| 1 | /* |
| 2 | * Renesas USB driver |
| 3 | * |
| 4 | * Copyright (C) 2011 Renesas Solutions Corp. |
| 5 | * Kuninori Morimoto <kuninori.morimoto.gx@renesas.com> |
| 6 | * |
| 7 | * This program is distributed in the hope that it will be useful, |
| 8 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 9 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 10 | * GNU General Public License for more details. |
| 11 | * |
| 12 | * You should have received a copy of the GNU General Public License |
| 13 | * along with this program; if not, write to the Free Software |
| 14 | * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA |
| 15 | * |
| 16 | */ |
| 17 | #include <linux/delay.h> |
| 18 | #include <linux/io.h> |
| 19 | #include <linux/scatterlist.h> |
| 20 | #include "common.h" |
| 21 | #include "pipe.h" |
| 22 | |
| 23 | #define usbhsf_get_cfifo(p) (&((p)->fifo_info.cfifo)) |
| 24 | #define usbhsf_get_d0fifo(p) (&((p)->fifo_info.d0fifo)) |
| 25 | #define usbhsf_get_d1fifo(p) (&((p)->fifo_info.d1fifo)) |
| 26 | #define usbhsf_is_cfifo(p, f) (usbhsf_get_cfifo(p) == f) |
| 27 | |
| 28 | #define usbhsf_fifo_is_busy(f) ((f)->pipe) /* see usbhs_pipe_select_fifo */ |
| 29 | |
| 30 | /* |
| 31 | * packet initialize |
| 32 | */ |
| 33 | void usbhs_pkt_init(struct usbhs_pkt *pkt) |
| 34 | { |
| 35 | INIT_LIST_HEAD(&pkt->node); |
| 36 | } |
| 37 | |
| 38 | /* |
| 39 | * packet control function |
| 40 | */ |
| 41 | static int usbhsf_null_handle(struct usbhs_pkt *pkt, int *is_done) |
| 42 | { |
| 43 | struct usbhs_priv *priv = usbhs_pipe_to_priv(pkt->pipe); |
| 44 | struct device *dev = usbhs_priv_to_dev(priv); |
| 45 | |
| 46 | dev_err(dev, "null handler\n"); |
| 47 | |
| 48 | return -EINVAL; |
| 49 | } |
| 50 | |
| 51 | static struct usbhs_pkt_handle usbhsf_null_handler = { |
| 52 | .prepare = usbhsf_null_handle, |
| 53 | .try_run = usbhsf_null_handle, |
| 54 | }; |
| 55 | |
| 56 | void usbhs_pkt_push(struct usbhs_pipe *pipe, struct usbhs_pkt *pkt, |
| 57 | void (*done)(struct usbhs_priv *priv, |
| 58 | struct usbhs_pkt *pkt), |
| 59 | void *buf, int len, int zero, int sequence) |
| 60 | { |
| 61 | struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe); |
| 62 | struct device *dev = usbhs_priv_to_dev(priv); |
| 63 | unsigned long flags; |
| 64 | |
| 65 | if (!done) { |
| 66 | dev_err(dev, "no done function\n"); |
| 67 | return; |
| 68 | } |
| 69 | |
| 70 | /******************** spin lock ********************/ |
| 71 | usbhs_lock(priv, flags); |
| 72 | |
| 73 | if (!pipe->handler) { |
| 74 | dev_err(dev, "no handler function\n"); |
| 75 | pipe->handler = &usbhsf_null_handler; |
| 76 | } |
| 77 | |
| 78 | list_move_tail(&pkt->node, &pipe->list); |
| 79 | |
| 80 | /* |
| 81 | * each pkt must hold own handler. |
| 82 | * because handler might be changed by its situation. |
| 83 | * dma handler -> pio handler. |
| 84 | */ |
| 85 | pkt->pipe = pipe; |
| 86 | pkt->buf = buf; |
| 87 | pkt->handler = pipe->handler; |
| 88 | pkt->length = len; |
| 89 | pkt->zero = zero; |
| 90 | pkt->actual = 0; |
| 91 | pkt->done = done; |
| 92 | pkt->sequence = sequence; |
| 93 | |
| 94 | usbhs_unlock(priv, flags); |
| 95 | /******************** spin unlock ******************/ |
| 96 | } |
| 97 | |
| 98 | static void __usbhsf_pkt_del(struct usbhs_pkt *pkt) |
| 99 | { |
| 100 | list_del_init(&pkt->node); |
| 101 | } |
| 102 | |
| 103 | static struct usbhs_pkt *__usbhsf_pkt_get(struct usbhs_pipe *pipe) |
| 104 | { |
| 105 | if (list_empty(&pipe->list)) |
| 106 | return NULL; |
| 107 | |
| 108 | return list_first_entry(&pipe->list, struct usbhs_pkt, node); |
| 109 | } |
| 110 | |
| 111 | struct usbhs_pkt *usbhs_pkt_pop(struct usbhs_pipe *pipe, struct usbhs_pkt *pkt) |
| 112 | { |
| 113 | struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe); |
| 114 | unsigned long flags; |
| 115 | |
| 116 | /******************** spin lock ********************/ |
| 117 | usbhs_lock(priv, flags); |
| 118 | |
| 119 | if (!pkt) |
| 120 | pkt = __usbhsf_pkt_get(pipe); |
| 121 | |
| 122 | if (pkt) |
| 123 | __usbhsf_pkt_del(pkt); |
| 124 | |
| 125 | usbhs_unlock(priv, flags); |
| 126 | /******************** spin unlock ******************/ |
| 127 | |
| 128 | return pkt; |
| 129 | } |
| 130 | |
| 131 | enum { |
| 132 | USBHSF_PKT_PREPARE, |
| 133 | USBHSF_PKT_TRY_RUN, |
| 134 | USBHSF_PKT_DMA_DONE, |
| 135 | }; |
| 136 | |
| 137 | static int usbhsf_pkt_handler(struct usbhs_pipe *pipe, int type) |
| 138 | { |
| 139 | struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe); |
| 140 | struct usbhs_pkt *pkt; |
| 141 | struct device *dev = usbhs_priv_to_dev(priv); |
| 142 | int (*func)(struct usbhs_pkt *pkt, int *is_done); |
| 143 | unsigned long flags; |
| 144 | int ret = 0; |
| 145 | int is_done = 0; |
| 146 | |
| 147 | /******************** spin lock ********************/ |
| 148 | usbhs_lock(priv, flags); |
| 149 | |
| 150 | pkt = __usbhsf_pkt_get(pipe); |
| 151 | if (!pkt) |
| 152 | goto __usbhs_pkt_handler_end; |
| 153 | |
| 154 | switch (type) { |
| 155 | case USBHSF_PKT_PREPARE: |
| 156 | func = pkt->handler->prepare; |
| 157 | break; |
| 158 | case USBHSF_PKT_TRY_RUN: |
| 159 | func = pkt->handler->try_run; |
| 160 | break; |
| 161 | case USBHSF_PKT_DMA_DONE: |
| 162 | func = pkt->handler->dma_done; |
| 163 | break; |
| 164 | default: |
| 165 | dev_err(dev, "unknown pkt handler\n"); |
| 166 | goto __usbhs_pkt_handler_end; |
| 167 | } |
| 168 | |
| 169 | if (likely(func)) |
| 170 | ret = func(pkt, &is_done); |
| 171 | |
| 172 | if (is_done) |
| 173 | __usbhsf_pkt_del(pkt); |
| 174 | |
| 175 | __usbhs_pkt_handler_end: |
| 176 | usbhs_unlock(priv, flags); |
| 177 | /******************** spin unlock ******************/ |
| 178 | |
| 179 | if (is_done) { |
| 180 | pkt->done(priv, pkt); |
| 181 | usbhs_pkt_start(pipe); |
| 182 | } |
| 183 | |
| 184 | return ret; |
| 185 | } |
| 186 | |
| 187 | void usbhs_pkt_start(struct usbhs_pipe *pipe) |
| 188 | { |
| 189 | usbhsf_pkt_handler(pipe, USBHSF_PKT_PREPARE); |
| 190 | } |
| 191 | |
| 192 | /* |
| 193 | * irq enable/disable function |
| 194 | */ |
| 195 | #define usbhsf_irq_empty_ctrl(p, e) usbhsf_irq_callback_ctrl(p, irq_bempsts, e) |
| 196 | #define usbhsf_irq_ready_ctrl(p, e) usbhsf_irq_callback_ctrl(p, irq_brdysts, e) |
| 197 | #define usbhsf_irq_callback_ctrl(pipe, status, enable) \ |
| 198 | ({ \ |
| 199 | struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe); \ |
| 200 | struct usbhs_mod *mod = usbhs_mod_get_current(priv); \ |
| 201 | u16 status = (1 << usbhs_pipe_number(pipe)); \ |
| 202 | if (!mod) \ |
| 203 | return; \ |
| 204 | if (enable) \ |
| 205 | mod->status |= status; \ |
| 206 | else \ |
| 207 | mod->status &= ~status; \ |
| 208 | usbhs_irq_callback_update(priv, mod); \ |
| 209 | }) |
| 210 | |
| 211 | static void usbhsf_tx_irq_ctrl(struct usbhs_pipe *pipe, int enable) |
| 212 | { |
| 213 | /* |
| 214 | * And DCP pipe can NOT use "ready interrupt" for "send" |
| 215 | * it should use "empty" interrupt. |
| 216 | * see |
| 217 | * "Operation" - "Interrupt Function" - "BRDY Interrupt" |
| 218 | * |
| 219 | * on the other hand, normal pipe can use "ready interrupt" for "send" |
| 220 | * even though it is single/double buffer |
| 221 | */ |
| 222 | if (usbhs_pipe_is_dcp(pipe)) |
| 223 | usbhsf_irq_empty_ctrl(pipe, enable); |
| 224 | else |
| 225 | usbhsf_irq_ready_ctrl(pipe, enable); |
| 226 | } |
| 227 | |
| 228 | static void usbhsf_rx_irq_ctrl(struct usbhs_pipe *pipe, int enable) |
| 229 | { |
| 230 | usbhsf_irq_ready_ctrl(pipe, enable); |
| 231 | } |
| 232 | |
| 233 | /* |
| 234 | * FIFO ctrl |
| 235 | */ |
| 236 | static void usbhsf_send_terminator(struct usbhs_pipe *pipe, |
| 237 | struct usbhs_fifo *fifo) |
| 238 | { |
| 239 | struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe); |
| 240 | |
| 241 | usbhs_bset(priv, fifo->ctr, BVAL, BVAL); |
| 242 | } |
| 243 | |
| 244 | static int usbhsf_fifo_barrier(struct usbhs_priv *priv, |
| 245 | struct usbhs_fifo *fifo) |
| 246 | { |
| 247 | int timeout = 1024; |
| 248 | |
| 249 | do { |
| 250 | /* The FIFO port is accessible */ |
| 251 | if (usbhs_read(priv, fifo->ctr) & FRDY) |
| 252 | return 0; |
| 253 | |
| 254 | udelay(10); |
| 255 | } while (timeout--); |
| 256 | |
| 257 | return -EBUSY; |
| 258 | } |
| 259 | |
| 260 | static void usbhsf_fifo_clear(struct usbhs_pipe *pipe, |
| 261 | struct usbhs_fifo *fifo) |
| 262 | { |
| 263 | struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe); |
| 264 | int ret = 0; |
| 265 | |
| 266 | if (!usbhs_pipe_is_dcp(pipe)) { |
| 267 | /* |
| 268 | * This driver checks the pipe condition first to avoid -EBUSY |
| 269 | * from usbhsf_fifo_barrier() with about 10 msec delay in |
| 270 | * the interrupt handler if the pipe is RX direction and empty. |
| 271 | */ |
| 272 | if (usbhs_pipe_is_dir_in(pipe)) |
| 273 | ret = usbhs_pipe_is_accessible(pipe); |
| 274 | if (!ret) |
| 275 | ret = usbhsf_fifo_barrier(priv, fifo); |
| 276 | } |
| 277 | |
| 278 | /* |
| 279 | * if non-DCP pipe, this driver should set BCLR when |
| 280 | * usbhsf_fifo_barrier() returns 0. |
| 281 | */ |
| 282 | if (!ret) |
| 283 | usbhs_write(priv, fifo->ctr, BCLR); |
| 284 | } |
| 285 | |
| 286 | static int usbhsf_fifo_rcv_len(struct usbhs_priv *priv, |
| 287 | struct usbhs_fifo *fifo) |
| 288 | { |
| 289 | return usbhs_read(priv, fifo->ctr) & DTLN_MASK; |
| 290 | } |
| 291 | |
| 292 | static void usbhsf_fifo_unselect(struct usbhs_pipe *pipe, |
| 293 | struct usbhs_fifo *fifo) |
| 294 | { |
| 295 | struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe); |
| 296 | |
| 297 | usbhs_pipe_select_fifo(pipe, NULL); |
| 298 | usbhs_write(priv, fifo->sel, 0); |
| 299 | } |
| 300 | |
| 301 | static int usbhsf_fifo_select(struct usbhs_pipe *pipe, |
| 302 | struct usbhs_fifo *fifo, |
| 303 | int write) |
| 304 | { |
| 305 | struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe); |
| 306 | struct device *dev = usbhs_priv_to_dev(priv); |
| 307 | int timeout = 1024; |
| 308 | u16 mask = ((1 << 5) | 0xF); /* mask of ISEL | CURPIPE */ |
| 309 | u16 base = usbhs_pipe_number(pipe); /* CURPIPE */ |
| 310 | |
| 311 | if (usbhs_pipe_is_busy(pipe) || |
| 312 | usbhsf_fifo_is_busy(fifo)) |
| 313 | return -EBUSY; |
| 314 | |
| 315 | if (usbhs_pipe_is_dcp(pipe)) { |
| 316 | base |= (1 == write) << 5; /* ISEL */ |
| 317 | |
| 318 | if (usbhs_mod_is_host(priv)) |
| 319 | usbhs_dcp_dir_for_host(pipe, write); |
| 320 | } |
| 321 | |
| 322 | /* "base" will be used below */ |
| 323 | if (usbhs_get_dparam(priv, has_sudmac) && !usbhsf_is_cfifo(priv, fifo)) |
| 324 | usbhs_write(priv, fifo->sel, base); |
| 325 | else |
| 326 | usbhs_write(priv, fifo->sel, base | MBW_32); |
| 327 | |
| 328 | /* check ISEL and CURPIPE value */ |
| 329 | while (timeout--) { |
| 330 | if (base == (mask & usbhs_read(priv, fifo->sel))) { |
| 331 | usbhs_pipe_select_fifo(pipe, fifo); |
| 332 | return 0; |
| 333 | } |
| 334 | udelay(10); |
| 335 | } |
| 336 | |
| 337 | dev_err(dev, "fifo select error\n"); |
| 338 | |
| 339 | return -EIO; |
| 340 | } |
| 341 | |
| 342 | /* |
| 343 | * DCP status stage |
| 344 | */ |
| 345 | static int usbhs_dcp_dir_switch_to_write(struct usbhs_pkt *pkt, int *is_done) |
| 346 | { |
| 347 | struct usbhs_pipe *pipe = pkt->pipe; |
| 348 | struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe); |
| 349 | struct usbhs_fifo *fifo = usbhsf_get_cfifo(priv); /* CFIFO */ |
| 350 | struct device *dev = usbhs_priv_to_dev(priv); |
| 351 | int ret; |
| 352 | |
| 353 | usbhs_pipe_disable(pipe); |
| 354 | |
| 355 | ret = usbhsf_fifo_select(pipe, fifo, 1); |
| 356 | if (ret < 0) { |
| 357 | dev_err(dev, "%s() faile\n", __func__); |
| 358 | return ret; |
| 359 | } |
| 360 | |
| 361 | usbhs_pipe_sequence_data1(pipe); /* DATA1 */ |
| 362 | |
| 363 | usbhsf_fifo_clear(pipe, fifo); |
| 364 | usbhsf_send_terminator(pipe, fifo); |
| 365 | |
| 366 | usbhsf_fifo_unselect(pipe, fifo); |
| 367 | |
| 368 | usbhsf_tx_irq_ctrl(pipe, 1); |
| 369 | usbhs_pipe_enable(pipe); |
| 370 | |
| 371 | return ret; |
| 372 | } |
| 373 | |
| 374 | static int usbhs_dcp_dir_switch_to_read(struct usbhs_pkt *pkt, int *is_done) |
| 375 | { |
| 376 | struct usbhs_pipe *pipe = pkt->pipe; |
| 377 | struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe); |
| 378 | struct usbhs_fifo *fifo = usbhsf_get_cfifo(priv); /* CFIFO */ |
| 379 | struct device *dev = usbhs_priv_to_dev(priv); |
| 380 | int ret; |
| 381 | |
| 382 | usbhs_pipe_disable(pipe); |
| 383 | |
| 384 | ret = usbhsf_fifo_select(pipe, fifo, 0); |
| 385 | if (ret < 0) { |
| 386 | dev_err(dev, "%s() fail\n", __func__); |
| 387 | return ret; |
| 388 | } |
| 389 | |
| 390 | usbhs_pipe_sequence_data1(pipe); /* DATA1 */ |
| 391 | usbhsf_fifo_clear(pipe, fifo); |
| 392 | |
| 393 | usbhsf_fifo_unselect(pipe, fifo); |
| 394 | |
| 395 | usbhsf_rx_irq_ctrl(pipe, 1); |
| 396 | usbhs_pipe_enable(pipe); |
| 397 | |
| 398 | return ret; |
| 399 | |
| 400 | } |
| 401 | |
| 402 | static int usbhs_dcp_dir_switch_done(struct usbhs_pkt *pkt, int *is_done) |
| 403 | { |
| 404 | struct usbhs_pipe *pipe = pkt->pipe; |
| 405 | |
| 406 | if (pkt->handler == &usbhs_dcp_status_stage_in_handler) |
| 407 | usbhsf_tx_irq_ctrl(pipe, 0); |
| 408 | else |
| 409 | usbhsf_rx_irq_ctrl(pipe, 0); |
| 410 | |
| 411 | pkt->actual = pkt->length; |
| 412 | *is_done = 1; |
| 413 | |
| 414 | return 0; |
| 415 | } |
| 416 | |
| 417 | struct usbhs_pkt_handle usbhs_dcp_status_stage_in_handler = { |
| 418 | .prepare = usbhs_dcp_dir_switch_to_write, |
| 419 | .try_run = usbhs_dcp_dir_switch_done, |
| 420 | }; |
| 421 | |
| 422 | struct usbhs_pkt_handle usbhs_dcp_status_stage_out_handler = { |
| 423 | .prepare = usbhs_dcp_dir_switch_to_read, |
| 424 | .try_run = usbhs_dcp_dir_switch_done, |
| 425 | }; |
| 426 | |
| 427 | /* |
| 428 | * DCP data stage (push) |
| 429 | */ |
| 430 | static int usbhsf_dcp_data_stage_try_push(struct usbhs_pkt *pkt, int *is_done) |
| 431 | { |
| 432 | struct usbhs_pipe *pipe = pkt->pipe; |
| 433 | |
| 434 | usbhs_pipe_sequence_data1(pipe); /* DATA1 */ |
| 435 | |
| 436 | /* |
| 437 | * change handler to PIO push |
| 438 | */ |
| 439 | pkt->handler = &usbhs_fifo_pio_push_handler; |
| 440 | |
| 441 | return pkt->handler->prepare(pkt, is_done); |
| 442 | } |
| 443 | |
| 444 | struct usbhs_pkt_handle usbhs_dcp_data_stage_out_handler = { |
| 445 | .prepare = usbhsf_dcp_data_stage_try_push, |
| 446 | }; |
| 447 | |
| 448 | /* |
| 449 | * DCP data stage (pop) |
| 450 | */ |
| 451 | static int usbhsf_dcp_data_stage_prepare_pop(struct usbhs_pkt *pkt, |
| 452 | int *is_done) |
| 453 | { |
| 454 | struct usbhs_pipe *pipe = pkt->pipe; |
| 455 | struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe); |
| 456 | struct usbhs_fifo *fifo = usbhsf_get_cfifo(priv); |
| 457 | |
| 458 | if (usbhs_pipe_is_busy(pipe)) |
| 459 | return 0; |
| 460 | |
| 461 | /* |
| 462 | * prepare pop for DCP should |
| 463 | * - change DCP direction, |
| 464 | * - clear fifo |
| 465 | * - DATA1 |
| 466 | */ |
| 467 | usbhs_pipe_disable(pipe); |
| 468 | |
| 469 | usbhs_pipe_sequence_data1(pipe); /* DATA1 */ |
| 470 | |
| 471 | usbhsf_fifo_select(pipe, fifo, 0); |
| 472 | usbhsf_fifo_clear(pipe, fifo); |
| 473 | usbhsf_fifo_unselect(pipe, fifo); |
| 474 | |
| 475 | /* |
| 476 | * change handler to PIO pop |
| 477 | */ |
| 478 | pkt->handler = &usbhs_fifo_pio_pop_handler; |
| 479 | |
| 480 | return pkt->handler->prepare(pkt, is_done); |
| 481 | } |
| 482 | |
| 483 | struct usbhs_pkt_handle usbhs_dcp_data_stage_in_handler = { |
| 484 | .prepare = usbhsf_dcp_data_stage_prepare_pop, |
| 485 | }; |
| 486 | |
| 487 | /* |
| 488 | * PIO push handler |
| 489 | */ |
| 490 | static int usbhsf_pio_try_push(struct usbhs_pkt *pkt, int *is_done) |
| 491 | { |
| 492 | struct usbhs_pipe *pipe = pkt->pipe; |
| 493 | struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe); |
| 494 | struct device *dev = usbhs_priv_to_dev(priv); |
| 495 | struct usbhs_fifo *fifo = usbhsf_get_cfifo(priv); /* CFIFO */ |
| 496 | void __iomem *addr = priv->base + fifo->port; |
| 497 | u8 *buf; |
| 498 | int maxp = usbhs_pipe_get_maxpacket(pipe); |
| 499 | int total_len; |
| 500 | int i, ret, len; |
| 501 | int is_short; |
| 502 | |
| 503 | usbhs_pipe_data_sequence(pipe, pkt->sequence); |
| 504 | pkt->sequence = -1; /* -1 sequence will be ignored */ |
| 505 | |
| 506 | usbhs_pipe_set_trans_count_if_bulk(pipe, pkt->length); |
| 507 | |
| 508 | ret = usbhsf_fifo_select(pipe, fifo, 1); |
| 509 | if (ret < 0) |
| 510 | return 0; |
| 511 | |
| 512 | ret = usbhs_pipe_is_accessible(pipe); |
| 513 | if (ret < 0) { |
| 514 | /* inaccessible pipe is not an error */ |
| 515 | ret = 0; |
| 516 | goto usbhs_fifo_write_busy; |
| 517 | } |
| 518 | |
| 519 | ret = usbhsf_fifo_barrier(priv, fifo); |
| 520 | if (ret < 0) |
| 521 | goto usbhs_fifo_write_busy; |
| 522 | |
| 523 | buf = pkt->buf + pkt->actual; |
| 524 | len = pkt->length - pkt->actual; |
| 525 | len = min(len, maxp); |
| 526 | total_len = len; |
| 527 | is_short = total_len < maxp; |
| 528 | |
| 529 | /* |
| 530 | * FIXME |
| 531 | * |
| 532 | * 32-bit access only |
| 533 | */ |
| 534 | if (len >= 4 && !((unsigned long)buf & 0x03)) { |
| 535 | iowrite32_rep(addr, buf, len / 4); |
| 536 | len %= 4; |
| 537 | buf += total_len - len; |
| 538 | } |
| 539 | |
| 540 | /* the rest operation */ |
| 541 | for (i = 0; i < len; i++) |
| 542 | iowrite8(buf[i], addr + (0x03 - (i & 0x03))); |
| 543 | |
| 544 | /* |
| 545 | * variable update |
| 546 | */ |
| 547 | pkt->actual += total_len; |
| 548 | |
| 549 | if (pkt->actual < pkt->length) |
| 550 | *is_done = 0; /* there are remainder data */ |
| 551 | else if (is_short) |
| 552 | *is_done = 1; /* short packet */ |
| 553 | else |
| 554 | *is_done = !pkt->zero; /* send zero packet ? */ |
| 555 | |
| 556 | /* |
| 557 | * pipe/irq handling |
| 558 | */ |
| 559 | if (is_short) |
| 560 | usbhsf_send_terminator(pipe, fifo); |
| 561 | |
| 562 | usbhsf_tx_irq_ctrl(pipe, !*is_done); |
| 563 | usbhs_pipe_running(pipe, !*is_done); |
| 564 | usbhs_pipe_enable(pipe); |
| 565 | |
| 566 | dev_dbg(dev, " send %d (%d/ %d/ %d/ %d)\n", |
| 567 | usbhs_pipe_number(pipe), |
| 568 | pkt->length, pkt->actual, *is_done, pkt->zero); |
| 569 | |
| 570 | /* |
| 571 | * Transmission end |
| 572 | */ |
| 573 | if (*is_done) { |
| 574 | if (usbhs_pipe_is_dcp(pipe)) |
| 575 | usbhs_dcp_control_transfer_done(pipe); |
| 576 | } |
| 577 | |
| 578 | usbhsf_fifo_unselect(pipe, fifo); |
| 579 | |
| 580 | return 0; |
| 581 | |
| 582 | usbhs_fifo_write_busy: |
| 583 | usbhsf_fifo_unselect(pipe, fifo); |
| 584 | |
| 585 | /* |
| 586 | * pipe is busy. |
| 587 | * retry in interrupt |
| 588 | */ |
| 589 | usbhsf_tx_irq_ctrl(pipe, 1); |
| 590 | usbhs_pipe_running(pipe, 1); |
| 591 | |
| 592 | return ret; |
| 593 | } |
| 594 | |
| 595 | static int usbhsf_pio_prepare_push(struct usbhs_pkt *pkt, int *is_done) |
| 596 | { |
| 597 | if (usbhs_pipe_is_running(pkt->pipe)) |
| 598 | return 0; |
| 599 | |
| 600 | return usbhsf_pio_try_push(pkt, is_done); |
| 601 | } |
| 602 | |
| 603 | struct usbhs_pkt_handle usbhs_fifo_pio_push_handler = { |
| 604 | .prepare = usbhsf_pio_prepare_push, |
| 605 | .try_run = usbhsf_pio_try_push, |
| 606 | }; |
| 607 | |
| 608 | /* |
| 609 | * PIO pop handler |
| 610 | */ |
| 611 | static int usbhsf_prepare_pop(struct usbhs_pkt *pkt, int *is_done) |
| 612 | { |
| 613 | struct usbhs_pipe *pipe = pkt->pipe; |
| 614 | |
| 615 | if (usbhs_pipe_is_busy(pipe)) |
| 616 | return 0; |
| 617 | |
| 618 | if (usbhs_pipe_is_running(pipe)) |
| 619 | return 0; |
| 620 | |
| 621 | /* |
| 622 | * pipe enable to prepare packet receive |
| 623 | */ |
| 624 | usbhs_pipe_data_sequence(pipe, pkt->sequence); |
| 625 | pkt->sequence = -1; /* -1 sequence will be ignored */ |
| 626 | |
| 627 | usbhs_pipe_set_trans_count_if_bulk(pipe, pkt->length); |
| 628 | usbhs_pipe_enable(pipe); |
| 629 | usbhs_pipe_running(pipe, 1); |
| 630 | usbhsf_rx_irq_ctrl(pipe, 1); |
| 631 | |
| 632 | return 0; |
| 633 | } |
| 634 | |
| 635 | static int usbhsf_pio_try_pop(struct usbhs_pkt *pkt, int *is_done) |
| 636 | { |
| 637 | struct usbhs_pipe *pipe = pkt->pipe; |
| 638 | struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe); |
| 639 | struct device *dev = usbhs_priv_to_dev(priv); |
| 640 | struct usbhs_fifo *fifo = usbhsf_get_cfifo(priv); /* CFIFO */ |
| 641 | void __iomem *addr = priv->base + fifo->port; |
| 642 | u8 *buf; |
| 643 | u32 data = 0; |
| 644 | int maxp = usbhs_pipe_get_maxpacket(pipe); |
| 645 | int rcv_len, len; |
| 646 | int i, ret; |
| 647 | int total_len = 0; |
| 648 | |
| 649 | ret = usbhsf_fifo_select(pipe, fifo, 0); |
| 650 | if (ret < 0) |
| 651 | return 0; |
| 652 | |
| 653 | ret = usbhsf_fifo_barrier(priv, fifo); |
| 654 | if (ret < 0) |
| 655 | goto usbhs_fifo_read_busy; |
| 656 | |
| 657 | rcv_len = usbhsf_fifo_rcv_len(priv, fifo); |
| 658 | |
| 659 | buf = pkt->buf + pkt->actual; |
| 660 | len = pkt->length - pkt->actual; |
| 661 | len = min(len, rcv_len); |
| 662 | total_len = len; |
| 663 | |
| 664 | /* |
| 665 | * update actual length first here to decide disable pipe. |
| 666 | * if this pipe keeps BUF status and all data were popped, |
| 667 | * then, next interrupt/token will be issued again |
| 668 | */ |
| 669 | pkt->actual += total_len; |
| 670 | |
| 671 | if ((pkt->actual == pkt->length) || /* receive all data */ |
| 672 | (total_len < maxp)) { /* short packet */ |
| 673 | *is_done = 1; |
| 674 | usbhsf_rx_irq_ctrl(pipe, 0); |
| 675 | usbhs_pipe_running(pipe, 0); |
| 676 | usbhs_pipe_disable(pipe); /* disable pipe first */ |
| 677 | } |
| 678 | |
| 679 | /* |
| 680 | * Buffer clear if Zero-Length packet |
| 681 | * |
| 682 | * see |
| 683 | * "Operation" - "FIFO Buffer Memory" - "FIFO Port Function" |
| 684 | */ |
| 685 | if (0 == rcv_len) { |
| 686 | pkt->zero = 1; |
| 687 | usbhsf_fifo_clear(pipe, fifo); |
| 688 | goto usbhs_fifo_read_end; |
| 689 | } |
| 690 | |
| 691 | /* |
| 692 | * FIXME |
| 693 | * |
| 694 | * 32-bit access only |
| 695 | */ |
| 696 | if (len >= 4 && !((unsigned long)buf & 0x03)) { |
| 697 | ioread32_rep(addr, buf, len / 4); |
| 698 | len %= 4; |
| 699 | buf += total_len - len; |
| 700 | } |
| 701 | |
| 702 | /* the rest operation */ |
| 703 | for (i = 0; i < len; i++) { |
| 704 | if (!(i & 0x03)) |
| 705 | data = ioread32(addr); |
| 706 | |
| 707 | buf[i] = (data >> ((i & 0x03) * 8)) & 0xff; |
| 708 | } |
| 709 | |
| 710 | usbhs_fifo_read_end: |
| 711 | dev_dbg(dev, " recv %d (%d/ %d/ %d/ %d)\n", |
| 712 | usbhs_pipe_number(pipe), |
| 713 | pkt->length, pkt->actual, *is_done, pkt->zero); |
| 714 | |
| 715 | usbhs_fifo_read_busy: |
| 716 | usbhsf_fifo_unselect(pipe, fifo); |
| 717 | |
| 718 | return ret; |
| 719 | } |
| 720 | |
| 721 | struct usbhs_pkt_handle usbhs_fifo_pio_pop_handler = { |
| 722 | .prepare = usbhsf_prepare_pop, |
| 723 | .try_run = usbhsf_pio_try_pop, |
| 724 | }; |
| 725 | |
| 726 | /* |
| 727 | * DCP ctrol statge handler |
| 728 | */ |
| 729 | static int usbhsf_ctrl_stage_end(struct usbhs_pkt *pkt, int *is_done) |
| 730 | { |
| 731 | usbhs_dcp_control_transfer_done(pkt->pipe); |
| 732 | |
| 733 | *is_done = 1; |
| 734 | |
| 735 | return 0; |
| 736 | } |
| 737 | |
| 738 | struct usbhs_pkt_handle usbhs_ctrl_stage_end_handler = { |
| 739 | .prepare = usbhsf_ctrl_stage_end, |
| 740 | .try_run = usbhsf_ctrl_stage_end, |
| 741 | }; |
| 742 | |
| 743 | /* |
| 744 | * DMA fifo functions |
| 745 | */ |
| 746 | static struct dma_chan *usbhsf_dma_chan_get(struct usbhs_fifo *fifo, |
| 747 | struct usbhs_pkt *pkt) |
| 748 | { |
| 749 | if (&usbhs_fifo_dma_push_handler == pkt->handler) |
| 750 | return fifo->tx_chan; |
| 751 | |
| 752 | if (&usbhs_fifo_dma_pop_handler == pkt->handler) |
| 753 | return fifo->rx_chan; |
| 754 | |
| 755 | return NULL; |
| 756 | } |
| 757 | |
| 758 | static struct usbhs_fifo *usbhsf_get_dma_fifo(struct usbhs_priv *priv, |
| 759 | struct usbhs_pkt *pkt) |
| 760 | { |
| 761 | struct usbhs_fifo *fifo; |
| 762 | |
| 763 | /* DMA :: D0FIFO */ |
| 764 | fifo = usbhsf_get_d0fifo(priv); |
| 765 | if (usbhsf_dma_chan_get(fifo, pkt) && |
| 766 | !usbhsf_fifo_is_busy(fifo)) |
| 767 | return fifo; |
| 768 | |
| 769 | /* DMA :: D1FIFO */ |
| 770 | fifo = usbhsf_get_d1fifo(priv); |
| 771 | if (usbhsf_dma_chan_get(fifo, pkt) && |
| 772 | !usbhsf_fifo_is_busy(fifo)) |
| 773 | return fifo; |
| 774 | |
| 775 | return NULL; |
| 776 | } |
| 777 | |
| 778 | #define usbhsf_dma_start(p, f) __usbhsf_dma_ctrl(p, f, DREQE) |
| 779 | #define usbhsf_dma_stop(p, f) __usbhsf_dma_ctrl(p, f, 0) |
| 780 | static void __usbhsf_dma_ctrl(struct usbhs_pipe *pipe, |
| 781 | struct usbhs_fifo *fifo, |
| 782 | u16 dreqe) |
| 783 | { |
| 784 | struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe); |
| 785 | |
| 786 | usbhs_bset(priv, fifo->sel, DREQE, dreqe); |
| 787 | } |
| 788 | |
| 789 | #define usbhsf_dma_map(p) __usbhsf_dma_map_ctrl(p, 1) |
| 790 | #define usbhsf_dma_unmap(p) __usbhsf_dma_map_ctrl(p, 0) |
| 791 | static int __usbhsf_dma_map_ctrl(struct usbhs_pkt *pkt, int map) |
| 792 | { |
| 793 | struct usbhs_pipe *pipe = pkt->pipe; |
| 794 | struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe); |
| 795 | struct usbhs_pipe_info *info = usbhs_priv_to_pipeinfo(priv); |
| 796 | |
| 797 | return info->dma_map_ctrl(pkt, map); |
| 798 | } |
| 799 | |
| 800 | static void usbhsf_dma_complete(void *arg); |
| 801 | static void xfer_work(struct work_struct *work) |
| 802 | { |
| 803 | struct usbhs_pkt *pkt = container_of(work, struct usbhs_pkt, work); |
| 804 | struct usbhs_pipe *pipe = pkt->pipe; |
| 805 | struct usbhs_fifo *fifo = usbhs_pipe_to_fifo(pipe); |
| 806 | struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe); |
| 807 | struct dma_async_tx_descriptor *desc; |
| 808 | struct dma_chan *chan = usbhsf_dma_chan_get(fifo, pkt); |
| 809 | struct device *dev = usbhs_priv_to_dev(priv); |
| 810 | enum dma_transfer_direction dir; |
| 811 | |
| 812 | dir = usbhs_pipe_is_dir_in(pipe) ? DMA_DEV_TO_MEM : DMA_MEM_TO_DEV; |
| 813 | |
| 814 | desc = dmaengine_prep_slave_single(chan, pkt->dma + pkt->actual, |
| 815 | pkt->trans, dir, |
| 816 | DMA_PREP_INTERRUPT | DMA_CTRL_ACK); |
| 817 | if (!desc) |
| 818 | return; |
| 819 | |
| 820 | desc->callback = usbhsf_dma_complete; |
| 821 | desc->callback_param = pipe; |
| 822 | |
| 823 | if (dmaengine_submit(desc) < 0) { |
| 824 | dev_err(dev, "Failed to submit dma descriptor\n"); |
| 825 | return; |
| 826 | } |
| 827 | |
| 828 | dev_dbg(dev, " %s %d (%d/ %d)\n", |
| 829 | fifo->name, usbhs_pipe_number(pipe), pkt->length, pkt->zero); |
| 830 | |
| 831 | usbhs_pipe_running(pipe, 1); |
| 832 | usbhs_pipe_set_trans_count_if_bulk(pipe, pkt->trans); |
| 833 | dma_async_issue_pending(chan); |
| 834 | usbhsf_dma_start(pipe, fifo); |
| 835 | usbhs_pipe_enable(pipe); |
| 836 | } |
| 837 | |
| 838 | /* |
| 839 | * DMA push handler |
| 840 | */ |
| 841 | static int usbhsf_dma_prepare_push(struct usbhs_pkt *pkt, int *is_done) |
| 842 | { |
| 843 | struct usbhs_pipe *pipe = pkt->pipe; |
| 844 | struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe); |
| 845 | struct usbhs_fifo *fifo; |
| 846 | int len = pkt->length - pkt->actual; |
| 847 | int ret; |
| 848 | |
| 849 | if (usbhs_pipe_is_busy(pipe)) |
| 850 | return 0; |
| 851 | |
| 852 | /* use PIO if packet is less than pio_dma_border or pipe is DCP */ |
| 853 | if ((len < usbhs_get_dparam(priv, pio_dma_border)) || |
| 854 | usbhs_pipe_is_dcp(pipe)) |
| 855 | goto usbhsf_pio_prepare_push; |
| 856 | |
| 857 | if (len & 0x7) /* 8byte alignment */ |
| 858 | goto usbhsf_pio_prepare_push; |
| 859 | |
| 860 | if ((uintptr_t)(pkt->buf + pkt->actual) & 0x7) /* 8byte alignment */ |
| 861 | goto usbhsf_pio_prepare_push; |
| 862 | |
| 863 | /* return at this time if the pipe is running */ |
| 864 | if (usbhs_pipe_is_running(pipe)) |
| 865 | return 0; |
| 866 | |
| 867 | /* get enable DMA fifo */ |
| 868 | fifo = usbhsf_get_dma_fifo(priv, pkt); |
| 869 | if (!fifo) |
| 870 | goto usbhsf_pio_prepare_push; |
| 871 | |
| 872 | if (usbhsf_dma_map(pkt) < 0) |
| 873 | goto usbhsf_pio_prepare_push; |
| 874 | |
| 875 | ret = usbhsf_fifo_select(pipe, fifo, 0); |
| 876 | if (ret < 0) |
| 877 | goto usbhsf_pio_prepare_push_unmap; |
| 878 | |
| 879 | pkt->trans = len; |
| 880 | |
| 881 | INIT_WORK(&pkt->work, xfer_work); |
| 882 | schedule_work(&pkt->work); |
| 883 | |
| 884 | return 0; |
| 885 | |
| 886 | usbhsf_pio_prepare_push_unmap: |
| 887 | usbhsf_dma_unmap(pkt); |
| 888 | usbhsf_pio_prepare_push: |
| 889 | /* |
| 890 | * change handler to PIO |
| 891 | */ |
| 892 | pkt->handler = &usbhs_fifo_pio_push_handler; |
| 893 | |
| 894 | return pkt->handler->prepare(pkt, is_done); |
| 895 | } |
| 896 | |
| 897 | static int usbhsf_dma_push_done(struct usbhs_pkt *pkt, int *is_done) |
| 898 | { |
| 899 | struct usbhs_pipe *pipe = pkt->pipe; |
| 900 | |
| 901 | pkt->actual = pkt->trans; |
| 902 | |
| 903 | *is_done = !pkt->zero; /* send zero packet ? */ |
| 904 | usbhs_pipe_running(pipe, !*is_done); |
| 905 | |
| 906 | usbhsf_dma_stop(pipe, pipe->fifo); |
| 907 | usbhsf_dma_unmap(pkt); |
| 908 | usbhsf_fifo_unselect(pipe, pipe->fifo); |
| 909 | |
| 910 | return 0; |
| 911 | } |
| 912 | |
| 913 | struct usbhs_pkt_handle usbhs_fifo_dma_push_handler = { |
| 914 | .prepare = usbhsf_dma_prepare_push, |
| 915 | .dma_done = usbhsf_dma_push_done, |
| 916 | }; |
| 917 | |
| 918 | /* |
| 919 | * DMA pop handler |
| 920 | */ |
| 921 | static int usbhsf_dma_try_pop(struct usbhs_pkt *pkt, int *is_done) |
| 922 | { |
| 923 | struct usbhs_pipe *pipe = pkt->pipe; |
| 924 | struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe); |
| 925 | struct usbhs_fifo *fifo; |
| 926 | int len, ret; |
| 927 | |
| 928 | if (usbhs_pipe_is_busy(pipe)) |
| 929 | return 0; |
| 930 | |
| 931 | if (usbhs_pipe_is_dcp(pipe)) |
| 932 | goto usbhsf_pio_prepare_pop; |
| 933 | |
| 934 | /* get enable DMA fifo */ |
| 935 | fifo = usbhsf_get_dma_fifo(priv, pkt); |
| 936 | if (!fifo) |
| 937 | goto usbhsf_pio_prepare_pop; |
| 938 | |
| 939 | if ((uintptr_t)(pkt->buf + pkt->actual) & 0x7) /* 8byte alignment */ |
| 940 | goto usbhsf_pio_prepare_pop; |
| 941 | |
| 942 | ret = usbhsf_fifo_select(pipe, fifo, 0); |
| 943 | if (ret < 0) |
| 944 | goto usbhsf_pio_prepare_pop; |
| 945 | |
| 946 | /* use PIO if packet is less than pio_dma_border */ |
| 947 | len = usbhsf_fifo_rcv_len(priv, fifo); |
| 948 | len = min(pkt->length - pkt->actual, len); |
| 949 | if (len & 0x7) /* 8byte alignment */ |
| 950 | goto usbhsf_pio_prepare_pop_unselect; |
| 951 | |
| 952 | if (len < usbhs_get_dparam(priv, pio_dma_border)) |
| 953 | goto usbhsf_pio_prepare_pop_unselect; |
| 954 | |
| 955 | ret = usbhsf_fifo_barrier(priv, fifo); |
| 956 | if (ret < 0) |
| 957 | goto usbhsf_pio_prepare_pop_unselect; |
| 958 | |
| 959 | if (usbhsf_dma_map(pkt) < 0) |
| 960 | goto usbhsf_pio_prepare_pop_unselect; |
| 961 | |
| 962 | /* DMA */ |
| 963 | |
| 964 | /* |
| 965 | * usbhs_fifo_dma_pop_handler :: prepare |
| 966 | * enabled irq to come here. |
| 967 | * but it is no longer needed for DMA. disable it. |
| 968 | */ |
| 969 | usbhsf_rx_irq_ctrl(pipe, 0); |
| 970 | |
| 971 | pkt->trans = len; |
| 972 | |
| 973 | usbhsf_tx_irq_ctrl(pipe, 0); |
| 974 | INIT_WORK(&pkt->work, xfer_work); |
| 975 | schedule_work(&pkt->work); |
| 976 | |
| 977 | return 0; |
| 978 | |
| 979 | usbhsf_pio_prepare_pop_unselect: |
| 980 | usbhsf_fifo_unselect(pipe, fifo); |
| 981 | usbhsf_pio_prepare_pop: |
| 982 | |
| 983 | /* |
| 984 | * change handler to PIO |
| 985 | */ |
| 986 | pkt->handler = &usbhs_fifo_pio_pop_handler; |
| 987 | |
| 988 | return pkt->handler->try_run(pkt, is_done); |
| 989 | } |
| 990 | |
| 991 | static int usbhsf_dma_pop_done(struct usbhs_pkt *pkt, int *is_done) |
| 992 | { |
| 993 | struct usbhs_pipe *pipe = pkt->pipe; |
| 994 | int maxp = usbhs_pipe_get_maxpacket(pipe); |
| 995 | |
| 996 | usbhsf_dma_stop(pipe, pipe->fifo); |
| 997 | usbhsf_dma_unmap(pkt); |
| 998 | usbhsf_fifo_unselect(pipe, pipe->fifo); |
| 999 | |
| 1000 | pkt->actual += pkt->trans; |
| 1001 | |
| 1002 | if ((pkt->actual == pkt->length) || /* receive all data */ |
| 1003 | (pkt->trans < maxp)) { /* short packet */ |
| 1004 | *is_done = 1; |
| 1005 | usbhs_pipe_running(pipe, 0); |
| 1006 | } else { |
| 1007 | /* re-enable */ |
| 1008 | usbhs_pipe_running(pipe, 0); |
| 1009 | usbhsf_prepare_pop(pkt, is_done); |
| 1010 | } |
| 1011 | |
| 1012 | return 0; |
| 1013 | } |
| 1014 | |
| 1015 | struct usbhs_pkt_handle usbhs_fifo_dma_pop_handler = { |
| 1016 | .prepare = usbhsf_prepare_pop, |
| 1017 | .try_run = usbhsf_dma_try_pop, |
| 1018 | .dma_done = usbhsf_dma_pop_done |
| 1019 | }; |
| 1020 | |
| 1021 | /* |
| 1022 | * DMA setting |
| 1023 | */ |
| 1024 | static bool usbhsf_dma_filter(struct dma_chan *chan, void *param) |
| 1025 | { |
| 1026 | struct sh_dmae_slave *slave = param; |
| 1027 | |
| 1028 | /* |
| 1029 | * FIXME |
| 1030 | * |
| 1031 | * usbhs doesn't recognize id = 0 as valid DMA |
| 1032 | */ |
| 1033 | if (0 == slave->shdma_slave.slave_id) |
| 1034 | return false; |
| 1035 | |
| 1036 | chan->private = slave; |
| 1037 | |
| 1038 | return true; |
| 1039 | } |
| 1040 | |
| 1041 | static void usbhsf_dma_quit(struct usbhs_priv *priv, struct usbhs_fifo *fifo) |
| 1042 | { |
| 1043 | if (fifo->tx_chan) |
| 1044 | dma_release_channel(fifo->tx_chan); |
| 1045 | if (fifo->rx_chan) |
| 1046 | dma_release_channel(fifo->rx_chan); |
| 1047 | |
| 1048 | fifo->tx_chan = NULL; |
| 1049 | fifo->rx_chan = NULL; |
| 1050 | } |
| 1051 | |
| 1052 | static void usbhsf_dma_init(struct usbhs_priv *priv, |
| 1053 | struct usbhs_fifo *fifo) |
| 1054 | { |
| 1055 | struct device *dev = usbhs_priv_to_dev(priv); |
| 1056 | dma_cap_mask_t mask; |
| 1057 | |
| 1058 | dma_cap_zero(mask); |
| 1059 | dma_cap_set(DMA_SLAVE, mask); |
| 1060 | fifo->tx_chan = dma_request_channel(mask, usbhsf_dma_filter, |
| 1061 | &fifo->tx_slave); |
| 1062 | |
| 1063 | dma_cap_zero(mask); |
| 1064 | dma_cap_set(DMA_SLAVE, mask); |
| 1065 | fifo->rx_chan = dma_request_channel(mask, usbhsf_dma_filter, |
| 1066 | &fifo->rx_slave); |
| 1067 | |
| 1068 | if (fifo->tx_chan || fifo->rx_chan) |
| 1069 | dev_dbg(dev, "enable DMAEngine (%s%s%s)\n", |
| 1070 | fifo->name, |
| 1071 | fifo->tx_chan ? "[TX]" : " ", |
| 1072 | fifo->rx_chan ? "[RX]" : " "); |
| 1073 | } |
| 1074 | |
| 1075 | /* |
| 1076 | * irq functions |
| 1077 | */ |
| 1078 | static int usbhsf_irq_empty(struct usbhs_priv *priv, |
| 1079 | struct usbhs_irq_state *irq_state) |
| 1080 | { |
| 1081 | struct usbhs_pipe *pipe; |
| 1082 | struct device *dev = usbhs_priv_to_dev(priv); |
| 1083 | int i, ret; |
| 1084 | |
| 1085 | if (!irq_state->bempsts) { |
| 1086 | dev_err(dev, "debug %s !!\n", __func__); |
| 1087 | return -EIO; |
| 1088 | } |
| 1089 | |
| 1090 | dev_dbg(dev, "irq empty [0x%04x]\n", irq_state->bempsts); |
| 1091 | |
| 1092 | /* |
| 1093 | * search interrupted "pipe" |
| 1094 | * not "uep". |
| 1095 | */ |
| 1096 | usbhs_for_each_pipe_with_dcp(pipe, priv, i) { |
| 1097 | if (!(irq_state->bempsts & (1 << i))) |
| 1098 | continue; |
| 1099 | |
| 1100 | ret = usbhsf_pkt_handler(pipe, USBHSF_PKT_TRY_RUN); |
| 1101 | if (ret < 0) |
| 1102 | dev_err(dev, "irq_empty run_error %d : %d\n", i, ret); |
| 1103 | } |
| 1104 | |
| 1105 | return 0; |
| 1106 | } |
| 1107 | |
| 1108 | static int usbhsf_irq_ready(struct usbhs_priv *priv, |
| 1109 | struct usbhs_irq_state *irq_state) |
| 1110 | { |
| 1111 | struct usbhs_pipe *pipe; |
| 1112 | struct device *dev = usbhs_priv_to_dev(priv); |
| 1113 | int i, ret; |
| 1114 | |
| 1115 | if (!irq_state->brdysts) { |
| 1116 | dev_err(dev, "debug %s !!\n", __func__); |
| 1117 | return -EIO; |
| 1118 | } |
| 1119 | |
| 1120 | dev_dbg(dev, "irq ready [0x%04x]\n", irq_state->brdysts); |
| 1121 | |
| 1122 | /* |
| 1123 | * search interrupted "pipe" |
| 1124 | * not "uep". |
| 1125 | */ |
| 1126 | usbhs_for_each_pipe_with_dcp(pipe, priv, i) { |
| 1127 | if (!(irq_state->brdysts & (1 << i))) |
| 1128 | continue; |
| 1129 | |
| 1130 | ret = usbhsf_pkt_handler(pipe, USBHSF_PKT_TRY_RUN); |
| 1131 | if (ret < 0) |
| 1132 | dev_err(dev, "irq_ready run_error %d : %d\n", i, ret); |
| 1133 | } |
| 1134 | |
| 1135 | return 0; |
| 1136 | } |
| 1137 | |
| 1138 | static void usbhsf_dma_complete(void *arg) |
| 1139 | { |
| 1140 | struct usbhs_pipe *pipe = arg; |
| 1141 | struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe); |
| 1142 | struct device *dev = usbhs_priv_to_dev(priv); |
| 1143 | int ret; |
| 1144 | |
| 1145 | ret = usbhsf_pkt_handler(pipe, USBHSF_PKT_DMA_DONE); |
| 1146 | if (ret < 0) |
| 1147 | dev_err(dev, "dma_complete run_error %d : %d\n", |
| 1148 | usbhs_pipe_number(pipe), ret); |
| 1149 | } |
| 1150 | |
| 1151 | /* |
| 1152 | * fifo init |
| 1153 | */ |
| 1154 | void usbhs_fifo_init(struct usbhs_priv *priv) |
| 1155 | { |
| 1156 | struct usbhs_mod *mod = usbhs_mod_get_current(priv); |
| 1157 | struct usbhs_fifo *cfifo = usbhsf_get_cfifo(priv); |
| 1158 | struct usbhs_fifo *d0fifo = usbhsf_get_d0fifo(priv); |
| 1159 | struct usbhs_fifo *d1fifo = usbhsf_get_d1fifo(priv); |
| 1160 | |
| 1161 | mod->irq_empty = usbhsf_irq_empty; |
| 1162 | mod->irq_ready = usbhsf_irq_ready; |
| 1163 | mod->irq_bempsts = 0; |
| 1164 | mod->irq_brdysts = 0; |
| 1165 | |
| 1166 | cfifo->pipe = NULL; |
| 1167 | cfifo->tx_chan = NULL; |
| 1168 | cfifo->rx_chan = NULL; |
| 1169 | |
| 1170 | d0fifo->pipe = NULL; |
| 1171 | d0fifo->tx_chan = NULL; |
| 1172 | d0fifo->rx_chan = NULL; |
| 1173 | |
| 1174 | d1fifo->pipe = NULL; |
| 1175 | d1fifo->tx_chan = NULL; |
| 1176 | d1fifo->rx_chan = NULL; |
| 1177 | |
| 1178 | usbhsf_dma_init(priv, usbhsf_get_d0fifo(priv)); |
| 1179 | usbhsf_dma_init(priv, usbhsf_get_d1fifo(priv)); |
| 1180 | } |
| 1181 | |
| 1182 | void usbhs_fifo_quit(struct usbhs_priv *priv) |
| 1183 | { |
| 1184 | struct usbhs_mod *mod = usbhs_mod_get_current(priv); |
| 1185 | |
| 1186 | mod->irq_empty = NULL; |
| 1187 | mod->irq_ready = NULL; |
| 1188 | mod->irq_bempsts = 0; |
| 1189 | mod->irq_brdysts = 0; |
| 1190 | |
| 1191 | usbhsf_dma_quit(priv, usbhsf_get_d0fifo(priv)); |
| 1192 | usbhsf_dma_quit(priv, usbhsf_get_d1fifo(priv)); |
| 1193 | } |
| 1194 | |
| 1195 | int usbhs_fifo_probe(struct usbhs_priv *priv) |
| 1196 | { |
| 1197 | struct usbhs_fifo *fifo; |
| 1198 | |
| 1199 | /* CFIFO */ |
| 1200 | fifo = usbhsf_get_cfifo(priv); |
| 1201 | fifo->name = "CFIFO"; |
| 1202 | fifo->port = CFIFO; |
| 1203 | fifo->sel = CFIFOSEL; |
| 1204 | fifo->ctr = CFIFOCTR; |
| 1205 | |
| 1206 | /* D0FIFO */ |
| 1207 | fifo = usbhsf_get_d0fifo(priv); |
| 1208 | fifo->name = "D0FIFO"; |
| 1209 | fifo->port = D0FIFO; |
| 1210 | fifo->sel = D0FIFOSEL; |
| 1211 | fifo->ctr = D0FIFOCTR; |
| 1212 | fifo->tx_slave.shdma_slave.slave_id = usbhs_get_dparam(priv, d0_tx_id); |
| 1213 | fifo->rx_slave.shdma_slave.slave_id = usbhs_get_dparam(priv, d0_rx_id); |
| 1214 | |
| 1215 | /* D1FIFO */ |
| 1216 | fifo = usbhsf_get_d1fifo(priv); |
| 1217 | fifo->name = "D1FIFO"; |
| 1218 | fifo->port = D1FIFO; |
| 1219 | fifo->sel = D1FIFOSEL; |
| 1220 | fifo->ctr = D1FIFOCTR; |
| 1221 | fifo->tx_slave.shdma_slave.slave_id = usbhs_get_dparam(priv, d1_tx_id); |
| 1222 | fifo->rx_slave.shdma_slave.slave_id = usbhs_get_dparam(priv, d1_rx_id); |
| 1223 | |
| 1224 | return 0; |
| 1225 | } |
| 1226 | |
| 1227 | void usbhs_fifo_remove(struct usbhs_priv *priv) |
| 1228 | { |
| 1229 | } |