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The ngPIXIS is an FPGA used on the reference boards of most Freescale PowerPC SOCs. Although programming the ngPIXIS is mostly standard on all boards that have it, the P1022DS is unique in that the ngPIXIS needs to be programmed in "indirect" mode whenever the video display (DIU) is active. To support indirect mode, and to make it easier to support other quirks on future reference boards, the low-level ngPIXIS functions are all marked as weak, so that board-specific code can override any of them. We take advantage of this feature on the P1022DS, so that we can properly reset the board when the DIU is active. Signed-off-by: Timur Tabi <timur@freescale.com> Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
64 lines
1.5 KiB
C
64 lines
1.5 KiB
C
/**
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* Copyright 2010-2011 Freescale Semiconductor
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* Author: Timur Tabi <timur@freescale.com>
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the Free
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* Software Foundation; either version 2 of the License, or (at your option)
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* any later version.
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*
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* This file provides support for the ngPIXIS, a board-specific FPGA used on
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* some Freescale reference boards.
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*/
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/* ngPIXIS register set. Hopefully, this won't change too much over time.
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* Feel free to add board-specific #ifdefs where necessary.
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*/
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typedef struct ngpixis {
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u8 id;
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u8 arch;
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u8 scver;
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u8 csr;
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u8 rst;
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u8 res1;
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u8 aux;
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u8 spd;
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u8 brdcfg0;
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u8 brdcfg1; /* On some boards, this register is called 'dma' */
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u8 addr;
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u8 res2[2];
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u8 data;
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u8 led;
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u8 res3;
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u8 vctl;
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u8 vstat;
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u8 vcfgen0;
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u8 res4;
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u8 ocmcsr;
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u8 ocmmsg;
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u8 gmdbg;
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u8 res5[2];
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u8 sclk[3];
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u8 dclk[3];
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u8 watch;
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struct {
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u8 sw;
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u8 en;
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} s[8];
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} __attribute__ ((packed)) ngpixis_t;
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/* Pointer to the PIXIS register set */
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#define pixis ((ngpixis_t *)PIXIS_BASE)
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/* The PIXIS SW register that corresponds to board switch X, where x >= 1 */
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#define PIXIS_SW(x) (pixis->s[(x) - 1].sw)
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/* The PIXIS EN register that corresponds to board switch X, where x >= 1 */
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#define PIXIS_EN(x) (pixis->s[(x) - 1].en)
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u8 pixis_read(unsigned int reg);
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void pixis_write(unsigned int reg, u8 value);
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#define PIXIS_READ(reg) pixis_read(offsetof(ngpixis_t, reg))
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#define PIXIS_WRITE(reg, value) pixis_write(offsetof(ngpixis_t, reg), value)
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