treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 157
[sfrench/cifs-2.6.git] / drivers / media / usb / dvb-usb-v2 / au6610.c
1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3  * DVB USB Linux driver for Alcor Micro AU6610 DVB-T USB2.0.
4  *
5  * Copyright (C) 2006 Antti Palosaari <crope@iki.fi>
6  */
7
8 #include "au6610.h"
9 #include "zl10353.h"
10 #include "qt1010.h"
11
12 DVB_DEFINE_MOD_OPT_ADAPTER_NR(adapter_nr);
13
14 static int au6610_usb_msg(struct dvb_usb_device *d, u8 operation, u8 addr,
15                           u8 *wbuf, u16 wlen, u8 *rbuf, u16 rlen)
16 {
17         int ret;
18         u16 index;
19         u8 *usb_buf;
20
21         /*
22          * allocate enough for all known requests,
23          * read returns 5 and write 6 bytes
24          */
25         usb_buf = kmalloc(6, GFP_KERNEL);
26         if (!usb_buf)
27                 return -ENOMEM;
28
29         switch (wlen) {
30         case 1:
31                 index = wbuf[0] << 8;
32                 break;
33         case 2:
34                 index = wbuf[0] << 8;
35                 index += wbuf[1];
36                 break;
37         default:
38                 dev_err(&d->udev->dev, "%s: wlen=%d, aborting\n",
39                                 KBUILD_MODNAME, wlen);
40                 ret = -EINVAL;
41                 goto error;
42         }
43
44         ret = usb_control_msg(d->udev, usb_rcvctrlpipe(d->udev, 0), operation,
45                               USB_TYPE_VENDOR|USB_DIR_IN, addr << 1, index,
46                               usb_buf, 6, AU6610_USB_TIMEOUT);
47
48         dvb_usb_dbg_usb_control_msg(d->udev, operation,
49                         (USB_TYPE_VENDOR|USB_DIR_IN), addr << 1, index,
50                         usb_buf, 6);
51
52         if (ret < 0)
53                 goto error;
54
55         switch (operation) {
56         case AU6610_REQ_I2C_READ:
57         case AU6610_REQ_USB_READ:
58                 /* requested value is always 5th byte in buffer */
59                 rbuf[0] = usb_buf[4];
60         }
61 error:
62         kfree(usb_buf);
63         return ret;
64 }
65
66 static int au6610_i2c_msg(struct dvb_usb_device *d, u8 addr,
67                           u8 *wbuf, u16 wlen, u8 *rbuf, u16 rlen)
68 {
69         u8 request;
70         u8 wo = (rbuf == NULL || rlen == 0); /* write-only */
71
72         if (wo) {
73                 request = AU6610_REQ_I2C_WRITE;
74         } else { /* rw */
75                 request = AU6610_REQ_I2C_READ;
76         }
77
78         return au6610_usb_msg(d, request, addr, wbuf, wlen, rbuf, rlen);
79 }
80
81
82 /* I2C */
83 static int au6610_i2c_xfer(struct i2c_adapter *adap, struct i2c_msg msg[],
84                            int num)
85 {
86         struct dvb_usb_device *d = i2c_get_adapdata(adap);
87         int i;
88
89         if (num > 2)
90                 return -EINVAL;
91
92         if (mutex_lock_interruptible(&d->i2c_mutex) < 0)
93                 return -EAGAIN;
94
95         for (i = 0; i < num; i++) {
96                 /* write/read request */
97                 if (i+1 < num && (msg[i+1].flags & I2C_M_RD)) {
98                         if (au6610_i2c_msg(d, msg[i].addr, msg[i].buf,
99                                            msg[i].len, msg[i+1].buf,
100                                            msg[i+1].len) < 0)
101                                 break;
102                         i++;
103                 } else if (au6610_i2c_msg(d, msg[i].addr, msg[i].buf,
104                                                msg[i].len, NULL, 0) < 0)
105                                 break;
106         }
107
108         mutex_unlock(&d->i2c_mutex);
109         return i;
110 }
111
112
113 static u32 au6610_i2c_func(struct i2c_adapter *adapter)
114 {
115         return I2C_FUNC_I2C;
116 }
117
118 static struct i2c_algorithm au6610_i2c_algo = {
119         .master_xfer   = au6610_i2c_xfer,
120         .functionality = au6610_i2c_func,
121 };
122
123 /* Callbacks for DVB USB */
124 static struct zl10353_config au6610_zl10353_config = {
125         .demod_address = 0x0f,
126         .no_tuner = 1,
127         .parallel_ts = 1,
128 };
129
130 static int au6610_zl10353_frontend_attach(struct dvb_usb_adapter *adap)
131 {
132         adap->fe[0] = dvb_attach(zl10353_attach, &au6610_zl10353_config,
133                         &adap_to_d(adap)->i2c_adap);
134         if (adap->fe[0] == NULL)
135                 return -ENODEV;
136
137         return 0;
138 }
139
140 static struct qt1010_config au6610_qt1010_config = {
141         .i2c_address = 0x62
142 };
143
144 static int au6610_qt1010_tuner_attach(struct dvb_usb_adapter *adap)
145 {
146         return dvb_attach(qt1010_attach, adap->fe[0],
147                         &adap_to_d(adap)->i2c_adap,
148                         &au6610_qt1010_config) == NULL ? -ENODEV : 0;
149 }
150
151 static int au6610_init(struct dvb_usb_device *d)
152 {
153         /* TODO: this functionality belongs likely to the streaming control */
154         /* bInterfaceNumber 0, bAlternateSetting 5 */
155         return usb_set_interface(d->udev, 0, 5);
156 }
157
158 static struct dvb_usb_device_properties au6610_props = {
159         .driver_name = KBUILD_MODNAME,
160         .owner = THIS_MODULE,
161         .adapter_nr = adapter_nr,
162
163         .i2c_algo = &au6610_i2c_algo,
164         .frontend_attach = au6610_zl10353_frontend_attach,
165         .tuner_attach = au6610_qt1010_tuner_attach,
166         .init = au6610_init,
167
168         .num_adapters = 1,
169         .adapter = {
170                 {
171                         .stream = DVB_USB_STREAM_ISOC(0x82, 5, 40, 942, 1),
172                 },
173         },
174 };
175
176 static const struct usb_device_id au6610_id_table[] = {
177         { DVB_USB_DEVICE(USB_VID_ALCOR_MICRO, USB_PID_SIGMATEK_DVB_110,
178                 &au6610_props, "Sigmatek DVB-110", NULL) },
179         { }
180 };
181 MODULE_DEVICE_TABLE(usb, au6610_id_table);
182
183 static struct usb_driver au6610_driver = {
184         .name = KBUILD_MODNAME,
185         .id_table = au6610_id_table,
186         .probe = dvb_usbv2_probe,
187         .disconnect = dvb_usbv2_disconnect,
188         .suspend = dvb_usbv2_suspend,
189         .resume = dvb_usbv2_resume,
190         .reset_resume = dvb_usbv2_reset_resume,
191         .no_dynamic_id = 1,
192         .soft_unbind = 1,
193 };
194
195 module_usb_driver(au6610_driver);
196
197 MODULE_AUTHOR("Antti Palosaari <crope@iki.fi>");
198 MODULE_DESCRIPTION("Driver for Alcor Micro AU6610 DVB-T USB2.0");
199 MODULE_VERSION("0.1");
200 MODULE_LICENSE("GPL");