/* * Broadcom specific AMBA * ChipCommon NAND flash interface * * Licensed under the GNU/GPL. See COPYING for details. */ #include "bcma_private.h" #include <linux/bitops.h>#include <linux/platform_device.h>#include <linux/platform_data/brcmnand.h>#include <linux/bcma/bcma.h> /* Alternate NAND controller driver name in order to allow both bcm47xxnflash * and bcma_brcmnand to be built into the same kernel image. */static const char *bcma_nflash_alt_name = "bcma_brcmnand"; struct platform_device bcma_nflash_dev = {	.name		= "bcma_nflash",	.num_resources	= 0,}; static const char *probes[] = { "bcm47xxpart", NULL }; /* Initialize NAND flash access */int bcma_nflash_init(struct bcma_drv_cc *cc){	struct bcma_bus *bus = cc->core->bus;	u32 reg; 	if (bus->chipinfo.id != BCMA_CHIP_ID_BCM4706 &&	    cc->core->id.rev != 38) {		bcma_err(bus, "NAND flash on unsupported board!\n");		return -ENOTSUPP;	} 	if (!(cc->capabilities & BCMA_CC_CAP_NFLASH)) {		bcma_err(bus, "NAND flash not present according to ChipCommon\n");		return -ENODEV;	} 	cc->nflash.present = true;	if (cc->core->id.rev == 38 &&	    (cc->status & BCMA_CC_CHIPST_5357_NAND_BOOT)) {		cc->nflash.boot = true;		/* Determine the chip select that is being used */		reg = bcma_cc_read32(cc, BCMA_CC_NAND_CS_NAND_SELECT) & 0xff;		cc->nflash.brcmnand_info.chip_select = ffs(reg) - 1;		cc->nflash.brcmnand_info.part_probe_types = probes;		cc->nflash.brcmnand_info.ecc_stepsize = 512;		cc->nflash.brcmnand_info.ecc_strength = 1;		bcma_nflash_dev.name = bcma_nflash_alt_name;	} 	/* Prepare platform device, but don't register it yet. It's too early,	 * malloc (required by device_private_init) is not available yet. */	bcma_nflash_dev.dev.platform_data = &cc->nflash; 	return 0;}