diff options
Diffstat (limited to 'target/linux/sunxi/patches-4.1/129-nand-sunxi-fix-write-to-USER_DATA-a13.patch')
| -rw-r--r-- | target/linux/sunxi/patches-4.1/129-nand-sunxi-fix-write-to-USER_DATA-a13.patch | 78 |
1 files changed, 78 insertions, 0 deletions
diff --git a/target/linux/sunxi/patches-4.1/129-nand-sunxi-fix-write-to-USER_DATA-a13.patch b/target/linux/sunxi/patches-4.1/129-nand-sunxi-fix-write-to-USER_DATA-a13.patch new file mode 100644 index 0000000..ae2775d --- /dev/null +++ b/target/linux/sunxi/patches-4.1/129-nand-sunxi-fix-write-to-USER_DATA-a13.patch @@ -0,0 +1,78 @@ +From b1488f1a55da6a297ac4e8e9140922f35b7583c5 Mon Sep 17 00:00:00 2001 +From: Boris Brezillon <boris.brezillon@free-electrons.com> +Date: Mon, 15 Jun 2015 11:09:58 +0200 +Subject: [PATCH] nand: sunxi: fix write to USER_DATA reg + +The USER_DATA register cannot be updated with readb on A13 SoCs, thus +triggering a bug when using memcpy_toio on this register. +Use writel (plus a temporary variable to old the USER_DATA value) to +address that problem. + +Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com> +--- + drivers/mtd/nand/sunxi_nand.c | 38 +++++++++++++++++++++----------------- + 1 file changed, 21 insertions(+), 17 deletions(-) + +--- a/drivers/mtd/nand/sunxi_nand.c ++++ b/drivers/mtd/nand/sunxi_nand.c +@@ -908,7 +908,7 @@ static int sunxi_nfc_hw_ecc_write_page(s + + for (i = 0; i < ecc->steps; i++) { + bool rndactiv = false; +- u8 oob_buf[4]; ++ u32 user_data; + + if (i) + chip->cmdfunc(mtd, NAND_CMD_RNDIN, i * ecc->size, -1); +@@ -919,15 +919,13 @@ static int sunxi_nfc_hw_ecc_write_page(s + offset = layout->eccpos[i * ecc->bytes] - 4 + mtd->writesize; + + /* Fill OOB data in */ +- if (!oob_required) +- memset(oob_buf, 0xff, 4); +- else +- memcpy(oob_buf, +- chip->oob_poi + layout->oobfree[i].offset, +- 4); +- +- +- memcpy_toio(nfc->regs + NFC_REG_USER_DATA_BASE, oob_buf, 4); ++ if (!oob_required) { ++ user_data = 0xffffffff; ++ } else { ++ memcpy(&user_data, ++ chip->oob_poi + layout->oobfree[i].offset, 4); ++ user_data = le32_to_cpu(user_data); ++ } + + if (i) { + cnt = ecc->bytes + 4; +@@ -946,12 +944,16 @@ static int sunxi_nfc_hw_ecc_write_page(s + if (rndactiv) { + /* pre randomize to generate FF patterns on the NAND */ + if (!i) { ++ u8 oob_tmp[2]; + u16 state = rnd->subseeds[rnd->page % rnd->nseeds]; ++ oob_tmp[0] = user_data; ++ oob_tmp[1] = user_data >> 8; + state = sunxi_nfc_hwrnd_single_step(state, 15); +- oob_buf[0] ^= state; ++ oob_tmp[0] ^= state; + state = sunxi_nfc_hwrnd_step(rnd, state, 1); +- oob_buf[1] ^= state; +- memcpy_toio(nfc->regs + NFC_REG_USER_DATA_BASE, oob_buf, 4); ++ oob_tmp[1] ^= state; ++ user_data &= ~0xffff; ++ user_data |= oob_tmp[0] | (oob_tmp[1] << 8); + } + tmp = readl(nfc->regs + NFC_REG_ECC_CTL); + tmp &= ~(NFC_RANDOM_DIRECTION | NFC_ECC_EXCEPTION); +@@ -959,6 +961,8 @@ static int sunxi_nfc_hw_ecc_write_page(s + writel(tmp, nfc->regs + NFC_REG_ECC_CTL); + } + ++ writel(user_data, nfc->regs + NFC_REG_USER_DATA_BASE); ++ + chip->cmdfunc(mtd, NAND_CMD_RNDIN, offset, -1); + + ret = sunxi_nfc_wait_cmd_fifo_empty(nfc); |