--- /dev/null
+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);
++
projects / openwrt / openwrt.git / blobdiff