drivers/media/platform/ti/davinci/vpss.c

   1 // SPDX-License-Identifier: GPL-2.0-or-later
   2 /*
   3  * Copyright (C) 2009 Texas Instruments.
   4  *
   5  * common vpss system module platform driver for all video drivers.
   6  */
   7 #include <linux/module.h>
   8 #include <linux/platform_device.h>
   9 #include <linux/io.h>
  10 #include <linux/pm_runtime.h>
  11 #include <linux/err.h>
  12
  13 #include <media/davinci/vpss.h>
  14
  15 MODULE_LICENSE("GPL");
  16 MODULE_DESCRIPTION("VPSS Driver");
  17 MODULE_AUTHOR("Texas Instruments");
  18
  19 /* DM644x defines */
  20 #define DM644X_SBL_PCR_VPSS             (4)
  21
  22 #define DM355_VPSSBL_INTSEL             0x10
  23 #define DM355_VPSSBL_EVTSEL             0x14
  24 /* vpss BL register offsets */
  25 #define DM355_VPSSBL_CCDCMUX            0x1c
  26 /* vpss CLK register offsets */
  27 #define DM355_VPSSCLK_CLKCTRL           0x04
  28 /* masks and shifts */
  29 #define VPSS_HSSISEL_SHIFT              4
  30 /*
  31  * VDINT0 - vpss_int0, VDINT1 - vpss_int1, H3A - vpss_int4,
  32  * IPIPE_INT1_SDR - vpss_int5
  33  */
  34 #define DM355_VPSSBL_INTSEL_DEFAULT     0xff83ff10
  35 /* VENCINT - vpss_int8 */
  36 #define DM355_VPSSBL_EVTSEL_DEFAULT     0x4
  37
  38 #define DM365_ISP5_PCCR                         0x04
  39 #define DM365_ISP5_PCCR_BL_CLK_ENABLE           BIT(0)
  40 #define DM365_ISP5_PCCR_ISIF_CLK_ENABLE         BIT(1)
  41 #define DM365_ISP5_PCCR_H3A_CLK_ENABLE          BIT(2)
  42 #define DM365_ISP5_PCCR_RSZ_CLK_ENABLE          BIT(3)
  43 #define DM365_ISP5_PCCR_IPIPE_CLK_ENABLE        BIT(4)
  44 #define DM365_ISP5_PCCR_IPIPEIF_CLK_ENABLE      BIT(5)
  45 #define DM365_ISP5_PCCR_RSV                     BIT(6)
  46
  47 #define DM365_ISP5_BCR                  0x08
  48 #define DM365_ISP5_BCR_ISIF_OUT_ENABLE  BIT(1)
  49
  50 #define DM365_ISP5_INTSEL1              0x10
  51 #define DM365_ISP5_INTSEL2              0x14
  52 #define DM365_ISP5_INTSEL3              0x18
  53 #define DM365_ISP5_CCDCMUX              0x20
  54 #define DM365_ISP5_PG_FRAME_SIZE        0x28
  55 #define DM365_VPBE_CLK_CTRL             0x00
  56
  57 #define VPSS_CLK_CTRL                   0x01c40044
  58 #define VPSS_CLK_CTRL_VENCCLKEN         BIT(3)
  59 #define VPSS_CLK_CTRL_DACCLKEN          BIT(4)
  60
  61 /*
  62  * vpss interrupts. VDINT0 - vpss_int0, VDINT1 - vpss_int1,
  63  * AF - vpss_int3
  64  */
  65 #define DM365_ISP5_INTSEL1_DEFAULT      0x0b1f0100
  66 /* AEW - vpss_int6, RSZ_INT_DMA - vpss_int5 */
  67 #define DM365_ISP5_INTSEL2_DEFAULT      0x1f0a0f1f
  68 /* VENC - vpss_int8 */
  69 #define DM365_ISP5_INTSEL3_DEFAULT      0x00000015
  70
  71 /* masks and shifts for DM365*/
  72 #define DM365_CCDC_PG_VD_POL_SHIFT      0
  73 #define DM365_CCDC_PG_HD_POL_SHIFT      1
  74
  75 #define CCD_SRC_SEL_MASK                (BIT_MASK(5) | BIT_MASK(4))
  76 #define CCD_SRC_SEL_SHIFT               4
  77
  78 /* Different SoC platforms supported by this driver */
  79 enum vpss_platform_type {
  80         DM644X,
  81         DM355,
  82         DM365,
  83 };
  84
  85 /*
  86  * vpss operations. Depends on platform. Not all functions are available
  87  * on all platforms. The api, first check if a function is available before
  88  * invoking it. In the probe, the function ptrs are initialized based on
  89  * vpss name. vpss name can be "dm355_vpss", "dm644x_vpss" etc.
  90  */
  91 struct vpss_hw_ops {
  92         /* enable clock */
  93         int (*enable_clock)(enum vpss_clock_sel clock_sel, int en);
  94         /* select input to ccdc */
  95         void (*select_ccdc_source)(enum vpss_ccdc_source_sel src_sel);
  96         /* clear wbl overflow bit */
  97         int (*clear_wbl_overflow)(enum vpss_wbl_sel wbl_sel);
  98         /* set sync polarity */
  99         void (*set_sync_pol)(struct vpss_sync_pol);
 100         /* set the PG_FRAME_SIZE register*/
 101         void (*set_pg_frame_size)(struct vpss_pg_frame_size);
 102         /* check and clear interrupt if occurred */
 103         int (*dma_complete_interrupt)(void);
 104 };
 105
 106 /* vpss configuration */
 107 struct vpss_oper_config {
 108         __iomem void *vpss_regs_base0;
 109         __iomem void *vpss_regs_base1;
 110         __iomem void *vpss_regs_base2;
 111         enum vpss_platform_type platform;
 112         spinlock_t vpss_lock;
 113         struct vpss_hw_ops hw_ops;
 114 };
 115
 116 static struct vpss_oper_config oper_cfg;
 117
 118 /* register access routines */
 119 static inline u32 bl_regr(u32 offset)
 120 {
 121         return __raw_readl(oper_cfg.vpss_regs_base0 + offset);
 122 }
 123
 124 static inline void bl_regw(u32 val, u32 offset)
 125 {
 126         __raw_writel(val, oper_cfg.vpss_regs_base0 + offset);
 127 }
 128
 129 static inline u32 vpss_regr(u32 offset)
 130 {
 131         return __raw_readl(oper_cfg.vpss_regs_base1 + offset);
 132 }
 133
 134 static inline void vpss_regw(u32 val, u32 offset)
 135 {
 136         __raw_writel(val, oper_cfg.vpss_regs_base1 + offset);
 137 }
 138
 139 /* For DM365 only */
 140 static inline u32 isp5_read(u32 offset)
 141 {
 142         return __raw_readl(oper_cfg.vpss_regs_base0 + offset);
 143 }
 144
 145 /* For DM365 only */
 146 static inline void isp5_write(u32 val, u32 offset)
 147 {
 148         __raw_writel(val, oper_cfg.vpss_regs_base0 + offset);
 149 }
 150
 151 static void dm365_select_ccdc_source(enum vpss_ccdc_source_sel src_sel)
 152 {
 153         u32 temp = isp5_read(DM365_ISP5_CCDCMUX) & ~CCD_SRC_SEL_MASK;
 154
 155         /* if we are using pattern generator, enable it */
 156         if (src_sel == VPSS_PGLPBK || src_sel == VPSS_CCDCPG)
 157                 temp |= 0x08;
 158
 159         temp |= (src_sel << CCD_SRC_SEL_SHIFT);
 160         isp5_write(temp, DM365_ISP5_CCDCMUX);
 161 }
 162
 163 static void dm355_select_ccdc_source(enum vpss_ccdc_source_sel src_sel)
 164 {
 165         bl_regw(src_sel << VPSS_HSSISEL_SHIFT, DM355_VPSSBL_CCDCMUX);
 166 }
 167
 168 int vpss_dma_complete_interrupt(void)
 169 {
 170         if (!oper_cfg.hw_ops.dma_complete_interrupt)
 171                 return 2;
 172         return oper_cfg.hw_ops.dma_complete_interrupt();
 173 }
 174 EXPORT_SYMBOL(vpss_dma_complete_interrupt);
 175
 176 int vpss_select_ccdc_source(enum vpss_ccdc_source_sel src_sel)
 177 {
 178         if (!oper_cfg.hw_ops.select_ccdc_source)
 179                 return -EINVAL;
 180
 181         oper_cfg.hw_ops.select_ccdc_source(src_sel);
 182         return 0;
 183 }
 184 EXPORT_SYMBOL(vpss_select_ccdc_source);
 185
 186 static int dm644x_clear_wbl_overflow(enum vpss_wbl_sel wbl_sel)
 187 {
 188         u32 mask = 1, val;
 189
 190         if (wbl_sel < VPSS_PCR_AEW_WBL_0 ||
 191             wbl_sel > VPSS_PCR_CCDC_WBL_O)
 192                 return -EINVAL;
 193
 194         /* writing a 0 clear the overflow */
 195         mask = ~(mask << wbl_sel);
 196         val = bl_regr(DM644X_SBL_PCR_VPSS) & mask;
 197         bl_regw(val, DM644X_SBL_PCR_VPSS);
 198         return 0;
 199 }
 200
 201 void vpss_set_sync_pol(struct vpss_sync_pol sync)
 202 {
 203         if (!oper_cfg.hw_ops.set_sync_pol)
 204                 return;
 205
 206         oper_cfg.hw_ops.set_sync_pol(sync);
 207 }
 208 EXPORT_SYMBOL(vpss_set_sync_pol);
 209
 210 int vpss_clear_wbl_overflow(enum vpss_wbl_sel wbl_sel)
 211 {
 212         if (!oper_cfg.hw_ops.clear_wbl_overflow)
 213                 return -EINVAL;
 214
 215         return oper_cfg.hw_ops.clear_wbl_overflow(wbl_sel);
 216 }
 217 EXPORT_SYMBOL(vpss_clear_wbl_overflow);
 218
 219 /*
 220  *  dm355_enable_clock - Enable VPSS Clock
 221  *  @clock_sel: Clock to be enabled/disabled
 222  *  @en: enable/disable flag
 223  *
 224  *  This is called to enable or disable a vpss clock
 225  */
 226 static int dm355_enable_clock(enum vpss_clock_sel clock_sel, int en)
 227 {
 228         unsigned long flags;
 229         u32 utemp, mask = 0x1, shift = 0;
 230
 231         switch (clock_sel) {
 232         case VPSS_VPBE_CLOCK:
 233                 /* nothing since lsb */
 234                 break;
 235         case VPSS_VENC_CLOCK_SEL:
 236                 shift = 2;
 237                 break;
 238         case VPSS_CFALD_CLOCK:
 239                 shift = 3;
 240                 break;
 241         case VPSS_H3A_CLOCK:
 242                 shift = 4;
 243                 break;
 244         case VPSS_IPIPE_CLOCK:
 245                 shift = 5;
 246                 break;
 247         case VPSS_CCDC_CLOCK:
 248                 shift = 6;
 249                 break;
 250         default:
 251                 printk(KERN_ERR "dm355_enable_clock: Invalid selector: %d\n",
 252                        clock_sel);
 253                 return -EINVAL;
 254         }
 255
 256         spin_lock_irqsave(&oper_cfg.vpss_lock, flags);
 257         utemp = vpss_regr(DM355_VPSSCLK_CLKCTRL);
 258         if (!en)
 259                 utemp &= ~(mask << shift);
 260         else
 261                 utemp |= (mask << shift);
 262
 263         vpss_regw(utemp, DM355_VPSSCLK_CLKCTRL);
 264         spin_unlock_irqrestore(&oper_cfg.vpss_lock, flags);
 265         return 0;
 266 }
 267
 268 static int dm365_enable_clock(enum vpss_clock_sel clock_sel, int en)
 269 {
 270         unsigned long flags;
 271         u32 utemp, mask = 0x1, shift = 0, offset = DM365_ISP5_PCCR;
 272         u32 (*read)(u32 offset) = isp5_read;
 273         void(*write)(u32 val, u32 offset) = isp5_write;
 274
 275         switch (clock_sel) {
 276         case VPSS_BL_CLOCK:
 277                 break;
 278         case VPSS_CCDC_CLOCK:
 279                 shift = 1;
 280                 break;
 281         case VPSS_H3A_CLOCK:
 282                 shift = 2;
 283                 break;
 284         case VPSS_RSZ_CLOCK:
 285                 shift = 3;
 286                 break;
 287         case VPSS_IPIPE_CLOCK:
 288                 shift = 4;
 289                 break;
 290         case VPSS_IPIPEIF_CLOCK:
 291                 shift = 5;
 292                 break;
 293         case VPSS_PCLK_INTERNAL:
 294                 shift = 6;
 295                 break;
 296         case VPSS_PSYNC_CLOCK_SEL:
 297                 shift = 7;
 298                 break;
 299         case VPSS_VPBE_CLOCK:
 300                 read = vpss_regr;
 301                 write = vpss_regw;
 302                 offset = DM365_VPBE_CLK_CTRL;
 303                 break;
 304         case VPSS_VENC_CLOCK_SEL:
 305                 shift = 2;
 306                 read = vpss_regr;
 307                 write = vpss_regw;
 308                 offset = DM365_VPBE_CLK_CTRL;
 309                 break;
 310         case VPSS_LDC_CLOCK:
 311                 shift = 3;
 312                 read = vpss_regr;
 313                 write = vpss_regw;
 314                 offset = DM365_VPBE_CLK_CTRL;
 315                 break;
 316         case VPSS_FDIF_CLOCK:
 317                 shift = 4;
 318                 read = vpss_regr;
 319                 write = vpss_regw;
 320                 offset = DM365_VPBE_CLK_CTRL;
 321                 break;
 322         case VPSS_OSD_CLOCK_SEL:
 323                 shift = 6;
 324                 read = vpss_regr;
 325                 write = vpss_regw;
 326                 offset = DM365_VPBE_CLK_CTRL;
 327                 break;
 328         case VPSS_LDC_CLOCK_SEL:
 329                 shift = 7;
 330                 read = vpss_regr;
 331                 write = vpss_regw;
 332                 offset = DM365_VPBE_CLK_CTRL;
 333                 break;
 334         default:
 335                 printk(KERN_ERR "dm365_enable_clock: Invalid selector: %d\n",
 336                        clock_sel);
 337                 return -1;
 338         }
 339
 340         spin_lock_irqsave(&oper_cfg.vpss_lock, flags);
 341         utemp = read(offset);
 342         if (!en) {
 343                 mask = ~mask;
 344                 utemp &= (mask << shift);
 345         } else
 346                 utemp |= (mask << shift);
 347
 348         write(utemp, offset);
 349         spin_unlock_irqrestore(&oper_cfg.vpss_lock, flags);
 350
 351         return 0;
 352 }
 353
 354 int vpss_enable_clock(enum vpss_clock_sel clock_sel, int en)
 355 {
 356         if (!oper_cfg.hw_ops.enable_clock)
 357                 return -EINVAL;
 358
 359         return oper_cfg.hw_ops.enable_clock(clock_sel, en);
 360 }
 361 EXPORT_SYMBOL(vpss_enable_clock);
 362
 363 void dm365_vpss_set_sync_pol(struct vpss_sync_pol sync)
 364 {
 365         int val = 0;
 366         val = isp5_read(DM365_ISP5_CCDCMUX);
 367
 368         val |= (sync.ccdpg_hdpol << DM365_CCDC_PG_HD_POL_SHIFT);
 369         val |= (sync.ccdpg_vdpol << DM365_CCDC_PG_VD_POL_SHIFT);
 370
 371         isp5_write(val, DM365_ISP5_CCDCMUX);
 372 }
 373 EXPORT_SYMBOL(dm365_vpss_set_sync_pol);
 374
 375 void vpss_set_pg_frame_size(struct vpss_pg_frame_size frame_size)
 376 {
 377         if (!oper_cfg.hw_ops.set_pg_frame_size)
 378                 return;
 379
 380         oper_cfg.hw_ops.set_pg_frame_size(frame_size);
 381 }
 382 EXPORT_SYMBOL(vpss_set_pg_frame_size);
 383
 384 void dm365_vpss_set_pg_frame_size(struct vpss_pg_frame_size frame_size)
 385 {
 386         int current_reg = ((frame_size.hlpfr >> 1) - 1) << 16;
 387
 388         current_reg |= (frame_size.pplen - 1);
 389         isp5_write(current_reg, DM365_ISP5_PG_FRAME_SIZE);
 390 }
 391 EXPORT_SYMBOL(dm365_vpss_set_pg_frame_size);
 392
 393 static int vpss_probe(struct platform_device *pdev)
 394 {
 395         char *platform_name;
 396
 397         if (!pdev->dev.platform_data) {
 398                 dev_err(&pdev->dev, "no platform data\n");
 399                 return -ENOENT;
 400         }
 401
 402         platform_name = pdev->dev.platform_data;
 403         if (!strcmp(platform_name, "dm355_vpss"))
 404                 oper_cfg.platform = DM355;
 405         else if (!strcmp(platform_name, "dm365_vpss"))
 406                 oper_cfg.platform = DM365;
 407         else if (!strcmp(platform_name, "dm644x_vpss"))
 408                 oper_cfg.platform = DM644X;
 409         else {
 410                 dev_err(&pdev->dev, "vpss driver not supported on this platform\n");
 411                 return -ENODEV;
 412         }
 413
 414         dev_info(&pdev->dev, "%s vpss probed\n", platform_name);
 415         oper_cfg.vpss_regs_base0 = devm_platform_ioremap_resource(pdev, 0);
 416         if (IS_ERR(oper_cfg.vpss_regs_base0))
 417                 return PTR_ERR(oper_cfg.vpss_regs_base0);
 418
 419         if (oper_cfg.platform == DM355 || oper_cfg.platform == DM365) {
 420                 oper_cfg.vpss_regs_base1 = devm_platform_ioremap_resource(pdev, 1);
 421                 if (IS_ERR(oper_cfg.vpss_regs_base1))
 422                         return PTR_ERR(oper_cfg.vpss_regs_base1);
 423         }
 424
 425         if (oper_cfg.platform == DM355) {
 426                 oper_cfg.hw_ops.enable_clock = dm355_enable_clock;
 427                 oper_cfg.hw_ops.select_ccdc_source = dm355_select_ccdc_source;
 428                 /* Setup vpss interrupts */
 429                 bl_regw(DM355_VPSSBL_INTSEL_DEFAULT, DM355_VPSSBL_INTSEL);
 430                 bl_regw(DM355_VPSSBL_EVTSEL_DEFAULT, DM355_VPSSBL_EVTSEL);
 431         } else if (oper_cfg.platform == DM365) {
 432                 oper_cfg.hw_ops.enable_clock = dm365_enable_clock;
 433                 oper_cfg.hw_ops.select_ccdc_source = dm365_select_ccdc_source;
 434                 /* Setup vpss interrupts */
 435                 isp5_write((isp5_read(DM365_ISP5_PCCR) |
 436                                       DM365_ISP5_PCCR_BL_CLK_ENABLE |
 437                                       DM365_ISP5_PCCR_ISIF_CLK_ENABLE |
 438                                       DM365_ISP5_PCCR_H3A_CLK_ENABLE |
 439                                       DM365_ISP5_PCCR_RSZ_CLK_ENABLE |
 440                                       DM365_ISP5_PCCR_IPIPE_CLK_ENABLE |
 441                                       DM365_ISP5_PCCR_IPIPEIF_CLK_ENABLE |
 442                                       DM365_ISP5_PCCR_RSV), DM365_ISP5_PCCR);
 443                 isp5_write((isp5_read(DM365_ISP5_BCR) |
 444                             DM365_ISP5_BCR_ISIF_OUT_ENABLE), DM365_ISP5_BCR);
 445                 isp5_write(DM365_ISP5_INTSEL1_DEFAULT, DM365_ISP5_INTSEL1);
 446                 isp5_write(DM365_ISP5_INTSEL2_DEFAULT, DM365_ISP5_INTSEL2);
 447                 isp5_write(DM365_ISP5_INTSEL3_DEFAULT, DM365_ISP5_INTSEL3);
 448         } else
 449                 oper_cfg.hw_ops.clear_wbl_overflow = dm644x_clear_wbl_overflow;
 450
 451         pm_runtime_enable(&pdev->dev);
 452
 453         pm_runtime_get(&pdev->dev);
 454
 455         spin_lock_init(&oper_cfg.vpss_lock);
 456         dev_info(&pdev->dev, "%s vpss probe success\n", platform_name);
 457
 458         return 0;
 459 }
 460
 461 static int vpss_remove(struct platform_device *pdev)
 462 {
 463         pm_runtime_disable(&pdev->dev);
 464         return 0;
 465 }
 466
 467 static int vpss_suspend(struct device *dev)
 468 {
 469         pm_runtime_put(dev);
 470         return 0;
 471 }
 472
 473 static int vpss_resume(struct device *dev)
 474 {
 475         pm_runtime_get(dev);
 476         return 0;
 477 }
 478
 479 static const struct dev_pm_ops vpss_pm_ops = {
 480         .suspend = vpss_suspend,
 481         .resume = vpss_resume,
 482 };
 483
 484 static struct platform_driver vpss_driver = {
 485         .driver = {
 486                 .name   = "vpss",
 487                 .pm = &vpss_pm_ops,
 488         },
 489         .remove = vpss_remove,
 490         .probe = vpss_probe,
 491 };
 492
 493 static void vpss_exit(void)
 494 {
 495         platform_driver_unregister(&vpss_driver);
 496         iounmap(oper_cfg.vpss_regs_base2);
 497         release_mem_region(VPSS_CLK_CTRL, 4);
 498 }
 499
 500 static int __init vpss_init(void)
 501 {
 502         int ret;
 503
 504         if (!request_mem_region(VPSS_CLK_CTRL, 4, "vpss_clock_control"))
 505                 return -EBUSY;
 506
 507         oper_cfg.vpss_regs_base2 = ioremap(VPSS_CLK_CTRL, 4);
 508         if (unlikely(!oper_cfg.vpss_regs_base2)) {
 509                 ret = -ENOMEM;
 510                 goto err_ioremap;
 511         }
 512
 513         writel(VPSS_CLK_CTRL_VENCCLKEN |
 514                VPSS_CLK_CTRL_DACCLKEN, oper_cfg.vpss_regs_base2);
 515
 516         ret = platform_driver_register(&vpss_driver);
 517         if (ret)
 518                 goto err_pd_register;
 519
 520         return 0;
 521
 522 err_pd_register:
 523         iounmap(oper_cfg.vpss_regs_base2);
 524 err_ioremap:
 525         release_mem_region(VPSS_CLK_CTRL, 4);
 526         return ret;
 527 }
 528 subsys_initcall(vpss_init);
 529 module_exit(vpss_exit);