shinys000114/linux
1
0
Fork 0
mirror of https://github.com/hardkernel/linux.git synced 2026-06-09 20:32:04 +09:00
Code Issues Packages Projects Releases Wiki Activity

mbox: g12a: add m4 mbox driver [1/3]

Browse Source 
PD#SWPL-12873

Problem:
add m4 mailbox driver

Solution:
add m4 mailbox driver

Verify:
test pass on sm1 skt

Change-Id: Ied77949482179014d9e695ffc606f2ac939c82ca
Signed-off-by: Shunzhou Jiang <shunzhou.jiang@amlogic.com>
This commit is contained in:
Shunzhou Jiang
2018-12-07 16:45:05 +08:00
committed by Tao Zeng
parent 609b26fb02
commit 98cc86a259
3 changed files with 28 additions and 12 deletions
Download Patch File Download Diff File Expand all files Collapse all files

23
drivers/amlogic/mailbox/meson_mhu.c
View File

@@ -35,6 +35,8 @@
#include "meson_mhu.h"
struct device *the_scpi_device;
u32 num_scp_chans;
#define DRIVER_NAME "meson_mhu"
@@ -59,15 +61,15 @@ struct device *the_scpi_device;
* | CPU_INTR_H_CLEAR | 0x048 | TX_CLEAR(H) |
* +--------------------+-------+---------------+
*/
#define RX_OFFSET(chan) (0x10 + (idx) * 0xc)
#define RX_STATUS(chan) (RX_OFFSET(chan) + 0x4)
#define RX_SET(chan) RX_OFFSET(chan)
#define RX_CLEAR(chan) (RX_OFFSET(chan) + 0x8)
#define RX_OFFSET(chan) (0x10 + (chan) * 0xc)
#define RX_STATUS(chan) (RX_OFFSET(chan) + 0x4)
#define RX_SET(chan) RX_OFFSET(chan)
#define RX_CLEAR(chan) (RX_OFFSET(chan) + 0x8)
#define TX_OFFSET(chan) (0x34 + (idx) * 0xc)
#define TX_STATUS(chan) (TX_OFFSET(chan) + 0x4)
#define TX_SET(chan) TX_OFFSET(chan)
#define TX_CLEAR(chan) (TX_OFFSET(chan) + 0x8)
#define TX_OFFSET(chan) (0x34 + (chan) * 0xc)
#define TX_STATUS(chan) (TX_OFFSET(chan) + 0x4)
#define TX_SET(chan) TX_OFFSET(chan)
#define TX_CLEAR(chan) (TX_OFFSET(chan) + 0x8)
/*
* +---------------+-------+----------------+
@@ -221,6 +223,11 @@ static int mhu_probe(struct platform_device *pdev)
ctlr->dev = dev;
platform_set_drvdata(pdev, ctlr);
num_scp_chans = 0;
of_property_read_u32(dev->of_node, "num-chans-to-scp", &num_scp_chans);
if (num_scp_chans == 0 || num_scp_chans > 2)
num_scp_chans = CHANNEL_MAX;
l = devm_kzalloc(dev, sizeof(*l) * CHANNEL_MAX, GFP_KERNEL);
if (!l)
return -ENOMEM;

1
drivers/amlogic/mailbox/meson_mhu.h
View File

@@ -31,3 +31,4 @@ struct mhu_data_buf {
};
extern struct device *the_scpi_device;
extern u32 num_scp_chans;

16
drivers/amlogic/mailbox/scpi_protocol.c
View File

@@ -123,6 +123,8 @@ static int high_priority_cmds[] = {
SCPI_CMD_INIT_DSP,
};
static int m4_cmds[] = {-1};
static struct scpi_dvfs_info *scpi_opps[MAX_DVFS_DOMAINS];
static int scpi_linux_errmap[SCPI_ERR_MAX] = {
@@ -140,11 +142,17 @@ static inline int scpi_to_linux_errno(int errno)
static bool high_priority_chan_supported(int cmd)
{
int idx;
unsigned int idx;
for (idx = 0; idx < ARRAY_SIZE(high_priority_cmds); idx++)
if (cmd == high_priority_cmds[idx])
return true;
if (num_scp_chans == CHANNEL_MAX) {
for (idx = 0; idx < ARRAY_SIZE(high_priority_cmds); idx++)
if (cmd == high_priority_cmds[idx])
return true;
} else {
for (idx = 0; idx < ARRAY_SIZE(m4_cmds); idx++)
if (cmd == m4_cmds[idx])
return true;
}
return false;
}