![Stepan Moskovchenko](/assets/img/avatar_default.png)
Qualcomm development of the MSM SOC framebuffer driver has diverged significantly from the driver used by Android. This is a snapshot of our current driver, in all it's agony. We are putting this in staging to help with the process of converging the two drivers. At this point, the driver has been tested only in dumb framebuffer mode. Signed-off-by: Stepan Moskovchenko <stepanm@codeaurora.org> Signed-off-by: David Brown <davidb@codeaurora.org> Signed-off-by: Abhijeet Dharmapurikar <adharmap@codeaurora.org> [dwalker@codeaurora.org: added a small compile fix and TODO.] Signed-off-by: Daniel Walker <dwalker@codeaurora.org> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
182 lines
4 KiB
C
182 lines
4 KiB
C
/* Copyright (c) 2009, Code Aurora Forum. All rights reserved.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 and
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* only version 2 as published by the Free Software Foundation.
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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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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
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* 02110-1301, USA.
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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/sched.h>
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#include <linux/time.h>
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#include <linux/init.h>
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#include <linux/interrupt.h>
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#include <linux/spinlock.h>
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#include <linux/hrtimer.h>
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#include <linux/clk.h>
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#include <mach/hardware.h>
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#include <linux/io.h>
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#include <linux/debugfs.h>
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#include <asm/system.h>
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#include <asm/mach-types.h>
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#include <linux/semaphore.h>
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#include <linux/uaccess.h>
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#include "mdp.h"
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#include "msm_fb.h"
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#include "mdp4.h"
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#define MDP4_DEBUG_BUF 128
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static char mdp4_debug_buf[MDP4_DEBUG_BUF];
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static ulong mdp4_debug_offset;
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static ulong mdp4_base_addr;
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static int mdp4_offset_set(void *data, u64 val)
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{
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mdp4_debug_offset = (int)val;
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return 0;
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}
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static int mdp4_offset_get(void *data, u64 *val)
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{
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*val = (u64)mdp4_debug_offset;
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return 0;
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}
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DEFINE_SIMPLE_ATTRIBUTE(
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mdp4_offset_fops,
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mdp4_offset_get,
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mdp4_offset_set,
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"%llx\n");
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static int mdp4_debugfs_open(struct inode *inode, struct file *file)
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{
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/* non-seekable */
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file->f_mode &= ~(FMODE_LSEEK | FMODE_PREAD | FMODE_PWRITE);
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return 0;
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}
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static int mdp4_debugfs_release(struct inode *inode, struct file *file)
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{
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return 0;
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}
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static ssize_t mdp4_debugfs_write(
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struct file *file,
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const char __user *buff,
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size_t count,
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loff_t *ppos)
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{
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int cnt;
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unsigned int data;
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printk(KERN_INFO "%s: offset=%d count=%d *ppos=%d\n",
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__func__, (int)mdp4_debug_offset, (int)count, (int)*ppos);
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if (count > sizeof(mdp4_debug_buf))
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return -EFAULT;
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if (copy_from_user(mdp4_debug_buf, buff, count))
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return -EFAULT;
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mdp4_debug_buf[count] = 0; /* end of string */
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cnt = sscanf(mdp4_debug_buf, "%x", &data);
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if (cnt < 1) {
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printk(KERN_ERR "%s: sscanf failed cnt=%d" , __func__, cnt);
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return -EINVAL;
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}
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writel(&data, mdp4_base_addr + mdp4_debug_offset);
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return 0;
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}
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static ssize_t mdp4_debugfs_read(
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struct file *file,
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char __user *buff,
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size_t count,
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loff_t *ppos)
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{
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int len = 0;
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unsigned int data;
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printk(KERN_INFO "%s: offset=%d count=%d *ppos=%d\n",
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__func__, (int)mdp4_debug_offset, (int)count, (int)*ppos);
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if (*ppos)
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return 0; /* the end */
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data = readl(mdp4_base_addr + mdp4_debug_offset);
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len = snprintf(mdp4_debug_buf, 4, "%x\n", data);
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if (len > 0) {
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if (len > count)
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len = count;
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if (copy_to_user(buff, mdp4_debug_buf, len))
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return -EFAULT;
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}
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printk(KERN_INFO "%s: len=%d\n", __func__, len);
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if (len < 0)
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return 0;
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*ppos += len; /* increase offset */
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return len;
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}
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static const struct file_operations mdp4_debugfs_fops = {
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.open = mdp4_debugfs_open,
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.release = mdp4_debugfs_release,
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.read = mdp4_debugfs_read,
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.write = mdp4_debugfs_write,
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};
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int mdp4_debugfs_init(void)
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{
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struct dentry *dent = debugfs_create_dir("mdp4", NULL);
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if (IS_ERR(dent)) {
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printk(KERN_ERR "%s(%d): debugfs_create_dir fail, error %ld\n",
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__FILE__, __LINE__, PTR_ERR(dent));
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return -1;
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}
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if (debugfs_create_file("offset", 0644, dent, 0, &mdp4_offset_fops)
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== NULL) {
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printk(KERN_ERR "%s(%d): debugfs_create_file: offset fail\n",
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__FILE__, __LINE__);
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return -1;
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}
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if (debugfs_create_file("regs", 0644, dent, 0, &mdp4_debugfs_fops)
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== NULL) {
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printk(KERN_ERR "%s(%d): debugfs_create_file: regs fail\n",
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__FILE__, __LINE__);
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return -1;
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}
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mdp4_debug_offset = 0;
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mdp4_base_addr = (ulong) msm_mdp_base; /* defined at msm_fb_def.h */
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return 0;
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}
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