summaryrefslogtreecommitdiffstats
path: root/drivers/media/video/cx23885/cx23885-ioctl.c
blob: 44812ca788992d6a511e12354464df0d85eb64e1 (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
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
/*
 *  Driver for the Conexant CX23885/7/8 PCIe bridge
 *
 *  Various common ioctl() support functions
 *
 *  Copyright (c) 2009 Andy Walls <awalls@md.metrocast.net>
 *
 *  This program is free software; you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation; either version 2 of the License, or
 *  (at your option) any later version.
 *
 *  This program is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *
 *  GNU General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License
 *  along with this program; if not, write to the Free Software
 *  Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
 */

#include "cx23885.h"
#include <media/v4l2-chip-ident.h>

int cx23885_g_chip_ident(struct file *file, void *fh,
			 struct v4l2_dbg_chip_ident *chip)
{
	struct cx23885_dev *dev = ((struct cx23885_fh *)fh)->dev;
	int err = 0;
	u8 rev;

	chip->ident = V4L2_IDENT_NONE;
	chip->revision = 0;
	switch (chip->match.type) {
	case V4L2_CHIP_MATCH_HOST:
		switch (chip->match.addr) {
		case 0:
			rev = cx_read(RDR_CFG2) & 0xff;
			switch (dev->pci->device) {
			case 0x8852:
				/* rev 0x04 could be '885 or '888. Pick '888. */
				if (rev == 0x04)
					chip->ident = V4L2_IDENT_CX23888;
				else
					chip->ident = V4L2_IDENT_CX23885;
				break;
			case 0x8880:
				if (rev == 0x0e || rev == 0x0f)
					chip->ident = V4L2_IDENT_CX23887;
				else
					chip->ident = V4L2_IDENT_CX23888;
				break;
			default:
				chip->ident = V4L2_IDENT_UNKNOWN;
				break;
			}
			chip->revision = (dev->pci->device << 16) | (rev << 8) |
					 (dev->hwrevision & 0xff);
			break;
		case 1:
			if (dev->v4l_device != NULL) {
				chip->ident = V4L2_IDENT_CX23417;
				chip->revision = 0;
			}
			break;
		case 2:
			/*
			 * The integrated IR controller on the CX23888 is
			 * host chip 2.  It may not be used/initialized or sd_ir
			 * may be pointing at the cx25840 subdevice for the
			 * IR controller on the CX23885.  Thus we find it
			 * without using the dev->sd_ir pointer.
			 */
			call_hw(dev, CX23885_HW_888_IR, core, g_chip_ident,
				chip);
			break;
		default:
			err = -EINVAL; /* per V4L2 spec */
			break;
		}
		break;
	case V4L2_CHIP_MATCH_I2C_DRIVER:
		/* If needed, returns V4L2_IDENT_AMBIGUOUS without extra work */
		call_all(dev, core, g_chip_ident, chip);
		break;
	case V4L2_CHIP_MATCH_I2C_ADDR:
		/*
		 * We could return V4L2_IDENT_UNKNOWN, but we don't do the work
		 * to look if a chip is at the address with no driver.  That's a
		 * dangerous thing to do with EEPROMs anyway.
		 */
		call_all(dev, core, g_chip_ident, chip);
		break;
	default:
		err = -EINVAL;
		break;
	}
	return err;
}

#ifdef CONFIG_VIDEO_ADV_DEBUG
static int cx23885_g_host_register(struct cx23885_dev *dev,
				   struct v4l2_dbg_register *reg)
{
	if ((reg->reg & 0x3) != 0 || reg->reg >= pci_resource_len(dev->pci, 0))
		return -EINVAL;

	reg->size = 4;
	reg->val = cx_read(reg->reg);
	return 0;
}

static int cx23417_g_register(struct cx23885_dev *dev,
			      struct v4l2_dbg_register *reg)
{
	u32 value;

	if (dev->v4l_device == NULL)
		return -EINVAL;

	if ((reg->reg & 0x3) != 0 || reg->reg >= 0x10000)
		return -EINVAL;

	if (mc417_register_read(dev, (u16) reg->reg, &value))
		return -EINVAL; /* V4L2 spec, but -EREMOTEIO really */

	reg->size = 4;
	reg->val = value;
	return 0;
}

int cx23885_g_register(struct file *file, void *fh,
		       struct v4l2_dbg_register *reg)
{
	struct cx23885_dev *dev = ((struct cx23885_fh *)fh)->dev;

	if (!capable(CAP_SYS_ADMIN))
		return -EPERM;

	if (reg->match.type == V4L2_CHIP_MATCH_HOST) {
		switch (reg->match.addr) {
		case 0:
			return cx23885_g_host_register(dev, reg);
		case 1:
			return cx23417_g_register(dev, reg);
		default:
			break;
		}
	}

	/* FIXME - any error returns should not be ignored */
	call_all(dev, core, g_register, reg);
	return 0;
}

static int cx23885_s_host_register(struct cx23885_dev *dev,
				   struct v4l2_dbg_register *reg)
{
	if ((reg->reg & 0x3) != 0 || reg->reg >= pci_resource_len(dev->pci, 0))
		return -EINVAL;

	reg->size = 4;
	cx_write(reg->reg, reg->val);
	return 0;
}

static int cx23417_s_register(struct cx23885_dev *dev,
			      struct v4l2_dbg_register *reg)
{
	if (dev->v4l_device == NULL)
		return -EINVAL;

	if ((reg->reg & 0x3) != 0 || reg->reg >= 0x10000)
		return -EINVAL;

	if (mc417_register_write(dev, (u16) reg->reg, (u32) reg->val))
		return -EINVAL; /* V4L2 spec, but -EREMOTEIO really */

	reg->size = 4;
	return 0;
}

int cx23885_s_register(struct file *file, void *fh,
		       struct v4l2_dbg_register *reg)
{
	struct cx23885_dev *dev = ((struct cx23885_fh *)fh)->dev;

	if (!capable(CAP_SYS_ADMIN))
		return -EPERM;

	if (reg->match.type == V4L2_CHIP_MATCH_HOST) {
		switch (reg->match.addr) {
		case 0:
			return cx23885_s_host_register(dev, reg);
		case 1:
			return cx23417_s_register(dev, reg);
		default:
			break;
		}
	}

	/* FIXME - any error returns should not be ignored */
	call_all(dev, core, s_register, reg);
	return 0;
}
#endif