* Patch to cyberfb.c to drive Aurora 64 V+ (fwd)
@ 2003-07-04 14:25 Geert Uytterhoeven
2003-07-04 14:43 ` Jeff Garzik
0 siblings, 1 reply; 2+ messages in thread
From: Geert Uytterhoeven @ 2003-07-04 14:25 UTC (permalink / raw)
To: Linux Frame Buffer Device Development
[-- Attachment #1: Type: TEXT/PLAIN, Size: 1404 bytes --]
---------- Forwarded message ----------
Date: Wed, 2 Jul 2003 15:57:15 -0400 (EDT)
From: Brent Baccala <baccala@vger.freesoft.org>
To: linux-kernel@vger.kernel.org
Cc: hartwinleen@gmx.net
Subject: Patch to cyberfb.c to drive Aurora 64 V+
Hi -
I'm attaching a patch to 2.4.20's drivers/video/cyberfb.c to drive the
S3 Aurora 64 V+ chip
cyberfb.c is a fairly generic S3 driver, so half of this patch is
byte-ordering and probing on the PCI bus as well as the Zorro bus.
Unfortunately, the machine I was developing this on died, and the
patch really isn't finished yet. It works, but it has some problems
(if you try to start a 16-color X server, you'll see; 256-color works
fine, though, full color had some kind of problem, I recall). It
also has some "#if 0"s that really should be better conditionals.
But, the machine is dead, and barring a resurrection, I won't be
doing any more work on this code. It's a good starting point for
anyone try to get an S3 Aurora V+ running with the kernel framebuffer
code, and, I dare say, anyone with another kind of S3 or S3-compatible
card should find it a good start.
Sorry about the half-finished code, but "release early, release often",
so maybe somebody else can get some good from it.
--
-bwb
Brent Baccala
baccala@freesoft.org
[-- Attachment #2: Type: TEXT/PLAIN, Size: 16866 bytes --]
patch to cyberfb.c to handle S3 Aurora 64 V+ (used in Thinkpad 860)
cyberfb.c is a fairly generic S3 fbcon driver
half of this patch is byte ordering and PCI bus probing
still doesn't work completely right - XF86_VGA16 on fbcon breaks it
--- /powerpc/dist-2.4.20/drivers/video/Config.in Sun Apr 20 12:04:35 2003
+++ /powerpc/linux-2.4.20/drivers/video/Config.in Mon Apr 21 09:12:53 2003
@@ -51,8 +51,8 @@
bool ' Amiga AGA chipset support' CONFIG_FB_AMIGA_AGA
fi
fi
+ tristate ' S3 Trio (Amiga CyberVision) support' CONFIG_FB_CYBER
if [ "$CONFIG_ZORRO" = "y" ]; then
- tristate ' Amiga CyberVision support' CONFIG_FB_CYBER
if [ "$CONFIG_EXPERIMENTAL" = "y" ]; then
bool ' Amiga CyberVision3D support (EXPERIMENTAL)' CONFIG_FB_VIRGE
tristate ' Amiga RetinaZ3 support (EXPERIMENTAL)' CONFIG_FB_RETINAZ3
--- /powerpc/dist-2.4.20/drivers/video/cyberfb.c Wed Nov 14 17:52:20 2001
+++ /powerpc/linux-2.4.20/drivers/video/cyberfb.c Tue Apr 15 18:35:07 2003
@@ -85,6 +85,7 @@
#include <linux/slab.h>
#include <linux/delay.h>
#include <linux/zorro.h>
+#include <linux/pci.h>
#include <linux/fb.h>
#include <linux/init.h>
#include <asm/uaccess.h>
@@ -99,7 +100,7 @@
#include <video/fbcon-cfb8.h>
#include <video/fbcon-cfb16.h>
-/*#define CYBERFBDEBUG*/
+/* #define CYBERFBDEBUG */
#ifdef CYBERFBDEBUG
#define DPRINTK(fmt, args...) printk(KERN_DEBUG "%s: " fmt, __FUNCTION__ , ## args)
static void cv64_dump(void);
@@ -110,7 +111,26 @@
#define wb_64(regs,reg,dat) (*(((volatile unsigned char *)regs) + reg) = dat)
#define rb_64(regs, reg) (*(((volatile unsigned char *)regs) + reg))
-#define ww_64(regs,reg,dat) (*((volatile unsigned short *)(regs + reg) = dat)
+#if 0
+
+#define ww_64(regs,reg,dat) (*((volatile unsigned short *)(regs + reg)) = dat)
+#define rw_64(regs,reg) (*((volatile unsigned short *)(regs + reg)))
+
+#define wl_64(regs,reg,dat) (*((volatile unsigned long *)(regs + reg)) = dat)
+#define rl_64(regs,reg) (*((volatile unsigned long *)(regs + reg)))
+
+#else
+
+#define ww_64(regs,reg,dat) st_le16((volatile unsigned short *)(regs + reg), dat)
+#define rw_64(regs,reg) ld_le16((volatile unsigned short *)(regs + reg))
+
+#define wl_64(regs,reg,dat) st_le32((volatile unsigned *)(regs + reg), dat)
+#define rl_64(regs,reg) ld_le32((volatile unsigned *)(regs + reg))
+
+#endif
+
+/* Write 16 Bit VGA register */
+#define vgaw16(ba, reg, val) ww_64(ba, reg, val)
struct cyberfb_par {
struct fb_var_screeninfo var;
@@ -148,6 +168,10 @@
static unsigned long CyberMem_phys;
static unsigned long CyberRegs_phys;
+static int disabled = 0;
+
+#define AURORA (CyberBase == NULL)
+
/*
* Predefined Video Modes
*/
@@ -438,6 +462,8 @@
par->var.yres_virtual = var->yres_virtual;
par->var.xoffset = var->xoffset;
par->var.yoffset = var->yoffset;
+ if (var->bits_per_pixel != 8 && var->bits_per_pixel != 16)
+ return -EINVAL;
par->var.bits_per_pixel = var->bits_per_pixel;
par->var.grayscale = var->grayscale;
par->var.red = var->red;
@@ -621,7 +647,7 @@
DPRINTK("ENTER\n");
do {
- status = *((u_short volatile *)(CyberRegs + S3_GP_STAT));
+ status = rw_64(CyberRegs, S3_GP_STAT);
} while (status & fifo);
DPRINTK("EXIT\n");
}
@@ -635,7 +661,7 @@
DPRINTK("ENTER\n");
do {
- status = *((u_short volatile *)(CyberRegs + S3_GP_STAT));
+ status = rw_64(CyberRegs, S3_GP_STAT);
} while (status & S3_HDW_BUSY);
DPRINTK("EXIT\n");
}
@@ -669,19 +695,19 @@
Cyber_WaitQueue (0x8000);
- *((u_short volatile *)(regs + S3_PIXEL_CNTL)) = 0xa000;
- *((u_short volatile *)(regs + S3_FRGD_MIX)) = (0x0060 | mode);
+ ww_64(regs, S3_PIXEL_CNTL, 0xa000);
+ ww_64(regs, S3_FRGD_MIX, (0x0060 | mode));
- *((u_short volatile *)(regs + S3_CUR_X)) = curx;
- *((u_short volatile *)(regs + S3_CUR_Y)) = cury;
+ ww_64(regs, S3_CUR_X, curx);
+ ww_64(regs, S3_CUR_Y, cury);
- *((u_short volatile *)(regs + S3_DESTX_DIASTP)) = destx;
- *((u_short volatile *)(regs + S3_DESTY_AXSTP)) = desty;
+ ww_64(regs, S3_DESTX_DIASTP, destx);
+ ww_64(regs, S3_DESTY_AXSTP, desty);
- *((u_short volatile *)(regs + S3_MIN_AXIS_PCNT)) = height - 1;
- *((u_short volatile *)(regs + S3_MAJ_AXIS_PCNT)) = width - 1;
+ ww_64(regs, S3_MIN_AXIS_PCNT, height - 1);
+ ww_64(regs, S3_MAJ_AXIS_PCNT, width - 1);
- *((u_short volatile *)(regs + S3_CMD)) = blitcmd;
+ ww_64(regs, S3_CMD, blitcmd);
DPRINTK("EXIT\n");
}
@@ -697,19 +723,19 @@
DPRINTK("ENTER\n");
Cyber_WaitQueue (0x8000);
- *((u_short volatile *)(regs + S3_PIXEL_CNTL)) = 0xa000;
- *((u_short volatile *)(regs + S3_FRGD_MIX)) = (0x0020 | mode);
+ ww_64(regs, S3_PIXEL_CNTL, 0xa000);
+ ww_64(regs, S3_FRGD_MIX, (0x0020 | mode));
- *((u_short volatile *)(regs + S3_MULT_MISC)) = 0xe000;
- *((u_short volatile *)(regs + S3_FRGD_COLOR)) = color;
+ ww_64(regs, S3_MULT_MISC, 0xe000);
+ ww_64(regs, S3_FRGD_COLOR, color);
- *((u_short volatile *)(regs + S3_CUR_X)) = x;
- *((u_short volatile *)(regs + S3_CUR_Y)) = y;
+ ww_64(regs, S3_CUR_X, x);
+ ww_64(regs, S3_CUR_Y, y);
- *((u_short volatile *)(regs + S3_MIN_AXIS_PCNT)) = height - 1;
- *((u_short volatile *)(regs + S3_MAJ_AXIS_PCNT)) = width - 1;
+ ww_64(regs, S3_MIN_AXIS_PCNT, height - 1);
+ ww_64(regs, S3_MAJ_AXIS_PCNT, width - 1);
- *((u_short volatile *)(regs + S3_CMD)) = blitcmd;
+ ww_64(regs, S3_CMD, blitcmd);
DPRINTK("EXIT\n");
}
@@ -1051,7 +1077,57 @@
* Initialization
*/
-int __init cyberfb_init(void)
+int __init cyberfb_init_device(void)
+{
+ struct cyberfb_par par;
+ DPRINTK("ENTER\n");
+
+ DPRINTK("CyberBase=%08lx CyberRegs=%08lx CyberMem=%08lx\n",
+ CyberBase, (long unsigned int)CyberRegs, CyberMem);
+
+#ifdef CYBERFBDEBUG
+ DPRINTK("Register state just after mapping memory\n");
+ cv64_dump();
+#endif
+
+ strcpy(fb_info.modename, cyberfb_name);
+ fb_info.changevar = NULL;
+ fb_info.node = -1;
+ fb_info.fbops = &cyberfb_ops;
+ fb_info.disp = &disp;
+ fb_info.switch_con = &Cyberfb_switch;
+ fb_info.updatevar = &Cyberfb_updatevar;
+ fb_info.blank = &Cyberfb_blank;
+
+ Cyber_init();
+ /* ++Andre: set cyberfb default mode */
+ if (!cyberfb_usermode) {
+ cyberfb_default = cyberfb_predefined[CYBER8_DEFMODE].var;
+ DPRINTK("Use default cyber8 mode\n");
+ }
+ Cyber_decode_var(&cyberfb_default, &par);
+ Cyber_encode_var(&cyberfb_default, &par);
+
+ do_fb_set_var(&cyberfb_default, 1);
+ cyberfb_get_var(&fb_display[0].var, -1, &fb_info);
+ cyberfb_set_disp(-1, &fb_info);
+ do_install_cmap(0, &fb_info);
+
+ if (register_framebuffer(&fb_info) < 0) {
+ DPRINTK("EXIT - register_framebuffer failed\n");
+ return -1;
+ }
+
+ printk("fb%d: %s frame buffer device, using %ldK of video memory\n",
+ GET_FB_IDX(fb_info.node), fb_info.modename, CyberSize>>10);
+
+ DPRINTK("EXIT\n");
+ return 0;
+}
+
+
+#ifdef CONFIG_ZORRO
+int __init cyberfb_init_zorro(void)
{
unsigned long board_addr, board_size;
struct cyberfb_par par;
@@ -1059,70 +1135,105 @@
DPRINTK("ENTER\n");
while ((z = zorro_find_device(ZORRO_PROD_PHASE5_CYBERVISION64, z))) {
- board_addr = z->resource.start;
- board_size = z->resource.end-z->resource.start+1;
- CyberMem_phys = board_addr + 0x01400000;
- CyberRegs_phys = CyberMem_phys + 0x00c00000;
- if (!request_mem_region(CyberRegs_phys, 0x10000, "S3 Trio64"))
- continue;
- if (!request_mem_region(CyberMem_phys, 0x400000, "RAM")) {
- release_mem_region(CyberRegs_phys, 0x10000);
- continue;
- }
- DPRINTK("board_addr=%08lx\n", board_addr);
- DPRINTK("board_size=%08lx\n", board_size);
-
- CyberBase = ioremap(board_addr, board_size);
- CyberRegs = CyberBase + 0x02000000;
- CyberMem = CyberBase + 0x01400000;
- DPRINTK("CyberBase=%08lx CyberRegs=%08lx CyberMem=%08lx\n",
- CyberBase, (long unsigned int)CyberRegs, CyberMem);
+ board_addr = z->resource.start;
+ board_size = z->resource.end-z->resource.start+1;
+ CyberMem_phys = board_addr + 0x01400000;
+ CyberRegs_phys = CyberMem_phys + 0x00c00000;
+ if (!request_mem_region(CyberRegs_phys, 0x10000, "S3 Trio64"))
+ continue;
+ if (!request_mem_region(CyberMem_phys, 0x400000, "RAM")) {
+ release_mem_region(CyberRegs_phys, 0x10000);
+ continue;
+ }
+ DPRINTK("board_addr=%08lx\n", board_addr);
+ DPRINTK("board_size=%08lx\n", board_size);
-#ifdef CYBERFBDEBUG
- DPRINTK("Register state just after mapping memory\n");
- cv64_dump();
-#endif
+ CyberBase = ioremap(board_addr, board_size);
+ CyberRegs = CyberBase + 0x02000000;
+ CyberMem = CyberBase + 0x01400000;
+ DPRINTK("CyberBase=%08lx CyberRegs=%08lx CyberMem=%08lx\n",
+ CyberBase, (long unsigned int)CyberRegs, CyberMem);
+
+ if (cyberfb_init_device() < 0) {
+ DPRINTK("EXIT - cyberfb_init_device failed\n");
+ release_mem_region(CyberMem_phys, 0x400000);
+ release_mem_region(CyberRegs_phys, 0x10000);
+ return -EINVAL;
+ }
- strcpy(fb_info.modename, cyberfb_name);
- fb_info.changevar = NULL;
- fb_info.node = -1;
- fb_info.fbops = &cyberfb_ops;
- fb_info.disp = &disp;
- fb_info.switch_con = &Cyberfb_switch;
- fb_info.updatevar = &Cyberfb_updatevar;
- fb_info.blank = &Cyberfb_blank;
-
- Cyber_init();
- /* ++Andre: set cyberfb default mode */
- if (!cyberfb_usermode) {
- cyberfb_default = cyberfb_predefined[CYBER8_DEFMODE].var;
- DPRINTK("Use default cyber8 mode\n");
- }
- Cyber_decode_var(&cyberfb_default, &par);
- Cyber_encode_var(&cyberfb_default, &par);
-
- do_fb_set_var(&cyberfb_default, 1);
- cyberfb_get_var(&fb_display[0].var, -1, &fb_info);
- cyberfb_set_disp(-1, &fb_info);
- do_install_cmap(0, &fb_info);
-
- if (register_framebuffer(&fb_info) < 0) {
- DPRINTK("EXIT - register_framebuffer failed\n");
- release_mem_region(CyberMem_phys, 0x400000);
- release_mem_region(CyberRegs_phys, 0x10000);
- return -EINVAL;
- }
-
- printk("fb%d: %s frame buffer device, using %ldK of video memory\n",
- GET_FB_IDX(fb_info.node), fb_info.modename, CyberSize>>10);
-
- /* TODO: This driver cannot be unloaded yet */
- MOD_INC_USE_COUNT;
- DPRINTK("EXIT\n");
- return 0;
+ DPRINTK("EXIT\n");
+ return 0;
}
return -ENXIO;
}
+#endif
+
+int __init cyberfb_init_pci(void)
+{
+ struct pci_dev *dp = NULL;
+ unsigned long address, size;
+
+ if (disabled)
+ return -ENXIO;
+
+ dp = pci_find_device(PCI_VENDOR_ID_S3, PCI_DEVICE_ID_S3_TRIO, dp);
+ if (!dp)
+ dp = pci_find_device(PCI_VENDOR_ID_S3, PCI_DEVICE_ID_S3_AURORA64VP, dp);
+
+ if ((dp != 0) && ((dp->class >> 16) == PCI_BASE_CLASS_DISPLAY)) {
+
+ if (pci_enable_device(dp)) {
+ printk(KERN_ERR "cyberfb: failed to enable PCI device\n");
+ return -EINVAL;
+ }
+
+ /* There is only one memory region and it covers the mmio and fb areas */
+ address = pci_resource_start(dp, 0);
+ size = pci_resource_len(dp, 0); /* size = 64*1024*1024; */
+ if (!request_mem_region(address, size, "S3 Trio")) {
+ printk("cyberfb: failed to allocate memory region\n");
+ return -EINVAL;
+ }
+
+ CyberBase = NULL;
+ CyberMem = ioremap(address, size);
+ /* XXX this memory mapping scheme works only on powerpc */
+ CyberRegs = (volatile unsigned char *) _IO_BASE;
+
+ CyberMem_phys = address;
+ /* XXX wrong, but is this (mmio_start) really used? */
+ CyberRegs_phys = 0;
+
+ if (cyberfb_init_device() < 0) {
+ DPRINTK("EXIT - cyberfb_init_device failed\n");
+ release_mem_region(address, size);
+ return -EINVAL;
+ }
+
+ return 0;
+ } else
+ return -ENODEV;
+}
+
+int __init cyberfb_init(void)
+{
+ int retval = -ENXIO;
+
+#ifdef CONFIG_ZORRO
+ retval = cyberfb_init_zorro();
+#endif
+
+ if (retval == -ENXIO) {
+ retval = cyberfb_init_pci();
+ }
+
+ if (retval == 0) {
+ /* TODO: This driver cannot be unloaded yet */
+ MOD_INC_USE_COUNT;
+ }
+
+ return retval;
+}
static int Cyberfb_switch(int con, struct fb_info *info)
@@ -1583,22 +1694,28 @@
/*
* Special CyberVision 64 board operations
*/
- /* Reset board */
- for (i = 0; i < 6; i++) {
- cv64_write_port (0xff, CyberBase);
+
+ if (! AURORA) {
+ /* Reset board */
+ for (i = 0; i < 6; i++) {
+ cv64_write_port (0xff, CyberBase);
+ }
+ /* Return to operational mode */
+ cv64_write_port (0x8004, CyberBase);
}
- /* Return to operational mode */
- cv64_write_port (0x8004, CyberBase);
/*
* Generic (?) S3 chip wakeup
*/
- /* Disable I/O & memory decoders, video in setup mode */
- wb_64 (regs, SREG_VIDEO_SUBS_ENABLE, 0x10);
- /* Video responds to cmds, addrs & data */
- wb_64 (regs, SREG_OPTION_SELECT, 0x1);
- /* Enable I/O & memory decoders, video in operational mode */
- wb_64 (regs, SREG_VIDEO_SUBS_ENABLE, 0x8);
+
+ if (! AURORA) {
+ /* Disable I/O & memory decoders, video in setup mode */
+ wb_64 (regs, SREG_VIDEO_SUBS_ENABLE, 0x10);
+ /* Video responds to cmds, addrs & data */
+ wb_64 (regs, SREG_OPTION_SELECT, 0x1);
+ /* Enable I/O & memory decoders, video in operational mode */
+ wb_64 (regs, SREG_VIDEO_SUBS_ENABLE, 0x8);
+ }
/* VGA color emulation, enable cpu access to display mem */
wb_64 (regs, GREG_MISC_OUTPUT_W, 0x03);
/* Unlock S3 VGA regs */
@@ -1615,9 +1732,13 @@
* bit 0=1: Enable enhaced mode functions
* bit 2=0: Enhanced mode 8+ bits/pixel
* bit 4=1: Enable linear addressing
- * bit 5=1: Enable MMIO
+ * bit 5=1: Enable MMIO (except on Aurora 64V+)
*/
wb_64 (regs, ECR_ADV_FUNC_CNTL, 0x31);
+ if (AURORA) {
+ /* Enable new-style MMIO on Aurora 64V+ */
+ WCrt(regs, CRT_ID_EXT_MEM_CNTL_1, 0x08);
+ }
/*
* bit 0=1: Color emulation
* bit 1=1: Enable CPU access to display memory
@@ -1642,12 +1763,15 @@
/* Unlock S3 extensions to VGA Sequencer regs */
WSeq (regs, SEQ_ID_UNLOCK_EXT, 0x6);
- /* Enable 4MB fast page mode */
- test = RSeq (regs, SEQ_ID_BUS_REQ_CNTL);
- test = test | 1 << 6;
- WSeq (regs, SEQ_ID_BUS_REQ_CNTL, test);
+ if (! AURORA) {
+ /* Enable 4MB fast page mode */
+ test = RSeq (regs, SEQ_ID_BUS_REQ_CNTL);
+ test = test | 1 << 6;
+ WSeq (regs, SEQ_ID_BUS_REQ_CNTL, test);
+ }
/* Faster LUT write: 1 DCLK LUT write cycle, RAMDAC clk doubled */
+ /* XXX may be able to powerdown RAMDAC on Aurora 64V+ if no CRT */
WSeq (regs, SEQ_ID_RAMDAC_CNTL, 0xC0);
/* Clear immediate clock load bit */
@@ -1750,8 +1874,8 @@
wb_64 (regs, VDAC_MASK, 0xFF);
- *((unsigned long *) (regs + ECR_FRGD_COLOR)) = 0xFF;
- *((unsigned long *) (regs + ECR_BKGD_COLOR)) = 0;
+ wl_64 (regs, ECR_FRGD_COLOR, 0xFF);
+ wl_64 (regs, ECR_BKGD_COLOR, 0);
/* Colors initially set to grayscale */
@@ -1823,7 +1947,7 @@
gfx_on_off (0, regs);
/* Pass-through */
- cvscreen (0, CyberBase);
+ if (! AURORA) cvscreen (0, CyberBase);
DPRINTK("EXIT\n");
}
@@ -2060,9 +2184,11 @@
test = RCrt (regs, CRT_ID_EXT_MISC_CNTL_2);
test &= 0xD;
- /* Clear roxxler byte-swapping... */
- cv64_write_port (0x0040, CyberBase);
- cv64_write_port (0x0020, CyberBase);
+ if (! AURORA) {
+ /* Clear roxxler byte-swapping... */
+ cv64_write_port (0x0040, CyberBase);
+ cv64_write_port (0x0020, CyberBase);
+ }
switch (video_mode->bits_per_pixel) {
case 1:
@@ -2081,14 +2207,14 @@
break;
case 15:
- cv64_write_port (0x8020, CyberBase);
+ if (! AURORA) cv64_write_port (0x8020, CyberBase);
clock_mode = 0x30;
HDE = video_mode->xres / 4;
cr50 |= 0x10;
break;
case 16:
- cv64_write_port (0x8020, CyberBase);
+ if (! AURORA) cv64_write_port (0x8020, CyberBase);
clock_mode = 0x50;
HDE = video_mode->xres / 4;
cr50 |= 0x10;
@@ -2096,7 +2222,7 @@
case 24:
case 32:
- cv64_write_port (0x8040, CyberBase);
+ if (! AURORA) cv64_write_port (0x8040, CyberBase);
clock_mode = 0xD0;
HDE = video_mode->xres / 2;
cr50 |= 0x30;
@@ -2207,7 +2333,7 @@
gfx_on_off (0, (volatile unsigned char *) regs);
/* Pass-through */
- cvscreen (0, CyberBase);
+ if (! AURORA) cvscreen (0, CyberBase);
DPRINTK("EXIT\n");
}
--- /powerpc/dist-2.4.20/drivers/video/cyberfb.h Wed Aug 15 04:22:16 2001
+++ /powerpc/linux-2.4.20/drivers/video/cyberfb.h Tue Apr 15 10:07:07 2003
@@ -120,10 +120,6 @@
#define GRFBBOPset 0xf /* 1 */
-/* Write 16 Bit VGA register */
-#define vgaw16(ba, reg, val) \
-*((unsigned short *) (((volatile unsigned char *)ba)+reg)) = val
-
/*
* Defines for the used register addresses (mw)
*
^ permalink raw reply [flat|nested] 2+ messages in thread
* Re: Patch to cyberfb.c to drive Aurora 64 V+ (fwd)
2003-07-04 14:25 Patch to cyberfb.c to drive Aurora 64 V+ (fwd) Geert Uytterhoeven
@ 2003-07-04 14:43 ` Jeff Garzik
0 siblings, 0 replies; 2+ messages in thread
From: Jeff Garzik @ 2003-07-04 14:43 UTC (permalink / raw)
To: Geert Uytterhoeven; +Cc: Linux Frame Buffer Device Development, baccala
Geert Uytterhoeven wrote:
> ---------- Forwarded message ----------
> Date: Wed, 2 Jul 2003 15:57:15 -0400 (EDT)
> From: Brent Baccala <baccala@vger.freesoft.org>
> To: linux-kernel@vger.kernel.org
> Cc: hartwinleen@gmx.net
> Subject: Patch to cyberfb.c to drive Aurora 64 V+
>
> Hi -
>
> I'm attaching a patch to 2.4.20's drivers/video/cyberfb.c to drive the
> S3 Aurora 64 V+ chip
>
> cyberfb.c is a fairly generic S3 driver, so half of this patch is
> byte-ordering and probing on the PCI bus as well as the Zorro bus.
>
> Unfortunately, the machine I was developing this on died, and the
> patch really isn't finished yet. It works, but it has some problems
> (if you try to start a 16-color X server, you'll see; 256-color works
> fine, though, full color had some kind of problem, I recall). It
> also has some "#if 0"s that really should be better conditionals.
>
> But, the machine is dead, and barring a resurrection, I won't be
> doing any more work on this code. It's a good starting point for
> anyone try to get an S3 Aurora V+ running with the kernel framebuffer
> code, and, I dare say, anyone with another kind of S3 or S3-compatible
> card should find it a good start.
>
> Sorry about the half-finished code, but "release early, release often",
> so maybe somebody else can get some good from it.
Very cool!
For someone interested in this, there is also my cyberfb and s3fb work:
http://gtf.org/garzik/kernel/files/s3fb/
(also unfinished)
Jeff
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2003-07-04 14:25 Patch to cyberfb.c to drive Aurora 64 V+ (fwd) Geert Uytterhoeven
2003-07-04 14:43 ` Jeff Garzik
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