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fbdev: Teaches offb about palette on radeon r5xx/r6xx
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The offb driver already has a collection of hacks to be able to set
the palette on various chips. This adds support for r5xx/r6xx radeons.

This is needed as offb is the only console solution on these currently
and the firmware in some cases sets a really bad color palette. This
fixes using some Radeon X16xx on the Powerstation for example.

Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
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Benjamin Herrenschmidt committed Jul 22, 2008
1 parent c134fd8 commit 57a20d8
Showing 1 changed file with 142 additions and 50 deletions.
192 changes: 142 additions & 50 deletions drivers/video/offb.c
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Original file line number Diff line number Diff line change
Expand Up @@ -47,6 +47,7 @@ enum {
cmap_M3B, /* ATI Rage Mobility M3 Head B */
cmap_radeon, /* ATI Radeon */
cmap_gxt2000, /* IBM GXT2000 */
cmap_avivo, /* ATI R5xx */
};

struct offb_par {
Expand All @@ -58,26 +59,36 @@ struct offb_par {

struct offb_par default_par;

/*
* Interface used by the world
*/

static int offb_setcolreg(u_int regno, u_int red, u_int green, u_int blue,
u_int transp, struct fb_info *info);
static int offb_blank(int blank, struct fb_info *info);

#ifdef CONFIG_PPC32
extern boot_infos_t *boot_infos;
#endif

static struct fb_ops offb_ops = {
.owner = THIS_MODULE,
.fb_setcolreg = offb_setcolreg,
.fb_blank = offb_blank,
.fb_fillrect = cfb_fillrect,
.fb_copyarea = cfb_copyarea,
.fb_imageblit = cfb_imageblit,
};
/* Definitions used by the Avivo palette hack */
#define AVIVO_DC_LUT_RW_SELECT 0x6480
#define AVIVO_DC_LUT_RW_MODE 0x6484
#define AVIVO_DC_LUT_RW_INDEX 0x6488
#define AVIVO_DC_LUT_SEQ_COLOR 0x648c
#define AVIVO_DC_LUT_PWL_DATA 0x6490
#define AVIVO_DC_LUT_30_COLOR 0x6494
#define AVIVO_DC_LUT_READ_PIPE_SELECT 0x6498
#define AVIVO_DC_LUT_WRITE_EN_MASK 0x649c
#define AVIVO_DC_LUT_AUTOFILL 0x64a0

#define AVIVO_DC_LUTA_CONTROL 0x64c0
#define AVIVO_DC_LUTA_BLACK_OFFSET_BLUE 0x64c4
#define AVIVO_DC_LUTA_BLACK_OFFSET_GREEN 0x64c8
#define AVIVO_DC_LUTA_BLACK_OFFSET_RED 0x64cc
#define AVIVO_DC_LUTA_WHITE_OFFSET_BLUE 0x64d0
#define AVIVO_DC_LUTA_WHITE_OFFSET_GREEN 0x64d4
#define AVIVO_DC_LUTA_WHITE_OFFSET_RED 0x64d8

#define AVIVO_DC_LUTB_CONTROL 0x6cc0
#define AVIVO_DC_LUTB_BLACK_OFFSET_BLUE 0x6cc4
#define AVIVO_DC_LUTB_BLACK_OFFSET_GREEN 0x6cc8
#define AVIVO_DC_LUTB_BLACK_OFFSET_RED 0x6ccc
#define AVIVO_DC_LUTB_WHITE_OFFSET_BLUE 0x6cd0
#define AVIVO_DC_LUTB_WHITE_OFFSET_GREEN 0x6cd4
#define AVIVO_DC_LUTB_WHITE_OFFSET_RED 0x6cd8

/*
* Set a single color register. The values supplied are already
Expand Down Expand Up @@ -160,6 +171,17 @@ static int offb_setcolreg(u_int regno, u_int red, u_int green, u_int blue,
out_le32(((unsigned __iomem *) par->cmap_adr) + regno,
(red << 16 | green << 8 | blue));
break;
case cmap_avivo:
/* Write to both LUTs for now */
writel(1, par->cmap_adr + AVIVO_DC_LUT_RW_SELECT);
writeb(regno, par->cmap_adr + AVIVO_DC_LUT_RW_INDEX);
writel(((red) << 22) | ((green) << 12) | ((blue) << 2),
par->cmap_adr + AVIVO_DC_LUT_30_COLOR);
writel(0, par->cmap_adr + AVIVO_DC_LUT_RW_SELECT);
writeb(regno, par->cmap_adr + AVIVO_DC_LUT_RW_INDEX);
writel(((red) << 22) | ((green) << 12) | ((blue) << 2),
par->cmap_adr + AVIVO_DC_LUT_30_COLOR);
break;
}

return 0;
Expand Down Expand Up @@ -216,12 +238,59 @@ static int offb_blank(int blank, struct fb_info *info)
out_le32(((unsigned __iomem *) par->cmap_adr) + i,
0);
break;
case cmap_avivo:
writel(1, par->cmap_adr + AVIVO_DC_LUT_RW_SELECT);
writeb(i, par->cmap_adr + AVIVO_DC_LUT_RW_INDEX);
writel(0, par->cmap_adr + AVIVO_DC_LUT_30_COLOR);
writel(0, par->cmap_adr + AVIVO_DC_LUT_RW_SELECT);
writeb(i, par->cmap_adr + AVIVO_DC_LUT_RW_INDEX);
writel(0, par->cmap_adr + AVIVO_DC_LUT_30_COLOR);
break;
}
} else
fb_set_cmap(&info->cmap, info);
return 0;
}

static int offb_set_par(struct fb_info *info)
{
struct offb_par *par = (struct offb_par *) info->par;

/* On avivo, initialize palette control */
if (par->cmap_type == cmap_avivo) {
writel(0, par->cmap_adr + AVIVO_DC_LUTA_CONTROL);
writel(0, par->cmap_adr + AVIVO_DC_LUTA_BLACK_OFFSET_BLUE);
writel(0, par->cmap_adr + AVIVO_DC_LUTA_BLACK_OFFSET_GREEN);
writel(0, par->cmap_adr + AVIVO_DC_LUTA_BLACK_OFFSET_RED);
writel(0x0000ffff, par->cmap_adr + AVIVO_DC_LUTA_WHITE_OFFSET_BLUE);
writel(0x0000ffff, par->cmap_adr + AVIVO_DC_LUTA_WHITE_OFFSET_GREEN);
writel(0x0000ffff, par->cmap_adr + AVIVO_DC_LUTA_WHITE_OFFSET_RED);
writel(0, par->cmap_adr + AVIVO_DC_LUTB_CONTROL);
writel(0, par->cmap_adr + AVIVO_DC_LUTB_BLACK_OFFSET_BLUE);
writel(0, par->cmap_adr + AVIVO_DC_LUTB_BLACK_OFFSET_GREEN);
writel(0, par->cmap_adr + AVIVO_DC_LUTB_BLACK_OFFSET_RED);
writel(0x0000ffff, par->cmap_adr + AVIVO_DC_LUTB_WHITE_OFFSET_BLUE);
writel(0x0000ffff, par->cmap_adr + AVIVO_DC_LUTB_WHITE_OFFSET_GREEN);
writel(0x0000ffff, par->cmap_adr + AVIVO_DC_LUTB_WHITE_OFFSET_RED);
writel(1, par->cmap_adr + AVIVO_DC_LUT_RW_SELECT);
writel(0, par->cmap_adr + AVIVO_DC_LUT_RW_MODE);
writel(0x0000003f, par->cmap_adr + AVIVO_DC_LUT_WRITE_EN_MASK);
writel(0, par->cmap_adr + AVIVO_DC_LUT_RW_SELECT);
writel(0, par->cmap_adr + AVIVO_DC_LUT_RW_MODE);
writel(0x0000003f, par->cmap_adr + AVIVO_DC_LUT_WRITE_EN_MASK);
}
return 0;
}

static struct fb_ops offb_ops = {
.owner = THIS_MODULE,
.fb_setcolreg = offb_setcolreg,
.fb_set_par = offb_set_par,
.fb_blank = offb_blank,
.fb_fillrect = cfb_fillrect,
.fb_copyarea = cfb_copyarea,
.fb_imageblit = cfb_imageblit,
};

static void __iomem *offb_map_reg(struct device_node *np, int index,
unsigned long offset, unsigned long size)
Expand All @@ -245,6 +314,59 @@ static void __iomem *offb_map_reg(struct device_node *np, int index,
return ioremap(taddr + offset, size);
}

static void offb_init_palette_hacks(struct fb_info *info, struct device_node *dp,
const char *name, unsigned long address)
{
struct offb_par *par = (struct offb_par *) info->par;

if (dp && !strncmp(name, "ATY,Rage128", 11)) {
par->cmap_adr = offb_map_reg(dp, 2, 0, 0x1fff);
if (par->cmap_adr)
par->cmap_type = cmap_r128;
} else if (dp && (!strncmp(name, "ATY,RageM3pA", 12)
|| !strncmp(name, "ATY,RageM3p12A", 14))) {
par->cmap_adr = offb_map_reg(dp, 2, 0, 0x1fff);
if (par->cmap_adr)
par->cmap_type = cmap_M3A;
} else if (dp && !strncmp(name, "ATY,RageM3pB", 12)) {
par->cmap_adr = offb_map_reg(dp, 2, 0, 0x1fff);
if (par->cmap_adr)
par->cmap_type = cmap_M3B;
} else if (dp && !strncmp(name, "ATY,Rage6", 9)) {
par->cmap_adr = offb_map_reg(dp, 1, 0, 0x1fff);
if (par->cmap_adr)
par->cmap_type = cmap_radeon;
} else if (!strncmp(name, "ATY,", 4)) {
unsigned long base = address & 0xff000000UL;
par->cmap_adr =
ioremap(base + 0x7ff000, 0x1000) + 0xcc0;
par->cmap_data = par->cmap_adr + 1;
par->cmap_type = cmap_m64;
} else if (dp && (of_device_is_compatible(dp, "pci1014,b7") ||
of_device_is_compatible(dp, "pci1014,21c"))) {
par->cmap_adr = offb_map_reg(dp, 0, 0x6000, 0x1000);
if (par->cmap_adr)
par->cmap_type = cmap_gxt2000;
} else if (dp && !strncmp(name, "vga,Display-", 12)) {
/* Look for AVIVO initialized by SLOF */
struct device_node *pciparent = of_get_parent(dp);
const u32 *vid, *did;
vid = of_get_property(pciparent, "vendor-id", NULL);
did = of_get_property(pciparent, "device-id", NULL);
/* This will match most R5xx */
if (vid && did && *vid == 0x1002 &&
((*did >= 0x7100 && *did < 0x7800) ||
(*did >= 0x9400))) {
par->cmap_adr = offb_map_reg(pciparent, 2, 0, 0x10000);
if (par->cmap_adr)
par->cmap_type = cmap_avivo;
}
of_node_put(pciparent);
}
info->fix.visual = (par->cmap_type != cmap_unknown) ?
FB_VISUAL_PSEUDOCOLOR : FB_VISUAL_STATIC_PSEUDOCOLOR;
}

static void __init offb_init_fb(const char *name, const char *full_name,
int width, int height, int depth,
int pitch, unsigned long address,
Expand Down Expand Up @@ -283,6 +405,7 @@ static void __init offb_init_fb(const char *name, const char *full_name,

fix = &info->fix;
var = &info->var;
info->par = par;

strcpy(fix->id, "OFfb ");
strncat(fix->id, name, sizeof(fix->id) - sizeof("OFfb "));
Expand All @@ -298,39 +421,9 @@ static void __init offb_init_fb(const char *name, const char *full_name,
fix->type_aux = 0;

par->cmap_type = cmap_unknown;
if (depth == 8) {
if (dp && !strncmp(name, "ATY,Rage128", 11)) {
par->cmap_adr = offb_map_reg(dp, 2, 0, 0x1fff);
if (par->cmap_adr)
par->cmap_type = cmap_r128;
} else if (dp && (!strncmp(name, "ATY,RageM3pA", 12)
|| !strncmp(name, "ATY,RageM3p12A", 14))) {
par->cmap_adr = offb_map_reg(dp, 2, 0, 0x1fff);
if (par->cmap_adr)
par->cmap_type = cmap_M3A;
} else if (dp && !strncmp(name, "ATY,RageM3pB", 12)) {
par->cmap_adr = offb_map_reg(dp, 2, 0, 0x1fff);
if (par->cmap_adr)
par->cmap_type = cmap_M3B;
} else if (dp && !strncmp(name, "ATY,Rage6", 9)) {
par->cmap_adr = offb_map_reg(dp, 1, 0, 0x1fff);
if (par->cmap_adr)
par->cmap_type = cmap_radeon;
} else if (!strncmp(name, "ATY,", 4)) {
unsigned long base = address & 0xff000000UL;
par->cmap_adr =
ioremap(base + 0x7ff000, 0x1000) + 0xcc0;
par->cmap_data = par->cmap_adr + 1;
par->cmap_type = cmap_m64;
} else if (dp && (of_device_is_compatible(dp, "pci1014,b7") ||
of_device_is_compatible(dp, "pci1014,21c"))) {
par->cmap_adr = offb_map_reg(dp, 0, 0x6000, 0x1000);
if (par->cmap_adr)
par->cmap_type = cmap_gxt2000;
}
fix->visual = (par->cmap_type != cmap_unknown) ?
FB_VISUAL_PSEUDOCOLOR : FB_VISUAL_STATIC_PSEUDOCOLOR;
} else
if (depth == 8)
offb_init_palette_hacks(info, dp, name, address);
else
fix->visual = FB_VISUAL_TRUECOLOR;

var->xoffset = var->yoffset = 0;
Expand Down Expand Up @@ -395,7 +488,6 @@ static void __init offb_init_fb(const char *name, const char *full_name,

info->fbops = &offb_ops;
info->screen_base = ioremap(address, fix->smem_len);
info->par = par;
info->pseudo_palette = (void *) (info + 1);
info->flags = FBINFO_DEFAULT | foreign_endian;

Expand Down

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