1 /*
2  * E3C EC168 DVB USB driver
3  *
4  * Copyright (C) 2009 Antti Palosaari <crope@iki.fi>
5  *
6  *    This program is free software; you can redistribute it and/or modify
7  *    it under the terms of the GNU General Public License as published by
8  *    the Free Software Foundation; either version 2 of the License, or
9  *    (at your option) any later version.
10  *
11  *    This program is distributed in the hope that it will be useful,
12  *    but WITHOUT ANY WARRANTY; without even the implied warranty of
13  *    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
14  *    GNU General Public License for more details.
15  *
16  *    You should have received a copy of the GNU General Public License
17  *    along with this program; if not, write to the Free Software
18  *    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
19  *
20  */
21 
22 #include "ec168.h"
23 #include "ec100.h"
24 #include "mxl5005s.h"
25 
26 DVB_DEFINE_MOD_OPT_ADAPTER_NR(adapter_nr);
27 
28 static int ec168_ctrl_msg(struct dvb_usb_device *d, struct ec168_req *req)
29 {
30 	int ret;
31 	unsigned int pipe;
32 	u8 request, requesttype;
33 	u8 *buf;
34 
35 	switch (req->cmd) {
36 	case DOWNLOAD_FIRMWARE:
37 	case GPIO:
38 	case WRITE_I2C:
39 	case STREAMING_CTRL:
40 		requesttype = (USB_TYPE_VENDOR | USB_DIR_OUT);
41 		request = req->cmd;
42 		break;
43 	case READ_I2C:
44 		requesttype = (USB_TYPE_VENDOR | USB_DIR_IN);
45 		request = req->cmd;
46 		break;
47 	case GET_CONFIG:
48 		requesttype = (USB_TYPE_VENDOR | USB_DIR_IN);
49 		request = CONFIG;
50 		break;
51 	case SET_CONFIG:
52 		requesttype = (USB_TYPE_VENDOR | USB_DIR_OUT);
53 		request = CONFIG;
54 		break;
55 	case WRITE_DEMOD:
56 		requesttype = (USB_TYPE_VENDOR | USB_DIR_OUT);
57 		request = DEMOD_RW;
58 		break;
59 	case READ_DEMOD:
60 		requesttype = (USB_TYPE_VENDOR | USB_DIR_IN);
61 		request = DEMOD_RW;
62 		break;
63 	default:
64 		dev_err(&d->udev->dev, "%s: unknown command=%02x\n",
65 				KBUILD_MODNAME, req->cmd);
66 		ret = -EINVAL;
67 		goto error;
68 	}
69 
70 	buf = kmalloc(req->size, GFP_KERNEL);
71 	if (!buf) {
72 		ret = -ENOMEM;
73 		goto error;
74 	}
75 
76 	if (requesttype == (USB_TYPE_VENDOR | USB_DIR_OUT)) {
77 		/* write */
78 		memcpy(buf, req->data, req->size);
79 		pipe = usb_sndctrlpipe(d->udev, 0);
80 	} else {
81 		/* read */
82 		pipe = usb_rcvctrlpipe(d->udev, 0);
83 	}
84 
85 	msleep(1); /* avoid I2C errors */
86 
87 	ret = usb_control_msg(d->udev, pipe, request, requesttype, req->value,
88 		req->index, buf, req->size, EC168_USB_TIMEOUT);
89 
90 	dvb_usb_dbg_usb_control_msg(d->udev, request, requesttype, req->value,
91 			req->index, buf, req->size);
92 
93 	if (ret < 0)
94 		goto err_dealloc;
95 	else
96 		ret = 0;
97 
98 	/* read request, copy returned data to return buf */
99 	if (!ret && requesttype == (USB_TYPE_VENDOR | USB_DIR_IN))
100 		memcpy(req->data, buf, req->size);
101 
102 	kfree(buf);
103 	return ret;
104 
105 err_dealloc:
106 	kfree(buf);
107 error:
108 	dev_dbg(&d->udev->dev, "%s: failed=%d\n", __func__, ret);
109 	return ret;
110 }
111 
112 /* I2C */
113 static struct ec100_config ec168_ec100_config;
114 
115 static int ec168_i2c_xfer(struct i2c_adapter *adap, struct i2c_msg msg[],
116 	int num)
117 {
118 	struct dvb_usb_device *d = i2c_get_adapdata(adap);
119 	struct ec168_req req;
120 	int i = 0;
121 	int ret;
122 
123 	if (num > 2)
124 		return -EINVAL;
125 
126 	if (mutex_lock_interruptible(&d->i2c_mutex) < 0)
127 		return -EAGAIN;
128 
129 	while (i < num) {
130 		if (num > i + 1 && (msg[i+1].flags & I2C_M_RD)) {
131 			if (msg[i].addr == ec168_ec100_config.demod_address) {
132 				req.cmd = READ_DEMOD;
133 				req.value = 0;
134 				req.index = 0xff00 + msg[i].buf[0]; /* reg */
135 				req.size = msg[i+1].len; /* bytes to read */
136 				req.data = &msg[i+1].buf[0];
137 				ret = ec168_ctrl_msg(d, &req);
138 				i += 2;
139 			} else {
140 				dev_err(&d->udev->dev, "%s: I2C read not " \
141 						"implemented\n",
142 						KBUILD_MODNAME);
143 				ret = -EOPNOTSUPP;
144 				i += 2;
145 			}
146 		} else {
147 			if (msg[i].addr == ec168_ec100_config.demod_address) {
148 				req.cmd = WRITE_DEMOD;
149 				req.value = msg[i].buf[1]; /* val */
150 				req.index = 0xff00 + msg[i].buf[0]; /* reg */
151 				req.size = 0;
152 				req.data = NULL;
153 				ret = ec168_ctrl_msg(d, &req);
154 				i += 1;
155 			} else {
156 				req.cmd = WRITE_I2C;
157 				req.value = msg[i].buf[0]; /* val */
158 				req.index = 0x0100 + msg[i].addr; /* I2C addr */
159 				req.size = msg[i].len-1;
160 				req.data = &msg[i].buf[1];
161 				ret = ec168_ctrl_msg(d, &req);
162 				i += 1;
163 			}
164 		}
165 		if (ret)
166 			goto error;
167 
168 	}
169 	ret = i;
170 
171 error:
172 	mutex_unlock(&d->i2c_mutex);
173 	return ret;
174 }
175 
176 static u32 ec168_i2c_func(struct i2c_adapter *adapter)
177 {
178 	return I2C_FUNC_I2C;
179 }
180 
181 static struct i2c_algorithm ec168_i2c_algo = {
182 	.master_xfer   = ec168_i2c_xfer,
183 	.functionality = ec168_i2c_func,
184 };
185 
186 /* Callbacks for DVB USB */
187 static int ec168_identify_state(struct dvb_usb_device *d, const char **name)
188 {
189 	int ret;
190 	u8 reply;
191 	struct ec168_req req = {GET_CONFIG, 0, 1, sizeof(reply), &reply};
192 	dev_dbg(&d->udev->dev, "%s:\n", __func__);
193 
194 	ret = ec168_ctrl_msg(d, &req);
195 	if (ret)
196 		goto error;
197 
198 	dev_dbg(&d->udev->dev, "%s: reply=%02x\n", __func__, reply);
199 
200 	if (reply == 0x01)
201 		ret = WARM;
202 	else
203 		ret = COLD;
204 
205 	return ret;
206 error:
207 	dev_dbg(&d->udev->dev, "%s: failed=%d\n", __func__, ret);
208 	return ret;
209 }
210 
211 static int ec168_download_firmware(struct dvb_usb_device *d,
212 		const struct firmware *fw)
213 {
214 	int ret, len, remaining;
215 	struct ec168_req req = {DOWNLOAD_FIRMWARE, 0, 0, 0, NULL};
216 	dev_dbg(&d->udev->dev, "%s:\n", __func__);
217 
218 	#define LEN_MAX 2048 /* max packet size */
219 	for (remaining = fw->size; remaining > 0; remaining -= LEN_MAX) {
220 		len = remaining;
221 		if (len > LEN_MAX)
222 			len = LEN_MAX;
223 
224 		req.size = len;
225 		req.data = (u8 *) &fw->data[fw->size - remaining];
226 		req.index = fw->size - remaining;
227 
228 		ret = ec168_ctrl_msg(d, &req);
229 		if (ret) {
230 			dev_err(&d->udev->dev,
231 					"%s: firmware download failed=%d\n",
232 					KBUILD_MODNAME, ret);
233 			goto error;
234 		}
235 	}
236 
237 	req.size = 0;
238 
239 	/* set "warm"? */
240 	req.cmd = SET_CONFIG;
241 	req.value = 0;
242 	req.index = 0x0001;
243 	ret = ec168_ctrl_msg(d, &req);
244 	if (ret)
245 		goto error;
246 
247 	/* really needed - no idea what does */
248 	req.cmd = GPIO;
249 	req.value = 0;
250 	req.index = 0x0206;
251 	ret = ec168_ctrl_msg(d, &req);
252 	if (ret)
253 		goto error;
254 
255 	/* activate tuner I2C? */
256 	req.cmd = WRITE_I2C;
257 	req.value = 0;
258 	req.index = 0x00c6;
259 	ret = ec168_ctrl_msg(d, &req);
260 	if (ret)
261 		goto error;
262 
263 	return ret;
264 error:
265 	dev_dbg(&d->udev->dev, "%s: failed=%d\n", __func__, ret);
266 	return ret;
267 }
268 
269 static struct ec100_config ec168_ec100_config = {
270 	.demod_address = 0xff, /* not real address, demod is integrated */
271 };
272 
273 static int ec168_ec100_frontend_attach(struct dvb_usb_adapter *adap)
274 {
275 	struct dvb_usb_device *d = adap_to_d(adap);
276 	dev_dbg(&d->udev->dev, "%s:\n", __func__);
277 
278 	adap->fe[0] = dvb_attach(ec100_attach, &ec168_ec100_config,
279 			&d->i2c_adap);
280 	if (adap->fe[0] == NULL)
281 		return -ENODEV;
282 
283 	return 0;
284 }
285 
286 static struct mxl5005s_config ec168_mxl5003s_config = {
287 	.i2c_address     = 0xc6,
288 	.if_freq         = IF_FREQ_4570000HZ,
289 	.xtal_freq       = CRYSTAL_FREQ_16000000HZ,
290 	.agc_mode        = MXL_SINGLE_AGC,
291 	.tracking_filter = MXL_TF_OFF,
292 	.rssi_enable     = MXL_RSSI_ENABLE,
293 	.cap_select      = MXL_CAP_SEL_ENABLE,
294 	.div_out         = MXL_DIV_OUT_4,
295 	.clock_out       = MXL_CLOCK_OUT_DISABLE,
296 	.output_load     = MXL5005S_IF_OUTPUT_LOAD_200_OHM,
297 	.top		 = MXL5005S_TOP_25P2,
298 	.mod_mode        = MXL_DIGITAL_MODE,
299 	.if_mode         = MXL_ZERO_IF,
300 	.AgcMasterByte   = 0x00,
301 };
302 
303 static int ec168_mxl5003s_tuner_attach(struct dvb_usb_adapter *adap)
304 {
305 	struct dvb_usb_device *d = adap_to_d(adap);
306 	dev_dbg(&d->udev->dev, "%s:\n", __func__);
307 
308 	return dvb_attach(mxl5005s_attach, adap->fe[0], &d->i2c_adap,
309 			&ec168_mxl5003s_config) == NULL ? -ENODEV : 0;
310 }
311 
312 static int ec168_streaming_ctrl(struct dvb_frontend *fe, int onoff)
313 {
314 	struct dvb_usb_device *d = fe_to_d(fe);
315 	struct ec168_req req = {STREAMING_CTRL, 0x7f01, 0x0202, 0, NULL};
316 	dev_dbg(&d->udev->dev, "%s: onoff=%d\n", __func__, onoff);
317 
318 	if (onoff)
319 		req.index = 0x0102;
320 	return ec168_ctrl_msg(d, &req);
321 }
322 
323 /* DVB USB Driver stuff */
324 /* bInterfaceNumber 0 is HID
325  * bInterfaceNumber 1 is DVB-T */
326 static struct dvb_usb_device_properties ec168_props = {
327 	.driver_name = KBUILD_MODNAME,
328 	.owner = THIS_MODULE,
329 	.adapter_nr = adapter_nr,
330 	.bInterfaceNumber = 1,
331 
332 	.identify_state = ec168_identify_state,
333 	.firmware = EC168_FIRMWARE,
334 	.download_firmware = ec168_download_firmware,
335 
336 	.i2c_algo = &ec168_i2c_algo,
337 	.frontend_attach = ec168_ec100_frontend_attach,
338 	.tuner_attach = ec168_mxl5003s_tuner_attach,
339 	.streaming_ctrl = ec168_streaming_ctrl,
340 
341 	.num_adapters = 1,
342 	.adapter = {
343 		{
344 			.stream = DVB_USB_STREAM_BULK(0x82, 6, 32 * 512),
345 		}
346 	},
347 };
348 
349 static const struct dvb_usb_driver_info ec168_driver_info = {
350 	.name = "E3C EC168 reference design",
351 	.props = &ec168_props,
352 };
353 
354 static const struct usb_device_id ec168_id[] = {
355 	{ USB_DEVICE(USB_VID_E3C, USB_PID_E3C_EC168),
356 		.driver_info = (kernel_ulong_t) &ec168_driver_info },
357 	{ USB_DEVICE(USB_VID_E3C, USB_PID_E3C_EC168_2),
358 		.driver_info = (kernel_ulong_t) &ec168_driver_info },
359 	{ USB_DEVICE(USB_VID_E3C, USB_PID_E3C_EC168_3),
360 		.driver_info = (kernel_ulong_t) &ec168_driver_info },
361 	{ USB_DEVICE(USB_VID_E3C, USB_PID_E3C_EC168_4),
362 		.driver_info = (kernel_ulong_t) &ec168_driver_info },
363 	{ USB_DEVICE(USB_VID_E3C, USB_PID_E3C_EC168_5),
364 		.driver_info = (kernel_ulong_t) &ec168_driver_info },
365 	{}
366 };
367 MODULE_DEVICE_TABLE(usb, ec168_id);
368 
369 static struct usb_driver ec168_driver = {
370 	.name = KBUILD_MODNAME,
371 	.id_table = ec168_id,
372 	.probe = dvb_usbv2_probe,
373 	.disconnect = dvb_usbv2_disconnect,
374 	.suspend = dvb_usbv2_suspend,
375 	.resume = dvb_usbv2_resume,
376 	.no_dynamic_id = 1,
377 	.soft_unbind = 1,
378 };
379 
380 module_usb_driver(ec168_driver);
381 
382 MODULE_AUTHOR("Antti Palosaari <crope@iki.fi>");
383 MODULE_DESCRIPTION("E3C EC168 driver");
384 MODULE_LICENSE("GPL");
385 MODULE_FIRMWARE(EC168_FIRMWARE);
386