flexcan.c revision c971fa2ae42e73e9ccc2f5e93f268c8742da4c5d
1e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde/* 2e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde * flexcan.c - FLEXCAN CAN controller driver 3e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde * 4e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde * Copyright (c) 2005-2006 Varma Electronics Oy 5e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde * Copyright (c) 2009 Sascha Hauer, Pengutronix 6e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde * Copyright (c) 2010 Marc Kleine-Budde, Pengutronix 7e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde * 8e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde * Based on code originally by Andrey Volkov <avolkov@varma-el.com> 9e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde * 10e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde * LICENCE: 11e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde * This program is free software; you can redistribute it and/or 12e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde * modify it under the terms of the GNU General Public License as 13e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde * published by the Free Software Foundation version 2. 14e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde * 15e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde * This program is distributed in the hope that it will be useful, 16e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde * but WITHOUT ANY WARRANTY; without even the implied warranty of 17e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 18e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde * GNU General Public License for more details. 19e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde * 20e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde */ 21e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde 22e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde#include <linux/netdevice.h> 23e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde#include <linux/can.h> 24e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde#include <linux/can/dev.h> 25e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde#include <linux/can/error.h> 26adccadb92f0571fd0f9b2ac8011057a7de9e3e63Fabio Baltieri#include <linux/can/led.h> 27e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde#include <linux/clk.h> 28e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde#include <linux/delay.h> 29e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde#include <linux/if_arp.h> 30e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde#include <linux/if_ether.h> 31e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde#include <linux/interrupt.h> 32e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde#include <linux/io.h> 33e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde#include <linux/kernel.h> 34e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde#include <linux/list.h> 35e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde#include <linux/module.h> 3697efe9aef1ae8922666d32f28d712745a86859e9holt@sgi.com#include <linux/of.h> 3730c1e672044d98e5c4cff5fcbdb34b55a2df0c0fHui Wang#include <linux/of_device.h> 38e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde#include <linux/platform_device.h> 39b7c4114b07bbacfe0aee1d04ad1ade9e42309620Fabio Estevam#include <linux/regulator/consumer.h> 40e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde 41e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde#define DRV_NAME "flexcan" 42e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde 43e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde/* 8 for RX fifo and 2 error handling */ 44e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde#define FLEXCAN_NAPI_WEIGHT (8 + 2) 45e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde 46e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde/* FLEXCAN module configuration register (CANMCR) bits */ 47e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde#define FLEXCAN_MCR_MDIS BIT(31) 48e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde#define FLEXCAN_MCR_FRZ BIT(30) 49e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde#define FLEXCAN_MCR_FEN BIT(29) 50e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde#define FLEXCAN_MCR_HALT BIT(28) 51e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde#define FLEXCAN_MCR_NOT_RDY BIT(27) 52e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde#define FLEXCAN_MCR_WAK_MSK BIT(26) 53e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde#define FLEXCAN_MCR_SOFTRST BIT(25) 54e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde#define FLEXCAN_MCR_FRZ_ACK BIT(24) 55e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde#define FLEXCAN_MCR_SUPV BIT(23) 56e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde#define FLEXCAN_MCR_SLF_WAK BIT(22) 57e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde#define FLEXCAN_MCR_WRN_EN BIT(21) 58e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde#define FLEXCAN_MCR_LPM_ACK BIT(20) 59e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde#define FLEXCAN_MCR_WAK_SRC BIT(19) 60e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde#define FLEXCAN_MCR_DOZE BIT(18) 61e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde#define FLEXCAN_MCR_SRX_DIS BIT(17) 62e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde#define FLEXCAN_MCR_BCC BIT(16) 63e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde#define FLEXCAN_MCR_LPRIO_EN BIT(13) 64e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde#define FLEXCAN_MCR_AEN BIT(12) 65d5a7b406c529e4595ce03dc8f6dcf7fa36f106faMarc Kleine-Budde#define FLEXCAN_MCR_MAXMB(x) ((x) & 0x1f) 66e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde#define FLEXCAN_MCR_IDAM_A (0 << 8) 67e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde#define FLEXCAN_MCR_IDAM_B (1 << 8) 68e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde#define FLEXCAN_MCR_IDAM_C (2 << 8) 69e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde#define FLEXCAN_MCR_IDAM_D (3 << 8) 70e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde 71e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde/* FLEXCAN control register (CANCTRL) bits */ 72e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde#define FLEXCAN_CTRL_PRESDIV(x) (((x) & 0xff) << 24) 73e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde#define FLEXCAN_CTRL_RJW(x) (((x) & 0x03) << 22) 74e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde#define FLEXCAN_CTRL_PSEG1(x) (((x) & 0x07) << 19) 75e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde#define FLEXCAN_CTRL_PSEG2(x) (((x) & 0x07) << 16) 76e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde#define FLEXCAN_CTRL_BOFF_MSK BIT(15) 77e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde#define FLEXCAN_CTRL_ERR_MSK BIT(14) 78e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde#define FLEXCAN_CTRL_CLK_SRC BIT(13) 79e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde#define FLEXCAN_CTRL_LPB BIT(12) 80e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde#define FLEXCAN_CTRL_TWRN_MSK BIT(11) 81e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde#define FLEXCAN_CTRL_RWRN_MSK BIT(10) 82e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde#define FLEXCAN_CTRL_SMP BIT(7) 83e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde#define FLEXCAN_CTRL_BOFF_REC BIT(6) 84e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde#define FLEXCAN_CTRL_TSYN BIT(5) 85e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde#define FLEXCAN_CTRL_LBUF BIT(4) 86e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde#define FLEXCAN_CTRL_LOM BIT(3) 87e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde#define FLEXCAN_CTRL_PROPSEG(x) ((x) & 0x07) 88e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde#define FLEXCAN_CTRL_ERR_BUS (FLEXCAN_CTRL_ERR_MSK) 89e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde#define FLEXCAN_CTRL_ERR_STATE \ 90e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde (FLEXCAN_CTRL_TWRN_MSK | FLEXCAN_CTRL_RWRN_MSK | \ 91e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde FLEXCAN_CTRL_BOFF_MSK) 92e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde#define FLEXCAN_CTRL_ERR_ALL \ 93e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde (FLEXCAN_CTRL_ERR_BUS | FLEXCAN_CTRL_ERR_STATE) 94e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde 95e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde/* FLEXCAN error and status register (ESR) bits */ 96e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde#define FLEXCAN_ESR_TWRN_INT BIT(17) 97e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde#define FLEXCAN_ESR_RWRN_INT BIT(16) 98e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde#define FLEXCAN_ESR_BIT1_ERR BIT(15) 99e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde#define FLEXCAN_ESR_BIT0_ERR BIT(14) 100e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde#define FLEXCAN_ESR_ACK_ERR BIT(13) 101e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde#define FLEXCAN_ESR_CRC_ERR BIT(12) 102e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde#define FLEXCAN_ESR_FRM_ERR BIT(11) 103e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde#define FLEXCAN_ESR_STF_ERR BIT(10) 104e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde#define FLEXCAN_ESR_TX_WRN BIT(9) 105e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde#define FLEXCAN_ESR_RX_WRN BIT(8) 106e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde#define FLEXCAN_ESR_IDLE BIT(7) 107e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde#define FLEXCAN_ESR_TXRX BIT(6) 108e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde#define FLEXCAN_EST_FLT_CONF_SHIFT (4) 109e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde#define FLEXCAN_ESR_FLT_CONF_MASK (0x3 << FLEXCAN_EST_FLT_CONF_SHIFT) 110e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde#define FLEXCAN_ESR_FLT_CONF_ACTIVE (0x0 << FLEXCAN_EST_FLT_CONF_SHIFT) 111e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde#define FLEXCAN_ESR_FLT_CONF_PASSIVE (0x1 << FLEXCAN_EST_FLT_CONF_SHIFT) 112e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde#define FLEXCAN_ESR_BOFF_INT BIT(2) 113e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde#define FLEXCAN_ESR_ERR_INT BIT(1) 114e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde#define FLEXCAN_ESR_WAK_INT BIT(0) 115e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde#define FLEXCAN_ESR_ERR_BUS \ 116e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde (FLEXCAN_ESR_BIT1_ERR | FLEXCAN_ESR_BIT0_ERR | \ 117e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde FLEXCAN_ESR_ACK_ERR | FLEXCAN_ESR_CRC_ERR | \ 118e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde FLEXCAN_ESR_FRM_ERR | FLEXCAN_ESR_STF_ERR) 119e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde#define FLEXCAN_ESR_ERR_STATE \ 120e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde (FLEXCAN_ESR_TWRN_INT | FLEXCAN_ESR_RWRN_INT | FLEXCAN_ESR_BOFF_INT) 121e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde#define FLEXCAN_ESR_ERR_ALL \ 122e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde (FLEXCAN_ESR_ERR_BUS | FLEXCAN_ESR_ERR_STATE) 1236e9d554fa6e481a848358c215f129432262123c0Wolfgang Grandegger#define FLEXCAN_ESR_ALL_INT \ 1246e9d554fa6e481a848358c215f129432262123c0Wolfgang Grandegger (FLEXCAN_ESR_TWRN_INT | FLEXCAN_ESR_RWRN_INT | \ 1256e9d554fa6e481a848358c215f129432262123c0Wolfgang Grandegger FLEXCAN_ESR_BOFF_INT | FLEXCAN_ESR_ERR_INT) 126e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde 127e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde/* FLEXCAN interrupt flag register (IFLAG) bits */ 128e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde#define FLEXCAN_TX_BUF_ID 8 129e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde#define FLEXCAN_IFLAG_BUF(x) BIT(x) 130e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde#define FLEXCAN_IFLAG_RX_FIFO_OVERFLOW BIT(7) 131e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde#define FLEXCAN_IFLAG_RX_FIFO_WARN BIT(6) 132e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde#define FLEXCAN_IFLAG_RX_FIFO_AVAILABLE BIT(5) 133e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde#define FLEXCAN_IFLAG_DEFAULT \ 134e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde (FLEXCAN_IFLAG_RX_FIFO_OVERFLOW | FLEXCAN_IFLAG_RX_FIFO_AVAILABLE | \ 135e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde FLEXCAN_IFLAG_BUF(FLEXCAN_TX_BUF_ID)) 136e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde 137e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde/* FLEXCAN message buffers */ 138e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde#define FLEXCAN_MB_CNT_CODE(x) (((x) & 0xf) << 24) 139e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde#define FLEXCAN_MB_CNT_SRR BIT(22) 140e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde#define FLEXCAN_MB_CNT_IDE BIT(21) 141e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde#define FLEXCAN_MB_CNT_RTR BIT(20) 142e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde#define FLEXCAN_MB_CNT_LENGTH(x) (((x) & 0xf) << 16) 143e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde#define FLEXCAN_MB_CNT_TIMESTAMP(x) ((x) & 0xffff) 144e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde 145e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde#define FLEXCAN_MB_CODE_MASK (0xf0ffffff) 146e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde 1479b00b300e7bce032c467c36ca47fe2a776887fc2Marc Kleine-Budde#define FLEXCAN_TIMEOUT_US (50) 1489b00b300e7bce032c467c36ca47fe2a776887fc2Marc Kleine-Budde 149bb698ca41ba574b3066ebbc5766e5980ae0051caWolfgang Grandegger/* 150bb698ca41ba574b3066ebbc5766e5980ae0051caWolfgang Grandegger * FLEXCAN hardware feature flags 151bb698ca41ba574b3066ebbc5766e5980ae0051caWolfgang Grandegger * 152bb698ca41ba574b3066ebbc5766e5980ae0051caWolfgang Grandegger * Below is some version info we got: 153bb698ca41ba574b3066ebbc5766e5980ae0051caWolfgang Grandegger * SOC Version IP-Version Glitch- [TR]WRN_INT 154bb698ca41ba574b3066ebbc5766e5980ae0051caWolfgang Grandegger * Filter? connected? 155bb698ca41ba574b3066ebbc5766e5980ae0051caWolfgang Grandegger * MX25 FlexCAN2 03.00.00.00 no no 156bb698ca41ba574b3066ebbc5766e5980ae0051caWolfgang Grandegger * MX28 FlexCAN2 03.00.04.00 yes yes 157bb698ca41ba574b3066ebbc5766e5980ae0051caWolfgang Grandegger * MX35 FlexCAN2 03.00.00.00 no no 158bb698ca41ba574b3066ebbc5766e5980ae0051caWolfgang Grandegger * MX53 FlexCAN2 03.00.00.00 yes no 159bb698ca41ba574b3066ebbc5766e5980ae0051caWolfgang Grandegger * MX6s FlexCAN3 10.00.12.00 yes yes 160bb698ca41ba574b3066ebbc5766e5980ae0051caWolfgang Grandegger * 161bb698ca41ba574b3066ebbc5766e5980ae0051caWolfgang Grandegger * Some SOCs do not have the RX_WARN & TX_WARN interrupt line connected. 162bb698ca41ba574b3066ebbc5766e5980ae0051caWolfgang Grandegger */ 1634f72e5f00dea3eca9139a23cf70fbf18d62fd1dbWolfgang Grandegger#define FLEXCAN_HAS_V10_FEATURES BIT(1) /* For core version >= 10 */ 164bb698ca41ba574b3066ebbc5766e5980ae0051caWolfgang Grandegger#define FLEXCAN_HAS_BROKEN_ERR_STATE BIT(2) /* [TR]WRN_INT not connected */ 1654f72e5f00dea3eca9139a23cf70fbf18d62fd1dbWolfgang Grandegger 166e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde/* Structure of the message buffer */ 167e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Buddestruct flexcan_mb { 168e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde u32 can_ctrl; 169e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde u32 can_id; 170e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde u32 data[2]; 171e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde}; 172e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde 173e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde/* Structure of the hardware registers */ 174e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Buddestruct flexcan_regs { 175e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde u32 mcr; /* 0x00 */ 176e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde u32 ctrl; /* 0x04 */ 177e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde u32 timer; /* 0x08 */ 178e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde u32 _reserved1; /* 0x0c */ 179e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde u32 rxgmask; /* 0x10 */ 180e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde u32 rx14mask; /* 0x14 */ 181e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde u32 rx15mask; /* 0x18 */ 182e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde u32 ecr; /* 0x1c */ 183e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde u32 esr; /* 0x20 */ 184e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde u32 imask2; /* 0x24 */ 185e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde u32 imask1; /* 0x28 */ 186e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde u32 iflag2; /* 0x2c */ 187e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde u32 iflag1; /* 0x30 */ 18830c1e672044d98e5c4cff5fcbdb34b55a2df0c0fHui Wang u32 crl2; /* 0x34 */ 18930c1e672044d98e5c4cff5fcbdb34b55a2df0c0fHui Wang u32 esr2; /* 0x38 */ 19030c1e672044d98e5c4cff5fcbdb34b55a2df0c0fHui Wang u32 imeur; /* 0x3c */ 19130c1e672044d98e5c4cff5fcbdb34b55a2df0c0fHui Wang u32 lrfr; /* 0x40 */ 19230c1e672044d98e5c4cff5fcbdb34b55a2df0c0fHui Wang u32 crcr; /* 0x44 */ 19330c1e672044d98e5c4cff5fcbdb34b55a2df0c0fHui Wang u32 rxfgmask; /* 0x48 */ 19430c1e672044d98e5c4cff5fcbdb34b55a2df0c0fHui Wang u32 rxfir; /* 0x4c */ 19530c1e672044d98e5c4cff5fcbdb34b55a2df0c0fHui Wang u32 _reserved3[12]; 196e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde struct flexcan_mb cantxfg[64]; 197e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde}; 198e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde 19930c1e672044d98e5c4cff5fcbdb34b55a2df0c0fHui Wangstruct flexcan_devtype_data { 2004f72e5f00dea3eca9139a23cf70fbf18d62fd1dbWolfgang Grandegger u32 features; /* hardware controller features */ 20130c1e672044d98e5c4cff5fcbdb34b55a2df0c0fHui Wang}; 20230c1e672044d98e5c4cff5fcbdb34b55a2df0c0fHui Wang 203e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Buddestruct flexcan_priv { 204e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde struct can_priv can; 205e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde struct net_device *dev; 206e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde struct napi_struct napi; 207e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde 208e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde void __iomem *base; 209e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde u32 reg_esr; 210e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde u32 reg_ctrl_default; 211e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde 2123d42a379b6fa5b46058e3302b1802b29f64865bbSteffen Trumtrar struct clk *clk_ipg; 2133d42a379b6fa5b46058e3302b1802b29f64865bbSteffen Trumtrar struct clk *clk_per; 214e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde struct flexcan_platform_data *pdata; 215dda0b3bd1cbb66ee869d589f7d719f703d7c38a1Marc Kleine-Budde const struct flexcan_devtype_data *devtype_data; 216b7c4114b07bbacfe0aee1d04ad1ade9e42309620Fabio Estevam struct regulator *reg_xceiver; 21730c1e672044d98e5c4cff5fcbdb34b55a2df0c0fHui Wang}; 21830c1e672044d98e5c4cff5fcbdb34b55a2df0c0fHui Wang 21930c1e672044d98e5c4cff5fcbdb34b55a2df0c0fHui Wangstatic struct flexcan_devtype_data fsl_p1010_devtype_data = { 2204f72e5f00dea3eca9139a23cf70fbf18d62fd1dbWolfgang Grandegger .features = FLEXCAN_HAS_BROKEN_ERR_STATE, 22130c1e672044d98e5c4cff5fcbdb34b55a2df0c0fHui Wang}; 2224f72e5f00dea3eca9139a23cf70fbf18d62fd1dbWolfgang Grandeggerstatic struct flexcan_devtype_data fsl_imx28_devtype_data; 22330c1e672044d98e5c4cff5fcbdb34b55a2df0c0fHui Wangstatic struct flexcan_devtype_data fsl_imx6q_devtype_data = { 224bb698ca41ba574b3066ebbc5766e5980ae0051caWolfgang Grandegger .features = FLEXCAN_HAS_V10_FEATURES, 225e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde}; 226e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde 227194b9a4cb91713ddb60c9f98f7212f6d8cb8e05fMarc Kleine-Buddestatic const struct can_bittiming_const flexcan_bittiming_const = { 228e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde .name = DRV_NAME, 229e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde .tseg1_min = 4, 230e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde .tseg1_max = 16, 231e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde .tseg2_min = 2, 232e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde .tseg2_max = 8, 233e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde .sjw_max = 4, 234e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde .brp_min = 1, 235e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde .brp_max = 256, 236e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde .brp_inc = 1, 237e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde}; 238e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde 239e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde/* 2400e4b949e6620689b1d3142e20bca2c9d1f918fdaArnd Bergmann * Abstract off the read/write for arm versus ppc. This 2410e4b949e6620689b1d3142e20bca2c9d1f918fdaArnd Bergmann * assumes that PPC uses big-endian registers and everything 2420e4b949e6620689b1d3142e20bca2c9d1f918fdaArnd Bergmann * else uses little-endian registers, independent of CPU 2430e4b949e6620689b1d3142e20bca2c9d1f918fdaArnd Bergmann * endianess. 24461e271ee64f1da6f69e56419ecf2ca7330884564holt@sgi.com */ 2450e4b949e6620689b1d3142e20bca2c9d1f918fdaArnd Bergmann#if defined(CONFIG_PPC) 24661e271ee64f1da6f69e56419ecf2ca7330884564holt@sgi.comstatic inline u32 flexcan_read(void __iomem *addr) 24761e271ee64f1da6f69e56419ecf2ca7330884564holt@sgi.com{ 24861e271ee64f1da6f69e56419ecf2ca7330884564holt@sgi.com return in_be32(addr); 24961e271ee64f1da6f69e56419ecf2ca7330884564holt@sgi.com} 25061e271ee64f1da6f69e56419ecf2ca7330884564holt@sgi.com 25161e271ee64f1da6f69e56419ecf2ca7330884564holt@sgi.comstatic inline void flexcan_write(u32 val, void __iomem *addr) 25261e271ee64f1da6f69e56419ecf2ca7330884564holt@sgi.com{ 25361e271ee64f1da6f69e56419ecf2ca7330884564holt@sgi.com out_be32(addr, val); 25461e271ee64f1da6f69e56419ecf2ca7330884564holt@sgi.com} 25561e271ee64f1da6f69e56419ecf2ca7330884564holt@sgi.com#else 25661e271ee64f1da6f69e56419ecf2ca7330884564holt@sgi.comstatic inline u32 flexcan_read(void __iomem *addr) 25761e271ee64f1da6f69e56419ecf2ca7330884564holt@sgi.com{ 25861e271ee64f1da6f69e56419ecf2ca7330884564holt@sgi.com return readl(addr); 25961e271ee64f1da6f69e56419ecf2ca7330884564holt@sgi.com} 26061e271ee64f1da6f69e56419ecf2ca7330884564holt@sgi.com 26161e271ee64f1da6f69e56419ecf2ca7330884564holt@sgi.comstatic inline void flexcan_write(u32 val, void __iomem *addr) 26261e271ee64f1da6f69e56419ecf2ca7330884564holt@sgi.com{ 26361e271ee64f1da6f69e56419ecf2ca7330884564holt@sgi.com writel(val, addr); 26461e271ee64f1da6f69e56419ecf2ca7330884564holt@sgi.com} 26561e271ee64f1da6f69e56419ecf2ca7330884564holt@sgi.com#endif 26661e271ee64f1da6f69e56419ecf2ca7330884564holt@sgi.com 267f003698e23f6f56a791774f14d0ac35d04872490Marc Kleine-Buddestatic inline int flexcan_transceiver_enable(const struct flexcan_priv *priv) 268f003698e23f6f56a791774f14d0ac35d04872490Marc Kleine-Budde{ 269f003698e23f6f56a791774f14d0ac35d04872490Marc Kleine-Budde if (!priv->reg_xceiver) 270f003698e23f6f56a791774f14d0ac35d04872490Marc Kleine-Budde return 0; 271f003698e23f6f56a791774f14d0ac35d04872490Marc Kleine-Budde 272f003698e23f6f56a791774f14d0ac35d04872490Marc Kleine-Budde return regulator_enable(priv->reg_xceiver); 273f003698e23f6f56a791774f14d0ac35d04872490Marc Kleine-Budde} 274f003698e23f6f56a791774f14d0ac35d04872490Marc Kleine-Budde 275f003698e23f6f56a791774f14d0ac35d04872490Marc Kleine-Buddestatic inline int flexcan_transceiver_disable(const struct flexcan_priv *priv) 276f003698e23f6f56a791774f14d0ac35d04872490Marc Kleine-Budde{ 277f003698e23f6f56a791774f14d0ac35d04872490Marc Kleine-Budde if (!priv->reg_xceiver) 278f003698e23f6f56a791774f14d0ac35d04872490Marc Kleine-Budde return 0; 279f003698e23f6f56a791774f14d0ac35d04872490Marc Kleine-Budde 280f003698e23f6f56a791774f14d0ac35d04872490Marc Kleine-Budde return regulator_disable(priv->reg_xceiver); 281f003698e23f6f56a791774f14d0ac35d04872490Marc Kleine-Budde} 282f003698e23f6f56a791774f14d0ac35d04872490Marc Kleine-Budde 283e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Buddestatic inline int flexcan_has_and_handle_berr(const struct flexcan_priv *priv, 284e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde u32 reg_esr) 285e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde{ 286e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde return (priv->can.ctrlmode & CAN_CTRLMODE_BERR_REPORTING) && 287e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde (reg_esr & FLEXCAN_ESR_ERR_BUS); 288e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde} 289e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde 2909b00b300e7bce032c467c36ca47fe2a776887fc2Marc Kleine-Buddestatic int flexcan_chip_enable(struct flexcan_priv *priv) 291e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde{ 292e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde struct flexcan_regs __iomem *regs = priv->base; 2939b00b300e7bce032c467c36ca47fe2a776887fc2Marc Kleine-Budde unsigned int timeout = FLEXCAN_TIMEOUT_US / 10; 294e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde u32 reg; 295e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde 29661e271ee64f1da6f69e56419ecf2ca7330884564holt@sgi.com reg = flexcan_read(®s->mcr); 297e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde reg &= ~FLEXCAN_MCR_MDIS; 29861e271ee64f1da6f69e56419ecf2ca7330884564holt@sgi.com flexcan_write(reg, ®s->mcr); 299e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde 3009b00b300e7bce032c467c36ca47fe2a776887fc2Marc Kleine-Budde while (timeout-- && (flexcan_read(®s->mcr) & FLEXCAN_MCR_LPM_ACK)) 3019b00b300e7bce032c467c36ca47fe2a776887fc2Marc Kleine-Budde usleep_range(10, 20); 3029b00b300e7bce032c467c36ca47fe2a776887fc2Marc Kleine-Budde 3039b00b300e7bce032c467c36ca47fe2a776887fc2Marc Kleine-Budde if (flexcan_read(®s->mcr) & FLEXCAN_MCR_LPM_ACK) 3049b00b300e7bce032c467c36ca47fe2a776887fc2Marc Kleine-Budde return -ETIMEDOUT; 3059b00b300e7bce032c467c36ca47fe2a776887fc2Marc Kleine-Budde 3069b00b300e7bce032c467c36ca47fe2a776887fc2Marc Kleine-Budde return 0; 307e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde} 308e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde 3099b00b300e7bce032c467c36ca47fe2a776887fc2Marc Kleine-Buddestatic int flexcan_chip_disable(struct flexcan_priv *priv) 310e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde{ 311e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde struct flexcan_regs __iomem *regs = priv->base; 3129b00b300e7bce032c467c36ca47fe2a776887fc2Marc Kleine-Budde unsigned int timeout = FLEXCAN_TIMEOUT_US / 10; 313e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde u32 reg; 314e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde 31561e271ee64f1da6f69e56419ecf2ca7330884564holt@sgi.com reg = flexcan_read(®s->mcr); 316e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde reg |= FLEXCAN_MCR_MDIS; 31761e271ee64f1da6f69e56419ecf2ca7330884564holt@sgi.com flexcan_write(reg, ®s->mcr); 3189b00b300e7bce032c467c36ca47fe2a776887fc2Marc Kleine-Budde 3199b00b300e7bce032c467c36ca47fe2a776887fc2Marc Kleine-Budde while (timeout-- && !(flexcan_read(®s->mcr) & FLEXCAN_MCR_LPM_ACK)) 3209b00b300e7bce032c467c36ca47fe2a776887fc2Marc Kleine-Budde usleep_range(10, 20); 3219b00b300e7bce032c467c36ca47fe2a776887fc2Marc Kleine-Budde 3229b00b300e7bce032c467c36ca47fe2a776887fc2Marc Kleine-Budde if (!(flexcan_read(®s->mcr) & FLEXCAN_MCR_LPM_ACK)) 3239b00b300e7bce032c467c36ca47fe2a776887fc2Marc Kleine-Budde return -ETIMEDOUT; 3249b00b300e7bce032c467c36ca47fe2a776887fc2Marc Kleine-Budde 3259b00b300e7bce032c467c36ca47fe2a776887fc2Marc Kleine-Budde return 0; 326e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde} 327e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde 328b1aa1c7a2165b44ecce66286a3095cc6c7667d1cMarc Kleine-Buddestatic int flexcan_chip_freeze(struct flexcan_priv *priv) 329b1aa1c7a2165b44ecce66286a3095cc6c7667d1cMarc Kleine-Budde{ 330b1aa1c7a2165b44ecce66286a3095cc6c7667d1cMarc Kleine-Budde struct flexcan_regs __iomem *regs = priv->base; 331b1aa1c7a2165b44ecce66286a3095cc6c7667d1cMarc Kleine-Budde unsigned int timeout = 1000 * 1000 * 10 / priv->can.bittiming.bitrate; 332b1aa1c7a2165b44ecce66286a3095cc6c7667d1cMarc Kleine-Budde u32 reg; 333b1aa1c7a2165b44ecce66286a3095cc6c7667d1cMarc Kleine-Budde 334b1aa1c7a2165b44ecce66286a3095cc6c7667d1cMarc Kleine-Budde reg = flexcan_read(®s->mcr); 335b1aa1c7a2165b44ecce66286a3095cc6c7667d1cMarc Kleine-Budde reg |= FLEXCAN_MCR_HALT; 336b1aa1c7a2165b44ecce66286a3095cc6c7667d1cMarc Kleine-Budde flexcan_write(reg, ®s->mcr); 337b1aa1c7a2165b44ecce66286a3095cc6c7667d1cMarc Kleine-Budde 338b1aa1c7a2165b44ecce66286a3095cc6c7667d1cMarc Kleine-Budde while (timeout-- && !(flexcan_read(®s->mcr) & FLEXCAN_MCR_FRZ_ACK)) 339b1aa1c7a2165b44ecce66286a3095cc6c7667d1cMarc Kleine-Budde usleep_range(100, 200); 340b1aa1c7a2165b44ecce66286a3095cc6c7667d1cMarc Kleine-Budde 341b1aa1c7a2165b44ecce66286a3095cc6c7667d1cMarc Kleine-Budde if (!(flexcan_read(®s->mcr) & FLEXCAN_MCR_FRZ_ACK)) 342b1aa1c7a2165b44ecce66286a3095cc6c7667d1cMarc Kleine-Budde return -ETIMEDOUT; 343b1aa1c7a2165b44ecce66286a3095cc6c7667d1cMarc Kleine-Budde 344b1aa1c7a2165b44ecce66286a3095cc6c7667d1cMarc Kleine-Budde return 0; 345b1aa1c7a2165b44ecce66286a3095cc6c7667d1cMarc Kleine-Budde} 346b1aa1c7a2165b44ecce66286a3095cc6c7667d1cMarc Kleine-Budde 347b1aa1c7a2165b44ecce66286a3095cc6c7667d1cMarc Kleine-Buddestatic int flexcan_chip_unfreeze(struct flexcan_priv *priv) 348b1aa1c7a2165b44ecce66286a3095cc6c7667d1cMarc Kleine-Budde{ 349b1aa1c7a2165b44ecce66286a3095cc6c7667d1cMarc Kleine-Budde struct flexcan_regs __iomem *regs = priv->base; 350b1aa1c7a2165b44ecce66286a3095cc6c7667d1cMarc Kleine-Budde unsigned int timeout = FLEXCAN_TIMEOUT_US / 10; 351b1aa1c7a2165b44ecce66286a3095cc6c7667d1cMarc Kleine-Budde u32 reg; 352b1aa1c7a2165b44ecce66286a3095cc6c7667d1cMarc Kleine-Budde 353b1aa1c7a2165b44ecce66286a3095cc6c7667d1cMarc Kleine-Budde reg = flexcan_read(®s->mcr); 354b1aa1c7a2165b44ecce66286a3095cc6c7667d1cMarc Kleine-Budde reg &= ~FLEXCAN_MCR_HALT; 355b1aa1c7a2165b44ecce66286a3095cc6c7667d1cMarc Kleine-Budde flexcan_write(reg, ®s->mcr); 356b1aa1c7a2165b44ecce66286a3095cc6c7667d1cMarc Kleine-Budde 357b1aa1c7a2165b44ecce66286a3095cc6c7667d1cMarc Kleine-Budde while (timeout-- && (flexcan_read(®s->mcr) & FLEXCAN_MCR_FRZ_ACK)) 358b1aa1c7a2165b44ecce66286a3095cc6c7667d1cMarc Kleine-Budde usleep_range(10, 20); 359b1aa1c7a2165b44ecce66286a3095cc6c7667d1cMarc Kleine-Budde 360b1aa1c7a2165b44ecce66286a3095cc6c7667d1cMarc Kleine-Budde if (flexcan_read(®s->mcr) & FLEXCAN_MCR_FRZ_ACK) 361b1aa1c7a2165b44ecce66286a3095cc6c7667d1cMarc Kleine-Budde return -ETIMEDOUT; 362b1aa1c7a2165b44ecce66286a3095cc6c7667d1cMarc Kleine-Budde 363b1aa1c7a2165b44ecce66286a3095cc6c7667d1cMarc Kleine-Budde return 0; 364b1aa1c7a2165b44ecce66286a3095cc6c7667d1cMarc Kleine-Budde} 365b1aa1c7a2165b44ecce66286a3095cc6c7667d1cMarc Kleine-Budde 3664b5b82274a17f0ebbf02378df2ba7f36a3f5af19Marc Kleine-Buddestatic int flexcan_chip_softreset(struct flexcan_priv *priv) 3674b5b82274a17f0ebbf02378df2ba7f36a3f5af19Marc Kleine-Budde{ 3684b5b82274a17f0ebbf02378df2ba7f36a3f5af19Marc Kleine-Budde struct flexcan_regs __iomem *regs = priv->base; 3694b5b82274a17f0ebbf02378df2ba7f36a3f5af19Marc Kleine-Budde unsigned int timeout = FLEXCAN_TIMEOUT_US / 10; 3704b5b82274a17f0ebbf02378df2ba7f36a3f5af19Marc Kleine-Budde 3714b5b82274a17f0ebbf02378df2ba7f36a3f5af19Marc Kleine-Budde flexcan_write(FLEXCAN_MCR_SOFTRST, ®s->mcr); 3724b5b82274a17f0ebbf02378df2ba7f36a3f5af19Marc Kleine-Budde while (timeout-- && (flexcan_read(®s->mcr) & FLEXCAN_MCR_SOFTRST)) 3734b5b82274a17f0ebbf02378df2ba7f36a3f5af19Marc Kleine-Budde usleep_range(10, 20); 3744b5b82274a17f0ebbf02378df2ba7f36a3f5af19Marc Kleine-Budde 3754b5b82274a17f0ebbf02378df2ba7f36a3f5af19Marc Kleine-Budde if (flexcan_read(®s->mcr) & FLEXCAN_MCR_SOFTRST) 3764b5b82274a17f0ebbf02378df2ba7f36a3f5af19Marc Kleine-Budde return -ETIMEDOUT; 3774b5b82274a17f0ebbf02378df2ba7f36a3f5af19Marc Kleine-Budde 3784b5b82274a17f0ebbf02378df2ba7f36a3f5af19Marc Kleine-Budde return 0; 3794b5b82274a17f0ebbf02378df2ba7f36a3f5af19Marc Kleine-Budde} 3804b5b82274a17f0ebbf02378df2ba7f36a3f5af19Marc Kleine-Budde 381e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Buddestatic int flexcan_get_berr_counter(const struct net_device *dev, 382e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde struct can_berr_counter *bec) 383e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde{ 384e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde const struct flexcan_priv *priv = netdev_priv(dev); 385e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde struct flexcan_regs __iomem *regs = priv->base; 38661e271ee64f1da6f69e56419ecf2ca7330884564holt@sgi.com u32 reg = flexcan_read(®s->ecr); 387e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde 388e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde bec->txerr = (reg >> 0) & 0xff; 389e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde bec->rxerr = (reg >> 8) & 0xff; 390e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde 391e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde return 0; 392e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde} 393e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde 394e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Buddestatic int flexcan_start_xmit(struct sk_buff *skb, struct net_device *dev) 395e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde{ 396e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde const struct flexcan_priv *priv = netdev_priv(dev); 397e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde struct flexcan_regs __iomem *regs = priv->base; 398e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde struct can_frame *cf = (struct can_frame *)skb->data; 399e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde u32 can_id; 400e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde u32 ctrl = FLEXCAN_MB_CNT_CODE(0xc) | (cf->can_dlc << 16); 401e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde 402e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde if (can_dropped_invalid_skb(dev, skb)) 403e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde return NETDEV_TX_OK; 404e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde 405e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde netif_stop_queue(dev); 406e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde 407e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde if (cf->can_id & CAN_EFF_FLAG) { 408e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde can_id = cf->can_id & CAN_EFF_MASK; 409e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde ctrl |= FLEXCAN_MB_CNT_IDE | FLEXCAN_MB_CNT_SRR; 410e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde } else { 411e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde can_id = (cf->can_id & CAN_SFF_MASK) << 18; 412e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde } 413e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde 414e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde if (cf->can_id & CAN_RTR_FLAG) 415e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde ctrl |= FLEXCAN_MB_CNT_RTR; 416e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde 417e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde if (cf->can_dlc > 0) { 418e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde u32 data = be32_to_cpup((__be32 *)&cf->data[0]); 41961e271ee64f1da6f69e56419ecf2ca7330884564holt@sgi.com flexcan_write(data, ®s->cantxfg[FLEXCAN_TX_BUF_ID].data[0]); 420e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde } 421e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde if (cf->can_dlc > 3) { 422e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde u32 data = be32_to_cpup((__be32 *)&cf->data[4]); 42361e271ee64f1da6f69e56419ecf2ca7330884564holt@sgi.com flexcan_write(data, ®s->cantxfg[FLEXCAN_TX_BUF_ID].data[1]); 424e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde } 425e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde 4269a12349663061d25b49e6542d005fa7193a2cb44Reuben Dowle can_put_echo_skb(skb, dev, 0); 4279a12349663061d25b49e6542d005fa7193a2cb44Reuben Dowle 42861e271ee64f1da6f69e56419ecf2ca7330884564holt@sgi.com flexcan_write(can_id, ®s->cantxfg[FLEXCAN_TX_BUF_ID].can_id); 42961e271ee64f1da6f69e56419ecf2ca7330884564holt@sgi.com flexcan_write(ctrl, ®s->cantxfg[FLEXCAN_TX_BUF_ID].can_ctrl); 430e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde 431e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde return NETDEV_TX_OK; 432e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde} 433e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde 434e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Buddestatic void do_bus_err(struct net_device *dev, 435e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde struct can_frame *cf, u32 reg_esr) 436e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde{ 437e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde struct flexcan_priv *priv = netdev_priv(dev); 438e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde int rx_errors = 0, tx_errors = 0; 439e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde 440e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde cf->can_id |= CAN_ERR_PROT | CAN_ERR_BUSERROR; 441e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde 442e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde if (reg_esr & FLEXCAN_ESR_BIT1_ERR) { 443aabdfd6adb804d0aaba0188ade0f1afe42a52e31Wolfgang Grandegger netdev_dbg(dev, "BIT1_ERR irq\n"); 444e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde cf->data[2] |= CAN_ERR_PROT_BIT1; 445e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde tx_errors = 1; 446e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde } 447e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde if (reg_esr & FLEXCAN_ESR_BIT0_ERR) { 448aabdfd6adb804d0aaba0188ade0f1afe42a52e31Wolfgang Grandegger netdev_dbg(dev, "BIT0_ERR irq\n"); 449e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde cf->data[2] |= CAN_ERR_PROT_BIT0; 450e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde tx_errors = 1; 451e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde } 452e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde if (reg_esr & FLEXCAN_ESR_ACK_ERR) { 453aabdfd6adb804d0aaba0188ade0f1afe42a52e31Wolfgang Grandegger netdev_dbg(dev, "ACK_ERR irq\n"); 454e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde cf->can_id |= CAN_ERR_ACK; 455e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde cf->data[3] |= CAN_ERR_PROT_LOC_ACK; 456e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde tx_errors = 1; 457e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde } 458e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde if (reg_esr & FLEXCAN_ESR_CRC_ERR) { 459aabdfd6adb804d0aaba0188ade0f1afe42a52e31Wolfgang Grandegger netdev_dbg(dev, "CRC_ERR irq\n"); 460e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde cf->data[2] |= CAN_ERR_PROT_BIT; 461e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde cf->data[3] |= CAN_ERR_PROT_LOC_CRC_SEQ; 462e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde rx_errors = 1; 463e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde } 464e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde if (reg_esr & FLEXCAN_ESR_FRM_ERR) { 465aabdfd6adb804d0aaba0188ade0f1afe42a52e31Wolfgang Grandegger netdev_dbg(dev, "FRM_ERR irq\n"); 466e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde cf->data[2] |= CAN_ERR_PROT_FORM; 467e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde rx_errors = 1; 468e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde } 469e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde if (reg_esr & FLEXCAN_ESR_STF_ERR) { 470aabdfd6adb804d0aaba0188ade0f1afe42a52e31Wolfgang Grandegger netdev_dbg(dev, "STF_ERR irq\n"); 471e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde cf->data[2] |= CAN_ERR_PROT_STUFF; 472e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde rx_errors = 1; 473e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde } 474e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde 475e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde priv->can.can_stats.bus_error++; 476e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde if (rx_errors) 477e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde dev->stats.rx_errors++; 478e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde if (tx_errors) 479e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde dev->stats.tx_errors++; 480e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde} 481e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde 482e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Buddestatic int flexcan_poll_bus_err(struct net_device *dev, u32 reg_esr) 483e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde{ 484e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde struct sk_buff *skb; 485e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde struct can_frame *cf; 486e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde 487e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde skb = alloc_can_err_skb(dev, &cf); 488e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde if (unlikely(!skb)) 489e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde return 0; 490e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde 491e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde do_bus_err(dev, cf, reg_esr); 492e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde netif_receive_skb(skb); 493e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde 494e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde dev->stats.rx_packets++; 495e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde dev->stats.rx_bytes += cf->can_dlc; 496e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde 497e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde return 1; 498e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde} 499e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde 500e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Buddestatic void do_state(struct net_device *dev, 501e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde struct can_frame *cf, enum can_state new_state) 502e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde{ 503e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde struct flexcan_priv *priv = netdev_priv(dev); 504e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde struct can_berr_counter bec; 505e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde 506e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde flexcan_get_berr_counter(dev, &bec); 507e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde 508e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde switch (priv->can.state) { 509e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde case CAN_STATE_ERROR_ACTIVE: 510e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde /* 511e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde * from: ERROR_ACTIVE 512e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde * to : ERROR_WARNING, ERROR_PASSIVE, BUS_OFF 513e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde * => : there was a warning int 514e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde */ 515e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde if (new_state >= CAN_STATE_ERROR_WARNING && 516e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde new_state <= CAN_STATE_BUS_OFF) { 517aabdfd6adb804d0aaba0188ade0f1afe42a52e31Wolfgang Grandegger netdev_dbg(dev, "Error Warning IRQ\n"); 518e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde priv->can.can_stats.error_warning++; 519e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde 520e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde cf->can_id |= CAN_ERR_CRTL; 521e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde cf->data[1] = (bec.txerr > bec.rxerr) ? 522e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde CAN_ERR_CRTL_TX_WARNING : 523e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde CAN_ERR_CRTL_RX_WARNING; 524e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde } 525e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde case CAN_STATE_ERROR_WARNING: /* fallthrough */ 526e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde /* 527e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde * from: ERROR_ACTIVE, ERROR_WARNING 528e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde * to : ERROR_PASSIVE, BUS_OFF 529e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde * => : error passive int 530e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde */ 531e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde if (new_state >= CAN_STATE_ERROR_PASSIVE && 532e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde new_state <= CAN_STATE_BUS_OFF) { 533aabdfd6adb804d0aaba0188ade0f1afe42a52e31Wolfgang Grandegger netdev_dbg(dev, "Error Passive IRQ\n"); 534e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde priv->can.can_stats.error_passive++; 535e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde 536e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde cf->can_id |= CAN_ERR_CRTL; 537e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde cf->data[1] = (bec.txerr > bec.rxerr) ? 538e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde CAN_ERR_CRTL_TX_PASSIVE : 539e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde CAN_ERR_CRTL_RX_PASSIVE; 540e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde } 541e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde break; 542e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde case CAN_STATE_BUS_OFF: 543aabdfd6adb804d0aaba0188ade0f1afe42a52e31Wolfgang Grandegger netdev_err(dev, "BUG! " 544aabdfd6adb804d0aaba0188ade0f1afe42a52e31Wolfgang Grandegger "hardware recovered automatically from BUS_OFF\n"); 545e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde break; 546e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde default: 547e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde break; 548e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde } 549e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde 550e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde /* process state changes depending on the new state */ 551e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde switch (new_state) { 552e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde case CAN_STATE_ERROR_ACTIVE: 553aabdfd6adb804d0aaba0188ade0f1afe42a52e31Wolfgang Grandegger netdev_dbg(dev, "Error Active\n"); 554e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde cf->can_id |= CAN_ERR_PROT; 555e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde cf->data[2] = CAN_ERR_PROT_ACTIVE; 556e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde break; 557e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde case CAN_STATE_BUS_OFF: 558e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde cf->can_id |= CAN_ERR_BUSOFF; 559e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde can_bus_off(dev); 560e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde break; 561e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde default: 562e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde break; 563e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde } 564e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde} 565e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde 566e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Buddestatic int flexcan_poll_state(struct net_device *dev, u32 reg_esr) 567e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde{ 568e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde struct flexcan_priv *priv = netdev_priv(dev); 569e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde struct sk_buff *skb; 570e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde struct can_frame *cf; 571e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde enum can_state new_state; 572e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde int flt; 573e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde 574e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde flt = reg_esr & FLEXCAN_ESR_FLT_CONF_MASK; 575e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde if (likely(flt == FLEXCAN_ESR_FLT_CONF_ACTIVE)) { 576e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde if (likely(!(reg_esr & (FLEXCAN_ESR_TX_WRN | 577e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde FLEXCAN_ESR_RX_WRN)))) 578e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde new_state = CAN_STATE_ERROR_ACTIVE; 579e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde else 580e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde new_state = CAN_STATE_ERROR_WARNING; 581e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde } else if (unlikely(flt == FLEXCAN_ESR_FLT_CONF_PASSIVE)) 582e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde new_state = CAN_STATE_ERROR_PASSIVE; 583e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde else 584e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde new_state = CAN_STATE_BUS_OFF; 585e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde 586e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde /* state hasn't changed */ 587e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde if (likely(new_state == priv->can.state)) 588e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde return 0; 589e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde 590e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde skb = alloc_can_err_skb(dev, &cf); 591e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde if (unlikely(!skb)) 592e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde return 0; 593e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde 594e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde do_state(dev, cf, new_state); 595e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde priv->can.state = new_state; 596e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde netif_receive_skb(skb); 597e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde 598e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde dev->stats.rx_packets++; 599e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde dev->stats.rx_bytes += cf->can_dlc; 600e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde 601e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde return 1; 602e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde} 603e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde 604e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Buddestatic void flexcan_read_fifo(const struct net_device *dev, 605e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde struct can_frame *cf) 606e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde{ 607e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde const struct flexcan_priv *priv = netdev_priv(dev); 608e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde struct flexcan_regs __iomem *regs = priv->base; 609e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde struct flexcan_mb __iomem *mb = ®s->cantxfg[0]; 610e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde u32 reg_ctrl, reg_id; 611e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde 61261e271ee64f1da6f69e56419ecf2ca7330884564holt@sgi.com reg_ctrl = flexcan_read(&mb->can_ctrl); 61361e271ee64f1da6f69e56419ecf2ca7330884564holt@sgi.com reg_id = flexcan_read(&mb->can_id); 614e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde if (reg_ctrl & FLEXCAN_MB_CNT_IDE) 615e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde cf->can_id = ((reg_id >> 0) & CAN_EFF_MASK) | CAN_EFF_FLAG; 616e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde else 617e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde cf->can_id = (reg_id >> 18) & CAN_SFF_MASK; 618e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde 619e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde if (reg_ctrl & FLEXCAN_MB_CNT_RTR) 620e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde cf->can_id |= CAN_RTR_FLAG; 621e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde cf->can_dlc = get_can_dlc((reg_ctrl >> 16) & 0xf); 622e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde 62361e271ee64f1da6f69e56419ecf2ca7330884564holt@sgi.com *(__be32 *)(cf->data + 0) = cpu_to_be32(flexcan_read(&mb->data[0])); 62461e271ee64f1da6f69e56419ecf2ca7330884564holt@sgi.com *(__be32 *)(cf->data + 4) = cpu_to_be32(flexcan_read(&mb->data[1])); 625e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde 626e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde /* mark as read */ 62761e271ee64f1da6f69e56419ecf2ca7330884564holt@sgi.com flexcan_write(FLEXCAN_IFLAG_RX_FIFO_AVAILABLE, ®s->iflag1); 62861e271ee64f1da6f69e56419ecf2ca7330884564holt@sgi.com flexcan_read(®s->timer); 629e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde} 630e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde 631e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Buddestatic int flexcan_read_frame(struct net_device *dev) 632e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde{ 633e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde struct net_device_stats *stats = &dev->stats; 634e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde struct can_frame *cf; 635e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde struct sk_buff *skb; 636e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde 637e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde skb = alloc_can_skb(dev, &cf); 638e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde if (unlikely(!skb)) { 639e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde stats->rx_dropped++; 640e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde return 0; 641e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde } 642e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde 643e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde flexcan_read_fifo(dev, cf); 644e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde netif_receive_skb(skb); 645e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde 646e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde stats->rx_packets++; 647e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde stats->rx_bytes += cf->can_dlc; 648e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde 649adccadb92f0571fd0f9b2ac8011057a7de9e3e63Fabio Baltieri can_led_event(dev, CAN_LED_EVENT_RX); 650adccadb92f0571fd0f9b2ac8011057a7de9e3e63Fabio Baltieri 651e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde return 1; 652e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde} 653e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde 654e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Buddestatic int flexcan_poll(struct napi_struct *napi, int quota) 655e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde{ 656e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde struct net_device *dev = napi->dev; 657e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde const struct flexcan_priv *priv = netdev_priv(dev); 658e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde struct flexcan_regs __iomem *regs = priv->base; 659e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde u32 reg_iflag1, reg_esr; 660e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde int work_done = 0; 661e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde 662e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde /* 663e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde * The error bits are cleared on read, 664e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde * use saved value from irq handler. 665e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde */ 66661e271ee64f1da6f69e56419ecf2ca7330884564holt@sgi.com reg_esr = flexcan_read(®s->esr) | priv->reg_esr; 667e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde 668e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde /* handle state changes */ 669e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde work_done += flexcan_poll_state(dev, reg_esr); 670e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde 671e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde /* handle RX-FIFO */ 67261e271ee64f1da6f69e56419ecf2ca7330884564holt@sgi.com reg_iflag1 = flexcan_read(®s->iflag1); 673e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde while (reg_iflag1 & FLEXCAN_IFLAG_RX_FIFO_AVAILABLE && 674e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde work_done < quota) { 675e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde work_done += flexcan_read_frame(dev); 67661e271ee64f1da6f69e56419ecf2ca7330884564holt@sgi.com reg_iflag1 = flexcan_read(®s->iflag1); 677e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde } 678e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde 679e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde /* report bus errors */ 680e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde if (flexcan_has_and_handle_berr(priv, reg_esr) && work_done < quota) 681e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde work_done += flexcan_poll_bus_err(dev, reg_esr); 682e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde 683e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde if (work_done < quota) { 684e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde napi_complete(napi); 685e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde /* enable IRQs */ 68661e271ee64f1da6f69e56419ecf2ca7330884564holt@sgi.com flexcan_write(FLEXCAN_IFLAG_DEFAULT, ®s->imask1); 68761e271ee64f1da6f69e56419ecf2ca7330884564holt@sgi.com flexcan_write(priv->reg_ctrl_default, ®s->ctrl); 688e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde } 689e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde 690e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde return work_done; 691e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde} 692e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde 693e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Buddestatic irqreturn_t flexcan_irq(int irq, void *dev_id) 694e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde{ 695e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde struct net_device *dev = dev_id; 696e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde struct net_device_stats *stats = &dev->stats; 697e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde struct flexcan_priv *priv = netdev_priv(dev); 698e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde struct flexcan_regs __iomem *regs = priv->base; 699e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde u32 reg_iflag1, reg_esr; 700e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde 70161e271ee64f1da6f69e56419ecf2ca7330884564holt@sgi.com reg_iflag1 = flexcan_read(®s->iflag1); 70261e271ee64f1da6f69e56419ecf2ca7330884564holt@sgi.com reg_esr = flexcan_read(®s->esr); 7036e9d554fa6e481a848358c215f129432262123c0Wolfgang Grandegger /* ACK all bus error and state change IRQ sources */ 7046e9d554fa6e481a848358c215f129432262123c0Wolfgang Grandegger if (reg_esr & FLEXCAN_ESR_ALL_INT) 7056e9d554fa6e481a848358c215f129432262123c0Wolfgang Grandegger flexcan_write(reg_esr & FLEXCAN_ESR_ALL_INT, ®s->esr); 706e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde 707e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde /* 708e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde * schedule NAPI in case of: 709e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde * - rx IRQ 710e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde * - state change IRQ 711e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde * - bus error IRQ and bus error reporting is activated 712e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde */ 713e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde if ((reg_iflag1 & FLEXCAN_IFLAG_RX_FIFO_AVAILABLE) || 714e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde (reg_esr & FLEXCAN_ESR_ERR_STATE) || 715e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde flexcan_has_and_handle_berr(priv, reg_esr)) { 716e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde /* 717e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde * The error bits are cleared on read, 718e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde * save them for later use. 719e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde */ 720e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde priv->reg_esr = reg_esr & FLEXCAN_ESR_ERR_BUS; 72161e271ee64f1da6f69e56419ecf2ca7330884564holt@sgi.com flexcan_write(FLEXCAN_IFLAG_DEFAULT & 72261e271ee64f1da6f69e56419ecf2ca7330884564holt@sgi.com ~FLEXCAN_IFLAG_RX_FIFO_AVAILABLE, ®s->imask1); 72361e271ee64f1da6f69e56419ecf2ca7330884564holt@sgi.com flexcan_write(priv->reg_ctrl_default & ~FLEXCAN_CTRL_ERR_ALL, 724e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde ®s->ctrl); 725e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde napi_schedule(&priv->napi); 726e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde } 727e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde 728e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde /* FIFO overflow */ 729e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde if (reg_iflag1 & FLEXCAN_IFLAG_RX_FIFO_OVERFLOW) { 73061e271ee64f1da6f69e56419ecf2ca7330884564holt@sgi.com flexcan_write(FLEXCAN_IFLAG_RX_FIFO_OVERFLOW, ®s->iflag1); 731e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde dev->stats.rx_over_errors++; 732e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde dev->stats.rx_errors++; 733e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde } 734e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde 735e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde /* transmission complete interrupt */ 736e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde if (reg_iflag1 & (1 << FLEXCAN_TX_BUF_ID)) { 7379a12349663061d25b49e6542d005fa7193a2cb44Reuben Dowle stats->tx_bytes += can_get_echo_skb(dev, 0); 738e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde stats->tx_packets++; 739adccadb92f0571fd0f9b2ac8011057a7de9e3e63Fabio Baltieri can_led_event(dev, CAN_LED_EVENT_TX); 74061e271ee64f1da6f69e56419ecf2ca7330884564holt@sgi.com flexcan_write((1 << FLEXCAN_TX_BUF_ID), ®s->iflag1); 741e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde netif_wake_queue(dev); 742e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde } 743e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde 744e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde return IRQ_HANDLED; 745e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde} 746e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde 747e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Buddestatic void flexcan_set_bittiming(struct net_device *dev) 748e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde{ 749e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde const struct flexcan_priv *priv = netdev_priv(dev); 750e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde const struct can_bittiming *bt = &priv->can.bittiming; 751e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde struct flexcan_regs __iomem *regs = priv->base; 752e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde u32 reg; 753e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde 75461e271ee64f1da6f69e56419ecf2ca7330884564holt@sgi.com reg = flexcan_read(®s->ctrl); 755e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde reg &= ~(FLEXCAN_CTRL_PRESDIV(0xff) | 756e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde FLEXCAN_CTRL_RJW(0x3) | 757e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde FLEXCAN_CTRL_PSEG1(0x7) | 758e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde FLEXCAN_CTRL_PSEG2(0x7) | 759e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde FLEXCAN_CTRL_PROPSEG(0x7) | 760e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde FLEXCAN_CTRL_LPB | 761e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde FLEXCAN_CTRL_SMP | 762e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde FLEXCAN_CTRL_LOM); 763e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde 764e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde reg |= FLEXCAN_CTRL_PRESDIV(bt->brp - 1) | 765e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde FLEXCAN_CTRL_PSEG1(bt->phase_seg1 - 1) | 766e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde FLEXCAN_CTRL_PSEG2(bt->phase_seg2 - 1) | 767e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde FLEXCAN_CTRL_RJW(bt->sjw - 1) | 768e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde FLEXCAN_CTRL_PROPSEG(bt->prop_seg - 1); 769e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde 770e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde if (priv->can.ctrlmode & CAN_CTRLMODE_LOOPBACK) 771e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde reg |= FLEXCAN_CTRL_LPB; 772e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde if (priv->can.ctrlmode & CAN_CTRLMODE_LISTENONLY) 773e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde reg |= FLEXCAN_CTRL_LOM; 774e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde if (priv->can.ctrlmode & CAN_CTRLMODE_3_SAMPLES) 775e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde reg |= FLEXCAN_CTRL_SMP; 776e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde 777aabdfd6adb804d0aaba0188ade0f1afe42a52e31Wolfgang Grandegger netdev_info(dev, "writing ctrl=0x%08x\n", reg); 77861e271ee64f1da6f69e56419ecf2ca7330884564holt@sgi.com flexcan_write(reg, ®s->ctrl); 779e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde 780e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde /* print chip status */ 781aabdfd6adb804d0aaba0188ade0f1afe42a52e31Wolfgang Grandegger netdev_dbg(dev, "%s: mcr=0x%08x ctrl=0x%08x\n", __func__, 782aabdfd6adb804d0aaba0188ade0f1afe42a52e31Wolfgang Grandegger flexcan_read(®s->mcr), flexcan_read(®s->ctrl)); 783e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde} 784e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde 785e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde/* 786e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde * flexcan_chip_start 787e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde * 788e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde * this functions is entered with clocks enabled 789e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde * 790e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde */ 791e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Buddestatic int flexcan_chip_start(struct net_device *dev) 792e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde{ 793e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde struct flexcan_priv *priv = netdev_priv(dev); 794e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde struct flexcan_regs __iomem *regs = priv->base; 795e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde int err; 796e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde u32 reg_mcr, reg_ctrl; 797e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde 798e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde /* enable module */ 7999b00b300e7bce032c467c36ca47fe2a776887fc2Marc Kleine-Budde err = flexcan_chip_enable(priv); 8009b00b300e7bce032c467c36ca47fe2a776887fc2Marc Kleine-Budde if (err) 8019b00b300e7bce032c467c36ca47fe2a776887fc2Marc Kleine-Budde return err; 802e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde 803e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde /* soft reset */ 8044b5b82274a17f0ebbf02378df2ba7f36a3f5af19Marc Kleine-Budde err = flexcan_chip_softreset(priv); 8054b5b82274a17f0ebbf02378df2ba7f36a3f5af19Marc Kleine-Budde if (err) 806b1aa1c7a2165b44ecce66286a3095cc6c7667d1cMarc Kleine-Budde goto out_chip_disable; 807e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde 808e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde flexcan_set_bittiming(dev); 809e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde 810e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde /* 811e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde * MCR 812e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde * 813e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde * enable freeze 814e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde * enable fifo 815e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde * halt now 816e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde * only supervisor access 817e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde * enable warning int 818e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde * choose format C 8199a12349663061d25b49e6542d005fa7193a2cb44Reuben Dowle * disable local echo 820e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde * 821e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde */ 82261e271ee64f1da6f69e56419ecf2ca7330884564holt@sgi.com reg_mcr = flexcan_read(®s->mcr); 823d5a7b406c529e4595ce03dc8f6dcf7fa36f106faMarc Kleine-Budde reg_mcr &= ~FLEXCAN_MCR_MAXMB(0xff); 824e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde reg_mcr |= FLEXCAN_MCR_FRZ | FLEXCAN_MCR_FEN | FLEXCAN_MCR_HALT | 825e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde FLEXCAN_MCR_SUPV | FLEXCAN_MCR_WRN_EN | 826d5a7b406c529e4595ce03dc8f6dcf7fa36f106faMarc Kleine-Budde FLEXCAN_MCR_IDAM_C | FLEXCAN_MCR_SRX_DIS | 827d5a7b406c529e4595ce03dc8f6dcf7fa36f106faMarc Kleine-Budde FLEXCAN_MCR_MAXMB(FLEXCAN_TX_BUF_ID); 828aabdfd6adb804d0aaba0188ade0f1afe42a52e31Wolfgang Grandegger netdev_dbg(dev, "%s: writing mcr=0x%08x", __func__, reg_mcr); 82961e271ee64f1da6f69e56419ecf2ca7330884564holt@sgi.com flexcan_write(reg_mcr, ®s->mcr); 830e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde 831e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde /* 832e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde * CTRL 833e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde * 834e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde * disable timer sync feature 835e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde * 836e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde * disable auto busoff recovery 837e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde * transmit lowest buffer first 838e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde * 839e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde * enable tx and rx warning interrupt 840e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde * enable bus off interrupt 841e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde * (== FLEXCAN_CTRL_ERR_STATE) 842e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde */ 84361e271ee64f1da6f69e56419ecf2ca7330884564holt@sgi.com reg_ctrl = flexcan_read(®s->ctrl); 844e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde reg_ctrl &= ~FLEXCAN_CTRL_TSYN; 845e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde reg_ctrl |= FLEXCAN_CTRL_BOFF_REC | FLEXCAN_CTRL_LBUF | 8464f72e5f00dea3eca9139a23cf70fbf18d62fd1dbWolfgang Grandegger FLEXCAN_CTRL_ERR_STATE; 8474f72e5f00dea3eca9139a23cf70fbf18d62fd1dbWolfgang Grandegger /* 8484f72e5f00dea3eca9139a23cf70fbf18d62fd1dbWolfgang Grandegger * enable the "error interrupt" (FLEXCAN_CTRL_ERR_MSK), 8494f72e5f00dea3eca9139a23cf70fbf18d62fd1dbWolfgang Grandegger * on most Flexcan cores, too. Otherwise we don't get 8504f72e5f00dea3eca9139a23cf70fbf18d62fd1dbWolfgang Grandegger * any error warning or passive interrupts. 8514f72e5f00dea3eca9139a23cf70fbf18d62fd1dbWolfgang Grandegger */ 8524f72e5f00dea3eca9139a23cf70fbf18d62fd1dbWolfgang Grandegger if (priv->devtype_data->features & FLEXCAN_HAS_BROKEN_ERR_STATE || 8534f72e5f00dea3eca9139a23cf70fbf18d62fd1dbWolfgang Grandegger priv->can.ctrlmode & CAN_CTRLMODE_BERR_REPORTING) 8544f72e5f00dea3eca9139a23cf70fbf18d62fd1dbWolfgang Grandegger reg_ctrl |= FLEXCAN_CTRL_ERR_MSK; 855e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde 856e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde /* save for later use */ 857e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde priv->reg_ctrl_default = reg_ctrl; 858aabdfd6adb804d0aaba0188ade0f1afe42a52e31Wolfgang Grandegger netdev_dbg(dev, "%s: writing ctrl=0x%08x", __func__, reg_ctrl); 85961e271ee64f1da6f69e56419ecf2ca7330884564holt@sgi.com flexcan_write(reg_ctrl, ®s->ctrl); 860e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde 861d5a7b406c529e4595ce03dc8f6dcf7fa36f106faMarc Kleine-Budde /* Abort any pending TX, mark Mailbox as INACTIVE */ 862d5a7b406c529e4595ce03dc8f6dcf7fa36f106faMarc Kleine-Budde flexcan_write(FLEXCAN_MB_CNT_CODE(0x4), 863d5a7b406c529e4595ce03dc8f6dcf7fa36f106faMarc Kleine-Budde ®s->cantxfg[FLEXCAN_TX_BUF_ID].can_ctrl); 864d5a7b406c529e4595ce03dc8f6dcf7fa36f106faMarc Kleine-Budde 865e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde /* acceptance mask/acceptance code (accept everything) */ 86661e271ee64f1da6f69e56419ecf2ca7330884564holt@sgi.com flexcan_write(0x0, ®s->rxgmask); 86761e271ee64f1da6f69e56419ecf2ca7330884564holt@sgi.com flexcan_write(0x0, ®s->rx14mask); 86861e271ee64f1da6f69e56419ecf2ca7330884564holt@sgi.com flexcan_write(0x0, ®s->rx15mask); 869e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde 8704f72e5f00dea3eca9139a23cf70fbf18d62fd1dbWolfgang Grandegger if (priv->devtype_data->features & FLEXCAN_HAS_V10_FEATURES) 87130c1e672044d98e5c4cff5fcbdb34b55a2df0c0fHui Wang flexcan_write(0x0, ®s->rxfgmask); 87230c1e672044d98e5c4cff5fcbdb34b55a2df0c0fHui Wang 873f003698e23f6f56a791774f14d0ac35d04872490Marc Kleine-Budde err = flexcan_transceiver_enable(priv); 874f003698e23f6f56a791774f14d0ac35d04872490Marc Kleine-Budde if (err) 875b1aa1c7a2165b44ecce66286a3095cc6c7667d1cMarc Kleine-Budde goto out_chip_disable; 876e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde 877e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde /* synchronize with the can bus */ 878b1aa1c7a2165b44ecce66286a3095cc6c7667d1cMarc Kleine-Budde err = flexcan_chip_unfreeze(priv); 879b1aa1c7a2165b44ecce66286a3095cc6c7667d1cMarc Kleine-Budde if (err) 880b1aa1c7a2165b44ecce66286a3095cc6c7667d1cMarc Kleine-Budde goto out_transceiver_disable; 881e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde 882e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde priv->can.state = CAN_STATE_ERROR_ACTIVE; 883e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde 884e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde /* enable FIFO interrupts */ 88561e271ee64f1da6f69e56419ecf2ca7330884564holt@sgi.com flexcan_write(FLEXCAN_IFLAG_DEFAULT, ®s->imask1); 886e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde 887e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde /* print chip status */ 888aabdfd6adb804d0aaba0188ade0f1afe42a52e31Wolfgang Grandegger netdev_dbg(dev, "%s: reading mcr=0x%08x ctrl=0x%08x\n", __func__, 889aabdfd6adb804d0aaba0188ade0f1afe42a52e31Wolfgang Grandegger flexcan_read(®s->mcr), flexcan_read(®s->ctrl)); 890e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde 891e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde return 0; 892e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde 893b1aa1c7a2165b44ecce66286a3095cc6c7667d1cMarc Kleine-Budde out_transceiver_disable: 894b1aa1c7a2165b44ecce66286a3095cc6c7667d1cMarc Kleine-Budde flexcan_transceiver_disable(priv); 895b1aa1c7a2165b44ecce66286a3095cc6c7667d1cMarc Kleine-Budde out_chip_disable: 896e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde flexcan_chip_disable(priv); 897e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde return err; 898e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde} 899e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde 900e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde/* 901e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde * flexcan_chip_stop 902e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde * 903e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde * this functions is entered with clocks enabled 904e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde * 905e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde */ 906e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Buddestatic void flexcan_chip_stop(struct net_device *dev) 907e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde{ 908e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde struct flexcan_priv *priv = netdev_priv(dev); 909e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde struct flexcan_regs __iomem *regs = priv->base; 910e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde 911b1aa1c7a2165b44ecce66286a3095cc6c7667d1cMarc Kleine-Budde /* freeze + disable module */ 912b1aa1c7a2165b44ecce66286a3095cc6c7667d1cMarc Kleine-Budde flexcan_chip_freeze(priv); 913b1aa1c7a2165b44ecce66286a3095cc6c7667d1cMarc Kleine-Budde flexcan_chip_disable(priv); 914e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde 9155be93bdda64e85450598c6e97f79fb8f6acf30e0Marc Kleine-Budde /* Disable all interrupts */ 9165be93bdda64e85450598c6e97f79fb8f6acf30e0Marc Kleine-Budde flexcan_write(0, ®s->imask1); 9175be93bdda64e85450598c6e97f79fb8f6acf30e0Marc Kleine-Budde flexcan_write(priv->reg_ctrl_default & ~FLEXCAN_CTRL_ERR_ALL, 9185be93bdda64e85450598c6e97f79fb8f6acf30e0Marc Kleine-Budde ®s->ctrl); 9195be93bdda64e85450598c6e97f79fb8f6acf30e0Marc Kleine-Budde 920f003698e23f6f56a791774f14d0ac35d04872490Marc Kleine-Budde flexcan_transceiver_disable(priv); 921e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde priv->can.state = CAN_STATE_STOPPED; 922e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde 923e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde return; 924e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde} 925e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde 926e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Buddestatic int flexcan_open(struct net_device *dev) 927e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde{ 928e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde struct flexcan_priv *priv = netdev_priv(dev); 929e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde int err; 930e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde 931aa10181bdac99a623517f0f2bfa14cd98c749246Fabio Estevam err = clk_prepare_enable(priv->clk_ipg); 932aa10181bdac99a623517f0f2bfa14cd98c749246Fabio Estevam if (err) 933aa10181bdac99a623517f0f2bfa14cd98c749246Fabio Estevam return err; 934aa10181bdac99a623517f0f2bfa14cd98c749246Fabio Estevam 935aa10181bdac99a623517f0f2bfa14cd98c749246Fabio Estevam err = clk_prepare_enable(priv->clk_per); 936aa10181bdac99a623517f0f2bfa14cd98c749246Fabio Estevam if (err) 937aa10181bdac99a623517f0f2bfa14cd98c749246Fabio Estevam goto out_disable_ipg; 938e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde 939e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde err = open_candev(dev); 940e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde if (err) 941aa10181bdac99a623517f0f2bfa14cd98c749246Fabio Estevam goto out_disable_per; 942e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde 943e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde err = request_irq(dev->irq, flexcan_irq, IRQF_SHARED, dev->name, dev); 944e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde if (err) 945e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde goto out_close; 946e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde 947e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde /* start chip and queuing */ 948e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde err = flexcan_chip_start(dev); 949e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde if (err) 9507e9e148af01ef388efb6e2490805970be4622792Marc Kleine-Budde goto out_free_irq; 951adccadb92f0571fd0f9b2ac8011057a7de9e3e63Fabio Baltieri 952adccadb92f0571fd0f9b2ac8011057a7de9e3e63Fabio Baltieri can_led_event(dev, CAN_LED_EVENT_OPEN); 953adccadb92f0571fd0f9b2ac8011057a7de9e3e63Fabio Baltieri 954e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde napi_enable(&priv->napi); 955e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde netif_start_queue(dev); 956e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde 957e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde return 0; 958e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde 9597e9e148af01ef388efb6e2490805970be4622792Marc Kleine-Budde out_free_irq: 9607e9e148af01ef388efb6e2490805970be4622792Marc Kleine-Budde free_irq(dev->irq, dev); 961e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde out_close: 962e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde close_candev(dev); 963aa10181bdac99a623517f0f2bfa14cd98c749246Fabio Estevam out_disable_per: 9643d42a379b6fa5b46058e3302b1802b29f64865bbSteffen Trumtrar clk_disable_unprepare(priv->clk_per); 965aa10181bdac99a623517f0f2bfa14cd98c749246Fabio Estevam out_disable_ipg: 9663d42a379b6fa5b46058e3302b1802b29f64865bbSteffen Trumtrar clk_disable_unprepare(priv->clk_ipg); 967e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde 968e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde return err; 969e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde} 970e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde 971e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Buddestatic int flexcan_close(struct net_device *dev) 972e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde{ 973e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde struct flexcan_priv *priv = netdev_priv(dev); 974e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde 975e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde netif_stop_queue(dev); 976e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde napi_disable(&priv->napi); 977e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde flexcan_chip_stop(dev); 978e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde 979e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde free_irq(dev->irq, dev); 9803d42a379b6fa5b46058e3302b1802b29f64865bbSteffen Trumtrar clk_disable_unprepare(priv->clk_per); 9813d42a379b6fa5b46058e3302b1802b29f64865bbSteffen Trumtrar clk_disable_unprepare(priv->clk_ipg); 982e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde 983e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde close_candev(dev); 984e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde 985adccadb92f0571fd0f9b2ac8011057a7de9e3e63Fabio Baltieri can_led_event(dev, CAN_LED_EVENT_STOP); 986adccadb92f0571fd0f9b2ac8011057a7de9e3e63Fabio Baltieri 987e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde return 0; 988e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde} 989e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde 990e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Buddestatic int flexcan_set_mode(struct net_device *dev, enum can_mode mode) 991e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde{ 992e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde int err; 993e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde 994e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde switch (mode) { 995e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde case CAN_MODE_START: 996e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde err = flexcan_chip_start(dev); 997e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde if (err) 998e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde return err; 999e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde 1000e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde netif_wake_queue(dev); 1001e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde break; 1002e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde 1003e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde default: 1004e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde return -EOPNOTSUPP; 1005e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde } 1006e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde 1007e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde return 0; 1008e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde} 1009e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde 1010e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Buddestatic const struct net_device_ops flexcan_netdev_ops = { 1011e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde .ndo_open = flexcan_open, 1012e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde .ndo_stop = flexcan_close, 1013e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde .ndo_start_xmit = flexcan_start_xmit, 1014c971fa2ae42e73e9ccc2f5e93f268c8742da4c5dOliver Hartkopp .ndo_change_mtu = can_change_mtu, 1015e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde}; 1016e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde 10173c8ac0f2ad53a96ac58efe7c98fac2986d081dfcBill Pembertonstatic int register_flexcandev(struct net_device *dev) 1018e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde{ 1019e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde struct flexcan_priv *priv = netdev_priv(dev); 1020e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde struct flexcan_regs __iomem *regs = priv->base; 1021e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde u32 reg, err; 1022e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde 1023aa10181bdac99a623517f0f2bfa14cd98c749246Fabio Estevam err = clk_prepare_enable(priv->clk_ipg); 1024aa10181bdac99a623517f0f2bfa14cd98c749246Fabio Estevam if (err) 1025aa10181bdac99a623517f0f2bfa14cd98c749246Fabio Estevam return err; 1026aa10181bdac99a623517f0f2bfa14cd98c749246Fabio Estevam 1027aa10181bdac99a623517f0f2bfa14cd98c749246Fabio Estevam err = clk_prepare_enable(priv->clk_per); 1028aa10181bdac99a623517f0f2bfa14cd98c749246Fabio Estevam if (err) 1029aa10181bdac99a623517f0f2bfa14cd98c749246Fabio Estevam goto out_disable_ipg; 1030e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde 1031e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde /* select "bus clock", chip must be disabled */ 10329b00b300e7bce032c467c36ca47fe2a776887fc2Marc Kleine-Budde err = flexcan_chip_disable(priv); 10339b00b300e7bce032c467c36ca47fe2a776887fc2Marc Kleine-Budde if (err) 10349b00b300e7bce032c467c36ca47fe2a776887fc2Marc Kleine-Budde goto out_disable_per; 103561e271ee64f1da6f69e56419ecf2ca7330884564holt@sgi.com reg = flexcan_read(®s->ctrl); 1036e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde reg |= FLEXCAN_CTRL_CLK_SRC; 103761e271ee64f1da6f69e56419ecf2ca7330884564holt@sgi.com flexcan_write(reg, ®s->ctrl); 1038e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde 10399b00b300e7bce032c467c36ca47fe2a776887fc2Marc Kleine-Budde err = flexcan_chip_enable(priv); 10409b00b300e7bce032c467c36ca47fe2a776887fc2Marc Kleine-Budde if (err) 10419b00b300e7bce032c467c36ca47fe2a776887fc2Marc Kleine-Budde goto out_chip_disable; 1042e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde 1043e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde /* set freeze, halt and activate FIFO, restrict register access */ 104461e271ee64f1da6f69e56419ecf2ca7330884564holt@sgi.com reg = flexcan_read(®s->mcr); 1045e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde reg |= FLEXCAN_MCR_FRZ | FLEXCAN_MCR_HALT | 1046e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde FLEXCAN_MCR_FEN | FLEXCAN_MCR_SUPV; 104761e271ee64f1da6f69e56419ecf2ca7330884564holt@sgi.com flexcan_write(reg, ®s->mcr); 1048e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde 1049e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde /* 1050e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde * Currently we only support newer versions of this core 1051e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde * featuring a RX FIFO. Older cores found on some Coldfire 1052e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde * derivates are not yet supported. 1053e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde */ 105461e271ee64f1da6f69e56419ecf2ca7330884564holt@sgi.com reg = flexcan_read(®s->mcr); 1055e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde if (!(reg & FLEXCAN_MCR_FEN)) { 1056aabdfd6adb804d0aaba0188ade0f1afe42a52e31Wolfgang Grandegger netdev_err(dev, "Could not enable RX FIFO, unsupported core\n"); 1057e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde err = -ENODEV; 10589b00b300e7bce032c467c36ca47fe2a776887fc2Marc Kleine-Budde goto out_chip_disable; 1059e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde } 1060e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde 1061e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde err = register_candev(dev); 1062e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde 1063e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde /* disable core and turn off clocks */ 10649b00b300e7bce032c467c36ca47fe2a776887fc2Marc Kleine-Budde out_chip_disable: 1065e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde flexcan_chip_disable(priv); 10669b00b300e7bce032c467c36ca47fe2a776887fc2Marc Kleine-Budde out_disable_per: 10673d42a379b6fa5b46058e3302b1802b29f64865bbSteffen Trumtrar clk_disable_unprepare(priv->clk_per); 1068aa10181bdac99a623517f0f2bfa14cd98c749246Fabio Estevam out_disable_ipg: 10693d42a379b6fa5b46058e3302b1802b29f64865bbSteffen Trumtrar clk_disable_unprepare(priv->clk_ipg); 1070e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde 1071e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde return err; 1072e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde} 1073e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde 10743c8ac0f2ad53a96ac58efe7c98fac2986d081dfcBill Pembertonstatic void unregister_flexcandev(struct net_device *dev) 1075e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde{ 1076e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde unregister_candev(dev); 1077e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde} 1078e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde 107930c1e672044d98e5c4cff5fcbdb34b55a2df0c0fHui Wangstatic const struct of_device_id flexcan_of_match[] = { 108030c1e672044d98e5c4cff5fcbdb34b55a2df0c0fHui Wang { .compatible = "fsl,imx6q-flexcan", .data = &fsl_imx6q_devtype_data, }, 1081e358784297992b012e8071764d996191dd2b1a54Marc Kleine-Budde { .compatible = "fsl,imx28-flexcan", .data = &fsl_imx28_devtype_data, }, 1082e358784297992b012e8071764d996191dd2b1a54Marc Kleine-Budde { .compatible = "fsl,p1010-flexcan", .data = &fsl_p1010_devtype_data, }, 108330c1e672044d98e5c4cff5fcbdb34b55a2df0c0fHui Wang { /* sentinel */ }, 108430c1e672044d98e5c4cff5fcbdb34b55a2df0c0fHui Wang}; 10854358a9dc94cd70fa88797c87ed911bc8d866f37dMarc Kleine-BuddeMODULE_DEVICE_TABLE(of, flexcan_of_match); 108630c1e672044d98e5c4cff5fcbdb34b55a2df0c0fHui Wang 108730c1e672044d98e5c4cff5fcbdb34b55a2df0c0fHui Wangstatic const struct platform_device_id flexcan_id_table[] = { 108830c1e672044d98e5c4cff5fcbdb34b55a2df0c0fHui Wang { .name = "flexcan", .driver_data = (kernel_ulong_t)&fsl_p1010_devtype_data, }, 108930c1e672044d98e5c4cff5fcbdb34b55a2df0c0fHui Wang { /* sentinel */ }, 109030c1e672044d98e5c4cff5fcbdb34b55a2df0c0fHui Wang}; 10914358a9dc94cd70fa88797c87ed911bc8d866f37dMarc Kleine-BuddeMODULE_DEVICE_TABLE(platform, flexcan_id_table); 109230c1e672044d98e5c4cff5fcbdb34b55a2df0c0fHui Wang 10933c8ac0f2ad53a96ac58efe7c98fac2986d081dfcBill Pembertonstatic int flexcan_probe(struct platform_device *pdev) 1094e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde{ 109530c1e672044d98e5c4cff5fcbdb34b55a2df0c0fHui Wang const struct of_device_id *of_id; 1096dda0b3bd1cbb66ee869d589f7d719f703d7c38a1Marc Kleine-Budde const struct flexcan_devtype_data *devtype_data; 1097e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde struct net_device *dev; 1098e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde struct flexcan_priv *priv; 1099e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde struct resource *mem; 11003d42a379b6fa5b46058e3302b1802b29f64865bbSteffen Trumtrar struct clk *clk_ipg = NULL, *clk_per = NULL; 1101e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde void __iomem *base; 1102e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde int err, irq; 110397efe9aef1ae8922666d32f28d712745a86859e9holt@sgi.com u32 clock_freq = 0; 110497efe9aef1ae8922666d32f28d712745a86859e9holt@sgi.com 1105afc016d8360ceb19a1f37bf6579d5850d47d582dHui Wang if (pdev->dev.of_node) 1106afc016d8360ceb19a1f37bf6579d5850d47d582dHui Wang of_property_read_u32(pdev->dev.of_node, 1107afc016d8360ceb19a1f37bf6579d5850d47d582dHui Wang "clock-frequency", &clock_freq); 110897efe9aef1ae8922666d32f28d712745a86859e9holt@sgi.com 110997efe9aef1ae8922666d32f28d712745a86859e9holt@sgi.com if (!clock_freq) { 11103d42a379b6fa5b46058e3302b1802b29f64865bbSteffen Trumtrar clk_ipg = devm_clk_get(&pdev->dev, "ipg"); 11113d42a379b6fa5b46058e3302b1802b29f64865bbSteffen Trumtrar if (IS_ERR(clk_ipg)) { 11123d42a379b6fa5b46058e3302b1802b29f64865bbSteffen Trumtrar dev_err(&pdev->dev, "no ipg clock defined\n"); 1113933e4af4c590c63509ffadeb77fcd1d329ac9155Fabio Estevam return PTR_ERR(clk_ipg); 11143d42a379b6fa5b46058e3302b1802b29f64865bbSteffen Trumtrar } 11153d42a379b6fa5b46058e3302b1802b29f64865bbSteffen Trumtrar 11163d42a379b6fa5b46058e3302b1802b29f64865bbSteffen Trumtrar clk_per = devm_clk_get(&pdev->dev, "per"); 11173d42a379b6fa5b46058e3302b1802b29f64865bbSteffen Trumtrar if (IS_ERR(clk_per)) { 11183d42a379b6fa5b46058e3302b1802b29f64865bbSteffen Trumtrar dev_err(&pdev->dev, "no per clock defined\n"); 1119933e4af4c590c63509ffadeb77fcd1d329ac9155Fabio Estevam return PTR_ERR(clk_per); 112097efe9aef1ae8922666d32f28d712745a86859e9holt@sgi.com } 11211a3e5173f5e72cbf7f0c8927b33082e361c16d72Marc Kleine-Budde clock_freq = clk_get_rate(clk_per); 1122e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde } 1123e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde 1124e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde mem = platform_get_resource(pdev, IORESOURCE_MEM, 0); 1125e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde irq = platform_get_irq(pdev, 0); 1126933e4af4c590c63509ffadeb77fcd1d329ac9155Fabio Estevam if (irq <= 0) 1127933e4af4c590c63509ffadeb77fcd1d329ac9155Fabio Estevam return -ENODEV; 1128e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde 1129933e4af4c590c63509ffadeb77fcd1d329ac9155Fabio Estevam base = devm_ioremap_resource(&pdev->dev, mem); 1130933e4af4c590c63509ffadeb77fcd1d329ac9155Fabio Estevam if (IS_ERR(base)) 1131933e4af4c590c63509ffadeb77fcd1d329ac9155Fabio Estevam return PTR_ERR(base); 1132e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde 113330c1e672044d98e5c4cff5fcbdb34b55a2df0c0fHui Wang of_id = of_match_device(flexcan_of_match, &pdev->dev); 113430c1e672044d98e5c4cff5fcbdb34b55a2df0c0fHui Wang if (of_id) { 113530c1e672044d98e5c4cff5fcbdb34b55a2df0c0fHui Wang devtype_data = of_id->data; 1136d0873e6fc06686cf2dfb9adabb6ca65e9967c60fMarc Kleine-Budde } else if (platform_get_device_id(pdev)->driver_data) { 113730c1e672044d98e5c4cff5fcbdb34b55a2df0c0fHui Wang devtype_data = (struct flexcan_devtype_data *) 1138d0873e6fc06686cf2dfb9adabb6ca65e9967c60fMarc Kleine-Budde platform_get_device_id(pdev)->driver_data; 113930c1e672044d98e5c4cff5fcbdb34b55a2df0c0fHui Wang } else { 1140933e4af4c590c63509ffadeb77fcd1d329ac9155Fabio Estevam return -ENODEV; 114130c1e672044d98e5c4cff5fcbdb34b55a2df0c0fHui Wang } 114230c1e672044d98e5c4cff5fcbdb34b55a2df0c0fHui Wang 1143933e4af4c590c63509ffadeb77fcd1d329ac9155Fabio Estevam dev = alloc_candev(sizeof(struct flexcan_priv), 1); 1144933e4af4c590c63509ffadeb77fcd1d329ac9155Fabio Estevam if (!dev) 1145933e4af4c590c63509ffadeb77fcd1d329ac9155Fabio Estevam return -ENOMEM; 1146933e4af4c590c63509ffadeb77fcd1d329ac9155Fabio Estevam 1147e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde dev->netdev_ops = &flexcan_netdev_ops; 1148e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde dev->irq = irq; 11499a12349663061d25b49e6542d005fa7193a2cb44Reuben Dowle dev->flags |= IFF_ECHO; 1150e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde 1151e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde priv = netdev_priv(dev); 115297efe9aef1ae8922666d32f28d712745a86859e9holt@sgi.com priv->can.clock.freq = clock_freq; 1153e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde priv->can.bittiming_const = &flexcan_bittiming_const; 1154e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde priv->can.do_set_mode = flexcan_set_mode; 1155e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde priv->can.do_get_berr_counter = flexcan_get_berr_counter; 1156e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde priv->can.ctrlmode_supported = CAN_CTRLMODE_LOOPBACK | 1157e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde CAN_CTRLMODE_LISTENONLY | CAN_CTRLMODE_3_SAMPLES | 1158e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde CAN_CTRLMODE_BERR_REPORTING; 1159e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde priv->base = base; 1160e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde priv->dev = dev; 11613d42a379b6fa5b46058e3302b1802b29f64865bbSteffen Trumtrar priv->clk_ipg = clk_ipg; 11623d42a379b6fa5b46058e3302b1802b29f64865bbSteffen Trumtrar priv->clk_per = clk_per; 116384ae6643d8bd2d6c9a4e313212bfe68e0abcab3fJingoo Han priv->pdata = dev_get_platdata(&pdev->dev); 116430c1e672044d98e5c4cff5fcbdb34b55a2df0c0fHui Wang priv->devtype_data = devtype_data; 1165e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde 1166b7c4114b07bbacfe0aee1d04ad1ade9e42309620Fabio Estevam priv->reg_xceiver = devm_regulator_get(&pdev->dev, "xceiver"); 1167b7c4114b07bbacfe0aee1d04ad1ade9e42309620Fabio Estevam if (IS_ERR(priv->reg_xceiver)) 1168b7c4114b07bbacfe0aee1d04ad1ade9e42309620Fabio Estevam priv->reg_xceiver = NULL; 1169b7c4114b07bbacfe0aee1d04ad1ade9e42309620Fabio Estevam 1170e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde netif_napi_add(dev, &priv->napi, flexcan_poll, FLEXCAN_NAPI_WEIGHT); 1171e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde 1172d75ea942b360690a380da8012a51eaf6a6ebb1b1Libo Chen platform_set_drvdata(pdev, dev); 1173e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde SET_NETDEV_DEV(dev, &pdev->dev); 1174e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde 1175e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde err = register_flexcandev(dev); 1176e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde if (err) { 1177e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde dev_err(&pdev->dev, "registering netdev failed\n"); 1178e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde goto failed_register; 1179e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde } 1180e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde 1181adccadb92f0571fd0f9b2ac8011057a7de9e3e63Fabio Baltieri devm_can_led_init(dev); 1182adccadb92f0571fd0f9b2ac8011057a7de9e3e63Fabio Baltieri 1183e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde dev_info(&pdev->dev, "device registered (reg_base=%p, irq=%d)\n", 1184e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde priv->base, dev->irq); 1185e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde 1186e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde return 0; 1187e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde 1188e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde failed_register: 1189e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde free_candev(dev); 1190e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde return err; 1191e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde} 1192e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde 11933c8ac0f2ad53a96ac58efe7c98fac2986d081dfcBill Pembertonstatic int flexcan_remove(struct platform_device *pdev) 1194e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde{ 1195e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde struct net_device *dev = platform_get_drvdata(pdev); 1196d96e43e8fce28cf97df576a07af9d65657a41a6fMarc Kleine-Budde struct flexcan_priv *priv = netdev_priv(dev); 1197e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde 1198e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde unregister_flexcandev(dev); 1199d96e43e8fce28cf97df576a07af9d65657a41a6fMarc Kleine-Budde netif_napi_del(&priv->napi); 12009a27586d3d5c3157260b055d057c6f4f6654c72cMarc Kleine-Budde free_candev(dev); 12019a27586d3d5c3157260b055d057c6f4f6654c72cMarc Kleine-Budde 1202e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde return 0; 1203e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde} 1204e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde 120508c6d35154069becb01243176fb72b3bc60ff3cbMarc Kleine-Buddestatic int __maybe_unused flexcan_suspend(struct device *device) 12068b5e218d8caa7592d26e68157bd71f50426bb7aeEric Bénard{ 1207588e7a8e123da07b6ffe87f156e25afc1c3d7cceFabio Estevam struct net_device *dev = dev_get_drvdata(device); 12088b5e218d8caa7592d26e68157bd71f50426bb7aeEric Bénard struct flexcan_priv *priv = netdev_priv(dev); 12099b00b300e7bce032c467c36ca47fe2a776887fc2Marc Kleine-Budde int err; 12108b5e218d8caa7592d26e68157bd71f50426bb7aeEric Bénard 12119b00b300e7bce032c467c36ca47fe2a776887fc2Marc Kleine-Budde err = flexcan_chip_disable(priv); 12129b00b300e7bce032c467c36ca47fe2a776887fc2Marc Kleine-Budde if (err) 12139b00b300e7bce032c467c36ca47fe2a776887fc2Marc Kleine-Budde return err; 12148b5e218d8caa7592d26e68157bd71f50426bb7aeEric Bénard 12158b5e218d8caa7592d26e68157bd71f50426bb7aeEric Bénard if (netif_running(dev)) { 12168b5e218d8caa7592d26e68157bd71f50426bb7aeEric Bénard netif_stop_queue(dev); 12178b5e218d8caa7592d26e68157bd71f50426bb7aeEric Bénard netif_device_detach(dev); 12188b5e218d8caa7592d26e68157bd71f50426bb7aeEric Bénard } 12198b5e218d8caa7592d26e68157bd71f50426bb7aeEric Bénard priv->can.state = CAN_STATE_SLEEPING; 12208b5e218d8caa7592d26e68157bd71f50426bb7aeEric Bénard 12218b5e218d8caa7592d26e68157bd71f50426bb7aeEric Bénard return 0; 12228b5e218d8caa7592d26e68157bd71f50426bb7aeEric Bénard} 12238b5e218d8caa7592d26e68157bd71f50426bb7aeEric Bénard 122408c6d35154069becb01243176fb72b3bc60ff3cbMarc Kleine-Buddestatic int __maybe_unused flexcan_resume(struct device *device) 12258b5e218d8caa7592d26e68157bd71f50426bb7aeEric Bénard{ 1226588e7a8e123da07b6ffe87f156e25afc1c3d7cceFabio Estevam struct net_device *dev = dev_get_drvdata(device); 12278b5e218d8caa7592d26e68157bd71f50426bb7aeEric Bénard struct flexcan_priv *priv = netdev_priv(dev); 12288b5e218d8caa7592d26e68157bd71f50426bb7aeEric Bénard 12298b5e218d8caa7592d26e68157bd71f50426bb7aeEric Bénard priv->can.state = CAN_STATE_ERROR_ACTIVE; 12308b5e218d8caa7592d26e68157bd71f50426bb7aeEric Bénard if (netif_running(dev)) { 12318b5e218d8caa7592d26e68157bd71f50426bb7aeEric Bénard netif_device_attach(dev); 12328b5e218d8caa7592d26e68157bd71f50426bb7aeEric Bénard netif_start_queue(dev); 12338b5e218d8caa7592d26e68157bd71f50426bb7aeEric Bénard } 12349b00b300e7bce032c467c36ca47fe2a776887fc2Marc Kleine-Budde return flexcan_chip_enable(priv); 12358b5e218d8caa7592d26e68157bd71f50426bb7aeEric Bénard} 1236588e7a8e123da07b6ffe87f156e25afc1c3d7cceFabio Estevam 1237588e7a8e123da07b6ffe87f156e25afc1c3d7cceFabio Estevamstatic SIMPLE_DEV_PM_OPS(flexcan_pm_ops, flexcan_suspend, flexcan_resume); 12388b5e218d8caa7592d26e68157bd71f50426bb7aeEric Bénard 1239e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Buddestatic struct platform_driver flexcan_driver = { 1240c8aef4cb788b760331e6df06a5d93389824882b4holt@sgi.com .driver = { 1241c8aef4cb788b760331e6df06a5d93389824882b4holt@sgi.com .name = DRV_NAME, 1242c8aef4cb788b760331e6df06a5d93389824882b4holt@sgi.com .owner = THIS_MODULE, 1243588e7a8e123da07b6ffe87f156e25afc1c3d7cceFabio Estevam .pm = &flexcan_pm_ops, 1244c8aef4cb788b760331e6df06a5d93389824882b4holt@sgi.com .of_match_table = flexcan_of_match, 1245c8aef4cb788b760331e6df06a5d93389824882b4holt@sgi.com }, 1246e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde .probe = flexcan_probe, 12473c8ac0f2ad53a96ac58efe7c98fac2986d081dfcBill Pemberton .remove = flexcan_remove, 124830c1e672044d98e5c4cff5fcbdb34b55a2df0c0fHui Wang .id_table = flexcan_id_table, 1249e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde}; 1250e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde 1251871d33725545ca2e402b4526f38f89d041ba930fAxel Linmodule_platform_driver(flexcan_driver); 1252e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde 1253e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-BuddeMODULE_AUTHOR("Sascha Hauer <kernel@pengutronix.de>, " 1254e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-Budde "Marc Kleine-Budde <kernel@pengutronix.de>"); 1255e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-BuddeMODULE_LICENSE("GPL v2"); 1256e955cead031177b083fbf18d04a03c06e330a439Marc Kleine-BuddeMODULE_DESCRIPTION("CAN port driver for flexcan based chip"); 1257