used internally by the CFI drivers.
config MTD_PHYSMAP_OF
- tristate "Memory device in physical memory map based on OF description"
- depends on OF && (MTD_CFI || MTD_JEDECPROBE || MTD_ROM || MTD_RAM)
+ bool "Memory device in physical memory map based on OF description"
+ depends on OF && MTD_PHYSMAP
help
This provides a 'mapping' driver which allows the NOR Flash, ROM
and RAM driver code to communicate with chips which are mapped
obj-$(CONFIG_MTD_TSUNAMI) += tsunami_flash.o
obj-$(CONFIG_MTD_PXA2XX) += pxa2xx-flash.o
physmap-objs-y += physmap-core.o
+physmap-objs-$(CONFIG_MTD_PHYSMAP_OF_VERSATILE) += physmap_of_versatile.o
+physmap-objs-$(CONFIG_MTD_PHYSMAP_OF_GEMINI) += physmap_of_gemini.o
physmap-objs := $(physmap-objs-y)
obj-$(CONFIG_MTD_PHYSMAP) += physmap.o
-physmap_of-objs-y += physmap_of_core.o
-physmap_of-objs-$(CONFIG_MTD_PHYSMAP_OF_VERSATILE) += physmap_of_versatile.o
-physmap_of-objs-$(CONFIG_MTD_PHYSMAP_OF_GEMINI) += physmap_of_gemini.o
-physmap_of-objs := $(physmap_of-objs-y)
-obj-$(CONFIG_MTD_PHYSMAP_OF) += physmap_of.o
obj-$(CONFIG_MTD_PISMO) += pismo.o
obj-$(CONFIG_MTD_PMC_MSP_EVM) += pmcmsp-flash.o
obj-$(CONFIG_MTD_PCMCIA) += pcmciamtd.o
* Author: Jun Sun, jsun@mvista.com or jsun@junsun.net
*
* 031022 - [jsun] add run-time configure and partition setup
+ *
+ * Device tree support:
+ * Copyright (C) 2006 MontaVista Software Inc.
+ * Author: Vitaly Wool <vwool@ru.mvista.com>
+ *
+ * Revised to handle newer style flash binding by:
+ * Copyright (C) 2007 David Gibson, IBM Corporation.
*/
#include <linux/module.h>
#include <linux/mtd/partitions.h>
#include <linux/mtd/physmap.h>
#include <linux/mtd/concat.h>
+#include <linux/mtd/cfi_endian.h>
#include <linux/io.h>
+#include <linux/of_device.h>
+
+#include "physmap_of_gemini.h"
+#include "physmap_of_versatile.h"
struct physmap_flash_info {
unsigned int nmaps;
struct map_info *maps;
spinlock_t vpp_lock;
int vpp_refcnt;
+ const char *probe_type;
+ const char * const *part_types;
+ unsigned int nparts;
+ const struct mtd_partition *parts;
};
static int physmap_flash_remove(struct platform_device *dev)
if (!info)
return 0;
- physmap_data = dev_get_platdata(&dev->dev);
-
if (info->cmtd) {
err = mtd_device_unregister(info->cmtd);
if (err)
map_destroy(info->mtds[i]);
}
- if (physmap_data->exit)
+ physmap_data = dev_get_platdata(&dev->dev);
+ if (physmap_data && physmap_data->exit)
physmap_data->exit(dev);
return 0;
spin_unlock_irqrestore(&info->vpp_lock, flags);
}
+#if IS_ENABLED(CONFIG_MTD_PHYSMAP_OF)
+static const struct of_device_id of_flash_match[] = {
+ {
+ .compatible = "cfi-flash",
+ .data = "cfi_probe",
+ },
+ {
+ /*
+ * FIXME: JEDEC chips can't be safely and reliably
+ * probed, although the mtd code gets it right in
+ * practice most of the time. We should use the
+ * vendor and device ids specified by the binding to
+ * bypass the heuristic probe code, but the mtd layer
+ * provides, at present, no interface for doing so
+ * :(.
+ */
+ .compatible = "jedec-flash",
+ .data = "jedec_probe",
+ },
+ {
+ .compatible = "mtd-ram",
+ .data = "map_ram",
+ },
+ {
+ .compatible = "mtd-rom",
+ .data = "map_rom",
+ },
+ {
+ .type = "rom",
+ .compatible = "direct-mapped"
+ },
+ { /* sentinel */ },
+};
+MODULE_DEVICE_TABLE(of, of_flash_match);
+
+static const char * const of_default_part_probes[] = {
+ "cmdlinepart", "RedBoot", "ofpart", "ofoldpart", NULL
+};
+
+static const char * const *of_get_part_probes(struct platform_device *dev)
+{
+ struct device_node *dp = dev->dev.of_node;
+ const char **res;
+ int count;
+
+ count = of_property_count_strings(dp, "linux,part-probe");
+ if (count < 0)
+ return of_default_part_probes;
+
+ res = devm_kcalloc(&dev->dev, count + 1, sizeof(*res), GFP_KERNEL);
+ if (!res)
+ return NULL;
+
+ count = of_property_read_string_array(dp, "linux,part-probe", res,
+ count);
+ if (count < 0)
+ return NULL;
+
+ return res;
+}
+
+static const char *of_select_probe_type(struct platform_device *dev)
+{
+ struct device_node *dp = dev->dev.of_node;
+ const struct of_device_id *match;
+ const char *probe_type;
+
+ match = of_match_device(of_flash_match, &dev->dev);
+ probe_type = match->data;
+ if (probe_type)
+ return probe_type;
+
+ dev_warn(&dev->dev,
+ "Device tree uses obsolete \"direct-mapped\" flash binding\n");
+
+ of_property_read_string(dp, "probe-type", &probe_type);
+ if (!probe_type)
+ return NULL;
+
+ if (!strcmp(probe_type, "CFI")) {
+ probe_type = "cfi_probe";
+ } else if (!strcmp(probe_type, "JEDEC")) {
+ probe_type = "jedec_probe";
+ } else if (!strcmp(probe_type, "ROM")) {
+ probe_type = "map_rom";
+ } else {
+ dev_warn(&dev->dev,
+ "obsolete_probe: don't know probe type '%s', mapping as rom\n",
+ probe_type);
+ probe_type = "map_rom";
+ }
+
+ return probe_type;
+}
+
+static int physmap_flash_of_init(struct platform_device *dev)
+{
+ struct physmap_flash_info *info = platform_get_drvdata(dev);
+ struct device_node *dp = dev->dev.of_node;
+ const char *mtd_name = NULL;
+ int err, swap = 0;
+ bool map_indirect;
+ unsigned int i;
+ u32 bankwidth;
+
+ if (!dp)
+ return -EINVAL;
+
+ info->probe_type = of_select_probe_type(dev);
+
+ info->part_types = of_get_part_probes(dev);
+ if (!info->part_types)
+ return -ENOMEM;
+
+ of_property_read_string(dp, "linux,mtd-name", &mtd_name);
+
+ map_indirect = of_property_read_bool(dp, "no-unaligned-direct-access");
+
+ err = of_property_read_u32(dp, "bank-width", &bankwidth);
+ if (err) {
+ dev_err(&dev->dev, "Can't get bank width from device tree\n");
+ return err;
+ }
+
+ if (of_property_read_bool(dp, "big-endian"))
+ swap = CFI_BIG_ENDIAN;
+ else if (of_property_read_bool(dp, "little-endian"))
+ swap = CFI_LITTLE_ENDIAN;
+
+ for (i = 0; i < info->nmaps; i++) {
+ info->maps[i].name = mtd_name;
+ info->maps[i].swap = swap;
+ info->maps[i].bankwidth = bankwidth;
+ info->maps[i].device_node = dp;
+
+ err = of_flash_probe_gemini(dev, dp, &info->maps[i]);
+ if (err)
+ return err;
+
+ err = of_flash_probe_versatile(dev, dp, &info->maps[i]);
+ if (err)
+ return err;
+
+ /*
+ * On some platforms (e.g. MPC5200) a direct 1:1 mapping
+ * may cause problems with JFFS2 usage, as the local bus (LPB)
+ * doesn't support unaligned accesses as implemented in the
+ * JFFS2 code via memcpy(). By setting NO_XIP, the
+ * flash will not be exposed directly to the MTD users
+ * (e.g. JFFS2) any more.
+ */
+ if (map_indirect)
+ info->maps[i].phys = NO_XIP;
+ }
+
+ return 0;
+}
+#else /* IS_ENABLED(CONFIG_MTD_PHYSMAP_OF) */
+#define of_flash_match NULL
+
+static int physmap_flash_of_init(struct platform_device *dev)
+{
+ return -ENOTSUPP;
+}
+#endif /* IS_ENABLED(CONFIG_MTD_PHYSMAP_OF) */
+
static const char * const rom_probe_types[] = {
"cfi_probe", "jedec_probe", "qinfo_probe", "map_rom", NULL
};
"cmdlinepart", "RedBoot", "afs", NULL
};
-static int physmap_flash_probe(struct platform_device *dev)
+static int physmap_flash_pdata_init(struct platform_device *dev)
{
+ struct physmap_flash_info *info = platform_get_drvdata(dev);
struct physmap_flash_data *physmap_data;
+ unsigned int i;
+ int err;
+
+ physmap_data = dev_get_platdata(&dev->dev);
+ if (!physmap_data)
+ return -EINVAL;
+
+ info->probe_type = physmap_data->probe_type;
+ info->part_types = physmap_data->part_probe_types ? : part_probe_types;
+ info->parts = physmap_data->parts;
+ info->nparts = physmap_data->nr_parts;
+
+ if (physmap_data->init) {
+ err = physmap_data->init(dev);
+ if (err)
+ return err;
+ }
+
+ for (i = 0; i < info->nmaps; i++) {
+ info->maps[i].bankwidth = physmap_data->width;
+ info->maps[i].pfow_base = physmap_data->pfow_base;
+ info->maps[i].set_vpp = physmap_set_vpp;
+ }
+
+ return 0;
+}
+
+static int physmap_flash_probe(struct platform_device *dev)
+{
struct physmap_flash_info *info;
const char * const *probe_type;
- const char * const *part_types;
int err = 0;
int i;
- physmap_data = dev_get_platdata(&dev->dev);
- if (!physmap_data)
- return -ENODEV;
+ if (!dev->dev.of_node && !dev_get_platdata(&dev->dev))
+ return -EINVAL;
info = devm_kzalloc(&dev->dev, sizeof(*info), GFP_KERNEL);
if (!info)
if (!info->mtds)
return -ENOMEM;
- if (physmap_data->init) {
- err = physmap_data->init(dev);
- if (err)
- goto err_out;
- }
-
platform_set_drvdata(dev, info);
+ if (dev->dev.of_node)
+ err = physmap_flash_of_init(dev);
+ else
+ err = physmap_flash_pdata_init(dev);
+
+ if (err)
+ return err;
+
for (i = 0; i < info->nmaps; i++) {
struct resource *res;
res);
info->maps[i].name = dev_name(&dev->dev);
- info->maps[i].phys = res->start;
+
+ if (!info->maps[i].phys)
+ info->maps[i].phys = res->start;
+
info->maps[i].size = resource_size(res);
- info->maps[i].bankwidth = physmap_data->width;
- info->maps[i].set_vpp = physmap_set_vpp;
- info->maps[i].pfow_base = physmap_data->pfow_base;
info->maps[i].map_priv_1 = (unsigned long)dev;
simple_map_init(&info->maps[i]);
probe_type = rom_probe_types;
- if (!physmap_data->probe_type) {
+ if (!info->probe_type) {
for (; !info->mtds[i] && *probe_type; probe_type++)
info->mtds[i] = do_map_probe(*probe_type,
&info->maps[i]);
} else {
- info->mtds[i] = do_map_probe(physmap_data->probe_type,
+ info->mtds[i] = do_map_probe(info->probe_type,
&info->maps[i]);
}
spin_lock_init(&info->vpp_lock);
- part_types = physmap_data->part_probe_types ? : part_probe_types;
-
- err = mtd_device_parse_register(info->cmtd, part_types, NULL,
- physmap_data->parts,
- physmap_data->nr_parts);
+ mtd_set_of_node(info->cmtd, dev->dev.of_node);
+ err = mtd_device_parse_register(info->cmtd, info->part_types, NULL,
+ info->parts, info->nparts);
if (err)
goto err_out;
.shutdown = physmap_flash_shutdown,
.driver = {
.name = "physmap-flash",
+ .of_match_table = of_flash_match,
},
};
MODULE_LICENSE("GPL");
MODULE_AUTHOR("David Woodhouse <dwmw2@infradead.org>");
+MODULE_AUTHOR("Vitaly Wool <vwool@ru.mvista.com>");
MODULE_DESCRIPTION("Generic configurable MTD map driver");
/* legacy platform drivers can't hotplug or coldplg */
+++ /dev/null
-/*
- * Flash mappings described by the OF (or flattened) device tree
- *
- * Copyright (C) 2006 MontaVista Software Inc.
- * Author: Vitaly Wool <vwool@ru.mvista.com>
- *
- * Revised to handle newer style flash binding by:
- * Copyright (C) 2007 David Gibson, IBM Corporation.
- *
- * 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.
- */
-
-#include <linux/module.h>
-#include <linux/types.h>
-#include <linux/device.h>
-#include <linux/mtd/mtd.h>
-#include <linux/mtd/map.h>
-#include <linux/mtd/partitions.h>
-#include <linux/mtd/concat.h>
-#include <linux/mtd/cfi_endian.h>
-#include <linux/of.h>
-#include <linux/of_address.h>
-#include <linux/of_platform.h>
-#include <linux/slab.h>
-#include "physmap_of_gemini.h"
-#include "physmap_of_versatile.h"
-
-struct of_flash_list {
- struct mtd_info *mtd;
- struct map_info map;
-};
-
-struct of_flash {
- struct mtd_info *cmtd;
- int list_size; /* number of elements in of_flash_list */
- struct of_flash_list list[0];
-};
-
-static int of_flash_remove(struct platform_device *dev)
-{
- struct of_flash *info;
- int i;
-
- info = dev_get_drvdata(&dev->dev);
- if (!info)
- return 0;
- dev_set_drvdata(&dev->dev, NULL);
-
- if (info->cmtd) {
- mtd_device_unregister(info->cmtd);
- if (info->cmtd != info->list[0].mtd)
- mtd_concat_destroy(info->cmtd);
- }
-
- for (i = 0; i < info->list_size; i++)
- if (info->list[i].mtd)
- map_destroy(info->list[i].mtd);
-
- return 0;
-}
-
-static const char * const rom_probe_types[] = {
- "cfi_probe", "jedec_probe", "map_rom" };
-
-/* Helper function to handle probing of the obsolete "direct-mapped"
- * compatible binding, which has an extra "probe-type" property
- * describing the type of flash probe necessary. */
-static struct mtd_info *obsolete_probe(struct platform_device *dev,
- struct map_info *map)
-{
- struct device_node *dp = dev->dev.of_node;
- const char *of_probe;
- struct mtd_info *mtd;
- int i;
-
- dev_warn(&dev->dev, "Device tree uses obsolete \"direct-mapped\" "
- "flash binding\n");
-
- of_probe = of_get_property(dp, "probe-type", NULL);
- if (!of_probe) {
- for (i = 0; i < ARRAY_SIZE(rom_probe_types); i++) {
- mtd = do_map_probe(rom_probe_types[i], map);
- if (mtd)
- return mtd;
- }
- return NULL;
- } else if (strcmp(of_probe, "CFI") == 0) {
- return do_map_probe("cfi_probe", map);
- } else if (strcmp(of_probe, "JEDEC") == 0) {
- return do_map_probe("jedec_probe", map);
- } else {
- if (strcmp(of_probe, "ROM") != 0)
- dev_warn(&dev->dev, "obsolete_probe: don't know probe "
- "type '%s', mapping as rom\n", of_probe);
- return do_map_probe("map_rom", map);
- }
-}
-
-/* When partitions are set we look for a linux,part-probe property which
- specifies the list of partition probers to use. If none is given then the
- default is use. These take precedence over other device tree
- information. */
-static const char * const part_probe_types_def[] = {
- "cmdlinepart", "RedBoot", "ofpart", "ofoldpart", NULL };
-
-static const char * const *of_get_probes(struct device_node *dp)
-{
- const char **res;
- int count;
-
- count = of_property_count_strings(dp, "linux,part-probe");
- if (count < 0)
- return part_probe_types_def;
-
- res = kcalloc(count + 1, sizeof(*res), GFP_KERNEL);
- if (!res)
- return NULL;
-
- count = of_property_read_string_array(dp, "linux,part-probe", res,
- count);
- if (count < 0)
- return NULL;
-
- return res;
-}
-
-static void of_free_probes(const char * const *probes)
-{
- if (probes != part_probe_types_def)
- kfree(probes);
-}
-
-static const struct of_device_id of_flash_match[];
-static int of_flash_probe(struct platform_device *dev)
-{
- const char * const *part_probe_types;
- const struct of_device_id *match;
- struct device_node *dp = dev->dev.of_node;
- struct resource res;
- struct of_flash *info;
- const char *probe_type;
- const __be32 *width;
- int err;
- int i;
- int count;
- const __be32 *p;
- int reg_tuple_size;
- struct mtd_info **mtd_list = NULL;
- resource_size_t res_size;
- bool map_indirect;
- const char *mtd_name = NULL;
-
- match = of_match_device(of_flash_match, &dev->dev);
- if (!match)
- return -EINVAL;
- probe_type = match->data;
-
- reg_tuple_size = (of_n_addr_cells(dp) + of_n_size_cells(dp)) * sizeof(u32);
-
- of_property_read_string(dp, "linux,mtd-name", &mtd_name);
-
- /*
- * Get number of "reg" tuples. Scan for MTD devices on area's
- * described by each "reg" region. This makes it possible (including
- * the concat support) to support the Intel P30 48F4400 chips which
- * consists internally of 2 non-identical NOR chips on one die.
- */
- p = of_get_property(dp, "reg", &count);
- if (!p || count % reg_tuple_size != 0) {
- dev_err(&dev->dev, "Malformed reg property on %pOF\n",
- dev->dev.of_node);
- err = -EINVAL;
- goto err_flash_remove;
- }
- count /= reg_tuple_size;
-
- map_indirect = of_property_read_bool(dp, "no-unaligned-direct-access");
-
- err = -ENOMEM;
- info = devm_kzalloc(&dev->dev,
- sizeof(struct of_flash) +
- sizeof(struct of_flash_list) * count, GFP_KERNEL);
- if (!info)
- goto err_flash_remove;
-
- dev_set_drvdata(&dev->dev, info);
-
- mtd_list = kcalloc(count, sizeof(*mtd_list), GFP_KERNEL);
- if (!mtd_list)
- goto err_flash_remove;
-
- for (i = 0; i < count; i++) {
- err = -ENXIO;
- if (of_address_to_resource(dp, i, &res)) {
- /*
- * Continue with next register tuple if this
- * one is not mappable
- */
- continue;
- }
-
- dev_dbg(&dev->dev, "of_flash device: %pR\n", &res);
-
- err = -EBUSY;
- res_size = resource_size(&res);
- info->list[i].map.virt = devm_ioremap_resource(&dev->dev, &res);
- if (IS_ERR(info->list[i].map.virt)) {
- err = PTR_ERR(info->list[i].map.virt);
- goto err_out;
- }
-
- err = -ENXIO;
- width = of_get_property(dp, "bank-width", NULL);
- if (!width) {
- dev_err(&dev->dev, "Can't get bank width from device"
- " tree\n");
- goto err_out;
- }
-
- info->list[i].map.name = mtd_name ?: dev_name(&dev->dev);
- info->list[i].map.phys = res.start;
- info->list[i].map.size = res_size;
- info->list[i].map.bankwidth = be32_to_cpup(width);
- info->list[i].map.device_node = dp;
-
- if (of_property_read_bool(dp, "big-endian"))
- info->list[i].map.swap = CFI_BIG_ENDIAN;
- else if (of_property_read_bool(dp, "little-endian"))
- info->list[i].map.swap = CFI_LITTLE_ENDIAN;
-
- err = of_flash_probe_gemini(dev, dp, &info->list[i].map);
- if (err)
- goto err_out;
- err = of_flash_probe_versatile(dev, dp, &info->list[i].map);
- if (err)
- goto err_out;
-
- simple_map_init(&info->list[i].map);
-
- /*
- * On some platforms (e.g. MPC5200) a direct 1:1 mapping
- * may cause problems with JFFS2 usage, as the local bus (LPB)
- * doesn't support unaligned accesses as implemented in the
- * JFFS2 code via memcpy(). By setting NO_XIP, the
- * flash will not be exposed directly to the MTD users
- * (e.g. JFFS2) any more.
- */
- if (map_indirect)
- info->list[i].map.phys = NO_XIP;
-
- if (probe_type) {
- info->list[i].mtd = do_map_probe(probe_type,
- &info->list[i].map);
- } else {
- info->list[i].mtd = obsolete_probe(dev,
- &info->list[i].map);
- }
-
- /* Fall back to mapping region as ROM */
- if (!info->list[i].mtd) {
- dev_warn(&dev->dev,
- "do_map_probe() failed for type %s\n",
- probe_type);
-
- info->list[i].mtd = do_map_probe("map_rom",
- &info->list[i].map);
- }
- mtd_list[i] = info->list[i].mtd;
-
- err = -ENXIO;
- if (!info->list[i].mtd) {
- dev_err(&dev->dev, "do_map_probe() failed\n");
- goto err_out;
- } else {
- info->list_size++;
- }
- info->list[i].mtd->dev.parent = &dev->dev;
- }
-
- err = 0;
- info->cmtd = NULL;
- if (info->list_size == 1) {
- info->cmtd = info->list[0].mtd;
- } else if (info->list_size > 1) {
- /*
- * We detected multiple devices. Concatenate them together.
- */
- info->cmtd = mtd_concat_create(mtd_list, info->list_size,
- dev_name(&dev->dev));
- }
- if (info->cmtd == NULL)
- err = -ENXIO;
-
- if (err)
- goto err_out;
-
- info->cmtd->dev.parent = &dev->dev;
- mtd_set_of_node(info->cmtd, dp);
- part_probe_types = of_get_probes(dp);
- if (!part_probe_types) {
- err = -ENOMEM;
- goto err_out;
- }
- mtd_device_parse_register(info->cmtd, part_probe_types, NULL,
- NULL, 0);
- of_free_probes(part_probe_types);
-
- kfree(mtd_list);
-
- return 0;
-
-err_out:
- kfree(mtd_list);
-err_flash_remove:
- of_flash_remove(dev);
-
- return err;
-}
-
-static const struct of_device_id of_flash_match[] = {
- {
- .compatible = "cfi-flash",
- .data = (void *)"cfi_probe",
- },
- {
- /* FIXME: JEDEC chips can't be safely and reliably
- * probed, although the mtd code gets it right in
- * practice most of the time. We should use the
- * vendor and device ids specified by the binding to
- * bypass the heuristic probe code, but the mtd layer
- * provides, at present, no interface for doing so
- * :(. */
- .compatible = "jedec-flash",
- .data = (void *)"jedec_probe",
- },
- {
- .compatible = "mtd-ram",
- .data = (void *)"map_ram",
- },
- {
- .compatible = "mtd-rom",
- .data = (void *)"map_rom",
- },
- {
- .type = "rom",
- .compatible = "direct-mapped"
- },
- { },
-};
-MODULE_DEVICE_TABLE(of, of_flash_match);
-
-static struct platform_driver of_flash_driver = {
- .driver = {
- .name = "of-flash",
- .of_match_table = of_flash_match,
- },
- .probe = of_flash_probe,
- .remove = of_flash_remove,
-};
-
-module_platform_driver(of_flash_driver);
-
-MODULE_LICENSE("GPL");
-MODULE_AUTHOR("Vitaly Wool <vwool@ru.mvista.com>");
-MODULE_DESCRIPTION("Device tree based MTD map driver");
projects / linux.git / commitdiff