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Diffstat (limited to 'linux-core/intel_i2c.c')
-rw-r--r--linux-core/intel_i2c.c190
1 files changed, 0 insertions, 190 deletions
diff --git a/linux-core/intel_i2c.c b/linux-core/intel_i2c.c
deleted file mode 100644
index efcbf656..00000000
--- a/linux-core/intel_i2c.c
+++ /dev/null
@@ -1,190 +0,0 @@
-/*
- * Copyright © 2006-2007 Intel Corporation
- *
- * Permission is hereby granted, free of charge, to any person obtaining a
- * copy of this software and associated documentation files (the "Software"),
- * to deal in the Software without restriction, including without limitation
- * the rights to use, copy, modify, merge, publish, distribute, sublicense,
- * and/or sell copies of the Software, and to permit persons to whom the
- * Software is furnished to do so, subject to the following conditions:
- *
- * The above copyright notice and this permission notice (including the next
- * paragraph) shall be included in all copies or substantial portions of the
- * Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
- * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
- * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
- * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
- * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
- * DEALINGS IN THE SOFTWARE.
- *
- * Authors:
- * Eric Anholt <eric@anholt.net>
- */
-/*
- * Copyright (c) 2006 Dave Airlie <airlied@linux.ie>
- * Jesse Barnes <jesse.barnes@intel.com>
- */
-
-#include <linux/i2c.h>
-#include <linux/i2c-id.h>
-#include <linux/i2c-algo-bit.h>
-#include "drmP.h"
-#include "drm.h"
-#include "intel_drv.h"
-#include "i915_drm.h"
-#include "i915_drv.h"
-
-/*
- * Intel GPIO access functions
- */
-
-#define I2C_RISEFALL_TIME 20
-
-static int get_clock(void *data)
-{
- struct intel_i2c_chan *chan = data;
- struct drm_i915_private *dev_priv = chan->drm_dev->dev_private;
- u32 val;
-
- val = I915_READ(chan->reg);
- return ((val & GPIO_CLOCK_VAL_IN) != 0);
-}
-
-static int get_data(void *data)
-{
- struct intel_i2c_chan *chan = data;
- struct drm_i915_private *dev_priv = chan->drm_dev->dev_private;
- u32 val;
-
- val = I915_READ(chan->reg);
- return ((val & GPIO_DATA_VAL_IN) != 0);
-}
-
-static void set_clock(void *data, int state_high)
-{
- struct intel_i2c_chan *chan = data;
- struct drm_device *dev = chan->drm_dev;
- struct drm_i915_private *dev_priv = chan->drm_dev->dev_private;
- u32 reserved = 0, clock_bits;
-
- /* On most chips, these bits must be preserved in software. */
- if (!IS_I830(dev) && !IS_845G(dev))
- reserved = I915_READ(chan->reg) & (GPIO_DATA_PULLUP_DISABLE |
- GPIO_CLOCK_PULLUP_DISABLE);
-
- if (state_high)
- clock_bits = GPIO_CLOCK_DIR_IN | GPIO_CLOCK_DIR_MASK;
- else
- clock_bits = GPIO_CLOCK_DIR_OUT | GPIO_CLOCK_DIR_MASK |
- GPIO_CLOCK_VAL_MASK;
- I915_WRITE(chan->reg, reserved | clock_bits);
- udelay(I2C_RISEFALL_TIME); /* wait for the line to change state */
-}
-
-static void set_data(void *data, int state_high)
-{
- struct intel_i2c_chan *chan = data;
- struct drm_device *dev = chan->drm_dev;
- struct drm_i915_private *dev_priv = chan->drm_dev->dev_private;
- u32 reserved = 0, data_bits;
-
- /* On most chips, these bits must be preserved in software. */
- if (!IS_I830(dev) && !IS_845G(dev))
- reserved = I915_READ(chan->reg) & (GPIO_DATA_PULLUP_DISABLE |
- GPIO_CLOCK_PULLUP_DISABLE);
-
- if (state_high)
- data_bits = GPIO_DATA_DIR_IN | GPIO_DATA_DIR_MASK;
- else
- data_bits = GPIO_DATA_DIR_OUT | GPIO_DATA_DIR_MASK |
- GPIO_DATA_VAL_MASK;
-
- I915_WRITE(chan->reg, reserved | data_bits);
- udelay(I2C_RISEFALL_TIME); /* wait for the line to change state */
-}
-
-/**
- * intel_i2c_create - instantiate an Intel i2c bus using the specified GPIO reg
- * @dev: DRM device
- * @output: driver specific output device
- * @reg: GPIO reg to use
- * @name: name for this bus
- *
- * Creates and registers a new i2c bus with the Linux i2c layer, for use
- * in output probing and control (e.g. DDC or SDVO control functions).
- *
- * Possible values for @reg include:
- * %GPIOA
- * %GPIOB
- * %GPIOC
- * %GPIOD
- * %GPIOE
- * %GPIOF
- * %GPIOG
- * %GPIOH
- * see PRM for details on how these different busses are used.
- */
-struct intel_i2c_chan *intel_i2c_create(struct drm_device *dev, const u32 reg,
- const char *name)
-{
- struct intel_i2c_chan *chan;
-
- chan = kzalloc(sizeof(struct intel_i2c_chan), GFP_KERNEL);
- if (!chan)
- goto out_free;
-
- chan->drm_dev = dev;
- chan->reg = reg;
- snprintf(chan->adapter.name, I2C_NAME_SIZE, "intel drm %s", name);
- chan->adapter.owner = THIS_MODULE;
-#ifndef I2C_HW_B_INTELFB
-#define I2C_HW_B_INTELFB I2C_HW_B_I810
-#endif
- chan->adapter.id = I2C_HW_B_INTELFB;
- chan->adapter.algo_data = &chan->algo;
- chan->adapter.dev.parent = &dev->pdev->dev;
- chan->algo.setsda = set_data;
- chan->algo.setscl = set_clock;
- chan->algo.getsda = get_data;
- chan->algo.getscl = get_clock;
- chan->algo.udelay = 20;
- chan->algo.timeout = usecs_to_jiffies(2200);
- chan->algo.data = chan;
-
- i2c_set_adapdata(&chan->adapter, chan);
-
- if(i2c_bit_add_bus(&chan->adapter))
- goto out_free;
-
- /* JJJ: raise SCL and SDA? */
- set_data(chan, 1);
- set_clock(chan, 1);
- udelay(20);
-
- return chan;
-
-out_free:
- kfree(chan);
- return NULL;
-}
-
-/**
- * intel_i2c_destroy - unregister and free i2c bus resources
- * @output: channel to free
- *
- * Unregister the adapter from the i2c layer, then free the structure.
- */
-void intel_i2c_destroy(struct intel_i2c_chan *chan)
-{
- if (!chan)
- return;
-
- i2c_del_adapter(&chan->adapter);
- kfree(chan);
-}
-
-
-