1// SPDX-License-Identifier: GPL-2.0 2/* 3 * c8sectpfe-core.c - C8SECTPFE STi DVB driver 4 * 5 * Copyright (c) STMicroelectronics 2015 6 * 7 * Author:Peter Bennett <peter.bennett@st.com> 8 * Peter Griffin <peter.griffin@linaro.org> 9 * 10 */ 11#include <linux/atomic.h> 12#include <linux/clk.h> 13#include <linux/completion.h> 14#include <linux/delay.h> 15#include <linux/device.h> 16#include <linux/dma-mapping.h> 17#include <linux/dvb/dmx.h> 18#include <linux/dvb/frontend.h> 19#include <linux/err.h> 20#include <linux/errno.h> 21#include <linux/firmware.h> 22#include <linux/gpio/consumer.h> 23#include <linux/init.h> 24#include <linux/interrupt.h> 25#include <linux/io.h> 26#include <linux/module.h> 27#include <linux/of_gpio.h> 28#include <linux/of_platform.h> 29#include <linux/pinctrl/consumer.h> 30#include <linux/pinctrl/pinctrl.h> 31#include <linux/platform_device.h> 32#include <linux/slab.h> 33#include <linux/time.h> 34#include <linux/usb.h> 35#include <linux/wait.h> 36 37#include "c8sectpfe-common.h" 38#include "c8sectpfe-core.h" 39#include "c8sectpfe-debugfs.h" 40 41#include <media/dmxdev.h> 42#include <media/dvb_demux.h> 43#include <media/dvb_frontend.h> 44#include <media/dvb_net.h> 45 46#define FIRMWARE_MEMDMA "pti_memdma_h407.elf" 47MODULE_FIRMWARE(FIRMWARE_MEMDMA); 48 49#define PID_TABLE_SIZE 1024 50#define POLL_MSECS 50 51 52static int load_c8sectpfe_fw(struct c8sectpfei *fei); 53 54#define TS_PKT_SIZE 188 55#define HEADER_SIZE (4) 56#define PACKET_SIZE (TS_PKT_SIZE+HEADER_SIZE) 57 58#define FEI_ALIGNMENT (32) 59/* hw requires minimum of 8*PACKET_SIZE and padded to 8byte boundary */ 60#define FEI_BUFFER_SIZE (8*PACKET_SIZE*340) 61 62#define FIFO_LEN 1024 63 64static void c8sectpfe_timer_interrupt(struct timer_list *t) 65{ 66 struct c8sectpfei *fei = from_timer(fei, t, timer); 67 struct channel_info *channel; 68 int chan_num; 69 70 /* iterate through input block channels */ 71 for (chan_num = 0; chan_num < fei->tsin_count; chan_num++) { 72 channel = fei->channel_data[chan_num]; 73 74 /* is this descriptor initialised and TP enabled */ 75 if (channel->irec && readl(channel->irec + DMA_PRDS_TPENABLE)) 76 tasklet_schedule(&channel->tsklet); 77 } 78 79 fei->timer.expires = jiffies + msecs_to_jiffies(POLL_MSECS); 80 add_timer(&fei->timer); 81} 82 83static void channel_swdemux_tsklet(struct tasklet_struct *t) 84{ 85 struct channel_info *channel = from_tasklet(channel, t, tsklet); 86 struct c8sectpfei *fei; 87 unsigned long wp, rp; 88 int pos, num_packets, n, size; 89 u8 *buf; 90 91 if (unlikely(!channel || !channel->irec)) 92 return; 93 94 fei = channel->fei; 95 96 wp = readl(channel->irec + DMA_PRDS_BUSWP_TP(0)); 97 rp = readl(channel->irec + DMA_PRDS_BUSRP_TP(0)); 98 99 pos = rp - channel->back_buffer_busaddr; 100 101 /* has it wrapped */ 102 if (wp < rp) 103 wp = channel->back_buffer_busaddr + FEI_BUFFER_SIZE; 104 105 size = wp - rp; 106 num_packets = size / PACKET_SIZE; 107 108 /* manage cache so data is visible to CPU */ 109 dma_sync_single_for_cpu(fei->dev, 110 rp, 111 size, 112 DMA_FROM_DEVICE); 113 114 buf = channel->back_buffer_aligned; 115 116 dev_dbg(fei->dev, 117 "chan=%d channel=%p num_packets = %d, buf = %p, pos = 0x%x\n\trp=0x%lx, wp=0x%lx\n", 118 channel->tsin_id, channel, num_packets, buf, pos, rp, wp); 119 120 for (n = 0; n < num_packets; n++) { 121 dvb_dmx_swfilter_packets( 122 &fei->c8sectpfe[0]-> 123 demux[channel->demux_mapping].dvb_demux, 124 &buf[pos], 1); 125 126 pos += PACKET_SIZE; 127 } 128 129 /* advance the read pointer */ 130 if (wp == (channel->back_buffer_busaddr + FEI_BUFFER_SIZE)) 131 writel(channel->back_buffer_busaddr, channel->irec + 132 DMA_PRDS_BUSRP_TP(0)); 133 else 134 writel(wp, channel->irec + DMA_PRDS_BUSRP_TP(0)); 135} 136 137static int c8sectpfe_start_feed(struct dvb_demux_feed *dvbdmxfeed) 138{ 139 struct dvb_demux *demux = dvbdmxfeed->demux; 140 struct stdemux *stdemux = demux->priv; 141 struct c8sectpfei *fei = stdemux->c8sectpfei; 142 struct channel_info *channel; 143 u32 tmp; 144 unsigned long *bitmap; 145 int ret; 146 147 switch (dvbdmxfeed->type) { 148 case DMX_TYPE_TS: 149 break; 150 case DMX_TYPE_SEC: 151 break; 152 default: 153 dev_err(fei->dev, "%s:%d Error bailing\n" 154 , __func__, __LINE__); 155 return -EINVAL; 156 } 157 158 if (dvbdmxfeed->type == DMX_TYPE_TS) { 159 switch (dvbdmxfeed->pes_type) { 160 case DMX_PES_VIDEO: 161 case DMX_PES_AUDIO: 162 case DMX_PES_TELETEXT: 163 case DMX_PES_PCR: 164 case DMX_PES_OTHER: 165 break; 166 default: 167 dev_err(fei->dev, "%s:%d Error bailing\n" 168 , __func__, __LINE__); 169 return -EINVAL; 170 } 171 } 172 173 if (!atomic_read(&fei->fw_loaded)) { 174 ret = load_c8sectpfe_fw(fei); 175 if (ret) 176 return ret; 177 } 178 179 mutex_lock(&fei->lock); 180 181 channel = fei->channel_data[stdemux->tsin_index]; 182 183 bitmap = channel->pid_buffer_aligned; 184 185 /* 8192 is a special PID */ 186 if (dvbdmxfeed->pid == 8192) { 187 tmp = readl(fei->io + C8SECTPFE_IB_PID_SET(channel->tsin_id)); 188 tmp &= ~C8SECTPFE_PID_ENABLE; 189 writel(tmp, fei->io + C8SECTPFE_IB_PID_SET(channel->tsin_id)); 190 191 } else { 192 bitmap_set(bitmap, dvbdmxfeed->pid, 1); 193 } 194 195 /* manage cache so PID bitmap is visible to HW */ 196 dma_sync_single_for_device(fei->dev, 197 channel->pid_buffer_busaddr, 198 PID_TABLE_SIZE, 199 DMA_TO_DEVICE); 200 201 channel->active = 1; 202 203 if (fei->global_feed_count == 0) { 204 fei->timer.expires = jiffies + 205 msecs_to_jiffies(msecs_to_jiffies(POLL_MSECS)); 206 207 add_timer(&fei->timer); 208 } 209 210 if (stdemux->running_feed_count == 0) { 211 212 dev_dbg(fei->dev, "Starting channel=%p\n", channel); 213 214 tasklet_setup(&channel->tsklet, channel_swdemux_tsklet); 215 216 /* Reset the internal inputblock sram pointers */ 217 writel(channel->fifo, 218 fei->io + C8SECTPFE_IB_BUFF_STRT(channel->tsin_id)); 219 writel(channel->fifo + FIFO_LEN - 1, 220 fei->io + C8SECTPFE_IB_BUFF_END(channel->tsin_id)); 221 222 writel(channel->fifo, 223 fei->io + C8SECTPFE_IB_READ_PNT(channel->tsin_id)); 224 writel(channel->fifo, 225 fei->io + C8SECTPFE_IB_WRT_PNT(channel->tsin_id)); 226 227 228 /* reset read / write memdma ptrs for this channel */ 229 writel(channel->back_buffer_busaddr, channel->irec + 230 DMA_PRDS_BUSBASE_TP(0)); 231 232 tmp = channel->back_buffer_busaddr + FEI_BUFFER_SIZE - 1; 233 writel(tmp, channel->irec + DMA_PRDS_BUSTOP_TP(0)); 234 235 writel(channel->back_buffer_busaddr, channel->irec + 236 DMA_PRDS_BUSWP_TP(0)); 237 238 /* Issue a reset and enable InputBlock */ 239 writel(C8SECTPFE_SYS_ENABLE | C8SECTPFE_SYS_RESET 240 , fei->io + C8SECTPFE_IB_SYS(channel->tsin_id)); 241 242 /* and enable the tp */ 243 writel(0x1, channel->irec + DMA_PRDS_TPENABLE); 244 245 dev_dbg(fei->dev, "%s:%d Starting DMA feed on stdemux=%p\n" 246 , __func__, __LINE__, stdemux); 247 } 248 249 stdemux->running_feed_count++; 250 fei->global_feed_count++; 251 252 mutex_unlock(&fei->lock); 253 254 return 0; 255} 256 257static int c8sectpfe_stop_feed(struct dvb_demux_feed *dvbdmxfeed) 258{ 259 260 struct dvb_demux *demux = dvbdmxfeed->demux; 261 struct stdemux *stdemux = demux->priv; 262 struct c8sectpfei *fei = stdemux->c8sectpfei; 263 struct channel_info *channel; 264 int idlereq; 265 u32 tmp; 266 int ret; 267 unsigned long *bitmap; 268 269 if (!atomic_read(&fei->fw_loaded)) { 270 ret = load_c8sectpfe_fw(fei); 271 if (ret) 272 return ret; 273 } 274 275 mutex_lock(&fei->lock); 276 277 channel = fei->channel_data[stdemux->tsin_index]; 278 279 bitmap = channel->pid_buffer_aligned; 280 281 if (dvbdmxfeed->pid == 8192) { 282 tmp = readl(fei->io + C8SECTPFE_IB_PID_SET(channel->tsin_id)); 283 tmp |= C8SECTPFE_PID_ENABLE; 284 writel(tmp, fei->io + C8SECTPFE_IB_PID_SET(channel->tsin_id)); 285 } else { 286 bitmap_clear(bitmap, dvbdmxfeed->pid, 1); 287 } 288 289 /* manage cache so data is visible to HW */ 290 dma_sync_single_for_device(fei->dev, 291 channel->pid_buffer_busaddr, 292 PID_TABLE_SIZE, 293 DMA_TO_DEVICE); 294 295 if (--stdemux->running_feed_count == 0) { 296 297 channel = fei->channel_data[stdemux->tsin_index]; 298 299 /* TP re-configuration on page 168 of functional spec */ 300 301 /* disable IB (prevents more TS data going to memdma) */ 302 writel(0, fei->io + C8SECTPFE_IB_SYS(channel->tsin_id)); 303 304 /* disable this channels descriptor */ 305 writel(0, channel->irec + DMA_PRDS_TPENABLE); 306 307 tasklet_disable(&channel->tsklet); 308 309 /* now request memdma channel goes idle */ 310 idlereq = (1 << channel->tsin_id) | IDLEREQ; 311 writel(idlereq, fei->io + DMA_IDLE_REQ); 312 313 /* wait for idle irq handler to signal completion */ 314 ret = wait_for_completion_timeout(&channel->idle_completion, 315 msecs_to_jiffies(100)); 316 317 if (ret == 0) 318 dev_warn(fei->dev, 319 "Timeout waiting for idle irq on tsin%d\n", 320 channel->tsin_id); 321 322 reinit_completion(&channel->idle_completion); 323 324 /* reset read / write ptrs for this channel */ 325 326 writel(channel->back_buffer_busaddr, 327 channel->irec + DMA_PRDS_BUSBASE_TP(0)); 328 329 tmp = channel->back_buffer_busaddr + FEI_BUFFER_SIZE - 1; 330 writel(tmp, channel->irec + DMA_PRDS_BUSTOP_TP(0)); 331 332 writel(channel->back_buffer_busaddr, 333 channel->irec + DMA_PRDS_BUSWP_TP(0)); 334 335 dev_dbg(fei->dev, 336 "%s:%d stopping DMA feed on stdemux=%p channel=%d\n", 337 __func__, __LINE__, stdemux, channel->tsin_id); 338 339 /* turn off all PIDS in the bitmap */ 340 memset(channel->pid_buffer_aligned, 0, PID_TABLE_SIZE); 341 342 /* manage cache so data is visible to HW */ 343 dma_sync_single_for_device(fei->dev, 344 channel->pid_buffer_busaddr, 345 PID_TABLE_SIZE, 346 DMA_TO_DEVICE); 347 348 channel->active = 0; 349 } 350 351 if (--fei->global_feed_count == 0) { 352 dev_dbg(fei->dev, "%s:%d global_feed_count=%d\n" 353 , __func__, __LINE__, fei->global_feed_count); 354 355 del_timer(&fei->timer); 356 } 357 358 mutex_unlock(&fei->lock); 359 360 return 0; 361} 362 363static struct channel_info *find_channel(struct c8sectpfei *fei, int tsin_num) 364{ 365 int i; 366 367 for (i = 0; i < C8SECTPFE_MAX_TSIN_CHAN; i++) { 368 if (!fei->channel_data[i]) 369 continue; 370 371 if (fei->channel_data[i]->tsin_id == tsin_num) 372 return fei->channel_data[i]; 373 } 374 375 return NULL; 376} 377 378static void c8sectpfe_getconfig(struct c8sectpfei *fei) 379{ 380 struct c8sectpfe_hw *hw = &fei->hw_stats; 381 382 hw->num_ib = readl(fei->io + SYS_CFG_NUM_IB); 383 hw->num_mib = readl(fei->io + SYS_CFG_NUM_MIB); 384 hw->num_swts = readl(fei->io + SYS_CFG_NUM_SWTS); 385 hw->num_tsout = readl(fei->io + SYS_CFG_NUM_TSOUT); 386 hw->num_ccsc = readl(fei->io + SYS_CFG_NUM_CCSC); 387 hw->num_ram = readl(fei->io + SYS_CFG_NUM_RAM); 388 hw->num_tp = readl(fei->io + SYS_CFG_NUM_TP); 389 390 dev_info(fei->dev, "C8SECTPFE hw supports the following:\n"); 391 dev_info(fei->dev, "Input Blocks: %d\n", hw->num_ib); 392 dev_info(fei->dev, "Merged Input Blocks: %d\n", hw->num_mib); 393 dev_info(fei->dev, "Software Transport Stream Inputs: %d\n" 394 , hw->num_swts); 395 dev_info(fei->dev, "Transport Stream Output: %d\n", hw->num_tsout); 396 dev_info(fei->dev, "Cable Card Converter: %d\n", hw->num_ccsc); 397 dev_info(fei->dev, "RAMs supported by C8SECTPFE: %d\n", hw->num_ram); 398 dev_info(fei->dev, "Tango TPs supported by C8SECTPFE: %d\n" 399 , hw->num_tp); 400} 401 402static irqreturn_t c8sectpfe_idle_irq_handler(int irq, void *priv) 403{ 404 struct c8sectpfei *fei = priv; 405 struct channel_info *chan; 406 int bit; 407 unsigned long tmp = readl(fei->io + DMA_IDLE_REQ); 408 409 /* page 168 of functional spec: Clear the idle request 410 by writing 0 to the C8SECTPFE_DMA_IDLE_REQ register. */ 411 412 /* signal idle completion */ 413 for_each_set_bit(bit, &tmp, fei->hw_stats.num_ib) { 414 415 chan = find_channel(fei, bit); 416 417 if (chan) 418 complete(&chan->idle_completion); 419 } 420 421 writel(0, fei->io + DMA_IDLE_REQ); 422 423 return IRQ_HANDLED; 424} 425 426 427static void free_input_block(struct c8sectpfei *fei, struct channel_info *tsin) 428{ 429 if (!fei || !tsin) 430 return; 431 432 if (tsin->back_buffer_busaddr) 433 if (!dma_mapping_error(fei->dev, tsin->back_buffer_busaddr)) 434 dma_unmap_single(fei->dev, tsin->back_buffer_busaddr, 435 FEI_BUFFER_SIZE, DMA_BIDIRECTIONAL); 436 437 kfree(tsin->back_buffer_start); 438 439 if (tsin->pid_buffer_busaddr) 440 if (!dma_mapping_error(fei->dev, tsin->pid_buffer_busaddr)) 441 dma_unmap_single(fei->dev, tsin->pid_buffer_busaddr, 442 PID_TABLE_SIZE, DMA_BIDIRECTIONAL); 443 444 kfree(tsin->pid_buffer_start); 445} 446 447#define MAX_NAME 20 448 449static int configure_memdma_and_inputblock(struct c8sectpfei *fei, 450 struct channel_info *tsin) 451{ 452 int ret; 453 u32 tmp; 454 char tsin_pin_name[MAX_NAME]; 455 456 if (!fei || !tsin) 457 return -EINVAL; 458 459 dev_dbg(fei->dev, "%s:%d Configuring channel=%p tsin=%d\n" 460 , __func__, __LINE__, tsin, tsin->tsin_id); 461 462 init_completion(&tsin->idle_completion); 463 464 tsin->back_buffer_start = kzalloc(FEI_BUFFER_SIZE + FEI_ALIGNMENT, GFP_KERNEL); 465 if (!tsin->back_buffer_start) { 466 ret = -ENOMEM; 467 goto err_unmap; 468 } 469 470 /* Ensure backbuffer is 32byte aligned */ 471 tsin->back_buffer_aligned = tsin->back_buffer_start + FEI_ALIGNMENT; 472 473 tsin->back_buffer_aligned = PTR_ALIGN(tsin->back_buffer_aligned, FEI_ALIGNMENT); 474 475 tsin->back_buffer_busaddr = dma_map_single(fei->dev, 476 tsin->back_buffer_aligned, 477 FEI_BUFFER_SIZE, 478 DMA_BIDIRECTIONAL); 479 480 if (dma_mapping_error(fei->dev, tsin->back_buffer_busaddr)) { 481 dev_err(fei->dev, "failed to map back_buffer\n"); 482 ret = -EFAULT; 483 goto err_unmap; 484 } 485 486 /* 487 * The pid buffer can be configured (in hw) for byte or bit 488 * per pid. By powers of deduction we conclude stih407 family 489 * is configured (at SoC design stage) for bit per pid. 490 */ 491 tsin->pid_buffer_start = kzalloc(PID_TABLE_SIZE + PID_TABLE_SIZE, GFP_KERNEL); 492 if (!tsin->pid_buffer_start) { 493 ret = -ENOMEM; 494 goto err_unmap; 495 } 496 497 /* 498 * PID buffer needs to be aligned to size of the pid table 499 * which at bit per pid is 1024 bytes (8192 pids / 8). 500 * PIDF_BASE register enforces this alignment when writing 501 * the register. 502 */ 503 504 tsin->pid_buffer_aligned = tsin->pid_buffer_start + PID_TABLE_SIZE; 505 506 tsin->pid_buffer_aligned = PTR_ALIGN(tsin->pid_buffer_aligned, PID_TABLE_SIZE); 507 508 tsin->pid_buffer_busaddr = dma_map_single(fei->dev, 509 tsin->pid_buffer_aligned, 510 PID_TABLE_SIZE, 511 DMA_BIDIRECTIONAL); 512 513 if (dma_mapping_error(fei->dev, tsin->pid_buffer_busaddr)) { 514 dev_err(fei->dev, "failed to map pid_bitmap\n"); 515 ret = -EFAULT; 516 goto err_unmap; 517 } 518 519 /* manage cache so pid bitmap is visible to HW */ 520 dma_sync_single_for_device(fei->dev, 521 tsin->pid_buffer_busaddr, 522 PID_TABLE_SIZE, 523 DMA_TO_DEVICE); 524 525 snprintf(tsin_pin_name, MAX_NAME, "tsin%d-%s", tsin->tsin_id, 526 (tsin->serial_not_parallel ? "serial" : "parallel")); 527 528 tsin->pstate = pinctrl_lookup_state(fei->pinctrl, tsin_pin_name); 529 if (IS_ERR(tsin->pstate)) { 530 dev_err(fei->dev, "%s: pinctrl_lookup_state couldn't find %s state\n" 531 , __func__, tsin_pin_name); 532 ret = PTR_ERR(tsin->pstate); 533 goto err_unmap; 534 } 535 536 ret = pinctrl_select_state(fei->pinctrl, tsin->pstate); 537 538 if (ret) { 539 dev_err(fei->dev, "%s: pinctrl_select_state failed\n" 540 , __func__); 541 goto err_unmap; 542 } 543 544 /* Enable this input block */ 545 tmp = readl(fei->io + SYS_INPUT_CLKEN); 546 tmp |= BIT(tsin->tsin_id); 547 writel(tmp, fei->io + SYS_INPUT_CLKEN); 548 549 if (tsin->serial_not_parallel) 550 tmp |= C8SECTPFE_SERIAL_NOT_PARALLEL; 551 552 if (tsin->invert_ts_clk) 553 tmp |= C8SECTPFE_INVERT_TSCLK; 554 555 if (tsin->async_not_sync) 556 tmp |= C8SECTPFE_ASYNC_NOT_SYNC; 557 558 tmp |= C8SECTPFE_ALIGN_BYTE_SOP | C8SECTPFE_BYTE_ENDIANNESS_MSB; 559 560 writel(tmp, fei->io + C8SECTPFE_IB_IP_FMT_CFG(tsin->tsin_id)); 561 562 writel(C8SECTPFE_SYNC(0x9) | 563 C8SECTPFE_DROP(0x9) | 564 C8SECTPFE_TOKEN(0x47), 565 fei->io + C8SECTPFE_IB_SYNCLCKDRP_CFG(tsin->tsin_id)); 566 567 writel(TS_PKT_SIZE, fei->io + C8SECTPFE_IB_PKT_LEN(tsin->tsin_id)); 568 569 /* Place the FIFO's at the end of the irec descriptors */ 570 571 tsin->fifo = (tsin->tsin_id * FIFO_LEN); 572 573 writel(tsin->fifo, fei->io + C8SECTPFE_IB_BUFF_STRT(tsin->tsin_id)); 574 writel(tsin->fifo + FIFO_LEN - 1, 575 fei->io + C8SECTPFE_IB_BUFF_END(tsin->tsin_id)); 576 577 writel(tsin->fifo, fei->io + C8SECTPFE_IB_READ_PNT(tsin->tsin_id)); 578 writel(tsin->fifo, fei->io + C8SECTPFE_IB_WRT_PNT(tsin->tsin_id)); 579 580 writel(tsin->pid_buffer_busaddr, 581 fei->io + PIDF_BASE(tsin->tsin_id)); 582 583 dev_dbg(fei->dev, "chan=%d PIDF_BASE=0x%x pid_bus_addr=%pad\n", 584 tsin->tsin_id, readl(fei->io + PIDF_BASE(tsin->tsin_id)), 585 &tsin->pid_buffer_busaddr); 586 587 /* Configure and enable HW PID filtering */ 588 589 /* 590 * The PID value is created by assembling the first 8 bytes of 591 * the TS packet into a 64-bit word in big-endian format. A 592 * slice of that 64-bit word is taken from 593 * (PID_OFFSET+PID_NUM_BITS-1) to PID_OFFSET. 594 */ 595 tmp = (C8SECTPFE_PID_ENABLE | C8SECTPFE_PID_NUMBITS(13) 596 | C8SECTPFE_PID_OFFSET(40)); 597 598 writel(tmp, fei->io + C8SECTPFE_IB_PID_SET(tsin->tsin_id)); 599 600 dev_dbg(fei->dev, "chan=%d setting wp: %d, rp: %d, buf: %d-%d\n", 601 tsin->tsin_id, 602 readl(fei->io + C8SECTPFE_IB_WRT_PNT(tsin->tsin_id)), 603 readl(fei->io + C8SECTPFE_IB_READ_PNT(tsin->tsin_id)), 604 readl(fei->io + C8SECTPFE_IB_BUFF_STRT(tsin->tsin_id)), 605 readl(fei->io + C8SECTPFE_IB_BUFF_END(tsin->tsin_id))); 606 607 /* Get base addpress of pointer record block from DMEM */ 608 tsin->irec = fei->io + DMA_MEMDMA_OFFSET + DMA_DMEM_OFFSET + 609 readl(fei->io + DMA_PTRREC_BASE); 610 611 /* fill out pointer record data structure */ 612 613 /* advance pointer record block to our channel */ 614 tsin->irec += (tsin->tsin_id * DMA_PRDS_SIZE); 615 616 writel(tsin->fifo, tsin->irec + DMA_PRDS_MEMBASE); 617 618 writel(tsin->fifo + FIFO_LEN - 1, tsin->irec + DMA_PRDS_MEMTOP); 619 620 writel((188 + 7)&~7, tsin->irec + DMA_PRDS_PKTSIZE); 621 622 writel(0x1, tsin->irec + DMA_PRDS_TPENABLE); 623 624 /* read/write pointers with physical bus address */ 625 626 writel(tsin->back_buffer_busaddr, tsin->irec + DMA_PRDS_BUSBASE_TP(0)); 627 628 tmp = tsin->back_buffer_busaddr + FEI_BUFFER_SIZE - 1; 629 writel(tmp, tsin->irec + DMA_PRDS_BUSTOP_TP(0)); 630 631 writel(tsin->back_buffer_busaddr, tsin->irec + DMA_PRDS_BUSWP_TP(0)); 632 writel(tsin->back_buffer_busaddr, tsin->irec + DMA_PRDS_BUSRP_TP(0)); 633 634 /* initialize tasklet */ 635 tasklet_setup(&tsin->tsklet, channel_swdemux_tsklet); 636 637 return 0; 638 639err_unmap: 640 free_input_block(fei, tsin); 641 return ret; 642} 643 644static irqreturn_t c8sectpfe_error_irq_handler(int irq, void *priv) 645{ 646 struct c8sectpfei *fei = priv; 647 648 dev_err(fei->dev, "%s: error handling not yet implemented\n" 649 , __func__); 650 651 /* 652 * TODO FIXME we should detect some error conditions here 653 * and ideally do something about them! 654 */ 655 656 return IRQ_HANDLED; 657} 658 659static int c8sectpfe_probe(struct platform_device *pdev) 660{ 661 struct device *dev = &pdev->dev; 662 struct device_node *child, *np = dev->of_node; 663 struct c8sectpfei *fei; 664 struct resource *res; 665 int ret, index = 0; 666 struct channel_info *tsin; 667 668 /* Allocate the c8sectpfei structure */ 669 fei = devm_kzalloc(dev, sizeof(struct c8sectpfei), GFP_KERNEL); 670 if (!fei) 671 return -ENOMEM; 672 673 fei->dev = dev; 674 675 res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "c8sectpfe"); 676 fei->io = devm_ioremap_resource(dev, res); 677 if (IS_ERR(fei->io)) 678 return PTR_ERR(fei->io); 679 680 res = platform_get_resource_byname(pdev, IORESOURCE_MEM, 681 "c8sectpfe-ram"); 682 fei->sram = devm_ioremap_resource(dev, res); 683 if (IS_ERR(fei->sram)) 684 return PTR_ERR(fei->sram); 685 686 fei->sram_size = resource_size(res); 687 688 fei->idle_irq = platform_get_irq_byname(pdev, "c8sectpfe-idle-irq"); 689 if (fei->idle_irq < 0) 690 return fei->idle_irq; 691 692 fei->error_irq = platform_get_irq_byname(pdev, "c8sectpfe-error-irq"); 693 if (fei->error_irq < 0) 694 return fei->error_irq; 695 696 platform_set_drvdata(pdev, fei); 697 698 fei->c8sectpfeclk = devm_clk_get_enabled(dev, "c8sectpfe"); 699 if (IS_ERR(fei->c8sectpfeclk)) { 700 dev_err(dev, "Failed to enable c8sectpfe clock\n"); 701 return PTR_ERR(fei->c8sectpfeclk); 702 } 703 704 /* to save power disable all IP's (on by default) */ 705 writel(0, fei->io + SYS_INPUT_CLKEN); 706 707 /* Enable memdma clock */ 708 writel(MEMDMAENABLE, fei->io + SYS_OTHER_CLKEN); 709 710 /* clear internal sram */ 711 memset_io(fei->sram, 0x0, fei->sram_size); 712 713 c8sectpfe_getconfig(fei); 714 715 ret = devm_request_irq(dev, fei->idle_irq, c8sectpfe_idle_irq_handler, 716 0, "c8sectpfe-idle-irq", fei); 717 if (ret) { 718 dev_err(dev, "Can't register c8sectpfe-idle-irq IRQ.\n"); 719 return ret; 720 } 721 722 ret = devm_request_irq(dev, fei->error_irq, 723 c8sectpfe_error_irq_handler, 0, 724 "c8sectpfe-error-irq", fei); 725 if (ret) { 726 dev_err(dev, "Can't register c8sectpfe-error-irq IRQ.\n"); 727 return ret; 728 } 729 730 fei->tsin_count = of_get_child_count(np); 731 732 if (fei->tsin_count > C8SECTPFE_MAX_TSIN_CHAN || 733 fei->tsin_count > fei->hw_stats.num_ib) { 734 735 dev_err(dev, "More tsin declared than exist on SoC!\n"); 736 return -EINVAL; 737 } 738 739 fei->pinctrl = devm_pinctrl_get(dev); 740 741 if (IS_ERR(fei->pinctrl)) { 742 dev_err(dev, "Error getting tsin pins\n"); 743 return PTR_ERR(fei->pinctrl); 744 } 745 746 for_each_child_of_node(np, child) { 747 struct device_node *i2c_bus; 748 749 fei->channel_data[index] = devm_kzalloc(dev, 750 sizeof(struct channel_info), 751 GFP_KERNEL); 752 753 if (!fei->channel_data[index]) { 754 ret = -ENOMEM; 755 goto err_node_put; 756 } 757 758 tsin = fei->channel_data[index]; 759 760 tsin->fei = fei; 761 762 ret = of_property_read_u32(child, "tsin-num", &tsin->tsin_id); 763 if (ret) { 764 dev_err(&pdev->dev, "No tsin_num found\n"); 765 goto err_node_put; 766 } 767 768 /* sanity check value */ 769 if (tsin->tsin_id > fei->hw_stats.num_ib) { 770 dev_err(&pdev->dev, 771 "tsin-num %d specified greater than number\n\tof input block hw in SoC! (%d)", 772 tsin->tsin_id, fei->hw_stats.num_ib); 773 ret = -EINVAL; 774 goto err_node_put; 775 } 776 777 tsin->invert_ts_clk = of_property_read_bool(child, 778 "invert-ts-clk"); 779 780 tsin->serial_not_parallel = of_property_read_bool(child, 781 "serial-not-parallel"); 782 783 tsin->async_not_sync = of_property_read_bool(child, 784 "async-not-sync"); 785 786 ret = of_property_read_u32(child, "dvb-card", 787 &tsin->dvb_card); 788 if (ret) { 789 dev_err(&pdev->dev, "No dvb-card found\n"); 790 goto err_node_put; 791 } 792 793 i2c_bus = of_parse_phandle(child, "i2c-bus", 0); 794 if (!i2c_bus) { 795 dev_err(&pdev->dev, "No i2c-bus found\n"); 796 ret = -ENODEV; 797 goto err_node_put; 798 } 799 tsin->i2c_adapter = 800 of_find_i2c_adapter_by_node(i2c_bus); 801 if (!tsin->i2c_adapter) { 802 dev_err(&pdev->dev, "No i2c adapter found\n"); 803 of_node_put(i2c_bus); 804 ret = -ENODEV; 805 goto err_node_put; 806 } 807 of_node_put(i2c_bus); 808 809 /* Acquire reset GPIO and activate it */ 810 tsin->rst_gpio = devm_fwnode_gpiod_get(dev, 811 of_fwnode_handle(child), 812 "reset", GPIOD_OUT_HIGH, 813 "NIM reset"); 814 ret = PTR_ERR_OR_ZERO(tsin->rst_gpio); 815 if (ret && ret != -EBUSY) { 816 dev_err(dev, "Can't request tsin%d reset gpio\n", 817 fei->channel_data[index]->tsin_id); 818 goto err_node_put; 819 } 820 821 if (!ret) { 822 /* wait for the chip to reset */ 823 usleep_range(3500, 5000); 824 /* release the reset line */ 825 gpiod_set_value_cansleep(tsin->rst_gpio, 0); 826 usleep_range(3000, 5000); 827 } 828 829 tsin->demux_mapping = index; 830 831 dev_dbg(fei->dev, 832 "channel=%p n=%d tsin_num=%d, invert-ts-clk=%d\n\tserial-not-parallel=%d pkt-clk-valid=%d dvb-card=%d\n", 833 fei->channel_data[index], index, 834 tsin->tsin_id, tsin->invert_ts_clk, 835 tsin->serial_not_parallel, tsin->async_not_sync, 836 tsin->dvb_card); 837 838 index++; 839 } 840 841 /* Setup timer interrupt */ 842 timer_setup(&fei->timer, c8sectpfe_timer_interrupt, 0); 843 844 mutex_init(&fei->lock); 845 846 /* Get the configuration information about the tuners */ 847 ret = c8sectpfe_tuner_register_frontend(&fei->c8sectpfe[0], 848 (void *)fei, 849 c8sectpfe_start_feed, 850 c8sectpfe_stop_feed); 851 if (ret) { 852 dev_err(dev, "c8sectpfe_tuner_register_frontend failed (%d)\n", 853 ret); 854 return ret; 855 } 856 857 c8sectpfe_debugfs_init(fei); 858 859 return 0; 860 861err_node_put: 862 of_node_put(child); 863 return ret; 864} 865 866static void c8sectpfe_remove(struct platform_device *pdev) 867{ 868 struct c8sectpfei *fei = platform_get_drvdata(pdev); 869 struct channel_info *channel; 870 int i; 871 872 wait_for_completion(&fei->fw_ack); 873 874 c8sectpfe_tuner_unregister_frontend(fei->c8sectpfe[0], fei); 875 876 /* 877 * Now loop through and un-configure each of the InputBlock resources 878 */ 879 for (i = 0; i < fei->tsin_count; i++) { 880 channel = fei->channel_data[i]; 881 free_input_block(fei, channel); 882 } 883 884 c8sectpfe_debugfs_exit(fei); 885 886 dev_info(fei->dev, "Stopping memdma SLIM core\n"); 887 if (readl(fei->io + DMA_CPU_RUN)) 888 writel(0x0, fei->io + DMA_CPU_RUN); 889 890 /* unclock all internal IP's */ 891 if (readl(fei->io + SYS_INPUT_CLKEN)) 892 writel(0, fei->io + SYS_INPUT_CLKEN); 893 894 if (readl(fei->io + SYS_OTHER_CLKEN)) 895 writel(0, fei->io + SYS_OTHER_CLKEN); 896} 897 898 899static int configure_channels(struct c8sectpfei *fei) 900{ 901 int index = 0, ret; 902 struct device_node *child, *np = fei->dev->of_node; 903 904 /* iterate round each tsin and configure memdma descriptor and IB hw */ 905 for_each_child_of_node(np, child) { 906 ret = configure_memdma_and_inputblock(fei, 907 fei->channel_data[index]); 908 if (ret) { 909 dev_err(fei->dev, 910 "configure_memdma_and_inputblock failed\n"); 911 of_node_put(child); 912 goto err_unmap; 913 } 914 index++; 915 } 916 917 return 0; 918 919err_unmap: 920 while (--index >= 0) 921 free_input_block(fei, fei->channel_data[index]); 922 923 return ret; 924} 925 926static int 927c8sectpfe_elf_sanity_check(struct c8sectpfei *fei, const struct firmware *fw) 928{ 929 struct elf32_hdr *ehdr; 930 char class; 931 932 if (!fw) { 933 dev_err(fei->dev, "failed to load %s\n", FIRMWARE_MEMDMA); 934 return -EINVAL; 935 } 936 937 if (fw->size < sizeof(struct elf32_hdr)) { 938 dev_err(fei->dev, "Image is too small\n"); 939 return -EINVAL; 940 } 941 942 ehdr = (struct elf32_hdr *)fw->data; 943 944 /* We only support ELF32 at this point */ 945 class = ehdr->e_ident[EI_CLASS]; 946 if (class != ELFCLASS32) { 947 dev_err(fei->dev, "Unsupported class: %d\n", class); 948 return -EINVAL; 949 } 950 951 if (ehdr->e_ident[EI_DATA] != ELFDATA2LSB) { 952 dev_err(fei->dev, "Unsupported firmware endianness\n"); 953 return -EINVAL; 954 } 955 956 if (fw->size < ehdr->e_shoff + sizeof(struct elf32_shdr)) { 957 dev_err(fei->dev, "Image is too small\n"); 958 return -EINVAL; 959 } 960 961 if (memcmp(ehdr->e_ident, ELFMAG, SELFMAG)) { 962 dev_err(fei->dev, "Image is corrupted (bad magic)\n"); 963 return -EINVAL; 964 } 965 966 /* Check ELF magic */ 967 ehdr = (Elf32_Ehdr *)fw->data; 968 if (ehdr->e_ident[EI_MAG0] != ELFMAG0 || 969 ehdr->e_ident[EI_MAG1] != ELFMAG1 || 970 ehdr->e_ident[EI_MAG2] != ELFMAG2 || 971 ehdr->e_ident[EI_MAG3] != ELFMAG3) { 972 dev_err(fei->dev, "Invalid ELF magic\n"); 973 return -EINVAL; 974 } 975 976 if (ehdr->e_type != ET_EXEC) { 977 dev_err(fei->dev, "Unsupported ELF header type\n"); 978 return -EINVAL; 979 } 980 981 if (ehdr->e_phoff > fw->size) { 982 dev_err(fei->dev, "Firmware size is too small\n"); 983 return -EINVAL; 984 } 985 986 return 0; 987} 988 989 990static void load_imem_segment(struct c8sectpfei *fei, Elf32_Phdr *phdr, 991 const struct firmware *fw, u8 __iomem *dest, 992 int seg_num) 993{ 994 const u8 *imem_src = fw->data + phdr->p_offset; 995 int i; 996 997 /* 998 * For IMEM segments, the segment contains 24-bit 999 * instructions which must be padded to 32-bit 1000 * instructions before being written. The written 1001 * segment is padded with NOP instructions. 1002 */ 1003 1004 dev_dbg(fei->dev, 1005 "Loading IMEM segment %d 0x%08x\n\t (0x%x bytes) -> 0x%p (0x%x bytes)\n", 1006 seg_num, phdr->p_paddr, phdr->p_filesz, dest, 1007 phdr->p_memsz + phdr->p_memsz / 3); 1008 1009 for (i = 0; i < phdr->p_filesz; i++) { 1010 1011 writeb(readb((void __iomem *)imem_src), (void __iomem *)dest); 1012 1013 /* Every 3 bytes, add an additional 1014 * padding zero in destination */ 1015 if (i % 3 == 2) { 1016 dest++; 1017 writeb(0x00, (void __iomem *)dest); 1018 } 1019 1020 dest++; 1021 imem_src++; 1022 } 1023} 1024 1025static void load_dmem_segment(struct c8sectpfei *fei, Elf32_Phdr *phdr, 1026 const struct firmware *fw, u8 __iomem *dst, int seg_num) 1027{ 1028 /* 1029 * For DMEM segments copy the segment data from the ELF 1030 * file and pad segment with zeroes 1031 */ 1032 1033 dev_dbg(fei->dev, 1034 "Loading DMEM segment %d 0x%08x\n\t(0x%x bytes) -> 0x%p (0x%x bytes)\n", 1035 seg_num, phdr->p_paddr, phdr->p_filesz, 1036 dst, phdr->p_memsz); 1037 1038 memcpy((void __force *)dst, (void *)fw->data + phdr->p_offset, 1039 phdr->p_filesz); 1040 1041 memset((void __force *)dst + phdr->p_filesz, 0, 1042 phdr->p_memsz - phdr->p_filesz); 1043} 1044 1045static int load_slim_core_fw(const struct firmware *fw, struct c8sectpfei *fei) 1046{ 1047 Elf32_Ehdr *ehdr; 1048 Elf32_Phdr *phdr; 1049 u8 __iomem *dst; 1050 int err = 0, i; 1051 1052 if (!fw || !fei) 1053 return -EINVAL; 1054 1055 ehdr = (Elf32_Ehdr *)fw->data; 1056 phdr = (Elf32_Phdr *)(fw->data + ehdr->e_phoff); 1057 1058 /* go through the available ELF segments */ 1059 for (i = 0; i < ehdr->e_phnum; i++, phdr++) { 1060 1061 /* Only consider LOAD segments */ 1062 if (phdr->p_type != PT_LOAD) 1063 continue; 1064 1065 /* 1066 * Check segment is contained within the fw->data buffer 1067 */ 1068 if (phdr->p_offset + phdr->p_filesz > fw->size) { 1069 dev_err(fei->dev, 1070 "Segment %d is outside of firmware file\n", i); 1071 err = -EINVAL; 1072 break; 1073 } 1074 1075 /* 1076 * MEMDMA IMEM has executable flag set, otherwise load 1077 * this segment into DMEM. 1078 * 1079 */ 1080 1081 if (phdr->p_flags & PF_X) { 1082 dst = (u8 __iomem *) fei->io + DMA_MEMDMA_IMEM; 1083 /* 1084 * The Slim ELF file uses 32-bit word addressing for 1085 * load offsets. 1086 */ 1087 dst += (phdr->p_paddr & 0xFFFFF) * sizeof(unsigned int); 1088 load_imem_segment(fei, phdr, fw, dst, i); 1089 } else { 1090 dst = (u8 __iomem *) fei->io + DMA_MEMDMA_DMEM; 1091 /* 1092 * The Slim ELF file uses 32-bit word addressing for 1093 * load offsets. 1094 */ 1095 dst += (phdr->p_paddr & 0xFFFFF) * sizeof(unsigned int); 1096 load_dmem_segment(fei, phdr, fw, dst, i); 1097 } 1098 } 1099 1100 release_firmware(fw); 1101 return err; 1102} 1103 1104static int load_c8sectpfe_fw(struct c8sectpfei *fei) 1105{ 1106 const struct firmware *fw; 1107 int err; 1108 1109 dev_info(fei->dev, "Loading firmware: %s\n", FIRMWARE_MEMDMA); 1110 1111 err = request_firmware(&fw, FIRMWARE_MEMDMA, fei->dev); 1112 if (err) 1113 return err; 1114 1115 err = c8sectpfe_elf_sanity_check(fei, fw); 1116 if (err) { 1117 dev_err(fei->dev, "c8sectpfe_elf_sanity_check failed err=(%d)\n" 1118 , err); 1119 release_firmware(fw); 1120 return err; 1121 } 1122 1123 err = load_slim_core_fw(fw, fei); 1124 if (err) { 1125 dev_err(fei->dev, "load_slim_core_fw failed err=(%d)\n", err); 1126 return err; 1127 } 1128 1129 /* now the firmware is loaded configure the input blocks */ 1130 err = configure_channels(fei); 1131 if (err) { 1132 dev_err(fei->dev, "configure_channels failed err=(%d)\n", err); 1133 return err; 1134 } 1135 1136 /* 1137 * STBus target port can access IMEM and DMEM ports 1138 * without waiting for CPU 1139 */ 1140 writel(0x1, fei->io + DMA_PER_STBUS_SYNC); 1141 1142 dev_info(fei->dev, "Boot the memdma SLIM core\n"); 1143 writel(0x1, fei->io + DMA_CPU_RUN); 1144 1145 atomic_set(&fei->fw_loaded, 1); 1146 1147 return 0; 1148} 1149 1150static const struct of_device_id c8sectpfe_match[] = { 1151 { .compatible = "st,stih407-c8sectpfe" }, 1152 { /* sentinel */ }, 1153}; 1154MODULE_DEVICE_TABLE(of, c8sectpfe_match); 1155 1156static struct platform_driver c8sectpfe_driver = { 1157 .driver = { 1158 .name = "c8sectpfe", 1159 .of_match_table = c8sectpfe_match, 1160 }, 1161 .probe = c8sectpfe_probe, 1162 .remove_new = c8sectpfe_remove, 1163}; 1164 1165module_platform_driver(c8sectpfe_driver); 1166 1167MODULE_AUTHOR("Peter Bennett <peter.bennett@st.com>"); 1168MODULE_AUTHOR("Peter Griffin <peter.griffin@linaro.org>"); 1169MODULE_DESCRIPTION("C8SECTPFE STi DVB Driver"); 1170MODULE_LICENSE("GPL"); 1171