diff options
Diffstat (limited to 'drivers/tpm/tpm.c')
| -rw-r--r-- | drivers/tpm/tpm.c | 89 |
1 files changed, 77 insertions, 12 deletions
diff --git a/drivers/tpm/tpm.c b/drivers/tpm/tpm.c index 31761ec..a650892 100644 --- a/drivers/tpm/tpm.c +++ b/drivers/tpm/tpm.c @@ -34,6 +34,7 @@ #include <config.h> #include <common.h> +#include <dm.h> #include <linux/compiler.h> #include <fdtdec.h> #include <i2c.h> @@ -48,10 +49,14 @@ DECLARE_GLOBAL_DATA_PTR; /* TPM configuration */ struct tpm { +#ifdef CONFIG_DM_I2C + struct udevice *dev; +#else int i2c_bus; int slave_addr; - char inited; int old_bus; +#endif + char inited; } tpm; /* Global structure for tpm chip data */ @@ -372,7 +377,7 @@ static unsigned long tpm_calc_ordinal_duration(struct tpm_chip *chip, static ssize_t tpm_transmit(const unsigned char *buf, size_t bufsiz) { - ssize_t rc; + int rc; u32 count, ordinal; unsigned long start, stop; @@ -391,9 +396,11 @@ static ssize_t tpm_transmit(const unsigned char *buf, size_t bufsiz) return -E2BIG; } + debug("Calling send\n"); rc = chip->vendor.send(chip, (u8 *)buf, count); + debug(" ... done calling send\n"); if (rc < 0) { - error("tpm_transmit: tpm_send: error %zd\n", rc); + error("tpm_transmit: tpm_send: error %d\n", rc); goto out; } @@ -403,7 +410,7 @@ static ssize_t tpm_transmit(const unsigned char *buf, size_t bufsiz) start = get_timer(0); stop = tpm_calc_ordinal_duration(chip, ordinal); do { - debug("waiting for status...\n"); + debug("waiting for status... %ld %ld\n", start, stop); u8 status = chip->vendor.status(chip); if ((status & chip->vendor.req_complete_mask) == chip->vendor.req_complete_val) { @@ -428,15 +435,30 @@ out_recv: debug("out_recv: reading response...\n"); rc = chip->vendor.recv(chip, (u8 *)buf, TPM_BUFSIZE); if (rc < 0) - error("tpm_transmit: tpm_recv: error %zd\n", rc); + error("tpm_transmit: tpm_recv: error %d\n", rc); out: return rc; } +#ifdef CONFIG_DM_I2C +static int tpm_open_dev(struct udevice *dev) +{ + int rc; + + debug("%s: start\n", __func__); + if (g_chip.is_open) + return -EBUSY; + rc = tpm_vendor_init_dev(dev); + if (rc < 0) + g_chip.is_open = 0; + return rc; +} +#else static int tpm_open(uint32_t dev_addr) { int rc; + if (g_chip.is_open) return -EBUSY; rc = tpm_vendor_init(dev_addr); @@ -444,7 +466,7 @@ static int tpm_open(uint32_t dev_addr) g_chip.is_open = 0; return rc; } - +#endif static void tpm_close(void) { if (g_chip.is_open) { @@ -455,6 +477,7 @@ static void tpm_close(void) static int tpm_select(void) { +#ifndef CONFIG_DM_I2C int ret; tpm.old_bus = i2c_get_bus_num(); @@ -466,11 +489,13 @@ static int tpm_select(void) return -1; } } +#endif return 0; } static int tpm_deselect(void) { +#ifndef CONFIG_DM_I2C int ret; if (tpm.old_bus != i2c_get_bus_num()) { @@ -482,6 +507,7 @@ static int tpm_deselect(void) } } tpm.old_bus = -1; +#endif return 0; } @@ -493,10 +519,9 @@ static int tpm_deselect(void) */ static int tpm_decode_config(struct tpm *dev) { -#ifdef CONFIG_OF_CONTROL const void *blob = gd->fdt_blob; - int node, parent; - int i2c_bus; + int parent; + int node; node = fdtdec_next_compatible(blob, 0, COMPAT_INFINEON_SLB9635_TPM); if (node < 0) { @@ -512,15 +537,48 @@ static int tpm_decode_config(struct tpm *dev) debug("%s: Cannot find node parent\n", __func__); return -1; } +#ifdef CONFIG_DM_I2C + struct udevice *bus; + int chip_addr; + int ret; + + /* + * TODO(sjg@chromium.org): Remove this when driver model supports + * TPMs + */ + ret = uclass_get_device_by_of_offset(UCLASS_I2C, parent, &bus); + if (ret) { + debug("Cannot find bus for node '%s: ret=%d'\n", + fdt_get_name(blob, parent, NULL), ret); + return ret; + } + + chip_addr = fdtdec_get_int(blob, node, "reg", -1); + if (chip_addr == -1) { + debug("Cannot find reg property for node '%s: ret=%d'\n", + fdt_get_name(blob, node, NULL), ret); + return ret; + } + /* + * TODO(sjg@chromium.org): Older TPMs will need to use the older method + * in iic_tpm_read() so the offset length needs to be 0 here. + */ + ret = i2c_get_chip(bus, chip_addr, 1, &dev->dev); + if (ret) { + debug("Cannot find device for node '%s: ret=%d'\n", + fdt_get_name(blob, node, NULL), ret); + return ret; + } +#else + int i2c_bus; + i2c_bus = i2c_get_bus_num_fdt(parent); if (i2c_bus < 0) return -1; dev->i2c_bus = i2c_bus; dev->slave_addr = fdtdec_get_addr(blob, node, "reg"); -#else - dev->i2c_bus = CONFIG_TPM_TIS_I2C_BUS_NUMBER; - dev->slave_addr = CONFIG_TPM_TIS_I2C_SLAVE_ADDRESS; #endif + return 0; } @@ -547,6 +605,7 @@ int tis_init(void) if (tpm_select()) return -1; +#ifndef CONFIG_DM_I2C /* * Probe TPM twice; the first probing might fail because TPM is asleep, * and the probing can wake up TPM. @@ -556,8 +615,10 @@ int tis_init(void) tpm.slave_addr); return -1; } +#endif tpm_deselect(); + debug("%s: done\n", __func__); tpm.inited = 1; @@ -574,7 +635,11 @@ int tis_open(void) if (tpm_select()) return -1; +#ifdef CONFIG_DM_I2C + rc = tpm_open_dev(tpm.dev); +#else rc = tpm_open(tpm.slave_addr); +#endif tpm_deselect(); |