brcmfmac: add support for CYW43012 SDIO chipset

CYW43012 is a 1x1 802.11a/b/g/n Dual-Band HT20, 256-QAM/Turbo QAM. It
is an Ultra Low Power WLAN+BT combo chip.
Reviewed-by: Arend van Spriel <arend.vanspriel@broadcom.com>
Signed-off-by: Chi-Hsien Lin <chi-hsien.lin@cypress.com>
Signed-off-by: Praveen Babu C <praveen.chandran@cypress.com>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>

drivers/net/wireless/broadcom/brcm80211/brcmfmac/bcmsdh.c

@@ -983,6 +983,7 @@ static const struct sdio_device_id brcmf_sdmmc_ids[] = {
 	BRCMF_SDIO_DEVICE(SDIO_DEVICE_ID_BROADCOM_4354),
 	BRCMF_SDIO_DEVICE(SDIO_DEVICE_ID_BROADCOM_4356),
 	BRCMF_SDIO_DEVICE(SDIO_DEVICE_ID_CYPRESS_4373),
+	BRCMF_SDIO_DEVICE(SDIO_DEVICE_ID_CYPRESS_43012),
 	{ /* end: all zeroes */ }
 };
 MODULE_DEVICE_TABLE(sdio, brcmf_sdmmc_ids);

drivers/net/wireless/broadcom/brcm80211/brcmfmac/chip.c

@@ -165,6 +165,7 @@ struct sbconfig {
 #define SRCI_LSS_MASK		0x00f00000
 #define SRCI_LSS_SHIFT		20
 #define	SRCI_SRNB_MASK		0xf0
+#define	SRCI_SRNB_MASK_EXT	0x100
 #define	SRCI_SRNB_SHIFT		4
 #define	SRCI_SRBSZ_MASK		0xf
 #define	SRCI_SRBSZ_SHIFT	0
@@ -592,7 +593,13 @@ static void brcmf_chip_socram_ramsize(struct brcmf_core_priv *sr, u32 *ramsize,
 		if (lss != 0)
 			*ramsize += (1 << ((lss - 1) + SR_BSZ_BASE));
 	} else {
-		nb = (coreinfo & SRCI_SRNB_MASK) >> SRCI_SRNB_SHIFT;
+		/* length of SRAM Banks increased for corerev greater than 23 */
+		if (sr->pub.rev >= 23) {
+			nb = (coreinfo & (SRCI_SRNB_MASK | SRCI_SRNB_MASK_EXT))
+				>> SRCI_SRNB_SHIFT;
+		} else {
+			nb = (coreinfo & SRCI_SRNB_MASK) >> SRCI_SRNB_SHIFT;
+		}
 		for (i = 0; i < nb; i++) {
 			retent = brcmf_chip_socram_banksize(sr, i, &banksize);
 			*ramsize += banksize;
@@ -1356,6 +1363,11 @@ bool brcmf_chip_sr_capable(struct brcmf_chip *pub)
 		addr = CORE_CC_REG(base, sr_control1);
 		reg = chip->ops->read32(chip->ctx, addr);
 		return reg != 0;
+	case CY_CC_43012_CHIP_ID:
+		addr = CORE_CC_REG(pmu->base, retention_ctl);
+		reg = chip->ops->read32(chip->ctx, addr);
+		return (reg & (PMU_RCTL_MACPHY_DISABLE_MASK |
+			       PMU_RCTL_LOGIC_DISABLE_MASK)) == 0;
 	default:
 		addr = CORE_CC_REG(pmu->base, pmucapabilities_ext);
 		reg = chip->ops->read32(chip->ctx, addr);

drivers/net/wireless/broadcom/brcm80211/brcmfmac/sdio.c

@@ -624,6 +624,7 @@ BRCMF_FW_DEF(43455, "brcmfmac43455-sdio");
 BRCMF_FW_DEF(4354, "brcmfmac4354-sdio");
 BRCMF_FW_DEF(4356, "brcmfmac4356-sdio");
 BRCMF_FW_DEF(4373, "brcmfmac4373-sdio");
+BRCMF_FW_DEF(43012, "brcmfmac43012-sdio");
 
 static const struct brcmf_firmware_mapping brcmf_sdio_fwnames[] = {
 	BRCMF_FW_ENTRY(BRCM_CC_43143_CHIP_ID, 0xFFFFFFFF, 43143),
@@ -643,7 +644,8 @@ static const struct brcmf_firmware_mapping brcmf_sdio_fwnames[] = {
 	BRCMF_FW_ENTRY(BRCM_CC_4345_CHIP_ID, 0xFFFFFFC0, 43455),
 	BRCMF_FW_ENTRY(BRCM_CC_4354_CHIP_ID, 0xFFFFFFFF, 4354),
 	BRCMF_FW_ENTRY(BRCM_CC_4356_CHIP_ID, 0xFFFFFFFF, 4356),
-	BRCMF_FW_ENTRY(CY_CC_4373_CHIP_ID, 0xFFFFFFFF, 4373)
+	BRCMF_FW_ENTRY(CY_CC_4373_CHIP_ID, 0xFFFFFFFF, 4373),
+	BRCMF_FW_ENTRY(CY_CC_43012_CHIP_ID, 0xFFFFFFFF, 43012)
 };
 
 static void pkt_align(struct sk_buff *p, int len, int align)
@@ -677,6 +679,14 @@ brcmf_sdio_kso_control(struct brcmf_sdio *bus, bool on)
 	/* 1st KSO write goes to AOS wake up core if device is asleep  */
 	brcmf_sdiod_writeb(bus->sdiodev, SBSDIO_FUNC1_SLEEPCSR, wr_val, &err);
 
+	/* In case of 43012 chip, the chip could go down immediately after
+	 * KSO bit is cleared. So the further reads of KSO register could
+	 * fail. Thereby just bailing out immediately after clearing KSO
+	 * bit, to avoid polling of KSO bit.
+	 */
+	if (!on && bus->ci->chip == CY_CC_43012_CHIP_ID)
+		return err;
+
 	if (on) {
 		/* device WAKEUP through KSO:
 		 * write bit 0 & read back until
@@ -2402,6 +2412,14 @@ static int brcmf_sdio_tx_ctrlframe(struct brcmf_sdio *bus, u8 *frame, u16 len)
 	return ret;
 }
 
+static bool brcmf_chip_is_ulp(struct brcmf_chip *ci)
+{
+	if (ci->chip == CY_CC_43012_CHIP_ID)
+		return true;
+	else
+		return false;
+}
+
 static void brcmf_sdio_bus_stop(struct device *dev)
 {
 	struct brcmf_bus *bus_if = dev_get_drvdata(dev);
@@ -2409,7 +2427,7 @@ static void brcmf_sdio_bus_stop(struct device *dev)
 	struct brcmf_sdio *bus = sdiodev->bus;
 	struct brcmf_core *core = bus->sdio_core;
 	u32 local_hostintmask;
-	u8 saveclk;
+	u8 saveclk, bpreq;
 	int err;
 
 	brcmf_dbg(TRACE, "Enter\n");
@@ -2436,9 +2454,14 @@ static void brcmf_sdio_bus_stop(struct device *dev)
 		/* Force backplane clocks to assure F2 interrupt propagates */
 		saveclk = brcmf_sdiod_readb(sdiodev, SBSDIO_FUNC1_CHIPCLKCSR,
 					    &err);
-		if (!err)
-			brcmf_sdiod_writeb(sdiodev, SBSDIO_FUNC1_CHIPCLKCSR,
-					   (saveclk | SBSDIO_FORCE_HT), &err);
+		if (!err) {
+			bpreq = saveclk;
+			bpreq |= brcmf_chip_is_ulp(bus->ci) ?
+				SBSDIO_HT_AVAIL_REQ : SBSDIO_FORCE_HT;
+			brcmf_sdiod_writeb(sdiodev,
+					   SBSDIO_FUNC1_CHIPCLKCSR,
+					   bpreq, &err);
+		}
 		if (err)
 			brcmf_err("Failed to force clock for F2: err %d\n",
 				  err);
@@ -3328,20 +3351,45 @@ static int brcmf_sdio_download_firmware(struct brcmf_sdio *bus,
 	return bcmerror;
 }
 
+static bool brcmf_sdio_aos_no_decode(struct brcmf_sdio *bus)
+{
+	if (bus->ci->chip == CY_CC_43012_CHIP_ID)
+		return true;
+	else
+		return false;
+}
+
 static void brcmf_sdio_sr_init(struct brcmf_sdio *bus)
 {
 	int err = 0;
 	u8 val;
+	u8 wakeupctrl;
+	u8 cardcap;
+	u8 chipclkcsr;
 
 	brcmf_dbg(TRACE, "Enter\n");
 
+	if (brcmf_chip_is_ulp(bus->ci)) {
+		wakeupctrl = SBSDIO_FUNC1_WCTRL_ALPWAIT_SHIFT;
+		chipclkcsr = SBSDIO_HT_AVAIL_REQ;
+	} else {
+		wakeupctrl = SBSDIO_FUNC1_WCTRL_HTWAIT_SHIFT;
+		chipclkcsr = SBSDIO_FORCE_HT;
+	}
+
+	if (brcmf_sdio_aos_no_decode(bus)) {
+		cardcap = SDIO_CCCR_BRCM_CARDCAP_CMD_NODEC;
+	} else {
+		cardcap = (SDIO_CCCR_BRCM_CARDCAP_CMD14_SUPPORT |
+			   SDIO_CCCR_BRCM_CARDCAP_CMD14_EXT);
+	}
+
 	val = brcmf_sdiod_readb(bus->sdiodev, SBSDIO_FUNC1_WAKEUPCTRL, &err);
 	if (err) {
 		brcmf_err("error reading SBSDIO_FUNC1_WAKEUPCTRL\n");
 		return;
 	}
-
-	val |= 1 << SBSDIO_FUNC1_WCTRL_HTWAIT_SHIFT;
+	val |= 1 << wakeupctrl;
 	brcmf_sdiod_writeb(bus->sdiodev, SBSDIO_FUNC1_WAKEUPCTRL, val, &err);
 	if (err) {
 		brcmf_err("error writing SBSDIO_FUNC1_WAKEUPCTRL\n");
@@ -3350,8 +3398,7 @@ static void brcmf_sdio_sr_init(struct brcmf_sdio *bus)
 
 	/* Add CMD14 Support */
 	brcmf_sdiod_func0_wb(bus->sdiodev, SDIO_CCCR_BRCM_CARDCAP,
-			     (SDIO_CCCR_BRCM_CARDCAP_CMD14_SUPPORT |
-			      SDIO_CCCR_BRCM_CARDCAP_CMD14_EXT),
+			     cardcap,
 			     &err);
 	if (err) {
 		brcmf_err("error writing SDIO_CCCR_BRCM_CARDCAP\n");
@@ -3359,7 +3406,7 @@ static void brcmf_sdio_sr_init(struct brcmf_sdio *bus)
 	}
 
 	brcmf_sdiod_writeb(bus->sdiodev, SBSDIO_FUNC1_CHIPCLKCSR,
-			   SBSDIO_FORCE_HT, &err);
+			   chipclkcsr, &err);
 	if (err) {
 		brcmf_err("error writing SBSDIO_FUNC1_CHIPCLKCSR\n");
 		return;
@@ -4051,7 +4098,7 @@ static void brcmf_sdio_firmware_callback(struct device *dev, int err,
 	const struct firmware *code;
 	void *nvram;
 	u32 nvram_len;
-	u8 saveclk;
+	u8 saveclk, bpreq;
 	u8 devctl;
 
 	brcmf_dbg(TRACE, "Enter: dev=%s, err=%d\n", dev_name(dev), err);
@@ -4085,8 +4132,11 @@ static void brcmf_sdio_firmware_callback(struct device *dev, int err,
 	/* Force clocks on backplane to be sure F2 interrupt propagates */
 	saveclk = brcmf_sdiod_readb(sdiod, SBSDIO_FUNC1_CHIPCLKCSR, &err);
 	if (!err) {
+		bpreq = saveclk;
+		bpreq |= brcmf_chip_is_ulp(bus->ci) ?
+			SBSDIO_HT_AVAIL_REQ : SBSDIO_FORCE_HT;
 		brcmf_sdiod_writeb(sdiod, SBSDIO_FUNC1_CHIPCLKCSR,
-				   (saveclk | SBSDIO_FORCE_HT), &err);
+				   bpreq, &err);
 	}
 	if (err) {
 		brcmf_err("Failed to force clock for F2: err %d\n", err);

drivers/net/wireless/broadcom/brcm80211/include/brcm_hw_ids.h

@@ -60,6 +60,7 @@
 #define BRCM_CC_43664_CHIP_ID		43664
 #define BRCM_CC_4371_CHIP_ID		0x4371
 #define CY_CC_4373_CHIP_ID		0x4373
+#define CY_CC_43012_CHIP_ID		43012
 
 /* USB Device IDs */
 #define BRCM_USB_43143_DEVICE_ID	0xbd1e

include/linux/mmc/sdio_ids.h

@@ -42,6 +42,7 @@
 #define SDIO_DEVICE_ID_BROADCOM_4354		0x4354
 #define SDIO_DEVICE_ID_BROADCOM_4356		0x4356
 #define SDIO_DEVICE_ID_CYPRESS_4373		0x4373
+#define SDIO_DEVICE_ID_CYPRESS_43012		43012
 
 #define SDIO_VENDOR_ID_INTEL			0x0089
 #define SDIO_DEVICE_ID_INTEL_IWMC3200WIMAX	0x1402