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226 lines
6.0 KiB
226 lines
6.0 KiB
// SPDX-License-Identifier: GPL-2.0 |
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/* |
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* ATI Mach64 CT/VT/GT/LT Cursor Support |
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*/ |
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#include <linux/fb.h> |
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#include <linux/init.h> |
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#include <linux/string.h> |
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#include "../core/fb_draw.h" |
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#include <asm/io.h> |
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#ifdef __sparc__ |
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#include <asm/fbio.h> |
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#endif |
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#include <video/mach64.h> |
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#include "atyfb.h" |
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/* |
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* The hardware cursor definition requires 2 bits per pixel. The |
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* Cursor size reguardless of the visible cursor size is 64 pixels |
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* by 64 lines. The total memory required to define the cursor is |
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* 16 bytes / line for 64 lines or 1024 bytes of data. The data |
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* must be in a contigiuos format. The 2 bit cursor code values are |
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* as follows: |
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* |
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* 00 - pixel colour = CURSOR_CLR_0 |
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* 01 - pixel colour = CURSOR_CLR_1 |
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* 10 - pixel colour = transparent (current display pixel) |
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* 11 - pixel colour = 1's complement of current display pixel |
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* |
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* Cursor Offset 64 pixels Actual Displayed Area |
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* \_________________________/ |
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* | | | | |
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* |<--------------->| | | |
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* | CURS_HORZ_OFFSET| | | |
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* | |_______| | 64 Lines |
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* | ^ | | |
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* | | | | |
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* | CURS_VERT_OFFSET| | |
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* | | | | |
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* |____________________|____| | |
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* |
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* |
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* The Screen position of the top left corner of the displayed |
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* cursor is specificed by CURS_HORZ_VERT_POSN. Care must be taken |
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* when the cursor hot spot is not the top left corner and the |
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* physical cursor position becomes negative. It will be displayed |
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* if either the horizontal or vertical cursor position is negative |
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* |
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* If x becomes negative the cursor manager must adjust the CURS_HORZ_OFFSET |
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* to a larger number and saturate CUR_HORZ_POSN to zero. |
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* |
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* if Y becomes negative, CUR_VERT_OFFSET must be adjusted to a larger number, |
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* CUR_OFFSET must be adjusted to a point to the appropriate line in the cursor |
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* definitation and CUR_VERT_POSN must be saturated to zero. |
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*/ |
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/* |
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* Hardware Cursor support. |
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*/ |
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static const u8 cursor_bits_lookup[16] = { |
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0x00, 0x40, 0x10, 0x50, 0x04, 0x44, 0x14, 0x54, |
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0x01, 0x41, 0x11, 0x51, 0x05, 0x45, 0x15, 0x55 |
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}; |
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static int atyfb_cursor(struct fb_info *info, struct fb_cursor *cursor) |
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{ |
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struct atyfb_par *par = (struct atyfb_par *) info->par; |
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u16 xoff, yoff; |
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int x, y, h; |
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#ifdef __sparc__ |
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if (par->mmaped) |
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return -EPERM; |
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#endif |
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if (par->asleep) |
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return -EPERM; |
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wait_for_fifo(1, par); |
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if (cursor->enable) |
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aty_st_le32(GEN_TEST_CNTL, aty_ld_le32(GEN_TEST_CNTL, par) |
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| HWCURSOR_ENABLE, par); |
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else |
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aty_st_le32(GEN_TEST_CNTL, aty_ld_le32(GEN_TEST_CNTL, par) |
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& ~HWCURSOR_ENABLE, par); |
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/* set position */ |
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if (cursor->set & FB_CUR_SETPOS) { |
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x = cursor->image.dx - cursor->hot.x - info->var.xoffset; |
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if (x < 0) { |
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xoff = -x; |
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x = 0; |
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} else { |
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xoff = 0; |
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} |
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y = cursor->image.dy - cursor->hot.y - info->var.yoffset; |
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if (y < 0) { |
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yoff = -y; |
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y = 0; |
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} else { |
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yoff = 0; |
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} |
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h = cursor->image.height; |
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/* |
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* In doublescan mode, the cursor location |
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* and heigh also needs to be doubled. |
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*/ |
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if (par->crtc.gen_cntl & CRTC_DBL_SCAN_EN) { |
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y<<=1; |
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h<<=1; |
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} |
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wait_for_fifo(3, par); |
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aty_st_le32(CUR_OFFSET, (info->fix.smem_len >> 3) + (yoff << 1), par); |
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aty_st_le32(CUR_HORZ_VERT_OFF, |
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((u32) (64 - h + yoff) << 16) | xoff, par); |
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aty_st_le32(CUR_HORZ_VERT_POSN, ((u32) y << 16) | x, par); |
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} |
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/* Set color map */ |
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if (cursor->set & FB_CUR_SETCMAP) { |
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u32 fg_idx, bg_idx, fg, bg; |
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fg_idx = cursor->image.fg_color; |
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bg_idx = cursor->image.bg_color; |
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fg = ((info->cmap.red[fg_idx] & 0xff) << 24) | |
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((info->cmap.green[fg_idx] & 0xff) << 16) | |
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((info->cmap.blue[fg_idx] & 0xff) << 8) | 0xff; |
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bg = ((info->cmap.red[bg_idx] & 0xff) << 24) | |
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((info->cmap.green[bg_idx] & 0xff) << 16) | |
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((info->cmap.blue[bg_idx] & 0xff) << 8); |
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wait_for_fifo(2, par); |
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aty_st_le32(CUR_CLR0, bg, par); |
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aty_st_le32(CUR_CLR1, fg, par); |
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} |
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if (cursor->set & (FB_CUR_SETSHAPE | FB_CUR_SETIMAGE)) { |
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u8 *src = (u8 *)cursor->image.data; |
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u8 *msk = (u8 *)cursor->mask; |
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u8 __iomem *dst = (u8 __iomem *)info->sprite.addr; |
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unsigned int width = (cursor->image.width + 7) >> 3; |
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unsigned int height = cursor->image.height; |
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unsigned int align = info->sprite.scan_align; |
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unsigned int i, j, offset; |
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u8 m, b; |
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// Clear cursor image with 1010101010... |
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fb_memset(dst, 0xaa, 1024); |
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offset = align - width*2; |
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for (i = 0; i < height; i++) { |
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for (j = 0; j < width; j++) { |
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u16 l = 0xaaaa; |
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b = *src++; |
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m = *msk++; |
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switch (cursor->rop) { |
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case ROP_XOR: |
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// Upper 4 bits of mask data |
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l = cursor_bits_lookup[(b ^ m) >> 4] | |
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// Lower 4 bits of mask |
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(cursor_bits_lookup[(b ^ m) & 0x0f] << 8); |
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break; |
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case ROP_COPY: |
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// Upper 4 bits of mask data |
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l = cursor_bits_lookup[(b & m) >> 4] | |
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// Lower 4 bits of mask |
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(cursor_bits_lookup[(b & m) & 0x0f] << 8); |
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break; |
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} |
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/* |
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* If cursor size is not a multiple of 8 characters |
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* we must pad it with transparent pattern (0xaaaa). |
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*/ |
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if ((j + 1) * 8 > cursor->image.width) { |
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l = comp(l, 0xaaaa, |
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(1 << ((cursor->image.width & 7) * 2)) - 1); |
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} |
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fb_writeb(l & 0xff, dst++); |
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fb_writeb(l >> 8, dst++); |
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} |
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dst += offset; |
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} |
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} |
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return 0; |
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} |
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int aty_init_cursor(struct fb_info *info, struct fb_ops *atyfb_ops) |
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{ |
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unsigned long addr; |
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info->fix.smem_len -= PAGE_SIZE; |
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#ifdef __sparc__ |
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addr = (unsigned long) info->screen_base - 0x800000 + info->fix.smem_len; |
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info->sprite.addr = (u8 *) addr; |
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#else |
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#ifdef __BIG_ENDIAN |
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addr = info->fix.smem_start - 0x800000 + info->fix.smem_len; |
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info->sprite.addr = (u8 *) ioremap(addr, 1024); |
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#else |
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addr = (unsigned long) info->screen_base + info->fix.smem_len; |
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info->sprite.addr = (u8 *) addr; |
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#endif |
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#endif |
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if (!info->sprite.addr) |
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return -ENXIO; |
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info->sprite.size = PAGE_SIZE; |
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info->sprite.scan_align = 16; /* Scratch pad 64 bytes wide */ |
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info->sprite.buf_align = 16; /* and 64 lines tall. */ |
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info->sprite.flags = FB_PIXMAP_IO; |
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atyfb_ops->fb_cursor = atyfb_cursor; |
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return 0; |
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} |
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