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-rw-r--r--drivers/usb/host/ohci-sa1111.c294
1 files changed, 294 insertions, 0 deletions
diff --git a/drivers/usb/host/ohci-sa1111.c b/drivers/usb/host/ohci-sa1111.c
new file mode 100644
index 000000000..75c2b28b3
--- /dev/null
+++ b/drivers/usb/host/ohci-sa1111.c
@@ -0,0 +1,294 @@
+// SPDX-License-Identifier: GPL-1.0+
+/*
+ * OHCI HCD (Host Controller Driver) for USB.
+ *
+ * (C) Copyright 1999 Roman Weissgaerber <weissg@vienna.at>
+ * (C) Copyright 2000-2002 David Brownell <dbrownell@users.sourceforge.net>
+ * (C) Copyright 2002 Hewlett-Packard Company
+ *
+ * SA1111 Bus Glue
+ *
+ * Written by Christopher Hoover <ch@hpl.hp.com>
+ * Based on fragments of previous driver by Russell King et al.
+ *
+ * This file is licenced under the GPL.
+ */
+
+#include <asm/mach-types.h>
+#include <asm/hardware/sa1111.h>
+
+#ifndef CONFIG_SA1111
+#error "This file is SA-1111 bus glue. CONFIG_SA1111 must be defined."
+#endif
+
+#define USB_STATUS 0x0118
+#define USB_RESET 0x011c
+#define USB_IRQTEST 0x0120
+
+#define USB_RESET_FORCEIFRESET (1 << 0)
+#define USB_RESET_FORCEHCRESET (1 << 1)
+#define USB_RESET_CLKGENRESET (1 << 2)
+#define USB_RESET_SIMSCALEDOWN (1 << 3)
+#define USB_RESET_USBINTTEST (1 << 4)
+#define USB_RESET_SLEEPSTBYEN (1 << 5)
+#define USB_RESET_PWRSENSELOW (1 << 6)
+#define USB_RESET_PWRCTRLLOW (1 << 7)
+
+#define USB_STATUS_IRQHCIRMTWKUP (1 << 7)
+#define USB_STATUS_IRQHCIBUFFACC (1 << 8)
+#define USB_STATUS_NIRQHCIM (1 << 9)
+#define USB_STATUS_NHCIMFCLR (1 << 10)
+#define USB_STATUS_USBPWRSENSE (1 << 11)
+
+#if 0
+static void dump_hci_status(struct usb_hcd *hcd, const char *label)
+{
+ unsigned long status = readl_relaxed(hcd->regs + USB_STATUS);
+
+ printk(KERN_DEBUG "%s USB_STATUS = { %s%s%s%s%s}\n", label,
+ ((status & USB_STATUS_IRQHCIRMTWKUP) ? "IRQHCIRMTWKUP " : ""),
+ ((status & USB_STATUS_IRQHCIBUFFACC) ? "IRQHCIBUFFACC " : ""),
+ ((status & USB_STATUS_NIRQHCIM) ? "" : "IRQHCIM "),
+ ((status & USB_STATUS_NHCIMFCLR) ? "" : "HCIMFCLR "),
+ ((status & USB_STATUS_USBPWRSENSE) ? "USBPWRSENSE " : ""));
+}
+#endif
+
+static int ohci_sa1111_reset(struct usb_hcd *hcd)
+{
+ struct ohci_hcd *ohci = hcd_to_ohci(hcd);
+
+ ohci_hcd_init(ohci);
+ return ohci_init(ohci);
+}
+
+static int ohci_sa1111_start(struct usb_hcd *hcd)
+{
+ struct ohci_hcd *ohci = hcd_to_ohci(hcd);
+ int ret;
+
+ ret = ohci_run(ohci);
+ if (ret < 0) {
+ ohci_err(ohci, "can't start\n");
+ ohci_stop(hcd);
+ }
+ return ret;
+}
+
+static const struct hc_driver ohci_sa1111_hc_driver = {
+ .description = hcd_name,
+ .product_desc = "SA-1111 OHCI",
+ .hcd_priv_size = sizeof(struct ohci_hcd),
+
+ /*
+ * generic hardware linkage
+ */
+ .irq = ohci_irq,
+ .flags = HCD_USB11 | HCD_DMA | HCD_MEMORY,
+
+ /*
+ * basic lifecycle operations
+ */
+ .reset = ohci_sa1111_reset,
+ .start = ohci_sa1111_start,
+ .stop = ohci_stop,
+ .shutdown = ohci_shutdown,
+
+ /*
+ * managing i/o requests and associated device resources
+ */
+ .urb_enqueue = ohci_urb_enqueue,
+ .urb_dequeue = ohci_urb_dequeue,
+ .endpoint_disable = ohci_endpoint_disable,
+
+ /*
+ * scheduling support
+ */
+ .get_frame_number = ohci_get_frame,
+
+ /*
+ * root hub support
+ */
+ .hub_status_data = ohci_hub_status_data,
+ .hub_control = ohci_hub_control,
+#ifdef CONFIG_PM
+ .bus_suspend = ohci_bus_suspend,
+ .bus_resume = ohci_bus_resume,
+#endif
+ .start_port_reset = ohci_start_port_reset,
+};
+
+static int sa1111_start_hc(struct sa1111_dev *dev)
+{
+ unsigned int usb_rst = 0;
+ int ret;
+
+ dev_dbg(&dev->dev, "starting SA-1111 OHCI USB Controller\n");
+
+ if (machine_is_xp860() ||
+ machine_is_assabet() ||
+ machine_is_pfs168() ||
+ machine_is_badge4())
+ usb_rst = USB_RESET_PWRSENSELOW | USB_RESET_PWRCTRLLOW;
+
+ /*
+ * Configure the power sense and control lines. Place the USB
+ * host controller in reset.
+ */
+ writel_relaxed(usb_rst | USB_RESET_FORCEIFRESET | USB_RESET_FORCEHCRESET,
+ dev->mapbase + USB_RESET);
+
+ /*
+ * Now, carefully enable the USB clock, and take
+ * the USB host controller out of reset.
+ */
+ ret = sa1111_enable_device(dev);
+ if (ret == 0) {
+ udelay(11);
+ writel_relaxed(usb_rst, dev->mapbase + USB_RESET);
+ }
+
+ return ret;
+}
+
+static void sa1111_stop_hc(struct sa1111_dev *dev)
+{
+ unsigned int usb_rst;
+
+ dev_dbg(&dev->dev, "stopping SA-1111 OHCI USB Controller\n");
+
+ /*
+ * Put the USB host controller into reset.
+ */
+ usb_rst = readl_relaxed(dev->mapbase + USB_RESET);
+ writel_relaxed(usb_rst | USB_RESET_FORCEIFRESET | USB_RESET_FORCEHCRESET,
+ dev->mapbase + USB_RESET);
+
+ /*
+ * Stop the USB clock.
+ */
+ sa1111_disable_device(dev);
+}
+
+/**
+ * ohci_hcd_sa1111_probe - initialize SA-1111-based HCDs
+ *
+ * Allocates basic resources for this USB host controller, and
+ * then invokes the start() method for the HCD associated with it.
+ */
+static int ohci_hcd_sa1111_probe(struct sa1111_dev *dev)
+{
+ struct usb_hcd *hcd;
+ int ret, irq;
+
+ if (usb_disabled())
+ return -ENODEV;
+
+ /*
+ * We don't call dma_set_mask_and_coherent() here because the
+ * DMA mask has already been appropraitely setup by the core
+ * SA-1111 bus code (which includes bug workarounds.)
+ */
+
+ hcd = usb_create_hcd(&ohci_sa1111_hc_driver, &dev->dev, "sa1111");
+ if (!hcd)
+ return -ENOMEM;
+
+ hcd->rsrc_start = dev->res.start;
+ hcd->rsrc_len = resource_size(&dev->res);
+
+ irq = sa1111_get_irq(dev, 1);
+ if (irq <= 0) {
+ ret = irq ? : -ENXIO;
+ goto err1;
+ }
+
+ /*
+ * According to the "Intel StrongARM SA-1111 Microprocessor Companion
+ * Chip Specification Update" (June 2000), erratum #7, there is a
+ * significant bug in the SA1111 SDRAM shared memory controller. If
+ * an access to a region of memory above 1MB relative to the bank base,
+ * it is important that address bit 10 _NOT_ be asserted. Depending
+ * on the configuration of the RAM, bit 10 may correspond to one
+ * of several different (processor-relative) address bits.
+ *
+ * Section 4.6 of the "Intel StrongARM SA-1111 Development Module
+ * User's Guide" mentions that jumpers R51 and R52 control the
+ * target of SA-1111 DMA (either SDRAM bank 0 on Assabet, or
+ * SDRAM bank 1 on Neponset). The default configuration selects
+ * Assabet, so any address in bank 1 is necessarily invalid.
+ *
+ * As a workaround, use a bounce buffer in addressable memory
+ * as local_mem, relying on ZONE_DMA to provide an area that
+ * fits within the above constraints.
+ *
+ * SZ_64K is an estimate for what size this might need.
+ */
+ ret = usb_hcd_setup_local_mem(hcd, 0, 0, SZ_64K);
+ if (ret)
+ goto err1;
+
+ if (!request_mem_region(hcd->rsrc_start, hcd->rsrc_len, hcd_name)) {
+ dev_dbg(&dev->dev, "request_mem_region failed\n");
+ ret = -EBUSY;
+ goto err1;
+ }
+
+ hcd->regs = dev->mapbase;
+
+ ret = sa1111_start_hc(dev);
+ if (ret)
+ goto err2;
+
+ ret = usb_add_hcd(hcd, irq, 0);
+ if (ret == 0) {
+ device_wakeup_enable(hcd->self.controller);
+ return ret;
+ }
+
+ sa1111_stop_hc(dev);
+ err2:
+ release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
+ err1:
+ usb_put_hcd(hcd);
+ return ret;
+}
+
+/**
+ * ohci_hcd_sa1111_remove - shutdown processing for SA-1111-based HCDs
+ * @dev: USB Host Controller being removed
+ *
+ * Reverses the effect of ohci_hcd_sa1111_probe(), first invoking
+ * the HCD's stop() method.
+ */
+static void ohci_hcd_sa1111_remove(struct sa1111_dev *dev)
+{
+ struct usb_hcd *hcd = sa1111_get_drvdata(dev);
+
+ usb_remove_hcd(hcd);
+ sa1111_stop_hc(dev);
+ release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
+ usb_put_hcd(hcd);
+}
+
+static void ohci_hcd_sa1111_shutdown(struct device *_dev)
+{
+ struct sa1111_dev *dev = to_sa1111_device(_dev);
+ struct usb_hcd *hcd = sa1111_get_drvdata(dev);
+
+ if (test_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags)) {
+ hcd->driver->shutdown(hcd);
+ sa1111_stop_hc(dev);
+ }
+}
+
+static struct sa1111_driver ohci_hcd_sa1111_driver = {
+ .drv = {
+ .name = "sa1111-ohci",
+ .owner = THIS_MODULE,
+ .shutdown = ohci_hcd_sa1111_shutdown,
+ },
+ .devid = SA1111_DEVID_USB,
+ .probe = ohci_hcd_sa1111_probe,
+ .remove = ohci_hcd_sa1111_remove,
+};