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