drivers/media/dvb/dvb-usb/au6610.c

   1 /*
   2  * DVB USB Linux driver for Alcor Micro AU6610 DVB-T USB2.0.
   3  *
   4  * Copyright (C) 2006 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 #include "au6610.h"
  22 #include "zl10353.h"
  23 #include "qt1010.h"
  24
  25 /* debug */
  26 static int dvb_usb_au6610_debug;
  27 module_param_named(debug, dvb_usb_au6610_debug, int, 0644);
  28 MODULE_PARM_DESC(debug, "set debugging level" DVB_USB_DEBUG_STATUS);
  29 DVB_DEFINE_MOD_OPT_ADAPTER_NR(adapter_nr);
  30
  31 static int au6610_usb_msg(struct dvb_usb_device *d, u8 operation, u8 addr,
  32                           u8 *wbuf, u16 wlen, u8 *rbuf, u16 rlen)
  33 {
  34         int ret;
  35         u16 index;
  36         u8 *usb_buf;
  37
  38         /*
  39          * allocate enough for all known requests,
  40          * read returns 5 and write 6 bytes
  41          */
  42         usb_buf = kmalloc(6, GFP_KERNEL);
  43         if (!usb_buf)
  44                 return -ENOMEM;
  45
  46         switch (wlen) {
  47         case 1:
  48                 index = wbuf[0] << 8;
  49                 break;
  50         case 2:
  51                 index = wbuf[0] << 8;
  52                 index += wbuf[1];
  53                 break;
  54         default:
  55                 warn("wlen = %x, aborting.", wlen);
  56                 ret = -EINVAL;
  57                 goto error;
  58         }
  59
  60         ret = usb_control_msg(d->udev, usb_rcvctrlpipe(d->udev, 0), operation,
  61                               USB_TYPE_VENDOR|USB_DIR_IN, addr << 1, index,
  62                               usb_buf, 6, AU6610_USB_TIMEOUT);
  63         if (ret < 0)
  64                 goto error;
  65
  66         switch (operation) {
  67         case AU6610_REQ_I2C_READ:
  68         case AU6610_REQ_USB_READ:
  69                 /* requested value is always 5th byte in buffer */
  70                 rbuf[0] = usb_buf[4];
  71         }
  72 error:
  73         kfree(usb_buf);
  74         return ret;
  75 }
  76
  77 static int au6610_i2c_msg(struct dvb_usb_device *d, u8 addr,
  78                           u8 *wbuf, u16 wlen, u8 *rbuf, u16 rlen)
  79 {
  80         u8 request;
  81         u8 wo = (rbuf == NULL || rlen == 0); /* write-only */
  82
  83         if (wo) {
  84                 request = AU6610_REQ_I2C_WRITE;
  85         } else { /* rw */
  86                 request = AU6610_REQ_I2C_READ;
  87         }
  88
  89         return au6610_usb_msg(d, request, addr, wbuf, wlen, rbuf, rlen);
  90 }
  91
  92
  93 /* I2C */
  94 static int au6610_i2c_xfer(struct i2c_adapter *adap, struct i2c_msg msg[],
  95                            int num)
  96 {
  97         struct dvb_usb_device *d = i2c_get_adapdata(adap);
  98         int i;
  99
 100         if (num > 2)
 101                 return -EINVAL;
 102
 103         if (mutex_lock_interruptible(&d->i2c_mutex) < 0)
 104                 return -EAGAIN;
 105
 106         for (i = 0; i < num; i++) {
 107                 /* write/read request */
 108                 if (i+1 < num && (msg[i+1].flags & I2C_M_RD)) {
 109                         if (au6610_i2c_msg(d, msg[i].addr, msg[i].buf,
 110                                            msg[i].len, msg[i+1].buf,
 111                                            msg[i+1].len) < 0)
 112                                 break;
 113                         i++;
 114                 } else if (au6610_i2c_msg(d, msg[i].addr, msg[i].buf,
 115                                                msg[i].len, NULL, 0) < 0)
 116                                 break;
 117         }
 118
 119         mutex_unlock(&d->i2c_mutex);
 120         return i;
 121 }
 122
 123
 124 static u32 au6610_i2c_func(struct i2c_adapter *adapter)
 125 {
 126         return I2C_FUNC_I2C;
 127 }
 128
 129 static struct i2c_algorithm au6610_i2c_algo = {
 130         .master_xfer   = au6610_i2c_xfer,
 131         .functionality = au6610_i2c_func,
 132 };
 133
 134 /* Callbacks for DVB USB */
 135 static struct zl10353_config au6610_zl10353_config = {
 136         .demod_address = 0x0f,
 137         .no_tuner = 1,
 138         .parallel_ts = 1,
 139 };
 140
 141 static int au6610_zl10353_frontend_attach(struct dvb_usb_adapter *adap)
 142 {
 143         adap->fe = dvb_attach(zl10353_attach, &au6610_zl10353_config,
 144                 &adap->dev->i2c_adap);
 145         if (adap->fe == NULL)
 146                 return -ENODEV;
 147
 148         return 0;
 149 }
 150
 151 static struct qt1010_config au6610_qt1010_config = {
 152         .i2c_address = 0x62
 153 };
 154
 155 static int au6610_qt1010_tuner_attach(struct dvb_usb_adapter *adap)
 156 {
 157         return dvb_attach(qt1010_attach,
 158                           adap->fe, &adap->dev->i2c_adap,
 159                           &au6610_qt1010_config) == NULL ? -ENODEV : 0;
 160 }
 161
 162 /* DVB USB Driver stuff */
 163 static struct dvb_usb_device_properties au6610_properties;
 164
 165 static int au6610_probe(struct usb_interface *intf,
 166                         const struct usb_device_id *id)
 167 {
 168         struct dvb_usb_device *d;
 169         struct usb_host_interface *alt;
 170         int ret;
 171
 172         if (intf->num_altsetting < AU6610_ALTSETTING_COUNT)
 173                 return -ENODEV;
 174
 175         ret = dvb_usb_device_init(intf, &au6610_properties, THIS_MODULE, &d,
 176                                   adapter_nr);
 177         if (ret == 0) {
 178                 alt = usb_altnum_to_altsetting(intf, AU6610_ALTSETTING);
 179
 180                 if (alt == NULL) {
 181                         deb_info("%s: no alt found!\n", __func__);
 182                         return -ENODEV;
 183                 }
 184                 ret = usb_set_interface(d->udev, alt->desc.bInterfaceNumber,
 185                                         alt->desc.bAlternateSetting);
 186         }
 187
 188         return ret;
 189 }
 190
 191 static struct usb_device_id au6610_table [] = {
 192         { USB_DEVICE(USB_VID_ALCOR_MICRO, USB_PID_SIGMATEK_DVB_110) },
 193         { }             /* Terminating entry */
 194 };
 195 MODULE_DEVICE_TABLE(usb, au6610_table);
 196
 197 static struct dvb_usb_device_properties au6610_properties = {
 198         .caps = DVB_USB_IS_AN_I2C_ADAPTER,
 199
 200         .usb_ctrl = DEVICE_SPECIFIC,
 201
 202         .size_of_priv = 0,
 203
 204         .num_adapters = 1,
 205         .adapter = {
 206                 {
 207                         .frontend_attach  = au6610_zl10353_frontend_attach,
 208                         .tuner_attach     = au6610_qt1010_tuner_attach,
 209
 210                         .stream = {
 211                                 .type = USB_ISOC,
 212                                 .count = 5,
 213                                 .endpoint = 0x82,
 214                                 .u = {
 215                                         .isoc = {
 216                                                 .framesperurb = 40,
 217                                                 .framesize = 942,
 218                                                 .interval = 1,
 219                                         }
 220                                 }
 221                         },
 222                 }
 223         },
 224
 225         .i2c_algo = &au6610_i2c_algo,
 226
 227         .num_device_descs = 1,
 228         .devices = {
 229                 {
 230                         .name = "Sigmatek DVB-110 DVB-T USB2.0",
 231                         .cold_ids = {NULL},
 232                         .warm_ids = {&au6610_table[0], NULL},
 233                 },
 234         }
 235 };
 236
 237 static struct usb_driver au6610_driver = {
 238         .name       = "dvb_usb_au6610",
 239         .probe      = au6610_probe,
 240         .disconnect = dvb_usb_device_exit,
 241         .id_table   = au6610_table,
 242 };
 243
 244 /* module stuff */
 245 static int __init au6610_module_init(void)
 246 {
 247         int ret;
 248
 249         ret = usb_register(&au6610_driver);
 250         if (ret)
 251                 err("usb_register failed. Error number %d", ret);
 252
 253         return ret;
 254 }
 255
 256 static void __exit au6610_module_exit(void)
 257 {
 258         /* deregister this driver from the USB subsystem */
 259         usb_deregister(&au6610_driver);
 260 }
 261
 262 module_init(au6610_module_init);
 263 module_exit(au6610_module_exit);
 264
 265 MODULE_AUTHOR("Antti Palosaari <crope@iki.fi>");
 266 MODULE_DESCRIPTION("Driver for Alcor Micro AU6610 DVB-T USB2.0");
 267 MODULE_VERSION("0.1");
 268 MODULE_LICENSE("GPL");