Tom Rini | 10e4779 | 2018-05-06 17:58:06 -0400 | [diff] [blame] | 1 | // SPDX-License-Identifier: GPL-2.0+ |
Tom Rix | 09c82bc | 2009-10-31 12:37:41 -0500 | [diff] [blame] | 2 | /* |
| 3 | * Copyright (c) 2009 Wind River Systems, Inc. |
| 4 | * Tom Rix <Tom.Rix@windriver.com> |
| 5 | * |
| 6 | * This file is a rewrite of the usb device part of |
| 7 | * repository git.omapzoom.org/repo/u-boot.git, branch master, |
| 8 | * file cpu/omap3/fastboot.c |
| 9 | * |
| 10 | * This is the unique part of its copyright : |
| 11 | * |
| 12 | * ------------------------------------------------------------------------- |
| 13 | * |
| 14 | * (C) Copyright 2008 - 2009 |
| 15 | * Windriver, <www.windriver.com> |
| 16 | * Tom Rix <Tom.Rix@windriver.com> |
| 17 | * |
| 18 | * ------------------------------------------------------------------------- |
| 19 | * |
| 20 | * The details of connecting the device to the uboot usb device subsystem |
| 21 | * came from the old omap3 repository www.sakoman.net/u-boot-omap3.git, |
| 22 | * branch omap3-dev-usb, file drivers/usb/usbdcore_musb.c |
| 23 | * |
| 24 | * This is the unique part of its copyright : |
| 25 | * |
| 26 | * ------------------------------------------------------------------------- |
| 27 | * |
| 28 | * (C) Copyright 2008 Texas Instruments Incorporated. |
| 29 | * |
| 30 | * Based on |
| 31 | * u-boot OMAP1510 USB drivers (drivers/usbdcore_omap1510.c) |
| 32 | * twl4030 init based on linux (drivers/i2c/chips/twl4030_usb.c) |
| 33 | * |
| 34 | * Author: Diego Dompe (diego.dompe@ridgerun.com) |
| 35 | * Atin Malaviya (atin.malaviya@gmail.com) |
| 36 | * |
| 37 | * ------------------------------------------------------------------------- |
Tom Rix | 09c82bc | 2009-10-31 12:37:41 -0500 | [diff] [blame] | 38 | */ |
| 39 | |
| 40 | #include <common.h> |
Simon Glass | f11478f | 2019-12-28 10:45:07 -0700 | [diff] [blame] | 41 | #include <hang.h> |
Simon Glass | bd7a59a | 2019-11-14 12:57:23 -0700 | [diff] [blame] | 42 | #include <serial.h> |
Troy Kisky | df446f5 | 2013-10-10 15:28:04 -0700 | [diff] [blame] | 43 | #include <usbdevice.h> |
Simon Glass | dbd7954 | 2020-05-10 11:40:11 -0600 | [diff] [blame] | 44 | #include <linux/delay.h> |
Troy Kisky | df446f5 | 2013-10-10 15:28:04 -0700 | [diff] [blame] | 45 | #include <usb/udc.h> |
Tom Rix | 09c82bc | 2009-10-31 12:37:41 -0500 | [diff] [blame] | 46 | #include "../gadget/ep0.h" |
| 47 | #include "musb_core.h" |
| 48 | #if defined(CONFIG_USB_OMAP3) |
| 49 | #include "omap3.h" |
Ajay Kumar Gupta | 4e1d485 | 2010-07-09 11:43:48 +0530 | [diff] [blame] | 50 | #elif defined(CONFIG_USB_AM35X) |
| 51 | #include "am35x.h" |
Tom Rix | 09c82bc | 2009-10-31 12:37:41 -0500 | [diff] [blame] | 52 | #endif |
| 53 | |
| 54 | /* Define MUSB_DEBUG for debugging */ |
| 55 | /* #define MUSB_DEBUG */ |
| 56 | #include "musb_debug.h" |
| 57 | |
| 58 | #define MAX_ENDPOINT 15 |
| 59 | |
| 60 | #define GET_ENDPOINT(dev,ep) \ |
| 61 | (((struct usb_device_instance *)(dev))->bus->endpoint_array + ep) |
| 62 | |
| 63 | #define SET_EP0_STATE(s) \ |
| 64 | do { \ |
| 65 | if ((0 <= (s)) && (SET_ADDRESS >= (s))) { \ |
| 66 | if ((s) != ep0_state) { \ |
| 67 | if ((debug_setup) && (debug_level > 1)) \ |
| 68 | serial_printf("INFO : Changing state " \ |
| 69 | "from %s to %s in %s at " \ |
| 70 | "line %d\n", \ |
| 71 | ep0_state_strings[ep0_state],\ |
| 72 | ep0_state_strings[s], \ |
| 73 | __PRETTY_FUNCTION__, \ |
| 74 | __LINE__); \ |
| 75 | ep0_state = s; \ |
| 76 | } \ |
| 77 | } else { \ |
| 78 | if (debug_level > 0) \ |
| 79 | serial_printf("Error at %s %d with setting " \ |
| 80 | "state %d is invalid\n", \ |
| 81 | __PRETTY_FUNCTION__, __LINE__, s); \ |
| 82 | } \ |
| 83 | } while (0) |
| 84 | |
| 85 | /* static implies these initialized to 0 or NULL */ |
| 86 | static int debug_setup; |
| 87 | static int debug_level; |
Heinrich Schuchardt | 773e9e9 | 2017-04-15 14:29:54 +0200 | [diff] [blame] | 88 | static struct musb_epinfo epinfo[MAX_ENDPOINT * 2 + 2]; |
Tom Rix | 09c82bc | 2009-10-31 12:37:41 -0500 | [diff] [blame] | 89 | static enum ep0_state_enum { |
| 90 | IDLE = 0, |
| 91 | TX, |
| 92 | RX, |
| 93 | SET_ADDRESS |
| 94 | } ep0_state = IDLE; |
| 95 | static char *ep0_state_strings[4] = { |
| 96 | "IDLE", |
| 97 | "TX", |
| 98 | "RX", |
| 99 | "SET_ADDRESS", |
| 100 | }; |
| 101 | |
| 102 | static struct urb *ep0_urb; |
| 103 | struct usb_endpoint_instance *ep0_endpoint; |
| 104 | static struct usb_device_instance *udc_device; |
| 105 | static int enabled; |
| 106 | |
Pali Rohár | d0ee6e5 | 2021-02-07 14:50:08 +0100 | [diff] [blame] | 107 | static u16 pending_intrrx; |
| 108 | |
Tom Rix | 09c82bc | 2009-10-31 12:37:41 -0500 | [diff] [blame] | 109 | #ifdef MUSB_DEBUG |
| 110 | static void musb_db_regs(void) |
| 111 | { |
| 112 | u8 b; |
| 113 | u16 w; |
| 114 | |
| 115 | b = readb(&musbr->faddr); |
| 116 | serial_printf("\tfaddr 0x%2.2x\n", b); |
| 117 | |
| 118 | b = readb(&musbr->power); |
| 119 | musb_print_pwr(b); |
| 120 | |
| 121 | w = readw(&musbr->ep[0].ep0.csr0); |
| 122 | musb_print_csr0(w); |
| 123 | |
| 124 | b = readb(&musbr->devctl); |
| 125 | musb_print_devctl(b); |
| 126 | |
| 127 | b = readb(&musbr->ep[0].ep0.configdata); |
| 128 | musb_print_config(b); |
| 129 | |
| 130 | w = readw(&musbr->frame); |
| 131 | serial_printf("\tframe 0x%4.4x\n", w); |
| 132 | |
| 133 | b = readb(&musbr->index); |
| 134 | serial_printf("\tindex 0x%2.2x\n", b); |
| 135 | |
| 136 | w = readw(&musbr->ep[1].epN.rxmaxp); |
| 137 | musb_print_rxmaxp(w); |
| 138 | |
| 139 | w = readw(&musbr->ep[1].epN.rxcsr); |
| 140 | musb_print_rxcsr(w); |
| 141 | |
| 142 | w = readw(&musbr->ep[1].epN.txmaxp); |
| 143 | musb_print_txmaxp(w); |
| 144 | |
| 145 | w = readw(&musbr->ep[1].epN.txcsr); |
| 146 | musb_print_txcsr(w); |
| 147 | } |
| 148 | #else |
| 149 | #define musb_db_regs() |
| 150 | #endif /* DEBUG_MUSB */ |
| 151 | |
| 152 | static void musb_peri_softconnect(void) |
| 153 | { |
| 154 | u8 power, devctl; |
Tom Rix | 09c82bc | 2009-10-31 12:37:41 -0500 | [diff] [blame] | 155 | |
| 156 | /* Power off MUSB */ |
| 157 | power = readb(&musbr->power); |
| 158 | power &= ~MUSB_POWER_SOFTCONN; |
| 159 | writeb(power, &musbr->power); |
| 160 | |
| 161 | /* Read intr to clear */ |
Anatolij Gustschin | 2c5ebfb | 2011-12-03 06:46:10 +0000 | [diff] [blame] | 162 | readb(&musbr->intrusb); |
| 163 | readw(&musbr->intrrx); |
| 164 | readw(&musbr->intrtx); |
Tom Rix | 09c82bc | 2009-10-31 12:37:41 -0500 | [diff] [blame] | 165 | |
| 166 | udelay(1000 * 1000); /* 1 sec */ |
| 167 | |
| 168 | /* Power on MUSB */ |
| 169 | power = readb(&musbr->power); |
| 170 | power |= MUSB_POWER_SOFTCONN; |
| 171 | /* |
| 172 | * The usb device interface is usb 1.1 |
| 173 | * Disable 2.0 high speed by clearring the hsenable bit. |
| 174 | */ |
| 175 | power &= ~MUSB_POWER_HSENAB; |
| 176 | writeb(power, &musbr->power); |
| 177 | |
| 178 | /* Check if device is in b-peripheral mode */ |
| 179 | devctl = readb(&musbr->devctl); |
| 180 | if (!(devctl & MUSB_DEVCTL_BDEVICE) || |
| 181 | (devctl & MUSB_DEVCTL_HM)) { |
| 182 | serial_printf("ERROR : Unsupport USB mode\n"); |
| 183 | serial_printf("Check that mini-B USB cable is attached " |
| 184 | "to the device\n"); |
| 185 | } |
| 186 | |
| 187 | if (debug_setup && (debug_level > 1)) |
| 188 | musb_db_regs(); |
| 189 | } |
| 190 | |
| 191 | static void musb_peri_reset(void) |
| 192 | { |
| 193 | if ((debug_setup) && (debug_level > 1)) |
| 194 | serial_printf("INFO : %s reset\n", __PRETTY_FUNCTION__); |
| 195 | |
| 196 | if (ep0_endpoint) |
| 197 | ep0_endpoint->endpoint_address = 0xff; |
| 198 | |
| 199 | /* Sync sw and hw addresses */ |
| 200 | writeb(udc_device->address, &musbr->faddr); |
| 201 | |
| 202 | SET_EP0_STATE(IDLE); |
| 203 | } |
| 204 | |
| 205 | static void musb_peri_resume(void) |
| 206 | { |
| 207 | /* noop */ |
| 208 | } |
| 209 | |
| 210 | static void musb_peri_ep0_stall(void) |
| 211 | { |
| 212 | u16 csr0; |
| 213 | |
| 214 | csr0 = readw(&musbr->ep[0].ep0.csr0); |
| 215 | csr0 |= MUSB_CSR0_P_SENDSTALL; |
| 216 | writew(csr0, &musbr->ep[0].ep0.csr0); |
| 217 | if ((debug_setup) && (debug_level > 1)) |
| 218 | serial_printf("INFO : %s stall\n", __PRETTY_FUNCTION__); |
| 219 | } |
| 220 | |
| 221 | static void musb_peri_ep0_ack_req(void) |
| 222 | { |
| 223 | u16 csr0; |
| 224 | |
| 225 | csr0 = readw(&musbr->ep[0].ep0.csr0); |
| 226 | csr0 |= MUSB_CSR0_P_SVDRXPKTRDY; |
| 227 | writew(csr0, &musbr->ep[0].ep0.csr0); |
| 228 | } |
| 229 | |
| 230 | static void musb_ep0_tx_ready(void) |
| 231 | { |
| 232 | u16 csr0; |
| 233 | |
| 234 | csr0 = readw(&musbr->ep[0].ep0.csr0); |
| 235 | csr0 |= MUSB_CSR0_TXPKTRDY; |
| 236 | writew(csr0, &musbr->ep[0].ep0.csr0); |
| 237 | } |
| 238 | |
| 239 | static void musb_ep0_tx_ready_and_last(void) |
| 240 | { |
| 241 | u16 csr0; |
| 242 | |
| 243 | csr0 = readw(&musbr->ep[0].ep0.csr0); |
| 244 | csr0 |= (MUSB_CSR0_TXPKTRDY | MUSB_CSR0_P_DATAEND); |
| 245 | writew(csr0, &musbr->ep[0].ep0.csr0); |
| 246 | } |
| 247 | |
| 248 | static void musb_peri_ep0_last(void) |
| 249 | { |
| 250 | u16 csr0; |
| 251 | |
| 252 | csr0 = readw(&musbr->ep[0].ep0.csr0); |
| 253 | csr0 |= MUSB_CSR0_P_DATAEND; |
| 254 | writew(csr0, &musbr->ep[0].ep0.csr0); |
| 255 | } |
| 256 | |
| 257 | static void musb_peri_ep0_set_address(void) |
| 258 | { |
| 259 | u8 faddr; |
| 260 | writeb(udc_device->address, &musbr->faddr); |
| 261 | |
| 262 | /* Verify */ |
| 263 | faddr = readb(&musbr->faddr); |
| 264 | if (udc_device->address == faddr) { |
| 265 | SET_EP0_STATE(IDLE); |
| 266 | usbd_device_event_irq(udc_device, DEVICE_ADDRESS_ASSIGNED, 0); |
| 267 | if ((debug_setup) && (debug_level > 1)) |
| 268 | serial_printf("INFO : %s Address set to %d\n", |
| 269 | __PRETTY_FUNCTION__, udc_device->address); |
| 270 | } else { |
| 271 | if (debug_level > 0) |
| 272 | serial_printf("ERROR : %s Address missmatch " |
| 273 | "sw %d vs hw %d\n", |
| 274 | __PRETTY_FUNCTION__, |
| 275 | udc_device->address, faddr); |
| 276 | } |
| 277 | } |
| 278 | |
| 279 | static void musb_peri_rx_ack(unsigned int ep) |
| 280 | { |
| 281 | u16 peri_rxcsr; |
| 282 | |
| 283 | peri_rxcsr = readw(&musbr->ep[ep].epN.rxcsr); |
| 284 | peri_rxcsr &= ~MUSB_RXCSR_RXPKTRDY; |
| 285 | writew(peri_rxcsr, &musbr->ep[ep].epN.rxcsr); |
| 286 | } |
| 287 | |
| 288 | static void musb_peri_tx_ready(unsigned int ep) |
| 289 | { |
| 290 | u16 peri_txcsr; |
| 291 | |
| 292 | peri_txcsr = readw(&musbr->ep[ep].epN.txcsr); |
| 293 | peri_txcsr |= MUSB_TXCSR_TXPKTRDY; |
| 294 | writew(peri_txcsr, &musbr->ep[ep].epN.txcsr); |
| 295 | } |
| 296 | |
| 297 | static void musb_peri_ep0_zero_data_request(int err) |
| 298 | { |
| 299 | musb_peri_ep0_ack_req(); |
| 300 | |
| 301 | if (err) { |
| 302 | musb_peri_ep0_stall(); |
| 303 | SET_EP0_STATE(IDLE); |
| 304 | } else { |
| 305 | |
| 306 | musb_peri_ep0_last(); |
| 307 | |
| 308 | /* USBD state */ |
| 309 | switch (ep0_urb->device_request.bRequest) { |
| 310 | case USB_REQ_SET_ADDRESS: |
| 311 | if ((debug_setup) && (debug_level > 1)) |
| 312 | serial_printf("INFO : %s received set " |
| 313 | "address\n", __PRETTY_FUNCTION__); |
| 314 | break; |
| 315 | |
| 316 | case USB_REQ_SET_CONFIGURATION: |
| 317 | if ((debug_setup) && (debug_level > 1)) |
| 318 | serial_printf("INFO : %s Configured\n", |
| 319 | __PRETTY_FUNCTION__); |
| 320 | usbd_device_event_irq(udc_device, DEVICE_CONFIGURED, 0); |
| 321 | break; |
| 322 | } |
| 323 | |
| 324 | /* EP0 state */ |
| 325 | if (USB_REQ_SET_ADDRESS == ep0_urb->device_request.bRequest) { |
| 326 | SET_EP0_STATE(SET_ADDRESS); |
| 327 | } else { |
| 328 | SET_EP0_STATE(IDLE); |
| 329 | } |
| 330 | } |
| 331 | } |
| 332 | |
| 333 | static void musb_peri_ep0_rx_data_request(void) |
| 334 | { |
| 335 | /* |
| 336 | * This is the completion of the data OUT / RX |
| 337 | * |
| 338 | * Host is sending data to ep0 that is not |
| 339 | * part of setup. This comes from the cdc_recv_setup |
| 340 | * op that is device specific. |
| 341 | * |
| 342 | */ |
| 343 | musb_peri_ep0_ack_req(); |
| 344 | |
| 345 | ep0_endpoint->rcv_urb = ep0_urb; |
| 346 | ep0_urb->actual_length = 0; |
| 347 | SET_EP0_STATE(RX); |
| 348 | } |
| 349 | |
| 350 | static void musb_peri_ep0_tx_data_request(int err) |
| 351 | { |
| 352 | if (err) { |
| 353 | musb_peri_ep0_stall(); |
| 354 | SET_EP0_STATE(IDLE); |
| 355 | } else { |
| 356 | musb_peri_ep0_ack_req(); |
| 357 | |
| 358 | ep0_endpoint->tx_urb = ep0_urb; |
| 359 | ep0_endpoint->sent = 0; |
| 360 | SET_EP0_STATE(TX); |
| 361 | } |
| 362 | } |
| 363 | |
| 364 | static void musb_peri_ep0_idle(void) |
| 365 | { |
| 366 | u16 count0; |
| 367 | int err; |
| 368 | u16 csr0; |
| 369 | |
| 370 | /* |
| 371 | * Verify addresses |
| 372 | * A lot of confusion can be caused if the address |
| 373 | * in software, udc layer, does not agree with the |
| 374 | * hardware. Since the setting of the hardware address |
| 375 | * must be set after the set address request, the |
| 376 | * usb state machine is out of sync for a few frame. |
| 377 | * It is a good idea to run this check when changes |
| 378 | * are made to the state machine. |
| 379 | */ |
| 380 | if ((debug_level > 0) && |
| 381 | (ep0_state != SET_ADDRESS)) { |
| 382 | u8 faddr; |
| 383 | |
| 384 | faddr = readb(&musbr->faddr); |
| 385 | if (udc_device->address != faddr) { |
| 386 | serial_printf("ERROR : %s addresses do not" |
| 387 | "match sw %d vs hw %d\n", |
| 388 | __PRETTY_FUNCTION__, |
| 389 | udc_device->address, faddr); |
| 390 | udelay(1000 * 1000); |
| 391 | hang(); |
| 392 | } |
| 393 | } |
| 394 | |
| 395 | csr0 = readw(&musbr->ep[0].ep0.csr0); |
| 396 | |
| 397 | if (!(MUSB_CSR0_RXPKTRDY & csr0)) |
| 398 | goto end; |
| 399 | |
| 400 | count0 = readw(&musbr->ep[0].ep0.count0); |
| 401 | if (count0 == 0) |
| 402 | goto end; |
| 403 | |
| 404 | if (count0 != 8) { |
| 405 | if ((debug_setup) && (debug_level > 1)) |
| 406 | serial_printf("WARN : %s SETUP incorrect size %d\n", |
| 407 | __PRETTY_FUNCTION__, count0); |
| 408 | musb_peri_ep0_stall(); |
| 409 | goto end; |
| 410 | } |
| 411 | |
| 412 | read_fifo(0, count0, &ep0_urb->device_request); |
| 413 | |
| 414 | if (debug_level > 2) |
| 415 | print_usb_device_request(&ep0_urb->device_request); |
| 416 | |
| 417 | if (ep0_urb->device_request.wLength == 0) { |
| 418 | err = ep0_recv_setup(ep0_urb); |
| 419 | |
| 420 | /* Zero data request */ |
| 421 | musb_peri_ep0_zero_data_request(err); |
| 422 | } else { |
| 423 | /* Is data coming or going ? */ |
| 424 | u8 reqType = ep0_urb->device_request.bmRequestType; |
| 425 | |
| 426 | if (USB_REQ_DEVICE2HOST == (reqType & USB_REQ_DIRECTION_MASK)) { |
| 427 | err = ep0_recv_setup(ep0_urb); |
| 428 | /* Device to host */ |
| 429 | musb_peri_ep0_tx_data_request(err); |
| 430 | } else { |
| 431 | /* |
| 432 | * Host to device |
| 433 | * |
| 434 | * The RX routine will call ep0_recv_setup |
| 435 | * when the data packet has arrived. |
| 436 | */ |
| 437 | musb_peri_ep0_rx_data_request(); |
| 438 | } |
| 439 | } |
| 440 | |
| 441 | end: |
| 442 | return; |
| 443 | } |
| 444 | |
| 445 | static void musb_peri_ep0_rx(void) |
| 446 | { |
| 447 | /* |
| 448 | * This is the completion of the data OUT / RX |
| 449 | * |
| 450 | * Host is sending data to ep0 that is not |
| 451 | * part of setup. This comes from the cdc_recv_setup |
| 452 | * op that is device specific. |
| 453 | * |
| 454 | * Pass the data back to driver ep0_recv_setup which |
| 455 | * should give the cdc_recv_setup the chance to handle |
| 456 | * the rx |
| 457 | */ |
| 458 | u16 csr0; |
| 459 | u16 count0; |
| 460 | |
| 461 | if (debug_level > 3) { |
| 462 | if (0 != ep0_urb->actual_length) { |
| 463 | serial_printf("%s finished ? %d of %d\n", |
| 464 | __PRETTY_FUNCTION__, |
| 465 | ep0_urb->actual_length, |
| 466 | ep0_urb->device_request.wLength); |
| 467 | } |
| 468 | } |
| 469 | |
| 470 | if (ep0_urb->device_request.wLength == ep0_urb->actual_length) { |
| 471 | musb_peri_ep0_last(); |
| 472 | SET_EP0_STATE(IDLE); |
| 473 | ep0_recv_setup(ep0_urb); |
| 474 | return; |
| 475 | } |
| 476 | |
| 477 | csr0 = readw(&musbr->ep[0].ep0.csr0); |
| 478 | if (!(MUSB_CSR0_RXPKTRDY & csr0)) |
| 479 | return; |
| 480 | |
| 481 | count0 = readw(&musbr->ep[0].ep0.count0); |
| 482 | |
| 483 | if (count0) { |
| 484 | struct usb_endpoint_instance *endpoint; |
| 485 | u32 length; |
| 486 | u8 *data; |
| 487 | |
| 488 | endpoint = ep0_endpoint; |
| 489 | if (endpoint && endpoint->rcv_urb) { |
| 490 | struct urb *urb = endpoint->rcv_urb; |
| 491 | unsigned int remaining_space = urb->buffer_length - |
| 492 | urb->actual_length; |
| 493 | |
| 494 | if (remaining_space) { |
| 495 | int urb_bad = 0; /* urb is good */ |
| 496 | |
| 497 | if (count0 > remaining_space) |
| 498 | length = remaining_space; |
| 499 | else |
| 500 | length = count0; |
| 501 | |
| 502 | data = (u8 *) urb->buffer_data; |
| 503 | data += urb->actual_length; |
| 504 | |
| 505 | /* The common musb fifo reader */ |
| 506 | read_fifo(0, length, data); |
| 507 | |
| 508 | musb_peri_ep0_ack_req(); |
| 509 | |
| 510 | /* |
| 511 | * urb's actual_length is updated in |
| 512 | * usbd_rcv_complete |
| 513 | */ |
| 514 | usbd_rcv_complete(endpoint, length, urb_bad); |
| 515 | |
| 516 | } else { |
| 517 | if (debug_level > 0) |
| 518 | serial_printf("ERROR : %s no space in " |
| 519 | "rcv buffer\n", |
| 520 | __PRETTY_FUNCTION__); |
| 521 | } |
| 522 | } else { |
| 523 | if (debug_level > 0) |
| 524 | serial_printf("ERROR : %s problem with " |
| 525 | "endpoint\n", |
| 526 | __PRETTY_FUNCTION__); |
| 527 | } |
| 528 | } else { |
| 529 | if (debug_level > 0) |
| 530 | serial_printf("ERROR : %s with nothing to do\n", |
| 531 | __PRETTY_FUNCTION__); |
| 532 | } |
| 533 | } |
| 534 | |
| 535 | static void musb_peri_ep0_tx(void) |
| 536 | { |
| 537 | u16 csr0; |
| 538 | int transfer_size = 0; |
| 539 | unsigned int p, pm; |
| 540 | |
| 541 | csr0 = readw(&musbr->ep[0].ep0.csr0); |
| 542 | |
| 543 | /* Check for pending tx */ |
| 544 | if (csr0 & MUSB_CSR0_TXPKTRDY) |
| 545 | goto end; |
| 546 | |
| 547 | /* Check if this is the last packet sent */ |
| 548 | if (ep0_endpoint->sent >= ep0_urb->actual_length) { |
| 549 | SET_EP0_STATE(IDLE); |
| 550 | goto end; |
| 551 | } |
| 552 | |
| 553 | transfer_size = ep0_urb->actual_length - ep0_endpoint->sent; |
| 554 | /* Is the transfer size negative ? */ |
| 555 | if (transfer_size <= 0) { |
| 556 | if (debug_level > 0) |
| 557 | serial_printf("ERROR : %s problem with the" |
| 558 | " transfer size %d\n", |
| 559 | __PRETTY_FUNCTION__, |
| 560 | transfer_size); |
| 561 | SET_EP0_STATE(IDLE); |
| 562 | goto end; |
| 563 | } |
| 564 | |
| 565 | /* Truncate large transfers to the fifo size */ |
| 566 | if (transfer_size > ep0_endpoint->tx_packetSize) |
| 567 | transfer_size = ep0_endpoint->tx_packetSize; |
| 568 | |
| 569 | write_fifo(0, transfer_size, &ep0_urb->buffer[ep0_endpoint->sent]); |
| 570 | ep0_endpoint->sent += transfer_size; |
| 571 | |
| 572 | /* Done or more to send ? */ |
| 573 | if (ep0_endpoint->sent >= ep0_urb->actual_length) |
| 574 | musb_ep0_tx_ready_and_last(); |
| 575 | else |
| 576 | musb_ep0_tx_ready(); |
| 577 | |
| 578 | /* Wait a bit */ |
| 579 | pm = 10; |
| 580 | for (p = 0; p < pm; p++) { |
| 581 | csr0 = readw(&musbr->ep[0].ep0.csr0); |
| 582 | if (!(csr0 & MUSB_CSR0_TXPKTRDY)) |
| 583 | break; |
| 584 | |
| 585 | /* Double the delay. */ |
| 586 | udelay(1 << pm); |
| 587 | } |
| 588 | |
| 589 | if ((ep0_endpoint->sent >= ep0_urb->actual_length) && (p < pm)) |
| 590 | SET_EP0_STATE(IDLE); |
| 591 | |
| 592 | end: |
| 593 | return; |
| 594 | } |
| 595 | |
| 596 | static void musb_peri_ep0(void) |
| 597 | { |
| 598 | u16 csr0; |
| 599 | |
| 600 | if (SET_ADDRESS == ep0_state) |
| 601 | return; |
| 602 | |
| 603 | csr0 = readw(&musbr->ep[0].ep0.csr0); |
| 604 | |
| 605 | /* Error conditions */ |
| 606 | if (MUSB_CSR0_P_SENTSTALL & csr0) { |
| 607 | csr0 &= ~MUSB_CSR0_P_SENTSTALL; |
| 608 | writew(csr0, &musbr->ep[0].ep0.csr0); |
| 609 | SET_EP0_STATE(IDLE); |
| 610 | } |
| 611 | if (MUSB_CSR0_P_SETUPEND & csr0) { |
| 612 | csr0 |= MUSB_CSR0_P_SVDSETUPEND; |
| 613 | writew(csr0, &musbr->ep[0].ep0.csr0); |
| 614 | SET_EP0_STATE(IDLE); |
| 615 | if ((debug_setup) && (debug_level > 1)) |
| 616 | serial_printf("WARN: %s SETUPEND\n", |
| 617 | __PRETTY_FUNCTION__); |
| 618 | } |
| 619 | |
| 620 | /* Normal states */ |
| 621 | if (IDLE == ep0_state) |
| 622 | musb_peri_ep0_idle(); |
| 623 | |
| 624 | if (TX == ep0_state) |
| 625 | musb_peri_ep0_tx(); |
| 626 | |
| 627 | if (RX == ep0_state) |
| 628 | musb_peri_ep0_rx(); |
| 629 | } |
| 630 | |
| 631 | static void musb_peri_rx_ep(unsigned int ep) |
| 632 | { |
Pankaj Bharadiya | 025e375 | 2012-09-13 09:38:16 +0000 | [diff] [blame] | 633 | u16 peri_rxcount; |
Pali Rohár | 980d36d | 2021-02-07 14:50:06 +0100 | [diff] [blame] | 634 | u16 peri_rxcsr = readw(&musbr->ep[ep].epN.rxcsr); |
Pankaj Bharadiya | 025e375 | 2012-09-13 09:38:16 +0000 | [diff] [blame] | 635 | |
| 636 | if (!(peri_rxcsr & MUSB_RXCSR_RXPKTRDY)) { |
| 637 | if (debug_level > 0) |
| 638 | serial_printf("ERROR : %s %d without MUSB_RXCSR_RXPKTRDY set\n", |
| 639 | __PRETTY_FUNCTION__, ep); |
| 640 | return; |
| 641 | } |
Tom Rix | 09c82bc | 2009-10-31 12:37:41 -0500 | [diff] [blame] | 642 | |
Pankaj Bharadiya | 025e375 | 2012-09-13 09:38:16 +0000 | [diff] [blame] | 643 | peri_rxcount = readw(&musbr->ep[ep].epN.rxcount); |
Tom Rix | 09c82bc | 2009-10-31 12:37:41 -0500 | [diff] [blame] | 644 | if (peri_rxcount) { |
| 645 | struct usb_endpoint_instance *endpoint; |
| 646 | u32 length; |
| 647 | u8 *data; |
| 648 | |
| 649 | endpoint = GET_ENDPOINT(udc_device, ep); |
| 650 | if (endpoint && endpoint->rcv_urb) { |
| 651 | struct urb *urb = endpoint->rcv_urb; |
| 652 | unsigned int remaining_space = urb->buffer_length - |
| 653 | urb->actual_length; |
| 654 | |
| 655 | if (remaining_space) { |
| 656 | int urb_bad = 0; /* urb is good */ |
| 657 | |
| 658 | if (peri_rxcount > remaining_space) |
| 659 | length = remaining_space; |
| 660 | else |
| 661 | length = peri_rxcount; |
| 662 | |
| 663 | data = (u8 *) urb->buffer_data; |
| 664 | data += urb->actual_length; |
| 665 | |
| 666 | /* The common musb fifo reader */ |
| 667 | read_fifo(ep, length, data); |
| 668 | |
Pali Rohár | d0ee6e5 | 2021-02-07 14:50:08 +0100 | [diff] [blame] | 669 | if (length == peri_rxcount) |
| 670 | musb_peri_rx_ack(ep); |
| 671 | else |
| 672 | pending_intrrx |= (1 << ep); |
Tom Rix | 09c82bc | 2009-10-31 12:37:41 -0500 | [diff] [blame] | 673 | |
| 674 | /* |
| 675 | * urb's actual_length is updated in |
| 676 | * usbd_rcv_complete |
| 677 | */ |
| 678 | usbd_rcv_complete(endpoint, length, urb_bad); |
| 679 | |
| 680 | } else { |
| 681 | if (debug_level > 0) |
| 682 | serial_printf("ERROR : %s %d no space " |
| 683 | "in rcv buffer\n", |
| 684 | __PRETTY_FUNCTION__, ep); |
Pali Rohár | d0ee6e5 | 2021-02-07 14:50:08 +0100 | [diff] [blame] | 685 | |
| 686 | pending_intrrx |= (1 << ep); |
Tom Rix | 09c82bc | 2009-10-31 12:37:41 -0500 | [diff] [blame] | 687 | } |
| 688 | } else { |
| 689 | if (debug_level > 0) |
| 690 | serial_printf("ERROR : %s %d problem with " |
| 691 | "endpoint\n", |
| 692 | __PRETTY_FUNCTION__, ep); |
Pali Rohár | d0ee6e5 | 2021-02-07 14:50:08 +0100 | [diff] [blame] | 693 | |
| 694 | pending_intrrx |= (1 << ep); |
Tom Rix | 09c82bc | 2009-10-31 12:37:41 -0500 | [diff] [blame] | 695 | } |
| 696 | |
| 697 | } else { |
| 698 | if (debug_level > 0) |
| 699 | serial_printf("ERROR : %s %d with nothing to do\n", |
| 700 | __PRETTY_FUNCTION__, ep); |
Pali Rohár | d0ee6e5 | 2021-02-07 14:50:08 +0100 | [diff] [blame] | 701 | |
| 702 | musb_peri_rx_ack(ep); |
Tom Rix | 09c82bc | 2009-10-31 12:37:41 -0500 | [diff] [blame] | 703 | } |
| 704 | } |
| 705 | |
| 706 | static void musb_peri_rx(u16 intr) |
| 707 | { |
| 708 | unsigned int ep; |
| 709 | |
Pali Rohár | 067be3e | 2021-02-07 14:50:09 +0100 | [diff] [blame] | 710 | /* First bit is reserved and does not indicate interrupt for EP0 */ |
Tom Rix | 09c82bc | 2009-10-31 12:37:41 -0500 | [diff] [blame] | 711 | |
| 712 | for (ep = 1; ep < 16; ep++) { |
| 713 | if ((1 << ep) & intr) |
| 714 | musb_peri_rx_ep(ep); |
| 715 | } |
| 716 | } |
| 717 | |
| 718 | static void musb_peri_tx(u16 intr) |
| 719 | { |
Pali Rohár | 4540aae | 2021-02-07 14:50:07 +0100 | [diff] [blame] | 720 | unsigned int ep; |
| 721 | |
Pali Rohár | 067be3e | 2021-02-07 14:50:09 +0100 | [diff] [blame] | 722 | /* Check for EP0: first bit indicates interrupt for both RX and TX */ |
Tom Rix | 09c82bc | 2009-10-31 12:37:41 -0500 | [diff] [blame] | 723 | if (0x01 & intr) |
Pali Rohár | 067be3e | 2021-02-07 14:50:09 +0100 | [diff] [blame] | 724 | musb_peri_ep0(); |
Tom Rix | 09c82bc | 2009-10-31 12:37:41 -0500 | [diff] [blame] | 725 | |
Pali Rohár | 4540aae | 2021-02-07 14:50:07 +0100 | [diff] [blame] | 726 | for (ep = 1; ep < 16; ep++) { |
| 727 | if ((1 << ep) & intr) |
| 728 | udc_endpoint_write(GET_ENDPOINT(udc_device, ep)); |
| 729 | } |
Tom Rix | 09c82bc | 2009-10-31 12:37:41 -0500 | [diff] [blame] | 730 | } |
| 731 | |
| 732 | void udc_irq(void) |
| 733 | { |
| 734 | /* This is a high freq called function */ |
| 735 | if (enabled) { |
| 736 | u8 intrusb; |
| 737 | |
| 738 | intrusb = readb(&musbr->intrusb); |
| 739 | |
| 740 | /* |
| 741 | * See drivers/usb/gadget/mpc8xx_udc.c for |
| 742 | * state diagram going from detached through |
| 743 | * configuration. |
| 744 | */ |
| 745 | if (MUSB_INTR_RESUME & intrusb) { |
| 746 | usbd_device_event_irq(udc_device, |
| 747 | DEVICE_BUS_ACTIVITY, 0); |
| 748 | musb_peri_resume(); |
| 749 | } |
| 750 | |
Tom Rix | 09c82bc | 2009-10-31 12:37:41 -0500 | [diff] [blame] | 751 | if (MUSB_INTR_RESET & intrusb) { |
| 752 | usbd_device_event_irq(udc_device, DEVICE_RESET, 0); |
| 753 | musb_peri_reset(); |
| 754 | } |
| 755 | |
| 756 | if (MUSB_INTR_DISCONNECT & intrusb) { |
| 757 | /* cable unplugged from hub/host */ |
| 758 | usbd_device_event_irq(udc_device, DEVICE_RESET, 0); |
| 759 | musb_peri_reset(); |
| 760 | usbd_device_event_irq(udc_device, DEVICE_HUB_RESET, 0); |
| 761 | } |
| 762 | |
| 763 | if (MUSB_INTR_SOF & intrusb) { |
| 764 | usbd_device_event_irq(udc_device, |
| 765 | DEVICE_BUS_ACTIVITY, 0); |
| 766 | musb_peri_resume(); |
| 767 | } |
| 768 | |
| 769 | if (MUSB_INTR_SUSPEND & intrusb) { |
| 770 | usbd_device_event_irq(udc_device, |
| 771 | DEVICE_BUS_INACTIVE, 0); |
| 772 | } |
| 773 | |
| 774 | if (ep0_state != SET_ADDRESS) { |
| 775 | u16 intrrx, intrtx; |
| 776 | |
| 777 | intrrx = readw(&musbr->intrrx); |
| 778 | intrtx = readw(&musbr->intrtx); |
| 779 | |
Pali Rohár | d0ee6e5 | 2021-02-07 14:50:08 +0100 | [diff] [blame] | 780 | intrrx |= pending_intrrx; |
| 781 | pending_intrrx = 0; |
| 782 | |
Tom Rix | 09c82bc | 2009-10-31 12:37:41 -0500 | [diff] [blame] | 783 | if (intrrx) |
| 784 | musb_peri_rx(intrrx); |
| 785 | |
| 786 | if (intrtx) |
| 787 | musb_peri_tx(intrtx); |
| 788 | } else { |
Pali Rohár | 067be3e | 2021-02-07 14:50:09 +0100 | [diff] [blame] | 789 | if (readw(&musbr->intrtx) & 0x1) { |
Tom Rix | 09c82bc | 2009-10-31 12:37:41 -0500 | [diff] [blame] | 790 | u8 faddr; |
| 791 | faddr = readb(&musbr->faddr); |
| 792 | /* |
| 793 | * Setting of the address can fail. |
| 794 | * Normally it succeeds the second time. |
| 795 | */ |
| 796 | if (udc_device->address != faddr) |
| 797 | musb_peri_ep0_set_address(); |
| 798 | } |
| 799 | } |
| 800 | } |
| 801 | } |
| 802 | |
| 803 | void udc_set_nak(int ep_num) |
| 804 | { |
| 805 | /* noop */ |
| 806 | } |
| 807 | |
| 808 | void udc_unset_nak(int ep_num) |
| 809 | { |
| 810 | /* noop */ |
| 811 | } |
| 812 | |
| 813 | int udc_endpoint_write(struct usb_endpoint_instance *endpoint) |
| 814 | { |
| 815 | int ret = 0; |
| 816 | |
| 817 | /* Transmit only if the hardware is available */ |
| 818 | if (endpoint->tx_urb && endpoint->state == 0) { |
| 819 | unsigned int ep = endpoint->endpoint_address & |
| 820 | USB_ENDPOINT_NUMBER_MASK; |
| 821 | |
| 822 | u16 peri_txcsr = readw(&musbr->ep[ep].epN.txcsr); |
| 823 | |
| 824 | /* Error conditions */ |
| 825 | if (peri_txcsr & MUSB_TXCSR_P_UNDERRUN) { |
| 826 | peri_txcsr &= ~MUSB_TXCSR_P_UNDERRUN; |
| 827 | writew(peri_txcsr, &musbr->ep[ep].epN.txcsr); |
| 828 | } |
| 829 | |
| 830 | if (debug_level > 1) |
| 831 | musb_print_txcsr(peri_txcsr); |
| 832 | |
| 833 | /* Check if a packet is waiting to be sent */ |
| 834 | if (!(peri_txcsr & MUSB_TXCSR_TXPKTRDY)) { |
| 835 | u32 length; |
| 836 | u8 *data; |
| 837 | struct urb *urb = endpoint->tx_urb; |
| 838 | unsigned int remaining_packet = urb->actual_length - |
| 839 | endpoint->sent; |
| 840 | |
| 841 | if (endpoint->tx_packetSize < remaining_packet) |
| 842 | length = endpoint->tx_packetSize; |
| 843 | else |
| 844 | length = remaining_packet; |
| 845 | |
| 846 | data = (u8 *) urb->buffer; |
| 847 | data += endpoint->sent; |
| 848 | |
| 849 | /* common musb fifo function */ |
| 850 | write_fifo(ep, length, data); |
| 851 | |
| 852 | musb_peri_tx_ready(ep); |
| 853 | |
| 854 | endpoint->last = length; |
| 855 | /* usbd_tx_complete will take care of updating 'sent' */ |
| 856 | usbd_tx_complete(endpoint); |
| 857 | } |
| 858 | } else { |
| 859 | if (debug_level > 0) |
| 860 | serial_printf("ERROR : %s Problem with urb %p " |
| 861 | "or ep state %d\n", |
| 862 | __PRETTY_FUNCTION__, |
| 863 | endpoint->tx_urb, endpoint->state); |
| 864 | } |
| 865 | |
| 866 | return ret; |
| 867 | } |
| 868 | |
| 869 | void udc_setup_ep(struct usb_device_instance *device, unsigned int id, |
| 870 | struct usb_endpoint_instance *endpoint) |
| 871 | { |
| 872 | if (0 == id) { |
| 873 | /* EP0 */ |
| 874 | ep0_endpoint = endpoint; |
| 875 | ep0_endpoint->endpoint_address = 0xff; |
| 876 | ep0_urb = usbd_alloc_urb(device, endpoint); |
| 877 | } else if (MAX_ENDPOINT >= id) { |
Pali Rohár | 858df84 | 2021-02-07 14:50:10 +0100 | [diff] [blame] | 878 | epinfo[(id * 2) + 0].epsize = endpoint->rcv_packetSize; |
| 879 | epinfo[(id * 2) + 1].epsize = endpoint->tx_packetSize; |
Axel Lin | d6272f2 | 2013-06-23 00:57:46 +0800 | [diff] [blame] | 880 | musb_configure_ep(&epinfo[0], ARRAY_SIZE(epinfo)); |
Tom Rix | 09c82bc | 2009-10-31 12:37:41 -0500 | [diff] [blame] | 881 | } else { |
| 882 | if (debug_level > 0) |
| 883 | serial_printf("ERROR : %s endpoint request %d " |
| 884 | "exceeds maximum %d\n", |
| 885 | __PRETTY_FUNCTION__, id, MAX_ENDPOINT); |
| 886 | } |
| 887 | } |
| 888 | |
| 889 | void udc_connect(void) |
| 890 | { |
| 891 | /* noop */ |
| 892 | } |
| 893 | |
| 894 | void udc_disconnect(void) |
| 895 | { |
| 896 | /* noop */ |
| 897 | } |
| 898 | |
| 899 | void udc_enable(struct usb_device_instance *device) |
| 900 | { |
| 901 | /* Save the device structure pointer */ |
| 902 | udc_device = device; |
| 903 | |
| 904 | enabled = 1; |
| 905 | } |
| 906 | |
| 907 | void udc_disable(void) |
| 908 | { |
| 909 | enabled = 0; |
| 910 | } |
| 911 | |
| 912 | void udc_startup_events(struct usb_device_instance *device) |
| 913 | { |
| 914 | /* The DEVICE_INIT event puts the USB device in the state STATE_INIT. */ |
| 915 | usbd_device_event_irq(device, DEVICE_INIT, 0); |
| 916 | |
| 917 | /* |
| 918 | * The DEVICE_CREATE event puts the USB device in the state |
| 919 | * STATE_ATTACHED. |
| 920 | */ |
| 921 | usbd_device_event_irq(device, DEVICE_CREATE, 0); |
| 922 | |
| 923 | /* Resets the address to 0 */ |
| 924 | usbd_device_event_irq(device, DEVICE_RESET, 0); |
| 925 | |
| 926 | udc_enable(device); |
| 927 | } |
| 928 | |
| 929 | int udc_init(void) |
| 930 | { |
| 931 | int ret; |
| 932 | int ep_loop; |
| 933 | |
| 934 | ret = musb_platform_init(); |
| 935 | if (ret < 0) |
| 936 | goto end; |
| 937 | |
| 938 | /* Configure all the endpoint FIFO's and start usb controller */ |
| 939 | musbr = musb_cfg.regs; |
| 940 | |
| 941 | /* Initialize the endpoints */ |
Heinrich Schuchardt | 773e9e9 | 2017-04-15 14:29:54 +0200 | [diff] [blame] | 942 | for (ep_loop = 0; ep_loop <= MAX_ENDPOINT * 2; ep_loop++) { |
Tom Rix | 09c82bc | 2009-10-31 12:37:41 -0500 | [diff] [blame] | 943 | epinfo[ep_loop].epnum = (ep_loop / 2) + 1; |
| 944 | epinfo[ep_loop].epdir = ep_loop % 2; /* OUT, IN */ |
| 945 | epinfo[ep_loop].epsize = 0; |
| 946 | } |
| 947 | |
| 948 | musb_peri_softconnect(); |
| 949 | |
| 950 | ret = 0; |
| 951 | end: |
| 952 | |
| 953 | return ret; |
| 954 | } |