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| author | Ley Foon Tan <ley.foon.tan@intel.com> | 2020-08-12 09:56:25 +0800 |
|---|---|---|
| committer | Ley Foon Tan <ley.foon.tan@intel.com> | 2020-10-09 17:53:13 +0800 |
| commit | de84e2d8c9e60452a2a1a6f99474d54a9919c024 (patch) | |
| tree | 3bf1fc2fbf67ce3d8832490ef68da9be3b301c3d /arch | |
| parent | 6a48f95c6be15f0b2cad49b9ba1b7e04374da641 (diff) | |
| download | u-boot-de84e2d8c9e60452a2a1a6f99474d54a9919c024.zip u-boot-de84e2d8c9e60452a2a1a6f99474d54a9919c024.tar.gz u-boot-de84e2d8c9e60452a2a1a6f99474d54a9919c024.tar.bz2 | |
arm: socfpga: mailbox: Add mailbox retry support
Resend mailbox command for 3 times with 2ms interval in between if
it receives MBOX_RESP_TIMEOUT and MBOX_RESP_DEVICE_BUSY response code.
Add a wrapper function mbox_send_cmd_common_retry() for retry, change
all the callers to use this wrapper function.
Signed-off-by: Ley Foon Tan <ley.foon.tan@intel.com>
Signed-off-by: Chee Hong Ang <chee.hong.ang@intel.com>
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/arm/mach-socfpga/mailbox_s10.c | 40 |
1 files changed, 31 insertions, 9 deletions
diff --git a/arch/arm/mach-socfpga/mailbox_s10.c b/arch/arm/mach-socfpga/mailbox_s10.c index a9ec818..18d4492 100644 --- a/arch/arm/mach-socfpga/mailbox_s10.c +++ b/arch/arm/mach-socfpga/mailbox_s10.c @@ -296,11 +296,33 @@ static __always_inline int mbox_send_cmd_common(u8 id, u32 cmd, u8 is_indirect, return resp_err; } } - }; + } return -EIO; } +static __always_inline int mbox_send_cmd_common_retry(u8 id, u32 cmd, + u8 is_indirect, + u32 len, u32 *arg, + u8 urgent, + u32 *resp_buf_len, + u32 *resp_buf) +{ + int ret; + int i; + + for (i = 0; i < 3; i++) { + ret = mbox_send_cmd_common(id, cmd, is_indirect, len, arg, + urgent, resp_buf_len, resp_buf); + if (ret == MBOX_RESP_TIMEOUT || ret == MBOX_RESP_DEVICE_BUSY) + udelay(2000); /* wait for 2ms before resend */ + else + break; + } + + return ret; +} + int mbox_init(void) { int ret; @@ -395,10 +417,10 @@ static __always_inline int mbox_get_fpga_config_status_common(u32 cmd) int ret; reconfig_status_resp_len = RECONFIG_STATUS_RESPONSE_LEN; - ret = mbox_send_cmd_common(MBOX_ID_UBOOT, cmd, - MBOX_CMD_DIRECT, 0, NULL, 0, - &reconfig_status_resp_len, - reconfig_status_resp); + ret = mbox_send_cmd_common_retry(MBOX_ID_UBOOT, cmd, + MBOX_CMD_DIRECT, 0, NULL, 0, + &reconfig_status_resp_len, + reconfig_status_resp); if (ret) return ret; @@ -438,16 +460,16 @@ int __secure mbox_get_fpga_config_status_psci(u32 cmd) int mbox_send_cmd(u8 id, u32 cmd, u8 is_indirect, u32 len, u32 *arg, u8 urgent, u32 *resp_buf_len, u32 *resp_buf) { - return mbox_send_cmd_common(id, cmd, is_indirect, len, arg, urgent, - resp_buf_len, resp_buf); + return mbox_send_cmd_common_retry(id, cmd, is_indirect, len, arg, + urgent, resp_buf_len, resp_buf); } int __secure mbox_send_cmd_psci(u8 id, u32 cmd, u8 is_indirect, u32 len, u32 *arg, u8 urgent, u32 *resp_buf_len, u32 *resp_buf) { - return mbox_send_cmd_common(id, cmd, is_indirect, len, arg, urgent, - resp_buf_len, resp_buf); + return mbox_send_cmd_common_retry(id, cmd, is_indirect, len, arg, + urgent, resp_buf_len, resp_buf); } int mbox_send_cmd_only(u8 id, u32 cmd, u8 is_indirect, u32 len, u32 *arg) |