Release 4.7 drivers/i2c/busses/i2c-hydra.c
/*
i2c Support for the Apple `Hydra' Mac I/O
Copyright (c) 1999-2004 Geert Uytterhoeven <geert@linux-m68k.org>
Based on i2c Support for Via Technologies 82C586B South Bridge
Copyright (c) 1998, 1999 Kyösti Mälkki <kmalkki@cc.hut.fi>
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.
*/
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/pci.h>
#include <linux/types.h>
#include <linux/i2c.h>
#include <linux/i2c-algo-bit.h>
#include <linux/io.h>
#include <asm/hydra.h>
#define HYDRA_CPD_PD0 0x00000001
/* CachePD lines */
#define HYDRA_CPD_PD1 0x00000002
#define HYDRA_CPD_PD2 0x00000004
#define HYDRA_CPD_PD3 0x00000008
#define HYDRA_SCLK HYDRA_CPD_PD0
#define HYDRA_SDAT HYDRA_CPD_PD1
#define HYDRA_SCLK_OE 0x00000010
#define HYDRA_SDAT_OE 0x00000020
static inline void pdregw(void *data, u32 val)
{
struct Hydra *hydra = (struct Hydra *)data;
writel(val, &hydra->CachePD);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| geert uytterhoeven | geert uytterhoeven | 36 | 100.00% | 1 | 100.00% |
| Total | 36 | 100.00% | 1 | 100.00% |
static inline u32 pdregr(void *data)
{
struct Hydra *hydra = (struct Hydra *)data;
return readl(&hydra->CachePD);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| geert uytterhoeven | geert uytterhoeven | 32 | 100.00% | 1 | 100.00% |
| Total | 32 | 100.00% | 1 | 100.00% |
static void hydra_bit_setscl(void *data, int state)
{
u32 val = pdregr(data);
if (state)
val &= ~HYDRA_SCLK_OE;
else {
val &= ~HYDRA_SCLK;
val |= HYDRA_SCLK_OE;
}
pdregw(data, val);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| geert uytterhoeven | geert uytterhoeven | 49 | 100.00% | 1 | 100.00% |
| Total | 49 | 100.00% | 1 | 100.00% |
static void hydra_bit_setsda(void *data, int state)
{
u32 val = pdregr(data);
if (state)
val &= ~HYDRA_SDAT_OE;
else {
val &= ~HYDRA_SDAT;
val |= HYDRA_SDAT_OE;
}
pdregw(data, val);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| geert uytterhoeven | geert uytterhoeven | 49 | 100.00% | 1 | 100.00% |
| Total | 49 | 100.00% | 1 | 100.00% |
static int hydra_bit_getscl(void *data)
{
return (pdregr(data) & HYDRA_SCLK) != 0;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| geert uytterhoeven | geert uytterhoeven | 22 | 100.00% | 1 | 100.00% |
| Total | 22 | 100.00% | 1 | 100.00% |
static int hydra_bit_getsda(void *data)
{
return (pdregr(data) & HYDRA_SDAT) != 0;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| geert uytterhoeven | geert uytterhoeven | 22 | 100.00% | 1 | 100.00% |
| Total | 22 | 100.00% | 1 | 100.00% |
/* ------------------------------------------------------------------------ */
static struct i2c_algo_bit_data hydra_bit_data = {
.setsda = hydra_bit_setsda,
.setscl = hydra_bit_setscl,
.getsda = hydra_bit_getsda,
.getscl = hydra_bit_getscl,
.udelay = 5,
.timeout = HZ
};
static struct i2c_adapter hydra_adap = {
.owner = THIS_MODULE,
.name = "Hydra i2c",
.algo_data = &hydra_bit_data,
};
static const struct pci_device_id hydra_ids[] = {
{ PCI_DEVICE(PCI_VENDOR_ID_APPLE, PCI_DEVICE_ID_APPLE_HYDRA) },
{ 0, }
};
MODULE_DEVICE_TABLE (pci, hydra_ids);
static int hydra_probe(struct pci_dev *dev,
const struct pci_device_id *id)
{
unsigned long base = pci_resource_start(dev, 0);
int res;
if (!request_mem_region(base+offsetof(struct Hydra, CachePD), 4,
hydra_adap.name))
return -EBUSY;
hydra_bit_data.data = pci_ioremap_bar(dev, 0);
if (hydra_bit_data.data == NULL) {
release_mem_region(base+offsetof(struct Hydra, CachePD), 4);
return -ENODEV;
}
pdregw(hydra_bit_data.data, 0); /* clear SCLK_OE and SDAT_OE */
hydra_adap.dev.parent = &dev->dev;
res = i2c_bit_add_bus(&hydra_adap);
if (res < 0) {
iounmap(hydra_bit_data.data);
release_mem_region(base+offsetof(struct Hydra, CachePD), 4);
return res;
}
return 0;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| geert uytterhoeven | geert uytterhoeven | 161 | 99.38% | 1 | 50.00% |
| arjan van de ven | arjan van de ven | 1 | 0.62% | 1 | 50.00% |
| Total | 162 | 100.00% | 2 | 100.00% |
static void hydra_remove(struct pci_dev *dev)
{
pdregw(hydra_bit_data.data, 0); /* clear SCLK_OE and SDAT_OE */
i2c_del_adapter(&hydra_adap);
iounmap(hydra_bit_data.data);
release_mem_region(pci_resource_start(dev, 0)+
offsetof(struct Hydra, CachePD), 4);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| geert uytterhoeven | geert uytterhoeven | 53 | 98.15% | 1 | 50.00% |
| jean delvare | jean delvare | 1 | 1.85% | 1 | 50.00% |
| Total | 54 | 100.00% | 2 | 100.00% |
static struct pci_driver hydra_driver = {
.name = "hydra_smbus",
.id_table = hydra_ids,
.probe = hydra_probe,
.remove = hydra_remove,
};
module_pci_driver(hydra_driver);
MODULE_AUTHOR("Geert Uytterhoeven <geert@linux-m68k.org>");
MODULE_DESCRIPTION("i2c for Apple Hydra Mac I/O");
MODULE_LICENSE("GPL");
Overall Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| geert uytterhoeven | geert uytterhoeven | 595 | 95.81% | 1 | 10.00% |
| jean delvare | jean delvare | 8 | 1.29% | 2 | 20.00% |
| matthieu castet | matthieu castet | 7 | 1.13% | 1 | 10.00% |
| jingoo han | jingoo han | 6 | 0.97% | 1 | 10.00% |
| wolfram sang | wolfram sang | 1 | 0.16% | 1 | 10.00% |
| deepak saxena | deepak saxena | 1 | 0.16% | 1 | 10.00% |
| arjan van de ven | arjan van de ven | 1 | 0.16% | 1 | 10.00% |
| axel lin | axel lin | 1 | 0.16% | 1 | 10.00% |
| h hartley sweeten | h hartley sweeten | 1 | 0.16% | 1 | 10.00% |
| Total | 621 | 100.00% | 10 | 100.00% |
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