2 * Copyright (c) 2016 Michael Zhilin <mizhka@gmail.com>
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
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9 * notice, this list of conditions and the following disclaimer,
10 * without modification.
11 * 2. Redistributions in binary form must reproduce at minimum a disclaimer
12 * similar to the "NO WARRANTY" disclaimer below ("Disclaimer") and any
13 * redistribution must be conditioned upon including a substantially
14 * similar Disclaimer requirement for further binary redistribution.
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20 * AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
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34 #ifndef _BHND_CORES_CHIPC_CHIPC_SPI_H_
35 #define _BHND_CORES_CHIPC_CHIPC_SPI_H_
37 #define CHIPC_SPI_MAXTRIES 1000
39 #define CHIPC_SPI_ACTION_INPUT 1
40 #define CHIPC_SPI_ACTION_OUTPUT 2
42 #define CHIPC_SPI_FLASHCTL 0x00
43 #define CHIPC_SPI_FLASHCTL_OPCODE 0x000000ff
44 #define CHIPC_SPI_FLASHCTL_ACTION 0x00000700 //
46 * We don't use action at all. Experimentaly found, that
47 * action 0 - read current MISO byte to data register (interactive mode)
48 * action 1 = read 2nd byte to data register
49 * action 2 = read 4th byte to data register (surprise! see action 6)
50 * action 3 = read 5th byte to data register
51 * action 4 = read bytes 5-8 to data register in swapped order
52 * action 5 = read bytes 9-12 to data register in swapped order
53 * action 6 = read 3rd byte to data register
54 * action 7 = read bytes 6-9 to data register in swapped order
55 * It may be wrong if CS bit is 1.
56 * If CS bit is 1, you should write cmd / data to opcode byte-to-byte.
58 #define CHIPC_SPI_FLASHCTL_CSACTIVE 0x00001000
59 #define CHIPC_SPI_FLASHCTL_START 0x80000000 //same as BUSY
60 #define CHIPC_SPI_FLASHCTL_BUSY 0x80000000 //same as BUSY
61 #define CHIPC_SPI_FLASHADDR 0x04
62 #define CHIPC_SPI_FLASHDATA 0x08
64 struct chipc_spi_softc {
66 struct resource *sc_res; /**< SPI registers */
69 struct resource *sc_flash_res; /**< flash shadow */
73 /* register space access macros */
74 #define SPI_BARRIER_WRITE(sc) bus_barrier((sc)->sc_res, 0, 0, \
75 BUS_SPACE_BARRIER_WRITE)
76 #define SPI_BARRIER_READ(sc) bus_barrier((sc)->sc_res, 0, 0, \
77 BUS_SPACE_BARRIER_READ)
78 #define SPI_BARRIER_RW(sc) bus_barrier((sc)->sc_res, 0, 0, \
79 BUS_SPACE_BARRIER_READ | \
80 BUS_SPACE_BARRIER_WRITE)
82 #define SPI_WRITE(sc, reg, val) bus_write_4(sc->sc_res, (reg), (val));
84 #define SPI_READ(sc, reg) bus_read_4(sc->sc_res, (reg))
86 #define SPI_SET_BITS(sc, reg, bits) \
87 SPI_WRITE(sc, reg, SPI_READ(sc, (reg)) | (bits))
89 #define SPI_CLEAR_BITS(sc, reg, bits) \
90 SPI_WRITE(sc, reg, SPI_READ(sc, (reg)) & ~(bits))
92 #endif /* _BHND_CORES_CHIPC_CHIPC_SPI_H_ */