u-boot/board/CZ.NIC/turris_mox/turris_mox.c
Stefan Roese ccd063e981 watchdog: Move watchdog_dev to data section (BSS may not be cleared)
This patch moves all instances of static "watchdog_dev" declarations to
the "data" section. This may be needed, as the BSS may not be cleared
in the early U-Boot phase, where watchdog_reset() is already beeing
called. This may result in incorrect pointer access, as the check to
"!watchdog_dev" in watchdog_reset() may not be true and the function
may continue to run.

Signed-off-by: Stefan Roese <sr@denx.de>
Cc: Heiko Schocher <hs@denx.de>
Cc: Tom Rini <trini@konsulko.com>
Cc: Michal Simek <michal.simek@xilinx.com>
Cc: "Marek Behún" <marek.behun@nic.cz>
Cc: Daniel Schwierzeck <daniel.schwierzeck@gmail.com>
Tested-by: Michal Simek <michal.simek@xilinx.com> (on zcu100)
Reviewed-by: Michal Simek <michal.simek@xilinx.com>
2019-04-08 09:21:39 -04:00

583 lines
13 KiB
C

// SPDX-License-Identifier: GPL-2.0+
/*
* Copyright (C) 2018 Marek Behun <marek.behun@nic.cz>
*/
#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>
#include <environment.h>
#ifdef CONFIG_WDT_ARMADA_37XX
#include <wdt.h>
#endif
#include "mox_sp.h"
#define MAX_MOX_MODULES 10
#define MOX_MODULE_SFP 0x1
#define MOX_MODULE_PCI 0x2
#define MOX_MODULE_TOPAZ 0x3
#define MOX_MODULE_PERIDOT 0x4
#define MOX_MODULE_USB3 0x5
#define MOX_MODULE_PASSPCI 0x6
#define ARMADA_37XX_NB_GPIO_SEL 0xd0013830
#define ARMADA_37XX_SPI_CTRL 0xd0010600
#define ARMADA_37XX_SPI_CFG 0xd0010604
#define ARMADA_37XX_SPI_DOUT 0xd0010608
#define ARMADA_37XX_SPI_DIN 0xd001060c
#define PCIE_PATH "/soc/pcie@d0070000"
DECLARE_GLOBAL_DATA_PTR;
int dram_init(void)
{
gd->ram_base = 0;
gd->ram_size = (phys_size_t)get_ram_size(0, 0x40000000);
return 0;
}
int dram_init_banksize(void)
{
gd->bd->bi_dram[0].start = (phys_addr_t)0;
gd->bd->bi_dram[0].size = gd->ram_size;
return 0;
}
#if defined(CONFIG_OF_BOARD_FIXUP)
int board_fix_fdt(void *blob)
{
u8 topology[MAX_MOX_MODULES];
int i, size, node;
bool enable;
/*
* SPI driver is not loaded in driver model yet, but we have to find out
* if pcie should be enabled in U-Boot's device tree. Therefore we have
* to read SPI by reading/writing SPI registers directly
*/
writel(0x563fa, ARMADA_37XX_NB_GPIO_SEL);
writel(0x10df, ARMADA_37XX_SPI_CFG);
writel(0x2005b, ARMADA_37XX_SPI_CTRL);
while (!(readl(ARMADA_37XX_SPI_CTRL) & 0x2))
udelay(1);
for (i = 0; i < MAX_MOX_MODULES; ++i) {
writel(0x0, ARMADA_37XX_SPI_DOUT);
while (!(readl(ARMADA_37XX_SPI_CTRL) & 0x2))
udelay(1);
topology[i] = readl(ARMADA_37XX_SPI_DIN) & 0xff;
if (topology[i] == 0xff)
break;
topology[i] &= 0xf;
}
size = i;
writel(0x5b, ARMADA_37XX_SPI_CTRL);
if (size > 1 && (topology[1] == MOX_MODULE_PCI ||
topology[1] == MOX_MODULE_USB3 ||
topology[1] == MOX_MODULE_PASSPCI))
enable = true;
else
enable = false;
node = fdt_path_offset(blob, PCIE_PATH);
if (node < 0) {
printf("Cannot find PCIe node in U-Boot's device tree!\n");
return 0;
}
if (fdt_setprop_string(blob, node, "status",
enable ? "okay" : "disabled") < 0) {
printf("Cannot %s PCIe in U-Boot's device tree!\n",
enable ? "enable" : "disable");
return 0;
}
return 0;
}
#endif
#ifdef CONFIG_WDT_ARMADA_37XX
static struct udevice *watchdog_dev __attribute__((section(".data"))) = NULL;
void watchdog_reset(void)
{
static ulong next_reset;
ulong now;
if (!watchdog_dev)
return;
now = timer_get_us();
/* Do not reset the watchdog too often */
if (now > next_reset) {
wdt_reset(watchdog_dev);
next_reset = now + 100000;
}
}
#endif
int board_init(void)
{
/* address of boot parameters */
gd->bd->bi_boot_params = CONFIG_SYS_SDRAM_BASE + 0x100;
#ifdef CONFIG_WDT_ARMADA_37XX
if (uclass_get_device(UCLASS_WDT, 0, &watchdog_dev)) {
printf("Cannot find Armada 3720 watchdog!\n");
} else {
printf("Enabling Armada 3720 watchdog (3 minutes timeout).\n");
wdt_start(watchdog_dev, 180000, 0);
}
#endif
return 0;
}
static int mox_do_spi(u8 *in, u8 *out, size_t size)
{
struct spi_slave *slave;
struct udevice *dev;
int ret;
ret = spi_get_bus_and_cs(0, 1, 1000000, SPI_CPHA | SPI_CPOL,
"spi_generic_drv", "moxtet@1", &dev,
&slave);
if (ret)
goto fail;
ret = spi_claim_bus(slave);
if (ret)
goto fail_free;
ret = spi_xfer(slave, size * 8, out, in, SPI_XFER_ONCE);
spi_release_bus(slave);
fail_free:
spi_free_slave(slave);
fail:
return ret;
}
static int mox_get_topology(const u8 **ptopology, int *psize, int *pis_sd)
{
static int is_sd;
static u8 topology[MAX_MOX_MODULES - 1];
static int size;
u8 din[MAX_MOX_MODULES], dout[MAX_MOX_MODULES];
int ret, i;
if (size) {
if (ptopology)
*ptopology = topology;
if (psize)
*psize = size;
if (pis_sd)
*pis_sd = is_sd;
return 0;
}
memset(din, 0, MAX_MOX_MODULES);
memset(dout, 0, MAX_MOX_MODULES);
ret = mox_do_spi(din, dout, MAX_MOX_MODULES);
if (ret)
return ret;
if (din[0] == 0x10)
is_sd = 1;
else if (din[0] == 0x00)
is_sd = 0;
else
return -ENODEV;
for (i = 1; i < MAX_MOX_MODULES && din[i] != 0xff; ++i)
topology[i - 1] = din[i] & 0xf;
size = i - 1;
if (ptopology)
*ptopology = topology;
if (psize)
*psize = size;
if (pis_sd)
*pis_sd = is_sd;
return 0;
}
int comphy_update_map(struct comphy_map *serdes_map, int count)
{
int ret, i, size, sfpindex = -1, swindex = -1;
const u8 *topology;
ret = mox_get_topology(&topology, &size, NULL);
if (ret)
return ret;
for (i = 0; i < size; ++i) {
if (topology[i] == MOX_MODULE_SFP && sfpindex == -1)
sfpindex = i;
else if ((topology[i] == MOX_MODULE_TOPAZ ||
topology[i] == MOX_MODULE_PERIDOT) &&
swindex == -1)
swindex = i;
}
if (sfpindex >= 0 && swindex >= 0) {
if (sfpindex < swindex)
serdes_map[0].speed = PHY_SPEED_1_25G;
else
serdes_map[0].speed = PHY_SPEED_3_125G;
} else if (sfpindex >= 0) {
serdes_map[0].speed = PHY_SPEED_1_25G;
} else if (swindex >= 0) {
serdes_map[0].speed = PHY_SPEED_3_125G;
}
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 misc_init_r(void)
{
int ret;
u8 mac1[6], mac2[6];
ret = mbox_sp_get_board_info(NULL, mac1, mac2, NULL, NULL);
if (ret < 0) {
printf("Cannot read data from OTP!\n");
return 0;
}
if (is_valid_ethaddr(mac1) && !env_get("ethaddr"))
eth_env_set_enetaddr("ethaddr", mac1);
if (is_valid_ethaddr(mac2) && !env_get("eth1addr"))
eth_env_set_enetaddr("eth1addr", mac2);
return 0;
}
static void mox_print_info(void)
{
int ret, board_version, ram_size;
u64 serial_number;
const char *pub_key;
ret = mbox_sp_get_board_info(&serial_number, NULL, NULL, &board_version,
&ram_size);
if (ret < 0)
return;
printf("Turris Mox:\n");
printf(" Board version: %i\n", board_version);
printf(" RAM size: %i MiB\n", ram_size);
printf(" Serial Number: %016llX\n", serial_number);
pub_key = mox_sp_get_ecdsa_public_key();
if (pub_key)
printf(" ECDSA Public Key: %s\n", pub_key);
else
printf("Cannot read ECDSA Public Key\n");
}
int last_stage_init(void)
{
int ret, i;
const u8 *topology;
int is_sd;
struct mii_dev *bus;
struct gpio_desc reset_gpio = {};
mox_print_info();
ret = mox_get_topology(&topology, &module_count, &is_sd);
if (ret) {
printf("Cannot read module topology!\n");
return 0;
}
printf(" SD/eMMC version: %s\n", is_sd ? "SD" : "eMMC");
if (module_count)
printf("Module Topology:\n");
for (i = 0; i < module_count; ++i) {
switch (topology[i]) {
case MOX_MODULE_SFP:
printf("% 4i: SFP Module\n", i + 1);
break;
case MOX_MODULE_PCI:
printf("% 4i: Mini-PCIe Module\n", i + 1);
break;
case MOX_MODULE_TOPAZ:
printf("% 4i: Topaz Switch Module (4-port)\n", i + 1);
break;
case MOX_MODULE_PERIDOT:
printf("% 4i: Peridot Switch Module (8-port)\n", i + 1);
break;
case MOX_MODULE_USB3:
printf("% 4i: USB 3.0 Module (4 ports)\n", i + 1);
break;
case MOX_MODULE_PASSPCI:
printf("% 4i: Passthrough Mini-PCIe Module\n", i + 1);
break;
default:
printf("% 4i: unknown (ID %i)\n", i + 1, topology[i]);
}
}
/* 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;
}