1 | /* SPDX-License-Identifier: GPL-2.0 */ |
2 | /* |
3 | * softing common interfaces |
4 | * |
5 | * by Kurt Van Dijck, 2008-2010 |
6 | */ |
7 | |
8 | #include <linux/atomic.h> |
9 | #include <linux/netdevice.h> |
10 | #include <linux/ktime.h> |
11 | #include <linux/mutex.h> |
12 | #include <linux/spinlock.h> |
13 | #include <linux/can.h> |
14 | #include <linux/can/dev.h> |
15 | |
16 | #include "softing_platform.h" |
17 | |
18 | struct softing; |
19 | |
20 | struct softing_priv { |
21 | struct can_priv can; /* must be the first member! */ |
22 | struct net_device *netdev; |
23 | struct softing *card; |
24 | struct { |
25 | int pending; |
26 | /* variables which hold the circular buffer */ |
27 | int echo_put; |
28 | int echo_get; |
29 | } tx; |
30 | struct can_bittiming_const btr_const; |
31 | int index; |
32 | uint8_t output; |
33 | uint16_t chip; |
34 | }; |
35 | #define netdev2softing(netdev) ((struct softing_priv *)netdev_priv(netdev)) |
36 | |
37 | struct softing { |
38 | const struct softing_platform_data *pdat; |
39 | struct platform_device *pdev; |
40 | struct net_device *net[2]; |
41 | spinlock_t spin; /* protect this structure & DPRAM access */ |
42 | ktime_t ts_ref; |
43 | ktime_t ts_overflow; /* timestamp overflow value, in ktime */ |
44 | |
45 | struct { |
46 | /* indication of firmware status */ |
47 | int up; |
48 | /* protection of the 'up' variable */ |
49 | struct mutex lock; |
50 | } fw; |
51 | struct { |
52 | int nr; |
53 | int requested; |
54 | int svc_count; |
55 | unsigned int dpram_position; |
56 | } irq; |
57 | struct { |
58 | int pending; |
59 | int last_bus; |
60 | /* |
61 | * keep the bus that last tx'd a message, |
62 | * in order to let every netdev queue resume |
63 | */ |
64 | } tx; |
65 | __iomem uint8_t *dpram; |
66 | unsigned long dpram_phys; |
67 | unsigned long dpram_size; |
68 | struct { |
69 | uint16_t fw_version, hw_version, license, serial; |
70 | uint16_t chip[2]; |
71 | unsigned int freq; /* remote cpu's operating frequency */ |
72 | } id; |
73 | }; |
74 | |
75 | int softing_default_output(struct net_device *netdev); |
76 | |
77 | ktime_t softing_raw2ktime(struct softing *card, u32 raw); |
78 | |
79 | int softing_chip_poweron(struct softing *card); |
80 | |
81 | int softing_bootloader_command(struct softing *card, int16_t cmd, |
82 | const char *msg); |
83 | |
84 | /* Load firmware after reset */ |
85 | int softing_load_fw(const char *file, struct softing *card, |
86 | __iomem uint8_t *virt, unsigned int size, int offset); |
87 | |
88 | /* Load final application firmware after bootloader */ |
89 | int softing_load_app_fw(const char *file, struct softing *card); |
90 | |
91 | /* |
92 | * enable or disable irq |
93 | * only called with fw.lock locked |
94 | */ |
95 | int softing_enable_irq(struct softing *card, int enable); |
96 | |
97 | /* start/stop 1 bus on card */ |
98 | int softing_startstop(struct net_device *netdev, int up); |
99 | |
100 | /* netif_rx() */ |
101 | int softing_netdev_rx(struct net_device *netdev, const struct can_frame *msg, |
102 | ktime_t ktime); |
103 | |
104 | /* SOFTING DPRAM mappings */ |
105 | #define DPRAM_RX 0x0000 |
106 | #define DPRAM_RX_SIZE 32 |
107 | #define DPRAM_RX_CNT 16 |
108 | #define DPRAM_RX_RD 0x0201 /* uint8_t */ |
109 | #define DPRAM_RX_WR 0x0205 /* uint8_t */ |
110 | #define DPRAM_RX_LOST 0x0207 /* uint8_t */ |
111 | |
112 | #define DPRAM_FCT_PARAM 0x0300 /* int16_t [20] */ |
113 | #define DPRAM_FCT_RESULT 0x0328 /* int16_t */ |
114 | #define DPRAM_FCT_HOST 0x032b /* uint16_t */ |
115 | |
116 | #define DPRAM_INFO_BUSSTATE 0x0331 /* uint16_t */ |
117 | #define DPRAM_INFO_BUSSTATE2 0x0335 /* uint16_t */ |
118 | #define DPRAM_INFO_ERRSTATE 0x0339 /* uint16_t */ |
119 | #define DPRAM_INFO_ERRSTATE2 0x033d /* uint16_t */ |
120 | #define DPRAM_RESET 0x0341 /* uint16_t */ |
121 | #define DPRAM_CLR_RECV_FIFO 0x0345 /* uint16_t */ |
122 | #define DPRAM_RESET_TIME 0x034d /* uint16_t */ |
123 | #define DPRAM_TIME 0x0350 /* uint64_t */ |
124 | #define DPRAM_WR_START 0x0358 /* uint8_t */ |
125 | #define DPRAM_WR_END 0x0359 /* uint8_t */ |
126 | #define DPRAM_RESET_RX_FIFO 0x0361 /* uint16_t */ |
127 | #define DPRAM_RESET_TX_FIFO 0x0364 /* uint8_t */ |
128 | #define DPRAM_READ_FIFO_LEVEL 0x0365 /* uint8_t */ |
129 | #define DPRAM_RX_FIFO_LEVEL 0x0366 /* uint16_t */ |
130 | #define DPRAM_TX_FIFO_LEVEL 0x0366 /* uint16_t */ |
131 | |
132 | #define DPRAM_TX 0x0400 /* uint16_t */ |
133 | #define DPRAM_TX_SIZE 16 |
134 | #define DPRAM_TX_CNT 32 |
135 | #define DPRAM_TX_RD 0x0601 /* uint8_t */ |
136 | #define DPRAM_TX_WR 0x0605 /* uint8_t */ |
137 | |
138 | #define DPRAM_COMMAND 0x07e0 /* uint16_t */ |
139 | #define DPRAM_RECEIPT 0x07f0 /* uint16_t */ |
140 | #define DPRAM_IRQ_TOHOST 0x07fe /* uint8_t */ |
141 | #define DPRAM_IRQ_TOCARD 0x07ff /* uint8_t */ |
142 | |
143 | #define DPRAM_V2_RESET 0x0e00 /* uint8_t */ |
144 | #define DPRAM_V2_IRQ_TOHOST 0x0e02 /* uint8_t */ |
145 | |
146 | #define TXMAX (DPRAM_TX_CNT - 1) |
147 | |
148 | /* DPRAM return codes */ |
149 | #define RES_NONE 0 |
150 | #define RES_OK 1 |
151 | #define RES_NOK 2 |
152 | #define RES_UNKNOWN 3 |
153 | /* DPRAM flags */ |
154 | #define CMD_TX 0x01 |
155 | #define CMD_ACK 0x02 |
156 | #define CMD_XTD 0x04 |
157 | #define CMD_RTR 0x08 |
158 | #define CMD_ERR 0x10 |
159 | #define CMD_BUS2 0x80 |
160 | |
161 | /* returned fifo entry bus state masks */ |
162 | #define SF_MASK_BUSOFF 0x80 |
163 | #define SF_MASK_EPASSIVE 0x60 |
164 | |
165 | /* bus states */ |
166 | #define STATE_BUSOFF 2 |
167 | #define STATE_EPASSIVE 1 |
168 | #define STATE_EACTIVE 0 |
169 | |