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openwrt_archive/target/linux/brcm47xx/patches-3.3/021-bcma-add-serial-flash-support-to-bcma.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

506 lines
13 KiB
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--- a/drivers/bcma/Kconfig
+++ b/drivers/bcma/Kconfig
@@ -39,6 +39,11 @@ 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
@@ -55,6 +55,11 @@ void bcma_chipco_serial_init(struct bcma
u32 bcma_pmu_get_alp_clock(struct bcma_drv_cc *cc);
u32 bcma_pmu_get_cpu_clock(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) {
+ bcma_info(cc->core->bus, "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
@@ -214,7 +214,13 @@ 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:
- bcma_err(bus, "Serial flash not supported.\n");
+#ifdef CONFIG_BCMA_SFLASH
+ bcma_info(bus, "found serial flash.\n");
+ bus->drv_cc.flash_type = BCMA_SFLASH;
+ bcma_sflash_init(&bus->drv_cc);
+#else
+ bcma_info(bus, "serial flash not supported.\n");
+#endif /* CONFIG_BCMA_SFLASH */
break;
case BCMA_CC_FLASHT_PARA:
bcma_info(bus, "found parallel flash.\n");
--- a/include/linux/bcma/bcma_driver_chipcommon.h
+++ b/include/linux/bcma/bcma_driver_chipcommon.h
@@ -579,6 +579,7 @@ struct bcma_chipcommon_pmu {
#ifdef CONFIG_BCMA_DRIVER_MIPS
enum bcma_flash_type {
BCMA_PFLASH,
+ BCMA_SFLASH,
};
struct bcma_pflash {
@@ -587,6 +588,14 @@ 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;
@@ -610,6 +619,9 @@ 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;
@@ -680,4 +692,14 @@ extern void bcma_pmu_spuravoid_pllupdate
extern u32 bcma_pmu_get_bus_clock(struct bcma_drv_cc *cc);
+#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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