#include <unistd.h>
#include <sys/ioctl.h>
#include <linux/fb.h>
+#include <linux/soundcard.h>
#include "soc.h"
#include "plat_gp2x.h"
-#include "../emu.h"
#include "../plat.h"
-#include "../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;
+volatile unsigned short *memregs;
+volatile unsigned int *memregl;
+int memdev = -1;
+int gp2x_dev_id;
+static int battdev = -1, mixerdev = -1;
+static int cpu_clock_allowed;
+static unsigned int saved_video_regs[2][6];
+
+#ifndef ARRAY_SIZE
+#define ARRAY_SIZE(x) (sizeof(x) / sizeof(x[0]))
+#endif
+
+// TODO FIXME: merge
+#if 0
extern void *gp2x_screens[4];
#define fb_buf_count 4
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;
-}
-
int pollux_get_real_snd_rate(int req_rate)
{
int clk0_src, clk1_src, rate, div;
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];
+}
+
+/* newer API */
+static int pollux_cpu_clock_get(void)
+{
+ return decode_pll(memregl[0xf004>>2]) / 1000000;
+}
+
+int pollux_cpu_clock_set(int mhz)
+{
+ int adiv, mdiv, pdiv, sdiv = 0;
+ int i, vf000, vf004;
+
+ if (!cpu_clock_allowed)
+ return -1;
+ if (mhz == pollux_cpu_clock_get())
+ return 0;
+
+ // m = MDIV, p = PDIV, s = SDIV
+ #define SYS_CLK_FREQ 27
+ pdiv = 9;
+ mdiv = (mhz * pdiv) / SYS_CLK_FREQ;
+ if (mdiv & ~0x3ff)
+ return -1;
+ vf004 = (pdiv<<18) | (mdiv<<8) | sdiv;
+
+ // attempt to keep the AHB divider close to 250, but not higher
+ for (adiv = 1; mhz / adiv > 250; adiv++)
+ ;
+
+ vf000 = memregl[0xf000>>2];
+ vf000 = (vf000 & ~0x3c0) | ((adiv - 1) << 6);
+ memregl[0xf000>>2] = vf000;
+ memregl[0xf004>>2] = vf004;
+ memregl[0xf07c>>2] |= 0x8000;
+ for (i = 0; (memregl[0xf07c>>2] & 0x8000) && i < 0x100000; i++)
+ ;
+
+ printf("clock set to %dMHz, AHB set to %dMHz\n", mhz, mhz / adiv);
+ return 0;
+}
+
+static int pollux_bat_capacity_get(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;
+ }
+}
+
+static int step_volume(int is_up)
+{
+ static int volume = 50;
+ int ret, val;
+
+ if (mixerdev < 0)
+ return -1;
+
+ if (is_up) {
+ volume += 5;
+ if (volume > 255) volume = 255;
+ }
+ else {
+ volume -= 5;
+ if (volume < 0) volume = 0;
+ }
+ val = volume;
+ val |= val << 8;
+
+ ret = ioctl(mixerdev, SOUND_MIXER_WRITE_PCM, &val);
+ if (ret == -1)
+ perror("WRITE_PCM");
+
+ return ret;
+}
+
+struct plat_target plat_target = {
+ pollux_cpu_clock_get,
+ pollux_cpu_clock_set,
+ pollux_bat_capacity_get,
+
+ .step_volume = step_volume,
+};
+
+int plat_target_init(void)
+{
+ int rate, timer_div, timer_div2;
+ FILE *f;
+
+ 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;
+
+ // save video regs of both MLCs
+ save_multiple_regs(saved_video_regs[0], 0x4058, ARRAY_SIZE(saved_video_regs[0]));
+ save_multiple_regs(saved_video_regs[1], 0x4458, ARRAY_SIZE(saved_video_regs[1]));
+
+ /* 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)
+ cpu_clock_allowed = 1;
+ else {
+ cpu_clock_allowed = 0;
+ fprintf(stderr, "unexpected PLL config (%08x), overclocking disabled\n",
+ memregl[0xf000>>2]);
+ }
+
+ /* 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;
+ timer_div2 = 0;
+ while (timer_div > 256) {
+ timer_div /= 2;
+ timer_div2++;
+ }
+ if (1 <= timer_div && timer_div <= 256 && timer_div2 < 4) {
+ int timer_rate = (rate >> timer_div2) / timer_div;
+ if (TIMER_REG(0x08) & 8) {
+ fprintf(stderr, "warning: timer in use, overriding!\n");
+ timer_cleanup();
+ }
+ if (timer_rate != 1000000)
+ fprintf(stderr, "warning: timer drift %d us\n", timer_rate - 1000000);
+
+ timer_div2 = (timer_div2 + 3) & 3;
+ TIMER_REG(0x44) = ((timer_div - 1) << 4) | 2; /* using PLL1 */
+ TIMER_REG(0x40) = 0x0c; /* clocks on */
+ TIMER_REG(0x08) = 0x68 | timer_div2; /* run timer, clear irq, latch value */
+ }
+ else
+ fprintf(stderr, "warning: could not make use of timer\n");
+
+ battdev = open("/dev/pollux_batt", O_RDONLY);
+ if (battdev < 0)
+ perror("Warning: could't open pollux_batt");
+
+ f = fopen("/dev/accel", "rb");
+ if (f) {
+ printf("detected Caanoo\n");
+ gp2x_dev_id = GP2X_DEV_CAANOO;
+ fclose(f);
+ }
+ else {
+ printf("detected Wiz\n");
+ gp2x_dev_id = GP2X_DEV_WIZ;
+ }
+
+ mixerdev = open("/dev/mixer", O_RDWR);
+ if (mixerdev == -1)
+ perror("open(/dev/mixer)");
+
+ return 0;
+}
+
+/* to be called after in_probe */
+void plat_target_setup_input(void)
+{
+}
+void plat_target_finish(void)
+{
+ timer_cleanup();
+
+ restore_multiple_regs(0x4058, saved_video_regs[0],
+ ARRAY_SIZE(saved_video_regs[0]));
+ restore_multiple_regs(0x4458, saved_video_regs[1],
+ ARRAY_SIZE(saved_video_regs[1]));
+ memregl[0x4058>>2] |= 0x10;
+ memregl[0x4458>>2] |= 0x10;
+
+ if (battdev >= 0)
+ close(battdev);
+ if (mixerdev >= 0)
+ close(mixerdev);
+ munmap((void *)memregs, 0x20000);
+ close(memdev);
+}
notaz.gp2x.de / libpicofe.git / commitdiff