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@xxxxxxxxxxx>
Signed-off-by: Imre Kaloz <kaloz@xxxxxxxxxxx>
---
Changes since RFC: ---
Changes since v1:
- rebased against 2.6.37-rc7
Changes since v2:
- don't use __init for function declarations
arch/mips/ath79/Kconfig | 4 +
arch/mips/ath79/Makefile | 1 +
arch/mips/ath79/dev-usb.c | 194 ++++++++++++++++++++++++
arch/mips/ath79/dev-usb.h | 17 ++
arch/mips/ath79/mach-pb44.c | 2 +
arch/mips/include/asm/mach-ath79/ar71xx_regs.h | 22 +++-
6 files changed, 239 insertions(+), 1 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 d4456ce..5d67942 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
help
Say 'Y' here if you want your kernel to support the
Atheros PB44 reference board.
@@ -37,4 +38,7 @@ config ATH79_DEV_LEDS_GPIO
config ATH79_DEV_SPI
def_bool n
+config ATH79_DEV_USB
+ def_bool n
+
endif
diff --git a/arch/mips/ath79/Makefile b/arch/mips/ath79/Makefile
index a8de078..494d106 100644
--- a/arch/mips/ath79/Makefile
+++ b/arch/mips/ath79/Makefile
@@ -19,6 +19,7 @@ obj-y += dev-common.o
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_USB) += dev-usb.o
#
# Machines
diff --git a/arch/mips/ath79/dev-usb.c b/arch/mips/ath79/dev-usb.c
new file mode 100644
index 0000000..fb7033f
--- /dev/null
+++ b/arch/mips/ath79/dev-usb.c
@@ -0,0 +1,194 @@
+/*
+ * Atheros AR71XX/AR724X/AR913X USB Host Controller support
+ *
+ * Copyright (C) 2008-2010 Gabor Juhos <juhosg@xxxxxxxxxxx>
+ * Copyright (C) 2008 Imre Kaloz <kaloz@xxxxxxxxxxx>
+ *
+ * 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_reset_set(AR71XX_USB_RESET_MASK);
+ mdelay(1000);
+ ath79_device_reset_clear(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);
+}
+
+static void __init ar7240_usb_setup(void)
+{
+ 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);
+
+ /* 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_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_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_reset_set(AR71XX_RESET_USBSUS_OVERRIDE);
+ mdelay(10);
+
+ ath79_device_reset_clear(AR71XX_RESET_USB_HOST);
+ mdelay(10);
+
+ ath79_device_reset_clear(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@xxxxxxxxxxx>
+ * Copyright (C) 2008 Imre Kaloz <kaloz@xxxxxxxxxxx>
+ *
+ * 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);
+
+#endif /* _ATH79_DEV_USB_H */
diff --git a/arch/mips/ath79/mach-pb44.c b/arch/mips/ath79/mach-pb44.c
index ec7b7a1..fe9701a 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
@@ -112,6 +113,7 @@ static void __init pb44_init(void)
pb44_gpio_keys);
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..f125f1e 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
@@ -155,12 +170,17 @@
#define AR71XX_RESET_PCI_BUS BIT(1)
#define AR71XX_RESET_PCI_CORE BIT(0)
+#define AR7240_RESET_USB_HOST BIT(5)
+#define AR7240_RESET_OHCI_DLL BIT(3)
+
#define AR724X_RESET_GE1_MDIO BIT(23)
#define AR724X_RESET_GE0_MDIO BIT(22)
#define AR724X_RESET_PCIE_PHY_SERIAL BIT(10)
#define AR724X_RESET_PCIE_PHY BIT(7)
#define AR724X_RESET_PCIE BIT(6)
-#define AR724X_RESET_OHCI_DLL BIT(3)
+#define AR724X_RESET_USB_HOST BIT(5)
+#define AR724X_RESET_USB_PHY BIT(4)
+#define AR724X_RESET_USBSUS_OVERRIDE BIT(3)
#define AR913X_RESET_AMBA2WMAC BIT(22)
--
1.7.2.1
