summaryrefslogtreecommitdiff
path: root/drivers/media/usb/as102/as10x_cmd_cfg.c
blob: 5bc11a7141e741458c94cc8e9483d4eb73529606 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
// SPDX-License-Identifier: GPL-2.0-or-later
/*
 * Abilis Systems Single DVB-T Receiver
 * Copyright (C) 2008 Pierrick Hascoet <pierrick.hascoet@abilis.com>
 */

#include <linux/kernel.h>
#include "as102_drv.h"
#include "as10x_cmd.h"

/***************************/
/* FUNCTION DEFINITION     */
/***************************/

/**
 * as10x_cmd_get_context - Send get context command to AS10x
 * @adap:      pointer to AS10x bus adapter
 * @tag:       context tag
 * @pvalue:    pointer where to store context value read
 *
 * Return 0 on success or negative value in case of error.
 */
int as10x_cmd_get_context(struct as10x_bus_adapter_t *adap, uint16_t tag,
			  uint32_t *pvalue)
{
	int  error;
	struct as10x_cmd_t *pcmd, *prsp;

	pcmd = adap->cmd;
	prsp = adap->rsp;

	/* prepare command */
	as10x_cmd_build(pcmd, (++adap->cmd_xid),
			sizeof(pcmd->body.context.req));

	/* fill command */
	pcmd->body.context.req.proc_id = cpu_to_le16(CONTROL_PROC_CONTEXT);
	pcmd->body.context.req.tag = cpu_to_le16(tag);
	pcmd->body.context.req.type = cpu_to_le16(GET_CONTEXT_DATA);

	/* send command */
	if (adap->ops->xfer_cmd) {
		error  = adap->ops->xfer_cmd(adap,
					     (uint8_t *) pcmd,
					     sizeof(pcmd->body.context.req)
					     + HEADER_SIZE,
					     (uint8_t *) prsp,
					     sizeof(prsp->body.context.rsp)
					     + HEADER_SIZE);
	} else {
		error = AS10X_CMD_ERROR;
	}

	if (error < 0)
		goto out;

	/* parse response: context command do not follow the common response */
	/* structure -> specific handling response parse required            */
	error = as10x_context_rsp_parse(prsp, CONTROL_PROC_CONTEXT_RSP);

	if (error == 0) {
		/* Response OK -> get response data */
		*pvalue = le32_to_cpu((__force __le32)prsp->body.context.rsp.reg_val.u.value32);
		/* value returned is always a 32-bit value */
	}

out:
	return error;
}

/**
 * as10x_cmd_set_context - send set context command to AS10x
 * @adap:      pointer to AS10x bus adapter
 * @tag:       context tag
 * @value:     value to set in context
 *
 * Return 0 on success or negative value in case of error.
 */
int as10x_cmd_set_context(struct as10x_bus_adapter_t *adap, uint16_t tag,
			  uint32_t value)
{
	int error;
	struct as10x_cmd_t *pcmd, *prsp;

	pcmd = adap->cmd;
	prsp = adap->rsp;

	/* prepare command */
	as10x_cmd_build(pcmd, (++adap->cmd_xid),
			sizeof(pcmd->body.context.req));

	/* fill command */
	pcmd->body.context.req.proc_id = cpu_to_le16(CONTROL_PROC_CONTEXT);
	/* pcmd->body.context.req.reg_val.mode initialization is not required */
	pcmd->body.context.req.reg_val.u.value32 = (__force u32)cpu_to_le32(value);
	pcmd->body.context.req.tag = cpu_to_le16(tag);
	pcmd->body.context.req.type = cpu_to_le16(SET_CONTEXT_DATA);

	/* send command */
	if (adap->ops->xfer_cmd) {
		error  = adap->ops->xfer_cmd(adap,
					     (uint8_t *) pcmd,
					     sizeof(pcmd->body.context.req)
					     + HEADER_SIZE,
					     (uint8_t *) prsp,
					     sizeof(prsp->body.context.rsp)
					     + HEADER_SIZE);
	} else {
		error = AS10X_CMD_ERROR;
	}

	if (error < 0)
		goto out;

	/* parse response: context command do not follow the common response */
	/* structure -> specific handling response parse required            */
	error = as10x_context_rsp_parse(prsp, CONTROL_PROC_CONTEXT_RSP);

out:
	return error;
}

/**
 * as10x_cmd_eLNA_change_mode - send eLNA change mode command to AS10x
 * @adap:      pointer to AS10x bus adapter
 * @mode:      mode selected:
 *		- ON    : 0x0 => eLNA always ON
 *		- OFF   : 0x1 => eLNA always OFF
 *		- AUTO  : 0x2 => eLNA follow hysteresis parameters
 *				 to be ON or OFF
 *
 * Return 0 on success or negative value in case of error.
 */
int as10x_cmd_eLNA_change_mode(struct as10x_bus_adapter_t *adap, uint8_t mode)
{
	int error;
	struct as10x_cmd_t *pcmd, *prsp;

	pcmd = adap->cmd;
	prsp = adap->rsp;

	/* prepare command */
	as10x_cmd_build(pcmd, (++adap->cmd_xid),
			sizeof(pcmd->body.cfg_change_mode.req));

	/* fill command */
	pcmd->body.cfg_change_mode.req.proc_id =
		cpu_to_le16(CONTROL_PROC_ELNA_CHANGE_MODE);
	pcmd->body.cfg_change_mode.req.mode = mode;

	/* send command */
	if (adap->ops->xfer_cmd) {
		error  = adap->ops->xfer_cmd(adap, (uint8_t *) pcmd,
				sizeof(pcmd->body.cfg_change_mode.req)
				+ HEADER_SIZE, (uint8_t *) prsp,
				sizeof(prsp->body.cfg_change_mode.rsp)
				+ HEADER_SIZE);
	} else {
		error = AS10X_CMD_ERROR;
	}

	if (error < 0)
		goto out;

	/* parse response */
	error = as10x_rsp_parse(prsp, CONTROL_PROC_ELNA_CHANGE_MODE_RSP);

out:
	return error;
}

/**
 * as10x_context_rsp_parse - Parse context command response
 * @prsp:       pointer to AS10x command response buffer
 * @proc_id:    id of the command
 *
 * Since the contex command response does not follow the common
 * response, a specific parse function is required.
 * Return 0 on success or negative value in case of error.
 */
int as10x_context_rsp_parse(struct as10x_cmd_t *prsp, uint16_t proc_id)
{
	int err;

	err = prsp->body.context.rsp.error;

	if ((err == 0) &&
	    (le16_to_cpu(prsp->body.context.rsp.proc_id) == proc_id)) {
		return 0;
	}
	return AS10X_CMD_ERROR;
}