#define BOOT_PLL_ASYNC_MODE 0x02000000
#define BOOT_PLL_2TO1_MODE 0x00008000
+#define TNETD7200_CLOCK_ID_CPU 0
+#define TNETD7200_CLOCK_ID_DSP 1
+#define TNETD7200_CLOCK_ID_USB 2
+
+#define TNETD7200_DEF_CPU_CLK 211000000
+#define TNETD7200_DEF_DSP_CLK 125000000
+#define TNETD7200_DEF_USB_CLK 48000000
+
struct tnetd7300_clock {
volatile u32 ctrl;
#define PREDIV_MASK 0x001f0000
volatile u32 mul;
volatile u32 prediv;
volatile u32 postdiv;
- u32 unused2[7];
+ volatile u32 postdiv2;
+ u32 unused2[6];
volatile u32 cmd;
volatile u32 status;
volatile u32 cmden;
u32 padding[15];
-};
+} __attribute__ ((packed));
struct tnetd7200_clocks {
struct tnetd7200_clock cpu;
struct tnetd7200_clock dsp;
struct tnetd7200_clock usb;
-};
-
-int ar7_afe_clock = 35328000;
-int ar7_ref_clock = 25000000;
-int ar7_xtal_clock = 24000000;
+} __attribute__ ((packed));
int ar7_cpu_clock = 150000000;
EXPORT_SYMBOL(ar7_cpu_clock);
int ar7_dsp_clock = 0;
EXPORT_SYMBOL(ar7_dsp_clock);
-static int gcd(int x, int y)
+static int gcd(int a, int b)
{
- if (x > y)
- return (x % y) ? gcd(y, x % y) : y;
- return (y % x) ? gcd(x, y % x) : x;
-}
+ int c;
-static inline int ABS(int x)
-{
- return (x >= 0) ? x : -x;
+ if (a < b) {
+ c = a;
+ a = b;
+ b = c;
+ }
+ while ((c = (a % b))) {
+ a = b;
+ b = c;
+ }
+ return b;
}
static void approximate(int base, int target, int *prediv,
for (i = 1; i <= 16; i++) {
for (j = 1; j <= 32; j++) {
for (k = 1; k <= 32; k++) {
- freq = ABS(base / j * i / k - target);
+ freq = abs(base / j * i / k - target);
if (freq < res) {
res = freq;
*mul = i;
}
static void calculate(int base, int target, int *prediv, int *postdiv,
- int *mul)
+ int *mul)
{
int tmp_gcd, tmp_base, tmp_freq;
}
static int tnetd7300_get_clock(u32 shift, struct tnetd7300_clock *clock,
- u32 *bootcr, u32 bus_clock)
+ u32 *bootcr, u32 bus_clock)
{
int product;
- int base_clock = ar7_ref_clock;
- int prediv = ((clock->ctrl & PREDIV_MASK) >> PREDIV_SHIFT) + 1;
- int postdiv = (clock->ctrl & POSTDIV_MASK) + 1;
+ int base_clock = AR7_REF_CLOCK;
+ u32 ctrl = clock->ctrl;
+ u32 pll = clock->pll;
+ int prediv = ((ctrl & PREDIV_MASK) >> PREDIV_SHIFT) + 1;
+ int postdiv = (ctrl & POSTDIV_MASK) + 1;
int divisor = prediv * postdiv;
- int mul = ((clock->pll & MUL_MASK) >> MUL_SHIFT) + 1;
+ int mul = ((pll & MUL_MASK) >> MUL_SHIFT) + 1;
switch ((*bootcr & (BOOT_PLL_SOURCE_MASK << shift)) >> shift) {
case BOOT_PLL_SOURCE_BUS:
base_clock = bus_clock;
break;
case BOOT_PLL_SOURCE_REF:
- base_clock = ar7_ref_clock;
+ base_clock = AR7_REF_CLOCK;
break;
case BOOT_PLL_SOURCE_XTAL:
- base_clock = ar7_xtal_clock;
+ base_clock = AR7_XTAL_CLOCK;
break;
case BOOT_PLL_SOURCE_CPU:
base_clock = ar7_cpu_clock;
if (*bootcr & BOOT_PLL_BYPASS)
return base_clock / divisor;
- if ((clock->pll & PLL_MODE_MASK) == 0)
+ if ((pll & PLL_MODE_MASK) == 0)
return (base_clock >> (mul / 16 + 1)) / divisor;
- if ((clock->pll & (PLL_NDIV | PLL_DIV)) == (PLL_NDIV | PLL_DIV)) {
+ if ((pll & (PLL_NDIV | PLL_DIV)) == (PLL_NDIV | PLL_DIV)) {
product = (mul & 1) ?
(base_clock * mul) >> 1 :
(base_clock * (mul - 1)) >> 2;
}
static void tnetd7300_set_clock(u32 shift, struct tnetd7300_clock *clock,
- u32 *bootcr, u32 frequency)
+ u32 *bootcr, u32 frequency)
{
u32 status;
int prediv, postdiv, mul;
base_clock = ar7_bus_clock;
break;
case BOOT_PLL_SOURCE_REF:
- base_clock = ar7_ref_clock;
+ base_clock = AR7_REF_CLOCK;
break;
case BOOT_PLL_SOURCE_XTAL:
- base_clock = ar7_xtal_clock;
+ base_clock = AR7_XTAL_CLOCK;
break;
case BOOT_PLL_SOURCE_CPU:
base_clock = ar7_cpu_clock;
struct tnetd7300_clocks *clocks = (struct tnetd7300_clocks *)ioremap_nocache(AR7_REGS_POWER + 0x20, sizeof(struct tnetd7300_clocks));
ar7_bus_clock = tnetd7300_get_clock(BUS_PLL_SOURCE_SHIFT,
- &clocks->bus, bootcr,
- ar7_afe_clock);
+ &clocks->bus, bootcr, AR7_AFE_CLOCK);
if (*bootcr & BOOT_PLL_ASYNC_MODE) {
ar7_cpu_clock = tnetd7300_get_clock(CPU_PLL_SOURCE_SHIFT,
- &clocks->cpu,
- bootcr, ar7_afe_clock);
+ &clocks->cpu, bootcr, AR7_AFE_CLOCK);
} else {
ar7_cpu_clock = ar7_bus_clock;
}
-
+#if 0
tnetd7300_set_clock(USB_PLL_SOURCE_SHIFT, &clocks->usb,
- bootcr, 48000000);
-
+ bootcr, 48000000);
+#endif
if (ar7_dsp_clock == 250000000)
tnetd7300_set_clock(DSP_PLL_SOURCE_SHIFT, &clocks->dsp,
- bootcr, ar7_dsp_clock);
+ bootcr, ar7_dsp_clock);
iounmap(clocks);
iounmap(bootcr);
}
static int tnetd7200_get_clock(int base, struct tnetd7200_clock *clock,
- u32 *bootcr, u32 bus_clock)
+ u32 *bootcr, u32 bus_clock)
{
int divisor = ((clock->prediv & 0x1f) + 1) *
((clock->postdiv & 0x1f) + 1);
return base * ((clock->mul & 0xf) + 1) / divisor;
}
+
static void tnetd7200_set_clock(int base, struct tnetd7200_clock *clock,
- u32 *bootcr, u32 frequency)
+ int prediv, int postdiv, int postdiv2, int mul, u32 frequency)
{
- u32 status;
- int prediv, postdiv, mul;
-
- calculate(base, frequency, &prediv, &postdiv, &mul);
+ printk("Clocks: base = %d, frequency = %u, prediv = %d, postdiv = %d, postdiv2 = %d, mul = %d\n",
+ base, frequency, prediv, postdiv, postdiv2, mul);
clock->ctrl = 0;
- clock->prediv = DIVISOR_ENABLE_MASK | prediv;
- clock->mul = mul;
- mdelay(1);
- do {
- status = clock->status;
- } while (status & PLL_STATUS);
- clock->postdiv = DIVISOR_ENABLE_MASK | postdiv;
- clock->cmden = 1;
- clock->cmd = 1;
- do {
- status = clock->status;
- } while (status & PLL_STATUS);
- clock->ctrl = 1;
+ clock->prediv = DIVISOR_ENABLE_MASK | ((prediv - 1) & 0x1F);
+ clock->mul = ((mul - 1) & 0xF);
+
+ for(mul = 0; mul < 2000; mul++) /* nop */;
+
+ while(clock->status & 0x1) /* nop */;
+
+ clock->postdiv = DIVISOR_ENABLE_MASK | ((postdiv - 1) & 0x1F);
+
+ clock->cmden |= 1;
+ clock->cmd |= 1;
+
+ while(clock->status & 0x1) /* nop */;
+
+ clock->postdiv2 = DIVISOR_ENABLE_MASK | ((postdiv2 - 1) & 0x1F);
+
+ clock->cmden |= 1;
+ clock->cmd |= 1;
+
+ while(clock->status & 0x1) /* nop */;
+
+ clock->ctrl |= 1;
}
+static int tnetd7200_get_clock_base(int clock_id, u32 *bootcr)
+{
+ if (*bootcr & BOOT_PLL_ASYNC_MODE) {
+ // Async
+ switch (clock_id) {
+ case TNETD7200_CLOCK_ID_DSP:
+ return AR7_REF_CLOCK;
+ default:
+ return AR7_AFE_CLOCK;
+ }
+ } else {
+ // Sync
+ if (*bootcr & BOOT_PLL_2TO1_MODE) {
+ // 2:1
+ switch (clock_id) {
+ case TNETD7200_CLOCK_ID_DSP:
+ return AR7_REF_CLOCK;
+ default:
+ return AR7_AFE_CLOCK;
+ }
+ } else {
+ // 1:1
+ return AR7_REF_CLOCK;
+ }
+ }
+}
+
+
static void __init tnetd7200_init_clocks(void)
{
u32 *bootcr = (u32 *)ioremap_nocache(AR7_REGS_DCL, 4);
struct tnetd7200_clocks *clocks = (struct tnetd7200_clocks *)ioremap_nocache(AR7_REGS_POWER + 0x80, sizeof(struct tnetd7200_clocks));
+ int cpu_base, cpu_mul, cpu_prediv, cpu_postdiv;
+ int dsp_base, dsp_mul, dsp_prediv, dsp_postdiv;
+ int usb_base, usb_mul, usb_prediv, usb_postdiv;
- ar7_cpu_clock = tnetd7200_get_clock(ar7_afe_clock,
- &clocks->cpu,
- bootcr, ar7_afe_clock);
+/*
+ Log from Fritz!Box 7170 Annex B:
+
+ CPU revision is: 00018448
+ Clocks: Async mode
+ Clocks: Setting DSP clock
+ Clocks: prediv: 1, postdiv: 1, mul: 5
+ Clocks: base = 25000000, frequency = 125000000, prediv = 1, postdiv = 2, postdiv2 = 1, mul = 10
+ Clocks: Setting CPU clock
+ Adjusted requested frequency 211000000 to 211968000
+ Clocks: prediv: 1, postdiv: 1, mul: 6
+ Clocks: base = 35328000, frequency = 211968000, prediv = 1, postdiv = 1, postdiv2 = -1, mul = 6
+ Clocks: Setting USB clock
+ Adjusted requested frequency 48000000 to 48076920
+ Clocks: prediv: 13, postdiv: 1, mul: 5
+ Clocks: base = 125000000, frequency = 48000000, prediv = 13, postdiv = 1, postdiv2 = -1, mul = 5
+
+ DSL didn't work if you didn't set the postdiv 2:1 postdiv2 combination, driver hung on startup.
+ Haven't tested this on a synchronous board, neither do i know what to do with ar7_dsp_clock
+*/
+
+ cpu_base = tnetd7200_get_clock_base(TNETD7200_CLOCK_ID_CPU, bootcr);
+ dsp_base = tnetd7200_get_clock_base(TNETD7200_CLOCK_ID_DSP, bootcr);
if (*bootcr & BOOT_PLL_ASYNC_MODE) {
- ar7_bus_clock = 125000000;
+ printk("Clocks: Async mode\n");
+
+ printk("Clocks: Setting DSP clock\n");
+ calculate(dsp_base, TNETD7200_DEF_DSP_CLK, &dsp_prediv, &dsp_postdiv, &dsp_mul);
+ ar7_bus_clock = ((dsp_base / dsp_prediv) * dsp_mul) / dsp_postdiv;
+ tnetd7200_set_clock(dsp_base, &clocks->dsp,
+ dsp_prediv, dsp_postdiv * 2, dsp_postdiv, dsp_mul * 2,
+ ar7_bus_clock);
+
+ printk("Clocks: Setting CPU clock\n");
+ calculate(cpu_base, TNETD7200_DEF_CPU_CLK, &cpu_prediv, &cpu_postdiv, &cpu_mul);
+ ar7_cpu_clock = ((cpu_base / cpu_prediv) * cpu_mul) / cpu_postdiv;
+ tnetd7200_set_clock(cpu_base, &clocks->cpu,
+ cpu_prediv, cpu_postdiv, -1, cpu_mul,
+ ar7_cpu_clock);
+
} else {
if (*bootcr & BOOT_PLL_2TO1_MODE) {
+ printk("Clocks: Sync 2:1 mode\n");
+
+ printk("Clocks: Setting CPU clock\n");
+ calculate(cpu_base, TNETD7200_DEF_CPU_CLK, &cpu_prediv, &cpu_postdiv, &cpu_mul);
+ ar7_cpu_clock = ((cpu_base / cpu_prediv) * cpu_mul) / cpu_postdiv;
+ tnetd7200_set_clock(cpu_base, &clocks->cpu,
+ cpu_prediv, cpu_postdiv, -1, cpu_mul,
+ ar7_cpu_clock);
+
+ printk("Clocks: Setting DSP clock\n");
+ calculate(dsp_base, TNETD7200_DEF_DSP_CLK, &dsp_prediv, &dsp_postdiv, &dsp_mul);
ar7_bus_clock = ar7_cpu_clock / 2;
+ tnetd7200_set_clock(dsp_base, &clocks->dsp,
+ dsp_prediv, dsp_postdiv * 2, dsp_postdiv, dsp_mul * 2,
+ ar7_bus_clock);
} else {
- ar7_bus_clock = ar7_cpu_clock;
+ printk("Clocks: Sync 1:1 mode\n");
+
+ printk("Clocks: Setting DSP clock\n");
+ calculate(dsp_base, TNETD7200_DEF_CPU_CLK, &dsp_prediv, &dsp_postdiv, &dsp_mul);
+ ar7_bus_clock = ((dsp_base / dsp_prediv) * dsp_mul) / dsp_postdiv;
+ tnetd7200_set_clock(dsp_base, &clocks->dsp,
+ dsp_prediv, dsp_postdiv * 2, dsp_postdiv, dsp_mul * 2,
+ ar7_bus_clock);
+
+ ar7_cpu_clock = ar7_bus_clock;
}
}
- tnetd7200_set_clock(ar7_ref_clock * 5, &clocks->usb,
- bootcr, 48000000);
+ printk("Clocks: Setting USB clock\n");
+ usb_base = ar7_bus_clock;
+ calculate(usb_base, TNETD7200_DEF_USB_CLK, &usb_prediv, &usb_postdiv, &usb_mul);
+ tnetd7200_set_clock(usb_base, &clocks->usb,
+ usb_prediv, usb_postdiv, -1, usb_mul,
+ TNETD7200_DEF_USB_CLK);
- if (ar7_dsp_clock == 250000000)
- tnetd7200_set_clock(ar7_ref_clock, &clocks->dsp,
- bootcr, ar7_dsp_clock);
+ #warning FIXME: ????! Hrmm
+ ar7_dsp_clock = ar7_cpu_clock;
iounmap(clocks);
iounmap(bootcr);
{
switch (ar7_chip_id()) {
case AR7_CHIP_7100:
+#warning FIXME: Check if the new 7200 clock init works for 7100
tnetd7200_init_clocks();
break;
case AR7_CHIP_7200:
-#warning FIXME: check revision
- ar7_dsp_clock = 250000000;
tnetd7200_init_clocks();
break;
case AR7_CHIP_7300:
projects / openwrt-10.03 / .git / blobdiff