diff options
Diffstat (limited to 'drivers/video/da8xx-fb.c')
| -rw-r--r-- | drivers/video/da8xx-fb.c | 890 |
1 files changed, 890 insertions, 0 deletions
diff --git a/drivers/video/da8xx-fb.c b/drivers/video/da8xx-fb.c new file mode 100644 index 000000000000..42e1005e2916 --- /dev/null +++ b/drivers/video/da8xx-fb.c @@ -0,0 +1,890 @@ +/* + * Copyright (C) 2008-2009 MontaVista Software Inc. + * Copyright (C) 2008-2009 Texas Instruments Inc + * + * Based on the LCD driver for TI Avalanche processors written by + * Ajay Singh and Shalom Hai. + * + * 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, write to the Free Software + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA + */ +#include <linux/module.h> +#include <linux/kernel.h> +#include <linux/fb.h> +#include <linux/dma-mapping.h> +#include <linux/device.h> +#include <linux/platform_device.h> +#include <linux/uaccess.h> +#include <linux/device.h> +#include <linux/interrupt.h> +#include <linux/clk.h> +#include <video/da8xx-fb.h> + +#define DRIVER_NAME "da8xx_lcdc" + +/* LCD Status Register */ +#define LCD_END_OF_FRAME0 BIT(8) +#define LCD_FIFO_UNDERFLOW BIT(5) +#define LCD_SYNC_LOST BIT(2) + +/* LCD DMA Control Register */ +#define LCD_DMA_BURST_SIZE(x) ((x) << 4) +#define LCD_DMA_BURST_1 0x0 +#define LCD_DMA_BURST_2 0x1 +#define LCD_DMA_BURST_4 0x2 +#define LCD_DMA_BURST_8 0x3 +#define LCD_DMA_BURST_16 0x4 +#define LCD_END_OF_FRAME_INT_ENA BIT(2) +#define LCD_DUAL_FRAME_BUFFER_ENABLE BIT(0) + +/* LCD Control Register */ +#define LCD_CLK_DIVISOR(x) ((x) << 8) +#define LCD_RASTER_MODE 0x01 + +/* LCD Raster Control Register */ +#define LCD_PALETTE_LOAD_MODE(x) ((x) << 20) +#define PALETTE_AND_DATA 0x00 +#define PALETTE_ONLY 0x01 + +#define LCD_MONO_8BIT_MODE BIT(9) +#define LCD_RASTER_ORDER BIT(8) +#define LCD_TFT_MODE BIT(7) +#define LCD_UNDERFLOW_INT_ENA BIT(6) +#define LCD_MONOCHROME_MODE BIT(1) +#define LCD_RASTER_ENABLE BIT(0) +#define LCD_TFT_ALT_ENABLE BIT(23) +#define LCD_STN_565_ENABLE BIT(24) + +/* LCD Raster Timing 2 Register */ +#define LCD_AC_BIAS_TRANSITIONS_PER_INT(x) ((x) << 16) +#define LCD_AC_BIAS_FREQUENCY(x) ((x) << 8) +#define LCD_SYNC_CTRL BIT(25) +#define LCD_SYNC_EDGE BIT(24) +#define LCD_INVERT_PIXEL_CLOCK BIT(22) +#define LCD_INVERT_LINE_CLOCK BIT(21) +#define LCD_INVERT_FRAME_CLOCK BIT(20) + +/* LCD Block */ +#define LCD_CTRL_REG 0x4 +#define LCD_STAT_REG 0x8 +#define LCD_RASTER_CTRL_REG 0x28 +#define LCD_RASTER_TIMING_0_REG 0x2C +#define LCD_RASTER_TIMING_1_REG 0x30 +#define LCD_RASTER_TIMING_2_REG 0x34 +#define LCD_DMA_CTRL_REG 0x40 +#define LCD_DMA_FRM_BUF_BASE_ADDR_0_REG 0x44 +#define LCD_DMA_FRM_BUF_CEILING_ADDR_0_REG 0x48 + +#define WSI_TIMEOUT 50 +#define PALETTE_SIZE 256 +#define LEFT_MARGIN 64 +#define RIGHT_MARGIN 64 +#define UPPER_MARGIN 32 +#define LOWER_MARGIN 32 + +static resource_size_t da8xx_fb_reg_base; +static struct resource *lcdc_regs; + +static inline unsigned int lcdc_read(unsigned int addr) +{ + return (unsigned int)__raw_readl(da8xx_fb_reg_base + (addr)); +} + +static inline void lcdc_write(unsigned int val, unsigned int addr) +{ + __raw_writel(val, da8xx_fb_reg_base + (addr)); +} + +struct da8xx_fb_par { + resource_size_t p_palette_base; + unsigned char *v_palette_base; + struct clk *lcdc_clk; + int irq; + unsigned short pseudo_palette[16]; + unsigned int databuf_sz; + unsigned int palette_sz; +}; + +/* Variable Screen Information */ +static struct fb_var_screeninfo da8xx_fb_var __devinitdata = { + .xoffset = 0, + .yoffset = 0, + .transp = {0, 0, 0}, + .nonstd = 0, + .activate = 0, + .height = -1, + .width = -1, + .pixclock = 46666, /* 46us - AUO display */ + .accel_flags = 0, + .left_margin = LEFT_MARGIN, + .right_margin = RIGHT_MARGIN, + .upper_margin = UPPER_MARGIN, + .lower_margin = LOWER_MARGIN, + .sync = 0, + .vmode = FB_VMODE_NONINTERLACED +}; + +static struct fb_fix_screeninfo da8xx_fb_fix __devinitdata = { + .id = "DA8xx FB Drv", + .type = FB_TYPE_PACKED_PIXELS, + .type_aux = 0, + .visual = FB_VISUAL_PSEUDOCOLOR, + .xpanstep = 1, + .ypanstep = 1, + .ywrapstep = 1, + .accel = FB_ACCEL_NONE +}; + +struct da8xx_panel { + const char name[25]; /* Full name <vendor>_<model> */ + unsigned short width; + unsigned short height; + int hfp; /* Horizontal front porch */ + int hbp; /* Horizontal back porch */ + int hsw; /* Horizontal Sync Pulse Width */ + int vfp; /* Vertical front porch */ + int vbp; /* Vertical back porch */ + int vsw; /* Vertical Sync Pulse Width */ + int pxl_clk; /* Pixel clock */ + unsigned char invert_pxl_clk; /* Invert Pixel clock */ +}; + +static struct da8xx_panel known_lcd_panels[] = { + /* Sharp LCD035Q3DG01 */ + [0] = { + .name = "Sharp_LCD035Q3DG01", + .width = 320, + .height = 240, + .hfp = 8, + .hbp = 6, + .hsw = 0, + .vfp = 2, + .vbp = 2, + .vsw = 0, + .pxl_clk = 0x10, + .invert_pxl_clk = 1, + }, + /* Sharp LK043T1DG01 */ + [1] = { + .name = "Sharp_LK043T1DG01", + .width = 480, + .height = 272, + .hfp = 2, + .hbp = 2, + .hsw = 41, + .vfp = 2, + .vbp = 2, + .vsw = 10, + .pxl_clk = 0x12, + .invert_pxl_clk = 0, + }, +}; + +/* Disable the Raster Engine of the LCD Controller */ +static void lcd_disable_raster(struct da8xx_fb_par *par) +{ + u32 reg; + + reg = lcdc_read(LCD_RASTER_CTRL_REG); + if (reg & LCD_RASTER_ENABLE) + lcdc_write(reg & ~LCD_RASTER_ENABLE, LCD_RASTER_CTRL_REG); +} + +static void lcd_blit(int load_mode, struct da8xx_fb_par *par) +{ + u32 tmp = par->p_palette_base + par->databuf_sz - 4; + u32 reg; + + /* Update the databuf in the hw. */ + lcdc_write(par->p_palette_base, LCD_DMA_FRM_BUF_BASE_ADDR_0_REG); + lcdc_write(tmp, LCD_DMA_FRM_BUF_CEILING_ADDR_0_REG); + + /* Start the DMA. */ + reg = lcdc_read(LCD_RASTER_CTRL_REG); + reg &= ~(3 << 20); + if (load_mode == LOAD_DATA) + reg |= LCD_PALETTE_LOAD_MODE(PALETTE_AND_DATA); + else if (load_mode == LOAD_PALETTE) + reg |= LCD_PALETTE_LOAD_MODE(PALETTE_ONLY); + + lcdc_write(reg, LCD_RASTER_CTRL_REG); +} + +/* Configure the Burst Size of DMA */ +static int lcd_cfg_dma(int burst_size) +{ + u32 reg; + + reg = lcdc_read(LCD_DMA_CTRL_REG) & 0x00000001; + switch (burst_size) { + case 1: + reg |= LCD_DMA_BURST_SIZE(LCD_DMA_BURST_1); + break; + case 2: + reg |= LCD_DMA_BURST_SIZE(LCD_DMA_BURST_2); + break; + case 4: + reg |= LCD_DMA_BURST_SIZE(LCD_DMA_BURST_4); + break; + case 8: + reg |= LCD_DMA_BURST_SIZE(LCD_DMA_BURST_8); + break; + case 16: + reg |= LCD_DMA_BURST_SIZE(LCD_DMA_BURST_16); + break; + default: + return -EINVAL; + } + lcdc_write(reg, LCD_DMA_CTRL_REG); + + return 0; +} + +static void lcd_cfg_ac_bias(int period, int transitions_per_int) +{ + u32 reg; + + /* Set the AC Bias Period and Number of Transisitons per Interrupt */ + reg = lcdc_read(LCD_RASTER_TIMING_2_REG) & 0xFFF00000; + reg |= LCD_AC_BIAS_FREQUENCY(period) | + LCD_AC_BIAS_TRANSITIONS_PER_INT(transitions_per_int); + lcdc_write(reg, LCD_RASTER_TIMING_2_REG); +} + +static void lcd_cfg_horizontal_sync(int back_porch, int pulse_width, + int front_porch) +{ + u32 reg; + + reg = lcdc_read(LCD_RASTER_TIMING_0_REG) & 0xf; + reg |= ((back_porch & 0xff) << 24) + | ((front_porch & 0xff) << 16) + | ((pulse_width & 0x3f) << 10); + lcdc_write(reg, LCD_RASTER_TIMING_0_REG); +} + +static void lcd_cfg_vertical_sync(int back_porch, int pulse_width, + int front_porch) +{ + u32 reg; + + reg = lcdc_read(LCD_RASTER_TIMING_1_REG) & 0x3ff; + reg |= ((back_porch & 0xff) << 24) + | ((front_porch & 0xff) << 16) + | ((pulse_width & 0x3f) << 10); + lcdc_write(reg, LCD_RASTER_TIMING_1_REG); +} + +static int lcd_cfg_display(const struct lcd_ctrl_config *cfg) +{ + u32 reg; + + reg = lcdc_read(LCD_RASTER_CTRL_REG) & ~(LCD_TFT_MODE | + LCD_MONO_8BIT_MODE | + LCD_MONOCHROME_MODE); + + switch (cfg->p_disp_panel->panel_shade) { + case MONOCHROME: + reg |= LCD_MONOCHROME_MODE; + if (cfg->mono_8bit_mode) + reg |= LCD_MONO_8BIT_MODE; + break; + case COLOR_ACTIVE: + reg |= LCD_TFT_MODE; + if (cfg->tft_alt_mode) + reg |= LCD_TFT_ALT_ENABLE; + break; + + case COLOR_PASSIVE: + if (cfg->stn_565_mode) + reg |= LCD_STN_565_ENABLE; + break; + + default: + return -EINVAL; + } + + /* enable additional interrupts here */ + reg |= LCD_UNDERFLOW_INT_ENA; + + lcdc_write(reg, LCD_RASTER_CTRL_REG); + + reg = lcdc_read(LCD_RASTER_TIMING_2_REG); + + if (cfg->sync_ctrl) + reg |= LCD_SYNC_CTRL; + else + reg &= ~LCD_SYNC_CTRL; + + if (cfg->sync_edge) + reg |= LCD_SYNC_EDGE; + else + reg &= ~LCD_SYNC_EDGE; + + if (cfg->invert_line_clock) + reg |= LCD_INVERT_LINE_CLOCK; + else + reg &= ~LCD_INVERT_LINE_CLOCK; + + if (cfg->invert_frm_clock) + reg |= LCD_INVERT_FRAME_CLOCK; + else + reg &= ~LCD_INVERT_FRAME_CLOCK; + + lcdc_write(reg, LCD_RASTER_TIMING_2_REG); + + return 0; +} + +static int lcd_cfg_frame_buffer(struct da8xx_fb_par *par, u32 width, u32 height, + u32 bpp, u32 raster_order) +{ + u32 bpl, reg; + + /* Disable Dual Frame Buffer. */ + reg = lcdc_read(LCD_DMA_CTRL_REG); + lcdc_write(reg & ~LCD_DUAL_FRAME_BUFFER_ENABLE, + LCD_DMA_CTRL_REG); + /* Set the Panel Width */ + /* Pixels per line = (PPL + 1)*16 */ + /*0x3F in bits 4..9 gives max horisontal resolution = 1024 pixels*/ + width &= 0x3f0; + reg = lcdc_read(LCD_RASTER_TIMING_0_REG); + reg &= 0xfffffc00; + reg |= ((width >> 4) - 1) << 4; + lcdc_write(reg, LCD_RASTER_TIMING_0_REG); + + /* Set the Panel Height */ + reg = lcdc_read(LCD_RASTER_TIMING_1_REG); + reg = ((height - 1) & 0x3ff) | (reg & 0xfffffc00); + lcdc_write(reg, LCD_RASTER_TIMING_1_REG); + + /* Set the Raster Order of the Frame Buffer */ + reg = lcdc_read(LCD_RASTER_CTRL_REG) & ~(1 << 8); + if (raster_order) + reg |= LCD_RASTER_ORDER; + lcdc_write(reg, LCD_RASTER_CTRL_REG); + + switch (bpp) { + case 1: + case 2: + case 4: + case 16: + par->palette_sz = 16 * 2; + break; + + case 8: + par->palette_sz = 256 * 2; + break; + + default: + return -EINVAL; + } + + bpl = width * bpp / 8; + par->databuf_sz = height * bpl + par->palette_sz; + + return 0; +} + +static int fb_setcolreg(unsigned regno, unsigned red, unsigned green, + unsigned blue, unsigned transp, + struct fb_info *info) +{ + struct da8xx_fb_par *par = info->par; + unsigned short *palette = (unsigned short *)par->v_palette_base; + u_short pal; + + if (regno > 255) + return 1; + + if (info->fix.visual == FB_VISUAL_DIRECTCOLOR) + return 1; + + if (info->var.bits_per_pixel == 8) { + red >>= 4; + green >>= 8; + blue >>= 12; + + pal = (red & 0x0f00); + pal |= (green & 0x00f0); + pal |= (blue & 0x000f); + + palette[regno] = pal; + + } else if ((info->var.bits_per_pixel == 16) && regno < 16) { + red >>= (16 - info->var.red.length); + red <<= info->var.red.offset; + + green >>= (16 - info->var.green.length); + green <<= info->var.green.offset; + + blue >>= (16 - info->var.blue.length); + blue <<= info->var.blue.offset; + + par->pseudo_palette[regno] = red | green | blue; + + palette[0] = 0x4000; + } + + return 0; +} + +static void lcd_reset(struct da8xx_fb_par *par) +{ + /* Disable the Raster if previously Enabled */ + if (lcdc_read(LCD_RASTER_CTRL_REG) & LCD_RASTER_ENABLE) + lcd_disable_raster(par); + + /* DMA has to be disabled */ + lcdc_write(0, LCD_DMA_CTRL_REG); + lcdc_write(0, LCD_RASTER_CTRL_REG); +} + +static int lcd_init(struct da8xx_fb_par *par, const struct lcd_ctrl_config *cfg, + struct da8xx_panel *panel) +{ + u32 bpp; + int ret = 0; + + lcd_reset(par); + + /* Configure the LCD clock divisor. */ + lcdc_write(LCD_CLK_DIVISOR(panel->pxl_clk) | + (LCD_RASTER_MODE & 0x1), LCD_CTRL_REG); + + if (panel->invert_pxl_clk) + lcdc_write((lcdc_read(LCD_RASTER_TIMING_2_REG) | + LCD_INVERT_PIXEL_CLOCK), LCD_RASTER_TIMING_2_REG); + else + lcdc_write((lcdc_read(LCD_RASTER_TIMING_2_REG) & + ~LCD_INVERT_PIXEL_CLOCK), LCD_RASTER_TIMING_2_REG); + + /* Configure the DMA burst size. */ + ret = lcd_cfg_dma(cfg->dma_burst_sz); + if (ret < 0) + return ret; + + /* Configure the AC bias properties. */ + lcd_cfg_ac_bias(cfg->ac_bias, cfg->ac_bias_intrpt); + + /* Configure the vertical and horizontal sync properties. */ + lcd_cfg_vertical_sync(panel->vbp, panel->vsw, panel->vfp); + lcd_cfg_horizontal_sync(panel->hbp, panel->hsw, panel->hfp); + + /* Configure for disply */ + ret = lcd_cfg_display(cfg); + if (ret < 0) + return ret; + + if (QVGA != cfg->p_disp_panel->panel_type) + return -EINVAL; + + if (cfg->bpp <= cfg->p_disp_panel->max_bpp && + cfg->bpp >= cfg->p_disp_panel->min_bpp) + bpp = cfg->bpp; + else + bpp = cfg->p_disp_panel->max_bpp; + if (bpp == 12) + bpp = 16; + ret = lcd_cfg_frame_buffer(par, (unsigned int)panel->width, + (unsigned int)panel->height, bpp, + cfg->raster_order); + if (ret < 0) + return ret; + + /* Configure FDD */ + lcdc_write((lcdc_read(LCD_RASTER_CTRL_REG) & 0xfff00fff) | + (cfg->fdd << 12), LCD_RASTER_CTRL_REG); + + return 0; +} + +static irqreturn_t lcdc_irq_handler(int irq, void *arg) +{ + u32 stat = lcdc_read(LCD_STAT_REG); + u32 reg; + + if ((stat & LCD_SYNC_LOST) && (stat & LCD_FIFO_UNDERFLOW)) { + reg = lcdc_read(LCD_RASTER_CTRL_REG); + lcdc_write(reg & ~LCD_RASTER_ENABLE, LCD_RASTER_CTRL_REG); + lcdc_write(stat, LCD_STAT_REG); + lcdc_write(reg | LCD_RASTER_ENABLE, LCD_RASTER_CTRL_REG); + } else + lcdc_write(stat, LCD_STAT_REG); + + return IRQ_HANDLED; +} + +static int fb_check_var(struct fb_var_screeninfo *var, + struct fb_info *info) +{ + int err = 0; + + switch (var->bits_per_pixel) { + case 1: + case 8: + var->red.offset = 0; + var->red.length = 8; + var->green.offset = 0; + var->green.length = 8; + var->blue.offset = 0; + var->blue.length = 8; + var->transp.offset = 0; + var->transp.length = 0; + break; + case 4: + var->red.offset = 0; + var->red.length = 4; + var->green.offset = 0; + var->green.length = 4; + var->blue.offset = 0; + var->blue.length = 4; + var->transp.offset = 0; + var->transp.length = 0; + break; + case 16: /* RGB 565 */ + var->red.offset = 0; + var->red.length = 5; + var->green.offset = 5; + var->green.length = 6; + var->blue.offset = 11; + var->blue.length = 5; + var->transp.offset = 0; + var->transp.length = 0; + break; + default: + err = -EINVAL; + } + + var->red.msb_right = 0; + var->green.msb_right = 0; + var->blue.msb_right = 0; + var->transp.msb_right = 0; + return err; +} + +static int __devexit fb_remove(struct platform_device *dev) +{ + struct fb_info *info = dev_get_drvdata(&dev->dev); + + if (info) { + struct da8xx_fb_par *par = info->par; + + if (lcdc_read(LCD_RASTER_CTRL_REG) & LCD_RASTER_ENABLE) + lcd_disable_raster(par); + lcdc_write(0, LCD_RASTER_CTRL_REG); + + /* disable DMA */ + lcdc_write(0, LCD_DMA_CTRL_REG); + + unregister_framebuffer(info); + fb_dealloc_cmap(&info->cmap); + dma_free_coherent(NULL, par->databuf_sz + PAGE_SIZE, + info->screen_base, + info->fix.smem_start); + free_irq(par->irq, par); + clk_disable(par->lcdc_clk); + clk_put(par->lcdc_clk); + framebuffer_release(info); + iounmap((void __iomem *)da8xx_fb_reg_base); + release_mem_region(lcdc_regs->start, resource_size(lcdc_regs)); + + } + return 0; +} + +static int fb_ioctl(struct fb_info *info, unsigned int cmd, + unsigned long arg) +{ + struct lcd_sync_arg sync_arg; + + switch (cmd) { + case FBIOGET_CONTRAST: + case FBIOPUT_CONTRAST: + case FBIGET_BRIGHTNESS: + case FBIPUT_BRIGHTNESS: + case FBIGET_COLOR: + case FBIPUT_COLOR: + return -ENOTTY; + case FBIPUT_HSYNC: + if (copy_from_user(&sync_arg, (char *)arg, + sizeof(struct lcd_sync_arg))) + return -EFAULT; + lcd_cfg_horizontal_sync(sync_arg.back_porch, + sync_arg.pulse_width, + sync_arg.front_porch); + break; + case FBIPUT_VSYNC: + if (copy_from_user(&sync_arg, (char *)arg, + sizeof(struct lcd_sync_arg))) + return -EFAULT; + lcd_cfg_vertical_sync(sync_arg.back_porch, + sync_arg.pulse_width, + sync_arg.front_porch); + break; + default: + return -EINVAL; + } + return 0; +} + +static struct fb_ops da8xx_fb_ops = { + .owner = THIS_MODULE, + .fb_check_var = fb_check_var, + .fb_setcolreg = fb_setcolreg, + .fb_ioctl = fb_ioctl, + .fb_fillrect = cfb_fillrect, + .fb_copyarea = cfb_copyarea, + .fb_imageblit = cfb_imageblit, +}; + +static int __init fb_probe(struct platform_device *device) +{ + struct da8xx_lcdc_platform_data *fb_pdata = + device->dev.platform_data; + struct lcd_ctrl_config *lcd_cfg; + struct da8xx_panel *lcdc_info; + struct fb_info *da8xx_fb_info; + struct clk *fb_clk = NULL; + struct da8xx_fb_par *par; + resource_size_t len; + int ret, i; + + if (fb_pdata == NULL) { + dev_err(&device->dev, "Can not get platform data\n"); + return -ENOENT; + } + + lcdc_regs = platform_get_resource(device, IORESOURCE_MEM, 0); + if (!lcdc_regs) { + dev_err(&device->dev, + "Can not get memory resource for LCD controller\n"); + return -ENOENT; + } + + len = resource_size(lcdc_regs); + + lcdc_regs = request_mem_region(lcdc_regs->start, len, lcdc_regs->name); + if (!lcdc_regs) + return -EBUSY; + + da8xx_fb_reg_base = (resource_size_t)ioremap(lcdc_regs->start, len); + if (!da8xx_fb_reg_base) { + ret = -EBUSY; + goto err_request_mem; + } + + fb_clk = clk_get(&device->dev, NULL); + if (IS_ERR(fb_clk)) { + dev_err(&device->dev, "Can not get device clock\n"); + ret = -ENODEV; + goto err_ioremap; + } + ret = clk_enable(fb_clk); + if (ret) + goto err_clk_put; + + for (i = 0, lcdc_info = known_lcd_panels; + i < ARRAY_SIZE(known_lcd_panels); + i++, lcdc_info++) { + if (strcmp(fb_pdata->type, lcdc_info->name) == 0) + break; + } + + if (i == ARRAY_SIZE(known_lcd_panels)) { + dev_err(&device->dev, "GLCD: No valid panel found\n"); + ret = ENODEV; + goto err_clk_disable; + } else + dev_info(&device->dev, "GLCD: Found %s panel\n", + fb_pdata->type); + + lcd_cfg = (struct lcd_ctrl_config *)fb_pdata->controller_data; + + da8xx_fb_info = framebuffer_alloc(sizeof(struct da8xx_fb_par), + &device->dev); + if (!da8xx_fb_info) { + dev_dbg(&device->dev, "Memory allocation failed for fb_info\n"); + ret = -ENOMEM; + goto err_clk_disable; + } + + par = da8xx_fb_info->par; + + if (lcd_init(par, lcd_cfg, lcdc_info) < 0) { + dev_err(&device->dev, "lcd_init failed\n"); + ret = -EFAULT; + goto err_release_fb; + } + + /* allocate frame buffer */ + da8xx_fb_info->screen_base = dma_alloc_coherent(NULL, + par->databuf_sz + PAGE_SIZE, + (resource_size_t *) + &da8xx_fb_info->fix.smem_start, + GFP_KERNEL | GFP_DMA); + + if (!da8xx_fb_info->screen_base) { + dev_err(&device->dev, + "GLCD: kmalloc for frame buffer failed\n"); + ret = -EINVAL; + goto err_release_fb; + } + + /* move palette base pointer by (PAGE_SIZE - palette_sz) bytes */ + par->v_palette_base = da8xx_fb_info->screen_base + + (PAGE_SIZE - par->palette_sz); + par->p_palette_base = da8xx_fb_info->fix.smem_start + + (PAGE_SIZE - par->palette_sz); + + /* the rest of the frame buffer is pixel data */ + da8xx_fb_fix.smem_start = par->p_palette_base + par->palette_sz; + da8xx_fb_fix.smem_len = par->databuf_sz - par->palette_sz; + da8xx_fb_fix.line_length = (lcdc_info->width * lcd_cfg->bpp) / 8; + + par->lcdc_clk = fb_clk; + + par->irq = platform_get_irq(device, 0); + if (par->irq < 0) { + ret = -ENOENT; + goto err_release_fb_mem; + } + + ret = request_irq(par->irq, lcdc_irq_handler, 0, DRIVER_NAME, par); + if (ret) + goto err_release_fb_mem; + + /* Initialize par */ + da8xx_fb_info->var.bits_per_pixel = lcd_cfg->bpp; + + da8xx_fb_var.xres = lcdc_info->width; + da8xx_fb_var.xres_virtual = lcdc_info->width; + + da8xx_fb_var.yres = lcdc_info->height; + da8xx_fb_var.yres_virtual = lcdc_info->height; + + da8xx_fb_var.grayscale = + lcd_cfg->p_disp_panel->panel_shade == MONOCHROME ? 1 : 0; + da8xx_fb_var.bits_per_pixel = lcd_cfg->bpp; + + da8xx_fb_var.hsync_len = lcdc_info->hsw; + da8xx_fb_var.vsync_len = lcdc_info->vsw; + + /* Initialize fbinfo */ + da8xx_fb_info->flags = FBINFO_FLAG_DEFAULT; + da8xx_fb_info->fix = da8xx_fb_fix; + da8xx_fb_info->var = da8xx_fb_var; + da8xx_fb_info->fbops = &da8xx_fb_ops; + da8xx_fb_info->pseudo_palette = par->pseudo_palette; + + ret = fb_alloc_cmap(&da8xx_fb_info->cmap, PALETTE_SIZE, 0); + if (ret) + goto err_free_irq; + + /* First palette_sz byte of the frame buffer is the palette */ + da8xx_fb_info->cmap.len = par->palette_sz; + + /* Flush the buffer to the screen. */ + lcd_blit(LOAD_DATA, par); + + /* initialize var_screeninfo */ + da8xx_fb_var.activate = FB_ACTIVATE_FORCE; + fb_set_var(da8xx_fb_info, &da8xx_fb_var); + + dev_set_drvdata(&device->dev, da8xx_fb_info); + /* Register the Frame Buffer */ + if (register_framebuffer(da8xx_fb_info) < 0) { + dev_err(&device->dev, + "GLCD: Frame Buffer Registration Failed!\n"); + ret = -EINVAL; + goto err_dealloc_cmap; + } + + /* enable raster engine */ + lcdc_write(lcdc_read(LCD_RASTER_CTRL_REG) | + LCD_RASTER_ENABLE, LCD_RASTER_CTRL_REG); + + return 0; + +err_dealloc_cmap: + fb_dealloc_cmap(&da8xx_fb_info->cmap); + +err_free_irq: + free_irq(par->irq, par); + +err_release_fb_mem: + dma_free_coherent(NULL, par->databuf_sz + PAGE_SIZE, + da8xx_fb_info->screen_base, + da8xx_fb_info->fix.smem_start); + +err_release_fb: + framebuffer_release(da8xx_fb_info); + +err_clk_disable: + clk_disable(fb_clk); + +err_clk_put: + clk_put(fb_clk); + +err_ioremap: + iounmap((void __iomem *)da8xx_fb_reg_base); + +err_request_mem: + release_mem_region(lcdc_regs->start, len); + + return ret; +} + +#ifdef CONFIG_PM +static int fb_suspend(struct platform_device *dev, pm_message_t state) +{ + return -EBUSY; +} +static int fb_resume(struct platform_device *dev) +{ + return -EBUSY; +} +#else +#define fb_suspend NULL +#define fb_resume NULL +#endif + +static struct platform_driver da8xx_fb_driver = { + .probe = fb_probe, + .remove = fb_remove, + .suspend = fb_suspend, + .resume = fb_resume, + .driver = { + .name = DRIVER_NAME, + .owner = THIS_MODULE, + }, +}; + +static int __init da8xx_fb_init(void) +{ + return platform_driver_register(&da8xx_fb_driver); +} + +static void __exit da8xx_fb_cleanup(void) +{ + platform_driver_unregister(&da8xx_fb_driver); +} + +module_init(da8xx_fb_init); +module_exit(da8xx_fb_cleanup); + +MODULE_DESCRIPTION("Framebuffer driver for TI da8xx/omap-l1xx"); +MODULE_AUTHOR("Texas Instruments"); +MODULE_LICENSE("GPL"); |