drivers/net/can/softing/softing.h

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