-From a62940e988526c881966a8c72cc28c95fca89f3c Mon Sep 17 00:00:00 2001
-From: Hauke Mehrtens <hauke@hauke-m.de>
-Date: Sun, 17 Jul 2011 14:53:07 +0200
-Subject: [PATCH 13/26] bcma: add serial flash support to bcma
-
-
-Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>
----
- drivers/bcma/Kconfig | 5 +
- drivers/bcma/Makefile | 1 +
- drivers/bcma/bcma_private.h | 5 +
- drivers/bcma/driver_chipcommon_sflash.c | 555 +++++++++++++++++++++++++++
- drivers/bcma/driver_mips.c | 8 +-
- include/linux/bcma/bcma_driver_chipcommon.h | 24 ++
- 6 files changed, 597 insertions(+), 1 deletions(-)
- create mode 100644 drivers/bcma/driver_chipcommon_sflash.c
-
--- a/drivers/bcma/Kconfig
+++ b/drivers/bcma/Kconfig
@@ -38,6 +38,11 @@ config BCMA_HOST_SOC
extern int __init bcma_host_pci_init(void);
--- /dev/null
+++ b/drivers/bcma/driver_chipcommon_sflash.c
-@@ -0,0 +1,555 @@
+@@ -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.
+
+
+static inline void bcma_sflash_write_u8(struct bcma_drv_cc *cc,
-+ u32 offset, u8 byte)
++ u32 offset, u8 byte)
+{
+ bcma_cc_write32(cc, BCMA_CC_FLASHADDR, offset);
+ bcma_cc_write32(cc, BCMA_CC_FLASHDATA, byte);
+}
+
+/* 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)
++int bcma_sflash_read(struct bcma_drv_cc *cc, u32 offset, u32 len, u8 *buf)
+{
+ u8 *from, *to;
+ u32 cnt, i;
+ else
+ cnt = len;
+
-+
-+ if (cc->core->id.rev == 12)
-+ from = (u8 *)KSEG1ADDR(BCMA_FLASH2 + offset);
-+ else
-+ from = (u8 *)KSEG0ADDR(BCMA_FLASH2 + offset);
++ from = (u8 *)KSEG0ADDR(BCMA_FLASH2 + offset);
+
+ to = (u8 *)buf;
+
+static int sflash_st_write(struct bcma_drv_cc *cc, u32 offset, u32 len,
+ const u8 *buf)
+{
-+ struct bcma_bus *bus = cc->core->bus;
-+ int ret = 0;
-+ bool is4712b0 = (bus->chipinfo.id == 0x4712) && (bus->chipinfo.rev == 3);
-+ u32 mask;
-+
++ int written = 1;
+
+ /* Enable writes */
+ bcma_sflash_cmd(cc, BCMA_CC_FLASHCTL_ST_WREN);
-+ if (is4712b0) {
-+ mask = 1 << 14;
-+ bcma_sflash_write_u8(cc, offset, *buf++);
-+ /* Set chip select */
-+ bcma_cc_set32(cc, BCMA_CC_GPIOOUT, mask);
-+ /* Issue a page program with the first byte */
-+ bcma_sflash_cmd(cc, BCMA_CC_FLASHCTL_ST_PP);
-+ ret = 1;
-+ offset++;
-+ len--;
-+ while (len > 0) {
-+ if ((offset & 255) == 0) {
-+ /* Page boundary, drop cs and return */
-+ bcma_cc_mask32(cc, BCMA_CC_GPIOOUT, ~mask);
-+ udelay(1);
-+ if (!bcma_sflash_poll(cc, offset)) {
-+ /* Flash rejected command */
-+ return -EAGAIN;
-+ }
-+ return ret;
-+ } else {
-+ /* Write single byte */
-+ bcma_sflash_cmd(cc, *buf++);
++ 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;
+ }
-+ ret++;
-+ offset++;
-+ len--;
-+ }
-+ /* All done, drop cs */
-+ bcma_cc_mask32(cc, BCMA_CC_GPIOOUT, ~mask);
-+ 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++);
+ }
-+ } else if (cc->core->id.rev >= 20) {
-+ 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);
-+ ret = 1;
++ written++;
+ 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 ret;
-+ } else {
-+ /* Write single byte */
-+ bcma_sflash_cmd(cc,
-+ BCMA_CC_FLASHCTL_ST_CSA |
-+ *buf++);
-+ }
-+ ret++;
-+ 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;
-+ }
-+ } else {
-+ ret = 1;
-+ bcma_sflash_write_u8(cc, offset, *buf);
-+ /* Page program */
-+ bcma_sflash_cmd(cc, BCMA_CC_FLASHCTL_ST_PP);
+ }
-+ return ret;
++ /* 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,
+ struct bcma_sflash *sfl = &cc->sflash;
+ u32 page, byte, mask;
+ int ret = 0;
++
+ mask = sfl->blocksize - 1;
+ page = (offset & ~mask) << 1;
+ byte = offset & mask;
+ /* 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);
++ 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);
+ * written. Caller should poll for completion.
+ */
+int bcma_sflash_write(struct bcma_drv_cc *cc, u32 offset, u32 len,
-+ const u8 *buf)
++ const u8 *buf)
+{
+ struct bcma_sflash *sfl;
+ int ret = 0, tries = NUM_RETRIES;
+ * with a new command: ST_SSE. The ST_SE command erases 64KB just as
+ * before.
+ */
-+ bcma_sflash_cmd(cc, (sfl->blocksize < (64 * 1024)) ? BCMA_CC_FLASHCTL_ST_SSE : BCMA_CC_FLASHCTL_ST_SE);
++ 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);
+
+ return 0;
+}
-+
-+/*
-+ * writes the appropriate range of flash, a NULL buf simply erases
-+ * the region of flash
-+ */
-+int bcma_sflash_commit(struct bcma_drv_cc *cc, u32 offset, u32 len,
-+ const u8 *buf)
-+{
-+ struct bcma_sflash *sfl;
-+ u8 *block = NULL, *cur_ptr, *blk_ptr;
-+ u32 blocksize = 0, mask, cur_offset, cur_length, cur_retlen, remainder;
-+ u32 blk_offset, blk_len, copied;
-+ int bytes, ret = 0;
-+
-+ /* Check address range */
-+ if (len <= 0)
-+ return 0;
-+
-+ sfl = &cc->sflash;
-+ if ((offset + len) > sfl->size)
-+ return -EINVAL;
-+
-+ blocksize = sfl->blocksize;
-+ mask = blocksize - 1;
-+
-+ /* Allocate a block of mem */
-+ block = kmalloc(blocksize, GFP_KERNEL);
-+ if (!block)
-+ return -ENOMEM;
-+
-+ while (len) {
-+ /* Align offset */
-+ cur_offset = offset & ~mask;
-+ cur_length = blocksize;
-+ cur_ptr = block;
-+
-+ remainder = blocksize - (offset & mask);
-+ if (len < remainder)
-+ cur_retlen = len;
-+ else
-+ cur_retlen = remainder;
-+
-+ /* buf == NULL means erase only */
-+ if (buf) {
-+ /* Copy existing data into holding block if necessary */
-+ if ((offset & mask) || (len < blocksize)) {
-+ blk_offset = cur_offset;
-+ blk_len = cur_length;
-+ blk_ptr = cur_ptr;
-+
-+ /* Copy entire block */
-+ while (blk_len) {
-+ copied = bcma_sflash_read(cc,
-+ blk_offset,
-+ blk_len, blk_ptr);
-+ blk_offset += copied;
-+ blk_len -= copied;
-+ blk_ptr += copied;
-+ }
-+ }
-+
-+ /* Copy input data into holding block */
-+ memcpy(cur_ptr + (offset & mask), buf, cur_retlen);
-+ }
-+
-+ /* Erase block */
-+ ret = bcma_sflash_erase(cc, cur_offset);
-+ if (ret < 0)
-+ goto done;
-+
-+ while (bcma_sflash_poll(cc, cur_offset));
-+
-+ /* buf == NULL means erase only */
-+ if (!buf) {
-+ offset += cur_retlen;
-+ len -= cur_retlen;
-+ continue;
-+ }
-+
-+ /* Write holding block */
-+ while (cur_length > 0) {
-+ bytes = bcma_sflash_write(cc, cur_offset,
-+ cur_length, cur_ptr);
-+
-+ if (bytes < 0) {
-+ ret = bytes;
-+ goto done;
-+ }
-+
-+ while (bcma_sflash_poll(cc, cur_offset))
-+ ;
-+
-+ cur_offset += bytes;
-+ cur_length -= bytes;
-+ cur_ptr += bytes;
-+ }
-+
-+ offset += cur_retlen;
-+ len -= cur_retlen;
-+ buf += cur_retlen;
-+ }
-+
-+ ret = len;
-+done:
-+ kfree(block);
-+ return ret;
-+}
--- a/drivers/bcma/driver_mips.c
+++ b/drivers/bcma/driver_mips.c
@@ -185,7 +185,13 @@ static void bcma_core_mips_flash_detect(
};
int nr_serial_ports;
-@@ -459,4 +471,16 @@ extern void bcma_chipco_chipctl_maskset(
+@@ -459,4 +471,14 @@ extern void bcma_chipco_chipctl_maskset(
extern void bcma_chipco_regctl_maskset(struct bcma_drv_cc *cc,
u32 offset, u32 mask, u32 set);
+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);
-+int bcma_sflash_commit(struct bcma_drv_cc *cc, u32 offset, u32 len,
-+ const u8 *buf);
+#endif /* CONFIG_BCMA_SFLASH */
+
#endif /* LINUX_BCMA_DRIVER_CC_H_ */
projects / openwrt.git / blobdiff