[PATCH 10/12] at91: add ohci support
Jean-Christophe PLAGNIOL-VILLARD
plagnioj at jcrosoft.com
Mon Sep 19 08:15:47 EDT 2011
Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj at jcrosoft.com>
---
arch/arm/mach-at91/at91rm9200_devices.c | 18 ++++++
arch/arm/mach-at91/at91sam9260_devices.c | 13 ++++
arch/arm/mach-at91/at91sam9261_devices.c | 17 +++++
arch/arm/mach-at91/at91sam9263_devices.c | 25 ++++++++
arch/arm/mach-at91/at91sam9g45_devices.c | 25 ++++++++
arch/arm/mach-at91/include/mach/board.h | 7 ++
drivers/usb/host/Makefile | 1 +
drivers/usb/host/ohci-at91.c | 98 ++++++++++++++++++++++++++++++
8 files changed, 204 insertions(+), 0 deletions(-)
create mode 100644 drivers/usb/host/ohci-at91.c
diff --git a/arch/arm/mach-at91/at91rm9200_devices.c b/arch/arm/mach-at91/at91rm9200_devices.c
index 453c10a..bd7d3f0 100644
--- a/arch/arm/mach-at91/at91rm9200_devices.c
+++ b/arch/arm/mach-at91/at91rm9200_devices.c
@@ -26,6 +26,24 @@ void at91_add_device_sdram(u32 size)
}
/* --------------------------------------------------------------------
+ * USB Host
+ * -------------------------------------------------------------------- */
+
+#if defined(CONFIG_USB_OHCI)
+void __init at91_add_device_usbh_ohci(struct at91_usbh_data *data)
+{
+ if (!data)
+ return;
+
+ add_generic_device("at91_ohci", -1, NULL, AT91RM9200_UHP_BASE, 1024 * 1024,
+ IORESOURCE_MEM, data);
+}
+#else
+void __init at91_add_device_usbh_ohci(struct at91_usbh_data *data) {}
+#endif
+
+
+/* --------------------------------------------------------------------
* Ethernet
* -------------------------------------------------------------------- */
diff --git a/arch/arm/mach-at91/at91sam9260_devices.c b/arch/arm/mach-at91/at91sam9260_devices.c
index 4607646..7ffc97d 100644
--- a/arch/arm/mach-at91/at91sam9260_devices.c
+++ b/arch/arm/mach-at91/at91sam9260_devices.c
@@ -26,6 +26,19 @@ void at91_add_device_sdram(u32 size)
arm_add_mem_device("ram0", AT91_CHIPSELECT_1, size);
}
+#if defined(CONFIG_USB_OHCI)
+void __init at91_add_device_usbh_ohci(struct at91_usbh_data *data)
+{
+ if (!data)
+ return;
+
+ add_generic_device("at91_ohci", -1, NULL, AT91SAM9260_UHP_BASE, 1024 * 1024,
+ IORESOURCE_MEM, data);
+}
+#else
+void __init at91_add_device_usbh_ohci(struct at91_usbh_data *data) {}
+#endif
+
#if defined(CONFIG_DRIVER_NET_MACB)
void at91_add_device_eth(struct at91_ether_platform_data *data)
{
diff --git a/arch/arm/mach-at91/at91sam9261_devices.c b/arch/arm/mach-at91/at91sam9261_devices.c
index c6a3dba..3f69b18 100644
--- a/arch/arm/mach-at91/at91sam9261_devices.c
+++ b/arch/arm/mach-at91/at91sam9261_devices.c
@@ -26,6 +26,23 @@ void at91_add_device_sdram(u32 size)
arm_add_mem_device("ram0", AT91_CHIPSELECT_1, size);
}
+/* --------------------------------------------------------------------
+ * USB Host
+ * -------------------------------------------------------------------- */
+
+#if defined(CONFIG_USB_OHCI)
+void __init at91_add_device_usbh_ohci(struct at91_usbh_data *data)
+{
+ if (!data)
+ return;
+
+ add_generic_device("at91_ohci", -1, NULL, AT91SAM9261_UHP_BASE, 1024 * 1024,
+ IORESOURCE_MEM, data);
+}
+#else
+void __init at91_add_device_usbh_ohci(struct at91_usbh_data *data) {}
+#endif
+
#if defined(CONFIG_NAND_ATMEL)
void at91_add_device_nand(struct atmel_nand_data *data)
{
diff --git a/arch/arm/mach-at91/at91sam9263_devices.c b/arch/arm/mach-at91/at91sam9263_devices.c
index f5058dc..994a975 100644
--- a/arch/arm/mach-at91/at91sam9263_devices.c
+++ b/arch/arm/mach-at91/at91sam9263_devices.c
@@ -26,6 +26,31 @@ void at91_add_device_sdram(u32 size)
arm_add_mem_device("ram0", AT91_CHIPSELECT_1, size);
}
+/* --------------------------------------------------------------------
+ * USB Host
+ * -------------------------------------------------------------------- */
+
+#if defined(CONFIG_USB_OHCI)
+void __init at91_add_device_usbh_ohci(struct at91_usbh_data *data)
+{
+ int i;
+
+ if (!data)
+ return;
+
+ /* Enable VBus control for UHP ports */
+ for (i = 0; i < data->ports; i++) {
+ if (data->vbus_pin[i])
+ at91_set_gpio_output(data->vbus_pin[i], 0);
+ }
+
+ add_generic_device("at91_ohci", -1, NULL, AT91SAM9263_UHP_BASE, 1024 * 1024,
+ IORESOURCE_MEM, data);
+}
+#else
+void __init at91_add_device_usbh_ohci(struct at91_usbh_data *data) {}
+#endif
+
#if defined(CONFIG_DRIVER_NET_MACB)
void at91_add_device_eth(struct at91_ether_platform_data *data)
{
diff --git a/arch/arm/mach-at91/at91sam9g45_devices.c b/arch/arm/mach-at91/at91sam9g45_devices.c
index 8bc1104..a569542 100644
--- a/arch/arm/mach-at91/at91sam9g45_devices.c
+++ b/arch/arm/mach-at91/at91sam9g45_devices.c
@@ -26,6 +26,31 @@ void at91_add_device_sdram(u32 size)
arm_add_mem_device("ram0", AT91_CHIPSELECT_6, size);
}
+/* --------------------------------------------------------------------
+ * USB Host (OHCI)
+ * -------------------------------------------------------------------- */
+
+#if defined(CONFIG_USB_OHCI)
+void __init at91_add_device_usbh_ohci(struct at91_usbh_data *data)
+{
+ int i;
+
+ if (!data)
+ return;
+
+ /* Enable VBus control for UHP ports */
+ for (i = 0; i < data->ports; i++) {
+ if (data->vbus_pin[i])
+ at91_set_gpio_output(data->vbus_pin[i], 0);
+ }
+
+ add_generic_device("at91_ohci", -1, NULL, AT91SAM9G45_OHCI_BASE, 1024 * 1024,
+ IORESOURCE_MEM, data);
+}
+#else
+void __init at91_add_device_usbh_ohci(struct at91_usbh_data *data) {}
+#endif
+
#if defined(CONFIG_DRIVER_NET_MACB)
void at91_add_device_eth(struct at91_ether_platform_data *data)
{
diff --git a/arch/arm/mach-at91/include/mach/board.h b/arch/arm/mach-at91/include/mach/board.h
index f970ad8..546fe90 100644
--- a/arch/arm/mach-at91/include/mach/board.h
+++ b/arch/arm/mach-at91/include/mach/board.h
@@ -25,6 +25,13 @@
#include <spi/spi.h>
#include <linux/mtd/mtd.h>
+ /* USB Host */
+struct at91_usbh_data {
+ u8 ports; /* number of ports on root hub */
+ u8 vbus_pin[2]; /* port power-control pin */
+};
+extern void __init at91_add_device_usbh_ohci(struct at91_usbh_data *data);
+
void atmel_nand_load_image(void *dest, int size, int pagesize, int blocksize);
/* NAND / SmartMedia */
diff --git a/drivers/usb/host/Makefile b/drivers/usb/host/Makefile
index f1b1344..1c7e18f 100644
--- a/drivers/usb/host/Makefile
+++ b/drivers/usb/host/Makefile
@@ -1,3 +1,4 @@
obj-$(CONFIG_USB_EHCI) += ehci-hcd.o
obj-$(CONFIG_USB_EHCI_OMAP) += ehci-omap.o
obj-$(CONFIG_USB_OHCI) += ohci-hcd.o
+obj-$(CONFIG_ARCH_AT91) += ohci-at91.o
diff --git a/drivers/usb/host/ohci-at91.c b/drivers/usb/host/ohci-at91.c
new file mode 100644
index 0000000..cae049a
--- /dev/null
+++ b/drivers/usb/host/ohci-at91.c
@@ -0,0 +1,98 @@
+/*
+ * (C) Copyright 2010 Jean-Christophe PLAGNIOL-VILLARD <plagnioj at jcrosoft.com>
+ *
+ * See file CREDITS for list of people who contributed to this
+ * project.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; version 2 of
+ * the License.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
+ * MA 02111-1307 USA
+ */
+
+#include <common.h>
+#include <linux/clk.h>
+#include <driver.h>
+#include <init.h>
+#include <usb/usb.h>
+#include <usb/usb_defs.h>
+#include <errno.h>
+#include <asm/io.h>
+
+#include "ohci.h"
+
+/* interface and function clocks; sometimes also an AHB clock */
+static struct clk *iclk, *fclk;
+
+static void at91_start_clock(void)
+{
+ clk_enable(iclk);
+ clk_enable(fclk);
+}
+
+static void at91_stop_clock(void)
+{
+ clk_disable(fclk);
+ clk_disable(iclk);
+}
+
+static int at91_ohci_probe(struct device_d *dev)
+{
+ struct ohci_regs __iomem *regs = (struct ohci_regs __iomem *)dev->resource[0].start;
+
+ iclk = clk_get(NULL, "ohci_clk");
+ fclk = clk_get(NULL, "uhpck");
+
+ /*
+ * Start the USB clocks.
+ */
+ at91_start_clock();
+
+ /*
+ * The USB host controller must remain in reset.
+ */
+ writel(0, ®s->control);
+
+ add_generic_device("ohci", -1, NULL, dev->resource[0].start,
+ dev->resource[0].size, IORESOURCE_MEM, NULL);
+
+ return 0;
+}
+
+static void at91_ohci_remove(struct device_d *dev)
+{
+ struct ohci_regs __iomem *regs = (struct ohci_regs __iomem *)dev->resource[0].start;
+
+ /*
+ * Put the USB host controller into reset.
+ */
+ writel(0, ®s->control);
+
+ /*
+ * Stop the USB clocks.
+ */
+ at91_stop_clock();
+}
+
+static struct driver_d at91_ohci_driver = {
+ .name = "at91_ohci",
+ .probe = at91_ohci_probe,
+ .remove = at91_ohci_remove,
+};
+
+static int at91_ohci_init(void)
+{
+ register_driver(&at91_ohci_driver);
+ return 0;
+}
+device_initcall(at91_ohci_init);
--
1.7.5.4
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