2005-04-16 16:20:36 -06:00
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/*
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* linux/drivers/video/savage/savagefb-i2c.c - S3 Savage DDC2
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*
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* Copyright 2004 Antonino A. Daplas <adaplas @pol.net>
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*
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* Based partly on rivafb-i2c.c
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*
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* This file is subject to the terms and conditions of the GNU General Public
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* License. See the file COPYING in the main directory of this archive
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* for more details.
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*/
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#include <linux/module.h>
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#include <linux/kernel.h>
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#include <linux/delay.h>
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include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h
percpu.h is included by sched.h and module.h and thus ends up being
included when building most .c files. percpu.h includes slab.h which
in turn includes gfp.h making everything defined by the two files
universally available and complicating inclusion dependencies.
percpu.h -> slab.h dependency is about to be removed. Prepare for
this change by updating users of gfp and slab facilities include those
headers directly instead of assuming availability. As this conversion
needs to touch large number of source files, the following script is
used as the basis of conversion.
http://userweb.kernel.org/~tj/misc/slabh-sweep.py
The script does the followings.
* Scan files for gfp and slab usages and update includes such that
only the necessary includes are there. ie. if only gfp is used,
gfp.h, if slab is used, slab.h.
* When the script inserts a new include, it looks at the include
blocks and try to put the new include such that its order conforms
to its surrounding. It's put in the include block which contains
core kernel includes, in the same order that the rest are ordered -
alphabetical, Christmas tree, rev-Xmas-tree or at the end if there
doesn't seem to be any matching order.
* If the script can't find a place to put a new include (mostly
because the file doesn't have fitting include block), it prints out
an error message indicating which .h file needs to be added to the
file.
The conversion was done in the following steps.
1. The initial automatic conversion of all .c files updated slightly
over 4000 files, deleting around 700 includes and adding ~480 gfp.h
and ~3000 slab.h inclusions. The script emitted errors for ~400
files.
2. Each error was manually checked. Some didn't need the inclusion,
some needed manual addition while adding it to implementation .h or
embedding .c file was more appropriate for others. This step added
inclusions to around 150 files.
3. The script was run again and the output was compared to the edits
from #2 to make sure no file was left behind.
4. Several build tests were done and a couple of problems were fixed.
e.g. lib/decompress_*.c used malloc/free() wrappers around slab
APIs requiring slab.h to be added manually.
5. The script was run on all .h files but without automatically
editing them as sprinkling gfp.h and slab.h inclusions around .h
files could easily lead to inclusion dependency hell. Most gfp.h
inclusion directives were ignored as stuff from gfp.h was usually
wildly available and often used in preprocessor macros. Each
slab.h inclusion directive was examined and added manually as
necessary.
6. percpu.h was updated not to include slab.h.
7. Build test were done on the following configurations and failures
were fixed. CONFIG_GCOV_KERNEL was turned off for all tests (as my
distributed build env didn't work with gcov compiles) and a few
more options had to be turned off depending on archs to make things
build (like ipr on powerpc/64 which failed due to missing writeq).
* x86 and x86_64 UP and SMP allmodconfig and a custom test config.
* powerpc and powerpc64 SMP allmodconfig
* sparc and sparc64 SMP allmodconfig
* ia64 SMP allmodconfig
* s390 SMP allmodconfig
* alpha SMP allmodconfig
* um on x86_64 SMP allmodconfig
8. percpu.h modifications were reverted so that it could be applied as
a separate patch and serve as bisection point.
Given the fact that I had only a couple of failures from tests on step
6, I'm fairly confident about the coverage of this conversion patch.
If there is a breakage, it's likely to be something in one of the arch
headers which should be easily discoverable easily on most builds of
the specific arch.
Signed-off-by: Tejun Heo <tj@kernel.org>
Guess-its-ok-by: Christoph Lameter <cl@linux-foundation.org>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Lee Schermerhorn <Lee.Schermerhorn@hp.com>
2010-03-24 02:04:11 -06:00
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#include <linux/gfp.h>
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2005-04-16 16:20:36 -06:00
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#include <linux/pci.h>
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#include <linux/fb.h>
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#include <asm/io.h>
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#include "savagefb.h"
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#define SAVAGE_DDC 0x50
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#define VGA_CR_IX 0x3d4
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#define VGA_CR_DATA 0x3d5
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#define CR_SERIAL1 0xa0 /* I2C serial communications interface */
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#define MM_SERIAL1 0xff20
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#define CR_SERIAL2 0xb1 /* DDC2 monitor communications interface */
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/* based on vt8365 documentation */
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#define PROSAVAGE_I2C_ENAB 0x10
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#define PROSAVAGE_I2C_SCL_OUT 0x01
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#define PROSAVAGE_I2C_SDA_OUT 0x02
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#define PROSAVAGE_I2C_SCL_IN 0x04
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#define PROSAVAGE_I2C_SDA_IN 0x08
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#define SAVAGE4_I2C_ENAB 0x00000020
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#define SAVAGE4_I2C_SCL_OUT 0x00000001
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#define SAVAGE4_I2C_SDA_OUT 0x00000002
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#define SAVAGE4_I2C_SCL_IN 0x00000008
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#define SAVAGE4_I2C_SDA_IN 0x00000010
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static void savage4_gpio_setscl(void *data, int val)
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{
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2006-01-09 21:53:02 -07:00
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struct savagefb_i2c_chan *chan = data;
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2005-04-16 16:20:36 -06:00
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unsigned int r;
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r = readl(chan->ioaddr + chan->reg);
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if(val)
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r |= SAVAGE4_I2C_SCL_OUT;
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else
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r &= ~SAVAGE4_I2C_SCL_OUT;
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writel(r, chan->ioaddr + chan->reg);
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readl(chan->ioaddr + chan->reg); /* flush posted write */
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}
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static void savage4_gpio_setsda(void *data, int val)
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{
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2006-01-09 21:53:02 -07:00
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struct savagefb_i2c_chan *chan = data;
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2005-04-16 16:20:36 -06:00
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unsigned int r;
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r = readl(chan->ioaddr + chan->reg);
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if(val)
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r |= SAVAGE4_I2C_SDA_OUT;
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else
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r &= ~SAVAGE4_I2C_SDA_OUT;
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writel(r, chan->ioaddr + chan->reg);
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readl(chan->ioaddr + chan->reg); /* flush posted write */
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}
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static int savage4_gpio_getscl(void *data)
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{
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2006-01-09 21:53:02 -07:00
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struct savagefb_i2c_chan *chan = data;
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2005-04-16 16:20:36 -06:00
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return (0 != (readl(chan->ioaddr + chan->reg) & SAVAGE4_I2C_SCL_IN));
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}
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static int savage4_gpio_getsda(void *data)
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{
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2006-01-09 21:53:02 -07:00
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struct savagefb_i2c_chan *chan = data;
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2005-04-16 16:20:36 -06:00
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return (0 != (readl(chan->ioaddr + chan->reg) & SAVAGE4_I2C_SDA_IN));
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}
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static void prosavage_gpio_setscl(void* data, int val)
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{
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2006-01-09 21:53:02 -07:00
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struct savagefb_i2c_chan *chan = data;
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2005-04-16 16:20:36 -06:00
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u32 r;
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2007-05-08 01:38:34 -06:00
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r = VGArCR(chan->reg, chan->par);
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2005-04-16 16:20:36 -06:00
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r |= PROSAVAGE_I2C_ENAB;
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if (val) {
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r |= PROSAVAGE_I2C_SCL_OUT;
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} else {
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r &= ~PROSAVAGE_I2C_SCL_OUT;
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}
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2007-05-08 01:38:34 -06:00
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VGAwCR(chan->reg, r, chan->par);
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2005-04-16 16:20:36 -06:00
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}
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static void prosavage_gpio_setsda(void* data, int val)
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{
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2006-01-09 21:53:02 -07:00
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struct savagefb_i2c_chan *chan = data;
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2005-04-16 16:20:36 -06:00
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unsigned int r;
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2007-05-08 01:38:34 -06:00
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r = VGArCR(chan->reg, chan->par);
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2005-04-16 16:20:36 -06:00
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r |= PROSAVAGE_I2C_ENAB;
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if (val) {
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r |= PROSAVAGE_I2C_SDA_OUT;
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} else {
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r &= ~PROSAVAGE_I2C_SDA_OUT;
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}
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2007-05-08 01:38:34 -06:00
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VGAwCR(chan->reg, r, chan->par);
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2005-04-16 16:20:36 -06:00
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}
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static int prosavage_gpio_getscl(void* data)
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{
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2006-01-09 21:53:02 -07:00
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struct savagefb_i2c_chan *chan = data;
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2005-04-16 16:20:36 -06:00
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2007-05-08 01:38:34 -06:00
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return (VGArCR(chan->reg, chan->par) & PROSAVAGE_I2C_SCL_IN) ? 1 : 0;
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2005-04-16 16:20:36 -06:00
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}
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static int prosavage_gpio_getsda(void* data)
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{
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2006-01-09 21:53:02 -07:00
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struct savagefb_i2c_chan *chan = data;
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2005-04-16 16:20:36 -06:00
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2007-05-08 01:38:34 -06:00
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return (VGArCR(chan->reg, chan->par) & PROSAVAGE_I2C_SDA_IN) ? 1 : 0;
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2005-04-16 16:20:36 -06:00
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}
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static int savage_setup_i2c_bus(struct savagefb_i2c_chan *chan,
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const char *name)
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{
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int rc = 0;
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2006-01-09 21:53:02 -07:00
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if (chan->par) {
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2005-04-16 16:20:36 -06:00
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strcpy(chan->adapter.name, name);
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chan->adapter.owner = THIS_MODULE;
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chan->adapter.algo_data = &chan->algo;
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chan->adapter.dev.parent = &chan->par->pcidev->dev;
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2008-04-28 03:15:16 -06:00
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chan->algo.udelay = 10;
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2005-04-16 16:20:36 -06:00
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chan->algo.timeout = 20;
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chan->algo.data = chan;
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i2c_set_adapdata(&chan->adapter, chan);
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/* Raise SCL and SDA */
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chan->algo.setsda(chan, 1);
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chan->algo.setscl(chan, 1);
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udelay(20);
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2006-01-09 21:53:02 -07:00
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rc = i2c_bit_add_bus(&chan->adapter);
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2005-04-16 16:20:36 -06:00
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if (rc == 0)
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dev_dbg(&chan->par->pcidev->dev,
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"I2C bus %s registered.\n", name);
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else
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dev_warn(&chan->par->pcidev->dev,
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"Failed to register I2C bus %s.\n", name);
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2011-04-03 06:54:06 -06:00
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}
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2005-04-16 16:20:36 -06:00
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return rc;
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}
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void savagefb_create_i2c_busses(struct fb_info *info)
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{
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2006-01-09 21:53:02 -07:00
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struct savagefb_par *par = info->par;
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2005-04-16 16:20:36 -06:00
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par->chan.par = par;
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2011-04-03 06:54:05 -06:00
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switch (par->chip) {
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case S3_PROSAVAGE:
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2011-04-10 14:57:34 -06:00
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case S3_PROSAVAGEDDR:
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case S3_TWISTER:
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2005-04-16 16:20:36 -06:00
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par->chan.reg = CR_SERIAL2;
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par->chan.ioaddr = par->mmio.vbase;
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par->chan.algo.setsda = prosavage_gpio_setsda;
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par->chan.algo.setscl = prosavage_gpio_setscl;
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par->chan.algo.getsda = prosavage_gpio_getsda;
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par->chan.algo.getscl = prosavage_gpio_getscl;
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break;
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2011-04-03 06:54:05 -06:00
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case S3_SAVAGE4:
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2010-10-27 16:33:25 -06:00
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par->chan.reg = CR_SERIAL1;
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if (par->pcidev->revision > 1 && !(VGArCR(0xa6, par) & 0x40))
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par->chan.reg = CR_SERIAL2;
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par->chan.ioaddr = par->mmio.vbase;
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par->chan.algo.setsda = prosavage_gpio_setsda;
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par->chan.algo.setscl = prosavage_gpio_setscl;
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par->chan.algo.getsda = prosavage_gpio_getsda;
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par->chan.algo.getscl = prosavage_gpio_getscl;
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break;
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2011-04-03 06:54:05 -06:00
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case S3_SAVAGE2000:
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2011-04-03 06:54:04 -06:00
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par->chan.reg = MM_SERIAL1;
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2005-04-16 16:20:36 -06:00
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par->chan.ioaddr = par->mmio.vbase;
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par->chan.algo.setsda = savage4_gpio_setsda;
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par->chan.algo.setscl = savage4_gpio_setscl;
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par->chan.algo.getsda = savage4_gpio_getsda;
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par->chan.algo.getscl = savage4_gpio_getscl;
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break;
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default:
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par->chan.par = NULL;
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}
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savage_setup_i2c_bus(&par->chan, "SAVAGE DDC2");
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}
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void savagefb_delete_i2c_busses(struct fb_info *info)
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{
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2006-01-09 21:53:02 -07:00
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struct savagefb_par *par = info->par;
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2005-04-16 16:20:36 -06:00
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2006-01-09 21:53:02 -07:00
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if (par->chan.par)
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2006-12-10 13:21:33 -07:00
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i2c_del_adapter(&par->chan.adapter);
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2005-04-16 16:20:36 -06:00
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par->chan.par = NULL;
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}
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2005-09-09 14:04:35 -06:00
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int savagefb_probe_i2c_connector(struct fb_info *info, u8 **out_edid)
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2005-04-16 16:20:36 -06:00
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{
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2005-09-09 14:04:35 -06:00
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struct savagefb_par *par = info->par;
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2006-10-03 02:14:45 -06:00
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u8 *edid;
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if (par->chan.par)
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edid = fb_ddc_read(&par->chan.adapter);
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else
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edid = NULL;
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2005-09-09 14:04:35 -06:00
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if (!edid) {
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/* try to get from firmware */
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2005-09-15 06:58:57 -06:00
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const u8 *e = fb_firmware_edid(info->device);
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2006-12-08 03:40:46 -07:00
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if (e)
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edid = kmemdup(e, EDID_LENGTH, GFP_KERNEL);
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2005-09-09 14:04:35 -06:00
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}
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2006-03-27 02:17:34 -07:00
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*out_edid = edid;
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2005-04-16 16:20:36 -06:00
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2005-09-09 14:04:35 -06:00
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return (edid) ? 0 : 1;
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2005-04-16 16:20:36 -06:00
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}
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MODULE_LICENSE("GPL");
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