1 /* 2 * caddy.c -- esd VME8349 support for "missing" access modes in TSI148. 3 * Copyright (c) 2009 esd gmbh. 4 * 5 * Reinhard Arlt <reinhard.arlt@esd-electronics.com> 6 * 7 * SPDX-License-Identifier: GPL-2.0+ 8 */ 9 10 #include <common.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(cmd_tbl_t *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 ); 179