drivers/media/platform/davinci/vpss.c

   1 /*
   2  * Copyright (C) 2009 Texas Instruments.
   3  *
   4  * This program is free software; you can redistribute it and/or modify
   5  * it under the terms of the GNU General Public License as published by
   6  * the Free Software Foundation; either version 2 of the License, or
   7  * (at your option) any later version.
   8  *
   9  * This program is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12  * GNU General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU General Public License
  15  * along with this program; if not, write to the Free Software
  16  * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  17  *
  18  * common vpss system module platform driver for all video drivers.
  19  */
  20 #include <linux/module.h>
  21 #include <linux/platform_device.h>
  22 #include <linux/io.h>
  23 #include <linux/pm_runtime.h>
  24
  25 #include <media/davinci/vpss.h>
  26
  27 MODULE_LICENSE("GPL");
  28 MODULE_DESCRIPTION("VPSS Driver");
  29 MODULE_AUTHOR("Texas Instruments");
  30
  31 /* DM644x defines */
  32 #define DM644X_SBL_PCR_VPSS             (4)
  33
  34 #define DM355_VPSSBL_INTSEL             0x10
  35 #define DM355_VPSSBL_EVTSEL             0x14
  36 /* vpss BL register offsets */
  37 #define DM355_VPSSBL_CCDCMUX            0x1c
  38 /* vpss CLK register offsets */
  39 #define DM355_VPSSCLK_CLKCTRL           0x04
  40 /* masks and shifts */
  41 #define VPSS_HSSISEL_SHIFT              4
  42 /*
  43  * VDINT0 - vpss_int0, VDINT1 - vpss_int1, H3A - vpss_int4,
  44  * IPIPE_INT1_SDR - vpss_int5
  45  */
  46 #define DM355_VPSSBL_INTSEL_DEFAULT     0xff83ff10
  47 /* VENCINT - vpss_int8 */
  48 #define DM355_VPSSBL_EVTSEL_DEFAULT     0x4
  49
  50 #define DM365_ISP5_PCCR                         0x04
  51 #define DM365_ISP5_PCCR_BL_CLK_ENABLE           BIT(0)
  52 #define DM365_ISP5_PCCR_ISIF_CLK_ENABLE         BIT(1)
  53 #define DM365_ISP5_PCCR_H3A_CLK_ENABLE          BIT(2)
  54 #define DM365_ISP5_PCCR_RSZ_CLK_ENABLE          BIT(3)
  55 #define DM365_ISP5_PCCR_IPIPE_CLK_ENABLE        BIT(4)
  56 #define DM365_ISP5_PCCR_IPIPEIF_CLK_ENABLE      BIT(5)
  57 #define DM365_ISP5_PCCR_RSV                     BIT(6)
  58
  59 #define DM365_ISP5_BCR                  0x08
  60 #define DM365_ISP5_BCR_ISIF_OUT_ENABLE  BIT(1)
  61
  62 #define DM365_ISP5_INTSEL1              0x10
  63 #define DM365_ISP5_INTSEL2              0x14
  64 #define DM365_ISP5_INTSEL3              0x18
  65 #define DM365_ISP5_CCDCMUX              0x20
  66 #define DM365_ISP5_PG_FRAME_SIZE        0x28
  67 #define DM365_VPBE_CLK_CTRL             0x00
  68
  69 #define VPSS_CLK_CTRL                   0x01c40044
  70 #define VPSS_CLK_CTRL_VENCCLKEN         BIT(3)
  71 #define VPSS_CLK_CTRL_DACCLKEN          BIT(4)
  72
  73 /*
  74  * vpss interrupts. VDINT0 - vpss_int0, VDINT1 - vpss_int1,
  75  * AF - vpss_int3
  76  */
  77 #define DM365_ISP5_INTSEL1_DEFAULT      0x0b1f0100
  78 /* AEW - vpss_int6, RSZ_INT_DMA - vpss_int5 */
  79 #define DM365_ISP5_INTSEL2_DEFAULT      0x1f0a0f1f
  80 /* VENC - vpss_int8 */
  81 #define DM365_ISP5_INTSEL3_DEFAULT      0x00000015
  82
  83 /* masks and shifts for DM365*/
  84 #define DM365_CCDC_PG_VD_POL_SHIFT      0
  85 #define DM365_CCDC_PG_HD_POL_SHIFT      1
  86
  87 #define CCD_SRC_SEL_MASK                (BIT_MASK(5) | BIT_MASK(4))
  88 #define CCD_SRC_SEL_SHIFT               4
  89
  90 /* Different SoC platforms supported by this driver */
  91 enum vpss_platform_type {
  92         DM644X,
  93         DM355,
  94         DM365,
  95 };
  96
  97 /*
  98  * vpss operations. Depends on platform. Not all functions are available
  99  * on all platforms. The api, first check if a function is available before
 100  * invoking it. In the probe, the function ptrs are initialized based on
 101  * vpss name. vpss name can be "dm355_vpss", "dm644x_vpss" etc.
 102  */
 103 struct vpss_hw_ops {
 104         /* enable clock */
 105         int (*enable_clock)(enum vpss_clock_sel clock_sel, int en);
 106         /* select input to ccdc */
 107         void (*select_ccdc_source)(enum vpss_ccdc_source_sel src_sel);
 108         /* clear wbl overflow bit */
 109         int (*clear_wbl_overflow)(enum vpss_wbl_sel wbl_sel);
 110         /* set sync polarity */
 111         void (*set_sync_pol)(struct vpss_sync_pol);
 112         /* set the PG_FRAME_SIZE register*/
 113         void (*set_pg_frame_size)(struct vpss_pg_frame_size);
 114         /* check and clear interrupt if occurred */
 115         int (*dma_complete_interrupt)(void);
 116 };
 117
 118 /* vpss configuration */
 119 struct vpss_oper_config {
 120         __iomem void *vpss_regs_base0;
 121         __iomem void *vpss_regs_base1;
 122         resource_size_t *vpss_regs_base2;
 123         enum vpss_platform_type platform;
 124         spinlock_t vpss_lock;
 125         struct vpss_hw_ops hw_ops;
 126 };
 127
 128 static struct vpss_oper_config oper_cfg;
 129
 130 /* register access routines */
 131 static inline u32 bl_regr(u32 offset)
 132 {
 133         return __raw_readl(oper_cfg.vpss_regs_base0 + offset);
 134 }
 135
 136 static inline void bl_regw(u32 val, u32 offset)
 137 {
 138         __raw_writel(val, oper_cfg.vpss_regs_base0 + offset);
 139 }
 140
 141 static inline u32 vpss_regr(u32 offset)
 142 {
 143         return __raw_readl(oper_cfg.vpss_regs_base1 + offset);
 144 }
 145
 146 static inline void vpss_regw(u32 val, u32 offset)
 147 {
 148         __raw_writel(val, oper_cfg.vpss_regs_base1 + offset);
 149 }
 150
 151 /* For DM365 only */
 152 static inline u32 isp5_read(u32 offset)
 153 {
 154         return __raw_readl(oper_cfg.vpss_regs_base0 + offset);
 155 }
 156
 157 /* For DM365 only */
 158 static inline void isp5_write(u32 val, u32 offset)
 159 {
 160         __raw_writel(val, oper_cfg.vpss_regs_base0 + offset);
 161 }
 162
 163 static void dm365_select_ccdc_source(enum vpss_ccdc_source_sel src_sel)
 164 {
 165         u32 temp = isp5_read(DM365_ISP5_CCDCMUX) & ~CCD_SRC_SEL_MASK;
 166
 167         /* if we are using pattern generator, enable it */
 168         if (src_sel == VPSS_PGLPBK || src_sel == VPSS_CCDCPG)
 169                 temp |= 0x08;
 170
 171         temp |= (src_sel << CCD_SRC_SEL_SHIFT);
 172         isp5_write(temp, DM365_ISP5_CCDCMUX);
 173 }
 174
 175 static void dm355_select_ccdc_source(enum vpss_ccdc_source_sel src_sel)
 176 {
 177         bl_regw(src_sel << VPSS_HSSISEL_SHIFT, DM355_VPSSBL_CCDCMUX);
 178 }
 179
 180 int vpss_dma_complete_interrupt(void)
 181 {
 182         if (!oper_cfg.hw_ops.dma_complete_interrupt)
 183                 return 2;
 184         return oper_cfg.hw_ops.dma_complete_interrupt();
 185 }
 186 EXPORT_SYMBOL(vpss_dma_complete_interrupt);
 187
 188 int vpss_select_ccdc_source(enum vpss_ccdc_source_sel src_sel)
 189 {
 190         if (!oper_cfg.hw_ops.select_ccdc_source)
 191                 return -EINVAL;
 192
 193         oper_cfg.hw_ops.select_ccdc_source(src_sel);
 194         return 0;
 195 }
 196 EXPORT_SYMBOL(vpss_select_ccdc_source);
 197
 198 static int dm644x_clear_wbl_overflow(enum vpss_wbl_sel wbl_sel)
 199 {
 200         u32 mask = 1, val;
 201
 202         if (wbl_sel < VPSS_PCR_AEW_WBL_0 ||
 203             wbl_sel > VPSS_PCR_CCDC_WBL_O)
 204                 return -EINVAL;
 205
 206         /* writing a 0 clear the overflow */
 207         mask = ~(mask << wbl_sel);
 208         val = bl_regr(DM644X_SBL_PCR_VPSS) & mask;
 209         bl_regw(val, DM644X_SBL_PCR_VPSS);
 210         return 0;
 211 }
 212
 213 void vpss_set_sync_pol(struct vpss_sync_pol sync)
 214 {
 215         if (!oper_cfg.hw_ops.set_sync_pol)
 216                 return;
 217
 218         oper_cfg.hw_ops.set_sync_pol(sync);
 219 }
 220 EXPORT_SYMBOL(vpss_set_sync_pol);
 221
 222 int vpss_clear_wbl_overflow(enum vpss_wbl_sel wbl_sel)
 223 {
 224         if (!oper_cfg.hw_ops.clear_wbl_overflow)
 225                 return -EINVAL;
 226
 227         return oper_cfg.hw_ops.clear_wbl_overflow(wbl_sel);
 228 }
 229 EXPORT_SYMBOL(vpss_clear_wbl_overflow);
 230
 231 /*
 232  *  dm355_enable_clock - Enable VPSS Clock
 233  *  @clock_sel: Clock to be enabled/disabled
 234  *  @en: enable/disable flag
 235  *
 236  *  This is called to enable or disable a vpss clock
 237  */
 238 static int dm355_enable_clock(enum vpss_clock_sel clock_sel, int en)
 239 {
 240         unsigned long flags;
 241         u32 utemp, mask = 0x1, shift = 0;
 242
 243         switch (clock_sel) {
 244         case VPSS_VPBE_CLOCK:
 245                 /* nothing since lsb */
 246                 break;
 247         case VPSS_VENC_CLOCK_SEL:
 248                 shift = 2;
 249                 break;
 250         case VPSS_CFALD_CLOCK:
 251                 shift = 3;
 252                 break;
 253         case VPSS_H3A_CLOCK:
 254                 shift = 4;
 255                 break;
 256         case VPSS_IPIPE_CLOCK:
 257                 shift = 5;
 258                 break;
 259         case VPSS_CCDC_CLOCK:
 260                 shift = 6;
 261                 break;
 262         default:
 263                 printk(KERN_ERR "dm355_enable_clock:"
 264                                 " Invalid selector: %d\n", clock_sel);
 265                 return -EINVAL;
 266         }
 267
 268         spin_lock_irqsave(&oper_cfg.vpss_lock, flags);
 269         utemp = vpss_regr(DM355_VPSSCLK_CLKCTRL);
 270         if (!en)
 271                 utemp &= ~(mask << shift);
 272         else
 273                 utemp |= (mask << shift);
 274
 275         vpss_regw(utemp, DM355_VPSSCLK_CLKCTRL);
 276         spin_unlock_irqrestore(&oper_cfg.vpss_lock, flags);
 277         return 0;
 278 }
 279
 280 static int dm365_enable_clock(enum vpss_clock_sel clock_sel, int en)
 281 {
 282         unsigned long flags;
 283         u32 utemp, mask = 0x1, shift = 0, offset = DM365_ISP5_PCCR;
 284         u32 (*read)(u32 offset) = isp5_read;
 285         void(*write)(u32 val, u32 offset) = isp5_write;
 286
 287         switch (clock_sel) {
 288         case VPSS_BL_CLOCK:
 289                 break;
 290         case VPSS_CCDC_CLOCK:
 291                 shift = 1;
 292                 break;
 293         case VPSS_H3A_CLOCK:
 294                 shift = 2;
 295                 break;
 296         case VPSS_RSZ_CLOCK:
 297                 shift = 3;
 298                 break;
 299         case VPSS_IPIPE_CLOCK:
 300                 shift = 4;
 301                 break;
 302         case VPSS_IPIPEIF_CLOCK:
 303                 shift = 5;
 304                 break;
 305         case VPSS_PCLK_INTERNAL:
 306                 shift = 6;
 307                 break;
 308         case VPSS_PSYNC_CLOCK_SEL:
 309                 shift = 7;
 310                 break;
 311         case VPSS_VPBE_CLOCK:
 312                 read = vpss_regr;
 313                 write = vpss_regw;
 314                 offset = DM365_VPBE_CLK_CTRL;
 315                 break;
 316         case VPSS_VENC_CLOCK_SEL:
 317                 shift = 2;
 318                 read = vpss_regr;
 319                 write = vpss_regw;
 320                 offset = DM365_VPBE_CLK_CTRL;
 321                 break;
 322         case VPSS_LDC_CLOCK:
 323                 shift = 3;
 324                 read = vpss_regr;
 325                 write = vpss_regw;
 326                 offset = DM365_VPBE_CLK_CTRL;
 327                 break;
 328         case VPSS_FDIF_CLOCK:
 329                 shift = 4;
 330                 read = vpss_regr;
 331                 write = vpss_regw;
 332                 offset = DM365_VPBE_CLK_CTRL;
 333                 break;
 334         case VPSS_OSD_CLOCK_SEL:
 335                 shift = 6;
 336                 read = vpss_regr;
 337                 write = vpss_regw;
 338                 offset = DM365_VPBE_CLK_CTRL;
 339                 break;
 340         case VPSS_LDC_CLOCK_SEL:
 341                 shift = 7;
 342                 read = vpss_regr;
 343                 write = vpss_regw;
 344                 offset = DM365_VPBE_CLK_CTRL;
 345                 break;
 346         default:
 347                 printk(KERN_ERR "dm365_enable_clock: Invalid selector: %d\n",
 348                        clock_sel);
 349                 return -1;
 350         }
 351
 352         spin_lock_irqsave(&oper_cfg.vpss_lock, flags);
 353         utemp = read(offset);
 354         if (!en) {
 355                 mask = ~mask;
 356                 utemp &= (mask << shift);
 357         } else
 358                 utemp |= (mask << shift);
 359
 360         write(utemp, offset);
 361         spin_unlock_irqrestore(&oper_cfg.vpss_lock, flags);
 362
 363         return 0;
 364 }
 365
 366 int vpss_enable_clock(enum vpss_clock_sel clock_sel, int en)
 367 {
 368         if (!oper_cfg.hw_ops.enable_clock)
 369                 return -EINVAL;
 370
 371         return oper_cfg.hw_ops.enable_clock(clock_sel, en);
 372 }
 373 EXPORT_SYMBOL(vpss_enable_clock);
 374
 375 void dm365_vpss_set_sync_pol(struct vpss_sync_pol sync)
 376 {
 377         int val = 0;
 378         val = isp5_read(DM365_ISP5_CCDCMUX);
 379
 380         val |= (sync.ccdpg_hdpol << DM365_CCDC_PG_HD_POL_SHIFT);
 381         val |= (sync.ccdpg_vdpol << DM365_CCDC_PG_VD_POL_SHIFT);
 382
 383         isp5_write(val, DM365_ISP5_CCDCMUX);
 384 }
 385 EXPORT_SYMBOL(dm365_vpss_set_sync_pol);
 386
 387 void vpss_set_pg_frame_size(struct vpss_pg_frame_size frame_size)
 388 {
 389         if (!oper_cfg.hw_ops.set_pg_frame_size)
 390                 return;
 391
 392         oper_cfg.hw_ops.set_pg_frame_size(frame_size);
 393 }
 394 EXPORT_SYMBOL(vpss_set_pg_frame_size);
 395
 396 void dm365_vpss_set_pg_frame_size(struct vpss_pg_frame_size frame_size)
 397 {
 398         int current_reg = ((frame_size.hlpfr >> 1) - 1) << 16;
 399
 400         current_reg |= (frame_size.pplen - 1);
 401         isp5_write(current_reg, DM365_ISP5_PG_FRAME_SIZE);
 402 }
 403 EXPORT_SYMBOL(dm365_vpss_set_pg_frame_size);
 404
 405 static int vpss_probe(struct platform_device *pdev)
 406 {
 407         struct resource         *r1, *r2;
 408         char *platform_name;
 409         int status;
 410
 411         if (!pdev->dev.platform_data) {
 412                 dev_err(&pdev->dev, "no platform data\n");
 413                 return -ENOENT;
 414         }
 415
 416         platform_name = pdev->dev.platform_data;
 417         if (!strcmp(platform_name, "dm355_vpss"))
 418                 oper_cfg.platform = DM355;
 419         else if (!strcmp(platform_name, "dm365_vpss"))
 420                 oper_cfg.platform = DM365;
 421         else if (!strcmp(platform_name, "dm644x_vpss"))
 422                 oper_cfg.platform = DM644X;
 423         else {
 424                 dev_err(&pdev->dev, "vpss driver not supported on"
 425                         " this platform\n");
 426                 return -ENODEV;
 427         }
 428
 429         dev_info(&pdev->dev, "%s vpss probed\n", platform_name);
 430         r1 = platform_get_resource(pdev, IORESOURCE_MEM, 0);
 431         if (!r1)
 432                 return -ENOENT;
 433
 434         r1 = request_mem_region(r1->start, resource_size(r1), r1->name);
 435         if (!r1)
 436                 return -EBUSY;
 437
 438         oper_cfg.vpss_regs_base0 = ioremap(r1->start, resource_size(r1));
 439         if (!oper_cfg.vpss_regs_base0) {
 440                 status = -EBUSY;
 441                 goto fail1;
 442         }
 443
 444         if (oper_cfg.platform == DM355 || oper_cfg.platform == DM365) {
 445                 r2 = platform_get_resource(pdev, IORESOURCE_MEM, 1);
 446                 if (!r2) {
 447                         status = -ENOENT;
 448                         goto fail2;
 449                 }
 450                 r2 = request_mem_region(r2->start, resource_size(r2), r2->name);
 451                 if (!r2) {
 452                         status = -EBUSY;
 453                         goto fail2;
 454                 }
 455
 456                 oper_cfg.vpss_regs_base1 = ioremap(r2->start,
 457                                                    resource_size(r2));
 458                 if (!oper_cfg.vpss_regs_base1) {
 459                         status = -EBUSY;
 460                         goto fail3;
 461                 }
 462         }
 463
 464         if (oper_cfg.platform == DM355) {
 465                 oper_cfg.hw_ops.enable_clock = dm355_enable_clock;
 466                 oper_cfg.hw_ops.select_ccdc_source = dm355_select_ccdc_source;
 467                 /* Setup vpss interrupts */
 468                 bl_regw(DM355_VPSSBL_INTSEL_DEFAULT, DM355_VPSSBL_INTSEL);
 469                 bl_regw(DM355_VPSSBL_EVTSEL_DEFAULT, DM355_VPSSBL_EVTSEL);
 470         } else if (oper_cfg.platform == DM365) {
 471                 oper_cfg.hw_ops.enable_clock = dm365_enable_clock;
 472                 oper_cfg.hw_ops.select_ccdc_source = dm365_select_ccdc_source;
 473                 /* Setup vpss interrupts */
 474                 isp5_write((isp5_read(DM365_ISP5_PCCR) |
 475                                       DM365_ISP5_PCCR_BL_CLK_ENABLE |
 476                                       DM365_ISP5_PCCR_ISIF_CLK_ENABLE |
 477                                       DM365_ISP5_PCCR_H3A_CLK_ENABLE |
 478                                       DM365_ISP5_PCCR_RSZ_CLK_ENABLE |
 479                                       DM365_ISP5_PCCR_IPIPE_CLK_ENABLE |
 480                                       DM365_ISP5_PCCR_IPIPEIF_CLK_ENABLE |
 481                                       DM365_ISP5_PCCR_RSV), DM365_ISP5_PCCR);
 482                 isp5_write((isp5_read(DM365_ISP5_BCR) |
 483                             DM365_ISP5_BCR_ISIF_OUT_ENABLE), DM365_ISP5_BCR);
 484                 isp5_write(DM365_ISP5_INTSEL1_DEFAULT, DM365_ISP5_INTSEL1);
 485                 isp5_write(DM365_ISP5_INTSEL2_DEFAULT, DM365_ISP5_INTSEL2);
 486                 isp5_write(DM365_ISP5_INTSEL3_DEFAULT, DM365_ISP5_INTSEL3);
 487         } else
 488                 oper_cfg.hw_ops.clear_wbl_overflow = dm644x_clear_wbl_overflow;
 489
 490         pm_runtime_enable(&pdev->dev);
 491
 492         pm_runtime_get(&pdev->dev);
 493
 494         spin_lock_init(&oper_cfg.vpss_lock);
 495         dev_info(&pdev->dev, "%s vpss probe success\n", platform_name);
 496         return 0;
 497
 498 fail3:
 499         release_mem_region(r2->start, resource_size(r2));
 500 fail2:
 501         iounmap(oper_cfg.vpss_regs_base0);
 502 fail1:
 503         release_mem_region(r1->start, resource_size(r1));
 504         return status;
 505 }
 506
 507 static int vpss_remove(struct platform_device *pdev)
 508 {
 509         struct resource         *res;
 510
 511         pm_runtime_disable(&pdev->dev);
 512         iounmap(oper_cfg.vpss_regs_base0);
 513         res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
 514         release_mem_region(res->start, resource_size(res));
 515         if (oper_cfg.platform == DM355 || oper_cfg.platform == DM365) {
 516                 iounmap(oper_cfg.vpss_regs_base1);
 517                 res = platform_get_resource(pdev, IORESOURCE_MEM, 1);
 518                 release_mem_region(res->start, resource_size(res));
 519         }
 520         return 0;
 521 }
 522
 523 static int vpss_suspend(struct device *dev)
 524 {
 525         pm_runtime_put(dev);
 526         return 0;
 527 }
 528
 529 static int vpss_resume(struct device *dev)
 530 {
 531         pm_runtime_get(dev);
 532         return 0;
 533 }
 534
 535 static const struct dev_pm_ops vpss_pm_ops = {
 536         .suspend = vpss_suspend,
 537         .resume = vpss_resume,
 538 };
 539
 540 static struct platform_driver vpss_driver = {
 541         .driver = {
 542                 .name   = "vpss",
 543                 .owner = THIS_MODULE,
 544                 .pm = &vpss_pm_ops,
 545         },
 546         .remove = vpss_remove,
 547         .probe = vpss_probe,
 548 };
 549
 550 static void vpss_exit(void)
 551 {
 552         iounmap(oper_cfg.vpss_regs_base2);
 553         release_mem_region(VPSS_CLK_CTRL, 4);
 554         platform_driver_unregister(&vpss_driver);
 555 }
 556
 557 static int __init vpss_init(void)
 558 {
 559         if (!request_mem_region(VPSS_CLK_CTRL, 4, "vpss_clock_control"))
 560                 return -EBUSY;
 561
 562         oper_cfg.vpss_regs_base2 = ioremap(VPSS_CLK_CTRL, 4);
 563         writel(VPSS_CLK_CTRL_VENCCLKEN |
 564                      VPSS_CLK_CTRL_DACCLKEN, oper_cfg.vpss_regs_base2);
 565
 566         return platform_driver_register(&vpss_driver);
 567 }
 568 subsys_initcall(vpss_init);
 569 module_exit(vpss_exit);