include/linux/platform_data/dsa.h

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 #ifndef __DSA_PDATA_H
   3 #define __DSA_PDATA_H
   4
   5 struct device;
   6 struct net_device;
   7
   8 #define DSA_MAX_SWITCHES        4
   9 #define DSA_MAX_PORTS           12
  10 #define DSA_RTABLE_NONE         -1
  11
  12 struct dsa_chip_data {
  13         /*
  14          * How to access the switch configuration registers.
  15          */
  16         struct device   *host_dev;
  17         int             sw_addr;
  18
  19         /*
  20          * Reference to network devices
  21          */
  22         struct device   *netdev[DSA_MAX_PORTS];
  23
  24         /* set to size of eeprom if supported by the switch */
  25         int             eeprom_len;
  26
  27         /* Device tree node pointer for this specific switch chip
  28          * used during switch setup in case additional properties
  29          * and resources needs to be used
  30          */
  31         struct device_node *of_node;
  32
  33         /*
  34          * The names of the switch's ports.  Use "cpu" to
  35          * designate the switch port that the cpu is connected to,
  36          * "dsa" to indicate that this port is a DSA link to
  37          * another switch, NULL to indicate the port is unused,
  38          * or any other string to indicate this is a physical port.
  39          */
  40         char            *port_names[DSA_MAX_PORTS];
  41         struct device_node *port_dn[DSA_MAX_PORTS];
  42
  43         /*
  44          * An array of which element [a] indicates which port on this
  45          * switch should be used to send packets to that are destined
  46          * for switch a. Can be NULL if there is only one switch chip.
  47          */
  48         s8              rtable[DSA_MAX_SWITCHES];
  49 };
  50
  51 struct dsa_platform_data {
  52         /*
  53          * Reference to a Linux network interface that connects
  54          * to the root switch chip of the tree.
  55          */
  56         struct device   *netdev;
  57         struct net_device *of_netdev;
  58
  59         /*
  60          * Info structs describing each of the switch chips
  61          * connected via this network interface.
  62          */
  63         int             nr_chips;
  64         struct dsa_chip_data    *chip;
  65 };
  66
  67
  68 #endif /* __DSA_PDATA_H */