2 * Driver for the Conexant CX23885/7/8 PCIe bridge
4 * Various common ioctl() support functions
6 * Copyright (c) 2009 Andy Walls <awalls@md.metrocast.net>
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.
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
17 * GNU General Public License for more details.
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.
25 #include <media/v4l2-chip-ident.h>
27 int cx23885_g_chip_ident(struct file *file, void *fh,
28 struct v4l2_dbg_chip_ident *chip)
30 struct cx23885_dev *dev = ((struct cx23885_fh *)fh)->dev;
34 chip->ident = V4L2_IDENT_NONE;
36 switch (chip->match.type) {
37 case V4L2_CHIP_MATCH_HOST:
38 switch (chip->match.addr) {
40 rev = cx_read(RDR_CFG2) & 0xff;
41 switch (dev->pci->device) {
43 /* rev 0x04 could be '885 or '888. Pick '888. */
45 chip->ident = V4L2_IDENT_CX23888;
47 chip->ident = V4L2_IDENT_CX23885;
50 if (rev == 0x0e || rev == 0x0f)
51 chip->ident = V4L2_IDENT_CX23887;
53 chip->ident = V4L2_IDENT_CX23888;
56 chip->ident = V4L2_IDENT_UNKNOWN;
59 chip->revision = (dev->pci->device << 16) | (rev << 8) |
60 (dev->hwrevision & 0xff);
63 if (dev->v4l_device != NULL) {
64 chip->ident = V4L2_IDENT_CX23417;
70 * The integrated IR controller on the CX23888 is
71 * host chip 2. It may not be used/initialized or sd_ir
72 * may be pointing at the cx25840 subdevice for the
73 * IR controller on the CX23885. Thus we find it
74 * without using the dev->sd_ir pointer.
76 call_hw(dev, CX23885_HW_888_IR, core, g_chip_ident,
80 err = -EINVAL; /* per V4L2 spec */
84 case V4L2_CHIP_MATCH_I2C_DRIVER:
85 /* If needed, returns V4L2_IDENT_AMBIGUOUS without extra work */
86 call_all(dev, core, g_chip_ident, chip);
88 case V4L2_CHIP_MATCH_I2C_ADDR:
90 * We could return V4L2_IDENT_UNKNOWN, but we don't do the work
91 * to look if a chip is at the address with no driver. That's a
92 * dangerous thing to do with EEPROMs anyway.
94 call_all(dev, core, g_chip_ident, chip);
103 #ifdef CONFIG_VIDEO_ADV_DEBUG
104 static int cx23885_g_host_register(struct cx23885_dev *dev,
105 struct v4l2_dbg_register *reg)
107 if ((reg->reg & 0x3) != 0 || reg->reg >= pci_resource_len(dev->pci, 0))
111 reg->val = cx_read(reg->reg);
115 static int cx23417_g_register(struct cx23885_dev *dev,
116 struct v4l2_dbg_register *reg)
120 if (dev->v4l_device == NULL)
123 if ((reg->reg & 0x3) != 0 || reg->reg >= 0x10000)
126 if (mc417_register_read(dev, (u16) reg->reg, &value))
127 return -EINVAL; /* V4L2 spec, but -EREMOTEIO really */
134 int cx23885_g_register(struct file *file, void *fh,
135 struct v4l2_dbg_register *reg)
137 struct cx23885_dev *dev = ((struct cx23885_fh *)fh)->dev;
139 if (!capable(CAP_SYS_ADMIN))
142 if (reg->match.type == V4L2_CHIP_MATCH_HOST) {
143 switch (reg->match.addr) {
145 return cx23885_g_host_register(dev, reg);
147 return cx23417_g_register(dev, reg);
153 /* FIXME - any error returns should not be ignored */
154 call_all(dev, core, g_register, reg);
158 static int cx23885_s_host_register(struct cx23885_dev *dev,
159 struct v4l2_dbg_register *reg)
161 if ((reg->reg & 0x3) != 0 || reg->reg >= pci_resource_len(dev->pci, 0))
165 cx_write(reg->reg, reg->val);
169 static int cx23417_s_register(struct cx23885_dev *dev,
170 struct v4l2_dbg_register *reg)
172 if (dev->v4l_device == NULL)
175 if ((reg->reg & 0x3) != 0 || reg->reg >= 0x10000)
178 if (mc417_register_write(dev, (u16) reg->reg, (u32) reg->val))
179 return -EINVAL; /* V4L2 spec, but -EREMOTEIO really */
185 int cx23885_s_register(struct file *file, void *fh,
186 struct v4l2_dbg_register *reg)
188 struct cx23885_dev *dev = ((struct cx23885_fh *)fh)->dev;
190 if (!capable(CAP_SYS_ADMIN))
193 if (reg->match.type == V4L2_CHIP_MATCH_HOST) {
194 switch (reg->match.addr) {
196 return cx23885_s_host_register(dev, reg);
198 return cx23417_s_register(dev, reg);
204 /* FIXME - any error returns should not be ignored */
205 call_all(dev, core, s_register, reg);