Release 4.7 drivers/misc/c2port/c2port-duramar2150.c
/*
* Silicon Labs C2 port Linux support for Eurotech Duramar 2150
*
* Copyright (c) 2008 Rodolfo Giometti <giometti@linux.it>
* Copyright (c) 2008 Eurotech S.p.A. <info@eurotech.it>
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 as published by
* the Free Software Foundation
*/
#include <linux/errno.h>
#include <linux/init.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/delay.h>
#include <linux/io.h>
#include <linux/ioport.h>
#include <linux/c2port.h>
#define DATA_PORT 0x325
#define DIR_PORT 0x326
#define C2D (1 << 0)
#define C2CK (1 << 1)
static DEFINE_MUTEX(update_lock);
/*
* C2 port operations
*/
static void duramar2150_c2port_access(struct c2port_device *dev, int status)
{
u8 v;
mutex_lock(&update_lock);
v = inb(DIR_PORT);
/* 0 = input, 1 = output */
if (status)
outb(v | (C2D | C2CK), DIR_PORT);
else
/* When access is "off" is important that both lines are set
* as inputs or hi-impedance */
outb(v & ~(C2D | C2CK), DIR_PORT);
mutex_unlock(&update_lock);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| rodolfo giometti | rodolfo giometti | 69 | 98.57% | 1 | 50.00% |
| lucas de marchi | lucas de marchi | 1 | 1.43% | 1 | 50.00% |
| Total | 70 | 100.00% | 2 | 100.00% |
static void duramar2150_c2port_c2d_dir(struct c2port_device *dev, int dir)
{
u8 v;
mutex_lock(&update_lock);
v = inb(DIR_PORT);
if (dir)
outb(v & ~C2D, DIR_PORT);
else
outb(v | C2D, DIR_PORT);
mutex_unlock(&update_lock);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| rodolfo giometti | rodolfo giometti | 60 | 100.00% | 1 | 100.00% |
| Total | 60 | 100.00% | 1 | 100.00% |
static int duramar2150_c2port_c2d_get(struct c2port_device *dev)
{
return inb(DATA_PORT) & C2D;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| rodolfo giometti | rodolfo giometti | 19 | 100.00% | 1 | 100.00% |
| Total | 19 | 100.00% | 1 | 100.00% |
static void duramar2150_c2port_c2d_set(struct c2port_device *dev, int status)
{
u8 v;
mutex_lock(&update_lock);
v = inb(DATA_PORT);
if (status)
outb(v | C2D, DATA_PORT);
else
outb(v & ~C2D, DATA_PORT);
mutex_unlock(&update_lock);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| rodolfo giometti | rodolfo giometti | 60 | 100.00% | 1 | 100.00% |
| Total | 60 | 100.00% | 1 | 100.00% |
static void duramar2150_c2port_c2ck_set(struct c2port_device *dev, int status)
{
u8 v;
mutex_lock(&update_lock);
v = inb(DATA_PORT);
if (status)
outb(v | C2CK, DATA_PORT);
else
outb(v & ~C2CK, DATA_PORT);
mutex_unlock(&update_lock);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| rodolfo giometti | rodolfo giometti | 60 | 100.00% | 1 | 100.00% |
| Total | 60 | 100.00% | 1 | 100.00% |
static struct c2port_ops duramar2150_c2port_ops = {
.block_size = 512, /* bytes */
.blocks_num = 30, /* total flash size: 15360 bytes */
.access = duramar2150_c2port_access,
.c2d_dir = duramar2150_c2port_c2d_dir,
.c2d_get = duramar2150_c2port_c2d_get,
.c2d_set = duramar2150_c2port_c2d_set,
.c2ck_set = duramar2150_c2port_c2ck_set,
};
static struct c2port_device *duramar2150_c2port_dev;
/*
* Module stuff
*/
static int __init duramar2150_c2port_init(void)
{
struct resource *res;
int ret = 0;
res = request_region(0x325, 2, "c2port");
if (!res)
return -EBUSY;
duramar2150_c2port_dev = c2port_device_register("uc",
&duramar2150_c2port_ops, NULL);
if (!duramar2150_c2port_dev) {
ret = -ENODEV;
goto free_region;
}
return 0;
free_region:
release_region(0x325, 2);
return ret;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| rodolfo giometti | rodolfo giometti | 81 | 100.00% | 1 | 100.00% |
| Total | 81 | 100.00% | 1 | 100.00% |
static void __exit duramar2150_c2port_exit(void)
{
/* Setup the GPIOs as input by default (access = 0) */
duramar2150_c2port_access(duramar2150_c2port_dev, 0);
c2port_device_unregister(duramar2150_c2port_dev);
release_region(0x325, 2);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| rodolfo giometti | rodolfo giometti | 29 | 100.00% | 1 | 100.00% |
| Total | 29 | 100.00% | 1 | 100.00% |
module_init(duramar2150_c2port_init);
module_exit(duramar2150_c2port_exit);
MODULE_AUTHOR("Rodolfo Giometti <giometti@linux.it>");
MODULE_DESCRIPTION("Silicon Labs C2 port Linux support for Duramar 2150");
MODULE_LICENSE("GPL");
Overall Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| rodolfo giometti | rodolfo giometti | 499 | 99.20% | 1 | 33.33% |
| paul gortmaker | paul gortmaker | 3 | 0.60% | 1 | 33.33% |
| lucas de marchi | lucas de marchi | 1 | 0.20% | 1 | 33.33% |
| Total | 503 | 100.00% | 3 | 100.00% |
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