brcm47xx: add support for kernel 3.3

SVN-Revision: 31573

1 files changed, 505 insertions, 0 deletions

diff --git a/target/linux/brcm47xx/patches-3.3/021-bcma-add-serial-flash-support-to-bcma.patch b/target/linux/brcm47xx/patches-3.3/021-bcma-add-serial-flash-support-to-bcma.patch
new file mode 100644
index 0000000000..2de4ba0f52
--- /dev/null
+++ b/target/linux/brcm47xx/patches-3.3/021-bcma-add-serial-flash-support-to-bcma.patch
@@ -0,0 +1,505 @@
+--- a/drivers/bcma/Kconfig
++++ b/drivers/bcma/Kconfig
+@@ -38,6 +38,11 @@ config BCMA_HOST_SOC
+ 	bool
+ 	depends on BCMA_DRIVER_MIPS
+ 
++config BCMA_SFLASH
++	bool
++	depends on BCMA_DRIVER_MIPS
++	default y
++
+ config BCMA_DRIVER_MIPS
+ 	bool "BCMA Broadcom MIPS core driver"
+ 	depends on BCMA && MIPS
+--- a/drivers/bcma/Makefile
++++ b/drivers/bcma/Makefile
+@@ -1,5 +1,6 @@
+ bcma-y					+= main.o scan.o core.o sprom.o
+ bcma-y					+= driver_chipcommon.o driver_chipcommon_pmu.o
++bcma-$(CONFIG_BCMA_SFLASH)		+= driver_chipcommon_sflash.o
+ bcma-y					+= driver_pci.o
+ bcma-$(CONFIG_BCMA_DRIVER_PCI_HOSTMODE)	+= driver_pci_host.o
+ bcma-$(CONFIG_BCMA_DRIVER_MIPS)		+= driver_mips.o
+--- a/drivers/bcma/bcma_private.h
++++ b/drivers/bcma/bcma_private.h
+@@ -42,6 +42,11 @@ void bcma_chipco_serial_init(struct bcma
+ u32 bcma_pmu_alp_clock(struct bcma_drv_cc *cc);
+ u32 bcma_pmu_get_clockcpu(struct bcma_drv_cc *cc);
+ 
++#ifdef CONFIG_BCMA_SFLASH
++/* driver_chipcommon_sflash.c */
++int bcma_sflash_init(struct bcma_drv_cc *cc);
++#endif /* CONFIG_BCMA_SFLASH */
++
+ #ifdef CONFIG_BCMA_HOST_PCI
+ /* host_pci.c */
+ extern int __init bcma_host_pci_init(void);
+--- /dev/null
++++ b/drivers/bcma/driver_chipcommon_sflash.c
+@@ -0,0 +1,398 @@
++/*
++ * Broadcom SiliconBackplane 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/bcma/bcma.h>
++#include <linux/bcma/bcma_driver_chipcommon.h>
++#include <linux/delay.h>
++
++#include "bcma_private.h"
++
++#define NUM_RETRIES	3
++
++
++/* Issue a serial flash command */
++static inline void bcma_sflash_cmd(struct bcma_drv_cc *cc, u32 opcode)
++{
++	bcma_cc_write32(cc, BCMA_CC_FLASHCTL,
++			BCMA_CC_FLASHCTL_START | opcode);
++	while (bcma_cc_read32(cc, BCMA_CC_FLASHCTL) & BCMA_CC_FLASHCTL_BUSY)
++		;
++}
++
++
++static inline 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);
++}
++
++/* Initialize serial flash access */
++int bcma_sflash_init(struct bcma_drv_cc *cc)
++{
++	u32 id, id2;
++
++	memset(&cc->sflash, 0, sizeof(struct bcma_sflash));
++
++	switch (cc->capabilities & BCMA_CC_CAP_FLASHT) {
++	case BCMA_CC_FLASHT_STSER:
++		/* Probe for ST chips */
++		bcma_sflash_cmd(cc, BCMA_CC_FLASHCTL_ST_DP);
++		bcma_cc_write32(cc, BCMA_CC_FLASHADDR, 0);
++		bcma_sflash_cmd(cc, BCMA_CC_FLASHCTL_ST_RES);
++		id = bcma_cc_read32(cc, BCMA_CC_FLASHDATA);
++		cc->sflash.blocksize = 64 * 1024;
++		switch (id) {
++		case 0x11:
++			/* ST M25P20 2 Mbit Serial Flash */
++			cc->sflash.numblocks = 4;
++			break;
++		case 0x12:
++			/* ST M25P40 4 Mbit Serial Flash */
++			cc->sflash.numblocks = 8;
++			break;
++		case 0x13:
++			/* ST M25P80 8 Mbit Serial Flash */
++			cc->sflash.numblocks = 16;
++			break;
++		case 0x14:
++			/* ST M25P16 16 Mbit Serial Flash */
++			cc->sflash.numblocks = 32;
++			break;
++		case 0x15:
++			/* ST M25P32 32 Mbit Serial Flash */
++			cc->sflash.numblocks = 64;
++			break;
++		case 0x16:
++			/* ST M25P64 64 Mbit Serial Flash */
++			cc->sflash.numblocks = 128;
++			break;
++		case 0x17:
++			/* ST M25FL128 128 Mbit Serial Flash */
++			cc->sflash.numblocks = 256;
++			break;
++		case 0xbf:
++			/* All of the following flashes are SST with
++			 * 4KB subsectors. Others should be added but
++			 * We'll have to revamp the way we identify them
++			 * since RES is not eough to disambiguate them.
++			 */
++			cc->sflash.blocksize = 4 * 1024;
++			bcma_cc_write32(cc, BCMA_CC_FLASHADDR, 1);
++			bcma_sflash_cmd(cc, BCMA_CC_FLASHCTL_ST_RES);
++			id2 = bcma_cc_read32(cc, BCMA_CC_FLASHDATA);
++			switch (id2) {
++			case 1:
++				/* SST25WF512 512 Kbit Serial Flash */
++			case 0x48:
++				/* SST25VF512 512 Kbit Serial Flash */
++				cc->sflash.numblocks = 16;
++				break;
++			case 2:
++				/* SST25WF010 1 Mbit Serial Flash */
++			case 0x49:
++				/* SST25VF010 1 Mbit Serial Flash */
++				cc->sflash.numblocks = 32;
++				break;
++			case 3:
++				/* SST25WF020 2 Mbit Serial Flash */
++			case 0x43:
++				/* SST25VF020 2 Mbit Serial Flash */
++				cc->sflash.numblocks = 64;
++				break;
++			case 4:
++				/* SST25WF040 4 Mbit Serial Flash */
++			case 0x44:
++				/* SST25VF040 4 Mbit Serial Flash */
++			case 0x8d:
++				/* SST25VF040B 4 Mbit Serial Flash */
++				cc->sflash.numblocks = 128;
++				break;
++			case 5:
++				/* SST25WF080 8 Mbit Serial Flash */
++			case 0x8e:
++				/* SST25VF080B 8 Mbit Serial Flash */
++				cc->sflash.numblocks = 256;
++				break;
++			case 0x41:
++				/* SST25VF016 16 Mbit Serial Flash */
++				cc->sflash.numblocks = 512;
++				break;
++			case 0x4a:
++				/* SST25VF032 32 Mbit Serial Flash */
++				cc->sflash.numblocks = 1024;
++				break;
++			case 0x4b:
++				/* SST25VF064 64 Mbit Serial Flash */
++				cc->sflash.numblocks = 2048;
++				break;
++			}
++			break;
++		}
++		break;
++
++	case BCMA_CC_FLASHT_ATSER:
++		/* Probe for Atmel chips */
++		bcma_sflash_cmd(cc, BCMA_CC_FLASHCTL_AT_STATUS);
++		id = bcma_cc_read32(cc, BCMA_CC_FLASHDATA) & 0x3c;
++		switch (id) {
++		case 0xc:
++			/* Atmel AT45DB011 1Mbit Serial Flash */
++			cc->sflash.blocksize = 256;
++			cc->sflash.numblocks = 512;
++			break;
++		case 0x14:
++			/* Atmel AT45DB021 2Mbit Serial Flash */
++			cc->sflash.blocksize = 256;
++			cc->sflash.numblocks = 1024;
++			break;
++		case 0x1c:
++			/* Atmel AT45DB041 4Mbit Serial Flash */
++			cc->sflash.blocksize = 256;
++			cc->sflash.numblocks = 2048;
++			break;
++		case 0x24:
++			/* Atmel AT45DB081 8Mbit Serial Flash */
++			cc->sflash.blocksize = 256;
++			cc->sflash.numblocks = 4096;
++			break;
++		case 0x2c:
++			/* Atmel AT45DB161 16Mbit Serial Flash */
++			cc->sflash.blocksize = 512;
++			cc->sflash.numblocks = 4096;
++			break;
++		case 0x34:
++			/* Atmel AT45DB321 32Mbit Serial Flash */
++			cc->sflash.blocksize = 512;
++			cc->sflash.numblocks = 8192;
++			break;
++		case 0x3c:
++			/* Atmel AT45DB642 64Mbit Serial Flash */
++			cc->sflash.blocksize = 1024;
++			cc->sflash.numblocks = 8192;
++			break;
++		}
++		break;
++	}
++
++	cc->sflash.size = cc->sflash.blocksize * cc->sflash.numblocks;
++
++	return cc->sflash.size ? 0 : -ENODEV;
++}
++
++/* Read len bytes starting at offset into buf. Returns number of bytes read. */
++int bcma_sflash_read(struct bcma_drv_cc *cc, u32 offset, u32 len, u8 *buf)
++{
++	u8 *from, *to;
++	u32 cnt, i;
++
++	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_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. */
++int bcma_sflash_poll(struct bcma_drv_cc *cc, u32 offset)
++{
++	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 bcma_drv_cc *cc, u32 offset, u32 len,
++			   const u8 *buf)
++{
++	int written = 1;
++
++	/* 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(cc, 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(cc, offset)) {
++		/* Flash rejected command */
++		return -EAGAIN;
++	}
++	return written;
++}
++
++static int sflash_at_write(struct bcma_drv_cc *cc, u32 offset, u32 len,
++			   const u8 *buf)
++{
++	struct bcma_sflash *sfl = &cc->sflash;
++	u32 page, byte, mask;
++	int ret = 0;
++
++	mask = sfl->blocksize - 1;
++	page = (offset & ~mask) << 1;
++	byte = offset & mask;
++	/* Read main memory page into buffer 1 */
++	if (byte || (len < sfl->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(cc, offset)) {
++			udelay(10);
++			i--;
++		}
++		BUG_ON(!bcma_sflash_poll(cc, offset));
++	}
++	/* Write into buffer 1 */
++	for (ret = 0; (ret < (int)len) && (byte < sfl->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.
++ */
++int bcma_sflash_write(struct bcma_drv_cc *cc, u32 offset, u32 len,
++		      const u8 *buf)
++{
++	struct bcma_sflash *sfl;
++	int ret = 0, tries = NUM_RETRIES;
++
++	if (!len)
++		return 0;
++
++	if ((offset + len) > cc->sflash.size)
++		return -EINVAL;
++
++	sfl = &cc->sflash;
++	switch (cc->capabilities & BCMA_CC_CAP_FLASHT) {
++	case BCMA_CC_FLASHT_STSER:
++		do {
++			ret = sflash_st_write(cc, offset, len, buf);
++			tries--;
++		} while (ret == -EAGAIN && tries > 0);
++
++		if (ret == -EAGAIN && tries == 0) {
++			pr_info("ST Flash rejected write\n");
++			ret = -EIO;
++		}
++		break;
++	case BCMA_CC_FLASHT_ATSER:
++		ret = sflash_at_write(cc, offset, len, buf);
++		break;
++	}
++
++	return ret;
++}
++
++/* Erase a region. Returns number of bytes scheduled for erasure.
++ * Caller should poll for completion.
++ */
++int bcma_sflash_erase(struct bcma_drv_cc *cc, u32 offset)
++{
++	struct bcma_sflash *sfl;
++
++	if (offset >= cc->sflash.size)
++		return -EINVAL;
++
++	sfl = &cc->sflash;
++	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 (sfl->blocksize < (64 * 1024))
++			bcma_sflash_cmd(cc, BCMA_CC_FLASHCTL_ST_SSE);
++		else
++			bcma_sflash_cmd(cc, BCMA_CC_FLASHCTL_ST_SE);
++		return sfl->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 sfl->blocksize;
++	}
++
++	return 0;
++}
+--- a/drivers/bcma/driver_mips.c
++++ b/drivers/bcma/driver_mips.c
+@@ -185,7 +185,13 @@ static void bcma_core_mips_flash_detect(
+ 	switch (bus->drv_cc.capabilities & BCMA_CC_CAP_FLASHT) {
+ 	case BCMA_CC_FLASHT_STSER:
+ 	case BCMA_CC_FLASHT_ATSER:
+-		pr_err("Serial flash not supported.\n");
++#ifdef CONFIG_BCMA_SFLASH
++		pr_info("found serial flash.\n");
++		bus->drv_cc.flash_type = BCMA_SFLASH;
++		bcma_sflash_init(&bus->drv_cc);
++#else
++		pr_info("serial flash not supported.\n");
++#endif /* CONFIG_BCMA_SFLASH */
+ 		break;
+ 	case BCMA_CC_FLASHT_PARA:
+ 		pr_info("found parallel flash.\n");
+--- a/include/linux/bcma/bcma_driver_chipcommon.h
++++ b/include/linux/bcma/bcma_driver_chipcommon.h
+@@ -399,6 +399,7 @@ struct bcma_chipcommon_pmu {
+ #ifdef CONFIG_BCMA_DRIVER_MIPS
+ enum bcma_flash_type {
+ 	BCMA_PFLASH,
++	BCMA_SFLASH,
+ };
+ 
+ struct bcma_pflash {
+@@ -407,6 +408,14 @@ struct bcma_pflash {
+ 	u32 window_size;
+ };
+ 
++#ifdef CONFIG_BCMA_SFLASH
++struct bcma_sflash {
++	u32 blocksize;		/* Block size */
++	u32 numblocks;		/* Number of blocks */
++	u32 size;		/* Total size in bytes */
++};
++#endif /* CONFIG_BCMA_SFLASH */
++
+ struct bcma_serial_port {
+ 	void *regs;
+ 	unsigned long clockspeed;
+@@ -429,6 +438,9 @@ struct bcma_drv_cc {
+ 	enum bcma_flash_type flash_type;
+ 	union {
+ 		struct bcma_pflash pflash;
++#ifdef CONFIG_BCMA_SFLASH
++		struct bcma_sflash sflash;
++#endif /* CONFIG_BCMA_SFLASH */
+ 	};
+ 
+ 	int nr_serial_ports;
+@@ -483,4 +495,14 @@ extern void bcma_chipco_chipctl_maskset(
+ extern void bcma_chipco_regctl_maskset(struct bcma_drv_cc *cc,
+ 				       u32 offset, u32 mask, u32 set);
+ 
++#ifdef CONFIG_BCMA_SFLASH
++/* Chipcommon sflash support. */
++int bcma_sflash_read(struct bcma_drv_cc *cc, u32 offset, u32 len,
++			   u8 *buf);
++int bcma_sflash_poll(struct bcma_drv_cc *cc, u32 offset);
++int bcma_sflash_write(struct bcma_drv_cc *cc, u32 offset, u32 len,
++			    const u8 *buf);
++int bcma_sflash_erase(struct bcma_drv_cc *cc, u32 offset);
++#endif /* CONFIG_BCMA_SFLASH */
++
+ #endif /* LINUX_BCMA_DRIVER_CC_H_ */