board: turris_mox: Fixup U-Boot's device tree if PCIe connected

If PCIe Mox module is connected we want to have PCIe node enabled
in U-Boot's device tree.

Signed-off-by: Marek Behun <marek.behun@nic.cz>
Signed-off-by: Stefan Roese <sr@denx.de>
This commit is contained in:
Marek Behún 2018-08-21 12:22:09 +02:00 committed by Stefan Roese
parent f26e379b31
commit 863949e383
3 changed files with 90 additions and 0 deletions

View File

@ -126,3 +126,10 @@
vbus-supply = <&reg_usb3_vbus>;
status = "okay";
};
&pcie0 {
pinctrl-names = "default";
pinctrl-0 = <&pcie_pins>;
reset-gpio = <&gpiosb 3 GPIO_ACTIVE_HIGH>;
status = "disabled";
};

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@ -4,17 +4,99 @@
*/
#include <common.h>
#include <asm/io.h>
#include <dm.h>
#include <clk.h>
#include <spi.h>
#include <linux/string.h>
#include <linux/libfdt.h>
#include <fdt_support.h>
#ifdef CONFIG_WDT_ARMADA_37XX
#include <wdt.h>
#endif
#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;
#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;

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@ -13,6 +13,7 @@ CONFIG_SYS_CONSOLE_INFO_QUIET=y
# CONFIG_DISPLAY_CPUINFO is not set
# CONFIG_DISPLAY_BOARDINFO is not set
CONFIG_ARCH_EARLY_INIT_R=y
CONFIG_OF_BOARD_FIXUP=y
CONFIG_CMD_CLK=y
# CONFIG_CMD_FLASH is not set
CONFIG_CMD_I2C=y