s3c2410fb: source code improvements
This patch: - moves more display mode preparations to s3c2410fb_check_var() - reduces number of fields in s3c2410fb_info - removes redundant values setting in s3c2410fb_probe() - removes static mach_info pointer - releases fb_info structure in s3c2410fb_remove() - changes s3c2410fb_init to __init from __devinit - fixes few typos in comments and removes unused includes Signed-off-by: Krzysztof Helt <krzysztof.h1@wp.pl> Signed-off-by: Antonino Daplas <adaplas@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Krzysztof Helt
Linus Torvalds
parent
84902b7af6
commit
9fa7bc016a
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@ -20,7 +20,7 @@
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*
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* 2004-12-04: Arnaud Patard <arnaud.patard@rtp-net.org>
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* - Added the possibility to set on or off the
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* debugging mesaages
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* debugging messages
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* - Replaced 0 and 1 by on or off when reading the
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* /sys files
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*
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@ -31,7 +31,7 @@
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* - add pixel clock divisor control
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*
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* 2004-11-11: Arnaud Patard <arnaud.patard@rtp-net.org>
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* - Removed the use of currcon as it no more exist
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* - Removed the use of currcon as it no more exists
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* - Added LCD power sysfs interface
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*
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* 2004-11-03: Ben Dooks <ben-linux@fluff.org>
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@ -82,13 +82,10 @@
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#include <linux/init.h>
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#include <linux/dma-mapping.h>
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#include <linux/interrupt.h>
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#include <linux/workqueue.h>
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#include <linux/wait.h>
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#include <linux/platform_device.h>
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#include <linux/clk.h>
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#include <asm/io.h>
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#include <asm/uaccess.h>
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#include <asm/div64.h>
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#include <asm/mach/map.h>
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@ -102,8 +99,6 @@
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#include "s3c2410fb.h"
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static struct s3c2410fb_mach_info *mach_info;
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/* Debugging stuff */
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#ifdef CONFIG_FB_S3C2410_DEBUG
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static int debug = 1;
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@ -122,17 +117,16 @@ static int debug = 0;
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static void s3c2410fb_set_lcdaddr(struct fb_info *info)
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{
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unsigned long saddr1, saddr2, saddr3;
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int line_length = info->var.xres * info->var.bits_per_pixel;
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struct s3c2410fb_info *fbi = info->par;
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void __iomem *regs = fbi->io;
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saddr1 = info->fix.smem_start >> 1;
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saddr2 = info->fix.smem_start;
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saddr2 += (line_length * info->var.yres) / 8;
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saddr2 += info->fix.line_length * info->var.yres;
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saddr2 >>= 1;
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saddr3 = S3C2410_OFFSIZE(0) |
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S3C2410_PAGEWIDTH((line_length / 16) & 0x3ff);
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S3C2410_PAGEWIDTH((info->fix.line_length / 2) & 0x3ff);
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dprintk("LCDSADDR1 = 0x%08lx\n", saddr1);
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dprintk("LCDSADDR2 = 0x%08lx\n", saddr2);
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@ -153,14 +147,14 @@ static unsigned int s3c2410fb_calc_pixclk(struct s3c2410fb_info *fbi,
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unsigned long clk = clk_get_rate(fbi->clk);
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unsigned long long div;
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/* pixclk is in picoseoncds, our clock is in Hz
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/* pixclk is in picoseconds, our clock is in Hz
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*
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* Hz -> picoseconds is / 10^-12
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*/
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div = (unsigned long long)clk * pixclk;
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do_div(div, 1000000UL);
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do_div(div, 1000000UL);
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div >>= 12; /* div / 2^12 */
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do_div(div, 625 * 625UL * 625); /* div / 5^12 */
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dprintk("pixclk %ld, divisor is %ld\n", pixclk, (long)div);
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return div;
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@ -176,7 +170,7 @@ static int s3c2410fb_check_var(struct fb_var_screeninfo *var,
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struct fb_info *info)
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{
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struct s3c2410fb_info *fbi = info->par;
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struct s3c2410fb_mach_info *mach_info = fbi->mach_info;
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struct s3c2410fb_mach_info *mach_info = fbi->dev->platform_data;
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struct s3c2410fb_display *display = NULL;
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unsigned i;
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@ -189,7 +183,6 @@ static int s3c2410fb_check_var(struct fb_var_screeninfo *var,
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var->xres == mach_info->displays[i].xres &&
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var->bits_per_pixel == mach_info->displays[i].bpp) {
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display = mach_info->displays + i;
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fbi->current_display = i;
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break;
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}
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@ -202,10 +195,22 @@ static int s3c2410fb_check_var(struct fb_var_screeninfo *var,
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/* it is always the size as the display */
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var->xres_virtual = display->xres;
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var->yres_virtual = display->yres;
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var->height = display->height;
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var->width = display->width;
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/* copy lcd settings */
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var->left_margin = display->left_margin;
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var->right_margin = display->right_margin;
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var->upper_margin = display->upper_margin;
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var->lower_margin = display->lower_margin;
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var->vsync_len = display->vsync_len;
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var->hsync_len = display->hsync_len;
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fbi->regs.lcdcon1 = display->lcdcon1;
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fbi->regs.lcdcon5 = display->lcdcon5;
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/* set display type */
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fbi->regs.lcdcon1 &= ~S3C2410_LCDCON1_TFT;
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fbi->regs.lcdcon1 |= display->type;
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var->transp.offset = 0;
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var->transp.length = 0;
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@ -420,19 +425,13 @@ static void s3c2410fb_activate_var(struct fb_info *info)
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{
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struct s3c2410fb_info *fbi = info->par;
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void __iomem *regs = fbi->io;
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int type = fbi->regs.lcdcon1 & S3C2410_LCDCON1_TFT;
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struct fb_var_screeninfo *var = &info->var;
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struct s3c2410fb_mach_info *mach_info = fbi->mach_info;
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struct s3c2410fb_display *display = mach_info->displays +
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fbi->current_display;
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/* set display type */
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fbi->regs.lcdcon1 &= ~S3C2410_LCDCON1_TFT;
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fbi->regs.lcdcon1 |= display->type;
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if (var->pixclock > 0) {
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int clkdiv = s3c2410fb_calc_pixclk(fbi, var->pixclock);
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if (display->type == S3C2410_LCDCON1_TFT) {
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if (type == S3C2410_LCDCON1_TFT) {
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clkdiv = (clkdiv / 2) - 1;
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if (clkdiv < 0)
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clkdiv = 0;
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@ -446,7 +445,7 @@ static void s3c2410fb_activate_var(struct fb_info *info)
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fbi->regs.lcdcon1 |= S3C2410_LCDCON1_CLKVAL(clkdiv);
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}
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if (display->type == S3C2410_LCDCON1_TFT)
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if (type == S3C2410_LCDCON1_TFT)
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s3c2410fb_calculate_tft_lcd_regs(info, &fbi->regs);
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else
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s3c2410fb_calculate_stn_lcd_regs(info, &fbi->regs);
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@ -470,6 +469,7 @@ static void s3c2410fb_activate_var(struct fb_info *info)
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/* set lcd address pointers */
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s3c2410fb_set_lcdaddr(info);
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fbi->regs.lcdcon1 |= S3C2410_LCDCON1_ENVID,
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writel(fbi->regs.lcdcon1, regs + S3C2410_LCDCON1);
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}
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@ -566,9 +566,9 @@ static int s3c2410fb_setcolreg(unsigned regno,
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if (regno < 256) {
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/* currently assume RGB 5-6-5 mode */
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val = ((red >> 0) & 0xf800);
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val |= ((green >> 5) & 0x07e0);
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val |= ((blue >> 11) & 0x001f);
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val = (red >> 0) & 0xf800;
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val |= (green >> 5) & 0x07e0;
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val |= (blue >> 11) & 0x001f;
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writel(val, regs + S3C2410_TFTPAL(regno));
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schedule_palette_update(fbi, regno, val);
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@ -606,9 +606,6 @@ static int s3c2410fb_blank(int blank_mode, struct fb_info *info)
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dprintk("blank(mode=%d, info=%p)\n", blank_mode, info);
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if (mach_info == NULL)
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return -EINVAL;
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if (blank_mode == FB_BLANK_UNBLANK)
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writel(0x0, regs + S3C2410_TPAL);
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else {
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@ -624,13 +621,11 @@ static int s3c2410fb_debug_show(struct device *dev,
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{
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return snprintf(buf, PAGE_SIZE, "%s\n", debug ? "on" : "off");
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}
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static int s3c2410fb_debug_store(struct device *dev,
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struct device_attribute *attr,
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const char *buf, size_t len)
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{
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if (mach_info == NULL)
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return -EINVAL;
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if (len < 1)
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return -EINVAL;
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@ -673,36 +668,35 @@ static struct fb_ops s3c2410fb_ops = {
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static int __init s3c2410fb_map_video_memory(struct fb_info *info)
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{
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struct s3c2410fb_info *fbi = info->par;
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dma_addr_t map_dma;
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unsigned map_size = PAGE_ALIGN(info->fix.smem_len);
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dprintk("map_video_memory(fbi=%p)\n", fbi);
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fbi->map_size = PAGE_ALIGN(info->fix.smem_len + PAGE_SIZE);
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fbi->map_cpu = dma_alloc_writecombine(fbi->dev, fbi->map_size,
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&fbi->map_dma, GFP_KERNEL);
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info->screen_base = dma_alloc_writecombine(fbi->dev, map_size,
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&map_dma, GFP_KERNEL);
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fbi->map_size = info->fix.smem_len;
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if (fbi->map_cpu) {
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if (info->screen_base) {
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/* prevent initial garbage on screen */
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dprintk("map_video_memory: clear %p:%08x\n",
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fbi->map_cpu, fbi->map_size);
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memset(fbi->map_cpu, 0xf0, fbi->map_size);
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info->screen_base, map_size);
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memset(info->screen_base, 0xf0, map_size);
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fbi->screen_dma = fbi->map_dma;
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info->screen_base = fbi->map_cpu;
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info->fix.smem_start = fbi->screen_dma;
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info->fix.smem_start = map_dma;
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dprintk("map_video_memory: dma=%08x cpu=%p size=%08x\n",
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fbi->map_dma, fbi->map_cpu, info->fix.smem_len);
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dprintk("map_video_memory: dma=%08lx cpu=%p size=%08x\n",
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info->fix.smem_start, info->screen_base, map_size);
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}
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return fbi->map_cpu ? 0 : -ENOMEM;
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return info->screen_base ? 0 : -ENOMEM;
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}
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static inline void s3c2410fb_unmap_video_memory(struct s3c2410fb_info *fbi)
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static inline void s3c2410fb_unmap_video_memory(struct fb_info *info)
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{
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dma_free_writecombine(fbi->dev, fbi->map_size, fbi->map_cpu,
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fbi->map_dma);
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struct s3c2410fb_info *fbi = info->par;
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dma_free_writecombine(fbi->dev, PAGE_ALIGN(info->fix.smem_len),
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info->screen_base, info->fix.smem_start);
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}
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static inline void modify_gpio(void __iomem *reg,
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@ -720,6 +714,7 @@ static inline void modify_gpio(void __iomem *reg,
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static int s3c2410fb_init_registers(struct fb_info *info)
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{
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struct s3c2410fb_info *fbi = info->par;
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struct s3c2410fb_mach_info *mach_info = fbi->dev->platform_data;
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unsigned long flags;
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void __iomem *regs = fbi->io;
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@ -736,14 +731,6 @@ static int s3c2410fb_init_registers(struct fb_info *info)
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local_irq_restore(flags);
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writel(fbi->regs.lcdcon1, regs + S3C2410_LCDCON1);
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writel(fbi->regs.lcdcon2, regs + S3C2410_LCDCON2);
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writel(fbi->regs.lcdcon3, regs + S3C2410_LCDCON3);
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writel(fbi->regs.lcdcon4, regs + S3C2410_LCDCON4);
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writel(fbi->regs.lcdcon5, regs + S3C2410_LCDCON5);
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s3c2410fb_set_lcdaddr(info);
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dprintk("LPCSEL = 0x%08lx\n", mach_info->lpcsel);
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writel(mach_info->lpcsel, regs + S3C2410_LPCSEL);
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@ -752,9 +739,6 @@ static int s3c2410fb_init_registers(struct fb_info *info)
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/* ensure temporary palette disabled */
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writel(0x00, regs + S3C2410_TPAL);
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/* Enable video by setting the ENVID bit to 1 */
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fbi->regs.lcdcon1 |= S3C2410_LCDCON1_ENVID;
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writel(fbi->regs.lcdcon1, regs + S3C2410_LCDCON1);
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return 0;
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}
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@ -808,6 +792,7 @@ static int __init s3c2410fb_probe(struct platform_device *pdev)
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struct s3c2410fb_info *info;
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struct s3c2410fb_display *display;
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struct fb_info *fbinfo;
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struct s3c2410fb_mach_info *mach_info;
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struct resource *res;
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int ret;
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int irq;
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@ -834,6 +819,8 @@ static int __init s3c2410fb_probe(struct platform_device *pdev)
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if (!fbinfo)
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return -ENOMEM;
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platform_set_drvdata(pdev, fbinfo);
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info = fbinfo->par;
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info->dev = &pdev->dev;
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@ -859,23 +846,14 @@ static int __init s3c2410fb_probe(struct platform_device *pdev)
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goto release_mem;
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}
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platform_set_drvdata(pdev, fbinfo);
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dprintk("devinit\n");
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strcpy(fbinfo->fix.id, driver_name);
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info->regs.lcdcon1 = display->lcdcon1;
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info->regs.lcdcon5 = display->lcdcon5;
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/* Stop the video and unset ENVID if set */
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info->regs.lcdcon1 &= ~S3C2410_LCDCON1_ENVID;
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/* Stop the video */
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lcdcon1 = readl(info->io + S3C2410_LCDCON1);
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writel(lcdcon1 & ~S3C2410_LCDCON1_ENVID, info->io + S3C2410_LCDCON1);
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info->mach_info = pdev->dev.platform_data;
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info->current_display = mach_info->default_display;
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fbinfo->fix.type = FB_TYPE_PACKED_PIXELS;
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fbinfo->fix.type_aux = 0;
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fbinfo->fix.xpanstep = 0;
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@ -885,8 +863,6 @@ static int __init s3c2410fb_probe(struct platform_device *pdev)
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fbinfo->var.nonstd = 0;
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fbinfo->var.activate = FB_ACTIVATE_NOW;
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fbinfo->var.height = display->height;
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fbinfo->var.width = display->width;
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fbinfo->var.accel_flags = 0;
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fbinfo->var.vmode = FB_VMODE_NONINTERLACED;
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@ -894,39 +870,6 @@ static int __init s3c2410fb_probe(struct platform_device *pdev)
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fbinfo->flags = FBINFO_FLAG_DEFAULT;
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fbinfo->pseudo_palette = &info->pseudo_pal;
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fbinfo->var.xres = display->xres;
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fbinfo->var.xres_virtual = display->xres;
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fbinfo->var.yres = display->yres;
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fbinfo->var.yres_virtual = display->yres;
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fbinfo->var.bits_per_pixel = display->bpp;
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fbinfo->var.left_margin = display->left_margin;
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fbinfo->var.right_margin = display->right_margin;
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fbinfo->var.upper_margin = display->upper_margin;
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fbinfo->var.lower_margin = display->lower_margin;
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fbinfo->var.vsync_len = display->vsync_len;
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fbinfo->var.hsync_len = display->hsync_len;
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fbinfo->var.red.offset = 11;
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fbinfo->var.green.offset = 5;
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fbinfo->var.blue.offset = 0;
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fbinfo->var.transp.offset = 0;
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fbinfo->var.red.length = 5;
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fbinfo->var.green.length = 6;
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fbinfo->var.blue.length = 5;
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fbinfo->var.transp.length = 0;
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/* find maximum required memory size for display */
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for (i = 0; i < mach_info->num_displays; i++) {
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unsigned long smem_len = mach_info->displays[i].xres;
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smem_len *= mach_info->displays[i].yres;
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smem_len *= mach_info->displays[i].bpp;
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smem_len >>= 3;
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if (fbinfo->fix.smem_len < smem_len)
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fbinfo->fix.smem_len = smem_len;
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}
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for (i = 0; i < 256; i++)
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info->palette_buffer[i] = PALETTE_BUFF_CLEAR;
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@ -949,6 +892,17 @@ static int __init s3c2410fb_probe(struct platform_device *pdev)
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msleep(1);
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/* find maximum required memory size for display */
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for (i = 0; i < mach_info->num_displays; i++) {
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unsigned long smem_len = mach_info->displays[i].xres;
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|
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smem_len *= mach_info->displays[i].yres;
|
||||
smem_len *= mach_info->displays[i].bpp;
|
||||
smem_len >>= 3;
|
||||
if (fbinfo->fix.smem_len < smem_len)
|
||||
fbinfo->fix.smem_len = smem_len;
|
||||
}
|
||||
|
||||
/* Initialize video memory */
|
||||
ret = s3c2410fb_map_video_memory(fbinfo);
|
||||
if (ret) {
|
||||
|
|
@ -959,6 +913,10 @@ static int __init s3c2410fb_probe(struct platform_device *pdev)
|
|||
|
||||
dprintk("got video memory\n");
|
||||
|
||||
fbinfo->var.xres = display->xres;
|
||||
fbinfo->var.yres = display->yres;
|
||||
fbinfo->var.bits_per_pixel = display->bpp;
|
||||
|
||||
s3c2410fb_init_registers(fbinfo);
|
||||
|
||||
s3c2410fb_check_var(&fbinfo->var, fbinfo);
|
||||
|
|
@ -979,7 +937,7 @@ static int __init s3c2410fb_probe(struct platform_device *pdev)
|
|||
return 0;
|
||||
|
||||
free_video_memory:
|
||||
s3c2410fb_unmap_video_memory(info);
|
||||
s3c2410fb_unmap_video_memory(fbinfo);
|
||||
release_clock:
|
||||
clk_disable(info->clk);
|
||||
clk_put(info->clk);
|
||||
|
|
@ -991,6 +949,7 @@ release_mem:
|
|||
release_resource(info->mem);
|
||||
kfree(info->mem);
|
||||
dealloc_fb:
|
||||
platform_set_drvdata(pdev, NULL);
|
||||
framebuffer_release(fbinfo);
|
||||
return ret;
|
||||
}
|
||||
|
|
@ -1020,10 +979,12 @@ static int s3c2410fb_remove(struct platform_device *pdev)
|
|||
struct s3c2410fb_info *info = fbinfo->par;
|
||||
int irq;
|
||||
|
||||
unregister_framebuffer(fbinfo);
|
||||
|
||||
s3c2410fb_stop_lcd(info);
|
||||
msleep(1);
|
||||
|
||||
s3c2410fb_unmap_video_memory(info);
|
||||
s3c2410fb_unmap_video_memory(fbinfo);
|
||||
|
||||
if (info->clk) {
|
||||
clk_disable(info->clk);
|
||||
|
|
@ -1034,10 +995,13 @@ static int s3c2410fb_remove(struct platform_device *pdev)
|
|||
irq = platform_get_irq(pdev, 0);
|
||||
free_irq(irq, info);
|
||||
|
||||
iounmap(info->io);
|
||||
|
||||
release_resource(info->mem);
|
||||
kfree(info->mem);
|
||||
iounmap(info->io);
|
||||
unregister_framebuffer(fbinfo);
|
||||
|
||||
platform_set_drvdata(pdev, NULL);
|
||||
framebuffer_release(fbinfo);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
|
@ -1091,7 +1055,7 @@ static struct platform_driver s3c2410fb_driver = {
|
|||
},
|
||||
};
|
||||
|
||||
int __devinit s3c2410fb_init(void)
|
||||
int __init s3c2410fb_init(void)
|
||||
{
|
||||
return platform_driver_register(&s3c2410fb_driver);
|
||||
}
|
||||
|
|
|
|||
|
|
@ -16,7 +16,7 @@
|
|||
*
|
||||
* 2004-09-07: Arnaud Patard <arnaud.patard@rtp-net.org>
|
||||
* - Renamed from h1940fb.h to s3c2410fb.h
|
||||
* - Chenged h1940 to s3c2410
|
||||
* - Changed h1940 to s3c2410
|
||||
*
|
||||
* 2004-07-15: Arnaud Patard <arnaud.patard@rtp-net.org>
|
||||
* - First version
|
||||
|
|
@ -32,20 +32,8 @@ struct s3c2410fb_info {
|
|||
struct resource *mem;
|
||||
void __iomem *io;
|
||||
|
||||
struct s3c2410fb_mach_info *mach_info;
|
||||
|
||||
unsigned current_display;
|
||||
|
||||
/* raw memory addresses */
|
||||
dma_addr_t map_dma; /* physical */
|
||||
u_char * map_cpu; /* virtual */
|
||||
u_int map_size;
|
||||
|
||||
struct s3c2410fb_hw regs;
|
||||
|
||||
/* addresses of pieces placed in raw buffer */
|
||||
u_char * screen_cpu; /* virtual address of buffer */
|
||||
dma_addr_t screen_dma; /* physical address of buffer */
|
||||
unsigned int palette_ready;
|
||||
|
||||
/* keep these registers in case we need to re-write palette */
|
||||
|
|
|
|||
Reference in New Issue