fb: add support of LCD display controller on pxa168/910 (base layer)
This driver is originally written by Lennert, modified by Green to be
feature complete, and ported by Jun Nie and Kevin Liu for pxa168/910
processors.
The patch adds support for the on-chip LCD display controller, it
currently supports the base (graphics) layer only.
Signed-off-by: Lennert Buytenhek <buytenh@marvell.com>
Signed-off-by: Green Wan <gwan@marvell.com>
Cc: Peter Liao <pliao@marvell.com>
Signed-off-by: Jun Nie <njun@marvell.com>
Signed-off-by: Kevin Liu <kliu5@marvell.com>
Acked-by: Krzysztof Helt <krzysztof.h1@wp.pl>
Signed-off-by: Eric Miao <eric.y.miao@gmail.com>
diff --git a/drivers/video/pxa168fb.c b/drivers/video/pxa168fb.c
new file mode 100644
index 0000000..84d8327
--- /dev/null
+++ b/drivers/video/pxa168fb.c
@@ -0,0 +1,803 @@
+/*
+ * linux/drivers/video/pxa168fb.c -- Marvell PXA168 LCD Controller
+ *
+ * Copyright (C) 2008 Marvell International Ltd.
+ * All rights reserved.
+ *
+ * 2009-02-16 adapted from original version for PXA168/910
+ * Jun Nie <njun@marvell.com>
+ *
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License. See the file COPYING in the main directory of this archive for
+ * more details.
+ */
+
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/sched.h>
+#include <linux/string.h>
+#include <linux/interrupt.h>
+#include <linux/slab.h>
+#include <linux/fb.h>
+#include <linux/delay.h>
+#include <linux/init.h>
+#include <linux/ioport.h>
+#include <linux/platform_device.h>
+#include <linux/dma-mapping.h>
+#include <linux/clk.h>
+#include <linux/err.h>
+#include <linux/uaccess.h>
+#include <video/pxa168fb.h>
+
+#include "pxa168fb.h"
+
+#define DEFAULT_REFRESH 60 /* Hz */
+
+static int determine_best_pix_fmt(struct fb_var_screeninfo *var)
+{
+ /*
+ * Pseudocolor mode?
+ */
+ if (var->bits_per_pixel == 8)
+ return PIX_FMT_PSEUDOCOLOR;
+
+ /*
+ * Check for 565/1555.
+ */
+ if (var->bits_per_pixel == 16 && var->red.length <= 5 &&
+ var->green.length <= 6 && var->blue.length <= 5) {
+ if (var->transp.length == 0) {
+ if (var->red.offset >= var->blue.offset)
+ return PIX_FMT_RGB565;
+ else
+ return PIX_FMT_BGR565;
+ }
+
+ if (var->transp.length == 1 && var->green.length <= 5) {
+ if (var->red.offset >= var->blue.offset)
+ return PIX_FMT_RGB1555;
+ else
+ return PIX_FMT_BGR1555;
+ }
+
+ /* fall through */
+ }
+
+ /*
+ * Check for 888/A888.
+ */
+ if (var->bits_per_pixel <= 32 && var->red.length <= 8 &&
+ var->green.length <= 8 && var->blue.length <= 8) {
+ if (var->bits_per_pixel == 24 && var->transp.length == 0) {
+ if (var->red.offset >= var->blue.offset)
+ return PIX_FMT_RGB888PACK;
+ else
+ return PIX_FMT_BGR888PACK;
+ }
+
+ if (var->bits_per_pixel == 32 && var->transp.length == 8) {
+ if (var->red.offset >= var->blue.offset)
+ return PIX_FMT_RGBA888;
+ else
+ return PIX_FMT_BGRA888;
+ } else {
+ if (var->red.offset >= var->blue.offset)
+ return PIX_FMT_RGB888UNPACK;
+ else
+ return PIX_FMT_BGR888UNPACK;
+ }
+
+ /* fall through */
+ }
+
+ return -EINVAL;
+}
+
+static void set_pix_fmt(struct fb_var_screeninfo *var, int pix_fmt)
+{
+ switch (pix_fmt) {
+ case PIX_FMT_RGB565:
+ var->bits_per_pixel = 16;
+ var->red.offset = 11; var->red.length = 5;
+ var->green.offset = 5; var->green.length = 6;
+ var->blue.offset = 0; var->blue.length = 5;
+ var->transp.offset = 0; var->transp.length = 0;
+ break;
+ case PIX_FMT_BGR565:
+ var->bits_per_pixel = 16;
+ 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;
+ case PIX_FMT_RGB1555:
+ var->bits_per_pixel = 16;
+ var->red.offset = 10; var->red.length = 5;
+ var->green.offset = 5; var->green.length = 5;
+ var->blue.offset = 0; var->blue.length = 5;
+ var->transp.offset = 15; var->transp.length = 1;
+ break;
+ case PIX_FMT_BGR1555:
+ var->bits_per_pixel = 16;
+ var->red.offset = 0; var->red.length = 5;
+ var->green.offset = 5; var->green.length = 5;
+ var->blue.offset = 10; var->blue.length = 5;
+ var->transp.offset = 15; var->transp.length = 1;
+ break;
+ case PIX_FMT_RGB888PACK:
+ var->bits_per_pixel = 24;
+ var->red.offset = 16; var->red.length = 8;
+ var->green.offset = 8; var->green.length = 8;
+ var->blue.offset = 0; var->blue.length = 8;
+ var->transp.offset = 0; var->transp.length = 0;
+ break;
+ case PIX_FMT_BGR888PACK:
+ var->bits_per_pixel = 24;
+ var->red.offset = 0; var->red.length = 8;
+ var->green.offset = 8; var->green.length = 8;
+ var->blue.offset = 16; var->blue.length = 8;
+ var->transp.offset = 0; var->transp.length = 0;
+ break;
+ case PIX_FMT_RGBA888:
+ var->bits_per_pixel = 32;
+ var->red.offset = 16; var->red.length = 8;
+ var->green.offset = 8; var->green.length = 8;
+ var->blue.offset = 0; var->blue.length = 8;
+ var->transp.offset = 24; var->transp.length = 8;
+ break;
+ case PIX_FMT_BGRA888:
+ var->bits_per_pixel = 32;
+ var->red.offset = 0; var->red.length = 8;
+ var->green.offset = 8; var->green.length = 8;
+ var->blue.offset = 16; var->blue.length = 8;
+ var->transp.offset = 24; var->transp.length = 8;
+ break;
+ case PIX_FMT_PSEUDOCOLOR:
+ var->bits_per_pixel = 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;
+ }
+}
+
+static void set_mode(struct pxa168fb_info *fbi, struct fb_var_screeninfo *var,
+ struct fb_videomode *mode, int pix_fmt, int ystretch)
+{
+ struct fb_info *info = fbi->info;
+
+ set_pix_fmt(var, pix_fmt);
+
+ var->xres = mode->xres;
+ var->yres = mode->yres;
+ var->xres_virtual = max(var->xres, var->xres_virtual);
+ if (ystretch)
+ var->yres_virtual = info->fix.smem_len /
+ (var->xres_virtual * (var->bits_per_pixel >> 3));
+ else
+ var->yres_virtual = max(var->yres, var->yres_virtual);
+ var->grayscale = 0;
+ var->accel_flags = FB_ACCEL_NONE;
+ var->pixclock = mode->pixclock;
+ var->left_margin = mode->left_margin;
+ var->right_margin = mode->right_margin;
+ var->upper_margin = mode->upper_margin;
+ var->lower_margin = mode->lower_margin;
+ var->hsync_len = mode->hsync_len;
+ var->vsync_len = mode->vsync_len;
+ var->sync = mode->sync;
+ var->vmode = FB_VMODE_NONINTERLACED;
+ var->rotate = FB_ROTATE_UR;
+}
+
+static int pxa168fb_check_var(struct fb_var_screeninfo *var,
+ struct fb_info *info)
+{
+ struct pxa168fb_info *fbi = info->par;
+ int pix_fmt;
+
+ /*
+ * Determine which pixel format we're going to use.
+ */
+ pix_fmt = determine_best_pix_fmt(var);
+ if (pix_fmt < 0)
+ return pix_fmt;
+ set_pix_fmt(var, pix_fmt);
+ fbi->pix_fmt = pix_fmt;
+
+ /*
+ * Basic geometry sanity checks.
+ */
+ if (var->xoffset + var->xres > var->xres_virtual)
+ return -EINVAL;
+ if (var->yoffset + var->yres > var->yres_virtual)
+ return -EINVAL;
+ if (var->xres + var->right_margin +
+ var->hsync_len + var->left_margin > 2048)
+ return -EINVAL;
+ if (var->yres + var->lower_margin +
+ var->vsync_len + var->upper_margin > 2048)
+ return -EINVAL;
+
+ /*
+ * Check size of framebuffer.
+ */
+ if (var->xres_virtual * var->yres_virtual *
+ (var->bits_per_pixel >> 3) > info->fix.smem_len)
+ return -EINVAL;
+
+ return 0;
+}
+
+/*
+ * The hardware clock divider has an integer and a fractional
+ * stage:
+ *
+ * clk2 = clk_in / integer_divider
+ * clk_out = clk2 * (1 - (fractional_divider >> 12))
+ *
+ * Calculate integer and fractional divider for given clk_in
+ * and clk_out.
+ */
+static void set_clock_divider(struct pxa168fb_info *fbi,
+ const struct fb_videomode *m)
+{
+ int divider_int;
+ int needed_pixclk;
+ u64 div_result;
+ u32 x = 0;
+
+ /*
+ * Notice: The field pixclock is used by linux fb
+ * is in pixel second. E.g. struct fb_videomode &
+ * struct fb_var_screeninfo
+ */
+
+ /*
+ * Check input values.
+ */
+ if (!m || !m->pixclock || !m->refresh) {
+ dev_err(fbi->dev, "Input refresh or pixclock is wrong.\n");
+ return;
+ }
+
+ /*
+ * Using PLL/AXI clock.
+ */
+ x = 0x80000000;
+
+ /*
+ * Calc divider according to refresh rate.
+ */
+ div_result = 1000000000000ll;
+ do_div(div_result, m->pixclock);
+ needed_pixclk = (u32)div_result;
+
+ divider_int = clk_get_rate(fbi->clk) / needed_pixclk;
+
+ /* check whether divisor is too small. */
+ if (divider_int < 2) {
+ dev_warn(fbi->dev, "Warning: clock source is too slow."
+ "Try smaller resolution\n");
+ divider_int = 2;
+ }
+
+ /*
+ * Set setting to reg.
+ */
+ x |= divider_int;
+ writel(x, fbi->reg_base + LCD_CFG_SCLK_DIV);
+}
+
+static void set_dma_control0(struct pxa168fb_info *fbi)
+{
+ u32 x;
+
+ /*
+ * Set bit to enable graphics DMA.
+ */
+ x = readl(fbi->reg_base + LCD_SPU_DMA_CTRL0);
+ x |= fbi->active ? 0x00000100 : 0;
+ fbi->active = 0;
+
+ /*
+ * If we are in a pseudo-color mode, we need to enable
+ * palette lookup.
+ */
+ if (fbi->pix_fmt == PIX_FMT_PSEUDOCOLOR)
+ x |= 0x10000000;
+
+ /*
+ * Configure hardware pixel format.
+ */
+ x &= ~(0xF << 16);
+ x |= (fbi->pix_fmt >> 1) << 16;
+
+ /*
+ * Check red and blue pixel swap.
+ * 1. source data swap
+ * 2. panel output data swap
+ */
+ x &= ~(1 << 12);
+ x |= ((fbi->pix_fmt & 1) ^ (fbi->panel_rbswap)) << 12;
+
+ writel(x, fbi->reg_base + LCD_SPU_DMA_CTRL0);
+}
+
+static void set_dma_control1(struct pxa168fb_info *fbi, int sync)
+{
+ u32 x;
+
+ /*
+ * Configure default bits: vsync triggers DMA, gated clock
+ * enable, power save enable, configure alpha registers to
+ * display 100% graphics, and set pixel command.
+ */
+ x = readl(fbi->reg_base + LCD_SPU_DMA_CTRL1);
+ x |= 0x2032ff81;
+
+ /*
+ * We trigger DMA on the falling edge of vsync if vsync is
+ * active low, or on the rising edge if vsync is active high.
+ */
+ if (!(sync & FB_SYNC_VERT_HIGH_ACT))
+ x |= 0x08000000;
+
+ writel(x, fbi->reg_base + LCD_SPU_DMA_CTRL1);
+}
+
+static void set_graphics_start(struct fb_info *info, int xoffset, int yoffset)
+{
+ struct pxa168fb_info *fbi = info->par;
+ struct fb_var_screeninfo *var = &info->var;
+ int pixel_offset;
+ unsigned long addr;
+
+ pixel_offset = (yoffset * var->xres_virtual) + xoffset;
+
+ addr = fbi->fb_start_dma + (pixel_offset * (var->bits_per_pixel >> 3));
+ writel(addr, fbi->reg_base + LCD_CFG_GRA_START_ADDR0);
+}
+
+static void set_dumb_panel_control(struct fb_info *info)
+{
+ struct pxa168fb_info *fbi = info->par;
+ struct pxa168fb_mach_info *mi = fbi->dev->platform_data;
+ u32 x;
+
+ /*
+ * Preserve enable flag.
+ */
+ x = readl(fbi->reg_base + LCD_SPU_DUMB_CTRL) & 0x00000001;
+
+ x |= (fbi->is_blanked ? 0x7 : mi->dumb_mode) << 28;
+ x |= mi->gpio_output_data << 20;
+ x |= mi->gpio_output_mask << 12;
+ x |= mi->panel_rgb_reverse_lanes ? 0x00000080 : 0;
+ x |= mi->invert_composite_blank ? 0x00000040 : 0;
+ x |= (info->var.sync & FB_SYNC_COMP_HIGH_ACT) ? 0x00000020 : 0;
+ x |= mi->invert_pix_val_ena ? 0x00000010 : 0;
+ x |= (info->var.sync & FB_SYNC_VERT_HIGH_ACT) ? 0 : 0x00000008;
+ x |= (info->var.sync & FB_SYNC_HOR_HIGH_ACT) ? 0 : 0x00000004;
+ x |= mi->invert_pixclock ? 0x00000002 : 0;
+
+ writel(x, fbi->reg_base + LCD_SPU_DUMB_CTRL);
+}
+
+static void set_dumb_screen_dimensions(struct fb_info *info)
+{
+ struct pxa168fb_info *fbi = info->par;
+ struct fb_var_screeninfo *v = &info->var;
+ int x;
+ int y;
+
+ x = v->xres + v->right_margin + v->hsync_len + v->left_margin;
+ y = v->yres + v->lower_margin + v->vsync_len + v->upper_margin;
+
+ writel((y << 16) | x, fbi->reg_base + LCD_SPUT_V_H_TOTAL);
+}
+
+static int pxa168fb_set_par(struct fb_info *info)
+{
+ struct pxa168fb_info *fbi = info->par;
+ struct fb_var_screeninfo *var = &info->var;
+ struct fb_videomode mode;
+ u32 x;
+ struct pxa168fb_mach_info *mi;
+
+ mi = fbi->dev->platform_data;
+
+ /*
+ * Set additional mode info.
+ */
+ if (fbi->pix_fmt == PIX_FMT_PSEUDOCOLOR)
+ info->fix.visual = FB_VISUAL_PSEUDOCOLOR;
+ else
+ info->fix.visual = FB_VISUAL_TRUECOLOR;
+ info->fix.line_length = var->xres_virtual * var->bits_per_pixel / 8;
+ info->fix.ypanstep = var->yres;
+
+ /*
+ * Disable panel output while we setup the display.
+ */
+ x = readl(fbi->reg_base + LCD_SPU_DUMB_CTRL);
+ writel(x & ~1, fbi->reg_base + LCD_SPU_DUMB_CTRL);
+
+ /*
+ * Configure global panel parameters.
+ */
+ writel((var->yres << 16) | var->xres,
+ fbi->reg_base + LCD_SPU_V_H_ACTIVE);
+
+ /*
+ * convet var to video mode
+ */
+ fb_var_to_videomode(&mode, &info->var);
+
+ /* Calculate clock divisor. */
+ set_clock_divider(fbi, &mode);
+
+ /* Configure dma ctrl regs. */
+ set_dma_control0(fbi);
+ set_dma_control1(fbi, info->var.sync);
+
+ /*
+ * Configure graphics DMA parameters.
+ */
+ x = readl(fbi->reg_base + LCD_CFG_GRA_PITCH);
+ x = (x & ~0xFFFF) | ((var->xres_virtual * var->bits_per_pixel) >> 3);
+ writel(x, fbi->reg_base + LCD_CFG_GRA_PITCH);
+ writel((var->yres << 16) | var->xres,
+ fbi->reg_base + LCD_SPU_GRA_HPXL_VLN);
+ writel((var->yres << 16) | var->xres,
+ fbi->reg_base + LCD_SPU_GZM_HPXL_VLN);
+
+ /*
+ * Configure dumb panel ctrl regs & timings.
+ */
+ set_dumb_panel_control(info);
+ set_dumb_screen_dimensions(info);
+
+ writel((var->left_margin << 16) | var->right_margin,
+ fbi->reg_base + LCD_SPU_H_PORCH);
+ writel((var->upper_margin << 16) | var->lower_margin,
+ fbi->reg_base + LCD_SPU_V_PORCH);
+
+ /*
+ * Re-enable panel output.
+ */
+ x = readl(fbi->reg_base + LCD_SPU_DUMB_CTRL);
+ writel(x | 1, fbi->reg_base + LCD_SPU_DUMB_CTRL);
+
+ return 0;
+}
+
+static unsigned int chan_to_field(unsigned int chan, struct fb_bitfield *bf)
+{
+ return ((chan & 0xffff) >> (16 - bf->length)) << bf->offset;
+}
+
+static u32 to_rgb(u16 red, u16 green, u16 blue)
+{
+ red >>= 8;
+ green >>= 8;
+ blue >>= 8;
+
+ return (red << 16) | (green << 8) | blue;
+}
+
+static int
+pxa168fb_setcolreg(unsigned int regno, unsigned int red, unsigned int green,
+ unsigned int blue, unsigned int trans, struct fb_info *info)
+{
+ struct pxa168fb_info *fbi = info->par;
+ u32 val;
+
+ if (info->var.grayscale)
+ red = green = blue = (19595 * red + 38470 * green +
+ 7471 * blue) >> 16;
+
+ if (info->fix.visual == FB_VISUAL_TRUECOLOR && regno < 16) {
+ val = chan_to_field(red, &info->var.red);
+ val |= chan_to_field(green, &info->var.green);
+ val |= chan_to_field(blue , &info->var.blue);
+ fbi->pseudo_palette[regno] = val;
+ }
+
+ if (info->fix.visual == FB_VISUAL_PSEUDOCOLOR && regno < 256) {
+ val = to_rgb(red, green, blue);
+ writel(val, fbi->reg_base + LCD_SPU_SRAM_WRDAT);
+ writel(0x8300 | regno, fbi->reg_base + LCD_SPU_SRAM_CTRL);
+ }
+
+ return 0;
+}
+
+static int pxa168fb_blank(int blank, struct fb_info *info)
+{
+ struct pxa168fb_info *fbi = info->par;
+
+ fbi->is_blanked = (blank == FB_BLANK_UNBLANK) ? 0 : 1;
+ set_dumb_panel_control(info);
+
+ return 0;
+}
+
+static int pxa168fb_pan_display(struct fb_var_screeninfo *var,
+ struct fb_info *info)
+{
+ set_graphics_start(info, var->xoffset, var->yoffset);
+
+ return 0;
+}
+
+static irqreturn_t pxa168fb_handle_irq(int irq, void *dev_id)
+{
+ struct pxa168fb_info *fbi = dev_id;
+ u32 isr = readl(fbi->reg_base + SPU_IRQ_ISR);
+
+ if ((isr & GRA_FRAME_IRQ0_ENA_MASK)) {
+
+ writel(isr & (~GRA_FRAME_IRQ0_ENA_MASK),
+ fbi->reg_base + SPU_IRQ_ISR);
+
+ return IRQ_HANDLED;
+ }
+ return IRQ_NONE;
+}
+
+static struct fb_ops pxa168fb_ops = {
+ .owner = THIS_MODULE,
+ .fb_check_var = pxa168fb_check_var,
+ .fb_set_par = pxa168fb_set_par,
+ .fb_setcolreg = pxa168fb_setcolreg,
+ .fb_blank = pxa168fb_blank,
+ .fb_pan_display = pxa168fb_pan_display,
+ .fb_fillrect = cfb_fillrect,
+ .fb_copyarea = cfb_copyarea,
+ .fb_imageblit = cfb_imageblit,
+};
+
+static int __init pxa168fb_init_mode(struct fb_info *info,
+ struct pxa168fb_mach_info *mi)
+{
+ struct pxa168fb_info *fbi = info->par;
+ struct fb_var_screeninfo *var = &info->var;
+ int ret = 0;
+ u32 total_w, total_h, refresh;
+ u64 div_result;
+ const struct fb_videomode *m;
+
+ /*
+ * Set default value
+ */
+ refresh = DEFAULT_REFRESH;
+
+ /* try to find best video mode. */
+ m = fb_find_best_mode(&info->var, &info->modelist);
+ if (m)
+ fb_videomode_to_var(&info->var, m);
+
+ /* Init settings. */
+ var->xres_virtual = var->xres;
+ var->yres_virtual = info->fix.smem_len /
+ (var->xres_virtual * (var->bits_per_pixel >> 3));
+ dev_dbg(fbi->dev, "pxa168fb: find best mode: res = %dx%d\n",
+ var->xres, var->yres);
+
+ /* correct pixclock. */
+ total_w = var->xres + var->left_margin + var->right_margin +
+ var->hsync_len;
+ total_h = var->yres + var->upper_margin + var->lower_margin +
+ var->vsync_len;
+
+ div_result = 1000000000000ll;
+ do_div(div_result, total_w * total_h * refresh);
+ var->pixclock = (u32)div_result;
+
+ return ret;
+}
+
+static int __init pxa168fb_probe(struct platform_device *pdev)
+{
+ struct pxa168fb_mach_info *mi;
+ struct fb_info *info = 0;
+ struct pxa168fb_info *fbi = 0;
+ struct resource *res;
+ struct clk *clk;
+ int irq, ret;
+
+ mi = pdev->dev.platform_data;
+ if (mi == NULL) {
+ dev_err(&pdev->dev, "no platform data defined\n");
+ return -EINVAL;
+ }
+
+ clk = clk_get(&pdev->dev, "LCDCLK");
+ if (IS_ERR(clk)) {
+ dev_err(&pdev->dev, "unable to get LCDCLK");
+ return PTR_ERR(clk);
+ }
+
+ res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ if (res == NULL) {
+ dev_err(&pdev->dev, "no IO memory defined\n");
+ return -ENOENT;
+ }
+
+ irq = platform_get_irq(pdev, 0);
+ if (irq < 0) {
+ dev_err(&pdev->dev, "no IRQ defined\n");
+ return -ENOENT;
+ }
+
+ info = framebuffer_alloc(sizeof(struct pxa168fb_info), &pdev->dev);
+ if (info == NULL) {
+ clk_put(clk);
+ return -ENOMEM;
+ }
+
+ /* Initialize private data */
+ fbi = info->par;
+ fbi->info = info;
+ fbi->clk = clk;
+ fbi->dev = info->dev = &pdev->dev;
+ fbi->panel_rbswap = mi->panel_rbswap;
+ fbi->is_blanked = 0;
+ fbi->active = mi->active;
+
+ /*
+ * Initialise static fb parameters.
+ */
+ info->flags = FBINFO_DEFAULT | FBINFO_PARTIAL_PAN_OK |
+ FBINFO_HWACCEL_XPAN | FBINFO_HWACCEL_YPAN;
+ info->node = -1;
+ strlcpy(info->fix.id, mi->id, 16);
+ info->fix.type = FB_TYPE_PACKED_PIXELS;
+ info->fix.type_aux = 0;
+ info->fix.xpanstep = 0;
+ info->fix.ypanstep = 0;
+ info->fix.ywrapstep = 0;
+ info->fix.mmio_start = res->start;
+ info->fix.mmio_len = res->end - res->start + 1;
+ info->fix.accel = FB_ACCEL_NONE;
+ info->fbops = &pxa168fb_ops;
+ info->pseudo_palette = fbi->pseudo_palette;
+
+ /*
+ * Map LCD controller registers.
+ */
+ fbi->reg_base = ioremap_nocache(res->start, res->end - res->start);
+ if (fbi->reg_base == NULL) {
+ ret = -ENOMEM;
+ goto failed;
+ }
+
+ /*
+ * Allocate framebuffer memory.
+ */
+ info->fix.smem_len = PAGE_ALIGN(DEFAULT_FB_SIZE);
+
+ info->screen_base = dma_alloc_writecombine(fbi->dev, info->fix.smem_len,
+ &fbi->fb_start_dma, GFP_KERNEL);
+ if (info->screen_base == NULL) {
+ ret = -ENOMEM;
+ goto failed;
+ }
+
+ info->fix.smem_start = (unsigned long)fbi->fb_start_dma;
+
+ /*
+ * Set video mode according to platform data.
+ */
+ set_mode(fbi, &info->var, mi->modes, mi->pix_fmt, 1);
+
+ fb_videomode_to_modelist(mi->modes, mi->num_modes, &info->modelist);
+
+ /*
+ * init video mode data.
+ */
+ pxa168fb_init_mode(info, mi);
+
+ ret = pxa168fb_check_var(&info->var, info);
+ if (ret)
+ goto failed_free_fbmem;
+
+ /*
+ * Fill in sane defaults.
+ */
+ ret = pxa168fb_check_var(&info->var, info);
+ if (ret)
+ goto failed;
+
+ /*
+ * enable controller clock
+ */
+ clk_enable(fbi->clk);
+
+ pxa168fb_set_par(info);
+
+ /*
+ * Configure default register values.
+ */
+ writel(0, fbi->reg_base + LCD_SPU_BLANKCOLOR);
+ writel(mi->io_pin_allocation_mode, fbi->reg_base + SPU_IOPAD_CONTROL);
+ writel(0, fbi->reg_base + LCD_CFG_GRA_START_ADDR1);
+ writel(0, fbi->reg_base + LCD_SPU_GRA_OVSA_HPXL_VLN);
+ writel(0, fbi->reg_base + LCD_SPU_SRAM_PARA0);
+ writel(CFG_CSB_256x32(0x1)|CFG_CSB_256x24(0x1)|CFG_CSB_256x8(0x1),
+ fbi->reg_base + LCD_SPU_SRAM_PARA1);
+
+ /*
+ * Allocate color map.
+ */
+ if (fb_alloc_cmap(&info->cmap, 256, 0) < 0) {
+ ret = -ENOMEM;
+ goto failed_free_clk;
+ }
+
+ /*
+ * Register irq handler.
+ */
+ ret = request_irq(irq, pxa168fb_handle_irq, IRQF_SHARED,
+ info->fix.id, fbi);
+ if (ret < 0) {
+ dev_err(&pdev->dev, "unable to request IRQ\n");
+ ret = -ENXIO;
+ goto failed_free_cmap;
+ }
+
+ /*
+ * Enable GFX interrupt
+ */
+ writel(GRA_FRAME_IRQ0_ENA(0x1), fbi->reg_base + SPU_IRQ_ENA);
+
+ /*
+ * Register framebuffer.
+ */
+ ret = register_framebuffer(info);
+ if (ret < 0) {
+ dev_err(&pdev->dev, "Failed to register pxa168-fb: %d\n", ret);
+ ret = -ENXIO;
+ goto failed_free_irq;
+ }
+
+ platform_set_drvdata(pdev, fbi);
+ return 0;
+
+failed_free_irq:
+ free_irq(irq, fbi);
+failed_free_cmap:
+ fb_dealloc_cmap(&info->cmap);
+failed_free_clk:
+ clk_disable(fbi->clk);
+failed_free_fbmem:
+ dma_free_coherent(fbi->dev, info->fix.smem_len,
+ info->screen_base, fbi->fb_start_dma);
+failed:
+ kfree(info);
+ clk_put(clk);
+
+ dev_err(&pdev->dev, "frame buffer device init failed with %d\n", ret);
+ return ret;
+}
+
+static struct platform_driver pxa168fb_driver = {
+ .driver = {
+ .name = "pxa168-fb",
+ .owner = THIS_MODULE,
+ },
+ .probe = pxa168fb_probe,
+};
+
+static int __devinit pxa168fb_init(void)
+{
+ return platform_driver_register(&pxa168fb_driver);
+}
+module_init(pxa168fb_init);
+
+MODULE_AUTHOR("Lennert Buytenhek <buytenh@marvell.com> "
+ "Green Wan <gwan@marvell.com>");
+MODULE_DESCRIPTION("Framebuffer driver for PXA168/910");
+MODULE_LICENSE("GPL");