1 /* 2 * CAN bus driver for Bosch C_CAN controller 3 * 4 * Copyright (C) 2010 ST Microelectronics 5 * Bhupesh Sharma <bhupesh.sharma@st.com> 6 * 7 * Borrowed heavily from the C_CAN driver originally written by: 8 * Copyright (C) 2007 9 * - Sascha Hauer, Marc Kleine-Budde, Pengutronix <s.hauer@pengutronix.de> 10 * - Simon Kallweit, intefo AG <simon.kallweit@intefo.ch> 11 * 12 * Bosch C_CAN controller is compliant to CAN protocol version 2.0 part A and B. 13 * Bosch C_CAN user manual can be obtained from: 14 * http://www.semiconductors.bosch.de/media/en/pdf/ipmodules_1/c_can/ 15 * users_manual_c_can.pdf 16 * 17 * This file is licensed under the terms of the GNU General Public 18 * License version 2. This program is licensed "as is" without any 19 * warranty of any kind, whether express or implied. 20 */ 21 22 #ifndef C_CAN_H 23 #define C_CAN_H 24 25 enum reg { 26 C_CAN_CTRL_REG = 0, 27 C_CAN_CTRL_EX_REG, 28 C_CAN_STS_REG, 29 C_CAN_ERR_CNT_REG, 30 C_CAN_BTR_REG, 31 C_CAN_INT_REG, 32 C_CAN_TEST_REG, 33 C_CAN_BRPEXT_REG, 34 C_CAN_IF1_COMREQ_REG, 35 C_CAN_IF1_COMMSK_REG, 36 C_CAN_IF1_MASK1_REG, 37 C_CAN_IF1_MASK2_REG, 38 C_CAN_IF1_ARB1_REG, 39 C_CAN_IF1_ARB2_REG, 40 C_CAN_IF1_MSGCTRL_REG, 41 C_CAN_IF1_DATA1_REG, 42 C_CAN_IF1_DATA2_REG, 43 C_CAN_IF1_DATA3_REG, 44 C_CAN_IF1_DATA4_REG, 45 C_CAN_IF2_COMREQ_REG, 46 C_CAN_IF2_COMMSK_REG, 47 C_CAN_IF2_MASK1_REG, 48 C_CAN_IF2_MASK2_REG, 49 C_CAN_IF2_ARB1_REG, 50 C_CAN_IF2_ARB2_REG, 51 C_CAN_IF2_MSGCTRL_REG, 52 C_CAN_IF2_DATA1_REG, 53 C_CAN_IF2_DATA2_REG, 54 C_CAN_IF2_DATA3_REG, 55 C_CAN_IF2_DATA4_REG, 56 C_CAN_TXRQST1_REG, 57 C_CAN_TXRQST2_REG, 58 C_CAN_NEWDAT1_REG, 59 C_CAN_NEWDAT2_REG, 60 C_CAN_INTPND1_REG, 61 C_CAN_INTPND2_REG, 62 C_CAN_MSGVAL1_REG, 63 C_CAN_MSGVAL2_REG, 64 }; 65 66 static const u16 reg_map_c_can[] = { 67 [C_CAN_CTRL_REG] = 0x00, 68 [C_CAN_STS_REG] = 0x02, 69 [C_CAN_ERR_CNT_REG] = 0x04, 70 [C_CAN_BTR_REG] = 0x06, 71 [C_CAN_INT_REG] = 0x08, 72 [C_CAN_TEST_REG] = 0x0A, 73 [C_CAN_BRPEXT_REG] = 0x0C, 74 [C_CAN_IF1_COMREQ_REG] = 0x10, 75 [C_CAN_IF1_COMMSK_REG] = 0x12, 76 [C_CAN_IF1_MASK1_REG] = 0x14, 77 [C_CAN_IF1_MASK2_REG] = 0x16, 78 [C_CAN_IF1_ARB1_REG] = 0x18, 79 [C_CAN_IF1_ARB2_REG] = 0x1A, 80 [C_CAN_IF1_MSGCTRL_REG] = 0x1C, 81 [C_CAN_IF1_DATA1_REG] = 0x1E, 82 [C_CAN_IF1_DATA2_REG] = 0x20, 83 [C_CAN_IF1_DATA3_REG] = 0x22, 84 [C_CAN_IF1_DATA4_REG] = 0x24, 85 [C_CAN_IF2_COMREQ_REG] = 0x40, 86 [C_CAN_IF2_COMMSK_REG] = 0x42, 87 [C_CAN_IF2_MASK1_REG] = 0x44, 88 [C_CAN_IF2_MASK2_REG] = 0x46, 89 [C_CAN_IF2_ARB1_REG] = 0x48, 90 [C_CAN_IF2_ARB2_REG] = 0x4A, 91 [C_CAN_IF2_MSGCTRL_REG] = 0x4C, 92 [C_CAN_IF2_DATA1_REG] = 0x4E, 93 [C_CAN_IF2_DATA2_REG] = 0x50, 94 [C_CAN_IF2_DATA3_REG] = 0x52, 95 [C_CAN_IF2_DATA4_REG] = 0x54, 96 [C_CAN_TXRQST1_REG] = 0x80, 97 [C_CAN_TXRQST2_REG] = 0x82, 98 [C_CAN_NEWDAT1_REG] = 0x90, 99 [C_CAN_NEWDAT2_REG] = 0x92, 100 [C_CAN_INTPND1_REG] = 0xA0, 101 [C_CAN_INTPND2_REG] = 0xA2, 102 [C_CAN_MSGVAL1_REG] = 0xB0, 103 [C_CAN_MSGVAL2_REG] = 0xB2, 104 }; 105 106 static const u16 reg_map_d_can[] = { 107 [C_CAN_CTRL_REG] = 0x00, 108 [C_CAN_CTRL_EX_REG] = 0x02, 109 [C_CAN_STS_REG] = 0x04, 110 [C_CAN_ERR_CNT_REG] = 0x08, 111 [C_CAN_BTR_REG] = 0x0C, 112 [C_CAN_BRPEXT_REG] = 0x0E, 113 [C_CAN_INT_REG] = 0x10, 114 [C_CAN_TEST_REG] = 0x14, 115 [C_CAN_TXRQST1_REG] = 0x88, 116 [C_CAN_TXRQST2_REG] = 0x8A, 117 [C_CAN_NEWDAT1_REG] = 0x9C, 118 [C_CAN_NEWDAT2_REG] = 0x9E, 119 [C_CAN_INTPND1_REG] = 0xB0, 120 [C_CAN_INTPND2_REG] = 0xB2, 121 [C_CAN_MSGVAL1_REG] = 0xC4, 122 [C_CAN_MSGVAL2_REG] = 0xC6, 123 [C_CAN_IF1_COMREQ_REG] = 0x100, 124 [C_CAN_IF1_COMMSK_REG] = 0x102, 125 [C_CAN_IF1_MASK1_REG] = 0x104, 126 [C_CAN_IF1_MASK2_REG] = 0x106, 127 [C_CAN_IF1_ARB1_REG] = 0x108, 128 [C_CAN_IF1_ARB2_REG] = 0x10A, 129 [C_CAN_IF1_MSGCTRL_REG] = 0x10C, 130 [C_CAN_IF1_DATA1_REG] = 0x110, 131 [C_CAN_IF1_DATA2_REG] = 0x112, 132 [C_CAN_IF1_DATA3_REG] = 0x114, 133 [C_CAN_IF1_DATA4_REG] = 0x116, 134 [C_CAN_IF2_COMREQ_REG] = 0x120, 135 [C_CAN_IF2_COMMSK_REG] = 0x122, 136 [C_CAN_IF2_MASK1_REG] = 0x124, 137 [C_CAN_IF2_MASK2_REG] = 0x126, 138 [C_CAN_IF2_ARB1_REG] = 0x128, 139 [C_CAN_IF2_ARB2_REG] = 0x12A, 140 [C_CAN_IF2_MSGCTRL_REG] = 0x12C, 141 [C_CAN_IF2_DATA1_REG] = 0x130, 142 [C_CAN_IF2_DATA2_REG] = 0x132, 143 [C_CAN_IF2_DATA3_REG] = 0x134, 144 [C_CAN_IF2_DATA4_REG] = 0x136, 145 }; 146 147 enum c_can_dev_id { 148 BOSCH_C_CAN_PLATFORM, 149 BOSCH_C_CAN, 150 BOSCH_D_CAN, 151 }; 152 153 /* c_can private data structure */ 154 struct c_can_priv { 155 struct can_priv can; /* must be the first member */ 156 struct napi_struct napi; 157 struct net_device *dev; 158 struct device *device; 159 int tx_object; 160 int current_status; 161 int last_status; 162 u16 (*read_reg) (struct c_can_priv *priv, enum reg index); 163 void (*write_reg) (struct c_can_priv *priv, enum reg index, u16 val); 164 void __iomem *base; 165 const u16 *regs; 166 unsigned long irq_flags; /* for request_irq() */ 167 unsigned int tx_next; 168 unsigned int tx_echo; 169 void *priv; /* for board-specific data */ 170 u16 irqstatus; 171 enum c_can_dev_id type; 172 u32 __iomem *raminit_ctrlreg; 173 unsigned int instance; 174 void (*raminit) (const struct c_can_priv *priv, bool enable); 175 }; 176 177 struct net_device *alloc_c_can_dev(void); 178 void free_c_can_dev(struct net_device *dev); 179 int register_c_can_dev(struct net_device *dev); 180 void unregister_c_can_dev(struct net_device *dev); 181 182 #ifdef CONFIG_PM 183 int c_can_power_up(struct net_device *dev); 184 int c_can_power_down(struct net_device *dev); 185 #endif 186 187 #endif /* C_CAN_H */ 188