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From:   <Ajay.Kathat@microchip.com>
To:     <linux-wireless@vger.kernel.org>
CC:     <Claudiu.Beznea@microchip.com>, <Ajay.Kathat@microchip.com>
Subject: [PATCH v2 08/11] wilc1000: invoke chip reset register before firmware
 download
Thread-Topic: [PATCH v2 08/11] wilc1000: invoke chip reset register before
 firmware download
Thread-Index: AQHXqxrM6R4v6RJsvkKwKgX3Znnhxg==
Date:   Thu, 16 Sep 2021 16:49:21 +0000
Message-ID: <20210916164902.74629-9-ajay.kathat@microchip.com>
References: <20210916164902.74629-1-ajay.kathat@microchip.com>
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From: Ajay Singh <ajay.kathat@microchip.com>

Add the chip reset command to initialize the WILC chip before downloading
the firmware. Also, put the chip in wake-up mode so it is ready to receive
the firmware binary from the host.

Signed-off-by: Ajay Singh <ajay.kathat@microchip.com>
---
 .../net/wireless/microchip/wilc1000/wlan.c    | 22 ++++++++++++++++---
 1 file changed, 19 insertions(+), 3 deletions(-)

diff --git a/drivers/net/wireless/microchip/wilc1000/wlan.c b/drivers/net/w=
ireless/microchip/wilc1000/wlan.c
index f9256c1bad45..de5287cd8652 100644
--- a/drivers/net/wireless/microchip/wilc1000/wlan.c
+++ b/drivers/net/wireless/microchip/wilc1000/wlan.c
@@ -1080,6 +1080,7 @@ int wilc_wlan_firmware_download(struct wilc *wilc, co=
nst u8 *buffer,
 	u32 addr, size, size2, blksz;
 	u8 *dma_buffer;
 	int ret =3D 0;
+	u32 reg =3D 0;
=20
 	blksz =3D BIT(12);
=20
@@ -1088,10 +1089,22 @@ int wilc_wlan_firmware_download(struct wilc *wilc, =
const u8 *buffer,
 		return -EIO;
=20
 	offset =3D 0;
+	pr_debug("%s: Downloading firmware size =3D %d\n", __func__, buffer_size)=
;
+
+	acquire_bus(wilc, WILC_BUS_ACQUIRE_AND_WAKEUP);
+
+	wilc->hif_func->hif_read_reg(wilc, WILC_GLB_RESET_0, &reg);
+	reg &=3D ~BIT(10);
+	ret =3D wilc->hif_func->hif_write_reg(wilc, WILC_GLB_RESET_0, reg);
+	wilc->hif_func->hif_read_reg(wilc, WILC_GLB_RESET_0, &reg);
+	if (reg & BIT(10))
+		pr_err("%s: Failed to reset\n", __func__);
+
+	release_bus(wilc, WILC_BUS_RELEASE_ONLY);
 	do {
 		addr =3D get_unaligned_le32(&buffer[offset]);
 		size =3D get_unaligned_le32(&buffer[offset + 4]);
-		acquire_bus(wilc, WILC_BUS_ACQUIRE_ONLY);
+		acquire_bus(wilc, WILC_BUS_ACQUIRE_AND_WAKEUP);
 		offset +=3D 8;
 		while (((int)size) && (offset < buffer_size)) {
 			if (size <=3D blksz)
@@ -1109,10 +1122,13 @@ int wilc_wlan_firmware_download(struct wilc *wilc, =
const u8 *buffer,
 			offset +=3D size2;
 			size -=3D size2;
 		}
-		release_bus(wilc, WILC_BUS_RELEASE_ONLY);
+		release_bus(wilc, WILC_BUS_RELEASE_ALLOW_SLEEP);
=20
-		if (ret)
+		if (ret) {
+			pr_err("%s Bus error\n", __func__);
 			goto fail;
+		}
+		pr_debug("%s Offset =3D %d\n", __func__, offset);
 	} while (offset < buffer_size);
=20
 fail:
--=20
2.25.1