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> |
Tejun Heo | 5a0e3ad | 2010-03-24 17:04:11 +0900 | [diff] [blame] | 25 | #include <linux/slab.h> |
Russell King | d052d1b | 2005-10-29 19:07:23 +0100 | [diff] [blame] | 26 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 27 | #include "lh7a40x_udc.h" |
| 28 | |
| 29 | //#define DEBUG printk |
| 30 | //#define DEBUG_EP0 printk |
| 31 | //#define DEBUG_SETUP printk |
| 32 | |
| 33 | #ifndef DEBUG_EP0 |
| 34 | # define DEBUG_EP0(fmt,args...) |
| 35 | #endif |
| 36 | #ifndef DEBUG_SETUP |
| 37 | # define DEBUG_SETUP(fmt,args...) |
| 38 | #endif |
| 39 | #ifndef DEBUG |
| 40 | # define NO_STATES |
| 41 | # define DEBUG(fmt,args...) |
| 42 | #endif |
| 43 | |
| 44 | #define DRIVER_DESC "LH7A40x USB Device Controller" |
| 45 | #define DRIVER_VERSION __DATE__ |
| 46 | |
| 47 | #ifndef _BIT /* FIXME - what happended to _BIT in 2.6.7bk18? */ |
| 48 | #define _BIT(x) (1<<(x)) |
| 49 | #endif |
| 50 | |
| 51 | struct lh7a40x_udc *the_controller; |
| 52 | |
| 53 | static const char driver_name[] = "lh7a40x_udc"; |
| 54 | static const char driver_desc[] = DRIVER_DESC; |
| 55 | static const char ep0name[] = "ep0-control"; |
| 56 | |
| 57 | /* |
| 58 | Local definintions. |
| 59 | */ |
| 60 | |
| 61 | #ifndef NO_STATES |
| 62 | static char *state_names[] = { |
| 63 | "WAIT_FOR_SETUP", |
| 64 | "DATA_STATE_XMIT", |
| 65 | "DATA_STATE_NEED_ZLP", |
| 66 | "WAIT_FOR_OUT_STATUS", |
| 67 | "DATA_STATE_RECV" |
| 68 | }; |
| 69 | #endif |
| 70 | |
| 71 | /* |
| 72 | Local declarations. |
| 73 | */ |
| 74 | static int lh7a40x_ep_enable(struct usb_ep *ep, |
| 75 | const struct usb_endpoint_descriptor *); |
| 76 | static int lh7a40x_ep_disable(struct usb_ep *ep); |
Al Viro | 55016f1 | 2005-10-21 03:21:58 -0400 | [diff] [blame] | 77 | 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] | 78 | static void lh7a40x_free_request(struct usb_ep *ep, struct usb_request *); |
Al Viro | 55016f1 | 2005-10-21 03:21:58 -0400 | [diff] [blame] | 79 | 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] | 80 | static int lh7a40x_dequeue(struct usb_ep *ep, struct usb_request *); |
| 81 | static int lh7a40x_set_halt(struct usb_ep *ep, int); |
| 82 | static int lh7a40x_fifo_status(struct usb_ep *ep); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 83 | static void lh7a40x_fifo_flush(struct usb_ep *ep); |
| 84 | static void lh7a40x_ep0_kick(struct lh7a40x_udc *dev, struct lh7a40x_ep *ep); |
| 85 | static void lh7a40x_handle_ep0(struct lh7a40x_udc *dev, u32 intr); |
| 86 | |
| 87 | static void done(struct lh7a40x_ep *ep, struct lh7a40x_request *req, |
| 88 | int status); |
| 89 | static void pio_irq_enable(int bEndpointAddress); |
| 90 | static void pio_irq_disable(int bEndpointAddress); |
| 91 | static void stop_activity(struct lh7a40x_udc *dev, |
| 92 | struct usb_gadget_driver *driver); |
| 93 | static void flush(struct lh7a40x_ep *ep); |
| 94 | static void udc_enable(struct lh7a40x_udc *dev); |
| 95 | static void udc_set_address(struct lh7a40x_udc *dev, unsigned char address); |
| 96 | |
| 97 | static struct usb_ep_ops lh7a40x_ep_ops = { |
| 98 | .enable = lh7a40x_ep_enable, |
| 99 | .disable = lh7a40x_ep_disable, |
| 100 | |
| 101 | .alloc_request = lh7a40x_alloc_request, |
| 102 | .free_request = lh7a40x_free_request, |
| 103 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 104 | .queue = lh7a40x_queue, |
| 105 | .dequeue = lh7a40x_dequeue, |
| 106 | |
| 107 | .set_halt = lh7a40x_set_halt, |
| 108 | .fifo_status = lh7a40x_fifo_status, |
| 109 | .fifo_flush = lh7a40x_fifo_flush, |
| 110 | }; |
| 111 | |
| 112 | /* Inline code */ |
| 113 | |
| 114 | static __inline__ int write_packet(struct lh7a40x_ep *ep, |
| 115 | struct lh7a40x_request *req, int max) |
| 116 | { |
| 117 | u8 *buf; |
| 118 | int length, count; |
| 119 | volatile u32 *fifo = (volatile u32 *)ep->fifo; |
| 120 | |
| 121 | buf = req->req.buf + req->req.actual; |
| 122 | prefetch(buf); |
| 123 | |
| 124 | length = req->req.length - req->req.actual; |
| 125 | length = min(length, max); |
| 126 | req->req.actual += length; |
| 127 | |
| 128 | DEBUG("Write %d (max %d), fifo %p\n", length, max, fifo); |
| 129 | |
| 130 | count = length; |
| 131 | while (count--) { |
| 132 | *fifo = *buf++; |
| 133 | } |
| 134 | |
| 135 | return length; |
| 136 | } |
| 137 | |
| 138 | static __inline__ void usb_set_index(u32 ep) |
| 139 | { |
| 140 | *(volatile u32 *)io_p2v(USB_INDEX) = ep; |
| 141 | } |
| 142 | |
| 143 | static __inline__ u32 usb_read(u32 port) |
| 144 | { |
| 145 | return *(volatile u32 *)io_p2v(port); |
| 146 | } |
| 147 | |
| 148 | static __inline__ void usb_write(u32 val, u32 port) |
| 149 | { |
| 150 | *(volatile u32 *)io_p2v(port) = val; |
| 151 | } |
| 152 | |
| 153 | static __inline__ void usb_set(u32 val, u32 port) |
| 154 | { |
| 155 | volatile u32 *ioport = (volatile u32 *)io_p2v(port); |
| 156 | u32 after = (*ioport) | val; |
| 157 | *ioport = after; |
| 158 | } |
| 159 | |
| 160 | static __inline__ void usb_clear(u32 val, u32 port) |
| 161 | { |
| 162 | volatile u32 *ioport = (volatile u32 *)io_p2v(port); |
| 163 | u32 after = (*ioport) & ~val; |
| 164 | *ioport = after; |
| 165 | } |
| 166 | |
| 167 | /*-------------------------------------------------------------------------*/ |
| 168 | |
| 169 | #define GPIO_PORTC_DR (0x80000E08) |
| 170 | #define GPIO_PORTC_DDR (0x80000E18) |
| 171 | #define GPIO_PORTC_PDR (0x80000E70) |
| 172 | |
| 173 | /* get port C pin data register */ |
| 174 | #define get_portc_pdr(bit) ((usb_read(GPIO_PORTC_PDR) & _BIT(bit)) != 0) |
| 175 | /* get port C data direction register */ |
| 176 | #define get_portc_ddr(bit) ((usb_read(GPIO_PORTC_DDR) & _BIT(bit)) != 0) |
| 177 | /* set port C data register */ |
| 178 | #define set_portc_dr(bit, val) (val ? usb_set(_BIT(bit), GPIO_PORTC_DR) : usb_clear(_BIT(bit), GPIO_PORTC_DR)) |
| 179 | /* set port C data direction register */ |
| 180 | #define set_portc_ddr(bit, val) (val ? usb_set(_BIT(bit), GPIO_PORTC_DDR) : usb_clear(_BIT(bit), GPIO_PORTC_DDR)) |
| 181 | |
| 182 | /* |
| 183 | * LPD7A404 GPIO's: |
| 184 | * Port C bit 1 = USB Port 1 Power Enable |
| 185 | * Port C bit 2 = USB Port 1 Data Carrier Detect |
| 186 | */ |
| 187 | #define is_usb_connected() get_portc_pdr(2) |
| 188 | |
| 189 | #ifdef CONFIG_USB_GADGET_DEBUG_FILES |
| 190 | |
| 191 | static const char proc_node_name[] = "driver/udc"; |
| 192 | |
| 193 | static int |
| 194 | udc_proc_read(char *page, char **start, off_t off, int count, |
| 195 | int *eof, void *_dev) |
| 196 | { |
| 197 | char *buf = page; |
| 198 | struct lh7a40x_udc *dev = _dev; |
| 199 | char *next = buf; |
| 200 | unsigned size = count; |
| 201 | unsigned long flags; |
| 202 | int t; |
| 203 | |
| 204 | if (off != 0) |
| 205 | return 0; |
| 206 | |
| 207 | local_irq_save(flags); |
| 208 | |
| 209 | /* basic device status */ |
| 210 | t = scnprintf(next, size, |
| 211 | DRIVER_DESC "\n" |
| 212 | "%s version: %s\n" |
| 213 | "Gadget driver: %s\n" |
| 214 | "Host: %s\n\n", |
| 215 | driver_name, DRIVER_VERSION, |
| 216 | dev->driver ? dev->driver->driver.name : "(none)", |
| 217 | is_usb_connected()? "full speed" : "disconnected"); |
| 218 | size -= t; |
| 219 | next += t; |
| 220 | |
| 221 | t = scnprintf(next, size, |
| 222 | "GPIO:\n" |
| 223 | " Port C bit 1: %d, dir %d\n" |
| 224 | " Port C bit 2: %d, dir %d\n\n", |
| 225 | get_portc_pdr(1), get_portc_ddr(1), |
| 226 | get_portc_pdr(2), get_portc_ddr(2) |
| 227 | ); |
| 228 | size -= t; |
| 229 | next += t; |
| 230 | |
| 231 | t = scnprintf(next, size, |
| 232 | "DCP pullup: %d\n\n", |
| 233 | (usb_read(USB_PM) & PM_USB_DCP) != 0); |
| 234 | size -= t; |
| 235 | next += t; |
| 236 | |
| 237 | local_irq_restore(flags); |
| 238 | *eof = 1; |
| 239 | return count - size; |
| 240 | } |
| 241 | |
| 242 | #define create_proc_files() create_proc_read_entry(proc_node_name, 0, NULL, udc_proc_read, dev) |
| 243 | #define remove_proc_files() remove_proc_entry(proc_node_name, NULL) |
| 244 | |
| 245 | #else /* !CONFIG_USB_GADGET_DEBUG_FILES */ |
| 246 | |
| 247 | #define create_proc_files() do {} while (0) |
| 248 | #define remove_proc_files() do {} while (0) |
| 249 | |
| 250 | #endif /* CONFIG_USB_GADGET_DEBUG_FILES */ |
| 251 | |
| 252 | /* |
| 253 | * udc_disable - disable USB device controller |
| 254 | */ |
| 255 | static void udc_disable(struct lh7a40x_udc *dev) |
| 256 | { |
Harvey Harrison | 441b62c | 2008-03-03 16:08:34 -0800 | [diff] [blame] | 257 | DEBUG("%s, %p\n", __func__, dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 258 | |
| 259 | udc_set_address(dev, 0); |
| 260 | |
| 261 | /* Disable interrupts */ |
| 262 | usb_write(0, USB_IN_INT_EN); |
| 263 | usb_write(0, USB_OUT_INT_EN); |
| 264 | usb_write(0, USB_INT_EN); |
| 265 | |
| 266 | /* Disable the USB */ |
| 267 | usb_write(0, USB_PM); |
| 268 | |
| 269 | #ifdef CONFIG_ARCH_LH7A404 |
| 270 | /* Disable USB power */ |
| 271 | set_portc_dr(1, 0); |
| 272 | #endif |
| 273 | |
| 274 | /* if hardware supports it, disconnect from usb */ |
| 275 | /* make_usb_disappear(); */ |
| 276 | |
| 277 | dev->ep0state = WAIT_FOR_SETUP; |
| 278 | dev->gadget.speed = USB_SPEED_UNKNOWN; |
| 279 | dev->usb_address = 0; |
| 280 | } |
| 281 | |
| 282 | /* |
| 283 | * udc_reinit - initialize software state |
| 284 | */ |
| 285 | static void udc_reinit(struct lh7a40x_udc *dev) |
| 286 | { |
| 287 | u32 i; |
| 288 | |
Harvey Harrison | 441b62c | 2008-03-03 16:08:34 -0800 | [diff] [blame] | 289 | DEBUG("%s, %p\n", __func__, dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 290 | |
| 291 | /* device/ep0 records init */ |
| 292 | INIT_LIST_HEAD(&dev->gadget.ep_list); |
| 293 | INIT_LIST_HEAD(&dev->gadget.ep0->ep_list); |
| 294 | dev->ep0state = WAIT_FOR_SETUP; |
| 295 | |
| 296 | /* basic endpoint records init */ |
| 297 | for (i = 0; i < UDC_MAX_ENDPOINTS; i++) { |
| 298 | struct lh7a40x_ep *ep = &dev->ep[i]; |
| 299 | |
| 300 | if (i != 0) |
| 301 | list_add_tail(&ep->ep.ep_list, &dev->gadget.ep_list); |
| 302 | |
| 303 | ep->desc = 0; |
| 304 | ep->stopped = 0; |
| 305 | INIT_LIST_HEAD(&ep->queue); |
| 306 | ep->pio_irqs = 0; |
| 307 | } |
| 308 | |
| 309 | /* the rest was statically initialized, and is read-only */ |
| 310 | } |
| 311 | |
| 312 | #define BYTES2MAXP(x) (x / 8) |
| 313 | #define MAXP2BYTES(x) (x * 8) |
| 314 | |
| 315 | /* until it's enabled, this UDC should be completely invisible |
| 316 | * to any USB host. |
| 317 | */ |
| 318 | static void udc_enable(struct lh7a40x_udc *dev) |
| 319 | { |
| 320 | int ep; |
| 321 | |
Harvey Harrison | 441b62c | 2008-03-03 16:08:34 -0800 | [diff] [blame] | 322 | DEBUG("%s, %p\n", __func__, dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 323 | |
| 324 | dev->gadget.speed = USB_SPEED_UNKNOWN; |
| 325 | |
| 326 | #ifdef CONFIG_ARCH_LH7A404 |
| 327 | /* Set Port C bit 1 & 2 as output */ |
| 328 | set_portc_ddr(1, 1); |
| 329 | set_portc_ddr(2, 1); |
| 330 | |
| 331 | /* Enable USB power */ |
| 332 | set_portc_dr(1, 0); |
| 333 | #endif |
| 334 | |
| 335 | /* |
| 336 | * C.f Chapter 18.1.3.1 Initializing the USB |
| 337 | */ |
| 338 | |
| 339 | /* Disable the USB */ |
| 340 | usb_clear(PM_USB_ENABLE, USB_PM); |
| 341 | |
| 342 | /* Reset APB & I/O sides of the USB */ |
| 343 | usb_set(USB_RESET_APB | USB_RESET_IO, USB_RESET); |
| 344 | mdelay(5); |
| 345 | usb_clear(USB_RESET_APB | USB_RESET_IO, USB_RESET); |
| 346 | |
| 347 | /* Set MAXP values for each */ |
| 348 | for (ep = 0; ep < UDC_MAX_ENDPOINTS; ep++) { |
| 349 | struct lh7a40x_ep *ep_reg = &dev->ep[ep]; |
| 350 | u32 csr; |
| 351 | |
| 352 | usb_set_index(ep); |
| 353 | |
| 354 | switch (ep_reg->ep_type) { |
| 355 | case ep_bulk_in: |
| 356 | case ep_interrupt: |
| 357 | usb_clear(USB_IN_CSR2_USB_DMA_EN | USB_IN_CSR2_AUTO_SET, |
| 358 | ep_reg->csr2); |
| 359 | /* Fall through */ |
| 360 | case ep_control: |
| 361 | usb_write(BYTES2MAXP(ep_maxpacket(ep_reg)), |
| 362 | USB_IN_MAXP); |
| 363 | break; |
| 364 | case ep_bulk_out: |
| 365 | usb_clear(USB_OUT_CSR2_USB_DMA_EN | |
| 366 | USB_OUT_CSR2_AUTO_CLR, ep_reg->csr2); |
| 367 | usb_write(BYTES2MAXP(ep_maxpacket(ep_reg)), |
| 368 | USB_OUT_MAXP); |
| 369 | break; |
| 370 | } |
| 371 | |
| 372 | /* Read & Write CSR1, just in case */ |
| 373 | csr = usb_read(ep_reg->csr1); |
| 374 | usb_write(csr, ep_reg->csr1); |
| 375 | |
| 376 | flush(ep_reg); |
| 377 | } |
| 378 | |
| 379 | /* Disable interrupts */ |
| 380 | usb_write(0, USB_IN_INT_EN); |
| 381 | usb_write(0, USB_OUT_INT_EN); |
| 382 | usb_write(0, USB_INT_EN); |
| 383 | |
| 384 | /* Enable interrupts */ |
| 385 | usb_set(USB_IN_INT_EP0, USB_IN_INT_EN); |
| 386 | usb_set(USB_INT_RESET_INT | USB_INT_RESUME_INT, USB_INT_EN); |
| 387 | /* Dont enable rest of the interrupts */ |
| 388 | /* usb_set(USB_IN_INT_EP3 | USB_IN_INT_EP1 | USB_IN_INT_EP0, USB_IN_INT_EN); |
| 389 | usb_set(USB_OUT_INT_EP2, USB_OUT_INT_EN); */ |
| 390 | |
| 391 | /* Enable SUSPEND */ |
| 392 | usb_set(PM_ENABLE_SUSPEND, USB_PM); |
| 393 | |
| 394 | /* Enable the USB */ |
| 395 | usb_set(PM_USB_ENABLE, USB_PM); |
| 396 | |
| 397 | #ifdef CONFIG_ARCH_LH7A404 |
| 398 | /* NOTE: DOES NOT WORK! */ |
| 399 | /* Let host detect UDC: |
| 400 | * Software must write a 0 to the PMR:DCP_CTRL bit to turn this |
| 401 | * transistor on and pull the USBDP pin HIGH. |
| 402 | */ |
| 403 | /* usb_clear(PM_USB_DCP, USB_PM); |
| 404 | usb_set(PM_USB_DCP, USB_PM); */ |
| 405 | #endif |
| 406 | } |
| 407 | |
| 408 | /* |
| 409 | Register entry point for the peripheral controller driver. |
| 410 | */ |
| 411 | int usb_gadget_register_driver(struct usb_gadget_driver *driver) |
| 412 | { |
| 413 | struct lh7a40x_udc *dev = the_controller; |
| 414 | int retval; |
| 415 | |
Harvey Harrison | 441b62c | 2008-03-03 16:08:34 -0800 | [diff] [blame] | 416 | DEBUG("%s: %s\n", __func__, driver->driver.name); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 417 | |
| 418 | if (!driver |
David Brownell | 6bea476 | 2006-12-05 03:15:33 -0800 | [diff] [blame] | 419 | || driver->speed != USB_SPEED_FULL |
| 420 | || !driver->bind |
| 421 | || !driver->disconnect |
| 422 | || !driver->setup) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 423 | return -EINVAL; |
| 424 | if (!dev) |
| 425 | return -ENODEV; |
| 426 | if (dev->driver) |
| 427 | return -EBUSY; |
| 428 | |
| 429 | /* first hook up the driver ... */ |
| 430 | dev->driver = driver; |
| 431 | dev->gadget.dev.driver = &driver->driver; |
| 432 | |
| 433 | device_add(&dev->gadget.dev); |
| 434 | retval = driver->bind(&dev->gadget); |
| 435 | if (retval) { |
Frank Seidel | 6f8aa65 | 2009-02-05 16:16:24 +0100 | [diff] [blame] | 436 | printk(KERN_WARNING "%s: bind to driver %s --> error %d\n", |
| 437 | dev->gadget.name, driver->driver.name, retval); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 438 | device_del(&dev->gadget.dev); |
| 439 | |
| 440 | dev->driver = 0; |
| 441 | dev->gadget.dev.driver = 0; |
| 442 | return retval; |
| 443 | } |
| 444 | |
| 445 | /* ... then enable host detection and ep0; and we're ready |
| 446 | * for set_configuration as well as eventual disconnect. |
| 447 | * NOTE: this shouldn't power up until later. |
| 448 | */ |
Frank Seidel | 6f8aa65 | 2009-02-05 16:16:24 +0100 | [diff] [blame] | 449 | printk(KERN_WARNING "%s: registered gadget driver '%s'\n", |
| 450 | dev->gadget.name, driver->driver.name); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 451 | |
| 452 | udc_enable(dev); |
| 453 | |
| 454 | return 0; |
| 455 | } |
| 456 | |
| 457 | EXPORT_SYMBOL(usb_gadget_register_driver); |
| 458 | |
| 459 | /* |
| 460 | Unregister entry point for the peripheral controller driver. |
| 461 | */ |
| 462 | int usb_gadget_unregister_driver(struct usb_gadget_driver *driver) |
| 463 | { |
| 464 | struct lh7a40x_udc *dev = the_controller; |
| 465 | unsigned long flags; |
| 466 | |
| 467 | if (!dev) |
| 468 | return -ENODEV; |
David Brownell | 6bea476 | 2006-12-05 03:15:33 -0800 | [diff] [blame] | 469 | if (!driver || driver != dev->driver || !driver->unbind) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 470 | return -EINVAL; |
| 471 | |
| 472 | spin_lock_irqsave(&dev->lock, flags); |
| 473 | dev->driver = 0; |
| 474 | stop_activity(dev, driver); |
| 475 | spin_unlock_irqrestore(&dev->lock, flags); |
| 476 | |
| 477 | driver->unbind(&dev->gadget); |
Patrik Sevallius | eb0be47 | 2007-11-20 09:32:00 -0800 | [diff] [blame] | 478 | dev->gadget.dev.driver = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 479 | device_del(&dev->gadget.dev); |
| 480 | |
| 481 | udc_disable(dev); |
| 482 | |
| 483 | DEBUG("unregistered gadget driver '%s'\n", driver->driver.name); |
| 484 | return 0; |
| 485 | } |
| 486 | |
| 487 | EXPORT_SYMBOL(usb_gadget_unregister_driver); |
| 488 | |
| 489 | /*-------------------------------------------------------------------------*/ |
| 490 | |
| 491 | /** Write request to FIFO (max write == maxp size) |
| 492 | * Return: 0 = still running, 1 = completed, negative = errno |
| 493 | * NOTE: INDEX register must be set for EP |
| 494 | */ |
| 495 | static int write_fifo(struct lh7a40x_ep *ep, struct lh7a40x_request *req) |
| 496 | { |
| 497 | u32 max; |
| 498 | u32 csr; |
| 499 | |
| 500 | max = le16_to_cpu(ep->desc->wMaxPacketSize); |
| 501 | |
| 502 | csr = usb_read(ep->csr1); |
| 503 | DEBUG("CSR: %x %d\n", csr, csr & USB_IN_CSR1_FIFO_NOT_EMPTY); |
| 504 | |
| 505 | if (!(csr & USB_IN_CSR1_FIFO_NOT_EMPTY)) { |
| 506 | unsigned count; |
| 507 | int is_last, is_short; |
| 508 | |
| 509 | count = write_packet(ep, req, max); |
| 510 | usb_set(USB_IN_CSR1_IN_PKT_RDY, ep->csr1); |
| 511 | |
| 512 | /* last packet is usually short (or a zlp) */ |
| 513 | if (unlikely(count != max)) |
| 514 | is_last = is_short = 1; |
| 515 | else { |
| 516 | if (likely(req->req.length != req->req.actual) |
| 517 | || req->req.zero) |
| 518 | is_last = 0; |
| 519 | else |
| 520 | is_last = 1; |
| 521 | /* interrupt/iso maxpacket may not fill the fifo */ |
| 522 | is_short = unlikely(max < ep_maxpacket(ep)); |
| 523 | } |
| 524 | |
Harvey Harrison | 441b62c | 2008-03-03 16:08:34 -0800 | [diff] [blame] | 525 | 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] | 526 | ep->ep.name, count, |
| 527 | is_last ? "/L" : "", is_short ? "/S" : "", |
| 528 | req->req.length - req->req.actual, req); |
| 529 | |
| 530 | /* requests complete when all IN data is in the FIFO */ |
| 531 | if (is_last) { |
| 532 | done(ep, req, 0); |
| 533 | if (list_empty(&ep->queue)) { |
| 534 | pio_irq_disable(ep_index(ep)); |
| 535 | } |
| 536 | return 1; |
| 537 | } |
| 538 | } else { |
| 539 | DEBUG("Hmm.. %d ep FIFO is not empty!\n", ep_index(ep)); |
| 540 | } |
| 541 | |
| 542 | return 0; |
| 543 | } |
| 544 | |
| 545 | /** Read to request from FIFO (max read == bytes in fifo) |
| 546 | * Return: 0 = still running, 1 = completed, negative = errno |
| 547 | * NOTE: INDEX register must be set for EP |
| 548 | */ |
| 549 | static int read_fifo(struct lh7a40x_ep *ep, struct lh7a40x_request *req) |
| 550 | { |
| 551 | u32 csr; |
| 552 | u8 *buf; |
| 553 | unsigned bufferspace, count, is_short; |
| 554 | volatile u32 *fifo = (volatile u32 *)ep->fifo; |
| 555 | |
| 556 | /* make sure there's a packet in the FIFO. */ |
| 557 | csr = usb_read(ep->csr1); |
| 558 | if (!(csr & USB_OUT_CSR1_OUT_PKT_RDY)) { |
Harvey Harrison | 441b62c | 2008-03-03 16:08:34 -0800 | [diff] [blame] | 559 | DEBUG("%s: Packet NOT ready!\n", __func__); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 560 | return -EINVAL; |
| 561 | } |
| 562 | |
| 563 | buf = req->req.buf + req->req.actual; |
| 564 | prefetchw(buf); |
| 565 | bufferspace = req->req.length - req->req.actual; |
| 566 | |
| 567 | /* read all bytes from this packet */ |
| 568 | count = usb_read(USB_OUT_FIFO_WC1); |
| 569 | req->req.actual += min(count, bufferspace); |
| 570 | |
| 571 | is_short = (count < ep->ep.maxpacket); |
| 572 | DEBUG("read %s %02x, %d bytes%s req %p %d/%d\n", |
| 573 | ep->ep.name, csr, count, |
| 574 | is_short ? "/S" : "", req, req->req.actual, req->req.length); |
| 575 | |
| 576 | while (likely(count-- != 0)) { |
| 577 | u8 byte = (u8) (*fifo & 0xff); |
| 578 | |
| 579 | if (unlikely(bufferspace == 0)) { |
| 580 | /* this happens when the driver's buffer |
| 581 | * is smaller than what the host sent. |
| 582 | * discard the extra data. |
| 583 | */ |
| 584 | if (req->req.status != -EOVERFLOW) |
Frank Seidel | 6f8aa65 | 2009-02-05 16:16:24 +0100 | [diff] [blame] | 585 | printk(KERN_WARNING "%s overflow %d\n", |
| 586 | ep->ep.name, count); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 587 | req->req.status = -EOVERFLOW; |
| 588 | } else { |
| 589 | *buf++ = byte; |
| 590 | bufferspace--; |
| 591 | } |
| 592 | } |
| 593 | |
| 594 | usb_clear(USB_OUT_CSR1_OUT_PKT_RDY, ep->csr1); |
| 595 | |
| 596 | /* completion */ |
| 597 | if (is_short || req->req.actual == req->req.length) { |
| 598 | done(ep, req, 0); |
| 599 | usb_set(USB_OUT_CSR1_FIFO_FLUSH, ep->csr1); |
| 600 | |
| 601 | if (list_empty(&ep->queue)) |
| 602 | pio_irq_disable(ep_index(ep)); |
| 603 | return 1; |
| 604 | } |
| 605 | |
| 606 | /* finished that packet. the next one may be waiting... */ |
| 607 | return 0; |
| 608 | } |
| 609 | |
| 610 | /* |
| 611 | * done - retire a request; caller blocked irqs |
| 612 | * INDEX register is preserved to keep same |
| 613 | */ |
| 614 | static void done(struct lh7a40x_ep *ep, struct lh7a40x_request *req, int status) |
| 615 | { |
| 616 | unsigned int stopped = ep->stopped; |
| 617 | u32 index; |
| 618 | |
Harvey Harrison | 441b62c | 2008-03-03 16:08:34 -0800 | [diff] [blame] | 619 | DEBUG("%s, %p\n", __func__, ep); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 620 | list_del_init(&req->queue); |
| 621 | |
| 622 | if (likely(req->req.status == -EINPROGRESS)) |
| 623 | req->req.status = status; |
| 624 | else |
| 625 | status = req->req.status; |
| 626 | |
| 627 | if (status && status != -ESHUTDOWN) |
| 628 | DEBUG("complete %s req %p stat %d len %u/%u\n", |
| 629 | ep->ep.name, &req->req, status, |
| 630 | req->req.actual, req->req.length); |
| 631 | |
| 632 | /* don't modify queue heads during completion callback */ |
| 633 | ep->stopped = 1; |
| 634 | /* Read current index (completion may modify it) */ |
| 635 | index = usb_read(USB_INDEX); |
| 636 | |
| 637 | spin_unlock(&ep->dev->lock); |
| 638 | req->req.complete(&ep->ep, &req->req); |
| 639 | spin_lock(&ep->dev->lock); |
| 640 | |
| 641 | /* Restore index */ |
| 642 | usb_set_index(index); |
| 643 | ep->stopped = stopped; |
| 644 | } |
| 645 | |
| 646 | /** Enable EP interrupt */ |
| 647 | static void pio_irq_enable(int ep) |
| 648 | { |
Harvey Harrison | 441b62c | 2008-03-03 16:08:34 -0800 | [diff] [blame] | 649 | DEBUG("%s: %d\n", __func__, ep); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 650 | |
| 651 | switch (ep) { |
| 652 | case 1: |
| 653 | usb_set(USB_IN_INT_EP1, USB_IN_INT_EN); |
| 654 | break; |
| 655 | case 2: |
| 656 | usb_set(USB_OUT_INT_EP2, USB_OUT_INT_EN); |
| 657 | break; |
| 658 | case 3: |
| 659 | usb_set(USB_IN_INT_EP3, USB_IN_INT_EN); |
| 660 | break; |
| 661 | default: |
| 662 | DEBUG("Unknown endpoint: %d\n", ep); |
| 663 | break; |
| 664 | } |
| 665 | } |
| 666 | |
| 667 | /** Disable EP interrupt */ |
| 668 | static void pio_irq_disable(int ep) |
| 669 | { |
Harvey Harrison | 441b62c | 2008-03-03 16:08:34 -0800 | [diff] [blame] | 670 | DEBUG("%s: %d\n", __func__, ep); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 671 | |
| 672 | switch (ep) { |
| 673 | case 1: |
| 674 | usb_clear(USB_IN_INT_EP1, USB_IN_INT_EN); |
| 675 | break; |
| 676 | case 2: |
| 677 | usb_clear(USB_OUT_INT_EP2, USB_OUT_INT_EN); |
| 678 | break; |
| 679 | case 3: |
| 680 | usb_clear(USB_IN_INT_EP3, USB_IN_INT_EN); |
| 681 | break; |
| 682 | default: |
| 683 | DEBUG("Unknown endpoint: %d\n", ep); |
| 684 | break; |
| 685 | } |
| 686 | } |
| 687 | |
| 688 | /* |
| 689 | * nuke - dequeue ALL requests |
| 690 | */ |
| 691 | void nuke(struct lh7a40x_ep *ep, int status) |
| 692 | { |
| 693 | struct lh7a40x_request *req; |
| 694 | |
Harvey Harrison | 441b62c | 2008-03-03 16:08:34 -0800 | [diff] [blame] | 695 | DEBUG("%s, %p\n", __func__, ep); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 696 | |
| 697 | /* Flush FIFO */ |
| 698 | flush(ep); |
| 699 | |
| 700 | /* called with irqs blocked */ |
| 701 | while (!list_empty(&ep->queue)) { |
| 702 | req = list_entry(ep->queue.next, struct lh7a40x_request, queue); |
| 703 | done(ep, req, status); |
| 704 | } |
| 705 | |
Steven Cole | 093cf72 | 2005-05-03 19:07:24 -0600 | [diff] [blame] | 706 | /* Disable IRQ if EP is enabled (has descriptor) */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 707 | if (ep->desc) |
| 708 | pio_irq_disable(ep_index(ep)); |
| 709 | } |
| 710 | |
| 711 | /* |
| 712 | void nuke_all(struct lh7a40x_udc *dev) |
| 713 | { |
| 714 | int n; |
| 715 | for(n=0; n<UDC_MAX_ENDPOINTS; n++) { |
| 716 | struct lh7a40x_ep *ep = &dev->ep[n]; |
| 717 | usb_set_index(n); |
| 718 | nuke(ep, 0); |
| 719 | } |
| 720 | }*/ |
| 721 | |
| 722 | /* |
| 723 | static void flush_all(struct lh7a40x_udc *dev) |
| 724 | { |
| 725 | int n; |
| 726 | for (n = 0; n < UDC_MAX_ENDPOINTS; n++) |
| 727 | { |
| 728 | struct lh7a40x_ep *ep = &dev->ep[n]; |
| 729 | flush(ep); |
| 730 | } |
| 731 | } |
| 732 | */ |
| 733 | |
| 734 | /** Flush EP |
| 735 | * NOTE: INDEX register must be set before this call |
| 736 | */ |
| 737 | static void flush(struct lh7a40x_ep *ep) |
| 738 | { |
Harvey Harrison | 441b62c | 2008-03-03 16:08:34 -0800 | [diff] [blame] | 739 | DEBUG("%s, %p\n", __func__, ep); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 740 | |
| 741 | switch (ep->ep_type) { |
| 742 | case ep_control: |
| 743 | /* check, by implication c.f. 15.1.2.11 */ |
| 744 | break; |
| 745 | |
| 746 | case ep_bulk_in: |
| 747 | case ep_interrupt: |
| 748 | /* if(csr & USB_IN_CSR1_IN_PKT_RDY) */ |
| 749 | usb_set(USB_IN_CSR1_FIFO_FLUSH, ep->csr1); |
| 750 | break; |
| 751 | |
| 752 | case ep_bulk_out: |
| 753 | /* if(csr & USB_OUT_CSR1_OUT_PKT_RDY) */ |
| 754 | usb_set(USB_OUT_CSR1_FIFO_FLUSH, ep->csr1); |
| 755 | break; |
| 756 | } |
| 757 | } |
| 758 | |
| 759 | /** |
| 760 | * lh7a40x_in_epn - handle IN interrupt |
| 761 | */ |
| 762 | static void lh7a40x_in_epn(struct lh7a40x_udc *dev, u32 ep_idx, u32 intr) |
| 763 | { |
| 764 | u32 csr; |
| 765 | struct lh7a40x_ep *ep = &dev->ep[ep_idx]; |
| 766 | struct lh7a40x_request *req; |
| 767 | |
| 768 | usb_set_index(ep_idx); |
| 769 | |
| 770 | csr = usb_read(ep->csr1); |
Harvey Harrison | 441b62c | 2008-03-03 16:08:34 -0800 | [diff] [blame] | 771 | DEBUG("%s: %d, csr %x\n", __func__, ep_idx, csr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 772 | |
| 773 | if (csr & USB_IN_CSR1_SENT_STALL) { |
| 774 | DEBUG("USB_IN_CSR1_SENT_STALL\n"); |
| 775 | usb_set(USB_IN_CSR1_SENT_STALL /*|USB_IN_CSR1_SEND_STALL */ , |
| 776 | ep->csr1); |
| 777 | return; |
| 778 | } |
| 779 | |
| 780 | if (!ep->desc) { |
Harvey Harrison | 441b62c | 2008-03-03 16:08:34 -0800 | [diff] [blame] | 781 | DEBUG("%s: NO EP DESC\n", __func__); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 782 | return; |
| 783 | } |
| 784 | |
| 785 | if (list_empty(&ep->queue)) |
| 786 | req = 0; |
| 787 | else |
| 788 | req = list_entry(ep->queue.next, struct lh7a40x_request, queue); |
| 789 | |
| 790 | DEBUG("req: %p\n", req); |
| 791 | |
| 792 | if (!req) |
| 793 | return; |
| 794 | |
| 795 | write_fifo(ep, req); |
| 796 | } |
| 797 | |
| 798 | /* ********************************************************************************************* */ |
| 799 | /* Bulk OUT (recv) |
| 800 | */ |
| 801 | |
| 802 | static void lh7a40x_out_epn(struct lh7a40x_udc *dev, u32 ep_idx, u32 intr) |
| 803 | { |
| 804 | struct lh7a40x_ep *ep = &dev->ep[ep_idx]; |
| 805 | struct lh7a40x_request *req; |
| 806 | |
Harvey Harrison | 441b62c | 2008-03-03 16:08:34 -0800 | [diff] [blame] | 807 | DEBUG("%s: %d\n", __func__, ep_idx); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 808 | |
| 809 | usb_set_index(ep_idx); |
| 810 | |
| 811 | if (ep->desc) { |
| 812 | u32 csr; |
| 813 | csr = usb_read(ep->csr1); |
| 814 | |
| 815 | while ((csr = |
| 816 | usb_read(ep-> |
| 817 | csr1)) & (USB_OUT_CSR1_OUT_PKT_RDY | |
| 818 | USB_OUT_CSR1_SENT_STALL)) { |
Harvey Harrison | 441b62c | 2008-03-03 16:08:34 -0800 | [diff] [blame] | 819 | DEBUG("%s: %x\n", __func__, csr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 820 | |
| 821 | if (csr & USB_OUT_CSR1_SENT_STALL) { |
| 822 | DEBUG("%s: stall sent, flush fifo\n", |
Harvey Harrison | 441b62c | 2008-03-03 16:08:34 -0800 | [diff] [blame] | 823 | __func__); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 824 | /* usb_set(USB_OUT_CSR1_FIFO_FLUSH, ep->csr1); */ |
| 825 | flush(ep); |
| 826 | } else if (csr & USB_OUT_CSR1_OUT_PKT_RDY) { |
| 827 | if (list_empty(&ep->queue)) |
| 828 | req = 0; |
| 829 | else |
| 830 | req = |
| 831 | list_entry(ep->queue.next, |
| 832 | struct lh7a40x_request, |
| 833 | queue); |
| 834 | |
| 835 | if (!req) { |
Frank Seidel | 6f8aa65 | 2009-02-05 16:16:24 +0100 | [diff] [blame] | 836 | printk(KERN_WARNING |
| 837 | "%s: NULL REQ %d\n", |
Harvey Harrison | 441b62c | 2008-03-03 16:08:34 -0800 | [diff] [blame] | 838 | __func__, ep_idx); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 839 | flush(ep); |
| 840 | break; |
| 841 | } else { |
| 842 | read_fifo(ep, req); |
| 843 | } |
| 844 | } |
| 845 | |
| 846 | } |
| 847 | |
| 848 | } else { |
| 849 | /* Throw packet away.. */ |
Frank Seidel | 6f8aa65 | 2009-02-05 16:16:24 +0100 | [diff] [blame] | 850 | printk(KERN_WARNING "%s: No descriptor?!?\n", __func__); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 851 | flush(ep); |
| 852 | } |
| 853 | } |
| 854 | |
| 855 | static void stop_activity(struct lh7a40x_udc *dev, |
| 856 | struct usb_gadget_driver *driver) |
| 857 | { |
| 858 | int i; |
| 859 | |
| 860 | /* don't disconnect drivers more than once */ |
| 861 | if (dev->gadget.speed == USB_SPEED_UNKNOWN) |
| 862 | driver = 0; |
| 863 | dev->gadget.speed = USB_SPEED_UNKNOWN; |
| 864 | |
| 865 | /* prevent new request submissions, kill any outstanding requests */ |
| 866 | for (i = 0; i < UDC_MAX_ENDPOINTS; i++) { |
| 867 | struct lh7a40x_ep *ep = &dev->ep[i]; |
| 868 | ep->stopped = 1; |
| 869 | |
| 870 | usb_set_index(i); |
| 871 | nuke(ep, -ESHUTDOWN); |
| 872 | } |
| 873 | |
| 874 | /* report disconnect; the driver is already quiesced */ |
| 875 | if (driver) { |
| 876 | spin_unlock(&dev->lock); |
| 877 | driver->disconnect(&dev->gadget); |
| 878 | spin_lock(&dev->lock); |
| 879 | } |
| 880 | |
| 881 | /* re-init driver-visible data structures */ |
| 882 | udc_reinit(dev); |
| 883 | } |
| 884 | |
| 885 | /** Handle USB RESET interrupt |
| 886 | */ |
| 887 | static void lh7a40x_reset_intr(struct lh7a40x_udc *dev) |
| 888 | { |
| 889 | #if 0 /* def CONFIG_ARCH_LH7A404 */ |
| 890 | /* Does not work always... */ |
| 891 | |
Harvey Harrison | 441b62c | 2008-03-03 16:08:34 -0800 | [diff] [blame] | 892 | DEBUG("%s: %d\n", __func__, dev->usb_address); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 893 | |
| 894 | if (!dev->usb_address) { |
| 895 | /*usb_set(USB_RESET_IO, USB_RESET); |
| 896 | mdelay(5); |
| 897 | usb_clear(USB_RESET_IO, USB_RESET); */ |
| 898 | return; |
| 899 | } |
| 900 | /* Put the USB controller into reset. */ |
| 901 | usb_set(USB_RESET_IO, USB_RESET); |
| 902 | |
| 903 | /* Set Device ID to 0 */ |
| 904 | udc_set_address(dev, 0); |
| 905 | |
| 906 | /* Let PLL2 settle down */ |
| 907 | mdelay(5); |
| 908 | |
| 909 | /* Release the USB controller from reset */ |
| 910 | usb_clear(USB_RESET_IO, USB_RESET); |
| 911 | |
| 912 | /* Re-enable UDC */ |
| 913 | udc_enable(dev); |
| 914 | |
| 915 | #endif |
| 916 | dev->gadget.speed = USB_SPEED_FULL; |
| 917 | } |
| 918 | |
| 919 | /* |
| 920 | * lh7a40x usb client interrupt handler. |
| 921 | */ |
David Howells | 7d12e78 | 2006-10-05 14:55:46 +0100 | [diff] [blame] | 922 | static irqreturn_t lh7a40x_udc_irq(int irq, void *_dev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 923 | { |
| 924 | struct lh7a40x_udc *dev = _dev; |
| 925 | |
| 926 | DEBUG("\n\n"); |
| 927 | |
| 928 | spin_lock(&dev->lock); |
| 929 | |
| 930 | for (;;) { |
| 931 | u32 intr_in = usb_read(USB_IN_INT); |
| 932 | u32 intr_out = usb_read(USB_OUT_INT); |
| 933 | u32 intr_int = usb_read(USB_INT); |
| 934 | |
| 935 | /* Test also against enable bits.. (lh7a40x errata).. Sigh.. */ |
| 936 | u32 in_en = usb_read(USB_IN_INT_EN); |
| 937 | u32 out_en = usb_read(USB_OUT_INT_EN); |
| 938 | |
| 939 | if (!intr_out && !intr_in && !intr_int) |
| 940 | break; |
| 941 | |
Harvey Harrison | 441b62c | 2008-03-03 16:08:34 -0800 | [diff] [blame] | 942 | DEBUG("%s (on state %s)\n", __func__, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 943 | state_names[dev->ep0state]); |
| 944 | DEBUG("intr_out = %x\n", intr_out); |
| 945 | DEBUG("intr_in = %x\n", intr_in); |
| 946 | DEBUG("intr_int = %x\n", intr_int); |
| 947 | |
| 948 | if (intr_in) { |
| 949 | usb_write(intr_in, USB_IN_INT); |
| 950 | |
| 951 | if ((intr_in & USB_IN_INT_EP1) |
| 952 | && (in_en & USB_IN_INT_EP1)) { |
| 953 | DEBUG("USB_IN_INT_EP1\n"); |
| 954 | lh7a40x_in_epn(dev, 1, intr_in); |
| 955 | } |
| 956 | if ((intr_in & USB_IN_INT_EP3) |
| 957 | && (in_en & USB_IN_INT_EP3)) { |
| 958 | DEBUG("USB_IN_INT_EP3\n"); |
| 959 | lh7a40x_in_epn(dev, 3, intr_in); |
| 960 | } |
| 961 | if (intr_in & USB_IN_INT_EP0) { |
| 962 | DEBUG("USB_IN_INT_EP0 (control)\n"); |
| 963 | lh7a40x_handle_ep0(dev, intr_in); |
| 964 | } |
| 965 | } |
| 966 | |
| 967 | if (intr_out) { |
| 968 | usb_write(intr_out, USB_OUT_INT); |
| 969 | |
| 970 | if ((intr_out & USB_OUT_INT_EP2) |
| 971 | && (out_en & USB_OUT_INT_EP2)) { |
| 972 | DEBUG("USB_OUT_INT_EP2\n"); |
| 973 | lh7a40x_out_epn(dev, 2, intr_out); |
| 974 | } |
| 975 | } |
| 976 | |
| 977 | if (intr_int) { |
| 978 | usb_write(intr_int, USB_INT); |
| 979 | |
| 980 | if (intr_int & USB_INT_RESET_INT) { |
| 981 | lh7a40x_reset_intr(dev); |
| 982 | } |
| 983 | |
| 984 | if (intr_int & USB_INT_RESUME_INT) { |
| 985 | DEBUG("USB resume\n"); |
| 986 | |
| 987 | if (dev->gadget.speed != USB_SPEED_UNKNOWN |
| 988 | && dev->driver |
| 989 | && dev->driver->resume |
| 990 | && is_usb_connected()) { |
| 991 | dev->driver->resume(&dev->gadget); |
| 992 | } |
| 993 | } |
| 994 | |
| 995 | if (intr_int & USB_INT_SUSPEND_INT) { |
| 996 | DEBUG("USB suspend%s\n", |
| 997 | is_usb_connected()? "" : "+disconnect"); |
| 998 | if (!is_usb_connected()) { |
| 999 | stop_activity(dev, dev->driver); |
| 1000 | } else if (dev->gadget.speed != |
| 1001 | USB_SPEED_UNKNOWN && dev->driver |
| 1002 | && dev->driver->suspend) { |
| 1003 | dev->driver->suspend(&dev->gadget); |
| 1004 | } |
| 1005 | } |
| 1006 | |
| 1007 | } |
| 1008 | } |
| 1009 | |
| 1010 | spin_unlock(&dev->lock); |
| 1011 | |
| 1012 | return IRQ_HANDLED; |
| 1013 | } |
| 1014 | |
| 1015 | static int lh7a40x_ep_enable(struct usb_ep *_ep, |
| 1016 | const struct usb_endpoint_descriptor *desc) |
| 1017 | { |
| 1018 | struct lh7a40x_ep *ep; |
| 1019 | struct lh7a40x_udc *dev; |
| 1020 | unsigned long flags; |
| 1021 | |
Harvey Harrison | 441b62c | 2008-03-03 16:08:34 -0800 | [diff] [blame] | 1022 | DEBUG("%s, %p\n", __func__, _ep); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1023 | |
| 1024 | ep = container_of(_ep, struct lh7a40x_ep, ep); |
| 1025 | if (!_ep || !desc || ep->desc || _ep->name == ep0name |
| 1026 | || desc->bDescriptorType != USB_DT_ENDPOINT |
| 1027 | || ep->bEndpointAddress != desc->bEndpointAddress |
| 1028 | || ep_maxpacket(ep) < le16_to_cpu(desc->wMaxPacketSize)) { |
Harvey Harrison | 441b62c | 2008-03-03 16:08:34 -0800 | [diff] [blame] | 1029 | DEBUG("%s, bad ep or descriptor\n", __func__); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1030 | return -EINVAL; |
| 1031 | } |
| 1032 | |
| 1033 | /* xfer types must match, except that interrupt ~= bulk */ |
| 1034 | if (ep->bmAttributes != desc->bmAttributes |
| 1035 | && ep->bmAttributes != USB_ENDPOINT_XFER_BULK |
| 1036 | && desc->bmAttributes != USB_ENDPOINT_XFER_INT) { |
Harvey Harrison | 441b62c | 2008-03-03 16:08:34 -0800 | [diff] [blame] | 1037 | DEBUG("%s, %s type mismatch\n", __func__, _ep->name); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1038 | return -EINVAL; |
| 1039 | } |
| 1040 | |
| 1041 | /* hardware _could_ do smaller, but driver doesn't */ |
| 1042 | if ((desc->bmAttributes == USB_ENDPOINT_XFER_BULK |
| 1043 | && le16_to_cpu(desc->wMaxPacketSize) != ep_maxpacket(ep)) |
| 1044 | || !desc->wMaxPacketSize) { |
Harvey Harrison | 441b62c | 2008-03-03 16:08:34 -0800 | [diff] [blame] | 1045 | DEBUG("%s, bad %s maxpacket\n", __func__, _ep->name); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1046 | return -ERANGE; |
| 1047 | } |
| 1048 | |
| 1049 | dev = ep->dev; |
| 1050 | if (!dev->driver || dev->gadget.speed == USB_SPEED_UNKNOWN) { |
Harvey Harrison | 441b62c | 2008-03-03 16:08:34 -0800 | [diff] [blame] | 1051 | DEBUG("%s, bogus device state\n", __func__); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1052 | return -ESHUTDOWN; |
| 1053 | } |
| 1054 | |
| 1055 | spin_lock_irqsave(&ep->dev->lock, flags); |
| 1056 | |
| 1057 | ep->stopped = 0; |
| 1058 | ep->desc = desc; |
| 1059 | ep->pio_irqs = 0; |
| 1060 | ep->ep.maxpacket = le16_to_cpu(desc->wMaxPacketSize); |
| 1061 | |
Franck Bui-Huu | d5ec334 | 2006-02-23 09:35:06 +0100 | [diff] [blame] | 1062 | spin_unlock_irqrestore(&ep->dev->lock, flags); |
| 1063 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1064 | /* Reset halt state (does flush) */ |
| 1065 | lh7a40x_set_halt(_ep, 0); |
| 1066 | |
Harvey Harrison | 441b62c | 2008-03-03 16:08:34 -0800 | [diff] [blame] | 1067 | DEBUG("%s: enabled %s\n", __func__, _ep->name); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1068 | return 0; |
| 1069 | } |
| 1070 | |
| 1071 | /** Disable EP |
| 1072 | * NOTE: Sets INDEX register |
| 1073 | */ |
| 1074 | static int lh7a40x_ep_disable(struct usb_ep *_ep) |
| 1075 | { |
| 1076 | struct lh7a40x_ep *ep; |
| 1077 | unsigned long flags; |
| 1078 | |
Harvey Harrison | 441b62c | 2008-03-03 16:08:34 -0800 | [diff] [blame] | 1079 | DEBUG("%s, %p\n", __func__, _ep); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1080 | |
| 1081 | ep = container_of(_ep, struct lh7a40x_ep, ep); |
| 1082 | if (!_ep || !ep->desc) { |
Harvey Harrison | 441b62c | 2008-03-03 16:08:34 -0800 | [diff] [blame] | 1083 | DEBUG("%s, %s not enabled\n", __func__, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1084 | _ep ? ep->ep.name : NULL); |
| 1085 | return -EINVAL; |
| 1086 | } |
| 1087 | |
| 1088 | spin_lock_irqsave(&ep->dev->lock, flags); |
| 1089 | |
| 1090 | usb_set_index(ep_index(ep)); |
| 1091 | |
| 1092 | /* Nuke all pending requests (does flush) */ |
| 1093 | nuke(ep, -ESHUTDOWN); |
| 1094 | |
| 1095 | /* Disable ep IRQ */ |
| 1096 | pio_irq_disable(ep_index(ep)); |
| 1097 | |
| 1098 | ep->desc = 0; |
| 1099 | ep->stopped = 1; |
| 1100 | |
| 1101 | spin_unlock_irqrestore(&ep->dev->lock, flags); |
| 1102 | |
Harvey Harrison | 441b62c | 2008-03-03 16:08:34 -0800 | [diff] [blame] | 1103 | DEBUG("%s: disabled %s\n", __func__, _ep->name); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1104 | return 0; |
| 1105 | } |
| 1106 | |
| 1107 | static struct usb_request *lh7a40x_alloc_request(struct usb_ep *ep, |
Al Viro | 55016f1 | 2005-10-21 03:21:58 -0400 | [diff] [blame] | 1108 | gfp_t gfp_flags) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1109 | { |
| 1110 | struct lh7a40x_request *req; |
| 1111 | |
Harvey Harrison | 441b62c | 2008-03-03 16:08:34 -0800 | [diff] [blame] | 1112 | DEBUG("%s, %p\n", __func__, ep); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1113 | |
Eric Sesterhenn | 7039f42 | 2006-02-27 13:34:10 -0800 | [diff] [blame] | 1114 | req = kzalloc(sizeof(*req), gfp_flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1115 | if (!req) |
| 1116 | return 0; |
| 1117 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1118 | INIT_LIST_HEAD(&req->queue); |
| 1119 | |
| 1120 | return &req->req; |
| 1121 | } |
| 1122 | |
| 1123 | static void lh7a40x_free_request(struct usb_ep *ep, struct usb_request *_req) |
| 1124 | { |
| 1125 | struct lh7a40x_request *req; |
| 1126 | |
Harvey Harrison | 441b62c | 2008-03-03 16:08:34 -0800 | [diff] [blame] | 1127 | DEBUG("%s, %p\n", __func__, ep); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1128 | |
| 1129 | req = container_of(_req, struct lh7a40x_request, req); |
| 1130 | WARN_ON(!list_empty(&req->queue)); |
| 1131 | kfree(req); |
| 1132 | } |
| 1133 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1134 | /** Queue one request |
| 1135 | * Kickstart transfer if needed |
| 1136 | * NOTE: Sets INDEX register |
| 1137 | */ |
| 1138 | static int lh7a40x_queue(struct usb_ep *_ep, struct usb_request *_req, |
Al Viro | 55016f1 | 2005-10-21 03:21:58 -0400 | [diff] [blame] | 1139 | gfp_t gfp_flags) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1140 | { |
| 1141 | struct lh7a40x_request *req; |
| 1142 | struct lh7a40x_ep *ep; |
| 1143 | struct lh7a40x_udc *dev; |
| 1144 | unsigned long flags; |
| 1145 | |
Harvey Harrison | 441b62c | 2008-03-03 16:08:34 -0800 | [diff] [blame] | 1146 | DEBUG("\n\n\n%s, %p\n", __func__, _ep); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1147 | |
| 1148 | req = container_of(_req, struct lh7a40x_request, req); |
| 1149 | if (unlikely |
| 1150 | (!_req || !_req->complete || !_req->buf |
| 1151 | || !list_empty(&req->queue))) { |
Harvey Harrison | 441b62c | 2008-03-03 16:08:34 -0800 | [diff] [blame] | 1152 | DEBUG("%s, bad params\n", __func__); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1153 | return -EINVAL; |
| 1154 | } |
| 1155 | |
| 1156 | ep = container_of(_ep, struct lh7a40x_ep, ep); |
| 1157 | if (unlikely(!_ep || (!ep->desc && ep->ep.name != ep0name))) { |
Harvey Harrison | 441b62c | 2008-03-03 16:08:34 -0800 | [diff] [blame] | 1158 | DEBUG("%s, bad ep\n", __func__); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1159 | return -EINVAL; |
| 1160 | } |
| 1161 | |
| 1162 | dev = ep->dev; |
| 1163 | if (unlikely(!dev->driver || dev->gadget.speed == USB_SPEED_UNKNOWN)) { |
Harvey Harrison | 441b62c | 2008-03-03 16:08:34 -0800 | [diff] [blame] | 1164 | DEBUG("%s, bogus device state %p\n", __func__, dev->driver); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1165 | return -ESHUTDOWN; |
| 1166 | } |
| 1167 | |
| 1168 | DEBUG("%s queue req %p, len %d buf %p\n", _ep->name, _req, _req->length, |
| 1169 | _req->buf); |
| 1170 | |
| 1171 | spin_lock_irqsave(&dev->lock, flags); |
| 1172 | |
| 1173 | _req->status = -EINPROGRESS; |
| 1174 | _req->actual = 0; |
| 1175 | |
| 1176 | /* kickstart this i/o queue? */ |
| 1177 | DEBUG("Add to %d Q %d %d\n", ep_index(ep), list_empty(&ep->queue), |
| 1178 | ep->stopped); |
| 1179 | if (list_empty(&ep->queue) && likely(!ep->stopped)) { |
| 1180 | u32 csr; |
| 1181 | |
| 1182 | if (unlikely(ep_index(ep) == 0)) { |
| 1183 | /* EP0 */ |
| 1184 | list_add_tail(&req->queue, &ep->queue); |
| 1185 | lh7a40x_ep0_kick(dev, ep); |
| 1186 | req = 0; |
| 1187 | } else if (ep_is_in(ep)) { |
| 1188 | /* EP1 & EP3 */ |
| 1189 | usb_set_index(ep_index(ep)); |
| 1190 | csr = usb_read(ep->csr1); |
| 1191 | pio_irq_enable(ep_index(ep)); |
| 1192 | if ((csr & USB_IN_CSR1_FIFO_NOT_EMPTY) == 0) { |
| 1193 | if (write_fifo(ep, req) == 1) |
| 1194 | req = 0; |
| 1195 | } |
| 1196 | } else { |
| 1197 | /* EP2 */ |
| 1198 | usb_set_index(ep_index(ep)); |
| 1199 | csr = usb_read(ep->csr1); |
| 1200 | pio_irq_enable(ep_index(ep)); |
| 1201 | if (!(csr & USB_OUT_CSR1_FIFO_FULL)) { |
| 1202 | if (read_fifo(ep, req) == 1) |
| 1203 | req = 0; |
| 1204 | } |
| 1205 | } |
| 1206 | } |
| 1207 | |
| 1208 | /* pio or dma irq handler advances the queue. */ |
| 1209 | if (likely(req != 0)) |
| 1210 | list_add_tail(&req->queue, &ep->queue); |
| 1211 | |
| 1212 | spin_unlock_irqrestore(&dev->lock, flags); |
| 1213 | |
| 1214 | return 0; |
| 1215 | } |
| 1216 | |
| 1217 | /* dequeue JUST ONE request */ |
| 1218 | static int lh7a40x_dequeue(struct usb_ep *_ep, struct usb_request *_req) |
| 1219 | { |
| 1220 | struct lh7a40x_ep *ep; |
| 1221 | struct lh7a40x_request *req; |
| 1222 | unsigned long flags; |
| 1223 | |
Harvey Harrison | 441b62c | 2008-03-03 16:08:34 -0800 | [diff] [blame] | 1224 | DEBUG("%s, %p\n", __func__, _ep); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1225 | |
| 1226 | ep = container_of(_ep, struct lh7a40x_ep, ep); |
| 1227 | if (!_ep || ep->ep.name == ep0name) |
| 1228 | return -EINVAL; |
| 1229 | |
| 1230 | spin_lock_irqsave(&ep->dev->lock, flags); |
| 1231 | |
| 1232 | /* make sure it's actually queued on this endpoint */ |
| 1233 | list_for_each_entry(req, &ep->queue, queue) { |
| 1234 | if (&req->req == _req) |
| 1235 | break; |
| 1236 | } |
| 1237 | if (&req->req != _req) { |
| 1238 | spin_unlock_irqrestore(&ep->dev->lock, flags); |
| 1239 | return -EINVAL; |
| 1240 | } |
| 1241 | |
| 1242 | done(ep, req, -ECONNRESET); |
| 1243 | |
| 1244 | spin_unlock_irqrestore(&ep->dev->lock, flags); |
| 1245 | return 0; |
| 1246 | } |
| 1247 | |
| 1248 | /** Halt specific EP |
| 1249 | * Return 0 if success |
| 1250 | * NOTE: Sets INDEX register to EP ! |
| 1251 | */ |
| 1252 | static int lh7a40x_set_halt(struct usb_ep *_ep, int value) |
| 1253 | { |
| 1254 | struct lh7a40x_ep *ep; |
| 1255 | unsigned long flags; |
| 1256 | |
| 1257 | ep = container_of(_ep, struct lh7a40x_ep, ep); |
| 1258 | if (unlikely(!_ep || (!ep->desc && ep->ep.name != ep0name))) { |
Harvey Harrison | 441b62c | 2008-03-03 16:08:34 -0800 | [diff] [blame] | 1259 | DEBUG("%s, bad ep\n", __func__); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1260 | return -EINVAL; |
| 1261 | } |
| 1262 | |
| 1263 | usb_set_index(ep_index(ep)); |
| 1264 | |
Harvey Harrison | 441b62c | 2008-03-03 16:08:34 -0800 | [diff] [blame] | 1265 | DEBUG("%s, ep %d, val %d\n", __func__, ep_index(ep), value); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1266 | |
| 1267 | spin_lock_irqsave(&ep->dev->lock, flags); |
| 1268 | |
| 1269 | if (ep_index(ep) == 0) { |
| 1270 | /* EP0 */ |
| 1271 | usb_set(EP0_SEND_STALL, ep->csr1); |
| 1272 | } else if (ep_is_in(ep)) { |
| 1273 | u32 csr = usb_read(ep->csr1); |
| 1274 | if (value && ((csr & USB_IN_CSR1_FIFO_NOT_EMPTY) |
| 1275 | || !list_empty(&ep->queue))) { |
| 1276 | /* |
| 1277 | * Attempts to halt IN endpoints will fail (returning -EAGAIN) |
| 1278 | * if any transfer requests are still queued, or if the controller |
Jan Engelhardt | 96de0e2 | 2007-10-19 23:21:04 +0200 | [diff] [blame] | 1279 | * FIFO still holds bytes that the host hasn't collected. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1280 | */ |
| 1281 | spin_unlock_irqrestore(&ep->dev->lock, flags); |
| 1282 | DEBUG |
| 1283 | ("Attempt to halt IN endpoint failed (returning -EAGAIN) %d %d\n", |
| 1284 | (csr & USB_IN_CSR1_FIFO_NOT_EMPTY), |
| 1285 | !list_empty(&ep->queue)); |
| 1286 | return -EAGAIN; |
| 1287 | } |
| 1288 | flush(ep); |
| 1289 | if (value) |
| 1290 | usb_set(USB_IN_CSR1_SEND_STALL, ep->csr1); |
| 1291 | else { |
| 1292 | usb_clear(USB_IN_CSR1_SEND_STALL, ep->csr1); |
| 1293 | usb_set(USB_IN_CSR1_CLR_DATA_TOGGLE, ep->csr1); |
| 1294 | } |
| 1295 | |
| 1296 | } else { |
| 1297 | |
| 1298 | flush(ep); |
| 1299 | if (value) |
| 1300 | usb_set(USB_OUT_CSR1_SEND_STALL, ep->csr1); |
| 1301 | else { |
| 1302 | usb_clear(USB_OUT_CSR1_SEND_STALL, ep->csr1); |
| 1303 | usb_set(USB_OUT_CSR1_CLR_DATA_REG, ep->csr1); |
| 1304 | } |
| 1305 | } |
| 1306 | |
| 1307 | if (value) { |
| 1308 | ep->stopped = 1; |
| 1309 | } else { |
| 1310 | ep->stopped = 0; |
| 1311 | } |
| 1312 | |
| 1313 | spin_unlock_irqrestore(&ep->dev->lock, flags); |
| 1314 | |
| 1315 | DEBUG("%s %s halted\n", _ep->name, value == 0 ? "NOT" : "IS"); |
| 1316 | |
| 1317 | return 0; |
| 1318 | } |
| 1319 | |
| 1320 | /** Return bytes in EP FIFO |
| 1321 | * NOTE: Sets INDEX register to EP |
| 1322 | */ |
| 1323 | static int lh7a40x_fifo_status(struct usb_ep *_ep) |
| 1324 | { |
| 1325 | u32 csr; |
| 1326 | int count = 0; |
| 1327 | struct lh7a40x_ep *ep; |
| 1328 | |
| 1329 | ep = container_of(_ep, struct lh7a40x_ep, ep); |
| 1330 | if (!_ep) { |
Harvey Harrison | 441b62c | 2008-03-03 16:08:34 -0800 | [diff] [blame] | 1331 | DEBUG("%s, bad ep\n", __func__); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1332 | return -ENODEV; |
| 1333 | } |
| 1334 | |
Harvey Harrison | 441b62c | 2008-03-03 16:08:34 -0800 | [diff] [blame] | 1335 | DEBUG("%s, %d\n", __func__, ep_index(ep)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1336 | |
| 1337 | /* LPD can't report unclaimed bytes from IN fifos */ |
| 1338 | if (ep_is_in(ep)) |
| 1339 | return -EOPNOTSUPP; |
| 1340 | |
| 1341 | usb_set_index(ep_index(ep)); |
| 1342 | |
| 1343 | csr = usb_read(ep->csr1); |
| 1344 | if (ep->dev->gadget.speed != USB_SPEED_UNKNOWN || |
| 1345 | csr & USB_OUT_CSR1_OUT_PKT_RDY) { |
| 1346 | count = usb_read(USB_OUT_FIFO_WC1); |
| 1347 | } |
| 1348 | |
| 1349 | return count; |
| 1350 | } |
| 1351 | |
| 1352 | /** Flush EP FIFO |
| 1353 | * NOTE: Sets INDEX register to EP |
| 1354 | */ |
| 1355 | static void lh7a40x_fifo_flush(struct usb_ep *_ep) |
| 1356 | { |
| 1357 | struct lh7a40x_ep *ep; |
| 1358 | |
| 1359 | ep = container_of(_ep, struct lh7a40x_ep, ep); |
| 1360 | if (unlikely(!_ep || (!ep->desc && ep->ep.name != ep0name))) { |
Harvey Harrison | 441b62c | 2008-03-03 16:08:34 -0800 | [diff] [blame] | 1361 | DEBUG("%s, bad ep\n", __func__); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1362 | return; |
| 1363 | } |
| 1364 | |
| 1365 | usb_set_index(ep_index(ep)); |
| 1366 | flush(ep); |
| 1367 | } |
| 1368 | |
| 1369 | /****************************************************************/ |
| 1370 | /* End Point 0 related functions */ |
| 1371 | /****************************************************************/ |
| 1372 | |
| 1373 | /* return: 0 = still running, 1 = completed, negative = errno */ |
| 1374 | static int write_fifo_ep0(struct lh7a40x_ep *ep, struct lh7a40x_request *req) |
| 1375 | { |
| 1376 | u32 max; |
| 1377 | unsigned count; |
| 1378 | int is_last; |
| 1379 | |
| 1380 | max = ep_maxpacket(ep); |
| 1381 | |
Harvey Harrison | 441b62c | 2008-03-03 16:08:34 -0800 | [diff] [blame] | 1382 | DEBUG_EP0("%s\n", __func__); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1383 | |
| 1384 | count = write_packet(ep, req, max); |
| 1385 | |
| 1386 | /* last packet is usually short (or a zlp) */ |
| 1387 | if (unlikely(count != max)) |
| 1388 | is_last = 1; |
| 1389 | else { |
| 1390 | if (likely(req->req.length != req->req.actual) || req->req.zero) |
| 1391 | is_last = 0; |
| 1392 | else |
| 1393 | is_last = 1; |
| 1394 | } |
| 1395 | |
Harvey Harrison | 441b62c | 2008-03-03 16:08:34 -0800 | [diff] [blame] | 1396 | 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] | 1397 | ep->ep.name, count, |
| 1398 | is_last ? "/L" : "", req->req.length - req->req.actual, req); |
| 1399 | |
| 1400 | /* requests complete when all IN data is in the FIFO */ |
| 1401 | if (is_last) { |
| 1402 | done(ep, req, 0); |
| 1403 | return 1; |
| 1404 | } |
| 1405 | |
| 1406 | return 0; |
| 1407 | } |
| 1408 | |
| 1409 | static __inline__ int lh7a40x_fifo_read(struct lh7a40x_ep *ep, |
| 1410 | unsigned char *cp, int max) |
| 1411 | { |
| 1412 | int bytes; |
| 1413 | int count = usb_read(USB_OUT_FIFO_WC1); |
| 1414 | volatile u32 *fifo = (volatile u32 *)ep->fifo; |
| 1415 | |
| 1416 | if (count > max) |
| 1417 | count = max; |
| 1418 | bytes = count; |
| 1419 | while (count--) |
| 1420 | *cp++ = *fifo & 0xFF; |
| 1421 | return bytes; |
| 1422 | } |
| 1423 | |
| 1424 | static __inline__ void lh7a40x_fifo_write(struct lh7a40x_ep *ep, |
| 1425 | unsigned char *cp, int count) |
| 1426 | { |
| 1427 | volatile u32 *fifo = (volatile u32 *)ep->fifo; |
| 1428 | DEBUG_EP0("fifo_write: %d %d\n", ep_index(ep), count); |
| 1429 | while (count--) |
| 1430 | *fifo = *cp++; |
| 1431 | } |
| 1432 | |
| 1433 | static int read_fifo_ep0(struct lh7a40x_ep *ep, struct lh7a40x_request *req) |
| 1434 | { |
| 1435 | u32 csr; |
| 1436 | u8 *buf; |
| 1437 | unsigned bufferspace, count, is_short; |
| 1438 | volatile u32 *fifo = (volatile u32 *)ep->fifo; |
| 1439 | |
Harvey Harrison | 441b62c | 2008-03-03 16:08:34 -0800 | [diff] [blame] | 1440 | DEBUG_EP0("%s\n", __func__); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1441 | |
| 1442 | csr = usb_read(USB_EP0_CSR); |
| 1443 | if (!(csr & USB_OUT_CSR1_OUT_PKT_RDY)) |
| 1444 | return 0; |
| 1445 | |
| 1446 | buf = req->req.buf + req->req.actual; |
| 1447 | prefetchw(buf); |
| 1448 | bufferspace = req->req.length - req->req.actual; |
| 1449 | |
| 1450 | /* read all bytes from this packet */ |
| 1451 | if (likely(csr & EP0_OUT_PKT_RDY)) { |
| 1452 | count = usb_read(USB_OUT_FIFO_WC1); |
| 1453 | req->req.actual += min(count, bufferspace); |
| 1454 | } else /* zlp */ |
| 1455 | count = 0; |
| 1456 | |
| 1457 | is_short = (count < ep->ep.maxpacket); |
| 1458 | DEBUG_EP0("read %s %02x, %d bytes%s req %p %d/%d\n", |
| 1459 | ep->ep.name, csr, count, |
| 1460 | is_short ? "/S" : "", req, req->req.actual, req->req.length); |
| 1461 | |
| 1462 | while (likely(count-- != 0)) { |
| 1463 | u8 byte = (u8) (*fifo & 0xff); |
| 1464 | |
| 1465 | if (unlikely(bufferspace == 0)) { |
| 1466 | /* this happens when the driver's buffer |
| 1467 | * is smaller than what the host sent. |
| 1468 | * discard the extra data. |
| 1469 | */ |
| 1470 | if (req->req.status != -EOVERFLOW) |
| 1471 | DEBUG_EP0("%s overflow %d\n", ep->ep.name, |
| 1472 | count); |
| 1473 | req->req.status = -EOVERFLOW; |
| 1474 | } else { |
| 1475 | *buf++ = byte; |
| 1476 | bufferspace--; |
| 1477 | } |
| 1478 | } |
| 1479 | |
| 1480 | /* completion */ |
| 1481 | if (is_short || req->req.actual == req->req.length) { |
| 1482 | done(ep, req, 0); |
| 1483 | return 1; |
| 1484 | } |
| 1485 | |
| 1486 | /* finished that packet. the next one may be waiting... */ |
| 1487 | return 0; |
| 1488 | } |
| 1489 | |
| 1490 | /** |
| 1491 | * udc_set_address - set the USB address for this device |
| 1492 | * @address: |
| 1493 | * |
| 1494 | * Called from control endpoint function after it decodes a set address setup packet. |
| 1495 | */ |
| 1496 | static void udc_set_address(struct lh7a40x_udc *dev, unsigned char address) |
| 1497 | { |
Harvey Harrison | 441b62c | 2008-03-03 16:08:34 -0800 | [diff] [blame] | 1498 | DEBUG_EP0("%s: %d\n", __func__, address); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1499 | /* c.f. 15.1.2.2 Table 15-4 address will be used after DATA_END is set */ |
| 1500 | dev->usb_address = address; |
| 1501 | usb_set((address & USB_FA_FUNCTION_ADDR), USB_FA); |
| 1502 | usb_set(USB_FA_ADDR_UPDATE | (address & USB_FA_FUNCTION_ADDR), USB_FA); |
| 1503 | /* usb_read(USB_FA); */ |
| 1504 | } |
| 1505 | |
| 1506 | /* |
| 1507 | * DATA_STATE_RECV (OUT_PKT_RDY) |
| 1508 | * - if error |
| 1509 | * set EP0_CLR_OUT | EP0_DATA_END | EP0_SEND_STALL bits |
| 1510 | * - else |
| 1511 | * set EP0_CLR_OUT bit |
| 1512 | if last set EP0_DATA_END bit |
| 1513 | */ |
| 1514 | static void lh7a40x_ep0_out(struct lh7a40x_udc *dev, u32 csr) |
| 1515 | { |
| 1516 | struct lh7a40x_request *req; |
| 1517 | struct lh7a40x_ep *ep = &dev->ep[0]; |
| 1518 | int ret; |
| 1519 | |
Harvey Harrison | 441b62c | 2008-03-03 16:08:34 -0800 | [diff] [blame] | 1520 | DEBUG_EP0("%s: %x\n", __func__, csr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1521 | |
| 1522 | if (list_empty(&ep->queue)) |
| 1523 | req = 0; |
| 1524 | else |
| 1525 | req = list_entry(ep->queue.next, struct lh7a40x_request, queue); |
| 1526 | |
| 1527 | if (req) { |
| 1528 | |
| 1529 | if (req->req.length == 0) { |
| 1530 | DEBUG_EP0("ZERO LENGTH OUT!\n"); |
| 1531 | usb_set((EP0_CLR_OUT | EP0_DATA_END), USB_EP0_CSR); |
| 1532 | dev->ep0state = WAIT_FOR_SETUP; |
| 1533 | return; |
| 1534 | } |
| 1535 | ret = read_fifo_ep0(ep, req); |
| 1536 | if (ret) { |
| 1537 | /* Done! */ |
| 1538 | DEBUG_EP0("%s: finished, waiting for status\n", |
Harvey Harrison | 441b62c | 2008-03-03 16:08:34 -0800 | [diff] [blame] | 1539 | __func__); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1540 | |
| 1541 | usb_set((EP0_CLR_OUT | EP0_DATA_END), USB_EP0_CSR); |
| 1542 | dev->ep0state = WAIT_FOR_SETUP; |
| 1543 | } else { |
| 1544 | /* Not done yet.. */ |
Harvey Harrison | 441b62c | 2008-03-03 16:08:34 -0800 | [diff] [blame] | 1545 | DEBUG_EP0("%s: not finished\n", __func__); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1546 | usb_set(EP0_CLR_OUT, USB_EP0_CSR); |
| 1547 | } |
| 1548 | } else { |
| 1549 | DEBUG_EP0("NO REQ??!\n"); |
| 1550 | } |
| 1551 | } |
| 1552 | |
| 1553 | /* |
| 1554 | * DATA_STATE_XMIT |
| 1555 | */ |
| 1556 | static int lh7a40x_ep0_in(struct lh7a40x_udc *dev, u32 csr) |
| 1557 | { |
| 1558 | struct lh7a40x_request *req; |
| 1559 | struct lh7a40x_ep *ep = &dev->ep[0]; |
| 1560 | int ret, need_zlp = 0; |
| 1561 | |
Harvey Harrison | 441b62c | 2008-03-03 16:08:34 -0800 | [diff] [blame] | 1562 | DEBUG_EP0("%s: %x\n", __func__, csr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1563 | |
| 1564 | if (list_empty(&ep->queue)) |
| 1565 | req = 0; |
| 1566 | else |
| 1567 | req = list_entry(ep->queue.next, struct lh7a40x_request, queue); |
| 1568 | |
| 1569 | if (!req) { |
Harvey Harrison | 441b62c | 2008-03-03 16:08:34 -0800 | [diff] [blame] | 1570 | DEBUG_EP0("%s: NULL REQ\n", __func__); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1571 | return 0; |
| 1572 | } |
| 1573 | |
| 1574 | if (req->req.length == 0) { |
| 1575 | |
| 1576 | usb_set((EP0_IN_PKT_RDY | EP0_DATA_END), USB_EP0_CSR); |
| 1577 | dev->ep0state = WAIT_FOR_SETUP; |
| 1578 | return 1; |
| 1579 | } |
| 1580 | |
| 1581 | if (req->req.length - req->req.actual == EP0_PACKETSIZE) { |
| 1582 | /* Next write will end with the packet size, */ |
| 1583 | /* so we need Zero-length-packet */ |
| 1584 | need_zlp = 1; |
| 1585 | } |
| 1586 | |
| 1587 | ret = write_fifo_ep0(ep, req); |
| 1588 | |
| 1589 | if (ret == 1 && !need_zlp) { |
| 1590 | /* Last packet */ |
Harvey Harrison | 441b62c | 2008-03-03 16:08:34 -0800 | [diff] [blame] | 1591 | DEBUG_EP0("%s: finished, waiting for status\n", __func__); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1592 | |
| 1593 | usb_set((EP0_IN_PKT_RDY | EP0_DATA_END), USB_EP0_CSR); |
| 1594 | dev->ep0state = WAIT_FOR_SETUP; |
| 1595 | } else { |
Harvey Harrison | 441b62c | 2008-03-03 16:08:34 -0800 | [diff] [blame] | 1596 | DEBUG_EP0("%s: not finished\n", __func__); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1597 | usb_set(EP0_IN_PKT_RDY, USB_EP0_CSR); |
| 1598 | } |
| 1599 | |
| 1600 | if (need_zlp) { |
Harvey Harrison | 441b62c | 2008-03-03 16:08:34 -0800 | [diff] [blame] | 1601 | DEBUG_EP0("%s: Need ZLP!\n", __func__); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1602 | usb_set(EP0_IN_PKT_RDY, USB_EP0_CSR); |
| 1603 | dev->ep0state = DATA_STATE_NEED_ZLP; |
| 1604 | } |
| 1605 | |
| 1606 | return 1; |
| 1607 | } |
| 1608 | |
| 1609 | static int lh7a40x_handle_get_status(struct lh7a40x_udc *dev, |
| 1610 | struct usb_ctrlrequest *ctrl) |
| 1611 | { |
| 1612 | struct lh7a40x_ep *ep0 = &dev->ep[0]; |
| 1613 | struct lh7a40x_ep *qep; |
| 1614 | int reqtype = (ctrl->bRequestType & USB_RECIP_MASK); |
| 1615 | u16 val = 0; |
| 1616 | |
| 1617 | if (reqtype == USB_RECIP_INTERFACE) { |
| 1618 | /* This is not supported. |
| 1619 | * And according to the USB spec, this one does nothing.. |
| 1620 | * Just return 0 |
| 1621 | */ |
| 1622 | DEBUG_SETUP("GET_STATUS: USB_RECIP_INTERFACE\n"); |
| 1623 | } else if (reqtype == USB_RECIP_DEVICE) { |
| 1624 | DEBUG_SETUP("GET_STATUS: USB_RECIP_DEVICE\n"); |
| 1625 | val |= (1 << 0); /* Self powered */ |
| 1626 | /*val |= (1<<1); *//* Remote wakeup */ |
| 1627 | } else if (reqtype == USB_RECIP_ENDPOINT) { |
| 1628 | int ep_num = (ctrl->wIndex & ~USB_DIR_IN); |
| 1629 | |
| 1630 | DEBUG_SETUP |
| 1631 | ("GET_STATUS: USB_RECIP_ENDPOINT (%d), ctrl->wLength = %d\n", |
| 1632 | ep_num, ctrl->wLength); |
| 1633 | |
| 1634 | if (ctrl->wLength > 2 || ep_num > 3) |
| 1635 | return -EOPNOTSUPP; |
| 1636 | |
| 1637 | qep = &dev->ep[ep_num]; |
| 1638 | if (ep_is_in(qep) != ((ctrl->wIndex & USB_DIR_IN) ? 1 : 0) |
| 1639 | && ep_index(qep) != 0) { |
| 1640 | return -EOPNOTSUPP; |
| 1641 | } |
| 1642 | |
| 1643 | usb_set_index(ep_index(qep)); |
| 1644 | |
| 1645 | /* Return status on next IN token */ |
| 1646 | switch (qep->ep_type) { |
| 1647 | case ep_control: |
| 1648 | val = |
| 1649 | (usb_read(qep->csr1) & EP0_SEND_STALL) == |
| 1650 | EP0_SEND_STALL; |
| 1651 | break; |
| 1652 | case ep_bulk_in: |
| 1653 | case ep_interrupt: |
| 1654 | val = |
| 1655 | (usb_read(qep->csr1) & USB_IN_CSR1_SEND_STALL) == |
| 1656 | USB_IN_CSR1_SEND_STALL; |
| 1657 | break; |
| 1658 | case ep_bulk_out: |
| 1659 | val = |
| 1660 | (usb_read(qep->csr1) & USB_OUT_CSR1_SEND_STALL) == |
| 1661 | USB_OUT_CSR1_SEND_STALL; |
| 1662 | break; |
| 1663 | } |
| 1664 | |
| 1665 | /* Back to EP0 index */ |
| 1666 | usb_set_index(0); |
| 1667 | |
| 1668 | DEBUG_SETUP("GET_STATUS, ep: %d (%x), val = %d\n", ep_num, |
| 1669 | ctrl->wIndex, val); |
| 1670 | } else { |
| 1671 | DEBUG_SETUP("Unknown REQ TYPE: %d\n", reqtype); |
| 1672 | return -EOPNOTSUPP; |
| 1673 | } |
| 1674 | |
| 1675 | /* Clear "out packet ready" */ |
| 1676 | usb_set((EP0_CLR_OUT), USB_EP0_CSR); |
| 1677 | /* Put status to FIFO */ |
| 1678 | lh7a40x_fifo_write(ep0, (u8 *) & val, sizeof(val)); |
| 1679 | /* Issue "In packet ready" */ |
| 1680 | usb_set((EP0_IN_PKT_RDY | EP0_DATA_END), USB_EP0_CSR); |
| 1681 | |
| 1682 | return 0; |
| 1683 | } |
| 1684 | |
| 1685 | /* |
| 1686 | * WAIT_FOR_SETUP (OUT_PKT_RDY) |
| 1687 | * - read data packet from EP0 FIFO |
| 1688 | * - decode command |
| 1689 | * - if error |
| 1690 | * set EP0_CLR_OUT | EP0_DATA_END | EP0_SEND_STALL bits |
| 1691 | * - else |
| 1692 | * set EP0_CLR_OUT | EP0_DATA_END bits |
| 1693 | */ |
| 1694 | static void lh7a40x_ep0_setup(struct lh7a40x_udc *dev, u32 csr) |
| 1695 | { |
| 1696 | struct lh7a40x_ep *ep = &dev->ep[0]; |
| 1697 | struct usb_ctrlrequest ctrl; |
| 1698 | int i, bytes, is_in; |
| 1699 | |
Harvey Harrison | 441b62c | 2008-03-03 16:08:34 -0800 | [diff] [blame] | 1700 | DEBUG_SETUP("%s: %x\n", __func__, csr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1701 | |
| 1702 | /* Nuke all previous transfers */ |
| 1703 | nuke(ep, -EPROTO); |
| 1704 | |
| 1705 | /* read control req from fifo (8 bytes) */ |
| 1706 | bytes = lh7a40x_fifo_read(ep, (unsigned char *)&ctrl, 8); |
| 1707 | |
| 1708 | DEBUG_SETUP("Read CTRL REQ %d bytes\n", bytes); |
| 1709 | DEBUG_SETUP("CTRL.bRequestType = %d (is_in %d)\n", ctrl.bRequestType, |
| 1710 | ctrl.bRequestType == USB_DIR_IN); |
| 1711 | DEBUG_SETUP("CTRL.bRequest = %d\n", ctrl.bRequest); |
| 1712 | DEBUG_SETUP("CTRL.wLength = %d\n", ctrl.wLength); |
| 1713 | DEBUG_SETUP("CTRL.wValue = %d (%d)\n", ctrl.wValue, ctrl.wValue >> 8); |
| 1714 | DEBUG_SETUP("CTRL.wIndex = %d\n", ctrl.wIndex); |
| 1715 | |
| 1716 | /* Set direction of EP0 */ |
| 1717 | if (likely(ctrl.bRequestType & USB_DIR_IN)) { |
| 1718 | ep->bEndpointAddress |= USB_DIR_IN; |
| 1719 | is_in = 1; |
| 1720 | } else { |
| 1721 | ep->bEndpointAddress &= ~USB_DIR_IN; |
| 1722 | is_in = 0; |
| 1723 | } |
| 1724 | |
| 1725 | dev->req_pending = 1; |
| 1726 | |
| 1727 | /* Handle some SETUP packets ourselves */ |
| 1728 | switch (ctrl.bRequest) { |
| 1729 | case USB_REQ_SET_ADDRESS: |
| 1730 | if (ctrl.bRequestType != (USB_TYPE_STANDARD | USB_RECIP_DEVICE)) |
| 1731 | break; |
| 1732 | |
| 1733 | DEBUG_SETUP("USB_REQ_SET_ADDRESS (%d)\n", ctrl.wValue); |
| 1734 | udc_set_address(dev, ctrl.wValue); |
| 1735 | usb_set((EP0_CLR_OUT | EP0_DATA_END), USB_EP0_CSR); |
| 1736 | return; |
| 1737 | |
| 1738 | case USB_REQ_GET_STATUS:{ |
| 1739 | if (lh7a40x_handle_get_status(dev, &ctrl) == 0) |
| 1740 | return; |
| 1741 | |
| 1742 | case USB_REQ_CLEAR_FEATURE: |
| 1743 | case USB_REQ_SET_FEATURE: |
| 1744 | if (ctrl.bRequestType == USB_RECIP_ENDPOINT) { |
| 1745 | struct lh7a40x_ep *qep; |
| 1746 | int ep_num = (ctrl.wIndex & 0x0f); |
| 1747 | |
| 1748 | /* Support only HALT feature */ |
| 1749 | if (ctrl.wValue != 0 || ctrl.wLength != 0 |
| 1750 | || ep_num > 3 || ep_num < 1) |
| 1751 | break; |
| 1752 | |
| 1753 | qep = &dev->ep[ep_num]; |
Franck Bui-Huu | d5ec334 | 2006-02-23 09:35:06 +0100 | [diff] [blame] | 1754 | spin_unlock(&dev->lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1755 | if (ctrl.bRequest == USB_REQ_SET_FEATURE) { |
| 1756 | DEBUG_SETUP("SET_FEATURE (%d)\n", |
| 1757 | ep_num); |
| 1758 | lh7a40x_set_halt(&qep->ep, 1); |
| 1759 | } else { |
| 1760 | DEBUG_SETUP("CLR_FEATURE (%d)\n", |
| 1761 | ep_num); |
| 1762 | lh7a40x_set_halt(&qep->ep, 0); |
| 1763 | } |
Franck Bui-Huu | d5ec334 | 2006-02-23 09:35:06 +0100 | [diff] [blame] | 1764 | spin_lock(&dev->lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1765 | usb_set_index(0); |
| 1766 | |
| 1767 | /* Reply with a ZLP on next IN token */ |
| 1768 | usb_set((EP0_CLR_OUT | EP0_DATA_END), |
| 1769 | USB_EP0_CSR); |
| 1770 | return; |
| 1771 | } |
| 1772 | break; |
| 1773 | } |
| 1774 | |
| 1775 | default: |
| 1776 | break; |
| 1777 | } |
| 1778 | |
| 1779 | if (likely(dev->driver)) { |
| 1780 | /* device-2-host (IN) or no data setup command, process immediately */ |
| 1781 | spin_unlock(&dev->lock); |
| 1782 | i = dev->driver->setup(&dev->gadget, &ctrl); |
| 1783 | spin_lock(&dev->lock); |
| 1784 | |
| 1785 | if (i < 0) { |
| 1786 | /* setup processing failed, force stall */ |
| 1787 | DEBUG_SETUP |
| 1788 | (" --> ERROR: gadget setup FAILED (stalling), setup returned %d\n", |
| 1789 | i); |
| 1790 | usb_set_index(0); |
| 1791 | usb_set((EP0_CLR_OUT | EP0_DATA_END | EP0_SEND_STALL), |
| 1792 | USB_EP0_CSR); |
| 1793 | |
| 1794 | /* ep->stopped = 1; */ |
| 1795 | dev->ep0state = WAIT_FOR_SETUP; |
| 1796 | } |
| 1797 | } |
| 1798 | } |
| 1799 | |
| 1800 | /* |
| 1801 | * DATA_STATE_NEED_ZLP |
| 1802 | */ |
| 1803 | static void lh7a40x_ep0_in_zlp(struct lh7a40x_udc *dev, u32 csr) |
| 1804 | { |
Harvey Harrison | 441b62c | 2008-03-03 16:08:34 -0800 | [diff] [blame] | 1805 | DEBUG_EP0("%s: %x\n", __func__, csr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1806 | |
| 1807 | /* c.f. Table 15-14 */ |
| 1808 | usb_set((EP0_IN_PKT_RDY | EP0_DATA_END), USB_EP0_CSR); |
| 1809 | dev->ep0state = WAIT_FOR_SETUP; |
| 1810 | } |
| 1811 | |
| 1812 | /* |
| 1813 | * handle ep0 interrupt |
| 1814 | */ |
| 1815 | static void lh7a40x_handle_ep0(struct lh7a40x_udc *dev, u32 intr) |
| 1816 | { |
| 1817 | struct lh7a40x_ep *ep = &dev->ep[0]; |
| 1818 | u32 csr; |
| 1819 | |
| 1820 | /* Set index 0 */ |
| 1821 | usb_set_index(0); |
| 1822 | csr = usb_read(USB_EP0_CSR); |
| 1823 | |
Harvey Harrison | 441b62c | 2008-03-03 16:08:34 -0800 | [diff] [blame] | 1824 | DEBUG_EP0("%s: csr = %x\n", __func__, csr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1825 | |
| 1826 | /* |
| 1827 | * For overview of what we should be doing see c.f. Chapter 18.1.2.4 |
| 1828 | * We will follow that outline here modified by our own global state |
| 1829 | * indication which provides hints as to what we think should be |
| 1830 | * happening.. |
| 1831 | */ |
| 1832 | |
| 1833 | /* |
| 1834 | * if SENT_STALL is set |
| 1835 | * - clear the SENT_STALL bit |
| 1836 | */ |
| 1837 | if (csr & EP0_SENT_STALL) { |
Harvey Harrison | 441b62c | 2008-03-03 16:08:34 -0800 | [diff] [blame] | 1838 | DEBUG_EP0("%s: EP0_SENT_STALL is set: %x\n", __func__, csr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1839 | usb_clear((EP0_SENT_STALL | EP0_SEND_STALL), USB_EP0_CSR); |
| 1840 | nuke(ep, -ECONNABORTED); |
| 1841 | dev->ep0state = WAIT_FOR_SETUP; |
| 1842 | return; |
| 1843 | } |
| 1844 | |
| 1845 | /* |
| 1846 | * if a transfer is in progress && IN_PKT_RDY and OUT_PKT_RDY are clear |
| 1847 | * - fill EP0 FIFO |
| 1848 | * - if last packet |
| 1849 | * - set IN_PKT_RDY | DATA_END |
| 1850 | * - else |
| 1851 | * set IN_PKT_RDY |
| 1852 | */ |
| 1853 | if (!(csr & (EP0_IN_PKT_RDY | EP0_OUT_PKT_RDY))) { |
| 1854 | 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] | 1855 | __func__); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1856 | |
| 1857 | switch (dev->ep0state) { |
| 1858 | case DATA_STATE_XMIT: |
| 1859 | DEBUG_EP0("continue with DATA_STATE_XMIT\n"); |
| 1860 | lh7a40x_ep0_in(dev, csr); |
| 1861 | return; |
| 1862 | case DATA_STATE_NEED_ZLP: |
| 1863 | DEBUG_EP0("continue with DATA_STATE_NEED_ZLP\n"); |
| 1864 | lh7a40x_ep0_in_zlp(dev, csr); |
| 1865 | return; |
| 1866 | default: |
| 1867 | /* Stall? */ |
| 1868 | DEBUG_EP0("Odd state!! state = %s\n", |
| 1869 | state_names[dev->ep0state]); |
| 1870 | dev->ep0state = WAIT_FOR_SETUP; |
| 1871 | /* nuke(ep, 0); */ |
| 1872 | /* usb_set(EP0_SEND_STALL, ep->csr1); */ |
| 1873 | break; |
| 1874 | } |
| 1875 | } |
| 1876 | |
| 1877 | /* |
| 1878 | * if SETUP_END is set |
| 1879 | * - abort the last transfer |
| 1880 | * - set SERVICED_SETUP_END_BIT |
| 1881 | */ |
| 1882 | if (csr & EP0_SETUP_END) { |
Harvey Harrison | 441b62c | 2008-03-03 16:08:34 -0800 | [diff] [blame] | 1883 | DEBUG_EP0("%s: EP0_SETUP_END is set: %x\n", __func__, csr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1884 | |
| 1885 | usb_set(EP0_CLR_SETUP_END, USB_EP0_CSR); |
| 1886 | |
| 1887 | nuke(ep, 0); |
| 1888 | dev->ep0state = WAIT_FOR_SETUP; |
| 1889 | } |
| 1890 | |
| 1891 | /* |
| 1892 | * if EP0_OUT_PKT_RDY is set |
| 1893 | * - read data packet from EP0 FIFO |
| 1894 | * - decode command |
| 1895 | * - if error |
| 1896 | * set SERVICED_OUT_PKT_RDY | DATA_END bits | SEND_STALL |
| 1897 | * - else |
| 1898 | * set SERVICED_OUT_PKT_RDY | DATA_END bits |
| 1899 | */ |
| 1900 | if (csr & EP0_OUT_PKT_RDY) { |
| 1901 | |
Harvey Harrison | 441b62c | 2008-03-03 16:08:34 -0800 | [diff] [blame] | 1902 | DEBUG_EP0("%s: EP0_OUT_PKT_RDY is set: %x\n", __func__, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1903 | csr); |
| 1904 | |
| 1905 | switch (dev->ep0state) { |
| 1906 | case WAIT_FOR_SETUP: |
| 1907 | DEBUG_EP0("WAIT_FOR_SETUP\n"); |
| 1908 | lh7a40x_ep0_setup(dev, csr); |
| 1909 | break; |
| 1910 | |
| 1911 | case DATA_STATE_RECV: |
| 1912 | DEBUG_EP0("DATA_STATE_RECV\n"); |
| 1913 | lh7a40x_ep0_out(dev, csr); |
| 1914 | break; |
| 1915 | |
| 1916 | default: |
| 1917 | /* send stall? */ |
| 1918 | DEBUG_EP0("strange state!! 2. send stall? state = %d\n", |
| 1919 | dev->ep0state); |
| 1920 | break; |
| 1921 | } |
| 1922 | } |
| 1923 | } |
| 1924 | |
| 1925 | static void lh7a40x_ep0_kick(struct lh7a40x_udc *dev, struct lh7a40x_ep *ep) |
| 1926 | { |
| 1927 | u32 csr; |
| 1928 | |
| 1929 | usb_set_index(0); |
| 1930 | csr = usb_read(USB_EP0_CSR); |
| 1931 | |
Harvey Harrison | 441b62c | 2008-03-03 16:08:34 -0800 | [diff] [blame] | 1932 | DEBUG_EP0("%s: %x\n", __func__, csr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1933 | |
| 1934 | /* Clear "out packet ready" */ |
| 1935 | usb_set(EP0_CLR_OUT, USB_EP0_CSR); |
| 1936 | |
| 1937 | if (ep_is_in(ep)) { |
| 1938 | dev->ep0state = DATA_STATE_XMIT; |
| 1939 | lh7a40x_ep0_in(dev, csr); |
| 1940 | } else { |
| 1941 | dev->ep0state = DATA_STATE_RECV; |
| 1942 | lh7a40x_ep0_out(dev, csr); |
| 1943 | } |
| 1944 | } |
| 1945 | |
| 1946 | /* --------------------------------------------------------------------------- |
| 1947 | * device-scoped parts of the api to the usb controller hardware |
| 1948 | * --------------------------------------------------------------------------- |
| 1949 | */ |
| 1950 | |
| 1951 | static int lh7a40x_udc_get_frame(struct usb_gadget *_gadget) |
| 1952 | { |
| 1953 | u32 frame1 = usb_read(USB_FRM_NUM1); /* Least significant 8 bits */ |
| 1954 | u32 frame2 = usb_read(USB_FRM_NUM2); /* Most significant 3 bits */ |
Harvey Harrison | 441b62c | 2008-03-03 16:08:34 -0800 | [diff] [blame] | 1955 | DEBUG("%s, %p\n", __func__, _gadget); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1956 | return ((frame2 & 0x07) << 8) | (frame1 & 0xff); |
| 1957 | } |
| 1958 | |
| 1959 | static int lh7a40x_udc_wakeup(struct usb_gadget *_gadget) |
| 1960 | { |
| 1961 | /* host may not have enabled remote wakeup */ |
| 1962 | /*if ((UDCCS0 & UDCCS0_DRWF) == 0) |
| 1963 | return -EHOSTUNREACH; |
| 1964 | udc_set_mask_UDCCR(UDCCR_RSM); */ |
| 1965 | return -ENOTSUPP; |
| 1966 | } |
| 1967 | |
| 1968 | static const struct usb_gadget_ops lh7a40x_udc_ops = { |
| 1969 | .get_frame = lh7a40x_udc_get_frame, |
| 1970 | .wakeup = lh7a40x_udc_wakeup, |
| 1971 | /* current versions must always be self-powered */ |
| 1972 | }; |
| 1973 | |
| 1974 | static void nop_release(struct device *dev) |
| 1975 | { |
Kay Sievers | 7071a3c | 2008-05-02 06:02:41 +0200 | [diff] [blame] | 1976 | DEBUG("%s %s\n", __func__, dev_name(dev)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1977 | } |
| 1978 | |
| 1979 | static struct lh7a40x_udc memory = { |
| 1980 | .usb_address = 0, |
| 1981 | |
| 1982 | .gadget = { |
| 1983 | .ops = &lh7a40x_udc_ops, |
| 1984 | .ep0 = &memory.ep[0].ep, |
| 1985 | .name = driver_name, |
| 1986 | .dev = { |
Kay Sievers | c682b17 | 2009-01-06 10:44:42 -0800 | [diff] [blame] | 1987 | .init_name = "gadget", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1988 | .release = nop_release, |
| 1989 | }, |
| 1990 | }, |
| 1991 | |
| 1992 | /* control endpoint */ |
| 1993 | .ep[0] = { |
| 1994 | .ep = { |
| 1995 | .name = ep0name, |
| 1996 | .ops = &lh7a40x_ep_ops, |
| 1997 | .maxpacket = EP0_PACKETSIZE, |
| 1998 | }, |
| 1999 | .dev = &memory, |
| 2000 | |
| 2001 | .bEndpointAddress = 0, |
| 2002 | .bmAttributes = 0, |
| 2003 | |
| 2004 | .ep_type = ep_control, |
| 2005 | .fifo = io_p2v(USB_EP0_FIFO), |
| 2006 | .csr1 = USB_EP0_CSR, |
| 2007 | .csr2 = USB_EP0_CSR, |
| 2008 | }, |
| 2009 | |
| 2010 | /* first group of endpoints */ |
| 2011 | .ep[1] = { |
| 2012 | .ep = { |
| 2013 | .name = "ep1in-bulk", |
| 2014 | .ops = &lh7a40x_ep_ops, |
| 2015 | .maxpacket = 64, |
| 2016 | }, |
| 2017 | .dev = &memory, |
| 2018 | |
| 2019 | .bEndpointAddress = USB_DIR_IN | 1, |
| 2020 | .bmAttributes = USB_ENDPOINT_XFER_BULK, |
| 2021 | |
| 2022 | .ep_type = ep_bulk_in, |
| 2023 | .fifo = io_p2v(USB_EP1_FIFO), |
| 2024 | .csr1 = USB_IN_CSR1, |
| 2025 | .csr2 = USB_IN_CSR2, |
| 2026 | }, |
| 2027 | |
| 2028 | .ep[2] = { |
| 2029 | .ep = { |
| 2030 | .name = "ep2out-bulk", |
| 2031 | .ops = &lh7a40x_ep_ops, |
| 2032 | .maxpacket = 64, |
| 2033 | }, |
| 2034 | .dev = &memory, |
| 2035 | |
| 2036 | .bEndpointAddress = 2, |
| 2037 | .bmAttributes = USB_ENDPOINT_XFER_BULK, |
| 2038 | |
| 2039 | .ep_type = ep_bulk_out, |
| 2040 | .fifo = io_p2v(USB_EP2_FIFO), |
| 2041 | .csr1 = USB_OUT_CSR1, |
| 2042 | .csr2 = USB_OUT_CSR2, |
| 2043 | }, |
| 2044 | |
| 2045 | .ep[3] = { |
| 2046 | .ep = { |
| 2047 | .name = "ep3in-int", |
| 2048 | .ops = &lh7a40x_ep_ops, |
| 2049 | .maxpacket = 64, |
| 2050 | }, |
| 2051 | .dev = &memory, |
| 2052 | |
| 2053 | .bEndpointAddress = USB_DIR_IN | 3, |
| 2054 | .bmAttributes = USB_ENDPOINT_XFER_INT, |
| 2055 | |
| 2056 | .ep_type = ep_interrupt, |
| 2057 | .fifo = io_p2v(USB_EP3_FIFO), |
| 2058 | .csr1 = USB_IN_CSR1, |
| 2059 | .csr2 = USB_IN_CSR2, |
| 2060 | }, |
| 2061 | }; |
| 2062 | |
| 2063 | /* |
| 2064 | * probe - binds to the platform device |
| 2065 | */ |
Russell King | 3ae5eae | 2005-11-09 22:32:44 +0000 | [diff] [blame] | 2066 | static int lh7a40x_udc_probe(struct platform_device *pdev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2067 | { |
| 2068 | struct lh7a40x_udc *dev = &memory; |
| 2069 | int retval; |
| 2070 | |
Harvey Harrison | 441b62c | 2008-03-03 16:08:34 -0800 | [diff] [blame] | 2071 | DEBUG("%s: %p\n", __func__, pdev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2072 | |
| 2073 | spin_lock_init(&dev->lock); |
Russell King | 3ae5eae | 2005-11-09 22:32:44 +0000 | [diff] [blame] | 2074 | dev->dev = &pdev->dev; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2075 | |
| 2076 | device_initialize(&dev->gadget.dev); |
Russell King | 3ae5eae | 2005-11-09 22:32:44 +0000 | [diff] [blame] | 2077 | dev->gadget.dev.parent = &pdev->dev; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2078 | |
| 2079 | the_controller = dev; |
Russell King | 3ae5eae | 2005-11-09 22:32:44 +0000 | [diff] [blame] | 2080 | platform_set_drvdata(pdev, dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2081 | |
| 2082 | udc_disable(dev); |
| 2083 | udc_reinit(dev); |
| 2084 | |
| 2085 | /* irq setup after old hardware state is cleaned up */ |
| 2086 | retval = |
Thomas Gleixner | d54b5ca | 2006-07-01 19:29:44 -0700 | [diff] [blame] | 2087 | request_irq(IRQ_USBINTR, lh7a40x_udc_irq, IRQF_DISABLED, driver_name, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2088 | dev); |
| 2089 | if (retval != 0) { |
| 2090 | DEBUG(KERN_ERR "%s: can't get irq %i, err %d\n", driver_name, |
| 2091 | IRQ_USBINTR, retval); |
| 2092 | return -EBUSY; |
| 2093 | } |
| 2094 | |
| 2095 | create_proc_files(); |
| 2096 | |
| 2097 | return retval; |
| 2098 | } |
| 2099 | |
Russell King | 3ae5eae | 2005-11-09 22:32:44 +0000 | [diff] [blame] | 2100 | static int lh7a40x_udc_remove(struct platform_device *pdev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2101 | { |
Russell King | 3ae5eae | 2005-11-09 22:32:44 +0000 | [diff] [blame] | 2102 | struct lh7a40x_udc *dev = platform_get_drvdata(pdev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2103 | |
Harvey Harrison | 441b62c | 2008-03-03 16:08:34 -0800 | [diff] [blame] | 2104 | DEBUG("%s: %p\n", __func__, pdev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2105 | |
David Brownell | 6bea476 | 2006-12-05 03:15:33 -0800 | [diff] [blame] | 2106 | if (dev->driver) |
| 2107 | return -EBUSY; |
| 2108 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2109 | udc_disable(dev); |
| 2110 | remove_proc_files(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2111 | |
| 2112 | free_irq(IRQ_USBINTR, dev); |
| 2113 | |
Russell King | 3ae5eae | 2005-11-09 22:32:44 +0000 | [diff] [blame] | 2114 | platform_set_drvdata(pdev, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2115 | |
| 2116 | the_controller = 0; |
| 2117 | |
| 2118 | return 0; |
| 2119 | } |
| 2120 | |
| 2121 | /*-------------------------------------------------------------------------*/ |
| 2122 | |
Russell King | 3ae5eae | 2005-11-09 22:32:44 +0000 | [diff] [blame] | 2123 | static struct platform_driver udc_driver = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2124 | .probe = lh7a40x_udc_probe, |
Russell King | 0f1482f | 2006-07-03 15:32:47 +0100 | [diff] [blame] | 2125 | .remove = lh7a40x_udc_remove, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2126 | /* FIXME power management support */ |
| 2127 | /* .suspend = ... disable UDC */ |
| 2128 | /* .resume = ... re-enable UDC */ |
Russell King | 3ae5eae | 2005-11-09 22:32:44 +0000 | [diff] [blame] | 2129 | .driver = { |
| 2130 | .name = (char *)driver_name, |
| 2131 | .owner = THIS_MODULE, |
| 2132 | }, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2133 | }; |
| 2134 | |
| 2135 | static int __init udc_init(void) |
| 2136 | { |
Harvey Harrison | 441b62c | 2008-03-03 16:08:34 -0800 | [diff] [blame] | 2137 | DEBUG("%s: %s version %s\n", __func__, driver_name, DRIVER_VERSION); |
Russell King | 3ae5eae | 2005-11-09 22:32:44 +0000 | [diff] [blame] | 2138 | return platform_driver_register(&udc_driver); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2139 | } |
| 2140 | |
| 2141 | static void __exit udc_exit(void) |
| 2142 | { |
Russell King | 3ae5eae | 2005-11-09 22:32:44 +0000 | [diff] [blame] | 2143 | platform_driver_unregister(&udc_driver); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2144 | } |
| 2145 | |
| 2146 | module_init(udc_init); |
| 2147 | module_exit(udc_exit); |
| 2148 | |
| 2149 | MODULE_DESCRIPTION(DRIVER_DESC); |
| 2150 | MODULE_AUTHOR("Mikko Lahteenmaki, Bo Henriksen"); |
| 2151 | MODULE_LICENSE("GPL"); |
Kay Sievers | f34c32f | 2008-04-10 21:29:21 -0700 | [diff] [blame] | 2152 | MODULE_ALIAS("platform:lh7a40x_udc"); |