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

   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 (mutex_lock_interruptible(&d->i2c_mutex) < 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         mutex_unlock(&d->i2c_mutex);
  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         .master_xfer   = digitv_i2c_xfer,
  81         .functionality = digitv_i2c_func,
  82 };
  83
  84 /* Callbacks for DVB USB */
  85 static int digitv_identify_state (struct usb_device *udev, struct
  86                 dvb_usb_properties *props, struct dvb_usb_device_description **desc,
  87                 int *cold)
  88 {
  89         *cold = udev->descriptor.iManufacturer == 0 && udev->descriptor.iProduct == 0;
  90         return 0;
  91 }
  92
  93 static int digitv_mt352_demod_init(struct dvb_frontend *fe)
  94 {
  95         static u8 reset_buf[] = { 0x89, 0x38,  0x8a, 0x2d, 0x50, 0x80 };
  96         static u8 init_buf[] = { 0x68, 0xa0,  0x8e, 0x40,  0x53, 0x50,
  97                         0x67, 0x20,  0x7d, 0x01,  0x7c, 0x00,  0x7a, 0x00,
  98                         0x79, 0x20,  0x57, 0x05,  0x56, 0x31,  0x88, 0x0f,
  99                         0x75, 0x32 };
 100         int i;
 101
 102         for (i = 0; i < ARRAY_SIZE(reset_buf); i += 2)
 103                 mt352_write(fe, &reset_buf[i], 2);
 104
 105         msleep(1);
 106
 107         for (i = 0; i < ARRAY_SIZE(init_buf); i += 2)
 108                 mt352_write(fe, &init_buf[i], 2);
 109
 110         return 0;
 111 }
 112
 113 static struct mt352_config digitv_mt352_config = {
 114         .demod_init = digitv_mt352_demod_init,
 115 };
 116
 117 static int digitv_nxt6000_tuner_set_params(struct dvb_frontend *fe, struct dvb_frontend_parameters *fep)
 118 {
 119         struct dvb_usb_device *d = fe->dvb->priv;
 120         u8 b[5];
 121         dvb_usb_tuner_pllbuf(fe,fep,b, 5);
 122         return digitv_ctrl_msg(d,USB_WRITE_TUNER,0,&b[1],4,NULL,0);
 123 }
 124
 125 static struct nxt6000_config digitv_nxt6000_config = {
 126         .clock_inversion = 1,
 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                 d->fe->ops->tuner_ops.pllbuf = dvb_usb_tuner_pllbuf;
 133                 return 0;
 134         }
 135         if ((d->fe = nxt6000_attach(&digitv_nxt6000_config, &d->i2c_adap)) != NULL) {
 136                 d->fe->ops->tuner_ops.set_params = digitv_nxt6000_tuner_set_params;
 137                 return 0;
 138         }
 139         return -EIO;
 140 }
 141
 142 static int digitv_tuner_attach(struct dvb_usb_device *d)
 143 {
 144         d->pll_addr = 0x60;
 145         d->pll_desc = &dvb_pll_tded4;
 146         return 0;
 147 }
 148
 149 static struct dvb_usb_rc_key digitv_rc_keys[] = {
 150         { 0x00, 0x16, KEY_POWER }, /* dummy key */
 151 };
 152
 153 /* TODO is it really the NEC protocol ? */
 154 static int digitv_rc_query(struct dvb_usb_device *d, u32 *event, int *state)
 155 {
 156         u8 key[5];
 157
 158         digitv_ctrl_msg(d,USB_READ_REMOTE,0,NULL,0,&key[1],4);
 159         /* TODO state, maybe it is VV ? */
 160         if (key[1] != 0)
 161                 key[0] = 0x01; /* if something is inside the buffer, simulate key press */
 162
 163         /* call the universal NEC remote processor, to find out the key's state and event */
 164         dvb_usb_nec_rc_key_to_event(d,key,event,state);
 165         if (key[0] != 0)
 166                 deb_rc("key: %x %x %x %x %x\n",key[0],key[1],key[2],key[3],key[4]);
 167         return 0;
 168 }
 169
 170 /* DVB USB Driver stuff */
 171 static struct dvb_usb_properties digitv_properties;
 172
 173 static int digitv_probe(struct usb_interface *intf,
 174                 const struct usb_device_id *id)
 175 {
 176         struct dvb_usb_device *d;
 177         int ret;
 178         if ((ret = dvb_usb_device_init(intf,&digitv_properties,THIS_MODULE,&d)) == 0) {
 179                 u8 b[4] = { 0 };
 180
 181                 if (d != NULL) { /* do that only when the firmware is loaded */
 182                         b[0] = 1;
 183                         digitv_ctrl_msg(d,USB_WRITE_REMOTE_TYPE,0,b,4,NULL,0);
 184
 185                         b[0] = 0;
 186                         digitv_ctrl_msg(d,USB_WRITE_REMOTE,0,b,4,NULL,0);
 187                 }
 188         }
 189         return ret;
 190 }
 191
 192 static struct usb_device_id digitv_table [] = {
 193                 { USB_DEVICE(USB_VID_ANCHOR, USB_PID_NEBULA_DIGITV) },
 194                 { }             /* Terminating entry */
 195 };
 196 MODULE_DEVICE_TABLE (usb, digitv_table);
 197
 198 static struct dvb_usb_properties digitv_properties = {
 199         .caps = DVB_USB_IS_AN_I2C_ADAPTER,
 200
 201         .usb_ctrl = CYPRESS_FX2,
 202         .firmware = "dvb-usb-digitv-02.fw",
 203
 204         .size_of_priv     = 0,
 205
 206         .frontend_attach  = digitv_frontend_attach,
 207         .tuner_attach     = digitv_tuner_attach,
 208
 209         .rc_interval      = 1000,
 210         .rc_key_map       = digitv_rc_keys,
 211         .rc_key_map_size  = ARRAY_SIZE(digitv_rc_keys),
 212         .rc_query         = digitv_rc_query,
 213
 214         .identify_state   = digitv_identify_state,
 215
 216         .i2c_algo         = &digitv_i2c_algo,
 217
 218         .generic_bulk_ctrl_endpoint = 0x01,
 219         /* parameter for the MPEG2-data transfer */
 220         .urb = {
 221                 .type = DVB_USB_BULK,
 222                 .count = 7,
 223                 .endpoint = 0x02,
 224                 .u = {
 225                         .bulk = {
 226                                 .buffersize = 4096,
 227                         }
 228                 }
 229         },
 230
 231         .num_device_descs = 1,
 232         .devices = {
 233                 {   "Nebula Electronics uDigiTV DVB-T USB2.0)",
 234                         { &digitv_table[0], NULL },
 235                         { NULL },
 236                 },
 237                 { NULL },
 238         }
 239 };
 240
 241 static struct usb_driver digitv_driver = {
 242         .name           = "dvb_usb_digitv",
 243         .probe          = digitv_probe,
 244         .disconnect = dvb_usb_device_exit,
 245         .id_table       = digitv_table,
 246 };
 247
 248 /* module stuff */
 249 static int __init digitv_module_init(void)
 250 {
 251         int result;
 252         if ((result = usb_register(&digitv_driver))) {
 253                 err("usb_register failed. Error number %d",result);
 254                 return result;
 255         }
 256
 257         return 0;
 258 }
 259
 260 static void __exit digitv_module_exit(void)
 261 {
 262         /* deregister this driver from the USB subsystem */
 263         usb_deregister(&digitv_driver);
 264 }
 265
 266 module_init (digitv_module_init);
 267 module_exit (digitv_module_exit);
 268
 269 MODULE_AUTHOR("Patrick Boettcher <patrick.boettcher@desy.de>");
 270 MODULE_DESCRIPTION("Driver for Nebula Electronics uDigiTV DVB-T USB2.0");
 271 MODULE_VERSION("1.0-alpha");
 272 MODULE_LICENSE("GPL");