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Release 4.11 drivers/scsi/arm/eesox.c

Directory: drivers/scsi/arm
/*
 *  linux/drivers/acorn/scsi/eesox.c
 *
 *  Copyright (C) 1997-2005 Russell King
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
 *
 *  This driver is based on experimentation.  Hence, it may have made
 *  assumptions about the particular card that I have available, and
 *  may not be reliable!
 *
 *  Changelog:
 *   01-10-1997 RMK             Created, READONLY version
 *   15-02-1998 RMK             READ/WRITE version
 *                              added DMA support and hardware definitions
 *   14-03-1998 RMK             Updated DMA support
 *                              Added terminator control
 *   15-04-1998 RMK             Only do PIO if FAS216 will allow it.
 *   27-06-1998 RMK             Changed asm/delay.h to linux/delay.h
 *   02-04-2000 RMK     0.0.3   Fixed NO_IRQ/NO_DMA problem, updated for new
 *                              error handling code.
 */
#include <linux/module.h>
#include <linux/blkdev.h>
#include <linux/kernel.h>
#include <linux/string.h>
#include <linux/ioport.h>
#include <linux/proc_fs.h>
#include <linux/delay.h>
#include <linux/interrupt.h>
#include <linux/init.h>
#include <linux/dma-mapping.h>

#include <asm/io.h>
#include <asm/dma.h>
#include <asm/ecard.h>
#include <asm/pgtable.h>

#include "../scsi.h"
#include <scsi/scsi_host.h>
#include "fas216.h"
#include "scsi.h"

#include <scsi/scsicam.h>


#define EESOX_FAS216_OFFSET	0x3000

#define EESOX_FAS216_SHIFT	5


#define EESOX_DMASTAT		0x2800

#define EESOX_STAT_INTR		0x01

#define EESOX_STAT_DMA		0x02


#define EESOX_CONTROL		0x2800

#define EESOX_INTR_ENABLE	0x04

#define EESOX_TERM_ENABLE	0x02

#define EESOX_RESET		0x01


#define EESOX_DMADATA		0x3800


#define VERSION "1.10 (17/01/2003 2.5.59)"

/*
 * Use term=0,1,0,0,0 to turn terminators on/off
 */

static int term[MAX_ECARDS] = { 1, 1, 1, 1, 1, 1, 1, 1 };


#define NR_SG	256


struct eesoxscsi_info {
	
FAS216_Info		info;
	
struct expansion_card	*ec;
	
void __iomem		*base;
	
void __iomem		*ctl_port;
	
unsigned int		control;
	
struct scatterlist	sg[NR_SG];	/* Scatter DMA list     */
};

/* Prototype: void eesoxscsi_irqenable(ec, irqnr)
 * Purpose  : Enable interrupts on EESOX SCSI card
 * Params   : ec    - expansion card structure
 *          : irqnr - interrupt number
 */

static void eesoxscsi_irqenable(struct expansion_card *ec, int irqnr) { struct eesoxscsi_info *info = (struct eesoxscsi_info *)ec->irq_data; info->control |= EESOX_INTR_ENABLE; writeb(info->control, info->ctl_port); }

Contributors

PersonTokensPropCommitsCommitProp
Linus Torvalds (pre-git)3782.22%133.33%
Russell King817.78%266.67%
Total45100.00%3100.00%

/* Prototype: void eesoxscsi_irqdisable(ec, irqnr) * Purpose : Disable interrupts on EESOX SCSI card * Params : ec - expansion card structure * : irqnr - interrupt number */
static void eesoxscsi_irqdisable(struct expansion_card *ec, int irqnr) { struct eesoxscsi_info *info = (struct eesoxscsi_info *)ec->irq_data; info->control &= ~EESOX_INTR_ENABLE; writeb(info->control, info->ctl_port); }

Contributors

PersonTokensPropCommitsCommitProp
Linus Torvalds (pre-git)3882.61%133.33%
Russell King817.39%266.67%
Total46100.00%3100.00%

static const expansioncard_ops_t eesoxscsi_ops = { .irqenable = eesoxscsi_irqenable, .irqdisable = eesoxscsi_irqdisable, }; /* Prototype: void eesoxscsi_terminator_ctl(*host, on_off) * Purpose : Turn the EESOX SCSI terminators on or off * Params : host - card to turn on/off * : on_off - !0 to turn on, 0 to turn off */
static void eesoxscsi_terminator_ctl(struct Scsi_Host *host, int on_off) { struct eesoxscsi_info *info = (struct eesoxscsi_info *)host->hostdata; unsigned long flags; spin_lock_irqsave(host->host_lock, flags); if (on_off) info->control |= EESOX_TERM_ENABLE; else info->control &= ~EESOX_TERM_ENABLE; writeb(info->control, info->ctl_port); spin_unlock_irqrestore(host->host_lock, flags); }

Contributors

PersonTokensPropCommitsCommitProp
Linus Torvalds (pre-git)5974.68%125.00%
Russell King2025.32%375.00%
Total79100.00%4100.00%

/* Prototype: void eesoxscsi_intr(irq, *dev_id, *regs) * Purpose : handle interrupts from EESOX SCSI card * Params : irq - interrupt number * dev_id - user-defined (Scsi_Host structure) */
static irqreturn_t eesoxscsi_intr(int irq, void *dev_id) { struct eesoxscsi_info *info = dev_id; return fas216_intr(&info->info); }

Contributors

PersonTokensPropCommitsCommitProp
Linus Torvalds (pre-git)2068.97%133.33%
Russell King931.03%266.67%
Total29100.00%3100.00%

/* Prototype: fasdmatype_t eesoxscsi_dma_setup(host, SCpnt, direction, min_type) * Purpose : initialises DMA/PIO * Params : host - host * SCpnt - command * direction - DMA on to/off of card * min_type - minimum DMA support that we must have for this transfer * Returns : type of transfer to be performed */
static fasdmatype_t eesoxscsi_dma_setup(struct Scsi_Host *host, struct scsi_pointer *SCp, fasdmadir_t direction, fasdmatype_t min_type) { struct eesoxscsi_info *info = (struct eesoxscsi_info *)host->hostdata; struct device *dev = scsi_get_device(host); int dmach = info->info.scsi.dma; if (dmach != NO_DMA && (min_type == fasdma_real_all || SCp->this_residual >= 512)) { int bufs, map_dir, dma_dir; bufs = copy_SCp_to_sg(&info->sg[0], SCp, NR_SG); if (direction == DMA_OUT) map_dir = DMA_TO_DEVICE, dma_dir = DMA_MODE_WRITE; else map_dir = DMA_FROM_DEVICE, dma_dir = DMA_MODE_READ; dma_map_sg(dev, info->sg, bufs, map_dir); disable_dma(dmach); set_dma_sg(dmach, info->sg, bufs); set_dma_mode(dmach, dma_dir); enable_dma(dmach); return fasdma_real_all; } /* * We don't do DMA, we only do slow PIO * * Some day, we will do Pseudo DMA */ return fasdma_pseudo; }

Contributors

PersonTokensPropCommitsCommitProp
Linus Torvalds (pre-git)12874.42%225.00%
Russell King3620.93%450.00%
Linus Torvalds63.49%112.50%
Christoph Hellwig21.16%112.50%
Total172100.00%8100.00%


static void eesoxscsi_buffer_in(void *buf, int length, void __iomem *base) { const void __iomem *reg_fas = base + EESOX_FAS216_OFFSET; const void __iomem *reg_dmastat = base + EESOX_DMASTAT; const void __iomem *reg_dmadata = base + EESOX_DMADATA; register const unsigned long mask = 0xffff; do { unsigned int status; /* * Interrupt request? */ status = readb(reg_fas + (REG_STAT << EESOX_FAS216_SHIFT)); if (status & STAT_INT) break; /* * DMA request active? */ status = readb(reg_dmastat); if (!(status & EESOX_STAT_DMA)) continue; /* * Get number of bytes in FIFO */ status = readb(reg_fas + (REG_CFIS << EESOX_FAS216_SHIFT)) & CFIS_CF; if (status > 16) status = 16; if (status > length) status = length; /* * Align buffer. */ if (((u32)buf) & 2 && status >= 2) { *(u16 *)buf = readl(reg_dmadata); buf += 2; status -= 2; length -= 2; } if (status >= 8) { unsigned long l1, l2; l1 = readl(reg_dmadata) & mask; l1 |= readl(reg_dmadata) << 16; l2 = readl(reg_dmadata) & mask; l2 |= readl(reg_dmadata) << 16; *(u32 *)buf = l1; buf += 4; *(u32 *)buf = l2; buf += 4; length -= 8; continue; } if (status >= 4) { unsigned long l1; l1 = readl(reg_dmadata) & mask; l1 |= readl(reg_dmadata) << 16; *(u32 *)buf = l1; buf += 4; length -= 4; continue; } if (status >= 2) { *(u16 *)buf = readl(reg_dmadata); buf += 2; length -= 2; } } while (length); }

Contributors

PersonTokensPropCommitsCommitProp
Russell King21462.57%240.00%
Linus Torvalds (pre-git)10731.29%120.00%
Al Viro205.85%120.00%
Tobias Klauser10.29%120.00%
Total342100.00%5100.00%


static void eesoxscsi_buffer_out(void *buf, int length, void __iomem *base) { const void __iomem *reg_fas = base + EESOX_FAS216_OFFSET; const void __iomem *reg_dmastat = base + EESOX_DMASTAT; void __iomem *reg_dmadata = base + EESOX_DMADATA; do { unsigned int status; /* * Interrupt request? */ status = readb(reg_fas + (REG_STAT << EESOX_FAS216_SHIFT)); if (status & STAT_INT) break; /* * DMA request active? */ status = readb(reg_dmastat); if (!(status & EESOX_STAT_DMA)) continue; /* * Get number of bytes in FIFO */ status = readb(reg_fas + (REG_CFIS << EESOX_FAS216_SHIFT)) & CFIS_CF; if (status > 16) status = 16; status = 16 - status; if (status > length) status = length; status &= ~1; /* * Align buffer. */ if (((u32)buf) & 2 && status >= 2) { writel(*(u16 *)buf << 16, reg_dmadata); buf += 2; status -= 2; length -= 2; } if (status >= 8) { unsigned long l1, l2; l1 = *(u32 *)buf; buf += 4; l2 = *(u32 *)buf; buf += 4; writel(l1 << 16, reg_dmadata); writel(l1, reg_dmadata); writel(l2 << 16, reg_dmadata); writel(l2, reg_dmadata); length -= 8; continue; } if (status >= 4) { unsigned long l1; l1 = *(u32 *)buf; buf += 4; writel(l1 << 16, reg_dmadata); writel(l1, reg_dmadata); length -= 4; continue; } if (status >= 2) { writel(*(u16 *)buf << 16, reg_dmadata); buf += 2; length -= 2; } } while (length); }

Contributors

PersonTokensPropCommitsCommitProp
Russell King22064.33%250.00%
Linus Torvalds (pre-git)10229.82%125.00%
Al Viro205.85%125.00%
Total342100.00%4100.00%


static void eesoxscsi_dma_pseudo(struct Scsi_Host *host, struct scsi_pointer *SCp, fasdmadir_t dir, int transfer_size) { struct eesoxscsi_info *info = (struct eesoxscsi_info *)host->hostdata; if (dir == DMA_IN) { eesoxscsi_buffer_in(SCp->ptr, SCp->this_residual, info->base); } else { eesoxscsi_buffer_out(SCp->ptr, SCp->this_residual, info->base); } }

Contributors

PersonTokensPropCommitsCommitProp
Russell King5875.32%250.00%
Linus Torvalds (pre-git)1722.08%125.00%
Christoph Hellwig22.60%125.00%
Total77100.00%4100.00%

/* Prototype: int eesoxscsi_dma_stop(host, SCpnt) * Purpose : stops DMA/PIO * Params : host - host * SCpnt - command */
static void eesoxscsi_dma_stop(struct Scsi_Host *host, struct scsi_pointer *SCp) { struct eesoxscsi_info *info = (struct eesoxscsi_info *)host->hostdata; if (info->info.scsi.dma != NO_DMA) disable_dma(info->info.scsi.dma); }

Contributors

PersonTokensPropCommitsCommitProp
Russell King2649.06%133.33%
Linus Torvalds (pre-git)2547.17%133.33%
Christoph Hellwig23.77%133.33%
Total53100.00%3100.00%

/* Prototype: const char *eesoxscsi_info(struct Scsi_Host * host) * Purpose : returns a descriptive string about this interface, * Params : host - driver host structure to return info for. * Returns : pointer to a static buffer containing null terminated string. */
const char *eesoxscsi_info(struct Scsi_Host *host) { struct eesoxscsi_info *info = (struct eesoxscsi_info *)host->hostdata; static char string[150]; sprintf(string, "%s (%s) in slot %d v%s terminators o%s", host->hostt->name, info->info.scsi.type, info->ec->slot_no, VERSION, info->control & EESOX_TERM_ENABLE ? "n" : "ff"); return string; }

Contributors

PersonTokensPropCommitsCommitProp
Russell King6080.00%375.00%
Linus Torvalds (pre-git)1520.00%125.00%
Total75100.00%4100.00%

/* Prototype: int eesoxscsi_set_proc_info(struct Scsi_Host *host, char *buffer, int length) * Purpose : Set a driver specific function * Params : host - host to setup * : buffer - buffer containing string describing operation * : length - length of string * Returns : -EINVAL, or 0 */
static int eesoxscsi_set_proc_info(struct Scsi_Host *host, char *buffer, int length) { int ret = length; if (length >= 9 && strncmp(buffer, "EESOXSCSI", 9) == 0) { buffer += 9; length -= 9; if (length >= 5 && strncmp(buffer, "term=", 5) == 0) { if (buffer[5] == '1') eesoxscsi_terminator_ctl(host, 1); else if (buffer[5] == '0') eesoxscsi_terminator_ctl(host, 0); else ret = -EINVAL; } else ret = -EINVAL; } else ret = -EINVAL; return ret; }

Contributors

PersonTokensPropCommitsCommitProp
Russell King12097.56%150.00%
Linus Torvalds (pre-git)32.44%150.00%
Total123100.00%2100.00%


static int eesoxscsi_show_info(struct seq_file *m, struct Scsi_Host *host) { struct eesoxscsi_info *info; info = (struct eesoxscsi_info *)host->hostdata; seq_printf(m, "EESOX SCSI driver v%s\n", VERSION); fas216_print_host(&info->info, m); seq_printf(m, "Term : o%s\n", info->control & EESOX_TERM_ENABLE ? "n" : "ff"); fas216_print_stats(&info->info, m); fas216_print_devices(&info->info, m); return 0; }

Contributors

PersonTokensPropCommitsCommitProp
Russell King7279.12%350.00%
Al Viro1516.48%116.67%
Christoph Hellwig22.20%116.67%
Linus Torvalds (pre-git)22.20%116.67%
Total91100.00%6100.00%


static ssize_t eesoxscsi_show_term(struct device *dev, struct device_attribute *attr, char *buf) { struct expansion_card *ec = ECARD_DEV(dev); struct Scsi_Host *host = ecard_get_drvdata(ec); struct eesoxscsi_info *info = (struct eesoxscsi_info *)host->hostdata; return sprintf(buf, "%d\n", info->control & EESOX_TERM_ENABLE ? 1 : 0); }

Contributors

PersonTokensPropCommitsCommitProp
Russell King6793.06%150.00%
Yani Ioannou56.94%150.00%
Total72100.00%2100.00%


static ssize_t eesoxscsi_store_term(struct device *dev, struct device_attribute *attr, const char *buf, size_t len) { struct expansion_card *ec = ECARD_DEV(dev); struct Scsi_Host *host = ecard_get_drvdata(ec); struct eesoxscsi_info *info = (struct eesoxscsi_info *)host->hostdata; unsigned long flags; if (len > 1) { spin_lock_irqsave(host->host_lock, flags); if (buf[0] != '0') { info->control |= EESOX_TERM_ENABLE; } else { info->control &= ~EESOX_TERM_ENABLE; } writeb(info->control, info->ctl_port); spin_unlock_irqrestore(host->host_lock, flags); } return len; }

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PersonTokensPropCommitsCommitProp
Russell King12496.12%150.00%
Yani Ioannou53.88%150.00%
Total129100.00%2100.00%

static DEVICE_ATTR(bus_term, S_IRUGO | S_IWUSR, eesoxscsi_show_term, eesoxscsi_store_term); static struct scsi_host_template eesox_template = { .module = THIS_MODULE, .show_info = eesoxscsi_show_info, .write_info = eesoxscsi_set_proc_info, .name = "EESOX SCSI", .info = eesoxscsi_info, .queuecommand = fas216_queue_command, .eh_host_reset_handler = fas216_eh_host_reset, .eh_bus_reset_handler = fas216_eh_bus_reset, .eh_device_reset_handler = fas216_eh_device_reset, .eh_abort_handler = fas216_eh_abort, .can_queue = 1, .this_id = 7, .sg_tablesize = SG_MAX_SEGMENTS, .dma_boundary = IOMD_DMA_BOUNDARY, .use_clustering = DISABLE_CLUSTERING, .proc_name = "eesox", };
static int eesoxscsi_probe(struct expansion_card *ec, const struct ecard_id *id) { struct Scsi_Host *host; struct eesoxscsi_info *info; void __iomem *base; int ret; ret = ecard_request_resources(ec); if (ret) goto out; base = ecardm_iomap(ec, ECARD_RES_IOCFAST, 0, 0); if (!base) { ret = -ENOMEM; goto out_region; } host = scsi_host_alloc(&eesox_template, sizeof(struct eesoxscsi_info)); if (!host) { ret = -ENOMEM; goto out_region; } ecard_set_drvdata(ec, host); info = (struct eesoxscsi_info *)host->hostdata; info->ec = ec; info->base = base; info->ctl_port = base + EESOX_CONTROL; info->control = term[ec->slot_no] ? EESOX_TERM_ENABLE : 0; writeb(info->control, info->ctl_port); info->info.scsi.io_base = base + EESOX_FAS216_OFFSET; info->info.scsi.io_shift = EESOX_FAS216_SHIFT; info->info.scsi.irq = ec->irq; info->info.scsi.dma = ec->dma; info->info.ifcfg.clockrate = 40; /* MHz */ info->info.ifcfg.select_timeout = 255; info->info.ifcfg.asyncperiod = 200; /* ns */ info->info.ifcfg.sync_max_depth = 7; info->info.ifcfg.cntl3 = CNTL3_FASTSCSI | CNTL3_FASTCLK; info->info.ifcfg.disconnect_ok = 1; info->info.ifcfg.wide_max_size = 0; info->info.ifcfg.capabilities = FASCAP_PSEUDODMA; info->info.dma.setup = eesoxscsi_dma_setup; info->info.dma.pseudo = eesoxscsi_dma_pseudo; info->info.dma.stop = eesoxscsi_dma_stop; ec->irqaddr = base + EESOX_DMASTAT; ec->irqmask = EESOX_STAT_INTR; ecard_setirq(ec, &eesoxscsi_ops, info); device_create_file(&ec->dev, &dev_attr_bus_term); ret = fas216_init(host); if (ret) goto out_free; ret = request_irq(ec->irq, eesoxscsi_intr, 0, "eesoxscsi", info); if (ret) { printk("scsi%d: IRQ%d not free: %d\n", host->host_no, ec->irq, ret); goto out_remove; } if (info->info.scsi.dma != NO_DMA) { if (request_dma(info->info.scsi.dma, "eesox")) { printk("scsi%d: DMA%d not free, DMA disabled\n", host->host_no, info->info.scsi.dma); info->info.scsi.dma = NO_DMA; } else { set_dma_speed(info->info.scsi.dma, 180); info->info.ifcfg.capabilities |= FASCAP_DMA; info->info.ifcfg.cntl3 |= CNTL3_BS8; } } ret = fas216_add(host, &ec->dev); if (ret == 0) goto out; if (info->info.scsi.dma != NO_DMA) free_dma(info->info.scsi.dma); free_irq(ec->irq, host); out_remove: fas216_remove(host); out_free: device_remove_file(&ec->dev, &dev_attr_bus_term); scsi_host_put(host); out_region: ecard_release_resources(ec); out: return ret; }

Contributors

PersonTokensPropCommitsCommitProp
Russell King42770.70%969.23%
Linus Torvalds (pre-git)17028.15%215.38%
Mike Anderson71.16%215.38%
Total604100.00%13100.00%


static void eesoxscsi_remove(struct expansion_card *ec) { struct Scsi_Host *host = ecard_get_drvdata(ec); struct eesoxscsi_info *info = (struct eesoxscsi_info *)host->hostdata; ecard_set_drvdata(ec, NULL); fas216_remove(host); if (info->info.scsi.dma != NO_DMA) free_dma(info->info.scsi.dma); free_irq(ec->irq, info); device_remove_file(&ec->dev, &dev_attr_bus_term); fas216_release(host); scsi_host_put(host); ecard_release_resources(ec); }

Contributors

PersonTokensPropCommitsCommitProp
Russell King8076.19%685.71%
Linus Torvalds (pre-git)2523.81%114.29%
Total105100.00%7100.00%

static const struct ecard_id eesoxscsi_cids[] = { { MANU_EESOX, PROD_EESOX_SCSI2 }, { 0xffff, 0xffff }, }; static struct ecard_driver eesoxscsi_driver = { .probe = eesoxscsi_probe, .remove = eesoxscsi_remove, .id_table = eesoxscsi_cids, .drv = { .name = "eesoxscsi", }, };
static int __init eesox_init(void) { return ecard_register_driver(&eesoxscsi_driver); }

Contributors

PersonTokensPropCommitsCommitProp
Linus Torvalds1487.50%150.00%
Russell King212.50%150.00%
Total16100.00%2100.00%


static void __exit eesox_exit(void) { ecard_remove_driver(&eesoxscsi_driver); }

Contributors

PersonTokensPropCommitsCommitProp
Linus Torvalds1386.67%150.00%
Russell King213.33%150.00%
Total15100.00%2100.00%

module_init(eesox_init); module_exit(eesox_exit); MODULE_AUTHOR("Russell King"); MODULE_DESCRIPTION("EESOX 'Fast' SCSI driver for Acorn machines"); module_param_array(term, int, NULL, 0); MODULE_PARM_DESC(term, "SCSI bus termination"); MODULE_LICENSE("GPL");

Overall Contributors

PersonTokensPropCommitsCommitProp
Russell King173661.91%2045.45%
Linus Torvalds (pre-git)86130.71%49.09%
Linus Torvalds1073.82%613.64%
Al Viro622.21%24.55%
Yani Ioannou100.36%12.27%
Christoph Hellwig100.36%36.82%
Mike Anderson70.25%24.55%
Rusty Russell60.21%12.27%
Tobias Klauser10.04%12.27%
David Howells10.04%12.27%
Adrian Bunk10.04%12.27%
Ming Lin10.04%12.27%
Arjan van de Ven10.04%12.27%
Greg Kroah-Hartman0.00%00.00%
Total2804100.00%44100.00%
Directory: drivers/scsi/arm
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