[net-next-2.6.git] / drivers / char / tpm / tpm_nsc.c

/*
 * Copyright (C) 2004 IBM Corporation
 *
 * Authors:
 * Leendert van Doorn <leendert@watson.ibm.com>
 * Dave Safford <safford@watson.ibm.com>
 * Reiner Sailer <sailer@watson.ibm.com>
 * Kylene Hall <kjhall@us.ibm.com>
 *
 * Maintained by: <tpmdd_devel@lists.sourceforge.net>
 *
 * Device driver for TCG/TCPA TPM (trusted platform module).
 * Specifications at www.trustedcomputinggroup.org	 
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License as
 * published by the Free Software Foundation, version 2 of the
 * License.
 * 
 */

#include "tpm.h"

/* National definitions */
enum tpm_nsc_addr{
	TPM_NSC_IRQ = 0x07,
	TPM_NSC_BASE0_HI = 0x60,
	TPM_NSC_BASE0_LO = 0x61,
	TPM_NSC_BASE1_HI = 0x62,
	TPM_NSC_BASE1_LO = 0x63
};

enum tpm_nsc_index {
	NSC_LDN_INDEX = 0x07,
	NSC_SID_INDEX = 0x20,
	NSC_LDC_INDEX = 0x30,
	NSC_DIO_INDEX = 0x60,
	NSC_CIO_INDEX = 0x62,
	NSC_IRQ_INDEX = 0x70,
	NSC_ITS_INDEX = 0x71
};

enum tpm_nsc_status_loc {
	NSC_STATUS = 0x01,
	NSC_COMMAND = 0x01,
	NSC_DATA = 0x00
};

/* status bits */
enum tpm_nsc_status {
	NSC_STATUS_OBF = 0x01,	/* output buffer full */
	NSC_STATUS_IBF = 0x02,	/* input buffer full */
	NSC_STATUS_F0 = 0x04,	/* F0 */
	NSC_STATUS_A2 = 0x08,	/* A2 */
	NSC_STATUS_RDY = 0x10,	/* ready to receive command */
	NSC_STATUS_IBR = 0x20	/* ready to receive data */
};

/* command bits */
enum tpm_nsc_cmd_mode {
	NSC_COMMAND_NORMAL = 0x01,	/* normal mode */
	NSC_COMMAND_EOC = 0x03,
	NSC_COMMAND_CANCEL = 0x22
};
/*
 * Wait for a certain status to appear
 */
static int wait_for_stat(struct tpm_chip *chip, u8 mask, u8 val, u8 * data)
{
	unsigned long stop;

	/* status immediately available check */
	*data = inb(chip->vendor->base + NSC_STATUS);
	if ((*data & mask) == val)
		return 0;

	/* wait for status */
	stop = jiffies + 10 * HZ;
	do {
		msleep(TPM_TIMEOUT);
		*data = inb(chip->vendor->base + 1);
		if ((*data & mask) == val)
			return 0;
	}
	while (time_before(jiffies, stop));

	return -EBUSY;
}

static int nsc_wait_for_ready(struct tpm_chip *chip)
{
	int status;
	unsigned long stop;

	/* status immediately available check */
	status = inb(chip->vendor->base + NSC_STATUS);
	if (status & NSC_STATUS_OBF)
		status = inb(chip->vendor->base + NSC_DATA);
	if (status & NSC_STATUS_RDY)
		return 0;

	/* wait for status */
	stop = jiffies + 100;
	do {
		msleep(TPM_TIMEOUT);
		status = inb(chip->vendor->base + NSC_STATUS);
		if (status & NSC_STATUS_OBF)
			status = inb(chip->vendor->base + NSC_DATA);
		if (status & NSC_STATUS_RDY)
			return 0;
	}
	while (time_before(jiffies, stop));

	dev_info(chip->dev, "wait for ready failed\n");
	return -EBUSY;
}


static int tpm_nsc_recv(struct tpm_chip *chip, u8 * buf, size_t count)
{
	u8 *buffer = buf;
	u8 data, *p;
	u32 size;
	__be32 *native_size;

	if (count < 6)
		return -EIO;

	if (wait_for_stat(chip, NSC_STATUS_F0, NSC_STATUS_F0, &data) < 0) {
		dev_err(chip->dev, "F0 timeout\n");
		return -EIO;
	}
	if ((data =
	     inb(chip->vendor->base + NSC_DATA)) != NSC_COMMAND_NORMAL) {
		dev_err(chip->dev, "not in normal mode (0x%x)\n",
			data);
		return -EIO;
	}

	/* read the whole packet */
	for (p = buffer; p < &buffer[count]; p++) {
		if (wait_for_stat
		    (chip, NSC_STATUS_OBF, NSC_STATUS_OBF, &data) < 0) {
			dev_err(chip->dev,
				"OBF timeout (while reading data)\n");
			return -EIO;
		}
		if (data & NSC_STATUS_F0)
			break;
		*p = inb(chip->vendor->base + NSC_DATA);
	}

	if ((data & NSC_STATUS_F0) == 0 &&
	(wait_for_stat(chip, NSC_STATUS_F0, NSC_STATUS_F0, &data) < 0)) {
		dev_err(chip->dev, "F0 not set\n");
		return -EIO;
	}
	if ((data = inb(chip->vendor->base + NSC_DATA)) != NSC_COMMAND_EOC) {
		dev_err(chip->dev,
			"expected end of command(0x%x)\n", data);
		return -EIO;
	}

	native_size = (__force __be32 *) (buf + 2);
	size = be32_to_cpu(*native_size);

	if (count < size)
		return -EIO;

	return size;
}

static int tpm_nsc_send(struct tpm_chip *chip, u8 * buf, size_t count)
{
	u8 data;
	int i;

	/*
	 * If we hit the chip with back to back commands it locks up
	 * and never set IBF. Hitting it with this "hammer" seems to
	 * fix it. Not sure why this is needed, we followed the flow
	 * chart in the manual to the letter.
	 */
	outb(NSC_COMMAND_CANCEL, chip->vendor->base + NSC_COMMAND);

	if (nsc_wait_for_ready(chip) != 0)
		return -EIO;

	if (wait_for_stat(chip, NSC_STATUS_IBF, 0, &data) < 0) {
		dev_err(chip->dev, "IBF timeout\n");
		return -EIO;
	}

	outb(NSC_COMMAND_NORMAL, chip->vendor->base + NSC_COMMAND);
	if (wait_for_stat(chip, NSC_STATUS_IBR, NSC_STATUS_IBR, &data) < 0) {
		dev_err(chip->dev, "IBR timeout\n");
		return -EIO;
	}

	for (i = 0; i < count; i++) {
		if (wait_for_stat(chip, NSC_STATUS_IBF, 0, &data) < 0) {
			dev_err(chip->dev,
				"IBF timeout (while writing data)\n");
			return -EIO;
		}
		outb(buf[i], chip->vendor->base + NSC_DATA);
	}

	if (wait_for_stat(chip, NSC_STATUS_IBF, 0, &data) < 0) {
		dev_err(chip->dev, "IBF timeout\n");
		return -EIO;
	}
	outb(NSC_COMMAND_EOC, chip->vendor->base + NSC_COMMAND);

	return count;
}

static void tpm_nsc_cancel(struct tpm_chip *chip)
{
	outb(NSC_COMMAND_CANCEL, chip->vendor->base + NSC_COMMAND);
}

static u8 tpm_nsc_status(struct tpm_chip *chip)
{
	return inb(chip->vendor->base + NSC_STATUS);
}

static struct file_operations nsc_ops = {
	.owner = THIS_MODULE,
	.llseek = no_llseek,
	.open = tpm_open,
	.read = tpm_read,
	.write = tpm_write,
	.release = tpm_release,
};

static DEVICE_ATTR(pubek, S_IRUGO, tpm_show_pubek, NULL);
static DEVICE_ATTR(pcrs, S_IRUGO, tpm_show_pcrs, NULL);
static DEVICE_ATTR(caps, S_IRUGO, tpm_show_caps, NULL);
static DEVICE_ATTR(cancel, S_IWUSR|S_IWGRP, NULL, tpm_store_cancel);

static struct attribute * nsc_attrs[] = {
	&dev_attr_pubek.attr,
	&dev_attr_pcrs.attr,
	&dev_attr_caps.attr,
	&dev_attr_cancel.attr,
	NULL,
};

static struct attribute_group nsc_attr_grp = { .attrs = nsc_attrs };

static struct tpm_vendor_specific tpm_nsc = {
	.recv = tpm_nsc_recv,
	.send = tpm_nsc_send,
	.cancel = tpm_nsc_cancel,
	.status = tpm_nsc_status,
	.req_complete_mask = NSC_STATUS_OBF,
	.req_complete_val = NSC_STATUS_OBF,
	.req_canceled = NSC_STATUS_RDY,
	.attr_group = &nsc_attr_grp,
	.miscdev = { .fops = &nsc_ops, },
};

static struct platform_device *pdev = NULL;

static void __devexit tpm_nsc_remove(struct device *dev)
{
	struct tpm_chip *chip = dev_get_drvdata(dev);
	if ( chip ) {
		release_region(chip->vendor->base, 2);
		tpm_remove_hardware(chip->dev);
	}
}

static struct device_driver nsc_drv = {
	.name = "tpm_nsc",
	.bus = &platform_bus_type,
	.owner = THIS_MODULE,
	.suspend = tpm_pm_suspend,
	.resume = tpm_pm_resume,
};

static int __init init_nsc(void)
{
	int rc = 0;
	int lo, hi;
	int nscAddrBase = TPM_ADDR;

	driver_register(&nsc_drv);

	/* select PM channel 1 */
	tpm_write_index(nscAddrBase,NSC_LDN_INDEX, 0x12);

	/* verify that it is a National part (SID) */
	if (tpm_read_index(TPM_ADDR, NSC_SID_INDEX) != 0xEF) {
		nscAddrBase = (tpm_read_index(TPM_SUPERIO_ADDR, 0x2C)<<8)|
			(tpm_read_index(TPM_SUPERIO_ADDR, 0x2B)&0xFE);
		if (tpm_read_index(nscAddrBase, NSC_SID_INDEX) != 0xF6)
			return -ENODEV;
	}

	hi = tpm_read_index(nscAddrBase, TPM_NSC_BASE0_HI);
	lo = tpm_read_index(nscAddrBase, TPM_NSC_BASE0_LO);
	tpm_nsc.base = (hi<<8) | lo;

	/* enable the DPM module */
	tpm_write_index(nscAddrBase, NSC_LDC_INDEX, 0x01);

	pdev = kmalloc(sizeof(struct platform_device), GFP_KERNEL);
	if ( !pdev )
		return -ENOMEM;

	memset(pdev, 0, sizeof(struct platform_device));

	pdev->name = "tpm_nscl0";
	pdev->id = -1;
	pdev->num_resources = 0;
	pdev->dev.release = tpm_nsc_remove;
	pdev->dev.driver = &nsc_drv;

	if ((rc=platform_device_register(pdev)) < 0) {
		kfree(pdev);
		pdev = NULL;
		return rc;
	}

	if (request_region(tpm_nsc.base, 2, "tpm_nsc0") == NULL ) {
		platform_device_unregister(pdev);
		kfree(pdev);
		pdev = NULL;
		return -EBUSY;
	}

	if ((rc = tpm_register_hardware(&pdev->dev, &tpm_nsc)) < 0) {
		release_region(tpm_nsc.base, 2);
		platform_device_unregister(pdev);
		kfree(pdev);
		pdev = NULL;
		return rc;
	}

	dev_dbg(&pdev->dev, "NSC TPM detected\n");
	dev_dbg(&pdev->dev,
		"NSC LDN 0x%x, SID 0x%x, SRID 0x%x\n",
		tpm_read_index(nscAddrBase,0x07), tpm_read_index(nscAddrBase,0x20),
		tpm_read_index(nscAddrBase,0x27));
	dev_dbg(&pdev->dev,
		"NSC SIOCF1 0x%x SIOCF5 0x%x SIOCF6 0x%x SIOCF8 0x%x\n",
		tpm_read_index(nscAddrBase,0x21), tpm_read_index(nscAddrBase,0x25),
		tpm_read_index(nscAddrBase,0x26), tpm_read_index(nscAddrBase,0x28));
	dev_dbg(&pdev->dev, "NSC IO Base0 0x%x\n",
		(tpm_read_index(nscAddrBase,0x60) << 8) | tpm_read_index(nscAddrBase,0x61));
	dev_dbg(&pdev->dev, "NSC IO Base1 0x%x\n",
		(tpm_read_index(nscAddrBase,0x62) << 8) | tpm_read_index(nscAddrBase,0x63));
	dev_dbg(&pdev->dev, "NSC Interrupt number and wakeup 0x%x\n",
		tpm_read_index(nscAddrBase,0x70));
	dev_dbg(&pdev->dev, "NSC IRQ type select 0x%x\n",
		tpm_read_index(nscAddrBase,0x71));
	dev_dbg(&pdev->dev,
		"NSC DMA channel select0 0x%x, select1 0x%x\n",
		tpm_read_index(nscAddrBase,0x74), tpm_read_index(nscAddrBase,0x75));
	dev_dbg(&pdev->dev,
		"NSC Config "
		"0x%x 0x%x 0x%x 0x%x 0x%x 0x%x 0x%x 0x%x 0x%x 0x%x\n",
		tpm_read_index(nscAddrBase,0xF0), tpm_read_index(nscAddrBase,0xF1),
		tpm_read_index(nscAddrBase,0xF2), tpm_read_index(nscAddrBase,0xF3),
		tpm_read_index(nscAddrBase,0xF4), tpm_read_index(nscAddrBase,0xF5),
		tpm_read_index(nscAddrBase,0xF6), tpm_read_index(nscAddrBase,0xF7),
		tpm_read_index(nscAddrBase,0xF8), tpm_read_index(nscAddrBase,0xF9));

	dev_info(&pdev->dev,
		 "NSC TPM revision %d\n",
		 tpm_read_index(nscAddrBase, 0x27) & 0x1F);

	return 0;
}

static void __exit cleanup_nsc(void)
{
	if (pdev) {
		tpm_nsc_remove(&pdev->dev);
		platform_device_unregister(pdev);
		kfree(pdev);
		pdev = NULL;
	}

	driver_unregister(&nsc_drv);
}

module_init(init_nsc);
module_exit(cleanup_nsc);

MODULE_AUTHOR("Leendert van Doorn (leendert@watson.ibm.com)");
MODULE_DESCRIPTION("TPM Driver");
MODULE_VERSION("2.0");
MODULE_LICENSE("GPL");
Commit	Line	Data
1da177e4 LT	1	/*
	2	* Copyright (C) 2004 IBM Corporation
	3	*
	4	* Authors:
	5	* Leendert van Doorn <leendert@watson.ibm.com>
	6	* Dave Safford <safford@watson.ibm.com>
	7	* Reiner Sailer <sailer@watson.ibm.com>
	8	* Kylene Hall <kjhall@us.ibm.com>
	9	*
	10	* Maintained by: <tpmdd_devel@lists.sourceforge.net>
	11	*
	12	* Device driver for TCG/TCPA TPM (trusted platform module).
	13	* Specifications at www.trustedcomputinggroup.org
	14	*
	15	* This program is free software; you can redistribute it and/or
	16	* modify it under the terms of the GNU General Public License as
	17	* published by the Free Software Foundation, version 2 of the
	18	* License.
	19	*
	20	*/
	21
	22	#include "tpm.h"
	23
	24	/* National definitions */
e1a23c66	25	enum tpm_nsc_addr{
e1a23c66 KH	26	TPM_NSC_IRQ = 0x07,
	27	TPM_NSC_BASE0_HI = 0x60,
	28	TPM_NSC_BASE0_LO = 0x61,
	29	TPM_NSC_BASE1_HI = 0x62,
	30	TPM_NSC_BASE1_LO = 0x63
3122a88a	31	};
1da177e4	32
3122a88a KH	33	enum tpm_nsc_index {
	34	NSC_LDN_INDEX = 0x07,
	35	NSC_SID_INDEX = 0x20,
	36	NSC_LDC_INDEX = 0x30,
	37	NSC_DIO_INDEX = 0x60,
	38	NSC_CIO_INDEX = 0x62,
	39	NSC_IRQ_INDEX = 0x70,
	40	NSC_ITS_INDEX = 0x71
	41	};
1da177e4	42
3122a88a KH	43	enum tpm_nsc_status_loc {
	44	NSC_STATUS = 0x01,
	45	NSC_COMMAND = 0x01,
	46	NSC_DATA = 0x00
	47	};
1da177e4 LT	48
1da177e4 LT	49	/* status bits */
e1a23c66	50	enum tpm_nsc_status {
3122a88a KH	51	NSC_STATUS_OBF = 0x01, /* output buffer full */
	52	NSC_STATUS_IBF = 0x02, /* input buffer full */
	53	NSC_STATUS_F0 = 0x04, /* F0 */
	54	NSC_STATUS_A2 = 0x08, /* A2 */
	55	NSC_STATUS_RDY = 0x10, /* ready to receive command */
	56	NSC_STATUS_IBR = 0x20 /* ready to receive data */
	57	};
daacdfa6	58
1da177e4	59	/* command bits */
3122a88a KH	60	enum tpm_nsc_cmd_mode {
	61	NSC_COMMAND_NORMAL = 0x01, /* normal mode */
	62	NSC_COMMAND_EOC = 0x03,
	63	NSC_COMMAND_CANCEL = 0x22
	64	};
1da177e4 LT	65	/*
	66	* Wait for a certain status to appear
	67	*/
	68	static int wait_for_stat(struct tpm_chip chip, u8 mask, u8 val, u8 data)
	69	{
700d8bdc	70	unsigned long stop;
1da177e4 LT	71
	72	/* status immediately available check */
	73	*data = inb(chip->vendor->base + NSC_STATUS);
	74	if ((*data & mask) == val)
	75	return 0;
	76
	77	/* wait for status */
700d8bdc	78	stop = jiffies + 10 * HZ;
1da177e4	79	do {
700d8bdc	80	msleep(TPM_TIMEOUT);
1da177e4	81	*data = inb(chip->vendor->base + 1);
700d8bdc	82	if ((*data & mask) == val)
1da177e4	83	return 0;
1da177e4	84	}
700d8bdc	85	while (time_before(jiffies, stop));
1da177e4 LT	86
	87	return -EBUSY;
	88	}
	89
	90	static int nsc_wait_for_ready(struct tpm_chip *chip)
	91	{
	92	int status;
700d8bdc	93	unsigned long stop;
1da177e4 LT	94
	95	/* status immediately available check */
	96	status = inb(chip->vendor->base + NSC_STATUS);
	97	if (status & NSC_STATUS_OBF)
	98	status = inb(chip->vendor->base + NSC_DATA);
	99	if (status & NSC_STATUS_RDY)
	100	return 0;
	101
	102	/* wait for status */
700d8bdc	103	stop = jiffies + 100;
1da177e4	104	do {
700d8bdc	105	msleep(TPM_TIMEOUT);
1da177e4 LT	106	status = inb(chip->vendor->base + NSC_STATUS);
	107	if (status & NSC_STATUS_OBF)
	108	status = inb(chip->vendor->base + NSC_DATA);
700d8bdc	109	if (status & NSC_STATUS_RDY)
1da177e4	110	return 0;
1da177e4	111	}
700d8bdc	112	while (time_before(jiffies, stop));
1da177e4	113
e659a3fe	114	dev_info(chip->dev, "wait for ready failed\n");
1da177e4 LT	115	return -EBUSY;
	116	}
	117
	118
	119	static int tpm_nsc_recv(struct tpm_chip chip, u8 buf, size_t count)
	120	{
	121	u8 *buffer = buf;
	122	u8 data, *p;
	123	u32 size;
	124	__be32 *native_size;
	125
	126	if (count < 6)
	127	return -EIO;
	128
	129	if (wait_for_stat(chip, NSC_STATUS_F0, NSC_STATUS_F0, &data) < 0) {
e659a3fe	130	dev_err(chip->dev, "F0 timeout\n");
1da177e4 LT	131	return -EIO;
	132	}
	133	if ((data =
	134	inb(chip->vendor->base + NSC_DATA)) != NSC_COMMAND_NORMAL) {
e659a3fe	135	dev_err(chip->dev, "not in normal mode (0x%x)\n",
1da177e4 LT	136	data);
	137	return -EIO;
	138	}
	139
	140	/* read the whole packet */
	141	for (p = buffer; p < &buffer[count]; p++) {
	142	if (wait_for_stat
	143	(chip, NSC_STATUS_OBF, NSC_STATUS_OBF, &data) < 0) {
e659a3fe	144	dev_err(chip->dev,
1da177e4 LT	145	"OBF timeout (while reading data)\n");
	146	return -EIO;
	147	}
	148	if (data & NSC_STATUS_F0)
	149	break;
	150	*p = inb(chip->vendor->base + NSC_DATA);
	151	}
	152
daacdfa6 KJH	153	if ((data & NSC_STATUS_F0) == 0 &&
daacdfa6 KJH	154	(wait_for_stat(chip, NSC_STATUS_F0, NSC_STATUS_F0, &data) < 0)) {
e659a3fe	155	dev_err(chip->dev, "F0 not set\n");
1da177e4 LT	156	return -EIO;
	157	}
	158	if ((data = inb(chip->vendor->base + NSC_DATA)) != NSC_COMMAND_EOC) {
e659a3fe	159	dev_err(chip->dev,
1da177e4 LT	160	"expected end of command(0x%x)\n", data);
	161	return -EIO;
	162	}
	163
	164	native_size = (__force __be32 *) (buf + 2);
	165	size = be32_to_cpu(*native_size);
	166
	167	if (count < size)
	168	return -EIO;
	169
	170	return size;
	171	}
	172
	173	static int tpm_nsc_send(struct tpm_chip chip, u8 buf, size_t count)
	174	{
	175	u8 data;
	176	int i;
	177
	178	/*
	179	* If we hit the chip with back to back commands it locks up
	180	* and never set IBF. Hitting it with this "hammer" seems to
	181	* fix it. Not sure why this is needed, we followed the flow
	182	* chart in the manual to the letter.
	183	*/
	184	outb(NSC_COMMAND_CANCEL, chip->vendor->base + NSC_COMMAND);
	185
	186	if (nsc_wait_for_ready(chip) != 0)
	187	return -EIO;
	188
	189	if (wait_for_stat(chip, NSC_STATUS_IBF, 0, &data) < 0) {
e659a3fe	190	dev_err(chip->dev, "IBF timeout\n");
1da177e4 LT	191	return -EIO;
	192	}
	193
	194	outb(NSC_COMMAND_NORMAL, chip->vendor->base + NSC_COMMAND);
	195	if (wait_for_stat(chip, NSC_STATUS_IBR, NSC_STATUS_IBR, &data) < 0) {
e659a3fe	196	dev_err(chip->dev, "IBR timeout\n");
1da177e4 LT	197	return -EIO;
	198	}
	199
	200	for (i = 0; i < count; i++) {
	201	if (wait_for_stat(chip, NSC_STATUS_IBF, 0, &data) < 0) {
e659a3fe	202	dev_err(chip->dev,
1da177e4 LT	203	"IBF timeout (while writing data)\n");
	204	return -EIO;
	205	}
	206	outb(buf[i], chip->vendor->base + NSC_DATA);
	207	}
	208
	209	if (wait_for_stat(chip, NSC_STATUS_IBF, 0, &data) < 0) {
e659a3fe	210	dev_err(chip->dev, "IBF timeout\n");
1da177e4 LT	211	return -EIO;
	212	}
	213	outb(NSC_COMMAND_EOC, chip->vendor->base + NSC_COMMAND);
	214
	215	return count;
	216	}
	217
	218	static void tpm_nsc_cancel(struct tpm_chip *chip)
	219	{
	220	outb(NSC_COMMAND_CANCEL, chip->vendor->base + NSC_COMMAND);
	221	}
	222
b4ed3e3c KJH	223	static u8 tpm_nsc_status(struct tpm_chip *chip)
	224	{
	225	return inb(chip->vendor->base + NSC_STATUS);
	226	}
	227
1da177e4 LT	228	static struct file_operations nsc_ops = {
	229	.owner = THIS_MODULE,
	230	.llseek = no_llseek,
	231	.open = tpm_open,
	232	.read = tpm_read,
	233	.write = tpm_write,
	234	.release = tpm_release,
	235	};
	236
6659ca2a KH	237	static DEVICE_ATTR(pubek, S_IRUGO, tpm_show_pubek, NULL);
	238	static DEVICE_ATTR(pcrs, S_IRUGO, tpm_show_pcrs, NULL);
	239	static DEVICE_ATTR(caps, S_IRUGO, tpm_show_caps, NULL);
	240	static DEVICE_ATTR(cancel, S_IWUSR\|S_IWGRP, NULL, tpm_store_cancel);
	241
	242	static struct attribute * nsc_attrs[] = {
	243	&dev_attr_pubek.attr,
	244	&dev_attr_pcrs.attr,
	245	&dev_attr_caps.attr,
	246	&dev_attr_cancel.attr,
874ec33f	247	NULL,
6659ca2a KH	248	};
	249
	250	static struct attribute_group nsc_attr_grp = { .attrs = nsc_attrs };
	251
1da177e4 LT	252	static struct tpm_vendor_specific tpm_nsc = {
	253	.recv = tpm_nsc_recv,
	254	.send = tpm_nsc_send,
	255	.cancel = tpm_nsc_cancel,
b4ed3e3c	256	.status = tpm_nsc_status,
1da177e4 LT	257	.req_complete_mask = NSC_STATUS_OBF,
1da177e4 LT	258	.req_complete_val = NSC_STATUS_OBF,
d9e5b6bf	259	.req_canceled = NSC_STATUS_RDY,
6659ca2a	260	.attr_group = &nsc_attr_grp,
1da177e4	261	.miscdev = { .fops = &nsc_ops, },
1da177e4 LT	262	};
1da177e4 LT	263
570302a3 KJH	264	static struct platform_device *pdev = NULL;
	265
	266	static void __devexit tpm_nsc_remove(struct device *dev)
	267	{
	268	struct tpm_chip *chip = dev_get_drvdata(dev);
	269	if ( chip ) {
	270	release_region(chip->vendor->base, 2);
	271	tpm_remove_hardware(chip->dev);
	272	}
	273	}
	274
	275	static struct device_driver nsc_drv = {
	276	.name = "tpm_nsc",
	277	.bus = &platform_bus_type,
	278	.owner = THIS_MODULE,
	279	.suspend = tpm_pm_suspend,
	280	.resume = tpm_pm_resume,
	281	};
	282
	283	static int __init init_nsc(void)
1da177e4 LT	284	{
1da177e4 LT	285	int rc = 0;
e1a23c66	286	int lo, hi;
daacdfa6	287	int nscAddrBase = TPM_ADDR;
e1a23c66	288
570302a3	289	driver_register(&nsc_drv);
1da177e4	290
daacdfa6 KJH	291	/* select PM channel 1 */
	292	tpm_write_index(nscAddrBase,NSC_LDN_INDEX, 0x12);
	293
1da177e4	294	/* verify that it is a National part (SID) */
daacdfa6 KJH	295	if (tpm_read_index(TPM_ADDR, NSC_SID_INDEX) != 0xEF) {
	296	nscAddrBase = (tpm_read_index(TPM_SUPERIO_ADDR, 0x2C)<<8)\|
	297	(tpm_read_index(TPM_SUPERIO_ADDR, 0x2B)&0xFE);
570302a3 KJH	298	if (tpm_read_index(nscAddrBase, NSC_SID_INDEX) != 0xF6)
570302a3 KJH	299	return -ENODEV;
1da177e4 LT	300	}
1da177e4 LT	301
daacdfa6 KJH	302	hi = tpm_read_index(nscAddrBase, TPM_NSC_BASE0_HI);
	303	lo = tpm_read_index(nscAddrBase, TPM_NSC_BASE0_LO);
	304	tpm_nsc.base = (hi<<8) \| lo;
	305
570302a3 KJH	306	/* enable the DPM module */
	307	tpm_write_index(nscAddrBase, NSC_LDC_INDEX, 0x01);
	308
	309	pdev = kmalloc(sizeof(struct platform_device), GFP_KERNEL);
	310	if ( !pdev )
	311	return -ENOMEM;
	312
	313	memset(pdev, 0, sizeof(struct platform_device));
	314
	315	pdev->name = "tpm_nscl0";
	316	pdev->id = -1;
	317	pdev->num_resources = 0;
	318	pdev->dev.release = tpm_nsc_remove;
	319	pdev->dev.driver = &nsc_drv;
	320
	321	if ((rc=platform_device_register(pdev)) < 0) {
	322	kfree(pdev);
	323	pdev = NULL;
	324	return rc;
	325	}
	326
	327	if (request_region(tpm_nsc.base, 2, "tpm_nsc0") == NULL ) {
	328	platform_device_unregister(pdev);
	329	kfree(pdev);
	330	pdev = NULL;
	331	return -EBUSY;
	332	}
	333
	334	if ((rc = tpm_register_hardware(&pdev->dev, &tpm_nsc)) < 0) {
	335	release_region(tpm_nsc.base, 2);
	336	platform_device_unregister(pdev);
	337	kfree(pdev);
	338	pdev = NULL;
	339	return rc;
	340	}
	341
	342	dev_dbg(&pdev->dev, "NSC TPM detected\n");
	343	dev_dbg(&pdev->dev,
1da177e4	344	"NSC LDN 0x%x, SID 0x%x, SRID 0x%x\n",
daacdfa6 KJH	345	tpm_read_index(nscAddrBase,0x07), tpm_read_index(nscAddrBase,0x20),
daacdfa6 KJH	346	tpm_read_index(nscAddrBase,0x27));
570302a3	347	dev_dbg(&pdev->dev,
1da177e4	348	"NSC SIOCF1 0x%x SIOCF5 0x%x SIOCF6 0x%x SIOCF8 0x%x\n",
daacdfa6 KJH	349	tpm_read_index(nscAddrBase,0x21), tpm_read_index(nscAddrBase,0x25),
daacdfa6 KJH	350	tpm_read_index(nscAddrBase,0x26), tpm_read_index(nscAddrBase,0x28));
570302a3	351	dev_dbg(&pdev->dev, "NSC IO Base0 0x%x\n",
daacdfa6	352	(tpm_read_index(nscAddrBase,0x60) << 8) \| tpm_read_index(nscAddrBase,0x61));
570302a3	353	dev_dbg(&pdev->dev, "NSC IO Base1 0x%x\n",
daacdfa6	354	(tpm_read_index(nscAddrBase,0x62) << 8) \| tpm_read_index(nscAddrBase,0x63));
570302a3	355	dev_dbg(&pdev->dev, "NSC Interrupt number and wakeup 0x%x\n",
daacdfa6	356	tpm_read_index(nscAddrBase,0x70));
570302a3	357	dev_dbg(&pdev->dev, "NSC IRQ type select 0x%x\n",
daacdfa6	358	tpm_read_index(nscAddrBase,0x71));
570302a3	359	dev_dbg(&pdev->dev,
1da177e4	360	"NSC DMA channel select0 0x%x, select1 0x%x\n",
daacdfa6	361	tpm_read_index(nscAddrBase,0x74), tpm_read_index(nscAddrBase,0x75));
570302a3	362	dev_dbg(&pdev->dev,
1da177e4 LT	363	"NSC Config "
1da177e4 LT	364	"0x%x 0x%x 0x%x 0x%x 0x%x 0x%x 0x%x 0x%x 0x%x 0x%x\n",
daacdfa6 KJH	365	tpm_read_index(nscAddrBase,0xF0), tpm_read_index(nscAddrBase,0xF1),
	366	tpm_read_index(nscAddrBase,0xF2), tpm_read_index(nscAddrBase,0xF3),
	367	tpm_read_index(nscAddrBase,0xF4), tpm_read_index(nscAddrBase,0xF5),
	368	tpm_read_index(nscAddrBase,0xF6), tpm_read_index(nscAddrBase,0xF7),
	369	tpm_read_index(nscAddrBase,0xF8), tpm_read_index(nscAddrBase,0xF9));
1da177e4	370
570302a3	371	dev_info(&pdev->dev,
daacdfa6 KJH	372	"NSC TPM revision %d\n",
daacdfa6 KJH	373	tpm_read_index(nscAddrBase, 0x27) & 0x1F);
1da177e4	374
1da177e4	375	return 0;
1da177e4 LT	376	}
	377
	378	static void __exit cleanup_nsc(void)
	379	{
570302a3 KJH	380	if (pdev) {
	381	tpm_nsc_remove(&pdev->dev);
	382	platform_device_unregister(pdev);
	383	kfree(pdev);
	384	pdev = NULL;
	385	}
	386
	387	driver_unregister(&nsc_drv);
1da177e4 LT	388	}
	389
	390	module_init(init_nsc);
	391	module_exit(cleanup_nsc);
	392
	393	MODULE_AUTHOR("Leendert van Doorn (leendert@watson.ibm.com)");
	394	MODULE_DESCRIPTION("TPM Driver");
	395	MODULE_VERSION("2.0");
	396	MODULE_LICENSE("GPL");