sound/firewire/oxfw/oxfw-command.c

   1 /*
   2  * oxfw_command.c - a part of driver for OXFW970/971 based devices
   3  *
   4  * Copyright (c) 2014 Takashi Sakamoto
   5  *
   6  * Licensed under the terms of the GNU General Public License, version 2.
   7  */
   8
   9 #include "oxfw.h"
  10
  11 int avc_stream_set_format(struct fw_unit *unit, enum avc_general_plug_dir dir,
  12                           unsigned int pid, u8 *format, unsigned int len)
  13 {
  14         u8 *buf;
  15         int err;
  16
  17         buf = kmalloc(len + 10, GFP_KERNEL);
  18         if (buf == NULL)
  19                 return -ENOMEM;
  20
  21         buf[0] = 0x00;          /* CONTROL */
  22         buf[1] = 0xff;          /* UNIT */
  23         buf[2] = 0xbf;          /* EXTENDED STREAM FORMAT INFORMATION */
  24         buf[3] = 0xc0;          /* SINGLE subfunction */
  25         buf[4] = dir;           /* Plug Direction */
  26         buf[5] = 0x00;          /* UNIT */
  27         buf[6] = 0x00;          /* PCR (Isochronous Plug) */
  28         buf[7] = 0xff & pid;    /* Plug ID */
  29         buf[8] = 0xff;          /* Padding */
  30         buf[9] = 0xff;          /* Support status in response */
  31         memcpy(buf + 10, format, len);
  32
  33         /* do transaction and check buf[1-8] are the same against command */
  34         err = fcp_avc_transaction(unit, buf, len + 10, buf, len + 10,
  35                                   BIT(1) | BIT(2) | BIT(3) | BIT(4) | BIT(5) |
  36                                   BIT(6) | BIT(7) | BIT(8));
  37         if (err < 0)
  38                 ;
  39         else if (err < len + 10)
  40                 err = -EIO;
  41         else if (buf[0] == 0x08) /* NOT IMPLEMENTED */
  42                 err = -ENOSYS;
  43         else if (buf[0] == 0x0a) /* REJECTED */
  44                 err = -EINVAL;
  45         else
  46                 err = 0;
  47
  48         kfree(buf);
  49
  50         return err;
  51 }
  52
  53 int avc_stream_get_format(struct fw_unit *unit,
  54                           enum avc_general_plug_dir dir, unsigned int pid,
  55                           u8 *buf, unsigned int *len, unsigned int eid)
  56 {
  57         unsigned int subfunc;
  58         int err;
  59
  60         if (eid == 0xff)
  61                 subfunc = 0xc0; /* SINGLE */
  62         else
  63                 subfunc = 0xc1; /* LIST */
  64
  65         buf[0] = 0x01;          /* STATUS */
  66         buf[1] = 0xff;          /* UNIT */
  67         buf[2] = 0xbf;          /* EXTENDED STREAM FORMAT INFORMATION */
  68         buf[3] = subfunc;       /* SINGLE or LIST */
  69         buf[4] = dir;           /* Plug Direction */
  70         buf[5] = 0x00;          /* Unit */
  71         buf[6] = 0x00;          /* PCR (Isochronous Plug) */
  72         buf[7] = 0xff & pid;    /* Plug ID */
  73         buf[8] = 0xff;          /* Padding */
  74         buf[9] = 0xff;          /* support status in response */
  75         buf[10] = 0xff & eid;   /* entry ID for LIST subfunction */
  76         buf[11] = 0xff;         /* padding */
  77
  78         /* do transaction and check buf[1-7] are the same against command */
  79         err = fcp_avc_transaction(unit, buf, 12, buf, *len,
  80                                   BIT(1) | BIT(2) | BIT(3) | BIT(4) | BIT(5) |
  81                                   BIT(6) | BIT(7));
  82         if (err < 0)
  83                 ;
  84         else if (err < 12)
  85                 err = -EIO;
  86         else if (buf[0] == 0x08)        /* NOT IMPLEMENTED */
  87                 err = -ENOSYS;
  88         else if (buf[0] == 0x0a)        /* REJECTED */
  89                 err = -EINVAL;
  90         else if (buf[0] == 0x0b)        /* IN TRANSITION */
  91                 err = -EAGAIN;
  92         /* LIST subfunction has entry ID */
  93         else if ((subfunc == 0xc1) && (buf[10] != eid))
  94                 err = -EIO;
  95         if (err < 0)
  96                 goto end;
  97
  98         /* keep just stream format information */
  99         if (subfunc == 0xc0) {
 100                 memmove(buf, buf + 10, err - 10);
 101                 *len = err - 10;
 102         } else {
 103                 memmove(buf, buf + 11, err - 11);
 104                 *len = err - 11;
 105         }
 106
 107         err = 0;
 108 end:
 109         return err;
 110 }
 111
 112 int avc_general_inquiry_sig_fmt(struct fw_unit *unit, unsigned int rate,
 113                                 enum avc_general_plug_dir dir,
 114                                 unsigned short pid)
 115 {
 116         unsigned int sfc;
 117         u8 *buf;
 118         int err;
 119
 120         for (sfc = 0; sfc < CIP_SFC_COUNT; sfc++) {
 121                 if (amdtp_rate_table[sfc] == rate)
 122                         break;
 123         }
 124         if (sfc == CIP_SFC_COUNT)
 125                 return -EINVAL;
 126
 127         buf = kzalloc(8, GFP_KERNEL);
 128         if (buf == NULL)
 129                 return -ENOMEM;
 130
 131         buf[0] = 0x02;          /* SPECIFIC INQUIRY */
 132         buf[1] = 0xff;          /* UNIT */
 133         if (dir == AVC_GENERAL_PLUG_DIR_IN)
 134                 buf[2] = 0x19;  /* INPUT PLUG SIGNAL FORMAT */
 135         else
 136                 buf[2] = 0x18;  /* OUTPUT PLUG SIGNAL FORMAT */
 137         buf[3] = 0xff & pid;    /* plug id */
 138         buf[4] = 0x90;          /* EOH_1, Form_1, FMT. AM824 */
 139         buf[5] = 0x07 & sfc;    /* FDF-hi. AM824, frequency */
 140         buf[6] = 0xff;          /* FDF-mid. AM824, SYT hi (not used) */
 141         buf[7] = 0xff;          /* FDF-low. AM824, SYT lo (not used) */
 142
 143         /* do transaction and check buf[1-5] are the same against command */
 144         err = fcp_avc_transaction(unit, buf, 8, buf, 8,
 145                                   BIT(1) | BIT(2) | BIT(3) | BIT(4) | BIT(5));
 146         if (err < 0)
 147                 ;
 148         else if (err < 8)
 149                 err = -EIO;
 150         else if (buf[0] == 0x08)        /* NOT IMPLEMENTED */
 151                 err = -ENOSYS;
 152         if (err < 0)
 153                 goto end;
 154
 155         err = 0;
 156 end:
 157         kfree(buf);
 158         return err;
 159 }