From: Luca Lauro <[email protected]>
This adds full support for the Netgear ReadyNAS 102, including:
- board driver matching on "netgear,rn102"
- deep-probe use to ensure early GPIO availability
- lowlevel initialization
- barebox overlay with environment, state backend,
NAND partition layout and fastboot node
- Kconfig entry
- image support
Signed-off-by: Luca Lauro <[email protected]>
---
arch/arm/boards/Makefile | 1 +
arch/arm/boards/netgear-rn102/Makefile | 4 +
arch/arm/boards/netgear-rn102/board.c | 219 +++++++++++++++++++++++++++++++
arch/arm/boards/netgear-rn102/lowlevel.c | 58 ++++++++
arch/arm/dts/Makefile | 1 +
arch/arm/dts/armada-370-rn102-bb.dts | 96 ++++++++++++++
arch/arm/mach-mvebu/Kconfig | 4 +
images/Makefile.mvebu | 10 ++
8 files changed, 393 insertions(+)
diff --git a/arch/arm/boards/Makefile b/arch/arm/boards/Makefile
index dd2f2c324e..aca1b45a81 100644
--- a/arch/arm/boards/Makefile
+++ b/arch/arm/boards/Makefile
@@ -64,6 +64,7 @@ obj-$(CONFIG_MACH_MARVELL_ARMADA_XP_DB) +=
marvell-armada-xp-db/
obj-$(CONFIG_MACH_MX23EVK) += freescale-mx23-evk/
obj-$(CONFIG_MACH_MX28EVK) += freescale-mx28-evk/
obj-$(CONFIG_MACH_MYIRTECH_X335X) += myirtech-x335x/
+obj-$(CONFIG_MACH_NETGEAR_RN102) += netgear-rn102/
obj-$(CONFIG_MACH_NETGEAR_RN104) += netgear-rn104/
obj-$(CONFIG_MACH_NETGEAR_RN2120) += netgear-rn2120/
obj-$(CONFIG_MACH_NVIDIA_BEAVER) += nvidia-beaver/
diff --git a/arch/arm/boards/netgear-rn102/Makefile
b/arch/arm/boards/netgear-rn102/Makefile
new file mode 100644
index 0000000000..da63d2625f
--- /dev/null
+++ b/arch/arm/boards/netgear-rn102/Makefile
@@ -0,0 +1,4 @@
+# SPDX-License-Identifier: GPL-2.0-only
+
+obj-y += board.o
+lwl-y += lowlevel.o
diff --git a/arch/arm/boards/netgear-rn102/board.c
b/arch/arm/boards/netgear-rn102/board.c
new file mode 100644
index 0000000000..651ce27ffa
--- /dev/null
+++ b/arch/arm/boards/netgear-rn102/board.c
@@ -0,0 +1,219 @@
+// SPDX-License-Identifier: GPL-2.0-only
+
+#include <common.h>
+#include <init.h>
+#include <gpio.h>
+#include <driver.h>
+#include <of.h>
+#include <linux/device.h>
+#include <linux/mbus.h>
+#include <mach/mvebu/armada-370-xp-regs.h>
+#include <bbu.h>
+
+#define GPIO_BLINK_EN 0x08
+#define GPIO_BLINK_CNT_SEL 0x20
+#define GPIO_BLINK_CNT_A_ON 0xc0
+#define GPIO_BLINK_CNT_A_OFF 0xc4
+
+/*
+ * we use GPIO for:
+ * - reading disk presence monitoring pins
+ * - enable powerup for bays that detect disk presence
+ * - display bay status with dedicated LEDs
+ */
+static void gpio_blink(struct device *dev, int pin, int on_ms, int off_ms)
+{
+ struct device_node *np;
+ struct regmap *map;
+ u32 v;
+
+ np = of_find_node_by_alias(NULL, "gpio0");
+ if (!np) {
+ pr_warn("gpio0 alias not found\n");
+ return;
+ }
+
+ map = syscon_node_to_regmap(np);
+ if (IS_ERR(map)) {
+ pr_warn("gpio0 regmap not available\n");
+ return;
+ }
+
+ /* set blink counter A on and off time in core clok cycles */
+ regmap_write(map, GPIO_BLINK_CNT_A_ON, 10 * on_ms);
+ regmap_write(map, GPIO_BLINK_CNT_A_OFF, 10 * off_ms);
+
+ /* select blink counter A for this pin */
+ regmap_read(map, GPIO_BLINK_CNT_SEL, &v);
+ v &= ~(1 << pin);
+ regmap_write(map, GPIO_BLINK_CNT_SEL, v);
+
+ /* enable blink */
+ regmap_read(map, GPIO_BLINK_EN, &v);
+ v |= (1 << pin);
+ regmap_write(map, GPIO_BLINK_EN, v);
+}
+
+static void gpio_blink_disable(struct device *dev, int pin)
+{
+ struct device_node *np;
+ struct regmap *map;
+ u32 v;
+
+ np = of_find_node_by_alias(NULL, "gpio0");
+ if (!np)
+ return;
+
+ map = syscon_node_to_regmap(np);
+ if (IS_ERR(map))
+ return;
+
+ regmap_read(map, GPIO_BLINK_EN, &v);
+ v &= ~(1 << pin);
+ regmap_write(map, GPIO_BLINK_EN, v);
+}
+
+/* HDD bays description */
+
+enum disk_state {
+ DISK_ABSENT = 0,
+ DISK_PRESENT,
+ DISK_READY,
+};
+
+struct rn102_disk_bay {
+ int gpio_detect; /* input, active-low */
+ int gpio_power; /* output */
+ int gpio_led; /* output, active-low */
+ enum disk_state state;
+};
+
+#define RN102_NUM_DISK_BAYS 2
+
+static struct rn102_disk_bay rn102_bays[RN102_NUM_DISK_BAYS] = {
+ { 12, 13, 15, DISK_ABSENT }, /* Bay 1, default to disk absent */
+ { 10, 11, 14, DISK_ABSENT }, /* Bay 2, default to disk absent */
+};
+
+static void setup_bays(struct device *dev)
+{
+ pr_info("Early disk power-on...\n");
+
+ for (int i = 0; i < RN102_NUM_DISK_BAYS; i++) {
+ int present;
+
+ gpio_direction_input(rn102_bays[i].gpio_detect);
+ present = !gpio_get_value(rn102_bays[i].gpio_detect);
+
+ if (present) {
+ pr_info("Bay %d: disk detected, powering on\n", i + 1);
+ gpio_blink(dev, rn102_bays[i].gpio_led, 500, 500);
+ gpio_direction_output(rn102_bays[i].gpio_power, 1);
+ rn102_bays[i].state = DISK_PRESENT;
+ } else {
+ pr_info("Bay %d empty\n", i + 1);
+ gpio_direction_output(rn102_bays[i].gpio_led, 0);
+ gpio_direction_output(rn102_bays[i].gpio_power, 0);
+ rn102_bays[i].state = DISK_ABSENT;
+ }
+ }
+}
+
+/*
+ * After waiting for present disks spinup,
+ * we ask explicitly for corresponding ATA devices probe.
+ */
+static void init_disks(struct device *dev)
+{
+ pr_info("Waiting for disks spinup...\n");
+ mdelay(8000);
+
+ pr_info("Detecting ATA devices:\n");
+ for (int i = 0; i < RN102_NUM_DISK_BAYS; i++) {
+ char name[8];
+ struct device *dev;
+
+ if (rn102_bays[i].state != DISK_PRESENT) {
+ gpio_direction_output(rn102_bays[i].gpio_power, 0);
+ gpio_blink_disable(dev, rn102_bays[i].gpio_led);
+ gpio_direction_output(rn102_bays[i].gpio_led, 0);
+ continue;
+ }
+
+ snprintf(name, sizeof(name), "ata%d", i);
+
+ dev = get_device_by_name(name);
+ if (!dev) {
+ pr_warn("%s not found\n", name);
+ gpio_direction_output(rn102_bays[i].gpio_power, 0);
+ gpio_blink(dev, rn102_bays[i].gpio_led, 1000, 1000);
+ continue;
+ }
+
+ pr_info("Connecting %s to disk %d\n", name, i + 1);
+ device_detect(dev);
+ gpio0_blink_disable(rn102_bays[i].gpio_led);
+ gpio0_write(rn102_bays[i].gpio_led, 1);
+ rn102_bays[i].state = DISK_READY;
+ }
+}
+
+/*
+ * USB0 → DRAM MBUS windows
+ *
+ * frontal USB 2.0 port of RN102 is connected to the SoC usb0.
+ * Here we enable MBUS windows toward all the DRAM using
+ * informations already gathered by mvebu_mbus_dram_info().
+ *
+ * NOTE: Armada 370-XP EHCI controller shows instability when the periodic
+ * schedule is enabled.
+ */
+static void setup_usb0(void)
+{
+ writel(0x2, 0xf1051404); /* enable force suspend */
+ u32 pwr = readl(0xf1051400);
+ pwr &= ~BIT(2);
+ writel(pwr, 0xf1051400); /* force SUSPENDM=0 */
+}
+
+/*
+ * RN102 board driver
+ *
+ * Preferred pattern: board-specific code as a platform driver
+ * matching on the root DT node ("netgear,rn102").
+ */
+static int rn102_probe(struct device *dev)
+{
+ of_device_ensure_probed_by_alias("gpio0");
+ of_device_ensure_probed_by_alias("gpio1");
+ of_device_ensure_probed_by_alias("gpio2");
+
+
+ /* CFU configuration */
+ writel(0xC6, 0xf1020228);
+
+ setup_usb0();
+ setup_bays(dev);
+ init_disks(dev);
+
+ /* Barebox Update handlers */
+ bbu_register_std_file_update("bootloader", 0,
+ "/dev/nand0.bootloader",
+ filetype_kwbimage_v1);
+
+ return 0;
+}
+
+static const struct of_device_id rn102_of_match[] = {
+ { .compatible = "netgear,rn102" },
+ { }
+};
+MODULE_DEVICE_TABLE(of, rn102_of_match);
+
+static struct driver rn102_driver = {
+ .name = "rn102",
+ .probe = rn102_probe,
+ .of_match_table = rn102_of_match,
+};
+
+device_platform_driver(rn102_driver);
diff --git a/arch/arm/boards/netgear-rn102/lowlevel.c
b/arch/arm/boards/netgear-rn102/lowlevel.c
new file mode 100644
index 0000000000..c1680cee82
--- /dev/null
+++ b/arch/arm/boards/netgear-rn102/lowlevel.c
@@ -0,0 +1,58 @@
+// SPDX-License-Identifier: GPL-2.0-only
+
+#include <common.h>
+#include <asm/barebox-arm.h>
+#include <mach/mvebu/lowlevel.h>
+#include <mach/mvebu/barebox-arm-head.h>
+#include <mach/mvebu/armada-370-xp-regs.h>
+
+extern char __dtb_armada_370_rn102_bb_start[];
+
+#define INTERNAL_REG_BASE_ADDR 0x20080
+
+static __always_inline void mvebu_remap_registers(void)
+{
+ void __iomem *base = mvebu_get_initial_int_reg_base();
+
+ writel(MVEBU_REMAP_INT_REG_BASE, base + INTERNAL_REG_BASE_ADDR);
+}
+
+/*
+ * NOTE:
+ * armada_370_xp_barebox_entry() cannot be used here because the
+ * upstream SDRAM size detection for Armada 370-XP misinterprets
+ * the DDR_SIZE_CSn registers on this board and reports an incorrect
+ * memory size (256MB instead of 512MB on RN102).
+ *
+ * Until the generic detection code is fixed, we compute the SDRAM
+ * size manually using the DDR_SIZE_CSn values.
+ */
+static unsigned long armada_370_xp_memory_find(void)
+{
+ unsigned long mem_size = 0;
+
+ for (int cs = 0; cs < 4; cs++) {
+ u32 ctrl = readl(ARMADA_370_XP_SDRAM_BASE + DDR_SIZE_CSn(cs));
+
+ /* Skip non-enabled CS */
+ if ((ctrl & DDR_SIZE_ENABLED) != DDR_SIZE_ENABLED)
+ continue;
+
+ mem_size += (ctrl | ~DDR_SIZE_MASK) + 1;
+ }
+
+ return mem_size;
+}
+
+ENTRY_FUNCTION_MVEBU(start_netgear_rn102, r0, r1, r2)
+{
+ void *fdt;
+
+ arm_cpu_lowlevel_init();
+
+ fdt = __dtb_armada_370_rn102_bb_start +
+ get_runtime_offset();
+
+ mvebu_remap_registers();
+ barebox_arm_entry(0, armada_370_xp_memory_find(), fdt);
+}
diff --git a/arch/arm/dts/Makefile b/arch/arm/dts/Makefile
index a84e09e388..5d1b21b615 100644
--- a/arch/arm/dts/Makefile
+++ b/arch/arm/dts/Makefile
@@ -51,6 +51,7 @@ lwl-$(CONFIG_MACH_MARVELL_ARMADA_XP_GP) +=
armada-xp-gp-bb.dtb.o
lwl-$(CONFIG_MACH_MARVELL_ARMADA_XP_DB) += armada-xp-db-bb.dtb.o
lwl-$(CONFIG_MACH_MX28EVK) += imx28-evk.dtb.o
lwl-$(CONFIG_MACH_MYIRTECH_X335X) += am335x-myirtech-myd.dtb.o
am335x-myirtech-myd-mlo.dtb.o
+lwl-$(CONFIG_MACH_NETGEAR_RN102) += armada-370-rn102-bb.dtb.o
lwl-$(CONFIG_MACH_NETGEAR_RN104) += armada-370-rn104-bb.dtb.o
lwl-$(CONFIG_MACH_NETGEAR_RN2120) += armada-xp-rn2120-bb.dtb.o
lwl-$(CONFIG_MACH_NITROGEN6) += imx6q-nitrogen6x.dtb.o imx6dl-nitrogen6x.dtb.o
imx6qp-nitrogen6_max.dtb.o
diff --git a/arch/arm/dts/armada-370-rn102-bb.dts
b/arch/arm/dts/armada-370-rn102-bb.dts
new file mode 100644
index 0000000000..3947b365fe
--- /dev/null
+++ b/arch/arm/dts/armada-370-rn102-bb.dts
@@ -0,0 +1,96 @@
+/*
+ * Barebox specific DT overlay for Netgear ReadyNAS 102
+ */
+
+#include "arm/marvell/armada-370-netgear-rn102.dts"
+
+/ {
+ barebox,deep-probe;
+
+ chosen {
+ stdout-path = &uart0;
+ };
+
+ aliases {
+ state = &state_nand;
+ };
+
+ /* configure nand partition to store barebox environment */
+ environment {
+ compatible = "barebox,environment";
+ device-path = &nand_controller, "partname:environment";
+ };
+
+ /* configure nand partition to store barebox-state backend */
+ state_nand: nand_state_memory {
+ #address-cells = <1>;
+ #size-cells = <1>;
+ compatible = "barebox,state";
+ magic = <0xab67421f>;
+ backend-type = "raw";
+ backend = <&backend_state_nand>;
+ backend-storage-type = "circular";
+ backend-stridesize = <32>;
+
+ variable@0 {
+ reg = <0x0 0x1>;
+ type = "uint8";
+ default = <0x1>;
+ };
+ };
+};
+
+&nand_controller {
+ compatible = "marvell,armada370-nand", "marvell,pxa3xx-nand";
+ status = "okay";
+
+ nand-rb = <0>;
+ marvell,nand-keep-config;
+ nand-on-flash-bbt;
+
+ nand-ecc-strength = <4>;
+ nand-ecc-step-size = <512>;
+
+ partitions {
+ compatible = "fixed-partitions";
+ #address-cells = <1>;
+ #size-cells = <1>;
+
+ partition@0 {
+ label = "bootloader";
+ reg = <0x0 0x400000>;
+ };
+
+ partition@400000 {
+ label = "environment";
+ reg = <0x400000 0x80000>;
+ };
+
+ backend_state_nand: partition@480000 {
+ label = "state";
+ reg = <0x480000 0x80000>;
+ };
+
+ partition@500000 {
+ label = "kernel";
+ reg = <0x500000 0x1400000>;
+ };
+
+ partition@1900000 {
+ label = "minirootfs";
+ reg = <0x1900000 0x6000000>;
+ };
+ };
+};
+
+fastboot {
+ partition@kernel {
+ label = "kernel";
+ reg = <0x500000 0x1400000>;
+ };
+
+ partition@minirootfs {
+ label = "minirootfs";
+ reg = <0x1900000 0x6000000>;
+ };
+};
diff --git a/arch/arm/mach-mvebu/Kconfig b/arch/arm/mach-mvebu/Kconfig
index ed1302af65..046d539656 100644
--- a/arch/arm/mach-mvebu/Kconfig
+++ b/arch/arm/mach-mvebu/Kconfig
@@ -37,6 +37,10 @@ config MACH_GLOBALSCALE_MIRABOX
bool "Globalscale Mirabox"
select ARCH_ARMADA_370
+config MACH_NETGEAR_RN102
+ bool "Netgear ReadyNAS 102"
+ select ARCH_ARMADA_370
+
config MACH_NETGEAR_RN104
bool "Netgear ReadyNAS 104"
select ARCH_ARMADA_370
diff --git a/images/Makefile.mvebu b/images/Makefile.mvebu
index 7c918cb9f1..1741f0e9a5 100644
--- a/images/Makefile.mvebu
+++ b/images/Makefile.mvebu
@@ -27,6 +27,16 @@ image-$(CONFIG_MACH_GLOBALSCALE_MIRABOX) +=
barebox-globalscale-mirabox.img
FILE_barebox-globalscale-mirabox-2nd.img = start_globalscale_mirabox.pblb
image-$(CONFIG_MACH_GLOBALSCALE_MIRABOX) += barebox-globalscale-mirabox-2nd.img
+BOOTSRC_start_netgear_rn102.pblb.mvebu1img = nand
+BINHDR_start_netgear_rn102.pblb.mvebu1img = $(board)/netgear-rn102/binary.0
+FLAGS_start_netgear_rn102.pblb.mvebu1img = -B 0x20000:1 -d 0x0 -e 0x0
+FILE_barebox-netgear-rn102.img = start_netgear_rn102.pblb.mvebu1img
+pblb-$(CONFIG_MACH_NETGEAR_RN102) += start_netgear_rn102
+image-$(CONFIG_MACH_NETGEAR_RN102) += barebox-netgear-rn102.img
+
+FILE_barebox-netgear-rn102-2nd.img = start_netgear_rn102.pblb
+image-$(CONFIG_MACH_NETGEAR_RN102) += barebox-netgear-rn102-2nd.img
+
FLAGS_start_netgear_rn104.pblb.mvebu1img = -d 0x600000 -e 0x6e0000
BOOTSRC_start_netgear_rn104.pblb.mvebu1img = nand
BINHDR_start_netgear_rn104.pblb.mvebu1img = $(board)/netgear-rn104/binary.0
--
2.47.3
