Release 4.7 drivers/media/pci/cx88/cx88-vp3054-i2c.c
/*
cx88-vp3054-i2c.c -- support for the secondary I2C bus of the
DNTV Live! DVB-T Pro (VP-3054), wired as:
GPIO[0] -> SCL, GPIO[1] -> SDA
(c) 2005 Chris Pascoe <c.pascoe@itee.uq.edu.au>
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 <linux/module.h>
#include <linux/slab.h>
#include <linux/init.h>
#include <asm/io.h>
#include "cx88.h"
#include "cx88-vp3054-i2c.h"
MODULE_DESCRIPTION("driver for cx2388x VP3054 design");
MODULE_AUTHOR("Chris Pascoe <c.pascoe@itee.uq.edu.au>");
MODULE_LICENSE("GPL");
/* ----------------------------------------------------------------------- */
static void vp3054_bit_setscl(void *data, int state)
{
struct cx8802_dev *dev = data;
struct cx88_core *core = dev->core;
struct vp3054_i2c_state *vp3054_i2c = dev->vp3054;
if (state) {
vp3054_i2c->state |= 0x0001; /* SCL high */
vp3054_i2c->state &= ~0x0100; /* external pullup */
} else {
vp3054_i2c->state &= ~0x0001; /* SCL low */
vp3054_i2c->state |= 0x0100; /* drive pin */
}
cx_write(MO_GP0_IO, 0x010000 | vp3054_i2c->state);
cx_read(MO_GP0_IO);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| chris pascoe | chris pascoe | 92 | 98.92% | 1 | 50.00% |
| trent piepho | trent piepho | 1 | 1.08% | 1 | 50.00% |
| Total | 93 | 100.00% | 2 | 100.00% |
static void vp3054_bit_setsda(void *data, int state)
{
struct cx8802_dev *dev = data;
struct cx88_core *core = dev->core;
struct vp3054_i2c_state *vp3054_i2c = dev->vp3054;
if (state) {
vp3054_i2c->state |= 0x0002; /* SDA high */
vp3054_i2c->state &= ~0x0200; /* tristate pin */
} else {
vp3054_i2c->state &= ~0x0002; /* SDA low */
vp3054_i2c->state |= 0x0200; /* drive pin */
}
cx_write(MO_GP0_IO, 0x020000 | vp3054_i2c->state);
cx_read(MO_GP0_IO);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| chris pascoe | chris pascoe | 92 | 98.92% | 1 | 50.00% |
| trent piepho | trent piepho | 1 | 1.08% | 1 | 50.00% |
| Total | 93 | 100.00% | 2 | 100.00% |
static int vp3054_bit_getscl(void *data)
{
struct cx8802_dev *dev = data;
struct cx88_core *core = dev->core;
u32 state;
state = cx_read(MO_GP0_IO);
return (state & 0x01) ? 1 : 0;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| chris pascoe | chris pascoe | 47 | 100.00% | 1 | 100.00% |
| Total | 47 | 100.00% | 1 | 100.00% |
static int vp3054_bit_getsda(void *data)
{
struct cx8802_dev *dev = data;
struct cx88_core *core = dev->core;
u32 state;
state = cx_read(MO_GP0_IO);
return (state & 0x02) ? 1 : 0;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| chris pascoe | chris pascoe | 47 | 100.00% | 1 | 100.00% |
| Total | 47 | 100.00% | 1 | 100.00% |
/* ----------------------------------------------------------------------- */
static const struct i2c_algo_bit_data vp3054_i2c_algo_template = {
.setsda = vp3054_bit_setsda,
.setscl = vp3054_bit_setscl,
.getsda = vp3054_bit_getsda,
.getscl = vp3054_bit_getscl,
.udelay = 16,
.timeout = 200,
};
/* ----------------------------------------------------------------------- */
int vp3054_i2c_probe(struct cx8802_dev *dev)
{
struct cx88_core *core = dev->core;
struct vp3054_i2c_state *vp3054_i2c;
int rc;
if (core->boardnr != CX88_BOARD_DNTV_LIVE_DVB_T_PRO)
return 0;
vp3054_i2c = kzalloc(sizeof(*vp3054_i2c), GFP_KERNEL);
if (vp3054_i2c == NULL)
return -ENOMEM;
dev->vp3054 = vp3054_i2c;
vp3054_i2c->algo = vp3054_i2c_algo_template;
vp3054_i2c->adap.dev.parent = &dev->pci->dev;
strlcpy(vp3054_i2c->adap.name, core->name,
sizeof(vp3054_i2c->adap.name));
vp3054_i2c->adap.owner = THIS_MODULE;
vp3054_i2c->algo.data = dev;
i2c_set_adapdata(&vp3054_i2c->adap, dev);
vp3054_i2c->adap.algo_data = &vp3054_i2c->algo;
vp3054_bit_setscl(dev,1);
vp3054_bit_setsda(dev,1);
rc = i2c_bit_add_bus(&vp3054_i2c->adap);
if (0 != rc) {
printk("%s: vp3054_i2c register FAILED\n", core->name);
kfree(dev->vp3054);
dev->vp3054 = NULL;
}
return rc;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| chris pascoe | chris pascoe | 187 | 91.67% | 1 | 20.00% |
| jean delvare | jean delvare | 8 | 3.92% | 1 | 20.00% |
| trent piepho | trent piepho | 8 | 3.92% | 2 | 40.00% |
| ezequiel garcia | ezequiel garcia | 1 | 0.49% | 1 | 20.00% |
| Total | 204 | 100.00% | 5 | 100.00% |
void vp3054_i2c_remove(struct cx8802_dev *dev)
{
struct vp3054_i2c_state *vp3054_i2c = dev->vp3054;
if (vp3054_i2c == NULL ||
dev->core->boardnr != CX88_BOARD_DNTV_LIVE_DVB_T_PRO)
return;
i2c_del_adapter(&vp3054_i2c->adap);
kfree(vp3054_i2c);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| chris pascoe | chris pascoe | 44 | 93.62% | 1 | 25.00% |
| trent piepho | trent piepho | 2 | 4.26% | 2 | 50.00% |
| jean delvare | jean delvare | 1 | 2.13% | 1 | 25.00% |
| Total | 47 | 100.00% | 4 | 100.00% |
EXPORT_SYMBOL(vp3054_i2c_probe);
EXPORT_SYMBOL(vp3054_i2c_remove);
Overall Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| chris pascoe | chris pascoe | 575 | 93.34% | 1 | 12.50% |
| mauro carvalho chehab | mauro carvalho chehab | 15 | 2.44% | 1 | 12.50% |
| trent piepho | trent piepho | 12 | 1.95% | 2 | 25.00% |
| jean delvare | jean delvare | 10 | 1.62% | 2 | 25.00% |
| tejun heo | tejun heo | 3 | 0.49% | 1 | 12.50% |
| ezequiel garcia | ezequiel garcia | 1 | 0.16% | 1 | 12.50% |
| Total | 616 | 100.00% | 8 | 100.00% |
Information contained on this website is for historical information purposes only and does not indicate or represent copyright ownership.