| 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/bitops.h>
|
| 11 | #include <linux/platform_device.h>
|
| 12 | #include <linux/platform_data/brcmnand.h>
|
| 13 | #include <linux/bcma/bcma.h>
|
| 14 |
|
| 15 | |
| 16 | * and bcma_brcmnand to be built into the same kernel image.
|
| 17 |
|
| 18 | static const char *bcma_nflash_alt_name = "bcma_brcmnand";
|
| 19 |
|
| 20 | struct platform_device bcma_nflash_dev = {
|
| 21 | .name = "bcma_nflash",
|
| 22 | .num_resources = 0,
|
| 23 | };
|
| 24 |
|
| 25 | static const char *probes[] = { "bcm47xxpart", NULL };
|
| 26 |
|
| 27 |
|
| 28 | int bcma_nflash_init(struct bcma_drv_cc *cc)
|
| 29 | {
|
| 30 | struct bcma_bus *bus = cc->core->bus;
|
| 31 | u32 reg;
|
| 32 |
|
| 33 | if (bus->chipinfo.id != BCMA_CHIP_ID_BCM4706 &&
|
| 34 | cc->core->id.rev != 38) {
|
| 35 | bcma_err(bus, "NAND flash on unsupported board!\n");
|
| 36 | return -ENOTSUPP;
|
| 37 | }
|
| 38 |
|
| 39 | if (!(cc->capabilities & BCMA_CC_CAP_NFLASH)) {
|
| 40 | bcma_err(bus, "NAND flash not present according to ChipCommon\n");
|
| 41 | return -ENODEV;
|
| 42 | }
|
| 43 |
|
| 44 | cc->nflash.present = true;
|
| 45 | if (cc->core->id.rev == 38 &&
|
| 46 | (cc->status & BCMA_CC_CHIPST_5357_NAND_BOOT)) {
|
| 47 | cc->nflash.boot = true;
|
| 48 |
|
| 49 | reg = bcma_cc_read32(cc, BCMA_CC_NAND_CS_NAND_SELECT) & 0xff;
|
| 50 | cc->nflash.brcmnand_info.chip_select = ffs(reg) - 1;
|
| 51 | cc->nflash.brcmnand_info.part_probe_types = probes;
|
| 52 | cc->nflash.brcmnand_info.ecc_stepsize = 512;
|
| 53 | cc->nflash.brcmnand_info.ecc_strength = 1;
|
| 54 | bcma_nflash_dev.name = bcma_nflash_alt_name;
|
| 55 | }
|
| 56 |
|
| 57 | |
| 58 | * malloc (required by device_private_init) is not available yet.
|
| 59 | bcma_nflash_dev.dev.platform_data = &cc->nflash;
|
| 60 |
|
| 61 | return 0;
|
| 62 | }
|