From patchwork Mon Apr 15 07:37:12 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Mason Yang X-Patchwork-Id: 10900223 X-Patchwork-Delegate: geert@linux-m68k.org Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 39214139A for ; Mon, 15 Apr 2019 07:17:27 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 1B09C2849B for ; Mon, 15 Apr 2019 07:17:27 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 0F6E228685; Mon, 15 Apr 2019 07:17:27 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-7.9 required=2.0 tests=BAYES_00,MAILING_LIST_MULTI, RCVD_IN_DNSWL_HI autolearn=ham version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 287162849B for ; Mon, 15 Apr 2019 07:17:26 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1725798AbfDOHR0 (ORCPT ); Mon, 15 Apr 2019 03:17:26 -0400 Received: from twhmllg3.macronix.com ([211.75.127.131]:48587 "EHLO TWHMLLG3.macronix.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725796AbfDOHRZ (ORCPT ); Mon, 15 Apr 2019 03:17:25 -0400 Received: from localhost.localdomain ([172.17.195.96]) by TWHMLLG3.macronix.com with ESMTP id x3F7HBqu066124; Mon, 15 Apr 2019 15:17:12 +0800 (GMT-8) (envelope-from masonccyang@mxic.com.tw) From: Mason Yang To: broonie@kernel.org, marek.vasut@gmail.com, linux-kernel@vger.kernel.org, linux-spi@vger.kernel.org, bbrezillon@kernel.org, linux-renesas-soc@vger.kernel.org, Geert Uytterhoeven , lee.jones@linaro.org, sergei.shtylyov@cogentembedded.com, robh+dt@kernel.org, mark.rutland@arm.com, devicetree@vger.kernel.org Cc: juliensu@mxic.com.tw, Simon Horman , Mason Yang Subject: [PATCH v10 1/3] mfd: Add Renesas R-Car Gen3 RPC-IF MFD controller driver Date: Mon, 15 Apr 2019 15:37:12 +0800 Message-Id: <1555313834-15107-2-git-send-email-masonccyang@mxic.com.tw> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1555313834-15107-1-git-send-email-masonccyang@mxic.com.tw> References: <1555313834-15107-1-git-send-email-masonccyang@mxic.com.tw> X-MAIL: TWHMLLG3.macronix.com x3F7HBqu066124 Sender: linux-renesas-soc-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-renesas-soc@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP Add a driver for Renesas R-Car Gen3 RPC-IF MFD controller. Signed-off-by: Mason Yang --- drivers/mfd/Kconfig | 9 +++ drivers/mfd/Makefile | 1 + drivers/mfd/renesas-rpc.c | 128 +++++++++++++++++++++++++++++++++ include/linux/mfd/renesas-rpc.h | 153 ++++++++++++++++++++++++++++++++++++++++ 4 files changed, 291 insertions(+) create mode 100644 drivers/mfd/renesas-rpc.c create mode 100644 include/linux/mfd/renesas-rpc.h diff --git a/drivers/mfd/Kconfig b/drivers/mfd/Kconfig index 26ad646..7914349 100644 --- a/drivers/mfd/Kconfig +++ b/drivers/mfd/Kconfig @@ -978,6 +978,15 @@ config MFD_RDC321X southbridge which provides access to GPIOs and Watchdog using the southbridge PCI device configuration space. +config MFD_RENESAS_RPC + tristate "Renesas R-Car Gen3 RPC-IF MFD driver" + select MFD_CORE + depends on ARCH_RENESAS + help + This supports for Renesas R-Car Gen3 RPC-IF multifunction device + controller which provides either SPI host controller or HyperFlash. + You have to select individual components under the corresponding menu. + config MFD_RT5033 tristate "Richtek RT5033 Power Management IC" depends on I2C diff --git a/drivers/mfd/Makefile b/drivers/mfd/Makefile index b4569ed7..4a49699 100644 --- a/drivers/mfd/Makefile +++ b/drivers/mfd/Makefile @@ -183,6 +183,7 @@ obj-$(CONFIG_MFD_INTEL_QUARK_I2C_GPIO) += intel_quark_i2c_gpio.o obj-$(CONFIG_LPC_SCH) += lpc_sch.o obj-$(CONFIG_LPC_ICH) += lpc_ich.o obj-$(CONFIG_MFD_RDC321X) += rdc321x-southbridge.o +obj-$(CONFIG_MFD_RENESAS_RPC) += renesas-rpc.o obj-$(CONFIG_MFD_JANZ_CMODIO) += janz-cmodio.o obj-$(CONFIG_MFD_JZ4740_ADC) += jz4740-adc.o obj-$(CONFIG_MFD_TPS6586X) += tps6586x.o diff --git a/drivers/mfd/renesas-rpc.c b/drivers/mfd/renesas-rpc.c new file mode 100644 index 0000000..a565f31 --- /dev/null +++ b/drivers/mfd/renesas-rpc.c @@ -0,0 +1,128 @@ +// SPDX-License-Identifier: GPL-2.0 +// +// Copyright (C) 2018 ~ 2019 Renesas Solutions Corp. +// Copyright (C) 2019 Macronix International Co., Ltd. +// +// R-Car Gen3 RPC-IF MFD driver +// +// Author: +// Mason Yang +// + +#include +#include + +static const struct mfd_cell rpc_hf_ctlr = { + .name = "rpc-hf", + .of_compatible = "renesas,rcar-rpc-hf", +}; + +static const struct mfd_cell rpc_spi_ctlr = { + .name = "rpc-spi", + .of_compatible = "renesas,rcar-rpc-spi", +}; + +static const struct regmap_range rpc_mfd_volatile_ranges[] = { + regmap_reg_range(RPC_SMRDR0, RPC_SMRDR1), + regmap_reg_range(RPC_SMWDR0, RPC_SMWDR1), + regmap_reg_range(RPC_CMNSR, RPC_CMNSR), +}; + +static const struct regmap_access_table rpc_mfd_volatile_table = { + .yes_ranges = rpc_mfd_volatile_ranges, + .n_yes_ranges = ARRAY_SIZE(rpc_mfd_volatile_ranges), +}; + +static const struct regmap_config rpc_mfd_regmap_config = { + .reg_bits = 32, + .val_bits = 32, + .reg_stride = 4, + .fast_io = true, + .max_register = RPC_PHYOFFSET2, + .volatile_table = &rpc_mfd_volatile_table, +}; + +static int rpc_mfd_probe(struct platform_device *pdev) +{ + struct device_node *flash; + const struct mfd_cell *cell; + struct resource *res; + struct rpc_mfd *rpc; + void __iomem *base; + int ret; + + flash = of_get_next_child(pdev->dev.of_node, NULL); + if (!flash) { + dev_warn(&pdev->dev, "no flash node found\n"); + return -ENODEV; + } + + ret = of_device_is_compatible(flash, "jedec,spi-nor"); + if (ret) { + cell = &rpc_spi_ctlr; + } else { + ret = of_device_is_compatible(flash, "cfi-flash"); + if (ret) { + cell = &rpc_hf_ctlr; + } else { + dev_warn(&pdev->dev, "no jedec spi/cfi device found\n"); + return -ENODEV; + } + } + + rpc = devm_kzalloc(&pdev->dev, sizeof(*rpc), GFP_KERNEL); + if (!rpc) + return -ENOMEM; + + rpc->clk_rpc = devm_clk_get(&pdev->dev, "rpc"); + if (IS_ERR(rpc->clk_rpc)) + return PTR_ERR(rpc->clk_rpc); + + res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "regs"); + base = devm_ioremap_resource(&pdev->dev, res); + if (IS_ERR(base)) + return PTR_ERR(base); + + rpc->regmap = devm_regmap_init_mmio(&pdev->dev, base, + &rpc_mfd_regmap_config); + if (IS_ERR(rpc->regmap)) { + dev_err(&pdev->dev, + "failed to init regmap for rpc-mfd, error %ld\n", + PTR_ERR(rpc->regmap)); + return PTR_ERR(rpc->regmap); + } + + res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "dirmap"); + rpc->dirmap = devm_ioremap_resource(&pdev->dev, res); + if (IS_ERR(rpc->dirmap)) + rpc->dirmap = NULL; + + rpc->rstc = devm_reset_control_get_exclusive(&pdev->dev, NULL); + if (IS_ERR(rpc->rstc)) + return PTR_ERR(rpc->rstc); + + platform_set_drvdata(pdev, rpc); + + ret = devm_mfd_add_devices(&pdev->dev, -1, cell, 1, NULL, 0, NULL); + + return ret; +} + +static const struct of_device_id rpc_mfd_of_match[] = { + { .compatible = "renesas,rcar-gen3-rpc", }, + {}, +}; +MODULE_DEVICE_TABLE(of, rpc_mfd_of_match); + +static struct platform_driver rpc_mfd_driver = { + .probe = rpc_mfd_probe, + .driver = { + .name = "rpc-mfd", + .of_match_table = rpc_mfd_of_match, + }, +}; +module_platform_driver(rpc_mfd_driver); + +MODULE_AUTHOR("Mason Yang "); +MODULE_DESCRIPTION("Renesas R-Car Gen3 RPC MFD driver"); +MODULE_LICENSE("GPL v2"); diff --git a/include/linux/mfd/renesas-rpc.h b/include/linux/mfd/renesas-rpc.h new file mode 100644 index 0000000..61ada14 --- /dev/null +++ b/include/linux/mfd/renesas-rpc.h @@ -0,0 +1,153 @@ +// SPDX-License-Identifier: GPL-2.0 +// +// Copyright (C) 2018 ~ 2019 Renesas Solutions Corp. +// Copyright (C) 2019 Macronix International Co., Ltd. +// +// R-Car Gen3 RPC-IF MFD driver +// +// Author: +// Mason Yang +// + +#ifndef __MFD_RENESAS_RPC_H +#define __MFD_RENESAS_RPC_H + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#define RPC_CMNCR 0x0000 // R/W +#define RPC_CMNCR_MD BIT(31) +#define RPC_CMNCR_SFDE BIT(24) // undocumented bit but must be set +#define RPC_CMNCR_MOIIO3(val) (((val) & 0x3) << 22) +#define RPC_CMNCR_MOIIO2(val) (((val) & 0x3) << 20) +#define RPC_CMNCR_MOIIO1(val) (((val) & 0x3) << 18) +#define RPC_CMNCR_MOIIO0(val) (((val) & 0x3) << 16) +#define RPC_CMNCR_MOIIO_HIZ (RPC_CMNCR_MOIIO0(3) | RPC_CMNCR_MOIIO1(3) | \ + RPC_CMNCR_MOIIO2(3) | RPC_CMNCR_MOIIO3(3)) +#define RPC_CMNCR_IO3FV(val) (((val) & 0x3) << 14) // undocumented +#define RPC_CMNCR_IO2FV(val) (((val) & 0x3) << 12) // undocumented +#define RPC_CMNCR_IO0FV(val) (((val) & 0x3) << 8) +#define RPC_CMNCR_IOFV_HIZ (RPC_CMNCR_IO0FV(3) | RPC_CMNCR_IO2FV(3) | \ + RPC_CMNCR_IO3FV(3)) +#define RPC_CMNCR_BSZ(val) (((val) & 0x3) << 0) + +#define RPC_SSLDR 0x0004 // R/W +#define RPC_SSLDR_SPNDL(d) (((d) & 0x7) << 16) +#define RPC_SSLDR_SLNDL(d) (((d) & 0x7) << 8) +#define RPC_SSLDR_SCKDL(d) (((d) & 0x7) << 0) + +#define RPC_DRCR 0x000C // R/W +#define RPC_DRCR_SSLN BIT(24) +#define RPC_DRCR_RBURST(v) ((((v) - 1) & 0x1F) << 16) +#define RPC_DRCR_RCF BIT(9) +#define RPC_DRCR_RBE BIT(8) +#define RPC_DRCR_SSLE BIT(0) + +#define RPC_DRCMR 0x0010 // R/W +#define RPC_DRCMR_CMD(c) (((c) & 0xFF) << 16) +#define RPC_DRCMR_OCMD(c) (((c) & 0xFF) << 0) + +#define RPC_DREAR 0x0014 // R/W +#define RPC_DREAR_EAV(c) (((c) & 0xf) << 16) +#define RPC_DREAR_EAC(c) (((c) & 0x7) << 0) + +#define RPC_DROPR 0x0018 // R/W + +#define RPC_DRENR 0x001C // R/W +#define RPC_DRENR_CDB(o) (u32)((((o) & 0x3) << 30)) +#define RPC_DRENR_OCDB(o) (((o) & 0x3) << 28) +#define RPC_DRENR_ADB(o) (((o) & 0x3) << 24) +#define RPC_DRENR_OPDB(o) (((o) & 0x3) << 20) +#define RPC_DRENR_DRDB(o) (((o) & 0x3) << 16) +#define RPC_DRENR_DME BIT(15) +#define RPC_DRENR_CDE BIT(14) +#define RPC_DRENR_OCDE BIT(12) +#define RPC_DRENR_ADE(v) (((v) & 0xF) << 8) +#define RPC_DRENR_OPDE(v) (((v) & 0xF) << 4) + +#define RPC_SMCR 0x0020 // R/W +#define RPC_SMCR_SSLKP BIT(8) +#define RPC_SMCR_SPIRE BIT(2) +#define RPC_SMCR_SPIWE BIT(1) +#define RPC_SMCR_SPIE BIT(0) + +#define RPC_SMCMR 0x0024 // R/W +#define RPC_SMCMR_CMD(c) (((c) & 0xFF) << 16) +#define RPC_SMCMR_OCMD(c) (((c) & 0xFF) << 0) + +#define RPC_SMADR 0x0028 // R/W +#define RPC_SMOPR 0x002C // R/W +#define RPC_SMOPR_OPD3(o) (((o) & 0xFF) << 24) +#define RPC_SMOPR_OPD2(o) (((o) & 0xFF) << 16) +#define RPC_SMOPR_OPD1(o) (((o) & 0xFF) << 8) +#define RPC_SMOPR_OPD0(o) (((o) & 0xFF) << 0) + +#define RPC_SMENR 0x0030 // R/W +#define RPC_SMENR_CDB(o) (((o) & 0x3) << 30) +#define RPC_SMENR_OCDB(o) (((o) & 0x3) << 28) +#define RPC_SMENR_ADB(o) (((o) & 0x3) << 24) +#define RPC_SMENR_OPDB(o) (((o) & 0x3) << 20) +#define RPC_SMENR_SPIDB(o) (((o) & 0x3) << 16) +#define RPC_SMENR_DME BIT(15) +#define RPC_SMENR_CDE BIT(14) +#define RPC_SMENR_OCDE BIT(12) +#define RPC_SMENR_ADE(v) (((v) & 0xF) << 8) +#define RPC_SMENR_OPDE(v) (((v) & 0xF) << 4) +#define RPC_SMENR_SPIDE(v) (((v) & 0xF) << 0) + +#define RPC_SMRDR0 0x0038 // R +#define RPC_SMRDR1 0x003C // R +#define RPC_SMWDR0 0x0040 // W +#define RPC_SMWDR1 0x0044 // W + +#define RPC_CMNSR 0x0048 // R +#define RPC_CMNSR_SSLF BIT(1) +#define RPC_CMNSR_TEND BIT(0) + +#define RPC_DRDMCR 0x0058 // R/W +#define RPC_DRDRENR 0x005C // R/W + +#define RPC_SMDMCR 0x0060 // R/W +#define RPC_SMDMCR_DMCYC(v) ((((v) - 1) & 0x1F) << 0) + +#define RPC_SMDRENR 0x0064 // R/W +#define RPC_SMDRENR_HYPE (0x7 << 12) +#define RPC_SMDRENR_ADDRE BIT(8) +#define RPC_SMDRENR_OPDRE BIT(4) +#define RPC_SMDRENR_SPIDRE BIT(0) + +#define RPC_PHYCNT 0x007C // R/W +#define RPC_PHYCNT_CAL BIT(31) +#define PRC_PHYCNT_OCTA_AA BIT(22) +#define PRC_PHYCNT_OCTA_SA BIT(23) +#define PRC_PHYCNT_EXDS BIT(21) +#define RPC_PHYCNT_OCT BIT(20) +#define RPC_PHYCNT_STRTIM(v) (((v) & 0x7) << 15) +#define RPC_PHYCNT_WBUF2 BIT(4) +#define RPC_PHYCNT_WBUF BIT(2) +#define RPC_PHYCNT_PHYMEM(v) (((v) & 0x3) << 0) + +#define RPC_PHYOFFSET1 0x0080 // R/W +#define RPC_PHYOFFSET1_DDRTMG(v) (((v) & 0x3) << 28) +#define RPC_PHYOFFSET2 0x0084 // R/W +#define RPC_PHYOFFSET2_OCTTMG(v) (((v) & 0x7) << 8) + +#define RPC_DIRMAP_SIZE 0x4000000 + +struct rpc_mfd { + struct clk *clk_rpc; + void __iomem *dirmap; + struct regmap *regmap; + struct reset_control *rstc; +}; + +#endif // __MFD_RENESAS_RPC_H From patchwork Mon Apr 15 07:37:13 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Mason Yang X-Patchwork-Id: 10900225 X-Patchwork-Delegate: geert@linux-m68k.org Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 34EF417E6 for ; Mon, 15 Apr 2019 07:17:32 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 163D11FE8B for ; Mon, 15 Apr 2019 07:17:32 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 0A1A928485; Mon, 15 Apr 2019 07:17:32 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-7.9 required=2.0 tests=BAYES_00,MAILING_LIST_MULTI, RCVD_IN_DNSWL_HI autolearn=ham version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id E25321FE8B for ; Mon, 15 Apr 2019 07:17:30 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1725851AbfDOHRa (ORCPT ); Mon, 15 Apr 2019 03:17:30 -0400 Received: from twhmllg3.macronix.com ([211.75.127.131]:48598 "EHLO TWHMLLG3.macronix.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725796AbfDOHRa (ORCPT ); Mon, 15 Apr 2019 03:17:30 -0400 Received: from localhost.localdomain ([172.17.195.96]) by TWHMLLG3.macronix.com with ESMTP id x3F7HBqv066124; Mon, 15 Apr 2019 15:17:13 +0800 (GMT-8) (envelope-from masonccyang@mxic.com.tw) From: Mason Yang To: broonie@kernel.org, marek.vasut@gmail.com, linux-kernel@vger.kernel.org, linux-spi@vger.kernel.org, bbrezillon@kernel.org, linux-renesas-soc@vger.kernel.org, Geert Uytterhoeven , lee.jones@linaro.org, sergei.shtylyov@cogentembedded.com, robh+dt@kernel.org, mark.rutland@arm.com, devicetree@vger.kernel.org Cc: juliensu@mxic.com.tw, Simon Horman , Mason Yang Subject: [PATCH v10 2/3] spi: Add Renesas R-Car Gen3 RPC-IF SPI controller driver Date: Mon, 15 Apr 2019 15:37:13 +0800 Message-Id: <1555313834-15107-3-git-send-email-masonccyang@mxic.com.tw> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1555313834-15107-1-git-send-email-masonccyang@mxic.com.tw> References: <1555313834-15107-1-git-send-email-masonccyang@mxic.com.tw> X-MAIL: TWHMLLG3.macronix.com x3F7HBqv066124 Sender: linux-renesas-soc-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-renesas-soc@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP Add a driver for Renesas R-Car Gen3 RPC-IF SPI controller. Signed-off-by: Mason Yang Signed-off-by: Sergei Shtylyov --- drivers/spi/Kconfig | 6 + drivers/spi/Makefile | 1 + drivers/spi/spi-renesas-rpc.c | 561 ++++++++++++++++++++++++++++++++++++++++++ 3 files changed, 568 insertions(+) create mode 100644 drivers/spi/spi-renesas-rpc.c diff --git a/drivers/spi/Kconfig b/drivers/spi/Kconfig index f761655..1f52bcf 100644 --- a/drivers/spi/Kconfig +++ b/drivers/spi/Kconfig @@ -564,6 +564,12 @@ config SPI_RSPI help SPI driver for Renesas RSPI and QSPI blocks. +config SPI_RENESAS_RPC + tristate "Renesas R-Car Gen3 RPC-IF controller" + depends on ARCH_RENESAS || COMPILE_TEST + help + SPI driver for Renesas R-Car Gen3 RPC-IF. + config SPI_QCOM_QSPI tristate "QTI QSPI controller" depends on ARCH_QCOM diff --git a/drivers/spi/Makefile b/drivers/spi/Makefile index d8fc03c..b3a3deb 100644 --- a/drivers/spi/Makefile +++ b/drivers/spi/Makefile @@ -86,6 +86,7 @@ obj-$(CONFIG_SPI_QUP) += spi-qup.o obj-$(CONFIG_SPI_ROCKCHIP) += spi-rockchip.o obj-$(CONFIG_SPI_RB4XX) += spi-rb4xx.o obj-$(CONFIG_SPI_RSPI) += spi-rspi.o +obj-$(CONFIG_SPI_RENESAS_RPC) += spi-renesas-rpc.o obj-$(CONFIG_SPI_S3C24XX) += spi-s3c24xx-hw.o spi-s3c24xx-hw-y := spi-s3c24xx.o spi-s3c24xx-hw-$(CONFIG_SPI_S3C24XX_FIQ) += spi-s3c24xx-fiq.o diff --git a/drivers/spi/spi-renesas-rpc.c b/drivers/spi/spi-renesas-rpc.c new file mode 100644 index 0000000..22bedd8 --- /dev/null +++ b/drivers/spi/spi-renesas-rpc.c @@ -0,0 +1,561 @@ +// SPDX-License-Identifier: GPL-2.0 +// +// Copyright (C) 2018 ~ 2019 Renesas Solutions Corp. +// Copyright (C) 2019 Macronix International Co., Ltd. +// +// R-Car Gen3 RPC-IF SPI/QSPI/Octa driver +// +// Author: +// Mason Yang +// + +#include +#include +#include + +#include + +struct rpc_spi { + struct rpc_mfd *mfd; + u32 cur_speed_hz; + u32 cmd; + u32 addr; + u32 dummy; + u32 smcr; + u32 smenr; + u32 xferlen; + u32 totalxferlen; + enum spi_mem_data_dir xfer_dir; +}; + +static int rpc_spi_set_freq(struct rpc_spi *rpc, unsigned long freq) +{ + int ret; + + if (rpc->cur_speed_hz == freq) + return 0; + + ret = clk_set_rate(rpc->mfd->clk_rpc, freq); + if (ret) + return ret; + + rpc->cur_speed_hz = freq; + return ret; +} + +static void rpc_spi_hw_init(struct rpc_spi *rpc) +{ + // + // NOTE: The 0x260 are undocumented bits, but they must be set. + // RPC_PHYCNT_STRTIM is strobe timing adjustment bit, + // 0x0 : the delay is biggest, + // 0x1 : the delay is 2nd biggest, + // On H3 ES1.x, the value should be 0, while on others, + // the value should be 6. + // + regmap_write(rpc->mfd->regmap, RPC_PHYCNT, RPC_PHYCNT_CAL | + RPC_PHYCNT_STRTIM(6) | 0x260); + + // + // NOTE: The 0x1511144 are undocumented bits, but they must be set + // for RPC_PHYOFFSET1. + // The 0x31 are undocumented bits, but they must be set + // for RPC_PHYOFFSET2. + // + regmap_write(rpc->mfd->regmap, RPC_PHYOFFSET1, + RPC_PHYOFFSET1_DDRTMG(3) | 0x1511144); + regmap_write(rpc->mfd->regmap, RPC_PHYOFFSET2, 0x31 | + RPC_PHYOFFSET2_OCTTMG(4)); + regmap_write(rpc->mfd->regmap, RPC_SSLDR, RPC_SSLDR_SPNDL(7) | + RPC_SSLDR_SLNDL(7) | RPC_SSLDR_SCKDL(7)); + regmap_write(rpc->mfd->regmap, RPC_CMNCR, RPC_CMNCR_MD | + RPC_CMNCR_SFDE | RPC_CMNCR_MOIIO_HIZ | RPC_CMNCR_IOFV_HIZ | + RPC_CMNCR_BSZ(0)); +} + +static int wait_msg_xfer_end(struct rpc_spi *rpc) +{ + u32 sts; + + return regmap_read_poll_timeout(rpc->mfd->regmap, RPC_CMNSR, sts, + sts & RPC_CMNSR_TEND, 0, USEC_PER_SEC); +} + +static u8 rpc_bits_set(u32 nbytes) +{ + nbytes = clamp(nbytes, 1U, 4U); + + return GENMASK(3, 4 - nbytes); +} + +static int rpc_spi_io_xfer(struct rpc_spi *rpc, + const void *tx_buf, void *rx_buf) +{ + u32 smenr, smcr, data, pos = 0; + int ret; + + regmap_update_bits(rpc->mfd->regmap, RPC_CMNCR, RPC_CMNCR_MD, + RPC_CMNCR_MD); + regmap_write(rpc->mfd->regmap, RPC_SMDRENR, 0); + regmap_write(rpc->mfd->regmap, RPC_SMCMR, rpc->cmd); + regmap_write(rpc->mfd->regmap, RPC_SMDMCR, rpc->dummy); + regmap_write(rpc->mfd->regmap, RPC_SMADR, rpc->addr); + smenr = rpc->smenr; + + if (tx_buf) { + while (pos < rpc->xferlen) { + u32 nbytes = rpc->xferlen - pos; + + regmap_write(rpc->mfd->regmap, RPC_SMWDR0, + get_unaligned((u32 *)(tx_buf + pos))); + + smcr = rpc->smcr | RPC_SMCR_SPIE; + + if (nbytes > 4) { + nbytes = 4; + smcr |= RPC_SMCR_SSLKP; + } + + regmap_write(rpc->mfd->regmap, RPC_SMENR, smenr); + regmap_write(rpc->mfd->regmap, RPC_SMCR, smcr); + ret = wait_msg_xfer_end(rpc); + if (ret) + goto err_out; + + pos += nbytes; + smenr = rpc->smenr & ~RPC_SMENR_CDE & + ~RPC_SMENR_ADE(0xf); + } + } else if (rx_buf) { + // + // RPC-IF spoils the data for the commands without an address + // phase (like RDID) in the manual mode, so we'll have to work + // around this issue by using the external address space read + // mode instead. + // + if (!(smenr & RPC_SMENR_ADE(0xf)) && rpc->mfd->dirmap) { + regmap_update_bits(rpc->mfd->regmap, RPC_CMNCR, + RPC_CMNCR_MD, 0); + regmap_write(rpc->mfd->regmap, RPC_DRCR, + RPC_DRCR_RBURST(32) | RPC_DRCR_RBE); + regmap_write(rpc->mfd->regmap, RPC_DREAR, + RPC_DREAR_EAC(1)); + regmap_write(rpc->mfd->regmap, RPC_DRCMR, rpc->cmd); + regmap_write(rpc->mfd->regmap, RPC_DRDMCR, rpc->dummy); + regmap_write(rpc->mfd->regmap, RPC_DROPR, 0); + regmap_write(rpc->mfd->regmap, RPC_DRENR, smenr); + memcpy_fromio(rx_buf, rpc->mfd->dirmap, rpc->xferlen); + regmap_write(rpc->mfd->regmap, RPC_DRCR, RPC_DRCR_RCF); + } else { + while (pos < rpc->xferlen) { + u32 nbytes = rpc->xferlen - pos; + + if (nbytes > 4) + nbytes = 4; + + regmap_write(rpc->mfd->regmap, RPC_SMENR, + smenr); + regmap_write(rpc->mfd->regmap, RPC_SMCR, + rpc->smcr | RPC_SMCR_SPIE); + ret = wait_msg_xfer_end(rpc); + if (ret) + goto err_out; + + regmap_read(rpc->mfd->regmap, RPC_SMRDR0, + &data); + memcpy(rx_buf + pos, &data, nbytes); + pos += nbytes; + + regmap_write(rpc->mfd->regmap, RPC_SMADR, + rpc->addr + pos); + } + } + } else { + regmap_write(rpc->mfd->regmap, RPC_SMENR, rpc->smenr); + regmap_write(rpc->mfd->regmap, RPC_SMCR, + rpc->smcr | RPC_SMCR_SPIE); + ret = wait_msg_xfer_end(rpc); + if (ret) + goto err_out; + } + + return 0; + +err_out: + return reset_control_reset(rpc->mfd->rstc); +} + +static void rpc_spi_mem_set_prep_op_cfg(struct spi_device *spi, + const struct spi_mem_op *op, + u64 *offs, size_t *len) +{ + struct rpc_spi *rpc = spi_controller_get_devdata(spi->controller); + + rpc->cmd = RPC_SMCMR_CMD(op->cmd.opcode); + rpc->smenr = RPC_SMENR_CDE | + RPC_SMENR_CDB(ilog2(op->cmd.buswidth)); + rpc->totalxferlen = 1; + rpc->xfer_dir = SPI_MEM_NO_DATA; + rpc->xferlen = 0; + rpc->addr = 0; + + if (op->addr.nbytes) { + rpc->smenr |= RPC_SMENR_ADB(ilog2(op->addr.buswidth)); + if (op->addr.nbytes == 4) + rpc->smenr |= RPC_SMENR_ADE(0xf); + else + rpc->smenr |= RPC_SMENR_ADE(0x7); + + if (offs && len) + rpc->addr = *offs; + else + rpc->addr = op->addr.val; + rpc->totalxferlen += op->addr.nbytes; + } + + if (op->dummy.nbytes) { + rpc->smenr |= RPC_SMENR_DME; + rpc->dummy = RPC_SMDMCR_DMCYC(op->dummy.nbytes * 8 / + op->dummy.buswidth); + rpc->totalxferlen += op->dummy.nbytes; + } + + if (op->data.nbytes || (offs && len)) { + switch (op->data.dir) { + case SPI_MEM_DATA_IN: + rpc->smcr = RPC_SMCR_SPIRE; + rpc->xfer_dir = SPI_MEM_DATA_IN; + break; + case SPI_MEM_DATA_OUT: + rpc->smcr = RPC_SMCR_SPIWE; + rpc->xfer_dir = SPI_MEM_DATA_OUT; + break; + default: + break; + } + + if (offs && len) { + rpc->smenr |= RPC_SMENR_SPIDE(rpc_bits_set(*len)) | + RPC_SMENR_SPIDB(ilog2(op->data.buswidth)); + rpc->xferlen = *len; + rpc->totalxferlen += *len; + } else { + rpc->smenr |= + RPC_SMENR_SPIDE(rpc_bits_set(op->data.nbytes)) | + RPC_SMENR_SPIDB(ilog2(op->data.buswidth)); + rpc->xferlen = op->data.nbytes; + rpc->totalxferlen += op->data.nbytes; + } + } +} + +static bool rpc_spi_mem_supports_op(struct spi_mem *mem, + const struct spi_mem_op *op) +{ + if (op->data.buswidth > 4 || op->addr.buswidth > 4 || + op->dummy.buswidth > 4 || op->cmd.buswidth > 4 || + op->addr.nbytes > 4) + return false; + + return true; +} + +static ssize_t rpc_spi_mem_dirmap_read(struct spi_mem_dirmap_desc *desc, + u64 offs, size_t len, void *buf) +{ + struct rpc_spi *rpc = + spi_controller_get_devdata(desc->mem->spi->controller); + loff_t from = offs & (RPC_DIRMAP_SIZE - 1); + size_t size = RPC_DIRMAP_SIZE - from; + int ret; + + if (offs + desc->info.offset + len > U32_MAX) + return -EINVAL; + + if (len > size) + len = size; + + ret = rpc_spi_set_freq(rpc, desc->mem->spi->max_speed_hz); + if (ret) + return ret; + + rpc_spi_mem_set_prep_op_cfg(desc->mem->spi, + &desc->info.op_tmpl, &offs, &len); + + regmap_update_bits(rpc->mfd->regmap, RPC_CMNCR, RPC_CMNCR_MD, 0); + regmap_write(rpc->mfd->regmap, RPC_DRCR, RPC_DRCR_RBURST(32) | + RPC_DRCR_RBE); + + regmap_write(rpc->mfd->regmap, RPC_DRCMR, rpc->cmd); + regmap_write(rpc->mfd->regmap, RPC_DREAR, + RPC_DREAR_EAV(offs >> 25) | RPC_DREAR_EAC(1)); + regmap_write(rpc->mfd->regmap, RPC_DROPR, 0); + regmap_write(rpc->mfd->regmap, RPC_DRENR, rpc->smenr); + regmap_write(rpc->mfd->regmap, RPC_DRDMCR, rpc->dummy); + regmap_write(rpc->mfd->regmap, RPC_DRDRENR, 0); + + memcpy_fromio(buf, rpc->mfd->dirmap + desc->info.offset + from, len); + + return len; +} + +static int rpc_spi_mem_dirmap_create(struct spi_mem_dirmap_desc *desc) +{ + struct rpc_spi *rpc = + spi_controller_get_devdata(desc->mem->spi->controller); + + if (desc->info.offset + desc->info.length > U32_MAX) + return -ENOTSUPP; + + if (!rpc_spi_mem_supports_op(desc->mem, &desc->info.op_tmpl)) + return -ENOTSUPP; + + if (!rpc->mfd->dirmap && + desc->info.op_tmpl.data.dir == SPI_MEM_DATA_IN) + return -ENOTSUPP; + + if (desc->info.op_tmpl.data.dir == SPI_MEM_DATA_OUT) + return -ENOTSUPP; + + return 0; +} + +static int rpc_spi_mem_exec_op(struct spi_mem *mem, + const struct spi_mem_op *op) +{ + struct rpc_spi *rpc = spi_controller_get_devdata(mem->spi->controller); + int ret; + + ret = rpc_spi_set_freq(rpc, mem->spi->max_speed_hz); + if (ret) + return ret; + + rpc_spi_mem_set_prep_op_cfg(mem->spi, op, NULL, NULL); + + ret = rpc_spi_io_xfer(rpc, + op->data.dir == SPI_MEM_DATA_OUT ? + op->data.buf.out : NULL, + op->data.dir == SPI_MEM_DATA_IN ? + op->data.buf.in : NULL); + + return ret; +} + +static const struct spi_controller_mem_ops rpc_spi_mem_ops = { + .supports_op = rpc_spi_mem_supports_op, + .exec_op = rpc_spi_mem_exec_op, + .dirmap_create = rpc_spi_mem_dirmap_create, + .dirmap_read = rpc_spi_mem_dirmap_read, +}; + +static void rpc_spi_transfer_setup(struct rpc_spi *rpc, + struct spi_message *msg) +{ + struct spi_transfer *t, xfer[4] = { }; + u32 i, xfercnt, xferpos = 0; + + rpc->totalxferlen = 0; + rpc->xfer_dir = SPI_MEM_NO_DATA; + + list_for_each_entry(t, &msg->transfers, transfer_list) { + if (t->tx_buf) { + xfer[xferpos].tx_buf = t->tx_buf; + xfer[xferpos].tx_nbits = t->tx_nbits; + } + + if (t->rx_buf) { + xfer[xferpos].rx_buf = t->rx_buf; + xfer[xferpos].rx_nbits = t->rx_nbits; + } + + if (t->len) { + xfer[xferpos++].len = t->len; + rpc->totalxferlen += t->len; + } + + if (list_is_last(&t->transfer_list, &msg->transfers)) { + if (xferpos > 1) { + if (t->rx_buf) { + rpc->xfer_dir = SPI_MEM_DATA_IN; + rpc->smcr = RPC_SMCR_SPIRE; + } else if (t->tx_buf) { + rpc->xfer_dir = SPI_MEM_DATA_OUT; + rpc->smcr = RPC_SMCR_SPIWE; + } + } + } + } + + xfercnt = xferpos; + rpc->xferlen = xfer[--xferpos].len; + rpc->cmd = RPC_SMCMR_CMD(((u8 *)xfer[0].tx_buf)[0]); + rpc->smenr = RPC_SMENR_CDE | + RPC_SMENR_CDB(ilog2((unsigned int)xfer[0].tx_nbits)); + rpc->addr = 0; + + if (xfercnt > 2 && xfer[1].len && xfer[1].tx_buf) { + rpc->smenr |= + RPC_SMENR_ADB(ilog2((unsigned int)xfer[1].tx_nbits)); + + for (i = 0; i < xfer[1].len; i++) + rpc->addr |= ((u8 *)xfer[1].tx_buf)[i] << + (8 * (xfer[1].len - i - 1)); + + if (xfer[1].len == 4) + rpc->smenr |= RPC_SMENR_ADE(0xf); + else + rpc->smenr |= RPC_SMENR_ADE(0x7); + } + + if (xfercnt > 3 && xfer[2].len && xfer[2].tx_buf) { + rpc->smenr |= RPC_SMENR_DME; + rpc->dummy = RPC_SMDMCR_DMCYC(xfer[2].len * 8 / + xfer[2].tx_nbits); + } + + for (i = xfercnt - 1; i < xfercnt && xfercnt > 1; i++) { + if (xfer[i].rx_buf) { + rpc->smenr |= + RPC_SMENR_SPIDE(rpc_bits_set(xfer[i].len)) | + RPC_SMENR_SPIDB(ilog2 + ((unsigned int)xfer[i].rx_nbits)); + } else if (xfer[i].tx_buf) { + rpc->smenr |= + RPC_SMENR_SPIDE(rpc_bits_set(xfer[i].len)) | + RPC_SMENR_SPIDB(ilog2 + ((unsigned int)xfer[i].tx_nbits)); + } + } +} + +static inline int rpc_spi_xfer_message(struct rpc_spi *rpc, + struct spi_transfer *data_xfer) +{ + int ret; + + ret = rpc_spi_set_freq(rpc, data_xfer->speed_hz); + if (ret) + return ret; + + ret = rpc_spi_io_xfer(rpc, + rpc->xfer_dir == SPI_MEM_DATA_OUT ? + data_xfer->tx_buf : NULL, + rpc->xfer_dir == SPI_MEM_DATA_IN ? + data_xfer->rx_buf : NULL); + + return ret; +} + +static int rpc_spi_transfer_one_message(struct spi_controller *ctlr, + struct spi_message *msg) +{ + struct rpc_spi *rpc = spi_controller_get_devdata(ctlr); + struct spi_transfer *data_xfer; + int ret; + + rpc_spi_transfer_setup(rpc, msg); + + data_xfer = list_last_entry(&msg->transfers, struct spi_transfer, + transfer_list); + + ret = rpc_spi_xfer_message(rpc, data_xfer); + if (ret) + goto out; + + msg->status = 0; + msg->actual_length = rpc->totalxferlen; +out: + spi_finalize_current_message(ctlr); + return 0; +} + +static int rpc_spi_probe(struct platform_device *pdev) +{ + struct spi_controller *ctlr; + struct rpc_mfd *rpc_mfd = dev_get_drvdata(pdev->dev.parent); + struct rpc_spi *rpc; + int ret; + + ctlr = spi_alloc_master(&pdev->dev, sizeof(*rpc)); + if (!ctlr) + return -ENOMEM; + + platform_set_drvdata(pdev, ctlr); + + rpc = spi_controller_get_devdata(ctlr); + + rpc->mfd = rpc_mfd; + ctlr->dev.of_node = pdev->dev.parent->of_node; + + pm_runtime_enable(&pdev->dev); + ctlr->auto_runtime_pm = true; + + ctlr->num_chipselect = 1; + ctlr->mem_ops = &rpc_spi_mem_ops; + ctlr->transfer_one_message = rpc_spi_transfer_one_message; + + ctlr->bits_per_word_mask = SPI_BPW_MASK(8); + ctlr->mode_bits = SPI_CPOL | SPI_CPHA | SPI_TX_QUAD | SPI_RX_QUAD; + + pm_runtime_get_sync(&pdev->dev); + rpc_spi_hw_init(rpc); + pm_runtime_put(&pdev->dev); + + ret = spi_register_controller(ctlr); + if (ret) { + dev_err(&pdev->dev, "spi_register_controller failed\n"); + goto err_put_ctlr; + } + return 0; + +err_put_ctlr: + spi_controller_put(ctlr); + pm_runtime_disable(&pdev->dev); + + return ret; +} + +static int rpc_spi_remove(struct platform_device *pdev) +{ + struct spi_controller *ctlr = platform_get_drvdata(pdev); + + pm_runtime_disable(&pdev->dev); + spi_unregister_controller(ctlr); + + return 0; +} + +#ifdef CONFIG_PM_SLEEP +static int rpc_spi_suspend(struct device *dev) +{ + struct spi_controller *ctlr = dev_get_drvdata(dev); + + return spi_controller_suspend(ctlr); +} + +static int rpc_spi_resume(struct device *dev) +{ + struct spi_controller *ctlr = dev_get_drvdata(dev); + + return spi_controller_resume(ctlr); +} + +static SIMPLE_DEV_PM_OPS(rpc_spi_pm_ops, rpc_spi_suspend, rpc_spi_resume); +#define DEV_PM_OPS (&rpc_spi_pm_ops) +#else +#define DEV_PM_OPS NULL +#endif + +static struct platform_driver rpc_spi_driver = { + .probe = rpc_spi_probe, + .remove = rpc_spi_remove, + .driver = { + .name = "rpc-spi", + .pm = DEV_PM_OPS, + }, +}; +module_platform_driver(rpc_spi_driver); + +MODULE_AUTHOR("Mason Yang "); +MODULE_DESCRIPTION("Renesas R-Car Gen3 RPC-IF SPI controller driver"); +MODULE_LICENSE("GPL v2"); From patchwork Mon Apr 15 07:37:14 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Mason Yang X-Patchwork-Id: 10900227 X-Patchwork-Delegate: geert@linux-m68k.org Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 47F7417E6 for ; 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Mon, 15 Apr 2019 03:17:34 -0400 Received: from localhost.localdomain ([172.17.195.96]) by TWHMLLG3.macronix.com with ESMTP id x3F7HBqw066124; Mon, 15 Apr 2019 15:17:14 +0800 (GMT-8) (envelope-from masonccyang@mxic.com.tw) From: Mason Yang To: broonie@kernel.org, marek.vasut@gmail.com, linux-kernel@vger.kernel.org, linux-spi@vger.kernel.org, bbrezillon@kernel.org, linux-renesas-soc@vger.kernel.org, Geert Uytterhoeven , lee.jones@linaro.org, sergei.shtylyov@cogentembedded.com, robh+dt@kernel.org, mark.rutland@arm.com, devicetree@vger.kernel.org Cc: juliensu@mxic.com.tw, Simon Horman , Mason Yang Subject: [PATCH v10 3/3] dt-bindings: mfd: Document Renesas R-Car Gen3 RPC-IF controller bindings Date: Mon, 15 Apr 2019 15:37:14 +0800 Message-Id: <1555313834-15107-4-git-send-email-masonccyang@mxic.com.tw> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1555313834-15107-1-git-send-email-masonccyang@mxic.com.tw> References: <1555313834-15107-1-git-send-email-masonccyang@mxic.com.tw> X-MAIL: TWHMLLG3.macronix.com x3F7HBqw066124 Sender: linux-renesas-soc-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-renesas-soc@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP Document the bindings used by the Renesas R-Car Gen3 RPC-IF MFD controller. Signed-off-by: Mason Yang --- .../devicetree/bindings/mfd/mfd-renesas-rpc.txt | 37 ++++++++++++++++++++++ 1 file changed, 37 insertions(+) create mode 100644 Documentation/devicetree/bindings/mfd/mfd-renesas-rpc.txt diff --git a/Documentation/devicetree/bindings/mfd/mfd-renesas-rpc.txt b/Documentation/devicetree/bindings/mfd/mfd-renesas-rpc.txt new file mode 100644 index 0000000..bfb3d29 --- /dev/null +++ b/Documentation/devicetree/bindings/mfd/mfd-renesas-rpc.txt @@ -0,0 +1,37 @@ +Renesas R-Car Gen3 RPC-IF MFD controller Device Tree Bindings +------------------------------------------------------------- + +Required properties: +- compatible: should be an SoC-specific compatible value, followed by + "renesas,rcar-gen3-rpc" as a fallback. + supported SoC-specific values are: + "renesas,r8a77995-rpc" (R-Car D3) +- reg: should contain 2 entries, one for the base address of rpc-if registers, + and one for the direct mapping area +- reg-names: should contain "regs", and "dirmap" +- clocks: should contain 1 entries for the module's clock +- clock-names: should contain "rpc" +- #address-cells: should be 1 +- #size-cells: should be 0 + +Example: + + rpc: rpc-if@ee200000 { + compatible = "renesas,r8a77995-rpc", "renesas,rcar-gen3-rpc"; + reg = <0 0xee200000 0 0x200>, <0 0x08000000 0 0x4000000>; + reg-names = "regs", "dirmap"; + clocks = <&cpg CPG_MOD 917>; + clock-names = "rpc"; + power-domains = <&sysc R8A77995_PD_ALWAYS_ON>; + resets = <&cpg 917>; + #address-cells = <1>; + #size-cells = <0>; + + flash@0 { + compatible = "jedec,spi-nor"; + reg = <0>; + spi-max-frequency = <40000000>; + spi-tx-bus-width = <1>; + spi-rx-bus-width = <1>; + }; + };