[U-Boot] [PATCH 13/18] arm: mx6: cm_fx6: add nand support

[Nikita Kiryanov]

Add NAND support for Compulab CM-FX6 CoM.

Cc: Igor Grinberg <grinberg at compulab.co.il>
Cc: Stefano Babic <sbabic at denx.de>
Cc: Tom Rini <trini at ti.com>
Signed-off-by: Nikita Kiryanov <nikita at compulab.co.il>
---
 board/compulab/cm_fx6/cm_fx6.c | 38 ++++++++++++++++++++++++++++++++++++++
 board/compulab/cm_fx6/spl.c    |  9 +++++++++
 include/configs/cm_fx6.h       | 14 ++++++++++++++
 3 files changed, 61 insertions(+)

diff --git a/board/compulab/cm_fx6/cm_fx6.c b/board/compulab/cm_fx6/cm_fx6.c
index b55b99e..6d37c21 100644
--- a/board/compulab/cm_fx6/cm_fx6.c
+++ b/board/compulab/cm_fx6/cm_fx6.c
@@ -9,10 +9,46 @@
  */
 
 #include <common.h>
+#include <asm/arch/crm_regs.h>
+#include <asm/arch/sys_proto.h>
+#include <asm/io.h>
 #include "common.h"
 
 DECLARE_GLOBAL_DATA_PTR;
 
+#ifdef CONFIG_NAND_MXS
+static iomux_v3_cfg_t const nand_pads[] = {
+	IOMUX_PADS(PAD_NANDF_CLE__NAND_CLE     | MUX_PAD_CTRL(NO_PAD_CTRL)),
+	IOMUX_PADS(PAD_NANDF_ALE__NAND_ALE     | MUX_PAD_CTRL(NO_PAD_CTRL)),
+	IOMUX_PADS(PAD_NANDF_CS0__NAND_CE0_B   | MUX_PAD_CTRL(NO_PAD_CTRL)),
+	IOMUX_PADS(PAD_NANDF_RB0__NAND_READY_B | MUX_PAD_CTRL(NO_PAD_CTRL)),
+	IOMUX_PADS(PAD_NANDF_D0__NAND_DATA00   | MUX_PAD_CTRL(NO_PAD_CTRL)),
+	IOMUX_PADS(PAD_NANDF_D1__NAND_DATA01   | MUX_PAD_CTRL(NO_PAD_CTRL)),
+	IOMUX_PADS(PAD_NANDF_D2__NAND_DATA02   | MUX_PAD_CTRL(NO_PAD_CTRL)),
+	IOMUX_PADS(PAD_NANDF_D3__NAND_DATA03   | MUX_PAD_CTRL(NO_PAD_CTRL)),
+	IOMUX_PADS(PAD_NANDF_D4__NAND_DATA04   | MUX_PAD_CTRL(NO_PAD_CTRL)),
+	IOMUX_PADS(PAD_NANDF_D5__NAND_DATA05   | MUX_PAD_CTRL(NO_PAD_CTRL)),
+	IOMUX_PADS(PAD_NANDF_D6__NAND_DATA06   | MUX_PAD_CTRL(NO_PAD_CTRL)),
+	IOMUX_PADS(PAD_NANDF_D7__NAND_DATA07   | MUX_PAD_CTRL(NO_PAD_CTRL)),
+	IOMUX_PADS(PAD_SD4_CMD__NAND_RE_B      | MUX_PAD_CTRL(NO_PAD_CTRL)),
+	IOMUX_PADS(PAD_SD4_CLK__NAND_WE_B      | MUX_PAD_CTRL(NO_PAD_CTRL)),
+};
+
+static void cm_fx6_setup_gpmi_nand(void)
+{
+	SETUP_IOMUX_PADS(nand_pads);
+	/* Enable clock roots */
+	enable_usdhc_clk(1, 3);
+	enable_usdhc_clk(1, 4);
+
+	setup_gpmi_io_clk(MXC_CCM_CS2CDR_ENFC_CLK_PODF(0xf) |
+			  MXC_CCM_CS2CDR_ENFC_CLK_PRED(1)   |
+			  MXC_CCM_CS2CDR_ENFC_CLK_SEL(0));
+}
+#else
+static void cm_fx6_setup_gpmi_nand(void) {}
+#endif
+
 #ifdef CONFIG_FSL_ESDHC
 int board_mmc_init(bd_t *bis)
 {
@@ -33,6 +69,8 @@ int board_mmc_init(bd_t *bis)
 int board_init(void)
 {
 	gd->bd->bi_boot_params = PHYS_SDRAM_1 + 0x100;
+	cm_fx6_setup_gpmi_nand();
+
 	return 0;
 }
 
diff --git a/board/compulab/cm_fx6/spl.c b/board/compulab/cm_fx6/spl.c
index 9f9e5f8..5c432b4 100644
--- a/board/compulab/cm_fx6/spl.c
+++ b/board/compulab/cm_fx6/spl.c
@@ -15,6 +15,7 @@
 #include <asm/arch/mx6-ddr.h>
 #include <asm/arch/clock.h>
 #include <asm/arch/sys_proto.h>
+#include <asm/arch/crm_regs.h>
 #include <asm/imx-common/iomux-v3.h>
 #include <fsl_esdhc.h>
 #include "common.h"
@@ -355,7 +356,15 @@ static void cm_fx6_setup_ecspi(void) { }
 
 void board_init_f(ulong dummy)
 {
+	struct mxc_ccm_reg *mxc_ccm = (struct mxc_ccm_reg *)CCM_BASE_ADDR;
+
 	gd = &gdata;
+	/*
+	 * We don't use DMA in SPL, but we do need it in U-Boot. U-Boot
+	 * initializes DMA very early (before all board code), so the only
+	 * opportunity we have to initialize APBHDMA clocks is in SPL.
+	 */
+	setbits_le32(&mxc_ccm->CCGR0, MXC_CCM_CCGR0_APBHDMA_MASK);
 	enable_usdhc_clk(1, 2);
 	arch_cpu_init();
 	timer_init();
diff --git a/include/configs/cm_fx6.h b/include/configs/cm_fx6.h
index 285af33..973150f 100644
--- a/include/configs/cm_fx6.h
+++ b/include/configs/cm_fx6.h
@@ -179,6 +179,20 @@
 #define CONFIG_SPI_FLASH_SST
 #define CONFIG_SPI_FLASH_WINBOND
 
+/* NAND */
+#ifndef CONFIG_SPL_BUILD
+#define CONFIG_CMD_NAND
+#define CONFIG_SYS_NAND_BASE		0x40000000
+#define CONFIG_SYS_NAND_MAX_CHIPS	1
+#define CONFIG_SYS_MAX_NAND_DEVICE	1
+#define CONFIG_NAND_MXS
+#define CONFIG_SYS_NAND_ONFI_DETECTION
+/* APBH DMA is required for NAND support */
+#define CONFIG_APBH_DMA
+#define CONFIG_APBH_DMA_BURST
+#define CONFIG_APBH_DMA_BURST8
+#endif
+
 /* GPIO */
 #define CONFIG_MXC_GPIO
 
-- 
1.9.1