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-rw-r--r--target/linux/brcm47xx/patches-3.0/0016-mtd-bcm47xx-add-serial-flash-driver.patch312
1 files changed, 312 insertions, 0 deletions
diff --git a/target/linux/brcm47xx/patches-3.0/0016-mtd-bcm47xx-add-serial-flash-driver.patch b/target/linux/brcm47xx/patches-3.0/0016-mtd-bcm47xx-add-serial-flash-driver.patch
new file mode 100644
index 0000000000..20e5711faa
--- /dev/null
+++ b/target/linux/brcm47xx/patches-3.0/0016-mtd-bcm47xx-add-serial-flash-driver.patch
@@ -0,0 +1,312 @@
+From 8a6398687998886c451c6df381c2320b6dddb3fe 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 16/22] mtd: bcm47xx: add serial flash driver
+
+
+Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>
+---
+ drivers/mtd/maps/Kconfig | 9 ++
+ drivers/mtd/maps/Makefile | 1 +
+ drivers/mtd/maps/bcm47xx-sflash.c | 270 +++++++++++++++++++++++++++++++++++++
+ 3 files changed, 280 insertions(+), 0 deletions(-)
+ create mode 100644 drivers/mtd/maps/bcm47xx-sflash.c
+
+--- a/drivers/mtd/maps/Kconfig
++++ b/drivers/mtd/maps/Kconfig
+@@ -273,6 +273,15 @@ config MTD_BCM47XX_PFLASH
+ help
+ Support for bcm47xx parallel flash
+
++config MTD_BCM47XX_SFLASH
++ tristate "bcm47xx serial flash support"
++ default y
++ depends on BCM47XX
++ select MTD_PARTITIONS
++ select MTD_BCM47XX_PARTS
++ help
++ Support for bcm47xx parallel flash
++
+ config MTD_DILNETPC
+ tristate "CFI Flash device mapped on DIL/Net PC"
+ depends on X86 && MTD_CFI_INTELEXT && BROKEN
+--- a/drivers/mtd/maps/Makefile
++++ b/drivers/mtd/maps/Makefile
+@@ -61,3 +61,4 @@ obj-$(CONFIG_MTD_BCM963XX) += bcm963xx-f
+ obj-$(CONFIG_MTD_LATCH_ADDR) += latch-addr-flash.o
+ obj-$(CONFIG_MTD_LANTIQ) += lantiq-flash.o
+ obj-$(CONFIG_MTD_BCM47XX_PFLASH)+= bcm47xx-pflash.o
++obj-$(CONFIG_MTD_BCM47XX_SFLASH)+= bcm47xx-sflash.o
+--- /dev/null
++++ b/drivers/mtd/maps/bcm47xx-sflash.c
+@@ -0,0 +1,270 @@
++/*
++ * Broadcom SiliconBackplane chipcommon serial flash interface
++ *
++ * 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.
++ *
++ * $Id$
++ */
++
++#define pr_fmt(fmt) "bcm47xx_sflash: " fmt
++#include <linux/module.h>
++#include <linux/slab.h>
++#include <linux/ioport.h>
++#include <linux/sched.h>
++#include <linux/mtd/mtd.h>
++#include <linux/mtd/map.h>
++#include <linux/mtd/partitions.h>
++#include <linux/errno.h>
++#include <linux/delay.h>
++
++#include <bcm47xx.h>
++
++#include <linux/bcma/bcma.h>
++#include <linux/bcma/bcma_driver_chipcommon.h>
++#include <linux/platform_device.h>
++
++struct sflash_mtd {
++ struct bcma_drv_cc *cc;
++ struct mtd_info mtd;
++ struct mtd_erase_region_info region;
++};
++
++static struct sflash_mtd *sflash;
++
++static int
++sflash_mtd_poll(struct sflash_mtd *sflash, unsigned int offset, int timeout)
++{
++ unsigned long now = jiffies;
++ int ret = 0;
++
++ for (;;) {
++ if (!bcma_sflash_poll(sflash->cc, offset)) {
++ ret = 0;
++ break;
++ }
++ if (time_after(jiffies, now + timeout)) {
++ pr_err("timeout while polling\n");
++ ret = -ETIMEDOUT;
++ break;
++ }
++ udelay(1);
++ }
++
++ return ret;
++}
++
++static int
++sflash_mtd_read(struct mtd_info *mtd, loff_t from, size_t len, size_t *retlen, u_char *buf)
++{
++ struct sflash_mtd *sflash = (struct sflash_mtd *) mtd->priv;
++
++ /* Check address range */
++ if (!len)
++ return 0;
++
++ if ((from + len) > mtd->size)
++ return -EINVAL;
++
++ *retlen = 0;
++
++ while (len) {
++ int ret = bcma_sflash_read(sflash->cc, from, len, buf);
++ if (ret < 0)
++ return ret;
++
++ from += (loff_t) ret;
++ len -= ret;
++ buf += ret;
++ *retlen += ret;
++ }
++
++ return 0;
++}
++
++static int
++sflash_mtd_write(struct mtd_info *mtd, loff_t to, size_t len, size_t *retlen, const u_char *buf)
++{
++ struct sflash_mtd *sflash = (struct sflash_mtd *) mtd->priv;
++
++ /* Check address range */
++ if (!len)
++ return 0;
++
++ if ((to + len) > mtd->size)
++ return -EINVAL;
++
++ *retlen = 0;
++ while (len) {
++ int bytes;
++ int ret = bcma_sflash_write(sflash->cc, to, len, buf);
++ if (ret < 0)
++ return ret;
++
++ bytes = ret;
++
++ ret = sflash_mtd_poll(sflash, (unsigned int) to, HZ / 10);
++ if (ret)
++ return ret;
++
++ to += (loff_t) bytes;
++ len -= bytes;
++ buf += bytes;
++ *retlen += bytes;
++ }
++
++ return 0;
++}
++
++static int
++sflash_mtd_erase(struct mtd_info *mtd, struct erase_info *erase)
++{
++ struct sflash_mtd *sflash = (struct sflash_mtd *) mtd->priv;
++ int i, j, ret = 0;
++ unsigned int addr, len;
++
++ /* Check address range */
++ if (!erase->len)
++ return 0;
++ if ((erase->addr + erase->len) > mtd->size)
++ return -EINVAL;
++
++ addr = erase->addr;
++ len = erase->len;
++
++ /* Ensure that requested regions are aligned */
++ for (i = 0; i < mtd->numeraseregions; i++) {
++ for (j = 0; j < mtd->eraseregions[i].numblocks; j++) {
++ if (addr == mtd->eraseregions[i].offset +
++ mtd->eraseregions[i].erasesize * j &&
++ len >= mtd->eraseregions[i].erasesize) {
++ if ((ret = bcma_sflash_erase(sflash->cc, addr)) < 0)
++ break;
++ if ((ret = sflash_mtd_poll(sflash, addr, 10 * HZ)))
++ break;
++ addr += mtd->eraseregions[i].erasesize;
++ len -= mtd->eraseregions[i].erasesize;
++ }
++ }
++ if (ret)
++ break;
++ }
++
++ /* Set erase status */
++ if (ret)
++ erase->state = MTD_ERASE_FAILED;
++ else
++ erase->state = MTD_ERASE_DONE;
++
++ /* Call erase callback */
++ if (erase->callback)
++ erase->callback(erase);
++
++ return ret;
++}
++
++static const char *probes[] = { "bcm47xx", NULL };
++
++static int bcm47xx_sflash_probe(struct platform_device *pdev)
++{
++ int ret = 0;
++
++ struct mtd_partition *parts;
++ int num_partitions = 0;
++
++ sflash = kzalloc(sizeof(struct sflash_mtd), GFP_KERNEL);
++ if (!sflash)
++ return -ENOMEM;
++
++ sflash->cc = &bcm47xx_bus.bcma.bus.drv_cc;
++ if (sflash->cc->flash_type != BCMA_SFLASH)
++ return -ENODEV;
++
++ pr_info("found serial flash: blocksize=%dKB, numblocks=%d, size=%dKB\n",
++ sflash->cc->flash.sflash.blocksize/1024,
++ sflash->cc->flash.sflash.numblocks,
++ sflash->cc->flash.sflash.size/1024);
++
++ /* Setup region info */
++ sflash->region.offset = 0;
++ sflash->region.erasesize = sflash->cc->flash.sflash.blocksize;
++ sflash->region.numblocks = sflash->cc->flash.sflash.numblocks;
++ if (sflash->region.erasesize > sflash->mtd.erasesize)
++ sflash->mtd.erasesize = sflash->region.erasesize;
++ sflash->mtd.size = sflash->cc->flash.sflash.size;
++ sflash->mtd.numeraseregions = 1;
++
++ /* Register with MTD */
++ sflash->mtd.name = "bcm47xx-sflash";
++ sflash->mtd.type = MTD_NORFLASH;
++ sflash->mtd.flags = MTD_CAP_NORFLASH;
++ sflash->mtd.eraseregions = &sflash->region;
++ sflash->mtd.erase = sflash_mtd_erase;
++ sflash->mtd.read = sflash_mtd_read;
++ sflash->mtd.write = sflash_mtd_write;
++ sflash->mtd.writesize = 1;
++ sflash->mtd.priv = sflash;
++ sflash->mtd.owner = THIS_MODULE;
++
++ num_partitions = parse_mtd_partitions(&sflash->mtd, probes, &parts, 0);
++ if (num_partitions < 0) {
++ ret = num_partitions;
++ goto err_destroy;
++ }
++
++ ret = mtd_device_register(&sflash->mtd, parts, num_partitions);
++
++// ret = mtd_device_parse_register(bcm47xx_mtd, "bcm47xx", NULL, NULL, 0);
++
++ if (ret) {
++ pr_err("mtd_device_register failed\n");
++ return ret;
++ }
++ return 0;
++
++err_destroy:
++ map_destroy(&sflash->mtd);
++ return ret;
++}
++
++static int __devexit bcm47xx_sflash_remove(struct platform_device *pdev)
++{
++ if (sflash) {
++ mtd_device_unregister(&sflash->mtd);
++ map_destroy(&sflash->mtd);
++ }
++ return 0;
++}
++
++static struct platform_driver bcm47xx_sflash_driver = {
++ .remove = __devexit_p(bcm47xx_sflash_remove),
++ .driver = {
++ .name = "bcm47xx_sflash",
++ .owner = THIS_MODULE,
++ },
++};
++
++static int __init init_bcm47xx_sflash(void)
++{
++ int ret = platform_driver_probe(&bcm47xx_sflash_driver, bcm47xx_sflash_probe);
++
++ if (ret)
++ pr_err("error registering platform driver: %i\n", ret);
++ return ret;
++}
++
++static void __exit exit_bcm47xx_sflash(void)
++{
++ platform_driver_unregister(&bcm47xx_sflash_driver);
++}
++
++module_init(init_bcm47xx_sflash);
++module_exit(exit_bcm47xx_sflash);
++
++MODULE_LICENSE("GPL");
++MODULE_DESCRIPTION("BCM47XX parallel flash driver");