dev-usb.c

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/*
 *  Atheros AR7XXX/AR9XXX USB Host Controller device
 *
 *  Copyright (C) 2008-2011 Gabor Juhos <[email protected]>
 *  Copyright (C) 2008 Imre Kaloz <[email protected]>
 *
 *  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 <linux/usb/ehci_pdriver.h>
#include <linux/usb/ohci_pdriver.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[2];

static u64 ath79_ohci_dmamask = DMA_BIT_MASK(32);

static struct usb_ohci_pdata ath79_ohci_pdata = {
};

static struct platform_device ath79_ohci_device = {
    .name       = "ohci-platform",
    .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),
        .platform_data      = &ath79_ohci_pdata,
    },
};

static struct resource ath79_ehci_resources[2];

static u64 ath79_ehci_dmamask = DMA_BIT_MASK(32);

static struct usb_ehci_pdata ath79_ehci_pdata_v1 = {
    .has_synopsys_hc_bug    = 1,
    .port_power_off     = 1,
};

static struct usb_ehci_pdata ath79_ehci_pdata_v2 = {
    .caps_offset        = 0x100,
    .has_tt         = 1,
    .port_power_off     = 1,
};

static struct platform_device ath79_ehci_device = {
    .name       = "ehci-platform",
    .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),
    },
};

static void __init ath79_usb_init_resource(struct resource res[2],
                       unsigned long base,
                       unsigned long size,
                       int irq)
{
    res[0].flags = IORESOURCE_MEM;
    res[0].start = base;
    res[0].end = base + size - 1;

    res[1].flags = IORESOURCE_IRQ;
    res[1].start = irq;
    res[1].end = irq;
}

#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_usb_init_resource(ath79_ohci_resources, AR71XX_OHCI_BASE,
                AR71XX_OHCI_SIZE, ATH79_MISC_IRQ_OHCI);
    platform_device_register(&ath79_ohci_device);

    ath79_usb_init_resource(ath79_ehci_resources, AR71XX_EHCI_BASE,
                AR71XX_EHCI_SIZE, ATH79_CPU_IRQ_USB);
    ath79_ehci_device.dev.platform_data = &ath79_ehci_pdata_v1;
    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_usb_init_resource(ath79_ohci_resources, AR7240_OHCI_BASE,
                AR7240_OHCI_SIZE, ATH79_CPU_IRQ_USB);
    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_usb_init_resource(ath79_ehci_resources, AR724X_EHCI_BASE,
                AR724X_EHCI_SIZE, ATH79_CPU_IRQ_USB);
    ath79_ehci_device.dev.platform_data = &ath79_ehci_pdata_v2;
    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_usb_init_resource(ath79_ehci_resources, AR913X_EHCI_BASE,
                AR913X_EHCI_SIZE, ATH79_CPU_IRQ_USB);
    ath79_ehci_device.dev.platform_data = &ath79_ehci_pdata_v2;
    platform_device_register(&ath79_ehci_device);
}

static void __init ar933x_usb_setup(void)
{
    ath79_device_reset_set(AR933X_RESET_USBSUS_OVERRIDE);
    mdelay(10);

    ath79_device_reset_clear(AR933X_RESET_USB_HOST);
    mdelay(10);

    ath79_device_reset_clear(AR933X_RESET_USB_PHY);
    mdelay(10);

    ath79_usb_init_resource(ath79_ehci_resources, AR933X_EHCI_BASE,
                AR933X_EHCI_SIZE, ATH79_CPU_IRQ_USB);
    ath79_ehci_device.dev.platform_data = &ath79_ehci_pdata_v2;
    platform_device_register(&ath79_ehci_device);
}

static void __init ar934x_usb_setup(void)
{
    u32 bootstrap;

    bootstrap = ath79_reset_rr(AR934X_RESET_REG_BOOTSTRAP);
    if (bootstrap & AR934X_BOOTSTRAP_USB_MODE_DEVICE)
        return;

    ath79_device_reset_set(AR934X_RESET_USBSUS_OVERRIDE);
    udelay(1000);

    ath79_device_reset_clear(AR934X_RESET_USB_PHY);
    udelay(1000);

    ath79_device_reset_clear(AR934X_RESET_USB_PHY_ANALOG);
    udelay(1000);

    ath79_device_reset_clear(AR934X_RESET_USB_HOST);
    udelay(1000);

    ath79_usb_init_resource(ath79_ehci_resources, AR934X_EHCI_BASE,
                AR934X_EHCI_SIZE, ATH79_CPU_IRQ_USB);
    ath79_ehci_device.dev.platform_data = &ath79_ehci_pdata_v2;
    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 if (soc_is_ar933x())
        ar933x_usb_setup();
    else if (soc_is_ar934x())
        ar934x_usb_setup();
    else
        BUG();
}