1 files changed, 137 insertions, 0 deletions
diff --git a/drivers/mtd/devices/bcm47xxsflash.c b/drivers/mtd/devices/bcm47xxsflash.c
new file mode 100644
index 00000000..18e77611
--- /dev/null
+++ b/drivers/mtd/devices/bcm47xxsflash.c
@@ -0,0 +1,137 @@
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/slab.h>
+#include <linux/mtd/mtd.h>
+#include <linux/platform_device.h>
+#include <linux/bcma/bcma.h>
+
+#include "bcm47xxsflash.h"
+
+MODULE_LICENSE("GPL");
+MODULE_DESCRIPTION("Serial flash driver for BCMA bus");
+
+static const char * const probes[] = { "bcm47xxpart", NULL };
+
+static int bcm47xxsflash_read(struct mtd_info *mtd, loff_t from, size_t len,
+			      size_t *retlen, u_char *buf)
+{
+	struct bcm47xxsflash *b47s = mtd->priv;
+
+	/* Check address range */
+	if ((from + len) > mtd->size)
+		return -EINVAL;
+
+	memcpy_fromio(buf, (void __iomem *)KSEG0ADDR(b47s->window + from),
+		      len);
+	*retlen = len;
+
+	return len;
+}
+
+static void bcm47xxsflash_fill_mtd(struct bcm47xxsflash *b47s)
+{
+	struct mtd_info *mtd = &b47s->mtd;
+
+	mtd->priv = b47s;
+	mtd->name = "bcm47xxsflash";
+	mtd->owner = THIS_MODULE;
+	mtd->type = MTD_ROM;
+	mtd->size = b47s->size;
+	mtd->_read = bcm47xxsflash_read;
+
+	/* TODO: implement writing support and verify/change following code */
+	mtd->flags = MTD_CAP_ROM;
+	mtd->writebufsize = mtd->writesize = 1;
+}
+
+/**************************************************
+ * BCMA
+ **************************************************/
+
+static int bcm47xxsflash_bcma_probe(struct platform_device *pdev)
+{
+	struct bcma_sflash *sflash = dev_get_platdata(&pdev->dev);
+	struct bcm47xxsflash *b47s;
+	int err;
+
+	b47s = kzalloc(sizeof(*b47s), GFP_KERNEL);
+	if (!b47s) {
+		err = -ENOMEM;
+		goto out;
+	}
+	sflash->priv = b47s;
+
+	b47s->bcma_cc = container_of(sflash, struct bcma_drv_cc, sflash);
+
+	switch (b47s->bcma_cc->capabilities & BCMA_CC_CAP_FLASHT) {
+	case BCMA_CC_FLASHT_STSER:
+		b47s->type = BCM47XXSFLASH_TYPE_ST;
+		break;
+	case BCMA_CC_FLASHT_ATSER:
+		b47s->type = BCM47XXSFLASH_TYPE_ATMEL;
+		break;
+	}
+
+	b47s->window = sflash->window;
+	b47s->blocksize = sflash->blocksize;
+	b47s->numblocks = sflash->numblocks;
+	b47s->size = sflash->size;
+	bcm47xxsflash_fill_mtd(b47s);
+
+	err = mtd_device_parse_register(&b47s->mtd, probes, NULL, NULL, 0);
+	if (err) {
+		pr_err("Failed to register MTD device: %d\n", err);
+		goto err_dev_reg;
+	}
+
+	return 0;
+
+err_dev_reg:
+	kfree(&b47s->mtd);
+out:
+	return err;
+}
+
+static int bcm47xxsflash_bcma_remove(struct platform_device *pdev)
+{
+	struct bcma_sflash *sflash = dev_get_platdata(&pdev->dev);
+	struct bcm47xxsflash *b47s = sflash->priv;
+
+	mtd_device_unregister(&b47s->mtd);
+	kfree(b47s);
+
+	return 0;
+}
+
+static struct platform_driver bcma_sflash_driver = {
+	.probe	= bcm47xxsflash_bcma_probe,
+	.remove = bcm47xxsflash_bcma_remove,
+	.driver = {
+		.name = "bcma_sflash",
+		.owner = THIS_MODULE,
+	},
+};
+
+/**************************************************
+ * Init
+ **************************************************/
+
+static int __init bcm47xxsflash_init(void)
+{
+	int err;
+
+	err = platform_driver_register(&bcma_sflash_driver);
+	if (err)
+		pr_err("Failed to register BCMA serial flash driver: %d\n",
+		       err);
+
+	return err;
+}
+
+static void __exit bcm47xxsflash_exit(void)
+{
+	platform_driver_unregister(&bcma_sflash_driver);
+}
+
+module_init(bcm47xxsflash_init);
+module_exit(bcm47xxsflash_exit);