diff options
Diffstat (limited to 'drivers/ddr/altera/iossm_mailbox.c')
| -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++) { |