Lots of changes. Remove volatile keywords. Take the advice in the comments
and change video_slot to slot_addr. Factor out fifteen or so "channel >>
8" shifts into three shifts higher up the call graph. Make
csc_setpalette() atomic, pass the correct color values. Check for
ioremap() failure. Add missing break statement, thus fixing 24 bit console
visual (blue background bug). Remove some uninformative printk() noise.
Add a description for powerbook 140/170 graphics.
Signed-off-by: Finn Thain <fthain@xxxxxxxxxxxxxxxxxxx>
---
drivers/video/macfb.c | 144 ++++++++++++++++++++------------------------------
1 file changed, 60 insertions(+), 84 deletions(-)
Index: linux-2.6.31/drivers/video/macfb.c
===================================================================
--- linux-2.6.31.orig/drivers/video/macfb.c 2009-11-03 03:23:44.000000000 +1100
+++ linux-2.6.31/drivers/video/macfb.c 2009-11-03 03:23:45.000000000 +1100
@@ -120,8 +120,6 @@ struct jet_cmap_regs {
#define PIXEL_TO_MM(a) (((a)*10)/28) /* width in mm at 72 dpi */
-static int video_slot = 0;
-
static struct fb_var_screeninfo macfb_defined = {
.bits_per_pixel = 8,
.activate = FB_ACTIVATE_NOW,
@@ -139,6 +137,7 @@ static struct fb_fix_screeninfo macfb_fi
.accel = FB_ACCEL_NONE,
};
+static void *slot_addr;
static struct fb_info fb_info;
static u32 pseudo_palette[16];
static int inverse;
@@ -156,10 +155,6 @@ static int dafb_setpalette(unsigned int
{
static int lastreg = -1;
unsigned long flags;
-
- red >>= 8;
- green >>= 8;
- blue >>= 8;
local_irq_save(flags);
@@ -205,10 +200,6 @@ static int v8_brazil_setpalette(unsigned
struct fb_info *info)
{
unsigned int bpp = info->var.bits_per_pixel;
- unsigned char _red =red>>8;
- unsigned char _green=green>>8;
- unsigned char _blue =blue>>8;
- unsigned char _regno;
unsigned long flags;
if (bpp > 8)
@@ -222,16 +213,16 @@ static int v8_brazil_setpalette(unsigned
* In 4bpp, the regnos are 0x0f, 0x1f, 0x2f, etc, etc
* In 2bpp, the regnos are 0x3f, 0x7f, 0xbf, 0xff
*/
- _regno = (regno << (8 - bpp)) | (0xFF >> bpp);
- nubus_writeb(_regno, &v8_brazil_cmap_regs->addr);
+ regno = (regno << (8 - bpp)) | (0xFF >> bpp);
+ nubus_writeb(regno, &v8_brazil_cmap_regs->addr);
nop();
/* send one color channel at a time */
- nubus_writeb(_red, &v8_brazil_cmap_regs->lut);
+ nubus_writeb(red, &v8_brazil_cmap_regs->lut);
nop();
- nubus_writeb(_green, &v8_brazil_cmap_regs->lut);
+ nubus_writeb(green, &v8_brazil_cmap_regs->lut);
nop();
- nubus_writeb(_blue, &v8_brazil_cmap_regs->lut);
+ nubus_writeb(blue, &v8_brazil_cmap_regs->lut);
local_irq_restore(flags);
return 0;
@@ -241,11 +232,6 @@ static int rbv_setpalette(unsigned int r
unsigned int green, unsigned int blue,
struct fb_info *info)
{
- /* use MSBs */
- unsigned char _red =red>>8;
- unsigned char _green=green>>8;
- unsigned char _blue =blue>>8;
- unsigned char _regno;
unsigned long flags;
if (info->var.bits_per_pixel > 8)
@@ -257,22 +243,22 @@ static int rbv_setpalette(unsigned int r
* regno #254 and #255 are the important ones for 1-bit color,
* regno #252-255 are the important ones for 2-bit color, etc.
*/
- _regno = regno + (256-(1 << info->var.bits_per_pixel));
+ regno += 256 - (1 << info->var.bits_per_pixel);
/* reset clut? (VideoToolbox sez "not necessary") */
nubus_writeb(0xFF, &rbv_cmap_regs->cntl);
nop();
/* tell clut which address to use. */
- nubus_writeb(_regno, &rbv_cmap_regs->addr);
+ nubus_writeb(regno, &rbv_cmap_regs->addr);
nop();
/* send one color channel at a time. */
- nubus_writeb(_red, &rbv_cmap_regs->lut);
+ nubus_writeb(red, &rbv_cmap_regs->lut);
nop();
- nubus_writeb(_green, &rbv_cmap_regs->lut);
+ nubus_writeb(green, &rbv_cmap_regs->lut);
nop();
- nubus_writeb(_blue, &rbv_cmap_regs->lut);
+ nubus_writeb(blue, &rbv_cmap_regs->lut);
local_irq_restore(flags);
return 0;
@@ -283,25 +269,19 @@ static int mdc_setpalette(unsigned int r
unsigned int green, unsigned int blue,
struct fb_info *info)
{
- volatile struct mdc_cmap_regs *cmap_regs =
- nubus_slot_addr(video_slot);
- /* use MSBs */
- unsigned char _red =red>>8;
- unsigned char _green=green>>8;
- unsigned char _blue =blue>>8;
- unsigned char _regno=regno;
+ struct mdc_cmap_regs *cmap_regs = slot_addr;
unsigned long flags;
local_irq_save(flags);
/* the nop's are there to order writes. */
- nubus_writeb(_regno, &cmap_regs->addr);
+ nubus_writeb(regno, &cmap_regs->addr);
nop();
- nubus_writeb(_red, &cmap_regs->lut);
+ nubus_writeb(red, &cmap_regs->lut);
nop();
- nubus_writeb(_green, &cmap_regs->lut);
+ nubus_writeb(green, &cmap_regs->lut);
nop();
- nubus_writeb(_blue, &cmap_regs->lut);
+ nubus_writeb(blue, &cmap_regs->lut);
local_irq_restore(flags);
return 0;
@@ -312,25 +292,24 @@ static int toby_setpalette(unsigned int
unsigned int green, unsigned int blue,
struct fb_info *info)
{
- volatile struct toby_cmap_regs *cmap_regs =
- nubus_slot_addr(video_slot);
+ struct toby_cmap_regs *cmap_regs = slot_addr;
unsigned int bpp = info->var.bits_per_pixel;
- /* use MSBs */
- unsigned char _red =~(red>>8);
- unsigned char _green=~(green>>8);
- unsigned char _blue =~(blue>>8);
- unsigned char _regno = (regno << (8 - bpp)) | (0xFF >> bpp);
unsigned long flags;
+ red = ~red;
+ green = ~green;
+ blue = ~blue;
+ regno = (regno << (8 - bpp)) | (0xFF >> bpp);
+
local_irq_save(flags);
- nubus_writeb(_regno, &cmap_regs->addr);
+ nubus_writeb(regno, &cmap_regs->addr);
nop();
- nubus_writeb(_red, &cmap_regs->lut);
+ nubus_writeb(red, &cmap_regs->lut);
nop();
- nubus_writeb(_green, &cmap_regs->lut);
+ nubus_writeb(green, &cmap_regs->lut);
nop();
- nubus_writeb(_blue, &cmap_regs->lut);
+ nubus_writeb(blue, &cmap_regs->lut);
local_irq_restore(flags);
return 0;
@@ -341,23 +320,18 @@ static int jet_setpalette(unsigned int r
unsigned int green, unsigned int blue,
struct fb_info *info)
{
- volatile struct jet_cmap_regs *cmap_regs =
- nubus_slot_addr(video_slot);
- /* use MSBs */
- unsigned char _red = (red>>8);
- unsigned char _green = (green>>8);
- unsigned char _blue = (blue>>8);
+ struct jet_cmap_regs *cmap_regs = slot_addr;
unsigned long flags;
local_irq_save(flags);
nubus_writeb(regno, &cmap_regs->addr);
nop();
- nubus_writeb(_red, &cmap_regs->lut);
+ nubus_writeb(red, &cmap_regs->lut);
nop();
- nubus_writeb(_green, &cmap_regs->lut);
+ nubus_writeb(green, &cmap_regs->lut);
nop();
- nubus_writeb(_blue, &cmap_regs->lut);
+ nubus_writeb(blue, &cmap_regs->lut);
local_irq_restore(flags);
return 0;
@@ -384,10 +358,6 @@ static int civic_setpalette(unsigned int
if (info->var.bits_per_pixel > 8)
return 1; /* failsafe */
- red >>= 8;
- green >>= 8;
- blue >>= 8;
-
local_irq_save(flags);
/* Set the register address */
@@ -463,11 +433,17 @@ static int csc_setpalette(unsigned int r
unsigned int green, unsigned int blue,
struct fb_info *info)
{
- mdelay(1);
+ unsigned long flags;
+
+ local_irq_save(flags);
+
+ udelay(1); /* mklinux on PB 5300 waits for 260 ns */
nubus_writeb(regno, &csc_cmap_regs->clut_waddr);
- nubus_writeb(red, &csc_cmap_regs->clut_data);
+ nubus_writeb(red, &csc_cmap_regs->clut_data);
nubus_writeb(green, &csc_cmap_regs->clut_data);
- nubus_writeb(blue, &csc_cmap_regs->clut_data);
+ nubus_writeb(blue, &csc_cmap_regs->clut_data);
+
+ local_irq_restore(flags);
return 0;
}
@@ -494,8 +470,8 @@ static int macfb_setcolreg(unsigned regn
case 4:
case 8:
if (macfb_setpalette)
- macfb_setpalette(regno, red, green, blue,
- fb_info);
+ macfb_setpalette(regno, red >> 8, green >> 8,
+ blue >> 8, fb_info);
else
return 1;
break;
@@ -612,8 +588,11 @@ static int __init macfb_init(void)
* those mappings are set up, so this is in fact the safest
* way to ensure that this driver will work on every possible Mac
*/
- fb_info.screen_base = ioremap(mac_bi_data.videoaddr, macfb_fix.smem_len);
-
+ fb_info.screen_base = ioremap(mac_bi_data.videoaddr,
+ macfb_fix.smem_len);
+ if (!fb_info.screen_base)
+ return -ENODEV;
+
printk("macfb: framebuffer at 0x%08lx, mapped to 0x%p, size %dk\n",
macfb_fix.smem_start, fb_info.screen_base,
macfb_fix.smem_len / 1024);
@@ -621,17 +600,13 @@ static int __init macfb_init(void)
macfb_defined.xres, macfb_defined.yres,
macfb_defined.bits_per_pixel, macfb_fix.line_length);
- /*
- * Fill in the available video resolution
- */
+ /* Fill in the available video resolution */
macfb_defined.xres_virtual = macfb_defined.xres;
macfb_defined.yres_virtual = macfb_defined.yres;
macfb_defined.height = PIXEL_TO_MM(macfb_defined.yres);
macfb_defined.width = PIXEL_TO_MM(macfb_defined.xres);
- printk("macfb: scrolling: redraw\n");
-
- /* some dummy values for timing to make fbset happy */
+ /* Some dummy values for timing to make fbset happy */
macfb_defined.pixclock = 10000000 / macfb_defined.xres *
1000 / macfb_defined.yres;
macfb_defined.left_margin = (macfb_defined.xres / 8) & 0xf8;
@@ -667,8 +642,6 @@ static int __init macfb_init(void)
macfb_defined.green.length = 5;
macfb_defined.blue.offset = 0;
macfb_defined.blue.length = 5;
- printk("macfb: directcolor: "
- "size=1:5:5:5, shift=15:10:5:0\n");
video_cmap_len = 16;
/*
* Should actually be FB_VISUAL_DIRECTCOLOR, but this
@@ -684,10 +657,9 @@ static int __init macfb_init(void)
macfb_defined.green.length = 8;
macfb_defined.blue.offset = 0;
macfb_defined.blue.length = 8;
- printk("macfb: truecolor: "
- "size=0:8:8:8, shift=0:16:8:0\n");
video_cmap_len = 16;
macfb_fix.visual = FB_VISUAL_TRUECOLOR;
+ break;
default:
video_cmap_len = 0;
macfb_fix.visual = FB_VISUAL_MONO01;
@@ -705,16 +677,17 @@ static int __init macfb_init(void)
* code is really broken :-)
*/
- while ((ndev = nubus_find_type(NUBUS_CAT_DISPLAY, NUBUS_TYPE_VIDEO, ndev))
- != NULL)
+ while ((ndev = nubus_find_type(NUBUS_CAT_DISPLAY,
+ NUBUS_TYPE_VIDEO, ndev)))
{
- if (!(mac_bi_data.videoaddr >= ndev->board->slot_addr
- && (mac_bi_data.videoaddr <
- (unsigned long)nubus_slot_addr(ndev->board->slot+1))))
+ unsigned long base = ndev->board->slot_addr;
+
+ if (mac_bi_data.videoaddr < base ||
+ mac_bi_data.videoaddr - base > 0xFFFFFF)
continue;
+
video_is_nubus = 1;
- /* We should probably just use the slot address... */
- video_slot = ndev->board->slot;
+ slot_addr = (unsigned char *)base;
switch(ndev->dr_hw) {
case NUBUS_DRHW_APPLE_MDC:
@@ -883,6 +856,9 @@ static int __init macfb_init(void)
* really support that.
*/
+ /*
+ * Slot 0 ROM says TIM. No external video. B&W.
+ */
case MAC_MODEL_PB140:
case MAC_MODEL_PB145:
case MAC_MODEL_PB170:
--
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