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envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Received-SPF: pass client-ip=216.71.153.144; envelope-from=prvs=64494dccb=alistair.francis@wdc.com; helo=esa5.hgst.iphmx.com X-Spam_score_int: -27 X-Spam_score: -2.8 X-Spam_bar: -- X-Spam_report: (-2.8 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_LOW=-0.7, SPF_HELO_PASS=-0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Xuzhou Cheng , Bin Meng , Alistair Francis , Francisco Iglesias Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" X-ZohoMail-DKIM: fail (Header signature does not verify) Content-Type: text/plain; charset="utf-8" From: Xuzhou Cheng Auto Address Increment (AAI) Word-Program is a special command of SST flashes. AAI-WP allows multiple bytes of data to be programmed without re-issuing the next sequential address location. Signed-off-by: Xuzhou Cheng Signed-off-by: Bin Meng Reviewed-by: Francisco Iglesias Message-id: 1608688825-81519-2-git-send-email-bmeng.cn@gmail.com Signed-off-by: Alistair Francis --- hw/block/m25p80.c | 73 +++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 73 insertions(+) diff --git a/hw/block/m25p80.c b/hw/block/m25p80.c index 63278cbda5..b744a58d1c 100644 --- a/hw/block/m25p80.c +++ b/hw/block/m25p80.c @@ -360,6 +360,7 @@ typedef enum { QPP_4 =3D 0x34, RDID_90 =3D 0x90, RDID_AB =3D 0xab, + AAI_WP =3D 0xad, =20 ERASE_4K =3D 0x20, ERASE4_4K =3D 0x21, @@ -456,6 +457,7 @@ struct Flash { bool four_bytes_address_mode; bool reset_enable; bool quad_enable; + bool aai_enable; uint8_t ear; =20 int64_t dirty_page; @@ -671,6 +673,11 @@ static void complete_collecting_data(Flash *s) case PP4_4: s->state =3D STATE_PAGE_PROGRAM; break; + case AAI_WP: + /* AAI programming starts from the even address */ + s->cur_addr &=3D ~BIT(0); + s->state =3D STATE_PAGE_PROGRAM; + break; case READ: case READ4: case FAST_READ: @@ -769,6 +776,7 @@ static void reset_memory(Flash *s) s->write_enable =3D false; s->reset_enable =3D false; s->quad_enable =3D false; + s->aai_enable =3D false; =20 switch (get_man(s)) { case MAN_NUMONYX: @@ -974,6 +982,11 @@ static void decode_qio_read_cmd(Flash *s) s->state =3D STATE_COLLECTING_DATA; } =20 +static bool is_valid_aai_cmd(uint32_t cmd) +{ + return cmd =3D=3D AAI_WP || cmd =3D=3D WRDI || cmd =3D=3D RDSR; +} + static void decode_new_cmd(Flash *s, uint32_t value) { int i; @@ -985,6 +998,11 @@ static void decode_new_cmd(Flash *s, uint32_t value) s->reset_enable =3D false; } =20 + if (get_man(s) =3D=3D MAN_SST && s->aai_enable && !is_valid_aai_cmd(va= lue)) { + qemu_log_mask(LOG_GUEST_ERROR, + "M25P80: Invalid cmd within AAI programming sequence= "); + } + switch (value) { =20 case ERASE_4K: @@ -1104,6 +1122,9 @@ static void decode_new_cmd(Flash *s, uint32_t value) =20 case WRDI: s->write_enable =3D false; + if (get_man(s) =3D=3D MAN_SST) { + s->aai_enable =3D false; + } break; case WREN: s->write_enable =3D true; @@ -1114,6 +1135,10 @@ static void decode_new_cmd(Flash *s, uint32_t value) if (get_man(s) =3D=3D MAN_MACRONIX) { s->data[0] |=3D (!!s->quad_enable) << 6; } + if (get_man(s) =3D=3D MAN_SST) { + s->data[0] |=3D (!!s->aai_enable) << 6; + } + s->pos =3D 0; s->len =3D 1; s->data_read_loop =3D true; @@ -1261,6 +1286,24 @@ static void decode_new_cmd(Flash *s, uint32_t value) case RSTQIO: s->quad_enable =3D false; break; + case AAI_WP: + if (get_man(s) =3D=3D MAN_SST) { + if (s->write_enable) { + if (s->aai_enable) { + s->state =3D STATE_PAGE_PROGRAM; + } else { + s->aai_enable =3D true; + s->needed_bytes =3D get_addr_length(s); + s->state =3D STATE_COLLECTING_DATA; + } + } else { + qemu_log_mask(LOG_GUEST_ERROR, + "M25P80: AAI_WP with write protect\n"); + } + } else { + qemu_log_mask(LOG_GUEST_ERROR, "M25P80: Unknown cmd %x\n", val= ue); + } + break; default: s->pos =3D 0; s->len =3D 1; @@ -1306,6 +1349,17 @@ static uint32_t m25p80_transfer8(SSIPeripheral *ss, = uint32_t tx) trace_m25p80_page_program(s, s->cur_addr, (uint8_t)tx); flash_write8(s, s->cur_addr, (uint8_t)tx); s->cur_addr =3D (s->cur_addr + 1) & (s->size - 1); + + if (get_man(s) =3D=3D MAN_SST && s->aai_enable && s->cur_addr =3D= =3D 0) { + /* + * There is no wrap mode during AAI programming once the highe= st + * unprotected memory address is reached. The Write-Enable-Lat= ch + * bit is automatically reset, and AAI programming mode aborts. + */ + s->write_enable =3D false; + s->aai_enable =3D false; + } + break; =20 case STATE_READ: @@ -1451,6 +1505,24 @@ static const VMStateDescription vmstate_m25p80_data_= read_loop =3D { } }; =20 +static bool m25p80_aai_enable_needed(void *opaque) +{ + Flash *s =3D (Flash *)opaque; + + return s->aai_enable; +} + +static const VMStateDescription vmstate_m25p80_aai_enable =3D { + .name =3D "m25p80/aai_enable", + .version_id =3D 1, + .minimum_version_id =3D 1, + .needed =3D m25p80_aai_enable_needed, + .fields =3D (VMStateField[]) { + VMSTATE_BOOL(aai_enable, Flash), + VMSTATE_END_OF_LIST() + } +}; + static const VMStateDescription vmstate_m25p80 =3D { .name =3D "m25p80", .version_id =3D 0, @@ -1481,6 +1553,7 @@ static const VMStateDescription vmstate_m25p80 =3D { }, .subsections =3D (const VMStateDescription * []) { &vmstate_m25p80_data_read_loop, + &vmstate_m25p80_aai_enable, NULL } }; --=20 2.29.2