ARM: mach-shmobile: mackerel: add renesas_usbhs support for USB1

renesas_usbhs driver can use external interrupt mode
(which come from USB-PHY) or autonomy mode (it use own interrupt)
for detecting connection/disconnection when Function.
And it will be power OFF while it has been disconnecting
if external interrupt mode is selected.

mackerel board has 2 USB ports.

But we can not use external interrupt mode
on CN22 USB0 port which is only for USB Function.
IRQ7-PORT40 is already used by Touchscreen,
and USB-PHY needs IRQ7-PORT167.
It is impossible to use IRQ7 demux on mackerel.

We can use external interrupt mode USB-Function on "USB1".
USB1 can become Host by r8a66597, and become Function by renesas_usbhs.
But don't select both drivers in same time.
These 2 drivers are not supporting IRQ SHARD.

Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>

1 files changed, 190 insertions, 1 deletions

diff --git a/arch/arm/mach-shmobile/board-mackerel.c b/arch/arm/mach-shmobile/board-mackerel.c
index 0d882754bff..448ddbe4333 100644
--- a/arch/arm/mach-shmobile/board-mackerel.c
+++ b/arch/arm/mach-shmobile/board-mackerel.c
@@ -43,6 +43,7 @@
 #include <linux/sh_intc.h>
 #include <linux/tca6416_keypad.h>
 #include <linux/usb/r8a66597.h>
+#include <linux/usb/renesas_usbhs.h>
 
 #include <video/sh_mobile_hdmi.h>
 #include <video/sh_mobile_lcdc.h>
@@ -143,7 +144,30 @@
  * open      | external VBUS | Function
  *
  * *1
- * CN31 is used as Host in Linux.
+ * CN31 is used as
+ * CONFIG_USB_R8A66597_HCD      Host
+ * CONFIG_USB_RENESAS_USBHS     Function
+ *
+ * CAUTION
+ *
+ * renesas_usbhs driver can use external interrupt mode
+ * (which come from USB-PHY) or autonomy mode (it use own interrupt)
+ * for detecting connection/disconnection when Function.
+ * USB will be power OFF while it has been disconnecting
+ * if external interrupt mode, and it is always power ON if autonomy mode,
+ *
+ * mackerel can not use external interrupt (IRQ7-PORT167) mode on "USB0",
+ * because Touchscreen is using IRQ7-PORT40.
+ * It is impossible to use IRQ7 demux on this board.
+ *
+ * We can use external interrupt mode USB-Function on "USB1".
+ * USB1 can become Host by r8a66597, and become Function by renesas_usbhs.
+ * But don't select both drivers in same time.
+ * These uses same IRQ number for request_irq(), and aren't supporting
+ * IRQF_SHARD / IORESOURCE_IRQ_SHAREABLE.
+ *
+ * Actually these are old/new version of USB driver.
+ * This mean its register will be broken if it supports SHARD IRQ,
  */
 
 /*
@@ -185,6 +209,7 @@
  * FIXME !!
  *
  * gpio_no_direction
+ * gpio_pull_down
  * are quick_hack.
  *
  * current gpio frame work doesn't have
@@ -196,6 +221,16 @@ static void __init gpio_no_direction(u32 addr)
         __raw_writeb(0x00, addr);
 }
 
+static void __init gpio_pull_down(u32 addr)
+{
+        u8 data = __raw_readb(addr);
+
+        data &= 0x0F;
+        data |= 0xA0;
+
+        __raw_writeb(data, addr);
+}
+
 /* MTD */
 static struct mtd_partition nor_flash_partitions[] = {
         {
@@ -509,6 +544,157 @@ static struct platform_device usb1_host_device = {
         .resource       = usb1_host_resources,
 };
 
+/* USB1 (Function) */
+#define USB_PHY_MODE            (1 << 4)
+#define USB_PHY_INT_EN          ((1 << 3) | (1 << 2))
+#define USB_PHY_ON              (1 << 1)
+#define USB_PHY_OFF             (1 << 0)
+#define USB_PHY_INT_CLR         (USB_PHY_ON | USB_PHY_OFF)
+
+struct usbhs_private {
+        unsigned int irq;
+        unsigned int usbphyaddr;
+        unsigned int usbcrcaddr;
+        struct renesas_usbhs_platform_info info;
+};
+
+#define usbhs_get_priv(pdev)                            \
+        container_of(renesas_usbhs_get_info(pdev),      \
+                     struct usbhs_private, info)
+
+#define usbhs_is_connected(priv)                        \
+        (!((1 << 7) & __raw_readw(priv->usbcrcaddr)))
+
+static int usbhs1_get_id(struct platform_device *pdev)
+{
+        return USBHS_GADGET;
+}
+
+static int usbhs1_get_vbus(struct platform_device *pdev)
+{
+        return usbhs_is_connected(usbhs_get_priv(pdev));
+}
+
+static irqreturn_t usbhs1_interrupt(int irq, void *data)
+{
+        struct platform_device *pdev = data;
+        struct usbhs_private *priv = usbhs_get_priv(pdev);
+
+        dev_dbg(&pdev->dev, "%s\n", __func__);
+
+        renesas_usbhs_call_notify_hotplug(pdev);
+
+        /* clear status */
+        __raw_writew(__raw_readw(priv->usbphyaddr) | USB_PHY_INT_CLR,
+                     priv->usbphyaddr);
+
+        return IRQ_HANDLED;
+}
+
+static int usbhs1_hardware_init(struct platform_device *pdev)
+{
+        struct usbhs_private *priv = usbhs_get_priv(pdev);
+        int ret;
+
+        irq_set_irq_type(priv->irq, IRQ_TYPE_LEVEL_HIGH);
+
+        /* clear interrupt status */
+        __raw_writew(USB_PHY_MODE | USB_PHY_INT_CLR, priv->usbphyaddr);
+
+        ret = request_irq(priv->irq, usbhs1_interrupt, 0,
+                          dev_name(&pdev->dev), pdev);
+        if (ret) {
+                dev_err(&pdev->dev, "request_irq err\n");
+                return ret;
+        }
+
+        /* enable USB phy interrupt */
+        __raw_writew(USB_PHY_MODE | USB_PHY_INT_EN, priv->usbphyaddr);
+
+        return 0;
+}
+
+static void usbhs1_hardware_exit(struct platform_device *pdev)
+{
+        struct usbhs_private *priv = usbhs_get_priv(pdev);
+
+        /* clear interrupt status */
+        __raw_writew(USB_PHY_MODE | USB_PHY_INT_CLR, priv->usbphyaddr);
+
+        free_irq(priv->irq, pdev);
+}
+
+static void usbhs1_phy_reset(struct platform_device *pdev)
+{
+        struct usbhs_private *priv = usbhs_get_priv(pdev);
+
+        /* init phy */
+        __raw_writew(0x8a0a, priv->usbcrcaddr);
+}
+
+static u32 usbhs1_pipe_cfg[] = {
+        USB_ENDPOINT_XFER_CONTROL,
+        USB_ENDPOINT_XFER_ISOC,
+        USB_ENDPOINT_XFER_ISOC,
+        USB_ENDPOINT_XFER_BULK,
+        USB_ENDPOINT_XFER_BULK,
+        USB_ENDPOINT_XFER_BULK,
+        USB_ENDPOINT_XFER_INT,
+        USB_ENDPOINT_XFER_INT,
+        USB_ENDPOINT_XFER_INT,
+        USB_ENDPOINT_XFER_BULK,
+        USB_ENDPOINT_XFER_BULK,
+        USB_ENDPOINT_XFER_BULK,
+        USB_ENDPOINT_XFER_BULK,
+        USB_ENDPOINT_XFER_BULK,
+        USB_ENDPOINT_XFER_BULK,
+        USB_ENDPOINT_XFER_BULK,
+};
+
+static struct usbhs_private usbhs1_private = {
+        .irq            = evt2irq(0x0300),      /* IRQ8 */
+        .usbphyaddr     = 0xE60581E2,           /* USBPHY1INTAP */
+        .usbcrcaddr     = 0xE6058130,           /* USBCR4 */
+        .info = {
+                .platform_callback = {
+                        .hardware_init  = usbhs1_hardware_init,
+                        .hardware_exit  = usbhs1_hardware_exit,
+                        .phy_reset      = usbhs1_phy_reset,
+                        .get_id         = usbhs1_get_id,
+                        .get_vbus       = usbhs1_get_vbus,
+                },
+                .driver_param = {
+                        .buswait_bwait  = 4,
+                        .pipe_type      = usbhs1_pipe_cfg,
+                        .pipe_size      = ARRAY_SIZE(usbhs1_pipe_cfg),
+                },
+        },
+};
+
+static struct resource usbhs1_resources[] = {
+        [0] = {
+                .name   = "USBHS",
+                .start  = 0xE68B0000,
+                .end    = 0xE68B00E6 - 1,
+                .flags  = IORESOURCE_MEM,
+        },
+        [1] = {
+                .start  = evt2irq(0x1ce0) /* USB1_USB1I0 */,
+                .flags  = IORESOURCE_IRQ,
+        },
+};
+
+static struct platform_device usbhs1_device = {
+        .name   = "renesas_usbhs",
+        .id     = 1,
+        .dev = {
+                .platform_data          = &usbhs1_private.info,
+        },
+        .num_resources  = ARRAY_SIZE(usbhs1_resources),
+        .resource       = usbhs1_resources,
+};
+
+
 /* LED */
 static struct gpio_led mackerel_leds[] = {
         {
@@ -949,6 +1135,7 @@ static struct platform_device *mackerel_devices[] __initdata = {
         &smc911x_device,
         &lcdc_device,
         &usb1_host_device,
+        &usbhs1_device,
         &leds_device,
         &fsi_device,
         &fsi_ak4643_device,
@@ -1044,6 +1231,7 @@ static void __init mackerel_map_io(void)
 
 #define GPIO_PORT9CR    0xE6051009
 #define GPIO_PORT10CR   0xE605100A
+#define GPIO_PORT168CR  0xE60520A8
 #define SRCR4           0xe61580bc
 #define USCCR1          0xE6058144
 static void __init mackerel_init(void)
@@ -1102,6 +1290,7 @@ static void __init mackerel_init(void)
         gpio_request(GPIO_FN_OVCN_1_114, NULL);
         gpio_request(GPIO_FN_EXTLP_1,    NULL);
         gpio_request(GPIO_FN_OVCN2_1,    NULL);
+        gpio_pull_down(GPIO_PORT168CR);
 
         /* setup USB phy */
         __raw_writew(0x8a0a, 0xE6058130);       /* USBCR4 */