drivers/media/dvb/dvb-usb/dib0700_core.c

   1 /* Linux driver for devices based on the DiBcom DiB0700 USB bridge
   2  *
   3  *      This program is free software; you can redistribute it and/or modify it
   4  *      under the terms of the GNU General Public License as published by the Free
   5  *      Software Foundation, version 2.
   6  *
   7  *  Copyright (C) 2005-6 DiBcom, SA
   8  */
   9 #include "dib0700.h"
  10
  11 /* debug */
  12 int dvb_usb_dib0700_debug;
  13 module_param_named(debug,dvb_usb_dib0700_debug, int, 0644);
  14 MODULE_PARM_DESC(debug, "set debugging level (1=info,2=fw,4=fwdata,8=data (or-able))." DVB_USB_DEBUG_STATUS);
  15
  16 int dvb_usb_dib0700_ir_proto = 1;
  17 module_param(dvb_usb_dib0700_ir_proto, int, 0644);
  18 MODULE_PARM_DESC(dvb_usb_dib0700_ir_proto, "set ir protocol (0=NEC, 1=RC5 (default), 2=RC6).");
  19
  20 DVB_DEFINE_MOD_OPT_ADAPTER_NR(adapter_nr);
  21
  22 /* expecting rx buffer: request data[0] data[1] ... data[2] */
  23 static int dib0700_ctrl_wr(struct dvb_usb_device *d, u8 *tx, u8 txlen)
  24 {
  25         int status;
  26
  27         deb_data(">>> ");
  28         debug_dump(tx,txlen,deb_data);
  29
  30         status = usb_control_msg(d->udev, usb_sndctrlpipe(d->udev,0),
  31                 tx[0], USB_TYPE_VENDOR | USB_DIR_OUT, 0, 0, tx, txlen,
  32                 USB_CTRL_GET_TIMEOUT);
  33
  34         if (status != txlen)
  35                 deb_data("ep 0 write error (status = %d, len: %d)\n",status,txlen);
  36
  37         return status < 0 ? status : 0;
  38 }
  39
  40 /* expecting tx buffer: request data[0] ... data[n] (n <= 4) */
  41 int dib0700_ctrl_rd(struct dvb_usb_device *d, u8 *tx, u8 txlen, u8 *rx, u8 rxlen)
  42 {
  43         u16 index, value;
  44         int status;
  45
  46         if (txlen < 2) {
  47                 err("tx buffer length is smaller than 2. Makes no sense.");
  48                 return -EINVAL;
  49         }
  50         if (txlen > 4) {
  51                 err("tx buffer length is larger than 4. Not supported.");
  52                 return -EINVAL;
  53         }
  54
  55         deb_data(">>> ");
  56         debug_dump(tx,txlen,deb_data);
  57
  58         value = ((txlen - 2) << 8) | tx[1];
  59         index = 0;
  60         if (txlen > 2)
  61                 index |= (tx[2] << 8);
  62         if (txlen > 3)
  63                 index |= tx[3];
  64
  65         status = usb_control_msg(d->udev, usb_rcvctrlpipe(d->udev,0), tx[0],
  66                         USB_TYPE_VENDOR | USB_DIR_IN, value, index, rx, rxlen,
  67                         USB_CTRL_GET_TIMEOUT);
  68
  69         if (status < 0)
  70                 deb_info("ep 0 read error (status = %d)\n",status);
  71
  72         deb_data("<<< ");
  73         debug_dump(rx,rxlen,deb_data);
  74
  75         return status; /* length in case of success */
  76 }
  77
  78 int dib0700_set_gpio(struct dvb_usb_device *d, enum dib07x0_gpios gpio, u8 gpio_dir, u8 gpio_val)
  79 {
  80         u8 buf[3] = { REQUEST_SET_GPIO, gpio, ((gpio_dir & 0x01) << 7) | ((gpio_val & 0x01) << 6) };
  81         return dib0700_ctrl_wr(d,buf,3);
  82 }
  83
  84 /*
  85  * I2C master xfer function
  86  */
  87 static int dib0700_i2c_xfer(struct i2c_adapter *adap,struct i2c_msg *msg,int num)
  88 {
  89         struct dvb_usb_device *d = i2c_get_adapdata(adap);
  90         int i,len;
  91         u8 buf[255];
  92
  93         if (mutex_lock_interruptible(&d->i2c_mutex) < 0)
  94                 return -EAGAIN;
  95
  96         for (i = 0; i < num; i++) {
  97                 /* fill in the address */
  98                 buf[1] = (msg[i].addr << 1);
  99                 /* fill the buffer */
 100                 memcpy(&buf[2], msg[i].buf, msg[i].len);
 101
 102                 /* write/read request */
 103                 if (i+1 < num && (msg[i+1].flags & I2C_M_RD)) {
 104                         buf[0] = REQUEST_I2C_READ;
 105                         buf[1] |= 1;
 106
 107                         /* special thing in the current firmware: when length is zero the read-failed */
 108                         if ((len = dib0700_ctrl_rd(d, buf, msg[i].len + 2, msg[i+1].buf, msg[i+1].len)) <= 0) {
 109                                 deb_info("I2C read failed on address %x\n", msg[i].addr);
 110                                 break;
 111                         }
 112
 113                         msg[i+1].len = len;
 114
 115                         i++;
 116                 } else {
 117                         buf[0] = REQUEST_I2C_WRITE;
 118                         if (dib0700_ctrl_wr(d, buf, msg[i].len + 2) < 0)
 119                                 break;
 120                 }
 121         }
 122
 123         mutex_unlock(&d->i2c_mutex);
 124         return i;
 125 }
 126
 127 static u32 dib0700_i2c_func(struct i2c_adapter *adapter)
 128 {
 129         return I2C_FUNC_I2C;
 130 }
 131
 132 struct i2c_algorithm dib0700_i2c_algo = {
 133         .master_xfer   = dib0700_i2c_xfer,
 134         .functionality = dib0700_i2c_func,
 135 };
 136
 137 int dib0700_identify_state(struct usb_device *udev, struct dvb_usb_device_properties *props,
 138                         struct dvb_usb_device_description **desc, int *cold)
 139 {
 140         u8 b[16];
 141         s16 ret = usb_control_msg(udev, usb_rcvctrlpipe(udev,0),
 142                 REQUEST_GET_VERSION, USB_TYPE_VENDOR | USB_DIR_IN, 0, 0, b, 16, USB_CTRL_GET_TIMEOUT);
 143
 144         deb_info("FW GET_VERSION length: %d\n",ret);
 145
 146         *cold = ret <= 0;
 147
 148         deb_info("cold: %d\n", *cold);
 149         return 0;
 150 }
 151
 152 static int dib0700_set_clock(struct dvb_usb_device *d, u8 en_pll,
 153         u8 pll_src, u8 pll_range, u8 clock_gpio3, u16 pll_prediv,
 154         u16 pll_loopdiv, u16 free_div, u16 dsuScaler)
 155 {
 156         u8 b[10];
 157         b[0] = REQUEST_SET_CLOCK;
 158         b[1] = (en_pll << 7) | (pll_src << 6) | (pll_range << 5) | (clock_gpio3 << 4);
 159         b[2] = (pll_prediv >> 8)  & 0xff; // MSB
 160         b[3] =  pll_prediv        & 0xff; // LSB
 161         b[4] = (pll_loopdiv >> 8) & 0xff; // MSB
 162         b[5] =  pll_loopdiv       & 0xff; // LSB
 163         b[6] = (free_div >> 8)    & 0xff; // MSB
 164         b[7] =  free_div          & 0xff; // LSB
 165         b[8] = (dsuScaler >> 8)   & 0xff; // MSB
 166         b[9] =  dsuScaler         & 0xff; // LSB
 167
 168         return dib0700_ctrl_wr(d, b, 10);
 169 }
 170
 171 int dib0700_ctrl_clock(struct dvb_usb_device *d, u32 clk_MHz, u8 clock_out_gp3)
 172 {
 173         switch (clk_MHz) {
 174                 case 72: dib0700_set_clock(d, 1, 0, 1, clock_out_gp3, 2, 24, 0, 0x4c); break;
 175                 default: return -EINVAL;
 176         }
 177         return 0;
 178 }
 179
 180 static int dib0700_jumpram(struct usb_device *udev, u32 address)
 181 {
 182         int ret, actlen;
 183         u8 buf[8] = { REQUEST_JUMPRAM, 0, 0, 0,
 184                 (address >> 24) & 0xff,
 185                 (address >> 16) & 0xff,
 186                 (address >> 8)  & 0xff,
 187                  address        & 0xff };
 188
 189         if ((ret = usb_bulk_msg(udev, usb_sndbulkpipe(udev, 0x01),buf,8,&actlen,1000)) < 0) {
 190                 deb_fw("jumpram to 0x%x failed\n",address);
 191                 return ret;
 192         }
 193         if (actlen != 8) {
 194                 deb_fw("jumpram to 0x%x failed\n",address);
 195                 return -EIO;
 196         }
 197         return 0;
 198 }
 199
 200 int dib0700_download_firmware(struct usb_device *udev, const struct firmware *fw)
 201 {
 202         struct hexline hx;
 203         int pos = 0, ret, act_len;
 204
 205         u8 buf[260];
 206
 207         while ((ret = dvb_usb_get_hexline(fw, &hx, &pos)) > 0) {
 208                 deb_fwdata("writing to address 0x%08x (buffer: 0x%02x %02x)\n",hx.addr, hx.len, hx.chk);
 209
 210                 buf[0] = hx.len;
 211                 buf[1] = (hx.addr >> 8) & 0xff;
 212                 buf[2] =  hx.addr       & 0xff;
 213                 buf[3] = hx.type;
 214                 memcpy(&buf[4],hx.data,hx.len);
 215                 buf[4+hx.len] = hx.chk;
 216
 217                 ret = usb_bulk_msg(udev,
 218                         usb_sndbulkpipe(udev, 0x01),
 219                         buf,
 220                         hx.len + 5,
 221                         &act_len,
 222                         1000);
 223
 224                 if (ret < 0) {
 225                         err("firmware download failed at %d with %d",pos,ret);
 226                         return ret;
 227                 }
 228         }
 229
 230         if (ret == 0) {
 231                 /* start the firmware */
 232                 if ((ret = dib0700_jumpram(udev, 0x70000000)) == 0) {
 233                         info("firmware started successfully.");
 234                         msleep(500);
 235                 }
 236         } else
 237                 ret = -EIO;
 238
 239         return ret;
 240 }
 241
 242 int dib0700_streaming_ctrl(struct dvb_usb_adapter *adap, int onoff)
 243 {
 244         struct dib0700_state *st = adap->dev->priv;
 245         u8 b[4];
 246
 247         b[0] = REQUEST_ENABLE_VIDEO;
 248         b[1] = (onoff << 4) | 0x00; /* this bit gives a kind of command, rather than enabling something or not */
 249         b[2] = (0x01 << 4); /* Master mode */
 250         b[3] = 0x00;
 251
 252         deb_info("modifying (%d) streaming state for %d\n", onoff, adap->id);
 253
 254         if (onoff)
 255                 st->channel_state |=   1 << adap->id;
 256         else
 257                 st->channel_state &= ~(1 << adap->id);
 258
 259         b[2] |= st->channel_state;
 260
 261         deb_info("data for streaming: %x %x\n",b[1],b[2]);
 262
 263         return dib0700_ctrl_wr(adap->dev, b, 4);
 264 }
 265
 266 int dib0700_rc_setup(struct dvb_usb_device *d)
 267 {
 268         u8 rc_setup[3] = {REQUEST_SET_RC, dvb_usb_dib0700_ir_proto, 0};
 269         int i = dib0700_ctrl_wr(d, rc_setup, 3);
 270         if (i<0) {
 271                 err("ir protocol setup failed");
 272                 return -1;
 273         }
 274         return 0;
 275 }
 276
 277 static int dib0700_probe(struct usb_interface *intf,
 278                 const struct usb_device_id *id)
 279 {
 280         int i;
 281         struct dvb_usb_device *dev;
 282
 283         for (i = 0; i < dib0700_device_count; i++)
 284                 if (dvb_usb_device_init(intf, &dib0700_devices[i], THIS_MODULE,
 285                                         &dev, adapter_nr) == 0)
 286                 {
 287                         dib0700_rc_setup(dev);
 288                         return 0;
 289                 }
 290
 291         return -ENODEV;
 292 }
 293
 294 static struct usb_driver dib0700_driver = {
 295         .name       = "dvb_usb_dib0700",
 296         .probe      = dib0700_probe,
 297         .disconnect = dvb_usb_device_exit,
 298         .id_table   = dib0700_usb_id_table,
 299 };
 300
 301 /* module stuff */
 302 static int __init dib0700_module_init(void)
 303 {
 304         int result;
 305         info("loaded with support for %d different device-types", dib0700_device_count);
 306         if ((result = usb_register(&dib0700_driver))) {
 307                 err("usb_register failed. Error number %d",result);
 308                 return result;
 309         }
 310
 311         return 0;
 312 }
 313
 314 static void __exit dib0700_module_exit(void)
 315 {
 316         /* deregister this driver from the USB subsystem */
 317         usb_deregister(&dib0700_driver);
 318 }
 319
 320 module_init (dib0700_module_init);
 321 module_exit (dib0700_module_exit);
 322
 323 MODULE_AUTHOR("Patrick Boettcher <pboettcher@dibcom.fr>");
 324 MODULE_DESCRIPTION("Driver for devices based on DiBcom DiB0700 - USB bridge");
 325 MODULE_VERSION("1.0");
 326 MODULE_LICENSE("GPL");