![Takashi Sakamoto](/assets/img/avatar_default.png)
OXFW970/971 may supports AV/C Stream Format Information Specification 1.1 Working Draft (Apr 2005, 1394TA). By using this command, drivers can get to know stream formations which device supports. This commit adds 'EXTENDED STREAM FORMAT INFORMATION' command. This command has two subfunctions, 'SINGLE' and 'LIST'. Drivers can use 'SINGLE' subfunction to know/set current formation of AMDTP stream, Drivers can use 'LIST' subfunction to know an available formation of AMDTP stream in a certain sampling rate. But some devices don't implement the 'LIST' subfunction. So this commit uses an assumption that 'if they don't implement it, they don't change stream formation depending on current each sampling rate'. With this assumption, this driver generates formations for such devices by: 1.getting current formation by SINGLE subfunction 2.getting supported sampling rates 3.applying current formation for all of supported sampling rates Followed commit implements a parser of this format information. Signed-off-by: Takashi Sakamoto <o-takashi@sakamocchi.jp> Acked-by: Clemens Ladisch <clemens@ladisch.de> Signed-off-by: Takashi Iwai <tiwai@suse.de>
154 lines
3.9 KiB
C
154 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) && (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) && (err < 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 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) && (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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