[Qemu-devel] [PATCH 10/12] Support for quad commands.

[marcin.krzeminski@nokia.com]

From: Marcin Krzeminski <marcin.krzeminski@nokia.com>

Signed-off-by: Pawel Lenkow <pawel.lenkow@nokia.com>
---
 hw/block/m25p80.c | 38 ++++++++++++++++++++++++++++++++++++--
 1 file changed, 36 insertions(+), 2 deletions(-)

diff --git a/hw/block/m25p80.c b/hw/block/m25p80.c
index 6fc55a3..25ec666 100644
--- a/hw/block/m25p80.c
+++ b/hw/block/m25p80.c
@@ -255,19 +255,24 @@ typedef enum {
     BULK_ERASE = 0xc7,
 
     READ = 0x3,
+    READ4 = 0x13,
     FAST_READ = 0xb,
     DOR = 0x3b,
     QOR = 0x6b,
     DIOR = 0xbb,
     QIOR = 0xeb,
+    QIOR4 = 0xec,
 
     PP = 0x2,
+    PP4 = 0x12,
     DPP = 0xa2,
     QPP = 0x32,
 
     ERASE_4K = 0x20,
+    ERASE4_4K = 0x21,
     ERASE_32K = 0x52,
     ERASE_SECTOR = 0xd8,
+    ERASE4_SECTOR = 0xdc,
 
     EN_4BYTE_ADDR = 0xB7,
     EX_4BYTE_ADDR = 0xE9,
@@ -307,6 +312,7 @@ typedef struct Flash {
     bool write_enable;
     bool four_bytes_address_mode;
     bool reset_enable;
+    bool quad_enable;
     bool initialized;
     uint8_t reset_pin;
     uint8_t ear;
@@ -381,6 +387,7 @@ static void flash_erase(Flash *s, int offset, FlashCMD cmd)
 
     switch (cmd) {
     case ERASE_4K:
+    case ERASE4_4K:
         len = 4 << 10;
         capa_to_assert = ER_4K;
         break;
@@ -389,6 +396,7 @@ static void flash_erase(Flash *s, int offset, FlashCMD cmd)
         capa_to_assert = ER_32K;
         break;
     case ERASE_SECTOR:
+    case ERASE4_SECTOR:
         len = s->pi->sector_size;
         break;
     case BULK_ERASE:
@@ -447,6 +455,14 @@ void flash_write8(Flash *s, uint64_t addr, uint8_t data)
 
 static inline int is_4bytes(Flash *s)
 {
+   switch (s->cmd_in_progress) {
+   case PP4:
+   case READ4:
+   case QIOR4:
+   case ERASE4_4K:
+   case ERASE4_SECTOR:
+       return 1;
+   default:
        return s->four_bytes_address_mode;
    }
 }
@@ -472,19 +488,24 @@ static void complete_collecting_data(Flash *s)
     case DPP:
     case QPP:
     case PP:
+    case PP4:
         s->state = STATE_PAGE_PROGRAM;
         break;
     case READ:
+    case READ4:
     case FAST_READ:
     case DOR:
     case QOR:
     case DIOR:
     case QIOR:
+    case QIOR4:
         s->state = STATE_READ;
         break;
     case ERASE_4K:
+    case ERASE4_4K:
     case ERASE_32K:
     case ERASE_SECTOR:
+    case ERASE4_SECTOR:
         flash_erase(s, s->cur_addr, s->cmd_in_progress);
         break;
     case WRSR:
@@ -512,6 +533,7 @@ static void reset_memory(Flash *s)
     s->state = STATE_IDLE;
     s->write_enable = false;
     s->reset_enable = false;
+    s->quad_enable = false;
 
     DB_PRINT_L(0, "Reset done.\n");
 }
@@ -519,18 +541,23 @@ static void reset_memory(Flash *s)
 static void decode_new_cmd(Flash *s, uint32_t value)
 {
     s->cmd_in_progress = value;
+    int i;
     DB_PRINT_L(0, "decoded new command:%x\n", value);
 
     switch (value) {
 
     case ERASE_4K:
+    case ERASE4_4K:
     case ERASE_32K:
     case ERASE_SECTOR:
+    case ERASE4_SECTOR:
     case READ:
+    case READ4:
     case DPP:
     case QPP:
     case PP:
-        s->needed_bytes = 3;
+    case PP4:
+        s->needed_bytes = is_4bytes(s) ? 4 : 3;
         s->pos = 0;
         s->len = 0;
         s->state = STATE_COLLECTING_DATA;
@@ -574,7 +601,13 @@ static void decode_new_cmd(Flash *s, uint32_t value)
         s->len = 0;
         s->state = STATE_COLLECTING_DATA;
         break;
-
+    case QIOR4:
+        /* 4 address + 1 dummy */
+        s->needed_bytes = 5;
+        s->pos = 0;
+        s->len = 0;
+        s->state = STATE_COLLECTING_DATA;
+        break;
     case WRSR:
         if (s->write_enable) {
             s->needed_bytes = 1;
@@ -792,6 +825,7 @@ static const VMStateDescription vmstate_m25p80 = {
         VMSTATE_BOOL(four_bytes_address_mode, Flash),
         VMSTATE_UINT8(ear, Flash),
         VMSTATE_BOOL(reset_enable, Flash),
+        VMSTATE_BOOL(quad_enable, Flash),
         VMSTATE_BOOL(initialized, Flash),
         VMSTATE_UINT8(reset_pin, Flash),
         VMSTATE_END_OF_LIST()
-- 
2.5.0