741 | static void udc_enable(struct pxa_udc *udc) |
| 1742 | { |
Robert Jarzmik | eb50702 | 2009-01-24 23:55:34 -0800 | [diff] [blame] | 1743 | if (udc->enabled) |
| 1744 | return; |
| 1745 | |
Robert Jarzmik | f4fd094 | 2014-10-17 22:43:06 +0200 | [diff] [blame] | 1746 | clk_enable(udc->clk); |
Robert Jarzmik | d75379a | 2008-04-18 15:56:49 -0700 | [diff] [blame] | 1747 | udc_writel(udc, UDCICR0, 0); |
| 1748 | udc_writel(udc, UDCICR1, 0); |
Robert Jarzmik | d75379a | 2008-04-18 15:56:49 -0700 | [diff] [blame] | 1749 | udc_clear_mask_UDCCR(udc, UDCCR_UDE); |
| 1750 | |
Robert Jarzmik | d75379a | 2008-04-18 15:56:49 -0700 | [diff] [blame] | 1751 | ep0_idle(udc); |
| 1752 | udc->gadget.speed = USB_SPEED_FULL; |
| 1753 | memset(&udc->stats, 0, sizeof(udc->stats)); |
| 1754 | |
Robert Jarzmik | f4fd094 | 2014-10-17 22:43:06 +0200 | [diff] [blame] | 1755 | pxa_eps_setup(udc); |
Robert Jarzmik | d75379a | 2008-04-18 15:56:49 -0700 | [diff] [blame] | 1756 | udc_set_mask_UDCCR(udc, UDCCR_UDE); |
Robert Jarzmik | 367815e | 2009-04-21 20:41:03 -0700 | [diff] [blame] | 1757 | ep_write_UDCCSR(&udc->pxa_ep[0], UDCCSR0_ACM); |
Robert Jarzmik | d75379a | 2008-04-18 15:56:49 -0700 | [diff] [blame] | 1758 | udelay(2); |
| 1759 | if (udc_readl(udc, UDCCR) & UDCCR_EMCE) |
| 1760 | dev_err(udc->dev, "Configuration errors, udc disabled\n"); |
| 1761 | |
| 1762 | /* |
| 1763 | * Caller must be able to sleep in order to cope with startup transients |
| 1764 | */ |
| 1765 | msleep(100); |
| 1766 | |
| 1767 | /* enable suspend/resume and reset irqs */ |
| 1768 | udc_writel(udc, UDCICR1, |
| 1769 | UDCICR1_IECC | UDCICR1_IERU |
| 1770 | | UDCICR1_IESU | UDCICR1_IERS); |
| 1771 | |
| 1772 | /* enable ep0 irqs */ |
| 1773 | pio_irq_enable(&udc->pxa_ep[0]); |
| 1774 | |
Robert Jarzmik | eb50702 | 2009-01-24 23:55:34 -0800 | [diff] [blame] | 1775 | udc->enabled = 1; |
Robert Jarzmik | d75379a | 2008-04-18 15:56:49 -0700 | [diff] [blame] | 1776 | } |
| 1777 | |
| 1778 | /** |
Sebastian Andrzej Siewior | 0f91349 | 2011-06-28 16:33:47 +0300 | [diff] [blame] | 1779 | * pxa27x_start - Register gadget driver |
Robert Jarzmik | d75379a | 2008-04-18 15:56:49 -0700 | [diff] [blame] | 1780 | * @driver: gadget driver |
Uwe Kleine-König | b0fca50 | 2010-08-12 17:43:53 +0200 | [diff] [blame] | 1781 | * @bind: bind function |
Robert Jarzmik | d75379a | 2008-04-18 15:56:49 -0700 | [diff] [blame] | 1782 | * |
| 1783 | * When a driver is successfully registered, it will receive control requests |
| 1784 | * including set_configuration(), which enables non-control requests. Then |
| 1785 | * usb traffic follows until a disconnect is reported. Then a host may connect |
| 1786 | * again, or the driver might get unbound. |
| 1787 | * |
Robert Jarzmik | eb50702 | 2009-01-24 23:55:34 -0800 | [diff] [blame] | 1788 | * Note that the udc is not automatically enabled. Check function |
| 1789 | * should_enable_udc(). |
| 1790 | * |
Robert Jarzmik | d75379a | 2008-04-18 15:56:49 -0700 | [diff] [blame] | 1791 | * Returns 0 if no error, -EINVAL, -ENODEV, -EBUSY otherwise |
| 1792 | */ |
Felipe Balbi | 70189a6 | 2013-01-24 17:16:39 +0200 | [diff] [blame] | 1793 | static int pxa27x_udc_start(struct usb_gadget *g, |
| 1794 | struct usb_gadget_driver *driver) |
Robert Jarzmik | d75379a | 2008-04-18 15:56:49 -0700 | [diff] [blame] | 1795 | { |
Felipe Balbi | 70189a6 | 2013-01-24 17:16:39 +0200 | [diff] [blame] | 1796 | struct pxa_udc *udc = to_pxa(g); |
Robert Jarzmik | d75379a | 2008-04-18 15:56:49 -0700 | [diff] [blame] | 1797 | int retval; |
| 1798 | |
Robert Jarzmik | d75379a | 2008-04-18 15:56:49 -0700 | [diff] [blame] | 1799 | /* first hook up the driver ... */ |
| 1800 | udc->driver = driver; |
Robert Jarzmik | d75379a | 2008-04-18 15:56:49 -0700 | [diff] [blame] | 1801 | |
Kishon Vijay Abraham I | ded017e | 2012-06-26 17:40:32 +0530 | [diff] [blame] | 1802 | if (!IS_ERR_OR_NULL(udc->transceiver)) { |
Heikki Krogerus | 6e13c65 | 2012-02-13 13:24:20 +0200 | [diff] [blame] | 1803 | retval = otg_set_peripheral(udc->transceiver->otg, |
| 1804 | &udc->gadget); |
Robert Jarzmik | 7fec3c2 | 2009-01-24 23:57:30 -0800 | [diff] [blame] | 1805 | if (retval) { |
| 1806 | dev_err(udc->dev, "can't bind to transceiver\n"); |
Felipe Balbi | 70189a6 | 2013-01-24 17:16:39 +0200 | [diff] [blame] | 1807 | goto fail; |
Robert Jarzmik | 7fec3c2 | 2009-01-24 23:57:30 -0800 | [diff] [blame] | 1808 | } |
| 1809 | } |
| 1810 | |
Robert Jarzmik | eb50702 | 2009-01-24 23:55:34 -0800 | [diff] [blame] | 1811 | if (should_enable_udc(udc)) |
| 1812 | udc_enable(udc); |
Robert Jarzmik | d75379a | 2008-04-18 15:56:49 -0700 | [diff] [blame] | 1813 | return 0; |
| 1814 | |
Felipe Balbi | 70189a6 | 2013-01-24 17:16:39 +0200 | [diff] [blame] | 1815 | fail: |
Robert Jarzmik | d75379a | 2008-04-18 15:56:49 -0700 | [diff] [blame] | 1816 | udc->driver = NULL; |
Robert Jarzmik | d75379a | 2008-04-18 15:56:49 -0700 | [diff] [blame] | 1817 | return retval; |
| 1818 | } |
Robert Jarzmik | d75379a | 2008-04-18 15:56:49 -0700 | [diff] [blame] | 1819 | |
| 1820 | /** |
| 1821 | * stop_activity - Stops udc endpoints |
| 1822 | * @udc: udc device |
| 1823 | * @driver: gadget driver |
| 1824 | * |
| 1825 | * Disables all udc endpoints (even control endpoint), report disconnect to |
| 1826 | * the gadget user. |
| 1827 | */ |
Arnd Bergmann | b89e5f1 | 2016-06-16 13:38:25 +0200 | [diff] [blame] | 1828 | static void stop_activity(struct pxa_udc *udc) |
Robert Jarzmik | d75379a | 2008-04-18 15:56:49 -0700 | [diff] [blame] | 1829 | { |
| 1830 | int i; |
| 1831 | |
Robert Jarzmik | d75379a | 2008-04-18 15:56:49 -0700 | [diff] [blame] | 1832 | udc->gadget.speed = USB_SPEED_UNKNOWN; |
| 1833 | |
| 1834 | for (i = 0; i < NR_USB_ENDPOINTS; i++) |
| 1835 | pxa_ep_disable(&udc->udc_usb_ep[i].usb_ep); |
Robert Jarzmik | d75379a | 2008-04-18 15:56:49 -0700 | [diff] [blame] | 1836 | } |
| 1837 | |
| 1838 | /** |
Sebastian Andrzej Siewior | 0f91349 | 2011-06-28 16:33:47 +0300 | [diff] [blame] | 1839 | * pxa27x_udc_stop - Unregister the gadget driver |
Robert Jarzmik | d75379a | 2008-04-18 15:56:49 -0700 | [diff] [blame] | 1840 | * @driver: gadget driver |
| 1841 | * |
| 1842 | * Returns 0 if no error, -ENODEV, -EINVAL otherwise |
| 1843 | */ |
Felipe Balbi | 22835b8 | 2014-10-17 12:05:12 -0500 | [diff] [blame] | 1844 | static int pxa27x_udc_stop(struct usb_gadget *g) |
Robert Jarzmik | d75379a | 2008-04-18 15:56:49 -0700 | [diff] [blame] | 1845 | { |
Felipe Balbi | 70189a6 | 2013-01-24 17:16:39 +0200 | [diff] [blame] | 1846 | struct pxa_udc *udc = to_pxa(g); |
Robert Jarzmik | d75379a | 2008-04-18 15:56:49 -0700 | [diff] [blame] | 1847 | |
Arnd Bergmann | b89e5f1 | 2016-06-16 13:38:25 +0200 | [diff] [blame] | 1848 | stop_activity(udc); |
Robert Jarzmik | d75379a | 2008-04-18 15:56:49 -0700 | [diff] [blame] | 1849 | udc_disable(udc); |
| 1850 | |
Robert Jarzmik | d75379a | 2008-04-18 15:56:49 -0700 | [diff] [blame] | 1851 | udc->driver = NULL; |
| 1852 | |
Kishon Vijay Abraham I | ded017e | 2012-06-26 17:40:32 +0530 | [diff] [blame] | 1853 | if (!IS_ERR_OR_NULL(udc->transceiver)) |
Heikki Krogerus | 6e13c65 | 2012-02-13 13:24:20 +0200 | [diff] [blame] | 1854 | return otg_set_peripheral(udc->transceiver->otg, NULL); |
Robert Jarzmik | d75379a | 2008-04-18 15:56:49 -0700 | [diff] [blame] | 1855 | return 0; |
| 1856 | } |
Robert Jarzmik | d75379a | 2008-04-18 15:56:49 -0700 | [diff] [blame] | 1857 | |
| 1858 | /** |
| 1859 | * handle_ep0_ctrl_req - handle control endpoint control request |
| 1860 | * @udc: udc device |
| 1861 | * @req: control request |
| 1862 | */ |
| 1863 | static void handle_ep0_ctrl_req(struct pxa_udc *udc, |
| 1864 | struct pxa27x_request *req) |
| 1865 | { |
| 1866 | struct pxa_ep *ep = &udc->pxa_ep[0]; |
| 1867 | union { |
| 1868 | struct usb_ctrlrequest r; |
| 1869 | u32 word[2]; |
| 1870 | } u; |
| 1871 | int i; |
| 1872 | int have_extrabytes = 0; |
Robert Jarzmik | 5e23e90 | 2010-01-27 18:38:03 +0100 | [diff] [blame] | 1873 | unsigned long flags; |
Robert Jarzmik | d75379a | 2008-04-18 15:56:49 -0700 | [diff] [blame] | 1874 | |
| 1875 | nuke(ep, -EPROTO); |
Robert Jarzmik | 5e23e90 | 2010-01-27 18:38:03 +0100 | [diff] [blame] | 1876 | spin_lock_irqsave(&ep->lock, flags); |
Robert Jarzmik | d75379a | 2008-04-18 15:56:49 -0700 | [diff] [blame] | 1877 | |
Robert Jarzmik | 9f5351b | 2009-04-21 20:34:44 -0700 | [diff] [blame] | 1878 | /* |
| 1879 | * In the PXA320 manual, in the section about Back-to-Back setup |
| 1880 | * packets, it describes this situation. The solution is to set OPC to |
| 1881 | * get rid of the status packet, and then continue with the setup |
| 1882 | * packet. Generalize to pxa27x CPUs. |
| 1883 | */ |
| 1884 | if (epout_has_pkt(ep) && (ep_count_bytes_remain(ep) == 0)) |
Robert Jarzmik | 367815e | 2009-04-21 20:41:03 -0700 | [diff] [blame] | 1885 | ep_write_UDCCSR(ep, UDCCSR0_OPC); |
Robert Jarzmik | 9f5351b | 2009-04-21 20:34:44 -0700 | [diff] [blame] | 1886 | |
Robert Jarzmik | d75379a | 2008-04-18 15:56:49 -0700 | [diff] [blame] | 1887 | /* read SETUP packet */ |
| 1888 | for (i = 0; i < 2; i++) { |
| 1889 | if (unlikely(ep_is_empty(ep))) |
| 1890 | goto stall; |
| 1891 | u.word[i] = udc_ep_readl(ep, UDCDR); |
| 1892 | } |
| 1893 | |
| 1894 | have_extrabytes = !ep_is_empty(ep); |
| 1895 | while (!ep_is_empty(ep)) { |
| 1896 | i = udc_ep_readl(ep, UDCDR); |
| 1897 | ep_err(ep, "wrong to have extra bytes for setup : 0x%08x\n", i); |
| 1898 | } |
| 1899 | |
Robert Jarzmik | d75379a | 2008-04-18 15:56:49 -0700 | [diff] [blame] | 1900 | ep_dbg(ep, "SETUP %02x.%02x v%04x i%04x l%04x\n", |
| 1901 | u.r.bRequestType, u.r.bRequest, |
Robert Jarzmik | 5a59bc5 | 2008-05-12 10:47:56 -0700 | [diff] [blame] | 1902 | le16_to_cpu(u.r.wValue), le16_to_cpu(u.r.wIndex), |
| 1903 | le16_to_cpu(u.r.wLength)); |
Robert Jarzmik | d75379a | 2008-04-18 15:56:49 -0700 | [diff] [blame] | 1904 | if (unlikely(have_extrabytes)) |
| 1905 | goto stall; |
| 1906 | |
| 1907 | if (u.r.bRequestType & USB_DIR_IN) |
| 1908 | set_ep0state(udc, IN_DATA_STAGE); |
| 1909 | else |
| 1910 | set_ep0state(udc, OUT_DATA_STAGE); |
| 1911 | |
| 1912 | /* Tell UDC to enter Data Stage */ |
Robert Jarzmik | 367815e | 2009-04-21 20:41:03 -0700 | [diff] [blame] | 1913 | ep_write_UDCCSR(ep, UDCCSR0_SA | UDCCSR0_OPC); |
Robert Jarzmik | d75379a | 2008-04-18 15:56:49 -0700 | [diff] [blame] | 1914 | |
Robert Jarzmik | 5e23e90 | 2010-01-27 18:38:03 +0100 | [diff] [blame] | 1915 | spin_unlock_irqrestore(&ep->lock, flags); |
Robert Jarzmik | d75379a | 2008-04-18 15:56:49 -0700 | [diff] [blame] | 1916 | i = udc->driver->setup(&udc->gadget, &u.r); |
Robert Jarzmik | 5e23e90 | 2010-01-27 18:38:03 +0100 | [diff] [blame] | 1917 | spin_lock_irqsave(&ep->lock, flags); |
Robert Jarzmik | d75379a | 2008-04-18 15:56:49 -0700 | [diff] [blame] | 1918 | if (i < 0) |
| 1919 | goto stall; |
| 1920 | out: |
Robert Jarzmik | 5e23e90 | 2010-01-27 18:38:03 +0100 | [diff] [blame] | 1921 | spin_unlock_irqrestore(&ep->lock, flags); |
Robert Jarzmik | d75379a | 2008-04-18 15:56:49 -0700 | [diff] [blame] | 1922 | return; |
| 1923 | stall: |
| 1924 | ep_dbg(ep, "protocol STALL, udccsr0=%03x err %d\n", |
| 1925 | udc_ep_readl(ep, UDCCSR), i); |
Robert Jarzmik | 367815e | 2009-04-21 20:41:03 -0700 | [diff] [blame] | 1926 | ep_write_UDCCSR(ep, UDCCSR0_FST | UDCCSR0_FTF); |
Robert Jarzmik | d75379a | 2008-04-18 15:56:49 -0700 | [diff] [blame] | 1927 | set_ep0state(udc, STALL); |
| 1928 | goto out; |
| 1929 | } |
| 1930 | |
| 1931 | /** |
| 1932 | * handle_ep0 - Handle control endpoint data transfers |
| 1933 | * @udc: udc device |
| 1934 | * @fifo_irq: 1 if triggered by fifo service type irq |
| 1935 | * @opc_irq: 1 if triggered by output packet complete type irq |
| 1936 | * |
| 1937 | * Context : when in_interrupt() or with ep->lock held |
| 1938 | * |
| 1939 | * Tries to transfer all pending request data into the endpoint and/or |
| 1940 | * transfer all pending data in the endpoint into usb requests. |
| 1941 | * Handles states of ep0 automata. |
| 1942 | * |
| 1943 | * PXA27x hardware handles several standard usb control requests without |
| 1944 | * driver notification. The requests fully handled by hardware are : |
| 1945 | * SET_ADDRESS, SET_FEATURE, CLEAR_FEATURE, GET_CONFIGURATION, GET_INTERFACE, |
| 1946 | * GET_STATUS |
| 1947 | * The requests handled by hardware, but with irq notification are : |
| 1948 | * SYNCH_FRAME, SET_CONFIGURATION, SET_INTERFACE |
| 1949 | * The remaining standard requests really handled by handle_ep0 are : |
| 1950 | * GET_DESCRIPTOR, SET_DESCRIPTOR, specific requests. |
| 1951 | * Requests standardized outside of USB 2.0 chapter 9 are handled more |
| 1952 | * uniformly, by gadget drivers. |
| 1953 | * |
| 1954 | * The control endpoint state machine is _not_ USB spec compliant, it's even |
| 1955 | * hardly compliant with Intel PXA270 developers guide. |
| 1956 | * The key points which inferred this state machine are : |
| 1957 | * - on every setup token, bit UDCCSR0_SA is raised and held until cleared by |
| 1958 | * software. |
| 1959 | * - on every OUT packet received, UDCCSR0_OPC is raised and held until |
| 1960 | * cleared by software. |
| 1961 | * - clearing UDCCSR0_OPC always flushes ep0. If in setup stage, never do it |
| 1962 | * before reading ep0. |
Robert Jarzmik | 9f5351b | 2009-04-21 20:34:44 -0700 | [diff] [blame] | 1963 | * This is true only for PXA27x. This is not true anymore for PXA3xx family |
| 1964 | * (check Back-to-Back setup packet in developers guide). |
Robert Jarzmik | d75379a | 2008-04-18 15:56:49 -0700 | [diff] [blame] | 1965 | * - irq can be called on a "packet complete" event (opc_irq=1), while |
| 1966 | * UDCCSR0_OPC is not yet raised (delta can be as big as 100ms |
| 1967 | * from experimentation). |
| 1968 | * - as UDCCSR0_SA can be activated while in irq handling, and clearing |
| 1969 | * UDCCSR0_OPC would flush the setup data, we almost never clear UDCCSR0_OPC |
| 1970 | * => we never actually read the "status stage" packet of an IN data stage |
| 1971 | * => this is not documented in Intel documentation |
| 1972 | * - hardware as no idea of STATUS STAGE, it only handle SETUP STAGE and DATA |
| 1973 | * STAGE. The driver add STATUS STAGE to send last zero length packet in |
| 1974 | * OUT_STATUS_STAGE. |
| 1975 | * - special attention was needed for IN_STATUS_STAGE. If a packet complete |
| 1976 | * event is detected, we terminate the status stage without ackowledging the |
| 1977 | * packet (not to risk to loose a potential SETUP packet) |
| 1978 | */ |
| 1979 | static void handle_ep0(struct pxa_udc *udc, int fifo_irq, int opc_irq) |
| 1980 | { |
| 1981 | u32 udccsr0; |
| 1982 | struct pxa_ep *ep = &udc->pxa_ep[0]; |
| 1983 | struct pxa27x_request *req = NULL; |
| 1984 | int completed = 0; |
| 1985 | |
Vernon Sauder | 4c24b6d | 2009-03-20 01:44:50 -0700 | [diff] [blame] | 1986 | if (!list_empty(&ep->queue)) |
| 1987 | req = list_entry(ep->queue.next, struct pxa27x_request, queue); |
| 1988 | |
Robert Jarzmik | d75379a | 2008-04-18 15:56:49 -0700 | [diff] [blame] | 1989 | udccsr0 = udc_ep_readl(ep, UDCCSR); |
| 1990 | ep_dbg(ep, "state=%s, req=%p, udccsr0=0x%03x, udcbcr=%d, irq_msk=%x\n", |
| 1991 | EP0_STNAME(udc), req, udccsr0, udc_ep_readl(ep, UDCBCR), |
| 1992 | (fifo_irq << 1 | opc_irq)); |
| 1993 | |
Robert Jarzmik | d75379a | 2008-04-18 15:56:49 -0700 | [diff] [blame] | 1994 | if (udccsr0 & UDCCSR0_SST) { |
| 1995 | ep_dbg(ep, "clearing stall status\n"); |
| 1996 | nuke(ep, -EPIPE); |
Robert Jarzmik | 367815e | 2009-04-21 20:41:03 -0700 | [diff] [blame] | 1997 | ep_write_UDCCSR(ep, UDCCSR0_SST); |
Robert Jarzmik | d75379a | 2008-04-18 15:56:49 -0700 | [diff] [blame] | 1998 | ep0_idle(udc); |
| 1999 | } |
| 2000 | |
| 2001 | if (udccsr0 & UDCCSR0_SA) { |
| 2002 | nuke(ep, 0); |
| 2003 | set_ep0state(udc, SETUP_STAGE); |
| 2004 | } |
| 2005 | |
| 2006 | switch (udc->ep0state) { |
| 2007 | case WAIT_FOR_SETUP: |
| 2008 | /* |
| 2009 | * Hardware bug : beware, we cannot clear OPC, since we would |
| 2010 | * miss a potential OPC irq for a setup packet. |
| 2011 | * So, we only do ... nothing, and hope for a next irq with |
| 2012 | * UDCCSR0_SA set. |
| 2013 | */ |
| 2014 | break; |
| 2015 | case SETUP_STAGE: |
| 2016 | udccsr0 &= UDCCSR0_CTRL_REQ_MASK; |
| 2017 | if (likely(udccsr0 == UDCCSR0_CTRL_REQ_MASK)) |
| 2018 | handle_ep0_ctrl_req(udc, req); |
| 2019 | break; |
| 2020 | case IN_DATA_STAGE: /* GET_DESCRIPTOR */ |
| 2021 | if (epout_has_pkt(ep)) |
Robert Jarzmik | 367815e | 2009-04-21 20:41:03 -0700 | [diff] [blame] | 2022 | ep_write_UDCCSR(ep, UDCCSR0_OPC); |
Robert Jarzmik | d75379a | 2008-04-18 15:56:49 -0700 | [diff] [blame] | 2023 | if (req && !ep_is_full(ep)) |
| 2024 | completed = write_ep0_fifo(ep, req); |
| 2025 | if (completed) |
Robert Jarzmik | 5e23e90 | 2010-01-27 18:38:03 +0100 | [diff] [blame] | 2026 | ep0_end_in_req(ep, req, NULL); |
Robert Jarzmik | d75379a | 2008-04-18 15:56:49 -0700 | [diff] [blame] | 2027 | break; |
| 2028 | case OUT_DATA_STAGE: /* SET_DESCRIPTOR */ |
| 2029 | if (epout_has_pkt(ep) && req) |
| 2030 | completed = read_ep0_fifo(ep, req); |
| 2031 | if (completed) |
Robert Jarzmik | 5e23e90 | 2010-01-27 18:38:03 +0100 | [diff] [blame] | 2032 | ep0_end_out_req(ep, req, NULL); |
Robert Jarzmik | d75379a | 2008-04-18 15:56:49 -0700 | [diff] [blame] | 2033 | break; |
| 2034 | case STALL: |
Robert Jarzmik | 367815e | 2009-04-21 20:41:03 -0700 | [diff] [blame] | 2035 | ep_write_UDCCSR(ep, UDCCSR0_FST); |
Robert Jarzmik | d75379a | 2008-04-18 15:56:49 -0700 | [diff] [blame] | 2036 | break; |
| 2037 | case IN_STATUS_STAGE: |
| 2038 | /* |
| 2039 | * Hardware bug : beware, we cannot clear OPC, since we would |
| 2040 | * miss a potential PC irq for a setup packet. |
| 2041 | * So, we only put the ep0 into WAIT_FOR_SETUP state. |
| 2042 | */ |
| 2043 | if (opc_irq) |
| 2044 | ep0_idle(udc); |
| 2045 | break; |
| 2046 | case OUT_STATUS_STAGE: |
| 2047 | case WAIT_ACK_SET_CONF_INTERF: |
| 2048 | ep_warn(ep, "should never get in %s state here!!!\n", |
| 2049 | EP0_STNAME(ep->dev)); |
| 2050 | ep0_idle(udc); |
| 2051 | break; |
| 2052 | } |
| 2053 | } |
| 2054 | |
| 2055 | /** |
| 2056 | * handle_ep - Handle endpoint data tranfers |
| 2057 | * @ep: pxa physical endpoint |
| 2058 | * |
| 2059 | * Tries to transfer all pending request data into the endpoint and/or |
| 2060 | * transfer all pending data in the endpoint into usb requests. |
| 2061 | * |
Robert Jarzmik | 5e23e90 | 2010-01-27 18:38:03 +0100 | [diff] [blame] | 2062 | * Is always called when in_interrupt() and with ep->lock released. |
Robert Jarzmik | d75379a | 2008-04-18 15:56:49 -0700 | [diff] [blame] | 2063 | */ |
| 2064 | static void handle_ep(struct pxa_ep *ep) |
| 2065 | { |
| 2066 | struct pxa27x_request *req; |
| 2067 | int completed; |
| 2068 | u32 udccsr; |
| 2069 | int is_in = ep->dir_in; |
| 2070 | int loop = 0; |
Robert Jarzmik | 5e23e90 | 2010-01-27 18:38:03 +0100 | [diff] [blame] | 2071 | unsigned long flags; |
| 2072 | |
| 2073 | spin_lock_irqsave(&ep->lock, flags); |
| 2074 | if (ep->in_handle_ep) |
| 2075 | goto recursion_detected; |
| 2076 | ep->in_handle_ep = 1; |
Robert Jarzmik | d75379a | 2008-04-18 15:56:49 -0700 | [diff] [blame] | 2077 | |
| 2078 | do { |
| 2079 | completed = 0; |
| 2080 | udccsr = udc_ep_readl(ep, UDCCSR); |
Robert Jarzmik | 5e23e90 | 2010-01-27 18:38:03 +0100 | [diff] [blame] | 2081 | |
Robert Jarzmik | d75379a | 2008-04-18 15:56:49 -0700 | [diff] [blame] | 2082 | if (likely(!list_empty(&ep->queue))) |
| 2083 | req = list_entry(ep->queue.next, |
| 2084 | struct pxa27x_request, queue); |
| 2085 | else |
| 2086 | req = NULL; |
| 2087 | |
| 2088 | ep_dbg(ep, "req:%p, udccsr 0x%03x loop=%d\n", |
| 2089 | req, udccsr, loop++); |
| 2090 | |
| 2091 | if (unlikely(udccsr & (UDCCSR_SST | UDCCSR_TRN))) |
| 2092 | udc_ep_writel(ep, UDCCSR, |
| 2093 | udccsr & (UDCCSR_SST | UDCCSR_TRN)); |
| 2094 | if (!req) |
| 2095 | break; |
| 2096 | |
| 2097 | if (unlikely(is_in)) { |
| 2098 | if (likely(!ep_is_full(ep))) |
| 2099 | completed = write_fifo(ep, req); |
Robert Jarzmik | d75379a | 2008-04-18 15:56:49 -0700 | [diff] [blame] | 2100 | } else { |
| 2101 | if (likely(epout_has_pkt(ep))) |
| 2102 | completed = read_fifo(ep, req); |
Robert Jarzmik | 5e23e90 | 2010-01-27 18:38:03 +0100 | [diff] [blame] | 2103 | } |
| 2104 | |
| 2105 | if (completed) { |
| 2106 | if (is_in) |
| 2107 | ep_end_in_req(ep, req, &flags); |
| 2108 | else |
| 2109 | ep_end_out_req(ep, req, &flags); |
Robert Jarzmik | d75379a | 2008-04-18 15:56:49 -0700 | [diff] [blame] | 2110 | } |
| 2111 | } while (completed); |
Robert Jarzmik | 5e23e90 | 2010-01-27 18:38:03 +0100 | [diff] [blame] | 2112 | |
| 2113 | ep->in_handle_ep = 0; |
| 2114 | recursion_detected: |
| 2115 | spin_unlock_irqrestore(&ep->lock, flags); |
Robert Jarzmik | d75379a | 2008-04-18 15:56:49 -0700 | [diff] [blame] | 2116 | } |
| 2117 | |
| 2118 | /** |
| 2119 | * pxa27x_change_configuration - Handle SET_CONF usb request notification |
| 2120 | * @udc: udc device |
| 2121 | * @config: usb configuration |
| 2122 | * |
| 2123 | * Post the request to upper level. |
| 2124 | * Don't use any pxa specific harware configuration capabilities |
| 2125 | */ |
| 2126 | static void pxa27x_change_configuration(struct pxa_udc *udc, int config) |
| 2127 | { |
| 2128 | struct usb_ctrlrequest req ; |
| 2129 | |
| 2130 | dev_dbg(udc->dev, "config=%d\n", config); |
| 2131 | |
| 2132 | udc->config = config; |
| 2133 | udc->last_interface = 0; |
| 2134 | udc->last_alternate = 0; |
| 2135 | |
| 2136 | req.bRequestType = 0; |
| 2137 | req.bRequest = USB_REQ_SET_CONFIGURATION; |
| 2138 | req.wValue = config; |
| 2139 | req.wIndex = 0; |
| 2140 | req.wLength = 0; |
| 2141 | |
| 2142 | set_ep0state(udc, WAIT_ACK_SET_CONF_INTERF); |
| 2143 | udc->driver->setup(&udc->gadget, &req); |
Robert Jarzmik | 367815e | 2009-04-21 20:41:03 -0700 | [diff] [blame] | 2144 | ep_write_UDCCSR(&udc->pxa_ep[0], UDCCSR0_AREN); |
Robert Jarzmik | d75379a | 2008-04-18 15:56:49 -0700 | [diff] [blame] | 2145 | } |
| 2146 | |
| 2147 | /** |
| 2148 | * pxa27x_change_interface - Handle SET_INTERF usb request notification |
| 2149 | * @udc: udc device |
| 2150 | * @iface: interface number |
| 2151 | * @alt: alternate setting number |
| 2152 | * |
| 2153 | * Post the request to upper level. |
| 2154 | * Don't use any pxa specific harware configuration capabilities |
| 2155 | */ |
| 2156 | static void pxa27x_change_interface(struct pxa_udc *udc, int iface, int alt) |
| 2157 | { |
| 2158 | struct usb_ctrlrequest req; |
| 2159 | |
| 2160 | dev_dbg(udc->dev, "interface=%d, alternate setting=%d\n", iface, alt); |
| 2161 | |
| 2162 | udc->last_interface = iface; |
| 2163 | udc->last_alternate = alt; |
| 2164 | |
| 2165 | req.bRequestType = USB_RECIP_INTERFACE; |
| 2166 | req.bRequest = USB_REQ_SET_INTERFACE; |
| 2167 | req.wValue = alt; |
| 2168 | req.wIndex = iface; |
| 2169 | req.wLength = 0; |
| 2170 | |
| 2171 | set_ep0state(udc, WAIT_ACK_SET_CONF_INTERF); |
| 2172 | udc->driver->setup(&udc->gadget, &req); |
Robert Jarzmik | 367815e | 2009-04-21 20:41:03 -0700 | [diff] [blame] | 2173 | ep_write_UDCCSR(&udc->pxa_ep[0], UDCCSR0_AREN); |
Robert Jarzmik | d75379a | 2008-04-18 15:56:49 -0700 | [diff] [blame] | 2174 | } |
| 2175 | |
| 2176 | /* |
| 2177 | * irq_handle_data - Handle data transfer |
| 2178 | * @irq: irq IRQ number |
| 2179 | * @udc: dev pxa_udc device structure |
| 2180 | * |
| 2181 | * Called from irq handler, transferts data to or from endpoint to queue |
| 2182 | */ |
| 2183 | static void irq_handle_data(int irq, struct pxa_udc *udc) |
| 2184 | { |
| 2185 | int i; |
| 2186 | struct pxa_ep *ep; |
| 2187 | u32 udcisr0 = udc_readl(udc, UDCISR0) & UDCCISR0_EP_MASK; |
| 2188 | u32 udcisr1 = udc_readl(udc, UDCISR1) & UDCCISR1_EP_MASK; |
| 2189 | |
| 2190 | if (udcisr0 & UDCISR_INT_MASK) { |
| 2191 | udc->pxa_ep[0].stats.irqs++; |
| 2192 | udc_writel(udc, UDCISR0, UDCISR_INT(0, UDCISR_INT_MASK)); |
| 2193 | handle_ep0(udc, !!(udcisr0 & UDCICR_FIFOERR), |
| 2194 | !!(udcisr0 & UDCICR_PKTCOMPL)); |
| 2195 | } |
| 2196 | |
| 2197 | udcisr0 >>= 2; |
| 2198 | for (i = 1; udcisr0 != 0 && i < 16; udcisr0 >>= 2, i++) { |
| 2199 | if (!(udcisr0 & UDCISR_INT_MASK)) |
| 2200 | continue; |
| 2201 | |
| 2202 | udc_writel(udc, UDCISR0, UDCISR_INT(i, UDCISR_INT_MASK)); |
Enrico Scholz | 4fdb31d | 2009-10-11 11:52:48 +0200 | [diff] [blame] | 2203 | |
| 2204 | WARN_ON(i >= ARRAY_SIZE(udc->pxa_ep)); |
| 2205 | if (i < ARRAY_SIZE(udc->pxa_ep)) { |
| 2206 | ep = &udc->pxa_ep[i]; |
| 2207 | ep->stats.irqs++; |
| 2208 | handle_ep(ep); |
| 2209 | } |
Robert Jarzmik | d75379a | 2008-04-18 15:56:49 -0700 | [diff] [blame] | 2210 | } |
| 2211 | |
| 2212 | for (i = 16; udcisr1 != 0 && i < 24; udcisr1 >>= 2, i++) { |
| 2213 | udc_writel(udc, UDCISR1, UDCISR_INT(i - 16, UDCISR_INT_MASK)); |
| 2214 | if (!(udcisr1 & UDCISR_INT_MASK)) |
| 2215 | continue; |
| 2216 | |
Enrico Scholz | 4fdb31d | 2009-10-11 11:52:48 +0200 | [diff] [blame] | 2217 | WARN_ON(i >= ARRAY_SIZE(udc->pxa_ep)); |
| 2218 | if (i < ARRAY_SIZE(udc->pxa_ep)) { |
| 2219 | ep = &udc->pxa_ep[i]; |
| 2220 | ep->stats.irqs++; |
| 2221 | handle_ep(ep); |
| 2222 | } |
Robert Jarzmik | d75379a | 2008-04-18 15:56:49 -0700 | [diff] [blame] | 2223 | } |
| 2224 | |
| 2225 | } |
| 2226 | |
| 2227 | /** |
| 2228 | * irq_udc_suspend - Handle IRQ "UDC Suspend" |
| 2229 | * @udc: udc device |
| 2230 | */ |
| 2231 | static void irq_udc_suspend(struct pxa_udc *udc) |
| 2232 | { |
| 2233 | udc_writel(udc, UDCISR1, UDCISR1_IRSU); |
| 2234 | udc->stats.irqs_suspend++; |
| 2235 | |
| 2236 | if (udc->gadget.speed != USB_SPEED_UNKNOWN |
| 2237 | && udc->driver && udc->driver->suspend) |
| 2238 | udc->driver->suspend(&udc->gadget); |
| 2239 | ep0_idle(udc); |
| 2240 | } |
| 2241 | |
| 2242 | /** |
| 2243 | * irq_udc_resume - Handle IRQ "UDC Resume" |
| 2244 | * @udc: udc device |
| 2245 | */ |
| 2246 | static void irq_udc_resume(struct pxa_udc *udc) |
| 2247 | { |
| 2248 | udc_writel(udc, UDCISR1, UDCISR1_IRRU); |
| 2249 | udc->stats.irqs_resume++; |
| 2250 | |
| 2251 | if (udc->gadget.speed != USB_SPEED_UNKNOWN |
| 2252 | && udc->driver && udc->driver->resume) |
| 2253 | udc->driver->resume(&udc->gadget); |
| 2254 | } |
| 2255 | |
| 2256 | /** |
| 2257 | * irq_udc_reconfig - Handle IRQ "UDC Change Configuration" |
| 2258 | * @udc: udc device |
| 2259 | */ |
| 2260 | static void irq_udc_reconfig(struct pxa_udc *udc) |
| 2261 | { |
| 2262 | unsigned config, interface, alternate, config_change; |
| 2263 | u32 udccr = udc_readl(udc, UDCCR); |
| 2264 | |
| 2265 | udc_writel(udc, UDCISR1, UDCISR1_IRCC); |
| 2266 | udc->stats.irqs_reconfig++; |
| 2267 | |
| 2268 | config = (udccr & UDCCR_ACN) >> UDCCR_ACN_S; |
| 2269 | config_change = (config != udc->config); |
| 2270 | pxa27x_change_configuration(udc, config); |
| 2271 | |
| 2272 | interface = (udccr & UDCCR_AIN) >> UDCCR_AIN_S; |
| 2273 | alternate = (udccr & UDCCR_AAISN) >> UDCCR_AAISN_S; |
| 2274 | pxa27x_change_interface(udc, interface, alternate); |
| 2275 | |
| 2276 | if (config_change) |
| 2277 | update_pxa_ep_matches(udc); |
| 2278 | udc_set_mask_UDCCR(udc, UDCCR_SMAC); |
| 2279 | } |
| 2280 | |
| 2281 | /** |
| 2282 | * irq_udc_reset - Handle IRQ "UDC Reset" |
| 2283 | * @udc: udc device |
| 2284 | */ |
| 2285 | static void irq_udc_reset(struct pxa_udc *udc) |
| 2286 | { |
| 2287 | u32 udccr = udc_readl(udc, UDCCR); |
| 2288 | struct pxa_ep *ep = &udc->pxa_ep[0]; |
| 2289 | |
| 2290 | dev_info(udc->dev, "USB reset\n"); |
| 2291 | udc_writel(udc, UDCISR1, UDCISR1_IRRS); |
| 2292 | udc->stats.irqs_reset++; |
| 2293 | |
| 2294 | if ((udccr & UDCCR_UDA) == 0) { |
| 2295 | dev_dbg(udc->dev, "USB reset start\n"); |
Arnd Bergmann | b89e5f1 | 2016-06-16 13:38:25 +0200 | [diff] [blame] | 2296 | stop_activity(udc); |
Robert Jarzmik | d75379a | 2008-04-18 15:56:49 -0700 | [diff] [blame] | 2297 | } |
| 2298 | udc->gadget.speed = USB_SPEED_FULL; |
| 2299 | memset(&udc->stats, 0, sizeof udc->stats); |
| 2300 | |
| 2301 | nuke(ep, -EPROTO); |
Robert Jarzmik | 367815e | 2009-04-21 20:41:03 -0700 | [diff] [blame] | 2302 | ep_write_UDCCSR(ep, UDCCSR0_FTF | UDCCSR0_OPC); |
Robert Jarzmik | d75379a | 2008-04-18 15:56:49 -0700 | [diff] [blame] | 2303 | ep0_idle(udc); |
| 2304 | } |
| 2305 | |
| 2306 | /** |
| 2307 | * pxa_udc_irq - Main irq handler |
| 2308 | * @irq: irq number |
| 2309 | * @_dev: udc device |
| 2310 | * |
| 2311 | * Handles all udc interrupts |
| 2312 | */ |
| 2313 | static irqreturn_t pxa_udc_irq(int irq, void *_dev) |
| 2314 | { |
| 2315 | struct pxa_udc *udc = _dev; |
| 2316 | u32 udcisr0 = udc_readl(udc, UDCISR0); |
| 2317 | u32 udcisr1 = udc_readl(udc, UDCISR1); |
| 2318 | u32 udccr = udc_readl(udc, UDCCR); |
| 2319 | u32 udcisr1_spec; |
| 2320 | |
| 2321 | dev_vdbg(udc->dev, "Interrupt, UDCISR0:0x%08x, UDCISR1:0x%08x, " |
| 2322 | "UDCCR:0x%08x\n", udcisr0, udcisr1, udccr); |
| 2323 | |
| 2324 | udcisr1_spec = udcisr1 & 0xf8000000; |
| 2325 | if (unlikely(udcisr1_spec & UDCISR1_IRSU)) |
| 2326 | irq_udc_suspend(udc); |
| 2327 | if (unlikely(udcisr1_spec & UDCISR1_IRRU)) |
| 2328 | irq_udc_resume(udc); |
| 2329 | if (unlikely(udcisr1_spec & UDCISR1_IRCC)) |
| 2330 | irq_udc_reconfig(udc); |
| 2331 | if (unlikely(udcisr1_spec & UDCISR1_IRRS)) |
| 2332 | irq_udc_reset(udc); |
| 2333 | |
| 2334 | if ((udcisr0 & UDCCISR0_EP_MASK) | (udcisr1 & UDCCISR1_EP_MASK)) |
| 2335 | irq_handle_data(irq, udc); |
| 2336 | |
| 2337 | return IRQ_HANDLED; |
| 2338 | } |
| 2339 | |
| 2340 | static struct pxa_udc memory = { |
| 2341 | .gadget = { |
| 2342 | .ops = &pxa_udc_ops, |
| 2343 | .ep0 = &memory.udc_usb_ep[0].usb_ep, |
| 2344 | .name = driver_name, |
| 2345 | .dev = { |
Kay Sievers | c682b17 | 2009-01-06 10:44:42 -0800 | [diff] [blame] | 2346 | .init_name = "gadget", |
Robert Jarzmik | d75379a | 2008-04-18 15:56:49 -0700 | [diff] [blame] | 2347 | }, |
| 2348 | }, |
| 2349 | |
| 2350 | .udc_usb_ep = { |
| 2351 | USB_EP_CTRL, |
| 2352 | USB_EP_OUT_BULK(1), |
| 2353 | USB_EP_IN_BULK(2), |
| 2354 | USB_EP_IN_ISO(3), |
| 2355 | USB_EP_OUT_ISO(4), |
| 2356 | USB_EP_IN_INT(5), |
| 2357 | }, |
| 2358 | |
| 2359 | .pxa_ep = { |
| 2360 | PXA_EP_CTRL, |
| 2361 | /* Endpoints for gadget zero */ |
| 2362 | PXA_EP_OUT_BULK(1, 1, 3, 0, 0), |
| 2363 | PXA_EP_IN_BULK(2, 2, 3, 0, 0), |
| 2364 | /* Endpoints for ether gadget, file storage gadget */ |
| 2365 | PXA_EP_OUT_BULK(3, 1, 1, 0, 0), |
| 2366 | PXA_EP_IN_BULK(4, 2, 1, 0, 0), |
| 2367 | PXA_EP_IN_ISO(5, 3, 1, 0, 0), |
| 2368 | PXA_EP_OUT_ISO(6, 4, 1, 0, 0), |
| 2369 | PXA_EP_IN_INT(7, 5, 1, 0, 0), |
| 2370 | /* Endpoints for RNDIS, serial */ |
| 2371 | PXA_EP_OUT_BULK(8, 1, 2, 0, 0), |
| 2372 | PXA_EP_IN_BULK(9, 2, 2, 0, 0), |
| 2373 | PXA_EP_IN_INT(10, 5, 2, 0, 0), |
| 2374 | /* |
| 2375 | * All the following endpoints are only for completion. They |
| 2376 | * won't never work, as multiple interfaces are really broken on |
| 2377 | * the pxa. |
| 2378 | */ |
| 2379 | PXA_EP_OUT_BULK(11, 1, 2, 1, 0), |
| 2380 | PXA_EP_IN_BULK(12, 2, 2, 1, 0), |
| 2381 | /* Endpoint for CDC Ether */ |
| 2382 | PXA_EP_OUT_BULK(13, 1, 1, 1, 1), |
| 2383 | PXA_EP_IN_BULK(14, 2, 1, 1, 1), |
| 2384 | } |
| 2385 | }; |
| 2386 | |
Robert Jarzmik | 004f7d4 | 2014-10-29 21:58:33 +0100 | [diff] [blame] | 2387 | #if defined(CONFIG_OF) |
Fabian Frederick | 3463d79 | 2015-03-16 20:20:27 +0100 | [diff] [blame] | 2388 | static const struct of_device_id udc_pxa_dt_ids[] = { |
Robert Jarzmik | 1803fe1 | 2014-10-01 22:06:16 +0200 | [diff] [blame] | 2389 | { .compatible = "marvell,pxa270-udc" }, |
| 2390 | {} |
| 2391 | }; |
| 2392 | MODULE_DEVICE_TABLE(of, udc_pxa_dt_ids); |
Robert Jarzmik | 004f7d4 | 2014-10-29 21:58:33 +0100 | [diff] [blame] | 2393 | #endif |
Robert Jarzmik | 1803fe1 | 2014-10-01 22:06:16 +0200 | [diff] [blame] | 2394 | |
Robert Jarzmik | d75379a | 2008-04-18 15:56:49 -0700 | [diff] [blame] | 2395 | /** |
| 2396 | * pxa_udc_probe - probes the udc device |
| 2397 | * @_dev: platform device |
| 2398 | * |
| 2399 | * Perform basic init : allocates udc clock, creates sysfs files, requests |
| 2400 | * irq. |
| 2401 | */ |
Felipe Balbi | ef222cb | 2013-02-25 09:47:50 +0200 | [diff] [blame] | 2402 | static int pxa_udc_probe(struct platform_device *pdev) |
Robert Jarzmik | d75379a | 2008-04-18 15:56:49 -0700 | [diff] [blame] | 2403 | { |
| 2404 | struct resource *regs; |
| 2405 | struct pxa_udc *udc = &memory; |
Robert Jarzmik | eb50702 | 2009-01-24 23:55:34 -0800 | [diff] [blame] | 2406 | int retval = 0, gpio; |
Robert Jarzmik | 2db88a7 | 2014-10-01 22:06:14 +0200 | [diff] [blame] | 2407 | struct pxa2xx_udc_mach_info *mach = dev_get_platdata(&pdev->dev); |
| 2408 | unsigned long gpio_flags; |
| 2409 | |
| 2410 | if (mach) { |
| 2411 | gpio_flags = mach->gpio_pullup_inverted ? GPIOF_ACTIVE_LOW : 0; |
| 2412 | gpio = mach->gpio_pullup; |
| 2413 | if (gpio_is_valid(gpio)) { |
| 2414 | retval = devm_gpio_request_one(&pdev->dev, gpio, |
| 2415 | gpio_flags, |
| 2416 | "USB D+ pullup"); |
| 2417 | if (retval) |
| 2418 | return retval; |
| 2419 | udc->gpiod = gpio_to_desc(mach->gpio_pullup); |
| 2420 | } |
Robert Jarzmik | 3ec8347 | 2014-10-01 22:06:15 +0200 | [diff] [blame] | 2421 | udc->udc_command = mach->udc_command; |
Robert Jarzmik | 1803fe1 | 2014-10-01 22:06:16 +0200 | [diff] [blame] | 2422 | } else { |
Uwe Kleine-König | 88167fc | 2015-07-06 11:09:49 +0200 | [diff] [blame] | 2423 | udc->gpiod = devm_gpiod_get(&pdev->dev, NULL, GPIOD_ASIS); |
Robert Jarzmik | 2db88a7 | 2014-10-01 22:06:14 +0200 | [diff] [blame] | 2424 | } |
Robert Jarzmik | d75379a | 2008-04-18 15:56:49 -0700 | [diff] [blame] | 2425 | |
| 2426 | regs = platform_get_resource(pdev, IORESOURCE_MEM, 0); |
Robert Jarzmik | 95fcc6a | 2014-10-17 22:43:05 +0200 | [diff] [blame] | 2427 | udc->regs = devm_ioremap_resource(&pdev->dev, regs); |
| 2428 | if (IS_ERR(udc->regs)) |
| 2429 | return PTR_ERR(udc->regs); |
Robert Jarzmik | d75379a | 2008-04-18 15:56:49 -0700 | [diff] [blame] | 2430 | udc->irq = platform_get_irq(pdev, 0); |
| 2431 | if (udc->irq < 0) |
| 2432 | return udc->irq; |
| 2433 | |
| 2434 | udc->dev = &pdev->dev; |
Kishon Vijay Abraham I | 662dca5 | 2012-06-22 17:02:46 +0530 | [diff] [blame] | 2435 | udc->transceiver = usb_get_phy(USB_PHY_TYPE_USB2); |
Robert Jarzmik | d75379a | 2008-04-18 15:56:49 -0700 | [diff] [blame] | 2436 | |
Robert Jarzmik | 2db88a7 | 2014-10-01 22:06:14 +0200 | [diff] [blame] | 2437 | if (IS_ERR(udc->gpiod)) { |
| 2438 | dev_err(&pdev->dev, "Couldn't find or request D+ gpio : %ld\n", |
| 2439 | PTR_ERR(udc->gpiod)); |
| 2440 | return PTR_ERR(udc->gpiod); |
Robert Jarzmik | eb50702 | 2009-01-24 23:55:34 -0800 | [diff] [blame] | 2441 | } |
Robert Jarzmik | 2db88a7 | 2014-10-01 22:06:14 +0200 | [diff] [blame] | 2442 | if (udc->gpiod) |
| 2443 | gpiod_direction_output(udc->gpiod, 0); |
Robert Jarzmik | eb50702 | 2009-01-24 23:55:34 -0800 | [diff] [blame] | 2444 | |
Robert Jarzmik | 95fcc6a | 2014-10-17 22:43:05 +0200 | [diff] [blame] | 2445 | udc->clk = devm_clk_get(&pdev->dev, NULL); |
| 2446 | if (IS_ERR(udc->clk)) |
| 2447 | return PTR_ERR(udc->clk); |
| 2448 | |
Robert Jarzmik | e176475 | 2014-06-29 16:01:10 +0200 | [diff] [blame] | 2449 | retval = clk_prepare(udc->clk); |
| 2450 | if (retval) |
Robert Jarzmik | 95fcc6a | 2014-10-17 22:43:05 +0200 | [diff] [blame] | 2451 | return retval; |
Robert Jarzmik | d75379a | 2008-04-18 15:56:49 -0700 | [diff] [blame] | 2452 | |
Robert Jarzmik | b799a7e | 2009-01-24 23:56:42 -0800 | [diff] [blame] | 2453 | udc->vbus_sensed = 0; |
Robert Jarzmik | d75379a | 2008-04-18 15:56:49 -0700 | [diff] [blame] | 2454 | |
| 2455 | the_controller = udc; |
| 2456 | platform_set_drvdata(pdev, udc); |
| 2457 | udc_init_data(udc); |
Robert Jarzmik | d75379a | 2008-04-18 15:56:49 -0700 | [diff] [blame] | 2458 | |
| 2459 | /* irq setup after old hardware state is cleaned up */ |
Robert Jarzmik | 95fcc6a | 2014-10-17 22:43:05 +0200 | [diff] [blame] | 2460 | retval = devm_request_irq(&pdev->dev, udc->irq, pxa_udc_irq, |
| 2461 | IRQF_SHARED, driver_name, udc); |
Robert Jarzmik | d75379a | 2008-04-18 15:56:49 -0700 | [diff] [blame] | 2462 | if (retval != 0) { |
| 2463 | dev_err(udc->dev, "%s: can't get irq %i, err %d\n", |
Rob Herring | ef61440 | 2012-08-28 15:05:08 -0500 | [diff] [blame] | 2464 | driver_name, udc->irq, retval); |
Robert Jarzmik | 95fcc6a | 2014-10-17 22:43:05 +0200 | [diff] [blame] | 2465 | goto err; |
Robert Jarzmik | d75379a | 2008-04-18 15:56:49 -0700 | [diff] [blame] | 2466 | } |
Felipe Balbi | fe2a429 | 2013-02-25 08:49:05 +0200 | [diff] [blame] | 2467 | |
Sebastian Andrzej Siewior | 0f91349 | 2011-06-28 16:33:47 +0300 | [diff] [blame] | 2468 | retval = usb_add_gadget_udc(&pdev->dev, &udc->gadget); |
| 2469 | if (retval) |
Robert Jarzmik | 95fcc6a | 2014-10-17 22:43:05 +0200 | [diff] [blame] | 2470 | goto err; |
Robert Jarzmik | d75379a | 2008-04-18 15:56:49 -0700 | [diff] [blame] | 2471 | |
| 2472 | pxa_init_debugfs(udc); |
Robert Jarzmik | f4fd094 | 2014-10-17 22:43:06 +0200 | [diff] [blame] | 2473 | if (should_enable_udc(udc)) |
| 2474 | udc_enable(udc); |
Robert Jarzmik | d75379a | 2008-04-18 15:56:49 -0700 | [diff] [blame] | 2475 | return 0; |
Robert Jarzmik | 95fcc6a | 2014-10-17 22:43:05 +0200 | [diff] [blame] | 2476 | err: |
Robert Jarzmik | e176475 | 2014-06-29 16:01:10 +0200 | [diff] [blame] | 2477 | clk_unprepare(udc->clk); |
Robert Jarzmik | d75379a | 2008-04-18 15:56:49 -0700 | [diff] [blame] | 2478 | return retval; |
| 2479 | } |
| 2480 | |
| 2481 | /** |
| 2482 | * pxa_udc_remove - removes the udc device driver |
| 2483 | * @_dev: platform device |
| 2484 | */ |
Felipe Balbi | 50757b2 | 2013-04-02 17:13:40 +0300 | [diff] [blame] | 2485 | static int pxa_udc_remove(struct platform_device *_dev) |
Robert Jarzmik | d75379a | 2008-04-18 15:56:49 -0700 | [diff] [blame] | 2486 | { |
| 2487 | struct pxa_udc *udc = platform_get_drvdata(_dev); |
| 2488 | |
Sebastian Andrzej Siewior | 0f91349 | 2011-06-28 16:33:47 +0300 | [diff] [blame] | 2489 | usb_del_gadget_udc(&udc->gadget); |
Robert Jarzmik | d75379a | 2008-04-18 15:56:49 -0700 | [diff] [blame] | 2490 | pxa_cleanup_debugfs(udc); |
| 2491 | |
Kishon Vijay Abraham I | 721002e | 2012-06-22 17:02:45 +0530 | [diff] [blame] | 2492 | usb_put_phy(udc->transceiver); |
Robert Jarzmik | 7fec3c2 | 2009-01-24 23:57:30 -0800 | [diff] [blame] | 2493 | |
| 2494 | udc->transceiver = NULL; |
Robert Jarzmik | d75379a | 2008-04-18 15:56:49 -0700 | [diff] [blame] | 2495 | the_controller = NULL; |
Robert Jarzmik | e176475 | 2014-06-29 16:01:10 +0200 | [diff] [blame] | 2496 | clk_unprepare(udc->clk); |
Robert Jarzmik | d75379a | 2008-04-18 15:56:49 -0700 | [diff] [blame] | 2497 | |
| 2498 | return 0; |
| 2499 | } |
| 2500 | |
| 2501 | static void pxa_udc_shutdown(struct platform_device *_dev) |
| 2502 | { |
| 2503 | struct pxa_udc *udc = platform_get_drvdata(_dev); |
| 2504 | |
Robert Jarzmik | 5a59bc5 | 2008-05-12 10:47:56 -0700 | [diff] [blame] | 2505 | if (udc_readl(udc, UDCCR) & UDCCR_UDE) |
| 2506 | udc_disable(udc); |
Robert Jarzmik | d75379a | 2008-04-18 15:56:49 -0700 | [diff] [blame] | 2507 | } |
| 2508 | |
Eric Miao | 59376cc | 2010-07-14 21:17:25 +0800 | [diff] [blame] | 2509 | #ifdef CONFIG_PXA27x |
David Brownell | f6d529f | 2009-04-21 20:34:24 -0700 | [diff] [blame] | 2510 | extern void pxa27x_clear_otgph(void); |
| 2511 | #else |
| 2512 | #define pxa27x_clear_otgph() do {} while (0) |
| 2513 | #endif |
| 2514 | |
Robert Jarzmik | d75379a | 2008-04-18 15:56:49 -0700 | [diff] [blame] | 2515 | #ifdef CONFIG_PM |
| 2516 | /** |
| 2517 | * pxa_udc_suspend - Suspend udc device |
| 2518 | * @_dev: platform device |
| 2519 | * @state: suspend state |
| 2520 | * |
| 2521 | * Suspends udc : saves configuration registers (UDCCR*), then disables the udc |
| 2522 | * device. |
| 2523 | */ |
| 2524 | static int pxa_udc_suspend(struct platform_device *_dev, pm_message_t state) |
| 2525 | { |
Robert Jarzmik | d75379a | 2008-04-18 15:56:49 -0700 | [diff] [blame] | 2526 | struct pxa_udc *udc = platform_get_drvdata(_dev); |
| 2527 | struct pxa_ep *ep; |
| 2528 | |
| 2529 | ep = &udc->pxa_ep[0]; |
| 2530 | udc->udccsr0 = udc_ep_readl(ep, UDCCSR); |
Robert Jarzmik | d75379a | 2008-04-18 15:56:49 -0700 | [diff] [blame] | 2531 | |
| 2532 | udc_disable(udc); |
Robert Jarzmik | eb50702 | 2009-01-24 23:55:34 -0800 | [diff] [blame] | 2533 | udc->pullup_resume = udc->pullup_on; |
| 2534 | dplus_pullup(udc, 0); |
Robert Jarzmik | d75379a | 2008-04-18 15:56:49 -0700 | [diff] [blame] | 2535 | |
Felipe Balbi | 391e6dc | 2015-11-18 17:06:00 -0600 | [diff] [blame] | 2536 | if (udc->driver) |
| 2537 | udc->driver->disconnect(&udc->gadget); |
| 2538 | |
Robert Jarzmik | d75379a | 2008-04-18 15:56:49 -0700 | [diff] [blame] | 2539 | return 0; |
| 2540 | } |
| 2541 | |
| 2542 | /** |
| 2543 | * pxa_udc_resume - Resume udc device |
| 2544 | * @_dev: platform device |
| 2545 | * |
| 2546 | * Resumes udc : restores configuration registers (UDCCR*), then enables the udc |
| 2547 | * device. |
| 2548 | */ |
| 2549 | static int pxa_udc_resume(struct platform_device *_dev) |
| 2550 | { |
Robert Jarzmik | d75379a | 2008-04-18 15:56:49 -0700 | [diff] [blame] | 2551 | struct pxa_udc *udc = platform_get_drvdata(_dev); |
| 2552 | struct pxa_ep *ep; |
| 2553 | |
| 2554 | ep = &udc->pxa_ep[0]; |
| 2555 | udc_ep_writel(ep, UDCCSR, udc->udccsr0 & (UDCCSR0_FST | UDCCSR0_DME)); |
Robert Jarzmik | d75379a | 2008-04-18 15:56:49 -0700 | [diff] [blame] | 2556 | |
Robert Jarzmik | eb50702 | 2009-01-24 23:55:34 -0800 | [diff] [blame] | 2557 | dplus_pullup(udc, udc->pullup_resume); |
| 2558 | if (should_enable_udc(udc)) |
| 2559 | udc_enable(udc); |
Robert Jarzmik | d75379a | 2008-04-18 15:56:49 -0700 | [diff] [blame] | 2560 | /* |
| 2561 | * We do not handle OTG yet. |
| 2562 | * |
| 2563 | * OTGPH bit is set when sleep mode is entered. |
| 2564 | * it indicates that OTG pad is retaining its state. |
| 2565 | * Upon exit from sleep mode and before clearing OTGPH, |
| 2566 | * Software must configure the USB OTG pad, UDC, and UHC |
| 2567 | * to the state they were in before entering sleep mode. |
Robert Jarzmik | d75379a | 2008-04-18 15:56:49 -0700 | [diff] [blame] | 2568 | */ |
David Brownell | f6d529f | 2009-04-21 20:34:24 -0700 | [diff] [blame] | 2569 | pxa27x_clear_otgph(); |
Robert Jarzmik | d75379a | 2008-04-18 15:56:49 -0700 | [diff] [blame] | 2570 | |
| 2571 | return 0; |
| 2572 | } |
| 2573 | #endif |
| 2574 | |
| 2575 | /* work with hotplug and coldplug */ |
Philipp Zabel | 7a85762 | 2008-06-22 23:36:39 +0100 | [diff] [blame] | 2576 | MODULE_ALIAS("platform:pxa27x-udc"); |
Robert Jarzmik | d75379a | 2008-04-18 15:56:49 -0700 | [diff] [blame] | 2577 | |
| 2578 | static struct platform_driver udc_driver = { |
| 2579 | .driver = { |
Philipp Zabel | 7a85762 | 2008-06-22 23:36:39 +0100 | [diff] [blame] | 2580 | .name = "pxa27x-udc", |
Robert Jarzmik | 1803fe1 | 2014-10-01 22:06:16 +0200 | [diff] [blame] | 2581 | .of_match_table = of_match_ptr(udc_pxa_dt_ids), |
Robert Jarzmik | d75379a | 2008-04-18 15:56:49 -0700 | [diff] [blame] | 2582 | }, |
Felipe Balbi | ef222cb | 2013-02-25 09:47:50 +0200 | [diff] [blame] | 2583 | .probe = pxa_udc_probe, |
Felipe Balbi | 50757b2 | 2013-04-02 17:13:40 +0300 | [diff] [blame] | 2584 | .remove = pxa_udc_remove, |
Robert Jarzmik | d75379a | 2008-04-18 15:56:49 -0700 | [diff] [blame] | 2585 | .shutdown = pxa_udc_shutdown, |
| 2586 | #ifdef CONFIG_PM |
| 2587 | .suspend = pxa_udc_suspend, |
| 2588 | .resume = pxa_udc_resume |
| 2589 | #endif |
| 2590 | }; |
| 2591 | |
Felipe Balbi | ef222cb | 2013-02-25 09:47:50 +0200 | [diff] [blame] | 2592 | module_platform_driver(udc_driver); |
Robert Jarzmik | d75379a | 2008-04-18 15:56:49 -0700 | [diff] [blame] | 2593 | |
| 2594 | MODULE_DESCRIPTION(DRIVER_DESC); |
| 2595 | MODULE_AUTHOR("Robert Jarzmik"); |
| 2596 | MODULE_LICENSE("GPL"); |