[mirror_ubuntu-zesty-kernel.git] / drivers / video / fbdev / 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 "../core/fb_draw.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 appropriate 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++) {
			u16 l = 0xaaaa;
			b = *src++;
			m = *msk++;
			switch (cursor->rop) {
			case ROP_XOR:
			    // Upper 4 bits of mask data
			    l = cursor_bits_lookup[(b ^ m) >> 4] |
			    // Lower 4 bits of mask
				    (cursor_bits_lookup[(b ^ m) & 0x0f] << 8);
			    break;
			case ROP_COPY:
			    // Upper 4 bits of mask data
			    l = cursor_bits_lookup[(b & m) >> 4] |
			    // Lower 4 bits of mask
				    (cursor_bits_lookup[(b & m) & 0x0f] << 8);
			    break;
			}
			/*
			 * If cursor size is not a multiple of 8 characters
			 * we must pad it with transparent pattern (0xaaaa).
			 */
			if ((j + 1) * 8 > cursor->image.width) {
				l = comp(l, 0xaaaa,
				    (1 << ((cursor->image.width & 7) * 2)) - 1);
			}
			fb_writeb(l & 0xff, dst++);
			fb_writeb(l >> 8, dst++);
		}
		dst += offset;
	    }
	}

	return 0;
}

int 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>
19757fc8	8	#include "../core/fb_draw.h"
1da177e4 LT	9
1da177e4 LT	10	#include <asm/io.h>
1da177e4 LT	11
1da177e4 LT	12	#ifdef __sparc__
1da177e4 LT	13	#include <asm/fbio.h>
	14	#endif
	15
	16	#include <video/mach64.h>
	17	#include "atyfb.h"
	18
	19	/*
	20	* The hardware cursor definition requires 2 bits per pixel. The
	21	* Cursor size reguardless of the visible cursor size is 64 pixels
	22	* by 64 lines. The total memory required to define the cursor is
	23	* 16 bytes / line for 64 lines or 1024 bytes of data. The data
	24	* must be in a contigiuos format. The 2 bit cursor code values are
	25	* as follows:
	26	*
	27	* 00 - pixel colour = CURSOR_CLR_0
	28	* 01 - pixel colour = CURSOR_CLR_1
	29	* 10 - pixel colour = transparent (current display pixel)
	30	* 11 - pixel colour = 1's complement of current display pixel
	31	*
	32	* Cursor Offset 64 pixels Actual Displayed Area
	33	* \_________________________/
	34	* \| \| \| \|
	35	* \|<--------------->\| \| \|
	36	* \| CURS_HORZ_OFFSET\| \| \|
	37	* \| \|_______\| \| 64 Lines
	38	* \| ^ \| \|
	39	* \| \| \| \|
	40	* \| CURS_VERT_OFFSET\| \|
	41	* \| \| \| \|
	42	* \|____________________\|____\| \|
	43	*
	44	*
	45	* The Screen position of the top left corner of the displayed
	46	* cursor is specificed by CURS_HORZ_VERT_POSN. Care must be taken
	47	* when the cursor hot spot is not the top left corner and the
	48	* physical cursor position becomes negative. It will be be displayed
	49	* if either the horizontal or vertical cursor position is negative
	50	*
	51	* If x becomes negative the cursor manager must adjust the CURS_HORZ_OFFSET
	52	* to a larger number and saturate CUR_HORZ_POSN to zero.
	53	*
	54	* if Y becomes negative, CUR_VERT_OFFSET must be adjusted to a larger number,
25985edc	55	* CUR_OFFSET must be adjusted to a point to the appropriate line in the cursor
1da177e4 LT	56	* definitation and CUR_VERT_POSN must be saturated to zero.
	57	*/
	58
	59	/*
	60	* Hardware Cursor support.
	61	*/
	62	static const u8 cursor_bits_lookup[16] = {
	63	0x00, 0x40, 0x10, 0x50, 0x04, 0x44, 0x14, 0x54,
	64	0x01, 0x41, 0x11, 0x51, 0x05, 0x45, 0x15, 0x55
	65	};
	66
1da177e4 LT	67	static int atyfb_cursor(struct fb_info info, struct fb_cursor cursor)
	68	{
	69	struct atyfb_par par = (struct atyfb_par ) info->par;
	70	u16 xoff, yoff;
	71	int x, y, h;
	72
	73	#ifdef __sparc__
	74	if (par->mmaped)
	75	return -EPERM;
	76	#endif
	77	if (par->asleep)
	78	return -EPERM;
	79
1da177e4	80	wait_for_fifo(1, par);
2f682fae KH	81	if (cursor->enable)
	82	aty_st_le32(GEN_TEST_CNTL, aty_ld_le32(GEN_TEST_CNTL, par)
	83	\| HWCURSOR_ENABLE, par);
	84	else
	85	aty_st_le32(GEN_TEST_CNTL, aty_ld_le32(GEN_TEST_CNTL, par)
	86	& ~HWCURSOR_ENABLE, par);
1da177e4 LT	87
	88	/* set position */
	89	if (cursor->set & FB_CUR_SETPOS) {
	90	x = cursor->image.dx - cursor->hot.x - info->var.xoffset;
	91	if (x < 0) {
	92	xoff = -x;
	93	x = 0;
	94	} else {
	95	xoff = 0;
	96	}
	97
	98	y = cursor->image.dy - cursor->hot.y - info->var.yoffset;
	99	if (y < 0) {
	100	yoff = -y;
	101	y = 0;
	102	} else {
	103	yoff = 0;
	104	}
	105
	106	h = cursor->image.height;
	107
	108	/*
	109	* In doublescan mode, the cursor location
	110	* and heigh also needs to be doubled.
	111	*/
	112	if (par->crtc.gen_cntl & CRTC_DBL_SCAN_EN) {
	113	y<<=1;
	114	h<<=1;
	115	}
2f682fae	116	wait_for_fifo(3, par);
1da177e4 LT	117	aty_st_le32(CUR_OFFSET, (info->fix.smem_len >> 3) + (yoff << 1), par);
	118	aty_st_le32(CUR_HORZ_VERT_OFF,
	119	((u32) (64 - h + yoff) << 16) \| xoff, par);
	120	aty_st_le32(CUR_HORZ_VERT_POSN, ((u32) y << 16) \| x, par);
	121	}
	122
	123	/* Set color map */
	124	if (cursor->set & FB_CUR_SETCMAP) {
	125	u32 fg_idx, bg_idx, fg, bg;
	126
	127	fg_idx = cursor->image.fg_color;
	128	bg_idx = cursor->image.bg_color;
	129
72c24cc5 AD	130	fg = ((info->cmap.red[fg_idx] & 0xff) << 24) \|
	131	((info->cmap.green[fg_idx] & 0xff) << 16) \|
	132	((info->cmap.blue[fg_idx] & 0xff) << 8) \| 0xff;
1da177e4	133
72c24cc5 AD	134	bg = ((info->cmap.red[bg_idx] & 0xff) << 24) \|
	135	((info->cmap.green[bg_idx] & 0xff) << 16) \|
	136	((info->cmap.blue[bg_idx] & 0xff) << 8);
1da177e4 LT	137
	138	wait_for_fifo(2, par);
	139	aty_st_le32(CUR_CLR0, bg, par);
	140	aty_st_le32(CUR_CLR1, fg, par);
	141	}
	142
	143	if (cursor->set & (FB_CUR_SETSHAPE \| FB_CUR_SETIMAGE)) {
	144	u8 src = (u8 )cursor->image.data;
	145	u8 msk = (u8 )cursor->mask;
	146	u8 __iomem dst = (u8 __iomem )info->sprite.addr;
	147	unsigned int width = (cursor->image.width + 7) >> 3;
	148	unsigned int height = cursor->image.height;
	149	unsigned int align = info->sprite.scan_align;
	150
	151	unsigned int i, j, offset;
	152	u8 m, b;
	153
	154	// Clear cursor image with 1010101010...
	155	fb_memset(dst, 0xaa, 1024);
	156
	157	offset = align - width*2;
	158
	159	for (i = 0; i < height; i++) {
	160	for (j = 0; j < width; j++) {
43751a1b	161	u16 l = 0xaaaa;
1da177e4 LT	162	b = *src++;
	163	m = *msk++;
	164	switch (cursor->rop) {
	165	case ROP_XOR:
	166	// Upper 4 bits of mask data
43751a1b	167	l = cursor_bits_lookup[(b ^ m) >> 4] \|
1da177e4	168	// Lower 4 bits of mask
43751a1b	169	(cursor_bits_lookup[(b ^ m) & 0x0f] << 8);
1da177e4 LT	170	break;
	171	case ROP_COPY:
	172	// Upper 4 bits of mask data
43751a1b	173	l = cursor_bits_lookup[(b & m) >> 4] \|
1da177e4	174	// Lower 4 bits of mask
43751a1b	175	(cursor_bits_lookup[(b & m) & 0x0f] << 8);
1da177e4 LT	176	break;
1da177e4 LT	177	}
43751a1b MP	178	/*
	179	* If cursor size is not a multiple of 8 characters
	180	* we must pad it with transparent pattern (0xaaaa).
	181	*/
	182	if ((j + 1) * 8 > cursor->image.width) {
	183	l = comp(l, 0xaaaa,
	184	(1 << ((cursor->image.width & 7) * 2)) - 1);
	185	}
	186	fb_writeb(l & 0xff, dst++);
	187	fb_writeb(l >> 8, dst++);
1da177e4 LT	188	}
	189	dst += offset;
	190	}
	191	}
	192
1da177e4 LT	193	return 0;
	194	}
	195
48c68c4f	196	int aty_init_cursor(struct fb_info *info)
1da177e4 LT	197	{
	198	unsigned long addr;
	199
	200	info->fix.smem_len -= PAGE_SIZE;
	201
	202	#ifdef __sparc__
	203	addr = (unsigned long) info->screen_base - 0x800000 + info->fix.smem_len;
	204	info->sprite.addr = (u8 *) addr;
	205	#else
	206	#ifdef __BIG_ENDIAN
	207	addr = info->fix.smem_start - 0x800000 + info->fix.smem_len;
	208	info->sprite.addr = (u8 *) ioremap(addr, 1024);
	209	#else
	210	addr = (unsigned long) info->screen_base + info->fix.smem_len;
	211	info->sprite.addr = (u8 *) addr;
	212	#endif
	213	#endif
	214	if (!info->sprite.addr)
	215	return -ENXIO;
	216	info->sprite.size = PAGE_SIZE;
	217	info->sprite.scan_align = 16; /* Scratch pad 64 bytes wide */
	218	info->sprite.buf_align = 16; /* and 64 lines tall. */
	219	info->sprite.flags = FB_PIXMAP_IO;
	220
	221	info->fbops->fb_cursor = atyfb_cursor;
	222
	223	return 0;
	224	}
	225