davinci: fb: Frame Buffer driver for TI DA8xx/OMAP-L1xx

Add LCD controller (LCDC) driver for TI's DA8xx/OMAP-L1xx architecture.
LCDC specifications can be found at http://www.ti.com/litv/pdf/sprufm0a.

LCDC on DA8xx consists of two independent controllers, the Raster
Controller and the LCD Interface Display Driver (LIDD) controller.  LIDD
further supports character and graphic displays.

This patch adds support for the graphic display (Sharp LQ035Q3DG01) found
on the DA830 based EVM.  The EVM details can be found at:
http://support.spectrumdigital.com/boards/dskda830/revc/.

Signed-off-by: Sudhakar Rajashekhara <sudhakar.raj@ti.com>
Signed-off-by: Pavel Kiryukhin <pkiryukhin@ru.mvista.com>
Signed-off-by: Steve Chen <schen@mvista.com>
Acked-by: Krzysztof Helt <krzysztof.h1@wp.pl>
DESC
davinci-fb-frame-buffer-driver-for-ti-da8xx-omap-l1xx-fix
EDESC
From: Andrew Morton <akpm@linux-foundation.org>

fix kconfig indenting

Cc: Krzysztof Helt <krzysztof.h1@wp.pl>
Cc: Pavel Kiryukhin <pkiryukhin@ru.mvista.com>
Cc: Steve Chen <schen@mvista.com>
Cc: Sudhakar Rajashekhara <sudhakar.raj@ti.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

1 files changed, 909 insertions, 0 deletions

diff --git a/drivers/video/da8xx-fb.c b/drivers/video/da8xx-fb.c
new file mode 100644
index 000000000000..e0bbc66499c8
--- /dev/null
+++ b/drivers/video/da8xx-fb.c
@@ -0,0 +1,909 @@
+/*
+ * 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 {
+        wait_queue_head_t da8xx_wq;
+        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 */
+};
+
+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,
+        },
+        /* 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,
+        },
+};
+
+/* Disable the Raster Engine of the LCD Controller */
+static int lcd_disable_raster(struct da8xx_fb_par *par)
+{
+        int ret = 0;
+        u32 reg;
+
+        reg = lcdc_read(LCD_RASTER_CTRL_REG);
+        if (reg & LCD_RASTER_ENABLE) {
+                lcdc_write(reg & ~LCD_RASTER_ENABLE, LCD_RASTER_CTRL_REG);
+                ret = wait_event_interruptible_timeout(par->da8xx_wq,
+                                                !lcdc_read(LCD_STAT_REG) &
+                                                LCD_END_OF_FRAME0, WSI_TIMEOUT);
+        }
+
+        if (ret < 0)
+                return ret;
+        if (ret == 0)
+                return -ETIMEDOUT;
+
+        return 0;
+}
+
+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_END_OF_FRAME_INT_ENA, 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_pxl_clock)
+                reg |= LCD_INVERT_PIXEL_CLOCK;
+        else
+                reg &= ~LCD_INVERT_PIXEL_CLOCK;
+
+        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 int lcd_reset(struct da8xx_fb_par *par)
+{
+        int ret = 0;
+
+        /* Disable the Raster if previously Enabled */
+        if (lcdc_read(LCD_RASTER_CTRL_REG) & LCD_RASTER_ENABLE)
+                ret = lcd_disable_raster(par);
+
+        /* DMA has to be disabled */
+        lcdc_write(0, LCD_DMA_CTRL_REG);
+        lcdc_write(0, LCD_RASTER_CTRL_REG);
+
+        return ret;
+}
+
+static int lcd_init(struct da8xx_fb_par *par, const struct lcd_ctrl_config *cfg,
+                struct da8xx_panel *panel)
+{
+        u32 bpp;
+        int ret = 0;
+
+        ret = lcd_reset(par);
+        if (ret != 0)
+                return ret;
+
+        /* Configure the LCD clock divisor. */
+        lcdc_write(LCD_CLK_DIVISOR(panel->pxl_clk) |
+                        (LCD_RASTER_MODE & 0x1), LCD_CTRL_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);
+        struct da8xx_fb_par *par = arg;
+        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);
+
+        wake_up_interruptible(&par->da8xx_wq);
+        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);
+        int ret = 0;
+
+        if (info) {
+                struct da8xx_fb_par *par = info->par;
+
+                if (lcdc_read(LCD_RASTER_CTRL_REG) & LCD_RASTER_ENABLE)
+                        ret = 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 ret;
+}
+
+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 -EINVAL;
+        case FBIPUT_HSYNC:
+                if (copy_from_user(&sync_arg, (char *)arg,
+                                sizeof(struct lcd_sync_arg)))
+                        return -EINVAL;
+                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 -EINVAL;
+                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;
+
+        init_waitqueue_head(&par->da8xx_wq);
+
+        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");