sound/firewire/oxfw/oxfw-command.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  * oxfw_command.c - a part of driver for OXFW970/971 based devices
   4  *
   5  * Copyright (c) 2014 Takashi Sakamoto
   6  */
   7
   8 #include "oxfw.h"
   9
  10 int avc_stream_set_format(struct fw_unit *unit, enum avc_general_plug_dir dir,
  11                           unsigned int pid, u8 *format, unsigned int len)
  12 {
  13         u8 *buf;
  14         int err;
  15
  16         buf = kmalloc(len + 10, GFP_KERNEL);
  17         if (buf == NULL)
  18                 return -ENOMEM;
  19
  20         buf[0] = 0x00;          /* CONTROL */
  21         buf[1] = 0xff;          /* UNIT */
  22         buf[2] = 0xbf;          /* EXTENDED STREAM FORMAT INFORMATION */
  23         buf[3] = 0xc0;          /* SINGLE subfunction */
  24         buf[4] = dir;           /* Plug Direction */
  25         buf[5] = 0x00;          /* UNIT */
  26         buf[6] = 0x00;          /* PCR (Isochronous Plug) */
  27         buf[7] = 0xff & pid;    /* Plug ID */
  28         buf[8] = 0xff;          /* Padding */
  29         buf[9] = 0xff;          /* Support status in response */
  30         memcpy(buf + 10, format, len);
  31
  32         /* do transaction and check buf[1-8] are the same against command */
  33         err = fcp_avc_transaction(unit, buf, len + 10, buf, len + 10,
  34                                   BIT(1) | BIT(2) | BIT(3) | BIT(4) | BIT(5) |
  35                                   BIT(6) | BIT(7) | BIT(8));
  36         if (err < 0)
  37                 ;
  38         else if (err < len + 10)
  39                 err = -EIO;
  40         else if (buf[0] == 0x08) /* NOT IMPLEMENTED */
  41                 err = -ENXIO;
  42         else if (buf[0] == 0x0a) /* REJECTED */
  43                 err = -EINVAL;
  44         else
  45                 err = 0;
  46
  47         kfree(buf);
  48
  49         return err;
  50 }
  51
  52 int avc_stream_get_format(struct fw_unit *unit,
  53                           enum avc_general_plug_dir dir, unsigned int pid,
  54                           u8 *buf, unsigned int *len, unsigned int eid)
  55 {
  56         unsigned int subfunc;
  57         int err;
  58
  59         if (eid == 0xff)
  60                 subfunc = 0xc0; /* SINGLE */
  61         else
  62                 subfunc = 0xc1; /* LIST */
  63
  64         buf[0] = 0x01;          /* STATUS */
  65         buf[1] = 0xff;          /* UNIT */
  66         buf[2] = 0xbf;          /* EXTENDED STREAM FORMAT INFORMATION */
  67         buf[3] = subfunc;       /* SINGLE or LIST */
  68         buf[4] = dir;           /* Plug Direction */
  69         buf[5] = 0x00;          /* Unit */
  70         buf[6] = 0x00;          /* PCR (Isochronous Plug) */
  71         buf[7] = 0xff & pid;    /* Plug ID */
  72         buf[8] = 0xff;          /* Padding */
  73         buf[9] = 0xff;          /* support status in response */
  74         buf[10] = 0xff & eid;   /* entry ID for LIST subfunction */
  75         buf[11] = 0xff;         /* padding */
  76
  77         /* do transaction and check buf[1-7] are the same against command */
  78         err = fcp_avc_transaction(unit, buf, 12, buf, *len,
  79                                   BIT(1) | BIT(2) | BIT(3) | BIT(4) | BIT(5) |
  80                                   BIT(6) | BIT(7));
  81         if (err < 0)
  82                 ;
  83         else if (err < 12)
  84                 err = -EIO;
  85         else if (buf[0] == 0x08)        /* NOT IMPLEMENTED */
  86                 err = -ENXIO;
  87         else if (buf[0] == 0x0a)        /* REJECTED */
  88                 err = -EINVAL;
  89         else if (buf[0] == 0x0b)        /* IN TRANSITION */
  90                 err = -EAGAIN;
  91         /* LIST subfunction has entry ID */
  92         else if ((subfunc == 0xc1) && (buf[10] != eid))
  93                 err = -EIO;
  94         if (err < 0)
  95                 goto end;
  96
  97         /* keep just stream format information */
  98         if (subfunc == 0xc0) {
  99                 memmove(buf, buf + 10, err - 10);
 100                 *len = err - 10;
 101         } else {
 102                 memmove(buf, buf + 11, err - 11);
 103                 *len = err - 11;
 104         }
 105
 106         err = 0;
 107 end:
 108         return err;
 109 }
 110
 111 int avc_general_inquiry_sig_fmt(struct fw_unit *unit, unsigned int rate,
 112                                 enum avc_general_plug_dir dir,
 113                                 unsigned short pid)
 114 {
 115         unsigned int sfc;
 116         u8 *buf;
 117         int err;
 118
 119         for (sfc = 0; sfc < CIP_SFC_COUNT; sfc++) {
 120                 if (amdtp_rate_table[sfc] == rate)
 121                         break;
 122         }
 123         if (sfc == CIP_SFC_COUNT)
 124                 return -EINVAL;
 125
 126         buf = kzalloc(8, GFP_KERNEL);
 127         if (buf == NULL)
 128                 return -ENOMEM;
 129
 130         buf[0] = 0x02;          /* SPECIFIC INQUIRY */
 131         buf[1] = 0xff;          /* UNIT */
 132         if (dir == AVC_GENERAL_PLUG_DIR_IN)
 133                 buf[2] = 0x19;  /* INPUT PLUG SIGNAL FORMAT */
 134         else
 135                 buf[2] = 0x18;  /* OUTPUT PLUG SIGNAL FORMAT */
 136         buf[3] = 0xff & pid;    /* plug id */
 137         buf[4] = 0x90;          /* EOH_1, Form_1, FMT. AM824 */
 138         buf[5] = 0x07 & sfc;    /* FDF-hi. AM824, frequency */
 139         buf[6] = 0xff;          /* FDF-mid. AM824, SYT hi (not used) */
 140         buf[7] = 0xff;          /* FDF-low. AM824, SYT lo (not used) */
 141
 142         /* do transaction and check buf[1-5] are the same against command */
 143         err = fcp_avc_transaction(unit, buf, 8, buf, 8,
 144                                   BIT(1) | BIT(2) | BIT(3) | BIT(4) | BIT(5));
 145         if (err < 0)
 146                 ;
 147         else if (err < 8)
 148                 err = -EIO;
 149         else if (buf[0] == 0x08)        /* NOT IMPLEMENTED */
 150                 err = -ENXIO;
 151         if (err < 0)
 152                 goto end;
 153
 154         err = 0;
 155 end:
 156         kfree(buf);
 157         return err;
 158 }