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   1 /* DVB USB compliant linux driver for Nebula Electronics uDigiTV DVB-T USB2.0
   2  * receiver
   3  *
   4  * Copyright (C) 2005 Patrick Boettcher (patrick.boettcher@desy.de)
   5  *
   6  * partly based on the SDK published by Nebula Electronics
   7  *
   8  *      This program is free software; you can redistribute it and/or modify it
   9  *      under the terms of the GNU General Public License as published by the Free
  10  *      Software Foundation, version 2.
  11  *
  12  * see Documentation/dvb/README.dvb-usb for more information
  13  */
  14 #include "digitv.h"
  15
  16 #include "mt352.h"
  17 #include "nxt6000.h"
  18
  19 /* debug */
  20 int dvb_usb_digitv_debug;
  21 module_param_named(debug,dvb_usb_digitv_debug, int, 0644);
  22 MODULE_PARM_DESC(debug, "set debugging level (1=rc (or-able))." DVB_USB_DEBUG_STATUS);
  23
  24 static int digitv_ctrl_msg(struct dvb_usb_device *d,
  25                 u8 cmd, u8 vv, u8 *wbuf, int wlen, u8 *rbuf, int rlen)
  26 {
  27         int wo = (rbuf == NULL || rlen == 0); /* write-only */
  28         u8 sndbuf[7],rcvbuf[7];
  29         memset(sndbuf,0,7); memset(rcvbuf,0,7);
  30
  31         sndbuf[0] = cmd;
  32         sndbuf[1] = vv;
  33         sndbuf[2] = wo ? wlen : rlen;
  34
  35         if (!wo) {
  36                 memcpy(&sndbuf[3],wbuf,wlen);
  37                 dvb_usb_generic_write(d,sndbuf,7);
  38         } else {
  39                 dvb_usb_generic_rw(d,sndbuf,7,rcvbuf,7,10);
  40                 memcpy(&rbuf,&rcvbuf[3],rlen);
  41         }
  42         return 0;
  43 }
  44
  45 /* I2C */
  46 static int digitv_i2c_xfer(struct i2c_adapter *adap,struct i2c_msg msg[],int num)
  47 {
  48         struct dvb_usb_device *d = i2c_get_adapdata(adap);
  49         int i;
  50
  51         if (down_interruptible(&d->i2c_sem) < 0)
  52                 return -EAGAIN;
  53
  54         if (num > 2)
  55                 warn("more than 2 i2c messages at a time is not handled yet. TODO.");
  56
  57         for (i = 0; i < num; i++) {
  58                 /* write/read request */
  59                 if (i+1 < num && (msg[i+1].flags & I2C_M_RD)) {
  60                         if (digitv_ctrl_msg(d, USB_READ_COFDM, msg[i].buf[0], NULL, 0,
  61                                                 msg[i+1].buf,msg[i+1].len) < 0)
  62                                 break;
  63                         i++;
  64                 } else
  65                         if (digitv_ctrl_msg(d,USB_WRITE_COFDM, msg[i].buf[0],
  66                                                 &msg[i].buf[1],msg[i].len-1,NULL,0) < 0)
  67                                 break;
  68         }
  69
  70         up(&d->i2c_sem);
  71         return i;
  72 }
  73
  74 static u32 digitv_i2c_func(struct i2c_adapter *adapter)
  75 {
  76         return I2C_FUNC_I2C;
  77 }
  78
  79 static struct i2c_algorithm digitv_i2c_algo = {
  80         .name          = "Nebula DigiTV USB I2C algorithm",
  81         .id            = I2C_ALGO_BIT,
  82         .master_xfer   = digitv_i2c_xfer,
  83         .functionality = digitv_i2c_func,
  84 };
  85
  86 /* Callbacks for DVB USB */
  87 static int digitv_identify_state (struct usb_device *udev, struct
  88                 dvb_usb_properties *props, struct dvb_usb_device_description **desc,
  89                 int *cold)
  90 {
  91         *cold = udev->descriptor.iManufacturer == 0 && udev->descriptor.iProduct == 0;
  92         return 0;
  93 }
  94
  95 static int digitv_mt352_demod_init(struct dvb_frontend *fe)
  96 {
  97         static u8 reset_buf[] = { 0x89, 0x38,  0x8a, 0x2d, 0x50, 0x80 };
  98         static u8 init_buf[] = { 0x68, 0xa0,  0x8e, 0x40,  0x53, 0x50,
  99                         0x67, 0x20,  0x7d, 0x01,  0x7c, 0x00,  0x7a, 0x00,
 100                         0x79, 0x20,  0x57, 0x05,  0x56, 0x31,  0x88, 0x0f,
 101                         0x75, 0x32 };
 102         int i;
 103
 104         for (i = 0; i < ARRAY_SIZE(reset_buf); i += 2)
 105                 mt352_write(fe, &reset_buf[i], 2);
 106
 107         msleep(1);
 108
 109         for (i = 0; i < ARRAY_SIZE(init_buf); i += 2)
 110                 mt352_write(fe, &init_buf[i], 2);
 111
 112         return 0;
 113 }
 114
 115 static struct mt352_config digitv_mt352_config = {
 116         .demod_address = 0x0, /* ignored by the digitv anyway */
 117         .demod_init = digitv_mt352_demod_init,
 118         .pll_set = dvb_usb_pll_set,
 119 };
 120
 121 static struct nxt6000_config digitv_nxt6000_config = {
 122         .demod_address = 0x0, /* ignored by the digitv anyway */
 123         .clock_inversion = 0x0,
 124
 125         .pll_init = NULL,
 126         .pll_set = NULL,
 127 };
 128
 129 static int digitv_frontend_attach(struct dvb_usb_device *d)
 130 {
 131         if ((d->fe = mt352_attach(&digitv_mt352_config, &d->i2c_adap)) != NULL)
 132                 return 0;
 133         if ((d->fe = nxt6000_attach(&digitv_nxt6000_config, &d->i2c_adap)) != NULL) {
 134
 135                 warn("nxt6000 support is not done yet, in fact you are one of the first "
 136                                 "person who wants to use this device in Linux. Please report to "
 137                                 "linux-dvb@linuxtv.org");
 138
 139                 return 0;
 140         }
 141         return -EIO;
 142 }
 143
 144 static int digitv_tuner_attach(struct dvb_usb_device *d)
 145 {
 146         d->pll_addr = 0x60;
 147         d->pll_desc = &dvb_pll_tded4;
 148         return 0;
 149 }
 150
 151 static struct dvb_usb_rc_key digitv_rc_keys[] = {
 152         { 0x00, 0x16, KEY_POWER }, /* dummy key */
 153 };
 154
 155 /* TODO is it really the NEC protocol ? */
 156 int digitv_rc_query(struct dvb_usb_device *d, u32 *event, int *state)
 157 {
 158         u8 key[5];
 159
 160         digitv_ctrl_msg(d,USB_READ_REMOTE,0,NULL,0,&key[1],4);
 161         /* TODO state, maybe it is VV ? */
 162         if (key[1] != 0)
 163                 key[0] = 0x01; /* if something is inside the buffer, simulate key press */
 164
 165         /* call the universal NEC remote processor, to find out the key's state and event */
 166         dvb_usb_nec_rc_key_to_event(d,key,event,state);
 167         if (key[0] != 0)
 168                 deb_rc("key: %x %x %x %x %x\n",key[0],key[1],key[2],key[3],key[4]);
 169         return 0;
 170 }
 171
 172 /* DVB USB Driver stuff */
 173 static struct dvb_usb_properties digitv_properties;
 174
 175 static int digitv_probe(struct usb_interface *intf,
 176                 const struct usb_device_id *id)
 177 {
 178         return dvb_usb_device_init(intf,&digitv_properties,THIS_MODULE);
 179 }
 180
 181 static struct usb_device_id digitv_table [] = {
 182                 { USB_DEVICE(USB_VID_ANCHOR, USB_PID_NEBULA_DIGITV) },
 183                 { }             /* Terminating entry */
 184 };
 185 MODULE_DEVICE_TABLE (usb, digitv_table);
 186
 187 static struct dvb_usb_properties digitv_properties = {
 188         .caps = DVB_USB_IS_AN_I2C_ADAPTER,
 189
 190         .usb_ctrl = CYPRESS_FX2,
 191         .firmware = "dvb-usb-digitv-01.fw",
 192
 193         .size_of_priv     = 0,
 194
 195         .frontend_attach  = digitv_frontend_attach,
 196         .tuner_attach     = digitv_tuner_attach,
 197
 198         .rc_interval      = 1000,
 199         .rc_key_map       = digitv_rc_keys,
 200         .rc_key_map_size  = ARRAY_SIZE(digitv_rc_keys),
 201         .rc_query         = digitv_rc_query,
 202
 203         .identify_state   = digitv_identify_state,
 204
 205         .i2c_algo         = &digitv_i2c_algo,
 206
 207         .generic_bulk_ctrl_endpoint = 0x01,
 208         /* parameter for the MPEG2-data transfer */
 209         .urb = {
 210                 .type = DVB_USB_BULK,
 211                 .count = 7,
 212                 .endpoint = 0x02,
 213                 .u = {
 214                         .bulk = {
 215                                 .buffersize = 4096,
 216                         }
 217                 }
 218         },
 219
 220         .num_device_descs = 1,
 221         .devices = {
 222                 {   "Nebula Electronics uDigiTV DVB-T USB2.0)",
 223                         { &digitv_table[0], NULL },
 224                         { NULL },
 225                 },
 226         }
 227 };
 228
 229 static struct usb_driver digitv_driver = {
 230         .owner          = THIS_MODULE,
 231         .name           = "Nebula Electronics uDigiTV DVB-T USB2.0 device",
 232         .probe          = digitv_probe,
 233         .disconnect = dvb_usb_device_exit,
 234         .id_table       = digitv_table,
 235 };
 236
 237 /* module stuff */
 238 static int __init digitv_module_init(void)
 239 {
 240         int result;
 241         if ((result = usb_register(&digitv_driver))) {
 242                 err("usb_register failed. Error number %d",result);
 243                 return result;
 244         }
 245
 246         return 0;
 247 }
 248
 249 static void __exit digitv_module_exit(void)
 250 {
 251         /* deregister this driver from the USB subsystem */
 252         usb_deregister(&digitv_driver);
 253 }
 254
 255 module_init (digitv_module_init);
 256 module_exit (digitv_module_exit);
 257
 258 MODULE_AUTHOR("Patrick Boettcher <patrick.boettcher@desy.de>");
 259 MODULE_DESCRIPTION("Driver for Nebula Electronics uDigiTV DVB-T USB2.0");
 260 MODULE_VERSION("1.0-alpha");
 261 MODULE_LICENSE("GPL");