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brcm47xx: update flash drivers

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git-svn-id: svn://svn.openwrt.org/openwrt/trunk@31126 3c298f89-4303-0410-b956-a3cf2f4a3e73
This commit is contained in:
hauke
2012-03-28 17:03:18 +00:00
parent 1ff90943e2
commit d2f6c11460
19 changed files with 373 additions and 693 deletions
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105
target/linux/brcm47xx/patches-3.2/027-mtd-bcm47xx-add-serial-flash-driver.patch
View File

@@ -1,19 +1,3 @@
From 2e2951220bf63e05449c03a95453680da1029e44 Mon Sep 17 00:00:00 2001
From: Hauke Mehrtens <hauke@hauke-m.de>
Date: Sun, 17 Jul 2011 14:55:45 +0200
Subject: [PATCH 08/15] mtd: bcm47xx: add serial flash driver
sflash get the sflash ops from platform device
Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>
---
arch/mips/include/asm/mach-bcm47xx/bus.h | 3 +
drivers/mtd/maps/Kconfig | 9 +
drivers/mtd/maps/Makefile | 1 +
drivers/mtd/maps/bcm47xx-sflash.c | 252 ++++++++++++++++++++++++++++++
4 files changed, 265 insertions(+), 0 deletions(-)
create mode 100644 drivers/mtd/maps/bcm47xx-sflash.c
--- a/arch/mips/include/asm/mach-bcm47xx/bus.h
+++ b/arch/mips/include/asm/mach-bcm47xx/bus.h
@@ -11,6 +11,7 @@
@@ -24,7 +8,7 @@ Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>
#include <bcm47xx.h>
struct bcm47xx_sflash {
@@ -29,6 +30,8 @@ struct bcm47xx_sflash {
@@ -28,6 +29,8 @@ struct bcm47xx_sflash {
u32 blocksize; /* Block size */
u32 numblocks; /* Number of blocks */
u32 size; /* Total size in bytes */
@@ -60,19 +44,15 @@ Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>
+obj-$(CONFIG_MTD_BCM47XX_SFLASH)+= bcm47xx-sflash.o
--- /dev/null
+++ b/drivers/mtd/maps/bcm47xx-sflash.c
@@ -0,0 +1,252 @@
@@ -0,0 +1,263 @@
+/*
+ * Broadcom SiliconBackplane chipcommon serial flash interface
+ *
+ * Copyright 2011, 2012, Hauke Mehrtens <hauke@hauke-m.de>
+ * Copyright 2006, Broadcom Corporation
+ * All Rights Reserved.
+ *
+ * THIS SOFTWARE IS OFFERED "AS IS", AND BROADCOM GRANTS NO WARRANTIES OF ANY
+ * KIND, EXPRESS OR IMPLIED, BY STATUTE, COMMUNICATION OR OTHERWISE. BROADCOM
+ * SPECIFICALLY DISCLAIMS ANY IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS
+ * FOR A SPECIFIC PURPOSE OR NONINFRINGEMENT CONCERNING THIS SOFTWARE.
+ *
+ * $Id$
+ * Licensed under the GNU/GPL. See COPYING for details.
+ */
+
+#define pr_fmt(fmt) "bcm47xx_sflash: " fmt
@@ -93,28 +73,27 @@ Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>
+sflash_mtd_poll(struct bcm47xx_sflash *sflash, unsigned int offset, int timeout)
+{
+ unsigned long now = jiffies;
+ int ret = 0;
+
+ for (;;) {
+ if (!sflash->poll(sflash, offset)) {
+ ret = 0;
+ break;
+ }
+ if (time_after(jiffies, now + timeout)) {
+ pr_err("timeout while polling\n");
+ ret = -ETIMEDOUT;
+ break;
+ return -ETIMEDOUT;
+
+ }
+ cpu_relax();
+ udelay(1);
+ }
+
+ return ret;
+ return 0;
+}
+
+static int
+sflash_mtd_read(struct mtd_info *mtd, loff_t from, size_t len, size_t *retlen, u_char *buf)
+{
+ struct bcm47xx_sflash *sflash = (struct bcm47xx_sflash *) mtd->priv;
+ struct bcm47xx_sflash *sflash = (struct bcm47xx_sflash *)mtd->priv;
+
+ /* Check address range */
+ if (!len)
@@ -124,7 +103,6 @@ Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>
+ return -EINVAL;
+
+ *retlen = 0;
+
+ while (len) {
+ int ret = sflash->read(sflash, from, len, buf);
+ if (ret < 0)
@@ -142,7 +120,9 @@ Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>
+static int
+sflash_mtd_write(struct mtd_info *mtd, loff_t to, size_t len, size_t *retlen, const u_char *buf)
+{
+ struct bcm47xx_sflash *sflash = (struct bcm47xx_sflash *) mtd->priv;
+ int bytes;
+ int ret;
+ struct bcm47xx_sflash *sflash = (struct bcm47xx_sflash *)mtd->priv;
+
+ /* Check address range */
+ if (!len)
@@ -153,8 +133,7 @@ Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>
+
+ *retlen = 0;
+ while (len) {
+ int bytes;
+ int ret = sflash->write(sflash, to, len, buf);
+ ret = sflash->write(sflash, to, len, buf);
+ if (ret < 0)
+ return ret;
+
@@ -228,26 +207,30 @@ Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>
+{
+ struct bcm47xx_sflash *sflash = dev_get_platdata(&pdev->dev);
+ struct mtd_info *mtd;
+ struct mtd_erase_region_info *regions;
+ struct mtd_erase_region_info *eraseregions;
+ int ret = 0;
+
+ mtd = kzalloc(sizeof(struct mtd_info), GFP_KERNEL);
+ if (!mtd)
+ return -ENOMEM;
+ if (!mtd){
+ ret = -ENOMEM;
+ goto err_out;
+ }
+
+ regions = kzalloc(sizeof(struct mtd_erase_region_info), GFP_KERNEL);
+ if (!mtd)
+ return -ENOMEM;
+ eraseregions = kzalloc(sizeof(struct mtd_erase_region_info), GFP_KERNEL);
+ if (!eraseregions) {
+ ret = -ENOMEM;
+ goto err_free_mtd;
+ }
+
+ pr_info("found serial flash: blocksize=%dKB, numblocks=%d, size=%dKB\n",
+ sflash->blocksize/1024, sflash->numblocks, sflash->size / 1024);
+ sflash->blocksize / 1024, sflash->numblocks, sflash->size / 1024);
+
+ /* Setup region info */
+ regions->offset = 0;
+ regions->erasesize = sflash->blocksize;
+ regions->numblocks = sflash->numblocks;
+ if (regions->erasesize > mtd->erasesize)
+ mtd->erasesize = regions->erasesize;
+ eraseregions->offset = 0;
+ eraseregions->erasesize = sflash->blocksize;
+ eraseregions->numblocks = sflash->numblocks;
+ if (eraseregions->erasesize > mtd->erasesize)
+ mtd->erasesize = eraseregions->erasesize;
+ mtd->size = sflash->size;
+ mtd->numeraseregions = 1;
+
@@ -255,33 +238,45 @@ Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>
+ mtd->name = "bcm47xx-sflash";
+ mtd->type = MTD_NORFLASH;
+ mtd->flags = MTD_CAP_NORFLASH;
+ mtd->eraseregions = regions;
+ mtd->eraseregions = eraseregions;
+ mtd->erase = sflash_mtd_erase;
+ mtd->read = sflash_mtd_read;
+ mtd->write = sflash_mtd_write;
+ mtd->writesize = 1;
+ mtd->priv = sflash;
+ ret = dev_set_drvdata(&pdev->dev, mtd);
+ mtd->owner = THIS_MODULE;
+ if (ret) {
+ pr_err("adding private data failed\n");
+ goto err_free_eraseregions;
+ }
+
+ ret = mtd_device_parse_register(mtd, probes, NULL, NULL, 0);
+
+ if (ret) {
+ pr_err("mtd_device_register failed\n");
+ return ret;
+ goto err_free_eraseregions;
+ }
+ sflash->mtd = mtd;
+ return 0;
+
+err_free_eraseregions:
+ kfree(eraseregions);
+err_free_mtd:
+ kfree(mtd);
+err_out:
+ return ret;
+}
+
+static int __devexit bcm47xx_sflash_remove(struct platform_device *pdev)
+{
+ struct bcm47xx_sflash *sflash = dev_get_platdata(&pdev->dev);
+ struct mtd_info *mtd = dev_get_drvdata(&pdev->dev);
+
+ if (sflash) {
+ mtd_device_unregister(sflash->mtd);
+ map_destroy(sflash->mtd);
+ kfree(sflash->mtd->eraseregions);
+ kfree(sflash->mtd);
+ if (mtd) {
+ mtd_device_unregister(mtd);
+ map_destroy(mtd);
+ kfree(mtd->eraseregions);
+ kfree(mtd);
+ dev_set_drvdata(&pdev->dev, NULL);
+ }
+ return 0;
+}