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
272
273
274
275
276
277
278
279
280
281
282
283
284
|
/*
* EHCI HCD (Host Controller Driver) for USB.
*
* (C) Copyright 2000-2004 David Brownell <dbrownell@users.sourceforge.net>
*
* Bus Glue for AMD Alchemy Au1xxx
*
* Based on "ohci-au1xxx.c" by Matt Porter <mporter@kernel.crashing.org>
*
* Modified for AMD Alchemy Au1200 EHC
* by K.Boge <karsten.boge@amd.com>
*
* This file is licenced under the GPL.
*/
#include <linux/platform_device.h>
#include <asm/mach-au1x00/au1000.h>
#ifndef CONFIG_SOC_AU1200
#error "this Alchemy chip doesn't have EHCI"
#else /* Au1200 */
#define USB_HOST_CONFIG (USB_MSR_BASE + USB_MSR_MCFG)
#define USB_MCFG_PFEN (1<<31)
#define USB_MCFG_RDCOMB (1<<30)
#define USB_MCFG_SSDEN (1<<23)
#define USB_MCFG_PHYPLLEN (1<<19)
#define USB_MCFG_EHCCLKEN (1<<17)
#define USB_MCFG_UCAM (1<<7)
#define USB_MCFG_EBMEN (1<<3)
#define USB_MCFG_EMEMEN (1<<2)
#define USBH_ENABLE_CE (USB_MCFG_PHYPLLEN | USB_MCFG_EHCCLKEN)
#ifdef CONFIG_DMA_COHERENT
#define USBH_ENABLE_INIT (USBH_ENABLE_CE \
| USB_MCFG_PFEN | USB_MCFG_RDCOMB \
| USB_MCFG_SSDEN | USB_MCFG_UCAM \
| USB_MCFG_EBMEN | USB_MCFG_EMEMEN)
#else
#define USBH_ENABLE_INIT (USBH_ENABLE_CE \
| USB_MCFG_PFEN | USB_MCFG_RDCOMB \
| USB_MCFG_SSDEN \
| USB_MCFG_EBMEN | USB_MCFG_EMEMEN)
#endif
#define USBH_DISABLE (USB_MCFG_EBMEN | USB_MCFG_EMEMEN)
#endif /* Au1200 */
extern int usb_disabled(void);
/*-------------------------------------------------------------------------*/
static void au1xxx_start_ehc(struct platform_device *dev)
{
pr_debug(__FILE__ ": starting Au1xxx EHCI USB Controller\n");
/* write HW defaults again in case Yamon cleared them */
if (au_readl(USB_HOST_CONFIG) == 0) {
au_writel(0x00d02000, USB_HOST_CONFIG);
au_readl(USB_HOST_CONFIG);
udelay(1000);
}
/* enable host controller */
au_writel(USBH_ENABLE_CE | au_readl(USB_HOST_CONFIG), USB_HOST_CONFIG);
au_readl(USB_HOST_CONFIG);
udelay(1000);
au_writel(USBH_ENABLE_INIT | au_readl(USB_HOST_CONFIG),
USB_HOST_CONFIG);
au_readl(USB_HOST_CONFIG);
udelay(1000);
pr_debug(__FILE__ ": Clock to USB host has been enabled\n");
}
static void au1xxx_stop_ehc(struct platform_device *dev)
{
pr_debug(__FILE__ ": stopping Au1xxx EHCI USB Controller\n");
/* Disable mem */
au_writel(~USBH_DISABLE & au_readl(USB_HOST_CONFIG), USB_HOST_CONFIG);
udelay(1000);
/* Disable clock */
au_writel(~USB_MCFG_EHCCLKEN & au_readl(USB_HOST_CONFIG),
USB_HOST_CONFIG);
au_readl(USB_HOST_CONFIG);
}
/*-------------------------------------------------------------------------*/
/* configure so an HC device and id are always provided */
/* always called with process context; sleeping is OK */
/**
* usb_ehci_au1xxx_probe - initialize Au1xxx-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_ehci_au1xxx_probe(const struct hc_driver *driver,
struct usb_hcd **hcd_out, struct platform_device *dev)
{
int retval;
struct usb_hcd *hcd;
struct ehci_hcd *ehci;
#if defined(CONFIG_SOC_AU1200) && defined(CONFIG_DMA_COHERENT)
/* Au1200 AB USB does not support coherent memory */
if (!(read_c0_prid() & 0xff)) {
pr_info("%s: this is chip revision AB!\n", dev->dev.name);
pr_info("%s: update your board or re-configure the kernel\n",
dev->dev.name);
return -ENODEV;
}
#endif
au1xxx_start_ehc(dev);
if (dev->resource[1].flags != IORESOURCE_IRQ) {
pr_debug("resource[1] is not IORESOURCE_IRQ");
retval = -ENOMEM;
}
hcd = usb_create_hcd(driver, &dev->dev, "Au1xxx");
if (!hcd)
return -ENOMEM;
hcd->rsrc_start = dev->resource[0].start;
hcd->rsrc_len = dev->resource[0].end - dev->resource[0].start + 1;
if (!request_mem_region(hcd->rsrc_start, hcd->rsrc_len, hcd_name)) {
pr_debug("request_mem_region failed");
retval = -EBUSY;
goto err1;
}
hcd->regs = ioremap(hcd->rsrc_start, hcd->rsrc_len);
if (!hcd->regs) {
pr_debug("ioremap failed");
retval = -ENOMEM;
goto err2;
}
ehci = hcd_to_ehci(hcd);
ehci->caps = hcd->regs;
ehci->regs = hcd->regs + HC_LENGTH(readl(&ehci->caps->hc_capbase));
/* cache this readonly data; minimize chip reads */
ehci->hcs_params = readl(&ehci->caps->hcs_params);
/* ehci_hcd_init(hcd_to_ehci(hcd)); */
retval =
usb_add_hcd(hcd, dev->resource[1].start, SA_INTERRUPT | SA_SHIRQ);
if (retval == 0)
return retval;
au1xxx_stop_ehc(dev);
iounmap(hcd->regs);
err2:
release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
err1:
usb_put_hcd(hcd);
return retval;
}
/* may be called without controller electrically present */
/* may be called with controller, bus, and devices active */
/**
* usb_ehci_hcd_au1xxx_remove - shutdown processing for Au1xxx-based HCDs
* @dev: USB Host Controller being removed
* Context: !in_interrupt()
*
* Reverses the effect of usb_ehci_hcd_au1xxx_probe(), first invoking
* the HCD's stop() method. It is always called from a thread
* context, normally "rmmod", "apmd", or something similar.
*
*/
void usb_ehci_au1xxx_remove(struct usb_hcd *hcd, struct platform_device *dev)
{
usb_remove_hcd(hcd);
iounmap(hcd->regs);
release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
usb_put_hcd(hcd);
au1xxx_stop_ehc(dev);
}
/*-------------------------------------------------------------------------*/
static const struct hc_driver ehci_au1xxx_hc_driver = {
.description = hcd_name,
.product_desc = "Au1xxx EHCI",
.hcd_priv_size = sizeof(struct ehci_hcd),
/*
* generic hardware linkage
*/
.irq = ehci_irq,
.flags = HCD_MEMORY | HCD_USB2,
/*
* basic lifecycle operations
*/
.reset = ehci_init,
.start = ehci_run,
.stop = ehci_stop,
/*
* managing i/o requests and associated device resources
*/
.urb_enqueue = ehci_urb_enqueue,
.urb_dequeue = ehci_urb_dequeue,
.endpoint_disable = ehci_endpoint_disable,
/*
* scheduling support
*/
.get_frame_number = ehci_get_frame,
/*
* root hub support
*/
.hub_status_data = ehci_hub_status_data,
.hub_control = ehci_hub_control,
#ifdef CONFIG_PM
.hub_suspend = ehci_hub_suspend,
.hub_resume = ehci_hub_resume,
#endif
};
/*-------------------------------------------------------------------------*/
static int ehci_hcd_au1xxx_drv_probe(struct device *dev)
{
struct platform_device *pdev = to_platform_device(dev);
struct usb_hcd *hcd = NULL;
int ret;
pr_debug("In ehci_hcd_au1xxx_drv_probe\n");
if (usb_disabled())
return -ENODEV;
ret = usb_ehci_au1xxx_probe(&ehci_au1xxx_hc_driver, &hcd, pdev);
return ret;
}
static int ehci_hcd_au1xxx_drv_remove(struct device *dev)
{
struct platform_device *pdev = to_platform_device(dev);
struct usb_hcd *hcd = dev_get_drvdata(dev);
usb_ehci_au1xxx_remove(hcd, pdev);
return 0;
}
/*TBD*/
/*static int ehci_hcd_au1xxx_drv_suspend(struct device *dev)
{
struct platform_device *pdev = to_platform_device(dev);
struct usb_hcd *hcd = dev_get_drvdata(dev);
return 0;
}
static int ehci_hcd_au1xxx_drv_resume(struct device *dev)
{
struct platform_device *pdev = to_platform_device(dev);
struct usb_hcd *hcd = dev_get_drvdata(dev);
return 0;
}
*/
MODULE_ALIAS("au1xxx-ehci");
/* FIXME use "struct platform_driver" */
static struct device_driver ehci_hcd_au1xxx_driver = {
.name = "au1xxx-ehci",
.bus = &platform_bus_type,
.probe = ehci_hcd_au1xxx_drv_probe,
.remove = ehci_hcd_au1xxx_drv_remove,
/*.suspend = ehci_hcd_au1xxx_drv_suspend, */
/*.resume = ehci_hcd_au1xxx_drv_resume, */
};
|
