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1da177e4 LT |
1 | /* |
2 | * ATI Mach64 CT/VT/GT/LT Cursor Support | |
3 | */ | |
4 | ||
5 | #include <linux/slab.h> | |
6 | #include <linux/fb.h> | |
7 | #include <linux/init.h> | |
8 | #include <linux/string.h> | |
9 | ||
10 | #include <asm/io.h> | |
1da177e4 LT |
11 | |
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, | |
55 | * CUR_OFFSET must be adjusted to a point to the appropraite line in the cursor | |
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 | ||
80 | /* Hide cursor */ | |
81 | wait_for_fifo(1, par); | |
82 | aty_st_le32(GEN_TEST_CNTL, aty_ld_le32(GEN_TEST_CNTL, par) & ~HWCURSOR_ENABLE, par); | |
83 | ||
84 | /* set position */ | |
85 | if (cursor->set & FB_CUR_SETPOS) { | |
86 | x = cursor->image.dx - cursor->hot.x - info->var.xoffset; | |
87 | if (x < 0) { | |
88 | xoff = -x; | |
89 | x = 0; | |
90 | } else { | |
91 | xoff = 0; | |
92 | } | |
93 | ||
94 | y = cursor->image.dy - cursor->hot.y - info->var.yoffset; | |
95 | if (y < 0) { | |
96 | yoff = -y; | |
97 | y = 0; | |
98 | } else { | |
99 | yoff = 0; | |
100 | } | |
101 | ||
102 | h = cursor->image.height; | |
103 | ||
104 | /* | |
105 | * In doublescan mode, the cursor location | |
106 | * and heigh also needs to be doubled. | |
107 | */ | |
108 | if (par->crtc.gen_cntl & CRTC_DBL_SCAN_EN) { | |
109 | y<<=1; | |
110 | h<<=1; | |
111 | } | |
112 | wait_for_fifo(4, par); | |
113 | aty_st_le32(CUR_OFFSET, (info->fix.smem_len >> 3) + (yoff << 1), par); | |
114 | aty_st_le32(CUR_HORZ_VERT_OFF, | |
115 | ((u32) (64 - h + yoff) << 16) | xoff, par); | |
116 | aty_st_le32(CUR_HORZ_VERT_POSN, ((u32) y << 16) | x, par); | |
117 | } | |
118 | ||
119 | /* Set color map */ | |
120 | if (cursor->set & FB_CUR_SETCMAP) { | |
121 | u32 fg_idx, bg_idx, fg, bg; | |
122 | ||
123 | fg_idx = cursor->image.fg_color; | |
124 | bg_idx = cursor->image.bg_color; | |
125 | ||
72c24cc5 AD |
126 | fg = ((info->cmap.red[fg_idx] & 0xff) << 24) | |
127 | ((info->cmap.green[fg_idx] & 0xff) << 16) | | |
128 | ((info->cmap.blue[fg_idx] & 0xff) << 8) | 0xff; | |
1da177e4 | 129 | |
72c24cc5 AD |
130 | bg = ((info->cmap.red[bg_idx] & 0xff) << 24) | |
131 | ((info->cmap.green[bg_idx] & 0xff) << 16) | | |
132 | ((info->cmap.blue[bg_idx] & 0xff) << 8); | |
1da177e4 LT |
133 | |
134 | wait_for_fifo(2, par); | |
135 | aty_st_le32(CUR_CLR0, bg, par); | |
136 | aty_st_le32(CUR_CLR1, fg, par); | |
137 | } | |
138 | ||
139 | if (cursor->set & (FB_CUR_SETSHAPE | FB_CUR_SETIMAGE)) { | |
140 | u8 *src = (u8 *)cursor->image.data; | |
141 | u8 *msk = (u8 *)cursor->mask; | |
142 | u8 __iomem *dst = (u8 __iomem *)info->sprite.addr; | |
143 | unsigned int width = (cursor->image.width + 7) >> 3; | |
144 | unsigned int height = cursor->image.height; | |
145 | unsigned int align = info->sprite.scan_align; | |
146 | ||
147 | unsigned int i, j, offset; | |
148 | u8 m, b; | |
149 | ||
150 | // Clear cursor image with 1010101010... | |
151 | fb_memset(dst, 0xaa, 1024); | |
152 | ||
153 | offset = align - width*2; | |
154 | ||
155 | for (i = 0; i < height; i++) { | |
156 | for (j = 0; j < width; j++) { | |
157 | b = *src++; | |
158 | m = *msk++; | |
159 | switch (cursor->rop) { | |
160 | case ROP_XOR: | |
161 | // Upper 4 bits of mask data | |
72c24cc5 | 162 | fb_writeb(cursor_bits_lookup[(b ^ m) >> 4], dst++); |
1da177e4 | 163 | // Lower 4 bits of mask |
72c24cc5 AD |
164 | fb_writeb(cursor_bits_lookup[(b ^ m) & 0x0f], |
165 | dst++); | |
1da177e4 LT |
166 | break; |
167 | case ROP_COPY: | |
168 | // Upper 4 bits of mask data | |
72c24cc5 | 169 | fb_writeb(cursor_bits_lookup[(b & m) >> 4], dst++); |
1da177e4 | 170 | // Lower 4 bits of mask |
72c24cc5 AD |
171 | fb_writeb(cursor_bits_lookup[(b & m) & 0x0f], |
172 | dst++); | |
1da177e4 LT |
173 | break; |
174 | } | |
175 | } | |
176 | dst += offset; | |
177 | } | |
178 | } | |
179 | ||
180 | if (cursor->enable) { | |
181 | wait_for_fifo(1, par); | |
182 | aty_st_le32(GEN_TEST_CNTL, aty_ld_le32(GEN_TEST_CNTL, par) | |
183 | | HWCURSOR_ENABLE, par); | |
184 | } | |
185 | return 0; | |
186 | } | |
187 | ||
1a8c9795 | 188 | int __devinit aty_init_cursor(struct fb_info *info) |
1da177e4 LT |
189 | { |
190 | unsigned long addr; | |
191 | ||
192 | info->fix.smem_len -= PAGE_SIZE; | |
193 | ||
194 | #ifdef __sparc__ | |
195 | addr = (unsigned long) info->screen_base - 0x800000 + info->fix.smem_len; | |
196 | info->sprite.addr = (u8 *) addr; | |
197 | #else | |
198 | #ifdef __BIG_ENDIAN | |
199 | addr = info->fix.smem_start - 0x800000 + info->fix.smem_len; | |
200 | info->sprite.addr = (u8 *) ioremap(addr, 1024); | |
201 | #else | |
202 | addr = (unsigned long) info->screen_base + info->fix.smem_len; | |
203 | info->sprite.addr = (u8 *) addr; | |
204 | #endif | |
205 | #endif | |
206 | if (!info->sprite.addr) | |
207 | return -ENXIO; | |
208 | info->sprite.size = PAGE_SIZE; | |
209 | info->sprite.scan_align = 16; /* Scratch pad 64 bytes wide */ | |
210 | info->sprite.buf_align = 16; /* and 64 lines tall. */ | |
211 | info->sprite.flags = FB_PIXMAP_IO; | |
212 | ||
213 | info->fbops->fb_cursor = atyfb_cursor; | |
214 | ||
215 | return 0; | |
216 | } | |
217 |