diff options
| author | Max Krummenacher <max.krummenacher@toradex.com> | 2021-03-31 17:19:23 +0200 |
|---|---|---|
| committer | Max Krummenacher <max.krummenacher@toradex.com> | 2021-04-01 12:19:55 +0200 |
| commit | b00879d2cccef63594f4b2c5cadebcbd311e7e97 (patch) | |
| tree | f6f8b72142a22aa80ab786dfc5b0929a732b9adf | |
| parent | 99b7735d300f0fae25382a298c945e87464e2967 (diff) | |
colibri-imx8x: hardcode the on module usb hub to bypass mode
The on module USB hub connects upstream to SoC USB_OTG2 and provides
two downstream ports, one to the on module Wi-Fi, one to the SODIMM
connector.
In bypass mode the upstream port is directly connected to the SODIMM
connector pins.
Related-to: ELB-3853
Signed-off-by: Max Krummenacher <max.krummenacher@toradex.com>
| -rw-r--r-- | board/toradex/colibri-imx8x/colibri-imx8x.c | 47 |
1 files changed, 46 insertions, 1 deletions
diff --git a/board/toradex/colibri-imx8x/colibri-imx8x.c b/board/toradex/colibri-imx8x/colibri-imx8x.c index 9098815424..5bc4fba5b9 100644 --- a/board/toradex/colibri-imx8x/colibri-imx8x.c +++ b/board/toradex/colibri-imx8x/colibri-imx8x.c @@ -1,6 +1,6 @@ // SPDX-License-Identifier: GPL-2.0+ /* - * Copyright 2018-2019 Toradex + * Copyright 2018-2021 Toradex */ #include <common.h> #include <cpu_func.h> @@ -20,6 +20,7 @@ #include <asm/arch/iomux.h> #include <asm/arch/sys_proto.h> +#include <i2c.h> #include <power-domain.h> #include <usb.h> @@ -125,8 +126,52 @@ int board_phy_config(struct phy_device *phydev) } #endif +#define I2C_ONMODULE_BUS 0 +#define I2C_GPIO_EXPANDER 0x43 +#define FXL6408_REG_IODIR 0x3 +#define FXL6408_REG_OUTPUT 0x5 +#define FXL6408_REG_OPENDR 0x7 +/* + * On-module GPIO expander FXL6408 drives management signals for + * on-module USB Hub. + */ +static void init_gpio_expander(void) +{ +#ifdef CONFIG_DM_I2C + struct udevice *dev; + int ret; + u8 temp; + + ret = i2c_get_chip_for_busnum(I2C_ONMODULE_BUS, I2C_GPIO_EXPANDER, + 1, &dev); + if (ret) { + printf("%s: Cannot find dev %d on I2C bus %d\n", __func__, + I2C_GPIO_EXPANDER, I2C_ONMODULE_BUS); + return; + } + + /* + * On-module USB3803 Hub has bypass mode. It connects + * directly its upstream PHY with its downstream PHY#3 port which then + * goes to the carrier board USBH port. + * Turn on the Bypass# and deassert the Reset# signals, + * i.e. BYPASS_N = 0, RESET_N = 1 + * Refer to + * https://www.onsemi.com/pdf/datasheet/fxl6408-d.pdf, Page 9 + */ + temp = 0x30; /* set GPIO 4 and 5 as output */ + dm_i2c_write(dev, 3, &temp, 1); + temp = 0xcf; /* take GPIO 4 and 5 out of tristate */ + dm_i2c_write(dev, 7, &temp, 1); + temp = 0x10; /* set GPIO 4=1 and GPIO5=0 */ + dm_i2c_write(dev, 5, &temp, 1); +#endif +} + int board_init(void) { + init_gpio_expander(); + gpio_request(USB_CDET_GPIO, "usb_cdet"); #ifdef CONFIG_SNVS_SEC_SC_AUTO |