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authorMatt Porter <mporter@ti.com>2013-03-20 05:38:11 +0000
committerTom Rini <trini@ti.com>2013-05-10 08:25:54 -0400
commit035d563937b5bafbf78b17e07ac50bca47492385 (patch)
tree7bce2fdecf239c31090bb9f003dcd4f7e2f408ad /arch/arm/cpu
parent8934f7846501070a5b01c1fab5db27559e9d70d1 (diff)
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am33xx: add pll and clock support for TI814x CPSW
Enables required PLLs and clocks for CPSW on TI814x. Signed-off-by: Matt Porter <mporter@ti.com> Reviewed-by: Tom Rini <trini@ti.com>
Diffstat (limited to 'arch/arm/cpu')
-rw-r--r--arch/arm/cpu/armv7/am33xx/clock_ti814x.c103
1 files changed, 101 insertions, 2 deletions
diff --git a/arch/arm/cpu/armv7/am33xx/clock_ti814x.c b/arch/arm/cpu/armv7/am33xx/clock_ti814x.c
index cb4210f..8b2878d 100644
--- a/arch/arm/cpu/armv7/am33xx/clock_ti814x.c
+++ b/arch/arm/cpu/armv7/am33xx/clock_ti814x.c
@@ -109,6 +109,8 @@ struct ad_pll {
#define OSC_SRC_CTRL (PLL_SUBSYS_BASE + 0x2C0)
/* PRCM */
+#define ENET_CLKCTRL_CMPL 0x30000
+
#define CM_DEFAULT_BASE (PRCM_BASE + 0x0500)
struct cm_def {
@@ -183,7 +185,7 @@ struct cm_alwon {
unsigned int resv5[2];
unsigned int gpmcclkctrl;
unsigned int ethernet0clkctrl;
- unsigned int resv6[1];
+ unsigned int ethernet1clkctrl;
unsigned int mpuclkctrl;
unsigned int debugssclkctrl;
unsigned int l3clkctrl;
@@ -203,9 +205,67 @@ struct cm_alwon {
unsigned int custefuseclkctrl;
};
+#define SATA_PLL_BASE (CTRL_BASE + 0x0720)
+
+struct sata_pll {
+ unsigned int pllcfg0;
+ unsigned int pllcfg1;
+ unsigned int pllcfg2;
+ unsigned int pllcfg3;
+ unsigned int pllcfg4;
+ unsigned int pllstatus;
+ unsigned int rxstatus;
+ unsigned int txstatus;
+ unsigned int testcfg;
+};
+
+#define SEL_IN_FREQ (0x1 << 31)
+#define DIGCLRZ (0x1 << 30)
+#define ENDIGLDO (0x1 << 4)
+#define APLL_CP_CURR (0x1 << 3)
+#define ENBGSC_REF (0x1 << 2)
+#define ENPLLLDO (0x1 << 1)
+#define ENPLL (0x1 << 0)
+
+#define SATA_PLLCFG0_1 (SEL_IN_FREQ | ENBGSC_REF)
+#define SATA_PLLCFG0_2 (SEL_IN_FREQ | ENDIGLDO | ENBGSC_REF)
+#define SATA_PLLCFG0_3 (SEL_IN_FREQ | ENDIGLDO | ENBGSC_REF | ENPLLLDO)
+#define SATA_PLLCFG0_4 (SEL_IN_FREQ | DIGCLRZ | ENDIGLDO | ENBGSC_REF | \
+ ENPLLLDO | ENPLL)
+
+#define PLL_LOCK (0x1 << 0)
+
+#define ENSATAMODE (0x1 << 31)
+#define PLLREFSEL (0x1 << 30)
+#define MDIVINT (0x4b << 18)
+#define EN_CLKAUX (0x1 << 5)
+#define EN_CLK125M (0x1 << 4)
+#define EN_CLK100M (0x1 << 3)
+#define EN_CLK50M (0x1 << 2)
+
+#define SATA_PLLCFG1 (ENSATAMODE | \
+ PLLREFSEL | \
+ MDIVINT | \
+ EN_CLKAUX | \
+ EN_CLK125M | \
+ EN_CLK100M | \
+ EN_CLK50M)
+
+#define DIGLDO_EN_CAPLESSMODE (0x1 << 22)
+#define PLLDO_EN_LDO_STABLE (0x1 << 11)
+#define PLLDO_EN_BUF_CUR (0x1 << 7)
+#define PLLDO_EN_LP (0x1 << 6)
+#define PLLDO_CTRL_TRIM_1_4V (0x10 << 1)
+
+#define SATA_PLLCFG3 (DIGLDO_EN_CAPLESSMODE | \
+ PLLDO_EN_LDO_STABLE | \
+ PLLDO_EN_BUF_CUR | \
+ PLLDO_EN_LP | \
+ PLLDO_CTRL_TRIM_1_4V)
const struct cm_alwon *cmalwon = (struct cm_alwon *)CM_ALWON_BASE;
const struct cm_def *cmdef = (struct cm_def *)CM_DEFAULT_BASE;
+const struct sata_pll *spll = (struct sata_pll *)SATA_PLL_BASE;
/*
* Enable the peripheral clock for required peripherals
@@ -221,6 +281,15 @@ static void enable_per_clocks(void)
writel(PRCM_MOD_EN, &cmalwon->mmchs1clkctrl);
while (readl(&cmalwon->mmchs1clkctrl) != PRCM_MOD_EN)
;
+
+ /* Ethernet */
+ writel(PRCM_MOD_EN, &cmalwon->ethclkstctrl);
+ writel(PRCM_MOD_EN, &cmalwon->ethernet0clkctrl);
+ while ((readl(&cmalwon->ethernet0clkctrl) & ENET_CLKCTRL_CMPL) != 0)
+ ;
+ writel(PRCM_MOD_EN, &cmalwon->ethernet1clkctrl);
+ while ((readl(&cmalwon->ethernet1clkctrl) & ENET_CLKCTRL_CMPL) != 0)
+ ;
}
/*
@@ -365,6 +434,35 @@ void ddr_pll_config(unsigned int ddrpll_m)
pll_config(DDR_PLL_BASE, DDR_N, DDR_M, DDR_M2, DDR_CLKCTRL, 1);
}
+void sata_pll_config(void)
+{
+ /*
+ * This sequence for configuring the SATA PLL
+ * resident in the control module is documented
+ * in TI8148 TRM section 21.3.1
+ */
+ writel(SATA_PLLCFG1, &spll->pllcfg1);
+ udelay(50);
+
+ writel(SATA_PLLCFG3, &spll->pllcfg3);
+ udelay(50);
+
+ writel(SATA_PLLCFG0_1, &spll->pllcfg0);
+ udelay(50);
+
+ writel(SATA_PLLCFG0_2, &spll->pllcfg0);
+ udelay(50);
+
+ writel(SATA_PLLCFG0_3, &spll->pllcfg0);
+ udelay(50);
+
+ writel(SATA_PLLCFG0_4, &spll->pllcfg0);
+ udelay(50);
+
+ while (((readl(&spll->pllstatus) & PLL_LOCK) == 0))
+ ;
+}
+
void enable_emif_clocks(void) {};
void enable_dmm_clocks(void)
@@ -397,9 +495,10 @@ void pll_init()
/* Enable the control module */
writel(PRCM_MOD_EN, &cmalwon->controlclkctrl);
+ /* Configure PLLs */
mpu_pll_config();
-
l3_pll_config();
+ sata_pll_config();
/* Enable the required peripherals */
enable_per_clocks();