[U-Boot] [PATCH v4 03/10] arm: mvebu: turris_mox: Check and configure modules
Marek Behún
marek.behun at nic.cz
Mon Dec 17 15:10:03 UTC 2018
Check if Mox modules are connected in supported mode, then configure
the MDIO addresses of switch modules.
Signed-off-by: Marek Behún <marek.behun at nic.cz>
---
arch/arm/dts/armada-3720-turris-mox.dts | 11 ++
board/CZ.NIC/turris_mox/turris_mox.c | 234 +++++++++++++++++++++++-
2 files changed, 244 insertions(+), 1 deletion(-)
diff --git a/arch/arm/dts/armada-3720-turris-mox.dts b/arch/arm/dts/armada-3720-turris-mox.dts
index 7babc16679..ff54ce5d0f 100644
--- a/arch/arm/dts/armada-3720-turris-mox.dts
+++ b/arch/arm/dts/armada-3720-turris-mox.dts
@@ -110,6 +110,17 @@
spi-max-frequency = <20000000>;
m25p,fast-read;
};
+
+ moxtet at 1 {
+ #address-cells = <1>;
+ #size-cells = <0>;
+ compatible = "cznic,moxtet";
+ reg = <1>;
+ reset-gpios = <&gpiosb 2 GPIO_ACTIVE_LOW>;
+ spi-max-frequency = <1000000>;
+ spi-cpol;
+ spi-cpha;
+ };
};
&uart0 {
diff --git a/board/CZ.NIC/turris_mox/turris_mox.c b/board/CZ.NIC/turris_mox/turris_mox.c
index 3c0ab58756..4426ee3446 100644
--- a/board/CZ.NIC/turris_mox/turris_mox.c
+++ b/board/CZ.NIC/turris_mox/turris_mox.c
@@ -4,11 +4,13 @@
*/
#include <common.h>
+#include <asm/gpio.h>
#include <asm/io.h>
#include <dm.h>
#include <clk.h>
#include <spi.h>
#include <mvebu/comphy.h>
+#include <miiphy.h>
#include <linux/string.h>
#include <linux/libfdt.h>
#include <fdt_support.h>
@@ -239,11 +241,138 @@ int comphy_update_map(struct comphy_map *serdes_map, int count)
return 0;
}
+#define SW_SMI_CMD_R(d, r) (0x9800 | (((d) & 0x1f) << 5) | ((r) & 0x1f))
+#define SW_SMI_CMD_W(d, r) (0x9400 | (((d) & 0x1f) << 5) | ((r) & 0x1f))
+
+static int sw_multi_read(struct mii_dev *bus, int sw, int dev, int reg)
+{
+ bus->write(bus, sw, 0, 0, SW_SMI_CMD_R(dev, reg));
+ mdelay(5);
+ return bus->read(bus, sw, 0, 1);
+}
+
+static void sw_multi_write(struct mii_dev *bus, int sw, int dev, int reg,
+ u16 val)
+{
+ bus->write(bus, sw, 0, 1, val);
+ bus->write(bus, sw, 0, 0, SW_SMI_CMD_W(dev, reg));
+ mdelay(5);
+}
+
+static int sw_scratch_read(struct mii_dev *bus, int sw, int reg)
+{
+ sw_multi_write(bus, sw, 0x1c, 0x1a, (reg & 0x7f) << 8);
+ return sw_multi_read(bus, sw, 0x1c, 0x1a) & 0xff;
+}
+
+static void sw_led_write(struct mii_dev *bus, int sw, int port, int reg,
+ u16 val)
+{
+ sw_multi_write(bus, sw, port, 0x16, 0x8000 | ((reg & 7) << 12)
+ | (val & 0x7ff));
+}
+
+static void sw_blink_leds(struct mii_dev *bus, int peridot, int topaz)
+{
+ int i, p;
+ struct {
+ int port;
+ u16 val;
+ int wait;
+ } regs[] = {
+ { 2, 0xef, 1 }, { 2, 0xfe, 1 }, { 2, 0x33, 0 },
+ { 4, 0xef, 1 }, { 4, 0xfe, 1 }, { 4, 0x33, 0 },
+ { 3, 0xfe, 1 }, { 3, 0xef, 1 }, { 3, 0x33, 0 },
+ { 1, 0xfe, 1 }, { 1, 0xef, 1 }, { 1, 0x33, 0 }
+ };
+
+ for (i = 0; i < 12; ++i) {
+ for (p = 0; p < peridot; ++p) {
+ sw_led_write(bus, 0x10 + p, regs[i].port, 0,
+ regs[i].val);
+ sw_led_write(bus, 0x10 + p, regs[i].port + 4, 0,
+ regs[i].val);
+ }
+ if (topaz) {
+ sw_led_write(bus, 0x2, 0x10 + regs[i].port, 0,
+ regs[i].val);
+ }
+
+ if (regs[i].wait)
+ mdelay(75);
+ }
+}
+
+static void check_switch_address(struct mii_dev *bus, int addr)
+{
+ if (sw_scratch_read(bus, addr, 0x70) >> 3 != addr)
+ printf("Check of switch MDIO address failed for 0x%02x\n",
+ addr);
+}
+
+static int sfp, pci, topaz, peridot, usb, passpci;
+static int sfp_pos, peridot_pos[3];
+static int module_count;
+
+static int configure_peridots(struct gpio_desc *reset_gpio)
+{
+ int i, ret;
+ u8 dout[MAX_MOX_MODULES];
+
+ memset(dout, 0, MAX_MOX_MODULES);
+
+ /* set addresses of Peridot modules */
+ for (i = 0; i < peridot; ++i)
+ dout[module_count - peridot_pos[i]] = (~i) & 3;
+
+ /*
+ * if there is a SFP module connected to the last Peridot module, set
+ * the P10_SMODE to 1 for the Peridot module
+ */
+ if (sfp)
+ dout[module_count - peridot_pos[i - 1]] |= 1 << 3;
+
+ dm_gpio_set_value(reset_gpio, 1);
+ mdelay(10);
+
+ ret = mox_do_spi(NULL, dout, module_count + 1);
+
+ mdelay(10);
+ dm_gpio_set_value(reset_gpio, 0);
+
+ mdelay(50);
+
+ return ret;
+}
+
+static int get_reset_gpio(struct gpio_desc *reset_gpio)
+{
+ int node;
+
+ node = fdt_node_offset_by_compatible(gd->fdt_blob, 0, "cznic,moxtet");
+ if (node < 0) {
+ printf("Cannot find Moxtet bus device node!\n");
+ return -1;
+ }
+
+ gpio_request_by_name_nodev(offset_to_ofnode(node), "reset-gpios", 0,
+ reset_gpio, GPIOD_IS_OUT);
+
+ if (!dm_gpio_is_valid(reset_gpio)) {
+ printf("Cannot find reset GPIO for Moxtet bus!\n");
+ return -1;
+ }
+
+ return 0;
+}
+
int last_stage_init(void)
{
int ret, i;
const u8 *topology;
- int module_count, is_sd;
+ int is_sd;
+ struct mii_dev *bus;
+ struct gpio_desc reset_gpio = {};
ret = mox_get_topology(&topology, &module_count, &is_sd);
if (ret) {
@@ -278,6 +407,109 @@ int last_stage_init(void)
}
}
+ /* now check if modules are connected in supported mode */
+
+ for (i = 0; i < module_count; ++i) {
+ switch (topology[i]) {
+ case MOX_MODULE_SFP:
+ if (sfp) {
+ printf("Error: Only one SFP module is supported!\n");
+ } else if (topaz) {
+ printf("Error: SFP module cannot be connected after Topaz Switch module!\n");
+ } else {
+ sfp_pos = i;
+ ++sfp;
+ }
+ break;
+ case MOX_MODULE_PCI:
+ if (pci) {
+ printf("Error: Only one Mini-PCIe module is supported!\n");
+ } else if (usb) {
+ printf("Error: Mini-PCIe module cannot come after USB 3.0 module!\n");
+ } else if (i && (i != 1 || !passpci)) {
+ printf("Error: Mini-PCIe module should be the first connected module or come right after Passthrough Mini-PCIe module!\n");
+ } else {
+ ++pci;
+ }
+ break;
+ case MOX_MODULE_TOPAZ:
+ if (topaz) {
+ printf("Error: Only one Topaz module is supported!\n");
+ } else if (peridot >= 3) {
+ printf("Error: At most two Peridot modules can come before Topaz module!\n");
+ } else {
+ ++topaz;
+ }
+ break;
+ case MOX_MODULE_PERIDOT:
+ if (sfp || topaz) {
+ printf("Error: Peridot module must come before SFP or Topaz module!\n");
+ } else if (peridot >= 3) {
+ printf("Error: At most three Peridot modules are supported!\n");
+ } else {
+ peridot_pos[peridot] = i;
+ ++peridot;
+ }
+ break;
+ case MOX_MODULE_USB3:
+ if (pci) {
+ printf("Error: USB 3.0 module cannot come after Mini-PCIe module!\n");
+ } else if (usb) {
+ printf("Error: Only one USB 3.0 module is supported!\n");
+ } else if (i && (i != 1 || !passpci)) {
+ printf("Error: USB 3.0 module should be the first connected module or come right after Passthrough Mini-PCIe module!\n");
+ } else {
+ ++usb;
+ }
+ break;
+ case MOX_MODULE_PASSPCI:
+ if (passpci) {
+ printf("Error: Only one Passthrough Mini-PCIe module is supported!\n");
+ } else if (i != 0) {
+ printf("Error: Passthrough Mini-PCIe module should be the first connected module!\n");
+ } else {
+ ++passpci;
+ }
+ }
+ }
+
+ /* now configure modules */
+
+ if (get_reset_gpio(&reset_gpio) < 0)
+ return 0;
+
+ if (peridot > 0) {
+ if (configure_peridots(&reset_gpio) < 0) {
+ printf("Cannot configure Peridot modules!\n");
+ peridot = 0;
+ }
+ } else {
+ dm_gpio_set_value(&reset_gpio, 1);
+ mdelay(50);
+ dm_gpio_set_value(&reset_gpio, 0);
+ mdelay(50);
+ }
+
+ if (peridot || topaz) {
+ /*
+ * now check if the addresses are set by reading Scratch & Misc
+ * register 0x70 of Peridot (and potentially Topaz) modules
+ */
+
+ bus = miiphy_get_dev_by_name("neta at 30000");
+ if (!bus) {
+ printf("Cannot get MDIO bus device!\n");
+ } else {
+ for (i = 0; i < peridot; ++i)
+ check_switch_address(bus, 0x10 + i);
+
+ if (topaz)
+ check_switch_address(bus, 0x2);
+
+ sw_blink_leds(bus, peridot, topaz);
+ }
+ }
+
printf("\n");
return 0;
--
2.18.1
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