diff options
Diffstat (limited to 'target/linux/brcm47xx/patches-3.10/053-mtd_bcm47xxsflash_writing_support.patch')
| -rw-r--r-- | target/linux/brcm47xx/patches-3.10/053-mtd_bcm47xxsflash_writing_support.patch | 160 |
1 files changed, 0 insertions, 160 deletions
diff --git a/target/linux/brcm47xx/patches-3.10/053-mtd_bcm47xxsflash_writing_support.patch b/target/linux/brcm47xx/patches-3.10/053-mtd_bcm47xxsflash_writing_support.patch deleted file mode 100644 index 1938a4177f..0000000000 --- a/target/linux/brcm47xx/patches-3.10/053-mtd_bcm47xxsflash_writing_support.patch +++ /dev/null @@ -1,160 +0,0 @@ -From: =?UTF-8?q?Rafa=C5=82=20Mi=C5=82ecki?= <zajec5@gmail.com> -Subject: [RFC][PATCH] mtd: bcm47xxsflash: writing support -Date: Wed, 22 May 2013 14:39:02 +0200 - ---- - drivers/mtd/devices/bcm47xxsflash.c | 130 +++++++++++++++++++++++++++++++++-- - 1 file changed, 126 insertions(+), 4 deletions(-) - ---- a/drivers/mtd/devices/bcm47xxsflash.c -+++ b/drivers/mtd/devices/bcm47xxsflash.c -@@ -116,6 +116,127 @@ static int bcm47xxsflash_read(struct mtd - return len; - } - -+static int bcm47xxsflash_write_st(struct mtd_info *mtd, u32 offset, size_t len, -+ const u_char *buf) -+{ -+ struct bcm47xxsflash *b47s = mtd->priv; -+ int written = 0; -+ -+ /* Enable writes */ -+ bcm47xxsflash_cmd(b47s, OPCODE_ST_WREN); -+ -+ /* Write first byte */ -+ b47s->cc_write(b47s, BCMA_CC_FLASHADDR, offset); -+ b47s->cc_write(b47s, BCMA_CC_FLASHDATA, *buf++); -+ -+ /* Program page */ -+ if (b47s->bcma_cc->core->id.rev < 20) { -+ bcm47xxsflash_cmd(b47s, OPCODE_ST_PP); -+ return 1; /* 1B written */ -+ } -+ -+ /* Program page and set CSA (on newer chips we can continue writing) */ -+ bcm47xxsflash_cmd(b47s, OPCODE_ST_CSA | OPCODE_ST_PP); -+ offset++; -+ len--; -+ written++; -+ -+ while (len > 0) { -+ /* Page boundary, another function call is needed */ -+ if ((offset & 0xFF) == 0) -+ break; -+ -+ bcm47xxsflash_cmd(b47s, OPCODE_ST_CSA | *buf++); -+ offset++; -+ len--; -+ written++; -+ } -+ -+ /* All done, drop CSA & poll */ -+ b47s->cc_write(b47s, BCMA_CC_FLASHCTL, 0); -+ udelay(1); -+ if (bcm47xxsflash_poll(b47s, HZ / 10)) -+ pr_err("Flash rejected dropping CSA\n"); -+ -+ return written; -+} -+ -+static int bcm47xxsflash_write_at(struct mtd_info *mtd, u32 offset, size_t len, -+ const u_char *buf) -+{ -+ struct bcm47xxsflash *b47s = mtd->priv; -+ u32 mask = b47s->blocksize - 1; -+ u32 page = (offset & ~mask) << 1; -+ u32 byte = offset & mask; -+ int written = 0; -+ -+ /* If we don't overwrite whole page, read it to the buffer first */ -+ if (byte || (len < b47s->blocksize)) { -+ int err; -+ -+ b47s->cc_write(b47s, BCMA_CC_FLASHADDR, page); -+ bcm47xxsflash_cmd(b47s, OPCODE_AT_BUF1_LOAD); -+ /* 250 us for AT45DB321B */ -+ err = bcm47xxsflash_poll(b47s, HZ / 1000); -+ if (err) { -+ pr_err("Timeout reading page 0x%X info buffer\n", page); -+ return err; -+ } -+ } -+ -+ /* Change buffer content with our data */ -+ while (len > 0) { -+ /* Page boundary, another function call is needed */ -+ if (byte == b47s->blocksize) -+ break; -+ -+ b47s->cc_write(b47s, BCMA_CC_FLASHADDR, byte++); -+ b47s->cc_write(b47s, BCMA_CC_FLASHDATA, *buf++); -+ bcm47xxsflash_cmd(b47s, OPCODE_AT_BUF1_WRITE); -+ len--; -+ written++; -+ } -+ -+ /* Program page with the buffer content */ -+ b47s->cc_write(b47s, BCMA_CC_FLASHADDR, page); -+ bcm47xxsflash_cmd(b47s, OPCODE_AT_BUF1_PROGRAM); -+ -+ return written; -+} -+ -+static int bcm47xxsflash_write(struct mtd_info *mtd, loff_t to, size_t len, -+ size_t *retlen, const u_char *buf) -+{ -+ struct bcm47xxsflash *b47s = mtd->priv; -+ int written; -+ -+ /* Writing functions can return without writing all passed data, for -+ * example when the hardware is too old or when we git page boundary. -+ */ -+ while (len > 0) { -+ switch (b47s->type) { -+ case BCM47XXSFLASH_TYPE_ST: -+ written = bcm47xxsflash_write_st(mtd, to, len, buf); -+ break; -+ case BCM47XXSFLASH_TYPE_ATMEL: -+ written = bcm47xxsflash_write_at(mtd, to, len, buf); -+ break; -+ default: -+ BUG_ON(1); -+ } -+ if (written < 0) { -+ pr_err("Error writing at offset 0x%llX\n", to); -+ return written; -+ } -+ to += (loff_t)written; -+ len -= written; -+ *retlen += written; -+ buf += written; -+ } -+ -+ return 0; -+} -+ - static void bcm47xxsflash_fill_mtd(struct bcm47xxsflash *b47s) - { - struct mtd_info *mtd = &b47s->mtd; -@@ -123,16 +244,17 @@ static void bcm47xxsflash_fill_mtd(struc - mtd->priv = b47s; - mtd->name = "bcm47xxsflash"; - mtd->owner = THIS_MODULE; -- mtd->type = MTD_ROM; - -- /* TODO: implement writing support and verify/change following code */ -- mtd->flags = MTD_CAP_ROM; -+ mtd->type = MTD_NORFLASH; -+ mtd->flags = MTD_CAP_NORFLASH; - mtd->size = b47s->size; - mtd->erasesize = b47s->blocksize; -- mtd->writebufsize = mtd->writesize = 1; -+ mtd->writesize = 1; -+ mtd->writebufsize = 1; - - mtd->_erase = bcm47xxsflash_erase; - mtd->_read = bcm47xxsflash_read; -+ mtd->_write = bcm47xxsflash_write; - } - - /************************************************** |