Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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> |
| 11 | #include <asm/uaccess.h> |
| 12 | |
| 13 | #ifdef __sparc__ |
| 14 | #include <asm/pbm.h> |
| 15 | #include <asm/fbio.h> |
| 16 | #endif |
| 17 | |
| 18 | #include <video/mach64.h> |
| 19 | #include "atyfb.h" |
| 20 | |
| 21 | /* |
| 22 | * The hardware cursor definition requires 2 bits per pixel. The |
| 23 | * Cursor size reguardless of the visible cursor size is 64 pixels |
| 24 | * by 64 lines. The total memory required to define the cursor is |
| 25 | * 16 bytes / line for 64 lines or 1024 bytes of data. The data |
| 26 | * must be in a contigiuos format. The 2 bit cursor code values are |
| 27 | * as follows: |
| 28 | * |
| 29 | * 00 - pixel colour = CURSOR_CLR_0 |
| 30 | * 01 - pixel colour = CURSOR_CLR_1 |
| 31 | * 10 - pixel colour = transparent (current display pixel) |
| 32 | * 11 - pixel colour = 1's complement of current display pixel |
| 33 | * |
| 34 | * Cursor Offset 64 pixels Actual Displayed Area |
| 35 | * \_________________________/ |
| 36 | * | | | | |
| 37 | * |<--------------->| | | |
| 38 | * | CURS_HORZ_OFFSET| | | |
| 39 | * | |_______| | 64 Lines |
| 40 | * | ^ | | |
| 41 | * | | | | |
| 42 | * | CURS_VERT_OFFSET| | |
| 43 | * | | | | |
| 44 | * |____________________|____| | |
| 45 | * |
| 46 | * |
| 47 | * The Screen position of the top left corner of the displayed |
| 48 | * cursor is specificed by CURS_HORZ_VERT_POSN. Care must be taken |
| 49 | * when the cursor hot spot is not the top left corner and the |
| 50 | * physical cursor position becomes negative. It will be be displayed |
| 51 | * if either the horizontal or vertical cursor position is negative |
| 52 | * |
| 53 | * If x becomes negative the cursor manager must adjust the CURS_HORZ_OFFSET |
| 54 | * to a larger number and saturate CUR_HORZ_POSN to zero. |
| 55 | * |
| 56 | * if Y becomes negative, CUR_VERT_OFFSET must be adjusted to a larger number, |
| 57 | * CUR_OFFSET must be adjusted to a point to the appropraite line in the cursor |
| 58 | * definitation and CUR_VERT_POSN must be saturated to zero. |
| 59 | */ |
| 60 | |
| 61 | /* |
| 62 | * Hardware Cursor support. |
| 63 | */ |
| 64 | static const u8 cursor_bits_lookup[16] = { |
| 65 | 0x00, 0x40, 0x10, 0x50, 0x04, 0x44, 0x14, 0x54, |
| 66 | 0x01, 0x41, 0x11, 0x51, 0x05, 0x45, 0x15, 0x55 |
| 67 | }; |
| 68 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 69 | static int atyfb_cursor(struct fb_info *info, struct fb_cursor *cursor) |
| 70 | { |
| 71 | struct atyfb_par *par = (struct atyfb_par *) info->par; |
| 72 | u16 xoff, yoff; |
| 73 | int x, y, h; |
| 74 | |
| 75 | #ifdef __sparc__ |
| 76 | if (par->mmaped) |
| 77 | return -EPERM; |
| 78 | #endif |
| 79 | if (par->asleep) |
| 80 | return -EPERM; |
| 81 | |
| 82 | /* Hide cursor */ |
| 83 | wait_for_fifo(1, par); |
| 84 | aty_st_le32(GEN_TEST_CNTL, aty_ld_le32(GEN_TEST_CNTL, par) & ~HWCURSOR_ENABLE, par); |
| 85 | |
| 86 | /* set position */ |
| 87 | if (cursor->set & FB_CUR_SETPOS) { |
| 88 | x = cursor->image.dx - cursor->hot.x - info->var.xoffset; |
| 89 | if (x < 0) { |
| 90 | xoff = -x; |
| 91 | x = 0; |
| 92 | } else { |
| 93 | xoff = 0; |
| 94 | } |
| 95 | |
| 96 | y = cursor->image.dy - cursor->hot.y - info->var.yoffset; |
| 97 | if (y < 0) { |
| 98 | yoff = -y; |
| 99 | y = 0; |
| 100 | } else { |
| 101 | yoff = 0; |
| 102 | } |
| 103 | |
| 104 | h = cursor->image.height; |
| 105 | |
| 106 | /* |
| 107 | * In doublescan mode, the cursor location |
| 108 | * and heigh also needs to be doubled. |
| 109 | */ |
| 110 | if (par->crtc.gen_cntl & CRTC_DBL_SCAN_EN) { |
| 111 | y<<=1; |
| 112 | h<<=1; |
| 113 | } |
| 114 | wait_for_fifo(4, par); |
| 115 | aty_st_le32(CUR_OFFSET, (info->fix.smem_len >> 3) + (yoff << 1), par); |
| 116 | aty_st_le32(CUR_HORZ_VERT_OFF, |
| 117 | ((u32) (64 - h + yoff) << 16) | xoff, par); |
| 118 | aty_st_le32(CUR_HORZ_VERT_POSN, ((u32) y << 16) | x, par); |
| 119 | } |
| 120 | |
| 121 | /* Set color map */ |
| 122 | if (cursor->set & FB_CUR_SETCMAP) { |
| 123 | u32 fg_idx, bg_idx, fg, bg; |
| 124 | |
| 125 | fg_idx = cursor->image.fg_color; |
| 126 | bg_idx = cursor->image.bg_color; |
| 127 | |
Antonino A. Daplas | 72c24cc | 2006-06-26 00:26:31 -0700 | [diff] [blame] | 128 | fg = ((info->cmap.red[fg_idx] & 0xff) << 24) | |
| 129 | ((info->cmap.green[fg_idx] & 0xff) << 16) | |
| 130 | ((info->cmap.blue[fg_idx] & 0xff) << 8) | 0xff; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 131 | |
Antonino A. Daplas | 72c24cc | 2006-06-26 00:26:31 -0700 | [diff] [blame] | 132 | bg = ((info->cmap.red[bg_idx] & 0xff) << 24) | |
| 133 | ((info->cmap.green[bg_idx] & 0xff) << 16) | |
| 134 | ((info->cmap.blue[bg_idx] & 0xff) << 8); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 135 | |
| 136 | wait_for_fifo(2, par); |
| 137 | aty_st_le32(CUR_CLR0, bg, par); |
| 138 | aty_st_le32(CUR_CLR1, fg, par); |
| 139 | } |
| 140 | |
| 141 | if (cursor->set & (FB_CUR_SETSHAPE | FB_CUR_SETIMAGE)) { |
| 142 | u8 *src = (u8 *)cursor->image.data; |
| 143 | u8 *msk = (u8 *)cursor->mask; |
| 144 | u8 __iomem *dst = (u8 __iomem *)info->sprite.addr; |
| 145 | unsigned int width = (cursor->image.width + 7) >> 3; |
| 146 | unsigned int height = cursor->image.height; |
| 147 | unsigned int align = info->sprite.scan_align; |
| 148 | |
| 149 | unsigned int i, j, offset; |
| 150 | u8 m, b; |
| 151 | |
| 152 | // Clear cursor image with 1010101010... |
| 153 | fb_memset(dst, 0xaa, 1024); |
| 154 | |
| 155 | offset = align - width*2; |
| 156 | |
| 157 | for (i = 0; i < height; i++) { |
| 158 | for (j = 0; j < width; j++) { |
| 159 | b = *src++; |
| 160 | m = *msk++; |
| 161 | switch (cursor->rop) { |
| 162 | case ROP_XOR: |
| 163 | // Upper 4 bits of mask data |
Antonino A. Daplas | 72c24cc | 2006-06-26 00:26:31 -0700 | [diff] [blame] | 164 | fb_writeb(cursor_bits_lookup[(b ^ m) >> 4], dst++); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 165 | // Lower 4 bits of mask |
Antonino A. Daplas | 72c24cc | 2006-06-26 00:26:31 -0700 | [diff] [blame] | 166 | fb_writeb(cursor_bits_lookup[(b ^ m) & 0x0f], |
| 167 | dst++); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 168 | break; |
| 169 | case ROP_COPY: |
| 170 | // Upper 4 bits of mask data |
Antonino A. Daplas | 72c24cc | 2006-06-26 00:26:31 -0700 | [diff] [blame] | 171 | fb_writeb(cursor_bits_lookup[(b & m) >> 4], dst++); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 172 | // Lower 4 bits of mask |
Antonino A. Daplas | 72c24cc | 2006-06-26 00:26:31 -0700 | [diff] [blame] | 173 | fb_writeb(cursor_bits_lookup[(b & m) & 0x0f], |
| 174 | dst++); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 175 | break; |
| 176 | } |
| 177 | } |
| 178 | dst += offset; |
| 179 | } |
| 180 | } |
| 181 | |
| 182 | if (cursor->enable) { |
| 183 | wait_for_fifo(1, par); |
| 184 | aty_st_le32(GEN_TEST_CNTL, aty_ld_le32(GEN_TEST_CNTL, par) |
| 185 | | HWCURSOR_ENABLE, par); |
| 186 | } |
| 187 | return 0; |
| 188 | } |
| 189 | |
Antonino A. Daplas | 1a8c979 | 2006-06-26 00:26:58 -0700 | [diff] [blame] | 190 | int __devinit aty_init_cursor(struct fb_info *info) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 191 | { |
| 192 | unsigned long addr; |
| 193 | |
| 194 | info->fix.smem_len -= PAGE_SIZE; |
| 195 | |
| 196 | #ifdef __sparc__ |
| 197 | addr = (unsigned long) info->screen_base - 0x800000 + info->fix.smem_len; |
| 198 | info->sprite.addr = (u8 *) addr; |
| 199 | #else |
| 200 | #ifdef __BIG_ENDIAN |
| 201 | addr = info->fix.smem_start - 0x800000 + info->fix.smem_len; |
| 202 | info->sprite.addr = (u8 *) ioremap(addr, 1024); |
| 203 | #else |
| 204 | addr = (unsigned long) info->screen_base + info->fix.smem_len; |
| 205 | info->sprite.addr = (u8 *) addr; |
| 206 | #endif |
| 207 | #endif |
| 208 | if (!info->sprite.addr) |
| 209 | return -ENXIO; |
| 210 | info->sprite.size = PAGE_SIZE; |
| 211 | info->sprite.scan_align = 16; /* Scratch pad 64 bytes wide */ |
| 212 | info->sprite.buf_align = 16; /* and 64 lines tall. */ |
| 213 | info->sprite.flags = FB_PIXMAP_IO; |
| 214 | |
| 215 | info->fbops->fb_cursor = atyfb_cursor; |
| 216 | |
| 217 | return 0; |
| 218 | } |
| 219 | |