[net-next-2.6.git] / drivers / video / aty / mach64_cursor.c

/*
 *  ATI Mach64 CT/VT/GT/LT Cursor Support
 */

#include <linux/fb.h>
#include <linux/init.h>
#include <linux/string.h>

#include <asm/io.h>

#ifdef __sparc__
#include <asm/fbio.h>
#endif

#include <video/mach64.h>
#include "atyfb.h"

/*
 * The hardware cursor definition requires 2 bits per pixel. The
 * Cursor size reguardless of the visible cursor size is 64 pixels
 * by 64 lines. The total memory required to define the cursor is
 * 16 bytes / line for 64 lines or 1024 bytes of data. The data
 * must be in a contigiuos format. The 2 bit cursor code values are
 * as follows:
 *
 *	00 - pixel colour = CURSOR_CLR_0
 *	01 - pixel colour = CURSOR_CLR_1
 *	10 - pixel colour = transparent (current display pixel)
 *	11 - pixel colour = 1's complement of current display pixel
 *
 *	Cursor Offset        64 pixels		 Actual Displayed Area
 *            \_________________________/
 *	      |			|	|	|
 *	      |<--------------->|	|	|
 *	      | CURS_HORZ_OFFSET|	|	|
 *	      |			|_______|	|  64 Lines
 *	      |			   ^	|	|
 *	      |			   |	|	|
 *	      |		CURS_VERT_OFFSET|	|
 *	      |			   |	|	|
 *	      |____________________|____|	|
 *
 *
 * The Screen position of the top left corner of the displayed
 * cursor is specificed by CURS_HORZ_VERT_POSN. Care must be taken
 * when the cursor hot spot is not the top left corner and the
 * physical cursor position becomes negative. It will be be displayed
 * if either the horizontal or vertical cursor position is negative
 *
 * If x becomes negative the cursor manager must adjust the CURS_HORZ_OFFSET
 * to a larger number and saturate CUR_HORZ_POSN to zero.
 *
 * if Y becomes negative, CUR_VERT_OFFSET must be adjusted to a larger number,
 * CUR_OFFSET must be adjusted to a point to the appropraite line in the cursor
 * definitation and CUR_VERT_POSN must be saturated to zero.
 */

    /*
     *  Hardware Cursor support.
     */
static const u8 cursor_bits_lookup[16] = {
	0x00, 0x40, 0x10, 0x50, 0x04, 0x44, 0x14, 0x54,
	0x01, 0x41, 0x11, 0x51, 0x05, 0x45, 0x15, 0x55
};

static int atyfb_cursor(struct fb_info *info, struct fb_cursor *cursor)
{
	struct atyfb_par *par = (struct atyfb_par *) info->par;
	u16 xoff, yoff;
	int x, y, h;

#ifdef __sparc__
	if (par->mmaped)
		return -EPERM;
#endif
	if (par->asleep)
		return -EPERM;

	wait_for_fifo(1, par);
	if (cursor->enable)
		aty_st_le32(GEN_TEST_CNTL, aty_ld_le32(GEN_TEST_CNTL, par)
			    | HWCURSOR_ENABLE, par);
	else
		aty_st_le32(GEN_TEST_CNTL, aty_ld_le32(GEN_TEST_CNTL, par)
				& ~HWCURSOR_ENABLE, par);

	/* set position */
	if (cursor->set & FB_CUR_SETPOS) {
		x = cursor->image.dx - cursor->hot.x - info->var.xoffset;
		if (x < 0) {
			xoff = -x;
			x = 0;
		} else {
			xoff = 0;
		}

		y = cursor->image.dy - cursor->hot.y - info->var.yoffset;
		if (y < 0) {
			yoff = -y;
			y = 0;
		} else {
			yoff = 0;
		}

		h = cursor->image.height;

		/*
		 * In doublescan mode, the cursor location
		 * and heigh also needs to be doubled.
		 */
                if (par->crtc.gen_cntl & CRTC_DBL_SCAN_EN) {
			y<<=1;
			h<<=1;
		}
		wait_for_fifo(3, par);
		aty_st_le32(CUR_OFFSET, (info->fix.smem_len >> 3) + (yoff << 1), par);
		aty_st_le32(CUR_HORZ_VERT_OFF,
			    ((u32) (64 - h + yoff) << 16) | xoff, par);
		aty_st_le32(CUR_HORZ_VERT_POSN, ((u32) y << 16) | x, par);
	}

	/* Set color map */
	if (cursor->set & FB_CUR_SETCMAP) {
		u32 fg_idx, bg_idx, fg, bg;

		fg_idx = cursor->image.fg_color;
		bg_idx = cursor->image.bg_color;

		fg = ((info->cmap.red[fg_idx] & 0xff) << 24) |
		     ((info->cmap.green[fg_idx] & 0xff) << 16) |
		     ((info->cmap.blue[fg_idx] & 0xff) << 8) | 0xff;

		bg = ((info->cmap.red[bg_idx] & 0xff) << 24) |
		     ((info->cmap.green[bg_idx] & 0xff) << 16) |
		     ((info->cmap.blue[bg_idx] & 0xff) << 8);

		wait_for_fifo(2, par);
		aty_st_le32(CUR_CLR0, bg, par);
		aty_st_le32(CUR_CLR1, fg, par);
	}

	if (cursor->set & (FB_CUR_SETSHAPE | FB_CUR_SETIMAGE)) {
	    u8 *src = (u8 *)cursor->image.data;
	    u8 *msk = (u8 *)cursor->mask;
	    u8 __iomem *dst = (u8 __iomem *)info->sprite.addr;
	    unsigned int width = (cursor->image.width + 7) >> 3;
	    unsigned int height = cursor->image.height;
	    unsigned int align = info->sprite.scan_align;

	    unsigned int i, j, offset;
	    u8 m, b;

	    // Clear cursor image with 1010101010...
	    fb_memset(dst, 0xaa, 1024);

	    offset = align - width*2;

	    for (i = 0; i < height; i++) {
		for (j = 0; j < width; j++) {
			b = *src++;
			m = *msk++;
			switch (cursor->rop) {
			case ROP_XOR:
			    // Upper 4 bits of mask data
			    fb_writeb(cursor_bits_lookup[(b ^ m) >> 4], dst++);
			    // Lower 4 bits of mask
			    fb_writeb(cursor_bits_lookup[(b ^ m) & 0x0f],
				      dst++);
			    break;
			case ROP_COPY:
			    // Upper 4 bits of mask data
			    fb_writeb(cursor_bits_lookup[(b & m) >> 4], dst++);
			    // Lower 4 bits of mask
			    fb_writeb(cursor_bits_lookup[(b & m) & 0x0f],
				      dst++);
			    break;
			}
		}
		dst += offset;
	    }
	}

	return 0;
}

int __devinit aty_init_cursor(struct fb_info *info)
{
	unsigned long addr;

	info->fix.smem_len -= PAGE_SIZE;

#ifdef __sparc__
	addr = (unsigned long) info->screen_base - 0x800000 + info->fix.smem_len;
	info->sprite.addr = (u8 *) addr;
#else
#ifdef __BIG_ENDIAN
	addr = info->fix.smem_start - 0x800000 + info->fix.smem_len;
	info->sprite.addr = (u8 *) ioremap(addr, 1024);
#else
	addr = (unsigned long) info->screen_base + info->fix.smem_len;
	info->sprite.addr = (u8 *) addr;
#endif
#endif
	if (!info->sprite.addr)
		return -ENXIO;
	info->sprite.size = PAGE_SIZE;
	info->sprite.scan_align = 16;	/* Scratch pad 64 bytes wide */
	info->sprite.buf_align = 16; 	/* and 64 lines tall. */
	info->sprite.flags = FB_PIXMAP_IO;

	info->fbops->fb_cursor = atyfb_cursor;

	return 0;
}
Commit	Line	Data
1da177e4 LT	1	/*
	2	* ATI Mach64 CT/VT/GT/LT Cursor Support
	3	*/
	4
1da177e4 LT	5	#include <linux/fb.h>
	6	#include <linux/init.h>
	7	#include <linux/string.h>
	8
	9	#include <asm/io.h>
1da177e4 LT	10
1da177e4 LT	11	#ifdef __sparc__
1da177e4 LT	12	#include <asm/fbio.h>
	13	#endif
	14
	15	#include <video/mach64.h>
	16	#include "atyfb.h"
	17
	18	/*
	19	* The hardware cursor definition requires 2 bits per pixel. The
	20	* Cursor size reguardless of the visible cursor size is 64 pixels
	21	* by 64 lines. The total memory required to define the cursor is
	22	* 16 bytes / line for 64 lines or 1024 bytes of data. The data
	23	* must be in a contigiuos format. The 2 bit cursor code values are
	24	* as follows:
	25	*
	26	* 00 - pixel colour = CURSOR_CLR_0
	27	* 01 - pixel colour = CURSOR_CLR_1
	28	* 10 - pixel colour = transparent (current display pixel)
	29	* 11 - pixel colour = 1's complement of current display pixel
	30	*
	31	* Cursor Offset 64 pixels Actual Displayed Area
	32	* \_________________________/
	33	* \| \| \| \|
	34	* \|<--------------->\| \| \|
	35	* \| CURS_HORZ_OFFSET\| \| \|
	36	* \| \|_______\| \| 64 Lines
	37	* \| ^ \| \|
	38	* \| \| \| \|
	39	* \| CURS_VERT_OFFSET\| \|
	40	* \| \| \| \|
	41	* \|____________________\|____\| \|
	42	*
	43	*
	44	* The Screen position of the top left corner of the displayed
	45	* cursor is specificed by CURS_HORZ_VERT_POSN. Care must be taken
	46	* when the cursor hot spot is not the top left corner and the
	47	* physical cursor position becomes negative. It will be be displayed
	48	* if either the horizontal or vertical cursor position is negative
	49	*
	50	* If x becomes negative the cursor manager must adjust the CURS_HORZ_OFFSET
	51	* to a larger number and saturate CUR_HORZ_POSN to zero.
	52	*
	53	* if Y becomes negative, CUR_VERT_OFFSET must be adjusted to a larger number,
	54	* CUR_OFFSET must be adjusted to a point to the appropraite line in the cursor
	55	* definitation and CUR_VERT_POSN must be saturated to zero.
	56	*/
	57
	58	/*
	59	* Hardware Cursor support.
	60	*/
	61	static const u8 cursor_bits_lookup[16] = {
	62	0x00, 0x40, 0x10, 0x50, 0x04, 0x44, 0x14, 0x54,
	63	0x01, 0x41, 0x11, 0x51, 0x05, 0x45, 0x15, 0x55
	64	};
	65
1da177e4 LT	66	static int atyfb_cursor(struct fb_info info, struct fb_cursor cursor)
	67	{
	68	struct atyfb_par par = (struct atyfb_par ) info->par;
	69	u16 xoff, yoff;
	70	int x, y, h;
	71
	72	#ifdef __sparc__
	73	if (par->mmaped)
	74	return -EPERM;
	75	#endif
	76	if (par->asleep)
	77	return -EPERM;
	78
1da177e4	79	wait_for_fifo(1, par);
2f682fae KH	80	if (cursor->enable)
	81	aty_st_le32(GEN_TEST_CNTL, aty_ld_le32(GEN_TEST_CNTL, par)
	82	\| HWCURSOR_ENABLE, par);
	83	else
	84	aty_st_le32(GEN_TEST_CNTL, aty_ld_le32(GEN_TEST_CNTL, par)
	85	& ~HWCURSOR_ENABLE, par);
1da177e4 LT	86
	87	/* set position */
	88	if (cursor->set & FB_CUR_SETPOS) {
	89	x = cursor->image.dx - cursor->hot.x - info->var.xoffset;
	90	if (x < 0) {
	91	xoff = -x;
	92	x = 0;
	93	} else {
	94	xoff = 0;
	95	}
	96
	97	y = cursor->image.dy - cursor->hot.y - info->var.yoffset;
	98	if (y < 0) {
	99	yoff = -y;
	100	y = 0;
	101	} else {
	102	yoff = 0;
	103	}
	104
	105	h = cursor->image.height;
	106
	107	/*
	108	* In doublescan mode, the cursor location
	109	* and heigh also needs to be doubled.
	110	*/
	111	if (par->crtc.gen_cntl & CRTC_DBL_SCAN_EN) {
	112	y<<=1;
	113	h<<=1;
	114	}
2f682fae	115	wait_for_fifo(3, par);
1da177e4 LT	116	aty_st_le32(CUR_OFFSET, (info->fix.smem_len >> 3) + (yoff << 1), par);
	117	aty_st_le32(CUR_HORZ_VERT_OFF,
	118	((u32) (64 - h + yoff) << 16) \| xoff, par);
	119	aty_st_le32(CUR_HORZ_VERT_POSN, ((u32) y << 16) \| x, par);
	120	}
	121
	122	/* Set color map */
	123	if (cursor->set & FB_CUR_SETCMAP) {
	124	u32 fg_idx, bg_idx, fg, bg;
	125
	126	fg_idx = cursor->image.fg_color;
	127	bg_idx = cursor->image.bg_color;
	128
72c24cc5 AD	129	fg = ((info->cmap.red[fg_idx] & 0xff) << 24) \|
	130	((info->cmap.green[fg_idx] & 0xff) << 16) \|
	131	((info->cmap.blue[fg_idx] & 0xff) << 8) \| 0xff;
1da177e4	132
72c24cc5 AD	133	bg = ((info->cmap.red[bg_idx] & 0xff) << 24) \|
	134	((info->cmap.green[bg_idx] & 0xff) << 16) \|
	135	((info->cmap.blue[bg_idx] & 0xff) << 8);
1da177e4 LT	136
	137	wait_for_fifo(2, par);
	138	aty_st_le32(CUR_CLR0, bg, par);
	139	aty_st_le32(CUR_CLR1, fg, par);
	140	}
	141
	142	if (cursor->set & (FB_CUR_SETSHAPE \| FB_CUR_SETIMAGE)) {
	143	u8 src = (u8 )cursor->image.data;
	144	u8 msk = (u8 )cursor->mask;
	145	u8 __iomem dst = (u8 __iomem )info->sprite.addr;
	146	unsigned int width = (cursor->image.width + 7) >> 3;
	147	unsigned int height = cursor->image.height;
	148	unsigned int align = info->sprite.scan_align;
	149
	150	unsigned int i, j, offset;
	151	u8 m, b;
	152
	153	// Clear cursor image with 1010101010...
	154	fb_memset(dst, 0xaa, 1024);
	155
	156	offset = align - width*2;
	157
	158	for (i = 0; i < height; i++) {
	159	for (j = 0; j < width; j++) {
	160	b = *src++;
	161	m = *msk++;
	162	switch (cursor->rop) {
	163	case ROP_XOR:
	164	// Upper 4 bits of mask data
72c24cc5	165	fb_writeb(cursor_bits_lookup[(b ^ m) >> 4], dst++);
1da177e4	166	// Lower 4 bits of mask
72c24cc5 AD	167	fb_writeb(cursor_bits_lookup[(b ^ m) & 0x0f],
72c24cc5 AD	168	dst++);
1da177e4 LT	169	break;
	170	case ROP_COPY:
	171	// Upper 4 bits of mask data
72c24cc5	172	fb_writeb(cursor_bits_lookup[(b & m) >> 4], dst++);
1da177e4	173	// Lower 4 bits of mask
72c24cc5 AD	174	fb_writeb(cursor_bits_lookup[(b & m) & 0x0f],
72c24cc5 AD	175	dst++);
1da177e4 LT	176	break;
	177	}
	178	}
	179	dst += offset;
	180	}
	181	}
	182
1da177e4 LT	183	return 0;
	184	}
	185
1a8c9795	186	int __devinit aty_init_cursor(struct fb_info *info)
1da177e4 LT	187	{
	188	unsigned long addr;
	189
	190	info->fix.smem_len -= PAGE_SIZE;
	191
	192	#ifdef __sparc__
	193	addr = (unsigned long) info->screen_base - 0x800000 + info->fix.smem_len;
	194	info->sprite.addr = (u8 *) addr;
	195	#else
	196	#ifdef __BIG_ENDIAN
	197	addr = info->fix.smem_start - 0x800000 + info->fix.smem_len;
	198	info->sprite.addr = (u8 *) ioremap(addr, 1024);
	199	#else
	200	addr = (unsigned long) info->screen_base + info->fix.smem_len;
	201	info->sprite.addr = (u8 *) addr;
	202	#endif
	203	#endif
	204	if (!info->sprite.addr)
	205	return -ENXIO;
	206	info->sprite.size = PAGE_SIZE;
	207	info->sprite.scan_align = 16; /* Scratch pad 64 bytes wide */
	208	info->sprite.buf_align = 16; /* and 64 lines tall. */
	209	info->sprite.flags = FB_PIXMAP_IO;
	210
	211	info->fbops->fb_cursor = atyfb_cursor;
	212
	213	return 0;
	214	}
	215