| 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
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| 2 | /* Miscellaneous definitions for VIA chipsets |
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| 3 | Currently used only by drivers/parport/parport_pc.c */ |
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| 4 | |
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| 5 | /* Values for SuperIO function select configuration register */ |
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| 6 | #define VIA_FUNCTION_PARPORT_SPP 0x00 |
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| 7 | #define VIA_FUNCTION_PARPORT_ECP 0x01 |
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| 8 | #define VIA_FUNCTION_PARPORT_EPP 0x02 |
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| 9 | #define VIA_FUNCTION_PARPORT_DISABLE 0x03 |
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| 10 | #define VIA_FUNCTION_PROBE 0xFF /* Special magic value to be used in code, not to be written into chip */ |
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| 11 | |
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| 12 | /* Bits for parallel port mode configuration register */ |
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| 13 | #define VIA_PARPORT_ECPEPP 0X20 |
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| 14 | #define VIA_PARPORT_BIDIR 0x80 |
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| 15 | |
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| 16 | /* VIA configuration registers */ |
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| 17 | #define VIA_CONFIG_INDEX 0x3F0 |
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| 18 | #define VIA_CONFIG_DATA 0x3F1 |
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| 19 | |
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| 20 | /* Mask for parallel port IRQ bits (in ISA PnP IRQ routing register 1) */ |
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| 21 | #define VIA_IRQCONTROL_PARALLEL 0xF0 |
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| 22 | /* Mask for parallel port DMA bits (in ISA PnP DMA routing register) */ |
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| 23 | #define VIA_DMACONTROL_PARALLEL 0x0C |
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| 24 | |
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