diff options
Diffstat (limited to 'drivers/mtd/devices')
| -rw-r--r-- | drivers/mtd/devices/docg3.c | 5 | ||||
| -rw-r--r-- | drivers/mtd/devices/phram.c | 54 | ||||
| -rw-r--r-- | drivers/mtd/devices/powernv_flash.c | 5 |
3 files changed, 41 insertions, 23 deletions
diff --git a/drivers/mtd/devices/docg3.c b/drivers/mtd/devices/docg3.c index a030792115bc..5b0ae5ddad74 100644 --- a/drivers/mtd/devices/docg3.c +++ b/drivers/mtd/devices/docg3.c @@ -816,7 +816,7 @@ static void doc_read_page_finish(struct docg3 *docg3) /** * calc_block_sector - Calculate blocks, pages and ofs. - + * * @from: offset in flash * @block0: first plane block index calculated * @block1: second plane block index calculated @@ -1783,10 +1783,9 @@ static int __init doc_set_driver_info(int chip_id, struct mtd_info *mtd) /** * doc_probe_device - Check if a device is available - * @base: the io space where the device is probed + * @cascade: the cascade of chips this devices will belong to * @floor: the floor of the probed device * @dev: the device - * @cascade: the cascade of chips this devices will belong to * * Checks whether a device at the specified IO range, and floor is available. * diff --git a/drivers/mtd/devices/phram.c b/drivers/mtd/devices/phram.c index 087b5e86d1bf..cfd170946ba4 100644 --- a/drivers/mtd/devices/phram.c +++ b/drivers/mtd/devices/phram.c @@ -1,19 +1,19 @@ // SPDX-License-Identifier: GPL-2.0-only -/** +/* * Copyright (c) ???? Jochen Schäuble <psionic@psionic.de> * Copyright (c) 2003-2004 Joern Engel <joern@wh.fh-wedel.de> * * Usage: * * one commend line parameter per device, each in the form: - * phram=<name>,<start>,<len> + * phram=<name>,<start>,<len>[,<erasesize>] * <name> may be up to 63 characters. - * <start> and <len> can be octal, decimal or hexadecimal. If followed + * <start>, <len>, and <erasesize> can be octal, decimal or hexadecimal. If followed * by "ki", "Mi" or "Gi", the numbers will be interpreted as kilo, mega or - * gigabytes. + * gigabytes. <erasesize> is optional and defaults to PAGE_SIZE. * * Example: - * phram=swap,64Mi,128Mi phram=test,900Mi,1Mi + * phram=swap,64Mi,128Mi phram=test,900Mi,1Mi,64Ki */ #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt @@ -26,6 +26,7 @@ #include <linux/moduleparam.h> #include <linux/slab.h> #include <linux/mtd/mtd.h> +#include <asm/div64.h> struct phram_mtd_list { struct mtd_info mtd; @@ -88,7 +89,7 @@ static void unregister_devices(void) } } -static int register_device(char *name, phys_addr_t start, size_t len) +static int register_device(char *name, phys_addr_t start, size_t len, uint32_t erasesize) { struct phram_mtd_list *new; int ret = -ENOMEM; @@ -115,7 +116,7 @@ static int register_device(char *name, phys_addr_t start, size_t len) new->mtd._write = phram_write; new->mtd.owner = THIS_MODULE; new->mtd.type = MTD_RAM; - new->mtd.erasesize = PAGE_SIZE; + new->mtd.erasesize = erasesize; new->mtd.writesize = 1; ret = -EAGAIN; @@ -204,22 +205,23 @@ static inline void kill_final_newline(char *str) static int phram_init_called; /* * This shall contain the module parameter if any. It is of the form: - * - phram=<device>,<address>,<size> for module case - * - phram.phram=<device>,<address>,<size> for built-in case - * We leave 64 bytes for the device name, 20 for the address and 20 for the - * size. - * Example: phram.phram=rootfs,0xa0000000,512Mi + * - phram=<device>,<address>,<size>[,<erasesize>] for module case + * - phram.phram=<device>,<address>,<size>[,<erasesize>] for built-in case + * We leave 64 bytes for the device name, 20 for the address , 20 for the + * size and 20 for the erasesize. + * Example: phram.phram=rootfs,0xa0000000,512Mi,65536 */ -static char phram_paramline[64 + 20 + 20]; +static char phram_paramline[64 + 20 + 20 + 20]; #endif static int phram_setup(const char *val) { - char buf[64 + 20 + 20], *str = buf; - char *token[3]; + char buf[64 + 20 + 20 + 20], *str = buf; + char *token[4]; char *name; uint64_t start; uint64_t len; + uint64_t erasesize = PAGE_SIZE; int i, ret; if (strnlen(val, sizeof(buf)) >= sizeof(buf)) @@ -228,7 +230,7 @@ static int phram_setup(const char *val) strcpy(str, val); kill_final_newline(str); - for (i = 0; i < 3; i++) + for (i = 0; i < 4; i++) token[i] = strsep(&str, ","); if (str) @@ -253,11 +255,25 @@ static int phram_setup(const char *val) goto error; } - ret = register_device(name, start, len); + if (token[3]) { + ret = parse_num64(&erasesize, token[3]); + if (ret) { + parse_err("illegal erasesize\n"); + goto error; + } + } + + if (len == 0 || erasesize == 0 || erasesize > len + || erasesize > UINT_MAX || do_div(len, (uint32_t)erasesize) != 0) { + parse_err("illegal erasesize or len\n"); + goto error; + } + + ret = register_device(name, start, len, (uint32_t)erasesize); if (ret) goto error; - pr_info("%s device: %#llx at %#llx\n", name, len, start); + pr_info("%s device: %#llx at %#llx for erasesize %#llx\n", name, len, start, erasesize); return 0; error: @@ -298,7 +314,7 @@ static int phram_param_call(const char *val, const struct kernel_param *kp) } module_param_call(phram, phram_param_call, NULL, NULL, 0200); -MODULE_PARM_DESC(phram, "Memory region to map. \"phram=<name>,<start>,<length>\""); +MODULE_PARM_DESC(phram, "Memory region to map. \"phram=<name>,<start>,<length>[,<erasesize>]\""); static int __init init_phram(void) diff --git a/drivers/mtd/devices/powernv_flash.c b/drivers/mtd/devices/powernv_flash.c index 0b757d9ba2f6..6950a8764815 100644 --- a/drivers/mtd/devices/powernv_flash.c +++ b/drivers/mtd/devices/powernv_flash.c @@ -126,6 +126,7 @@ out: } /** + * powernv_flash_read * @mtd: the device * @from: the offset to read from * @len: the number of bytes to read @@ -142,6 +143,7 @@ static int powernv_flash_read(struct mtd_info *mtd, loff_t from, size_t len, } /** + * powernv_flash_write * @mtd: the device * @to: the offset to write to * @len: the number of bytes to write @@ -158,6 +160,7 @@ static int powernv_flash_write(struct mtd_info *mtd, loff_t to, size_t len, } /** + * powernv_flash_erase * @mtd: the device * @erase: the erase info * Returns 0 if erase successful or -ERRNO if an error occurred @@ -176,7 +179,7 @@ static int powernv_flash_erase(struct mtd_info *mtd, struct erase_info *erase) /** * powernv_flash_set_driver_info - Fill the mtd_info structure and docg3 - * structure @pdev: The platform device + * @dev: The device structure * @mtd: The structure to fill */ static int powernv_flash_set_driver_info(struct device *dev, |