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| author | Stefan Roese <sr@denx.de> | 2016-01-19 14:05:10 +0100 |
|---|---|---|
| committer | Bin Meng <bmeng.cn@gmail.com> | 2016-01-28 13:53:30 +0800 |
| commit | 85056932f2bad4b6749d42c983d2219ae70fa741 (patch) | |
| tree | c0276be83cb5e34692eaca6ffcf45f6bf8667146 /include | |
| parent | 0a34a5fd2794a87c43e8d009ccb711e6839843b2 (diff) | |
| download | u-boot-imx-85056932f2bad4b6749d42c983d2219ae70fa741.zip u-boot-imx-85056932f2bad4b6749d42c983d2219ae70fa741.tar.gz u-boot-imx-85056932f2bad4b6749d42c983d2219ae70fa741.tar.bz2 | |
misc: Add simple driver to enable the legacy UART on Winbond Super IO chips
On most x86 boards, the legacy serial ports (io address 0x3f8/0x2f8)
are provided by a superio chip connected to the LPC bus. We must
program the superio chip so that serial ports are available for us.
Signed-off-by: Stefan Roese <sr@denx.de>
Cc: Bin Meng <bmeng.cn@gmail.com>
Cc: Simon Glass <sjg@chromium.org>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
Diffstat (limited to 'include')
| -rw-r--r-- | include/winbond_w83627.h | 35 |
1 files changed, 35 insertions, 0 deletions
diff --git a/include/winbond_w83627.h b/include/winbond_w83627.h new file mode 100644 index 0000000..ac3bec6 --- /dev/null +++ b/include/winbond_w83627.h @@ -0,0 +1,35 @@ +/* + * Copyright (C) 2016 Stefan Roese <sr@denx.de> + * + * SPDX-License-Identifier: GPL-2.0+ + */ + +#ifndef _WINBOND_W83627_H_ +#define _WINBOND_W83627_H_ + +/* I/O address of Winbond Super IO chip */ +#define WINBOND_IO_PORT 0x2e + +/* Logical device number */ +#define W83627DHG_FDC 0 /* Floppy */ +#define W83627DHG_PP 1 /* Parallel port */ +#define W83627DHG_SP1 2 /* Com1 */ +#define W83627DHG_SP2 3 /* Com2 */ +#define W83627DHG_KBC 5 /* PS/2 keyboard & mouse */ +#define W83627DHG_SPI 6 /* Serial peripheral interface */ +#define W83627DHG_WDTO_PLED 8 /* WDTO#, PLED */ +#define W83627DHG_ACPI 10 /* ACPI */ +#define W83627DHG_HWM 11 /* Hardware monitor */ +#define W83627DHG_PECI_SST 12 /* PECI, SST */ + +/** + * Configure the base I/O port of the specified serial device and enable the + * serial device. + * + * @dev: high 8 bits = super I/O port, low 8 bits = logical device number + * @iobase: processor I/O port address to assign to this serial device + * @irq: processor IRQ number to assign to this serial device + */ +void winbond_enable_serial(uint dev, uint iobase, uint irq); + +#endif /* _WINBOND_W83627_H_ */ |