[U-Boot] [PATCH v3 03/11] sun6i: Add clock functions needed for SPL / DRAM init
Hans de Goede
hdegoede at redhat.com
Fri Nov 7 20:47:01 CET 2014
Add clock_init_safe and clockset_pll5 functions, as these are needed for
SPL support resp. DRAM init (which is needed for SPL too).
Also add some extra clock register constant defines.
Signed-off-by: Hans de Goede <hdegoede at redhat.com>
---
arch/arm/cpu/armv7/sunxi/clock_sun6i.c | 77 +++++++++++++++++++++++++++
arch/arm/include/asm/arch-sunxi/clock.h | 1 +
arch/arm/include/asm/arch-sunxi/clock_sun6i.h | 27 +++++++++-
arch/arm/include/asm/arch-sunxi/prcm.h | 1 +
include/configs/sun6i.h | 1 +
5 files changed, 106 insertions(+), 1 deletion(-)
diff --git a/arch/arm/cpu/armv7/sunxi/clock_sun6i.c b/arch/arm/cpu/armv7/sunxi/clock_sun6i.c
index 1eae976..16ab6f3 100644
--- a/arch/arm/cpu/armv7/sunxi/clock_sun6i.c
+++ b/arch/arm/cpu/armv7/sunxi/clock_sun6i.c
@@ -16,6 +16,33 @@
#include <asm/arch/prcm.h>
#include <asm/arch/sys_proto.h>
+#ifdef CONFIG_SPL_BUILD
+void clock_init_safe(void)
+{
+ struct sunxi_ccm_reg * const ccm =
+ (struct sunxi_ccm_reg *)SUNXI_CCM_BASE;
+ struct sunxi_prcm_reg * const prcm =
+ (struct sunxi_prcm_reg *)SUNXI_PRCM_BASE;
+
+ /* Set PLL ldo voltage without this PLL6 does not work properly */
+ clrsetbits_le32(&prcm->pll_ctrl1, PRCM_PLL_CTRL_LDO_KEY_MASK,
+ PRCM_PLL_CTRL_LDO_KEY);
+ clrsetbits_le32(&prcm->pll_ctrl1, ~PRCM_PLL_CTRL_LDO_KEY_MASK,
+ PRCM_PLL_CTRL_LDO_DIGITAL_EN | PRCM_PLL_CTRL_LDO_ANALOG_EN |
+ PRCM_PLL_CTRL_EXT_OSC_EN | PRCM_PLL_CTRL_LDO_OUT_L(1140));
+ clrbits_le32(&prcm->pll_ctrl1, PRCM_PLL_CTRL_LDO_KEY_MASK);
+
+ clock_set_pll1(408000000);
+
+ writel(AHB1_ABP1_DIV_DEFAULT, &ccm->ahb1_apb1_div);
+
+ writel(PLL6_CFG_DEFAULT, &ccm->pll6_cfg);
+
+ writel(MBUS_CLK_DEFAULT, &ccm->mbus0_clk_cfg);
+ writel(MBUS_CLK_DEFAULT, &ccm->mbus1_clk_cfg);
+}
+#endif
+
void clock_init_uart(void)
{
struct sunxi_ccm_reg *const ccm =
@@ -65,6 +92,56 @@ int clock_twi_onoff(int port, int state)
return 0;
}
+#ifdef CONFIG_SPL_BUILD
+void clock_set_pll1(unsigned int clk)
+{
+ struct sunxi_ccm_reg * const ccm =
+ (struct sunxi_ccm_reg *)SUNXI_CCM_BASE;
+ int k = 1;
+ int m = 1;
+
+ if (clk > 1152000000) {
+ k = 2;
+ } else if (clk > 768000000) {
+ k = 3;
+ m = 2;
+ }
+
+ /* Switch to 24MHz clock while changing PLL1 */
+ writel(AXI_DIV_3 << AXI_DIV_SHIFT |
+ ATB_DIV_2 << ATB_DIV_SHIFT |
+ CPU_CLK_SRC_OSC24M << CPU_CLK_SRC_SHIFT,
+ &ccm->cpu_axi_cfg);
+
+ /* PLL1 rate = 24000000 * n * k / m */
+ writel(CCM_PLL1_CTRL_EN | CCM_PLL1_CTRL_MAGIC |
+ CCM_PLL1_CTRL_N(clk / (24000000 * k / m)) |
+ CCM_PLL1_CTRL_K(k) | CCM_PLL1_CTRL_M(m), &ccm->pll1_cfg);
+ sdelay(200);
+
+ /* Switch CPU to PLL1 */
+ writel(AXI_DIV_3 << AXI_DIV_SHIFT |
+ ATB_DIV_2 << ATB_DIV_SHIFT |
+ CPU_CLK_SRC_PLL1 << CPU_CLK_SRC_SHIFT,
+ &ccm->cpu_axi_cfg);
+}
+#endif
+
+void clock_set_pll5(unsigned int clk)
+{
+ struct sunxi_ccm_reg * const ccm =
+ (struct sunxi_ccm_reg *)SUNXI_CCM_BASE;
+ const int k = 2;
+ const int m = 1;
+
+ /* PLL5 rate = 24000000 * n * k / m */
+ writel(CCM_PLL5_CTRL_EN | CCM_PLL5_CTRL_UPD |
+ CCM_PLL5_CTRL_N(clk / (24000000 * k / m)) |
+ CCM_PLL5_CTRL_K(k) | CCM_PLL5_CTRL_M(m), &ccm->pll5_cfg);
+
+ udelay(5500);
+}
+
unsigned int clock_get_pll6(void)
{
struct sunxi_ccm_reg *const ccm =
diff --git a/arch/arm/include/asm/arch-sunxi/clock.h b/arch/arm/include/asm/arch-sunxi/clock.h
index 42382a8..b40c16b 100644
--- a/arch/arm/include/asm/arch-sunxi/clock.h
+++ b/arch/arm/include/asm/arch-sunxi/clock.h
@@ -25,6 +25,7 @@
int clock_init(void);
int clock_twi_onoff(int port, int state);
void clock_set_pll1(unsigned int hz);
+void clock_set_pll5(unsigned int hz);
unsigned int clock_get_pll5p(void);
unsigned int clock_get_pll6(void);
void clock_init_safe(void);
diff --git a/arch/arm/include/asm/arch-sunxi/clock_sun6i.h b/arch/arm/include/asm/arch-sunxi/clock_sun6i.h
index 1397b35..4992dbc 100644
--- a/arch/arm/include/asm/arch-sunxi/clock_sun6i.h
+++ b/arch/arm/include/asm/arch-sunxi/clock_sun6i.h
@@ -170,7 +170,17 @@ struct sunxi_ccm_reg {
#define CPU_CLK_SRC_OSC24M 1
#define CPU_CLK_SRC_PLL1 2
-#define PLL1_CFG_DEFAULT 0x90011b21
+#define CCM_PLL1_CTRL_M(n) ((((n) - 1) & 0x3) << 0)
+#define CCM_PLL1_CTRL_K(n) ((((n) - 1) & 0x3) << 4)
+#define CCM_PLL1_CTRL_N(n) ((((n) - 1) & 0x1f) << 8)
+#define CCM_PLL1_CTRL_MAGIC (0x1 << 16)
+#define CCM_PLL1_CTRL_EN (0x1 << 31)
+
+#define CCM_PLL5_CTRL_M(n) ((((n) - 1) & 0x3) << 0)
+#define CCM_PLL5_CTRL_K(n) ((((n) - 1) & 0x3) << 4)
+#define CCM_PLL5_CTRL_N(n) ((((n) - 1) & 0x1f) << 8)
+#define CCM_PLL5_CTRL_UPD (0x1 << 20)
+#define CCM_PLL5_CTRL_EN (0x1 << 31)
#define PLL6_CFG_DEFAULT 0x90041811
@@ -179,6 +189,11 @@ struct sunxi_ccm_reg {
#define CCM_PLL6_CTRL_K_SHIFT 4
#define CCM_PLL6_CTRL_K_MASK (0x3 << CCM_PLL6_CTRL_K_SHIFT)
+#define AHB1_ABP1_DIV_DEFAULT 0x00002020
+
+#define AXI_GATE_OFFSET_DRAM 0
+
+#define AHB_GATE_OFFSET_MCTL 14
#define AHB_GATE_OFFSET_MMC3 11
#define AHB_GATE_OFFSET_MMC2 10
#define AHB_GATE_OFFSET_MMC1 9
@@ -190,6 +205,16 @@ struct sunxi_ccm_reg {
#define CCM_MMC_CTRL_ENABLE (0x1 << 31)
+#define MDFS_CLK_DEFAULT 0x81000002 /* PLL6 / 3 */
+
+#define CCM_DRAMCLK_CFG_DIV0(x) ((x - 1) << 8)
+#define CCM_DRAMCLK_CFG_DIV0_MASK (0xf << 8)
+#define CCM_DRAMCLK_CFG_UPD (0x1 << 16)
+#define CCM_DRAMCLK_CFG_RST (0x1 << 31)
+
+#define MBUS_CLK_DEFAULT 0x81000001 /* PLL6 / 2 */
+
+#define AHB_RESET_OFFSET_MCTL 14
#define AHB_RESET_OFFSET_MMC3 11
#define AHB_RESET_OFFSET_MMC2 10
#define AHB_RESET_OFFSET_MMC1 9
diff --git a/arch/arm/include/asm/arch-sunxi/prcm.h b/arch/arm/include/asm/arch-sunxi/prcm.h
index 3d3bfa6..88de1ff 100644
--- a/arch/arm/include/asm/arch-sunxi/prcm.h
+++ b/arch/arm/include/asm/arch-sunxi/prcm.h
@@ -119,6 +119,7 @@
#define PRCM_PLL_CTRL_LDO_OUT_HV(n) \
__PRCM_PLL_CTRL_VDD_LDO_OUT((((n) & 0x7) * 30) + 1160)
#define PRCM_PLL_CTRL_LDO_KEY (0xa7 << 24)
+#define PRCM_PLL_CTRL_LDO_KEY_MASK (0xff << 24)
#define PRCM_CLK_1WIRE_GATE (0x1 << 31)
diff --git a/include/configs/sun6i.h b/include/configs/sun6i.h
index b714474..9558771 100644
--- a/include/configs/sun6i.h
+++ b/include/configs/sun6i.h
@@ -14,6 +14,7 @@
/*
* A31 specific configuration
*/
+#define CONFIG_CLK_FULL_SPEED 1008000000
#define CONFIG_SYS_PROMPT "sun6i# "
--
2.1.0
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