[mirror_ubuntu-jammy-kernel.git] / drivers / video / pmagb-b-fb.c

/*
 *	linux/drivers/video/pmagb-b-fb.c
 *
 *	PMAGB-B TURBOchannel Smart Frame Buffer (SFB) 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.
 *
 *	DECstation related code Copyright (C) 1999, 2000, 2001 by
 *	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/compiler.h>
#include <linux/delay.h>
#include <linux/errno.h>
#include <linux/fb.h>
#include <linux/init.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/types.h>

#include <asm/io.h>
#include <asm/system.h>

#include <asm/dec/tc.h>

#include <video/pmagb-b-fb.h>


struct pmagbbfb_par {
	struct fb_info *next;
	volatile void __iomem *mmio;
	volatile void __iomem *smem;
	volatile u32 __iomem *sfb;
	volatile u32 __iomem *dac;
	unsigned int osc0;
	unsigned int osc1;
	int slot;
};


static struct fb_info *root_pmagbbfb_dev;

static struct fb_var_screeninfo pmagbbfb_defined __initdata = {
	.bits_per_pixel	= 8,
	.red.length	= 8,
	.green.length	= 8,
	.blue.length	= 8,
	.activate	= FB_ACTIVATE_NOW,
	.height		= -1,
	.width		= -1,
	.accel_flags	= FB_ACCEL_NONE,
	.sync		= FB_SYNC_ON_GREEN,
	.vmode		= FB_VMODE_NONINTERLACED,
};

static struct fb_fix_screeninfo pmagbbfb_fix __initdata = {
	.id		= "PMAGB-BA",
	.smem_len	= (2048 * 1024),
	.type		= FB_TYPE_PACKED_PIXELS,
	.visual		= FB_VISUAL_PSEUDOCOLOR,
	.mmio_len	= PMAGB_B_FBMEM,
};


static inline void sfb_write(struct pmagbbfb_par *par, unsigned int reg, u32 v)
{
	writel(v, par->sfb + reg / 4);
}

static inline u32 sfb_read(struct pmagbbfb_par *par, unsigned int reg)
{
	return readl(par->sfb + reg / 4);
}

static inline void dac_write(struct pmagbbfb_par *par, unsigned int reg, u8 v)
{
	writeb(v, par->dac + reg / 4);
}

static inline u8 dac_read(struct pmagbbfb_par *par, unsigned int reg)
{
	return readb(par->dac + reg / 4);
}

static inline void gp0_write(struct pmagbbfb_par *par, u32 v)
{
	writel(v, par->mmio + PMAGB_B_GP0);
}


/*
 * Set the palette.
 */
static int pmagbbfb_setcolreg(unsigned int regno, unsigned int red,
			      unsigned int green, unsigned int blue,
			      unsigned int transp, struct fb_info *info)
{
	struct pmagbbfb_par *par = info->par;

	BUG_ON(regno >= info->cmap.len);

	red   >>= 8;	/* The cmap fields are 16 bits    */
	green >>= 8;	/* wide, but the hardware colormap */
	blue  >>= 8;	/* registers are only 8 bits wide */

	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 pmagbbfb_ops = {
	.owner		= THIS_MODULE,
	.fb_setcolreg	= pmagbbfb_setcolreg,
	.fb_fillrect	= cfb_fillrect,
	.fb_copyarea	= cfb_copyarea,
	.fb_imageblit	= cfb_imageblit,
};


/*
 * Turn the hardware cursor off.
 */
static void __init pmagbbfb_erase_cursor(struct fb_info *info)
{
	struct pmagbbfb_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);
}

/*
 * Set up screen parameters.
 */
static void __init pmagbbfb_screen_setup(struct fb_info *info)
{
	struct pmagbbfb_par *par = info->par;

	info->var.xres = ((sfb_read(par, SFB_REG_VID_HOR) >>
			   SFB_VID_HOR_PIX_SHIFT) & SFB_VID_HOR_PIX_MASK) * 4;
	info->var.xres_virtual = info->var.xres;
	info->var.yres = (sfb_read(par, SFB_REG_VID_VER) >>
			  SFB_VID_VER_SL_SHIFT) & SFB_VID_VER_SL_MASK;
	info->var.yres_virtual = info->var.yres;
	info->var.left_margin = ((sfb_read(par, SFB_REG_VID_HOR) >>
				  SFB_VID_HOR_BP_SHIFT) &
				 SFB_VID_HOR_BP_MASK) * 4;
	info->var.right_margin = ((sfb_read(par, SFB_REG_VID_HOR) >>
				   SFB_VID_HOR_FP_SHIFT) &
				  SFB_VID_HOR_FP_MASK) * 4;
	info->var.upper_margin = (sfb_read(par, SFB_REG_VID_VER) >>
				  SFB_VID_VER_BP_SHIFT) & SFB_VID_VER_BP_MASK;
	info->var.lower_margin = (sfb_read(par, SFB_REG_VID_VER) >>
				  SFB_VID_VER_FP_SHIFT) & SFB_VID_VER_FP_MASK;
	info->var.hsync_len = ((sfb_read(par, SFB_REG_VID_HOR) >>
				SFB_VID_HOR_SYN_SHIFT) &
			       SFB_VID_HOR_SYN_MASK) * 4;
	info->var.vsync_len = (sfb_read(par, SFB_REG_VID_VER) >>
			       SFB_VID_VER_SYN_SHIFT) & SFB_VID_VER_SYN_MASK;

	info->fix.line_length = info->var.xres;
};

/*
 * Determine oscillator configuration.
 */
static void __init pmagbbfb_osc_setup(struct fb_info *info)
{
	static unsigned int pmagbbfb_freqs[] __initdata = {
		130808, 119843, 104000, 92980, 74367, 72800,
		69197, 66000, 65000, 50350, 36000, 32000, 25175
	};
	struct pmagbbfb_par *par = info->par;
	u32 count0 = 8, count1 = 8, counttc = 16 * 256 + 8;
	u32 freq0, freq1, freqtc = get_tc_speed() / 250;
	int i, j;

	gp0_write(par, 0);				/* select Osc0 */
	for (j = 0; j < 16; j++) {
		mb();
		sfb_write(par, SFB_REG_TCCLK_COUNT, 0);
		mb();
		for (i = 0; i < 100; i++) {	/* nominally max. 20.5us */
			if (sfb_read(par, SFB_REG_TCCLK_COUNT) == 0)
				break;
			udelay(1);
		}
		count0 += sfb_read(par, SFB_REG_VIDCLK_COUNT);
	}

	gp0_write(par, 1);				/* select Osc1 */
	for (j = 0; j < 16; j++) {
		mb();
		sfb_write(par, SFB_REG_TCCLK_COUNT, 0);

		for (i = 0; i < 100; i++) {	/* nominally max. 20.5us */
			if (sfb_read(par, SFB_REG_TCCLK_COUNT) == 0)
				break;
			udelay(1);
		}
		count1 += sfb_read(par, SFB_REG_VIDCLK_COUNT);
	}

	freq0 = (freqtc * count0 + counttc / 2) / counttc;
	par->osc0 = freq0;
	if (freq0 >= pmagbbfb_freqs[0] - (pmagbbfb_freqs[0] + 32) / 64 &&
	    freq0 <= pmagbbfb_freqs[0] + (pmagbbfb_freqs[0] + 32) / 64)
		par->osc0 = pmagbbfb_freqs[0];

	freq1 = (par->osc0 * count1 + count0 / 2) / count0;
	par->osc1 = freq1;
	for (i = 0; i < ARRAY_SIZE(pmagbbfb_freqs); i++)
		if (freq1 >= pmagbbfb_freqs[i] -
			     (pmagbbfb_freqs[i] + 128) / 256 &&
		    freq1 <= pmagbbfb_freqs[i] +
			     (pmagbbfb_freqs[i] + 128) / 256) {
			par->osc1 = pmagbbfb_freqs[i];
			break;
		}

	if (par->osc0 - par->osc1 <= (par->osc0 + par->osc1 + 256) / 512 ||
	    par->osc1 - par->osc0 <= (par->osc0 + par->osc1 + 256) / 512)
		par->osc1 = 0;

	gp0_write(par, par->osc1 != 0);			/* reselect OscX */

	info->var.pixclock = par->osc1 ?
			     (1000000000 + par->osc1 / 2) / par->osc1 :
			     (1000000000 + par->osc0 / 2) / par->osc0;
};


static int __init pmagbbfb_init_one(int slot)
{
	char freq0[12], freq1[12];
	struct fb_info *info;
	struct pmagbbfb_par *par;
	unsigned long base_addr;
	u32 vid_base;

	info = framebuffer_alloc(sizeof(struct pmagbbfb_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_pmagbbfb_dev;
	root_pmagbbfb_dev = info;

	if (fb_alloc_cmap(&info->cmap, 256, 0) < 0)
		goto err_alloc;

	info->fbops = &pmagbbfb_ops;
	info->fix = pmagbbfb_fix;
	info->var = pmagbbfb_defined;
	info->flags = FBINFO_DEFAULT;

	/* 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->sfb = par->mmio + PMAGB_B_SFB;
	par->dac = par->mmio + PMAGB_B_BT459;

	/* Frame buffer mapping setup.  */
	info->fix.smem_start = base_addr + PMAGB_B_FBMEM;
	par->smem = ioremap_nocache(info->fix.smem_start, info->fix.smem_len);
	if (!par->smem)
		goto err_mmio_map;
	vid_base = sfb_read(par, SFB_REG_VID_BASE);
	info->screen_base = (void __iomem *)par->smem + vid_base * 0x1000;
	info->screen_size = info->fix.smem_len - 2 * vid_base * 0x1000;

	pmagbbfb_erase_cursor(info);
	pmagbbfb_screen_setup(info);
	pmagbbfb_osc_setup(info);

	if (register_framebuffer(info) < 0)
		goto err_smem_map;

	snprintf(freq0, sizeof(freq0), "%u.%03uMHz",
		 par->osc0 / 1000, par->osc0 % 1000);
	snprintf(freq1, sizeof(freq1), "%u.%03uMHz",
		 par->osc1 / 1000, par->osc1 % 1000);

	pr_info("fb%d: %s frame buffer device in slot %d\n",
		info->node, info->fix.id, par->slot);
	pr_info("fb%d: Osc0: %s, Osc1: %s, Osc%u selected\n",
		info->node, freq0, par->osc1 ? freq1 : "disabled",
		par->osc1 != 0);

	return 0;


err_smem_map:
	iounmap(par->smem);

err_mmio_map:
	iounmap(par->mmio);

err_cmap:
	fb_dealloc_cmap(&info->cmap);

err_alloc:
	root_pmagbbfb_dev = par->next;
	release_tc_card(par->slot);
	framebuffer_release(info);
	return -ENXIO;
}

static void __exit pmagbbfb_exit_one(void)
{
	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 -ENXIO;

	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");
Commit	Line	Data
1da177e4	1	/*
7901c799	2	* linux/drivers/video/pmagb-b-fb.c
1da177e4	3	*
7901c799 RB	4	* PMAGB-B TURBOchannel Smart Frame Buffer (SFB) card support,
7901c799 RB	5	* derived from:
1da177e4 LT	6	* "HP300 Topcat framebuffer support (derived from macfb of all things)
1da177e4 LT	7	* Phil Blundell <philb@gnu.org> 1998", the original code can be
7901c799	8	* found in the file hpfb.c in the same directory.
1da177e4	9	*
7901c799 RB	10	* DECstation related code Copyright (C) 1999, 2000, 2001 by
	11	* Michael Engel <engel@unix-ag.org>,
	12	* Karsten Merker <merker@linuxtag.org> and
1da177e4	13	* Harald Koerfgen.
7901c799	14	* Copyright (c) 2005 Maciej W. Rozycki
1da177e4	15	*
7901c799 RB	16	* This file is subject to the terms and conditions of the GNU General
	17	* Public License. See the file COPYING in the main directory of this
	18	* archive for more details.
1da177e4 LT	19	*/
1da177e4 LT	20
7901c799	21	#include <linux/compiler.h>
1da177e4	22	#include <linux/delay.h>
7901c799	23	#include <linux/errno.h>
1da177e4	24	#include <linux/fb.h>
7901c799 RB	25	#include <linux/init.h>
	26	#include <linux/kernel.h>
	27	#include <linux/module.h>
	28	#include <linux/types.h>
	29
7901c799 RB	30	#include <asm/io.h>
	31	#include <asm/system.h>
	32
1da177e4	33	#include <asm/dec/tc.h>
7901c799	34
1da177e4 LT	35	#include <video/pmagb-b-fb.h>
1da177e4 LT	36
7901c799 RB	37
	38	struct pmagbbfb_par {
	39	struct fb_info *next;
	40	volatile void __iomem *mmio;
	41	volatile void __iomem *smem;
	42	volatile u32 __iomem *sfb;
	43	volatile u32 __iomem *dac;
	44	unsigned int osc0;
	45	unsigned int osc1;
	46	int slot;
1da177e4 LT	47	};
1da177e4 LT	48
1da177e4	49
7901c799 RB	50	static struct fb_info *root_pmagbbfb_dev;
	51
	52	static struct fb_var_screeninfo pmagbbfb_defined __initdata = {
1da177e4 LT	53	.bits_per_pixel = 8,
	54	.red.length = 8,
	55	.green.length = 8,
	56	.blue.length = 8,
	57	.activate = FB_ACTIVATE_NOW,
7901c799 RB	58	.height = -1,
7901c799 RB	59	.width = -1,
1da177e4	60	.accel_flags = FB_ACCEL_NONE,
7901c799	61	.sync = FB_SYNC_ON_GREEN,
1da177e4 LT	62	.vmode = FB_VMODE_NONINTERLACED,
	63	};
	64
7901c799	65	static struct fb_fix_screeninfo pmagbbfb_fix __initdata = {
1da177e4	66	.id = "PMAGB-BA",
7901c799	67	.smem_len = (2048 * 1024),
1da177e4 LT	68	.type = FB_TYPE_PACKED_PIXELS,
1da177e4 LT	69	.visual = FB_VISUAL_PSEUDOCOLOR,
7901c799 RB	70	.mmio_len = PMAGB_B_FBMEM,
	71	};
	72
	73
	74	static inline void sfb_write(struct pmagbbfb_par *par, unsigned int reg, u32 v)
	75	{
	76	writel(v, par->sfb + reg / 4);
1da177e4 LT	77	}
1da177e4 LT	78
7901c799 RB	79	static inline u32 sfb_read(struct pmagbbfb_par *par, unsigned int reg)
	80	{
	81	return readl(par->sfb + reg / 4);
	82	}
	83
	84	static inline void dac_write(struct pmagbbfb_par *par, unsigned int reg, u8 v)
1da177e4	85	{
7901c799	86	writeb(v, par->dac + reg / 4);
1da177e4 LT	87	}
1da177e4 LT	88
7901c799 RB	89	static inline u8 dac_read(struct pmagbbfb_par *par, unsigned int reg)
	90	{
	91	return readb(par->dac + reg / 4);
	92	}
	93
	94	static inline void gp0_write(struct pmagbbfb_par *par, u32 v)
	95	{
	96	writel(v, par->mmio + PMAGB_B_GP0);
	97	}
	98
	99
1da177e4	100	/*
7901c799	101	* Set the palette.
1da177e4	102	*/
7901c799 RB	103	static int pmagbbfb_setcolreg(unsigned int regno, unsigned int red,
	104	unsigned int green, unsigned int blue,
	105	unsigned int transp, struct fb_info *info)
1da177e4	106	{
7901c799 RB	107	struct pmagbbfb_par *par = info->par;
	108
	109	BUG_ON(regno >= info->cmap.len);
1da177e4 LT	110
1da177e4 LT	111	red >>= 8; /* The cmap fields are 16 bits */
7901c799	112	green >>= 8; /* wide, but the hardware colormap */
1da177e4 LT	113	blue >>= 8; /* registers are only 8 bits wide */
1da177e4 LT	114
7901c799 RB	115	mb();
	116	dac_write(par, BT459_ADDR_LO, regno);
	117	dac_write(par, BT459_ADDR_HI, 0x00);
	118	wmb();
	119	dac_write(par, BT459_CMAP, red);
	120	wmb();
	121	dac_write(par, BT459_CMAP, green);
	122	wmb();
	123	dac_write(par, BT459_CMAP, blue);
	124
1da177e4 LT	125	return 0;
	126	}
	127
	128	static struct fb_ops pmagbbfb_ops = {
	129	.owner = THIS_MODULE,
	130	.fb_setcolreg = pmagbbfb_setcolreg,
	131	.fb_fillrect = cfb_fillrect,
	132	.fb_copyarea = cfb_copyarea,
	133	.fb_imageblit = cfb_imageblit,
1da177e4 LT	134	};
1da177e4 LT	135
7901c799 RB	136
	137	/*
	138	* Turn the hardware cursor off.
	139	*/
	140	static void __init pmagbbfb_erase_cursor(struct fb_info *info)
	141	{
	142	struct pmagbbfb_par *par = info->par;
	143
	144	mb();
	145	dac_write(par, BT459_ADDR_LO, 0x00);
	146	dac_write(par, BT459_ADDR_HI, 0x03);
	147	wmb();
	148	dac_write(par, BT459_DATA, 0x00);
	149	}
	150
	151	/*
	152	* Set up screen parameters.
	153	*/
	154	static void __init pmagbbfb_screen_setup(struct fb_info *info)
	155	{
	156	struct pmagbbfb_par *par = info->par;
	157
	158	info->var.xres = ((sfb_read(par, SFB_REG_VID_HOR) >>
	159	SFB_VID_HOR_PIX_SHIFT) & SFB_VID_HOR_PIX_MASK) * 4;
	160	info->var.xres_virtual = info->var.xres;
	161	info->var.yres = (sfb_read(par, SFB_REG_VID_VER) >>
	162	SFB_VID_VER_SL_SHIFT) & SFB_VID_VER_SL_MASK;
	163	info->var.yres_virtual = info->var.yres;
	164	info->var.left_margin = ((sfb_read(par, SFB_REG_VID_HOR) >>
	165	SFB_VID_HOR_BP_SHIFT) &
	166	SFB_VID_HOR_BP_MASK) * 4;
	167	info->var.right_margin = ((sfb_read(par, SFB_REG_VID_HOR) >>
	168	SFB_VID_HOR_FP_SHIFT) &
	169	SFB_VID_HOR_FP_MASK) * 4;
	170	info->var.upper_margin = (sfb_read(par, SFB_REG_VID_VER) >>
	171	SFB_VID_VER_BP_SHIFT) & SFB_VID_VER_BP_MASK;
	172	info->var.lower_margin = (sfb_read(par, SFB_REG_VID_VER) >>
	173	SFB_VID_VER_FP_SHIFT) & SFB_VID_VER_FP_MASK;
	174	info->var.hsync_len = ((sfb_read(par, SFB_REG_VID_HOR) >>
	175	SFB_VID_HOR_SYN_SHIFT) &
	176	SFB_VID_HOR_SYN_MASK) * 4;
	177	info->var.vsync_len = (sfb_read(par, SFB_REG_VID_VER) >>
	178	SFB_VID_VER_SYN_SHIFT) & SFB_VID_VER_SYN_MASK;
	179
	180	info->fix.line_length = info->var.xres;
	181	};
	182
	183	/*
	184	* Determine oscillator configuration.
	185	*/
	186	static void __init pmagbbfb_osc_setup(struct fb_info *info)
1da177e4	187	{
7901c799 RB	188	static unsigned int pmagbbfb_freqs[] __initdata = {
	189	130808, 119843, 104000, 92980, 74367, 72800,
	190	69197, 66000, 65000, 50350, 36000, 32000, 25175
	191	};
	192	struct pmagbbfb_par *par = info->par;
	193	u32 count0 = 8, count1 = 8, counttc = 16 * 256 + 8;
	194	u32 freq0, freq1, freqtc = get_tc_speed() / 250;
	195	int i, j;
	196
	197	gp0_write(par, 0); /* select Osc0 */
	198	for (j = 0; j < 16; j++) {
	199	mb();
	200	sfb_write(par, SFB_REG_TCCLK_COUNT, 0);
	201	mb();
	202	for (i = 0; i < 100; i++) { /* nominally max. 20.5us */
	203	if (sfb_read(par, SFB_REG_TCCLK_COUNT) == 0)
	204	break;
	205	udelay(1);
	206	}
	207	count0 += sfb_read(par, SFB_REG_VIDCLK_COUNT);
	208	}
	209
	210	gp0_write(par, 1); /* select Osc1 */
	211	for (j = 0; j < 16; j++) {
	212	mb();
	213	sfb_write(par, SFB_REG_TCCLK_COUNT, 0);
	214
	215	for (i = 0; i < 100; i++) { /* nominally max. 20.5us */
	216	if (sfb_read(par, SFB_REG_TCCLK_COUNT) == 0)
	217	break;
	218	udelay(1);
	219	}
	220	count1 += sfb_read(par, SFB_REG_VIDCLK_COUNT);
	221	}
	222
	223	freq0 = (freqtc * count0 + counttc / 2) / counttc;
	224	par->osc0 = freq0;
	225	if (freq0 >= pmagbbfb_freqs[0] - (pmagbbfb_freqs[0] + 32) / 64 &&
	226	freq0 <= pmagbbfb_freqs[0] + (pmagbbfb_freqs[0] + 32) / 64)
	227	par->osc0 = pmagbbfb_freqs[0];
	228
	229	freq1 = (par->osc0 * count1 + count0 / 2) / count0;
	230	par->osc1 = freq1;
d1ae418e	231	for (i = 0; i < ARRAY_SIZE(pmagbbfb_freqs); i++)
7901c799 RB	232	if (freq1 >= pmagbbfb_freqs[i] -
	233	(pmagbbfb_freqs[i] + 128) / 256 &&
	234	freq1 <= pmagbbfb_freqs[i] +
	235	(pmagbbfb_freqs[i] + 128) / 256) {
	236	par->osc1 = pmagbbfb_freqs[i];
	237	break;
	238	}
	239
	240	if (par->osc0 - par->osc1 <= (par->osc0 + par->osc1 + 256) / 512 \|\|
	241	par->osc1 - par->osc0 <= (par->osc0 + par->osc1 + 256) / 512)
	242	par->osc1 = 0;
	243
	244	gp0_write(par, par->osc1 != 0); /* reselect OscX */
	245
	246	info->var.pixclock = par->osc1 ?
	247	(1000000000 + par->osc1 / 2) / par->osc1 :
	248	(1000000000 + par->osc0 / 2) / par->osc0;
	249	};
	250
	251
	252	static int __init pmagbbfb_init_one(int slot)
	253	{
	254	char freq0[12], freq1[12];
	255	struct fb_info *info;
	256	struct pmagbbfb_par *par;
	257	unsigned long base_addr;
	258	u32 vid_base;
	259
	260	info = framebuffer_alloc(sizeof(struct pmagbbfb_par), NULL);
	261	if (!info)
	262	return -ENOMEM;
	263
	264	par = info->par;
	265	par->slot = slot;
	266	claim_tc_card(par->slot);
	267
	268	base_addr = get_tc_base_addr(par->slot);
	269
	270	par->next = root_pmagbbfb_dev;
	271	root_pmagbbfb_dev = info;
	272
	273	if (fb_alloc_cmap(&info->cmap, 256, 0) < 0)
	274	goto err_alloc;
	275
1da177e4	276	info->fbops = &pmagbbfb_ops;
1da177e4	277	info->fix = pmagbbfb_fix;
7901c799	278	info->var = pmagbbfb_defined;
1da177e4 LT	279	info->flags = FBINFO_DEFAULT;
1da177e4 LT	280
7901c799 RB	281	/* MMIO mapping setup. */
	282	info->fix.mmio_start = base_addr;
	283	par->mmio = ioremap_nocache(info->fix.mmio_start, info->fix.mmio_len);
	284	if (!par->mmio)
	285	goto err_cmap;
	286	par->sfb = par->mmio + PMAGB_B_SFB;
	287	par->dac = par->mmio + PMAGB_B_BT459;
	288
	289	/* Frame buffer mapping setup. */
	290	info->fix.smem_start = base_addr + PMAGB_B_FBMEM;
	291	par->smem = ioremap_nocache(info->fix.smem_start, info->fix.smem_len);
	292	if (!par->smem)
	293	goto err_mmio_map;
	294	vid_base = sfb_read(par, SFB_REG_VID_BASE);
	295	info->screen_base = (void __iomem )par->smem + vid_base 0x1000;
	296	info->screen_size = info->fix.smem_len - 2 * vid_base * 0x1000;
	297
	298	pmagbbfb_erase_cursor(info);
	299	pmagbbfb_screen_setup(info);
	300	pmagbbfb_osc_setup(info);
1da177e4 LT	301
1da177e4 LT	302	if (register_framebuffer(info) < 0)
7901c799 RB	303	goto err_smem_map;
	304
	305	snprintf(freq0, sizeof(freq0), "%u.%03uMHz",
	306	par->osc0 / 1000, par->osc0 % 1000);
	307	snprintf(freq1, sizeof(freq1), "%u.%03uMHz",
	308	par->osc1 / 1000, par->osc1 % 1000);
	309
	310	pr_info("fb%d: %s frame buffer device in slot %d\n",
	311	info->node, info->fix.id, par->slot);
	312	pr_info("fb%d: Osc0: %s, Osc1: %s, Osc%u selected\n",
	313	info->node, freq0, par->osc1 ? freq1 : "disabled",
	314	par->osc1 != 0);
	315
1da177e4	316	return 0;
7901c799 RB	317
	318
	319	err_smem_map:
	320	iounmap(par->smem);
	321
	322	err_mmio_map:
	323	iounmap(par->mmio);
	324
	325	err_cmap:
	326	fb_dealloc_cmap(&info->cmap);
	327
	328	err_alloc:
	329	root_pmagbbfb_dev = par->next;
	330	release_tc_card(par->slot);
	331	framebuffer_release(info);
	332	return -ENXIO;
1da177e4 LT	333	}
1da177e4 LT	334
7901c799 RB	335	static void __exit pmagbbfb_exit_one(void)
	336	{
	337	struct fb_info *info = root_pmagbbfb_dev;
	338	struct pmagbbfb_par *par = info->par;
	339
	340	unregister_framebuffer(info);
	341	iounmap(par->smem);
	342	iounmap(par->mmio);
	343	fb_dealloc_cmap(&info->cmap);
	344	root_pmagbbfb_dev = par->next;
	345	release_tc_card(par->slot);
	346	framebuffer_release(info);
	347	}
1da177e4	348
7901c799 RB	349
	350	/*
	351	* Initialise the framebuffer.
	352	*/
	353	static int __init pmagbbfb_init(void)
1da177e4	354	{
7901c799 RB	355	int count = 0;
7901c799 RB	356	int slot;
1da177e4 LT	357
1da177e4 LT	358	if (fb_get_options("pmagbbfb", NULL))
7901c799	359	return -ENXIO;
1da177e4	360
7901c799 RB	361	while ((slot = search_tc_card("PMAGB-BA")) >= 0) {
	362	if (pmagbbfb_init_one(slot) < 0)
	363	break;
	364	count++;
1da177e4	365	}
7901c799 RB	366	return (count > 0) ? 0 : -ENXIO;
	367	}
	368
	369	static void __exit pmagbbfb_exit(void)
	370	{
	371	while (root_pmagbbfb_dev)
	372	pmagbbfb_exit_one();
1da177e4 LT	373	}
1da177e4 LT	374
7901c799	375
1da177e4	376	module_init(pmagbbfb_init);
7901c799 RB	377	module_exit(pmagbbfb_exit);
7901c799 RB	378
1da177e4	379	MODULE_LICENSE("GPL");