From: Marek Behún Date: Mon, 17 Dec 2018 15:10:03 +0000 (+0100) Subject: arm: mvebu: turris_mox: Check and configure modules X-Git-Tag: v2019.04-rc1~31^2~11 X-Git-Url: https://git.librecmc.org/?a=commitdiff_plain;h=7dd7c2e796ca6481c9341cf9df0328bdb5bd9fd8;p=oweals%2Fu-boot.git 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 Signed-off-by: Stefan Roese --- 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@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 +#include #include #include #include #include #include +#include #include #include #include @@ -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;