239 строки
6.2 KiB
C
239 строки
6.2 KiB
C
/*
|
|
*
|
|
* Hardware accelerated Matrox Millennium I, II, Mystique, G100, G200, G400 and G450.
|
|
*
|
|
* (c) 1998-2002 Petr Vandrovec <vandrove@vc.cvut.cz>
|
|
*
|
|
* Version: 1.64 2002/06/10
|
|
*
|
|
* See matroxfb_base.c for contributors.
|
|
*
|
|
*/
|
|
|
|
#include "matroxfb_base.h"
|
|
#include "matroxfb_maven.h"
|
|
#include <linux/i2c.h>
|
|
#include <linux/slab.h>
|
|
#include <linux/i2c-algo-bit.h>
|
|
|
|
/* MGA-TVO I2C for G200, G400 */
|
|
#define MAT_CLK 0x20
|
|
#define MAT_DATA 0x10
|
|
/* primary head DDC for Mystique(?), G100, G200, G400 */
|
|
#define DDC1_CLK 0x08
|
|
#define DDC1_DATA 0x02
|
|
/* primary head DDC for Millennium, Millennium II */
|
|
#define DDC1B_CLK 0x10
|
|
#define DDC1B_DATA 0x04
|
|
/* secondary head DDC for G400 */
|
|
#define DDC2_CLK 0x04
|
|
#define DDC2_DATA 0x01
|
|
|
|
/******************************************************/
|
|
|
|
struct matroxfb_dh_maven_info {
|
|
struct i2c_bit_adapter maven;
|
|
struct i2c_bit_adapter ddc1;
|
|
struct i2c_bit_adapter ddc2;
|
|
};
|
|
|
|
static int matroxfb_read_gpio(struct matrox_fb_info* minfo) {
|
|
unsigned long flags;
|
|
int v;
|
|
|
|
matroxfb_DAC_lock_irqsave(flags);
|
|
v = matroxfb_DAC_in(minfo, DAC_XGENIODATA);
|
|
matroxfb_DAC_unlock_irqrestore(flags);
|
|
return v;
|
|
}
|
|
|
|
static void matroxfb_set_gpio(struct matrox_fb_info* minfo, int mask, int val) {
|
|
unsigned long flags;
|
|
int v;
|
|
|
|
matroxfb_DAC_lock_irqsave(flags);
|
|
v = (matroxfb_DAC_in(minfo, DAC_XGENIOCTRL) & mask) | val;
|
|
matroxfb_DAC_out(minfo, DAC_XGENIOCTRL, v);
|
|
/* We must reset GENIODATA very often... XFree plays with this register */
|
|
matroxfb_DAC_out(minfo, DAC_XGENIODATA, 0x00);
|
|
matroxfb_DAC_unlock_irqrestore(flags);
|
|
}
|
|
|
|
/* software I2C functions */
|
|
static inline void matroxfb_i2c_set(struct matrox_fb_info* minfo, int mask, int state) {
|
|
if (state)
|
|
state = 0;
|
|
else
|
|
state = mask;
|
|
matroxfb_set_gpio(minfo, ~mask, state);
|
|
}
|
|
|
|
static void matroxfb_gpio_setsda(void* data, int state) {
|
|
struct i2c_bit_adapter* b = data;
|
|
matroxfb_i2c_set(b->minfo, b->mask.data, state);
|
|
}
|
|
|
|
static void matroxfb_gpio_setscl(void* data, int state) {
|
|
struct i2c_bit_adapter* b = data;
|
|
matroxfb_i2c_set(b->minfo, b->mask.clock, state);
|
|
}
|
|
|
|
static int matroxfb_gpio_getsda(void* data) {
|
|
struct i2c_bit_adapter* b = data;
|
|
return (matroxfb_read_gpio(b->minfo) & b->mask.data) ? 1 : 0;
|
|
}
|
|
|
|
static int matroxfb_gpio_getscl(void* data) {
|
|
struct i2c_bit_adapter* b = data;
|
|
return (matroxfb_read_gpio(b->minfo) & b->mask.clock) ? 1 : 0;
|
|
}
|
|
|
|
static const struct i2c_algo_bit_data matrox_i2c_algo_template =
|
|
{
|
|
.setsda = matroxfb_gpio_setsda,
|
|
.setscl = matroxfb_gpio_setscl,
|
|
.getsda = matroxfb_gpio_getsda,
|
|
.getscl = matroxfb_gpio_getscl,
|
|
.udelay = 10,
|
|
.timeout = 100,
|
|
};
|
|
|
|
static int i2c_bus_reg(struct i2c_bit_adapter* b, struct matrox_fb_info* minfo,
|
|
unsigned int data, unsigned int clock, const char *name,
|
|
int class)
|
|
{
|
|
int err;
|
|
|
|
b->minfo = minfo;
|
|
b->mask.data = data;
|
|
b->mask.clock = clock;
|
|
b->adapter.owner = THIS_MODULE;
|
|
snprintf(b->adapter.name, sizeof(b->adapter.name), name,
|
|
minfo->fbcon.node);
|
|
i2c_set_adapdata(&b->adapter, b);
|
|
b->adapter.class = class;
|
|
b->adapter.algo_data = &b->bac;
|
|
b->adapter.dev.parent = &minfo->pcidev->dev;
|
|
b->bac = matrox_i2c_algo_template;
|
|
b->bac.data = b;
|
|
err = i2c_bit_add_bus(&b->adapter);
|
|
b->initialized = !err;
|
|
return err;
|
|
}
|
|
|
|
static void i2c_bit_bus_del(struct i2c_bit_adapter* b) {
|
|
if (b->initialized) {
|
|
i2c_del_adapter(&b->adapter);
|
|
b->initialized = 0;
|
|
}
|
|
}
|
|
|
|
static inline void i2c_maven_done(struct matroxfb_dh_maven_info* minfo2) {
|
|
i2c_bit_bus_del(&minfo2->maven);
|
|
}
|
|
|
|
static inline void i2c_ddc1_done(struct matroxfb_dh_maven_info* minfo2) {
|
|
i2c_bit_bus_del(&minfo2->ddc1);
|
|
}
|
|
|
|
static inline void i2c_ddc2_done(struct matroxfb_dh_maven_info* minfo2) {
|
|
i2c_bit_bus_del(&minfo2->ddc2);
|
|
}
|
|
|
|
static void* i2c_matroxfb_probe(struct matrox_fb_info* minfo) {
|
|
int err;
|
|
unsigned long flags;
|
|
struct matroxfb_dh_maven_info* m2info;
|
|
|
|
m2info = kzalloc(sizeof(*m2info), GFP_KERNEL);
|
|
if (!m2info)
|
|
return NULL;
|
|
|
|
matroxfb_DAC_lock_irqsave(flags);
|
|
matroxfb_DAC_out(minfo, DAC_XGENIODATA, 0xFF);
|
|
matroxfb_DAC_out(minfo, DAC_XGENIOCTRL, 0x00);
|
|
matroxfb_DAC_unlock_irqrestore(flags);
|
|
|
|
switch (minfo->chip) {
|
|
case MGA_2064:
|
|
case MGA_2164:
|
|
err = i2c_bus_reg(&m2info->ddc1, minfo,
|
|
DDC1B_DATA, DDC1B_CLK,
|
|
"DDC:fb%u #0", I2C_CLASS_DDC);
|
|
break;
|
|
default:
|
|
err = i2c_bus_reg(&m2info->ddc1, minfo,
|
|
DDC1_DATA, DDC1_CLK,
|
|
"DDC:fb%u #0", I2C_CLASS_DDC);
|
|
break;
|
|
}
|
|
if (err)
|
|
goto fail_ddc1;
|
|
if (minfo->devflags.dualhead) {
|
|
err = i2c_bus_reg(&m2info->ddc2, minfo,
|
|
DDC2_DATA, DDC2_CLK,
|
|
"DDC:fb%u #1", I2C_CLASS_DDC);
|
|
if (err == -ENODEV) {
|
|
printk(KERN_INFO "i2c-matroxfb: VGA->TV plug detected, DDC unavailable.\n");
|
|
} else if (err)
|
|
printk(KERN_INFO "i2c-matroxfb: Could not register secondary output i2c bus. Continuing anyway.\n");
|
|
/* Register maven bus even on G450/G550 */
|
|
err = i2c_bus_reg(&m2info->maven, minfo,
|
|
MAT_DATA, MAT_CLK, "MAVEN:fb%u", 0);
|
|
if (err)
|
|
printk(KERN_INFO "i2c-matroxfb: Could not register Maven i2c bus. Continuing anyway.\n");
|
|
else {
|
|
struct i2c_board_info maven_info = {
|
|
I2C_BOARD_INFO("maven", 0x1b),
|
|
};
|
|
unsigned short const addr_list[2] = {
|
|
0x1b, I2C_CLIENT_END
|
|
};
|
|
|
|
i2c_new_probed_device(&m2info->maven.adapter,
|
|
&maven_info, addr_list, NULL);
|
|
}
|
|
}
|
|
return m2info;
|
|
fail_ddc1:;
|
|
kfree(m2info);
|
|
printk(KERN_ERR "i2c-matroxfb: Could not register primary adapter DDC bus.\n");
|
|
return NULL;
|
|
}
|
|
|
|
static void i2c_matroxfb_remove(struct matrox_fb_info* minfo, void* data) {
|
|
struct matroxfb_dh_maven_info* m2info = data;
|
|
|
|
i2c_maven_done(m2info);
|
|
i2c_ddc2_done(m2info);
|
|
i2c_ddc1_done(m2info);
|
|
kfree(m2info);
|
|
}
|
|
|
|
static struct matroxfb_driver i2c_matroxfb = {
|
|
.node = LIST_HEAD_INIT(i2c_matroxfb.node),
|
|
.name = "i2c-matroxfb",
|
|
.probe = i2c_matroxfb_probe,
|
|
.remove = i2c_matroxfb_remove,
|
|
};
|
|
|
|
static int __init i2c_matroxfb_init(void) {
|
|
if (matroxfb_register_driver(&i2c_matroxfb)) {
|
|
printk(KERN_ERR "i2c-matroxfb: failed to register driver\n");
|
|
return -ENXIO;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static void __exit i2c_matroxfb_exit(void) {
|
|
matroxfb_unregister_driver(&i2c_matroxfb);
|
|
}
|
|
|
|
MODULE_AUTHOR("(c) 1999-2002 Petr Vandrovec <vandrove@vc.cvut.cz>");
|
|
MODULE_DESCRIPTION("Support module providing I2C buses present on Matrox videocards");
|
|
|
|
module_init(i2c_matroxfb_init);
|
|
module_exit(i2c_matroxfb_exit);
|
|
/* no __setup required */
|
|
MODULE_LICENSE("GPL");
|