wilc1000: modified recovery code to handle SPI bus error

For SPI command failure, the recovery handler was not working
for few scenario so added flow to clear 'is_init' flag to ensure
that WILC_SPI_PROTOCOL_OFFSET register is reconfigured.

Signed-off-by: Ajay Singh <ajay.kathat@microchip.com>

Author: ajaykathat

drivers/net/wireless/microchip/wilc1000/netdev.c

@@ -85,6 +85,14 @@ static int debug_thread(void *arg)
 				vif->restart = 1;
 			}
 		}
+
+		/* For Spi, clear 'is_init' flag so that protocol offset
+		 * register can be send to FW to setup required crc mode after
+		 * chip reset
+		 */
+		if (wl->io_type == WILC_HIF_SPI)
+			wl->hif_func->hif_clear_init(wl);
+
 		//TODO://Need to find way to call them in reverse
 		i = 0;
 		list_for_each_entry_rcu(vif, &wl->vif_list, list) {

drivers/net/wireless/microchip/wilc1000/sdio.c

@@ -260,6 +260,15 @@ static bool wilc_sdio_is_init(struct wilc *wilc)
 	return sdio_priv->is_init;
 }
 
+static int wilc_sdio_clear_init(struct wilc *wilc)
+{
+	struct wilc_sdio *sdio_priv = wilc->bus_data;
+
+	sdio_priv->is_init = false;
+
+	return 0;
+}
+
 static int wilc_sdio_suspend(struct device *dev)
 {
 	struct sdio_func *func = dev_to_sdio_func(dev);
@@ -1072,6 +1081,7 @@ static const struct wilc_hif_func wilc_hif_sdio = {
 	.disable_interrupt = wilc_sdio_disable_interrupt,
 	.hif_reset = wilc_sdio_reset,
 	.hif_is_init = wilc_sdio_is_init,
+	.hif_clear_init = wilc_sdio_clear_init,
 };
 
 static int wilc_sdio_resume(struct device *dev)

drivers/net/wireless/microchip/wilc1000/spi.c

@@ -1172,6 +1172,15 @@ static int wilc_spi_deinit(struct wilc *wilc)
 	return 0;
 }
 
+static int wilc_spi_clear_init(struct wilc *wilc)
+{
+	struct wilc_spi *spi_priv = wilc->bus_data;
+
+	spi_priv->is_init = false;
+
+	return 0;
+}
+
 static int wilc_spi_init(struct wilc *wilc, bool resume)
 {
 	struct spi_device *spi = to_spi_device(wilc->dev);
@@ -1394,4 +1403,5 @@ static const struct wilc_hif_func wilc_hif_spi = {
 	.hif_sync_ext = wilc_spi_sync_ext,
 	.hif_reset = wilc_spi_reset,
 	.hif_is_init = wilc_spi_is_init,
+	.hif_clear_init = wilc_spi_clear_init,
 };

drivers/net/wireless/microchip/wilc1000/wlan.h

@@ -418,6 +418,7 @@ struct wilc_hif_func {
 	void (*disable_interrupt)(struct wilc *nic);
 	int (*hif_reset)(struct wilc *wilc);
 	bool (*hif_is_init)(struct wilc *wilc);
+	int (*hif_clear_init)(struct wilc *wilc);
 };
 
 #define WILC_MAX_CFG_FRAME_SIZE		1468