1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
|
// 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_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;
}
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 int 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);
return 0;
}
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,
};
|
