bf54x-lq043fb: framebuffer driver for Blackfin BF54x framebuffer device driver (e9fa7c43) · Commits · 戴 / test

drivers/video/Kconfig

+9 −0

Original line number	Diff line number	Diff line
		@@ -544,6 +544,15 @@ config FB_VGA16
		To compile this driver as a module, choose M here: the
		module will be called vga16fb.

		config FB_BF54X_LQ043
		tristate "SHARP LQ043 TFT LCD (BF548 EZKIT)"
		depends on FB && (BF54x)
		select FB_CFB_FILLRECT
		select FB_CFB_COPYAREA
		select FB_CFB_IMAGEBLIT
		help
		This is the framebuffer device driver for a SHARP LQ043T1DG01 TFT LCD

		config FB_STI
		tristate "HP STI frame buffer device support"
		depends on FB && PARISC

drivers/video/Makefile

+1 −0

Original line number	Diff line number	Diff line
		@@ -120,6 +120,7 @@ obj-$(CONFIG_FB_VESA) += vesafb.o
		obj-$(CONFIG_FB_IMAC) += imacfb.o
		obj-$(CONFIG_FB_VGA16) += vga16fb.o
		obj-$(CONFIG_FB_OF) += offb.o
		obj-$(CONFIG_FB_BF54X_LQ043) += bf54x-lq043fb.o

		# the test framebuffer is last
		obj-$(CONFIG_FB_VIRTUAL) += vfb.o

drivers/video/bf54x-lq043fb.c

0 → 100644

+786 −0

Original line number	Diff line number	Diff line
		/*
		* File: drivers/video/bf54x-lq043.c
		* Based on:
		* Author: Michael Hennerich <hennerich@blackfin.uclinux.org>
		*
		* Created:
		* Description: ADSP-BF54x Framebufer driver
		*
		*
		* Modified:
		* Copyright 2004-2007 Analog Devices Inc.
		*
		* Bugs: Enter bugs at http://blackfin.uclinux.org/
		*
		* This program is free software; you can redistribute it and/or modify
		* it under the terms of the GNU General Public License as published by
		* the Free Software Foundation; either version 2 of the License, or
		* (at your option) any later version.
		*
		* This program is distributed in the hope that it will be useful,
		* but WITHOUT ANY WARRANTY; without even the implied warranty of
		* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
		* GNU General Public License for more details.
		*
		* You should have received a copy of the GNU General Public License
		* along with this program; if not, see the file COPYING, or write
		* to the Free Software Foundation, Inc.,
		* 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
		*/

		#include <linux/module.h>
		#include <linux/kernel.h>
		#include <linux/errno.h>
		#include <linux/string.h>
		#include <linux/mm.h>
		#include <linux/tty.h>
		#include <linux/slab.h>
		#include <linux/delay.h>
		#include <linux/fb.h>
		#include <linux/ioport.h>
		#include <linux/init.h>
		#include <linux/types.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/spinlock.h>
		#include <linux/dma-mapping.h>
		#include <linux/platform_device.h>

		#include <asm/blackfin.h>
		#include <asm/irq.h>
		#include <asm/dpmc.h>
		#include <asm/dma-mapping.h>
		#include <asm/dma.h>
		#include <asm/gpio.h>
		#include <asm/portmux.h>

		#include <asm/mach/bf54x-lq043.h>

		#define NO_BL_SUPPORT

		#define DRIVER_NAME "bf54x-lq043"
		static char driver_name[] = DRIVER_NAME;

		#define BFIN_LCD_NBR_PALETTE_ENTRIES 256

		#define EPPI0_18 {P_PPI0_CLK, P_PPI0_FS1, P_PPI0_FS2, 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, P_PPI0_D16, P_PPI0_D17, 0}

		#define EPPI0_24 {P_PPI0_D18, P_PPI0_D19, P_PPI0_D20, P_PPI0_D21, P_PPI0_D22, P_PPI0_D23, 0}

		struct bfin_bf54xfb_info {
		struct fb_info *fb;
		struct device *dev;

		struct bfin_bf54xfb_mach_info *mach_info;

		unsigned char fb_buffer; / RGB Buffer */

		dma_addr_t dma_handle;
		int lq043_mmap;
		int lq043_open_cnt;
		int irq;
		spinlock_t lock; /* lock */
		};

		static int nocursor;
		module_param(nocursor, int, 0644);
		MODULE_PARM_DESC(nocursor, "cursor enable/disable");

		static int outp_rgb666;
		module_param(outp_rgb666, int, 0);
		MODULE_PARM_DESC(outp_rgb666, "Output 18-bit RGB666");

		#define LCD_X_RES 480 /Horizontal Resolution /
		#define LCD_Y_RES 272 /* Vertical Resolution */

		#define LCD_BPP 24 /* Bit Per Pixel */
		#define DMA_BUS_SIZE 32

		/* -- Horizontal synchronizing --
		*
		* Timing characteristics taken from the SHARP LQ043T1DG01 datasheet
		* (LCY-W-06602A Page 9 of 22)
		*
		* Clock Frequency 1/Tc Min 7.83 Typ 9.00 Max 9.26 MHz
		*
		* Period TH - 525 - Clock
		* Pulse width THp - 41 - Clock
		* Horizontal period THd - 480 - Clock
		* Back porch THb - 2 - Clock
		* Front porch THf - 2 - Clock
		*
		* -- Vertical synchronizing --
		* Period TV - 286 - Line
		* Pulse width TVp - 10 - Line
		* Vertical period TVd - 272 - Line
		* Back porch TVb - 2 - Line
		* Front porch TVf - 2 - Line
		*/

		#define LCD_CLK (810001000) /* 8MHz */

		/* # active data to transfer after Horizontal Delay clock */
		#define EPPI_HCOUNT LCD_X_RES

		/* # active lines to transfer after Vertical Delay clock */
		#define EPPI_VCOUNT LCD_Y_RES

		/* Samples per Line = 480 (active data) + 45 (padding) */
		#define EPPI_LINE 525

		/* Lines per Frame = 272 (active data) + 14 (padding) */
		#define EPPI_FRAME 286

		/* FS1 (Hsync) Width (Typical)*/
		#define EPPI_FS1W_HBL 41

		/* FS1 (Hsync) Period (Typical) */
		#define EPPI_FS1P_AVPL EPPI_LINE

		/* Horizontal Delay clock after assertion of Hsync (Typical) */
		#define EPPI_HDELAY 43

		/* FS2 (Vsync) Width = FS1 (Hsync) Period * 10 */
		#define EPPI_FS2W_LVB (EPPI_LINE * 10)

		/* FS2 (Vsync) Period = FS1 (Hsync) Period * Lines per Frame */
		#define EPPI_FS2P_LAVF (EPPI_LINE * EPPI_FRAME)

		/* Vertical Delay after assertion of Vsync (2 Lines) */
		#define EPPI_VDELAY 12

		#define EPPI_CLIP 0xFF00FF00

		/* EPPI Control register configuration value for RGB out
		* - EPPI as Output
		* GP 2 frame sync mode,
		* Internal Clock generation disabled, Internal FS generation enabled,
		* Receives samples on EPPI_CLK raising edge, Transmits samples on EPPI_CLK falling edge,
		* FS1 & FS2 are active high,
		* DLEN = 6 (24 bits for RGB888 out) or 5 (18 bits for RGB666 out)
		* DMA Unpacking disabled when RGB Formating is enabled, otherwise DMA unpacking enabled
		* Swapping Enabled,
		* One (DMA) Channel Mode,
		* RGB Formatting Enabled for RGB666 output, disabled for RGB888 output
		* Regular watermark - when FIFO is 100% full,
		* Urgent watermark - when FIFO is 75% full
		*/

		#define EPPI_CONTROL (0x20136E2E \| SWAPEN)

		static inline u16 get_eppi_clkdiv(u32 target_ppi_clk)
		{
		u32 sclk = get_sclk();

		/* EPPI_CLK = (SCLK) / (2 * (EPPI_CLKDIV[15:0] + 1)) */

		return (((sclk / target_ppi_clk) / 2) - 1);
		}

		static void config_ppi(struct bfin_bf54xfb_info *fbi)
		{

		u16 eppi_clkdiv = get_eppi_clkdiv(LCD_CLK);

		bfin_write_EPPI0_FS1W_HBL(EPPI_FS1W_HBL);
		bfin_write_EPPI0_FS1P_AVPL(EPPI_FS1P_AVPL);
		bfin_write_EPPI0_FS2W_LVB(EPPI_FS2W_LVB);
		bfin_write_EPPI0_FS2P_LAVF(EPPI_FS2P_LAVF);
		bfin_write_EPPI0_CLIP(EPPI_CLIP);

		bfin_write_EPPI0_FRAME(EPPI_FRAME);
		bfin_write_EPPI0_LINE(EPPI_LINE);

		bfin_write_EPPI0_HCOUNT(EPPI_HCOUNT);
		bfin_write_EPPI0_HDELAY(EPPI_HDELAY);
		bfin_write_EPPI0_VCOUNT(EPPI_VCOUNT);
		bfin_write_EPPI0_VDELAY(EPPI_VDELAY);

		bfin_write_EPPI0_CLKDIV(eppi_clkdiv);

		/*
		* DLEN = 6 (24 bits for RGB888 out) or 5 (18 bits for RGB666 out)
		* RGB Formatting Enabled for RGB666 output, disabled for RGB888 output
		*/
		if (outp_rgb666)
		bfin_write_EPPI0_CONTROL((EPPI_CONTROL & ~DLENGTH) \| DLEN_18 \|
		RGB_FMT_EN);
		else
		bfin_write_EPPI0_CONTROL(((EPPI_CONTROL & ~DLENGTH) \| DLEN_24) &
		~RGB_FMT_EN);


		}

		static int config_dma(struct bfin_bf54xfb_info *fbi)
		{

		set_dma_config(CH_EPPI0,
		set_bfin_dma_config(DIR_READ, DMA_FLOW_AUTO,
		INTR_DISABLE, DIMENSION_2D,
		DATA_SIZE_32));
		set_dma_x_count(CH_EPPI0, (LCD_X_RES * LCD_BPP) / DMA_BUS_SIZE);
		set_dma_x_modify(CH_EPPI0, DMA_BUS_SIZE / 8);
		set_dma_y_count(CH_EPPI0, LCD_Y_RES);
		set_dma_y_modify(CH_EPPI0, DMA_BUS_SIZE / 8);
		set_dma_start_addr(CH_EPPI0, (unsigned long)fbi->fb_buffer);

		return 0;
		}

		static int request_ports(struct bfin_bf54xfb_info *fbi)
		{

		u16 eppi_req_18[] = EPPI0_18;
		u16 disp = fbi->mach_info->disp;

		if (gpio_request(disp, NULL)) {
		printk(KERN_ERR "Requesting GPIO %d faild\n", disp);
		return -EFAULT;
		}

		if (peripheral_request_list(eppi_req_18, DRIVER_NAME)) {
		printk(KERN_ERR "Requesting Peripherals faild\n");
		gpio_free(disp);
		return -EFAULT;
		}

		if (!outp_rgb666) {

		u16 eppi_req_24[] = EPPI0_24;

		if (peripheral_request_list(eppi_req_24, DRIVER_NAME)) {
		printk(KERN_ERR "Requesting Peripherals faild\n");
		peripheral_free_list(eppi_req_18);
		gpio_free(disp);
		return -EFAULT;
		}
		}

		gpio_direction_output(disp);
		gpio_set_value(disp, 1);

		return 0;
		}

		static void free_ports(struct bfin_bf54xfb_info *fbi)
		{

		u16 eppi_req_18[] = EPPI0_18;

		gpio_free(fbi->mach_info->disp);

		peripheral_free_list(eppi_req_18);

		if (!outp_rgb666) {
		u16 eppi_req_24[] = EPPI0_24;
		peripheral_free_list(eppi_req_24);
		}
		}

		static int bfin_bf54x_fb_open(struct fb_info *info, int user)
		{
		struct bfin_bf54xfb_info *fbi = info->par;

		spin_lock(&fbi->lock);
		fbi->lq043_open_cnt++;

		if (fbi->lq043_open_cnt <= 1) {

		bfin_write_EPPI0_CONTROL(0);
		SSYNC();

		config_dma(fbi);
		config_ppi(fbi);

		/* start dma */
		enable_dma(CH_EPPI0);
		bfin_write_EPPI0_CONTROL(bfin_read_EPPI0_CONTROL() \| EPPI_EN);
		}

		spin_unlock(&fbi->lock);

		return 0;
		}

		static int bfin_bf54x_fb_release(struct fb_info *info, int user)
		{
		struct bfin_bf54xfb_info *fbi = info->par;

		spin_lock(&fbi->lock);

		fbi->lq043_open_cnt--;
		fbi->lq043_mmap = 0;

		if (fbi->lq043_open_cnt <= 0) {

		bfin_write_EPPI0_CONTROL(0);
		SSYNC();
		disable_dma(CH_EPPI0);
		memset(fbi->fb_buffer, 0, info->fix.smem_len);
		}

		spin_unlock(&fbi->lock);

		return 0;
		}

		static int bfin_bf54x_fb_check_var(struct fb_var_screeninfo *var,
		struct fb_info *info)
		{

		if (var->bits_per_pixel != LCD_BPP) {
		pr_debug("%s: depth not supported: %u BPP\n", __FUNCTION__,
		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",
		__FUNCTION__, 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",
		__FUNCTION__, var->yres_virtual);
		return -ENOMEM;
		}

		return 0;
		}

		static int bfin_bf54x_fb_mmap(struct fb_info info, struct vm_area_struct vma)
		{

		struct bfin_bf54xfb_info *fbi = info->par;

		if (fbi->lq043_mmap)
		return -1;

		spin_lock(&fbi->lock);
		fbi->lq043_mmap = 1;
		spin_unlock(&fbi->lock);

		vma->vm_start = (unsigned long)(fbi->fb_buffer);

		vma->vm_end = vma->vm_start + info->fix.smem_len;
		/* For those who don't understand how mmap works, go read
		* Documentation/nommu-mmap.txt.
		* For those that do, you will know that the VM_MAYSHARE flag
		* must be set in the vma->vm_flags structure on noMMU
		* Other flags can be set, and are documented in
		* include/linux/mm.h
		*/
		vma->vm_flags \|= VM_MAYSHARE;

		return 0;
		}

		int bfin_bf54x_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_bf54x_fb_setcolreg(u_int regno, u_int red, u_int green,
		u_int blue, u_int transp,
		struct fb_info *info)
		{
		if (regno >= BFIN_LCD_NBR_PALETTE_ENTRIES)
		return -EINVAL;

		if (info->var.grayscale) {
		/* grayscale = 0.30R + 0.59G + 0.11B /
		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 &= 0xFFFFFF;

		((u32 *) (info->pseudo_palette))[regno] = value;

		}

		return 0;
		}

		static struct fb_ops bfin_bf54x_fb_ops = {
		.owner = THIS_MODULE,
		.fb_open = bfin_bf54x_fb_open,
		.fb_release = bfin_bf54x_fb_release,
		.fb_check_var = bfin_bf54x_fb_check_var,
		.fb_fillrect = cfb_fillrect,
		.fb_copyarea = cfb_copyarea,
		.fb_imageblit = cfb_imageblit,
		.fb_mmap = bfin_bf54x_fb_mmap,
		.fb_cursor = bfin_bf54x_fb_cursor,
		.fb_setcolreg = bfin_bf54x_fb_setcolreg,
		};

		#ifndef NO_BL_SUPPORT
		static int bl_get_brightness(struct backlight_device *bd)
		{
		return 0;
		}

		static struct backlight_ops bfin_lq043fb_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 0;
		}

		static int bfin_lcd_set_contrast(struct lcd_device *dev, int contrast)
		{

		return 0;
		}

		static int bfin_lcd_check_fb(struct fb_info *fi)
		{
		if (!fi \|\| (fi == &bfin_bf54x_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;
		#endif

		static irqreturn_t bfin_bf54x_irq_error(int irq, void *dev_id)
		{

		/struct bfin_bf54xfb_info info = (struct bfin_bf54xfb_info )dev_id;/

		u16 status = bfin_read_EPPI0_STATUS();

		bfin_write_EPPI0_STATUS(0xFFFF);

		if (status) {
		bfin_write_EPPI0_CONTROL(bfin_read_EPPI0_CONTROL() & ~EPPI_EN);
		disable_dma(CH_EPPI0);

		/* start dma */
		enable_dma(CH_EPPI0);
		bfin_write_EPPI0_CONTROL(bfin_read_EPPI0_CONTROL() \| EPPI_EN);
		bfin_write_EPPI0_STATUS(0xFFFF);
		}

		return IRQ_HANDLED;
		}

		static int __init bfin_bf54x_probe(struct platform_device *pdev)
		{
		struct bfin_bf54xfb_info *info;
		struct fb_info *fbinfo;
		int ret;

		printk(KERN_INFO DRIVER_NAME ": FrameBuffer initializing...\n");

		if (request_dma(CH_EPPI0, "CH_EPPI0") < 0) {
		printk(KERN_ERR DRIVER_NAME
		": couldn't request CH_EPPI0 DMA\n");
		ret = -EFAULT;
		goto out1;
		}

		fbinfo =
		framebuffer_alloc(sizeof(struct bfin_bf54xfb_info), &pdev->dev);
		if (!fbinfo) {
		ret = -ENOMEM;
		goto out2;
		}

		info = fbinfo->par;
		info->fb = fbinfo;
		info->dev = &pdev->dev;

		platform_set_drvdata(pdev, fbinfo);

		strcpy(fbinfo->fix.id, driver_name);

		info->mach_info = pdev->dev.platform_data;

		if (info->mach_info == NULL) {
		dev_err(&pdev->dev,
		"no platform data for lcd, cannot attach\n");
		ret = -EINVAL;
		goto out3;
		}

		fbinfo->fix.type = FB_TYPE_PACKED_PIXELS;
		fbinfo->fix.type_aux = 0;
		fbinfo->fix.xpanstep = 0;
		fbinfo->fix.ypanstep = 0;
		fbinfo->fix.ywrapstep = 0;
		fbinfo->fix.accel = FB_ACCEL_NONE;
		fbinfo->fix.visual = FB_VISUAL_TRUECOLOR;

		fbinfo->var.nonstd = 0;
		fbinfo->var.activate = FB_ACTIVATE_NOW;
		fbinfo->var.height = info->mach_info->height;
		fbinfo->var.width = info->mach_info->width;
		fbinfo->var.accel_flags = 0;
		fbinfo->var.vmode = FB_VMODE_NONINTERLACED;

		fbinfo->fbops = &bfin_bf54x_fb_ops;
		fbinfo->flags = FBINFO_FLAG_DEFAULT;

		fbinfo->var.xres = info->mach_info->xres.defval;
		fbinfo->var.xres_virtual = info->mach_info->xres.defval;
		fbinfo->var.yres = info->mach_info->yres.defval;
		fbinfo->var.yres_virtual = info->mach_info->yres.defval;
		fbinfo->var.bits_per_pixel = info->mach_info->bpp.defval;

		fbinfo->var.upper_margin = 0;
		fbinfo->var.lower_margin = 0;
		fbinfo->var.vsync_len = 0;

		fbinfo->var.left_margin = 0;
		fbinfo->var.right_margin = 0;
		fbinfo->var.hsync_len = 0;

		fbinfo->var.red.offset = 16;
		fbinfo->var.green.offset = 8;
		fbinfo->var.blue.offset = 0;
		fbinfo->var.transp.offset = 0;
		fbinfo->var.red.length = 8;
		fbinfo->var.green.length = 8;
		fbinfo->var.blue.length = 8;
		fbinfo->var.transp.length = 0;
		fbinfo->fix.smem_len = info->mach_info->xres.max *
		info->mach_info->yres.max * info->mach_info->bpp.max / 8;

		fbinfo->fix.line_length = fbinfo->var.xres_virtual *
		fbinfo->var.bits_per_pixel / 8;

		info->fb_buffer =
		dma_alloc_coherent(NULL, fbinfo->fix.smem_len, &info->dma_handle,
		GFP_KERNEL);

		if (NULL == info->fb_buffer) {
		printk(KERN_ERR DRIVER_NAME
		": couldn't allocate dma buffer.\n");
		ret = -ENOMEM;
		goto out3;
		}

		memset(info->fb_buffer, 0, fbinfo->fix.smem_len);

		fbinfo->screen_base = (void *)info->fb_buffer;
		fbinfo->fix.smem_start = (int)info->fb_buffer;

		fbinfo->fbops = &bfin_bf54x_fb_ops;

		fbinfo->pseudo_palette = kmalloc(sizeof(u32) * 16, GFP_KERNEL);
		if (!fbinfo->pseudo_palette) {
		printk(KERN_ERR DRIVER_NAME
		"Fail to allocate pseudo_palette\n");

		ret = -ENOMEM;
		goto out4;
		}

		memset(fbinfo->pseudo_palette, 0, sizeof(u32) * 16);

		if (fb_alloc_cmap(&fbinfo->cmap, BFIN_LCD_NBR_PALETTE_ENTRIES, 0)
		< 0) {
		printk(KERN_ERR DRIVER_NAME
		"Fail to allocate colormap (%d entries)\n",
		BFIN_LCD_NBR_PALETTE_ENTRIES);
		ret = -EFAULT;
		goto out5;
		}

		if (request_ports(info)) {
		printk(KERN_ERR DRIVER_NAME ": couldn't request gpio port.\n");
		ret = -EFAULT;
		goto out6;
		}

		info->irq = platform_get_irq(pdev, 0);
		if (info->irq < 0) {
		ret = -EINVAL;
		goto out7;
		}

		if (request_irq(info->irq, (void *)bfin_bf54x_irq_error, IRQF_DISABLED,
		"PPI ERROR", info) < 0) {
		printk(KERN_ERR DRIVER_NAME
		": unable to request PPI ERROR IRQ\n");
		ret = -EFAULT;
		goto out7;
		}

		if (register_framebuffer(fbinfo) < 0) {
		printk(KERN_ERR DRIVER_NAME
		": unable to register framebuffer.\n");
		ret = -EINVAL;
		goto out8;
		}
		#ifndef NO_BL_SUPPORT
		bl_dev =
		backlight_device_register("bf54x-bl", NULL, NULL,
		&bfin_lq043fb_bl_ops);
		bl_dev->props.max_brightness = 255;

		lcd_dev = lcd_device_register(DRIVER_NAME, NULL, &bfin_lcd_ops);
		lcd_dev->props.max_contrast = 255, printk(KERN_INFO "Done.\n");
		#endif

		return 0;

		out8:
		free_irq(info->irq, info);
		out7:
		free_ports(info);
		out6:
		fb_dealloc_cmap(&fbinfo->cmap);
		out5:
		kfree(fbinfo->pseudo_palette);
		out4:
		dma_free_coherent(NULL, fbinfo->fix.smem_len, info->fb_buffer,
		info->dma_handle);
		out3:
		framebuffer_release(fbinfo);
		out2:
		free_dma(CH_EPPI0);
		out1:
		platform_set_drvdata(pdev, NULL);

		return ret;
		}

		static int bfin_bf54x_remove(struct platform_device *pdev)
		{

		struct fb_info *fbinfo = platform_get_drvdata(pdev);
		struct bfin_bf54xfb_info *info = fbinfo->par;

		free_dma(CH_EPPI0);
		free_irq(info->irq, info);

		if (info->fb_buffer != NULL)
		dma_free_coherent(NULL, fbinfo->fix.smem_len, info->fb_buffer,
		info->dma_handle);

		kfree(fbinfo->pseudo_palette);
		fb_dealloc_cmap(&fbinfo->cmap);

		#ifndef NO_BL_SUPPORT
		lcd_device_unregister(lcd_dev);
		backlight_device_unregister(bl_dev);
		#endif

		unregister_framebuffer(fbinfo);

		free_ports(info);

		printk(KERN_INFO DRIVER_NAME ": Unregister LCD driver.\n");

		return 0;
		}

		#ifdef CONFIG_PM
		static int bfin_bf54x_suspend(struct platform_device *pdev, pm_message_t state)
		{
		struct fb_info *fbinfo = platform_get_drvdata(pdev);
		struct bfin_bf54xfb_info *info = fbinfo->par;

		bfin_write_EPPI0_CONTROL(bfin_read_EPPI0_CONTROL() & ~EPPI_EN);
		disable_dma(CH_EPPI0);
		bfin_write_EPPI0_STATUS(0xFFFF);

		return 0;
		}

		static int bfin_bf54x_resume(struct platform_device *pdev)
		{
		struct fb_info *fbinfo = platform_get_drvdata(pdev);
		struct bfin_bf54xfb_info *info = fbinfo->par;

		enable_dma(CH_EPPI0);
		bfin_write_EPPI0_CONTROL(bfin_read_EPPI0_CONTROL() \| EPPI_EN);

		return 0;
		}
		#else
		#define bfin_bf54x_suspend NULL
		#define bfin_bf54x_resume NULL
		#endif

		static struct platform_driver bfin_bf54x_driver = {
		.probe = bfin_bf54x_probe,
		.remove = bfin_bf54x_remove,
		.suspend = bfin_bf54x_suspend,
		.resume = bfin_bf54x_resume,
		.driver = {
		.name = DRIVER_NAME,
		.owner = THIS_MODULE,
		},
		};

		static int __devinit bfin_bf54x_driver_init(void)
		{
		return platform_driver_register(&bfin_bf54x_driver);
		}

		static void __exit bfin_bf54x_driver_cleanup(void)
		{
		platform_driver_unregister(&bfin_bf54x_driver);
		}

		MODULE_DESCRIPTION("Blackfin BF54x TFT LCD Driver");
		MODULE_LICENSE("GPL");

		module_init(bfin_bf54x_driver_init);
		module_exit(bfin_bf54x_driver_cleanup);

include/asm-blackfin/mach-bf548/bf54x-lq043.h

0 → 100644

+30 −0

Original line number	Diff line number	Diff line
		#ifndef BF54X_LQ043_H
		#define BF54X_LQ043_H

		struct bfin_bf54xfb_val {
		unsigned int defval;
		unsigned int min;
		unsigned int max;
		};

		struct bfin_bf54xfb_mach_info {
		unsigned char fixed_syncs; /* do not update sync/border */

		/* LCD types */
		int type;

		/* Screen size */
		int width;
		int height;

		/* Screen info */
		struct bfin_bf54xfb_val xres;
		struct bfin_bf54xfb_val yres;
		struct bfin_bf54xfb_val bpp;

		/* GPIOs */
		unsigned short disp;

		};

		#endif /* BF54X_LQ043_H */

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