[PATCH v4] MXC: mach_armadillo5x0: Add USB Host support.
Alberto Panizzo
maramaopercheseimorto at gmail.com
Fri Feb 26 12:36:32 EST 2010
This add USB Host capability. The Armadillo 500 board is supplied
with two USB Host connectors driven by the USB OTG and USB Host 2
ports, through two NXP isp 1504 transceivers.
Signed-off-by: Alberto Panizzo <maramaopercheseimorto at gmail.com>
---
This patch is based on top of Pengutronix mxc-master branch.
Please, if possible add this for 2.6.34.
Thanks.
changes since v3:
-Correct the error handling as addressed by Russell.
Alberto!
arch/arm/mach-mx3/Kconfig | 1 +
arch/arm/mach-mx3/mach-armadillo5x0.c | 166 +++++++++++++++++++++++++++++++++
2 files changed, 167 insertions(+), 0 deletions(-)
diff --git a/arch/arm/mach-mx3/Kconfig b/arch/arm/mach-mx3/Kconfig
index 3872af1..96069a4 100644
--- a/arch/arm/mach-mx3/Kconfig
+++ b/arch/arm/mach-mx3/Kconfig
@@ -95,6 +95,7 @@ config MACH_PCM043
config MACH_ARMADILLO5X0
bool "Support Atmark Armadillo-500 Development Base Board"
select ARCH_MX31
+ select MXC_ULPI if USB_ULPI
help
Include support for Atmark Armadillo-500 platform. This includes
specific configurations for the board and its peripherals.
diff --git a/arch/arm/mach-mx3/mach-armadillo5x0.c b/arch/arm/mach-mx3/mach-armadillo5x0.c
index 3d72b0b..5f72ec9 100644
--- a/arch/arm/mach-mx3/mach-armadillo5x0.c
+++ b/arch/arm/mach-mx3/mach-armadillo5x0.c
@@ -36,6 +36,9 @@
#include <linux/input.h>
#include <linux/gpio_keys.h>
#include <linux/i2c.h>
+#include <linux/usb/otg.h>
+#include <linux/usb/ulpi.h>
+#include <linux/delay.h>
#include <mach/hardware.h>
#include <asm/mach-types.h>
@@ -52,6 +55,8 @@
#include <mach/ipu.h>
#include <mach/mx3fb.h>
#include <mach/mxc_nand.h>
+#include <mach/mxc_ehci.h>
+#include <mach/ulpi.h>
#include "devices.h"
#include "crm_regs.h"
@@ -103,8 +108,158 @@ static int armadillo5x0_pins[] = {
/* I2C2 */
MX31_PIN_CSPI2_MOSI__SCL,
MX31_PIN_CSPI2_MISO__SDA,
+ /* OTG */
+ MX31_PIN_USBOTG_DATA0__USBOTG_DATA0,
+ MX31_PIN_USBOTG_DATA1__USBOTG_DATA1,
+ MX31_PIN_USBOTG_DATA2__USBOTG_DATA2,
+ MX31_PIN_USBOTG_DATA3__USBOTG_DATA3,
+ MX31_PIN_USBOTG_DATA4__USBOTG_DATA4,
+ MX31_PIN_USBOTG_DATA5__USBOTG_DATA5,
+ MX31_PIN_USBOTG_DATA6__USBOTG_DATA6,
+ MX31_PIN_USBOTG_DATA7__USBOTG_DATA7,
+ MX31_PIN_USBOTG_CLK__USBOTG_CLK,
+ MX31_PIN_USBOTG_DIR__USBOTG_DIR,
+ MX31_PIN_USBOTG_NXT__USBOTG_NXT,
+ MX31_PIN_USBOTG_STP__USBOTG_STP,
+ /* USB host 2 */
+ IOMUX_MODE(MX31_PIN_USBH2_CLK, IOMUX_CONFIG_FUNC),
+ IOMUX_MODE(MX31_PIN_USBH2_DIR, IOMUX_CONFIG_FUNC),
+ IOMUX_MODE(MX31_PIN_USBH2_NXT, IOMUX_CONFIG_FUNC),
+ IOMUX_MODE(MX31_PIN_USBH2_STP, IOMUX_CONFIG_FUNC),
+ IOMUX_MODE(MX31_PIN_USBH2_DATA0, IOMUX_CONFIG_FUNC),
+ IOMUX_MODE(MX31_PIN_USBH2_DATA1, IOMUX_CONFIG_FUNC),
+ IOMUX_MODE(MX31_PIN_STXD3, IOMUX_CONFIG_FUNC),
+ IOMUX_MODE(MX31_PIN_SRXD3, IOMUX_CONFIG_FUNC),
+ IOMUX_MODE(MX31_PIN_SCK3, IOMUX_CONFIG_FUNC),
+ IOMUX_MODE(MX31_PIN_SFS3, IOMUX_CONFIG_FUNC),
+ IOMUX_MODE(MX31_PIN_STXD6, IOMUX_CONFIG_FUNC),
+ IOMUX_MODE(MX31_PIN_SRXD6, IOMUX_CONFIG_FUNC),
};
+/* USB */
+#if defined(CONFIG_USB_ULPI)
+
+#define OTG_RESET IOMUX_TO_GPIO(MX31_PIN_STXD4)
+#define USBH2_RESET IOMUX_TO_GPIO(MX31_PIN_SCK6)
+#define USBH2_CS IOMUX_TO_GPIO(MX31_PIN_GPIO1_3)
+
+#define USB_PAD_CFG (PAD_CTL_DRV_MAX | PAD_CTL_SRE_FAST | PAD_CTL_HYS_CMOS | \
+ PAD_CTL_ODE_CMOS | PAD_CTL_100K_PU)
+
+static int usbotg_init(struct platform_device *pdev)
+{
+ int err;
+
+ mxc_iomux_set_pad(MX31_PIN_USBOTG_DATA0, USB_PAD_CFG);
+ mxc_iomux_set_pad(MX31_PIN_USBOTG_DATA1, USB_PAD_CFG);
+ mxc_iomux_set_pad(MX31_PIN_USBOTG_DATA2, USB_PAD_CFG);
+ mxc_iomux_set_pad(MX31_PIN_USBOTG_DATA3, USB_PAD_CFG);
+ mxc_iomux_set_pad(MX31_PIN_USBOTG_DATA4, USB_PAD_CFG);
+ mxc_iomux_set_pad(MX31_PIN_USBOTG_DATA5, USB_PAD_CFG);
+ mxc_iomux_set_pad(MX31_PIN_USBOTG_DATA6, USB_PAD_CFG);
+ mxc_iomux_set_pad(MX31_PIN_USBOTG_DATA7, USB_PAD_CFG);
+ mxc_iomux_set_pad(MX31_PIN_USBOTG_CLK, USB_PAD_CFG);
+ mxc_iomux_set_pad(MX31_PIN_USBOTG_DIR, USB_PAD_CFG);
+ mxc_iomux_set_pad(MX31_PIN_USBOTG_NXT, USB_PAD_CFG);
+ mxc_iomux_set_pad(MX31_PIN_USBOTG_STP, USB_PAD_CFG);
+
+ /* Chip already enabled by hardware */
+ /* OTG phy reset*/
+ err = gpio_request(OTG_RESET, "USB-OTG-RESET");
+ if (err) {
+ pr_err("Failed to request the usb otg reset gpio\n");
+ return err;
+ }
+
+ err = gpio_direction_output(OTG_RESET, 1/*HIGH*/);
+ if (err) {
+ pr_err("Failed to reset the usb otg phy\n");
+ goto otg_free_reset;
+ }
+
+ gpio_set_value(OTG_RESET, 0/*LOW*/);
+ mdelay(5);
+ gpio_set_value(OTG_RESET, 1/*HIGH*/);
+
+ return 0;
+
+otg_free_reset:
+ gpio_free(OTG_RESET);
+ return err;
+}
+
+static int usbh2_init(struct platform_device *pdev)
+{
+ int err;
+
+ mxc_iomux_set_pad(MX31_PIN_USBH2_CLK, USB_PAD_CFG);
+ mxc_iomux_set_pad(MX31_PIN_USBH2_DIR, USB_PAD_CFG);
+ mxc_iomux_set_pad(MX31_PIN_USBH2_NXT, USB_PAD_CFG);
+ mxc_iomux_set_pad(MX31_PIN_USBH2_STP, USB_PAD_CFG);
+ mxc_iomux_set_pad(MX31_PIN_USBH2_DATA0, USB_PAD_CFG);
+ mxc_iomux_set_pad(MX31_PIN_USBH2_DATA1, USB_PAD_CFG);
+ mxc_iomux_set_pad(MX31_PIN_SRXD6, USB_PAD_CFG);
+ mxc_iomux_set_pad(MX31_PIN_STXD6, USB_PAD_CFG);
+ mxc_iomux_set_pad(MX31_PIN_SFS3, USB_PAD_CFG);
+ mxc_iomux_set_pad(MX31_PIN_SCK3, USB_PAD_CFG);
+ mxc_iomux_set_pad(MX31_PIN_SRXD3, USB_PAD_CFG);
+ mxc_iomux_set_pad(MX31_PIN_STXD3, USB_PAD_CFG);
+
+ mxc_iomux_set_gpr(MUX_PGP_UH2, true);
+
+
+ /* Enable the chip */
+ err = gpio_request(USBH2_CS, "USB-H2-CS");
+ if (err) {
+ pr_err("Failed to request the usb host 2 CS gpio\n");
+ return err;
+ }
+
+ err = gpio_direction_output(USBH2_CS, 0/*Enabled*/);
+ if (err) {
+ pr_err("Failed to drive the usb host 2 CS gpio\n");
+ goto h2_free_cs;
+ }
+
+ /* H2 phy reset*/
+ err = gpio_request(USBH2_RESET, "USB-H2-RESET");
+ if (err) {
+ pr_err("Failed to request the usb host 2 reset gpio\n");
+ goto h2_free_cs;
+ }
+
+ err = gpio_direction_output(USBH2_RESET, 1/*HIGH*/);
+ if (err) {
+ pr_err("Failed to reset the usb host 2 phy\n");
+ goto h2_free_reset;
+ }
+
+ gpio_set_value(USBH2_RESET, 0/*LOW*/);
+ mdelay(5);
+ gpio_set_value(USBH2_RESET, 1/*HIGH*/);
+
+ return 0;
+
+h2_free_reset:
+ gpio_free(USBH2_RESET);
+h2_free_cs:
+ gpio_free(USBH2_CS);
+ return err;
+}
+
+static struct mxc_usbh_platform_data usbotg_pdata = {
+ .init = usbotg_init,
+ .portsc = MXC_EHCI_MODE_ULPI | MXC_EHCI_UTMI_8BIT,
+ .flags = MXC_EHCI_POWER_PINS_ENABLED | MXC_EHCI_INTERFACE_DIFF_UNI,
+};
+
+static struct mxc_usbh_platform_data usbh2_pdata = {
+ .init = usbh2_init,
+ .portsc = MXC_EHCI_MODE_ULPI | MXC_EHCI_UTMI_8BIT,
+ .flags = MXC_EHCI_POWER_PINS_ENABLED | MXC_EHCI_INTERFACE_DIFF_UNI,
+};
+#endif /* CONFIG_USB_ULPI */
+
/* RTC over I2C*/
#define ARMADILLO5X0_RTC_GPIO IOMUX_TO_GPIO(MX31_PIN_SRXD4)
@@ -393,6 +548,17 @@ static void __init armadillo5x0_init(void)
if (armadillo5x0_i2c_rtc.irq == 0)
pr_warning("armadillo5x0_init: failed to get RTC IRQ\n");
i2c_register_board_info(1, &armadillo5x0_i2c_rtc, 1);
+
+ /* USB */
+#if defined(CONFIG_USB_ULPI)
+ usbotg_pdata.otg = otg_ulpi_create(&mxc_ulpi_access_ops,
+ USB_OTG_DRV_VBUS | USB_OTG_DRV_VBUS_EXT);
+ usbh2_pdata.otg = otg_ulpi_create(&mxc_ulpi_access_ops,
+ USB_OTG_DRV_VBUS | USB_OTG_DRV_VBUS_EXT);
+
+ mxc_register_device(&mxc_otg_host, &usbotg_pdata);
+ mxc_register_device(&mxc_usbh2, &usbh2_pdata);
+#endif
}
static void __init armadillo5x0_timer_init(void)
--
1.6.3.3
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