arm: mvebu: turris_mox: Check and configure modules

Check if Mox modules are connected in supported mode, then configure
the MDIO addresses of switch modules.

Signed-off-by: Marek Behún <marek.behun@nic.cz>
Signed-off-by: Stefan Roese <sr@denx.de>

diff --git a/arch/arm/dts/armada-3720-turris-mox.dts b/arch/arm/dts/armada-3720-turris-mox.dts
index 7babc16..ff54ce5 100644 (file)
--- 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@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 3c0ab58..4426ee3 100644 (file)
--- 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@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;