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authorMauro Carvalho Chehab <mchehab@redhat.com>2012-08-14 11:13:30 -0400
committerMauro Carvalho Chehab <mchehab@redhat.com>2012-08-15 15:36:22 -0400
commitb285192a43f0432d82c2c10974204e78af0da596 (patch)
tree618aa87e760c9c949eca9e4df6ae0eeffa11dcfc /drivers/media/pci/saa7164/saa7164-i2c.c
parent68de959f773a1d49096835c411390bceff5d1549 (diff)
[media] rename most media/video pci drivers to media/pci
Rename all PCI drivers with their own directory under drivers/media/video into drivers/media/pci and update the building system. Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
Diffstat (limited to 'drivers/media/pci/saa7164/saa7164-i2c.c')
-rw-r--r--drivers/media/pci/saa7164/saa7164-i2c.c125
1 files changed, 125 insertions, 0 deletions
diff --git a/drivers/media/pci/saa7164/saa7164-i2c.c b/drivers/media/pci/saa7164/saa7164-i2c.c
new file mode 100644
index 000000000000..4f7e3b42263f
--- /dev/null
+++ b/drivers/media/pci/saa7164/saa7164-i2c.c
@@ -0,0 +1,125 @@
1/*
2 * Driver for the NXP SAA7164 PCIe bridge
3 *
4 * Copyright (c) 2010 Steven Toth <stoth@kernellabs.com>
5 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or
9 * (at your option) any later version.
10 *
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 *
15 * GNU General Public License for more details.
16 *
17 * You should have received a copy of the GNU General Public License
18 * along with this program; if not, write to the Free Software
19 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
20 */
21
22#include <linux/module.h>
23#include <linux/moduleparam.h>
24#include <linux/init.h>
25#include <linux/delay.h>
26#include <linux/io.h>
27
28#include "saa7164.h"
29
30static int i2c_xfer(struct i2c_adapter *i2c_adap, struct i2c_msg *msgs, int num)
31{
32 struct saa7164_i2c *bus = i2c_adap->algo_data;
33 struct saa7164_dev *dev = bus->dev;
34 int i, retval = 0;
35
36 dprintk(DBGLVL_I2C, "%s(num = %d)\n", __func__, num);
37
38 for (i = 0 ; i < num; i++) {
39 dprintk(DBGLVL_I2C, "%s(num = %d) addr = 0x%02x len = 0x%x\n",
40 __func__, num, msgs[i].addr, msgs[i].len);
41 if (msgs[i].flags & I2C_M_RD) {
42 /* Unsupported - Yet*/
43 printk(KERN_ERR "%s() Unsupported - Yet\n", __func__);
44 continue;
45 } else if (i + 1 < num && (msgs[i + 1].flags & I2C_M_RD) &&
46 msgs[i].addr == msgs[i + 1].addr) {
47 /* write then read from same address */
48
49 retval = saa7164_api_i2c_read(bus, msgs[i].addr,
50 msgs[i].len, msgs[i].buf,
51 msgs[i+1].len, msgs[i+1].buf
52 );
53
54 i++;
55
56 if (retval < 0)
57 goto err;
58 } else {
59 /* write */
60 retval = saa7164_api_i2c_write(bus, msgs[i].addr,
61 msgs[i].len, msgs[i].buf);
62 }
63 if (retval < 0)
64 goto err;
65 }
66 return num;
67
68err:
69 return retval;
70}
71
72static u32 saa7164_functionality(struct i2c_adapter *adap)
73{
74 return I2C_FUNC_I2C;
75}
76
77static struct i2c_algorithm saa7164_i2c_algo_template = {
78 .master_xfer = i2c_xfer,
79 .functionality = saa7164_functionality,
80};
81
82/* ----------------------------------------------------------------------- */
83
84static struct i2c_adapter saa7164_i2c_adap_template = {
85 .name = "saa7164",
86 .owner = THIS_MODULE,
87 .algo = &saa7164_i2c_algo_template,
88};
89
90static struct i2c_client saa7164_i2c_client_template = {
91 .name = "saa7164 internal",
92};
93
94int saa7164_i2c_register(struct saa7164_i2c *bus)
95{
96 struct saa7164_dev *dev = bus->dev;
97
98 dprintk(DBGLVL_I2C, "%s(bus = %d)\n", __func__, bus->nr);
99
100 bus->i2c_adap = saa7164_i2c_adap_template;
101 bus->i2c_client = saa7164_i2c_client_template;
102
103 bus->i2c_adap.dev.parent = &dev->pci->dev;
104
105 strlcpy(bus->i2c_adap.name, bus->dev->name,
106 sizeof(bus->i2c_adap.name));
107
108 bus->i2c_adap.algo_data = bus;
109 i2c_set_adapdata(&bus->i2c_adap, bus);
110 i2c_add_adapter(&bus->i2c_adap);
111
112 bus->i2c_client.adapter = &bus->i2c_adap;
113
114 if (0 != bus->i2c_rc)
115 printk(KERN_ERR "%s: i2c bus %d register FAILED\n",
116 dev->name, bus->nr);
117
118 return bus->i2c_rc;
119}
120
121int saa7164_i2c_unregister(struct saa7164_i2c *bus)
122{
123 i2c_del_adapter(&bus->i2c_adap);
124 return 0;
125}