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: Bin Meng bmeng.cn@gmail.com Reviewed-by: Simon Glass sjg@chromium.org ---
Changes in v3: None Changes in v2: None
drivers/misc/Makefile | 1 + drivers/misc/smsc_sio1007.c | 126 ++++++++++++++++++++++++++++++++++++++++++++ include/smsc_sio1007.h | 115 ++++++++++++++++++++++++++++++++++++++++ 3 files changed, 242 insertions(+) create mode 100644 drivers/misc/smsc_sio1007.c create mode 100644 include/smsc_sio1007.h
diff --git a/drivers/misc/Makefile b/drivers/misc/Makefile index e1e3c6b..f2b08ab 100644 --- a/drivers/misc/Makefile +++ b/drivers/misc/Makefile @@ -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 diff --git a/drivers/misc/smsc_sio1007.c b/drivers/misc/smsc_sio1007.c new file mode 100644 index 0000000..ec53533 --- /dev/null +++ b/drivers/misc/smsc_sio1007.c @@ -0,0 +1,126 @@ +/* + * 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); +} diff --git a/include/smsc_sio1007.h b/include/smsc_sio1007.h new file mode 100644 index 0000000..805fa0e --- /dev/null +++ b/include/smsc_sio1007.h @@ -0,0 +1,115 @@ +/* + * 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_ */