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openwrt-xburst/target/linux/goldfish/patches-2.6.30/0128--ARM-goldfish-fb-Add-fb-driver-for-goldfish.patch

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From f8101c780fdc050eda9f93c94f8841de9f384b4f Mon Sep 17 00:00:00 2001
From: =?utf-8?q?Arve=20Hj=C3=B8nnev=C3=A5g?= <arve@google.com>
Date: Fri, 29 Jun 2007 22:14:27 -0700
Subject: [PATCH 128/134] [ARM] goldfish: fb: Add fb driver for goldfish.
MIME-Version: 1.0
Content-Type: text/plain; charset=utf-8
Content-Transfer-Encoding: 8bit
Supports panning for double buffering.
Signed-off-by: Mike A. Chan <mikechan@google.com>
Signed-off-by: Arve Hjønnevåg <arve@android.com>
---
drivers/video/Kconfig | 9 ++
drivers/video/Makefile | 1 +
drivers/video/goldfishfb.c | 334 ++++++++++++++++++++++++++++++++++++++++++++
3 files changed, 344 insertions(+), 0 deletions(-)
create mode 100644 drivers/video/goldfishfb.c
--- a/drivers/video/Kconfig
+++ b/drivers/video/Kconfig
@@ -2005,6 +2005,15 @@ config FB_XILINX
framebuffer. ML300 carries a 640*480 LCD display on the board,
ML403 uses a standard DB15 VGA connector.
+config FB_GOLDFISH
+ tristate "Goldfish Framebuffer"
+ depends on FB
+ select FB_CFB_FILLRECT
+ select FB_CFB_COPYAREA
+ select FB_CFB_IMAGEBLIT
+ ---help---
+ Framebuffer driver for Goldfish Virtual Platform
+
config FB_COBALT
tristate "Cobalt server LCD frame buffer support"
depends on FB && MIPS_COBALT
--- a/drivers/video/Makefile
+++ b/drivers/video/Makefile
@@ -92,6 +92,7 @@ obj-$(CONFIG_FB_ATMEL) += atmel_lcdfb
obj-$(CONFIG_FB_PVR2) += pvr2fb.o
obj-$(CONFIG_FB_VOODOO1) += sstfb.o
obj-$(CONFIG_FB_ARMCLCD) += amba-clcd.o
+obj-$(CONFIG_FB_GOLDFISH) += goldfishfb.o
obj-$(CONFIG_FB_68328) += 68328fb.o
obj-$(CONFIG_FB_GBE) += gbefb.o
obj-$(CONFIG_FB_CIRRUS) += cirrusfb.o
--- /dev/null
+++ b/drivers/video/goldfishfb.c
@@ -0,0 +1,334 @@
+/* drivers/video/goldfishfb.c
+**
+** Copyright (C) 2007 Google, Inc.
+**
+** 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/module.h>
+#include <linux/kernel.h>
+#include <linux/dma-mapping.h>
+#include <linux/errno.h>
+#include <linux/string.h>
+#include <linux/slab.h>
+#include <linux/delay.h>
+#include <linux/mm.h>
+#include <linux/fb.h>
+#include <linux/init.h>
+#include <linux/interrupt.h>
+#include <linux/ioport.h>
+#include <linux/platform_device.h>
+#ifdef CONFIG_ANDROID_POWER
+#include <linux/android_power.h>
+#endif
+
+#include <mach/hardware.h>
+
+enum {
+ FB_GET_WIDTH = 0x00,
+ FB_GET_HEIGHT = 0x04,
+ FB_INT_STATUS = 0x08,
+ FB_INT_ENABLE = 0x0c,
+ FB_SET_BASE = 0x10,
+ FB_SET_ROTATION = 0x14,
+ FB_SET_BLANK = 0x18,
+ FB_GET_PHYS_WIDTH = 0x1c,
+ FB_GET_PHYS_HEIGHT = 0x20,
+
+ FB_INT_VSYNC = 1U << 0,
+ FB_INT_BASE_UPDATE_DONE = 1U << 1
+};
+
+struct goldfish_fb {
+ uint32_t reg_base;
+ int irq;
+ spinlock_t lock;
+ wait_queue_head_t wait;
+ int base_update_count;
+ int rotation;
+ struct fb_info fb;
+ u32 cmap[16];
+#ifdef CONFIG_ANDROID_POWER
+ android_early_suspend_t early_suspend;
+#endif
+};
+
+static irqreturn_t
+goldfish_fb_interrupt(int irq, void *dev_id)
+{
+ unsigned long irq_flags;
+ struct goldfish_fb *fb = dev_id;
+ uint32_t status;
+
+ spin_lock_irqsave(&fb->lock, irq_flags);
+ status = readl(fb->reg_base + FB_INT_STATUS);
+ if(status & FB_INT_BASE_UPDATE_DONE) {
+ fb->base_update_count++;
+ wake_up(&fb->wait);
+ }
+ spin_unlock_irqrestore(&fb->lock, irq_flags);
+ return status ? IRQ_HANDLED : IRQ_NONE;
+}
+
+static inline u32 convert_bitfield(int val, struct fb_bitfield *bf)
+{
+ unsigned int mask = (1 << bf->length) - 1;
+
+ return (val >> (16 - bf->length) & mask) << bf->offset;
+}
+
+static int
+goldfish_fb_setcolreg(unsigned int regno, unsigned int red, unsigned int green,
+ unsigned int blue, unsigned int transp, struct fb_info *info)
+{
+ struct goldfish_fb *fb = container_of(info, struct goldfish_fb, fb);
+
+ if (regno < 16) {
+ fb->cmap[regno] = convert_bitfield(transp, &fb->fb.var.transp) |
+ convert_bitfield(blue, &fb->fb.var.blue) |
+ convert_bitfield(green, &fb->fb.var.green) |
+ convert_bitfield(red, &fb->fb.var.red);
+ return 0;
+ }
+ else {
+ return 1;
+ }
+}
+
+static int goldfish_fb_check_var(struct fb_var_screeninfo *var, struct fb_info *info)
+{
+ if((var->rotate & 1) != (info->var.rotate & 1)) {
+ if((var->xres != info->var.yres) ||
+ (var->yres != info->var.xres) ||
+ (var->xres_virtual != info->var.yres) ||
+ (var->yres_virtual > info->var.xres * 2) ||
+ (var->yres_virtual < info->var.xres )) {
+ return -EINVAL;
+ }
+ }
+ else {
+ if((var->xres != info->var.xres) ||
+ (var->yres != info->var.yres) ||
+ (var->xres_virtual != info->var.xres) ||
+ (var->yres_virtual > info->var.yres * 2) ||
+ (var->yres_virtual < info->var.yres )) {
+ return -EINVAL;
+ }
+ }
+ if((var->xoffset != info->var.xoffset) ||
+ (var->bits_per_pixel != info->var.bits_per_pixel) ||
+ (var->grayscale != info->var.grayscale)) {
+ return -EINVAL;
+ }
+ return 0;
+}
+
+static int goldfish_fb_set_par(struct fb_info *info)
+{
+ struct goldfish_fb *fb = container_of(info, struct goldfish_fb, fb);
+ if(fb->rotation != fb->fb.var.rotate) {
+ info->fix.line_length = info->var.xres * 2;
+ fb->rotation = fb->fb.var.rotate;
+ writel(fb->rotation, fb->reg_base + FB_SET_ROTATION);
+ }
+ return 0;
+}
+
+
+static int goldfish_fb_pan_display(struct fb_var_screeninfo *var, struct fb_info *info)
+{
+ unsigned long irq_flags;
+ int base_update_count;
+ struct goldfish_fb *fb = container_of(info, struct goldfish_fb, fb);
+
+ spin_lock_irqsave(&fb->lock, irq_flags);
+ base_update_count = fb->base_update_count;
+ writel(fb->fb.fix.smem_start + fb->fb.var.xres * 2 * var->yoffset, fb->reg_base + FB_SET_BASE);
+ spin_unlock_irqrestore(&fb->lock, irq_flags);
+ wait_event_timeout(fb->wait, fb->base_update_count != base_update_count, HZ / 15);
+ if(fb->base_update_count == base_update_count)
+ printk("goldfish_fb_pan_display: timeout wating for base update\n");
+ return 0;
+}
+
+#ifdef CONFIG_ANDROID_POWER
+static void goldfish_fb_early_suspend(android_early_suspend_t *h)
+{
+ struct goldfish_fb *fb = container_of(h, struct goldfish_fb, early_suspend);
+ writel(1, fb->reg_base + FB_SET_BLANK);
+}
+
+static void goldfish_fb_late_resume(android_early_suspend_t *h)
+{
+ struct goldfish_fb *fb = container_of(h, struct goldfish_fb, early_suspend);
+ writel(0, fb->reg_base + FB_SET_BLANK);
+}
+#endif
+
+static struct fb_ops goldfish_fb_ops = {
+ .owner = THIS_MODULE,
+ .fb_check_var = goldfish_fb_check_var,
+ .fb_set_par = goldfish_fb_set_par,
+ .fb_setcolreg = goldfish_fb_setcolreg,
+ .fb_pan_display = goldfish_fb_pan_display,
+ .fb_fillrect = cfb_fillrect,
+ .fb_copyarea = cfb_copyarea,
+ .fb_imageblit = cfb_imageblit,
+};
+
+
+static int goldfish_fb_probe(struct platform_device *pdev)
+{
+ int ret;
+ struct resource *r;
+ struct goldfish_fb *fb;
+ size_t framesize;
+ uint32_t width, height;
+ dma_addr_t fbpaddr;
+
+ fb = kzalloc(sizeof(*fb), GFP_KERNEL);
+ if(fb == NULL) {
+ ret = -ENOMEM;
+ goto err_fb_alloc_failed;
+ }
+ spin_lock_init(&fb->lock);
+ init_waitqueue_head(&fb->wait);
+ platform_set_drvdata(pdev, fb);
+
+ r = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ if(r == NULL) {
+ ret = -ENODEV;
+ goto err_no_io_base;
+ }
+ fb->reg_base = IO_ADDRESS(r->start - IO_START);
+
+ fb->irq = platform_get_irq(pdev, 0);
+ if(fb->irq < 0) {
+ ret = -ENODEV;
+ goto err_no_irq;
+ }
+
+ width = readl(fb->reg_base + FB_GET_WIDTH);
+ height = readl(fb->reg_base + FB_GET_HEIGHT);
+
+ fb->fb.fbops = &goldfish_fb_ops;
+ fb->fb.flags = FBINFO_FLAG_DEFAULT;
+ fb->fb.pseudo_palette = fb->cmap;
+ //strncpy(fb->fb.fix.id, clcd_name, sizeof(fb->fb.fix.id));
+ fb->fb.fix.type = FB_TYPE_PACKED_PIXELS;
+ fb->fb.fix.visual = FB_VISUAL_TRUECOLOR;
+ fb->fb.fix.line_length = width * 2;
+ fb->fb.fix.accel = FB_ACCEL_NONE;
+ fb->fb.fix.ypanstep = 1;
+
+ fb->fb.var.xres = width;
+ fb->fb.var.yres = height;
+ fb->fb.var.xres_virtual = width;
+ fb->fb.var.yres_virtual = height * 2;
+ fb->fb.var.bits_per_pixel = 16;
+ fb->fb.var.activate = FB_ACTIVATE_NOW;
+ fb->fb.var.height = readl(fb->reg_base + FB_GET_PHYS_HEIGHT);
+ fb->fb.var.width = readl(fb->reg_base + FB_GET_PHYS_WIDTH);
+
+ fb->fb.var.red.offset = 11;
+ fb->fb.var.red.length = 5;
+ fb->fb.var.green.offset = 5;
+ fb->fb.var.green.length = 6;
+ fb->fb.var.blue.offset = 0;
+ fb->fb.var.blue.length = 5;
+
+ framesize = width * height * 2 * 2;
+ fb->fb.screen_base = dma_alloc_writecombine(&pdev->dev, framesize,
+ &fbpaddr, GFP_KERNEL);
+ printk("allocating frame buffer %d * %d, got %p\n", width, height, fb->fb.screen_base);
+ if(fb->fb.screen_base == 0) {
+ ret = -ENOMEM;
+ goto err_alloc_screen_base_failed;
+ }
+ fb->fb.fix.smem_start = fbpaddr;
+ fb->fb.fix.smem_len = framesize;
+
+ ret = fb_set_var(&fb->fb, &fb->fb.var);
+ if(ret)
+ goto err_fb_set_var_failed;
+
+ ret = request_irq(fb->irq, goldfish_fb_interrupt, IRQF_SHARED, pdev->name, fb);
+ if(ret)
+ goto err_request_irq_failed;
+
+ writel(FB_INT_BASE_UPDATE_DONE, fb->reg_base + FB_INT_ENABLE);
+ goldfish_fb_pan_display(&fb->fb.var, &fb->fb); // updates base
+
+ ret = register_framebuffer(&fb->fb);
+ if(ret)
+ goto err_register_framebuffer_failed;
+
+#ifdef CONFIG_ANDROID_POWER
+ fb->early_suspend.suspend = goldfish_fb_early_suspend;
+ fb->early_suspend.resume = goldfish_fb_late_resume;
+ android_register_early_suspend(&fb->early_suspend);
+#endif
+
+ return 0;
+
+
+err_register_framebuffer_failed:
+ free_irq(fb->irq, fb);
+err_request_irq_failed:
+err_fb_set_var_failed:
+ dma_free_writecombine(&pdev->dev, framesize, fb->fb.screen_base, fb->fb.fix.smem_start);
+err_alloc_screen_base_failed:
+err_no_irq:
+err_no_io_base:
+ kfree(fb);
+err_fb_alloc_failed:
+ return ret;
+}
+
+static int goldfish_fb_remove(struct platform_device *pdev)
+{
+ size_t framesize;
+ struct goldfish_fb *fb = platform_get_drvdata(pdev);
+
+ framesize = fb->fb.var.xres_virtual * fb->fb.var.yres_virtual * 2;
+
+#ifdef CONFIG_ANDROID_POWER
+ android_unregister_early_suspend(&fb->early_suspend);
+#endif
+ unregister_framebuffer(&fb->fb);
+ free_irq(fb->irq, fb);
+ dma_free_writecombine(&pdev->dev, framesize, fb->fb.screen_base, fb->fb.fix.smem_start);
+ kfree(fb);
+ return 0;
+}
+
+
+static struct platform_driver goldfish_fb_driver = {
+ .probe = goldfish_fb_probe,
+ .remove = goldfish_fb_remove,
+ .driver = {
+ .name = "goldfish_fb"
+ }
+};
+
+static int __init goldfish_fb_init(void)
+{
+ return platform_driver_register(&goldfish_fb_driver);
+}
+
+static void __exit goldfish_fb_exit(void)
+{
+ platform_driver_unregister(&goldfish_fb_driver);
+}
+
+module_init(goldfish_fb_init);
+module_exit(goldfish_fb_exit);
+