[mirror_ubuntu-focal-kernel.git] / drivers / scsi / arm / powertec.c

/*
 *  linux/drivers/acorn/scsi/powertec.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.
 */
#include <linux/module.h>
#include <linux/blkdev.h>
#include <linux/kernel.h>
#include <linux/string.h>
#include <linux/ioport.h>
#include <linux/sched.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/dma.h>
#include <asm/ecard.h>
#include <asm/io.h>
#include <asm/pgtable.h>

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

#include <scsi/scsicam.h>

#define POWERTEC_FAS216_OFFSET	0x3000
#define POWERTEC_FAS216_SHIFT	6

#define POWERTEC_INTR_STATUS	0x2000
#define POWERTEC_INTR_BIT	0x80

#define POWERTEC_RESET_CONTROL	0x1018
#define POWERTEC_RESET_BIT	1

#define POWERTEC_TERM_CONTROL	0x2018
#define POWERTEC_TERM_ENABLE	1

#define POWERTEC_INTR_CONTROL	0x101c
#define POWERTEC_INTR_ENABLE	1
#define POWERTEC_INTR_DISABLE	0

#define VERSION	"1.10 (19/01/2003 2.5.59)"

/*
 * Use term=0,1,0,0,0 to turn terminators on/off.
 * One entry per slot.
 */
static int term[MAX_ECARDS] = { 1, 1, 1, 1, 1, 1, 1, 1 };

#define NR_SG	256

struct powertec_info {
	FAS216_Info		info;
	struct expansion_card	*ec;
	void __iomem		*base;
	unsigned int		term_ctl;
	struct scatterlist	sg[NR_SG];
};

/* Prototype: void powertecscsi_irqenable(ec, irqnr)
 * Purpose  : Enable interrupts on Powertec SCSI card
 * Params   : ec    - expansion card structure
 *          : irqnr - interrupt number
 */
static void
powertecscsi_irqenable(struct expansion_card *ec, int irqnr)
{
	struct powertec_info *info = ec->irq_data;
	writeb(POWERTEC_INTR_ENABLE, info->base + POWERTEC_INTR_CONTROL);
}

/* Prototype: void powertecscsi_irqdisable(ec, irqnr)
 * Purpose  : Disable interrupts on Powertec SCSI card
 * Params   : ec    - expansion card structure
 *          : irqnr - interrupt number
 */
static void
powertecscsi_irqdisable(struct expansion_card *ec, int irqnr)
{
	struct powertec_info *info = ec->irq_data;
	writeb(POWERTEC_INTR_DISABLE, info->base + POWERTEC_INTR_CONTROL);
}

static const expansioncard_ops_t powertecscsi_ops = {
	.irqenable	= powertecscsi_irqenable,
	.irqdisable	= powertecscsi_irqdisable,
};

/* Prototype: void powertecscsi_terminator_ctl(host, on_off)
 * Purpose  : Turn the Powertec SCSI terminators on or off
 * Params   : host   - card to turn on/off
 *          : on_off - !0 to turn on, 0 to turn off
 */
static void
powertecscsi_terminator_ctl(struct Scsi_Host *host, int on_off)
{
	struct powertec_info *info = (struct powertec_info *)host->hostdata;

	info->term_ctl = on_off ? POWERTEC_TERM_ENABLE : 0;
	writeb(info->term_ctl, info->base + POWERTEC_TERM_CONTROL);
}

/* Prototype: void powertecscsi_intr(irq, *dev_id, *regs)
 * Purpose  : handle interrupts from Powertec SCSI card
 * Params   : irq    - interrupt number
 *	      dev_id - user-defined (Scsi_Host structure)
 *	      regs   - processor registers at interrupt
 */
static irqreturn_t
powertecscsi_intr(int irq, void *dev_id, struct pt_regs *regs)
{
	struct powertec_info *info = dev_id;

	return fas216_intr(&info->info);
}

/* Prototype: fasdmatype_t powertecscsi_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
powertecscsi_dma_setup(struct Scsi_Host *host, struct scsi_pointer *SCp,
		       fasdmadir_t direction, fasdmatype_t min_type)
{
	struct powertec_info *info = (struct powertec_info *)host->hostdata;
	struct device *dev = scsi_get_device(host);
	int dmach = info->info.scsi.dma;

	if (info->info.ifcfg.capabilities & FASCAP_DMA &&
	    min_type == fasdma_real_all) {
		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 + 1, map_dir);

		disable_dma(dmach);
		set_dma_sg(dmach, info->sg, bufs + 1);
		set_dma_mode(dmach, dma_dir);
		enable_dma(dmach);
		return fasdma_real_all;
	}

	/*
	 * If we're not doing DMA,
	 *  we'll do slow PIO
	 */
	return fasdma_pio;
}

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

/* Prototype: const char *powertecscsi_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 *powertecscsi_info(struct Scsi_Host *host)
{
	struct powertec_info *info = (struct powertec_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->term_ctl ? "n" : "ff");

	return string;
}

/* Prototype: int powertecscsi_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
powertecscsi_set_proc_info(struct Scsi_Host *host, char *buffer, int length)
{
	int ret = length;

	if (length >= 12 && strncmp(buffer, "POWERTECSCSI", 12) == 0) {
		buffer += 12;
		length -= 12;

		if (length >= 5 && strncmp(buffer, "term=", 5) == 0) {
			if (buffer[5] == '1')
				powertecscsi_terminator_ctl(host, 1);
			else if (buffer[5] == '0')
				powertecscsi_terminator_ctl(host, 0);
			else
				ret = -EINVAL;
		} else
			ret = -EINVAL;
	} else
		ret = -EINVAL;

	return ret;
}

/* Prototype: int powertecscsi_proc_info(char *buffer, char **start, off_t offset,
 *					int length, int host_no, int inout)
 * Purpose  : Return information about the driver to a user process accessing
 *	      the /proc filesystem.
 * Params   : buffer  - a buffer to write information to
 *	      start   - a pointer into this buffer set by this routine to the start
 *		        of the required information.
 *	      offset  - offset into information that we have read upto.
 *	      length  - length of buffer
 *	      inout   - 0 for reading, 1 for writing.
 * Returns  : length of data written to buffer.
 */
int powertecscsi_proc_info(struct Scsi_Host *host, char *buffer, char **start, off_t offset,
			    int length, int inout)
{
	struct powertec_info *info;
	char *p = buffer;
	int pos;

	if (inout == 1)
		return powertecscsi_set_proc_info(host, buffer, length);

	info = (struct powertec_info *)host->hostdata;

	p += sprintf(p, "PowerTec SCSI driver v%s\n", VERSION);
	p += fas216_print_host(&info->info, p);
	p += sprintf(p, "Term    : o%s\n",
			info->term_ctl ? "n" : "ff");

	p += fas216_print_stats(&info->info, p);
	p += fas216_print_devices(&info->info, p);

	*start = buffer + offset;
	pos = p - buffer - offset;
	if (pos > length)
		pos = length;

	return pos;
}

static ssize_t powertecscsi_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 powertec_info *info = (struct powertec_info *)host->hostdata;

	return sprintf(buf, "%d\n", info->term_ctl ? 1 : 0);
}

static ssize_t
powertecscsi_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);

	if (len > 1)
		powertecscsi_terminator_ctl(host, buf[0] != '0');

	return len;
}

static DEVICE_ATTR(bus_term, S_IRUGO | S_IWUSR,
		   powertecscsi_show_term, powertecscsi_store_term);

static struct scsi_host_template powertecscsi_template = {
	.module				= THIS_MODULE,
	.proc_info			= powertecscsi_proc_info,
	.name				= "PowerTec SCSI",
	.info				= powertecscsi_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			= 8,
	.this_id			= 7,
	.sg_tablesize			= SG_ALL,
	.cmd_per_lun			= 2,
	.use_clustering			= ENABLE_CLUSTERING,
	.proc_name			= "powertec",
};

static int __devinit
powertecscsi_probe(struct expansion_card *ec, const struct ecard_id *id)
{
	struct Scsi_Host *host;
	struct powertec_info *info;
	unsigned long resbase, reslen;
	void __iomem *base;
	int ret;

	ret = ecard_request_resources(ec);
	if (ret)
		goto out;

	resbase = ecard_resource_start(ec, ECARD_RES_IOCFAST);
	reslen = ecard_resource_len(ec, ECARD_RES_IOCFAST);
	base = ioremap(resbase, reslen);
	if (!base) {
		ret = -ENOMEM;
		goto out_region;
	}

	host = scsi_host_alloc(&powertecscsi_template,
			       sizeof (struct powertec_info));
	if (!host) {
		ret = -ENOMEM;
		goto out_unmap;
	}

	ecard_set_drvdata(ec, host);

	info = (struct powertec_info *)host->hostdata;
	info->base = base;
	powertecscsi_terminator_ctl(host, term[ec->slot_no]);

	info->info.scsi.io_base		= base + POWERTEC_FAS216_OFFSET;
	info->info.scsi.io_shift	= POWERTEC_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_BS8 | CNTL3_FASTSCSI | CNTL3_FASTCLK;
	info->info.ifcfg.disconnect_ok	= 1;
	info->info.ifcfg.wide_max_size	= 0;
	info->info.ifcfg.capabilities	= 0;
	info->info.dma.setup		= powertecscsi_dma_setup;
	info->info.dma.pseudo		= NULL;
	info->info.dma.stop		= powertecscsi_dma_stop;

	ec->irqaddr	= base + POWERTEC_INTR_STATUS;
	ec->irqmask	= POWERTEC_INTR_BIT;
	ec->irq_data	= info;
	ec->ops		= &powertecscsi_ops;

	device_create_file(&ec->dev, &dev_attr_bus_term);

	ret = fas216_init(host);
	if (ret)
		goto out_free;

	ret = request_irq(ec->irq, powertecscsi_intr,
			  SA_INTERRUPT, "powertec", info);
	if (ret) {
		printk("scsi%d: IRQ%d not free: %d\n",
		       host->host_no, ec->irq, ret);
		goto out_release;
	}

	if (info->info.scsi.dma != NO_DMA) {
		if (request_dma(info->info.scsi.dma, "powertec")) {
			printk("scsi%d: DMA%d not free, using PIO\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;
		}
	}

	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_release:
	fas216_release(host);

 out_free:
	device_remove_file(&ec->dev, &dev_attr_bus_term);
	scsi_host_put(host);

 out_unmap:
	iounmap(base);

 out_region:
	ecard_release_resources(ec);

 out:
	return ret;
}

static void __devexit powertecscsi_remove(struct expansion_card *ec)
{
	struct Scsi_Host *host = ecard_get_drvdata(ec);
	struct powertec_info *info = (struct powertec_info *)host->hostdata;

	ecard_set_drvdata(ec, NULL);
	fas216_remove(host);

	device_remove_file(&ec->dev, &dev_attr_bus_term);

	if (info->info.scsi.dma != NO_DMA)
		free_dma(info->info.scsi.dma);
	free_irq(ec->irq, info);

	iounmap(info->base);

	fas216_release(host);
	scsi_host_put(host);
	ecard_release_resources(ec);
}

static const struct ecard_id powertecscsi_cids[] = {
	{ MANU_ALSYSTEMS, PROD_ALSYS_SCSIATAPI },
	{ 0xffff, 0xffff },
};

static struct ecard_driver powertecscsi_driver = {
	.probe		= powertecscsi_probe,
	.remove		= __devexit_p(powertecscsi_remove),
	.id_table	= powertecscsi_cids,
	.drv = {
		.name		= "powertecscsi",
	},
};

static int __init powertecscsi_init(void)
{
	return ecard_register_driver(&powertecscsi_driver);
}

static void __exit powertecscsi_exit(void)
{
	ecard_remove_driver(&powertecscsi_driver);
}

module_init(powertecscsi_init);
module_exit(powertecscsi_exit);

MODULE_AUTHOR("Russell King");
MODULE_DESCRIPTION("Powertec SCSI driver");
module_param_array(term, int, NULL, 0);
MODULE_PARM_DESC(term, "SCSI bus termination");
MODULE_LICENSE("GPL");
Commit	Line	Data
1da177e4 LT	1	/*
	2	* linux/drivers/acorn/scsi/powertec.c
	3	*
	4	* Copyright (C) 1997-2005 Russell King
	5	*
	6	* This program is free software; you can redistribute it and/or modify
	7	* it under the terms of the GNU General Public License version 2 as
	8	* published by the Free Software Foundation.
	9	*/
	10	#include <linux/module.h>
	11	#include <linux/blkdev.h>
	12	#include <linux/kernel.h>
	13	#include <linux/string.h>
	14	#include <linux/ioport.h>
	15	#include <linux/sched.h>
	16	#include <linux/proc_fs.h>
	17	#include <linux/delay.h>
	18	#include <linux/interrupt.h>
	19	#include <linux/init.h>
	20	#include <linux/dma-mapping.h>
	21
	22	#include <asm/dma.h>
	23	#include <asm/ecard.h>
	24	#include <asm/io.h>
1da177e4 LT	25	#include <asm/pgtable.h>
	26
	27	#include "../scsi.h"
	28	#include <scsi/scsi_host.h>
	29	#include "fas216.h"
	30	#include "scsi.h"
	31
	32	#include <scsi/scsicam.h>
	33
	34	#define POWERTEC_FAS216_OFFSET 0x3000
	35	#define POWERTEC_FAS216_SHIFT 6
	36
	37	#define POWERTEC_INTR_STATUS 0x2000
	38	#define POWERTEC_INTR_BIT 0x80
	39
	40	#define POWERTEC_RESET_CONTROL 0x1018
	41	#define POWERTEC_RESET_BIT 1
	42
	43	#define POWERTEC_TERM_CONTROL 0x2018
	44	#define POWERTEC_TERM_ENABLE 1
	45
	46	#define POWERTEC_INTR_CONTROL 0x101c
	47	#define POWERTEC_INTR_ENABLE 1
	48	#define POWERTEC_INTR_DISABLE 0
	49
	50	#define VERSION "1.10 (19/01/2003 2.5.59)"
	51
	52	/*
	53	* Use term=0,1,0,0,0 to turn terminators on/off.
	54	* One entry per slot.
	55	*/
	56	static int term[MAX_ECARDS] = { 1, 1, 1, 1, 1, 1, 1, 1 };
	57
	58	#define NR_SG 256
	59
	60	struct powertec_info {
	61	FAS216_Info info;
	62	struct expansion_card *ec;
	63	void __iomem *base;
	64	unsigned int term_ctl;
	65	struct scatterlist sg[NR_SG];
	66	};
	67
	68	/* Prototype: void powertecscsi_irqenable(ec, irqnr)
	69	* Purpose : Enable interrupts on Powertec SCSI card
	70	* Params : ec - expansion card structure
	71	* : irqnr - interrupt number
	72	*/
	73	static void
	74	powertecscsi_irqenable(struct expansion_card *ec, int irqnr)
	75	{
	76	struct powertec_info *info = ec->irq_data;
	77	writeb(POWERTEC_INTR_ENABLE, info->base + POWERTEC_INTR_CONTROL);
	78	}
	79
	80	/* Prototype: void powertecscsi_irqdisable(ec, irqnr)
	81	* Purpose : Disable interrupts on Powertec SCSI card
	82	* Params : ec - expansion card structure
	83	* : irqnr - interrupt number
	84	*/
	85	static void
	86	powertecscsi_irqdisable(struct expansion_card *ec, int irqnr)
	87	{
	88	struct powertec_info *info = ec->irq_data;
89	writeb(POWERTEC_INTR_DISABLE, info->base + POWERTEC_INTR_CONTROL);
90	}
91
92	static const expansioncard_ops_t powertecscsi_ops = {
93	.irqenable = powertecscsi_irqenable,
94	.irqdisable = powertecscsi_irqdisable,
95	};
96
97	/* Prototype: void powertecscsi_terminator_ctl(host, on_off)
98	* Purpose : Turn the Powertec SCSI terminators on or off
99	* Params : host - card to turn on/off
100	* : on_off - !0 to turn on, 0 to turn off
101	*/
102	static void
103	powertecscsi_terminator_ctl(struct Scsi_Host *host, int on_off)
104	{
105	struct powertec_info info = (struct powertec_info )host->hostdata;
106
107	info->term_ctl = on_off ? POWERTEC_TERM_ENABLE : 0;
108	writeb(info->term_ctl, info->base + POWERTEC_TERM_CONTROL);
109	}
110
111	/* Prototype: void powertecscsi_intr(irq, dev_id, regs)
112	* Purpose : handle interrupts from Powertec SCSI card
113	* Params : irq - interrupt number
114	* dev_id - user-defined (Scsi_Host structure)
115	* regs - processor registers at interrupt
116	*/
117	static irqreturn_t
118	powertecscsi_intr(int irq, void dev_id, struct pt_regs regs)
119	{
120	struct powertec_info *info = dev_id;
121
122	return fas216_intr(&info->info);
123	}
124
125	/* Prototype: fasdmatype_t powertecscsi_dma_setup(host, SCpnt, direction, min_type)
126	* Purpose : initialises DMA/PIO
127	* Params : host - host
128	* SCpnt - command
129	* direction - DMA on to/off of card
130	* min_type - minimum DMA support that we must have for this transfer
131	* Returns : type of transfer to be performed
132	*/
133	static fasdmatype_t
0a04137e	134	powertecscsi_dma_setup(struct Scsi_Host host, struct scsi_pointer SCp,
1da177e4 LT	135	fasdmadir_t direction, fasdmatype_t min_type)
	136	{
	137	struct powertec_info info = (struct powertec_info )host->hostdata;
	138	struct device *dev = scsi_get_device(host);
	139	int dmach = info->info.scsi.dma;
	140
	141	if (info->info.ifcfg.capabilities & FASCAP_DMA &&
	142	min_type == fasdma_real_all) {
	143	int bufs, map_dir, dma_dir;
	144
	145	bufs = copy_SCp_to_sg(&info->sg[0], SCp, NR_SG);
	146
	147	if (direction == DMA_OUT)
	148	map_dir = DMA_TO_DEVICE,
	149	dma_dir = DMA_MODE_WRITE;
	150	else
	151	map_dir = DMA_FROM_DEVICE,
	152	dma_dir = DMA_MODE_READ;
	153
	154	dma_map_sg(dev, info->sg, bufs + 1, map_dir);
	155
	156	disable_dma(dmach);
	157	set_dma_sg(dmach, info->sg, bufs + 1);
	158	set_dma_mode(dmach, dma_dir);
	159	enable_dma(dmach);
	160	return fasdma_real_all;
	161	}
	162
	163	/*
	164	* If we're not doing DMA,
	165	* we'll do slow PIO
	166	*/
	167	return fasdma_pio;
	168	}
	169
	170	/* Prototype: int powertecscsi_dma_stop(host, SCpnt)
	171	* Purpose : stops DMA/PIO
	172	* Params : host - host
	173	* SCpnt - command
	174	*/
	175	static void
0a04137e	176	powertecscsi_dma_stop(struct Scsi_Host host, struct scsi_pointer SCp)
1da177e4 LT	177	{
	178	struct powertec_info info = (struct powertec_info )host->hostdata;
	179	if (info->info.scsi.dma != NO_DMA)
	180	disable_dma(info->info.scsi.dma);
	181	}
	182
	183	/* Prototype: const char powertecscsi_info(struct Scsi_Host host)
	184	* Purpose : returns a descriptive string about this interface,
	185	* Params : host - driver host structure to return info for.
	186	* Returns : pointer to a static buffer containing null terminated string.
	187	*/
	188	const char powertecscsi_info(struct Scsi_Host host)
	189	{
	190	struct powertec_info info = (struct powertec_info )host->hostdata;
	191	static char string[150];
	192
	193	sprintf(string, "%s (%s) in slot %d v%s terminators o%s",
	194	host->hostt->name, info->info.scsi.type, info->ec->slot_no,
	195	VERSION, info->term_ctl ? "n" : "ff");
	196
	197	return string;
	198	}
	199
	200	/* Prototype: int powertecscsi_set_proc_info(struct Scsi_Host host, char buffer, int length)
	201	* Purpose : Set a driver specific function
	202	* Params : host - host to setup
	203	* : buffer - buffer containing string describing operation
	204	* : length - length of string
	205	* Returns : -EINVAL, or 0
	206	*/
	207	static int
	208	powertecscsi_set_proc_info(struct Scsi_Host host, char buffer, int length)
	209	{
	210	int ret = length;
	211
	212	if (length >= 12 && strncmp(buffer, "POWERTECSCSI", 12) == 0) {
	213	buffer += 12;
	214	length -= 12;
	215
	216	if (length >= 5 && strncmp(buffer, "term=", 5) == 0) {
	217	if (buffer[5] == '1')
	218	powertecscsi_terminator_ctl(host, 1);
	219	else if (buffer[5] == '0')
	220	powertecscsi_terminator_ctl(host, 0);
	221	else
	222	ret = -EINVAL;
	223	} else
	224	ret = -EINVAL;
	225	} else
	226	ret = -EINVAL;
	227
	228	return ret;
	229	}
	230
	231	/* Prototype: int powertecscsi_proc_info(char buffer, char *start, off_t offset,
	232	* int length, int host_no, int inout)
	233	* Purpose : Return information about the driver to a user process accessing
	234	* the /proc filesystem.
	235	* Params : buffer - a buffer to write information to
	236	* start - a pointer into this buffer set by this routine to the start
	237	* of the required information.
	238	* offset - offset into information that we have read upto.
	239	* length - length of buffer
	240	* inout - 0 for reading, 1 for writing.
241	* Returns : length of data written to buffer.
242	*/
243	int powertecscsi_proc_info(struct Scsi_Host host, char buffer, char **start, off_t offset,
244	int length, int inout)
245	{
246	struct powertec_info *info;
247	char *p = buffer;
248	int pos;
249
250	if (inout == 1)
251	return powertecscsi_set_proc_info(host, buffer, length);
252
253	info = (struct powertec_info *)host->hostdata;
254
255	p += sprintf(p, "PowerTec SCSI driver v%s\n", VERSION);
256	p += fas216_print_host(&info->info, p);
257	p += sprintf(p, "Term : o%s\n",
258	info->term_ctl ? "n" : "ff");
259
260	p += fas216_print_stats(&info->info, p);
261	p += fas216_print_devices(&info->info, p);
262
263	*start = buffer + offset;
264	pos = p - buffer - offset;
265	if (pos > length)
266	pos = length;
267
268	return pos;
269	}
270
10523b3b	271	static ssize_t powertecscsi_show_term(struct device dev, struct device_attribute attr, char *buf)
1da177e4 LT	272	{
	273	struct expansion_card *ec = ECARD_DEV(dev);
	274	struct Scsi_Host *host = ecard_get_drvdata(ec);
	275	struct powertec_info info = (struct powertec_info )host->hostdata;
	276
	277	return sprintf(buf, "%d\n", info->term_ctl ? 1 : 0);
	278	}
	279
	280	static ssize_t
10523b3b	281	powertecscsi_store_term(struct device dev, struct device_attribute attr, const char *buf, size_t len)
1da177e4 LT	282	{
	283	struct expansion_card *ec = ECARD_DEV(dev);
	284	struct Scsi_Host *host = ecard_get_drvdata(ec);
	285
	286	if (len > 1)
	287	powertecscsi_terminator_ctl(host, buf[0] != '0');
	288
	289	return len;
	290	}
	291
	292	static DEVICE_ATTR(bus_term, S_IRUGO \| S_IWUSR,
	293	powertecscsi_show_term, powertecscsi_store_term);
	294
d0be4a7d	295	static struct scsi_host_template powertecscsi_template = {
1da177e4 LT	296	.module = THIS_MODULE,
	297	.proc_info = powertecscsi_proc_info,
	298	.name = "PowerTec SCSI",
	299	.info = powertecscsi_info,
	300	.queuecommand = fas216_queue_command,
	301	.eh_host_reset_handler = fas216_eh_host_reset,
	302	.eh_bus_reset_handler = fas216_eh_bus_reset,
	303	.eh_device_reset_handler = fas216_eh_device_reset,
	304	.eh_abort_handler = fas216_eh_abort,
	305
	306	.can_queue = 8,
	307	.this_id = 7,
	308	.sg_tablesize = SG_ALL,
	309	.cmd_per_lun = 2,
	310	.use_clustering = ENABLE_CLUSTERING,
	311	.proc_name = "powertec",
	312	};
	313
	314	static int __devinit
	315	powertecscsi_probe(struct expansion_card ec, const struct ecard_id id)
	316	{
	317	struct Scsi_Host *host;
	318	struct powertec_info *info;
	319	unsigned long resbase, reslen;
	320	void __iomem *base;
	321	int ret;
	322
	323	ret = ecard_request_resources(ec);
	324	if (ret)
	325	goto out;
	326
	327	resbase = ecard_resource_start(ec, ECARD_RES_IOCFAST);
	328	reslen = ecard_resource_len(ec, ECARD_RES_IOCFAST);
	329	base = ioremap(resbase, reslen);
	330	if (!base) {
	331	ret = -ENOMEM;
	332	goto out_region;
	333	}
	334
	335	host = scsi_host_alloc(&powertecscsi_template,
	336	sizeof (struct powertec_info));
	337	if (!host) {
	338	ret = -ENOMEM;
	339	goto out_unmap;
	340	}
	341
	342	ecard_set_drvdata(ec, host);
	343
	344	info = (struct powertec_info *)host->hostdata;
	345	info->base = base;
	346	powertecscsi_terminator_ctl(host, term[ec->slot_no]);
	347
	348	info->info.scsi.io_base = base + POWERTEC_FAS216_OFFSET;
	349	info->info.scsi.io_shift = POWERTEC_FAS216_SHIFT;
	350	info->info.scsi.irq = ec->irq;
	351	info->info.scsi.dma = ec->dma;
	352	info->info.ifcfg.clockrate = 40; /* MHz */
	353	info->info.ifcfg.select_timeout = 255;
	354	info->info.ifcfg.asyncperiod = 200; /* ns */
	355	info->info.ifcfg.sync_max_depth = 7;
	356	info->info.ifcfg.cntl3 = CNTL3_BS8 \| CNTL3_FASTSCSI \| CNTL3_FASTCLK;
	357	info->info.ifcfg.disconnect_ok = 1;
	358	info->info.ifcfg.wide_max_size = 0;
	359	info->info.ifcfg.capabilities = 0;
360	info->info.dma.setup = powertecscsi_dma_setup;
361	info->info.dma.pseudo = NULL;
362	info->info.dma.stop = powertecscsi_dma_stop;
363
364	ec->irqaddr = base + POWERTEC_INTR_STATUS;
365	ec->irqmask = POWERTEC_INTR_BIT;
366	ec->irq_data = info;
367	ec->ops = &powertecscsi_ops;
368
369	device_create_file(&ec->dev, &dev_attr_bus_term);
370
371	ret = fas216_init(host);
372	if (ret)
373	goto out_free;
374
375	ret = request_irq(ec->irq, powertecscsi_intr,
376	SA_INTERRUPT, "powertec", info);
377	if (ret) {
378	printk("scsi%d: IRQ%d not free: %d\n",
379	host->host_no, ec->irq, ret);
380	goto out_release;
381	}
382
383	if (info->info.scsi.dma != NO_DMA) {
384	if (request_dma(info->info.scsi.dma, "powertec")) {
385	printk("scsi%d: DMA%d not free, using PIO\n",
386	host->host_no, info->info.scsi.dma);
387	info->info.scsi.dma = NO_DMA;
388	} else {
389	set_dma_speed(info->info.scsi.dma, 180);
390	info->info.ifcfg.capabilities \|= FASCAP_DMA;
391	}
392	}
393
394	ret = fas216_add(host, &ec->dev);
395	if (ret == 0)
396	goto out;
397
398	if (info->info.scsi.dma != NO_DMA)
399	free_dma(info->info.scsi.dma);
400	free_irq(ec->irq, host);
401
402	out_release:
403	fas216_release(host);
404
405	out_free:
406	device_remove_file(&ec->dev, &dev_attr_bus_term);
407	scsi_host_put(host);
408
409	out_unmap:
410	iounmap(base);
411
412	out_region:
413	ecard_release_resources(ec);
414
415	out:
416	return ret;
417	}
418
419	static void __devexit powertecscsi_remove(struct expansion_card *ec)
420	{
421	struct Scsi_Host *host = ecard_get_drvdata(ec);
422	struct powertec_info info = (struct powertec_info )host->hostdata;
423
424	ecard_set_drvdata(ec, NULL);
425	fas216_remove(host);
426
427	device_remove_file(&ec->dev, &dev_attr_bus_term);
428
429	if (info->info.scsi.dma != NO_DMA)
430	free_dma(info->info.scsi.dma);
431	free_irq(ec->irq, info);
432
433	iounmap(info->base);
434
435	fas216_release(host);
436	scsi_host_put(host);
437	ecard_release_resources(ec);
438	}
439
440	static const struct ecard_id powertecscsi_cids[] = {
441	{ MANU_ALSYSTEMS, PROD_ALSYS_SCSIATAPI },
442	{ 0xffff, 0xffff },
443	};
444
445	static struct ecard_driver powertecscsi_driver = {
446	.probe = powertecscsi_probe,
447	.remove = __devexit_p(powertecscsi_remove),
448	.id_table = powertecscsi_cids,
449	.drv = {
450	.name = "powertecscsi",
451	},
452	};
453
454	static int __init powertecscsi_init(void)
455	{
456	return ecard_register_driver(&powertecscsi_driver);
457	}
458
459	static void __exit powertecscsi_exit(void)
460	{
461	ecard_remove_driver(&powertecscsi_driver);
462	}
463
464	module_init(powertecscsi_init);
465	module_exit(powertecscsi_exit);
466
467	MODULE_AUTHOR("Russell King");
468	MODULE_DESCRIPTION("Powertec SCSI driver");
8d3b33f6	469	module_param_array(term, int, NULL, 0);
1da177e4 LT	470	MODULE_PARM_DESC(term, "SCSI bus termination");
1da177e4 LT	471	MODULE_LICENSE("GPL");