#include "mx28_init.h"
-uint32_t dram_vals[] = {
- 0x00000000, 0x00000000, 0x00000000, 0x00000000,
- 0x00000000, 0x00000000, 0x00000000, 0x00000000,
- 0x00000000, 0x00000000, 0x00000000, 0x00000000,
- 0x00000000, 0x00000000, 0x00000000, 0x00000000,
- 0x00000000, 0x00000100, 0x00000000, 0x00000000,
- 0x00000000, 0x00000000, 0x00000000, 0x00000000,
- 0x00000000, 0x00000000, 0x00010101, 0x01010101,
- 0x000f0f01, 0x0f02010a, 0x00000000, 0x00010101,
- 0x00000100, 0x00000100, 0x00000000, 0x00000002,
- 0x01010000, 0x05060302, 0x06005003, 0x0a0000c8,
- 0x02009c40, 0x0000030c, 0x0036a609, 0x031a0612,
- 0x02030202, 0x00c8001c, 0x00000000, 0x00000000,
- 0x00012100, 0xffff0303, 0x00012100, 0xffff0303,
- 0x00012100, 0xffff0303, 0x00012100, 0xffff0303,
- 0x00000003, 0x00000000, 0x00000000, 0x00000000,
- 0x00000000, 0x00000000, 0x00000000, 0x00000000,
- 0x00000000, 0x00000000, 0x00000612, 0x01000F02,
- 0x06120612, 0x00000200, 0x00020007, 0xf5014b27,
- 0xf5014b27, 0xf5014b27, 0xf5014b27, 0x07000300,
- 0x07000300, 0x07000300, 0x07000300, 0x00000006,
- 0x00000000, 0x00000000, 0x01000000, 0x01020408,
- 0x08040201, 0x000f1133, 0x00000000, 0x00001f04,
- 0x00001f04, 0x00001f04, 0x00001f04, 0x00001f04,
- 0x00001f04, 0x00001f04, 0x00001f04, 0x00000000,
- 0x00000000, 0x00000000, 0x00000000, 0x00000000,
- 0x00000000, 0x00000000, 0x00000000, 0x00000000,
- 0x00000000, 0x00000000, 0x00000000, 0x00000000,
- 0x00000000, 0x00000000, 0x00000000, 0x00000000,
- 0x00000000, 0x00000000, 0x00000000, 0x00000000,
- 0x00000000, 0x00000000, 0x00000000, 0x00000000,
- 0x00000000, 0x00000000, 0x00000000, 0x00000000,
- 0x00000000, 0x00000000, 0x00000000, 0x00000000,
- 0x00000000, 0x00000000, 0x00000000, 0x00000000,
- 0x00000000, 0x00000000, 0x00000000, 0x00000000,
- 0x00000000, 0x00000000, 0x00000000, 0x00000000,
- 0x00000000, 0x00000000, 0x00000000, 0x00000000,
- 0x00000000, 0x00000000, 0x00000000, 0x00000000,
- 0x00000000, 0x00000000, 0x00000000, 0x00000000,
- 0x00000000, 0x00000000, 0x00000000, 0x00000000,
- 0x00000000, 0x00000000, 0x00000000, 0x00000000,
- 0x00000000, 0x00000000, 0x00010000, 0x00020304,
- 0x00000004, 0x00000000, 0x00000000, 0x00000000,
- 0x00000000, 0x00000000, 0x00000000, 0x01010000,
- 0x01000000, 0x03030000, 0x00010303, 0x01020202,
- 0x00000000, 0x02040303, 0x21002103, 0x00061200,
- 0x06120612, 0x04320432, 0x04320432, 0x00040004,
- 0x00040004, 0x00000000, 0x00000000, 0x00000000,
- 0x00000000, 0x00010001
-};
-
-void init_m28_200mhz_ddr2(void)
-{
- int i;
+extern void mx28_ddr2_setup(void) __attribute__((weak,
+ alias("mx28_ddr2_setup_missing")));
- for (i = 0; i < ARRAY_SIZE(dram_vals); i++)
- writel(dram_vals[i], MXS_DRAM_BASE + (4 * i));
+static void mx28_ddr2_setup_missing(void)
+{
+ serial_puts("platform specific mx28_ddr_setup() is missing\n");
}
-void mx28_mem_init_clock(void)
+static void mx28_mem_init_clock(void)
{
struct mx28_clkctrl_regs *clkctrl_regs =
(struct mx28_clkctrl_regs *)MXS_CLKCTRL_BASE;
writeb(CLKCTRL_FRAC_CLKGATE,
&clkctrl_regs->hw_clkctrl_frac0_clr[CLKCTRL_FRAC0_EMI]);
- early_delay(11000);
/* Set EMI clock divider for EMI clock to 411 / 2 = 205MHz */
writel((2 << CLKCTRL_EMI_DIV_EMI_OFFSET) |
(1 << CLKCTRL_EMI_DIV_XTAL_OFFSET),
&clkctrl_regs->hw_clkctrl_emi);
+ while (readl(&clkctrl_regs->hw_clkctrl_emi) & CLKCTRL_EMI_BUSY_REF_EMI)
+ ;
/* Unbypass EMI */
writel(CLKCTRL_CLKSEQ_BYPASS_EMI,
&clkctrl_regs->hw_clkctrl_clkseq_clr);
-
- early_delay(10000);
}
-void mx28_mem_setup_cpu_and_hbus(void)
+static void mx28_mem_setup_cpu_and_hbus(void)
{
struct mx28_clkctrl_regs *clkctrl_regs =
(struct mx28_clkctrl_regs *)MXS_CLKCTRL_BASE;
&clkctrl_regs->hw_clkctrl_clkseq_set);
/* HBUS = 151MHz */
- writel(CLKCTRL_HBUS_DIV_MASK, &clkctrl_regs->hw_clkctrl_hbus_set);
- writel(((~3) << CLKCTRL_HBUS_DIV_OFFSET) & CLKCTRL_HBUS_DIV_MASK,
- &clkctrl_regs->hw_clkctrl_hbus_clr);
-
- early_delay(10000);
+ clrsetbits_le32(&clkctrl_regs->hw_clkctrl_hbus,
+ CLKCTRL_HBUS_DIV_MASK,
+ 3 << CLKCTRL_HBUS_DIV_OFFSET);
+ while (readl(&clkctrl_regs->hw_clkctrl_hbus) & CLKCTRL_HBUS_ASM_BUSY)
+ ;
/* CPU clock divider = 1 */
clrsetbits_le32(&clkctrl_regs->hw_clkctrl_cpu,
- CLKCTRL_CPU_DIV_CPU_MASK, 1);
+ CLKCTRL_CPU_DIV_CPU_MASK,
+ 1 << CLKCTRL_CPU_DIV_CPU_OFFSET);
+ while (readl(&clkctrl_regs->hw_clkctrl_cpu) & CLKCTRL_CPU_BUSY_REF_CPU)
+ ;
/* Disable CPU bypass */
writel(CLKCTRL_CLKSEQ_BYPASS_CPU,
&clkctrl_regs->hw_clkctrl_clkseq_clr);
-}
-void mx28_mem_setup_vdda(void)
-{
- struct mx28_power_regs *power_regs =
- (struct mx28_power_regs *)MXS_POWER_BASE;
-
- writel((0xc << POWER_VDDACTRL_TRG_OFFSET) |
- (0x7 << POWER_VDDACTRL_BO_OFFSET_OFFSET) |
- POWER_VDDACTRL_LINREG_OFFSET_1STEPS_BELOW,
- &power_regs->hw_power_vddactrl);
+ early_delay(15000);
}
-void mx28_mem_setup_vddd(void)
+#define HW_DIGCTRL_SCRATCH0 0x8001c280
+#define HW_DIGCTRL_SCRATCH1 0x8001c290
+static void data_abort_memdetect_handler(void) __attribute__((naked));
+static void data_abort_memdetect_handler(void)
{
- struct mx28_power_regs *power_regs =
- (struct mx28_power_regs *)MXS_POWER_BASE;
-
- writel((0x1c << POWER_VDDDCTRL_TRG_OFFSET) |
- (0x7 << POWER_VDDDCTRL_BO_OFFSET_OFFSET) |
- POWER_VDDDCTRL_LINREG_OFFSET_1STEPS_BELOW,
- &power_regs->hw_power_vdddctrl);
+ asm volatile("subs pc, r14, #4");
}
-void mx28_mem_get_size(void)
+uint32_t mx28_mem_get_size(void)
{
- struct mx28_digctl_regs *digctl_regs =
- (struct mx28_digctl_regs *)MXS_DIGCTL_BASE;
uint32_t sz, da;
uint32_t *vt = (uint32_t *)0x20;
- /* The following is "subs pc, r14, #4", used as return from DABT. */
- const uint32_t data_abort_memdetect_handler = 0xe25ef004;
/* Replace the DABT handler. */
da = vt[4];
- vt[4] = data_abort_memdetect_handler;
+ vt[4] = (uint32_t)data_abort_memdetect_handler;
sz = get_ram_size((long *)PHYS_SDRAM_1, PHYS_SDRAM_1_SIZE);
- writel(sz, &digctl_regs->hw_digctl_scratch0);
- writel(sz, &digctl_regs->hw_digctl_scratch1);
/* Restore the old DABT handler. */
vt[4] = da;
+
+ return sz;
}
void mx28_mem_init(void)
writel(CLKCTRL_PLL0CTRL0_POWER,
&clkctrl_regs->hw_clkctrl_pll0ctrl0_set);
- early_delay(11000);
+ /* enabling the PLL requires a 10µs delay before use as clk source */
+ early_delay(11);
mx28_mem_init_clock();
- mx28_mem_setup_vdda();
-
/*
* Configure the DRAM registers
*/
/* Clear START bit from DRAM_CTL16 */
clrbits_le32(MXS_DRAM_BASE + 0x40, 1);
- init_m28_200mhz_ddr2();
+ mx28_ddr2_setup();
/* Clear SREFRESH bit from DRAM_CTL17 */
clrbits_le32(MXS_DRAM_BASE + 0x44, 1);
while (!(readl(MXS_DRAM_BASE + 0xe8) & (1 << 20)))
;
- mx28_mem_setup_vddd();
-
- early_delay(10000);
-
mx28_mem_setup_cpu_and_hbus();
-
- mx28_mem_get_size();
}
projects / karo-tx-uboot.git / blobdiff