[U-Boot] [PATCH 19/25] dm: tpm: sandbox: Convert TPM driver to driver model

[christophe.ricard <christophe.ricard@gmail.com>]

Acked-by: Christophe Ricard <christophe-h.ricard@st.com>

On 11/08/2015 16:48, Simon Glass wrote:
> Convert the sandbox TPM driver to use driver model. Add it to the device
> tree so that it can be found on start-up.
>
> Signed-off-by: Simon Glass <sjg@chromium.org>
> ---
>
>   arch/sandbox/dts/sandbox.dts  |  4 ++++
>   configs/sandbox_defconfig     |  1 +
>   drivers/tpm/tpm_tis_sandbox.c | 48 ++++++++++++++++++++++++++++++++-----------
>   3 files changed, 41 insertions(+), 12 deletions(-)
>
> diff --git a/arch/sandbox/dts/sandbox.dts b/arch/sandbox/dts/sandbox.dts
> index 8927527..758c4a5 100644
> --- a/arch/sandbox/dts/sandbox.dts
> +++ b/arch/sandbox/dts/sandbox.dts
> @@ -156,6 +156,10 @@
>   		sides = <4>;
>   	};
>   
> +	tpm {
> +		compatible = "google,sandbox-tpm";
> +	};
> +
>   	triangle {
>   		compatible = "demo-shape";
>   		colour = "cyan";
> diff --git a/configs/sandbox_defconfig b/configs/sandbox_defconfig
> index b68d688..2600bf7 100644
> --- a/configs/sandbox_defconfig
> +++ b/configs/sandbox_defconfig
> @@ -31,6 +31,7 @@ CONFIG_CROS_EC_KEYB=y
>   CONFIG_LED=y
>   CONFIG_LED_GPIO=y
>   CONFIG_SANDBOX_SERIAL=y
> +CONFIG_DM_TPM=y
>   CONFIG_TPM_TIS_SANDBOX=y
>   CONFIG_SYS_I2C_SANDBOX=y
>   CONFIG_SANDBOX_SPI=y
> diff --git a/drivers/tpm/tpm_tis_sandbox.c b/drivers/tpm/tpm_tis_sandbox.c
> index ed4b039..7a481dd 100644
> --- a/drivers/tpm/tpm_tis_sandbox.c
> +++ b/drivers/tpm/tpm_tis_sandbox.c
> @@ -5,6 +5,8 @@
>    */
>   
>   #include <common.h>
> +#include <dm.h>
> +#include <tis.h>
>   #include <asm/state.h>
>   #include <asm/unaligned.h>
>   #include <linux/crc8.h>
> @@ -56,7 +58,7 @@ enum {
>    */
>   static struct tpm_state {
>   	uint8_t nvdata[NV_SEQ_COUNT][NV_DATA_SIZE];
> -} state;
> +} g_state;
>   
>   /**
>    * sandbox_tpm_read_state() - read the sandbox EC state from the state file
> @@ -82,7 +84,7 @@ static int sandbox_tpm_read_state(const void *blob, int node)
>   		sprintf(prop_name, "nvdata%d", i);
>   		prop = fdt_getprop(blob, node, prop_name, &len);
>   		if (prop && len == NV_DATA_SIZE)
> -			memcpy(state.nvdata[i], prop, NV_DATA_SIZE);
> +			memcpy(g_state.nvdata[i], prop, NV_DATA_SIZE);
>   	}
>   
>   	return 0;
> @@ -110,7 +112,7 @@ static int sandbox_tpm_write_state(void *blob, int node)
>   		char prop_name[20];
>   
>   		sprintf(prop_name, "nvdata%d", i);
> -		fdt_setprop(blob, node, prop_name, state.nvdata[i],
> +		fdt_setprop(blob, node, prop_name, g_state.nvdata[i],
>   			    NV_DATA_SIZE);
>   	}
>   
> @@ -135,10 +137,11 @@ static int index_to_seq(uint32_t index)
>   	return -1;
>   }
>   
> -int tis_sendrecv(const u8 *sendbuf, size_t send_size,
> -		 u8 *recvbuf, size_t *recv_len)
> +static int sandbox_tpm_xfer(struct udevice *dev, const uint8_t *sendbuf,
> +			    size_t send_size, uint8_t *recvbuf,
> +			    size_t *recv_len)
>   {
> -	struct tpm_state *tpm = &state;
> +	struct tpm_state *tpm = dev_get_priv(dev);
>   	uint32_t code, index, length, type;
>   	uint8_t *data;
>   	int seq;
> @@ -241,20 +244,41 @@ int tis_sendrecv(const u8 *sendbuf, size_t send_size,
>   	return 0;
>   }
>   
> -int tis_open(void)
> +static int sandbox_tpm_probe(struct udevice *dev)
>   {
> -	printf("%s\n", __func__);
> +	struct tpm_state *tpm = dev_get_priv(dev);
> +
> +	memcpy(tpm, &g_state, sizeof(*tpm));
> +
>   	return 0;
>   }
>   
> -int tis_close(void)
> +static int sandbox_tpm_open(struct udevice *dev)
>   {
> -	printf("%s\n", __func__);
>   	return 0;
>   }
>   
> -int tis_init(void)
> +static int sandbox_tpm_close(struct udevice *dev)
>   {
> -	printf("%s\n", __func__);
>   	return 0;
>   }
> +
> +static const struct tpm_ops sandbox_tpm_ops = {
> +	.open		= sandbox_tpm_open,
> +	.close		= sandbox_tpm_close,
> +	.xfer		= sandbox_tpm_xfer,
> +};
> +
> +static const struct udevice_id sandbox_tpm_ids[] = {
> +	{ .compatible = "google,sandbox-tpm" },
> +	{ }
> +};
> +
> +U_BOOT_DRIVER(sandbox_tpm) = {
> +	.name   = "sandbox_tpm",
> +	.id     = UCLASS_TPM,
> +	.of_match = sandbox_tpm_ids,
> +	.ops    = &sandbox_tpm_ops,
> +	.probe	= sandbox_tpm_probe,
> +	.priv_auto_alloc_size = sizeof(struct tpm_state),
> +};