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519 lines
13 KiB
519 lines
13 KiB
// SPDX-License-Identifier: GPL-2.0-only |
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/* |
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* linux/drivers/acorn/scsi/cumana_2.c |
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* |
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* Copyright (C) 1997-2005 Russell King |
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* |
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* Changelog: |
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* 30-08-1997 RMK 0.0.0 Created, READONLY version. |
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* 22-01-1998 RMK 0.0.1 Updated to 2.1.80. |
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* 15-04-1998 RMK 0.0.1 Only do PIO if FAS216 will allow it. |
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* 02-05-1998 RMK 0.0.2 Updated & added DMA support. |
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* 27-06-1998 RMK Changed asm/delay.h to linux/delay.h |
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* 18-08-1998 RMK 0.0.3 Fixed synchronous transfer depth. |
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* 02-04-2000 RMK 0.0.4 Updated for new error handling code. |
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*/ |
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#include <linux/module.h> |
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#include <linux/blkdev.h> |
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#include <linux/kernel.h> |
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#include <linux/string.h> |
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#include <linux/ioport.h> |
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#include <linux/proc_fs.h> |
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#include <linux/delay.h> |
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#include <linux/interrupt.h> |
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#include <linux/init.h> |
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#include <linux/dma-mapping.h> |
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#include <linux/pgtable.h> |
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#include <asm/dma.h> |
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#include <asm/ecard.h> |
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#include <asm/io.h> |
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#include "../scsi.h" |
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#include <scsi/scsi_host.h> |
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#include "fas216.h" |
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#include "scsi.h" |
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#include <scsi/scsicam.h> |
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#define CUMANASCSI2_STATUS (0x0000) |
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#define STATUS_INT (1 << 0) |
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#define STATUS_DRQ (1 << 1) |
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#define STATUS_LATCHED (1 << 3) |
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#define CUMANASCSI2_ALATCH (0x0014) |
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#define ALATCH_ENA_INT (3) |
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#define ALATCH_DIS_INT (2) |
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#define ALATCH_ENA_TERM (5) |
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#define ALATCH_DIS_TERM (4) |
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#define ALATCH_ENA_BIT32 (11) |
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#define ALATCH_DIS_BIT32 (10) |
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#define ALATCH_ENA_DMA (13) |
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#define ALATCH_DIS_DMA (12) |
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#define ALATCH_DMA_OUT (15) |
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#define ALATCH_DMA_IN (14) |
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#define CUMANASCSI2_PSEUDODMA (0x0200) |
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#define CUMANASCSI2_FAS216_OFFSET (0x0300) |
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#define CUMANASCSI2_FAS216_SHIFT 2 |
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/* |
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* Version |
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*/ |
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#define VERSION "1.00 (13/11/2002 2.5.47)" |
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/* |
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* Use term=0,1,0,0,0 to turn terminators on/off |
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*/ |
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static int term[MAX_ECARDS] = { 1, 1, 1, 1, 1, 1, 1, 1 }; |
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#define NR_SG 256 |
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struct cumanascsi2_info { |
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FAS216_Info info; |
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struct expansion_card *ec; |
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void __iomem *base; |
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unsigned int terms; /* Terminator state */ |
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struct scatterlist sg[NR_SG]; /* Scatter DMA list */ |
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}; |
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#define CSTATUS_IRQ (1 << 0) |
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#define CSTATUS_DRQ (1 << 1) |
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/* Prototype: void cumanascsi_2_irqenable(ec, irqnr) |
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* Purpose : Enable interrupts on Cumana SCSI 2 card |
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* Params : ec - expansion card structure |
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* : irqnr - interrupt number |
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*/ |
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static void |
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cumanascsi_2_irqenable(struct expansion_card *ec, int irqnr) |
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{ |
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struct cumanascsi2_info *info = ec->irq_data; |
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writeb(ALATCH_ENA_INT, info->base + CUMANASCSI2_ALATCH); |
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} |
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/* Prototype: void cumanascsi_2_irqdisable(ec, irqnr) |
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* Purpose : Disable interrupts on Cumana SCSI 2 card |
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* Params : ec - expansion card structure |
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* : irqnr - interrupt number |
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*/ |
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static void |
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cumanascsi_2_irqdisable(struct expansion_card *ec, int irqnr) |
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{ |
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struct cumanascsi2_info *info = ec->irq_data; |
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writeb(ALATCH_DIS_INT, info->base + CUMANASCSI2_ALATCH); |
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} |
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static const expansioncard_ops_t cumanascsi_2_ops = { |
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.irqenable = cumanascsi_2_irqenable, |
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.irqdisable = cumanascsi_2_irqdisable, |
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}; |
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/* Prototype: void cumanascsi_2_terminator_ctl(host, on_off) |
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* Purpose : Turn the Cumana SCSI 2 terminators on or off |
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* Params : host - card to turn on/off |
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* : on_off - !0 to turn on, 0 to turn off |
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*/ |
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static void |
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cumanascsi_2_terminator_ctl(struct Scsi_Host *host, int on_off) |
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{ |
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struct cumanascsi2_info *info = (struct cumanascsi2_info *)host->hostdata; |
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if (on_off) { |
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info->terms = 1; |
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writeb(ALATCH_ENA_TERM, info->base + CUMANASCSI2_ALATCH); |
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} else { |
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info->terms = 0; |
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writeb(ALATCH_DIS_TERM, info->base + CUMANASCSI2_ALATCH); |
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} |
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} |
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/* Prototype: void cumanascsi_2_intr(irq, *dev_id, *regs) |
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* Purpose : handle interrupts from Cumana SCSI 2 card |
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* Params : irq - interrupt number |
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* dev_id - user-defined (Scsi_Host structure) |
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*/ |
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static irqreturn_t |
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cumanascsi_2_intr(int irq, void *dev_id) |
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{ |
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struct cumanascsi2_info *info = dev_id; |
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return fas216_intr(&info->info); |
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} |
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/* Prototype: fasdmatype_t cumanascsi_2_dma_setup(host, SCpnt, direction, min_type) |
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* Purpose : initialises DMA/PIO |
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* Params : host - host |
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* SCpnt - command |
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* direction - DMA on to/off of card |
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* min_type - minimum DMA support that we must have for this transfer |
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* Returns : type of transfer to be performed |
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*/ |
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static fasdmatype_t |
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cumanascsi_2_dma_setup(struct Scsi_Host *host, struct scsi_pointer *SCp, |
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fasdmadir_t direction, fasdmatype_t min_type) |
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{ |
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struct cumanascsi2_info *info = (struct cumanascsi2_info *)host->hostdata; |
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struct device *dev = scsi_get_device(host); |
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int dmach = info->info.scsi.dma; |
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writeb(ALATCH_DIS_DMA, info->base + CUMANASCSI2_ALATCH); |
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if (dmach != NO_DMA && |
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(min_type == fasdma_real_all || SCp->this_residual >= 512)) { |
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int bufs, map_dir, dma_dir, alatch_dir; |
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bufs = copy_SCp_to_sg(&info->sg[0], SCp, NR_SG); |
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if (direction == DMA_OUT) { |
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map_dir = DMA_TO_DEVICE; |
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dma_dir = DMA_MODE_WRITE; |
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alatch_dir = ALATCH_DMA_OUT; |
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} else { |
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map_dir = DMA_FROM_DEVICE; |
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dma_dir = DMA_MODE_READ; |
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alatch_dir = ALATCH_DMA_IN; |
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} |
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dma_map_sg(dev, info->sg, bufs, map_dir); |
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disable_dma(dmach); |
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set_dma_sg(dmach, info->sg, bufs); |
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writeb(alatch_dir, info->base + CUMANASCSI2_ALATCH); |
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set_dma_mode(dmach, dma_dir); |
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enable_dma(dmach); |
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writeb(ALATCH_ENA_DMA, info->base + CUMANASCSI2_ALATCH); |
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writeb(ALATCH_DIS_BIT32, info->base + CUMANASCSI2_ALATCH); |
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return fasdma_real_all; |
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} |
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/* |
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* If we're not doing DMA, |
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* we'll do pseudo DMA |
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*/ |
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return fasdma_pio; |
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} |
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/* |
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* Prototype: void cumanascsi_2_dma_pseudo(host, SCpnt, direction, transfer) |
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* Purpose : handles pseudo DMA |
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* Params : host - host |
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* SCpnt - command |
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* direction - DMA on to/off of card |
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* transfer - minimum number of bytes we expect to transfer |
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*/ |
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static void |
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cumanascsi_2_dma_pseudo(struct Scsi_Host *host, struct scsi_pointer *SCp, |
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fasdmadir_t direction, int transfer) |
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{ |
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struct cumanascsi2_info *info = (struct cumanascsi2_info *)host->hostdata; |
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unsigned int length; |
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unsigned char *addr; |
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length = SCp->this_residual; |
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addr = SCp->ptr; |
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if (direction == DMA_OUT) |
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#if 0 |
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while (length > 1) { |
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unsigned long word; |
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unsigned int status = readb(info->base + CUMANASCSI2_STATUS); |
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if (status & STATUS_INT) |
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goto end; |
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if (!(status & STATUS_DRQ)) |
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continue; |
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word = *addr | *(addr + 1) << 8; |
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writew(word, info->base + CUMANASCSI2_PSEUDODMA); |
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addr += 2; |
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length -= 2; |
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} |
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#else |
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printk ("PSEUDO_OUT???\n"); |
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#endif |
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else { |
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if (transfer && (transfer & 255)) { |
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while (length >= 256) { |
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unsigned int status = readb(info->base + CUMANASCSI2_STATUS); |
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if (status & STATUS_INT) |
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return; |
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if (!(status & STATUS_DRQ)) |
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continue; |
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readsw(info->base + CUMANASCSI2_PSEUDODMA, |
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addr, 256 >> 1); |
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addr += 256; |
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length -= 256; |
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} |
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} |
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while (length > 0) { |
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unsigned long word; |
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unsigned int status = readb(info->base + CUMANASCSI2_STATUS); |
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if (status & STATUS_INT) |
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return; |
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if (!(status & STATUS_DRQ)) |
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continue; |
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word = readw(info->base + CUMANASCSI2_PSEUDODMA); |
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*addr++ = word; |
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if (--length > 0) { |
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*addr++ = word >> 8; |
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length --; |
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} |
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} |
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} |
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} |
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/* Prototype: int cumanascsi_2_dma_stop(host, SCpnt) |
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* Purpose : stops DMA/PIO |
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* Params : host - host |
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* SCpnt - command |
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*/ |
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static void |
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cumanascsi_2_dma_stop(struct Scsi_Host *host, struct scsi_pointer *SCp) |
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{ |
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struct cumanascsi2_info *info = (struct cumanascsi2_info *)host->hostdata; |
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if (info->info.scsi.dma != NO_DMA) { |
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writeb(ALATCH_DIS_DMA, info->base + CUMANASCSI2_ALATCH); |
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disable_dma(info->info.scsi.dma); |
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} |
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} |
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/* Prototype: const char *cumanascsi_2_info(struct Scsi_Host * host) |
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* Purpose : returns a descriptive string about this interface, |
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* Params : host - driver host structure to return info for. |
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* Returns : pointer to a static buffer containing null terminated string. |
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*/ |
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const char *cumanascsi_2_info(struct Scsi_Host *host) |
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{ |
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struct cumanascsi2_info *info = (struct cumanascsi2_info *)host->hostdata; |
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static char string[150]; |
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sprintf(string, "%s (%s) in slot %d v%s terminators o%s", |
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host->hostt->name, info->info.scsi.type, info->ec->slot_no, |
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VERSION, info->terms ? "n" : "ff"); |
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return string; |
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} |
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/* Prototype: int cumanascsi_2_set_proc_info(struct Scsi_Host *host, char *buffer, int length) |
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* Purpose : Set a driver specific function |
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* Params : host - host to setup |
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* : buffer - buffer containing string describing operation |
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* : length - length of string |
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* Returns : -EINVAL, or 0 |
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*/ |
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static int |
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cumanascsi_2_set_proc_info(struct Scsi_Host *host, char *buffer, int length) |
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{ |
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int ret = length; |
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if (length >= 11 && strncmp(buffer, "CUMANASCSI2", 11) == 0) { |
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buffer += 11; |
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length -= 11; |
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if (length >= 5 && strncmp(buffer, "term=", 5) == 0) { |
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if (buffer[5] == '1') |
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cumanascsi_2_terminator_ctl(host, 1); |
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else if (buffer[5] == '0') |
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cumanascsi_2_terminator_ctl(host, 0); |
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else |
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ret = -EINVAL; |
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} else { |
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ret = -EINVAL; |
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} |
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} else { |
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ret = -EINVAL; |
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} |
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return ret; |
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} |
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static int cumanascsi_2_show_info(struct seq_file *m, struct Scsi_Host *host) |
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{ |
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struct cumanascsi2_info *info; |
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info = (struct cumanascsi2_info *)host->hostdata; |
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seq_printf(m, "Cumana SCSI II driver v%s\n", VERSION); |
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fas216_print_host(&info->info, m); |
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seq_printf(m, "Term : o%s\n", |
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info->terms ? "n" : "ff"); |
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fas216_print_stats(&info->info, m); |
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fas216_print_devices(&info->info, m); |
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return 0; |
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} |
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static struct scsi_host_template cumanascsi2_template = { |
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.module = THIS_MODULE, |
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.show_info = cumanascsi_2_show_info, |
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.write_info = cumanascsi_2_set_proc_info, |
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.name = "Cumana SCSI II", |
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.info = cumanascsi_2_info, |
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.queuecommand = fas216_queue_command, |
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.eh_host_reset_handler = fas216_eh_host_reset, |
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.eh_bus_reset_handler = fas216_eh_bus_reset, |
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.eh_device_reset_handler = fas216_eh_device_reset, |
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.eh_abort_handler = fas216_eh_abort, |
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.can_queue = 1, |
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.this_id = 7, |
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.sg_tablesize = SG_MAX_SEGMENTS, |
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.dma_boundary = IOMD_DMA_BOUNDARY, |
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.proc_name = "cumanascsi2", |
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}; |
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static int cumanascsi2_probe(struct expansion_card *ec, |
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const struct ecard_id *id) |
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{ |
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struct Scsi_Host *host; |
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struct cumanascsi2_info *info; |
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void __iomem *base; |
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int ret; |
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ret = ecard_request_resources(ec); |
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if (ret) |
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goto out; |
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base = ecardm_iomap(ec, ECARD_RES_MEMC, 0, 0); |
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if (!base) { |
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ret = -ENOMEM; |
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goto out_region; |
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} |
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host = scsi_host_alloc(&cumanascsi2_template, |
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sizeof(struct cumanascsi2_info)); |
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if (!host) { |
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ret = -ENOMEM; |
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goto out_region; |
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} |
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ecard_set_drvdata(ec, host); |
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info = (struct cumanascsi2_info *)host->hostdata; |
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info->ec = ec; |
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info->base = base; |
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cumanascsi_2_terminator_ctl(host, term[ec->slot_no]); |
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info->info.scsi.io_base = base + CUMANASCSI2_FAS216_OFFSET; |
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info->info.scsi.io_shift = CUMANASCSI2_FAS216_SHIFT; |
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info->info.scsi.irq = ec->irq; |
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info->info.scsi.dma = ec->dma; |
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info->info.ifcfg.clockrate = 40; /* MHz */ |
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info->info.ifcfg.select_timeout = 255; |
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info->info.ifcfg.asyncperiod = 200; /* ns */ |
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info->info.ifcfg.sync_max_depth = 7; |
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info->info.ifcfg.cntl3 = CNTL3_BS8 | CNTL3_FASTSCSI | CNTL3_FASTCLK; |
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info->info.ifcfg.disconnect_ok = 1; |
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info->info.ifcfg.wide_max_size = 0; |
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info->info.ifcfg.capabilities = FASCAP_PSEUDODMA; |
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info->info.dma.setup = cumanascsi_2_dma_setup; |
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info->info.dma.pseudo = cumanascsi_2_dma_pseudo; |
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info->info.dma.stop = cumanascsi_2_dma_stop; |
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ec->irqaddr = info->base + CUMANASCSI2_STATUS; |
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ec->irqmask = STATUS_INT; |
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ecard_setirq(ec, &cumanascsi_2_ops, info); |
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ret = fas216_init(host); |
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if (ret) |
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goto out_free; |
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ret = request_irq(ec->irq, cumanascsi_2_intr, |
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0, "cumanascsi2", info); |
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if (ret) { |
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printk("scsi%d: IRQ%d not free: %d\n", |
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host->host_no, ec->irq, ret); |
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goto out_release; |
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} |
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if (info->info.scsi.dma != NO_DMA) { |
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if (request_dma(info->info.scsi.dma, "cumanascsi2")) { |
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printk("scsi%d: DMA%d not free, using PIO\n", |
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host->host_no, info->info.scsi.dma); |
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info->info.scsi.dma = NO_DMA; |
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} else { |
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set_dma_speed(info->info.scsi.dma, 180); |
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info->info.ifcfg.capabilities |= FASCAP_DMA; |
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} |
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} |
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ret = fas216_add(host, &ec->dev); |
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if (ret == 0) |
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goto out; |
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if (info->info.scsi.dma != NO_DMA) |
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free_dma(info->info.scsi.dma); |
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free_irq(ec->irq, info); |
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out_release: |
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fas216_release(host); |
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out_free: |
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scsi_host_put(host); |
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out_region: |
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ecard_release_resources(ec); |
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out: |
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return ret; |
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} |
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static void cumanascsi2_remove(struct expansion_card *ec) |
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{ |
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struct Scsi_Host *host = ecard_get_drvdata(ec); |
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struct cumanascsi2_info *info = (struct cumanascsi2_info *)host->hostdata; |
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ecard_set_drvdata(ec, NULL); |
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fas216_remove(host); |
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if (info->info.scsi.dma != NO_DMA) |
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free_dma(info->info.scsi.dma); |
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free_irq(ec->irq, info); |
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fas216_release(host); |
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scsi_host_put(host); |
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ecard_release_resources(ec); |
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} |
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static const struct ecard_id cumanascsi2_cids[] = { |
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{ MANU_CUMANA, PROD_CUMANA_SCSI_2 }, |
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{ 0xffff, 0xffff }, |
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}; |
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static struct ecard_driver cumanascsi2_driver = { |
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.probe = cumanascsi2_probe, |
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.remove = cumanascsi2_remove, |
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.id_table = cumanascsi2_cids, |
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.drv = { |
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.name = "cumanascsi2", |
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}, |
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}; |
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static int __init cumanascsi2_init(void) |
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{ |
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return ecard_register_driver(&cumanascsi2_driver); |
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} |
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static void __exit cumanascsi2_exit(void) |
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{ |
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ecard_remove_driver(&cumanascsi2_driver); |
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} |
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module_init(cumanascsi2_init); |
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module_exit(cumanascsi2_exit); |
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MODULE_AUTHOR("Russell King"); |
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MODULE_DESCRIPTION("Cumana SCSI-2 driver for Acorn machines"); |
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module_param_array(term, int, NULL, 0); |
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MODULE_PARM_DESC(term, "SCSI bus termination"); |
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MODULE_LICENSE("GPL");
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