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197 lines
6.0 KiB
197 lines
6.0 KiB
/* SPDX-License-Identifier: GPL-2.0-only */ |
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/* |
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* Core driver for the CC770 and AN82527 CAN controllers |
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* |
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* Copyright (C) 2009, 2011 Wolfgang Grandegger <[email protected]> |
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*/ |
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#ifndef CC770_DEV_H |
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#define CC770_DEV_H |
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#include <linux/can/dev.h> |
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struct cc770_msgobj { |
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u8 ctrl0; |
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u8 ctrl1; |
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u8 id[4]; |
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u8 config; |
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u8 data[8]; |
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u8 dontuse; /* padding */ |
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} __packed; |
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struct cc770_regs { |
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union { |
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struct cc770_msgobj msgobj[16]; /* Message object 1..15 */ |
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struct { |
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u8 control; /* Control Register */ |
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u8 status; /* Status Register */ |
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u8 cpu_interface; /* CPU Interface Register */ |
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u8 dontuse1; |
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u8 high_speed_read[2]; /* High Speed Read */ |
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u8 global_mask_std[2]; /* Standard Global Mask */ |
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u8 global_mask_ext[4]; /* Extended Global Mask */ |
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u8 msg15_mask[4]; /* Message 15 Mask */ |
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u8 dontuse2[15]; |
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u8 clkout; /* Clock Out Register */ |
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u8 dontuse3[15]; |
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u8 bus_config; /* Bus Configuration Register */ |
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u8 dontuse4[15]; |
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u8 bit_timing_0; /* Bit Timing Register byte 0 */ |
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u8 dontuse5[15]; |
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u8 bit_timing_1; /* Bit Timing Register byte 1 */ |
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u8 dontuse6[15]; |
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u8 interrupt; /* Interrupt Register */ |
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u8 dontuse7[15]; |
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u8 rx_error_counter; /* Receive Error Counter */ |
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u8 dontuse8[15]; |
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u8 tx_error_counter; /* Transmit Error Counter */ |
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u8 dontuse9[31]; |
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u8 p1_conf; |
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u8 dontuse10[15]; |
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u8 p2_conf; |
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u8 dontuse11[15]; |
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u8 p1_in; |
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u8 dontuse12[15]; |
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u8 p2_in; |
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u8 dontuse13[15]; |
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u8 p1_out; |
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u8 dontuse14[15]; |
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u8 p2_out; |
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u8 dontuse15[15]; |
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u8 serial_reset_addr; |
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}; |
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}; |
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} __packed; |
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/* Control Register (0x00) */ |
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#define CTRL_INI 0x01 /* Initialization */ |
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#define CTRL_IE 0x02 /* Interrupt Enable */ |
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#define CTRL_SIE 0x04 /* Status Interrupt Enable */ |
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#define CTRL_EIE 0x08 /* Error Interrupt Enable */ |
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#define CTRL_EAF 0x20 /* Enable additional functions */ |
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#define CTRL_CCE 0x40 /* Change Configuration Enable */ |
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/* Status Register (0x01) */ |
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#define STAT_LEC_STUFF 0x01 /* Stuff error */ |
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#define STAT_LEC_FORM 0x02 /* Form error */ |
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#define STAT_LEC_ACK 0x03 /* Acknowledgement error */ |
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#define STAT_LEC_BIT1 0x04 /* Bit1 error */ |
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#define STAT_LEC_BIT0 0x05 /* Bit0 error */ |
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#define STAT_LEC_CRC 0x06 /* CRC error */ |
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#define STAT_LEC_MASK 0x07 /* Last Error Code mask */ |
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#define STAT_TXOK 0x08 /* Transmit Message Successfully */ |
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#define STAT_RXOK 0x10 /* Receive Message Successfully */ |
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#define STAT_WAKE 0x20 /* Wake Up Status */ |
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#define STAT_WARN 0x40 /* Warning Status */ |
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#define STAT_BOFF 0x80 /* Bus Off Status */ |
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/* |
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* CPU Interface Register (0x02) |
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* Clock Out Register (0x1f) |
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* Bus Configuration Register (0x2f) |
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* |
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* see include/linux/can/platform/cc770.h |
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*/ |
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/* Message Control Register 0 (Base Address + 0x0) */ |
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#define INTPND_RES 0x01 /* No Interrupt pending */ |
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#define INTPND_SET 0x02 /* Interrupt pending */ |
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#define INTPND_UNC 0x03 |
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#define RXIE_RES 0x04 /* Receive Interrupt Disable */ |
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#define RXIE_SET 0x08 /* Receive Interrupt Enable */ |
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#define RXIE_UNC 0x0c |
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#define TXIE_RES 0x10 /* Transmit Interrupt Disable */ |
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#define TXIE_SET 0x20 /* Transmit Interrupt Enable */ |
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#define TXIE_UNC 0x30 |
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#define MSGVAL_RES 0x40 /* Message Invalid */ |
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#define MSGVAL_SET 0x80 /* Message Valid */ |
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#define MSGVAL_UNC 0xc0 |
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/* Message Control Register 1 (Base Address + 0x01) */ |
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#define NEWDAT_RES 0x01 /* No New Data */ |
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#define NEWDAT_SET 0x02 /* New Data */ |
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#define NEWDAT_UNC 0x03 |
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#define MSGLST_RES 0x04 /* No Message Lost */ |
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#define MSGLST_SET 0x08 /* Message Lost */ |
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#define MSGLST_UNC 0x0c |
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#define CPUUPD_RES 0x04 /* No CPU Updating */ |
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#define CPUUPD_SET 0x08 /* CPU Updating */ |
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#define CPUUPD_UNC 0x0c |
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#define TXRQST_RES 0x10 /* No Transmission Request */ |
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#define TXRQST_SET 0x20 /* Transmission Request */ |
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#define TXRQST_UNC 0x30 |
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#define RMTPND_RES 0x40 /* No Remote Request Pending */ |
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#define RMTPND_SET 0x80 /* Remote Request Pending */ |
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#define RMTPND_UNC 0xc0 |
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/* Message Configuration Register (Base Address + 0x06) */ |
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#define MSGCFG_XTD 0x04 /* Extended Identifier */ |
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#define MSGCFG_DIR 0x08 /* Direction is Transmit */ |
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#define MSGOBJ_FIRST 1 |
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#define MSGOBJ_LAST 15 |
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#define CC770_IO_SIZE 0x100 |
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#define CC770_MAX_IRQ 20 /* max. number of interrupts handled in ISR */ |
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#define CC770_MAX_MSG 4 /* max. number of messages handled in ISR */ |
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#define CC770_ECHO_SKB_MAX 1 |
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#define cc770_read_reg(priv, member) \ |
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priv->read_reg(priv, offsetof(struct cc770_regs, member)) |
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#define cc770_write_reg(priv, member, value) \ |
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priv->write_reg(priv, offsetof(struct cc770_regs, member), value) |
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/* |
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* Message objects and flags used by this driver |
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*/ |
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#define CC770_OBJ_FLAG_RX 0x01 |
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#define CC770_OBJ_FLAG_RTR 0x02 |
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#define CC770_OBJ_FLAG_EFF 0x04 |
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enum { |
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CC770_OBJ_RX0 = 0, /* for receiving normal messages */ |
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CC770_OBJ_RX1, /* for receiving normal messages */ |
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CC770_OBJ_RX_RTR0, /* for receiving remote transmission requests */ |
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CC770_OBJ_RX_RTR1, /* for receiving remote transmission requests */ |
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CC770_OBJ_TX, /* for sending messages */ |
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CC770_OBJ_MAX |
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}; |
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#define obj2msgobj(o) (MSGOBJ_LAST - (o)) /* message object 11..15 */ |
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/* |
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* CC770 private data structure |
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*/ |
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struct cc770_priv { |
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struct can_priv can; /* must be the first member */ |
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struct sk_buff *echo_skb; |
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/* the lower-layer is responsible for appropriate locking */ |
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u8 (*read_reg)(const struct cc770_priv *priv, int reg); |
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void (*write_reg)(const struct cc770_priv *priv, int reg, u8 val); |
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void (*pre_irq)(const struct cc770_priv *priv); |
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void (*post_irq)(const struct cc770_priv *priv); |
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void *priv; /* for board-specific data */ |
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struct net_device *dev; |
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void __iomem *reg_base; /* ioremap'ed address to registers */ |
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unsigned long irq_flags; /* for request_irq() */ |
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unsigned char obj_flags[CC770_OBJ_MAX]; |
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u8 control_normal_mode; /* Control register for normal mode */ |
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u8 cpu_interface; /* CPU interface register */ |
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u8 clkout; /* Clock out register */ |
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u8 bus_config; /* Bus configuration register */ |
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struct sk_buff *tx_skb; |
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}; |
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struct net_device *alloc_cc770dev(int sizeof_priv); |
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void free_cc770dev(struct net_device *dev); |
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int register_cc770dev(struct net_device *dev); |
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void unregister_cc770dev(struct net_device *dev); |
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#endif /* CC770_DEV_H */
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