ASR_BASE
Change-Id: Icf3719cc0afe3eeb3edc7fa80a2eb5199ca9dda1
diff --git a/marvell/linux/drivers/media/pci/cobalt/cobalt-flash.c b/marvell/linux/drivers/media/pci/cobalt/cobalt-flash.c
new file mode 100644
index 0000000..1d3c64b
--- /dev/null
+++ b/marvell/linux/drivers/media/pci/cobalt/cobalt-flash.c
@@ -0,0 +1,116 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Cobalt NOR flash functions
+ *
+ * Copyright 2012-2015 Cisco Systems, Inc. and/or its affiliates.
+ * All rights reserved.
+ */
+
+#include <linux/mtd/mtd.h>
+#include <linux/mtd/map.h>
+#include <linux/mtd/cfi.h>
+#include <linux/time.h>
+
+#include "cobalt-flash.h"
+
+#define ADRS(offset) (COBALT_BUS_FLASH_BASE + offset)
+
+static struct map_info cobalt_flash_map = {
+ .name = "cobalt-flash",
+ .bankwidth = 2, /* 16 bits */
+ .size = 0x4000000, /* 64MB */
+ .phys = 0, /* offset */
+};
+
+static map_word flash_read16(struct map_info *map, unsigned long offset)
+{
+ map_word r;
+
+ r.x[0] = cobalt_bus_read32(map->virt, ADRS(offset));
+ if (offset & 0x2)
+ r.x[0] >>= 16;
+ else
+ r.x[0] &= 0x0000ffff;
+
+ return r;
+}
+
+static void flash_write16(struct map_info *map, const map_word datum,
+ unsigned long offset)
+{
+ u16 data = (u16)datum.x[0];
+
+ cobalt_bus_write16(map->virt, ADRS(offset), data);
+}
+
+static void flash_copy_from(struct map_info *map, void *to,
+ unsigned long from, ssize_t len)
+{
+ u32 src = from;
+ u8 *dest = to;
+ u32 data;
+
+ while (len) {
+ data = cobalt_bus_read32(map->virt, ADRS(src));
+ do {
+ *dest = data >> (8 * (src & 3));
+ src++;
+ dest++;
+ len--;
+ } while (len && (src % 4));
+ }
+}
+
+static void flash_copy_to(struct map_info *map, unsigned long to,
+ const void *from, ssize_t len)
+{
+ const u8 *src = from;
+ u32 dest = to;
+
+ pr_info("%s: offset 0x%x: length %zu\n", __func__, dest, len);
+ while (len) {
+ u16 data;
+
+ do {
+ data = *src << (8 * (dest & 1));
+ src++;
+ dest++;
+ len--;
+ } while (len && (dest % 2));
+
+ cobalt_bus_write16(map->virt, ADRS(dest - 2), data);
+ }
+}
+
+int cobalt_flash_probe(struct cobalt *cobalt)
+{
+ struct map_info *map = &cobalt_flash_map;
+ struct mtd_info *mtd;
+
+ BUG_ON(!map_bankwidth_supported(map->bankwidth));
+ map->virt = cobalt->bar1;
+ map->read = flash_read16;
+ map->write = flash_write16;
+ map->copy_from = flash_copy_from;
+ map->copy_to = flash_copy_to;
+
+ mtd = do_map_probe("cfi_probe", map);
+ cobalt->mtd = mtd;
+ if (!mtd) {
+ cobalt_err("Probe CFI flash failed!\n");
+ return -1;
+ }
+
+ mtd->owner = THIS_MODULE;
+ mtd->dev.parent = &cobalt->pci_dev->dev;
+ mtd_device_register(mtd, NULL, 0);
+ return 0;
+}
+
+void cobalt_flash_remove(struct cobalt *cobalt)
+{
+ if (cobalt->mtd) {
+ mtd_device_unregister(cobalt->mtd);
+ map_destroy(cobalt->mtd);
+ }
+}