brcmfmac: support save&restore firmware feature

Save & restore is an advanced power saving feature,
supported only on selected devices.
SR operation is almost completely transparent to the driver.
Support for it is hardware and firmware dependent.
Reviewed-by: Hante Meuleman <meuleman@broadcom.com>
Reviewed-by: Arend van Spriel <arend@broadcom.com>
Reviewed-by: Pieter-Paul Giesberts <pieterpg@broadcom.com>
Reviewed-by: Franky (Zhenhui) Lin <frankyl@broadcom.com>
Signed-off-by: Piotr Haber <phaber@broadcom.com>
Signed-off-by: Arend van Spriel <arend@broadcom.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

drivers/net/wireless/brcm80211/brcmfmac/sdio_host.h

@@ -48,7 +48,11 @@
 #define SBSDIO_NUM_FUNCTION		3
 
 /* function 0 vendor specific CCCR registers */
-#define SDIO_CCCR_BRCM_SEPINT		0xf2
+#define SDIO_CCCR_BRCM_CARDCAP			0xf0
+#define SDIO_CCCR_BRCM_CARDCAP_CMD14_SUPPORT	0x02
+#define SDIO_CCCR_BRCM_CARDCAP_CMD14_EXT	0x04
+#define SDIO_CCCR_BRCM_CARDCAP_CMD_NODEC	0x08
+#define SDIO_CCCR_BRCM_SEPINT			0xf2
 
 #define  SDIO_SEPINT_MASK		0x01
 #define  SDIO_SEPINT_OE			0x02
@@ -97,9 +101,23 @@
 #define SBSDIO_FUNC1_RFRAMEBCLO		0x1001B
 /* Read Frame Byte Count High */
 #define SBSDIO_FUNC1_RFRAMEBCHI		0x1001C
+/* MesBusyCtl (rev 11) */
+#define SBSDIO_FUNC1_MESBUSYCTRL	0x1001D
+/* Sdio Core Rev 12 */
+#define SBSDIO_FUNC1_WAKEUPCTRL		0x1001E
+#define SBSDIO_FUNC1_WCTRL_ALPWAIT_MASK		0x1
+#define SBSDIO_FUNC1_WCTRL_ALPWAIT_SHIFT	0
+#define SBSDIO_FUNC1_WCTRL_HTWAIT_MASK		0x2
+#define SBSDIO_FUNC1_WCTRL_HTWAIT_SHIFT		1
+#define SBSDIO_FUNC1_SLEEPCSR		0x1001F
+#define SBSDIO_FUNC1_SLEEPCSR_KSO_MASK		0x1
+#define SBSDIO_FUNC1_SLEEPCSR_KSO_SHIFT		0
+#define SBSDIO_FUNC1_SLEEPCSR_KSO_EN		1
+#define SBSDIO_FUNC1_SLEEPCSR_DEVON_MASK	0x2
+#define SBSDIO_FUNC1_SLEEPCSR_DEVON_SHIFT	1
 
 #define SBSDIO_FUNC1_MISC_REG_START	0x10000	/* f1 misc register start */
-#define SBSDIO_FUNC1_MISC_REG_LIMIT	0x1001C	/* f1 misc register end */
+#define SBSDIO_FUNC1_MISC_REG_LIMIT	0x1001F	/* f1 misc register end */
 
 /* function 1 OCP space */
 

drivers/net/wireless/brcm80211/include/chipcommon.h

@@ -205,7 +205,7 @@ struct chipcregs {
 	u32 res_req_timer_sel;
 	u32 res_req_timer;
 	u32 res_req_mask;
-	u32 PAD;
+	u32 pmucapabilities_ext; /* 0x64c, pmurev >=15 */
 	u32 chipcontrol_addr;	/* 0x650 */
 	u32 chipcontrol_data;	/* 0x654 */
 	u32 regcontrol_addr;
@@ -214,7 +214,11 @@ struct chipcregs {
 	u32 pllcontrol_data;
 	u32 pmustrapopt;	/* 0x668, corerev >= 28 */
 	u32 pmu_xtalfreq;	/* 0x66C, pmurev >= 10 */
-	u32 PAD[100];
+	u32 retention_ctl;          /* 0x670, pmurev >= 15 */
+	u32 PAD[3];
+	u32 retention_grpidx;       /* 0x680 */
+	u32 retention_grpctl;       /* 0x684 */
+	u32 PAD[94];
 	u16 sromotp[768];
 };
 
@@ -276,6 +280,12 @@ struct chipcregs {
 #define PCAP5_VC_SHIFT	22
 #define PCAP5_CC_MASK	0xf8000000
 #define PCAP5_CC_SHIFT	27
+/* pmucapabilites_ext PMU rev >= 15 */
+#define PCAPEXT_SR_SUPPORTED_MASK	(1 << 1)
+/* retention_ctl PMU rev >= 15 */
+#define PMU_RCTL_MACPHY_DISABLE_MASK        (1 << 26)
+#define PMU_RCTL_LOGIC_DISABLE_MASK         (1 << 27)
+
 
 /*
 * Maximum delay for the PMU state transition in us.