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[209.132.180.67]) by mx.google.com with ESMTP id e13si7874537pgu.102.2019.03.05.07.53.04; Tue, 05 Mar 2019 07:53:04 -0800 (PST) Received-SPF: pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) client-ip=209.132.180.67; Authentication-Results: mx.google.com; dkim=pass header.i=@ti.com header.s=ti-com-17Q1 header.b=lFuImi5a; spf=pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=pass (p=QUARANTINE sp=NONE dis=NONE) header.from=ti.com Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728887AbfCEPxD (ORCPT + 31 others); Tue, 5 Mar 2019 10:53:03 -0500 Received: from lelv0143.ext.ti.com ([198.47.23.248]:50176 "EHLO lelv0143.ext.ti.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727766AbfCEPwr (ORCPT ); Tue, 5 Mar 2019 10:52:47 -0500 Received: from lelv0266.itg.ti.com ([10.180.67.225]) by lelv0143.ext.ti.com (8.15.2/8.15.2) with ESMTP id x25FqaML065491; Tue, 5 Mar 2019 09:52:36 -0600 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=ti.com; s=ti-com-17Q1; t=1551801156; bh=Eo9/er3BhOuiXdVz/9t0APRBRuHFyWo5b5Cl3rXxJVM=; h=From:To:CC:Subject:Date; b=lFuImi5aQBns+t0beE+IQQT6zPT0d24I4r2CF+dUcQ9eYQP9tDdMLKi6hjeklzuXG Kpr7q2IBTuBtArKUGwHxjXYpalEAAe/yO5O8HtIbWlG6065lWV5cmais0GjxiTkzsP vABYA3eu/mO/n/thqFDpkXE2EMCfzAuAv6AT6BwI= Received: from DLEE114.ent.ti.com (dlee114.ent.ti.com [157.170.170.25]) by lelv0266.itg.ti.com (8.15.2/8.15.2) with ESMTPS id x25FqaUo112370 (version=TLSv1.2 cipher=AES256-GCM-SHA384 bits=256 verify=FAIL); Tue, 5 Mar 2019 09:52:36 -0600 Received: from DLEE105.ent.ti.com (157.170.170.35) by DLEE114.ent.ti.com (157.170.170.25) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256_P256) id 15.1.1591.10; Tue, 5 Mar 2019 09:52:36 -0600 Received: from dlep32.itg.ti.com (157.170.170.100) by DLEE105.ent.ti.com (157.170.170.35) with Microsoft SMTP Server (version=TLS1_0, cipher=TLS_RSA_WITH_AES_256_CBC_SHA) id 15.1.1591.10 via Frontend Transport; Tue, 5 Mar 2019 09:52:36 -0600 Received: from legion.dal.desgin.ti.com (legion.dal.design.ti.com [128.247.22.53]) by dlep32.itg.ti.com (8.14.3/8.13.8) with ESMTP id x25FqaUs001730; Tue, 5 Mar 2019 09:52:36 -0600 Received: from localhost (a0272616local-lt.dhcp.ti.com [172.22.71.209]) by legion.dal.desgin.ti.com (8.11.7p1+Sun/8.11.7) with ESMTP id x25FqZU00508; Tue, 5 Mar 2019 09:52:35 -0600 (CST) From: Dan Murphy To: , , CC: , , , Dan Murphy Subject: [PATCH v7 1/4] can: m_can: Create a m_can platform framework Date: Tue, 5 Mar 2019 09:52:17 -0600 Message-ID: <20190305155220.14037-1-dmurphy@ti.com> X-Mailer: git-send-email 2.12.2 MIME-Version: 1.0 X-EXCLAIMER-MD-CONFIG: e1e8a2fd-e40a-4ac6-ac9b-f7e9cc9ee180 Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Create a m_can platform framework that peripherial devices can register to and use common code and register sets. The peripherial devices may provide read/write and configuration support of the IP. Signed-off-by: Dan Murphy --- v7 - Fixed remaining new checkpatch issues, removed CSR setting, fixed tx hard start function to return tx_busy, and renamed device callbacks - https://lore.kernel.org/patchwork/patch/1047220/ v6 - Squashed platform patch to this patch for bissectablity, fixed coding style issues, updated Kconfig help, placed mcan reg offsets back into c file, renamed priv->skb to priv->tx_skb and cleared perp interrupts at ISR start - Patch 1 comments - https://lore.kernel.org/patchwork/patch/1042446/ Patch 2 comments - https://lore.kernel.org/patchwork/patch/1042442/ drivers/net/can/m_can/Kconfig | 13 +- drivers/net/can/m_can/Makefile | 1 + drivers/net/can/m_can/m_can.c | 700 +++++++++++++------------ drivers/net/can/m_can/m_can.h | 110 ++++ drivers/net/can/m_can/m_can_platform.c | 202 +++++++ 5 files changed, 682 insertions(+), 344 deletions(-) create mode 100644 drivers/net/can/m_can/m_can.h create mode 100644 drivers/net/can/m_can/m_can_platform.c -- 2.20.1.390.gb5101f9297 diff --git a/drivers/net/can/m_can/Kconfig b/drivers/net/can/m_can/Kconfig index 04f20dd39007..f7119fd72df4 100644 --- a/drivers/net/can/m_can/Kconfig +++ b/drivers/net/can/m_can/Kconfig @@ -1,5 +1,14 @@ config CAN_M_CAN + tristate "Bosch M_CAN support" + ---help--- + Say Y here if you want support for Bosch M_CAN controller framework. + This is common support for devices that embed the Bosch M_CAN IP. + +config CAN_M_CAN_PLATFORM + tristate "Bosch M_CAN support for io-mapped devices" depends on HAS_IOMEM - tristate "Bosch M_CAN devices" + depends on CAN_M_CAN ---help--- - Say Y here if you want to support for Bosch M_CAN controller. + Say Y here if you want support for IO Mapped Bosch M_CAN controller. + This support is for devices that have the Bosch M_CAN controller + IP embedded into the device and the IP is IO Mapped to the processor. diff --git a/drivers/net/can/m_can/Makefile b/drivers/net/can/m_can/Makefile index 8bbd7f24f5be..057bbcdb3c74 100644 --- a/drivers/net/can/m_can/Makefile +++ b/drivers/net/can/m_can/Makefile @@ -3,3 +3,4 @@ # obj-$(CONFIG_CAN_M_CAN) += m_can.o +obj-$(CONFIG_CAN_M_CAN_PLATFORM) += m_can_platform.o diff --git a/drivers/net/can/m_can/m_can.c b/drivers/net/can/m_can/m_can.c index 9b449400376b..a60278d94126 100644 --- a/drivers/net/can/m_can/m_can.c +++ b/drivers/net/can/m_can/m_can.c @@ -1,20 +1,14 @@ -/* - * CAN bus driver for Bosch M_CAN controller - * - * Copyright (C) 2014 Freescale Semiconductor, Inc. - * Dong Aisheng - * - * Bosch M_CAN user manual can be obtained from: +// SPDX-License-Identifier: GPL-2.0 +// CAN bus driver for Bosch M_CAN controller +// Copyright (C) 2014 Freescale Semiconductor, Inc. +// Dong Aisheng +// Copyright (C) 2018-19 Texas Instruments Incorporated - http://www.ti.com/ + +/* Bosch M_CAN user manual can be obtained from: * http://www.bosch-semiconductors.de/media/pdf_1/ipmodules_1/m_can/ * mcan_users_manual_v302.pdf - * - * This file is licensed under the terms of the GNU General Public - * License version 2. This program is licensed "as is" without any - * warranty of any kind, whether express or implied. */ -#include -#include #include #include #include @@ -28,11 +22,7 @@ #include #include -/* napi related */ -#define M_CAN_NAPI_WEIGHT 64 - -/* message ram configuration data length */ -#define MRAM_CFG_LEN 8 +#include "m_can.h" /* registers definition */ enum m_can_reg { @@ -86,28 +76,11 @@ enum m_can_reg { M_CAN_TXEFA = 0xf8, }; -/* m_can lec values */ -enum m_can_lec_type { - LEC_NO_ERROR = 0, - LEC_STUFF_ERROR, - LEC_FORM_ERROR, - LEC_ACK_ERROR, - LEC_BIT1_ERROR, - LEC_BIT0_ERROR, - LEC_CRC_ERROR, - LEC_UNUSED, -}; +/* napi related */ +#define M_CAN_NAPI_WEIGHT 64 -enum m_can_mram_cfg { - MRAM_SIDF = 0, - MRAM_XIDF, - MRAM_RXF0, - MRAM_RXF1, - MRAM_RXB, - MRAM_TXE, - MRAM_TXB, - MRAM_CFG_NUM, -}; +/* message ram configuration data length */ +#define MRAM_CFG_LEN 8 /* Core Release Register (CREL) */ #define CREL_REL_SHIFT 28 @@ -347,68 +320,72 @@ enum m_can_mram_cfg { #define TX_EVENT_MM_SHIFT TX_BUF_MM_SHIFT #define TX_EVENT_MM_MASK (0xff << TX_EVENT_MM_SHIFT) -/* address offset and element number for each FIFO/Buffer in the Message RAM */ -struct mram_cfg { - u16 off; - u8 num; -}; - -/* m_can private data structure */ -struct m_can_priv { - struct can_priv can; /* must be the first member */ - struct napi_struct napi; - struct net_device *dev; - struct device *device; - struct clk *hclk; - struct clk *cclk; - void __iomem *base; - u32 irqstatus; - int version; - - /* message ram configuration */ - void __iomem *mram_base; - struct mram_cfg mcfg[MRAM_CFG_NUM]; -}; +static u32 m_can_read(struct m_can_priv *priv, enum m_can_reg reg) +{ + if (priv->ops->read_reg) + return priv->ops->read_reg(priv, reg); + else + return -EINVAL; +} -static inline u32 m_can_read(const struct m_can_priv *priv, enum m_can_reg reg) +static int m_can_write(struct m_can_priv *priv, enum m_can_reg reg, u32 val) { - return readl(priv->base + reg); + if (priv->ops->write_reg) + return priv->ops->write_reg(priv, reg, val); + else + return -EINVAL; } -static inline void m_can_write(const struct m_can_priv *priv, - enum m_can_reg reg, u32 val) +static u32 m_can_fifo_read(struct m_can_priv *priv, + u32 fgi, unsigned int offset) { - writel(val, priv->base + reg); + u32 addr_offset = priv->mcfg[MRAM_RXF0].off + fgi * RXF0_ELEMENT_SIZE + + offset; + + if (priv->ops->read_fifo) + return priv->ops->read_fifo(priv, addr_offset); + else + return -EINVAL; } -static inline u32 m_can_fifo_read(const struct m_can_priv *priv, - u32 fgi, unsigned int offset) +static u32 m_can_fifo_write(struct m_can_priv *priv, + u32 fpi, unsigned int offset, u32 val) { - return readl(priv->mram_base + priv->mcfg[MRAM_RXF0].off + - fgi * RXF0_ELEMENT_SIZE + offset); + u32 addr_offset = priv->mcfg[MRAM_TXB].off + fpi * TXB_ELEMENT_SIZE + + offset; + + if (priv->ops->write_fifo) + return priv->ops->write_fifo(priv, addr_offset, val); + else + return -EINVAL; } -static inline void m_can_fifo_write(const struct m_can_priv *priv, - u32 fpi, unsigned int offset, u32 val) +static u32 m_can_fifo_write_no_off(struct m_can_priv *priv, + u32 fpi, u32 val) { - writel(val, priv->mram_base + priv->mcfg[MRAM_TXB].off + - fpi * TXB_ELEMENT_SIZE + offset); + if (priv->ops->write_fifo) + return priv->ops->write_fifo(priv, fpi, val); + else + return 0; } -static inline u32 m_can_txe_fifo_read(const struct m_can_priv *priv, - u32 fgi, - u32 offset) { - return readl(priv->mram_base + priv->mcfg[MRAM_TXE].off + - fgi * TXE_ELEMENT_SIZE + offset); +static u32 m_can_txe_fifo_read(struct m_can_priv *priv, u32 fgi, u32 offset) +{ + u32 addr_offset = priv->mcfg[MRAM_TXE].off + fgi * TXE_ELEMENT_SIZE + + offset; + + if (priv->ops->read_fifo) + return priv->ops->read_fifo(priv, addr_offset); + else + return -EINVAL; } -static inline bool m_can_tx_fifo_full(const struct m_can_priv *priv) +static inline bool m_can_tx_fifo_full(struct m_can_priv *priv) { return !!(m_can_read(priv, M_CAN_TXFQS) & TXFQS_TFQF); } -static inline void m_can_config_endisable(const struct m_can_priv *priv, - bool enable) +void m_can_config_endisable(struct m_can_priv *priv, bool enable) { u32 cccr = m_can_read(priv, M_CAN_CCCR); u32 timeout = 10; @@ -430,7 +407,7 @@ static inline void m_can_config_endisable(const struct m_can_priv *priv, while ((m_can_read(priv, M_CAN_CCCR) & (CCCR_INIT | CCCR_CCE)) != val) { if (timeout == 0) { - netdev_warn(priv->dev, "Failed to init module\n"); + netdev_warn(priv->net, "Failed to init module\n"); return; } timeout--; @@ -438,13 +415,13 @@ static inline void m_can_config_endisable(const struct m_can_priv *priv, } } -static inline void m_can_enable_all_interrupts(const struct m_can_priv *priv) +static inline void m_can_enable_all_interrupts(struct m_can_priv *priv) { /* Only interrupt line 0 is used in this driver */ m_can_write(priv, M_CAN_ILE, ILE_EINT0); } -static inline void m_can_disable_all_interrupts(const struct m_can_priv *priv) +static inline void m_can_disable_all_interrupts(struct m_can_priv *priv) { m_can_write(priv, M_CAN_ILE, 0x0); } @@ -633,9 +610,12 @@ static int m_can_clk_start(struct m_can_priv *priv) { int err; - err = pm_runtime_get_sync(priv->device); + if (priv->pm_clock_support == 0) + return 0; + + err = pm_runtime_get_sync(priv->dev); if (err < 0) { - pm_runtime_put_noidle(priv->device); + pm_runtime_put_noidle(priv->dev); return err; } @@ -644,7 +624,8 @@ static int m_can_clk_start(struct m_can_priv *priv) static void m_can_clk_stop(struct m_can_priv *priv) { - pm_runtime_put_sync(priv->device); + if (priv->pm_clock_support) + pm_runtime_put_sync(priv->dev); } static int m_can_get_berr_counter(const struct net_device *dev, @@ -811,9 +792,8 @@ static int m_can_handle_bus_errors(struct net_device *dev, u32 irqstatus, return work_done; } -static int m_can_poll(struct napi_struct *napi, int quota) +static int m_can_rx_handler(struct net_device *dev, int quota) { - struct net_device *dev = napi->dev; struct m_can_priv *priv = netdev_priv(dev); int work_done = 0; u32 irqstatus, psr; @@ -831,13 +811,33 @@ static int m_can_poll(struct napi_struct *napi, int quota) if (irqstatus & IR_RF0N) work_done += m_can_do_rx_poll(dev, (quota - work_done)); +end: + return work_done; +} + +static int m_can_rx_peripherial(struct net_device *dev) +{ + struct m_can_priv *priv = netdev_priv(dev); + + m_can_rx_handler(dev, 1); + + m_can_enable_all_interrupts(priv); + + return 0; +} +static int m_can_poll(struct napi_struct *napi, int quota) +{ + struct net_device *dev = napi->dev; + struct m_can_priv *priv = netdev_priv(dev); + int work_done; + + work_done = m_can_rx_handler(dev, quota); if (work_done < quota) { napi_complete_done(napi, work_done); m_can_enable_all_interrupts(priv); } -end: return work_done; } @@ -894,6 +894,9 @@ static irqreturn_t m_can_isr(int irq, void *dev_id) if (ir & IR_ALL_INT) m_can_write(priv, M_CAN_IR, ir); + if (priv->ops->clear_interrupts) + priv->ops->clear_interrupts(priv); + /* schedule NAPI in case of * - rx IRQ * - state change IRQ @@ -902,7 +905,10 @@ static irqreturn_t m_can_isr(int irq, void *dev_id) if ((ir & IR_RF0N) || (ir & IR_ERR_ALL_30X)) { priv->irqstatus = ir; m_can_disable_all_interrupts(priv); - napi_schedule(&priv->napi); + if (!priv->is_peripherial) + napi_schedule(&priv->napi); + else + m_can_rx_peripherial(dev); } if (priv->version == 30) { @@ -1155,6 +1161,9 @@ static void m_can_chip_config(struct net_device *dev) m_can_set_bittiming(dev); m_can_config_endisable(priv, false); + + if (priv->ops->init) + priv->ops->init(priv); } static void m_can_start(struct net_device *dev) @@ -1188,20 +1197,17 @@ static int m_can_set_mode(struct net_device *dev, enum can_mode mode) * else it returns the release and step coded as: * return value = 10 * + 1 * */ -static int m_can_check_core_release(void __iomem *m_can_base) +static int m_can_check_core_release(struct m_can_priv *priv) { u32 crel_reg; u8 rel; u8 step; int res; - struct m_can_priv temp_priv = { - .base = m_can_base - }; /* Read Core Release Version and split into version number * Example: Version 3.2.1 => rel = 3; step = 2; substep = 1; */ - crel_reg = m_can_read(&temp_priv, M_CAN_CREL); + crel_reg = m_can_read(priv, M_CAN_CREL); rel = (u8)((crel_reg & CREL_REL_MASK) >> CREL_REL_SHIFT); step = (u8)((crel_reg & CREL_STEP_MASK) >> CREL_STEP_SHIFT); @@ -1219,18 +1225,26 @@ static int m_can_check_core_release(void __iomem *m_can_base) /* Selectable Non ISO support only in version 3.2.x * This function checks if the bit is writable. */ -static bool m_can_niso_supported(const struct m_can_priv *priv) +static bool m_can_niso_supported(struct m_can_priv *priv) { - u32 cccr_reg, cccr_poll; - int niso_timeout; + u32 cccr_reg, cccr_poll = 0; + int niso_timeout = -ETIMEDOUT; + int i; m_can_config_endisable(priv, true); cccr_reg = m_can_read(priv, M_CAN_CCCR); cccr_reg |= CCCR_NISO; m_can_write(priv, M_CAN_CCCR, cccr_reg); - niso_timeout = readl_poll_timeout((priv->base + M_CAN_CCCR), cccr_poll, - (cccr_poll == cccr_reg), 0, 10); + for (i = 0; i <= 10; i++) { + cccr_poll = m_can_read(priv, M_CAN_CCCR); + if (cccr_poll == cccr_reg) { + niso_timeout = 0; + break; + } + + usleep_range(1, 5); + } /* Clear NISO */ cccr_reg &= ~(CCCR_NISO); @@ -1242,107 +1256,79 @@ static bool m_can_niso_supported(const struct m_can_priv *priv) return !niso_timeout; } -static int m_can_dev_setup(struct platform_device *pdev, struct net_device *dev, - void __iomem *addr) +static int m_can_dev_setup(struct m_can_priv *m_can_dev) { - struct m_can_priv *priv; + struct net_device *dev = m_can_dev->net; int m_can_version; - m_can_version = m_can_check_core_release(addr); + m_can_version = m_can_check_core_release(m_can_dev); /* return if unsupported version */ if (!m_can_version) { - dev_err(&pdev->dev, "Unsupported version number: %2d", + dev_err(m_can_dev->dev, "Unsupported version number: %2d", m_can_version); return -EINVAL; } - priv = netdev_priv(dev); - netif_napi_add(dev, &priv->napi, m_can_poll, M_CAN_NAPI_WEIGHT); + if (!m_can_dev->is_peripherial) + netif_napi_add(dev, &m_can_dev->napi, + m_can_poll, M_CAN_NAPI_WEIGHT); /* Shared properties of all M_CAN versions */ - priv->version = m_can_version; - priv->dev = dev; - priv->base = addr; - priv->can.do_set_mode = m_can_set_mode; - priv->can.do_get_berr_counter = m_can_get_berr_counter; + m_can_dev->version = m_can_version; + m_can_dev->can.do_set_mode = m_can_set_mode; + m_can_dev->can.do_get_berr_counter = m_can_get_berr_counter; /* Set M_CAN supported operations */ - priv->can.ctrlmode_supported = CAN_CTRLMODE_LOOPBACK | + m_can_dev->can.ctrlmode_supported = CAN_CTRLMODE_LOOPBACK | CAN_CTRLMODE_LISTENONLY | CAN_CTRLMODE_BERR_REPORTING | CAN_CTRLMODE_FD; /* Set properties depending on M_CAN version */ - switch (priv->version) { + switch (m_can_dev->version) { case 30: /* CAN_CTRLMODE_FD_NON_ISO is fixed with M_CAN IP v3.0.x */ can_set_static_ctrlmode(dev, CAN_CTRLMODE_FD_NON_ISO); - priv->can.bittiming_const = &m_can_bittiming_const_30X; - priv->can.data_bittiming_const = - &m_can_data_bittiming_const_30X; + m_can_dev->can.bittiming_const = m_can_dev->bit_timing ? + m_can_dev->bit_timing : &m_can_bittiming_const_30X; + + m_can_dev->can.data_bittiming_const = m_can_dev->data_timing ? + m_can_dev->data_timing : + &m_can_data_bittiming_const_30X; break; case 31: /* CAN_CTRLMODE_FD_NON_ISO is fixed with M_CAN IP v3.1.x */ can_set_static_ctrlmode(dev, CAN_CTRLMODE_FD_NON_ISO); - priv->can.bittiming_const = &m_can_bittiming_const_31X; - priv->can.data_bittiming_const = - &m_can_data_bittiming_const_31X; + m_can_dev->can.bittiming_const = m_can_dev->bit_timing ? + m_can_dev->bit_timing : &m_can_bittiming_const_31X; + + m_can_dev->can.data_bittiming_const = m_can_dev->data_timing ? + m_can_dev->data_timing : + &m_can_data_bittiming_const_31X; break; case 32: - priv->can.bittiming_const = &m_can_bittiming_const_31X; - priv->can.data_bittiming_const = - &m_can_data_bittiming_const_31X; - priv->can.ctrlmode_supported |= (m_can_niso_supported(priv) + m_can_dev->can.bittiming_const = m_can_dev->bit_timing ? + m_can_dev->bit_timing : &m_can_bittiming_const_31X; + + m_can_dev->can.data_bittiming_const = m_can_dev->data_timing ? + m_can_dev->data_timing : + &m_can_data_bittiming_const_31X; + + m_can_dev->can.ctrlmode_supported |= + (m_can_niso_supported(m_can_dev) ? CAN_CTRLMODE_FD_NON_ISO : 0); break; default: - dev_err(&pdev->dev, "Unsupported version number: %2d", - priv->version); + dev_err(m_can_dev->dev, "Unsupported version number: %2d", + m_can_dev->version); return -EINVAL; } - return 0; -} - -static int m_can_open(struct net_device *dev) -{ - struct m_can_priv *priv = netdev_priv(dev); - int err; - - err = m_can_clk_start(priv); - if (err) - return err; - - /* open the can device */ - err = open_candev(dev); - if (err) { - netdev_err(dev, "failed to open can device\n"); - goto exit_disable_clks; - } - - /* register interrupt handler */ - err = request_irq(dev->irq, m_can_isr, IRQF_SHARED, dev->name, - dev); - if (err < 0) { - netdev_err(dev, "failed to request interrupt\n"); - goto exit_irq_fail; - } - - /* start the m_can controller */ - m_can_start(dev); - - can_led_event(dev, CAN_LED_EVENT_OPEN); - napi_enable(&priv->napi); - netif_start_queue(dev); + if (m_can_dev->ops->init) + m_can_dev->ops->init(m_can_dev); return 0; - -exit_irq_fail: - close_candev(dev); -exit_disable_clks: - m_can_clk_stop(priv); - return err; } static void m_can_stop(struct net_device *dev) @@ -1361,10 +1347,18 @@ static int m_can_close(struct net_device *dev) struct m_can_priv *priv = netdev_priv(dev); netif_stop_queue(dev); - napi_disable(&priv->napi); + if (!priv->is_peripherial) + napi_disable(&priv->napi); m_can_stop(dev); m_can_clk_stop(priv); free_irq(dev->irq, dev); + + if (priv->is_peripherial) { + priv->tx_skb = NULL; + destroy_workqueue(priv->tx_wq); + priv->tx_wq = NULL; + } + close_candev(dev); can_led_event(dev, CAN_LED_EVENT_STOP); @@ -1385,18 +1379,15 @@ static int m_can_next_echo_skb_occupied(struct net_device *dev, int putidx) return !!priv->can.echo_skb[next_idx]; } -static netdev_tx_t m_can_start_xmit(struct sk_buff *skb, - struct net_device *dev) +static netdev_tx_t m_can_tx_handler(struct m_can_priv *priv) { - struct m_can_priv *priv = netdev_priv(dev); - struct canfd_frame *cf = (struct canfd_frame *)skb->data; + struct canfd_frame *cf = (struct canfd_frame *)priv->tx_skb->data; + struct net_device *dev = priv->net; + struct sk_buff *skb = priv->tx_skb; u32 id, cccr, fdflags; int i; int putidx; - if (can_dropped_invalid_skb(dev, skb)) - return NETDEV_TX_OK; - /* Generate ID field for TX buffer Element */ /* Common to all supported M_CAN versions */ if (cf->can_id & CAN_EFF_FLAG) { @@ -1492,14 +1483,113 @@ static netdev_tx_t m_can_start_xmit(struct sk_buff *skb, m_can_write(priv, M_CAN_TXBAR, (1 << putidx)); /* stop network queue if fifo full */ - if (m_can_tx_fifo_full(priv) || - m_can_next_echo_skb_occupied(dev, putidx)) - netif_stop_queue(dev); + if (m_can_tx_fifo_full(priv) || + m_can_next_echo_skb_occupied(dev, putidx)) + netif_stop_queue(dev); + } + + return NETDEV_TX_OK; +} + +static void m_can_tx_work_queue(struct work_struct *ws) +{ + struct m_can_priv *priv = container_of(ws, struct m_can_priv, + tx_work); + netdev_tx_t ret; + + ret = m_can_tx_handler(priv); + if (ret == NETDEV_TX_OK) + priv->tx_skb = NULL; +} + +static netdev_tx_t m_can_start_xmit(struct sk_buff *skb, + struct net_device *dev) +{ + struct m_can_priv *priv = netdev_priv(dev); + + if (can_dropped_invalid_skb(dev, skb)) + return NETDEV_TX_OK; + + if (priv->is_peripherial) { + if (priv->tx_skb) { + netdev_err(dev, "hard_xmit called while tx busy\n"); + return NETDEV_TX_BUSY; + } + + priv->tx_skb = skb; + netif_stop_queue(priv->net); + queue_work(priv->tx_wq, &priv->tx_work); + } else { + priv->tx_skb = skb; + return m_can_tx_handler(priv); } return NETDEV_TX_OK; } +static int m_can_open(struct net_device *dev) +{ + struct m_can_priv *priv = netdev_priv(dev); + int err; + + err = m_can_clk_start(priv); + if (err) + return err; + + /* open the can device */ + err = open_candev(dev); + if (err) { + netdev_err(dev, "failed to open can device\n"); + goto exit_disable_clks; + } + + /* register interrupt handler */ + if (priv->is_peripherial) { + priv->tx_skb = NULL; + priv->tx_wq = alloc_workqueue("mcan_wq", + WQ_FREEZABLE | WQ_MEM_RECLAIM, 0); + if (!priv->tx_wq) { + err = -ENOMEM; + goto out_wq_fail; + } + + INIT_WORK(&priv->tx_work, m_can_tx_work_queue); + + err = request_threaded_irq(dev->irq, NULL, m_can_isr, + IRQF_ONESHOT | IRQF_TRIGGER_FALLING, + dev->name, dev); + } else { + err = request_irq(dev->irq, m_can_isr, IRQF_SHARED, dev->name, + dev); + } + + if (err < 0) { + netdev_err(dev, "failed to request interrupt\n"); + goto exit_irq_fail; + } + + /* start the m_can controller */ + m_can_start(dev); + + can_led_event(dev, CAN_LED_EVENT_OPEN); + + if (!priv->is_peripherial) + napi_enable(&priv->napi); + + netif_start_queue(dev); + + return 0; + +exit_irq_fail: + if (priv->is_peripherial) + destroy_workqueue(priv->tx_wq); +out_wq_fail: + close_candev(dev); +exit_disable_clks: + m_can_clk_stop(priv); + return err; +} + static const struct net_device_ops m_can_netdev_ops = { .ndo_open = m_can_open, .ndo_stop = m_can_close, @@ -1515,20 +1605,6 @@ static int register_m_can_dev(struct net_device *dev) return register_candev(dev); } -static void m_can_init_ram(struct m_can_priv *priv) -{ - int end, i, start; - - /* initialize the entire Message RAM in use to avoid possible - * ECC/parity checksum errors when reading an uninitialized buffer - */ - start = priv->mcfg[MRAM_SIDF].off; - end = priv->mcfg[MRAM_TXB].off + - priv->mcfg[MRAM_TXB].num * TXB_ELEMENT_SIZE; - for (i = start; i < end; i += 4) - writel(0x0, priv->mram_base + i); -} - static void m_can_of_parse_mram(struct m_can_priv *priv, const u32 *mram_config_vals) { @@ -1556,9 +1632,8 @@ static void m_can_of_parse_mram(struct m_can_priv *priv, priv->mcfg[MRAM_TXB].num = mram_config_vals[7] & (TXBC_NDTB_MASK >> TXBC_NDTB_SHIFT); - dev_dbg(priv->device, - "mram_base %p sidf 0x%x %d xidf 0x%x %d rxf0 0x%x %d rxf1 0x%x %d rxb 0x%x %d txe 0x%x %d txb 0x%x %d\n", - priv->mram_base, + dev_dbg(priv->dev, + "sidf 0x%x %d xidf 0x%x %d rxf0 0x%x %d rxf1 0x%x %d rxb 0x%x %d txe 0x%x %d txb 0x%x %d\n", priv->mcfg[MRAM_SIDF].off, priv->mcfg[MRAM_SIDF].num, priv->mcfg[MRAM_XIDF].off, priv->mcfg[MRAM_XIDF].num, priv->mcfg[MRAM_RXF0].off, priv->mcfg[MRAM_RXF0].num, @@ -1566,63 +1641,55 @@ static void m_can_of_parse_mram(struct m_can_priv *priv, priv->mcfg[MRAM_RXB].off, priv->mcfg[MRAM_RXB].num, priv->mcfg[MRAM_TXE].off, priv->mcfg[MRAM_TXE].num, priv->mcfg[MRAM_TXB].off, priv->mcfg[MRAM_TXB].num); - - m_can_init_ram(priv); } -static int m_can_plat_probe(struct platform_device *pdev) +void m_can_init_ram(struct m_can_priv *priv) { - struct net_device *dev; - struct m_can_priv *priv; - struct resource *res; - void __iomem *addr; - void __iomem *mram_addr; - struct clk *hclk, *cclk; - int irq, ret; - struct device_node *np; - u32 mram_config_vals[MRAM_CFG_LEN]; - u32 tx_fifo_size; - - np = pdev->dev.of_node; + int end, i, start; - hclk = devm_clk_get(&pdev->dev, "hclk"); - cclk = devm_clk_get(&pdev->dev, "cclk"); + /* initialize the entire Message RAM in use to avoid possible + * ECC/parity checksum errors when reading an uninitialized buffer + */ + start = priv->mcfg[MRAM_SIDF].off; + end = priv->mcfg[MRAM_TXB].off + + priv->mcfg[MRAM_TXB].num * TXB_ELEMENT_SIZE; - if (IS_ERR(hclk) || IS_ERR(cclk)) { - dev_err(&pdev->dev, "no clock found\n"); - ret = -ENODEV; - goto failed_ret; - } + for (i = start; i < end; i += 4) + m_can_fifo_write_no_off(priv, i, 0x0); +} +EXPORT_SYMBOL_GPL(m_can_init_ram); - res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "m_can"); - addr = devm_ioremap_resource(&pdev->dev, res); - irq = platform_get_irq_byname(pdev, "int0"); +int m_can_class_get_clocks(struct m_can_priv *m_can_dev) +{ + int ret = 0; - if (IS_ERR(addr) || irq < 0) { - ret = -EINVAL; - goto failed_ret; - } + m_can_dev->hclk = devm_clk_get(m_can_dev->dev, "hclk"); + m_can_dev->cclk = devm_clk_get(m_can_dev->dev, "cclk"); - /* message ram could be shared */ - res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "message_ram"); - if (!res) { + if (IS_ERR(m_can_dev->cclk)) { + dev_err(m_can_dev->dev, "no clock found\n"); ret = -ENODEV; - goto failed_ret; } - mram_addr = devm_ioremap(&pdev->dev, res->start, resource_size(res)); - if (!mram_addr) { - ret = -ENOMEM; - goto failed_ret; - } + return ret; +} +EXPORT_SYMBOL_GPL(m_can_class_get_clocks); - /* get message ram configuration */ - ret = of_property_read_u32_array(np, "bosch,mram-cfg", - mram_config_vals, - sizeof(mram_config_vals) / 4); +struct m_can_priv *m_can_class_allocate_dev(struct device *dev) +{ + struct m_can_priv *class_dev = NULL; + u32 mram_config_vals[MRAM_CFG_LEN]; + struct net_device *net_dev; + u32 tx_fifo_size; + int ret; + + ret = fwnode_property_read_u32_array(dev_fwnode(dev), + "bosch,mram-cfg", + mram_config_vals, + sizeof(mram_config_vals) / 4); if (ret) { - dev_err(&pdev->dev, "Could not get Message RAM configuration."); - goto failed_ret; + dev_err(dev, "Could not get Message RAM configuration."); + goto out; } /* Get TX FIFO size @@ -1631,66 +1698,74 @@ static int m_can_plat_probe(struct platform_device *pdev) tx_fifo_size = mram_config_vals[7]; /* allocate the m_can device */ - dev = alloc_candev(sizeof(*priv), tx_fifo_size); - if (!dev) { - ret = -ENOMEM; - goto failed_ret; + net_dev = alloc_candev(sizeof(*class_dev), tx_fifo_size); + if (!net_dev) { + dev_err(dev, "Failed to allocate CAN device"); + goto out; } - priv = netdev_priv(dev); - dev->irq = irq; - priv->device = &pdev->dev; - priv->hclk = hclk; - priv->cclk = cclk; - priv->can.clock.freq = clk_get_rate(cclk); - priv->mram_base = mram_addr; + class_dev = netdev_priv(net_dev); + if (!class_dev) { + dev_err(dev, "Failed to init netdev private"); + goto out; + } - platform_set_drvdata(pdev, dev); - SET_NETDEV_DEV(dev, &pdev->dev); + class_dev->net = net_dev; + class_dev->dev = dev; + SET_NETDEV_DEV(net_dev, dev); - /* Enable clocks. Necessary to read Core Release in order to determine - * M_CAN version - */ - pm_runtime_enable(&pdev->dev); - ret = m_can_clk_start(priv); - if (ret) - goto pm_runtime_fail; + m_can_of_parse_mram(class_dev, mram_config_vals); +out: + return class_dev; +} +EXPORT_SYMBOL_GPL(m_can_class_allocate_dev); + +int m_can_class_register(struct m_can_priv *m_can_dev) +{ + int ret; - ret = m_can_dev_setup(pdev, dev, addr); + if (m_can_dev->pm_clock_support) { + pm_runtime_enable(m_can_dev->dev); + ret = m_can_clk_start(m_can_dev); + if (ret) + goto pm_runtime_fail; + } + + ret = m_can_dev_setup(m_can_dev); if (ret) goto clk_disable; - ret = register_m_can_dev(dev); + ret = register_m_can_dev(m_can_dev->net); if (ret) { - dev_err(&pdev->dev, "registering %s failed (err=%d)\n", - KBUILD_MODNAME, ret); + dev_err(m_can_dev->dev, "registering %s failed (err=%d)\n", + m_can_dev->net->name, ret); goto clk_disable; } - m_can_of_parse_mram(priv, mram_config_vals); - - devm_can_led_init(dev); + devm_can_led_init(m_can_dev->net); - of_can_transceiver(dev); + of_can_transceiver(m_can_dev->net); - dev_info(&pdev->dev, "%s device registered (irq=%d, version=%d)\n", - KBUILD_MODNAME, dev->irq, priv->version); + dev_info(m_can_dev->dev, "%s device registered (irq=%d, version=%d)\n", + KBUILD_MODNAME, m_can_dev->net->irq, m_can_dev->version); /* Probe finished * Stop clocks. They will be reactivated once the M_CAN device is opened */ clk_disable: - m_can_clk_stop(priv); + m_can_clk_stop(m_can_dev); pm_runtime_fail: if (ret) { - pm_runtime_disable(&pdev->dev); - free_candev(dev); + if (m_can_dev->pm_clock_support) + pm_runtime_disable(m_can_dev->dev); + free_candev(m_can_dev->net); } -failed_ret: + return ret; } +EXPORT_SYMBOL_GPL(m_can_class_register); -static __maybe_unused int m_can_suspend(struct device *dev) +int m_can_class_suspend(struct device *dev) { struct net_device *ndev = dev_get_drvdata(dev); struct m_can_priv *priv = netdev_priv(ndev); @@ -1708,8 +1783,9 @@ static __maybe_unused int m_can_suspend(struct device *dev) return 0; } +EXPORT_SYMBOL_GPL(m_can_class_suspend); -static __maybe_unused int m_can_resume(struct device *dev) +int m_can_class_resume(struct device *dev) { struct net_device *ndev = dev_get_drvdata(dev); struct m_can_priv *priv = netdev_priv(ndev); @@ -1733,79 +1809,19 @@ static __maybe_unused int m_can_resume(struct device *dev) return 0; } +EXPORT_SYMBOL_GPL(m_can_class_resume); -static void unregister_m_can_dev(struct net_device *dev) +void m_can_class_unregister(struct m_can_priv *m_can_dev) { - unregister_candev(dev); -} + unregister_candev(m_can_dev->net); -static int m_can_plat_remove(struct platform_device *pdev) -{ - struct net_device *dev = platform_get_drvdata(pdev); + m_can_clk_stop(m_can_dev); - unregister_m_can_dev(dev); - - pm_runtime_disable(&pdev->dev); - - platform_set_drvdata(pdev, NULL); - - free_candev(dev); - - return 0; -} - -static int __maybe_unused m_can_runtime_suspend(struct device *dev) -{ - struct net_device *ndev = dev_get_drvdata(dev); - struct m_can_priv *priv = netdev_priv(ndev); - - clk_disable_unprepare(priv->cclk); - clk_disable_unprepare(priv->hclk); - - return 0; -} - -static int __maybe_unused m_can_runtime_resume(struct device *dev) -{ - struct net_device *ndev = dev_get_drvdata(dev); - struct m_can_priv *priv = netdev_priv(ndev); - int err; - - err = clk_prepare_enable(priv->hclk); - if (err) - return err; - - err = clk_prepare_enable(priv->cclk); - if (err) - clk_disable_unprepare(priv->hclk); - - return err; + free_candev(m_can_dev->net); } - -static const struct dev_pm_ops m_can_pmops = { - SET_RUNTIME_PM_OPS(m_can_runtime_suspend, - m_can_runtime_resume, NULL) - SET_SYSTEM_SLEEP_PM_OPS(m_can_suspend, m_can_resume) -}; - -static const struct of_device_id m_can_of_table[] = { - { .compatible = "bosch,m_can", .data = NULL }, - { /* sentinel */ }, -}; -MODULE_DEVICE_TABLE(of, m_can_of_table); - -static struct platform_driver m_can_plat_driver = { - .driver = { - .name = KBUILD_MODNAME, - .of_match_table = m_can_of_table, - .pm = &m_can_pmops, - }, - .probe = m_can_plat_probe, - .remove = m_can_plat_remove, -}; - -module_platform_driver(m_can_plat_driver); +EXPORT_SYMBOL_GPL(m_can_class_unregister); MODULE_AUTHOR("Dong Aisheng "); +MODULE_AUTHOR("Dan Murphy "); MODULE_LICENSE("GPL v2"); MODULE_DESCRIPTION("CAN bus driver for Bosch M_CAN controller"); diff --git a/drivers/net/can/m_can/m_can.h b/drivers/net/can/m_can/m_can.h new file mode 100644 index 000000000000..b60f27dd9f33 --- /dev/null +++ b/drivers/net/can/m_can/m_can.h @@ -0,0 +1,110 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +/* CAN bus driver for Bosch M_CAN controller + * Copyright (C) 2018 Texas Instruments Incorporated - http://www.ti.com/ + */ + +#ifndef _CAN_M_CAN_H_ +#define _CAN_M_CAN_H_ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +/* m_can lec values */ +enum m_can_lec_type { + LEC_NO_ERROR = 0, + LEC_STUFF_ERROR, + LEC_FORM_ERROR, + LEC_ACK_ERROR, + LEC_BIT1_ERROR, + LEC_BIT0_ERROR, + LEC_CRC_ERROR, + LEC_UNUSED, +}; + +enum m_can_mram_cfg { + MRAM_SIDF = 0, + MRAM_XIDF, + MRAM_RXF0, + MRAM_RXF1, + MRAM_RXB, + MRAM_TXE, + MRAM_TXB, + MRAM_CFG_NUM, +}; + +/* address offset and element number for each FIFO/Buffer in the Message RAM */ +struct mram_cfg { + u16 off; + u8 num; +}; + +struct m_can_priv; +struct m_can_ops { + /* Device specific call backs */ + int (*clear_interrupts)(struct m_can_priv *m_can_class); + u32 (*read_reg)(struct m_can_priv *m_can_class, int reg); + int (*write_reg)(struct m_can_priv *m_can_class, int reg, int val); + u32 (*read_fifo)(struct m_can_priv *m_can_class, int addr_offset); + int (*write_fifo)(struct m_can_priv *m_can_class, int addr_offset, + int val); + int (*init)(struct m_can_priv *m_can_class); +}; + +struct m_can_priv { + struct can_priv can; + struct napi_struct napi; + struct net_device *net; + struct device *dev; + struct clk *hclk; + struct clk *cclk; + + struct workqueue_struct *tx_wq; + struct work_struct tx_work; + struct sk_buff *tx_skb; + + struct can_bittiming_const *bit_timing; + struct can_bittiming_const *data_timing; + + struct m_can_ops *ops; + + void *device_data; + + int version; + int freq; + u32 irqstatus; + + int pm_clock_support; + int is_peripherial; + + struct mram_cfg mcfg[MRAM_CFG_NUM]; +}; + +struct m_can_priv *m_can_class_allocate_dev(struct device *dev); +int m_can_class_register(struct m_can_priv *m_can_dev); +void m_can_class_unregister(struct m_can_priv *m_can_dev); +int m_can_class_get_clocks(struct m_can_priv *m_can_dev); +void m_can_init_ram(struct m_can_priv *priv); +void m_can_config_endisable(struct m_can_priv *priv, bool enable); + +int m_can_class_suspend(struct device *dev); +int m_can_class_resume(struct device *dev); +#endif /* _CAN_M_H_ */ diff --git a/drivers/net/can/m_can/m_can_platform.c b/drivers/net/can/m_can/m_can_platform.c new file mode 100644 index 000000000000..b02d49f9ee4c --- /dev/null +++ b/drivers/net/can/m_can/m_can_platform.c @@ -0,0 +1,202 @@ +// SPDX-License-Identifier: GPL-2.0 +// IOMapped CAN bus driver for Bosch M_CAN controller +// Copyright (C) 2014 Freescale Semiconductor, Inc. +// Dong Aisheng +// +// Copyright (C) 2018-19 Texas Instruments Incorporated - http://www.ti.com/ + +#include + +#include "m_can.h" + +struct m_can_plat_priv { + void __iomem *base; + void __iomem *mram_base; +}; + +static u32 iomap_read_reg(struct m_can_priv *cdev, int reg) +{ + struct m_can_plat_priv *priv = + (struct m_can_plat_priv *)cdev->device_data; + + return readl(priv->base + reg); +} + +static u32 iomap_read_fifo(struct m_can_priv *cdev, int offset) +{ + struct m_can_plat_priv *priv = + (struct m_can_plat_priv *)cdev->device_data; + + return readl(priv->mram_base + offset); +} + +static int iomap_write_reg(struct m_can_priv *cdev, int reg, int val) +{ + struct m_can_plat_priv *priv = + (struct m_can_plat_priv *)cdev->device_data; + + writel(val, priv->base + reg); + + return 0; +} + +static int iomap_write_fifo(struct m_can_priv *cdev, int offset, int val) +{ + struct m_can_plat_priv *priv = + (struct m_can_plat_priv *)cdev->device_data; + + writel(val, priv->mram_base + offset); + + return 0; +} + +static struct m_can_ops m_can_plat_ops = { + .read_reg = iomap_read_reg, + .write_reg = iomap_write_reg, + .write_fifo = iomap_write_fifo, + .read_fifo = iomap_read_fifo, +}; + +static int m_can_plat_probe(struct platform_device *pdev) +{ + struct m_can_priv *mcan_class; + struct m_can_plat_priv *priv; + struct resource *res; + void __iomem *addr; + void __iomem *mram_addr; + int irq, ret = 0; + + mcan_class = m_can_class_allocate_dev(&pdev->dev); + priv = devm_kzalloc(&pdev->dev, sizeof(*priv), GFP_KERNEL); + if (!priv) + return -ENOMEM; + + mcan_class->device_data = priv; + + m_can_class_get_clocks(mcan_class); + + res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "m_can"); + addr = devm_ioremap_resource(&pdev->dev, res); + irq = platform_get_irq_byname(pdev, "int0"); + if (IS_ERR(addr) || irq < 0) { + ret = -EINVAL; + goto failed_ret; + } + + /* message ram could be shared */ + res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "message_ram"); + if (!res) { + ret = -ENODEV; + goto failed_ret; + } + + mram_addr = devm_ioremap(&pdev->dev, res->start, resource_size(res)); + if (!mram_addr) { + ret = -ENOMEM; + goto failed_ret; + } + + priv->base = addr; + priv->mram_base = mram_addr; + + mcan_class->net->irq = irq; + mcan_class->pm_clock_support = 1; + mcan_class->can.clock.freq = clk_get_rate(mcan_class->cclk); + mcan_class->dev = &pdev->dev; + + mcan_class->ops = &m_can_plat_ops; + + mcan_class->is_peripherial = false; + + platform_set_drvdata(pdev, mcan_class->dev); + + m_can_init_ram(mcan_class); + + ret = m_can_class_register(mcan_class); + +failed_ret: + return ret; +} + +static __maybe_unused int m_can_suspend(struct device *dev) +{ + return m_can_class_suspend(dev); +} + +static __maybe_unused int m_can_resume(struct device *dev) +{ + return m_can_class_resume(dev); +} + +static int m_can_plat_remove(struct platform_device *pdev) +{ + struct net_device *dev = platform_get_drvdata(pdev); + struct m_can_priv *mcan_class = netdev_priv(dev); + + m_can_class_unregister(mcan_class); + + platform_set_drvdata(pdev, NULL); + + return 0; +} + +static int __maybe_unused m_can_runtime_suspend(struct device *dev) +{ + struct net_device *ndev = dev_get_drvdata(dev); + struct m_can_priv *mcan_class = netdev_priv(ndev); + + m_can_class_suspend(dev); + + clk_disable_unprepare(mcan_class->cclk); + clk_disable_unprepare(mcan_class->hclk); + + return 0; +} + +static int __maybe_unused m_can_runtime_resume(struct device *dev) +{ + struct net_device *ndev = dev_get_drvdata(dev); + struct m_can_priv *mcan_class = netdev_priv(ndev); + int err; + + err = clk_prepare_enable(mcan_class->hclk); + if (err) + return err; + + err = clk_prepare_enable(mcan_class->cclk); + if (err) + clk_disable_unprepare(mcan_class->hclk); + + m_can_class_resume(dev); + + return err; +} + +static const struct dev_pm_ops m_can_pmops = { + SET_RUNTIME_PM_OPS(m_can_runtime_suspend, + m_can_runtime_resume, NULL) + SET_SYSTEM_SLEEP_PM_OPS(m_can_suspend, m_can_resume) +}; + +static const struct of_device_id m_can_of_table[] = { + { .compatible = "bosch,m_can", .data = NULL }, + { /* sentinel */ }, +}; +MODULE_DEVICE_TABLE(of, m_can_of_table); + +static struct platform_driver m_can_plat_driver = { + .driver = { + .name = KBUILD_MODNAME, + .of_match_table = m_can_of_table, + .pm = &m_can_pmops, + }, + .probe = m_can_plat_probe, + .remove = m_can_plat_remove, +}; + +module_platform_driver(m_can_plat_driver); + +MODULE_AUTHOR("Dong Aisheng "); +MODULE_AUTHOR("Dan Murphy "); +MODULE_LICENSE("GPL v2"); +MODULE_DESCRIPTION("M_CAN driver for IO Mapped Bosch controllers"); From patchwork Tue Mar 5 15:52:18 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Dan Murphy X-Patchwork-Id: 159666 Delivered-To: patch@linaro.org Received: by 2002:a02:5cc1:0:0:0:0:0 with SMTP id w62csp5119124jad; Tue, 5 Mar 2019 07:52:52 -0800 (PST) X-Google-Smtp-Source: APXvYqwNkI/KrMBW2QGpAj7V17yE1lEawWMpJewcOjLJddknjac/bQ6C3a2lk0mhvLhxwdoiEmhf X-Received: by 2002:a63:2a86:: with SMTP id q128mr1947524pgq.424.1551801172377; Tue, 05 Mar 2019 07:52:52 -0800 (PST) ARC-Seal: i=1; a=rsa-sha256; t=1551801172; cv=none; d=google.com; s=arc-20160816; b=vtcLMIF/5ohcM1bd9ECEkHtYjmhN10iUldNJ2LTzVvnJ3+gViQf+8JHItgGKrqLMUp EfAgj/3acPNn6IZ2u4NOl9wJmmnluD9+QKfgTQRY9e+cnocjvMP0zp5psliMhl42NKY1 vdplHS2nMWhsqWXBcSiBJtaqfRpN31FpGns1zfdiqc9lKBntWW/rD2AUygDCHlxSl7oz OYt2IKzUu5rgV3aYyPfhlvCRyDA1bpmAA18TRkZ3UB08/1glkAY8lJNWddZmnsqzICfV 5I+oXLQ2bpLFdx2BMT1y73yz1DC0jJYW8BbkjnSWew14lzAefNEv2Fw80Pg1kGdamGA7 dbmw== ARC-Message-Signature: i=1; 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[209.132.180.67]) by mx.google.com with ESMTP id e13si7874537pgu.102.2019.03.05.07.52.52; Tue, 05 Mar 2019 07:52:52 -0800 (PST) Received-SPF: pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) client-ip=209.132.180.67; Authentication-Results: mx.google.com; dkim=pass header.i=@ti.com header.s=ti-com-17Q1 header.b=NYeNB2HS; spf=pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=pass (p=QUARANTINE sp=NONE dis=NONE) header.from=ti.com Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726250AbfCEPwt (ORCPT + 31 others); Tue, 5 Mar 2019 10:52:49 -0500 Received: from fllv0016.ext.ti.com ([198.47.19.142]:51888 "EHLO fllv0016.ext.ti.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727775AbfCEPws (ORCPT ); Tue, 5 Mar 2019 10:52:48 -0500 Received: from fllv0034.itg.ti.com ([10.64.40.246]) by fllv0016.ext.ti.com (8.15.2/8.15.2) with ESMTP id x25Fqcw1042447; Tue, 5 Mar 2019 09:52:38 -0600 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=ti.com; s=ti-com-17Q1; t=1551801158; bh=3xheFp0nrtSZl+sr04D5TCZSpplp5b19OWFHBuxU4YQ=; h=From:To:CC:Subject:Date:In-Reply-To:References; b=NYeNB2HSltcpzd1XVlIq4VjCjzeYhXmBCG2zr8U6ov8wa1OOaNgoFTHDKwGLTAmms VQ8pSTY4bjc5k1ytjqr0kB2uESIMBMV7xCBpmcTo9UkLOnQgycV+TrXgucgSfPTby6 BFOTf4JV2yVix4ZUH3Mo/gy2ZvckjGr3F2UgWvuk= Received: from DLEE115.ent.ti.com (dlee115.ent.ti.com [157.170.170.26]) by fllv0034.itg.ti.com (8.15.2/8.15.2) with ESMTPS id x25FqcFT023677 (version=TLSv1.2 cipher=AES256-GCM-SHA384 bits=256 verify=FAIL); Tue, 5 Mar 2019 09:52:38 -0600 Received: from DLEE107.ent.ti.com (157.170.170.37) by DLEE115.ent.ti.com (157.170.170.26) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256_P256) id 15.1.1591.10; Tue, 5 Mar 2019 09:52:37 -0600 Received: from dflp33.itg.ti.com (10.64.6.16) by DLEE107.ent.ti.com (157.170.170.37) with Microsoft SMTP Server (version=TLS1_0, cipher=TLS_RSA_WITH_AES_256_CBC_SHA) id 15.1.1591.10 via Frontend Transport; Tue, 5 Mar 2019 09:52:37 -0600 Received: from legion.dal.desgin.ti.com (legion.dal.design.ti.com [128.247.22.53]) by dflp33.itg.ti.com (8.14.3/8.13.8) with ESMTP id x25Fqbvf021017; Tue, 5 Mar 2019 09:52:37 -0600 Received: from localhost (a0272616local-lt.dhcp.ti.com [172.22.71.209]) by legion.dal.desgin.ti.com (8.11.7p1+Sun/8.11.7) with ESMTP id x25FqaU00521; Tue, 5 Mar 2019 09:52:36 -0600 (CST) From: Dan Murphy To: , , CC: , , , Dan Murphy Subject: [PATCH v7 2/4] can: m_can: Rename m_can_priv to m_can_classdev Date: Tue, 5 Mar 2019 09:52:18 -0600 Message-ID: <20190305155220.14037-2-dmurphy@ti.com> X-Mailer: git-send-email 2.12.2 In-Reply-To: <20190305155220.14037-1-dmurphy@ti.com> References: <20190305155220.14037-1-dmurphy@ti.com> MIME-Version: 1.0 X-EXCLAIMER-MD-CONFIG: e1e8a2fd-e40a-4ac6-ac9b-f7e9cc9ee180 Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Rename the common m_can_priv class structure to m_can_classdev as this is more descriptive. Signed-off-by: Dan Murphy --- v7 - Fixed remaining checkpatch issues, renamed priv to cdev - https://lore.kernel.org/patchwork/patch/1047219/ v6 - No changes only rebase changes possibly can squash into the first patch - https://lore.kernel.org/patchwork/patch/1042444/ drivers/net/can/m_can/m_can.c | 524 ++++++++++++------------- drivers/net/can/m_can/m_can.h | 28 +- drivers/net/can/m_can/m_can_platform.c | 16 +- 3 files changed, 284 insertions(+), 284 deletions(-) -- 2.20.1.390.gb5101f9297 diff --git a/drivers/net/can/m_can/m_can.c b/drivers/net/can/m_can/m_can.c index a60278d94126..6666356afc7a 100644 --- a/drivers/net/can/m_can/m_can.c +++ b/drivers/net/can/m_can/m_can.c @@ -320,94 +320,94 @@ enum m_can_reg { #define TX_EVENT_MM_SHIFT TX_BUF_MM_SHIFT #define TX_EVENT_MM_MASK (0xff << TX_EVENT_MM_SHIFT) -static u32 m_can_read(struct m_can_priv *priv, enum m_can_reg reg) +static u32 m_can_read(struct m_can_classdev *cdev, enum m_can_reg reg) { - if (priv->ops->read_reg) - return priv->ops->read_reg(priv, reg); + if (cdev->ops->read_reg) + return cdev->ops->read_reg(cdev, reg); else return -EINVAL; } -static int m_can_write(struct m_can_priv *priv, enum m_can_reg reg, u32 val) +static int m_can_write(struct m_can_classdev *cdev, enum m_can_reg reg, u32 val) { - if (priv->ops->write_reg) - return priv->ops->write_reg(priv, reg, val); + if (cdev->ops->write_reg) + return cdev->ops->write_reg(cdev, reg, val); else return -EINVAL; } -static u32 m_can_fifo_read(struct m_can_priv *priv, +static u32 m_can_fifo_read(struct m_can_classdev *cdev, u32 fgi, unsigned int offset) { - u32 addr_offset = priv->mcfg[MRAM_RXF0].off + fgi * RXF0_ELEMENT_SIZE + + u32 addr_offset = cdev->mcfg[MRAM_RXF0].off + fgi * RXF0_ELEMENT_SIZE + offset; - if (priv->ops->read_fifo) - return priv->ops->read_fifo(priv, addr_offset); + if (cdev->ops->read_fifo) + return cdev->ops->read_fifo(cdev, addr_offset); else return -EINVAL; } -static u32 m_can_fifo_write(struct m_can_priv *priv, +static u32 m_can_fifo_write(struct m_can_classdev *cdev, u32 fpi, unsigned int offset, u32 val) { - u32 addr_offset = priv->mcfg[MRAM_TXB].off + fpi * TXB_ELEMENT_SIZE + + u32 addr_offset = cdev->mcfg[MRAM_TXB].off + fpi * TXB_ELEMENT_SIZE + offset; - if (priv->ops->write_fifo) - return priv->ops->write_fifo(priv, addr_offset, val); + if (cdev->ops->write_fifo) + return cdev->ops->write_fifo(cdev, addr_offset, val); else return -EINVAL; } -static u32 m_can_fifo_write_no_off(struct m_can_priv *priv, +static u32 m_can_fifo_write_no_off(struct m_can_classdev *cdev, u32 fpi, u32 val) { - if (priv->ops->write_fifo) - return priv->ops->write_fifo(priv, fpi, val); + if (cdev->ops->write_fifo) + return cdev->ops->write_fifo(cdev, fpi, val); else return 0; } -static u32 m_can_txe_fifo_read(struct m_can_priv *priv, u32 fgi, u32 offset) +static u32 m_can_txe_fifo_read(struct m_can_classdev *cdev, u32 fgi, u32 offset) { - u32 addr_offset = priv->mcfg[MRAM_TXE].off + fgi * TXE_ELEMENT_SIZE + + u32 addr_offset = cdev->mcfg[MRAM_TXE].off + fgi * TXE_ELEMENT_SIZE + offset; - if (priv->ops->read_fifo) - return priv->ops->read_fifo(priv, addr_offset); + if (cdev->ops->read_fifo) + return cdev->ops->read_fifo(cdev, addr_offset); else return -EINVAL; } -static inline bool m_can_tx_fifo_full(struct m_can_priv *priv) +static inline bool m_can_tx_fifo_full(struct m_can_classdev *cdev) { - return !!(m_can_read(priv, M_CAN_TXFQS) & TXFQS_TFQF); + return !!(m_can_read(cdev, M_CAN_TXFQS) & TXFQS_TFQF); } -void m_can_config_endisable(struct m_can_priv *priv, bool enable) +void m_can_config_endisable(struct m_can_classdev *cdev, bool enable) { - u32 cccr = m_can_read(priv, M_CAN_CCCR); + u32 cccr = m_can_read(cdev, M_CAN_CCCR); u32 timeout = 10; u32 val = 0; if (enable) { /* enable m_can configuration */ - m_can_write(priv, M_CAN_CCCR, cccr | CCCR_INIT); + m_can_write(cdev, M_CAN_CCCR, cccr | CCCR_INIT); udelay(5); /* CCCR.CCE can only be set/reset while CCCR.INIT = '1' */ - m_can_write(priv, M_CAN_CCCR, cccr | CCCR_INIT | CCCR_CCE); + m_can_write(cdev, M_CAN_CCCR, cccr | CCCR_INIT | CCCR_CCE); } else { - m_can_write(priv, M_CAN_CCCR, cccr & ~(CCCR_INIT | CCCR_CCE)); + m_can_write(cdev, M_CAN_CCCR, cccr & ~(CCCR_INIT | CCCR_CCE)); } /* there's a delay for module initialization */ if (enable) val = CCCR_INIT | CCCR_CCE; - while ((m_can_read(priv, M_CAN_CCCR) & (CCCR_INIT | CCCR_CCE)) != val) { + while ((m_can_read(cdev, M_CAN_CCCR) & (CCCR_INIT | CCCR_CCE)) != val) { if (timeout == 0) { - netdev_warn(priv->net, "Failed to init module\n"); + netdev_warn(cdev->net, "Failed to init module\n"); return; } timeout--; @@ -415,21 +415,21 @@ void m_can_config_endisable(struct m_can_priv *priv, bool enable) } } -static inline void m_can_enable_all_interrupts(struct m_can_priv *priv) +static inline void m_can_enable_all_interrupts(struct m_can_classdev *cdev) { /* Only interrupt line 0 is used in this driver */ - m_can_write(priv, M_CAN_ILE, ILE_EINT0); + m_can_write(cdev, M_CAN_ILE, ILE_EINT0); } -static inline void m_can_disable_all_interrupts(struct m_can_priv *priv) +static inline void m_can_disable_all_interrupts(struct m_can_classdev *cdev) { - m_can_write(priv, M_CAN_ILE, 0x0); + m_can_write(cdev, M_CAN_ILE, 0x0); } static void m_can_read_fifo(struct net_device *dev, u32 rxfs) { struct net_device_stats *stats = &dev->stats; - struct m_can_priv *priv = netdev_priv(dev); + struct m_can_classdev *cdev = netdev_priv(dev); struct canfd_frame *cf; struct sk_buff *skb; u32 id, fgi, dlc; @@ -437,7 +437,7 @@ static void m_can_read_fifo(struct net_device *dev, u32 rxfs) /* calculate the fifo get index for where to read data */ fgi = (rxfs & RXFS_FGI_MASK) >> RXFS_FGI_SHIFT; - dlc = m_can_fifo_read(priv, fgi, M_CAN_FIFO_DLC); + dlc = m_can_fifo_read(cdev, fgi, M_CAN_FIFO_DLC); if (dlc & RX_BUF_FDF) skb = alloc_canfd_skb(dev, &cf); else @@ -452,7 +452,7 @@ static void m_can_read_fifo(struct net_device *dev, u32 rxfs) else cf->len = get_can_dlc((dlc >> 16) & 0x0F); - id = m_can_fifo_read(priv, fgi, M_CAN_FIFO_ID); + id = m_can_fifo_read(cdev, fgi, M_CAN_FIFO_ID); if (id & RX_BUF_XTD) cf->can_id = (id & CAN_EFF_MASK) | CAN_EFF_FLAG; else @@ -471,12 +471,12 @@ static void m_can_read_fifo(struct net_device *dev, u32 rxfs) for (i = 0; i < cf->len; i += 4) *(u32 *)(cf->data + i) = - m_can_fifo_read(priv, fgi, + m_can_fifo_read(cdev, fgi, M_CAN_FIFO_DATA(i / 4)); } /* acknowledge rx fifo 0 */ - m_can_write(priv, M_CAN_RXF0A, fgi); + m_can_write(cdev, M_CAN_RXF0A, fgi); stats->rx_packets++; stats->rx_bytes += cf->len; @@ -486,11 +486,11 @@ static void m_can_read_fifo(struct net_device *dev, u32 rxfs) static int m_can_do_rx_poll(struct net_device *dev, int quota) { - struct m_can_priv *priv = netdev_priv(dev); + struct m_can_classdev *cdev = netdev_priv(dev); u32 pkts = 0; u32 rxfs; - rxfs = m_can_read(priv, M_CAN_RXF0S); + rxfs = m_can_read(cdev, M_CAN_RXF0S); if (!(rxfs & RXFS_FFL_MASK)) { netdev_dbg(dev, "no messages in fifo0\n"); return 0; @@ -504,7 +504,7 @@ static int m_can_do_rx_poll(struct net_device *dev, int quota) quota--; pkts++; - rxfs = m_can_read(priv, M_CAN_RXF0S); + rxfs = m_can_read(cdev, M_CAN_RXF0S); } if (pkts) @@ -539,12 +539,12 @@ static int m_can_handle_lost_msg(struct net_device *dev) static int m_can_handle_lec_err(struct net_device *dev, enum m_can_lec_type lec_type) { - struct m_can_priv *priv = netdev_priv(dev); + struct m_can_classdev *cdev = netdev_priv(dev); struct net_device_stats *stats = &dev->stats; struct can_frame *cf; struct sk_buff *skb; - priv->can.can_stats.bus_error++; + cdev->can.can_stats.bus_error++; stats->rx_errors++; /* propagate the error condition to the CAN stack */ @@ -596,51 +596,51 @@ static int m_can_handle_lec_err(struct net_device *dev, static int __m_can_get_berr_counter(const struct net_device *dev, struct can_berr_counter *bec) { - struct m_can_priv *priv = netdev_priv(dev); + struct m_can_classdev *cdev = netdev_priv(dev); unsigned int ecr; - ecr = m_can_read(priv, M_CAN_ECR); + ecr = m_can_read(cdev, M_CAN_ECR); bec->rxerr = (ecr & ECR_REC_MASK) >> ECR_REC_SHIFT; bec->txerr = (ecr & ECR_TEC_MASK) >> ECR_TEC_SHIFT; return 0; } -static int m_can_clk_start(struct m_can_priv *priv) +static int m_can_clk_start(struct m_can_classdev *cdev) { int err; - if (priv->pm_clock_support == 0) + if (cdev->pm_clock_support == 0) return 0; - err = pm_runtime_get_sync(priv->dev); + err = pm_runtime_get_sync(cdev->dev); if (err < 0) { - pm_runtime_put_noidle(priv->dev); + pm_runtime_put_noidle(cdev->dev); return err; } return 0; } -static void m_can_clk_stop(struct m_can_priv *priv) +static void m_can_clk_stop(struct m_can_classdev *cdev) { - if (priv->pm_clock_support) - pm_runtime_put_sync(priv->dev); + if (cdev->pm_clock_support) + pm_runtime_put_sync(cdev->dev); } static int m_can_get_berr_counter(const struct net_device *dev, struct can_berr_counter *bec) { - struct m_can_priv *priv = netdev_priv(dev); + struct m_can_classdev *cdev = netdev_priv(dev); int err; - err = m_can_clk_start(priv); + err = m_can_clk_start(cdev); if (err) return err; __m_can_get_berr_counter(dev, bec); - m_can_clk_stop(priv); + m_can_clk_stop(cdev); return 0; } @@ -648,7 +648,7 @@ static int m_can_get_berr_counter(const struct net_device *dev, static int m_can_handle_state_change(struct net_device *dev, enum can_state new_state) { - struct m_can_priv *priv = netdev_priv(dev); + struct m_can_classdev *cdev = netdev_priv(dev); struct net_device_stats *stats = &dev->stats; struct can_frame *cf; struct sk_buff *skb; @@ -658,19 +658,19 @@ static int m_can_handle_state_change(struct net_device *dev, switch (new_state) { case CAN_STATE_ERROR_ACTIVE: /* error warning state */ - priv->can.can_stats.error_warning++; - priv->can.state = CAN_STATE_ERROR_WARNING; + cdev->can.can_stats.error_warning++; + cdev->can.state = CAN_STATE_ERROR_WARNING; break; case CAN_STATE_ERROR_PASSIVE: /* error passive state */ - priv->can.can_stats.error_passive++; - priv->can.state = CAN_STATE_ERROR_PASSIVE; + cdev->can.can_stats.error_passive++; + cdev->can.state = CAN_STATE_ERROR_PASSIVE; break; case CAN_STATE_BUS_OFF: /* bus-off state */ - priv->can.state = CAN_STATE_BUS_OFF; - m_can_disable_all_interrupts(priv); - priv->can.can_stats.bus_off++; + cdev->can.state = CAN_STATE_BUS_OFF; + m_can_disable_all_interrupts(cdev); + cdev->can.can_stats.bus_off++; can_bus_off(dev); break; default: @@ -697,7 +697,7 @@ static int m_can_handle_state_change(struct net_device *dev, case CAN_STATE_ERROR_PASSIVE: /* error passive state */ cf->can_id |= CAN_ERR_CRTL; - ecr = m_can_read(priv, M_CAN_ECR); + ecr = m_can_read(cdev, M_CAN_ECR); if (ecr & ECR_RP) cf->data[1] |= CAN_ERR_CRTL_RX_PASSIVE; if (bec.txerr > 127) @@ -722,25 +722,25 @@ static int m_can_handle_state_change(struct net_device *dev, static int m_can_handle_state_errors(struct net_device *dev, u32 psr) { - struct m_can_priv *priv = netdev_priv(dev); + struct m_can_classdev *cdev = netdev_priv(dev); int work_done = 0; if ((psr & PSR_EW) && - (priv->can.state != CAN_STATE_ERROR_WARNING)) { + (cdev->can.state != CAN_STATE_ERROR_WARNING)) { netdev_dbg(dev, "entered error warning state\n"); work_done += m_can_handle_state_change(dev, CAN_STATE_ERROR_WARNING); } if ((psr & PSR_EP) && - (priv->can.state != CAN_STATE_ERROR_PASSIVE)) { + (cdev->can.state != CAN_STATE_ERROR_PASSIVE)) { netdev_dbg(dev, "entered error passive state\n"); work_done += m_can_handle_state_change(dev, CAN_STATE_ERROR_PASSIVE); } if ((psr & PSR_BO) && - (priv->can.state != CAN_STATE_BUS_OFF)) { + (cdev->can.state != CAN_STATE_BUS_OFF)) { netdev_dbg(dev, "entered error bus off state\n"); work_done += m_can_handle_state_change(dev, CAN_STATE_BUS_OFF); @@ -775,14 +775,14 @@ static inline bool is_lec_err(u32 psr) static int m_can_handle_bus_errors(struct net_device *dev, u32 irqstatus, u32 psr) { - struct m_can_priv *priv = netdev_priv(dev); + struct m_can_classdev *cdev = netdev_priv(dev); int work_done = 0; if (irqstatus & IR_RF0L) work_done += m_can_handle_lost_msg(dev); /* handle lec errors on the bus */ - if ((priv->can.ctrlmode & CAN_CTRLMODE_BERR_REPORTING) && + if ((cdev->can.ctrlmode & CAN_CTRLMODE_BERR_REPORTING) && is_lec_err(psr)) work_done += m_can_handle_lec_err(dev, psr & LEC_UNUSED); @@ -794,15 +794,15 @@ static int m_can_handle_bus_errors(struct net_device *dev, u32 irqstatus, static int m_can_rx_handler(struct net_device *dev, int quota) { - struct m_can_priv *priv = netdev_priv(dev); + struct m_can_classdev *cdev = netdev_priv(dev); int work_done = 0; u32 irqstatus, psr; - irqstatus = priv->irqstatus | m_can_read(priv, M_CAN_IR); + irqstatus = cdev->irqstatus | m_can_read(cdev, M_CAN_IR); if (!irqstatus) goto end; - psr = m_can_read(priv, M_CAN_PSR); + psr = m_can_read(cdev, M_CAN_PSR); if (irqstatus & IR_ERR_STATE) work_done += m_can_handle_state_errors(dev, psr); @@ -817,11 +817,11 @@ static int m_can_rx_handler(struct net_device *dev, int quota) static int m_can_rx_peripherial(struct net_device *dev) { - struct m_can_priv *priv = netdev_priv(dev); + struct m_can_classdev *cdev = netdev_priv(dev); m_can_rx_handler(dev, 1); - m_can_enable_all_interrupts(priv); + m_can_enable_all_interrupts(cdev); return 0; } @@ -829,13 +829,13 @@ static int m_can_rx_peripherial(struct net_device *dev) static int m_can_poll(struct napi_struct *napi, int quota) { struct net_device *dev = napi->dev; - struct m_can_priv *priv = netdev_priv(dev); + struct m_can_classdev *cdev = netdev_priv(dev); int work_done; work_done = m_can_rx_handler(dev, quota); if (work_done < quota) { napi_complete_done(napi, work_done); - m_can_enable_all_interrupts(priv); + m_can_enable_all_interrupts(cdev); } return work_done; @@ -849,11 +849,11 @@ static void m_can_echo_tx_event(struct net_device *dev) int i = 0; unsigned int msg_mark; - struct m_can_priv *priv = netdev_priv(dev); + struct m_can_classdev *cdev = netdev_priv(dev); struct net_device_stats *stats = &dev->stats; /* read tx event fifo status */ - m_can_txefs = m_can_read(priv, M_CAN_TXEFS); + m_can_txefs = m_can_read(cdev, M_CAN_TXEFS); /* Get Tx Event fifo element count */ txe_count = (m_can_txefs & TXEFS_EFFL_MASK) @@ -862,15 +862,15 @@ static void m_can_echo_tx_event(struct net_device *dev) /* Get and process all sent elements */ for (i = 0; i < txe_count; i++) { /* retrieve get index */ - fgi = (m_can_read(priv, M_CAN_TXEFS) & TXEFS_EFGI_MASK) + fgi = (m_can_read(cdev, M_CAN_TXEFS) & TXEFS_EFGI_MASK) >> TXEFS_EFGI_SHIFT; /* get message marker */ - msg_mark = (m_can_txe_fifo_read(priv, fgi, 4) & + msg_mark = (m_can_txe_fifo_read(cdev, fgi, 4) & TX_EVENT_MM_MASK) >> TX_EVENT_MM_SHIFT; /* ack txe element */ - m_can_write(priv, M_CAN_TXEFA, (TXEFA_EFAI_MASK & + m_can_write(cdev, M_CAN_TXEFA, (TXEFA_EFAI_MASK & (fgi << TXEFA_EFAI_SHIFT))); /* update stats */ @@ -882,20 +882,20 @@ static void m_can_echo_tx_event(struct net_device *dev) static irqreturn_t m_can_isr(int irq, void *dev_id) { struct net_device *dev = (struct net_device *)dev_id; - struct m_can_priv *priv = netdev_priv(dev); + struct m_can_classdev *cdev = netdev_priv(dev); struct net_device_stats *stats = &dev->stats; u32 ir; - ir = m_can_read(priv, M_CAN_IR); + ir = m_can_read(cdev, M_CAN_IR); if (!ir) return IRQ_NONE; /* ACK all irqs */ if (ir & IR_ALL_INT) - m_can_write(priv, M_CAN_IR, ir); + m_can_write(cdev, M_CAN_IR, ir); - if (priv->ops->clear_interrupts) - priv->ops->clear_interrupts(priv); + if (cdev->ops->clear_interrupts) + cdev->ops->clear_interrupts(cdev); /* schedule NAPI in case of * - rx IRQ @@ -903,15 +903,15 @@ static irqreturn_t m_can_isr(int irq, void *dev_id) * - bus error IRQ and bus error reporting */ if ((ir & IR_RF0N) || (ir & IR_ERR_ALL_30X)) { - priv->irqstatus = ir; - m_can_disable_all_interrupts(priv); - if (!priv->is_peripherial) - napi_schedule(&priv->napi); + cdev->irqstatus = ir; + m_can_disable_all_interrupts(cdev); + if (!cdev->is_peripherial) + napi_schedule(&cdev->napi); else m_can_rx_peripherial(dev); } - if (priv->version == 30) { + if (cdev->version == 30) { if (ir & IR_TC) { /* Transmission Complete Interrupt*/ stats->tx_bytes += can_get_echo_skb(dev, 0); @@ -925,7 +925,7 @@ static irqreturn_t m_can_isr(int irq, void *dev_id) m_can_echo_tx_event(dev); can_led_event(dev, CAN_LED_EVENT_TX); if (netif_queue_stopped(dev) && - !m_can_tx_fifo_full(priv)) + !m_can_tx_fifo_full(cdev)) netif_wake_queue(dev); } } @@ -983,9 +983,9 @@ static const struct can_bittiming_const m_can_data_bittiming_const_31X = { static int m_can_set_bittiming(struct net_device *dev) { - struct m_can_priv *priv = netdev_priv(dev); - const struct can_bittiming *bt = &priv->can.bittiming; - const struct can_bittiming *dbt = &priv->can.data_bittiming; + struct m_can_classdev *cdev = netdev_priv(dev); + const struct can_bittiming *bt = &cdev->can.bittiming; + const struct can_bittiming *dbt = &cdev->can.data_bittiming; u16 brp, sjw, tseg1, tseg2; u32 reg_btp; @@ -995,9 +995,9 @@ static int m_can_set_bittiming(struct net_device *dev) tseg2 = bt->phase_seg2 - 1; reg_btp = (brp << NBTP_NBRP_SHIFT) | (sjw << NBTP_NSJW_SHIFT) | (tseg1 << NBTP_NTSEG1_SHIFT) | (tseg2 << NBTP_NTSEG2_SHIFT); - m_can_write(priv, M_CAN_NBTP, reg_btp); + m_can_write(cdev, M_CAN_NBTP, reg_btp); - if (priv->can.ctrlmode & CAN_CTRLMODE_FD) { + if (cdev->can.ctrlmode & CAN_CTRLMODE_FD) { reg_btp = 0; brp = dbt->brp - 1; sjw = dbt->sjw - 1; @@ -1019,7 +1019,7 @@ static int m_can_set_bittiming(struct net_device *dev) /* Equation based on Bosch's M_CAN User Manual's * Transmitter Delay Compensation Section */ - tdco = (priv->can.clock.freq / 1000) * + tdco = (cdev->can.clock.freq / 1000) * ssp / dbt->bitrate; /* Max valid TDCO value is 127 */ @@ -1030,7 +1030,7 @@ static int m_can_set_bittiming(struct net_device *dev) } reg_btp |= DBTP_TDC; - m_can_write(priv, M_CAN_TDCR, + m_can_write(cdev, M_CAN_TDCR, tdco << TDCR_TDCO_SHIFT); } @@ -1039,7 +1039,7 @@ static int m_can_set_bittiming(struct net_device *dev) (tseg1 << DBTP_DTSEG1_SHIFT) | (tseg2 << DBTP_DTSEG2_SHIFT); - m_can_write(priv, M_CAN_DBTP, reg_btp); + m_can_write(cdev, M_CAN_DBTP, reg_btp); } return 0; @@ -1056,63 +1056,63 @@ static int m_can_set_bittiming(struct net_device *dev) */ static void m_can_chip_config(struct net_device *dev) { - struct m_can_priv *priv = netdev_priv(dev); + struct m_can_classdev *cdev = netdev_priv(dev); u32 cccr, test; - m_can_config_endisable(priv, true); + m_can_config_endisable(cdev, true); /* RX Buffer/FIFO Element Size 64 bytes data field */ - m_can_write(priv, M_CAN_RXESC, M_CAN_RXESC_64BYTES); + m_can_write(cdev, M_CAN_RXESC, M_CAN_RXESC_64BYTES); /* Accept Non-matching Frames Into FIFO 0 */ - m_can_write(priv, M_CAN_GFC, 0x0); + m_can_write(cdev, M_CAN_GFC, 0x0); - if (priv->version == 30) { + if (cdev->version == 30) { /* only support one Tx Buffer currently */ - m_can_write(priv, M_CAN_TXBC, (1 << TXBC_NDTB_SHIFT) | - priv->mcfg[MRAM_TXB].off); + m_can_write(cdev, M_CAN_TXBC, (1 << TXBC_NDTB_SHIFT) | + cdev->mcfg[MRAM_TXB].off); } else { /* TX FIFO is used for newer IP Core versions */ - m_can_write(priv, M_CAN_TXBC, - (priv->mcfg[MRAM_TXB].num << TXBC_TFQS_SHIFT) | - (priv->mcfg[MRAM_TXB].off)); + m_can_write(cdev, M_CAN_TXBC, + (cdev->mcfg[MRAM_TXB].num << TXBC_TFQS_SHIFT) | + (cdev->mcfg[MRAM_TXB].off)); } /* support 64 bytes payload */ - m_can_write(priv, M_CAN_TXESC, TXESC_TBDS_64BYTES); + m_can_write(cdev, M_CAN_TXESC, TXESC_TBDS_64BYTES); /* TX Event FIFO */ - if (priv->version == 30) { - m_can_write(priv, M_CAN_TXEFC, (1 << TXEFC_EFS_SHIFT) | - priv->mcfg[MRAM_TXE].off); + if (cdev->version == 30) { + m_can_write(cdev, M_CAN_TXEFC, (1 << TXEFC_EFS_SHIFT) | + cdev->mcfg[MRAM_TXE].off); } else { /* Full TX Event FIFO is used */ - m_can_write(priv, M_CAN_TXEFC, - ((priv->mcfg[MRAM_TXE].num << TXEFC_EFS_SHIFT) + m_can_write(cdev, M_CAN_TXEFC, + ((cdev->mcfg[MRAM_TXE].num << TXEFC_EFS_SHIFT) & TXEFC_EFS_MASK) | - priv->mcfg[MRAM_TXE].off); + cdev->mcfg[MRAM_TXE].off); } /* rx fifo configuration, blocking mode, fifo size 1 */ - m_can_write(priv, M_CAN_RXF0C, - (priv->mcfg[MRAM_RXF0].num << RXFC_FS_SHIFT) | - priv->mcfg[MRAM_RXF0].off); + m_can_write(cdev, M_CAN_RXF0C, + (cdev->mcfg[MRAM_RXF0].num << RXFC_FS_SHIFT) | + cdev->mcfg[MRAM_RXF0].off); - m_can_write(priv, M_CAN_RXF1C, - (priv->mcfg[MRAM_RXF1].num << RXFC_FS_SHIFT) | - priv->mcfg[MRAM_RXF1].off); + m_can_write(cdev, M_CAN_RXF1C, + (cdev->mcfg[MRAM_RXF1].num << RXFC_FS_SHIFT) | + cdev->mcfg[MRAM_RXF1].off); - cccr = m_can_read(priv, M_CAN_CCCR); - test = m_can_read(priv, M_CAN_TEST); + cccr = m_can_read(cdev, M_CAN_CCCR); + test = m_can_read(cdev, M_CAN_TEST); test &= ~TEST_LBCK; - if (priv->version == 30) { + if (cdev->version == 30) { /* Version 3.0.x */ cccr &= ~(CCCR_TEST | CCCR_MON | (CCCR_CMR_MASK << CCCR_CMR_SHIFT) | (CCCR_CME_MASK << CCCR_CME_SHIFT)); - if (priv->can.ctrlmode & CAN_CTRLMODE_FD) + if (cdev->can.ctrlmode & CAN_CTRLMODE_FD) cccr |= CCCR_CME_CANFD_BRS << CCCR_CME_SHIFT; } else { @@ -1121,61 +1121,61 @@ static void m_can_chip_config(struct net_device *dev) CCCR_NISO); /* Only 3.2.x has NISO Bit implemented */ - if (priv->can.ctrlmode & CAN_CTRLMODE_FD_NON_ISO) + if (cdev->can.ctrlmode & CAN_CTRLMODE_FD_NON_ISO) cccr |= CCCR_NISO; - if (priv->can.ctrlmode & CAN_CTRLMODE_FD) + if (cdev->can.ctrlmode & CAN_CTRLMODE_FD) cccr |= (CCCR_BRSE | CCCR_FDOE); } /* Loopback Mode */ - if (priv->can.ctrlmode & CAN_CTRLMODE_LOOPBACK) { + if (cdev->can.ctrlmode & CAN_CTRLMODE_LOOPBACK) { cccr |= CCCR_TEST | CCCR_MON; test |= TEST_LBCK; } /* Enable Monitoring (all versions) */ - if (priv->can.ctrlmode & CAN_CTRLMODE_LISTENONLY) + if (cdev->can.ctrlmode & CAN_CTRLMODE_LISTENONLY) cccr |= CCCR_MON; /* Write config */ - m_can_write(priv, M_CAN_CCCR, cccr); - m_can_write(priv, M_CAN_TEST, test); + m_can_write(cdev, M_CAN_CCCR, cccr); + m_can_write(cdev, M_CAN_TEST, test); /* Enable interrupts */ - m_can_write(priv, M_CAN_IR, IR_ALL_INT); - if (!(priv->can.ctrlmode & CAN_CTRLMODE_BERR_REPORTING)) - if (priv->version == 30) - m_can_write(priv, M_CAN_IE, IR_ALL_INT & + m_can_write(cdev, M_CAN_IR, IR_ALL_INT); + if (!(cdev->can.ctrlmode & CAN_CTRLMODE_BERR_REPORTING)) + if (cdev->version == 30) + m_can_write(cdev, M_CAN_IE, IR_ALL_INT & ~(IR_ERR_LEC_30X)); else - m_can_write(priv, M_CAN_IE, IR_ALL_INT & + m_can_write(cdev, M_CAN_IE, IR_ALL_INT & ~(IR_ERR_LEC_31X)); else - m_can_write(priv, M_CAN_IE, IR_ALL_INT); + m_can_write(cdev, M_CAN_IE, IR_ALL_INT); /* route all interrupts to INT0 */ - m_can_write(priv, M_CAN_ILS, ILS_ALL_INT0); + m_can_write(cdev, M_CAN_ILS, ILS_ALL_INT0); /* set bittiming params */ m_can_set_bittiming(dev); - m_can_config_endisable(priv, false); + m_can_config_endisable(cdev, false); - if (priv->ops->init) - priv->ops->init(priv); + if (cdev->ops->init) + cdev->ops->init(cdev); } static void m_can_start(struct net_device *dev) { - struct m_can_priv *priv = netdev_priv(dev); + struct m_can_classdev *cdev = netdev_priv(dev); /* basic m_can configuration */ m_can_chip_config(dev); - priv->can.state = CAN_STATE_ERROR_ACTIVE; + cdev->can.state = CAN_STATE_ERROR_ACTIVE; - m_can_enable_all_interrupts(priv); + m_can_enable_all_interrupts(cdev); } static int m_can_set_mode(struct net_device *dev, enum can_mode mode) @@ -1197,7 +1197,7 @@ static int m_can_set_mode(struct net_device *dev, enum can_mode mode) * else it returns the release and step coded as: * return value = 10 * + 1 * */ -static int m_can_check_core_release(struct m_can_priv *priv) +static int m_can_check_core_release(struct m_can_classdev *cdev) { u32 crel_reg; u8 rel; @@ -1207,7 +1207,7 @@ static int m_can_check_core_release(struct m_can_priv *priv) /* Read Core Release Version and split into version number * Example: Version 3.2.1 => rel = 3; step = 2; substep = 1; */ - crel_reg = m_can_read(priv, M_CAN_CREL); + crel_reg = m_can_read(cdev, M_CAN_CREL); rel = (u8)((crel_reg & CREL_REL_MASK) >> CREL_REL_SHIFT); step = (u8)((crel_reg & CREL_STEP_MASK) >> CREL_STEP_SHIFT); @@ -1225,19 +1225,19 @@ static int m_can_check_core_release(struct m_can_priv *priv) /* Selectable Non ISO support only in version 3.2.x * This function checks if the bit is writable. */ -static bool m_can_niso_supported(struct m_can_priv *priv) +static bool m_can_niso_supported(struct m_can_classdev *cdev) { u32 cccr_reg, cccr_poll = 0; int niso_timeout = -ETIMEDOUT; int i; - m_can_config_endisable(priv, true); - cccr_reg = m_can_read(priv, M_CAN_CCCR); + m_can_config_endisable(cdev, true); + cccr_reg = m_can_read(cdev, M_CAN_CCCR); cccr_reg |= CCCR_NISO; - m_can_write(priv, M_CAN_CCCR, cccr_reg); + m_can_write(cdev, M_CAN_CCCR, cccr_reg); for (i = 0; i <= 10; i++) { - cccr_poll = m_can_read(priv, M_CAN_CCCR); + cccr_poll = m_can_read(cdev, M_CAN_CCCR); if (cccr_poll == cccr_reg) { niso_timeout = 0; break; @@ -1248,15 +1248,15 @@ static bool m_can_niso_supported(struct m_can_priv *priv) /* Clear NISO */ cccr_reg &= ~(CCCR_NISO); - m_can_write(priv, M_CAN_CCCR, cccr_reg); + m_can_write(cdev, M_CAN_CCCR, cccr_reg); - m_can_config_endisable(priv, false); + m_can_config_endisable(cdev, false); /* return false if time out (-ETIMEDOUT), else return true */ return !niso_timeout; } -static int m_can_dev_setup(struct m_can_priv *m_can_dev) +static int m_can_dev_setup(struct m_can_classdev *m_can_dev) { struct net_device *dev = m_can_dev->net; int m_can_version; @@ -1333,30 +1333,30 @@ static int m_can_dev_setup(struct m_can_priv *m_can_dev) static void m_can_stop(struct net_device *dev) { - struct m_can_priv *priv = netdev_priv(dev); + struct m_can_classdev *cdev = netdev_priv(dev); /* disable all interrupts */ - m_can_disable_all_interrupts(priv); + m_can_disable_all_interrupts(cdev); /* set the state as STOPPED */ - priv->can.state = CAN_STATE_STOPPED; + cdev->can.state = CAN_STATE_STOPPED; } static int m_can_close(struct net_device *dev) { - struct m_can_priv *priv = netdev_priv(dev); + struct m_can_classdev *cdev = netdev_priv(dev); netif_stop_queue(dev); - if (!priv->is_peripherial) - napi_disable(&priv->napi); + if (!cdev->is_peripherial) + napi_disable(&cdev->napi); m_can_stop(dev); - m_can_clk_stop(priv); + m_can_clk_stop(cdev); free_irq(dev->irq, dev); - if (priv->is_peripherial) { - priv->tx_skb = NULL; - destroy_workqueue(priv->tx_wq); - priv->tx_wq = NULL; + if (cdev->is_peripherial) { + cdev->tx_skb = NULL; + destroy_workqueue(cdev->tx_wq); + cdev->tx_wq = NULL; } close_candev(dev); @@ -1367,23 +1367,23 @@ static int m_can_close(struct net_device *dev) static int m_can_next_echo_skb_occupied(struct net_device *dev, int putidx) { - struct m_can_priv *priv = netdev_priv(dev); + struct m_can_classdev *cdev = netdev_priv(dev); /*get wrap around for loopback skb index */ - unsigned int wrap = priv->can.echo_skb_max; + unsigned int wrap = cdev->can.echo_skb_max; int next_idx; /* calculate next index */ next_idx = (++putidx >= wrap ? 0 : putidx); /* check if occupied */ - return !!priv->can.echo_skb[next_idx]; + return !!cdev->can.echo_skb[next_idx]; } -static netdev_tx_t m_can_tx_handler(struct m_can_priv *priv) +static netdev_tx_t m_can_tx_handler(struct m_can_classdev *cdev) { - struct canfd_frame *cf = (struct canfd_frame *)priv->tx_skb->data; - struct net_device *dev = priv->net; - struct sk_buff *skb = priv->tx_skb; + struct canfd_frame *cf = (struct canfd_frame *)cdev->tx_skb->data; + struct net_device *dev = cdev->net; + struct sk_buff *skb = cdev->tx_skb; u32 id, cccr, fdflags; int i; int putidx; @@ -1400,23 +1400,23 @@ static netdev_tx_t m_can_tx_handler(struct m_can_priv *priv) if (cf->can_id & CAN_RTR_FLAG) id |= TX_BUF_RTR; - if (priv->version == 30) { + if (cdev->version == 30) { netif_stop_queue(dev); /* message ram configuration */ - m_can_fifo_write(priv, 0, M_CAN_FIFO_ID, id); - m_can_fifo_write(priv, 0, M_CAN_FIFO_DLC, + m_can_fifo_write(cdev, 0, M_CAN_FIFO_ID, id); + m_can_fifo_write(cdev, 0, M_CAN_FIFO_DLC, can_len2dlc(cf->len) << 16); for (i = 0; i < cf->len; i += 4) - m_can_fifo_write(priv, 0, + m_can_fifo_write(cdev, 0, M_CAN_FIFO_DATA(i / 4), *(u32 *)(cf->data + i)); can_put_echo_skb(skb, dev, 0); - if (priv->can.ctrlmode & CAN_CTRLMODE_FD) { - cccr = m_can_read(priv, M_CAN_CCCR); + if (cdev->can.ctrlmode & CAN_CTRLMODE_FD) { + cccr = m_can_read(cdev, M_CAN_CCCR); cccr &= ~(CCCR_CMR_MASK << CCCR_CMR_SHIFT); if (can_is_canfd_skb(skb)) { if (cf->flags & CANFD_BRS) @@ -1428,16 +1428,16 @@ static netdev_tx_t m_can_tx_handler(struct m_can_priv *priv) } else { cccr |= CCCR_CMR_CAN << CCCR_CMR_SHIFT; } - m_can_write(priv, M_CAN_CCCR, cccr); + m_can_write(cdev, M_CAN_CCCR, cccr); } - m_can_write(priv, M_CAN_TXBTIE, 0x1); - m_can_write(priv, M_CAN_TXBAR, 0x1); + m_can_write(cdev, M_CAN_TXBTIE, 0x1); + m_can_write(cdev, M_CAN_TXBAR, 0x1); /* End of xmit function for version 3.0.x */ } else { /* Transmit routine for version >= v3.1.x */ /* Check if FIFO full */ - if (m_can_tx_fifo_full(priv)) { + if (m_can_tx_fifo_full(cdev)) { /* This shouldn't happen */ netif_stop_queue(dev); netdev_warn(dev, @@ -1446,10 +1446,10 @@ static netdev_tx_t m_can_tx_handler(struct m_can_priv *priv) } /* get put index for frame */ - putidx = ((m_can_read(priv, M_CAN_TXFQS) & TXFQS_TFQPI_MASK) + putidx = ((m_can_read(cdev, M_CAN_TXFQS) & TXFQS_TFQPI_MASK) >> TXFQS_TFQPI_SHIFT); /* Write ID Field to FIFO Element */ - m_can_fifo_write(priv, putidx, M_CAN_FIFO_ID, id); + m_can_fifo_write(cdev, putidx, M_CAN_FIFO_ID, id); /* get CAN FD configuration of frame */ fdflags = 0; @@ -1464,14 +1464,14 @@ static netdev_tx_t m_can_tx_handler(struct m_can_priv *priv) * it is used in TX interrupt for * sending the correct echo frame */ - m_can_fifo_write(priv, putidx, M_CAN_FIFO_DLC, + m_can_fifo_write(cdev, putidx, M_CAN_FIFO_DLC, ((putidx << TX_BUF_MM_SHIFT) & TX_BUF_MM_MASK) | (can_len2dlc(cf->len) << 16) | fdflags | TX_BUF_EFC); for (i = 0; i < cf->len; i += 4) - m_can_fifo_write(priv, putidx, M_CAN_FIFO_DATA(i / 4), + m_can_fifo_write(cdev, putidx, M_CAN_FIFO_DATA(i / 4), *(u32 *)(cf->data + i)); /* Push loopback echo. @@ -1480,10 +1480,10 @@ static netdev_tx_t m_can_tx_handler(struct m_can_priv *priv) can_put_echo_skb(skb, dev, putidx); /* Enable TX FIFO element to start transfer */ - m_can_write(priv, M_CAN_TXBAR, (1 << putidx)); + m_can_write(cdev, M_CAN_TXBAR, (1 << putidx)); /* stop network queue if fifo full */ - if (m_can_tx_fifo_full(priv) || + if (m_can_tx_fifo_full(cdev) || m_can_next_echo_skb_occupied(dev, putidx)) netif_stop_queue(dev); } @@ -1493,35 +1493,35 @@ static netdev_tx_t m_can_tx_handler(struct m_can_priv *priv) static void m_can_tx_work_queue(struct work_struct *ws) { - struct m_can_priv *priv = container_of(ws, struct m_can_priv, + struct m_can_classdev *cdev = container_of(ws, struct m_can_classdev, tx_work); netdev_tx_t ret; - ret = m_can_tx_handler(priv); + ret = m_can_tx_handler(cdev); if (ret == NETDEV_TX_OK) - priv->tx_skb = NULL; + cdev->tx_skb = NULL; } static netdev_tx_t m_can_start_xmit(struct sk_buff *skb, struct net_device *dev) { - struct m_can_priv *priv = netdev_priv(dev); + struct m_can_classdev *cdev = netdev_priv(dev); if (can_dropped_invalid_skb(dev, skb)) return NETDEV_TX_OK; - if (priv->is_peripherial) { - if (priv->tx_skb) { + if (cdev->is_peripherial) { + if (cdev->tx_skb) { netdev_err(dev, "hard_xmit called while tx busy\n"); return NETDEV_TX_BUSY; } - priv->tx_skb = skb; - netif_stop_queue(priv->net); - queue_work(priv->tx_wq, &priv->tx_work); + cdev->tx_skb = skb; + netif_stop_queue(cdev->net); + queue_work(cdev->tx_wq, &cdev->tx_work); } else { - priv->tx_skb = skb; - return m_can_tx_handler(priv); + cdev->tx_skb = skb; + return m_can_tx_handler(cdev); } return NETDEV_TX_OK; @@ -1529,10 +1529,10 @@ static netdev_tx_t m_can_start_xmit(struct sk_buff *skb, static int m_can_open(struct net_device *dev) { - struct m_can_priv *priv = netdev_priv(dev); + struct m_can_classdev *cdev = netdev_priv(dev); int err; - err = m_can_clk_start(priv); + err = m_can_clk_start(cdev); if (err) return err; @@ -1544,16 +1544,16 @@ static int m_can_open(struct net_device *dev) } /* register interrupt handler */ - if (priv->is_peripherial) { - priv->tx_skb = NULL; - priv->tx_wq = alloc_workqueue("mcan_wq", + if (cdev->is_peripherial) { + cdev->tx_skb = NULL; + cdev->tx_wq = alloc_workqueue("mcan_wq", WQ_FREEZABLE | WQ_MEM_RECLAIM, 0); - if (!priv->tx_wq) { + if (!cdev->tx_wq) { err = -ENOMEM; goto out_wq_fail; } - INIT_WORK(&priv->tx_work, m_can_tx_work_queue); + INIT_WORK(&cdev->tx_work, m_can_tx_work_queue); err = request_threaded_irq(dev->irq, NULL, m_can_isr, IRQF_ONESHOT | IRQF_TRIGGER_FALLING, @@ -1573,20 +1573,20 @@ static int m_can_open(struct net_device *dev) can_led_event(dev, CAN_LED_EVENT_OPEN); - if (!priv->is_peripherial) - napi_enable(&priv->napi); + if (!cdev->is_peripherial) + napi_enable(&cdev->napi); netif_start_queue(dev); return 0; exit_irq_fail: - if (priv->is_peripherial) - destroy_workqueue(priv->tx_wq); + if (cdev->is_peripherial) + destroy_workqueue(cdev->tx_wq); out_wq_fail: close_candev(dev); exit_disable_clks: - m_can_clk_stop(priv); + m_can_clk_stop(cdev); return err; } @@ -1605,61 +1605,61 @@ static int register_m_can_dev(struct net_device *dev) return register_candev(dev); } -static void m_can_of_parse_mram(struct m_can_priv *priv, +static void m_can_of_parse_mram(struct m_can_classdev *cdev, const u32 *mram_config_vals) { - priv->mcfg[MRAM_SIDF].off = mram_config_vals[0]; - priv->mcfg[MRAM_SIDF].num = mram_config_vals[1]; - priv->mcfg[MRAM_XIDF].off = priv->mcfg[MRAM_SIDF].off + - priv->mcfg[MRAM_SIDF].num * SIDF_ELEMENT_SIZE; - priv->mcfg[MRAM_XIDF].num = mram_config_vals[2]; - priv->mcfg[MRAM_RXF0].off = priv->mcfg[MRAM_XIDF].off + - priv->mcfg[MRAM_XIDF].num * XIDF_ELEMENT_SIZE; - priv->mcfg[MRAM_RXF0].num = mram_config_vals[3] & + cdev->mcfg[MRAM_SIDF].off = mram_config_vals[0]; + cdev->mcfg[MRAM_SIDF].num = mram_config_vals[1]; + cdev->mcfg[MRAM_XIDF].off = cdev->mcfg[MRAM_SIDF].off + + cdev->mcfg[MRAM_SIDF].num * SIDF_ELEMENT_SIZE; + cdev->mcfg[MRAM_XIDF].num = mram_config_vals[2]; + cdev->mcfg[MRAM_RXF0].off = cdev->mcfg[MRAM_XIDF].off + + cdev->mcfg[MRAM_XIDF].num * XIDF_ELEMENT_SIZE; + cdev->mcfg[MRAM_RXF0].num = mram_config_vals[3] & (RXFC_FS_MASK >> RXFC_FS_SHIFT); - priv->mcfg[MRAM_RXF1].off = priv->mcfg[MRAM_RXF0].off + - priv->mcfg[MRAM_RXF0].num * RXF0_ELEMENT_SIZE; - priv->mcfg[MRAM_RXF1].num = mram_config_vals[4] & + cdev->mcfg[MRAM_RXF1].off = cdev->mcfg[MRAM_RXF0].off + + cdev->mcfg[MRAM_RXF0].num * RXF0_ELEMENT_SIZE; + cdev->mcfg[MRAM_RXF1].num = mram_config_vals[4] & (RXFC_FS_MASK >> RXFC_FS_SHIFT); - priv->mcfg[MRAM_RXB].off = priv->mcfg[MRAM_RXF1].off + - priv->mcfg[MRAM_RXF1].num * RXF1_ELEMENT_SIZE; - priv->mcfg[MRAM_RXB].num = mram_config_vals[5]; - priv->mcfg[MRAM_TXE].off = priv->mcfg[MRAM_RXB].off + - priv->mcfg[MRAM_RXB].num * RXB_ELEMENT_SIZE; - priv->mcfg[MRAM_TXE].num = mram_config_vals[6]; - priv->mcfg[MRAM_TXB].off = priv->mcfg[MRAM_TXE].off + - priv->mcfg[MRAM_TXE].num * TXE_ELEMENT_SIZE; - priv->mcfg[MRAM_TXB].num = mram_config_vals[7] & + cdev->mcfg[MRAM_RXB].off = cdev->mcfg[MRAM_RXF1].off + + cdev->mcfg[MRAM_RXF1].num * RXF1_ELEMENT_SIZE; + cdev->mcfg[MRAM_RXB].num = mram_config_vals[5]; + cdev->mcfg[MRAM_TXE].off = cdev->mcfg[MRAM_RXB].off + + cdev->mcfg[MRAM_RXB].num * RXB_ELEMENT_SIZE; + cdev->mcfg[MRAM_TXE].num = mram_config_vals[6]; + cdev->mcfg[MRAM_TXB].off = cdev->mcfg[MRAM_TXE].off + + cdev->mcfg[MRAM_TXE].num * TXE_ELEMENT_SIZE; + cdev->mcfg[MRAM_TXB].num = mram_config_vals[7] & (TXBC_NDTB_MASK >> TXBC_NDTB_SHIFT); - dev_dbg(priv->dev, + dev_dbg(cdev->dev, "sidf 0x%x %d xidf 0x%x %d rxf0 0x%x %d rxf1 0x%x %d rxb 0x%x %d txe 0x%x %d txb 0x%x %d\n", - priv->mcfg[MRAM_SIDF].off, priv->mcfg[MRAM_SIDF].num, - priv->mcfg[MRAM_XIDF].off, priv->mcfg[MRAM_XIDF].num, - priv->mcfg[MRAM_RXF0].off, priv->mcfg[MRAM_RXF0].num, - priv->mcfg[MRAM_RXF1].off, priv->mcfg[MRAM_RXF1].num, - priv->mcfg[MRAM_RXB].off, priv->mcfg[MRAM_RXB].num, - priv->mcfg[MRAM_TXE].off, priv->mcfg[MRAM_TXE].num, - priv->mcfg[MRAM_TXB].off, priv->mcfg[MRAM_TXB].num); + cdev->mcfg[MRAM_SIDF].off, cdev->mcfg[MRAM_SIDF].num, + cdev->mcfg[MRAM_XIDF].off, cdev->mcfg[MRAM_XIDF].num, + cdev->mcfg[MRAM_RXF0].off, cdev->mcfg[MRAM_RXF0].num, + cdev->mcfg[MRAM_RXF1].off, cdev->mcfg[MRAM_RXF1].num, + cdev->mcfg[MRAM_RXB].off, cdev->mcfg[MRAM_RXB].num, + cdev->mcfg[MRAM_TXE].off, cdev->mcfg[MRAM_TXE].num, + cdev->mcfg[MRAM_TXB].off, cdev->mcfg[MRAM_TXB].num); } -void m_can_init_ram(struct m_can_priv *priv) +void m_can_init_ram(struct m_can_classdev *cdev) { int end, i, start; /* initialize the entire Message RAM in use to avoid possible * ECC/parity checksum errors when reading an uninitialized buffer */ - start = priv->mcfg[MRAM_SIDF].off; - end = priv->mcfg[MRAM_TXB].off + - priv->mcfg[MRAM_TXB].num * TXB_ELEMENT_SIZE; + start = cdev->mcfg[MRAM_SIDF].off; + end = cdev->mcfg[MRAM_TXB].off + + cdev->mcfg[MRAM_TXB].num * TXB_ELEMENT_SIZE; for (i = start; i < end; i += 4) - m_can_fifo_write_no_off(priv, i, 0x0); + m_can_fifo_write_no_off(cdev, i, 0x0); } EXPORT_SYMBOL_GPL(m_can_init_ram); -int m_can_class_get_clocks(struct m_can_priv *m_can_dev) +int m_can_class_get_clocks(struct m_can_classdev *m_can_dev) { int ret = 0; @@ -1675,9 +1675,9 @@ int m_can_class_get_clocks(struct m_can_priv *m_can_dev) } EXPORT_SYMBOL_GPL(m_can_class_get_clocks); -struct m_can_priv *m_can_class_allocate_dev(struct device *dev) +struct m_can_classdev *m_can_class_allocate_dev(struct device *dev) { - struct m_can_priv *class_dev = NULL; + struct m_can_classdev *class_dev = NULL; u32 mram_config_vals[MRAM_CFG_LEN]; struct net_device *net_dev; u32 tx_fifo_size; @@ -1706,7 +1706,7 @@ struct m_can_priv *m_can_class_allocate_dev(struct device *dev) class_dev = netdev_priv(net_dev); if (!class_dev) { - dev_err(dev, "Failed to init netdev private"); + dev_err(dev, "Failed to init netdev cdevate"); goto out; } @@ -1720,7 +1720,7 @@ struct m_can_priv *m_can_class_allocate_dev(struct device *dev) } EXPORT_SYMBOL_GPL(m_can_class_allocate_dev); -int m_can_class_register(struct m_can_priv *m_can_dev) +int m_can_class_register(struct m_can_classdev *m_can_dev) { int ret; @@ -1768,18 +1768,18 @@ EXPORT_SYMBOL_GPL(m_can_class_register); int m_can_class_suspend(struct device *dev) { struct net_device *ndev = dev_get_drvdata(dev); - struct m_can_priv *priv = netdev_priv(ndev); + struct m_can_classdev *cdev = netdev_priv(ndev); if (netif_running(ndev)) { netif_stop_queue(ndev); netif_device_detach(ndev); m_can_stop(ndev); - m_can_clk_stop(priv); + m_can_clk_stop(cdev); } pinctrl_pm_select_sleep_state(dev); - priv->can.state = CAN_STATE_SLEEPING; + cdev->can.state = CAN_STATE_SLEEPING; return 0; } @@ -1788,20 +1788,20 @@ EXPORT_SYMBOL_GPL(m_can_class_suspend); int m_can_class_resume(struct device *dev) { struct net_device *ndev = dev_get_drvdata(dev); - struct m_can_priv *priv = netdev_priv(ndev); + struct m_can_classdev *cdev = netdev_priv(ndev); pinctrl_pm_select_default_state(dev); - priv->can.state = CAN_STATE_ERROR_ACTIVE; + cdev->can.state = CAN_STATE_ERROR_ACTIVE; if (netif_running(ndev)) { int ret; - ret = m_can_clk_start(priv); + ret = m_can_clk_start(cdev); if (ret) return ret; - m_can_init_ram(priv); + m_can_init_ram(cdev); m_can_start(ndev); netif_device_attach(ndev); netif_start_queue(ndev); @@ -1811,7 +1811,7 @@ int m_can_class_resume(struct device *dev) } EXPORT_SYMBOL_GPL(m_can_class_resume); -void m_can_class_unregister(struct m_can_priv *m_can_dev) +void m_can_class_unregister(struct m_can_classdev *m_can_dev) { unregister_candev(m_can_dev->net); diff --git a/drivers/net/can/m_can/m_can.h b/drivers/net/can/m_can/m_can.h index b60f27dd9f33..1299cc747194 100644 --- a/drivers/net/can/m_can/m_can.h +++ b/drivers/net/can/m_can/m_can.h @@ -57,19 +57,19 @@ struct mram_cfg { u8 num; }; -struct m_can_priv; +struct m_can_classdev; struct m_can_ops { /* Device specific call backs */ - int (*clear_interrupts)(struct m_can_priv *m_can_class); - u32 (*read_reg)(struct m_can_priv *m_can_class, int reg); - int (*write_reg)(struct m_can_priv *m_can_class, int reg, int val); - u32 (*read_fifo)(struct m_can_priv *m_can_class, int addr_offset); - int (*write_fifo)(struct m_can_priv *m_can_class, int addr_offset, + int (*clear_interrupts)(struct m_can_classdev *m_can_class); + u32 (*read_reg)(struct m_can_classdev *m_can_class, int reg); + int (*write_reg)(struct m_can_classdev *m_can_class, int reg, int val); + u32 (*read_fifo)(struct m_can_classdev *m_can_class, int addr_offset); + int (*write_fifo)(struct m_can_classdev *m_can_class, int addr_offset, int val); - int (*init)(struct m_can_priv *m_can_class); + int (*init)(struct m_can_classdev *m_can_class); }; -struct m_can_priv { +struct m_can_classdev { struct can_priv can; struct napi_struct napi; struct net_device *net; @@ -98,12 +98,12 @@ struct m_can_priv { struct mram_cfg mcfg[MRAM_CFG_NUM]; }; -struct m_can_priv *m_can_class_allocate_dev(struct device *dev); -int m_can_class_register(struct m_can_priv *m_can_dev); -void m_can_class_unregister(struct m_can_priv *m_can_dev); -int m_can_class_get_clocks(struct m_can_priv *m_can_dev); -void m_can_init_ram(struct m_can_priv *priv); -void m_can_config_endisable(struct m_can_priv *priv, bool enable); +struct m_can_classdev *m_can_class_allocate_dev(struct device *dev); +int m_can_class_register(struct m_can_classdev *m_can_dev); +void m_can_class_unregister(struct m_can_classdev *m_can_dev); +int m_can_class_get_clocks(struct m_can_classdev *m_can_dev); +void m_can_init_ram(struct m_can_classdev *priv); +void m_can_config_endisable(struct m_can_classdev *priv, bool enable); int m_can_class_suspend(struct device *dev); int m_can_class_resume(struct device *dev); diff --git a/drivers/net/can/m_can/m_can_platform.c b/drivers/net/can/m_can/m_can_platform.c index b02d49f9ee4c..601be42b9a4b 100644 --- a/drivers/net/can/m_can/m_can_platform.c +++ b/drivers/net/can/m_can/m_can_platform.c @@ -14,7 +14,7 @@ struct m_can_plat_priv { void __iomem *mram_base; }; -static u32 iomap_read_reg(struct m_can_priv *cdev, int reg) +static u32 iomap_read_reg(struct m_can_classdev *cdev, int reg) { struct m_can_plat_priv *priv = (struct m_can_plat_priv *)cdev->device_data; @@ -22,7 +22,7 @@ static u32 iomap_read_reg(struct m_can_priv *cdev, int reg) return readl(priv->base + reg); } -static u32 iomap_read_fifo(struct m_can_priv *cdev, int offset) +static u32 iomap_read_fifo(struct m_can_classdev *cdev, int offset) { struct m_can_plat_priv *priv = (struct m_can_plat_priv *)cdev->device_data; @@ -30,7 +30,7 @@ static u32 iomap_read_fifo(struct m_can_priv *cdev, int offset) return readl(priv->mram_base + offset); } -static int iomap_write_reg(struct m_can_priv *cdev, int reg, int val) +static int iomap_write_reg(struct m_can_classdev *cdev, int reg, int val) { struct m_can_plat_priv *priv = (struct m_can_plat_priv *)cdev->device_data; @@ -40,7 +40,7 @@ static int iomap_write_reg(struct m_can_priv *cdev, int reg, int val) return 0; } -static int iomap_write_fifo(struct m_can_priv *cdev, int offset, int val) +static int iomap_write_fifo(struct m_can_classdev *cdev, int offset, int val) { struct m_can_plat_priv *priv = (struct m_can_plat_priv *)cdev->device_data; @@ -59,7 +59,7 @@ static struct m_can_ops m_can_plat_ops = { static int m_can_plat_probe(struct platform_device *pdev) { - struct m_can_priv *mcan_class; + struct m_can_classdev *mcan_class; struct m_can_plat_priv *priv; struct resource *res; void __iomem *addr; @@ -131,7 +131,7 @@ static __maybe_unused int m_can_resume(struct device *dev) static int m_can_plat_remove(struct platform_device *pdev) { struct net_device *dev = platform_get_drvdata(pdev); - struct m_can_priv *mcan_class = netdev_priv(dev); + struct m_can_classdev *mcan_class = netdev_priv(dev); m_can_class_unregister(mcan_class); @@ -143,7 +143,7 @@ static int m_can_plat_remove(struct platform_device *pdev) static int __maybe_unused m_can_runtime_suspend(struct device *dev) { struct net_device *ndev = dev_get_drvdata(dev); - struct m_can_priv *mcan_class = netdev_priv(ndev); + struct m_can_classdev *mcan_class = netdev_priv(ndev); m_can_class_suspend(dev); @@ -156,7 +156,7 @@ static int __maybe_unused m_can_runtime_suspend(struct device *dev) static int __maybe_unused m_can_runtime_resume(struct device *dev) { struct net_device *ndev = dev_get_drvdata(dev); - struct m_can_priv *mcan_class = netdev_priv(ndev); + struct m_can_classdev *mcan_class = netdev_priv(ndev); int err; err = clk_prepare_enable(mcan_class->hclk); From patchwork Tue Mar 5 15:52:19 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Dan Murphy X-Patchwork-Id: 159668 Delivered-To: patch@linaro.org Received: by 2002:a02:5cc1:0:0:0:0:0 with SMTP id w62csp5119415jad; Tue, 5 Mar 2019 07:53:13 -0800 (PST) X-Google-Smtp-Source: APXvYqyDmMo0ei24FylDkcxOKWkO30jzcCnsA9UODqES8Py9eIV9WCcQkPClUBrqXvebwvUPSnR3 X-Received: by 2002:a65:44cb:: with SMTP id g11mr1959128pgs.29.1551801193390; Tue, 05 Mar 2019 07:53:13 -0800 (PST) ARC-Seal: i=1; a=rsa-sha256; t=1551801193; cv=none; d=google.com; s=arc-20160816; b=FuBRM/aZ3kyufvHS17+g3KrbPy2vLxiMDGXCqJb4WnLI5S6cLBWJqLE3n+XFUItbMS uquzXAGEYwiVT7ArzAB4C1cHzJC4oSY3PnrbSk97/5/IFxOA0BvlmUTnrYe4NBD9qiCw AdSX0JYxbneb3jzU40+e0xKa+5JCNw5VmsI4u8pAnVL0kfclWRtNTAFw8uKrovfDrw80 jUiL7yxjbneTXXtaIYrhWw1lifar8/9vkjy3NpJnYrD46gkRJyeQ//k4e39QizsEdtZj Hi0mPSjpmGRXVfAZk/RCTJEpImIzGTy5eRf3FZV8Rh8a5b7H8unw9JKmDveL8exDWtRh N3+g== ARC-Message-Signature: i=1; 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[209.132.180.67]) by mx.google.com with ESMTP id p4si9535564pli.159.2019.03.05.07.53.13; Tue, 05 Mar 2019 07:53:13 -0800 (PST) Received-SPF: pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) client-ip=209.132.180.67; Authentication-Results: mx.google.com; dkim=pass header.i=@ti.com header.s=ti-com-17Q1 header.b=tnEG3+dU; spf=pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=pass (p=QUARANTINE sp=NONE dis=NONE) header.from=ti.com Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728690AbfCEPwq (ORCPT + 31 others); Tue, 5 Mar 2019 10:52:46 -0500 Received: from lelv0143.ext.ti.com ([198.47.23.248]:50172 "EHLO lelv0143.ext.ti.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727626AbfCEPwp (ORCPT ); Tue, 5 Mar 2019 10:52:45 -0500 Received: from lelv0266.itg.ti.com ([10.180.67.225]) by lelv0143.ext.ti.com (8.15.2/8.15.2) with ESMTP id x25Fqc20065509; Tue, 5 Mar 2019 09:52:38 -0600 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=ti.com; s=ti-com-17Q1; t=1551801158; bh=5raF2BBzA/MPB8MxpCh4q+p42RjInP1ckXCpdT20HS0=; h=From:To:CC:Subject:Date:In-Reply-To:References; b=tnEG3+dU7EGmwE8ipPuHa1RR/fMKS21PbePfgrNrc50A/jECvAy6uwtEQ8yz63RYG yHZjEzZ9nkHWPmdm5xRL2YLy4aAirAdP8w3TN5o/O/vwPD8HuOKaQ3j6Izaoq407xe EfN+DALMqlEr0S/UeJbJ/NayrDYKgDCg4PzaahoM= Received: from DFLE108.ent.ti.com (dfle108.ent.ti.com [10.64.6.29]) by lelv0266.itg.ti.com (8.15.2/8.15.2) with ESMTPS id x25FqcR0112402 (version=TLSv1.2 cipher=AES256-GCM-SHA384 bits=256 verify=FAIL); Tue, 5 Mar 2019 09:52:38 -0600 Received: from DFLE100.ent.ti.com (10.64.6.21) by DFLE108.ent.ti.com (10.64.6.29) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256_P256) id 15.1.1591.10; Tue, 5 Mar 2019 09:52:38 -0600 Received: from dlep33.itg.ti.com (157.170.170.75) by DFLE100.ent.ti.com (10.64.6.21) with Microsoft SMTP Server (version=TLS1_0, cipher=TLS_RSA_WITH_AES_256_CBC_SHA) id 15.1.1591.10 via Frontend Transport; Tue, 5 Mar 2019 09:52:38 -0600 Received: from legion.dal.desgin.ti.com (legion.dal.design.ti.com [128.247.22.53]) by dlep33.itg.ti.com (8.14.3/8.13.8) with ESMTP id x25FqbRf016597; Tue, 5 Mar 2019 09:52:37 -0600 Received: from localhost (a0272616local-lt.dhcp.ti.com [172.22.71.209]) by legion.dal.desgin.ti.com (8.11.7p1+Sun/8.11.7) with ESMTP id x25FqbU00547; Tue, 5 Mar 2019 09:52:37 -0600 (CST) From: Dan Murphy To: , , CC: , , , Dan Murphy Subject: [PATCH v7 3/4] dt-bindings: can: tcan4x5x: Add DT bindings for TCAN4x5X driver Date: Tue, 5 Mar 2019 09:52:19 -0600 Message-ID: <20190305155220.14037-3-dmurphy@ti.com> X-Mailer: git-send-email 2.12.2 In-Reply-To: <20190305155220.14037-1-dmurphy@ti.com> References: <20190305155220.14037-1-dmurphy@ti.com> MIME-Version: 1.0 X-EXCLAIMER-MD-CONFIG: e1e8a2fd-e40a-4ac6-ac9b-f7e9cc9ee180 Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org DT binding documentation for TI TCAN4x5x driver. Signed-off-by: Dan Murphy --- v7 - Made device state optional - https://lore.kernel.org/patchwork/patch/1047218/ v6 - No changes - https://lore.kernel.org/patchwork/patch/1042445/ .../devicetree/bindings/net/can/tcan4x5x.txt | 37 +++++++++++++++++++ 1 file changed, 37 insertions(+) create mode 100644 Documentation/devicetree/bindings/net/can/tcan4x5x.txt -- 2.20.1.390.gb5101f9297 diff --git a/Documentation/devicetree/bindings/net/can/tcan4x5x.txt b/Documentation/devicetree/bindings/net/can/tcan4x5x.txt new file mode 100644 index 000000000000..c388f7d9feb1 --- /dev/null +++ b/Documentation/devicetree/bindings/net/can/tcan4x5x.txt @@ -0,0 +1,37 @@ +Texas Instruments TCAN4x5x CAN Controller +================================================ + +This file provides device node information for the TCAN4x5x interface contains. + +Required properties: + - compatible: "ti,tcan4x5x" + - reg: 0 + - #address-cells: 1 + - #size-cells: 0 + - spi-max-frequency: Maximum frequency of the SPI bus the chip can + operate at should be less than or equal to 18 MHz. + - data-ready-gpios: Interrupt GPIO for data and error reporting. + - device-wake-gpios: Wake up GPIO to wake up the TCAN device. + +See Documentation/devicetree/bindings/net/can/m_can.txt for additional +required property details. + +Optional properties: + - reset-gpios: Hardwired output GPIO. If not defined then software + reset. + - device-state-gpios: Input GPIO that indicates if the device is in + a sleep state or if the device is active. + +Example: +tcan4x5x: tcan4x5x@0 { + compatible = "ti,tcan4x5x"; + reg = <0>; + #address-cells = <1>; + #size-cells = <1>; + spi-max-frequency = <10000000>; + bosch,mram-cfg = <0x0 0 0 32 0 0 1 1>; + data-ready-gpios = <&gpio1 14 GPIO_ACTIVE_LOW>; + device-state-gpios = <&gpio3 21 GPIO_ACTIVE_HIGH>; + device-wake-gpios = <&gpio1 15 GPIO_ACTIVE_HIGH>; + reset-gpios = <&gpio1 27 GPIO_ACTIVE_LOW>; +}; From patchwork Tue Mar 5 15:52:20 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Dan Murphy X-Patchwork-Id: 159665 Delivered-To: patch@linaro.org Received: by 2002:a02:5cc1:0:0:0:0:0 with SMTP id w62csp5119085jad; Tue, 5 Mar 2019 07:52:50 -0800 (PST) X-Google-Smtp-Source: APXvYqxVnAixpskw5HwjrTxE1AloxSdKvdk1PlKCt+toT9lqhigFRRotzP28cx+tLoiVXGyrn4jD X-Received: by 2002:a17:902:b181:: with SMTP id s1mr1832934plr.321.1551801170315; Tue, 05 Mar 2019 07:52:50 -0800 (PST) ARC-Seal: i=1; a=rsa-sha256; t=1551801170; cv=none; d=google.com; s=arc-20160816; b=mS0604f+8oXEFo8wZUwxW9HRGZ8Ema1xWiVzlFw58AekZkJm6B/trDjTX8bF2btBp0 TQwj0L1jOV3PJDNyhEq5WMqkCAZmAeI2mhW8+JcieWrhjSxDQCPbJfeeFBcfMWl2/S/3 mfKA1bcFY+8VIhj34ZlHr1kiM3uPY6MEAm4xjNmeeyA0wGKZAnIN6sFpaRohbJ8WhK4x GWoh6n5WCt77TtQK2G9MlxzAa+TQxv94EYKdtMdsoHd4EzVwNxRYbz+jBj6yb49CX5jg ChkRIQR4OhqmKGVWf2A/ED6ektkiCosdLsxtu/2L3msNFDmP1ibvwmhEmPQ+5wXJrohx +r4g== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=list-id:precedence:sender:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:dkim-signature; bh=TA5QPfKBMKhrKHoCl35Vs9r4ztJN+chPax1jJavQAnc=; b=oyQzzn0vDWeiGo0TqehGrn9+9ag3tmmPEJBNcxOQeo6QDtrNKObiQFY8tL5izXbP5u NoaQ52Rad2ENdnCc87vV7grhQ7FBQbwNzMNxEV4IPECeFsHBDPb/M0hSYHHeaql7YZ9W 0LIG7acRMhPeHOkoUYAQcz2asppniupQA9qin+edprDM1GlFDg+Ze5/9I1yBW6lE2fnE CEd4hy+wm36wrsswD3GlGYq2hYTIOx7CDkmv/rJY+o5jxZAh9r77kncQ553sIcD+WFOG MS4XK1t/b3R7PYMWUyhnkqJCFNbP3qVe9u7B9YXzPhLFmLzyQTpUVwmsUW/7IisSfXTP 2rsQ== ARC-Authentication-Results: i=1; mx.google.com; dkim=pass header.i=@ti.com header.s=ti-com-17Q1 header.b=G6eoPAl1; spf=pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=pass (p=QUARANTINE sp=NONE dis=NONE) header.from=ti.com Return-Path: Received: from vger.kernel.org (vger.kernel.org. [209.132.180.67]) by mx.google.com with ESMTP id t11si4563016plr.62.2019.03.05.07.52.50; Tue, 05 Mar 2019 07:52:50 -0800 (PST) Received-SPF: pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) client-ip=209.132.180.67; Authentication-Results: mx.google.com; dkim=pass header.i=@ti.com header.s=ti-com-17Q1 header.b=G6eoPAl1; spf=pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=pass (p=QUARANTINE sp=NONE dis=NONE) header.from=ti.com Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728761AbfCEPws (ORCPT + 31 others); Tue, 5 Mar 2019 10:52:48 -0500 Received: from lelv0143.ext.ti.com ([198.47.23.248]:50170 "EHLO lelv0143.ext.ti.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727613AbfCEPwq (ORCPT ); Tue, 5 Mar 2019 10:52:46 -0500 Received: from lelv0266.itg.ti.com ([10.180.67.225]) by lelv0143.ext.ti.com (8.15.2/8.15.2) with ESMTP id x25FqdoH065513; Tue, 5 Mar 2019 09:52:39 -0600 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=ti.com; s=ti-com-17Q1; t=1551801159; bh=TA5QPfKBMKhrKHoCl35Vs9r4ztJN+chPax1jJavQAnc=; h=From:To:CC:Subject:Date:In-Reply-To:References; b=G6eoPAl1DeibT7b/Y6RWkV5E3IChgK7VnopEs8S+yAvw9UbAgnP4UeF5PyWOKODJ7 cI6r3fQCBbTErs6O+RvvaCVtSoHrJkvNxVeNruZjKYWT96jBkCjGgDBGw/0zg/4Gt/ sXdez7fEaK+VfRy8hYehxb2cRNvdRK7wHVz4tGR0= Received: from DLEE109.ent.ti.com (dlee109.ent.ti.com [157.170.170.41]) by lelv0266.itg.ti.com (8.15.2/8.15.2) with ESMTPS id x25FqdfA112408 (version=TLSv1.2 cipher=AES256-GCM-SHA384 bits=256 verify=FAIL); Tue, 5 Mar 2019 09:52:39 -0600 Received: from DLEE102.ent.ti.com (157.170.170.32) by DLEE109.ent.ti.com (157.170.170.41) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256_P256) id 15.1.1591.10; Tue, 5 Mar 2019 09:52:38 -0600 Received: from dlep33.itg.ti.com (157.170.170.75) by DLEE102.ent.ti.com (157.170.170.32) with Microsoft SMTP Server (version=TLS1_0, cipher=TLS_RSA_WITH_AES_256_CBC_SHA) id 15.1.1591.10 via Frontend Transport; Tue, 5 Mar 2019 09:52:38 -0600 Received: from legion.dal.desgin.ti.com (legion.dal.design.ti.com [128.247.22.53]) by dlep33.itg.ti.com (8.14.3/8.13.8) with ESMTP id x25FqclN016607; Tue, 5 Mar 2019 09:52:38 -0600 Received: from localhost (a0272616local-lt.dhcp.ti.com [172.22.71.209]) by legion.dal.desgin.ti.com (8.11.7p1+Sun/8.11.7) with ESMTP id x25FqcU00555; Tue, 5 Mar 2019 09:52:38 -0600 (CST) From: Dan Murphy To: , , CC: , , , Dan Murphy Subject: [PATCH v7 4/4] can: tcan4x5x: Add tcan4x5x driver to the kernel Date: Tue, 5 Mar 2019 09:52:20 -0600 Message-ID: <20190305155220.14037-4-dmurphy@ti.com> X-Mailer: git-send-email 2.12.2 In-Reply-To: <20190305155220.14037-1-dmurphy@ti.com> References: <20190305155220.14037-1-dmurphy@ti.com> MIME-Version: 1.0 X-EXCLAIMER-MD-CONFIG: e1e8a2fd-e40a-4ac6-ac9b-f7e9cc9ee180 Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Add the TCAN4x5x SPI CAN driver. This device uses the Bosch MCAN IP core along with a SPI interface map. Register to the MCAN common core code to manage the MCAN IP. This device has a special method to indicate a write/read operation on the data payload. Signed-off-by: Dan Murphy --- v7 - Fixed remaining checkpatch issues and renamed callbacks for m_can change - https://lore.kernel.org/patchwork/patch/1047221/ v6 - Updated Kconfig help and added REGMAP_SPI dependency, fixed coding style issues, removed setting GPIO high in wake routine, change -EIO to return ret in init and setup functions - https://lore.kernel.org/patchwork/patch/1042443/ drivers/net/can/m_can/Kconfig | 9 + drivers/net/can/m_can/Makefile | 1 + drivers/net/can/m_can/tcan4x5x.c | 533 +++++++++++++++++++++++++++++++ 3 files changed, 543 insertions(+) create mode 100644 drivers/net/can/m_can/tcan4x5x.c -- 2.20.1.390.gb5101f9297 diff --git a/drivers/net/can/m_can/Kconfig b/drivers/net/can/m_can/Kconfig index f7119fd72df4..cf4f32765efa 100644 --- a/drivers/net/can/m_can/Kconfig +++ b/drivers/net/can/m_can/Kconfig @@ -12,3 +12,12 @@ config CAN_M_CAN_PLATFORM Say Y here if you want support for IO Mapped Bosch M_CAN controller. This support is for devices that have the Bosch M_CAN controller IP embedded into the device and the IP is IO Mapped to the processor. + +config CAN_M_CAN_TCAN4X5X + depends on CAN_M_CAN + depends on REGMAP_SPI + tristate "TCAN4X5X M_CAN device" + ---help--- + Say Y here if you want support for Texas Instruments TCAN4x5x + M_CAN controller. This device is a peripherial device that uses the + SPI bus for communication. diff --git a/drivers/net/can/m_can/Makefile b/drivers/net/can/m_can/Makefile index 057bbcdb3c74..e77f0eccff97 100644 --- a/drivers/net/can/m_can/Makefile +++ b/drivers/net/can/m_can/Makefile @@ -4,3 +4,4 @@ obj-$(CONFIG_CAN_M_CAN) += m_can.o obj-$(CONFIG_CAN_M_CAN_PLATFORM) += m_can_platform.o +obj-$(CONFIG_CAN_M_CAN_TCAN4X5X) += tcan4x5x.o diff --git a/drivers/net/can/m_can/tcan4x5x.c b/drivers/net/can/m_can/tcan4x5x.c new file mode 100644 index 000000000000..9f52b298fdbf --- /dev/null +++ b/drivers/net/can/m_can/tcan4x5x.c @@ -0,0 +1,533 @@ +// SPDX-License-Identifier: GPL-2.0 +// SPI to CAN driver for the Texas Instruments TCAN4x5x +// Copyright (C) 2018-19 Texas Instruments Incorporated - http://www.ti.com/ + +#include +#include + +#include +#include + +#include "m_can.h" + +#define DEVICE_NAME "tcan4x5x" +#define TCAN4X5X_EXT_CLK_DEF 40000000 + +#define TCAN4X5X_DEV_ID0 0x00 +#define TCAN4X5X_DEV_ID1 0x04 +#define TCAN4X5X_REV 0x08 +#define TCAN4X5X_STATUS 0x0C +#define TCAN4X5X_ERROR_STATUS 0x10 +#define TCAN4X5X_CONTROL 0x14 + +#define TCAN4X5X_CONFIG 0x800 +#define TCAN4X5X_TS_PRESCALE 0x804 +#define TCAN4X5X_TEST_REG 0x808 +#define TCAN4X5X_INT_FLAGS 0x820 +#define TCAN4X5X_MCAN_INT_REG 0x824 +#define TCAN4X5X_INT_EN 0x830 + +/* Interrupt bits */ +#define TCAN4X5X_CANBUSTERMOPEN_INT_EN BIT(30) +#define TCAN4X5X_CANHCANL_INT_EN BIT(29) +#define TCAN4X5X_CANHBAT_INT_EN BIT(28) +#define TCAN4X5X_CANLGND_INT_EN BIT(27) +#define TCAN4X5X_CANBUSOPEN_INT_EN BIT(26) +#define TCAN4X5X_CANBUSGND_INT_EN BIT(25) +#define TCAN4X5X_CANBUSBAT_INT_EN BIT(24) +#define TCAN4X5X_UVSUP_INT_EN BIT(22) +#define TCAN4X5X_UVIO_INT_EN BIT(21) +#define TCAN4X5X_TSD_INT_EN BIT(19) +#define TCAN4X5X_ECCERR_INT_EN BIT(16) +#define TCAN4X5X_CANINT_INT_EN BIT(15) +#define TCAN4X5X_LWU_INT_EN BIT(14) +#define TCAN4X5X_CANSLNT_INT_EN BIT(10) +#define TCAN4X5X_CANDOM_INT_EN BIT(8) +#define TCAN4X5X_CANBUS_ERR_INT_EN BIT(5) +#define TCAN4X5X_BUS_FAULT BIT(4) +#define TCAN4X5X_MCAN_INT BIT(1) +#define TCAN4X5X_ENABLE_TCAN_INT (TCAN4X5X_MCAN_INT | \ + TCAN4X5X_BUS_FAULT | \ + TCAN4X5X_CANBUS_ERR_INT_EN | \ + TCAN4X5X_CANINT_INT_EN) + +/* MCAN Interrupt bits */ +#define TCAN4X5X_MCAN_IR_ARA BIT(29) +#define TCAN4X5X_MCAN_IR_PED BIT(28) +#define TCAN4X5X_MCAN_IR_PEA BIT(27) +#define TCAN4X5X_MCAN_IR_WD BIT(26) +#define TCAN4X5X_MCAN_IR_BO BIT(25) +#define TCAN4X5X_MCAN_IR_EW BIT(24) +#define TCAN4X5X_MCAN_IR_EP BIT(23) +#define TCAN4X5X_MCAN_IR_ELO BIT(22) +#define TCAN4X5X_MCAN_IR_BEU BIT(21) +#define TCAN4X5X_MCAN_IR_BEC BIT(20) +#define TCAN4X5X_MCAN_IR_DRX BIT(19) +#define TCAN4X5X_MCAN_IR_TOO BIT(18) +#define TCAN4X5X_MCAN_IR_MRAF BIT(17) +#define TCAN4X5X_MCAN_IR_TSW BIT(16) +#define TCAN4X5X_MCAN_IR_TEFL BIT(15) +#define TCAN4X5X_MCAN_IR_TEFF BIT(14) +#define TCAN4X5X_MCAN_IR_TEFW BIT(13) +#define TCAN4X5X_MCAN_IR_TEFN BIT(12) +#define TCAN4X5X_MCAN_IR_TFE BIT(11) +#define TCAN4X5X_MCAN_IR_TCF BIT(10) +#define TCAN4X5X_MCAN_IR_TC BIT(9) +#define TCAN4X5X_MCAN_IR_HPM BIT(8) +#define TCAN4X5X_MCAN_IR_RF1L BIT(7) +#define TCAN4X5X_MCAN_IR_RF1F BIT(6) +#define TCAN4X5X_MCAN_IR_RF1W BIT(5) +#define TCAN4X5X_MCAN_IR_RF1N BIT(4) +#define TCAN4X5X_MCAN_IR_RF0L BIT(3) +#define TCAN4X5X_MCAN_IR_RF0F BIT(2) +#define TCAN4X5X_MCAN_IR_RF0W BIT(1) +#define TCAN4X5X_MCAN_IR_RF0N BIT(0) +#define TCAN4X5X_ENABLE_MCAN_INT (TCAN4X5X_MCAN_IR_TC | \ + TCAN4X5X_MCAN_IR_RF0N | \ + TCAN4X5X_MCAN_IR_RF1N | \ + TCAN4X5X_MCAN_IR_RF0F | \ + TCAN4X5X_MCAN_IR_RF1F) +#define TCAN4X5X_MRAM_START 0x8000 +#define TCAN4X5X_MCAN_OFFSET 0x1000 +#define TCAN4X5X_MAX_REGISTER 0x8fff + +#define TCAN4X5X_CLEAR_ALL_INT 0xffffffff +#define TCAN4X5X_SET_ALL_INT 0xffffffff + +#define TCAN4X5X_WRITE_CMD (0x61 << 24) +#define TCAN4X5X_READ_CMD (0x41 << 24) + +#define TCAN4X5X_MODE_SEL_MASK (BIT(7) | BIT(6)) +#define TCAN4X5X_MODE_SLEEP 0x00 +#define TCAN4X5X_MODE_STANDBY BIT(6) +#define TCAN4X5X_MODE_NORMAL BIT(7) + +#define TCAN4X5X_SW_RESET BIT(2) + +#define TCAN4X5X_MCAN_CONFIGURED BIT(5) +#define TCAN4X5X_WATCHDOG_EN BIT(3) +#define TCAN4X5X_WD_60_MS_TIMER 0 +#define TCAN4X5X_WD_600_MS_TIMER BIT(28) +#define TCAN4X5X_WD_3_S_TIMER BIT(29) +#define TCAN4X5X_WD_6_S_TIMER (BIT(28) | BIT(29)) + +struct tcan4x5x_priv { + struct regmap *regmap; + struct spi_device *spi; + struct mutex tcan4x5x_lock; /* SPI device lock */ + + struct m_can_classdev *mcan_dev; + + struct gpio_desc *reset_gpio; + struct gpio_desc *interrupt_gpio; + struct gpio_desc *device_wake_gpio; + struct gpio_desc *device_state_gpio; + struct regulator *power; + + /* Register based ip */ + int mram_start; + int reg_offset; +}; + +static struct can_bittiming_const tcan4x5x_bittiming_const = { + .name = DEVICE_NAME, + .tseg1_min = 2, + .tseg1_max = 31, + .tseg2_min = 2, + .tseg2_max = 16, + .sjw_max = 16, + .brp_min = 1, + .brp_max = 32, + .brp_inc = 1, +}; + +static struct can_bittiming_const tcan4x5x_data_bittiming_const = { + .name = DEVICE_NAME, + .tseg1_min = 1, + .tseg1_max = 32, + .tseg2_min = 1, + .tseg2_max = 16, + .sjw_max = 16, + .brp_min = 1, + .brp_max = 32, + .brp_inc = 1, +}; + +static void tcan4x5x_check_wake(struct tcan4x5x_priv *priv) +{ + int wake_state = 0; + + if (priv->device_state_gpio) + wake_state = gpiod_get_value(priv->device_state_gpio); + + if (priv->device_wake_gpio && wake_state) { + gpiod_set_value(priv->device_wake_gpio, 0); + usleep_range(5, 50); + gpiod_set_value(priv->device_wake_gpio, 1); + } +} + +static int regmap_spi_gather_write(void *context, const void *reg, + size_t reg_len, const void *val, + size_t val_len) +{ + struct device *dev = context; + struct spi_device *spi = to_spi_device(dev); + struct spi_message m; + u32 addr; + struct spi_transfer t[2] = { + { .tx_buf = &addr, .len = reg_len, .cs_change = 0,}, + { .tx_buf = val, .len = val_len, }, + }; + + addr = TCAN4X5X_WRITE_CMD | (*((u16 *)reg) << 8) | val_len >> 3; + + spi_message_init(&m); + spi_message_add_tail(&t[0], &m); + spi_message_add_tail(&t[1], &m); + + return spi_sync(spi, &m); +} + +static int tcan4x5x_regmap_write(void *context, const void *data, size_t count) +{ + u16 *reg = (u16 *)(data); + const u32 *val = data + 4; + + return regmap_spi_gather_write(context, reg, 4, val, count); +} + +static int regmap_spi_async_write(void *context, + const void *reg, size_t reg_len, + const void *val, size_t val_len, + struct regmap_async *a) +{ + return -ENOTSUPP; +} + +static struct regmap_async *regmap_spi_async_alloc(void) +{ + return NULL; +} + +static int tcan4x5x_regmap_read(void *context, + const void *reg, size_t reg_size, + void *val, size_t val_size) +{ + struct device *dev = context; + struct spi_device *spi = to_spi_device(dev); + + u32 addr = TCAN4X5X_READ_CMD | (*((u16 *)reg) << 8) | val_size >> 2; + + return spi_write_then_read(spi, &addr, reg_size, (u32 *)val, val_size); +} + +static struct regmap_bus tcan4x5x_bus = { + .write = tcan4x5x_regmap_write, + .gather_write = regmap_spi_gather_write, + .async_write = regmap_spi_async_write, + .async_alloc = regmap_spi_async_alloc, + .read = tcan4x5x_regmap_read, + .read_flag_mask = 0x00, + .reg_format_endian_default = REGMAP_ENDIAN_NATIVE, + .val_format_endian_default = REGMAP_ENDIAN_NATIVE, +}; + +static u32 tcan4x5x_read_reg(struct m_can_classdev *cdev, int reg) +{ + struct tcan4x5x_priv *priv = (struct tcan4x5x_priv *)cdev->device_data; + u32 val; + + tcan4x5x_check_wake(priv); + + regmap_read(priv->regmap, priv->reg_offset + reg, &val); + + return val; +} + +static u32 tcan4x5x_read_fifo(struct m_can_classdev *cdev, int addr_offset) +{ + struct tcan4x5x_priv *priv = (struct tcan4x5x_priv *)cdev->device_data; + u32 val; + + tcan4x5x_check_wake(priv); + + regmap_read(priv->regmap, priv->mram_start + addr_offset, &val); + + return val; +} + +static int tcan4x5x_write_reg(struct m_can_classdev *cdev, int reg, int val) +{ + struct tcan4x5x_priv *priv = (struct tcan4x5x_priv *)cdev->device_data; + + tcan4x5x_check_wake(priv); + + return regmap_write(priv->regmap, priv->reg_offset + reg, val); +} + +static int tcan4x5x_write_fifo(struct m_can_classdev *cdev, + int addr_offset, int val) +{ + struct tcan4x5x_priv *priv = + (struct tcan4x5x_priv *)cdev->device_data; + + tcan4x5x_check_wake(priv); + + return regmap_write(priv->regmap, priv->mram_start + addr_offset, val); +} + +static int tcan4x5x_power_enable(struct regulator *reg, int enable) +{ + if (IS_ERR_OR_NULL(reg)) + return 0; + + if (enable) + return regulator_enable(reg); + else + return regulator_disable(reg); +} + +static int tcan4x5x_write_tcan_reg(struct m_can_classdev *cdev, + int reg, int val) +{ + struct tcan4x5x_priv *priv = + (struct tcan4x5x_priv *)cdev->device_data; + + tcan4x5x_check_wake(priv); + + return regmap_write(priv->regmap, reg, val); +} + +static int tcan4x5x_clear_interrupts(struct m_can_classdev *cdev) +{ + struct tcan4x5x_priv *tcan4x5x = + (struct tcan4x5x_priv *)cdev->device_data; + int ret; + + tcan4x5x_check_wake(tcan4x5x); + + ret = tcan4x5x_write_tcan_reg(cdev, TCAN4X5X_STATUS, + TCAN4X5X_CLEAR_ALL_INT); + if (ret) + return ret; + + ret = tcan4x5x_write_tcan_reg(cdev, TCAN4X5X_MCAN_INT_REG, + TCAN4X5X_ENABLE_MCAN_INT); + if (ret) + return ret; + + ret = tcan4x5x_write_tcan_reg(cdev, TCAN4X5X_INT_FLAGS, + TCAN4X5X_CLEAR_ALL_INT); + if (ret) + return ret; + + ret = tcan4x5x_write_tcan_reg(cdev, TCAN4X5X_ERROR_STATUS, + TCAN4X5X_CLEAR_ALL_INT); + if (ret) + return ret; + + return ret; +} + +static int tcan4x5x_init(struct m_can_classdev *cdev) +{ + struct tcan4x5x_priv *tcan4x5x = + (struct tcan4x5x_priv *)cdev->device_data; + int ret; + + tcan4x5x_check_wake(tcan4x5x); + + ret = tcan4x5x_clear_interrupts(cdev); + if (ret) + return ret; + + ret = tcan4x5x_write_tcan_reg(cdev, TCAN4X5X_INT_EN, + TCAN4X5X_ENABLE_TCAN_INT); + if (ret) + return ret; + + ret = regmap_update_bits(tcan4x5x->regmap, TCAN4X5X_CONFIG, + TCAN4X5X_MODE_SEL_MASK, TCAN4X5X_MODE_NORMAL); + if (ret) + return ret; + + /* Zero out the MCAN buffers */ + m_can_init_ram(cdev); + + return ret; +} + +static int tcan4x5x_parse_config(struct m_can_classdev *cdev) +{ + struct tcan4x5x_priv *tcan4x5x = + (struct tcan4x5x_priv *)cdev->device_data; + + tcan4x5x->interrupt_gpio = devm_gpiod_get(cdev->dev, "data-ready", + GPIOD_IN); + if (IS_ERR(tcan4x5x->interrupt_gpio)) { + dev_err(cdev->dev, "data-ready gpio not defined\n"); + return -EINVAL; + } + + tcan4x5x->device_wake_gpio = devm_gpiod_get(cdev->dev, "device-wake", + GPIOD_OUT_HIGH); + if (IS_ERR(tcan4x5x->device_wake_gpio)) { + dev_err(cdev->dev, "device-wake gpio not defined\n"); + return -EINVAL; + } + + tcan4x5x->reset_gpio = devm_gpiod_get_optional(cdev->dev, "reset", + GPIOD_OUT_LOW); + if (IS_ERR(tcan4x5x->reset_gpio)) + tcan4x5x->reset_gpio = NULL; + + tcan4x5x->device_state_gpio = devm_gpiod_get_optional(cdev->dev, + "device-state", + GPIOD_IN); + if (IS_ERR(tcan4x5x->device_state_gpio)) + tcan4x5x->device_state_gpio = NULL; + + cdev->net->irq = gpiod_to_irq(tcan4x5x->interrupt_gpio); + + tcan4x5x->power = devm_regulator_get_optional(cdev->dev, + "vsup"); + if (PTR_ERR(tcan4x5x->power) == -EPROBE_DEFER) + return -EPROBE_DEFER; + + return 0; +} + +static const struct regmap_config tcan4x5x_regmap = { + .reg_bits = 32, + .val_bits = 32, + .cache_type = REGCACHE_NONE, + .max_register = TCAN4X5X_MAX_REGISTER, +}; + +static struct m_can_ops tcan4x5x_ops = { + .init = tcan4x5x_init, + .read_reg = tcan4x5x_read_reg, + .write_reg = tcan4x5x_write_reg, + .write_fifo = tcan4x5x_write_fifo, + .read_fifo = tcan4x5x_read_fifo, + .clear_interrupts = tcan4x5x_clear_interrupts, +}; + +static int tcan4x5x_can_probe(struct spi_device *spi) +{ + struct tcan4x5x_priv *priv; + struct m_can_classdev *mcan_class; + int freq, ret; + + mcan_class = m_can_class_allocate_dev(&spi->dev); + priv = devm_kzalloc(&spi->dev, sizeof(*priv), GFP_KERNEL); + if (!priv) + return -ENOMEM; + + mcan_class->device_data = priv; + + m_can_class_get_clocks(mcan_class); + if (IS_ERR(mcan_class->cclk)) { + dev_err(&spi->dev, "no CAN clock source defined\n"); + freq = TCAN4X5X_EXT_CLK_DEF; + } else { + freq = clk_get_rate(mcan_class->cclk); + } + + /* Sanity check */ + if (freq < 20000000 || freq > TCAN4X5X_EXT_CLK_DEF) + return -ERANGE; + + priv->reg_offset = TCAN4X5X_MCAN_OFFSET; + priv->mram_start = TCAN4X5X_MRAM_START; + priv->spi = spi; + priv->mcan_dev = mcan_class; + + mcan_class->pm_clock_support = 0; + mcan_class->can.clock.freq = freq; + mcan_class->dev = &spi->dev; + mcan_class->ops = &tcan4x5x_ops; + mcan_class->is_peripherial = true; + mcan_class->bit_timing = &tcan4x5x_bittiming_const; + mcan_class->data_timing = &tcan4x5x_data_bittiming_const; + + spi_set_drvdata(spi, priv); + + ret = tcan4x5x_parse_config(mcan_class); + if (ret) + goto out_clk; + + /* Configure the SPI bus */ + spi->bits_per_word = 32; + ret = spi_setup(spi); + if (ret) + goto out_clk; + + priv->regmap = devm_regmap_init(&spi->dev, &tcan4x5x_bus, + &spi->dev, &tcan4x5x_regmap); + + mutex_init(&priv->tcan4x5x_lock); + + tcan4x5x_power_enable(priv->power, 1); + + ret = m_can_class_register(mcan_class); + if (ret) + goto out_power; + + netdev_info(mcan_class->net, "TCAN4X5X successfully initialized.\n"); + return 0; + +out_power: + tcan4x5x_power_enable(priv->power, 0); +out_clk: + if (!IS_ERR(mcan_class->cclk)) { + clk_disable_unprepare(mcan_class->cclk); + clk_disable_unprepare(mcan_class->hclk); + } + + dev_err(&spi->dev, "Probe failed, err=%d\n", ret); + return ret; +} + +static int tcan4x5x_can_remove(struct spi_device *spi) +{ + struct tcan4x5x_priv *priv = spi_get_drvdata(spi); + + tcan4x5x_power_enable(priv->power, 0); + + m_can_class_unregister(priv->mcan_dev); + + return 0; +} + +static const struct of_device_id tcan4x5x_of_match[] = { + { .compatible = "ti,tcan4x5x", }, + { } +}; +MODULE_DEVICE_TABLE(of, tcan4x5x_of_match); + +static const struct spi_device_id tcan4x5x_id_table[] = { + { + .name = "tcan4x5x", + .driver_data = 0, + }, + { } +}; +MODULE_DEVICE_TABLE(spi, tcan4x5x_id_table); + +static struct spi_driver tcan4x5x_can_driver = { + .driver = { + .name = DEVICE_NAME, + .of_match_table = tcan4x5x_of_match, + .pm = NULL, + }, + .id_table = tcan4x5x_id_table, + .probe = tcan4x5x_can_probe, + .remove = tcan4x5x_can_remove, +}; +module_spi_driver(tcan4x5x_can_driver); + +MODULE_AUTHOR("Dan Murphy "); +MODULE_DESCRIPTION("Texas Instruments TCAN4x5x CAN driver"); +MODULE_LICENSE("GPL v2");