1// SPDX-License-Identifier: GPL-2.0-or-later
2/*
3 * DVB USB Linux driver for AME DTV-5100 USB2.0 DVB-T
4 *
5 * Copyright (C) 2008  Antoine Jacquet <royale@zerezo.com>
6 * http://royale.zerezo.com/dtv5100/
7 *
8 * Inspired by gl861.c and au6610.c drivers
9 */
10
11#include "dtv5100.h"
12#include "zl10353.h"
13#include "qt1010.h"
14
15/* debug */
16static int dvb_usb_dtv5100_debug;
17module_param_named(debug, dvb_usb_dtv5100_debug, int, 0644);
18MODULE_PARM_DESC(debug, "set debugging level" DVB_USB_DEBUG_STATUS);
19DVB_DEFINE_MOD_OPT_ADAPTER_NR(adapter_nr);
20
21struct dtv5100_state {
22	unsigned char data[80];
23};
24
25static int dtv5100_i2c_msg(struct dvb_usb_device *d, u8 addr,
26			   u8 *wbuf, u16 wlen, u8 *rbuf, u16 rlen)
27{
28	struct dtv5100_state *st = d->priv;
29	unsigned int pipe;
30	u8 request;
31	u8 type;
32	u16 value;
33	u16 index;
34
35	switch (wlen) {
36	case 1:
37		/* write { reg }, read { value } */
38		pipe = usb_rcvctrlpipe(d->udev, 0);
39		request = (addr == DTV5100_DEMOD_ADDR ? DTV5100_DEMOD_READ :
40							DTV5100_TUNER_READ);
41		type = USB_TYPE_VENDOR | USB_DIR_IN;
42		value = 0;
43		break;
44	case 2:
45		/* write { reg, value } */
46		pipe = usb_sndctrlpipe(d->udev, 0);
47		request = (addr == DTV5100_DEMOD_ADDR ? DTV5100_DEMOD_WRITE :
48							DTV5100_TUNER_WRITE);
49		type = USB_TYPE_VENDOR | USB_DIR_OUT;
50		value = wbuf[1];
51		break;
52	default:
53		warn("wlen = %x, aborting.", wlen);
54		return -EINVAL;
55	}
56	index = (addr << 8) + wbuf[0];
57
58	memcpy(st->data, rbuf, rlen);
59	msleep(1); /* avoid I2C errors */
60	return usb_control_msg(d->udev, pipe, request,
61			       type, value, index, st->data, rlen,
62			       DTV5100_USB_TIMEOUT);
63}
64
65/* I2C */
66static int dtv5100_i2c_xfer(struct i2c_adapter *adap, struct i2c_msg msg[],
67			    int num)
68{
69	struct dvb_usb_device *d = i2c_get_adapdata(adap);
70	int i;
71
72	if (num > 2)
73		return -EINVAL;
74
75	if (mutex_lock_interruptible(&d->i2c_mutex) < 0)
76		return -EAGAIN;
77
78	for (i = 0; i < num; i++) {
79		/* write/read request */
80		if (i+1 < num && (msg[i+1].flags & I2C_M_RD)) {
81			if (dtv5100_i2c_msg(d, msg[i].addr, msg[i].buf,
82					    msg[i].len, msg[i+1].buf,
83					    msg[i+1].len) < 0)
84				break;
85			i++;
86		} else if (dtv5100_i2c_msg(d, msg[i].addr, msg[i].buf,
87					   msg[i].len, NULL, 0) < 0)
88				break;
89	}
90
91	mutex_unlock(&d->i2c_mutex);
92	return i;
93}
94
95static u32 dtv5100_i2c_func(struct i2c_adapter *adapter)
96{
97	return I2C_FUNC_I2C;
98}
99
100static struct i2c_algorithm dtv5100_i2c_algo = {
101	.master_xfer   = dtv5100_i2c_xfer,
102	.functionality = dtv5100_i2c_func,
103};
104
105/* Callbacks for DVB USB */
106static struct zl10353_config dtv5100_zl10353_config = {
107	.demod_address = DTV5100_DEMOD_ADDR,
108	.no_tuner = 1,
109	.parallel_ts = 1,
110};
111
112static int dtv5100_frontend_attach(struct dvb_usb_adapter *adap)
113{
114	adap->fe_adap[0].fe = dvb_attach(zl10353_attach, &dtv5100_zl10353_config,
115			      &adap->dev->i2c_adap);
116	if (adap->fe_adap[0].fe == NULL)
117		return -EIO;
118
119	/* disable i2c gate, or it won't work... is this safe? */
120	adap->fe_adap[0].fe->ops.i2c_gate_ctrl = NULL;
121
122	return 0;
123}
124
125static struct qt1010_config dtv5100_qt1010_config = {
126	.i2c_address = DTV5100_TUNER_ADDR
127};
128
129static int dtv5100_tuner_attach(struct dvb_usb_adapter *adap)
130{
131	return dvb_attach(qt1010_attach,
132			  adap->fe_adap[0].fe, &adap->dev->i2c_adap,
133			  &dtv5100_qt1010_config) == NULL ? -ENODEV : 0;
134}
135
136/* DVB USB Driver stuff */
137static struct dvb_usb_device_properties dtv5100_properties;
138
139static int dtv5100_probe(struct usb_interface *intf,
140			 const struct usb_device_id *id)
141{
142	int i, ret;
143	struct usb_device *udev = interface_to_usbdev(intf);
144
145	/* initialize non qt1010/zl10353 part? */
146	for (i = 0; dtv5100_init[i].request; i++) {
147		ret = usb_control_msg(udev, usb_sndctrlpipe(udev, 0),
148				      dtv5100_init[i].request,
149				      USB_TYPE_VENDOR | USB_DIR_OUT,
150				      dtv5100_init[i].value,
151				      dtv5100_init[i].index, NULL, 0,
152				      DTV5100_USB_TIMEOUT);
153		if (ret)
154			return ret;
155	}
156
157	ret = dvb_usb_device_init(intf, &dtv5100_properties,
158				  THIS_MODULE, NULL, adapter_nr);
159	if (ret)
160		return ret;
161
162	return 0;
163}
164
165enum {
166	AME_DTV5100,
167};
168
169static struct usb_device_id dtv5100_table[] = {
170	DVB_USB_DEV(AME, AME_DTV5100),
171	{ }
172};
173
174MODULE_DEVICE_TABLE(usb, dtv5100_table);
175
176static struct dvb_usb_device_properties dtv5100_properties = {
177	.caps = DVB_USB_IS_AN_I2C_ADAPTER,
178	.usb_ctrl = DEVICE_SPECIFIC,
179
180	.size_of_priv = sizeof(struct dtv5100_state),
181
182	.num_adapters = 1,
183	.adapter = {{
184		.num_frontends = 1,
185		.fe = {{
186		.frontend_attach = dtv5100_frontend_attach,
187		.tuner_attach    = dtv5100_tuner_attach,
188
189		.stream = {
190			.type = USB_BULK,
191			.count = 8,
192			.endpoint = 0x82,
193			.u = {
194				.bulk = {
195					.buffersize = 4096,
196				}
197			}
198		},
199		}},
200	} },
201
202	.i2c_algo = &dtv5100_i2c_algo,
203
204	.num_device_descs = 1,
205	.devices = {
206		{
207			.name = "AME DTV-5100 USB2.0 DVB-T",
208			.cold_ids = { NULL },
209			.warm_ids = { &dtv5100_table[AME_DTV5100], NULL },
210		},
211	}
212};
213
214static struct usb_driver dtv5100_driver = {
215	.name		= "dvb_usb_dtv5100",
216	.probe		= dtv5100_probe,
217	.disconnect	= dvb_usb_device_exit,
218	.id_table	= dtv5100_table,
219};
220
221module_usb_driver(dtv5100_driver);
222
223MODULE_AUTHOR(DRIVER_AUTHOR);
224MODULE_DESCRIPTION(DRIVER_DESC);
225MODULE_LICENSE("GPL");
226