diff options
| author | Josh Boyer <jwboyer@linux.vnet.ibm.com> | 2008-09-04 04:03:45 +0000 |
|---|---|---|
| committer | Josh Boyer <jwboyer@linux.vnet.ibm.com> | 2008-09-30 09:23:04 -0400 |
| commit | ec4f9945b5b3e9e491a04eb1efe1c959371fa6de (patch) | |
| tree | af711173c68d0939ba85e581c63f83a4599f02ce | |
| parent | b68d185ab12b1fc8000432c5d5ab5404d4788b4c (diff) | |
ibm_newemac: Introduce mal_has_feature
There are some PowerPC SoCs that do odd things with the MAL handling. In
order to accommodate them, we need to introduce a feature mechanism that is
similar to the existing emac_has_feature function.
This adds a feature variable to the mal_instance structure, and adds a
mal_has_feature function. Two features are defined and are guarded
by Kconfig options that are selected by the affected platforms.
MAL_FTR_CLEAR_ICINSTAT is used for platforms that need to clear the
interrupt bits in the ICINTSTAT SDR for txeob/rxeob. This is common
on MAL implementations that have interrupt coalescing.
MAL_FTR_COMMON_ERR_INT is used for platforms that have SERR, TXDE,
and RXDE OR'd into a single interrupt bit.
Signed-off-by: Josh Boyer <jwboyer@linux.vnet.ibm.com>
Acked-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Acked-by: Jeff Garzik <jeff@garzik.org>
Signed-off-by: Josh Boyer <jwboyer@linux.vnet.ibm.com>
| -rw-r--r-- | drivers/net/ibm_newemac/Kconfig | 8 | ||||
| -rw-r--r-- | drivers/net/ibm_newemac/mal.h | 34 |
2 files changed, 42 insertions, 0 deletions
diff --git a/drivers/net/ibm_newemac/Kconfig b/drivers/net/ibm_newemac/Kconfig index dfb6547c37cb..44e5a0e9922a 100644 --- a/drivers/net/ibm_newemac/Kconfig +++ b/drivers/net/ibm_newemac/Kconfig @@ -66,3 +66,11 @@ config IBM_NEW_EMAC_EMAC4 config IBM_NEW_EMAC_NO_FLOW_CTRL bool default n + +config IBM_NEW_EMAC_MAL_CLR_ICINTSTAT + bool + default n + +config IBM_NEW_EMAC_MAL_COMMON_ERR + bool + default n diff --git a/drivers/net/ibm_newemac/mal.h b/drivers/net/ibm_newemac/mal.h index eaa7262dc079..0b2413839b78 100644 --- a/drivers/net/ibm_newemac/mal.h +++ b/drivers/net/ibm_newemac/mal.h @@ -213,6 +213,8 @@ struct mal_instance { struct of_device *ofdev; int index; spinlock_t lock; + + unsigned int features; }; static inline u32 get_mal_dcrn(struct mal_instance *mal, int reg) @@ -225,6 +227,38 @@ static inline void set_mal_dcrn(struct mal_instance *mal, int reg, u32 val) dcr_write(mal->dcr_host, reg, val); } +/* Features of various MAL implementations */ + +/* Set if you have interrupt coalescing and you have to clear the SDR + * register for TXEOB and RXEOB interrupts to work + */ +#define MAL_FTR_CLEAR_ICINTSTAT 0x00000001 + +/* Set if your MAL has SERR, TXDE, and RXDE OR'd into a single UIC + * interrupt + */ +#define MAL_FTR_COMMON_ERR_INT 0x00000002 + +enum { + MAL_FTRS_ALWAYS = 0, + + MAL_FTRS_POSSIBLE = +#ifdef CONFIG_IBM_NEW_EMAC_MAL_CLR_ICINTSTAT + MAL_FTR_CLEAR_ICINTSTAT | +#endif +#ifdef CONFIG_IBM_NEW_EMAC_MAL_COMMON_ERR + MAL_FTR_COMMON_ERR_INT | +#endif + 0, +}; + +static inline int mal_has_feature(struct mal_instance *dev, + unsigned long feature) +{ + return (MAL_FTRS_ALWAYS & feature) || + (MAL_FTRS_POSSIBLE & dev->features & feature); +} + /* Register MAL devices */ int mal_init(void); void mal_exit(void); |