1 /* Linux driver for devices based on the DiBcom DiB0700 USB bridge
3 * This program is free software; you can redistribute it and/or modify it
4 * under the terms of the GNU General Public License as published by the Free
5 * Software Foundation, version 2.
7 * Copyright (C) 2005-6 DiBcom, SA
12 int dvb_usb_dib0700_debug;
13 module_param_named(debug,dvb_usb_dib0700_debug, int, 0644);
14 MODULE_PARM_DESC(debug, "set debugging level (1=info,2=fw,4=fwdata,8=data (or-able))." DVB_USB_DEBUG_STATUS);
16 /* expecting rx buffer: request data[0] data[1] ... data[2] */
17 static int dib0700_ctrl_wr(struct dvb_usb_device *d, u8 *tx, u8 txlen)
22 debug_dump(tx,txlen,deb_data);
24 status = usb_control_msg(d->udev, usb_sndctrlpipe(d->udev,0),
25 tx[0], USB_TYPE_VENDOR | USB_DIR_OUT, 0, 0, tx, txlen,
26 USB_CTRL_GET_TIMEOUT);
29 deb_data("ep 0 write error (status = %d, len: %d)\n",status,txlen);
31 return status < 0 ? status : 0;
34 /* expecting tx buffer: request data[0] ... data[n] (n <= 4) */
35 static int dib0700_ctrl_rd(struct dvb_usb_device *d, u8 *tx, u8 txlen, u8 *rx, u8 rxlen)
41 err("tx buffer length is smaller than 2. Makes no sense.");
45 err("tx buffer length is larger than 4. Not supported.");
50 debug_dump(tx,txlen,deb_data);
52 value = ((txlen - 2) << 8) | tx[1];
55 index |= (tx[2] << 8);
59 /* think about swapping here */
60 value = le16_to_cpu(value);
61 index = le16_to_cpu(index);
63 status = usb_control_msg(d->udev, usb_rcvctrlpipe(d->udev,0), tx[0],
64 USB_TYPE_VENDOR | USB_DIR_IN, value, index, rx, rxlen,
65 USB_CTRL_GET_TIMEOUT);
68 deb_info("ep 0 read error (status = %d)\n",status);
71 debug_dump(rx,rxlen,deb_data);
73 return status; /* length in case of success */
76 int dib0700_set_gpio(struct dvb_usb_device *d, enum dib07x0_gpios gpio, u8 gpio_dir, u8 gpio_val)
78 u8 buf[3] = { REQUEST_SET_GPIO, gpio, ((gpio_dir & 0x01) << 7) | ((gpio_val & 0x01) << 6) };
79 return dib0700_ctrl_wr(d,buf,3);
83 * I2C master xfer function
85 static int dib0700_i2c_xfer(struct i2c_adapter *adap,struct i2c_msg *msg,int num)
87 struct dvb_usb_device *d = i2c_get_adapdata(adap);
91 if (mutex_lock_interruptible(&d->i2c_mutex) < 0)
94 for (i = 0; i < num; i++) {
95 /* fill in the address */
96 buf[1] = (msg[i].addr << 1);
98 memcpy(&buf[2], msg[i].buf, msg[i].len);
100 /* write/read request */
101 if (i+1 < num && (msg[i+1].flags & I2C_M_RD)) {
102 buf[0] = REQUEST_I2C_READ;
105 /* special thing in the current firmware: when length is zero the read-failed */
106 if ((len = dib0700_ctrl_rd(d, buf, msg[i].len + 2, msg[i+1].buf, msg[i+1].len)) <= 0) {
107 deb_info("I2C read failed on address %x\n", msg[i].addr);
115 buf[0] = REQUEST_I2C_WRITE;
116 if (dib0700_ctrl_wr(d, buf, msg[i].len + 2) < 0)
121 mutex_unlock(&d->i2c_mutex);
125 static u32 dib0700_i2c_func(struct i2c_adapter *adapter)
130 struct i2c_algorithm dib0700_i2c_algo = {
131 .master_xfer = dib0700_i2c_xfer,
132 .functionality = dib0700_i2c_func,
135 int dib0700_identify_state(struct usb_device *udev, struct dvb_usb_device_properties *props,
136 struct dvb_usb_device_description **desc, int *cold)
138 u8 buf[3] = { REQUEST_SET_GPIO, 4, (GPIO_IN << 7) | (0 << 6) }; // GPIO4 is save - used for I2C
139 *cold = usb_control_msg(udev, usb_sndctrlpipe(udev,0),
140 buf[0], USB_TYPE_VENDOR | USB_DIR_OUT, 0, 0, buf, 3, USB_CTRL_GET_TIMEOUT) != 3;
142 deb_info("cold: %d\n", *cold);
146 static int dib0700_jumpram(struct usb_device *udev, u32 address)
149 u8 buf[8] = { REQUEST_JUMPRAM, 0, 0, 0,
150 (address >> 24) & 0xff,
151 (address >> 16) & 0xff,
152 (address >> 8) & 0xff,
155 if ((ret = usb_bulk_msg(udev, usb_sndbulkpipe(udev, 0x01),buf,8,&actlen,1000)) < 0) {
156 deb_fw("jumpram to 0x%x failed\n",address);
160 deb_fw("jumpram to 0x%x failed\n",address);
166 int dib0700_download_firmware(struct usb_device *udev, const struct firmware *fw)
169 int pos = 0, ret, act_len;
173 while ((ret = dvb_usb_get_hexline(fw, &hx, &pos)) > 0) {
174 deb_fwdata("writing to address 0x%08x (buffer: 0x%02x %02x)\n",hx.addr, hx.len, hx.chk);
177 buf[1] = (hx.addr >> 8) & 0xff;
178 buf[2] = hx.addr & 0xff;
180 memcpy(&buf[4],hx.data,hx.len);
181 buf[4+hx.len] = hx.chk;
183 ret = usb_bulk_msg(udev,
184 usb_sndbulkpipe(udev, 0x01),
191 err("firmware download failed at %d with %d",pos,ret);
197 /* start the firmware */
198 if ((ret = dib0700_jumpram(udev, 0x70000000)) == 0) {
199 info("firmware started successfully.");
208 int dib0700_streaming_ctrl(struct dvb_usb_adapter *adap, int onoff)
210 struct dib0700_state *st = adap->dev->priv;
213 b[0] = REQUEST_ENABLE_VIDEO;
215 b[2] = (0x01 << 4); /* Master mode */
218 deb_info("modifying (%d) streaming state for %d\n", onoff, adap->id);
221 st->channel_state |= 1 << adap->id;
223 st->channel_state &= ~(1 << adap->id);
225 b[2] |= st->channel_state;
227 if (st->channel_state) /* if at least one channel is active */
228 b[1] = (0x01 << 4) | 0x00;
230 deb_info("data for streaming: %x %x\n",b[1],b[2]);
232 return dib0700_ctrl_wr(adap->dev, b, 4);
235 static int dib0700_probe(struct usb_interface *intf,
236 const struct usb_device_id *id)
240 for (i = 0; i < dib0700_device_count; i++)
241 if (dvb_usb_device_init(intf, &dib0700_devices[i], THIS_MODULE, NULL) == 0)
247 static struct usb_driver dib0700_driver = {
248 .name = "dvb_usb_dib0700",
249 .probe = dib0700_probe,
250 .disconnect = dvb_usb_device_exit,
251 .id_table = dib0700_usb_id_table,
255 static int __init dib0700_module_init(void)
258 info("loaded with support for %d different device-types", dib0700_device_count);
259 if ((result = usb_register(&dib0700_driver))) {
260 err("usb_register failed. Error number %d",result);
267 static void __exit dib0700_module_exit(void)
269 /* deregister this driver from the USB subsystem */
270 usb_deregister(&dib0700_driver);
273 module_init (dib0700_module_init);
274 module_exit (dib0700_module_exit);
276 MODULE_AUTHOR("Patrick Boettcher <pboettcher@dibcom.fr>");
277 MODULE_DESCRIPTION("Driver for devices based on DiBcom DiB0700 - USB bridge");
278 MODULE_VERSION("1.0");
279 MODULE_LICENSE("GPL");