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/* |
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* Copyright (C) 2004-2005 Anders Gavare. 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 are met: |
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* |
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* 1. 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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* 2. 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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* 3. 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 AND CONTRIBUTORS ``AS IS'' AND |
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE |
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
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* SUCH DAMAGE. |
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* |
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* |
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* $Id: dev_wdc.c,v 1.33 2005/04/14 20:55:23 debug Exp $ |
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* |
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* Standard IDE controller. |
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*/ |
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|
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#include <stdio.h> |
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#include <stdlib.h> |
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#include <string.h> |
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|
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#include "console.h" |
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#include "cop0.h" |
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#include "cpu.h" |
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#include "devices.h" |
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#include "diskimage.h" |
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#include "machine.h" |
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#include "memory.h" |
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#include "misc.h" |
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|
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#include "wdcreg.h" |
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|
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|
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#define WDC_TICK_SHIFT 14 |
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#define WDC_INBUF_SIZE (512*257) |
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|
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/* INT_DELAY=2 to be safe, 1 is faster but maybe buggy. */ |
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#define INT_DELAY 1 |
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|
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/* #define debug fatal */ |
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/* #define DATA_DEBUG */ |
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|
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struct wdc_data { |
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int irq_nr; |
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int base_drive; |
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|
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int delayed_interrupt; |
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|
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unsigned char identify_struct[512]; |
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|
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unsigned char inbuf[WDC_INBUF_SIZE]; |
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int inbuf_head; |
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int inbuf_tail; |
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|
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int write_in_progress; |
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int write_count; |
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int64_t write_offset; |
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|
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int error; |
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int precomp; |
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int seccnt; |
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int sector; |
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int cyl_lo; |
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int cyl_hi; |
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int sectorsize; |
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int lba; |
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int drive; |
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int head; |
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int cur_command; |
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}; |
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|
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|
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/* |
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* dev_wdc_tick(): |
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*/ |
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void dev_wdc_tick(struct cpu *cpu, void *extra) |
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{ |
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struct wdc_data *d = extra; |
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|
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if (d->delayed_interrupt) { |
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d->delayed_interrupt --; |
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|
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if (d->delayed_interrupt == 0) |
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cpu_interrupt(cpu, d->irq_nr); |
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} |
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} |
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|
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|
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/* |
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* wdc_addtoinbuf(): |
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* |
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* Write to the inbuf at its head, read at its tail. |
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*/ |
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static void wdc_addtoinbuf(struct wdc_data *d, int c) |
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{ |
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d->inbuf[d->inbuf_head] = c; |
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|
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d->inbuf_head = (d->inbuf_head + 1) % WDC_INBUF_SIZE; |
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if (d->inbuf_head == d->inbuf_tail) |
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fatal("WARNING! wdc inbuf overrun\n"); |
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} |
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|
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|
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/* |
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* wdc_get_inbuf(): |
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* |
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* Read from the tail of inbuf. |
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*/ |
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static uint64_t wdc_get_inbuf(struct wdc_data *d) |
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{ |
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int c = d->inbuf[d->inbuf_tail]; |
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|
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if (d->inbuf_head == d->inbuf_tail) { |
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fatal("WARNING! someone is reading too much from the " |
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"wdc inbuf!\n"); |
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return -1; |
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} |
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|
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d->inbuf_tail = (d->inbuf_tail + 1) % WDC_INBUF_SIZE; |
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return c; |
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} |
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|
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|
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/* |
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* wdc_initialize_identify_struct(d): |
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*/ |
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static void wdc_initialize_identify_struct(struct cpu *cpu, struct wdc_data *d) |
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{ |
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uint64_t total_size, cyls; |
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|
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total_size = diskimage_getsize(cpu->machine, d->drive + d->base_drive); |
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|
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memset(d->identify_struct, 0, sizeof(d->identify_struct)); |
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|
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cyls = total_size / (63 * 16 * 512); |
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if (cyls * 63*16*512 < total_size) |
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cyls ++; |
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|
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/* Offsets are in 16-bit WORDS! High byte, then low. */ |
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|
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/* 0: general flags */ |
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d->identify_struct[2 * 0 + 0] = 0; |
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d->identify_struct[2 * 0 + 1] = 1 << 6; |
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|
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/* 1: nr of cylinders */ |
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d->identify_struct[2 * 1 + 0] = (cyls >> 8); |
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d->identify_struct[2 * 1 + 1] = cyls & 255; |
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|
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/* 3: nr of heads */ |
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d->identify_struct[2 * 3 + 0] = 0; |
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d->identify_struct[2 * 3 + 1] = 16; |
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|
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/* 6: sectors per track */ |
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d->identify_struct[2 * 6 + 0] = 0; |
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d->identify_struct[2 * 6 + 1] = 63; |
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|
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/* 10-19: Serial number */ |
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memcpy(&d->identify_struct[2 * 10], "S/N 1234-5678 ", 20); |
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|
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/* 23-26: Firmware version */ |
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memcpy(&d->identify_struct[2 * 23], "VER 1.0 ", 8); |
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|
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/* 27-46: Model number */ |
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memcpy(&d->identify_struct[2 * 27], |
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"Fake GXemul IDE disk ", 40); |
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/* TODO: Use the diskimage's filename instead? */ |
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|
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/* 47: max sectors per multitransfer */ |
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d->identify_struct[2 * 47 + 0] = 0x80; |
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d->identify_struct[2 * 47 + 1] = 1; /* 1 or 16? */ |
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|
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/* 57-58: current capacity in sectors */ |
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d->identify_struct[2 * 57 + 0] = ((total_size / 512) >> 24) % 255; |
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d->identify_struct[2 * 57 + 1] = ((total_size / 512) >> 16) % 255; |
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d->identify_struct[2 * 58 + 0] = ((total_size / 512) >> 8) % 255; |
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d->identify_struct[2 * 58 + 1] = (total_size / 512) & 255; |
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|
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/* 60-61: total nr of addresable sectors */ |
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d->identify_struct[2 * 60 + 0] = ((total_size / 512) >> 24) % 255; |
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d->identify_struct[2 * 60 + 1] = ((total_size / 512) >> 16) % 255; |
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d->identify_struct[2 * 61 + 0] = ((total_size / 512) >> 8) % 255; |
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d->identify_struct[2 * 61 + 1] = (total_size / 512) & 255; |
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|
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} |
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|
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|
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/* |
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* status_byte(): |
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*/ |
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static int status_byte(struct wdc_data *d, struct cpu *cpu) |
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{ |
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int odata = 0; |
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|
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if (diskimage_exist(cpu->machine, |
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d->drive + d->base_drive)) |
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odata |= WDCS_DRDY; |
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if (d->inbuf_head != d->inbuf_tail) |
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odata |= WDCS_DRQ; |
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if (d->write_in_progress) |
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odata |= WDCS_DRQ; |
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if (d->error) |
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odata |= WDCS_ERR; |
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|
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#if 0 |
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/* |
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* TODO: Is this correct behaviour? |
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* |
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* NetBSD/cobalt seems to want it, but Linux on MobilePro does not. |
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*/ |
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if (!diskimage_exist(cpu->machine, |
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d->drive + d->base_drive)) |
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odata = 0xff; |
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#endif |
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|
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return odata; |
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} |
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|
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|
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/* |
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* dev_wdc_altstatus_access(): |
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*/ |
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int dev_wdc_altstatus_access(struct cpu *cpu, struct memory *mem, |
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uint64_t relative_addr, unsigned char *data, size_t len, |
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int writeflag, void *extra) |
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{ |
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struct wdc_data *d = extra; |
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uint64_t idata = 0, odata = 0; |
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|
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idata = memory_readmax64(cpu, data, len); |
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|
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/* Same as the normal status byte? */ |
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odata = status_byte(d, cpu); |
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|
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if (writeflag==MEM_READ) |
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debug("[ wdc: read from ALTSTATUS: 0x%02x ]\n", |
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(int)odata); |
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else |
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debug("[ wdc: write to ALT. CTRL: 0x%02x ]\n", |
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(int)idata); |
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|
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if (writeflag == MEM_READ) |
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memory_writemax64(cpu, data, len, odata); |
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|
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return 1; |
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} |
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|
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|
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/* |
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* dev_wdc_access(): |
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*/ |
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int dev_wdc_access(struct cpu *cpu, struct memory *mem, |
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uint64_t relative_addr, unsigned char *data, size_t len, |
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int writeflag, void *extra) |
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{ |
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struct wdc_data *d = extra; |
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uint64_t idata = 0, odata = 0; |
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int i; |
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|
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idata = memory_readmax64(cpu, data, len); |
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|
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switch (relative_addr) { |
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|
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case wd_data: /* 0: data */ |
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if (writeflag==MEM_READ) { |
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odata = 0; |
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|
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/* TODO: This is hardcoded for little-endian? */ |
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|
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odata += wdc_get_inbuf(d); |
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if (len >= 2) |
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odata += (wdc_get_inbuf(d) << 8); |
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if (len == 4) { |
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odata += (wdc_get_inbuf(d) << 16); |
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odata += (wdc_get_inbuf(d) << 24); |
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} |
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|
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#ifdef DATA_DEBUG |
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debug("[ wdc: read from DATA: 0x%04x ]\n", odata); |
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#endif |
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|
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if (d->inbuf_tail != d->inbuf_head) |
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d->delayed_interrupt = INT_DELAY; |
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|
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} else { |
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int inbuf_len; |
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#ifdef DATA_DEBUG |
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debug("[ wdc: write to DATA (len=%i): 0x%08lx ]\n", |
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(int)len, (long)idata); |
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#endif |
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if (!d->write_in_progress) { |
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fatal("[ wdc: write to DATA, but not " |
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"expecting any? (len=%i): 0x%08lx ]\n", |
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(int)len, (long)idata); |
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} |
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|
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switch (len) { |
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case 4: wdc_addtoinbuf(d, idata & 0xff); |
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wdc_addtoinbuf(d, (idata >> 8) & 0xff); |
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wdc_addtoinbuf(d, (idata >> 16) & 0xff); |
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wdc_addtoinbuf(d, (idata >> 24) & 0xff); |
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break; |
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case 2: wdc_addtoinbuf(d, idata & 0xff); |
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wdc_addtoinbuf(d, (idata >> 8) & 0xff); |
319 |
break; |
320 |
case 1: wdc_addtoinbuf(d, idata); break; |
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default:fatal("wdc: unimplemented write len %i\n", len); |
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exit(1); |
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} |
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|
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inbuf_len = d->inbuf_head - d->inbuf_tail; |
326 |
while (inbuf_len < 0) |
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inbuf_len += WDC_INBUF_SIZE; |
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|
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#if 0 |
330 |
if ((inbuf_len % (512 * d->write_count)) == 0) { |
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#endif |
332 |
if ((inbuf_len % 512) == 0) { |
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int count = 1; /* d->write_count; */ |
334 |
unsigned char *buf = malloc(count * 512); |
335 |
if (buf == NULL) { |
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fprintf(stderr, "out of memory\n"); |
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exit(1); |
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} |
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|
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for (i=0; i<512 * count; i++) |
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buf[i] = wdc_get_inbuf(d); |
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|
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diskimage_access(cpu->machine, |
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d->drive + d->base_drive, 1, |
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d->write_offset, buf, 512 * count); |
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free(buf); |
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|
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d->write_count --; |
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d->write_offset += 512; |
350 |
|
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d->delayed_interrupt = INT_DELAY; |
352 |
|
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if (d->write_count == 0) |
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d->write_in_progress = 0; |
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} |
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} |
357 |
break; |
358 |
|
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case wd_error: /* 1: error (r), precomp (w) */ |
360 |
if (writeflag==MEM_READ) { |
361 |
odata = d->error; |
362 |
debug("[ wdc: read from ERROR: 0x%02x ]\n", odata); |
363 |
/* TODO: is the error value cleared on read? */ |
364 |
d->error = 0; |
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} else { |
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d->precomp = idata; |
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debug("[ wdc: write to PRECOMP: 0x%02x ]\n", idata); |
368 |
} |
369 |
break; |
370 |
|
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case wd_seccnt: /* 2: sector count */ |
372 |
if (writeflag==MEM_READ) { |
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odata = d->seccnt; |
374 |
debug("[ wdc: read from SECCNT: 0x%02x ]\n", odata); |
375 |
} else { |
376 |
d->seccnt = idata; |
377 |
debug("[ wdc: write to SECCNT: 0x%02x ]\n", idata); |
378 |
} |
379 |
break; |
380 |
|
381 |
case wd_sector: /* 3: first sector */ |
382 |
if (writeflag==MEM_READ) { |
383 |
odata = d->sector; |
384 |
debug("[ wdc: read from SECTOR: 0x%02x ]\n", odata); |
385 |
} else { |
386 |
d->sector = idata; |
387 |
debug("[ wdc: write to SECTOR: 0x%02x ]\n", idata); |
388 |
} |
389 |
break; |
390 |
|
391 |
case wd_cyl_lo: /* 4: cylinder low */ |
392 |
if (writeflag==MEM_READ) { |
393 |
odata = d->cyl_lo; |
394 |
debug("[ wdc: read from CYL_LO: 0x%02x ]\n", odata); |
395 |
} else { |
396 |
d->cyl_lo = idata; |
397 |
debug("[ wdc: write to CYL_LO: 0x%02x ]\n", idata); |
398 |
} |
399 |
break; |
400 |
|
401 |
case wd_cyl_hi: /* 5: cylinder low */ |
402 |
if (writeflag==MEM_READ) { |
403 |
odata = d->cyl_hi; |
404 |
debug("[ wdc: read from CYL_HI: 0x%02x ]\n", odata); |
405 |
} else { |
406 |
d->cyl_hi = idata; |
407 |
debug("[ wdc: write to CYL_HI: 0x%02x ]\n", idata); |
408 |
} |
409 |
break; |
410 |
|
411 |
case wd_sdh: /* 6: sectorsize/drive/head */ |
412 |
if (writeflag==MEM_READ) { |
413 |
odata = (d->sectorsize << 6) + (d->lba << 5) + |
414 |
(d->drive << 4) + (d->head); |
415 |
debug("[ wdc: read from SDH: 0x%02x (sectorsize %i," |
416 |
" lba=%i, drive %i, head %i) ]\n", (int)odata, |
417 |
d->sectorsize, d->lba, d->drive, d->head); |
418 |
} else { |
419 |
d->sectorsize = (idata >> 6) & 3; |
420 |
d->lba = (idata >> 5) & 1; |
421 |
d->drive = (idata >> 4) & 1; |
422 |
d->head = idata & 0xf; |
423 |
debug("[ wdc: write to SDH: 0x%02x (sectorsize %i," |
424 |
" lba=%i, drive %i, head %i) ]\n", (int)idata, |
425 |
d->sectorsize, d->lba, d->drive, d->head); |
426 |
} |
427 |
break; |
428 |
|
429 |
case wd_command: /* 7: command or status */ |
430 |
if (writeflag==MEM_READ) { |
431 |
odata = status_byte(d, cpu); |
432 |
#if 1 |
433 |
debug("[ wdc: read from STATUS: 0x%02x ]\n", odata); |
434 |
#endif |
435 |
|
436 |
cpu_interrupt_ack(cpu, d->irq_nr); |
437 |
d->delayed_interrupt = 0; |
438 |
} else { |
439 |
debug("[ wdc: write to COMMAND: 0x%02x ]\n", idata); |
440 |
d->cur_command = idata; |
441 |
|
442 |
/* TODO: Is this correct behaviour? */ |
443 |
if (!diskimage_exist(cpu->machine, |
444 |
d->drive + d->base_drive)) { |
445 |
d->error |= WDCE_ABRT; |
446 |
d->delayed_interrupt = INT_DELAY; |
447 |
break; |
448 |
} |
449 |
|
450 |
/* Handle the command: */ |
451 |
switch (d->cur_command) { |
452 |
case WDCC_READ: |
453 |
debug("[ wdc: READ from drive %i, head %i, " |
454 |
"cylinder %i, sector %i, nsecs %i ]\n", |
455 |
d->drive, d->head, d->cyl_hi*256+d->cyl_lo, |
456 |
d->sector, d->seccnt); |
457 |
/* TODO: HAHA! This should be removed |
458 |
quickly */ |
459 |
{ |
460 |
unsigned char buf[512*256]; |
461 |
int cyl = d->cyl_hi * 256+ d->cyl_lo; |
462 |
int count = d->seccnt? d->seccnt : 256; |
463 |
uint64_t offset = 512 * (d->sector - 1 |
464 |
+ d->head * 63 + 16*63*cyl); |
465 |
|
466 |
#if 0 |
467 |
/* LBA: */ |
468 |
if (d->lba) |
469 |
offset = 512 * (((d->head & 0xf) << 24) + (cyl << 8) + d->sector); |
470 |
printf("WDC read from offset %lli\n", (long long)offset); |
471 |
#endif |
472 |
diskimage_access(cpu->machine, |
473 |
d->drive + d->base_drive, 0, |
474 |
offset, buf, 512 * count); |
475 |
/* TODO: result code */ |
476 |
for (i=0; i<512 * count; i++) |
477 |
wdc_addtoinbuf(d, buf[i]); |
478 |
} |
479 |
d->delayed_interrupt = INT_DELAY; |
480 |
break; |
481 |
case WDCC_WRITE: |
482 |
debug("[ wdc: WRITE to drive %i, head %i, " |
483 |
"cylinder %i, sector %i, nsecs %i ]\n", |
484 |
d->drive, d->head, d->cyl_hi*256+d->cyl_lo, |
485 |
d->sector, d->seccnt); |
486 |
/* TODO: HAHA! This should be removed |
487 |
quickly */ |
488 |
{ |
489 |
int cyl = d->cyl_hi * 256+ d->cyl_lo; |
490 |
int count = d->seccnt? d->seccnt : 256; |
491 |
uint64_t offset = 512 * (d->sector - 1 |
492 |
+ d->head * 63 + 16*63*cyl); |
493 |
|
494 |
#if 0 |
495 |
/* LBA: */ |
496 |
if (d->lba) |
497 |
offset = 512 * (((d->head & 0xf) << 24) + (cyl << 8) + d->sector); |
498 |
printf("WDC write to offset %lli\n", (long long)offset); |
499 |
#endif |
500 |
|
501 |
d->write_in_progress = 1; |
502 |
d->write_count = count; |
503 |
d->write_offset = offset; |
504 |
|
505 |
/* TODO: result code */ |
506 |
} |
507 |
/* TODO: Really interrupt here? */ |
508 |
#if 0 |
509 |
d->delayed_interrupt = INT_DELAY; |
510 |
#endif |
511 |
break; |
512 |
|
513 |
case WDCC_IDP: /* Initialize drive parameters */ |
514 |
debug("[ wdc: IDP drive %i (TODO) ]\n", |
515 |
d->drive); |
516 |
/* TODO */ |
517 |
d->delayed_interrupt = INT_DELAY; |
518 |
break; |
519 |
case SET_FEATURES: |
520 |
fatal("[ wdc: SET_FEATURES drive %i (TODO), " |
521 |
"feature 0x%02x ]\n", d->drive, d->precomp); |
522 |
/* TODO */ |
523 |
switch (d->precomp) { |
524 |
case WDSF_SET_MODE: |
525 |
fatal("[ wdc: WDSF_SET_MODE drive %i, " |
526 |
"pio/dma flags 0x%02x ]\n", |
527 |
d->drive, d->seccnt); |
528 |
break; |
529 |
default: |
530 |
d->error |= WDCE_ABRT; |
531 |
} |
532 |
/* TODO: always interrupt? */ |
533 |
d->delayed_interrupt = INT_DELAY; |
534 |
break; |
535 |
case WDCC_RECAL: |
536 |
debug("[ wdc: RECAL drive %i ]\n", d->drive); |
537 |
d->delayed_interrupt = INT_DELAY; |
538 |
break; |
539 |
case WDCC_IDENTIFY: |
540 |
debug("[ wdc: IDENTIFY drive %i ]\n", d->drive); |
541 |
wdc_initialize_identify_struct(cpu, d); |
542 |
/* The IDENTIFY data block is sent out |
543 |
in low/high byte order: */ |
544 |
for (i=0; i<sizeof(d->identify_struct); i+=2) { |
545 |
wdc_addtoinbuf(d, d->identify_struct |
546 |
[i+1]); |
547 |
wdc_addtoinbuf(d, d->identify_struct |
548 |
[i+0]); |
549 |
} |
550 |
d->delayed_interrupt = INT_DELAY; |
551 |
break; |
552 |
case WDCC_IDLE_IMMED: |
553 |
debug("[ wdc: IDLE_IMMED drive %i ]\n", |
554 |
d->drive); |
555 |
/* TODO: interrupt here? */ |
556 |
d->delayed_interrupt = INT_DELAY; |
557 |
break; |
558 |
default: |
559 |
/* TODO */ |
560 |
d->error |= WDCE_ABRT; |
561 |
|
562 |
fatal("[ wdc: unknown command 0x%02x (" |
563 |
"drive %i, head %i, cylinder %i, sector %i," |
564 |
" nsecs %i) ]\n", d->cur_command, d->drive, |
565 |
d->head, d->cyl_hi*256+d->cyl_lo, |
566 |
d->sector, d->seccnt); |
567 |
exit(1); |
568 |
} |
569 |
} |
570 |
break; |
571 |
|
572 |
default: |
573 |
if (writeflag==MEM_READ) |
574 |
debug("[ wdc: read from 0x%02x ]\n", |
575 |
(int)relative_addr); |
576 |
else |
577 |
debug("[ wdc: write to 0x%02x: 0x%02x ]\n", |
578 |
(int)relative_addr, (int)idata); |
579 |
} |
580 |
|
581 |
if (writeflag == MEM_READ) |
582 |
memory_writemax64(cpu, data, len, odata); |
583 |
|
584 |
return 1; |
585 |
} |
586 |
|
587 |
|
588 |
/* |
589 |
* dev_wdc_init(): |
590 |
* |
591 |
* base_drive should be 0 for the primary device, and 2 for the secondary. |
592 |
*/ |
593 |
void dev_wdc_init(struct machine *machine, struct memory *mem, |
594 |
uint64_t baseaddr, int irq_nr, int base_drive) |
595 |
{ |
596 |
struct wdc_data *d; |
597 |
uint64_t alt_status_addr; |
598 |
|
599 |
d = malloc(sizeof(struct wdc_data)); |
600 |
if (d == NULL) { |
601 |
fprintf(stderr, "out of memory\n"); |
602 |
exit(1); |
603 |
} |
604 |
memset(d, 0, sizeof(struct wdc_data)); |
605 |
d->irq_nr = irq_nr; |
606 |
d->base_drive = base_drive; |
607 |
|
608 |
alt_status_addr = baseaddr + 0x206; |
609 |
|
610 |
/* Special hack for pcic/hpcmips: TODO: Fix */ |
611 |
if (baseaddr == 0x14000180) |
612 |
alt_status_addr = 0x14000386; |
613 |
|
614 |
memory_device_register(mem, "wdc_altstatus", alt_status_addr, 2, |
615 |
dev_wdc_altstatus_access, d, MEM_DEFAULT, NULL); |
616 |
memory_device_register(mem, "wdc", baseaddr, DEV_WDC_LENGTH, |
617 |
dev_wdc_access, d, MEM_DEFAULT, NULL); |
618 |
|
619 |
machine_add_tickfunction(machine, dev_wdc_tick, |
620 |
d, WDC_TICK_SHIFT); |
621 |
} |
622 |
|