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https://github.com/AsahiLinux/u-boot
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0d7d383098
Because of the way USB pad settings are handled it doesn't make sense to
be able to build the Efika MX board support without CONFIG_CMD_USB turned
on. So, we change the build to always compile in USB support.
We do not need to check for CONFIG_CMD_USB like we do with CONFIG_MXC_SPI
since the USB subsystem will error out of the compile for us.
Additionally, the following behaviors have changed;
* Smartbook "preboot" should not set input and output to USB keyboard as
there is no display support
* board_eth_init is implemented such that it does not cause U-Boot to
report an explicit failure ("CPU Net Initialization Failed").
Since Ethernet is implemented via USB (fixed on Smarttop, pluggable on
Smartbook, and handled by "usb start") - the warning that is left
("No ethernet found") is perfectly reasonable at the point it is printed
since the USB system hasn't been started and nothing has been probed yet.
Signed-off-by: Matt Sealey <matt@genesi-usa.com>
Cc: Stefano Babic <sbabic@denx.de>
Cc: Marek Vasut <marex@denx.de>
228 lines
6 KiB
C
228 lines
6 KiB
C
/*
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* Copyright (C) 2010 Marek Vasut <marek.vasut@gmail.com>
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*
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* (C) Copyright 2009 Freescale Semiconductor, Inc.
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*
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* See file CREDITS for list of people who contributed to this
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* project.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation; either version 2 of
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* the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
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* MA 02111-1307 USA
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*/
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#include <common.h>
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#include <usb.h>
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#include <asm/io.h>
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#include <asm/arch/imx-regs.h>
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#include <asm/arch/mx5x_pins.h>
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#include <asm/arch/iomux.h>
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#include <asm/gpio.h>
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#include <usb/ehci-fsl.h>
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#include <usb/ulpi.h>
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#include <errno.h>
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#include "../../../drivers/usb/host/ehci.h"
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/* USB pin configuration */
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#define USB_PAD_CONFIG (PAD_CTL_PKE_ENABLE | PAD_CTL_SRE_FAST | \
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PAD_CTL_DRV_HIGH | PAD_CTL_100K_PU | \
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PAD_CTL_HYS_ENABLE | PAD_CTL_PUE_PULL)
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/*
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* Configure the USB H1 and USB H2 IOMUX
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*/
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void setup_iomux_usb(void)
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{
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setup_iomux_usb_h1();
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if (machine_is_efikasb())
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setup_iomux_usb_h2();
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/* USB PHY reset */
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mxc_request_iomux(MX51_PIN_EIM_D27, IOMUX_CONFIG_ALT1);
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mxc_iomux_set_pad(MX51_PIN_EIM_D27, PAD_CTL_PKE_ENABLE |
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PAD_CTL_SRE_FAST | PAD_CTL_DRV_HIGH);
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/* USB HUB reset */
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mxc_request_iomux(MX51_PIN_GPIO1_5, IOMUX_CONFIG_ALT0);
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mxc_iomux_set_pad(MX51_PIN_GPIO1_5, PAD_CTL_PKE_ENABLE |
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PAD_CTL_SRE_FAST | PAD_CTL_DRV_HIGH);
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/* WIFI EN (act low) */
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mxc_request_iomux(MX51_PIN_EIM_A22, IOMUX_CONFIG_GPIO);
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mxc_iomux_set_pad(MX51_PIN_EIM_A22, 0);
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/* WIFI RESET */
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mxc_request_iomux(MX51_PIN_EIM_A16, IOMUX_CONFIG_GPIO);
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mxc_iomux_set_pad(MX51_PIN_EIM_A16, 0);
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/* BT EN (act low) */
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mxc_request_iomux(MX51_PIN_EIM_A17, IOMUX_CONFIG_GPIO);
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mxc_iomux_set_pad(MX51_PIN_EIM_A17, 0);
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}
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/*
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* Enable devices connected to USB BUSes
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*/
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static void efika_usb_enable_devices(void)
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{
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/* Enable Bluetooth */
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gpio_direction_output(IOMUX_TO_GPIO(MX51_PIN_EIM_A17), 0);
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udelay(10000);
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gpio_set_value(IOMUX_TO_GPIO(MX51_PIN_EIM_A17), 1);
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/* Enable WiFi */
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gpio_direction_output(IOMUX_TO_GPIO(MX51_PIN_EIM_A22), 1);
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udelay(10000);
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/* Reset the WiFi chip */
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gpio_direction_output(IOMUX_TO_GPIO(MX51_PIN_EIM_A16), 0);
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udelay(10000);
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gpio_set_value(IOMUX_TO_GPIO(MX51_PIN_EIM_A16), 1);
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}
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/*
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* Reset USB HUB (or HUBs on EfikaSB)
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*/
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static void efika_usb_hub_reset(void)
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{
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/* HUB reset */
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gpio_direction_output(IOMUX_TO_GPIO(MX51_PIN_GPIO1_5), 1);
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udelay(1000);
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gpio_set_value(IOMUX_TO_GPIO(MX51_PIN_GPIO1_5), 0);
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udelay(1000);
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gpio_set_value(IOMUX_TO_GPIO(MX51_PIN_GPIO1_5), 1);
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}
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/*
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* Reset USB PHY (or PHYs on EfikaSB)
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*/
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static void efika_usb_phy_reset(void)
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{
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/* SMSC 3317 PHY reset */
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gpio_direction_output(IOMUX_TO_GPIO(MX51_PIN_EIM_D27), 0);
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udelay(1000);
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gpio_set_value(IOMUX_TO_GPIO(MX51_PIN_EIM_D27), 1);
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}
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static void efika_ehci_init(struct usb_ehci *ehci, uint32_t stp_gpio,
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uint32_t alt0, uint32_t alt1)
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{
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int ret;
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struct ulpi_regs *ulpi = (struct ulpi_regs *)0;
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struct ulpi_viewport ulpi_vp;
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mxc_request_iomux(stp_gpio, alt0);
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mxc_iomux_set_pad(stp_gpio, PAD_CTL_DRV_HIGH |
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PAD_CTL_PKE_ENABLE | PAD_CTL_SRE_FAST);
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gpio_direction_output(IOMUX_TO_GPIO(stp_gpio), 0);
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udelay(1000);
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gpio_set_value(IOMUX_TO_GPIO(stp_gpio), 1);
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udelay(1000);
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mxc_request_iomux(stp_gpio, alt1);
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mxc_iomux_set_pad(stp_gpio, USB_PAD_CONFIG);
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udelay(10000);
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ulpi_vp.viewport_addr = (u32)&ehci->ulpi_viewpoint;
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ulpi_vp.port_num = 0;
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ret = ulpi_init(&ulpi_vp);
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if (ret) {
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printf("Efika USB ULPI initialization failed\n");
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return;
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}
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/* ULPI set flags */
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ulpi_write(&ulpi_vp, &ulpi->otg_ctrl,
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ULPI_OTG_DP_PULLDOWN | ULPI_OTG_DM_PULLDOWN |
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ULPI_OTG_EXTVBUSIND);
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ulpi_write(&ulpi_vp, &ulpi->function_ctrl,
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ULPI_FC_FULL_SPEED | ULPI_FC_OPMODE_NORMAL |
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ULPI_FC_SUSPENDM);
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ulpi_write(&ulpi_vp, &ulpi->iface_ctrl, 0);
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/* Set VBus */
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ulpi_write(&ulpi_vp, &ulpi->otg_ctrl_set,
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ULPI_OTG_DRVVBUS | ULPI_OTG_DRVVBUS_EXT);
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/*
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* Set VBusChrg
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*
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* NOTE: This violates USB specification, but otherwise, USB on Efika
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* doesn't work.
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*/
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ulpi_write(&ulpi_vp, &ulpi->otg_ctrl_set, ULPI_OTG_CHRGVBUS);
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}
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int board_ehci_hcd_init(int port)
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{
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/* Init iMX51 EHCI */
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efika_usb_phy_reset();
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efika_usb_hub_reset();
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efika_usb_enable_devices();
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return 0;
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}
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void ehci_powerup_fixup(uint32_t *status_reg, uint32_t *reg)
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{
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uint32_t port = OTG_BASE_ADDR + (0x200 * CONFIG_MXC_USB_PORT);
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struct usb_ehci *ehci = (struct usb_ehci *)port;
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struct ulpi_regs *ulpi = (struct ulpi_regs *)0;
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struct ulpi_viewport ulpi_vp;
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ulpi_vp.viewport_addr = (u32)&ehci->ulpi_viewpoint;
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ulpi_vp.port_num = 0;
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ulpi_write(&ulpi_vp, &ulpi->otg_ctrl_set, ULPI_OTG_CHRGVBUS);
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mdelay(50);
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/* terminate the reset */
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*reg = ehci_readl(status_reg);
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*reg |= EHCI_PS_PE;
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}
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void board_ehci_hcd_postinit(struct usb_ehci *ehci, int port)
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{
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uint32_t tmp;
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if (port == 0) {
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/* Adjust UTMI PHY frequency to 24MHz */
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tmp = readl(OTG_BASE_ADDR + 0x80c);
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tmp = (tmp & ~0x3) | 0x01;
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writel(tmp, OTG_BASE_ADDR + 0x80c);
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} else if (port == 1) {
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efika_ehci_init(ehci, MX51_PIN_USBH1_STP,
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IOMUX_CONFIG_ALT2, IOMUX_CONFIG_ALT0);
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} else if ((port == 2) && machine_is_efikasb()) {
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efika_ehci_init(ehci, MX51_PIN_EIM_A26,
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IOMUX_CONFIG_ALT1, IOMUX_CONFIG_ALT2);
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}
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if (port)
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mdelay(10);
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}
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/*
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* Ethernet on the Smarttop is on the USB bus. Rather than give an error about
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* "CPU Net Initialization Failed", just pass this test since no other settings
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* are required. Smartbook doesn't have built-in Ethernet but we will let it
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* pass anyway considering someone may have plugged in a USB stick and all
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* they need to do is run "usb start".
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*/
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int board_eth_init(bd_t *bis)
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{
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return 0;
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}
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