--- /dev/null
+/*
+ * 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
+ *
+ * Bus Glue for pxa27x
+ *
+ * Written by Christopher Hoover <ch@hpl.hp.com>
+ * Based on fragments of previous driver by Russell King et al.
+ *
+ * Modified for LH7A404 from ohci-sa1111.c
+ * by Durgesh Pattamatta <pattamattad@sharpsec.com>
+ *
+ * Modified for pxa27x from ohci-lh7a404.c
+ * by Nick Bane <nick@cecomputing.co.uk> 26-8-2004
+ *
+ * This file is licenced under the GPL.
+ */
+
+#include <linux/device.h>
+#include <asm/mach-types.h>
+#include <asm/hardware.h>
+#include <asm/arch/pxa-regs.h>
+
+
+#define PMM_NPS_MODE 1
+#define PMM_GLOBAL_MODE 2
+#define PMM_PERPORT_MODE 3
+
+#define PXA_UHC_MAX_PORTNUM 3
+
+#define UHCRHPS(x) __REG2( 0x4C000050, (x)<<2 )
+
+static int pxa27x_ohci_pmm_state;
+
+/*
+ PMM_NPS_MODE -- PMM Non-power switching mode
+ Ports are powered continuously.
+
+ PMM_GLOBAL_MODE -- PMM global switching mode
+ All ports are powered at the same time.
+
+ PMM_PERPORT_MODE -- PMM per port switching mode
+ Ports are powered individually.
+ */
+static int pxa27x_ohci_select_pmm( int mode )
+{
+ pxa27x_ohci_pmm_state = mode;
+
+ switch ( mode ) {
+ case PMM_NPS_MODE:
+ UHCRHDA |= RH_A_NPS;
+ break;
+ case PMM_GLOBAL_MODE:
+ UHCRHDA &= ~(RH_A_NPS & RH_A_PSM);
+ break;
+ case PMM_PERPORT_MODE:
+ UHCRHDA &= ~(RH_A_NPS);
+ UHCRHDA |= RH_A_PSM;
+
+ /* Set port power control mask bits, only 3 ports. */
+ UHCRHDB |= (0x7<<17);
+ break;
+ default:
+ printk( KERN_ERR
+ "Invalid mode %d, set to non-power switch mode.\n",
+ mode );
+
+ pxa27x_ohci_pmm_state = PMM_NPS_MODE;
+ UHCRHDA |= RH_A_NPS;
+ }
+
+ return 0;
+}
+
+/*
+ If you select PMM_PERPORT_MODE, you should set the port power
+ */
+static int pxa27x_ohci_set_port_power( int port )
+{
+ if ( (pxa27x_ohci_pmm_state==PMM_PERPORT_MODE)
+ && (port>0) && (port<PXA_UHC_MAX_PORTNUM) ) {
+ UHCRHPS(port) |= 0x100;
+ return 0;
+ }
+ return -1;
+}
+
+/*
+ If you select PMM_PERPORT_MODE, you should set the port power
+ */
+static int pxa27x_ohci_clear_port_power( int port )
+{
+ if ( (pxa27x_ohci_pmm_state==PMM_PERPORT_MODE)
+ && (port>0) && (port<PXA_UHC_MAX_PORTNUM) ) {
+ UHCRHPS(port) |= 0x200;
+ return 0;
+ }
+
+ return -1;
+}
+
+extern int usb_disabled(void);
+
+/*-------------------------------------------------------------------------*/
+
+static void pxa27x_start_hc(struct platform_device *dev)
+{
+ pxa_set_cken(CKEN10_USBHOST, 1);
+
+ UHCHR |= UHCHR_FHR;
+ udelay(11);
+ UHCHR &= ~UHCHR_FHR;
+
+ UHCHR |= UHCHR_FSBIR;
+ while (UHCHR & UHCHR_FSBIR)
+ cpu_relax();
+
+ /* This could be properly abstracted away through the
+ device data the day more machines are supported and
+ their differences can be figured out correctly. */
+ if (machine_is_mainstone()) {
+ /* setup Port1 GPIO pin. */
+ pxa_gpio_mode( 88 | GPIO_ALT_FN_1_IN); /* USBHPWR1 */
+ pxa_gpio_mode( 89 | GPIO_ALT_FN_2_OUT); /* USBHPEN1 */
+
+ /* Set the Power Control Polarity Low and Power Sense
+ Polarity Low to active low. Supply power to USB ports. */
+ UHCHR = (UHCHR | UHCHR_PCPL | UHCHR_PSPL) &
+ ~(UHCHR_SSEP1 | UHCHR_SSEP2 | UHCHR_SSEP3 | UHCHR_SSE);
+ }
+
+ UHCHR &= ~UHCHR_SSE;
+
+ UHCHIE = (UHCHIE_UPRIE | UHCHIE_RWIE);
+}
+
+static void pxa27x_stop_hc(struct platform_device *dev)
+{
+ UHCHR |= UHCHR_FHR;
+ udelay(11);
+ UHCHR &= ~UHCHR_FHR;
+
+ UHCCOMS |= 1;
+ udelay(10);
+
+ pxa_set_cken(CKEN10_USBHOST, 0);
+}
+
+
+/*-------------------------------------------------------------------------*/
+
+void usb_hcd_pxa27x_remove (struct usb_hcd *, struct platform_device *);
+
+/* configure so an HC device and id are always provided */
+/* always called with process context; sleeping is OK */
+
+
+/**
+ * usb_hcd_pxa27x_probe - initialize pxa27x-based HCDs
+ * Context: !in_interrupt()
+ *
+ * Allocates basic resources for this USB host controller, and
+ * then invokes the start() method for the HCD associated with it
+ * through the hotplug entry's driver_data.
+ *
+ */
+int usb_hcd_pxa27x_probe (const struct hc_driver *driver,
+ struct usb_hcd **hcd_out,
+ struct platform_device *dev)
+{
+ int retval;
+ struct usb_hcd *hcd = 0;
+
+ unsigned int *addr = NULL;
+
+ if (!request_mem_region(dev->resource[0].start,
+ dev->resource[0].end
+ - dev->resource[0].start + 1, hcd_name)) {
+ pr_debug("request_mem_region failed");
+ return -EBUSY;
+ }
+
+ pxa27x_start_hc(dev);
+
+ /* Select Power Management Mode */
+ pxa27x_ohci_select_pmm( PMM_PERPORT_MODE );
+
+ /* If choosing PMM_PERPORT_MODE, we should set the port power before we use it. */
+ if (pxa27x_ohci_set_port_power(1) < 0)
+ printk(KERN_ERR "Setting port 1 power failed.\n");
+
+ if (pxa27x_ohci_clear_port_power(2) < 0)
+ printk(KERN_ERR "Setting port 2 power failed.\n");
+
+ if (pxa27x_ohci_clear_port_power(3) < 0)
+ printk(KERN_ERR "Setting port 3 power failed.\n");
+
+ addr = ioremap(dev->resource[0].start,
+ dev->resource[0].end - dev->resource[0].start + 1);
+ if (!addr) {
+ pr_debug("ioremap failed");
+ retval = -ENOMEM;
+ goto err1;
+ }
+
+ hcd = driver->hcd_alloc ();
+ if (hcd == NULL){
+ pr_debug ("hcd_alloc failed");
+ retval = -ENOMEM;
+ goto err1;
+ }
+
+ if(dev->resource[1].flags != IORESOURCE_IRQ){
+ pr_debug ("resource[1] is not IORESOURCE_IRQ");
+ retval = -ENOMEM;
+ goto err1;
+ }
+
+ hcd->driver = (struct hc_driver *) driver;
+ hcd->description = driver->description;
+ hcd->irq = dev->resource[1].start;
+ hcd->regs = addr;
+ hcd->self.controller = &dev->dev;
+
+ retval = hcd_buffer_create (hcd);
+ if (retval != 0) {
+ pr_debug ("pool alloc fail");
+ goto err1;
+ }
+
+ retval = request_irq (hcd->irq, usb_hcd_irq, SA_INTERRUPT,
+ hcd->description, hcd);
+ if (retval != 0) {
+ pr_debug("request_irq(%d) failed with retval %d\n",hcd->irq,retval);
+ retval = -EBUSY;
+ goto err2;
+ }
+
+ pr_debug ("%s (pxa27x) at 0x%p, irq %d",
+ hcd->description, hcd->regs, hcd->irq);
+
+ usb_bus_init (&hcd->self);
+ hcd->self.op = &usb_hcd_operations;
+ hcd->self.release = &usb_hcd_release;
+ hcd->self.hcpriv = (void *) hcd;
+ hcd->self.bus_name = "pxa27x";
+ hcd->product_desc = "PXA27x OHCI";
+
+ INIT_LIST_HEAD (&hcd->dev_list);
+
+ usb_register_bus (&hcd->self);
+
+ if ((retval = driver->start (hcd)) < 0) {
+ usb_hcd_pxa27x_remove(hcd, dev);
+ return retval;
+ }
+
+ *hcd_out = hcd;
+ return 0;
+
+ err2:
+ hcd_buffer_destroy (hcd);
+ err1:
+ kfree(hcd);
+ pxa27x_stop_hc(dev);
+ release_mem_region(dev->resource[0].start,
+ dev->resource[0].end
+ - dev->resource[0].start + 1);
+ return retval;
+}
+
+
+/* may be called without controller electrically present */
+/* may be called with controller, bus, and devices active */
+
+/**
+ * usb_hcd_pxa27x_remove - shutdown processing for pxa27x-based HCDs
+ * @dev: USB Host Controller being removed
+ * Context: !in_interrupt()
+ *
+ * Reverses the effect of usb_hcd_pxa27x_probe(), first invoking
+ * the HCD's stop() method. It is always called from a thread
+ * context, normally "rmmod", "apmd", or something similar.
+ *
+ */
+void usb_hcd_pxa27x_remove (struct usb_hcd *hcd, struct platform_device *dev)
+{
+ pr_debug ("remove: %s, state %x", hcd->self.bus_name, hcd->state);
+
+ if (in_interrupt ())
+ BUG ();
+
+ hcd->state = USB_STATE_QUIESCING;
+
+ pr_debug ("%s: roothub graceful disconnect", hcd->self.bus_name);
+ usb_disconnect (&hcd->self.root_hub);
+
+ hcd->driver->stop (hcd);
+ hcd->state = USB_STATE_HALT;
+
+ free_irq (hcd->irq, hcd);
+ hcd_buffer_destroy (hcd);
+
+ usb_deregister_bus (&hcd->self);
+
+ pxa27x_stop_hc(dev);
+ release_mem_region(dev->resource[0].start,
+ dev->resource[0].end - dev->resource[0].start + 1);
+}
+
+/*-------------------------------------------------------------------------*/
+
+static int __devinit
+ohci_pxa27x_start (struct usb_hcd *hcd)
+{
+ struct ohci_hcd *ohci = hcd_to_ohci (hcd);
+ int ret;
+
+ ohci_dbg (ohci, "ohci_pxa27x_start, ohci:%p", ohci);
+
+ if ((ret = ohci_init(ohci)) < 0)
+ return ret;
+
+ if ((ret = ohci_run (ohci)) < 0) {
+ err ("can't start %s", ohci->hcd.self.bus_name);
+ ohci_stop (hcd);
+ return ret;
+ }
+
+ return 0;
+}
+
+/*-------------------------------------------------------------------------*/
+
+static const struct hc_driver ohci_pxa27x_hc_driver = {
+ .description = hcd_name,
+
+ /*
+ * generic hardware linkage
+ */
+ .irq = ohci_irq,
+ .flags = HCD_USB11,
+
+ /*
+ * basic lifecycle operations
+ */
+ .start = ohci_pxa27x_start,
+ .stop = ohci_stop,
+
+ /*
+ * memory lifecycle (except per-request)
+ */
+ .hcd_alloc = ohci_hcd_alloc,
+
+ /*
+ * 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_USB_SUSPEND
+ .hub_suspend = ohci_hub_suspend,
+ .hub_resume = ohci_hub_resume,
+#endif
+};
+
+/*-------------------------------------------------------------------------*/
+
+static int ohci_hcd_pxa27x_drv_probe(struct device *dev)
+{
+ struct platform_device *pdev = to_platform_device(dev);
+ struct usb_hcd *hcd = NULL;
+ int ret;
+
+ pr_debug ("In ohci_hcd_pxa27x_drv_probe");
+
+ if (usb_disabled())
+ return -ENODEV;
+
+ ret = usb_hcd_pxa27x_probe(&ohci_pxa27x_hc_driver, &hcd, pdev);
+
+ if (ret == 0)
+ dev_set_drvdata(dev, hcd);
+
+ return ret;
+}
+
+static int ohci_hcd_pxa27x_drv_remove(struct device *dev)
+{
+ struct platform_device *pdev = to_platform_device(dev);
+ struct usb_hcd *hcd = dev_get_drvdata(dev);
+
+ usb_hcd_pxa27x_remove(hcd, pdev);
+ dev_set_drvdata(dev, NULL);
+ return 0;
+}
+
+static int ohci_hcd_pxa27x_drv_suspend(struct device *dev, u32 state, u32 level)
+{
+// struct platform_device *pdev = to_platform_device(dev);
+// struct usb_hcd *hcd = dev_get_drvdata(dev);
+ printk("%s: not implemented yet\n", __FUNCTION__);
+
+ return 0;
+}
+
+static int ohci_hcd_pxa27x_drv_resume(struct device *dev, u32 state)
+{
+// struct platform_device *pdev = to_platform_device(dev);
+// struct usb_hcd *hcd = dev_get_drvdata(dev);
+ printk("%s: not implemented yet\n", __FUNCTION__);
+
+ return 0;
+}
+
+
+static struct device_driver ohci_hcd_pxa27x_driver = {
+ .name = "pxa27x-ohci",
+ .bus = &platform_bus_type,
+ .probe = ohci_hcd_pxa27x_drv_probe,
+ .remove = ohci_hcd_pxa27x_drv_remove,
+ .suspend = ohci_hcd_pxa27x_drv_suspend,
+ .resume = ohci_hcd_pxa27x_drv_resume,
+};
+
+static int __init ohci_hcd_pxa27x_init (void)
+{
+ pr_debug (DRIVER_INFO " (pxa27x)");
+ pr_debug ("block sizes: ed %d td %d\n",
+ sizeof (struct ed), sizeof (struct td));
+
+ return driver_register(&ohci_hcd_pxa27x_driver);
+}
+
+static void __exit ohci_hcd_pxa27x_cleanup (void)
+{
+ driver_unregister(&ohci_hcd_pxa27x_driver);
+}
+
+module_init (ohci_hcd_pxa27x_init);
+module_exit (ohci_hcd_pxa27x_cleanup);
git://git.onelab.eu / linux-2.6.git / blobdiff