diff options
Diffstat (limited to 'drivers/char/tpm/tpm.c')
-rw-r--r-- | drivers/char/tpm/tpm.c | 52 |
1 files changed, 35 insertions, 17 deletions
diff --git a/drivers/char/tpm/tpm.c b/drivers/char/tpm/tpm.c index c937ea2bcdb..7da4fe92127 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 +}; + +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 +}; -/* PCI configuration addresses */ -#define PCI_GEN_PMCON_1 0xA0 -#define PCI_GEN1_DEC 0xE4 -#define PCI_LPC_EN 0xE6 -#define PCI_GEN2_DEC 0xEC 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 @@ int tpm_lpc_bus_init(struct pci_dev *pci_dev, u16 base) 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 @@ void __devexit tpm_remove(struct pci_dev *pci_dev) 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 @@ int tpm_register_hardware(struct pci_dev *pci_dev, 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; } |