fbdev: bf537-lq035: new Blackfin Sharp LQ035 framebuffer driver
authorMichael Hennerich <michael.hennerich@analog.com>
Wed, 24 Nov 2010 09:33:58 +0000 (09:33 +0000)
committerPaul Mundt <lethal@linux-sh.org>
Fri, 26 Nov 2010 06:06:34 +0000 (15:06 +0900)
For LCDs hooked up to BF537-STAMP boards.

Signed-off-by: Michael Hennerich <michael.hennerich@analog.com>
Signed-off-by: Bryan Wu <cooloney@kernel.org>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
drivers/video/Kconfig
drivers/video/Makefile
drivers/video/bf537-lq035.c [new file with mode: 0644]

index 954f6e9d8d5ab841c2ea70d9937ab3d1ee730128..04d09cac5a4d3a928d0337aaf0914cd80ded1441 100644 (file)
@@ -643,6 +643,20 @@ config FB_BFIN_LQ035Q1
          To compile this driver as a module, choose M here: the
          module will be called bfin-lq035q1-fb.
 
+config FB_BF537_LQ035
+       tristate "SHARP LQ035 TFT LCD (BF537 STAMP)"
+       depends on FB && (BF534 || BF536 || BF537) && I2C_BLACKFIN_TWI
+       select FB_CFB_FILLRECT
+       select FB_CFB_COPYAREA
+       select FB_CFB_IMAGEBLIT
+       select BFIN_GPTIMERS
+       help
+         This is the framebuffer device for a SHARP LQ035Q7DB03 TFT LCD
+         attached to a BF537.
+
+         To compile this driver as a module, choose M here: the
+         module will be called bf537-lq035.
+
 config FB_STI
        tristate "HP STI frame buffer device support"
        depends on FB && PARISC
index 8d916dcb379fda4229b151354b887409ef037164..cf1c45d2e22d29b19e04b02cc87e39262ab8ae81 100644 (file)
@@ -144,6 +144,7 @@ obj-$(CONFIG_FB_VESA)             += vesafb.o
 obj-$(CONFIG_FB_EFI)              += efifb.o
 obj-$(CONFIG_FB_VGA16)            += vga16fb.o
 obj-$(CONFIG_FB_OF)               += offb.o
+obj-$(CONFIG_FB_BF537_LQ035)      += bf537-lq035.o
 obj-$(CONFIG_FB_BF54X_LQ043)     += bf54x-lq043fb.o
 obj-$(CONFIG_FB_BFIN_LQ035Q1)     += bfin-lq035q1-fb.o
 obj-$(CONFIG_FB_BFIN_T350MCQB)   += bfin-t350mcqb-fb.o
diff --git a/drivers/video/bf537-lq035.c b/drivers/video/bf537-lq035.c
new file mode 100644 (file)
index 0000000..18c5078
--- /dev/null
@@ -0,0 +1,914 @@
+/*
+ * Analog Devices Blackfin(BF537 STAMP) + SHARP TFT LCD.
+ * http://docs.blackfin.uclinux.org/doku.php?id=hw:cards:tft-lcd
+ *
+ * Copyright 2006-2010 Analog Devices Inc.
+ * Licensed under the GPL-2.
+ */
+
+#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
+
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/errno.h>
+#include <linux/string.h>
+#include <linux/mm.h>
+#include <linux/delay.h>
+#include <linux/fb.h>
+#include <linux/ioport.h>
+#include <linux/init.h>
+#include <linux/types.h>
+#include <linux/gpio.h>
+#include <linux/interrupt.h>
+#include <linux/sched.h>
+#include <linux/timer.h>
+#include <linux/device.h>
+#include <linux/backlight.h>
+#include <linux/lcd.h>
+#include <linux/i2c.h>
+#include <linux/spinlock.h>
+#include <linux/dma-mapping.h>
+#include <linux/slab.h>
+#include <linux/platform_device.h>
+
+#include <asm/blackfin.h>
+#include <asm/irq.h>
+#include <asm/dpmc.h>
+#include <asm/dma.h>
+#include <asm/portmux.h>
+
+#define NO_BL 1
+
+#define MAX_BRIGHENESS 95
+#define MIN_BRIGHENESS 5
+#define NBR_PALETTE    256
+
+static const unsigned short ppi_pins[] = {
+       P_PPI0_CLK, P_PPI0_D0, P_PPI0_D1, P_PPI0_D2, P_PPI0_D3,
+       P_PPI0_D4, P_PPI0_D5, P_PPI0_D6, P_PPI0_D7,
+       P_PPI0_D8, P_PPI0_D9, P_PPI0_D10, P_PPI0_D11,
+       P_PPI0_D12, P_PPI0_D13, P_PPI0_D14, P_PPI0_D15, 0
+};
+
+static unsigned char *fb_buffer;          /* RGB Buffer */
+static unsigned long *dma_desc_table;
+static int t_conf_done, lq035_open_cnt;
+static DEFINE_SPINLOCK(bfin_lq035_lock);
+
+static int landscape;
+module_param(landscape, int, 0);
+MODULE_PARM_DESC(landscape,
+       "LANDSCAPE use 320x240 instead of Native 240x320 Resolution");
+
+static int bgr;
+module_param(bgr, int, 0);
+MODULE_PARM_DESC(bgr,
+       "BGR use 16-bit BGR-565 instead of RGB-565");
+
+static int nocursor = 1;
+module_param(nocursor, int, 0644);
+MODULE_PARM_DESC(nocursor, "cursor enable/disable");
+
+static unsigned long current_brightness;  /* backlight */
+
+/* AD5280 vcomm */
+static unsigned char vcomm_value = 150;
+static struct i2c_client *ad5280_client;
+
+static void set_vcomm(void)
+{
+       int nr;
+
+       if (!ad5280_client)
+               return;
+
+       nr = i2c_smbus_write_byte_data(ad5280_client, 0x00, vcomm_value);
+       if (nr)
+               pr_err("i2c_smbus_write_byte_data fail: %d\n", nr);
+}
+
+static int __devinit ad5280_probe(struct i2c_client *client,
+                                 const struct i2c_device_id *id)
+{
+       int ret;
+       if (!i2c_check_functionality(client->adapter,
+                                    I2C_FUNC_SMBUS_BYTE_DATA)) {
+               dev_err(&client->dev, "SMBUS Byte Data not Supported\n");
+               return -EIO;
+       }
+
+       ret = i2c_smbus_write_byte_data(client, 0x00, vcomm_value);
+       if (ret) {
+               dev_err(&client->dev, "write fail: %d\n", ret);
+               return ret;
+       }
+
+       ad5280_client = client;
+
+       return 0;
+}
+
+static int __devexit ad5280_remove(struct i2c_client *client)
+{
+       ad5280_client = NULL;
+       return 0;
+}
+
+static const struct i2c_device_id ad5280_id[] = {
+       {"bf537-lq035-ad5280", 0},
+       {}
+};
+
+MODULE_DEVICE_TABLE(i2c, ad5280_id);
+
+static struct i2c_driver ad5280_driver = {
+       .driver = {
+               .name = "bf537-lq035-ad5280",
+       },
+       .probe = ad5280_probe,
+       .remove = __devexit_p(ad5280_remove),
+       .id_table = ad5280_id,
+};
+
+#ifdef CONFIG_PNAV10
+#define MOD GPIO_PH13
+
+#define bfin_write_TIMER_LP_CONFIG     bfin_write_TIMER0_CONFIG
+#define bfin_write_TIMER_LP_WIDTH      bfin_write_TIMER0_WIDTH
+#define bfin_write_TIMER_LP_PERIOD     bfin_write_TIMER0_PERIOD
+#define bfin_read_TIMER_LP_COUNTER     bfin_read_TIMER0_COUNTER
+#define TIMDIS_LP                      TIMDIS0
+#define TIMEN_LP                       TIMEN0
+
+#define bfin_write_TIMER_SPS_CONFIG    bfin_write_TIMER1_CONFIG
+#define bfin_write_TIMER_SPS_WIDTH     bfin_write_TIMER1_WIDTH
+#define bfin_write_TIMER_SPS_PERIOD    bfin_write_TIMER1_PERIOD
+#define TIMDIS_SPS                     TIMDIS1
+#define TIMEN_SPS                      TIMEN1
+
+#define bfin_write_TIMER_SP_CONFIG     bfin_write_TIMER5_CONFIG
+#define bfin_write_TIMER_SP_WIDTH      bfin_write_TIMER5_WIDTH
+#define bfin_write_TIMER_SP_PERIOD     bfin_write_TIMER5_PERIOD
+#define TIMDIS_SP                      TIMDIS5
+#define TIMEN_SP                       TIMEN5
+
+#define bfin_write_TIMER_PS_CLS_CONFIG bfin_write_TIMER2_CONFIG
+#define bfin_write_TIMER_PS_CLS_WIDTH  bfin_write_TIMER2_WIDTH
+#define bfin_write_TIMER_PS_CLS_PERIOD bfin_write_TIMER2_PERIOD
+#define TIMDIS_PS_CLS                  TIMDIS2
+#define TIMEN_PS_CLS                   TIMEN2
+
+#define bfin_write_TIMER_REV_CONFIG    bfin_write_TIMER3_CONFIG
+#define bfin_write_TIMER_REV_WIDTH     bfin_write_TIMER3_WIDTH
+#define bfin_write_TIMER_REV_PERIOD    bfin_write_TIMER3_PERIOD
+#define TIMDIS_REV                     TIMDIS3
+#define TIMEN_REV                      TIMEN3
+#define bfin_read_TIMER_REV_COUNTER    bfin_read_TIMER3_COUNTER
+
+#define        FREQ_PPI_CLK         (5*1024*1024)  /* PPI_CLK 5MHz */
+
+#define TIMERS {P_TMR0, P_TMR1, P_TMR2, P_TMR3, P_TMR5, 0}
+
+#else
+
+#define UD      GPIO_PF13      /* Up / Down */
+#define MOD     GPIO_PF10
+#define LBR     GPIO_PF14      /* Left Right */
+
+#define bfin_write_TIMER_LP_CONFIG     bfin_write_TIMER6_CONFIG
+#define bfin_write_TIMER_LP_WIDTH      bfin_write_TIMER6_WIDTH
+#define bfin_write_TIMER_LP_PERIOD     bfin_write_TIMER6_PERIOD
+#define bfin_read_TIMER_LP_COUNTER     bfin_read_TIMER6_COUNTER
+#define TIMDIS_LP                      TIMDIS6
+#define TIMEN_LP                       TIMEN6
+
+#define bfin_write_TIMER_SPS_CONFIG    bfin_write_TIMER1_CONFIG
+#define bfin_write_TIMER_SPS_WIDTH     bfin_write_TIMER1_WIDTH
+#define bfin_write_TIMER_SPS_PERIOD    bfin_write_TIMER1_PERIOD
+#define TIMDIS_SPS                     TIMDIS1
+#define TIMEN_SPS                      TIMEN1
+
+#define bfin_write_TIMER_SP_CONFIG     bfin_write_TIMER0_CONFIG
+#define bfin_write_TIMER_SP_WIDTH      bfin_write_TIMER0_WIDTH
+#define bfin_write_TIMER_SP_PERIOD     bfin_write_TIMER0_PERIOD
+#define TIMDIS_SP                      TIMDIS0
+#define TIMEN_SP                       TIMEN0
+
+#define bfin_write_TIMER_PS_CLS_CONFIG bfin_write_TIMER7_CONFIG
+#define bfin_write_TIMER_PS_CLS_WIDTH  bfin_write_TIMER7_WIDTH
+#define bfin_write_TIMER_PS_CLS_PERIOD bfin_write_TIMER7_PERIOD
+#define TIMDIS_PS_CLS                  TIMDIS7
+#define TIMEN_PS_CLS                   TIMEN7
+
+#define bfin_write_TIMER_REV_CONFIG    bfin_write_TIMER5_CONFIG
+#define bfin_write_TIMER_REV_WIDTH     bfin_write_TIMER5_WIDTH
+#define bfin_write_TIMER_REV_PERIOD    bfin_write_TIMER5_PERIOD
+#define TIMDIS_REV                     TIMDIS5
+#define TIMEN_REV                      TIMEN5
+#define bfin_read_TIMER_REV_COUNTER    bfin_read_TIMER5_COUNTER
+
+#define        FREQ_PPI_CLK         (6*1000*1000)  /* PPI_CLK 6MHz */
+#define TIMERS {P_TMR0, P_TMR1, P_TMR5, P_TMR6, P_TMR7, 0}
+
+#endif
+
+#define LCD_X_RES                      240 /* Horizontal Resolution */
+#define LCD_Y_RES                      320 /* Vertical Resolution */
+
+#define LCD_BBP                                16  /* Bit Per Pixel */
+
+/* the LCD and the DMA start counting differently;
+ * since one starts at 0 and the other starts at 1,
+ * we have a difference of 1 between START_LINES
+ * and U_LINES.
+ */
+#define START_LINES       8   /* lines for field flyback or field blanking signal */
+#define U_LINES           9   /* number of undisplayed blanking lines */
+
+#define FRAMES_PER_SEC    (60)
+
+#define DCLKS_PER_FRAME   (FREQ_PPI_CLK/FRAMES_PER_SEC)
+#define DCLKS_PER_LINE    (DCLKS_PER_FRAME/(LCD_Y_RES+U_LINES))
+
+#define PPI_CONFIG_VALUE  (PORT_DIR|XFR_TYPE|DLEN_16|POLS)
+#define PPI_DELAY_VALUE   (0)
+#define TIMER_CONFIG      (PWM_OUT|PERIOD_CNT|TIN_SEL|CLK_SEL)
+
+#define ACTIVE_VIDEO_MEM_OFFSET        (LCD_X_RES*START_LINES*(LCD_BBP/8))
+#define ACTIVE_VIDEO_MEM_SIZE  (LCD_Y_RES*LCD_X_RES*(LCD_BBP/8))
+#define TOTAL_VIDEO_MEM_SIZE   ((LCD_Y_RES+U_LINES)*LCD_X_RES*(LCD_BBP/8))
+#define TOTAL_DMA_DESC_SIZE    (2 * sizeof(u32) * (LCD_Y_RES + U_LINES))
+
+static void start_timers(void) /* CHECK with HW */
+{
+       unsigned long flags;
+
+       local_irq_save(flags);
+
+       bfin_write_TIMER_ENABLE(TIMEN_REV);
+       SSYNC();
+
+       while (bfin_read_TIMER_REV_COUNTER() <= 11)
+               continue;
+       bfin_write_TIMER_ENABLE(TIMEN_LP);
+       SSYNC();
+
+       while (bfin_read_TIMER_LP_COUNTER() < 3)
+               continue;
+       bfin_write_TIMER_ENABLE(TIMEN_SP|TIMEN_SPS|TIMEN_PS_CLS);
+       SSYNC();
+       t_conf_done = 1;
+       local_irq_restore(flags);
+}
+
+static void config_timers(void)
+{
+       /* Stop timers */
+       bfin_write_TIMER_DISABLE(TIMDIS_SP|TIMDIS_SPS|TIMDIS_REV|
+                                TIMDIS_LP|TIMDIS_PS_CLS);
+       SSYNC();
+
+       /* LP, timer 6 */
+       bfin_write_TIMER_LP_CONFIG(TIMER_CONFIG|PULSE_HI);
+       bfin_write_TIMER_LP_WIDTH(1);
+
+       bfin_write_TIMER_LP_PERIOD(DCLKS_PER_LINE);
+       SSYNC();
+
+       /* SPS, timer 1 */
+       bfin_write_TIMER_SPS_CONFIG(TIMER_CONFIG|PULSE_HI);
+       bfin_write_TIMER_SPS_WIDTH(DCLKS_PER_LINE*2);
+       bfin_write_TIMER_SPS_PERIOD((DCLKS_PER_LINE * (LCD_Y_RES+U_LINES)));
+       SSYNC();
+
+       /* SP, timer 0 */
+       bfin_write_TIMER_SP_CONFIG(TIMER_CONFIG|PULSE_HI);
+       bfin_write_TIMER_SP_WIDTH(1);
+       bfin_write_TIMER_SP_PERIOD(DCLKS_PER_LINE);
+       SSYNC();
+
+       /* PS & CLS, timer 7 */
+       bfin_write_TIMER_PS_CLS_CONFIG(TIMER_CONFIG);
+       bfin_write_TIMER_PS_CLS_WIDTH(LCD_X_RES + START_LINES);
+       bfin_write_TIMER_PS_CLS_PERIOD(DCLKS_PER_LINE);
+
+       SSYNC();
+
+#ifdef NO_BL
+       /* REV, timer 5 */
+       bfin_write_TIMER_REV_CONFIG(TIMER_CONFIG|PULSE_HI);
+
+       bfin_write_TIMER_REV_WIDTH(DCLKS_PER_LINE);
+       bfin_write_TIMER_REV_PERIOD(DCLKS_PER_LINE*2);
+
+       SSYNC();
+#endif
+}
+
+static void config_ppi(void)
+{
+       bfin_write_PPI_DELAY(PPI_DELAY_VALUE);
+       bfin_write_PPI_COUNT(LCD_X_RES-1);
+       /* 0x10 -> PORT_CFG -> 2 or 3 frame syncs */
+       bfin_write_PPI_CONTROL((PPI_CONFIG_VALUE|0x10) & (~POLS));
+}
+
+static int config_dma(void)
+{
+       u32 i;
+
+       if (landscape) {
+
+               for (i = 0; i < U_LINES; ++i) {
+                       /* blanking lines point to first line of fb_buffer */
+                       dma_desc_table[2*i] = (unsigned long)&dma_desc_table[2*i+2];
+                       dma_desc_table[2*i+1] = (unsigned long)fb_buffer;
+               }
+
+               for (i = U_LINES; i < U_LINES + LCD_Y_RES; ++i) {
+                       /* visible lines */
+                       dma_desc_table[2*i] = (unsigned long)&dma_desc_table[2*i+2];
+                       dma_desc_table[2*i+1] = (unsigned long)fb_buffer +
+                                               (LCD_Y_RES+U_LINES-1-i)*2;
+               }
+
+               /* last descriptor points to first */
+               dma_desc_table[2*(LCD_Y_RES+U_LINES-1)] = (unsigned long)&dma_desc_table[0];
+
+               set_dma_x_count(CH_PPI, LCD_X_RES);
+               set_dma_x_modify(CH_PPI, LCD_Y_RES * (LCD_BBP / 8));
+               set_dma_y_count(CH_PPI, 0);
+               set_dma_y_modify(CH_PPI, 0);
+               set_dma_next_desc_addr(CH_PPI, (void *)dma_desc_table[0]);
+               set_dma_config(CH_PPI, DMAFLOW_LARGE | NDSIZE_4 | WDSIZE_16);
+
+       } else {
+
+               set_dma_config(CH_PPI, set_bfin_dma_config(DIR_READ,
+                               DMA_FLOW_AUTO,
+                               INTR_DISABLE,
+                               DIMENSION_2D,
+                               DATA_SIZE_16,
+                               DMA_NOSYNC_KEEP_DMA_BUF));
+               set_dma_x_count(CH_PPI, LCD_X_RES);
+               set_dma_x_modify(CH_PPI, LCD_BBP / 8);
+               set_dma_y_count(CH_PPI, LCD_Y_RES+U_LINES);
+               set_dma_y_modify(CH_PPI, LCD_BBP / 8);
+               set_dma_start_addr(CH_PPI, (unsigned long) fb_buffer);
+       }
+
+       return 0;
+}
+
+static int __devinit request_ports(void)
+{
+       u16 tmr_req[] = TIMERS;
+
+       /*
+               UD:      PF13
+               MOD:     PF10
+               LBR:     PF14
+               PPI_CLK: PF15
+       */
+
+       if (peripheral_request_list(ppi_pins, KBUILD_MODNAME)) {
+               pr_err("requesting PPI peripheral failed\n");
+               return -EBUSY;
+       }
+
+       if (peripheral_request_list(tmr_req, KBUILD_MODNAME)) {
+               peripheral_free_list(ppi_pins);
+               pr_err("requesting timer peripheral failed\n");
+               return -EBUSY;
+       }
+
+#if (defined(UD) && defined(LBR))
+       if (gpio_request(UD, KBUILD_MODNAME)) {
+               pr_err("requesting GPIO %d failed\n", UD);
+               return -EBUSY;
+       }
+
+       if (gpio_request(LBR, KBUILD_MODNAME)) {
+               pr_err("requesting GPIO %d failed\n", LBR);
+               gpio_free(UD);
+               return -EBUSY;
+       }
+
+       gpio_direction_output(UD, 0);
+       gpio_direction_output(LBR, 1);
+
+#endif
+
+       if (gpio_request(MOD, KBUILD_MODNAME)) {
+               pr_err("requesting GPIO %d failed\n", MOD);
+#if (defined(UD) && defined(LBR))
+               gpio_free(LBR);
+               gpio_free(UD);
+#endif
+               return -EBUSY;
+       }
+
+       gpio_direction_output(MOD, 1);
+
+       SSYNC();
+       return 0;
+}
+
+static void free_ports(void)
+{
+       u16 tmr_req[] = TIMERS;
+
+       peripheral_free_list(ppi_pins);
+       peripheral_free_list(tmr_req);
+
+#if defined(UD) && defined(LBR)
+       gpio_free(LBR);
+       gpio_free(UD);
+#endif
+       gpio_free(MOD);
+}
+
+static struct fb_info bfin_lq035_fb;
+
+static struct fb_var_screeninfo bfin_lq035_fb_defined = {
+       .bits_per_pixel         = LCD_BBP,
+       .activate               = FB_ACTIVATE_TEST,
+       .xres                   = LCD_X_RES,    /*default portrait mode RGB*/
+       .yres                   = LCD_Y_RES,
+       .xres_virtual           = LCD_X_RES,
+       .yres_virtual           = LCD_Y_RES,
+       .height                 = -1,
+       .width                  = -1,
+       .left_margin            = 0,
+       .right_margin           = 0,
+       .upper_margin           = 0,
+       .lower_margin           = 0,
+       .red                    = {11, 5, 0},
+       .green                  = {5, 6, 0},
+       .blue                   = {0, 5, 0},
+       .transp         = {0, 0, 0},
+};
+
+static struct fb_fix_screeninfo bfin_lq035_fb_fix __devinitdata = {
+       .id             = KBUILD_MODNAME,
+       .smem_len       = ACTIVE_VIDEO_MEM_SIZE,
+       .type           = FB_TYPE_PACKED_PIXELS,
+       .visual         = FB_VISUAL_TRUECOLOR,
+       .xpanstep       = 0,
+       .ypanstep       = 0,
+       .line_length    = LCD_X_RES*(LCD_BBP/8),
+       .accel          = FB_ACCEL_NONE,
+};
+
+
+static int bfin_lq035_fb_open(struct fb_info *info, int user)
+{
+       unsigned long flags;
+
+       spin_lock_irqsave(&bfin_lq035_lock, flags);
+       lq035_open_cnt++;
+       spin_unlock_irqrestore(&bfin_lq035_lock, flags);
+
+       if (lq035_open_cnt <= 1) {
+               bfin_write_PPI_CONTROL(0);
+               SSYNC();
+
+               set_vcomm();
+               config_dma();
+               config_ppi();
+
+               /* start dma */
+               enable_dma(CH_PPI);
+               SSYNC();
+               bfin_write_PPI_CONTROL(bfin_read_PPI_CONTROL() | PORT_EN);
+               SSYNC();
+
+               if (!t_conf_done) {
+                       config_timers();
+                       start_timers();
+               }
+               /* gpio_set_value(MOD,1); */
+       }
+
+       return 0;
+}
+
+static int bfin_lq035_fb_release(struct fb_info *info, int user)
+{
+       unsigned long flags;
+
+       spin_lock_irqsave(&bfin_lq035_lock, flags);
+       lq035_open_cnt--;
+       spin_unlock_irqrestore(&bfin_lq035_lock, flags);
+
+
+       if (lq035_open_cnt <= 0) {
+
+               bfin_write_PPI_CONTROL(0);
+               SSYNC();
+
+               disable_dma(CH_PPI);
+       }
+
+       return 0;
+}
+
+
+static int bfin_lq035_fb_check_var(struct fb_var_screeninfo *var,
+                                  struct fb_info *info)
+{
+       switch (var->bits_per_pixel) {
+       case 16:/* DIRECTCOLOUR, 64k */
+               var->red.offset = info->var.red.offset;
+               var->green.offset = info->var.green.offset;
+               var->blue.offset = info->var.blue.offset;
+               var->red.length = info->var.red.length;
+               var->green.length = info->var.green.length;
+               var->blue.length = info->var.blue.length;
+               var->transp.offset = 0;
+               var->transp.length = 0;
+               var->transp.msb_right = 0;
+               var->red.msb_right = 0;
+               var->green.msb_right = 0;
+               var->blue.msb_right = 0;
+               break;
+       default:
+               pr_debug("%s: depth not supported: %u BPP\n", __func__,
+                        var->bits_per_pixel);
+               return -EINVAL;
+       }
+
+       if (info->var.xres != var->xres ||
+           info->var.yres != var->yres ||
+           info->var.xres_virtual != var->xres_virtual ||
+           info->var.yres_virtual != var->yres_virtual) {
+               pr_debug("%s: Resolution not supported: X%u x Y%u\n",
+                        __func__, var->xres, var->yres);
+               return -EINVAL;
+       }
+
+       /*
+        *  Memory limit
+        */
+
+       if ((info->fix.line_length * var->yres_virtual) > info->fix.smem_len) {
+               pr_debug("%s: Memory Limit requested yres_virtual = %u\n",
+                        __func__, var->yres_virtual);
+               return -ENOMEM;
+       }
+
+       return 0;
+}
+
+/* fb_rotate
+ * Rotate the display of this angle. This doesn't seems to be used by the core,
+ * but as our hardware supports it, so why not implementing it...
+ */
+static void bfin_lq035_fb_rotate(struct fb_info *fbi, int angle)
+{
+       pr_debug("%s: %p %d", __func__, fbi, angle);
+#if (defined(UD) && defined(LBR))
+       switch (angle) {
+
+       case 180:
+               gpio_set_value(LBR, 0);
+               gpio_set_value(UD, 1);
+               break;
+       default:
+               gpio_set_value(LBR, 1);
+               gpio_set_value(UD, 0);
+               break;
+       }
+#endif
+}
+
+static int bfin_lq035_fb_cursor(struct fb_info *info, struct fb_cursor *cursor)
+{
+       if (nocursor)
+               return 0;
+       else
+               return -EINVAL; /* just to force soft_cursor() call */
+}
+
+static int bfin_lq035_fb_setcolreg(u_int regno, u_int red, u_int green,
+                                  u_int blue, u_int transp,
+                                  struct fb_info *info)
+{
+       if (regno >= NBR_PALETTE)
+               return -EINVAL;
+
+       if (info->var.grayscale)
+               /* grayscale = 0.30*R + 0.59*G + 0.11*B */
+               red = green = blue = (red * 77 + green * 151 + blue * 28) >> 8;
+
+       if (info->fix.visual == FB_VISUAL_TRUECOLOR) {
+
+               u32 value;
+               /* Place color in the pseudopalette */
+               if (regno > 16)
+                       return -EINVAL;
+
+               red   >>= (16 - info->var.red.length);
+               green >>= (16 - info->var.green.length);
+               blue  >>= (16 - info->var.blue.length);
+
+               value = (red   << info->var.red.offset) |
+                       (green << info->var.green.offset)|
+                       (blue  << info->var.blue.offset);
+               value &= 0xFFFF;
+
+               ((u32 *) (info->pseudo_palette))[regno] = value;
+
+       }
+
+       return 0;
+}
+
+static struct fb_ops bfin_lq035_fb_ops = {
+       .owner                  = THIS_MODULE,
+       .fb_open                = bfin_lq035_fb_open,
+       .fb_release             = bfin_lq035_fb_release,
+       .fb_check_var           = bfin_lq035_fb_check_var,
+       .fb_rotate              = bfin_lq035_fb_rotate,
+       .fb_fillrect            = cfb_fillrect,
+       .fb_copyarea            = cfb_copyarea,
+       .fb_imageblit           = cfb_imageblit,
+       .fb_cursor              = bfin_lq035_fb_cursor,
+       .fb_setcolreg           = bfin_lq035_fb_setcolreg,
+};
+
+static int bl_get_brightness(struct backlight_device *bd)
+{
+       return current_brightness;
+}
+
+static const struct backlight_ops bfin_lq035fb_bl_ops = {
+       .get_brightness = bl_get_brightness,
+};
+
+static struct backlight_device *bl_dev;
+
+static int bfin_lcd_get_power(struct lcd_device *dev)
+{
+       return 0;
+}
+
+static int bfin_lcd_set_power(struct lcd_device *dev, int power)
+{
+       return 0;
+}
+
+static int bfin_lcd_get_contrast(struct lcd_device *dev)
+{
+       return (int)vcomm_value;
+}
+
+static int bfin_lcd_set_contrast(struct lcd_device *dev, int contrast)
+{
+       if (contrast > 255)
+               contrast = 255;
+       if (contrast < 0)
+               contrast = 0;
+
+       vcomm_value = (unsigned char)contrast;
+       set_vcomm();
+       return 0;
+}
+
+static int bfin_lcd_check_fb(struct lcd_device *lcd, struct fb_info *fi)
+{
+       if (!fi || (fi == &bfin_lq035_fb))
+               return 1;
+       return 0;
+}
+
+static struct lcd_ops bfin_lcd_ops = {
+       .get_power      = bfin_lcd_get_power,
+       .set_power      = bfin_lcd_set_power,
+       .get_contrast   = bfin_lcd_get_contrast,
+       .set_contrast   = bfin_lcd_set_contrast,
+       .check_fb       = bfin_lcd_check_fb,
+};
+
+static struct lcd_device *lcd_dev;
+
+static int __devinit bfin_lq035_probe(struct platform_device *pdev)
+{
+       struct backlight_properties props;
+       dma_addr_t dma_handle;
+
+       if (request_dma(CH_PPI, KBUILD_MODNAME)) {
+               pr_err("couldn't request PPI DMA\n");
+               return -EFAULT;
+       }
+
+       if (request_ports()) {
+               pr_err("couldn't request gpio port\n");
+               free_dma(CH_PPI);
+               return -EFAULT;
+       }
+
+       fb_buffer = dma_alloc_coherent(NULL, TOTAL_VIDEO_MEM_SIZE,
+                                      &dma_handle, GFP_KERNEL);
+       if (fb_buffer == NULL) {
+               pr_err("couldn't allocate dma buffer\n");
+               free_dma(CH_PPI);
+               free_ports();
+               return -ENOMEM;
+       }
+
+       if (L1_DATA_A_LENGTH)
+               dma_desc_table = l1_data_sram_zalloc(TOTAL_DMA_DESC_SIZE);
+       else
+               dma_desc_table = dma_alloc_coherent(NULL, TOTAL_DMA_DESC_SIZE,
+                                                   &dma_handle, 0);
+
+       if (dma_desc_table == NULL) {
+               pr_err("couldn't allocate dma descriptor\n");
+               free_dma(CH_PPI);
+               free_ports();
+               dma_free_coherent(NULL, TOTAL_VIDEO_MEM_SIZE, fb_buffer, 0);
+               return -ENOMEM;
+       }
+
+       bfin_lq035_fb.screen_base = (void *)fb_buffer;
+       bfin_lq035_fb_fix.smem_start = (int)fb_buffer;
+       if (landscape) {
+               bfin_lq035_fb_defined.xres = LCD_Y_RES;
+               bfin_lq035_fb_defined.yres = LCD_X_RES;
+               bfin_lq035_fb_defined.xres_virtual = LCD_Y_RES;
+               bfin_lq035_fb_defined.yres_virtual = LCD_X_RES;
+
+               bfin_lq035_fb_fix.line_length = LCD_Y_RES*(LCD_BBP/8);
+       } else {
+               bfin_lq035_fb.screen_base += ACTIVE_VIDEO_MEM_OFFSET;
+               bfin_lq035_fb_fix.smem_start += ACTIVE_VIDEO_MEM_OFFSET;
+       }
+
+       bfin_lq035_fb_defined.green.msb_right = 0;
+       bfin_lq035_fb_defined.red.msb_right   = 0;
+       bfin_lq035_fb_defined.blue.msb_right  = 0;
+       bfin_lq035_fb_defined.green.offset    = 5;
+       bfin_lq035_fb_defined.green.length    = 6;
+       bfin_lq035_fb_defined.red.length      = 5;
+       bfin_lq035_fb_defined.blue.length     = 5;
+
+       if (bgr) {
+               bfin_lq035_fb_defined.red.offset  = 0;
+               bfin_lq035_fb_defined.blue.offset = 11;
+       } else {
+               bfin_lq035_fb_defined.red.offset  = 11;
+               bfin_lq035_fb_defined.blue.offset = 0;
+       }
+
+       bfin_lq035_fb.fbops = &bfin_lq035_fb_ops;
+       bfin_lq035_fb.var = bfin_lq035_fb_defined;
+
+       bfin_lq035_fb.fix = bfin_lq035_fb_fix;
+       bfin_lq035_fb.flags = FBINFO_DEFAULT;
+
+
+       bfin_lq035_fb.pseudo_palette = kzalloc(sizeof(u32) * 16, GFP_KERNEL);
+       if (bfin_lq035_fb.pseudo_palette == NULL) {
+               pr_err("failed to allocate pseudo_palette\n");
+               free_dma(CH_PPI);
+               free_ports();
+               dma_free_coherent(NULL, TOTAL_VIDEO_MEM_SIZE, fb_buffer, 0);
+               return -ENOMEM;
+       }
+
+       if (fb_alloc_cmap(&bfin_lq035_fb.cmap, NBR_PALETTE, 0) < 0) {
+               pr_err("failed to allocate colormap (%d entries)\n",
+                       NBR_PALETTE);
+               free_dma(CH_PPI);
+               free_ports();
+               dma_free_coherent(NULL, TOTAL_VIDEO_MEM_SIZE, fb_buffer, 0);
+               kfree(bfin_lq035_fb.pseudo_palette);
+               return -EFAULT;
+       }
+
+       if (register_framebuffer(&bfin_lq035_fb) < 0) {
+               pr_err("unable to register framebuffer\n");
+               free_dma(CH_PPI);
+               free_ports();
+               dma_free_coherent(NULL, TOTAL_VIDEO_MEM_SIZE, fb_buffer, 0);
+               fb_buffer = NULL;
+               kfree(bfin_lq035_fb.pseudo_palette);
+               fb_dealloc_cmap(&bfin_lq035_fb.cmap);
+               return -EINVAL;
+       }
+
+       i2c_add_driver(&ad5280_driver);
+
+       memset(&props, 0, sizeof(props));
+       props.max_brightness = MAX_BRIGHENESS;
+       bl_dev = backlight_device_register("bf537-bl", NULL, NULL,
+                                          &bfin_lq035fb_bl_ops, &props);
+
+       lcd_dev = lcd_device_register(KBUILD_MODNAME, &pdev->dev, NULL,
+                                     &bfin_lcd_ops);
+       lcd_dev->props.max_contrast = 255,
+
+       pr_info("initialized");
+
+       return 0;
+}
+
+static int __devexit bfin_lq035_remove(struct platform_device *pdev)
+{
+       if (fb_buffer != NULL)
+               dma_free_coherent(NULL, TOTAL_VIDEO_MEM_SIZE, fb_buffer, 0);
+
+       if (L1_DATA_A_LENGTH)
+               l1_data_sram_free(dma_desc_table);
+       else
+               dma_free_coherent(NULL, TOTAL_DMA_DESC_SIZE, NULL, 0);
+
+       bfin_write_TIMER_DISABLE(TIMEN_SP|TIMEN_SPS|TIMEN_PS_CLS|
+                                TIMEN_LP|TIMEN_REV);
+       t_conf_done = 0;
+
+       free_dma(CH_PPI);
+
+
+       kfree(bfin_lq035_fb.pseudo_palette);
+       fb_dealloc_cmap(&bfin_lq035_fb.cmap);
+
+
+       lcd_device_unregister(lcd_dev);
+       backlight_device_unregister(bl_dev);
+
+       unregister_framebuffer(&bfin_lq035_fb);
+       i2c_del_driver(&ad5280_driver);
+
+       free_ports();
+
+       pr_info("unregistered LCD driver\n");
+
+       return 0;
+}
+
+#ifdef CONFIG_PM
+static int bfin_lq035_suspend(struct platform_device *pdev, pm_message_t state)
+{
+       if (lq035_open_cnt > 0) {
+               bfin_write_PPI_CONTROL(0);
+               SSYNC();
+               disable_dma(CH_PPI);
+       }
+
+       return 0;
+}
+
+static int bfin_lq035_resume(struct platform_device *pdev)
+{
+       if (lq035_open_cnt > 0) {
+               bfin_write_PPI_CONTROL(0);
+               SSYNC();
+
+               config_dma();
+               config_ppi();
+
+               enable_dma(CH_PPI);
+               bfin_write_PPI_CONTROL(bfin_read_PPI_CONTROL() | PORT_EN);
+               SSYNC();
+
+               config_timers();
+               start_timers();
+       } else {
+               t_conf_done = 0;
+       }
+
+       return 0;
+}
+#else
+# define bfin_lq035_suspend    NULL
+# define bfin_lq035_resume     NULL
+#endif
+
+static struct platform_driver bfin_lq035_driver = {
+       .probe = bfin_lq035_probe,
+       .remove = __devexit_p(bfin_lq035_remove),
+       .suspend = bfin_lq035_suspend,
+       .resume = bfin_lq035_resume,
+       .driver = {
+               .name = KBUILD_MODNAME,
+               .owner = THIS_MODULE,
+       },
+};
+
+static int __init bfin_lq035_driver_init(void)
+{
+       request_module("i2c-bfin-twi");
+       return platform_driver_register(&bfin_lq035_driver);
+}
+module_init(bfin_lq035_driver_init);
+
+static void __exit bfin_lq035_driver_cleanup(void)
+{
+       platform_driver_unregister(&bfin_lq035_driver);
+}
+module_exit(bfin_lq035_driver_cleanup);
+
+MODULE_DESCRIPTION("SHARP LQ035Q7DB03 TFT LCD Driver");
+MODULE_LICENSE("GPL");