diff options
Diffstat (limited to 'arch/arm/mach-orion')
| -rw-r--r-- | arch/arm/mach-orion/ts209-setup.c | 30 |
1 files changed, 30 insertions, 0 deletions
diff --git a/arch/arm/mach-orion/ts209-setup.c b/arch/arm/mach-orion/ts209-setup.c index 34f88ac24ac..e3e930efd15 100644 --- a/arch/arm/mach-orion/ts209-setup.c +++ b/arch/arm/mach-orion/ts209-setup.c @@ -20,6 +20,7 @@ #include <linux/gpio_keys.h> #include <linux/input.h> #include <linux/i2c.h> +#include <linux/serial_reg.h> #include <asm/mach-types.h> #include <asm/gpio.h> #include <asm/mach/arch.h> @@ -239,6 +240,32 @@ static struct platform_device *qnap_ts209_devices[] __initdata = { &qnap_ts209_button_device, }; +/* + * QNAP TS-[12]09 specific power off method via UART1-attached PIC + */ + +#define UART1_REG(x) (UART1_BASE + ((UART_##x) << 2)) + +static void qnap_ts209_power_off(void) +{ + /* 19200 baud divisor */ + const unsigned divisor = ((ORION_TCLK + (8 * 19200)) / (16 * 19200)); + + pr_info("%s: triggering power-off...\n", __func__); + + /* hijack uart1 and reset into sane state (19200,8n1) */ + orion_write(UART1_REG(LCR), 0x83); + orion_write(UART1_REG(DLL), divisor & 0xff); + orion_write(UART1_REG(DLM), (divisor >> 8) & 0xff); + orion_write(UART1_REG(LCR), 0x03); + orion_write(UART1_REG(IER), 0x00); + orion_write(UART1_REG(FCR), 0x00); + orion_write(UART1_REG(MCR), 0x00); + + /* send the power-off command 'A' to PIC */ + orion_write(UART1_REG(TX), 'A'); +} + static void __init qnap_ts209_init(void) { /* @@ -287,6 +314,9 @@ static void __init qnap_ts209_init(void) orion_write(MPP_16_19_CTRL, 0x5500); orion_gpio_set_valid_pins(0x3cc0fff); + /* register ts209 specific power-off method */ + pm_power_off = qnap_ts209_power_off; + platform_add_devices(qnap_ts209_devices, ARRAY_SIZE(qnap_ts209_devices)); i2c_register_board_info(0, &qnap_ts209_i2c_rtc, 1); |