diff options
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/Kconfig | 2 | ||||
| -rw-r--r-- | drivers/Makefile | 1 | ||||
| -rw-r--r-- | drivers/eeprom/Kconfig | 33 | ||||
| -rw-r--r-- | drivers/eeprom/Makefile | 9 | ||||
| -rw-r--r-- | drivers/eeprom/core.c | 517 | ||||
| -rw-r--r-- | drivers/eeprom/eeprom-sunxi-sid.c | 136 | ||||
| -rw-r--r-- | drivers/eeprom/qfprom.c | 87 | ||||
| -rw-r--r-- | drivers/misc/eeprom/Kconfig | 13 | ||||
| -rw-r--r-- | drivers/misc/eeprom/Makefile | 1 | ||||
| -rw-r--r-- | drivers/misc/eeprom/sunxi_sid.c | 156 |
10 files changed, 785 insertions, 170 deletions
diff --git a/drivers/Kconfig b/drivers/Kconfig index c0cc96bab9e7..1a0f99e474ea 100644 --- a/drivers/Kconfig +++ b/drivers/Kconfig @@ -182,4 +182,6 @@ source "drivers/thunderbolt/Kconfig" source "drivers/android/Kconfig" +source "drivers/eeprom/Kconfig" + endmenu diff --git a/drivers/Makefile b/drivers/Makefile index 527a6da8d539..57eb5b0ab9b8 100644 --- a/drivers/Makefile +++ b/drivers/Makefile @@ -165,3 +165,4 @@ obj-$(CONFIG_RAS) += ras/ obj-$(CONFIG_THUNDERBOLT) += thunderbolt/ obj-$(CONFIG_CORESIGHT) += coresight/ obj-$(CONFIG_ANDROID) += android/ +obj-$(CONFIG_EEPROM) += eeprom/ diff --git a/drivers/eeprom/Kconfig b/drivers/eeprom/Kconfig new file mode 100644 index 000000000000..b77828b175e8 --- /dev/null +++ b/drivers/eeprom/Kconfig @@ -0,0 +1,33 @@ +menuconfig EEPROM + tristate "EEPROM Support" + depends on OF + select REGMAP + help + Support for EEPROM alike devices. + + This framework is designed to provide a generic interface to EEPROM + from both the Linux Kernel and the userspace. + + If unsure, say no. + +if EEPROM + +config EEPROM_SUNXI_SID + tristate "Allwinner SoCs SID support" + depends on ARCH_SUNXI + select REGMAP_MMIO + help + This is a driver for the 'security ID' available on various Allwinner + devices. + + This driver can also be built as a module. If so, the module + will be called eprom-sunxi-sid. + +config QCOM_QFPROM + tristate "QCOM QFPROM Support" + depends on EEPROM + select REGMAP_MMIO + help + Say y here to enable QFPROM support. The QFPROM provides access + functions for QFPROM data to rest of the drivers via eeprom interface. +endif diff --git a/drivers/eeprom/Makefile b/drivers/eeprom/Makefile new file mode 100644 index 000000000000..9c1bb03a4359 --- /dev/null +++ b/drivers/eeprom/Makefile @@ -0,0 +1,9 @@ +# +# Makefile for eeprom drivers. +# + +obj-$(CONFIG_EEPROM) += core.o + +# Devices +obj-$(CONFIG_EEPROM_SUNXI_SID) += eeprom-sunxi-sid.o +obj-$(CONFIG_QCOM_QFPROM) += qfprom.o diff --git a/drivers/eeprom/core.c b/drivers/eeprom/core.c new file mode 100644 index 000000000000..b87e136972c9 --- /dev/null +++ b/drivers/eeprom/core.c @@ -0,0 +1,517 @@ +/* + * EEPROM framework core. + * + * Copyright (C) 2015 Srinivas Kandagatla <srinivas.kandagatla@linaro.org> + * Copyright (C) 2013 Maxime Ripard <maxime.ripard@free-electrons.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 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> +#include <linux/eeprom-provider.h> +#include <linux/eeprom-consumer.h> +#include <linux/export.h> +#include <linux/fs.h> +#include <linux/idr.h> +#include <linux/init.h> +#include <linux/module.h> +#include <linux/of.h> +#include <linux/slab.h> +#include <linux/uaccess.h> + +struct eeprom_device { + struct regmap *regmap; + int stride; + size_t size; + + struct module *owner; + struct device dev; + int id; + int users; +}; + +struct eeprom_cell { + struct eeprom_device *eeprom; + int nblocks; + int size; + struct eeprom_block blocks[0]; +}; + +static DEFINE_MUTEX(eeprom_mutex); +static DEFINE_IDA(eeprom_ida); + +#define to_eeprom(d) container_of(d, struct eeprom_device, dev) + +static ssize_t bin_attr_eeprom_read(struct file *filp, struct kobject *kobj, + struct bin_attribute *attr, + char *buf, loff_t offset, size_t count) +{ + struct device *dev = container_of(kobj, struct device, kobj); + struct eeprom_device *eeprom = to_eeprom(dev); + int rc; + + if (offset > eeprom->size) + return -EINVAL; + + if (offset + count > eeprom->size) + count = eeprom->size - offset; + + rc = regmap_bulk_read(eeprom->regmap, offset, + buf, count/eeprom->stride); + + if (IS_ERR_VALUE(rc)) + return rc; + + return count - count % eeprom->stride; +} + +static ssize_t bin_attr_eeprom_write(struct file *filp, struct kobject *kobj, + struct bin_attribute *attr, + char *buf, loff_t offset, size_t count) +{ + struct device *dev = container_of(kobj, struct device, kobj); + struct eeprom_device *eeprom = to_eeprom(dev); + int rc; + + if (offset > eeprom->size) + return -EINVAL; + + if (offset + count > eeprom->size) + count = eeprom->size - offset; + + rc = regmap_bulk_write(eeprom->regmap, offset, + buf, count/eeprom->stride); + + if (IS_ERR_VALUE(rc)) + return rc; + + return count - count % eeprom->stride; +} + +static struct bin_attribute bin_attr_eeprom = { + .attr = { + .name = "eeprom", + .mode = S_IWUSR | S_IRUGO, + }, + .read = bin_attr_eeprom_read, + .write = bin_attr_eeprom_write, +}; + +static struct bin_attribute *eeprom_bin_attributes[] = { + &bin_attr_eeprom, + NULL, +}; + +static const struct attribute_group eeprom_bin_group = { + .bin_attrs = eeprom_bin_attributes, +}; + +static const struct attribute_group *eeprom_dev_groups[] = { + &eeprom_bin_group, + NULL, +}; + +static void eeprom_release(struct device *dev) +{ + kfree(to_eeprom(dev)); +} + +static struct class eeprom_class = { + .name = "eeprom", + .dev_groups = eeprom_dev_groups, + .dev_release = eeprom_release, +}; + +static int of_eeprom_match(struct device *dev, const void *eeprom_np) +{ + return dev->of_node == eeprom_np; +} + +static struct eeprom_device *of_eeprom_find(struct device_node *eeprom_np) +{ + struct device *d; + + if (!eeprom_np) + return NULL; + + d = class_find_device(&eeprom_class, NULL, eeprom_np, of_eeprom_match); + + return d ? to_eeprom(d) : NULL; +} + +static int eeprom_match(struct device *dev, const void *data) +{ + return !strcmp(dev_name(dev), (const char *)data); +} + +static struct eeprom_device *eeprom_find(const char *name) +{ + struct device *d; + + d = class_find_device(&eeprom_class, NULL, (void *)name, eeprom_match); + + return d ? to_eeprom(d) : NULL; +} + +/** + * eeprom_register(): Register a eeprom device for given eeprom. + * Also creates an binary entry in /sys/class/eeprom/name-id/eeprom + * + * @eeprom: eeprom device that needs to be created + * + * The return value will be an error code on error or a zero on success. + * The eeprom_device and sysfs entery will be freed by the eeprom_unregister(). + */ + +struct eeprom_device *eeprom_register(struct eeprom_config *config) +{ + struct eeprom_device *eeprom; + int rval; + + if (!config->regmap || !config->size) { + dev_err(config->dev, "Regmap not found\n"); + return ERR_PTR(-EINVAL); + } + + eeprom = kzalloc(sizeof(*eeprom), GFP_KERNEL); + if (!eeprom) + return ERR_PTR(-ENOMEM); + + eeprom->id = ida_simple_get(&eeprom_ida, 0, 0, GFP_KERNEL); + if (eeprom->id < 0) + return ERR_PTR(eeprom->id); + + eeprom->owner = config->owner; + eeprom->regmap = config->regmap; + eeprom->stride = config->stride; + eeprom->size = config->size; + eeprom->dev.class = &eeprom_class; + eeprom->dev.parent = config->dev; + eeprom->dev.of_node = config->dev ? config->dev->of_node : NULL; + dev_set_name(&eeprom->dev, "%s%d", + config->name ? : "eeprom", config->id); + + device_initialize(&eeprom->dev); + + dev_dbg(&eeprom->dev, "Registering eeprom device %s\n", + dev_name(&eeprom->dev)); + + rval = device_add(&eeprom->dev); + if (rval) + return ERR_PTR(rval); + + return eeprom; +} +EXPORT_SYMBOL_GPL(eeprom_register); + +/** + * eeprom_unregister(): Unregister previously registered eeprom device + * + * @eeprom: Pointer to previously registered eeprom device. + * + * The return value will be an non zero on error or a zero on success. + */ +int eeprom_unregister(struct eeprom_device *eeprom) +{ + mutex_lock(&eeprom_mutex); + if (eeprom->users) { + mutex_unlock(&eeprom_mutex); + return -EBUSY; + } + mutex_unlock(&eeprom_mutex); + + device_del(&eeprom->dev); + + return 0; +} +EXPORT_SYMBOL_GPL(eeprom_unregister); + +static int eeprom_cell_sanity_check(struct eeprom_cell *cell) +{ + struct eeprom_device *eeprom = cell->eeprom; + int i; + + /* byte aligned, no need to check for stride sanity */ + if (eeprom->stride == 1) + return 0; + + for (i = 0; i < cell->nblocks; i++) { + if (!IS_ALIGNED(cell->blocks[i].offset, eeprom->stride) || + !IS_ALIGNED(cell->blocks[i].count, eeprom->stride)) { + dev_err(&eeprom->dev, + "cell unaligned to eeprom stride %d\n", + eeprom->stride); + return -EINVAL; + } + } + + return 0; +} + +static struct eeprom_cell *__eeprom_cell_get(struct device_node *cell_np, + const char *ename, + struct eeprom_block *blocks, + int nblocks) +{ + struct eeprom_cell *cell; + struct eeprom_device *eeprom = NULL; + struct property *prop; + const __be32 *vp; + u32 pv; + int i, rval; + + mutex_lock(&eeprom_mutex); + + eeprom = cell_np ? of_eeprom_find(cell_np->parent) : eeprom_find(ename); + if (!eeprom) { + mutex_unlock(&eeprom_mutex); + return ERR_PTR(-EPROBE_DEFER); + } + + eeprom->users++; + mutex_unlock(&eeprom_mutex); + + if (!try_module_get(eeprom->owner)) { + dev_err(&eeprom->dev, + "could not increase module refcount for cell %s\n", + ename); + rval = -EINVAL; + goto err_mod; + } + + if (cell_np) + nblocks = of_property_count_u32_elems(cell_np, "reg") / 2; + + cell = kzalloc(sizeof(*cell) + nblocks * sizeof(*blocks), GFP_KERNEL); + if (!cell) { + rval = -ENOMEM; + goto err_mem; + } + + cell->nblocks = nblocks; + cell->eeprom = eeprom; + cell->size = 0; + i = 0; + + if (cell_np) { + of_property_for_each_u32(cell_np, "reg", prop, vp, pv) { + cell->blocks[i].offset = pv; + vp = of_prop_next_u32(prop, vp, &pv); + cell->blocks[i].count = pv; + cell->size += pv; + i++; + } + } else { + memcpy(cell->blocks, blocks, nblocks * sizeof(*blocks)); + for (; i < nblocks; i++) + cell->size += blocks[i].count; + } + + if (IS_ERR_VALUE(eeprom_cell_sanity_check(cell))) { + rval = -EINVAL; + goto err_sanity; + } + + return cell; + +err_sanity: + kfree(cell); + +err_mem: + module_put(eeprom->owner); + +err_mod: + mutex_lock(&eeprom_mutex); + eeprom->users--; + mutex_unlock(&eeprom_mutex); + + return ERR_PTR(rval); + +} + +/** + * eeprom_cell_get(): Get eeprom cell of device form a given eeprom name + * and blocks. + * + * @ename: eeprom device name that needs to be looked-up. + * @blocks: eeprom blocks containing offset and length information. + * @nblocks: number of eeprom blocks. + * + * The return value will be an ERR_PTR() on error or a valid pointer + * to a struct eeprom_cell. The eeprom_cell will be freed by the + * eeprom_cell_put(). + */ +struct eeprom_cell *eeprom_cell_get(const char *ename, + struct eeprom_block *blocks, int nblocks) +{ + return __eeprom_cell_get(NULL, ename, blocks, nblocks); +} +EXPORT_SYMBOL_GPL(eeprom_cell_get); + +/** + * of_eeprom_cell_get(): Get eeprom cell of device form a given index + * + * @dev: Device that will be interacted with + * @index: eeprom index in eeproms property. + * + * The return value will be an ERR_PTR() on error or a valid pointer + * to a struct eeprom_cell. The eeprom_cell will be freed by the + * eeprom_cell_put(). + */ +struct eeprom_cell *of_eeprom_cell_get(struct device *dev, int index) +{ + struct device_node *cell_np; + + if (!dev || !dev->of_node) + return ERR_PTR(-EINVAL); + + cell_np = of_parse_phandle(dev->of_node, "eeproms", index); + if (!cell_np) + return ERR_PTR(-EPROBE_DEFER); + + return __eeprom_cell_get(cell_np, NULL, NULL, 0); +} +EXPORT_SYMBOL_GPL(of_eeprom_cell_get); + +/** + * of_eeprom_cell_get_byname(): Get eeprom cell of device form a given name + * + * @dev: Device that will be interacted with + * @name: eeprom name in eeprom-names property. + * + * The return value will be an ERR_PTR() on error or a valid pointer + * to a struct eeprom_cell. The eeprom_cell will be freed by the + * eeprom_cell_put(). + */ +struct eeprom_cell *of_eeprom_cell_get_byname(struct device *dev, + const char *id) +{ + int index = 0; + + if (!dev || !dev->of_node) + return ERR_PTR(-EINVAL); + + if (id) + index = of_property_match_string(dev->of_node, + "eeprom-names", + id); + return of_eeprom_cell_get(dev, index); + +} +EXPORT_SYMBOL_GPL(of_eeprom_cell_get_byname); + +/** + * eeprom_cell_put(): Release previously allocated eeprom cell. + * + * @cell: Previously allocated eeprom cell by eeprom_cell_get() + * or of_eeprom_cell_get() or of_eeprom_cell_get_byname(). + */ +void eeprom_cell_put(struct eeprom_cell *cell) +{ + struct eeprom_device *eeprom = cell->eeprom; + + mutex_lock(&eeprom_mutex); + eeprom->users--; + mutex_unlock(&eeprom_mutex); + module_put(eeprom->owner); + kfree(cell); +} +EXPORT_SYMBOL_GPL(eeprom_cell_put); + +/** + * eeprom_cell_read(): Read a given eeprom cell + * + * @cell: eeprom cell to be read. + * @len: pointer to length of cell which will be populated on successful read. + * + * The return value will be an ERR_PTR() on error or a valid pointer + * to a char * bufffer. The buffer should be freed by the consumer with a + * kfree(). + */ +char *eeprom_cell_read(struct eeprom_cell *cell, ssize_t *len) +{ + struct eeprom_device *eeprom = cell->eeprom; + char *buf; + int rc, i, offset = 0; + + if (!eeprom || !eeprom->regmap) + return ERR_PTR(-EINVAL); + + buf = kzalloc(cell->size, GFP_KERNEL); + if (!buf) + return ERR_PTR(-ENOMEM); + + for (i = 0; i < cell->nblocks; i++) { + rc = regmap_bulk_read(eeprom->regmap, cell->blocks[i].offset, + buf + offset, + cell->blocks[i].count); + + if (IS_ERR_VALUE(rc)) { + kfree(buf); + return ERR_PTR(rc); + } + offset += cell->blocks[i].count; + } + + *len = cell->size; + + return buf; +} +EXPORT_SYMBOL_GPL(eeprom_cell_read); + +/** + * eeprom_cell_write(): Write to a given eeprom cell + * + * @cell: eeprom cell to be written. + * @buf: Buffer to be written. + * @len: length of buffer to be written to eeprom cell. + * + * The return value will be an non zero on error or a zero on successful write. + */ +int eeprom_cell_write(struct eeprom_cell *cell, const char *buf, ssize_t len) +{ + struct eeprom_device *eeprom = cell->eeprom; + int i, rc, offset = 0; + + if (!eeprom || !eeprom->regmap || len != cell->size) + return -EINVAL; + + for (i = 0; i < cell->nblocks; i++) { + rc = regmap_bulk_write(eeprom->regmap, cell->blocks[i].offset, + buf + offset, + cell->blocks[i].count); + + if (IS_ERR_VALUE(rc)) + return rc; + + offset += cell->blocks[i].count; + } + + return len; +} +EXPORT_SYMBOL_GPL(eeprom_cell_write); + +static int eeprom_init(void) +{ + return class_register(&eeprom_class); +} + +static void eeprom_exit(void) +{ + class_unregister(&eeprom_class); +} + +subsys_initcall(eeprom_init); +module_exit(eeprom_exit); + +MODULE_AUTHOR("Srinivas Kandagatla <srinivas.kandagatla@linaro.org"); +MODULE_AUTHOR("Maxime Ripard <maxime.ripard@free-electrons.com"); +MODULE_DESCRIPTION("EEPROM Driver Core"); +MODULE_LICENSE("GPL v2"); diff --git a/drivers/eeprom/eeprom-sunxi-sid.c b/drivers/eeprom/eeprom-sunxi-sid.c new file mode 100644 index 000000000000..58f7d24c8386 --- /dev/null +++ b/drivers/eeprom/eeprom-sunxi-sid.c @@ -0,0 +1,136 @@ +/* + * Allwinner sunXi SoCs Security ID support. + * + * Copyright (c) 2013 Oliver Schinagl <oliver@schinagl.nl> + * Copyright (C) 2014 Maxime Ripard <maxime.ripard@free-electrons.com> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * 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> +#include <linux/eeprom-provider.h> +#include <linux/io.h> +#include <linux/module.h> +#include <linux/of_device.h> +#include <linux/platform_device.h> + +struct eeprom_sid { + void __iomem *membase; + struct eeprom_device *eeprom; +}; + +static struct eeprom_config econfig = { + .stride = 1, + .name = "sunix-sid", +}; + +/* We read the entire key, due to a 32 bit read alignment requirement. Since we + * want to return the requested byte, this results in somewhat slower code and + * uses 4 times more reads as needed but keeps code simpler. Since the SID is + * only very rarely probed, this is not really an issue. + */ +static int sunxi_sid_reg_read(void *context, + unsigned int offset, unsigned int *val) +{ + struct eeprom_sid *sid = context; + u32 sid_key; + + sid_key = ioread32be(sid->membase + round_down(offset, 4)); + sid_key >>= (offset % 4) * 8; + + *val = sid_key; + + return 0; +} + +static bool sunxi_sid_writeable_reg(struct device *dev, unsigned int reg) +{ + return false; +} + +static const struct of_device_id sunxi_sid_of_match[] = { + { .compatible = "allwinner,sun4i-a10-sid", .data = (void *)16}, + { .compatible = "allwinner,sun7i-a20-sid", .data = (void *)512}, + {/* sentinel */}, +}; +MODULE_DEVICE_TABLE(of, sunxi_sid_of_match); + +static struct regmap_config sunxi_sid_regmap_config = { + .reg_bits = 32, + .val_bits = 8, + .reg_stride = 1, + .reg_read = sunxi_sid_reg_read, + .writeable_reg = sunxi_sid_writeable_reg, +}; + +static int sunxi_sid_probe(struct platform_device *pdev) +{ + const struct of_device_id *device; + struct eeprom_sid *sid; + struct resource *res; + struct eeprom_device *eeprom; + struct device *dev = &pdev->dev; + + sid = devm_kzalloc(dev, sizeof(*sid), GFP_KERNEL); + if (!sid) + return -ENOMEM; + + + res = platform_get_resource(pdev, IORESOURCE_MEM, 0); + sid->membase = devm_ioremap_resource(dev, res); + if (IS_ERR(sid->membase)) + return PTR_ERR(sid->membase); + + device = of_match_device(sunxi_sid_of_match, dev); + if (!device) + return -ENODEV; + + sunxi_sid_regmap_config.max_register = (unsigned int)device->data - 1; + + econfig.regmap = devm_regmap_init(dev, NULL, + sid, &sunxi_sid_regmap_config); + if (IS_ERR(econfig.regmap)) + return PTR_ERR(econfig.regmap); + + econfig.dev = dev; + econfig.owner = THIS_MODULE; + econfig.size = sunxi_sid_regmap_config.max_register; + + eeprom = eeprom_register(&econfig); + if (IS_ERR(eeprom)) + return PTR_ERR(eeprom); + + platform_set_drvdata(pdev, eeprom); + + return 0; +} + +static int sunxi_sid_remove(struct platform_device *pdev) +{ + struct eeprom_device *eeprom = platform_get_drvdata(pdev); + + return eeprom_unregister(eeprom); +} + +static struct platform_driver sunxi_sid_driver = { + .probe = sunxi_sid_probe, + .remove = sunxi_sid_remove, + .driver = { + .name = "eeprom-sunxi-sid", + .of_match_table = sunxi_sid_of_match, + }, +}; +module_platform_driver(sunxi_sid_driver); + +MODULE_AUTHOR("Oliver Schinagl <oliver@schinagl.nl>"); +MODULE_DESCRIPTION("Allwinner sunxi security id driver"); +MODULE_LICENSE("GPL"); diff --git a/drivers/eeprom/qfprom.c b/drivers/eeprom/qfprom.c new file mode 100644 index 000000000000..7d9e5e9641b1 --- /dev/null +++ b/drivers/eeprom/qfprom.c @@ -0,0 +1,87 @@ +/* + * 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> +#include <linux/module.h> +#include <linux/err.h> +#include <linux/of.h> +#include <linux/platform_device.h> +#include <linux/eeprom-provider.h> + +static struct regmap_config qfprom_regmap_config = { + .reg_bits = 32, + .val_bits = 8, + .reg_stride = 1, +}; + +static struct eeprom_config econfig = { + .stride = 1, + .name = "qfprom", +}; + +static int qfprom_remove(struct platform_device *pdev) +{ + struct eeprom_device *eeprom = platform_get_drvdata(pdev); + + return eeprom_unregister(eeprom); +} + +static int qfprom_probe(struct platform_device *pdev) +{ + struct resource *res; + void __iomem *base; + struct device *dev = &pdev->dev; + struct eeprom_device *eeprom; + + res = platform_get_resource(pdev, IORESOURCE_MEM, 0); + base = devm_ioremap_resource(dev, res); + if (IS_ERR(base)) + return PTR_ERR(base); + + qfprom_regmap_config.max_register = resource_size(res) - 1; + + econfig.regmap = devm_regmap_init_mmio(dev, base, + &qfprom_regmap_config); + if (IS_ERR(econfig.regmap)) { + dev_err(dev, "regmap init failed\n"); + return PTR_ERR(econfig.regmap); + } + econfig.owner = THIS_MODULE; + econfig.dev = dev; + econfig.size = resource_size(res) - 1; + eeprom = eeprom_register(&econfig); + if (IS_ERR(eeprom)) + return PTR_ERR(eeprom); + + platform_set_drvdata(pdev, eeprom); + return 0; +} + +static const struct of_device_id qfprom_of_match[] = { + { .compatible = "qcom,qfprom"}, + {/* sentinel */}, +}; +MODULE_DEVICE_TABLE(of, qfprom_of_match); + +static struct platform_driver qfprom_driver = { + .probe = qfprom_probe, + .remove = qfprom_remove, + .driver = { + .name = "qcom,qfprom", + .of_match_table = qfprom_of_match, + }, +}; +module_platform_driver(qfprom_driver); +MODULE_AUTHOR("Srinivas Kandagatla <srinivas.kandagatla@linaro.org>"); +MODULE_DESCRIPTION("Qualcomm QFPROM driver"); +MODULE_LICENSE("GPL v2"); diff --git a/drivers/misc/eeprom/Kconfig b/drivers/misc/eeprom/Kconfig index 9536852fd4c6..04f2e1fa9dd1 100644 --- a/drivers/misc/eeprom/Kconfig +++ b/drivers/misc/eeprom/Kconfig @@ -96,17 +96,4 @@ config EEPROM_DIGSY_MTC_CFG If unsure, say N. -config EEPROM_SUNXI_SID - tristate "Allwinner sunxi security ID support" - depends on ARCH_SUNXI && SYSFS - help - This is a driver for the 'security ID' available on various Allwinner - devices. - - Due to the potential risks involved with changing e-fuses, - this driver is read-only. - - This driver can also be built as a module. If so, the module - will be called sunxi_sid. - endmenu diff --git a/drivers/misc/eeprom/Makefile b/drivers/misc/eeprom/Makefile index 9507aec95e94..fc1e81d29267 100644 --- a/drivers/misc/eeprom/Makefile +++ b/drivers/misc/eeprom/Makefile @@ -4,5 +4,4 @@ obj-$(CONFIG_EEPROM_LEGACY) += eeprom.o obj-$(CONFIG_EEPROM_MAX6875) += max6875.o obj-$(CONFIG_EEPROM_93CX6) += eeprom_93cx6.o obj-$(CONFIG_EEPROM_93XX46) += eeprom_93xx46.o -obj-$(CONFIG_EEPROM_SUNXI_SID) += sunxi_sid.o obj-$(CONFIG_EEPROM_DIGSY_MTC_CFG) += digsy_mtc_eeprom.o diff --git a/drivers/misc/eeprom/sunxi_sid.c b/drivers/misc/eeprom/sunxi_sid.c deleted file mode 100644 index 8385177ff32b..000000000000 --- a/drivers/misc/eeprom/sunxi_sid.c +++ /dev/null @@ -1,156 +0,0 @@ -/* - * Copyright (c) 2013 Oliver Schinagl <oliver@schinagl.nl> - * http://www.linux-sunxi.org - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; either version 2 of the License, or - * (at your option) any later version. - * - * 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. - * - * This driver exposes the Allwinner security ID, efuses exported in byte- - * sized chunks. - */ - -#include <linux/compiler.h> -#include <linux/device.h> -#include <linux/err.h> -#include <linux/export.h> -#include <linux/fs.h> -#include <linux/io.h> -#include <linux/kernel.h> -#include <linux/kobject.h> -#include <linux/module.h> -#include <linux/of_device.h> -#include <linux/platform_device.h> -#include <linux/random.h> -#include <linux/slab.h> -#include <linux/stat.h> -#include <linux/sysfs.h> -#include <linux/types.h> - -#define DRV_NAME "sunxi-sid" - -struct sunxi_sid_data { - void __iomem *reg_base; - unsigned int keysize; -}; - -/* We read the entire key, due to a 32 bit read alignment requirement. Since we - * want to return the requested byte, this results in somewhat slower code and - * uses 4 times more reads as needed but keeps code simpler. Since the SID is - * only very rarely probed, this is not really an issue. - */ -static u8 sunxi_sid_read_byte(const struct sunxi_sid_data *sid_data, - const unsigned int offset) -{ - u32 sid_key; - - if (offset >= sid_data->keysize) - return 0; - - sid_key = ioread32be(sid_data->reg_base + round_down(offset, 4)); - sid_key >>= (offset % 4) * 8; - - return sid_key; /* Only return the last byte */ -} - -static ssize_t sid_read(struct file *fd, struct kobject *kobj, - struct bin_attribute *attr, char *buf, - loff_t pos, size_t size) -{ - struct platform_device *pdev; - struct sunxi_sid_data *sid_data; - int i; - - pdev = to_platform_device(kobj_to_dev(kobj)); - sid_data = platform_get_drvdata(pdev); - - if (pos < 0 || pos >= sid_data->keysize) - return 0; - if (size > sid_data->keysize - pos) - size = sid_data->keysize - pos; - - for (i = 0; i < size; i++) - buf[i] = sunxi_sid_read_byte(sid_data, pos + i); - - return i; -} - -static struct bin_attribute sid_bin_attr = { - .attr = { .name = "eeprom", .mode = S_IRUGO, }, - .read = sid_read, -}; - -static int sunxi_sid_remove(struct platform_device *pdev) -{ - device_remove_bin_file(&pdev->dev, &sid_bin_attr); - dev_dbg(&pdev->dev, "driver unloaded\n"); - - return 0; -} - -static const struct of_device_id sunxi_sid_of_match[] = { - { .compatible = "allwinner,sun4i-a10-sid", .data = (void *)16}, - { .compatible = "allwinner,sun7i-a20-sid", .data = (void *)512}, - {/* sentinel */}, -}; -MODULE_DEVICE_TABLE(of, sunxi_sid_of_match); - -static int sunxi_sid_probe(struct platform_device *pdev) -{ - struct sunxi_sid_data *sid_data; - struct resource *res; - const struct of_device_id *of_dev_id; - u8 *entropy; - unsigned int i; - - sid_data = devm_kzalloc(&pdev->dev, sizeof(struct sunxi_sid_data), - GFP_KERNEL); - if (!sid_data) - return -ENOMEM; - - res = platform_get_resource(pdev, IORESOURCE_MEM, 0); - sid_data->reg_base = devm_ioremap_resource(&pdev->dev, res); - if (IS_ERR(sid_data->reg_base)) - return PTR_ERR(sid_data->reg_base); - - of_dev_id = of_match_device(sunxi_sid_of_match, &pdev->dev); - if (!of_dev_id) - return -ENODEV; - sid_data->keysize = (int)of_dev_id->data; - - platform_set_drvdata(pdev, sid_data); - - sid_bin_attr.size = sid_data->keysize; - if (device_create_bin_file(&pdev->dev, &sid_bin_attr)) - return -ENODEV; - - entropy = kzalloc(sizeof(u8) * sid_data->keysize, GFP_KERNEL); - for (i = 0; i < sid_data->keysize; i++) - entropy[i] = sunxi_sid_read_byte(sid_data, i); - add_device_randomness(entropy, sid_data->keysize); - kfree(entropy); - - dev_dbg(&pdev->dev, "loaded\n"); - - return 0; -} - -static struct platform_driver sunxi_sid_driver = { - .probe = sunxi_sid_probe, - .remove = sunxi_sid_remove, - .driver = { - .name = DRV_NAME, - .of_match_table = sunxi_sid_of_match, - }, -}; -module_platform_driver(sunxi_sid_driver); - -MODULE_AUTHOR("Oliver Schinagl <oliver@schinagl.nl>"); -MODULE_DESCRIPTION("Allwinner sunxi security id driver"); -MODULE_LICENSE("GPL"); |