-From 980da78179592a3f5f99168bc5af415835aa8c13 Mon Sep 17 00:00:00 2001
-From: Hauke Mehrtens <hauke@hauke-m.de>
-Date: Sun, 24 Jul 2011 20:20:36 +0200
-Subject: [PATCH 15/26] ssb: add serial flash support
-
-
-Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>
----
- drivers/ssb/Kconfig | 6 +
- drivers/ssb/Makefile | 1 +
- drivers/ssb/driver_chipcommon_sflash.c | 556 +++++++++++++++++++++++++++++
- drivers/ssb/driver_mipscore.c | 6 +
- drivers/ssb/ssb_private.h | 4 +
- include/linux/ssb/ssb_driver_chipcommon.h | 30 ++-
- 6 files changed, 601 insertions(+), 2 deletions(-)
- create mode 100644 drivers/ssb/driver_chipcommon_sflash.c
-
--- a/drivers/ssb/Kconfig
+++ b/drivers/ssb/Kconfig
@@ -137,6 +137,12 @@ config SSB_DRIVER_MIPS
ssb-$(CONFIG_SSB_DRIVER_PCICORE) += driver_pcicore.o
--- /dev/null
+++ b/drivers/ssb/driver_chipcommon_sflash.c
-@@ -0,0 +1,556 @@
+@@ -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.
+
+
+static inline void ssb_sflash_write_u8(struct ssb_chipcommon *cc,
-+ u32 offset, u8 byte)
++ u32 offset, u8 byte)
+{
+ chipco_write32(cc, SSB_CHIPCO_FLASHADDR, offset);
+ chipco_write32(cc, SSB_CHIPCO_FLASHDATA, byte);
+}
+
+/* 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)
++int ssb_sflash_read(struct ssb_chipcommon *cc, u32 offset, u32 len, u8 *buf)
+{
+ u8 *from, *to;
+ u32 cnt, i;
+ 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) {
+ 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.
++ /* 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.
+ */
-+ ssb_sflash_cmd(cc, (sfl->blocksize < (64 * 1024)) ? SSB_CHIPCO_FLASHCTL_ST_SSE : SSB_CHIPCO_FLASHCTL_ST_SE);
++ 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);
+
+ return 0;
+}
-+
-+/*
-+ * writes the appropriate range of flash, a NULL buf simply erases
-+ * the region of flash
-+ */
-+int ssb_sflash_commit(struct ssb_chipcommon *cc, u32 offset, u32 len,
-+ const u8 *buf)
-+{
-+ struct ssb_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 = ssb_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 = ssb_sflash_erase(cc, cur_offset);
-+ if (ret < 0)
-+ goto done;
-+
-+ while (ssb_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 = ssb_sflash_write(cc, cur_offset,
-+ cur_length, cur_ptr);
-+
-+ if (bytes < 0) {
-+ ret = bytes;
-+ goto done;
-+ }
-+
-+ while (ssb_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/ssb/driver_mipscore.c
+++ b/drivers/ssb/driver_mipscore.c
@@ -203,7 +203,13 @@ static void ssb_mips_flash_detect(struct
};
#endif /* CONFIG_SSB_DRIVER_MIPS */
};
-@@ -666,6 +680,18 @@ extern int ssb_chipco_serial_init(struct
+@@ -666,6 +680,16 @@ extern int ssb_chipco_serial_init(struct
struct ssb_serial_port *ports);
#endif /* CONFIG_SSB_SERIAL */
+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);
-+int ssb_sflash_commit(struct ssb_chipcommon *cc, u32 offset, u32 len,
-+ const u8 *buf);
+#endif /* CONFIG_SSB_SFLASH */
+
/* PMU support */
projects / openwrt.git / blobdiff