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@md.metrocast.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		case 2:
69			/*
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.
75			 */
76			call_hw(dev, CX23885_HW_888_IR, core, g_chip_ident,
77				chip);
78			break;
79		default:
80			err = -EINVAL; /* per V4L2 spec */
81			break;
82		}
83		break;
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);
87		break;
88	case V4L2_CHIP_MATCH_I2C_ADDR:
89		/*
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.
93		 */
94		call_all(dev, core, g_chip_ident, chip);
95		break;
96	default:
97		err = -EINVAL;
98		break;
99	}
100	return err;
101}
102
103#ifdef CONFIG_VIDEO_ADV_DEBUG
104static int cx23885_g_host_register(struct cx23885_dev *dev,
105				   struct v4l2_dbg_register *reg)
106{
107	if ((reg->reg & 0x3) != 0 || reg->reg >= pci_resource_len(dev->pci, 0))
108		return -EINVAL;
109
110	reg->size = 4;
111	reg->val = cx_read(reg->reg);
112	return 0;
113}
114
115static int cx23417_g_register(struct cx23885_dev *dev,
116			      struct v4l2_dbg_register *reg)
117{
118	u32 value;
119
120	if (dev->v4l_device == NULL)
121		return -EINVAL;
122
123	if ((reg->reg & 0x3) != 0 || reg->reg >= 0x10000)
124		return -EINVAL;
125
126	if (mc417_register_read(dev, (u16) reg->reg, &value))
127		return -EINVAL; /* V4L2 spec, but -EREMOTEIO really */
128
129	reg->size = 4;
130	reg->val = value;
131	return 0;
132}
133
134int cx23885_g_register(struct file *file, void *fh,
135		       struct v4l2_dbg_register *reg)
136{
137	struct cx23885_dev *dev = ((struct cx23885_fh *)fh)->dev;
138
139	if (!capable(CAP_SYS_ADMIN))
140		return -EPERM;
141
142	if (reg->match.type == V4L2_CHIP_MATCH_HOST) {
143		switch (reg->match.addr) {
144		case 0:
145			return cx23885_g_host_register(dev, reg);
146		case 1:
147			return cx23417_g_register(dev, reg);
148		default:
149			break;
150		}
151	}
152
153	/* FIXME - any error returns should not be ignored */
154	call_all(dev, core, g_register, reg);
155	return 0;
156}
157
158static int cx23885_s_host_register(struct cx23885_dev *dev,
159				   struct v4l2_dbg_register *reg)
160{
161	if ((reg->reg & 0x3) != 0 || reg->reg >= pci_resource_len(dev->pci, 0))
162		return -EINVAL;
163
164	reg->size = 4;
165	cx_write(reg->reg, reg->val);
166	return 0;
167}
168
169static int cx23417_s_register(struct cx23885_dev *dev,
170			      struct v4l2_dbg_register *reg)
171{
172	if (dev->v4l_device == NULL)
173		return -EINVAL;
174
175	if ((reg->reg & 0x3) != 0 || reg->reg >= 0x10000)
176		return -EINVAL;
177
178	if (mc417_register_write(dev, (u16) reg->reg, (u32) reg->val))
179		return -EINVAL; /* V4L2 spec, but -EREMOTEIO really */
180
181	reg->size = 4;
182	return 0;
183}
184
185int cx23885_s_register(struct file *file, void *fh,
186		       struct v4l2_dbg_register *reg)
187{
188	struct cx23885_dev *dev = ((struct cx23885_fh *)fh)->dev;
189
190	if (!capable(CAP_SYS_ADMIN))
191		return -EPERM;
192
193	if (reg->match.type == V4L2_CHIP_MATCH_HOST) {
194		switch (reg->match.addr) {
195		case 0:
196			return cx23885_s_host_register(dev, reg);
197		case 1:
198			return cx23417_s_register(dev, reg);
199		default:
200			break;
201		}
202	}
203
204	/* FIXME - any error returns should not be ignored */
205	call_all(dev, core, s_register, reg);
206	return 0;
207}
208#endif
209