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 }
159