Linux-2.6.12-rc2v2.6.12-rc2

Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.

Let it rip!

1 files changed, 265 insertions, 0 deletions

diff --git a/drivers/video/aty/radeon_i2c.c b/drivers/video/aty/radeon_i2c.c
new file mode 100644
index 00000000000..762244164c8
--- /dev/null
+++ b/drivers/video/aty/radeon_i2c.c
@@ -0,0 +1,265 @@
+#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 <linux/i2c.h>
+#include <linux/i2c-id.h>
+#include <linux/i2c-algo-bit.h>
+
+#include <asm/io.h>
+
+#include <video/radeon.h>
+#include "radeonfb.h"
+#include "../edid.h"
+
+#define RADEON_DDC 	0x50
+
+static void radeon_gpio_setscl(void* data, int state)
+{
+	struct radeon_i2c_chan 	*chan = data;
+	struct radeonfb_info	*rinfo = chan->rinfo;
+	u32			val;
+	
+	val = INREG(chan->ddc_reg) & ~(VGA_DDC_CLK_OUT_EN);
+	if (!state)
+		val |= VGA_DDC_CLK_OUT_EN;
+
+	OUTREG(chan->ddc_reg, val);
+	(void)INREG(chan->ddc_reg);
+}
+
+static void radeon_gpio_setsda(void* data, int state)
+{
+	struct radeon_i2c_chan 	*chan = data;
+	struct radeonfb_info	*rinfo = chan->rinfo;
+	u32			val;
+	
+	val = INREG(chan->ddc_reg) & ~(VGA_DDC_DATA_OUT_EN);
+	if (!state)
+		val |= VGA_DDC_DATA_OUT_EN;
+
+	OUTREG(chan->ddc_reg, val);
+	(void)INREG(chan->ddc_reg);
+}
+
+static int radeon_gpio_getscl(void* data)
+{
+	struct radeon_i2c_chan 	*chan = data;
+	struct radeonfb_info	*rinfo = chan->rinfo;
+	u32			val;
+	
+	val = INREG(chan->ddc_reg);
+
+	return (val & VGA_DDC_CLK_INPUT) ? 1 : 0;
+}
+
+static int radeon_gpio_getsda(void* data)
+{
+	struct radeon_i2c_chan 	*chan = data;
+	struct radeonfb_info	*rinfo = chan->rinfo;
+	u32			val;
+	
+	val = INREG(chan->ddc_reg);
+
+	return (val & VGA_DDC_DATA_INPUT) ? 1 : 0;
+}
+
+static int radeon_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->rinfo->pdev->dev;
+	chan->algo.setsda		= radeon_gpio_setsda;
+	chan->algo.setscl		= radeon_gpio_setscl;
+	chan->algo.getsda		= radeon_gpio_getsda;
+	chan->algo.getscl		= radeon_gpio_getscl;
+	chan->algo.udelay		= 40;
+	chan->algo.timeout		= 20;
+	chan->algo.data 		= chan;	
+	
+	i2c_set_adapdata(&chan->adapter, chan);
+	
+	/* Raise SCL and SDA */
+	radeon_gpio_setsda(chan, 1);
+	radeon_gpio_setscl(chan, 1);
+	udelay(20);
+
+	rc = i2c_bit_add_bus(&chan->adapter);
+	if (rc == 0)
+		dev_dbg(&chan->rinfo->pdev->dev, "I2C bus %s registered.\n", name);
+	else
+		dev_warn(&chan->rinfo->pdev->dev, "Failed to register I2C bus %s.\n", name);
+	return rc;
+}
+
+void radeon_create_i2c_busses(struct radeonfb_info *rinfo)
+{
+	rinfo->i2c[0].rinfo	= rinfo;
+	rinfo->i2c[0].ddc_reg	= GPIO_MONID;
+	radeon_setup_i2c_bus(&rinfo->i2c[0], "monid");
+
+	rinfo->i2c[1].rinfo	= rinfo;
+	rinfo->i2c[1].ddc_reg	= GPIO_DVI_DDC;
+	radeon_setup_i2c_bus(&rinfo->i2c[1], "dvi");
+
+	rinfo->i2c[2].rinfo	= rinfo;
+	rinfo->i2c[2].ddc_reg	= GPIO_VGA_DDC;
+	radeon_setup_i2c_bus(&rinfo->i2c[2], "vga");
+
+	rinfo->i2c[3].rinfo	= rinfo;
+	rinfo->i2c[3].ddc_reg	= GPIO_CRT2_DDC;
+	radeon_setup_i2c_bus(&rinfo->i2c[3], "crt2");
+}
+
+void radeon_delete_i2c_busses(struct radeonfb_info *rinfo)
+{
+	if (rinfo->i2c[0].rinfo)
+		i2c_bit_del_bus(&rinfo->i2c[0].adapter);
+	rinfo->i2c[0].rinfo = NULL;
+
+	if (rinfo->i2c[1].rinfo)
+		i2c_bit_del_bus(&rinfo->i2c[1].adapter);
+	rinfo->i2c[1].rinfo = NULL;
+
+	if (rinfo->i2c[2].rinfo)
+		i2c_bit_del_bus(&rinfo->i2c[2].adapter);
+	rinfo->i2c[2].rinfo = NULL;
+
+	if (rinfo->i2c[3].rinfo)
+		i2c_bit_del_bus(&rinfo->i2c[3].adapter);
+	rinfo->i2c[3].rinfo = NULL;
+}
+
+
+static u8 *radeon_do_probe_i2c_edid(struct radeon_i2c_chan *chan)
+{
+	u8 start = 0x0;
+	struct i2c_msg msgs[] = {
+		{
+			.addr	= RADEON_DDC,
+			.len	= 1,
+			.buf	= &start,
+		}, {
+			.addr	= RADEON_DDC,
+			.flags	= I2C_M_RD,
+			.len	= EDID_LENGTH,
+		},
+	};
+	u8 *buf;
+
+	buf = kmalloc(EDID_LENGTH, GFP_KERNEL);
+	if (!buf) {
+		dev_warn(&chan->rinfo->pdev->dev, "Out of memory!\n");
+		return NULL;
+	}
+	msgs[1].buf = buf;
+
+	if (i2c_transfer(&chan->adapter, msgs, 2) == 2)
+		return buf;
+	dev_dbg(&chan->rinfo->pdev->dev, "Unable to read EDID block.\n");
+	kfree(buf);
+	return NULL;
+}
+
+
+int radeon_probe_i2c_connector(struct radeonfb_info *rinfo, int conn, u8 **out_edid)
+{
+	u32 reg = rinfo->i2c[conn-1].ddc_reg;
+	u8 *edid = NULL;
+	int i, j;
+
+	OUTREG(reg, INREG(reg) & 
+			~(VGA_DDC_DATA_OUTPUT | VGA_DDC_CLK_OUTPUT));
+
+	OUTREG(reg, INREG(reg) & ~(VGA_DDC_CLK_OUT_EN));
+	(void)INREG(reg);
+
+	for (i = 0; i < 3; i++) {
+		/* For some old monitors we need the
+		 * following process to initialize/stop DDC
+		 */
+		OUTREG(reg, INREG(reg) & ~(VGA_DDC_DATA_OUT_EN));
+		(void)INREG(reg);
+		msleep(13);
+
+		OUTREG(reg, INREG(reg) & ~(VGA_DDC_CLK_OUT_EN));
+		(void)INREG(reg);
+		for (j = 0; j < 5; j++) {
+			msleep(10);
+			if (INREG(reg) & VGA_DDC_CLK_INPUT)
+				break;
+		}
+		if (j == 5)
+			continue;
+
+		OUTREG(reg, INREG(reg) | VGA_DDC_DATA_OUT_EN);
+		(void)INREG(reg);
+		msleep(15);
+		OUTREG(reg, INREG(reg) | VGA_DDC_CLK_OUT_EN);
+		(void)INREG(reg);
+		msleep(15);
+		OUTREG(reg, INREG(reg) & ~(VGA_DDC_DATA_OUT_EN));
+		(void)INREG(reg);
+		msleep(15);
+
+		/* Do the real work */
+		edid = radeon_do_probe_i2c_edid(&rinfo->i2c[conn-1]);
+
+		OUTREG(reg, INREG(reg) | 
+				(VGA_DDC_DATA_OUT_EN | VGA_DDC_CLK_OUT_EN));
+		(void)INREG(reg);
+		msleep(15);
+		
+		OUTREG(reg, INREG(reg) & ~(VGA_DDC_CLK_OUT_EN));
+		(void)INREG(reg);
+		for (j = 0; j < 10; j++) {
+			msleep(10);
+			if (INREG(reg) & VGA_DDC_CLK_INPUT)
+				break;
+		}
+
+		OUTREG(reg, INREG(reg) & ~(VGA_DDC_DATA_OUT_EN));
+		(void)INREG(reg);
+		msleep(15);
+		OUTREG(reg, INREG(reg) |
+				(VGA_DDC_DATA_OUT_EN | VGA_DDC_CLK_OUT_EN));
+		(void)INREG(reg);
+		if (edid)
+			break;
+	}
+	/* Release the DDC lines when done or the Apple Cinema HD display
+	 * will switch off
+	 */
+	OUTREG(reg, INREG(reg) & ~(VGA_DDC_CLK_OUT_EN | VGA_DDC_DATA_OUT_EN));
+	(void)INREG(reg);
+
+	if (out_edid)
+		*out_edid = edid;
+	if (!edid) {
+		RTRACE("radeonfb: I2C (port %d) ... not found\n", conn);
+		return MT_NONE;
+	}
+	if (edid[0x14] & 0x80) {
+		/* Fix detection using BIOS tables */
+		if (rinfo->is_mobility /*&& conn == ddc_dvi*/ &&
+		    (INREG(LVDS_GEN_CNTL) & LVDS_ON)) {
+			RTRACE("radeonfb: I2C (port %d) ... found LVDS panel\n", conn);
+			return MT_LCD;
+		} else {
+			RTRACE("radeonfb: I2C (port %d) ... found TMDS panel\n", conn);
+			return MT_DFP;
+		}
+	}
+       	RTRACE("radeonfb: I2C (port %d) ... found CRT display\n", conn);
+	return MT_CRT;
+}
+