/* * 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 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 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 = 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 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_one(UD, GPIOF_OUT_INIT_LOW, KBUILD_MODNAME)) { pr_err("requesting GPIO %d failed\n", UD); return -EBUSY; } if (gpio_request_one(LBR, GPIOF_OUT_INIT_HIGH, KBUILD_MODNAME)) { pr_err("requesting GPIO %d failed\n", LBR); gpio_free(UD); return -EBUSY; } #endif if (gpio_request_one(MOD, GPIOF_OUT_INIT_HIGH, KBUILD_MODNAME)) { pr_err("requesting GPIO %d failed\n", MOD); #if (defined(UD) && defined(LBR)) gpio_free(LBR); gpio_free(UD); #endif return -EBUSY; } 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 = { .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 bfin_lq035_probe(struct platform_device *pdev) { struct backlight_properties props; dma_addr_t dma_handle; int ret; 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"); ret = -EFAULT; goto out_ports; } 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"); ret = -ENOMEM; goto out_dma_coherent; } 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"); ret = -ENOMEM; goto out_table; } 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 = devm_kzalloc(&pdev->dev, sizeof(u32) * 16, GFP_KERNEL); if (bfin_lq035_fb.pseudo_palette == NULL) { pr_err("failed to allocate pseudo_palette\n"); ret = -ENOMEM; goto out_table; } if (fb_alloc_cmap(&bfin_lq035_fb.cmap, NBR_PALETTE, 0) < 0) { pr_err("failed to allocate colormap (%d entries)\n", NBR_PALETTE); ret = -EFAULT; goto out_table; } if (register_framebuffer(&bfin_lq035_fb) < 0) { pr_err("unable to register framebuffer\n"); ret = -EINVAL; goto out_reg; } i2c_add_driver(&ad5280_driver); memset(&props, 0, sizeof(props)); props.type = BACKLIGHT_RAW; 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); if (IS_ERR(lcd_dev)) { pr_err("unable to register lcd\n"); ret = PTR_ERR(lcd_dev); goto out_lcd; } lcd_dev->props.max_contrast = 255, pr_info("initialized"); return 0; out_lcd: unregister_framebuffer(&bfin_lq035_fb); out_reg: fb_dealloc_cmap(&bfin_lq035_fb.cmap); out_table: dma_free_coherent(NULL, TOTAL_VIDEO_MEM_SIZE, fb_buffer, 0); fb_buffer = NULL; out_dma_coherent: free_ports(); out_ports: free_dma(CH_PPI); return ret; } static int 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); 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 = bfin_lq035_remove, .suspend = bfin_lq035_suspend, .resume = bfin_lq035_resume, .driver = { .name = KBUILD_MODNAME, }, }; 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");