mirror of
git://projects.qi-hardware.com/openwrt-xburst.git
synced 2024-12-25 18:14:35 +02:00
2d581e6047
git-svn-id: svn://svn.openwrt.org/openwrt/trunk@16459 3c298f89-4303-0410-b956-a3cf2f4a3e73
385 lines
11 KiB
Diff
385 lines
11 KiB
Diff
From f8101c780fdc050eda9f93c94f8841de9f384b4f Mon Sep 17 00:00:00 2001
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From: =?utf-8?q?Arve=20Hj=C3=B8nnev=C3=A5g?= <arve@google.com>
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Date: Fri, 29 Jun 2007 22:14:27 -0700
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Subject: [PATCH 128/134] [ARM] goldfish: fb: Add fb driver for goldfish.
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MIME-Version: 1.0
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Content-Type: text/plain; charset=utf-8
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Content-Transfer-Encoding: 8bit
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Supports panning for double buffering.
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Signed-off-by: Mike A. Chan <mikechan@google.com>
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Signed-off-by: Arve Hjønnevåg <arve@android.com>
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---
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drivers/video/Kconfig | 9 ++
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drivers/video/Makefile | 1 +
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drivers/video/goldfishfb.c | 334 ++++++++++++++++++++++++++++++++++++++++++++
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3 files changed, 344 insertions(+), 0 deletions(-)
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create mode 100644 drivers/video/goldfishfb.c
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--- a/drivers/video/Kconfig
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+++ b/drivers/video/Kconfig
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@@ -2005,6 +2005,15 @@ config FB_XILINX
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framebuffer. ML300 carries a 640*480 LCD display on the board,
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ML403 uses a standard DB15 VGA connector.
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+config FB_GOLDFISH
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+ tristate "Goldfish Framebuffer"
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+ depends on FB
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+ select FB_CFB_FILLRECT
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+ select FB_CFB_COPYAREA
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+ select FB_CFB_IMAGEBLIT
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+ ---help---
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+ Framebuffer driver for Goldfish Virtual Platform
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+
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config FB_COBALT
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tristate "Cobalt server LCD frame buffer support"
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depends on FB && MIPS_COBALT
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--- a/drivers/video/Makefile
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+++ b/drivers/video/Makefile
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@@ -92,6 +92,7 @@ obj-$(CONFIG_FB_ATMEL) += atmel_lcdfb
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obj-$(CONFIG_FB_PVR2) += pvr2fb.o
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obj-$(CONFIG_FB_VOODOO1) += sstfb.o
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obj-$(CONFIG_FB_ARMCLCD) += amba-clcd.o
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+obj-$(CONFIG_FB_GOLDFISH) += goldfishfb.o
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obj-$(CONFIG_FB_68328) += 68328fb.o
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obj-$(CONFIG_FB_GBE) += gbefb.o
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obj-$(CONFIG_FB_CIRRUS) += cirrusfb.o
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--- /dev/null
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+++ b/drivers/video/goldfishfb.c
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@@ -0,0 +1,334 @@
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+/* drivers/video/goldfishfb.c
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+**
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+** Copyright (C) 2007 Google, Inc.
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+**
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+** This software is licensed under the terms of the GNU General Public
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+** License version 2, as published by the Free Software Foundation, and
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+** may be copied, distributed, and modified under those terms.
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+**
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+** This program is distributed in the hope that it will be useful,
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+** but WITHOUT ANY WARRANTY; without even the implied warranty of
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+** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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+** GNU General Public License for more details.
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+**
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+*/
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+
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+#include <linux/module.h>
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+#include <linux/kernel.h>
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+#include <linux/dma-mapping.h>
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+#include <linux/errno.h>
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+#include <linux/string.h>
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+#include <linux/slab.h>
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+#include <linux/delay.h>
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+#include <linux/mm.h>
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+#include <linux/fb.h>
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+#include <linux/init.h>
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+#include <linux/interrupt.h>
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+#include <linux/ioport.h>
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+#include <linux/platform_device.h>
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+#ifdef CONFIG_ANDROID_POWER
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+#include <linux/android_power.h>
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+#endif
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+
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+#include <mach/hardware.h>
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+
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+enum {
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+ FB_GET_WIDTH = 0x00,
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+ FB_GET_HEIGHT = 0x04,
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+ FB_INT_STATUS = 0x08,
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+ FB_INT_ENABLE = 0x0c,
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+ FB_SET_BASE = 0x10,
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+ FB_SET_ROTATION = 0x14,
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+ FB_SET_BLANK = 0x18,
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+ FB_GET_PHYS_WIDTH = 0x1c,
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+ FB_GET_PHYS_HEIGHT = 0x20,
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+
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+ FB_INT_VSYNC = 1U << 0,
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+ FB_INT_BASE_UPDATE_DONE = 1U << 1
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+};
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+
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+struct goldfish_fb {
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+ uint32_t reg_base;
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+ int irq;
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+ spinlock_t lock;
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+ wait_queue_head_t wait;
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+ int base_update_count;
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+ int rotation;
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+ struct fb_info fb;
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+ u32 cmap[16];
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+#ifdef CONFIG_ANDROID_POWER
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+ android_early_suspend_t early_suspend;
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+#endif
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+};
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+
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+static irqreturn_t
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+goldfish_fb_interrupt(int irq, void *dev_id)
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+{
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+ unsigned long irq_flags;
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+ struct goldfish_fb *fb = dev_id;
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+ uint32_t status;
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+
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+ spin_lock_irqsave(&fb->lock, irq_flags);
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+ status = readl(fb->reg_base + FB_INT_STATUS);
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+ if(status & FB_INT_BASE_UPDATE_DONE) {
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+ fb->base_update_count++;
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+ wake_up(&fb->wait);
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+ }
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+ spin_unlock_irqrestore(&fb->lock, irq_flags);
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+ return status ? IRQ_HANDLED : IRQ_NONE;
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+}
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+
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+static inline u32 convert_bitfield(int val, struct fb_bitfield *bf)
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+{
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+ unsigned int mask = (1 << bf->length) - 1;
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+
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+ return (val >> (16 - bf->length) & mask) << bf->offset;
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+}
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+
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+static int
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+goldfish_fb_setcolreg(unsigned int regno, unsigned int red, unsigned int green,
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+ unsigned int blue, unsigned int transp, struct fb_info *info)
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+{
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+ struct goldfish_fb *fb = container_of(info, struct goldfish_fb, fb);
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+
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+ if (regno < 16) {
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+ fb->cmap[regno] = convert_bitfield(transp, &fb->fb.var.transp) |
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+ convert_bitfield(blue, &fb->fb.var.blue) |
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+ convert_bitfield(green, &fb->fb.var.green) |
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+ convert_bitfield(red, &fb->fb.var.red);
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+ return 0;
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+ }
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+ else {
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+ return 1;
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+ }
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+}
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+
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+static int goldfish_fb_check_var(struct fb_var_screeninfo *var, struct fb_info *info)
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+{
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+ if((var->rotate & 1) != (info->var.rotate & 1)) {
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+ if((var->xres != info->var.yres) ||
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+ (var->yres != info->var.xres) ||
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+ (var->xres_virtual != info->var.yres) ||
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+ (var->yres_virtual > info->var.xres * 2) ||
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+ (var->yres_virtual < info->var.xres )) {
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+ return -EINVAL;
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+ }
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+ }
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+ else {
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+ if((var->xres != info->var.xres) ||
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+ (var->yres != info->var.yres) ||
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+ (var->xres_virtual != info->var.xres) ||
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+ (var->yres_virtual > info->var.yres * 2) ||
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+ (var->yres_virtual < info->var.yres )) {
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+ return -EINVAL;
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+ }
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+ }
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+ if((var->xoffset != info->var.xoffset) ||
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+ (var->bits_per_pixel != info->var.bits_per_pixel) ||
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+ (var->grayscale != info->var.grayscale)) {
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+ return -EINVAL;
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+ }
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+ return 0;
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+}
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+
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+static int goldfish_fb_set_par(struct fb_info *info)
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+{
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+ struct goldfish_fb *fb = container_of(info, struct goldfish_fb, fb);
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+ if(fb->rotation != fb->fb.var.rotate) {
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+ info->fix.line_length = info->var.xres * 2;
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+ fb->rotation = fb->fb.var.rotate;
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+ writel(fb->rotation, fb->reg_base + FB_SET_ROTATION);
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+ }
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+ return 0;
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+}
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+
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+
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+static int goldfish_fb_pan_display(struct fb_var_screeninfo *var, struct fb_info *info)
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+{
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+ unsigned long irq_flags;
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+ int base_update_count;
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+ struct goldfish_fb *fb = container_of(info, struct goldfish_fb, fb);
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+
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+ spin_lock_irqsave(&fb->lock, irq_flags);
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+ base_update_count = fb->base_update_count;
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+ writel(fb->fb.fix.smem_start + fb->fb.var.xres * 2 * var->yoffset, fb->reg_base + FB_SET_BASE);
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+ spin_unlock_irqrestore(&fb->lock, irq_flags);
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+ wait_event_timeout(fb->wait, fb->base_update_count != base_update_count, HZ / 15);
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+ if(fb->base_update_count == base_update_count)
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+ printk("goldfish_fb_pan_display: timeout wating for base update\n");
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+ return 0;
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+}
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+
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+#ifdef CONFIG_ANDROID_POWER
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+static void goldfish_fb_early_suspend(android_early_suspend_t *h)
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+{
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+ struct goldfish_fb *fb = container_of(h, struct goldfish_fb, early_suspend);
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+ writel(1, fb->reg_base + FB_SET_BLANK);
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+}
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+
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+static void goldfish_fb_late_resume(android_early_suspend_t *h)
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+{
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+ struct goldfish_fb *fb = container_of(h, struct goldfish_fb, early_suspend);
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+ writel(0, fb->reg_base + FB_SET_BLANK);
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+}
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+#endif
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+
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+static struct fb_ops goldfish_fb_ops = {
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+ .owner = THIS_MODULE,
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+ .fb_check_var = goldfish_fb_check_var,
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+ .fb_set_par = goldfish_fb_set_par,
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+ .fb_setcolreg = goldfish_fb_setcolreg,
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+ .fb_pan_display = goldfish_fb_pan_display,
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+ .fb_fillrect = cfb_fillrect,
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+ .fb_copyarea = cfb_copyarea,
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+ .fb_imageblit = cfb_imageblit,
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+};
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+
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+
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+static int goldfish_fb_probe(struct platform_device *pdev)
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+{
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+ int ret;
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+ struct resource *r;
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+ struct goldfish_fb *fb;
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+ size_t framesize;
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+ uint32_t width, height;
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+ dma_addr_t fbpaddr;
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+
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+ fb = kzalloc(sizeof(*fb), GFP_KERNEL);
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+ if(fb == NULL) {
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+ ret = -ENOMEM;
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+ goto err_fb_alloc_failed;
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+ }
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+ spin_lock_init(&fb->lock);
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+ init_waitqueue_head(&fb->wait);
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+ platform_set_drvdata(pdev, fb);
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+
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+ r = platform_get_resource(pdev, IORESOURCE_MEM, 0);
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+ if(r == NULL) {
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+ ret = -ENODEV;
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+ goto err_no_io_base;
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+ }
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+ fb->reg_base = IO_ADDRESS(r->start - IO_START);
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+
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+ fb->irq = platform_get_irq(pdev, 0);
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+ if(fb->irq < 0) {
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+ ret = -ENODEV;
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+ goto err_no_irq;
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+ }
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+
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+ width = readl(fb->reg_base + FB_GET_WIDTH);
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+ height = readl(fb->reg_base + FB_GET_HEIGHT);
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+
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+ fb->fb.fbops = &goldfish_fb_ops;
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+ fb->fb.flags = FBINFO_FLAG_DEFAULT;
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+ fb->fb.pseudo_palette = fb->cmap;
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+ //strncpy(fb->fb.fix.id, clcd_name, sizeof(fb->fb.fix.id));
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+ fb->fb.fix.type = FB_TYPE_PACKED_PIXELS;
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+ fb->fb.fix.visual = FB_VISUAL_TRUECOLOR;
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+ fb->fb.fix.line_length = width * 2;
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+ fb->fb.fix.accel = FB_ACCEL_NONE;
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+ fb->fb.fix.ypanstep = 1;
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+
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+ fb->fb.var.xres = width;
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+ fb->fb.var.yres = height;
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+ fb->fb.var.xres_virtual = width;
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+ fb->fb.var.yres_virtual = height * 2;
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+ fb->fb.var.bits_per_pixel = 16;
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+ fb->fb.var.activate = FB_ACTIVATE_NOW;
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+ fb->fb.var.height = readl(fb->reg_base + FB_GET_PHYS_HEIGHT);
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+ fb->fb.var.width = readl(fb->reg_base + FB_GET_PHYS_WIDTH);
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+
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+ fb->fb.var.red.offset = 11;
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+ fb->fb.var.red.length = 5;
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+ fb->fb.var.green.offset = 5;
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+ fb->fb.var.green.length = 6;
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+ fb->fb.var.blue.offset = 0;
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+ fb->fb.var.blue.length = 5;
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+
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+ framesize = width * height * 2 * 2;
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+ fb->fb.screen_base = dma_alloc_writecombine(&pdev->dev, framesize,
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+ &fbpaddr, GFP_KERNEL);
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+ printk("allocating frame buffer %d * %d, got %p\n", width, height, fb->fb.screen_base);
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+ if(fb->fb.screen_base == 0) {
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+ ret = -ENOMEM;
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+ goto err_alloc_screen_base_failed;
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+ }
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+ fb->fb.fix.smem_start = fbpaddr;
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+ fb->fb.fix.smem_len = framesize;
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+
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+ ret = fb_set_var(&fb->fb, &fb->fb.var);
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+ if(ret)
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+ goto err_fb_set_var_failed;
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+
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+ ret = request_irq(fb->irq, goldfish_fb_interrupt, IRQF_SHARED, pdev->name, fb);
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+ if(ret)
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+ goto err_request_irq_failed;
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+
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+ writel(FB_INT_BASE_UPDATE_DONE, fb->reg_base + FB_INT_ENABLE);
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+ goldfish_fb_pan_display(&fb->fb.var, &fb->fb); // updates base
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+
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+ ret = register_framebuffer(&fb->fb);
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+ if(ret)
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+ goto err_register_framebuffer_failed;
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+
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+#ifdef CONFIG_ANDROID_POWER
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+ fb->early_suspend.suspend = goldfish_fb_early_suspend;
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+ fb->early_suspend.resume = goldfish_fb_late_resume;
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+ android_register_early_suspend(&fb->early_suspend);
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+#endif
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+
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+ return 0;
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+
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+
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+err_register_framebuffer_failed:
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+ free_irq(fb->irq, fb);
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+err_request_irq_failed:
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+err_fb_set_var_failed:
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+ dma_free_writecombine(&pdev->dev, framesize, fb->fb.screen_base, fb->fb.fix.smem_start);
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+err_alloc_screen_base_failed:
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+err_no_irq:
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+err_no_io_base:
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+ kfree(fb);
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+err_fb_alloc_failed:
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+ return ret;
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+}
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+
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+static int goldfish_fb_remove(struct platform_device *pdev)
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+{
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+ size_t framesize;
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+ struct goldfish_fb *fb = platform_get_drvdata(pdev);
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+
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+ framesize = fb->fb.var.xres_virtual * fb->fb.var.yres_virtual * 2;
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+
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+#ifdef CONFIG_ANDROID_POWER
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+ android_unregister_early_suspend(&fb->early_suspend);
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+#endif
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+ unregister_framebuffer(&fb->fb);
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+ free_irq(fb->irq, fb);
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+ dma_free_writecombine(&pdev->dev, framesize, fb->fb.screen_base, fb->fb.fix.smem_start);
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+ kfree(fb);
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+ return 0;
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+}
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+
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+
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+static struct platform_driver goldfish_fb_driver = {
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+ .probe = goldfish_fb_probe,
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+ .remove = goldfish_fb_remove,
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+ .driver = {
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+ .name = "goldfish_fb"
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+ }
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+};
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+
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+static int __init goldfish_fb_init(void)
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+{
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+ return platform_driver_register(&goldfish_fb_driver);
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+}
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+
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+static void __exit goldfish_fb_exit(void)
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+{
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+ platform_driver_unregister(&goldfish_fb_driver);
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+}
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+
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+module_init(goldfish_fb_init);
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+module_exit(goldfish_fb_exit);
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+
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