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