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 */
15static int dvb_usb_gl861_debug;
16module_param_named(debug,dvb_usb_gl861_debug, int, 0644);
17MODULE_PARM_DESC(debug, "set debugging level (1=rc (or-able))." DVB_USB_DEBUG_STATUS);
18
19static 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 */
53static 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
82static u32 gl861_i2c_func(struct i2c_adapter *adapter)
83{
84	return I2C_FUNC_I2C;
85}
86
87static struct i2c_algorithm gl861_i2c_algo = {
88	.master_xfer   = gl861_i2c_xfer,
89	.functionality = gl861_i2c_func,
90};
91
92/* Callbacks for DVB USB */
93static 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
103static struct zl10353_config gl861_zl10353_config = {
104	.demod_address = 0x0f,
105	.no_tuner = 1,
106	.parallel_ts = 1,
107};
108
109static 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
119static struct qt1010_config gl861_qt1010_config = {
120	.i2c_address = 0x62
121};
122
123static 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 */
131static struct dvb_usb_device_properties gl861_properties;
132
133static 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
158static struct usb_device_id gl861_table [] = {
159		{ USB_DEVICE(USB_VID_MSI, USB_PID_MSI_MEGASKY580_55801) },
160		{ }		/* Terminating entry */
161};
162MODULE_DEVICE_TABLE (usb, gl861_table);
163
164static 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
199static 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 */
207static 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
219static void __exit gl861_module_exit(void)
220{
221	/* deregister this driver from the USB subsystem */
222	usb_deregister(&gl861_driver);
223}
224
225module_init (gl861_module_init);
226module_exit (gl861_module_exit);
227
228MODULE_AUTHOR("Carl Lundqvist <comabug@gmail.com>");
229MODULE_DESCRIPTION("Driver MSI Mega Sky 580 DVB-T USB2.0 / GL861");
230MODULE_VERSION("0.1");
231MODULE_LICENSE("GPL");
232