board/esd/vme8349/caddy.c

   1 // SPDX-License-Identifier: GPL-2.0+
   2 /*
   3  * caddy.c -- esd VME8349 support for "missing" access modes in TSI148.
   4  * Copyright (c) 2009 esd gmbh.
   5  *
   6  * Reinhard Arlt <reinhard.arlt@esd-electronics.com>
   7  */
   8
   9 #include <common.h>
  10 #include <command.h>
  11 #include <console.h>
  12 #include <ioports.h>
  13 #include <mpc83xx.h>
  14 #include <asm/mpc8349_pci.h>
  15 #include <pci.h>
  16 #include <asm/mmu.h>
  17 #include <asm/io.h>
  18
  19 #include "caddy.h"
  20
  21 static struct caddy_interface *caddy_interface;
  22
  23 void generate_answer(struct caddy_cmd *cmd, uint32_t status, uint32_t *result)
  24 {
  25         struct caddy_answer *answer;
  26         uint32_t ptr;
  27
  28         answer = &caddy_interface->answer[caddy_interface->answer_in];
  29         memset((void *)answer, 0, sizeof(struct caddy_answer));
  30         answer->answer = cmd->cmd;
  31         answer->issue = cmd->issue;
  32         answer->status = status;
  33         memcpy(answer->par, result, 5 * sizeof(result[0]));
  34         ptr = caddy_interface->answer_in + 1;
  35         ptr = ptr & (ANSWER_SIZE - 1);
  36         if (ptr != caddy_interface->answer_out)
  37                 caddy_interface->answer_in = ptr;
  38 }
  39
  40 int do_caddy(struct cmd_tbl *cmdtp, int flag, int argc, char *const argv[])
  41 {
  42         unsigned long base_addr;
  43         uint32_t ptr;
  44         struct caddy_cmd *caddy_cmd;
  45         uint32_t result[5];
  46         uint16_t data16;
  47         uint8_t data8;
  48         uint32_t status;
  49         pci_dev_t dev;
  50         void *pci_ptr;
  51
  52         if (argc < 2) {
  53                 puts("Missing parameter\n");
  54                 return 1;
  55         }
  56
  57         base_addr = simple_strtoul(argv[1], NULL, 16);
  58         caddy_interface = (struct caddy_interface *) base_addr;
  59
  60         memset((void *)caddy_interface, 0, sizeof(struct caddy_interface));
  61         memcpy((void *)&caddy_interface->magic[0], &CADDY_MAGIC, 16);
  62
  63         while (ctrlc() == 0) {
  64                 if (caddy_interface->cmd_in != caddy_interface->cmd_out) {
  65                         memset(result, 0, 5 * sizeof(result[0]));
  66                         status = 0;
  67                         caddy_cmd = &caddy_interface->cmd[caddy_interface->cmd_out];
  68                         pci_ptr = (void *)CONFIG_SYS_PCI1_IO_PHYS +
  69                                 (caddy_cmd->addr & 0x001fffff);
  70
  71                         switch (caddy_cmd->cmd) {
  72                         case CADDY_CMD_IO_READ_8:
  73                                 result[0] = in_8(pci_ptr);
  74                                 break;
  75
  76                         case CADDY_CMD_IO_READ_16:
  77                                 result[0] = in_be16(pci_ptr);
  78                                 break;
  79
  80                         case CADDY_CMD_IO_READ_32:
  81                                 result[0] = in_be32(pci_ptr);
  82                                 break;
  83
  84                         case CADDY_CMD_IO_WRITE_8:
  85                                 data8 = caddy_cmd->par[0] & 0x000000ff;
  86                                 out_8(pci_ptr, data8);
  87                                 break;
  88
  89                         case CADDY_CMD_IO_WRITE_16:
  90                                 data16 = caddy_cmd->par[0] & 0x0000ffff;
  91                                 out_be16(pci_ptr, data16);
  92                                 break;
  93
  94                         case CADDY_CMD_IO_WRITE_32:
  95                                 out_be32(pci_ptr, caddy_cmd->par[0]);
  96                                 break;
  97
  98                         case CADDY_CMD_CONFIG_READ_8:
  99                                 dev = PCI_BDF(caddy_cmd->par[0],
 100                                               caddy_cmd->par[1],
 101                                               caddy_cmd->par[2]);
 102                                 status = pci_read_config_byte(dev,
 103                                                               caddy_cmd->addr,
 104                                                               &data8);
 105                                 result[0] = data8;
 106                                 break;
 107
 108                         case CADDY_CMD_CONFIG_READ_16:
 109                                 dev = PCI_BDF(caddy_cmd->par[0],
 110                                               caddy_cmd->par[1],
 111                                               caddy_cmd->par[2]);
 112                                 status = pci_read_config_word(dev,
 113                                                               caddy_cmd->addr,
 114                                                               &data16);
 115                                 result[0] = data16;
 116                                 break;
 117
 118                         case CADDY_CMD_CONFIG_READ_32:
 119                                 dev = PCI_BDF(caddy_cmd->par[0],
 120                                               caddy_cmd->par[1],
 121                                               caddy_cmd->par[2]);
 122                                 status = pci_read_config_dword(dev,
 123                                                                caddy_cmd->addr,
 124                                                                &result[0]);
 125                                 break;
 126
 127                         case CADDY_CMD_CONFIG_WRITE_8:
 128                                 dev = PCI_BDF(caddy_cmd->par[0],
 129                                               caddy_cmd->par[1],
 130                                               caddy_cmd->par[2]);
 131                                 data8 = caddy_cmd->par[3] & 0x000000ff;
 132                                 status = pci_write_config_byte(dev,
 133                                                                caddy_cmd->addr,
 134                                                                data8);
 135                                 break;
 136
 137                         case CADDY_CMD_CONFIG_WRITE_16:
 138                                 dev = PCI_BDF(caddy_cmd->par[0],
 139                                               caddy_cmd->par[1],
 140                                               caddy_cmd->par[2]);
 141                                 data16 = caddy_cmd->par[3] & 0x0000ffff;
 142                                 status = pci_write_config_word(dev,
 143                                                                caddy_cmd->addr,
 144                                                                data16);
 145                                 break;
 146
 147                         case CADDY_CMD_CONFIG_WRITE_32:
 148                                 dev = PCI_BDF(caddy_cmd->par[0],
 149                                               caddy_cmd->par[1],
 150                                               caddy_cmd->par[2]);
 151                                 status = pci_write_config_dword(dev,
 152                                                                 caddy_cmd->addr,
 153                                                                 caddy_cmd->par[3]);
 154                                 break;
 155
 156                         default:
 157                                 status = 0xffffffff;
 158                                 break;
 159                         }
 160
 161                         generate_answer(caddy_cmd, status, &result[0]);
 162
 163                         ptr = caddy_interface->cmd_out + 1;
 164                         ptr = ptr & (CMD_SIZE - 1);
 165                         caddy_interface->cmd_out = ptr;
 166                 }
 167
 168                 caddy_interface->heartbeat++;
 169         }
 170
 171         return 0;
 172 }
 173
 174 U_BOOT_CMD(
 175         caddy,  2,      0,      do_caddy,
 176         "Start Caddy server.",
 177         "Start Caddy server with Data structure a given addr\n"
 178         );