linux/drivers/video/nvidia/nv_i2c.c
Tim Schmielau cd354f1ae7 [PATCH] remove many unneeded #includes of sched.h
After Al Viro (finally) succeeded in removing the sched.h #include in module.h
recently, it makes sense again to remove other superfluous sched.h includes.
There are quite a lot of files which include it but don't actually need
anything defined in there.  Presumably these includes were once needed for
macros that used to live in sched.h, but moved to other header files in the
course of cleaning it up.

To ease the pain, this time I did not fiddle with any header files and only
removed #includes from .c-files, which tend to cause less trouble.

Compile tested against 2.6.20-rc2 and 2.6.20-rc2-mm2 (with offsets) on alpha,
arm, i386, ia64, mips, powerpc, and x86_64 with allnoconfig, defconfig,
allmodconfig, and allyesconfig as well as a few randconfigs on x86_64 and all
configs in arch/arm/configs on arm.  I also checked that no new warnings were
introduced by the patch (actually, some warnings are removed that were emitted
by unnecessarily included header files).

Signed-off-by: Tim Schmielau <tim@physik3.uni-rostock.de>
Acked-by: Russell King <rmk+kernel@arm.linux.org.uk>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-02-14 08:09:54 -08:00

220 lines
4.5 KiB
C

/*
* linux/drivers/video/nvidia/nvidia-i2c.c - nVidia i2c
*
* Copyright 2004 Antonino A. Daplas <adaplas @pol.net>
*
* Based on rivafb-i2c.c
*
* 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/pci.h>
#include <linux/fb.h>
#include <asm/io.h>
#include "nv_type.h"
#include "nv_local.h"
#include "nv_proto.h"
#include "../edid.h"
static void nvidia_gpio_setscl(void *data, int state)
{
struct nvidia_i2c_chan *chan = data;
struct nvidia_par *par = chan->par;
u32 val;
VGA_WR08(par->PCIO, 0x3d4, chan->ddc_base + 1);
val = VGA_RD08(par->PCIO, 0x3d5) & 0xf0;
if (state)
val |= 0x20;
else
val &= ~0x20;
VGA_WR08(par->PCIO, 0x3d4, chan->ddc_base + 1);
VGA_WR08(par->PCIO, 0x3d5, val | 0x1);
}
static void nvidia_gpio_setsda(void *data, int state)
{
struct nvidia_i2c_chan *chan = data;
struct nvidia_par *par = chan->par;
u32 val;
VGA_WR08(par->PCIO, 0x3d4, chan->ddc_base + 1);
val = VGA_RD08(par->PCIO, 0x3d5) & 0xf0;
if (state)
val |= 0x10;
else
val &= ~0x10;
VGA_WR08(par->PCIO, 0x3d4, chan->ddc_base + 1);
VGA_WR08(par->PCIO, 0x3d5, val | 0x1);
}
static int nvidia_gpio_getscl(void *data)
{
struct nvidia_i2c_chan *chan = data;
struct nvidia_par *par = chan->par;
u32 val = 0;
VGA_WR08(par->PCIO, 0x3d4, chan->ddc_base);
if (VGA_RD08(par->PCIO, 0x3d5) & 0x04)
val = 1;
val = VGA_RD08(par->PCIO, 0x3d5);
return val;
}
static int nvidia_gpio_getsda(void *data)
{
struct nvidia_i2c_chan *chan = data;
struct nvidia_par *par = chan->par;
u32 val = 0;
VGA_WR08(par->PCIO, 0x3d4, chan->ddc_base);
if (VGA_RD08(par->PCIO, 0x3d5) & 0x08)
val = 1;
return val;
}
static int nvidia_setup_i2c_bus(struct nvidia_i2c_chan *chan, const char *name)
{
int rc;
strcpy(chan->adapter.name, name);
chan->adapter.owner = THIS_MODULE;
chan->adapter.id = I2C_HW_B_NVIDIA;
chan->adapter.algo_data = &chan->algo;
chan->adapter.dev.parent = &chan->par->pci_dev->dev;
chan->algo.setsda = nvidia_gpio_setsda;
chan->algo.setscl = nvidia_gpio_setscl;
chan->algo.getsda = nvidia_gpio_getsda;
chan->algo.getscl = nvidia_gpio_getscl;
chan->algo.udelay = 40;
chan->algo.timeout = msecs_to_jiffies(2);
chan->algo.data = chan;
i2c_set_adapdata(&chan->adapter, chan);
/* Raise SCL and SDA */
nvidia_gpio_setsda(chan, 1);
nvidia_gpio_setscl(chan, 1);
udelay(20);
rc = i2c_bit_add_bus(&chan->adapter);
if (rc == 0)
dev_dbg(&chan->par->pci_dev->dev,
"I2C bus %s registered.\n", name);
else {
dev_warn(&chan->par->pci_dev->dev,
"Failed to register I2C bus %s.\n", name);
chan->par = NULL;
}
return rc;
}
void nvidia_create_i2c_busses(struct nvidia_par *par)
{
par->bus = 3;
par->chan[0].par = par;
par->chan[1].par = par;
par->chan[2].par = par;
par->chan[0].ddc_base = 0x3e;
nvidia_setup_i2c_bus(&par->chan[0], "nvidia #0");
par->chan[1].ddc_base = 0x36;
nvidia_setup_i2c_bus(&par->chan[1], "nvidia #1");
par->chan[2].ddc_base = 0x50;
nvidia_setup_i2c_bus(&par->chan[2], "nvidia #2");
}
void nvidia_delete_i2c_busses(struct nvidia_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;
}
static u8 *nvidia_do_probe_i2c_edid(struct nvidia_i2c_chan *chan)
{
u8 start = 0x0;
struct i2c_msg msgs[] = {
{
.addr = 0x50,
.len = 1,
.buf = &start,
}, {
.addr = 0x50,
.flags = I2C_M_RD,
.len = EDID_LENGTH,
},
};
u8 *buf;
if (!chan->par)
return NULL;
buf = kmalloc(EDID_LENGTH, GFP_KERNEL);
if (!buf) {
dev_warn(&chan->par->pci_dev->dev, "Out of memory!\n");
return NULL;
}
msgs[1].buf = buf;
if (i2c_transfer(&chan->adapter, msgs, 2) == 2)
return buf;
dev_dbg(&chan->par->pci_dev->dev, "Unable to read EDID block.\n");
kfree(buf);
return NULL;
}
int nvidia_probe_i2c_connector(struct fb_info *info, int conn, u8 **out_edid)
{
struct nvidia_par *par = info->par;
u8 *edid = NULL;
int i;
for (i = 0; i < 3; i++) {
/* Do the real work */
edid = nvidia_do_probe_i2c_edid(&par->chan[conn - 1]);
if (edid)
break;
}
if (!edid && conn == 1) {
/* try to get from firmware */
const u8 *e = fb_firmware_edid(info->device);
if (e != NULL)
edid = kmemdup(e, EDID_LENGTH, GFP_KERNEL);
}
*out_edid = edid;
return (edid) ? 0 : 1;
}