diff options
author | Bin Meng <bmeng.cn@gmail.com> | 2016-02-17 08:16:22 (GMT) |
---|---|---|
committer | Bin Meng <bmeng.cn@gmail.com> | 2016-02-21 05:42:52 (GMT) |
commit | 98af34f897a6ef5de253806049d033471b02479f (patch) | |
tree | feff8600946694c48cca4eacc26418af62d98b7d /drivers | |
parent | 437413962744cc9c80551ca253a20472856551f2 (diff) | |
download | u-boot-98af34f897a6ef5de253806049d033471b02479f.tar.xz |
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: Bin Meng <bmeng.cn@gmail.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
Diffstat (limited to 'drivers')
-rw-r--r-- | drivers/misc/Makefile | 1 | ||||
-rw-r--r-- | drivers/misc/smsc_sio1007.c | 126 |
2 files changed, 127 insertions, 0 deletions
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); +} |