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authorBin Meng <bmeng.cn@gmail.com>2016-02-17 00:16:22 -0800
committerBin Meng <bmeng.cn@gmail.com>2016-02-21 13:42:52 +0800
commit98af34f897a6ef5de253806049d033471b02479f (patch)
treefeff8600946694c48cca4eacc26418af62d98b7d /drivers/misc
parent437413962744cc9c80551ca253a20472856551f2 (diff)
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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/misc')
-rw-r--r--drivers/misc/Makefile1
-rw-r--r--drivers/misc/smsc_sio1007.c126
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);
+}