Release 4.7 drivers/video/fbdev/i810/i810-i2c.c
/*-*- linux-c -*-
* linux/drivers/video/i810-i2c.c -- Intel 810/815 I2C support
*
* Copyright (C) 2004 Antonino Daplas<adaplas@pol.net>
* All Rights Reserved
*
* This file is subject to the terms and conditions of the GNU General Public
* License. See the file COPYING in the main directory of this archive for
* more details.
*/
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/delay.h>
#include <linux/gfp.h>
#include <linux/pci.h>
#include <linux/fb.h>
#include "i810.h"
#include "i810_regs.h"
#include "i810_main.h"
#include "../edid.h"
/* bit locations in the registers */
#define SCL_DIR_MASK 0x0001
#define SCL_DIR 0x0002
#define SCL_VAL_MASK 0x0004
#define SCL_VAL_OUT 0x0008
#define SCL_VAL_IN 0x0010
#define SDA_DIR_MASK 0x0100
#define SDA_DIR 0x0200
#define SDA_VAL_MASK 0x0400
#define SDA_VAL_OUT 0x0800
#define SDA_VAL_IN 0x1000
#define DEBUG
/* define this for verbose EDID parsing output */
#ifdef DEBUG
#define DPRINTK(fmt, args...) printk(fmt,## args)
#else
#define DPRINTK(fmt, args...)
#endif
static void i810i2c_setscl(void *data, int state)
{
struct i810fb_i2c_chan *chan = data;
struct i810fb_par *par = chan->par;
u8 __iomem *mmio = par->mmio_start_virtual;
if (state)
i810_writel(mmio, chan->ddc_base, SCL_DIR_MASK | SCL_VAL_MASK);
else
i810_writel(mmio, chan->ddc_base, SCL_DIR | SCL_DIR_MASK | SCL_VAL_MASK);
i810_readl(mmio, chan->ddc_base); /* flush posted write */
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| antonino daplas | antonino daplas | 63 | 77.78% | 2 | 50.00% |
| stefani seibold | stefani seibold | 17 | 20.99% | 1 | 25.00% |
| al viro | al viro | 1 | 1.23% | 1 | 25.00% |
| Total | 81 | 100.00% | 4 | 100.00% |
static void i810i2c_setsda(void *data, int state)
{
struct i810fb_i2c_chan *chan = data;
struct i810fb_par *par = chan->par;
u8 __iomem *mmio = par->mmio_start_virtual;
if (state)
i810_writel(mmio, chan->ddc_base, SDA_DIR_MASK | SDA_VAL_MASK);
else
i810_writel(mmio, chan->ddc_base, SDA_DIR | SDA_DIR_MASK | SDA_VAL_MASK);
i810_readl(mmio, chan->ddc_base); /* flush posted write */
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| antonino daplas | antonino daplas | 63 | 77.78% | 2 | 50.00% |
| stefani seibold | stefani seibold | 17 | 20.99% | 1 | 25.00% |
| al viro | al viro | 1 | 1.23% | 1 | 25.00% |
| Total | 81 | 100.00% | 4 | 100.00% |
static int i810i2c_getscl(void *data)
{
struct i810fb_i2c_chan *chan = data;
struct i810fb_par *par = chan->par;
u8 __iomem *mmio = par->mmio_start_virtual;
i810_writel(mmio, chan->ddc_base, SCL_DIR_MASK);
i810_writel(mmio, chan->ddc_base, 0);
return ((i810_readl(mmio, chan->ddc_base) & SCL_VAL_IN) != 0);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| antonino daplas | antonino daplas | 74 | 98.67% | 2 | 66.67% |
| al viro | al viro | 1 | 1.33% | 1 | 33.33% |
| Total | 75 | 100.00% | 3 | 100.00% |
static int i810i2c_getsda(void *data)
{
struct i810fb_i2c_chan *chan = data;
struct i810fb_par *par = chan->par;
u8 __iomem *mmio = par->mmio_start_virtual;
i810_writel(mmio, chan->ddc_base, SDA_DIR_MASK);
i810_writel(mmio, chan->ddc_base, 0);
return ((i810_readl(mmio, chan->ddc_base) & SDA_VAL_IN) != 0);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| antonino daplas | antonino daplas | 74 | 98.67% | 2 | 66.67% |
| al viro | al viro | 1 | 1.33% | 1 | 33.33% |
| Total | 75 | 100.00% | 3 | 100.00% |
static int i810_setup_i2c_bus(struct i810fb_i2c_chan *chan, const char *name)
{
int rc;
strcpy(chan->adapter.name, name);
chan->adapter.owner = THIS_MODULE;
chan->adapter.algo_data = &chan->algo;
chan->adapter.dev.parent = &chan->par->dev->dev;
chan->algo.setsda = i810i2c_setsda;
chan->algo.setscl = i810i2c_setscl;
chan->algo.getsda = i810i2c_getsda;
chan->algo.getscl = i810i2c_getscl;
chan->algo.udelay = 10;
chan->algo.timeout = (HZ/2);
chan->algo.data = chan;
i2c_set_adapdata(&chan->adapter, chan);
/* Raise SCL and SDA */
chan->algo.setsda(chan, 1);
chan->algo.setscl(chan, 1);
udelay(20);
rc = i2c_bit_add_bus(&chan->adapter);
if (rc == 0)
dev_dbg(&chan->par->dev->dev, "I2C bus %s registered.\n",name);
else {
dev_warn(&chan->par->dev->dev, "Failed to register I2C bus "
"%s.\n", name);
chan->par = NULL;
}
return rc;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| antonino daplas | antonino daplas | 225 | 100.00% | 2 | 100.00% |
| Total | 225 | 100.00% | 2 | 100.00% |
void i810_create_i2c_busses(struct i810fb_par *par)
{
par->chan[0].par = par;
par->chan[1].par = par;
par->chan[2].par = par;
par->chan[0].ddc_base = GPIOA;
i810_setup_i2c_bus(&par->chan[0], "I810-DDC");
par->chan[1].ddc_base = GPIOB;
i810_setup_i2c_bus(&par->chan[1], "I810-I2C");
par->chan[2].ddc_base = GPIOC;
i810_setup_i2c_bus(&par->chan[2], "I810-GPIOC");
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| antonino daplas | antonino daplas | 115 | 100.00% | 2 | 100.00% |
| Total | 115 | 100.00% | 2 | 100.00% |
void i810_delete_i2c_busses(struct i810fb_par *par)
{
if (par->chan[0].par)
i2c_del_adapter(&par->chan[0].adapter);
par->chan[0].par = NULL;
if (par->chan[1].par)
i2c_del_adapter(&par->chan[1].adapter);
par->chan[1].par = NULL;
if (par->chan[2].par)
i2c_del_adapter(&par->chan[2].adapter);
par->chan[2].par = NULL;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| antonino daplas | antonino daplas | 112 | 97.39% | 2 | 66.67% |
| jean delvare | jean delvare | 3 | 2.61% | 1 | 33.33% |
| Total | 115 | 100.00% | 3 | 100.00% |
int i810_probe_i2c_connector(struct fb_info *info, u8 **out_edid, int conn)
{
struct i810fb_par *par = info->par;
u8 *edid = NULL;
DPRINTK("i810-i2c: Probe DDC%i Bus\n", conn+1);
if (conn < par->ddc_num) {
edid = fb_ddc_read(&par->chan[conn].adapter);
} else {
const u8 *e = fb_firmware_edid(info->device);
if (e != NULL) {
DPRINTK("i810-i2c: Getting EDID from BIOS\n");
edid = kmemdup(e, EDID_LENGTH, GFP_KERNEL);
}
}
*out_edid = edid;
return (edid) ? 0 : 1;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| antonino daplas | antonino daplas | 112 | 93.33% | 3 | 60.00% |
| manuel lauss | manuel lauss | 5 | 4.17% | 1 | 20.00% |
| alexey dobriyan | alexey dobriyan | 3 | 2.50% | 1 | 20.00% |
| Total | 120 | 100.00% | 5 | 100.00% |
Overall Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| antonino daplas | antonino daplas | 934 | 94.44% | 3 | 30.00% |
| stefani seibold | stefani seibold | 34 | 3.44% | 1 | 10.00% |
| manuel lauss | manuel lauss | 5 | 0.51% | 1 | 10.00% |
| al viro | al viro | 4 | 0.40% | 1 | 10.00% |
| adrian bunk | adrian bunk | 3 | 0.30% | 1 | 10.00% |
| tejun heo | tejun heo | 3 | 0.30% | 1 | 10.00% |
| jean delvare | jean delvare | 3 | 0.30% | 1 | 10.00% |
| alexey dobriyan | alexey dobriyan | 3 | 0.30% | 1 | 10.00% |
| Total | 989 | 100.00% | 10 | 100.00% |
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