/*
 * 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/gfp.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;

	val = NVReadCrtc(par, chan->ddc_base + 1) & 0xf0;

	if (state)
		val |= 0x20;
	else
		val &= ~0x20;

	NVWriteCrtc(par, chan->ddc_base + 1, val | 0x01);
}

static void nvidia_gpio_setsda(void *data, int state)
{
	struct nvidia_i2c_chan *chan = data;
	struct nvidia_par *par = chan->par;
	u32 val;

	val = NVReadCrtc(par, chan->ddc_base + 1) & 0xf0;

	if (state)
		val |= 0x10;
	else
		val &= ~0x10;

	NVWriteCrtc(par, chan->ddc_base + 1, val | 0x01);
}

static int nvidia_gpio_getscl(void *data)
{
	struct nvidia_i2c_chan *chan = data;
	struct nvidia_par *par = chan->par;
	u32 val = 0;

	if (NVReadCrtc(par, chan->ddc_base) & 0x04)
		val = 1;

	return val;
}

static int nvidia_gpio_getsda(void *data)
{
	struct nvidia_i2c_chan *chan = data;
	struct nvidia_par *par = chan->par;
	u32 val = 0;

	if (NVReadCrtc(par, chan->ddc_base) & 0x08)
		val = 1;

	return val;
}

static int nvidia_setup_i2c_bus(struct nvidia_i2c_chan *chan, const char *name,
				unsigned int i2c_class)
{
	int rc;

	strcpy(chan->adapter.name, name);
	chan->adapter.owner = THIS_MODULE;
	chan->adapter.class = i2c_class;
	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->chan[0].par = par;
	par->chan[1].par = par;
	par->chan[2].par = par;

	par->chan[0].ddc_base = (par->reverse_i2c) ? 0x36 : 0x3e;
 	nvidia_setup_i2c_bus(&par->chan[0], "nvidia #0",
			     (par->reverse_i2c) ? I2C_CLASS_HWMON : 0);

	par->chan[1].ddc_base = (par->reverse_i2c) ? 0x3e : 0x36;
 	nvidia_setup_i2c_bus(&par->chan[1], "nvidia #1",
			     (par->reverse_i2c) ? 0 : I2C_CLASS_HWMON);

	par->chan[2].ddc_base = 0x50;
 	nvidia_setup_i2c_bus(&par->chan[2], "nvidia #2", 0);
}

void nvidia_delete_i2c_busses(struct nvidia_par *par)
{
	int i;

	for (i = 0; i < 3; i++) {
		if (!par->chan[i].par)
			continue;
		i2c_del_adapter(&par->chan[i].adapter);
		par->chan[i].par = NULL;
	}
}

int nvidia_probe_i2c_connector(struct fb_info *info, int conn, u8 **out_edid)
{
	struct nvidia_par *par = info->par;
	u8 *edid = NULL;

	if (par->chan[conn - 1].par)
		edid = fb_ddc_read(&par->chan[conn - 1].adapter);

	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;
}
3c9d2b15542e9a99727c0ef43a7f&amp;showmsg=1'>Expand</a>)</th><th class='left'>Author</th><th class='left'>Files</th><th class='left'>Lines</th></tr>
lect></td></tr><tr><td class='label'>mode:</td><td class='ctrl'><select name='dt' onchange='this.form.submit();'><option value='0' selected='selected'>unified</option><option value='1'>ssdiff</option><option value='2'>stat only</option></select></td></tr><tr><td/><td class='ctrl'><noscript><input type='submit' value='reload'/></noscript></td></tr></table></form></div><table summary='commit info' class='commit-info'>
<tr><th>author</th><td>Linus Torvalds &lt;torvalds@linux-foundation.org&gt;</td><td class='right'>2016-12-25 14:01:28 -0800</td></tr>
<tr><th>committer</th><td>Linus Torvalds &lt;torvalds@linux-foundation.org&gt;</td><td class='right'>2016-12-25 14:01:28 -0800</td></tr>
<tr><th>commit</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/net/9p?id=10bbe7599e2755d3f3e100103967788b8b5a4bce'>10bbe7599e2755d3f3e100103967788b8b5a4bce</a> (<a href='/cgit.cgi/linux/net-next.git/patch/net/9p?id=10bbe7599e2755d3f3e100103967788b8b5a4bce'>patch</a>)</td></tr>
<tr><th>tree</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/tree/?id=10bbe7599e2755d3f3e100103967788b8b5a4bce'>f4d5bc444584dc211c5797be5aad5e861c9181b3</a> /<a href='/cgit.cgi/linux/net-next.git/tree/net/9p?id=10bbe7599e2755d3f3e100103967788b8b5a4bce'>net/9p</a></td></tr>
<tr><th>parent</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/net/9p?id=62906027091f1d02de44041524f0769f60bb9cf3'>62906027091f1d02de44041524f0769f60bb9cf3</a> (<a href='/cgit.cgi/linux/net-next.git/diff/net/9p?id=10bbe7599e2755d3f3e100103967788b8b5a4bce&amp;id2=62906027091f1d02de44041524f0769f60bb9cf3'>diff</a>)</td></tr><tr><th>parent</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/net/9p?id=6886fee4d7a3afaf905a8e0bec62dc8fdc39878d'>6886fee4d7a3afaf905a8e0bec62dc8fdc39878d</a> (<a href='/cgit.cgi/linux/net-next.git/diff/net/9p?id=10bbe7599e2755d3f3e100103967788b8b5a4bce&amp;id2=6886fee4d7a3afaf905a8e0bec62dc8fdc39878d'>diff</a>)</td></tr></table>
<div class='commit-subject'>Merge branch 'turbostat' of git://git.kernel.org/pub/scm/linux/kernel/git/lenb/linux</div><div class='commit-msg'>Pull turbostat updates from Len Brown.

* 'turbostat' of git://git.kernel.org/pub/scm/linux/kernel/git/lenb/linux:
  tools/power turbostat: remove obsolete -M, -m, -C, -c options
  tools/power turbostat: Make extensible via the --add parameter
  tools/power turbostat: Denverton uses a 25 MHz crystal, not 19.2 MHz
  tools/power turbostat: line up headers when -M is used
  tools/power turbostat: fix SKX PKG_CSTATE_LIMIT decoding
  tools/power turbostat: Support Knights Mill (KNM)
  tools/power turbostat: Display HWP OOB status
  tools/power turbostat: fix Denverton BCLK
  tools/power turbostat: use intel-family.h model strings
  tools/power/turbostat: Add Denverton RAPL support
  tools/power/turbostat: Add Denverton support
  tools/power/turbostat: split core MSR support into status + limit
  tools/power turbostat: fix error case overflow read of slm_freq_table[]
  tools/power turbostat: Allocate correct amount of fd and irq entries
  tools/power turbostat: switch to tab delimited output
  tools/power turbostat: Gracefully handle ACPI S3
  tools/power turbostat: tidy up output on Joule counter overflow
</div><div class='diffstat-header'><a href='/cgit.cgi/linux/net-next.git/diff/?id=10bbe7599e2755d3f3e100103967788b8b5a4bce'>Diffstat</a> (limited to 'net/9p')</div><table summary='diffstat' class='diffstat'>