1/* DVB USB compliant Linux driver for the
2 *  - GENPIX 8pks/qpsk USB2.0 DVB-S module
3 *
4 * Copyright (C) 2006 Alan Nisota (alannisota@gmail.com)
5 *
6 * Thanks to GENPIX for the sample code used to implement this module.
7 *
8 * This module is based off the vp7045 and vp702x modules
9 *
10 *	This program is free software; you can redistribute it and/or modify it
11 *	under the terms of the GNU General Public License as published by the Free
12 *	Software Foundation, version 2.
13 *
14 * see Documentation/dvb/README.dvb-usb for more information
15 */
16#include "gp8psk.h"
17
18/* debug */
19static char bcm4500_firmware[] = "dvb-usb-gp8psk-02.fw";
20int dvb_usb_gp8psk_debug;
21module_param_named(debug,dvb_usb_gp8psk_debug, int, 0644);
22MODULE_PARM_DESC(debug, "set debugging level (1=info,xfer=2,rc=4 (or-able))." DVB_USB_DEBUG_STATUS);
23
24int gp8psk_usb_in_op(struct dvb_usb_device *d, u8 req, u16 value, u16 index, u8 *b, int blen)
25{
26	int ret = 0,try = 0;
27
28	if ((ret = mutex_lock_interruptible(&d->usb_mutex)))
29		return ret;
30
31	while (ret >= 0 && ret != blen && try < 3) {
32		ret = usb_control_msg(d->udev,
33			usb_rcvctrlpipe(d->udev,0),
34			req,
35			USB_TYPE_VENDOR | USB_DIR_IN,
36			value,index,b,blen,
37			2000);
38		deb_info("reading number %d (ret: %d)\n",try,ret);
39		try++;
40	}
41
42	if (ret < 0 || ret != blen) {
43		warn("usb in operation failed.");
44		ret = -EIO;
45	} else
46		ret = 0;
47
48	deb_xfer("in: req. %x, val: %x, ind: %x, buffer: ",req,value,index);
49	debug_dump(b,blen,deb_xfer);
50
51	mutex_unlock(&d->usb_mutex);
52
53	return ret;
54}
55
56int gp8psk_usb_out_op(struct dvb_usb_device *d, u8 req, u16 value,
57			     u16 index, u8 *b, int blen)
58{
59	int ret;
60
61	deb_xfer("out: req. %x, val: %x, ind: %x, buffer: ",req,value,index);
62	debug_dump(b,blen,deb_xfer);
63
64	if ((ret = mutex_lock_interruptible(&d->usb_mutex)))
65		return ret;
66
67	if (usb_control_msg(d->udev,
68			usb_sndctrlpipe(d->udev,0),
69			req,
70			USB_TYPE_VENDOR | USB_DIR_OUT,
71			value,index,b,blen,
72			2000) != blen) {
73		warn("usb out operation failed.");
74		ret = -EIO;
75	} else
76		ret = 0;
77	mutex_unlock(&d->usb_mutex);
78
79	return ret;
80}
81
82static int gp8psk_load_bcm4500fw(struct dvb_usb_device *d)
83{
84	int ret;
85	const struct firmware *fw = NULL;
86	u8 *ptr, *buf;
87	if ((ret = request_firmware(&fw, bcm4500_firmware,
88					&d->udev->dev)) != 0) {
89		err("did not find the bcm4500 firmware file. (%s) "
90			"Please see linux/Documentation/dvb/ for more details on firmware-problems. (%d)",
91			bcm4500_firmware,ret);
92		return ret;
93	}
94
95	ret = -EINVAL;
96
97	if (gp8psk_usb_out_op(d, LOAD_BCM4500,1,0,NULL, 0))
98		goto out_rel_fw;
99
100	info("downloaidng bcm4500 firmware from file '%s'",bcm4500_firmware);
101
102	ptr = fw->data;
103	buf = kmalloc(512, GFP_KERNEL | GFP_DMA);
104
105	while (ptr[0] != 0xff) {
106		u16 buflen = ptr[0] + 4;
107		if (ptr + buflen >= fw->data + fw->size) {
108			err("failed to load bcm4500 firmware.");
109			goto out_free;
110		}
111		memcpy(buf, ptr, buflen);
112		if (dvb_usb_generic_write(d, buf, buflen)) {
113			err("failed to load bcm4500 firmware.");
114			goto out_free;
115		}
116		ptr += buflen;
117	}
118
119	ret = 0;
120
121out_free:
122	kfree(buf);
123out_rel_fw:
124	release_firmware(fw);
125
126	return ret;
127}
128
129static int gp8psk_power_ctrl(struct dvb_usb_device *d, int onoff)
130{
131	u8 status, buf;
132	if (onoff) {
133		gp8psk_usb_in_op(d, GET_8PSK_CONFIG,0,0,&status,1);
134		if (! (status & 0x01))  /* started */
135			if (gp8psk_usb_in_op(d, BOOT_8PSK, 1, 0, &buf, 1))
136				return -EINVAL;
137
138		if (! (status & 0x02)) /* BCM4500 firmware loaded */
139			if(gp8psk_load_bcm4500fw(d))
140				return EINVAL;
141
142		if (! (status & 0x04)) /* LNB Power */
143			if (gp8psk_usb_in_op(d, START_INTERSIL, 1, 0,
144					&buf, 1))
145				return EINVAL;
146
147		/* Set DVB mode */
148		if(gp8psk_usb_out_op(d, SET_DVB_MODE, 1, 0, NULL, 0))
149			return -EINVAL;
150		gp8psk_usb_in_op(d, GET_8PSK_CONFIG,0,0,&status,1);
151	} else {
152		/* Turn off LNB power */
153		if (gp8psk_usb_in_op(d, START_INTERSIL, 0, 0, &buf, 1))
154			return EINVAL;
155		/* Turn off 8psk power */
156		if (gp8psk_usb_in_op(d, BOOT_8PSK, 0, 0, &buf, 1))
157			return -EINVAL;
158
159	}
160	return 0;
161}
162
163
164static int gp8psk_streaming_ctrl(struct dvb_usb_adapter *adap, int onoff)
165{
166	return gp8psk_usb_out_op(adap->dev, ARM_TRANSFER, onoff, 0 , NULL, 0);
167}
168
169static int gp8psk_frontend_attach(struct dvb_usb_adapter *adap)
170{
171	adap->fe = gp8psk_fe_attach(adap->dev);
172	return 0;
173}
174
175static struct dvb_usb_device_properties gp8psk_properties;
176
177static int gp8psk_usb_probe(struct usb_interface *intf,
178		const struct usb_device_id *id)
179{
180	return dvb_usb_device_init(intf,&gp8psk_properties,THIS_MODULE,NULL);
181}
182
183static struct usb_device_id gp8psk_usb_table [] = {
184	    { USB_DEVICE(USB_VID_GENPIX, USB_PID_GENPIX_8PSK_COLD) },
185	    { USB_DEVICE(USB_VID_GENPIX, USB_PID_GENPIX_8PSK_WARM) },
186	    { 0 },
187};
188MODULE_DEVICE_TABLE(usb, gp8psk_usb_table);
189
190static struct dvb_usb_device_properties gp8psk_properties = {
191	.usb_ctrl = CYPRESS_FX2,
192	.firmware = "dvb-usb-gp8psk-01.fw",
193
194	.num_adapters = 1,
195	.adapter = {
196		{
197			.streaming_ctrl   = gp8psk_streaming_ctrl,
198			.frontend_attach  = gp8psk_frontend_attach,
199			/* parameter for the MPEG2-data transfer */
200			.stream = {
201				.type = USB_BULK,
202				.count = 7,
203				.endpoint = 0x82,
204				.u = {
205					.bulk = {
206						.buffersize = 8192,
207					}
208				}
209			},
210		}
211	},
212	.power_ctrl       = gp8psk_power_ctrl,
213
214	.generic_bulk_ctrl_endpoint = 0x01,
215
216	.num_device_descs = 1,
217	.devices = {
218		{ .name = "Genpix 8PSK-USB DVB-S USB2.0 receiver",
219		  .cold_ids = { &gp8psk_usb_table[0], NULL },
220		  .warm_ids = { &gp8psk_usb_table[1], NULL },
221		},
222		{ NULL },
223	}
224};
225
226/* usb specific object needed to register this driver with the usb subsystem */
227static struct usb_driver gp8psk_usb_driver = {
228	.name		= "dvb_usb_gp8psk",
229	.probe		= gp8psk_usb_probe,
230	.disconnect = dvb_usb_device_exit,
231	.id_table	= gp8psk_usb_table,
232};
233
234/* module stuff */
235static int __init gp8psk_usb_module_init(void)
236{
237	int result;
238	if ((result = usb_register(&gp8psk_usb_driver))) {
239		err("usb_register failed. (%d)",result);
240		return result;
241	}
242
243	return 0;
244}
245
246static void __exit gp8psk_usb_module_exit(void)
247{
248	/* deregister this driver from the USB subsystem */
249	usb_deregister(&gp8psk_usb_driver);
250}
251
252module_init(gp8psk_usb_module_init);
253module_exit(gp8psk_usb_module_exit);
254
255MODULE_AUTHOR("Alan Nisota <alannisota@gamil.com>");
256MODULE_DESCRIPTION("Driver for Genpix 8psk-USB DVB-S USB2.0");
257MODULE_VERSION("1.0");
258MODULE_LICENSE("GPL");
259