962 lines
25 KiB
C
962 lines
25 KiB
C
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// SPDX-License-Identifier: GPL-2.0
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/*
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* ESP front-end for Amiga ZORRO SCSI systems.
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*
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* Copyright (C) 1996 Jesper Skov (jskov@cygnus.co.uk)
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*
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* Copyright (C) 2011,2018 Michael Schmitz (schmitz@debian.org) for
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* migration to ESP SCSI core
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*
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* Copyright (C) 2013 Tuomas Vainikka (tuomas.vainikka@aalto.fi) for
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* Blizzard 1230 DMA and probe function fixes
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*/
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/*
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* ZORRO bus code from:
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*/
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/*
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* Detection routine for the NCR53c710 based Amiga SCSI Controllers for Linux.
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* Amiga MacroSystemUS WarpEngine SCSI controller.
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* Amiga Technologies/DKB A4091 SCSI controller.
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*
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* Written 1997 by Alan Hourihane <alanh@fairlite.demon.co.uk>
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* plus modifications of the 53c7xx.c driver to support the Amiga.
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*
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* Rewritten to use 53c700.c by Kars de Jong <jongk@linux-m68k.org>
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*/
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#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
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#include <linux/module.h>
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#include <linux/init.h>
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#include <linux/interrupt.h>
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#include <linux/dma-mapping.h>
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#include <linux/scatterlist.h>
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#include <linux/delay.h>
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#include <linux/zorro.h>
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#include <linux/slab.h>
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#include <asm/page.h>
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#include <asm/pgtable.h>
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#include <asm/cacheflush.h>
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#include <asm/amigahw.h>
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#include <asm/amigaints.h>
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#include <scsi/scsi_host.h>
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#include <scsi/scsi_transport_spi.h>
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#include <scsi/scsi_device.h>
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#include <scsi/scsi_tcq.h>
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#include "esp_scsi.h"
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MODULE_AUTHOR("Michael Schmitz <schmitz@debian.org>");
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MODULE_DESCRIPTION("Amiga Zorro NCR5C9x (ESP) driver");
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MODULE_LICENSE("GPL");
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/* per-board register layout definitions */
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/* Blizzard 1230 DMA interface */
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struct blz1230_dma_registers {
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unsigned char dma_addr; /* DMA address [0x0000] */
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unsigned char dmapad2[0x7fff];
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unsigned char dma_latch; /* DMA latch [0x8000] */
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};
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/* Blizzard 1230II DMA interface */
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struct blz1230II_dma_registers {
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unsigned char dma_addr; /* DMA address [0x0000] */
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unsigned char dmapad2[0xf];
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unsigned char dma_latch; /* DMA latch [0x0010] */
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};
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/* Blizzard 2060 DMA interface */
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struct blz2060_dma_registers {
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unsigned char dma_led_ctrl; /* DMA led control [0x000] */
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unsigned char dmapad1[0x0f];
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unsigned char dma_addr0; /* DMA address (MSB) [0x010] */
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unsigned char dmapad2[0x03];
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unsigned char dma_addr1; /* DMA address [0x014] */
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unsigned char dmapad3[0x03];
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unsigned char dma_addr2; /* DMA address [0x018] */
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unsigned char dmapad4[0x03];
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unsigned char dma_addr3; /* DMA address (LSB) [0x01c] */
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};
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/* DMA control bits */
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#define DMA_WRITE 0x80000000
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/* Cyberstorm DMA interface */
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struct cyber_dma_registers {
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unsigned char dma_addr0; /* DMA address (MSB) [0x000] */
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unsigned char dmapad1[1];
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unsigned char dma_addr1; /* DMA address [0x002] */
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unsigned char dmapad2[1];
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unsigned char dma_addr2; /* DMA address [0x004] */
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unsigned char dmapad3[1];
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unsigned char dma_addr3; /* DMA address (LSB) [0x006] */
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unsigned char dmapad4[0x3fb];
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unsigned char cond_reg; /* DMA cond (ro) [0x402] */
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#define ctrl_reg cond_reg /* DMA control (wo) [0x402] */
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};
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/* DMA control bits */
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#define CYBER_DMA_WRITE 0x40 /* DMA direction. 1 = write */
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#define CYBER_DMA_Z3 0x20 /* 16 (Z2) or 32 (CHIP/Z3) bit DMA transfer */
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/* DMA status bits */
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#define CYBER_DMA_HNDL_INTR 0x80 /* DMA IRQ pending? */
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/* The CyberStorm II DMA interface */
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struct cyberII_dma_registers {
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unsigned char cond_reg; /* DMA cond (ro) [0x000] */
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#define ctrl_reg cond_reg /* DMA control (wo) [0x000] */
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unsigned char dmapad4[0x3f];
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unsigned char dma_addr0; /* DMA address (MSB) [0x040] */
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unsigned char dmapad1[3];
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unsigned char dma_addr1; /* DMA address [0x044] */
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unsigned char dmapad2[3];
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unsigned char dma_addr2; /* DMA address [0x048] */
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unsigned char dmapad3[3];
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unsigned char dma_addr3; /* DMA address (LSB) [0x04c] */
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};
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/* Fastlane DMA interface */
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struct fastlane_dma_registers {
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unsigned char cond_reg; /* DMA status (ro) [0x0000] */
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#define ctrl_reg cond_reg /* DMA control (wo) [0x0000] */
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char dmapad1[0x3f];
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unsigned char clear_strobe; /* DMA clear (wo) [0x0040] */
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};
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/*
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* The controller registers can be found in the Z2 config area at these
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* offsets:
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*/
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#define FASTLANE_ESP_ADDR 0x1000001
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/* DMA status bits */
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#define FASTLANE_DMA_MINT 0x80
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#define FASTLANE_DMA_IACT 0x40
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#define FASTLANE_DMA_CREQ 0x20
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/* DMA control bits */
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#define FASTLANE_DMA_FCODE 0xa0
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#define FASTLANE_DMA_MASK 0xf3
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#define FASTLANE_DMA_WRITE 0x08 /* 1 = write */
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#define FASTLANE_DMA_ENABLE 0x04 /* Enable DMA */
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#define FASTLANE_DMA_EDI 0x02 /* Enable DMA IRQ ? */
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#define FASTLANE_DMA_ESI 0x01 /* Enable SCSI IRQ */
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/*
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* private data used for driver
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*/
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struct zorro_esp_priv {
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struct esp *esp; /* our ESP instance - for Scsi_host* */
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void __iomem *board_base; /* virtual address (Zorro III board) */
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int zorro3; /* board is Zorro III */
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unsigned char ctrl_data; /* shadow copy of ctrl_reg */
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};
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/*
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* On all implementations except for the Oktagon, padding between ESP
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* registers is three bytes.
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* On Oktagon, it is one byte - use a different accessor there.
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*
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* Oktagon needs PDMA - currently unsupported!
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*/
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static void zorro_esp_write8(struct esp *esp, u8 val, unsigned long reg)
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{
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writeb(val, esp->regs + (reg * 4UL));
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}
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static u8 zorro_esp_read8(struct esp *esp, unsigned long reg)
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{
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return readb(esp->regs + (reg * 4UL));
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}
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static int zorro_esp_irq_pending(struct esp *esp)
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{
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/* check ESP status register; DMA has no status reg. */
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if (zorro_esp_read8(esp, ESP_STATUS) & ESP_STAT_INTR)
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return 1;
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return 0;
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}
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static int cyber_esp_irq_pending(struct esp *esp)
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{
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struct cyber_dma_registers __iomem *dregs = esp->dma_regs;
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unsigned char dma_status = readb(&dregs->cond_reg);
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/* It's important to check the DMA IRQ bit in the correct way! */
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return ((zorro_esp_read8(esp, ESP_STATUS) & ESP_STAT_INTR) &&
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(dma_status & CYBER_DMA_HNDL_INTR));
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}
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static int fastlane_esp_irq_pending(struct esp *esp)
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{
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struct fastlane_dma_registers __iomem *dregs = esp->dma_regs;
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unsigned char dma_status;
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dma_status = readb(&dregs->cond_reg);
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if (dma_status & FASTLANE_DMA_IACT)
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return 0; /* not our IRQ */
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/* Return non-zero if ESP requested IRQ */
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return (
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(dma_status & FASTLANE_DMA_CREQ) &&
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(!(dma_status & FASTLANE_DMA_MINT)) &&
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(zorro_esp_read8(esp, ESP_STATUS) & ESP_STAT_INTR));
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}
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static u32 zorro_esp_dma_length_limit(struct esp *esp, u32 dma_addr,
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u32 dma_len)
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{
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return dma_len > (1U << 16) ? (1U << 16) : dma_len;
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}
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static u32 fastlane_esp_dma_length_limit(struct esp *esp, u32 dma_addr,
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u32 dma_len)
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{
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/* The old driver used 0xfffc as limit, so do that here too */
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return dma_len > 0xfffc ? 0xfffc : dma_len;
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}
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static void zorro_esp_reset_dma(struct esp *esp)
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{
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/* nothing to do here */
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}
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static void zorro_esp_dma_drain(struct esp *esp)
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{
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/* nothing to do here */
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}
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static void zorro_esp_dma_invalidate(struct esp *esp)
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{
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/* nothing to do here */
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}
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static void fastlane_esp_dma_invalidate(struct esp *esp)
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{
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struct zorro_esp_priv *zep = dev_get_drvdata(esp->dev);
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struct fastlane_dma_registers __iomem *dregs = esp->dma_regs;
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unsigned char *ctrl_data = &zep->ctrl_data;
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*ctrl_data = (*ctrl_data & FASTLANE_DMA_MASK);
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writeb(0, &dregs->clear_strobe);
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z_writel(0, zep->board_base);
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}
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/* Blizzard 1230/60 SCSI-IV DMA */
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static void zorro_esp_send_blz1230_dma_cmd(struct esp *esp, u32 addr,
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u32 esp_count, u32 dma_count, int write, u8 cmd)
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{
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struct blz1230_dma_registers __iomem *dregs = esp->dma_regs;
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u8 phase = esp->sreg & ESP_STAT_PMASK;
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/*
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* Use PIO if transferring message bytes to esp->command_block_dma.
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* PIO requires a virtual address, so substitute esp->command_block
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* for addr.
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*/
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if (phase == ESP_MIP && addr == esp->command_block_dma) {
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esp_send_pio_cmd(esp, (u32)esp->command_block, esp_count,
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dma_count, write, cmd);
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return;
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}
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/* Clear the results of a possible prior esp->ops->send_dma_cmd() */
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esp->send_cmd_error = 0;
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esp->send_cmd_residual = 0;
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if (write)
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/* DMA receive */
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dma_sync_single_for_device(esp->dev, addr, esp_count,
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DMA_FROM_DEVICE);
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else
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/* DMA send */
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dma_sync_single_for_device(esp->dev, addr, esp_count,
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DMA_TO_DEVICE);
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addr >>= 1;
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if (write)
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addr &= ~(DMA_WRITE);
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else
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addr |= DMA_WRITE;
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writeb((addr >> 24) & 0xff, &dregs->dma_latch);
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writeb((addr >> 24) & 0xff, &dregs->dma_addr);
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writeb((addr >> 16) & 0xff, &dregs->dma_addr);
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writeb((addr >> 8) & 0xff, &dregs->dma_addr);
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writeb(addr & 0xff, &dregs->dma_addr);
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scsi_esp_cmd(esp, ESP_CMD_DMA);
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zorro_esp_write8(esp, (esp_count >> 0) & 0xff, ESP_TCLOW);
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zorro_esp_write8(esp, (esp_count >> 8) & 0xff, ESP_TCMED);
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scsi_esp_cmd(esp, cmd);
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}
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/* Blizzard 1230-II DMA */
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static void zorro_esp_send_blz1230II_dma_cmd(struct esp *esp, u32 addr,
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u32 esp_count, u32 dma_count, int write, u8 cmd)
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{
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struct blz1230II_dma_registers __iomem *dregs = esp->dma_regs;
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u8 phase = esp->sreg & ESP_STAT_PMASK;
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/* Use PIO if transferring message bytes to esp->command_block_dma */
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if (phase == ESP_MIP && addr == esp->command_block_dma) {
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esp_send_pio_cmd(esp, (u32)esp->command_block, esp_count,
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dma_count, write, cmd);
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return;
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}
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esp->send_cmd_error = 0;
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esp->send_cmd_residual = 0;
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if (write)
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/* DMA receive */
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dma_sync_single_for_device(esp->dev, addr, esp_count,
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DMA_FROM_DEVICE);
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else
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/* DMA send */
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dma_sync_single_for_device(esp->dev, addr, esp_count,
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DMA_TO_DEVICE);
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addr >>= 1;
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if (write)
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addr &= ~(DMA_WRITE);
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else
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addr |= DMA_WRITE;
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writeb((addr >> 24) & 0xff, &dregs->dma_latch);
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writeb((addr >> 16) & 0xff, &dregs->dma_addr);
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writeb((addr >> 8) & 0xff, &dregs->dma_addr);
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writeb(addr & 0xff, &dregs->dma_addr);
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scsi_esp_cmd(esp, ESP_CMD_DMA);
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zorro_esp_write8(esp, (esp_count >> 0) & 0xff, ESP_TCLOW);
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zorro_esp_write8(esp, (esp_count >> 8) & 0xff, ESP_TCMED);
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scsi_esp_cmd(esp, cmd);
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}
|
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/* Blizzard 2060 DMA */
|
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static void zorro_esp_send_blz2060_dma_cmd(struct esp *esp, u32 addr,
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u32 esp_count, u32 dma_count, int write, u8 cmd)
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{
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struct blz2060_dma_registers __iomem *dregs = esp->dma_regs;
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u8 phase = esp->sreg & ESP_STAT_PMASK;
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/* Use PIO if transferring message bytes to esp->command_block_dma */
|
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if (phase == ESP_MIP && addr == esp->command_block_dma) {
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esp_send_pio_cmd(esp, (u32)esp->command_block, esp_count,
|
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dma_count, write, cmd);
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return;
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}
|
||
|
|
||
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esp->send_cmd_error = 0;
|
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esp->send_cmd_residual = 0;
|
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|
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if (write)
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/* DMA receive */
|
||
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dma_sync_single_for_device(esp->dev, addr, esp_count,
|
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DMA_FROM_DEVICE);
|
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|
else
|
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/* DMA send */
|
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dma_sync_single_for_device(esp->dev, addr, esp_count,
|
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DMA_TO_DEVICE);
|
||
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|
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addr >>= 1;
|
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if (write)
|
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addr &= ~(DMA_WRITE);
|
||
|
else
|
||
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addr |= DMA_WRITE;
|
||
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|
||
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writeb(addr & 0xff, &dregs->dma_addr3);
|
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writeb((addr >> 8) & 0xff, &dregs->dma_addr2);
|
||
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writeb((addr >> 16) & 0xff, &dregs->dma_addr1);
|
||
|
writeb((addr >> 24) & 0xff, &dregs->dma_addr0);
|
||
|
|
||
|
scsi_esp_cmd(esp, ESP_CMD_DMA);
|
||
|
zorro_esp_write8(esp, (esp_count >> 0) & 0xff, ESP_TCLOW);
|
||
|
zorro_esp_write8(esp, (esp_count >> 8) & 0xff, ESP_TCMED);
|
||
|
|
||
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scsi_esp_cmd(esp, cmd);
|
||
|
}
|
||
|
|
||
|
/* Cyberstorm I DMA */
|
||
|
|
||
|
static void zorro_esp_send_cyber_dma_cmd(struct esp *esp, u32 addr,
|
||
|
u32 esp_count, u32 dma_count, int write, u8 cmd)
|
||
|
{
|
||
|
struct zorro_esp_priv *zep = dev_get_drvdata(esp->dev);
|
||
|
struct cyber_dma_registers __iomem *dregs = esp->dma_regs;
|
||
|
u8 phase = esp->sreg & ESP_STAT_PMASK;
|
||
|
unsigned char *ctrl_data = &zep->ctrl_data;
|
||
|
|
||
|
/* Use PIO if transferring message bytes to esp->command_block_dma */
|
||
|
if (phase == ESP_MIP && addr == esp->command_block_dma) {
|
||
|
esp_send_pio_cmd(esp, (u32)esp->command_block, esp_count,
|
||
|
dma_count, write, cmd);
|
||
|
return;
|
||
|
}
|
||
|
|
||
|
esp->send_cmd_error = 0;
|
||
|
esp->send_cmd_residual = 0;
|
||
|
|
||
|
zorro_esp_write8(esp, (esp_count >> 0) & 0xff, ESP_TCLOW);
|
||
|
zorro_esp_write8(esp, (esp_count >> 8) & 0xff, ESP_TCMED);
|
||
|
|
||
|
if (write) {
|
||
|
/* DMA receive */
|
||
|
dma_sync_single_for_device(esp->dev, addr, esp_count,
|
||
|
DMA_FROM_DEVICE);
|
||
|
addr &= ~(1);
|
||
|
} else {
|
||
|
/* DMA send */
|
||
|
dma_sync_single_for_device(esp->dev, addr, esp_count,
|
||
|
DMA_TO_DEVICE);
|
||
|
addr |= 1;
|
||
|
}
|
||
|
|
||
|
writeb((addr >> 24) & 0xff, &dregs->dma_addr0);
|
||
|
writeb((addr >> 16) & 0xff, &dregs->dma_addr1);
|
||
|
writeb((addr >> 8) & 0xff, &dregs->dma_addr2);
|
||
|
writeb(addr & 0xff, &dregs->dma_addr3);
|
||
|
|
||
|
if (write)
|
||
|
*ctrl_data &= ~(CYBER_DMA_WRITE);
|
||
|
else
|
||
|
*ctrl_data |= CYBER_DMA_WRITE;
|
||
|
|
||
|
*ctrl_data &= ~(CYBER_DMA_Z3); /* Z2, do 16 bit DMA */
|
||
|
|
||
|
writeb(*ctrl_data, &dregs->ctrl_reg);
|
||
|
|
||
|
scsi_esp_cmd(esp, cmd);
|
||
|
}
|
||
|
|
||
|
/* Cyberstorm II DMA */
|
||
|
|
||
|
static void zorro_esp_send_cyberII_dma_cmd(struct esp *esp, u32 addr,
|
||
|
u32 esp_count, u32 dma_count, int write, u8 cmd)
|
||
|
{
|
||
|
struct cyberII_dma_registers __iomem *dregs = esp->dma_regs;
|
||
|
u8 phase = esp->sreg & ESP_STAT_PMASK;
|
||
|
|
||
|
/* Use PIO if transferring message bytes to esp->command_block_dma */
|
||
|
if (phase == ESP_MIP && addr == esp->command_block_dma) {
|
||
|
esp_send_pio_cmd(esp, (u32)esp->command_block, esp_count,
|
||
|
dma_count, write, cmd);
|
||
|
return;
|
||
|
}
|
||
|
|
||
|
esp->send_cmd_error = 0;
|
||
|
esp->send_cmd_residual = 0;
|
||
|
|
||
|
zorro_esp_write8(esp, (esp_count >> 0) & 0xff, ESP_TCLOW);
|
||
|
zorro_esp_write8(esp, (esp_count >> 8) & 0xff, ESP_TCMED);
|
||
|
|
||
|
if (write) {
|
||
|
/* DMA receive */
|
||
|
dma_sync_single_for_device(esp->dev, addr, esp_count,
|
||
|
DMA_FROM_DEVICE);
|
||
|
addr &= ~(1);
|
||
|
} else {
|
||
|
/* DMA send */
|
||
|
dma_sync_single_for_device(esp->dev, addr, esp_count,
|
||
|
DMA_TO_DEVICE);
|
||
|
addr |= 1;
|
||
|
}
|
||
|
|
||
|
writeb((addr >> 24) & 0xff, &dregs->dma_addr0);
|
||
|
writeb((addr >> 16) & 0xff, &dregs->dma_addr1);
|
||
|
writeb((addr >> 8) & 0xff, &dregs->dma_addr2);
|
||
|
writeb(addr & 0xff, &dregs->dma_addr3);
|
||
|
|
||
|
scsi_esp_cmd(esp, cmd);
|
||
|
}
|
||
|
|
||
|
/* Fastlane DMA */
|
||
|
|
||
|
static void zorro_esp_send_fastlane_dma_cmd(struct esp *esp, u32 addr,
|
||
|
u32 esp_count, u32 dma_count, int write, u8 cmd)
|
||
|
{
|
||
|
struct zorro_esp_priv *zep = dev_get_drvdata(esp->dev);
|
||
|
struct fastlane_dma_registers __iomem *dregs = esp->dma_regs;
|
||
|
u8 phase = esp->sreg & ESP_STAT_PMASK;
|
||
|
unsigned char *ctrl_data = &zep->ctrl_data;
|
||
|
|
||
|
/* Use PIO if transferring message bytes to esp->command_block_dma */
|
||
|
if (phase == ESP_MIP && addr == esp->command_block_dma) {
|
||
|
esp_send_pio_cmd(esp, (u32)esp->command_block, esp_count,
|
||
|
dma_count, write, cmd);
|
||
|
return;
|
||
|
}
|
||
|
|
||
|
esp->send_cmd_error = 0;
|
||
|
esp->send_cmd_residual = 0;
|
||
|
|
||
|
zorro_esp_write8(esp, (esp_count >> 0) & 0xff, ESP_TCLOW);
|
||
|
zorro_esp_write8(esp, (esp_count >> 8) & 0xff, ESP_TCMED);
|
||
|
|
||
|
if (write) {
|
||
|
/* DMA receive */
|
||
|
dma_sync_single_for_device(esp->dev, addr, esp_count,
|
||
|
DMA_FROM_DEVICE);
|
||
|
addr &= ~(1);
|
||
|
} else {
|
||
|
/* DMA send */
|
||
|
dma_sync_single_for_device(esp->dev, addr, esp_count,
|
||
|
DMA_TO_DEVICE);
|
||
|
addr |= 1;
|
||
|
}
|
||
|
|
||
|
writeb(0, &dregs->clear_strobe);
|
||
|
z_writel(addr, ((addr & 0x00ffffff) + zep->board_base));
|
||
|
|
||
|
if (write) {
|
||
|
*ctrl_data = (*ctrl_data & FASTLANE_DMA_MASK) |
|
||
|
FASTLANE_DMA_ENABLE;
|
||
|
} else {
|
||
|
*ctrl_data = ((*ctrl_data & FASTLANE_DMA_MASK) |
|
||
|
FASTLANE_DMA_ENABLE |
|
||
|
FASTLANE_DMA_WRITE);
|
||
|
}
|
||
|
|
||
|
writeb(*ctrl_data, &dregs->ctrl_reg);
|
||
|
|
||
|
scsi_esp_cmd(esp, cmd);
|
||
|
}
|
||
|
|
||
|
static int zorro_esp_dma_error(struct esp *esp)
|
||
|
{
|
||
|
return esp->send_cmd_error;
|
||
|
}
|
||
|
|
||
|
/* per-board ESP driver ops */
|
||
|
|
||
|
static const struct esp_driver_ops blz1230_esp_ops = {
|
||
|
.esp_write8 = zorro_esp_write8,
|
||
|
.esp_read8 = zorro_esp_read8,
|
||
|
.irq_pending = zorro_esp_irq_pending,
|
||
|
.dma_length_limit = zorro_esp_dma_length_limit,
|
||
|
.reset_dma = zorro_esp_reset_dma,
|
||
|
.dma_drain = zorro_esp_dma_drain,
|
||
|
.dma_invalidate = zorro_esp_dma_invalidate,
|
||
|
.send_dma_cmd = zorro_esp_send_blz1230_dma_cmd,
|
||
|
.dma_error = zorro_esp_dma_error,
|
||
|
};
|
||
|
|
||
|
static const struct esp_driver_ops blz1230II_esp_ops = {
|
||
|
.esp_write8 = zorro_esp_write8,
|
||
|
.esp_read8 = zorro_esp_read8,
|
||
|
.irq_pending = zorro_esp_irq_pending,
|
||
|
.dma_length_limit = zorro_esp_dma_length_limit,
|
||
|
.reset_dma = zorro_esp_reset_dma,
|
||
|
.dma_drain = zorro_esp_dma_drain,
|
||
|
.dma_invalidate = zorro_esp_dma_invalidate,
|
||
|
.send_dma_cmd = zorro_esp_send_blz1230II_dma_cmd,
|
||
|
.dma_error = zorro_esp_dma_error,
|
||
|
};
|
||
|
|
||
|
static const struct esp_driver_ops blz2060_esp_ops = {
|
||
|
.esp_write8 = zorro_esp_write8,
|
||
|
.esp_read8 = zorro_esp_read8,
|
||
|
.irq_pending = zorro_esp_irq_pending,
|
||
|
.dma_length_limit = zorro_esp_dma_length_limit,
|
||
|
.reset_dma = zorro_esp_reset_dma,
|
||
|
.dma_drain = zorro_esp_dma_drain,
|
||
|
.dma_invalidate = zorro_esp_dma_invalidate,
|
||
|
.send_dma_cmd = zorro_esp_send_blz2060_dma_cmd,
|
||
|
.dma_error = zorro_esp_dma_error,
|
||
|
};
|
||
|
|
||
|
static const struct esp_driver_ops cyber_esp_ops = {
|
||
|
.esp_write8 = zorro_esp_write8,
|
||
|
.esp_read8 = zorro_esp_read8,
|
||
|
.irq_pending = cyber_esp_irq_pending,
|
||
|
.dma_length_limit = zorro_esp_dma_length_limit,
|
||
|
.reset_dma = zorro_esp_reset_dma,
|
||
|
.dma_drain = zorro_esp_dma_drain,
|
||
|
.dma_invalidate = zorro_esp_dma_invalidate,
|
||
|
.send_dma_cmd = zorro_esp_send_cyber_dma_cmd,
|
||
|
.dma_error = zorro_esp_dma_error,
|
||
|
};
|
||
|
|
||
|
static const struct esp_driver_ops cyberII_esp_ops = {
|
||
|
.esp_write8 = zorro_esp_write8,
|
||
|
.esp_read8 = zorro_esp_read8,
|
||
|
.irq_pending = zorro_esp_irq_pending,
|
||
|
.dma_length_limit = zorro_esp_dma_length_limit,
|
||
|
.reset_dma = zorro_esp_reset_dma,
|
||
|
.dma_drain = zorro_esp_dma_drain,
|
||
|
.dma_invalidate = zorro_esp_dma_invalidate,
|
||
|
.send_dma_cmd = zorro_esp_send_cyberII_dma_cmd,
|
||
|
.dma_error = zorro_esp_dma_error,
|
||
|
};
|
||
|
|
||
|
static const struct esp_driver_ops fastlane_esp_ops = {
|
||
|
.esp_write8 = zorro_esp_write8,
|
||
|
.esp_read8 = zorro_esp_read8,
|
||
|
.irq_pending = fastlane_esp_irq_pending,
|
||
|
.dma_length_limit = fastlane_esp_dma_length_limit,
|
||
|
.reset_dma = zorro_esp_reset_dma,
|
||
|
.dma_drain = zorro_esp_dma_drain,
|
||
|
.dma_invalidate = fastlane_esp_dma_invalidate,
|
||
|
.send_dma_cmd = zorro_esp_send_fastlane_dma_cmd,
|
||
|
.dma_error = zorro_esp_dma_error,
|
||
|
};
|
||
|
|
||
|
/* Zorro driver config data */
|
||
|
|
||
|
struct zorro_driver_data {
|
||
|
const char *name;
|
||
|
unsigned long offset;
|
||
|
unsigned long dma_offset;
|
||
|
int absolute; /* offset is absolute address */
|
||
|
int scsi_option;
|
||
|
const struct esp_driver_ops *esp_ops;
|
||
|
};
|
||
|
|
||
|
/* board types */
|
||
|
|
||
|
enum {
|
||
|
ZORRO_BLZ1230,
|
||
|
ZORRO_BLZ1230II,
|
||
|
ZORRO_BLZ2060,
|
||
|
ZORRO_CYBER,
|
||
|
ZORRO_CYBERII,
|
||
|
ZORRO_FASTLANE,
|
||
|
};
|
||
|
|
||
|
/* per-board config data */
|
||
|
|
||
|
static const struct zorro_driver_data zorro_esp_boards[] = {
|
||
|
[ZORRO_BLZ1230] = {
|
||
|
.name = "Blizzard 1230",
|
||
|
.offset = 0x8000,
|
||
|
.dma_offset = 0x10000,
|
||
|
.scsi_option = 1,
|
||
|
.esp_ops = &blz1230_esp_ops,
|
||
|
},
|
||
|
[ZORRO_BLZ1230II] = {
|
||
|
.name = "Blizzard 1230II",
|
||
|
.offset = 0x10000,
|
||
|
.dma_offset = 0x10021,
|
||
|
.scsi_option = 1,
|
||
|
.esp_ops = &blz1230II_esp_ops,
|
||
|
},
|
||
|
[ZORRO_BLZ2060] = {
|
||
|
.name = "Blizzard 2060",
|
||
|
.offset = 0x1ff00,
|
||
|
.dma_offset = 0x1ffe0,
|
||
|
.esp_ops = &blz2060_esp_ops,
|
||
|
},
|
||
|
[ZORRO_CYBER] = {
|
||
|
.name = "CyberStormI",
|
||
|
.offset = 0xf400,
|
||
|
.dma_offset = 0xf800,
|
||
|
.esp_ops = &cyber_esp_ops,
|
||
|
},
|
||
|
[ZORRO_CYBERII] = {
|
||
|
.name = "CyberStormII",
|
||
|
.offset = 0x1ff03,
|
||
|
.dma_offset = 0x1ff43,
|
||
|
.scsi_option = 1,
|
||
|
.esp_ops = &cyberII_esp_ops,
|
||
|
},
|
||
|
[ZORRO_FASTLANE] = {
|
||
|
.name = "Fastlane",
|
||
|
.offset = 0x1000001,
|
||
|
.dma_offset = 0x1000041,
|
||
|
.esp_ops = &fastlane_esp_ops,
|
||
|
},
|
||
|
};
|
||
|
|
||
|
static const struct zorro_device_id zorro_esp_zorro_tbl[] = {
|
||
|
{ /* Blizzard 1230 IV */
|
||
|
.id = ZORRO_ID(PHASE5, 0x11, 0),
|
||
|
.driver_data = ZORRO_BLZ1230,
|
||
|
},
|
||
|
{ /* Blizzard 1230 II (Zorro II) or Fastlane (Zorro III) */
|
||
|
.id = ZORRO_ID(PHASE5, 0x0B, 0),
|
||
|
.driver_data = ZORRO_BLZ1230II,
|
||
|
},
|
||
|
{ /* Blizzard 2060 */
|
||
|
.id = ZORRO_ID(PHASE5, 0x18, 0),
|
||
|
.driver_data = ZORRO_BLZ2060,
|
||
|
},
|
||
|
{ /* Cyberstorm */
|
||
|
.id = ZORRO_ID(PHASE5, 0x0C, 0),
|
||
|
.driver_data = ZORRO_CYBER,
|
||
|
},
|
||
|
{ /* Cyberstorm II */
|
||
|
.id = ZORRO_ID(PHASE5, 0x19, 0),
|
||
|
.driver_data = ZORRO_CYBERII,
|
||
|
},
|
||
|
{ 0 }
|
||
|
};
|
||
|
MODULE_DEVICE_TABLE(zorro, zorro_esp_zorro_tbl);
|
||
|
|
||
|
static int zorro_esp_probe(struct zorro_dev *z,
|
||
|
const struct zorro_device_id *ent)
|
||
|
{
|
||
|
struct scsi_host_template *tpnt = &scsi_esp_template;
|
||
|
struct Scsi_Host *host;
|
||
|
struct esp *esp;
|
||
|
const struct zorro_driver_data *zdd;
|
||
|
struct zorro_esp_priv *zep;
|
||
|
unsigned long board, ioaddr, dmaaddr;
|
||
|
int err;
|
||
|
|
||
|
board = zorro_resource_start(z);
|
||
|
zdd = &zorro_esp_boards[ent->driver_data];
|
||
|
|
||
|
pr_info("%s found at address 0x%lx.\n", zdd->name, board);
|
||
|
|
||
|
zep = kzalloc(sizeof(*zep), GFP_KERNEL);
|
||
|
if (!zep) {
|
||
|
pr_err("Can't allocate device private data!\n");
|
||
|
return -ENOMEM;
|
||
|
}
|
||
|
|
||
|
/* let's figure out whether we have a Zorro II or Zorro III board */
|
||
|
if ((z->rom.er_Type & ERT_TYPEMASK) == ERT_ZORROIII) {
|
||
|
if (board > 0xffffff)
|
||
|
zep->zorro3 = 1;
|
||
|
} else {
|
||
|
/*
|
||
|
* Even though most of these boards identify as Zorro II,
|
||
|
* they are in fact CPU expansion slot boards and have full
|
||
|
* access to all of memory. Fix up DMA bitmask here.
|
||
|
*/
|
||
|
z->dev.coherent_dma_mask = DMA_BIT_MASK(32);
|
||
|
}
|
||
|
|
||
|
/*
|
||
|
* If Zorro III and ID matches Fastlane, our device table entry
|
||
|
* contains data for the Blizzard 1230 II board which does share the
|
||
|
* same ID. Fix up device table entry here.
|
||
|
* TODO: Some Cyberstom060 boards also share this ID but would need
|
||
|
* to use the Cyberstorm I driver data ... we catch this by checking
|
||
|
* for presence of ESP chip later, but don't try to fix up yet.
|
||
|
*/
|
||
|
if (zep->zorro3 && ent->driver_data == ZORRO_BLZ1230II) {
|
||
|
pr_info("%s at address 0x%lx is Fastlane Z3, fixing data!\n",
|
||
|
zdd->name, board);
|
||
|
zdd = &zorro_esp_boards[ZORRO_FASTLANE];
|
||
|
}
|
||
|
|
||
|
if (zdd->absolute) {
|
||
|
ioaddr = zdd->offset;
|
||
|
dmaaddr = zdd->dma_offset;
|
||
|
} else {
|
||
|
ioaddr = board + zdd->offset;
|
||
|
dmaaddr = board + zdd->dma_offset;
|
||
|
}
|
||
|
|
||
|
if (!zorro_request_device(z, zdd->name)) {
|
||
|
pr_err("cannot reserve region 0x%lx, abort\n",
|
||
|
board);
|
||
|
err = -EBUSY;
|
||
|
goto fail_free_zep;
|
||
|
}
|
||
|
|
||
|
host = scsi_host_alloc(tpnt, sizeof(struct esp));
|
||
|
|
||
|
if (!host) {
|
||
|
pr_err("No host detected; board configuration problem?\n");
|
||
|
err = -ENOMEM;
|
||
|
goto fail_release_device;
|
||
|
}
|
||
|
|
||
|
host->base = ioaddr;
|
||
|
host->this_id = 7;
|
||
|
|
||
|
esp = shost_priv(host);
|
||
|
esp->host = host;
|
||
|
esp->dev = &z->dev;
|
||
|
|
||
|
esp->scsi_id = host->this_id;
|
||
|
esp->scsi_id_mask = (1 << esp->scsi_id);
|
||
|
|
||
|
esp->cfreq = 40000000;
|
||
|
|
||
|
zep->esp = esp;
|
||
|
|
||
|
dev_set_drvdata(esp->dev, zep);
|
||
|
|
||
|
/* additional setup required for Fastlane */
|
||
|
if (zep->zorro3 && ent->driver_data == ZORRO_BLZ1230II) {
|
||
|
/* map full address space up to ESP base for DMA */
|
||
|
zep->board_base = ioremap_nocache(board,
|
||
|
FASTLANE_ESP_ADDR-1);
|
||
|
if (!zep->board_base) {
|
||
|
pr_err("Cannot allocate board address space\n");
|
||
|
err = -ENOMEM;
|
||
|
goto fail_free_host;
|
||
|
}
|
||
|
/* initialize DMA control shadow register */
|
||
|
zep->ctrl_data = (FASTLANE_DMA_FCODE |
|
||
|
FASTLANE_DMA_EDI | FASTLANE_DMA_ESI);
|
||
|
}
|
||
|
|
||
|
esp->ops = zdd->esp_ops;
|
||
|
|
||
|
if (ioaddr > 0xffffff)
|
||
|
esp->regs = ioremap_nocache(ioaddr, 0x20);
|
||
|
else
|
||
|
/* ZorroII address space remapped nocache by early startup */
|
||
|
esp->regs = ZTWO_VADDR(ioaddr);
|
||
|
|
||
|
if (!esp->regs) {
|
||
|
err = -ENOMEM;
|
||
|
goto fail_unmap_fastlane;
|
||
|
}
|
||
|
|
||
|
esp->fifo_reg = esp->regs + ESP_FDATA * 4;
|
||
|
|
||
|
/* Check whether a Blizzard 12x0 or CyberstormII really has SCSI */
|
||
|
if (zdd->scsi_option) {
|
||
|
zorro_esp_write8(esp, (ESP_CONFIG1_PENABLE | 7), ESP_CFG1);
|
||
|
if (zorro_esp_read8(esp, ESP_CFG1) != (ESP_CONFIG1_PENABLE|7)) {
|
||
|
err = -ENODEV;
|
||
|
goto fail_unmap_regs;
|
||
|
}
|
||
|
}
|
||
|
|
||
|
if (zep->zorro3) {
|
||
|
/*
|
||
|
* Only Fastlane Z3 for now - add switch for correct struct
|
||
|
* dma_registers size if adding any more
|
||
|
*/
|
||
|
esp->dma_regs = ioremap_nocache(dmaaddr,
|
||
|
sizeof(struct fastlane_dma_registers));
|
||
|
} else
|
||
|
/* ZorroII address space remapped nocache by early startup */
|
||
|
esp->dma_regs = ZTWO_VADDR(dmaaddr);
|
||
|
|
||
|
if (!esp->dma_regs) {
|
||
|
err = -ENOMEM;
|
||
|
goto fail_unmap_regs;
|
||
|
}
|
||
|
|
||
|
esp->command_block = dma_alloc_coherent(esp->dev, 16,
|
||
|
&esp->command_block_dma,
|
||
|
GFP_KERNEL);
|
||
|
|
||
|
if (!esp->command_block) {
|
||
|
err = -ENOMEM;
|
||
|
goto fail_unmap_dma_regs;
|
||
|
}
|
||
|
|
||
|
host->irq = IRQ_AMIGA_PORTS;
|
||
|
err = request_irq(host->irq, scsi_esp_intr, IRQF_SHARED,
|
||
|
"Amiga Zorro ESP", esp);
|
||
|
if (err < 0) {
|
||
|
err = -ENODEV;
|
||
|
goto fail_free_command_block;
|
||
|
}
|
||
|
|
||
|
/* register the chip */
|
||
|
err = scsi_esp_register(esp);
|
||
|
|
||
|
if (err) {
|
||
|
err = -ENOMEM;
|
||
|
goto fail_free_irq;
|
||
|
}
|
||
|
|
||
|
return 0;
|
||
|
|
||
|
fail_free_irq:
|
||
|
free_irq(host->irq, esp);
|
||
|
|
||
|
fail_free_command_block:
|
||
|
dma_free_coherent(esp->dev, 16,
|
||
|
esp->command_block,
|
||
|
esp->command_block_dma);
|
||
|
|
||
|
fail_unmap_dma_regs:
|
||
|
if (zep->zorro3)
|
||
|
iounmap(esp->dma_regs);
|
||
|
|
||
|
fail_unmap_regs:
|
||
|
if (ioaddr > 0xffffff)
|
||
|
iounmap(esp->regs);
|
||
|
|
||
|
fail_unmap_fastlane:
|
||
|
if (zep->zorro3)
|
||
|
iounmap(zep->board_base);
|
||
|
|
||
|
fail_free_host:
|
||
|
scsi_host_put(host);
|
||
|
|
||
|
fail_release_device:
|
||
|
zorro_release_device(z);
|
||
|
|
||
|
fail_free_zep:
|
||
|
kfree(zep);
|
||
|
|
||
|
return err;
|
||
|
}
|
||
|
|
||
|
static void zorro_esp_remove(struct zorro_dev *z)
|
||
|
{
|
||
|
struct zorro_esp_priv *zep = dev_get_drvdata(&z->dev);
|
||
|
struct esp *esp = zep->esp;
|
||
|
struct Scsi_Host *host = esp->host;
|
||
|
|
||
|
scsi_esp_unregister(esp);
|
||
|
|
||
|
free_irq(host->irq, esp);
|
||
|
dma_free_coherent(esp->dev, 16,
|
||
|
esp->command_block,
|
||
|
esp->command_block_dma);
|
||
|
|
||
|
if (zep->zorro3) {
|
||
|
iounmap(zep->board_base);
|
||
|
iounmap(esp->dma_regs);
|
||
|
}
|
||
|
|
||
|
if (host->base > 0xffffff)
|
||
|
iounmap(esp->regs);
|
||
|
|
||
|
scsi_host_put(host);
|
||
|
|
||
|
zorro_release_device(z);
|
||
|
|
||
|
kfree(zep);
|
||
|
}
|
||
|
|
||
|
static struct zorro_driver zorro_esp_driver = {
|
||
|
.name = KBUILD_MODNAME,
|
||
|
.id_table = zorro_esp_zorro_tbl,
|
||
|
.probe = zorro_esp_probe,
|
||
|
.remove = zorro_esp_remove,
|
||
|
};
|
||
|
|
||
|
static int __init zorro_esp_scsi_init(void)
|
||
|
{
|
||
|
return zorro_register_driver(&zorro_esp_driver);
|
||
|
}
|
||
|
|
||
|
static void __exit zorro_esp_scsi_exit(void)
|
||
|
{
|
||
|
zorro_unregister_driver(&zorro_esp_driver);
|
||
|
}
|
||
|
|
||
|
module_init(zorro_esp_scsi_init);
|
||
|
module_exit(zorro_esp_scsi_exit);
|