From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:33084) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1cPZaT-0004du-Mh for qemu-devel@nongnu.org; Fri, 06 Jan 2017 13:50:03 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1cPZaS-0006cZ-On for qemu-devel@nongnu.org; Fri, 06 Jan 2017 13:50:01 -0500 From: Marcin Krzeminski Date: Fri, 6 Jan 2017 19:49:47 +0100 Message-Id: <20170106184948.3422-3-mar.krzeminski@gmail.com> In-Reply-To: <20170106184948.3422-1-mar.krzeminski@gmail.com> References: <20170106184948.3422-1-mar.krzeminski@gmail.com> Subject: [Qemu-devel] [PATCH v2 2/3] block: m25p80: Introduce die erase command List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: qemu-devel@nongnu.org, edgar.iglesias@xilinx.com Cc: peter.maydell@linaro.org, qemu-arm@nongnu.org, clg@kaod.org Modern big flash nor devices consist from more than one die. Some of them do not support chip erase and instead have die erase command that can erase one die only. This commit adds possibility to define number of dies in the chip and adds support for die erase command. Nor flash model is not strict thus option to disable chip eras was not added. Signed-off-by: Marcin Krzeminski --- hw/block/m25p80.c | 42 +++++++++++++++++++++++++++++++++++++++++- 1 file changed, 41 insertions(+), 1 deletion(-) diff --git a/hw/block/m25p80.c b/hw/block/m25p80.c index 6dff81b..b065ddc 100644 --- a/hw/block/m25p80.c +++ b/hw/block/m25p80.c @@ -73,6 +73,12 @@ typedef struct FlashPartInfo { uint32_t n_sectors; uint32_t page_size; uint16_t flags; + /* + * Big sized spi nor are often stacked devices, thus sometime + * replace chip erase with die erase. + * This field inform how many die is in the chip. + */ + uint8_t die_cnt; } FlashPartInfo; /* adapted from linux */ @@ -90,7 +96,8 @@ typedef struct FlashPartInfo { .sector_size = (_sector_size),\ .n_sectors = (_n_sectors),\ .page_size = 256,\ - .flags = (_flags), + .flags = (_flags),\ + .die_cnt = 0 #define INFO6(_part_name, _jedec_id, _ext_id, _sector_size, _n_sectors, _flags)\ .part_name = _part_name,\ @@ -107,6 +114,24 @@ typedef struct FlashPartInfo { .n_sectors = (_n_sectors),\ .page_size = 256,\ .flags = (_flags),\ + .die_cnt = 0 + +#define INFO_STACKED(_part_name, _jedec_id, _ext_id, _sector_size, _n_sectors,\ + _flags, _die_cnt)\ + .part_name = _part_name,\ + .id = {\ + ((_jedec_id) >> 16) & 0xff,\ + ((_jedec_id) >> 8) & 0xff,\ + (_jedec_id) & 0xff,\ + ((_ext_id) >> 8) & 0xff,\ + (_ext_id) & 0xff,\ + },\ + .id_len = (!(_jedec_id) ? 0 : (3 + ((_ext_id) ? 2 : 0))),\ + .sector_size = (_sector_size),\ + .n_sectors = (_n_sectors),\ + .page_size = 256,\ + .flags = (_flags),\ + .die_cnt = _die_cnt #define JEDEC_NUMONYX 0x20 #define JEDEC_WINBOND 0xEF @@ -359,6 +384,8 @@ typedef enum { REVCR = 0x65, WEVCR = 0x61, + + DIE_ERASE = 0xC4, } FlashCMD; typedef enum { @@ -514,6 +541,17 @@ static void flash_erase(Flash *s, int offset, FlashCMD cmd) case BULK_ERASE: len = s->size; break; + case DIE_ERASE: + if (s->pi->die_cnt) { + len = s->size / s->pi->die_cnt; + offset = offset & (~(len - 1)); + printf("Die erase len = 0x%X offset = 0x%X!\n", len, offset); + } else { + qemu_log_mask(LOG_GUEST_ERROR, "M25P80: die erase is not supported" + " by device\n"); + return; + } + break; default: abort(); } @@ -635,6 +673,7 @@ static void complete_collecting_data(Flash *s) case ERASE4_32K: case ERASE_SECTOR: case ERASE4_SECTOR: + case DIE_ERASE: flash_erase(s, s->cur_addr, s->cmd_in_progress); break; case WRSR: @@ -881,6 +920,7 @@ static void decode_new_cmd(Flash *s, uint32_t value) case PP: case PP4: case PP4_4: + case DIE_ERASE: s->needed_bytes = get_addr_length(s); s->pos = 0; s->len = 0; -- 2.9.3