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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 | /* DVB USB compliant linux driver for Conexant USB reference design.
*
* The Conexant reference design I saw on their website was only for analogue
* capturing (using the cx25842). The box I took to write this driver (reverse
* engineered) is the one labeled Medion MD95700. In addition to the cx25842
* for analogue capturing it also has a cx22702 DVB-T demodulator on the main
* board. Besides it has a atiremote (X10) and a USB2.0 hub onboard.
*
* Maybe it is a little bit premature to call this driver cxusb, but I assume
* the USB protocol is identical or at least inherited from the reference
* design, so it can be reused for the "analogue-only" device (if it will
* appear at all).
*
* TODO: check if the cx25840-driver (from ivtv) can be used for the analogue
* part
*
* Copyright (C) 2005 Patrick Boettcher (patrick.boettcher@desy.de)
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the Free
* Software Foundation, version 2.
*
* see Documentation/dvb/README.dvb-usb for more information
*/
#include "cxusb.h"
#include "cx22702.h"
/* debug */
int dvb_usb_cxusb_debug;
module_param_named(debug,dvb_usb_cxusb_debug, int, 0644);
MODULE_PARM_DESC(debug, "set debugging level (1=rc (or-able))." DVB_USB_DEBUG_STATUS);
static int cxusb_ctrl_msg(struct dvb_usb_device *d,
u8 cmd, u8 *wbuf, int wlen, u8 *rbuf, int rlen)
{
int wo = (rbuf == NULL || rlen == 0); /* write-only */
u8 sndbuf[1+wlen];
memset(sndbuf,0,1+wlen);
sndbuf[0] = cmd;
memcpy(&sndbuf[1],wbuf,wlen);
if (wo)
dvb_usb_generic_write(d,sndbuf,1+wlen);
else
dvb_usb_generic_rw(d,sndbuf,1+wlen,rbuf,rlen,0);
return 0;
}
/* GPIO */
static void cxusb_gpio_tuner(struct dvb_usb_device *d, int onoff)
{
struct cxusb_state *st = d->priv;
u8 o[2],i;
if (st->gpio_write_state[GPIO_TUNER] == onoff)
return;
o[0] = GPIO_TUNER;
o[1] = onoff;
cxusb_ctrl_msg(d,CMD_GPIO_WRITE,o,2,&i,1);
if (i != 0x01)
deb_info("gpio_write failed.\n");
st->gpio_write_state[GPIO_TUNER] = onoff;
}
/* I2C */
static int cxusb_i2c_xfer(struct i2c_adapter *adap,struct i2c_msg msg[],int num)
{
struct dvb_usb_device *d = i2c_get_adapdata(adap);
int i;
if (down_interruptible(&d->i2c_sem) < 0)
return -EAGAIN;
if (num > 2)
warn("more than 2 i2c messages at a time is not handled yet. TODO.");
for (i = 0; i < num; i++) {
switch (msg[i].addr) {
case 0x63:
cxusb_gpio_tuner(d,0);
break;
default:
cxusb_gpio_tuner(d,1);
break;
}
/* read request */
if (i+1 < num && (msg[i+1].flags & I2C_M_RD)) {
u8 obuf[3+msg[i].len], ibuf[1+msg[i+1].len];
obuf[0] = msg[i].len;
obuf[1] = msg[i+1].len;
obuf[2] = msg[i].addr;
memcpy(&obuf[3],msg[i].buf,msg[i].len);
if (cxusb_ctrl_msg(d, CMD_I2C_READ,
obuf, 3+msg[i].len,
ibuf, 1+msg[i+1].len) < 0)
break;
if (ibuf[0] != 0x08)
deb_info("i2c read could have been failed\n");
memcpy(msg[i+1].buf,&ibuf[1],msg[i+1].len);
i++;
} else { /* write */
u8 obuf[2+msg[i].len], ibuf;
obuf[0] = msg[i].addr;
obuf[1] = msg[i].len;
memcpy(&obuf[2],msg[i].buf,msg[i].len);
if (cxusb_ctrl_msg(d,CMD_I2C_WRITE, obuf, 2+msg[i].len, &ibuf,1) < 0)
break;
if (ibuf != 0x08)
deb_info("i2c write could have been failed\n");
}
}
up(&d->i2c_sem);
return i;
}
static u32 cxusb_i2c_func(struct i2c_adapter *adapter)
{
return I2C_FUNC_I2C;
}
static struct i2c_algorithm cxusb_i2c_algo = {
.master_xfer = cxusb_i2c_xfer,
.functionality = cxusb_i2c_func,
};
static int cxusb_power_ctrl(struct dvb_usb_device *d, int onoff)
{
u8 b = 0;
if (onoff)
return cxusb_ctrl_msg(d, CMD_POWER_ON, &b, 1, NULL, 0);
else
return cxusb_ctrl_msg(d, CMD_POWER_OFF, &b, 1, NULL, 0);
}
static int cxusb_streaming_ctrl(struct dvb_usb_device *d, int onoff)
{
u8 buf[2] = { 0x03, 0x00 };
if (onoff)
cxusb_ctrl_msg(d,CMD_STREAMING_ON, buf, 2, NULL, 0);
else
cxusb_ctrl_msg(d,CMD_STREAMING_OFF, NULL, 0, NULL, 0);
return 0;
}
struct cx22702_config cxusb_cx22702_config = {
.demod_address = 0x63,
.output_mode = CX22702_PARALLEL_OUTPUT,
.pll_init = dvb_usb_pll_init_i2c,
.pll_set = dvb_usb_pll_set_i2c,
};
/* Callbacks for DVB USB */
static int cxusb_tuner_attach(struct dvb_usb_device *d)
{
u8 bpll[4] = { 0x0b, 0xdc, 0x9c, 0xa0 };
d->pll_addr = 0x61;
memcpy(d->pll_init,bpll,4);
d->pll_desc = &dvb_pll_fmd1216me;
return 0;
}
static int cxusb_frontend_attach(struct dvb_usb_device *d)
{
u8 b;
if (usb_set_interface(d->udev,0,6) < 0)
err("set interface failed");
cxusb_ctrl_msg(d,CMD_DIGITAL, NULL, 0, &b, 1);
if ((d->fe = cx22702_attach(&cxusb_cx22702_config, &d->i2c_adap)) != NULL)
return 0;
return -EIO;
}
/* DVB USB Driver stuff */
static struct dvb_usb_properties cxusb_properties;
static int cxusb_probe(struct usb_interface *intf,
const struct usb_device_id *id)
{
return dvb_usb_device_init(intf,&cxusb_properties,THIS_MODULE,NULL);
}
static struct usb_device_id cxusb_table [] = {
{ USB_DEVICE(USB_VID_MEDION, USB_PID_MEDION_MD95700) },
{} /* Terminating entry */
};
MODULE_DEVICE_TABLE (usb, cxusb_table);
static struct dvb_usb_properties cxusb_properties = {
.caps = DVB_USB_IS_AN_I2C_ADAPTER,
.usb_ctrl = CYPRESS_FX2,
.size_of_priv = sizeof(struct cxusb_state),
.streaming_ctrl = cxusb_streaming_ctrl,
.power_ctrl = cxusb_power_ctrl,
.frontend_attach = cxusb_frontend_attach,
.tuner_attach = cxusb_tuner_attach,
.i2c_algo = &cxusb_i2c_algo,
.generic_bulk_ctrl_endpoint = 0x01,
/* parameter for the MPEG2-data transfer */
.urb = {
.type = DVB_USB_BULK,
.count = 5,
.endpoint = 0x02,
.u = {
.bulk = {
.buffersize = 8192,
}
}
},
.num_device_descs = 1,
.devices = {
{ "Medion MD95700 (MDUSBTV-HYBRID)",
{ NULL },
{ &cxusb_table[0], NULL },
},
}
};
static struct usb_driver cxusb_driver = {
.owner = THIS_MODULE,
.name = "dvb_usb_cxusb",
.probe = cxusb_probe,
.disconnect = dvb_usb_device_exit,
.id_table = cxusb_table,
};
/* module stuff */
static int __init cxusb_module_init(void)
{
int result;
if ((result = usb_register(&cxusb_driver))) {
err("usb_register failed. Error number %d",result);
return result;
}
return 0;
}
static void __exit cxusb_module_exit(void)
{
/* deregister this driver from the USB subsystem */
usb_deregister(&cxusb_driver);
}
module_init (cxusb_module_init);
module_exit (cxusb_module_exit);
MODULE_AUTHOR("Patrick Boettcher <patrick.boettcher@desy.de>");
MODULE_DESCRIPTION("Driver for Conexant USB2.0 hybrid reference design");
MODULE_VERSION("1.0-alpha");
MODULE_LICENSE("GPL");
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