linux-kernel - [PATCH v2 10/14] soc: mediatek: cmdq: add write

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Message-ID: <1574819937-6246-12-git-send-email-dennis-yc.hsieh@mediatek.com>
Date:   Wed, 27 Nov 2019 09:58:53 +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>,
        Dennis YC Hsieh <dennis-yc.hsieh@...iatek.com>
Subject: [PATCH v2 10/14] 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 | 31 ++++++++++++++++++++++++++
 include/linux/soc/mediatek/mtk-cmdq.h  | 12 ++++++++++
 2 files changed, 43 insertions(+)

diff --git a/drivers/soc/mediatek/mtk-cmdq-helper.c b/drivers/soc/mediatek/mtk-cmdq-helper.c
index 2cd693e34980..244b8528eb16 100644
--- a/drivers/soc/mediatek/mtk-cmdq-helper.c
+++ b/drivers/soc/mediatek/mtk-cmdq-helper.c
@@ -284,6 +284,37 @@ int cmdq_pkt_write_s(struct cmdq_pkt *pkt, phys_addr_t addr, u16 reg_idx,
 }
 EXPORT_SYMBOL(cmdq_pkt_write_s);
 
+int cmdq_pkt_write_s_value(struct cmdq_pkt *pkt, dma_addr_t addr,
+			   u32 value, u32 mask)
+{
+	struct cmdq_instruction inst = { {0} };
+	int err;
+	const u16 dst_reg_idx = CMDQ_SPR_TEMP;
+
+	err = cmdq_pkt_assign(pkt, dst_reg_idx, CMDQ_ADDR_HIGH(addr));
+	if (err < 0)
+		return 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 = dst_reg_idx;
+	inst.offset = CMDQ_ADDR_LOW(addr);
+	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 bc28a41d7780..4bce240dbb56 100644
--- a/include/linux/soc/mediatek/mtk-cmdq.h
+++ b/include/linux/soc/mediatek/mtk-cmdq.h
@@ -128,6 +128,18 @@ int cmdq_pkt_read_s(struct cmdq_pkt *pkt, phys_addr_t addr, u16 reg_idx);
 int cmdq_pkt_write_s(struct cmdq_pkt *pkt, phys_addr_t addr, u16 reg_idx,
 		     u32 mask);
 
+/**
+ * cmdq_pkt_write_s() - append write_s command with mask to the CMDQ packet
+ * @pkt:	the CMDQ packet
+ * @addr:	the physical address of register or dma
+ * @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, dma_addr_t addr,
+			   u32 value, u32 mask);
+
 /**
  * cmdq_pkt_wfe() - append wait for event command to the CMDQ packet
  * @pkt:	the CMDQ packet
-- 
2.18.0