[U-Boot] [PATCH] usb: ohci: Add OHCI PCI driver

[Marek Vasut]

Add small OHCI PCI driver for USB 1.1 OHCI controllers on PCI bus.
This driver matches only on PCI class (serial-ohci) and requires
DM-USB ; any sort of deprecated legacy usage is not supported.

Signed-off-by: Marek Vasut <marek.vasut+renesas at gmail.com>
---
 drivers/usb/host/Kconfig    |  6 +++++
 drivers/usb/host/Makefile   |  1 +
 drivers/usb/host/ohci-pci.c | 55 +++++++++++++++++++++++++++++++++++++++++++++
 3 files changed, 62 insertions(+)
 create mode 100644 drivers/usb/host/ohci-pci.c

diff --git a/drivers/usb/host/Kconfig b/drivers/usb/host/Kconfig
index b4dd005651..99ecf5bdd7 100644
--- a/drivers/usb/host/Kconfig
+++ b/drivers/usb/host/Kconfig
@@ -225,6 +225,12 @@ config USB_OHCI_GENERIC
 	---help---
 	  Enables support for generic OHCI controller.
 
+config USB_OHCI_PCI
+	bool "Support for PCI-based OHCI USB controller"
+	depends on DM_USB
+	help
+	  Enables support for the PCI-based OHCI controller.
+
 endif # USB_OHCI_HCD
 
 config USB_UHCI_HCD
diff --git a/drivers/usb/host/Makefile b/drivers/usb/host/Makefile
index cb8c315a15..b7c94cadcb 100644
--- a/drivers/usb/host/Makefile
+++ b/drivers/usb/host/Makefile
@@ -18,6 +18,7 @@ obj-$(CONFIG_USB_OHCI_EP93XX) += ohci-ep93xx.o
 obj-$(CONFIG_USB_OHCI_SUNXI) += ohci-sunxi.o
 obj-$(CONFIG_USB_OHCI_LPC32XX) += ohci-lpc32xx.o
 obj-$(CONFIG_USB_OHCI_GENERIC) += ohci-generic.o
+obj-$(CONFIG_USB_OHCI_PCI) += ohci-pci.o
 
 # echi
 obj-$(CONFIG_USB_EHCI_HCD) += ehci-hcd.o
diff --git a/drivers/usb/host/ohci-pci.c b/drivers/usb/host/ohci-pci.c
new file mode 100644
index 0000000000..dd078f008e
--- /dev/null
+++ b/drivers/usb/host/ohci-pci.c
@@ -0,0 +1,55 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright (C) 2018 Marek Vasut <marek.vasut at gmail.com>
+ */
+
+#include <common.h>
+#include <dm.h>
+#include <errno.h>
+#include <pci.h>
+#include <usb.h>
+#include <asm/io.h>
+
+#include "ohci.h"
+
+/* Information about the USB port */
+struct ohci_pci_priv {
+	ohci_t	ohci;
+};
+
+static int ohci_pci_probe(struct udevice *dev)
+{
+	struct ohci_regs *regs;
+	u32 cmd;
+
+	regs = dm_pci_map_bar(dev, PCI_BASE_ADDRESS_0, PCI_REGION_MEM);
+	if (!regs)
+		return -ENOMEM;
+
+	/* Enable busmaster */
+	dm_pci_read_config32(dev, PCI_COMMAND, &cmd);
+	cmd |= PCI_COMMAND_MASTER;
+	dm_pci_write_config32(dev, PCI_COMMAND, cmd);
+
+	debug("OHCI-PCI init regs %p\n", regs);
+
+	return ohci_register(dev, regs);
+}
+
+U_BOOT_DRIVER(ohci_pci) = {
+	.name	= "ohci_pci",
+	.id	= UCLASS_USB,
+	.probe	= ohci_pci_probe,
+	.remove	= ohci_deregister,
+	.ops	= &ohci_usb_ops,
+	.platdata_auto_alloc_size = sizeof(struct usb_platdata),
+	.priv_auto_alloc_size = sizeof(struct ohci_pci_priv),
+	.flags	= DM_FLAG_ALLOC_PRIV_DMA,
+};
+
+static struct pci_device_id ohci_pci_supported[] = {
+	{ PCI_DEVICE_CLASS(PCI_CLASS_SERIAL_USB_OHCI, ~0) },
+	{},
+};
+
+U_BOOT_PCI_DEVICE(ohci_pci, ohci_pci_supported);
-- 
2.16.2