[PATCH] ARM: LPC32xx: Support for OHCI HCD
stigge at antcom.de
stigge at antcom.de
Wed Feb 1 08:30:28 EST 2012
This patch adds OHCI support to the LPC32xx ARM platform
Signed-off-by: Roland Stigge <stigge at antcom.de>
diff --git a/arch/arm/mach-lpc32xx/common.c b/arch/arm/mach-lpc32xx/common.c
index 369b152..f220eb0 100644
--- a/arch/arm/mach-lpc32xx/common.c
+++ b/arch/arm/mach-lpc32xx/common.c
@@ -137,6 +137,31 @@ struct platform_device lpc32xx_rtc_device = {
.resource = lpc32xx_rtc_resources,
};
+#if defined(CONFIG_USB_OHCI_HCD)
+/* The dmamask must be set for OHCI to work */
+static u64 ohci_dmamask = ~(u32) 0;
+static struct resource ohci_resources[] = {
+ {
+ .start = IO_ADDRESS(LPC32XX_USB_BASE),
+ .end = IO_ADDRESS(LPC32XX_USB_BASE + 0x100),
+ .flags = IORESOURCE_MEM,
+ }, {
+ .start = IRQ_LPC32XX_USB_HOST,
+ .flags = IORESOURCE_IRQ,
+ },
+};
+struct platform_device lpc32xx_ohci_device = {
+ .name = "usb-ohci",
+ .id = -1,
+ .dev = {
+ .dma_mask = &ohci_dmamask,
+ .coherent_dma_mask = 0xFFFFFFFF,
+ },
+ .num_resources = ARRAY_SIZE(ohci_resources),
+ .resource = ohci_resources,
+};
+#endif
+
/*
* Returns the unique ID for the device
*/
diff --git a/arch/arm/mach-lpc32xx/common.h b/arch/arm/mach-lpc32xx/common.h
index 4b4e700..f63d43c 100644
--- a/arch/arm/mach-lpc32xx/common.h
+++ b/arch/arm/mach-lpc32xx/common.h
@@ -30,6 +30,7 @@ extern struct platform_device lpc32xx_i2c1_device;
extern struct platform_device lpc32xx_i2c2_device;
extern struct platform_device lpc32xx_tsc_device;
extern struct platform_device lpc32xx_rtc_device;
+extern struct platform_device lpc32xx_ohci_device;
/*
* Other arch specific structures and functions
diff --git a/arch/arm/mach-lpc32xx/phy3250.c b/arch/arm/mach-lpc32xx/phy3250.c
index bfee5b4..4e81e99 100644
--- a/arch/arm/mach-lpc32xx/phy3250.c
+++ b/arch/arm/mach-lpc32xx/phy3250.c
@@ -276,6 +276,9 @@ static struct platform_device *phy3250_devs[] __initdata = {
&lpc32xx_i2c2_device,
&lpc32xx_watchdog_device,
&lpc32xx_gpio_led_device,
+#if defined(CONFIG_USB_OHCI_HCD)
+ &lpc32xx_ohci_device,
+#endif
};
static struct amba_device *amba_devs[] __initdata = {
diff --git a/drivers/usb/host/ohci-hcd.c b/drivers/usb/host/ohci-hcd.c
index 34b9edd..4285335 100644
--- a/drivers/usb/host/ohci-hcd.c
+++ b/drivers/usb/host/ohci-hcd.c
@@ -1055,6 +1055,11 @@ MODULE_LICENSE ("GPL");
#define PLATFORM_DRIVER usb_hcd_pnx4008_driver
#endif
+#ifdef CONFIG_ARCH_LPC32XX
+#include "ohci-pnx4008.c"
+#define PLATFORM_DRIVER usb_hcd_pnx4008_driver
+#endif
+
#ifdef CONFIG_ARCH_DAVINCI_DA8XX
#include "ohci-da8xx.c"
#define PLATFORM_DRIVER ohci_hcd_da8xx_driver
diff --git a/drivers/usb/host/ohci-pnx4008.c b/drivers/usb/host/ohci-pnx4008.c
index 0013db7..de05a6d 100644
--- a/drivers/usb/host/ohci-pnx4008.c
+++ b/drivers/usb/host/ohci-pnx4008.c
@@ -24,8 +24,15 @@
#include <mach/hardware.h>
#include <asm/io.h>
+#if defined(CONFIG_ARCH_LPC32XX)
#include <mach/platform.h>
#include <mach/irqs.h>
+#define PNX4008_PWRMAN_BASE LPC32XX_CLK_PM_BASE
+#define PNX4008_USB_CONFIG_BASE LPC32XX_USB_BASE
+#else
+#include <mach/platform.h>
+#include <mach/irqs.h>
+#endif
#include <asm/gpio.h>
#define USB_CTRL IO_ADDRESS(PNX4008_PWRMAN_BASE + 0x64)
@@ -143,8 +150,21 @@ static void i2c_write(u8 buf, u8 subaddr)
i2c_master_send(isp1301_i2c_client, &tmpbuf[0], 2);
}
+#ifdef CONFIG_ARCH_LPC32XX
+static u16 i2c_read16(u8 subaddr)
+{
+ u16 data;
+
+ i2c_master_send(isp1301_i2c_client, &subaddr, 1);
+ i2c_master_recv(isp1301_i2c_client, (u8 *) &data, 2);
+
+ return data;
+}
+#endif
+
static void isp1301_configure(void)
{
+#if !defined(CONFIG_ARCH_LPC32XX)
/* PNX4008 only supports DAT_SE0 USB mode */
/* PNX4008 R2A requires setting the MAX603 to output 3.6V */
/* Power up externel charge-pump */
@@ -166,7 +186,41 @@ static void isp1301_configure(void)
ISP1301_I2C_INTERRUPT_FALLING | ISP1301_I2C_REG_CLEAR_ADDR);
i2c_write(0xFF,
ISP1301_I2C_INTERRUPT_RISING | ISP1301_I2C_REG_CLEAR_ADDR);
-
+#else
+ /* LPC32XX only supports DAT_SE0 USB mode */
+ /* This sequence is important */
+
+ /* Disable transparent UART mode first */
+ i2c_write(MC1_UART_EN, (ISP1301_I2C_MODE_CONTROL_1 |
+ ISP1301_I2C_REG_CLEAR_ADDR));
+
+ i2c_write(~MC1_SPEED_REG, (ISP1301_I2C_MODE_CONTROL_1 |
+ ISP1301_I2C_REG_CLEAR_ADDR));
+ i2c_write(MC1_SPEED_REG, ISP1301_I2C_MODE_CONTROL_1);
+ i2c_write(~0,
+ (ISP1301_I2C_MODE_CONTROL_2 | ISP1301_I2C_REG_CLEAR_ADDR));
+ i2c_write((MC2_BI_DI | MC2_PSW_EN | MC2_SPD_SUSP_CTRL),
+ ISP1301_I2C_MODE_CONTROL_2);
+ i2c_write(~0, (ISP1301_I2C_OTG_CONTROL_1 | ISP1301_I2C_REG_CLEAR_ADDR));
+ i2c_write(MC1_DAT_SE0, ISP1301_I2C_MODE_CONTROL_1);
+ i2c_write((OTG1_DM_PULLDOWN | OTG1_DP_PULLDOWN),
+ ISP1301_I2C_OTG_CONTROL_1);
+ i2c_write((OTG1_DM_PULLUP | OTG1_DP_PULLUP),
+ (ISP1301_I2C_OTG_CONTROL_1 | ISP1301_I2C_REG_CLEAR_ADDR));
+ i2c_write(~0,
+ ISP1301_I2C_INTERRUPT_LATCH | ISP1301_I2C_REG_CLEAR_ADDR);
+ i2c_write(~0,
+ ISP1301_I2C_INTERRUPT_FALLING | ISP1301_I2C_REG_CLEAR_ADDR);
+ i2c_write(~0,
+ ISP1301_I2C_INTERRUPT_RISING | ISP1301_I2C_REG_CLEAR_ADDR);
+
+ /* Enable usb_need_clk clock after transceiver is initialized */
+ __raw_writel((__raw_readl(USB_CTRL) | (1 << 22)), USB_CTRL);
+
+ printk(KERN_INFO "ISP1301 Vendor ID : 0x%04x\n", i2c_read16(0x00));
+ printk(KERN_INFO "ISP1301 Product ID : 0x%04x\n", i2c_read16(0x02));
+ printk(KERN_INFO "ISP1301 Version ID : 0x%04x\n", i2c_read16(0x14));
+#endif
}
static inline void isp1301_vbus_on(void)
@@ -257,6 +311,7 @@ static const struct hc_driver ohci_pnx4008_hc_driver = {
static void pnx4008_set_usb_bits(void)
{
+#if !defined(CONFIG_ARCH_LPC32XX)
start_int_set_falling_edge(SE_USB_OTG_ATX_INT_N);
start_int_ack(SE_USB_OTG_ATX_INT_N);
start_int_umask(SE_USB_OTG_ATX_INT_N);
@@ -280,16 +335,19 @@ static void pnx4008_set_usb_bits(void)
start_int_set_rising_edge(SE_USB_AHB_NEED_CLK_INT);
start_int_ack(SE_USB_AHB_NEED_CLK_INT);
start_int_umask(SE_USB_AHB_NEED_CLK_INT);
+#endif
}
static void pnx4008_unset_usb_bits(void)
{
+#if !defined(CONFIG_ARCH_LPC32XX)
start_int_mask(SE_USB_OTG_ATX_INT_N);
start_int_mask(SE_USB_OTG_TIMER_INT);
start_int_mask(SE_USB_I2C_INT);
start_int_mask(SE_USB_INT);
start_int_mask(SE_USB_NEED_CLK_INT);
start_int_mask(SE_USB_AHB_NEED_CLK_INT);
+#endif
}
static int __devinit usb_hcd_pnx4008_probe(struct platform_device *pdev)
More information about the linux-arm-kernel
mailing list