[linux.git] / drivers / video / g364fb.c

/* $Id: g364fb.c,v 1.3 1998/08/28 22:43:00 tsbogend Exp $
 *
 * linux/drivers/video/g364fb.c -- Mips Magnum frame buffer device
 *
 * (C) 1998 Thomas Bogendoerfer
 *
 *  This driver is based on tgafb.c
 *
 *	Copyright (C) 1997 Geert Uytterhoeven 
 *	Copyright (C) 1995  Jay Estabrook
 *
 *  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/console.h>
#include <linux/kernel.h>
#include <linux/errno.h>
#include <linux/string.h>
#include <linux/mm.h>
#include <linux/vmalloc.h>
#include <linux/delay.h>
#include <linux/interrupt.h>
#include <linux/fb.h>
#include <linux/init.h>
#include <asm/io.h>
#include <asm/jazz.h>

/* 
 * Various defines for the G364
 */
#define G364_MEM_BASE   0xe4400000
#define G364_PORT_BASE  0xe4000000
#define ID_REG 		0xe4000000	/* Read only */
#define BOOT_REG 	0xe4080000
#define TIMING_REG 	0xe4080108	/* to 0x080170 - DON'T TOUCH! */
#define DISPLAY_REG 	0xe4080118
#define VDISPLAY_REG 	0xe4080150
#define MASK_REG 	0xe4080200
#define CTLA_REG 	0xe4080300
#define CURS_TOGGLE 	0x800000
#define BIT_PER_PIX	0x700000	/* bits 22 to 20 of Control A */
#define DELAY_SAMPLE    0x080000
#define PORT_INTER	0x040000
#define PIX_PIPE_DEL	0x030000	/* bits 17 and 16 of Control A */
#define PIX_PIPE_DEL2	0x008000	/* same as above - don't ask me why */
#define TR_CYCLE_TOG	0x004000
#define VRAM_ADR_INC	0x003000	/* bits 13 and 12 of Control A */
#define BLANK_OFF	0x000800
#define FORCE_BLANK	0x000400
#define BLK_FUN_SWTCH	0x000200
#define BLANK_IO	0x000100
#define BLANK_LEVEL	0x000080
#define A_VID_FORM	0x000040
#define D_SYNC_FORM	0x000020
#define FRAME_FLY_PAT	0x000010
#define OP_MODE		0x000008
#define INTL_STAND	0x000004
#define SCRN_FORM	0x000002
#define ENABLE_VTG	0x000001
#define TOP_REG 	0xe4080400
#define CURS_PAL_REG 	0xe4080508	/* to 0x080518 */
#define CHKSUM_REG 	0xe4080600	/* to 0x080610 - unused */
#define CURS_POS_REG 	0xe4080638
#define CLR_PAL_REG 	0xe4080800	/* to 0x080ff8 */
#define CURS_PAT_REG 	0xe4081000	/* to 0x081ff8 */
#define MON_ID_REG 	0xe4100000	/* unused */
#define RESET_REG 	0xe4180000	/* Write only */

static struct fb_info fb_info;

static struct fb_fix_screeninfo fb_fix __initdata = {
	.id 		= "G364 8plane",
	.smem_start 	= 0x40000000,	/* physical address */
	.type 		= FB_TYPE_PACKED_PIXELS,
	.visual 	= FB_VISUAL_PSEUDOCOLOR,
	.ypanstep 	= 1,
	.accel 		= FB_ACCEL_NONE,
};

static struct fb_var_screeninfo fb_var __initdata = {
	.bits_per_pixel = 8,
	.red 		= { 0, 8, 0 },
      	.green 		= { 0, 8, 0 },
      	.blue		= { 0, 8, 0 },
      	.activate	= FB_ACTIVATE_NOW,
      	.height		= -1,
      	.width		= -1,
      	.pixclock	= 39722,
      	.left_margin	= 40,
      	.right_margin	= 24,
      	.upper_margin	= 32,
      	.lower_margin	= 11,
      	.hsync_len 	= 96,
      	.vsync_len 	= 2,
      	.vmode		= FB_VMODE_NONINTERLACED,
};

/*
 *  Interface used by the world
 */
int g364fb_init(void);

static int g364fb_pan_display(struct fb_var_screeninfo *var,
			      struct fb_info *info);
static int g364fb_setcolreg(u_int regno, u_int red, u_int green,
			    u_int blue, u_int transp,
			    struct fb_info *info);
static int g364fb_cursor(struct fb_info *info, struct fb_cursor *cursor);
static int g364fb_blank(int blank, struct fb_info *info);

static struct fb_ops g364fb_ops = {
	.owner		= THIS_MODULE,
	.fb_setcolreg	= g364fb_setcolreg,
	.fb_pan_display	= g364fb_pan_display,
	.fb_blank	= g364fb_blank,
	.fb_fillrect	= cfb_fillrect,
	.fb_copyarea	= cfb_copyarea,
	.fb_imageblit	= cfb_imageblit,
	.fb_cursor	= g364fb_cursor,
};

int g364fb_cursor(struct fb_info *info, struct fb_cursor *cursor)
{
	
	switch (cursor->enable) {
	case CM_ERASE:
		*(unsigned int *) CTLA_REG |= CURS_TOGGLE;
		break;

	case CM_MOVE:
	case CM_DRAW:
		*(unsigned int *) CTLA_REG &= ~CURS_TOGGLE;
		*(unsigned int *) CURS_POS_REG =
		    ((x * fontwidth(p)) << 12) | ((y * fontheight(p)) -
						  info->var.yoffset);
		break;
	}
	return 0;
}

/*
 *  Pan or Wrap the Display
 *
 *  This call looks only at xoffset, yoffset and the FB_VMODE_YWRAP flag
 */
static int g364fb_pan_display(struct fb_var_screeninfo *var, 
			      struct fb_info *info)
{
	if (var->xoffset ||
	    var->yoffset + info->var.yres > info->var.yres_virtual)
		return -EINVAL;

	*(unsigned int *) TOP_REG = var->yoffset * info->var.xres;
	return 0;
}

/*
 *  Blank the display.
 */
static int g364fb_blank(int blank, struct fb_info *info)
{
	if (blank)
		*(unsigned int *) CTLA_REG |= FORCE_BLANK;
	else
		*(unsigned int *) CTLA_REG &= ~FORCE_BLANK;
	return 0;
}

/*
 *  Set a single color register. Return != 0 for invalid regno.
 */
static int g364fb_setcolreg(u_int regno, u_int red, u_int green,
			    u_int blue, u_int transp, struct fb_info *info)
{
	volatile unsigned int *ptr = (volatile unsigned int *) CLR_PAL_REG;

	if (regno > 255)
		return 1;

	red >>= 8;
	green >>= 8;
	blue >>= 8;

	ptr[regno << 1] = (red << 16) | (green << 8) | blue;

	return 0;
}

/*
 *  Initialisation
 */
int __init g364fb_init(void)
{
	volatile unsigned int *pal_ptr =
	    (volatile unsigned int *) CLR_PAL_REG;
	volatile unsigned int *curs_pal_ptr =
	    (volatile unsigned int *) CURS_PAL_REG;
	int mem, i, j;

	if (fb_get_options("g364fb", NULL))
		return -ENODEV;

	/* TBD: G364 detection */

	/* get the resolution set by ARC console */
	*(volatile unsigned int *) CTLA_REG &= ~ENABLE_VTG;
	fb_var.xres =
	    (*((volatile unsigned int *) DISPLAY_REG) & 0x00ffffff) * 4;
	fb_var.yres =
	    (*((volatile unsigned int *) VDISPLAY_REG) & 0x00ffffff) / 2;
	*(volatile unsigned int *) CTLA_REG |= ENABLE_VTG;

	/* setup cursor */
	curs_pal_ptr[0] |= 0x00ffffff;
	curs_pal_ptr[2] |= 0x00ffffff;
	curs_pal_ptr[4] |= 0x00ffffff;

	/*
	 * first set the whole cursor to transparent
	 */
	for (i = 0; i < 512; i++)
		*(unsigned short *) (CURS_PAT_REG + i * 8) = 0;

	/*
	 * switch the last two lines to cursor palette 3
	 * we assume here, that FONTSIZE_X is 8
	 */
	*(unsigned short *) (CURS_PAT_REG + 14 * 64) = 0xffff;
	*(unsigned short *) (CURS_PAT_REG + 15 * 64) = 0xffff;
	fb_var.xres_virtual = fbvar.xres;
	fb_fix.line_length = (xres / 8) * fb_var.bits_per_pixel;
	fb_fix.smem_start = 0x40000000;	/* physical address */
	/* get size of video memory; this is special for the JAZZ hardware */
	mem = (r4030_read_reg32(JAZZ_R4030_CONFIG) >> 8) & 3;
	fb_fix.smem_len = (1 << (mem * 2)) * 512 * 1024;
	fb_var.yres_virtual = fb_fix.smem_len / fb_var.xres;

	fb_info.fbops = &g364fb_ops;
	fb_info.screen_base = (char *) G364_MEM_BASE;	/* virtual kernel address */
	fb_info.var = fb_var;
	fb_info.fix = fb_fix;
	fb_info.flags = FBINFO_DEFAULT | FBINFO_HWACCEL_YPAN;

	fb_alloc_cmap(&fb_info.cmap, 255, 0);

	if (register_framebuffer(&fb_info) < 0)
		return -EINVAL;
	return 0;
}

module_init(g364fb_init);
MODULE_LICENSE("GPL");
Commit	Line	Data
1da177e4 LT	1	/* $Id: g364fb.c,v 1.3 1998/08/28 22:43:00 tsbogend Exp $
	2	*
	3	* linux/drivers/video/g364fb.c -- Mips Magnum frame buffer device
	4	*
	5	* (C) 1998 Thomas Bogendoerfer
	6	*
	7	* This driver is based on tgafb.c
	8	*
	9	* Copyright (C) 1997 Geert Uytterhoeven
	10	* Copyright (C) 1995 Jay Estabrook
	11	*
	12	* This file is subject to the terms and conditions of the GNU General Public
	13	* License. See the file COPYING in the main directory of this archive for
	14	* more details.
	15	*/
	16
	17	#include <linux/module.h>
	18	#include <linux/console.h>
1da177e4 LT	19	#include <linux/kernel.h>
	20	#include <linux/errno.h>
	21	#include <linux/string.h>
	22	#include <linux/mm.h>
1da177e4 LT	23	#include <linux/vmalloc.h>
	24	#include <linux/delay.h>
	25	#include <linux/interrupt.h>
	26	#include <linux/fb.h>
	27	#include <linux/init.h>
1da177e4 LT	28	#include <asm/io.h>
	29	#include <asm/jazz.h>
	30
	31	/*
	32	* Various defines for the G364
	33	*/
	34	#define G364_MEM_BASE 0xe4400000
	35	#define G364_PORT_BASE 0xe4000000
	36	#define ID_REG 0xe4000000 /* Read only */
	37	#define BOOT_REG 0xe4080000
	38	#define TIMING_REG 0xe4080108 /* to 0x080170 - DON'T TOUCH! */
	39	#define DISPLAY_REG 0xe4080118
	40	#define VDISPLAY_REG 0xe4080150
	41	#define MASK_REG 0xe4080200
	42	#define CTLA_REG 0xe4080300
	43	#define CURS_TOGGLE 0x800000
	44	#define BIT_PER_PIX 0x700000 /* bits 22 to 20 of Control A */
	45	#define DELAY_SAMPLE 0x080000
	46	#define PORT_INTER 0x040000
	47	#define PIX_PIPE_DEL 0x030000 /* bits 17 and 16 of Control A */
	48	#define PIX_PIPE_DEL2 0x008000 /* same as above - don't ask me why */
	49	#define TR_CYCLE_TOG 0x004000
	50	#define VRAM_ADR_INC 0x003000 /* bits 13 and 12 of Control A */
	51	#define BLANK_OFF 0x000800
	52	#define FORCE_BLANK 0x000400
	53	#define BLK_FUN_SWTCH 0x000200
	54	#define BLANK_IO 0x000100
	55	#define BLANK_LEVEL 0x000080
	56	#define A_VID_FORM 0x000040
	57	#define D_SYNC_FORM 0x000020
	58	#define FRAME_FLY_PAT 0x000010
	59	#define OP_MODE 0x000008
	60	#define INTL_STAND 0x000004
	61	#define SCRN_FORM 0x000002
	62	#define ENABLE_VTG 0x000001
	63	#define TOP_REG 0xe4080400
	64	#define CURS_PAL_REG 0xe4080508 /* to 0x080518 */
	65	#define CHKSUM_REG 0xe4080600 /* to 0x080610 - unused */
	66	#define CURS_POS_REG 0xe4080638
	67	#define CLR_PAL_REG 0xe4080800 /* to 0x080ff8 */
	68	#define CURS_PAT_REG 0xe4081000 /* to 0x081ff8 */
	69	#define MON_ID_REG 0xe4100000 /* unused */
	70	#define RESET_REG 0xe4180000 /* Write only */
	71
	72	static struct fb_info fb_info;
	73
	74	static struct fb_fix_screeninfo fb_fix __initdata = {
	75	.id = "G364 8plane",
	76	.smem_start = 0x40000000, /* physical address */
	77	.type = FB_TYPE_PACKED_PIXELS,
	78	.visual = FB_VISUAL_PSEUDOCOLOR,
	79	.ypanstep = 1,
	80	.accel = FB_ACCEL_NONE,
	81	};
	82
	83	static struct fb_var_screeninfo fb_var __initdata = {
	84	.bits_per_pixel = 8,
	85	.red = { 0, 8, 0 },
	86	.green = { 0, 8, 0 },
	87	.blue = { 0, 8, 0 },
	88	.activate = FB_ACTIVATE_NOW,
	89	.height = -1,
	90	.width = -1,
	91	.pixclock = 39722,
92	.left_margin = 40,
93	.right_margin = 24,
94	.upper_margin = 32,
95	.lower_margin = 11,
96	.hsync_len = 96,
97	.vsync_len = 2,
98	.vmode = FB_VMODE_NONINTERLACED,
99	};
100
101	/*
102	* Interface used by the world
103	*/
104	int g364fb_init(void);
105
106	static int g364fb_pan_display(struct fb_var_screeninfo *var,
107	struct fb_info *info);
108	static int g364fb_setcolreg(u_int regno, u_int red, u_int green,
109	u_int blue, u_int transp,
110	struct fb_info *info);
111	static int g364fb_cursor(struct fb_info info, struct fb_cursor cursor);
112	static int g364fb_blank(int blank, struct fb_info *info);
113
114	static struct fb_ops g364fb_ops = {
115	.owner = THIS_MODULE,
116	.fb_setcolreg = g364fb_setcolreg,
117	.fb_pan_display = g364fb_pan_display,
118	.fb_blank = g364fb_blank,
119	.fb_fillrect = cfb_fillrect,
120	.fb_copyarea = cfb_copyarea,
121	.fb_imageblit = cfb_imageblit,
122	.fb_cursor = g364fb_cursor,
123	};
124
125	int g364fb_cursor(struct fb_info info, struct fb_cursor cursor)
126	{
127
128	switch (cursor->enable) {
129	case CM_ERASE:
130	(unsigned int ) CTLA_REG \|= CURS_TOGGLE;
131	break;
132
133	case CM_MOVE:
134	case CM_DRAW:
135	(unsigned int ) CTLA_REG &= ~CURS_TOGGLE;
136	(unsigned int ) CURS_POS_REG =
137	((x * fontwidth(p)) << 12) \| ((y * fontheight(p)) -
138	info->var.yoffset);
139	break;
140	}
141	return 0;
142	}
143
144	/*
145	* Pan or Wrap the Display
146	*
147	* This call looks only at xoffset, yoffset and the FB_VMODE_YWRAP flag
148	*/
149	static int g364fb_pan_display(struct fb_var_screeninfo *var,
150	struct fb_info *info)
151	{
d8344e09 LP	152	if (var->xoffset \|\|
d8344e09 LP	153	var->yoffset + info->var.yres > info->var.yres_virtual)
1da177e4 LT	154	return -EINVAL;
1da177e4 LT	155
d8344e09	156	(unsigned int ) TOP_REG = var->yoffset * info->var.xres;
1da177e4 LT	157	return 0;
	158	}
	159
	160	/*
	161	* Blank the display.
	162	*/
	163	static int g364fb_blank(int blank, struct fb_info *info)
	164	{
	165	if (blank)
	166	(unsigned int ) CTLA_REG \|= FORCE_BLANK;
	167	else
	168	(unsigned int ) CTLA_REG &= ~FORCE_BLANK;
	169	return 0;
	170	}
	171
	172	/*
	173	* Set a single color register. Return != 0 for invalid regno.
	174	*/
	175	static int g364fb_setcolreg(u_int regno, u_int red, u_int green,
	176	u_int blue, u_int transp, struct fb_info *info)
	177	{
	178	volatile unsigned int ptr = (volatile unsigned int ) CLR_PAL_REG;
	179
	180	if (regno > 255)
	181	return 1;
	182
	183	red >>= 8;
	184	green >>= 8;
	185	blue >>= 8;
	186
	187	ptr[regno << 1] = (red << 16) \| (green << 8) \| blue;
	188
	189	return 0;
	190	}
	191
	192	/*
	193	* Initialisation
	194	*/
	195	int __init g364fb_init(void)
	196	{
	197	volatile unsigned int *pal_ptr =
	198	(volatile unsigned int *) CLR_PAL_REG;
	199	volatile unsigned int *curs_pal_ptr =
	200	(volatile unsigned int *) CURS_PAL_REG;
	201	int mem, i, j;
	202
	203	if (fb_get_options("g364fb", NULL))
	204	return -ENODEV;
	205
	206	/* TBD: G364 detection */
	207
	208	/* get the resolution set by ARC console */
	209	(volatile unsigned int ) CTLA_REG &= ~ENABLE_VTG;
	210	fb_var.xres =
	211	(((volatile unsigned int ) DISPLAY_REG) & 0x00ffffff) * 4;
	212	fb_var.yres =
	213	(((volatile unsigned int ) VDISPLAY_REG) & 0x00ffffff) / 2;
	214	(volatile unsigned int ) CTLA_REG \|= ENABLE_VTG;
	215
	216	/* setup cursor */
	217	curs_pal_ptr[0] \|= 0x00ffffff;
	218	curs_pal_ptr[2] \|= 0x00ffffff;
	219	curs_pal_ptr[4] \|= 0x00ffffff;
	220
221	/*
222	* first set the whole cursor to transparent
223	*/
224	for (i = 0; i < 512; i++)
225	(unsigned short ) (CURS_PAT_REG + i * 8) = 0;
226
227	/*
228	* switch the last two lines to cursor palette 3
229	* we assume here, that FONTSIZE_X is 8
230	*/
231	(unsigned short ) (CURS_PAT_REG + 14 * 64) = 0xffff;
232	(unsigned short ) (CURS_PAT_REG + 15 * 64) = 0xffff;
233	fb_var.xres_virtual = fbvar.xres;
234	fb_fix.line_length = (xres / 8) * fb_var.bits_per_pixel;
235	fb_fix.smem_start = 0x40000000; /* physical address */
236	/* get size of video memory; this is special for the JAZZ hardware */
237	mem = (r4030_read_reg32(JAZZ_R4030_CONFIG) >> 8) & 3;
238	fb_fix.smem_len = (1 << (mem * 2)) * 512 * 1024;
239	fb_var.yres_virtual = fb_fix.smem_len / fb_var.xres;
240
241	fb_info.fbops = &g364fb_ops;
242	fb_info.screen_base = (char ) G364_MEM_BASE; / virtual kernel address */
243	fb_info.var = fb_var;
244	fb_info.fix = fb_fix;
245	fb_info.flags = FBINFO_DEFAULT \| FBINFO_HWACCEL_YPAN;
246
247	fb_alloc_cmap(&fb_info.cmap, 255, 0);
248
249	if (register_framebuffer(&fb_info) < 0)
250	return -EINVAL;
251	return 0;
252	}
253
254	module_init(g364fb_init);
255	MODULE_LICENSE("GPL");