linux/drivers/video/bfin_adv7393fb.c
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   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
  43static int mode = VMODE;
  44static int mem = VMEM;
  45static int nocursor = 1;
  46
  47static 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
  60static 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
  71static 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
  91static struct fb_fix_screeninfo bfin_adv7393_fb_fix __devinitdata = {
  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
 102static 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
 116static 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
 198error:
 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
 207static 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
 223static void bfin_disable_dma(void)
 224{
 225        bfin_write_DMA0_CONFIG(bfin_read_DMA0_CONFIG() & ~DMAEN);
 226}
 227
 228static 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
 242static void bfin_enable_ppi(void)
 243{
 244        bfin_write_PPI_CONTROL(bfin_read_PPI_CONTROL() | PORT_EN);
 245}
 246
 247static void bfin_disable_ppi(void)
 248{
 249        bfin_write_PPI_CONTROL(bfin_read_PPI_CONTROL() & ~PORT_EN);
 250}
 251
 252static 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
 257static inline int adv7393_read(struct i2c_client *client, u8 reg)
 258{
 259        return i2c_smbus_read_byte_data(client, reg);
 260}
 261
 262static int
 263adv7393_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
 280static 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
 302static 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
 323static 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
 336static int
 337adv7393_read_proc(char *page, char **start, off_t off,
 338                  int count, int *eof, void *data)
 339{
 340        int len;
 341
 342        len = proc_output(page);
 343        if (len <= off + count)
 344                *eof = 1;
 345        *start = page + off;
 346        len -= off;
 347        if (len > count)
 348                len = count;
 349        if (len < 0)
 350                len = 0;
 351        return len;
 352}
 353
 354static int
 355adv7393_write_proc(struct file *file, const char __user * buffer,
 356                   size_t count, void *data)
 357{
 358        struct adv7393fb_device *fbdev = data;
 359        unsigned int val;
 360        int ret;
 361
 362        ret = kstrtouint_from_user(buffer, count, 0, &val);
 363        if (ret)
 364                return -EFAULT;
 365
 366        adv7393_write(fbdev->client, val >> 8, val & 0xff);
 367
 368        return count;
 369}
 370
 371static int __devinit 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 = create_proc_entry("driver/adv7393", 0, NULL);
 510        if (!entry) {
 511                dev_err(&client->dev, "unable to create /proc entry\n");
 512                ret = -EFAULT;
 513                goto free_fb;
 514        }
 515
 516        entry->read_proc = adv7393_read_proc;
 517        entry->write_proc = adv7393_write_proc;
 518        entry->data = fbdev;
 519
 520        return 0;
 521
 522free_fb:
 523        unregister_framebuffer(&fbdev->info);
 524free_irq_ppi:
 525        free_irq(IRQ_PPI_ERROR, fbdev);
 526free_ch_ppi:
 527        free_dma(CH_PPI);
 528free_cmap:
 529        fb_dealloc_cmap(&fbdev->info.cmap);
 530free_palette:
 531        kfree(fbdev->info.pseudo_palette);
 532free_fb_mem:
 533        dma_free_coherent(NULL, fbdev->fb_len, fbdev->fb_mem,
 534                          fbdev->dma_handle);
 535free_ppi_pins:
 536        peripheral_free_list(ppi_pins);
 537free_gpio:
 538        if (ANOMALY_05000400)
 539                gpio_free(P_IDENT(P_PPI0_FS3));
 540free_fbdev:
 541        kfree(fbdev);
 542
 543        return ret;
 544}
 545
 546static int bfin_adv7393_fb_open(struct fb_info *info, int user)
 547{
 548        struct adv7393fb_device *fbdev = to_adv7393fb_device(info);
 549
 550        fbdev->info.screen_base = (void *)fbdev->fb_mem;
 551        if (!fbdev->info.screen_base) {
 552                dev_err(&fbdev->client->dev, "unable to map device\n");
 553                return -ENOMEM;
 554        }
 555
 556        fbdev->open = 1;
 557        dma_desc_list(fbdev, BUILD);
 558        adv7393_mode(fbdev->client, BLANK_OFF);
 559        bfin_config_ppi(fbdev);
 560        bfin_config_dma(fbdev);
 561        bfin_enable_ppi();
 562
 563        return 0;
 564}
 565
 566static int bfin_adv7393_fb_release(struct fb_info *info, int user)
 567{
 568        struct adv7393fb_device *fbdev = to_adv7393fb_device(info);
 569
 570        adv7393_mode(fbdev->client, BLANK_ON);
 571        bfin_disable_dma();
 572        bfin_disable_ppi();
 573        dma_desc_list(fbdev, DESTRUCT);
 574        fbdev->open = 0;
 575        return 0;
 576}
 577
 578static int
 579bfin_adv7393_fb_check_var(struct fb_var_screeninfo *var, struct fb_info *info)
 580{
 581
 582        switch (var->bits_per_pixel) {
 583        case 16:/* DIRECTCOLOUR, 64k */
 584                var->red.offset = info->var.red.offset;
 585                var->green.offset = info->var.green.offset;
 586                var->blue.offset = info->var.blue.offset;
 587                var->red.length = info->var.red.length;
 588                var->green.length = info->var.green.length;
 589                var->blue.length = info->var.blue.length;
 590                var->transp.offset = 0;
 591                var->transp.length = 0;
 592                var->transp.msb_right = 0;
 593                var->red.msb_right = 0;
 594                var->green.msb_right = 0;
 595                var->blue.msb_right = 0;
 596                break;
 597        default:
 598                pr_debug("%s: depth not supported: %u BPP\n", __func__,
 599                         var->bits_per_pixel);
 600                return -EINVAL;
 601        }
 602
 603        if (info->var.xres != var->xres ||
 604            info->var.yres != var->yres ||
 605            info->var.xres_virtual != var->xres_virtual ||
 606            info->var.yres_virtual != var->yres_virtual) {
 607                pr_debug("%s: Resolution not supported: X%u x Y%u\n",
 608                         __func__, var->xres, var->yres);
 609                return -EINVAL;
 610        }
 611
 612        /*
 613         *  Memory limit
 614         */
 615
 616        if ((info->fix.line_length * var->yres_virtual) > info->fix.smem_len) {
 617                pr_debug("%s: Memory Limit requested yres_virtual = %u\n",
 618                         __func__, var->yres_virtual);
 619                return -ENOMEM;
 620        }
 621
 622        return 0;
 623}
 624
 625static int
 626bfin_adv7393_fb_pan_display(struct fb_var_screeninfo *var, struct fb_info *info)
 627{
 628        int dy;
 629        u32 dmaaddr;
 630        struct adv7393fb_device *fbdev = to_adv7393fb_device(info);
 631
 632        if (!var || !info)
 633                return -EINVAL;
 634
 635        if (var->xoffset - info->var.xoffset) {
 636                /* No support for X panning for now! */
 637                return -EINVAL;
 638        }
 639        dy = var->yoffset - info->var.yoffset;
 640
 641        if (dy) {
 642                pr_debug("%s: Panning screen of %d lines\n", __func__, dy);
 643
 644                dmaaddr = fbdev->av1->start_addr;
 645                dmaaddr += (info->fix.line_length * dy);
 646                /* TODO: Wait for current frame to finished */
 647
 648                fbdev->av1->start_addr = (unsigned long)dmaaddr;
 649                fbdev->av2->start_addr = (unsigned long)dmaaddr + fbdev->line_len;
 650        }
 651
 652        return 0;
 653
 654}
 655
 656/* 0 unblank, 1 blank, 2 no vsync, 3 no hsync, 4 off */
 657static int bfin_adv7393_fb_blank(int blank, struct fb_info *info)
 658{
 659        struct adv7393fb_device *fbdev = to_adv7393fb_device(info);
 660
 661        switch (blank) {
 662
 663        case VESA_NO_BLANKING:
 664                /* Turn on panel */
 665                adv7393_mode(fbdev->client, BLANK_OFF);
 666                break;
 667
 668        case VESA_VSYNC_SUSPEND:
 669        case VESA_HSYNC_SUSPEND:
 670        case VESA_POWERDOWN:
 671                /* Turn off panel */
 672                adv7393_mode(fbdev->client, BLANK_ON);
 673                break;
 674
 675        default:
 676                return -EINVAL;
 677                break;
 678        }
 679        return 0;
 680}
 681
 682int bfin_adv7393_fb_cursor(struct fb_info *info, struct fb_cursor *cursor)
 683{
 684        if (nocursor)
 685                return 0;
 686        else
 687                return -EINVAL; /* just to force soft_cursor() call */
 688}
 689
 690static int bfin_adv7393_fb_setcolreg(u_int regno, u_int red, u_int green,
 691                                     u_int blue, u_int transp,
 692                                     struct fb_info *info)
 693{
 694        if (regno >= BFIN_LCD_NBR_PALETTE_ENTRIES)
 695                return -EINVAL;
 696
 697        if (info->var.grayscale)
 698                /* grayscale = 0.30*R + 0.59*G + 0.11*B */
 699                red = green = blue = (red * 77 + green * 151 + blue * 28) >> 8;
 700
 701        if (info->fix.visual == FB_VISUAL_TRUECOLOR) {
 702                u32 value;
 703                /* Place color in the pseudopalette */
 704                if (regno > 16)
 705                        return -EINVAL;
 706
 707                red   >>= (16 - info->var.red.length);
 708                green >>= (16 - info->var.green.length);
 709                blue  >>= (16 - info->var.blue.length);
 710
 711                value = (red   << info->var.red.offset) |
 712                        (green << info->var.green.offset)|
 713                        (blue  << info->var.blue.offset);
 714                value &= 0xFFFF;
 715
 716                ((u32 *) (info->pseudo_palette))[regno] = value;
 717        }
 718
 719        return 0;
 720}
 721
 722static int __devexit bfin_adv7393_fb_remove(struct i2c_client *client)
 723{
 724        struct adv7393fb_device *fbdev = i2c_get_clientdata(client);
 725
 726        adv7393_mode(client, POWER_DOWN);
 727
 728        if (fbdev->fb_mem)
 729                dma_free_coherent(NULL, fbdev->fb_len, fbdev->fb_mem, fbdev->dma_handle);
 730        free_dma(CH_PPI);
 731        free_irq(IRQ_PPI_ERROR, fbdev);
 732        unregister_framebuffer(&fbdev->info);
 733        remove_proc_entry("driver/adv7393", NULL);
 734        fb_dealloc_cmap(&fbdev->info.cmap);
 735        kfree(fbdev->info.pseudo_palette);
 736
 737        if (ANOMALY_05000400)
 738                gpio_free(P_IDENT(P_PPI0_FS3)); /* FS3 */
 739        peripheral_free_list(ppi_pins);
 740        kfree(fbdev);
 741
 742        return 0;
 743}
 744
 745#ifdef CONFIG_PM
 746static int bfin_adv7393_fb_suspend(struct device *dev)
 747{
 748        struct adv7393fb_device *fbdev = dev_get_drvdata(dev);
 749
 750        if (fbdev->open) {
 751                bfin_disable_dma();
 752                bfin_disable_ppi();
 753                dma_desc_list(fbdev, DESTRUCT);
 754        }
 755        adv7393_mode(fbdev->client, POWER_DOWN);
 756
 757        return 0;
 758}
 759
 760static int bfin_adv7393_fb_resume(struct device *dev)
 761{
 762        struct adv7393fb_device *fbdev = dev_get_drvdata(dev);
 763
 764        adv7393_mode(fbdev->client, POWER_ON);
 765
 766        if (fbdev->open) {
 767                dma_desc_list(fbdev, BUILD);
 768                bfin_config_ppi(fbdev);
 769                bfin_config_dma(fbdev);
 770                bfin_enable_ppi();
 771        }
 772
 773        return 0;
 774}
 775
 776static const struct dev_pm_ops bfin_adv7393_dev_pm_ops = {
 777        .suspend = bfin_adv7393_fb_suspend,
 778        .resume  = bfin_adv7393_fb_resume,
 779};
 780#endif
 781
 782static const struct i2c_device_id bfin_adv7393_id[] = {
 783        {DRIVER_NAME, 0},
 784        {}
 785};
 786
 787MODULE_DEVICE_TABLE(i2c, bfin_adv7393_id);
 788
 789static struct i2c_driver bfin_adv7393_fb_driver = {
 790        .driver = {
 791                .name = DRIVER_NAME,
 792#ifdef CONFIG_PM
 793                .pm   = &bfin_adv7393_dev_pm_ops,
 794#endif
 795        },
 796        .probe = bfin_adv7393_fb_probe,
 797        .remove = __devexit_p(bfin_adv7393_fb_remove),
 798        .id_table = bfin_adv7393_id,
 799};
 800
 801static int __init bfin_adv7393_fb_driver_init(void)
 802{
 803#if  defined(CONFIG_I2C_BLACKFIN_TWI) || defined(CONFIG_I2C_BLACKFIN_TWI_MODULE)
 804        request_module("i2c-bfin-twi");
 805#else
 806        request_module("i2c-gpio");
 807#endif
 808
 809        return i2c_add_driver(&bfin_adv7393_fb_driver);
 810}
 811module_init(bfin_adv7393_fb_driver_init);
 812
 813static void __exit bfin_adv7393_fb_driver_cleanup(void)
 814{
 815        i2c_del_driver(&bfin_adv7393_fb_driver);
 816}
 817module_exit(bfin_adv7393_fb_driver_cleanup);
 818
 819MODULE_LICENSE("GPL");
 820MODULE_AUTHOR("Michael Hennerich <hennerich@blackfin.uclinux.org>");
 821MODULE_DESCRIPTION("Frame buffer driver for ADV7393/2 Video Encoder");
 822
 823module_param(mode, int, 0);
 824MODULE_PARM_DESC(mode,
 825        "Video Mode (0=NTSC,1=PAL,2=NTSC 640x480,3=PAL 640x480,4=NTSC YCbCr input,5=PAL YCbCr input)");
 826
 827module_param(mem, int, 0);
 828MODULE_PARM_DESC(mem,
 829        "Size of frame buffer memory 1=Single 2=Double Size (allows y-panning / frame stacking)");
 830
 831module_param(nocursor, int, 0644);
 832MODULE_PARM_DESC(nocursor, "cursor enable/disable");
 833
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