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dm: tpm: Convert the TPM command and library to driver model

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Add driver model support to the TPM command and the TPM library. Both
support only a single TPM at present.

Signed-off-by: Simon Glass <sjg@chromium.org>
Acked-by: Christophe Ricard<christophe-h.ricard@st.com>
Reviewed-by: Heiko Schocher <hs@denx.de>
This commit is contained in:
Simon Glass 2015-08-22 18:31:32 -06:00
parent f255d31f90
commit c8a8c51039
3 changed files with 53 additions and 6 deletions
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26
common/cmd_tpm.c
View file

@ -6,6 +6,7 @@
#include <common.h>
#include <command.h>
#include <dm.h>
#include <malloc.h>
#include <tpm.h>
#include <asm/unaligned.h>
@ -438,6 +439,21 @@ TPM_COMMAND_NO_ARG(tpm_force_clear)
TPM_COMMAND_NO_ARG(tpm_physical_enable)
TPM_COMMAND_NO_ARG(tpm_physical_disable)
#ifdef CONFIG_DM_TPM
static int get_tpm(struct udevice **devp)
{
int rc;
rc = uclass_first_device(UCLASS_TPM, devp);
if (rc) {
printf("Could not find TPM (ret=%d)\n", rc);
return CMD_RET_FAILURE;
}
return 0;
}
#endif
static int do_tpm_raw_transfer(cmd_tbl_t *cmdtp, int flag,
int argc, char * const argv[])
{
@ -452,7 +468,17 @@ static int do_tpm_raw_transfer(cmd_tbl_t *cmdtp, int flag,
return CMD_RET_FAILURE;
}
#ifdef CONFIG_DM_TPM
struct udevice *dev;
rc = get_tpm(&dev);
if (rc)
return rc;
rc = tpm_xfer(dev, command, count, response, &response_length);
#else
rc = tis_sendrecv(command, count, response, &response_length);
#endif
free(command);
if (!rc) {
puts("tpm response:\n");

2
include/tpm.h
View file

@ -349,7 +349,7 @@ int tpm_xfer(struct udevice *dev, const uint8_t *sendbuf, size_t send_size,
*
* @return 0 on success, non-0 on error.
*/
uint32_t tpm_init(void);
int tpm_init(void);
/**
* Issue a TPM_Startup command.

31
lib/tpm.c
View file

@ -6,10 +6,11 @@
*/
#include <common.h>
#include <stdarg.h>
#include <u-boot/sha1.h>
#include <dm.h>
#include <tis.h>
#include <tpm.h>
#include <asm/unaligned.h>
#include <u-boot/sha1.h>
/* Internal error of TPM command library */
#define TPM_LIB_ERROR ((uint32_t)~0u)
@ -240,9 +241,20 @@ static uint32_t tpm_sendrecv_command(const void *command,
response = response_buffer;
response_length = sizeof(response_buffer);
}
#ifdef CONFIG_DM_TPM
struct udevice *dev;
int ret;
ret = uclass_first_device(UCLASS_TPM, &dev);
if (ret)
return ret;
err = tpm_xfer(dev, command, tpm_command_size(command),
response, &response_length);
#else
err = tis_sendrecv(command, tpm_command_size(command),
response, &response_length);
if (err)
#endif
if (err < 0)
return TPM_LIB_ERROR;
if (size_ptr)
*size_ptr = response_length;
@ -250,15 +262,24 @@ static uint32_t tpm_sendrecv_command(const void *command,
return tpm_return_code(response);
}
uint32_t tpm_init(void)
int tpm_init(void)
{
uint32_t err;
int err;
#ifdef CONFIG_DM_TPM
struct udevice *dev;
err = uclass_first_device(UCLASS_TPM, &dev);
if (err)
return err;
return tpm_open(dev);
#else
err = tis_init();
if (err)
return err;
return tis_open();
#endif
}
uint32_t tpm_startup(enum tpm_startup_type mode)