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e1000e: Add Support for 38.4MHZ frequency 

Add support for 38.4MHz frequency is required for PTP
on CannonLake. SYSTIM frequency adjustment attributes for TIMINCA are
get/set dependent on the hardware clock frequency for a different
types of adapters. 38.4MHz frequency supported by CannonLake
and active once time synchronisation mechanism was enabled
Changed abbreviation from Hz to HZ to be compliant checkpatch code style

Signed-off-by: Sasha Neftin <sasha.neftin@intel.com>
Reviewed-by: Raanan Avargil <raanan.avargil@intel.com>
Reviewed-by: Dima Ruinskiy <dima.ruinskiy@intel.com>
Tested-by: Aaron Brown <aaron.f.brown@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
This commit is contained in:
Sasha Neftin 2017-04-06 10:27:03 +03:00 committed by Jeff Kirsher
parent c8744f44ae
commit 68fe1d5da5
2 changed files with 46 additions and 27 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

24
drivers/net/ethernet/intel/e1000e/e1000.h
View File

@ -379,18 +379,22 @@ s32 e1000e_get_base_timinca(struct e1000_adapter *adapter, u32 *timinca);
* INCVALUE_n into the TIMINCA register allowing 32+8+(24-INCVALUE_SHIFT_n)
* bits to count nanoseconds leaving the rest for fractional nonseconds.
*/
#define INCVALUE_96MHz 125
#define INCVALUE_SHIFT_96MHz 17
#define INCPERIOD_SHIFT_96MHz 2
#define INCPERIOD_96MHz (12 >> INCPERIOD_SHIFT_96MHz)
#define INCVALUE_96MHZ 125
#define INCVALUE_SHIFT_96MHZ 17
#define INCPERIOD_SHIFT_96MHZ 2
#define INCPERIOD_96MHZ (12 >> INCPERIOD_SHIFT_96MHZ)
#define INCVALUE_25MHz 40
#define INCVALUE_SHIFT_25MHz 18
#define INCPERIOD_25MHz 1
#define INCVALUE_25MHZ 40
#define INCVALUE_SHIFT_25MHZ 18
#define INCPERIOD_25MHZ 1
#define INCVALUE_24MHz 125
#define INCVALUE_SHIFT_24MHz 14
#define INCPERIOD_24MHz 3
#define INCVALUE_24MHZ 125
#define INCVALUE_SHIFT_24MHZ 14
#define INCPERIOD_24MHZ 3
#define INCVALUE_38400KHZ 26
#define INCVALUE_SHIFT_38400KHZ 19
#define INCPERIOD_38400KHZ 1
/* Another drawback of scaling the incvalue by a large factor is the
* 64-bit SYSTIM register overflows more quickly. This is dealt with

49
drivers/net/ethernet/intel/e1000e/netdev.c
View File

@ -3509,42 +3509,57 @@ s32 e1000e_get_base_timinca(struct e1000_adapter *adapter, u32 *timinca)
switch (hw->mac.type) {
case e1000_pch2lan:
/* Stable 96MHz frequency */
incperiod = INCPERIOD_96MHz;
incvalue = INCVALUE_96MHz;
shift = INCVALUE_SHIFT_96MHz;
adapter->cc.shift = shift + INCPERIOD_SHIFT_96MHz;
incperiod = INCPERIOD_96MHZ;
incvalue = INCVALUE_96MHZ;
shift = INCVALUE_SHIFT_96MHZ;
adapter->cc.shift = shift + INCPERIOD_SHIFT_96MHZ;
break;
case e1000_pch_lpt:
if (er32(TSYNCRXCTL) & E1000_TSYNCRXCTL_SYSCFI) {
/* Stable 96MHz frequency */
incperiod = INCPERIOD_96MHz;
incvalue = INCVALUE_96MHz;
shift = INCVALUE_SHIFT_96MHz;
adapter->cc.shift = shift + INCPERIOD_SHIFT_96MHz;
incperiod = INCPERIOD_96MHZ;
incvalue = INCVALUE_96MHZ;
shift = INCVALUE_SHIFT_96MHZ;
adapter->cc.shift = shift + INCPERIOD_SHIFT_96MHZ;
} else {
/* Stable 25MHz frequency */
incperiod = INCPERIOD_25MHz;
incvalue = INCVALUE_25MHz;
shift = INCVALUE_SHIFT_25MHz;
incperiod = INCPERIOD_25MHZ;
incvalue = INCVALUE_25MHZ;
shift = INCVALUE_SHIFT_25MHZ;
adapter->cc.shift = shift;
}
break;
case e1000_pch_spt:
if (er32(TSYNCRXCTL) & E1000_TSYNCRXCTL_SYSCFI) {
/* Stable 24MHz frequency */
incperiod = INCPERIOD_24MHz;
incvalue = INCVALUE_24MHz;
shift = INCVALUE_SHIFT_24MHz;
incperiod = INCPERIOD_24MHZ;
incvalue = INCVALUE_24MHZ;
shift = INCVALUE_SHIFT_24MHZ;
adapter->cc.shift = shift;
break;
}
return -EINVAL;
case e1000_pch_cnp:
if (er32(TSYNCRXCTL) & E1000_TSYNCRXCTL_SYSCFI) {
/* Stable 24MHz frequency */
incperiod = INCPERIOD_24MHZ;
incvalue = INCVALUE_24MHZ;
shift = INCVALUE_SHIFT_24MHZ;
adapter->cc.shift = shift;
} else {
/* Stable 38400KHz frequency */
incperiod = INCPERIOD_38400KHZ;
incvalue = INCVALUE_38400KHZ;
shift = INCVALUE_SHIFT_38400KHZ;
adapter->cc.shift = shift;
}
break;
case e1000_82574:
case e1000_82583:
/* Stable 25MHz frequency */
incperiod = INCPERIOD_25MHz;
incvalue = INCVALUE_25MHz;
shift = INCVALUE_SHIFT_25MHz;
incperiod = INCPERIOD_25MHZ;
incvalue = INCVALUE_25MHZ;
shift = INCVALUE_SHIFT_25MHZ;
adapter->cc.shift = shift;
break;
default: