cregit-Linux how code gets into the kernel

Release 4.7 sound/firewire/oxfw/oxfw-command.c

/*
 * oxfw_command.c - a part of driver for OXFW970/971 based devices
 *
 * Copyright (c) 2014 Takashi Sakamoto
 *
 * Licensed under the terms of the GNU General Public License, version 2.
 */

#include "oxfw.h"


int avc_stream_set_format(struct fw_unit *unit, enum avc_general_plug_dir dir, unsigned int pid, u8 *format, unsigned int len) { u8 *buf; int err; buf = kmalloc(len + 10, GFP_KERNEL); if (buf == NULL) return -ENOMEM; buf[0] = 0x00; /* CONTROL */ buf[1] = 0xff; /* UNIT */ buf[2] = 0xbf; /* EXTENDED STREAM FORMAT INFORMATION */ buf[3] = 0xc0; /* SINGLE subfunction */ buf[4] = dir; /* Plug Direction */ buf[5] = 0x00; /* UNIT */ buf[6] = 0x00; /* PCR (Isochronous Plug) */ buf[7] = 0xff & pid; /* Plug ID */ buf[8] = 0xff; /* Padding */ buf[9] = 0xff; /* Support status in response */ memcpy(buf + 10, format, len); /* do transaction and check buf[1-8] are the same against command */ err = fcp_avc_transaction(unit, buf, len + 10, buf, len + 10, BIT(1) | BIT(2) | BIT(3) | BIT(4) | BIT(5) | BIT(6) | BIT(7) | BIT(8)); if ((err > 0) && (err < len + 10)) err = -EIO; else if (buf[0] == 0x08) /* NOT IMPLEMENTED */ err = -ENOSYS; else if (buf[0] == 0x0a) /* REJECTED */ err = -EINVAL; else err = 0; kfree(buf); return err; }

Contributors

PersonTokensPropCommitsCommitProp
takashi sakamototakashi sakamoto273100.00%1100.00%
Total273100.00%1100.00%


int avc_stream_get_format(struct fw_unit *unit, enum avc_general_plug_dir dir, unsigned int pid, u8 *buf, unsigned int *len, unsigned int eid) { unsigned int subfunc; int err; if (eid == 0xff) subfunc = 0xc0; /* SINGLE */ else subfunc = 0xc1; /* LIST */ buf[0] = 0x01; /* STATUS */ buf[1] = 0xff; /* UNIT */ buf[2] = 0xbf; /* EXTENDED STREAM FORMAT INFORMATION */ buf[3] = subfunc; /* SINGLE or LIST */ buf[4] = dir; /* Plug Direction */ buf[5] = 0x00; /* Unit */ buf[6] = 0x00; /* PCR (Isochronous Plug) */ buf[7] = 0xff & pid; /* Plug ID */ buf[8] = 0xff; /* Padding */ buf[9] = 0xff; /* support status in response */ buf[10] = 0xff & eid; /* entry ID for LIST subfunction */ buf[11] = 0xff; /* padding */ /* do transaction and check buf[1-7] are the same against command */ err = fcp_avc_transaction(unit, buf, 12, buf, *len, BIT(1) | BIT(2) | BIT(3) | BIT(4) | BIT(5) | BIT(6) | BIT(7)); if ((err > 0) && (err < 10)) err = -EIO; else if (buf[0] == 0x08) /* NOT IMPLEMENTED */ err = -ENOSYS; else if (buf[0] == 0x0a) /* REJECTED */ err = -EINVAL; else if (buf[0] == 0x0b) /* IN TRANSITION */ err = -EAGAIN; /* LIST subfunction has entry ID */ else if ((subfunc == 0xc1) && (buf[10] != eid)) err = -EIO; if (err < 0) goto end; /* keep just stream format information */ if (subfunc == 0xc0) { memmove(buf, buf + 10, err - 10); *len = err - 10; } else { memmove(buf, buf + 11, err - 11); *len = err - 11; } err = 0; end: return err; }

Contributors

PersonTokensPropCommitsCommitProp
takashi sakamototakashi sakamoto368100.00%1100.00%
Total368100.00%1100.00%


int avc_general_inquiry_sig_fmt(struct fw_unit *unit, unsigned int rate, enum avc_general_plug_dir dir, unsigned short pid) { unsigned int sfc; u8 *buf; int err; for (sfc = 0; sfc < CIP_SFC_COUNT; sfc++) { if (amdtp_rate_table[sfc] == rate) break; } if (sfc == CIP_SFC_COUNT) return -EINVAL; buf = kzalloc(8, GFP_KERNEL); if (buf == NULL) return -ENOMEM; buf[0] = 0x02; /* SPECIFIC INQUIRY */ buf[1] = 0xff; /* UNIT */ if (dir == AVC_GENERAL_PLUG_DIR_IN) buf[2] = 0x19; /* INPUT PLUG SIGNAL FORMAT */ else buf[2] = 0x18; /* OUTPUT PLUG SIGNAL FORMAT */ buf[3] = 0xff & pid; /* plug id */ buf[4] = 0x90; /* EOH_1, Form_1, FMT. AM824 */ buf[5] = 0x07 & sfc; /* FDF-hi. AM824, frequency */ buf[6] = 0xff; /* FDF-mid. AM824, SYT hi (not used) */ buf[7] = 0xff; /* FDF-low. AM824, SYT lo (not used) */ /* do transaction and check buf[1-5] are the same against command */ err = fcp_avc_transaction(unit, buf, 8, buf, 8, BIT(1) | BIT(2) | BIT(3) | BIT(4) | BIT(5)); if ((err > 0) && (err < 8)) err = -EIO; else if (buf[0] == 0x08) /* NOT IMPLEMENTED */ err = -ENOSYS; if (err < 0) goto end; err = 0; end: kfree(buf); return err; }

Contributors

PersonTokensPropCommitsCommitProp
takashi sakamototakashi sakamoto269100.00%1100.00%
Total269100.00%1100.00%


Overall Contributors

PersonTokensPropCommitsCommitProp
takashi sakamototakashi sakamoto914100.00%1100.00%
Total914100.00%1100.00%
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