projects / deliverable / linux.git / blame
| Commit | Line | Data |
|---|---|---|
| 2a367c3a WG |
1 | /* |
| 2 | * Core driver for the CC770 and AN82527 CAN controllers | |
| 3 | * | |
| 4 | * Copyright (C) 2009, 2011 Wolfgang Grandegger <wg@grandegger.com> | |
| 5 | * | |
| 6 | * This program is free software; you can redistribute it and/or modify | |
| 7 | * it under the terms of the version 2 of the GNU General Public License | |
| 8 | * as published by the Free Software Foundation | |
| 9 | * | |
| 10 | * This program is distributed in the hope that it will be useful, | |
| 11 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 12 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
| 13 | * GNU General Public License for more details. | |
| 14 | */ | |
| 15 | ||
| 16 | #ifndef CC770_DEV_H | |
| 17 | #define CC770_DEV_H | |
| 18 | ||
| 19 | #include <linux/can/dev.h> | |
| 20 | ||
| 21 | struct cc770_msgobj { | |
| 22 | u8 ctrl0; | |
| 23 | u8 ctrl1; | |
| 24 | u8 id[4]; | |
| 25 | u8 config; | |
| 26 | u8 data[8]; | |
| 27 | u8 dontuse; /* padding */ | |
| 28 | } __packed; | |
| 29 | ||
| 30 | struct cc770_regs { | |
| 31 | union { | |
| 32 | struct cc770_msgobj msgobj[16]; /* Message object 1..15 */ | |
| 33 | struct { | |
| 34 | u8 control; /* Control Register */ | |
| 35 | u8 status; /* Status Register */ | |
| 36 | u8 cpu_interface; /* CPU Interface Register */ | |
| 37 | u8 dontuse1; | |
| 38 | u8 high_speed_read[2]; /* High Speed Read */ | |
| 39 | u8 global_mask_std[2]; /* Standard Global Mask */ | |
| 40 | u8 global_mask_ext[4]; /* Extended Global Mask */ | |
| 41 | u8 msg15_mask[4]; /* Message 15 Mask */ | |
| 42 | u8 dontuse2[15]; | |
| 43 | u8 clkout; /* Clock Out Register */ | |
| 44 | u8 dontuse3[15]; | |
| 45 | u8 bus_config; /* Bus Configuration Register */ | |
| 46 | u8 dontuse4[15]; | |
| 47 | u8 bit_timing_0; /* Bit Timing Register byte 0 */ | |
| 48 | u8 dontuse5[15]; | |
| 49 | u8 bit_timing_1; /* Bit Timing Register byte 1 */ | |
| 50 | u8 dontuse6[15]; | |
| 51 | u8 interrupt; /* Interrupt Register */ | |
| 52 | u8 dontuse7[15]; | |
| 53 | u8 rx_error_counter; /* Receive Error Counter */ | |
| 54 | u8 dontuse8[15]; | |
| 55 | u8 tx_error_counter; /* Transmit Error Counter */ | |
| 56 | u8 dontuse9[31]; | |
| 57 | u8 p1_conf; | |
| 58 | u8 dontuse10[15]; | |
| 59 | u8 p2_conf; | |
| 60 | u8 dontuse11[15]; | |
| 61 | u8 p1_in; | |
| 62 | u8 dontuse12[15]; | |
| 63 | u8 p2_in; | |
| 64 | u8 dontuse13[15]; | |
| 65 | u8 p1_out; | |
| 66 | u8 dontuse14[15]; | |
| 67 | u8 p2_out; | |
| 68 | u8 dontuse15[15]; | |
| 69 | u8 serial_reset_addr; | |
| 70 | }; | |
| 71 | }; | |
| 72 | } __packed; | |
| 73 | ||
| 74 | /* Control Register (0x00) */ | |
| 75 | #define CTRL_INI 0x01 /* Initialization */ | |
| 76 | #define CTRL_IE 0x02 /* Interrupt Enable */ | |
| 77 | #define CTRL_SIE 0x04 /* Status Interrupt Enable */ | |
| 78 | #define CTRL_EIE 0x08 /* Error Interrupt Enable */ | |
| 79 | #define CTRL_EAF 0x20 /* Enable additional functions */ | |
| 80 | #define CTRL_CCE 0x40 /* Change Configuration Enable */ | |
| 81 | ||
| 82 | /* Status Register (0x01) */ | |
| 83 | #define STAT_LEC_STUFF 0x01 /* Stuff error */ | |
| 84 | #define STAT_LEC_FORM 0x02 /* Form error */ | |
| 85 | #define STAT_LEC_ACK 0x03 /* Acknowledgement error */ | |
| 86 | #define STAT_LEC_BIT1 0x04 /* Bit1 error */ | |
| 87 | #define STAT_LEC_BIT0 0x05 /* Bit0 error */ | |
| 88 | #define STAT_LEC_CRC 0x06 /* CRC error */ | |
| 89 | #define STAT_LEC_MASK 0x07 /* Last Error Code mask */ | |
| 90 | #define STAT_TXOK 0x08 /* Transmit Message Successfully */ | |
| 91 | #define STAT_RXOK 0x10 /* Receive Message Successfully */ | |
| 92 | #define STAT_WAKE 0x20 /* Wake Up Status */ | |
| 93 | #define STAT_WARN 0x40 /* Warning Status */ | |
| 94 | #define STAT_BOFF 0x80 /* Bus Off Status */ | |
| 95 | ||
| 96 | /* | |
| 97 | * CPU Interface Register (0x02) | |
| 98 | * Clock Out Register (0x1f) | |
| 99 | * Bus Configuration Register (0x2f) | |
| 100 | * | |
| 101 | * see include/linux/can/platform/cc770.h | |
| 102 | */ | |
| 103 | ||
| 104 | /* Message Control Register 0 (Base Address + 0x0) */ | |
| 105 | #define INTPND_RES 0x01 /* No Interrupt pending */ | |
| 106 | #define INTPND_SET 0x02 /* Interrupt pending */ | |
| 107 | #define INTPND_UNC 0x03 | |
| 108 | #define RXIE_RES 0x04 /* Receive Interrupt Disable */ | |
| 109 | #define RXIE_SET 0x08 /* Receive Interrupt Enable */ | |
| 110 | #define RXIE_UNC 0x0c | |
| 111 | #define TXIE_RES 0x10 /* Transmit Interrupt Disable */ | |
| 112 | #define TXIE_SET 0x20 /* Transmit Interrupt Enable */ | |
| 113 | #define TXIE_UNC 0x30 | |
| 114 | #define MSGVAL_RES 0x40 /* Message Invalid */ | |
| 115 | #define MSGVAL_SET 0x80 /* Message Valid */ | |
| 116 | #define MSGVAL_UNC 0xc0 | |
| 117 | ||
| 118 | /* Message Control Register 1 (Base Address + 0x01) */ | |
| 119 | #define NEWDAT_RES 0x01 /* No New Data */ | |
| 120 | #define NEWDAT_SET 0x02 /* New Data */ | |
| 121 | #define NEWDAT_UNC 0x03 | |
| 122 | #define MSGLST_RES 0x04 /* No Message Lost */ | |
| 123 | #define MSGLST_SET 0x08 /* Message Lost */ | |
| 124 | #define MSGLST_UNC 0x0c | |
| 125 | #define CPUUPD_RES 0x04 /* No CPU Updating */ | |
| 126 | #define CPUUPD_SET 0x08 /* CPU Updating */ | |
| 127 | #define CPUUPD_UNC 0x0c | |
| 128 | #define TXRQST_RES 0x10 /* No Transmission Request */ | |
| 129 | #define TXRQST_SET 0x20 /* Transmission Request */ | |
| 130 | #define TXRQST_UNC 0x30 | |
| 131 | #define RMTPND_RES 0x40 /* No Remote Request Pending */ | |
| 132 | #define RMTPND_SET 0x80 /* Remote Request Pending */ | |
| 133 | #define RMTPND_UNC 0xc0 | |
| 134 | ||
| 135 | /* Message Configuration Register (Base Address + 0x06) */ | |
| 136 | #define MSGCFG_XTD 0x04 /* Extended Identifier */ | |
| 137 | #define MSGCFG_DIR 0x08 /* Direction is Transmit */ | |
| 138 | ||
| 139 | #define MSGOBJ_FIRST 1 | |
| 140 | #define MSGOBJ_LAST 15 | |
| 141 | ||
| 142 | #define CC770_IO_SIZE 0x100 | |
| 143 | #define CC770_MAX_IRQ 20 /* max. number of interrupts handled in ISR */ | |
| 144 | #define CC770_MAX_MSG 4 /* max. number of messages handled in ISR */ | |
| 145 | ||
| 146 | #define CC770_ECHO_SKB_MAX 1 | |
| 147 | ||
| 148 | #define cc770_read_reg(priv, member) \ | |
| 149 | priv->read_reg(priv, offsetof(struct cc770_regs, member)) | |
| 150 | ||
| 151 | #define cc770_write_reg(priv, member, value) \ | |
| 152 | priv->write_reg(priv, offsetof(struct cc770_regs, member), value) | |
| 153 | ||
| 154 | /* | |
| 155 | * Message objects and flags used by this driver | |
| 156 | */ | |
| 157 | #define CC770_OBJ_FLAG_RX 0x01 | |
| 158 | #define CC770_OBJ_FLAG_RTR 0x02 | |
| 159 | #define CC770_OBJ_FLAG_EFF 0x04 | |
| 160 | ||
| 161 | enum { | |
| 162 | CC770_OBJ_RX0 = 0, /* for receiving normal messages */ | |
| 163 | CC770_OBJ_RX1, /* for receiving normal messages */ | |
| 164 | CC770_OBJ_RX_RTR0, /* for receiving remote transmission requests */ | |
| 165 | CC770_OBJ_RX_RTR1, /* for receiving remote transmission requests */ | |
| 166 | CC770_OBJ_TX, /* for sending messages */ | |
| 167 | CC770_OBJ_MAX | |
| 168 | }; | |
| 169 | ||
| 170 | #define obj2msgobj(o) (MSGOBJ_LAST - (o)) /* message object 11..15 */ | |
| 171 | ||
| 172 | /* | |
| 173 | * CC770 private data structure | |
| 174 | */ | |
| 175 | struct cc770_priv { | |
| 176 | struct can_priv can; /* must be the first member */ | |
| 177 | struct sk_buff *echo_skb; | |
| 178 | ||
| 179 | /* the lower-layer is responsible for appropriate locking */ | |
| 180 | u8 (*read_reg)(const struct cc770_priv *priv, int reg); | |
| 181 | void (*write_reg)(const struct cc770_priv *priv, int reg, u8 val); | |
| 182 | void (*pre_irq)(const struct cc770_priv *priv); | |
| 183 | void (*post_irq)(const struct cc770_priv *priv); | |
| 184 | ||
| 185 | void *priv; /* for board-specific data */ | |
| 186 | struct net_device *dev; | |
| 187 | ||
| 188 | void __iomem *reg_base; /* ioremap'ed address to registers */ | |
| 189 | unsigned long irq_flags; /* for request_irq() */ | |
| 190 | ||
| 191 | unsigned char obj_flags[CC770_OBJ_MAX]; | |
| 192 | u8 control_normal_mode; /* Control register for normal mode */ | |
| 193 | u8 cpu_interface; /* CPU interface register */ | |
| 194 | u8 clkout; /* Clock out register */ | |
| 195 | u8 bus_config; /* Bus conffiguration register */ | |
| 196 | }; | |
| 197 | ||
| 198 | struct net_device *alloc_cc770dev(int sizeof_priv); | |
| 199 | void free_cc770dev(struct net_device *dev); | |
| 200 | int register_cc770dev(struct net_device *dev); | |
| 201 | void unregister_cc770dev(struct net_device *dev); | |
| 202 | ||
| 203 | #endif /* CC770_DEV_H */ |