[PATCH v1 1/3] ARM: dts: am335x-bone: add support for beaglebone NAND cape
Pekon Gupta
pekon at ti.com
Tue Jun 24 05:24:24 PDT 2014
Beaglebone Board can be connected to expansion boards to add devices to them.
These expansion boards are called 'capes'. This patch adds support for
following versions of Beaglebone(AM335x) NAND capes
(a) NAND Device with bus-width=16, block-size=128k, page-size=2k, oob-size=64
(b) NAND Device with bus-width=16, block-size=256k, page-size=4k, oob-size=224
Further information and datasheets can be found at [1] and [2]
* How to boot from NAND using Memory Expander + NAND Cape ? *
- Important: As BOOTSEL values are sampled only at POR, so after changing any
setting on SW2 (DIP switch), disconnect and reconnect all board power supply
(including mini-USB console port) to POR the beaglebone.
- Selection of ECC scheme
for NAND cape(a), ROM code expects BCH8_HW ecc-scheme
for NAND cape(b), ROM code expects BCH16_HW ecc-scheme
- Selection of boot modes can be controlled via DIP switch(SW2) present on
Memory Expander cape, so first boot via MMC or other sources to flash NAND
device and then switch to SW2[SWITCH_BOOT]=ON to boot from NAND Cape.
SW2[SWITCH_BOOT] == OFF follow default boot order MMC-> SPI -> UART -> USB
SW2[SWITCH_BOOT] == ON boot mode selected via DIP switch(SW2)
- For NAND boot following switch settings need to be followed
SW2[ 1] = ON (SYSBOOT[ 0]==0: NAND boot mode selected )
SW2[ 2] = ON (SYSBOOT[ 1]==0: -- do -- )
SW2[ 3] = OFF (SYSBOOT[ 2]==1: -- do -- )
SW2[ 4] = OFF (SYSBOOT[ 3]==1: -- do -- )
SW2[ 5] = ON (SYSBOOT[ 4]==0: -- do -- )
SW2[ 6] = OFF (SYSBOOT[ 8]==1: 0:x8 device, 1:x16 device )
SW2[ 7] = ON (SYSBOOT[ 9]==0: ECC done by ROM )
SW2[ 8] = ON (SYSBOOT[10]==0: Non Muxed device )
SW2[ 9] = ON (SYSBOOT[11]==0: -- do -- )
[1] http://beagleboardtoys.info/index.php?title=BeagleBone_Memory_Expansion
[2] http://beagleboardtoys.info/index.php?title=BeagleBone_4Gb_16-Bit_NAND_Module
Signed-off-by: Pekon Gupta <pekon at ti.com>
Reviewed-by: Javier Martinez Canillas <javier at dowhile0.org>
---
arch/arm/boot/dts/am335x-bone-memory-cape.dts | 127 ++++++++++++++++++++++++++
arch/arm/boot/dts/am335x-bone.dts | 1 +
arch/arm/boot/dts/am335x-boneblack.dts | 1 +
3 files changed, 129 insertions(+)
create mode 100644 arch/arm/boot/dts/am335x-bone-memory-cape.dts
diff --git a/arch/arm/boot/dts/am335x-bone-memory-cape.dts b/arch/arm/boot/dts/am335x-bone-memory-cape.dts
new file mode 100644
index 0000000..6d8ebd8
--- /dev/null
+++ b/arch/arm/boot/dts/am335x-bone-memory-cape.dts
@@ -0,0 +1,127 @@
+/*
+ * Copyright (C) 2014 Texas Instruments Incorporated - http://www.ti.com/
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * This DTS adds supports for capes using GPMC interface to connect external
+ * memory like NAND, NOR Flash to Beaglebone-White and Beaglebone-Black.
+ */
+
+
+&am33xx_pinmux {
+ bbcape_nand_flash_pins: bbcape_nand_flash_pins {
+ pinctrl-single,pins = <
+ 0x00 (MUX_MODE0 | PIN_INPUT) /* gpmc_ad0.gpmc_ad0 */
+ 0x04 (MUX_MODE0 | PIN_INPUT) /* gpmc_ad1.gpmc_ad1 */
+ 0x08 (MUX_MODE0 | PIN_INPUT) /* gpmc_ad2.gpmc_ad2 */
+ 0x0c (MUX_MODE0 | PIN_INPUT) /* gpmc_ad3.gpmc_ad3 */
+ 0x10 (MUX_MODE0 | PIN_INPUT) /* gpmc_ad4.gpmc_ad4 */
+ 0x14 (MUX_MODE0 | PIN_INPUT) /* gpmc_ad5.gpmc_ad5 */
+ 0x18 (MUX_MODE0 | PIN_INPUT) /* gpmc_ad6.gpmc_ad6 */
+ 0x1c (MUX_MODE0 | PIN_INPUT) /* gpmc_ad7.gpmc_ad7 */
+ 0x20 (MUX_MODE0 | PIN_INPUT) /* gpmc_ad8.gpmc_ad8 */
+ 0x24 (MUX_MODE0 | PIN_INPUT) /* gpmc_ad9.gpmc_ad9 */
+ 0x28 (MUX_MODE0 | PIN_INPUT) /* gpmc_ad10.gpmc_ad10 */
+ 0x2c (MUX_MODE0 | PIN_INPUT) /* gpmc_ad11.gpmc_ad11 */
+ 0x30 (MUX_MODE0 | PIN_INPUT) /* gpmc_ad12.gpmc_ad12 */
+ 0x34 (MUX_MODE0 | PIN_INPUT) /* gpmc_ad13.gpmc_ad13 */
+ 0x38 (MUX_MODE0 | PIN_INPUT) /* gpmc_ad14.gpmc_ad14 */
+ 0x3c (MUX_MODE0 | PIN_INPUT) /* gpmc_ad15.gpmc_ad15 */
+ 0x70 (MUX_MODE0 | PIN_INPUT_PULLUP ) /* gpmc_wait0.gpmc_wait0 */
+ 0x74 (MUX_MODE0 | PIN_OUTPUT_PULLUP) /* gpmc_wpn.gpmc_wpn */
+ 0x7c (MUX_MODE0 | PIN_OUTPUT_PULLUP) /* gpmc_csn0.gpmc_csn0 */
+ 0x90 (MUX_MODE0 | PIN_OUTPUT) /* gpmc_advn_ale.gpmc_advn_ale */
+ 0x94 (MUX_MODE0 | PIN_OUTPUT) /* gpmc_oen_ren.gpmc_oen_ren */
+ 0x98 (MUX_MODE0 | PIN_OUTPUT) /* gpmc_wen.gpmc_wen */
+ 0x9c (MUX_MODE0 | PIN_OUTPUT) /* gpmc_be0n_cle.gpmc_be0n_cle */
+ >;
+ };
+};
+
+
+&gpmc {
+ ranges = <0 0 0 0x01000000>; /* address range = 16MB (minimum GPMC partition) */
+ nand at 0,0 {
+ status = "disabled";
+ reg = <0 0 4>; /* device IO registers */
+ pinctrl-names = "default";
+ pinctrl-0 = <&bbcape_nand_flash_pins>;
+ ti,nand-ecc-opt = "bch8";
+ ti,elm-id = <&elm>;
+ /* generic bindings */
+ nand-bus-width = <16>;
+ /* vendor specific bindings */
+ gpmc,device-width = <2>;
+ gpmc,sync-clk-ps = <0>;
+ gpmc,cs-on-ns = <0>;
+ gpmc,cs-rd-off-ns = <80>;
+ gpmc,cs-wr-off-ns = <80>;
+ gpmc,adv-on-ns = <0>;
+ gpmc,adv-rd-off-ns = <80>;
+ gpmc,adv-wr-off-ns = <80>;
+ gpmc,we-on-ns = <20>;
+ gpmc,we-off-ns = <60>;
+ gpmc,oe-on-ns = <20>;
+ gpmc,oe-off-ns = <60>;
+ gpmc,access-ns = <40>;
+ gpmc,rd-cycle-ns = <80>;
+ gpmc,wr-cycle-ns = <80>;
+ gpmc,wait-pin = <0>;
+ gpmc,wait-on-read;
+ gpmc,wait-on-write;
+ gpmc,bus-turnaround-ns = <0>;
+ gpmc,cycle2cycle-delay-ns = <0>;
+ gpmc,clk-activation-ns = <0>;
+ gpmc,wait-monitoring-ns = <0>;
+ gpmc,wr-access-ns = <40>;
+ gpmc,wr-data-mux-bus-ns = <0>;
+ /* MTD partition table */
+ /* All SPL-* partitions are sized to minimal length
+ * which can be independently programmable. For
+ * NAND flash this is equal to size of erase-block */
+ #address-cells = <1>;
+ #size-cells = <1>;
+ partition at 0 {
+ label = "NAND.SPL";
+ reg = <0x00000000 0x00040000>;
+ };
+ partition at 1 {
+ label = "NAND.SPL.backup1";
+ reg = <0x00040000 0x00040000>;
+ };
+ partition at 2 {
+ label = "NAND.SPL.backup2";
+ reg = <0x00080000 0x00040000>;
+ };
+ partition at 3 {
+ label = "NAND.SPL.backup3";
+ reg = <0x000c0000 0x00040000>;
+ };
+ partition at 4 {
+ label = "NAND.u-boot-spl-os";
+ reg = <0x00100000 0x00080000>;
+ };
+ partition at 5 {
+ label = "NAND.u-boot";
+ reg = <0x00180000 0x00100000>;
+ };
+ partition at 6 {
+ label = "NAND.u-boot-env";
+ reg = <0x00280000 0x00040000>;
+ };
+ partition at 7 {
+ label = "NAND.u-boot-env.backup1";
+ reg = <0x002c0000 0x00040000>;
+ };
+ partition at 8 {
+ label = "NAND.kernel";
+ reg = <0x00300000 0x00700000>;
+ };
+ partition at 9 {
+ label = "NAND.file-system";
+ reg = <0x00a00000 0x1f600000>;
+ };
+ };
+};
diff --git a/arch/arm/boot/dts/am335x-bone.dts b/arch/arm/boot/dts/am335x-bone.dts
index 94ee427..f16bfcf 100644
--- a/arch/arm/boot/dts/am335x-bone.dts
+++ b/arch/arm/boot/dts/am335x-bone.dts
@@ -9,6 +9,7 @@
#include "am33xx.dtsi"
#include "am335x-bone-common.dtsi"
+#include "am335x-bone-memory-cape.dts"
&ldo3_reg {
regulator-min-microvolt = <1800000>;
diff --git a/arch/arm/boot/dts/am335x-boneblack.dts b/arch/arm/boot/dts/am335x-boneblack.dts
index 305975d..e6d7e54 100644
--- a/arch/arm/boot/dts/am335x-boneblack.dts
+++ b/arch/arm/boot/dts/am335x-boneblack.dts
@@ -9,6 +9,7 @@
#include "am33xx.dtsi"
#include "am335x-bone-common.dtsi"
+#include "am335x-bone-memory-cape.dts"
&ldo3_reg {
regulator-min-microvolt = <1800000>;
--
1.8.5.1.163.gd7aced9
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