[PATCH v2 08/10] [ARM] tegra: Add framebuffer driver
konkers at android.com
konkers at android.com
Tue Apr 13 18:42:41 EDT 2010
From: Colin Cross <ccross at android.com>
v2: Fixes from review by Russell King
- Use proper return values
v2: Fixes from review by Jaya Kumar
- Comments on lcd resolution
- Remove stub functions
- Change DUMP_REG to pr_debug
- Add unregister_framebuffer to tegra_plat_remove
v2: from Colin Cross
- adjust debugging
Signed-off-by: Colin Cross <ccross at android.com>
Signed-off-by: Erik Gilling <konkers at android.com>
---
arch/arm/mach-tegra/include/mach/tegra_fb.h | 27 ++
drivers/video/Kconfig | 10 +
drivers/video/Makefile | 1 +
drivers/video/tegrafb.c | 612 +++++++++++++++++++++++++++
4 files changed, 650 insertions(+), 0 deletions(-)
create mode 100644 arch/arm/mach-tegra/include/mach/tegra_fb.h
create mode 100644 drivers/video/tegrafb.c
diff --git a/arch/arm/mach-tegra/include/mach/tegra_fb.h b/arch/arm/mach-tegra/include/mach/tegra_fb.h
new file mode 100644
index 0000000..84ae886
--- /dev/null
+++ b/arch/arm/mach-tegra/include/mach/tegra_fb.h
@@ -0,0 +1,27 @@
+/*
+ * arch/arm/mach-tegra/include/mach/tegra_fb.h
+ *
+ * Copyright (C) 2010 Google, Inc.
+ * Author: Colin Cross <ccross at android.com>
+ *
+ * This software is licensed under the terms of the GNU General Public
+ * License version 2, as published by the Free Software Foundation, and
+ * may be copied, distributed, and modified under those terms.
+ *
+ * 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.
+ *
+ */
+
+/* Platform data structure to be passed to the driver */
+struct tegra_fb_lcd_data {
+ int fb_xres;
+ int fb_yres;
+ /* Resolution of the output to the LCD. If different from the
+ framebuffer resolution, the Tegra display block will scale it */
+ int lcd_xres;
+ int lcd_yres;
+ int bits_per_pixel;
+};
diff --git a/drivers/video/Kconfig b/drivers/video/Kconfig
index 6e16244..6751f4f 100644
--- a/drivers/video/Kconfig
+++ b/drivers/video/Kconfig
@@ -1089,6 +1089,16 @@ config FB_RIVA_BACKLIGHT
help
Say Y here if you want to control the backlight of your display.
+config FB_TEGRA
+ tristate "NVIDIA Tegra SoC display support"
+ depends on ARCH_TEGRA && FB = y
+ select FB_CFB_FILLRECT
+ select FB_CFB_COPYAREA
+ select FB_CFB_IMAGEBLIT
+ default FB
+ help
+ This driver supports the NVIDIA Tegra systems-on-a-chip.
+
config FB_I810
tristate "Intel 810/815 support (EXPERIMENTAL)"
depends on EXPERIMENTAL && FB && PCI && X86_32 && AGP_INTEL
diff --git a/drivers/video/Makefile b/drivers/video/Makefile
index ddc2af2..d9098d6 100644
--- a/drivers/video/Makefile
+++ b/drivers/video/Makefile
@@ -131,6 +131,7 @@ obj-$(CONFIG_FB_CARMINE) += carminefb.o
obj-$(CONFIG_FB_MB862XX) += mb862xx/
obj-$(CONFIG_FB_MSM) += msm/
obj-$(CONFIG_FB_NUC900) += nuc900fb.o
+obj-$(CONFIG_FB_TEGRA) += tegrafb.o
# Platform or fallback drivers go here
obj-$(CONFIG_FB_UVESA) += uvesafb.o
diff --git a/drivers/video/tegrafb.c b/drivers/video/tegrafb.c
new file mode 100644
index 0000000..8f05c56
--- /dev/null
+++ b/drivers/video/tegrafb.c
@@ -0,0 +1,612 @@
+/*
+ * drivers/video/tegrafb.c
+ *
+ * Copyright (C) 2010 Google, Inc.
+ * Author: Colin Cross <ccross at android.com>
+ * Travis Geiselbrecht <travis at palm.com>
+ *
+ * This software is licensed under the terms of the GNU General Public
+ * License version 2, as published by the Free Software Foundation, and
+ * may be copied, distributed, and modified under those terms.
+ *
+ * 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.
+ *
+ */
+
+#include <linux/fb.h>
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/errno.h>
+#include <linux/string.h>
+#include <linux/mm.h>
+#include <linux/slab.h>
+#include <linux/delay.h>
+#include <linux/platform_device.h>
+#include <linux/interrupt.h>
+#include <linux/clk.h>
+#include <linux/wait.h>
+#include <asm/cacheflush.h>
+#include <mach/tegra_fb.h>
+
+#define DC_CMD_GENERAL_INCR_SYNCPT 0x000
+#define DC_CMD_GENERAL_INCR_SYNCPT_CNTRL 0x001
+#define DC_CMD_GENERAL_INCR_SYNCPT_ERROR 0x002
+#define DC_CMD_WIN_A_INCR_SYNCPT 0x008
+#define DC_CMD_WIN_A_INCR_SYNCPT_CNTRL 0x009
+#define DC_CMD_WIN_A_INCR_SYNCPT_ERROR 0x00a
+#define DC_CMD_WIN_B_INCR_SYNCPT 0x010
+#define DC_CMD_WIN_B_INCR_SYNCPT_CNTRL 0x011
+#define DC_CMD_WIN_B_INCR_SYNCPT_ERROR 0x012
+#define DC_CMD_WIN_C_INCR_SYNCPT 0x018
+#define DC_CMD_WIN_C_INCR_SYNCPT_CNTRL 0x019
+#define DC_CMD_WIN_C_INCR_SYNCPT_ERROR 0x01a
+#define DC_CMD_CONT_SYNCPT_VSYNC 0x028
+#define DC_CMD_DISPLAY_COMMAND_OPTION0 0x031
+#define DC_CMD_DISPLAY_COMMAND 0x032
+#define DC_CMD_SIGNAL_RAISE 0x033
+#define DC_CMD_INT_STATUS 0x037
+#define DC_CMD_INT_MASK 0x038
+#define DC_CMD_INT_ENABLE 0x039
+#define DC_CMD_INT_TYPE 0x03a
+#define DC_CMD_INT_POLARITY 0x03b
+#define DC_CMD_SIGNAL_RAISE1 0x03c
+#define DC_CMD_SIGNAL_RAISE2 0x03d
+#define DC_CMD_SIGNAL_RAISE3 0x03e
+#define DC_CMD_STATE_ACCESS 0x040
+#define DC_CMD_STATE_CONTROL 0x041
+#define DC_CMD_DISPLAY_WINDOW_HEADER 0x042
+#define DC_CMD_REG_ACT_CONTROL 0x043
+#define DC_WINC_A_COLOR_PALETTE 0x500
+#define DC_WINC_A_PALETTE_COLOR_EXT 0x600
+#define DC_WIN_A_WIN_OPTIONS 0x700
+#define DC_WIN_A_BYTE_SWAP 0x701
+#define DC_WIN_A_BUFFER_CONTROL 0x702
+#define DC_WIN_A_COLOR_DEPTH 0x703
+#define DC_WIN_A_POSITION 0x704
+#define DC_WIN_A_SIZE 0x705
+#define DC_WIN_A_PRESCALED_SIZE 0x706
+#define DC_WIN_A_H_INITIAL_DDA 0x707
+#define DC_WIN_A_V_INITIAL_DDA 0x708
+#define DC_WIN_A_DDA_INCREMENT 0x709
+#define DC_WIN_A_LINE_STRIDE 0x70a
+#define DC_WIN_A_BUF_STRIDE 0x70b
+#define DC_WINBUF_A_START_ADDR 0x800
+#define DC_WINBUF_A_ADDR_H_OFFSET 0x806
+#define DC_WINBUF_A_ADDR_V_OFFSET 0x808
+
+
+#define DC_INT_CTXSW (1<<0)
+#define DC_INT_FRAME_END (1<<1)
+#define DC_INT_V_BLANK (1<<2)
+#define DC_INT_H_BLANK (1<<3)
+#define DC_INT_V_PULSE3 (1<<4)
+
+#define DC_COLOR_DEPTH_P1 0
+#define DC_COLOR_DEPTH_P2 1
+#define DC_COLOR_DEPTH_P4 2
+#define DC_COLOR_DEPTH_P8 3
+#define DC_COLOR_DEPTH_B4G4R4A4 4
+#define DC_COLOR_DEPTH_B5G5R5A 5
+#define DC_COLOR_DEPTH_B5G6R5 6
+#define DC_COLOR_DEPTH_AB5G5R5 7
+#define DC_COLOR_DEPTH_B8G8R8A8 12
+#define DC_COLOR_DEPTH_R8G8B8A8 13
+#define DC_COLOR_DEPTH_B6x2G6x2R6x2A8 14
+#define DC_COLOR_DEPTH_R6x2G6x2B6x2A8 15
+#define DC_COLOR_DEPTH_YCbCr422 16
+#define DC_COLOR_DEPTH_YUV422 17
+#define DC_COLOR_DEPTH_YCbCr420P 18
+#define DC_COLOR_DEPTH_YUV420P 19
+#define DC_COLOR_DEPTH_YCbCr422P 20
+#define DC_COLOR_DEPTH_YUV422P 21
+#define DC_COLOR_DEPTH_YCbCr422R 22
+#define DC_COLOR_DEPTH_YUV422R 23
+#define DC_COLOR_DEPTH_YCbCr422RA 24
+#define DC_COLOR_DEPTH_YUV422RA 25
+
+struct tegra_fb_info {
+ struct clk *clk;
+ struct resource *reg_mem;
+ struct resource *fb_mem;
+ void __iomem *reg_base;
+ wait_queue_head_t event_wq;
+ unsigned int wait_condition;
+ /* Resolution of the output to the LCD. If different from the
+ framebuffer resolution, the Tegra display block will scale it */
+ int lcd_xres;
+ int lcd_yres;
+ int irq;
+};
+
+static void tegra_fb_writel(struct tegra_fb_info *tegra_fb, u32 val, unsigned long reg)
+{
+ writel(val, tegra_fb->reg_base + reg*sizeof(u32));
+}
+
+static u32 tegra_fb_readl(struct tegra_fb_info *tegra_fb, unsigned long reg)
+{
+ return readl(tegra_fb->reg_base + reg*sizeof(u32));
+}
+
+/* palette attary used by the fbcon */
+u32 pseudo_palette[16];
+
+irqreturn_t tegra_fb_irq(int irq, void *ptr)
+{
+ struct fb_info *info = ptr;
+ struct tegra_fb_info *tegra_fb = info->par;
+
+ u32 reg = tegra_fb_readl(tegra_fb, DC_CMD_INT_STATUS);
+ tegra_fb_writel(tegra_fb, reg, DC_CMD_INT_STATUS);
+
+ tegra_fb->wait_condition = 1;
+ wake_up(&tegra_fb->event_wq);
+ return IRQ_HANDLED;
+}
+
+static int tegra_fb_wait_for_event(struct tegra_fb_info *tegra_fb, unsigned long timeout, u32 irq_mask)
+{
+ u32 reg;
+
+ tegra_fb->wait_condition = 0;
+
+ reg = tegra_fb_readl(tegra_fb, DC_CMD_INT_MASK);
+ reg |= irq_mask;
+ tegra_fb_writel(tegra_fb, reg, DC_CMD_INT_MASK);
+
+ /* Clear any pending interrupt */
+ tegra_fb_writel(tegra_fb, irq_mask, DC_CMD_INT_STATUS);
+
+ tegra_fb_writel(tegra_fb, irq_mask, DC_CMD_INT_ENABLE);
+
+ /* Wait for the irq to fire */
+ wait_event_interruptible_timeout(tegra_fb->event_wq, tegra_fb->wait_condition, timeout);
+
+ tegra_fb_writel(tegra_fb, 0, DC_CMD_INT_ENABLE);
+
+ if (!tegra_fb->wait_condition) {
+ pr_warning("%s: wait for vsync timed out\n", __func__);
+ return -ETIMEDOUT;
+ }
+ return 0;
+}
+
+/* Writes to many registers in the display block are buffered.
+ * tegra_fb_activate requests an update of the main registers from their
+ * double-buffered registers, which takes effect at the end of the next frame,
+ * and then waits for the frame_end IRQ.
+ */
+static void tegra_fb_activate(struct tegra_fb_info *tegra_fb)
+{
+ int vsync_count = 0;
+
+ if (unlikely(tegra_fb_readl(tegra_fb, DC_CMD_STATE_CONTROL) & 3)) {
+ pr_warning("%s: update already activated!\n", __func__);
+ return;
+ }
+
+ tegra_fb_writel(tegra_fb, (1 << 8) | (1 << 9), DC_CMD_STATE_CONTROL);
+ tegra_fb_writel(tegra_fb, (1 << 0) | (1 << 1), DC_CMD_STATE_CONTROL);
+ while (tegra_fb_readl(tegra_fb, DC_CMD_STATE_CONTROL) & 3) {
+ vsync_count++;
+ if (tegra_fb_wait_for_event(tegra_fb, HZ/10, DC_INT_FRAME_END))
+ break;
+ }
+ if (unlikely(vsync_count > 1))
+ pr_warning("%s: waited for %d vsyncs\n", __func__, vsync_count);
+}
+
+
+static int tegra_fb_open(struct fb_info *info, int user)
+{
+ return 0;
+}
+
+static int tegra_fb_release(struct fb_info *info, int user)
+{
+ return 0;
+}
+
+static int tegra_fb_check_var(struct fb_var_screeninfo *var, struct fb_info *info)
+{
+ if ((var->xres != info->var.xres) ||
+ (var->yres != info->var.yres) ||
+ (var->xres_virtual != info->var.xres_virtual) ||
+ (var->yres_virtual != info->var.yres_virtual) ||
+ (var->grayscale != info->var.grayscale))
+ return -EINVAL;
+ return 0;
+}
+
+static int tegra_fb_set_par(struct fb_info *info)
+{
+ struct tegra_fb_info *tegra_fb = info->par;
+ struct fb_var_screeninfo *var = &info->var;
+ struct fb_fix_screeninfo *fix = &info->fix;
+ u32 color_depth;
+ unsigned int h_dda;
+ unsigned int v_dda;
+
+ /* we only support RGB ordering for now */
+ switch (var->bits_per_pixel) {
+ case 32:
+ case 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;
+ color_depth = DC_COLOR_DEPTH_B8G8R8A8;
+ break;
+ case 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;
+ color_depth = DC_COLOR_DEPTH_B5G6R5;
+ break;
+ default:
+ return -EINVAL;
+ }
+ fix->line_length = var->xres * var->bits_per_pixel / 8;
+
+ h_dda = (var->xres * 0x1000) / (tegra_fb->lcd_xres - 1);
+ v_dda = (var->yres * 0x1000) / (tegra_fb->lcd_yres - 1);
+
+ tegra_fb_writel(tegra_fb, tegra_fb->lcd_yres<<16 | tegra_fb->lcd_xres,
+ DC_WIN_A_SIZE);
+ tegra_fb_writel(tegra_fb, var->yres<<16 | fix->line_length,
+ DC_WIN_A_PRESCALED_SIZE);
+ tegra_fb_writel(tegra_fb, 0, DC_WIN_A_H_INITIAL_DDA);
+ tegra_fb_writel(tegra_fb, 0, DC_WIN_A_V_INITIAL_DDA);
+ tegra_fb_writel(tegra_fb, v_dda << 16 | h_dda, DC_WIN_A_DDA_INCREMENT);
+ tegra_fb_writel(tegra_fb, color_depth, DC_WIN_A_COLOR_DEPTH);
+ tegra_fb_writel(tegra_fb, fix->line_length, DC_WIN_A_LINE_STRIDE);
+ return 0;
+}
+
+static int tegra_fb_setcolreg(unsigned regno, unsigned red, unsigned green,
+ unsigned blue, unsigned transp, struct fb_info *info)
+{
+ struct fb_var_screeninfo *var = &info->var;
+
+ if (info->fix.visual == FB_VISUAL_TRUECOLOR ||
+ info->fix.visual == FB_VISUAL_DIRECTCOLOR) {
+ u32 v;
+
+ if (regno >= 16)
+ return -EINVAL;
+
+ v = (red << var->red.offset) |
+ (green << var->green.offset) |
+ (blue << var->blue.offset);
+
+ ((u32 *)info->pseudo_palette)[regno] = v;
+ }
+
+ return 0;
+}
+
+static int tegra_fb_pan_display(struct fb_var_screeninfo *var, struct fb_info *info)
+{
+ struct tegra_fb_info *tegra_fb = info->par;
+ char __iomem *flush_start;
+ char __iomem *flush_end;
+ u32 addr;
+
+ flush_start = info->screen_base + (var->yoffset * info->fix.line_length);
+ flush_end = flush_start + (var->yres * info->fix.line_length);
+
+ info->var.xoffset = var->xoffset;
+ info->var.yoffset = var->yoffset;
+
+ addr = info->fix.smem_start + (var->yoffset * info->fix.line_length) +
+ (var->xoffset * (var->bits_per_pixel/8));
+
+ tegra_fb_writel(tegra_fb, addr, DC_WINBUF_A_START_ADDR);
+ tegra_fb_activate(tegra_fb);
+ return 0;
+}
+
+static void tegra_fb_fillrect(struct fb_info *info, const struct fb_fillrect *rect)
+{
+ cfb_fillrect(info, rect);
+}
+
+static void tegra_fb_copyarea(struct fb_info *info, const struct fb_copyarea *region)
+{
+ cfb_copyarea(info, region);
+}
+
+static void tegra_fb_imageblit(struct fb_info *info, const struct fb_image *image)
+{
+ cfb_imageblit(info, image);
+}
+
+#ifdef DEBUG
+#define DUMP_REG(a) dev_dbg(info->dev, "%-32s\t%03x\t%08x\n", #a, a, tegra_fb_readl(tegra_fb, a));
+static void dump_regs(struct fb_info *info)
+{
+ struct tegra_fb_info *tegra_fb = info->par;
+
+ DUMP_REG(DC_CMD_GENERAL_INCR_SYNCPT);
+ DUMP_REG(DC_CMD_GENERAL_INCR_SYNCPT_CNTRL);
+ DUMP_REG(DC_CMD_GENERAL_INCR_SYNCPT_ERROR);
+ DUMP_REG(DC_CMD_WIN_A_INCR_SYNCPT);
+ DUMP_REG(DC_CMD_WIN_A_INCR_SYNCPT_CNTRL);
+ DUMP_REG(DC_CMD_WIN_A_INCR_SYNCPT_ERROR);
+ DUMP_REG(DC_CMD_WIN_B_INCR_SYNCPT);
+ DUMP_REG(DC_CMD_WIN_B_INCR_SYNCPT_CNTRL);
+ DUMP_REG(DC_CMD_WIN_B_INCR_SYNCPT_ERROR);
+ DUMP_REG(DC_CMD_WIN_C_INCR_SYNCPT);
+ DUMP_REG(DC_CMD_WIN_C_INCR_SYNCPT_CNTRL);
+ DUMP_REG(DC_CMD_WIN_C_INCR_SYNCPT_ERROR);
+ DUMP_REG(DC_CMD_CONT_SYNCPT_VSYNC);
+ DUMP_REG(DC_CMD_DISPLAY_COMMAND_OPTION0);
+ DUMP_REG(DC_CMD_DISPLAY_COMMAND);
+ DUMP_REG(DC_CMD_SIGNAL_RAISE);
+ DUMP_REG(DC_CMD_INT_STATUS);
+ DUMP_REG(DC_CMD_INT_MASK);
+ DUMP_REG(DC_CMD_INT_ENABLE);
+ DUMP_REG(DC_CMD_INT_TYPE);
+ DUMP_REG(DC_CMD_INT_POLARITY);
+ DUMP_REG(DC_CMD_SIGNAL_RAISE1);
+ DUMP_REG(DC_CMD_SIGNAL_RAISE2);
+ DUMP_REG(DC_CMD_SIGNAL_RAISE3);
+ DUMP_REG(DC_CMD_STATE_ACCESS);
+ DUMP_REG(DC_CMD_STATE_CONTROL);
+ DUMP_REG(DC_CMD_DISPLAY_WINDOW_HEADER);
+ DUMP_REG(DC_CMD_REG_ACT_CONTROL);
+ tegra_fb_writel(tegra_fb, 1<<4, DC_CMD_DISPLAY_WINDOW_HEADER);
+ DUMP_REG(DC_CMD_DISPLAY_WINDOW_HEADER);
+ DUMP_REG(DC_WINC_A_COLOR_PALETTE);
+ DUMP_REG(DC_WINC_A_PALETTE_COLOR_EXT);
+ DUMP_REG(DC_WIN_A_WIN_OPTIONS);
+ DUMP_REG(DC_WIN_A_BYTE_SWAP);
+ DUMP_REG(DC_WIN_A_BUFFER_CONTROL);
+ DUMP_REG(DC_WIN_A_COLOR_DEPTH);
+ DUMP_REG(DC_WIN_A_POSITION);
+ DUMP_REG(DC_WIN_A_SIZE);
+ DUMP_REG(DC_WIN_A_PRESCALED_SIZE);
+ DUMP_REG(DC_WIN_A_H_INITIAL_DDA);
+ DUMP_REG(DC_WIN_A_V_INITIAL_DDA);
+ DUMP_REG(DC_WIN_A_DDA_INCREMENT);
+ DUMP_REG(DC_WIN_A_LINE_STRIDE);
+ DUMP_REG(DC_WIN_A_BUF_STRIDE);
+ DUMP_REG(DC_WINBUF_A_START_ADDR);
+ DUMP_REG(DC_WINBUF_A_ADDR_H_OFFSET);
+ DUMP_REG(DC_WINBUF_A_ADDR_V_OFFSET);
+}
+#endif
+
+static struct fb_ops tegra_fb_ops = {
+ .owner = THIS_MODULE,
+ .fb_open = tegra_fb_open,
+ .fb_release = tegra_fb_release,
+ .fb_check_var = tegra_fb_check_var,
+ .fb_set_par = tegra_fb_set_par,
+ .fb_setcolreg = tegra_fb_setcolreg,
+ .fb_pan_display = tegra_fb_pan_display,
+ .fb_fillrect = tegra_fb_fillrect,
+ .fb_copyarea = tegra_fb_copyarea,
+ .fb_imageblit = tegra_fb_imageblit,
+};
+
+static int tegra_plat_probe(struct platform_device *pdev)
+{
+ struct fb_info *info;
+ struct tegra_fb_info *tegra_fb;
+ struct clk *clk;
+ struct resource *res;
+ struct resource *reg_mem;
+ struct resource *fb_mem;
+ int ret = 0;
+ void __iomem *reg_base;
+ void __iomem *fb_base;
+ unsigned long fb_size;
+ unsigned long fb_phys;
+ int irq;
+ const struct tegra_fb_lcd_data *lcd_data = pdev->dev.platform_data;
+
+ info = framebuffer_alloc(sizeof(struct tegra_fb_info), &pdev->dev);
+ if (!info) {
+ ret = -ENOMEM;
+ goto err;
+ }
+
+ irq = platform_get_irq(pdev, 0);
+ if (irq <= 0) {
+ pr_debug("%s: no irq\n", pdev->name);
+ ret = -ENOENT;
+ goto err_free;
+ }
+
+ res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ if (!res) {
+ pr_debug("%s: no mem resource\n", pdev->name);
+ ret = -ENOENT;
+ goto err_free;
+ }
+
+ reg_mem = request_mem_region(res->start, resource_size(res), pdev->name);
+ if (!reg_mem) {
+ pr_debug("%s: request_mem_region failed\n", pdev->name);
+ ret = -EBUSY;
+ goto err_free;
+ }
+
+ reg_base = ioremap(res->start, resource_size(res));
+ if (!reg_base) {
+ pr_debug("%s: registers can't be mapped\n", pdev->name);
+ ret = -EBUSY;
+ goto err_release_resource_reg;
+ }
+
+ res = platform_get_resource(pdev, IORESOURCE_MEM, 1);
+ if (!res) {
+ pr_debug("%s: no mem resource\n", pdev->name);
+ ret = -ENOENT;
+ goto err_iounmap_reg;
+ }
+
+ fb_mem = request_mem_region(res->start, resource_size(res), pdev->name);
+ if (!fb_mem) {
+ pr_debug("%s: request_mem_region failed\n", pdev->name);
+ ret = -EBUSY;
+ goto err_iounmap_reg;
+ }
+
+ fb_size = resource_size(res);
+ fb_phys = res->start;
+ fb_base = ioremap_nocache(fb_phys, fb_size);
+ if (!fb_base) {
+ pr_debug("%s: fb can't be mapped\n", pdev->name);
+ ret = -EBUSY;
+ goto err_release_resource_fb;
+ }
+
+ clk = clk_get(&pdev->dev, NULL);
+ if (!clk) {
+ pr_debug("%s: can't get clock\n", pdev->name);
+ ret = -ENOENT;
+ goto err_iounmap_fb;
+ }
+ clk_enable(clk);
+
+ tegra_fb = info->par;
+ tegra_fb->clk = clk;
+ tegra_fb->fb_mem = fb_mem;
+ tegra_fb->reg_mem = reg_mem;
+ tegra_fb->reg_base = reg_base;
+ tegra_fb->irq = irq;
+ tegra_fb->lcd_xres = lcd_data->lcd_xres;
+ tegra_fb->lcd_yres = lcd_data->lcd_yres;
+
+ info->fbops = &tegra_fb_ops;
+ info->pseudo_palette = pseudo_palette;
+ info->screen_base = fb_base;
+ info->screen_size = fb_size;
+
+ strlcpy(info->fix.id, "tegra_fb", sizeof(info->fix.id));
+ info->fix.type = FB_TYPE_PACKED_PIXELS;
+ info->fix.visual = FB_VISUAL_TRUECOLOR;
+ info->fix.xpanstep = 1;
+ info->fix.ypanstep = 1;
+ info->fix.accel = FB_ACCEL_NONE;
+ info->fix.smem_start = fb_phys;
+ info->fix.smem_len = fb_size;
+
+ info->var.xres = lcd_data->fb_xres;
+ info->var.yres = lcd_data->fb_yres;
+ info->var.xres_virtual = lcd_data->fb_xres;
+ info->var.yres_virtual = lcd_data->fb_yres*2;
+ info->var.bits_per_pixel = lcd_data->bits_per_pixel;
+ info->var.activate = FB_ACTIVATE_NOW;
+ info->var.height = -1;
+ info->var.width = -1;
+ info->var.pixclock = 24500;
+ info->var.left_margin = 0;
+ info->var.right_margin = 0;
+ info->var.upper_margin = 0;
+ info->var.lower_margin = 0;
+ info->var.hsync_len = 0;
+ info->var.vsync_len = 0;
+ info->var.vmode = FB_VMODE_NONINTERLACED;
+
+ if (request_irq(irq, tegra_fb_irq, IRQF_DISABLED,
+ dev_name(&pdev->dev), info)) {
+ pr_debug("%s: request_irq %d failed\n",
+ pdev->name, irq);
+ ret = -EBUSY;
+ goto err_clk_disable;
+ }
+
+ init_waitqueue_head(&tegra_fb->event_wq);
+
+ /* Enable writes to Window A */
+ tegra_fb_writel(tegra_fb, 1<<4, DC_CMD_DISPLAY_WINDOW_HEADER);
+
+#ifdef DEBUG
+ info->dev = &pdev->dev;
+ dev_dbg(info->dev, "Framebuffer registers before init:\n");
+ dump_regs(info);
+#endif
+
+ tegra_fb_set_par(info);
+
+#ifdef DEBUG
+ dev_dbg(info->dev, "Framebuffer registers after init:\n");
+ dump_regs(info);
+#endif
+
+ dev_info(&pdev->dev, "base address: %08x (%08x)\n",
+ (unsigned int)info->fix.smem_start,
+ (unsigned int)info->screen_base);
+
+ register_framebuffer(info);
+ platform_set_drvdata(pdev, info);
+ return 0;
+
+err_clk_disable:
+ clk_disable(clk);
+err_iounmap_fb:
+ iounmap(fb_base);
+err_release_resource_fb:
+ release_resource(fb_mem);
+err_iounmap_reg:
+ iounmap(reg_base);
+err_release_resource_reg:
+ release_resource(reg_mem);
+err_free:
+ framebuffer_release(info);
+err:
+ return ret;
+}
+
+static int tegra_plat_remove(struct platform_device *pdev)
+{
+ struct fb_info *info = platform_get_drvdata(pdev);
+ struct tegra_fb_info *tegra_fb = info->par;
+ unregister_framebuffer(info);
+ clk_disable(tegra_fb->clk);
+ iounmap(info->screen_base);
+ release_resource(tegra_fb->fb_mem);
+ iounmap(tegra_fb->reg_base);
+ release_resource(tegra_fb->reg_mem);
+ framebuffer_release(info);
+ return 0;
+}
+
+struct platform_driver tegra_platform_driver = {
+ .probe = tegra_plat_probe,
+ .remove = tegra_plat_remove,
+ .driver = {
+ .name = "tegrafb",
+ .owner = THIS_MODULE,
+ },
+};
+
+static int __init tegra_fb_init(void)
+{
+ int e;
+ e = platform_driver_register(&tegra_platform_driver);
+ if (e) {
+ pr_info("tegrafb: platform_driver_register failed\n");
+ return e;
+ }
+ return e;
+}
+
+static void __exit tegra_exit(void)
+{
+ platform_driver_unregister(&tegra_platform_driver);
+}
+
+module_exit(tegra_exit);
+module_init(tegra_fb_init);
--
1.6.5.6
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