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MIPS: ath79: add common USB Host Controller device

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Add common platform_device and helper code to make the registration of
the built-in USB controllers easier on the board which are using them.
Also register the USB controller on the AP81 and PB44 boards.

Signed-off-by: Gabor Juhos <juhosg@openwrt.org>
Signed-off-by: Imre Kaloz <kaloz@openwrt.org>
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/2442/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
This commit is contained in:
Gabor Juhos 2011-06-05 23:38:46 +02:00 • committed by Ralf Baechle
parent d2b4ac1e5d
commit 7e98aa4639
7 changed files with 236 additions and 1 deletions
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178
arch/mips/ath79/dev-usb.c Normal file
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/*
* Atheros AR7XXX/AR9XXX USB Host Controller device
*
* Copyright (C) 2008-2011 Gabor Juhos <juhosg@openwrt.org>
* Copyright (C) 2008 Imre Kaloz <kaloz@openwrt.org>
*
* Parts of this file are based on Atheros' 2.6.15 BSP
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 as published
* by the Free Software Foundation.
*/
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/delay.h>
#include <linux/irq.h>
#include <linux/dma-mapping.h>
#include <linux/platform_device.h>
#include <asm/mach-ath79/ath79.h>
#include <asm/mach-ath79/ar71xx_regs.h>
#include "common.h"
#include "dev-usb.h"
static struct resource ath79_ohci_resources[] = {
[0] = {
/* .start and .end fields are filled dynamically */
.flags = IORESOURCE_MEM,
},
[1] = {
.start = ATH79_MISC_IRQ_OHCI,
.end = ATH79_MISC_IRQ_OHCI,
.flags = IORESOURCE_IRQ,
},
};
static u64 ath79_ohci_dmamask = DMA_BIT_MASK(32);
static struct platform_device ath79_ohci_device = {
.name = "ath79-ohci",
.id = -1,
.resource = ath79_ohci_resources,
.num_resources = ARRAY_SIZE(ath79_ohci_resources),
.dev = {
.dma_mask = &ath79_ohci_dmamask,
.coherent_dma_mask = DMA_BIT_MASK(32),
},
};
static struct resource ath79_ehci_resources[] = {
[0] = {
/* .start and .end fields are filled dynamically */
.flags = IORESOURCE_MEM,
},
[1] = {
.start = ATH79_CPU_IRQ_USB,
.end = ATH79_CPU_IRQ_USB,
.flags = IORESOURCE_IRQ,
},
};
static u64 ath79_ehci_dmamask = DMA_BIT_MASK(32);
static struct platform_device ath79_ehci_device = {
.name = "ath79-ehci",
.id = -1,
.resource = ath79_ehci_resources,
.num_resources = ARRAY_SIZE(ath79_ehci_resources),
.dev = {
.dma_mask = &ath79_ehci_dmamask,
.coherent_dma_mask = DMA_BIT_MASK(32),
},
};
#define AR71XX_USB_RESET_MASK (AR71XX_RESET_USB_HOST | \
AR71XX_RESET_USB_PHY | \
AR71XX_RESET_USB_OHCI_DLL)
static void __init ath79_usb_setup(void)
{
void __iomem *usb_ctrl_base;
ath79_device_reset_set(AR71XX_USB_RESET_MASK);
mdelay(1000);
ath79_device_reset_clear(AR71XX_USB_RESET_MASK);
usb_ctrl_base = ioremap(AR71XX_USB_CTRL_BASE, AR71XX_USB_CTRL_SIZE);
/* Turning on the Buff and Desc swap bits */
__raw_writel(0xf0000, usb_ctrl_base + AR71XX_USB_CTRL_REG_CONFIG);
/* WAR for HW bug. Here it adjusts the duration between two SOFS */
__raw_writel(0x20c00, usb_ctrl_base + AR71XX_USB_CTRL_REG_FLADJ);
iounmap(usb_ctrl_base);
mdelay(900);
ath79_ohci_resources[0].start = AR71XX_OHCI_BASE;
ath79_ohci_resources[0].end = AR71XX_OHCI_BASE + AR71XX_OHCI_SIZE - 1;
platform_device_register(&ath79_ohci_device);
ath79_ehci_resources[0].start = AR71XX_EHCI_BASE;
ath79_ehci_resources[0].end = AR71XX_EHCI_BASE + AR71XX_EHCI_SIZE - 1;
ath79_ehci_device.name = "ar71xx-ehci";
platform_device_register(&ath79_ehci_device);
}
static void __init ar7240_usb_setup(void)
{
void __iomem *usb_ctrl_base;
ath79_device_reset_clear(AR7240_RESET_OHCI_DLL);
ath79_device_reset_set(AR7240_RESET_USB_HOST);
mdelay(1000);
ath79_device_reset_set(AR7240_RESET_OHCI_DLL);
ath79_device_reset_clear(AR7240_RESET_USB_HOST);
usb_ctrl_base = ioremap(AR7240_USB_CTRL_BASE, AR7240_USB_CTRL_SIZE);
/* WAR for HW bug. Here it adjusts the duration between two SOFS */
__raw_writel(0x3, usb_ctrl_base + AR71XX_USB_CTRL_REG_FLADJ);
iounmap(usb_ctrl_base);
ath79_ohci_resources[0].start = AR7240_OHCI_BASE;
ath79_ohci_resources[0].end = AR7240_OHCI_BASE + AR7240_OHCI_SIZE - 1;
platform_device_register(&ath79_ohci_device);
}
static void __init ar724x_usb_setup(void)
{
ath79_device_reset_set(AR724X_RESET_USBSUS_OVERRIDE);
mdelay(10);
ath79_device_reset_clear(AR724X_RESET_USB_HOST);
mdelay(10);
ath79_device_reset_clear(AR724X_RESET_USB_PHY);
mdelay(10);
ath79_ehci_resources[0].start = AR724X_EHCI_BASE;
ath79_ehci_resources[0].end = AR724X_EHCI_BASE + AR724X_EHCI_SIZE - 1;
ath79_ehci_device.name = "ar724x-ehci";
platform_device_register(&ath79_ehci_device);
}
static void __init ar913x_usb_setup(void)
{
ath79_device_reset_set(AR913X_RESET_USBSUS_OVERRIDE);
mdelay(10);
ath79_device_reset_clear(AR913X_RESET_USB_HOST);
mdelay(10);
ath79_device_reset_clear(AR913X_RESET_USB_PHY);
mdelay(10);
ath79_ehci_resources[0].start = AR913X_EHCI_BASE;
ath79_ehci_resources[0].end = AR913X_EHCI_BASE + AR913X_EHCI_SIZE - 1;
ath79_ehci_device.name = "ar913x-ehci";
platform_device_register(&ath79_ehci_device);
}
void __init ath79_register_usb(void)
{
if (soc_is_ar71xx())
ath79_usb_setup();
else if (soc_is_ar7240())
ar7240_usb_setup();
else if (soc_is_ar7241() || soc_is_ar7242())
ar724x_usb_setup();
else if (soc_is_ar913x())
ar913x_usb_setup();
else
BUG();
}