1 /* 2 * Broadcom specific AMBA 3 * ChipCommon NAND flash interface 4 * 5 * Licensed under the GNU/GPL. See COPYING for details. 6 */ 7 8 #include "bcma_private.h" 9 10 #include <linux/platform_device.h> 11 #include <linux/bcma/bcma.h> 12 13 struct platform_device bcma_nflash_dev = { 14 .name = "bcma_nflash", 15 .num_resources = 0, 16 }; 17 18 /* Initialize NAND flash access */ bcma_nflash_init(struct bcma_drv_cc * cc)19int bcma_nflash_init(struct bcma_drv_cc *cc) 20 { 21 struct bcma_bus *bus = cc->core->bus; 22 23 if (bus->chipinfo.id != BCMA_CHIP_ID_BCM4706 && 24 cc->core->id.rev != 38) { 25 bcma_err(bus, "NAND flash on unsupported board!\n"); 26 return -ENOTSUPP; 27 } 28 29 if (!(cc->capabilities & BCMA_CC_CAP_NFLASH)) { 30 bcma_err(bus, "NAND flash not present according to ChipCommon\n"); 31 return -ENODEV; 32 } 33 34 cc->nflash.present = true; 35 if (cc->core->id.rev == 38 && 36 (cc->status & BCMA_CC_CHIPST_5357_NAND_BOOT)) 37 cc->nflash.boot = true; 38 39 /* Prepare platform device, but don't register it yet. It's too early, 40 * malloc (required by device_private_init) is not available yet. */ 41 bcma_nflash_dev.dev.platform_data = &cc->nflash; 42 43 return 0; 44 } 45