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