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) and
   5  *                    Allan Third (allan.third@cs.man.ac.uk)
   6  *
   7  * partly based on the SDK published by Nebula Electronics (TODO do we want this line ?)
   8  *
   9  *      This program is free software; you can redistribute it and/or modify it
  10  *      under the terms of the GNU General Public License as published by the Free
  11  *      Software Foundation, version 2.
  12  *
  13  * see Documentation/dvb/README.dvb-usb for more information
  14  */
  15 #include "digitv.h"
  16
  17 #include "mt352.h"
  18 #include "nxt6000.h"
  19
  20 /* debug */
  21 int dvb_usb_digitv_debug;
  22 module_param_named(debug,dvb_usb_digitv_debug, int, 0644);
  23 MODULE_PARM_DESC(debug, "set debugging level (1=rc (or-able))." DVB_USB_DEBUG_STATUS);
  24
  25 static int digitv_ctrl_msg(struct dvb_usb_device *d,
  26                 u8 cmd, u8 vv, u8 *wbuf, int wlen, u8 *rbuf, int rlen)
  27 {
  28         int wo = (rbuf == NULL || rlen == 0); /* write-only */
  29         u8 sndbuf[7],rcvbuf[7];
  30         memset(sndbuf,0,7); memset(rcvbuf,0,7);
  31
  32         sndbuf[0] = cmd;
  33         sndbuf[1] = vv;
  34         sndbuf[2] = wo ? wlen : rlen;
  35
  36         if (!wo) {
  37                 memcpy(&sndbuf[3],wbuf,wlen);
  38                 dvb_usb_generic_write(d,sndbuf,7);
  39         } else {
  40                 dvb_usb_generic_rw(d,sndbuf,7,rcvbuf,7,10);
  41                 memcpy(&rbuf,&rcvbuf[3],rlen);
  42         }
  43         return 0;
  44 }
  45
  46 /* I2C */
  47 static int digitv_i2c_xfer(struct i2c_adapter *adap,struct i2c_msg msg[],int num)
  48 {
  49         struct dvb_usb_device *d = i2c_get_adapdata(adap);
  50         int i;
  51
  52         if (down_interruptible(&d->i2c_sem) < 0)
  53                 return -EAGAIN;
  54
  55         if (num > 2)
  56                 warn("more than 2 i2c messages at a time is not handled yet. TODO.");
  57
  58         for (i = 0; i < num; i++) {
  59                 /* write/read request */
  60                 if (i+1 < num && (msg[i+1].flags & I2C_M_RD)) {
  61                         if (digitv_ctrl_msg(d, USB_READ_COFDM, msg[i].buf[0], NULL, 0,
  62                                                 msg[i+1].buf,msg[i+1].len) < 0)
  63                                 break;
  64                         i++;
  65                 } else
  66                         if (digitv_ctrl_msg(d,USB_WRITE_COFDM, msg[i].buf[0],
  67                                                 &msg[i].buf[1],msg[i].len-1,NULL,0) < 0)
  68                                 break;
  69         }
  70
  71         up(&d->i2c_sem);
  72         return i;
  73 }
  74
  75 static u32 digitv_i2c_func(struct i2c_adapter *adapter)
  76 {
  77         return I2C_FUNC_I2C;
  78 }
  79
  80 static struct i2c_algorithm digitv_i2c_algo = {
  81         .name          = "Nebula DigiTV USB I2C algorithm",
  82         .id            = I2C_ALGO_BIT,
  83         .master_xfer   = digitv_i2c_xfer,
  84         .functionality = digitv_i2c_func,
  85 };
  86
  87 /* Callbacks for DVB USB */
  88 static int digitv_identify_state (struct usb_device *udev, struct
  89                 dvb_usb_properties *props, struct dvb_usb_device_description **desc,
  90                 int *cold)
  91 {
  92         *cold = udev->descriptor.iManufacturer == 0 && udev->descriptor.iProduct == 0;
  93         return 0;
  94 }
  95
  96 static int digitv_mt352_demod_init(struct dvb_frontend *fe)
  97 {
  98         static u8 mt352_clock_config[] = { 0x89, 0x38, 0x2d };
  99         static u8 mt352_reset[] = { 0x50, 0x80 };
 100         static u8 mt352_mclk_ratio[] = { 0x8b, 0x00 };
 101
 102         static u8 mt352_agc_cfg[] = { 0x68, 0xa0 };
 103         static u8 mt352_adc_ctl_1_cfg[] = { 0x8E, 0xa0 };
 104         static u8 mt352_acq_ctl[] = { 0x53, 0x50 };
 105         static u8 mt352_agc_target[] = { 0x67, 0x20 };
 106
 107         static u8 mt352_rs_err_per[] = { 0x7c, 0x00, 0x01 };
 108         static u8 mt352_snr_select[] = { 0x79, 0x00, 0x20 };
 109
 110         static u8 mt352_input_freq_1[] = { 0x56, 0x31, 0x05 };
 111
 112         static u8 mt352_scan_ctl[] = { 0x88, 0x0f };
 113         static u8 mt352_capt_range[] = { 0x75, 0x32 };
 114
 115         mt352_write(fe, mt352_clock_config, sizeof(mt352_clock_config));
 116         mt352_write(fe, mt352_reset, sizeof(mt352_reset));
 117         msleep(1);
 118         mt352_write(fe, mt352_mclk_ratio, sizeof(mt352_mclk_ratio));
 119
 120         mt352_write(fe, mt352_agc_cfg, sizeof(mt352_agc_cfg));
 121         mt352_write(fe, mt352_adc_ctl_1_cfg, sizeof(mt352_adc_ctl_1_cfg));
 122         mt352_write(fe, mt352_acq_ctl, sizeof(mt352_acq_ctl));
 123         mt352_write(fe, mt352_agc_target, sizeof(mt352_agc_target));
 124
 125
 126         mt352_write(fe, mt352_rs_err_per, sizeof(mt352_rs_err_per));
 127         mt352_write(fe, mt352_snr_select, sizeof(mt352_snr_select));
 128
 129         mt352_write(fe, mt352_input_freq_1, sizeof(mt352_input_freq_1));
 130
 131         mt352_write(fe, mt352_scan_ctl, sizeof(mt352_scan_ctl));
 132         mt352_write(fe, mt352_capt_range, sizeof(mt352_capt_range));
 133
 134         return 0;
 135 }
 136
 137 static struct mt352_config digitv_mt352_config = {
 138         .demod_address = 0x0, /* ignored by the digitv anyway */
 139         .demod_init = digitv_mt352_demod_init,
 140         .pll_set = NULL, /* TODO */
 141 };
 142
 143 static struct nxt6000_config digitv_nxt6000_config = {
 144         .demod_address = 0x0, /* ignored by the digitv anyway */
 145         .clock_inversion = 0x0,
 146
 147         .pll_init = NULL,
 148         .pll_set = NULL,
 149 };
 150
 151 static int digitv_frontend_attach(struct dvb_usb_device *d)
 152 {
 153         if ((d->fe = mt352_attach(&digitv_mt352_config, &d->i2c_adap)) == NULL)
 154                 return 0;
 155         if ((d->fe = nxt6000_attach(&digitv_nxt6000_config, &d->i2c_adap)) == NULL) {
 156
 157                 warn("nxt6000 support is not done yet, in fact you are one of the first "
 158                                 "person who wants to use this device in Linux. Please report to "
 159                                 "linux-dvb@linuxtv.org");
 160
 161                 return 0;
 162         }
 163         return -EIO;
 164 }
 165
 166 static struct dvb_usb_rc_key digitv_rc_keys[] = {
 167         { 0x00, 0x16, KEY_POWER }, /* dummy key */
 168 };
 169
 170 /* TODO is it really the NEC protocol ? */
 171 int digitv_rc_query(struct dvb_usb_device *d, u32 *event, int *state)
 172 {
 173         u8 key[5];
 174
 175         digitv_ctrl_msg(d,USB_READ_REMOTE,0,NULL,0,&key[1],4);
 176         /* TODO state, maybe it is VV ? */
 177         if (key[1] != 0)
 178                 key[0] = 0x01; /* if something is inside the buffer, simulate key press */
 179
 180         /* call the universal NEC remote processor, to find out the key's state and event */
 181         dvb_usb_nec_rc_key_to_event(d,key,event,state);
 182         if (key[0] != 0)
 183                 deb_rc("key: %x %x %x %x %x\n",key[0],key[1],key[2],key[3],key[4]);
 184         return 0;
 185 }
 186
 187
 188 /* DVB USB Driver stuff */
 189 static struct dvb_usb_properties digitv_properties;
 190
 191 static int digitv_probe(struct usb_interface *intf,
 192                 const struct usb_device_id *id)
 193 {
 194         return dvb_usb_device_init(intf,&digitv_properties,THIS_MODULE);
 195 }
 196
 197 static struct usb_device_id digitv_table [] = {
 198                 { USB_DEVICE(USB_VID_ANCHOR, USB_PID_NEBULA_DIGITV) },
 199                 { }             /* Terminating entry */
 200 };
 201 MODULE_DEVICE_TABLE (usb, digitv_table);
 202
 203 static struct dvb_usb_properties digitv_properties = {
 204         .caps = DVB_USB_IS_AN_I2C_ADAPTER,
 205
 206         .usb_ctrl = CYPRESS_FX2,
 207         .firmware = "dvb-usb-digitv-01.fw",
 208
 209         .size_of_priv     = 0,
 210
 211         .streaming_ctrl   = NULL,
 212         .pid_filter       = NULL,
 213         .pid_filter_ctrl  = NULL,
 214         .power_ctrl       = NULL,
 215         .frontend_attach  = digitv_frontend_attach,
 216         .tuner_attach     = NULL, // digitv_tuner_attach,
 217         .read_mac_address = NULL,
 218
 219         .rc_interval      = 1000,
 220         .rc_key_map       = digitv_rc_keys,
 221         .rc_key_map_size  = ARRAY_SIZE(digitv_rc_keys),
 222         .rc_query         = digitv_rc_query,
 223
 224         .identify_state   = digitv_identify_state,
 225
 226         .i2c_algo         = &digitv_i2c_algo,
 227
 228         .generic_bulk_ctrl_endpoint = 0x01,
 229         /* parameter for the MPEG2-data transfer */
 230         .urb = {
 231                 .type = DVB_USB_BULK,
 232                 .count = 7,
 233                 .endpoint = 0x02,
 234                 .u = {
 235                         .bulk = {
 236                                 .buffersize = 4096,
 237                         }
 238                 }
 239         },
 240
 241         .num_device_descs = 2,
 242         .devices = {
 243                 {   "Nebula Electronics uDigiTV DVB-T USB2.0)",
 244                         { &digitv_table[0], NULL },
 245                         { NULL },
 246                 },
 247         }
 248 };
 249
 250 static struct usb_driver digitv_driver = {
 251         .owner          = THIS_MODULE,
 252         .name           = "Nebula Electronics uDigiTV DVB-T USB2.0 device",
 253         .probe          = digitv_probe,
 254         .disconnect = dvb_usb_device_exit,
 255         .id_table       = digitv_table,
 256 };
 257
 258 /* module stuff */
 259 static int __init digitv_module_init(void)
 260 {
 261         int result;
 262         if ((result = usb_register(&digitv_driver))) {
 263                 err("usb_register failed. Error number %d",result);
 264                 return result;
 265         }
 266
 267         return 0;
 268 }
 269
 270 static void __exit digitv_module_exit(void)
 271 {
 272         /* deregister this driver from the USB subsystem */
 273         usb_deregister(&digitv_driver);
 274 }
 275
 276 module_init (digitv_module_init);
 277 module_exit (digitv_module_exit);
 278
 279 MODULE_AUTHOR("Patrick Boettcher <patrick.boettcher@desy.de>");
 280 MODULE_DESCRIPTION("Driver for Nebula Electronics uDigiTV DVB-T USB2.0");
 281 MODULE_VERSION("1.0-alpha");
 282 MODULE_LICENSE("GPL");