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Date: Mon, 01 Feb 2010 12:14:27 +0100
From: Marcel Selhorst <m.selhorst@...rix.com>
To: Andrew Morton <akpm@...ux-foundation.org>
CC: OGAWA Hirofumi <hirofumi@...l.parknet.co.jp>,
"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
TPM Device Driver List <tpmdd-devel@...ts.sourceforge.net>
Subject: Re: [PATCH] tpm_infineon: Fix suspend/resume handler for pnp_driver
Hi,
> With review, it seems anybody doesn't call pnp_driver->driver.suspend/resume().
> (pnp_bus calls pnp_device->pnp_driver->suspend/resume())
after testing the patch, it seems that it is not working correctly.
When suspending, tpm_infineon calls the generic suspend function
of the TPM framework. However, the TPM framework does not return
and the system hangs upon suspend. When sending the necessary
command "TPM_SaveState" directly within the driver, suspending and
resuming works fine.
Please revert the patch "tpm_infineon-fix-suspend-resume-handler-for-pnp_driver.patch"
from Ogawa Hirofumi from 12/29/2009 and use the attached patch instead.
Best regards,
Marcel Selhorst
Signed-off-by: Marcel Selhorst <m.selhorst@...rix.com>
diff -pruN orig/drivers/char/tpm/tpm_infineon.c new/drivers/char/tpm/tpm_infineon.c
--- orig/drivers/char/tpm/tpm_infineon.c 2009-09-10 00:13:59.000000000 +0200
+++ new/drivers/char/tpm/tpm_infineon.c 2010-02-01 11:39:20.358002383 +0100
@@ -39,12 +39,12 @@
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 */
+ 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_regs; /* Data registers */
unsigned int data_size;
unsigned int config_port; /* IO Port config index reg */
@@ -406,14 +406,14 @@ static const struct tpm_vendor_specific
.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,
const struct pnp_device_id *dev_id)
@@ -430,7 +430,7 @@ static int __devinit tpm_inf_pnp_probe(s
if (pnp_port_valid(dev, 0) && pnp_port_valid(dev, 1) &&
!(pnp_port_flags(dev, 0) & IORESOURCE_DISABLED)) {
- tpm_dev.iotype = TPM_INF_IO_PORT;
+ 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);
@@ -459,9 +459,9 @@ static int __devinit tpm_inf_pnp_probe(s
goto err_last;
}
} else if (pnp_mem_valid(dev, 0) &&
- !(pnp_mem_flags(dev, 0) & IORESOURCE_DISABLED)) {
+ !(pnp_mem_flags(dev, 0) & IORESOURCE_DISABLED)) {
- tpm_dev.iotype = TPM_INF_IO_MEM;
+ 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);
@@ -563,11 +563,11 @@ static int __devinit tpm_inf_pnp_probe(s
"product id 0x%02x%02x"
"%s\n",
tpm_dev.iotype == TPM_INF_IO_PORT ?
- tpm_dev.config_port :
- tpm_dev.map_base + tpm_dev.index_off,
+ 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,
+ 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);
@@ -607,20 +607,55 @@ static __devexit void tpm_inf_pnp_remove
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 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 = __devexit_p(tpm_inf_pnp_remove),
+ .suspend = tpm_inf_pnp_suspend,
+ .resume = tpm_inf_pnp_resume,
+ .remove = __devexit_p(tpm_inf_pnp_remove)
};
static int __init init_inf(void)
@@ -638,5 +673,5 @@ module_exit(cleanup_inf);
MODULE_AUTHOR("Marcel Selhorst <m.selhorst@...rix.com>");
MODULE_DESCRIPTION("Driver for Infineon TPM SLD 9630 TT 1.1 / SLB 9635 TT 1.2");
-MODULE_VERSION("1.9");
+MODULE_VERSION("1.9.2");
MODULE_LICENSE("GPL");
--
Sirrix AG security technologies -- http://www.sirrix.com
Dipl.-Ing. Marcel Selhorst eMail: m.selhorst@...rix.com
Tel: +49 (234) 610071-126 Fax: +49 (234) 610071-526
Tel: +49 (681) 95986-126 Fax: +49 (681) 95986-526
Get my public key from keyserver, KeyId: 0x7C9821CC
Fingerprint 4138 E617 E62E 79D3 E663 BE5A 14E7 1CD8 7C98 21CC
Vorstand: Ammar Alkassar (Vors.), Christian Stueble
Vorsitzender des Aufsichtsrates: Prof. Dr. Kai Rannenberg
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