[U-Boot] [PATCH 06/15] usb: ehci: ehci-marvell.c: Add Armada 3700 support (ARMv8)

[Stefan Roese]

This patch adds DM based support for the Armada 3700 EHCI controller.
The address windows don't need to get configured in this case. The
difference here is detected via DT compatible property at runtime.

With this support and the DM xHCI driver, both XHCI and eHCI can be
used simultaniously on the MVEBU boards now.

Signed-off-by: Stefan Roese <sr at denx.de>
Cc: Nadav Haklai <nadavh at marvell.com>
Cc: Kostya Porotchkin <kostap at marvell.com>
Cc: Wilson Ding <dingwei at marvell.com>
Cc: Victor Gu <xigu at marvell.com>
Cc: Hua Jing <jinghua at marvell.com>
Cc: Terry Zhou <bjzhou at marvell.com>
Cc: Hanna Hawa <hannah at marvell.com>
Cc: Haim Boot <hayim at marvell.com>
Cc: Marek Vasut <marex at denx.de>
---
 drivers/usb/host/ehci-marvell.c | 59 ++++++++++++++++++++++++++++++++++++-----
 1 file changed, 52 insertions(+), 7 deletions(-)

diff --git a/drivers/usb/host/ehci-marvell.c b/drivers/usb/host/ehci-marvell.c
index 5b0f46a..72b9b30 100644
--- a/drivers/usb/host/ehci-marvell.c
+++ b/drivers/usb/host/ehci-marvell.c
@@ -26,6 +26,16 @@ DECLARE_GLOBAL_DATA_PTR;
 #define USB_WINDOW_BASE(i)	(0x324 + ((i) << 4))
 #define USB_TARGET_DRAM		0x0
 
+#define USB2_SBUSCFG_OFF	0x90
+
+#define USB_SBUSCFG_BAWR_OFF	0x6
+#define USB_SBUSCFG_BARD_OFF	0x3
+#define USB_SBUSCFG_AHBBRST_OFF	0x0
+
+#define USB_SBUSCFG_BAWR_ALIGN_64B	0x4
+#define USB_SBUSCFG_BARD_ALIGN_64B	0x4
+#define USB_SBUSCFG_AHBBRST_INCR16	0x7
+
 /*
  * USB 2.0 Bridge Address Decoding registers setup
  */
@@ -41,7 +51,7 @@ struct ehci_mvebu_priv {
  * to the common mvebu archticture including the mbus setup, this
  * will be the only function needed to configure the access windows
  */
-static void usb_brg_adrdec_setup(u32 base)
+static void usb_brg_adrdec_setup(void *base)
 {
 	const struct mbus_dram_target_info *dram;
 	int i;
@@ -66,6 +76,29 @@ static void usb_brg_adrdec_setup(u32 base)
 	}
 }
 
+static void marvell_ehci_powerup_fixup(struct ehci_ctrl *ctrl,
+				       uint32_t *status_reg, uint32_t *reg)
+{
+	struct ehci_mvebu_priv *priv = ctrl->priv;
+
+	/*
+	 * Set default value for reg SBUSCFG, which is Control for the AMBA
+	 * system bus interface:
+	 * BAWR = BARD = 4 : Align rd/wr bursts packets larger than 64 bytes
+	 * AHBBRST = 7     : Align AHB burst for packets larger than 64 bytes
+	 */
+	writel((USB_SBUSCFG_BAWR_ALIGN_64B << USB_SBUSCFG_BAWR_OFF) |
+	       (USB_SBUSCFG_BARD_ALIGN_64B << USB_SBUSCFG_BARD_OFF) |
+	       (USB_SBUSCFG_AHBBRST_INCR16 << USB_SBUSCFG_AHBBRST_OFF),
+	       priv->hcd_base + USB2_SBUSCFG_OFF);
+
+	mdelay(50);
+}
+
+static struct ehci_ops marvell_ehci_ops = {
+	.powerup_fixup	= NULL,
+};
+
 static int ehci_mvebu_probe(struct udevice *dev)
 {
 	struct ehci_mvebu_priv *priv = dev_get_priv(dev);
@@ -81,17 +114,28 @@ static int ehci_mvebu_probe(struct udevice *dev)
 		return -ENXIO;
 	}
 
-	usb_brg_adrdec_setup(priv->hcd_base);
+	/*
+	 * For SoCs without hlock like Armada3700 we need to program the sbuscfg
+	 * reg to guarantee AHB master's burst will not overrun or underrun
+	 * the FIFO. Otherwise all USB2 write option will fail.
+	 * Also, the address decoder doesn't need to get setup with this
+	 * SoC, so don't call usb_brg_adrdec_setup().
+	 */
+	if (of_device_is_compatible(dev, "marvell,armada3700-ehci"))
+		marvell_ehci_ops.powerup_fixup = marvell_ehci_powerup_fixup;
+	else
+		usb_brg_adrdec_setup((void *)priv->hcd_base);
 
 	hccr = (struct ehci_hccr *)(priv->hcd_base + 0x100);
 	hcor = (struct ehci_hcor *)
-		((u32)hccr + HC_LENGTH(ehci_readl(&hccr->cr_capbase)));
+		((uintptr_t)hccr + HC_LENGTH(ehci_readl(&hccr->cr_capbase)));
 
-	debug("ehci-marvell: init hccr %x and hcor %x hc_length %d\n",
-	      (u32)hccr, (u32)hcor,
-	      (u32)HC_LENGTH(ehci_readl(&hccr->cr_capbase)));
+	debug("ehci-marvell: init hccr %lx and hcor %lx hc_length %ld\n",
+	      (uintptr_t)hccr, (uintptr_t)hcor,
+	      (uintptr_t)HC_LENGTH(ehci_readl(&hccr->cr_capbase)));
 
-	return ehci_register(dev, hccr, hcor, NULL, 0, USB_INIT_HOST);
+	return ehci_register(dev, hccr, hcor, &marvell_ehci_ops, 0,
+			     USB_INIT_HOST);
 }
 
 static int ehci_mvebu_remove(struct udevice *dev)
@@ -107,6 +151,7 @@ static int ehci_mvebu_remove(struct udevice *dev)
 
 static const struct udevice_id ehci_usb_ids[] = {
 	{ .compatible = "marvell,orion-ehci", },
+	{ .compatible = "marvell,armada3700-ehci", },
 	{ }
 };
 
-- 
2.9.3