Merge branch 'for-linus' of master.kernel.org:/home/rmk/linux-2.6-arm
[linux-2.6] / drivers / media / dvb / dvb-usb / gl861.c
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 Free
5  *      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))." DVB_USB_DEBUG_STATUS);
18
19 static int gl861_i2c_msg(struct dvb_usb_device *d, u8 addr,
20                          u8 *wbuf, u16 wlen, u8 *rbuf, u16 rlen)
21 {
22         u16 index;
23         u16 value = addr << (8 + 1);
24         int wo = (rbuf == NULL || rlen == 0); /* write-only */
25         u8 req, type;
26
27         if (wo) {
28                 req = GL861_REQ_I2C_WRITE;
29                 type = GL861_WRITE;
30         } else { /* rw */
31                 req = GL861_REQ_I2C_READ;
32                 type = GL861_READ;
33         }
34
35         switch (wlen) {
36         case 1:
37                 index = wbuf[0];
38                 break;
39         case 2:
40                 index = wbuf[0];
41                 value = value + wbuf[1];
42                 break;
43         default:
44                 warn("wlen = %x, aborting.", wlen);
45                 return -EINVAL;
46         }
47
48         return usb_control_msg(d->udev, usb_rcvctrlpipe(d->udev, 0), req, type,
49                                value, index, rbuf, rlen, 2000);
50 }
51
52 /* I2C */
53 static int gl861_i2c_xfer(struct i2c_adapter *adap, struct i2c_msg msg[],
54                           int num)
55 {
56         struct dvb_usb_device *d = i2c_get_adapdata(adap);
57         int i;
58
59         if (mutex_lock_interruptible(&d->i2c_mutex) < 0)
60                 return -EAGAIN;
61
62         if (num > 2)
63                 return -EINVAL;
64
65         for (i = 0; i < num; i++) {
66                 /* write/read request */
67                 if (i+1 < num && (msg[i+1].flags & I2C_M_RD)) {
68                         if (gl861_i2c_msg(d, msg[i].addr, msg[i].buf,
69                                           msg[i].len, msg[i+1].buf, msg[i+1].len) < 0)
70                                 break;
71                         i++;
72                 } else
73                         if (gl861_i2c_msg(d, msg[i].addr, msg[i].buf,
74                                           msg[i].len, NULL, 0) < 0)
75                                 break;
76         }
77
78         mutex_unlock(&d->i2c_mutex);
79         return i;
80 }
81
82 static u32 gl861_i2c_func(struct i2c_adapter *adapter)
83 {
84         return I2C_FUNC_I2C;
85 }
86
87 static struct i2c_algorithm gl861_i2c_algo = {
88         .master_xfer   = gl861_i2c_xfer,
89         .functionality = gl861_i2c_func,
90 };
91
92 /* Callbacks for DVB USB */
93 static int gl861_identify_state(struct usb_device *udev,
94                                 struct dvb_usb_device_properties *props,
95                                 struct dvb_usb_device_description **desc,
96                                 int *cold)
97 {
98         *cold = 0;
99
100         return 0;
101 }
102
103 static struct zl10353_config gl861_zl10353_config = {
104         .demod_address = 0x0f,
105         .no_tuner = 1,
106         .parallel_ts = 1,
107 };
108
109 static int gl861_frontend_attach(struct dvb_usb_adapter *adap)
110 {
111         if ((adap->fe = dvb_attach(zl10353_attach, &gl861_zl10353_config,
112                                    &adap->dev->i2c_adap)) != NULL) {
113                 return 0;
114         }
115
116         return -EIO;
117 }
118
119 static struct qt1010_config gl861_qt1010_config = {
120         .i2c_address = 0x62
121 };
122
123 static int gl861_tuner_attach(struct dvb_usb_adapter *adap)
124 {
125         return dvb_attach(qt1010_attach,
126                           adap->fe, &adap->dev->i2c_adap,
127                           &gl861_qt1010_config) == NULL ? -ENODEV : 0;
128 }
129
130 /* DVB USB Driver stuff */
131 static struct dvb_usb_device_properties gl861_properties;
132
133 static int gl861_probe(struct usb_interface *intf,
134                        const struct usb_device_id *id)
135 {
136         struct dvb_usb_device *d;
137         struct usb_host_interface *alt;
138         int ret;
139
140         if (intf->num_altsetting < 2)
141                 return -ENODEV;
142
143         if ((ret = dvb_usb_device_init(intf, &gl861_properties, THIS_MODULE, &d)) == 0) {
144                 alt = usb_altnum_to_altsetting(intf, 0);
145
146                 if (alt == NULL) {
147                         deb_rc("not alt found!\n");
148                         return -ENODEV;
149                 }
150
151                 ret = usb_set_interface(d->udev, alt->desc.bInterfaceNumber,
152                                         alt->desc.bAlternateSetting);
153         }
154
155         return ret;
156 }
157
158 static struct usb_device_id gl861_table [] = {
159                 { USB_DEVICE(USB_VID_MSI, USB_PID_MSI_MEGASKY580_55801) },
160                 { }             /* Terminating entry */
161 };
162 MODULE_DEVICE_TABLE (usb, gl861_table);
163
164 static struct dvb_usb_device_properties gl861_properties = {
165         .caps = DVB_USB_IS_AN_I2C_ADAPTER,
166         .usb_ctrl = DEVICE_SPECIFIC,
167
168         .size_of_priv     = 0,
169
170         .identify_state   = gl861_identify_state,
171         .num_adapters = 1,
172         .adapter = {{
173
174                 .frontend_attach  = gl861_frontend_attach,
175                 .tuner_attach     = gl861_tuner_attach,
176
177                 .stream = {
178                         .type = USB_BULK,
179                         .count = 7,
180                         .endpoint = 0x81,
181                         .u = {
182                                 .bulk = {
183                                         .buffersize = 512,
184                                 }
185                         }
186                 },
187         }},
188         .i2c_algo         = &gl861_i2c_algo,
189
190         .num_device_descs = 1,
191         .devices = {
192                 {   "MSI Mega Sky 55801 DVB-T USB2.0",
193                         { &gl861_table[0], NULL },
194                         { NULL },
195                 },
196         }
197 };
198
199 static struct usb_driver gl861_driver = {
200         .name           = "dvb_usb_gl861",
201         .probe          = gl861_probe,
202         .disconnect     = dvb_usb_device_exit,
203         .id_table       = gl861_table,
204 };
205
206 /* module stuff */
207 static int __init gl861_module_init(void)
208 {
209         int ret;
210
211         if ((ret = usb_register(&gl861_driver))) {
212                 err("usb_register failed. Error number %d", ret);
213                 return ret;
214         }
215
216         return 0;
217 }
218
219 static void __exit gl861_module_exit(void)
220 {
221         /* deregister this driver from the USB subsystem */
222         usb_deregister(&gl861_driver);
223 }
224
225 module_init (gl861_module_init);
226 module_exit (gl861_module_exit);
227
228 MODULE_AUTHOR("Carl Lundqvist <comabug@gmail.com>");
229 MODULE_DESCRIPTION("Driver MSI Mega Sky 580 DVB-T USB2.0 / GL861");
230 MODULE_VERSION("0.1");
231 MODULE_LICENSE("GPL");