The Write Protect pin of SDHCI model is default active low to match the SDHCI
spec. So, write enable the bit 19 should be 1 and write protected the bit 19
should be 0 at the Present State Register (0x24).

According to the design of AST2500 and AST2600 EVBs, the Write Protected pin
is active high by default. To support it, introduces a new "sdhci_wp_inverted"
property in ASPEED MACHINE State and set it true for AST2500 and AST2600 EVBs
and set "wp_inverted" property true of sdhci-generic model.

Signed-off-by: Jamin Lin <jamin_lin@aspeedtech.com>
Reviewed-by: Andrew Jeffery <andrew@codeconstruct.com.au>
---
 hw/arm/aspeed.c         | 8 ++++++++
 include/hw/arm/aspeed.h | 1 +
 2 files changed, 9 insertions(+)

diff --git a/hw/arm/aspeed.c b/hw/arm/aspeed.c
index e447923536..b10033d536 100644
--- a/hw/arm/aspeed.c
+++ b/hw/arm/aspeed.c
@@ -403,6 +403,12 @@ static void aspeed_machine_init(MachineState *machine)
                              OBJECT(get_system_memory()), &error_abort);
     object_property_set_link(OBJECT(bmc->soc), "dram",
                              OBJECT(machine->ram), &error_abort);
+    if (amc->sdhci_wp_inverted) {
+        for (i = 0; i < bmc->soc->sdhci.num_slots; i++) {
+            object_property_set_bool(OBJECT(&bmc->soc->sdhci.slots[i]),
+                                     "wp-inverted", true, &error_abort);
+        }
+    }
     if (machine->kernel_filename) {
         /*
          * When booting with a -kernel command line there is no u-boot
@@ -1308,6 +1314,7 @@ static void aspeed_machine_ast2500_evb_class_init(ObjectClass *oc, void *data)
     amc->fmc_model = "mx25l25635e";
     amc->spi_model = "mx25l25635f";
     amc->num_cs    = 1;
+    amc->sdhci_wp_inverted = true;
     amc->i2c_init  = ast2500_evb_i2c_init;
     mc->default_ram_size       = 512 * MiB;
     aspeed_machine_class_init_cpus_defaults(mc);
@@ -1409,6 +1416,7 @@ static void aspeed_machine_ast2600_evb_class_init(ObjectClass *oc, void *data)
     amc->num_cs    = 1;
     amc->macs_mask = ASPEED_MAC0_ON | ASPEED_MAC1_ON | ASPEED_MAC2_ON |
                      ASPEED_MAC3_ON;
+    amc->sdhci_wp_inverted = true;
     amc->i2c_init  = ast2600_evb_i2c_init;
     mc->default_ram_size = 1 * GiB;
     aspeed_machine_class_init_cpus_defaults(mc);
diff --git a/include/hw/arm/aspeed.h b/include/hw/arm/aspeed.h
index cbeacb214c..9cae45a1c9 100644
--- a/include/hw/arm/aspeed.h
+++ b/include/hw/arm/aspeed.h
@@ -39,6 +39,7 @@ struct AspeedMachineClass {
     uint32_t macs_mask;
     void (*i2c_init)(AspeedMachineState *bmc);
     uint32_t uart_default;
+    bool sdhci_wp_inverted;
 };
 
 
-- 
2.34.1