1 /*
2  *   Copyright (c) 2011, 2012, Qualcomm Atheros Communications Inc.
3  *   Copyright (c) 2014, I2SE GmbH
4  *
5  *   Permission to use, copy, modify, and/or distribute this software
6  *   for any purpose with or without fee is hereby granted, provided
7  *   that the above copyright notice and this permission notice appear
8  *   in all copies.
9  *
10  *   THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL
11  *   WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED
12  *   WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL
13  *   THE AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR
14  *   CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
15  *   LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT,
16  *   NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
17  *   CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
18  */
19 
20 /*   Qualcomm Atheros SPI register definition.
21  *
22  *   This module is designed to define the Qualcomm Atheros SPI register
23  *   placeholders;
24  */
25 
26 #ifndef _QCA_SPI_H
27 #define _QCA_SPI_H
28 
29 #include <linux/netdevice.h>
30 #include <linux/sched.h>
31 #include <linux/skbuff.h>
32 #include <linux/spi/spi.h>
33 #include <linux/types.h>
34 
35 #include "qca_7k_common.h"
36 
37 #define QCASPI_DRV_VERSION "0.2.7-i"
38 #define QCASPI_DRV_NAME    "qcaspi"
39 
40 #define QCASPI_GOOD_SIGNATURE 0xAA55
41 
42 #define TX_RING_MAX_LEN 10
43 #define TX_RING_MIN_LEN 2
44 
45 /* sync related constants */
46 #define QCASPI_SYNC_UNKNOWN 0
47 #define QCASPI_SYNC_RESET   1
48 #define QCASPI_SYNC_READY   2
49 
50 #define QCASPI_RESET_TIMEOUT 10
51 
52 /* sync events */
53 #define QCASPI_EVENT_UPDATE 0
54 #define QCASPI_EVENT_CPUON  1
55 
56 struct tx_ring {
57 	struct sk_buff *skb[TX_RING_MAX_LEN];
58 	u16 head;
59 	u16 tail;
60 	u16 size;
61 	u16 count;
62 };
63 
64 struct qcaspi_stats {
65 	u64 trig_reset;
66 	u64 device_reset;
67 	u64 reset_timeout;
68 	u64 read_err;
69 	u64 write_err;
70 	u64 read_buf_err;
71 	u64 write_buf_err;
72 	u64 out_of_mem;
73 	u64 write_buf_miss;
74 	u64 ring_full;
75 	u64 spi_err;
76 	u64 write_verify_failed;
77 };
78 
79 struct qcaspi {
80 	struct net_device *net_dev;
81 	struct spi_device *spi_dev;
82 	struct task_struct *spi_thread;
83 
84 	struct tx_ring txr;
85 	struct qcaspi_stats stats;
86 
87 	u8 *rx_buffer;
88 	u32 buffer_size;
89 	u8 sync;
90 
91 	struct qcafrm_handle frm_handle;
92 	struct sk_buff *rx_skb;
93 
94 	unsigned int intr_req;
95 	unsigned int intr_svc;
96 
97 #ifdef CONFIG_DEBUG_FS
98 	struct dentry *device_root;
99 #endif
100 
101 	/* user configurable options */
102 	u32 clkspeed;
103 	u8 legacy_mode;
104 	u16 burst_len;
105 };
106 
107 #endif /* _QCA_SPI_H */
108