/*
* CAN bus driver for Bosch M_CAN controller
*
* Copyright (C) 2014 Freescale Semiconductor, Inc.
* Dong Aisheng <b29396@freescale.com>
*
* Bosch M_CAN user manual can be obtained from:
* http://www.bosch-semiconductors.de/media/pdf_1/ipmodules_1/m_can/
* mcan_users_manual_v302.pdf
*
* This file is licensed under the terms of the GNU General Public
* License version 2. This program is licensed "as is" without any
* warranty of any kind, whether express or implied.
*/
#include <linux/clk.h>
#include <linux/delay.h>
#include <linux/interrupt.h>
#include <linux/io.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/netdevice.h>
#include <linux/of.h>
#include <linux/of_device.h>
#include <linux/platform_device.h>
#include <linux/can/dev.h>
/* napi related */
#define M_CAN_NAPI_WEIGHT 64
/* message ram configuration data length */
#define MRAM_CFG_LEN 8
/* registers definition */
enum m_can_reg {
M_CAN_CREL = 0x0,
M_CAN_ENDN = 0x4,
M_CAN_CUST = 0x8,
M_CAN_FBTP = 0xc,
M_CAN_TEST = 0x10,
M_CAN_RWD = 0x14,
M_CAN_CCCR = 0x18,
M_CAN_BTP = 0x1c,
M_CAN_TSCC = 0x20,
M_CAN_TSCV = 0x24,
M_CAN_TOCC = 0x28,
M_CAN_TOCV = 0x2c,
M_CAN_ECR = 0x40,
M_CAN_PSR = 0x44,
M_CAN_IR = 0x50,
M_CAN_IE = 0x54,
M_CAN_ILS = 0x58,
M_CAN_ILE = 0x5c,
M_CAN_GFC = 0x80,
M_CAN_SIDFC = 0x84,
M_CAN_XIDFC = 0x88,
M_CAN_XIDAM = 0x90,
M_CAN_HPMS = 0x94,
M_CAN_NDAT1 = 0x98,
M_CAN_NDAT2 = 0x9c,
M_CAN_RXF0C = 0xa0,
M_CAN_RXF0S = 0xa4,
M_CAN_RXF0A = 0xa8,
M_CAN_RXBC = 0xac,
M_CAN_RXF1C = 0xb0,
M_CAN_RXF1S = 0xb4,
M_CAN_RXF1A = 0xb8,
M_CAN_RXESC = 0xbc,
M_CAN_TXBC = 0xc0,
M_CAN_TXFQS = 0xc4,
M_CAN_TXESC = 0xc8,
M_CAN_TXBRP = 0xcc,
M_CAN_TXBAR = 0xd0,
M_CAN_TXBCR = 0xd4,
M_CAN_TXBTO = 0xd8,
M_CAN_TXBCF = 0xdc,
M_CAN_TXBTIE = 0xe0,
M_CAN_TXBCIE = 0xe4,
M_CAN_TXEFC = 0xf0,
M_CAN_TXEFS = 0xf4,
M_CAN_TXEFA = 0xf8,
};
/* m_can lec values */
enum m_can_lec_type