From nobody Mon Nov 25 05:38:58 2024 Received: from mx0a-0031df01.pphosted.com (mx0a-0031df01.pphosted.com [205.220.168.131]) (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 2E3151E9085; Wed, 30 Oct 2024 12:20:34 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=205.220.168.131 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1730290840; cv=none; b=i58nsvf1W7u+rGkeXZb6GhHz/N3oXLEiDWYPdAw2tuFjmx/mrpXp27gaz/Bh4P98ngjz3j3EMC2O0sfyz71WWMSi0g+YfhKJ0GNeLzR0wklUfywcrDQ0WsCzeL+rLtj6KmBLw4g2DZipSlftQHOnW+eNVF4QW7aYoD5cYbEcmlM= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1730290840; c=relaxed/simple; bh=eccqlmT5Q1giXUq3aklerAzLXoogZDG+upfavRqdyzY=; h=From:To:CC:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version:Content-Type; b=ny0TdWLIh9hpBtayyIC2akUXkRUYdimBEtEZAa9SVo+Y1AZvihcXcjJU/DNESoXW5Tsqg0IHQqZXViPy+a+CcQGh+TTT+PAtzDG9Q3DLLLNTzAym+YtMQdhf66eIVROKqzs7hLqJuS/mh6/bPz8CDwUod6cUTo4viCH8761eSuA= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=quicinc.com; spf=pass smtp.mailfrom=quicinc.com; dkim=pass (2048-bit key) header.d=quicinc.com header.i=@quicinc.com header.b=aEssDo1e; arc=none smtp.client-ip=205.220.168.131 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=quicinc.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=quicinc.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=quicinc.com header.i=@quicinc.com header.b="aEssDo1e" Received: from pps.filterd (m0279867.ppops.net [127.0.0.1]) by mx0a-0031df01.pphosted.com (8.18.1.2/8.18.1.2) with ESMTP id 49U9cqXe005279; Wed, 30 Oct 2024 12:20:17 GMT DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=quicinc.com; h= cc:content-transfer-encoding:content-type:date:from:in-reply-to :message-id:mime-version:references:subject:to; s=qcppdkim1; bh= k/DzerM408rk4P2y86ANu4BoI6mILeWirJ3anHU3Tm4=; b=aEssDo1eRpWS4lXN d7nM5MVmWnyFLFZP9uoMX6cpJHRS3yKFFRDNADRfgVGlqFby8jPwocfXb+tUWoIH Oyks+jduYFuqdSH9ieHhoiJmHsxDVeJxN8piNGnIZ5VJy9epbBsSkNM0vTLT6biE 4eVmA3g9FCu4QYMYxPa7k1eW6mrYszFlSiQW/6hDye/RgOY83UnilKOhCFCp1is7 +OHkJImwNu4XccnpvrgJdpP5BElHkTS//+OyTu4XVZ8QS+SocF5/nmtGw+GILGoz WPqw8XNWOwIspbwHV6hO4kGi1ab/Cng9gdT/E6TS6vTK1edynxCIEIqwBoblJagz LWW1Bg== Received: from nasanppmta05.qualcomm.com (i-global254.qualcomm.com [199.106.103.254]) by mx0a-0031df01.pphosted.com (PPS) with ESMTPS id 42gp4e4527-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Wed, 30 Oct 2024 12:20:16 +0000 (GMT) Received: from nasanex01a.na.qualcomm.com (nasanex01a.na.qualcomm.com [10.52.223.231]) by NASANPPMTA05.qualcomm.com (8.18.1.2/8.18.1.2) with ESMTPS id 49UCKGef015217 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Wed, 30 Oct 2024 12:20:16 GMT Received: from hu-mdalam-blr.qualcomm.com (10.80.80.8) by nasanex01a.na.qualcomm.com (10.52.223.231) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.1544.9; Wed, 30 Oct 2024 05:20:10 -0700 From: Md Sadre Alam To: , , , , , , , , , , , , , , CC: , , Subject: [PATCH v13 6/8] spi: spi-qpic: add driver for QCOM SPI NAND flash Interface Date: Wed, 30 Oct 2024 17:49:17 +0530 Message-ID: <20241030121919.865716-7-quic_mdalam@quicinc.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20241030121919.865716-1-quic_mdalam@quicinc.com> References: <20241030121919.865716-1-quic_mdalam@quicinc.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-ClientProxiedBy: nasanex01b.na.qualcomm.com (10.46.141.250) To nasanex01a.na.qualcomm.com (10.52.223.231) X-QCInternal: smtphost X-Proofpoint-Virus-Version: vendor=nai engine=6200 definitions=5800 signatures=585085 X-Proofpoint-ORIG-GUID: 0KUaeXcynKF3RTx01WSsGJQNrCGa2iLE X-Proofpoint-GUID: 0KUaeXcynKF3RTx01WSsGJQNrCGa2iLE X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1039,Hydra:6.0.680,FMLib:17.12.60.29 definitions=2024-09-06_09,2024-09-06_01,2024-09-02_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 impostorscore=0 priorityscore=1501 mlxlogscore=999 clxscore=1015 spamscore=0 lowpriorityscore=0 malwarescore=0 bulkscore=0 adultscore=0 phishscore=0 mlxscore=0 suspectscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.19.0-2409260000 definitions=main-2410300096 Content-Type: text/plain; charset="utf-8" This driver implements support for the SPI-NAND mode of QCOM NAND Flash Interface as a SPI-MEM controller with pipelined ECC capability. Co-developed-by: Sricharan Ramabadhran Signed-off-by: Sricharan Ramabadhran Co-developed-by: Varadarajan Narayanan Signed-off-by: Varadarajan Narayanan Signed-off-by: Md Sadre Alam --- Change in [v13] * Changed return type of qcom_spi_cmd_mapping() from u32 to int to fix the kernel test bot warning * Changed type of variable cmd in qcom_spi_write_page() from u32 to int * Removed unused variable s_op from qcom_spi_write_page() * Updated return value variable type from u32 to int in qcom_spi_send_cmdaddr()=20 Change in [v12] * Added obj-$(CONFIG_SPI_QPIC_SNAND) +=3D qpic_common.o in Makefile to build qpic_common.c based on CONFIG_SPI_QPIC_SNAND Change in [v11] * Fixed build error reported by kernel test bot * Changed "depends on MTD" to "select MTD" in drivers/spi/Kconfig file Change in [v10] * Fixed compilation warnings reported by kernel test robot. * Added depends on CONFIG_MTD * removed extra bracket from statement if (i =3D=3D (num_cw - 1)) in=20 qcom_spi_program_raw() api. Change in [v9] * Changed data type of addr1, addr2, cmd, to __le32 in qpic_spi_nand structure * In qcom_spi_set_read_loc_first() api added cpu_to_le32() macro to fix compilation warning * In qcom_spi_set_read_loc_last() api added cpu_to_le32() macro to fix compilation warning * In qcom_spi_init() api added cpu_to_le32() macro to fix compilation warning * In qcom_spi_ecc_init_ctx_pipelined() api removed unused variables reqs, user, step_size, strength and added cpu_to_le32() macro as well to fix compilation warning * In qcom_spi_read_last_cw() api added cpu_to_le32() macro to fix compilati= on warning * In qcom_spi_check_error() api added cpu_to_le32() macro to fix compilation warning * In qcom_spi_read_page_ecc() api added cpu_to_le32() macro to fix compilat= ion warning * In qcom_spi_read_page_oob() api added cpu_to_le32() macro to fix compilat= ion warning * In qcom_spi_program_raw() api added cpu_to_le32() macro to fix compilation warning * In qcom_spi_program_ecc() api added cpu_to_le32() macro to fix compilation warning * In qcom_spi_program_oob() api added cpu_to_le32() macro to fix compilation warning * In qcom_spi_send_cmdaddr() api added cpu_to_le32() macro to fix compilati= on warning * In qcom_spi_io_op() api added cpu_to_le32() macro to fix compilation warning Change in [v8] * Included "bitfield.h" file to /spi-qpic-snand.c to fix compilation warning reported by kernel test robot * Removed unused variable "steps" in=20 qcom_spi_ecc_init_ctx_pipelined() to fix compilation warning Change in [v7] * Added read_oob() and write_oob() api * Handled offset value for oob layout * Made CONFIG_SPI_QPIC_SNAND as bool * Added macro ecceng_to_qspi() * Added FIELD_PREP() Macro in spi init * Added else condition in=20 qcom_spi_ecc_finish_io_req_pipelined() for corrected ecc * Handled multiple error condition for api qcom_spi_cmd_mapping() * Fix typo for printing debug message =20 Change in [v6] * Added separate qpic_spi_nand{...} struct * moved qpic_ecc and qcom_ecc_stats struct to spi-qpic-snand.c file, since its spi nand specific * Added FIELD_PREP() and GENMASK() macro * Removed rawnand.h and partition.h from=20 spi-qpic-snand.c * Removed oob_buff assignment form qcom_spi_write_page_cache * Added qcom_nand_unalloc() in remove() path * Fixes all all comments Change in [v5] * Added raw_read() and raw_write() api * Updated commit message * Removed register indirection * Added qcom_spi_ prefix to all the api * Removed snand_set_reg() api. * Fixed nandbiterr issue * Removed hardcoded num_cw and made it variable * Removed hardcoded value for mtd pagesize * Added -ENOSUPPORT in cmd mapping for unsupported commands * Replace if..else with switch..case statement Change in [v4] * No change Change in [v3] * Set SPI_QPIC_SNAND to n and added COMPILE_TEST in Kconfig * Made driver name sorted in Make file * Made comment like c++ * Changed macro to functions, snandc_set_read_loc_last() and snandc_set_read_loc_first() * Added error handling in snandc_set_reg() * Changed into normal conditional statement for return snandc->ecc_stats.failed ? -EBADMSG : snandc->ecc_stats.bitflips; * Remove cast of wbuf in qpic_snand_program_execute() function * Made num_cw variable instead hardcoded value * changed if..else condition of function qpic_snand_io_op() to switch..case statement * Added __devm_spi_alloc_controller() api instead of devm_spi_alloc_master() * Disabling clock in remove path Change in [v2] * Added initial support for SPI-NAND driver Change in [v1] * Added RFC patch for design review drivers/mtd/nand/Makefile | 4 + drivers/spi/Kconfig | 9 + drivers/spi/Makefile | 1 + drivers/spi/spi-qpic-snand.c | 1633 ++++++++++++++++++++++++++ include/linux/mtd/nand-qpic-common.h | 7 + 5 files changed, 1654 insertions(+) create mode 100644 drivers/spi/spi-qpic-snand.c diff --git a/drivers/mtd/nand/Makefile b/drivers/mtd/nand/Makefile index da1586a36574..db516a45f0c5 100644 --- a/drivers/mtd/nand/Makefile +++ b/drivers/mtd/nand/Makefile @@ -3,7 +3,11 @@ nandcore-objs :=3D core.o bbt.o obj-$(CONFIG_MTD_NAND_CORE) +=3D nandcore.o obj-$(CONFIG_MTD_NAND_ECC_MEDIATEK) +=3D ecc-mtk.o +ifeq ($(CONFIG_SPI_QPIC_SNAND),y) +obj-$(CONFIG_SPI_QPIC_SNAND) +=3D qpic_common.o +else obj-$(CONFIG_MTD_NAND_QCOM) +=3D qpic_common.o +endif obj-y +=3D onenand/ obj-y +=3D raw/ obj-y +=3D spi/ diff --git a/drivers/spi/Kconfig b/drivers/spi/Kconfig index 7133bb72d1c8..3fb151371996 100644 --- a/drivers/spi/Kconfig +++ b/drivers/spi/Kconfig @@ -909,6 +909,15 @@ config SPI_QCOM_QSPI help QSPI(Quad SPI) driver for Qualcomm QSPI controller. =20 +config SPI_QPIC_SNAND + bool "QPIC SNAND controller" + depends on ARCH_QCOM || COMPILE_TEST + select MTD + help + QPIC_SNAND (QPIC SPI NAND) driver for Qualcomm QPIC controller. + QPIC controller supports both parallel nand and serial nand. + This config will enable serial nand driver for QPIC controller. + config SPI_QUP tristate "Qualcomm SPI controller with QUP interface" depends on ARCH_QCOM || COMPILE_TEST diff --git a/drivers/spi/Makefile b/drivers/spi/Makefile index 9a3338236645..0e323385adf3 100644 --- a/drivers/spi/Makefile +++ b/drivers/spi/Makefile @@ -114,6 +114,7 @@ obj-$(CONFIG_SPI_PXA2XX) +=3D spi-pxa2xx-platform.o obj-$(CONFIG_SPI_PXA2XX_PCI) +=3D spi-pxa2xx-pci.o obj-$(CONFIG_SPI_QCOM_GENI) +=3D spi-geni-qcom.o obj-$(CONFIG_SPI_QCOM_QSPI) +=3D spi-qcom-qspi.o +obj-$(CONFIG_SPI_QPIC_SNAND) +=3D spi-qpic-snand.o obj-$(CONFIG_SPI_QUP) +=3D spi-qup.o obj-$(CONFIG_SPI_ROCKCHIP) +=3D spi-rockchip.o obj-$(CONFIG_SPI_ROCKCHIP_SFC) +=3D spi-rockchip-sfc.o diff --git a/drivers/spi/spi-qpic-snand.c b/drivers/spi/spi-qpic-snand.c new file mode 100644 index 000000000000..1ba562a9369e --- /dev/null +++ b/drivers/spi/spi-qpic-snand.c @@ -0,0 +1,1633 @@ +/* + * SPDX-License-Identifier: GPL-2.0 + * + * Copyright (c) 2023, Qualcomm Innovation Center, Inc. All rights reserve= d. + * + * Authors: + * Md Sadre Alam + * Sricharan R + * Varadarajan Narayanan + */ +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#define NAND_FLASH_SPI_CFG 0xc0 +#define NAND_NUM_ADDR_CYCLES 0xc4 +#define NAND_BUSY_CHECK_WAIT_CNT 0xc8 +#define NAND_FLASH_FEATURES 0xf64 + +/* QSPI NAND config reg bits */ +#define LOAD_CLK_CNTR_INIT_EN BIT(28) +#define CLK_CNTR_INIT_VAL_VEC 0x924 +#define CLK_CNTR_INIT_VAL_VEC_MASK GENMASK(27, 16) +#define FEA_STATUS_DEV_ADDR 0xc0 +#define FEA_STATUS_DEV_ADDR_MASK GENMASK(15, 8) +#define SPI_CFG BIT(0) +#define SPI_NUM_ADDR 0xDA4DB +#define SPI_WAIT_CNT 0x10 +#define QPIC_QSPI_NUM_CS 1 +#define SPI_TRANSFER_MODE_x1 BIT(29) +#define SPI_TRANSFER_MODE_x4 (3 << 29) +#define SPI_WP BIT(28) +#define SPI_HOLD BIT(27) +#define QPIC_SET_FEATURE BIT(31) + +#define SPINAND_RESET 0xff +#define SPINAND_READID 0x9f +#define SPINAND_GET_FEATURE 0x0f +#define SPINAND_SET_FEATURE 0x1f +#define SPINAND_READ 0x13 +#define SPINAND_ERASE 0xd8 +#define SPINAND_WRITE_EN 0x06 +#define SPINAND_PROGRAM_EXECUTE 0x10 +#define SPINAND_PROGRAM_LOAD 0x84 + +#define ACC_FEATURE 0xe +#define BAD_BLOCK_MARKER_SIZE 0x2 +#define OOB_BUF_SIZE 128 +#define ecceng_to_qspi(eng) container_of(eng, struct qpic_spi_nand, ecc_e= ng) +struct qpic_snand_op { + u32 cmd_reg; + u32 addr1_reg; + u32 addr2_reg; +}; + +struct snandc_read_status { + __le32 snandc_flash; + __le32 snandc_buffer; + __le32 snandc_erased_cw; +}; + +/* + * ECC state struct + * @corrected: ECC corrected + * @bitflips: Max bit flip + * @failed: ECC failed + */ +struct qcom_ecc_stats { + u32 corrected; + u32 bitflips; + u32 failed; +}; + +struct qpic_ecc { + struct device *dev; + int ecc_bytes_hw; + int spare_bytes; + int bbm_size; + int ecc_mode; + int bytes; + int steps; + int step_size; + int strength; + int cw_size; + int cw_data; + u32 cfg0; + u32 cfg1; + u32 cfg0_raw; + u32 cfg1_raw; + u32 ecc_buf_cfg; + u32 ecc_bch_cfg; + u32 clrflashstatus; + u32 clrreadstatus; + bool bch_enabled; +}; + +struct qpic_spi_nand { + struct qcom_nand_controller *snandc; + struct spi_controller *ctlr; + struct mtd_info *mtd; + struct clk *iomacro_clk; + struct qpic_ecc *ecc; + struct qcom_ecc_stats ecc_stats; + struct nand_ecc_engine ecc_eng; + u8 *data_buf; + u8 *oob_buf; + u32 wlen; + __le32 addr1; + __le32 addr2; + __le32 cmd; + u32 num_cw; + bool oob_rw; + bool page_rw; + bool raw_rw; +}; + +static void qcom_spi_set_read_loc_first(struct qcom_nand_controller *snand= c, + int reg, int cw_offset, int read_size, + int is_last_read_loc) +{ + __le32 locreg_val; + u32 val =3D (((cw_offset) << READ_LOCATION_OFFSET) | + ((read_size) << READ_LOCATION_SIZE) | ((is_last_read_loc) + << READ_LOCATION_LAST)); + + locreg_val =3D cpu_to_le32(val); + + if (reg =3D=3D NAND_READ_LOCATION_0) + snandc->regs->read_location0 =3D locreg_val; + else if (reg =3D=3D NAND_READ_LOCATION_1) + snandc->regs->read_location1 =3D locreg_val; + else if (reg =3D=3D NAND_READ_LOCATION_2) + snandc->regs->read_location1 =3D locreg_val; + else if (reg =3D=3D NAND_READ_LOCATION_3) + snandc->regs->read_location3 =3D locreg_val; +} + +static void qcom_spi_set_read_loc_last(struct qcom_nand_controller *snandc, + int reg, int cw_offset, int read_size, + int is_last_read_loc) +{ + __le32 locreg_val; + u32 val =3D (((cw_offset) << READ_LOCATION_OFFSET) | + ((read_size) << READ_LOCATION_SIZE) | ((is_last_read_loc) + << READ_LOCATION_LAST)); + + locreg_val =3D cpu_to_le32(val); + + if (reg =3D=3D NAND_READ_LOCATION_LAST_CW_0) + snandc->regs->read_location_last0 =3D locreg_val; + else if (reg =3D=3D NAND_READ_LOCATION_LAST_CW_1) + snandc->regs->read_location_last1 =3D locreg_val; + else if (reg =3D=3D NAND_READ_LOCATION_LAST_CW_2) + snandc->regs->read_location_last2 =3D locreg_val; + else if (reg =3D=3D NAND_READ_LOCATION_LAST_CW_3) + snandc->regs->read_location_last3 =3D locreg_val; +} + +static struct qcom_nand_controller *nand_to_qcom_snand(struct nand_device = *nand) +{ + struct nand_ecc_engine *eng =3D nand->ecc.engine; + struct qpic_spi_nand *qspi =3D ecceng_to_qspi(eng); + + return qspi->snandc; +} + +static int qcom_spi_init(struct qcom_nand_controller *snandc) +{ + u32 snand_cfg_val =3D 0x0; + int ret; + + snand_cfg_val =3D FIELD_PREP(CLK_CNTR_INIT_VAL_VEC_MASK, CLK_CNTR_INIT_VA= L_VEC) | + FIELD_PREP(LOAD_CLK_CNTR_INIT_EN, 0) | + FIELD_PREP(FEA_STATUS_DEV_ADDR_MASK, FEA_STATUS_DEV_ADDR) | + FIELD_PREP(SPI_CFG, 0); + + snandc->regs->spi_cfg =3D cpu_to_le32(snand_cfg_val); + snandc->regs->num_addr_cycle =3D cpu_to_le32(SPI_NUM_ADDR); + snandc->regs->busy_wait_cnt =3D cpu_to_le32(SPI_WAIT_CNT); + + qcom_write_reg_dma(snandc, &snandc->regs->spi_cfg, NAND_FLASH_SPI_CFG, 1,= 0); + + snand_cfg_val &=3D ~LOAD_CLK_CNTR_INIT_EN; + snandc->regs->spi_cfg =3D cpu_to_le32(snand_cfg_val); + + qcom_write_reg_dma(snandc, &snandc->regs->spi_cfg, NAND_FLASH_SPI_CFG, 1,= 0); + + qcom_write_reg_dma(snandc, &snandc->regs->num_addr_cycle, NAND_NUM_ADDR_C= YCLES, 1, 0); + qcom_write_reg_dma(snandc, &snandc->regs->busy_wait_cnt, NAND_BUSY_CHECK_= WAIT_CNT, 1, + NAND_BAM_NEXT_SGL); + + ret =3D qcom_submit_descs(snandc); + if (ret) { + dev_err(snandc->dev, "failure in submitting spi init descriptor\n"); + return ret; + } + + return ret; +} + +static int qcom_spi_ooblayout_ecc(struct mtd_info *mtd, int section, + struct mtd_oob_region *oobregion) +{ + struct nand_device *nand =3D mtd_to_nanddev(mtd); + struct qcom_nand_controller *snandc =3D nand_to_qcom_snand(nand); + struct qpic_ecc *qecc =3D snandc->qspi->ecc; + + if (section > 1) + return -ERANGE; + + oobregion->length =3D qecc->ecc_bytes_hw + qecc->spare_bytes; + oobregion->offset =3D mtd->oobsize - oobregion->length; + + return 0; +} + +static int qcom_spi_ooblayout_free(struct mtd_info *mtd, int section, + struct mtd_oob_region *oobregion) +{ + struct nand_device *nand =3D mtd_to_nanddev(mtd); + struct qcom_nand_controller *snandc =3D nand_to_qcom_snand(nand); + struct qpic_ecc *qecc =3D snandc->qspi->ecc; + + if (section) + return -ERANGE; + + oobregion->length =3D qecc->steps * 4; + oobregion->offset =3D ((qecc->steps - 1) * qecc->bytes) + qecc->bbm_size; + + return 0; +} + +static const struct mtd_ooblayout_ops qcom_spi_ooblayout =3D { + .ecc =3D qcom_spi_ooblayout_ecc, + .free =3D qcom_spi_ooblayout_free, +}; + +static int qcom_spi_ecc_init_ctx_pipelined(struct nand_device *nand) +{ + struct qcom_nand_controller *snandc =3D nand_to_qcom_snand(nand); + struct nand_ecc_props *conf =3D &nand->ecc.ctx.conf; + struct mtd_info *mtd =3D nanddev_to_mtd(nand); + int cwperpage, bad_block_byte; + struct qpic_ecc *ecc_cfg; + + cwperpage =3D mtd->writesize / NANDC_STEP_SIZE; + snandc->qspi->num_cw =3D cwperpage; + + ecc_cfg =3D kzalloc(sizeof(*ecc_cfg), GFP_KERNEL); + if (!ecc_cfg) + return -ENOMEM; + snandc->qspi->oob_buf =3D kzalloc(mtd->writesize + mtd->oobsize, + GFP_KERNEL); + if (!snandc->qspi->oob_buf) + return -ENOMEM; + + memset(snandc->qspi->oob_buf, 0xff, mtd->writesize + mtd->oobsize); + + nand->ecc.ctx.priv =3D ecc_cfg; + snandc->qspi->mtd =3D mtd; + + ecc_cfg->ecc_bytes_hw =3D 7; + ecc_cfg->spare_bytes =3D 4; + ecc_cfg->bbm_size =3D 1; + ecc_cfg->bch_enabled =3D true; + ecc_cfg->bytes =3D ecc_cfg->ecc_bytes_hw + ecc_cfg->spare_bytes + ecc_cfg= ->bbm_size; + + ecc_cfg->steps =3D 4; + ecc_cfg->strength =3D 4; + ecc_cfg->step_size =3D 512; + ecc_cfg->cw_data =3D 516; + ecc_cfg->cw_size =3D ecc_cfg->cw_data + ecc_cfg->bytes; + bad_block_byte =3D mtd->writesize - ecc_cfg->cw_size * (cwperpage - 1) + = 1; + + mtd_set_ooblayout(mtd, &qcom_spi_ooblayout); + + ecc_cfg->cfg0 =3D FIELD_PREP(CW_PER_PAGE_MASK, (cwperpage - 1)) | + FIELD_PREP(UD_SIZE_BYTES_MASK, ecc_cfg->cw_data) | + FIELD_PREP(DISABLE_STATUS_AFTER_WRITE, 1) | + FIELD_PREP(NUM_ADDR_CYCLES_MASK, 3) | + FIELD_PREP(ECC_PARITY_SIZE_BYTES_RS, ecc_cfg->ecc_bytes_hw) | + FIELD_PREP(STATUS_BFR_READ, 0) | + FIELD_PREP(SET_RD_MODE_AFTER_STATUS, 1) | + FIELD_PREP(SPARE_SIZE_BYTES_MASK, ecc_cfg->spare_bytes); + + ecc_cfg->cfg1 =3D FIELD_PREP(NAND_RECOVERY_CYCLES_MASK, 0) | + FIELD_PREP(CS_ACTIVE_BSY, 0) | + FIELD_PREP(BAD_BLOCK_BYTE_NUM_MASK, bad_block_byte) | + FIELD_PREP(BAD_BLOCK_IN_SPARE_AREA, 0) | + FIELD_PREP(WR_RD_BSY_GAP_MASK, 20) | + FIELD_PREP(WIDE_FLASH, 0) | + FIELD_PREP(ENABLE_BCH_ECC, ecc_cfg->bch_enabled); + + ecc_cfg->cfg0_raw =3D FIELD_PREP(CW_PER_PAGE_MASK, (cwperpage - 1)) | + FIELD_PREP(NUM_ADDR_CYCLES_MASK, 3) | + FIELD_PREP(UD_SIZE_BYTES_MASK, ecc_cfg->cw_size) | + FIELD_PREP(SPARE_SIZE_BYTES_MASK, 0); + + ecc_cfg->cfg1_raw =3D FIELD_PREP(NAND_RECOVERY_CYCLES_MASK, 0) | + FIELD_PREP(CS_ACTIVE_BSY, 0) | + FIELD_PREP(BAD_BLOCK_BYTE_NUM_MASK, 17) | + FIELD_PREP(BAD_BLOCK_IN_SPARE_AREA, 1) | + FIELD_PREP(WR_RD_BSY_GAP_MASK, 20) | + FIELD_PREP(WIDE_FLASH, 0) | + FIELD_PREP(DEV0_CFG1_ECC_DISABLE, 1); + + ecc_cfg->ecc_bch_cfg =3D FIELD_PREP(ECC_CFG_ECC_DISABLE, !ecc_cfg->bch_en= abled) | + FIELD_PREP(ECC_SW_RESET, 0) | + FIELD_PREP(ECC_NUM_DATA_BYTES_MASK, ecc_cfg->cw_data) | + FIELD_PREP(ECC_FORCE_CLK_OPEN, 1) | + FIELD_PREP(ECC_MODE_MASK, 0) | + FIELD_PREP(ECC_PARITY_SIZE_BYTES_BCH_MASK, ecc_cfg->ecc_bytes_hw= ); + + ecc_cfg->ecc_buf_cfg =3D 0x203 << NUM_STEPS; + ecc_cfg->clrflashstatus =3D FS_READY_BSY_N; + ecc_cfg->clrreadstatus =3D 0xc0; + + conf->step_size =3D ecc_cfg->step_size; + conf->strength =3D ecc_cfg->strength; + + snandc->regs->erased_cw_detect_cfg_clr =3D cpu_to_le32(CLR_ERASED_PAGE_DE= T); + snandc->regs->erased_cw_detect_cfg_set =3D cpu_to_le32(SET_ERASED_PAGE_DE= T); + + dev_dbg(snandc->dev, "ECC strength: %u bits per %u bytes\n", + ecc_cfg->strength, ecc_cfg->step_size); + + return 0; +} + +static void qcom_spi_ecc_cleanup_ctx_pipelined(struct nand_device *nand) +{ + struct qpic_ecc *ecc_cfg =3D nand_to_ecc_ctx(nand); + + kfree(ecc_cfg); +} + +static int qcom_spi_ecc_prepare_io_req_pipelined(struct nand_device *nand, + struct nand_page_io_req *req) +{ + struct qcom_nand_controller *snandc =3D nand_to_qcom_snand(nand); + struct qpic_ecc *ecc_cfg =3D nand_to_ecc_ctx(nand); + + snandc->qspi->ecc =3D ecc_cfg; + snandc->qspi->raw_rw =3D false; + snandc->qspi->oob_rw =3D false; + snandc->qspi->page_rw =3D false; + + if (req->datalen) + snandc->qspi->page_rw =3D true; + + if (req->ooblen) + snandc->qspi->oob_rw =3D true; + + if (req->mode =3D=3D MTD_OPS_RAW) + snandc->qspi->raw_rw =3D true; + + return 0; +} + +static int qcom_spi_ecc_finish_io_req_pipelined(struct nand_device *nand, + struct nand_page_io_req *req) +{ + struct qcom_nand_controller *snandc =3D nand_to_qcom_snand(nand); + struct mtd_info *mtd =3D nanddev_to_mtd(nand); + + if (req->mode =3D=3D MTD_OPS_RAW || req->type !=3D NAND_PAGE_READ) + return 0; + + if (snandc->qspi->ecc_stats.failed) + mtd->ecc_stats.failed +=3D snandc->qspi->ecc_stats.failed; + else + mtd->ecc_stats.corrected +=3D snandc->qspi->ecc_stats.corrected; + + if (snandc->qspi->ecc_stats.failed) + return -EBADMSG; + else + return snandc->qspi->ecc_stats.bitflips; +} + +static struct nand_ecc_engine_ops qcom_spi_ecc_engine_ops_pipelined =3D { + .init_ctx =3D qcom_spi_ecc_init_ctx_pipelined, + .cleanup_ctx =3D qcom_spi_ecc_cleanup_ctx_pipelined, + .prepare_io_req =3D qcom_spi_ecc_prepare_io_req_pipelined, + .finish_io_req =3D qcom_spi_ecc_finish_io_req_pipelined, +}; + +/* helper to configure location register values */ +static void qcom_spi_set_read_loc(struct qcom_nand_controller *snandc, int= cw, int reg, + int cw_offset, int read_size, int is_last_read_loc) +{ + int reg_base =3D NAND_READ_LOCATION_0; + int num_cw =3D snandc->qspi->num_cw; + + if (cw =3D=3D (num_cw - 1)) + reg_base =3D NAND_READ_LOCATION_LAST_CW_0; + + reg_base +=3D reg * 4; + + if (cw =3D=3D (num_cw - 1)) + return qcom_spi_set_read_loc_last(snandc, reg_base, cw_offset, + read_size, is_last_read_loc); + else + return qcom_spi_set_read_loc_first(snandc, reg_base, cw_offset, + read_size, is_last_read_loc); +} + +static void +qcom_spi_config_cw_read(struct qcom_nand_controller *snandc, bool use_ecc,= int cw) +{ + __le32 *reg =3D &snandc->regs->read_location0; + int num_cw =3D snandc->qspi->num_cw; + + qcom_write_reg_dma(snandc, reg, NAND_READ_LOCATION_0, 4, NAND_BAM_NEXT_SG= L); + if (cw =3D=3D (num_cw - 1)) { + reg =3D &snandc->regs->read_location_last0; + qcom_write_reg_dma(snandc, reg, NAND_READ_LOCATION_LAST_CW_0, 4, + NAND_BAM_NEXT_SGL); + } + + qcom_write_reg_dma(snandc, &snandc->regs->cmd, NAND_FLASH_CMD, 1, NAND_BA= M_NEXT_SGL); + qcom_write_reg_dma(snandc, &snandc->regs->exec, NAND_EXEC_CMD, 1, NAND_BA= M_NEXT_SGL); + + qcom_read_reg_dma(snandc, NAND_FLASH_STATUS, 2, 0); + qcom_read_reg_dma(snandc, NAND_ERASED_CW_DETECT_STATUS, 1, + NAND_BAM_NEXT_SGL); +} + +static int qcom_spi_block_erase(struct qcom_nand_controller *snandc) +{ + struct qpic_ecc *ecc_cfg =3D snandc->qspi->ecc; + int ret; + + snandc->buf_count =3D 0; + snandc->buf_start =3D 0; + qcom_clear_read_regs(snandc); + qcom_clear_bam_transaction(snandc); + + snandc->regs->cmd =3D snandc->qspi->cmd; + snandc->regs->addr0 =3D snandc->qspi->addr1; + snandc->regs->addr1 =3D snandc->qspi->addr2; + snandc->regs->cfg0 =3D cpu_to_le32(ecc_cfg->cfg0_raw & ~(7 << CW_PER_PAGE= )); + snandc->regs->cfg1 =3D cpu_to_le32(ecc_cfg->cfg1_raw); + snandc->regs->exec =3D cpu_to_le32(1); + + qcom_write_reg_dma(snandc, &snandc->regs->cmd, NAND_FLASH_CMD, 3, NAND_BA= M_NEXT_SGL); + qcom_write_reg_dma(snandc, &snandc->regs->cfg0, NAND_DEV0_CFG0, 2, NAND_B= AM_NEXT_SGL); + qcom_write_reg_dma(snandc, &snandc->regs->exec, NAND_EXEC_CMD, 1, NAND_BA= M_NEXT_SGL); + + ret =3D qcom_submit_descs(snandc); + if (ret) { + dev_err(snandc->dev, "failure to erase block\n"); + return ret; + } + + return 0; +} + +static void qcom_spi_config_single_cw_page_read(struct qcom_nand_controlle= r *snandc, + bool use_ecc, int cw) +{ + __le32 *reg =3D &snandc->regs->read_location0; + int num_cw =3D snandc->qspi->num_cw; + + qcom_write_reg_dma(snandc, &snandc->regs->addr0, NAND_ADDR0, 2, 0); + qcom_write_reg_dma(snandc, &snandc->regs->cfg0, NAND_DEV0_CFG0, 3, 0); + qcom_write_reg_dma(snandc, &snandc->regs->erased_cw_detect_cfg_clr, + NAND_ERASED_CW_DETECT_CFG, 1, 0); + qcom_write_reg_dma(snandc, &snandc->regs->erased_cw_detect_cfg_set, + NAND_ERASED_CW_DETECT_CFG, 1, + NAND_ERASED_CW_SET | NAND_BAM_NEXT_SGL); + + if (cw =3D=3D (num_cw - 1)) { + reg =3D &snandc->regs->read_location_last0; + qcom_write_reg_dma(snandc, reg, NAND_READ_LOCATION_LAST_CW_0, 4, NAND_BA= M_NEXT_SGL); + } + qcom_write_reg_dma(snandc, &snandc->regs->cmd, NAND_FLASH_CMD, 1, NAND_BA= M_NEXT_SGL); + qcom_write_reg_dma(snandc, &snandc->regs->exec, NAND_EXEC_CMD, 1, NAND_BA= M_NEXT_SGL); + + qcom_read_reg_dma(snandc, NAND_FLASH_STATUS, 1, 0); +} + +static int qcom_spi_read_last_cw(struct qcom_nand_controller *snandc, + const struct spi_mem_op *op) +{ + struct qpic_ecc *ecc_cfg =3D snandc->qspi->ecc; + struct mtd_info *mtd =3D snandc->qspi->mtd; + int size, ret =3D 0; + int col, bbpos; + u32 cfg0, cfg1, ecc_bch_cfg; + u32 num_cw =3D snandc->qspi->num_cw; + + qcom_clear_bam_transaction(snandc); + qcom_clear_read_regs(snandc); + + size =3D ecc_cfg->cw_size; + col =3D ecc_cfg->cw_size * (num_cw - 1); + + memset(snandc->data_buffer, 0xff, size); + snandc->regs->addr0 =3D (snandc->qspi->addr1 | cpu_to_le32(col)); + snandc->regs->addr1 =3D snandc->qspi->addr2; + + cfg0 =3D (ecc_cfg->cfg0_raw & ~(7U << CW_PER_PAGE)) | + 0 << CW_PER_PAGE; + cfg1 =3D ecc_cfg->cfg1_raw; + ecc_bch_cfg =3D 1 << ECC_CFG_ECC_DISABLE; + + snandc->regs->cmd =3D snandc->qspi->cmd; + snandc->regs->cfg0 =3D cpu_to_le32(cfg0); + snandc->regs->cfg1 =3D cpu_to_le32(cfg1); + snandc->regs->ecc_bch_cfg =3D cpu_to_le32(ecc_bch_cfg); + snandc->regs->clrflashstatus =3D cpu_to_le32(ecc_cfg->clrflashstatus); + snandc->regs->clrreadstatus =3D cpu_to_le32(ecc_cfg->clrreadstatus); + snandc->regs->exec =3D cpu_to_le32(1); + + qcom_spi_set_read_loc(snandc, num_cw - 1, 0, 0, ecc_cfg->cw_size, 1); + + qcom_spi_config_single_cw_page_read(snandc, false, num_cw - 1); + + qcom_read_data_dma(snandc, FLASH_BUF_ACC, snandc->data_buffer, size, 0); + + ret =3D qcom_submit_descs(snandc); + if (ret) { + dev_err(snandc->dev, "failed to read last cw\n"); + return ret; + } + + qcom_nandc_dev_to_mem(snandc, true); + u32 flash =3D le32_to_cpu(snandc->reg_read_buf[0]); + + if (flash & (FS_OP_ERR | FS_MPU_ERR)) + return -EIO; + + bbpos =3D mtd->writesize - ecc_cfg->cw_size * (num_cw - 1); + + if (snandc->data_buffer[bbpos] =3D=3D 0xff) + snandc->data_buffer[bbpos + 1] =3D 0xff; + if (snandc->data_buffer[bbpos] !=3D 0xff) + snandc->data_buffer[bbpos + 1] =3D snandc->data_buffer[bbpos]; + + memcpy(op->data.buf.in, snandc->data_buffer + bbpos, op->data.nbytes); + + return ret; +} + +static int qcom_spi_check_error(struct qcom_nand_controller *snandc, u8 *d= ata_buf, u8 *oob_buf) +{ + struct snandc_read_status *buf; + struct qpic_ecc *ecc_cfg =3D snandc->qspi->ecc; + int i, num_cw =3D snandc->qspi->num_cw; + bool flash_op_err =3D false, erased; + unsigned int max_bitflips =3D 0; + unsigned int uncorrectable_cws =3D 0; + + snandc->qspi->ecc_stats.failed =3D 0; + snandc->qspi->ecc_stats.corrected =3D 0; + + qcom_nandc_dev_to_mem(snandc, true); + buf =3D (struct snandc_read_status *)snandc->reg_read_buf; + + for (i =3D 0; i < num_cw; i++, buf++) { + u32 flash, buffer, erased_cw; + int data_len, oob_len; + + if (i =3D=3D (num_cw - 1)) { + data_len =3D NANDC_STEP_SIZE - ((num_cw - 1) << 2); + oob_len =3D num_cw << 2; + } else { + data_len =3D ecc_cfg->cw_data; + oob_len =3D 0; + } + + flash =3D le32_to_cpu(buf->snandc_flash); + buffer =3D le32_to_cpu(buf->snandc_buffer); + erased_cw =3D le32_to_cpu(buf->snandc_erased_cw); + + if ((flash & FS_OP_ERR) && (buffer & BS_UNCORRECTABLE_BIT)) { + if (ecc_cfg->bch_enabled) + erased =3D (erased_cw & ERASED_CW) =3D=3D ERASED_CW; + else + erased =3D false; + + if (!erased) + uncorrectable_cws |=3D BIT(i); + + } else if (flash & (FS_OP_ERR | FS_MPU_ERR)) { + flash_op_err =3D true; + } else { + unsigned int stat; + + stat =3D buffer & BS_CORRECTABLE_ERR_MSK; + snandc->qspi->ecc_stats.corrected +=3D stat; + max_bitflips =3D max(max_bitflips, stat); + } + + if (data_buf) + data_buf +=3D data_len; + if (oob_buf) + oob_buf +=3D oob_len + ecc_cfg->bytes; + } + + if (flash_op_err) + return -EIO; + + if (!uncorrectable_cws) + snandc->qspi->ecc_stats.bitflips =3D max_bitflips; + else + snandc->qspi->ecc_stats.failed++; + + return 0; +} + +static int qcom_spi_check_raw_flash_errors(struct qcom_nand_controller *sn= andc, int cw_cnt) +{ + int i; + + qcom_nandc_dev_to_mem(snandc, true); + + for (i =3D 0; i < cw_cnt; i++) { + u32 flash =3D le32_to_cpu(snandc->reg_read_buf[i]); + + if (flash & (FS_OP_ERR | FS_MPU_ERR)) + return -EIO; + } + + return 0; +} + +static int qcom_spi_read_cw_raw(struct qcom_nand_controller *snandc, u8 *d= ata_buf, + u8 *oob_buf, int cw) +{ + struct qpic_ecc *ecc_cfg =3D snandc->qspi->ecc; + struct mtd_info *mtd =3D snandc->qspi->mtd; + int data_size1, data_size2, oob_size1, oob_size2; + int ret, reg_off =3D FLASH_BUF_ACC, read_loc =3D 0; + int raw_cw =3D cw; + u32 cfg0, cfg1, ecc_bch_cfg, num_cw =3D snandc->qspi->num_cw; + int col; + + snandc->buf_count =3D 0; + snandc->buf_start =3D 0; + qcom_clear_read_regs(snandc); + qcom_clear_bam_transaction(snandc); + raw_cw =3D num_cw - 1; + + cfg0 =3D (ecc_cfg->cfg0_raw & ~(7U << CW_PER_PAGE)) | + 0 << CW_PER_PAGE; + cfg1 =3D ecc_cfg->cfg1_raw; + ecc_bch_cfg =3D ECC_CFG_ECC_DISABLE; + + col =3D ecc_cfg->cw_size * cw; + + snandc->regs->addr0 =3D (snandc->qspi->addr1 | cpu_to_le32(col)); + snandc->regs->addr1 =3D snandc->qspi->addr2; + snandc->regs->cmd =3D snandc->qspi->cmd; + snandc->regs->cfg0 =3D cpu_to_le32(cfg0); + snandc->regs->cfg1 =3D cpu_to_le32(cfg1); + snandc->regs->ecc_bch_cfg =3D cpu_to_le32(ecc_bch_cfg); + snandc->regs->clrflashstatus =3D cpu_to_le32(ecc_cfg->clrflashstatus); + snandc->regs->clrreadstatus =3D cpu_to_le32(ecc_cfg->clrreadstatus); + snandc->regs->exec =3D cpu_to_le32(1); + + qcom_spi_set_read_loc(snandc, raw_cw, 0, 0, ecc_cfg->cw_size, 1); + + qcom_write_reg_dma(snandc, &snandc->regs->addr0, NAND_ADDR0, 2, 0); + qcom_write_reg_dma(snandc, &snandc->regs->cfg0, NAND_DEV0_CFG0, 3, 0); + qcom_write_reg_dma(snandc, &snandc->regs->ecc_buf_cfg, NAND_EBI2_ECC_BUF_= CFG, 1, 0); + + qcom_write_reg_dma(snandc, &snandc->regs->erased_cw_detect_cfg_clr, + NAND_ERASED_CW_DETECT_CFG, 1, 0); + qcom_write_reg_dma(snandc, &snandc->regs->erased_cw_detect_cfg_set, + NAND_ERASED_CW_DETECT_CFG, 1, + NAND_ERASED_CW_SET | NAND_BAM_NEXT_SGL); + + data_size1 =3D mtd->writesize - ecc_cfg->cw_size * (num_cw - 1); + oob_size1 =3D ecc_cfg->bbm_size; + + if (cw =3D=3D (num_cw - 1)) { + data_size2 =3D NANDC_STEP_SIZE - data_size1 - + ((num_cw - 1) * 4); + oob_size2 =3D (num_cw * 4) + ecc_cfg->ecc_bytes_hw + + ecc_cfg->spare_bytes; + } else { + data_size2 =3D ecc_cfg->cw_data - data_size1; + oob_size2 =3D ecc_cfg->ecc_bytes_hw + ecc_cfg->spare_bytes; + } + + qcom_spi_set_read_loc(snandc, cw, 0, read_loc, data_size1, 0); + read_loc +=3D data_size1; + + qcom_spi_set_read_loc(snandc, cw, 1, read_loc, oob_size1, 0); + read_loc +=3D oob_size1; + + qcom_spi_set_read_loc(snandc, cw, 2, read_loc, data_size2, 0); + read_loc +=3D data_size2; + + qcom_spi_set_read_loc(snandc, cw, 3, read_loc, oob_size2, 1); + + qcom_spi_config_cw_read(snandc, false, raw_cw); + + qcom_read_data_dma(snandc, reg_off, data_buf, data_size1, 0); + reg_off +=3D data_size1; + + qcom_read_data_dma(snandc, reg_off, oob_buf, oob_size1, 0); + reg_off +=3D oob_size1; + + qcom_read_data_dma(snandc, reg_off, data_buf + data_size1, data_size2, 0); + reg_off +=3D data_size2; + + qcom_read_data_dma(snandc, reg_off, oob_buf + oob_size1, oob_size2, 0); + + ret =3D qcom_submit_descs(snandc); + if (ret) { + dev_err(snandc->dev, "failure to read raw cw %d\n", cw); + return ret; + } + + return qcom_spi_check_raw_flash_errors(snandc, 1); +} + +static int qcom_spi_read_page_raw(struct qcom_nand_controller *snandc, + const struct spi_mem_op *op) +{ + struct qpic_ecc *ecc_cfg =3D snandc->qspi->ecc; + u8 *data_buf =3D NULL, *oob_buf =3D NULL; + int ret, cw; + u32 num_cw =3D snandc->qspi->num_cw; + + if (snandc->qspi->page_rw) + data_buf =3D op->data.buf.in; + + oob_buf =3D snandc->qspi->oob_buf; + memset(oob_buf, 0xff, OOB_BUF_SIZE); + + for (cw =3D 0; cw < num_cw; cw++) { + ret =3D qcom_spi_read_cw_raw(snandc, data_buf, oob_buf, cw); + if (ret) + return ret; + + if (data_buf) + data_buf +=3D ecc_cfg->cw_data; + if (oob_buf) + oob_buf +=3D ecc_cfg->bytes; + } + + return 0; +} + +static int qcom_spi_read_page_ecc(struct qcom_nand_controller *snandc, + const struct spi_mem_op *op) +{ + struct qpic_ecc *ecc_cfg =3D snandc->qspi->ecc; + u8 *data_buf =3D NULL, *data_buf_start, *oob_buf =3D NULL, *oob_buf_start; + int ret, i; + u32 cfg0, cfg1, ecc_bch_cfg, num_cw =3D snandc->qspi->num_cw; + + data_buf =3D op->data.buf.in; + data_buf_start =3D data_buf; + + oob_buf =3D snandc->qspi->oob_buf; + oob_buf_start =3D oob_buf; + + snandc->buf_count =3D 0; + snandc->buf_start =3D 0; + qcom_clear_read_regs(snandc); + + cfg0 =3D (ecc_cfg->cfg0 & ~(7U << CW_PER_PAGE)) | + (num_cw - 1) << CW_PER_PAGE; + cfg1 =3D ecc_cfg->cfg1; + ecc_bch_cfg =3D ecc_cfg->ecc_bch_cfg; + + snandc->regs->addr0 =3D snandc->qspi->addr1; + snandc->regs->addr1 =3D snandc->qspi->addr2; + snandc->regs->cmd =3D snandc->qspi->cmd; + snandc->regs->cfg0 =3D cpu_to_le32(cfg0); + snandc->regs->cfg1 =3D cpu_to_le32(cfg1); + snandc->regs->ecc_bch_cfg =3D cpu_to_le32(ecc_bch_cfg); + snandc->regs->clrflashstatus =3D cpu_to_le32(ecc_cfg->clrflashstatus); + snandc->regs->clrreadstatus =3D cpu_to_le32(ecc_cfg->clrreadstatus); + snandc->regs->exec =3D cpu_to_le32(1); + + qcom_spi_set_read_loc(snandc, 0, 0, 0, ecc_cfg->cw_data, 1); + + qcom_clear_bam_transaction(snandc); + + qcom_write_reg_dma(snandc, &snandc->regs->addr0, NAND_ADDR0, 2, 0); + qcom_write_reg_dma(snandc, &snandc->regs->cfg0, NAND_DEV0_CFG0, 3, 0); + qcom_write_reg_dma(snandc, &snandc->regs->erased_cw_detect_cfg_clr, + NAND_ERASED_CW_DETECT_CFG, 1, 0); + qcom_write_reg_dma(snandc, &snandc->regs->erased_cw_detect_cfg_set, + NAND_ERASED_CW_DETECT_CFG, 1, + NAND_ERASED_CW_SET | NAND_BAM_NEXT_SGL); + + for (i =3D 0; i < num_cw; i++) { + int data_size, oob_size; + + if (i =3D=3D (num_cw - 1)) { + data_size =3D 512 - ((num_cw - 1) << 2); + oob_size =3D (num_cw << 2) + ecc_cfg->ecc_bytes_hw + + ecc_cfg->spare_bytes; + } else { + data_size =3D ecc_cfg->cw_data; + oob_size =3D ecc_cfg->ecc_bytes_hw + ecc_cfg->spare_bytes; + } + + if (data_buf && oob_buf) { + qcom_spi_set_read_loc(snandc, i, 0, 0, data_size, 0); + qcom_spi_set_read_loc(snandc, i, 1, data_size, oob_size, 1); + } else if (data_buf) { + qcom_spi_set_read_loc(snandc, i, 0, 0, data_size, 1); + } else { + qcom_spi_set_read_loc(snandc, i, 0, data_size, oob_size, 1); + } + + qcom_spi_config_cw_read(snandc, true, i); + + if (data_buf) + qcom_read_data_dma(snandc, FLASH_BUF_ACC, data_buf, + data_size, 0); + if (oob_buf) { + int j; + + for (j =3D 0; j < ecc_cfg->bbm_size; j++) + *oob_buf++ =3D 0xff; + + qcom_read_data_dma(snandc, FLASH_BUF_ACC + data_size, + oob_buf, oob_size, 0); + } + + if (data_buf) + data_buf +=3D data_size; + if (oob_buf) + oob_buf +=3D oob_size; + } + + ret =3D qcom_submit_descs(snandc); + if (ret) { + dev_err(snandc->dev, "failure to read page\n"); + return ret; + } + + return qcom_spi_check_error(snandc, data_buf_start, oob_buf_start); +} + +static int qcom_spi_read_page_oob(struct qcom_nand_controller *snandc, + const struct spi_mem_op *op) +{ + struct qpic_ecc *ecc_cfg =3D snandc->qspi->ecc; + u8 *data_buf =3D NULL, *data_buf_start, *oob_buf =3D NULL, *oob_buf_start; + int ret, i; + u32 cfg0, cfg1, ecc_bch_cfg, num_cw =3D snandc->qspi->num_cw; + + oob_buf =3D op->data.buf.in; + oob_buf_start =3D oob_buf; + + data_buf_start =3D data_buf; + + snandc->buf_count =3D 0; + snandc->buf_start =3D 0; + qcom_clear_read_regs(snandc); + qcom_clear_bam_transaction(snandc); + + cfg0 =3D (ecc_cfg->cfg0 & ~(7U << CW_PER_PAGE)) | + (num_cw - 1) << CW_PER_PAGE; + cfg1 =3D ecc_cfg->cfg1; + ecc_bch_cfg =3D ecc_cfg->ecc_bch_cfg; + + snandc->regs->addr0 =3D snandc->qspi->addr1; + snandc->regs->addr1 =3D snandc->qspi->addr2; + snandc->regs->cmd =3D snandc->qspi->cmd; + snandc->regs->cfg0 =3D cpu_to_le32(cfg0); + snandc->regs->cfg1 =3D cpu_to_le32(cfg1); + snandc->regs->ecc_bch_cfg =3D cpu_to_le32(ecc_bch_cfg); + snandc->regs->clrflashstatus =3D cpu_to_le32(ecc_cfg->clrflashstatus); + snandc->regs->clrreadstatus =3D cpu_to_le32(ecc_cfg->clrreadstatus); + snandc->regs->exec =3D cpu_to_le32(1); + + qcom_spi_set_read_loc(snandc, 0, 0, 0, ecc_cfg->cw_data, 1); + + qcom_write_reg_dma(snandc, &snandc->regs->addr0, NAND_ADDR0, 2, 0); + qcom_write_reg_dma(snandc, &snandc->regs->cfg0, NAND_DEV0_CFG0, 3, 0); + qcom_write_reg_dma(snandc, &snandc->regs->erased_cw_detect_cfg_clr, + NAND_ERASED_CW_DETECT_CFG, 1, 0); + qcom_write_reg_dma(snandc, &snandc->regs->erased_cw_detect_cfg_set, + NAND_ERASED_CW_DETECT_CFG, 1, + NAND_ERASED_CW_SET | NAND_BAM_NEXT_SGL); + + for (i =3D 0; i < num_cw; i++) { + int data_size, oob_size; + + if (i =3D=3D (num_cw - 1)) { + data_size =3D NANDC_STEP_SIZE - ((num_cw - 1) << 2); + oob_size =3D (num_cw << 2) + ecc_cfg->ecc_bytes_hw + + ecc_cfg->spare_bytes; + } else { + data_size =3D ecc_cfg->cw_data; + oob_size =3D ecc_cfg->ecc_bytes_hw + ecc_cfg->spare_bytes; + } + + qcom_spi_set_read_loc(snandc, i, 0, data_size, oob_size, 1); + + qcom_spi_config_cw_read(snandc, true, i); + + if (oob_buf) { + int j; + + for (j =3D 0; j < ecc_cfg->bbm_size; j++) + *oob_buf++ =3D 0xff; + + qcom_read_data_dma(snandc, FLASH_BUF_ACC + data_size, + oob_buf, oob_size, 0); + } + + if (oob_buf) + oob_buf +=3D oob_size; + } + + ret =3D qcom_submit_descs(snandc); + if (ret) { + dev_err(snandc->dev, "failure to read oob\n"); + return ret; + } + + return qcom_spi_check_error(snandc, data_buf_start, oob_buf_start); +} + +static int qcom_spi_read_page(struct qcom_nand_controller *snandc, + const struct spi_mem_op *op) +{ + if (snandc->qspi->page_rw && snandc->qspi->raw_rw) + return qcom_spi_read_page_raw(snandc, op); + + if (snandc->qspi->page_rw) + return qcom_spi_read_page_ecc(snandc, op); + + if (snandc->qspi->oob_rw && snandc->qspi->raw_rw) + return qcom_spi_read_last_cw(snandc, op); + + if (snandc->qspi->oob_rw) + return qcom_spi_read_page_oob(snandc, op); + + return 0; +} + +static void qcom_spi_config_page_write(struct qcom_nand_controller *snandc) +{ + qcom_write_reg_dma(snandc, &snandc->regs->addr0, NAND_ADDR0, 2, 0); + qcom_write_reg_dma(snandc, &snandc->regs->cfg0, NAND_DEV0_CFG0, 3, 0); + qcom_write_reg_dma(snandc, &snandc->regs->ecc_buf_cfg, NAND_EBI2_ECC_BUF_= CFG, + 1, NAND_BAM_NEXT_SGL); +} + +static void qcom_spi_config_cw_write(struct qcom_nand_controller *snandc) +{ + qcom_write_reg_dma(snandc, &snandc->regs->cmd, NAND_FLASH_CMD, 1, NAND_BA= M_NEXT_SGL); + qcom_write_reg_dma(snandc, &snandc->regs->exec, NAND_EXEC_CMD, 1, NAND_BA= M_NEXT_SGL); + qcom_read_reg_dma(snandc, NAND_FLASH_STATUS, 1, NAND_BAM_NEXT_SGL); + + qcom_write_reg_dma(snandc, &snandc->regs->clrflashstatus, NAND_FLASH_STAT= US, 1, 0); + qcom_write_reg_dma(snandc, &snandc->regs->clrreadstatus, NAND_READ_STATUS= , 1, + NAND_BAM_NEXT_SGL); +} + +static int qcom_spi_program_raw(struct qcom_nand_controller *snandc, + const struct spi_mem_op *op) +{ + struct qpic_ecc *ecc_cfg =3D snandc->qspi->ecc; + struct mtd_info *mtd =3D snandc->qspi->mtd; + u8 *data_buf =3D NULL, *oob_buf =3D NULL; + int i, ret; + int num_cw =3D snandc->qspi->num_cw; + u32 cfg0, cfg1, ecc_bch_cfg; + + cfg0 =3D (ecc_cfg->cfg0_raw & ~(7U << CW_PER_PAGE)) | + (num_cw - 1) << CW_PER_PAGE; + cfg1 =3D ecc_cfg->cfg1_raw; + ecc_bch_cfg =3D ECC_CFG_ECC_DISABLE; + + data_buf =3D snandc->qspi->data_buf; + + oob_buf =3D snandc->qspi->oob_buf; + memset(oob_buf, 0xff, OOB_BUF_SIZE); + + snandc->buf_count =3D 0; + snandc->buf_start =3D 0; + qcom_clear_read_regs(snandc); + qcom_clear_bam_transaction(snandc); + + snandc->regs->addr0 =3D snandc->qspi->addr1; + snandc->regs->addr1 =3D snandc->qspi->addr2; + snandc->regs->cmd =3D snandc->qspi->cmd; + snandc->regs->cfg0 =3D cpu_to_le32(cfg0); + snandc->regs->cfg1 =3D cpu_to_le32(cfg1); + snandc->regs->ecc_bch_cfg =3D cpu_to_le32(ecc_bch_cfg); + snandc->regs->clrflashstatus =3D cpu_to_le32(ecc_cfg->clrflashstatus); + snandc->regs->clrreadstatus =3D cpu_to_le32(ecc_cfg->clrreadstatus); + snandc->regs->exec =3D cpu_to_le32(1); + + qcom_spi_config_page_write(snandc); + + for (i =3D 0; i < num_cw; i++) { + int data_size1, data_size2, oob_size1, oob_size2; + int reg_off =3D FLASH_BUF_ACC; + + data_size1 =3D mtd->writesize - ecc_cfg->cw_size * (num_cw - 1); + oob_size1 =3D ecc_cfg->bbm_size; + + if (i =3D=3D (num_cw - 1)) { + data_size2 =3D NANDC_STEP_SIZE - data_size1 - + ((num_cw - 1) << 2); + oob_size2 =3D (num_cw << 2) + ecc_cfg->ecc_bytes_hw + + ecc_cfg->spare_bytes; + } else { + data_size2 =3D ecc_cfg->cw_data - data_size1; + oob_size2 =3D ecc_cfg->ecc_bytes_hw + ecc_cfg->spare_bytes; + } + + qcom_write_data_dma(snandc, reg_off, data_buf, data_size1, + NAND_BAM_NO_EOT); + reg_off +=3D data_size1; + data_buf +=3D data_size1; + + qcom_write_data_dma(snandc, reg_off, oob_buf, oob_size1, + NAND_BAM_NO_EOT); + oob_buf +=3D oob_size1; + reg_off +=3D oob_size1; + + qcom_write_data_dma(snandc, reg_off, data_buf, data_size2, + NAND_BAM_NO_EOT); + reg_off +=3D data_size2; + data_buf +=3D data_size2; + + qcom_write_data_dma(snandc, reg_off, oob_buf, oob_size2, 0); + oob_buf +=3D oob_size2; + + qcom_spi_config_cw_write(snandc); + } + + ret =3D qcom_submit_descs(snandc); + if (ret) { + dev_err(snandc->dev, "failure to write raw page\n"); + return ret; + } + + return 0; +} + +static int qcom_spi_program_ecc(struct qcom_nand_controller *snandc, + const struct spi_mem_op *op) +{ + struct qpic_ecc *ecc_cfg =3D snandc->qspi->ecc; + u8 *data_buf =3D NULL, *oob_buf =3D NULL; + int i, ret; + int num_cw =3D snandc->qspi->num_cw; + u32 cfg0, cfg1, ecc_bch_cfg, ecc_buf_cfg; + + cfg0 =3D (ecc_cfg->cfg0 & ~(7U << CW_PER_PAGE)) | + (num_cw - 1) << CW_PER_PAGE; + cfg1 =3D ecc_cfg->cfg1; + ecc_bch_cfg =3D ecc_cfg->ecc_bch_cfg; + ecc_buf_cfg =3D ecc_cfg->ecc_buf_cfg; + + if (snandc->qspi->data_buf) + data_buf =3D snandc->qspi->data_buf; + + oob_buf =3D snandc->qspi->oob_buf; + + snandc->buf_count =3D 0; + snandc->buf_start =3D 0; + qcom_clear_read_regs(snandc); + qcom_clear_bam_transaction(snandc); + + snandc->regs->addr0 =3D snandc->qspi->addr1; + snandc->regs->addr1 =3D snandc->qspi->addr2; + snandc->regs->cmd =3D snandc->qspi->cmd; + snandc->regs->cfg0 =3D cpu_to_le32(cfg0); + snandc->regs->cfg1 =3D cpu_to_le32(cfg1); + snandc->regs->ecc_bch_cfg =3D cpu_to_le32(ecc_bch_cfg); + snandc->regs->ecc_buf_cfg =3D cpu_to_le32(ecc_buf_cfg); + snandc->regs->exec =3D cpu_to_le32(1); + + qcom_spi_config_page_write(snandc); + + for (i =3D 0; i < num_cw; i++) { + int data_size, oob_size; + + if (i =3D=3D (num_cw - 1)) { + data_size =3D NANDC_STEP_SIZE - ((num_cw - 1) << 2); + oob_size =3D (num_cw << 2) + ecc_cfg->ecc_bytes_hw + + ecc_cfg->spare_bytes; + } else { + data_size =3D ecc_cfg->cw_data; + oob_size =3D ecc_cfg->bytes; + } + + if (data_buf) + qcom_write_data_dma(snandc, FLASH_BUF_ACC, data_buf, data_size, + i =3D=3D (num_cw - 1) ? NAND_BAM_NO_EOT : 0); + + if (i =3D=3D (num_cw - 1)) { + if (oob_buf) { + oob_buf +=3D ecc_cfg->bbm_size; + qcom_write_data_dma(snandc, FLASH_BUF_ACC + data_size, + oob_buf, oob_size, 0); + } + } + + qcom_spi_config_cw_write(snandc); + + if (data_buf) + data_buf +=3D data_size; + if (oob_buf) + oob_buf +=3D oob_size; + } + + ret =3D qcom_submit_descs(snandc); + if (ret) { + dev_err(snandc->dev, "failure to write page\n"); + return ret; + } + + return 0; +} + +static int qcom_spi_program_oob(struct qcom_nand_controller *snandc, + const struct spi_mem_op *op) +{ + struct qpic_ecc *ecc_cfg =3D snandc->qspi->ecc; + u8 *oob_buf =3D NULL; + int ret, col, data_size, oob_size; + int num_cw =3D snandc->qspi->num_cw; + u32 cfg0, cfg1, ecc_bch_cfg, ecc_buf_cfg; + + cfg0 =3D (ecc_cfg->cfg0 & ~(7U << CW_PER_PAGE)) | + (num_cw - 1) << CW_PER_PAGE; + cfg1 =3D ecc_cfg->cfg1; + ecc_bch_cfg =3D ecc_cfg->ecc_bch_cfg; + ecc_buf_cfg =3D ecc_cfg->ecc_buf_cfg; + + col =3D ecc_cfg->cw_size * (num_cw - 1); + + oob_buf =3D snandc->qspi->data_buf; + + snandc->buf_count =3D 0; + snandc->buf_start =3D 0; + qcom_clear_read_regs(snandc); + qcom_clear_bam_transaction(snandc); + snandc->regs->addr0 =3D (snandc->qspi->addr1 | cpu_to_le32(col)); + snandc->regs->addr1 =3D snandc->qspi->addr2; + snandc->regs->cmd =3D snandc->qspi->cmd; + snandc->regs->cfg0 =3D cpu_to_le32(cfg0); + snandc->regs->cfg1 =3D cpu_to_le32(cfg1); + snandc->regs->ecc_bch_cfg =3D cpu_to_le32(ecc_bch_cfg); + snandc->regs->ecc_buf_cfg =3D cpu_to_le32(ecc_buf_cfg); + snandc->regs->exec =3D cpu_to_le32(1); + + /* calculate the data and oob size for the last codeword/step */ + data_size =3D NANDC_STEP_SIZE - ((num_cw - 1) << 2); + oob_size =3D snandc->qspi->mtd->oobavail; + + memset(snandc->data_buffer, 0xff, ecc_cfg->cw_data); + /* override new oob content to last codeword */ + mtd_ooblayout_get_databytes(snandc->qspi->mtd, snandc->data_buffer + data= _size, + oob_buf, 0, snandc->qspi->mtd->oobavail); + qcom_spi_config_page_write(snandc); + qcom_write_data_dma(snandc, FLASH_BUF_ACC, snandc->data_buffer, data_size= + oob_size, 0); + qcom_spi_config_cw_write(snandc); + + ret =3D qcom_submit_descs(snandc); + if (ret) { + dev_err(snandc->dev, "failure to write oob\n"); + return ret; + } + + return 0; +} + +static int qcom_spi_program_execute(struct qcom_nand_controller *snandc, + const struct spi_mem_op *op) +{ + if (snandc->qspi->page_rw && snandc->qspi->raw_rw) + return qcom_spi_program_raw(snandc, op); + + if (snandc->qspi->page_rw) + return qcom_spi_program_ecc(snandc, op); + + if (snandc->qspi->oob_rw) + return qcom_spi_program_oob(snandc, op); + + return 0; +} + +static int qcom_spi_cmd_mapping(struct qcom_nand_controller *snandc, u32 o= pcode) +{ + int cmd =3D 0x0; + + switch (opcode) { + case SPINAND_RESET: + cmd =3D (SPI_WP | SPI_HOLD | SPI_TRANSFER_MODE_x1 | OP_RESET_DEVICE); + break; + case SPINAND_READID: + cmd =3D (SPI_WP | SPI_HOLD | SPI_TRANSFER_MODE_x1 | OP_FETCH_ID); + break; + case SPINAND_GET_FEATURE: + cmd =3D (SPI_TRANSFER_MODE_x1 | SPI_WP | SPI_HOLD | ACC_FEATURE); + break; + case SPINAND_SET_FEATURE: + cmd =3D (SPI_TRANSFER_MODE_x1 | SPI_WP | SPI_HOLD | ACC_FEATURE | + QPIC_SET_FEATURE); + break; + case SPINAND_READ: + if (snandc->qspi->raw_rw) { + cmd =3D (PAGE_ACC | LAST_PAGE | SPI_TRANSFER_MODE_x1 | + SPI_WP | SPI_HOLD | OP_PAGE_READ); + } else { + cmd =3D (PAGE_ACC | LAST_PAGE | SPI_TRANSFER_MODE_x1 | + SPI_WP | SPI_HOLD | OP_PAGE_READ_WITH_ECC); + } + + break; + case SPINAND_ERASE: + cmd =3D OP_BLOCK_ERASE | PAGE_ACC | LAST_PAGE | SPI_WP | + SPI_HOLD | SPI_TRANSFER_MODE_x1; + break; + case SPINAND_WRITE_EN: + cmd =3D SPINAND_WRITE_EN; + break; + case SPINAND_PROGRAM_EXECUTE: + cmd =3D (PAGE_ACC | LAST_PAGE | SPI_TRANSFER_MODE_x1 | + SPI_WP | SPI_HOLD | OP_PROGRAM_PAGE); + break; + case SPINAND_PROGRAM_LOAD: + cmd =3D SPINAND_PROGRAM_LOAD; + break; + default: + dev_err(snandc->dev, "Opcode not supported: %u\n", opcode); + return -EOPNOTSUPP; + } + + return cmd; +} + +static int qcom_spi_write_page(struct qcom_nand_controller *snandc, + const struct spi_mem_op *op) +{ + int cmd; + + cmd =3D qcom_spi_cmd_mapping(snandc, op->cmd.opcode); + if (cmd < 0) + return cmd; + + if (op->cmd.opcode =3D=3D SPINAND_PROGRAM_LOAD) + snandc->qspi->data_buf =3D (u8 *)op->data.buf.out; + + return 0; +} + +static int qcom_spi_send_cmdaddr(struct qcom_nand_controller *snandc, + const struct spi_mem_op *op) +{ + struct qpic_snand_op s_op =3D {}; + u32 cmd; + int ret, opcode; + + ret =3D qcom_spi_cmd_mapping(snandc, op->cmd.opcode); + if (ret < 0) + return ret; + + cmd =3D ret; + + s_op.cmd_reg =3D cmd; + s_op.addr1_reg =3D op->addr.val; + s_op.addr2_reg =3D 0; + + opcode =3D op->cmd.opcode; + + switch (opcode) { + case SPINAND_WRITE_EN: + return 0; + case SPINAND_PROGRAM_EXECUTE: + s_op.addr1_reg =3D op->addr.val << 16; + s_op.addr2_reg =3D op->addr.val >> 16 & 0xff; + snandc->qspi->addr1 =3D cpu_to_le32(s_op.addr1_reg); + snandc->qspi->addr2 =3D cpu_to_le32(s_op.addr2_reg); + snandc->qspi->cmd =3D cpu_to_le32(cmd); + return qcom_spi_program_execute(snandc, op); + case SPINAND_READ: + s_op.addr1_reg =3D (op->addr.val << 16); + s_op.addr2_reg =3D op->addr.val >> 16 & 0xff; + snandc->qspi->addr1 =3D cpu_to_le32(s_op.addr1_reg); + snandc->qspi->addr2 =3D cpu_to_le32(s_op.addr2_reg); + snandc->qspi->cmd =3D cpu_to_le32(cmd); + return 0; + case SPINAND_ERASE: + s_op.addr2_reg =3D (op->addr.val >> 16) & 0xffff; + s_op.addr1_reg =3D op->addr.val; + snandc->qspi->addr1 =3D cpu_to_le32(s_op.addr1_reg << 16); + snandc->qspi->addr2 =3D cpu_to_le32(s_op.addr2_reg); + snandc->qspi->cmd =3D cpu_to_le32(cmd); + qcom_spi_block_erase(snandc); + return 0; + default: + break; + } + + snandc->buf_count =3D 0; + snandc->buf_start =3D 0; + qcom_clear_read_regs(snandc); + qcom_clear_bam_transaction(snandc); + + snandc->regs->cmd =3D cpu_to_le32(s_op.cmd_reg); + snandc->regs->exec =3D cpu_to_le32(1); + snandc->regs->addr0 =3D cpu_to_le32(s_op.addr1_reg); + snandc->regs->addr1 =3D cpu_to_le32(s_op.addr2_reg); + + qcom_write_reg_dma(snandc, &snandc->regs->cmd, NAND_FLASH_CMD, 3, NAND_BA= M_NEXT_SGL); + qcom_write_reg_dma(snandc, &snandc->regs->exec, NAND_EXEC_CMD, 1, NAND_BA= M_NEXT_SGL); + + ret =3D qcom_submit_descs(snandc); + if (ret) + dev_err(snandc->dev, "failure in submitting cmd descriptor\n"); + + return ret; +} + +static int qcom_spi_io_op(struct qcom_nand_controller *snandc, const struc= t spi_mem_op *op) +{ + int ret, val, opcode; + bool copy =3D false, copy_ftr =3D false; + + ret =3D qcom_spi_send_cmdaddr(snandc, op); + if (ret) + return ret; + + snandc->buf_count =3D 0; + snandc->buf_start =3D 0; + qcom_clear_read_regs(snandc); + qcom_clear_bam_transaction(snandc); + opcode =3D op->cmd.opcode; + + switch (opcode) { + case SPINAND_READID: + snandc->buf_count =3D 4; + qcom_read_reg_dma(snandc, NAND_READ_ID, 1, NAND_BAM_NEXT_SGL); + copy =3D true; + break; + case SPINAND_GET_FEATURE: + snandc->buf_count =3D 4; + qcom_read_reg_dma(snandc, NAND_FLASH_FEATURES, 1, NAND_BAM_NEXT_SGL); + copy_ftr =3D true; + break; + case SPINAND_SET_FEATURE: + snandc->regs->flash_feature =3D cpu_to_le32(*(u32 *)op->data.buf.out); + qcom_write_reg_dma(snandc, &snandc->regs->flash_feature, + NAND_FLASH_FEATURES, 1, NAND_BAM_NEXT_SGL); + break; + case SPINAND_PROGRAM_EXECUTE: + case SPINAND_WRITE_EN: + case SPINAND_RESET: + case SPINAND_ERASE: + case SPINAND_READ: + return 0; + default: + return -EOPNOTSUPP; + } + + ret =3D qcom_submit_descs(snandc); + if (ret) + dev_err(snandc->dev, "failure in submitting descriptor for:%d\n", opcode= ); + + if (copy) { + qcom_nandc_dev_to_mem(snandc, true); + memcpy(op->data.buf.in, snandc->reg_read_buf, snandc->buf_count); + } + + if (copy_ftr) { + qcom_nandc_dev_to_mem(snandc, true); + val =3D le32_to_cpu(*(__le32 *)snandc->reg_read_buf); + val >>=3D 8; + memcpy(op->data.buf.in, &val, snandc->buf_count); + } + + return ret; +} + +static bool qcom_spi_is_page_op(const struct spi_mem_op *op) +{ + if (op->addr.buswidth !=3D 1 && op->addr.buswidth !=3D 2 && op->addr.busw= idth !=3D 4) + return false; + + if (op->data.dir =3D=3D SPI_MEM_DATA_IN) { + if (op->addr.buswidth =3D=3D 4 && op->data.buswidth =3D=3D 4) + return true; + + if (op->addr.nbytes =3D=3D 2 && op->addr.buswidth =3D=3D 1) + return true; + + } else if (op->data.dir =3D=3D SPI_MEM_DATA_OUT) { + if (op->data.buswidth =3D=3D 4) + return true; + if (op->addr.nbytes =3D=3D 2 && op->addr.buswidth =3D=3D 1) + return true; + } + + return false; +} + +static bool qcom_spi_supports_op(struct spi_mem *mem, const struct spi_mem= _op *op) +{ + if (!spi_mem_default_supports_op(mem, op)) + return false; + + if (op->cmd.nbytes !=3D 1 || op->cmd.buswidth !=3D 1) + return false; + + if (qcom_spi_is_page_op(op)) + return true; + + return ((!op->addr.nbytes || op->addr.buswidth =3D=3D 1) && + (!op->dummy.nbytes || op->dummy.buswidth =3D=3D 1) && + (!op->data.nbytes || op->data.buswidth =3D=3D 1)); +} + +static int qcom_spi_exec_op(struct spi_mem *mem, const struct spi_mem_op *= op) +{ + struct qcom_nand_controller *snandc =3D spi_controller_get_devdata(mem->s= pi->controller); + + dev_dbg(snandc->dev, "OP %02x ADDR %08llX@%d:%u DATA %d:%u", op->cmd.opco= de, + op->addr.val, op->addr.buswidth, op->addr.nbytes, + op->data.buswidth, op->data.nbytes); + + if (qcom_spi_is_page_op(op)) { + if (op->data.dir =3D=3D SPI_MEM_DATA_IN) + return qcom_spi_read_page(snandc, op); + if (op->data.dir =3D=3D SPI_MEM_DATA_OUT) + return qcom_spi_write_page(snandc, op); + } else { + return qcom_spi_io_op(snandc, op); + } + + return 0; +} + +static const struct spi_controller_mem_ops qcom_spi_mem_ops =3D { + .supports_op =3D qcom_spi_supports_op, + .exec_op =3D qcom_spi_exec_op, +}; + +static const struct spi_controller_mem_caps qcom_spi_mem_caps =3D { + .ecc =3D true, +}; + +static int qcom_spi_probe(struct platform_device *pdev) +{ + struct device *dev =3D &pdev->dev; + struct spi_controller *ctlr; + struct qcom_nand_controller *snandc; + struct qpic_spi_nand *qspi; + struct qpic_ecc *ecc; + struct resource *res; + const void *dev_data; + int ret; + + ecc =3D devm_kzalloc(dev, sizeof(*ecc), GFP_KERNEL); + if (!ecc) + return -ENOMEM; + + qspi =3D devm_kzalloc(dev, sizeof(*qspi), GFP_KERNEL); + if (!qspi) + return -ENOMEM; + + ctlr =3D __devm_spi_alloc_controller(dev, sizeof(*snandc), false); + if (!ctlr) + return -ENOMEM; + + platform_set_drvdata(pdev, ctlr); + + snandc =3D spi_controller_get_devdata(ctlr); + qspi->snandc =3D snandc; + + snandc->dev =3D dev; + snandc->qspi =3D qspi; + snandc->qspi->ctlr =3D ctlr; + snandc->qspi->ecc =3D ecc; + + dev_data =3D of_device_get_match_data(dev); + if (!dev_data) { + dev_err(&pdev->dev, "failed to get device data\n"); + return -ENODEV; + } + + snandc->props =3D dev_data; + snandc->dev =3D &pdev->dev; + + snandc->core_clk =3D devm_clk_get(dev, "core"); + if (IS_ERR(snandc->core_clk)) + return PTR_ERR(snandc->core_clk); + + snandc->aon_clk =3D devm_clk_get(dev, "aon"); + if (IS_ERR(snandc->aon_clk)) + return PTR_ERR(snandc->aon_clk); + + snandc->qspi->iomacro_clk =3D devm_clk_get(dev, "iom"); + if (IS_ERR(snandc->qspi->iomacro_clk)) + return PTR_ERR(snandc->qspi->iomacro_clk); + + snandc->base =3D devm_platform_get_and_ioremap_resource(pdev, 0, &res); + if (IS_ERR(snandc->base)) + return PTR_ERR(snandc->base); + + snandc->base_phys =3D res->start; + snandc->base_dma =3D dma_map_resource(dev, res->start, resource_size(res), + DMA_BIDIRECTIONAL, 0); + if (dma_mapping_error(dev, snandc->base_dma)) + return -ENXIO; + + ret =3D clk_prepare_enable(snandc->core_clk); + if (ret) + goto err_dis_core_clk; + + ret =3D clk_prepare_enable(snandc->aon_clk); + if (ret) + goto err_dis_aon_clk; + + ret =3D clk_prepare_enable(snandc->qspi->iomacro_clk); + if (ret) + goto err_dis_iom_clk; + + ret =3D qcom_nandc_alloc(snandc); + if (ret) + goto err_snand_alloc; + + ret =3D qcom_spi_init(snandc); + if (ret) + goto err_spi_init; + + /* setup ECC engine */ + snandc->qspi->ecc_eng.dev =3D &pdev->dev; + snandc->qspi->ecc_eng.integration =3D NAND_ECC_ENGINE_INTEGRATION_PIPELIN= ED; + snandc->qspi->ecc_eng.ops =3D &qcom_spi_ecc_engine_ops_pipelined; + snandc->qspi->ecc_eng.priv =3D snandc; + + ret =3D nand_ecc_register_on_host_hw_engine(&snandc->qspi->ecc_eng); + if (ret) { + dev_err(&pdev->dev, "failed to register ecc engine:%d\n", ret); + goto err_spi_init; + } + + ctlr->num_chipselect =3D QPIC_QSPI_NUM_CS; + ctlr->mem_ops =3D &qcom_spi_mem_ops; + ctlr->mem_caps =3D &qcom_spi_mem_caps; + ctlr->dev.of_node =3D pdev->dev.of_node; + ctlr->mode_bits =3D SPI_TX_DUAL | SPI_RX_DUAL | + SPI_TX_QUAD | SPI_RX_QUAD; + + ret =3D spi_register_controller(ctlr); + if (ret) { + dev_err(&pdev->dev, "spi_register_controller failed.\n"); + goto err_spi_init; + } + + return 0; + +err_spi_init: + qcom_nandc_unalloc(snandc); +err_snand_alloc: + clk_disable_unprepare(snandc->qspi->iomacro_clk); +err_dis_iom_clk: + clk_disable_unprepare(snandc->aon_clk); +err_dis_aon_clk: + clk_disable_unprepare(snandc->core_clk); +err_dis_core_clk: + dma_unmap_resource(dev, res->start, resource_size(res), + DMA_BIDIRECTIONAL, 0); + return ret; +} + +static void qcom_spi_remove(struct platform_device *pdev) +{ + struct spi_controller *ctlr =3D platform_get_drvdata(pdev); + struct qcom_nand_controller *snandc =3D spi_controller_get_devdata(ctlr); + struct resource *res =3D platform_get_resource(pdev, IORESOURCE_MEM, 0); + + spi_unregister_controller(ctlr); + + qcom_nandc_unalloc(snandc); + + clk_disable_unprepare(snandc->aon_clk); + clk_disable_unprepare(snandc->core_clk); + clk_disable_unprepare(snandc->qspi->iomacro_clk); + + dma_unmap_resource(&pdev->dev, snandc->base_dma, resource_size(res), + DMA_BIDIRECTIONAL, 0); +} + +static const struct qcom_nandc_props ipq9574_snandc_props =3D { + .dev_cmd_reg_start =3D 0x7000, + .supports_bam =3D true, +}; + +static const struct of_device_id qcom_snandc_of_match[] =3D { + { + .compatible =3D "qcom,ipq9574-snand", + .data =3D &ipq9574_snandc_props, + }, + {} +} +MODULE_DEVICE_TABLE(of, qcom_snandc_of_match); + +static struct platform_driver qcom_spi_driver =3D { + .driver =3D { + .name =3D "qcom_snand", + .of_match_table =3D qcom_snandc_of_match, + }, + .probe =3D qcom_spi_probe, + .remove =3D qcom_spi_remove, +}; +module_platform_driver(qcom_spi_driver); + +MODULE_DESCRIPTION("SPI driver for QPIC QSPI cores"); +MODULE_AUTHOR("Md Sadre Alam "); +MODULE_LICENSE("GPL"); + diff --git a/include/linux/mtd/nand-qpic-common.h b/include/linux/mtd/nand-= qpic-common.h index e79c79775eb8..7dba89654d6c 100644 --- a/include/linux/mtd/nand-qpic-common.h +++ b/include/linux/mtd/nand-qpic-common.h @@ -322,6 +322,10 @@ struct nandc_regs { __le32 read_location_last1; __le32 read_location_last2; __le32 read_location_last3; + __le32 spi_cfg; + __le32 num_addr_cycle; + __le32 busy_wait_cnt; + __le32 flash_feature; =20 __le32 erased_cw_detect_cfg_clr; __le32 erased_cw_detect_cfg_set; @@ -336,6 +340,7 @@ struct nandc_regs { * * @core_clk: controller clock * @aon_clk: another controller clock + * @iomacro_clk: io macro clock * * @regs: a contiguous chunk of memory for DMA register * writes. contains the register values to be @@ -345,6 +350,7 @@ struct nandc_regs { * initialized via DT match data * * @controller: base controller structure + * @qspi: qpic spi structure * @host_list: list containing all the chips attached to the * controller * @@ -389,6 +395,7 @@ struct qcom_nand_controller { const struct qcom_nandc_props *props; =20 struct nand_controller *controller; + struct qpic_spi_nand *qspi; struct list_head host_list; =20 union { --=20 2.34.1