linux-kernel - [PATCH v3 09/13] soc: mediatek: cmdq: add write

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Date:   Fri, 28 Feb 2020 21:44:17 +0800
From:   Dennis YC Hsieh <dennis-yc.hsieh@...iatek.com>
To:     Rob Herring <robh+dt@...nel.org>,
        Matthias Brugger <matthias.bgg@...il.com>,
        Jassi Brar <jassisinghbrar@...il.com>
CC:     <linux-kernel@...r.kernel.org>,
        <linux-mediatek@...ts.infradead.org>, <devicetree@...r.kernel.org>,
        <wsd_upstream@...iatek.com>,
        Bibby Hsieh <bibby.hsieh@...iatek.com>,
        CK Hu <ck.hu@...iatek.com>,
        Houlong Wei <houlong.wei@...iatek.com>,
        <linux-arm-kernel@...ts.infradead.org>,
        <srv_heupstream@...iatek.com>,
        Ming-Fan Chen <ming-fan.chen@...iatek.com>,
        Dennis YC Hsieh <dennis-yc.hsieh@...iatek.com>
Subject: [PATCH v3 09/13] soc: mediatek: cmdq: add write_s value function

add write_s function in cmdq helper functions which
writes a constant value to address with large dma
access support.

Signed-off-by: Dennis YC Hsieh <dennis-yc.hsieh@...iatek.com>
---
 drivers/soc/mediatek/mtk-cmdq-helper.c | 26 ++++++++++++++++++++++++++
 include/linux/soc/mediatek/mtk-cmdq.h  | 14 ++++++++++++++
 2 files changed, 40 insertions(+)

diff --git a/drivers/soc/mediatek/mtk-cmdq-helper.c b/drivers/soc/mediatek/mtk-cmdq-helper.c
index 428f99288ca6..1336523eb7d4 100644
--- a/drivers/soc/mediatek/mtk-cmdq-helper.c
+++ b/drivers/soc/mediatek/mtk-cmdq-helper.c
@@ -269,6 +269,32 @@ int cmdq_pkt_write_s(struct cmdq_pkt *pkt, u16 high_addr_reg_idx,
 }
 EXPORT_SYMBOL(cmdq_pkt_write_s);
 
+int cmdq_pkt_write_s_value(struct cmdq_pkt *pkt, u16 high_addr_reg_idx,
+			   u16 addr_low, u32 value, u32 mask)
+{
+	struct cmdq_instruction inst = { {0} };
+	int err;
+
+	if (mask != U32_MAX) {
+		inst.op = CMDQ_CODE_MASK;
+		inst.mask = ~mask;
+		err = cmdq_pkt_append_command(pkt, inst);
+		if (err < 0)
+			return err;
+
+		inst.op = CMDQ_CODE_WRITE_S_MASK;
+	} else {
+		inst.op = CMDQ_CODE_WRITE_S;
+	}
+
+	inst.sop = high_addr_reg_idx;
+	inst.offset = addr_low;
+	inst.value = value;
+
+	return cmdq_pkt_append_command(pkt, inst);
+}
+EXPORT_SYMBOL(cmdq_pkt_write_s_value);
+
 int cmdq_pkt_wfe(struct cmdq_pkt *pkt, u16 event)
 {
 	struct cmdq_instruction inst = { {0} };
diff --git a/include/linux/soc/mediatek/mtk-cmdq.h b/include/linux/soc/mediatek/mtk-cmdq.h
index 01b4184af310..fec292aac83c 100644
--- a/include/linux/soc/mediatek/mtk-cmdq.h
+++ b/include/linux/soc/mediatek/mtk-cmdq.h
@@ -135,6 +135,20 @@ int cmdq_pkt_read_s(struct cmdq_pkt *pkt, u16 high_addr_reg_idx, u16 addr_low,
 int cmdq_pkt_write_s(struct cmdq_pkt *pkt, u16 high_addr_reg_idx,
 		     u16 addr_low, u16 src_reg_idx, u32 mask);
 
+/**
+ * cmdq_pkt_write_s_value() - append write_s command with mask to the CMDQ
+ *			      packet which write value to a physical address
+ * @pkt:	the CMDQ packet
+ * @high_addr_reg_idx:	internal regisger ID which contains high address of pa
+ * @addr_low:	low address of pa
+ * @value:	the specified target value
+ * @mask:	the specified target mask
+ *
+ * Return: 0 for success; else the error code is returned
+ */
+int cmdq_pkt_write_s_value(struct cmdq_pkt *pkt, u16 high_addr_reg_idx,
+			   u16 addr_low, u32 value, u32 mask);
+
 /**
  * cmdq_pkt_wfe() - append wait for event command to the CMDQ packet
  * @pkt:	the CMDQ packet
-- 
2.18.0