aboutsummaryrefslogtreecommitdiff
path: root/drivers/char
diff options
context:
space:
mode:
Diffstat (limited to 'drivers/char')
-rw-r--r--drivers/char/rtc.c7
-rw-r--r--drivers/char/tpm/Kconfig11
-rw-r--r--drivers/char/tpm/tpm_infineon.c146
-rw-r--r--drivers/char/watchdog/i8xx_tco.c41
-rw-r--r--drivers/char/watchdog/sa1100_wdt.c49
5 files changed, 156 insertions, 98 deletions
diff --git a/drivers/char/rtc.c b/drivers/char/rtc.c
index d8f9e94ae47..cd4fe8b1709 100644
--- a/drivers/char/rtc.c
+++ b/drivers/char/rtc.c
@@ -1209,6 +1209,7 @@ static int rtc_proc_open(struct inode *inode, struct file *file)
void rtc_get_rtc_time(struct rtc_time *rtc_tm)
{
+ unsigned long uip_watchdog = jiffies;
unsigned char ctrl;
#ifdef CONFIG_MACH_DECSTATION
unsigned int real_year;
@@ -1224,8 +1225,10 @@ void rtc_get_rtc_time(struct rtc_time *rtc_tm)
* Once the read clears, read the RTC time (again via ioctl). Easy.
*/
- if (rtc_is_updating() != 0)
- msleep(20);
+ while (rtc_is_updating() != 0 && jiffies - uip_watchdog < 2*HZ/100) {
+ barrier();
+ cpu_relax();
+ }
/*
* Only the values that we read from the RTC are set. We leave
diff --git a/drivers/char/tpm/Kconfig b/drivers/char/tpm/Kconfig
index 94a3b3e20bf..79e9832ef1f 100644
--- a/drivers/char/tpm/Kconfig
+++ b/drivers/char/tpm/Kconfig
@@ -17,6 +17,8 @@ config TCG_TPM
obtained at: <http://sourceforge.net/projects/trousers>. To
compile this driver as a module, choose M here; the module
will be called tpm. If unsure, say N.
+ Note: For more TPM drivers enable CONFIG_PNP, CONFIG_ACPI_BUS
+ and CONFIG_PNPACPI.
config TCG_NSC
tristate "National Semiconductor TPM Interface"
@@ -36,12 +38,13 @@ config TCG_ATMEL
as a module, choose M here; the module will be called tpm_atmel.
config TCG_INFINEON
- tristate "Infineon Technologies SLD 9630 TPM Interface"
- depends on TCG_TPM
+ tristate "Infineon Technologies TPM Interface"
+ depends on TCG_TPM && PNPACPI
---help---
If you have a TPM security chip from Infineon Technologies
- say Yes and it will be accessible from within Linux. To
- compile this driver as a module, choose M here; the module
+ (either SLD 9630 TT 1.1 or SLB 9635 TT 1.2) say Yes and it
+ will be accessible from within Linux.
+ To compile this driver as a module, choose M here; the module
will be called tpm_infineon.
Further information on this driver and the supported hardware
can be found at http://www.prosec.rub.de/tpm
diff --git a/drivers/char/tpm/tpm_infineon.c b/drivers/char/tpm/tpm_infineon.c
index 0e3241645c1..dc8c540391f 100644
--- a/drivers/char/tpm/tpm_infineon.c
+++ b/drivers/char/tpm/tpm_infineon.c
@@ -1,7 +1,7 @@
/*
* Description:
* Device Driver for the Infineon Technologies
- * SLD 9630 TT Trusted Platform Module
+ * 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>
@@ -12,9 +12,10 @@
* modify it under the terms of the GNU General Public License as
* published by the Free Software Foundation, version 2 of the
* License.
- *
*/
+#include <acpi/acpi_bus.h>
+#include <linux/pnp.h>
#include "tpm.h"
/* Infineon specific definitions */
@@ -26,8 +27,11 @@
#define TPM_MSLEEP_TIME 3
/* gives number of max. msleep()-calls before throwing timeout */
#define TPM_MAX_TRIES 5000
-#define TCPA_INFINEON_DEV_VEN_VALUE 0x15D1
-#define TPM_DATA (TPM_ADDR + 1) & 0xff
+#define TPM_INFINEON_DEV_VEN_VALUE 0x15D1
+
+/* These values will be filled after ACPI-call */
+static int TPM_INF_DATA = 0;
+static int TPM_INF_ADDR = 0;
/* TPM header definitions */
enum infineon_tpm_header {
@@ -305,9 +309,10 @@ static int tpm_inf_send(struct tpm_chip *chip, u8 * buf, size_t count)
static void tpm_inf_cancel(struct tpm_chip *chip)
{
- /* Nothing yet!
- This has something to do with the internal functions
- of the TPM. Abort isn't really necessary...
+ /*
+ Since we are using the legacy mode to communicate
+ with the TPM, we have no cancel functions, but have
+ a workaround for interrupting the TPM through WTX.
*/
}
@@ -345,6 +350,32 @@ static struct tpm_vendor_specific tpm_inf = {
.miscdev = {.fops = &inf_ops,},
};
+static const struct pnp_device_id tpm_pnp_tbl[] = {
+ /* Infineon TPMs */
+ {"IFX0101", 0},
+ {"IFX0102", 0},
+ {"", 0}
+};
+
+static int __devinit tpm_inf_acpi_probe(struct pnp_dev *dev,
+ const struct pnp_device_id *dev_id)
+{
+ TPM_INF_ADDR = (pnp_port_start(dev, 0) & 0xff);
+ TPM_INF_DATA = ((TPM_INF_ADDR + 1) & 0xff);
+ tpm_inf.base = pnp_port_start(dev, 1);
+ dev_info(&dev->dev, "Found %s with ID %s\n",
+ dev->name, dev_id->id);
+ if (!((tpm_inf.base >> 8) & 0xff))
+ tpm_inf.base = 0;
+ return 0;
+}
+
+static struct pnp_driver tpm_inf_pnp = {
+ .name = "tpm_inf_pnp",
+ .id_table = tpm_pnp_tbl,
+ .probe = tpm_inf_acpi_probe,
+};
+
static int __devinit tpm_inf_probe(struct pci_dev *pci_dev,
const struct pci_device_id *pci_id)
{
@@ -353,64 +384,99 @@ static int __devinit tpm_inf_probe(struct pci_dev *pci_dev,
int vendorid[2];
int version[2];
int productid[2];
+ char chipname[20];
if (pci_enable_device(pci_dev))
return -EIO;
dev_info(&pci_dev->dev, "LPC-bus found at 0x%x\n", pci_id->device);
+ /* read IO-ports from ACPI */
+ pnp_register_driver(&tpm_inf_pnp);
+ pnp_unregister_driver(&tpm_inf_pnp);
+
+ /* Make sure, we have received valid config ports */
+ if (!TPM_INF_ADDR) {
+ pci_disable_device(pci_dev);
+ return -EIO;
+ }
+
/* query chip for its vendor, its version number a.s.o. */
- outb(ENABLE_REGISTER_PAIR, TPM_ADDR);
- outb(IDVENL, TPM_ADDR);
- vendorid[1] = inb(TPM_DATA);
- outb(IDVENH, TPM_ADDR);
- vendorid[0] = inb(TPM_DATA);
- outb(IDPDL, TPM_ADDR);
- productid[1] = inb(TPM_DATA);
- outb(IDPDH, TPM_ADDR);
- productid[0] = inb(TPM_DATA);
- outb(CHIP_ID1, TPM_ADDR);
- version[1] = inb(TPM_DATA);
- outb(CHIP_ID2, TPM_ADDR);
- version[0] = inb(TPM_DATA);
-
- if ((vendorid[0] << 8 | vendorid[1]) == (TCPA_INFINEON_DEV_VEN_VALUE)) {
-
- /* read IO-ports from TPM */
- outb(IOLIMH, TPM_ADDR);
- ioh = inb(TPM_DATA);
- outb(IOLIML, TPM_ADDR);
- iol = inb(TPM_DATA);
- tpm_inf.base = (ioh << 8) | iol;
+ 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);
+
+ switch ((productid[0] << 8) | productid[1]) {
+ case 6:
+ sprintf(chipname, " (SLD 9630 TT 1.1)");
+ break;
+ case 11:
+ sprintf(chipname, " (SLB 9635 TT 1.2)");
+ break;
+ default:
+ sprintf(chipname, " (unknown chip)");
+ break;
+ }
+ chipname[19] = 0;
+
+ if ((vendorid[0] << 8 | vendorid[1]) == (TPM_INFINEON_DEV_VEN_VALUE)) {
if (tpm_inf.base == 0) {
- dev_err(&pci_dev->dev, "No IO-ports set!\n");
+ dev_err(&pci_dev->dev, "No IO-ports found!\n");
pci_disable_device(pci_dev);
- return -ENODEV;
+ return -EIO;
+ }
+ /* 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);
+
+ /* 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);
+
+ if ((ioh << 8 | iol) != tpm_inf.base) {
+ dev_err(&pci_dev->dev,
+ "Could not set IO-ports to %04x\n",
+ tpm_inf.base);
+ pci_disable_device(pci_dev);
+ return -EIO;
}
/* activate register */
- outb(TPM_DAR, TPM_ADDR);
- outb(0x01, TPM_DATA);
- outb(DISABLE_REGISTER_PAIR, TPM_ADDR);
+ outb(TPM_DAR, TPM_INF_ADDR);
+ outb(0x01, TPM_INF_DATA);
+ outb(DISABLE_REGISTER_PAIR, TPM_INF_ADDR);
/* disable RESET, LP and IRQC */
outb(RESET_LP_IRQC_DISABLE, tpm_inf.base + CMD);
/* Finally, we're done, print some infos */
dev_info(&pci_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"
"%s\n",
+ TPM_INF_ADDR,
tpm_inf.base,
version[0], version[1],
vendorid[0], vendorid[1],
- productid[0], productid[1], ((productid[0] == 0)
- && (productid[1] ==
- 6)) ?
- " (SLD 9630 TT 1.1)" : "");
+ productid[0], productid[1], chipname);
rc = tpm_register_hardware(pci_dev, &tpm_inf);
if (rc < 0) {
@@ -462,6 +528,6 @@ module_init(init_inf);
module_exit(cleanup_inf);
MODULE_AUTHOR("Marcel Selhorst <selhorst@crypto.rub.de>");
-MODULE_DESCRIPTION("Driver for Infineon TPM SLD 9630 TT");
-MODULE_VERSION("1.4");
+MODULE_DESCRIPTION("Driver for Infineon TPM SLD 9630 TT 1.1 / SLB 9635 TT 1.2");
+MODULE_VERSION("1.5");
MODULE_LICENSE("GPL");
diff --git a/drivers/char/watchdog/i8xx_tco.c b/drivers/char/watchdog/i8xx_tco.c
index f975dab1ddf..a13395e2c37 100644
--- a/drivers/char/watchdog/i8xx_tco.c
+++ b/drivers/char/watchdog/i8xx_tco.c
@@ -1,5 +1,5 @@
/*
- * i8xx_tco 0.07: TCO timer driver for i8xx chipsets
+ * i8xx_tco: TCO timer driver for i8xx chipsets
*
* (c) Copyright 2000 kernel concepts <nils@kernelconcepts.de>, All Rights Reserved.
* http://www.kernelconcepts.de
@@ -63,6 +63,9 @@
* 20050128 Wim Van Sebroeck <wim@iguana.be>
* 0.07 Added support for the ICH4-M, ICH6, ICH6R, ICH6-M, ICH6W and ICH6RW
* chipsets. Also added support for the "undocumented" ICH7 chipset.
+ * 20050807 Wim Van Sebroeck <wim@iguana.be>
+ * 0.08 Make sure that the watchdog is only "armed" when started.
+ * (Kernel Bug 4251)
*/
/*
@@ -87,7 +90,7 @@
#include "i8xx_tco.h"
/* Module and version information */
-#define TCO_VERSION "0.07"
+#define TCO_VERSION "0.08"
#define TCO_MODULE_NAME "i8xx TCO timer"
#define TCO_DRIVER_NAME TCO_MODULE_NAME ", v" TCO_VERSION
#define PFX TCO_MODULE_NAME ": "
@@ -125,10 +128,18 @@ static int tco_timer_start (void)
unsigned char val;
spin_lock(&tco_lock);
+
+ /* disable chipset's NO_REBOOT bit */
+ pci_read_config_byte (i8xx_tco_pci, 0xd4, &val);
+ val &= 0xfd;
+ pci_write_config_byte (i8xx_tco_pci, 0xd4, val);
+
+ /* Bit 11: TCO Timer Halt -> 0 = The TCO timer is enabled to count */
val = inb (TCO1_CNT + 1);
val &= 0xf7;
outb (val, TCO1_CNT + 1);
val = inb (TCO1_CNT + 1);
+
spin_unlock(&tco_lock);
if (val & 0x08)
@@ -138,13 +149,20 @@ static int tco_timer_start (void)
static int tco_timer_stop (void)
{
- unsigned char val;
+ unsigned char val, val1;
spin_lock(&tco_lock);
+ /* Bit 11: TCO Timer Halt -> 1 = The TCO timer is disabled */
val = inb (TCO1_CNT + 1);
val |= 0x08;
outb (val, TCO1_CNT + 1);
val = inb (TCO1_CNT + 1);
+
+ /* Set the NO_REBOOT bit to prevent later reboots, just for sure */
+ pci_read_config_byte (i8xx_tco_pci, 0xd4, &val1);
+ val1 |= 0x02;
+ pci_write_config_byte (i8xx_tco_pci, 0xd4, val1);
+
spin_unlock(&tco_lock);
if ((val & 0x08) == 0)
@@ -155,6 +173,7 @@ static int tco_timer_stop (void)
static int tco_timer_keepalive (void)
{
spin_lock(&tco_lock);
+ /* Reload the timer by writing to the TCO Timer Reload register */
outb (0x01, TCO1_RLD);
spin_unlock(&tco_lock);
return 0;
@@ -417,9 +436,8 @@ static unsigned char __init i8xx_tco_getdevice (void)
printk (KERN_ERR PFX "failed to get TCOBASE address\n");
return 0;
}
- /*
- * Check chipset's NO_REBOOT bit
- */
+
+ /* Check chipset's NO_REBOOT bit */
pci_read_config_byte (i8xx_tco_pci, 0xd4, &val1);
if (val1 & 0x02) {
val1 &= 0xfd;
@@ -430,6 +448,10 @@ static unsigned char __init i8xx_tco_getdevice (void)
return 0; /* Cannot reset NO_REBOOT bit */
}
}
+ /* Disable reboots untill the watchdog starts */
+ val1 |= 0x02;
+ pci_write_config_byte (i8xx_tco_pci, 0xd4, val1);
+
/* Set the TCO_EN bit in SMI_EN register */
if (!request_region (SMI_EN + 1, 1, "i8xx TCO")) {
printk (KERN_ERR PFX "I/O address 0x%04x already in use\n",
@@ -505,17 +527,10 @@ out:
static void __exit watchdog_cleanup (void)
{
- u8 val;
-
/* Stop the timer before we leave */
if (!nowayout)
tco_timer_stop ();
- /* Set the NO_REBOOT bit to prevent later reboots, just for sure */
- pci_read_config_byte (i8xx_tco_pci, 0xd4, &val);
- val |= 0x02;
- pci_write_config_byte (i8xx_tco_pci, 0xd4, val);
-
/* Deregister */
misc_deregister (&i8xx_tco_miscdev);
unregister_reboot_notifier(&i8xx_tco_notifier);
diff --git a/drivers/char/watchdog/sa1100_wdt.c b/drivers/char/watchdog/sa1100_wdt.c
index 1b2132617dc..fb88b4041dc 100644
--- a/drivers/char/watchdog/sa1100_wdt.c
+++ b/drivers/char/watchdog/sa1100_wdt.c
@@ -36,13 +36,10 @@
#include <asm/uaccess.h>
#define OSCR_FREQ CLOCK_TICK_RATE
-#define SA1100_CLOSE_MAGIC (0x5afc4453)
static unsigned long sa1100wdt_users;
-static int expect_close;
static int pre_margin;
static int boot_status;
-static int nowayout = WATCHDOG_NOWAYOUT;
/*
* Allow only one person to hold it open
@@ -62,55 +59,33 @@ static int sa1100dog_open(struct inode *inode, struct file *file)
}
/*
- * Shut off the timer.
- * Lock it in if it's a module and we defined ...NOWAYOUT
- * Oddly, the watchdog can only be enabled, but we can turn off
- * the interrupt, which appears to prevent the watchdog timing out.
+ * The watchdog cannot be disabled.
+ *
+ * Previous comments suggested that turning off the interrupt by
+ * clearing OIER[E3] would prevent the watchdog timing out but this
+ * does not appear to be true (at least on the PXA255).
*/
static int sa1100dog_release(struct inode *inode, struct file *file)
{
- OSMR3 = OSCR + pre_margin;
-
- if (expect_close == SA1100_CLOSE_MAGIC) {
- OIER &= ~OIER_E3;
- } else {
- printk(KERN_CRIT "WATCHDOG: WDT device closed unexpectedly. WDT will not stop!\n");
- }
+ printk(KERN_CRIT "WATCHDOG: Device closed - timer will not stop\n");
clear_bit(1, &sa1100wdt_users);
- expect_close = 0;
return 0;
}
static ssize_t sa1100dog_write(struct file *file, const char *data, size_t len, loff_t *ppos)
{
- if (len) {
- if (!nowayout) {
- size_t i;
-
- expect_close = 0;
-
- for (i = 0; i != len; i++) {
- char c;
-
- if (get_user(c, data + i))
- return -EFAULT;
- if (c == 'V')
- expect_close = SA1100_CLOSE_MAGIC;
- }
- }
+ if (len)
/* Refresh OSMR3 timer. */
OSMR3 = OSCR + pre_margin;
- }
return len;
}
static struct watchdog_info ident = {
- .options = WDIOF_CARDRESET | WDIOF_MAGICCLOSE |
- WDIOF_SETTIMEOUT | WDIOF_KEEPALIVEPING,
- .identity = "SA1100 Watchdog",
+ .options = WDIOF_CARDRESET | WDIOF_SETTIMEOUT | WDIOF_KEEPALIVEPING,
+ .identity = "SA1100/PXA255 Watchdog",
};
static int sa1100dog_ioctl(struct inode *inode, struct file *file,
@@ -172,7 +147,7 @@ static struct file_operations sa1100dog_fops =
static struct miscdevice sa1100dog_miscdev =
{
.minor = WATCHDOG_MINOR,
- .name = "SA1100/PXA2xx watchdog",
+ .name = "watchdog",
.fops = &sa1100dog_fops,
};
@@ -194,7 +169,6 @@ static int __init sa1100dog_init(void)
if (ret == 0)
printk("SA1100/PXA2xx Watchdog Timer: timer margin %d sec\n",
margin);
-
return ret;
}
@@ -212,8 +186,5 @@ MODULE_DESCRIPTION("SA1100/PXA2xx Watchdog");
module_param(margin, int, 0);
MODULE_PARM_DESC(margin, "Watchdog margin in seconds (default 60s)");
-module_param(nowayout, int, 0);
-MODULE_PARM_DESC(nowayout, "Watchdog cannot be stopped once started");
-
MODULE_LICENSE("GPL");
MODULE_ALIAS_MISCDEV(WATCHDOG_MINOR);
generated by cgit v1.2.3 (git 2.25.1) at 2024-07-21 11:54:07 +0000