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- /*
- * (C) Gražvydas "notaz" Ignotas, 2009,2013
- *
- * This work is licensed under the terms of any of these licenses
- * (at your option):
- * - GNU GPL, version 2 or later.
- * - GNU LGPL, version 2.1 or later.
- * - MAME license.
- * See the COPYING file in the top-level directory.
- *
- * <random_info=mem_map>
- * 00000000-029fffff linux (42MB)
- * 02a00000-02dfffff fb (4MB, 153600B really used)
- * 02e00000-02ffffff sound dma (2MB)
- * 03000000-03ffffff MPEGDEC (?, 16MB)
- * </random_info>
- */
- #include <stdio.h>
- #include <stdlib.h>
- #include <string.h>
- #include <sys/types.h>
- #include <sys/stat.h>
- #include <fcntl.h>
- #include <sys/ioctl.h>
- #include <sys/mman.h>
- #include <linux/fb.h>
- #include <unistd.h>
- #include "../libpicofe/gp2x/soc.h"
- #include "../libpicofe/gp2x/plat_gp2x.h"
- #include "../libpicofe/gp2x/pollux_set.h"
- #include "../common/emu.h"
- #include "../common/arm_utils.h"
- #include "plat.h"
- #define fb_buf_count 4
- static unsigned int fb_paddr[fb_buf_count];
- static int fb_work_buf;
- static int fbdev = -1;
- static unsigned short memtimex_old[2];
- static int last_pal_setting = 0;
- /* misc */
- static void pollux_set_fromenv(const char *env_var)
- {
- const char *set_string;
- set_string = getenv(env_var);
- if (set_string)
- pollux_set(memregs, set_string);
- else
- printf("env var %s not defined.\n", env_var);
- }
- /* video stuff */
- static void pollux_video_flip(int buf_count)
- {
- memregl[0x406C>>2] = fb_paddr[fb_work_buf];
- memregl[0x4058>>2] |= 0x10;
- fb_work_buf++;
- if (fb_work_buf >= buf_count)
- fb_work_buf = 0;
- g_screen_ptr = gp2x_screens[fb_work_buf];
- }
- static void gp2x_video_flip_(void)
- {
- pollux_video_flip(fb_buf_count);
- }
- /* doulblebuffered flip */
- static void gp2x_video_flip2_(void)
- {
- pollux_video_flip(2);
- }
- static void gp2x_video_changemode_ll_(int bpp)
- {
- static int prev_bpp = 0;
- int code = 0, bytes = 2;
- int rot_cmd[2] = { 0, 0 };
- unsigned int r;
- char buff[32];
- int ret;
- if (bpp == prev_bpp)
- return;
- prev_bpp = bpp;
- printf("changemode: %dbpp rot=%d\n", abs(bpp), bpp < 0);
- /* negative bpp means rotated mode */
- rot_cmd[0] = (bpp < 0) ? 6 : 5;
- ret = ioctl(fbdev, _IOW('D', 90, int[2]), rot_cmd);
- if (ret < 0)
- perror("rot ioctl failed");
- memregl[0x4004>>2] = (bpp < 0) ? 0x013f00ef : 0x00ef013f;
- memregl[0x4000>>2] |= 1 << 3;
- /* the above ioctl resets LCD timings, so set them here */
- snprintf(buff, sizeof(buff), "POLLUX_LCD_TIMINGS_%s", last_pal_setting ? "PAL" : "NTSC");
- pollux_set_fromenv(buff);
- switch (abs(bpp))
- {
- case 8:
- code = 0x443a;
- bytes = 1;
- break;
- case 15:
- case 16:
- code = 0x4432;
- bytes = 2;
- break;
- default:
- printf("unhandled bpp request: %d\n", abs(bpp));
- return;
- }
- memregl[0x405c>>2] = bytes;
- memregl[0x4060>>2] = bytes * (bpp < 0 ? 240 : 320);
- r = memregl[0x4058>>2];
- r = (r & 0xffff) | (code << 16) | 0x10;
- memregl[0x4058>>2] = r;
- }
- static void gp2x_video_setpalette_(int *pal, int len)
- {
- /* pollux palette is 16bpp only.. */
- int i;
- for (i = 0; i < len; i++)
- {
- int c = pal[i];
- c = ((c >> 8) & 0xf800) | ((c >> 5) & 0x07c0) | ((c >> 3) & 0x001f);
- memregl[0x4070>>2] = (i << 24) | c;
- }
- }
- static void gp2x_video_RGB_setscaling_(int ln_offs, int W, int H)
- {
- /* maybe a job for 3d hardware? */
- }
- static void gp2x_video_wait_vsync_(void)
- {
- while (!(memregl[0x308c>>2] & (1 << 10)))
- spend_cycles(128);
- memregl[0x308c>>2] |= 1 << 10;
- }
- /* RAM timings */
- static void set_ram_timings_(void)
- {
- pollux_set_fromenv("POLLUX_RAM_TIMINGS");
- }
- static void unset_ram_timings_(void)
- {
- int i;
- memregs[0x14802>>1] = memtimex_old[0];
- memregs[0x14804>>1] = memtimex_old[1] | 0x8000;
- for (i = 0; i < 0x100000; i++)
- if (!(memregs[0x14804>>1] & 0x8000))
- break;
- printf("RAM timings reset to startup values.\n");
- }
- void vid_pollux_init(void)
- {
- struct fb_fix_screeninfo fbfix;
- int i, ret;
- fbdev = open("/dev/fb0", O_RDWR);
- if (fbdev < 0) {
- perror("can't open fbdev");
- exit(1);
- }
- ret = ioctl(fbdev, FBIOGET_FSCREENINFO, &fbfix);
- if (ret == -1) {
- perror("ioctl(fbdev) failed");
- exit(1);
- }
- printf("framebuffer: \"%s\" @ %08lx\n", fbfix.id, fbfix.smem_start);
- fb_paddr[0] = fbfix.smem_start;
- gp2x_screens[0] = mmap(0, 320*240*2*fb_buf_count, PROT_READ|PROT_WRITE,
- MAP_SHARED, memdev, fb_paddr[0]);
- if (gp2x_screens[0] == MAP_FAILED)
- {
- perror("mmap(gp2x_screens) failed");
- exit(1);
- }
- memset(gp2x_screens[0], 0, 320*240*2*fb_buf_count);
- printf(" %p -> %08x\n", gp2x_screens[0], fb_paddr[0]);
- for (i = 1; i < fb_buf_count; i++)
- {
- fb_paddr[i] = fb_paddr[i-1] + 320*240*2;
- gp2x_screens[i] = (char *)gp2x_screens[i-1] + 320*240*2;
- printf(" %p -> %08x\n", gp2x_screens[i], fb_paddr[i]);
- }
- fb_work_buf = 0;
- g_screen_ptr = gp2x_screens[0];
- set_ram_timings_();
- gp2x_video_flip = gp2x_video_flip_;
- gp2x_video_flip2 = gp2x_video_flip2_;
- gp2x_video_changemode_ll = gp2x_video_changemode_ll_;
- gp2x_video_setpalette = gp2x_video_setpalette_;
- gp2x_video_RGB_setscaling = gp2x_video_RGB_setscaling_;
- gp2x_video_wait_vsync = gp2x_video_wait_vsync_;
- }
- void vid_pollux_finish(void)
- {
- munmap(gp2x_screens[0], 320*240*2 * fb_buf_count);
- close(fbdev);
- fbdev = -1;
- unset_ram_timings_();
- }
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