1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
|
/*
* ATI Mach64 CT/VT/GT/LT Cursor Support
*/
#include <linux/fb.h>
#include <linux/init.h>
#include <linux/string.h>
#include "../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;
}
|
