+/*
+ * <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 <math.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <fcntl.h>
+#include <sys/mman.h>
+#include <unistd.h>
+#include <sys/ioctl.h>
+#include <linux/fb.h>
+
+#include "soc.h"
+#include "plat_gp2x.h"
+#include "../common/emu.h"
+#include "../common/plat.h"
+#include "../common/arm_utils.h"
+#include "pollux_set.h"
+
+static volatile unsigned short *memregs;
+static volatile unsigned int *memregl;
+static int memdev = -1;
+static int battdev = -1;
+
+extern void *gp2x_screens[4];
+
+#define fb_buf_count 4
+static unsigned int fb_paddr[fb_buf_count];
+static int fb_work_buf;
+static int fbdev = -1;
+
+static char cpuclk_was_changed = 0;
+static unsigned short memtimex_old[2];
+static unsigned int pllsetreg0;
+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;
+}
+
+/* CPU clock */
+static void gp2x_set_cpuclk_(unsigned int mhz)
+{
+ char buff[24];
+ snprintf(buff, sizeof(buff), "cpuclk=%u", mhz);
+ pollux_set(memregs, buff);
+
+ cpuclk_was_changed = 1;
+}
+
+/* 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");
+}
+
+/* LCD refresh */
+static void set_lcd_custom_rate_(int is_pal)
+{
+ /* just remember PAL/NTSC. We always set timings in _changemode_ll() */
+ last_pal_setting = is_pal;
+}
+
+static void unset_lcd_custom_rate_(void)
+{
+}
+
+static void set_lcd_gamma_(int g100, int A_SNs_curve)
+{
+ /* hm, the LCD possibly can do it (but not POLLUX) */
+}
+
+static int gp2x_read_battery_(void)
+{
+ unsigned short magic_val = 0;
+
+ if (battdev < 0)
+ return -1;
+ if (read(battdev, &magic_val, sizeof(magic_val)) != sizeof(magic_val))
+ return -1;
+ switch (magic_val) {
+ default:
+ case 1: return 100;
+ case 2: return 66;
+ case 3: return 40;
+ case 4: return 0;
+ }
+}
+
+#define TIMER_BASE3 0x1980
+#define TIMER_REG(x) memregl[(TIMER_BASE3 + x) >> 2]
+
+unsigned int gp2x_get_ticks_us_(void)
+{
+ TIMER_REG(0x08) = 0x4b; /* run timer, latch value */
+ return TIMER_REG(0);
+}
+
+unsigned int gp2x_get_ticks_ms_(void)
+{
+ /* approximate /= 1000 */
+ unsigned long long v64;
+ v64 = (unsigned long long)gp2x_get_ticks_us_() * 4294968;
+ return v64 >> 32;
+}
+
+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 */
+}
+
+/* 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;
+}
void pollux_init(void)
{
+ struct fb_fix_screeninfo fbfix;
+ int i, ret, rate;
+
+ 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);
+ rate /= 1000000;
+
+ /* setup timer */
+ if (1 <= rate && rate <= 256) {
+ if (TIMER_REG(0x08) & 8) {
+ fprintf(stderr, "warning: timer in use, overriding!\n");
+ timer_cleanup();
+ }
+
+ TIMER_REG(0x44) = ((rate - 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 = 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;
+ memregl[0xf07c>>2] |= 0x8000;
+ }
+
+ munmap((void *)memregs, 0x20000);
+ close(memdev);
+ if (battdev >= 0)
+ close(battdev);
}
notaz.gp2x.de / libpicofe.git / blobdiff