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authorpekon gupta <pekon@ti.com>2014-07-22 16:03:22 +0530
committerTom Rini <trini@ti.com>2014-08-25 10:48:12 -0400
commite53ad4b445464327aebd1c5ea6260b7bb9b80ae7 (patch)
treefe5edc497d51831f96b3abdccae854033889e3c1 /board
parent3df3bc1e1dc4c38de93d66fb589565f36d9749c7 (diff)
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board/ti/am43xx: add support for parallel NAND
This patch adds support for NAND device connected to GPMC chip-select on following AM43xx EVM boards. am437x-gp-evm: On this board, NAND Flash signals are muxed with eMMC, thus at a time either eMMC or NAND can be enabled. Selection between eMMC and NAND is controlled by: (a) Statically using Jumper on connecter (J89) present on board. (a) If Jumper on J89 is NOT used, then selection can be dynamically controlled by driving SPI2_CS0[MUX_MODE=GPIO] pin via software: SPI2_CS0 == 0: NAND (default) SPI2_CS0 == 1: eMMC am43x-epos-evm: On this board, NAND Flash control lines are muxed with QSPI, Thus only one of the two can be used at a time. Selection is controlled by: (a) Dynamically driving following GPIO pin from software GPMC_A0(GPIO) == 0 NAND is selected (default) NAND device (MT29F4G08AB) on these boards has: - data-width=8bits - blocksize=256KB - pagesize=4KB - oobsize=224 bytes For above NAND device, ROM code expects the boot-loader to be flashed in BCH16 ECC scheme for NAND boot, So by default BCH16 ECC is enabled for AM43xx EVMs. Signed-off-by: Pekon Gupta <pekon@ti.com>
Diffstat (limited to 'board')
-rw-r--r--board/ti/am43xx/board.c1
-rw-r--r--board/ti/am43xx/mux.c43
2 files changed, 43 insertions, 1 deletions
diff --git a/board/ti/am43xx/board.c b/board/ti/am43xx/board.c
index 51fa9e0..a1c3c17 100644
--- a/board/ti/am43xx/board.c
+++ b/board/ti/am43xx/board.c
@@ -626,6 +626,7 @@ int board_init(void)
modena_init0_bw_integer, modena_init0_watermark_0;
gd->bd->bi_boot_params = CONFIG_SYS_SDRAM_BASE + 0x100;
+ gpmc_init();
/* Clear all important bits for DSS errata that may need to be tweaked*/
mreqprio_0 = readl(&cdev->mreqprio_0) & MREQPRIO_0_SAB_INIT1_MASK &
diff --git a/board/ti/am43xx/mux.c b/board/ti/am43xx/mux.c
index 50967e1..a670b0b 100644
--- a/board/ti/am43xx/mux.c
+++ b/board/ti/am43xx/mux.c
@@ -73,7 +73,38 @@ static struct module_pin_mux gpio5_7_pin_mux[] = {
{-1},
};
-static struct module_pin_mux qspi_pin_mux[] = {
+#ifdef CONFIG_NAND
+static struct module_pin_mux nand_pin_mux[] = {
+ {OFFSET(gpmc_ad0), (MODE(0) | PULLUDDIS | RXACTIVE)}, /* AD0 */
+ {OFFSET(gpmc_ad1), (MODE(0) | PULLUDDIS | RXACTIVE)}, /* AD1 */
+ {OFFSET(gpmc_ad2), (MODE(0) | PULLUDDIS | RXACTIVE)}, /* AD2 */
+ {OFFSET(gpmc_ad3), (MODE(0) | PULLUDDIS | RXACTIVE)}, /* AD3 */
+ {OFFSET(gpmc_ad4), (MODE(0) | PULLUDDIS | RXACTIVE)}, /* AD4 */
+ {OFFSET(gpmc_ad5), (MODE(0) | PULLUDDIS | RXACTIVE)}, /* AD5 */
+ {OFFSET(gpmc_ad6), (MODE(0) | PULLUDDIS | RXACTIVE)}, /* AD6 */
+ {OFFSET(gpmc_ad7), (MODE(0) | PULLUDDIS | RXACTIVE)}, /* AD7 */
+#ifdef CONFIG_SYS_NAND_BUSWIDTH_16BIT
+ {OFFSET(gpmc_ad8), (MODE(0) | PULLUDDIS | RXACTIVE)}, /* AD8 */
+ {OFFSET(gpmc_ad9), (MODE(0) | PULLUDDIS | RXACTIVE)}, /* AD9 */
+ {OFFSET(gpmc_ad10), (MODE(0) | PULLUDDIS | RXACTIVE)}, /* AD10 */
+ {OFFSET(gpmc_ad11), (MODE(0) | PULLUDDIS | RXACTIVE)}, /* AD11 */
+ {OFFSET(gpmc_ad12), (MODE(0) | PULLUDDIS | RXACTIVE)}, /* AD12 */
+ {OFFSET(gpmc_ad13), (MODE(0) | PULLUDDIS | RXACTIVE)}, /* AD13 */
+ {OFFSET(gpmc_ad14), (MODE(0) | PULLUDDIS | RXACTIVE)}, /* AD14 */
+ {OFFSET(gpmc_ad15), (MODE(0) | PULLUDDIS | RXACTIVE)}, /* AD15 */
+#endif
+ {OFFSET(gpmc_wait0), (MODE(0) | RXACTIVE | PULLUP_EN)}, /* Wait */
+ {OFFSET(gpmc_wpn), (MODE(7) | PULLUP_EN)}, /* Write Protect */
+ {OFFSET(gpmc_csn0), (MODE(0) | PULLUP_EN)}, /* Chip-Select */
+ {OFFSET(gpmc_wen), (MODE(0) | PULLDOWN_EN)}, /* Write Enable */
+ {OFFSET(gpmc_oen_ren), (MODE(0) | PULLDOWN_EN)}, /* Read Enable */
+ {OFFSET(gpmc_advn_ale), (MODE(0) | PULLDOWN_EN)}, /* Addr Latch Enable*/
+ {OFFSET(gpmc_be0n_cle), (MODE(0) | PULLDOWN_EN)}, /* Byte Enable */
+ {-1},
+};
+#endif
+
+static __maybe_unused struct module_pin_mux qspi_pin_mux[] = {
{OFFSET(gpmc_csn0), (MODE(3) | PULLUP_EN | RXACTIVE)}, /* QSPI_CS0 */
{OFFSET(gpmc_csn3), (MODE(2) | PULLUP_EN | RXACTIVE)}, /* QSPI_CLK */
{OFFSET(gpmc_advn_ale), (MODE(3) | PULLUP_EN | RXACTIVE)}, /* QSPI_D0 */
@@ -97,12 +128,22 @@ void enable_board_pin_mux(void)
if (board_is_gpevm()) {
configure_module_pin_mux(gpio5_7_pin_mux);
configure_module_pin_mux(rgmii1_pin_mux);
+#if defined(CONFIG_NAND)
+ configure_module_pin_mux(nand_pin_mux);
+#endif
} else if (board_is_sk()) {
configure_module_pin_mux(rgmii1_pin_mux);
+#if defined(CONFIG_NAND)
+ printf("Error: NAND flash not present on this board\n");
+#endif
configure_module_pin_mux(qspi_pin_mux);
} else if (board_is_eposevm()) {
configure_module_pin_mux(rmii1_pin_mux);
+#if defined(CONFIG_NAND)
+ configure_module_pin_mux(nand_pin_mux);
+#else
configure_module_pin_mux(qspi_pin_mux);
+#endif
}
}