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1/*
2 * Carsten Langgaard, carstenl@mips.com
3 * Copyright (C) 1999,2000 MIPS Technologies, Inc. All rights reserved.
4 *
5 * This program is free software; you can distribute it and/or modify it
6 * under the terms of the GNU General Public License (Version 2) as
7 * published by the Free Software Foundation.
8 *
9 * This program is distributed in the hope it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * for more details.
13 *
14 * You should have received a copy of the GNU General Public License along
15 * with this program; if not, write to the Free Software Foundation, Inc.,
16 * 59 Temple Place - Suite 330, Boston MA 02111-1307, USA.
17 *
18 * Putting things on the screen/serial line using YAMONs facilities.
19 */
20#include <linux/init.h>
21#include <linux/kernel.h>
22#include <linux/serial_reg.h>
23#include <linux/spinlock.h>
24#include <linux/export.h>
25#include <linux/string.h>
26#include <linux/io.h>
27#include <asm/bootinfo.h>
28
29#include <asm/mach-ar7/ar7.h>
30#include <asm/mach-ar7/prom.h>
31
32#define MAX_ENTRY 80
33
34struct env_var {
35 char *name;
36 char *value;
37};
38
39static struct env_var adam2_env[MAX_ENTRY];
40
41char *prom_getenv(const char *name)
42{
43 int i;
44
45 for (i = 0; (i < MAX_ENTRY) && adam2_env[i].name; i++)
46 if (!strcmp(name, adam2_env[i].name))
47 return adam2_env[i].value;
48
49 return NULL;
50}
51EXPORT_SYMBOL(prom_getenv);
52
53static void __init ar7_init_cmdline(int argc, char *argv[])
54{
55 int i;
56
57 for (i = 1; i < argc; i++) {
58 strlcat(arcs_cmdline, argv[i], COMMAND_LINE_SIZE);
59 if (i < (argc - 1))
60 strlcat(arcs_cmdline, " ", COMMAND_LINE_SIZE);
61 }
62}
63
64struct psbl_rec {
65 u32 psbl_size;
66 u32 env_base;
67 u32 env_size;
68 u32 ffs_base;
69 u32 ffs_size;
70};
71
72static const char psp_env_version[] __initconst = "TIENV0.8";
73
74struct psp_env_chunk {
75 u8 num;
76 u8 ctrl;
77 u16 csum;
78 u8 len;
79 char data[11];
80} __packed;
81
82struct psp_var_map_entry {
83 u8 num;
84 char *value;
85};
86
87static const struct psp_var_map_entry psp_var_map[] = {
88 { 1, "cpufrequency" },
89 { 2, "memsize" },
90 { 3, "flashsize" },
91 { 4, "modetty0" },
92 { 5, "modetty1" },
93 { 8, "maca" },
94 { 9, "macb" },
95 { 28, "sysfrequency" },
96 { 38, "mipsfrequency" },
97};
98
99/*
100
101Well-known variable (num is looked up in table above for matching variable name)
102Example: cpufrequency=211968000
103+----+----+----+----+----+----+----+----+----+----+----+----+----+----+----+---
104| 01 |CTRL|CHECKSUM | 01 | _2 | _1 | _1 | _9 | _6 | _8 | _0 | _0 | _0 | \0 | FF
105+----+----+----+----+----+----+----+----+----+----+----+----+----+----+----+---
106
107Name=Value pair in a single chunk
108Example: NAME=VALUE
109+----+----+----+----+----+----+----+----+----+----+----+----+----+----+----+---
110| 00 |CTRL|CHECKSUM | 01 | _N | _A | _M | _E | _0 | _V | _A | _L | _U | _E | \0
111+----+----+----+----+----+----+----+----+----+----+----+----+----+----+----+---
112
113Name=Value pair in 2 chunks (len is the number of chunks)
114Example: bootloaderVersion=1.3.7.15
115+----+----+----+----+----+----+----+----+----+----+----+----+----+----+----+---
116| 00 |CTRL|CHECKSUM | 02 | _b | _o | _o | _t | _l | _o | _a | _d | _e | _r | _V
117+----+----+----+----+----+----+----+----+----+----+----+----+----+----+----+---
118| _e | _r | _s | _i | _o | _n | \0 | _1 | _. | _3 | _. | _7 | _. | _1 | _5 | \0
119+----+----+----+----+----+----+----+----+----+----+----+----+----+----+----+---
120
121Data is padded with 0xFF
122
123*/
124
125#define PSP_ENV_SIZE 4096
126
127static char psp_env_data[PSP_ENV_SIZE] = { 0, };
128
129static char * __init lookup_psp_var_map(u8 num)
130{
131 int i;
132
133 for (i = 0; i < ARRAY_SIZE(psp_var_map); i++)
134 if (psp_var_map[i].num == num)
135 return psp_var_map[i].value;
136
137 return NULL;
138}
139
140static void __init add_adam2_var(char *name, char *value)
141{
142 int i;
143
144 for (i = 0; i < MAX_ENTRY; i++) {
145 if (!adam2_env[i].name) {
146 adam2_env[i].name = name;
147 adam2_env[i].value = value;
148 return;
149 } else if (!strcmp(adam2_env[i].name, name)) {
150 adam2_env[i].value = value;
151 return;
152 }
153 }
154}
155
156static int __init parse_psp_env(void *psp_env_base)
157{
158 int i, n;
159 char *name, *value;
160 struct psp_env_chunk *chunks = (struct psp_env_chunk *)psp_env_data;
161
162 memcpy_fromio(chunks, psp_env_base, PSP_ENV_SIZE);
163
164 i = 1;
165 n = PSP_ENV_SIZE / sizeof(struct psp_env_chunk);
166 while (i < n) {
167 if ((chunks[i].num == 0xff) || ((i + chunks[i].len) > n))
168 break;
169 value = chunks[i].data;
170 if (chunks[i].num) {
171 name = lookup_psp_var_map(chunks[i].num);
172 } else {
173 name = value;
174 value += strlen(name) + 1;
175 }
176 if (name)
177 add_adam2_var(name, value);
178 i += chunks[i].len;
179 }
180 return 0;
181}
182
183static void __init ar7_init_env(struct env_var *env)
184{
185 int i;
186 struct psbl_rec *psbl = (struct psbl_rec *)(KSEG1ADDR(0x14000300));
187 void *psp_env = (void *)KSEG1ADDR(psbl->env_base);
188
189 if (strcmp(psp_env, psp_env_version) == 0) {
190 parse_psp_env(psp_env);
191 } else {
192 for (i = 0; i < MAX_ENTRY; i++, env++)
193 if (env->name)
194 add_adam2_var(env->name, env->value);
195 }
196}
197
198static void __init console_config(void)
199{
200#ifdef CONFIG_SERIAL_8250_CONSOLE
201 char console_string[40];
202 int baud = 0;
203 char parity = '\0', bits = '\0', flow = '\0';
204 char *s, *p;
205
206 if (strstr(arcs_cmdline, "console="))
207 return;
208
209 s = prom_getenv("modetty0");
210 if (s) {
211 baud = simple_strtoul(s, &p, 10);
212 s = p;
213 if (*s == ',')
214 s++;
215 if (*s)
216 parity = *s++;
217 if (*s == ',')
218 s++;
219 if (*s)
220 bits = *s++;
221 if (*s == ',')
222 s++;
223 if (*s == 'h')
224 flow = 'r';
225 }
226
227 if (baud == 0)
228 baud = 38400;
229 if (parity != 'n' && parity != 'o' && parity != 'e')
230 parity = 'n';
231 if (bits != '7' && bits != '8')
232 bits = '8';
233
234 if (flow == 'r')
235 sprintf(console_string, " console=ttyS0,%d%c%c%c", baud,
236 parity, bits, flow);
237 else
238 sprintf(console_string, " console=ttyS0,%d%c%c", baud, parity,
239 bits);
240 strlcat(arcs_cmdline, console_string, COMMAND_LINE_SIZE);
241#endif
242}
243
244void __init prom_init(void)
245{
246 ar7_init_cmdline(fw_arg0, (char **)fw_arg1);
247 ar7_init_env((struct env_var *)fw_arg2);
248 console_config();
249}
250
251#define PORT(offset) (KSEG1ADDR(AR7_REGS_UART0 + (offset * 4)))
252static inline unsigned int serial_in(int offset)
253{
254 return readl((void *)PORT(offset));
255}
256
257static inline void serial_out(int offset, int value)
258{
259 writel(value, (void *)PORT(offset));
260}
261
262int prom_putchar(char c)
263{
264 while ((serial_in(UART_LSR) & UART_LSR_TEMT) == 0)
265 ;
266 serial_out(UART_TX, c);
267 return 1;
268}
1// SPDX-License-Identifier: GPL-2.0-only
2/*
3 * Carsten Langgaard, carstenl@mips.com
4 * Copyright (C) 1999,2000 MIPS Technologies, Inc. All rights reserved.
5 *
6 * Putting things on the screen/serial line using YAMONs facilities.
7 */
8#include <linux/init.h>
9#include <linux/kernel.h>
10#include <linux/serial_reg.h>
11#include <linux/spinlock.h>
12#include <linux/export.h>
13#include <linux/string.h>
14#include <linux/io.h>
15#include <asm/bootinfo.h>
16#include <asm/setup.h>
17
18#include <asm/mach-ar7/ar7.h>
19#include <asm/mach-ar7/prom.h>
20
21#define MAX_ENTRY 80
22
23struct env_var {
24 char *name;
25 char *value;
26};
27
28static struct env_var adam2_env[MAX_ENTRY];
29
30char *prom_getenv(const char *name)
31{
32 int i;
33
34 for (i = 0; (i < MAX_ENTRY) && adam2_env[i].name; i++)
35 if (!strcmp(name, adam2_env[i].name))
36 return adam2_env[i].value;
37
38 return NULL;
39}
40EXPORT_SYMBOL(prom_getenv);
41
42static void __init ar7_init_cmdline(int argc, char *argv[])
43{
44 int i;
45
46 for (i = 1; i < argc; i++) {
47 strlcat(arcs_cmdline, argv[i], COMMAND_LINE_SIZE);
48 if (i < (argc - 1))
49 strlcat(arcs_cmdline, " ", COMMAND_LINE_SIZE);
50 }
51}
52
53struct psbl_rec {
54 u32 psbl_size;
55 u32 env_base;
56 u32 env_size;
57 u32 ffs_base;
58 u32 ffs_size;
59};
60
61static const char psp_env_version[] __initconst = "TIENV0.8";
62
63struct psp_env_chunk {
64 u8 num;
65 u8 ctrl;
66 u16 csum;
67 u8 len;
68 char data[11];
69} __packed;
70
71struct psp_var_map_entry {
72 u8 num;
73 char *value;
74};
75
76static const struct psp_var_map_entry psp_var_map[] = {
77 { 1, "cpufrequency" },
78 { 2, "memsize" },
79 { 3, "flashsize" },
80 { 4, "modetty0" },
81 { 5, "modetty1" },
82 { 8, "maca" },
83 { 9, "macb" },
84 { 28, "sysfrequency" },
85 { 38, "mipsfrequency" },
86};
87
88/*
89
90Well-known variable (num is looked up in table above for matching variable name)
91Example: cpufrequency=211968000
92+----+----+----+----+----+----+----+----+----+----+----+----+----+----+----+---
93| 01 |CTRL|CHECKSUM | 01 | _2 | _1 | _1 | _9 | _6 | _8 | _0 | _0 | _0 | \0 | FF
94+----+----+----+----+----+----+----+----+----+----+----+----+----+----+----+---
95
96Name=Value pair in a single chunk
97Example: NAME=VALUE
98+----+----+----+----+----+----+----+----+----+----+----+----+----+----+----+---
99| 00 |CTRL|CHECKSUM | 01 | _N | _A | _M | _E | _0 | _V | _A | _L | _U | _E | \0
100+----+----+----+----+----+----+----+----+----+----+----+----+----+----+----+---
101
102Name=Value pair in 2 chunks (len is the number of chunks)
103Example: bootloaderVersion=1.3.7.15
104+----+----+----+----+----+----+----+----+----+----+----+----+----+----+----+---
105| 00 |CTRL|CHECKSUM | 02 | _b | _o | _o | _t | _l | _o | _a | _d | _e | _r | _V
106+----+----+----+----+----+----+----+----+----+----+----+----+----+----+----+---
107| _e | _r | _s | _i | _o | _n | \0 | _1 | _. | _3 | _. | _7 | _. | _1 | _5 | \0
108+----+----+----+----+----+----+----+----+----+----+----+----+----+----+----+---
109
110Data is padded with 0xFF
111
112*/
113
114#define PSP_ENV_SIZE 4096
115
116static char psp_env_data[PSP_ENV_SIZE] = { 0, };
117
118static char * __init lookup_psp_var_map(u8 num)
119{
120 int i;
121
122 for (i = 0; i < ARRAY_SIZE(psp_var_map); i++)
123 if (psp_var_map[i].num == num)
124 return psp_var_map[i].value;
125
126 return NULL;
127}
128
129static void __init add_adam2_var(char *name, char *value)
130{
131 int i;
132
133 for (i = 0; i < MAX_ENTRY; i++) {
134 if (!adam2_env[i].name) {
135 adam2_env[i].name = name;
136 adam2_env[i].value = value;
137 return;
138 } else if (!strcmp(adam2_env[i].name, name)) {
139 adam2_env[i].value = value;
140 return;
141 }
142 }
143}
144
145static int __init parse_psp_env(void *psp_env_base)
146{
147 int i, n;
148 char *name, *value;
149 struct psp_env_chunk *chunks = (struct psp_env_chunk *)psp_env_data;
150
151 memcpy_fromio(chunks, psp_env_base, PSP_ENV_SIZE);
152
153 i = 1;
154 n = PSP_ENV_SIZE / sizeof(struct psp_env_chunk);
155 while (i < n) {
156 if ((chunks[i].num == 0xff) || ((i + chunks[i].len) > n))
157 break;
158 value = chunks[i].data;
159 if (chunks[i].num) {
160 name = lookup_psp_var_map(chunks[i].num);
161 } else {
162 name = value;
163 value += strlen(name) + 1;
164 }
165 if (name)
166 add_adam2_var(name, value);
167 i += chunks[i].len;
168 }
169 return 0;
170}
171
172static void __init ar7_init_env(struct env_var *env)
173{
174 int i;
175 struct psbl_rec *psbl = (struct psbl_rec *)(KSEG1ADDR(0x14000300));
176 void *psp_env = (void *)KSEG1ADDR(psbl->env_base);
177
178 if (strcmp(psp_env, psp_env_version) == 0) {
179 parse_psp_env(psp_env);
180 } else {
181 for (i = 0; i < MAX_ENTRY; i++, env++)
182 if (env->name)
183 add_adam2_var(env->name, env->value);
184 }
185}
186
187static void __init console_config(void)
188{
189#ifdef CONFIG_SERIAL_8250_CONSOLE
190 char console_string[40];
191 int baud = 0;
192 char parity = '\0', bits = '\0', flow = '\0';
193 char *s, *p;
194
195 if (strstr(arcs_cmdline, "console="))
196 return;
197
198 s = prom_getenv("modetty0");
199 if (s) {
200 baud = simple_strtoul(s, &p, 10);
201 s = p;
202 if (*s == ',')
203 s++;
204 if (*s)
205 parity = *s++;
206 if (*s == ',')
207 s++;
208 if (*s)
209 bits = *s++;
210 if (*s == ',')
211 s++;
212 if (*s == 'h')
213 flow = 'r';
214 }
215
216 if (baud == 0)
217 baud = 38400;
218 if (parity != 'n' && parity != 'o' && parity != 'e')
219 parity = 'n';
220 if (bits != '7' && bits != '8')
221 bits = '8';
222
223 if (flow == 'r')
224 sprintf(console_string, " console=ttyS0,%d%c%c%c", baud,
225 parity, bits, flow);
226 else
227 sprintf(console_string, " console=ttyS0,%d%c%c", baud, parity,
228 bits);
229 strlcat(arcs_cmdline, console_string, COMMAND_LINE_SIZE);
230#endif
231}
232
233void __init prom_init(void)
234{
235 ar7_init_cmdline(fw_arg0, (char **)fw_arg1);
236 ar7_init_env((struct env_var *)fw_arg2);
237 console_config();
238}
239
240#define PORT(offset) (KSEG1ADDR(AR7_REGS_UART0 + (offset * 4)))
241static inline unsigned int serial_in(int offset)
242{
243 return readl((void *)PORT(offset));
244}
245
246static inline void serial_out(int offset, int value)
247{
248 writel(value, (void *)PORT(offset));
249}
250
251void prom_putchar(char c)
252{
253 while ((serial_in(UART_LSR) & UART_LSR_TEMT) == 0)
254 ;
255 serial_out(UART_TX, c);
256}