+++ /dev/null
---- a/drivers/mtd/maps/Kconfig
-+++ b/drivers/mtd/maps/Kconfig
-@@ -258,6 +258,15 @@ 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 +1,270 @@
-+/*
-+ * 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 <linux/mtd/bcm47xx_sflash.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 const struct platform_device_id bcm47xx_sflash_table[] = {
-+ { "bcm47xx-sflash", 0 },
-+ { }
-+};
-+MODULE_DEVICE_TABLE(platform, bcm47xx_sflash_table);
-+
-+static struct platform_driver bcm47xx_sflash_driver = {
-+ .id_table = bcm47xx_sflash_table,
-+ .probe = bcm47xx_sflash_probe,
-+ .remove = __devexit_p(bcm47xx_sflash_remove),
-+ .driver = {
-+ .name = "bcm47xx-sflash",
-+ .owner = THIS_MODULE,
-+ },
-+};
-+
-+static int __init init_bcm47xx_sflash(void)
-+{
-+ int ret = platform_driver_register(&bcm47xx_sflash_driver);
-+
-+ 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 serial flash driver");
---- /dev/null
-+++ b/include/linux/mtd/bcm47xx_sflash.h
-@@ -0,0 +1,34 @@
-+#ifndef LINUX_MTD_BCM47XX_SFLASH_H_
-+#define LINUX_MTD_BCM47XX_SFLASH_H_
-+
-+#include <linux/mtd/mtd.h>
-+
-+enum bcm47xx_sflash_type {
-+ BCM47XX_SFLASH_SSB,
-+ BCM47XX_SFLASH_BCMA,
-+};
-+
-+struct ssb_chipcommon;
-+struct bcma_drv_cc;
-+
-+struct bcm47xx_sflash {
-+ enum bcm47xx_sflash_type type;
-+ union {
-+ struct ssb_chipcommon *scc;
-+ struct bcma_drv_cc *bcc;
-+ };
-+
-+ bool present;
-+ u16 numblocks;
-+ u32 window;
-+ u32 blocksize;
-+ u32 size;
-+
-+ int (*read)(struct bcm47xx_sflash *dev, u32 offset, u32 len, u8 *buf);
-+ int (*poll)(struct bcm47xx_sflash *dev, u32 offset);
-+ int (*write)(struct bcm47xx_sflash *dev, u32 offset, u32 len, const u8 *buf);
-+ int (*erase)(struct bcm47xx_sflash *dev, u32 offset);
-+
-+ struct mtd_info *mtd;
-+};
-+#endif /* LINUX_MTD_BCM47XX_SFLASH_H_ */
projects / openwrt / svn-archive / archive.git / blobdiff