From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-9.8 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI, SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 4A7DAC4332D for ; Fri, 20 Mar 2020 09:35:10 +0000 (UTC) Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (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 123E020409 for ; Fri, 20 Mar 2020 09:35:10 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=lists.infradead.org header.i=@lists.infradead.org header.b="TxW0nZvE" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 123E020409 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-mtd-bounces+linux-mtd=archiver.kernel.org@lists.infradead.org DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.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=QsieXGYgujEHHSB4f6xugKHxVu8nVte0pVKDjYLpEEg=; b=TxW0nZvEWaeFBW3nsCsrheCfio tXLeotN9GVbzEqZAl5AgNt99fhD6eMc0zEsFQn3fNvhHvAUHIsOi9skQCCyGPeixIxO4JU7R82lUL eZEdK7PJ26s63D2GNjnZP5B/FN/SQ0Nk00GSiW0oOFGNe0FzZ2tSNGfc5Xtrk3rm4iFQESriXLGfo 3RAIYP4DPXcvAMio6Dfp2wwvK7ERg9Lp/M7c7TSE5T8fp3A++DMW/InaOF53826Szj/P1T+5i6l5G j5rUNIZD8JSStcG80oI/QvFg65IojCdY1mUe965cWGW78b9WPaKSCkC3sOMgHhSEOlO9LQQcaBCdG GIQdtOtQ==; Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.92.3 #3 (Red Hat Linux)) id 1jFE3H-0002NN-CY; Fri, 20 Mar 2020 09:34:51 +0000 Received: from lucky1.263xmail.com ([211.157.147.134]) by bombadil.infradead.org with esmtps (Exim 4.92.3 #3 (Red Hat Linux)) id 1jFE2i-0001sB-Qk; Fri, 20 Mar 2020 09:34:23 +0000 Received: from localhost (unknown [192.168.167.32]) by lucky1.263xmail.com (Postfix) with ESMTP id 5F0918B5F4; Fri, 20 Mar 2020 17:34:03 +0800 (CST) X-MAIL-GRAY: 0 X-MAIL-DELIVERY: 1 X-ADDR-CHECKED4: 1 X-ANTISPAM-LEVEL: 2 X-ABS-CHECKED: 0 Received: from ubuntu18.lan (unknown [58.22.7.114]) by smtp.263.net (postfix) whith ESMTP id P19134T140660085376768S1584696835111908_; Fri, 20 Mar 2020 17:34:02 +0800 (CST) X-IP-DOMAINF: 1 X-UNIQUE-TAG: <7c2911366913ad44fc0fcbf213bb2c89> 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 v4 1/3] mtd: rawnand: rockchip: NFC drivers for RK3308, RK3188 and others Date: Fri, 20 Mar 2020 17:33:40 +0800 Message-Id: <20200320093342.15470-2-yifeng.zhao@rock-chips.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20200320093342.15470-1-yifeng.zhao@rock-chips.com> References: <20200320093342.15470-1-yifeng.zhao@rock-chips.com> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20200320_023417_562355_D8E6C07B X-CRM114-Status: GOOD ( 21.14 ) X-BeenThere: linux-mtd@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Linux MTD discussion mailing list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: devicetree@vger.kernel.org, Yifeng Zhao , linux-mtd@lists.infradead.org, heiko@sntech.de, linux-rockchip@lists.infradead.org MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-mtd" Errors-To: linux-mtd-bounces+linux-mtd=archiver.kernel.org@lists.infradead.org This driver supports Rockchip NFC (NAND Flash Controller) found on RK3308, RK3368, RKPX30, RV1108 and other SOCs. The driver has been tested using 8-bit NAND interface on the ARM based RK3308 platform. Support Rockchip NFC versions: - V6: ECC 16, 24, 40 and 60 bits per 1KB data. Found on RK3066, RK3368, RK3229, RK3188, RK3288, RK3128, RKPX3SE, RKPx3, RKPX5, RK3036 and RK3126. - V8: ECC 16 bits per 1KB data. Found on RV1108/7, RK3308. - V9: ECC 16, 40, 60 and 70 bits per 1KB data. Found on RK3326, RKPX30. Support feature: - Read full page data by DMA. - Support HW ECC(one step is 1KB). - Support 2 - 32K page size. - Support 4 CS(depend on Soc) Limitations: - Unsupport 512B ecc step. - Raw page read and write without ecc redundancy code. So could not support raw data dump and restore. - Untested on some SOCs. - Unsupport subpage. - Unsupport randomizer. - The original bad block mask is not supported. It is recommended to use the BBT(bad block table). Signed-off-by: Yifeng Zhao --- 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 | 7 + drivers/mtd/nand/raw/Makefile | 1 + drivers/mtd/nand/raw/rockchip_nand.c | 1315 ++++++++++++++++++++++++++ 3 files changed, 1323 insertions(+) create mode 100644 drivers/mtd/nand/raw/rockchip_nand.c diff --git a/drivers/mtd/nand/raw/Kconfig b/drivers/mtd/nand/raw/Kconfig index a80a46bb5b8b..8313b12a9d85 100644 --- a/drivers/mtd/nand/raw/Kconfig +++ b/drivers/mtd/nand/raw/Kconfig @@ -433,6 +433,13 @@ config MTD_NAND_MESON Enables support for NAND controller on Amlogic's Meson SoCs. This controller is found on Meson SoCs. +config MTD_NAND_ROCKCHIP + tristate "Rockchip NAND controller" + depends on ARCH_ROCKCHIP || COMPILE_TEST + depends on HAS_IOMEM + help + Enables support for NAND controller on Rockchip SoCs. + config MTD_NAND_GPIO tristate "GPIO assisted NAND controller" depends on GPIOLIB || COMPILE_TEST diff --git a/drivers/mtd/nand/raw/Makefile b/drivers/mtd/nand/raw/Makefile index 2d136b158fb7..8bafa59b8940 100644 --- a/drivers/mtd/nand/raw/Makefile +++ b/drivers/mtd/nand/raw/Makefile @@ -58,6 +58,7 @@ obj-$(CONFIG_MTD_NAND_TEGRA) += tegra_nand.o obj-$(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_ROCKCHIP) += rockchip_nand.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.c b/drivers/mtd/nand/raw/rockchip_nand.c new file mode 100644 index 000000000000..1e37a1b6c702 --- /dev/null +++ b/drivers/mtd/nand/raw/rockchip_nand.c @@ -0,0 +1,1315 @@ +// SPDX-License-Identifier: GPL-2.0 OR MIT +/* + * Rockchip NAND Flash controller driver. + * Copyright (C) 2020 Rockchip Inc. + * Authors: Yifeng Zhao + */ + +#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 THIS_NAME "rk-nand" +#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 (4) /* Some Soc only has 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 nand; + + u32 spare_per_sector; + u32 oob_buf_per_sector; + + int nsels; + u8 sels[0]; + /* nothing after this field */ +}; + +struct rk_nfc_clk { + int nfc_rate; + struct clk *nfc_clk; + struct clk *ahb_clk; +}; + +struct rk_nfc { + struct nand_controller controller; + struct rk_nfc_clk clk; + + struct device *dev; + const struct nfc_cfg *cfg; + void __iomem *regs; + + int selected_bank; + int band_offset; + + struct completion done; + struct list_head chips; + + u8 *buffer; + u8 *page_buf; + u32 *oob_buf; + + unsigned long assigned_cs; +}; + +static inline struct rk_nfc_nand_chip *to_rk_nand(struct nand_chip *nand) +{ + return container_of(nand, struct rk_nfc_nand_chip, nand); +} + +static inline u8 *data_ptr(struct nand_chip *chip, const u8 *p, int i) +{ + return (u8 *)p + i * chip->ecc.size; +} + +static inline u8 *oob_ptr(struct nand_chip *chip, int i) +{ + u8 *poi; + + poi = chip->oob_poi + i * NFC_SYS_DATA_SIZE; + + return poi; +} + +static inline int rk_data_len(struct nand_chip *chip) +{ + struct rk_nfc_nand_chip *rk_nand = to_rk_nand(chip); + + return chip->ecc.size + rk_nand->spare_per_sector; +} + +static inline u8 *rk_data_ptr(struct nand_chip *chip, int i) +{ + struct rk_nfc *nfc = nand_get_controller_data(chip); + + return nfc->buffer + i * rk_data_len(chip); +} + +static inline u8 *rk_oob_ptr(struct nand_chip *chip, int i) +{ + struct rk_nfc *nfc = nand_get_controller_data(chip); + + return nfc->buffer + i * rk_data_len(chip) + chip->ecc.size; +} + +static void rk_nfc_select_chip(struct nand_chip *nand, int chip) +{ + struct rk_nfc *nfc = nand_get_controller_data(nand); + struct rk_nfc_nand_chip *rk_nand = to_rk_nand(nand); + u32 val; + + if (chip < 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 = rk_nand->sels[chip]; + 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 void rk_nfc_wait_ioready(struct rk_nfc *nfc) +{ + int rc; + u32 val; + + rc = readl_poll_timeout_atomic(nfc->regs + NFC_FMCTL, val, + val & FMCTL_RDY, 10, NFC_TIMEOUT); + if (rc < 0) + dev_err(nfc->dev, "data not ready\n"); +} + +static inline u8 rk_nfc_read_byte(struct nand_chip *chip) +{ + struct rk_nfc *nfc = nand_get_controller_data(chip); + + return readb_relaxed(nfc->regs + nfc->band_offset + BANK_DATA); +} + +static void rk_nfc_read_buf(struct nand_chip *chip, u8 *buf, int len) +{ + int i; + + for (i = 0; i < len; i++) + buf[i] = rk_nfc_read_byte(chip); +} + +static void rk_nfc_write_byte(struct nand_chip *chip, u8 byte) +{ + struct rk_nfc *nfc = nand_get_controller_data(chip); + + writeb(byte, nfc->regs + nfc->band_offset + BANK_DATA); +} + +static void rk_nfc_write_buf(struct nand_chip *chip, const u8 *buf, int len) +{ + int i; + + for (i = 0; i < len; i++) + rk_nfc_write_byte(chip, buf[i]); +} + +static int rk_nfc_cmd(struct nand_chip *chip, + const struct nand_subop *subop) +{ + struct rk_nfc *nfc = nand_get_controller_data(chip); + u32 cnt = 0; + unsigned int i, j, remaining, start; + int reg_offset = nfc->band_offset; + u8 *inbuf = NULL; + const u8 *outbuf; + void __iomem *data_reg; + + 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); + data_reg = nfc->regs + nfc->band_offset + BANK_DATA; + + if (instr->type == NAND_OP_DATA_OUT_INSTR) { + outbuf = instr->ctx.data.buf.out + start; + for (j = 0; j < cnt; j++) + writeb(outbuf[j], data_reg); + } else { + inbuf = instr->ctx.data.buf.in + start; + for (j = 0; j < cnt; j++) + inbuf[j] = readb_relaxed(data_reg); + } + break; + + case NAND_OP_WAITRDY_INSTR: + rk_nfc_wait_ioready(nfc); + break; + } + } + + return 0; +} + +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) +{ + 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_data_interface *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; + + /* not onfi nand flash */ + if (!chip->parameters.onfi) + return 0; + + timings = nand_get_sdr_timings(conf); + if (IS_ERR(timings)) + return -ENOTSUPP; + + rate = clk_get_rate(nfc->clk.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 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) +{ + u32 reg; + int ret = 0; + void __iomem *ptr; + + ptr = nfc->regs + nfc->cfg->flctl_off; + + ret = readl_poll_timeout_atomic(ptr, reg, + reg & FLCTL_XFER_READY, + 10, NFC_TIMEOUT); + if (ret) + dev_err(nfc->dev, "timeout reg=%x\n", reg); + + return ret; +} + +static int rk_nfc_write_page(struct mtd_info *mtd, struct nand_chip *chip, + const u8 *buf, int page, int raw) +{ + struct rk_nfc *nfc = nand_get_controller_data(chip); + struct nand_ecc_ctrl *ecc = &chip->ecc; + u8 *oob; + dma_addr_t dma_data, dma_oob; + int oob_step = (ecc->bytes > 60) ? NFC_MAX_OOB_PER_STEP : + NFC_MIN_OOB_PER_STEP; + int pages_per_blk = mtd->erasesize / mtd->writesize; + u32 reg; + int ret = 0, i; + + nand_prog_page_begin_op(chip, page, 0, NULL, 0); + + if (!raw) { + memcpy(nfc->page_buf, buf, mtd->writesize); + memset(nfc->oob_buf, 0xff, oob_step * ecc->steps); + /* + * The first 8 blocks is stored loader, the first + * 32 bits of oob need link to next page address + * in the same block for Bootrom. + * Swap the first oob with the seventh oob, + * and bad block mask save at seventh oob. + */ + swap(chip->oob_poi[0], chip->oob_poi[7]); + for (i = 0; i < ecc->steps; i++) { + oob = chip->oob_poi + i * NFC_SYS_DATA_SIZE; + reg = (oob[2] << 16) | (oob[3] << 24); + if (!i && page < pages_per_blk * 8) + reg |= (page & (pages_per_blk - 1)) * 4; + else + reg |= oob[0] | (oob[1] << 8); + + if (nfc->cfg->type == NFC_V6 || + nfc->cfg->type == NFC_V8) + nfc->oob_buf[i * oob_step / 4] = reg; + else + nfc->oob_buf[i] = 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); + + init_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) + ret = -ETIMEDOUT; + 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); + } else { + rk_nfc_write_buf(chip, buf, mtd->writesize + + mtd->oobsize); + } + + if (ret) + return ret; + + ret = nand_prog_page_end_op(chip); + + /* Deselect the currently selected target */ + rk_nfc_select_chip(chip, -1); + + 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); + u32 i; + + memset(nfc->buffer, 0xff, mtd->writesize + mtd->oobsize); + swap(chip->oob_poi[0], chip->oob_poi[7]); + for (i = 0; i < chip->ecc.steps; i++) { + if (buf) + memcpy(rk_data_ptr(chip, i), data_ptr(chip, buf, i), + chip->ecc.size); + + memcpy(rk_oob_ptr(chip, i), oob_ptr(chip, i), + NFC_SYS_DATA_SIZE); + } + + return rk_nfc_write_page(mtd, chip, nfc->buffer, page, 1); +} + +static int rk_nfc_write_oob_std(struct nand_chip *chip, int page) +{ + return rk_nfc_write_page_raw(chip, NULL, 1, page); +} + +static int rk_nfc_read_page(struct mtd_info *mtd, struct nand_chip *chip, + u32 data_offs, u32 readlen, + u8 *buf, int page, int raw) +{ + struct rk_nfc *nfc = nand_get_controller_data(chip); + struct nand_ecc_ctrl *ecc = &chip->ecc; + dma_addr_t dma_data, dma_oob; + int oob_step = (ecc->bytes > 60) ? NFC_MAX_OOB_PER_STEP : + NFC_MIN_OOB_PER_STEP; + int bitflips = 0; + int ret, i, bch_st; + u8 *oob; + u32 tmp; + + nand_read_page_op(chip, page, 0, NULL, 0); + if (!raw) { + 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); + init_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 ahb/dma done timeout\n"); + 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); + + for (i = 0; i < ecc->steps; i++) { + oob = chip->oob_poi + i * NFC_SYS_DATA_SIZE; + if (nfc->cfg->type == NFC_V6 || + nfc->cfg->type == NFC_V8) + tmp = nfc->oob_buf[i * oob_step / 4]; + else + tmp = nfc->oob_buf[i]; + *oob++ = (u8)tmp; + *oob++ = (u8)(tmp >> 8); + *oob++ = (u8)(tmp >> 16); + *oob++ = (u8)(tmp >> 24); + } + swap(chip->oob_poi[0], chip->oob_poi[7]); + 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++; + bitflips = -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); + } + } + memcpy(buf, nfc->page_buf, mtd->writesize); + + if (bitflips == -1) + dev_err(nfc->dev, "read_page %x %x %x %x %x %x\n", + page, bitflips, bch_st, ((u32 *)buf)[0], + ((u32 *)buf)[1], (u32)dma_data); + } else { + rk_nfc_read_buf(chip, buf, mtd->writesize + mtd->oobsize); + } + + /* Deselect the currently selected target */ + rk_nfc_select_chip(chip, -1); + + return bitflips; +} + +static int rk_nfc_write_page_hwecc(struct nand_chip *chip, const u8 *buf, + int oob_on, int page) +{ + return rk_nfc_write_page(nand_to_mtd(chip), chip, buf, page, 0); +} + +static int rk_nfc_read_page_hwecc(struct nand_chip *chip, u8 *p, int oob_on, + int pg) +{ + struct mtd_info *mtd = nand_to_mtd(chip); + + return rk_nfc_read_page(mtd, chip, 0, mtd->writesize, p, pg, 0); +} + +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, ret; + + ret = rk_nfc_read_page(mtd, chip, 0, mtd->writesize, nfc->buffer, + page, 1); + if (ret < 0) + return ret; + + for (i = 0; i < chip->ecc.steps; i++) { + memcpy(oob_ptr(chip, i), rk_oob_ptr(chip, i), + NFC_SYS_DATA_SIZE); + + if (buf) + memcpy(data_ptr(chip, buf, i), rk_data_ptr(chip, i), + chip->ecc.size); + } + swap(chip->oob_poi[0], chip->oob_poi[7]); + + return ret; +} + +static int rk_nfc_read_oob_std(struct nand_chip *chip, int page) +{ + return rk_nfc_read_page_raw(chip, NULL, 1, page); +} + +static inline void rk_nfc_hw_init(struct rk_nfc *nfc) +{ + /* disable flash wp */ + writel(FMCTL_WP, nfc->regs + NFC_FMCTL); + /* config default timing */ + 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_clk *clk) +{ + int ret; + + ret = clk_prepare_enable(clk->nfc_clk); + if (ret) { + dev_err(dev, "failed to enable nfc clk\n"); + return ret; + } + + ret = clk_prepare_enable(clk->ahb_clk); + if (ret) { + dev_err(dev, "failed to enable ahb clk\n"); + clk_disable_unprepare(clk->nfc_clk); + return ret; + } + + return 0; +} + +static void rk_nfc_disable_clk(struct rk_nfc_clk *clk) +{ + clk_disable_unprepare(clk->nfc_clk); + clk_disable_unprepare(clk->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); + + if (section >= chip->ecc.steps) + return -ERANGE; + + if (!section) { + /* The first byte is bad block mask flag */ + oob_region->length = NFC_SYS_DATA_SIZE - 1; + oob_region->offset = 1; + } else { + oob_region->length = NFC_SYS_DATA_SIZE; + oob_region->offset = section * NFC_SYS_DATA_SIZE; + } + + 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); + + if (section) + return -ERANGE; + + oob_region->offset = NFC_SYS_DATA_SIZE * chip->ecc.steps; + 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_hw_ecc_setup(struct mtd_info *mtd, + struct nand_ecc_ctrl *ecc, + uint32_t strength) +{ + struct nand_chip *nand = mtd_to_nand(mtd); + struct rk_nfc *nfc = nand_get_controller_data(nand); + u32 reg, i; + + ecc->strength = strength; + ecc->steps = mtd->writesize / ecc->size; + ecc->bytes = DIV_ROUND_UP(ecc->strength * 14, 8); + /* HW ECC always work with even numbers of ECC bytes */ + ecc->bytes = ALIGN(ecc->bytes, 2); + + 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 int rk_nfc_ecc_init(struct device *dev, struct mtd_info *mtd) +{ + struct nand_chip *nand = mtd_to_nand(mtd); + struct rk_nfc *nfc = nand_get_controller_data(nand); + struct nand_ecc_ctrl *ecc = &nand->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 = nand->base.eccreq.strength; + ecc->size = nand->base.eccreq.step_size; + + /* + * align eccstrength and eccsize + * this controller only supports 512 and 1024 sizes + */ + if (nand->ecc.size < 1024) { + if (mtd->writesize > 512) { + nand->ecc.size = 1024; + nand->ecc.strength <<= 1; + } else { + dev_err(dev, "ecc.size not supported\n"); + return -EINVAL; + } + } else { + nand->ecc.size = 1024; + } + + ecc->steps = mtd->writesize / ecc->size; + max_strength = ((mtd->oobsize / ecc->steps) - 4) * 8 / 14; + 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 strength\n"); + return -ENOTSUPP; + } + + ecc->strength = strengths[i]; + } + rk_nfc_hw_ecc_setup(mtd, ecc, ecc->strength); + dev_info(dev, "eccsize %d eccstrength %d\n", + nand->ecc.size, nand->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 *rk_nand = to_rk_nand(chip); + struct nand_ecc_ctrl *ecc = &chip->ecc; + int len; + int ret; + + if (chip->options & NAND_BUSWIDTH_16) { + dev_err(dev, "16bits buswidth not supported"); + return -EINVAL; + } + + if (ecc->mode != NAND_ECC_HW) + return 0; + + ret = rk_nfc_ecc_init(dev, mtd); + if (ret) + return ret; + rk_nand->spare_per_sector = ecc->bytes + NFC_SYS_DATA_SIZE; + + /* Check buffer first, avoid duplicate alloc buffer */ + if (nfc->buffer) + return 0; + + len = mtd->writesize + mtd->oobsize; + nfc->buffer = devm_kzalloc(dev, len, GFP_KERNEL | GFP_DMA); + if (!nfc->buffer) + return -ENOMEM; + + nfc->page_buf = nfc->buffer; + len = ecc->steps * NFC_MAX_OOB_PER_STEP; + nfc->oob_buf = devm_kzalloc(dev, len, GFP_KERNEL | GFP_DMA); + if (!nfc->oob_buf) { + devm_kfree(dev, nfc->buffer); + nfc->buffer = NULL; + nfc->oob_buf = NULL; + return -ENOMEM; + } + + 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_std; + chip->ecc.write_oob = rk_nfc_write_oob_std; + + 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_std; + chip->ecc.read_oob = rk_nfc_read_oob_std; + + 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_data_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 *chip; + struct nand_chip *nand; + 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; + } + + chip = devm_kzalloc(dev, sizeof(*chip) + nsels * sizeof(u8), + GFP_KERNEL); + if (!chip) + return -ENOMEM; + + chip->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; + } + + chip->sels[i] = tmp; + } + + nand = &chip->nand; + nand->controller = &nfc->controller; + + nand_set_flash_node(nand, np); + nand_set_controller_data(nand, nfc); + + nand->options |= NAND_USE_BOUNCE_BUFFER | NAND_NO_SUBPAGE_WRITE; + nand->bbt_options = NAND_BBT_USE_FLASH | NAND_BBT_NO_OOB; + + /* set default mode in case dt entry is missing */ + nand->ecc.mode = NAND_ECC_HW; + + mtd = nand_to_mtd(nand); + mtd->owner = THIS_MODULE; + mtd->dev.parent = dev; + mtd->name = THIS_NAME; + mtd_set_ooblayout(mtd, &rk_nfc_ooblayout_ops); + rk_nfc_hw_init(nfc); + ret = nand_scan(nand, nsels); + if (ret) + return ret; + ret = mtd_device_register(mtd, NULL, 0); + if (ret) { + dev_err(dev, "mtd parse partition error\n"); + nand_release(nand); + return ret; + } + + list_add_tail(&chip->node, &nfc->chips); + + return 0; +} + +static int rk_nfc_nand_chips_init(struct device *dev, struct rk_nfc *nfc) +{ + struct device_node *np = dev->of_node; + struct device_node *nand_np; + int ret = -EINVAL; + int tmp; + + for_each_child_of_node(np, nand_np) { + tmp = rk_nfc_nand_chip_init(dev, nfc, nand_np); + if (tmp) { + of_node_put(nand_np); + return ret; + } + /* At least one nand chip is initialized */ + ret = 0; + } + + return ret; +} + +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, + .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,rk3308_nfc", + .data = &nfc_v8_cfg }, + {.compatible = "rockchip,rv1108_nfc", + .data = &nfc_v8_cfg }, + {.compatible = "rockchip,rk3066_nfc", + .data = &nfc_v6_cfg }, + {.compatible = "rockchip,rk3188_nfc", + .data = &nfc_v6_cfg }, + {.compatible = "rockchip,rk3288_nfc", + .data = &nfc_v6_cfg }, + {.compatible = "rockchip,rk3368_nfc", + .data = &nfc_v6_cfg }, + {.compatible = "rockchip,rk2928_nfc", + .data = &nfc_v6_cfg }, + {.compatible = "rockchip,rk3036_nfc", + .data = &nfc_v6_cfg }, + {.compatible = "rockchip,rk3128_nfc", + .data = &nfc_v6_cfg }, + {.compatible = "rockchip,rk3228_nfc", + .data = &nfc_v6_cfg }, + {} +}; +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; + struct resource *res; + 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; + + res = platform_get_resource(pdev, IORESOURCE_MEM, 0); + nfc->regs = devm_ioremap_resource(dev, res); + if (IS_ERR(nfc->regs)) { + ret = PTR_ERR(nfc->regs); + goto release_nfc; + } + nfc->clk.nfc_clk = devm_clk_get(dev, "nfc"); + if (IS_ERR(nfc->clk.nfc_clk)) { + dev_err(dev, "no nfc clk\n"); + ret = PTR_ERR(nfc->clk.nfc_clk); + goto release_nfc; + } + nfc->clk.ahb_clk = devm_clk_get(dev, "ahb"); + if (IS_ERR(nfc->clk.ahb_clk)) { + dev_err(dev, "no ahb clk\n"); + ret = PTR_ERR(nfc->clk.ahb_clk); + goto release_nfc; + } + + ret = rk_nfc_enable_clk(dev, &nfc->clk); + 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->clk); +release_nfc: + return ret; +} + +static int rk_nfc_remove(struct platform_device *pdev) +{ + struct rk_nfc *nfc = platform_get_drvdata(pdev); + struct rk_nfc_nand_chip *chip; + + while (!list_empty(&nfc->chips)) { + chip = list_first_entry(&nfc->chips, struct rk_nfc_nand_chip, + node); + nand_release(&chip->nand); + list_del(&chip->node); + } + + rk_nfc_disable_clk(&nfc->clk); + + 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->clk); + + 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 *chip; + struct nand_chip *nand; + int ret; + u32 i; + + ret = rk_nfc_enable_clk(dev, &nfc->clk); + if (ret) + return ret; + + /* reset NAND chip if VCC was powered off */ + list_for_each_entry(chip, &nfc->chips, node) { + nand = &chip->nand; + for (i = 0; i < chip->nsels; i++) + nand_reset(nand, 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 = THIS_NAME, + .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"); -- 2.17.1 ______________________________________________________ Linux MTD discussion mailing list http://lists.infradead.org/mailman/listinfo/linux-mtd/