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

Nikita Kiryanov
2014-08-03T07:34:43Z

Add NAND support for Compulab CM-FX6 CoM.

Cc: Igor Grinberg <grinberg@compulab.co.il>
Cc: Stefano Babic <sbabic@denx.de>
Cc: Tom Rini <trini@ti.com>
Signed-off-by: Nikita Kiryanov <nikita@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