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 2018-12-17 16:10:03 +01:00 committed by Stefan Roese
parent 9433cd1109
commit 7dd7c2e796
2 changed files with 244 additions and 1 deletions

View File

@ -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 {

View File

@ -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;