diff options
Diffstat (limited to 'drivers/video/bf537-lq035.c')
| -rw-r--r-- | drivers/video/bf537-lq035.c | 914 |
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"); |