forked from Minki/linux
[PATCH] DEC PMAG BA frame buffer update
Rewrite PMAG BA frame buffer driver for 2.6. Acked-by: Antonino Daplas <adaplas@pol.net> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
Ralf Baechle
Linus Torvalds
parent
61838ffeee
commit
af690a948c
@ -1,57 +1,55 @@
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/*
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* linux/drivers/video/pmag-ba-fb.c
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* linux/drivers/video/pmag-ba-fb.c
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*
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* PMAG-BA TurboChannel framebuffer card support ... derived from:
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* PMAG-BA TURBOchannel Color Frame Buffer (CFB) card support,
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* derived from:
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* "HP300 Topcat framebuffer support (derived from macfb of all things)
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* Phil Blundell <philb@gnu.org> 1998", the original code can be
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* found in the file hpfb.c in the same directory.
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* found in the file hpfb.c in the same directory.
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*
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* Based on digital document:
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* "PMAG-BA TURBOchannel Color Frame Buffer
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* Functional Specification", Revision 1.2, August 27, 1990
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*
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* DECstation related code Copyright (C) 1999, 2000, 2001 by
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* Michael Engel <engel@unix-ag.org>,
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* Karsten Merker <merker@linuxtag.org> and
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* DECstation related code Copyright (C) 1999, 2000, 2001 by
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* Michael Engel <engel@unix-ag.org>,
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* Karsten Merker <merker@linuxtag.org> and
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* Harald Koerfgen.
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* This file is subject to the terms and conditions of the GNU General
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* Public License. See the file COPYING in the main directory of this
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* archive for more details.
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* Copyright (c) 2005 Maciej W. Rozycki
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*
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* This file is subject to the terms and conditions of the GNU General
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* Public License. See the file COPYING in the main directory of this
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* archive for more details.
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*/
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#include <linux/module.h>
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#include <linux/kernel.h>
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#include <linux/sched.h>
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#include <linux/compiler.h>
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#include <linux/errno.h>
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#include <linux/string.h>
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#include <linux/timer.h>
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#include <linux/mm.h>
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#include <linux/tty.h>
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#include <linux/slab.h>
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#include <linux/delay.h>
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#include <linux/init.h>
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#include <linux/fb.h>
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#include <asm/bootinfo.h>
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#include <asm/dec/machtype.h>
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#include <linux/init.h>
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/types.h>
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#include <asm/bug.h>
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#include <asm/io.h>
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#include <asm/system.h>
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#include <asm/dec/tc.h>
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#include <video/pmag-ba-fb.h>
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struct pmag_ba_ramdac_regs {
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unsigned char addr_low;
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unsigned char pad0[3];
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unsigned char addr_hi;
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unsigned char pad1[3];
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unsigned char data;
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unsigned char pad2[3];
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unsigned char cmap;
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struct pmagbafb_par {
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struct fb_info *next;
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volatile void __iomem *mmio;
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volatile u32 __iomem *dac;
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int slot;
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};
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/*
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* Max 3 TURBOchannel slots -> max 3 PMAG-BA :)
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*/
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static struct fb_info pmagba_fb_info[3];
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static struct fb_var_screeninfo pmagbafb_defined = {
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static struct fb_info *root_pmagbafb_dev;
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static struct fb_var_screeninfo pmagbafb_defined __initdata = {
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.xres = 1024,
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.yres = 864,
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.xres_virtual = 1024,
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@ -61,58 +59,71 @@ static struct fb_var_screeninfo pmagbafb_defined = {
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.green.length = 8,
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.blue.length = 8,
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.activate = FB_ACTIVATE_NOW,
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.height = 274,
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.width = 195,
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.accel = FB_ACCEL_NONE,
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.height = -1,
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.width = -1,
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.accel_flags = FB_ACCEL_NONE,
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.pixclock = 14452,
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.left_margin = 116,
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.right_margin = 12,
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.upper_margin = 34,
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.lower_margin = 12,
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.hsync_len = 128,
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.vsync_len = 3,
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.sync = FB_SYNC_ON_GREEN,
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.vmode = FB_VMODE_NONINTERLACED,
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};
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static struct fb_fix_screeninfo pmagbafb_fix = {
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static struct fb_fix_screeninfo pmagbafb_fix __initdata = {
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.id = "PMAG-BA",
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.smem_len = (1024 * 864),
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.smem_len = (1024 * 1024),
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.type = FB_TYPE_PACKED_PIXELS,
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.visual = FB_VISUAL_PSEUDOCOLOR,
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.line_length = 1024,
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.mmio_len = PMAG_BA_SIZE - PMAG_BA_BT459,
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};
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/*
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* Turn hardware cursor off
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*/
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void pmagbafb_erase_cursor(struct pmag_ba_ramdac_regs *bt459_regs)
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static inline void dac_write(struct pmagbafb_par *par, unsigned int reg, u8 v)
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{
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bt459_regs->addr_low = 0;
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bt459_regs->addr_hi = 3;
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bt459_regs->data = 0;
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writeb(v, par->dac + reg / 4);
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}
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/*
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* Set the palette.
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*/
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static int pmagbafb_setcolreg(unsigned regno, unsigned red, unsigned green,
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unsigned blue, unsigned transp,
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struct fb_info *info)
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static inline u8 dac_read(struct pmagbafb_par *par, unsigned int reg)
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{
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struct pmag_ba_ramdac_regs *bt459_regs = (struct pmag_ba_ramdac_regs *) info->par;
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return readb(par->dac + reg / 4);
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}
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if (regno >= info->cmap.len)
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return 1;
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/*
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* Set the palette.
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*/
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static int pmagbafb_setcolreg(unsigned int regno, unsigned int red,
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unsigned int green, unsigned int blue,
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unsigned int transp, struct fb_info *info)
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{
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struct pmagbafb_par *par = info->par;
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BUG_ON(regno >= info->cmap.len);
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red >>= 8; /* The cmap fields are 16 bits */
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green >>= 8; /* wide, but the harware colormap */
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green >>= 8; /* wide, but the hardware colormap */
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blue >>= 8; /* registers are only 8 bits wide */
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bt459_regs->addr_low = (__u8) regno;
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bt459_regs->addr_hi = 0;
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bt459_regs->cmap = red;
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bt459_regs->cmap = green;
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bt459_regs->cmap = blue;
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mb();
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dac_write(par, BT459_ADDR_LO, regno);
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dac_write(par, BT459_ADDR_HI, 0x00);
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wmb();
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dac_write(par, BT459_CMAP, red);
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wmb();
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dac_write(par, BT459_CMAP, green);
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wmb();
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dac_write(par, BT459_CMAP, blue);
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return 0;
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}
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static struct fb_ops pmagbafb_ops = {
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.owner = THIS_MODULE,
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.fb_get_fix = gen_get_fix,
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.fb_get_var = gen_get_var,
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.fb_setcolreg = pmagbafb_setcolreg,
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.fb_fillrect = cfb_fillrect,
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.fb_copyarea = cfb_copyarea,
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@ -120,63 +131,133 @@ static struct fb_ops pmagbafb_ops = {
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.fb_cursor = soft_cursor,
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};
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int __init pmagbafb_init_one(int slot)
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/*
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* Turn the hardware cursor off.
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*/
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static void __init pmagbafb_erase_cursor(struct fb_info *info)
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{
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unsigned long base_addr = get_tc_base_addr(slot);
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struct fb_info *info = &pmagba_fb_info[slot];
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struct display *disp = &pmagba_disp[slot];
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struct pmagbafb_par *par = info->par;
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printk("PMAG-BA framebuffer in slot %d\n", slot);
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/*
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* Framebuffer display memory base address and friends
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*/
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pmagbafb_fix.smem_start = base_addr + PMAG_BA_ONBOARD_FBMEM_OFFSET;
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info->par = (base_addr + PMAG_BA_BT459_OFFSET);
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mb();
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dac_write(par, BT459_ADDR_LO, 0x00);
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dac_write(par, BT459_ADDR_HI, 0x03);
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wmb();
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dac_write(par, BT459_DATA, 0x00);
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}
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/*
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* Configure the Bt459 RAM DAC
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*/
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pmagbafb_erase_cursor((struct pmag_ba_ramdac_regs *) info->par);
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/*
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* Let there be consoles..
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*/
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static int __init pmagbafb_init_one(int slot)
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{
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struct fb_info *info;
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struct pmagbafb_par *par;
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unsigned long base_addr;
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info = framebuffer_alloc(sizeof(struct pmagbafb_par), NULL);
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if (!info)
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return -ENOMEM;
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par = info->par;
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par->slot = slot;
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claim_tc_card(par->slot);
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base_addr = get_tc_base_addr(par->slot);
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par->next = root_pmagbafb_dev;
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root_pmagbafb_dev = info;
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if (fb_alloc_cmap(&info->cmap, 256, 0) < 0)
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goto err_alloc;
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info->fbops = &pmagbafb_ops;
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info->fix = pmagbafb_fix;
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info->var = pmagbafb_defined;
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info->fix = pmagbafb_fix;
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info->screen_base = pmagbafb_fix.smem_start;
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info->flags = FBINFO_DEFAULT;
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fb_alloc_cmap(&fb_info.cmap, 256, 0);
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/* MMIO mapping setup. */
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info->fix.mmio_start = base_addr;
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par->mmio = ioremap_nocache(info->fix.mmio_start, info->fix.mmio_len);
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if (!par->mmio)
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goto err_cmap;
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par->dac = par->mmio + PMAG_BA_BT459;
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/* Frame buffer mapping setup. */
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info->fix.smem_start = base_addr + PMAG_BA_FBMEM;
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info->screen_base = ioremap_nocache(info->fix.smem_start,
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info->fix.smem_len);
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if (!info->screen_base)
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goto err_mmio_map;
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info->screen_size = info->fix.smem_len;
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pmagbafb_erase_cursor(info);
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if (register_framebuffer(info) < 0)
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return 1;
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goto err_smem_map;
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pr_info("fb%d: %s frame buffer device in slot %d\n",
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info->node, info->fix.id, par->slot);
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return 0;
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err_smem_map:
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iounmap(info->screen_base);
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err_mmio_map:
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iounmap(par->mmio);
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err_cmap:
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fb_dealloc_cmap(&info->cmap);
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err_alloc:
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root_pmagbafb_dev = par->next;
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release_tc_card(par->slot);
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framebuffer_release(info);
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return -ENXIO;
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}
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/*
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* Initialise the framebuffer
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*/
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int __init pmagbafb_init(void)
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static void __exit pmagbafb_exit_one(void)
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{
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int sid;
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int found = 0;
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struct fb_info *info = root_pmagbafb_dev;
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struct pmagbafb_par *par = info->par;
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unregister_framebuffer(info);
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iounmap(info->screen_base);
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iounmap(par->mmio);
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fb_dealloc_cmap(&info->cmap);
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root_pmagbafb_dev = par->next;
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release_tc_card(par->slot);
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framebuffer_release(info);
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}
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/*
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* Initialise the framebuffer.
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*/
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static int __init pmagbafb_init(void)
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{
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int count = 0;
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int slot;
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if (fb_get_options("pmagbafb", NULL))
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return -ENODEV;
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return -ENXIO;
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if (TURBOCHANNEL) {
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while ((sid = search_tc_card("PMAG-BA")) >= 0) {
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found = 1;
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claim_tc_card(sid);
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pmagbafb_init_one(sid);
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}
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return found ? 0 : -ENODEV;
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} else {
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return -ENODEV;
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while ((slot = search_tc_card("PMAG-BA")) >= 0) {
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if (pmagbafb_init_one(slot) < 0)
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break;
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count++;
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}
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return (count > 0) ? 0 : -ENXIO;
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}
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static void __exit pmagbafb_exit(void)
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{
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while (root_pmagbafb_dev)
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pmagbafb_exit_one();
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}
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module_init(pmagbafb_init);
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module_exit(pmagbafb_exit);
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MODULE_LICENSE("GPL");
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@ -1,24 +1,27 @@
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/*
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* linux/drivers/video/pmag-ba-fb.h
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* linux/include/video/pmag-ba-fb.h
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*
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* TurboChannel PMAG-BA framebuffer card support,
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* Copyright (C) 1999,2000,2001 by
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* Michael Engel <engel@unix-ag.org>,
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* Karsten Merker <merker@linuxtag.org>
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* This file is subject to the terms and conditions of the GNU General
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* Public License. See the file COPYING in the main directory of this
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* archive for more details.
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* TURBOchannel PMAG-BA Color Frame Buffer (CFB) card support,
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* Copyright (C) 1999, 2000, 2001 by
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* Michael Engel <engel@unix-ag.org>,
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* Karsten Merker <merker@linuxtag.org>
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* Copyright (c) 2005 Maciej W. Rozycki
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*
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* This file is subject to the terms and conditions of the GNU General
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* Public License. See the file COPYING in the main directory of this
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* archive for more details.
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*/
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/*
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* Bt459 RAM DAC register base offset (rel. to TC slot base address)
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*/
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/* IOmem resource offsets. */
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#define PMAG_BA_FBMEM 0x000000 /* frame buffer */
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#define PMAG_BA_BT459 0x200000 /* Bt459 RAMDAC */
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#define PMAG_BA_IRQ 0x300000 /* IRQ acknowledge */
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#define PMAG_BA_ROM 0x380000 /* REX option ROM */
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#define PMAG_BA_BT438 0x380000 /* Bt438 clock chip reset */
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#define PMAG_BA_SIZE 0x400000 /* address space size */
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#define PMAG_BA_BT459_OFFSET 0x00200000
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/*
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* Begin of PMAG-BA framebuffer memory relative to TC slot address,
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* resolution is 1024x864x8
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*/
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#define PMAG_BA_ONBOARD_FBMEM_OFFSET 0x00000000
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/* Bt459 register offsets, byte-wide registers. */
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#define BT459_ADDR_LO 0x0 /* address low */
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#define BT459_ADDR_HI 0x4 /* address high */
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#define BT459_DATA 0x8 /* data window register */
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#define BT459_CMAP 0xc /* color map window register */
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