265 lines
6.0 KiB
C
265 lines
6.0 KiB
C
#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_HW_B_RADEON;
|
|
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;
|
|
}
|
|
|