Anton Vorontsov | 236dd4d | 2009-01-10 05:03:21 +0300 | [diff] [blame] | 1 | /* |
| 2 | * Freescale QUICC Engine USB Host Controller Driver |
| 3 | * |
| 4 | * Copyright (c) Freescale Semicondutor, Inc. 2006. |
| 5 | * Shlomi Gridish <gridish@freescale.com> |
| 6 | * Jerry Huang <Chang-Ming.Huang@freescale.com> |
| 7 | * Copyright (c) Logic Product Development, Inc. 2007 |
| 8 | * Peter Barada <peterb@logicpd.com> |
| 9 | * Copyright (c) MontaVista Software, Inc. 2008. |
| 10 | * Anton Vorontsov <avorontsov@ru.mvista.com> |
| 11 | * |
| 12 | * This program is free software; you can redistribute it and/or modify it |
| 13 | * under the terms of the GNU General Public License as published by the |
| 14 | * Free Software Foundation; either version 2 of the License, or (at your |
| 15 | * option) any later version. |
| 16 | */ |
| 17 | |
| 18 | #include <linux/module.h> |
| 19 | #include <linux/types.h> |
| 20 | #include <linux/spinlock.h> |
| 21 | #include <linux/kernel.h> |
| 22 | #include <linux/delay.h> |
| 23 | #include <linux/errno.h> |
| 24 | #include <linux/list.h> |
| 25 | #include <linux/interrupt.h> |
| 26 | #include <linux/io.h> |
| 27 | #include <linux/usb.h> |
Eric Lescouet | 27729aa | 2010-04-24 23:21:52 +0200 | [diff] [blame] | 28 | #include <linux/usb/hcd.h> |
Anton Vorontsov | 236dd4d | 2009-01-10 05:03:21 +0300 | [diff] [blame] | 29 | #include <linux/of_platform.h> |
| 30 | #include <linux/of_gpio.h> |
Tejun Heo | 5a0e3ad | 2010-03-24 17:04:11 +0900 | [diff] [blame] | 31 | #include <linux/slab.h> |
Anton Vorontsov | 236dd4d | 2009-01-10 05:03:21 +0300 | [diff] [blame] | 32 | #include <asm/qe.h> |
| 33 | #include <asm/fsl_gtm.h> |
Anton Vorontsov | 236dd4d | 2009-01-10 05:03:21 +0300 | [diff] [blame] | 34 | #include "fhci.h" |
| 35 | |
| 36 | void fhci_start_sof_timer(struct fhci_hcd *fhci) |
| 37 | { |
| 38 | fhci_dbg(fhci, "-> %s\n", __func__); |
| 39 | |
| 40 | /* clear frame_n */ |
| 41 | out_be16(&fhci->pram->frame_num, 0); |
| 42 | |
| 43 | out_be16(&fhci->regs->usb_sof_tmr, 0); |
| 44 | setbits8(&fhci->regs->usb_mod, USB_MODE_SFTE); |
| 45 | |
| 46 | fhci_dbg(fhci, "<- %s\n", __func__); |
| 47 | } |
| 48 | |
| 49 | void fhci_stop_sof_timer(struct fhci_hcd *fhci) |
| 50 | { |
| 51 | fhci_dbg(fhci, "-> %s\n", __func__); |
| 52 | |
| 53 | clrbits8(&fhci->regs->usb_mod, USB_MODE_SFTE); |
| 54 | gtm_stop_timer16(fhci->timer); |
| 55 | |
| 56 | fhci_dbg(fhci, "<- %s\n", __func__); |
| 57 | } |
| 58 | |
| 59 | u16 fhci_get_sof_timer_count(struct fhci_usb *usb) |
| 60 | { |
| 61 | return be16_to_cpu(in_be16(&usb->fhci->regs->usb_sof_tmr) / 12); |
| 62 | } |
| 63 | |
| 64 | /* initialize the endpoint zero */ |
| 65 | static u32 endpoint_zero_init(struct fhci_usb *usb, |
| 66 | enum fhci_mem_alloc data_mem, |
| 67 | u32 ring_len) |
| 68 | { |
| 69 | u32 rc; |
| 70 | |
| 71 | rc = fhci_create_ep(usb, data_mem, ring_len); |
| 72 | if (rc) |
| 73 | return rc; |
| 74 | |
| 75 | /* inilialize endpoint registers */ |
| 76 | fhci_init_ep_registers(usb, usb->ep0, data_mem); |
| 77 | |
| 78 | return 0; |
| 79 | } |
| 80 | |
| 81 | /* enable the USB interrupts */ |
| 82 | void fhci_usb_enable_interrupt(struct fhci_usb *usb) |
| 83 | { |
| 84 | struct fhci_hcd *fhci = usb->fhci; |
| 85 | |
| 86 | if (usb->intr_nesting_cnt == 1) { |
| 87 | /* initialize the USB interrupt */ |
| 88 | enable_irq(fhci_to_hcd(fhci)->irq); |
| 89 | |
| 90 | /* initialize the event register and mask register */ |
| 91 | out_be16(&usb->fhci->regs->usb_event, 0xffff); |
| 92 | out_be16(&usb->fhci->regs->usb_mask, usb->saved_msk); |
| 93 | |
| 94 | /* enable the timer interrupts */ |
| 95 | enable_irq(fhci->timer->irq); |
| 96 | } else if (usb->intr_nesting_cnt > 1) |
| 97 | fhci_info(fhci, "unbalanced USB interrupts nesting\n"); |
| 98 | usb->intr_nesting_cnt--; |
| 99 | } |
| 100 | |
| 101 | /* diable the usb interrupt */ |
| 102 | void fhci_usb_disable_interrupt(struct fhci_usb *usb) |
| 103 | { |
| 104 | struct fhci_hcd *fhci = usb->fhci; |
| 105 | |
| 106 | if (usb->intr_nesting_cnt == 0) { |
| 107 | /* diable the timer interrupt */ |
| 108 | disable_irq_nosync(fhci->timer->irq); |
| 109 | |
| 110 | /* disable the usb interrupt */ |
| 111 | disable_irq_nosync(fhci_to_hcd(fhci)->irq); |
| 112 | out_be16(&usb->fhci->regs->usb_mask, 0); |
| 113 | } |
| 114 | usb->intr_nesting_cnt++; |
| 115 | } |
| 116 | |
| 117 | /* enable the USB controller */ |
| 118 | static u32 fhci_usb_enable(struct fhci_hcd *fhci) |
| 119 | { |
| 120 | struct fhci_usb *usb = fhci->usb_lld; |
| 121 | |
| 122 | out_be16(&usb->fhci->regs->usb_event, 0xffff); |
| 123 | out_be16(&usb->fhci->regs->usb_mask, usb->saved_msk); |
| 124 | setbits8(&usb->fhci->regs->usb_mod, USB_MODE_EN); |
| 125 | |
| 126 | mdelay(100); |
| 127 | |
| 128 | return 0; |
| 129 | } |
| 130 | |
| 131 | /* disable the USB controller */ |
| 132 | static u32 fhci_usb_disable(struct fhci_hcd *fhci) |
| 133 | { |
| 134 | struct fhci_usb *usb = fhci->usb_lld; |
| 135 | |
| 136 | fhci_usb_disable_interrupt(usb); |
| 137 | fhci_port_disable(fhci); |
| 138 | |
| 139 | /* disable the usb controller */ |
| 140 | if (usb->port_status == FHCI_PORT_FULL || |
| 141 | usb->port_status == FHCI_PORT_LOW) |
| 142 | fhci_device_disconnected_interrupt(fhci); |
| 143 | |
| 144 | clrbits8(&usb->fhci->regs->usb_mod, USB_MODE_EN); |
| 145 | |
| 146 | return 0; |
| 147 | } |
| 148 | |
| 149 | /* check the bus state by polling the QE bit on the IO ports */ |
| 150 | int fhci_ioports_check_bus_state(struct fhci_hcd *fhci) |
| 151 | { |
| 152 | u8 bits = 0; |
| 153 | |
| 154 | /* check USBOE,if transmitting,exit */ |
| 155 | if (!gpio_get_value(fhci->gpios[GPIO_USBOE])) |
| 156 | return -1; |
| 157 | |
| 158 | /* check USBRP */ |
| 159 | if (gpio_get_value(fhci->gpios[GPIO_USBRP])) |
| 160 | bits |= 0x2; |
| 161 | |
| 162 | /* check USBRN */ |
| 163 | if (gpio_get_value(fhci->gpios[GPIO_USBRN])) |
| 164 | bits |= 0x1; |
| 165 | |
| 166 | return bits; |
| 167 | } |
| 168 | |
| 169 | static void fhci_mem_free(struct fhci_hcd *fhci) |
| 170 | { |
| 171 | struct ed *ed; |
| 172 | struct ed *next_ed; |
| 173 | struct td *td; |
| 174 | struct td *next_td; |
| 175 | |
| 176 | list_for_each_entry_safe(ed, next_ed, &fhci->empty_eds, node) { |
| 177 | list_del(&ed->node); |
| 178 | kfree(ed); |
| 179 | } |
| 180 | |
| 181 | list_for_each_entry_safe(td, next_td, &fhci->empty_tds, node) { |
| 182 | list_del(&td->node); |
| 183 | kfree(td); |
| 184 | } |
| 185 | |
| 186 | kfree(fhci->vroot_hub); |
| 187 | fhci->vroot_hub = NULL; |
| 188 | |
| 189 | kfree(fhci->hc_list); |
| 190 | fhci->hc_list = NULL; |
| 191 | } |
| 192 | |
| 193 | static int fhci_mem_init(struct fhci_hcd *fhci) |
| 194 | { |
| 195 | int i; |
| 196 | |
| 197 | fhci->hc_list = kzalloc(sizeof(*fhci->hc_list), GFP_KERNEL); |
| 198 | if (!fhci->hc_list) |
| 199 | goto err; |
| 200 | |
| 201 | INIT_LIST_HEAD(&fhci->hc_list->ctrl_list); |
| 202 | INIT_LIST_HEAD(&fhci->hc_list->bulk_list); |
| 203 | INIT_LIST_HEAD(&fhci->hc_list->iso_list); |
| 204 | INIT_LIST_HEAD(&fhci->hc_list->intr_list); |
| 205 | INIT_LIST_HEAD(&fhci->hc_list->done_list); |
| 206 | |
| 207 | fhci->vroot_hub = kzalloc(sizeof(*fhci->vroot_hub), GFP_KERNEL); |
| 208 | if (!fhci->vroot_hub) |
| 209 | goto err; |
| 210 | |
| 211 | INIT_LIST_HEAD(&fhci->empty_eds); |
| 212 | INIT_LIST_HEAD(&fhci->empty_tds); |
| 213 | |
| 214 | /* initialize work queue to handle done list */ |
| 215 | fhci_tasklet.data = (unsigned long)fhci; |
| 216 | fhci->process_done_task = &fhci_tasklet; |
| 217 | |
| 218 | for (i = 0; i < MAX_TDS; i++) { |
| 219 | struct td *td; |
| 220 | |
| 221 | td = kmalloc(sizeof(*td), GFP_KERNEL); |
| 222 | if (!td) |
| 223 | goto err; |
| 224 | fhci_recycle_empty_td(fhci, td); |
| 225 | } |
| 226 | for (i = 0; i < MAX_EDS; i++) { |
| 227 | struct ed *ed; |
| 228 | |
| 229 | ed = kmalloc(sizeof(*ed), GFP_KERNEL); |
| 230 | if (!ed) |
| 231 | goto err; |
| 232 | fhci_recycle_empty_ed(fhci, ed); |
| 233 | } |
| 234 | |
| 235 | fhci->active_urbs = 0; |
| 236 | return 0; |
| 237 | err: |
| 238 | fhci_mem_free(fhci); |
| 239 | return -ENOMEM; |
| 240 | } |
| 241 | |
| 242 | /* destroy the fhci_usb structure */ |
| 243 | static void fhci_usb_free(void *lld) |
| 244 | { |
| 245 | struct fhci_usb *usb = lld; |
Alexander Beregalov | ae35fe9 | 2010-01-07 04:17:32 +0300 | [diff] [blame] | 246 | struct fhci_hcd *fhci; |
Anton Vorontsov | 236dd4d | 2009-01-10 05:03:21 +0300 | [diff] [blame] | 247 | |
| 248 | if (usb) { |
Alexander Beregalov | ae35fe9 | 2010-01-07 04:17:32 +0300 | [diff] [blame] | 249 | fhci = usb->fhci; |
Anton Vorontsov | 236dd4d | 2009-01-10 05:03:21 +0300 | [diff] [blame] | 250 | fhci_config_transceiver(fhci, FHCI_PORT_POWER_OFF); |
| 251 | fhci_ep0_free(usb); |
| 252 | kfree(usb->actual_frame); |
| 253 | kfree(usb); |
| 254 | } |
| 255 | } |
| 256 | |
| 257 | /* initialize the USB */ |
| 258 | static int fhci_usb_init(struct fhci_hcd *fhci) |
| 259 | { |
| 260 | struct fhci_usb *usb = fhci->usb_lld; |
| 261 | |
| 262 | memset_io(usb->fhci->pram, 0, FHCI_PRAM_SIZE); |
| 263 | |
| 264 | usb->port_status = FHCI_PORT_DISABLED; |
| 265 | usb->max_frame_usage = FRAME_TIME_USAGE; |
| 266 | usb->sw_transaction_time = SW_FIX_TIME_BETWEEN_TRANSACTION; |
| 267 | |
| 268 | usb->actual_frame = kzalloc(sizeof(*usb->actual_frame), GFP_KERNEL); |
| 269 | if (!usb->actual_frame) { |
| 270 | fhci_usb_free(usb); |
| 271 | return -ENOMEM; |
| 272 | } |
| 273 | |
| 274 | INIT_LIST_HEAD(&usb->actual_frame->tds_list); |
| 275 | |
| 276 | /* initializing registers on chip, clear frame number */ |
| 277 | out_be16(&fhci->pram->frame_num, 0); |
| 278 | |
| 279 | /* clear rx state */ |
| 280 | out_be32(&fhci->pram->rx_state, 0); |
| 281 | |
| 282 | /* set mask register */ |
| 283 | usb->saved_msk = (USB_E_TXB_MASK | |
| 284 | USB_E_TXE1_MASK | |
| 285 | USB_E_IDLE_MASK | |
| 286 | USB_E_RESET_MASK | USB_E_SFT_MASK | USB_E_MSF_MASK); |
| 287 | |
| 288 | out_8(&usb->fhci->regs->usb_mod, USB_MODE_HOST | USB_MODE_EN); |
| 289 | |
| 290 | /* clearing the mask register */ |
| 291 | out_be16(&usb->fhci->regs->usb_mask, 0); |
| 292 | |
| 293 | /* initialing the event register */ |
| 294 | out_be16(&usb->fhci->regs->usb_event, 0xffff); |
| 295 | |
| 296 | if (endpoint_zero_init(usb, DEFAULT_DATA_MEM, DEFAULT_RING_LEN) != 0) { |
| 297 | fhci_usb_free(usb); |
| 298 | return -EINVAL; |
| 299 | } |
| 300 | |
| 301 | return 0; |
| 302 | } |
| 303 | |
| 304 | /* initialize the fhci_usb struct and the corresponding data staruct */ |
| 305 | static struct fhci_usb *fhci_create_lld(struct fhci_hcd *fhci) |
| 306 | { |
| 307 | struct fhci_usb *usb; |
| 308 | |
| 309 | /* allocate memory for SCC data structure */ |
| 310 | usb = kzalloc(sizeof(*usb), GFP_KERNEL); |
| 311 | if (!usb) { |
| 312 | fhci_err(fhci, "no memory for SCC data struct\n"); |
| 313 | return NULL; |
| 314 | } |
| 315 | |
| 316 | usb->fhci = fhci; |
| 317 | usb->hc_list = fhci->hc_list; |
| 318 | usb->vroot_hub = fhci->vroot_hub; |
| 319 | |
| 320 | usb->transfer_confirm = fhci_transfer_confirm_callback; |
| 321 | |
| 322 | return usb; |
| 323 | } |
| 324 | |
| 325 | static int fhci_start(struct usb_hcd *hcd) |
| 326 | { |
| 327 | int ret; |
| 328 | struct fhci_hcd *fhci = hcd_to_fhci(hcd); |
| 329 | |
| 330 | ret = fhci_mem_init(fhci); |
| 331 | if (ret) { |
| 332 | fhci_err(fhci, "failed to allocate memory\n"); |
| 333 | goto err; |
| 334 | } |
| 335 | |
| 336 | fhci->usb_lld = fhci_create_lld(fhci); |
| 337 | if (!fhci->usb_lld) { |
| 338 | fhci_err(fhci, "low level driver config failed\n"); |
| 339 | ret = -ENOMEM; |
| 340 | goto err; |
| 341 | } |
| 342 | |
| 343 | ret = fhci_usb_init(fhci); |
| 344 | if (ret) { |
| 345 | fhci_err(fhci, "low level driver initialize failed\n"); |
| 346 | goto err; |
| 347 | } |
| 348 | |
| 349 | spin_lock_init(&fhci->lock); |
| 350 | |
| 351 | /* connect the virtual root hub */ |
| 352 | fhci->vroot_hub->dev_num = 1; /* this field may be needed to fix */ |
| 353 | fhci->vroot_hub->hub.wHubStatus = 0; |
| 354 | fhci->vroot_hub->hub.wHubChange = 0; |
| 355 | fhci->vroot_hub->port.wPortStatus = 0; |
| 356 | fhci->vroot_hub->port.wPortChange = 0; |
| 357 | |
| 358 | hcd->state = HC_STATE_RUNNING; |
| 359 | |
| 360 | /* |
| 361 | * From here on, khubd concurrently accesses the root |
| 362 | * hub; drivers will be talking to enumerated devices. |
| 363 | * (On restart paths, khubd already knows about the root |
| 364 | * hub and could find work as soon as we wrote FLAG_CF.) |
| 365 | * |
| 366 | * Before this point the HC was idle/ready. After, khubd |
| 367 | * and device drivers may start it running. |
| 368 | */ |
| 369 | fhci_usb_enable(fhci); |
| 370 | return 0; |
| 371 | err: |
| 372 | fhci_mem_free(fhci); |
| 373 | return ret; |
| 374 | } |
| 375 | |
| 376 | static void fhci_stop(struct usb_hcd *hcd) |
| 377 | { |
| 378 | struct fhci_hcd *fhci = hcd_to_fhci(hcd); |
| 379 | |
| 380 | fhci_usb_disable_interrupt(fhci->usb_lld); |
| 381 | fhci_usb_disable(fhci); |
| 382 | |
| 383 | fhci_usb_free(fhci->usb_lld); |
| 384 | fhci->usb_lld = NULL; |
| 385 | fhci_mem_free(fhci); |
| 386 | } |
| 387 | |
| 388 | static int fhci_urb_enqueue(struct usb_hcd *hcd, struct urb *urb, |
| 389 | gfp_t mem_flags) |
| 390 | { |
| 391 | struct fhci_hcd *fhci = hcd_to_fhci(hcd); |
| 392 | u32 pipe = urb->pipe; |
| 393 | int ret; |
| 394 | int i; |
| 395 | int size = 0; |
| 396 | struct urb_priv *urb_priv; |
| 397 | unsigned long flags; |
| 398 | |
| 399 | switch (usb_pipetype(pipe)) { |
| 400 | case PIPE_CONTROL: |
| 401 | /* 1 td fro setup,1 for ack */ |
| 402 | size = 2; |
| 403 | case PIPE_BULK: |
| 404 | /* one td for every 4096 bytes(can be upto 8k) */ |
| 405 | size += urb->transfer_buffer_length / 4096; |
| 406 | /* ...add for any remaining bytes... */ |
| 407 | if ((urb->transfer_buffer_length % 4096) != 0) |
| 408 | size++; |
| 409 | /* ..and maybe a zero length packet to wrap it up */ |
| 410 | if (size == 0) |
| 411 | size++; |
| 412 | else if ((urb->transfer_flags & URB_ZERO_PACKET) != 0 |
| 413 | && (urb->transfer_buffer_length |
| 414 | % usb_maxpacket(urb->dev, pipe, |
| 415 | usb_pipeout(pipe))) != 0) |
| 416 | size++; |
| 417 | break; |
| 418 | case PIPE_ISOCHRONOUS: |
| 419 | size = urb->number_of_packets; |
| 420 | if (size <= 0) |
| 421 | return -EINVAL; |
| 422 | for (i = 0; i < urb->number_of_packets; i++) { |
| 423 | urb->iso_frame_desc[i].actual_length = 0; |
| 424 | urb->iso_frame_desc[i].status = (u32) (-EXDEV); |
| 425 | } |
| 426 | break; |
| 427 | case PIPE_INTERRUPT: |
| 428 | size = 1; |
| 429 | } |
| 430 | |
| 431 | /* allocate the private part of the URB */ |
| 432 | urb_priv = kzalloc(sizeof(*urb_priv), mem_flags); |
| 433 | if (!urb_priv) |
| 434 | return -ENOMEM; |
| 435 | |
| 436 | /* allocate the private part of the URB */ |
Julia Lawall | 4585ef1 | 2009-12-30 15:34:37 +0100 | [diff] [blame] | 437 | urb_priv->tds = kcalloc(size, sizeof(*urb_priv->tds), mem_flags); |
Anton Vorontsov | 236dd4d | 2009-01-10 05:03:21 +0300 | [diff] [blame] | 438 | if (!urb_priv->tds) { |
| 439 | kfree(urb_priv); |
| 440 | return -ENOMEM; |
| 441 | } |
| 442 | |
| 443 | spin_lock_irqsave(&fhci->lock, flags); |
| 444 | |
| 445 | ret = usb_hcd_link_urb_to_ep(hcd, urb); |
| 446 | if (ret) |
| 447 | goto err; |
| 448 | |
| 449 | /* fill the private part of the URB */ |
| 450 | urb_priv->num_of_tds = size; |
| 451 | |
| 452 | urb->status = -EINPROGRESS; |
| 453 | urb->actual_length = 0; |
| 454 | urb->error_count = 0; |
| 455 | urb->hcpriv = urb_priv; |
| 456 | |
| 457 | fhci_queue_urb(fhci, urb); |
| 458 | err: |
| 459 | if (ret) { |
| 460 | kfree(urb_priv->tds); |
| 461 | kfree(urb_priv); |
| 462 | } |
| 463 | spin_unlock_irqrestore(&fhci->lock, flags); |
| 464 | return ret; |
| 465 | } |
| 466 | |
| 467 | /* dequeue FHCI URB */ |
| 468 | static int fhci_urb_dequeue(struct usb_hcd *hcd, struct urb *urb, int status) |
| 469 | { |
| 470 | struct fhci_hcd *fhci = hcd_to_fhci(hcd); |
| 471 | struct fhci_usb *usb = fhci->usb_lld; |
| 472 | int ret = -EINVAL; |
| 473 | unsigned long flags; |
| 474 | |
| 475 | if (!urb || !urb->dev || !urb->dev->bus) |
| 476 | goto out; |
| 477 | |
| 478 | spin_lock_irqsave(&fhci->lock, flags); |
| 479 | |
| 480 | ret = usb_hcd_check_unlink_urb(hcd, urb, status); |
| 481 | if (ret) |
| 482 | goto out2; |
| 483 | |
| 484 | if (usb->port_status != FHCI_PORT_DISABLED) { |
| 485 | struct urb_priv *urb_priv; |
| 486 | |
| 487 | /* |
| 488 | * flag the urb's data for deletion in some upcoming |
| 489 | * SF interrupt's delete list processing |
| 490 | */ |
| 491 | urb_priv = urb->hcpriv; |
| 492 | |
| 493 | if (!urb_priv || (urb_priv->state == URB_DEL)) |
| 494 | goto out2; |
| 495 | |
| 496 | urb_priv->state = URB_DEL; |
| 497 | |
| 498 | /* already pending? */ |
| 499 | urb_priv->ed->state = FHCI_ED_URB_DEL; |
| 500 | } else { |
| 501 | fhci_urb_complete_free(fhci, urb); |
| 502 | } |
| 503 | |
| 504 | out2: |
| 505 | spin_unlock_irqrestore(&fhci->lock, flags); |
| 506 | out: |
| 507 | return ret; |
| 508 | } |
| 509 | |
| 510 | static void fhci_endpoint_disable(struct usb_hcd *hcd, |
| 511 | struct usb_host_endpoint *ep) |
| 512 | { |
| 513 | struct fhci_hcd *fhci; |
| 514 | struct ed *ed; |
| 515 | unsigned long flags; |
| 516 | |
| 517 | fhci = hcd_to_fhci(hcd); |
| 518 | spin_lock_irqsave(&fhci->lock, flags); |
| 519 | ed = ep->hcpriv; |
| 520 | if (ed) { |
| 521 | while (ed->td_head != NULL) { |
| 522 | struct td *td = fhci_remove_td_from_ed(ed); |
| 523 | fhci_urb_complete_free(fhci, td->urb); |
| 524 | } |
| 525 | fhci_recycle_empty_ed(fhci, ed); |
| 526 | ep->hcpriv = NULL; |
| 527 | } |
| 528 | spin_unlock_irqrestore(&fhci->lock, flags); |
| 529 | } |
| 530 | |
| 531 | static int fhci_get_frame_number(struct usb_hcd *hcd) |
| 532 | { |
| 533 | struct fhci_hcd *fhci = hcd_to_fhci(hcd); |
| 534 | |
| 535 | return get_frame_num(fhci); |
| 536 | } |
| 537 | |
| 538 | static const struct hc_driver fhci_driver = { |
| 539 | .description = "fsl,usb-fhci", |
| 540 | .product_desc = "FHCI HOST Controller", |
| 541 | .hcd_priv_size = sizeof(struct fhci_hcd), |
| 542 | |
| 543 | /* generic hardware linkage */ |
| 544 | .irq = fhci_irq, |
| 545 | .flags = HCD_USB11 | HCD_MEMORY, |
| 546 | |
| 547 | /* basic lifecycle operation */ |
| 548 | .start = fhci_start, |
| 549 | .stop = fhci_stop, |
| 550 | |
| 551 | /* managing i/o requests and associated device resources */ |
| 552 | .urb_enqueue = fhci_urb_enqueue, |
| 553 | .urb_dequeue = fhci_urb_dequeue, |
| 554 | .endpoint_disable = fhci_endpoint_disable, |
| 555 | |
| 556 | /* scheduling support */ |
| 557 | .get_frame_number = fhci_get_frame_number, |
| 558 | |
| 559 | /* root hub support */ |
| 560 | .hub_status_data = fhci_hub_status_data, |
| 561 | .hub_control = fhci_hub_control, |
| 562 | }; |
| 563 | |
| 564 | static int __devinit of_fhci_probe(struct of_device *ofdev, |
| 565 | const struct of_device_id *ofid) |
| 566 | { |
| 567 | struct device *dev = &ofdev->dev; |
Grant Likely | 61c7a08 | 2010-04-13 16:12:29 -0700 | [diff] [blame] | 568 | struct device_node *node = dev->of_node; |
Anton Vorontsov | 236dd4d | 2009-01-10 05:03:21 +0300 | [diff] [blame] | 569 | struct usb_hcd *hcd; |
| 570 | struct fhci_hcd *fhci; |
| 571 | struct resource usb_regs; |
| 572 | unsigned long pram_addr; |
| 573 | unsigned int usb_irq; |
| 574 | const char *sprop; |
| 575 | const u32 *iprop; |
| 576 | int size; |
| 577 | int ret; |
| 578 | int i; |
| 579 | int j; |
| 580 | |
| 581 | if (usb_disabled()) |
| 582 | return -ENODEV; |
| 583 | |
| 584 | sprop = of_get_property(node, "mode", NULL); |
| 585 | if (sprop && strcmp(sprop, "host")) |
| 586 | return -ENODEV; |
| 587 | |
Sachin Sant | 6866ac9 | 2009-02-16 19:10:11 +0530 | [diff] [blame] | 588 | hcd = usb_create_hcd(&fhci_driver, dev, dev_name(dev)); |
Anton Vorontsov | 236dd4d | 2009-01-10 05:03:21 +0300 | [diff] [blame] | 589 | if (!hcd) { |
| 590 | dev_err(dev, "could not create hcd\n"); |
| 591 | return -ENOMEM; |
| 592 | } |
| 593 | |
| 594 | fhci = hcd_to_fhci(hcd); |
| 595 | hcd->self.controller = dev; |
| 596 | dev_set_drvdata(dev, hcd); |
| 597 | |
| 598 | iprop = of_get_property(node, "hub-power-budget", &size); |
| 599 | if (iprop && size == sizeof(*iprop)) |
| 600 | hcd->power_budget = *iprop; |
| 601 | |
| 602 | /* FHCI registers. */ |
| 603 | ret = of_address_to_resource(node, 0, &usb_regs); |
| 604 | if (ret) { |
| 605 | dev_err(dev, "could not get regs\n"); |
| 606 | goto err_regs; |
| 607 | } |
| 608 | |
| 609 | hcd->regs = ioremap(usb_regs.start, usb_regs.end - usb_regs.start + 1); |
| 610 | if (!hcd->regs) { |
| 611 | dev_err(dev, "could not ioremap regs\n"); |
| 612 | ret = -ENOMEM; |
| 613 | goto err_regs; |
| 614 | } |
| 615 | fhci->regs = hcd->regs; |
| 616 | |
| 617 | /* Parameter RAM. */ |
| 618 | iprop = of_get_property(node, "reg", &size); |
| 619 | if (!iprop || size < sizeof(*iprop) * 4) { |
| 620 | dev_err(dev, "can't get pram offset\n"); |
| 621 | ret = -EINVAL; |
| 622 | goto err_pram; |
| 623 | } |
| 624 | |
| 625 | pram_addr = cpm_muram_alloc_fixed(iprop[2], FHCI_PRAM_SIZE); |
| 626 | if (IS_ERR_VALUE(pram_addr)) { |
| 627 | dev_err(dev, "failed to allocate usb pram\n"); |
| 628 | ret = -ENOMEM; |
| 629 | goto err_pram; |
| 630 | } |
| 631 | fhci->pram = cpm_muram_addr(pram_addr); |
| 632 | |
| 633 | /* GPIOs and pins */ |
| 634 | for (i = 0; i < NUM_GPIOS; i++) { |
| 635 | int gpio; |
| 636 | enum of_gpio_flags flags; |
| 637 | |
| 638 | gpio = of_get_gpio_flags(node, i, &flags); |
| 639 | fhci->gpios[i] = gpio; |
| 640 | fhci->alow_gpios[i] = flags & OF_GPIO_ACTIVE_LOW; |
| 641 | |
| 642 | if (!gpio_is_valid(gpio)) { |
| 643 | if (i < GPIO_SPEED) { |
| 644 | dev_err(dev, "incorrect GPIO%d: %d\n", |
| 645 | i, gpio); |
| 646 | goto err_gpios; |
| 647 | } else { |
| 648 | dev_info(dev, "assuming board doesn't have " |
| 649 | "%s gpio\n", i == GPIO_SPEED ? |
| 650 | "speed" : "power"); |
| 651 | continue; |
| 652 | } |
| 653 | } |
| 654 | |
Sachin Sant | 6866ac9 | 2009-02-16 19:10:11 +0530 | [diff] [blame] | 655 | ret = gpio_request(gpio, dev_name(dev)); |
Anton Vorontsov | 236dd4d | 2009-01-10 05:03:21 +0300 | [diff] [blame] | 656 | if (ret) { |
| 657 | dev_err(dev, "failed to request gpio %d", i); |
| 658 | goto err_gpios; |
| 659 | } |
| 660 | |
| 661 | if (i >= GPIO_SPEED) { |
| 662 | ret = gpio_direction_output(gpio, 0); |
| 663 | if (ret) { |
| 664 | dev_err(dev, "failed to set gpio %d as " |
| 665 | "an output\n", i); |
| 666 | i++; |
| 667 | goto err_gpios; |
| 668 | } |
| 669 | } |
| 670 | } |
| 671 | |
| 672 | for (j = 0; j < NUM_PINS; j++) { |
Grant Likely | 61c7a08 | 2010-04-13 16:12:29 -0700 | [diff] [blame] | 673 | fhci->pins[j] = qe_pin_request(node, j); |
Anton Vorontsov | 236dd4d | 2009-01-10 05:03:21 +0300 | [diff] [blame] | 674 | if (IS_ERR(fhci->pins[j])) { |
| 675 | ret = PTR_ERR(fhci->pins[j]); |
| 676 | dev_err(dev, "can't get pin %d: %d\n", j, ret); |
| 677 | goto err_pins; |
| 678 | } |
| 679 | } |
| 680 | |
| 681 | /* Frame limit timer and its interrupt. */ |
| 682 | fhci->timer = gtm_get_timer16(); |
| 683 | if (IS_ERR(fhci->timer)) { |
| 684 | ret = PTR_ERR(fhci->timer); |
| 685 | dev_err(dev, "failed to request qe timer: %i", ret); |
| 686 | goto err_get_timer; |
| 687 | } |
| 688 | |
| 689 | ret = request_irq(fhci->timer->irq, fhci_frame_limit_timer_irq, |
| 690 | IRQF_DISABLED, "qe timer (usb)", hcd); |
| 691 | if (ret) { |
| 692 | dev_err(dev, "failed to request timer irq"); |
| 693 | goto err_timer_irq; |
| 694 | } |
| 695 | |
| 696 | /* USB Host interrupt. */ |
| 697 | usb_irq = irq_of_parse_and_map(node, 0); |
| 698 | if (usb_irq == NO_IRQ) { |
| 699 | dev_err(dev, "could not get usb irq\n"); |
| 700 | ret = -EINVAL; |
| 701 | goto err_usb_irq; |
| 702 | } |
| 703 | |
| 704 | /* Clocks. */ |
| 705 | sprop = of_get_property(node, "fsl,fullspeed-clock", NULL); |
| 706 | if (sprop) { |
| 707 | fhci->fullspeed_clk = qe_clock_source(sprop); |
| 708 | if (fhci->fullspeed_clk == QE_CLK_DUMMY) { |
| 709 | dev_err(dev, "wrong fullspeed-clock\n"); |
| 710 | ret = -EINVAL; |
| 711 | goto err_clocks; |
| 712 | } |
| 713 | } |
| 714 | |
| 715 | sprop = of_get_property(node, "fsl,lowspeed-clock", NULL); |
| 716 | if (sprop) { |
| 717 | fhci->lowspeed_clk = qe_clock_source(sprop); |
| 718 | if (fhci->lowspeed_clk == QE_CLK_DUMMY) { |
| 719 | dev_err(dev, "wrong lowspeed-clock\n"); |
| 720 | ret = -EINVAL; |
| 721 | goto err_clocks; |
| 722 | } |
| 723 | } |
| 724 | |
| 725 | if (fhci->fullspeed_clk == QE_CLK_NONE && |
| 726 | fhci->lowspeed_clk == QE_CLK_NONE) { |
| 727 | dev_err(dev, "no clocks specified\n"); |
| 728 | ret = -EINVAL; |
| 729 | goto err_clocks; |
| 730 | } |
| 731 | |
| 732 | dev_info(dev, "at 0x%p, irq %d\n", hcd->regs, usb_irq); |
| 733 | |
| 734 | fhci_config_transceiver(fhci, FHCI_PORT_POWER_OFF); |
| 735 | |
| 736 | /* Start with full-speed, if possible. */ |
| 737 | if (fhci->fullspeed_clk != QE_CLK_NONE) { |
| 738 | fhci_config_transceiver(fhci, FHCI_PORT_FULL); |
| 739 | qe_usb_clock_set(fhci->fullspeed_clk, USB_CLOCK); |
| 740 | } else { |
| 741 | fhci_config_transceiver(fhci, FHCI_PORT_LOW); |
| 742 | qe_usb_clock_set(fhci->lowspeed_clk, USB_CLOCK >> 3); |
| 743 | } |
| 744 | |
| 745 | /* Clear and disable any pending interrupts. */ |
| 746 | out_be16(&fhci->regs->usb_event, 0xffff); |
| 747 | out_be16(&fhci->regs->usb_mask, 0); |
| 748 | |
| 749 | ret = usb_add_hcd(hcd, usb_irq, IRQF_DISABLED); |
| 750 | if (ret < 0) |
| 751 | goto err_add_hcd; |
| 752 | |
| 753 | fhci_dfs_create(fhci); |
| 754 | |
| 755 | return 0; |
| 756 | |
| 757 | err_add_hcd: |
| 758 | err_clocks: |
| 759 | irq_dispose_mapping(usb_irq); |
| 760 | err_usb_irq: |
| 761 | free_irq(fhci->timer->irq, hcd); |
| 762 | err_timer_irq: |
| 763 | gtm_put_timer16(fhci->timer); |
| 764 | err_get_timer: |
| 765 | err_pins: |
| 766 | while (--j >= 0) |
| 767 | qe_pin_free(fhci->pins[j]); |
| 768 | err_gpios: |
| 769 | while (--i >= 0) { |
| 770 | if (gpio_is_valid(fhci->gpios[i])) |
| 771 | gpio_free(fhci->gpios[i]); |
| 772 | } |
| 773 | cpm_muram_free(pram_addr); |
| 774 | err_pram: |
| 775 | iounmap(hcd->regs); |
| 776 | err_regs: |
| 777 | usb_put_hcd(hcd); |
| 778 | return ret; |
| 779 | } |
| 780 | |
| 781 | static int __devexit fhci_remove(struct device *dev) |
| 782 | { |
| 783 | struct usb_hcd *hcd = dev_get_drvdata(dev); |
| 784 | struct fhci_hcd *fhci = hcd_to_fhci(hcd); |
| 785 | int i; |
| 786 | int j; |
| 787 | |
| 788 | usb_remove_hcd(hcd); |
| 789 | free_irq(fhci->timer->irq, hcd); |
| 790 | gtm_put_timer16(fhci->timer); |
| 791 | cpm_muram_free(cpm_muram_offset(fhci->pram)); |
| 792 | for (i = 0; i < NUM_GPIOS; i++) { |
| 793 | if (!gpio_is_valid(fhci->gpios[i])) |
| 794 | continue; |
| 795 | gpio_free(fhci->gpios[i]); |
| 796 | } |
| 797 | for (j = 0; j < NUM_PINS; j++) |
| 798 | qe_pin_free(fhci->pins[j]); |
| 799 | fhci_dfs_destroy(fhci); |
| 800 | usb_put_hcd(hcd); |
| 801 | return 0; |
| 802 | } |
| 803 | |
| 804 | static int __devexit of_fhci_remove(struct of_device *ofdev) |
| 805 | { |
| 806 | return fhci_remove(&ofdev->dev); |
| 807 | } |
| 808 | |
Németh Márton | c4386ad | 2010-01-10 15:35:03 +0100 | [diff] [blame] | 809 | static const struct of_device_id of_fhci_match[] = { |
Anton Vorontsov | 236dd4d | 2009-01-10 05:03:21 +0300 | [diff] [blame] | 810 | { .compatible = "fsl,mpc8323-qe-usb", }, |
| 811 | {}, |
| 812 | }; |
| 813 | MODULE_DEVICE_TABLE(of, of_fhci_match); |
| 814 | |
| 815 | static struct of_platform_driver of_fhci_driver = { |
Grant Likely | 4018294 | 2010-04-13 16:13:02 -0700 | [diff] [blame] | 816 | .driver = { |
| 817 | .name = "fsl,usb-fhci", |
| 818 | .owner = THIS_MODULE, |
| 819 | .of_match_table = of_fhci_match, |
| 820 | }, |
Anton Vorontsov | 236dd4d | 2009-01-10 05:03:21 +0300 | [diff] [blame] | 821 | .probe = of_fhci_probe, |
| 822 | .remove = __devexit_p(of_fhci_remove), |
| 823 | }; |
| 824 | |
| 825 | static int __init fhci_module_init(void) |
| 826 | { |
| 827 | return of_register_platform_driver(&of_fhci_driver); |
| 828 | } |
| 829 | module_init(fhci_module_init); |
| 830 | |
| 831 | static void __exit fhci_module_exit(void) |
| 832 | { |
| 833 | of_unregister_platform_driver(&of_fhci_driver); |
| 834 | } |
| 835 | module_exit(fhci_module_exit); |
| 836 | |
| 837 | MODULE_DESCRIPTION("USB Freescale Host Controller Interface Driver"); |
| 838 | MODULE_AUTHOR("Shlomi Gridish <gridish@freescale.com>, " |
| 839 | "Jerry Huang <Chang-Ming.Huang@freescale.com>, " |
| 840 | "Anton Vorontsov <avorontsov@ru.mvista.com>"); |
| 841 | MODULE_LICENSE("GPL"); |