drivers/video/fbdev/bfin_adv7393fb.c

   1 /*
   2  * Frame buffer driver for ADV7393/2 video encoder
   3  *
   4  * Copyright 2006-2009 Analog Devices Inc.
   5  * Licensed under the GPL-2 or late.
   6  */
   7
   8 /*
   9  * TODO: Remove Globals
  10  * TODO: Code Cleanup
  11  */
  12
  13 #define DRIVER_NAME "bfin-adv7393"
  14
  15 #define pr_fmt(fmt) DRIVER_NAME ": " fmt
  16
  17 #include <linux/module.h>
  18 #include <linux/kernel.h>
  19 #include <linux/errno.h>
  20 #include <linux/string.h>
  21 #include <linux/mm.h>
  22 #include <linux/tty.h>
  23 #include <linux/slab.h>
  24 #include <linux/delay.h>
  25 #include <linux/fb.h>
  26 #include <linux/ioport.h>
  27 #include <linux/init.h>
  28 #include <linux/types.h>
  29 #include <linux/interrupt.h>
  30 #include <linux/sched.h>
  31 #include <asm/blackfin.h>
  32 #include <asm/irq.h>
  33 #include <asm/dma.h>
  34 #include <linux/uaccess.h>
  35 #include <linux/gpio.h>
  36 #include <asm/portmux.h>
  37
  38 #include <linux/dma-mapping.h>
  39 #include <linux/proc_fs.h>
  40 #include <linux/platform_device.h>
  41 #include <linux/i2c.h>
  42
  43 #include "bfin_adv7393fb.h"
  44
  45 static int mode = VMODE;
  46 static int mem = VMEM;
  47 static int nocursor = 1;
  48
  49 static const unsigned short ppi_pins[] = {
  50         P_PPI0_CLK, P_PPI0_FS1, P_PPI0_FS2,
  51         P_PPI0_D0, P_PPI0_D1, P_PPI0_D2, P_PPI0_D3,
  52         P_PPI0_D4, P_PPI0_D5, P_PPI0_D6, P_PPI0_D7,
  53         P_PPI0_D8, P_PPI0_D9, P_PPI0_D10, P_PPI0_D11,
  54         P_PPI0_D12, P_PPI0_D13, P_PPI0_D14, P_PPI0_D15,
  55         0
  56 };
  57
  58 /*
  59  * card parameters
  60  */
  61
  62 static struct bfin_adv7393_fb_par {
  63         /* structure holding blackfin / adv7393 parameters when
  64            screen is blanked */
  65         struct {
  66                 u8 Mode;        /* ntsc/pal/? */
  67         } vga_state;
  68         atomic_t ref_count;
  69 } bfin_par;
  70
  71 /* --------------------------------------------------------------------- */
  72
  73 static struct fb_var_screeninfo bfin_adv7393_fb_defined = {
  74         .xres = 720,
  75         .yres = 480,
  76         .xres_virtual = 720,
  77         .yres_virtual = 480,
  78         .bits_per_pixel = 16,
  79         .activate = FB_ACTIVATE_TEST,
  80         .height = -1,
  81         .width = -1,
  82         .left_margin = 0,
  83         .right_margin = 0,
  84         .upper_margin = 0,
  85         .lower_margin = 0,
  86         .vmode = FB_VMODE_INTERLACED,
  87         .red = {11, 5, 0},
  88         .green = {5, 6, 0},
  89         .blue = {0, 5, 0},
  90         .transp = {0, 0, 0},
  91 };
  92
  93 static struct fb_fix_screeninfo bfin_adv7393_fb_fix = {
  94         .id = "BFIN ADV7393",
  95         .smem_len = 720 * 480 * 2,
  96         .type = FB_TYPE_PACKED_PIXELS,
  97         .visual = FB_VISUAL_TRUECOLOR,
  98         .xpanstep = 0,
  99         .ypanstep = 0,
 100         .line_length = 720 * 2,
 101         .accel = FB_ACCEL_NONE
 102 };
 103
 104 static struct fb_ops bfin_adv7393_fb_ops = {
 105         .owner = THIS_MODULE,
 106         .fb_open = bfin_adv7393_fb_open,
 107         .fb_release = bfin_adv7393_fb_release,
 108         .fb_check_var = bfin_adv7393_fb_check_var,
 109         .fb_pan_display = bfin_adv7393_fb_pan_display,
 110         .fb_blank = bfin_adv7393_fb_blank,
 111         .fb_fillrect = cfb_fillrect,
 112         .fb_copyarea = cfb_copyarea,
 113         .fb_imageblit = cfb_imageblit,
 114         .fb_cursor = bfin_adv7393_fb_cursor,
 115         .fb_setcolreg = bfin_adv7393_fb_setcolreg,
 116 };
 117
 118 static int dma_desc_list(struct adv7393fb_device *fbdev, u16 arg)
 119 {
 120         if (arg == BUILD) {     /* Build */
 121                 fbdev->vb1 = l1_data_sram_zalloc(sizeof(struct dmasg));
 122                 if (fbdev->vb1 == NULL)
 123                         goto error;
 124
 125                 fbdev->av1 = l1_data_sram_zalloc(sizeof(struct dmasg));
 126                 if (fbdev->av1 == NULL)
 127                         goto error;
 128
 129                 fbdev->vb2 = l1_data_sram_zalloc(sizeof(struct dmasg));
 130                 if (fbdev->vb2 == NULL)
 131                         goto error;
 132
 133                 fbdev->av2 = l1_data_sram_zalloc(sizeof(struct dmasg));
 134                 if (fbdev->av2 == NULL)
 135                         goto error;
 136
 137                 /* Build linked DMA descriptor list */
 138                 fbdev->vb1->next_desc_addr = fbdev->av1;
 139                 fbdev->av1->next_desc_addr = fbdev->vb2;
 140                 fbdev->vb2->next_desc_addr = fbdev->av2;
 141                 fbdev->av2->next_desc_addr = fbdev->vb1;
 142
 143                 /* Save list head */
 144                 fbdev->descriptor_list_head = fbdev->av2;
 145
 146                 /* Vertical Blanking Field 1 */
 147                 fbdev->vb1->start_addr = VB_DUMMY_MEMORY_SOURCE;
 148                 fbdev->vb1->cfg = DMA_CFG_VAL;
 149
 150                 fbdev->vb1->x_count =
 151                     fbdev->modes[mode].xres + fbdev->modes[mode].boeft_blank;
 152
 153                 fbdev->vb1->x_modify = 0;
 154                 fbdev->vb1->y_count = fbdev->modes[mode].vb1_lines;
 155                 fbdev->vb1->y_modify = 0;
 156
 157                 /* Active Video Field 1 */
 158
 159                 fbdev->av1->start_addr = (unsigned long)fbdev->fb_mem;
 160                 fbdev->av1->cfg = DMA_CFG_VAL;
 161                 fbdev->av1->x_count =
 162                     fbdev->modes[mode].xres + fbdev->modes[mode].boeft_blank;
 163                 fbdev->av1->x_modify = fbdev->modes[mode].bpp / 8;
 164                 fbdev->av1->y_count = fbdev->modes[mode].a_lines;
 165                 fbdev->av1->y_modify =
 166                     (fbdev->modes[mode].xres - fbdev->modes[mode].boeft_blank +
 167                      1) * (fbdev->modes[mode].bpp / 8);
 168
 169                 /* Vertical Blanking Field 2 */
 170
 171                 fbdev->vb2->start_addr = VB_DUMMY_MEMORY_SOURCE;
 172                 fbdev->vb2->cfg = DMA_CFG_VAL;
 173                 fbdev->vb2->x_count =
 174                     fbdev->modes[mode].xres + fbdev->modes[mode].boeft_blank;
 175
 176                 fbdev->vb2->x_modify = 0;
 177                 fbdev->vb2->y_count = fbdev->modes[mode].vb2_lines;
 178                 fbdev->vb2->y_modify = 0;
 179
 180                 /* Active Video Field 2 */
 181
 182                 fbdev->av2->start_addr =
 183                     (unsigned long)fbdev->fb_mem + fbdev->line_len;
 184
 185                 fbdev->av2->cfg = DMA_CFG_VAL;
 186
 187                 fbdev->av2->x_count =
 188                     fbdev->modes[mode].xres + fbdev->modes[mode].boeft_blank;
 189
 190                 fbdev->av2->x_modify = (fbdev->modes[mode].bpp / 8);
 191                 fbdev->av2->y_count = fbdev->modes[mode].a_lines;
 192
 193                 fbdev->av2->y_modify =
 194                     (fbdev->modes[mode].xres - fbdev->modes[mode].boeft_blank +
 195                      1) * (fbdev->modes[mode].bpp / 8);
 196
 197                 return 1;
 198         }
 199
 200 error:
 201         l1_data_sram_free(fbdev->vb1);
 202         l1_data_sram_free(fbdev->av1);
 203         l1_data_sram_free(fbdev->vb2);
 204         l1_data_sram_free(fbdev->av2);
 205
 206         return 0;
 207 }
 208
 209 static int bfin_config_dma(struct adv7393fb_device *fbdev)
 210 {
 211         BUG_ON(!(fbdev->fb_mem));
 212
 213         set_dma_x_count(CH_PPI, fbdev->descriptor_list_head->x_count);
 214         set_dma_x_modify(CH_PPI, fbdev->descriptor_list_head->x_modify);
 215         set_dma_y_count(CH_PPI, fbdev->descriptor_list_head->y_count);
 216         set_dma_y_modify(CH_PPI, fbdev->descriptor_list_head->y_modify);
 217         set_dma_start_addr(CH_PPI, fbdev->descriptor_list_head->start_addr);
 218         set_dma_next_desc_addr(CH_PPI,
 219                                fbdev->descriptor_list_head->next_desc_addr);
 220         set_dma_config(CH_PPI, fbdev->descriptor_list_head->cfg);
 221
 222         return 1;
 223 }
 224
 225 static void bfin_disable_dma(void)
 226 {
 227         bfin_write_DMA0_CONFIG(bfin_read_DMA0_CONFIG() & ~DMAEN);
 228 }
 229
 230 static void bfin_config_ppi(struct adv7393fb_device *fbdev)
 231 {
 232         if (ANOMALY_05000183) {
 233                 bfin_write_TIMER2_CONFIG(WDTH_CAP);
 234                 bfin_write_TIMER_ENABLE(TIMEN2);
 235         }
 236
 237         bfin_write_PPI_CONTROL(0x381E);
 238         bfin_write_PPI_FRAME(fbdev->modes[mode].tot_lines);
 239         bfin_write_PPI_COUNT(fbdev->modes[mode].xres +
 240                              fbdev->modes[mode].boeft_blank - 1);
 241         bfin_write_PPI_DELAY(fbdev->modes[mode].aoeft_blank - 1);
 242 }
 243
 244 static void bfin_enable_ppi(void)
 245 {
 246         bfin_write_PPI_CONTROL(bfin_read_PPI_CONTROL() | PORT_EN);
 247 }
 248
 249 static void bfin_disable_ppi(void)
 250 {
 251         bfin_write_PPI_CONTROL(bfin_read_PPI_CONTROL() & ~PORT_EN);
 252 }
 253
 254 static inline int adv7393_write(struct i2c_client *client, u8 reg, u8 value)
 255 {
 256         return i2c_smbus_write_byte_data(client, reg, value);
 257 }
 258
 259 static inline int adv7393_read(struct i2c_client *client, u8 reg)
 260 {
 261         return i2c_smbus_read_byte_data(client, reg);
 262 }
 263
 264 static int
 265 adv7393_write_block(struct i2c_client *client,
 266                     const u8 *data, unsigned int len)
 267 {
 268         int ret = -1;
 269         u8 reg;
 270
 271         while (len >= 2) {
 272                 reg = *data++;
 273                 ret = adv7393_write(client, reg, *data++);
 274                 if (ret < 0)
 275                         break;
 276                 len -= 2;
 277         }
 278
 279         return ret;
 280 }
 281
 282 static int adv7393_mode(struct i2c_client *client, u16 mode)
 283 {
 284         switch (mode) {
 285         case POWER_ON:          /* ADV7393 Sleep mode OFF */
 286                 adv7393_write(client, 0x00, 0x1E);
 287                 break;
 288         case POWER_DOWN:        /* ADV7393 Sleep mode ON */
 289                 adv7393_write(client, 0x00, 0x1F);
 290                 break;
 291         case BLANK_OFF:         /* Pixel Data Valid */
 292                 adv7393_write(client, 0x82, 0xCB);
 293                 break;
 294         case BLANK_ON:          /* Pixel Data Invalid */
 295                 adv7393_write(client, 0x82, 0x8B);
 296                 break;
 297         default:
 298                 return -EINVAL;
 299                 break;
 300         }
 301         return 0;
 302 }
 303
 304 static irqreturn_t ppi_irq_error(int irq, void *dev_id)
 305 {
 306
 307         struct adv7393fb_device *fbdev = (struct adv7393fb_device *)dev_id;
 308
 309         u16 status = bfin_read_PPI_STATUS();
 310
 311         pr_debug("%s: PPI Status = 0x%X\n", __func__, status);
 312
 313         if (status) {
 314                 bfin_disable_dma();     /* TODO: Check Sequence */
 315                 bfin_disable_ppi();
 316                 bfin_clear_PPI_STATUS();
 317                 bfin_config_dma(fbdev);
 318                 bfin_enable_ppi();
 319         }
 320
 321         return IRQ_HANDLED;
 322
 323 }
 324
 325 static int proc_output(char *buf)
 326 {
 327         char *p = buf;
 328
 329         p += sprintf(p,
 330                 "Usage:\n"
 331                 "echo 0x[REG][Value] > adv7393\n"
 332                 "example: echo 0x1234 >adv7393\n"
 333                 "writes 0x34 into Register 0x12\n");
 334
 335         return p - buf;
 336 }
 337
 338 static ssize_t
 339 adv7393_read_proc(struct file *file, char __user *buf,
 340                   size_t size, loff_t *ppos)
 341 {
 342         static const char message[] = "Usage:\n"
 343                 "echo 0x[REG][Value] > adv7393\n"
 344                 "example: echo 0x1234 >adv7393\n"
 345                 "writes 0x34 into Register 0x12\n";
 346         return simple_read_from_buffer(buf, size, ppos, message,
 347                                         sizeof(message));
 348 }
 349
 350 static ssize_t
 351 adv7393_write_proc(struct file *file, const char __user * buffer,
 352                    size_t count, loff_t *ppos)
 353 {
 354         struct adv7393fb_device *fbdev = PDE_DATA(file_inode(file));
 355         unsigned int val;
 356         int ret;
 357
 358         ret = kstrtouint_from_user(buffer, count, 0, &val);
 359         if (ret)
 360                 return -EFAULT;
 361
 362         adv7393_write(fbdev->client, val >> 8, val & 0xff);
 363
 364         return count;
 365 }
 366
 367 static const struct file_operations fops = {
 368         .read = adv7393_read_proc,
 369         .write = adv7393_write_proc,
 370         .llseek = default_llseek,
 371 };
 372
 373 static int bfin_adv7393_fb_probe(struct i2c_client *client,
 374                                  const struct i2c_device_id *id)
 375 {
 376         int ret = 0;
 377         struct proc_dir_entry *entry;
 378
 379         struct adv7393fb_device *fbdev = NULL;
 380
 381         if (mem > 2) {
 382                 dev_err(&client->dev, "mem out of allowed range [1;2]\n");
 383                 return -EINVAL;
 384         }
 385
 386         if (mode >= ARRAY_SIZE(known_modes)) {
 387                 dev_err(&client->dev, "mode %d: not supported", mode);
 388                 return -EFAULT;
 389         }
 390
 391         fbdev = kzalloc(sizeof(*fbdev), GFP_KERNEL);
 392         if (!fbdev) {
 393                 dev_err(&client->dev, "failed to allocate device private record");
 394                 return -ENOMEM;
 395         }
 396
 397         i2c_set_clientdata(client, fbdev);
 398
 399         fbdev->modes = known_modes;
 400         fbdev->client = client;
 401
 402         fbdev->fb_len =
 403             mem * fbdev->modes[mode].xres * fbdev->modes[mode].xres *
 404             (fbdev->modes[mode].bpp / 8);
 405
 406         fbdev->line_len =
 407             fbdev->modes[mode].xres * (fbdev->modes[mode].bpp / 8);
 408
 409         /* Workaround "PPI Does Not Start Properly In Specific Mode" */
 410         if (ANOMALY_05000400) {
 411                 ret = gpio_request_one(P_IDENT(P_PPI0_FS3), GPIOF_OUT_INIT_LOW,
 412                                         "PPI0_FS3");
 413                 if (ret) {
 414                         dev_err(&client->dev, "PPI0_FS3 GPIO request failed\n");
 415                         ret = -EBUSY;
 416                         goto free_fbdev;
 417                 }
 418         }
 419
 420         if (peripheral_request_list(ppi_pins, DRIVER_NAME)) {
 421                 dev_err(&client->dev, "requesting PPI peripheral failed\n");
 422                 ret = -EFAULT;
 423                 goto free_gpio;
 424         }
 425
 426         fbdev->fb_mem =
 427             dma_alloc_coherent(NULL, fbdev->fb_len, &fbdev->dma_handle,
 428                                GFP_KERNEL);
 429
 430         if (NULL == fbdev->fb_mem) {
 431                 dev_err(&client->dev, "couldn't allocate dma buffer (%d bytes)\n",
 432                        (u32) fbdev->fb_len);
 433                 ret = -ENOMEM;
 434                 goto free_ppi_pins;
 435         }
 436
 437         fbdev->info.screen_base = (void *)fbdev->fb_mem;
 438         bfin_adv7393_fb_fix.smem_start = (int)fbdev->fb_mem;
 439
 440         bfin_adv7393_fb_fix.smem_len = fbdev->fb_len;
 441         bfin_adv7393_fb_fix.line_length = fbdev->line_len;
 442
 443         if (mem > 1)
 444                 bfin_adv7393_fb_fix.ypanstep = 1;
 445
 446         bfin_adv7393_fb_defined.red.length = 5;
 447         bfin_adv7393_fb_defined.green.length = 6;
 448         bfin_adv7393_fb_defined.blue.length = 5;
 449
 450         bfin_adv7393_fb_defined.xres = fbdev->modes[mode].xres;
 451         bfin_adv7393_fb_defined.yres = fbdev->modes[mode].yres;
 452         bfin_adv7393_fb_defined.xres_virtual = fbdev->modes[mode].xres;
 453         bfin_adv7393_fb_defined.yres_virtual = mem * fbdev->modes[mode].yres;
 454         bfin_adv7393_fb_defined.bits_per_pixel = fbdev->modes[mode].bpp;
 455
 456         fbdev->info.fbops = &bfin_adv7393_fb_ops;
 457         fbdev->info.var = bfin_adv7393_fb_defined;
 458         fbdev->info.fix = bfin_adv7393_fb_fix;
 459         fbdev->info.par = &bfin_par;
 460         fbdev->info.flags = FBINFO_DEFAULT;
 461
 462         fbdev->info.pseudo_palette = kzalloc(sizeof(u32) * 16, GFP_KERNEL);
 463         if (!fbdev->info.pseudo_palette) {
 464                 dev_err(&client->dev, "failed to allocate pseudo_palette\n");
 465                 ret = -ENOMEM;
 466                 goto free_fb_mem;
 467         }
 468
 469         if (fb_alloc_cmap(&fbdev->info.cmap, BFIN_LCD_NBR_PALETTE_ENTRIES, 0) < 0) {
 470                 dev_err(&client->dev, "failed to allocate colormap (%d entries)\n",
 471                            BFIN_LCD_NBR_PALETTE_ENTRIES);
 472                 ret = -EFAULT;
 473                 goto free_palette;
 474         }
 475
 476         if (request_dma(CH_PPI, "BF5xx_PPI_DMA") < 0) {
 477                 dev_err(&client->dev, "unable to request PPI DMA\n");
 478                 ret = -EFAULT;
 479                 goto free_cmap;
 480         }
 481
 482         if (request_irq(IRQ_PPI_ERROR, ppi_irq_error, 0,
 483                         "PPI ERROR", fbdev) < 0) {
 484                 dev_err(&client->dev, "unable to request PPI ERROR IRQ\n");
 485                 ret = -EFAULT;
 486                 goto free_ch_ppi;
 487         }
 488
 489         fbdev->open = 0;
 490
 491         ret = adv7393_write_block(client, fbdev->modes[mode].adv7393_i2c_initd,
 492                                 fbdev->modes[mode].adv7393_i2c_initd_len);
 493
 494         if (ret) {
 495                 dev_err(&client->dev, "i2c attach: init error\n");
 496                 goto free_irq_ppi;
 497         }
 498
 499
 500         if (register_framebuffer(&fbdev->info) < 0) {
 501                 dev_err(&client->dev, "unable to register framebuffer\n");
 502                 ret = -EFAULT;
 503                 goto free_irq_ppi;
 504         }
 505
 506         dev_info(&client->dev, "fb%d: %s frame buffer device\n",
 507                fbdev->info.node, fbdev->info.fix.id);
 508         dev_info(&client->dev, "fb memory address : 0x%p\n", fbdev->fb_mem);
 509
 510         entry = proc_create_data("driver/adv7393", 0, NULL, &fops, fbdev);
 511         if (!entry) {
 512                 dev_err(&client->dev, "unable to create /proc entry\n");
 513                 ret = -EFAULT;
 514                 goto free_fb;
 515         }
 516         return 0;
 517
 518 free_fb:
 519         unregister_framebuffer(&fbdev->info);
 520 free_irq_ppi:
 521         free_irq(IRQ_PPI_ERROR, fbdev);
 522 free_ch_ppi:
 523         free_dma(CH_PPI);
 524 free_cmap:
 525         fb_dealloc_cmap(&fbdev->info.cmap);
 526 free_palette:
 527         kfree(fbdev->info.pseudo_palette);
 528 free_fb_mem:
 529         dma_free_coherent(NULL, fbdev->fb_len, fbdev->fb_mem,
 530                           fbdev->dma_handle);
 531 free_ppi_pins:
 532         peripheral_free_list(ppi_pins);
 533 free_gpio:
 534         if (ANOMALY_05000400)
 535                 gpio_free(P_IDENT(P_PPI0_FS3));
 536 free_fbdev:
 537         kfree(fbdev);
 538
 539         return ret;
 540 }
 541
 542 static int bfin_adv7393_fb_open(struct fb_info *info, int user)
 543 {
 544         struct adv7393fb_device *fbdev = to_adv7393fb_device(info);
 545
 546         fbdev->info.screen_base = (void *)fbdev->fb_mem;
 547         if (!fbdev->info.screen_base) {
 548                 dev_err(&fbdev->client->dev, "unable to map device\n");
 549                 return -ENOMEM;
 550         }
 551
 552         fbdev->open = 1;
 553         dma_desc_list(fbdev, BUILD);
 554         adv7393_mode(fbdev->client, BLANK_OFF);
 555         bfin_config_ppi(fbdev);
 556         bfin_config_dma(fbdev);
 557         bfin_enable_ppi();
 558
 559         return 0;
 560 }
 561
 562 static int bfin_adv7393_fb_release(struct fb_info *info, int user)
 563 {
 564         struct adv7393fb_device *fbdev = to_adv7393fb_device(info);
 565
 566         adv7393_mode(fbdev->client, BLANK_ON);
 567         bfin_disable_dma();
 568         bfin_disable_ppi();
 569         dma_desc_list(fbdev, DESTRUCT);
 570         fbdev->open = 0;
 571         return 0;
 572 }
 573
 574 static int
 575 bfin_adv7393_fb_check_var(struct fb_var_screeninfo *var, struct fb_info *info)
 576 {
 577
 578         switch (var->bits_per_pixel) {
 579         case 16:/* DIRECTCOLOUR, 64k */
 580                 var->red.offset = info->var.red.offset;
 581                 var->green.offset = info->var.green.offset;
 582                 var->blue.offset = info->var.blue.offset;
 583                 var->red.length = info->var.red.length;
 584                 var->green.length = info->var.green.length;
 585                 var->blue.length = info->var.blue.length;
 586                 var->transp.offset = 0;
 587                 var->transp.length = 0;
 588                 var->transp.msb_right = 0;
 589                 var->red.msb_right = 0;
 590                 var->green.msb_right = 0;
 591                 var->blue.msb_right = 0;
 592                 break;
 593         default:
 594                 pr_debug("%s: depth not supported: %u BPP\n", __func__,
 595                          var->bits_per_pixel);
 596                 return -EINVAL;
 597         }
 598
 599         if (info->var.xres != var->xres ||
 600             info->var.yres != var->yres ||
 601             info->var.xres_virtual != var->xres_virtual ||
 602             info->var.yres_virtual != var->yres_virtual) {
 603                 pr_debug("%s: Resolution not supported: X%u x Y%u\n",
 604                          __func__, var->xres, var->yres);
 605                 return -EINVAL;
 606         }
 607
 608         /*
 609          *  Memory limit
 610          */
 611
 612         if ((info->fix.line_length * var->yres_virtual) > info->fix.smem_len) {
 613                 pr_debug("%s: Memory Limit requested yres_virtual = %u\n",
 614                          __func__, var->yres_virtual);
 615                 return -ENOMEM;
 616         }
 617
 618         return 0;
 619 }
 620
 621 static int
 622 bfin_adv7393_fb_pan_display(struct fb_var_screeninfo *var, struct fb_info *info)
 623 {
 624         int dy;
 625         u32 dmaaddr;
 626         struct adv7393fb_device *fbdev = to_adv7393fb_device(info);
 627
 628         if (!var || !info)
 629                 return -EINVAL;
 630
 631         if (var->xoffset - info->var.xoffset) {
 632                 /* No support for X panning for now! */
 633                 return -EINVAL;
 634         }
 635         dy = var->yoffset - info->var.yoffset;
 636
 637         if (dy) {
 638                 pr_debug("%s: Panning screen of %d lines\n", __func__, dy);
 639
 640                 dmaaddr = fbdev->av1->start_addr;
 641                 dmaaddr += (info->fix.line_length * dy);
 642                 /* TODO: Wait for current frame to finished */
 643
 644                 fbdev->av1->start_addr = (unsigned long)dmaaddr;
 645                 fbdev->av2->start_addr = (unsigned long)dmaaddr + fbdev->line_len;
 646         }
 647
 648         return 0;
 649
 650 }
 651
 652 /* 0 unblank, 1 blank, 2 no vsync, 3 no hsync, 4 off */
 653 static int bfin_adv7393_fb_blank(int blank, struct fb_info *info)
 654 {
 655         struct adv7393fb_device *fbdev = to_adv7393fb_device(info);
 656
 657         switch (blank) {
 658
 659         case VESA_NO_BLANKING:
 660                 /* Turn on panel */
 661                 adv7393_mode(fbdev->client, BLANK_OFF);
 662                 break;
 663
 664         case VESA_VSYNC_SUSPEND:
 665         case VESA_HSYNC_SUSPEND:
 666         case VESA_POWERDOWN:
 667                 /* Turn off panel */
 668                 adv7393_mode(fbdev->client, BLANK_ON);
 669                 break;
 670
 671         default:
 672                 return -EINVAL;
 673                 break;
 674         }
 675         return 0;
 676 }
 677
 678 int bfin_adv7393_fb_cursor(struct fb_info *info, struct fb_cursor *cursor)
 679 {
 680         if (nocursor)
 681                 return 0;
 682         else
 683                 return -EINVAL; /* just to force soft_cursor() call */
 684 }
 685
 686 static int bfin_adv7393_fb_setcolreg(u_int regno, u_int red, u_int green,
 687                                      u_int blue, u_int transp,
 688                                      struct fb_info *info)
 689 {
 690         if (regno >= BFIN_LCD_NBR_PALETTE_ENTRIES)
 691                 return -EINVAL;
 692
 693         if (info->var.grayscale)
 694                 /* grayscale = 0.30*R + 0.59*G + 0.11*B */
 695                 red = green = blue = (red * 77 + green * 151 + blue * 28) >> 8;
 696
 697         if (info->fix.visual == FB_VISUAL_TRUECOLOR) {
 698                 u32 value;
 699                 /* Place color in the pseudopalette */
 700                 if (regno > 16)
 701                         return -EINVAL;
 702
 703                 red   >>= (16 - info->var.red.length);
 704                 green >>= (16 - info->var.green.length);
 705                 blue  >>= (16 - info->var.blue.length);
 706
 707                 value = (red   << info->var.red.offset) |
 708                         (green << info->var.green.offset)|
 709                         (blue  << info->var.blue.offset);
 710                 value &= 0xFFFF;
 711
 712                 ((u32 *) (info->pseudo_palette))[regno] = value;
 713         }
 714
 715         return 0;
 716 }
 717
 718 static int bfin_adv7393_fb_remove(struct i2c_client *client)
 719 {
 720         struct adv7393fb_device *fbdev = i2c_get_clientdata(client);
 721
 722         adv7393_mode(client, POWER_DOWN);
 723
 724         if (fbdev->fb_mem)
 725                 dma_free_coherent(NULL, fbdev->fb_len, fbdev->fb_mem, fbdev->dma_handle);
 726         free_dma(CH_PPI);
 727         free_irq(IRQ_PPI_ERROR, fbdev);
 728         unregister_framebuffer(&fbdev->info);
 729         remove_proc_entry("driver/adv7393", NULL);
 730         fb_dealloc_cmap(&fbdev->info.cmap);
 731         kfree(fbdev->info.pseudo_palette);
 732
 733         if (ANOMALY_05000400)
 734                 gpio_free(P_IDENT(P_PPI0_FS3)); /* FS3 */
 735         peripheral_free_list(ppi_pins);
 736         kfree(fbdev);
 737
 738         return 0;
 739 }
 740
 741 #ifdef CONFIG_PM
 742 static int bfin_adv7393_fb_suspend(struct device *dev)
 743 {
 744         struct adv7393fb_device *fbdev = dev_get_drvdata(dev);
 745
 746         if (fbdev->open) {
 747                 bfin_disable_dma();
 748                 bfin_disable_ppi();
 749                 dma_desc_list(fbdev, DESTRUCT);
 750         }
 751         adv7393_mode(fbdev->client, POWER_DOWN);
 752
 753         return 0;
 754 }
 755
 756 static int bfin_adv7393_fb_resume(struct device *dev)
 757 {
 758         struct adv7393fb_device *fbdev = dev_get_drvdata(dev);
 759
 760         adv7393_mode(fbdev->client, POWER_ON);
 761
 762         if (fbdev->open) {
 763                 dma_desc_list(fbdev, BUILD);
 764                 bfin_config_ppi(fbdev);
 765                 bfin_config_dma(fbdev);
 766                 bfin_enable_ppi();
 767         }
 768
 769         return 0;
 770 }
 771
 772 static const struct dev_pm_ops bfin_adv7393_dev_pm_ops = {
 773         .suspend = bfin_adv7393_fb_suspend,
 774         .resume  = bfin_adv7393_fb_resume,
 775 };
 776 #endif
 777
 778 static const struct i2c_device_id bfin_adv7393_id[] = {
 779         {DRIVER_NAME, 0},
 780         {}
 781 };
 782
 783 MODULE_DEVICE_TABLE(i2c, bfin_adv7393_id);
 784
 785 static struct i2c_driver bfin_adv7393_fb_driver = {
 786         .driver = {
 787                 .name = DRIVER_NAME,
 788 #ifdef CONFIG_PM
 789                 .pm   = &bfin_adv7393_dev_pm_ops,
 790 #endif
 791         },
 792         .probe = bfin_adv7393_fb_probe,
 793         .remove = bfin_adv7393_fb_remove,
 794         .id_table = bfin_adv7393_id,
 795 };
 796
 797 static int __init bfin_adv7393_fb_driver_init(void)
 798 {
 799 #if IS_ENABLED(CONFIG_I2C_BLACKFIN_TWI)
 800         request_module("i2c-bfin-twi");
 801 #else
 802         request_module("i2c-gpio");
 803 #endif
 804
 805         return i2c_add_driver(&bfin_adv7393_fb_driver);
 806 }
 807 module_init(bfin_adv7393_fb_driver_init);
 808
 809 static void __exit bfin_adv7393_fb_driver_cleanup(void)
 810 {
 811         i2c_del_driver(&bfin_adv7393_fb_driver);
 812 }
 813 module_exit(bfin_adv7393_fb_driver_cleanup);
 814
 815 MODULE_LICENSE("GPL");
 816 MODULE_AUTHOR("Michael Hennerich <hennerich@blackfin.uclinux.org>");
 817 MODULE_DESCRIPTION("Frame buffer driver for ADV7393/2 Video Encoder");
 818
 819 module_param(mode, int, 0);
 820 MODULE_PARM_DESC(mode,
 821         "Video Mode (0=NTSC,1=PAL,2=NTSC 640x480,3=PAL 640x480,4=NTSC YCbCr input,5=PAL YCbCr input)");
 822
 823 module_param(mem, int, 0);
 824 MODULE_PARM_DESC(mem,
 825         "Size of frame buffer memory 1=Single 2=Double Size (allows y-panning / frame stacking)");
 826
 827 module_param(nocursor, int, 0644);
 828 MODULE_PARM_DESC(nocursor, "cursor enable/disable");