Commit af690a94 authored by Ralf Baechle's avatar Ralf Baechle Committed by Linus Torvalds
Browse files

[PATCH] DEC PMAG BA frame buffer update 



Rewrite PMAG BA frame buffer driver for 2.6.

Acked-by: default avatarAntonino Daplas <adaplas@pol.net>
Signed-off-by: default avatarAndrew Morton <akpm@osdl.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@osdl.org>
parent 61838ffe

drivers/video/pmag-ba-fb.c

+183 −102
Original line number Diff line number Diff line 
/*

 *	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.
@@ -14,44 +15,41 @@ 
 *	Michael Engel <engel@unix-ag.org>,

 *	Karsten Merker <merker@linuxtag.org> and

 *	Harald Koerfgen.

 *	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.

 */

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)

{

	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

 * Turn the hardware cursor off.

 */

	pmagbafb_fix.smem_start = base_addr + PMAG_BA_ONBOARD_FBMEM_OFFSET;

	info->par = (base_addr + PMAG_BA_BT459_OFFSET);

static void __init pmagbafb_erase_cursor(struct fb_info *info)

{

	struct pmagbafb_par *par = info->par;



	/*

	 * Configure the Bt459 RAM DAC

	 */

	pmagbafb_erase_cursor((struct pmag_ba_ramdac_regs *) 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)

{

	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;



	/*

	 *      Let there be consoles..

	 */

	info->fbops = &pmagbafb_ops;

	info->var = pmagbafb_defined;

	info->fix = pmagbafb_fix;

	info->screen_base = pmagbafb_fix.smem_start;

	info->var = pmagbafb_defined;

	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;

}



static void __exit pmagbafb_exit_one(void)

{

	struct fb_info *info = root_pmagbafb_dev;

	struct pmagbafb_par *par = info->par;



	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

 * Initialise the framebuffer.

 */



int __init pmagbafb_init(void)

static int __init pmagbafb_init(void)

{

	int sid;

	int found = 0;

	int count = 0;

	int slot;



	if (fb_get_options("pmagbafb", NULL))

		return -ENODEV;

		return -ENXIO;



	if (TURBOCHANNEL) {

		while ((sid = search_tc_card("PMAG-BA")) >= 0) {

			found = 1;

			claim_tc_card(sid);

			pmagbafb_init_one(sid);

	while ((slot = search_tc_card("PMAG-BA")) >= 0) {

		if (pmagbafb_init_one(slot) < 0)

			break;

		count++;

	}

		return found ? 0 : -ENODEV;

	} else {

		return -ENODEV;

	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");

include/video/pmag-ba-fb.h

+22 −19
Original line number Diff line number Diff line 
/*

 *      linux/drivers/video/pmag-ba-fb.h

 *	linux/include/video/pmag-ba-fb.h

 *

 *      TurboChannel PMAG-BA framebuffer card support,

 *	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.

 */



/*

 * Bt459 RAM DAC register base offset (rel. to TC slot base address)

 */



#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 */