diff options
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/mtd/nand/Kconfig | 9 | ||||
| -rw-r--r-- | drivers/mtd/nand/Makefile | 1 | ||||
| -rw-r--r-- | drivers/mtd/nand/bcm47xxnflash/Makefile | 3 | ||||
| -rw-r--r-- | drivers/mtd/nand/bcm47xxnflash/bcm47xxnflash.h | 14 | ||||
| -rw-r--r-- | drivers/mtd/nand/bcm47xxnflash/main.c | 108 |
5 files changed, 135 insertions, 0 deletions
diff --git a/drivers/mtd/nand/Kconfig b/drivers/mtd/nand/Kconfig index a803d9ba55bd..3314e92120c9 100644 --- a/drivers/mtd/nand/Kconfig +++ b/drivers/mtd/nand/Kconfig @@ -460,6 +460,15 @@ config MTD_NAND_GPMI_NAND block, such as SD card. So pay attention to it when you enable the GPMI. +config MTD_NAND_BCM47XXNFLASH + tristate "R/O support for NAND flash on BCMA bus" + depends on BCMA_NFLASH + help + BCMA bus can have various flash memories attached, they are + registered by bcma as platform devices. This enables driver for + NAND flash memories. For now only read mode for BCM4706 is + implemented. + config MTD_NAND_PLATFORM tristate "Support for generic platform NAND driver" depends on HAS_IOMEM diff --git a/drivers/mtd/nand/Makefile b/drivers/mtd/nand/Makefile index 44fca0553365..3c3f215287f9 100644 --- a/drivers/mtd/nand/Makefile +++ b/drivers/mtd/nand/Makefile @@ -54,5 +54,6 @@ obj-$(CONFIG_MTD_NAND_RICOH) += r852.o obj-$(CONFIG_MTD_NAND_JZ4740) += jz4740_nand.o obj-$(CONFIG_MTD_NAND_GPMI_NAND) += gpmi-nand/ obj-$(CONFIG_MTD_NAND_XWAY) += xway_nand.o +obj-$(CONFIG_MTD_NAND_BCM47XXNFLASH) += bcm47xxnflash/ nand-objs := nand_base.o nand_bbt.o diff --git a/drivers/mtd/nand/bcm47xxnflash/Makefile b/drivers/mtd/nand/bcm47xxnflash/Makefile new file mode 100644 index 000000000000..1d0693af6e98 --- /dev/null +++ b/drivers/mtd/nand/bcm47xxnflash/Makefile @@ -0,0 +1,3 @@ +bcm47xxnflash-y += main.o + +obj-$(CONFIG_MTD_NAND_BCM47XXNFLASH) += bcm47xxnflash.o diff --git a/drivers/mtd/nand/bcm47xxnflash/bcm47xxnflash.h b/drivers/mtd/nand/bcm47xxnflash/bcm47xxnflash.h new file mode 100644 index 000000000000..2e8864a891e2 --- /dev/null +++ b/drivers/mtd/nand/bcm47xxnflash/bcm47xxnflash.h @@ -0,0 +1,14 @@ +#ifndef __BCM47XXNFLASH_H +#define __BCM47XXNFLASH_H + +#include <linux/mtd/mtd.h> +#include <linux/mtd/nand.h> + +struct bcm47xxnflash { + struct bcma_drv_cc *cc; + + struct nand_chip nand_chip; + struct mtd_info mtd; +}; + +#endif /* BCM47XXNFLASH */ diff --git a/drivers/mtd/nand/bcm47xxnflash/main.c b/drivers/mtd/nand/bcm47xxnflash/main.c new file mode 100644 index 000000000000..fc9139de4dfa --- /dev/null +++ b/drivers/mtd/nand/bcm47xxnflash/main.c @@ -0,0 +1,108 @@ +/* + * BCM47XX NAND flash driver + * + * Copyright (C) 2012 Rafał Miłecki <zajec5@gmail.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/module.h> +#include <linux/kernel.h> +#include <linux/slab.h> +#include <linux/platform_device.h> +#include <linux/bcma/bcma.h> + +#include "bcm47xxnflash.h" + +MODULE_DESCRIPTION("NAND flash driver for BCMA bus"); +MODULE_LICENSE("GPL"); +MODULE_AUTHOR("Rafał Miłecki"); + +static const char *probes[] = { "bcm47xxpart", NULL }; + +static int bcm47xxnflash_probe(struct platform_device *pdev) +{ + struct bcma_nflash *nflash = dev_get_platdata(&pdev->dev); + struct bcm47xxnflash *b47n; + int err = 0; + + b47n = kzalloc(sizeof(*b47n), GFP_KERNEL); + if (!b47n) { + err = -ENOMEM; + goto out; + } + + b47n->nand_chip.priv = b47n; + b47n->mtd.owner = THIS_MODULE; + b47n->mtd.priv = &b47n->nand_chip; /* Required */ + b47n->cc = container_of(nflash, struct bcma_drv_cc, nflash); + + if (0) { + /* TODO: init device */ + } else { + pr_err("Device not supported\n"); + err = -ENOTSUPP; + } + if (err) { + pr_err("Initialization failed: %d\n", err); + goto err_init; + } + + err = mtd_device_parse_register(&b47n->mtd, probes, NULL, NULL, 0); + if (err) { + pr_err("Failed to register MTD device: %d\n", err); + goto err_dev_reg; + } + + return 0; + +err_dev_reg: +err_init: + kfree(b47n); +out: + return err; +} + +static int __devexit bcm47xxnflash_remove(struct platform_device *pdev) +{ + struct bcma_nflash *nflash = dev_get_platdata(&pdev->dev); + + if (nflash->mtd) + mtd_device_unregister(nflash->mtd); + + return 0; +} + +static struct platform_driver bcm47xxnflash_driver = { + .remove = __devexit_p(bcm47xxnflash_remove), + .driver = { + .name = "bcma_nflash", + .owner = THIS_MODULE, + }, +}; + +static int __init bcm47xxnflash_init(void) +{ + int err; + + /* + * Platform device "bcma_nflash" exists on SoCs and is registered very + * early, it won't be added during runtime (use platform_driver_probe). + */ + err = platform_driver_probe(&bcm47xxnflash_driver, bcm47xxnflash_probe); + if (err) + pr_err("Failed to register serial flash driver: %d\n", err); + + return err; +} + +static void __exit bcm47xxnflash_exit(void) +{ + platform_driver_unregister(&bcm47xxnflash_driver); +} + +module_init(bcm47xxnflash_init); +module_exit(bcm47xxnflash_exit); |