From 45997e0a86ee8d8abec6d791a241cb20011fe0e3 Mon Sep 17 00:00:00 2001 From: Stefano Babic Date: Mon, 29 Mar 2010 16:43:39 +0200 Subject: MX31: Add support for NAND to QONG board The NAND device is connected to the FPGA of the QONG board and not to the NFC controller. For this reason, the FPGA must be set and initialized before accessing to the NAND itself. Signed-off-by: Stefano Babic --- board/davedenx/qong/qong.c | 93 +++++++++++++++++++++++++++++++---------- board/davedenx/qong/qong_fpga.h | 4 +- 2 files changed, 74 insertions(+), 23 deletions(-) (limited to 'board/davedenx') diff --git a/board/davedenx/qong/qong.c b/board/davedenx/qong/qong.c index b80115003..e73d26b8f 100644 --- a/board/davedenx/qong/qong.c +++ b/board/davedenx/qong/qong.c @@ -25,6 +25,7 @@ #include #include #include +#include #include "qong_fpga.h" DECLARE_GLOBAL_DATA_PTR; @@ -38,6 +39,15 @@ int dram_init (void) return 0; } +static void qong_fpga_reset(void) +{ + mx31_gpio_set(QONG_FPGA_RST_PIN, 0); + udelay(30); + mx31_gpio_set(QONG_FPGA_RST_PIN, 1); + + udelay(300); +} + int board_init (void) { /* Chip selects */ @@ -101,6 +111,15 @@ int board_init (void) mx31_gpio_mux(IOMUX_MODE(0x91, MUX_CTL_OUT_FUNC | MUX_CTL_IN_GPIO)); mx31_gpio_mux(IOMUX_MODE(0x92, MUX_CTL_GPIO)); mx31_gpio_mux(IOMUX_MODE(0x93, MUX_CTL_GPIO)); + + /* FPGA reset Pin */ + /* rstn = 0 */ + mx31_gpio_set(QONG_FPGA_RST_PIN, 0); + mx31_gpio_direction(QONG_FPGA_RST_PIN, MX31_GPIO_DIRECTION_OUT); + + /* set interrupt pin as input */ + mx31_gpio_direction(QONG_FPGA_IRQ_PIN, MX31_GPIO_DIRECTION_IN); + #endif /* setup pins for UART1 */ @@ -127,32 +146,11 @@ int misc_init_r (void) #ifdef CONFIG_QONG_FPGA u32 tmp; - /* FPGA reset */ - /* rstn = 0 */ - tmp = __REG(GPIO2_BASE + GPIO_DR); - tmp &= (~(1 << QONG_FPGA_RST_PIN)); - __REG(GPIO2_BASE + GPIO_DR) = tmp; - /* set the GPIO as output */ - tmp = __REG(GPIO2_BASE + GPIO_GDIR); - tmp |= (1 << QONG_FPGA_RST_PIN); - __REG(GPIO2_BASE + GPIO_GDIR) = tmp; - /* wait */ - udelay(30); - /* rstn = 1 */ - tmp = __REG(GPIO2_BASE + GPIO_DR); - tmp |= (1 << QONG_FPGA_RST_PIN); - __REG(GPIO2_BASE + GPIO_DR) = tmp; - /* set interrupt pin as input */ - __REG(GPIO2_BASE + GPIO_GDIR) = tmp | (1 << QONG_FPGA_IRQ_PIN); - /* wait while the FPGA starts */ - udelay(300); - tmp = *(volatile u32*)QONG_FPGA_CTRL_VERSION; printf("FPGA: "); printf("version register = %u.%u.%u\n", (tmp & 0xF000) >> 12, (tmp & 0x0F00) >> 8, tmp & 0x00FF); #endif - return 0; } @@ -164,3 +162,56 @@ int board_eth_init(bd_t *bis) return 0; #endif } + +#if defined(CONFIG_QONG_FPGA) && defined(CONFIG_NAND_PLAT) +static void board_nand_setup(void) +{ + + /* CS3: NAND 8-bit */ + __REG(CSCR_U(3)) = 0x00004f00; + __REG(CSCR_L(3)) = 0x20013b31; + __REG(CSCR_A(3)) = 0x00020800; + __REG(IOMUXC_GPR) |= 1 << 13; + + mx31_gpio_mux(IOMUX_MODE(MUX_CTL_NFC_WP, MUX_CTL_IN_GPIO)); + mx31_gpio_mux(IOMUX_MODE(MUX_CTL_NFC_CE, MUX_CTL_IN_GPIO)); + mx31_gpio_mux(IOMUX_MODE(MUX_CTL_NFC_RB, MUX_CTL_IN_GPIO)); + + /* Make sure to reset the fpga else you cannot access NAND */ + qong_fpga_reset(); + + /* Enable NAND flash */ + mx31_gpio_set(15, 1); + mx31_gpio_set(14, 1); + mx31_gpio_direction(15, MX31_GPIO_DIRECTION_OUT); + mx31_gpio_direction(16, MX31_GPIO_DIRECTION_IN); + mx31_gpio_direction(14, MX31_GPIO_DIRECTION_IN); + mx31_gpio_set(15, 0); + +} + +int qong_nand_rdy(void *chip) +{ + udelay(1); + return mx31_gpio_get(16); +} + +void qong_nand_select_chip(struct mtd_info *mtd, int chip) +{ + if (chip >= 0) + mx31_gpio_set(15, 0); + else + mx31_gpio_set(15, 1); + +} + +void qong_nand_plat_init(void *chip) +{ + struct nand_chip *nand = (struct nand_chip *)chip; + nand->chip_delay = 20; + nand->select_chip = qong_nand_select_chip; + nand->options &= ~NAND_BUSWIDTH_16; + board_nand_setup(); +} + +#endif diff --git a/board/davedenx/qong/qong_fpga.h b/board/davedenx/qong/qong_fpga.h index e8042b131..4e11f5a1c 100644 --- a/board/davedenx/qong/qong_fpga.h +++ b/board/davedenx/qong/qong_fpga.h @@ -33,8 +33,8 @@ #define QONG_FPGA_TMS_PIN 25 #define QONG_FPGA_TDI_PIN 8 #define QONG_FPGA_TDO_PIN 7 -#define QONG_FPGA_RST_PIN 16 -#define QONG_FPGA_IRQ_PIN 8 +#define QONG_FPGA_RST_PIN 48 +#define QONG_FPGA_IRQ_PIN 40 #endif #endif /* QONG_FPGA_H */ -- cgit v1.2.3