From d4c477ca5448f19afaaf6c0cfd655009ea9e614d Mon Sep 17 00:00:00 2001 From: Brent Casavant Date: Tue, 21 Jun 2005 17:16:01 -0700 Subject: [PATCH] ioc4: PCI bus speed detection Several hardware features of SGI's IOC4 I/O controller chip require timing-related driver calculations dependent upon the PCI bus speed. This patch enables the core IOC4 driver code to detect the actual bus speed and store a value that can later be used by the IOC4 subdrivers as needed. Signed-off-by: Brent Casavant Acked-by: Pat Gefre Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- include/linux/ioc4.h | 37 ++++++++++++++++++++++++++++++------- 1 file changed, 30 insertions(+), 7 deletions(-) (limited to 'include/linux') diff --git a/include/linux/ioc4.h b/include/linux/ioc4.h index 729bfa4c4ac5..3dd18b785ebd 100644 --- a/include/linux/ioc4.h +++ b/include/linux/ioc4.h @@ -11,6 +11,14 @@ #include +/*************** + * Definitions * + ***************/ + +/* Miscellaneous values inherent to hardware */ + +#define IOC4_EXTINT_COUNT_DIVISOR 520 /* PCI clocks per COUNT tick */ + /*********************************** * Structures needed by subdrivers * ***********************************/ @@ -119,19 +127,34 @@ struct ioc4_misc_regs { } gppr[8]; /* Generic PIO pins */ }; -/* One of these per IOC4 - * - * The idd_serial_data field is present here, even though it's used - * solely by the serial subdriver, because the main IOC4 module - * properly owns pci_{get,set}_drvdata functionality. This field - * allows that subdriver to stash its own drvdata somewhere. - */ +/* Masks for GPCR DIR pins */ +#define IOC4_GPCR_DIR_0 0x01 /* External interrupt output */ +#define IOC4_GPCR_DIR_1 0x02 /* External interrupt input */ +#define IOC4_GPCR_DIR_2 0x04 +#define IOC4_GPCR_DIR_3 0x08 /* Keyboard/mouse presence */ +#define IOC4_GPCR_DIR_4 0x10 /* Ser. port 0 xcvr select (0=232, 1=422) */ +#define IOC4_GPCR_DIR_5 0x20 /* Ser. port 1 xcvr select (0=232, 1=422) */ +#define IOC4_GPCR_DIR_6 0x40 /* Ser. port 2 xcvr select (0=232, 1=422) */ +#define IOC4_GPCR_DIR_7 0x80 /* Ser. port 3 xcvr select (0=232, 1=422) */ + +/* Masks for GPCR EDGE pins */ +#define IOC4_GPCR_EDGE_0 0x01 +#define IOC4_GPCR_EDGE_1 0x02 /* External interrupt input */ +#define IOC4_GPCR_EDGE_2 0x04 +#define IOC4_GPCR_EDGE_3 0x08 +#define IOC4_GPCR_EDGE_4 0x10 +#define IOC4_GPCR_EDGE_5 0x20 +#define IOC4_GPCR_EDGE_6 0x40 +#define IOC4_GPCR_EDGE_7 0x80 + +/* One of these per IOC4 */ struct ioc4_driver_data { struct list_head idd_list; unsigned long idd_bar0; struct pci_dev *idd_pdev; const struct pci_device_id *idd_pci_id; struct __iomem ioc4_misc_regs *idd_misc_regs; + unsigned long count_period; void *idd_serial_data; }; -- cgit v1.2.3-59-g8ed1b