1 files changed, 62 insertions, 0 deletions
diff --git a/drivers/bcma/driver_chipcommon_nflash.c b/drivers/bcma/driver_chipcommon_nflash.c
new file mode 100644
index 000000000..a1a814750
--- /dev/null
+++ b/drivers/bcma/driver_chipcommon_nflash.c
@@ -0,0 +1,62 @@
+/*
+ * 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;
+}