drivers/media/usb/dvb-usb/dtv5100.c

   1 // SPDX-License-Identifier: GPL-2.0-or-later
   2 /*
   3  * DVB USB Linux driver for AME DTV-5100 USB2.0 DVB-T
   4  *
   5  * Copyright (C) 2008  Antoine Jacquet <royale@zerezo.com>
   6  * http://royale.zerezo.com/dtv5100/
   7  *
   8  * Inspired by gl861.c and au6610.c drivers
   9  */
  10
  11 #include "dtv5100.h"
  12 #include "zl10353.h"
  13 #include "qt1010.h"
  14
  15 /* debug */
  16 static int dvb_usb_dtv5100_debug;
  17 module_param_named(debug, dvb_usb_dtv5100_debug, int, 0644);
  18 MODULE_PARM_DESC(debug, "set debugging level" DVB_USB_DEBUG_STATUS);
  19 DVB_DEFINE_MOD_OPT_ADAPTER_NR(adapter_nr);
  20
  21 struct dtv5100_state {
  22         unsigned char data[80];
  23 };
  24
  25 static int dtv5100_i2c_msg(struct dvb_usb_device *d, u8 addr,
  26                            u8 *wbuf, u16 wlen, u8 *rbuf, u16 rlen)
  27 {
  28         struct dtv5100_state *st = d->priv;
  29         unsigned int pipe;
  30         u8 request;
  31         u8 type;
  32         u16 value;
  33         u16 index;
  34
  35         switch (wlen) {
  36         case 1:
  37                 /* write { reg }, read { value } */
  38                 pipe = usb_rcvctrlpipe(d->udev, 0);
  39                 request = (addr == DTV5100_DEMOD_ADDR ? DTV5100_DEMOD_READ :
  40                                                         DTV5100_TUNER_READ);
  41                 type = USB_TYPE_VENDOR | USB_DIR_IN;
  42                 value = 0;
  43                 break;
  44         case 2:
  45                 /* write { reg, value } */
  46                 pipe = usb_sndctrlpipe(d->udev, 0);
  47                 request = (addr == DTV5100_DEMOD_ADDR ? DTV5100_DEMOD_WRITE :
  48                                                         DTV5100_TUNER_WRITE);
  49                 type = USB_TYPE_VENDOR | USB_DIR_OUT;
  50                 value = wbuf[1];
  51                 break;
  52         default:
  53                 warn("wlen = %x, aborting.", wlen);
  54                 return -EINVAL;
  55         }
  56         index = (addr << 8) + wbuf[0];
  57
  58         memcpy(st->data, rbuf, rlen);
  59         msleep(1); /* avoid I2C errors */
  60         return usb_control_msg(d->udev, pipe, request,
  61                                type, value, index, st->data, rlen,
  62                                DTV5100_USB_TIMEOUT);
  63 }
  64
  65 /* I2C */
  66 static int dtv5100_i2c_xfer(struct i2c_adapter *adap, struct i2c_msg msg[],
  67                             int num)
  68 {
  69         struct dvb_usb_device *d = i2c_get_adapdata(adap);
  70         int i;
  71
  72         if (num > 2)
  73                 return -EINVAL;
  74
  75         if (mutex_lock_interruptible(&d->i2c_mutex) < 0)
  76                 return -EAGAIN;
  77
  78         for (i = 0; i < num; i++) {
  79                 /* write/read request */
  80                 if (i+1 < num && (msg[i+1].flags & I2C_M_RD)) {
  81                         if (dtv5100_i2c_msg(d, msg[i].addr, msg[i].buf,
  82                                             msg[i].len, msg[i+1].buf,
  83                                             msg[i+1].len) < 0)
  84                                 break;
  85                         i++;
  86                 } else if (dtv5100_i2c_msg(d, msg[i].addr, msg[i].buf,
  87                                            msg[i].len, NULL, 0) < 0)
  88                                 break;
  89         }
  90
  91         mutex_unlock(&d->i2c_mutex);
  92         return i;
  93 }
  94
  95 static u32 dtv5100_i2c_func(struct i2c_adapter *adapter)
  96 {
  97         return I2C_FUNC_I2C;
  98 }
  99
 100 static struct i2c_algorithm dtv5100_i2c_algo = {
 101         .master_xfer   = dtv5100_i2c_xfer,
 102         .functionality = dtv5100_i2c_func,
 103 };
 104
 105 /* Callbacks for DVB USB */
 106 static struct zl10353_config dtv5100_zl10353_config = {
 107         .demod_address = DTV5100_DEMOD_ADDR,
 108         .no_tuner = 1,
 109         .parallel_ts = 1,
 110 };
 111
 112 static int dtv5100_frontend_attach(struct dvb_usb_adapter *adap)
 113 {
 114         adap->fe_adap[0].fe = dvb_attach(zl10353_attach, &dtv5100_zl10353_config,
 115                               &adap->dev->i2c_adap);
 116         if (adap->fe_adap[0].fe == NULL)
 117                 return -EIO;
 118
 119         /* disable i2c gate, or it won't work... is this safe? */
 120         adap->fe_adap[0].fe->ops.i2c_gate_ctrl = NULL;
 121
 122         return 0;
 123 }
 124
 125 static struct qt1010_config dtv5100_qt1010_config = {
 126         .i2c_address = DTV5100_TUNER_ADDR
 127 };
 128
 129 static int dtv5100_tuner_attach(struct dvb_usb_adapter *adap)
 130 {
 131         return dvb_attach(qt1010_attach,
 132                           adap->fe_adap[0].fe, &adap->dev->i2c_adap,
 133                           &dtv5100_qt1010_config) == NULL ? -ENODEV : 0;
 134 }
 135
 136 /* DVB USB Driver stuff */
 137 static struct dvb_usb_device_properties dtv5100_properties;
 138
 139 static int dtv5100_probe(struct usb_interface *intf,
 140                          const struct usb_device_id *id)
 141 {
 142         int i, ret;
 143         struct usb_device *udev = interface_to_usbdev(intf);
 144
 145         /* initialize non qt1010/zl10353 part? */
 146         for (i = 0; dtv5100_init[i].request; i++) {
 147                 ret = usb_control_msg(udev, usb_sndctrlpipe(udev, 0),
 148                                       dtv5100_init[i].request,
 149                                       USB_TYPE_VENDOR | USB_DIR_OUT,
 150                                       dtv5100_init[i].value,
 151                                       dtv5100_init[i].index, NULL, 0,
 152                                       DTV5100_USB_TIMEOUT);
 153                 if (ret)
 154                         return ret;
 155         }
 156
 157         ret = dvb_usb_device_init(intf, &dtv5100_properties,
 158                                   THIS_MODULE, NULL, adapter_nr);
 159         if (ret)
 160                 return ret;
 161
 162         return 0;
 163 }
 164
 165 enum {
 166         AME_DTV5100,
 167 };
 168
 169 static struct usb_device_id dtv5100_table[] = {
 170         DVB_USB_DEV(AME, AME_DTV5100),
 171         { }
 172 };
 173
 174 MODULE_DEVICE_TABLE(usb, dtv5100_table);
 175
 176 static struct dvb_usb_device_properties dtv5100_properties = {
 177         .caps = DVB_USB_IS_AN_I2C_ADAPTER,
 178         .usb_ctrl = DEVICE_SPECIFIC,
 179
 180         .size_of_priv = sizeof(struct dtv5100_state),
 181
 182         .num_adapters = 1,
 183         .adapter = {{
 184                 .num_frontends = 1,
 185                 .fe = {{
 186                 .frontend_attach = dtv5100_frontend_attach,
 187                 .tuner_attach    = dtv5100_tuner_attach,
 188
 189                 .stream = {
 190                         .type = USB_BULK,
 191                         .count = 8,
 192                         .endpoint = 0x82,
 193                         .u = {
 194                                 .bulk = {
 195                                         .buffersize = 4096,
 196                                 }
 197                         }
 198                 },
 199                 }},
 200         } },
 201
 202         .i2c_algo = &dtv5100_i2c_algo,
 203
 204         .num_device_descs = 1,
 205         .devices = {
 206                 {
 207                         .name = "AME DTV-5100 USB2.0 DVB-T",
 208                         .cold_ids = { NULL },
 209                         .warm_ids = { &dtv5100_table[AME_DTV5100], NULL },
 210                 },
 211         }
 212 };
 213
 214 static struct usb_driver dtv5100_driver = {
 215         .name           = "dvb_usb_dtv5100",
 216         .probe          = dtv5100_probe,
 217         .disconnect     = dvb_usb_device_exit,
 218         .id_table       = dtv5100_table,
 219 };
 220
 221 module_usb_driver(dtv5100_driver);
 222
 223 MODULE_AUTHOR(DRIVER_AUTHOR);
 224 MODULE_DESCRIPTION(DRIVER_DESC);
 225 MODULE_LICENSE("GPL");