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)19 int 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