drivers/media/video/cx18/cx18-firmware.c

   1 /*
   2  *  cx18 firmware functions
   3  *
   4  *  Copyright (C) 2007  Hans Verkuil <hverkuil@xs4all.nl>
   5  *  Copyright (C) 2008  Andy Walls <awalls@md.metrocast.net>
   6  *
   7  *  This program is free software; you can redistribute it and/or modify
   8  *  it under the terms of the GNU General Public License as published by
   9  *  the Free Software Foundation; either version 2 of the License, or
  10  *  (at your option) any later version.
  11  *
  12  *  This program is distributed in the hope that it will be useful,
  13  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15  *  GNU General Public License for more details.
  16  *
  17  *  You should have received a copy of the GNU General Public License
  18  *  along with this program; if not, write to the Free Software
  19  *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
  20  *  02111-1307  USA
  21  */
  22
  23 #include "cx18-driver.h"
  24 #include "cx18-io.h"
  25 #include "cx18-scb.h"
  26 #include "cx18-irq.h"
  27 #include "cx18-firmware.h"
  28 #include "cx18-cards.h"
  29 #include <linux/firmware.h>
  30
  31 #define CX18_PROC_SOFT_RESET            0xc70010
  32 #define CX18_DDR_SOFT_RESET             0xc70014
  33 #define CX18_CLOCK_SELECT1              0xc71000
  34 #define CX18_CLOCK_SELECT2              0xc71004
  35 #define CX18_HALF_CLOCK_SELECT1         0xc71008
  36 #define CX18_HALF_CLOCK_SELECT2         0xc7100C
  37 #define CX18_CLOCK_POLARITY1            0xc71010
  38 #define CX18_CLOCK_POLARITY2            0xc71014
  39 #define CX18_ADD_DELAY_ENABLE1          0xc71018
  40 #define CX18_ADD_DELAY_ENABLE2          0xc7101C
  41 #define CX18_CLOCK_ENABLE1              0xc71020
  42 #define CX18_CLOCK_ENABLE2              0xc71024
  43
  44 #define CX18_REG_BUS_TIMEOUT_EN         0xc72024
  45
  46 #define CX18_FAST_CLOCK_PLL_INT         0xc78000
  47 #define CX18_FAST_CLOCK_PLL_FRAC        0xc78004
  48 #define CX18_FAST_CLOCK_PLL_POST        0xc78008
  49 #define CX18_FAST_CLOCK_PLL_PRESCALE    0xc7800C
  50 #define CX18_FAST_CLOCK_PLL_ADJUST_BANDWIDTH 0xc78010
  51
  52 #define CX18_SLOW_CLOCK_PLL_INT         0xc78014
  53 #define CX18_SLOW_CLOCK_PLL_FRAC        0xc78018
  54 #define CX18_SLOW_CLOCK_PLL_POST        0xc7801C
  55 #define CX18_MPEG_CLOCK_PLL_INT         0xc78040
  56 #define CX18_MPEG_CLOCK_PLL_FRAC        0xc78044
  57 #define CX18_MPEG_CLOCK_PLL_POST        0xc78048
  58 #define CX18_PLL_POWER_DOWN             0xc78088
  59 #define CX18_SW1_INT_STATUS             0xc73104
  60 #define CX18_SW1_INT_ENABLE_PCI         0xc7311C
  61 #define CX18_SW2_INT_SET                0xc73140
  62 #define CX18_SW2_INT_STATUS             0xc73144
  63 #define CX18_ADEC_CONTROL               0xc78120
  64
  65 #define CX18_DDR_REQUEST_ENABLE         0xc80000
  66 #define CX18_DDR_CHIP_CONFIG            0xc80004
  67 #define CX18_DDR_REFRESH                0xc80008
  68 #define CX18_DDR_TIMING1                0xc8000C
  69 #define CX18_DDR_TIMING2                0xc80010
  70 #define CX18_DDR_POWER_REG              0xc8001C
  71
  72 #define CX18_DDR_TUNE_LANE              0xc80048
  73 #define CX18_DDR_INITIAL_EMRS           0xc80054
  74 #define CX18_DDR_MB_PER_ROW_7           0xc8009C
  75 #define CX18_DDR_BASE_63_ADDR           0xc804FC
  76
  77 #define CX18_WMB_CLIENT02               0xc90108
  78 #define CX18_WMB_CLIENT05               0xc90114
  79 #define CX18_WMB_CLIENT06               0xc90118
  80 #define CX18_WMB_CLIENT07               0xc9011C
  81 #define CX18_WMB_CLIENT08               0xc90120
  82 #define CX18_WMB_CLIENT09               0xc90124
  83 #define CX18_WMB_CLIENT10               0xc90128
  84 #define CX18_WMB_CLIENT11               0xc9012C
  85 #define CX18_WMB_CLIENT12               0xc90130
  86 #define CX18_WMB_CLIENT13               0xc90134
  87 #define CX18_WMB_CLIENT14               0xc90138
  88
  89 #define CX18_DSP0_INTERRUPT_MASK        0xd0004C
  90
  91 #define APU_ROM_SYNC1 0x6D676553 /* "mgeS" */
  92 #define APU_ROM_SYNC2 0x72646548 /* "rdeH" */
  93
  94 struct cx18_apu_rom_seghdr {
  95         u32 sync1;
  96         u32 sync2;
  97         u32 addr;
  98         u32 size;
  99 };
 100
 101 static int load_cpu_fw_direct(const char *fn, u8 __iomem *mem, struct cx18 *cx)
 102 {
 103         const struct firmware *fw = NULL;
 104         int i, j;
 105         unsigned size;
 106         u32 __iomem *dst = (u32 __iomem *)mem;
 107         const u32 *src;
 108
 109         if (request_firmware(&fw, fn, &cx->pci_dev->dev)) {
 110                 CX18_ERR("Unable to open firmware %s\n", fn);
 111                 CX18_ERR("Did you put the firmware in the hotplug firmware directory?\n");
 112                 return -ENOMEM;
 113         }
 114
 115         src = (const u32 *)fw->data;
 116
 117         for (i = 0; i < fw->size; i += 4096) {
 118                 cx18_setup_page(cx, i);
 119                 for (j = i; j < fw->size && j < i + 4096; j += 4) {
 120                         /* no need for endianness conversion on the ppc */
 121                         cx18_raw_writel(cx, *src, dst);
 122                         if (cx18_raw_readl(cx, dst) != *src) {
 123                                 CX18_ERR("Mismatch at offset %x\n", i);
 124                                 release_firmware(fw);
 125                                 cx18_setup_page(cx, 0);
 126                                 return -EIO;
 127                         }
 128                         dst++;
 129                         src++;
 130                 }
 131         }
 132         if (!test_bit(CX18_F_I_LOADED_FW, &cx->i_flags))
 133                 CX18_INFO("loaded %s firmware (%zd bytes)\n", fn, fw->size);
 134         size = fw->size;
 135         release_firmware(fw);
 136         cx18_setup_page(cx, SCB_OFFSET);
 137         return size;
 138 }
 139
 140 static int load_apu_fw_direct(const char *fn, u8 __iomem *dst, struct cx18 *cx,
 141                                 u32 *entry_addr)
 142 {
 143         const struct firmware *fw = NULL;
 144         int i, j;
 145         unsigned size;
 146         const u32 *src;
 147         struct cx18_apu_rom_seghdr seghdr;
 148         const u8 *vers;
 149         u32 offset = 0;
 150         u32 apu_version = 0;
 151         int sz;
 152
 153         if (request_firmware(&fw, fn, &cx->pci_dev->dev)) {
 154                 CX18_ERR("unable to open firmware %s\n", fn);
 155                 CX18_ERR("did you put the firmware in the hotplug firmware directory?\n");
 156                 cx18_setup_page(cx, 0);
 157                 return -ENOMEM;
 158         }
 159
 160         *entry_addr = 0;
 161         src = (const u32 *)fw->data;
 162         vers = fw->data + sizeof(seghdr);
 163         sz = fw->size;
 164
 165         apu_version = (vers[0] << 24) | (vers[4] << 16) | vers[32];
 166         while (offset + sizeof(seghdr) < fw->size) {
 167                 /* TODO: byteswapping */
 168                 memcpy(&seghdr, src + offset / 4, sizeof(seghdr));
 169                 offset += sizeof(seghdr);
 170                 if (seghdr.sync1 != APU_ROM_SYNC1 ||
 171                     seghdr.sync2 != APU_ROM_SYNC2) {
 172                         offset += seghdr.size;
 173                         continue;
 174                 }
 175                 CX18_DEBUG_INFO("load segment %x-%x\n", seghdr.addr,
 176                                 seghdr.addr + seghdr.size - 1);
 177                 if (*entry_addr == 0)
 178                         *entry_addr = seghdr.addr;
 179                 if (offset + seghdr.size > sz)
 180                         break;
 181                 for (i = 0; i < seghdr.size; i += 4096) {
 182                         cx18_setup_page(cx, seghdr.addr + i);
 183                         for (j = i; j < seghdr.size && j < i + 4096; j += 4) {
 184                                 /* no need for endianness conversion on the ppc */
 185                                 cx18_raw_writel(cx, src[(offset + j) / 4],
 186                                                 dst + seghdr.addr + j);
 187                                 if (cx18_raw_readl(cx, dst + seghdr.addr + j)
 188                                     != src[(offset + j) / 4]) {
 189                                         CX18_ERR("Mismatch at offset %x\n",
 190                                                  offset + j);
 191                                         release_firmware(fw);
 192                                         cx18_setup_page(cx, 0);
 193                                         return -EIO;
 194                                 }
 195                         }
 196                 }
 197                 offset += seghdr.size;
 198         }
 199         if (!test_bit(CX18_F_I_LOADED_FW, &cx->i_flags))
 200                 CX18_INFO("loaded %s firmware V%08x (%zd bytes)\n",
 201                                 fn, apu_version, fw->size);
 202         size = fw->size;
 203         release_firmware(fw);
 204         cx18_setup_page(cx, 0);
 205         return size;
 206 }
 207
 208 void cx18_halt_firmware(struct cx18 *cx)
 209 {
 210         CX18_DEBUG_INFO("Preparing for firmware halt.\n");
 211         cx18_write_reg_expect(cx, 0x000F000F, CX18_PROC_SOFT_RESET,
 212                                   0x0000000F, 0x000F000F);
 213         cx18_write_reg_expect(cx, 0x00020002, CX18_ADEC_CONTROL,
 214                                   0x00000002, 0x00020002);
 215 }
 216
 217 void cx18_init_power(struct cx18 *cx, int lowpwr)
 218 {
 219         /* power-down Spare and AOM PLLs */
 220         /* power-up fast, slow and mpeg PLLs */
 221         cx18_write_reg(cx, 0x00000008, CX18_PLL_POWER_DOWN);
 222
 223         /* ADEC out of sleep */
 224         cx18_write_reg_expect(cx, 0x00020000, CX18_ADEC_CONTROL,
 225                                   0x00000000, 0x00020002);
 226
 227         /*
 228          * The PLL parameters are based on the external crystal frequency that
 229          * would ideally be:
 230          *
 231          * NTSC Color subcarrier freq * 8 =
 232          *      4.5 MHz/286 * 455/2 * 8 = 28.63636363... MHz
 233          *
 234          * The accidents of history and rationale that explain from where this
 235          * combination of magic numbers originate can be found in:
 236          *
 237          * [1] Abrahams, I. C., "Choice of Chrominance Subcarrier Frequency in
 238          * the NTSC Standards", Proceedings of the I-R-E, January 1954, pp 79-80
 239          *
 240          * [2] Abrahams, I. C., "The 'Frequency Interleaving' Principle in the
 241          * NTSC Standards", Proceedings of the I-R-E, January 1954, pp 81-83
 242          *
 243          * As Mike Bradley has rightly pointed out, it's not the exact crystal
 244          * frequency that matters, only that all parts of the driver and
 245          * firmware are using the same value (close to the ideal value).
 246          *
 247          * Since I have a strong suspicion that, if the firmware ever assumes a
 248          * crystal value at all, it will assume 28.636360 MHz, the crystal
 249          * freq used in calculations in this driver will be:
 250          *
 251          *      xtal_freq = 28.636360 MHz
 252          *
 253          * an error of less than 0.13 ppm which is way, way better than any off
 254          * the shelf crystal will have for accuracy anyway.
 255          *
 256          * Below I aim to run the PLLs' VCOs near 400 MHz to minimze errors.
 257          *
 258          * Many thanks to Jeff Campbell and Mike Bradley for their extensive
 259          * investigation, experimentation, testing, and suggested solutions of
 260          * of audio/video sync problems with SVideo and CVBS captures.
 261          */
 262
 263         /* the fast clock is at 200/245 MHz */
 264         /* 1 * xtal_freq * 0x0d.f7df9b8 / 2 = 200 MHz: 400 MHz pre post-divide*/
 265         /* 1 * xtal_freq * 0x11.1c71eb8 / 2 = 245 MHz: 490 MHz pre post-divide*/
 266         cx18_write_reg(cx, lowpwr ? 0xD : 0x11, CX18_FAST_CLOCK_PLL_INT);
 267         cx18_write_reg(cx, lowpwr ? 0x1EFBF37 : 0x038E3D7,
 268                                                 CX18_FAST_CLOCK_PLL_FRAC);
 269
 270         cx18_write_reg(cx, 2, CX18_FAST_CLOCK_PLL_POST);
 271         cx18_write_reg(cx, 1, CX18_FAST_CLOCK_PLL_PRESCALE);
 272         cx18_write_reg(cx, 4, CX18_FAST_CLOCK_PLL_ADJUST_BANDWIDTH);
 273
 274         /* set slow clock to 125/120 MHz */
 275         /* xtal_freq * 0x0d.1861a20 / 3 = 125 MHz: 375 MHz before post-divide */
 276         /* xtal_freq * 0x0c.92493f8 / 3 = 120 MHz: 360 MHz before post-divide */
 277         cx18_write_reg(cx, lowpwr ? 0xD : 0xC, CX18_SLOW_CLOCK_PLL_INT);
 278         cx18_write_reg(cx, lowpwr ? 0x30C344 : 0x124927F,
 279                                                 CX18_SLOW_CLOCK_PLL_FRAC);
 280         cx18_write_reg(cx, 3, CX18_SLOW_CLOCK_PLL_POST);
 281
 282         /* mpeg clock pll 54MHz */
 283         /* xtal_freq * 0xf.15f17f0 / 8 = 54 MHz: 432 MHz before post-divide */
 284         cx18_write_reg(cx, 0xF, CX18_MPEG_CLOCK_PLL_INT);
 285         cx18_write_reg(cx, 0x2BE2FE, CX18_MPEG_CLOCK_PLL_FRAC);
 286         cx18_write_reg(cx, 8, CX18_MPEG_CLOCK_PLL_POST);
 287
 288         /* Defaults */
 289         /* APU = SC or SC/2 = 125/62.5 */
 290         /* EPU = SC = 125 */
 291         /* DDR = FC = 180 */
 292         /* ENC = SC = 125 */
 293         /* AI1 = SC = 125 */
 294         /* VIM2 = disabled */
 295         /* PCI = FC/2 = 90 */
 296         /* AI2 = disabled */
 297         /* DEMUX = disabled */
 298         /* AO = SC/2 = 62.5 */
 299         /* SER = 54MHz */
 300         /* VFC = disabled */
 301         /* USB = disabled */
 302
 303         if (lowpwr) {
 304                 cx18_write_reg_expect(cx, 0xFFFF0020, CX18_CLOCK_SELECT1,
 305                                           0x00000020, 0xFFFFFFFF);
 306                 cx18_write_reg_expect(cx, 0xFFFF0004, CX18_CLOCK_SELECT2,
 307                                           0x00000004, 0xFFFFFFFF);
 308         } else {
 309                 /* This doesn't explicitly set every clock select */
 310                 cx18_write_reg_expect(cx, 0x00060004, CX18_CLOCK_SELECT1,
 311                                           0x00000004, 0x00060006);
 312                 cx18_write_reg_expect(cx, 0x00060006, CX18_CLOCK_SELECT2,
 313                                           0x00000006, 0x00060006);
 314         }
 315
 316         cx18_write_reg_expect(cx, 0xFFFF0002, CX18_HALF_CLOCK_SELECT1,
 317                                   0x00000002, 0xFFFFFFFF);
 318         cx18_write_reg_expect(cx, 0xFFFF0104, CX18_HALF_CLOCK_SELECT2,
 319                                   0x00000104, 0xFFFFFFFF);
 320         cx18_write_reg_expect(cx, 0xFFFF9026, CX18_CLOCK_ENABLE1,
 321                                   0x00009026, 0xFFFFFFFF);
 322         cx18_write_reg_expect(cx, 0xFFFF3105, CX18_CLOCK_ENABLE2,
 323                                   0x00003105, 0xFFFFFFFF);
 324 }
 325
 326 void cx18_init_memory(struct cx18 *cx)
 327 {
 328         cx18_msleep_timeout(10, 0);
 329         cx18_write_reg_expect(cx, 0x00010000, CX18_DDR_SOFT_RESET,
 330                                   0x00000000, 0x00010001);
 331         cx18_msleep_timeout(10, 0);
 332
 333         cx18_write_reg(cx, cx->card->ddr.chip_config, CX18_DDR_CHIP_CONFIG);
 334
 335         cx18_msleep_timeout(10, 0);
 336
 337         cx18_write_reg(cx, cx->card->ddr.refresh, CX18_DDR_REFRESH);
 338         cx18_write_reg(cx, cx->card->ddr.timing1, CX18_DDR_TIMING1);
 339         cx18_write_reg(cx, cx->card->ddr.timing2, CX18_DDR_TIMING2);
 340
 341         cx18_msleep_timeout(10, 0);
 342
 343         /* Initialize DQS pad time */
 344         cx18_write_reg(cx, cx->card->ddr.tune_lane, CX18_DDR_TUNE_LANE);
 345         cx18_write_reg(cx, cx->card->ddr.initial_emrs, CX18_DDR_INITIAL_EMRS);
 346
 347         cx18_msleep_timeout(10, 0);
 348
 349         cx18_write_reg_expect(cx, 0x00020000, CX18_DDR_SOFT_RESET,
 350                                   0x00000000, 0x00020002);
 351         cx18_msleep_timeout(10, 0);
 352
 353         /* use power-down mode when idle */
 354         cx18_write_reg(cx, 0x00000010, CX18_DDR_POWER_REG);
 355
 356         cx18_write_reg_expect(cx, 0x00010001, CX18_REG_BUS_TIMEOUT_EN,
 357                                   0x00000001, 0x00010001);
 358
 359         cx18_write_reg(cx, 0x48, CX18_DDR_MB_PER_ROW_7);
 360         cx18_write_reg(cx, 0xE0000, CX18_DDR_BASE_63_ADDR);
 361
 362         cx18_write_reg(cx, 0x00000101, CX18_WMB_CLIENT02);  /* AO */
 363         cx18_write_reg(cx, 0x00000101, CX18_WMB_CLIENT09);  /* AI2 */
 364         cx18_write_reg(cx, 0x00000101, CX18_WMB_CLIENT05);  /* VIM1 */
 365         cx18_write_reg(cx, 0x00000101, CX18_WMB_CLIENT06);  /* AI1 */
 366         cx18_write_reg(cx, 0x00000101, CX18_WMB_CLIENT07);  /* 3D comb */
 367         cx18_write_reg(cx, 0x00000101, CX18_WMB_CLIENT10);  /* ME */
 368         cx18_write_reg(cx, 0x00000101, CX18_WMB_CLIENT12);  /* ENC */
 369         cx18_write_reg(cx, 0x00000101, CX18_WMB_CLIENT13);  /* PK */
 370         cx18_write_reg(cx, 0x00000101, CX18_WMB_CLIENT11);  /* RC */
 371         cx18_write_reg(cx, 0x00000101, CX18_WMB_CLIENT14);  /* AVO */
 372 }
 373
 374 int cx18_firmware_init(struct cx18 *cx)
 375 {
 376         u32 fw_entry_addr;
 377         int sz, retries;
 378         u32 api_args[MAX_MB_ARGUMENTS];
 379
 380         /* Allow chip to control CLKRUN */
 381         cx18_write_reg(cx, 0x5, CX18_DSP0_INTERRUPT_MASK);
 382
 383         /* Stop the firmware */
 384         cx18_write_reg_expect(cx, 0x000F000F, CX18_PROC_SOFT_RESET,
 385                                   0x0000000F, 0x000F000F);
 386
 387         cx18_msleep_timeout(1, 0);
 388
 389         /* If the CPU is still running */
 390         if ((cx18_read_reg(cx, CX18_PROC_SOFT_RESET) & 8) == 0) {
 391                 CX18_ERR("%s: couldn't stop CPU to load firmware\n", __func__);
 392                 return -EIO;
 393         }
 394
 395         cx18_sw1_irq_enable(cx, IRQ_CPU_TO_EPU | IRQ_APU_TO_EPU);
 396         cx18_sw2_irq_enable(cx, IRQ_CPU_TO_EPU_ACK | IRQ_APU_TO_EPU_ACK);
 397
 398         sz = load_cpu_fw_direct("v4l-cx23418-cpu.fw", cx->enc_mem, cx);
 399         if (sz <= 0)
 400                 return sz;
 401
 402         /* The SCB & IPC area *must* be correct before starting the firmwares */
 403         cx18_init_scb(cx);
 404
 405         fw_entry_addr = 0;
 406         sz = load_apu_fw_direct("v4l-cx23418-apu.fw", cx->enc_mem, cx,
 407                                 &fw_entry_addr);
 408         if (sz <= 0)
 409                 return sz;
 410
 411         /* Start the CPU. The CPU will take care of the APU for us. */
 412         cx18_write_reg_expect(cx, 0x00080000, CX18_PROC_SOFT_RESET,
 413                                   0x00000000, 0x00080008);
 414
 415         /* Wait up to 500 ms for the APU to come out of reset */
 416         for (retries = 0;
 417              retries < 50 && (cx18_read_reg(cx, CX18_PROC_SOFT_RESET) & 1) == 1;
 418              retries++)
 419                 cx18_msleep_timeout(10, 0);
 420
 421         cx18_msleep_timeout(200, 0);
 422
 423         if (retries == 50 &&
 424             (cx18_read_reg(cx, CX18_PROC_SOFT_RESET) & 1) == 1) {
 425                 CX18_ERR("Could not start the CPU\n");
 426                 return -EIO;
 427         }
 428
 429         /*
 430          * The CPU had once before set up to receive an interrupt for it's
 431          * outgoing IRQ_CPU_TO_EPU_ACK to us.  If it ever does this, we get an
 432          * interrupt when it sends us an ack, but by the time we process it,
 433          * that flag in the SW2 status register has been cleared by the CPU
 434          * firmware.  We'll prevent that not so useful condition from happening
 435          * by clearing the CPU's interrupt enables for Ack IRQ's we want to
 436          * process.
 437          */
 438         cx18_sw2_irq_disable_cpu(cx, IRQ_CPU_TO_EPU_ACK | IRQ_APU_TO_EPU_ACK);
 439
 440         /* Try a benign command to see if the CPU is alive and well */
 441         sz = cx18_vapi_result(cx, api_args, CX18_CPU_DEBUG_PEEK32, 1, 0);
 442         if (sz < 0)
 443                 return sz;
 444
 445         /* initialize GPIO */
 446         cx18_write_reg_expect(cx, 0x14001400, 0xc78110, 0x00001400, 0x14001400);
 447         return 0;
 448 }