dtv5100.c

  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	if (rlen > sizeof(st->data)) {
 59		warn("rlen = %x is too big!\n", rlen);
 60		return -EINVAL;
 61	}
 62
 63	memcpy(st->data, rbuf, rlen);
 64	msleep(1); /* avoid I2C errors */
 65	return usb_control_msg(d->udev, pipe, request,
 66			       type, value, index, st->data, rlen,
 67			       DTV5100_USB_TIMEOUT);
 68}
 69
 70/* I2C */
 71static int dtv5100_i2c_xfer(struct i2c_adapter *adap, struct i2c_msg msg[],
 72			    int num)
 73{
 74	struct dvb_usb_device *d = i2c_get_adapdata(adap);
 75	int i;
 76
 77	if (num > 2)
 78		return -EINVAL;
 79
 80	if (mutex_lock_interruptible(&d->i2c_mutex) < 0)
 81		return -EAGAIN;
 82
 83	for (i = 0; i < num; i++) {
 84		/* write/read request */
 85		if (i+1 < num && (msg[i+1].flags & I2C_M_RD)) {
 86			if (dtv5100_i2c_msg(d, msg[i].addr, msg[i].buf,
 87					    msg[i].len, msg[i+1].buf,
 88					    msg[i+1].len) < 0)
 89				break;
 90			i++;
 91		} else if (dtv5100_i2c_msg(d, msg[i].addr, msg[i].buf,
 92					   msg[i].len, NULL, 0) < 0)
 93				break;
 94	}
 95
 96	mutex_unlock(&d->i2c_mutex);
 97	return i;
 98}
 99
100static u32 dtv5100_i2c_func(struct i2c_adapter *adapter)
101{
102	return I2C_FUNC_I2C;
103}
104
105static const struct i2c_algorithm dtv5100_i2c_algo = {
106	.master_xfer   = dtv5100_i2c_xfer,
107	.functionality = dtv5100_i2c_func,
108};
109
110/* Callbacks for DVB USB */
111static struct zl10353_config dtv5100_zl10353_config = {
112	.demod_address = DTV5100_DEMOD_ADDR,
113	.no_tuner = 1,
114	.parallel_ts = 1,
115};
116
117static int dtv5100_frontend_attach(struct dvb_usb_adapter *adap)
118{
119	adap->fe_adap[0].fe = dvb_attach(zl10353_attach, &dtv5100_zl10353_config,
120			      &adap->dev->i2c_adap);
121	if (adap->fe_adap[0].fe == NULL)
122		return -EIO;
123
124	/* disable i2c gate, or it won't work... is this safe? */
125	adap->fe_adap[0].fe->ops.i2c_gate_ctrl = NULL;
126
127	return 0;
128}
129
130static struct qt1010_config dtv5100_qt1010_config = {
131	.i2c_address = DTV5100_TUNER_ADDR
132};
133
134static int dtv5100_tuner_attach(struct dvb_usb_adapter *adap)
135{
136	return dvb_attach(qt1010_attach,
137			  adap->fe_adap[0].fe, &adap->dev->i2c_adap,
138			  &dtv5100_qt1010_config) == NULL ? -ENODEV : 0;
139}
140
141/* DVB USB Driver stuff */
142static struct dvb_usb_device_properties dtv5100_properties;
143
144static int dtv5100_probe(struct usb_interface *intf,
145			 const struct usb_device_id *id)
146{
147	int i, ret;
148	struct usb_device *udev = interface_to_usbdev(intf);
149
150	/* initialize non qt1010/zl10353 part? */
151	for (i = 0; dtv5100_init[i].request; i++) {
152		ret = usb_control_msg(udev, usb_sndctrlpipe(udev, 0),
153				      dtv5100_init[i].request,
154				      USB_TYPE_VENDOR | USB_DIR_OUT,
155				      dtv5100_init[i].value,
156				      dtv5100_init[i].index, NULL, 0,
157				      DTV5100_USB_TIMEOUT);
158		if (ret)
159			return ret;
160	}
161
162	ret = dvb_usb_device_init(intf, &dtv5100_properties,
163				  THIS_MODULE, NULL, adapter_nr);
164	if (ret)
165		return ret;
166
167	return 0;
168}
169
170enum {
171	AME_DTV5100,
172};
173
174static const struct usb_device_id dtv5100_table[] = {
175	DVB_USB_DEV(AME, AME_DTV5100),
176	{ }
177};
178
179MODULE_DEVICE_TABLE(usb, dtv5100_table);
180
181static struct dvb_usb_device_properties dtv5100_properties = {
182	.caps = DVB_USB_IS_AN_I2C_ADAPTER,
183	.usb_ctrl = DEVICE_SPECIFIC,
184
185	.size_of_priv = sizeof(struct dtv5100_state),
186
187	.num_adapters = 1,
188	.adapter = {{
189		.num_frontends = 1,
190		.fe = {{
191		.frontend_attach = dtv5100_frontend_attach,
192		.tuner_attach    = dtv5100_tuner_attach,
193
194		.stream = {
195			.type = USB_BULK,
196			.count = 8,
197			.endpoint = 0x82,
198			.u = {
199				.bulk = {
200					.buffersize = 4096,
201				}
202			}
203		},
204		}},
205	} },
206
207	.i2c_algo = &dtv5100_i2c_algo,
208
209	.num_device_descs = 1,
210	.devices = {
211		{
212			.name = "AME DTV-5100 USB2.0 DVB-T",
213			.cold_ids = { NULL },
214			.warm_ids = { &dtv5100_table[AME_DTV5100], NULL },
215		},
216	}
217};
218
219static struct usb_driver dtv5100_driver = {
220	.name		= "dvb_usb_dtv5100",
221	.probe		= dtv5100_probe,
222	.disconnect	= dvb_usb_device_exit,
223	.id_table	= dtv5100_table,
224};
225
226module_usb_driver(dtv5100_driver);
227
228MODULE_AUTHOR(DRIVER_AUTHOR);
229MODULE_DESCRIPTION(DRIVER_DESC);
230MODULE_LICENSE("GPL");