Linux-2.6.12-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!
diff --git a/drivers/video/aty/radeon_i2c.c b/drivers/video/aty/radeon_i2c.c
new file mode 100644
index 0000000..7622441
--- /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;
+}
+