mach64_cursor.c
上传用户:lgb322
上传日期:2013-02-24
资源大小:30529k
文件大小:6k
- /*
- * ATI Mach64 CT/VT/GT/LT Cursor Support
- */
- #include <linux/slab.h>
- #include <linux/console.h>
- #include <linux/fb.h>
- #include <linux/init.h>
- #include <asm/io.h>
- #include <asm/uaccess.h>
- #include <video/fbcon.h>
- #ifdef __sparc__
- #include <asm/pbm.h>
- #include <asm/fbio.h>
- #endif
- #include "mach64.h"
- #include "atyfb.h"
- #define DEFAULT_CURSOR_BLINK_RATE (20)
- #define CURSOR_DRAW_DELAY (2)
- /*
- * Hardware Cursor support.
- */
- static const u8 cursor_pixel_map[2] = { 0, 15 };
- static const u8 cursor_color_map[2] = { 0, 0xff };
- static const u8 cursor_bits_lookup[16] =
- {
- 0x00, 0x40, 0x10, 0x50, 0x04, 0x44, 0x14, 0x54,
- 0x01, 0x41, 0x11, 0x51, 0x05, 0x45, 0x15, 0x55
- };
- static const u8 cursor_mask_lookup[16] =
- {
- 0xaa, 0x2a, 0x8a, 0x0a, 0xa2, 0x22, 0x82, 0x02,
- 0xa8, 0x28, 0x88, 0x08, 0xa0, 0x20, 0x80, 0x00
- };
- void aty_set_cursor_color(struct fb_info_aty *fb)
- {
- struct aty_cursor *c = fb->cursor;
- const u8 *pixel = cursor_pixel_map; /* ++Geert: Why?? */
- const u8 *red = cursor_color_map;
- const u8 *green = cursor_color_map;
- const u8 *blue = cursor_color_map;
- int i;
- if (!c)
- return;
- #ifdef __sparc__
- if (fb->mmaped && (!fb->fb_info.display_fg
- || fb->fb_info.display_fg->vc_num == fb->vtconsole))
- return;
- #endif
- for (i = 0; i < 2; i++) {
- c->color[i] = (u32)red[i] << 24;
- c->color[i] |= (u32)green[i] << 16;
- c->color[i] |= (u32)blue[i] << 8;
- c->color[i] |= (u32)pixel[i];
- }
- wait_for_fifo(2, fb);
- aty_st_le32(CUR_CLR0, c->color[0], fb);
- aty_st_le32(CUR_CLR1, c->color[1], fb);
- }
- void aty_set_cursor_shape(struct fb_info_aty *fb)
- {
- struct aty_cursor *c = fb->cursor;
- u8 *ram, m, b;
- int x, y;
- if (!c)
- return;
- #ifdef __sparc__
- if (fb->mmaped && (!fb->fb_info.display_fg
- || fb->fb_info.display_fg->vc_num == fb->vtconsole))
- return;
- #endif
- ram = c->ram;
- for (y = 0; y < c->size.y; y++) {
- for (x = 0; x < c->size.x >> 2; x++) {
- m = c->mask[x][y];
- b = c->bits[x][y];
- fb_writeb (cursor_mask_lookup[m >> 4] |
- cursor_bits_lookup[(b & m) >> 4],
- ram++);
- fb_writeb (cursor_mask_lookup[m & 0x0f] |
- cursor_bits_lookup[(b & m) & 0x0f],
- ram++);
- }
- for ( ; x < 8; x++) {
- fb_writeb (0xaa, ram++);
- fb_writeb (0xaa, ram++);
- }
- }
- fb_memset (ram, 0xaa, (64 - c->size.y) * 16);
- }
- static void
- aty_set_cursor(struct fb_info_aty *fb, int on)
- {
- struct atyfb_par *par = &fb->current_par;
- struct aty_cursor *c = fb->cursor;
- u16 xoff, yoff;
- int x, y;
- if (!c)
- return;
- #ifdef __sparc__
- if (fb->mmaped && (!fb->fb_info.display_fg
- || fb->fb_info.display_fg->vc_num == fb->vtconsole))
- return;
- #endif
- if (on) {
- x = c->pos.x - c->hot.x - par->crtc.xoffset;
- if (x < 0) {
- xoff = -x;
- x = 0;
- } else {
- xoff = 0;
- }
- y = c->pos.y - c->hot.y - par->crtc.yoffset;
- if (y < 0) {
- yoff = -y;
- y = 0;
- } else {
- yoff = 0;
- }
- wait_for_fifo(4, fb);
- aty_st_le32(CUR_OFFSET, (c->offset >> 3) + (yoff << 1), fb);
- aty_st_le32(CUR_HORZ_VERT_OFF,
- ((u32)(64 - c->size.y + yoff) << 16) | xoff, fb);
- aty_st_le32(CUR_HORZ_VERT_POSN, ((u32)y << 16) | x, fb);
- aty_st_le32(GEN_TEST_CNTL, aty_ld_le32(GEN_TEST_CNTL, fb)
- | HWCURSOR_ENABLE, fb);
- } else {
- wait_for_fifo(1, fb);
- aty_st_le32(GEN_TEST_CNTL,
- aty_ld_le32(GEN_TEST_CNTL, fb) & ~HWCURSOR_ENABLE,
- fb);
- }
- if (fb->blitter_may_be_busy)
- wait_for_idle(fb);
- }
- static void
- aty_cursor_timer_handler(unsigned long dev_addr)
- {
- struct fb_info_aty *fb = (struct fb_info_aty *)dev_addr;
- if (!fb->cursor)
- return;
- if (!fb->cursor->enable)
- goto out;
- if (fb->cursor->vbl_cnt && --fb->cursor->vbl_cnt == 0) {
- fb->cursor->on ^= 1;
- aty_set_cursor(fb, fb->cursor->on);
- fb->cursor->vbl_cnt = fb->cursor->blink_rate;
- }
- out:
- fb->cursor->timer->expires = jiffies + (HZ / 50);
- add_timer(fb->cursor->timer);
- }
- void atyfb_cursor(struct display *p, int mode, int x, int y)
- {
- struct fb_info_aty *fb = (struct fb_info_aty *)p->fb_info;
- struct aty_cursor *c = fb->cursor;
- if (!c)
- return;
- #ifdef __sparc__
- if (fb->mmaped && (!fb->fb_info.display_fg
- || fb->fb_info.display_fg->vc_num == fb->vtconsole))
- return;
- #endif
- x *= fontwidth(p);
- y *= fontheight(p);
- if (c->pos.x == x && c->pos.y == y && (mode == CM_ERASE) == !c->enable)
- return;
- c->enable = 0;
- if (c->on)
- aty_set_cursor(fb, 0);
- c->pos.x = x;
- c->pos.y = y;
- switch (mode) {
- case CM_ERASE:
- c->on = 0;
- break;
- case CM_DRAW:
- case CM_MOVE:
- if (c->on)
- aty_set_cursor(fb, 1);
- else
- c->vbl_cnt = CURSOR_DRAW_DELAY;
- c->enable = 1;
- break;
- }
- }
- struct aty_cursor * __init aty_init_cursor(struct fb_info_aty *fb)
- {
- struct aty_cursor *cursor;
- unsigned long addr;
- cursor = kmalloc(sizeof(struct aty_cursor), GFP_ATOMIC);
- if (!cursor)
- return 0;
- memset(cursor, 0, sizeof(*cursor));
- cursor->timer = kmalloc(sizeof(*cursor->timer), GFP_KERNEL);
- if (!cursor->timer) {
- kfree(cursor);
- return 0;
- }
- memset(cursor->timer, 0, sizeof(*cursor->timer));
- cursor->blink_rate = DEFAULT_CURSOR_BLINK_RATE;
- fb->total_vram -= PAGE_SIZE;
- cursor->offset = fb->total_vram;
- #ifdef __sparc__
- addr = fb->frame_buffer - 0x800000 + cursor->offset;
- cursor->ram = (u8 *)addr;
- #else
- #ifdef __BIG_ENDIAN
- addr = fb->frame_buffer_phys - 0x800000 + cursor->offset;
- cursor->ram = (u8 *)ioremap(addr, 1024);
- #else
- addr = fb->frame_buffer + cursor->offset;
- cursor->ram = (u8 *)addr;
- #endif
- #endif
- if (!cursor->ram) {
- kfree(cursor);
- return NULL;
- }
- init_timer(cursor->timer);
- cursor->timer->expires = jiffies + (HZ / 50);
- cursor->timer->data = (unsigned long)fb;
- cursor->timer->function = aty_cursor_timer_handler;
- add_timer(cursor->timer);
- return cursor;
- }
- int atyfb_set_font(struct display *d, int width, int height)
- {
- struct fb_info_aty *fb = (struct fb_info_aty *)d->fb_info;
- struct aty_cursor *c = fb->cursor;
- int i, j;
- if (c) {
- if (!width || !height) {
- width = 8;
- height = 16;
- }
- c->hot.x = 0;
- c->hot.y = 0;
- c->size.x = width;
- c->size.y = height;
- memset(c->bits, 0xff, sizeof(c->bits));
- memset(c->mask, 0, sizeof(c->mask));
- for (i = 0, j = width; j >= 0; j -= 8, i++) {
- c->mask[i][height-2] = (j >= 8) ? 0xff : (0xff << (8 - j));
- c->mask[i][height-1] = (j >= 8) ? 0xff : (0xff << (8 - j));
- }
- aty_set_cursor_color(fb);
- aty_set_cursor_shape(fb);
- }
- return 1;
- }