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>

1 files changed, 51 insertions, 0 deletions

diff --git a/drivers/net/wireless/mediatek/mt76/mt76x02_mmio.c b/drivers/net/wireless/mediatek/mt76/mt76x02_mmio.c
new file mode 100644
index 000000000000..f471c3a0674a
--- /dev/null
+++ b/drivers/net/wireless/mediatek/mt76/mt76x02_mmio.c
@@ -0,0 +1,51 @@
+/*
+ * 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);