forked from Minki/linux
[PATCH] DEC PMAGB B framebuffer update
Revive HX frame buffer support for 2.6. 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
af690a948c
commit
7901c79982
@ -1,114 +1,128 @@
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/*
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* linux/drivers/video/pmagb-b-fb.c
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* linux/drivers/video/pmagb-b-fb.c
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*
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* PMAGB-B TurboChannel framebuffer card support ... derived from:
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* PMAGB-B TURBOchannel Smart Frame Buffer (SFB) 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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* 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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/*
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* We currently only support the PMAGB-B in high resolution mode
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* as I know of no way to detect low resolution mode set via jumper.
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* KM, 2001/01/07
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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/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/compiler.h>
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#include <linux/delay.h>
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#include <linux/init.h>
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#include <linux/errno.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/pmagb-b-fb.h>
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struct pmagb_b_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 pmagbbfb_par {
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struct fb_info *next;
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volatile void __iomem *mmio;
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volatile void __iomem *smem;
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volatile u32 __iomem *sfb;
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volatile u32 __iomem *dac;
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unsigned int osc0;
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unsigned int osc1;
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int slot;
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};
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/*
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* Max 3 TURBOchannel slots -> max 3 PMAGB-B :)
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*/
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static struct fb_info pmagbb_fb_info[3];
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static struct fb_var_screeninfo pmagbbfb_defined = {
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.xres = 1280,
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.yres = 1024,
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.xres_virtual = 1280,
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.yres_virtual = 1024,
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static struct fb_info *root_pmagbbfb_dev;
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static struct fb_var_screeninfo pmagbbfb_defined __initdata = {
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.bits_per_pixel = 8,
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.red.length = 8,
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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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.height = -1,
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.width = -1,
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.accel_flags = FB_ACCEL_NONE,
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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 pmagbbfb_fix __initdata = {
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.id = "PMAGB-BA",
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.smem_len = (1280 * 1024),
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.smem_len = (2048 * 1024),
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.type = FB_TYPE_PACKED_PIXELS,
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.visual = FB_VISUAL_PSEUDOCOLOR,
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.line_length = 1280,
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.mmio_len = PMAGB_B_FBMEM,
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};
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static inline void sfb_write(struct pmagbbfb_par *par, unsigned int reg, u32 v)
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{
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writel(v, par->sfb + reg / 4);
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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 pmagbbfb_erase_cursor(struct pmagb_b_ramdac_regs *bt459_regs)
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static inline u32 sfb_read(struct pmagbbfb_par *par, unsigned int reg)
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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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return readl(par->sfb + 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 pmagbbfb_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 void dac_write(struct pmagbbfb_par *par, unsigned int reg, u8 v)
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{
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struct pmagb_b_ramdac_regs *bt459_regs = (struct pmagb_b_ramdac_regs *) info->par;
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if (regno >= info->cmap.len)
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return 1;
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writeb(v, par->dac + reg / 4);
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}
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static inline u8 dac_read(struct pmagbbfb_par *par, unsigned int reg)
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{
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return readb(par->dac + reg / 4);
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}
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static inline void gp0_write(struct pmagbbfb_par *par, u32 v)
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{
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writel(v, par->mmio + PMAGB_B_GP0);
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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 pmagbbfb_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 pmagbbfb_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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@ -121,62 +135,247 @@ static struct fb_ops pmagbbfb_ops = {
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.fb_cursor = soft_cursor,
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};
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int __init pmagbbfb_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 pmagbbfb_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 = &pmagbb_fb_info[slot];
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struct pmagbbfb_par *par = info->par;
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printk("PMAGB-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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pmagbbfb_fix.smem_start = base_addr + PMAGB_B_ONBOARD_FBMEM_OFFSET;
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info->par = (base_addr + PMAGB_B_BT459_OFFSET);
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/*
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* Configure the Bt459 RAM DAC
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*/
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pmagbbfb_erase_cursor((struct pmagb_b_ramdac_regs *) info->par);
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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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* Set up screen parameters.
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*/
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static void __init pmagbbfb_screen_setup(struct fb_info *info)
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{
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struct pmagbbfb_par *par = info->par;
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info->var.xres = ((sfb_read(par, SFB_REG_VID_HOR) >>
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SFB_VID_HOR_PIX_SHIFT) & SFB_VID_HOR_PIX_MASK) * 4;
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info->var.xres_virtual = info->var.xres;
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info->var.yres = (sfb_read(par, SFB_REG_VID_VER) >>
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SFB_VID_VER_SL_SHIFT) & SFB_VID_VER_SL_MASK;
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info->var.yres_virtual = info->var.yres;
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info->var.left_margin = ((sfb_read(par, SFB_REG_VID_HOR) >>
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SFB_VID_HOR_BP_SHIFT) &
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SFB_VID_HOR_BP_MASK) * 4;
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info->var.right_margin = ((sfb_read(par, SFB_REG_VID_HOR) >>
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SFB_VID_HOR_FP_SHIFT) &
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SFB_VID_HOR_FP_MASK) * 4;
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info->var.upper_margin = (sfb_read(par, SFB_REG_VID_VER) >>
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SFB_VID_VER_BP_SHIFT) & SFB_VID_VER_BP_MASK;
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info->var.lower_margin = (sfb_read(par, SFB_REG_VID_VER) >>
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SFB_VID_VER_FP_SHIFT) & SFB_VID_VER_FP_MASK;
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info->var.hsync_len = ((sfb_read(par, SFB_REG_VID_HOR) >>
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SFB_VID_HOR_SYN_SHIFT) &
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SFB_VID_HOR_SYN_MASK) * 4;
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info->var.vsync_len = (sfb_read(par, SFB_REG_VID_VER) >>
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SFB_VID_VER_SYN_SHIFT) & SFB_VID_VER_SYN_MASK;
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info->fix.line_length = info->var.xres;
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};
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/*
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* Determine oscillator configuration.
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*/
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static void __init pmagbbfb_osc_setup(struct fb_info *info)
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{
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static unsigned int pmagbbfb_freqs[] __initdata = {
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130808, 119843, 104000, 92980, 74367, 72800,
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69197, 66000, 65000, 50350, 36000, 32000, 25175
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};
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struct pmagbbfb_par *par = info->par;
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u32 count0 = 8, count1 = 8, counttc = 16 * 256 + 8;
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u32 freq0, freq1, freqtc = get_tc_speed() / 250;
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int i, j;
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gp0_write(par, 0); /* select Osc0 */
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for (j = 0; j < 16; j++) {
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mb();
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sfb_write(par, SFB_REG_TCCLK_COUNT, 0);
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mb();
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for (i = 0; i < 100; i++) { /* nominally max. 20.5us */
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if (sfb_read(par, SFB_REG_TCCLK_COUNT) == 0)
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break;
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udelay(1);
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}
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count0 += sfb_read(par, SFB_REG_VIDCLK_COUNT);
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}
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gp0_write(par, 1); /* select Osc1 */
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for (j = 0; j < 16; j++) {
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mb();
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sfb_write(par, SFB_REG_TCCLK_COUNT, 0);
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for (i = 0; i < 100; i++) { /* nominally max. 20.5us */
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if (sfb_read(par, SFB_REG_TCCLK_COUNT) == 0)
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break;
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udelay(1);
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}
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count1 += sfb_read(par, SFB_REG_VIDCLK_COUNT);
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}
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freq0 = (freqtc * count0 + counttc / 2) / counttc;
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par->osc0 = freq0;
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if (freq0 >= pmagbbfb_freqs[0] - (pmagbbfb_freqs[0] + 32) / 64 &&
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freq0 <= pmagbbfb_freqs[0] + (pmagbbfb_freqs[0] + 32) / 64)
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par->osc0 = pmagbbfb_freqs[0];
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freq1 = (par->osc0 * count1 + count0 / 2) / count0;
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par->osc1 = freq1;
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for (i = 0; i < sizeof(pmagbbfb_freqs) / sizeof(*pmagbbfb_freqs); i++)
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if (freq1 >= pmagbbfb_freqs[i] -
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(pmagbbfb_freqs[i] + 128) / 256 &&
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freq1 <= pmagbbfb_freqs[i] +
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(pmagbbfb_freqs[i] + 128) / 256) {
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par->osc1 = pmagbbfb_freqs[i];
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break;
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}
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if (par->osc0 - par->osc1 <= (par->osc0 + par->osc1 + 256) / 512 ||
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par->osc1 - par->osc0 <= (par->osc0 + par->osc1 + 256) / 512)
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par->osc1 = 0;
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gp0_write(par, par->osc1 != 0); /* reselect OscX */
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info->var.pixclock = par->osc1 ?
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(1000000000 + par->osc1 / 2) / par->osc1 :
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(1000000000 + par->osc0 / 2) / par->osc0;
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};
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static int __init pmagbbfb_init_one(int slot)
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{
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char freq0[12], freq1[12];
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struct fb_info *info;
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struct pmagbbfb_par *par;
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unsigned long base_addr;
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u32 vid_base;
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info = framebuffer_alloc(sizeof(struct pmagbbfb_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_pmagbbfb_dev;
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root_pmagbbfb_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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/*
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* Let there be consoles..
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*/
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info->fbops = &pmagbbfb_ops;
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info->var = pmagbbfb_defined;
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info->fix = pmagbbfb_fix;
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info->screen_base = pmagbbfb_fix.smem_start;
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info->var = pmagbbfb_defined;
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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->sfb = par->mmio + PMAGB_B_SFB;
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par->dac = par->mmio + PMAGB_B_BT459;
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/* Frame buffer mapping setup. */
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info->fix.smem_start = base_addr + PMAGB_B_FBMEM;
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par->smem = ioremap_nocache(info->fix.smem_start, info->fix.smem_len);
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if (!par->smem)
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goto err_mmio_map;
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vid_base = sfb_read(par, SFB_REG_VID_BASE);
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info->screen_base = (void __iomem *)par->smem + vid_base * 0x1000;
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info->screen_size = info->fix.smem_len - 2 * vid_base * 0x1000;
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pmagbbfb_erase_cursor(info);
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pmagbbfb_screen_setup(info);
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pmagbbfb_osc_setup(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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snprintf(freq0, sizeof(freq0), "%u.%03uMHz",
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par->osc0 / 1000, par->osc0 % 1000);
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snprintf(freq1, sizeof(freq1), "%u.%03uMHz",
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par->osc1 / 1000, par->osc1 % 1000);
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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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pr_info("fb%d: Osc0: %s, Osc1: %s, Osc%u selected\n",
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info->node, freq0, par->osc1 ? freq1 : "disabled",
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par->osc1 != 0);
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return 0;
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err_smem_map:
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iounmap(par->smem);
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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_pmagbbfb_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 pmagbbfb_init(void)
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static void __exit pmagbbfb_exit_one(void)
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{
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int sid;
|
||||
int found = 0;
|
||||
struct fb_info *info = root_pmagbbfb_dev;
|
||||
struct pmagbbfb_par *par = info->par;
|
||||
|
||||
unregister_framebuffer(info);
|
||||
iounmap(par->smem);
|
||||
iounmap(par->mmio);
|
||||
fb_dealloc_cmap(&info->cmap);
|
||||
root_pmagbbfb_dev = par->next;
|
||||
release_tc_card(par->slot);
|
||||
framebuffer_release(info);
|
||||
}
|
||||
|
||||
|
||||
/*
|
||||
* Initialise the framebuffer.
|
||||
*/
|
||||
static int __init pmagbbfb_init(void)
|
||||
{
|
||||
int count = 0;
|
||||
int slot;
|
||||
|
||||
if (fb_get_options("pmagbbfb", NULL))
|
||||
return -ENODEV;
|
||||
return -ENXIO;
|
||||
|
||||
if (TURBOCHANNEL) {
|
||||
while ((sid = search_tc_card("PMAGB-BA")) >= 0) {
|
||||
found = 1;
|
||||
claim_tc_card(sid);
|
||||
pmagbbfb_init_one(sid);
|
||||
}
|
||||
return found ? 0 : -ENODEV;
|
||||
} else {
|
||||
return -ENODEV;
|
||||
while ((slot = search_tc_card("PMAGB-BA")) >= 0) {
|
||||
if (pmagbbfb_init_one(slot) < 0)
|
||||
break;
|
||||
count++;
|
||||
}
|
||||
return (count > 0) ? 0 : -ENXIO;
|
||||
}
|
||||
|
||||
static void __exit pmagbbfb_exit(void)
|
||||
{
|
||||
while (root_pmagbbfb_dev)
|
||||
pmagbbfb_exit_one();
|
||||
}
|
||||
|
||||
|
||||
module_init(pmagbbfb_init);
|
||||
module_exit(pmagbbfb_exit);
|
||||
|
||||
MODULE_LICENSE("GPL");
|
||||
|
||||
@ -1,32 +1,58 @@
|
||||
/*
|
||||
* linux/drivers/video/pmagb-b-fb.h
|
||||
* linux/include/video/pmagb-b-fb.h
|
||||
*
|
||||
* TurboChannel PMAGB-B framebuffer card support,
|
||||
* Copyright (C) 1999, 2000, 2001 by
|
||||
* Michael Engel <engel@unix-ag.org> and
|
||||
* Karsten Merker <merker@linuxtag.org>
|
||||
* This file is subject to the terms and conditions of the GNU General
|
||||
* Public License. See the file COPYING in the main directory of this
|
||||
* archive for more details.
|
||||
* TURBOchannel PMAGB-B Smart Frame Buffer (SFB) card support,
|
||||
* Copyright (C) 1999, 2000, 2001 by
|
||||
* Michael Engel <engel@unix-ag.org> and
|
||||
* Karsten Merker <merker@linuxtag.org>
|
||||
* Copyright (c) 2005 Maciej W. Rozycki
|
||||
*
|
||||
* This file is subject to the terms and conditions of the GNU General
|
||||
* Public License. See the file COPYING in the main directory of this
|
||||
* archive for more details.
|
||||
*/
|
||||
|
||||
/* IOmem resource offsets. */
|
||||
#define PMAGB_B_ROM 0x000000 /* REX option ROM */
|
||||
#define PMAGB_B_SFB 0x100000 /* SFB ASIC */
|
||||
#define PMAGB_B_GP0 0x140000 /* general purpose output 0 */
|
||||
#define PMAGB_B_GP1 0x180000 /* general purpose output 1 */
|
||||
#define PMAGB_B_BT459 0x1c0000 /* Bt459 RAMDAC */
|
||||
#define PMAGB_B_FBMEM 0x200000 /* frame buffer */
|
||||
#define PMAGB_B_SIZE 0x400000 /* address space size */
|
||||
|
||||
/*
|
||||
* Bt459 RAM DAC register base offset (rel. to TC slot base address)
|
||||
*/
|
||||
#define PMAGB_B_BT459_OFFSET 0x001C0000
|
||||
/* IOmem register offsets. */
|
||||
#define SFB_REG_VID_HOR 0x64 /* video horizontal setup */
|
||||
#define SFB_REG_VID_VER 0x68 /* video vertical setup */
|
||||
#define SFB_REG_VID_BASE 0x6c /* video base address */
|
||||
#define SFB_REG_TCCLK_COUNT 0x78 /* TURBOchannel clock count */
|
||||
#define SFB_REG_VIDCLK_COUNT 0x7c /* video clock count */
|
||||
|
||||
/*
|
||||
* Begin of PMAGB-B framebuffer memory, resolution is configurable:
|
||||
* 1024x864x8 or 1280x1024x8, settable by jumper on the card
|
||||
*/
|
||||
#define PMAGB_B_ONBOARD_FBMEM_OFFSET 0x00201000
|
||||
/* Video horizontal setup register constants. All bits are r/w. */
|
||||
#define SFB_VID_HOR_BP_SHIFT 0x15 /* back porch */
|
||||
#define SFB_VID_HOR_BP_MASK 0x7f
|
||||
#define SFB_VID_HOR_SYN_SHIFT 0x0e /* sync pulse */
|
||||
#define SFB_VID_HOR_SYN_MASK 0x7f
|
||||
#define SFB_VID_HOR_FP_SHIFT 0x09 /* front porch */
|
||||
#define SFB_VID_HOR_FP_MASK 0x1f
|
||||
#define SFB_VID_HOR_PIX_SHIFT 0x00 /* active video */
|
||||
#define SFB_VID_HOR_PIX_MASK 0x1ff
|
||||
|
||||
/*
|
||||
* Bt459 register offsets, byte-wide registers
|
||||
*/
|
||||
/* Video vertical setup register constants. All bits are r/w. */
|
||||
#define SFB_VID_VER_BP_SHIFT 0x16 /* back porch */
|
||||
#define SFB_VID_VER_BP_MASK 0x3f
|
||||
#define SFB_VID_VER_SYN_SHIFT 0x10 /* sync pulse */
|
||||
#define SFB_VID_VER_SYN_MASK 0x3f
|
||||
#define SFB_VID_VER_FP_SHIFT 0x0b /* front porch */
|
||||
#define SFB_VID_VER_FP_MASK 0x1f
|
||||
#define SFB_VID_VER_SL_SHIFT 0x00 /* active scan lines */
|
||||
#define SFB_VID_VER_SL_MASK 0x7ff
|
||||
|
||||
#define BT459_ADR_LOW BT459_OFFSET + 0x00 /* addr. low */
|
||||
#define BT459_ADR_HIGH BT459_OFFSET + 0x04 /* addr. high */
|
||||
#define BT459_DATA BT459_OFFSET + 0x08 /* r/w data */
|
||||
#define BT459_CMAP BT459_OFFSET + 0x0C /* color map */
|
||||
/* Video base address register constants. All bits are r/w. */
|
||||
#define SFB_VID_BASE_MASK 0x1ff /* video base row address */
|
||||
|
||||
/* Bt459 register offsets, byte-wide registers. */
|
||||
#define BT459_ADDR_LO 0x0 /* address low */
|
||||
#define BT459_ADDR_HI 0x4 /* address high */
|
||||
#define BT459_DATA 0x8 /* data window register */
|
||||
#define BT459_CMAP 0xc /* color map window register */
|
||||
|
||||
Loading…
Reference in New Issue
Block a user