[linux-2.6-block.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/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)
 */
static irqreturn_t powertecscsi_intr(int irq, void *dev_id)
{
	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, 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;
	}

	/*
	 * 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 up to.
 *	      length  - length of buffer
 *	      inout   - 0 for reading, 1 for writing.
 * Returns  : length of data written to buffer.
 */
static int powertecscsi_show_info(struct seq_file *m, struct Scsi_Host *host)
{
	struct powertec_info *info;

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

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

	fas216_print_stats(&info->info, m);
	fas216_print_devices(&info->info, m);
	return 0;
}

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,
	.show_info			= powertecscsi_show_info,
	.write_info			= powertecscsi_set_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			= SCSI_MAX_SG_CHAIN_SEGMENTS,
	.dma_boundary			= IOMD_DMA_BOUNDARY,
	.cmd_per_lun			= 2,
	.use_clustering			= ENABLE_CLUSTERING,
	.proc_name			= "powertec",
};

static int powertecscsi_probe(struct expansion_card *ec,
			      const struct ecard_id *id)
{
	struct Scsi_Host *host;
	struct powertec_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(&powertecscsi_template,
			       sizeof (struct powertec_info));
	if (!host) {
		ret = -ENOMEM;
		goto out_region;
	}

	ecard_set_drvdata(ec, host);

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

	info->ec = ec;
	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;

	ecard_setirq(ec, &powertecscsi_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, powertecscsi_intr,
			  0, "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_region:
	ecard_release_resources(ec);

 out:
	return ret;
}

static void 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);

	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		= 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>
1da177e4 LT	15	#include <linux/proc_fs.h>
	16	#include <linux/delay.h>
	17	#include <linux/interrupt.h>
	18	#include <linux/init.h>
	19	#include <linux/dma-mapping.h>
	20
	21	#include <asm/dma.h>
	22	#include <asm/ecard.h>
	23	#include <asm/io.h>
1da177e4 LT	24	#include <asm/pgtable.h>
	25
	26	#include "../scsi.h"
	27	#include <scsi/scsi_host.h>
	28	#include "fas216.h"
	29	#include "scsi.h"
	30
	31	#include <scsi/scsicam.h>
	32
	33	#define POWERTEC_FAS216_OFFSET 0x3000
	34	#define POWERTEC_FAS216_SHIFT 6
	35
	36	#define POWERTEC_INTR_STATUS 0x2000
	37	#define POWERTEC_INTR_BIT 0x80
	38
	39	#define POWERTEC_RESET_CONTROL 0x1018
	40	#define POWERTEC_RESET_BIT 1
	41
	42	#define POWERTEC_TERM_CONTROL 0x2018
	43	#define POWERTEC_TERM_ENABLE 1
	44
	45	#define POWERTEC_INTR_CONTROL 0x101c
	46	#define POWERTEC_INTR_ENABLE 1
	47	#define POWERTEC_INTR_DISABLE 0
	48
	49	#define VERSION "1.10 (19/01/2003 2.5.59)"
	50
	51	/*
	52	* Use term=0,1,0,0,0 to turn terminators on/off.
	53	* One entry per slot.
	54	*/
	55	static int term[MAX_ECARDS] = { 1, 1, 1, 1, 1, 1, 1, 1 };
	56
	57	#define NR_SG 256
	58
	59	struct powertec_info {
	60	FAS216_Info info;
	61	struct expansion_card *ec;
	62	void __iomem *base;
	63	unsigned int term_ctl;
	64	struct scatterlist sg[NR_SG];
	65	};
	66
	67	/* Prototype: void powertecscsi_irqenable(ec, irqnr)
	68	* Purpose : Enable interrupts on Powertec SCSI card
	69	* Params : ec - expansion card structure
	70	* : irqnr - interrupt number
	71	*/
	72	static void
	73	powertecscsi_irqenable(struct expansion_card *ec, int irqnr)
	74	{
	75	struct powertec_info *info = ec->irq_data;
	76	writeb(POWERTEC_INTR_ENABLE, info->base + POWERTEC_INTR_CONTROL);
	77	}
	78
	79	/* Prototype: void powertecscsi_irqdisable(ec, irqnr)
	80	* Purpose : Disable interrupts on Powertec SCSI card
	81	* Params : ec - expansion card structure
	82	* : irqnr - interrupt number
	83	*/
	84	static void
	85	powertecscsi_irqdisable(struct expansion_card *ec, int irqnr)
	86	{
	87	struct powertec_info *info = ec->irq_data;
88	writeb(POWERTEC_INTR_DISABLE, info->base + POWERTEC_INTR_CONTROL);
89	}
90
91	static const expansioncard_ops_t powertecscsi_ops = {
92	.irqenable = powertecscsi_irqenable,
93	.irqdisable = powertecscsi_irqdisable,
94	};
95
96	/* Prototype: void powertecscsi_terminator_ctl(host, on_off)
97	* Purpose : Turn the Powertec SCSI terminators on or off
98	* Params : host - card to turn on/off
99	* : on_off - !0 to turn on, 0 to turn off
100	*/
101	static void
102	powertecscsi_terminator_ctl(struct Scsi_Host *host, int on_off)
103	{
104	struct powertec_info info = (struct powertec_info )host->hostdata;
105
106	info->term_ctl = on_off ? POWERTEC_TERM_ENABLE : 0;
107	writeb(info->term_ctl, info->base + POWERTEC_TERM_CONTROL);
108	}
109
110	/* Prototype: void powertecscsi_intr(irq, dev_id, regs)
111	* Purpose : handle interrupts from Powertec SCSI card
112	* Params : irq - interrupt number
113	* dev_id - user-defined (Scsi_Host structure)
1da177e4	114	*/
7d12e780	115	static irqreturn_t powertecscsi_intr(int irq, void *dev_id)
1da177e4 LT	116	{
	117	struct powertec_info *info = dev_id;
	118
	119	return fas216_intr(&info->info);
	120	}
	121
	122	/* Prototype: fasdmatype_t powertecscsi_dma_setup(host, SCpnt, direction, min_type)
	123	* Purpose : initialises DMA/PIO
	124	* Params : host - host
	125	* SCpnt - command
	126	* direction - DMA on to/off of card
	127	* min_type - minimum DMA support that we must have for this transfer
	128	* Returns : type of transfer to be performed
	129	*/
	130	static fasdmatype_t
0a04137e	131	powertecscsi_dma_setup(struct Scsi_Host host, struct scsi_pointer SCp,
1da177e4 LT	132	fasdmadir_t direction, fasdmatype_t min_type)
	133	{
	134	struct powertec_info info = (struct powertec_info )host->hostdata;
	135	struct device *dev = scsi_get_device(host);
	136	int dmach = info->info.scsi.dma;
	137
	138	if (info->info.ifcfg.capabilities & FASCAP_DMA &&
	139	min_type == fasdma_real_all) {
	140	int bufs, map_dir, dma_dir;
	141
	142	bufs = copy_SCp_to_sg(&info->sg[0], SCp, NR_SG);
	143
	144	if (direction == DMA_OUT)
	145	map_dir = DMA_TO_DEVICE,
	146	dma_dir = DMA_MODE_WRITE;
	147	else
	148	map_dir = DMA_FROM_DEVICE,
	149	dma_dir = DMA_MODE_READ;
	150
23d046f4	151	dma_map_sg(dev, info->sg, bufs, map_dir);
1da177e4 LT	152
1da177e4 LT	153	disable_dma(dmach);
23d046f4	154	set_dma_sg(dmach, info->sg, bufs);
1da177e4 LT	155	set_dma_mode(dmach, dma_dir);
	156	enable_dma(dmach);
	157	return fasdma_real_all;
	158	}
	159
	160	/*
	161	* If we're not doing DMA,
	162	* we'll do slow PIO
	163	*/
	164	return fasdma_pio;
	165	}
	166
	167	/* Prototype: int powertecscsi_dma_stop(host, SCpnt)
	168	* Purpose : stops DMA/PIO
	169	* Params : host - host
	170	* SCpnt - command
	171	*/
	172	static void
0a04137e	173	powertecscsi_dma_stop(struct Scsi_Host host, struct scsi_pointer SCp)
1da177e4 LT	174	{
	175	struct powertec_info info = (struct powertec_info )host->hostdata;
	176	if (info->info.scsi.dma != NO_DMA)
	177	disable_dma(info->info.scsi.dma);
	178	}
	179
	180	/* Prototype: const char powertecscsi_info(struct Scsi_Host host)
	181	* Purpose : returns a descriptive string about this interface,
	182	* Params : host - driver host structure to return info for.
	183	* Returns : pointer to a static buffer containing null terminated string.
	184	*/
	185	const char powertecscsi_info(struct Scsi_Host host)
	186	{
	187	struct powertec_info info = (struct powertec_info )host->hostdata;
	188	static char string[150];
	189
	190	sprintf(string, "%s (%s) in slot %d v%s terminators o%s",
	191	host->hostt->name, info->info.scsi.type, info->ec->slot_no,
	192	VERSION, info->term_ctl ? "n" : "ff");
	193
	194	return string;
	195	}
	196
	197	/* Prototype: int powertecscsi_set_proc_info(struct Scsi_Host host, char buffer, int length)
	198	* Purpose : Set a driver specific function
	199	* Params : host - host to setup
	200	* : buffer - buffer containing string describing operation
	201	* : length - length of string
	202	* Returns : -EINVAL, or 0
	203	*/
	204	static int
	205	powertecscsi_set_proc_info(struct Scsi_Host host, char buffer, int length)
	206	{
	207	int ret = length;
	208
	209	if (length >= 12 && strncmp(buffer, "POWERTECSCSI", 12) == 0) {
	210	buffer += 12;
	211	length -= 12;
	212
	213	if (length >= 5 && strncmp(buffer, "term=", 5) == 0) {
	214	if (buffer[5] == '1')
	215	powertecscsi_terminator_ctl(host, 1);
	216	else if (buffer[5] == '0')
	217	powertecscsi_terminator_ctl(host, 0);
	218	else
	219	ret = -EINVAL;
	220	} else
	221	ret = -EINVAL;
	222	} else
	223	ret = -EINVAL;
	224
	225	return ret;
	226	}
	227
	228	/* Prototype: int powertecscsi_proc_info(char buffer, char *start, off_t offset,
	229	* int length, int host_no, int inout)
	230	* Purpose : Return information about the driver to a user process accessing
	231	* the /proc filesystem.
	232	* Params : buffer - a buffer to write information to
	233	* start - a pointer into this buffer set by this routine to the start
	234	* of the required information.
25985edc	235	* offset - offset into information that we have read up to.
1da177e4 LT	236	* length - length of buffer
	237	* inout - 0 for reading, 1 for writing.
	238	* Returns : length of data written to buffer.
	239	*/
9d4e5c54	240	static int powertecscsi_show_info(struct seq_file m, struct Scsi_Host host)
1da177e4 LT	241	{
1da177e4 LT	242	struct powertec_info *info;
1da177e4 LT	243
	244	info = (struct powertec_info *)host->hostdata;
	245
9d4e5c54 AV	246	seq_printf(m, "PowerTec SCSI driver v%s\n", VERSION);
	247	fas216_print_host(&info->info, m);
	248	seq_printf(m, "Term : o%s\n",
1da177e4 LT	249	info->term_ctl ? "n" : "ff");
1da177e4 LT	250
9d4e5c54 AV	251	fas216_print_stats(&info->info, m);
	252	fas216_print_devices(&info->info, m);
	253	return 0;
1da177e4 LT	254	}
1da177e4 LT	255
10523b3b	256	static ssize_t powertecscsi_show_term(struct device dev, struct device_attribute attr, char *buf)
1da177e4 LT	257	{
	258	struct expansion_card *ec = ECARD_DEV(dev);
	259	struct Scsi_Host *host = ecard_get_drvdata(ec);
	260	struct powertec_info info = (struct powertec_info )host->hostdata;
	261
	262	return sprintf(buf, "%d\n", info->term_ctl ? 1 : 0);
	263	}
	264
	265	static ssize_t
10523b3b	266	powertecscsi_store_term(struct device dev, struct device_attribute attr, const char *buf, size_t len)
1da177e4 LT	267	{
	268	struct expansion_card *ec = ECARD_DEV(dev);
	269	struct Scsi_Host *host = ecard_get_drvdata(ec);
	270
	271	if (len > 1)
	272	powertecscsi_terminator_ctl(host, buf[0] != '0');
	273
	274	return len;
	275	}
	276
	277	static DEVICE_ATTR(bus_term, S_IRUGO \| S_IWUSR,
	278	powertecscsi_show_term, powertecscsi_store_term);
	279
d0be4a7d	280	static struct scsi_host_template powertecscsi_template = {
1da177e4	281	.module = THIS_MODULE,
9d4e5c54 AV	282	.show_info = powertecscsi_show_info,
9d4e5c54 AV	283	.write_info = powertecscsi_set_proc_info,
1da177e4 LT	284	.name = "PowerTec SCSI",
	285	.info = powertecscsi_info,
	286	.queuecommand = fas216_queue_command,
	287	.eh_host_reset_handler = fas216_eh_host_reset,
	288	.eh_bus_reset_handler = fas216_eh_bus_reset,
	289	.eh_device_reset_handler = fas216_eh_device_reset,
	290	.eh_abort_handler = fas216_eh_abort,
	291
	292	.can_queue = 8,
	293	.this_id = 7,
5369bea7 RK	294	.sg_tablesize = SCSI_MAX_SG_CHAIN_SEGMENTS,
5369bea7 RK	295	.dma_boundary = IOMD_DMA_BOUNDARY,
1da177e4 LT	296	.cmd_per_lun = 2,
	297	.use_clustering = ENABLE_CLUSTERING,
	298	.proc_name = "powertec",
	299	};
	300
6f039790 GKH	301	static int powertecscsi_probe(struct expansion_card *ec,
6f039790 GKH	302	const struct ecard_id *id)
1da177e4 LT	303	{
	304	struct Scsi_Host *host;
	305	struct powertec_info *info;
1da177e4 LT	306	void __iomem *base;
	307	int ret;
	308
	309	ret = ecard_request_resources(ec);
	310	if (ret)
	311	goto out;
	312
10bdaaa0	313	base = ecardm_iomap(ec, ECARD_RES_IOCFAST, 0, 0);
1da177e4 LT	314	if (!base) {
	315	ret = -ENOMEM;
	316	goto out_region;
	317	}
	318
	319	host = scsi_host_alloc(&powertecscsi_template,
	320	sizeof (struct powertec_info));
	321	if (!host) {
	322	ret = -ENOMEM;
10bdaaa0	323	goto out_region;
1da177e4 LT	324	}
	325
	326	ecard_set_drvdata(ec, host);
	327
	328	info = (struct powertec_info *)host->hostdata;
	329	info->base = base;
	330	powertecscsi_terminator_ctl(host, term[ec->slot_no]);
	331
23d046f4	332	info->ec = ec;
1da177e4 LT	333	info->info.scsi.io_base = base + POWERTEC_FAS216_OFFSET;
	334	info->info.scsi.io_shift = POWERTEC_FAS216_SHIFT;
	335	info->info.scsi.irq = ec->irq;
	336	info->info.scsi.dma = ec->dma;
	337	info->info.ifcfg.clockrate = 40; /* MHz */
	338	info->info.ifcfg.select_timeout = 255;
	339	info->info.ifcfg.asyncperiod = 200; /* ns */
	340	info->info.ifcfg.sync_max_depth = 7;
	341	info->info.ifcfg.cntl3 = CNTL3_BS8 \| CNTL3_FASTSCSI \| CNTL3_FASTCLK;
	342	info->info.ifcfg.disconnect_ok = 1;
	343	info->info.ifcfg.wide_max_size = 0;
	344	info->info.ifcfg.capabilities = 0;
	345	info->info.dma.setup = powertecscsi_dma_setup;
	346	info->info.dma.pseudo = NULL;
	347	info->info.dma.stop = powertecscsi_dma_stop;
	348
	349	ec->irqaddr = base + POWERTEC_INTR_STATUS;
	350	ec->irqmask = POWERTEC_INTR_BIT;
c7b87f3d RK	351
c7b87f3d RK	352	ecard_setirq(ec, &powertecscsi_ops, info);
1da177e4 LT	353
	354	device_create_file(&ec->dev, &dev_attr_bus_term);
	355
	356	ret = fas216_init(host);
	357	if (ret)
	358	goto out_free;
	359
	360	ret = request_irq(ec->irq, powertecscsi_intr,
4909cc2b	361	0, "powertec", info);
1da177e4 LT	362	if (ret) {
	363	printk("scsi%d: IRQ%d not free: %d\n",
	364	host->host_no, ec->irq, ret);
	365	goto out_release;
	366	}
	367
	368	if (info->info.scsi.dma != NO_DMA) {
	369	if (request_dma(info->info.scsi.dma, "powertec")) {
	370	printk("scsi%d: DMA%d not free, using PIO\n",
	371	host->host_no, info->info.scsi.dma);
	372	info->info.scsi.dma = NO_DMA;
	373	} else {
	374	set_dma_speed(info->info.scsi.dma, 180);
	375	info->info.ifcfg.capabilities \|= FASCAP_DMA;
	376	}
	377	}
	378
	379	ret = fas216_add(host, &ec->dev);
	380	if (ret == 0)
	381	goto out;
	382
	383	if (info->info.scsi.dma != NO_DMA)
	384	free_dma(info->info.scsi.dma);
	385	free_irq(ec->irq, host);
	386
	387	out_release:
	388	fas216_release(host);
	389
	390	out_free:
	391	device_remove_file(&ec->dev, &dev_attr_bus_term);
	392	scsi_host_put(host);
	393
1da177e4 LT	394	out_region:
	395	ecard_release_resources(ec);
	396
	397	out:
	398	return ret;
	399	}
	400
6f039790	401	static void powertecscsi_remove(struct expansion_card *ec)
1da177e4 LT	402	{
	403	struct Scsi_Host *host = ecard_get_drvdata(ec);
	404	struct powertec_info info = (struct powertec_info )host->hostdata;
	405
	406	ecard_set_drvdata(ec, NULL);
	407	fas216_remove(host);
	408
	409	device_remove_file(&ec->dev, &dev_attr_bus_term);
	410
	411	if (info->info.scsi.dma != NO_DMA)
	412	free_dma(info->info.scsi.dma);
	413	free_irq(ec->irq, info);
	414
1da177e4 LT	415	fas216_release(host);
	416	scsi_host_put(host);
	417	ecard_release_resources(ec);
	418	}
	419
	420	static const struct ecard_id powertecscsi_cids[] = {
	421	{ MANU_ALSYSTEMS, PROD_ALSYS_SCSIATAPI },
	422	{ 0xffff, 0xffff },
	423	};
	424
	425	static struct ecard_driver powertecscsi_driver = {
	426	.probe = powertecscsi_probe,
6f039790	427	.remove = powertecscsi_remove,
1da177e4 LT	428	.id_table = powertecscsi_cids,
	429	.drv = {
	430	.name = "powertecscsi",
	431	},
	432	};
	433
	434	static int __init powertecscsi_init(void)
	435	{
	436	return ecard_register_driver(&powertecscsi_driver);
	437	}
	438
	439	static void __exit powertecscsi_exit(void)
	440	{
	441	ecard_remove_driver(&powertecscsi_driver);
	442	}
	443
	444	module_init(powertecscsi_init);
	445	module_exit(powertecscsi_exit);
	446
	447	MODULE_AUTHOR("Russell King");
	448	MODULE_DESCRIPTION("Powertec SCSI driver");
8d3b33f6	449	module_param_array(term, int, NULL, 0);
1da177e4 LT	450	MODULE_PARM_DESC(term, "SCSI bus termination");
1da177e4 LT	451	MODULE_LICENSE("GPL");