AM35x: Add support for EMIF4
This patch adds support for the EMIF4 interface
available in the AM35x processors.
Signed-off-by: Vaibhav Hiremath <hvaibhav@ti.com>
Signed-off-by: Sanjeev Premi <premi@ti.com>
Signed-off-by: Sandeep Paulraj <s-paulraj@ti.com>
diff --git a/arch/arm/include/asm/arch-omap3/cpu.h b/arch/arm/include/asm/arch-omap3/cpu.h
index ce16da7..c072c27 100644
--- a/arch/arm/include/asm/arch-omap3/cpu.h
+++ b/arch/arm/include/asm/arch-omap3/cpu.h
@@ -216,6 +216,30 @@
struct sdrc_cs cs[2]; /* 0x80 || 0xB0 */
};
+/* EMIF4 */
+typedef struct emif4 {
+ unsigned int sdram_sts;
+ unsigned int sdram_config;
+ unsigned int res1;
+ unsigned int sdram_refresh_ctrl;
+ unsigned int sdram_refresh_ctrl_shdw;
+ unsigned int sdram_time1;
+ unsigned int sdram_time1_shdw;
+ unsigned int sdram_time2;
+ unsigned int sdram_time2_shdw;
+ unsigned int sdram_time3;
+ unsigned int sdram_time3_shdw;
+ unsigned char res2[8];
+ unsigned int sdram_pwr_mgmt;
+ unsigned int sdram_pwr_mgmt_shdw;
+ unsigned char res3[32];
+ unsigned int sdram_iodft_tlgc;
+ unsigned char res4[128];
+ unsigned int ddr_phyctrl1;
+ unsigned int ddr_phyctrl1_shdw;
+ unsigned int ddr_phyctrl2;
+} emif4_t;
+
#endif /* __ASSEMBLY__ */
#endif /* __KERNEL_STRICT_NAMES */
diff --git a/arch/arm/include/asm/arch-omap3/emif4.h b/arch/arm/include/asm/arch-omap3/emif4.h
new file mode 100644
index 0000000..579da0c
--- /dev/null
+++ b/arch/arm/include/asm/arch-omap3/emif4.h
@@ -0,0 +1,79 @@
+/*
+ * Auther:
+ * Vaibhav Hiremath <hvaibhav@ti.com>
+ *
+ * Copyright (C) 2010
+ * Texas Instruments Incorporated - http://www.ti.com/
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of
+ * the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
+ * MA 02111-1307 USA
+ */
+
+#ifndef _EMIF_H_
+#define _EMIF_H_
+
+/*
+ * Configuration values
+ */
+#define EMIF4_TIM1_T_RP (0x3 << 25)
+#define EMIF4_TIM1_T_RCD (0x3 << 21)
+#define EMIF4_TIM1_T_WR (0x3 << 17)
+#define EMIF4_TIM1_T_RAS (0x8 << 12)
+#define EMIF4_TIM1_T_RC (0xA << 6)
+#define EMIF4_TIM1_T_RRD (0x2 << 3)
+#define EMIF4_TIM1_T_WTR (0x2)
+
+#define EMIF4_TIM2_T_XP (0x2 << 28)
+#define EMIF4_TIM2_T_ODT (0x0 << 25)
+#define EMIF4_TIM2_T_XSNR (0x1C << 16)
+#define EMIF4_TIM2_T_XSRD (0xC8 << 6)
+#define EMIF4_TIM2_T_RTP (0x1 << 3)
+#define EMIF4_TIM2_T_CKE (0x2)
+
+#define EMIF4_TIM3_T_RFC (0x25 << 4)
+#define EMIF4_TIM3_T_RAS_MAX (0x7)
+
+#define EMIF4_PWR_IDLE_MODE (0x2 << 30)
+#define EMIF4_PWR_DPD_DIS (0x0 << 10)
+#define EMIF4_PWR_DPD_EN (0x1 << 10)
+#define EMIF4_PWR_LP_MODE (0x0 << 8)
+#define EMIF4_PWR_PM_TIM (0x0)
+
+#define EMIF4_INITREF_DIS (0x0 << 31)
+#define EMIF4_REFRESH_RATE (0x50F)
+
+#define EMIF4_CFG_SDRAM_TYP (0x2 << 29)
+#define EMIF4_CFG_IBANK_POS (0x0 << 27)
+#define EMIF4_CFG_DDR_TERM (0x0 << 24)
+#define EMIF4_CFG_DDR2_DDQS (0x1 << 23)
+#define EMIF4_CFG_DDR_DIS_DLL (0x0 << 20)
+#define EMIF4_CFG_SDR_DRV (0x0 << 18)
+#define EMIF4_CFG_NARROW_MD (0x0 << 14)
+#define EMIF4_CFG_CL (0x5 << 10)
+#define EMIF4_CFG_ROWSIZE (0x0 << 7)
+#define EMIF4_CFG_IBANK (0x3 << 4)
+#define EMIF4_CFG_EBANK (0x0 << 3)
+#define EMIF4_CFG_PGSIZE (0x2)
+
+/*
+ * EMIF4 PHY Control 1 register configuration
+ */
+#define EMIF4_DDR1_EXT_STRB_EN (0x1 << 7)
+#define EMIF4_DDR1_EXT_STRB_DIS (0x0 << 7)
+#define EMIF4_DDR1_PWRDN_DIS (0x0 << 6)
+#define EMIF4_DDR1_PWRDN_EN (0x1 << 6)
+#define EMIF4_DDR1_READ_LAT (0x6 << 0)
+
+#endif /* endif _EMIF_H_ */
diff --git a/arch/arm/include/asm/arch-omap3/sys_proto.h b/arch/arm/include/asm/arch-omap3/sys_proto.h
index 4608f30..db7b42a 100644
--- a/arch/arm/include/asm/arch-omap3/sys_proto.h
+++ b/arch/arm/include/asm/arch-omap3/sys_proto.h
@@ -33,6 +33,7 @@
void memif_init(void);
void sdrc_init(void);
void do_sdrc_init(u32, u32);
+void emif4_init(void);
void gpmc_init(void);
void enable_gpmc_cs_config(const u32 *gpmc_config, struct gpmc_cs *cs, u32 base,
u32 size);