[Qemu-devel] [PATCH v2 02/12] m25p80: Add support for SST READ ID 0x90/0xAB commands

[Francisco Iglesias <frasse.iglesias@gmail.com>]

Add support for SST READ ID 0x90/0xAB commands for reading out the flash
manufacuter ID and device ID.

Signed-off-by: Francisco Iglesias <frasse.iglesias@gmail.com>
---
 hw/block/m25p80.c | 20 ++++++++++++++++++++
 1 file changed, 20 insertions(+)

diff --git a/hw/block/m25p80.c b/hw/block/m25p80.c
index 2971519..c85e8fa 100644
--- a/hw/block/m25p80.c
+++ b/hw/block/m25p80.c
@@ -355,6 +355,8 @@ typedef enum {
     DPP = 0xa2,
     QPP = 0x32,
     QPP_4 = 0x34,
+    RDID_90 = 0x90,
+    RDID_AB = 0xab,
 
     ERASE_4K = 0x20,
     ERASE4_4K = 0x21,
@@ -405,6 +407,7 @@ typedef enum {
     MAN_MACRONIX,
     MAN_NUMONYX,
     MAN_WINBOND,
+    MAN_SST,
     MAN_GENERIC,
 } Manufacturer;
 
@@ -476,6 +479,8 @@ static inline Manufacturer get_man(Flash *s)
         return MAN_SPANSION;
     case 0xC2:
         return MAN_MACRONIX;
+    case 0xBF:
+        return MAN_SST;
     default:
         return MAN_GENERIC;
     }
@@ -1018,6 +1023,21 @@ static void decode_new_cmd(Flash *s, uint32_t value)
         s->state = STATE_READING_DATA;
         break;
 
+    case RDID_90:
+    case RDID_AB:
+        DB_PRINT_L(0, "populated manf/dev ID\n");
+        if (get_man(s) == MAN_SST) {
+            s->data[0] = s->pi->id[0];
+            s->data[1] = s->pi->id[2];
+            s->pos = 0;
+            s->len = 2;
+            s->data_read_loop = true;
+            s->state = STATE_READING_DATA;
+        } else {
+            qemu_log_mask(LOG_GUEST_ERROR, "M25P80: Unknown cmd %x\n", value);
+        }
+        break;
+
     case BULK_ERASE:
         if (s->write_enable) {
             DB_PRINT_L(0, "chip erase\n");
-- 
2.9.3