s3c2410fb: code cleanup
This patch cleans up the driver a bit. It contains
coding style fixes (pointed by Lindent and checkpatch),
white space clean ups and few minor code improvements.
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>
diff --git a/drivers/video/s3c2410fb.c b/drivers/video/s3c2410fb.c
index 8a4c647..f103101 100644
--- a/drivers/video/s3c2410fb.c
+++ b/drivers/video/s3c2410fb.c
@@ -31,8 +31,8 @@
* - add pixel clock divisor control
*
* 2004-11-11: Arnaud Patard <arnaud.patard@rtp-net.org>
- * - Removed the use of currcon as it no more exist
- * - Added LCD power sysfs interface
+ * - Removed the use of currcon as it no more exist
+ * - Added LCD power sysfs interface
*
* 2004-11-03: Ben Dooks <ben-linux@fluff.org>
* - minor cleanups
@@ -49,12 +49,12 @@
* - Suppress command line options
*
* 2004-09-15: Arnaud Patard <arnaud.patard@rtp-net.org>
- * - code cleanup
+ * - code cleanup
*
* 2004-09-07: Arnaud Patard <arnaud.patard@rtp-net.org>
- * - Renamed from h1940fb.c to s3c2410fb.c
- * - Add support for different devices
- * - Backlight support
+ * - Renamed from h1940fb.c to s3c2410fb.c
+ * - Add support for different devices
+ * - Backlight support
*
* 2004-09-05: Herbert Pötzl <herbert@13thfloor.at>
* - added clock (de-)allocation code
@@ -102,14 +102,13 @@
#include "s3c2410fb.h"
-
static struct s3c2410fb_mach_info *mach_info;
/* Debugging stuff */
#ifdef CONFIG_FB_S3C2410_DEBUG
-static int debug = 1;
+static int debug = 1;
#else
-static int debug = 0;
+static int debug = 0;
#endif
#define dprintk(msg...) if (debug) { printk(KERN_DEBUG "s3c2410fb: " msg); }
@@ -119,19 +118,20 @@
/* s3c2410fb_set_lcdaddr
*
* initialise lcd controller address pointers
-*/
-
+ */
static void s3c2410fb_set_lcdaddr(struct s3c2410fb_info *fbi)
{
struct fb_var_screeninfo *var = &fbi->fb->var;
unsigned long saddr1, saddr2, saddr3;
+ int line_length = var->xres * var->bits_per_pixel;
saddr1 = fbi->fb->fix.smem_start >> 1;
saddr2 = fbi->fb->fix.smem_start;
- saddr2 += (var->xres * var->yres * var->bits_per_pixel)/8;
- saddr2>>= 1;
+ saddr2 += (line_length * var->yres) / 8;
+ saddr2 >>= 1;
- saddr3 = S3C2410_OFFSIZE(0) | S3C2410_PAGEWIDTH((var->xres * var->bits_per_pixel / 16) & 0x3ff);
+ saddr3 = S3C2410_OFFSIZE(0) |
+ S3C2410_PAGEWIDTH((line_length / 16) & 0x3ff);
dprintk("LCDSADDR1 = 0x%08lx\n", saddr1);
dprintk("LCDSADDR2 = 0x%08lx\n", saddr2);
@@ -145,8 +145,7 @@
/* s3c2410fb_calc_pixclk()
*
* calculate divisor for clk->pixclk
-*/
-
+ */
static unsigned int s3c2410fb_calc_pixclk(struct s3c2410fb_info *fbi,
unsigned long pixclk)
{
@@ -159,8 +158,8 @@
*/
div = (unsigned long long)clk * pixclk;
- do_div(div,1000000UL);
- do_div(div,1000000UL);
+ do_div(div, 1000000UL);
+ do_div(div, 1000000UL);
dprintk("pixclk %ld, divisor is %ld\n", pixclk, (long)div);
return div;
@@ -198,93 +197,84 @@
else if (var->bits_per_pixel < fbi->mach_info->bpp.min)
var->bits_per_pixel = fbi->mach_info->bpp.min;
+ var->transp.offset = 0;
+ var->transp.length = 0;
/* set r/g/b positions */
switch (var->bits_per_pixel) {
- case 1:
- case 2:
- case 4:
- var->red.offset = 0;
- var->red.length = var->bits_per_pixel;
- var->green = var->red;
- var->blue = var->red;
- var->transp.offset = 0;
- var->transp.length = 0;
- break;
- case 8:
- if ( fbi->mach_info->type != S3C2410_LCDCON1_TFT ) {
- /* 8 bpp 332 */
- var->red.length = 3;
- var->red.offset = 5;
- var->green.length = 3;
- var->green.offset = 2;
- var->blue.length = 2;
- var->blue.offset = 0;
- var->transp.length = 0;
- } else {
- var->red.offset = 0;
- var->red.length = var->bits_per_pixel;
- var->green = var->red;
- var->blue = var->red;
- var->transp.offset = 0;
- var->transp.length = 0;
- }
- break;
- case 12:
- /* 12 bpp 444 */
- var->red.length = 4;
- var->red.offset = 8;
- var->green.length = 4;
- var->green.offset = 4;
- var->blue.length = 4;
+ case 1:
+ case 2:
+ case 4:
+ var->red.offset = 0;
+ var->red.length = var->bits_per_pixel;
+ var->green = var->red;
+ var->blue = var->red;
+ break;
+ case 8:
+ if (fbi->mach_info->type != S3C2410_LCDCON1_TFT) {
+ /* 8 bpp 332 */
+ var->red.length = 3;
+ var->red.offset = 5;
+ var->green.length = 3;
+ var->green.offset = 2;
+ var->blue.length = 2;
var->blue.offset = 0;
- var->transp.length = 0;
- break;
-
- default:
- case 16:
- if (fbi->regs.lcdcon5 & S3C2410_LCDCON5_FRM565 ) {
- /* 16 bpp, 565 format */
- var->red.offset = 11;
- var->green.offset = 5;
- var->blue.offset = 0;
- var->red.length = 5;
- var->green.length = 6;
- var->blue.length = 5;
- var->transp.length = 0;
- } else {
- /* 16 bpp, 5551 format */
- var->red.offset = 11;
- var->green.offset = 6;
- var->blue.offset = 1;
- var->red.length = 5;
- var->green.length = 5;
- var->blue.length = 5;
- var->transp.length = 0;
- }
- break;
- case 24:
- /* 24 bpp 888 */
+ } else {
+ var->red.offset = 0;
var->red.length = 8;
- var->red.offset = 16;
- var->green.length = 8;
- var->green.offset = 8;
- var->blue.length = 8;
+ var->green = var->red;
+ var->blue = var->red;
+ }
+ break;
+ case 12:
+ /* 12 bpp 444 */
+ var->red.length = 4;
+ var->red.offset = 8;
+ var->green.length = 4;
+ var->green.offset = 4;
+ var->blue.length = 4;
+ var->blue.offset = 0;
+ break;
+
+ default:
+ case 16:
+ if (fbi->regs.lcdcon5 & S3C2410_LCDCON5_FRM565) {
+ /* 16 bpp, 565 format */
+ var->red.offset = 11;
+ var->green.offset = 5;
var->blue.offset = 0;
- var->transp.length = 0;
- break;
+ var->red.length = 5;
+ var->green.length = 6;
+ var->blue.length = 5;
+ } else {
+ /* 16 bpp, 5551 format */
+ var->red.offset = 11;
+ var->green.offset = 6;
+ var->blue.offset = 1;
+ var->red.length = 5;
+ var->green.length = 5;
+ var->blue.length = 5;
+ }
+ break;
+ case 24:
+ /* 24 bpp 888 */
+ var->red.length = 8;
+ var->red.offset = 16;
+ var->green.length = 8;
+ var->green.offset = 8;
+ var->blue.length = 8;
+ var->blue.offset = 0;
+ break;
}
return 0;
}
-
/* s3c2410fb_activate_var
*
* activate (set) the controller from the given framebuffer
* information
-*/
-
+ */
static void s3c2410fb_activate_var(struct s3c2410fb_info *fbi,
struct fb_var_screeninfo *var)
{
@@ -319,7 +309,8 @@
default:
/* invalid pixel depth */
- dev_err(fbi->dev, "invalid bpp %d\n", var->bits_per_pixel);
+ dev_err(fbi->dev, "invalid bpp %d\n",
+ var->bits_per_pixel);
}
else
switch (var->bits_per_pixel) {
@@ -341,19 +332,18 @@
default:
/* invalid pixel depth */
- dev_err(fbi->dev, "invalid bpp %d\n", var->bits_per_pixel);
+ dev_err(fbi->dev, "invalid bpp %d\n",
+ var->bits_per_pixel);
}
/* check to see if we need to update sync/borders */
if (!fbi->mach_info->fixed_syncs) {
dprintk("setting vert: up=%d, low=%d, sync=%d\n",
- var->upper_margin, var->lower_margin,
- var->vsync_len);
+ var->upper_margin, var->lower_margin, var->vsync_len);
dprintk("setting horz: lft=%d, rt=%d, sync=%d\n",
- var->left_margin, var->right_margin,
- var->hsync_len);
+ var->left_margin, var->right_margin, var->hsync_len);
fbi->regs.lcdcon2 =
S3C2410_LCDCON2_VBPD(var->upper_margin - 1) |
@@ -373,27 +363,24 @@
fbi->regs.lcdcon2 &= ~S3C2410_LCDCON2_LINEVAL(0x3ff);
fbi->regs.lcdcon2 |= S3C2410_LCDCON2_LINEVAL(var->yres - 1);
- switch(fbi->mach_info->type) {
- case S3C2410_LCDCON1_DSCAN4:
- case S3C2410_LCDCON1_STN8:
- hs = var->xres / 8;
- break;
- case S3C2410_LCDCON1_STN4:
- hs = var->xres / 4;
- break;
- default:
- case S3C2410_LCDCON1_TFT:
- hs = var->xres;
- break;
-
+ switch (fbi->mach_info->type) {
+ case S3C2410_LCDCON1_DSCAN4:
+ case S3C2410_LCDCON1_STN8:
+ hs = var->xres / 8;
+ break;
+ case S3C2410_LCDCON1_STN4:
+ hs = var->xres / 4;
+ break;
+ default:
+ case S3C2410_LCDCON1_TFT:
+ hs = var->xres;
+ break;
}
/* Special cases : STN color displays */
- if ( ((fbi->regs.lcdcon1 & S3C2410_LCDCON1_MODEMASK) == S3C2410_LCDCON1_STN8BPP) \
- || ((fbi->regs.lcdcon1 & S3C2410_LCDCON1_MODEMASK) == S3C2410_LCDCON1_STN12BPP) ) {
+ if (((fbi->regs.lcdcon1 & S3C2410_LCDCON1_MODEMASK) == S3C2410_LCDCON1_STN8BPP) ||
+ ((fbi->regs.lcdcon1 & S3C2410_LCDCON1_MODEMASK) == S3C2410_LCDCON1_STN12BPP))
hs = hs * 3;
- }
-
fbi->regs.lcdcon3 &= ~S3C2410_LCDCON3_HOZVAL(0x7ff);
fbi->regs.lcdcon3 |= S3C2410_LCDCON3_HOZVAL(hs - 1);
@@ -402,11 +389,10 @@
int clkdiv = s3c2410fb_calc_pixclk(fbi, var->pixclock);
if (fbi->mach_info->type == S3C2410_LCDCON1_TFT) {
- clkdiv = (clkdiv / 2) -1;
+ clkdiv = (clkdiv / 2) - 1;
if (clkdiv < 0)
clkdiv = 0;
- }
- else {
+ } else {
clkdiv = (clkdiv / 2);
if (clkdiv < 2)
clkdiv = 2;
@@ -437,9 +423,8 @@
writel(fbi->regs.lcdcon1, S3C2410_LCDCON1);
}
-
/*
- * s3c2410fb_set_par - Optional function. Alters the hardware state.
+ * s3c2410fb_set_par - Alters the hardware state.
* @info: frame buffer structure that represents a single frame buffer
*
*/
@@ -448,20 +433,19 @@
struct s3c2410fb_info *fbi = info->par;
struct fb_var_screeninfo *var = &info->var;
- switch (var->bits_per_pixel)
- {
- case 16:
- fbi->fb->fix.visual = FB_VISUAL_TRUECOLOR;
- break;
- case 1:
- fbi->fb->fix.visual = FB_VISUAL_MONO01;
- break;
- default:
- fbi->fb->fix.visual = FB_VISUAL_PSEUDOCOLOR;
- break;
+ switch (var->bits_per_pixel) {
+ case 16:
+ info->fix.visual = FB_VISUAL_TRUECOLOR;
+ break;
+ case 1:
+ info->fix.visual = FB_VISUAL_MONO01;
+ break;
+ default:
+ info->fix.visual = FB_VISUAL_PSEUDOCOLOR;
+ break;
}
- fbi->fb->fix.line_length = (var->width*var->bits_per_pixel)/8;
+ info->fix.line_length = (var->width * var->bits_per_pixel) / 8;
/* activate this new configuration */
@@ -493,7 +477,8 @@
}
/* from pxafb.c */
-static inline unsigned int chan_to_field(unsigned int chan, struct fb_bitfield *bf)
+static inline unsigned int chan_to_field(unsigned int chan,
+ struct fb_bitfield *bf)
{
chan &= 0xffff;
chan >>= 16 - bf->length;
@@ -507,18 +492,19 @@
struct s3c2410fb_info *fbi = info->par;
unsigned int val;
- /* dprintk("setcol: regno=%d, rgb=%d,%d,%d\n", regno, red, green, blue); */
+ /* dprintk("setcol: regno=%d, rgb=%d,%d,%d\n",
+ regno, red, green, blue); */
- switch (fbi->fb->fix.visual) {
+ switch (info->fix.visual) {
case FB_VISUAL_TRUECOLOR:
- /* true-colour, use pseuo-palette */
+ /* true-colour, use pseudo-palette */
if (regno < 16) {
- u32 *pal = fbi->fb->pseudo_palette;
+ u32 *pal = info->pseudo_palette;
- val = chan_to_field(red, &fbi->fb->var.red);
- val |= chan_to_field(green, &fbi->fb->var.green);
- val |= chan_to_field(blue, &fbi->fb->var.blue);
+ val = chan_to_field(red, &info->var.red);
+ val |= chan_to_field(green, &info->var.green);
+ val |= chan_to_field(blue, &info->var.blue);
pal[regno] = val;
}
@@ -539,14 +525,13 @@
break;
default:
- return 1; /* unknown type */
+ return 1; /* unknown type */
}
return 0;
}
-
-/**
+/*
* s3c2410fb_blank
* @blank_mode: the blank mode we want.
* @info: frame buffer structure that represents a single frame buffer
@@ -579,12 +564,14 @@
return 0;
}
-static int s3c2410fb_debug_show(struct device *dev, struct device_attribute *attr, char *buf)
+static int s3c2410fb_debug_show(struct device *dev,
+ struct device_attribute *attr, char *buf)
{
return snprintf(buf, PAGE_SIZE, "%s\n", debug ? "on" : "off");
}
-static int s3c2410fb_debug_store(struct device *dev, struct device_attribute *attr,
- const char *buf, size_t len)
+static int s3c2410fb_debug_store(struct device *dev,
+ struct device_attribute *attr,
+ const char *buf, size_t len)
{
if (mach_info == NULL)
return -EINVAL;
@@ -607,10 +594,7 @@
return len;
}
-
-static DEVICE_ATTR(debug, 0666,
- s3c2410fb_debug_show,
- s3c2410fb_debug_store);
+static DEVICE_ATTR(debug, 0666, s3c2410fb_debug_show, s3c2410fb_debug_store);
static struct fb_ops s3c2410fb_ops = {
.owner = THIS_MODULE,
@@ -623,7 +607,6 @@
.fb_imageblit = cfb_imageblit,
};
-
/*
* s3c2410fb_map_video_memory():
* Allocates the DRAM memory for the frame buffer. This buffer is
@@ -661,7 +644,8 @@
static inline void s3c2410fb_unmap_video_memory(struct s3c2410fb_info *fbi)
{
- dma_free_writecombine(fbi->dev,fbi->map_size,fbi->map_cpu, fbi->map_dma);
+ dma_free_writecombine(fbi->dev, fbi->map_size, fbi->map_cpu,
+ fbi->map_dma);
}
static inline void modify_gpio(void __iomem *reg,
@@ -673,11 +657,9 @@
writel(tmp | set, reg);
}
-
/*
* s3c2410fb_init_registers - Initialise all LCD-related registers
*/
-
static int s3c2410fb_init_registers(struct s3c2410fb_info *fbi)
{
unsigned long flags;
@@ -702,7 +684,7 @@
writel(fbi->regs.lcdcon4, regs + S3C2410_LCDCON4);
writel(fbi->regs.lcdcon5, regs + S3C2410_LCDCON5);
- s3c2410fb_set_lcdaddr(fbi);
+ s3c2410fb_set_lcdaddr(fbi);
dprintk("LPCSEL = 0x%08lx\n", mach_info->lpcsel);
writel(mach_info->lpcsel, regs + S3C2410_LPCSEL);
@@ -721,13 +703,13 @@
static void s3c2410fb_write_palette(struct s3c2410fb_info *fbi)
{
unsigned int i;
- unsigned long ent;
void __iomem *regs = fbi->io;
fbi->palette_ready = 0;
for (i = 0; i < 256; i++) {
- if ((ent = fbi->palette_buffer[i]) == PALETTE_BUFF_CLEAR)
+ unsigned long ent = fbi->palette_buffer[i];
+ if (ent == PALETTE_BUFF_CLEAR)
continue;
writel(ent, regs + S3C2410_TFTPAL(i));
@@ -761,12 +743,12 @@
return IRQ_HANDLED;
}
-static char driver_name[]="s3c2410fb";
+static char driver_name[] = "s3c2410fb";
static int __init s3c2410fb_probe(struct platform_device *pdev)
{
struct s3c2410fb_info *info;
- struct fb_info *fbinfo;
+ struct fb_info *fbinfo;
struct s3c2410fb_hw *mregs;
struct resource *res;
int ret;
@@ -777,7 +759,8 @@
mach_info = pdev->dev.platform_data;
if (mach_info == NULL) {
- dev_err(&pdev->dev,"no platform data for lcd, cannot attach\n");
+ dev_err(&pdev->dev,
+ "no platform data for lcd, cannot attach\n");
return -EINVAL;
}
@@ -790,9 +773,8 @@
}
fbinfo = framebuffer_alloc(sizeof(struct s3c2410fb_info), &pdev->dev);
- if (!fbinfo) {
+ if (!fbinfo)
return -ENOMEM;
- }
info = fbinfo->par;
info->fb = fbinfo;
@@ -800,12 +782,12 @@
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
if (res == NULL) {
- dev_err(&pdev->dev, "failed to get memory registersn");
+ dev_err(&pdev->dev, "failed to get memory registers\n");
ret = -ENXIO;
goto dealloc_fb;
}
- size = (res->end - res->start)+1;
+ size = (res->end - res->start) + 1;
info->mem = request_mem_region(res->start, size, pdev->name);
if (info->mem == NULL) {
dev_err(&pdev->dev, "failed to get memory region\n");
@@ -859,13 +841,19 @@
fbinfo->var.yres_virtual = mach_info->yres.defval;
fbinfo->var.bits_per_pixel = mach_info->bpp.defval;
- fbinfo->var.upper_margin = S3C2410_LCDCON2_GET_VBPD(mregs->lcdcon2) + 1;
- fbinfo->var.lower_margin = S3C2410_LCDCON2_GET_VFPD(mregs->lcdcon2) + 1;
- fbinfo->var.vsync_len = S3C2410_LCDCON2_GET_VSPW(mregs->lcdcon2) + 1;
+ fbinfo->var.upper_margin =
+ S3C2410_LCDCON2_GET_VBPD(mregs->lcdcon2) + 1;
+ fbinfo->var.lower_margin =
+ S3C2410_LCDCON2_GET_VFPD(mregs->lcdcon2) + 1;
+ fbinfo->var.vsync_len =
+ S3C2410_LCDCON2_GET_VSPW(mregs->lcdcon2) + 1;
- fbinfo->var.left_margin = S3C2410_LCDCON3_GET_HFPD(mregs->lcdcon3) + 1;
- fbinfo->var.right_margin = S3C2410_LCDCON3_GET_HBPD(mregs->lcdcon3) + 1;
- fbinfo->var.hsync_len = S3C2410_LCDCON4_GET_HSPW(mregs->lcdcon4) + 1;
+ fbinfo->var.left_margin =
+ S3C2410_LCDCON3_GET_HFPD(mregs->lcdcon3) + 1;
+ fbinfo->var.right_margin =
+ S3C2410_LCDCON3_GET_HBPD(mregs->lcdcon3) + 1;
+ fbinfo->var.hsync_len =
+ S3C2410_LCDCON4_GET_HSPW(mregs->lcdcon4) + 1;
fbinfo->var.red.offset = 11;
fbinfo->var.green.offset = 5;
@@ -875,7 +863,7 @@
fbinfo->var.green.length = 6;
fbinfo->var.blue.length = 5;
fbinfo->var.transp.length = 0;
- fbinfo->fix.smem_len = mach_info->xres.max *
+ fbinfo->fix.smem_len = mach_info->xres.max *
mach_info->yres.max *
mach_info->bpp.max / 8;
@@ -904,20 +892,21 @@
/* Initialize video memory */
ret = s3c2410fb_map_video_memory(info);
if (ret) {
- printk( KERN_ERR "Failed to allocate video RAM: %d\n", ret);
+ printk(KERN_ERR "Failed to allocate video RAM: %d\n", ret);
ret = -ENOMEM;
goto release_clock;
}
dprintk("got video memory\n");
- ret = s3c2410fb_init_registers(info);
+ s3c2410fb_init_registers(info);
- ret = s3c2410fb_check_var(&fbinfo->var, fbinfo);
+ s3c2410fb_check_var(&fbinfo->var, fbinfo);
ret = register_framebuffer(fbinfo);
if (ret < 0) {
- printk(KERN_ERR "Failed to register framebuffer device: %d\n", ret);
+ printk(KERN_ERR "Failed to register framebuffer device: %d\n",
+ ret);
goto free_video_memory;
}
@@ -935,7 +924,7 @@
clk_disable(info->clk);
clk_put(info->clk);
release_irq:
- free_irq(irq,info);
+ free_irq(irq, info);
release_regs:
iounmap(info->io);
release_mem:
@@ -949,8 +938,7 @@
/* s3c2410fb_stop_lcd
*
* shutdown the lcd controller
-*/
-
+ */
static void s3c2410fb_stop_lcd(struct s3c2410fb_info *fbi)
{
unsigned long flags;
@@ -968,7 +956,7 @@
*/
static int s3c2410fb_remove(struct platform_device *pdev)
{
- struct fb_info *fbinfo = platform_get_drvdata(pdev);
+ struct fb_info *fbinfo = platform_get_drvdata(pdev);
struct s3c2410fb_info *info = fbinfo->par;
int irq;
@@ -977,14 +965,14 @@
s3c2410fb_unmap_video_memory(info);
- if (info->clk) {
- clk_disable(info->clk);
- clk_put(info->clk);
- info->clk = NULL;
+ if (info->clk) {
+ clk_disable(info->clk);
+ clk_put(info->clk);
+ info->clk = NULL;
}
irq = platform_get_irq(pdev, 0);
- free_irq(irq,info);
+ free_irq(irq, info);
release_resource(info->mem);
kfree(info->mem);
@@ -997,7 +985,6 @@
#ifdef CONFIG_PM
/* suspend and resume support for the lcd controller */
-
static int s3c2410fb_suspend(struct platform_device *dev, pm_message_t state)
{
struct fb_info *fbinfo = platform_get_drvdata(dev);
@@ -1054,10 +1041,10 @@
platform_driver_unregister(&s3c2410fb_driver);
}
-
module_init(s3c2410fb_init);
module_exit(s3c2410fb_cleanup);
-MODULE_AUTHOR("Arnaud Patard <arnaud.patard@rtp-net.org>, Ben Dooks <ben-linux@fluff.org>");
+MODULE_AUTHOR("Arnaud Patard <arnaud.patard@rtp-net.org>, "
+ "Ben Dooks <ben-linux@fluff.org>");
MODULE_DESCRIPTION("Framebuffer driver for the s3c2410");
MODULE_LICENSE("GPL");
