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-rw-r--r--target/linux/brcm47xx/patches-3.3/021-bcma-add-serial-flash-support-to-bcma.patch505
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_ */
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