[PATCH] tpm: Fix concerns with TPM driver -- use enums
Convert #defines to named enums where that preference has been indicated by
other kernel developers.
Signed-off-by: Kylene Hall <kjhall@us.ibm.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
diff --git a/drivers/char/tpm/tpm.c b/drivers/char/tpm/tpm.c
index c937ea2..7da4fe9 100644
--- a/drivers/char/tpm/tpm.c
+++ b/drivers/char/tpm/tpm.c
@@ -28,19 +28,35 @@
#include <linux/spinlock.h>
#include "tpm.h"
-#define TPM_MINOR 224 /* officially assigned */
+enum tpm_const {
+ TPM_MINOR = 224, /* officially assigned */
+ TPM_BUFSIZE = 2048,
+ TPM_NUM_DEVICES = 256,
+ TPM_NUM_MASK_ENTRIES = TPM_NUM_DEVICES / (8 * sizeof(int))
+};
-#define TPM_BUFSIZE 2048
+ /* PCI configuration addresses */
+enum tpm_pci_config_addr {
+ PCI_GEN_PMCON_1 = 0xA0,
+ PCI_GEN1_DEC = 0xE4,
+ PCI_LPC_EN = 0xE6,
+ PCI_GEN2_DEC = 0xEC
+};
-/* PCI configuration addresses */
-#define PCI_GEN_PMCON_1 0xA0
-#define PCI_GEN1_DEC 0xE4
-#define PCI_LPC_EN 0xE6
-#define PCI_GEN2_DEC 0xEC
+enum tpm_config {
+ TPM_LOCK_REG = 0x0D,
+ TPM_INTERUPT_REG = 0x0A,
+ TPM_BASE_ADDR_LO = 0x08,
+ TPM_BASE_ADDR_HI = 0x09,
+ TPM_UNLOCK_VALUE = 0x55,
+ TPM_LOCK_VALUE = 0xAA,
+ TPM_DISABLE_INTERUPT_VALUE = 0x00
+};
+
static LIST_HEAD(tpm_chip_list);
static DEFINE_SPINLOCK(driver_lock);
-static int dev_mask[32];
+static int dev_mask[TPM_NUM_MASK_ENTRIES];
static void user_reader_timeout(unsigned long ptr)
{
@@ -102,17 +118,18 @@
pci_write_config_dword(pci_dev, PCI_GEN_PMCON_1,
tmp);
}
- tpm_write_index(0x0D, 0x55); /* unlock 4F */
- tpm_write_index(0x0A, 0x00); /* int disable */
- tpm_write_index(0x08, base); /* base addr lo */
- tpm_write_index(0x09, (base & 0xFF00) >> 8); /* base addr hi */
- tpm_write_index(0x0D, 0xAA); /* lock 4F */
break;
case PCI_VENDOR_ID_AMD:
/* nothing yet */
break;
}
+ tpm_write_index(TPM_LOCK_REG, TPM_UNLOCK_VALUE);
+ tpm_write_index(TPM_INTERUPT_REG, TPM_DISABLE_INTERUPT_VALUE);
+ tpm_write_index(TPM_BASE_ADDR_LO, base);
+ tpm_write_index(TPM_BASE_ADDR_HI, (base & 0xFF00) >> 8);
+ tpm_write_index(TPM_LOCK_REG, TPM_LOCK_VALUE);
+
return 0;
}
@@ -527,7 +544,7 @@
pci_disable_device(pci_dev);
- dev_mask[chip->dev_num / 32] &= !(1 << (chip->dev_num % 32));
+ dev_mask[chip->dev_num / TPM_NUM_MASK_ENTRIES ] &= !(1 << (chip->dev_num % TPM_NUM_MASK_ENTRIES));
kfree(chip);
@@ -608,10 +625,11 @@
chip->dev_num = -1;
- for (i = 0; i < 32; i++)
- for (j = 0; j < 8; j++)
+ for (i = 0; i < TPM_NUM_MASK_ENTRIES; i++)
+ for (j = 0; j < 8 * sizeof(int); j++)
if ((dev_mask[i] & (1 << j)) == 0) {
- chip->dev_num = i * 32 + j;
+ chip->dev_num =
+ i * TPM_NUM_MASK_ENTRIES + j;
dev_mask[i] |= 1 << j;
goto dev_num_search_complete;
}