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Diffstat (limited to 'target/linux/brcm47xx/patches-3.3/027-mtd-bcm47xx-add-serial-flash-driver.patch')
-rw-r--r--target/linux/brcm47xx/patches-3.3/027-mtd-bcm47xx-add-serial-flash-driver.patch291
1 files changed, 291 insertions, 0 deletions
diff --git a/target/linux/brcm47xx/patches-3.3/027-mtd-bcm47xx-add-serial-flash-driver.patch b/target/linux/brcm47xx/patches-3.3/027-mtd-bcm47xx-add-serial-flash-driver.patch
new file mode 100644
index 000000000..3aec60c11
--- /dev/null
+++ b/target/linux/brcm47xx/patches-3.3/027-mtd-bcm47xx-add-serial-flash-driver.patch
@@ -0,0 +1,291 @@
+--- a/drivers/mtd/maps/Kconfig
++++ b/drivers/mtd/maps/Kconfig
+@@ -257,6 +257,15 @@ 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
+@@ -58,3 +58,4 @@ obj-$(CONFIG_MTD_GPIO_ADDR) += gpio-addr
+ obj-$(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 +1,263 @@
++/*
++ * Broadcom SiliconBackplane chipcommon serial flash interface
++ *
++ * Copyright 2011, 2012, Hauke Mehrtens <hauke@hauke-m.de>
++ * Copyright 2006, Broadcom Corporation
++ * All Rights Reserved.
++ *
++ * Licensed under the GNU/GPL. See COPYING for details.
++ */
++
++#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 <linux/platform_device.h>
++#include <bcm47xx.h>
++#include <bus.h>
++
++static int
++sflash_mtd_poll(struct bcm47xx_sflash *sflash, unsigned int offset, int timeout)
++{
++ unsigned long now = jiffies;
++
++ for (;;) {
++ if (!sflash->poll(sflash, offset)) {
++ break;
++ }
++ if (time_after(jiffies, now + timeout)) {
++ pr_err("timeout while polling\n");
++ return -ETIMEDOUT;
++
++ }
++ cpu_relax();
++ udelay(1);
++ }
++
++ 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;
++
++ /* Check address range */
++ if (!len)
++ return 0;
++
++ if ((from + len) > mtd->size)
++ return -EINVAL;
++
++ *retlen = 0;
++ while (len) {
++ int ret = sflash->read(sflash, 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)
++{
++ int bytes;
++ int ret;
++ struct bcm47xx_sflash *sflash = (struct bcm47xx_sflash *)mtd->priv;
++
++ /* Check address range */
++ if (!len)
++ return 0;
++
++ if ((to + len) > mtd->size)
++ return -EINVAL;
++
++ *retlen = 0;
++ while (len) {
++ ret = sflash->write(sflash, 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 bcm47xx_sflash *sflash = (struct bcm47xx_sflash *) 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) {
++ ret = sflash->erase(sflash, addr);
++ if (ret < 0)
++ break;
++ ret = sflash_mtd_poll(sflash, addr, 10 * HZ);
++ if (ret)
++ 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)
++{
++ struct bcm47xx_sflash *sflash = dev_get_platdata(&pdev->dev);
++ struct mtd_info *mtd;
++ struct mtd_erase_region_info *eraseregions;
++ int ret = 0;
++
++ mtd = kzalloc(sizeof(struct mtd_info), GFP_KERNEL);
++ if (!mtd){
++ ret = -ENOMEM;
++ goto err_out;
++ }
++
++ 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);
++
++ /* Setup region info */
++ 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;
++
++ /* Register with MTD */
++ mtd->name = "bcm47xx-sflash";
++ mtd->type = MTD_NORFLASH;
++ mtd->flags = MTD_CAP_NORFLASH;
++ 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");
++ goto err_free_eraseregions;
++ }
++ 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 mtd_info *mtd = dev_get_drvdata(&pdev->dev);
++
++ if (mtd) {
++ mtd_device_unregister(mtd);
++ map_destroy(mtd);
++ kfree(mtd->eraseregions);
++ kfree(mtd);
++ dev_set_drvdata(&pdev->dev, NULL);
++ }
++ 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");
generated by cgit v1.2.3 (git 2.39.1) at 2024-05-06 02:37:56 +0000