Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * linux/drivers/usb/gadget/lh7a40x_udc.c |
| 3 | * Sharp LH7A40x on-chip full speed USB device controllers |
| 4 | * |
| 5 | * Copyright (C) 2004 Mikko Lahteenmaki, Nordic ID |
| 6 | * Copyright (C) 2004 Bo Henriksen, Nordic ID |
| 7 | * |
| 8 | * This program is free software; you can redistribute it and/or modify |
| 9 | * it under the terms of the GNU General Public License as published by |
| 10 | * the Free Software Foundation; either version 2 of the License, or |
| 11 | * (at your option) any later version. |
| 12 | * |
| 13 | * This program is distributed in the hope that it will be useful, |
| 14 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 16 | * GNU General Public License for more details. |
| 17 | * |
| 18 | * You should have received a copy of the GNU General Public License |
| 19 | * along with this program; if not, write to the Free Software |
| 20 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
| 21 | * |
| 22 | */ |
| 23 | |
Russell King | d052d1b | 2005-10-29 19:07:23 +0100 | [diff] [blame] | 24 | #include <linux/platform_device.h> |
| 25 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 26 | #include "lh7a40x_udc.h" |
| 27 | |
| 28 | //#define DEBUG printk |
| 29 | //#define DEBUG_EP0 printk |
| 30 | //#define DEBUG_SETUP printk |
| 31 | |
| 32 | #ifndef DEBUG_EP0 |
| 33 | # define DEBUG_EP0(fmt,args...) |
| 34 | #endif |
| 35 | #ifndef DEBUG_SETUP |
| 36 | # define DEBUG_SETUP(fmt,args...) |
| 37 | #endif |
| 38 | #ifndef DEBUG |
| 39 | # define NO_STATES |
| 40 | # define DEBUG(fmt,args...) |
| 41 | #endif |
| 42 | |
| 43 | #define DRIVER_DESC "LH7A40x USB Device Controller" |
| 44 | #define DRIVER_VERSION __DATE__ |
| 45 | |
| 46 | #ifndef _BIT /* FIXME - what happended to _BIT in 2.6.7bk18? */ |
| 47 | #define _BIT(x) (1<<(x)) |
| 48 | #endif |
| 49 | |
| 50 | struct lh7a40x_udc *the_controller; |
| 51 | |
| 52 | static const char driver_name[] = "lh7a40x_udc"; |
| 53 | static const char driver_desc[] = DRIVER_DESC; |
| 54 | static const char ep0name[] = "ep0-control"; |
| 55 | |
| 56 | /* |
| 57 | Local definintions. |
| 58 | */ |
| 59 | |
| 60 | #ifndef NO_STATES |
| 61 | static char *state_names[] = { |
| 62 | "WAIT_FOR_SETUP", |
| 63 | "DATA_STATE_XMIT", |
| 64 | "DATA_STATE_NEED_ZLP", |
| 65 | "WAIT_FOR_OUT_STATUS", |
| 66 | "DATA_STATE_RECV" |
| 67 | }; |
| 68 | #endif |
| 69 | |
| 70 | /* |
| 71 | Local declarations. |
| 72 | */ |
| 73 | static int lh7a40x_ep_enable(struct usb_ep *ep, |
| 74 | const struct usb_endpoint_descriptor *); |
| 75 | static int lh7a40x_ep_disable(struct usb_ep *ep); |
Al Viro | 55016f1 | 2005-10-21 03:21:58 -0400 | [diff] [blame] | 76 | static struct usb_request *lh7a40x_alloc_request(struct usb_ep *ep, gfp_t); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 77 | static void lh7a40x_free_request(struct usb_ep *ep, struct usb_request *); |
Al Viro | 55016f1 | 2005-10-21 03:21:58 -0400 | [diff] [blame] | 78 | static int lh7a40x_queue(struct usb_ep *ep, struct usb_request *, gfp_t); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 79 | static int lh7a40x_dequeue(struct usb_ep *ep, struct usb_request *); |
| 80 | static int lh7a40x_set_halt(struct usb_ep *ep, int); |
| 81 | static int lh7a40x_fifo_status(struct usb_ep *ep); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 82 | static void lh7a40x_fifo_flush(struct usb_ep *ep); |
| 83 | static void lh7a40x_ep0_kick(struct lh7a40x_udc *dev, struct lh7a40x_ep *ep); |
| 84 | static void lh7a40x_handle_ep0(struct lh7a40x_udc *dev, u32 intr); |
| 85 | |
| 86 | static void done(struct lh7a40x_ep *ep, struct lh7a40x_request *req, |
| 87 | int status); |
| 88 | static void pio_irq_enable(int bEndpointAddress); |
| 89 | static void pio_irq_disable(int bEndpointAddress); |
| 90 | static void stop_activity(struct lh7a40x_udc *dev, |
| 91 | struct usb_gadget_driver *driver); |
| 92 | static void flush(struct lh7a40x_ep *ep); |
| 93 | static void udc_enable(struct lh7a40x_udc *dev); |
| 94 | static void udc_set_address(struct lh7a40x_udc *dev, unsigned char address); |
| 95 | |
| 96 | static struct usb_ep_ops lh7a40x_ep_ops = { |
| 97 | .enable = lh7a40x_ep_enable, |
| 98 | .disable = lh7a40x_ep_disable, |
| 99 | |
| 100 | .alloc_request = lh7a40x_alloc_request, |
| 101 | .free_request = lh7a40x_free_request, |
| 102 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 103 | .queue = lh7a40x_queue, |
| 104 | .dequeue = lh7a40x_dequeue, |
| 105 | |
| 106 | .set_halt = lh7a40x_set_halt, |
| 107 | .fifo_status = lh7a40x_fifo_status, |
| 108 | .fifo_flush = lh7a40x_fifo_flush, |
| 109 | }; |
| 110 | |
| 111 | /* Inline code */ |
| 112 | |
| 113 | static __inline__ int write_packet(struct lh7a40x_ep *ep, |
| 114 | struct lh7a40x_request *req, int max) |
| 115 | { |
| 116 | u8 *buf; |
| 117 | int length, count; |
| 118 | volatile u32 *fifo = (volatile u32 *)ep->fifo; |
| 119 | |
| 120 | buf = req->req.buf + req->req.actual; |
| 121 | prefetch(buf); |
| 122 | |
| 123 | length = req->req.length - req->req.actual; |
| 124 | length = min(length, max); |
| 125 | req->req.actual += length; |
| 126 | |
| 127 | DEBUG("Write %d (max %d), fifo %p\n", length, max, fifo); |
| 128 | |
| 129 | count = length; |
| 130 | while (count--) { |
| 131 | *fifo = *buf++; |
| 132 | } |
| 133 | |
| 134 | return length; |
| 135 | } |
| 136 | |
| 137 | static __inline__ void usb_set_index(u32 ep) |
| 138 | { |
| 139 | *(volatile u32 *)io_p2v(USB_INDEX) = ep; |
| 140 | } |
| 141 | |
| 142 | static __inline__ u32 usb_read(u32 port) |
| 143 | { |
| 144 | return *(volatile u32 *)io_p2v(port); |
| 145 | } |
| 146 | |
| 147 | static __inline__ void usb_write(u32 val, u32 port) |
| 148 | { |
| 149 | *(volatile u32 *)io_p2v(port) = val; |
| 150 | } |
| 151 | |
| 152 | static __inline__ void usb_set(u32 val, u32 port) |
| 153 | { |
| 154 | volatile u32 *ioport = (volatile u32 *)io_p2v(port); |
| 155 | u32 after = (*ioport) | val; |
| 156 | *ioport = after; |
| 157 | } |
| 158 | |
| 159 | static __inline__ void usb_clear(u32 val, u32 port) |
| 160 | { |
| 161 | volatile u32 *ioport = (volatile u32 *)io_p2v(port); |
| 162 | u32 after = (*ioport) & ~val; |
| 163 | *ioport = after; |
| 164 | } |
| 165 | |
| 166 | /*-------------------------------------------------------------------------*/ |
| 167 | |
| 168 | #define GPIO_PORTC_DR (0x80000E08) |
| 169 | #define GPIO_PORTC_DDR (0x80000E18) |
| 170 | #define GPIO_PORTC_PDR (0x80000E70) |
| 171 | |
| 172 | /* get port C pin data register */ |
| 173 | #define get_portc_pdr(bit) ((usb_read(GPIO_PORTC_PDR) & _BIT(bit)) != 0) |
| 174 | /* get port C data direction register */ |
| 175 | #define get_portc_ddr(bit) ((usb_read(GPIO_PORTC_DDR) & _BIT(bit)) != 0) |
| 176 | /* set port C data register */ |
| 177 | #define set_portc_dr(bit, val) (val ? usb_set(_BIT(bit), GPIO_PORTC_DR) : usb_clear(_BIT(bit), GPIO_PORTC_DR)) |
| 178 | /* set port C data direction register */ |
| 179 | #define set_portc_ddr(bit, val) (val ? usb_set(_BIT(bit), GPIO_PORTC_DDR) : usb_clear(_BIT(bit), GPIO_PORTC_DDR)) |
| 180 | |
| 181 | /* |
| 182 | * LPD7A404 GPIO's: |
| 183 | * Port C bit 1 = USB Port 1 Power Enable |
| 184 | * Port C bit 2 = USB Port 1 Data Carrier Detect |
| 185 | */ |
| 186 | #define is_usb_connected() get_portc_pdr(2) |
| 187 | |
| 188 | #ifdef CONFIG_USB_GADGET_DEBUG_FILES |
| 189 | |
| 190 | static const char proc_node_name[] = "driver/udc"; |
| 191 | |
| 192 | static int |
| 193 | udc_proc_read(char *page, char **start, off_t off, int count, |
| 194 | int *eof, void *_dev) |
| 195 | { |
| 196 | char *buf = page; |
| 197 | struct lh7a40x_udc *dev = _dev; |
| 198 | char *next = buf; |
| 199 | unsigned size = count; |
| 200 | unsigned long flags; |
| 201 | int t; |
| 202 | |
| 203 | if (off != 0) |
| 204 | return 0; |
| 205 | |
| 206 | local_irq_save(flags); |
| 207 | |
| 208 | /* basic device status */ |
| 209 | t = scnprintf(next, size, |
| 210 | DRIVER_DESC "\n" |
| 211 | "%s version: %s\n" |
| 212 | "Gadget driver: %s\n" |
| 213 | "Host: %s\n\n", |
| 214 | driver_name, DRIVER_VERSION, |
| 215 | dev->driver ? dev->driver->driver.name : "(none)", |
| 216 | is_usb_connected()? "full speed" : "disconnected"); |
| 217 | size -= t; |
| 218 | next += t; |
| 219 | |
| 220 | t = scnprintf(next, size, |
| 221 | "GPIO:\n" |
| 222 | " Port C bit 1: %d, dir %d\n" |
| 223 | " Port C bit 2: %d, dir %d\n\n", |
| 224 | get_portc_pdr(1), get_portc_ddr(1), |
| 225 | get_portc_pdr(2), get_portc_ddr(2) |
| 226 | ); |
| 227 | size -= t; |
| 228 | next += t; |
| 229 | |
| 230 | t = scnprintf(next, size, |
| 231 | "DCP pullup: %d\n\n", |
| 232 | (usb_read(USB_PM) & PM_USB_DCP) != 0); |
| 233 | size -= t; |
| 234 | next += t; |
| 235 | |
| 236 | local_irq_restore(flags); |
| 237 | *eof = 1; |
| 238 | return count - size; |
| 239 | } |
| 240 | |
| 241 | #define create_proc_files() create_proc_read_entry(proc_node_name, 0, NULL, udc_proc_read, dev) |
| 242 | #define remove_proc_files() remove_proc_entry(proc_node_name, NULL) |
| 243 | |
| 244 | #else /* !CONFIG_USB_GADGET_DEBUG_FILES */ |
| 245 | |
| 246 | #define create_proc_files() do {} while (0) |
| 247 | #define remove_proc_files() do {} while (0) |
| 248 | |
| 249 | #endif /* CONFIG_USB_GADGET_DEBUG_FILES */ |
| 250 | |
| 251 | /* |
| 252 | * udc_disable - disable USB device controller |
| 253 | */ |
| 254 | static void udc_disable(struct lh7a40x_udc *dev) |
| 255 | { |
Harvey Harrison | 441b62c | 2008-03-03 16:08:34 -0800 | [diff] [blame] | 256 | DEBUG("%s, %p\n", __func__, dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 257 | |
| 258 | udc_set_address(dev, 0); |
| 259 | |
| 260 | /* Disable interrupts */ |
| 261 | usb_write(0, USB_IN_INT_EN); |
| 262 | usb_write(0, USB_OUT_INT_EN); |
| 263 | usb_write(0, USB_INT_EN); |
| 264 | |
| 265 | /* Disable the USB */ |
| 266 | usb_write(0, USB_PM); |
| 267 | |
| 268 | #ifdef CONFIG_ARCH_LH7A404 |
| 269 | /* Disable USB power */ |
| 270 | set_portc_dr(1, 0); |
| 271 | #endif |
| 272 | |
| 273 | /* if hardware supports it, disconnect from usb */ |
| 274 | /* make_usb_disappear(); */ |
| 275 | |
| 276 | dev->ep0state = WAIT_FOR_SETUP; |
| 277 | dev->gadget.speed = USB_SPEED_UNKNOWN; |
| 278 | dev->usb_address = 0; |
| 279 | } |
| 280 | |
| 281 | /* |
| 282 | * udc_reinit - initialize software state |
| 283 | */ |
| 284 | static void udc_reinit(struct lh7a40x_udc *dev) |
| 285 | { |
| 286 | u32 i; |
| 287 | |
Harvey Harrison | 441b62c | 2008-03-03 16:08:34 -0800 | [diff] [blame] | 288 | DEBUG("%s, %p\n", __func__, dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 289 | |
| 290 | /* device/ep0 records init */ |
| 291 | INIT_LIST_HEAD(&dev->gadget.ep_list); |
| 292 | INIT_LIST_HEAD(&dev->gadget.ep0->ep_list); |
| 293 | dev->ep0state = WAIT_FOR_SETUP; |
| 294 | |
| 295 | /* basic endpoint records init */ |
| 296 | for (i = 0; i < UDC_MAX_ENDPOINTS; i++) { |
| 297 | struct lh7a40x_ep *ep = &dev->ep[i]; |
| 298 | |
| 299 | if (i != 0) |
| 300 | list_add_tail(&ep->ep.ep_list, &dev->gadget.ep_list); |
| 301 | |
| 302 | ep->desc = 0; |
| 303 | ep->stopped = 0; |
| 304 | INIT_LIST_HEAD(&ep->queue); |
| 305 | ep->pio_irqs = 0; |
| 306 | } |
| 307 | |
| 308 | /* the rest was statically initialized, and is read-only */ |
| 309 | } |
| 310 | |
| 311 | #define BYTES2MAXP(x) (x / 8) |
| 312 | #define MAXP2BYTES(x) (x * 8) |
| 313 | |
| 314 | /* until it's enabled, this UDC should be completely invisible |
| 315 | * to any USB host. |
| 316 | */ |
| 317 | static void udc_enable(struct lh7a40x_udc *dev) |
| 318 | { |
| 319 | int ep; |
| 320 | |
Harvey Harrison | 441b62c | 2008-03-03 16:08:34 -0800 | [diff] [blame] | 321 | DEBUG("%s, %p\n", __func__, dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 322 | |
| 323 | dev->gadget.speed = USB_SPEED_UNKNOWN; |
| 324 | |
| 325 | #ifdef CONFIG_ARCH_LH7A404 |
| 326 | /* Set Port C bit 1 & 2 as output */ |
| 327 | set_portc_ddr(1, 1); |
| 328 | set_portc_ddr(2, 1); |
| 329 | |
| 330 | /* Enable USB power */ |
| 331 | set_portc_dr(1, 0); |
| 332 | #endif |
| 333 | |
| 334 | /* |
| 335 | * C.f Chapter 18.1.3.1 Initializing the USB |
| 336 | */ |
| 337 | |
| 338 | /* Disable the USB */ |
| 339 | usb_clear(PM_USB_ENABLE, USB_PM); |
| 340 | |
| 341 | /* Reset APB & I/O sides of the USB */ |
| 342 | usb_set(USB_RESET_APB | USB_RESET_IO, USB_RESET); |
| 343 | mdelay(5); |
| 344 | usb_clear(USB_RESET_APB | USB_RESET_IO, USB_RESET); |
| 345 | |
| 346 | /* Set MAXP values for each */ |
| 347 | for (ep = 0; ep < UDC_MAX_ENDPOINTS; ep++) { |
| 348 | struct lh7a40x_ep *ep_reg = &dev->ep[ep]; |
| 349 | u32 csr; |
| 350 | |
| 351 | usb_set_index(ep); |
| 352 | |
| 353 | switch (ep_reg->ep_type) { |
| 354 | case ep_bulk_in: |
| 355 | case ep_interrupt: |
| 356 | usb_clear(USB_IN_CSR2_USB_DMA_EN | USB_IN_CSR2_AUTO_SET, |
| 357 | ep_reg->csr2); |
| 358 | /* Fall through */ |
| 359 | case ep_control: |
| 360 | usb_write(BYTES2MAXP(ep_maxpacket(ep_reg)), |
| 361 | USB_IN_MAXP); |
| 362 | break; |
| 363 | case ep_bulk_out: |
| 364 | usb_clear(USB_OUT_CSR2_USB_DMA_EN | |
| 365 | USB_OUT_CSR2_AUTO_CLR, ep_reg->csr2); |
| 366 | usb_write(BYTES2MAXP(ep_maxpacket(ep_reg)), |
| 367 | USB_OUT_MAXP); |
| 368 | break; |
| 369 | } |
| 370 | |
| 371 | /* Read & Write CSR1, just in case */ |
| 372 | csr = usb_read(ep_reg->csr1); |
| 373 | usb_write(csr, ep_reg->csr1); |
| 374 | |
| 375 | flush(ep_reg); |
| 376 | } |
| 377 | |
| 378 | /* Disable interrupts */ |
| 379 | usb_write(0, USB_IN_INT_EN); |
| 380 | usb_write(0, USB_OUT_INT_EN); |
| 381 | usb_write(0, USB_INT_EN); |
| 382 | |
| 383 | /* Enable interrupts */ |
| 384 | usb_set(USB_IN_INT_EP0, USB_IN_INT_EN); |
| 385 | usb_set(USB_INT_RESET_INT | USB_INT_RESUME_INT, USB_INT_EN); |
| 386 | /* Dont enable rest of the interrupts */ |
| 387 | /* usb_set(USB_IN_INT_EP3 | USB_IN_INT_EP1 | USB_IN_INT_EP0, USB_IN_INT_EN); |
| 388 | usb_set(USB_OUT_INT_EP2, USB_OUT_INT_EN); */ |
| 389 | |
| 390 | /* Enable SUSPEND */ |
| 391 | usb_set(PM_ENABLE_SUSPEND, USB_PM); |
| 392 | |
| 393 | /* Enable the USB */ |
| 394 | usb_set(PM_USB_ENABLE, USB_PM); |
| 395 | |
| 396 | #ifdef CONFIG_ARCH_LH7A404 |
| 397 | /* NOTE: DOES NOT WORK! */ |
| 398 | /* Let host detect UDC: |
| 399 | * Software must write a 0 to the PMR:DCP_CTRL bit to turn this |
| 400 | * transistor on and pull the USBDP pin HIGH. |
| 401 | */ |
| 402 | /* usb_clear(PM_USB_DCP, USB_PM); |
| 403 | usb_set(PM_USB_DCP, USB_PM); */ |
| 404 | #endif |
| 405 | } |
| 406 | |
| 407 | /* |
| 408 | Register entry point for the peripheral controller driver. |
| 409 | */ |
| 410 | int usb_gadget_register_driver(struct usb_gadget_driver *driver) |
| 411 | { |
| 412 | struct lh7a40x_udc *dev = the_controller; |
| 413 | int retval; |
| 414 | |
Harvey Harrison | 441b62c | 2008-03-03 16:08:34 -0800 | [diff] [blame] | 415 | DEBUG("%s: %s\n", __func__, driver->driver.name); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 416 | |
| 417 | if (!driver |
David Brownell | 6bea476 | 2006-12-05 03:15:33 -0800 | [diff] [blame] | 418 | || driver->speed != USB_SPEED_FULL |
| 419 | || !driver->bind |
| 420 | || !driver->disconnect |
| 421 | || !driver->setup) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 422 | return -EINVAL; |
| 423 | if (!dev) |
| 424 | return -ENODEV; |
| 425 | if (dev->driver) |
| 426 | return -EBUSY; |
| 427 | |
| 428 | /* first hook up the driver ... */ |
| 429 | dev->driver = driver; |
| 430 | dev->gadget.dev.driver = &driver->driver; |
| 431 | |
| 432 | device_add(&dev->gadget.dev); |
| 433 | retval = driver->bind(&dev->gadget); |
| 434 | if (retval) { |
| 435 | printk("%s: bind to driver %s --> error %d\n", dev->gadget.name, |
| 436 | driver->driver.name, retval); |
| 437 | device_del(&dev->gadget.dev); |
| 438 | |
| 439 | dev->driver = 0; |
| 440 | dev->gadget.dev.driver = 0; |
| 441 | return retval; |
| 442 | } |
| 443 | |
| 444 | /* ... then enable host detection and ep0; and we're ready |
| 445 | * for set_configuration as well as eventual disconnect. |
| 446 | * NOTE: this shouldn't power up until later. |
| 447 | */ |
| 448 | printk("%s: registered gadget driver '%s'\n", dev->gadget.name, |
| 449 | driver->driver.name); |
| 450 | |
| 451 | udc_enable(dev); |
| 452 | |
| 453 | return 0; |
| 454 | } |
| 455 | |
| 456 | EXPORT_SYMBOL(usb_gadget_register_driver); |
| 457 | |
| 458 | /* |
| 459 | Unregister entry point for the peripheral controller driver. |
| 460 | */ |
| 461 | int usb_gadget_unregister_driver(struct usb_gadget_driver *driver) |
| 462 | { |
| 463 | struct lh7a40x_udc *dev = the_controller; |
| 464 | unsigned long flags; |
| 465 | |
| 466 | if (!dev) |
| 467 | return -ENODEV; |
David Brownell | 6bea476 | 2006-12-05 03:15:33 -0800 | [diff] [blame] | 468 | if (!driver || driver != dev->driver || !driver->unbind) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 469 | return -EINVAL; |
| 470 | |
| 471 | spin_lock_irqsave(&dev->lock, flags); |
| 472 | dev->driver = 0; |
| 473 | stop_activity(dev, driver); |
| 474 | spin_unlock_irqrestore(&dev->lock, flags); |
| 475 | |
| 476 | driver->unbind(&dev->gadget); |
Patrik Sevallius | eb0be47 | 2007-11-20 09:32:00 -0800 | [diff] [blame] | 477 | dev->gadget.dev.driver = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 478 | device_del(&dev->gadget.dev); |
| 479 | |
| 480 | udc_disable(dev); |
| 481 | |
| 482 | DEBUG("unregistered gadget driver '%s'\n", driver->driver.name); |
| 483 | return 0; |
| 484 | } |
| 485 | |
| 486 | EXPORT_SYMBOL(usb_gadget_unregister_driver); |
| 487 | |
| 488 | /*-------------------------------------------------------------------------*/ |
| 489 | |
| 490 | /** Write request to FIFO (max write == maxp size) |
| 491 | * Return: 0 = still running, 1 = completed, negative = errno |
| 492 | * NOTE: INDEX register must be set for EP |
| 493 | */ |
| 494 | static int write_fifo(struct lh7a40x_ep *ep, struct lh7a40x_request *req) |
| 495 | { |
| 496 | u32 max; |
| 497 | u32 csr; |
| 498 | |
| 499 | max = le16_to_cpu(ep->desc->wMaxPacketSize); |
| 500 | |
| 501 | csr = usb_read(ep->csr1); |
| 502 | DEBUG("CSR: %x %d\n", csr, csr & USB_IN_CSR1_FIFO_NOT_EMPTY); |
| 503 | |
| 504 | if (!(csr & USB_IN_CSR1_FIFO_NOT_EMPTY)) { |
| 505 | unsigned count; |
| 506 | int is_last, is_short; |
| 507 | |
| 508 | count = write_packet(ep, req, max); |
| 509 | usb_set(USB_IN_CSR1_IN_PKT_RDY, ep->csr1); |
| 510 | |
| 511 | /* last packet is usually short (or a zlp) */ |
| 512 | if (unlikely(count != max)) |
| 513 | is_last = is_short = 1; |
| 514 | else { |
| 515 | if (likely(req->req.length != req->req.actual) |
| 516 | || req->req.zero) |
| 517 | is_last = 0; |
| 518 | else |
| 519 | is_last = 1; |
| 520 | /* interrupt/iso maxpacket may not fill the fifo */ |
| 521 | is_short = unlikely(max < ep_maxpacket(ep)); |
| 522 | } |
| 523 | |
Harvey Harrison | 441b62c | 2008-03-03 16:08:34 -0800 | [diff] [blame] | 524 | DEBUG("%s: wrote %s %d bytes%s%s %d left %p\n", __func__, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 525 | ep->ep.name, count, |
| 526 | is_last ? "/L" : "", is_short ? "/S" : "", |
| 527 | req->req.length - req->req.actual, req); |
| 528 | |
| 529 | /* requests complete when all IN data is in the FIFO */ |
| 530 | if (is_last) { |
| 531 | done(ep, req, 0); |
| 532 | if (list_empty(&ep->queue)) { |
| 533 | pio_irq_disable(ep_index(ep)); |
| 534 | } |
| 535 | return 1; |
| 536 | } |
| 537 | } else { |
| 538 | DEBUG("Hmm.. %d ep FIFO is not empty!\n", ep_index(ep)); |
| 539 | } |
| 540 | |
| 541 | return 0; |
| 542 | } |
| 543 | |
| 544 | /** Read to request from FIFO (max read == bytes in fifo) |
| 545 | * Return: 0 = still running, 1 = completed, negative = errno |
| 546 | * NOTE: INDEX register must be set for EP |
| 547 | */ |
| 548 | static int read_fifo(struct lh7a40x_ep *ep, struct lh7a40x_request *req) |
| 549 | { |
| 550 | u32 csr; |
| 551 | u8 *buf; |
| 552 | unsigned bufferspace, count, is_short; |
| 553 | volatile u32 *fifo = (volatile u32 *)ep->fifo; |
| 554 | |
| 555 | /* make sure there's a packet in the FIFO. */ |
| 556 | csr = usb_read(ep->csr1); |
| 557 | if (!(csr & USB_OUT_CSR1_OUT_PKT_RDY)) { |
Harvey Harrison | 441b62c | 2008-03-03 16:08:34 -0800 | [diff] [blame] | 558 | DEBUG("%s: Packet NOT ready!\n", __func__); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 559 | return -EINVAL; |
| 560 | } |
| 561 | |
| 562 | buf = req->req.buf + req->req.actual; |
| 563 | prefetchw(buf); |
| 564 | bufferspace = req->req.length - req->req.actual; |
| 565 | |
| 566 | /* read all bytes from this packet */ |
| 567 | count = usb_read(USB_OUT_FIFO_WC1); |
| 568 | req->req.actual += min(count, bufferspace); |
| 569 | |
| 570 | is_short = (count < ep->ep.maxpacket); |
| 571 | DEBUG("read %s %02x, %d bytes%s req %p %d/%d\n", |
| 572 | ep->ep.name, csr, count, |
| 573 | is_short ? "/S" : "", req, req->req.actual, req->req.length); |
| 574 | |
| 575 | while (likely(count-- != 0)) { |
| 576 | u8 byte = (u8) (*fifo & 0xff); |
| 577 | |
| 578 | if (unlikely(bufferspace == 0)) { |
| 579 | /* this happens when the driver's buffer |
| 580 | * is smaller than what the host sent. |
| 581 | * discard the extra data. |
| 582 | */ |
| 583 | if (req->req.status != -EOVERFLOW) |
| 584 | printk("%s overflow %d\n", ep->ep.name, count); |
| 585 | req->req.status = -EOVERFLOW; |
| 586 | } else { |
| 587 | *buf++ = byte; |
| 588 | bufferspace--; |
| 589 | } |
| 590 | } |
| 591 | |
| 592 | usb_clear(USB_OUT_CSR1_OUT_PKT_RDY, ep->csr1); |
| 593 | |
| 594 | /* completion */ |
| 595 | if (is_short || req->req.actual == req->req.length) { |
| 596 | done(ep, req, 0); |
| 597 | usb_set(USB_OUT_CSR1_FIFO_FLUSH, ep->csr1); |
| 598 | |
| 599 | if (list_empty(&ep->queue)) |
| 600 | pio_irq_disable(ep_index(ep)); |
| 601 | return 1; |
| 602 | } |
| 603 | |
| 604 | /* finished that packet. the next one may be waiting... */ |
| 605 | return 0; |
| 606 | } |
| 607 | |
| 608 | /* |
| 609 | * done - retire a request; caller blocked irqs |
| 610 | * INDEX register is preserved to keep same |
| 611 | */ |
| 612 | static void done(struct lh7a40x_ep *ep, struct lh7a40x_request *req, int status) |
| 613 | { |
| 614 | unsigned int stopped = ep->stopped; |
| 615 | u32 index; |
| 616 | |
Harvey Harrison | 441b62c | 2008-03-03 16:08:34 -0800 | [diff] [blame] | 617 | DEBUG("%s, %p\n", __func__, ep); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 618 | list_del_init(&req->queue); |
| 619 | |
| 620 | if (likely(req->req.status == -EINPROGRESS)) |
| 621 | req->req.status = status; |
| 622 | else |
| 623 | status = req->req.status; |
| 624 | |
| 625 | if (status && status != -ESHUTDOWN) |
| 626 | DEBUG("complete %s req %p stat %d len %u/%u\n", |
| 627 | ep->ep.name, &req->req, status, |
| 628 | req->req.actual, req->req.length); |
| 629 | |
| 630 | /* don't modify queue heads during completion callback */ |
| 631 | ep->stopped = 1; |
| 632 | /* Read current index (completion may modify it) */ |
| 633 | index = usb_read(USB_INDEX); |
| 634 | |
| 635 | spin_unlock(&ep->dev->lock); |
| 636 | req->req.complete(&ep->ep, &req->req); |
| 637 | spin_lock(&ep->dev->lock); |
| 638 | |
| 639 | /* Restore index */ |
| 640 | usb_set_index(index); |
| 641 | ep->stopped = stopped; |
| 642 | } |
| 643 | |
| 644 | /** Enable EP interrupt */ |
| 645 | static void pio_irq_enable(int ep) |
| 646 | { |
Harvey Harrison | 441b62c | 2008-03-03 16:08:34 -0800 | [diff] [blame] | 647 | DEBUG("%s: %d\n", __func__, ep); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 648 | |
| 649 | switch (ep) { |
| 650 | case 1: |
| 651 | usb_set(USB_IN_INT_EP1, USB_IN_INT_EN); |
| 652 | break; |
| 653 | case 2: |
| 654 | usb_set(USB_OUT_INT_EP2, USB_OUT_INT_EN); |
| 655 | break; |
| 656 | case 3: |
| 657 | usb_set(USB_IN_INT_EP3, USB_IN_INT_EN); |
| 658 | break; |
| 659 | default: |
| 660 | DEBUG("Unknown endpoint: %d\n", ep); |
| 661 | break; |
| 662 | } |
| 663 | } |
| 664 | |
| 665 | /** Disable EP interrupt */ |
| 666 | static void pio_irq_disable(int ep) |
| 667 | { |
Harvey Harrison | 441b62c | 2008-03-03 16:08:34 -0800 | [diff] [blame] | 668 | DEBUG("%s: %d\n", __func__, ep); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 669 | |
| 670 | switch (ep) { |
| 671 | case 1: |
| 672 | usb_clear(USB_IN_INT_EP1, USB_IN_INT_EN); |
| 673 | break; |
| 674 | case 2: |
| 675 | usb_clear(USB_OUT_INT_EP2, USB_OUT_INT_EN); |
| 676 | break; |
| 677 | case 3: |
| 678 | usb_clear(USB_IN_INT_EP3, USB_IN_INT_EN); |
| 679 | break; |
| 680 | default: |
| 681 | DEBUG("Unknown endpoint: %d\n", ep); |
| 682 | break; |
| 683 | } |
| 684 | } |
| 685 | |
| 686 | /* |
| 687 | * nuke - dequeue ALL requests |
| 688 | */ |
| 689 | void nuke(struct lh7a40x_ep *ep, int status) |
| 690 | { |
| 691 | struct lh7a40x_request *req; |
| 692 | |
Harvey Harrison | 441b62c | 2008-03-03 16:08:34 -0800 | [diff] [blame] | 693 | DEBUG("%s, %p\n", __func__, ep); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 694 | |
| 695 | /* Flush FIFO */ |
| 696 | flush(ep); |
| 697 | |
| 698 | /* called with irqs blocked */ |
| 699 | while (!list_empty(&ep->queue)) { |
| 700 | req = list_entry(ep->queue.next, struct lh7a40x_request, queue); |
| 701 | done(ep, req, status); |
| 702 | } |
| 703 | |
Steven Cole | 093cf72 | 2005-05-03 19:07:24 -0600 | [diff] [blame] | 704 | /* Disable IRQ if EP is enabled (has descriptor) */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 705 | if (ep->desc) |
| 706 | pio_irq_disable(ep_index(ep)); |
| 707 | } |
| 708 | |
| 709 | /* |
| 710 | void nuke_all(struct lh7a40x_udc *dev) |
| 711 | { |
| 712 | int n; |
| 713 | for(n=0; n<UDC_MAX_ENDPOINTS; n++) { |
| 714 | struct lh7a40x_ep *ep = &dev->ep[n]; |
| 715 | usb_set_index(n); |
| 716 | nuke(ep, 0); |
| 717 | } |
| 718 | }*/ |
| 719 | |
| 720 | /* |
| 721 | static void flush_all(struct lh7a40x_udc *dev) |
| 722 | { |
| 723 | int n; |
| 724 | for (n = 0; n < UDC_MAX_ENDPOINTS; n++) |
| 725 | { |
| 726 | struct lh7a40x_ep *ep = &dev->ep[n]; |
| 727 | flush(ep); |
| 728 | } |
| 729 | } |
| 730 | */ |
| 731 | |
| 732 | /** Flush EP |
| 733 | * NOTE: INDEX register must be set before this call |
| 734 | */ |
| 735 | static void flush(struct lh7a40x_ep *ep) |
| 736 | { |
Harvey Harrison | 441b62c | 2008-03-03 16:08:34 -0800 | [diff] [blame] | 737 | DEBUG("%s, %p\n", __func__, ep); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 738 | |
| 739 | switch (ep->ep_type) { |
| 740 | case ep_control: |
| 741 | /* check, by implication c.f. 15.1.2.11 */ |
| 742 | break; |
| 743 | |
| 744 | case ep_bulk_in: |
| 745 | case ep_interrupt: |
| 746 | /* if(csr & USB_IN_CSR1_IN_PKT_RDY) */ |
| 747 | usb_set(USB_IN_CSR1_FIFO_FLUSH, ep->csr1); |
| 748 | break; |
| 749 | |
| 750 | case ep_bulk_out: |
| 751 | /* if(csr & USB_OUT_CSR1_OUT_PKT_RDY) */ |
| 752 | usb_set(USB_OUT_CSR1_FIFO_FLUSH, ep->csr1); |
| 753 | break; |
| 754 | } |
| 755 | } |
| 756 | |
| 757 | /** |
| 758 | * lh7a40x_in_epn - handle IN interrupt |
| 759 | */ |
| 760 | static void lh7a40x_in_epn(struct lh7a40x_udc *dev, u32 ep_idx, u32 intr) |
| 761 | { |
| 762 | u32 csr; |
| 763 | struct lh7a40x_ep *ep = &dev->ep[ep_idx]; |
| 764 | struct lh7a40x_request *req; |
| 765 | |
| 766 | usb_set_index(ep_idx); |
| 767 | |
| 768 | csr = usb_read(ep->csr1); |
Harvey Harrison | 441b62c | 2008-03-03 16:08:34 -0800 | [diff] [blame] | 769 | DEBUG("%s: %d, csr %x\n", __func__, ep_idx, csr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 770 | |
| 771 | if (csr & USB_IN_CSR1_SENT_STALL) { |
| 772 | DEBUG("USB_IN_CSR1_SENT_STALL\n"); |
| 773 | usb_set(USB_IN_CSR1_SENT_STALL /*|USB_IN_CSR1_SEND_STALL */ , |
| 774 | ep->csr1); |
| 775 | return; |
| 776 | } |
| 777 | |
| 778 | if (!ep->desc) { |
Harvey Harrison | 441b62c | 2008-03-03 16:08:34 -0800 | [diff] [blame] | 779 | DEBUG("%s: NO EP DESC\n", __func__); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 780 | return; |
| 781 | } |
| 782 | |
| 783 | if (list_empty(&ep->queue)) |
| 784 | req = 0; |
| 785 | else |
| 786 | req = list_entry(ep->queue.next, struct lh7a40x_request, queue); |
| 787 | |
| 788 | DEBUG("req: %p\n", req); |
| 789 | |
| 790 | if (!req) |
| 791 | return; |
| 792 | |
| 793 | write_fifo(ep, req); |
| 794 | } |
| 795 | |
| 796 | /* ********************************************************************************************* */ |
| 797 | /* Bulk OUT (recv) |
| 798 | */ |
| 799 | |
| 800 | static void lh7a40x_out_epn(struct lh7a40x_udc *dev, u32 ep_idx, u32 intr) |
| 801 | { |
| 802 | struct lh7a40x_ep *ep = &dev->ep[ep_idx]; |
| 803 | struct lh7a40x_request *req; |
| 804 | |
Harvey Harrison | 441b62c | 2008-03-03 16:08:34 -0800 | [diff] [blame] | 805 | DEBUG("%s: %d\n", __func__, ep_idx); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 806 | |
| 807 | usb_set_index(ep_idx); |
| 808 | |
| 809 | if (ep->desc) { |
| 810 | u32 csr; |
| 811 | csr = usb_read(ep->csr1); |
| 812 | |
| 813 | while ((csr = |
| 814 | usb_read(ep-> |
| 815 | csr1)) & (USB_OUT_CSR1_OUT_PKT_RDY | |
| 816 | USB_OUT_CSR1_SENT_STALL)) { |
Harvey Harrison | 441b62c | 2008-03-03 16:08:34 -0800 | [diff] [blame] | 817 | DEBUG("%s: %x\n", __func__, csr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 818 | |
| 819 | if (csr & USB_OUT_CSR1_SENT_STALL) { |
| 820 | DEBUG("%s: stall sent, flush fifo\n", |
Harvey Harrison | 441b62c | 2008-03-03 16:08:34 -0800 | [diff] [blame] | 821 | __func__); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 822 | /* usb_set(USB_OUT_CSR1_FIFO_FLUSH, ep->csr1); */ |
| 823 | flush(ep); |
| 824 | } else if (csr & USB_OUT_CSR1_OUT_PKT_RDY) { |
| 825 | if (list_empty(&ep->queue)) |
| 826 | req = 0; |
| 827 | else |
| 828 | req = |
| 829 | list_entry(ep->queue.next, |
| 830 | struct lh7a40x_request, |
| 831 | queue); |
| 832 | |
| 833 | if (!req) { |
| 834 | printk("%s: NULL REQ %d\n", |
Harvey Harrison | 441b62c | 2008-03-03 16:08:34 -0800 | [diff] [blame] | 835 | __func__, ep_idx); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 836 | flush(ep); |
| 837 | break; |
| 838 | } else { |
| 839 | read_fifo(ep, req); |
| 840 | } |
| 841 | } |
| 842 | |
| 843 | } |
| 844 | |
| 845 | } else { |
| 846 | /* Throw packet away.. */ |
Harvey Harrison | 441b62c | 2008-03-03 16:08:34 -0800 | [diff] [blame] | 847 | printk("%s: No descriptor?!?\n", __func__); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 848 | flush(ep); |
| 849 | } |
| 850 | } |
| 851 | |
| 852 | static void stop_activity(struct lh7a40x_udc *dev, |
| 853 | struct usb_gadget_driver *driver) |
| 854 | { |
| 855 | int i; |
| 856 | |
| 857 | /* don't disconnect drivers more than once */ |
| 858 | if (dev->gadget.speed == USB_SPEED_UNKNOWN) |
| 859 | driver = 0; |
| 860 | dev->gadget.speed = USB_SPEED_UNKNOWN; |
| 861 | |
| 862 | /* prevent new request submissions, kill any outstanding requests */ |
| 863 | for (i = 0; i < UDC_MAX_ENDPOINTS; i++) { |
| 864 | struct lh7a40x_ep *ep = &dev->ep[i]; |
| 865 | ep->stopped = 1; |
| 866 | |
| 867 | usb_set_index(i); |
| 868 | nuke(ep, -ESHUTDOWN); |
| 869 | } |
| 870 | |
| 871 | /* report disconnect; the driver is already quiesced */ |
| 872 | if (driver) { |
| 873 | spin_unlock(&dev->lock); |
| 874 | driver->disconnect(&dev->gadget); |
| 875 | spin_lock(&dev->lock); |
| 876 | } |
| 877 | |
| 878 | /* re-init driver-visible data structures */ |
| 879 | udc_reinit(dev); |
| 880 | } |
| 881 | |
| 882 | /** Handle USB RESET interrupt |
| 883 | */ |
| 884 | static void lh7a40x_reset_intr(struct lh7a40x_udc *dev) |
| 885 | { |
| 886 | #if 0 /* def CONFIG_ARCH_LH7A404 */ |
| 887 | /* Does not work always... */ |
| 888 | |
Harvey Harrison | 441b62c | 2008-03-03 16:08:34 -0800 | [diff] [blame] | 889 | DEBUG("%s: %d\n", __func__, dev->usb_address); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 890 | |
| 891 | if (!dev->usb_address) { |
| 892 | /*usb_set(USB_RESET_IO, USB_RESET); |
| 893 | mdelay(5); |
| 894 | usb_clear(USB_RESET_IO, USB_RESET); */ |
| 895 | return; |
| 896 | } |
| 897 | /* Put the USB controller into reset. */ |
| 898 | usb_set(USB_RESET_IO, USB_RESET); |
| 899 | |
| 900 | /* Set Device ID to 0 */ |
| 901 | udc_set_address(dev, 0); |
| 902 | |
| 903 | /* Let PLL2 settle down */ |
| 904 | mdelay(5); |
| 905 | |
| 906 | /* Release the USB controller from reset */ |
| 907 | usb_clear(USB_RESET_IO, USB_RESET); |
| 908 | |
| 909 | /* Re-enable UDC */ |
| 910 | udc_enable(dev); |
| 911 | |
| 912 | #endif |
| 913 | dev->gadget.speed = USB_SPEED_FULL; |
| 914 | } |
| 915 | |
| 916 | /* |
| 917 | * lh7a40x usb client interrupt handler. |
| 918 | */ |
David Howells | 7d12e78 | 2006-10-05 14:55:46 +0100 | [diff] [blame] | 919 | static irqreturn_t lh7a40x_udc_irq(int irq, void *_dev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 920 | { |
| 921 | struct lh7a40x_udc *dev = _dev; |
| 922 | |
| 923 | DEBUG("\n\n"); |
| 924 | |
| 925 | spin_lock(&dev->lock); |
| 926 | |
| 927 | for (;;) { |
| 928 | u32 intr_in = usb_read(USB_IN_INT); |
| 929 | u32 intr_out = usb_read(USB_OUT_INT); |
| 930 | u32 intr_int = usb_read(USB_INT); |
| 931 | |
| 932 | /* Test also against enable bits.. (lh7a40x errata).. Sigh.. */ |
| 933 | u32 in_en = usb_read(USB_IN_INT_EN); |
| 934 | u32 out_en = usb_read(USB_OUT_INT_EN); |
| 935 | |
| 936 | if (!intr_out && !intr_in && !intr_int) |
| 937 | break; |
| 938 | |
Harvey Harrison | 441b62c | 2008-03-03 16:08:34 -0800 | [diff] [blame] | 939 | DEBUG("%s (on state %s)\n", __func__, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 940 | state_names[dev->ep0state]); |
| 941 | DEBUG("intr_out = %x\n", intr_out); |
| 942 | DEBUG("intr_in = %x\n", intr_in); |
| 943 | DEBUG("intr_int = %x\n", intr_int); |
| 944 | |
| 945 | if (intr_in) { |
| 946 | usb_write(intr_in, USB_IN_INT); |
| 947 | |
| 948 | if ((intr_in & USB_IN_INT_EP1) |
| 949 | && (in_en & USB_IN_INT_EP1)) { |
| 950 | DEBUG("USB_IN_INT_EP1\n"); |
| 951 | lh7a40x_in_epn(dev, 1, intr_in); |
| 952 | } |
| 953 | if ((intr_in & USB_IN_INT_EP3) |
| 954 | && (in_en & USB_IN_INT_EP3)) { |
| 955 | DEBUG("USB_IN_INT_EP3\n"); |
| 956 | lh7a40x_in_epn(dev, 3, intr_in); |
| 957 | } |
| 958 | if (intr_in & USB_IN_INT_EP0) { |
| 959 | DEBUG("USB_IN_INT_EP0 (control)\n"); |
| 960 | lh7a40x_handle_ep0(dev, intr_in); |
| 961 | } |
| 962 | } |
| 963 | |
| 964 | if (intr_out) { |
| 965 | usb_write(intr_out, USB_OUT_INT); |
| 966 | |
| 967 | if ((intr_out & USB_OUT_INT_EP2) |
| 968 | && (out_en & USB_OUT_INT_EP2)) { |
| 969 | DEBUG("USB_OUT_INT_EP2\n"); |
| 970 | lh7a40x_out_epn(dev, 2, intr_out); |
| 971 | } |
| 972 | } |
| 973 | |
| 974 | if (intr_int) { |
| 975 | usb_write(intr_int, USB_INT); |
| 976 | |
| 977 | if (intr_int & USB_INT_RESET_INT) { |
| 978 | lh7a40x_reset_intr(dev); |
| 979 | } |
| 980 | |
| 981 | if (intr_int & USB_INT_RESUME_INT) { |
| 982 | DEBUG("USB resume\n"); |
| 983 | |
| 984 | if (dev->gadget.speed != USB_SPEED_UNKNOWN |
| 985 | && dev->driver |
| 986 | && dev->driver->resume |
| 987 | && is_usb_connected()) { |
| 988 | dev->driver->resume(&dev->gadget); |
| 989 | } |
| 990 | } |
| 991 | |
| 992 | if (intr_int & USB_INT_SUSPEND_INT) { |
| 993 | DEBUG("USB suspend%s\n", |
| 994 | is_usb_connected()? "" : "+disconnect"); |
| 995 | if (!is_usb_connected()) { |
| 996 | stop_activity(dev, dev->driver); |
| 997 | } else if (dev->gadget.speed != |
| 998 | USB_SPEED_UNKNOWN && dev->driver |
| 999 | && dev->driver->suspend) { |
| 1000 | dev->driver->suspend(&dev->gadget); |
| 1001 | } |
| 1002 | } |
| 1003 | |
| 1004 | } |
| 1005 | } |
| 1006 | |
| 1007 | spin_unlock(&dev->lock); |
| 1008 | |
| 1009 | return IRQ_HANDLED; |
| 1010 | } |
| 1011 | |
| 1012 | static int lh7a40x_ep_enable(struct usb_ep *_ep, |
| 1013 | const struct usb_endpoint_descriptor *desc) |
| 1014 | { |
| 1015 | struct lh7a40x_ep *ep; |
| 1016 | struct lh7a40x_udc *dev; |
| 1017 | unsigned long flags; |
| 1018 | |
Harvey Harrison | 441b62c | 2008-03-03 16:08:34 -0800 | [diff] [blame] | 1019 | DEBUG("%s, %p\n", __func__, _ep); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1020 | |
| 1021 | ep = container_of(_ep, struct lh7a40x_ep, ep); |
| 1022 | if (!_ep || !desc || ep->desc || _ep->name == ep0name |
| 1023 | || desc->bDescriptorType != USB_DT_ENDPOINT |
| 1024 | || ep->bEndpointAddress != desc->bEndpointAddress |
| 1025 | || ep_maxpacket(ep) < le16_to_cpu(desc->wMaxPacketSize)) { |
Harvey Harrison | 441b62c | 2008-03-03 16:08:34 -0800 | [diff] [blame] | 1026 | DEBUG("%s, bad ep or descriptor\n", __func__); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1027 | return -EINVAL; |
| 1028 | } |
| 1029 | |
| 1030 | /* xfer types must match, except that interrupt ~= bulk */ |
| 1031 | if (ep->bmAttributes != desc->bmAttributes |
| 1032 | && ep->bmAttributes != USB_ENDPOINT_XFER_BULK |
| 1033 | && desc->bmAttributes != USB_ENDPOINT_XFER_INT) { |
Harvey Harrison | 441b62c | 2008-03-03 16:08:34 -0800 | [diff] [blame] | 1034 | DEBUG("%s, %s type mismatch\n", __func__, _ep->name); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1035 | return -EINVAL; |
| 1036 | } |
| 1037 | |
| 1038 | /* hardware _could_ do smaller, but driver doesn't */ |
| 1039 | if ((desc->bmAttributes == USB_ENDPOINT_XFER_BULK |
| 1040 | && le16_to_cpu(desc->wMaxPacketSize) != ep_maxpacket(ep)) |
| 1041 | || !desc->wMaxPacketSize) { |
Harvey Harrison | 441b62c | 2008-03-03 16:08:34 -0800 | [diff] [blame] | 1042 | DEBUG("%s, bad %s maxpacket\n", __func__, _ep->name); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1043 | return -ERANGE; |
| 1044 | } |
| 1045 | |
| 1046 | dev = ep->dev; |
| 1047 | if (!dev->driver || dev->gadget.speed == USB_SPEED_UNKNOWN) { |
Harvey Harrison | 441b62c | 2008-03-03 16:08:34 -0800 | [diff] [blame] | 1048 | DEBUG("%s, bogus device state\n", __func__); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1049 | return -ESHUTDOWN; |
| 1050 | } |
| 1051 | |
| 1052 | spin_lock_irqsave(&ep->dev->lock, flags); |
| 1053 | |
| 1054 | ep->stopped = 0; |
| 1055 | ep->desc = desc; |
| 1056 | ep->pio_irqs = 0; |
| 1057 | ep->ep.maxpacket = le16_to_cpu(desc->wMaxPacketSize); |
| 1058 | |
Franck Bui-Huu | d5ec334 | 2006-02-23 09:35:06 +0100 | [diff] [blame] | 1059 | spin_unlock_irqrestore(&ep->dev->lock, flags); |
| 1060 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1061 | /* Reset halt state (does flush) */ |
| 1062 | lh7a40x_set_halt(_ep, 0); |
| 1063 | |
Harvey Harrison | 441b62c | 2008-03-03 16:08:34 -0800 | [diff] [blame] | 1064 | DEBUG("%s: enabled %s\n", __func__, _ep->name); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1065 | return 0; |
| 1066 | } |
| 1067 | |
| 1068 | /** Disable EP |
| 1069 | * NOTE: Sets INDEX register |
| 1070 | */ |
| 1071 | static int lh7a40x_ep_disable(struct usb_ep *_ep) |
| 1072 | { |
| 1073 | struct lh7a40x_ep *ep; |
| 1074 | unsigned long flags; |
| 1075 | |
Harvey Harrison | 441b62c | 2008-03-03 16:08:34 -0800 | [diff] [blame] | 1076 | DEBUG("%s, %p\n", __func__, _ep); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1077 | |
| 1078 | ep = container_of(_ep, struct lh7a40x_ep, ep); |
| 1079 | if (!_ep || !ep->desc) { |
Harvey Harrison | 441b62c | 2008-03-03 16:08:34 -0800 | [diff] [blame] | 1080 | DEBUG("%s, %s not enabled\n", __func__, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1081 | _ep ? ep->ep.name : NULL); |
| 1082 | return -EINVAL; |
| 1083 | } |
| 1084 | |
| 1085 | spin_lock_irqsave(&ep->dev->lock, flags); |
| 1086 | |
| 1087 | usb_set_index(ep_index(ep)); |
| 1088 | |
| 1089 | /* Nuke all pending requests (does flush) */ |
| 1090 | nuke(ep, -ESHUTDOWN); |
| 1091 | |
| 1092 | /* Disable ep IRQ */ |
| 1093 | pio_irq_disable(ep_index(ep)); |
| 1094 | |
| 1095 | ep->desc = 0; |
| 1096 | ep->stopped = 1; |
| 1097 | |
| 1098 | spin_unlock_irqrestore(&ep->dev->lock, flags); |
| 1099 | |
Harvey Harrison | 441b62c | 2008-03-03 16:08:34 -0800 | [diff] [blame] | 1100 | DEBUG("%s: disabled %s\n", __func__, _ep->name); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1101 | return 0; |
| 1102 | } |
| 1103 | |
| 1104 | static struct usb_request *lh7a40x_alloc_request(struct usb_ep *ep, |
Al Viro | 55016f1 | 2005-10-21 03:21:58 -0400 | [diff] [blame] | 1105 | gfp_t gfp_flags) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1106 | { |
| 1107 | struct lh7a40x_request *req; |
| 1108 | |
Harvey Harrison | 441b62c | 2008-03-03 16:08:34 -0800 | [diff] [blame] | 1109 | DEBUG("%s, %p\n", __func__, ep); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1110 | |
Eric Sesterhenn | 7039f42 | 2006-02-27 13:34:10 -0800 | [diff] [blame] | 1111 | req = kzalloc(sizeof(*req), gfp_flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1112 | if (!req) |
| 1113 | return 0; |
| 1114 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1115 | INIT_LIST_HEAD(&req->queue); |
| 1116 | |
| 1117 | return &req->req; |
| 1118 | } |
| 1119 | |
| 1120 | static void lh7a40x_free_request(struct usb_ep *ep, struct usb_request *_req) |
| 1121 | { |
| 1122 | struct lh7a40x_request *req; |
| 1123 | |
Harvey Harrison | 441b62c | 2008-03-03 16:08:34 -0800 | [diff] [blame] | 1124 | DEBUG("%s, %p\n", __func__, ep); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1125 | |
| 1126 | req = container_of(_req, struct lh7a40x_request, req); |
| 1127 | WARN_ON(!list_empty(&req->queue)); |
| 1128 | kfree(req); |
| 1129 | } |
| 1130 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1131 | /** Queue one request |
| 1132 | * Kickstart transfer if needed |
| 1133 | * NOTE: Sets INDEX register |
| 1134 | */ |
| 1135 | static int lh7a40x_queue(struct usb_ep *_ep, struct usb_request *_req, |
Al Viro | 55016f1 | 2005-10-21 03:21:58 -0400 | [diff] [blame] | 1136 | gfp_t gfp_flags) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1137 | { |
| 1138 | struct lh7a40x_request *req; |
| 1139 | struct lh7a40x_ep *ep; |
| 1140 | struct lh7a40x_udc *dev; |
| 1141 | unsigned long flags; |
| 1142 | |
Harvey Harrison | 441b62c | 2008-03-03 16:08:34 -0800 | [diff] [blame] | 1143 | DEBUG("\n\n\n%s, %p\n", __func__, _ep); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1144 | |
| 1145 | req = container_of(_req, struct lh7a40x_request, req); |
| 1146 | if (unlikely |
| 1147 | (!_req || !_req->complete || !_req->buf |
| 1148 | || !list_empty(&req->queue))) { |
Harvey Harrison | 441b62c | 2008-03-03 16:08:34 -0800 | [diff] [blame] | 1149 | DEBUG("%s, bad params\n", __func__); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1150 | return -EINVAL; |
| 1151 | } |
| 1152 | |
| 1153 | ep = container_of(_ep, struct lh7a40x_ep, ep); |
| 1154 | if (unlikely(!_ep || (!ep->desc && ep->ep.name != ep0name))) { |
Harvey Harrison | 441b62c | 2008-03-03 16:08:34 -0800 | [diff] [blame] | 1155 | DEBUG("%s, bad ep\n", __func__); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1156 | return -EINVAL; |
| 1157 | } |
| 1158 | |
| 1159 | dev = ep->dev; |
| 1160 | if (unlikely(!dev->driver || dev->gadget.speed == USB_SPEED_UNKNOWN)) { |
Harvey Harrison | 441b62c | 2008-03-03 16:08:34 -0800 | [diff] [blame] | 1161 | DEBUG("%s, bogus device state %p\n", __func__, dev->driver); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1162 | return -ESHUTDOWN; |
| 1163 | } |
| 1164 | |
| 1165 | DEBUG("%s queue req %p, len %d buf %p\n", _ep->name, _req, _req->length, |
| 1166 | _req->buf); |
| 1167 | |
| 1168 | spin_lock_irqsave(&dev->lock, flags); |
| 1169 | |
| 1170 | _req->status = -EINPROGRESS; |
| 1171 | _req->actual = 0; |
| 1172 | |
| 1173 | /* kickstart this i/o queue? */ |
| 1174 | DEBUG("Add to %d Q %d %d\n", ep_index(ep), list_empty(&ep->queue), |
| 1175 | ep->stopped); |
| 1176 | if (list_empty(&ep->queue) && likely(!ep->stopped)) { |
| 1177 | u32 csr; |
| 1178 | |
| 1179 | if (unlikely(ep_index(ep) == 0)) { |
| 1180 | /* EP0 */ |
| 1181 | list_add_tail(&req->queue, &ep->queue); |
| 1182 | lh7a40x_ep0_kick(dev, ep); |
| 1183 | req = 0; |
| 1184 | } else if (ep_is_in(ep)) { |
| 1185 | /* EP1 & EP3 */ |
| 1186 | usb_set_index(ep_index(ep)); |
| 1187 | csr = usb_read(ep->csr1); |
| 1188 | pio_irq_enable(ep_index(ep)); |
| 1189 | if ((csr & USB_IN_CSR1_FIFO_NOT_EMPTY) == 0) { |
| 1190 | if (write_fifo(ep, req) == 1) |
| 1191 | req = 0; |
| 1192 | } |
| 1193 | } else { |
| 1194 | /* EP2 */ |
| 1195 | usb_set_index(ep_index(ep)); |
| 1196 | csr = usb_read(ep->csr1); |
| 1197 | pio_irq_enable(ep_index(ep)); |
| 1198 | if (!(csr & USB_OUT_CSR1_FIFO_FULL)) { |
| 1199 | if (read_fifo(ep, req) == 1) |
| 1200 | req = 0; |
| 1201 | } |
| 1202 | } |
| 1203 | } |
| 1204 | |
| 1205 | /* pio or dma irq handler advances the queue. */ |
| 1206 | if (likely(req != 0)) |
| 1207 | list_add_tail(&req->queue, &ep->queue); |
| 1208 | |
| 1209 | spin_unlock_irqrestore(&dev->lock, flags); |
| 1210 | |
| 1211 | return 0; |
| 1212 | } |
| 1213 | |
| 1214 | /* dequeue JUST ONE request */ |
| 1215 | static int lh7a40x_dequeue(struct usb_ep *_ep, struct usb_request *_req) |
| 1216 | { |
| 1217 | struct lh7a40x_ep *ep; |
| 1218 | struct lh7a40x_request *req; |
| 1219 | unsigned long flags; |
| 1220 | |
Harvey Harrison | 441b62c | 2008-03-03 16:08:34 -0800 | [diff] [blame] | 1221 | DEBUG("%s, %p\n", __func__, _ep); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1222 | |
| 1223 | ep = container_of(_ep, struct lh7a40x_ep, ep); |
| 1224 | if (!_ep || ep->ep.name == ep0name) |
| 1225 | return -EINVAL; |
| 1226 | |
| 1227 | spin_lock_irqsave(&ep->dev->lock, flags); |
| 1228 | |
| 1229 | /* make sure it's actually queued on this endpoint */ |
| 1230 | list_for_each_entry(req, &ep->queue, queue) { |
| 1231 | if (&req->req == _req) |
| 1232 | break; |
| 1233 | } |
| 1234 | if (&req->req != _req) { |
| 1235 | spin_unlock_irqrestore(&ep->dev->lock, flags); |
| 1236 | return -EINVAL; |
| 1237 | } |
| 1238 | |
| 1239 | done(ep, req, -ECONNRESET); |
| 1240 | |
| 1241 | spin_unlock_irqrestore(&ep->dev->lock, flags); |
| 1242 | return 0; |
| 1243 | } |
| 1244 | |
| 1245 | /** Halt specific EP |
| 1246 | * Return 0 if success |
| 1247 | * NOTE: Sets INDEX register to EP ! |
| 1248 | */ |
| 1249 | static int lh7a40x_set_halt(struct usb_ep *_ep, int value) |
| 1250 | { |
| 1251 | struct lh7a40x_ep *ep; |
| 1252 | unsigned long flags; |
| 1253 | |
| 1254 | ep = container_of(_ep, struct lh7a40x_ep, ep); |
| 1255 | if (unlikely(!_ep || (!ep->desc && ep->ep.name != ep0name))) { |
Harvey Harrison | 441b62c | 2008-03-03 16:08:34 -0800 | [diff] [blame] | 1256 | DEBUG("%s, bad ep\n", __func__); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1257 | return -EINVAL; |
| 1258 | } |
| 1259 | |
| 1260 | usb_set_index(ep_index(ep)); |
| 1261 | |
Harvey Harrison | 441b62c | 2008-03-03 16:08:34 -0800 | [diff] [blame] | 1262 | DEBUG("%s, ep %d, val %d\n", __func__, ep_index(ep), value); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1263 | |
| 1264 | spin_lock_irqsave(&ep->dev->lock, flags); |
| 1265 | |
| 1266 | if (ep_index(ep) == 0) { |
| 1267 | /* EP0 */ |
| 1268 | usb_set(EP0_SEND_STALL, ep->csr1); |
| 1269 | } else if (ep_is_in(ep)) { |
| 1270 | u32 csr = usb_read(ep->csr1); |
| 1271 | if (value && ((csr & USB_IN_CSR1_FIFO_NOT_EMPTY) |
| 1272 | || !list_empty(&ep->queue))) { |
| 1273 | /* |
| 1274 | * Attempts to halt IN endpoints will fail (returning -EAGAIN) |
| 1275 | * if any transfer requests are still queued, or if the controller |
Jan Engelhardt | 96de0e2 | 2007-10-19 23:21:04 +0200 | [diff] [blame] | 1276 | * FIFO still holds bytes that the host hasn't collected. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1277 | */ |
| 1278 | spin_unlock_irqrestore(&ep->dev->lock, flags); |
| 1279 | DEBUG |
| 1280 | ("Attempt to halt IN endpoint failed (returning -EAGAIN) %d %d\n", |
| 1281 | (csr & USB_IN_CSR1_FIFO_NOT_EMPTY), |
| 1282 | !list_empty(&ep->queue)); |
| 1283 | return -EAGAIN; |
| 1284 | } |
| 1285 | flush(ep); |
| 1286 | if (value) |
| 1287 | usb_set(USB_IN_CSR1_SEND_STALL, ep->csr1); |
| 1288 | else { |
| 1289 | usb_clear(USB_IN_CSR1_SEND_STALL, ep->csr1); |
| 1290 | usb_set(USB_IN_CSR1_CLR_DATA_TOGGLE, ep->csr1); |
| 1291 | } |
| 1292 | |
| 1293 | } else { |
| 1294 | |
| 1295 | flush(ep); |
| 1296 | if (value) |
| 1297 | usb_set(USB_OUT_CSR1_SEND_STALL, ep->csr1); |
| 1298 | else { |
| 1299 | usb_clear(USB_OUT_CSR1_SEND_STALL, ep->csr1); |
| 1300 | usb_set(USB_OUT_CSR1_CLR_DATA_REG, ep->csr1); |
| 1301 | } |
| 1302 | } |
| 1303 | |
| 1304 | if (value) { |
| 1305 | ep->stopped = 1; |
| 1306 | } else { |
| 1307 | ep->stopped = 0; |
| 1308 | } |
| 1309 | |
| 1310 | spin_unlock_irqrestore(&ep->dev->lock, flags); |
| 1311 | |
| 1312 | DEBUG("%s %s halted\n", _ep->name, value == 0 ? "NOT" : "IS"); |
| 1313 | |
| 1314 | return 0; |
| 1315 | } |
| 1316 | |
| 1317 | /** Return bytes in EP FIFO |
| 1318 | * NOTE: Sets INDEX register to EP |
| 1319 | */ |
| 1320 | static int lh7a40x_fifo_status(struct usb_ep *_ep) |
| 1321 | { |
| 1322 | u32 csr; |
| 1323 | int count = 0; |
| 1324 | struct lh7a40x_ep *ep; |
| 1325 | |
| 1326 | ep = container_of(_ep, struct lh7a40x_ep, ep); |
| 1327 | if (!_ep) { |
Harvey Harrison | 441b62c | 2008-03-03 16:08:34 -0800 | [diff] [blame] | 1328 | DEBUG("%s, bad ep\n", __func__); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1329 | return -ENODEV; |
| 1330 | } |
| 1331 | |
Harvey Harrison | 441b62c | 2008-03-03 16:08:34 -0800 | [diff] [blame] | 1332 | DEBUG("%s, %d\n", __func__, ep_index(ep)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1333 | |
| 1334 | /* LPD can't report unclaimed bytes from IN fifos */ |
| 1335 | if (ep_is_in(ep)) |
| 1336 | return -EOPNOTSUPP; |
| 1337 | |
| 1338 | usb_set_index(ep_index(ep)); |
| 1339 | |
| 1340 | csr = usb_read(ep->csr1); |
| 1341 | if (ep->dev->gadget.speed != USB_SPEED_UNKNOWN || |
| 1342 | csr & USB_OUT_CSR1_OUT_PKT_RDY) { |
| 1343 | count = usb_read(USB_OUT_FIFO_WC1); |
| 1344 | } |
| 1345 | |
| 1346 | return count; |
| 1347 | } |
| 1348 | |
| 1349 | /** Flush EP FIFO |
| 1350 | * NOTE: Sets INDEX register to EP |
| 1351 | */ |
| 1352 | static void lh7a40x_fifo_flush(struct usb_ep *_ep) |
| 1353 | { |
| 1354 | struct lh7a40x_ep *ep; |
| 1355 | |
| 1356 | ep = container_of(_ep, struct lh7a40x_ep, ep); |
| 1357 | if (unlikely(!_ep || (!ep->desc && ep->ep.name != ep0name))) { |
Harvey Harrison | 441b62c | 2008-03-03 16:08:34 -0800 | [diff] [blame] | 1358 | DEBUG("%s, bad ep\n", __func__); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1359 | return; |
| 1360 | } |
| 1361 | |
| 1362 | usb_set_index(ep_index(ep)); |
| 1363 | flush(ep); |
| 1364 | } |
| 1365 | |
| 1366 | /****************************************************************/ |
| 1367 | /* End Point 0 related functions */ |
| 1368 | /****************************************************************/ |
| 1369 | |
| 1370 | /* return: 0 = still running, 1 = completed, negative = errno */ |
| 1371 | static int write_fifo_ep0(struct lh7a40x_ep *ep, struct lh7a40x_request *req) |
| 1372 | { |
| 1373 | u32 max; |
| 1374 | unsigned count; |
| 1375 | int is_last; |
| 1376 | |
| 1377 | max = ep_maxpacket(ep); |
| 1378 | |
Harvey Harrison | 441b62c | 2008-03-03 16:08:34 -0800 | [diff] [blame] | 1379 | DEBUG_EP0("%s\n", __func__); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1380 | |
| 1381 | count = write_packet(ep, req, max); |
| 1382 | |
| 1383 | /* last packet is usually short (or a zlp) */ |
| 1384 | if (unlikely(count != max)) |
| 1385 | is_last = 1; |
| 1386 | else { |
| 1387 | if (likely(req->req.length != req->req.actual) || req->req.zero) |
| 1388 | is_last = 0; |
| 1389 | else |
| 1390 | is_last = 1; |
| 1391 | } |
| 1392 | |
Harvey Harrison | 441b62c | 2008-03-03 16:08:34 -0800 | [diff] [blame] | 1393 | DEBUG_EP0("%s: wrote %s %d bytes%s %d left %p\n", __func__, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1394 | ep->ep.name, count, |
| 1395 | is_last ? "/L" : "", req->req.length - req->req.actual, req); |
| 1396 | |
| 1397 | /* requests complete when all IN data is in the FIFO */ |
| 1398 | if (is_last) { |
| 1399 | done(ep, req, 0); |
| 1400 | return 1; |
| 1401 | } |
| 1402 | |
| 1403 | return 0; |
| 1404 | } |
| 1405 | |
| 1406 | static __inline__ int lh7a40x_fifo_read(struct lh7a40x_ep *ep, |
| 1407 | unsigned char *cp, int max) |
| 1408 | { |
| 1409 | int bytes; |
| 1410 | int count = usb_read(USB_OUT_FIFO_WC1); |
| 1411 | volatile u32 *fifo = (volatile u32 *)ep->fifo; |
| 1412 | |
| 1413 | if (count > max) |
| 1414 | count = max; |
| 1415 | bytes = count; |
| 1416 | while (count--) |
| 1417 | *cp++ = *fifo & 0xFF; |
| 1418 | return bytes; |
| 1419 | } |
| 1420 | |
| 1421 | static __inline__ void lh7a40x_fifo_write(struct lh7a40x_ep *ep, |
| 1422 | unsigned char *cp, int count) |
| 1423 | { |
| 1424 | volatile u32 *fifo = (volatile u32 *)ep->fifo; |
| 1425 | DEBUG_EP0("fifo_write: %d %d\n", ep_index(ep), count); |
| 1426 | while (count--) |
| 1427 | *fifo = *cp++; |
| 1428 | } |
| 1429 | |
| 1430 | static int read_fifo_ep0(struct lh7a40x_ep *ep, struct lh7a40x_request *req) |
| 1431 | { |
| 1432 | u32 csr; |
| 1433 | u8 *buf; |
| 1434 | unsigned bufferspace, count, is_short; |
| 1435 | volatile u32 *fifo = (volatile u32 *)ep->fifo; |
| 1436 | |
Harvey Harrison | 441b62c | 2008-03-03 16:08:34 -0800 | [diff] [blame] | 1437 | DEBUG_EP0("%s\n", __func__); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1438 | |
| 1439 | csr = usb_read(USB_EP0_CSR); |
| 1440 | if (!(csr & USB_OUT_CSR1_OUT_PKT_RDY)) |
| 1441 | return 0; |
| 1442 | |
| 1443 | buf = req->req.buf + req->req.actual; |
| 1444 | prefetchw(buf); |
| 1445 | bufferspace = req->req.length - req->req.actual; |
| 1446 | |
| 1447 | /* read all bytes from this packet */ |
| 1448 | if (likely(csr & EP0_OUT_PKT_RDY)) { |
| 1449 | count = usb_read(USB_OUT_FIFO_WC1); |
| 1450 | req->req.actual += min(count, bufferspace); |
| 1451 | } else /* zlp */ |
| 1452 | count = 0; |
| 1453 | |
| 1454 | is_short = (count < ep->ep.maxpacket); |
| 1455 | DEBUG_EP0("read %s %02x, %d bytes%s req %p %d/%d\n", |
| 1456 | ep->ep.name, csr, count, |
| 1457 | is_short ? "/S" : "", req, req->req.actual, req->req.length); |
| 1458 | |
| 1459 | while (likely(count-- != 0)) { |
| 1460 | u8 byte = (u8) (*fifo & 0xff); |
| 1461 | |
| 1462 | if (unlikely(bufferspace == 0)) { |
| 1463 | /* this happens when the driver's buffer |
| 1464 | * is smaller than what the host sent. |
| 1465 | * discard the extra data. |
| 1466 | */ |
| 1467 | if (req->req.status != -EOVERFLOW) |
| 1468 | DEBUG_EP0("%s overflow %d\n", ep->ep.name, |
| 1469 | count); |
| 1470 | req->req.status = -EOVERFLOW; |
| 1471 | } else { |
| 1472 | *buf++ = byte; |
| 1473 | bufferspace--; |
| 1474 | } |
| 1475 | } |
| 1476 | |
| 1477 | /* completion */ |
| 1478 | if (is_short || req->req.actual == req->req.length) { |
| 1479 | done(ep, req, 0); |
| 1480 | return 1; |
| 1481 | } |
| 1482 | |
| 1483 | /* finished that packet. the next one may be waiting... */ |
| 1484 | return 0; |
| 1485 | } |
| 1486 | |
| 1487 | /** |
| 1488 | * udc_set_address - set the USB address for this device |
| 1489 | * @address: |
| 1490 | * |
| 1491 | * Called from control endpoint function after it decodes a set address setup packet. |
| 1492 | */ |
| 1493 | static void udc_set_address(struct lh7a40x_udc *dev, unsigned char address) |
| 1494 | { |
Harvey Harrison | 441b62c | 2008-03-03 16:08:34 -0800 | [diff] [blame] | 1495 | DEBUG_EP0("%s: %d\n", __func__, address); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1496 | /* c.f. 15.1.2.2 Table 15-4 address will be used after DATA_END is set */ |
| 1497 | dev->usb_address = address; |
| 1498 | usb_set((address & USB_FA_FUNCTION_ADDR), USB_FA); |
| 1499 | usb_set(USB_FA_ADDR_UPDATE | (address & USB_FA_FUNCTION_ADDR), USB_FA); |
| 1500 | /* usb_read(USB_FA); */ |
| 1501 | } |
| 1502 | |
| 1503 | /* |
| 1504 | * DATA_STATE_RECV (OUT_PKT_RDY) |
| 1505 | * - if error |
| 1506 | * set EP0_CLR_OUT | EP0_DATA_END | EP0_SEND_STALL bits |
| 1507 | * - else |
| 1508 | * set EP0_CLR_OUT bit |
| 1509 | if last set EP0_DATA_END bit |
| 1510 | */ |
| 1511 | static void lh7a40x_ep0_out(struct lh7a40x_udc *dev, u32 csr) |
| 1512 | { |
| 1513 | struct lh7a40x_request *req; |
| 1514 | struct lh7a40x_ep *ep = &dev->ep[0]; |
| 1515 | int ret; |
| 1516 | |
Harvey Harrison | 441b62c | 2008-03-03 16:08:34 -0800 | [diff] [blame] | 1517 | DEBUG_EP0("%s: %x\n", __func__, csr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1518 | |
| 1519 | if (list_empty(&ep->queue)) |
| 1520 | req = 0; |
| 1521 | else |
| 1522 | req = list_entry(ep->queue.next, struct lh7a40x_request, queue); |
| 1523 | |
| 1524 | if (req) { |
| 1525 | |
| 1526 | if (req->req.length == 0) { |
| 1527 | DEBUG_EP0("ZERO LENGTH OUT!\n"); |
| 1528 | usb_set((EP0_CLR_OUT | EP0_DATA_END), USB_EP0_CSR); |
| 1529 | dev->ep0state = WAIT_FOR_SETUP; |
| 1530 | return; |
| 1531 | } |
| 1532 | ret = read_fifo_ep0(ep, req); |
| 1533 | if (ret) { |
| 1534 | /* Done! */ |
| 1535 | DEBUG_EP0("%s: finished, waiting for status\n", |
Harvey Harrison | 441b62c | 2008-03-03 16:08:34 -0800 | [diff] [blame] | 1536 | __func__); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1537 | |
| 1538 | usb_set((EP0_CLR_OUT | EP0_DATA_END), USB_EP0_CSR); |
| 1539 | dev->ep0state = WAIT_FOR_SETUP; |
| 1540 | } else { |
| 1541 | /* Not done yet.. */ |
Harvey Harrison | 441b62c | 2008-03-03 16:08:34 -0800 | [diff] [blame] | 1542 | DEBUG_EP0("%s: not finished\n", __func__); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1543 | usb_set(EP0_CLR_OUT, USB_EP0_CSR); |
| 1544 | } |
| 1545 | } else { |
| 1546 | DEBUG_EP0("NO REQ??!\n"); |
| 1547 | } |
| 1548 | } |
| 1549 | |
| 1550 | /* |
| 1551 | * DATA_STATE_XMIT |
| 1552 | */ |
| 1553 | static int lh7a40x_ep0_in(struct lh7a40x_udc *dev, u32 csr) |
| 1554 | { |
| 1555 | struct lh7a40x_request *req; |
| 1556 | struct lh7a40x_ep *ep = &dev->ep[0]; |
| 1557 | int ret, need_zlp = 0; |
| 1558 | |
Harvey Harrison | 441b62c | 2008-03-03 16:08:34 -0800 | [diff] [blame] | 1559 | DEBUG_EP0("%s: %x\n", __func__, csr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1560 | |
| 1561 | if (list_empty(&ep->queue)) |
| 1562 | req = 0; |
| 1563 | else |
| 1564 | req = list_entry(ep->queue.next, struct lh7a40x_request, queue); |
| 1565 | |
| 1566 | if (!req) { |
Harvey Harrison | 441b62c | 2008-03-03 16:08:34 -0800 | [diff] [blame] | 1567 | DEBUG_EP0("%s: NULL REQ\n", __func__); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1568 | return 0; |
| 1569 | } |
| 1570 | |
| 1571 | if (req->req.length == 0) { |
| 1572 | |
| 1573 | usb_set((EP0_IN_PKT_RDY | EP0_DATA_END), USB_EP0_CSR); |
| 1574 | dev->ep0state = WAIT_FOR_SETUP; |
| 1575 | return 1; |
| 1576 | } |
| 1577 | |
| 1578 | if (req->req.length - req->req.actual == EP0_PACKETSIZE) { |
| 1579 | /* Next write will end with the packet size, */ |
| 1580 | /* so we need Zero-length-packet */ |
| 1581 | need_zlp = 1; |
| 1582 | } |
| 1583 | |
| 1584 | ret = write_fifo_ep0(ep, req); |
| 1585 | |
| 1586 | if (ret == 1 && !need_zlp) { |
| 1587 | /* Last packet */ |
Harvey Harrison | 441b62c | 2008-03-03 16:08:34 -0800 | [diff] [blame] | 1588 | DEBUG_EP0("%s: finished, waiting for status\n", __func__); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1589 | |
| 1590 | usb_set((EP0_IN_PKT_RDY | EP0_DATA_END), USB_EP0_CSR); |
| 1591 | dev->ep0state = WAIT_FOR_SETUP; |
| 1592 | } else { |
Harvey Harrison | 441b62c | 2008-03-03 16:08:34 -0800 | [diff] [blame] | 1593 | DEBUG_EP0("%s: not finished\n", __func__); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1594 | usb_set(EP0_IN_PKT_RDY, USB_EP0_CSR); |
| 1595 | } |
| 1596 | |
| 1597 | if (need_zlp) { |
Harvey Harrison | 441b62c | 2008-03-03 16:08:34 -0800 | [diff] [blame] | 1598 | DEBUG_EP0("%s: Need ZLP!\n", __func__); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1599 | usb_set(EP0_IN_PKT_RDY, USB_EP0_CSR); |
| 1600 | dev->ep0state = DATA_STATE_NEED_ZLP; |
| 1601 | } |
| 1602 | |
| 1603 | return 1; |
| 1604 | } |
| 1605 | |
| 1606 | static int lh7a40x_handle_get_status(struct lh7a40x_udc *dev, |
| 1607 | struct usb_ctrlrequest *ctrl) |
| 1608 | { |
| 1609 | struct lh7a40x_ep *ep0 = &dev->ep[0]; |
| 1610 | struct lh7a40x_ep *qep; |
| 1611 | int reqtype = (ctrl->bRequestType & USB_RECIP_MASK); |
| 1612 | u16 val = 0; |
| 1613 | |
| 1614 | if (reqtype == USB_RECIP_INTERFACE) { |
| 1615 | /* This is not supported. |
| 1616 | * And according to the USB spec, this one does nothing.. |
| 1617 | * Just return 0 |
| 1618 | */ |
| 1619 | DEBUG_SETUP("GET_STATUS: USB_RECIP_INTERFACE\n"); |
| 1620 | } else if (reqtype == USB_RECIP_DEVICE) { |
| 1621 | DEBUG_SETUP("GET_STATUS: USB_RECIP_DEVICE\n"); |
| 1622 | val |= (1 << 0); /* Self powered */ |
| 1623 | /*val |= (1<<1); *//* Remote wakeup */ |
| 1624 | } else if (reqtype == USB_RECIP_ENDPOINT) { |
| 1625 | int ep_num = (ctrl->wIndex & ~USB_DIR_IN); |
| 1626 | |
| 1627 | DEBUG_SETUP |
| 1628 | ("GET_STATUS: USB_RECIP_ENDPOINT (%d), ctrl->wLength = %d\n", |
| 1629 | ep_num, ctrl->wLength); |
| 1630 | |
| 1631 | if (ctrl->wLength > 2 || ep_num > 3) |
| 1632 | return -EOPNOTSUPP; |
| 1633 | |
| 1634 | qep = &dev->ep[ep_num]; |
| 1635 | if (ep_is_in(qep) != ((ctrl->wIndex & USB_DIR_IN) ? 1 : 0) |
| 1636 | && ep_index(qep) != 0) { |
| 1637 | return -EOPNOTSUPP; |
| 1638 | } |
| 1639 | |
| 1640 | usb_set_index(ep_index(qep)); |
| 1641 | |
| 1642 | /* Return status on next IN token */ |
| 1643 | switch (qep->ep_type) { |
| 1644 | case ep_control: |
| 1645 | val = |
| 1646 | (usb_read(qep->csr1) & EP0_SEND_STALL) == |
| 1647 | EP0_SEND_STALL; |
| 1648 | break; |
| 1649 | case ep_bulk_in: |
| 1650 | case ep_interrupt: |
| 1651 | val = |
| 1652 | (usb_read(qep->csr1) & USB_IN_CSR1_SEND_STALL) == |
| 1653 | USB_IN_CSR1_SEND_STALL; |
| 1654 | break; |
| 1655 | case ep_bulk_out: |
| 1656 | val = |
| 1657 | (usb_read(qep->csr1) & USB_OUT_CSR1_SEND_STALL) == |
| 1658 | USB_OUT_CSR1_SEND_STALL; |
| 1659 | break; |
| 1660 | } |
| 1661 | |
| 1662 | /* Back to EP0 index */ |
| 1663 | usb_set_index(0); |
| 1664 | |
| 1665 | DEBUG_SETUP("GET_STATUS, ep: %d (%x), val = %d\n", ep_num, |
| 1666 | ctrl->wIndex, val); |
| 1667 | } else { |
| 1668 | DEBUG_SETUP("Unknown REQ TYPE: %d\n", reqtype); |
| 1669 | return -EOPNOTSUPP; |
| 1670 | } |
| 1671 | |
| 1672 | /* Clear "out packet ready" */ |
| 1673 | usb_set((EP0_CLR_OUT), USB_EP0_CSR); |
| 1674 | /* Put status to FIFO */ |
| 1675 | lh7a40x_fifo_write(ep0, (u8 *) & val, sizeof(val)); |
| 1676 | /* Issue "In packet ready" */ |
| 1677 | usb_set((EP0_IN_PKT_RDY | EP0_DATA_END), USB_EP0_CSR); |
| 1678 | |
| 1679 | return 0; |
| 1680 | } |
| 1681 | |
| 1682 | /* |
| 1683 | * WAIT_FOR_SETUP (OUT_PKT_RDY) |
| 1684 | * - read data packet from EP0 FIFO |
| 1685 | * - decode command |
| 1686 | * - if error |
| 1687 | * set EP0_CLR_OUT | EP0_DATA_END | EP0_SEND_STALL bits |
| 1688 | * - else |
| 1689 | * set EP0_CLR_OUT | EP0_DATA_END bits |
| 1690 | */ |
| 1691 | static void lh7a40x_ep0_setup(struct lh7a40x_udc *dev, u32 csr) |
| 1692 | { |
| 1693 | struct lh7a40x_ep *ep = &dev->ep[0]; |
| 1694 | struct usb_ctrlrequest ctrl; |
| 1695 | int i, bytes, is_in; |
| 1696 | |
Harvey Harrison | 441b62c | 2008-03-03 16:08:34 -0800 | [diff] [blame] | 1697 | DEBUG_SETUP("%s: %x\n", __func__, csr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1698 | |
| 1699 | /* Nuke all previous transfers */ |
| 1700 | nuke(ep, -EPROTO); |
| 1701 | |
| 1702 | /* read control req from fifo (8 bytes) */ |
| 1703 | bytes = lh7a40x_fifo_read(ep, (unsigned char *)&ctrl, 8); |
| 1704 | |
| 1705 | DEBUG_SETUP("Read CTRL REQ %d bytes\n", bytes); |
| 1706 | DEBUG_SETUP("CTRL.bRequestType = %d (is_in %d)\n", ctrl.bRequestType, |
| 1707 | ctrl.bRequestType == USB_DIR_IN); |
| 1708 | DEBUG_SETUP("CTRL.bRequest = %d\n", ctrl.bRequest); |
| 1709 | DEBUG_SETUP("CTRL.wLength = %d\n", ctrl.wLength); |
| 1710 | DEBUG_SETUP("CTRL.wValue = %d (%d)\n", ctrl.wValue, ctrl.wValue >> 8); |
| 1711 | DEBUG_SETUP("CTRL.wIndex = %d\n", ctrl.wIndex); |
| 1712 | |
| 1713 | /* Set direction of EP0 */ |
| 1714 | if (likely(ctrl.bRequestType & USB_DIR_IN)) { |
| 1715 | ep->bEndpointAddress |= USB_DIR_IN; |
| 1716 | is_in = 1; |
| 1717 | } else { |
| 1718 | ep->bEndpointAddress &= ~USB_DIR_IN; |
| 1719 | is_in = 0; |
| 1720 | } |
| 1721 | |
| 1722 | dev->req_pending = 1; |
| 1723 | |
| 1724 | /* Handle some SETUP packets ourselves */ |
| 1725 | switch (ctrl.bRequest) { |
| 1726 | case USB_REQ_SET_ADDRESS: |
| 1727 | if (ctrl.bRequestType != (USB_TYPE_STANDARD | USB_RECIP_DEVICE)) |
| 1728 | break; |
| 1729 | |
| 1730 | DEBUG_SETUP("USB_REQ_SET_ADDRESS (%d)\n", ctrl.wValue); |
| 1731 | udc_set_address(dev, ctrl.wValue); |
| 1732 | usb_set((EP0_CLR_OUT | EP0_DATA_END), USB_EP0_CSR); |
| 1733 | return; |
| 1734 | |
| 1735 | case USB_REQ_GET_STATUS:{ |
| 1736 | if (lh7a40x_handle_get_status(dev, &ctrl) == 0) |
| 1737 | return; |
| 1738 | |
| 1739 | case USB_REQ_CLEAR_FEATURE: |
| 1740 | case USB_REQ_SET_FEATURE: |
| 1741 | if (ctrl.bRequestType == USB_RECIP_ENDPOINT) { |
| 1742 | struct lh7a40x_ep *qep; |
| 1743 | int ep_num = (ctrl.wIndex & 0x0f); |
| 1744 | |
| 1745 | /* Support only HALT feature */ |
| 1746 | if (ctrl.wValue != 0 || ctrl.wLength != 0 |
| 1747 | || ep_num > 3 || ep_num < 1) |
| 1748 | break; |
| 1749 | |
| 1750 | qep = &dev->ep[ep_num]; |
Franck Bui-Huu | d5ec334 | 2006-02-23 09:35:06 +0100 | [diff] [blame] | 1751 | spin_unlock(&dev->lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1752 | if (ctrl.bRequest == USB_REQ_SET_FEATURE) { |
| 1753 | DEBUG_SETUP("SET_FEATURE (%d)\n", |
| 1754 | ep_num); |
| 1755 | lh7a40x_set_halt(&qep->ep, 1); |
| 1756 | } else { |
| 1757 | DEBUG_SETUP("CLR_FEATURE (%d)\n", |
| 1758 | ep_num); |
| 1759 | lh7a40x_set_halt(&qep->ep, 0); |
| 1760 | } |
Franck Bui-Huu | d5ec334 | 2006-02-23 09:35:06 +0100 | [diff] [blame] | 1761 | spin_lock(&dev->lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1762 | usb_set_index(0); |
| 1763 | |
| 1764 | /* Reply with a ZLP on next IN token */ |
| 1765 | usb_set((EP0_CLR_OUT | EP0_DATA_END), |
| 1766 | USB_EP0_CSR); |
| 1767 | return; |
| 1768 | } |
| 1769 | break; |
| 1770 | } |
| 1771 | |
| 1772 | default: |
| 1773 | break; |
| 1774 | } |
| 1775 | |
| 1776 | if (likely(dev->driver)) { |
| 1777 | /* device-2-host (IN) or no data setup command, process immediately */ |
| 1778 | spin_unlock(&dev->lock); |
| 1779 | i = dev->driver->setup(&dev->gadget, &ctrl); |
| 1780 | spin_lock(&dev->lock); |
| 1781 | |
| 1782 | if (i < 0) { |
| 1783 | /* setup processing failed, force stall */ |
| 1784 | DEBUG_SETUP |
| 1785 | (" --> ERROR: gadget setup FAILED (stalling), setup returned %d\n", |
| 1786 | i); |
| 1787 | usb_set_index(0); |
| 1788 | usb_set((EP0_CLR_OUT | EP0_DATA_END | EP0_SEND_STALL), |
| 1789 | USB_EP0_CSR); |
| 1790 | |
| 1791 | /* ep->stopped = 1; */ |
| 1792 | dev->ep0state = WAIT_FOR_SETUP; |
| 1793 | } |
| 1794 | } |
| 1795 | } |
| 1796 | |
| 1797 | /* |
| 1798 | * DATA_STATE_NEED_ZLP |
| 1799 | */ |
| 1800 | static void lh7a40x_ep0_in_zlp(struct lh7a40x_udc *dev, u32 csr) |
| 1801 | { |
Harvey Harrison | 441b62c | 2008-03-03 16:08:34 -0800 | [diff] [blame] | 1802 | DEBUG_EP0("%s: %x\n", __func__, csr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1803 | |
| 1804 | /* c.f. Table 15-14 */ |
| 1805 | usb_set((EP0_IN_PKT_RDY | EP0_DATA_END), USB_EP0_CSR); |
| 1806 | dev->ep0state = WAIT_FOR_SETUP; |
| 1807 | } |
| 1808 | |
| 1809 | /* |
| 1810 | * handle ep0 interrupt |
| 1811 | */ |
| 1812 | static void lh7a40x_handle_ep0(struct lh7a40x_udc *dev, u32 intr) |
| 1813 | { |
| 1814 | struct lh7a40x_ep *ep = &dev->ep[0]; |
| 1815 | u32 csr; |
| 1816 | |
| 1817 | /* Set index 0 */ |
| 1818 | usb_set_index(0); |
| 1819 | csr = usb_read(USB_EP0_CSR); |
| 1820 | |
Harvey Harrison | 441b62c | 2008-03-03 16:08:34 -0800 | [diff] [blame] | 1821 | DEBUG_EP0("%s: csr = %x\n", __func__, csr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1822 | |
| 1823 | /* |
| 1824 | * For overview of what we should be doing see c.f. Chapter 18.1.2.4 |
| 1825 | * We will follow that outline here modified by our own global state |
| 1826 | * indication which provides hints as to what we think should be |
| 1827 | * happening.. |
| 1828 | */ |
| 1829 | |
| 1830 | /* |
| 1831 | * if SENT_STALL is set |
| 1832 | * - clear the SENT_STALL bit |
| 1833 | */ |
| 1834 | if (csr & EP0_SENT_STALL) { |
Harvey Harrison | 441b62c | 2008-03-03 16:08:34 -0800 | [diff] [blame] | 1835 | DEBUG_EP0("%s: EP0_SENT_STALL is set: %x\n", __func__, csr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1836 | usb_clear((EP0_SENT_STALL | EP0_SEND_STALL), USB_EP0_CSR); |
| 1837 | nuke(ep, -ECONNABORTED); |
| 1838 | dev->ep0state = WAIT_FOR_SETUP; |
| 1839 | return; |
| 1840 | } |
| 1841 | |
| 1842 | /* |
| 1843 | * if a transfer is in progress && IN_PKT_RDY and OUT_PKT_RDY are clear |
| 1844 | * - fill EP0 FIFO |
| 1845 | * - if last packet |
| 1846 | * - set IN_PKT_RDY | DATA_END |
| 1847 | * - else |
| 1848 | * set IN_PKT_RDY |
| 1849 | */ |
| 1850 | if (!(csr & (EP0_IN_PKT_RDY | EP0_OUT_PKT_RDY))) { |
| 1851 | DEBUG_EP0("%s: IN_PKT_RDY and OUT_PKT_RDY are clear\n", |
Harvey Harrison | 441b62c | 2008-03-03 16:08:34 -0800 | [diff] [blame] | 1852 | __func__); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1853 | |
| 1854 | switch (dev->ep0state) { |
| 1855 | case DATA_STATE_XMIT: |
| 1856 | DEBUG_EP0("continue with DATA_STATE_XMIT\n"); |
| 1857 | lh7a40x_ep0_in(dev, csr); |
| 1858 | return; |
| 1859 | case DATA_STATE_NEED_ZLP: |
| 1860 | DEBUG_EP0("continue with DATA_STATE_NEED_ZLP\n"); |
| 1861 | lh7a40x_ep0_in_zlp(dev, csr); |
| 1862 | return; |
| 1863 | default: |
| 1864 | /* Stall? */ |
| 1865 | DEBUG_EP0("Odd state!! state = %s\n", |
| 1866 | state_names[dev->ep0state]); |
| 1867 | dev->ep0state = WAIT_FOR_SETUP; |
| 1868 | /* nuke(ep, 0); */ |
| 1869 | /* usb_set(EP0_SEND_STALL, ep->csr1); */ |
| 1870 | break; |
| 1871 | } |
| 1872 | } |
| 1873 | |
| 1874 | /* |
| 1875 | * if SETUP_END is set |
| 1876 | * - abort the last transfer |
| 1877 | * - set SERVICED_SETUP_END_BIT |
| 1878 | */ |
| 1879 | if (csr & EP0_SETUP_END) { |
Harvey Harrison | 441b62c | 2008-03-03 16:08:34 -0800 | [diff] [blame] | 1880 | DEBUG_EP0("%s: EP0_SETUP_END is set: %x\n", __func__, csr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1881 | |
| 1882 | usb_set(EP0_CLR_SETUP_END, USB_EP0_CSR); |
| 1883 | |
| 1884 | nuke(ep, 0); |
| 1885 | dev->ep0state = WAIT_FOR_SETUP; |
| 1886 | } |
| 1887 | |
| 1888 | /* |
| 1889 | * if EP0_OUT_PKT_RDY is set |
| 1890 | * - read data packet from EP0 FIFO |
| 1891 | * - decode command |
| 1892 | * - if error |
| 1893 | * set SERVICED_OUT_PKT_RDY | DATA_END bits | SEND_STALL |
| 1894 | * - else |
| 1895 | * set SERVICED_OUT_PKT_RDY | DATA_END bits |
| 1896 | */ |
| 1897 | if (csr & EP0_OUT_PKT_RDY) { |
| 1898 | |
Harvey Harrison | 441b62c | 2008-03-03 16:08:34 -0800 | [diff] [blame] | 1899 | DEBUG_EP0("%s: EP0_OUT_PKT_RDY is set: %x\n", __func__, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1900 | csr); |
| 1901 | |
| 1902 | switch (dev->ep0state) { |
| 1903 | case WAIT_FOR_SETUP: |
| 1904 | DEBUG_EP0("WAIT_FOR_SETUP\n"); |
| 1905 | lh7a40x_ep0_setup(dev, csr); |
| 1906 | break; |
| 1907 | |
| 1908 | case DATA_STATE_RECV: |
| 1909 | DEBUG_EP0("DATA_STATE_RECV\n"); |
| 1910 | lh7a40x_ep0_out(dev, csr); |
| 1911 | break; |
| 1912 | |
| 1913 | default: |
| 1914 | /* send stall? */ |
| 1915 | DEBUG_EP0("strange state!! 2. send stall? state = %d\n", |
| 1916 | dev->ep0state); |
| 1917 | break; |
| 1918 | } |
| 1919 | } |
| 1920 | } |
| 1921 | |
| 1922 | static void lh7a40x_ep0_kick(struct lh7a40x_udc *dev, struct lh7a40x_ep *ep) |
| 1923 | { |
| 1924 | u32 csr; |
| 1925 | |
| 1926 | usb_set_index(0); |
| 1927 | csr = usb_read(USB_EP0_CSR); |
| 1928 | |
Harvey Harrison | 441b62c | 2008-03-03 16:08:34 -0800 | [diff] [blame] | 1929 | DEBUG_EP0("%s: %x\n", __func__, csr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1930 | |
| 1931 | /* Clear "out packet ready" */ |
| 1932 | usb_set(EP0_CLR_OUT, USB_EP0_CSR); |
| 1933 | |
| 1934 | if (ep_is_in(ep)) { |
| 1935 | dev->ep0state = DATA_STATE_XMIT; |
| 1936 | lh7a40x_ep0_in(dev, csr); |
| 1937 | } else { |
| 1938 | dev->ep0state = DATA_STATE_RECV; |
| 1939 | lh7a40x_ep0_out(dev, csr); |
| 1940 | } |
| 1941 | } |
| 1942 | |
| 1943 | /* --------------------------------------------------------------------------- |
| 1944 | * device-scoped parts of the api to the usb controller hardware |
| 1945 | * --------------------------------------------------------------------------- |
| 1946 | */ |
| 1947 | |
| 1948 | static int lh7a40x_udc_get_frame(struct usb_gadget *_gadget) |
| 1949 | { |
| 1950 | u32 frame1 = usb_read(USB_FRM_NUM1); /* Least significant 8 bits */ |
| 1951 | u32 frame2 = usb_read(USB_FRM_NUM2); /* Most significant 3 bits */ |
Harvey Harrison | 441b62c | 2008-03-03 16:08:34 -0800 | [diff] [blame] | 1952 | DEBUG("%s, %p\n", __func__, _gadget); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1953 | return ((frame2 & 0x07) << 8) | (frame1 & 0xff); |
| 1954 | } |
| 1955 | |
| 1956 | static int lh7a40x_udc_wakeup(struct usb_gadget *_gadget) |
| 1957 | { |
| 1958 | /* host may not have enabled remote wakeup */ |
| 1959 | /*if ((UDCCS0 & UDCCS0_DRWF) == 0) |
| 1960 | return -EHOSTUNREACH; |
| 1961 | udc_set_mask_UDCCR(UDCCR_RSM); */ |
| 1962 | return -ENOTSUPP; |
| 1963 | } |
| 1964 | |
| 1965 | static const struct usb_gadget_ops lh7a40x_udc_ops = { |
| 1966 | .get_frame = lh7a40x_udc_get_frame, |
| 1967 | .wakeup = lh7a40x_udc_wakeup, |
| 1968 | /* current versions must always be self-powered */ |
| 1969 | }; |
| 1970 | |
| 1971 | static void nop_release(struct device *dev) |
| 1972 | { |
Harvey Harrison | 441b62c | 2008-03-03 16:08:34 -0800 | [diff] [blame] | 1973 | DEBUG("%s %s\n", __func__, dev->bus_id); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1974 | } |
| 1975 | |
| 1976 | static struct lh7a40x_udc memory = { |
| 1977 | .usb_address = 0, |
| 1978 | |
| 1979 | .gadget = { |
| 1980 | .ops = &lh7a40x_udc_ops, |
| 1981 | .ep0 = &memory.ep[0].ep, |
| 1982 | .name = driver_name, |
| 1983 | .dev = { |
| 1984 | .bus_id = "gadget", |
| 1985 | .release = nop_release, |
| 1986 | }, |
| 1987 | }, |
| 1988 | |
| 1989 | /* control endpoint */ |
| 1990 | .ep[0] = { |
| 1991 | .ep = { |
| 1992 | .name = ep0name, |
| 1993 | .ops = &lh7a40x_ep_ops, |
| 1994 | .maxpacket = EP0_PACKETSIZE, |
| 1995 | }, |
| 1996 | .dev = &memory, |
| 1997 | |
| 1998 | .bEndpointAddress = 0, |
| 1999 | .bmAttributes = 0, |
| 2000 | |
| 2001 | .ep_type = ep_control, |
| 2002 | .fifo = io_p2v(USB_EP0_FIFO), |
| 2003 | .csr1 = USB_EP0_CSR, |
| 2004 | .csr2 = USB_EP0_CSR, |
| 2005 | }, |
| 2006 | |
| 2007 | /* first group of endpoints */ |
| 2008 | .ep[1] = { |
| 2009 | .ep = { |
| 2010 | .name = "ep1in-bulk", |
| 2011 | .ops = &lh7a40x_ep_ops, |
| 2012 | .maxpacket = 64, |
| 2013 | }, |
| 2014 | .dev = &memory, |
| 2015 | |
| 2016 | .bEndpointAddress = USB_DIR_IN | 1, |
| 2017 | .bmAttributes = USB_ENDPOINT_XFER_BULK, |
| 2018 | |
| 2019 | .ep_type = ep_bulk_in, |
| 2020 | .fifo = io_p2v(USB_EP1_FIFO), |
| 2021 | .csr1 = USB_IN_CSR1, |
| 2022 | .csr2 = USB_IN_CSR2, |
| 2023 | }, |
| 2024 | |
| 2025 | .ep[2] = { |
| 2026 | .ep = { |
| 2027 | .name = "ep2out-bulk", |
| 2028 | .ops = &lh7a40x_ep_ops, |
| 2029 | .maxpacket = 64, |
| 2030 | }, |
| 2031 | .dev = &memory, |
| 2032 | |
| 2033 | .bEndpointAddress = 2, |
| 2034 | .bmAttributes = USB_ENDPOINT_XFER_BULK, |
| 2035 | |
| 2036 | .ep_type = ep_bulk_out, |
| 2037 | .fifo = io_p2v(USB_EP2_FIFO), |
| 2038 | .csr1 = USB_OUT_CSR1, |
| 2039 | .csr2 = USB_OUT_CSR2, |
| 2040 | }, |
| 2041 | |
| 2042 | .ep[3] = { |
| 2043 | .ep = { |
| 2044 | .name = "ep3in-int", |
| 2045 | .ops = &lh7a40x_ep_ops, |
| 2046 | .maxpacket = 64, |
| 2047 | }, |
| 2048 | .dev = &memory, |
| 2049 | |
| 2050 | .bEndpointAddress = USB_DIR_IN | 3, |
| 2051 | .bmAttributes = USB_ENDPOINT_XFER_INT, |
| 2052 | |
| 2053 | .ep_type = ep_interrupt, |
| 2054 | .fifo = io_p2v(USB_EP3_FIFO), |
| 2055 | .csr1 = USB_IN_CSR1, |
| 2056 | .csr2 = USB_IN_CSR2, |
| 2057 | }, |
| 2058 | }; |
| 2059 | |
| 2060 | /* |
| 2061 | * probe - binds to the platform device |
| 2062 | */ |
Russell King | 3ae5eae | 2005-11-09 22:32:44 +0000 | [diff] [blame] | 2063 | static int lh7a40x_udc_probe(struct platform_device *pdev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2064 | { |
| 2065 | struct lh7a40x_udc *dev = &memory; |
| 2066 | int retval; |
| 2067 | |
Harvey Harrison | 441b62c | 2008-03-03 16:08:34 -0800 | [diff] [blame] | 2068 | DEBUG("%s: %p\n", __func__, pdev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2069 | |
| 2070 | spin_lock_init(&dev->lock); |
Russell King | 3ae5eae | 2005-11-09 22:32:44 +0000 | [diff] [blame] | 2071 | dev->dev = &pdev->dev; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2072 | |
| 2073 | device_initialize(&dev->gadget.dev); |
Russell King | 3ae5eae | 2005-11-09 22:32:44 +0000 | [diff] [blame] | 2074 | dev->gadget.dev.parent = &pdev->dev; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2075 | |
| 2076 | the_controller = dev; |
Russell King | 3ae5eae | 2005-11-09 22:32:44 +0000 | [diff] [blame] | 2077 | platform_set_drvdata(pdev, dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2078 | |
| 2079 | udc_disable(dev); |
| 2080 | udc_reinit(dev); |
| 2081 | |
| 2082 | /* irq setup after old hardware state is cleaned up */ |
| 2083 | retval = |
Thomas Gleixner | d54b5ca | 2006-07-01 19:29:44 -0700 | [diff] [blame] | 2084 | request_irq(IRQ_USBINTR, lh7a40x_udc_irq, IRQF_DISABLED, driver_name, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2085 | dev); |
| 2086 | if (retval != 0) { |
| 2087 | DEBUG(KERN_ERR "%s: can't get irq %i, err %d\n", driver_name, |
| 2088 | IRQ_USBINTR, retval); |
| 2089 | return -EBUSY; |
| 2090 | } |
| 2091 | |
| 2092 | create_proc_files(); |
| 2093 | |
| 2094 | return retval; |
| 2095 | } |
| 2096 | |
Russell King | 3ae5eae | 2005-11-09 22:32:44 +0000 | [diff] [blame] | 2097 | static int lh7a40x_udc_remove(struct platform_device *pdev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2098 | { |
Russell King | 3ae5eae | 2005-11-09 22:32:44 +0000 | [diff] [blame] | 2099 | struct lh7a40x_udc *dev = platform_get_drvdata(pdev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2100 | |
Harvey Harrison | 441b62c | 2008-03-03 16:08:34 -0800 | [diff] [blame] | 2101 | DEBUG("%s: %p\n", __func__, pdev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2102 | |
David Brownell | 6bea476 | 2006-12-05 03:15:33 -0800 | [diff] [blame] | 2103 | if (dev->driver) |
| 2104 | return -EBUSY; |
| 2105 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2106 | udc_disable(dev); |
| 2107 | remove_proc_files(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2108 | |
| 2109 | free_irq(IRQ_USBINTR, dev); |
| 2110 | |
Russell King | 3ae5eae | 2005-11-09 22:32:44 +0000 | [diff] [blame] | 2111 | platform_set_drvdata(pdev, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2112 | |
| 2113 | the_controller = 0; |
| 2114 | |
| 2115 | return 0; |
| 2116 | } |
| 2117 | |
| 2118 | /*-------------------------------------------------------------------------*/ |
| 2119 | |
Russell King | 3ae5eae | 2005-11-09 22:32:44 +0000 | [diff] [blame] | 2120 | static struct platform_driver udc_driver = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2121 | .probe = lh7a40x_udc_probe, |
Russell King | 0f1482f | 2006-07-03 15:32:47 +0100 | [diff] [blame] | 2122 | .remove = lh7a40x_udc_remove, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2123 | /* FIXME power management support */ |
| 2124 | /* .suspend = ... disable UDC */ |
| 2125 | /* .resume = ... re-enable UDC */ |
Russell King | 3ae5eae | 2005-11-09 22:32:44 +0000 | [diff] [blame] | 2126 | .driver = { |
| 2127 | .name = (char *)driver_name, |
| 2128 | .owner = THIS_MODULE, |
| 2129 | }, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2130 | }; |
| 2131 | |
| 2132 | static int __init udc_init(void) |
| 2133 | { |
Harvey Harrison | 441b62c | 2008-03-03 16:08:34 -0800 | [diff] [blame] | 2134 | DEBUG("%s: %s version %s\n", __func__, driver_name, DRIVER_VERSION); |
Russell King | 3ae5eae | 2005-11-09 22:32:44 +0000 | [diff] [blame] | 2135 | return platform_driver_register(&udc_driver); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2136 | } |
| 2137 | |
| 2138 | static void __exit udc_exit(void) |
| 2139 | { |
Russell King | 3ae5eae | 2005-11-09 22:32:44 +0000 | [diff] [blame] | 2140 | platform_driver_unregister(&udc_driver); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2141 | } |
| 2142 | |
| 2143 | module_init(udc_init); |
| 2144 | module_exit(udc_exit); |
| 2145 | |
| 2146 | MODULE_DESCRIPTION(DRIVER_DESC); |
| 2147 | MODULE_AUTHOR("Mikko Lahteenmaki, Bo Henriksen"); |
| 2148 | MODULE_LICENSE("GPL"); |
Kay Sievers | f34c32f | 2008-04-10 21:29:21 -0700 | [diff] [blame] | 2149 | MODULE_ALIAS("platform:lh7a40x_udc"); |