drivers/video/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 pr_fmt(fmt) DRIVER_NAME ": " fmt
  14
  15 #include <linux/module.h>
  16 #include <linux/kernel.h>
  17 #include <linux/errno.h>
  18 #include <linux/string.h>
  19 #include <linux/mm.h>
  20 #include <linux/tty.h>
  21 #include <linux/slab.h>
  22 #include <linux/delay.h>
  23 #include <linux/fb.h>
  24 #include <linux/ioport.h>
  25 #include <linux/init.h>
  26 #include <linux/types.h>
  27 #include <linux/interrupt.h>
  28 #include <linux/sched.h>
  29 #include <asm/blackfin.h>
  30 #include <asm/irq.h>
  31 #include <asm/dma.h>
  32 #include <linux/uaccess.h>
  33 #include <linux/gpio.h>
  34 #include <asm/portmux.h>
  35
  36 #include <linux/dma-mapping.h>
  37 #include <linux/proc_fs.h>
  38 #include <linux/platform_device.h>
  39 #include <linux/i2c.h>
  40
  41 #include "bfin_adv7393fb.h"
  42
  43 static int mode = VMODE;
  44 static int mem = VMEM;
  45 static int nocursor = 1;
  46
  47 static const unsigned short ppi_pins[] = {
  48         P_PPI0_CLK, P_PPI0_FS1, P_PPI0_FS2,
  49         P_PPI0_D0, P_PPI0_D1, P_PPI0_D2, P_PPI0_D3,
  50         P_PPI0_D4, P_PPI0_D5, P_PPI0_D6, P_PPI0_D7,
  51         P_PPI0_D8, P_PPI0_D9, P_PPI0_D10, P_PPI0_D11,
  52         P_PPI0_D12, P_PPI0_D13, P_PPI0_D14, P_PPI0_D15,
  53         0
  54 };
  55
  56 /*
  57  * card parameters
  58  */
  59
  60 static struct bfin_adv7393_fb_par {
  61         /* structure holding blackfin / adv7393 parameters when
  62            screen is blanked */
  63         struct {
  64                 u8 Mode;        /* ntsc/pal/? */
  65         } vga_state;
  66         atomic_t ref_count;
  67 } bfin_par;
  68
  69 /* --------------------------------------------------------------------- */
  70
  71 static struct fb_var_screeninfo bfin_adv7393_fb_defined = {
  72         .xres = 720,
  73         .yres = 480,
  74         .xres_virtual = 720,
  75         .yres_virtual = 480,
  76         .bits_per_pixel = 16,
  77         .activate = FB_ACTIVATE_TEST,
  78         .height = -1,
  79         .width = -1,
  80         .left_margin = 0,
  81         .right_margin = 0,
  82         .upper_margin = 0,
  83         .lower_margin = 0,
  84         .vmode = FB_VMODE_INTERLACED,
  85         .red = {11, 5, 0},
  86         .green = {5, 6, 0},
  87         .blue = {0, 5, 0},
  88         .transp = {0, 0, 0},
  89 };
  90
  91 static struct fb_fix_screeninfo bfin_adv7393_fb_fix = {
  92         .id = "BFIN ADV7393",
  93         .smem_len = 720 * 480 * 2,
  94         .type = FB_TYPE_PACKED_PIXELS,
  95         .visual = FB_VISUAL_TRUECOLOR,
  96         .xpanstep = 0,
  97         .ypanstep = 0,
  98         .line_length = 720 * 2,
  99         .accel = FB_ACCEL_NONE
 100 };
 101
 102 static struct fb_ops bfin_adv7393_fb_ops = {
 103         .owner = THIS_MODULE,
 104         .fb_open = bfin_adv7393_fb_open,
 105         .fb_release = bfin_adv7393_fb_release,
 106         .fb_check_var = bfin_adv7393_fb_check_var,
 107         .fb_pan_display = bfin_adv7393_fb_pan_display,
 108         .fb_blank = bfin_adv7393_fb_blank,
 109         .fb_fillrect = cfb_fillrect,
 110         .fb_copyarea = cfb_copyarea,
 111         .fb_imageblit = cfb_imageblit,
 112         .fb_cursor = bfin_adv7393_fb_cursor,
 113         .fb_setcolreg = bfin_adv7393_fb_setcolreg,
 114 };
 115
 116 static int dma_desc_list(struct adv7393fb_device *fbdev, u16 arg)
 117 {
 118         if (arg == BUILD) {     /* Build */
 119                 fbdev->vb1 = l1_data_sram_zalloc(sizeof(struct dmasg));
 120                 if (fbdev->vb1 == NULL)
 121                         goto error;
 122
 123                 fbdev->av1 = l1_data_sram_zalloc(sizeof(struct dmasg));
 124                 if (fbdev->av1 == NULL)
 125                         goto error;
 126
 127                 fbdev->vb2 = l1_data_sram_zalloc(sizeof(struct dmasg));
 128                 if (fbdev->vb2 == NULL)
 129                         goto error;
 130
 131                 fbdev->av2 = l1_data_sram_zalloc(sizeof(struct dmasg));
 132                 if (fbdev->av2 == NULL)
 133                         goto error;
 134
 135                 /* Build linked DMA descriptor list */
 136                 fbdev->vb1->next_desc_addr = fbdev->av1;
 137                 fbdev->av1->next_desc_addr = fbdev->vb2;
 138                 fbdev->vb2->next_desc_addr = fbdev->av2;
 139                 fbdev->av2->next_desc_addr = fbdev->vb1;
 140
 141                 /* Save list head */
 142                 fbdev->descriptor_list_head = fbdev->av2;
 143
 144                 /* Vertical Blanking Field 1 */
 145                 fbdev->vb1->start_addr = VB_DUMMY_MEMORY_SOURCE;
 146                 fbdev->vb1->cfg = DMA_CFG_VAL;
 147
 148                 fbdev->vb1->x_count =
 149                     fbdev->modes[mode].xres + fbdev->modes[mode].boeft_blank;
 150
 151                 fbdev->vb1->x_modify = 0;
 152                 fbdev->vb1->y_count = fbdev->modes[mode].vb1_lines;
 153                 fbdev->vb1->y_modify = 0;
 154
 155                 /* Active Video Field 1 */
 156
 157                 fbdev->av1->start_addr = (unsigned long)fbdev->fb_mem;
 158                 fbdev->av1->cfg = DMA_CFG_VAL;
 159                 fbdev->av1->x_count =
 160                     fbdev->modes[mode].xres + fbdev->modes[mode].boeft_blank;
 161                 fbdev->av1->x_modify = fbdev->modes[mode].bpp / 8;
 162                 fbdev->av1->y_count = fbdev->modes[mode].a_lines;
 163                 fbdev->av1->y_modify =
 164                     (fbdev->modes[mode].xres - fbdev->modes[mode].boeft_blank +
 165                      1) * (fbdev->modes[mode].bpp / 8);
 166
 167                 /* Vertical Blanking Field 2 */
 168
 169                 fbdev->vb2->start_addr = VB_DUMMY_MEMORY_SOURCE;
 170                 fbdev->vb2->cfg = DMA_CFG_VAL;
 171                 fbdev->vb2->x_count =
 172                     fbdev->modes[mode].xres + fbdev->modes[mode].boeft_blank;
 173
 174                 fbdev->vb2->x_modify = 0;
 175                 fbdev->vb2->y_count = fbdev->modes[mode].vb2_lines;
 176                 fbdev->vb2->y_modify = 0;
 177
 178                 /* Active Video Field 2 */
 179
 180                 fbdev->av2->start_addr =
 181                     (unsigned long)fbdev->fb_mem + fbdev->line_len;
 182
 183                 fbdev->av2->cfg = DMA_CFG_VAL;
 184
 185                 fbdev->av2->x_count =
 186                     fbdev->modes[mode].xres + fbdev->modes[mode].boeft_blank;
 187
 188                 fbdev->av2->x_modify = (fbdev->modes[mode].bpp / 8);
 189                 fbdev->av2->y_count = fbdev->modes[mode].a_lines;
 190
 191                 fbdev->av2->y_modify =
 192                     (fbdev->modes[mode].xres - fbdev->modes[mode].boeft_blank +
 193                      1) * (fbdev->modes[mode].bpp / 8);
 194
 195                 return 1;
 196         }
 197
 198 error:
 199         l1_data_sram_free(fbdev->vb1);
 200         l1_data_sram_free(fbdev->av1);
 201         l1_data_sram_free(fbdev->vb2);
 202         l1_data_sram_free(fbdev->av2);
 203
 204         return 0;
 205 }
 206
 207 static int bfin_config_dma(struct adv7393fb_device *fbdev)
 208 {
 209         BUG_ON(!(fbdev->fb_mem));
 210
 211         set_dma_x_count(CH_PPI, fbdev->descriptor_list_head->x_count);
 212         set_dma_x_modify(CH_PPI, fbdev->descriptor_list_head->x_modify);
 213         set_dma_y_count(CH_PPI, fbdev->descriptor_list_head->y_count);
 214         set_dma_y_modify(CH_PPI, fbdev->descriptor_list_head->y_modify);
 215         set_dma_start_addr(CH_PPI, fbdev->descriptor_list_head->start_addr);
 216         set_dma_next_desc_addr(CH_PPI,
 217                                fbdev->descriptor_list_head->next_desc_addr);
 218         set_dma_config(CH_PPI, fbdev->descriptor_list_head->cfg);
 219
 220         return 1;
 221 }
 222
 223 static void bfin_disable_dma(void)
 224 {
 225         bfin_write_DMA0_CONFIG(bfin_read_DMA0_CONFIG() & ~DMAEN);
 226 }
 227
 228 static void bfin_config_ppi(struct adv7393fb_device *fbdev)
 229 {
 230         if (ANOMALY_05000183) {
 231                 bfin_write_TIMER2_CONFIG(WDTH_CAP);
 232                 bfin_write_TIMER_ENABLE(TIMEN2);
 233         }
 234
 235         bfin_write_PPI_CONTROL(0x381E);
 236         bfin_write_PPI_FRAME(fbdev->modes[mode].tot_lines);
 237         bfin_write_PPI_COUNT(fbdev->modes[mode].xres +
 238                              fbdev->modes[mode].boeft_blank - 1);
 239         bfin_write_PPI_DELAY(fbdev->modes[mode].aoeft_blank - 1);
 240 }
 241
 242 static void bfin_enable_ppi(void)
 243 {
 244         bfin_write_PPI_CONTROL(bfin_read_PPI_CONTROL() | PORT_EN);
 245 }
 246
 247 static void bfin_disable_ppi(void)
 248 {
 249         bfin_write_PPI_CONTROL(bfin_read_PPI_CONTROL() & ~PORT_EN);
 250 }
 251
 252 static inline int adv7393_write(struct i2c_client *client, u8 reg, u8 value)
 253 {
 254         return i2c_smbus_write_byte_data(client, reg, value);
 255 }
 256
 257 static inline int adv7393_read(struct i2c_client *client, u8 reg)
 258 {
 259         return i2c_smbus_read_byte_data(client, reg);
 260 }
 261
 262 static int
 263 adv7393_write_block(struct i2c_client *client,
 264                     const u8 *data, unsigned int len)
 265 {
 266         int ret = -1;
 267         u8 reg;
 268
 269         while (len >= 2) {
 270                 reg = *data++;
 271                 ret = adv7393_write(client, reg, *data++);
 272                 if (ret < 0)
 273                         break;
 274                 len -= 2;
 275         }
 276
 277         return ret;
 278 }
 279
 280 static int adv7393_mode(struct i2c_client *client, u16 mode)
 281 {
 282         switch (mode) {
 283         case POWER_ON:          /* ADV7393 Sleep mode OFF */
 284                 adv7393_write(client, 0x00, 0x1E);
 285                 break;
 286         case POWER_DOWN:        /* ADV7393 Sleep mode ON */
 287                 adv7393_write(client, 0x00, 0x1F);
 288                 break;
 289         case BLANK_OFF:         /* Pixel Data Valid */
 290                 adv7393_write(client, 0x82, 0xCB);
 291                 break;
 292         case BLANK_ON:          /* Pixel Data Invalid */
 293                 adv7393_write(client, 0x82, 0x8B);
 294                 break;
 295         default:
 296                 return -EINVAL;
 297                 break;
 298         }
 299         return 0;
 300 }
 301
 302 static irqreturn_t ppi_irq_error(int irq, void *dev_id)
 303 {
 304
 305         struct adv7393fb_device *fbdev = (struct adv7393fb_device *)dev_id;
 306
 307         u16 status = bfin_read_PPI_STATUS();
 308
 309         pr_debug("%s: PPI Status = 0x%X\n", __func__, status);
 310
 311         if (status) {
 312                 bfin_disable_dma();     /* TODO: Check Sequence */
 313                 bfin_disable_ppi();
 314                 bfin_clear_PPI_STATUS();
 315                 bfin_config_dma(fbdev);
 316                 bfin_enable_ppi();
 317         }
 318
 319         return IRQ_HANDLED;
 320
 321 }
 322
 323 static int proc_output(char *buf)
 324 {
 325         char *p = buf;
 326
 327         p += sprintf(p,
 328                 "Usage:\n"
 329                 "echo 0x[REG][Value] > adv7393\n"
 330                 "example: echo 0x1234 >adv7393\n"
 331                 "writes 0x34 into Register 0x12\n");
 332
 333         return p - buf;
 334 }
 335
 336 static ssize_t
 337 adv7393_read_proc(struct file *file, char __user *buf,
 338                   size_t size, loff_t *ppos)
 339 {
 340         static const char message[] = "Usage:\n"
 341                 "echo 0x[REG][Value] > adv7393\n"
 342                 "example: echo 0x1234 >adv7393\n"
 343                 "writes 0x34 into Register 0x12\n";
 344         return simple_read_from_buffer(buf, size, ppos, message,
 345                                         sizeof(message));
 346 }
 347
 348 static ssize_t
 349 adv7393_write_proc(struct file *file, const char __user * buffer,
 350                    size_t count, loff_t *ppos)
 351 {
 352         struct adv7393fb_device *fbdev = PDE_DATA(file_inode(file));
 353         unsigned int val;
 354         int ret;
 355
 356         ret = kstrtouint_from_user(buffer, count, 0, &val);
 357         if (ret)
 358                 return -EFAULT;
 359
 360         adv7393_write(fbdev->client, val >> 8, val & 0xff);
 361
 362         return count;
 363 }
 364
 365 static const struct file_operations fops = {
 366         .read = adv7393_read_proc,
 367         .write = adv7393_write_proc,
 368         .llseek = default_llseek,
 369 };
 370
 371 static int bfin_adv7393_fb_probe(struct i2c_client *client,
 372                                  const struct i2c_device_id *id)
 373 {
 374         int ret = 0;
 375         struct proc_dir_entry *entry;
 376         int num_modes = ARRAY_SIZE(known_modes);
 377
 378         struct adv7393fb_device *fbdev = NULL;
 379
 380         if (mem > 2) {
 381                 dev_err(&client->dev, "mem out of allowed range [1;2]\n");
 382                 return -EINVAL;
 383         }
 384
 385         if (mode > num_modes) {
 386                 dev_err(&client->dev, "mode %d: not supported", mode);
 387                 return -EFAULT;
 388         }
 389
 390         fbdev = kzalloc(sizeof(*fbdev), GFP_KERNEL);
 391         if (!fbdev) {
 392                 dev_err(&client->dev, "failed to allocate device private record");
 393                 return -ENOMEM;
 394         }
 395
 396         i2c_set_clientdata(client, fbdev);
 397
 398         fbdev->modes = known_modes;
 399         fbdev->client = client;
 400
 401         fbdev->fb_len =
 402             mem * fbdev->modes[mode].xres * fbdev->modes[mode].xres *
 403             (fbdev->modes[mode].bpp / 8);
 404
 405         fbdev->line_len =
 406             fbdev->modes[mode].xres * (fbdev->modes[mode].bpp / 8);
 407
 408         /* Workaround "PPI Does Not Start Properly In Specific Mode" */
 409         if (ANOMALY_05000400) {
 410                 ret = gpio_request_one(P_IDENT(P_PPI0_FS3), GPIOF_OUT_INIT_LOW,
 411                                         "PPI0_FS3")
 412                 if (ret) {
 413                         dev_err(&client->dev, "PPI0_FS3 GPIO request failed\n");
 414                         ret = -EBUSY;
 415                         goto free_fbdev;
 416                 }
 417         }
 418
 419         if (peripheral_request_list(ppi_pins, DRIVER_NAME)) {
 420                 dev_err(&client->dev, "requesting PPI peripheral failed\n");
 421                 ret = -EFAULT;
 422                 goto free_gpio;
 423         }
 424
 425         fbdev->fb_mem =
 426             dma_alloc_coherent(NULL, fbdev->fb_len, &fbdev->dma_handle,
 427                                GFP_KERNEL);
 428
 429         if (NULL == fbdev->fb_mem) {
 430                 dev_err(&client->dev, "couldn't allocate dma buffer (%d bytes)\n",
 431                        (u32) fbdev->fb_len);
 432                 ret = -ENOMEM;
 433                 goto free_ppi_pins;
 434         }
 435
 436         fbdev->info.screen_base = (void *)fbdev->fb_mem;
 437         bfin_adv7393_fb_fix.smem_start = (int)fbdev->fb_mem;
 438
 439         bfin_adv7393_fb_fix.smem_len = fbdev->fb_len;
 440         bfin_adv7393_fb_fix.line_length = fbdev->line_len;
 441
 442         if (mem > 1)
 443                 bfin_adv7393_fb_fix.ypanstep = 1;
 444
 445         bfin_adv7393_fb_defined.red.length = 5;
 446         bfin_adv7393_fb_defined.green.length = 6;
 447         bfin_adv7393_fb_defined.blue.length = 5;
 448
 449         bfin_adv7393_fb_defined.xres = fbdev->modes[mode].xres;
 450         bfin_adv7393_fb_defined.yres = fbdev->modes[mode].yres;
 451         bfin_adv7393_fb_defined.xres_virtual = fbdev->modes[mode].xres;
 452         bfin_adv7393_fb_defined.yres_virtual = mem * fbdev->modes[mode].yres;
 453         bfin_adv7393_fb_defined.bits_per_pixel = fbdev->modes[mode].bpp;
 454
 455         fbdev->info.fbops = &bfin_adv7393_fb_ops;
 456         fbdev->info.var = bfin_adv7393_fb_defined;
 457         fbdev->info.fix = bfin_adv7393_fb_fix;
 458         fbdev->info.par = &bfin_par;
 459         fbdev->info.flags = FBINFO_DEFAULT;
 460
 461         fbdev->info.pseudo_palette = kzalloc(sizeof(u32) * 16, GFP_KERNEL);
 462         if (!fbdev->info.pseudo_palette) {
 463                 dev_err(&client->dev, "failed to allocate pseudo_palette\n");
 464                 ret = -ENOMEM;
 465                 goto free_fb_mem;
 466         }
 467
 468         if (fb_alloc_cmap(&fbdev->info.cmap, BFIN_LCD_NBR_PALETTE_ENTRIES, 0) < 0) {
 469                 dev_err(&client->dev, "failed to allocate colormap (%d entries)\n",
 470                            BFIN_LCD_NBR_PALETTE_ENTRIES);
 471                 ret = -EFAULT;
 472                 goto free_palette;
 473         }
 474
 475         if (request_dma(CH_PPI, "BF5xx_PPI_DMA") < 0) {
 476                 dev_err(&client->dev, "unable to request PPI DMA\n");
 477                 ret = -EFAULT;
 478                 goto free_cmap;
 479         }
 480
 481         if (request_irq(IRQ_PPI_ERROR, ppi_irq_error, 0,
 482                         "PPI ERROR", fbdev) < 0) {
 483                 dev_err(&client->dev, "unable to request PPI ERROR IRQ\n");
 484                 ret = -EFAULT;
 485                 goto free_ch_ppi;
 486         }
 487
 488         fbdev->open = 0;
 489
 490         ret = adv7393_write_block(client, fbdev->modes[mode].adv7393_i2c_initd,
 491                                 fbdev->modes[mode].adv7393_i2c_initd_len);
 492
 493         if (ret) {
 494                 dev_err(&client->dev, "i2c attach: init error\n");
 495                 goto free_irq_ppi;
 496         }
 497
 498
 499         if (register_framebuffer(&fbdev->info) < 0) {
 500                 dev_err(&client->dev, "unable to register framebuffer\n");
 501                 ret = -EFAULT;
 502                 goto free_irq_ppi;
 503         }
 504
 505         dev_info(&client->dev, "fb%d: %s frame buffer device\n",
 506                fbdev->info.node, fbdev->info.fix.id);
 507         dev_info(&client->dev, "fb memory address : 0x%p\n", fbdev->fb_mem);
 508
 509         entry = proc_create_data("driver/adv7393", 0, NULL, &fops, fbdev);
 510         if (!entry) {
 511                 dev_err(&client->dev, "unable to create /proc entry\n");
 512                 ret = -EFAULT;
 513                 goto free_fb;
 514         }
 515         return 0;
 516
 517 free_fb:
 518         unregister_framebuffer(&fbdev->info);
 519 free_irq_ppi:
 520         free_irq(IRQ_PPI_ERROR, fbdev);
 521 free_ch_ppi:
 522         free_dma(CH_PPI);
 523 free_cmap:
 524         fb_dealloc_cmap(&fbdev->info.cmap);
 525 free_palette:
 526         kfree(fbdev->info.pseudo_palette);
 527 free_fb_mem:
 528         dma_free_coherent(NULL, fbdev->fb_len, fbdev->fb_mem,
 529                           fbdev->dma_handle);
 530 free_ppi_pins:
 531         peripheral_free_list(ppi_pins);
 532 free_gpio:
 533         if (ANOMALY_05000400)
 534                 gpio_free(P_IDENT(P_PPI0_FS3));
 535 free_fbdev:
 536         kfree(fbdev);
 537
 538         return ret;
 539 }
 540
 541 static int bfin_adv7393_fb_open(struct fb_info *info, int user)
 542 {
 543         struct adv7393fb_device *fbdev = to_adv7393fb_device(info);
 544
 545         fbdev->info.screen_base = (void *)fbdev->fb_mem;
 546         if (!fbdev->info.screen_base) {
 547                 dev_err(&fbdev->client->dev, "unable to map device\n");
 548                 return -ENOMEM;
 549         }
 550
 551         fbdev->open = 1;
 552         dma_desc_list(fbdev, BUILD);
 553         adv7393_mode(fbdev->client, BLANK_OFF);
 554         bfin_config_ppi(fbdev);
 555         bfin_config_dma(fbdev);
 556         bfin_enable_ppi();
 557
 558         return 0;
 559 }
 560
 561 static int bfin_adv7393_fb_release(struct fb_info *info, int user)
 562 {
 563         struct adv7393fb_device *fbdev = to_adv7393fb_device(info);
 564
 565         adv7393_mode(fbdev->client, BLANK_ON);
 566         bfin_disable_dma();
 567         bfin_disable_ppi();
 568         dma_desc_list(fbdev, DESTRUCT);
 569         fbdev->open = 0;
 570         return 0;
 571 }
 572
 573 static int
 574 bfin_adv7393_fb_check_var(struct fb_var_screeninfo *var, struct fb_info *info)
 575 {
 576
 577         switch (var->bits_per_pixel) {
 578         case 16:/* DIRECTCOLOUR, 64k */
 579                 var->red.offset = info->var.red.offset;
 580                 var->green.offset = info->var.green.offset;
 581                 var->blue.offset = info->var.blue.offset;
 582                 var->red.length = info->var.red.length;
 583                 var->green.length = info->var.green.length;
 584                 var->blue.length = info->var.blue.length;
 585                 var->transp.offset = 0;
 586                 var->transp.length = 0;
 587                 var->transp.msb_right = 0;
 588                 var->red.msb_right = 0;
 589                 var->green.msb_right = 0;
 590                 var->blue.msb_right = 0;
 591                 break;
 592         default:
 593                 pr_debug("%s: depth not supported: %u BPP\n", __func__,
 594                          var->bits_per_pixel);
 595                 return -EINVAL;
 596         }
 597
 598         if (info->var.xres != var->xres ||
 599             info->var.yres != var->yres ||
 600             info->var.xres_virtual != var->xres_virtual ||
 601             info->var.yres_virtual != var->yres_virtual) {
 602                 pr_debug("%s: Resolution not supported: X%u x Y%u\n",
 603                          __func__, var->xres, var->yres);
 604                 return -EINVAL;
 605         }
 606
 607         /*
 608          *  Memory limit
 609          */
 610
 611         if ((info->fix.line_length * var->yres_virtual) > info->fix.smem_len) {
 612                 pr_debug("%s: Memory Limit requested yres_virtual = %u\n",
 613                          __func__, var->yres_virtual);
 614                 return -ENOMEM;
 615         }
 616
 617         return 0;
 618 }
 619
 620 static int
 621 bfin_adv7393_fb_pan_display(struct fb_var_screeninfo *var, struct fb_info *info)
 622 {
 623         int dy;
 624         u32 dmaaddr;
 625         struct adv7393fb_device *fbdev = to_adv7393fb_device(info);
 626
 627         if (!var || !info)
 628                 return -EINVAL;
 629
 630         if (var->xoffset - info->var.xoffset) {
 631                 /* No support for X panning for now! */
 632                 return -EINVAL;
 633         }
 634         dy = var->yoffset - info->var.yoffset;
 635
 636         if (dy) {
 637                 pr_debug("%s: Panning screen of %d lines\n", __func__, dy);
 638
 639                 dmaaddr = fbdev->av1->start_addr;
 640                 dmaaddr += (info->fix.line_length * dy);
 641                 /* TODO: Wait for current frame to finished */
 642
 643                 fbdev->av1->start_addr = (unsigned long)dmaaddr;
 644                 fbdev->av2->start_addr = (unsigned long)dmaaddr + fbdev->line_len;
 645         }
 646
 647         return 0;
 648
 649 }
 650
 651 /* 0 unblank, 1 blank, 2 no vsync, 3 no hsync, 4 off */
 652 static int bfin_adv7393_fb_blank(int blank, struct fb_info *info)
 653 {
 654         struct adv7393fb_device *fbdev = to_adv7393fb_device(info);
 655
 656         switch (blank) {
 657
 658         case VESA_NO_BLANKING:
 659                 /* Turn on panel */
 660                 adv7393_mode(fbdev->client, BLANK_OFF);
 661                 break;
 662
 663         case VESA_VSYNC_SUSPEND:
 664         case VESA_HSYNC_SUSPEND:
 665         case VESA_POWERDOWN:
 666                 /* Turn off panel */
 667                 adv7393_mode(fbdev->client, BLANK_ON);
 668                 break;
 669
 670         default:
 671                 return -EINVAL;
 672                 break;
 673         }
 674         return 0;
 675 }
 676
 677 int bfin_adv7393_fb_cursor(struct fb_info *info, struct fb_cursor *cursor)
 678 {
 679         if (nocursor)
 680                 return 0;
 681         else
 682                 return -EINVAL; /* just to force soft_cursor() call */
 683 }
 684
 685 static int bfin_adv7393_fb_setcolreg(u_int regno, u_int red, u_int green,
 686                                      u_int blue, u_int transp,
 687                                      struct fb_info *info)
 688 {
 689         if (regno >= BFIN_LCD_NBR_PALETTE_ENTRIES)
 690                 return -EINVAL;
 691
 692         if (info->var.grayscale)
 693                 /* grayscale = 0.30*R + 0.59*G + 0.11*B */
 694                 red = green = blue = (red * 77 + green * 151 + blue * 28) >> 8;
 695
 696         if (info->fix.visual == FB_VISUAL_TRUECOLOR) {
 697                 u32 value;
 698                 /* Place color in the pseudopalette */
 699                 if (regno > 16)
 700                         return -EINVAL;
 701
 702                 red   >>= (16 - info->var.red.length);
 703                 green >>= (16 - info->var.green.length);
 704                 blue  >>= (16 - info->var.blue.length);
 705
 706                 value = (red   << info->var.red.offset) |
 707                         (green << info->var.green.offset)|
 708                         (blue  << info->var.blue.offset);
 709                 value &= 0xFFFF;
 710
 711                 ((u32 *) (info->pseudo_palette))[regno] = value;
 712         }
 713
 714         return 0;
 715 }
 716
 717 static int bfin_adv7393_fb_remove(struct i2c_client *client)
 718 {
 719         struct adv7393fb_device *fbdev = i2c_get_clientdata(client);
 720
 721         adv7393_mode(client, POWER_DOWN);
 722
 723         if (fbdev->fb_mem)
 724                 dma_free_coherent(NULL, fbdev->fb_len, fbdev->fb_mem, fbdev->dma_handle);
 725         free_dma(CH_PPI);
 726         free_irq(IRQ_PPI_ERROR, fbdev);
 727         unregister_framebuffer(&fbdev->info);
 728         remove_proc_entry("driver/adv7393", NULL);
 729         fb_dealloc_cmap(&fbdev->info.cmap);
 730         kfree(fbdev->info.pseudo_palette);
 731
 732         if (ANOMALY_05000400)
 733                 gpio_free(P_IDENT(P_PPI0_FS3)); /* FS3 */
 734         peripheral_free_list(ppi_pins);
 735         kfree(fbdev);
 736
 737         return 0;
 738 }
 739
 740 #ifdef CONFIG_PM
 741 static int bfin_adv7393_fb_suspend(struct device *dev)
 742 {
 743         struct adv7393fb_device *fbdev = dev_get_drvdata(dev);
 744
 745         if (fbdev->open) {
 746                 bfin_disable_dma();
 747                 bfin_disable_ppi();
 748                 dma_desc_list(fbdev, DESTRUCT);
 749         }
 750         adv7393_mode(fbdev->client, POWER_DOWN);
 751
 752         return 0;
 753 }
 754
 755 static int bfin_adv7393_fb_resume(struct device *dev)
 756 {
 757         struct adv7393fb_device *fbdev = dev_get_drvdata(dev);
 758
 759         adv7393_mode(fbdev->client, POWER_ON);
 760
 761         if (fbdev->open) {
 762                 dma_desc_list(fbdev, BUILD);
 763                 bfin_config_ppi(fbdev);
 764                 bfin_config_dma(fbdev);
 765                 bfin_enable_ppi();
 766         }
 767
 768         return 0;
 769 }
 770
 771 static const struct dev_pm_ops bfin_adv7393_dev_pm_ops = {
 772         .suspend = bfin_adv7393_fb_suspend,
 773         .resume  = bfin_adv7393_fb_resume,
 774 };
 775 #endif
 776
 777 static const struct i2c_device_id bfin_adv7393_id[] = {
 778         {DRIVER_NAME, 0},
 779         {}
 780 };
 781
 782 MODULE_DEVICE_TABLE(i2c, bfin_adv7393_id);
 783
 784 static struct i2c_driver bfin_adv7393_fb_driver = {
 785         .driver = {
 786                 .name = DRIVER_NAME,
 787 #ifdef CONFIG_PM
 788                 .pm   = &bfin_adv7393_dev_pm_ops,
 789 #endif
 790         },
 791         .probe = bfin_adv7393_fb_probe,
 792         .remove = bfin_adv7393_fb_remove,
 793         .id_table = bfin_adv7393_id,
 794 };
 795
 796 static int __init bfin_adv7393_fb_driver_init(void)
 797 {
 798 #if  defined(CONFIG_I2C_BLACKFIN_TWI) || defined(CONFIG_I2C_BLACKFIN_TWI_MODULE)
 799         request_module("i2c-bfin-twi");
 800 #else
 801         request_module("i2c-gpio");
 802 #endif
 803
 804         return i2c_add_driver(&bfin_adv7393_fb_driver);
 805 }
 806 module_init(bfin_adv7393_fb_driver_init);
 807
 808 static void __exit bfin_adv7393_fb_driver_cleanup(void)
 809 {
 810         i2c_del_driver(&bfin_adv7393_fb_driver);
 811 }
 812 module_exit(bfin_adv7393_fb_driver_cleanup);
 813
 814 MODULE_LICENSE("GPL");
 815 MODULE_AUTHOR("Michael Hennerich <hennerich@blackfin.uclinux.org>");
 816 MODULE_DESCRIPTION("Frame buffer driver for ADV7393/2 Video Encoder");
 817
 818 module_param(mode, int, 0);
 819 MODULE_PARM_DESC(mode,
 820         "Video Mode (0=NTSC,1=PAL,2=NTSC 640x480,3=PAL 640x480,4=NTSC YCbCr input,5=PAL YCbCr input)");
 821
 822 module_param(mem, int, 0);
 823 MODULE_PARM_DESC(mem,
 824         "Size of frame buffer memory 1=Single 2=Double Size (allows y-panning / frame stacking)");
 825
 826 module_param(nocursor, int, 0644);
 827 MODULE_PARM_DESC(nocursor, "cursor enable/disable");