/* * CAN bus driver for Bosch C_CAN controller * * Copyright (C) 2010 ST Microelectronics * Bhupesh Sharma * * Borrowed heavily from the C_CAN driver originally written by: * Copyright (C) 2007 * - Sascha Hauer, Marc Kleine-Budde, Pengutronix * - Simon Kallweit, intefo AG * * Bosch C_CAN controller is compliant to CAN protocol version 2.0 part A and B. * Bosch C_CAN user manual can be obtained from: * http://www.semiconductors.bosch.de/media/en/pdf/ipmodules_1/c_can/ * users_manual_c_can.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. */ #ifndef C_CAN_H #define C_CAN_H enum reg { C_CAN_CTRL_REG = 0, C_CAN_STS_REG, C_CAN_ERR_CNT_REG, C_CAN_BTR_REG, C_CAN_INT_REG, C_CAN_TEST_REG, C_CAN_BRPEXT_REG, C_CAN_IF1_COMREQ_REG, C_CAN_IF1_COMMSK_REG, C_CAN_IF1_MASK1_REG, C_CAN_IF1_MASK2_REG, C_CAN_IF1_ARB1_REG, C_CAN_IF1_ARB2_REG, C_CAN_IF1_MSGCTRL_REG, C_CAN_IF1_DATA1_REG, C_CAN_IF1_DATA2_REG, C_CAN_IF1_DATA3_REG, C_CAN_IF1_DATA4_REG, C_CAN_IF2_COMREQ_REG, C_CAN_IF2_COMMSK_REG, C_CAN_IF2_MASK1_REG, C_CAN_IF2_MASK2_REG, C_CAN_IF2_ARB1_REG, C_CAN_IF2_ARB2_REG, C_CAN_IF2_MSGCTRL_REG, C_CAN_IF2_DATA1_REG, C_CAN_IF2_DATA2_REG, C_CAN_IF2_DATA3_REG, C_CAN_IF2_DATA4_REG, C_CAN_TXRQST1_REG, C_CAN_TXRQST2_REG, C_CAN_NEWDAT1_REG, C_CAN_NEWDAT2_REG, C_CAN_INTPND1_REG, C_CAN_INTPND2_REG, C_CAN_MSGVAL1_REG, C_CAN_MSGVAL2_REG, }; static const u16 reg_map_c_can[] = { [C_CAN_CTRL_REG] = 0x00, [C_CAN_STS_REG] = 0x02, [C_CAN_ERR_CNT_REG] = 0x04, [C_CAN_BTR_REG] = 0x06, [C_CAN_INT_REG] = 0x08, [C_CAN_TEST_REG] = 0x0A, [C_CAN_BRPEXT_REG] = 0x0C, [C_CAN_IF1_COMREQ_REG] = 0x10, [C_CAN_IF1_COMMSK_REG] = 0x12, [C_CAN_IF1_MASK1_REG] = 0x14, [C_CAN_IF1_MASK2_REG] = 0x16, [C_CAN_IF1_ARB1_REG] = 0x18, [C_CAN_IF1_ARB2_REG] = 0x1A, [C_CAN_IF1_MSGCTRL_REG] = 0x1C, [C_CAN_IF1_DATA1_REG] = 0x1E, [C_CAN_IF1_DATA2_REG] = 0x20, [C_CAN_IF1_DATA3_REG] = 0x22, [C_CAN_IF1_DATA4_REG] = 0x24, [C_CAN_IF2_COMREQ_REG] = 0x40, [C_CAN_IF2_COMMSK_REG] = 0x42, [C_CAN_IF2_MASK1_REG] = 0x44, [C_CAN_IF2_MASK2_REG] = 0x46, [C_CAN_IF2_ARB1_REG] = 0x48, [C_CAN_IF2_ARB2_REG] = 0x4A, [C_CAN_IF2_MSGCTRL_REG] = 0x4C, [C_CAN_IF2_DATA1_REG] = 0x4E, [C_CAN_IF2_DATA2_REG] = 0x50, [C_CAN_IF2_DATA3_REG] = 0x52, [C_CAN_IF2_DATA4_REG] = 0x54, [C_CAN_TXRQST1_REG] = 0x80, [C_CAN_TXRQST2_REG] = 0x82, [C_CAN_NEWDAT1_REG] = 0x90, [C_CAN_NEWDAT2_REG] = 0x92, [C_CAN_INTPND1_REG] = 0xA0, [C_CAN_INTPND2_REG] = 0xA2, [C_CAN_MSGVAL1_REG] = 0xB0, [C_CAN_MSGVAL2_REG] = 0xB2, }; static const u16 reg_map_d_can[] = { [C_CAN_CTRL_REG] = 0x00, [C_CAN_STS_REG] = 0x04, [C_CAN_ERR_CNT_REG] = 0x08, [C_CAN_BTR_REG] = 0x0C, [C_CAN_BRPEXT_REG] = 0x0E, [C_CAN_INT_REG] = 0x10, [C_CAN_TEST_REG] = 0x14, [C_CAN_TXRQST1_REG] = 0x88, [C_CAN_TXRQST2_REG] = 0x8A, [C_CAN_NEWDAT1_REG] = 0x9C, [C_CAN_NEWDAT2_REG] = 0x9E, [C_CAN_INTPND1_REG] = 0xB0, [C_CAN_INTPND2_REG] = 0xB2, [C_CAN_MSGVAL1_REG] = 0xC4, [C_CAN_MSGVAL2_REG] = 0xC6, [C_CAN_IF1_COMREQ_REG] = 0x100, [C_CAN_IF1_COMMSK_REG] = 0x102, [C_CAN_IF1_MASK1_REG] = 0x104, [C_CAN_IF1_MASK2_REG] = 0x106, [C_CAN_IF1_ARB1_REG] = 0x108, [C_CAN_IF1_ARB2_REG] = 0x10A, [C_CAN_IF1_MSGCTRL_REG] = 0x10C, [C_CAN_IF1_DATA1_REG] = 0x110, [C_CAN_IF1_DATA2_REG] = 0x112, [C_CAN_IF1_DATA3_REG] = 0x114, [C_CAN_IF1_DATA4_REG] = 0x116, [C_CAN_IF2_COMREQ_REG] = 0x120, [C_CAN_IF2_COMMSK_REG] = 0x122, [C_CAN_IF2_MASK1_REG] = 0x124, [C_CAN_IF2_MASK2_REG] = 0x126, [C_CAN_IF2_ARB1_REG] = 0x128, [C_CAN_IF2_ARB2_REG] = 0x12A, [C_CAN_IF2_MSGCTRL_REG] = 0x12C, [C_CAN_IF2_DATA1_REG] = 0x130, [C_CAN_IF2_DATA2_REG] = 0x132, [C_CAN_IF2_DATA3_REG] = 0x134, [C_CAN_IF2_DATA4_REG] = 0x136, }; enum c_can_dev_id { BOSCH_C_CAN_PLATFORM, BOSCH_C_CAN, BOSCH_D_CAN, }; /* c_can private data structure */ struct c_can_priv { struct can_priv can; /* must be the first member */ struct napi_struct napi; struct net_device *dev; int tx_object; int current_status; int last_status; u16 (*read_reg) (struct c_can_priv *priv, enum reg index); void (*write_reg) (struct c_can_priv *priv, enum reg index, u16 val); void __iomem *base; const u16 *regs; unsigned long irq_flags; /* for request_irq() */ unsigned int tx_next; unsigned int tx_echo; void *priv; /* for board-specific data */ u16 irqstatus; }; struct net_device *alloc_c_can_dev(void); void free_c_can_dev(struct net_device *dev); int register_c_can_dev(struct net_device *dev); void unregister_c_can_dev(struct net_device *dev); #endif /* C_CAN_H */