mirror of
git://projects.qi-hardware.com/openwrt-xburst.git
synced 2024-12-25 22:59:32 +02:00
288f3f6650
* update the flash driver for bcm47xx to use the stubs already in bcma * do some misc enhancements to the flash drivers for bcm47xx git-svn-id: svn://svn.openwrt.org/openwrt/trunk@33920 3c298f89-4303-0410-b956-a3cf2f4a3e73
336 lines
7.7 KiB
Diff
336 lines
7.7 KiB
Diff
--- 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 +1,270 @@
|
|
+/*
|
|
+ * 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_ */
|