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 */
16 static int dvb_usb_dtv5100_debug;
17 module_param_named(debug, dvb_usb_dtv5100_debug, int, 0644);
18 MODULE_PARM_DESC(debug, "set debugging level" DVB_USB_DEBUG_STATUS);
19 DVB_DEFINE_MOD_OPT_ADAPTER_NR(adapter_nr);
20
21 struct dtv5100_state {
22 unsigned char data[80];
23 };
24
dtv5100_i2c_msg(struct dvb_usb_device * d,u8 addr,u8 * wbuf,u16 wlen,u8 * rbuf,u16 rlen)25 static 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 */
dtv5100_i2c_xfer(struct i2c_adapter * adap,struct i2c_msg msg[],int num)66 static 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
dtv5100_i2c_func(struct i2c_adapter * adapter)95 static u32 dtv5100_i2c_func(struct i2c_adapter *adapter)
96 {
97 return I2C_FUNC_I2C;
98 }
99
100 static struct i2c_algorithm dtv5100_i2c_algo = {
101 .master_xfer = dtv5100_i2c_xfer,
102 .functionality = dtv5100_i2c_func,
103 };
104
105 /* Callbacks for DVB USB */
106 static struct zl10353_config dtv5100_zl10353_config = {
107 .demod_address = DTV5100_DEMOD_ADDR,
108 .no_tuner = 1,
109 .parallel_ts = 1,
110 };
111
dtv5100_frontend_attach(struct dvb_usb_adapter * adap)112 static 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
125 static struct qt1010_config dtv5100_qt1010_config = {
126 .i2c_address = DTV5100_TUNER_ADDR
127 };
128
dtv5100_tuner_attach(struct dvb_usb_adapter * adap)129 static 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 */
137 static struct dvb_usb_device_properties dtv5100_properties;
138
dtv5100_probe(struct usb_interface * intf,const struct usb_device_id * id)139 static 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
165 enum {
166 AME_DTV5100,
167 };
168
169 static struct usb_device_id dtv5100_table[] = {
170 DVB_USB_DEV(AME, AME_DTV5100),
171 { }
172 };
173
174 MODULE_DEVICE_TABLE(usb, dtv5100_table);
175
176 static 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
214 static 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
221 module_usb_driver(dtv5100_driver);
222
223 MODULE_AUTHOR(DRIVER_AUTHOR);
224 MODULE_DESCRIPTION(DRIVER_DESC);
225 MODULE_LICENSE("GPL");
226