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      1 /*	$NetBSD: netslot.c,v 1.12 2023/12/20 06:13:59 thorpej Exp $	*/
      2 
      3 /*
      4  * Copyright (c) 1994-1996 Mark Brinicombe.
      5  * Copyright (c) 1994 Brini.
      6  * All rights reserved.
      7  *
      8  * Redistribution and use in source and binary forms, with or without
      9  * modification, are permitted provided that the following conditions
     10  * are met:
     11  * 1. Redistributions of source code must retain the above copyright
     12  *    notice, this list of conditions and the following disclaimer.
     13  * 2. Redistributions in binary form must reproduce the above copyright
     14  *    notice, this list of conditions and the following disclaimer in the
     15  *    documentation and/or other materials provided with the distribution.
     16  * 3. All advertising materials mentioning features or use of this software
     17  *    must display the following acknowledgement:
     18  *	This product includes software developed by Brini.
     19  * 4. The name of the company nor the name of the author may be used to
     20  *    endorse or promote products derived from this software without specific
     21  *    prior written permission.
     22  *
     23  * THIS SOFTWARE IS PROVIDED BY BRINI ``AS IS'' AND ANY EXPRESS OR IMPLIED
     24  * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
     25  * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
     26  * IN NO EVENT SHALL BRINI OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
     27  * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
     28  * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
     29  * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     30  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     31  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     32  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     33  * SUCH DAMAGE.
     34  */
     35 
     36 #include <sys/param.h>
     37 
     38 __KERNEL_RCSID(1, "$NetBSD: netslot.c,v 1.12 2023/12/20 06:13:59 thorpej Exp $");
     39 
     40 #include <sys/systm.h>
     41 #include <sys/kernel.h>
     42 #include <sys/conf.h>
     43 #include <sys/device.h>
     44 #include <uvm/uvm_extern.h>
     45 #include <machine/io.h>
     46 #include <machine/intr.h>
     47 #include <machine/bootconfig.h>
     48 #include <arm/iomd/iomdreg.h>
     49 #include <arm/iomd/iomdvar.h>
     50 #include <dev/podulebus/podulebus.h>
     51 #include <dev/podulebus/podules.h>
     52 
     53 #define WriteByte(a, b) \
     54     *((volatile unsigned char *)(a)) = (b)
     55 #define ReadByte(a) \
     56     (*((volatile unsigned char *)(a)))
     57 
     58 u_int netslotread(u_int, int);
     59 
     60 u_int
     61 netslotread(u_int address, int offset)
     62 {
     63 	static int netslotoffset = -1;
     64 
     65 	offset = offset >> 2;
     66 	if (netslotoffset == -1 || offset < netslotoffset) {
     67 		WriteByte(address, 0);
     68 		netslotoffset = 0;
     69 	}
     70 	while (netslotoffset < offset) {
     71 		(void)ReadByte(address);
     72 		++netslotoffset;
     73 	}
     74 	++netslotoffset;
     75 	return(ReadByte(address));
     76 }
     77 
     78 void
     79 netslotscan(device_t dev)
     80 {
     81 	podule_t *podule;
     82 	volatile u_char *address;
     83 
     84 	/* Only one netslot atm */
     85 
     86 	/* Reset the address counter */
     87 
     88 	WriteByte(NETSLOT_BASE, 0x00);
     89 
     90 	address = (u_char *)NETSLOT_BASE;
     91 
     92 	podule = &podules[MAX_PODULES];
     93 
     94 	podule->fast_base = NETSLOT_BASE;
     95 	podule->medium_base = NETSLOT_BASE;
     96 	podule->slow_base = NETSLOT_BASE;
     97 	podule->sync_base = NETSLOT_BASE;
     98 	podule->mod_base = NETSLOT_BASE;
     99 	podule->easi_base = 0;
    100 	podule->attached = 0;
    101 	podule->slottype = SLOT_NONE;
    102 	podule->podulenum = MAX_PODULES;
    103 	podule->interrupt = IRQ_NETSLOT;
    104 	podule->read_rom = netslotread;
    105 	podule->dma_channel = -1;
    106 	podule->dma_interrupt = -1;
    107 	podule->description[0] = 0;
    108 
    109 	/* XXX - Really needs to be linked to a DMA manager */
    110 	if (IOMD_ID == RPC600_IOMD_ID)
    111 		podule->dma_channel = 0;
    112 
    113 	/* Get information from the podule header */
    114 
    115 	podule->flags0 = *address;
    116 	podule->flags1 = *address;
    117 	podule->reserved = *address;
    118 	podule->product = *address;
    119 	podule->product += (*address << 8);
    120 	podule->manufacturer = *address;
    121 	podule->manufacturer += (*address << 8);
    122 	podule->country = *address;
    123 	if (podule->flags1 & PODULE_FLAGS_IS) {
    124 		podule->irq_mask = *address;
    125 		podule->irq_addr = *address;
    126 		podule->irq_addr += (*address << 8);
    127 		podule->irq_addr += (*address << 16);
    128 		podule->irq_addr += podule->slow_base;
    129 		if (podule->irq_mask == 0)
    130 			podule->irq_mask = 0x01;
    131 		podule->fiq_mask = *address;
    132 		podule->fiq_addr = *address;
    133 		podule->fiq_addr += (*address << 8);
    134 		podule->fiq_addr += (*address << 16);
    135 		podule->fiq_addr += podule->slow_base;
    136 		if (podule->fiq_mask == 0)
    137 			podule->fiq_mask = 0x04;
    138 	} else {
    139 		podule->irq_addr = podule->slow_base;
    140 		podule->irq_mask = 0x01;
    141 		podule->fiq_addr = podule->slow_base;
    142 		podule->fiq_mask = 0x04;
    143 	}
    144 
    145 	poduleexamine(podule, dev, SLOT_NET);
    146 }
    147 
    148 void
    149 netslot_ea(uint8_t *buffer)
    150 {
    151 	/* Build station address from machine ID */
    152 	buffer[0] = 0x00;
    153 	buffer[1] = 0x00;
    154 	buffer[2] = 0xa4;
    155 	buffer[3] = bootconfig.machine_id[2] + 0x10;
    156 	buffer[4] = bootconfig.machine_id[1];
    157 	buffer[5] = bootconfig.machine_id[0];
    158 }
    159