1// SPDX-License-Identifier: GPL-2.0-or-later
2/*
3 * DVB USB Linux driver for Alcor Micro AU6610 DVB-T USB2.0.
4 *
5 * Copyright (C) 2006 Antti Palosaari <crope@iki.fi>
6 */
7
8#include "au6610.h"
9#include "zl10353.h"
10#include "qt1010.h"
11
12DVB_DEFINE_MOD_OPT_ADAPTER_NR(adapter_nr);
13
14static int au6610_usb_msg(struct dvb_usb_device *d, u8 operation, u8 addr,
15			  u8 *wbuf, u16 wlen, u8 *rbuf, u16 rlen)
16{
17	int ret;
18	u16 index;
19	u8 *usb_buf;
20
21	/*
22	 * allocate enough for all known requests,
23	 * read returns 5 and write 6 bytes
24	 */
25	usb_buf = kmalloc(6, GFP_KERNEL);
26	if (!usb_buf)
27		return -ENOMEM;
28
29	switch (wlen) {
30	case 1:
31		index = wbuf[0] << 8;
32		break;
33	case 2:
34		index = wbuf[0] << 8;
35		index += wbuf[1];
36		break;
37	default:
38		dev_err(&d->udev->dev, "%s: wlen=%d, aborting\n",
39				KBUILD_MODNAME, wlen);
40		ret = -EINVAL;
41		goto error;
42	}
43
44	ret = usb_control_msg(d->udev, usb_rcvctrlpipe(d->udev, 0), operation,
45			      USB_TYPE_VENDOR|USB_DIR_IN, addr << 1, index,
46			      usb_buf, 6, AU6610_USB_TIMEOUT);
47
48	dvb_usb_dbg_usb_control_msg(d->udev, operation,
49			(USB_TYPE_VENDOR|USB_DIR_IN), addr << 1, index,
50			usb_buf, 6);
51
52	if (ret < 0)
53		goto error;
54
55	switch (operation) {
56	case AU6610_REQ_I2C_READ:
57	case AU6610_REQ_USB_READ:
58		/* requested value is always 5th byte in buffer */
59		rbuf[0] = usb_buf[4];
60	}
61error:
62	kfree(usb_buf);
63	return ret;
64}
65
66static int au6610_i2c_msg(struct dvb_usb_device *d, u8 addr,
67			  u8 *wbuf, u16 wlen, u8 *rbuf, u16 rlen)
68{
69	u8 request;
70	u8 wo = (rbuf == NULL || rlen == 0); /* write-only */
71
72	if (wo) {
73		request = AU6610_REQ_I2C_WRITE;
74	} else { /* rw */
75		request = AU6610_REQ_I2C_READ;
76	}
77
78	return au6610_usb_msg(d, request, addr, wbuf, wlen, rbuf, rlen);
79}
80
81
82/* I2C */
83static int au6610_i2c_xfer(struct i2c_adapter *adap, struct i2c_msg msg[],
84			   int num)
85{
86	struct dvb_usb_device *d = i2c_get_adapdata(adap);
87	int i;
88
89	if (num > 2)
90		return -EINVAL;
91
92	if (mutex_lock_interruptible(&d->i2c_mutex) < 0)
93		return -EAGAIN;
94
95	for (i = 0; i < num; i++) {
96		/* write/read request */
97		if (i+1 < num && (msg[i+1].flags & I2C_M_RD)) {
98			if (au6610_i2c_msg(d, msg[i].addr, msg[i].buf,
99					   msg[i].len, msg[i+1].buf,
100					   msg[i+1].len) < 0)
101				break;
102			i++;
103		} else if (au6610_i2c_msg(d, msg[i].addr, msg[i].buf,
104					       msg[i].len, NULL, 0) < 0)
105				break;
106	}
107
108	mutex_unlock(&d->i2c_mutex);
109	return i;
110}
111
112
113static u32 au6610_i2c_func(struct i2c_adapter *adapter)
114{
115	return I2C_FUNC_I2C;
116}
117
118static struct i2c_algorithm au6610_i2c_algo = {
119	.master_xfer   = au6610_i2c_xfer,
120	.functionality = au6610_i2c_func,
121};
122
123/* Callbacks for DVB USB */
124static struct zl10353_config au6610_zl10353_config = {
125	.demod_address = 0x0f,
126	.no_tuner = 1,
127	.parallel_ts = 1,
128};
129
130static int au6610_zl10353_frontend_attach(struct dvb_usb_adapter *adap)
131{
132	adap->fe[0] = dvb_attach(zl10353_attach, &au6610_zl10353_config,
133			&adap_to_d(adap)->i2c_adap);
134	if (adap->fe[0] == NULL)
135		return -ENODEV;
136
137	return 0;
138}
139
140static struct qt1010_config au6610_qt1010_config = {
141	.i2c_address = 0x62
142};
143
144static int au6610_qt1010_tuner_attach(struct dvb_usb_adapter *adap)
145{
146	return dvb_attach(qt1010_attach, adap->fe[0],
147			&adap_to_d(adap)->i2c_adap,
148			&au6610_qt1010_config) == NULL ? -ENODEV : 0;
149}
150
151static int au6610_init(struct dvb_usb_device *d)
152{
153	/* TODO: this functionality belongs likely to the streaming control */
154	/* bInterfaceNumber 0, bAlternateSetting 5 */
155	return usb_set_interface(d->udev, 0, 5);
156}
157
158static struct dvb_usb_device_properties au6610_props = {
159	.driver_name = KBUILD_MODNAME,
160	.owner = THIS_MODULE,
161	.adapter_nr = adapter_nr,
162
163	.i2c_algo = &au6610_i2c_algo,
164	.frontend_attach = au6610_zl10353_frontend_attach,
165	.tuner_attach = au6610_qt1010_tuner_attach,
166	.init = au6610_init,
167
168	.num_adapters = 1,
169	.adapter = {
170		{
171			.stream = DVB_USB_STREAM_ISOC(0x82, 5, 40, 942, 1),
172		},
173	},
174};
175
176static const struct usb_device_id au6610_id_table[] = {
177	{ DVB_USB_DEVICE(USB_VID_ALCOR_MICRO, USB_PID_SIGMATEK_DVB_110,
178		&au6610_props, "Sigmatek DVB-110", NULL) },
179	{ }
180};
181MODULE_DEVICE_TABLE(usb, au6610_id_table);
182
183static struct usb_driver au6610_driver = {
184	.name = KBUILD_MODNAME,
185	.id_table = au6610_id_table,
186	.probe = dvb_usbv2_probe,
187	.disconnect = dvb_usbv2_disconnect,
188	.suspend = dvb_usbv2_suspend,
189	.resume = dvb_usbv2_resume,
190	.reset_resume = dvb_usbv2_reset_resume,
191	.no_dynamic_id = 1,
192	.soft_unbind = 1,
193};
194
195module_usb_driver(au6610_driver);
196
197MODULE_AUTHOR("Antti Palosaari <crope@iki.fi>");
198MODULE_DESCRIPTION("Driver for Alcor Micro AU6610 DVB-T USB2.0");
199MODULE_VERSION("0.1");
200MODULE_LICENSE("GPL");
201