+++ /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 / staging / chunkeey.git / blobdiff