Linux 4.2.1
[linux/fpc-iii.git] / drivers / usb / host / ohci-sa1111.c
blob2ac266d692a2960acb400773738014eb728933b8
1 /*
2 * OHCI HCD (Host Controller Driver) for USB.
4 * (C) Copyright 1999 Roman Weissgaerber <weissg@vienna.at>
5 * (C) Copyright 2000-2002 David Brownell <dbrownell@users.sourceforge.net>
6 * (C) Copyright 2002 Hewlett-Packard Company
8 * SA1111 Bus Glue
10 * Written by Christopher Hoover <ch@hpl.hp.com>
11 * Based on fragments of previous driver by Russell King et al.
13 * This file is licenced under the GPL.
16 #include <mach/hardware.h>
17 #include <asm/mach-types.h>
18 #include <mach/assabet.h>
19 #include <asm/hardware/sa1111.h>
21 #ifndef CONFIG_SA1111
22 #error "This file is SA-1111 bus glue. CONFIG_SA1111 must be defined."
23 #endif
25 #define USB_STATUS 0x0118
26 #define USB_RESET 0x011c
27 #define USB_IRQTEST 0x0120
29 #define USB_RESET_FORCEIFRESET (1 << 0)
30 #define USB_RESET_FORCEHCRESET (1 << 1)
31 #define USB_RESET_CLKGENRESET (1 << 2)
32 #define USB_RESET_SIMSCALEDOWN (1 << 3)
33 #define USB_RESET_USBINTTEST (1 << 4)
34 #define USB_RESET_SLEEPSTBYEN (1 << 5)
35 #define USB_RESET_PWRSENSELOW (1 << 6)
36 #define USB_RESET_PWRCTRLLOW (1 << 7)
38 #define USB_STATUS_IRQHCIRMTWKUP (1 << 7)
39 #define USB_STATUS_IRQHCIBUFFACC (1 << 8)
40 #define USB_STATUS_NIRQHCIM (1 << 9)
41 #define USB_STATUS_NHCIMFCLR (1 << 10)
42 #define USB_STATUS_USBPWRSENSE (1 << 11)
44 #if 0
45 static void dump_hci_status(struct usb_hcd *hcd, const char *label)
47 unsigned long status = sa1111_readl(hcd->regs + USB_STATUS);
49 printk(KERN_DEBUG "%s USB_STATUS = { %s%s%s%s%s}\n", label,
50 ((status & USB_STATUS_IRQHCIRMTWKUP) ? "IRQHCIRMTWKUP " : ""),
51 ((status & USB_STATUS_IRQHCIBUFFACC) ? "IRQHCIBUFFACC " : ""),
52 ((status & USB_STATUS_NIRQHCIM) ? "" : "IRQHCIM "),
53 ((status & USB_STATUS_NHCIMFCLR) ? "" : "HCIMFCLR "),
54 ((status & USB_STATUS_USBPWRSENSE) ? "USBPWRSENSE " : ""));
56 #endif
58 static int ohci_sa1111_reset(struct usb_hcd *hcd)
60 struct ohci_hcd *ohci = hcd_to_ohci(hcd);
62 ohci_hcd_init(ohci);
63 return ohci_init(ohci);
66 static int ohci_sa1111_start(struct usb_hcd *hcd)
68 struct ohci_hcd *ohci = hcd_to_ohci(hcd);
69 int ret;
71 ret = ohci_run(ohci);
72 if (ret < 0) {
73 ohci_err(ohci, "can't start\n");
74 ohci_stop(hcd);
76 return ret;
79 static const struct hc_driver ohci_sa1111_hc_driver = {
80 .description = hcd_name,
81 .product_desc = "SA-1111 OHCI",
82 .hcd_priv_size = sizeof(struct ohci_hcd),
85 * generic hardware linkage
87 .irq = ohci_irq,
88 .flags = HCD_USB11 | HCD_MEMORY,
91 * basic lifecycle operations
93 .reset = ohci_sa1111_reset,
94 .start = ohci_sa1111_start,
95 .stop = ohci_stop,
96 .shutdown = ohci_shutdown,
99 * managing i/o requests and associated device resources
101 .urb_enqueue = ohci_urb_enqueue,
102 .urb_dequeue = ohci_urb_dequeue,
103 .endpoint_disable = ohci_endpoint_disable,
106 * scheduling support
108 .get_frame_number = ohci_get_frame,
111 * root hub support
113 .hub_status_data = ohci_hub_status_data,
114 .hub_control = ohci_hub_control,
115 #ifdef CONFIG_PM
116 .bus_suspend = ohci_bus_suspend,
117 .bus_resume = ohci_bus_resume,
118 #endif
119 .start_port_reset = ohci_start_port_reset,
122 static int sa1111_start_hc(struct sa1111_dev *dev)
124 unsigned int usb_rst = 0;
125 int ret;
127 dev_dbg(&dev->dev, "starting SA-1111 OHCI USB Controller\n");
129 if (machine_is_xp860() ||
130 machine_has_neponset() ||
131 machine_is_pfs168() ||
132 machine_is_badge4())
133 usb_rst = USB_RESET_PWRSENSELOW | USB_RESET_PWRCTRLLOW;
136 * Configure the power sense and control lines. Place the USB
137 * host controller in reset.
139 sa1111_writel(usb_rst | USB_RESET_FORCEIFRESET | USB_RESET_FORCEHCRESET,
140 dev->mapbase + USB_RESET);
143 * Now, carefully enable the USB clock, and take
144 * the USB host controller out of reset.
146 ret = sa1111_enable_device(dev);
147 if (ret == 0) {
148 udelay(11);
149 sa1111_writel(usb_rst, dev->mapbase + USB_RESET);
152 return ret;
155 static void sa1111_stop_hc(struct sa1111_dev *dev)
157 unsigned int usb_rst;
159 dev_dbg(&dev->dev, "stopping SA-1111 OHCI USB Controller\n");
162 * Put the USB host controller into reset.
164 usb_rst = sa1111_readl(dev->mapbase + USB_RESET);
165 sa1111_writel(usb_rst | USB_RESET_FORCEIFRESET | USB_RESET_FORCEHCRESET,
166 dev->mapbase + USB_RESET);
169 * Stop the USB clock.
171 sa1111_disable_device(dev);
175 * ohci_hcd_sa1111_probe - initialize SA-1111-based HCDs
177 * Allocates basic resources for this USB host controller, and
178 * then invokes the start() method for the HCD associated with it.
180 static int ohci_hcd_sa1111_probe(struct sa1111_dev *dev)
182 struct usb_hcd *hcd;
183 int ret;
185 if (usb_disabled())
186 return -ENODEV;
189 * We don't call dma_set_mask_and_coherent() here because the
190 * DMA mask has already been appropraitely setup by the core
191 * SA-1111 bus code (which includes bug workarounds.)
194 hcd = usb_create_hcd(&ohci_sa1111_hc_driver, &dev->dev, "sa1111");
195 if (!hcd)
196 return -ENOMEM;
198 hcd->rsrc_start = dev->res.start;
199 hcd->rsrc_len = resource_size(&dev->res);
201 if (!request_mem_region(hcd->rsrc_start, hcd->rsrc_len, hcd_name)) {
202 dev_dbg(&dev->dev, "request_mem_region failed\n");
203 ret = -EBUSY;
204 goto err1;
207 hcd->regs = dev->mapbase;
209 ret = sa1111_start_hc(dev);
210 if (ret)
211 goto err2;
213 ret = usb_add_hcd(hcd, dev->irq[1], 0);
214 if (ret == 0) {
215 device_wakeup_enable(hcd->self.controller);
216 return ret;
219 sa1111_stop_hc(dev);
220 err2:
221 release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
222 err1:
223 usb_put_hcd(hcd);
224 return ret;
228 * ohci_hcd_sa1111_remove - shutdown processing for SA-1111-based HCDs
229 * @dev: USB Host Controller being removed
231 * Reverses the effect of ohci_hcd_sa1111_probe(), first invoking
232 * the HCD's stop() method.
234 static int ohci_hcd_sa1111_remove(struct sa1111_dev *dev)
236 struct usb_hcd *hcd = sa1111_get_drvdata(dev);
238 usb_remove_hcd(hcd);
239 sa1111_stop_hc(dev);
240 release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
241 usb_put_hcd(hcd);
243 return 0;
246 static void ohci_hcd_sa1111_shutdown(struct sa1111_dev *dev)
248 struct usb_hcd *hcd = sa1111_get_drvdata(dev);
250 if (test_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags)) {
251 hcd->driver->shutdown(hcd);
252 sa1111_stop_hc(dev);
256 static struct sa1111_driver ohci_hcd_sa1111_driver = {
257 .drv = {
258 .name = "sa1111-ohci",
259 .owner = THIS_MODULE,
261 .devid = SA1111_DEVID_USB,
262 .probe = ohci_hcd_sa1111_probe,
263 .remove = ohci_hcd_sa1111_remove,
264 .shutdown = ohci_hcd_sa1111_shutdown,