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brcm47xx: update patches
* this adds sflash support for ssb devices * the flash is now a platform device * minor updates git-svn-id: svn://svn.openwrt.org/openwrt/trunk@27902 3c298f89-4303-0410-b956-a3cf2f4a3e73
This commit is contained in:
hauke
@@ -0,0 +1,330 @@
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From 6a615274708fff685952139fee00ebccc0cf3266 Mon Sep 17 00:00:00 2001
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From: Hauke Mehrtens <hauke@hauke-m.de>
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Date: Sun, 17 Jul 2011 14:55:45 +0200
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Subject: [PATCH 19/26] mtd: bcm47xx: add serial flash driver
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sflash get the sflash ops from platform device
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Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>
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---
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arch/mips/include/asm/mach-bcm47xx/bus.h | 3 +
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drivers/mtd/maps/Kconfig | 9 +
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drivers/mtd/maps/Makefile | 1 +
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drivers/mtd/maps/bcm47xx-sflash.c | 267 ++++++++++++++++++++++++++++++
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4 files changed, 280 insertions(+), 0 deletions(-)
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create mode 100644 drivers/mtd/maps/bcm47xx-sflash.c
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--- a/arch/mips/include/asm/mach-bcm47xx/bus.h
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+++ b/arch/mips/include/asm/mach-bcm47xx/bus.h
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@@ -11,6 +11,7 @@
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#include <linux/ssb/ssb.h>
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#include <linux/bcma/bcma.h>
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+#include <linux/mtd/mtd.h>
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#include <bcm47xx.h>
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struct bcm47xx_sflash {
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@@ -29,6 +30,8 @@ struct bcm47xx_sflash {
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u32 blocksize; /* Block size */
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u32 numblocks; /* Number of blocks */
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u32 size; /* Total size in bytes */
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+
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+ struct mtd_info *mtd;
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};
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void bcm47xx_sflash_struct_bcma_init(struct bcm47xx_sflash *sflash, struct bcma_drv_cc *bcc);
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--- a/drivers/mtd/maps/Kconfig
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+++ b/drivers/mtd/maps/Kconfig
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@@ -273,6 +273,15 @@ config MTD_BCM47XX_PFLASH
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help
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Support for bcm47xx parallel flash
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+config MTD_BCM47XX_SFLASH
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+ tristate "bcm47xx serial flash support"
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+ default y
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+ depends on BCM47XX
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+ select MTD_PARTITIONS
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+ select MTD_BCM47XX_PARTS
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+ help
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+ Support for bcm47xx parallel flash
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+
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config MTD_DILNETPC
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tristate "CFI Flash device mapped on DIL/Net PC"
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depends on X86 && MTD_CFI_INTELEXT && BROKEN
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--- a/drivers/mtd/maps/Makefile
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+++ b/drivers/mtd/maps/Makefile
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@@ -61,3 +61,4 @@ obj-$(CONFIG_MTD_BCM963XX) += bcm963xx-f
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obj-$(CONFIG_MTD_LATCH_ADDR) += latch-addr-flash.o
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obj-$(CONFIG_MTD_LANTIQ) += lantiq-flash.o
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obj-$(CONFIG_MTD_BCM47XX_PFLASH)+= bcm47xx-pflash.o
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+obj-$(CONFIG_MTD_BCM47XX_SFLASH)+= bcm47xx-sflash.o
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--- /dev/null
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+++ b/drivers/mtd/maps/bcm47xx-sflash.c
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@@ -0,0 +1,267 @@
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+/*
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+ * Broadcom SiliconBackplane chipcommon serial flash interface
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+ *
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+ * Copyright 2006, Broadcom Corporation
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+ * All Rights Reserved.
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+ *
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+ * THIS SOFTWARE IS OFFERED "AS IS", AND BROADCOM GRANTS NO WARRANTIES OF ANY
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+ * KIND, EXPRESS OR IMPLIED, BY STATUTE, COMMUNICATION OR OTHERWISE. BROADCOM
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+ * SPECIFICALLY DISCLAIMS ANY IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS
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+ * FOR A SPECIFIC PURPOSE OR NONINFRINGEMENT CONCERNING THIS SOFTWARE.
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+ *
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+ * $Id$
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+ */
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+
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+#define pr_fmt(fmt) "bcm47xx_sflash: " fmt
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+#include <linux/module.h>
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+#include <linux/slab.h>
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+#include <linux/ioport.h>
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+#include <linux/sched.h>
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+#include <linux/mtd/mtd.h>
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+#include <linux/mtd/map.h>
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+#include <linux/mtd/partitions.h>
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+#include <linux/errno.h>
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+#include <linux/delay.h>
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+#include <linux/platform_device.h>
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+#include <bcm47xx.h>
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+#include <bus.h>
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+
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+static int
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+sflash_mtd_poll(struct bcm47xx_sflash *sflash, unsigned int offset, int timeout)
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+{
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+ unsigned long now = jiffies;
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+ int ret = 0;
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+
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+ for (;;) {
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+ if (!sflash->poll(sflash, offset)) {
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+ ret = 0;
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+ break;
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+ }
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+ if (time_after(jiffies, now + timeout)) {
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+ pr_err("timeout while polling\n");
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+ ret = -ETIMEDOUT;
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+ break;
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+ }
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+ udelay(1);
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+ }
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+
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+ return ret;
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+}
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+
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+static int
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+sflash_mtd_read(struct mtd_info *mtd, loff_t from, size_t len, size_t *retlen, u_char *buf)
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+{
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+ struct bcm47xx_sflash *sflash = (struct bcm47xx_sflash *) mtd->priv;
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+
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+ /* Check address range */
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+ if (!len)
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+ return 0;
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+
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+ if ((from + len) > mtd->size)
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+ return -EINVAL;
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+
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+ *retlen = 0;
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+
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+ while (len) {
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+ int ret = sflash->read(sflash, from, len, buf);
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+ if (ret < 0)
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+ return ret;
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+
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+ from += (loff_t) ret;
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+ len -= ret;
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+ buf += ret;
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+ *retlen += ret;
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+ }
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+
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+ return 0;
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+}
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+
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+static int
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+sflash_mtd_write(struct mtd_info *mtd, loff_t to, size_t len, size_t *retlen, const u_char *buf)
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+{
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+ struct bcm47xx_sflash *sflash = (struct bcm47xx_sflash *) mtd->priv;
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+
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+ /* Check address range */
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+ if (!len)
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+ return 0;
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+
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+ if ((to + len) > mtd->size)
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+ return -EINVAL;
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+
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+ *retlen = 0;
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+ while (len) {
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+ int bytes;
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+ int ret = sflash->write(sflash, to, len, buf);
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+ if (ret < 0)
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+ return ret;
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+
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+ bytes = ret;
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+
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+ ret = sflash_mtd_poll(sflash, (unsigned int) to, HZ / 10);
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+ if (ret)
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+ return ret;
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+
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+ to += (loff_t) bytes;
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+ len -= bytes;
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+ buf += bytes;
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+ *retlen += bytes;
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+ }
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+
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+ return 0;
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+}
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+
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+static int
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+sflash_mtd_erase(struct mtd_info *mtd, struct erase_info *erase)
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+{
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+ struct bcm47xx_sflash *sflash = (struct bcm47xx_sflash *) mtd->priv;
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+ int i, j, ret = 0;
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+ unsigned int addr, len;
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+
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+ /* Check address range */
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+ if (!erase->len)
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+ return 0;
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+ if ((erase->addr + erase->len) > mtd->size)
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+ return -EINVAL;
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+
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+ addr = erase->addr;
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+ len = erase->len;
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+
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+ /* Ensure that requested regions are aligned */
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+ for (i = 0; i < mtd->numeraseregions; i++) {
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+ for (j = 0; j < mtd->eraseregions[i].numblocks; j++) {
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+ if (addr == mtd->eraseregions[i].offset +
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+ mtd->eraseregions[i].erasesize * j &&
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+ len >= mtd->eraseregions[i].erasesize) {
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+ ret = sflash->erase(sflash, addr);
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+ if (ret < 0)
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+ break;
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+ ret = sflash_mtd_poll(sflash, addr, 10 * HZ);
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+ if (ret)
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+ break;
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+ addr += mtd->eraseregions[i].erasesize;
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+ len -= mtd->eraseregions[i].erasesize;
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+ }
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+ }
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+ if (ret)
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+ break;
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+ }
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+
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+ /* Set erase status */
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+ if (ret)
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+ erase->state = MTD_ERASE_FAILED;
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+ else
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+ erase->state = MTD_ERASE_DONE;
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+
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+ /* Call erase callback */
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+ if (erase->callback)
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+ erase->callback(erase);
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+
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+ return ret;
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+}
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+
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+static const char *probes[] = { "bcm47xx", NULL };
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+
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+static int bcm47xx_sflash_probe(struct platform_device *pdev)
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+{
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+ struct bcm47xx_sflash *sflash = dev_get_platdata(&pdev->dev);
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+ struct mtd_info *mtd;
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+ struct mtd_erase_region_info *regions;
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+ int ret = 0;
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+
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+ struct mtd_partition *parts;
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+ int num_partitions = 0;
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+
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+ mtd = kzalloc(sizeof(struct mtd_info), GFP_KERNEL);
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+ if (!mtd)
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+ return -ENOMEM;
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+
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+ regions = kzalloc(sizeof(struct mtd_erase_region_info), GFP_KERNEL);
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+ if (!mtd)
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+ return -ENOMEM;
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+
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+ pr_info("found serial flash: blocksize=%dKB, numblocks=%d, size=%dKB\n",
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+ sflash->blocksize/1024, sflash->numblocks, sflash->size / 1024);
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+
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+ /* Setup region info */
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+ regions->offset = 0;
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+ regions->erasesize = sflash->blocksize;
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+ regions->numblocks = sflash->numblocks;
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+ if (regions->erasesize > mtd->erasesize)
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+ mtd->erasesize = regions->erasesize;
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+ mtd->size = sflash->size;
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+ mtd->numeraseregions = 1;
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+
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+ /* Register with MTD */
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+ mtd->name = "bcm47xx-sflash";
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+ mtd->type = MTD_NORFLASH;
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+ mtd->flags = MTD_CAP_NORFLASH;
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+ mtd->eraseregions = regions;
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+ mtd->erase = sflash_mtd_erase;
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+ mtd->read = sflash_mtd_read;
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+ mtd->write = sflash_mtd_write;
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+ mtd->writesize = 1;
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+ mtd->priv = sflash;
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+ mtd->owner = THIS_MODULE;
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+
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+ num_partitions = parse_mtd_partitions(mtd, probes, &parts, 0);
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+ if (num_partitions < 0) {
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+ ret = num_partitions;
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+ goto err_destroy;
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+ }
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+
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+ ret = mtd_device_register(mtd, parts, num_partitions);
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+
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+// ret = mtd_device_parse_register(bcm47xx_mtd, "bcm47xx", NULL, NULL, 0);
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+
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+ if (ret) {
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+ pr_err("mtd_device_register failed\n");
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+ return ret;
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+ }
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+ sflash->mtd = mtd;
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+ return 0;
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+
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+err_destroy:
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+ map_destroy(mtd);
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+ return ret;
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+}
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+
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+static int __devexit bcm47xx_sflash_remove(struct platform_device *pdev)
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+{
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+ struct bcm47xx_sflash *sflash = dev_get_platdata(&pdev->dev);
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+
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+ if (sflash) {
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+ mtd_device_unregister(sflash->mtd);
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+ map_destroy(sflash->mtd);
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+ kfree(sflash->mtd->eraseregions);
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+ kfree(sflash->mtd);
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+ }
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+ return 0;
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+}
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+
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+static struct platform_driver bcm47xx_sflash_driver = {
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+ .remove = __devexit_p(bcm47xx_sflash_remove),
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+ .driver = {
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+ .name = "bcm47xx_sflash",
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+ .owner = THIS_MODULE,
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+ },
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+};
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+
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+static int __init init_bcm47xx_sflash(void)
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+{
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+ int ret = platform_driver_probe(&bcm47xx_sflash_driver, bcm47xx_sflash_probe);
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+
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+ if (ret)
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+ pr_err("error registering platform driver: %i\n", ret);
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+ return ret;
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+}
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+
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+static void __exit exit_bcm47xx_sflash(void)
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+{
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+ platform_driver_unregister(&bcm47xx_sflash_driver);
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+}
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+
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+module_init(init_bcm47xx_sflash);
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+module_exit(exit_bcm47xx_sflash);
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+
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+MODULE_LICENSE("GPL");
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+MODULE_DESCRIPTION("BCM47XX parallel flash driver");
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