Hello.
On 19-05-2014 14:08, Yoshihiro Shimoda wrote:
The R-Car H2 and M2 SoCs come with an xHCI controller that requires
some specific initilization related to the firmware downloading and
some specific registers. This patch adds the support for this special
configuration as an xHCI quirk executed during probe and start.
Signed-off-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@xxxxxxxxxxx>
[...]
diff --git a/drivers/usb/host/xhci-plat.c b/drivers/usb/host/xhci-plat.c
index 561d07e..3a2da1f 100644
--- a/drivers/usb/host/xhci-plat.c
+++ b/drivers/usb/host/xhci-plat.c
@@ -20,6 +20,7 @@
#include "xhci.h"
#include "xhci-mvebu.h"
+#include "xhci-rcar.h"
static void xhci_plat_quirks(struct device *dev, struct xhci_hcd *xhci)
{
@@ -39,6 +40,12 @@ static int xhci_plat_setup(struct usb_hcd *hcd)
static int xhci_plat_start(struct usb_hcd *hcd)
{
+ struct device_node *of_node = hcd->self.controller->of_node;
+
+ if (of_device_is_compatible(of_node, "renesas,r8a7790-xhci") ||
+ of_device_is_compatible(of_node, "renesas,r8a7790-xhci"))
Perhaps "renesas,r8a7791-xhci"?
+ xhci_rcar_start(hcd);
+
return xhci_run(hcd);
}
[...]
diff --git a/drivers/usb/host/xhci-rcar.c b/drivers/usb/host/xhci-rcar.c
new file mode 100644
index 0000000..3c0bfae
--- /dev/null
+++ b/drivers/usb/host/xhci-rcar.c
@@ -0,0 +1,182 @@
+/*
+ * xHCI host controller driver for R-Car SoCs
+ *
+ * Copyright (C) 2014 Renesas Electronics Corporation
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * version 2 as published by the Free Software Foundation.
+ */
+
+#include <linux/firmware.h>
+#include <linux/module.h>
+#include <linux/platform_device.h>
+#include <linux/usb/phy.h>
+
+#include "xhci.h"
+#include "xhci-rcar.h"
+
+#define FIRMWARE_NAME "r8a779x_usb3_v1.dlmem"
+
+/*** Register Offset ***/
+#define RCAR_USB3_INT_ENA 0x224 /* Interrupt Enable */
+#define RCAR_USB3_DL_CTRL 0x250 /* FW Download Control & Status */
+#define RCAR_USB3_FW_DATA0 0x258 /* FW Data0 */
+
+#define RCAR_USB3_LCLK 0xa44 /* LCLK Select */
+#define RCAR_USB3_CONF1 0xa48 /* USB3.0 Configuration1 */
+#define RCAR_USB3_CONF2 0xa5c /* USB3.0 Configuration2 */
+#define RCAR_USB3_CONF3 0xaa8 /* USB3.0 Configuration3 */
+#define RCAR_USB3_RX_POL 0xab0 /* USB3.0 RX Polarity */
+#define RCAR_USB3_TX_POL 0xab8 /* USB3.0 TX Polarity */
+
+/*** Register Settings ***/
+/* Interrupt Enable */
+#define RCAR_USB3_INT_XHC_ENA 0x00000001
+#define RCAR_USB3_INT_PME_ENA 0x00000002
+#define RCAR_USB3_INT_HSE_ENA 0x00000004
+#define RCAR_USB3_INT_ENA_VAL (RCAR_USB3_INT_XHC_ENA | \
+ RCAR_USB3_INT_PME_ENA | RCAR_USB3_INT_HSE_ENA)
+
+/* FW Download Control & Status */
+#define RCAR_USB3_DL_CTRL 0x250
Already #define'd.
+/* USB3.0 Configuraion */
Configuration.
+int xhci_rcar_start(struct usb_hcd *hcd)
+{
+ if (hcd->regs != NULL) {
+ u32 temp;
Need empty line here... and should perhaps return error if hcd->regs NULL?
+ /* Interrupt Enable */
+ temp = readl(hcd->regs + RCAR_USB3_INT_ENA);
+ temp |= RCAR_USB3_INT_ENA_VAL;
+ writel(temp, hcd->regs + RCAR_USB3_INT_ENA);
+ /* LCLK Select */
+ writel(RCAR_USB3_LCLK_ENA_VAL, hcd->regs + RCAR_USB3_LCLK);
+ /* USB3.0 Configuration */
+ writel(RCAR_USB3_CONF1_VAL, hcd->regs + RCAR_USB3_CONF1);
+ writel(RCAR_USB3_CONF2_VAL, hcd->regs + RCAR_USB3_CONF2);
+ writel(RCAR_USB3_CONF3_VAL, hcd->regs + RCAR_USB3_CONF3);
+ /* USB3.0 Polariy */
+ writel(RCAR_USB3_RX_POL_VAL, hcd->regs + RCAR_USB3_RX_POL);
+ writel(RCAR_USB3_TX_POL_VAL, hcd->regs + RCAR_USB3_TX_POL);
+ }
+
+ return 0;
+}
[...]
WBR, Sergei
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