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soc: mediatek: cmdq: add write_s function 

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

Signed-off-by: Dennis YC Hsieh <dennis-yc.hsieh@mediatek.com>
Link: https://lore.kernel.org/r/1594136714-11650-3-git-send-email-dennis-yc.hsieh@mediatek.com
Signed-off-by: Matthias Brugger <matthias.bgg@gmail.com>
This commit is contained in:
Dennis YC Hsieh 2020-07-07 23:45:07 +08:00 committed by Matthias Brugger
parent 2b8cf38343
commit 5f6e560c2d
3 changed files with 39 additions and 0 deletions
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19
drivers/soc/mediatek/mtk-cmdq-helper.c
View File

@ -18,6 +18,10 @@ struct cmdq_instruction {
union {
u32 value;
u32 mask;
struct {
u16 arg_c;
u16 src_reg;
};
};
union {
u16 offset;
@ -223,6 +227,21 @@ int cmdq_pkt_write_mask(struct cmdq_pkt *pkt, u8 subsys,
}
EXPORT_SYMBOL(cmdq_pkt_write_mask);
int cmdq_pkt_write_s(struct cmdq_pkt *pkt, u16 high_addr_reg_idx,
u16 addr_low, u16 src_reg_idx)
{
struct cmdq_instruction inst = {};
inst.op = CMDQ_CODE_WRITE_S;
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);
int cmdq_pkt_wfe(struct cmdq_pkt *pkt, u16 event)
{
struct cmdq_instruction inst = { {0} };

1
include/linux/mailbox/mtk-cmdq-mailbox.h
View File

@ -60,6 +60,7 @@ enum cmdq_code {
CMDQ_CODE_JUMP = 0x10,
CMDQ_CODE_WFE = 0x20,
CMDQ_CODE_EOC = 0x40,
CMDQ_CODE_WRITE_S = 0x90,
CMDQ_CODE_LOGIC = 0xa0,
};

19
include/linux/soc/mediatek/mtk-cmdq.h
View File

@ -12,6 +12,8 @@
#include <linux/timer.h>
#define CMDQ_NO_TIMEOUT 0xffffffffu
#define CMDQ_ADDR_HIGH(addr) ((u32)(((addr) >> 16) & GENMASK(31, 0)))
#define CMDQ_ADDR_LOW(addr) ((u16)(addr) | BIT(1))
struct cmdq_pkt;
@ -102,6 +104,23 @@ int cmdq_pkt_write(struct cmdq_pkt *pkt, u8 subsys, u16 offset, u32 value);
int cmdq_pkt_write_mask(struct cmdq_pkt *pkt, u8 subsys,
u16 offset, u32 value, u32 mask);
/**
* cmdq_pkt_write_s() - append write_s 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
*
* 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(struct cmdq_pkt *pkt, u16 high_addr_reg_idx,
u16 addr_low, u16 src_reg_idx);
/**
* cmdq_pkt_wfe() - append wait for event command to the CMDQ packet
* @pkt: the CMDQ packet