1 /* DVB USB compliant linux driver for GL861 USB2.0 devices.
2 *
3 * This program is free software; you can redistribute it and/or modify it
4 * under the terms of the GNU General Public License as published by the
5 * Free Software Foundation, version 2.
6 *
7 * see Documentation/dvb/README.dvb-usb for more information
8 */
9 #include "gl861.h"
10
11 #include "zl10353.h"
12 #include "qt1010.h"
13
14 /* debug */
15 static int dvb_usb_gl861_debug;
16 module_param_named(debug, dvb_usb_gl861_debug, int, 0644);
17 MODULE_PARM_DESC(debug, "set debugging level (1=rc (or-able))."
18 DVB_USB_DEBUG_STATUS);
19 DVB_DEFINE_MOD_OPT_ADAPTER_NR(adapter_nr);
20
21 static int gl861_i2c_msg(struct dvb_usb_device *d, u8 addr,
22 u8 *wbuf, u16 wlen, u8 *rbuf, u16 rlen)
23 {
24 u16 index;
25 u16 value = addr << (8 + 1);
26 int wo = (rbuf == NULL || rlen == 0); /* write-only */
27 u8 req, type;
28
29 if (wo) {
30 req = GL861_REQ_I2C_WRITE;
31 type = GL861_WRITE;
32 } else { /* rw */
33 req = GL861_REQ_I2C_READ;
34 type = GL861_READ;
35 }
36
37 switch (wlen) {
38 case 1:
39 index = wbuf[0];
40 break;
41 case 2:
42 index = wbuf[0];
43 value = value + wbuf[1];
44 break;
45 default:
46 warn("wlen = %x, aborting.", wlen);
47 return -EINVAL;
48 }
49
50 msleep(1); /* avoid I2C errors */
51
52 return usb_control_msg(d->udev, usb_rcvctrlpipe(d->udev, 0), req, type,
53 value, index, rbuf, rlen, 2000);
54 }
55
56 /* I2C */
57 static int gl861_i2c_xfer(struct i2c_adapter *adap, struct i2c_msg msg[],
58 int num)
59 {
60 struct dvb_usb_device *d = i2c_get_adapdata(adap);
61 int i;
62
63 if (num > 2)
64 return -EINVAL;
65
66 if (mutex_lock_interruptible(&d->i2c_mutex) < 0)
67 return -EAGAIN;
68
69 for (i = 0; i < num; i++) {
70 /* write/read request */
71 if (i+1 < num && (msg[i+1].flags & I2C_M_RD)) {
72 if (gl861_i2c_msg(d, msg[i].addr, msg[i].buf,
73 msg[i].len, msg[i+1].buf, msg[i+1].len) < 0)
74 break;
75 i++;
76 } else
77 if (gl861_i2c_msg(d, msg[i].addr, msg[i].buf,
78 msg[i].len, NULL, 0) < 0)
79 break;
80 }
81
82 mutex_unlock(&d->i2c_mutex);
83 return i;
84 }
85
86 static u32 gl861_i2c_func(struct i2c_adapter *adapter)
87 {
88 return I2C_FUNC_I2C;
89 }
90
91 static struct i2c_algorithm gl861_i2c_algo = {
92 .master_xfer = gl861_i2c_xfer,
93 .functionality = gl861_i2c_func,
94 };
95
96 /* Callbacks for DVB USB */
97 static struct zl10353_config gl861_zl10353_config = {
98 .demod_address = 0x0f,
99 .no_tuner = 1,
100 .parallel_ts = 1,
101 };
102
103 static int gl861_frontend_attach(struct dvb_usb_adapter *adap)
104 {
105
106 adap->fe = dvb_attach(zl10353_attach, &gl861_zl10353_config,
107 &adap->dev->i2c_adap);
108 if (adap->fe == NULL)
109 return -EIO;
110
111 return 0;
112 }
113
114 static struct qt1010_config gl861_qt1010_config = {
115 .i2c_address = 0x62
116 };
117
118 static int gl861_tuner_attach(struct dvb_usb_adapter *adap)
119 {
120 return dvb_attach(qt1010_attach,
121 adap->fe, &adap->dev->i2c_adap,
122 &gl861_qt1010_config) == NULL ? -ENODEV : 0;
123 }
124
125 /* DVB USB Driver stuff */
126 static struct dvb_usb_device_properties gl861_properties;
127
128 static int gl861_probe(struct usb_interface *intf,
129 const struct usb_device_id *id)
130 {
131 struct dvb_usb_device *d;
132 struct usb_host_interface *alt;
133 int ret;
134
135 if (intf->num_altsetting < 2)
136 return -ENODEV;
137
138 ret = dvb_usb_device_init(intf, &gl861_properties, THIS_MODULE, &d,
139 adapter_nr);
140 if (ret == 0) {
141 alt = usb_altnum_to_altsetting(intf, 0);
142
143 if (alt == NULL) {
144 deb_rc("not alt found!\n");
145 return -ENODEV;
146 }
147
148 ret = usb_set_interface(d->udev, alt->desc.bInterfaceNumber,
149 alt->desc.bAlternateSetting);
150 }
151
152 return ret;
153 }
154
155 static struct usb_device_id gl861_table [] = {
156 { USB_DEVICE(USB_VID_MSI, USB_PID_MSI_MEGASKY580_55801) },
157 { USB_DEVICE(USB_VID_ALINK, USB_VID_ALINK_DTU) },
158 { } /* Terminating entry */
159 };
160 MODULE_DEVICE_TABLE(usb, gl861_table);
161
162 static struct dvb_usb_device_properties gl861_properties = {
163 .caps = DVB_USB_IS_AN_I2C_ADAPTER,
164 .usb_ctrl = DEVICE_SPECIFIC,
165
166 .size_of_priv = 0,
167
168 .num_adapters = 1,
169 .adapter = {{
170
171 .frontend_attach = gl861_frontend_attach,
172 .tuner_attach = gl861_tuner_attach,
173
174 .stream = {
175 .type = USB_BULK,
176 .count = 7,
177 .endpoint = 0x81,
178 .u = {
179 .bulk = {
180 .buffersize = 512,
181 }
182 }
183 },
184 } },
185 .i2c_algo = &gl861_i2c_algo,
186
187 .num_device_descs = 2,
188 .devices = {
189 {
190 .name = "MSI Mega Sky 55801 DVB-T USB2.0",
191 .cold_ids = { NULL },
192 .warm_ids = { &gl861_table[0], NULL },
193 },
194 {
195 .name = "A-LINK DTU DVB-T USB2.0",
196 .cold_ids = { NULL },
197 .warm_ids = { &gl861_table[1], NULL },
198 },
199 }
200 };
201
202 static struct usb_driver gl861_driver = {
203 .name = "dvb_usb_gl861",
204 .probe = gl861_probe,
205 .disconnect = dvb_usb_device_exit,
206 .id_table = gl861_table,
207 };
208
209 /* module stuff */
210 static int __init gl861_module_init(void)
211 {
212 int ret;
213
214 ret = usb_register(&gl861_driver);
215 if (ret)
216 err("usb_register failed. Error number %d", ret);
217
218 return ret;
219 }
220
221 static void __exit gl861_module_exit(void)
222 {
223 /* deregister this driver from the USB subsystem */
224 usb_deregister(&gl861_driver);
225 }
226
227 module_init(gl861_module_init);
228 module_exit(gl861_module_exit);
229
230 MODULE_AUTHOR("Carl Lundqvist <comabug@gmail.com>");
231 MODULE_DESCRIPTION("Driver MSI Mega Sky 580 DVB-T USB2.0 / GL861");
232 MODULE_VERSION("0.1");
233 MODULE_LICENSE("GPL");
234
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