MIPS: ath79: add common USB Host Controller device

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>

1 files changed, 178 insertions, 0 deletions

diff --git a/arch/mips/ath79/dev-usb.c b/arch/mips/ath79/dev-usb.c
new file mode 100644
index 000000000000..c3f1999c761b
--- /dev/null
+++ b/arch/mips/ath79/dev-usb.c
@@ -0,0 +1,178 @@
+/*
+ *  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();
+}