diff options
Diffstat (limited to 'drivers/char/tpm/tpm_nsc.c')
| -rw-r--r-- | drivers/char/tpm/tpm_nsc.c | 120 |
1 files changed, 68 insertions, 52 deletions
diff --git a/drivers/char/tpm/tpm_nsc.c b/drivers/char/tpm/tpm_nsc.c index 9cce833a0923..1a45e7dfc13b 100644 --- a/drivers/char/tpm/tpm_nsc.c +++ b/drivers/char/tpm/tpm_nsc.c @@ -22,43 +22,52 @@ #include "tpm.h" /* National definitions */ -#define TPM_NSC_BASE 0x360 -#define TPM_NSC_IRQ 0x07 +enum tpm_nsc_addr{ + TPM_NSC_BASE = 0x360, + TPM_NSC_IRQ = 0x07, + TPM_NSC_BASE0_HI = 0x60, + TPM_NSC_BASE0_LO = 0x61, + TPM_NSC_BASE1_HI = 0x62, + TPM_NSC_BASE1_LO = 0x63 +}; -#define NSC_LDN_INDEX 0x07 -#define NSC_SID_INDEX 0x20 -#define NSC_LDC_INDEX 0x30 -#define NSC_DIO_INDEX 0x60 -#define NSC_CIO_INDEX 0x62 -#define NSC_IRQ_INDEX 0x70 -#define NSC_ITS_INDEX 0x71 +enum tpm_nsc_index { + NSC_LDN_INDEX = 0x07, + NSC_SID_INDEX = 0x20, + NSC_LDC_INDEX = 0x30, + NSC_DIO_INDEX = 0x60, + NSC_CIO_INDEX = 0x62, + NSC_IRQ_INDEX = 0x70, + NSC_ITS_INDEX = 0x71 +}; -#define NSC_STATUS 0x01 -#define NSC_COMMAND 0x01 -#define NSC_DATA 0x00 +enum tpm_nsc_status_loc { + NSC_STATUS = 0x01, + NSC_COMMAND = 0x01, + NSC_DATA = 0x00 +}; /* status bits */ -#define NSC_STATUS_OBF 0x01 /* output buffer full */ -#define NSC_STATUS_IBF 0x02 /* input buffer full */ -#define NSC_STATUS_F0 0x04 /* F0 */ -#define NSC_STATUS_A2 0x08 /* A2 */ -#define NSC_STATUS_RDY 0x10 /* ready to receive command */ -#define NSC_STATUS_IBR 0x20 /* ready to receive data */ - +enum tpm_nsc_status { + NSC_STATUS_OBF = 0x01, /* output buffer full */ + NSC_STATUS_IBF = 0x02, /* input buffer full */ + NSC_STATUS_F0 = 0x04, /* F0 */ + NSC_STATUS_A2 = 0x08, /* A2 */ + NSC_STATUS_RDY = 0x10, /* ready to receive command */ + NSC_STATUS_IBR = 0x20 /* ready to receive data */ +}; /* command bits */ -#define NSC_COMMAND_NORMAL 0x01 /* normal mode */ -#define NSC_COMMAND_EOC 0x03 -#define NSC_COMMAND_CANCEL 0x22 - +enum tpm_nsc_cmd_mode { + NSC_COMMAND_NORMAL = 0x01, /* normal mode */ + NSC_COMMAND_EOC = 0x03, + NSC_COMMAND_CANCEL = 0x22 +}; /* * Wait for a certain status to appear */ static int wait_for_stat(struct tpm_chip *chip, u8 mask, u8 val, u8 * data) { - int expired = 0; - struct timer_list status_timer = - TIMER_INITIALIZER(tpm_time_expired, jiffies + 10 * HZ, - (unsigned long) &expired); + unsigned long stop; /* status immediately available check */ *data = inb(chip->vendor->base + NSC_STATUS); @@ -66,17 +75,14 @@ static int wait_for_stat(struct tpm_chip *chip, u8 mask, u8 val, u8 * data) return 0; /* wait for status */ - add_timer(&status_timer); + stop = jiffies + 10 * HZ; do { - set_current_state(TASK_UNINTERRUPTIBLE); - schedule_timeout(TPM_TIMEOUT); + msleep(TPM_TIMEOUT); *data = inb(chip->vendor->base + 1); - if ((*data & mask) == val) { - del_singleshot_timer_sync(&status_timer); + if ((*data & mask) == val) return 0; - } } - while (!expired); + while (time_before(jiffies, stop)); return -EBUSY; } @@ -84,10 +90,7 @@ static int wait_for_stat(struct tpm_chip *chip, u8 mask, u8 val, u8 * data) static int nsc_wait_for_ready(struct tpm_chip *chip) { int status; - int expired = 0; - struct timer_list status_timer = - TIMER_INITIALIZER(tpm_time_expired, jiffies + 100, - (unsigned long) &expired); + unsigned long stop; /* status immediately available check */ status = inb(chip->vendor->base + NSC_STATUS); @@ -97,19 +100,16 @@ static int nsc_wait_for_ready(struct tpm_chip *chip) return 0; /* wait for status */ - add_timer(&status_timer); + stop = jiffies + 100; do { - set_current_state(TASK_UNINTERRUPTIBLE); - schedule_timeout(TPM_TIMEOUT); + msleep(TPM_TIMEOUT); status = inb(chip->vendor->base + NSC_STATUS); if (status & NSC_STATUS_OBF) status = inb(chip->vendor->base + NSC_DATA); - if (status & NSC_STATUS_RDY) { - del_singleshot_timer_sync(&status_timer); + if (status & NSC_STATUS_RDY) return 0; - } } - while (!expired); + while (time_before(jiffies, stop)); dev_info(&chip->pci_dev->dev, "wait for ready failed\n"); return -EBUSY; @@ -228,30 +228,46 @@ static struct file_operations nsc_ops = { .release = tpm_release, }; +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 * nsc_attrs[] = { + &dev_attr_pubek.attr, + &dev_attr_pcrs.attr, + &dev_attr_caps.attr, + &dev_attr_cancel.attr, + 0, +}; + +static struct attribute_group nsc_attr_grp = { .attrs = nsc_attrs }; + static struct tpm_vendor_specific tpm_nsc = { .recv = tpm_nsc_recv, .send = tpm_nsc_send, .cancel = tpm_nsc_cancel, .req_complete_mask = NSC_STATUS_OBF, .req_complete_val = NSC_STATUS_OBF, - .base = TPM_NSC_BASE, + .req_canceled = NSC_STATUS_RDY, + .attr_group = &nsc_attr_grp, .miscdev = { .fops = &nsc_ops, }, - }; static int __devinit tpm_nsc_init(struct pci_dev *pci_dev, const struct pci_device_id *pci_id) { int rc = 0; + int lo, hi; + + hi = tpm_read_index(TPM_NSC_BASE0_HI); + lo = tpm_read_index(TPM_NSC_BASE0_LO); + + tpm_nsc.base = (hi<<8) | lo; if (pci_enable_device(pci_dev)) return -EIO; - if (tpm_lpc_bus_init(pci_dev, TPM_NSC_BASE)) { - rc = -ENODEV; - goto out_err; - } - /* verify that it is a National part (SID) */ if (tpm_read_index(NSC_SID_INDEX) != 0xEF) { rc = -ENODEV; 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