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tpm: tpm_tis_lpc: Add support for AT97SC3204 

The Atmel AT97SC3204 is also TIS compliant.
Modify the tpm_tis_lpc driver to check for the vid/did used by the
Atmel AT97SC3204 and report an appropriate description.

Signed-off-by: George McCollister <george.mccollister@gmail.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
This commit is contained in:
George McCollister 2016-10-17 09:24:32 -05:00 committed by Simon Glass
parent 0427b9c525
commit a982b6f514
1 changed files with 28 additions and 9 deletions
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37
drivers/tpm/tpm_tis_lpc.c
View File

@ -21,6 +21,21 @@
#define PREFIX "lpc_tpm: "
enum i2c_chip_type {
SLB9635,
AT97SC3204,
};
static const char * const chip_name[] = {
[SLB9635] = "Infineon SLB9635 TT 1.2",
[AT97SC3204] = "Atmel AT97SC3204",
};
static const u32 chip_didvid[] = {
[SLB9635] = 0xb15d1,
[AT97SC3204] = 0x32041114,
};
struct tpm_locality {
u32 access;
u8 padding0[4];
@ -146,9 +161,9 @@ static int tis_wait_reg(struct tpm_tis_lpc_priv *priv, u32 *reg, u8 mask,
static int tpm_tis_lpc_probe(struct udevice *dev)
{
struct tpm_tis_lpc_priv *priv = dev_get_priv(dev);
u32 vid, did;
fdt_addr_t addr;
u32 didvid;
ulong chip_type = dev_get_driver_data(dev);
addr = dev_get_addr(dev);
if (addr == FDT_ADDR_T_NONE)
@ -156,14 +171,15 @@ static int tpm_tis_lpc_probe(struct udevice *dev)
priv->regs = map_sysmem(addr, 0);
didvid = tpm_read_word(priv, &priv->regs[0].did_vid);
vid = didvid & 0xffff;
did = (didvid >> 16) & 0xffff;
if (vid != 0x15d1 || did != 0xb) {
if (didvid != chip_didvid[chip_type]) {
u32 vid, did;
vid = didvid & 0xffff;
did = (didvid >> 16) & 0xffff;
debug("Invalid vendor/device ID %04x/%04x\n", vid, did);
return -ENOSYS;
return -ENODEV;
}
debug("Found TPM %s by %s\n", "SLB9635 TT 1.2", "Infineon");
debug("Found TPM: %s\n", chip_name[chip_type]);
return 0;
}
@ -421,11 +437,13 @@ static int tpm_tis_lpc_close(struct udevice *dev)
static int tpm_tis_get_desc(struct udevice *dev, char *buf, int size)
{
ulong chip_type = dev_get_driver_data(dev);
if (size < 50)
return -ENOSPC;
return snprintf(buf, size, "1.2 TPM (vendor %s, chip %s)",
"Infineon", "SLB9635 TT 1.2");
return snprintf(buf, size, "1.2 TPM (%s)",
chip_name[chip_type]);
}
@ -438,7 +456,8 @@ static const struct tpm_ops tpm_tis_lpc_ops = {
};
static const struct udevice_id tpm_tis_lpc_ids[] = {
{ .compatible = "infineon,slb9635lpc" },
{ .compatible = "infineon,slb9635lpc", .data = SLB9635 },
{ .compatible = "atmel,at97sc3204", .data = AT97SC3204 },
{ }
};