[U-Boot,v3,2/2] drivers: usb: host: Add BRCM xHCI driver
diff mbox series

Message ID 20191126184136.17370-3-vladimir.olovyannikov@broadcom.com
State New
Delegated to: Marek Vasut
Headers show
Series
  • Add Broadcom XHCI driver for iproc platforms
Related show

Commit Message

Vladimir Olovyannikov Nov. 26, 2019, 6:41 p.m. UTC
From: Bharat Kumar Reddy Gooty <bharat.gooty@broadcom.com>

Base driver for Broadcom xHCI controllers

Signed-off-by: Bharat Kumar Reddy Gooty <bharat.gooty@broadcom.com>
Signed-off-by: Vladimir Olovyannikov <vladimir.olovyannikov@broadcom.com>
---
 drivers/usb/host/Kconfig     |   8 +++
 drivers/usb/host/Makefile    |   1 +
 drivers/usb/host/xhci-brcm.c | 105 +++++++++++++++++++++++++++++++++++
 3 files changed, 114 insertions(+)
 create mode 100644 drivers/usb/host/xhci-brcm.c

Comments

Marek Vasut Nov. 27, 2019, 8:42 a.m. UTC | #1
On 11/26/19 7:41 PM, Vladimir Olovyannikov wrote:
Hi,

[...]

> +#define USBAXI_AWCACHE		0xF
> +#define USBAXI_ARCACHE		0xF
> +#define USBAXI_AWPROT		0x8
> +#define USBAXI_ARPROT		0x8
> +#define USBAXIWR_SA_VAL		((USBAXI_AWCACHE << 4) | USBAXI_AWPROT)
> +#define USBAXIWR_SA_MASK	0xFF
> +#define USBAXIWR_UA_VAL		(((USBAXI_AWCACHE << 4) | USBAXI_AWPROT) << 16)

Maybe you can do "#define USBAXIWR_UA_VAL (USBAXIWR_SA_VAL << 16)" here?

> +#define USBAXIWR_UA_MASK	(0xFF << 16)
> +#define USBAXIRD_SA_VAL		((USBAXI_ARCACHE << 4) | USBAXI_ARPROT)
> +#define USBAXIRD_SA_MASK	0xFF
> +#define USBAXIRD_UA_VAL		(((USBAXI_ARCACHE << 4) | USBAXI_ARPROT) << 16)

And here too ?

> +#define USBAXIRD_UA_MASK	(0xFF << 16)

The masks are the same for RD and WR, maybe it makes sense to unify them
into one set of masks ?

> +struct brcm_xhci_platdata {
> +	unsigned int arcache;
> +	unsigned int awcache;
> +};
> +
> +static int xhci_brcm_probe(struct udevice *dev)
> +{
> +	struct xhci_hccr *hcd;
> +	struct xhci_hcor *hcor;
> +	struct brcm_xhci_platdata *plat = dev_get_platdata(dev);
> +	uintptr_t hc_base;
> +	int len, ret = 0;
> +
> +	if (!plat) {
> +		dev_err(dev, "Can't get xHCI Plat data\n");
> +		return -ENOMEM;
> +	}
> +
> +	hcd = dev_read_addr_ptr(dev);
> +	if (!hcd) {
> +		dev_err(dev, "Can't get the xHCI register base address\n");
> +		return -ENXIO;
> +	}
> +
> +	hc_base = (uintptr_t)hcd;
> +	len = HC_LENGTH(xhci_readl(&hcd->cr_capbase));
> +	hcor = (struct xhci_hcor *)(hc_base + len);
> +
> +	/* Save the default values of AXI read and write attributes */
> +	plat->awcache = readl(hc_base + DRD2U3H_XHC_REGS_AXIWRA);
> +	plat->arcache = readl(hc_base + DRD2U3H_XHC_REGS_AXIRDA);
> +
> +	/* Enable AXI read and write attributes. */
> +	clrsetbits_le32((hc_base + DRD2U3H_XHC_REGS_AXIWRA),                        ^
            This one is unnecessary too. Please fix them globally.


> +			(USBAXIWR_UA_MASK | USBAXIWR_SA_MASK),

Here

> +			(USBAXIWR_UA_VAL | USBAXIWR_SA_VAL));

Here

> +	clrsetbits_le32((hc_base + DRD2U3H_XHC_REGS_AXIRDA),

Here

> +			(USBAXIRD_UA_MASK | USBAXIRD_SA_MASK),

Here

> +			(USBAXIRD_UA_VAL | USBAXIRD_SA_VAL));

And here

[...]

Patch
diff mbox series

diff --git a/drivers/usb/host/Kconfig b/drivers/usb/host/Kconfig
index 0987ff25b1..94ac969058 100644
--- a/drivers/usb/host/Kconfig
+++ b/drivers/usb/host/Kconfig
@@ -88,6 +88,14 @@  config USB_XHCI_FSL
 	depends on !SPL_NO_USB
 	help
 	  Enables support for the on-chip xHCI controller on NXP Layerscape SoCs.
+
+config USB_XHCI_BRCM
+	bool "Broadcom USB3 Host XHCI controller"
+	depends on DM_USB
+	help
+	  USB controller based on the Broadcom USB3 IP Core.
+	  Supports USB2/3 functionality.
+
 endif # USB_XHCI_HCD
 
 config USB_EHCI_HCD
diff --git a/drivers/usb/host/Makefile b/drivers/usb/host/Makefile
index 7feeff679c..b62f346094 100644
--- a/drivers/usb/host/Makefile
+++ b/drivers/usb/host/Makefile
@@ -44,6 +44,7 @@  obj-$(CONFIG_USB_EHCI_RMOBILE) += ehci-rmobile.o
 obj-$(CONFIG_USB_EHCI_ZYNQ) += ehci-zynq.o
 
 # xhci
+obj-$(CONFIG_USB_XHCI_BRCM) += xhci-brcm.o
 obj-$(CONFIG_USB_XHCI_HCD) += xhci.o xhci-mem.o xhci-ring.o
 obj-$(CONFIG_USB_XHCI_DWC3) += xhci-dwc3.o
 obj-$(CONFIG_USB_XHCI_DWC3_OF_SIMPLE) += dwc3-of-simple.o
diff --git a/drivers/usb/host/xhci-brcm.c b/drivers/usb/host/xhci-brcm.c
new file mode 100644
index 0000000000..c53c93209e
--- /dev/null
+++ b/drivers/usb/host/xhci-brcm.c
@@ -0,0 +1,105 @@ 
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Copyright (C) 2019 Broadcom.
+ */
+
+#include <common.h>
+#include <dm.h>
+#include <fdtdec.h>
+#include <usb.h>
+#include <asm/io.h>
+#include "xhci.h"
+
+#define DRD2U3H_XHC_REGS_AXIWRA	0xC08
+#define DRD2U3H_XHC_REGS_AXIRDA	0xC0C
+
+#define USBAXI_AWCACHE		0xF
+#define USBAXI_ARCACHE		0xF
+#define USBAXI_AWPROT		0x8
+#define USBAXI_ARPROT		0x8
+#define USBAXIWR_SA_VAL		((USBAXI_AWCACHE << 4) | USBAXI_AWPROT)
+#define USBAXIWR_SA_MASK	0xFF
+#define USBAXIWR_UA_VAL		(((USBAXI_AWCACHE << 4) | USBAXI_AWPROT) << 16)
+#define USBAXIWR_UA_MASK	(0xFF << 16)
+#define USBAXIRD_SA_VAL		((USBAXI_ARCACHE << 4) | USBAXI_ARPROT)
+#define USBAXIRD_SA_MASK	0xFF
+#define USBAXIRD_UA_VAL		(((USBAXI_ARCACHE << 4) | USBAXI_ARPROT) << 16)
+#define USBAXIRD_UA_MASK	(0xFF << 16)
+
+struct brcm_xhci_platdata {
+	unsigned int arcache;
+	unsigned int awcache;
+};
+
+static int xhci_brcm_probe(struct udevice *dev)
+{
+	struct xhci_hccr *hcd;
+	struct xhci_hcor *hcor;
+	struct brcm_xhci_platdata *plat = dev_get_platdata(dev);
+	uintptr_t hc_base;
+	int len, ret = 0;
+
+	if (!plat) {
+		dev_err(dev, "Can't get xHCI Plat data\n");
+		return -ENOMEM;
+	}
+
+	hcd = dev_read_addr_ptr(dev);
+	if (!hcd) {
+		dev_err(dev, "Can't get the xHCI register base address\n");
+		return -ENXIO;
+	}
+
+	hc_base = (uintptr_t)hcd;
+	len = HC_LENGTH(xhci_readl(&hcd->cr_capbase));
+	hcor = (struct xhci_hcor *)(hc_base + len);
+
+	/* Save the default values of AXI read and write attributes */
+	plat->awcache = readl(hc_base + DRD2U3H_XHC_REGS_AXIWRA);
+	plat->arcache = readl(hc_base + DRD2U3H_XHC_REGS_AXIRDA);
+
+	/* Enable AXI read and write attributes. */
+	clrsetbits_le32((hc_base + DRD2U3H_XHC_REGS_AXIWRA),
+			(USBAXIWR_UA_MASK | USBAXIWR_SA_MASK),
+			(USBAXIWR_UA_VAL | USBAXIWR_SA_VAL));
+	clrsetbits_le32((hc_base + DRD2U3H_XHC_REGS_AXIRDA),
+			(USBAXIRD_UA_MASK | USBAXIRD_SA_MASK),
+			(USBAXIRD_UA_VAL | USBAXIRD_SA_VAL));
+
+	ret = xhci_register(dev, hcd, hcor);
+	if (ret)
+		dev_err(dev, "Failed to register xHCI\n");
+
+	return ret;
+}
+
+static int xhci_brcm_deregister(struct udevice *dev)
+{
+	struct brcm_xhci_platdata *plat = dev_get_platdata(dev);
+	uintptr_t hc_base;
+
+	hc_base = (uintptr_t)dev_read_addr(dev);
+
+	/* Restore the default values for AXI read and write attributes */
+	writel(plat->awcache, hc_base + DRD2U3H_XHC_REGS_AXIWRA);
+	writel(plat->arcache, hc_base + DRD2U3H_XHC_REGS_AXIRDA);
+
+	return xhci_deregister(dev);
+}
+
+static const struct udevice_id xhci_brcm_ids[] = {
+	{ .compatible = "brcm,generic-xhci" },
+	{ }
+};
+
+U_BOOT_DRIVER(usb_xhci) = {
+	.name				= "xhci_brcm",
+	.id				= UCLASS_USB,
+	.probe				= xhci_brcm_probe,
+	.remove				= xhci_brcm_deregister,
+	.ops				= &xhci_usb_ops,
+	.of_match			= xhci_brcm_ids,
+	.platdata_auto_alloc_size	= sizeof(struct brcm_xhci_platdata),
+	.priv_auto_alloc_size		= sizeof(struct xhci_ctrl),
+	.flags				= DM_FLAG_ALLOC_PRIV_DMA,
+};