-void pollux_init(void)
-{
- struct fb_fix_screeninfo fbfix;
- int i, ret, rate, timer_div;
-
- memdev = open("/dev/mem", O_RDWR);
- if (memdev == -1) {
- perror("open(/dev/mem) failed");
- exit(1);
- }
-
- memregs = mmap(0, 0x20000, PROT_READ|PROT_WRITE, MAP_SHARED, memdev, 0xc0000000);
- if (memregs == MAP_FAILED) {
- perror("mmap(memregs) failed");
- exit(1);
- }
- memregl = (volatile void *)memregs;
-
- 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];
-
- battdev = open("/dev/pollux_batt", O_RDONLY);
- if (battdev < 0)
- perror("Warning: could't open pollux_batt");
-
- /* find what PLL1 runs at, for the timer */
- rate = decode_pll(memregl[0xf008>>2]);
- printf("PLL1 @ %dHz\n", rate);
-
- /* setup timer */
- timer_div = (rate + 500000) / 1000000;
- if (1 <= timer_div && timer_div <= 256) {
- timer_drift = (rate - (timer_div * 1000000)) / timer_div;
-
- if (TIMER_REG(0x08) & 8) {
- fprintf(stderr, "warning: timer in use, overriding!\n");
- timer_cleanup();
- }
-
- TIMER_REG(0x44) = ((timer_div - 1) << 4) | 2; /* using PLL1, divide by it's rate */
- TIMER_REG(0x40) = 0x0c; /* clocks on */
- TIMER_REG(0x08) = 0x6b; /* run timer, clear irq, latch value */
-
- gp2x_get_ticks_ms = gp2x_get_ticks_ms_;
- gp2x_get_ticks_us = gp2x_get_ticks_us_;
- }
- else {
- fprintf(stderr, "warning: could not make use of timer\n");
-
- // those functions are actually not good at all on Wiz kernel
- gp2x_get_ticks_ms = plat_get_ticks_ms_good;
- gp2x_get_ticks_us = plat_get_ticks_us_good;
- }
-
- pllsetreg0_old = memregl[0xf004>>2];
- memtimex_old[0] = memregs[0x14802>>1];
- memtimex_old[1] = memregs[0x14804>>1];
-
- 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_;
-
- /* some firmwares have sys clk on PLL0, we can't adjust CPU clock
- * by reprogramming the PLL0 then, as it overclocks system bus */
- if ((memregl[0xf000>>2] & 0x03000030) == 0x01000000)
- gp2x_set_cpuclk = gp2x_set_cpuclk_;
- else {
- fprintf(stderr, "unexpected PLL config (%08x), overclocking disabled\n",
- memregl[0xf000>>2]);
- gp2x_set_cpuclk = NULL;
- }
-
- set_lcd_custom_rate = set_lcd_custom_rate_;
- unset_lcd_custom_rate = unset_lcd_custom_rate_;
- set_lcd_gamma = set_lcd_gamma_;
-
- set_ram_timings = set_ram_timings_;
- unset_ram_timings = unset_ram_timings_;
- gp2x_read_battery = gp2x_read_battery_;
-}
-
-void pollux_finish(void)
-{
- /* switch to default fb mem, turn portrait off */
- memregl[0x406C>>2] = fb_paddr[0];
- memregl[0x4058>>2] |= 0x10;
- close(fbdev);
-
- gp2x_video_changemode_ll_(16);
- unset_ram_timings_();
- if (cpuclk_was_changed) {
- memregl[0xf004>>2] = pllsetreg0_old;
- memregl[0xf07c>>2] |= 0x8000;
- }
- timer_cleanup();
-
- munmap((void *)memregs, 0x20000);
- close(memdev);
- if (battdev >= 0)
- close(battdev);
-}
-#endif
-
-/* note: both PLLs are programmed the same way,
- * the databook incorrectly states that PLL1 differs */
-static int decode_pll(unsigned int reg)
-{
- long long v;
- int p, m, s;
-
- p = (reg >> 18) & 0x3f;
- m = (reg >> 8) & 0x3ff;
- s = reg & 0xff;
-
- if (p == 0)
- p = 1;
-
- v = 27000000; // master clock
- v = v * m / (p << s);
- return v;
-}
-
-#define TIMER_BASE3 0x1980
-#define TIMER_REG(x) memregl[(TIMER_BASE3 + x) >> 2]
-
-static void timer_cleanup(void)
-{
- TIMER_REG(0x40) = 0x0c; /* be sure clocks are on */
- TIMER_REG(0x08) = 0x23; /* stop the timer, clear irq in case it's pending */
- TIMER_REG(0x00) = 0; /* clear counter */
- TIMER_REG(0x40) = 0; /* clocks off */
- TIMER_REG(0x44) = 0; /* dividers back to default */
-}
-
-static void save_multiple_regs(unsigned int *dest, int base, int count)
-{
- const volatile unsigned int *regs = memregl + base / 4;
- int i;
-
- for (i = 0; i < count; i++)
- dest[i] = regs[i];
-}
-
-static void restore_multiple_regs(int base, const unsigned int *src, int count)
-{
- volatile unsigned int *regs = memregl + base / 4;
- int i;
-
- for (i = 0; i < count; i++)
- regs[i] = src[i];
-}
-