kernel/drivers/media/usb/dvb-usb-v2/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 DVB_DEFINE_MOD_OPT_ADAPTER_NR(adapter_nr);
  26
  27 static int au6610_usb_msg(struct dvb_usb_device *d, u8 operation, u8 addr,
  28                           u8 *wbuf, u16 wlen, u8 *rbuf, u16 rlen)
  29 {
  30         int ret;
  31         u16 index;
  32         u8 *usb_buf;
  33
  34         /*
  35          * allocate enough for all known requests,
  36          * read returns 5 and write 6 bytes
  37          */
  38         usb_buf = kmalloc(6, GFP_KERNEL);
  39         if (!usb_buf)
  40                 return -ENOMEM;
  41
  42         switch (wlen) {
  43         case 1:
  44                 index = wbuf[0] << 8;
  45                 break;
  46         case 2:
  47                 index = wbuf[0] << 8;
  48                 index += wbuf[1];
  49                 break;
  50         default:
  51                 dev_err(&d->udev->dev, "%s: wlen=%d, aborting\n",
  52                                 KBUILD_MODNAME, wlen);
  53                 ret = -EINVAL;
  54                 goto error;
  55         }
  56
  57         ret = usb_control_msg(d->udev, usb_rcvctrlpipe(d->udev, 0), operation,
  58                               USB_TYPE_VENDOR|USB_DIR_IN, addr << 1, index,
  59                               usb_buf, 6, AU6610_USB_TIMEOUT);
  60
  61         dvb_usb_dbg_usb_control_msg(d->udev, operation,
  62                         (USB_TYPE_VENDOR|USB_DIR_IN), addr << 1, index,
  63                         usb_buf, 6);
  64
  65         if (ret < 0)
  66                 goto error;
  67
  68         switch (operation) {
  69         case AU6610_REQ_I2C_READ:
  70         case AU6610_REQ_USB_READ:
  71                 /* requested value is always 5th byte in buffer */
  72                 rbuf[0] = usb_buf[4];
  73         }
  74 error:
  75         kfree(usb_buf);
  76         return ret;
  77 }
  78
  79 static int au6610_i2c_msg(struct dvb_usb_device *d, u8 addr,
  80                           u8 *wbuf, u16 wlen, u8 *rbuf, u16 rlen)
  81 {
  82         u8 request;
  83         u8 wo = (rbuf == NULL || rlen == 0); /* write-only */
  84
  85         if (wo) {
  86                 request = AU6610_REQ_I2C_WRITE;
  87         } else { /* rw */
  88                 request = AU6610_REQ_I2C_READ;
  89         }
  90
  91         return au6610_usb_msg(d, request, addr, wbuf, wlen, rbuf, rlen);
  92 }
  93
  94
  95 /* I2C */
  96 static int au6610_i2c_xfer(struct i2c_adapter *adap, struct i2c_msg msg[],
  97                            int num)
  98 {
  99         struct dvb_usb_device *d = i2c_get_adapdata(adap);
 100         int i;
 101
 102         if (num > 2)
 103                 return -EINVAL;
 104
 105         if (mutex_lock_interruptible(&d->i2c_mutex) < 0)
 106                 return -EAGAIN;
 107
 108         for (i = 0; i < num; i++) {
 109                 /* write/read request */
 110                 if (i+1 < num && (msg[i+1].flags & I2C_M_RD)) {
 111                         if (au6610_i2c_msg(d, msg[i].addr, msg[i].buf,
 112                                            msg[i].len, msg[i+1].buf,
 113                                            msg[i+1].len) < 0)
 114                                 break;
 115                         i++;
 116                 } else if (au6610_i2c_msg(d, msg[i].addr, msg[i].buf,
 117                                                msg[i].len, NULL, 0) < 0)
 118                                 break;
 119         }
 120
 121         mutex_unlock(&d->i2c_mutex);
 122         return i;
 123 }
 124
 125
 126 static u32 au6610_i2c_func(struct i2c_adapter *adapter)
 127 {
 128         return I2C_FUNC_I2C;
 129 }
 130
 131 static struct i2c_algorithm au6610_i2c_algo = {
 132         .master_xfer   = au6610_i2c_xfer,
 133         .functionality = au6610_i2c_func,
 134 };
 135
 136 /* Callbacks for DVB USB */
 137 static struct zl10353_config au6610_zl10353_config = {
 138         .demod_address = 0x0f,
 139         .no_tuner = 1,
 140         .parallel_ts = 1,
 141 };
 142
 143 static int au6610_zl10353_frontend_attach(struct dvb_usb_adapter *adap)
 144 {
 145         adap->fe[0] = dvb_attach(zl10353_attach, &au6610_zl10353_config,
 146                         &adap_to_d(adap)->i2c_adap);
 147         if (adap->fe[0] == NULL)
 148                 return -ENODEV;
 149
 150         return 0;
 151 }
 152
 153 static struct qt1010_config au6610_qt1010_config = {
 154         .i2c_address = 0x62
 155 };
 156
 157 static int au6610_qt1010_tuner_attach(struct dvb_usb_adapter *adap)
 158 {
 159         return dvb_attach(qt1010_attach, adap->fe[0],
 160                         &adap_to_d(adap)->i2c_adap,
 161                         &au6610_qt1010_config) == NULL ? -ENODEV : 0;
 162 }
 163
 164 static int au6610_init(struct dvb_usb_device *d)
 165 {
 166         /* TODO: this functionality belongs likely to the streaming control */
 167         /* bInterfaceNumber 0, bAlternateSetting 5 */
 168         return usb_set_interface(d->udev, 0, 5);
 169 }
 170
 171 static struct dvb_usb_device_properties au6610_props = {
 172         .driver_name = KBUILD_MODNAME,
 173         .owner = THIS_MODULE,
 174         .adapter_nr = adapter_nr,
 175
 176         .i2c_algo = &au6610_i2c_algo,
 177         .frontend_attach = au6610_zl10353_frontend_attach,
 178         .tuner_attach = au6610_qt1010_tuner_attach,
 179         .init = au6610_init,
 180
 181         .num_adapters = 1,
 182         .adapter = {
 183                 {
 184                         .stream = DVB_USB_STREAM_ISOC(0x82, 5, 40, 942, 1),
 185                 },
 186         },
 187 };
 188
 189 static const struct usb_device_id au6610_id_table[] = {
 190         { DVB_USB_DEVICE(USB_VID_ALCOR_MICRO, USB_PID_SIGMATEK_DVB_110,
 191                 &au6610_props, "Sigmatek DVB-110", NULL) },
 192         { }
 193 };
 194 MODULE_DEVICE_TABLE(usb, au6610_id_table);
 195
 196 static struct usb_driver au6610_driver = {
 197         .name = KBUILD_MODNAME,
 198         .id_table = au6610_id_table,
 199         .probe = dvb_usbv2_probe,
 200         .disconnect = dvb_usbv2_disconnect,
 201         .suspend = dvb_usbv2_suspend,
 202         .resume = dvb_usbv2_resume,
 203         .reset_resume = dvb_usbv2_reset_resume,
 204         .no_dynamic_id = 1,
 205         .soft_unbind = 1,
 206 };
 207
 208 module_usb_driver(au6610_driver);
 209
 210 MODULE_AUTHOR("Antti Palosaari <crope@iki.fi>");
 211 MODULE_DESCRIPTION("Driver for Alcor Micro AU6610 DVB-T USB2.0");
 212 MODULE_VERSION("0.1");
 213 MODULE_LICENSE("GPL");