[U-Boot] [PATCH 5/5] WIP: sunxi: Start of driver model USB implementation

[Simon Glass]

This just has a few starting points. Work remaining:

- Get GPIOs from the device tree correctly, and claim them
- Perhaps create a USB phy class and driver for sunxi
- Perhaps allow USB ports to be specified by some sort of peripherals ID
   instead of an index?

Signed-off-by: Simon Glass <sjg at chromium.org>
---

 drivers/usb/host/ehci-sunxi.c | 71 +++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 71 insertions(+)

diff --git a/drivers/usb/host/ehci-sunxi.c b/drivers/usb/host/ehci-sunxi.c
index eda9f69..5b92edf 100644
--- a/drivers/usb/host/ehci-sunxi.c
+++ b/drivers/usb/host/ehci-sunxi.c
@@ -11,8 +11,15 @@
 
 #include <asm/arch/usbc.h>
 #include <common.h>
+#include <asm/gpio.h>
 #include "ehci.h"
 
+struct ehci_sunxi_priv {
+	struct gpio_desc vbus_gpio;
+};
+
+#ifndef CONFIG_DM_USB
+
 int ehci_hcd_init(int index, enum usb_init_type init, struct ehci_hccr **hccr,
 		struct ehci_hcor **hcor)
 {
@@ -44,3 +51,67 @@ int ehci_hcd_stop(int index)
 
 	return sunxi_usbc_free_resources(index + 1);
 }
+#endif
+
+#ifdef CONFIG_DM_USB
+static int ehci_usb_ofdata_to_platdata(struct udevice *dev)
+{
+	return 0;
+}
+
+static int ehci_usb_probe(struct udevice *dev)
+{
+	struct usb_platdata *plat = dev_get_platdata(dev);
+	struct ehci_sunxi_priv *priv = dev_get_priv(dev);
+	struct ehci_hccr *hccr;
+	struct ehci_hcor *hcor;
+	static bool clk_done;
+	int ret;
+
+	/* TODO: Need to get this from the correct node */
+	ret = gpio_request_by_name(dev, "gpio", &priv->vbus_gpio, GPIOD_IS_OUT);
+	if (ret)
+		return ret;
+
+	hccr = (struct ehci_hccr *)&priv->reg->cap_length;
+	hcor = (struct ehci_hcor *)&priv->reg->usb_cmd;
+	if (!clk_done) {
+		config_clock(get_pll_timing(&fdt_usb_controllers[priv->type]));
+		clk_done = true;
+	}
+
+	return ehci_register(dev, hccr, hcor, &tegra_ehci_ops, 0,
+			     plat->init_type);
+}
+
+static int ehci_usb_remove(struct udevice *dev)
+{
+	int ret;
+
+	ret = ehci_deregister(dev);
+	if (ret)
+		return ret;
+
+	/* TODO: free GPIOs */
+
+	return 0;
+}
+
+static const struct udevice_id ehci_usb_ids[] = {
+	{ .compatible = "allwinner,sun7i-a20-ehci", },
+	{ }
+};
+
+U_BOOT_DRIVER(usb_ehci) = {
+	.name	= "ehci_sunxi",
+	.id	= UCLASS_USB,
+	.of_match = ehci_usb_ids,
+	.ofdata_to_platdata = ehci_usb_ofdata_to_platdata,
+	.probe = ehci_usb_probe,
+	.remove = ehci_usb_remove,
+	.ops	= &ehci_usb_ops,
+	.platdata_auto_alloc_size = sizeof(struct usb_platdata),
+	.priv_auto_alloc_size = sizeof(struct ehci_sunxi_priv),
+	.flags	= DM_FLAG_ALLOC_PRIV_DMA,
+};
+#endif
-- 
2.2.0.rc0.207.ga3a616c