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path: root/drivers/video/fbdev/bf54x-lq043fb.c
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Diffstat (limited to 'drivers/video/fbdev/bf54x-lq043fb.c')
-rw-r--r--drivers/video/fbdev/bf54x-lq043fb.c767
1 files changed, 767 insertions, 0 deletions
diff --git a/drivers/video/fbdev/bf54x-lq043fb.c b/drivers/video/fbdev/bf54x-lq043fb.c
new file mode 100644
index 00000000000..e2c42ad8515
--- /dev/null
+++ b/drivers/video/fbdev/bf54x-lq043fb.c
@@ -0,0 +1,767 @@
+/*
+ * File: drivers/video/bf54x-lq043.c
+ * Based on:
+ * Author: Michael Hennerich <hennerich@blackfin.uclinux.org>
+ *
+ * Created:
+ * Description: ADSP-BF54x Framebuffer driver
+ *
+ *
+ * Modified:
+ * Copyright 2007-2008 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 <linux/gpio.h>
+
+#include <asm/blackfin.h>
+#include <asm/irq.h>
+#include <asm/dpmc.h>
+#include <asm/dma-mapping.h>
+#include <asm/dma.h>
+#include <asm/portmux.h>
+
+#include <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_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 (8*1000*1000) /* 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,
+ DMA_NOSYNC_KEEP_DMA_BUF));
+ 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_one(disp, GPIOF_OUT_INIT_HIGH, DRIVER_NAME)) {
+ printk(KERN_ERR "Requesting GPIO %d failed\n", disp);
+ return -EFAULT;
+ }
+
+ if (peripheral_request_list(eppi_req_18, DRIVER_NAME)) {
+ printk(KERN_ERR "Requesting Peripherals failed\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 failed\n");
+ peripheral_free_list(eppi_req_18);
+ gpio_free(disp);
+ return -EFAULT;
+ }
+ }
+
+ 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--;
+
+ if (fbi->lq043_open_cnt <= 0) {
+
+ bfin_write_EPPI0_CONTROL(0);
+ SSYNC();
+ disable_dma(CH_EPPI0);
+ }
+
+ spin_unlock(&fbi->lock);
+
+ return 0;
+}
+
+static int bfin_bf54x_fb_check_var(struct fb_var_screeninfo *var,
+ struct fb_info *info)
+{
+
+ switch (var->bits_per_pixel) {
+ case 24:/* TRUECOLOUR, 16m */
+ var->red.offset = 16;
+ var->green.offset = 8;
+ var->blue.offset = 0;
+ var->red.length = var->green.length = var->blue.length = 8;
+ 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;
+}
+
+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 = 0.30*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 &= 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_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 const 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 lcd_device *dev, 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 = 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 bfin_bf54x_probe(struct platform_device *pdev)
+{
+#ifndef NO_BL_SUPPORT
+ struct backlight_properties props;
+#endif
+ 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;
+ spin_lock_init(&info->lock);
+
+ 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;
+ }
+
+ fbinfo->screen_base = (void *)info->fb_buffer;
+ fbinfo->fix.smem_start = (int)info->fb_buffer;
+
+ fbinfo->fbops = &bfin_bf54x_fb_ops;
+
+ fbinfo->pseudo_palette = devm_kzalloc(&pdev->dev, sizeof(u32) * 16,
+ GFP_KERNEL);
+ if (!fbinfo->pseudo_palette) {
+ printk(KERN_ERR DRIVER_NAME
+ "Fail to allocate pseudo_palette\n");
+
+ ret = -ENOMEM;
+ goto out4;
+ }
+
+ 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 out4;
+ }
+
+ 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, bfin_bf54x_irq_error, 0,
+ "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
+ memset(&props, 0, sizeof(struct backlight_properties));
+ props.type = BACKLIGHT_RAW;
+ props.max_brightness = 255;
+ bl_dev = backlight_device_register("bf54x-bl", NULL, NULL,
+ &bfin_lq043fb_bl_ops, &props);
+ if (IS_ERR(bl_dev)) {
+ printk(KERN_ERR DRIVER_NAME
+ ": unable to register backlight.\n");
+ ret = -EINVAL;
+ unregister_framebuffer(fbinfo);
+ goto out8;
+ }
+
+ lcd_dev = lcd_device_register(DRIVER_NAME, &pdev->dev, 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);
+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:
+
+ 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);
+
+ 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);
+
+ 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;
+
+ if (info->lq043_open_cnt) {
+
+ bfin_write_EPPI0_CONTROL(0);
+ SSYNC();
+
+ config_dma(info);
+ config_ppi(info);
+
+ /* start dma */
+ 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,
+ },
+};
+module_platform_driver(bfin_bf54x_driver);
+
+MODULE_DESCRIPTION("Blackfin BF54x TFT LCD Driver");
+MODULE_LICENSE("GPL");
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2024-11-23 13:29:56 +0000