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982 decky 1
/*
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 * Copyright (C) 2006 Martin Decky
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 * All rights reserved.
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 *
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 * Redistribution and use in source and binary forms, with or without
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 * modification, are permitted provided that the following conditions
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 * are met:
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 *
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 * - Redistributions of source code must retain the above copyright
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 *   notice, this list of conditions and the following disclaimer.
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 * - Redistributions in binary form must reproduce the above copyright
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 *   notice, this list of conditions and the following disclaimer in the
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 *   documentation and/or other materials provided with the distribution.
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 * - The name of the author may not be used to endorse or promote products
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 *   derived from this software without specific prior written permission.
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 *
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 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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 */
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#include <arch/drivers/cuda.h>
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#include <arch/asm.h>
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#define CUDA_PACKET 0x01
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#define CUDA_POWERDOWN 0x0a
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#define RS 0x200
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#define B (0 * RS)
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#define A (1 * RS)
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#define SR (10 * RS)
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#define ACR (11 * RS)
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#define SR_OUT 0x10
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#define TACK 0x10
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#define TIP 0x20
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static volatile __u8 *cuda = (__u8 *) 0xf2000000;
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static void cuda_packet(const __u8 data)
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{
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    cuda[B] = cuda[B] | TIP;
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    cuda[ACR] = cuda[ACR] | SR_OUT;
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    cuda[SR] = CUDA_PACKET;
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    cuda[B] = cuda[B] & ~TIP;
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    cuda[ACR] = cuda[ACR] | SR_OUT;
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    cuda[SR] = data;
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    cuda[B] = cuda[B] | TACK;
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    cuda[B] = cuda[B] | TIP;
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}
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void cpu_halt(void) {
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    cuda_packet(CUDA_POWERDOWN);
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    cpu_sleep();
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}