Add the two GPL licensed I2C support files.

diff --git a/linux/radeon_gpl.h b/linux/radeon_gpl.h
new file mode 100644 (file)
index 0000000..e8c479a
--- /dev/null
+++ b/linux/radeon_gpl.h
@@ -0,0 +1,29 @@
+/*
+ * linux/radeon_gpl.h
+ *
+ * Original author probably Benjamin Herrenschmidt <benh@kernel.crashing.org>
+ * or Kronos <kronos@kronoz.cjb.net>
+ * Based on Xfree sources
+ * (C) Copyright 2004 Jon Smirl <jonsmirl@gmail.com>
+ *
+ * This is a GPL licensed file from the Linux kernel, don't add it to the BSD build
+ *
+ * Radeon I2C support routines
+ *
+ */
+
+#include <linux/i2c.h>
+#include <linux/i2c-id.h>
+#include <linux/i2c-algo-bit.h>
+
+struct radeon_i2c_chan {
+       drm_device_t                    *dev;
+       u32                             ddc_reg;
+       struct i2c_adapter              adapter;
+       struct i2c_algo_bit_data        algo;
+};
+
+extern int radeon_create_i2c_busses(drm_device_t *dev);
+extern void radeon_delete_i2c_busses(drm_device_t *dev);
+
+ 

diff --git a/linux/radeon_i2c.c b/linux/radeon_i2c.c
new file mode 100644 (file)
index 0000000..a68b9ee
--- /dev/null
+++ b/linux/radeon_i2c.c
@@ -0,0 +1,152 @@
+/*
+ * linux/radeon_i2c.c
+ *
+ * Original author probably Benjamin Herrenschmidt <benh@kernel.crashing.org>
+ * or Kronos <kronos@kronoz.cjb.net>
+ * Based on Xfree sources
+ * (C) Copyright 2004 Jon Smirl <jonsmirl@gmail.com>
+ *
+ * This is a GPL licensed file from the Linux kernel, don't add it to the BSD build
+ *
+ * Radeon I2C support routines
+ *
+ */
+
+#include <linux/config.h>
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/sched.h>
+#include <linux/delay.h>
+#include <linux/pci.h>
+#include <linux/fb.h>
+
+#include <asm/io.h>
+#include <video/radeon.h>
+
+#include "radeon.h"
+#include "drmP.h"
+#include "drm.h"
+#include "radeon_drm.h"
+#include "radeon_drv.h"
+
+static void gpio_setscl(void* data, int state)
+{
+       struct radeon_i2c_chan *chan = data;
+       drm_radeon_private_t *dev_priv = chan->dev->dev_private;
+       u32 val;
+
+       val = RADEON_READ(chan->ddc_reg) & ~(VGA_DDC_CLK_OUT_EN);
+       if (!state)
+               val |= VGA_DDC_CLK_OUT_EN;
+
+       RADEON_WRITE(chan->ddc_reg, val);
+       (void)RADEON_READ(chan->ddc_reg);
+}
+
+static void gpio_setsda(void* data, int state)
+{
+       struct radeon_i2c_chan *chan = data;
+       drm_radeon_private_t *dev_priv = chan->dev->dev_private;
+       u32 val;
+
+       val = RADEON_READ(chan->ddc_reg) & ~(VGA_DDC_DATA_OUT_EN);
+       if (!state)
+               val |= VGA_DDC_DATA_OUT_EN;
+
+       RADEON_WRITE(chan->ddc_reg, val);
+       (void)RADEON_READ(chan->ddc_reg);
+}
+
+static int gpio_getscl(void* data)
+{
+       struct radeon_i2c_chan *chan = data;
+       drm_radeon_private_t *dev_priv = chan->dev->dev_private;
+       u32 val;
+
+       val = RADEON_READ(chan->ddc_reg);
+
+       return (val & VGA_DDC_CLK_INPUT) ? 1 : 0;
+}
+
+static int gpio_getsda(void* data)
+{
+       struct radeon_i2c_chan *chan = data;
+       drm_radeon_private_t *dev_priv = chan->dev->dev_private;
+       u32 val;
+       
+       val = RADEON_READ(chan->ddc_reg);
+
+       return (val & VGA_DDC_DATA_INPUT) ? 1 : 0;
+}
+
+static int setup_i2c_bus(struct radeon_i2c_chan *chan, const char *name)
+{
+       int rc;
+
+       strcpy(chan->adapter.name, name);
+       chan->adapter.owner             = THIS_MODULE;
+       chan->adapter.id                = I2C_ALGO_ATI;
+       chan->adapter.algo_data         = &chan->algo;
+       chan->adapter.dev.parent        = &chan->dev->pdev->dev;
+       chan->algo.setsda               = gpio_setsda;
+       chan->algo.setscl               = gpio_setscl;
+       chan->algo.getsda               = gpio_getsda;
+       chan->algo.getscl               = gpio_getscl;
+       chan->algo.udelay               = 40;
+       chan->algo.timeout              = 20;
+       chan->algo.data                 = chan; 
+
+       i2c_set_adapdata(&chan->adapter, chan);
+
+       /* Raise SCL and SDA */
+       gpio_setsda(chan, 1);
+       gpio_setscl(chan, 1);
+       udelay(20);
+
+       rc = i2c_bit_add_bus(&chan->adapter);
+       if (rc == 0)
+               DRM_DEBUG("I2C bus %s registered.\n", name);
+       else
+               DRM_ERROR("Failed to register I2C bus %s.\n", name);
+       return rc;
+}
+
+int radeon_create_i2c_busses(drm_device_t *dev)
+{
+       drm_radeon_private_t *dev_priv = dev->dev_private;
+       int ret;
+
+       dev_priv->i2c[0].dev = dev;
+       dev_priv->i2c[0].ddc_reg = GPIO_MONID;
+       if ((ret = setup_i2c_bus(&dev_priv->i2c[0], "monid")))
+               return ret;
+
+       dev_priv->i2c[1].dev = dev;
+       dev_priv->i2c[1].ddc_reg = GPIO_DVI_DDC;
+       if ((ret = setup_i2c_bus(&dev_priv->i2c[1], "dvi")))
+               return ret;
+
+       dev_priv->i2c[2].dev = dev;
+       dev_priv->i2c[2].ddc_reg = GPIO_VGA_DDC;
+       if ((ret = setup_i2c_bus(&dev_priv->i2c[2], "vga")))
+               return ret;
+
+       dev_priv->i2c[3].dev = dev;
+       dev_priv->i2c[3].ddc_reg = GPIO_CRT2_DDC;
+       if ((ret = setup_i2c_bus(&dev_priv->i2c[3], "crt2")))
+               return ret;
+       return 0;
+}
+
+void radeon_delete_i2c_busses(drm_device_t *dev)
+{
+       drm_radeon_private_t *dev_priv = dev->dev_private;
+       int i, ret;
+       
+       for (i = 0; i < 4; i++) {
+               if (dev_priv->i2c[i].dev) {
+                       ret = i2c_bit_del_bus(&dev_priv->i2c[i].adapter);
+               }
+               dev_priv->i2c[i].dev = NULL;
+       }
+}