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openwrt_archive/target/linux/brcm47xx/patches-3.3/023-ssb-add-serial-flash-support.patch
Hauke Mehrtens aa39a43602 kernel: update bcma and ssb to wireless-testing/master master-2013-07-03 
This updates 025-bcma_backport.patch and 020-ssb_update.patch to a 
version of ssb and bcma used in recent wireless-testing. I removed all 
patches adding serial and nand flash support before doing so to not 
conflict with the existing flash support in the brcm47xx target. This 
update was done to easily update the wireless drivers afterwards.

Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>


SVN-Revision: 37261
2013-07-11 22:20:26 +00:00

574 lines
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--- a/drivers/ssb/Kconfig
+++ b/drivers/ssb/Kconfig
@@ -137,6 +137,12 @@ config SSB_DRIVER_MIPS
If unsure, say N
+config SSB_SFLASH
+ bool
+ depends on SSB_DRIVER_MIPS
+ default y
+
+
# Assumption: We are on embedded, if we compile the MIPS core.
config SSB_EMBEDDED
bool
--- a/drivers/ssb/Makefile
+++ b/drivers/ssb/Makefile
@@ -11,6 +11,7 @@ ssb-$(CONFIG_SSB_SDIOHOST) += sdio.o
# built-in drivers
ssb-y += driver_chipcommon.o
ssb-y += driver_chipcommon_pmu.o
+ssb-$(CONFIG_SSB_SFLASH) += driver_chipcommon_sflash.o
ssb-$(CONFIG_SSB_DRIVER_MIPS) += driver_mipscore.o
ssb-$(CONFIG_SSB_DRIVER_EXTIF) += driver_extif.o
ssb-$(CONFIG_SSB_DRIVER_PCICORE) += driver_pcicore.o
--- /dev/null
+++ b/drivers/ssb/driver_chipcommon_sflash.c
@@ -0,0 +1,451 @@
+/*
+ * 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/ssb/ssb.h>
+#include <linux/ssb/ssb_driver_chipcommon.h>
+#include <linux/delay.h>
+
+#include "ssb_private.h"
+
+#define NUM_RETRIES 3
+
+
+/* Issue a serial flash command */
+static inline void ssb_sflash_cmd(struct ssb_chipcommon *cc, u32 opcode)
+{
+ chipco_write32(cc, SSB_CHIPCO_FLASHCTL,
+ SSB_CHIPCO_FLASHCTL_START | opcode);
+ while (chipco_read32(cc, SSB_CHIPCO_FLASHCTL)
+ & SSB_CHIPCO_FLASHCTL_BUSY)
+ ;
+}
+
+
+static inline void ssb_sflash_write_u8(struct ssb_chipcommon *cc,
+ u32 offset, u8 byte)
+{
+ chipco_write32(cc, SSB_CHIPCO_FLASHADDR, offset);
+ chipco_write32(cc, SSB_CHIPCO_FLASHDATA, byte);
+}
+
+/* Initialize serial flash access */
+int ssb_sflash_init(struct ssb_chipcommon *cc)
+{
+ u32 id, id2;
+
+ memset(&cc->sflash, 0, sizeof(struct ssb_sflash));
+
+ switch (cc->capabilities & SSB_CHIPCO_CAP_FLASHT) {
+ case SSB_CHIPCO_FLASHT_STSER:
+ /* Probe for ST chips */
+ ssb_sflash_cmd(cc, SSB_CHIPCO_FLASHCTL_ST_DP);
+ chipco_write32(cc, SSB_CHIPCO_FLASHADDR, 0);
+ ssb_sflash_cmd(cc, SSB_CHIPCO_FLASHCTL_ST_RES);
+ id = chipco_read32(cc, SSB_CHIPCO_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;
+ chipco_write32(cc, SSB_CHIPCO_FLASHADDR, 1);
+ ssb_sflash_cmd(cc, SSB_CHIPCO_FLASHCTL_ST_RES);
+ id2 = chipco_read32(cc, SSB_CHIPCO_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 SSB_CHIPCO_FLASHT_ATSER:
+ /* Probe for Atmel chips */
+ ssb_sflash_cmd(cc, SSB_CHIPCO_FLASHCTL_AT_STATUS);
+ id = chipco_read32(cc, SSB_CHIPCO_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 ssb_sflash_read(struct ssb_chipcommon *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;
+
+
+ if (cc->dev->id.revision == 12)
+ from = (u8 *)KSEG1ADDR(SSB_FLASH2 + offset);
+ else
+ from = (u8 *)KSEG0ADDR(SSB_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 ssb_sflash_poll(struct ssb_chipcommon *cc, u32 offset)
+{
+ if (offset >= cc->sflash.size)
+ return -22;
+
+ switch (cc->capabilities & SSB_CHIPCO_CAP_FLASHT) {
+ case SSB_CHIPCO_FLASHT_STSER:
+ /* Check for ST Write In Progress bit */
+ ssb_sflash_cmd(cc, SSB_CHIPCO_FLASHCTL_ST_RDSR);
+ return chipco_read32(cc, SSB_CHIPCO_FLASHDATA)
+ & SSB_CHIPCO_FLASHSTA_ST_WIP;
+ case SSB_CHIPCO_FLASHT_ATSER:
+ /* Check for Atmel Ready bit */
+ ssb_sflash_cmd(cc, SSB_CHIPCO_FLASHCTL_AT_STATUS);
+ return !(chipco_read32(cc, SSB_CHIPCO_FLASHDATA)
+ & SSB_CHIPCO_FLASHSTA_AT_READY);
+ }
+
+ return 0;
+}
+
+
+static int sflash_st_write(struct ssb_chipcommon *cc, u32 offset, u32 len,
+ const u8 *buf)
+{
+ struct ssb_bus *bus = cc->dev->bus;
+ int ret = 0;
+ bool is4712b0 = (bus->chip_id == 0x4712) && (bus->chip_rev == 3);
+ u32 mask;
+
+ /* Enable writes */
+ ssb_sflash_cmd(cc, SSB_CHIPCO_FLASHCTL_ST_WREN);
+ if (is4712b0) {
+ mask = 1 << 14;
+ ssb_sflash_write_u8(cc, offset, *buf++);
+ /* Set chip select */
+ chipco_set32(cc, SSB_CHIPCO_GPIOOUT, mask);
+ /* Issue a page program with the first byte */
+ ssb_sflash_cmd(cc, SSB_CHIPCO_FLASHCTL_ST_PP);
+ ret = 1;
+ offset++;
+ len--;
+ while (len > 0) {
+ if ((offset & 255) == 0) {
+ /* Page boundary, drop cs and return */
+ chipco_mask32(cc, SSB_CHIPCO_GPIOOUT, ~mask);
+ udelay(1);
+ if (!ssb_sflash_poll(cc, offset)) {
+ /* Flash rejected command */
+ return -EAGAIN;
+ }
+ return ret;
+ } else {
+ /* Write single byte */
+ ssb_sflash_cmd(cc, *buf++);
+ }
+ ret++;
+ offset++;
+ len--;
+ }
+ /* All done, drop cs */
+ chipco_mask32(cc, SSB_CHIPCO_GPIOOUT, ~mask);
+ udelay(1);
+ if (!ssb_sflash_poll(cc, offset)) {
+ /* Flash rejected command */
+ return -EAGAIN;
+ }
+ } else if (cc->dev->id.revision >= 20) {
+ ssb_sflash_write_u8(cc, offset, *buf++);
+ /* Issue a page program with CSA bit set */
+ ssb_sflash_cmd(cc,
+ SSB_CHIPCO_FLASHCTL_ST_CSA |
+ SSB_CHIPCO_FLASHCTL_ST_PP);
+ ret = 1;
+ offset++;
+ len--;
+ while (len > 0) {
+ if ((offset & 255) == 0) {
+ /* Page boundary, poll droping cs and return */
+ chipco_write32(cc, SSB_CHIPCO_FLASHCTL, 0);
+ udelay(1);
+ if (!ssb_sflash_poll(cc, offset)) {
+ /* Flash rejected command */
+ return -EAGAIN;
+ }
+ return ret;
+ } else {
+ /* Write single byte */
+ ssb_sflash_cmd(cc,
+ SSB_CHIPCO_FLASHCTL_ST_CSA |
+ *buf++);
+ }
+ ret++;
+ offset++;
+ len--;
+ }
+ /* All done, drop cs & poll */
+ chipco_write32(cc, SSB_CHIPCO_FLASHCTL, 0);
+ udelay(1);
+ if (!ssb_sflash_poll(cc, offset)) {
+ /* Flash rejected command */
+ return -EAGAIN;
+ }
+ } else {
+ ret = 1;
+ ssb_sflash_write_u8(cc, offset, *buf);
+ /* Page program */
+ ssb_sflash_cmd(cc, SSB_CHIPCO_FLASHCTL_ST_PP);
+ }
+ return ret;
+}
+
+static int sflash_at_write(struct ssb_chipcommon *cc, u32 offset, u32 len,
+ const u8 *buf)
+{
+ struct ssb_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;
+ chipco_write32(cc, SSB_CHIPCO_FLASHADDR, page);
+ ssb_sflash_cmd(cc, SSB_CHIPCO_FLASHCTL_AT_BUF1_LOAD);
+ /* 250 us for AT45DB321B */
+ while (i > 0 && ssb_sflash_poll(cc, offset)) {
+ udelay(10);
+ i--;
+ }
+ BUG_ON(!ssb_sflash_poll(cc, offset));
+ }
+ /* Write into buffer 1 */
+ for (ret = 0; (ret < (int)len) && (byte < sfl->blocksize); ret++) {
+ ssb_sflash_write_u8(cc, byte++, *buf++);
+ ssb_sflash_cmd(cc,
+ SSB_CHIPCO_FLASHCTL_AT_BUF1_WRITE);
+ }
+ /* Write buffer 1 into main memory page */
+ chipco_write32(cc, SSB_CHIPCO_FLASHADDR, page);
+ ssb_sflash_cmd(cc, SSB_CHIPCO_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 ssb_sflash_write(struct ssb_chipcommon *cc, u32 offset, u32 len,
+ const u8 *buf)
+{
+ struct ssb_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 & SSB_CHIPCO_CAP_FLASHT) {
+ case SSB_CHIPCO_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 SSB_CHIPCO_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 ssb_sflash_erase(struct ssb_chipcommon *cc, u32 offset)
+{
+ struct ssb_sflash *sfl;
+
+ if (offset >= cc->sflash.size)
+ return -EINVAL;
+
+ sfl = &cc->sflash;
+ switch (cc->capabilities & SSB_CHIPCO_CAP_FLASHT) {
+ case SSB_CHIPCO_FLASHT_STSER:
+ ssb_sflash_cmd(cc, SSB_CHIPCO_FLASHCTL_ST_WREN);
+ chipco_write32(cc, SSB_CHIPCO_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))
+ ssb_sflash_cmd(cc, SSB_CHIPCO_FLASHCTL_ST_SSE);
+ else
+ ssb_sflash_cmd(cc, SSB_CHIPCO_FLASHCTL_ST_SE);
+ return sfl->blocksize;
+ case SSB_CHIPCO_FLASHT_ATSER:
+ chipco_write32(cc, SSB_CHIPCO_FLASHADDR, offset << 1);
+ ssb_sflash_cmd(cc, SSB_CHIPCO_FLASHCTL_AT_PAGE_ERASE);
+ return sfl->blocksize;
+ }
+
+ return 0;
+}
--- a/drivers/ssb/driver_mipscore.c
+++ b/drivers/ssb/driver_mipscore.c
@@ -203,7 +203,13 @@ static void ssb_mips_flash_detect(struct
switch (bus->chipco.capabilities & SSB_CHIPCO_CAP_FLASHT) {
case SSB_CHIPCO_FLASHT_STSER:
case SSB_CHIPCO_FLASHT_ATSER:
+#ifdef CONFIG_SSB_SFLASH
+ pr_info("found serial flash.\n");
+ bus->chipco.flash_type = SSB_SFLASH;
+ ssb_sflash_init(&bus->chipco);
+#else
pr_info("serial flash not supported.\n");
+#endif /* CONFIG_SSB_SFLASH */
break;
case SSB_CHIPCO_FLASHT_PARA:
pr_info("found parallel flash.\n");
--- a/drivers/ssb/ssb_private.h
+++ b/drivers/ssb/ssb_private.h
@@ -204,6 +204,10 @@ extern int ssb_devices_freeze(struct ssb
extern int ssb_devices_thaw(struct ssb_freeze_context *ctx);
+#ifdef CONFIG_SSB_SFLASH
+/* driver_chipcommon_sflash.c */
+int ssb_sflash_init(struct ssb_chipcommon *cc);
+#endif /* CONFIG_SSB_SFLASH */
/* b43_pci_bridge.c */
#ifdef CONFIG_SSB_B43_PCI_BRIDGE
--- a/include/linux/ssb/ssb_driver_chipcommon.h
+++ b/include/linux/ssb/ssb_driver_chipcommon.h
@@ -504,8 +504,10 @@
#define SSB_CHIPCO_FLASHCTL_ST_PP 0x0302 /* Page Program */
#define SSB_CHIPCO_FLASHCTL_ST_SE 0x02D8 /* Sector Erase */
#define SSB_CHIPCO_FLASHCTL_ST_BE 0x00C7 /* Bulk Erase */
-#define SSB_CHIPCO_FLASHCTL_ST_DP 0x00B9 /* Deep Power-down */
-#define SSB_CHIPCO_FLASHCTL_ST_RSIG 0x03AB /* Read Electronic Signature */
+#define SSB_CHIPCO_FLASHCTL_ST_DP 0x00D9 /* Deep Power-down */
+#define SSB_CHIPCO_FLASHCTL_ST_RES 0x03AB /* Read Electronic Signature */
+#define SSB_CHIPCO_FLASHCTL_ST_CSA 0x1000 /* Keep chip select asserted */
+#define SSB_CHIPCO_FLASHCTL_ST_SSE 0x0220 /* Sub-sector Erase */
/* Status register bits for ST flashes */
#define SSB_CHIPCO_FLASHSTA_ST_WIP 0x01 /* Write In Progress */
@@ -586,6 +588,7 @@ struct ssb_chipcommon_pmu {
#ifdef CONFIG_SSB_DRIVER_MIPS
enum ssb_flash_type {
SSB_PFLASH,
+ SSB_SFLASH,
};
struct ssb_pflash {
@@ -593,6 +596,14 @@ struct ssb_pflash {
u32 window;
u32 window_size;
};
+
+#ifdef CONFIG_SSB_SFLASH
+struct ssb_sflash {
+ u32 blocksize; /* Block size */
+ u32 numblocks; /* Number of blocks */
+ u32 size; /* Total size in bytes */
+};
+#endif /* CONFIG_SSB_SFLASH */
#endif /* CONFIG_SSB_DRIVER_MIPS */
struct ssb_chipcommon {
@@ -609,6 +620,9 @@ struct ssb_chipcommon {
enum ssb_flash_type flash_type;
union {
struct ssb_pflash pflash;
+#ifdef CONFIG_SSB_SFLASH
+ struct ssb_sflash sflash;
+#endif /* CONFIG_SSB_SFLASH */
};
#endif /* CONFIG_SSB_DRIVER_MIPS */
};
@@ -671,6 +685,16 @@ extern int ssb_chipco_serial_init(struct
struct ssb_serial_port *ports);
#endif /* CONFIG_SSB_SERIAL */
+#ifdef CONFIG_SSB_SFLASH
+/* Chipcommon sflash support. */
+int ssb_sflash_read(struct ssb_chipcommon *cc, u32 offset, u32 len,
+ u8 *buf);
+int ssb_sflash_poll(struct ssb_chipcommon *cc, u32 offset);
+int ssb_sflash_write(struct ssb_chipcommon *cc, u32 offset, u32 len,
+ const u8 *buf);
+int ssb_sflash_erase(struct ssb_chipcommon *cc, u32 offset);
+#endif /* CONFIG_SSB_SFLASH */
+
/* PMU support */
extern void ssb_pmu_init(struct ssb_chipcommon *cc);
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