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[RFC 16/18] MIPS: ath79: add common USB Host Controller device

To: Ralf Baechle <ralf@linux-mips.org>
Subject: [RFC 16/18] MIPS: ath79: add common USB Host Controller device
From: Gabor Juhos <juhosg@openwrt.org>
Date: Fri, 12 Nov 2010 22:51:22 +0100
Cc: linux-mips@linux-mips.org, "Luis R. Rodriguez" <mcgrof@gmail.com>, Cliff Holden <Cliff.Holden@Atheros.com>, Imre Kaloz <kaloz@openwrt.org>, Gabor Juhos <juhosg@openwrt.org>
In-reply-to: <1289598684-30624-1-git-send-email-juhosg@openwrt.org>
Original-recipient: rfc822;linux-mips@linux-mips.org
References: <1289598684-30624-1-git-send-email-juhosg@openwrt.org>
Sender: linux-mips-bounce@linux-mips.org
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 PB44 board.

Signed-off-by: Gabor Juhos <juhosg@openwrt.org>
Signed-off-by: Imre Kaloz <kaloz@openwrt.org>
---
 arch/mips/ath79/Kconfig                        |    4 +
 arch/mips/ath79/Makefile                       |    1 +
 arch/mips/ath79/dev-usb.c                      |  192 ++++++++++++++++++++++++
 arch/mips/ath79/dev-usb.h                      |   17 ++
 arch/mips/ath79/mach-pb44.c                    |    2 +
 arch/mips/include/asm/mach-ath79/ar71xx_regs.h |   15 ++
 6 files changed, 231 insertions(+), 0 deletions(-)
 create mode 100644 arch/mips/ath79/dev-usb.c
 create mode 100644 arch/mips/ath79/dev-usb.h

diff --git a/arch/mips/ath79/Kconfig b/arch/mips/ath79/Kconfig
index 78f9999..9843044 100644
--- a/arch/mips/ath79/Kconfig
+++ b/arch/mips/ath79/Kconfig
@@ -8,6 +8,7 @@ config ATH79_MACH_PB44
        select ATH79_DEV_GPIO_BUTTONS
        select ATH79_DEV_LEDS_GPIO
        select ATH79_DEV_SPI
+       select ATH79_DEV_USB
        default n
        help
          Say 'Y' here if you want your kernel to support the
@@ -36,6 +37,9 @@ config ATH79_DEV_SPI
 config ATH79_DEV_UART
        def_bool y
 
+config ATH79_DEV_USB
+       def_bool n
+
 config ATH79_DEV_WDT
        def_bool y
 
diff --git a/arch/mips/ath79/Makefile b/arch/mips/ath79/Makefile
index 875df71..e0c07a7 100644
--- a/arch/mips/ath79/Makefile
+++ b/arch/mips/ath79/Makefile
@@ -16,6 +16,7 @@ obj-$(CONFIG_ATH79_DEV_GPIO_BUTTONS)  += dev-gpio-buttons.o
 obj-$(CONFIG_ATH79_DEV_LEDS_GPIO)      += dev-leds-gpio.o
 obj-$(CONFIG_ATH79_DEV_SPI)            += dev-spi.o
 obj-$(CONFIG_ATH79_DEV_UART)           += dev-uart.o
+obj-$(CONFIG_ATH79_DEV_USB)            += dev-usb.o
 obj-$(CONFIG_ATH79_DEV_WDT)            += dev-wdt.o
 
 #
diff --git a/arch/mips/ath79/dev-usb.c b/arch/mips/ath79/dev-usb.c
new file mode 100644
index 0000000..78b049a
--- /dev/null
+++ b/arch/mips/ath79/dev-usb.c
@@ -0,0 +1,192 @@
+/*
+ *  Atheros AR71XX/AR724X/AR913X USB Host Controller support
+ *
+ *  Copyright (C) 2008-2010 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 <asm/mach-ath79/ath79_ehci_platform.h>
+#include "common.h"
+#include "dev-usb.h"
+
+static void __iomem *ath79_usb_ctrl_base;
+
+static struct resource ar71xx_ohci_resources[] = {
+       [0] = {
+               .start  = AR71XX_OHCI_BASE,
+               .end    = AR71XX_OHCI_BASE + AR71XX_OHCI_SIZE - 1,
+               .flags  = IORESOURCE_MEM,
+       },
+       [1] = {
+               .start  = ATH79_MISC_IRQ_OHCI,
+               .end    = ATH79_MISC_IRQ_OHCI,
+               .flags  = IORESOURCE_IRQ,
+       },
+};
+
+static struct resource ar724x_usb_resources[] = {
+       [0] = {
+               .start  = AR7240_OHCI_BASE,
+               .end    = AR7240_OHCI_BASE + AR7240_OHCI_SIZE - 1,
+               .flags  = IORESOURCE_MEM,
+       },
+       [1] = {
+               .start  = ATH79_CPU_IRQ_USB,
+               .end    = ATH79_CPU_IRQ_USB,
+               .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       = ar71xx_ohci_resources,
+       .num_resources  = ARRAY_SIZE(ar71xx_ohci_resources),
+       .dev = {
+               .dma_mask               = &ath79_ohci_dmamask,
+               .coherent_dma_mask      = DMA_BIT_MASK(32),
+       },
+};
+
+static struct resource ar71xx_ehci_resources[] = {
+       [0] = {
+               .start  = AR71XX_EHCI_BASE,
+               .end    = AR71XX_EHCI_BASE + AR71XX_EHCI_SIZE - 1,
+               .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 ath79_ehci_platform_data ath79_ehci_data;
+
+static struct platform_device ath79_ehci_device = {
+       .name           = "ath79-ehci",
+       .id             = -1,
+       .resource       = ar71xx_ehci_resources,
+       .num_resources  = ARRAY_SIZE(ar71xx_ehci_resources),
+       .dev = {
+               .dma_mask               = &ath79_ehci_dmamask,
+               .coherent_dma_mask      = DMA_BIT_MASK(32),
+               .platform_data          = &ath79_ehci_data,
+       },
+};
+
+#define AR71XX_USB_RESET_MASK  (AR71XX_RESET_USB_HOST | \
+                                AR71XX_RESET_USB_PHY | \
+                                AR71XX_RESET_USB_OHCI_DLL)
+
+static void __init ar71xx_usb_setup(void)
+{
+       ath79_device_stop(AR71XX_USB_RESET_MASK);
+       mdelay(1000);
+       ath79_device_start(AR71XX_USB_RESET_MASK);
+
+       /* Turning on the Buff and Desc swap bits */
+       __raw_writel(0xf0000, ath79_usb_ctrl_base + AR71XX_USB_CTRL_REG_CONFIG);
+
+       /* WAR for HW bug. Here it adjusts the duration between two SOFS */
+       __raw_writel(0x20c00, ath79_usb_ctrl_base + AR71XX_USB_CTRL_REG_FLADJ);
+
+       mdelay(900);
+
+       platform_device_register(&ath79_ohci_device);
+       platform_device_register(&ath79_ehci_device);
+}
+
+#define AR724X_USB_RESET_MASK  (AR71XX_RESET_USB_HOST | AR724X_RESET_OHCI_DLL)
+
+static void __init ar7240_usb_setup(void)
+{
+       ath79_device_stop(AR724X_USB_RESET_MASK);
+       mdelay(1000);
+       ath79_device_start(AR724X_USB_RESET_MASK);
+
+       /* WAR for HW bug. Here it adjusts the duration between two SOFS */
+       __raw_writel(0x3, ath79_usb_ctrl_base + AR71XX_USB_CTRL_REG_FLADJ);
+
+       ath79_ohci_device.resource = ar724x_usb_resources;
+       ath79_ohci_device.num_resources = ARRAY_SIZE(ar724x_usb_resources);
+       platform_device_register(&ath79_ohci_device);
+}
+
+static void __init ar724x_usb_setup(void)
+{
+       ath79_device_stop(AR724X_USB_RESET_MASK);
+       mdelay(1000);
+       ath79_device_start(AR724X_USB_RESET_MASK);
+
+       /* WAR for HW bug. Here it adjusts the duration between two SOFS */
+       __raw_writel(0x3, ath79_usb_ctrl_base + AR71XX_USB_CTRL_REG_FLADJ);
+
+       ath79_ehci_data.is_ar913x = 1;
+       ath79_ehci_device.resource = ar724x_usb_resources;
+       ath79_ehci_device.num_resources = ARRAY_SIZE(ar724x_usb_resources);
+       platform_device_register(&ath79_ehci_device);
+}
+
+static void __init ar913x_usb_setup(void)
+{
+       ath79_device_stop(AR71XX_RESET_USBSUS_OVERRIDE);
+       mdelay(10);
+
+       ath79_device_start(AR71XX_RESET_USB_HOST);
+       mdelay(10);
+
+       ath79_device_start(AR71XX_RESET_USB_PHY);
+       mdelay(10);
+
+       ath79_ehci_data.is_ar913x = 1;
+       platform_device_register(&ath79_ehci_device);
+}
+
+void __init ath79_register_usb(void)
+{
+       ath79_usb_ctrl_base = ioremap(AR71XX_USB_CTRL_BASE,
+                                     AR71XX_USB_CTRL_SIZE);
+
+       switch (ath79_soc) {
+       case ATH79_SOC_AR7130:
+       case ATH79_SOC_AR7141:
+       case ATH79_SOC_AR7161:
+               ar71xx_usb_setup();
+               break;
+
+       case ATH79_SOC_AR7240:
+               ar7240_usb_setup();
+               break;
+
+       case ATH79_SOC_AR7241:
+       case ATH79_SOC_AR7242:
+               ar724x_usb_setup();
+               break;
+
+       case ATH79_SOC_AR9130:
+       case ATH79_SOC_AR9132:
+               ar913x_usb_setup();
+               break;
+
+       default:
+               BUG();
+       }
+}
diff --git a/arch/mips/ath79/dev-usb.h b/arch/mips/ath79/dev-usb.h
new file mode 100644
index 0000000..dbe6d3d
--- /dev/null
+++ b/arch/mips/ath79/dev-usb.h
@@ -0,0 +1,17 @@
+/*
+ *  Atheros AR71XX/AR724X/AR913X USB Host Controller support
+ *
+ *  Copyright (C) 2008-2010 Gabor Juhos <juhosg@openwrt.org>
+ *  Copyright (C) 2008 Imre Kaloz <kaloz@openwrt.org>
+ *
+ *  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.
+ */
+
+#ifndef _ATH79_DEV_USB_H
+#define _ATH79_DEV_USB_H
+
+void ath79_register_usb(void) __init;
+
+#endif /* _ATH79_DEV_USB_H */
diff --git a/arch/mips/ath79/mach-pb44.c b/arch/mips/ath79/mach-pb44.c
index 257815e..3e0bb05 100644
--- a/arch/mips/ath79/mach-pb44.c
+++ b/arch/mips/ath79/mach-pb44.c
@@ -18,6 +18,7 @@
 #include "dev-gpio-buttons.h"
 #include "dev-leds-gpio.h"
 #include "dev-spi.h"
+#include "dev-usb.h"
 
 #define PB44_GPIO_I2C_SCL      0
 #define PB44_GPIO_I2C_SDA      1
@@ -111,6 +112,7 @@ static void __init pb44_init(void)
                                    pb44_gpio_buttons);
        ath79_register_spi(&pb44_spi_data, pb44_spi_info,
                           ARRAY_SIZE(pb44_spi_info));
+       ath79_register_usb();
 }
 
 MIPS_MACHINE(ATH79_MACH_PB44, "PB44", "Atheros PB44 reference board",
diff --git a/arch/mips/include/asm/mach-ath79/ar71xx_regs.h 
b/arch/mips/include/asm/mach-ath79/ar71xx_regs.h
index 4f2b621..95be423 100644
--- a/arch/mips/include/asm/mach-ath79/ar71xx_regs.h
+++ b/arch/mips/include/asm/mach-ath79/ar71xx_regs.h
@@ -20,6 +20,10 @@
 #include <linux/bitops.h>
 
 #define AR71XX_APB_BASE                0x18000000
+#define AR71XX_EHCI_BASE       0x1b000000
+#define AR71XX_EHCI_SIZE       0x1000
+#define AR71XX_OHCI_BASE       0x1c000000
+#define AR71XX_OHCI_SIZE       0x1000
 #define AR71XX_SPI_BASE                0x1f000000
 #define AR71XX_SPI_SIZE                0x01000000
 
@@ -27,6 +31,8 @@
 #define AR71XX_DDR_CTRL_SIZE   0x100
 #define AR71XX_UART_BASE       (AR71XX_APB_BASE + 0x00020000)
 #define AR71XX_UART_SIZE       0x100
+#define AR71XX_USB_CTRL_BASE   (AR71XX_APB_BASE + 0x00030000)
+#define AR71XX_USB_CTRL_SIZE   0x100
 #define AR71XX_GPIO_BASE        (AR71XX_APB_BASE + 0x00040000)
 #define AR71XX_GPIO_SIZE        0x100
 #define AR71XX_PLL_BASE                (AR71XX_APB_BASE + 0x00050000)
@@ -34,6 +40,9 @@
 #define AR71XX_RESET_BASE      (AR71XX_APB_BASE + 0x00060000)
 #define AR71XX_RESET_SIZE      0x100
 
+#define AR7240_OHCI_BASE       0x1b000000
+#define AR7240_OHCI_SIZE       0x1000
+
 /*
  * DDR_CTRL block
  */
@@ -102,6 +111,12 @@
 #define AR913X_AHB_DIV_MASK            0x1
 
 /*
+ * USB_CONFIG block
+ */
+#define AR71XX_USB_CTRL_REG_FLADJ      0x00
+#define AR71XX_USB_CTRL_REG_CONFIG     0x04
+
+/*
  * RESET block
  */
 #define AR71XX_RESET_REG_TIMER                 0x00
-- 
1.7.2.1


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