brcm47xx: add support for kernel 3.6

This is based on the patch by Peter Wagner.


git-svn-id: svn://svn.openwrt.org/openwrt/trunk@34252 3c298f89-4303-0410-b956-a3cf2f4a3e73

1 files changed, 345 insertions, 0 deletions

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 <jonas.gorski@gmail.com>
++ * Copyright 2011, 2012, Hauke Mehrtens <hauke@hauke-m.de>
++ * Copyright 2010, Broadcom Corporation
+  *
+  * Licensed under the GNU/GPL. See COPYING for details.
+  */
+ 
+ #include <linux/platform_device.h>
++#include <linux/delay.h>
+ #include <linux/bcma/bcma.h>
++#include <linux/bcma/bcma_driver_chipcommon.h>
+ 
+ #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 <linux/mtd/bcm47xx_sflash.h>
++
+ /** 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;