ENGR00315894-10 i.mx6:sabreauto: Add the GPMI nand support

Add the GPMI nand support to the iMX6 sabreauto:
--Enable the GPMI NAND at default.
--Enable the clocks
--Set the default environment for nand boot

Signed-off-by: Huang Shijie <b32955@freescale.com>
Signed-off-by: Jason Liu <r64343@freescale.com>
Signed-off-by: Ye.Li <B37916@freescale.com>

1 files changed, 66 insertions, 0 deletions

diff --git a/board/freescale/mx6qsabreauto/mx6qsabreauto.c b/board/freescale/mx6qsabreauto/mx6qsabreauto.c
index 5232df7..70338d2 100644
--- a/board/freescale/mx6qsabreauto/mx6qsabreauto.c
+++ b/board/freescale/mx6qsabreauto/mx6qsabreauto.c
@@ -12,6 +12,7 @@
 #include <asm/arch/imx-regs.h>
 #include <asm/arch/iomux.h>
 #include <asm/arch/mx6-pins.h>
+#include <asm/arch/crm_regs.h>
 #include <asm/errno.h>
 #include <asm/gpio.h>
 #include <asm/imx-common/iomux-v3.h>
@@ -65,6 +66,12 @@ DECLARE_GLOBAL_DATA_PTR;
 	PAD_CTL_PUS_100K_UP | PAD_CTL_SPEED_MED |		\
 	PAD_CTL_DSE_40ohm   | PAD_CTL_SRE_FAST)
 
+
+#define GPMI_PAD_CTRL0 (PAD_CTL_PKE | PAD_CTL_PUE | PAD_CTL_PUS_100K_UP)
+#define GPMI_PAD_CTRL1 (PAD_CTL_DSE_40ohm | PAD_CTL_SPEED_MED | \
+			PAD_CTL_SRE_FAST)
+#define GPMI_PAD_CTRL2 (GPMI_PAD_CTRL0 | GPMI_PAD_CTRL1)
+
 int dram_init(void)
 {
 	gd->ram_size = ((ulong)CONFIG_DDR_MB * 1024 * 1024);
@@ -455,6 +462,61 @@ static void setup_eimnor(void)
 }
 #endif
 
+#ifdef CONFIG_SYS_USE_NAND
+iomux_v3_cfg_t gpmi_pads[] = {
+	MX6_PAD_NANDF_CLE__NAND_CLE		| MUX_PAD_CTRL(GPMI_PAD_CTRL2),
+	MX6_PAD_NANDF_ALE__NAND_ALE		| MUX_PAD_CTRL(GPMI_PAD_CTRL2),
+	MX6_PAD_NANDF_WP_B__NAND_WP_B	| MUX_PAD_CTRL(GPMI_PAD_CTRL2),
+	MX6_PAD_NANDF_RB0__NAND_READY_B	| MUX_PAD_CTRL(GPMI_PAD_CTRL0),
+	MX6_PAD_NANDF_CS0__NAND_CE0_B	| MUX_PAD_CTRL(GPMI_PAD_CTRL2),
+	MX6_PAD_SD4_CMD__NAND_RE_B		| MUX_PAD_CTRL(GPMI_PAD_CTRL2),
+	MX6_PAD_SD4_CLK__NAND_WE_B		| MUX_PAD_CTRL(GPMI_PAD_CTRL2),
+	MX6_PAD_NANDF_D0__NAND_DATA00	| MUX_PAD_CTRL(GPMI_PAD_CTRL2),
+	MX6_PAD_NANDF_D1__NAND_DATA01	| MUX_PAD_CTRL(GPMI_PAD_CTRL2),
+	MX6_PAD_NANDF_D2__NAND_DATA02	| MUX_PAD_CTRL(GPMI_PAD_CTRL2),
+	MX6_PAD_NANDF_D3__NAND_DATA03	| MUX_PAD_CTRL(GPMI_PAD_CTRL2),
+	MX6_PAD_NANDF_D4__NAND_DATA04	| MUX_PAD_CTRL(GPMI_PAD_CTRL2),
+	MX6_PAD_NANDF_D5__NAND_DATA05	| MUX_PAD_CTRL(GPMI_PAD_CTRL2),
+	MX6_PAD_NANDF_D6__NAND_DATA06	| MUX_PAD_CTRL(GPMI_PAD_CTRL2),
+	MX6_PAD_NANDF_D7__NAND_DATA07	| MUX_PAD_CTRL(GPMI_PAD_CTRL2),
+	MX6_PAD_SD4_DAT0__NAND_DQS		| MUX_PAD_CTRL(GPMI_PAD_CTRL1),
+};
+
+static void setup_gpmi_nand(void)
+{
+	struct mxc_ccm_reg *mxc_ccm = (struct mxc_ccm_reg *)CCM_BASE_ADDR;
+
+	/* config gpmi nand iomux */
+	imx_iomux_v3_setup_multiple_pads(gpmi_pads, ARRAY_SIZE(gpmi_pads));
+
+	/* gate ENFC_CLK_ROOT clock first,before clk source switch */
+	clrbits_le32(&mxc_ccm->CCGR2, MXC_CCM_CCGR2_IOMUX_IPT_CLK_IO_MASK);
+
+	/* config gpmi and bch clock to 100 MHz */
+	clrsetbits_le32(&mxc_ccm->cs2cdr,
+			MXC_CCM_CS2CDR_ENFC_CLK_PODF_MASK |
+			MXC_CCM_CS2CDR_ENFC_CLK_PRED_MASK |
+			MXC_CCM_CS2CDR_ENFC_CLK_SEL_MASK,
+			MXC_CCM_CS2CDR_ENFC_CLK_PODF(0) |
+			MXC_CCM_CS2CDR_ENFC_CLK_PRED(3) |
+			MXC_CCM_CS2CDR_ENFC_CLK_SEL(3));
+
+	/* enable ENFC_CLK_ROOT clock */
+	setbits_le32(&mxc_ccm->CCGR2, MXC_CCM_CCGR2_IOMUX_IPT_CLK_IO_MASK);
+
+	/* enable gpmi and bch clock gating */
+	setbits_le32(&mxc_ccm->CCGR4,
+		     MXC_CCM_CCGR4_RAWNAND_U_BCH_INPUT_APB_MASK |
+		     MXC_CCM_CCGR4_RAWNAND_U_GPMI_BCH_INPUT_BCH_MASK |
+		     MXC_CCM_CCGR4_RAWNAND_U_GPMI_BCH_INPUT_GPMI_IO_MASK |
+		     MXC_CCM_CCGR4_RAWNAND_U_GPMI_INPUT_APB_MASK |
+		     MXC_CCM_CCGR4_PL301_MX6QPER1_BCH_OFFSET);
+
+	/* enable apbh clock gating */
+	setbits_le32(&mxc_ccm->CCGR0, MXC_CCM_CCGR0_APBHDMA_MASK);
+}
+#endif
+
 int mx6_rgmii_rework(struct phy_device *phydev)
 {
 	unsigned short val;
@@ -543,6 +605,10 @@ int board_early_init_f(void)
 #ifdef CONFIG_SYS_USE_EIMNOR
 	setup_eimnor();
 #endif
+
+#ifdef CONFIG_SYS_USE_NAND
+	setup_gpmi_nand();
+#endif
 	return 0;
 }