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
  17 #include "au6610.h"
  18 #include "zl10353.h"
  19 #include "qt1010.h"
  20
  21 DVB_DEFINE_MOD_OPT_ADAPTER_NR(adapter_nr);
  22
  23 static int au6610_usb_msg(struct dvb_usb_device *d, u8 operation, u8 addr,
  24                           u8 *wbuf, u16 wlen, u8 *rbuf, u16 rlen)
  25 {
  26         int ret;
  27         u16 index;
  28         u8 *usb_buf;
  29
  30         /*
  31          * allocate enough for all known requests,
  32          * read returns 5 and write 6 bytes
  33          */
  34         usb_buf = kmalloc(6, GFP_KERNEL);
  35         if (!usb_buf)
  36                 return -ENOMEM;
  37
  38         switch (wlen) {
  39         case 1:
  40                 index = wbuf[0] << 8;
  41                 break;
  42         case 2:
  43                 index = wbuf[0] << 8;
  44                 index += wbuf[1];
  45                 break;
  46         default:
  47                 dev_err(&d->udev->dev, "%s: wlen=%d, aborting\n",
  48                                 KBUILD_MODNAME, wlen);
  49                 ret = -EINVAL;
  50                 goto error;
  51         }
  52
  53         ret = usb_control_msg(d->udev, usb_rcvctrlpipe(d->udev, 0), operation,
  54                               USB_TYPE_VENDOR|USB_DIR_IN, addr << 1, index,
  55                               usb_buf, 6, AU6610_USB_TIMEOUT);
  56
  57         dvb_usb_dbg_usb_control_msg(d->udev, operation,
  58                         (USB_TYPE_VENDOR|USB_DIR_IN), addr << 1, index,
  59                         usb_buf, 6);
  60
  61         if (ret < 0)
  62                 goto error;
  63
  64         switch (operation) {
  65         case AU6610_REQ_I2C_READ:
  66         case AU6610_REQ_USB_READ:
  67                 /* requested value is always 5th byte in buffer */
  68                 rbuf[0] = usb_buf[4];
  69         }
  70 error:
  71         kfree(usb_buf);
  72         return ret;
  73 }
  74
  75 static int au6610_i2c_msg(struct dvb_usb_device *d, u8 addr,
  76                           u8 *wbuf, u16 wlen, u8 *rbuf, u16 rlen)
  77 {
  78         u8 request;
  79         u8 wo = (rbuf == NULL || rlen == 0); /* write-only */
  80
  81         if (wo) {
  82                 request = AU6610_REQ_I2C_WRITE;
  83         } else { /* rw */
  84                 request = AU6610_REQ_I2C_READ;
  85         }
  86
  87         return au6610_usb_msg(d, request, addr, wbuf, wlen, rbuf, rlen);
  88 }
  89
  90
  91 /* I2C */
  92 static int au6610_i2c_xfer(struct i2c_adapter *adap, struct i2c_msg msg[],
  93                            int num)
  94 {
  95         struct dvb_usb_device *d = i2c_get_adapdata(adap);
  96         int i;
  97
  98         if (num > 2)
  99                 return -EINVAL;
 100
 101         if (mutex_lock_interruptible(&d->i2c_mutex) < 0)
 102                 return -EAGAIN;
 103
 104         for (i = 0; i < num; i++) {
 105                 /* write/read request */
 106                 if (i+1 < num && (msg[i+1].flags & I2C_M_RD)) {
 107                         if (au6610_i2c_msg(d, msg[i].addr, msg[i].buf,
 108                                            msg[i].len, msg[i+1].buf,
 109                                            msg[i+1].len) < 0)
 110                                 break;
 111                         i++;
 112                 } else if (au6610_i2c_msg(d, msg[i].addr, msg[i].buf,
 113                                                msg[i].len, NULL, 0) < 0)
 114                                 break;
 115         }
 116
 117         mutex_unlock(&d->i2c_mutex);
 118         return i;
 119 }
 120
 121
 122 static u32 au6610_i2c_func(struct i2c_adapter *adapter)
 123 {
 124         return I2C_FUNC_I2C;
 125 }
 126
 127 static struct i2c_algorithm au6610_i2c_algo = {
 128         .master_xfer   = au6610_i2c_xfer,
 129         .functionality = au6610_i2c_func,
 130 };
 131
 132 /* Callbacks for DVB USB */
 133 static struct zl10353_config au6610_zl10353_config = {
 134         .demod_address = 0x0f,
 135         .no_tuner = 1,
 136         .parallel_ts = 1,
 137 };
 138
 139 static int au6610_zl10353_frontend_attach(struct dvb_usb_adapter *adap)
 140 {
 141         adap->fe[0] = dvb_attach(zl10353_attach, &au6610_zl10353_config,
 142                         &adap_to_d(adap)->i2c_adap);
 143         if (adap->fe[0] == NULL)
 144                 return -ENODEV;
 145
 146         return 0;
 147 }
 148
 149 static struct qt1010_config au6610_qt1010_config = {
 150         .i2c_address = 0x62
 151 };
 152
 153 static int au6610_qt1010_tuner_attach(struct dvb_usb_adapter *adap)
 154 {
 155         return dvb_attach(qt1010_attach, adap->fe[0],
 156                         &adap_to_d(adap)->i2c_adap,
 157                         &au6610_qt1010_config) == NULL ? -ENODEV : 0;
 158 }
 159
 160 static int au6610_init(struct dvb_usb_device *d)
 161 {
 162         /* TODO: this functionality belongs likely to the streaming control */
 163         /* bInterfaceNumber 0, bAlternateSetting 5 */
 164         return usb_set_interface(d->udev, 0, 5);
 165 }
 166
 167 static struct dvb_usb_device_properties au6610_props = {
 168         .driver_name = KBUILD_MODNAME,
 169         .owner = THIS_MODULE,
 170         .adapter_nr = adapter_nr,
 171
 172         .i2c_algo = &au6610_i2c_algo,
 173         .frontend_attach = au6610_zl10353_frontend_attach,
 174         .tuner_attach = au6610_qt1010_tuner_attach,
 175         .init = au6610_init,
 176
 177         .num_adapters = 1,
 178         .adapter = {
 179                 {
 180                         .stream = DVB_USB_STREAM_ISOC(0x82, 5, 40, 942, 1),
 181                 },
 182         },
 183 };
 184
 185 static const struct usb_device_id au6610_id_table[] = {
 186         { DVB_USB_DEVICE(USB_VID_ALCOR_MICRO, USB_PID_SIGMATEK_DVB_110,
 187                 &au6610_props, "Sigmatek DVB-110", NULL) },
 188         { }
 189 };
 190 MODULE_DEVICE_TABLE(usb, au6610_id_table);
 191
 192 static struct usb_driver au6610_driver = {
 193         .name = KBUILD_MODNAME,
 194         .id_table = au6610_id_table,
 195         .probe = dvb_usbv2_probe,
 196         .disconnect = dvb_usbv2_disconnect,
 197         .suspend = dvb_usbv2_suspend,
 198         .resume = dvb_usbv2_resume,
 199         .reset_resume = dvb_usbv2_reset_resume,
 200         .no_dynamic_id = 1,
 201         .soft_unbind = 1,
 202 };
 203
 204 module_usb_driver(au6610_driver);
 205
 206 MODULE_AUTHOR("Antti Palosaari <crope@iki.fi>");
 207 MODULE_DESCRIPTION("Driver for Alcor Micro AU6610 DVB-T USB2.0");
 208 MODULE_VERSION("0.1");
 209 MODULE_LICENSE("GPL");