---
This is only proof of concept, don't apply!
---
drivers/mtd/devices/Makefile | 1 +
drivers/mtd/devices/b47sflash.c | 113 +++++++++++++++++++++++++++++++++++++++
2 files changed, 114 insertions(+), 0 deletions(-)
create mode 100644 drivers/mtd/devices/b47sflash.c
diff --git a/drivers/mtd/devices/Makefile b/drivers/mtd/devices/Makefile
index a4dd1d8..b449760 100644
--- a/drivers/mtd/devices/Makefile
+++ b/drivers/mtd/devices/Makefile
@@ -19,5 +19,6 @@ obj-$(CONFIG_MTD_DATAFLASH) += mtd_dataflash.o
obj-$(CONFIG_MTD_M25P80) += m25p80.o
obj-$(CONFIG_MTD_SPEAR_SMI) += spear_smi.o
obj-$(CONFIG_MTD_SST25L) += sst25l.o
+obj-y += b47sflash.o
CFLAGS_docg3.o += -I$(src)
\ No newline at end of file
diff --git a/drivers/mtd/devices/b47sflash.c b/drivers/mtd/devices/b47sflash.c
new file mode 100644
index 0000000..37080f2
--- /dev/null
+++ b/drivers/mtd/devices/b47sflash.c
@@ -0,0 +1,113 @@
+#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>
+
+MODULE_LICENSE("GPL");
+MODULE_DESCRIPTION("Broadcom serial flash driver");
+
+#if 0
+static const char *probes[] = { "bcm47xx", NULL };
+#endif
+
+static int b47sflash_read(struct mtd_info *mtd, loff_t from, size_t len,
+ size_t *retlen, u_char *buf)
+{
+ //struct bcma_sflash *sflash = mtd->priv;
+ size_t bytes_read = 0;
+ u32 *src;
+ u32 *desc = (u32 *)buf;
+
+ /* Check address range */
+ if (!len)
+ return 0;
+
+ if ((from + len) > mtd->size)
+ return -EINVAL;
+
+ /* Is this an aligned access? */
+ if (from & 0x3)
+ return -EINVAL;
+
+ src = (u32 *)KSEG0ADDR(0x1c000000 + from);
+ while (bytes_read < len) {
+ *desc = readl(src);
+ desc++;
+ src++;
+ bytes_read += 4;
+ }
+
+ *retlen = bytes_read;
+
+ return 0;
+}
+
+static void b47sflash_fill_mtd(struct bcma_sflash *sflash, struct mtd_info *mtd)
+{
+ mtd->priv = sflash;
+ mtd->name = "b47sflash";
+ mtd->owner = THIS_MODULE;
+ mtd->_read = b47sflash_read;
+ mtd->size = sflash->size;
+}
+
+static int b47sflash_probe(struct platform_device *pdev)
+{
+ struct bcma_sflash *sflash = dev_get_platdata(&pdev->dev);
+ struct mtd_info *mtd;
+
+ mtd = kzalloc(sizeof(struct mtd_info), GFP_KERNEL);
+ if (!mtd)
+ return -ENOMEM;
+ b47sflash_fill_mtd(sflash, mtd);
+
+#if 0
+ err = mtd_device_parse_register(mtd, probes, NULL, NULL, 0);
+ if (err) {
+ pr_err("Failed to register MTD device: %d\n", err);
+ return err;
+ }
+#endif
+
+ return 0;
+}
+
+static int __devexit b47sflash_remove(struct platform_device *pdev)
+{
+ //struct mtd_info *mtd = dev_get_drvdata(&pdev->dev);
+ return 0;
+}
+
+static struct platform_driver bcma_sflash_driver = {
+ .remove = __devexit_p(b47sflash_remove),
+ .driver = {
+ .name = "bcma_sflash",
+ .owner = THIS_MODULE,
+ },
+};
+
+static int __init init_b47sflash(void)
+{
+ int err;
+
+ err = platform_driver_probe(&bcma_sflash_driver, b47sflash_probe);
+ if (err)
+ pr_err("Failed to register serial flash driver: %d\n", err);
+
+ return err;
+}
+
+static void __exit exit_b47sflash(void)
+{
+ platform_driver_unregister(&bcma_sflash_driver);
+}
+
+void b47sflash_early_mtd(struct bcma_sflash *sflash, struct mtd_info *mtd)
+{
+ b47sflash_fill_mtd(sflash, mtd);
+}
+
+module_init(init_b47sflash);
+module_exit(exit_b47sflash);
--
1.7.7
--
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