diff options
Diffstat (limited to 'drivers/nvmem')
| -rw-r--r-- | drivers/nvmem/Kconfig | 9 | ||||
| -rw-r--r-- | drivers/nvmem/Makefile | 2 | ||||
| -rw-r--r-- | drivers/nvmem/imx-iim.c | 8 | ||||
| -rw-r--r-- | drivers/nvmem/imx-ocotp-scu.c | 161 | ||||
| -rw-r--r-- | drivers/nvmem/imx-ocotp.c | 60 | ||||
| -rw-r--r-- | drivers/nvmem/lpc18xx_eeprom.c | 5 | ||||
| -rw-r--r-- | drivers/nvmem/lpc18xx_otp.c | 5 | ||||
| -rw-r--r-- | drivers/nvmem/meson-efuse.c | 10 | ||||
| -rw-r--r-- | drivers/nvmem/meson-mx-efuse.c | 10 | ||||
| -rw-r--r-- | drivers/nvmem/qfprom.c | 10 | ||||
| -rw-r--r-- | drivers/nvmem/rockchip-efuse.c | 10 | ||||
| -rw-r--r-- | drivers/nvmem/snvs_lpgpr.c | 5 | ||||
| -rw-r--r-- | drivers/nvmem/vf610-ocotp.c | 10 |
13 files changed, 225 insertions, 80 deletions
diff --git a/drivers/nvmem/Kconfig b/drivers/nvmem/Kconfig index afa4335e0a20..c2ec750cae6e 100644 --- a/drivers/nvmem/Kconfig +++ b/drivers/nvmem/Kconfig @@ -47,6 +47,13 @@ config NVMEM_IMX_OCOTP This driver can also be built as a module. If so, the module will be called nvmem-imx-ocotp. +config NVMEM_IMX_OCOTP_SCU + tristate "i.MX8 SCU On-Chip OTP Controller support" + depends on IMX_SCU + help + This is a driver for the SCU On-Chip OTP Controller (OCOTP) + available on i.MX8 SoCs. + config NVMEM_LPC18XX_EEPROM tristate "NXP LPC18XX EEPROM Memory Support" depends on ARCH_LPC18XX || COMPILE_TEST @@ -188,7 +195,7 @@ config MESON_MX_EFUSE config NVMEM_SNVS_LPGPR tristate "Support for Low Power General Purpose Register" - depends on SOC_IMX6 || SOC_IMX7D || COMPILE_TEST + depends on ARCH_MXC || COMPILE_TEST help This is a driver for Low Power General Purpose Register (LPGPR) available on i.MX6 and i.MX7 SoCs in Secure Non-Volatile Storage (SNVS) of this chip. diff --git a/drivers/nvmem/Makefile b/drivers/nvmem/Makefile index c1fe4768dfef..e5c153d99a67 100644 --- a/drivers/nvmem/Makefile +++ b/drivers/nvmem/Makefile @@ -16,6 +16,8 @@ obj-$(CONFIG_NVMEM_IMX_IIM) += nvmem-imx-iim.o nvmem-imx-iim-y := imx-iim.o obj-$(CONFIG_NVMEM_IMX_OCOTP) += nvmem-imx-ocotp.o nvmem-imx-ocotp-y := imx-ocotp.o +obj-$(CONFIG_NVMEM_IMX_OCOTP_SCU) += nvmem-imx-ocotp-scu.o +nvmem-imx-ocotp-scu-y := imx-ocotp-scu.o obj-$(CONFIG_NVMEM_LPC18XX_EEPROM) += nvmem_lpc18xx_eeprom.o nvmem_lpc18xx_eeprom-y := lpc18xx_eeprom.o obj-$(CONFIG_NVMEM_LPC18XX_OTP) += nvmem_lpc18xx_otp.o diff --git a/drivers/nvmem/imx-iim.c b/drivers/nvmem/imx-iim.c index 34582293b985..701704b87dc9 100644 --- a/drivers/nvmem/imx-iim.c +++ b/drivers/nvmem/imx-iim.c @@ -1,3 +1,4 @@ +// SPDX-License-Identifier: GPL-2.0-only /* * i.MX IIM driver * @@ -6,13 +7,6 @@ * Based on the barebox iim driver, * Copyright (c) 2010 Baruch Siach <baruch@tkos.co.il>, * Orex Computed Radiography - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License version 2 - * as published by the Free Software Foundation. - * - * http://www.opensource.org/licenses/gpl-license.html - * http://www.gnu.org/copyleft/gpl.html */ #include <linux/device.h> diff --git a/drivers/nvmem/imx-ocotp-scu.c b/drivers/nvmem/imx-ocotp-scu.c new file mode 100644 index 000000000000..d9dc482ecb2f --- /dev/null +++ b/drivers/nvmem/imx-ocotp-scu.c @@ -0,0 +1,161 @@ +// SPDX-License-Identifier: GPL-2.0+ +/* + * i.MX8 OCOTP fusebox driver + * + * Copyright 2019 NXP + * + * Peng Fan <peng.fan@nxp.com> + */ + +#include <linux/firmware/imx/sci.h> +#include <linux/module.h> +#include <linux/nvmem-provider.h> +#include <linux/of_device.h> +#include <linux/platform_device.h> +#include <linux/slab.h> + +enum ocotp_devtype { + IMX8QXP, +}; + +struct ocotp_devtype_data { + int devtype; + int nregs; +}; + +struct ocotp_priv { + struct device *dev; + const struct ocotp_devtype_data *data; + struct imx_sc_ipc *nvmem_ipc; +}; + +struct imx_sc_msg_misc_fuse_read { + struct imx_sc_rpc_msg hdr; + u32 word; +} __packed; + +static struct ocotp_devtype_data imx8qxp_data = { + .devtype = IMX8QXP, + .nregs = 800, +}; + +static int imx_sc_misc_otp_fuse_read(struct imx_sc_ipc *ipc, u32 word, + u32 *val) +{ + struct imx_sc_msg_misc_fuse_read msg; + struct imx_sc_rpc_msg *hdr = &msg.hdr; + int ret; + + hdr->ver = IMX_SC_RPC_VERSION; + hdr->svc = IMX_SC_RPC_SVC_MISC; + hdr->func = IMX_SC_MISC_FUNC_OTP_FUSE_READ; + hdr->size = 2; + + msg.word = word; + + ret = imx_scu_call_rpc(ipc, &msg, true); + if (ret) + return ret; + + *val = msg.word; + + return 0; +} + +static int imx_scu_ocotp_read(void *context, unsigned int offset, + void *val, size_t bytes) +{ + struct ocotp_priv *priv = context; + u32 count, index, num_bytes; + u32 *buf; + void *p; + int i, ret; + + index = offset >> 2; + num_bytes = round_up((offset % 4) + bytes, 4); + count = num_bytes >> 2; + + if (count > (priv->data->nregs - index)) + count = priv->data->nregs - index; + + p = kzalloc(num_bytes, GFP_KERNEL); + if (!p) + return -ENOMEM; + + buf = p; + + for (i = index; i < (index + count); i++) { + if (priv->data->devtype == IMX8QXP) { + if ((i > 271) && (i < 544)) { + *buf++ = 0; + continue; + } + } + + ret = imx_sc_misc_otp_fuse_read(priv->nvmem_ipc, i, buf); + if (ret) { + kfree(p); + return ret; + } + buf++; + } + + memcpy(val, (u8 *)p + offset % 4, bytes); + + kfree(p); + + return 0; +} + +static struct nvmem_config imx_scu_ocotp_nvmem_config = { + .name = "imx-scu-ocotp", + .read_only = true, + .word_size = 4, + .stride = 1, + .owner = THIS_MODULE, + .reg_read = imx_scu_ocotp_read, +}; + +static const struct of_device_id imx_scu_ocotp_dt_ids[] = { + { .compatible = "fsl,imx8qxp-scu-ocotp", (void *)&imx8qxp_data }, + { }, +}; +MODULE_DEVICE_TABLE(of, imx_scu_ocotp_dt_ids); + +static int imx_scu_ocotp_probe(struct platform_device *pdev) +{ + struct device *dev = &pdev->dev; + struct ocotp_priv *priv; + struct nvmem_device *nvmem; + int ret; + + priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL); + if (!priv) + return -ENOMEM; + + ret = imx_scu_get_handle(&priv->nvmem_ipc); + if (ret) + return ret; + + priv->data = of_device_get_match_data(dev); + priv->dev = dev; + imx_scu_ocotp_nvmem_config.size = 4 * priv->data->nregs; + imx_scu_ocotp_nvmem_config.dev = dev; + imx_scu_ocotp_nvmem_config.priv = priv; + nvmem = devm_nvmem_register(dev, &imx_scu_ocotp_nvmem_config); + + return PTR_ERR_OR_ZERO(nvmem); +} + +static struct platform_driver imx_scu_ocotp_driver = { + .probe = imx_scu_ocotp_probe, + .driver = { + .name = "imx_scu_ocotp", + .of_match_table = imx_scu_ocotp_dt_ids, + }, +}; +module_platform_driver(imx_scu_ocotp_driver); + +MODULE_AUTHOR("Peng Fan <peng.fan@nxp.com>"); +MODULE_DESCRIPTION("i.MX8 SCU OCOTP fuse box driver"); +MODULE_LICENSE("GPL v2"); diff --git a/drivers/nvmem/imx-ocotp.c b/drivers/nvmem/imx-ocotp.c index 4cf7b61e4bf5..42d4451e7d67 100644 --- a/drivers/nvmem/imx-ocotp.c +++ b/drivers/nvmem/imx-ocotp.c @@ -1,3 +1,4 @@ +// SPDX-License-Identifier: GPL-2.0-only /* * i.MX6 OCOTP fusebox driver * @@ -9,13 +10,6 @@ * * Write support based on the fsl_otp driver, * Copyright (C) 2010-2013 Freescale Semiconductor, Inc - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License version 2 - * as published by the Free Software Foundation. - * - * http://www.opensource.org/licenses/gpl-license.html - * http://www.gnu.org/copyleft/gpl.html */ #include <linux/clk.h> @@ -45,12 +39,14 @@ #define IMX_OCOTP_ADDR_DATA2 0x0040 #define IMX_OCOTP_ADDR_DATA3 0x0050 -#define IMX_OCOTP_BM_CTRL_ADDR 0x0000007F +#define IMX_OCOTP_BM_CTRL_ADDR 0x000000FF #define IMX_OCOTP_BM_CTRL_BUSY 0x00000100 #define IMX_OCOTP_BM_CTRL_ERROR 0x00000200 #define IMX_OCOTP_BM_CTRL_REL_SHADOWS 0x00000400 -#define DEF_RELAX 20 /* > 16.5ns */ +#define TIMING_STROBE_PROG_US 10 /* Min time to blow a fuse */ +#define TIMING_STROBE_READ_NS 37 /* Min time before read */ +#define TIMING_RELAX_NS 17 #define DEF_FSOURCE 1001 /* > 1000 ns */ #define DEF_STROBE_PROG 10000 /* IPG clocks */ #define IMX_OCOTP_WR_UNLOCK 0x3E770000 @@ -182,14 +178,41 @@ static void imx_ocotp_set_imx6_timing(struct ocotp_priv *priv) * fields with timing values to match the current frequency of the * ipg_clk. OTP writes will work at maximum bus frequencies as long * as the HW_OCOTP_TIMING parameters are set correctly. + * + * Note: there are minimum timings required to ensure an OTP fuse burns + * correctly that are independent of the ipg_clk. Those values are not + * formally documented anywhere however, working from the minimum + * timings given in u-boot we can say: + * + * - Minimum STROBE_PROG time is 10 microseconds. Intuitively 10 + * microseconds feels about right as representative of a minimum time + * to physically burn out a fuse. + * + * - Minimum STROBE_READ i.e. the time to wait post OTP fuse burn before + * performing another read is 37 nanoseconds + * + * - Minimum RELAX timing is 17 nanoseconds. This final RELAX minimum + * timing is not entirely clear the documentation says "This + * count value specifies the time to add to all default timing + * parameters other than the Tpgm and Trd. It is given in number + * of ipg_clk periods." where Tpgm and Trd refer to STROBE_PROG + * and STROBE_READ respectively. What the other timing parameters + * are though, is not specified. Experience shows a zero RELAX + * value will mess up a re-load of the shadow registers post OTP + * burn. */ clk_rate = clk_get_rate(priv->clk); - relax = clk_rate / (1000000000 / DEF_RELAX) - 1; - strobe_prog = clk_rate / (1000000000 / 10000) + 2 * (DEF_RELAX + 1) - 1; - strobe_read = clk_rate / (1000000000 / 40) + 2 * (DEF_RELAX + 1) - 1; + relax = DIV_ROUND_UP(clk_rate * TIMING_RELAX_NS, 1000000000) - 1; + strobe_read = DIV_ROUND_UP(clk_rate * TIMING_STROBE_READ_NS, + 1000000000); + strobe_read += 2 * (relax + 1) - 1; + strobe_prog = DIV_ROUND_CLOSEST(clk_rate * TIMING_STROBE_PROG_US, + 1000000); + strobe_prog += 2 * (relax + 1) - 1; - timing = strobe_prog & 0x00000FFF; + timing = readl(priv->base + IMX_OCOTP_ADDR_TIMING) & 0x0FC00000; + timing |= strobe_prog & 0x00000FFF; timing |= (relax << 12) & 0x0000F000; timing |= (strobe_read << 16) & 0x003F0000; @@ -446,8 +469,14 @@ static const struct ocotp_params imx7ulp_params = { static const struct ocotp_params imx8mq_params = { .nregs = 256, - .bank_address_words = 4, - .set_timing = imx_ocotp_set_imx7_timing, + .bank_address_words = 0, + .set_timing = imx_ocotp_set_imx6_timing, +}; + +static const struct ocotp_params imx8mm_params = { + .nregs = 256, + .bank_address_words = 0, + .set_timing = imx_ocotp_set_imx6_timing, }; static const struct of_device_id imx_ocotp_dt_ids[] = { @@ -460,6 +489,7 @@ static const struct of_device_id imx_ocotp_dt_ids[] = { { .compatible = "fsl,imx6sll-ocotp", .data = &imx6sll_params }, { .compatible = "fsl,imx7ulp-ocotp", .data = &imx7ulp_params }, { .compatible = "fsl,imx8mq-ocotp", .data = &imx8mq_params }, + { .compatible = "fsl,imx8mm-ocotp", .data = &imx8mm_params }, { }, }; MODULE_DEVICE_TABLE(of, imx_ocotp_dt_ids); diff --git a/drivers/nvmem/lpc18xx_eeprom.c b/drivers/nvmem/lpc18xx_eeprom.c index 66cff1e2147a..a0275b29afd5 100644 --- a/drivers/nvmem/lpc18xx_eeprom.c +++ b/drivers/nvmem/lpc18xx_eeprom.c @@ -1,11 +1,8 @@ +// SPDX-License-Identifier: GPL-2.0-only /* * NXP LPC18xx/LPC43xx EEPROM memory NVMEM driver * * Copyright (c) 2015 Ariel D'Alessandro <ariel@vanguardiasur.com> - * - * This program is free software; you can redistribute it and/or modify it - * under the terms of the GNU General Public License version 2 as published by - * the Free Software Foundation. */ #include <linux/clk.h> diff --git a/drivers/nvmem/lpc18xx_otp.c b/drivers/nvmem/lpc18xx_otp.c index 549b5298ac4c..16c92ea85d49 100644 --- a/drivers/nvmem/lpc18xx_otp.c +++ b/drivers/nvmem/lpc18xx_otp.c @@ -1,3 +1,4 @@ +// SPDX-License-Identifier: GPL-2.0-only /* * NXP LPC18xx/43xx OTP memory NVMEM driver * @@ -6,10 +7,6 @@ * Based on the imx ocotp driver, * Copyright (c) 2015 Pengutronix, Philipp Zabel <p.zabel@pengutronix.de> * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License version 2 - * as published by the Free Software Foundation. - * * TODO: add support for writing OTP register via API in boot ROM. */ diff --git a/drivers/nvmem/meson-efuse.c b/drivers/nvmem/meson-efuse.c index 99372768446b..39bd76306033 100644 --- a/drivers/nvmem/meson-efuse.c +++ b/drivers/nvmem/meson-efuse.c @@ -1,17 +1,9 @@ +// SPDX-License-Identifier: GPL-2.0-only /* * Amlogic Meson GX eFuse Driver * * Copyright (c) 2016 Endless Computers, Inc. * Author: Carlo Caione <carlo@endlessm.com> - * - * This program is free software; you can redistribute it and/or modify it - * under the terms of version 2 of the GNU General Public License as - * published by the Free Software Foundation. - * - * This program is distributed in the hope that it will be useful, but WITHOUT - * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or - * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for - * more details. */ #include <linux/clk.h> diff --git a/drivers/nvmem/meson-mx-efuse.c b/drivers/nvmem/meson-mx-efuse.c index a085563e39e3..b9f9ce089de9 100644 --- a/drivers/nvmem/meson-mx-efuse.c +++ b/drivers/nvmem/meson-mx-efuse.c @@ -1,16 +1,8 @@ +// SPDX-License-Identifier: GPL-2.0-only /* * Amlogic Meson6, Meson8 and Meson8b eFuse Driver * * Copyright (c) 2017 Martin Blumenstingl <martin.blumenstingl@googlemail.com> - * - * This program is free software; you can redistribute it and/or modify it - * under the terms of version 2 of the GNU General Public License as - * published by the Free Software Foundation. - * - * This program is distributed in the hope that it will be useful, but WITHOUT - * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or - * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for - * more details. */ #include <linux/bitfield.h> diff --git a/drivers/nvmem/qfprom.c b/drivers/nvmem/qfprom.c index fbb1f1df6fc7..d057f1bfb2e9 100644 --- a/drivers/nvmem/qfprom.c +++ b/drivers/nvmem/qfprom.c @@ -1,14 +1,6 @@ +// SPDX-License-Identifier: GPL-2.0-only /* * Copyright (C) 2015 Srinivas Kandagatla <srinivas.kandagatla@linaro.org> - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License version 2 and - * only version 2 as published by the Free Software Foundation. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. */ #include <linux/device.h> diff --git a/drivers/nvmem/rockchip-efuse.c b/drivers/nvmem/rockchip-efuse.c index 146de9489339..e4579de5d014 100644 --- a/drivers/nvmem/rockchip-efuse.c +++ b/drivers/nvmem/rockchip-efuse.c @@ -1,17 +1,9 @@ +// SPDX-License-Identifier: GPL-2.0-only /* * Rockchip eFuse Driver * * Copyright (c) 2015 Rockchip Electronics Co. Ltd. * Author: Caesar Wang <wxt@rock-chips.com> - * - * This program is free software; you can redistribute it and/or modify it - * under the terms of version 2 of the GNU General Public License as - * published by the Free Software Foundation. - * - * This program is distributed in the hope that it will be useful, but WITHOUT - * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or - * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for - * more details. */ #include <linux/clk.h> diff --git a/drivers/nvmem/snvs_lpgpr.c b/drivers/nvmem/snvs_lpgpr.c index c050a23a9f2b..c527d26ca6ac 100644 --- a/drivers/nvmem/snvs_lpgpr.c +++ b/drivers/nvmem/snvs_lpgpr.c @@ -1,10 +1,7 @@ +// SPDX-License-Identifier: GPL-2.0-only /* * Copyright (c) 2015 Pengutronix, Steffen Trumtrar <kernel@pengutronix.de> * Copyright (c) 2017 Pengutronix, Oleksij Rempel <kernel@pengutronix.de> - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License version 2 - * as published by the Free Software Foundation. */ #include <linux/mfd/syscon.h> diff --git a/drivers/nvmem/vf610-ocotp.c b/drivers/nvmem/vf610-ocotp.c index 4662309489db..5b6cad16892f 100644 --- a/drivers/nvmem/vf610-ocotp.c +++ b/drivers/nvmem/vf610-ocotp.c @@ -1,3 +1,4 @@ +// SPDX-License-Identifier: GPL-2.0-only /* * Copyright (C) 2015 Toradex AG. * @@ -6,15 +7,6 @@ * Based on the barebox ocotp driver, * Copyright (c) 2010 Baruch Siach <baruch@tkos.co.il> * Orex Computed Radiography - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License version 2 and - * only version 2 as published by the Free Software Foundation. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. */ #include <linux/clk.h> |