From 86cc79ac985ffd954d26c88d144b82063a714636 Mon Sep 17 00:00:00 2001 From: Hauke Mehrtens Date: Sun, 18 Nov 2012 21:27:00 +0000 Subject: brcm47xx: add support for kernel 3.6 This is based on the patch by Peter Wagner. SVN-Revision: 34252 --- ...ma-add-functions-to-write-to-serial-flash.patch | 345 +++++++++++++++++++++ 1 file changed, 345 insertions(+) create mode 100644 target/linux/brcm47xx/patches-3.6/070-bcma-add-functions-to-write-to-serial-flash.patch (limited to 'target/linux/brcm47xx/patches-3.6/070-bcma-add-functions-to-write-to-serial-flash.patch') diff --git a/target/linux/brcm47xx/patches-3.6/070-bcma-add-functions-to-write-to-serial-flash.patch b/target/linux/brcm47xx/patches-3.6/070-bcma-add-functions-to-write-to-serial-flash.patch new file mode 100644 index 0000000000..8fb70d68f4 --- /dev/null +++ b/target/linux/brcm47xx/patches-3.6/070-bcma-add-functions-to-write-to-serial-flash.patch @@ -0,0 +1,345 @@ +--- a/drivers/bcma/driver_chipcommon_sflash.c ++++ b/drivers/bcma/driver_chipcommon_sflash.c +@@ -1,15 +1,22 @@ + /* + * Broadcom specific AMBA + * ChipCommon serial flash interface ++ * Copyright 2011, Jonas Gorski ++ * Copyright 2011, 2012, Hauke Mehrtens ++ * Copyright 2010, Broadcom Corporation + * + * Licensed under the GNU/GPL. See COPYING for details. + */ + + #include ++#include + #include ++#include + + #include "bcma_private.h" + ++#define NUM_RETRIES 3 ++ + static struct resource bcma_sflash_resource = { + .name = "bcma_sflash", + .start = BCMA_SOC_FLASH2, +@@ -18,7 +25,7 @@ static struct resource bcma_sflash_resou + }; + + struct platform_device bcma_sflash_dev = { +- .name = "bcma_sflash", ++ .name = "bcm47xx-sflash", + .resource = &bcma_sflash_resource, + .num_resources = 1, + }; +@@ -30,7 +37,7 @@ struct bcma_sflash_tbl_e { + u16 numblocks; + }; + +-static struct bcma_sflash_tbl_e bcma_sflash_st_tbl[] = { ++static const struct bcma_sflash_tbl_e bcma_sflash_st_tbl[] = { + { "M25P20", 0x11, 0x10000, 4, }, + { "M25P40", 0x12, 0x10000, 8, }, + +@@ -41,7 +48,7 @@ static struct bcma_sflash_tbl_e bcma_sfl + { 0 }, + }; + +-static struct bcma_sflash_tbl_e bcma_sflash_sst_tbl[] = { ++static const struct bcma_sflash_tbl_e bcma_sflash_sst_tbl[] = { + { "SST25WF512", 1, 0x1000, 16, }, + { "SST25VF512", 0x48, 0x1000, 16, }, + { "SST25WF010", 2, 0x1000, 32, }, +@@ -59,7 +66,7 @@ static struct bcma_sflash_tbl_e bcma_sfl + { 0 }, + }; + +-static struct bcma_sflash_tbl_e bcma_sflash_at_tbl[] = { ++static const struct bcma_sflash_tbl_e bcma_sflash_at_tbl[] = { + { "AT45DB011", 0xc, 256, 512, }, + { "AT45DB021", 0x14, 256, 1024, }, + { "AT45DB041", 0x1c, 256, 2048, }, +@@ -84,12 +91,230 @@ static void bcma_sflash_cmd(struct bcma_ + bcma_err(cc->core->bus, "SFLASH control command failed (timeout)!\n"); + } + ++static void bcma_sflash_write_u8(struct bcma_drv_cc *cc, u32 offset, u8 byte) ++{ ++ bcma_cc_write32(cc, BCMA_CC_FLASHADDR, offset); ++ bcma_cc_write32(cc, BCMA_CC_FLASHDATA, byte); ++} ++ ++/* Read len bytes starting at offset into buf. Returns number of bytes read. */ ++static int bcma_sflash_read(struct bcm47xx_sflash *dev, u32 offset, u32 len, u8 *buf) ++{ ++ u8 *from, *to; ++ u32 cnt, i; ++ struct bcma_drv_cc *cc = dev->bcc; ++ ++ if (!len) ++ return 0; ++ ++ if ((offset + len) > cc->sflash.size) ++ return -EINVAL; ++ ++ if ((len >= 4) && (offset & 3)) ++ cnt = 4 - (offset & 3); ++ else if ((len >= 4) && ((u32)buf & 3)) ++ cnt = 4 - ((u32)buf & 3); ++ else ++ cnt = len; ++ ++ from = (u8 *)KSEG0ADDR(BCMA_SOC_FLASH2 + offset); ++ ++ to = (u8 *)buf; ++ ++ if (cnt < 4) { ++ for (i = 0; i < cnt; i++) { ++ *to = readb(from); ++ from++; ++ to++; ++ } ++ return cnt; ++ } ++ ++ while (cnt >= 4) { ++ *(u32 *)to = readl(from); ++ from += 4; ++ to += 4; ++ cnt -= 4; ++ } ++ ++ return len - cnt; ++} ++ ++/* Poll for command completion. Returns zero when complete. */ ++static int bcma_sflash_poll(struct bcm47xx_sflash *dev, u32 offset) ++{ ++ struct bcma_drv_cc *cc = dev->bcc; ++ ++ if (offset >= cc->sflash.size) ++ return -22; ++ ++ switch (cc->capabilities & BCMA_CC_CAP_FLASHT) { ++ case BCMA_CC_FLASHT_STSER: ++ /* Check for ST Write In Progress bit */ ++ bcma_sflash_cmd(cc, BCMA_CC_FLASHCTL_ST_RDSR); ++ return bcma_cc_read32(cc, BCMA_CC_FLASHDATA) ++ & BCMA_CC_FLASHDATA_ST_WIP; ++ case BCMA_CC_FLASHT_ATSER: ++ /* Check for Atmel Ready bit */ ++ bcma_sflash_cmd(cc, BCMA_CC_FLASHCTL_AT_STATUS); ++ return !(bcma_cc_read32(cc, BCMA_CC_FLASHDATA) ++ & BCMA_CC_FLASHDATA_AT_READY); ++ } ++ ++ return 0; ++} ++ ++ ++static int sflash_st_write(struct bcm47xx_sflash *dev, u32 offset, u32 len, ++ const u8 *buf) ++{ ++ int written = 1; ++ struct bcma_drv_cc *cc = dev->bcc; ++ ++ /* Enable writes */ ++ bcma_sflash_cmd(cc, BCMA_CC_FLASHCTL_ST_WREN); ++ bcma_sflash_write_u8(cc, offset, *buf++); ++ /* Issue a page program with CSA bit set */ ++ bcma_sflash_cmd(cc, BCMA_CC_FLASHCTL_ST_CSA | BCMA_CC_FLASHCTL_ST_PP); ++ offset++; ++ len--; ++ while (len > 0) { ++ if ((offset & 255) == 0) { ++ /* Page boundary, poll droping cs and return */ ++ bcma_cc_write32(cc, BCMA_CC_FLASHCTL, 0); ++ udelay(1); ++ if (!bcma_sflash_poll(dev, offset)) { ++ /* Flash rejected command */ ++ return -EAGAIN; ++ } ++ return written; ++ } else { ++ /* Write single byte */ ++ bcma_sflash_cmd(cc, ++ BCMA_CC_FLASHCTL_ST_CSA | ++ *buf++); ++ } ++ written++; ++ offset++; ++ len--; ++ } ++ /* All done, drop cs & poll */ ++ bcma_cc_write32(cc, BCMA_CC_FLASHCTL, 0); ++ udelay(1); ++ if (!bcma_sflash_poll(dev, offset)) { ++ /* Flash rejected command */ ++ return -EAGAIN; ++ } ++ return written; ++} ++ ++static int sflash_at_write(struct bcm47xx_sflash *dev, u32 offset, u32 len, ++ const u8 *buf) ++{ ++ struct bcma_drv_cc *cc = dev->bcc; ++ u32 page, byte, mask; ++ int ret = 0; ++ ++ mask = dev->blocksize - 1; ++ page = (offset & ~mask) << 1; ++ byte = offset & mask; ++ /* Read main memory page into buffer 1 */ ++ if (byte || (len < dev->blocksize)) { ++ int i = 100; ++ bcma_cc_write32(cc, BCMA_CC_FLASHADDR, page); ++ bcma_sflash_cmd(cc, BCMA_CC_FLASHCTL_AT_BUF1_LOAD); ++ /* 250 us for AT45DB321B */ ++ while (i > 0 && bcma_sflash_poll(dev, offset)) { ++ udelay(10); ++ i--; ++ } ++ BUG_ON(!bcma_sflash_poll(dev, offset)); ++ } ++ /* Write into buffer 1 */ ++ for (ret = 0; (ret < (int)len) && (byte < dev->blocksize); ret++) { ++ bcma_sflash_write_u8(cc, byte++, *buf++); ++ bcma_sflash_cmd(cc, BCMA_CC_FLASHCTL_AT_BUF1_WRITE); ++ } ++ /* Write buffer 1 into main memory page */ ++ bcma_cc_write32(cc, BCMA_CC_FLASHADDR, page); ++ bcma_sflash_cmd(cc, BCMA_CC_FLASHCTL_AT_BUF1_PROGRAM); ++ ++ return ret; ++} ++ ++/* Write len bytes starting at offset into buf. Returns number of bytes ++ * written. Caller should poll for completion. ++ */ ++static int bcma_sflash_write(struct bcm47xx_sflash *dev, u32 offset, u32 len, ++ const u8 *buf) ++{ ++ int ret = 0, tries = NUM_RETRIES; ++ struct bcma_drv_cc *cc = dev->bcc; ++ ++ if (!len) ++ return 0; ++ ++ if ((offset + len) > cc->sflash.size) ++ return -EINVAL; ++ ++ switch (cc->capabilities & BCMA_CC_CAP_FLASHT) { ++ case BCMA_CC_FLASHT_STSER: ++ do { ++ ret = sflash_st_write(dev, offset, len, buf); ++ tries--; ++ } while (ret == -EAGAIN && tries > 0); ++ ++ if (ret == -EAGAIN && tries == 0) { ++ bcma_info(cc->core->bus, "ST Flash rejected write\n"); ++ ret = -EIO; ++ } ++ break; ++ case BCMA_CC_FLASHT_ATSER: ++ ret = sflash_at_write(dev, offset, len, buf); ++ break; ++ } ++ ++ return ret; ++} ++ ++/* Erase a region. Returns number of bytes scheduled for erasure. ++ * Caller should poll for completion. ++ */ ++static int bcma_sflash_erase(struct bcm47xx_sflash *dev, u32 offset) ++{ ++ struct bcma_drv_cc *cc = dev->bcc; ++ ++ if (offset >= cc->sflash.size) ++ return -EINVAL; ++ ++ switch (cc->capabilities & BCMA_CC_CAP_FLASHT) { ++ case BCMA_CC_FLASHT_STSER: ++ bcma_sflash_cmd(cc, BCMA_CC_FLASHCTL_ST_WREN); ++ bcma_cc_write32(cc, BCMA_CC_FLASHADDR, offset); ++ /* Newer flashes have "sub-sectors" which can be erased independently ++ * with a new command: ST_SSE. The ST_SE command erases 64KB just as ++ * before. ++ */ ++ if (dev->blocksize < (64 * 1024)) ++ bcma_sflash_cmd(cc, BCMA_CC_FLASHCTL_ST_SSE); ++ else ++ bcma_sflash_cmd(cc, BCMA_CC_FLASHCTL_ST_SE); ++ return dev->blocksize; ++ case BCMA_CC_FLASHT_ATSER: ++ bcma_cc_write32(cc, BCMA_CC_FLASHADDR, offset << 1); ++ bcma_sflash_cmd(cc, BCMA_CC_FLASHCTL_AT_PAGE_ERASE); ++ return dev->blocksize; ++ } ++ ++ return 0; ++} ++ + /* Initialize serial flash access */ + int bcma_sflash_init(struct bcma_drv_cc *cc) + { + struct bcma_bus *bus = cc->core->bus; +- struct bcma_sflash *sflash = &cc->sflash; +- struct bcma_sflash_tbl_e *e; ++ struct bcm47xx_sflash *sflash = &cc->sflash; ++ const struct bcma_sflash_tbl_e *e; + u32 id, id2; + + switch (cc->capabilities & BCMA_CC_CAP_FLASHT) { +@@ -150,6 +375,12 @@ int bcma_sflash_init(struct bcma_drv_cc + sflash->numblocks = e->numblocks; + sflash->size = sflash->blocksize * sflash->numblocks; + sflash->present = true; ++ sflash->read = bcma_sflash_read; ++ sflash->poll = bcma_sflash_poll; ++ sflash->write = bcma_sflash_write; ++ sflash->erase = bcma_sflash_erase; ++ sflash->type = BCM47XX_SFLASH_BCMA; ++ sflash->bcc = cc; + + bcma_info(bus, "Found %s serial flash (size: %dKiB, blocksize: 0x%X, blocks: %d)\n", + e->name, sflash->size / 1024, sflash->blocksize, +--- a/include/linux/bcma/bcma_driver_chipcommon.h ++++ b/include/linux/bcma/bcma_driver_chipcommon.h +@@ -1,6 +1,8 @@ + #ifndef LINUX_BCMA_DRIVER_CC_H_ + #define LINUX_BCMA_DRIVER_CC_H_ + ++#include ++ + /** ChipCommon core registers. **/ + #define BCMA_CC_ID 0x0000 + #define BCMA_CC_ID_ID 0x0000FFFF +@@ -516,17 +518,6 @@ struct bcma_pflash { + u32 window_size; + }; + +-#ifdef CONFIG_BCMA_SFLASH +-struct bcma_sflash { +- bool present; +- u32 window; +- u32 blocksize; +- u16 numblocks; +- u32 size; +- +- struct mtd_info *mtd; +-}; +-#endif + + #ifdef CONFIG_BCMA_NFLASH + struct mtd_info; +@@ -561,7 +552,7 @@ struct bcma_drv_cc { + #ifdef CONFIG_BCMA_DRIVER_MIPS + struct bcma_pflash pflash; + #ifdef CONFIG_BCMA_SFLASH +- struct bcma_sflash sflash; ++ struct bcm47xx_sflash sflash; + #endif + #ifdef CONFIG_BCMA_NFLASH + struct bcma_nflash nflash; -- cgit v1.2.3