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      1 /*	$NetBSD: sif.c,v 1.13 2023/11/05 21:54:27 andvar Exp $	*/
      2 
      3 /*-
      4  * Copyright (c) 2001 The NetBSD Foundation, Inc.
      5  * All rights reserved.
      6  *
      7  * This code is derived from software contributed to The NetBSD Foundation
      8  * by UCHIYAMA Yasushi.
      9  *
     10  * Redistribution and use in source and binary forms, with or without
     11  * modification, are permitted provided that the following conditions
     12  * are met:
     13  * 1. Redistributions of source code must retain the above copyright
     14  *    notice, this list of conditions and the following disclaimer.
     15  * 2. Redistributions in binary form must reproduce the above copyright
     16  *    notice, this list of conditions and the following disclaimer in the
     17  *    documentation and/or other materials provided with the distribution.
     18  *
     19  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
     20  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     21  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     22  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
     23  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     24  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     25  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     26  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     27  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     28  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     29  * POSSIBILITY OF SUCH DAMAGE.
     30  */
     31 
     32 #include <sys/cdefs.h>
     33 __KERNEL_RCSID(0, "$NetBSD: sif.c,v 1.13 2023/11/05 21:54:27 andvar Exp $");
     34 
     35 #include "debug_playstation2.h"
     36 
     37 #include <sys/intr.h>
     38 #include <sys/param.h>
     39 #include <sys/systm.h>
     40 #include <sys/kernel.h>
     41 
     42 #include <playstation2/playstation2/sifbios.h>
     43 #include <playstation2/ee/dmacvar.h>
     44 #include <playstation2/ee/sifvar.h>
     45 
     46 #ifdef SIF_DEBUG
     47 int __spd_total_alloc;
     48 int	sif_debug = 1;
     49 #define	DPRINTF(fmt, args...)						\
     50 	if (sif_debug)							\
     51 		printf("%s: " fmt, __func__ , ##args)
     52 #define	DPRINTFN(n, arg)						\
     53 	if (sif_debug > (n))						\
     54 n		printf("%s: " fmt, __func__ , ##args)
     55 #else
     56 #define	DPRINTF(arg...)		((void)0)
     57 #define DPRINTFN(n, arg...)	((void)0)
     58 #endif
     59 
     60 #define ROUND64(x)	((((u_int32_t)(x)) + 63) & ~64)
     61 #define BCD_TO_DECIMAL(x)						\
     62 ({									\
     63 	typeof(x) x_ = x;						\
     64 	(((x_) >> 4) * 10 + ((x_) & 0xf));				\
     65 })
     66 #define MAJOR(x)	BCD_TO_DECIMAL(((x) >> 8) & 0xff)
     67 #define MINOR(x)	BCD_TO_DECIMAL((x) & 0xff)
     68 
     69 void
     70 sif_init(void)
     71 {
     72 	u_int32_t vers;
     73 
     74 	vers = sifbios_getver();
     75 	printf("PlayStation 2 SIF BIOS version %d.%d\n",
     76 	    MAJOR(vers), MINOR(vers));
     77 
     78 	/* Initialize SIF */
     79 	if (sifdma_init() < 0)
     80 		panic("SIFDMA");
     81 	if (sifcmd_init() < 0)
     82 		panic("SIFCMD");
     83 	dmac_intr_establish(D_CH5_SIF0, IPL_TTY, sifcmd_intr, 0);
     84 	if (sifrpc_init() < 0)
     85 		panic("SIFRPC");
     86 	if (iopmem_init() < 0)
     87 		panic("IOP Memory");
     88 }
     89 
     90 void
     91 sif_exit(void)
     92 {
     93 
     94 	sifrpc_exit();
     95 	sifcmd_exit();
     96 	dmac_intr_disestablish((void *)D_CH5_SIF0);
     97 	sifdma_exit();
     98 }
     99 
    100 int
    101 iopdma_allocate_buffer(struct iopdma_segment *seg, size_t size)
    102 {
    103 	/*
    104 	 * To avoid cache inconsistecy as the result of DMA(to memory),
    105 	 * DMA buffer size is set to multiple of CPU cache line size (64B)
    106 	 * and aligned to cache line.
    107 	 */
    108 	seg->size = ROUND64(size);
    109 
    110 	seg->iop_paddr = iopmem_alloc(seg->size);
    111 
    112 	if (seg->iop_paddr == 0) {
    113 		printf("%s: can't allocate IOP memory.\n", __func__);
    114 		DPRINTF("request = %lu byte, current total = %#x\n",
    115 		    size, __spd_total_alloc);
    116 		return (1);
    117 	}
    118 
    119 	seg->ee_vaddr = IOPPHYS_TO_EEKV(seg->iop_paddr);
    120 
    121 #ifdef SIF_DEBUG
    122 	__spd_total_alloc += size;
    123 #endif
    124 	DPRINTF("0x%08x+%#lx (total=%#x)\n", seg->iop_paddr, size,
    125 	    __spd_total_alloc);
    126 
    127 	KDASSERT((seg->ee_vaddr & 63) == 0);
    128 
    129 	return (0);
    130 }
    131 
    132 void
    133 iopdma_free_buffer(struct iopdma_segment *seg)
    134 {
    135 	int ret __unused;
    136 
    137 	ret = iopmem_free(seg->iop_paddr);
    138 #ifdef SIF_DEBUG
    139 	__spd_total_alloc -= seg->size;
    140 #endif
    141 	DPRINTF("0x%08x (total=%#x, result=%d)\n", seg->iop_paddr,
    142 	    __spd_total_alloc, ret);
    143 }
    144