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 }; 77 78 struct qcaspi { 79 struct net_device *net_dev; 80 struct spi_device *spi_dev; 81 struct task_struct *spi_thread; 82 83 struct tx_ring txr; 84 struct qcaspi_stats stats; 85 86 struct spi_message spi_msg1; 87 struct spi_message spi_msg2; 88 struct spi_transfer spi_xfer1; 89 struct spi_transfer spi_xfer2[2]; 90 91 u8 *rx_buffer; 92 u32 buffer_size; 93 u8 sync; 94 95 struct qcafrm_handle frm_handle; 96 struct sk_buff *rx_skb; 97 98 unsigned int intr_req; 99 unsigned int intr_svc; 100 101 #ifdef CONFIG_DEBUG_FS 102 struct dentry *device_root; 103 #endif 104 105 /* user configurable options */ 106 u32 clkspeed; 107 u8 legacy_mode; 108 u16 burst_len; 109 }; 110 111 #endif /* _QCA_SPI_H */ 112