#include <common.h>
#include <config.h>
#include <asm/io.h>
-#include <asm/arch/iomux-mx28.h>
#include <asm/arch/imx-regs.h>
+#include <asm/arch/sys_proto.h>
+#include <linux/compiler.h>
#include "mxs_init.h"
-static uint32_t mx28_dram_vals[] = {
+static uint32_t dram_vals[] = {
+/*
+ * i.MX28 DDR2 at 200MHz
+ */
+#if defined(CONFIG_MX28)
0x00000000, 0x00000000, 0x00000000, 0x00000000,
0x00000000, 0x00000000, 0x00000000, 0x00000000,
0x00000000, 0x00000000, 0x00000000, 0x00000000,
0x06120612, 0x04320432, 0x04320432, 0x00040004,
0x00040004, 0x00000000, 0x00000000, 0x00000000,
0x00000000, 0x00010001
+
+/*
+ * i.MX23 DDR at 133MHz
+ */
+#elif defined(CONFIG_MX23)
+ 0x01010001, 0x00010100, 0x01000101, 0x00000001,
+ 0x00000101, 0x00000000, 0x00010000, 0x01000001,
+ 0x00000000, 0x00000001, 0x07000200, 0x00070202,
+ 0x02020000, 0x04040a01, 0x00000201, 0x02040000,
+ 0x02000000, 0x19000f08, 0x0d0d0000, 0x02021313,
+ 0x02061521, 0x0000000a, 0x00080008, 0x00200020,
+ 0x00200020, 0x00200020, 0x000003f7, 0x00000000,
+ 0x00000000, 0x00000020, 0x00000020, 0x00c80000,
+ 0x000a23cd, 0x000000c8, 0x00006665, 0x00000000,
+ 0x00000101, 0x00040001, 0x00000000, 0x00000000,
+ 0x00010000
+#else
+#error Unsupported memory initialization
+#endif
};
-void __mxs_adjust_memory_params(uint32_t *dram_vals)
+__weak void mxs_adjust_memory_params(uint32_t *dram_vals)
{
}
-void mxs_adjust_memory_params(uint32_t *dram_vals)
- __attribute__((weak, alias("__mxs_adjust_memory_params")));
-void init_mx28_200mhz_ddr2(void)
+static void initialize_dram_values(void)
{
int i;
- mxs_adjust_memory_params(mx28_dram_vals);
+ mxs_adjust_memory_params(dram_vals);
+
+ for (i = 0; i < ARRAY_SIZE(dram_vals); i++)
+ writel(dram_vals[i], MXS_DRAM_BASE + (4 * i));
- for (i = 0; i < ARRAY_SIZE(mx28_dram_vals); i++)
- writel(mx28_dram_vals[i], MXS_DRAM_BASE + (4 * i));
+#ifdef CONFIG_MX23
+ /*
+ * Enable tRAS lockout in HW_DRAM_CTL08 ; it must be the last
+ * element to be set
+ */
+ writel((1 << 24), MXS_DRAM_BASE + (4 * 8));
+#endif
}
-void mxs_mem_init_clock(void)
+static void mxs_mem_init_clock(void)
{
struct mxs_clkctrl_regs *clkctrl_regs =
(struct mxs_clkctrl_regs *)MXS_CLKCTRL_BASE;
+#if defined(CONFIG_MX23)
+ /* Fractional divider for ref_emi is 33 ; 480 * 18 / 33 = 266MHz */
+ const unsigned char divider = 33;
+#elif defined(CONFIG_MX28)
+ /* Fractional divider for ref_emi is 21 ; 480 * 18 / 21 = 411MHz */
+ const unsigned char divider = 21;
+#endif
/* Gate EMI clock */
writeb(CLKCTRL_FRAC_CLKGATE,
&clkctrl_regs->hw_clkctrl_frac0_set[CLKCTRL_FRAC0_EMI]);
- /* Set fractional divider for ref_emi to 480 * 18 / 21 = 411MHz */
- writeb(CLKCTRL_FRAC_CLKGATE | (21 & CLKCTRL_FRAC_FRAC_MASK),
+ /* Set fractional divider for ref_emi */
+ writeb(CLKCTRL_FRAC_CLKGATE | (divider & CLKCTRL_FRAC_FRAC_MASK),
&clkctrl_regs->hw_clkctrl_frac0[CLKCTRL_FRAC0_EMI]);
/* Ungate EMI clock */
early_delay(10000);
}
-void mxs_mem_setup_cpu_and_hbus(void)
+static void mxs_mem_setup_cpu_and_hbus(void)
{
struct mxs_clkctrl_regs *clkctrl_regs =
(struct mxs_clkctrl_regs *)MXS_CLKCTRL_BASE;
early_delay(15000);
}
-void mxs_mem_setup_vdda(void)
+static void mxs_mem_setup_vdda(void)
{
struct mxs_power_regs *power_regs =
(struct mxs_power_regs *)MXS_POWER_BASE;
&power_regs->hw_power_vddactrl);
}
-void mxs_mem_setup_vddd(void)
-{
- struct mxs_power_regs *power_regs =
- (struct mxs_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);
-}
-
uint32_t mxs_mem_get_size(void)
{
uint32_t sz, da;
return sz;
}
-void mxs_mem_init(void)
+#ifdef CONFIG_MX23
+static void mx23_mem_setup_vddmem(void)
+{
+ struct mxs_power_regs *power_regs =
+ (struct mxs_power_regs *)MXS_POWER_BASE;
+
+ writel((0x10 << POWER_VDDMEMCTRL_TRG_OFFSET) |
+ POWER_VDDMEMCTRL_ENABLE_ILIMIT |
+ POWER_VDDMEMCTRL_ENABLE_LINREG |
+ POWER_VDDMEMCTRL_PULLDOWN_ACTIVE,
+ &power_regs->hw_power_vddmemctrl);
+
+ early_delay(10000);
+
+ writel((0x10 << POWER_VDDMEMCTRL_TRG_OFFSET) |
+ POWER_VDDMEMCTRL_ENABLE_LINREG,
+ &power_regs->hw_power_vddmemctrl);
+}
+
+static void mx23_mem_init(void)
+{
+ /*
+ * Reset/ungate the EMI block. This is essential, otherwise the system
+ * suffers from memory instability. This thing is mx23 specific and is
+ * no longer present on mx28.
+ */
+ mxs_reset_block((struct mxs_register_32 *)MXS_EMI_BASE);
+
+ mx23_mem_setup_vddmem();
+
+ /*
+ * Configure the DRAM registers
+ */
+
+ /* Clear START and SREFRESH bit from DRAM_CTL8 */
+ clrbits_le32(MXS_DRAM_BASE + 0x20, (1 << 16) | (1 << 8));
+
+ initialize_dram_values();
+
+ /* Set START bit in DRAM_CTL16 */
+ setbits_le32(MXS_DRAM_BASE + 0x20, 1 << 16);
+
+ clrbits_le32(MXS_DRAM_BASE + 0x40, 1 << 17);
+ early_delay(20000);
+
+ /* Adjust EMI port priority. */
+ clrsetbits_le32(0x80020000, 0x1f << 16, 0x8);
+ early_delay(20000);
+
+ setbits_le32(MXS_DRAM_BASE + 0x40, 1 << 19);
+ setbits_le32(MXS_DRAM_BASE + 0x40, 1 << 11);
+
+ /* Wait for bit 10 (DRAM init complete) in DRAM_CTL18 */
+ while (!(readl(MXS_DRAM_BASE + 0x48) & (1 << 10)))
+ ;
+}
+#endif
+
+#ifdef CONFIG_MX28
+static void mx28_mem_init(void)
{
- struct mxs_clkctrl_regs *clkctrl_regs =
- (struct mxs_clkctrl_regs *)MXS_CLKCTRL_BASE;
struct mxs_pinctrl_regs *pinctrl_regs =
(struct mxs_pinctrl_regs *)MXS_PINCTRL_BASE;
writel(PINCTRL_EMI_DS_CTRL_DDR_MODE_DDR2,
&pinctrl_regs->hw_pinctrl_emi_ds_ctrl_set);
- /* Power up PLL0 */
- writel(CLKCTRL_PLL0CTRL0_POWER,
- &clkctrl_regs->hw_clkctrl_pll0ctrl0_set);
-
- early_delay(11000);
-
- mxs_mem_init_clock();
-
- mxs_mem_setup_vdda();
-
/*
* Configure the DRAM registers
*/
/* Clear START bit from DRAM_CTL16 */
clrbits_le32(MXS_DRAM_BASE + 0x40, 1);
- init_mx28_200mhz_ddr2();
+ initialize_dram_values();
/* Clear SREFRESH bit from DRAM_CTL17 */
clrbits_le32(MXS_DRAM_BASE + 0x44, 1);
/* Wait for bit 20 (DRAM init complete) in DRAM_CTL58 */
while (!(readl(MXS_DRAM_BASE + 0xe8) & (1 << 20)))
;
+}
+#endif
+
+void mxs_mem_init(void)
+{
+ early_delay(11000);
+
+ mxs_mem_init_clock();
+
+ mxs_mem_setup_vdda();
- mxs_mem_setup_vddd();
+#if defined(CONFIG_MX23)
+ mx23_mem_init();
+#elif defined(CONFIG_MX28)
+ mx28_mem_init();
+#endif
early_delay(10000);
projects / karo-tx-uboot.git / blobdiff