1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3  * Intel CE6230 DVB USB driver
4  *
5  * Copyright (C) 2009 Antti Palosaari <crope@iki.fi>
6  */
7 
8 #include "ce6230.h"
9 
10 DVB_DEFINE_MOD_OPT_ADAPTER_NR(adapter_nr);
11 
12 static int ce6230_ctrl_msg(struct dvb_usb_device *d, struct usb_req *req)
13 {
14 	int ret;
15 	unsigned int pipe;
16 	u8 request;
17 	u8 requesttype;
18 	u16 value;
19 	u16 index;
20 	u8 *buf;
21 
22 	request = req->cmd;
23 	value = req->value;
24 	index = req->index;
25 
26 	switch (req->cmd) {
27 	case I2C_READ:
28 	case DEMOD_READ:
29 	case REG_READ:
30 		requesttype = (USB_TYPE_VENDOR | USB_DIR_IN);
31 		break;
32 	case I2C_WRITE:
33 	case DEMOD_WRITE:
34 	case REG_WRITE:
35 		requesttype = (USB_TYPE_VENDOR | USB_DIR_OUT);
36 		break;
37 	default:
38 		dev_err(&d->udev->dev, "%s: unknown command=%02x\n",
39 				KBUILD_MODNAME, req->cmd);
40 		ret = -EINVAL;
41 		goto error;
42 	}
43 
44 	buf = kmalloc(req->data_len, GFP_KERNEL);
45 	if (!buf) {
46 		ret = -ENOMEM;
47 		goto error;
48 	}
49 
50 	if (requesttype == (USB_TYPE_VENDOR | USB_DIR_OUT)) {
51 		/* write */
52 		memcpy(buf, req->data, req->data_len);
53 		pipe = usb_sndctrlpipe(d->udev, 0);
54 	} else {
55 		/* read */
56 		pipe = usb_rcvctrlpipe(d->udev, 0);
57 	}
58 
59 	msleep(1); /* avoid I2C errors */
60 
61 	ret = usb_control_msg(d->udev, pipe, request, requesttype, value, index,
62 			buf, req->data_len, CE6230_USB_TIMEOUT);
63 
64 	dvb_usb_dbg_usb_control_msg(d->udev, request, requesttype, value, index,
65 			buf, req->data_len);
66 
67 	if (ret < 0)
68 		dev_err(&d->udev->dev, "%s: usb_control_msg() failed=%d\n",
69 				KBUILD_MODNAME, ret);
70 	else
71 		ret = 0;
72 
73 	/* read request, copy returned data to return buf */
74 	if (!ret && requesttype == (USB_TYPE_VENDOR | USB_DIR_IN))
75 		memcpy(req->data, buf, req->data_len);
76 
77 	kfree(buf);
78 error:
79 	return ret;
80 }
81 
82 /* I2C */
83 static struct zl10353_config ce6230_zl10353_config;
84 
85 static int ce6230_i2c_master_xfer(struct i2c_adapter *adap,
86 		struct i2c_msg msg[], int num)
87 {
88 	struct dvb_usb_device *d = i2c_get_adapdata(adap);
89 	int ret = 0, i = 0;
90 	struct usb_req req;
91 
92 	if (num > 2)
93 		return -EOPNOTSUPP;
94 
95 	memset(&req, 0, sizeof(req));
96 
97 	if (mutex_lock_interruptible(&d->i2c_mutex) < 0)
98 		return -EAGAIN;
99 
100 	while (i < num) {
101 		if (num > i + 1 && (msg[i+1].flags & I2C_M_RD)) {
102 			if (msg[i].addr ==
103 				ce6230_zl10353_config.demod_address) {
104 				if (msg[i].len < 1) {
105 					i = -EOPNOTSUPP;
106 					break;
107 				}
108 				req.cmd = DEMOD_READ;
109 				req.value = msg[i].addr >> 1;
110 				req.index = msg[i].buf[0];
111 				req.data_len = msg[i+1].len;
112 				req.data = &msg[i+1].buf[0];
113 				ret = ce6230_ctrl_msg(d, &req);
114 			} else {
115 				dev_err(&d->udev->dev, "%s: I2C read not " \
116 						"implemented\n",
117 						KBUILD_MODNAME);
118 				ret = -EOPNOTSUPP;
119 			}
120 			i += 2;
121 		} else {
122 			if (msg[i].addr ==
123 				ce6230_zl10353_config.demod_address) {
124 				if (msg[i].len < 1) {
125 					i = -EOPNOTSUPP;
126 					break;
127 				}
128 				req.cmd = DEMOD_WRITE;
129 				req.value = msg[i].addr >> 1;
130 				req.index = msg[i].buf[0];
131 				req.data_len = msg[i].len-1;
132 				req.data = &msg[i].buf[1];
133 				ret = ce6230_ctrl_msg(d, &req);
134 			} else {
135 				req.cmd = I2C_WRITE;
136 				req.value = 0x2000 + (msg[i].addr >> 1);
137 				req.index = 0x0000;
138 				req.data_len = msg[i].len;
139 				req.data = &msg[i].buf[0];
140 				ret = ce6230_ctrl_msg(d, &req);
141 			}
142 			i += 1;
143 		}
144 		if (ret)
145 			break;
146 	}
147 
148 	mutex_unlock(&d->i2c_mutex);
149 	return ret ? ret : i;
150 }
151 
152 static u32 ce6230_i2c_functionality(struct i2c_adapter *adapter)
153 {
154 	return I2C_FUNC_I2C;
155 }
156 
157 static struct i2c_algorithm ce6230_i2c_algorithm = {
158 	.master_xfer   = ce6230_i2c_master_xfer,
159 	.functionality = ce6230_i2c_functionality,
160 };
161 
162 /* Callbacks for DVB USB */
163 static struct zl10353_config ce6230_zl10353_config = {
164 	.demod_address = 0x1e,
165 	.adc_clock = 450000,
166 	.if2 = 45700,
167 	.no_tuner = 1,
168 	.parallel_ts = 1,
169 	.clock_ctl_1 = 0x34,
170 	.pll_0 = 0x0e,
171 };
172 
173 static int ce6230_zl10353_frontend_attach(struct dvb_usb_adapter *adap)
174 {
175 	struct dvb_usb_device *d = adap_to_d(adap);
176 
177 	dev_dbg(&d->udev->dev, "%s:\n", __func__);
178 
179 	adap->fe[0] = dvb_attach(zl10353_attach, &ce6230_zl10353_config,
180 			&d->i2c_adap);
181 	if (adap->fe[0] == NULL)
182 		return -ENODEV;
183 
184 	return 0;
185 }
186 
187 static struct mxl5005s_config ce6230_mxl5003s_config = {
188 	.i2c_address     = 0xc6,
189 	.if_freq         = IF_FREQ_4570000HZ,
190 	.xtal_freq       = CRYSTAL_FREQ_16000000HZ,
191 	.agc_mode        = MXL_SINGLE_AGC,
192 	.tracking_filter = MXL_TF_DEFAULT,
193 	.rssi_enable     = MXL_RSSI_ENABLE,
194 	.cap_select      = MXL_CAP_SEL_ENABLE,
195 	.div_out         = MXL_DIV_OUT_4,
196 	.clock_out       = MXL_CLOCK_OUT_DISABLE,
197 	.output_load     = MXL5005S_IF_OUTPUT_LOAD_200_OHM,
198 	.top		 = MXL5005S_TOP_25P2,
199 	.mod_mode        = MXL_DIGITAL_MODE,
200 	.if_mode         = MXL_ZERO_IF,
201 	.AgcMasterByte   = 0x00,
202 };
203 
204 static int ce6230_mxl5003s_tuner_attach(struct dvb_usb_adapter *adap)
205 {
206 	struct dvb_usb_device *d = adap_to_d(adap);
207 	int ret;
208 
209 	dev_dbg(&d->udev->dev, "%s:\n", __func__);
210 
211 	ret = dvb_attach(mxl5005s_attach, adap->fe[0], &d->i2c_adap,
212 			&ce6230_mxl5003s_config) == NULL ? -ENODEV : 0;
213 	return ret;
214 }
215 
216 static int ce6230_power_ctrl(struct dvb_usb_device *d, int onoff)
217 {
218 	int ret;
219 
220 	dev_dbg(&d->udev->dev, "%s: onoff=%d\n", __func__, onoff);
221 
222 	/* InterfaceNumber 1 / AlternateSetting 0     idle
223 	   InterfaceNumber 1 / AlternateSetting 1     streaming */
224 	ret = usb_set_interface(d->udev, 1, onoff);
225 	if (ret)
226 		dev_err(&d->udev->dev, "%s: usb_set_interface() failed=%d\n",
227 				KBUILD_MODNAME, ret);
228 
229 	return ret;
230 }
231 
232 /* DVB USB Driver stuff */
233 static struct dvb_usb_device_properties ce6230_props = {
234 	.driver_name = KBUILD_MODNAME,
235 	.owner = THIS_MODULE,
236 	.adapter_nr = adapter_nr,
237 	.bInterfaceNumber = 1,
238 
239 	.i2c_algo = &ce6230_i2c_algorithm,
240 	.power_ctrl = ce6230_power_ctrl,
241 	.frontend_attach = ce6230_zl10353_frontend_attach,
242 	.tuner_attach = ce6230_mxl5003s_tuner_attach,
243 
244 	.num_adapters = 1,
245 	.adapter = {
246 		{
247 			.stream = {
248 				.type = USB_BULK,
249 				.count = 6,
250 				.endpoint = 0x82,
251 				.u = {
252 					.bulk = {
253 						.buffersize = (16 * 512),
254 					}
255 				}
256 			},
257 		}
258 	},
259 };
260 
261 static const struct usb_device_id ce6230_id_table[] = {
262 	{ DVB_USB_DEVICE(USB_VID_INTEL, USB_PID_INTEL_CE9500,
263 		&ce6230_props, "Intel CE9500 reference design", NULL) },
264 	{ DVB_USB_DEVICE(USB_VID_AVERMEDIA, USB_PID_AVERMEDIA_A310,
265 		&ce6230_props, "AVerMedia A310 USB 2.0 DVB-T tuner", NULL) },
266 	{ }
267 };
268 MODULE_DEVICE_TABLE(usb, ce6230_id_table);
269 
270 static struct usb_driver ce6230_usb_driver = {
271 	.name = KBUILD_MODNAME,
272 	.id_table = ce6230_id_table,
273 	.probe = dvb_usbv2_probe,
274 	.disconnect = dvb_usbv2_disconnect,
275 	.suspend = dvb_usbv2_suspend,
276 	.resume = dvb_usbv2_resume,
277 	.reset_resume = dvb_usbv2_reset_resume,
278 	.no_dynamic_id = 1,
279 	.soft_unbind = 1,
280 };
281 
282 module_usb_driver(ce6230_usb_driver);
283 
284 MODULE_AUTHOR("Antti Palosaari <crope@iki.fi>");
285 MODULE_DESCRIPTION("Intel CE6230 driver");
286 MODULE_LICENSE("GPL");
287