1 /*
2 * OHCI HCD (Host Controller Driver) for USB.
3 *
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
7 *
8 * SA1111 Bus Glue
9 *
10 * Written by Christopher Hoover <ch@hpl.hp.com>
11 * Based on fragments of previous driver by Russell King et al.
12 *
13 * This file is licenced under the GPL.
14 */
15
16 #include <mach/hardware.h>
17 #include <asm/mach-types.h>
18 #include <mach/assabet.h>
19 #include <mach/badge4.h>
20 #include <asm/hardware/sa1111.h>
21
22 #ifndef CONFIG_SA1111
23 #error "This file is SA-1111 bus glue. CONFIG_SA1111 must be defined."
24 #endif
25
26 extern int usb_disabled(void);
27
28 /*-------------------------------------------------------------------------*/
29
sa1111_start_hc(struct sa1111_dev * dev)30 static void sa1111_start_hc(struct sa1111_dev *dev)
31 {
32 unsigned int usb_rst = 0;
33
34 printk(KERN_DEBUG "%s: starting SA-1111 OHCI USB Controller\n",
35 __FILE__);
36
37 #ifdef CONFIG_SA1100_BADGE4
38 if (machine_is_badge4()) {
39 badge4_set_5V(BADGE4_5V_USB, 1);
40 }
41 #endif
42
43 if (machine_is_xp860() ||
44 machine_has_neponset() ||
45 machine_is_pfs168() ||
46 machine_is_badge4())
47 usb_rst = USB_RESET_PWRSENSELOW | USB_RESET_PWRCTRLLOW;
48
49 /*
50 * Configure the power sense and control lines. Place the USB
51 * host controller in reset.
52 */
53 sa1111_writel(usb_rst | USB_RESET_FORCEIFRESET | USB_RESET_FORCEHCRESET,
54 dev->mapbase + SA1111_USB_RESET);
55
56 /*
57 * Now, carefully enable the USB clock, and take
58 * the USB host controller out of reset.
59 */
60 sa1111_enable_device(dev);
61 udelay(11);
62 sa1111_writel(usb_rst, dev->mapbase + SA1111_USB_RESET);
63 }
64
sa1111_stop_hc(struct sa1111_dev * dev)65 static void sa1111_stop_hc(struct sa1111_dev *dev)
66 {
67 unsigned int usb_rst;
68 printk(KERN_DEBUG "%s: stopping SA-1111 OHCI USB Controller\n",
69 __FILE__);
70
71 /*
72 * Put the USB host controller into reset.
73 */
74 usb_rst = sa1111_readl(dev->mapbase + SA1111_USB_RESET);
75 sa1111_writel(usb_rst | USB_RESET_FORCEIFRESET | USB_RESET_FORCEHCRESET,
76 dev->mapbase + SA1111_USB_RESET);
77
78 /*
79 * Stop the USB clock.
80 */
81 sa1111_disable_device(dev);
82
83 #ifdef CONFIG_SA1100_BADGE4
84 if (machine_is_badge4()) {
85 /* Disable power to the USB bus */
86 badge4_set_5V(BADGE4_5V_USB, 0);
87 }
88 #endif
89 }
90
91
92 /*-------------------------------------------------------------------------*/
93
94 #if 0
95 static void dump_hci_status(struct usb_hcd *hcd, const char *label)
96 {
97 unsigned long status = sa1111_readl(hcd->regs + SA1111_USB_STATUS);
98
99 dbg ("%s USB_STATUS = { %s%s%s%s%s}", label,
100 ((status & USB_STATUS_IRQHCIRMTWKUP) ? "IRQHCIRMTWKUP " : ""),
101 ((status & USB_STATUS_IRQHCIBUFFACC) ? "IRQHCIBUFFACC " : ""),
102 ((status & USB_STATUS_NIRQHCIM) ? "" : "IRQHCIM "),
103 ((status & USB_STATUS_NHCIMFCLR) ? "" : "HCIMFCLR "),
104 ((status & USB_STATUS_USBPWRSENSE) ? "USBPWRSENSE " : ""));
105 }
106 #endif
107
108 /*-------------------------------------------------------------------------*/
109
110 /* configure so an HC device and id are always provided */
111 /* always called with process context; sleeping is OK */
112
113
114 /**
115 * usb_hcd_sa1111_probe - initialize SA-1111-based HCDs
116 * Context: !in_interrupt()
117 *
118 * Allocates basic resources for this USB host controller, and
119 * then invokes the start() method for the HCD associated with it
120 * through the hotplug entry's driver_data.
121 *
122 * Store this function in the HCD's struct pci_driver as probe().
123 */
usb_hcd_sa1111_probe(const struct hc_driver * driver,struct sa1111_dev * dev)124 int usb_hcd_sa1111_probe (const struct hc_driver *driver,
125 struct sa1111_dev *dev)
126 {
127 struct usb_hcd *hcd;
128 int retval;
129
130 hcd = usb_create_hcd (driver, &dev->dev, "sa1111");
131 if (!hcd)
132 return -ENOMEM;
133 hcd->rsrc_start = dev->res.start;
134 hcd->rsrc_len = dev->res.end - dev->res.start + 1;
135
136 if (!request_mem_region(hcd->rsrc_start, hcd->rsrc_len, hcd_name)) {
137 dbg("request_mem_region failed");
138 retval = -EBUSY;
139 goto err1;
140 }
141 hcd->regs = dev->mapbase;
142
143 sa1111_start_hc(dev);
144 ohci_hcd_init(hcd_to_ohci(hcd));
145
146 retval = usb_add_hcd(hcd, dev->irq[1], IRQF_DISABLED);
147 if (retval == 0)
148 return retval;
149
150 sa1111_stop_hc(dev);
151 release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
152 err1:
153 usb_put_hcd(hcd);
154 return retval;
155 }
156
157
158 /* may be called without controller electrically present */
159 /* may be called with controller, bus, and devices active */
160
161 /**
162 * usb_hcd_sa1111_remove - shutdown processing for SA-1111-based HCDs
163 * @dev: USB Host Controller being removed
164 * Context: !in_interrupt()
165 *
166 * Reverses the effect of usb_hcd_sa1111_probe(), first invoking
167 * the HCD's stop() method. It is always called from a thread
168 * context, normally "rmmod", "apmd", or something similar.
169 *
170 */
usb_hcd_sa1111_remove(struct usb_hcd * hcd,struct sa1111_dev * dev)171 void usb_hcd_sa1111_remove (struct usb_hcd *hcd, struct sa1111_dev *dev)
172 {
173 usb_remove_hcd(hcd);
174 sa1111_stop_hc(dev);
175 release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
176 usb_put_hcd(hcd);
177 }
178
179 /*-------------------------------------------------------------------------*/
180
181 static int __devinit
ohci_sa1111_start(struct usb_hcd * hcd)182 ohci_sa1111_start (struct usb_hcd *hcd)
183 {
184 struct ohci_hcd *ohci = hcd_to_ohci (hcd);
185 int ret;
186
187 if ((ret = ohci_init(ohci)) < 0)
188 return ret;
189
190 if ((ret = ohci_run (ohci)) < 0) {
191 err ("can't start %s", hcd->self.bus_name);
192 ohci_stop (hcd);
193 return ret;
194 }
195 return 0;
196 }
197
198 /*-------------------------------------------------------------------------*/
199
200 static const struct hc_driver ohci_sa1111_hc_driver = {
201 .description = hcd_name,
202 .product_desc = "SA-1111 OHCI",
203 .hcd_priv_size = sizeof(struct ohci_hcd),
204
205 /*
206 * generic hardware linkage
207 */
208 .irq = ohci_irq,
209 .flags = HCD_USB11 | HCD_MEMORY,
210
211 /*
212 * basic lifecycle operations
213 */
214 .start = ohci_sa1111_start,
215 .stop = ohci_stop,
216
217 /*
218 * managing i/o requests and associated device resources
219 */
220 .urb_enqueue = ohci_urb_enqueue,
221 .urb_dequeue = ohci_urb_dequeue,
222 .endpoint_disable = ohci_endpoint_disable,
223
224 /*
225 * scheduling support
226 */
227 .get_frame_number = ohci_get_frame,
228
229 /*
230 * root hub support
231 */
232 .hub_status_data = ohci_hub_status_data,
233 .hub_control = ohci_hub_control,
234 #ifdef CONFIG_PM
235 .bus_suspend = ohci_bus_suspend,
236 .bus_resume = ohci_bus_resume,
237 #endif
238 .start_port_reset = ohci_start_port_reset,
239 };
240
241 /*-------------------------------------------------------------------------*/
242
ohci_hcd_sa1111_drv_probe(struct sa1111_dev * dev)243 static int ohci_hcd_sa1111_drv_probe(struct sa1111_dev *dev)
244 {
245 int ret;
246
247 if (usb_disabled())
248 return -ENODEV;
249
250 ret = usb_hcd_sa1111_probe(&ohci_sa1111_hc_driver, dev);
251 return ret;
252 }
253
ohci_hcd_sa1111_drv_remove(struct sa1111_dev * dev)254 static int ohci_hcd_sa1111_drv_remove(struct sa1111_dev *dev)
255 {
256 struct usb_hcd *hcd = sa1111_get_drvdata(dev);
257
258 usb_hcd_sa1111_remove(hcd, dev);
259 return 0;
260 }
261
262 static struct sa1111_driver ohci_hcd_sa1111_driver = {
263 .drv = {
264 .name = "sa1111-ohci",
265 },
266 .devid = SA1111_DEVID_USB,
267 .probe = ohci_hcd_sa1111_drv_probe,
268 .remove = ohci_hcd_sa1111_drv_remove,
269 };
270
271