+++ /dev/null
---- 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
-@@ -51,6 +51,11 @@ 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) {
-+ 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
-@@ -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:
-- 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
-@@ -435,6 +435,7 @@ struct bcma_chipcommon_pmu {
- #ifdef CONFIG_BCMA_DRIVER_MIPS
- enum bcma_flash_type {
- BCMA_PFLASH,
-+ BCMA_SFLASH,
- };
-
- struct bcma_pflash {
-@@ -443,6 +444,14 @@ 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;
-@@ -465,6 +474,9 @@ 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;
-@@ -520,4 +532,14 @@ extern void bcma_chipco_regctl_maskset(s
- u32 offset, u32 mask, u32 set);
- extern void bcma_pmu_spuravoid_pllupdate(struct bcma_drv_cc *cc, int spuravoid);
-
-+#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_ */
projects / openwrt.git / blobdiff