2010-11-08 16:42:39 -07:00
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/*
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* WonderMedia WM8505 Frame Buffer device driver
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*
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* Copyright (C) 2010 Ed Spiridonov <edo.rus@gmail.com>
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* Based on vt8500lcdfb.c
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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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#include <linux/module.h>
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#include <linux/kernel.h>
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#include <linux/errno.h>
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#include <linux/string.h>
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#include <linux/mm.h>
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#include <linux/slab.h>
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#include <linux/delay.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/io.h>
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#include <linux/dma-mapping.h>
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#include <linux/platform_device.h>
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#include <linux/wait.h>
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#include <mach/vt8500fb.h>
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#include "wm8505fb_regs.h"
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#include "wmt_ge_rops.h"
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#define DRIVER_NAME "wm8505-fb"
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#define to_wm8505fb_info(__info) container_of(__info, \
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struct wm8505fb_info, fb)
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struct wm8505fb_info {
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struct fb_info fb;
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void __iomem *regbase;
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unsigned int contrast;
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};
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static int wm8505fb_init_hw(struct fb_info *info)
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{
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struct wm8505fb_info *fbi = to_wm8505fb_info(info);
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int i;
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/* I know the purpose only of few registers, so clear unknown */
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for (i = 0; i < 0x200; i += 4)
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writel(0, fbi->regbase + i);
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/* Set frame buffer address */
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writel(fbi->fb.fix.smem_start, fbi->regbase + WMT_GOVR_FBADDR);
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writel(fbi->fb.fix.smem_start, fbi->regbase + WMT_GOVR_FBADDR1);
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/* Set in-memory picture format to RGB 32bpp */
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writel(0x1c, fbi->regbase + WMT_GOVR_COLORSPACE);
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writel(1, fbi->regbase + WMT_GOVR_COLORSPACE1);
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/* Virtual buffer size */
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writel(info->var.xres, fbi->regbase + WMT_GOVR_XRES);
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writel(info->var.xres_virtual, fbi->regbase + WMT_GOVR_XRES_VIRTUAL);
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/* black magic ;) */
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writel(0xf, fbi->regbase + WMT_GOVR_FHI);
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writel(4, fbi->regbase + WMT_GOVR_DVO_SET);
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writel(1, fbi->regbase + WMT_GOVR_MIF_ENABLE);
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writel(1, fbi->regbase + WMT_GOVR_REG_UPDATE);
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return 0;
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}
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static int wm8505fb_set_timing(struct fb_info *info)
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{
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struct wm8505fb_info *fbi = to_wm8505fb_info(info);
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int h_start = info->var.left_margin;
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int h_end = h_start + info->var.xres;
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int h_all = h_end + info->var.right_margin;
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int h_sync = info->var.hsync_len;
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int v_start = info->var.upper_margin;
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int v_end = v_start + info->var.yres;
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int v_all = v_end + info->var.lower_margin;
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int v_sync = info->var.vsync_len + 1;
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writel(0, fbi->regbase + WMT_GOVR_TG);
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writel(h_start, fbi->regbase + WMT_GOVR_TIMING_H_START);
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writel(h_end, fbi->regbase + WMT_GOVR_TIMING_H_END);
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writel(h_all, fbi->regbase + WMT_GOVR_TIMING_H_ALL);
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writel(h_sync, fbi->regbase + WMT_GOVR_TIMING_H_SYNC);
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writel(v_start, fbi->regbase + WMT_GOVR_TIMING_V_START);
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writel(v_end, fbi->regbase + WMT_GOVR_TIMING_V_END);
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writel(v_all, fbi->regbase + WMT_GOVR_TIMING_V_ALL);
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writel(v_sync, fbi->regbase + WMT_GOVR_TIMING_V_SYNC);
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writel(1, fbi->regbase + WMT_GOVR_TG);
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return 0;
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}
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static int wm8505fb_set_par(struct fb_info *info)
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{
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struct wm8505fb_info *fbi = to_wm8505fb_info(info);
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if (!fbi)
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return -EINVAL;
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if (info->var.bits_per_pixel == 32) {
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info->var.red.offset = 16;
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info->var.red.length = 8;
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info->var.red.msb_right = 0;
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info->var.green.offset = 8;
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info->var.green.length = 8;
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info->var.green.msb_right = 0;
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info->var.blue.offset = 0;
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info->var.blue.length = 8;
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info->var.blue.msb_right = 0;
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info->fix.visual = FB_VISUAL_TRUECOLOR;
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info->fix.line_length = info->var.xres_virtual << 2;
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}
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wm8505fb_set_timing(info);
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writel(fbi->contrast<<16 | fbi->contrast<<8 | fbi->contrast,
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fbi->regbase + WMT_GOVR_CONTRAST);
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return 0;
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}
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static ssize_t contrast_show(struct device *dev,
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struct device_attribute *attr, char *buf)
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{
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struct fb_info *info = dev_get_drvdata(dev);
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struct wm8505fb_info *fbi = to_wm8505fb_info(info);
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return sprintf(buf, "%d\n", fbi->contrast);
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}
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static ssize_t contrast_store(struct device *dev,
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struct device_attribute *attr,
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const char *buf, size_t count)
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{
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struct fb_info *info = dev_get_drvdata(dev);
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struct wm8505fb_info *fbi = to_wm8505fb_info(info);
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unsigned long tmp;
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if (strict_strtoul(buf, 10, &tmp) || (tmp > 0xff))
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return -EINVAL;
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fbi->contrast = tmp;
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wm8505fb_set_par(info);
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return count;
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}
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static DEVICE_ATTR(contrast, 0644, contrast_show, contrast_store);
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static inline u_int chan_to_field(u_int chan, struct fb_bitfield *bf)
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{
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chan &= 0xffff;
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chan >>= 16 - bf->length;
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return chan << bf->offset;
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}
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static int wm8505fb_setcolreg(unsigned regno, unsigned red, unsigned green,
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unsigned blue, unsigned transp,
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struct fb_info *info) {
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struct wm8505fb_info *fbi = to_wm8505fb_info(info);
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int ret = 1;
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unsigned int val;
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if (regno >= 256)
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return -EINVAL;
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if (info->var.grayscale)
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red = green = blue =
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(19595 * red + 38470 * green + 7471 * blue) >> 16;
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switch (fbi->fb.fix.visual) {
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case FB_VISUAL_TRUECOLOR:
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if (regno < 16) {
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u32 *pal = info->pseudo_palette;
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val = chan_to_field(red, &fbi->fb.var.red);
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val |= chan_to_field(green, &fbi->fb.var.green);
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val |= chan_to_field(blue, &fbi->fb.var.blue);
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pal[regno] = val;
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ret = 0;
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}
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break;
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}
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return ret;
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}
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static int wm8505fb_pan_display(struct fb_var_screeninfo *var,
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struct fb_info *info)
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{
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struct wm8505fb_info *fbi = to_wm8505fb_info(info);
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writel(var->xoffset, fbi->regbase + WMT_GOVR_XPAN);
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writel(var->yoffset, fbi->regbase + WMT_GOVR_YPAN);
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return 0;
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}
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static int wm8505fb_blank(int blank, struct fb_info *info)
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{
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struct wm8505fb_info *fbi = to_wm8505fb_info(info);
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switch (blank) {
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case FB_BLANK_UNBLANK:
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wm8505fb_set_timing(info);
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break;
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default:
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writel(0, fbi->regbase + WMT_GOVR_TIMING_V_SYNC);
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break;
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}
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return 0;
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}
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static struct fb_ops wm8505fb_ops = {
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.owner = THIS_MODULE,
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.fb_set_par = wm8505fb_set_par,
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.fb_setcolreg = wm8505fb_setcolreg,
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.fb_fillrect = wmt_ge_fillrect,
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.fb_copyarea = wmt_ge_copyarea,
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.fb_imageblit = sys_imageblit,
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.fb_sync = wmt_ge_sync,
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.fb_pan_display = wm8505fb_pan_display,
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.fb_blank = wm8505fb_blank,
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};
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static int __devinit wm8505fb_probe(struct platform_device *pdev)
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{
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struct wm8505fb_info *fbi;
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struct resource *res;
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void *addr;
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struct vt8500fb_platform_data *pdata;
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int ret;
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pdata = pdev->dev.platform_data;
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ret = -ENOMEM;
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fbi = NULL;
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fbi = kzalloc(sizeof(struct wm8505fb_info) + sizeof(u32) * 16,
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GFP_KERNEL);
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if (!fbi) {
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dev_err(&pdev->dev, "Failed to initialize framebuffer device\n");
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ret = -ENOMEM;
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goto failed;
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}
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strcpy(fbi->fb.fix.id, DRIVER_NAME);
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fbi->fb.fix.type = FB_TYPE_PACKED_PIXELS;
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fbi->fb.fix.xpanstep = 1;
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fbi->fb.fix.ypanstep = 1;
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fbi->fb.fix.ywrapstep = 0;
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fbi->fb.fix.accel = FB_ACCEL_NONE;
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fbi->fb.fbops = &wm8505fb_ops;
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fbi->fb.flags = FBINFO_DEFAULT
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| FBINFO_HWACCEL_COPYAREA
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| FBINFO_HWACCEL_FILLRECT
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| FBINFO_HWACCEL_XPAN
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| FBINFO_HWACCEL_YPAN
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| FBINFO_VIRTFB
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| FBINFO_PARTIAL_PAN_OK;
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fbi->fb.node = -1;
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addr = fbi;
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addr = addr + sizeof(struct wm8505fb_info);
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fbi->fb.pseudo_palette = addr;
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res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
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if (res == NULL) {
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dev_err(&pdev->dev, "no I/O memory resource defined\n");
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ret = -ENODEV;
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goto failed_fbi;
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}
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2010-12-20 06:03:14 -07:00
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res = request_mem_region(res->start, resource_size(res), DRIVER_NAME);
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2010-11-08 16:42:39 -07:00
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if (res == NULL) {
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dev_err(&pdev->dev, "failed to request I/O memory\n");
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ret = -EBUSY;
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goto failed_fbi;
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}
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fbi->regbase = ioremap(res->start, resource_size(res));
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if (fbi->regbase == NULL) {
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dev_err(&pdev->dev, "failed to map I/O memory\n");
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ret = -EBUSY;
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goto failed_free_res;
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}
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fb_videomode_to_var(&fbi->fb.var, &pdata->mode);
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fbi->fb.var.nonstd = 0;
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fbi->fb.var.activate = FB_ACTIVATE_NOW;
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fbi->fb.var.height = -1;
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fbi->fb.var.width = -1;
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fbi->fb.var.xres_virtual = pdata->xres_virtual;
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fbi->fb.var.yres_virtual = pdata->yres_virtual;
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fbi->fb.var.bits_per_pixel = pdata->bpp;
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fbi->fb.fix.smem_start = pdata->video_mem_phys;
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fbi->fb.fix.smem_len = pdata->video_mem_len;
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fbi->fb.screen_base = pdata->video_mem_virt;
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fbi->fb.screen_size = pdata->video_mem_len;
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if (fb_alloc_cmap(&fbi->fb.cmap, 256, 0) < 0) {
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dev_err(&pdev->dev, "Failed to allocate color map\n");
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ret = -ENOMEM;
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goto failed_free_io;
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}
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wm8505fb_init_hw(&fbi->fb);
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fbi->contrast = 0x80;
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ret = wm8505fb_set_par(&fbi->fb);
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if (ret) {
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dev_err(&pdev->dev, "Failed to set parameters\n");
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goto failed_free_cmap;
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}
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platform_set_drvdata(pdev, fbi);
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ret = register_framebuffer(&fbi->fb);
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if (ret < 0) {
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dev_err(&pdev->dev,
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"Failed to register framebuffer device: %d\n", ret);
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goto failed_free_cmap;
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}
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ret = device_create_file(&pdev->dev, &dev_attr_contrast);
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if (ret < 0) {
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printk(KERN_WARNING "fb%d: failed to register attributes (%d)\n",
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fbi->fb.node, ret);
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}
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printk(KERN_INFO "fb%d: %s frame buffer at 0x%lx-0x%lx\n",
|
|
|
|
fbi->fb.node, fbi->fb.fix.id, fbi->fb.fix.smem_start,
|
|
|
|
fbi->fb.fix.smem_start + fbi->fb.fix.smem_len - 1);
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
|
|
|
|
failed_free_cmap:
|
|
|
|
if (fbi->fb.cmap.len)
|
|
|
|
fb_dealloc_cmap(&fbi->fb.cmap);
|
|
|
|
failed_free_io:
|
|
|
|
iounmap(fbi->regbase);
|
|
|
|
failed_free_res:
|
|
|
|
release_mem_region(res->start, resource_size(res));
|
|
|
|
failed_fbi:
|
|
|
|
platform_set_drvdata(pdev, NULL);
|
|
|
|
kfree(fbi);
|
|
|
|
failed:
|
|
|
|
return ret;
|
|
|
|
}
|
|
|
|
|
|
|
|
static int __devexit wm8505fb_remove(struct platform_device *pdev)
|
|
|
|
{
|
|
|
|
struct wm8505fb_info *fbi = platform_get_drvdata(pdev);
|
|
|
|
struct resource *res;
|
|
|
|
|
|
|
|
device_remove_file(&pdev->dev, &dev_attr_contrast);
|
|
|
|
|
|
|
|
unregister_framebuffer(&fbi->fb);
|
|
|
|
|
|
|
|
writel(0, fbi->regbase);
|
|
|
|
|
|
|
|
if (fbi->fb.cmap.len)
|
|
|
|
fb_dealloc_cmap(&fbi->fb.cmap);
|
|
|
|
|
|
|
|
iounmap(fbi->regbase);
|
|
|
|
|
|
|
|
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
|
|
|
|
release_mem_region(res->start, resource_size(res));
|
|
|
|
|
|
|
|
kfree(fbi);
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
static struct platform_driver wm8505fb_driver = {
|
|
|
|
.probe = wm8505fb_probe,
|
|
|
|
.remove = __devexit_p(wm8505fb_remove),
|
|
|
|
.driver = {
|
|
|
|
.owner = THIS_MODULE,
|
|
|
|
.name = DRIVER_NAME,
|
|
|
|
},
|
|
|
|
};
|
|
|
|
|
|
|
|
static int __init wm8505fb_init(void)
|
|
|
|
{
|
|
|
|
return platform_driver_register(&wm8505fb_driver);
|
|
|
|
}
|
|
|
|
|
|
|
|
static void __exit wm8505fb_exit(void)
|
|
|
|
{
|
|
|
|
platform_driver_unregister(&wm8505fb_driver);
|
|
|
|
}
|
|
|
|
|
|
|
|
module_init(wm8505fb_init);
|
|
|
|
module_exit(wm8505fb_exit);
|
|
|
|
|
|
|
|
MODULE_AUTHOR("Ed Spiridonov <edo.rus@gmail.com>");
|
|
|
|
MODULE_DESCRIPTION("Framebuffer driver for WMT WM8505");
|
|
|
|
MODULE_LICENSE("GPL");
|