From nobody Sun Feb 8 20:17:40 2026 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 1C8494F61D; Wed, 27 Mar 2024 10:44:51 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1711536292; cv=none; b=KtwJZpP+x6Q22bWaffOrPsmLO1M+CEvoPkPnW8ck7vtI7UFfkVNTGrZp9Yn9OimdjOi91sONiQKijp+hPW8CWYxciFfyDrgk4EGvEauMMGvoR4nj0u139e1FhDfC3WNmrteRKKZ5UYiZlbZdsYee7M3EQAduhdaYjyaAZ+pR6cc= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1711536292; c=relaxed/simple; bh=SOFXEAyxqf7gCj/PKs4OxopkGggYXvVGBYupyrDF7MQ=; h=From:Date:Subject:MIME-Version:Content-Type:Message-Id:References: In-Reply-To:To:Cc; b=rVm7/uSFXgN9iqqOEaBgisIU6lTG0loV+H3/mQJ1kzeNeQ7Ipy5g7Pcsu3aIJWXZ2B8E/j4+cJVv9vvJKSdlIteamUE+h9WE6m+GFvFXlrpPeHCoPdVsBcpqwFnb6l8Jj1+GKvVhT56sos6YnQNHNn9txkWzTzqMQhxhPBH5MjM= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=imzIbDF4; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="imzIbDF4" Received: by smtp.kernel.org (Postfix) with ESMTPS id AE830C433F1; Wed, 27 Mar 2024 10:44:51 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1711536291; bh=SOFXEAyxqf7gCj/PKs4OxopkGggYXvVGBYupyrDF7MQ=; h=From:Date:Subject:References:In-Reply-To:To:Cc:Reply-To:From; b=imzIbDF4cBc002W+hFN9aAH7GeCSjth9qKsiEuK5Dqag4nAYohKJIiGJ7rblNnpFe V3YKMqPw6LVobmuzLD/Ac9etyrRl/xE9RsU/RL4DyLA3uVmkGbwK7RPL4PGQHkLGDq YYDDrVlmibNp45zKxeAEUnTGsLce5EBfl9G/TYVjAVBSUh2AqOuElOCJuxaP4f+weU CP7EI0IBgE1vmDZq+j5kk/uuy0/VIwdi2xqgfqHIzrsHl+ul5PhbxejRWFMvF9EKT2 i4B2LoR1nemzqlTRup48aqzPabdNTY1piBpNhafYUe5YT7LNtnJrVhB7PpINLRWsnp YCCug7gpdofqA== Received: from aws-us-west-2-korg-lkml-1.web.codeaurora.org (localhost.localdomain [127.0.0.1]) by smtp.lore.kernel.org (Postfix) with ESMTP id 9B9CBC54E67; Wed, 27 Mar 2024 10:44:51 +0000 (UTC) From: Keguang Zhang via B4 Relay Date: Wed, 27 Mar 2024 18:43:59 +0800 Subject: [PATCH v6 1/3] dt-bindings: mtd: Add Loongson-1 NAND Controller Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable Message-Id: <20240327-loongson1-nand-v6-1-7f9311cef020@gmail.com> References: <20240327-loongson1-nand-v6-0-7f9311cef020@gmail.com> In-Reply-To: <20240327-loongson1-nand-v6-0-7f9311cef020@gmail.com> To: Miquel Raynal , Richard Weinberger , Vignesh Raghavendra , Rob Herring , Krzysztof Kozlowski , Conor Dooley Cc: linux-mtd@lists.infradead.org, linux-kernel@vger.kernel.org, linux-mips@vger.kernel.org, devicetree@vger.kernel.org, Keguang Zhang X-Mailer: b4 0.12.3 X-Developer-Signature: v=1; a=ed25519-sha256; t=1711536289; l=1918; i=keguang.zhang@gmail.com; s=20231129; h=from:subject:message-id; bh=/c2JzCGiocJH2FRjGpQj1Q5eYCDgSYWhUtAJhnm0nNk=; b=eaerRshqwfTKjm0fCEbsHmg1vT1vqL96vqKGFwahc8rg9aGw2YxI9AeHm3KR85x7LcCIlYf+Z ZsmgEurqShEBYEkbliGi10MUSklMLGGV/zF/PLi8k/BFjxQ/XpEy4XV X-Developer-Key: i=keguang.zhang@gmail.com; a=ed25519; pk=FMKGj/JgKll/MgClpNZ3frIIogsh5e5r8CeW2mr+WLs= X-Endpoint-Received: by B4 Relay for keguang.zhang@gmail.com/20231129 with auth_id=102 X-Original-From: Keguang Zhang Reply-To: keguang.zhang@gmail.com From: Keguang Zhang Add devicetree binding document for Loongson-1 NAND Controller. Signed-off-by: Keguang Zhang --- Changes in v6: - A newly added patch --- .../devicetree/bindings/mtd/loongson,ls1x-nfc.yaml | 66 ++++++++++++++++++= ++++ 1 file changed, 66 insertions(+) diff --git a/Documentation/devicetree/bindings/mtd/loongson,ls1x-nfc.yaml b= /Documentation/devicetree/bindings/mtd/loongson,ls1x-nfc.yaml new file mode 100644 index 000000000000..2494c7b3b506 --- /dev/null +++ b/Documentation/devicetree/bindings/mtd/loongson,ls1x-nfc.yaml @@ -0,0 +1,66 @@ +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/mtd/loongson,ls1x-nfc.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: Loongson-1 NAND Controller + +maintainers: + - Keguang Zhang + +allOf: + - $ref: nand-controller.yaml + +properties: + compatible: + oneOf: + - const: loongson,ls1b-nfc + - items: + - enum: + - loongson,ls1a-nfc + - loongson,ls1c-nfc + - const: loongson,ls1b-nfc + + reg: + maxItems: 1 + + dmas: + maxItems: 1 + + dma-names: + const: rxtx + +patternProperties: + "^nand@[0-3]$": + type: object + $ref: raw-nand-chip.yaml + + unevaluatedProperties: false + +required: + - compatible + - reg + - dmas + - dma-names + +unevaluatedProperties: false + +examples: + - | + nand-controller@1fe78000 { + compatible =3D "loongson,ls1b-nfc"; + reg =3D <0x1fe78000 0x40>; + + #address-cells =3D <1>; + #size-cells =3D <0>; + + dmas =3D <&dma 0>; + dma-names =3D "rxtx"; + + nand@0 { + reg =3D <0>; + nand-use-soft-ecc-engine; + nand-ecc-algo =3D "hamming"; + }; + }; --=20 2.40.1 From nobody Sun Feb 8 20:17:40 2026 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 1C88A524CE; Wed, 27 Mar 2024 10:44:51 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1711536292; cv=none; b=LmkqdmCkk6j/NGIJCXsz7DA9jd0ex+m9rS6uLVQD0cFjEszApEna8TgFVOpBQs8vLsmvMxmh4hBvnvtE9C1K39C6fWtOHmJ5X/QPcUe9W8fz78My8x6wGUmeIdLl0ranepkUeynaehyZ2fif5YDN8d6hBknbQUqVn9+1Z7KvLFg= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; 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Wed, 27 Mar 2024 10:44:51 +0000 (UTC) From: Keguang Zhang via B4 Relay Date: Wed, 27 Mar 2024 18:44:00 +0800 Subject: [PATCH v6 2/3] mtd: rawnand: Enable monolithic read when reading subpages Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable Message-Id: <20240327-loongson1-nand-v6-2-7f9311cef020@gmail.com> References: <20240327-loongson1-nand-v6-0-7f9311cef020@gmail.com> In-Reply-To: <20240327-loongson1-nand-v6-0-7f9311cef020@gmail.com> To: Miquel Raynal , Richard Weinberger , Vignesh Raghavendra , Rob Herring , Krzysztof Kozlowski , Conor Dooley Cc: linux-mtd@lists.infradead.org, linux-kernel@vger.kernel.org, linux-mips@vger.kernel.org, devicetree@vger.kernel.org, Keguang Zhang X-Mailer: b4 0.12.3 X-Developer-Signature: v=1; a=ed25519-sha256; t=1711536289; l=2162; i=keguang.zhang@gmail.com; s=20231129; h=from:subject:message-id; bh=lS2LSZ/s5Z4DeAh+vHqnlTAlI1Wu1nzKK/BPFHeBtfc=; b=jswAkTrM2ib8XVP9hzAqLEdJrjizPymy8TfvB7eIXISh60W8V0vf2sTb+pWo5AXZDxYFqVxq0 TOgwt6PbWkYD9qEkmXxlJXaJWaV/TZCv+eBZKcqpxkLIwTTX4oWrFmH X-Developer-Key: i=keguang.zhang@gmail.com; a=ed25519; pk=FMKGj/JgKll/MgClpNZ3frIIogsh5e5r8CeW2mr+WLs= X-Endpoint-Received: by B4 Relay for keguang.zhang@gmail.com/20231129 with auth_id=102 X-Original-From: Keguang Zhang Reply-To: keguang.zhang@gmail.com From: Keguang Zhang nand_read_subpage() reads data and ECC data by two separate operations. This patch allows the NAND controllers who support monolithic page read to do subpage read by a single operation, which is more effective than nand_read_subpage(). --- Changes in v6: - A newly added patch Signed-off-by: Keguang Zhang --- drivers/mtd/nand/raw/nand_base.c | 5 +++-- include/linux/mtd/rawnand.h | 5 +++++ 2 files changed, 8 insertions(+), 2 deletions(-) diff --git a/drivers/mtd/nand/raw/nand_base.c b/drivers/mtd/nand/raw/nand_b= ase.c index d7dbbd469b89..eeb654c6b4fc 100644 --- a/drivers/mtd/nand/raw/nand_base.c +++ b/drivers/mtd/nand/raw/nand_base.c @@ -3630,7 +3630,7 @@ static int nand_do_read_ops(struct nand_chip *chip, l= off_t from, oob_required, page); else if (!aligned && NAND_HAS_SUBPAGE_READ(chip) && - !oob) + !NAND_HAS_MONOLITHIC_READ(chip) && !oob) ret =3D chip->ecc.read_subpage(chip, col, bytes, bufpoi, page); else @@ -3648,7 +3648,8 @@ static int nand_do_read_ops(struct nand_chip *chip, l= off_t from, * partial pages or when a bounce buffer is required. */ if (use_bounce_buf) { - if (!NAND_HAS_SUBPAGE_READ(chip) && !oob && + if ((!NAND_HAS_SUBPAGE_READ(chip) || + NAND_HAS_MONOLITHIC_READ(chip)) && !oob && !(mtd->ecc_stats.failed - ecc_stats.failed) && (ops->mode !=3D MTD_OPS_RAW)) { chip->pagecache.page =3D realpage; diff --git a/include/linux/mtd/rawnand.h b/include/linux/mtd/rawnand.h index e84522e31301..92d3ab491c9c 100644 --- a/include/linux/mtd/rawnand.h +++ b/include/linux/mtd/rawnand.h @@ -150,6 +150,11 @@ struct gpio_desc; /* Device needs 3rd row address cycle */ #define NAND_ROW_ADDR_3 BIT(14) =20 +/* Device supports monolithic reads */ +#define NAND_MONOLITHIC_READ BIT(15) +/* Macros to identify the above */ +#define NAND_HAS_MONOLITHIC_READ(chip) ((chip->options & NAND_MONOLITHIC_R= EAD)) + /* Non chip related options */ /* This option skips the bbt scan during initialization. */ #define NAND_SKIP_BBTSCAN BIT(16) --=20 2.40.1 From nobody Sun Feb 8 20:17:40 2026 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 405A9524D2; Wed, 27 Mar 2024 10:44:52 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; 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charset="utf-8" Content-Transfer-Encoding: quoted-printable Message-Id: <20240327-loongson1-nand-v6-3-7f9311cef020@gmail.com> References: <20240327-loongson1-nand-v6-0-7f9311cef020@gmail.com> In-Reply-To: <20240327-loongson1-nand-v6-0-7f9311cef020@gmail.com> To: Miquel Raynal , Richard Weinberger , Vignesh Raghavendra , Rob Herring , Krzysztof Kozlowski , Conor Dooley Cc: linux-mtd@lists.infradead.org, linux-kernel@vger.kernel.org, linux-mips@vger.kernel.org, devicetree@vger.kernel.org, Keguang Zhang X-Mailer: b4 0.12.3 X-Developer-Signature: v=1; a=ed25519-sha256; t=1711536289; l=23438; i=keguang.zhang@gmail.com; s=20231129; h=from:subject:message-id; bh=ugcQN23/OpXrK+k5TnuLevlq8vkiY3YbSUeH7cZGYqM=; b=fgZCavgRzwjG7p+A4WKjS51jVlbGlSnAJcN5M8+2t21tBoyuMTAhPljAYcnJdq/aqrFy3Kdj3 ogMJEhS7kKID8Wp5t7Jt1ZnxmKNHbywHKNVXGo+RMWVomBb2EAUOPbq X-Developer-Key: i=keguang.zhang@gmail.com; a=ed25519; pk=FMKGj/JgKll/MgClpNZ3frIIogsh5e5r8CeW2mr+WLs= X-Endpoint-Received: by B4 Relay for keguang.zhang@gmail.com/20231129 with auth_id=102 X-Original-From: Keguang Zhang Reply-To: keguang.zhang@gmail.com From: Keguang Zhang This patch adds NAND Controller driver for Loongson-1 SoCs. Signed-off-by: Keguang Zhang --- Changes in v6: - Amend Kconfig - Add DT support - Use DT data instead of platform data - Remove MAX_ID_SIZE - Remove case NAND_OP_CMD_INSTR in ls1x_nand_set_controller() - Move ECC configuration to ls1x_nand_attach_chip() - Rename variable "nand" to "ls1x" - Rename variable "nc" to "nfc" - Some minor fixes - Link to v5: https://lore.kernel.org/all/20210520224213.7907-1-keguang.zha= ng@gmail.com Changes in v5: - Update the driver to fit the raw NAND framework. - Implement exec_op() instead of legacy cmdfunc(). - Use dma_request_chan() instead of dma_request_channel(). - Some minor fixes and cleanups. Changes in v4: - Retrieve the controller from nand_hw_control. Changes in v3: - Replace __raw_readl/__raw_writel with readl/writel. - Split ls1x_nand into two structures: ls1x_nand_chip and ls1x_nand_controller. Changes in v2: - Modify the dependency in Kconfig due to the changes of DMA module. --- drivers/mtd/nand/raw/Kconfig | 7 + drivers/mtd/nand/raw/Makefile | 1 + drivers/mtd/nand/raw/loongson1_nand.c | 748 ++++++++++++++++++++++++++++++= ++++ 3 files changed, 756 insertions(+) diff --git a/drivers/mtd/nand/raw/Kconfig b/drivers/mtd/nand/raw/Kconfig index cbf8ae85e1ae..9e34ce05341b 100644 --- a/drivers/mtd/nand/raw/Kconfig +++ b/drivers/mtd/nand/raw/Kconfig @@ -449,6 +449,13 @@ config MTD_NAND_RENESAS Enables support for the NAND controller found on Renesas R-Car Gen3 and RZ/N1 SoC families. =20 +config MTD_NAND_LOONGSON1 + tristate "Loongson1 NAND controller" + depends on LOONGSON1_DMA || COMPILE_TEST + select REGMAP_MMIO + help + Enables support for NAND controller on Loongson1 SoCs. + comment "Misc" =20 config MTD_SM_COMMON diff --git a/drivers/mtd/nand/raw/Makefile b/drivers/mtd/nand/raw/Makefile index 25120a4afada..b3c65cab819c 100644 --- a/drivers/mtd/nand/raw/Makefile +++ b/drivers/mtd/nand/raw/Makefile @@ -57,6 +57,7 @@ obj-$(CONFIG_MTD_NAND_INTEL_LGM) +=3D intel-nand-controll= er.o obj-$(CONFIG_MTD_NAND_ROCKCHIP) +=3D rockchip-nand-controller.o obj-$(CONFIG_MTD_NAND_PL35X) +=3D pl35x-nand-controller.o obj-$(CONFIG_MTD_NAND_RENESAS) +=3D renesas-nand-controller.o +obj-$(CONFIG_MTD_NAND_LOONGSON1) +=3D loongson1_nand.o =20 nand-objs :=3D nand_base.o nand_legacy.o nand_bbt.o nand_timings.o nand_id= s.o nand-objs +=3D nand_onfi.o diff --git a/drivers/mtd/nand/raw/loongson1_nand.c b/drivers/mtd/nand/raw/l= oongson1_nand.c new file mode 100644 index 000000000000..d0f66a81ba0b --- /dev/null +++ b/drivers/mtd/nand/raw/loongson1_nand.c @@ -0,0 +1,748 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/* + * NAND Controller Driver for Loongson-1 SoC + * + * Copyright (C) 2015-2024 Keguang Zhang + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +/* Loongson-1 NAND Controller Registers */ +#define NAND_CMD 0x0 +#define NAND_ADDR1 0x4 +#define NAND_ADDR2 0x8 +#define NAND_TIMING 0xc +#define NAND_IDL 0x10 +#define NAND_IDH_STATUS 0x14 +#define NAND_PARAM 0x18 +#define NAND_OP_NUM 0x1c +#define MAX_DUMP_REGS 0x20 + +#define NAND_DMA_ADDR 0x40 + +/* NAND Command Register Bits */ +#define OP_DONE BIT(10) +#define OP_SPARE BIT(9) +#define OP_MAIN BIT(8) +#define CMD_STATUS BIT(7) +#define CMD_RESET BIT(6) +#define CMD_READID BIT(5) +#define BLOCKS_ERASE BIT(4) +#define CMD_ERASE BIT(3) +#define CMD_WRITE BIT(2) +#define CMD_READ BIT(1) +#define CMD_VALID BIT(0) + +#define MAX_ADDR_CYC 5U + +#define WAIT_CYCLE_MASK GENMASK(7, 0) +#define HOLD_CYCLE_MASK GENMASK(15, 8) +#define CELL_SIZE_MASK GENMASK(11, 8) + +#define BITS_PER_WORD (4 * BITS_PER_BYTE) + +/* macros for registers read/write */ +#define nand_readl(nfc, off) \ + readl((nfc)->reg_base + (off)) + +#define nand_writel(nfc, off, val) \ + writel((val), (nfc)->reg_base + (off)) + +struct ls1x_nfc_data { + unsigned int status_field; + unsigned int op_scope_field; + unsigned int hold_cycle; + unsigned int wait_cycle; + void (*parse_address)(struct nand_chip *chip, const u8 *addrs, + unsigned int naddrs, int cmd); +}; + +struct ls1x_nfc { + void __iomem *reg_base; + struct regmap *regmap; + const struct ls1x_nfc_data *data; + __le32 addr1_reg; + __le32 addr2_reg; + + char *buf; + unsigned int len; + unsigned int rdy_timeout; + + /* DMA Engine stuff */ + struct dma_chan *dma_chan; + dma_cookie_t dma_cookie; + struct completion dma_complete; +}; + +struct ls1x_nand { + struct device *dev; + struct nand_chip chip; + struct nand_controller controller; + struct ls1x_nfc nfc; +}; + +static const struct regmap_config ls1x_nand_regmap_config =3D { + .reg_bits =3D 32, + .val_bits =3D 32, + .reg_stride =3D 4, +}; + +static inline void ls1b_nand_parse_address(struct nand_chip *chip, + const u8 *addrs, + unsigned int naddrs, int cmd) +{ + struct ls1x_nand *ls1x =3D nand_get_controller_data(chip); + struct ls1x_nfc *nfc =3D &ls1x->nfc; + unsigned int page_shift =3D chip->page_shift + 1; + int i; + + nfc->addr1_reg =3D 0; + nfc->addr2_reg =3D 0; + + if (cmd =3D=3D CMD_ERASE) { + page_shift =3D chip->page_shift; + + for (i =3D 0; i < min(MAX_ADDR_CYC - 2, naddrs); i++) + nfc->addr1_reg |=3D + (u32)addrs[i] << (page_shift + BITS_PER_BYTE * i); + if (i =3D=3D MAX_ADDR_CYC - 2) + nfc->addr2_reg |=3D + (u32)addrs[i] >> (BITS_PER_WORD - page_shift - + BITS_PER_BYTE * (i - 1)); + + return; + } + + for (i =3D 0; i < min(2U, naddrs); i++) + nfc->addr1_reg |=3D (u32)addrs[i] << BITS_PER_BYTE * i; + for (i =3D 2; i < min(MAX_ADDR_CYC, naddrs); i++) + nfc->addr1_reg |=3D + (u32)addrs[i] << (page_shift + BITS_PER_BYTE * (i - 2)); + if (i =3D=3D MAX_ADDR_CYC) + nfc->addr2_reg |=3D + (u32)addrs[i] >> (BITS_PER_WORD - page_shift - + BITS_PER_BYTE * (i - 1)); +} + +static inline void ls1c_nand_parse_address(struct nand_chip *chip, + const u8 *addrs, + unsigned int naddrs, int cmd) +{ + struct ls1x_nand *ls1x =3D nand_get_controller_data(chip); + struct ls1x_nfc *nfc =3D &ls1x->nfc; + int i; + + nfc->addr1_reg =3D 0; + nfc->addr2_reg =3D 0; + + if (cmd =3D=3D CMD_ERASE) { + for (i =3D 0; i < min(MAX_ADDR_CYC, naddrs); i++) + nfc->addr2_reg |=3D (u32)addrs[i] << BITS_PER_BYTE * i; + + return; + } + + for (i =3D 0; i < min(MAX_ADDR_CYC, naddrs); i++) { + if (i < 2) + nfc->addr1_reg |=3D (u32)addrs[i] << BITS_PER_BYTE * i; + else + nfc->addr2_reg |=3D + (u32)addrs[i] << BITS_PER_BYTE * (i - 2); + } +} + +static int ls1x_nand_set_controller(struct nand_chip *chip, + const struct nand_subop *subop, int cmd) +{ + struct ls1x_nand *ls1x =3D nand_get_controller_data(chip); + struct ls1x_nfc *nfc =3D &ls1x->nfc; + unsigned int op_id; + + nfc->buf =3D NULL; + nfc->len =3D 0; + nfc->rdy_timeout =3D 0; + + for (op_id =3D 0; op_id < subop->ninstrs; op_id++) { + const struct nand_op_instr *instr =3D &subop->instrs[op_id]; + unsigned int offset, naddrs; + const u8 *addrs; + + switch (instr->type) { + case NAND_OP_ADDR_INSTR: + offset =3D nand_subop_get_addr_start_off(subop, op_id); + naddrs =3D nand_subop_get_num_addr_cyc(subop, op_id); + addrs =3D &instr->ctx.addr.addrs[offset]; + + nfc->data->parse_address(chip, addrs, naddrs, cmd); + /* set NAND address */ + nand_writel(nfc, NAND_ADDR1, nfc->addr1_reg); + nand_writel(nfc, NAND_ADDR2, nfc->addr2_reg); + break; + case NAND_OP_DATA_IN_INSTR: + case NAND_OP_DATA_OUT_INSTR: + offset =3D nand_subop_get_data_start_off(subop, op_id); + nfc->len =3D nand_subop_get_data_len(subop, op_id); + if (instr->type =3D=3D NAND_OP_DATA_IN_INSTR) + nfc->buf =3D + (void *)instr->ctx.data.buf.in + offset; + else if (instr->type =3D=3D NAND_OP_DATA_OUT_INSTR) + nfc->buf =3D + (void *)instr->ctx.data.buf.out + offset; + + if (cmd & (CMD_READID | CMD_STATUS)) + break; + + if (!IS_ALIGNED((u32)nfc->buf, chip->buf_align)) { + dev_err(ls1x->dev, + "nfc->buf %px is not aligned!\n", + nfc->buf); + return -EOPNOTSUPP; + } else if (!IS_ALIGNED(nfc->len, chip->buf_align)) { + dev_err(ls1x->dev, + "nfc->len %u is not aligned!\n", + nfc->len); + return -EOPNOTSUPP; + } + + /* set NAND data length */ + nand_writel(nfc, NAND_OP_NUM, nfc->len); + + if (nfc->data->op_scope_field) { + int op_scope =3D nfc->len << ffs(nfc->data->op_scope_field); + + regmap_update_bits(nfc->regmap, NAND_PARAM, + nfc->data->op_scope_field, + op_scope); + } + + break; + case NAND_OP_WAITRDY_INSTR: + nfc->rdy_timeout =3D instr->ctx.waitrdy.timeout_ms; + break; + default: + break; + } + } + + /* set NAND erase block count */ + if (cmd & CMD_ERASE) + nand_writel(nfc, NAND_OP_NUM, 1); + /* set NAND operation region */ + if (nfc->buf && nfc->len) + cmd |=3D OP_SPARE | OP_MAIN; + + /* set NAND command */ + nand_writel(nfc, NAND_CMD, cmd); + /* Trigger operation */ + regmap_write_bits(nfc->regmap, NAND_CMD, CMD_VALID, CMD_VALID); + + return 0; +} + +static void ls1x_nand_dma_callback(void *data) +{ + struct ls1x_nand *ls1x =3D (struct ls1x_nand *)data; + struct ls1x_nfc *nfc =3D &ls1x->nfc; + enum dma_status status; + + status =3D dmaengine_tx_status(nfc->dma_chan, nfc->dma_cookie, NULL); + if (likely(status =3D=3D DMA_COMPLETE)) + dev_dbg(ls1x->dev, "DMA complete with cookie=3D%d\n", + nfc->dma_cookie); + else + dev_err(ls1x->dev, "DMA error with cookie=3D%d\n", + nfc->dma_cookie); + + complete(&nfc->dma_complete); +} + +static int ls1x_nand_dma_transfer(struct ls1x_nand *ls1x, bool is_write) +{ + struct ls1x_nfc *nfc =3D &ls1x->nfc; + struct dma_chan *chan =3D nfc->dma_chan; + struct dma_async_tx_descriptor *desc; + enum dma_data_direction data_dir =3D + is_write ? DMA_TO_DEVICE : DMA_FROM_DEVICE; + enum dma_transfer_direction xfer_dir =3D + is_write ? DMA_MEM_TO_DEV : DMA_DEV_TO_MEM; + dma_addr_t dma_addr; + int ret; + + dma_addr =3D dma_map_single(chan->device->dev, nfc->buf, nfc->len, + data_dir); + if (dma_mapping_error(chan->device->dev, dma_addr)) { + dev_err(ls1x->dev, "failed to map DMA buffer!\n"); + return -ENXIO; + } + + desc =3D dmaengine_prep_slave_single(chan, dma_addr, nfc->len, xfer_dir, + DMA_PREP_INTERRUPT); + if (!desc) { + dev_err(ls1x->dev, "failed to prepare DMA descriptor!\n"); + ret =3D PTR_ERR(desc); + goto err; + } + desc->callback =3D ls1x_nand_dma_callback; + desc->callback_param =3D ls1x; + + nfc->dma_cookie =3D dmaengine_submit(desc); + ret =3D dma_submit_error(nfc->dma_cookie); + if (ret) { + dev_err(ls1x->dev, "failed to submit DMA descriptor!\n"); + goto err; + } + + dev_dbg(ls1x->dev, "issue DMA with cookie=3D%d\n", nfc->dma_cookie); + dma_async_issue_pending(chan); + + ret =3D wait_for_completion_timeout(&nfc->dma_complete, + msecs_to_jiffies(nfc->rdy_timeout)); + if (ret <=3D 0) { + dev_err(ls1x->dev, "DMA timeout!%u\n", nfc->rdy_timeout); + dmaengine_terminate_all(chan); + ret =3D -EIO; + } + ret =3D 0; +err: + dma_unmap_single(chan->device->dev, dma_addr, nfc->len, data_dir); + + return ret; +} + +static inline int ls1x_nand_wait_for_op_done(struct ls1x_nfc *nfc) +{ + unsigned int val; + int ret =3D 0; + + /* Wait for operation done */ + if (nfc->rdy_timeout) + ret =3D regmap_read_poll_timeout(nfc->regmap, NAND_CMD, val, + val & OP_DONE, 0, + nfc->rdy_timeout * 1000); + + return ret; +} + +static int ls1x_nand_reset_exec(struct nand_chip *chip, + const struct nand_subop *subop) +{ + struct ls1x_nand *ls1x =3D nand_get_controller_data(chip); + struct ls1x_nfc *nfc =3D &ls1x->nfc; + int ret; + + ls1x_nand_set_controller(chip, subop, CMD_RESET); + + ret =3D ls1x_nand_wait_for_op_done(nfc); + if (ret) + dev_err(ls1x->dev, "CMD_RESET failed! %d\n", ret); + + return ret; +} + +static int ls1x_nand_read_id_exec(struct nand_chip *chip, + const struct nand_subop *subop) +{ + struct ls1x_nand *ls1x =3D nand_get_controller_data(chip); + struct ls1x_nfc *nfc =3D &ls1x->nfc; + long long idl =3D 0; + int i, ret; + + ls1x_nand_set_controller(chip, subop, CMD_READID); + + ret =3D ls1x_nand_wait_for_op_done(nfc); + if (ret) { + dev_err(ls1x->dev, "CMD_READID failed! %d\n", ret); + print_hex_dump_debug("REG: ", DUMP_PREFIX_OFFSET, 16, 4, + nfc->reg_base, MAX_DUMP_REGS, false); + return ret; + } + + idl =3D __be32_to_cpu(nand_readl(nfc, NAND_IDL)); + memset(nfc->buf, 0x0, nfc->len); + + for (i =3D 0; i < nfc->len; i++) { + if (i > 0) + nfc->buf[i] =3D (char)(idl >> (i - 1) * BITS_PER_BYTE); + else + nfc->buf[i] =3D (char)nand_readl(nfc, NAND_IDH_STATUS); + } + + return ret; +} + +static int ls1x_nand_erase_exec(struct nand_chip *chip, + const struct nand_subop *subop) +{ + struct ls1x_nand *ls1x =3D nand_get_controller_data(chip); + struct ls1x_nfc *nfc =3D &ls1x->nfc; + int ret; + + ls1x_nand_set_controller(chip, subop, CMD_ERASE); + + ret =3D ls1x_nand_wait_for_op_done(nfc); + if (ret) { + dev_err(ls1x->dev, "CMD_ERASE failed! %d\n", ret); + print_hex_dump_debug("REG: ", DUMP_PREFIX_OFFSET, 16, 4, + nfc->reg_base, MAX_DUMP_REGS, false); + } + + return ret; +} + +static int ls1x_nand_read_exec(struct nand_chip *chip, + const struct nand_subop *subop) +{ + struct ls1x_nand *ls1x =3D nand_get_controller_data(chip); + struct ls1x_nfc *nfc =3D &ls1x->nfc; + bool is_write =3D false; + int ret; + + ls1x_nand_set_controller(chip, subop, CMD_READ); + + ret =3D ls1x_nand_dma_transfer(ls1x, is_write); + if (ret) + return ret; + + ret =3D ls1x_nand_wait_for_op_done(nfc); + if (ret) { + dev_err(ls1x->dev, "CMD_READ failed! %d\n", ret); + print_hex_dump_debug("REG: ", DUMP_PREFIX_OFFSET, 16, 4, + nfc->reg_base, MAX_DUMP_REGS, false); + } + + return ret; +} + +static int ls1x_nand_write_exec(struct nand_chip *chip, + const struct nand_subop *subop) +{ + struct ls1x_nand *ls1x =3D nand_get_controller_data(chip); + struct ls1x_nfc *nfc =3D &ls1x->nfc; + bool is_write =3D true; + int ret; + + ls1x_nand_set_controller(chip, subop, CMD_WRITE); + + ret =3D ls1x_nand_dma_transfer(ls1x, is_write); + if (ret) + return ret; + + ret =3D ls1x_nand_wait_for_op_done(nfc); + if (ret) { + dev_err(ls1x->dev, "CMD_WRITE failed! %d\n", ret); + print_hex_dump_debug("REG: ", DUMP_PREFIX_OFFSET, 16, 4, + nfc->reg_base, MAX_DUMP_REGS, false); + } + + return ret; +} + +static int ls1x_nand_read_status_exec(struct nand_chip *chip, + const struct nand_subop *subop) +{ + struct ls1x_nand *ls1x =3D nand_get_controller_data(chip); + struct ls1x_nfc *nfc =3D &ls1x->nfc; + int val, ret; + + ls1x_nand_set_controller(chip, subop, CMD_STATUS); + + ret =3D ls1x_nand_wait_for_op_done(nfc); + if (ret) { + dev_err(ls1x->dev, "CMD_STATUS failed! %d\n", ret); + return ret; + } + + val =3D nand_readl(nfc, NAND_IDH_STATUS) & ~nfc->data->status_field; + nfc->buf[0] =3D val << ffs(nfc->data->status_field); + + return ret; +} + +static const struct nand_op_parser ls1x_nand_op_parser =3D NAND_OP_PARSER( + NAND_OP_PARSER_PATTERN( + ls1x_nand_reset_exec, + NAND_OP_PARSER_PAT_CMD_ELEM(false), + NAND_OP_PARSER_PAT_WAITRDY_ELEM(false)), + NAND_OP_PARSER_PATTERN( + ls1x_nand_read_id_exec, + NAND_OP_PARSER_PAT_CMD_ELEM(false), + NAND_OP_PARSER_PAT_ADDR_ELEM(false, MAX_ADDR_CYC), + NAND_OP_PARSER_PAT_DATA_IN_ELEM(false, 8)), + NAND_OP_PARSER_PATTERN( + ls1x_nand_erase_exec, + NAND_OP_PARSER_PAT_CMD_ELEM(false), + NAND_OP_PARSER_PAT_ADDR_ELEM(false, MAX_ADDR_CYC), + NAND_OP_PARSER_PAT_CMD_ELEM(false), + NAND_OP_PARSER_PAT_WAITRDY_ELEM(false)), + NAND_OP_PARSER_PATTERN( + ls1x_nand_read_exec, + NAND_OP_PARSER_PAT_CMD_ELEM(false), + NAND_OP_PARSER_PAT_ADDR_ELEM(false, MAX_ADDR_CYC), + NAND_OP_PARSER_PAT_CMD_ELEM(false), + NAND_OP_PARSER_PAT_WAITRDY_ELEM(true), + NAND_OP_PARSER_PAT_DATA_IN_ELEM(false, 0)), + NAND_OP_PARSER_PATTERN( + ls1x_nand_write_exec, + NAND_OP_PARSER_PAT_CMD_ELEM(false), + NAND_OP_PARSER_PAT_ADDR_ELEM(false, MAX_ADDR_CYC), + NAND_OP_PARSER_PAT_DATA_OUT_ELEM(false, 0), + NAND_OP_PARSER_PAT_CMD_ELEM(false), + NAND_OP_PARSER_PAT_WAITRDY_ELEM(true)), + NAND_OP_PARSER_PATTERN( + ls1x_nand_read_status_exec, + NAND_OP_PARSER_PAT_CMD_ELEM(false), + NAND_OP_PARSER_PAT_DATA_IN_ELEM(false, 1)), + ); + +static int ls1x_nand_exec_op(struct nand_chip *chip, + const struct nand_operation *op, bool check_only) +{ + return nand_op_parser_exec_op(chip, &ls1x_nand_op_parser, op, + check_only); +} + +static int ls1x_nand_attach_chip(struct nand_chip *chip) +{ + struct ls1x_nand *ls1x =3D nand_get_controller_data(chip); + struct ls1x_nfc *nfc =3D &ls1x->nfc; + u64 chipsize =3D nanddev_target_size(&chip->base); + int cell_size =3D 0; + + switch (chipsize) { + case SZ_128M: + cell_size =3D 0x0; + break; + case SZ_256M: + cell_size =3D 0x1; + break; + case SZ_512M: + cell_size =3D 0x2; + break; + case SZ_1G: + cell_size =3D 0x3; + break; + case SZ_2G: + cell_size =3D 0x4; + break; + case SZ_4G: + cell_size =3D 0x5; + break; + case (SZ_2G * SZ_4G): /* 8G */ + cell_size =3D 0x6; + break; + case (SZ_4G * SZ_4G): /* 16G */ + cell_size =3D 0x7; + break; + default: + dev_err(ls1x->dev, "unsupported chip size: %llu MB\n", + chipsize); + break; + } + + /* Set cell size */ + regmap_update_bits(nfc->regmap, NAND_PARAM, CELL_SIZE_MASK, + FIELD_PREP(CELL_SIZE_MASK, cell_size)); + + regmap_update_bits(nfc->regmap, NAND_TIMING, HOLD_CYCLE_MASK, + FIELD_PREP(HOLD_CYCLE_MASK, nfc->data->hold_cycle)); + regmap_update_bits(nfc->regmap, NAND_TIMING, WAIT_CYCLE_MASK, + FIELD_PREP(WAIT_CYCLE_MASK, nfc->data->wait_cycle)); + + chip->ecc.read_page_raw =3D nand_monolithic_read_page_raw; + chip->ecc.write_page_raw =3D nand_monolithic_write_page_raw; + chip->options |=3D NAND_MONOLITHIC_READ; + + return 0; +} + +static const struct nand_controller_ops ls1x_nfc_ops =3D { + .exec_op =3D ls1x_nand_exec_op, + .attach_chip =3D ls1x_nand_attach_chip, +}; + +static void ls1x_nand_controller_cleanup(struct ls1x_nand *ls1x) +{ + if (ls1x->nfc.dma_chan) + dma_release_channel(ls1x->nfc.dma_chan); +} + +static int ls1x_nand_controller_init(struct ls1x_nand *ls1x, + struct platform_device *pdev) +{ + struct ls1x_nfc *nfc =3D &ls1x->nfc; + struct dma_slave_config cfg; + int ret; + + nfc->reg_base =3D devm_platform_ioremap_resource(pdev, 0); + if (IS_ERR(nfc->reg_base)) + return PTR_ERR(nfc->reg_base); + + nfc->regmap =3D devm_regmap_init_mmio(ls1x->dev, nfc->reg_base, + &ls1x_nand_regmap_config); + if (IS_ERR(nfc->regmap)) + return dev_err_probe(ls1x->dev, PTR_ERR(nfc->regmap), + "failed to init regmap\n"); + + nfc->dma_chan =3D dma_request_chan(ls1x->dev, "rxtx"); + if (IS_ERR(nfc->dma_chan)) + return dev_err_probe(ls1x->dev, PTR_ERR(nfc->dma_chan), + "failed to request DMA channel\n"); + dev_info(ls1x->dev, "got %s for %s access\n", + dma_chan_name(nfc->dma_chan), dev_name(ls1x->dev)); + + cfg.src_addr =3D CPHYSADDR(nfc->reg_base + NAND_DMA_ADDR); + cfg.src_addr_width =3D DMA_SLAVE_BUSWIDTH_4_BYTES; + cfg.dst_addr =3D CPHYSADDR(nfc->reg_base + NAND_DMA_ADDR); + cfg.dst_addr_width =3D DMA_SLAVE_BUSWIDTH_4_BYTES; + + ret =3D dmaengine_slave_config(nfc->dma_chan, &cfg); + if (ret) { + dev_err(ls1x->dev, "failed to config DMA channel\n"); + dma_release_channel(nfc->dma_chan); + return ret; + } + + init_completion(&nfc->dma_complete); + + return 0; +} + +static int ls1x_nand_chip_init(struct ls1x_nand *ls1x) +{ + int nchips =3D of_get_child_count(ls1x->dev->of_node); + struct device_node *chip_np; + struct nand_chip *chip =3D &ls1x->chip; + struct mtd_info *mtd =3D nand_to_mtd(chip); + int ret =3D 0; + + if (nchips !=3D 1) + return dev_err_probe(ls1x->dev, -EINVAL, + "Currently one NAND chip supported\n"); + + chip_np =3D of_get_next_child(ls1x->dev->of_node, NULL); + if (!chip_np) + return dev_err_probe(ls1x->dev, -ENODEV, + "failed to get child node for NAND chip\n"); + + chip->controller =3D &ls1x->controller; + chip->options =3D NAND_NO_SUBPAGE_WRITE | NAND_USES_DMA | NAND_BROKEN_XD; + chip->buf_align =3D 4; + nand_set_controller_data(chip, ls1x); + nand_set_flash_node(chip, chip_np); + + mtd->dev.parent =3D ls1x->dev; + mtd->name =3D "ls1x-nand"; + mtd->owner =3D THIS_MODULE; + + ret =3D nand_scan(chip, 1); + if (ret) { + of_node_put(chip_np); + return ret; + } + + ret =3D mtd_device_register(mtd, NULL, 0); + if (ret) { + dev_err(ls1x->dev, "failed to register MTD device! %d\n", ret); + nand_cleanup(chip); + of_node_put(chip_np); + } + + return ret; +} + +static int ls1x_nand_probe(struct platform_device *pdev) +{ + struct device *dev =3D &pdev->dev; + const struct ls1x_nfc_data *data; + struct ls1x_nand *ls1x; + int ret; + + data =3D of_device_get_match_data(&pdev->dev); + if (!data) + return -ENODEV; + + ls1x =3D devm_kzalloc(dev, sizeof(*ls1x), GFP_KERNEL); + if (!ls1x) + return -ENOMEM; + + ls1x->nfc.data =3D data; + ls1x->dev =3D dev; + ls1x->controller.ops =3D &ls1x_nfc_ops; + nand_controller_init(&ls1x->controller); + + ret =3D ls1x_nand_controller_init(ls1x, pdev); + if (ret) + return ret; + + ret =3D ls1x_nand_chip_init(ls1x); + if (ret) + goto err; + + platform_set_drvdata(pdev, ls1x); + + return 0; +err: + ls1x_nand_controller_cleanup(ls1x); + return ret; +} + +static int ls1x_nand_remove(struct platform_device *pdev) +{ + struct ls1x_nand *ls1x =3D platform_get_drvdata(pdev); + struct nand_chip *chip =3D &ls1x->chip; + int ret; + + ret =3D mtd_device_unregister(nand_to_mtd(chip)); + WARN_ON(ret); + nand_cleanup(chip); + ls1x_nand_controller_cleanup(ls1x); + + return 0; +} + +static const struct ls1x_nfc_data ls1b_nfc_data =3D { + .status_field =3D GENMASK(15, 8), + .hold_cycle =3D 0x2, + .wait_cycle =3D 0xc, + .parse_address =3D ls1b_nand_parse_address, +}; + +static const struct ls1x_nfc_data ls1c_nfc_data =3D { + .status_field =3D GENMASK(23, 16), + .op_scope_field =3D GENMASK(29, 16), + .hold_cycle =3D 0x2, + .wait_cycle =3D 0xc, + .parse_address =3D ls1c_nand_parse_address, +}; + +static const struct of_device_id ls1x_nfc_match[] =3D { + { .compatible =3D "loongson,ls1b-nfc", .data =3D &ls1b_nfc_data }, + { .compatible =3D "loongson,ls1c-nfc", .data =3D &ls1c_nfc_data }, + { /* sentinel */ } +}; +MODULE_DEVICE_TABLE(of, ls1x_nfc_match); + +static struct platform_driver ls1x_nand_driver =3D { + .probe =3D ls1x_nand_probe, + .remove =3D ls1x_nand_remove, + .driver =3D { + .name =3D KBUILD_MODNAME, + .of_match_table =3D ls1x_nfc_match, + }, +}; + +module_platform_driver(ls1x_nand_driver); + +MODULE_AUTHOR("Keguang Zhang "); +MODULE_DESCRIPTION("Loongson-1 NAND Controller driver"); +MODULE_LICENSE("GPL"); --=20 2.40.1