aboutsummaryrefslogtreecommitdiff
path: root/drivers/char/tpm/tpm_infineon.c
diff options
context:
space:
mode:
Diffstat (limited to 'drivers/char/tpm/tpm_infineon.c')
-rw-r--r--drivers/char/tpm/tpm_infineon.c367
1 files changed, 248 insertions, 119 deletions
diff --git a/drivers/char/tpm/tpm_infineon.c b/drivers/char/tpm/tpm_infineon.c
index ec7590951af..dc0a2554034 100644
--- a/drivers/char/tpm/tpm_infineon.c
+++ b/drivers/char/tpm/tpm_infineon.c
@@ -4,10 +4,10 @@
* SLD 9630 TT 1.1 and SLB 9635 TT 1.2 Trusted Platform Module
* Specifications at www.trustedcomputinggroup.org
*
- * Copyright (C) 2005, Marcel Selhorst <selhorst@crypto.rub.de>
- * Sirrix AG - security technologies, http://www.sirrix.com and
+ * Copyright (C) 2005, Marcel Selhorst <tpmdd@selhorst.net>
+ * Sirrix AG - security technologies <tpmdd@sirrix.com> and
* Applied Data Security Group, Ruhr-University Bochum, Germany
- * Project-Homepage: http://www.prosec.rub.de/tpm
+ * Project-Homepage: http://www.trust.rub.de/projects/linux-device-driver-infineon-tpm/
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License as
@@ -15,6 +15,7 @@
* License.
*/
+#include <linux/init.h>
#include <linux/pnp.h>
#include "tpm.h"
@@ -29,11 +30,60 @@
#define TPM_MAX_TRIES 5000
#define TPM_INFINEON_DEV_VEN_VALUE 0x15D1
-/* These values will be filled after PnP-call */
-static int TPM_INF_DATA;
-static int TPM_INF_ADDR;
-static int TPM_INF_BASE;
-static int TPM_INF_PORT_LEN;
+#define TPM_INF_IO_PORT 0x0
+#define TPM_INF_IO_MEM 0x1
+
+#define TPM_INF_ADDR 0x0
+#define TPM_INF_DATA 0x1
+
+struct tpm_inf_dev {
+ int iotype;
+
+ void __iomem *mem_base; /* MMIO ioremap'd addr */
+ unsigned long map_base; /* phys MMIO base */
+ unsigned long map_size; /* MMIO region size */
+ unsigned int index_off; /* index register offset */
+
+ unsigned int data_regs; /* Data registers */
+ unsigned int data_size;
+
+ unsigned int config_port; /* IO Port config index reg */
+ unsigned int config_size;
+};
+
+static struct tpm_inf_dev tpm_dev;
+
+static inline void tpm_data_out(unsigned char data, unsigned char offset)
+{
+ if (tpm_dev.iotype == TPM_INF_IO_PORT)
+ outb(data, tpm_dev.data_regs + offset);
+ else
+ writeb(data, tpm_dev.mem_base + tpm_dev.data_regs + offset);
+}
+
+static inline unsigned char tpm_data_in(unsigned char offset)
+{
+ if (tpm_dev.iotype == TPM_INF_IO_PORT)
+ return inb(tpm_dev.data_regs + offset);
+ else
+ return readb(tpm_dev.mem_base + tpm_dev.data_regs + offset);
+}
+
+static inline void tpm_config_out(unsigned char data, unsigned char offset)
+{
+ if (tpm_dev.iotype == TPM_INF_IO_PORT)
+ outb(data, tpm_dev.config_port + offset);
+ else
+ writeb(data, tpm_dev.mem_base + tpm_dev.index_off + offset);
+}
+
+static inline unsigned char tpm_config_in(unsigned char offset)
+{
+ if (tpm_dev.iotype == TPM_INF_IO_PORT)
+ return inb(tpm_dev.config_port + offset);
+ else
+ return readb(tpm_dev.mem_base + tpm_dev.index_off + offset);
+}
/* TPM header definitions */
enum infineon_tpm_header {
@@ -103,7 +153,7 @@ static int empty_fifo(struct tpm_chip *chip, int clear_wrfifo)
if (clear_wrfifo) {
for (i = 0; i < 4096; i++) {
- status = inb(chip->vendor->base + WRFIFO);
+ status = tpm_data_in(WRFIFO);
if (status == 0xff) {
if (check == 5)
break;
@@ -123,8 +173,8 @@ static int empty_fifo(struct tpm_chip *chip, int clear_wrfifo)
*/
i = 0;
do {
- status = inb(chip->vendor->base + RDFIFO);
- status = inb(chip->vendor->base + STAT);
+ status = tpm_data_in(RDFIFO);
+ status = tpm_data_in(STAT);
i++;
if (i == TPM_MAX_TRIES)
return -EIO;
@@ -137,7 +187,7 @@ static int wait(struct tpm_chip *chip, int wait_for_bit)
int status;
int i;
for (i = 0; i < TPM_MAX_TRIES; i++) {
- status = inb(chip->vendor->base + STAT);
+ status = tpm_data_in(STAT);
/* check the status-register if wait_for_bit is set */
if (status & 1 << wait_for_bit)
break;
@@ -156,7 +206,7 @@ static int wait(struct tpm_chip *chip, int wait_for_bit)
static void wait_and_send(struct tpm_chip *chip, u8 sendbyte)
{
wait(chip, STAT_XFE);
- outb(sendbyte, chip->vendor->base + WRFIFO);
+ tpm_data_out(sendbyte, WRFIFO);
}
/* Note: WTX means Waiting-Time-Extension. Whenever the TPM needs more
@@ -195,6 +245,7 @@ static int tpm_inf_recv(struct tpm_chip *chip, u8 * buf, size_t count)
int i;
int ret;
u32 size = 0;
+ number_of_wtx = 0;
recv_begin:
/* start receiving header */
@@ -202,7 +253,7 @@ recv_begin:
ret = wait(chip, STAT_RDA);
if (ret)
return -EIO;
- buf[i] = inb(chip->vendor->base + RDFIFO);
+ buf[i] = tpm_data_in(RDFIFO);
}
if (buf[0] != TPM_VL_VER) {
@@ -217,7 +268,7 @@ recv_begin:
for (i = 0; i < size; i++) {
wait(chip, STAT_RDA);
- buf[i] = inb(chip->vendor->base + RDFIFO);
+ buf[i] = tpm_data_in(RDFIFO);
}
if ((size == 0x6D00) && (buf[1] == 0x80)) {
@@ -266,7 +317,7 @@ static int tpm_inf_send(struct tpm_chip *chip, u8 * buf, size_t count)
u8 count_high, count_low, count_4, count_3, count_2, count_1;
/* Disabling Reset, LP and IRQC */
- outb(RESET_LP_IRQC_DISABLE, chip->vendor->base + CMD);
+ tpm_data_out(RESET_LP_IRQC_DISABLE, CMD);
ret = empty_fifo(chip, 1);
if (ret) {
@@ -317,54 +368,28 @@ static void tpm_inf_cancel(struct tpm_chip *chip)
static u8 tpm_inf_status(struct tpm_chip *chip)
{
- return inb(chip->vendor->base + STAT);
+ return tpm_data_in(STAT);
}
-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 *inf_attrs[] = {
- &dev_attr_pubek.attr,
- &dev_attr_pcrs.attr,
- &dev_attr_caps.attr,
- &dev_attr_cancel.attr,
- NULL,
-};
-
-static struct attribute_group inf_attr_grp = {.attrs = inf_attrs };
-
-static struct file_operations inf_ops = {
- .owner = THIS_MODULE,
- .llseek = no_llseek,
- .open = tpm_open,
- .read = tpm_read,
- .write = tpm_write,
- .release = tpm_release,
-};
-
-static struct tpm_vendor_specific tpm_inf = {
+static const struct tpm_class_ops tpm_inf = {
.recv = tpm_inf_recv,
.send = tpm_inf_send,
.cancel = tpm_inf_cancel,
.status = tpm_inf_status,
.req_complete_mask = 0,
.req_complete_val = 0,
- .attr_group = &inf_attr_grp,
- .miscdev = {.fops = &inf_ops,},
};
-static const struct pnp_device_id tpm_pnp_tbl[] = {
+static const struct pnp_device_id tpm_inf_pnp_tbl[] = {
/* Infineon TPMs */
{"IFX0101", 0},
{"IFX0102", 0},
{"", 0}
};
-MODULE_DEVICE_TABLE(pnp, tpm_pnp_tbl);
+MODULE_DEVICE_TABLE(pnp, tpm_inf_pnp_tbl);
-static int __devinit tpm_inf_pnp_probe(struct pnp_dev *dev,
+static int tpm_inf_pnp_probe(struct pnp_dev *dev,
const struct pnp_device_id *dev_id)
{
int rc = 0;
@@ -373,45 +398,93 @@ static int __devinit tpm_inf_pnp_probe(struct pnp_dev *dev,
int version[2];
int productid[2];
char chipname[20];
+ struct tpm_chip *chip;
/* read IO-ports through PnP */
if (pnp_port_valid(dev, 0) && pnp_port_valid(dev, 1) &&
!(pnp_port_flags(dev, 0) & IORESOURCE_DISABLED)) {
- TPM_INF_ADDR = pnp_port_start(dev, 0);
- TPM_INF_DATA = (TPM_INF_ADDR + 1);
- TPM_INF_BASE = pnp_port_start(dev, 1);
- TPM_INF_PORT_LEN = pnp_port_len(dev, 1);
- if (!TPM_INF_PORT_LEN)
- return -EINVAL;
+
+ tpm_dev.iotype = TPM_INF_IO_PORT;
+
+ tpm_dev.config_port = pnp_port_start(dev, 0);
+ tpm_dev.config_size = pnp_port_len(dev, 0);
+ tpm_dev.data_regs = pnp_port_start(dev, 1);
+ tpm_dev.data_size = pnp_port_len(dev, 1);
+ if ((tpm_dev.data_size < 4) || (tpm_dev.config_size < 2)) {
+ rc = -EINVAL;
+ goto err_last;
+ }
dev_info(&dev->dev, "Found %s with ID %s\n",
dev->name, dev_id->id);
- if (!((TPM_INF_BASE >> 8) & 0xff))
- return -EINVAL;
+ if (!((tpm_dev.data_regs >> 8) & 0xff)) {
+ rc = -EINVAL;
+ goto err_last;
+ }
/* publish my base address and request region */
- tpm_inf.base = TPM_INF_BASE;
- if (request_region
- (tpm_inf.base, TPM_INF_PORT_LEN, "tpm_infineon0") == NULL) {
- release_region(tpm_inf.base, TPM_INF_PORT_LEN);
- return -EINVAL;
+ if (request_region(tpm_dev.data_regs, tpm_dev.data_size,
+ "tpm_infineon0") == NULL) {
+ rc = -EINVAL;
+ goto err_last;
+ }
+ if (request_region(tpm_dev.config_port, tpm_dev.config_size,
+ "tpm_infineon0") == NULL) {
+ release_region(tpm_dev.data_regs, tpm_dev.data_size);
+ rc = -EINVAL;
+ goto err_last;
}
+ } else if (pnp_mem_valid(dev, 0) &&
+ !(pnp_mem_flags(dev, 0) & IORESOURCE_DISABLED)) {
+
+ tpm_dev.iotype = TPM_INF_IO_MEM;
+
+ tpm_dev.map_base = pnp_mem_start(dev, 0);
+ tpm_dev.map_size = pnp_mem_len(dev, 0);
+
+ dev_info(&dev->dev, "Found %s with ID %s\n",
+ dev->name, dev_id->id);
+
+ /* publish my base address and request region */
+ if (request_mem_region(tpm_dev.map_base, tpm_dev.map_size,
+ "tpm_infineon0") == NULL) {
+ rc = -EINVAL;
+ goto err_last;
+ }
+
+ tpm_dev.mem_base = ioremap(tpm_dev.map_base, tpm_dev.map_size);
+ if (tpm_dev.mem_base == NULL) {
+ release_mem_region(tpm_dev.map_base, tpm_dev.map_size);
+ rc = -EINVAL;
+ goto err_last;
+ }
+
+ /*
+ * The only known MMIO based Infineon TPM system provides
+ * a single large mem region with the device config
+ * registers at the default TPM_ADDR. The data registers
+ * seem like they could be placed anywhere within the MMIO
+ * region, but lets just put them at zero offset.
+ */
+ tpm_dev.index_off = TPM_ADDR;
+ tpm_dev.data_regs = 0x0;
} else {
- return -EINVAL;
+ rc = -EINVAL;
+ goto err_last;
}
/* query chip for its vendor, its version number a.s.o. */
- outb(ENABLE_REGISTER_PAIR, TPM_INF_ADDR);
- outb(IDVENL, TPM_INF_ADDR);
- vendorid[1] = inb(TPM_INF_DATA);
- outb(IDVENH, TPM_INF_ADDR);
- vendorid[0] = inb(TPM_INF_DATA);
- outb(IDPDL, TPM_INF_ADDR);
- productid[1] = inb(TPM_INF_DATA);
- outb(IDPDH, TPM_INF_ADDR);
- productid[0] = inb(TPM_INF_DATA);
- outb(CHIP_ID1, TPM_INF_ADDR);
- version[1] = inb(TPM_INF_DATA);
- outb(CHIP_ID2, TPM_INF_ADDR);
- version[0] = inb(TPM_INF_DATA);
+ tpm_config_out(ENABLE_REGISTER_PAIR, TPM_INF_ADDR);
+ tpm_config_out(IDVENL, TPM_INF_ADDR);
+ vendorid[1] = tpm_config_in(TPM_INF_DATA);
+ tpm_config_out(IDVENH, TPM_INF_ADDR);
+ vendorid[0] = tpm_config_in(TPM_INF_DATA);
+ tpm_config_out(IDPDL, TPM_INF_ADDR);
+ productid[1] = tpm_config_in(TPM_INF_DATA);
+ tpm_config_out(IDPDH, TPM_INF_ADDR);
+ productid[0] = tpm_config_in(TPM_INF_DATA);
+ tpm_config_out(CHIP_ID1, TPM_INF_ADDR);
+ version[1] = tpm_config_in(TPM_INF_DATA);
+ tpm_config_out(CHIP_ID2, TPM_INF_ADDR);
+ version[0] = tpm_config_in(TPM_INF_DATA);
switch ((productid[0] << 8) | productid[1]) {
case 6:
@@ -428,95 +501,151 @@ static int __devinit tpm_inf_pnp_probe(struct pnp_dev *dev,
if ((vendorid[0] << 8 | vendorid[1]) == (TPM_INFINEON_DEV_VEN_VALUE)) {
/* configure TPM with IO-ports */
- outb(IOLIMH, TPM_INF_ADDR);
- outb(((tpm_inf.base >> 8) & 0xff), TPM_INF_DATA);
- outb(IOLIML, TPM_INF_ADDR);
- outb((tpm_inf.base & 0xff), TPM_INF_DATA);
+ tpm_config_out(IOLIMH, TPM_INF_ADDR);
+ tpm_config_out((tpm_dev.data_regs >> 8) & 0xff, TPM_INF_DATA);
+ tpm_config_out(IOLIML, TPM_INF_ADDR);
+ tpm_config_out((tpm_dev.data_regs & 0xff), TPM_INF_DATA);
/* control if IO-ports are set correctly */
- outb(IOLIMH, TPM_INF_ADDR);
- ioh = inb(TPM_INF_DATA);
- outb(IOLIML, TPM_INF_ADDR);
- iol = inb(TPM_INF_DATA);
+ tpm_config_out(IOLIMH, TPM_INF_ADDR);
+ ioh = tpm_config_in(TPM_INF_DATA);
+ tpm_config_out(IOLIML, TPM_INF_ADDR);
+ iol = tpm_config_in(TPM_INF_DATA);
- if ((ioh << 8 | iol) != tpm_inf.base) {
+ if ((ioh << 8 | iol) != tpm_dev.data_regs) {
dev_err(&dev->dev,
- "Could not set IO-ports to 0x%lx\n",
- tpm_inf.base);
- release_region(tpm_inf.base, TPM_INF_PORT_LEN);
- return -EIO;
+ "Could not set IO-data registers to 0x%x\n",
+ tpm_dev.data_regs);
+ rc = -EIO;
+ goto err_release_region;
}
/* activate register */
- outb(TPM_DAR, TPM_INF_ADDR);
- outb(0x01, TPM_INF_DATA);
- outb(DISABLE_REGISTER_PAIR, TPM_INF_ADDR);
+ tpm_config_out(TPM_DAR, TPM_INF_ADDR);
+ tpm_config_out(0x01, TPM_INF_DATA);
+ tpm_config_out(DISABLE_REGISTER_PAIR, TPM_INF_ADDR);
/* disable RESET, LP and IRQC */
- outb(RESET_LP_IRQC_DISABLE, tpm_inf.base + CMD);
+ tpm_data_out(RESET_LP_IRQC_DISABLE, CMD);
/* Finally, we're done, print some infos */
dev_info(&dev->dev, "TPM found: "
- "config base 0x%x, "
- "io base 0x%x, "
- "chip version %02x%02x, "
- "vendor id %x%x (Infineon), "
- "product id %02x%02x"
+ "config base 0x%lx, "
+ "data base 0x%lx, "
+ "chip version 0x%02x%02x, "
+ "vendor id 0x%x%x (Infineon), "
+ "product id 0x%02x%02x"
"%s\n",
- TPM_INF_ADDR,
- TPM_INF_BASE,
+ tpm_dev.iotype == TPM_INF_IO_PORT ?
+ tpm_dev.config_port :
+ tpm_dev.map_base + tpm_dev.index_off,
+ tpm_dev.iotype == TPM_INF_IO_PORT ?
+ tpm_dev.data_regs :
+ tpm_dev.map_base + tpm_dev.data_regs,
version[0], version[1],
vendorid[0], vendorid[1],
productid[0], productid[1], chipname);
- rc = tpm_register_hardware(&dev->dev, &tpm_inf);
- if (rc < 0) {
- release_region(tpm_inf.base, TPM_INF_PORT_LEN);
- return -ENODEV;
- }
+ if (!(chip = tpm_register_hardware(&dev->dev, &tpm_inf)))
+ goto err_release_region;
+
return 0;
} else {
- dev_info(&dev->dev, "No Infineon TPM found!\n");
- return -ENODEV;
+ rc = -ENODEV;
+ goto err_release_region;
+ }
+
+err_release_region:
+ if (tpm_dev.iotype == TPM_INF_IO_PORT) {
+ release_region(tpm_dev.data_regs, tpm_dev.data_size);
+ release_region(tpm_dev.config_port, tpm_dev.config_size);
+ } else {
+ iounmap(tpm_dev.mem_base);
+ release_mem_region(tpm_dev.map_base, tpm_dev.map_size);
}
+
+err_last:
+ return rc;
}
-static __devexit void tpm_inf_pnp_remove(struct pnp_dev *dev)
+static void tpm_inf_pnp_remove(struct pnp_dev *dev)
{
struct tpm_chip *chip = pnp_get_drvdata(dev);
if (chip) {
- release_region(chip->vendor->base, TPM_INF_PORT_LEN);
+ if (tpm_dev.iotype == TPM_INF_IO_PORT) {
+ release_region(tpm_dev.data_regs, tpm_dev.data_size);
+ release_region(tpm_dev.config_port,
+ tpm_dev.config_size);
+ } else {
+ iounmap(tpm_dev.mem_base);
+ release_mem_region(tpm_dev.map_base, tpm_dev.map_size);
+ }
+ tpm_dev_vendor_release(chip);
tpm_remove_hardware(chip->dev);
}
}
-static struct pnp_driver tpm_inf_pnp = {
+static int tpm_inf_pnp_suspend(struct pnp_dev *dev, pm_message_t pm_state)
+{
+ struct tpm_chip *chip = pnp_get_drvdata(dev);
+ int rc;
+ if (chip) {
+ u8 savestate[] = {
+ 0, 193, /* TPM_TAG_RQU_COMMAND */
+ 0, 0, 0, 10, /* blob length (in bytes) */
+ 0, 0, 0, 152 /* TPM_ORD_SaveState */
+ };
+ dev_info(&dev->dev, "saving TPM state\n");
+ rc = tpm_inf_send(chip, savestate, sizeof(savestate));
+ if (rc < 0) {
+ dev_err(&dev->dev, "error while saving TPM state\n");
+ return rc;
+ }
+ }
+ return 0;
+}
+
+static int tpm_inf_pnp_resume(struct pnp_dev *dev)
+{
+ /* Re-configure TPM after suspending */
+ tpm_config_out(ENABLE_REGISTER_PAIR, TPM_INF_ADDR);
+ tpm_config_out(IOLIMH, TPM_INF_ADDR);
+ tpm_config_out((tpm_dev.data_regs >> 8) & 0xff, TPM_INF_DATA);
+ tpm_config_out(IOLIML, TPM_INF_ADDR);
+ tpm_config_out((tpm_dev.data_regs & 0xff), TPM_INF_DATA);
+ /* activate register */
+ tpm_config_out(TPM_DAR, TPM_INF_ADDR);
+ tpm_config_out(0x01, TPM_INF_DATA);
+ tpm_config_out(DISABLE_REGISTER_PAIR, TPM_INF_ADDR);
+ /* disable RESET, LP and IRQC */
+ tpm_data_out(RESET_LP_IRQC_DISABLE, CMD);
+ return tpm_pm_resume(&dev->dev);
+}
+
+static struct pnp_driver tpm_inf_pnp_driver = {
.name = "tpm_inf_pnp",
- .driver = {
- .owner = THIS_MODULE,
- .suspend = tpm_pm_suspend,
- .resume = tpm_pm_resume,
- },
- .id_table = tpm_pnp_tbl,
+ .id_table = tpm_inf_pnp_tbl,
.probe = tpm_inf_pnp_probe,
- .remove = tpm_inf_pnp_remove,
+ .suspend = tpm_inf_pnp_suspend,
+ .resume = tpm_inf_pnp_resume,
+ .remove = tpm_inf_pnp_remove
};
static int __init init_inf(void)
{
- return pnp_register_driver(&tpm_inf_pnp);
+ return pnp_register_driver(&tpm_inf_pnp_driver);
}
static void __exit cleanup_inf(void)
{
- pnp_unregister_driver(&tpm_inf_pnp);
+ pnp_unregister_driver(&tpm_inf_pnp_driver);
}
module_init(init_inf);
module_exit(cleanup_inf);
-MODULE_AUTHOR("Marcel Selhorst <selhorst@crypto.rub.de>");
+MODULE_AUTHOR("Marcel Selhorst <tpmdd@sirrix.com>");
MODULE_DESCRIPTION("Driver for Infineon TPM SLD 9630 TT 1.1 / SLB 9635 TT 1.2");
-MODULE_VERSION("1.6");
+MODULE_VERSION("1.9.2");
MODULE_LICENSE("GPL");
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2025-12-14 16:49:50 +0000