[PATCH v4] USB: Support for LPC32xx SoC
From: Roland Stigge
Date: Thu Mar 08 2012 - 17:10:18 EST
This patch adds OHCI support to the LPC32xx ARM platform
Signed-off-by: Roland Stigge <stigge@xxxxxxxxx>
---
Applies to v3.3-rc6
Since v3, only the machine_is_*() dependencies have been pulled into
the machine dependent functions.
Thanks to Greg Kroah-Hartman for reviewing!
drivers/usb/host/ohci-hcd.c | 5 +
drivers/usb/host/ohci-pnx4008.c | 119 +++++++++++++++++++++++++++++-----------
2 files changed, 94 insertions(+), 30 deletions(-)
--- linux-2.6.orig/drivers/usb/host/ohci-hcd.c
+++ linux-2.6/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
--- linux-2.6.orig/drivers/usb/host/ohci-pnx4008.c
+++ linux-2.6/drivers/usb/host/ohci-pnx4008.c
@@ -22,6 +22,7 @@
#include <linux/i2c.h>
#include <mach/hardware.h>
+#include <asm/mach-types.h>
#include <asm/io.h>
#include <mach/platform.h>
@@ -143,7 +144,17 @@ static void i2c_write(u8 buf, u8 subaddr
i2c_master_send(isp1301_i2c_client, &tmpbuf[0], 2);
}
-static void isp1301_configure(void)
+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;
+}
+
+static void isp1301_configure_pnx4008(void)
{
/* PNX4008 only supports DAT_SE0 USB mode */
/* PNX4008 R2A requires setting the MAX603 to output 3.6V */
@@ -166,7 +177,51 @@ 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);
+}
+static void isp1301_configure_lpc32xx(void)
+{
+ /* 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));
+}
+
+static void isp1301_configure(void)
+{
+ if (machine_is_pnx4008())
+ isp1301_configure_pnx4008();
+ else
+ isp1301_configure_lpc32xx();
}
static inline void isp1301_vbus_on(void)
@@ -257,39 +312,43 @@ static const struct hc_driver ohci_pnx40
static void pnx4008_set_usb_bits(void)
{
- 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);
-
- start_int_set_rising_edge(SE_USB_OTG_TIMER_INT);
- start_int_ack(SE_USB_OTG_TIMER_INT);
- start_int_umask(SE_USB_OTG_TIMER_INT);
-
- start_int_set_rising_edge(SE_USB_I2C_INT);
- start_int_ack(SE_USB_I2C_INT);
- start_int_umask(SE_USB_I2C_INT);
-
- start_int_set_rising_edge(SE_USB_INT);
- start_int_ack(SE_USB_INT);
- start_int_umask(SE_USB_INT);
-
- start_int_set_rising_edge(SE_USB_NEED_CLK_INT);
- start_int_ack(SE_USB_NEED_CLK_INT);
- start_int_umask(SE_USB_NEED_CLK_INT);
-
- 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);
+ if (machine_is_pnx4008()) {
+ 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);
+
+ start_int_set_rising_edge(SE_USB_OTG_TIMER_INT);
+ start_int_ack(SE_USB_OTG_TIMER_INT);
+ start_int_umask(SE_USB_OTG_TIMER_INT);
+
+ start_int_set_rising_edge(SE_USB_I2C_INT);
+ start_int_ack(SE_USB_I2C_INT);
+ start_int_umask(SE_USB_I2C_INT);
+
+ start_int_set_rising_edge(SE_USB_INT);
+ start_int_ack(SE_USB_INT);
+ start_int_umask(SE_USB_INT);
+
+ start_int_set_rising_edge(SE_USB_NEED_CLK_INT);
+ start_int_ack(SE_USB_NEED_CLK_INT);
+ start_int_umask(SE_USB_NEED_CLK_INT);
+
+ 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);
+ }
}
static void pnx4008_unset_usb_bits(void)
{
- 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);
+ if (machine_is_pnx4008()) {
+ 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);
+ }
}
static int __devinit usb_hcd_pnx4008_probe(struct platform_device *pdev)
--
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