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Diffstat (limited to 'drivers/media/video/cx23885/cx23885-ioctl.c')
-rw-r--r--drivers/media/video/cx23885/cx23885-ioctl.c197
1 files changed, 197 insertions, 0 deletions
diff --git a/drivers/media/video/cx23885/cx23885-ioctl.c b/drivers/media/video/cx23885/cx23885-ioctl.c
new file mode 100644
index 000000000000..3a497b6c4fd7
--- /dev/null
+++ b/drivers/media/video/cx23885/cx23885-ioctl.c
@@ -0,0 +1,197 @@
1/*
2 * Driver for the Conexant CX23885/7/8 PCIe bridge
3 *
4 * Various common ioctl() support functions
5 *
6 * Copyright (c) 2009 Andy Walls <awalls@radix.net>
7 *
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License as published by
10 * the Free Software Foundation; either version 2 of the License, or
11 * (at your option) any later version.
12 *
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 *
17 * GNU General Public License for more details.
18 *
19 * You should have received a copy of the GNU General Public License
20 * along with this program; if not, write to the Free Software
21 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
22 */
23
24#include "cx23885.h"
25#include <media/v4l2-chip-ident.h>
26
27int cx23885_g_chip_ident(struct file *file, void *fh,
28 struct v4l2_dbg_chip_ident *chip)
29{
30 struct cx23885_dev *dev = ((struct cx23885_fh *)fh)->dev;
31 int err = 0;
32 u8 rev;
33
34 chip->ident = V4L2_IDENT_NONE;
35 chip->revision = 0;
36 switch (chip->match.type) {
37 case V4L2_CHIP_MATCH_HOST:
38 switch (chip->match.addr) {
39 case 0:
40 rev = cx_read(RDR_CFG2) & 0xff;
41 switch (dev->pci->device) {
42 case 0x8852:
43 /* rev 0x04 could be '885 or '888. Pick '888. */
44 if (rev == 0x04)
45 chip->ident = V4L2_IDENT_CX23888;
46 else
47 chip->ident = V4L2_IDENT_CX23885;
48 break;
49 case 0x8880:
50 if (rev == 0x0e || rev == 0x0f)
51 chip->ident = V4L2_IDENT_CX23887;
52 else
53 chip->ident = V4L2_IDENT_CX23888;
54 break;
55 default:
56 chip->ident = V4L2_IDENT_UNKNOWN;
57 break;
58 }
59 chip->revision = (dev->pci->device << 16) | (rev << 8) |
60 (dev->hwrevision & 0xff);
61 break;
62 case 1:
63 if (dev->v4l_device != NULL) {
64 chip->ident = V4L2_IDENT_CX23417;
65 chip->revision = 0;
66 }
67 break;
68 default:
69 err = -EINVAL; /* per V4L2 spec */
70 break;
71 }
72 break;
73 case V4L2_CHIP_MATCH_I2C_DRIVER:
74 /* If needed, returns V4L2_IDENT_AMBIGUOUS without extra work */
75 call_all(dev, core, g_chip_ident, chip);
76 break;
77 case V4L2_CHIP_MATCH_I2C_ADDR:
78 /*
79 * We could return V4L2_IDENT_UNKNOWN, but we don't do the work
80 * to look if a chip is at the address with no driver. That's a
81 * dangerous thing to do with EEPROMs anyway.
82 */
83 call_all(dev, core, g_chip_ident, chip);
84 break;
85 default:
86 err = -EINVAL;
87 break;
88 }
89 return err;
90}
91
92#ifdef CONFIG_VIDEO_ADV_DEBUG
93static int cx23885_g_host_register(struct cx23885_dev *dev,
94 struct v4l2_dbg_register *reg)
95{
96 if ((reg->reg & 0x3) != 0 || reg->reg >= pci_resource_len(dev->pci, 0))
97 return -EINVAL;
98
99 reg->size = 4;
100 reg->val = cx_read(reg->reg);
101 return 0;
102}
103
104static int cx23417_g_register(struct cx23885_dev *dev,
105 struct v4l2_dbg_register *reg)
106{
107 u32 value;
108
109 if (dev->v4l_device == NULL)
110 return -EINVAL;
111
112 if ((reg->reg & 0x3) != 0 || reg->reg >= 0x10000)
113 return -EINVAL;
114
115 if (mc417_register_read(dev, (u16) reg->reg, &value))
116 return -EINVAL; /* V4L2 spec, but -EREMOTEIO really */
117
118 reg->size = 4;
119 reg->val = value;
120 return 0;
121}
122
123int cx23885_g_register(struct file *file, void *fh,
124 struct v4l2_dbg_register *reg)
125{
126 struct cx23885_dev *dev = ((struct cx23885_fh *)fh)->dev;
127
128 if (!capable(CAP_SYS_ADMIN))
129 return -EPERM;
130
131 if (reg->match.type == V4L2_CHIP_MATCH_HOST) {
132 switch (reg->match.addr) {
133 case 0:
134 return cx23885_g_host_register(dev, reg);
135 case 1:
136 return cx23417_g_register(dev, reg);
137 default:
138 break;
139 }
140 }
141
142 /* FIXME - any error returns should not be ignored */
143 call_all(dev, core, g_register, reg);
144 return 0;
145}
146
147static int cx23885_s_host_register(struct cx23885_dev *dev,
148 struct v4l2_dbg_register *reg)
149{
150 if ((reg->reg & 0x3) != 0 || reg->reg >= pci_resource_len(dev->pci, 0))
151 return -EINVAL;
152
153 reg->size = 4;
154 cx_write(reg->reg, reg->val);
155 return 0;
156}
157
158static int cx23417_s_register(struct cx23885_dev *dev,
159 struct v4l2_dbg_register *reg)
160{
161 if (dev->v4l_device == NULL)
162 return -EINVAL;
163
164 if ((reg->reg & 0x3) != 0 || reg->reg >= 0x10000)
165 return -EINVAL;
166
167 if (mc417_register_write(dev, (u16) reg->reg, (u32) reg->val))
168 return -EINVAL; /* V4L2 spec, but -EREMOTEIO really */
169
170 reg->size = 4;
171 return 0;
172}
173
174int cx23885_s_register(struct file *file, void *fh,
175 struct v4l2_dbg_register *reg)
176{
177 struct cx23885_dev *dev = ((struct cx23885_fh *)fh)->dev;
178
179 if (!capable(CAP_SYS_ADMIN))
180 return -EPERM;
181
182 if (reg->match.type == V4L2_CHIP_MATCH_HOST) {
183 switch (reg->match.addr) {
184 case 0:
185 return cx23885_s_host_register(dev, reg);
186 case 1:
187 return cx23417_s_register(dev, reg);
188 default:
189 break;
190 }
191 }
192
193 /* FIXME - any error returns should not be ignored */
194 call_all(dev, core, s_register, reg);
195 return 0;
196}
197#endif
generated by cgit v1.2.2 (git 2.25.0) at 2025-02-23 18:27:59 -0500