Add helper to find out if the chip supports Save/Restore. Will be used

in the SDIO bus glue.

3 files changed, 57 insertions, 3 deletions

diff --git a/sys/dev/ic/bwfm.c b/sys/dev/ic/bwfm.c
index 0c7b7e371b3..8a52b3aa90d 100644
--- a/sys/dev/ic/bwfm.c
+++ b/sys/dev/ic/bwfm.c
@@ -1,4 +1,4 @@
-/* $OpenBSD: bwfm.c,v 1.36 2018/02/06 02:23:04 patrick Exp $ */
+/* $OpenBSD: bwfm.c,v 1.37 2018/02/07 21:36:34 patrick Exp $ */
 /*
  * Copyright (c) 2010-2016 Broadcom Corporation
  * Copyright (c) 2016,2017 Patrick Wildt <patrick@blueri.se>
@@ -1025,6 +1025,49 @@ bwfm_chip_cm3_set_passive(struct bwfm_softc *sc)
 	}
 }
 
+int
+bwfm_chip_sr_capable(struct bwfm_softc *sc)
+{
+	struct bwfm_core *core;
+	uint32_t reg;
+
+	if (sc->sc_chip.ch_pmurev < 17)
+		return 0;
+
+	core = bwfm_chip_get_core(sc, BWFM_AGENT_CORE_CHIPCOMMON);
+	switch (sc->sc_chip.ch_chip) {
+	case BRCM_CC_4354_CHIP_ID:
+	case BRCM_CC_4356_CHIP_ID:
+		sc->sc_buscore_ops->bc_write(sc, core->co_base +
+		    BWFM_CHIP_REG_CHIPCONTROL_ADDR, 3);
+		reg = sc->sc_buscore_ops->bc_read(sc, core->co_base +
+		    BWFM_CHIP_REG_CHIPCONTROL_DATA);
+		return (reg & (1 << 2)) != 0;
+	case BRCM_CC_43241_CHIP_ID:
+	case BRCM_CC_4335_CHIP_ID:
+	case BRCM_CC_4339_CHIP_ID:
+		sc->sc_buscore_ops->bc_write(sc, core->co_base +
+		    BWFM_CHIP_REG_CHIPCONTROL_ADDR, 3);
+		reg = sc->sc_buscore_ops->bc_read(sc, core->co_base +
+		    BWFM_CHIP_REG_CHIPCONTROL_DATA);
+		return reg != 0;
+	case BRCM_CC_43430_CHIP_ID:
+		reg = sc->sc_buscore_ops->bc_read(sc, core->co_base +
+		    BWFM_CHIP_REG_SR_CONTROL1);
+		return reg != 0;
+	default:
+		reg = sc->sc_buscore_ops->bc_read(sc, core->co_base +
+		    BWFM_CHIP_REG_PMUCAPABILITIES_EXT);
+		if ((reg & BWFM_CHIP_REG_PMUCAPABILITIES_SR_SUPP) == 0)
+			return 0;
+
+		reg = sc->sc_buscore_ops->bc_read(sc, core->co_base +
+		    BWFM_CHIP_REG_RETENTION_CTL);
+		return (reg & (BWFM_CHIP_REG_RETENTION_CTL_MACPHY_DIS |
+			       BWFM_CHIP_REG_RETENTION_CTL_LOGIC_DIS)) == 0;
+	}
+}
+
 /* RAM size helpers */
 void
 bwfm_chip_socram_ramsize(struct bwfm_softc *sc, struct bwfm_core *core)
diff --git a/sys/dev/ic/bwfmreg.h b/sys/dev/ic/bwfmreg.h
index f0ee714712f..3f04fe81a58 100644
--- a/sys/dev/ic/bwfmreg.h
+++ b/sys/dev/ic/bwfmreg.h
@@ -1,4 +1,4 @@
-/* $OpenBSD: bwfmreg.h,v 1.14 2018/01/11 19:33:34 patrick Exp $ */
+/* $OpenBSD: bwfmreg.h,v 1.15 2018/02/07 21:36:34 patrick Exp $ */
 /*
  * Copyright (c) 2010-2016 Broadcom Corporation
  * Copyright (c) 2016,2017 Patrick Wildt <patrick@blueri.se>
@@ -51,12 +51,22 @@
 #define  BWFM_CHIP_REG_CAPABILITIES_EXT_AOB_PRESENT	0x00000040
 #define BWFM_CHIP_REG_WATCHDOG			0x00000080
 #define BWFM_CHIP_REG_EROMPTR			0x000000FC
+#define BWFM_CHIP_REG_SR_CAPABILITY		0x00000500
+#define BWFM_CHIP_REG_SR_CONTROL0		0x00000504
+#define BWFM_CHIP_REG_SR_CONTROL1		0x00000508
 #define BWFM_CHIP_REG_PMUCONTROL		0x00000600
 #define  BWFM_CHIP_REG_PMUCONTROL_RES_MASK		0x00006000
 #define  BWFM_CHIP_REG_PMUCONTROL_RES_SHIFT		13
 #define  BWFM_CHIP_REG_PMUCONTROL_RES_RELOAD		0x2
 #define BWFM_CHIP_REG_PMUCAPABILITIES		0x00000604
 #define  BWFM_CHIP_REG_PMUCAPABILITIES_REV_MASK		0x000000ff
+#define BWFM_CHIP_REG_PMUCAPABILITIES_EXT	0x0000064C
+#define  BWFM_CHIP_REG_PMUCAPABILITIES_SR_SUPP		(1 << 1)
+#define BWFM_CHIP_REG_CHIPCONTROL_ADDR		0x00000650
+#define BWFM_CHIP_REG_CHIPCONTROL_DATA		0x00000654
+#define BWFM_CHIP_REG_RETENTION_CTL		0x00000670
+#define  BWFM_CHIP_REG_RETENTION_CTL_MACPHY_DIS		(1 << 26)
+#define  BWFM_CHIP_REG_RETENTION_CTL_LOGIC_DIS		(1 << 27)
 
 /* Agent registers */
 #define BWFM_AGENT_IOCTL			0x0408
diff --git a/sys/dev/ic/bwfmvar.h b/sys/dev/ic/bwfmvar.h
index 55669bb2b26..6ac4bd24a54 100644
--- a/sys/dev/ic/bwfmvar.h
+++ b/sys/dev/ic/bwfmvar.h
@@ -1,4 +1,4 @@
-/* $OpenBSD: bwfmvar.h,v 1.9 2018/02/05 10:30:04 patrick Exp $ */
+/* $OpenBSD: bwfmvar.h,v 1.10 2018/02/07 21:36:34 patrick Exp $ */
 /*
  * Copyright (c) 2010-2016 Broadcom Corporation
  * Copyright (c) 2016,2017 Patrick Wildt <patrick@blueri.se>
@@ -164,6 +164,7 @@ int bwfm_detach(struct bwfm_softc *, int);
 int bwfm_chip_attach(struct bwfm_softc *);
 int bwfm_chip_set_active(struct bwfm_softc *, uint32_t);
 void bwfm_chip_set_passive(struct bwfm_softc *);
+int bwfm_chip_sr_capable(struct bwfm_softc *);
 struct bwfm_core *bwfm_chip_get_core(struct bwfm_softc *, int);
 struct bwfm_core *bwfm_chip_get_pmu(struct bwfm_softc *);
 void bwfm_rx(struct bwfm_softc *, struct mbuf *);