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Diffstat (limited to 'target/linux/brcm47xx/patches-3.8/052-mtd-add-serial-flash-driver.patch')
-rw-r--r--target/linux/brcm47xx/patches-3.8/052-mtd-add-serial-flash-driver.patch345
1 files changed, 345 insertions, 0 deletions
diff --git a/target/linux/brcm47xx/patches-3.8/052-mtd-add-serial-flash-driver.patch b/target/linux/brcm47xx/patches-3.8/052-mtd-add-serial-flash-driver.patch
new file mode 100644
index 000000000..844f89d4b
--- /dev/null
+++ b/target/linux/brcm47xx/patches-3.8/052-mtd-add-serial-flash-driver.patch
@@ -0,0 +1,345 @@
+--- a/drivers/mtd/devices/bcm47xxsflash.c
++++ b/drivers/mtd/devices/bcm47xxsflash.c
+@@ -1,47 +1,153 @@
+-#include <linux/kernel.h>
++/*
++ * 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) "bcm47xxsflash: " 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 <linux/bcma/bcma.h>
+-
+-#include "bcm47xxsflash.h"
++#include <linux/mtd/bcm47xxsflash.h>
+
+ MODULE_LICENSE("GPL");
+-MODULE_DESCRIPTION("Serial flash driver for BCMA bus");
++MODULE_DESCRIPTION("BCM47XX serial flash driver");
+
+ static const char *probes[] = { "bcm47xxpart", NULL };
+
++static int
++sflash_mtd_poll(struct bcm47xxsflash *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 bcm47xxsflash_read(struct mtd_info *mtd, loff_t from, size_t len,
+ size_t *retlen, u_char *buf)
+ {
+- struct bcm47xxsflash *b47s = mtd->priv;
++ struct bcm47xxsflash *sflash = (struct bcm47xxsflash *)mtd->priv;
+
+ /* Check address range */
++ if (!len)
++ return 0;
++
+ if ((from + len) > mtd->size)
+ return -EINVAL;
+
+- memcpy_fromio(buf, (void __iomem *)KSEG0ADDR(b47s->window + from),
++ memcpy_fromio(buf, (void __iomem *)KSEG0ADDR(sflash->window + from),
+ len);
+ *retlen = len;
+
+ return len;
+ }
+
+-static void bcm47xxsflash_fill_mtd(struct bcm47xxsflash *b47s)
++static int
++sflash_mtd_write(struct mtd_info *mtd, loff_t to, size_t len, size_t *retlen, const u_char *buf)
+ {
+- struct mtd_info *mtd = &b47s->mtd;
++ int bytes;
++ int ret;
++ struct bcm47xxsflash *sflash = (struct bcm47xxsflash *)mtd->priv;
+
+- mtd->priv = b47s;
+- mtd->name = "bcm47xxsflash";
+- mtd->owner = THIS_MODULE;
+- mtd->type = MTD_ROM;
+- mtd->size = b47s->size;
+- mtd->_read = bcm47xxsflash_read;
++ /* 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;
++ }
+
+- /* TODO: implement writing support and verify/change following code */
+- mtd->flags = MTD_CAP_ROM;
+- mtd->writebufsize = mtd->writesize = 1;
++ return 0;
++}
++
++static int
++sflash_mtd_erase(struct mtd_info *mtd, struct erase_info *erase)
++{
++ struct bcm47xxsflash *sflash = (struct bcm47xxsflash *) 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;
+ }
+
+ /**************************************************
+@@ -50,53 +156,94 @@ static void bcm47xxsflash_fill_mtd(struc
+
+ static int bcm47xxsflash_bcma_probe(struct platform_device *pdev)
+ {
+- struct bcma_sflash *sflash = dev_get_platdata(&pdev->dev);
+- struct bcm47xxsflash *b47s;
+- int err;
++ struct bcm47xxsflash *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;
++ }
+
+- b47s = kzalloc(sizeof(*b47s), GFP_KERNEL);
+- if (!b47s) {
+- err = -ENOMEM;
+- goto out;
+- }
+- sflash->priv = b47s;
+-
+- b47s->window = sflash->window;
+- b47s->blocksize = sflash->blocksize;
+- b47s->numblocks = sflash->numblocks;
+- b47s->size = sflash->size;
+- bcm47xxsflash_fill_mtd(b47s);
+-
+- err = mtd_device_parse_register(&b47s->mtd, probes, NULL, NULL, 0);
+- if (err) {
+- pr_err("Failed to register MTD device: %d\n", err);
+- goto err_dev_reg;
++ 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 = bcm47xxsflash_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_dev_reg:
+- kfree(&b47s->mtd);
+-out:
+- return err;
++err_free_eraseregions:
++ kfree(eraseregions);
++err_free_mtd:
++ kfree(mtd);
++err_out:
++ return ret;
+ }
+
+ static int bcm47xxsflash_bcma_remove(struct platform_device *pdev)
+ {
+- struct bcma_sflash *sflash = dev_get_platdata(&pdev->dev);
+- struct bcm47xxsflash *b47s = sflash->priv;
+-
+- mtd_device_unregister(&b47s->mtd);
+- kfree(b47s);
++ 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 const struct platform_device_id bcm47xxsflash_table[] = {
++ { "bcm47xx-sflash", 0 },
++ { }
++};
++MODULE_DEVICE_TABLE(platform, bcm47xxsflash_table);
++
+ static struct platform_driver bcma_sflash_driver = {
++ .id_table = bcm47xxsflash_table,
+ .probe = bcm47xxsflash_bcma_probe,
+ .remove = bcm47xxsflash_bcma_remove,
+ .driver = {
+- .name = "bcma_sflash",
++ .name = "bcm47xx-sflash",
+ .owner = THIS_MODULE,
+ },
+ };
+@@ -111,8 +258,7 @@ static int __init bcm47xxsflash_init(voi
+
+ err = platform_driver_register(&bcma_sflash_driver);
+ if (err)
+- pr_err("Failed to register BCMA serial flash driver: %d\n",
+- err);
++ pr_err("error registering platform driver: %i\n", err);
+
+ return err;
+ }
+--- /dev/null
++++ b/include/linux/mtd/bcm47xxsflash.h
+@@ -0,0 +1,33 @@
++#ifndef LINUX_MTD_BCM47XX_SFLASH_H_
++#define LINUX_MTD_BCM47XX_SFLASH_H_
++
++#include <linux/mtd/mtd.h>
++
++enum bcm47xxsflash_type {
++ BCM47XX_SFLASH_SSB,
++ BCM47XX_SFLASH_BCMA,
++};
++
++struct ssb_chipcommon;
++struct bcma_drv_cc;
++
++struct bcm47xxsflash {
++ enum bcm47xxsflash_type type;
++ union {
++ struct ssb_chipcommon *scc;
++ struct bcma_drv_cc *bcc;
++ };
++
++ bool present;
++ u16 numblocks;
++ u32 window;
++ u32 blocksize;
++ u32 size;
++
++ int (*poll)(struct bcm47xxsflash *dev, u32 offset);
++ int (*write)(struct bcm47xxsflash *dev, u32 offset, u32 len, const u8 *buf);
++ int (*erase)(struct bcm47xxsflash *dev, u32 offset);
++
++ struct mtd_info *mtd;
++};
++#endif /* LINUX_MTD_BCM47XX_SFLASH_H_ */
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