drivers/media/usb/dvb-usb-v2/au6610.c

   1 // SPDX-License-Identifier: GPL-2.0-or-later
   2 /*
   3  * DVB USB Linux driver for Alcor Micro AU6610 DVB-T USB2.0.
   4  *
   5  * Copyright (C) 2006 Antti Palosaari <crope@iki.fi>
   6  */
   7
   8 #include "au6610.h"
   9 #include "zl10353.h"
  10 #include "qt1010.h"
  11
  12 DVB_DEFINE_MOD_OPT_ADAPTER_NR(adapter_nr);
  13
  14 static int au6610_usb_msg(struct dvb_usb_device *d, u8 operation, u8 addr,
  15                           u8 *wbuf, u16 wlen, u8 *rbuf, u16 rlen)
  16 {
  17         int ret;
  18         u16 index;
  19         u8 *usb_buf;
  20
  21         /*
  22          * allocate enough for all known requests,
  23          * read returns 5 and write 6 bytes
  24          */
  25         usb_buf = kmalloc(6, GFP_KERNEL);
  26         if (!usb_buf)
  27                 return -ENOMEM;
  28
  29         switch (wlen) {
  30         case 1:
  31                 index = wbuf[0] << 8;
  32                 break;
  33         case 2:
  34                 index = wbuf[0] << 8;
  35                 index += wbuf[1];
  36                 break;
  37         default:
  38                 dev_err(&d->udev->dev, "%s: wlen=%d, aborting\n",
  39                                 KBUILD_MODNAME, wlen);
  40                 ret = -EINVAL;
  41                 goto error;
  42         }
  43
  44         ret = usb_control_msg(d->udev, usb_rcvctrlpipe(d->udev, 0), operation,
  45                               USB_TYPE_VENDOR|USB_DIR_IN, addr << 1, index,
  46                               usb_buf, 6, AU6610_USB_TIMEOUT);
  47
  48         dvb_usb_dbg_usb_control_msg(d->udev, operation,
  49                         (USB_TYPE_VENDOR|USB_DIR_IN), addr << 1, index,
  50                         usb_buf, 6);
  51
  52         if (ret < 0)
  53                 goto error;
  54
  55         switch (operation) {
  56         case AU6610_REQ_I2C_READ:
  57         case AU6610_REQ_USB_READ:
  58                 /* requested value is always 5th byte in buffer */
  59                 rbuf[0] = usb_buf[4];
  60         }
  61 error:
  62         kfree(usb_buf);
  63         return ret;
  64 }
  65
  66 static int au6610_i2c_msg(struct dvb_usb_device *d, u8 addr,
  67                           u8 *wbuf, u16 wlen, u8 *rbuf, u16 rlen)
  68 {
  69         u8 request;
  70         u8 wo = (rbuf == NULL || rlen == 0); /* write-only */
  71
  72         if (wo) {
  73                 request = AU6610_REQ_I2C_WRITE;
  74         } else { /* rw */
  75                 request = AU6610_REQ_I2C_READ;
  76         }
  77
  78         return au6610_usb_msg(d, request, addr, wbuf, wlen, rbuf, rlen);
  79 }
  80
  81
  82 /* I2C */
  83 static int au6610_i2c_xfer(struct i2c_adapter *adap, struct i2c_msg msg[],
  84                            int num)
  85 {
  86         struct dvb_usb_device *d = i2c_get_adapdata(adap);
  87         int i;
  88
  89         if (num > 2)
  90                 return -EINVAL;
  91
  92         if (mutex_lock_interruptible(&d->i2c_mutex) < 0)
  93                 return -EAGAIN;
  94
  95         for (i = 0; i < num; i++) {
  96                 /* write/read request */
  97                 if (i+1 < num && (msg[i+1].flags & I2C_M_RD)) {
  98                         if (au6610_i2c_msg(d, msg[i].addr, msg[i].buf,
  99                                            msg[i].len, msg[i+1].buf,
 100                                            msg[i+1].len) < 0)
 101                                 break;
 102                         i++;
 103                 } else if (au6610_i2c_msg(d, msg[i].addr, msg[i].buf,
 104                                                msg[i].len, NULL, 0) < 0)
 105                                 break;
 106         }
 107
 108         mutex_unlock(&d->i2c_mutex);
 109         return i;
 110 }
 111
 112
 113 static u32 au6610_i2c_func(struct i2c_adapter *adapter)
 114 {
 115         return I2C_FUNC_I2C;
 116 }
 117
 118 static struct i2c_algorithm au6610_i2c_algo = {
 119         .master_xfer   = au6610_i2c_xfer,
 120         .functionality = au6610_i2c_func,
 121 };
 122
 123 /* Callbacks for DVB USB */
 124 static struct zl10353_config au6610_zl10353_config = {
 125         .demod_address = 0x0f,
 126         .no_tuner = 1,
 127         .parallel_ts = 1,
 128 };
 129
 130 static int au6610_zl10353_frontend_attach(struct dvb_usb_adapter *adap)
 131 {
 132         adap->fe[0] = dvb_attach(zl10353_attach, &au6610_zl10353_config,
 133                         &adap_to_d(adap)->i2c_adap);
 134         if (adap->fe[0] == NULL)
 135                 return -ENODEV;
 136
 137         return 0;
 138 }
 139
 140 static struct qt1010_config au6610_qt1010_config = {
 141         .i2c_address = 0x62
 142 };
 143
 144 static int au6610_qt1010_tuner_attach(struct dvb_usb_adapter *adap)
 145 {
 146         return dvb_attach(qt1010_attach, adap->fe[0],
 147                         &adap_to_d(adap)->i2c_adap,
 148                         &au6610_qt1010_config) == NULL ? -ENODEV : 0;
 149 }
 150
 151 static int au6610_init(struct dvb_usb_device *d)
 152 {
 153         /* TODO: this functionality belongs likely to the streaming control */
 154         /* bInterfaceNumber 0, bAlternateSetting 5 */
 155         return usb_set_interface(d->udev, 0, 5);
 156 }
 157
 158 static struct dvb_usb_device_properties au6610_props = {
 159         .driver_name = KBUILD_MODNAME,
 160         .owner = THIS_MODULE,
 161         .adapter_nr = adapter_nr,
 162
 163         .i2c_algo = &au6610_i2c_algo,
 164         .frontend_attach = au6610_zl10353_frontend_attach,
 165         .tuner_attach = au6610_qt1010_tuner_attach,
 166         .init = au6610_init,
 167
 168         .num_adapters = 1,
 169         .adapter = {
 170                 {
 171                         .stream = DVB_USB_STREAM_ISOC(0x82, 5, 40, 942, 1),
 172                 },
 173         },
 174 };
 175
 176 static const struct usb_device_id au6610_id_table[] = {
 177         { DVB_USB_DEVICE(USB_VID_ALCOR_MICRO, USB_PID_SIGMATEK_DVB_110,
 178                 &au6610_props, "Sigmatek DVB-110", NULL) },
 179         { }
 180 };
 181 MODULE_DEVICE_TABLE(usb, au6610_id_table);
 182
 183 static struct usb_driver au6610_driver = {
 184         .name = KBUILD_MODNAME,
 185         .id_table = au6610_id_table,
 186         .probe = dvb_usbv2_probe,
 187         .disconnect = dvb_usbv2_disconnect,
 188         .suspend = dvb_usbv2_suspend,
 189         .resume = dvb_usbv2_resume,
 190         .reset_resume = dvb_usbv2_reset_resume,
 191         .no_dynamic_id = 1,
 192         .soft_unbind = 1,
 193 };
 194
 195 module_usb_driver(au6610_driver);
 196
 197 MODULE_AUTHOR("Antti Palosaari <crope@iki.fi>");
 198 MODULE_DESCRIPTION("Driver for Alcor Micro AU6610 DVB-T USB2.0");
 199 MODULE_VERSION("0.1");
 200 MODULE_LICENSE("GPL");