Commit 98af34f8 authored by Bin Meng's avatar Bin Meng

superio: Add SMSC SIO1007 driver

The SMSC SIO1007 superio chipset integrates two ns16550 compatible
serial ports for legacy applications, 16 GPIO pins and some other
functionalities like power management.

This adds a simple driver to enable serial port and handle GPIO.
Signed-off-by: default avatarBin Meng <bmeng.cn@gmail.com>
Reviewed-by: default avatarSimon Glass <sjg@chromium.org>
parent 43741396
......@@ -32,6 +32,7 @@ ifdef CONFIG_DM_I2C
obj-$(CONFIG_SANDBOX) += i2c_eeprom_emul.o
endif
obj-$(CONFIG_SMSC_LPC47M) += smsc_lpc47m.o
obj-$(CONFIG_SMSC_SIO1007) += smsc_sio1007.o
obj-$(CONFIG_STATUS_LED) += status_led.o
obj-$(CONFIG_SANDBOX) += swap_case.o
obj-$(CONFIG_SANDBOX) += syscon_sandbox.o
......
/*
* Copyright (C) 2016, Bin Meng <bmeng.cn@gmail.com>
*
* SPDX-License-Identifier: GPL-2.0+
*/
#include <common.h>
#include <asm/io.h>
#include <errno.h>
#include <smsc_sio1007.h>
static inline u8 sio1007_read(int port, int reg)
{
outb(reg, port);
return inb(port + 1);
}
static inline void sio1007_write(int port, int reg, int val)
{
outb(reg, port);
outb(val, port + 1);
}
static inline void sio1007_clrsetbits(int port, int reg, u8 clr, u8 set)
{
sio1007_write(port, reg, (sio1007_read(port, reg) & ~clr) | set);
}
void sio1007_enable_serial(int port, int num, int iobase, int irq)
{
if (num < 0 || num > SIO1007_UART_NUM)
return;
/* enter configuration state */
outb(0x55, port);
/* power on serial port and set up its i/o base & irq */
if (!num) {
sio1007_clrsetbits(port, DEV_POWER_CTRL, 0, UART1_POWER_ON);
sio1007_clrsetbits(port, UART1_IOBASE, 0xfe, iobase >> 2);
sio1007_clrsetbits(port, UART_IRQ, 0xf0, irq << 4);
} else {
sio1007_clrsetbits(port, DEV_POWER_CTRL, 0, UART2_POWER_ON);
sio1007_clrsetbits(port, UART2_IOBASE, 0xfe, iobase >> 2);
sio1007_clrsetbits(port, UART_IRQ, 0x0f, irq);
}
/* exit configuration state */
outb(0xaa, port);
}
void sio1007_enable_runtime(int port, int iobase)
{
/* enter configuration state */
outb(0x55, port);
/* set i/o base for the runtime register block */
sio1007_clrsetbits(port, RTR_IOBASE_LOW, 0, iobase >> 4);
sio1007_clrsetbits(port, RTR_IOBASE_HIGH, 0, iobase >> 12);
/* turn on address decoding for this block */
sio1007_clrsetbits(port, DEV_ACTIVATE, 0, RTR_EN);
/* exit configuration state */
outb(0xaa, port);
}
void sio1007_gpio_config(int port, int gpio, int dir, int pol, int type)
{
int reg = GPIO0_DIR;
if (gpio < 0 || gpio > SIO1007_GPIO_NUM)
return;
if (gpio >= GPIO_NUM_PER_GROUP) {
reg = GPIO1_DIR;
gpio -= GPIO_NUM_PER_GROUP;
}
/* enter configuration state */
outb(0x55, port);
/* set gpio pin direction, polority and type */
sio1007_clrsetbits(port, reg, 1 << gpio, dir << gpio);
sio1007_clrsetbits(port, reg + 1, 1 << gpio, pol << gpio);
sio1007_clrsetbits(port, reg + 2, 1 << gpio, type << gpio);
/* exit configuration state */
outb(0xaa, port);
}
int sio1007_gpio_get_value(int port, int gpio)
{
int reg = GPIO0_DATA;
int val;
if (gpio < 0 || gpio > SIO1007_GPIO_NUM)
return -EINVAL;
if (gpio >= GPIO_NUM_PER_GROUP) {
reg = GPIO1_DATA;
gpio -= GPIO_NUM_PER_GROUP;
}
val = inb(port + reg);
if (val & (1 << gpio))
return 1;
else
return 0;
}
void sio1007_gpio_set_value(int port, int gpio, int val)
{
int reg = GPIO0_DATA;
u8 data;
if (gpio < 0 || gpio > SIO1007_GPIO_NUM)
return;
if (gpio >= GPIO_NUM_PER_GROUP) {
reg = GPIO1_DATA;
gpio -= GPIO_NUM_PER_GROUP;
}
data = inb(port + reg);
data &= ~(1 << gpio);
data |= (val << gpio);
outb(data, port + reg);
}
/*
* Copyright (C) 2016, Bin Meng <bmeng.cn@gmail.com>
*
* SPDX-License-Identifier: GPL-2.0+
*/
#ifndef _SMSC_SIO1007_H_
#define _SMSC_SIO1007_H_
/*
* The I/O base address of SIO1007 at power-up is determined by the SYSOPT0
* and SYSOPT1 pins at the deasserting edge of PCIRST#. The combination of
* SYSOPT0 and SYSOPT1 determines one of the following addresses.
*/
#define SIO1007_IOPORT0 0x002e
#define SIO1007_IOPORT1 0x004e
#define SIO1007_IOPORT2 0x162e
#define SIO1007_IOPORT3 0x164e
/* SIO1007 registers */
#define DEV_POWER_CTRL 0x02
#define UART1_POWER_ON (1 << 3)
#define UART2_POWER_ON (1 << 7)
#define UART1_IOBASE 0x24
#define UART2_IOBASE 0x25
#define UART_IRQ 0x28
#define RTR_IOBASE_HIGH 0x21
#define RTR_IOBASE_LOW 0x30
#define GPIO0_DIR 0x31
#define GPIO1_DIR 0x35
#define GPIO_DIR_INPUT 0
#define GPIO_DIR_OUTPUT 1
#define GPIO0_POL 0x32
#define GPIO1_POL 0x36
#define GPIO_POL_NO_INVERT 0
#define GPIO_POL_INVERT 1
#define GPIO0_TYPE 0x33
#define GPIO1_TYPE 0x37
#define GPIO_TYPE_PUSH_PULL 0
#define GPIO_TYPE_OPEN_DRAIN 1
#define DEV_ACTIVATE 0x3a
#define RTR_EN (1 << 1)
/* Runtime register offset */
#define GPIO0_DATA 0xc
#define GPIO1_DATA 0xe
/* Number of serial ports supported */
#define SIO1007_UART_NUM 2
/* Number of gpio pins supported */
#define GPIO_NUM_PER_GROUP 8
#define GPIO_GROUP_NUM 2
#define SIO1007_GPIO_NUM (GPIO_NUM_PER_GROUP * GPIO_GROUP_NUM)
/**
* Configure the I/O port address of the specified serial device and
* enable the serial device.
*
* @port: SIO1007 I/O port address
* @num: serial device number (0 or 1)
* @iobase: processor I/O port address to assign to this serial device
* @irq: processor IRQ number to assign to this serial device
*/
void sio1007_enable_serial(int port, int num, int iobase, int irq);
/**
* Configure the I/O port address of the runtime register block and
* enable the address decoding.
*
* @port: SIO1007 I/O port address
* @iobase: processor I/O port address to assign to the runtime registers
*/
void sio1007_enable_runtime(int port, int iobase);
/**
* Configure the direction/polority/type of a specified GPIO pin
*
* @port: SIO1007 I/O port address
* @gpio: GPIO number (0-7 for GP10-GP17, 8-15 for GP30-GP37)
* @dir: GPIO_DIR_INPUT or GPIO_DIR_OUTPUT
* @pol: GPIO_POL_NO_INVERT or GPIO_POL_INVERT
* @type: GPIO_TYPE_PUSH_PULL or GPIO_TYPE_OPEN_DRAIN
*/
void sio1007_gpio_config(int port, int gpio, int dir, int pol, int type);
/**
* Get a GPIO pin value.
* This will work whether the GPIO is an input or an output.
*
* @port: runtime register block I/O port address
* @gpio: GPIO number (0-7 for GP10-GP17, 8-15 for GP30-GP37)
* @return: 0 if low, 1 if high, -EINVAL if gpio number is invalid
*/
int sio1007_gpio_get_value(int port, int gpio);
/**
* Set a GPIO pin value.
* This will only work when the GPIO is configured as an output.
*
* @port: runtime register block I/O port address
* @gpio: GPIO number (0-7 for GP10-GP17, 8-15 for GP30-GP37)
* @val: 0 if low, 1 if high
*/
void sio1007_gpio_set_value(int port, int gpio, int val);
#endif /* _SMSC_SIO1007_H_ */
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