drivers/video/bf537-lq035.c

   1 /*
   2  * Analog Devices Blackfin(BF537 STAMP) + SHARP TFT LCD.
   3  * http://docs.blackfin.uclinux.org/doku.php?id=hw:cards:tft-lcd
   4  *
   5  * Copyright 2006-2010 Analog Devices Inc.
   6  * Licensed under the GPL-2.
   7  */
   8
   9 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
  10
  11 #include <linux/module.h>
  12 #include <linux/kernel.h>
  13 #include <linux/errno.h>
  14 #include <linux/string.h>
  15 #include <linux/mm.h>
  16 #include <linux/delay.h>
  17 #include <linux/fb.h>
  18 #include <linux/ioport.h>
  19 #include <linux/init.h>
  20 #include <linux/types.h>
  21 #include <linux/gpio.h>
  22 #include <linux/interrupt.h>
  23 #include <linux/sched.h>
  24 #include <linux/timer.h>
  25 #include <linux/device.h>
  26 #include <linux/backlight.h>
  27 #include <linux/lcd.h>
  28 #include <linux/i2c.h>
  29 #include <linux/spinlock.h>
  30 #include <linux/dma-mapping.h>
  31 #include <linux/slab.h>
  32 #include <linux/platform_device.h>
  33
  34 #include <asm/blackfin.h>
  35 #include <asm/irq.h>
  36 #include <asm/dpmc.h>
  37 #include <asm/dma.h>
  38 #include <asm/portmux.h>
  39
  40 #define NO_BL 1
  41
  42 #define MAX_BRIGHENESS  95
  43 #define MIN_BRIGHENESS  5
  44 #define NBR_PALETTE     256
  45
  46 static const unsigned short ppi_pins[] = {
  47         P_PPI0_CLK, P_PPI0_D0, P_PPI0_D1, P_PPI0_D2, P_PPI0_D3,
  48         P_PPI0_D4, P_PPI0_D5, P_PPI0_D6, P_PPI0_D7,
  49         P_PPI0_D8, P_PPI0_D9, P_PPI0_D10, P_PPI0_D11,
  50         P_PPI0_D12, P_PPI0_D13, P_PPI0_D14, P_PPI0_D15, 0
  51 };
  52
  53 static unsigned char *fb_buffer;          /* RGB Buffer */
  54 static unsigned long *dma_desc_table;
  55 static int t_conf_done, lq035_open_cnt;
  56 static DEFINE_SPINLOCK(bfin_lq035_lock);
  57
  58 static int landscape;
  59 module_param(landscape, int, 0);
  60 MODULE_PARM_DESC(landscape,
  61         "LANDSCAPE use 320x240 instead of Native 240x320 Resolution");
  62
  63 static int bgr;
  64 module_param(bgr, int, 0);
  65 MODULE_PARM_DESC(bgr,
  66         "BGR use 16-bit BGR-565 instead of RGB-565");
  67
  68 static int nocursor = 1;
  69 module_param(nocursor, int, 0644);
  70 MODULE_PARM_DESC(nocursor, "cursor enable/disable");
  71
  72 static unsigned long current_brightness;  /* backlight */
  73
  74 /* AD5280 vcomm */
  75 static unsigned char vcomm_value = 150;
  76 static struct i2c_client *ad5280_client;
  77
  78 static void set_vcomm(void)
  79 {
  80         int nr;
  81
  82         if (!ad5280_client)
  83                 return;
  84
  85         nr = i2c_smbus_write_byte_data(ad5280_client, 0x00, vcomm_value);
  86         if (nr)
  87                 pr_err("i2c_smbus_write_byte_data fail: %d\n", nr);
  88 }
  89
  90 static int __devinit ad5280_probe(struct i2c_client *client,
  91                                   const struct i2c_device_id *id)
  92 {
  93         int ret;
  94         if (!i2c_check_functionality(client->adapter,
  95                                      I2C_FUNC_SMBUS_BYTE_DATA)) {
  96                 dev_err(&client->dev, "SMBUS Byte Data not Supported\n");
  97                 return -EIO;
  98         }
  99
 100         ret = i2c_smbus_write_byte_data(client, 0x00, vcomm_value);
 101         if (ret) {
 102                 dev_err(&client->dev, "write fail: %d\n", ret);
 103                 return ret;
 104         }
 105
 106         ad5280_client = client;
 107
 108         return 0;
 109 }
 110
 111 static int __devexit ad5280_remove(struct i2c_client *client)
 112 {
 113         ad5280_client = NULL;
 114         return 0;
 115 }
 116
 117 static const struct i2c_device_id ad5280_id[] = {
 118         {"bf537-lq035-ad5280", 0},
 119         {}
 120 };
 121
 122 MODULE_DEVICE_TABLE(i2c, ad5280_id);
 123
 124 static struct i2c_driver ad5280_driver = {
 125         .driver = {
 126                 .name = "bf537-lq035-ad5280",
 127         },
 128         .probe = ad5280_probe,
 129         .remove = __devexit_p(ad5280_remove),
 130         .id_table = ad5280_id,
 131 };
 132
 133 #ifdef CONFIG_PNAV10
 134 #define MOD GPIO_PH13
 135
 136 #define bfin_write_TIMER_LP_CONFIG      bfin_write_TIMER0_CONFIG
 137 #define bfin_write_TIMER_LP_WIDTH       bfin_write_TIMER0_WIDTH
 138 #define bfin_write_TIMER_LP_PERIOD      bfin_write_TIMER0_PERIOD
 139 #define bfin_read_TIMER_LP_COUNTER      bfin_read_TIMER0_COUNTER
 140 #define TIMDIS_LP                       TIMDIS0
 141 #define TIMEN_LP                        TIMEN0
 142
 143 #define bfin_write_TIMER_SPS_CONFIG     bfin_write_TIMER1_CONFIG
 144 #define bfin_write_TIMER_SPS_WIDTH      bfin_write_TIMER1_WIDTH
 145 #define bfin_write_TIMER_SPS_PERIOD     bfin_write_TIMER1_PERIOD
 146 #define TIMDIS_SPS                      TIMDIS1
 147 #define TIMEN_SPS                       TIMEN1
 148
 149 #define bfin_write_TIMER_SP_CONFIG      bfin_write_TIMER5_CONFIG
 150 #define bfin_write_TIMER_SP_WIDTH       bfin_write_TIMER5_WIDTH
 151 #define bfin_write_TIMER_SP_PERIOD      bfin_write_TIMER5_PERIOD
 152 #define TIMDIS_SP                       TIMDIS5
 153 #define TIMEN_SP                        TIMEN5
 154
 155 #define bfin_write_TIMER_PS_CLS_CONFIG  bfin_write_TIMER2_CONFIG
 156 #define bfin_write_TIMER_PS_CLS_WIDTH   bfin_write_TIMER2_WIDTH
 157 #define bfin_write_TIMER_PS_CLS_PERIOD  bfin_write_TIMER2_PERIOD
 158 #define TIMDIS_PS_CLS                   TIMDIS2
 159 #define TIMEN_PS_CLS                    TIMEN2
 160
 161 #define bfin_write_TIMER_REV_CONFIG     bfin_write_TIMER3_CONFIG
 162 #define bfin_write_TIMER_REV_WIDTH      bfin_write_TIMER3_WIDTH
 163 #define bfin_write_TIMER_REV_PERIOD     bfin_write_TIMER3_PERIOD
 164 #define TIMDIS_REV                      TIMDIS3
 165 #define TIMEN_REV                       TIMEN3
 166 #define bfin_read_TIMER_REV_COUNTER     bfin_read_TIMER3_COUNTER
 167
 168 #define FREQ_PPI_CLK         (5*1024*1024)  /* PPI_CLK 5MHz */
 169
 170 #define TIMERS {P_TMR0, P_TMR1, P_TMR2, P_TMR3, P_TMR5, 0}
 171
 172 #else
 173
 174 #define UD      GPIO_PF13       /* Up / Down */
 175 #define MOD     GPIO_PF10
 176 #define LBR     GPIO_PF14       /* Left Right */
 177
 178 #define bfin_write_TIMER_LP_CONFIG      bfin_write_TIMER6_CONFIG
 179 #define bfin_write_TIMER_LP_WIDTH       bfin_write_TIMER6_WIDTH
 180 #define bfin_write_TIMER_LP_PERIOD      bfin_write_TIMER6_PERIOD
 181 #define bfin_read_TIMER_LP_COUNTER      bfin_read_TIMER6_COUNTER
 182 #define TIMDIS_LP                       TIMDIS6
 183 #define TIMEN_LP                        TIMEN6
 184
 185 #define bfin_write_TIMER_SPS_CONFIG     bfin_write_TIMER1_CONFIG
 186 #define bfin_write_TIMER_SPS_WIDTH      bfin_write_TIMER1_WIDTH
 187 #define bfin_write_TIMER_SPS_PERIOD     bfin_write_TIMER1_PERIOD
 188 #define TIMDIS_SPS                      TIMDIS1
 189 #define TIMEN_SPS                       TIMEN1
 190
 191 #define bfin_write_TIMER_SP_CONFIG      bfin_write_TIMER0_CONFIG
 192 #define bfin_write_TIMER_SP_WIDTH       bfin_write_TIMER0_WIDTH
 193 #define bfin_write_TIMER_SP_PERIOD      bfin_write_TIMER0_PERIOD
 194 #define TIMDIS_SP                       TIMDIS0
 195 #define TIMEN_SP                        TIMEN0
 196
 197 #define bfin_write_TIMER_PS_CLS_CONFIG  bfin_write_TIMER7_CONFIG
 198 #define bfin_write_TIMER_PS_CLS_WIDTH   bfin_write_TIMER7_WIDTH
 199 #define bfin_write_TIMER_PS_CLS_PERIOD  bfin_write_TIMER7_PERIOD
 200 #define TIMDIS_PS_CLS                   TIMDIS7
 201 #define TIMEN_PS_CLS                    TIMEN7
 202
 203 #define bfin_write_TIMER_REV_CONFIG     bfin_write_TIMER5_CONFIG
 204 #define bfin_write_TIMER_REV_WIDTH      bfin_write_TIMER5_WIDTH
 205 #define bfin_write_TIMER_REV_PERIOD     bfin_write_TIMER5_PERIOD
 206 #define TIMDIS_REV                      TIMDIS5
 207 #define TIMEN_REV                       TIMEN5
 208 #define bfin_read_TIMER_REV_COUNTER     bfin_read_TIMER5_COUNTER
 209
 210 #define FREQ_PPI_CLK         (6*1000*1000)  /* PPI_CLK 6MHz */
 211 #define TIMERS {P_TMR0, P_TMR1, P_TMR5, P_TMR6, P_TMR7, 0}
 212
 213 #endif
 214
 215 #define LCD_X_RES                       240 /* Horizontal Resolution */
 216 #define LCD_Y_RES                       320 /* Vertical Resolution */
 217
 218 #define LCD_BBP                         16  /* Bit Per Pixel */
 219
 220 /* the LCD and the DMA start counting differently;
 221  * since one starts at 0 and the other starts at 1,
 222  * we have a difference of 1 between START_LINES
 223  * and U_LINES.
 224  */
 225 #define START_LINES       8   /* lines for field flyback or field blanking signal */
 226 #define U_LINES           9   /* number of undisplayed blanking lines */
 227
 228 #define FRAMES_PER_SEC    (60)
 229
 230 #define DCLKS_PER_FRAME   (FREQ_PPI_CLK/FRAMES_PER_SEC)
 231 #define DCLKS_PER_LINE    (DCLKS_PER_FRAME/(LCD_Y_RES+U_LINES))
 232
 233 #define PPI_CONFIG_VALUE  (PORT_DIR|XFR_TYPE|DLEN_16|POLS)
 234 #define PPI_DELAY_VALUE   (0)
 235 #define TIMER_CONFIG      (PWM_OUT|PERIOD_CNT|TIN_SEL|CLK_SEL)
 236
 237 #define ACTIVE_VIDEO_MEM_OFFSET (LCD_X_RES*START_LINES*(LCD_BBP/8))
 238 #define ACTIVE_VIDEO_MEM_SIZE   (LCD_Y_RES*LCD_X_RES*(LCD_BBP/8))
 239 #define TOTAL_VIDEO_MEM_SIZE    ((LCD_Y_RES+U_LINES)*LCD_X_RES*(LCD_BBP/8))
 240 #define TOTAL_DMA_DESC_SIZE     (2 * sizeof(u32) * (LCD_Y_RES + U_LINES))
 241
 242 static void start_timers(void) /* CHECK with HW */
 243 {
 244         unsigned long flags;
 245
 246         local_irq_save(flags);
 247
 248         bfin_write_TIMER_ENABLE(TIMEN_REV);
 249         SSYNC();
 250
 251         while (bfin_read_TIMER_REV_COUNTER() <= 11)
 252                 continue;
 253         bfin_write_TIMER_ENABLE(TIMEN_LP);
 254         SSYNC();
 255
 256         while (bfin_read_TIMER_LP_COUNTER() < 3)
 257                 continue;
 258         bfin_write_TIMER_ENABLE(TIMEN_SP|TIMEN_SPS|TIMEN_PS_CLS);
 259         SSYNC();
 260         t_conf_done = 1;
 261         local_irq_restore(flags);
 262 }
 263
 264 static void config_timers(void)
 265 {
 266         /* Stop timers */
 267         bfin_write_TIMER_DISABLE(TIMDIS_SP|TIMDIS_SPS|TIMDIS_REV|
 268                                  TIMDIS_LP|TIMDIS_PS_CLS);
 269         SSYNC();
 270
 271         /* LP, timer 6 */
 272         bfin_write_TIMER_LP_CONFIG(TIMER_CONFIG|PULSE_HI);
 273         bfin_write_TIMER_LP_WIDTH(1);
 274
 275         bfin_write_TIMER_LP_PERIOD(DCLKS_PER_LINE);
 276         SSYNC();
 277
 278         /* SPS, timer 1 */
 279         bfin_write_TIMER_SPS_CONFIG(TIMER_CONFIG|PULSE_HI);
 280         bfin_write_TIMER_SPS_WIDTH(DCLKS_PER_LINE*2);
 281         bfin_write_TIMER_SPS_PERIOD((DCLKS_PER_LINE * (LCD_Y_RES+U_LINES)));
 282         SSYNC();
 283
 284         /* SP, timer 0 */
 285         bfin_write_TIMER_SP_CONFIG(TIMER_CONFIG|PULSE_HI);
 286         bfin_write_TIMER_SP_WIDTH(1);
 287         bfin_write_TIMER_SP_PERIOD(DCLKS_PER_LINE);
 288         SSYNC();
 289
 290         /* PS & CLS, timer 7 */
 291         bfin_write_TIMER_PS_CLS_CONFIG(TIMER_CONFIG);
 292         bfin_write_TIMER_PS_CLS_WIDTH(LCD_X_RES + START_LINES);
 293         bfin_write_TIMER_PS_CLS_PERIOD(DCLKS_PER_LINE);
 294
 295         SSYNC();
 296
 297 #ifdef NO_BL
 298         /* REV, timer 5 */
 299         bfin_write_TIMER_REV_CONFIG(TIMER_CONFIG|PULSE_HI);
 300
 301         bfin_write_TIMER_REV_WIDTH(DCLKS_PER_LINE);
 302         bfin_write_TIMER_REV_PERIOD(DCLKS_PER_LINE*2);
 303
 304         SSYNC();
 305 #endif
 306 }
 307
 308 static void config_ppi(void)
 309 {
 310         bfin_write_PPI_DELAY(PPI_DELAY_VALUE);
 311         bfin_write_PPI_COUNT(LCD_X_RES-1);
 312         /* 0x10 -> PORT_CFG -> 2 or 3 frame syncs */
 313         bfin_write_PPI_CONTROL((PPI_CONFIG_VALUE|0x10) & (~POLS));
 314 }
 315
 316 static int config_dma(void)
 317 {
 318         u32 i;
 319
 320         if (landscape) {
 321
 322                 for (i = 0; i < U_LINES; ++i) {
 323                         /* blanking lines point to first line of fb_buffer */
 324                         dma_desc_table[2*i] = (unsigned long)&dma_desc_table[2*i+2];
 325                         dma_desc_table[2*i+1] = (unsigned long)fb_buffer;
 326                 }
 327
 328                 for (i = U_LINES; i < U_LINES + LCD_Y_RES; ++i) {
 329                         /* visible lines */
 330                         dma_desc_table[2*i] = (unsigned long)&dma_desc_table[2*i+2];
 331                         dma_desc_table[2*i+1] = (unsigned long)fb_buffer +
 332                                                 (LCD_Y_RES+U_LINES-1-i)*2;
 333                 }
 334
 335                 /* last descriptor points to first */
 336                 dma_desc_table[2*(LCD_Y_RES+U_LINES-1)] = (unsigned long)&dma_desc_table[0];
 337
 338                 set_dma_x_count(CH_PPI, LCD_X_RES);
 339                 set_dma_x_modify(CH_PPI, LCD_Y_RES * (LCD_BBP / 8));
 340                 set_dma_y_count(CH_PPI, 0);
 341                 set_dma_y_modify(CH_PPI, 0);
 342                 set_dma_next_desc_addr(CH_PPI, (void *)dma_desc_table[0]);
 343                 set_dma_config(CH_PPI, DMAFLOW_LARGE | NDSIZE_4 | WDSIZE_16);
 344
 345         } else {
 346
 347                 set_dma_config(CH_PPI, set_bfin_dma_config(DIR_READ,
 348                                 DMA_FLOW_AUTO,
 349                                 INTR_DISABLE,
 350                                 DIMENSION_2D,
 351                                 DATA_SIZE_16,
 352                                 DMA_NOSYNC_KEEP_DMA_BUF));
 353                 set_dma_x_count(CH_PPI, LCD_X_RES);
 354                 set_dma_x_modify(CH_PPI, LCD_BBP / 8);
 355                 set_dma_y_count(CH_PPI, LCD_Y_RES+U_LINES);
 356                 set_dma_y_modify(CH_PPI, LCD_BBP / 8);
 357                 set_dma_start_addr(CH_PPI, (unsigned long) fb_buffer);
 358         }
 359
 360         return 0;
 361 }
 362
 363 static int __devinit request_ports(void)
 364 {
 365         u16 tmr_req[] = TIMERS;
 366
 367         /*
 368                 UD:      PF13
 369                 MOD:     PF10
 370                 LBR:     PF14
 371                 PPI_CLK: PF15
 372         */
 373
 374         if (peripheral_request_list(ppi_pins, KBUILD_MODNAME)) {
 375                 pr_err("requesting PPI peripheral failed\n");
 376                 return -EBUSY;
 377         }
 378
 379         if (peripheral_request_list(tmr_req, KBUILD_MODNAME)) {
 380                 peripheral_free_list(ppi_pins);
 381                 pr_err("requesting timer peripheral failed\n");
 382                 return -EBUSY;
 383         }
 384
 385 #if (defined(UD) && defined(LBR))
 386         if (gpio_request(UD, KBUILD_MODNAME)) {
 387                 pr_err("requesting GPIO %d failed\n", UD);
 388                 return -EBUSY;
 389         }
 390
 391         if (gpio_request(LBR, KBUILD_MODNAME)) {
 392                 pr_err("requesting GPIO %d failed\n", LBR);
 393                 gpio_free(UD);
 394                 return -EBUSY;
 395         }
 396
 397         gpio_direction_output(UD, 0);
 398         gpio_direction_output(LBR, 1);
 399
 400 #endif
 401
 402         if (gpio_request(MOD, KBUILD_MODNAME)) {
 403                 pr_err("requesting GPIO %d failed\n", MOD);
 404 #if (defined(UD) && defined(LBR))
 405                 gpio_free(LBR);
 406                 gpio_free(UD);
 407 #endif
 408                 return -EBUSY;
 409         }
 410
 411         gpio_direction_output(MOD, 1);
 412
 413         SSYNC();
 414         return 0;
 415 }
 416
 417 static void free_ports(void)
 418 {
 419         u16 tmr_req[] = TIMERS;
 420
 421         peripheral_free_list(ppi_pins);
 422         peripheral_free_list(tmr_req);
 423
 424 #if defined(UD) && defined(LBR)
 425         gpio_free(LBR);
 426         gpio_free(UD);
 427 #endif
 428         gpio_free(MOD);
 429 }
 430
 431 static struct fb_info bfin_lq035_fb;
 432
 433 static struct fb_var_screeninfo bfin_lq035_fb_defined = {
 434         .bits_per_pixel         = LCD_BBP,
 435         .activate               = FB_ACTIVATE_TEST,
 436         .xres                   = LCD_X_RES,    /*default portrait mode RGB*/
 437         .yres                   = LCD_Y_RES,
 438         .xres_virtual           = LCD_X_RES,
 439         .yres_virtual           = LCD_Y_RES,
 440         .height                 = -1,
 441         .width                  = -1,
 442         .left_margin            = 0,
 443         .right_margin           = 0,
 444         .upper_margin           = 0,
 445         .lower_margin           = 0,
 446         .red                    = {11, 5, 0},
 447         .green                  = {5, 6, 0},
 448         .blue                   = {0, 5, 0},
 449         .transp         = {0, 0, 0},
 450 };
 451
 452 static struct fb_fix_screeninfo bfin_lq035_fb_fix __devinitdata = {
 453         .id             = KBUILD_MODNAME,
 454         .smem_len       = ACTIVE_VIDEO_MEM_SIZE,
 455         .type           = FB_TYPE_PACKED_PIXELS,
 456         .visual         = FB_VISUAL_TRUECOLOR,
 457         .xpanstep       = 0,
 458         .ypanstep       = 0,
 459         .line_length    = LCD_X_RES*(LCD_BBP/8),
 460         .accel          = FB_ACCEL_NONE,
 461 };
 462
 463
 464 static int bfin_lq035_fb_open(struct fb_info *info, int user)
 465 {
 466         unsigned long flags;
 467
 468         spin_lock_irqsave(&bfin_lq035_lock, flags);
 469         lq035_open_cnt++;
 470         spin_unlock_irqrestore(&bfin_lq035_lock, flags);
 471
 472         if (lq035_open_cnt <= 1) {
 473                 bfin_write_PPI_CONTROL(0);
 474                 SSYNC();
 475
 476                 set_vcomm();
 477                 config_dma();
 478                 config_ppi();
 479
 480                 /* start dma */
 481                 enable_dma(CH_PPI);
 482                 SSYNC();
 483                 bfin_write_PPI_CONTROL(bfin_read_PPI_CONTROL() | PORT_EN);
 484                 SSYNC();
 485
 486                 if (!t_conf_done) {
 487                         config_timers();
 488                         start_timers();
 489                 }
 490                 /* gpio_set_value(MOD,1); */
 491         }
 492
 493         return 0;
 494 }
 495
 496 static int bfin_lq035_fb_release(struct fb_info *info, int user)
 497 {
 498         unsigned long flags;
 499
 500         spin_lock_irqsave(&bfin_lq035_lock, flags);
 501         lq035_open_cnt--;
 502         spin_unlock_irqrestore(&bfin_lq035_lock, flags);
 503
 504
 505         if (lq035_open_cnt <= 0) {
 506
 507                 bfin_write_PPI_CONTROL(0);
 508                 SSYNC();
 509
 510                 disable_dma(CH_PPI);
 511         }
 512
 513         return 0;
 514 }
 515
 516
 517 static int bfin_lq035_fb_check_var(struct fb_var_screeninfo *var,
 518                                    struct fb_info *info)
 519 {
 520         switch (var->bits_per_pixel) {
 521         case 16:/* DIRECTCOLOUR, 64k */
 522                 var->red.offset = info->var.red.offset;
 523                 var->green.offset = info->var.green.offset;
 524                 var->blue.offset = info->var.blue.offset;
 525                 var->red.length = info->var.red.length;
 526                 var->green.length = info->var.green.length;
 527                 var->blue.length = info->var.blue.length;
 528                 var->transp.offset = 0;
 529                 var->transp.length = 0;
 530                 var->transp.msb_right = 0;
 531                 var->red.msb_right = 0;
 532                 var->green.msb_right = 0;
 533                 var->blue.msb_right = 0;
 534                 break;
 535         default:
 536                 pr_debug("%s: depth not supported: %u BPP\n", __func__,
 537                          var->bits_per_pixel);
 538                 return -EINVAL;
 539         }
 540
 541         if (info->var.xres != var->xres ||
 542             info->var.yres != var->yres ||
 543             info->var.xres_virtual != var->xres_virtual ||
 544             info->var.yres_virtual != var->yres_virtual) {
 545                 pr_debug("%s: Resolution not supported: X%u x Y%u\n",
 546                          __func__, var->xres, var->yres);
 547                 return -EINVAL;
 548         }
 549
 550         /*
 551          *  Memory limit
 552          */
 553
 554         if ((info->fix.line_length * var->yres_virtual) > info->fix.smem_len) {
 555                 pr_debug("%s: Memory Limit requested yres_virtual = %u\n",
 556                          __func__, var->yres_virtual);
 557                 return -ENOMEM;
 558         }
 559
 560         return 0;
 561 }
 562
 563 /* fb_rotate
 564  * Rotate the display of this angle. This doesn't seems to be used by the core,
 565  * but as our hardware supports it, so why not implementing it...
 566  */
 567 static void bfin_lq035_fb_rotate(struct fb_info *fbi, int angle)
 568 {
 569         pr_debug("%s: %p %d", __func__, fbi, angle);
 570 #if (defined(UD) && defined(LBR))
 571         switch (angle) {
 572
 573         case 180:
 574                 gpio_set_value(LBR, 0);
 575                 gpio_set_value(UD, 1);
 576                 break;
 577         default:
 578                 gpio_set_value(LBR, 1);
 579                 gpio_set_value(UD, 0);
 580                 break;
 581         }
 582 #endif
 583 }
 584
 585 static int bfin_lq035_fb_cursor(struct fb_info *info, struct fb_cursor *cursor)
 586 {
 587         if (nocursor)
 588                 return 0;
 589         else
 590                 return -EINVAL; /* just to force soft_cursor() call */
 591 }
 592
 593 static int bfin_lq035_fb_setcolreg(u_int regno, u_int red, u_int green,
 594                                    u_int blue, u_int transp,
 595                                    struct fb_info *info)
 596 {
 597         if (regno >= NBR_PALETTE)
 598                 return -EINVAL;
 599
 600         if (info->var.grayscale)
 601                 /* grayscale = 0.30*R + 0.59*G + 0.11*B */
 602                 red = green = blue = (red * 77 + green * 151 + blue * 28) >> 8;
 603
 604         if (info->fix.visual == FB_VISUAL_TRUECOLOR) {
 605
 606                 u32 value;
 607                 /* Place color in the pseudopalette */
 608                 if (regno > 16)
 609                         return -EINVAL;
 610
 611                 red   >>= (16 - info->var.red.length);
 612                 green >>= (16 - info->var.green.length);
 613                 blue  >>= (16 - info->var.blue.length);
 614
 615                 value = (red   << info->var.red.offset) |
 616                         (green << info->var.green.offset)|
 617                         (blue  << info->var.blue.offset);
 618                 value &= 0xFFFF;
 619
 620                 ((u32 *) (info->pseudo_palette))[regno] = value;
 621
 622         }
 623
 624         return 0;
 625 }
 626
 627 static struct fb_ops bfin_lq035_fb_ops = {
 628         .owner                  = THIS_MODULE,
 629         .fb_open                = bfin_lq035_fb_open,
 630         .fb_release             = bfin_lq035_fb_release,
 631         .fb_check_var           = bfin_lq035_fb_check_var,
 632         .fb_rotate              = bfin_lq035_fb_rotate,
 633         .fb_fillrect            = cfb_fillrect,
 634         .fb_copyarea            = cfb_copyarea,
 635         .fb_imageblit           = cfb_imageblit,
 636         .fb_cursor              = bfin_lq035_fb_cursor,
 637         .fb_setcolreg           = bfin_lq035_fb_setcolreg,
 638 };
 639
 640 static int bl_get_brightness(struct backlight_device *bd)
 641 {
 642         return current_brightness;
 643 }
 644
 645 static const struct backlight_ops bfin_lq035fb_bl_ops = {
 646         .get_brightness = bl_get_brightness,
 647 };
 648
 649 static struct backlight_device *bl_dev;
 650
 651 static int bfin_lcd_get_power(struct lcd_device *dev)
 652 {
 653         return 0;
 654 }
 655
 656 static int bfin_lcd_set_power(struct lcd_device *dev, int power)
 657 {
 658         return 0;
 659 }
 660
 661 static int bfin_lcd_get_contrast(struct lcd_device *dev)
 662 {
 663         return (int)vcomm_value;
 664 }
 665
 666 static int bfin_lcd_set_contrast(struct lcd_device *dev, int contrast)
 667 {
 668         if (contrast > 255)
 669                 contrast = 255;
 670         if (contrast < 0)
 671                 contrast = 0;
 672
 673         vcomm_value = (unsigned char)contrast;
 674         set_vcomm();
 675         return 0;
 676 }
 677
 678 static int bfin_lcd_check_fb(struct lcd_device *lcd, struct fb_info *fi)
 679 {
 680         if (!fi || (fi == &bfin_lq035_fb))
 681                 return 1;
 682         return 0;
 683 }
 684
 685 static struct lcd_ops bfin_lcd_ops = {
 686         .get_power      = bfin_lcd_get_power,
 687         .set_power      = bfin_lcd_set_power,
 688         .get_contrast   = bfin_lcd_get_contrast,
 689         .set_contrast   = bfin_lcd_set_contrast,
 690         .check_fb       = bfin_lcd_check_fb,
 691 };
 692
 693 static struct lcd_device *lcd_dev;
 694
 695 static int __devinit bfin_lq035_probe(struct platform_device *pdev)
 696 {
 697         struct backlight_properties props;
 698         dma_addr_t dma_handle;
 699
 700         if (request_dma(CH_PPI, KBUILD_MODNAME)) {
 701                 pr_err("couldn't request PPI DMA\n");
 702                 return -EFAULT;
 703         }
 704
 705         if (request_ports()) {
 706                 pr_err("couldn't request gpio port\n");
 707                 free_dma(CH_PPI);
 708                 return -EFAULT;
 709         }
 710
 711         fb_buffer = dma_alloc_coherent(NULL, TOTAL_VIDEO_MEM_SIZE,
 712                                        &dma_handle, GFP_KERNEL);
 713         if (fb_buffer == NULL) {
 714                 pr_err("couldn't allocate dma buffer\n");
 715                 free_dma(CH_PPI);
 716                 free_ports();
 717                 return -ENOMEM;
 718         }
 719
 720         if (L1_DATA_A_LENGTH)
 721                 dma_desc_table = l1_data_sram_zalloc(TOTAL_DMA_DESC_SIZE);
 722         else
 723                 dma_desc_table = dma_alloc_coherent(NULL, TOTAL_DMA_DESC_SIZE,
 724                                                     &dma_handle, 0);
 725
 726         if (dma_desc_table == NULL) {
 727                 pr_err("couldn't allocate dma descriptor\n");
 728                 free_dma(CH_PPI);
 729                 free_ports();
 730                 dma_free_coherent(NULL, TOTAL_VIDEO_MEM_SIZE, fb_buffer, 0);
 731                 return -ENOMEM;
 732         }
 733
 734         bfin_lq035_fb.screen_base = (void *)fb_buffer;
 735         bfin_lq035_fb_fix.smem_start = (int)fb_buffer;
 736         if (landscape) {
 737                 bfin_lq035_fb_defined.xres = LCD_Y_RES;
 738                 bfin_lq035_fb_defined.yres = LCD_X_RES;
 739                 bfin_lq035_fb_defined.xres_virtual = LCD_Y_RES;
 740                 bfin_lq035_fb_defined.yres_virtual = LCD_X_RES;
 741
 742                 bfin_lq035_fb_fix.line_length = LCD_Y_RES*(LCD_BBP/8);
 743         } else {
 744                 bfin_lq035_fb.screen_base += ACTIVE_VIDEO_MEM_OFFSET;
 745                 bfin_lq035_fb_fix.smem_start += ACTIVE_VIDEO_MEM_OFFSET;
 746         }
 747
 748         bfin_lq035_fb_defined.green.msb_right = 0;
 749         bfin_lq035_fb_defined.red.msb_right   = 0;
 750         bfin_lq035_fb_defined.blue.msb_right  = 0;
 751         bfin_lq035_fb_defined.green.offset    = 5;
 752         bfin_lq035_fb_defined.green.length    = 6;
 753         bfin_lq035_fb_defined.red.length      = 5;
 754         bfin_lq035_fb_defined.blue.length     = 5;
 755
 756         if (bgr) {
 757                 bfin_lq035_fb_defined.red.offset  = 0;
 758                 bfin_lq035_fb_defined.blue.offset = 11;
 759         } else {
 760                 bfin_lq035_fb_defined.red.offset  = 11;
 761                 bfin_lq035_fb_defined.blue.offset = 0;
 762         }
 763
 764         bfin_lq035_fb.fbops = &bfin_lq035_fb_ops;
 765         bfin_lq035_fb.var = bfin_lq035_fb_defined;
 766
 767         bfin_lq035_fb.fix = bfin_lq035_fb_fix;
 768         bfin_lq035_fb.flags = FBINFO_DEFAULT;
 769
 770
 771         bfin_lq035_fb.pseudo_palette = kzalloc(sizeof(u32) * 16, GFP_KERNEL);
 772         if (bfin_lq035_fb.pseudo_palette == NULL) {
 773                 pr_err("failed to allocate pseudo_palette\n");
 774                 free_dma(CH_PPI);
 775                 free_ports();
 776                 dma_free_coherent(NULL, TOTAL_VIDEO_MEM_SIZE, fb_buffer, 0);
 777                 return -ENOMEM;
 778         }
 779
 780         if (fb_alloc_cmap(&bfin_lq035_fb.cmap, NBR_PALETTE, 0) < 0) {
 781                 pr_err("failed to allocate colormap (%d entries)\n",
 782                         NBR_PALETTE);
 783                 free_dma(CH_PPI);
 784                 free_ports();
 785                 dma_free_coherent(NULL, TOTAL_VIDEO_MEM_SIZE, fb_buffer, 0);
 786                 kfree(bfin_lq035_fb.pseudo_palette);
 787                 return -EFAULT;
 788         }
 789
 790         if (register_framebuffer(&bfin_lq035_fb) < 0) {
 791                 pr_err("unable to register framebuffer\n");
 792                 free_dma(CH_PPI);
 793                 free_ports();
 794                 dma_free_coherent(NULL, TOTAL_VIDEO_MEM_SIZE, fb_buffer, 0);
 795                 fb_buffer = NULL;
 796                 kfree(bfin_lq035_fb.pseudo_palette);
 797                 fb_dealloc_cmap(&bfin_lq035_fb.cmap);
 798                 return -EINVAL;
 799         }
 800
 801         i2c_add_driver(&ad5280_driver);
 802
 803         memset(&props, 0, sizeof(props));
 804         props.max_brightness = MAX_BRIGHENESS;
 805         bl_dev = backlight_device_register("bf537-bl", NULL, NULL,
 806                                            &bfin_lq035fb_bl_ops, &props);
 807
 808         lcd_dev = lcd_device_register(KBUILD_MODNAME, &pdev->dev, NULL,
 809                                       &bfin_lcd_ops);
 810         lcd_dev->props.max_contrast = 255,
 811
 812         pr_info("initialized");
 813
 814         return 0;
 815 }
 816
 817 static int __devexit bfin_lq035_remove(struct platform_device *pdev)
 818 {
 819         if (fb_buffer != NULL)
 820                 dma_free_coherent(NULL, TOTAL_VIDEO_MEM_SIZE, fb_buffer, 0);
 821
 822         if (L1_DATA_A_LENGTH)
 823                 l1_data_sram_free(dma_desc_table);
 824         else
 825                 dma_free_coherent(NULL, TOTAL_DMA_DESC_SIZE, NULL, 0);
 826
 827         bfin_write_TIMER_DISABLE(TIMEN_SP|TIMEN_SPS|TIMEN_PS_CLS|
 828                                  TIMEN_LP|TIMEN_REV);
 829         t_conf_done = 0;
 830
 831         free_dma(CH_PPI);
 832
 833
 834         kfree(bfin_lq035_fb.pseudo_palette);
 835         fb_dealloc_cmap(&bfin_lq035_fb.cmap);
 836
 837
 838         lcd_device_unregister(lcd_dev);
 839         backlight_device_unregister(bl_dev);
 840
 841         unregister_framebuffer(&bfin_lq035_fb);
 842         i2c_del_driver(&ad5280_driver);
 843
 844         free_ports();
 845
 846         pr_info("unregistered LCD driver\n");
 847
 848         return 0;
 849 }
 850
 851 #ifdef CONFIG_PM
 852 static int bfin_lq035_suspend(struct platform_device *pdev, pm_message_t state)
 853 {
 854         if (lq035_open_cnt > 0) {
 855                 bfin_write_PPI_CONTROL(0);
 856                 SSYNC();
 857                 disable_dma(CH_PPI);
 858         }
 859
 860         return 0;
 861 }
 862
 863 static int bfin_lq035_resume(struct platform_device *pdev)
 864 {
 865         if (lq035_open_cnt > 0) {
 866                 bfin_write_PPI_CONTROL(0);
 867                 SSYNC();
 868
 869                 config_dma();
 870                 config_ppi();
 871
 872                 enable_dma(CH_PPI);
 873                 bfin_write_PPI_CONTROL(bfin_read_PPI_CONTROL() | PORT_EN);
 874                 SSYNC();
 875
 876                 config_timers();
 877                 start_timers();
 878         } else {
 879                 t_conf_done = 0;
 880         }
 881
 882         return 0;
 883 }
 884 #else
 885 # define bfin_lq035_suspend     NULL
 886 # define bfin_lq035_resume      NULL
 887 #endif
 888
 889 static struct platform_driver bfin_lq035_driver = {
 890         .probe = bfin_lq035_probe,
 891         .remove = __devexit_p(bfin_lq035_remove),
 892         .suspend = bfin_lq035_suspend,
 893         .resume = bfin_lq035_resume,
 894         .driver = {
 895                 .name = KBUILD_MODNAME,
 896                 .owner = THIS_MODULE,
 897         },
 898 };
 899
 900 static int __init bfin_lq035_driver_init(void)
 901 {
 902         request_module("i2c-bfin-twi");
 903         return platform_driver_register(&bfin_lq035_driver);
 904 }
 905 module_init(bfin_lq035_driver_init);
 906
 907 static void __exit bfin_lq035_driver_cleanup(void)
 908 {
 909         platform_driver_unregister(&bfin_lq035_driver);
 910 }
 911 module_exit(bfin_lq035_driver_cleanup);
 912
 913 MODULE_DESCRIPTION("SHARP LQ035Q7DB03 TFT LCD Driver");
 914 MODULE_LICENSE("GPL");