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https://github.com/AsahiLinux/u-boot
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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>
This commit is contained in:
Marek Behún
Stefan Roese
parent
9433cd1109
commit
7dd7c2e796
2 changed files with 244 additions and 1 deletions
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@ -110,6 +110,17 @@
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spi-max-frequency = <20000000>;
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m25p,fast-read;
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};
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moxtet@1 {
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#address-cells = <1>;
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#size-cells = <0>;
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compatible = "cznic,moxtet";
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reg = <1>;
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reset-gpios = <&gpiosb 2 GPIO_ACTIVE_LOW>;
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spi-max-frequency = <1000000>;
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spi-cpol;
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spi-cpha;
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};
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};
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&uart0 {
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@ -4,11 +4,13 @@
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*/
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#include <common.h>
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#include <asm/gpio.h>
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#include <asm/io.h>
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#include <dm.h>
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#include <clk.h>
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#include <spi.h>
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#include <mvebu/comphy.h>
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#include <miiphy.h>
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#include <linux/string.h>
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#include <linux/libfdt.h>
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#include <fdt_support.h>
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@ -239,11 +241,138 @@ int comphy_update_map(struct comphy_map *serdes_map, int count)
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return 0;
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}
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#define SW_SMI_CMD_R(d, r) (0x9800 | (((d) & 0x1f) << 5) | ((r) & 0x1f))
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#define SW_SMI_CMD_W(d, r) (0x9400 | (((d) & 0x1f) << 5) | ((r) & 0x1f))
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static int sw_multi_read(struct mii_dev *bus, int sw, int dev, int reg)
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{
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bus->write(bus, sw, 0, 0, SW_SMI_CMD_R(dev, reg));
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mdelay(5);
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return bus->read(bus, sw, 0, 1);
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}
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static void sw_multi_write(struct mii_dev *bus, int sw, int dev, int reg,
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u16 val)
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{
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bus->write(bus, sw, 0, 1, val);
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bus->write(bus, sw, 0, 0, SW_SMI_CMD_W(dev, reg));
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mdelay(5);
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}
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static int sw_scratch_read(struct mii_dev *bus, int sw, int reg)
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{
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sw_multi_write(bus, sw, 0x1c, 0x1a, (reg & 0x7f) << 8);
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return sw_multi_read(bus, sw, 0x1c, 0x1a) & 0xff;
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}
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static void sw_led_write(struct mii_dev *bus, int sw, int port, int reg,
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u16 val)
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{
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sw_multi_write(bus, sw, port, 0x16, 0x8000 | ((reg & 7) << 12)
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| (val & 0x7ff));
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}
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static void sw_blink_leds(struct mii_dev *bus, int peridot, int topaz)
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{
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int i, p;
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struct {
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int port;
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u16 val;
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int wait;
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} regs[] = {
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{ 2, 0xef, 1 }, { 2, 0xfe, 1 }, { 2, 0x33, 0 },
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{ 4, 0xef, 1 }, { 4, 0xfe, 1 }, { 4, 0x33, 0 },
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{ 3, 0xfe, 1 }, { 3, 0xef, 1 }, { 3, 0x33, 0 },
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{ 1, 0xfe, 1 }, { 1, 0xef, 1 }, { 1, 0x33, 0 }
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};
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for (i = 0; i < 12; ++i) {
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for (p = 0; p < peridot; ++p) {
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sw_led_write(bus, 0x10 + p, regs[i].port, 0,
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regs[i].val);
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sw_led_write(bus, 0x10 + p, regs[i].port + 4, 0,
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regs[i].val);
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}
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if (topaz) {
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sw_led_write(bus, 0x2, 0x10 + regs[i].port, 0,
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regs[i].val);
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}
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if (regs[i].wait)
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mdelay(75);
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}
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}
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static void check_switch_address(struct mii_dev *bus, int addr)
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{
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if (sw_scratch_read(bus, addr, 0x70) >> 3 != addr)
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printf("Check of switch MDIO address failed for 0x%02x\n",
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addr);
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}
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static int sfp, pci, topaz, peridot, usb, passpci;
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static int sfp_pos, peridot_pos[3];
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static int module_count;
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static int configure_peridots(struct gpio_desc *reset_gpio)
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{
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int i, ret;
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u8 dout[MAX_MOX_MODULES];
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memset(dout, 0, MAX_MOX_MODULES);
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/* set addresses of Peridot modules */
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for (i = 0; i < peridot; ++i)
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dout[module_count - peridot_pos[i]] = (~i) & 3;
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/*
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* if there is a SFP module connected to the last Peridot module, set
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* the P10_SMODE to 1 for the Peridot module
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*/
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if (sfp)
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dout[module_count - peridot_pos[i - 1]] |= 1 << 3;
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dm_gpio_set_value(reset_gpio, 1);
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mdelay(10);
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ret = mox_do_spi(NULL, dout, module_count + 1);
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mdelay(10);
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dm_gpio_set_value(reset_gpio, 0);
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mdelay(50);
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return ret;
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}
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static int get_reset_gpio(struct gpio_desc *reset_gpio)
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{
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int node;
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node = fdt_node_offset_by_compatible(gd->fdt_blob, 0, "cznic,moxtet");
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if (node < 0) {
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printf("Cannot find Moxtet bus device node!\n");
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return -1;
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}
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gpio_request_by_name_nodev(offset_to_ofnode(node), "reset-gpios", 0,
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reset_gpio, GPIOD_IS_OUT);
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if (!dm_gpio_is_valid(reset_gpio)) {
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printf("Cannot find reset GPIO for Moxtet bus!\n");
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return -1;
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}
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return 0;
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}
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int last_stage_init(void)
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{
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int ret, i;
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const u8 *topology;
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int module_count, is_sd;
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int is_sd;
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struct mii_dev *bus;
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struct gpio_desc reset_gpio = {};
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ret = mox_get_topology(&topology, &module_count, &is_sd);
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if (ret) {
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@ -278,6 +407,109 @@ int last_stage_init(void)
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}
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}
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/* now check if modules are connected in supported mode */
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for (i = 0; i < module_count; ++i) {
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switch (topology[i]) {
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case MOX_MODULE_SFP:
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if (sfp) {
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printf("Error: Only one SFP module is supported!\n");
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} else if (topaz) {
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printf("Error: SFP module cannot be connected after Topaz Switch module!\n");
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} else {
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sfp_pos = i;
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++sfp;
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}
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break;
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case MOX_MODULE_PCI:
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if (pci) {
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printf("Error: Only one Mini-PCIe module is supported!\n");
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} else if (usb) {
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printf("Error: Mini-PCIe module cannot come after USB 3.0 module!\n");
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} else if (i && (i != 1 || !passpci)) {
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printf("Error: Mini-PCIe module should be the first connected module or come right after Passthrough Mini-PCIe module!\n");
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} else {
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++pci;
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}
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break;
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case MOX_MODULE_TOPAZ:
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if (topaz) {
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printf("Error: Only one Topaz module is supported!\n");
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} else if (peridot >= 3) {
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printf("Error: At most two Peridot modules can come before Topaz module!\n");
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} else {
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++topaz;
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}
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break;
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case MOX_MODULE_PERIDOT:
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if (sfp || topaz) {
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printf("Error: Peridot module must come before SFP or Topaz module!\n");
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} else if (peridot >= 3) {
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printf("Error: At most three Peridot modules are supported!\n");
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} else {
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peridot_pos[peridot] = i;
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++peridot;
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}
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break;
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case MOX_MODULE_USB3:
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if (pci) {
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printf("Error: USB 3.0 module cannot come after Mini-PCIe module!\n");
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} else if (usb) {
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printf("Error: Only one USB 3.0 module is supported!\n");
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} else if (i && (i != 1 || !passpci)) {
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printf("Error: USB 3.0 module should be the first connected module or come right after Passthrough Mini-PCIe module!\n");
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} else {
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++usb;
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}
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break;
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case MOX_MODULE_PASSPCI:
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if (passpci) {
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printf("Error: Only one Passthrough Mini-PCIe module is supported!\n");
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} else if (i != 0) {
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printf("Error: Passthrough Mini-PCIe module should be the first connected module!\n");
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} else {
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++passpci;
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}
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}
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}
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/* now configure modules */
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if (get_reset_gpio(&reset_gpio) < 0)
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return 0;
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if (peridot > 0) {
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if (configure_peridots(&reset_gpio) < 0) {
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printf("Cannot configure Peridot modules!\n");
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peridot = 0;
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}
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} else {
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dm_gpio_set_value(&reset_gpio, 1);
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mdelay(50);
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dm_gpio_set_value(&reset_gpio, 0);
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mdelay(50);
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}
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if (peridot || topaz) {
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/*
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* now check if the addresses are set by reading Scratch & Misc
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* register 0x70 of Peridot (and potentially Topaz) modules
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*/
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bus = miiphy_get_dev_by_name("neta@30000");
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if (!bus) {
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printf("Cannot get MDIO bus device!\n");
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} else {
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for (i = 0; i < peridot; ++i)
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check_switch_address(bus, 0x10 + i);
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if (topaz)
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check_switch_address(bus, 0x2);
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sw_blink_leds(bus, peridot, topaz);
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}
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}
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printf("\n");
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return 0;
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