diff mbox series

[v5,05/44] char: tpm: handle HAS_IOPORT dependencies

Message ID 20230522105049.1467313-6-schnelle@linux.ibm.com (mailing list archive)
State New, archived
Headers show
Series None | expand

Commit Message

Niklas Schnelle May 22, 2023, 10:50 a.m. UTC 
In a future patch HAS_IOPORT=n will result in inb()/outb() and friends
not being declared. We thus need to add this dependency and ifdef
sections of code using inb()/outb() as alternative access methods.

Co-developed-by: Arnd Bergmann <arnd@kernel.org>
Signed-off-by: Arnd Bergmann <arnd@kernel.org>
Signed-off-by: Niklas Schnelle <schnelle@linux.ibm.com>
---
 drivers/char/tpm/Kconfig        |  1 +
 drivers/char/tpm/tpm_infineon.c | 16 ++++++++++++----
 drivers/char/tpm/tpm_tis_core.c | 19 ++++++++-----------
 3 files changed, 21 insertions(+), 15 deletions(-)

Comments

Jarkko Sakkinen May 24, 2023, 1:09 a.m. UTC | #1 
On Mon, 2023-05-22 at 12:50 +0200, Niklas Schnelle wrote:
> In a future patch HAS_IOPORT=n will result in inb()/outb() and friends
> not being declared. We thus need to add this dependency and ifdef
> sections of code using inb()/outb() as alternative access methods.
> 
> Co-developed-by: Arnd Bergmann <arnd@kernel.org>
> Signed-off-by: Arnd Bergmann <arnd@kernel.org>
> Signed-off-by: Niklas Schnelle <schnelle@linux.ibm.com>

Reviewed-by: Jarkko Sakkinen <jarkko@kernel.org>

BR, Jarkko
Jarkko Sakkinen May 24, 2023, 3:13 a.m. UTC | #2 
On Mon May 22, 2023 at 1:50 PM EEST, Niklas Schnelle wrote:
> In a future patch HAS_IOPORT=n will result in inb()/outb() and friends
> not being declared. We thus need to add this dependency and ifdef
> sections of code using inb()/outb() as alternative access methods.
>
> Co-developed-by: Arnd Bergmann <arnd@kernel.org>
> Signed-off-by: Arnd Bergmann <arnd@kernel.org>
> Signed-off-by: Niklas Schnelle <schnelle@linux.ibm.com>
> ---
>  drivers/char/tpm/Kconfig        |  1 +
>  drivers/char/tpm/tpm_infineon.c | 16 ++++++++++++----
>  drivers/char/tpm/tpm_tis_core.c | 19 ++++++++-----------
>  3 files changed, 21 insertions(+), 15 deletions(-)
>
> diff --git a/drivers/char/tpm/Kconfig b/drivers/char/tpm/Kconfig
> index 927088b2c3d3..418c9ed59ffd 100644
> --- a/drivers/char/tpm/Kconfig
> +++ b/drivers/char/tpm/Kconfig
> @@ -149,6 +149,7 @@ config TCG_NSC
>  config TCG_ATMEL
>  	tristate "Atmel TPM Interface"
>  	depends on PPC64 || HAS_IOPORT_MAP
> +	depends on HAS_IOPORT
>  	help
>  	  If you have a TPM security chip from Atmel say Yes and it 
>  	  will be accessible from within Linux.  To compile this driver 
> diff --git a/drivers/char/tpm/tpm_infineon.c b/drivers/char/tpm/tpm_infineon.c
> index 9c924a1440a9..99c6e565ec8d 100644
> --- a/drivers/char/tpm/tpm_infineon.c
> +++ b/drivers/char/tpm/tpm_infineon.c
> @@ -26,7 +26,9 @@
>  #define	TPM_MAX_TRIES		5000
>  #define	TPM_INFINEON_DEV_VEN_VALUE	0x15D1
>  
> +#ifdef CONFIG_HAS_IOPORT
>  #define TPM_INF_IO_PORT		0x0
> +#endif
>  #define TPM_INF_IO_MEM		0x1
>  
>  #define TPM_INF_ADDR		0x0
> @@ -51,34 +53,40 @@ static struct tpm_inf_dev tpm_dev;
>  
>  static inline void tpm_data_out(unsigned char data, unsigned char offset)
>  {
> +#ifdef CONFIG_HAS_IOPORT
>  	if (tpm_dev.iotype == TPM_INF_IO_PORT)
>  		outb(data, tpm_dev.data_regs + offset);
>  	else
> +#endif
>  		writeb(data, tpm_dev.mem_base + tpm_dev.data_regs + offset);
>  }
>  
>  static inline unsigned char tpm_data_in(unsigned char offset)
>  {
> +#ifdef CONFIG_HAS_IOPORT
>  	if (tpm_dev.iotype == TPM_INF_IO_PORT)
>  		return inb(tpm_dev.data_regs + offset);
> -	else
> -		return readb(tpm_dev.mem_base + tpm_dev.data_regs + offset);
> +#endif
> +	return readb(tpm_dev.mem_base + tpm_dev.data_regs + offset);
>  }
>  
>  static inline void tpm_config_out(unsigned char data, unsigned char offset)
>  {
> +#ifdef CONFIG_HAS_IOPORT
>  	if (tpm_dev.iotype == TPM_INF_IO_PORT)
>  		outb(data, tpm_dev.config_port + offset);
>  	else
> +#endif
>  		writeb(data, tpm_dev.mem_base + tpm_dev.index_off + offset);
>  }
>  
>  static inline unsigned char tpm_config_in(unsigned char offset)
>  {
> +#ifdef CONFIG_HAS_IOPORT
>  	if (tpm_dev.iotype == TPM_INF_IO_PORT)
>  		return inb(tpm_dev.config_port + offset);
> -	else
> -		return readb(tpm_dev.mem_base + tpm_dev.index_off + offset);
> +#endif
> +	return readb(tpm_dev.mem_base + tpm_dev.index_off + offset);
>  }
>  
>  /* TPM header definitions */
> diff --git a/drivers/char/tpm/tpm_tis_core.c b/drivers/char/tpm/tpm_tis_core.c
> index 558144fa707a..0ee5a83e35a8 100644
> --- a/drivers/char/tpm/tpm_tis_core.c
> +++ b/drivers/char/tpm/tpm_tis_core.c
> @@ -954,11 +954,6 @@ static void tpm_tis_clkrun_enable(struct tpm_chip *chip, bool value)
>  		clkrun_val &= ~LPC_CLKRUN_EN;
>  		iowrite32(clkrun_val, data->ilb_base_addr + LPC_CNTRL_OFFSET);
>  
> -		/*
> -		 * Write any random value on port 0x80 which is on LPC, to make
> -		 * sure LPC clock is running before sending any TPM command.
> -		 */
> -		outb(0xCC, 0x80);
>  	} else {
>  		data->clkrun_enabled--;
>  		if (data->clkrun_enabled)
> @@ -969,13 +964,15 @@ static void tpm_tis_clkrun_enable(struct tpm_chip *chip, bool value)
>  		/* Enable LPC CLKRUN# */
>  		clkrun_val |= LPC_CLKRUN_EN;
>  		iowrite32(clkrun_val, data->ilb_base_addr + LPC_CNTRL_OFFSET);
> -
> -		/*
> -		 * Write any random value on port 0x80 which is on LPC, to make
> -		 * sure LPC clock is running before sending any TPM command.
> -		 */
> -		outb(0xCC, 0x80);
>  	}
> +
> +#ifdef CONFIG_HAS_IOPORT
> +	/*
> +	 * Write any random value on port 0x80 which is on LPC, to make
> +	 * sure LPC clock is running before sending any TPM command.
> +	 */
> +	outb(0xCC, 0x80);
> +#endif
>  }
>  
>  static const struct tpm_class_ops tpm_tis = {
> -- 
> 2.39.2

Acked-by: Jarkko Sakkinen <jarkko@kernel.org>

BR, Jarkko
diff mbox series

Patch

diff --git a/drivers/char/tpm/Kconfig b/drivers/char/tpm/Kconfig
index 927088b2c3d3..418c9ed59ffd 100644
--- a/drivers/char/tpm/Kconfig
+++ b/drivers/char/tpm/Kconfig
@@ -149,6 +149,7 @@  config TCG_NSC
 config TCG_ATMEL
 	tristate "Atmel TPM Interface"
 	depends on PPC64 || HAS_IOPORT_MAP
+	depends on HAS_IOPORT
 	help
 	  If you have a TPM security chip from Atmel say Yes and it 
 	  will be accessible from within Linux.  To compile this driver 
diff --git a/drivers/char/tpm/tpm_infineon.c b/drivers/char/tpm/tpm_infineon.c
index 9c924a1440a9..99c6e565ec8d 100644
--- a/drivers/char/tpm/tpm_infineon.c
+++ b/drivers/char/tpm/tpm_infineon.c
@@ -26,7 +26,9 @@ 
 #define	TPM_MAX_TRIES		5000
 #define	TPM_INFINEON_DEV_VEN_VALUE	0x15D1
 
+#ifdef CONFIG_HAS_IOPORT
 #define TPM_INF_IO_PORT		0x0
+#endif
 #define TPM_INF_IO_MEM		0x1
 
 #define TPM_INF_ADDR		0x0
@@ -51,34 +53,40 @@  static struct tpm_inf_dev tpm_dev;
 
 static inline void tpm_data_out(unsigned char data, unsigned char offset)
 {
+#ifdef CONFIG_HAS_IOPORT
 	if (tpm_dev.iotype == TPM_INF_IO_PORT)
 		outb(data, tpm_dev.data_regs + offset);
 	else
+#endif
 		writeb(data, tpm_dev.mem_base + tpm_dev.data_regs + offset);
 }
 
 static inline unsigned char tpm_data_in(unsigned char offset)
 {
+#ifdef CONFIG_HAS_IOPORT
 	if (tpm_dev.iotype == TPM_INF_IO_PORT)
 		return inb(tpm_dev.data_regs + offset);
-	else
-		return readb(tpm_dev.mem_base + tpm_dev.data_regs + offset);
+#endif
+	return readb(tpm_dev.mem_base + tpm_dev.data_regs + offset);
 }
 
 static inline void tpm_config_out(unsigned char data, unsigned char offset)
 {
+#ifdef CONFIG_HAS_IOPORT
 	if (tpm_dev.iotype == TPM_INF_IO_PORT)
 		outb(data, tpm_dev.config_port + offset);
 	else
+#endif
 		writeb(data, tpm_dev.mem_base + tpm_dev.index_off + offset);
 }
 
 static inline unsigned char tpm_config_in(unsigned char offset)
 {
+#ifdef CONFIG_HAS_IOPORT
 	if (tpm_dev.iotype == TPM_INF_IO_PORT)
 		return inb(tpm_dev.config_port + offset);
-	else
-		return readb(tpm_dev.mem_base + tpm_dev.index_off + offset);
+#endif
+	return readb(tpm_dev.mem_base + tpm_dev.index_off + offset);
 }
 
 /* TPM header definitions */
diff --git a/drivers/char/tpm/tpm_tis_core.c b/drivers/char/tpm/tpm_tis_core.c
index 558144fa707a..0ee5a83e35a8 100644
--- a/drivers/char/tpm/tpm_tis_core.c
+++ b/drivers/char/tpm/tpm_tis_core.c
@@ -954,11 +954,6 @@  static void tpm_tis_clkrun_enable(struct tpm_chip *chip, bool value)
 		clkrun_val &= ~LPC_CLKRUN_EN;
 		iowrite32(clkrun_val, data->ilb_base_addr + LPC_CNTRL_OFFSET);
 
-		/*
-		 * Write any random value on port 0x80 which is on LPC, to make
-		 * sure LPC clock is running before sending any TPM command.
-		 */
-		outb(0xCC, 0x80);
 	} else {
 		data->clkrun_enabled--;
 		if (data->clkrun_enabled)
@@ -969,13 +964,15 @@  static void tpm_tis_clkrun_enable(struct tpm_chip *chip, bool value)
 		/* Enable LPC CLKRUN# */
 		clkrun_val |= LPC_CLKRUN_EN;
 		iowrite32(clkrun_val, data->ilb_base_addr + LPC_CNTRL_OFFSET);
-
-		/*
-		 * Write any random value on port 0x80 which is on LPC, to make
-		 * sure LPC clock is running before sending any TPM command.
-		 */
-		outb(0xCC, 0x80);
 	}
+
+#ifdef CONFIG_HAS_IOPORT
+	/*
+	 * Write any random value on port 0x80 which is on LPC, to make
+	 * sure LPC clock is running before sending any TPM command.
+	 */
+	outb(0xCC, 0x80);
+#endif
 }
 
 static const struct tpm_class_ops tpm_tis = {