160 lines
3.9 KiB
C
160 lines
3.9 KiB
C
/*
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* oxfw_command.c - a part of driver for OXFW970/971 based devices
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*
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* Copyright (c) 2014 Takashi Sakamoto
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*
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* Licensed under the terms of the GNU General Public License, version 2.
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*/
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#include "oxfw.h"
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int avc_stream_set_format(struct fw_unit *unit, enum avc_general_plug_dir dir,
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unsigned int pid, u8 *format, unsigned int len)
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{
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u8 *buf;
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int err;
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buf = kmalloc(len + 10, GFP_KERNEL);
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if (buf == NULL)
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return -ENOMEM;
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buf[0] = 0x00; /* CONTROL */
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buf[1] = 0xff; /* UNIT */
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buf[2] = 0xbf; /* EXTENDED STREAM FORMAT INFORMATION */
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buf[3] = 0xc0; /* SINGLE subfunction */
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buf[4] = dir; /* Plug Direction */
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buf[5] = 0x00; /* UNIT */
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buf[6] = 0x00; /* PCR (Isochronous Plug) */
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buf[7] = 0xff & pid; /* Plug ID */
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buf[8] = 0xff; /* Padding */
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buf[9] = 0xff; /* Support status in response */
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memcpy(buf + 10, format, len);
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/* do transaction and check buf[1-8] are the same against command */
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err = fcp_avc_transaction(unit, buf, len + 10, buf, len + 10,
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BIT(1) | BIT(2) | BIT(3) | BIT(4) | BIT(5) |
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BIT(6) | BIT(7) | BIT(8));
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if (err < 0)
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;
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else if (err < len + 10)
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err = -EIO;
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else if (buf[0] == 0x08) /* NOT IMPLEMENTED */
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err = -ENOSYS;
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else if (buf[0] == 0x0a) /* REJECTED */
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err = -EINVAL;
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else
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err = 0;
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kfree(buf);
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return err;
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}
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int avc_stream_get_format(struct fw_unit *unit,
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enum avc_general_plug_dir dir, unsigned int pid,
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u8 *buf, unsigned int *len, unsigned int eid)
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{
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unsigned int subfunc;
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int err;
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if (eid == 0xff)
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subfunc = 0xc0; /* SINGLE */
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else
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subfunc = 0xc1; /* LIST */
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buf[0] = 0x01; /* STATUS */
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buf[1] = 0xff; /* UNIT */
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buf[2] = 0xbf; /* EXTENDED STREAM FORMAT INFORMATION */
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buf[3] = subfunc; /* SINGLE or LIST */
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buf[4] = dir; /* Plug Direction */
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buf[5] = 0x00; /* Unit */
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buf[6] = 0x00; /* PCR (Isochronous Plug) */
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buf[7] = 0xff & pid; /* Plug ID */
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buf[8] = 0xff; /* Padding */
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buf[9] = 0xff; /* support status in response */
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buf[10] = 0xff & eid; /* entry ID for LIST subfunction */
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buf[11] = 0xff; /* padding */
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/* do transaction and check buf[1-7] are the same against command */
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err = fcp_avc_transaction(unit, buf, 12, buf, *len,
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BIT(1) | BIT(2) | BIT(3) | BIT(4) | BIT(5) |
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BIT(6) | BIT(7));
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if (err < 0)
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;
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else if (err < 12)
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err = -EIO;
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else if (buf[0] == 0x08) /* NOT IMPLEMENTED */
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err = -ENOSYS;
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else if (buf[0] == 0x0a) /* REJECTED */
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err = -EINVAL;
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else if (buf[0] == 0x0b) /* IN TRANSITION */
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err = -EAGAIN;
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/* LIST subfunction has entry ID */
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else if ((subfunc == 0xc1) && (buf[10] != eid))
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err = -EIO;
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if (err < 0)
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goto end;
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/* keep just stream format information */
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if (subfunc == 0xc0) {
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memmove(buf, buf + 10, err - 10);
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*len = err - 10;
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} else {
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memmove(buf, buf + 11, err - 11);
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*len = err - 11;
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}
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err = 0;
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end:
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return err;
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}
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int avc_general_inquiry_sig_fmt(struct fw_unit *unit, unsigned int rate,
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enum avc_general_plug_dir dir,
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unsigned short pid)
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{
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unsigned int sfc;
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u8 *buf;
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int err;
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for (sfc = 0; sfc < CIP_SFC_COUNT; sfc++) {
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if (amdtp_rate_table[sfc] == rate)
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break;
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}
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if (sfc == CIP_SFC_COUNT)
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return -EINVAL;
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buf = kzalloc(8, GFP_KERNEL);
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if (buf == NULL)
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return -ENOMEM;
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buf[0] = 0x02; /* SPECIFIC INQUIRY */
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buf[1] = 0xff; /* UNIT */
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if (dir == AVC_GENERAL_PLUG_DIR_IN)
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buf[2] = 0x19; /* INPUT PLUG SIGNAL FORMAT */
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else
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buf[2] = 0x18; /* OUTPUT PLUG SIGNAL FORMAT */
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buf[3] = 0xff & pid; /* plug id */
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buf[4] = 0x90; /* EOH_1, Form_1, FMT. AM824 */
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buf[5] = 0x07 & sfc; /* FDF-hi. AM824, frequency */
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buf[6] = 0xff; /* FDF-mid. AM824, SYT hi (not used) */
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buf[7] = 0xff; /* FDF-low. AM824, SYT lo (not used) */
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/* do transaction and check buf[1-5] are the same against command */
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err = fcp_avc_transaction(unit, buf, 8, buf, 8,
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BIT(1) | BIT(2) | BIT(3) | BIT(4) | BIT(5));
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if (err < 0)
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;
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else if (err < 8)
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err = -EIO;
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else if (buf[0] == 0x08) /* NOT IMPLEMENTED */
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err = -ENOSYS;
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if (err < 0)
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goto end;
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err = 0;
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end:
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kfree(buf);
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return err;
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}
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