From patchwork Wed Sep 30 02:07:08 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Yifeng Zhao X-Patchwork-Id: 11807695 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 7DBA7139F for ; Wed, 30 Sep 2020 02:10:30 +0000 (UTC) Received: from merlin.infradead.org (merlin.infradead.org [205.233.59.134]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 2CDCE20773 for ; Wed, 30 Sep 2020 02:10:30 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=lists.infradead.org header.i=@lists.infradead.org header.b="Z+G7q5aF" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 2CDCE20773 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=rock-chips.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=merlin.20170209; h=Sender:Content-Transfer-Encoding: Content-Type:MIME-Version:Cc:List-Subscribe:List-Help:List-Post:List-Archive: List-Unsubscribe:List-Id:References:In-Reply-To:Message-Id:Date:Subject:To: From:Reply-To:Content-ID:Content-Description:Resent-Date:Resent-From: Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=JnVcYUnfVGw+iR1Ul9dpld7D68rOrtGbetBfGGYm+Gg=; b=Z+G7q5aFjk1skVQQsHjqpU4zS2 t8vtX5f8Fu6RQavNrCkQVinLI9bRljDJqTnQ/ypscAFeFPW3dzgww6BtKwUNaqm2GU0eDwYaKJLib QzSI9y8Iy3cOiyLkK3TVKNI0SBdiRHMZEztCJ/hB7jq7yLBBr+ZQTBbBffMXtP6RNbmy86+dG1uu/ OMwWR/Gt5D/xa/DmNwBV1rRBd6xHqLKDwb9I2QzEDseaeulkSMNJFHaebOySiwIKiDcReZZqB9Yad VG/JaaO8axP++hoWkEzK5G4Bi1/PbOnJYYUS6WhfMBDPcl7ZJ+PVtJLnQHxKs53m5+FONJUqr518M SjPZBCQg==; Received: from localhost ([::1] helo=merlin.infradead.org) by merlin.infradead.org with esmtp (Exim 4.92.3 #3 (Red Hat Linux)) id 1kNRXj-0003Kc-VQ; Wed, 30 Sep 2020 02:08:32 +0000 Received: from lucky1.263xmail.com ([211.157.147.130]) by merlin.infradead.org with esmtps (Exim 4.92.3 #3 (Red Hat Linux)) id 1kNRWn-000316-QG; Wed, 30 Sep 2020 02:07:40 +0000 Received: from localhost (unknown [192.168.167.32]) by lucky1.263xmail.com (Postfix) with ESMTP id 0B983CC41D; Wed, 30 Sep 2020 10:07:30 +0800 (CST) X-MAIL-GRAY: 0 X-MAIL-DELIVERY: 1 X-ADDR-CHECKED4: 1 X-ANTISPAM-LEVEL: 2 X-ABS-CHECKED: 0 Received: from localhost.localdomain (unknown [58.22.7.114]) by smtp.263.net (postfix) whith ESMTP id P19667T139951023531776S1601431634383390_; Wed, 30 Sep 2020 10:07:29 +0800 (CST) X-IP-DOMAINF: 1 X-UNIQUE-TAG: <6d0d0bd9658dad91170e1cbcd300d61d> X-RL-SENDER: yifeng.zhao@rock-chips.com X-SENDER: zyf@rock-chips.com X-LOGIN-NAME: yifeng.zhao@rock-chips.com X-FST-TO: miquel.raynal@bootlin.com X-SENDER-IP: 58.22.7.114 X-ATTACHMENT-NUM: 0 X-DNS-TYPE: 0 X-System-Flag: 0 From: Yifeng Zhao To: miquel.raynal@bootlin.com, richard@nod.at, vigneshr@ti.com, robh+dt@kernel.org Subject: [PATCH v10 2/8] mtd: rawnand: rockchip: NFC drivers for RK3308, RK2928 and others Date: Wed, 30 Sep 2020 10:07:08 +0800 Message-Id: <20200930020710.7394-3-yifeng.zhao@rock-chips.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20200930020710.7394-1-yifeng.zhao@rock-chips.com> References: <20200930020710.7394-1-yifeng.zhao@rock-chips.com> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20200929_220734_567800_1F046679 X-CRM114-Status: GOOD ( 30.67 ) X-Spam-Score: 0.9 (/) X-Spam-Report: SpamAssassin version 3.4.4 on merlin.infradead.org summary: Content analysis details: (0.9 points) pts rule name description ---- ---------------------- -------------------------------------------------- -0.0 RCVD_IN_DNSWL_NONE RBL: Sender listed at https://www.dnswl.org/, no trust [211.157.147.130 listed in list.dnswl.org] 1.5 RCVD_IN_SORBS_WEB RBL: SORBS: sender is an abusable web server [58.22.7.114 listed in dnsbl.sorbs.net] -0.6 RCVD_IN_MSPIKE_H2 RBL: Average reputation (+2) [211.157.147.130 listed in wl.mailspike.net] 0.0 T_SPF_PERMERROR SPF: test of record failed (permerror) 0.0 SPF_HELO_NONE SPF: HELO does not publish an SPF Record X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: devicetree@vger.kernel.org, heiko@sntech.de, Yifeng Zhao , linux-kernel@vger.kernel.org, linux-rockchip@lists.infradead.org, linux-mtd@lists.infradead.org, linux-arm-kernel@lists.infradead.org MIME-Version: 1.0 Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org This driver supports Rockchip NFC (NAND Flash Controller) found on RK3308, RK2928, RKPX30, RV1108 and other SOCs. The driver has been tested using 8-bit NAND interface on the ARM based RK3308 platform. Support Rockchip SoCs and NFC versions: - PX30 and RK3326(NFCv900). ECC: 16/40/60/70 bits/1KB. CLOCK: ahb and nfc. - RK3308 and RV1108(NFCv800). ECC: 16 bits/1KB. CLOCK: ahb and nfc. - RK3036 and RK3128(NFCv622). ECC: 16/24/40/60 bits/1KB. CLOCK: ahb and nfc. - RK3066, RK3188 and RK2928(NFCv600). ECC: 16/24/40/60 bits/1KB. CLOCK: ahb. Supported features: - Read full page data by DMA. - Support HW ECC(one step is 1KB). - Support 2 - 32K page size. - Support 8 CS(depend on SoCs) Limitations: - No support for the ecc step size is 512. - Untested on some SoCs. - No support for subpages. - No support for the builtin randomizer. - The original bad block mask is not supported. It is recommended to use the BBT(bad block table). Signed-off-by: Yifeng Zhao Reviewed-by: Kever Yang --- Changes in v10: - Fix compile error on master v5.9-rc7 Changes in v9: - The nfc->buffer will realloc while the page size of the second mtd is large than the first one - Fix coding style. - Remove struct rk_nfc_clk. - Prepend some function with rk_nfc_. - Replace function readl_poll_timeout_atomic with readl_relaxed_poll_timeout. - Remove function rk_nfc_read_byte and rk_nfc_write_byte. - Don't select the die if 'check_only == true' in function rk_nfc_exec_op. - Modify function rk_nfc_write_page and rk_nfc_write_page_raw. Changes in v8: None Changes in v7: - Rebase to linux-next. - Fix coding style. - Reserved 4 bytes at the beginning of the oob area. - Page raw read and write included ecc data. Changes in v6: - The mtd->name set by NAND label property. - Add some comments. - Fix compile error. Changes in v5: - Add boot blocks support with different ECC for bootROM. - Rename rockchip-nand.c to rockchip-nand-controller.c. - Unification of other variable names. - Remove some compatible define. Changes in v4: - Define platform data structure for the register offsets. - The compatible define with rkxx_nfc. - Use SET_SYSTEM_SLEEP_PM_OPS to define PM_OPS. - Use exec_op instead of legacy hooks. Changes in v3: None Changes in v2: - Fix compile error. - Include header files sorted by file name. drivers/mtd/nand/raw/Kconfig | 12 + drivers/mtd/nand/raw/Makefile | 1 + .../mtd/nand/raw/rockchip-nand-controller.c | 1455 +++++++++++++++++ 3 files changed, 1468 insertions(+) create mode 100644 drivers/mtd/nand/raw/rockchip-nand-controller.c diff --git a/drivers/mtd/nand/raw/Kconfig b/drivers/mtd/nand/raw/Kconfig index 1203775023ad..af0ed098ca0c 100644 --- a/drivers/mtd/nand/raw/Kconfig +++ b/drivers/mtd/nand/raw/Kconfig @@ -461,6 +461,18 @@ config MTD_NAND_ARASAN Enables the driver for the Arasan NAND flash controller on Zynq Ultrascale+ MPSoC. +config MTD_NAND_ROCKCHIP + tristate "Rockchip NAND controller" + depends on ARCH_ROCKCHIP && HAS_IOMEM + help + Enables support for NAND controller on Rockchip SoCs. + There are four different versions of NAND FLASH Controllers, + including: + NFC v600: RK2928, RK3066, RK3188 + NFC v622: RK3036, RK3128 + NFC v800: RK3308, RV1108 + NFC v900: PX30, RK3326 + comment "Misc" config MTD_SM_COMMON diff --git a/drivers/mtd/nand/raw/Makefile b/drivers/mtd/nand/raw/Makefile index 2930f5b9015d..960c9be25204 100644 --- a/drivers/mtd/nand/raw/Makefile +++ b/drivers/mtd/nand/raw/Makefile @@ -58,6 +58,7 @@ obj-$(CONFIG_MTD_NAND_STM32_FMC2) += stm32_fmc2_nand.o obj-$(CONFIG_MTD_NAND_MESON) += meson_nand.o obj-$(CONFIG_MTD_NAND_CADENCE) += cadence-nand-controller.o obj-$(CONFIG_MTD_NAND_ARASAN) += arasan-nand-controller.o +obj-$(CONFIG_MTD_NAND_ROCKCHIP) += rockchip-nand-controller.o nand-objs := nand_base.o nand_legacy.o nand_bbt.o nand_timings.o nand_ids.o nand-objs += nand_onfi.o diff --git a/drivers/mtd/nand/raw/rockchip-nand-controller.c b/drivers/mtd/nand/raw/rockchip-nand-controller.c new file mode 100644 index 000000000000..fc206d1126e4 --- /dev/null +++ b/drivers/mtd/nand/raw/rockchip-nand-controller.c @@ -0,0 +1,1455 @@ +// SPDX-License-Identifier: GPL-2.0 OR MIT +/* + * Rockchip NAND Flash controller driver. + * Copyright (C) 2020 Rockchip Inc. + * Author: Yifeng Zhao + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +/* + * NFC Page Data Layout: + * 1024 Bytes Data + 4Bytes sys data + 28Bytes~124Bytes ecc + + * 1024 Bytes Data + 4Bytes sys data + 28Bytes~124Bytes ecc + + * ...... + * NAND Page Data Layout: + * 1024 * n Data + m Bytes oob + * Original Bad Block Mask Location: + * First byte of oob(spare). + * nand_chip->oob_poi data layout: + * 4Bytes sys data + .... + 4Bytes sys data + ecc data. + */ + +/* NAND controller register definition */ +#define NFC_READ (0) +#define NFC_WRITE (1) + +#define NFC_FMCTL (0x00) +#define FMCTL_CE_SEL_M 0xFF +#define FMCTL_CE_SEL(x) (1 << (x)) +#define FMCTL_WP BIT(8) +#define FMCTL_RDY BIT(9) + +#define NFC_FMWAIT (0x04) +#define FLCTL_RST BIT(0) +#define FLCTL_WR (1) /* 0: read, 1: write */ +#define FLCTL_XFER_ST BIT(2) +#define FLCTL_XFER_EN BIT(3) +#define FLCTL_ACORRECT BIT(10) /* Auto correct error bits. */ +#define FLCTL_XFER_READY BIT(20) +#define FLCTL_XFER_SECTOR (22) +#define FLCTL_TOG_FIX BIT(29) + +#define BCHCTL_BANK_M (7 << 5) +#define BCHCTL_BANK (5) + +#define DMA_ST BIT(0) +#define DMA_WR (1) /* 0: write, 1: read */ +#define DMA_EN BIT(2) +#define DMA_AHB_SIZE (3) /* 0: 1, 1: 2, 2: 4 */ +#define DMA_BURST_SIZE (6) /* 0: 1, 3: 4, 5: 8, 7: 16 */ +#define DMA_INC_NUM (9) /* 1 - 16 */ + +#define ECC_ERR_CNT(x, e) ((((x) >> (e).low) & (e).low_mask) |\ + (((x) >> (e).high) & (e).high_mask) << (e).low_bn) +#define INT_DMA BIT(0) +#define NFC_BANK (0x800) +#define NFC_BANK_STEP (0x100) +#define BANK_DATA (0x00) +#define BANK_ADDR (0x04) +#define BANK_CMD (0x08) +#define NFC_SRAM0 (0x1000) +#define NFC_SRAM1 (0x1400) +#define NFC_SRAM_SIZE (0x400) +#define NFC_TIMEOUT (500000) +#define NFC_MAX_OOB_PER_STEP 128 +#define NFC_MIN_OOB_PER_STEP 64 +#define MAX_DATA_SIZE 0xFFFC +#define MAX_ADDRESS_CYC 6 +#define NFC_ECC_MAX_MODES 4 +#define NFC_MAX_NSELS (8) /* Some Socs only have 1 or 2 CSs. */ +#define NFC_SYS_DATA_SIZE (4) /* 4 bytes sys data in oob pre 1024 data.*/ +#define RK_DEFAULT_CLOCK_RATE (150 * 1000 * 1000) /* 150 Mhz */ +#define ACCTIMING(csrw, rwpw, rwcs) ((csrw) << 12 | (rwpw) << 5 | (rwcs)) + +enum nfc_type { + NFC_V6, + NFC_V8, + NFC_V9, +}; + +/** + * struct rk_ecc_cnt_status: represent a ecc status data. + * @err_flag_bit: error flag bit index at register. + * @low: ecc count low bit index at register. + * @low_mask: mask bit. + * @low_bn: ecc count low bit number. + * @high: ecc count high bit index at register. + * @high_mask: mask bit + */ +struct ecc_cnt_status { + u8 err_flag_bit; + u8 low; + u8 low_mask; + u8 low_bn; + u8 high; + u8 high_mask; +}; + +/* + * @type: nfc version + * @ecc_strengths: ecc strengths + * @ecc_cfgs: ecc config values + * @flctl_off: FLCTL register offset + * @bchctl_off: BCHCTL register offset + * @dma_data_buf_off: DMA_DATA_BUF register offset + * @dma_oob_buf_off: DMA_OOB_BUF register offset + * @dma_cfg_off: DMA_CFG register offset + * @dma_st_off: DMA_ST register offset + * @bch_st_off: BCG_ST register offset + * @randmz_off: RANDMZ register offset + * @int_en_off: interrupt enable register offset + * @int_clr_off: interrupt clean register offset + * @int_st_off: interrupt status register offset + * @oob0_off: oob0 register offset + * @oob1_off: oob1 register offset + * @ecc0: represent ECC0 status data + * @ecc1: represent ECC1 status data + */ +struct nfc_cfg { + enum nfc_type type; + u8 ecc_strengths[NFC_ECC_MAX_MODES]; + u32 ecc_cfgs[NFC_ECC_MAX_MODES]; + u32 flctl_off; + u32 bchctl_off; + u32 dma_cfg_off; + u32 dma_data_buf_off; + u32 dma_oob_buf_off; + u32 dma_st_off; + u32 bch_st_off; + u32 randmz_off; + u32 int_en_off; + u32 int_clr_off; + u32 int_st_off; + u32 oob0_off; + u32 oob1_off; + struct ecc_cnt_status ecc0; + struct ecc_cnt_status ecc1; +}; + +struct rk_nfc_nand_chip { + struct list_head node; + struct nand_chip chip; + + u16 spare_per_sector; + u16 oob_buf_per_sector; + u16 boot_blks; + u16 boot_ecc; + u16 metadata_size; + + u8 nsels; + u8 sels[0]; + /* Nothing after this field. */ +}; + +struct rk_nfc { + struct nand_controller controller; + const struct nfc_cfg *cfg; + struct device *dev; + + struct clk *nfc_clk; + struct clk *ahb_clk; + void __iomem *regs; + + u32 selected_bank; + u32 band_offset; + u32 cur_clk; + + struct completion done; + struct list_head chips; + + u8 *buffer; + u8 *page_buf; + u32 *oob_buf; + u32 buffer_size; + + unsigned long assigned_cs; +}; + +static inline struct rk_nfc_nand_chip *to_rknand(struct nand_chip *chip) +{ + return container_of(chip, struct rk_nfc_nand_chip, chip); +} + +static inline u8 *nand_data_ptr(struct nand_chip *chip, const u8 *p, int i) +{ + return (u8 *)p + i * chip->ecc.size; +} + +static inline u8 *nand_oob_ptr(struct nand_chip *chip, int i) +{ + u8 *poi; + + poi = chip->oob_poi + i * NFC_SYS_DATA_SIZE; + + return poi; +} + +static inline u8 *nand_oob_ecc_ptr(struct nand_chip *chip, int i) +{ + struct rk_nfc_nand_chip *rknand = to_rknand(chip); + u8 *poi; + + poi = chip->oob_poi + rknand->metadata_size + + chip->ecc.bytes * i; + + return poi; +} + +static inline int rk_nfc_data_len(struct nand_chip *chip) +{ + struct rk_nfc_nand_chip *rknand = to_rknand(chip); + + return chip->ecc.size + rknand->spare_per_sector; +} + +static inline u8 *rk_nfc_data_ptr(struct nand_chip *chip, int i) +{ + struct rk_nfc *nfc = nand_get_controller_data(chip); + + return nfc->buffer + i * rk_nfc_data_len(chip); +} + +static inline u8 *rk_nfc_oob_ptr(struct nand_chip *chip, int i) +{ + struct rk_nfc *nfc = nand_get_controller_data(chip); + + return nfc->buffer + i * rk_nfc_data_len(chip) + chip->ecc.size; +} + +static void rk_nfc_select_chip(struct nand_chip *chip, int cs) +{ + struct rk_nfc *nfc = nand_get_controller_data(chip); + struct rk_nfc_nand_chip *rknand = to_rknand(chip); + u32 val; + + if (cs < 0) { + nfc->selected_bank = -1; + /* Deselect the currently selected target. */ + val = readl_relaxed(nfc->regs + NFC_FMCTL); + val &= ~FMCTL_CE_SEL_M; + writel(val, nfc->regs + NFC_FMCTL); + return; + } + + nfc->selected_bank = rknand->sels[cs]; + nfc->band_offset = NFC_BANK + nfc->selected_bank * NFC_BANK_STEP; + + val = readl_relaxed(nfc->regs + NFC_FMCTL); + val &= ~FMCTL_CE_SEL_M; + val |= FMCTL_CE_SEL(nfc->selected_bank); + + writel(val, nfc->regs + NFC_FMCTL); +} + +static inline int rk_nfc_wait_ioready(struct rk_nfc *nfc) +{ + int rc; + u32 val; + + rc = readl_relaxed_poll_timeout(nfc->regs + NFC_FMCTL, val, + val & FMCTL_RDY, 10, NFC_TIMEOUT); + + return rc; +} + +static void rk_nfc_read_buf(struct rk_nfc *nfc, u8 *buf, int len) +{ + int i; + + for (i = 0; i < len; i++) + buf[i] = readb_relaxed(nfc->regs + nfc->band_offset + + BANK_DATA); +} + +static void rk_nfc_write_buf(struct rk_nfc *nfc, const u8 *buf, int len) +{ + int i; + + for (i = 0; i < len; i++) + writeb(buf[i], nfc->regs + nfc->band_offset + BANK_DATA); +} + +static int rk_nfc_cmd(struct nand_chip *chip, + const struct nand_subop *subop) +{ + struct rk_nfc *nfc = nand_get_controller_data(chip); + unsigned int i, j, remaining, start; + int reg_offset = nfc->band_offset; + u8 *inbuf = NULL; + const u8 *outbuf; + u32 cnt = 0; + int ret = 0; + + for (i = 0; i < subop->ninstrs; i++) { + const struct nand_op_instr *instr = &subop->instrs[i]; + + switch (instr->type) { + case NAND_OP_CMD_INSTR: + writeb(instr->ctx.cmd.opcode, + nfc->regs + reg_offset + BANK_CMD); + break; + + case NAND_OP_ADDR_INSTR: + remaining = nand_subop_get_num_addr_cyc(subop, i); + start = nand_subop_get_addr_start_off(subop, i); + + for (j = 0; j < 8 && j + start < remaining; j++) + writeb(instr->ctx.addr.addrs[j + start], + nfc->regs + reg_offset + BANK_ADDR); + break; + + case NAND_OP_DATA_IN_INSTR: + case NAND_OP_DATA_OUT_INSTR: + start = nand_subop_get_data_start_off(subop, i); + cnt = nand_subop_get_data_len(subop, i); + + if (instr->type == NAND_OP_DATA_OUT_INSTR) { + outbuf = instr->ctx.data.buf.out + start; + rk_nfc_write_buf(nfc, outbuf, cnt); + } else { + inbuf = instr->ctx.data.buf.in + start; + rk_nfc_read_buf(nfc, inbuf, cnt); + } + break; + + case NAND_OP_WAITRDY_INSTR: + if (rk_nfc_wait_ioready(nfc) < 0) { + ret = -ETIMEDOUT; + dev_err(nfc->dev, "IO not ready\n"); + } + break; + } + } + + return ret; +} + +static const struct nand_op_parser rk_nfc_op_parser = NAND_OP_PARSER( + NAND_OP_PARSER_PATTERN( + rk_nfc_cmd, + NAND_OP_PARSER_PAT_CMD_ELEM(true), + NAND_OP_PARSER_PAT_ADDR_ELEM(true, MAX_ADDRESS_CYC), + NAND_OP_PARSER_PAT_CMD_ELEM(true), + NAND_OP_PARSER_PAT_WAITRDY_ELEM(true), + NAND_OP_PARSER_PAT_DATA_IN_ELEM(true, MAX_DATA_SIZE)), + NAND_OP_PARSER_PATTERN( + rk_nfc_cmd, + NAND_OP_PARSER_PAT_CMD_ELEM(true), + NAND_OP_PARSER_PAT_ADDR_ELEM(true, MAX_ADDRESS_CYC), + NAND_OP_PARSER_PAT_DATA_OUT_ELEM(true, MAX_DATA_SIZE), + NAND_OP_PARSER_PAT_CMD_ELEM(true), + NAND_OP_PARSER_PAT_WAITRDY_ELEM(true)), +); + +static int rk_nfc_exec_op(struct nand_chip *chip, + const struct nand_operation *op, + bool check_only) +{ + if (!check_only) + rk_nfc_select_chip(chip, op->cs); + + return nand_op_parser_exec_op(chip, &rk_nfc_op_parser, op, + check_only); +} + +static int rk_nfc_setup_data_interface(struct nand_chip *chip, int csline, + const struct nand_interface_config *conf) +{ + struct rk_nfc *nfc = nand_get_controller_data(chip); + const struct nand_sdr_timings *timings; + u32 rate, tc2rw, trwpw, trw2c; + u32 temp; + + if (csline == NAND_DATA_IFACE_CHECK_ONLY) + return 0; + + timings = nand_get_sdr_timings(conf); + if (IS_ERR(timings)) + return -EOPNOTSUPP; + + if (IS_ERR(nfc->nfc_clk)) + rate = clk_get_rate(nfc->ahb_clk); + else + rate = clk_get_rate(nfc->nfc_clk); + + /* Turn clock rate into kHz. */ + rate /= 1000; + + tc2rw = 1; + trw2c = 1; + + trwpw = max(timings->tWC_min, timings->tRC_min) / 1000; + trwpw = DIV_ROUND_UP(trwpw * rate, 1000000); + + temp = timings->tREA_max / 1000; + temp = DIV_ROUND_UP(temp * rate, 1000000); + + if (trwpw < temp) + trwpw = temp; + + /* + * ACCON: access timing control register + * ------------------------------------- + * 31:18: reserved + * 17:12: csrw, clock cycles from the falling edge of CSn to the + * falling edge of RDn or WRn + * 11:11: reserved + * 10:05: rwpw, the width of RDn or WRn in processor clock cycles + * 04:00: rwcs, clock cycles from the rising edge of RDn or WRn to the + * rising edge of CSn + */ + temp = ACCTIMING(tc2rw, trwpw, trw2c); + writel(temp, nfc->regs + NFC_FMWAIT); + + return 0; +} + +static int rk_nfc_hw_ecc_setup(struct nand_chip *chip, + struct nand_ecc_ctrl *ecc, + uint32_t strength) +{ + struct rk_nfc *nfc = nand_get_controller_data(chip); + u32 reg, i; + + for (i = 0; i < NFC_ECC_MAX_MODES; i++) { + if (ecc->strength == nfc->cfg->ecc_strengths[i]) { + reg = nfc->cfg->ecc_cfgs[i]; + break; + } + } + + if (i >= NFC_ECC_MAX_MODES) + return -EINVAL; + + writel(reg, nfc->regs + nfc->cfg->bchctl_off); + + return 0; +} + +static void rk_nfc_xfer_start(struct rk_nfc *nfc, u8 rw, u8 n_KB, + dma_addr_t dma_data, dma_addr_t dma_oob) +{ + u32 dma_reg, fl_reg, bch_reg; + + dma_reg = DMA_ST | ((!rw) << DMA_WR) | DMA_EN | (2 << DMA_AHB_SIZE) | + (7 << DMA_BURST_SIZE) | (16 << DMA_INC_NUM); + + fl_reg = (rw << FLCTL_WR) | FLCTL_XFER_EN | FLCTL_ACORRECT | + (n_KB << FLCTL_XFER_SECTOR) | FLCTL_TOG_FIX; + + if (nfc->cfg->type == NFC_V6 || nfc->cfg->type == NFC_V8) { + bch_reg = readl_relaxed(nfc->regs + nfc->cfg->bchctl_off); + bch_reg = (bch_reg & (~BCHCTL_BANK_M)) | + (nfc->selected_bank << BCHCTL_BANK); + writel(bch_reg, nfc->regs + nfc->cfg->bchctl_off); + } + + writel(dma_reg, nfc->regs + nfc->cfg->dma_cfg_off); + writel((u32)dma_data, nfc->regs + nfc->cfg->dma_data_buf_off); + writel((u32)dma_oob, nfc->regs + nfc->cfg->dma_oob_buf_off); + writel(fl_reg, nfc->regs + nfc->cfg->flctl_off); + fl_reg |= FLCTL_XFER_ST; + writel(fl_reg, nfc->regs + nfc->cfg->flctl_off); +} + +static int rk_nfc_wait_for_xfer_done(struct rk_nfc *nfc) +{ + void __iomem *ptr; + int ret = 0; + u32 reg; + + ptr = nfc->regs + nfc->cfg->flctl_off; + + ret = readl_relaxed_poll_timeout(ptr, reg, + reg & FLCTL_XFER_READY, + 10, NFC_TIMEOUT); + + return ret; +} + +static int rk_nfc_write_page_raw(struct nand_chip *chip, const u8 *buf, + int oob_on, int page) +{ + struct mtd_info *mtd = nand_to_mtd(chip); + struct rk_nfc *nfc = nand_get_controller_data(chip); + int ret = 0; + u32 i; + + if (!buf) + memset(nfc->buffer, 0xff, mtd->writesize + mtd->oobsize); + + for (i = 0; i < chip->ecc.steps; i++) { + /* Copy data to nfc buffer. */ + if (buf) + memcpy(rk_nfc_data_ptr(chip, i), + nand_data_ptr(chip, buf, i), + chip->ecc.size); + /* + * The first four bytes of OOB are reserved for the + * boot ROM. In some debugging cases, sush as dump + * data and write back, the last four bytes stored + * in OOB need to be write back. + */ + if (!i) + memcpy(rk_nfc_oob_ptr(chip, i), + nand_oob_ptr(chip, chip->ecc.steps - 1), + NFC_SYS_DATA_SIZE); + else + memcpy(rk_nfc_oob_ptr(chip, i), + nand_oob_ptr(chip, i - 1), + NFC_SYS_DATA_SIZE); + /* Copy ecc data to nfc buffer. */ + memcpy(rk_nfc_oob_ptr(chip, i) + NFC_SYS_DATA_SIZE, + nand_oob_ecc_ptr(chip, i), + chip->ecc.bytes); + } + + nand_prog_page_begin_op(chip, page, 0, NULL, 0); + rk_nfc_write_buf(nfc, buf, mtd->writesize + mtd->oobsize); + ret = nand_prog_page_end_op(chip); + + /* + * Deselect the currently selected target after ops done, + * otherwise the NAND flash will has extra power consumption. + */ + rk_nfc_select_chip(chip, -1); + + return ret; +} + +static int rk_nfc_write_oob(struct nand_chip *chip, int page) +{ + return rk_nfc_write_page_raw(chip, NULL, 1, page); +} + +static int rk_nfc_write_page_hwecc(struct nand_chip *chip, const u8 *buf, + int oob_on, int page) +{ + struct mtd_info *mtd = nand_to_mtd(chip); + struct rk_nfc *nfc = nand_get_controller_data(chip); + struct rk_nfc_nand_chip *rknand = to_rknand(chip); + struct nand_ecc_ctrl *ecc = &chip->ecc; + int oob_step = (ecc->bytes > 60) ? NFC_MAX_OOB_PER_STEP : + NFC_MIN_OOB_PER_STEP; + int pages_per_blk = mtd->erasesize / mtd->writesize; + int ret = 0, i, boot_rom_mode = 0; + dma_addr_t dma_data, dma_oob; + u32 reg; + u8 *oob; + + nand_prog_page_begin_op(chip, page, 0, NULL, 0); + + memcpy(nfc->page_buf, buf, mtd->writesize); + + /* + * The first blocks (4, 8 or 16 depending on the device) are used + * by the boot ROM and the first 32 bits of oob need to link to + * the next page address in the same block. + * Config the ECC algorithm supported by the boot ROM. + */ + if ((page < pages_per_blk * rknand->boot_blks) && + (chip->options & NAND_IS_BOOT_MEDIUM)) { + boot_rom_mode = 1; + if (rknand->boot_ecc != ecc->strength) + rk_nfc_hw_ecc_setup(chip, ecc, + rknand->boot_ecc); + } + + for (i = 0; i < ecc->steps; i++) { + if (!i) { + reg = 0xFFFFFFFF; + } else { + oob = chip->oob_poi + (i - 1) * NFC_SYS_DATA_SIZE; + reg = oob[0] | oob[1] << 8 | oob[2] << 16 | + oob[3] << 24; + } + if (!i && boot_rom_mode) + reg = (page & (pages_per_blk - 1)) * 4; + + if (nfc->cfg->type == NFC_V9) + nfc->oob_buf[i] = reg; + else + nfc->oob_buf[i * oob_step / 4] = reg; + } + + dma_data = dma_map_single(nfc->dev, (void *)nfc->page_buf, + mtd->writesize, DMA_TO_DEVICE); + dma_oob = dma_map_single(nfc->dev, nfc->oob_buf, + ecc->steps * oob_step, + DMA_TO_DEVICE); + + reinit_completion(&nfc->done); + writel(INT_DMA, nfc->regs + nfc->cfg->int_en_off); + + rk_nfc_xfer_start(nfc, NFC_WRITE, ecc->steps, dma_data, + dma_oob); + ret = wait_for_completion_timeout(&nfc->done, + msecs_to_jiffies(100)); + if (!ret) + dev_warn(nfc->dev, "write: wait dma done timeout.\n"); + /* + * Whether the DMA transfer is completed or not. The driver + * needs to check the NFC`s status register to see if the data + * transfer was completed. + */ + ret = rk_nfc_wait_for_xfer_done(nfc); + + dma_unmap_single(nfc->dev, dma_data, mtd->writesize, + DMA_TO_DEVICE); + dma_unmap_single(nfc->dev, dma_oob, ecc->steps * oob_step, + DMA_TO_DEVICE); + + if (boot_rom_mode && rknand->boot_ecc != ecc->strength) + rk_nfc_hw_ecc_setup(chip, ecc, ecc->strength); + + if (ret) { + ret = -EIO; + dev_err(nfc->dev, + "write: wait transfer done timeout.\n"); + } + + if (ret) + return ret; + + ret = nand_prog_page_end_op(chip); + + /* + * Deselect the currently selected target after ops done, + * otherwise the NAND flash will has extra power consumption. + */ + rk_nfc_select_chip(chip, -1); + + return ret; +} + +static int rk_nfc_read_page_raw(struct nand_chip *chip, u8 *buf, int oob_on, + int page) +{ + struct mtd_info *mtd = nand_to_mtd(chip); + struct rk_nfc *nfc = nand_get_controller_data(chip); + int i; + + nand_read_page_op(chip, page, 0, NULL, 0); + rk_nfc_read_buf(nfc, nfc->buffer, mtd->writesize + mtd->oobsize); + + /* + * Deselect the currently selected target after ops done, + * otherwise the NAND flash will has extra power consumption. + */ + rk_nfc_select_chip(chip, -1); + + for (i = 0; i < chip->ecc.steps; i++) { + /* + * The first four bytes of OOB are reserved for the + * boot ROM. In some debugging cases, sush as dump data + * and write back, it`s need to read out this four bytes, + * otherwise this information will be lost during write back. + */ + if (!i) + memcpy(nand_oob_ptr(chip, chip->ecc.steps - 1), + rk_nfc_oob_ptr(chip, i), + NFC_SYS_DATA_SIZE); + else + memcpy(nand_oob_ptr(chip, i - 1), + rk_nfc_oob_ptr(chip, i), + NFC_SYS_DATA_SIZE); + /* Copy ecc data form nfc buffer. */ + memcpy(nand_oob_ecc_ptr(chip, i), + rk_nfc_oob_ptr(chip, i) + NFC_SYS_DATA_SIZE, + chip->ecc.bytes); + /* Copy data form nfc buffer. */ + if (buf) + memcpy(nand_data_ptr(chip, buf, i), + rk_nfc_data_ptr(chip, i), + chip->ecc.size); + } + + return 0; +} + +static int rk_nfc_read_oob(struct nand_chip *chip, int page) +{ + return rk_nfc_read_page_raw(chip, NULL, 1, page); +} + +static int rk_nfc_read_page_hwecc(struct nand_chip *chip, u8 *buf, int oob_on, + int page) +{ + struct mtd_info *mtd = nand_to_mtd(chip); + struct rk_nfc *nfc = nand_get_controller_data(chip); + struct rk_nfc_nand_chip *rknand = to_rknand(chip); + struct nand_ecc_ctrl *ecc = &chip->ecc; + int oob_step = (ecc->bytes > 60) ? NFC_MAX_OOB_PER_STEP : + NFC_MIN_OOB_PER_STEP; + int pages_per_blk = mtd->erasesize / mtd->writesize; + dma_addr_t dma_data, dma_oob; + int ret = 0, i, boot_rom_mode = 0; + int bitflips = 0, bch_st; + u8 *oob; + u32 tmp; + + nand_read_page_op(chip, page, 0, NULL, 0); + + dma_data = dma_map_single(nfc->dev, nfc->page_buf, + mtd->writesize, + DMA_FROM_DEVICE); + dma_oob = dma_map_single(nfc->dev, nfc->oob_buf, + ecc->steps * oob_step, + DMA_FROM_DEVICE); + + /* + * The first blocks (4, 8 or 16 depending on the device) + * are used by the boot ROM. + * Config the ECC algorithm supported by the boot ROM. + */ + if ((page < pages_per_blk * rknand->boot_blks) && + (chip->options & NAND_IS_BOOT_MEDIUM)) { + boot_rom_mode = 1; + if (rknand->boot_ecc != ecc->strength) + rk_nfc_hw_ecc_setup(chip, ecc, + rknand->boot_ecc); + } + + reinit_completion(&nfc->done); + writel(INT_DMA, nfc->regs + nfc->cfg->int_en_off); + rk_nfc_xfer_start(nfc, NFC_READ, ecc->steps, dma_data, + dma_oob); + ret = wait_for_completion_timeout(&nfc->done, + msecs_to_jiffies(100)); + if (!ret) + dev_warn(nfc->dev, "read: wait dma done timeout.\n"); + /* + * Whether the DMA transfer is completed or not. The driver + * needs to check the NFC`s status register to see if the data + * transfer was completed. + */ + ret = rk_nfc_wait_for_xfer_done(nfc); + dma_unmap_single(nfc->dev, dma_data, mtd->writesize, + DMA_FROM_DEVICE); + dma_unmap_single(nfc->dev, dma_oob, ecc->steps * oob_step, + DMA_FROM_DEVICE); + + if (ret) { + bitflips = -EIO; + dev_err(nfc->dev, + "read: wait transfer done timeout.\n"); + goto out; + } + + for (i = 1; i < ecc->steps; i++) { + oob = chip->oob_poi + (i - 1) * NFC_SYS_DATA_SIZE; + if (nfc->cfg->type == NFC_V9) + tmp = nfc->oob_buf[i]; + else + tmp = nfc->oob_buf[i * oob_step / 4]; + *oob++ = (u8)tmp; + *oob++ = (u8)(tmp >> 8); + *oob++ = (u8)(tmp >> 16); + *oob++ = (u8)(tmp >> 24); + } + + for (i = 0; i < ecc->steps / 2; i++) { + bch_st = readl_relaxed(nfc->regs + + nfc->cfg->bch_st_off + i * 4); + if (bch_st & BIT(nfc->cfg->ecc0.err_flag_bit) || + bch_st & BIT(nfc->cfg->ecc1.err_flag_bit)) { + mtd->ecc_stats.failed++; + /* ECC failed, return the minimum number of error bits */ + bitflips = ecc->strength + 1; + } else { + ret = ECC_ERR_CNT(bch_st, nfc->cfg->ecc0); + mtd->ecc_stats.corrected += ret; + bitflips = max_t(u32, bitflips, ret); + + ret = ECC_ERR_CNT(bch_st, nfc->cfg->ecc1); + mtd->ecc_stats.corrected += ret; + bitflips = max_t(u32, bitflips, ret); + } + } +out: + memcpy(buf, nfc->page_buf, mtd->writesize); + + if (boot_rom_mode && rknand->boot_ecc != ecc->strength) + rk_nfc_hw_ecc_setup(chip, ecc, ecc->strength); + + if (bitflips > ecc->strength) + dev_err(nfc->dev, "read page: %x ecc error!\n", page); + + /* + * Deselect the currently selected target after ops done, + * otherwise the NAND flash will has extra power consumption. + */ + rk_nfc_select_chip(chip, -1); + + return bitflips; +} + +static inline void rk_nfc_hw_init(struct rk_nfc *nfc) +{ + /* Disable flash wp. */ + writel(FMCTL_WP, nfc->regs + NFC_FMCTL); + /* Config default timing 40ns at 150 Mhz nfc clock. */ + writel(0x1081, nfc->regs + NFC_FMWAIT); + /* Disable randomizer and DMA. */ + writel(0, nfc->regs + nfc->cfg->randmz_off); + writel(0, nfc->regs + nfc->cfg->dma_cfg_off); + writel(FLCTL_RST, nfc->regs + nfc->cfg->flctl_off); +} + +static irqreturn_t rk_nfc_irq(int irq, void *id) +{ + struct rk_nfc *nfc = id; + u32 sta, ien; + + sta = readl_relaxed(nfc->regs + nfc->cfg->int_st_off); + ien = readl_relaxed(nfc->regs + nfc->cfg->int_en_off); + + if (!(sta & ien)) + return IRQ_NONE; + + writel(sta, nfc->regs + nfc->cfg->int_clr_off); + writel(~sta & ien, nfc->regs + nfc->cfg->int_en_off); + + complete(&nfc->done); + + return IRQ_HANDLED; +} + +static int rk_nfc_enable_clk(struct device *dev, struct rk_nfc *nfc) +{ + int ret; + + if (!IS_ERR(nfc->nfc_clk)) { + ret = clk_prepare_enable(nfc->nfc_clk); + if (ret) { + dev_err(dev, "failed to enable nfc clk\n"); + return ret; + } + } + + ret = clk_prepare_enable(nfc->ahb_clk); + if (ret) { + dev_err(dev, "failed to enable ahb clk\n"); + if (!IS_ERR(nfc->nfc_clk)) + clk_disable_unprepare(nfc->nfc_clk); + return ret; + } + + return 0; +} + +static void rk_nfc_disable_clk(struct rk_nfc *nfc) +{ + if (!IS_ERR(nfc->nfc_clk)) + clk_disable_unprepare(nfc->nfc_clk); + clk_disable_unprepare(nfc->ahb_clk); +} + +static int rk_nfc_ooblayout_free(struct mtd_info *mtd, int section, + struct mtd_oob_region *oob_region) +{ + struct nand_chip *chip = mtd_to_nand(mtd); + struct rk_nfc_nand_chip *rknand = to_rknand(chip); + + if (section) + return -ERANGE; + + /* + * The beginning of the oob area stores the reserved data for the NFC, + * the size of the reserved data is NFC_SYS_DATA_SIZE bytes. + */ + oob_region->length = rknand->metadata_size - NFC_SYS_DATA_SIZE - 2; + oob_region->offset = NFC_SYS_DATA_SIZE + 2; + + return 0; +} + +static int rk_nfc_ooblayout_ecc(struct mtd_info *mtd, int section, + struct mtd_oob_region *oob_region) +{ + struct nand_chip *chip = mtd_to_nand(mtd); + struct rk_nfc_nand_chip *rknand = to_rknand(chip); + + if (section) + return -ERANGE; + + oob_region->offset = rknand->metadata_size; + oob_region->length = mtd->oobsize - oob_region->offset; + + return 0; +} + +static const struct mtd_ooblayout_ops rk_nfc_ooblayout_ops = { + .free = rk_nfc_ooblayout_free, + .ecc = rk_nfc_ooblayout_ecc, +}; + +static int rk_nfc_ecc_init(struct device *dev, struct mtd_info *mtd) +{ + struct nand_chip *chip = mtd_to_nand(mtd); + struct rk_nfc *nfc = nand_get_controller_data(chip); + struct nand_ecc_ctrl *ecc = &chip->ecc; + const u8 *strengths = nfc->cfg->ecc_strengths; + u8 max_strength, nfc_max_strength; + int i; + + nfc_max_strength = nfc->cfg->ecc_strengths[0]; + /* If optional dt settings not present. */ + if (!ecc->size || !ecc->strength || + ecc->strength > nfc_max_strength) { + /* Use datasheet requirements. */ + ecc->strength = chip->base.eccreq.strength; + ecc->size = chip->base.eccreq.step_size; + + /* Align ECC strength and ECC size. */ + if (chip->ecc.size < 1024) { + if (mtd->writesize > 512) { + chip->ecc.size = 1024; + chip->ecc.strength <<= 1; + } else { + dev_err(dev, "Unsupported ecc.size\n"); + return -EINVAL; + } + } else { + chip->ecc.size = 1024; + } + + ecc->steps = mtd->writesize / ecc->size; + + /* + * HW ECC always requests the number of ECC bytes per 1024 byte + * blocks. 4 Bytes is oob for sys data. + */ + max_strength = ((mtd->oobsize / ecc->steps) - 4) * 8 / + fls(8 * 1024); + if (max_strength > nfc_max_strength) + max_strength = nfc_max_strength; + + for (i = 0; i < 4; i++) { + if (max_strength >= strengths[i]) + break; + } + + if (i >= 4) { + dev_err(nfc->dev, "Unsupported ECC strength\n"); + return -EOPNOTSUPP; + } + + ecc->strength = strengths[i]; + } + ecc->steps = mtd->writesize / ecc->size; + ecc->bytes = DIV_ROUND_UP(ecc->strength * fls(8 * 1024), 8); + /* HW ECC always work with even numbers of ECC bytes. */ + ecc->bytes = ALIGN(ecc->bytes, 2); + + rk_nfc_hw_ecc_setup(chip, ecc, ecc->strength); + + return 0; +} + +static int rk_nfc_attach_chip(struct nand_chip *chip) +{ + struct mtd_info *mtd = nand_to_mtd(chip); + struct device *dev = mtd->dev.parent; + struct rk_nfc *nfc = nand_get_controller_data(chip); + struct rk_nfc_nand_chip *rknand = to_rknand(chip); + struct nand_ecc_ctrl *ecc = &chip->ecc; + u8 *temp_buf; + int len, oob_len; + int ret; + + if (chip->options & NAND_BUSWIDTH_16) { + dev_err(dev, "16 bits bus width not supported"); + return -EINVAL; + } + + if (ecc->mode != NAND_ECC_HW) + return 0; + + ret = rk_nfc_ecc_init(dev, mtd); + if (ret) + return ret; + rknand->spare_per_sector = ecc->bytes + NFC_SYS_DATA_SIZE; + rknand->metadata_size = NFC_SYS_DATA_SIZE * ecc->steps; + + if (rknand->metadata_size < NFC_SYS_DATA_SIZE + 2) { + dev_err(dev, + "Driver needs at least %d bytes of meta data\n", + NFC_SYS_DATA_SIZE + 2); + return -EIO; + } + len = mtd->writesize + mtd->oobsize; + + /* Check buffer first, avoid duplicate alloc buffer. */ + if (nfc->buffer) { + if (len > nfc->buffer_size) { + temp_buf = kzalloc(len, GFP_KERNEL | GFP_DMA); + if (!temp_buf) + return -ENOMEM; + kfree(nfc->buffer); + nfc->buffer = temp_buf; + nfc->buffer_size = len; + + oob_len = ecc->steps * NFC_MAX_OOB_PER_STEP; + temp_buf = kzalloc(oob_len, GFP_KERNEL | GFP_DMA); + if (!temp_buf) + return -ENOMEM; + kfree(nfc->oob_buf); + nfc->oob_buf = (u32 *)temp_buf; + } + return 0; + } + + nfc->buffer = kzalloc(len, GFP_KERNEL | GFP_DMA); + if (!nfc->buffer) + return -ENOMEM; + + oob_len = ecc->steps * NFC_MAX_OOB_PER_STEP; + nfc->oob_buf = kzalloc(oob_len, GFP_KERNEL | GFP_DMA); + if (!nfc->oob_buf) { + kfree(nfc->buffer); + nfc->buffer = NULL; + nfc->oob_buf = NULL; + return -ENOMEM; + } + + nfc->buffer_size = len; + nfc->page_buf = nfc->buffer; + + chip->ecc.write_page_raw = rk_nfc_write_page_raw; + chip->ecc.write_page = rk_nfc_write_page_hwecc; + chip->ecc.write_oob_raw = rk_nfc_write_oob; + chip->ecc.write_oob = rk_nfc_write_oob; + + chip->ecc.read_page_raw = rk_nfc_read_page_raw; + chip->ecc.read_page = rk_nfc_read_page_hwecc; + chip->ecc.read_oob_raw = rk_nfc_read_oob; + chip->ecc.read_oob = rk_nfc_read_oob; + + return 0; +} + +static const struct nand_controller_ops rk_nfc_controller_ops = { + .attach_chip = rk_nfc_attach_chip, + .exec_op = rk_nfc_exec_op, + .setup_interface = rk_nfc_setup_data_interface, +}; + +static int rk_nfc_nand_chip_init(struct device *dev, struct rk_nfc *nfc, + struct device_node *np) +{ + struct rk_nfc_nand_chip *rknand; + struct nand_chip *chip; + struct mtd_info *mtd; + int nsels; + u32 tmp; + int ret; + int i; + + if (!of_get_property(np, "reg", &nsels)) + return -ENODEV; + nsels /= sizeof(u32); + if (!nsels || nsels > NFC_MAX_NSELS) { + dev_err(dev, "invalid reg property size %d\n", nsels); + return -EINVAL; + } + + rknand = devm_kzalloc(dev, sizeof(*rknand) + nsels * sizeof(u8), + GFP_KERNEL); + if (!rknand) + return -ENOMEM; + + rknand->nsels = nsels; + for (i = 0; i < nsels; i++) { + ret = of_property_read_u32_index(np, "reg", i, &tmp); + if (ret) { + dev_err(dev, "reg property failure : %d\n", ret); + return ret; + } + + if (tmp >= NFC_MAX_NSELS) { + dev_err(dev, "invalid CS: %u\n", tmp); + return -EINVAL; + } + + if (test_and_set_bit(tmp, &nfc->assigned_cs)) { + dev_err(dev, "CS %u already assigned\n", tmp); + return -EINVAL; + } + + rknand->sels[i] = tmp; + } + + chip = &rknand->chip; + chip->controller = &nfc->controller; + + nand_set_flash_node(chip, np); + + nand_set_controller_data(chip, nfc); + + chip->options |= NAND_USES_DMA | NAND_NO_SUBPAGE_WRITE; + chip->bbt_options = NAND_BBT_USE_FLASH | NAND_BBT_NO_OOB; + + /* Set default mode in case dt entry is missing. */ + chip->ecc.mode = NAND_ECC_HW; + + mtd = nand_to_mtd(chip); + mtd->owner = THIS_MODULE; + mtd->dev.parent = dev; + + if (!mtd->name) { + dev_err(nfc->dev, "NAND label property is mandatory\n"); + return -EINVAL; + } + + mtd_set_ooblayout(mtd, &rk_nfc_ooblayout_ops); + rk_nfc_hw_init(nfc); + ret = nand_scan(chip, nsels); + if (ret) + return ret; + + if (chip->options & NAND_IS_BOOT_MEDIUM) { + ret = of_property_read_u32(np, "rockchip,boot-blks", &tmp); + rknand->boot_blks = ret ? 0 : tmp; + + ret = of_property_read_u32(np, "rockchip,boot-ecc-strength", + &tmp); + rknand->boot_ecc = ret ? chip->ecc.strength : tmp; + } + + ret = mtd_device_register(mtd, NULL, 0); + if (ret) { + dev_err(dev, "mtd parse partition error\n"); + nand_cleanup(chip); + return ret; + } + + list_add_tail(&rknand->node, &nfc->chips); + + return 0; +} + +static void rk_nfc_chips_cleanup(struct rk_nfc *nfc) +{ + struct rk_nfc_nand_chip *rknand, *tmp; + struct nand_chip *chip; + int ret; + + list_for_each_entry_safe(rknand, tmp, &nfc->chips, node) { + chip = &rknand->chip; + ret = mtd_device_unregister(nand_to_mtd(chip)); + WARN_ON(ret); + nand_cleanup(chip); + list_del(&rknand->node); + } +} + +static int rk_nfc_nand_chips_init(struct device *dev, struct rk_nfc *nfc) +{ + struct device_node *np = dev->of_node, *nand_np; + int nchips = of_get_child_count(np); + int ret; + + if (!nchips || nchips > NFC_MAX_NSELS) { + dev_err(nfc->dev, "Incorrect number of NAND chips (%d)\n", + nchips); + return -EINVAL; + } + + for_each_child_of_node(np, nand_np) { + ret = rk_nfc_nand_chip_init(dev, nfc, nand_np); + if (ret) { + of_node_put(nand_np); + rk_nfc_chips_cleanup(nfc); + return ret; + } + } + + return 0; +} + +static struct nfc_cfg nfc_v6_cfg = { + .type = NFC_V6, + .ecc_strengths = {60, 40, 24, 16}, + .ecc_cfgs = { + 0x00040011, 0x00040001, 0x00000011, 0x00000001, + }, + .flctl_off = 0x08, + .bchctl_off = 0x0C, + .dma_cfg_off = 0x10, + .dma_data_buf_off = 0x14, + .dma_oob_buf_off = 0x18, + .dma_st_off = 0x1C, + .bch_st_off = 0x20, + .randmz_off = 0x150, + .int_en_off = 0x16C, + .int_clr_off = 0x170, + .int_st_off = 0x174, + .oob0_off = 0x200, + .oob1_off = 0x230, + .ecc0 = { + .err_flag_bit = 2, + .low = 3, + .low_mask = 0x1F, + .low_bn = 5, + .high = 27, + .high_mask = 0x1, + }, + .ecc1 = { + .err_flag_bit = 15, + .low = 16, + .low_mask = 0x1F, + .low_bn = 5, + .high = 29, + .high_mask = 0x1, + }, +}; + +static struct nfc_cfg nfc_v8_cfg = { + .type = NFC_V8, + .ecc_strengths = {16, 16, 16, 16}, + .ecc_cfgs = { + 0x00000001, 0x00000001, 0x00000001, 0x00000001, + }, + .flctl_off = 0x08, + .bchctl_off = 0x0C, + .dma_cfg_off = 0x10, + .dma_data_buf_off = 0x14, + .dma_oob_buf_off = 0x18, + .dma_st_off = 0x1C, + .bch_st_off = 0x20, + .randmz_off = 0x150, + .int_en_off = 0x16C, + .int_clr_off = 0x170, + .int_st_off = 0x174, + .oob0_off = 0x200, + .oob1_off = 0x230, + .ecc0 = { + .err_flag_bit = 2, + .low = 3, + .low_mask = 0x1F, + .low_bn = 5, + .high = 27, + .high_mask = 0x1, + }, + .ecc1 = { + .err_flag_bit = 15, + .low = 16, + .low_mask = 0x1F, + .low_bn = 5, + .high = 29, + .high_mask = 0x1, + }, +}; + +static struct nfc_cfg nfc_v9_cfg = { + .type = NFC_V9, + .ecc_strengths = {70, 60, 40, 16}, + .ecc_cfgs = { + 0x00000001, 0x06000001, 0x04000001, 0x02000001, + }, + .flctl_off = 0x10, + .bchctl_off = 0x20, + .dma_cfg_off = 0x30, + .dma_data_buf_off = 0x34, + .dma_oob_buf_off = 0x38, + .dma_st_off = 0x3C, + .bch_st_off = 0x150, + .randmz_off = 0x208, + .int_en_off = 0x120, + .int_clr_off = 0x124, + .int_st_off = 0x128, + .oob0_off = 0x200, + .oob1_off = 0x204, + .ecc0 = { + .err_flag_bit = 2, + .low = 3, + .low_mask = 0x7F, + .low_bn = 7, + .high = 0, + .high_mask = 0x0, + }, + .ecc1 = { + .err_flag_bit = 18, + .low = 19, + .low_mask = 0x7F, + .low_bn = 7, + .high = 0, + .high_mask = 0x0, + }, +}; + +static const struct of_device_id rk_nfc_id_table[] = { + { + .compatible = "rockchip,px30-nfc", + .data = &nfc_v9_cfg + }, + { + .compatible = "rockchip,rk2928-nfc", + .data = &nfc_v6_cfg + }, + { + .compatible = "rockchip,rv1108-nfc", + .data = &nfc_v8_cfg + }, + { /* sentinel */ } +}; +MODULE_DEVICE_TABLE(of, rk_nfc_id_table); + +static int rk_nfc_probe(struct platform_device *pdev) +{ + struct device *dev = &pdev->dev; + struct rk_nfc *nfc; + int ret, irq; + + nfc = devm_kzalloc(dev, sizeof(*nfc), GFP_KERNEL); + if (!nfc) + return -ENOMEM; + + nand_controller_init(&nfc->controller); + INIT_LIST_HEAD(&nfc->chips); + nfc->controller.ops = &rk_nfc_controller_ops; + + nfc->cfg = of_device_get_match_data(dev); + nfc->dev = dev; + + init_completion(&nfc->done); + + nfc->regs = devm_platform_ioremap_resource(pdev, 0); + if (IS_ERR(nfc->regs)) { + ret = PTR_ERR(nfc->regs); + goto release_nfc; + } + + nfc->nfc_clk = devm_clk_get(dev, "nfc"); + if (IS_ERR(nfc->nfc_clk)) { + dev_dbg(dev, "no nfc clk\n"); + /* Some earlier models, such as rk3066, have no nfc clk. */ + } + + nfc->ahb_clk = devm_clk_get(dev, "ahb"); + if (IS_ERR(nfc->ahb_clk)) { + dev_err(dev, "no ahb clk\n"); + ret = PTR_ERR(nfc->ahb_clk); + goto release_nfc; + } + + ret = rk_nfc_enable_clk(dev, nfc); + if (ret) + goto release_nfc; + + irq = platform_get_irq(pdev, 0); + if (irq < 0) { + dev_err(dev, "no nfc irq resource\n"); + ret = -EINVAL; + goto clk_disable; + } + + writel(0, nfc->regs + nfc->cfg->int_en_off); + ret = devm_request_irq(dev, irq, rk_nfc_irq, 0x0, "rk-nand", nfc); + if (ret) { + dev_err(dev, "failed to request nfc irq\n"); + goto clk_disable; + } + + platform_set_drvdata(pdev, nfc); + + ret = rk_nfc_nand_chips_init(dev, nfc); + if (ret) { + dev_err(dev, "failed to init NAND chips\n"); + goto clk_disable; + } + return 0; + +clk_disable: + rk_nfc_disable_clk(nfc); +release_nfc: + return ret; +} + +static int rk_nfc_remove(struct platform_device *pdev) +{ + struct rk_nfc *nfc = platform_get_drvdata(pdev); + + kfree(nfc->buffer); + kfree(nfc->oob_buf); + rk_nfc_chips_cleanup(nfc); + rk_nfc_disable_clk(nfc); + + return 0; +} + +static int __maybe_unused rk_nfc_suspend(struct device *dev) +{ + struct rk_nfc *nfc = dev_get_drvdata(dev); + + rk_nfc_disable_clk(nfc); + + return 0; +} + +static int __maybe_unused rk_nfc_resume(struct device *dev) +{ + struct rk_nfc *nfc = dev_get_drvdata(dev); + struct rk_nfc_nand_chip *rknand; + struct nand_chip *chip; + int ret; + u32 i; + + ret = rk_nfc_enable_clk(dev, nfc); + if (ret) + return ret; + + /* Reset NAND chip if VCC was powered off. */ + list_for_each_entry(rknand, &nfc->chips, node) { + chip = &rknand->chip; + for (i = 0; i < rknand->nsels; i++) + nand_reset(chip, i); + } + + return 0; +} + +static const struct dev_pm_ops rk_nfc_pm_ops = { + SET_SYSTEM_SLEEP_PM_OPS(rk_nfc_suspend, rk_nfc_resume) +}; + +static struct platform_driver rk_nfc_driver = { + .probe = rk_nfc_probe, + .remove = rk_nfc_remove, + .driver = { + .name = "rockchip-nfc", + .of_match_table = rk_nfc_id_table, + .pm = &rk_nfc_pm_ops, + }, +}; + +module_platform_driver(rk_nfc_driver); + +MODULE_LICENSE("Dual MIT/GPL"); +MODULE_AUTHOR("Yifeng Zhao "); +MODULE_DESCRIPTION("Rockchip Nand Flash Controller Driver"); +MODULE_ALIAS("platform:rockchip-nand-controller");