keystone2: enable OSR clock domain for K2L SoC

This patches enables the On-chip Shared Ram clock domain for K2L SoC.

Signed-off-by: Hao Zhang <hzhang@ti.com>
Signed-off-by: Ivan Khoronzhuk <ivan.khoronzhuk@ti.com>

arch/arm/cpu/armv7/keystone/init.c

@@ -13,6 +13,7 @@
 #include <asm/arch/msmc.h>
 #include <asm/arch/clock.h>
 #include <asm/arch/hardware.h>
+#include <asm/arch/psc_defs.h>
 
 void chip_configuration_unlock(void)
 {
@@ -20,6 +21,53 @@ void chip_configuration_unlock(void)
 	__raw_writel(KS2_KICK1_MAGIC, KS2_KICK1);
 }
 
+#ifdef CONFIG_SOC_K2L
+void osr_init(void)
+{
+	u32 i;
+	u32 j;
+	u32 val;
+	u32 base = KS2_OSR_CFG_BASE;
+	u32 ecc_ctrl[KS2_OSR_NUM_RAM_BANKS];
+
+	/* Enable the OSR clock domain */
+	psc_enable_module(KS2_LPSC_OSR);
+
+	/* Disable OSR ECC check for all the ram banks */
+	for (i = 0; i < KS2_OSR_NUM_RAM_BANKS; i++) {
+		val = i | KS2_OSR_ECC_VEC_TRIG_RD |
+			(KS2_OSR_ECC_CTRL << KS2_OSR_ECC_VEC_RD_ADDR_SH);
+
+		writel(val , base + KS2_OSR_ECC_VEC);
+
+		/**
+		 * wait till read is done.
+		 * Print should be added after earlyprintk support is added.
+		 */
+		for (j = 0; j < 10000; j++) {
+			val = readl(base + KS2_OSR_ECC_VEC);
+			if (val & KS2_OSR_ECC_VEC_RD_DONE)
+				break;
+		}
+
+		ecc_ctrl[i] = readl(base + KS2_OSR_ECC_CTRL) ^
+						KS2_OSR_ECC_CTRL_CHK;
+
+		writel(ecc_ctrl[i], KS2_MSMC_DATA_BASE + i * 4);
+		writel(ecc_ctrl[i], base + KS2_OSR_ECC_CTRL);
+	}
+
+	/* Reset OSR memory to all zeros */
+	for (i = 0; i < KS2_OSR_SIZE; i += 4)
+		writel(0, KS2_OSR_DATA_BASE + i);
+
+	/* Enable OSR ECC check for all the ram banks */
+	for (i = 0; i < KS2_OSR_NUM_RAM_BANKS; i++)
+		writel(ecc_ctrl[i] |
+		       KS2_OSR_ECC_CTRL_CHK, base + KS2_OSR_ECC_CTRL);
+}
+#endif
+
 int arch_cpu_init(void)
 {
 	chip_configuration_unlock();
@@ -32,6 +80,9 @@ int arch_cpu_init(void)
 #if defined(CONFIG_SOC_K2E) || defined(CONFIG_SOC_K2L)
 	msmc_share_all_segments(KS2_MSMC_SEGMENT_PCIE1);
 #endif
+#ifdef CONFIG_SOC_K2L
+	osr_init();
+#endif
 
 	/*
 	 * just initialise the COM2 port so that TI specific

arch/arm/include/asm/arch-keystone/hardware-k2l.h

@@ -60,6 +60,30 @@
 #define KS2_CIC2_DDR3_ECC_IRQ_NUM	0x0D3
 #define KS2_CIC2_DDR3_ECC_CHAN_NUM	0x01D
 
+/* OSR */
+#define KS2_OSR_DATA_BASE		0x70000000	/* OSR data base */
+#define KS2_OSR_CFG_BASE		0x02348c00	/* OSR config base */
+#define KS2_OSR_ECC_VEC			0x08		/* ECC Vector reg */
+#define KS2_OSR_ECC_CTRL		0x14		/* ECC control reg */
+
+/* OSR ECC Vector register */
+#define KS2_OSR_ECC_VEC_TRIG_RD		BIT(15)		/* trigger a read op */
+#define KS2_OSR_ECC_VEC_RD_DONE		BIT(24)		/* read complete */
+
+#define KS2_OSR_ECC_VEC_RAM_ID_SH	0		/* RAM ID shift */
+#define KS2_OSR_ECC_VEC_RD_ADDR_SH	16		/* read address shift */
+
+/* OSR ECC control register */
+#define KS2_OSR_ECC_CTRL_EN		BIT(0)		/* ECC enable bit */
+#define KS2_OSR_ECC_CTRL_CHK		BIT(1)		/* ECC check bit */
+#define KS2_OSR_ECC_CTRL_RMW		BIT(2)		/* ECC check bit */
+
+/* Number of OSR RAM banks */
+#define KS2_OSR_NUM_RAM_BANKS		4
+
+/* OSR memory size */
+#define KS2_OSR_SIZE			0x100000
+
 /* Number of DSP cores */
 #define KS2_NUM_DSPS			4
 

arch/arm/include/asm/arch-keystone/hardware.h

@@ -142,6 +142,7 @@ typedef volatile unsigned int   *dv_reg_p;
 
 /* MSMC control */
 #define KS2_MSMC_CTRL_BASE		0x0bc00000
+#define KS2_MSMC_DATA_BASE		0x0c000000
 #define KS2_MSMC_SEGMENT_TETRIS		8
 #define KS2_MSMC_SEGMENT_NETCP		9
 #define KS2_MSMC_SEGMENT_QM_PDSP	10