fbdev: bf537-lq035: new Blackfin Sharp LQ035 framebuffer driver

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>

1 files changed, 914 insertions, 0 deletions

diff --git a/drivers/video/bf537-lq035.c b/drivers/video/bf537-lq035.c
new file mode 100644
index 0000000..18c5078
--- /dev/null
+++ b/drivers/video/bf537-lq035.c
@@ -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");