[PATCH v2 3/8] soc: mediatek: cmdq: add write_s_mask function

[Dennis YC Hsieh]

add write_s_mask function in cmdq helper functions which
writes value contains in internal register to address
with mask and large dma access support.

Signed-off-by: Dennis YC Hsieh <dennis-yc.hs...@mediatek.com>
---
 drivers/soc/mediatek/mtk-cmdq-helper.c   |   23 +++++++++++++++++++++++
 include/linux/mailbox/mtk-cmdq-mailbox.h |    1 +
 include/linux/soc/mediatek/mtk-cmdq.h    |   18 ++++++++++++++++++
 3 files changed, 42 insertions(+)

diff --git a/drivers/soc/mediatek/mtk-cmdq-helper.c 
b/drivers/soc/mediatek/mtk-cmdq-helper.c
index 880349b3f16c..550e9e7e3ff2 100644
--- a/drivers/soc/mediatek/mtk-cmdq-helper.c
+++ b/drivers/soc/mediatek/mtk-cmdq-helper.c
@@ -242,6 +242,29 @@ 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_mask(struct cmdq_pkt *pkt, u16 high_addr_reg_idx,
+                         u16 addr_low, u16 src_reg_idx, u32 mask)
+{
+       struct cmdq_instruction inst = {};
+       int err;
+
+       inst.op = CMDQ_CODE_MASK;
+       inst.mask = ~mask;
+       err = cmdq_pkt_append_command(pkt, inst);
+       if (err < 0)
+               return err;
+
+       inst.mask = 0;
+       inst.op = CMDQ_CODE_WRITE_S_MASK;
+       inst.src_t = CMDQ_REG_TYPE;
+       inst.sop = high_addr_reg_idx;
+       inst.offset = addr_low;
+       inst.src_reg = src_reg_idx;
+
+       return cmdq_pkt_append_command(pkt, inst);
+}
+EXPORT_SYMBOL(cmdq_pkt_write_s_mask);
+
 int cmdq_pkt_wfe(struct cmdq_pkt *pkt, u16 event)
 {
        struct cmdq_instruction inst = { {0} };
diff --git a/include/linux/mailbox/mtk-cmdq-mailbox.h 
b/include/linux/mailbox/mtk-cmdq-mailbox.h
index 1f76cfedb16d..90d1d8e64412 100644
--- a/include/linux/mailbox/mtk-cmdq-mailbox.h
+++ b/include/linux/mailbox/mtk-cmdq-mailbox.h
@@ -61,6 +61,7 @@ enum cmdq_code {
        CMDQ_CODE_WFE = 0x20,
        CMDQ_CODE_EOC = 0x40,
        CMDQ_CODE_WRITE_S = 0x90,
+       CMDQ_CODE_WRITE_S_MASK = 0x91,
        CMDQ_CODE_LOGIC = 0xa0,
 };
 
diff --git a/include/linux/soc/mediatek/mtk-cmdq.h 
b/include/linux/soc/mediatek/mtk-cmdq.h
index 9b0c57a0063d..53230341bf94 100644
--- a/include/linux/soc/mediatek/mtk-cmdq.h
+++ b/include/linux/soc/mediatek/mtk-cmdq.h
@@ -122,6 +122,24 @@ int cmdq_pkt_write_s(struct cmdq_pkt *pkt, u16 
high_addr_reg_idx,
                     u16 addr_low, u16 src_reg_idx);
 
 /**
+ * cmdq_pkt_write_s_mask() - append write_s with mask command to the CMDQ 
packet
+ * @pkt:       the CMDQ packet
+ * @high_addr_reg_idx: internal register ID which contains high address of pa
+ * @addr_low:  low address of pa
+ * @src_reg_idx:       the CMDQ internal register ID which cache source value
+ * @mask:      the specified target address mask, use U32_MAX if no need
+ *
+ * Return: 0 for success; else the error code is returned
+ *
+ * Support write value to physical address without subsys. Use CMDQ_ADDR_HIGH()
+ * to get high address and call cmdq_pkt_assign() to assign value into internal
+ * reg. Also use CMDQ_ADDR_LOW() to get low address for addr_low parameter when
+ * call to this function.
+ */
+int cmdq_pkt_write_s_mask(struct cmdq_pkt *pkt, u16 high_addr_reg_idx,
+                         u16 addr_low, u16 src_reg_idx, u32 mask);
+
+/**
  * cmdq_pkt_wfe() - append wait for event command to the CMDQ packet
  * @pkt:       the CMDQ packet
  * @event:     the desired event type to "wait and CLEAR"
-- 
1.7.9.5