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[111.98.84.235]) by smtp.gmail.com with ESMTPSA id s15sm4867039pfe.108.2021.03.12.01.45.07 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 12 Mar 2021 01:45:10 -0800 (PST) From: tkuw584924@gmail.com X-Google-Original-From: Takahiro.Kuwano@infineon.com To: linux-mtd@lists.infradead.org Cc: tudor.ambarus@microchip.com, miquel.raynal@bootlin.com, richard@nod.at, vigneshr@ti.com, p.yadav@ti.com, tkuw584924@gmail.com, Bacem.Daassi@infineon.com, Takahiro Kuwano Subject: [PATCH v3 5/6] mtd: spi-nor: spansion: Add status check for multi-die parts Date: Fri, 12 Mar 2021 18:44:58 +0900 Message-Id: <1fa9ac4c5f3d66dea51549458a1d32823b06bb10.1615523176.git.Takahiro.Kuwano@infineon.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: References: MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20210312_094512_668933_762E6010 X-CRM114-Status: GOOD ( 16.18 ) X-BeenThere: linux-mtd@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: Linux MTD discussion mailing list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-mtd" Errors-To: linux-mtd-bounces+linux-mtd=archiver.kernel.org@lists.infradead.org From: Takahiro Kuwano The multi-die package parts from Spansion/Cypress require to check the status register value in each die to detemine the device is ready. This patch adds a helper that queries status of each die by Read Any Register command. The device specific ->ready() hook will call this helper with the number of dummy cycles and die size. Signed-off-by: Takahiro Kuwano --- Changes in v3: - New in v3 drivers/mtd/spi-nor/spansion.c | 46 ++++++++++++++++++++++++++++++++++ 1 file changed, 46 insertions(+) diff --git a/drivers/mtd/spi-nor/spansion.c b/drivers/mtd/spi-nor/spansion.c index b5b5df4836c6..5742212fde2e 100644 --- a/drivers/mtd/spi-nor/spansion.c +++ b/drivers/mtd/spi-nor/spansion.c @@ -10,6 +10,7 @@ #define SPINOR_OP_RD_ANY_REG 0x65 /* Read any register */ #define SPINOR_OP_WR_ANY_REG 0x71 /* Write any register */ +#define SPINOR_REG_CYPRESS_STR1V 0x00800000 #define SPINOR_REG_CYPRESS_CFR1V 0x00800002 #define SPINOR_REG_CYPRESS_CFR1V_QUAD_EN BIT(1) /* Quad Enable */ #define SPINOR_REG_CYPRESS_CFR2V 0x00800003 @@ -179,6 +180,51 @@ static int spansion_quad_enable_volatile(struct spi_nor *nor, u8 reg_dummy, return 0; } +/** + * spansion_mdp_ready() - Query the Status Register via Read Any Register + * command for multi-die package parts that do not + * support legacy RDSR(05h) + * @nor: pointer to 'struct spi_nor'. + * @reg_dummy: number of dummy cycles for register read + * @die_size: size of each die to determine the number of dies + * + * Return: 1 if ready, 0 if not ready, -errno on errors. + */ +static int spansion_mdp_ready(struct spi_nor *nor, u8 reg_dummy, u32 die_size) +{ + int ret; + u32 base; + u8 sr; + + for (base = 0; base < nor->params->size; base += die_size) { + ret = spansion_read_any_reg(nor, + base + SPINOR_REG_CYPRESS_STR1V, + reg_dummy, &sr); + if (ret) + return ret; + + if (sr & (SR_E_ERR | SR_P_ERR)) { + if (sr & SR_E_ERR) + dev_err(nor->dev, "Erase Error occurred\n"); + else + dev_err(nor->dev, "Programming Error occurred\n"); + + spi_nor_clear_sr(nor); + + ret = spi_nor_write_disable(nor); + if (ret) + return ret; + + return -EIO; + } + + if (sr & SR_WIP) + return 0; + } + + return 1; +} + /** * spi_nor_cypress_octal_dtr_enable() - Enable octal DTR on Cypress flashes. * @nor: pointer to a 'struct spi_nor' -- 2.25.1 ______________________________________________________ Linux MTD discussion mailing list http://lists.infradead.org/mailman/listinfo/linux-mtd/