imx:mx6ul add dram spl configuration and header file

1. Define two structures mx6ul_iomux_ddr_regs and mx6ul_iomux_grp_regs.
2. Add a new function mx6ul_dram_iocfg to configure dram io.
3. Refactor MMDC1 macro, discard "#ifdef CONFIG_MX6SX". Since
   only mmdc0 channel exists on i.MX6SX/UL, redefine MMDC1 macro support
   runtime check, but not hardcoding #ifdef macros.
4. Introduce mx6ul-ddr.h, which includes the register address for DRAM
   IO configuration.

Signed-off-by: Peng Fan <Peng.Fan@freescale.com>

arch/arm/cpu/armv7/mx6/ddr.c

@@ -71,6 +71,50 @@ void mx6sx_dram_iocfg(unsigned width,
 }
 #endif
 
+#ifdef CONFIG_MX6UL
+void mx6ul_dram_iocfg(unsigned width,
+		      const struct mx6ul_iomux_ddr_regs *ddr,
+		      const struct mx6ul_iomux_grp_regs *grp)
+{
+	struct mx6ul_iomux_ddr_regs *mx6_ddr_iomux;
+	struct mx6ul_iomux_grp_regs *mx6_grp_iomux;
+
+	mx6_ddr_iomux = (struct mx6ul_iomux_ddr_regs *)MX6UL_IOM_DDR_BASE;
+	mx6_grp_iomux = (struct mx6ul_iomux_grp_regs *)MX6UL_IOM_GRP_BASE;
+
+	/* DDR IO TYPE */
+	writel(grp->grp_ddr_type, &mx6_grp_iomux->grp_ddr_type);
+	writel(grp->grp_ddrpke, &mx6_grp_iomux->grp_ddrpke);
+
+	/* CLOCK */
+	writel(ddr->dram_sdclk_0, &mx6_ddr_iomux->dram_sdclk_0);
+
+	/* ADDRESS */
+	writel(ddr->dram_cas, &mx6_ddr_iomux->dram_cas);
+	writel(ddr->dram_ras, &mx6_ddr_iomux->dram_ras);
+	writel(grp->grp_addds, &mx6_grp_iomux->grp_addds);
+
+	/* Control */
+	writel(ddr->dram_reset, &mx6_ddr_iomux->dram_reset);
+	writel(ddr->dram_sdba2, &mx6_ddr_iomux->dram_sdba2);
+	writel(ddr->dram_odt0, &mx6_ddr_iomux->dram_odt0);
+	writel(ddr->dram_odt1, &mx6_ddr_iomux->dram_odt1);
+	writel(grp->grp_ctlds, &mx6_grp_iomux->grp_ctlds);
+
+	/* Data Strobes */
+	writel(grp->grp_ddrmode_ctl, &mx6_grp_iomux->grp_ddrmode_ctl);
+	writel(ddr->dram_sdqs0, &mx6_ddr_iomux->dram_sdqs0);
+	writel(ddr->dram_sdqs1, &mx6_ddr_iomux->dram_sdqs1);
+
+	/* Data */
+	writel(grp->grp_ddrmode, &mx6_grp_iomux->grp_ddrmode);
+	writel(grp->grp_b0ds, &mx6_grp_iomux->grp_b0ds);
+	writel(grp->grp_b1ds, &mx6_grp_iomux->grp_b1ds);
+	writel(ddr->dram_dqm0, &mx6_ddr_iomux->dram_dqm0);
+	writel(ddr->dram_dqm1, &mx6_ddr_iomux->dram_dqm1);
+}
+#endif
+
 #if defined(CONFIG_MX6QDL) || defined(CONFIG_MX6Q) || defined(CONFIG_MX6D)
 /* Configure MX6DQ mmdc iomux */
 void mx6dq_dram_iocfg(unsigned width,
@@ -243,19 +287,17 @@ void mx6sdl_dram_iocfg(unsigned width,
  */
 #define MR(val, ba, cmd, cs1) \
 	((val << 16) | (1 << 15) | (cmd << 4) | (cs1 << 3) | ba)
-#ifdef CONFIG_MX6SX
-#define MMDC1(entry, value)	do {} while (0)
-#else
-#define MMDC1(entry, value) do { mmdc1->entry = value; } while (0)
-#endif
+#define MMDC1(entry, value) do {					  \
+	if (!is_cpu_type(MXC_CPU_MX6SX) && !is_cpu_type(MXC_CPU_MX6UL))	  \
+		mmdc1->entry = value;					  \
+	} while (0)
+
 void mx6_dram_cfg(const struct mx6_ddr_sysinfo *sysinfo,
 		  const struct mx6_mmdc_calibration *calib,
 		  const struct mx6_ddr3_cfg *ddr3_cfg)
 {
 	volatile struct mmdc_p_regs *mmdc0;
-#ifndef CONFIG_MX6SX
 	volatile struct mmdc_p_regs *mmdc1;
-#endif
 	u32 val;
 	u8 tcke, tcksrx, tcksre, txpdll, taofpd, taonpd, trrd;
 	u8 todtlon, taxpd, tanpd, tcwl, txp, tfaw, tcl;
@@ -270,9 +312,8 @@ void mx6_dram_cfg(const struct mx6_ddr_sysinfo *sysinfo,
 	u16 mem_speed = ddr3_cfg->mem_speed;
 
 	mmdc0 = (struct mmdc_p_regs *)MMDC_P0_BASE_ADDR;
-#ifndef CONFIG_MX6SX
-	mmdc1 = (struct mmdc_p_regs *)MMDC_P1_BASE_ADDR;
-#endif
+	if (!is_cpu_type(MXC_CPU_MX6SX) && !is_cpu_type(MXC_CPU_MX6UL))
+		mmdc1 = (struct mmdc_p_regs *)MMDC_P1_BASE_ADDR;
 
 	/* Limit mem_speed for MX6D/MX6Q */
 	if (is_cpu_type(MXC_CPU_MX6Q) || is_cpu_type(MXC_CPU_MX6D)) {

arch/arm/include/asm/arch-mx6/mx6-ddr.h

@@ -16,7 +16,11 @@
 #ifdef CONFIG_MX6SX
 #include "mx6sx-ddr.h"
 #else
+#ifdef CONFIG_MX6UL
+#include "mx6ul-ddr.h"
+#else
 #error "Please select cpu"
+#endif	/* CONFIG_MX6UL */
 #endif	/* CONFIG_MX6SX */
 #endif	/* CONFIG_MX6DL or CONFIG_MX6S */
 #endif	/* CONFIG_MX6Q */
@@ -62,6 +66,44 @@ struct mmdc_p_regs {
 	u32 mpmur0;
 };
 
+#define MX6UL_IOM_DDR_BASE	0x020e0200
+struct mx6ul_iomux_ddr_regs {
+	u32 res1[17];
+	u32 dram_dqm0;
+	u32 dram_dqm1;
+	u32 dram_ras;
+	u32 dram_cas;
+	u32 dram_cs0;
+	u32 dram_cs1;
+	u32 dram_sdwe_b;
+	u32 dram_odt0;
+	u32 dram_odt1;
+	u32 dram_sdba0;
+	u32 dram_sdba1;
+	u32 dram_sdba2;
+	u32 dram_sdcke0;
+	u32 dram_sdcke1;
+	u32 dram_sdclk_0;
+	u32 dram_sdqs0;
+	u32 dram_sdqs1;
+	u32 dram_reset;
+};
+
+#define MX6UL_IOM_GRP_BASE	0x020e0400
+struct mx6ul_iomux_grp_regs {
+	u32 res1[36];
+	u32 grp_addds;
+	u32 grp_ddrmode_ctl;
+	u32 grp_b0ds;
+	u32 grp_ddrpk;
+	u32 grp_ctlds;
+	u32 grp_b1ds;
+	u32 grp_ddrhys;
+	u32 grp_ddrpke;
+	u32 grp_ddrmode;
+	u32 grp_ddr_type;
+};
+
 #define MX6SX_IOM_DDR_BASE	0x020e0200
 struct mx6sx_iomux_ddr_regs {
 	u32 res1[59];
@@ -290,6 +332,9 @@ void mx6sdl_dram_iocfg(unsigned width,
 void mx6sx_dram_iocfg(unsigned width,
 		      const struct mx6sx_iomux_ddr_regs *,
 		      const struct mx6sx_iomux_grp_regs *);
+void mx6ul_dram_iocfg(unsigned width,
+		      const struct mx6ul_iomux_ddr_regs *,
+		      const struct mx6ul_iomux_grp_regs *);
 
 /* configure mx6 mmdc registers */
 void mx6_dram_cfg(const struct mx6_ddr_sysinfo *,

arch/arm/include/asm/arch-mx6/mx6ul-ddr.h

@@ -0,0 +1,45 @@
+/*
+ * Copyright (C) 2015 Freescale Semiconductor, Inc.
+ *
+ * SPDX-License-Identifier:	GPL-2.0+
+ */
+
+#ifndef __ASM_ARCH_MX6UL_DDR_H__
+#define __ASM_ARCH_MX6UL_DDR_H__
+
+#ifndef CONFIG_MX6UL
+#error "wrong CPU"
+#endif
+
+#define MX6_IOM_DRAM_DQM0	0x020e0244
+#define MX6_IOM_DRAM_DQM1	0x020e0248
+
+#define MX6_IOM_DRAM_RAS	0x020e024c
+#define MX6_IOM_DRAM_CAS	0x020e0250
+#define MX6_IOM_DRAM_CS0	0x020e0254
+#define MX6_IOM_DRAM_CS1	0x020e0258
+#define MX6_IOM_DRAM_SDWE_B	0x020e025c
+#define MX6_IOM_DRAM_SDODT0	0x020e0260
+#define MX6_IOM_DRAM_SDODT1	0x020e0264
+#define MX6_IOM_DRAM_SDBA0	0x020e0268
+#define MX6_IOM_DRAM_SDBA1	0x020e026c
+#define MX6_IOM_DRAM_SDBA2	0x020e0270
+#define MX6_IOM_DRAM_SDCKE0	0x020e0274
+#define MX6_IOM_DRAM_SDCKE1	0x020e0278
+#define MX6_IOM_DRAM_SDCLK_0	0x020e027c
+#define MX6_IOM_DRAM_SDQS0	0x020e0280
+#define MX6_IOM_DRAM_SDQS1	0x020e0284
+#define MX6_IOM_DRAM_RESET	0x020e0288
+
+#define MX6_IOM_GRP_ADDDS	0x020e0490
+#define MX6_IOM_DDRMODE_CTL	0x020e0494
+#define MX6_IOM_GRP_B0DS	0x020e0498
+#define MX6_IOM_GRP_DDRPK	0x020e049c
+#define MX6_IOM_GRP_CTLDS	0x020e04a0
+#define MX6_IOM_GRP_B1DS	0x020e04a4
+#define MX6_IOM_GRP_DDRHYS	0x020e04a8
+#define MX6_IOM_GRP_DDRPKE	0x020e04ac
+#define MX6_IOM_GRP_DDRMODE	0x020e04b0
+#define MX6_IOM_GRP_DDR_TYPE	0x020e04b4
+
+#endif	/*__ASM_ARCH_MX6SX_DDR_H__ */