[linux-block.git] / drivers / scsi / arm / powertec.c

// SPDX-License-Identifier: GPL-2.0-only
/*
 *  linux/drivers/acorn/scsi/powertec.c
 *
 *  Copyright (C) 1997-2005 Russell King
 */
#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 <linux/pgtable.h>

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

#include <scsi/scsi.h>
#include <scsi/scsi_cmnd.h>
#include <scsi/scsi_device.h>
#include <scsi/scsi_eh.h>
#include <scsi/scsi_host.h>
#include <scsi/scsi_tcq.h>
#include "fas216.h"
#include "arm_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 const 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,
	.cmd_size			= sizeof(struct fas216_cmd_priv),
	.can_queue			= 8,
	.this_id			= 7,
	.sg_tablesize			= SG_MAX_SEGMENTS,
	.dma_boundary			= IOMD_DMA_BOUNDARY,
	.cmd_per_lun			= 2,
	.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, info);

 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
d2912cb1	1	// SPDX-License-Identifier: GPL-2.0-only
1da177e4 LT	2	/*
	3	* linux/drivers/acorn/scsi/powertec.c
	4	*
	5	* Copyright (C) 1997-2005 Russell King
1da177e4 LT	6	*/
	7	#include <linux/module.h>
	8	#include <linux/blkdev.h>
	9	#include <linux/kernel.h>
	10	#include <linux/string.h>
	11	#include <linux/ioport.h>
1da177e4 LT	12	#include <linux/proc_fs.h>
	13	#include <linux/delay.h>
	14	#include <linux/interrupt.h>
	15	#include <linux/init.h>
	16	#include <linux/dma-mapping.h>
65fddcfc	17	#include <linux/pgtable.h>
1da177e4 LT	18
	19	#include <asm/dma.h>
	20	#include <asm/ecard.h>
	21	#include <asm/io.h>
1da177e4	22
53555fb7 BVA	23	#include <scsi/scsi.h>
	24	#include <scsi/scsi_cmnd.h>
	25	#include <scsi/scsi_device.h>
	26	#include <scsi/scsi_eh.h>
1da177e4	27	#include <scsi/scsi_host.h>
53555fb7	28	#include <scsi/scsi_tcq.h>
1da177e4	29	#include "fas216.h"
8c97e2f3	30	#include "arm_scsi.h"
1da177e4 LT	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)
1da177e4	115	*/
7d12e780	116	static irqreturn_t powertecscsi_intr(int irq, void *dev_id)
1da177e4 LT	117	{
	118	struct powertec_info *info = dev_id;
	119
	120	return fas216_intr(&info->info);
	121	}
	122
	123	/* Prototype: fasdmatype_t powertecscsi_dma_setup(host, SCpnt, direction, min_type)
	124	* Purpose : initialises DMA/PIO
	125	* Params : host - host
	126	* SCpnt - command
	127	* direction - DMA on to/off of card
	128	* min_type - minimum DMA support that we must have for this transfer
	129	* Returns : type of transfer to be performed
	130	*/
	131	static fasdmatype_t
0a04137e	132	powertecscsi_dma_setup(struct Scsi_Host host, struct scsi_pointer SCp,
1da177e4 LT	133	fasdmadir_t direction, fasdmatype_t min_type)
	134	{
	135	struct powertec_info info = (struct powertec_info )host->hostdata;
	136	struct device *dev = scsi_get_device(host);
	137	int dmach = info->info.scsi.dma;
	138
	139	if (info->info.ifcfg.capabilities & FASCAP_DMA &&
	140	min_type == fasdma_real_all) {
	141	int bufs, map_dir, dma_dir;
	142
	143	bufs = copy_SCp_to_sg(&info->sg[0], SCp, NR_SG);
	144
a08a0732 JP	145	if (direction == DMA_OUT) {
a08a0732 JP	146	map_dir = DMA_TO_DEVICE;
1da177e4	147	dma_dir = DMA_MODE_WRITE;
a08a0732 JP	148	} else {
a08a0732 JP	149	map_dir = DMA_FROM_DEVICE;
1da177e4	150	dma_dir = DMA_MODE_READ;
a08a0732	151	}
1da177e4	152
23d046f4	153	dma_map_sg(dev, info->sg, bufs, map_dir);
1da177e4 LT	154
1da177e4 LT	155	disable_dma(dmach);
23d046f4	156	set_dma_sg(dmach, info->sg, bufs);
1da177e4 LT	157	set_dma_mode(dmach, dma_dir);
	158	enable_dma(dmach);
	159	return fasdma_real_all;
	160	}
	161
	162	/*
	163	* If we're not doing DMA,
	164	* we'll do slow PIO
	165	*/
	166	return fasdma_pio;
	167	}
	168
	169	/* Prototype: int powertecscsi_dma_stop(host, SCpnt)
	170	* Purpose : stops DMA/PIO
	171	* Params : host - host
	172	* SCpnt - command
	173	*/
	174	static void
0a04137e	175	powertecscsi_dma_stop(struct Scsi_Host host, struct scsi_pointer SCp)
1da177e4 LT	176	{
	177	struct powertec_info info = (struct powertec_info )host->hostdata;
	178	if (info->info.scsi.dma != NO_DMA)
	179	disable_dma(info->info.scsi.dma);
	180	}
	181
	182	/* Prototype: const char powertecscsi_info(struct Scsi_Host host)
	183	* Purpose : returns a descriptive string about this interface,
	184	* Params : host - driver host structure to return info for.
	185	* Returns : pointer to a static buffer containing null terminated string.
	186	*/
	187	const char powertecscsi_info(struct Scsi_Host host)
	188	{
	189	struct powertec_info info = (struct powertec_info )host->hostdata;
	190	static char string[150];
	191
	192	sprintf(string, "%s (%s) in slot %d v%s terminators o%s",
	193	host->hostt->name, info->info.scsi.type, info->ec->slot_no,
	194	VERSION, info->term_ctl ? "n" : "ff");
	195
	196	return string;
	197	}
	198
	199	/* Prototype: int powertecscsi_set_proc_info(struct Scsi_Host host, char buffer, int length)
	200	* Purpose : Set a driver specific function
	201	* Params : host - host to setup
	202	* : buffer - buffer containing string describing operation
	203	* : length - length of string
	204	* Returns : -EINVAL, or 0
	205	*/
	206	static int
	207	powertecscsi_set_proc_info(struct Scsi_Host host, char buffer, int length)
	208	{
	209	int ret = length;
	210
	211	if (length >= 12 && strncmp(buffer, "POWERTECSCSI", 12) == 0) {
	212	buffer += 12;
	213	length -= 12;
	214
	215	if (length >= 5 && strncmp(buffer, "term=", 5) == 0) {
	216	if (buffer[5] == '1')
	217	powertecscsi_terminator_ctl(host, 1);
	218	else if (buffer[5] == '0')
	219	powertecscsi_terminator_ctl(host, 0);
	220	else
	221	ret = -EINVAL;
	222	} else
	223	ret = -EINVAL;
	224	} else
	225	ret = -EINVAL;
	226
	227	return ret;
	228	}
	229
	230	/* Prototype: int powertecscsi_proc_info(char buffer, char *start, off_t offset,
	231	* int length, int host_no, int inout)
	232	* Purpose : Return information about the driver to a user process accessing
	233	* the /proc filesystem.
	234	* Params : buffer - a buffer to write information to
	235	* start - a pointer into this buffer set by this routine to the start
	236	* of the required information.
25985edc	237	* offset - offset into information that we have read up to.
1da177e4 LT	238	* length - length of buffer
	239	* inout - 0 for reading, 1 for writing.
	240	* Returns : length of data written to buffer.
	241	*/
9d4e5c54	242	static int powertecscsi_show_info(struct seq_file m, struct Scsi_Host host)
1da177e4 LT	243	{
1da177e4 LT	244	struct powertec_info *info;
1da177e4 LT	245
	246	info = (struct powertec_info *)host->hostdata;
	247
9d4e5c54 AV	248	seq_printf(m, "PowerTec SCSI driver v%s\n", VERSION);
	249	fas216_print_host(&info->info, m);
	250	seq_printf(m, "Term : o%s\n",
1da177e4 LT	251	info->term_ctl ? "n" : "ff");
1da177e4 LT	252
9d4e5c54 AV	253	fas216_print_stats(&info->info, m);
	254	fas216_print_devices(&info->info, m);
	255	return 0;
1da177e4 LT	256	}
1da177e4 LT	257
10523b3b	258	static ssize_t powertecscsi_show_term(struct device dev, struct device_attribute attr, char *buf)
1da177e4 LT	259	{
	260	struct expansion_card *ec = ECARD_DEV(dev);
	261	struct Scsi_Host *host = ecard_get_drvdata(ec);
	262	struct powertec_info info = (struct powertec_info )host->hostdata;
	263
	264	return sprintf(buf, "%d\n", info->term_ctl ? 1 : 0);
	265	}
	266
	267	static ssize_t
10523b3b	268	powertecscsi_store_term(struct device dev, struct device_attribute attr, const char *buf, size_t len)
1da177e4 LT	269	{
	270	struct expansion_card *ec = ECARD_DEV(dev);
	271	struct Scsi_Host *host = ecard_get_drvdata(ec);
	272
	273	if (len > 1)
	274	powertecscsi_terminator_ctl(host, buf[0] != '0');
	275
	276	return len;
	277	}
	278
	279	static DEVICE_ATTR(bus_term, S_IRUGO \| S_IWUSR,
	280	powertecscsi_show_term, powertecscsi_store_term);
	281
9db80117	282	static const struct scsi_host_template powertecscsi_template = {
1da177e4	283	.module = THIS_MODULE,
9d4e5c54 AV	284	.show_info = powertecscsi_show_info,
9d4e5c54 AV	285	.write_info = powertecscsi_set_proc_info,
1da177e4 LT	286	.name = "PowerTec SCSI",
	287	.info = powertecscsi_info,
	288	.queuecommand = fas216_queue_command,
	289	.eh_host_reset_handler = fas216_eh_host_reset,
	290	.eh_bus_reset_handler = fas216_eh_bus_reset,
	291	.eh_device_reset_handler = fas216_eh_device_reset,
	292	.eh_abort_handler = fas216_eh_abort,
caffd3ad	293	.cmd_size = sizeof(struct fas216_cmd_priv),
1da177e4 LT	294	.can_queue = 8,
1da177e4 LT	295	.this_id = 7,
65e8617f	296	.sg_tablesize = SG_MAX_SEGMENTS,
5369bea7	297	.dma_boundary = IOMD_DMA_BOUNDARY,
1da177e4	298	.cmd_per_lun = 2,
1da177e4 LT	299	.proc_name = "powertec",
	300	};
	301
6f039790 GKH	302	static int powertecscsi_probe(struct expansion_card *ec,
6f039790 GKH	303	const struct ecard_id *id)
1da177e4 LT	304	{
	305	struct Scsi_Host *host;
	306	struct powertec_info *info;
1da177e4 LT	307	void __iomem *base;
	308	int ret;
	309
	310	ret = ecard_request_resources(ec);
	311	if (ret)
	312	goto out;
	313
10bdaaa0	314	base = ecardm_iomap(ec, ECARD_RES_IOCFAST, 0, 0);
1da177e4 LT	315	if (!base) {
	316	ret = -ENOMEM;
	317	goto out_region;
	318	}
	319
	320	host = scsi_host_alloc(&powertecscsi_template,
	321	sizeof (struct powertec_info));
	322	if (!host) {
	323	ret = -ENOMEM;
10bdaaa0	324	goto out_region;
1da177e4 LT	325	}
	326
	327	ecard_set_drvdata(ec, host);
	328
	329	info = (struct powertec_info *)host->hostdata;
	330	info->base = base;
	331	powertecscsi_terminator_ctl(host, term[ec->slot_no]);
	332
23d046f4	333	info->ec = ec;
1da177e4 LT	334	info->info.scsi.io_base = base + POWERTEC_FAS216_OFFSET;
	335	info->info.scsi.io_shift = POWERTEC_FAS216_SHIFT;
	336	info->info.scsi.irq = ec->irq;
	337	info->info.scsi.dma = ec->dma;
	338	info->info.ifcfg.clockrate = 40; /* MHz */
	339	info->info.ifcfg.select_timeout = 255;
	340	info->info.ifcfg.asyncperiod = 200; /* ns */
	341	info->info.ifcfg.sync_max_depth = 7;
	342	info->info.ifcfg.cntl3 = CNTL3_BS8 \| CNTL3_FASTSCSI \| CNTL3_FASTCLK;
	343	info->info.ifcfg.disconnect_ok = 1;
	344	info->info.ifcfg.wide_max_size = 0;
	345	info->info.ifcfg.capabilities = 0;
	346	info->info.dma.setup = powertecscsi_dma_setup;
	347	info->info.dma.pseudo = NULL;
	348	info->info.dma.stop = powertecscsi_dma_stop;
	349
	350	ec->irqaddr = base + POWERTEC_INTR_STATUS;
	351	ec->irqmask = POWERTEC_INTR_BIT;
c7b87f3d RK	352
c7b87f3d RK	353	ecard_setirq(ec, &powertecscsi_ops, info);
1da177e4 LT	354
	355	device_create_file(&ec->dev, &dev_attr_bus_term);
	356
	357	ret = fas216_init(host);
	358	if (ret)
	359	goto out_free;
	360
	361	ret = request_irq(ec->irq, powertecscsi_intr,
4909cc2b	362	0, "powertec", info);
1da177e4 LT	363	if (ret) {
	364	printk("scsi%d: IRQ%d not free: %d\n",
	365	host->host_no, ec->irq, ret);
	366	goto out_release;
	367	}
	368
	369	if (info->info.scsi.dma != NO_DMA) {
	370	if (request_dma(info->info.scsi.dma, "powertec")) {
	371	printk("scsi%d: DMA%d not free, using PIO\n",
	372	host->host_no, info->info.scsi.dma);
	373	info->info.scsi.dma = NO_DMA;
	374	} else {
	375	set_dma_speed(info->info.scsi.dma, 180);
	376	info->info.ifcfg.capabilities \|= FASCAP_DMA;
	377	}
	378	}
	379
	380	ret = fas216_add(host, &ec->dev);
	381	if (ret == 0)
	382	goto out;
	383
	384	if (info->info.scsi.dma != NO_DMA)
	385	free_dma(info->info.scsi.dma);
d179f7c7	386	free_irq(ec->irq, info);
1da177e4 LT	387
	388	out_release:
	389	fas216_release(host);
	390
	391	out_free:
	392	device_remove_file(&ec->dev, &dev_attr_bus_term);
	393	scsi_host_put(host);
	394
1da177e4 LT	395	out_region:
	396	ecard_release_resources(ec);
	397
	398	out:
	399	return ret;
	400	}
	401
6f039790	402	static void powertecscsi_remove(struct expansion_card *ec)
1da177e4 LT	403	{
	404	struct Scsi_Host *host = ecard_get_drvdata(ec);
	405	struct powertec_info info = (struct powertec_info )host->hostdata;
	406
	407	ecard_set_drvdata(ec, NULL);
	408	fas216_remove(host);
	409
	410	device_remove_file(&ec->dev, &dev_attr_bus_term);
	411
	412	if (info->info.scsi.dma != NO_DMA)
	413	free_dma(info->info.scsi.dma);
	414	free_irq(ec->irq, info);
	415
1da177e4 LT	416	fas216_release(host);
	417	scsi_host_put(host);
	418	ecard_release_resources(ec);
	419	}
	420
	421	static const struct ecard_id powertecscsi_cids[] = {
	422	{ MANU_ALSYSTEMS, PROD_ALSYS_SCSIATAPI },
	423	{ 0xffff, 0xffff },
	424	};
	425
	426	static struct ecard_driver powertecscsi_driver = {
	427	.probe = powertecscsi_probe,
6f039790	428	.remove = powertecscsi_remove,
1da177e4 LT	429	.id_table = powertecscsi_cids,
	430	.drv = {
	431	.name = "powertecscsi",
	432	},
	433	};
	434
	435	static int __init powertecscsi_init(void)
	436	{
	437	return ecard_register_driver(&powertecscsi_driver);
	438	}
	439
	440	static void __exit powertecscsi_exit(void)
	441	{
	442	ecard_remove_driver(&powertecscsi_driver);
	443	}
	444
	445	module_init(powertecscsi_init);
	446	module_exit(powertecscsi_exit);
	447
	448	MODULE_AUTHOR("Russell King");
	449	MODULE_DESCRIPTION("Powertec SCSI driver");
8d3b33f6	450	module_param_array(term, int, NULL, 0);
1da177e4 LT	451	MODULE_PARM_DESC(term, "SCSI bus termination");
1da177e4 LT	452	MODULE_LICENSE("GPL");