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
|
// SPDX-License-Identifier: GPL-2.0+
/*
* c67x00-drv.c: Cypress C67X00 USB Common infrastructure
*
* Copyright (C) 2006-2008 Barco N.V.
* Derived from the Cypress cy7c67200/300 ezusb linux driver and
* based on multiple host controller drivers inside the linux kernel.
*/
/*
* This file implements the common infrastructure for using the c67x00.
* It is both the link between the platform configuration and subdrivers and
* the link between the common hardware parts and the subdrivers (e.g.
* interrupt handling).
*
* The c67x00 has 2 SIE's (serial interface engine) which can be configured
* to be host, device or OTG (with some limitations, E.G. only SIE1 can be OTG).
*
* Depending on the platform configuration, the SIE's are created and
* the corresponding subdriver is initialized (c67x00_probe_sie).
*/
#include <linux/device.h>
#include <linux/io.h>
#include <linux/list.h>
#include <linux/slab.h>
#include <linux/module.h>
#include <linux/usb.h>
#include <linux/usb/c67x00.h>
#include "c67x00.h"
#include "c67x00-hcd.h"
static void c67x00_probe_sie(struct c67x00_sie *sie,
struct c67x00_device *dev, int sie_num)
{
spin_lock_init(&sie->lock);
sie->dev = dev;
sie->sie_num = sie_num;
sie->mode = c67x00_sie_config(dev->pdata->sie_config, sie_num);
switch (sie->mode) {
case C67X00_SIE_HOST:
c67x00_hcd_probe(sie);
break;
case C67X00_SIE_UNUSED:
dev_info(sie_dev(sie),
"Not using SIE %d as requested\n", sie->sie_num);
break;
default:
dev_err(sie_dev(sie),
"Unsupported configuration: 0x%x for SIE %d\n",
sie->mode, sie->sie_num);
break;
}
}
static void c67x00_remove_sie(struct c67x00_sie *sie)
{
switch (sie->mode) {
case C67X00_SIE_HOST:
c67x00_hcd_remove(sie);
break;
default:
break;
}
}
static irqreturn_t c67x00_irq(int irq, void *__dev)
{
struct c67x00_device *c67x00 = __dev;
struct c67x00_sie *sie;
u16 msg, int_status;
int i, count = 8;
int_status = c67x00_ll_hpi_status(c67x00);
if (!int_status)
return IRQ_NONE;
while (int_status != 0 && (count-- >= 0)) {
c67x00_ll_irq(c67x00, int_status);
for (i = 0; i < C67X00_SIES; i++) {
sie = &c67x00->sie[i];
msg = 0;
if (int_status & SIEMSG_FLG(i))
msg = c67x00_ll_fetch_siemsg(c67x00, i);
if (sie->irq)
sie->irq(sie, int_status, msg);
}
int_status = c67x00_ll_hpi_status(c67x00);
}
if (int_status)
dev_warn(&c67x00->pdev->dev, "Not all interrupts handled! "
"status = 0x%04x\n", int_status);
return IRQ_HANDLED;
}
/* ------------------------------------------------------------------------- */
static int c67x00_drv_probe(struct platform_device *pdev)
{
struct c67x00_device *c67x00;
struct c67x00_platform_data *pdata;
struct resource *res, *res2;
int ret, i;
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
if (!res)
return -ENODEV;
res2 = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
if (!res2)
return -ENODEV;
pdata = dev_get_platdata(&pdev->dev);
if (!pdata)
return -ENODEV;
c67x00 = kzalloc(sizeof(*c67x00), GFP_KERNEL);
if (!c67x00)
return -ENOMEM;
if (!request_mem_region(res->start, resource_size(res),
pdev->name)) {
dev_err(&pdev->dev, "Memory region busy\n");
ret = -EBUSY;
goto request_mem_failed;
}
c67x00->hpi.base = ioremap(res->start, resource_size(res));
if (!c67x00->hpi.base) {
dev_err(&pdev->dev, "Unable to map HPI registers\n");
ret = -EIO;
goto map_failed;
}
spin_lock_init(&c67x00->hpi.lock);
c67x00->hpi.regstep = pdata->hpi_regstep;
c67x00->pdata = dev_get_platdata(&pdev->dev);
c67x00->pdev = pdev;
c67x00_ll_init(c67x00);
c67x00_ll_hpi_reg_init(c67x00);
ret = request_irq(res2->start, c67x00_irq, 0, pdev->name, c67x00);
if (ret) {
dev_err(&pdev->dev, "Cannot claim IRQ\n");
goto request_irq_failed;
}
ret = c67x00_ll_reset(c67x00);
if (ret) {
dev_err(&pdev->dev, "Device reset failed\n");
goto reset_failed;
}
for (i = 0; i < C67X00_SIES; i++)
c67x00_probe_sie(&c67x00->sie[i], c67x00, i);
platform_set_drvdata(pdev, c67x00);
return 0;
reset_failed:
free_irq(res2->start, c67x00);
request_irq_failed:
iounmap(c67x00->hpi.base);
map_failed:
release_mem_region(res->start, resource_size(res));
request_mem_failed:
kfree(c67x00);
return ret;
}
static void c67x00_drv_remove(struct platform_device *pdev)
{
struct c67x00_device *c67x00 = platform_get_drvdata(pdev);
struct resource *res;
int i;
for (i = 0; i < C67X00_SIES; i++)
c67x00_remove_sie(&c67x00->sie[i]);
c67x00_ll_release(c67x00);
res = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
free_irq(res->start, c67x00);
iounmap(c67x00->hpi.base);
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
release_mem_region(res->start, resource_size(res));
kfree(c67x00);
}
static struct platform_driver c67x00_driver = {
.probe = c67x00_drv_probe,
.remove_new = c67x00_drv_remove,
.driver = {
.name = "c67x00",
},
};
module_platform_driver(c67x00_driver);
MODULE_AUTHOR("Peter Korsgaard, Jan Veldeman, Grant Likely");
MODULE_DESCRIPTION("Cypress C67X00 USB Controller Driver");
MODULE_LICENSE("GPL");
MODULE_ALIAS("platform:c67x00");
|
