diff options
| author | Naresh Kumar Ravulapalli <[email protected]> | 2025-08-08 02:36:59 -0700 |
|---|---|---|
| committer | Tien Fong Chee <[email protected]> | 2025-09-30 14:29:53 +0800 |
| commit | 5d2ef97c66f0a432c859cfdf64ef696017619ad6 (patch) | |
| tree | 4ab7a32c3cb823c188faa676d1f994ade7ae895c | |
| parent | 3d084d91eda63fde4a159bc866816c9c6b1ae6ce (diff) | |
drivers: ddr: altera: Check IOSSM mailbox compatibility
Compatibility check of IOSSM mailbox with U-Boot is performed
by verifying the mailbox specification version. If check fails,
appropriate error message is displayed.
Signed-off-by: Naresh Kumar Ravulapalli <[email protected]>
Reviewed-by: Tien Fong Chee <[email protected]>
| -rw-r--r-- | drivers/ddr/altera/iossm_mailbox.c | 24 |
1 files changed, 24 insertions, 0 deletions
diff --git a/drivers/ddr/altera/iossm_mailbox.c b/drivers/ddr/altera/iossm_mailbox.c index 21f94959a04..2a2f86a650e 100644 --- a/drivers/ddr/altera/iossm_mailbox.c +++ b/drivers/ddr/altera/iossm_mailbox.c @@ -38,6 +38,8 @@ #define IOSSM_STATUS_CMD_RESPONSE_ERROR(n) FIELD_GET(IOSSM_STATUS_CMD_RESPONSE_ERROR_MASK, n) #define IOSSM_STATUS_GENERAL_ERROR_MASK GENMASK(4, 1) #define IOSSM_STATUS_GENERAL_ERROR(n) FIELD_GET(IOSSM_STATUS_GENERAL_ERROR_MASK, n) +#define IOSSM_MAILBOX_SPEC_VERSION_MASK GENMASK(2, 0) +#define IOSSM_MAILBOX_SPEC_VERSION(n) FIELD_GET(IOSSM_MAILBOX_SPEC_VERSION_MASK, n) /* Offset of Mailbox Read-only Registers */ #define IOSSM_MAILBOX_HEADER_OFFSET 0x0 @@ -383,6 +385,23 @@ err: return ret; } +static bool is_mailbox_spec_compatible(struct io96b_info *io96b_ctrl) +{ + u32 mailbox_header; + u8 mailbox_spec_ver; + + mailbox_header = readl(io96b_ctrl->io96b[0].io96b_csr_addr + + IOSSM_MAILBOX_HEADER_OFFSET); + mailbox_spec_ver = IOSSM_MAILBOX_SPEC_VERSION(mailbox_header); + printf("%s: IOSSM mailbox version: %d\n", __func__, mailbox_spec_ver); + + /* for now there are two mailbox spec versions, 0 and 1; only version 1 is compatible */ + if (!mailbox_spec_ver) + return false; + + return true; +} + /* * Initial function to be called to set memory interface IP type and instance ID * IP type and instance ID need to be determined before sending mailbox command @@ -392,6 +411,11 @@ void io96b_mb_init(struct io96b_info *io96b_ctrl) int i, j; u32 mem_intf_info_0, mem_intf_info_1; + if (!is_mailbox_spec_compatible(io96b_ctrl)) { + printf("DDR: Failed to get compatible mailbox version\n"); + hang(); + } + debug("%s: num_instance %d\n", __func__, io96b_ctrl->num_instance); for (i = 0; i < io96b_ctrl->num_instance; i++) { |