[ARM] 4934/1: AT91CAP9 UDPHS driver: board and cpu integration.

This is patch 2 of 2 adding support for the USB High Speed Device Port
on the AT91CAP9 system on chip. The AT91CAP9 uses the same UDPHS IP
as the AVR32 and the AT91SAM9RL.

This patch declares the UDPHS ressources in the at91cap9 (cpu and
adk board) files, wires up the atmel_usba_udc driver to them,
and activates the driver in the defconfig.

Signed-off-by: Stelian Pop <stelian@popies.net>
Acked-by: Haavard Skinnemoen <hskinnemoen@atmel.com>
Acked-by: Andrew Victor <linux@maxim.org.za>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

2 files changed, 108 insertions, 0 deletions

diff --git a/arch/arm/mach-at91/at91cap9_devices.c b/arch/arm/mach-at91/at91cap9_devices.c
index be526746e01e..747b9dedab88 100644
--- a/arch/arm/mach-at91/at91cap9_devices.c
+++ b/arch/arm/mach-at91/at91cap9_devices.c
@@ -84,6 +84,105 @@ void __init at91_add_device_usbh(struct at91_usbh_data *data) {}
 
 
 /* --------------------------------------------------------------------
+ *  USB HS Device (Gadget)
+ * -------------------------------------------------------------------- */
+
+#if defined(CONFIG_USB_GADGET_ATMEL_USBA) || defined(CONFIG_USB_GADGET_ATMEL_USBA_MODULE)
+
+static struct resource usba_udc_resources[] = {
+        [0] = {
+                .start  = AT91CAP9_UDPHS_FIFO,
+                .end    = AT91CAP9_UDPHS_FIFO + SZ_512K - 1,
+                .flags  = IORESOURCE_MEM,
+        },
+        [1] = {
+                .start  = AT91CAP9_BASE_UDPHS,
+                .end    = AT91CAP9_BASE_UDPHS + SZ_1K - 1,
+                .flags  = IORESOURCE_MEM,
+        },
+        [2] = {
+                .start  = AT91CAP9_ID_UDPHS,
+                .end    = AT91CAP9_ID_UDPHS,
+                .flags  = IORESOURCE_IRQ,
+        },
+};
+
+#define EP(nam, idx, maxpkt, maxbk, dma, isoc)                  \
+        [idx] = {                                               \
+                .name           = nam,                          \
+                .index          = idx,                          \
+                .fifo_size      = maxpkt,                       \
+                .nr_banks       = maxbk,                        \
+                .can_dma        = dma,                          \
+                .can_isoc       = isoc,                         \
+        }
+
+static struct usba_ep_data usba_udc_ep[] = {
+        EP("ep0", 0,   64, 1, 0, 0),
+        EP("ep1", 1, 1024, 3, 1, 1),
+        EP("ep2", 2, 1024, 3, 1, 1),
+        EP("ep3", 3, 1024, 2, 1, 1),
+        EP("ep4", 4, 1024, 2, 1, 1),
+        EP("ep5", 5, 1024, 2, 1, 0),
+        EP("ep6", 6, 1024, 2, 1, 0),
+        EP("ep7", 7, 1024, 2, 0, 0),
+};
+
+#undef EP
+
+/*
+ * pdata doesn't have room for any endpoints, so we need to
+ * append room for the ones we need right after it.
+ */
+static struct {
+        struct usba_platform_data pdata;
+        struct usba_ep_data ep[8];
+} usba_udc_data;
+
+static struct platform_device at91_usba_udc_device = {
+        .name           = "atmel_usba_udc",
+        .id             = -1,
+        .dev            = {
+                                .platform_data  = &usba_udc_data.pdata,
+        },
+        .resource       = usba_udc_resources,
+        .num_resources  = ARRAY_SIZE(usba_udc_resources),
+};
+
+void __init at91_add_device_usba(struct usba_platform_data *data)
+{
+        at91_sys_write(AT91_MATRIX_UDPHS, AT91_MATRIX_SELECT_UDPHS |
+                                          AT91_MATRIX_UDPHS_BYPASS_LOCK);
+
+        /*
+         * Invalid pins are 0 on AT91, but the usba driver is shared
+         * with AVR32, which use negative values instead. Once/if
+         * gpio_is_valid() is ported to AT91, revisit this code.
+         */
+        usba_udc_data.pdata.vbus_pin = -EINVAL;
+        usba_udc_data.pdata.num_ep = ARRAY_SIZE(usba_udc_ep);
+        memcpy(usba_udc_data.ep, usba_udc_ep, sizeof(usba_udc_ep));;
+
+        if (data && data->vbus_pin > 0) {
+                at91_set_gpio_input(data->vbus_pin, 0);
+                at91_set_deglitch(data->vbus_pin, 1);
+                usba_udc_data.pdata.vbus_pin = data->vbus_pin;
+        }
+
+        /* Pullup pin is handled internally by USB device peripheral */
+
+        /* Clocks */
+        at91_clock_associate("utmi_clk", &at91_usba_udc_device.dev, "hclk");
+        at91_clock_associate("udphs_clk", &at91_usba_udc_device.dev, "pclk");
+
+        platform_device_register(&at91_usba_udc_device);
+}
+#else
+void __init at91_add_device_usba(struct usba_platform_data *data) {}
+#endif
+
+
+/* --------------------------------------------------------------------
  *  Ethernet
  * -------------------------------------------------------------------- */
 
diff --git a/arch/arm/mach-at91/board-cap9adk.c b/arch/arm/mach-at91/board-cap9adk.c
index e5512d1ff217..8a2a958639db 100644
--- a/arch/arm/mach-at91/board-cap9adk.c
+++ b/arch/arm/mach-at91/board-cap9adk.c
@@ -78,6 +78,12 @@ static struct at91_usbh_data __initdata cap9adk_usbh_data = {
         .ports          = 2,
 };
 
+/*
+ * USB HS Device port
+ */
+static struct usba_platform_data __initdata cap9adk_usba_udc_data = {
+        .vbus_pin       = AT91_PIN_PB31,
+};
 
 /*
  * ADS7846 Touchscreen
@@ -326,6 +332,9 @@ static void __init cap9adk_board_init(void)
         /* USB Host */
         set_irq_type(AT91CAP9_ID_UHP, IRQT_HIGH);
         at91_add_device_usbh(&cap9adk_usbh_data);
+        /* USB HS */
+        set_irq_type(AT91CAP9_ID_UDPHS, IRQT_HIGH);
+        at91_add_device_usba(&cap9adk_usba_udc_data);
         /* SPI */
         at91_add_device_spi(cap9adk_spi_devices, ARRAY_SIZE(cap9adk_spi_devices));
         /* Touchscreen */