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-rw-r--r--src/drivers/i2c/tpm/Kconfig5
-rw-r--r--src/drivers/i2c/tpm/cr50.c59
-rw-r--r--src/drivers/i2c/tpm/tpm.h1
3 files changed, 18 insertions, 47 deletions
diff --git a/src/drivers/i2c/tpm/Kconfig b/src/drivers/i2c/tpm/Kconfig
index 9e3a0aa82e..db6777e65d 100644
--- a/src/drivers/i2c/tpm/Kconfig
+++ b/src/drivers/i2c/tpm/Kconfig
@@ -44,11 +44,6 @@ config DRIVER_TPM_I2C_ADDR
default 0x2 # FIXME, workaround for Kconfig BS
depends on I2C_TPM
-config DRIVER_TPM_I2C_IRQ
- int "IRQ or GPE to use for TPM interrupt"
- default -1
- depends on I2C_TPM
-
config DRIVER_I2C_TPM_ACPI
depends on I2C_TPM
bool "Generate I2C TPM ACPI device"
diff --git a/src/drivers/i2c/tpm/cr50.c b/src/drivers/i2c/tpm/cr50.c
index ce30bf1b7c..aa59f1e917 100644
--- a/src/drivers/i2c/tpm/cr50.c
+++ b/src/drivers/i2c/tpm/cr50.c
@@ -42,10 +42,6 @@
#include <tpm.h>
#include "tpm.h"
-#if IS_ENABLED(CONFIG_ARCH_X86)
-#include <arch/acpi.h>
-#endif
-
#define CR50_MAX_BUFSIZE 63
#define CR50_TIMEOUT_LONG_MS 2000 /* Long timeout while waiting for TPM */
#define CR50_TIMEOUT_SHORT_MS 2 /* Short timeout during transactions */
@@ -61,33 +57,33 @@ struct tpm_inf_dev {
static struct tpm_inf_dev g_tpm_dev CAR_GLOBAL;
+__attribute__ ((weak)) int tis_plat_irq_status(void)
+{
+ static int warning_displayed CAR_GLOBAL;
+
+ if (!car_get_var(warning_displayed)) {
+ printk(BIOS_WARNING, "WARNING: tis_plat_irq_status() not implemented, wasting 20ms to wait on Cr50!\n");
+ car_set_var(warning_displayed, 1);
+ }
+ mdelay(CR50_TIMEOUT_NOIRQ_MS);
+
+ return 1;
+}
+
/* Wait for interrupt to indicate the TPM is ready */
static int cr50_i2c_wait_tpm_ready(struct tpm_chip *chip)
{
struct stopwatch sw;
- if (!chip->vendor.irq_status) {
- /* Fixed delay if interrupt not supported */
- mdelay(CR50_TIMEOUT_NOIRQ_MS);
- return 0;
- }
-
stopwatch_init_msecs_expire(&sw, CR50_TIMEOUT_IRQ_MS);
- while (!chip->vendor.irq_status(chip->vendor.irq))
+ while (!tis_plat_irq_status())
if (stopwatch_expired(&sw))
return -1;
return 0;
}
-/* Clear pending interrupts */
-static void cr50_i2c_clear_tpm_irq(struct tpm_chip *chip)
-{
- if (chip->vendor.irq_status)
- chip->vendor.irq_status(chip->vendor.irq);
-}
-
/*
* cr50_i2c_read() - read from TPM register
*
@@ -111,7 +107,7 @@ static int cr50_i2c_read(struct tpm_chip *chip, uint8_t addr,
return -1;
/* Clear interrupt before starting transaction */
- cr50_i2c_clear_tpm_irq(chip);
+ tis_plat_irq_status();
/* Send the register address byte to the TPM */
if (i2c_write_raw(tpm_dev->bus, tpm_dev->addr, &addr, 1)) {
@@ -161,7 +157,7 @@ static int cr50_i2c_write(struct tpm_chip *chip,
memcpy(tpm_dev->buf + 1, buffer, len);
/* Clear interrupt before starting transaction */
- cr50_i2c_clear_tpm_irq(chip);
+ tis_plat_irq_status();
/* Send write request buffer with address */
if (i2c_write_raw(tpm_dev->bus, tpm_dev->addr, tpm_dev->buf, len + 1)) {
@@ -418,25 +414,6 @@ static void cr50_vendor_init(struct tpm_chip *chip)
chip->vendor.recv = &cr50_i2c_tis_recv;
chip->vendor.send = &cr50_i2c_tis_send;
chip->vendor.cancel = &cr50_i2c_tis_ready;
- chip->vendor.irq = CONFIG_DRIVER_TPM_I2C_IRQ;
-
- /*
- * Interrupts are not supported this early in firmware,
- * use use an arch-specific method to query for interrupt status.
- */
- if (chip->vendor.irq > 0) {
-#if IS_ENABLED(CONFIG_ARCH_X86)
- /* Query GPE status for interrupt */
- chip->vendor.irq_status = &acpi_get_gpe;
-#else
- chip->vendor.irq = -1;
-#endif
- }
-
- if (chip->vendor.irq <= 0)
- printk(BIOS_WARNING,
- "%s: No IRQ, will use %ums delay for TPM ready\n",
- __func__, CR50_TIMEOUT_NOIRQ_MS);
}
int tpm_vendor_probe(unsigned int bus, uint32_t addr)
@@ -503,8 +480,8 @@ int tpm_vendor_init(struct tpm_chip *chip, unsigned int bus, uint32_t dev_addr)
goto out_err;
}
- printk(BIOS_DEBUG, "cr50 TPM 2.0 (i2c %u:0x%02x irq %d id 0x%x)\n",
- bus, dev_addr, chip->vendor.irq, vendor >> 16);
+ printk(BIOS_DEBUG, "cr50 TPM 2.0 (i2c %u:0x%02x id 0x%x)\n",
+ bus, dev_addr, vendor >> 16);
chip->is_open = 1;
return 0;
diff --git a/src/drivers/i2c/tpm/tpm.h b/src/drivers/i2c/tpm/tpm.h
index e511e0df22..35cf3972cf 100644
--- a/src/drivers/i2c/tpm/tpm.h
+++ b/src/drivers/i2c/tpm/tpm.h
@@ -59,7 +59,6 @@ struct tpm_vendor_specific {
uint8_t req_complete_val;
uint8_t req_canceled;
int irq;
- int (*irq_status)(int irq);
int (*recv)(struct tpm_chip *, uint8_t *, size_t);
int (*send)(struct tpm_chip *, uint8_t *, size_t);
void (*cancel)(struct tpm_chip *);