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/* SPDX-License-Identifier: GPL-2.0-only */
#include <device/device.h>
#include <arch/io.h>
#include <delay.h>
#include "dock.h"
#include <superio/nsc/pc87384/pc87384.h>
#include "ec/acpi/ec.h"
#include "ec/lenovo/pmh7/pmh7.h"
#include <southbridge/intel/i82801gx/i82801gx.h>
#define DLPC_CONTROL 0x164c
static void dlpc_write_register(int reg, int value)
{
outb(reg, 0x164e);
outb(value, 0x164f);
}
static u8 dlpc_read_register(int reg)
{
outb(reg, 0x164e);
return inb(0x164f);
}
static void dock_write_register(int reg, int value)
{
outb(reg, 0x2e);
outb(value, 0x2f);
}
static u8 dock_read_register(int reg)
{
outb(reg, 0x2e);
return inb(0x2f);
}
static void dlpc_gpio_set_mode(int port, int mode)
{
dlpc_write_register(0xf0, port);
dlpc_write_register(0xf1, mode);
}
static void dock_gpio_set_mode(int port, int mode, int irq)
{
dock_write_register(0xf0, port);
dock_write_register(0xf1, mode);
dock_write_register(0xf2, irq);
}
static void dlpc_gpio_init(void)
{
/* Select GPIO module */
dlpc_write_register(0x07, 0x07);
/* GPIO Base Address 0x1680 */
dlpc_write_register(0x60, 0x16);
dlpc_write_register(0x61, 0x80);
/* Activate GPIO */
dlpc_write_register(0x30, 0x01);
dlpc_gpio_set_mode(0x00, 3);
dlpc_gpio_set_mode(0x01, 3);
dlpc_gpio_set_mode(0x02, 0);
dlpc_gpio_set_mode(0x03, 3);
dlpc_gpio_set_mode(0x04, 4);
dlpc_gpio_set_mode(0x20, 4);
dlpc_gpio_set_mode(0x21, 4);
dlpc_gpio_set_mode(0x23, 4);
}
int dlpc_init(void)
{
int timeout = 1000;
/* Enable 14.318MHz CLK on CLKIN */
dlpc_write_register(0x29, 0xa0);
while(!(dlpc_read_register(0x29) & 0x10) && timeout--)
udelay(1000);
if (!timeout)
return 1;
/* Select DLPC module */
dlpc_write_register(0x07, 0x19);
/* DLPC Base Address */
dlpc_write_register(0x60, (DLPC_CONTROL >> 8) & 0xff);
dlpc_write_register(0x61, DLPC_CONTROL & 0xff);
/* Activate DLPC */
dlpc_write_register(0x30, 0x01);
/* Reset docking state */
outb(0x00, DLPC_CONTROL);
dlpc_gpio_init();
return 0;
}
static int dock_superio_init(void)
{
int timeout = 1000;
/* startup 14.318MHz Clock */
dock_write_register(0x29, 0xa0);
/* wait until clock is settled */
while(!(dock_read_register(0x29) & 0x10) && timeout--)
udelay(1000);
if (!timeout)
return 1;
/* set GPIO pins to Serial/Parallel Port
* functions
*/
dock_write_register(0x22, 0xa9);
/* enable serial port */
dock_write_register(0x07, PC87384_SP1);
dock_write_register(0x30, 0x01);
dock_write_register(0x07, PC87384_GPIO);
dock_write_register(0x60, 0x16);
dock_write_register(0x61, 0x20);
/* enable GPIO */
dock_write_register(0x30, 0x01);
dock_gpio_set_mode(0x00, PC87384_GPIO_PIN_DEBOUNCE |
PC87384_GPIO_PIN_PULLUP, 0x00);
dock_gpio_set_mode(0x01, PC87384_GPIO_PIN_TYPE_PUSH_PULL |
PC87384_GPIO_PIN_OE, 0x00);
dock_gpio_set_mode(0x02, PC87384_GPIO_PIN_TYPE_PUSH_PULL |
PC87384_GPIO_PIN_OE, 0x00);
dock_gpio_set_mode(0x03, PC87384_GPIO_PIN_DEBOUNCE |
PC87384_GPIO_PIN_PULLUP, 0x00);
dock_gpio_set_mode(0x04, PC87384_GPIO_PIN_DEBOUNCE |
PC87384_GPIO_PIN_PULLUP, 0x00);
dock_gpio_set_mode(0x05, PC87384_GPIO_PIN_DEBOUNCE |
PC87384_GPIO_PIN_PULLUP, 0x00);
dock_gpio_set_mode(0x06, PC87384_GPIO_PIN_DEBOUNCE |
PC87384_GPIO_PIN_PULLUP, 0x00);
dock_gpio_set_mode(0x07, PC87384_GPIO_PIN_DEBOUNCE |
PC87384_GPIO_PIN_PULLUP, 0x00);
/* no GPIO events enabled for PORT0 */
outb(0x00, 0x1622);
/* clear GPIO events on PORT0 */
outb(0xff, 0x1623);
outb(0xff, 0x1624);
/* no GPIO events enabled for PORT1 */
outb(0x00, 0x1626);
/* clear GPIO events on PORT1*/
outb(0xff, 0x1627);
outb(0x1F, 0x1628);
outb(0xfd, 0x1620);
return 0;
}
int dock_connect(void)
{
int timeout = 1000;
outb(0x07, DLPC_CONTROL);
timeout = 1000;
while(!(inb(DLPC_CONTROL) & 8) && timeout--)
udelay(1000);
if (!timeout) {
/* docking failed, disable DLPC switch */
outb(0x00, DLPC_CONTROL);
dlpc_write_register(0x30, 0x00);
return 1;
}
/* Assert D_PLTRST# */
outb(0xfe, 0x1680);
udelay(1000);
/* Deassert D_PLTRST# */
outb(0xff, 0x1680);
udelay(10000);
return dock_superio_init();
}
void dock_disconnect(void)
{
/* disconnect LPC bus */
outb(0x00, DLPC_CONTROL);
/* Assert PLTRST and DLPCPD */
outb(0xfc, 0x1680);
}
int dock_present(void)
{
return pmh7_register_read(0x61) & 1;
}
int legacy_io_present(void)
{
return !(inb(DEFAULT_GPIOBASE + 0x0c) & 0x40);
}
void legacy_io_init(void)
{
/* Enable Power for Ultrabay slot */
pmh7_ultrabay_power_enable(1);
udelay(100000);
dock_superio_init();
}
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