ARM: OMAP4+: Cleanup emif specific files

Removing the duplicated code in ddr3 initialization.
Also creating structure for lpddr2 mode registers to
avoid unnessecary revision checks.

These change reduces code addition for future Socs.

Signed-off-by: R Sricharan <r.sricharan@ti.com>
Signed-off-by: Lokesh Vutla <lokeshvutla@ti.com>
Reviewed-by: Tom Rini <trini@ti.com>

4 files changed, 108 insertions, 85 deletions

diff --git a/arch/arm/cpu/armv7/omap-common/emif-common.c b/arch/arm/cpu/armv7/omap-common/emif-common.c
index bb37cf314a..0683b9f74d 100644
--- a/arch/arm/cpu/armv7/omap-common/emif-common.c
+++ b/arch/arm/cpu/armv7/omap-common/emif-common.c
@@ -123,11 +123,13 @@ void emif_reset_phy(u32 base)
 static void do_lpddr2_init(u32 base, u32 cs)
 {
 	u32 mr_addr;
+	const struct lpddr2_mr_regs *mr_regs;
 
+	get_lpddr2_mr_regs(&mr_regs);
 	/* Wait till device auto initialization is complete */
 	while (get_mr(base, cs, LPDDR2_MR0) & LPDDR2_MR0_DAI_MASK)
 		;
-	set_mr(base, cs, LPDDR2_MR10, MR10_ZQ_ZQINIT);
+	set_mr(base, cs, LPDDR2_MR10, mr_regs->mr10);
 	/*
 	 * tZQINIT = 1 us
 	 * Enough loops assuming a maximum of 2GHz
@@ -135,22 +137,18 @@ static void do_lpddr2_init(u32 base, u32 cs)
 
 	sdelay(2000);
 
-	if (omap_revision() >= OMAP5430_ES1_0)
-		set_mr(base, cs, LPDDR2_MR1, MR1_BL_8_BT_SEQ_WRAP_EN_NWR_8);
-	else
-		set_mr(base, cs, LPDDR2_MR1, MR1_BL_8_BT_SEQ_WRAP_EN_NWR_3);
-
-	set_mr(base, cs, LPDDR2_MR16, MR16_REF_FULL_ARRAY);
+	set_mr(base, cs, LPDDR2_MR1, mr_regs->mr1);
+	set_mr(base, cs, LPDDR2_MR16, mr_regs->mr16);
 
 	/*
 	 * Enable refresh along with writing MR2
 	 * Encoding of RL in MR2 is (RL - 2)
 	 */
 	mr_addr = LPDDR2_MR2 | EMIF_REG_REFRESH_EN_MASK;
-	set_mr(base, cs, mr_addr, RL_FINAL - 2);
+	set_mr(base, cs, mr_addr, mr_regs->mr2);
 
-	if (omap_revision() >= OMAP5430_ES1_0)
-		set_mr(base, cs, LPDDR2_MR3, 0x1);
+	if (mr_regs->mr3 > 0)
+		set_mr(base, cs, LPDDR2_MR3, mr_regs->mr3);
 }
 
 static void lpddr2_init(u32 base, const struct emif_regs *regs)
@@ -268,9 +266,6 @@ static void ddr3_leveling(u32 base, const struct emif_regs *regs)
 static void ddr3_init(u32 base, const struct emif_regs *regs)
 {
 	struct emif_reg_struct *emif = (struct emif_reg_struct *)base;
-	u32 *ext_phy_ctrl_base = 0;
-	u32 *emif_ext_phy_ctrl_base = 0;
-	u32 i = 0;
 
 	/*
 	 * Set SDRAM_CONFIG and PHY control registers to locked frequency
@@ -290,27 +285,7 @@ static void ddr3_init(u32 base, const struct emif_regs *regs)
 	writel(regs->ref_ctrl, &emif->emif_sdram_ref_ctrl);
 	writel(regs->read_idle_ctrl, &emif->emif_read_idlectrl);
 
-	ext_phy_ctrl_base = (u32 *) &(regs->emif_ddr_ext_phy_ctrl_1);
-	emif_ext_phy_ctrl_base = (u32 *) &(emif->emif_ddr_ext_phy_ctrl_1);
-
-	/* Configure external phy control timing registers */
-	for (i = 0; i < EMIF_EXT_PHY_CTRL_TIMING_REG; i++) {
-		writel(*ext_phy_ctrl_base, emif_ext_phy_ctrl_base++);
-		/* Update shadow registers */
-		writel(*ext_phy_ctrl_base++, emif_ext_phy_ctrl_base++);
-	}
-
-	/*
-	 * external phy 6-24 registers do not change with
-	 * ddr frequency
-	 */
-	for (i = 0; i < EMIF_EXT_PHY_CTRL_CONST_REG; i++) {
-		writel(ddr3_ext_phy_ctrl_const_base[i],
-					emif_ext_phy_ctrl_base++);
-		/* Update shadow registers */
-		writel(ddr3_ext_phy_ctrl_const_base[i],
-					emif_ext_phy_ctrl_base++);
-	}
+	do_ext_phy_settings(base, regs);
 
 	/* enable leveling */
 	writel(regs->emif_rd_wr_lvl_rmp_ctl, &emif->emif_rd_wr_lvl_rmp_ctl);
@@ -1109,9 +1084,6 @@ void emif_post_init_config(u32 base)
 	struct emif_reg_struct *emif = (struct emif_reg_struct *)base;
 	u32 omap_rev = omap_revision();
 
-	if (omap_rev == OMAP5430_ES1_0)
-		return;
-
 	/* reset phy on ES2.0 */
 	if (omap_rev == OMAP4430_ES2_0)
 		emif_reset_phy(base);
diff --git a/arch/arm/cpu/armv7/omap4/sdram_elpida.c b/arch/arm/cpu/armv7/omap4/sdram_elpida.c
index b9128faa56..01da790e3b 100644
--- a/arch/arm/cpu/armv7/omap4/sdram_elpida.c
+++ b/arch/arm/cpu/armv7/omap4/sdram_elpida.c
@@ -90,9 +90,6 @@ const struct emif_regs emif_regs_elpida_400_mhz_2cs = {
 	.emif_ddr_phy_ctlr_1		= 0x049ff418
 };
 
-/* Dummy registers for OMAP44xx */
-const u32 ddr3_ext_phy_ctrl_const_base[EMIF_EXT_PHY_CTRL_CONST_REG];
-
 const struct dmm_lisa_map_regs lisa_map_2G_x_1_x_2 = {
 	.dmm_lisa_map_0 = 0xFF020100,
 	.dmm_lisa_map_1 = 0,
@@ -284,3 +281,16 @@ void emif_get_device_timings(u32 emif_nr,
 	__attribute__((weak, alias("emif_get_device_timings_sdp")));
 
 #endif /* CONFIG_SYS_DEFAULT_LPDDR2_TIMINGS */
+
+const struct lpddr2_mr_regs mr_regs = {
+	.mr1	= MR1_BL_8_BT_SEQ_WRAP_EN_NWR_3,
+	.mr2	= 0x4,
+	.mr3	= -1,
+	.mr10	= MR10_ZQ_ZQINIT,
+	.mr16	= MR16_REF_FULL_ARRAY
+};
+
+void get_lpddr2_mr_regs(const struct lpddr2_mr_regs **regs)
+{
+	*regs = &mr_regs;
+}
diff --git a/arch/arm/cpu/armv7/omap5/sdram.c b/arch/arm/cpu/armv7/omap5/sdram.c
index 6ebdf5fbfd..687800facc 100644
--- a/arch/arm/cpu/armv7/omap5/sdram.c
+++ b/arch/arm/cpu/armv7/omap5/sdram.c
@@ -116,6 +116,56 @@ const struct dmm_lisa_map_regs lisa_map_4G_x_2_x_2 = {
 	.dmm_lisa_map_3 = 0xFF020100
 };
 
+static void emif_get_reg_dump_sdp(u32 emif_nr, const struct emif_regs **regs)
+{
+	switch (omap_revision()) {
+	case OMAP5430_ES1_0:
+		*regs = &emif_regs_532_mhz_2cs;
+		break;
+	case OMAP5432_ES1_0:
+		*regs = &emif_regs_ddr3_532_mhz_1cs;
+		break;
+	default:
+		*regs = &emif_regs_ddr3_532_mhz_1cs;
+	}
+}
+
+void emif_get_reg_dump(u32 emif_nr, const struct emif_regs **regs)
+	__attribute__((weak, alias("emif_get_reg_dump_sdp")));
+
+static void emif_get_dmm_regs_sdp(const struct dmm_lisa_map_regs
+						**dmm_lisa_regs)
+{
+	*dmm_lisa_regs = &lisa_map_4G_x_2_x_2;
+}
+
+void emif_get_dmm_regs(const struct dmm_lisa_map_regs **dmm_lisa_regs)
+	__attribute__((weak, alias("emif_get_dmm_regs_sdp")));
+#else
+
+static const struct lpddr2_device_details dev_4G_S4_details = {
+	.type		= LPDDR2_TYPE_S4,
+	.density	= LPDDR2_DENSITY_4Gb,
+	.io_width	= LPDDR2_IO_WIDTH_32,
+	.manufacturer	= LPDDR2_MANUFACTURER_SAMSUNG
+};
+
+static void emif_get_device_details_sdp(u32 emif_nr,
+		struct lpddr2_device_details *cs0_device_details,
+		struct lpddr2_device_details *cs1_device_details)
+{
+	/* EMIF1 & EMIF2 have identical configuration */
+	*cs0_device_details = dev_4G_S4_details;
+	*cs1_device_details = dev_4G_S4_details;
+}
+
+void emif_get_device_details(u32 emif_nr,
+		struct lpddr2_device_details *cs0_device_details,
+		struct lpddr2_device_details *cs1_device_details)
+	__attribute__((weak, alias("emif_get_device_details_sdp")));
+
+#endif /* CONFIG_SYS_EMIF_PRECALCULATED_TIMING_REGS */
+
 const u32 ext_phy_ctrl_const_base[EMIF_EXT_PHY_CTRL_CONST_REG] = {
 	0x01004010,
 	0x00001004,
@@ -138,7 +188,7 @@ const u32 ext_phy_ctrl_const_base[EMIF_EXT_PHY_CTRL_CONST_REG] = {
 	0x00000077
 };
 
-const u32 ddr3_ext_phy_ctrl_const_base[EMIF_EXT_PHY_CTRL_CONST_REG] = {
+const u32 ddr3_ext_phy_ctrl_const_base_es1[EMIF_EXT_PHY_CTRL_CONST_REG] = {
 	0x01004010,
 	0x00001004,
 	0x04010040,
@@ -160,54 +210,38 @@ const u32 ddr3_ext_phy_ctrl_const_base[EMIF_EXT_PHY_CTRL_CONST_REG] = {
 	0x00000057
 };
 
-static void emif_get_reg_dump_sdp(u32 emif_nr, const struct emif_regs **regs)
-{
-	if (omap_revision() == OMAP5432_ES1_0)
-		*regs = &emif_regs_ddr3_532_mhz_1cs;
-	else
-		*regs = &emif_regs_532_mhz_2cs;
-}
-void emif_get_reg_dump(u32 emif_nr, const struct emif_regs **regs)
-	__attribute__((weak, alias("emif_get_reg_dump_sdp")));
+const struct lpddr2_mr_regs mr_regs = {
+	.mr1	= MR1_BL_8_BT_SEQ_WRAP_EN_NWR_8,
+	.mr2	= 0x6,
+	.mr3	= 0x1,
+	.mr10	= MR10_ZQ_ZQINIT,
+	.mr16	= MR16_REF_FULL_ARRAY
+};
 
-static void emif_get_dmm_regs_sdp(const struct dmm_lisa_map_regs
-						**dmm_lisa_regs)
+static void emif_get_ext_phy_ctrl_const_regs(const u32 **regs)
 {
-	*dmm_lisa_regs = &lisa_map_4G_x_2_x_2;
+	switch (omap_revision()) {
+	case OMAP5430_ES1_0:
+		*regs = ext_phy_ctrl_const_base;
+		break;
+	case OMAP5432_ES1_0:
+		*regs = ddr3_ext_phy_ctrl_const_base_es1;
+		break;
+	default:
+		*regs = ddr3_ext_phy_ctrl_const_base_es1;
+	}
 }
 
-void emif_get_dmm_regs(const struct dmm_lisa_map_regs **dmm_lisa_regs)
-	__attribute__((weak, alias("emif_get_dmm_regs_sdp")));
-
-#else
-
-static const struct lpddr2_device_details dev_4G_S4_details = {
-	.type		= LPDDR2_TYPE_S4,
-	.density	= LPDDR2_DENSITY_4Gb,
-	.io_width	= LPDDR2_IO_WIDTH_32,
-	.manufacturer	= LPDDR2_MANUFACTURER_SAMSUNG
-};
-
-static void emif_get_device_details_sdp(u32 emif_nr,
-		struct lpddr2_device_details *cs0_device_details,
-		struct lpddr2_device_details *cs1_device_details)
+void get_lpddr2_mr_regs(const struct lpddr2_mr_regs **regs)
 {
-	/* EMIF1 & EMIF2 have identical configuration */
-	*cs0_device_details = dev_4G_S4_details;
-	*cs1_device_details = dev_4G_S4_details;
+	*regs = &mr_regs;
 }
 
-void emif_get_device_details(u32 emif_nr,
-		struct lpddr2_device_details *cs0_device_details,
-		struct lpddr2_device_details *cs1_device_details)
-	__attribute__((weak, alias("emif_get_device_details_sdp")));
-
-#endif /* CONFIG_SYS_EMIF_PRECALCULATED_TIMING_REGS */
-
 void do_ext_phy_settings(u32 base, const struct emif_regs *regs)
 {
 	u32 *ext_phy_ctrl_base = 0;
 	u32 *emif_ext_phy_ctrl_base = 0;
+	const u32 *ext_phy_ctrl_const_regs;
 	u32 i = 0;
 
 	struct emif_reg_struct *emif = (struct emif_reg_struct *)base;
@@ -226,12 +260,13 @@ void do_ext_phy_settings(u32 base, const struct emif_regs *regs)
 	 * external phy 6-24 registers do not change with
 	 * ddr frequency
 	 */
+	emif_get_ext_phy_ctrl_const_regs(&ext_phy_ctrl_const_regs);
 	for (i = 0; i < EMIF_EXT_PHY_CTRL_CONST_REG; i++) {
-		writel(ext_phy_ctrl_const_base[i],
-					emif_ext_phy_ctrl_base++);
+		writel(ext_phy_ctrl_const_regs[i],
+		       emif_ext_phy_ctrl_base++);
 		/* Update shadow registers */
-		writel(ext_phy_ctrl_const_base[i],
-					emif_ext_phy_ctrl_base++);
+		writel(ext_phy_ctrl_const_regs[i],
+		       emif_ext_phy_ctrl_base++);
 	}
 }
 
diff --git a/arch/arm/include/asm/emif.h b/arch/arm/include/asm/emif.h
index 0824a80d06..fd530bb26a 100644
--- a/arch/arm/include/asm/emif.h
+++ b/arch/arm/include/asm/emif.h
@@ -698,9 +698,6 @@ struct dmm_lisa_map_regs {
 	u32 dmm_lisa_map_3;
 };
 
-extern const u32 ext_phy_ctrl_const_base[EMIF_EXT_PHY_CTRL_CONST_REG];
-extern const u32 ddr3_ext_phy_ctrl_const_base[EMIF_EXT_PHY_CTRL_CONST_REG];
-
 #define CS0	0
 #define CS1	1
 /* The maximum frequency at which the LPDDR2 interface can operate in Hz*/
@@ -1134,6 +1131,14 @@ struct emif_regs {
 	u32 emif_rd_wr_exec_thresh;
 };
 
+struct lpddr2_mr_regs {
+	s8 mr1;
+	s8 mr2;
+	s8 mr3;
+	s8 mr10;
+	s8 mr16;
+};
+
 /* assert macros */
 #if defined(DEBUG)
 #define emif_assert(c)	({ if (!(c)) for (;;); })
@@ -1153,6 +1158,7 @@ void emif_get_device_timings(u32 emif_nr,
 #endif
 
 void do_ext_phy_settings(u32 base, const struct emif_regs *regs);
+void get_lpddr2_mr_regs(const struct lpddr2_mr_regs **regs);
 
 #ifndef CONFIG_SYS_EMIF_PRECALCULATED_TIMING_REGS
 extern u32 *const T_num;