From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-we0-f177.google.com ([74.125.82.177]) by bombadil.infradead.org with esmtps (Exim 4.80.1 #2 (Red Hat Linux)) id 1WQZB7-0006Uh-Ft for linux-mtd@lists.infradead.org; Thu, 20 Mar 2014 09:22:21 +0000 Received: by mail-we0-f177.google.com with SMTP id u57so361922wes.22 for ; Thu, 20 Mar 2014 02:22:02 -0700 (PDT) From: Lee Jones To: linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, computersforpeace@gmail.com Subject: [PATCH v6 21/36] mtd: st_spi_fsm: Provide the default read/write configurations Date: Thu, 20 Mar 2014 09:20:53 +0000 Message-Id: <1395307268-12721-22-git-send-email-lee.jones@linaro.org> In-Reply-To: <1395307268-12721-1-git-send-email-lee.jones@linaro.org> References: <1395307268-12721-1-git-send-email-lee.jones@linaro.org> Cc: dwmw2@infradead.org, Lee Jones , linux-mtd@lists.infradead.org, Angus.Clark@st.com List-Id: Linux MTD discussion mailing list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Message sequences can vary depending on how many pads (lines) are required to address the chip (mode & dummy), how many data pads (lines) are required to write out to the chip which will determine speed amongst other things which are detailed by the SFDP specification. We are able to use multiple configurations for each chip, but they need to me matched to a device's capabilities. These configurations are listed in preference order - most preferred first. Acked-by Angus Clark Signed-off-by: Lee Jones --- drivers/mtd/devices/st_spi_fsm.c | 27 +++++++++++++++++++++++++++ 1 file changed, 27 insertions(+) diff --git a/drivers/mtd/devices/st_spi_fsm.c b/drivers/mtd/devices/st_spi_fsm.c index 5683443..03b49a4 100644 --- a/drivers/mtd/devices/st_spi_fsm.c +++ b/drivers/mtd/devices/st_spi_fsm.c @@ -375,6 +375,33 @@ static struct flash_info flash_types[] = { { NULL, 0x000000, 0, 0, 0, 0, 0, NULL }, }; +/* + * FSM message sequence configurations: + * + * All configs are presented in order of preference + */ + +/* Default READ configurations, in order of preference */ +static struct seq_rw_config default_read_configs[] = { + {FLASH_FLAG_READ_1_4_4, FLASH_CMD_READ_1_4_4, 0, 4, 4, 0x00, 2, 4}, + {FLASH_FLAG_READ_1_1_4, FLASH_CMD_READ_1_1_4, 0, 1, 4, 0x00, 4, 0}, + {FLASH_FLAG_READ_1_2_2, FLASH_CMD_READ_1_2_2, 0, 2, 2, 0x00, 4, 0}, + {FLASH_FLAG_READ_1_1_2, FLASH_CMD_READ_1_1_2, 0, 1, 2, 0x00, 0, 8}, + {FLASH_FLAG_READ_FAST, FLASH_CMD_READ_FAST, 0, 1, 1, 0x00, 0, 8}, + {FLASH_FLAG_READ_WRITE, FLASH_CMD_READ, 0, 1, 1, 0x00, 0, 0}, + {0x00, 0, 0, 0, 0, 0x00, 0, 0}, +}; + +/* Default WRITE configurations */ +static struct seq_rw_config default_write_configs[] = { + {FLASH_FLAG_WRITE_1_4_4, FLASH_CMD_WRITE_1_4_4, 1, 4, 4, 0x00, 0, 0}, + {FLASH_FLAG_WRITE_1_1_4, FLASH_CMD_WRITE_1_1_4, 1, 1, 4, 0x00, 0, 0}, + {FLASH_FLAG_WRITE_1_2_2, FLASH_CMD_WRITE_1_2_2, 1, 2, 2, 0x00, 0, 0}, + {FLASH_FLAG_WRITE_1_1_2, FLASH_CMD_WRITE_1_1_2, 1, 1, 2, 0x00, 0, 0}, + {FLASH_FLAG_READ_WRITE, FLASH_CMD_WRITE, 1, 1, 1, 0x00, 0, 0}, + {0x00, 0, 0, 0, 0, 0x00, 0, 0}, +}; + static struct stfsm_seq stfsm_seq_en_32bit_addr;/* Dynamically populated */ static struct stfsm_seq stfsm_seq_read_jedec = { -- 1.8.3.2