gianfar: Add WAKE_UCAST and "wake-on-filer" support

This enables eTSEC's filer (Rx parser) and the FGPI Rx
interrupt (Filer General Purpose Interrupt) as a wakeup
source event.

Upon entering suspend state, the eTSEC filer is given
a rule to match incoming L2 unicast packets.  A packet
matching the rule will be enqueued in the Rx ring and
a FGPI Rx interrupt will be asserted by the filer to
wakeup the system.  Other packet types will be dropped.
On resume the filer table is restored to the content
before entering suspend state.
The set of rules from gfar_filer_config_wol() could be
extended to implement other WoL capabilities as well.

The "fsl,wake-on-filer" DT binding enables this capability
on certain platforms that feature the necessary power
management infrastructure, targeting mainly printing and
imaging applications.
(refer to Power Management section of the SoC Ref Man)

Cc: Li Yang <leoli@freescale.com>
Cc: Zhao Chenhui <chenhui.zhao@freescale.com>

Signed-off-by: Claudiu Manoil <claudiu.manoil@freescale.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 10 insertions, 2 deletions

diff --git a/drivers/net/ethernet/freescale/gianfar.h b/drivers/net/ethernet/freescale/gianfar.h
index 8c1994856e93..f266b20f9ef5 100644
--- a/drivers/net/ethernet/freescale/gianfar.h
+++ b/drivers/net/ethernet/freescale/gianfar.h
@@ -340,6 +340,7 @@ extern const char gfar_driver_version[];
 #define IEVENT_MAG		0x00000800
 #define IEVENT_GRSC		0x00000100
 #define IEVENT_RXF0		0x00000080
+#define IEVENT_FGPI		0x00000010
 #define IEVENT_FIR		0x00000008
 #define IEVENT_FIQ		0x00000004
 #define IEVENT_DPE		0x00000002
@@ -372,6 +373,7 @@ extern const char gfar_driver_version[];
 #define IMASK_MAG		0x00000800
 #define IMASK_GRSC              0x00000100
 #define IMASK_RXFEN0		0x00000080
+#define IMASK_FGPI		0x00000010
 #define IMASK_FIR		0x00000008
 #define IMASK_FIQ		0x00000004
 #define IMASK_DPE		0x00000002
@@ -540,6 +542,9 @@ extern const char gfar_driver_version[];
 
 #define GFAR_INT_NAME_MAX	(IFNAMSIZ + 6)	/* '_g#_xx' */
 
+#define GFAR_WOL_MAGIC		0x00000001
+#define GFAR_WOL_FILER_UCAST	0x00000002
+
 struct txbd8
 {
 	union {
@@ -917,6 +922,7 @@ struct gfar {
 #define FSL_GIANFAR_DEV_HAS_BD_STASHING		0x00000200
 #define FSL_GIANFAR_DEV_HAS_BUF_STASHING	0x00000400
 #define FSL_GIANFAR_DEV_HAS_TIMER		0x00000800
+#define FSL_GIANFAR_DEV_HAS_WAKE_ON_FILER	0x00001000
 
 #if (MAXGROUPS == 2)
 #define DEFAULT_MAPPING 	0xAA
@@ -1161,8 +1167,6 @@ struct gfar_private {
 		extended_hash:1,
 		bd_stash_en:1,
 		rx_filer_enable:1,
-		/* Wake-on-LAN enabled */
-		wol_en:1,
 		/* Enable priorty based Tx scheduling in Hw */
 		prio_sched_en:1,
 		/* Flow control flags */
@@ -1191,6 +1195,10 @@ struct gfar_private {
 	u32 __iomem *hash_regs[16];
 	int hash_width;
 
+	/* wake-on-lan settings */
+	u16 wol_opts;
+	u16 wol_supported;
+
 	/*Filer table*/
 	unsigned int ftp_rqfpr[MAX_FILER_IDX + 1];
 	unsigned int ftp_rqfcr[MAX_FILER_IDX + 1];