diff options
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.patch | 310 |
1 files changed, 310 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 0000000000..1e2577b728 --- /dev/null +++ b/target/linux/brcm47xx/patches-3.3/027-mtd-bcm47xx-add-serial-flash-driver.patch @@ -0,0 +1,310 @@ +--- a/arch/mips/include/asm/mach-bcm47xx/bus.h ++++ b/arch/mips/include/asm/mach-bcm47xx/bus.h +@@ -11,6 +11,7 @@ + + #include <linux/ssb/ssb.h> + #include <linux/bcma/bcma.h> ++#include <linux/mtd/mtd.h> + #include <bcm47xx.h> + + struct bcm47xx_sflash { +@@ -28,6 +29,8 @@ struct bcm47xx_sflash { + u32 blocksize; /* Block size */ + u32 numblocks; /* Number of blocks */ + u32 size; /* Total size in bytes */ ++ ++ struct mtd_info *mtd; + }; + + void bcm47xx_sflash_struct_bcma_init(struct bcm47xx_sflash *sflash, struct bcma_drv_cc *bcc); +--- 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"); |