diff options
Diffstat (limited to 'drivers/video/bf54x-lq043fb.c')
| -rw-r--r-- | drivers/video/bf54x-lq043fb.c | 786 |
1 files changed, 786 insertions, 0 deletions
diff --git a/drivers/video/bf54x-lq043fb.c b/drivers/video/bf54x-lq043fb.c new file mode 100644 index 000000000000..74d11c318987 --- /dev/null +++ b/drivers/video/bf54x-lq043fb.c @@ -0,0 +1,786 @@ +/* + * 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 (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)); + 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 = 0.30*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_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); |