mt76: add mt76x02_dma_enable/mt76x02_dma_disable utility routines

Introduce mt76x02_dma_enable and mt76x02_dma_disable utility routines
in order to be reused in mt76x0 mac configuration and remove duplicated
code
Signed-off-by: Lorenzo Bianconi <lorenzo.bianconi@redhat.com>
Signed-off-by: Felix Fietkau <nbd@nbd.name>

drivers/net/wireless/mediatek/mt76/Makefile

@@ -16,7 +16,7 @@ CFLAGS_trace.o := -I$(src)
 CFLAGS_usb_trace.o := -I$(src)
 
 mt76x02-lib-y := mt76x02_util.o mt76x02_mac.o mt76x02_mcu.o \
-		 mt76x02_eeprom.o mt76x02_phy.o
+		 mt76x02_eeprom.o mt76x02_phy.o mt76x02_mmio.o
 
 mt76x02-usb-y := mt76x02_usb_mcu.o mt76x02_usb_core.o
 

drivers/net/wireless/mediatek/mt76/mt76x02_dma.h

@@ -67,4 +67,7 @@ mt76x02_wait_for_wpdma(struct mt76_dev *dev, int timeout)
 			   0, timeout);
 }
 
+void mt76x02_dma_enable(struct mt76_dev *dev);
+void mt76x02_dma_disable(struct mt76_dev *dev);
+
 #endif /* __MT76x02_DMA_H */

drivers/net/wireless/mediatek/mt76/mt76x02_mmio.c

+/*
+ * Copyright (C) 2016 Felix Fietkau <nbd@nbd.name>
+ * Copyright (C) 2018 Lorenzo Bianconi <lorenzo.bianconi83@gmail.com>
+ *
+ * Permission to use, copy, modify, and/or distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+ * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ */
+
+#include <linux/kernel.h>
+
+#include "mt76.h"
+#include "mt76x02_dma.h"
+#include "mt76x02_regs.h"
+
+void mt76x02_dma_enable(struct mt76_dev *dev)
+{
+	u32 val;
+
+	__mt76_wr(dev, MT_MAC_SYS_CTRL, MT_MAC_SYS_CTRL_ENABLE_TX);
+	mt76x02_wait_for_wpdma(dev, 1000);
+	usleep_range(50, 100);
+
+	val = FIELD_PREP(MT_WPDMA_GLO_CFG_DMA_BURST_SIZE, 3) |
+	      MT_WPDMA_GLO_CFG_TX_DMA_EN |
+	      MT_WPDMA_GLO_CFG_RX_DMA_EN;
+	__mt76_set(dev, MT_WPDMA_GLO_CFG, val);
+	__mt76_clear(dev, MT_WPDMA_GLO_CFG,
+		     MT_WPDMA_GLO_CFG_TX_WRITEBACK_DONE);
+}
+EXPORT_SYMBOL_GPL(mt76x02_dma_enable);
+
+void mt76x02_dma_disable(struct mt76_dev *dev)
+{
+	u32 val = __mt76_rr(dev, MT_WPDMA_GLO_CFG);
+
+	val &= MT_WPDMA_GLO_CFG_DMA_BURST_SIZE |
+	       MT_WPDMA_GLO_CFG_BIG_ENDIAN |
+	       MT_WPDMA_GLO_CFG_HDR_SEG_LEN;
+	val |= MT_WPDMA_GLO_CFG_TX_WRITEBACK_DONE;
+	__mt76_wr(dev, MT_WPDMA_GLO_CFG, val);
+}
+EXPORT_SYMBOL_GPL(mt76x02_dma_disable);

drivers/net/wireless/mediatek/mt76/mt76x2_init.c

@@ -206,16 +206,7 @@ int mt76x2_mac_start(struct mt76x2_dev *dev)
 
 	memset(dev->aggr_stats, 0, sizeof(dev->aggr_stats));
 
-	mt76_wr(dev, MT_MAC_SYS_CTRL, MT_MAC_SYS_CTRL_ENABLE_TX);
-	mt76x02_wait_for_wpdma(&dev->mt76, 1000);
-	usleep_range(50, 100);
-
-	mt76_set(dev, MT_WPDMA_GLO_CFG,
-		 MT_WPDMA_GLO_CFG_TX_DMA_EN |
-		 MT_WPDMA_GLO_CFG_RX_DMA_EN);
-
-	mt76_clear(dev, MT_WPDMA_GLO_CFG, MT_WPDMA_GLO_CFG_TX_WRITEBACK_DONE);
-
+	mt76x02_dma_enable(&dev->mt76);
 	mt76_wr(dev, MT_RX_FILTR_CFG, dev->mt76.rxfilter);
 
 	mt76_wr(dev, MT_MAC_SYS_CTRL,
@@ -354,20 +345,13 @@ int mt76x2_init_hardware(struct mt76x2_dev *dev)
 		0xc000,
 		0xc000,
 	};
-	u32 val;
 	int ret;
 
 	dev->beacon_offsets = beacon_offsets;
 	tasklet_init(&dev->pre_tbtt_tasklet, mt76x2_pre_tbtt_tasklet,
 		     (unsigned long) dev);
 
-	val = mt76_rr(dev, MT_WPDMA_GLO_CFG);
-	val &= MT_WPDMA_GLO_CFG_DMA_BURST_SIZE |
-	       MT_WPDMA_GLO_CFG_BIG_ENDIAN |
-	       MT_WPDMA_GLO_CFG_HDR_SEG_LEN;
-	val |= MT_WPDMA_GLO_CFG_TX_WRITEBACK_DONE;
-	mt76_wr(dev, MT_WPDMA_GLO_CFG, val);
-
+	mt76x02_dma_disable(&dev->mt76);
 	mt76x2_reset_wlan(dev, true);
 	mt76x2_power_on(dev);