diff options
author | Ralf Baechle <ralf@linux-mips.org> | 2005-09-03 15:56:09 -0700 |
---|---|---|
committer | Linus Torvalds <torvalds@evo.osdl.org> | 2005-09-05 00:06:03 -0700 |
commit | af690a948cc545d1eca19acab23016b96e178dcf (patch) | |
tree | 74d3a6d343b877254add9081082ef7cbbe405d7d | |
parent | 61838ffeee8296de8bfee751e9ad67bf6c61d0b4 (diff) | |
download | linux-af690a948cc545d1eca19acab23016b96e178dcf.tar.bz2 |
[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>
-rw-r--r-- | drivers/video/pmag-ba-fb.c | 285 | ||||
-rw-r--r-- | include/video/pmag-ba-fb.h | 41 |
2 files changed, 205 insertions, 121 deletions
diff --git a/drivers/video/pmag-ba-fb.c b/drivers/video/pmag-ba-fb.c index f8095588e99d..c98f1c8d7dc2 100644 --- a/drivers/video/pmag-ba-fb.c +++ b/drivers/video/pmag-ba-fb.c @@ -1,57 +1,55 @@ /* - * linux/drivers/video/pmag-ba-fb.c + * linux/drivers/video/pmag-ba-fb.c * - * PMAG-BA TurboChannel framebuffer card support ... derived from: + * PMAG-BA TURBOchannel Color Frame Buffer (CFB) card support, + * derived from: * "HP300 Topcat framebuffer support (derived from macfb of all things) * Phil Blundell <philb@gnu.org> 1998", the original code can be - * found in the file hpfb.c in the same directory. + * found in the file hpfb.c in the same directory. * * Based on digital document: * "PMAG-BA TURBOchannel Color Frame Buffer * Functional Specification", Revision 1.2, August 27, 1990 * - * DECstation related code Copyright (C) 1999, 2000, 2001 by - * Michael Engel <engel@unix-ag.org>, - * Karsten Merker <merker@linuxtag.org> and + * DECstation related code Copyright (C) 1999, 2000, 2001 by + * Michael Engel <engel@unix-ag.org>, + * Karsten Merker <merker@linuxtag.org> and * Harald Koerfgen. - * 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. + * 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. */ -#include <linux/module.h> -#include <linux/kernel.h> -#include <linux/sched.h> + +#include <linux/compiler.h> #include <linux/errno.h> -#include <linux/string.h> -#include <linux/timer.h> -#include <linux/mm.h> -#include <linux/tty.h> -#include <linux/slab.h> -#include <linux/delay.h> -#include <linux/init.h> #include <linux/fb.h> -#include <asm/bootinfo.h> -#include <asm/dec/machtype.h> +#include <linux/init.h> +#include <linux/kernel.h> +#include <linux/module.h> +#include <linux/types.h> + +#include <asm/bug.h> +#include <asm/io.h> +#include <asm/system.h> + #include <asm/dec/tc.h> + #include <video/pmag-ba-fb.h> -struct pmag_ba_ramdac_regs { - unsigned char addr_low; - unsigned char pad0[3]; - unsigned char addr_hi; - unsigned char pad1[3]; - unsigned char data; - unsigned char pad2[3]; - unsigned char cmap; + +struct pmagbafb_par { + struct fb_info *next; + volatile void __iomem *mmio; + volatile u32 __iomem *dac; + int slot; }; -/* - * Max 3 TURBOchannel slots -> max 3 PMAG-BA :) - */ -static struct fb_info pmagba_fb_info[3]; -static struct fb_var_screeninfo pmagbafb_defined = { +static struct fb_info *root_pmagbafb_dev; + +static struct fb_var_screeninfo pmagbafb_defined __initdata = { .xres = 1024, .yres = 864, .xres_virtual = 1024, @@ -61,58 +59,71 @@ static struct fb_var_screeninfo pmagbafb_defined = { .green.length = 8, .blue.length = 8, .activate = FB_ACTIVATE_NOW, - .height = 274, - .width = 195, - .accel = FB_ACCEL_NONE, + .height = -1, + .width = -1, + .accel_flags = FB_ACCEL_NONE, + .pixclock = 14452, + .left_margin = 116, + .right_margin = 12, + .upper_margin = 34, + .lower_margin = 12, + .hsync_len = 128, + .vsync_len = 3, + .sync = FB_SYNC_ON_GREEN, .vmode = FB_VMODE_NONINTERLACED, }; -static struct fb_fix_screeninfo pmagbafb_fix = { +static struct fb_fix_screeninfo pmagbafb_fix __initdata = { .id = "PMAG-BA", - .smem_len = (1024 * 864), + .smem_len = (1024 * 1024), .type = FB_TYPE_PACKED_PIXELS, .visual = FB_VISUAL_PSEUDOCOLOR, .line_length = 1024, + .mmio_len = PMAG_BA_SIZE - PMAG_BA_BT459, }; -/* - * Turn hardware cursor off - */ -void pmagbafb_erase_cursor(struct pmag_ba_ramdac_regs *bt459_regs) + +static inline void dac_write(struct pmagbafb_par *par, unsigned int reg, u8 v) { - bt459_regs->addr_low = 0; - bt459_regs->addr_hi = 3; - bt459_regs->data = 0; + writeb(v, par->dac + reg / 4); } +static inline u8 dac_read(struct pmagbafb_par *par, unsigned int reg) +{ + return readb(par->dac + reg / 4); +} + + /* - * Set the palette. + * Set the palette. */ -static int pmagbafb_setcolreg(unsigned regno, unsigned red, unsigned green, - unsigned blue, unsigned transp, - struct fb_info *info) +static int pmagbafb_setcolreg(unsigned int regno, unsigned int red, + unsigned int green, unsigned int blue, + unsigned int transp, struct fb_info *info) { - struct pmag_ba_ramdac_regs *bt459_regs = (struct pmag_ba_ramdac_regs *) info->par; + struct pmagbafb_par *par = info->par; - if (regno >= info->cmap.len) - return 1; + BUG_ON(regno >= info->cmap.len); red >>= 8; /* The cmap fields are 16 bits */ - green >>= 8; /* wide, but the harware colormap */ + green >>= 8; /* wide, but the hardware colormap */ blue >>= 8; /* registers are only 8 bits wide */ - bt459_regs->addr_low = (__u8) regno; - bt459_regs->addr_hi = 0; - bt459_regs->cmap = red; - bt459_regs->cmap = green; - bt459_regs->cmap = blue; + mb(); + dac_write(par, BT459_ADDR_LO, regno); + dac_write(par, BT459_ADDR_HI, 0x00); + wmb(); + dac_write(par, BT459_CMAP, red); + wmb(); + dac_write(par, BT459_CMAP, green); + wmb(); + dac_write(par, BT459_CMAP, blue); + return 0; } static struct fb_ops pmagbafb_ops = { .owner = THIS_MODULE, - .fb_get_fix = gen_get_fix, - .fb_get_var = gen_get_var, .fb_setcolreg = pmagbafb_setcolreg, .fb_fillrect = cfb_fillrect, .fb_copyarea = cfb_copyarea, @@ -120,63 +131,133 @@ static struct fb_ops pmagbafb_ops = { .fb_cursor = soft_cursor, }; -int __init pmagbafb_init_one(int slot) + +/* + * Turn the hardware cursor off. + */ +static void __init pmagbafb_erase_cursor(struct fb_info *info) +{ + struct pmagbafb_par *par = info->par; + + mb(); + dac_write(par, BT459_ADDR_LO, 0x00); + dac_write(par, BT459_ADDR_HI, 0x03); + wmb(); + dac_write(par, BT459_DATA, 0x00); +} + + +static int __init pmagbafb_init_one(int slot) { - unsigned long base_addr = get_tc_base_addr(slot); - struct fb_info *info = &pmagba_fb_info[slot]; - struct display *disp = &pmagba_disp[slot]; - - printk("PMAG-BA framebuffer in slot %d\n", slot); - /* - * Framebuffer display memory base address and friends - */ - pmagbafb_fix.smem_start = base_addr + PMAG_BA_ONBOARD_FBMEM_OFFSET; - info->par = (base_addr + PMAG_BA_BT459_OFFSET); - - /* - * Configure the Bt459 RAM DAC - */ - pmagbafb_erase_cursor((struct pmag_ba_ramdac_regs *) info->par); - - /* - * Let there be consoles.. - */ + struct fb_info *info; + struct pmagbafb_par *par; + unsigned long base_addr; + + info = framebuffer_alloc(sizeof(struct pmagbafb_par), NULL); + if (!info) + return -ENOMEM; + + par = info->par; + par->slot = slot; + claim_tc_card(par->slot); + + base_addr = get_tc_base_addr(par->slot); + + par->next = root_pmagbafb_dev; + root_pmagbafb_dev = info; + + if (fb_alloc_cmap(&info->cmap, 256, 0) < 0) + goto err_alloc; + info->fbops = &pmagbafb_ops; + info->fix = pmagbafb_fix; info->var = pmagbafb_defined; - info->fix = pmagbafb_fix; - info->screen_base = pmagbafb_fix.smem_start; info->flags = FBINFO_DEFAULT; - fb_alloc_cmap(&fb_info.cmap, 256, 0); + /* MMIO mapping setup. */ + info->fix.mmio_start = base_addr; + par->mmio = ioremap_nocache(info->fix.mmio_start, info->fix.mmio_len); + if (!par->mmio) + goto err_cmap; + par->dac = par->mmio + PMAG_BA_BT459; + + /* Frame buffer mapping setup. */ + info->fix.smem_start = base_addr + PMAG_BA_FBMEM; + info->screen_base = ioremap_nocache(info->fix.smem_start, + info->fix.smem_len); + if (!info->screen_base) + goto err_mmio_map; + info->screen_size = info->fix.smem_len; + + pmagbafb_erase_cursor(info); if (register_framebuffer(info) < 0) - return 1; + goto err_smem_map; + + pr_info("fb%d: %s frame buffer device in slot %d\n", + info->node, info->fix.id, par->slot); + return 0; + + +err_smem_map: + iounmap(info->screen_base); + +err_mmio_map: + iounmap(par->mmio); + +err_cmap: + fb_dealloc_cmap(&info->cmap); + +err_alloc: + root_pmagbafb_dev = par->next; + release_tc_card(par->slot); + framebuffer_release(info); + return -ENXIO; } -/* - * Initialise the framebuffer - */ +static void __exit pmagbafb_exit_one(void) +{ + struct fb_info *info = root_pmagbafb_dev; + struct pmagbafb_par *par = info->par; -int __init pmagbafb_init(void) + unregister_framebuffer(info); + iounmap(info->screen_base); + iounmap(par->mmio); + fb_dealloc_cmap(&info->cmap); + root_pmagbafb_dev = par->next; + release_tc_card(par->slot); + framebuffer_release(info); +} + + +/* + * Initialise the framebuffer. + */ +static int __init pmagbafb_init(void) { - int sid; - int found = 0; + int count = 0; + int slot; if (fb_get_options("pmagbafb", NULL)) - return -ENODEV; - - if (TURBOCHANNEL) { - while ((sid = search_tc_card("PMAG-BA")) >= 0) { - found = 1; - claim_tc_card(sid); - pmagbafb_init_one(sid); - } - return found ? 0 : -ENODEV; - } else { - return -ENODEV; + return -ENXIO; + + while ((slot = search_tc_card("PMAG-BA")) >= 0) { + if (pmagbafb_init_one(slot) < 0) + break; + count++; } + return (count > 0) ? 0 : -ENXIO; } +static void __exit pmagbafb_exit(void) +{ + while (root_pmagbafb_dev) + pmagbafb_exit_one(); +} + + module_init(pmagbafb_init); +module_exit(pmagbafb_exit); + MODULE_LICENSE("GPL"); diff --git a/include/video/pmag-ba-fb.h b/include/video/pmag-ba-fb.h index cebef073b9a3..fceb6c0f6583 100644 --- a/include/video/pmag-ba-fb.h +++ b/include/video/pmag-ba-fb.h @@ -1,24 +1,27 @@ /* - * linux/drivers/video/pmag-ba-fb.h + * linux/include/video/pmag-ba-fb.h * - * TurboChannel PMAG-BA framebuffer card support, - * Copyright (C) 1999,2000,2001 by - * Michael Engel <engel@unix-ag.org>, - * 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. - */ - -/* - * Bt459 RAM DAC register base offset (rel. to TC slot base address) + * TURBOchannel PMAG-BA Color Frame Buffer (CFB) card support, + * Copyright (C) 1999, 2000, 2001 by + * Michael Engel <engel@unix-ag.org>, + * 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. */ -#define PMAG_BA_BT459_OFFSET 0x00200000 - -/* - * Begin of PMAG-BA framebuffer memory relative to TC slot address, - * resolution is 1024x864x8 - */ +/* IOmem resource offsets. */ +#define PMAG_BA_FBMEM 0x000000 /* frame buffer */ +#define PMAG_BA_BT459 0x200000 /* Bt459 RAMDAC */ +#define PMAG_BA_IRQ 0x300000 /* IRQ acknowledge */ +#define PMAG_BA_ROM 0x380000 /* REX option ROM */ +#define PMAG_BA_BT438 0x380000 /* Bt438 clock chip reset */ +#define PMAG_BA_SIZE 0x400000 /* address space size */ -#define PMAG_BA_ONBOARD_FBMEM_OFFSET 0x00000000 +/* 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 */ |