summaryrefslogtreecommitdiffstats
path: root/arch/mips/pmcs-msp71xx/msp_prom.c
blob: ef620a4c82a561da1ceaa18e61631b4832c3c1df (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
/*
 * BRIEF MODULE DESCRIPTION
 *    PROM library initialisation code, assuming a version of
 *    pmon is the boot code.
 *
 * Copyright 2000,2001 MontaVista Software Inc.
 * Author: MontaVista Software, Inc.
 *         	ppopov@mvista.com or source@mvista.com
 *
 * This file was derived from Carsten Langgaard's
 * arch/mips/mips-boards/xx files.
 *
 * Carsten Langgaard, carstenl@mips.com
 * Copyright (C) 1999,2000 MIPS Technologies, Inc.  All rights reserved.
 *
 *  This program is free software; you can redistribute  it and/or modify it
 *  under  the terms of  the GNU General  Public License as published by the
 *  Free Software Foundation;  either version 2 of the  License, or (at your
 *  option) any later version.
 *
 *  THIS  SOFTWARE  IS PROVIDED   ``AS  IS'' AND   ANY  EXPRESS OR IMPLIED
 *  WARRANTIES,   INCLUDING, BUT NOT  LIMITED  TO, THE IMPLIED WARRANTIES OF
 *  MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN
 *  NO  EVENT  SHALL   THE AUTHOR  BE    LIABLE FOR ANY   DIRECT, INDIRECT,
 *  INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
 *  NOT LIMITED   TO, PROCUREMENT OF  SUBSTITUTE GOODS  OR SERVICES; LOSS OF
 *  USE, DATA,  OR PROFITS; OR  BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
 *  ANY THEORY OF LIABILITY, WHETHER IN  CONTRACT, STRICT LIABILITY, OR TORT
 *  (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
 *  THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 *
 *  You should have received a copy of the  GNU General Public License along
 *  with this program; if not, write  to the Free Software Foundation, Inc.,
 *  675 Mass Ave, Cambridge, MA 02139, USA.
 */

#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/string.h>
#include <linux/interrupt.h>
#include <linux/mm.h>
#include <linux/slab.h>

#include <asm/addrspace.h>
#include <asm/bootinfo.h>
#include <asm-generic/sections.h>
#include <asm/page.h>

#include <msp_prom.h>
#include <msp_regs.h>

/* global PROM environment variables and pointers */
int prom_argc;
char **prom_argv, **prom_envp;
int *prom_vec;

/* debug flag */
int init_debug = 1;

/* memory blocks */
struct prom_pmemblock mdesc[PROM_MAX_PMEMBLOCKS];

/* default feature sets */
static char msp_default_features[] =
#if defined(CONFIG_PMC_MSP4200_EVAL) \
 || defined(CONFIG_PMC_MSP4200_GW)
	"ERER";
#elif defined(CONFIG_PMC_MSP7120_EVAL) \
 || defined(CONFIG_PMC_MSP7120_GW)
	"EMEMSP";
#elif defined(CONFIG_PMC_MSP7120_FPGA)
	"EMEM";
#endif

/* conversion functions */
static inline unsigned char str2hexnum(unsigned char c)
{
	if (c >= '0' && c <= '9')
		return c - '0';
	if (c >= 'a' && c <= 'f')
		return c - 'a' + 10;
	return 0; /* foo */
}

int str2eaddr(unsigned char *ea, unsigned char *str)
{
	int index = 0;
	unsigned char num = 0;

	while (*str != '\0') {
		if ((*str == '.') || (*str == ':')) {
			ea[index++] = num;
			num = 0;
			str++;
		} else {
			num = num << 4;
			num |= str2hexnum(*str++);
		}
	}

	if (index == 5) {
		ea[index++] = num;
		return 0;
	} else
		return -1;
}
EXPORT_SYMBOL(str2eaddr);

static inline unsigned long str2hex(unsigned char *str)
{
	int value = 0;

	while (*str) {
		value = value << 4;
		value |= str2hexnum(*str++);
	}

	return value;
}

/* function to query the system information */
const char *get_system_type(void)
{
#if defined(CONFIG_PMC_MSP4200_EVAL)
	return "PMC-Sierra MSP4200 Eval Board";
#elif defined(CONFIG_PMC_MSP4200_GW)
	return "PMC-Sierra MSP4200 VoIP Gateway";
#elif defined(CONFIG_PMC_MSP7120_EVAL)
	return "PMC-Sierra MSP7120 Eval Board";
#elif defined(CONFIG_PMC_MSP7120_GW)
	return "PMC-Sierra MSP7120 Residential Gateway";
#elif defined(CONFIG_PMC_MSP7120_FPGA)
	return "PMC-Sierra MSP7120 FPGA";
#else
	#error "What is the type of *your* MSP?"
#endif
}

int get_ethernet_addr(char *ethaddr_name, char *ethernet_addr)
{
	char *ethaddr_str;

	ethaddr_str = prom_getenv(ethaddr_name);
	if (!ethaddr_str) {
		printk(KERN_WARNING "%s not set in boot prom\n", ethaddr_name);
		return -1;
	}

	if (str2eaddr(ethernet_addr, ethaddr_str) == -1) {
		printk(KERN_WARNING "%s badly formatted-<%s>\n",
			ethaddr_name, ethaddr_str);
		return -1;
	}

	if (init_debug > 1) {
		int i;
		printk(KERN_DEBUG "get_ethernet_addr: for %s ", ethaddr_name);
		for (i = 0; i < 5; i++)
			printk(KERN_DEBUG "%02x:",
				(unsigned char)*(ethernet_addr+i));
		printk(KERN_DEBUG "%02x\n", *(ethernet_addr+i));
	}

	return 0;
}
EXPORT_SYMBOL(get_ethernet_addr);

static char *get_features(void)
{
	char *feature = prom_getenv(FEATURES);

	if (feature == NULL) {
		/* default features based on MACHINE_TYPE */
		feature = msp_default_features;
	}

	return feature;
}

static char test_feature(char c)
{
	char *feature = get_features();

	while (*feature) {
		if (*feature++ == c)
			return *feature;
		feature++;
	}

	return FEATURE_NOEXIST;
}

unsigned long get_deviceid(void)
{
	char *deviceid = prom_getenv(DEVICEID);

	if (deviceid == NULL)
		return *DEV_ID_REG;
	else
		return str2hex(deviceid);
}

char identify_pci(void)
{
	return test_feature(PCI_KEY);
}
EXPORT_SYMBOL(identify_pci);

char identify_pcimux(void)
{
	return test_feature(PCIMUX_KEY);
}

char identify_sec(void)
{
	return test_feature(SEC_KEY);
}
EXPORT_SYMBOL(identify_sec);

char identify_spad(void)
{
	return test_feature(SPAD_KEY);
}
EXPORT_SYMBOL(identify_spad);

char identify_tdm(void)
{
	return test_feature(TDM_KEY);
}
EXPORT_SYMBOL(identify_tdm);

char identify_zsp(void)
{
	return test_feature(ZSP_KEY);
}
EXPORT_SYMBOL(identify_zsp);

static char identify_enetfeature(char key, unsigned long interface_num)
{
	char *feature = get_features();

	while (*feature) {
		if (*feature++ == key && interface_num-- == 0)
			return *feature;
		feature++;
	}

	return FEATURE_NOEXIST;
}

char identify_enet(unsigned long interface_num)
{
	return identify_enetfeature(ENET_KEY, interface_num);
}
EXPORT_SYMBOL(identify_enet);

char identify_enetTxD(unsigned long interface_num)
{
	return identify_enetfeature(ENETTXD_KEY, interface_num);
}
EXPORT_SYMBOL(identify_enetTxD);

unsigned long identify_family(void)
{
	unsigned long deviceid;

	deviceid = get_deviceid();

	return deviceid & CPU_DEVID_FAMILY;
}
EXPORT_SYMBOL(identify_family);

unsigned long identify_revision(void)
{
	unsigned long deviceid;

	deviceid = get_deviceid();

	return deviceid & CPU_DEVID_REVISION;
}
EXPORT_SYMBOL(identify_revision);

/* PROM environment functions */
char *prom_getenv(char *env_name)
{
	/*
	 * Return a pointer to the given environment variable.	prom_envp
	 * points to a null terminated array of pointers to variables.
	 * Environment variables are stored in the form of "memsize=64"
	 */

	char **var = prom_envp;
	int i = strlen(env_name);

	while (*var) {
		if (strncmp(env_name, *var, i) == 0) {
			return *var + strlen(env_name) + 1;
		}
		var++;
	}

	return NULL;
}

/* PROM commandline functions */
void  __init prom_init_cmdline(void)
{
	char *cp;
	int actr;

	actr = 1; /* Always ignore argv[0] */

	cp = &(arcs_cmdline[0]);
	while (actr < prom_argc) {
		strcpy(cp, prom_argv[actr]);
		cp += strlen(prom_argv[actr]);
		*cp++ = ' ';
		actr++;
	}
	if (cp != &(arcs_cmdline[0])) /* get rid of trailing space */
		--cp;
	*cp = '\0';
}

/* memory allocation functions */
static int __init prom_memtype_classify(unsigned int type)
{
	switch (type) {
	case yamon_free:
		return BOOT_MEM_RAM;
	case yamon_prom:
		return BOOT_MEM_ROM_DATA;
	default:
		return BOOT_MEM_RESERVED;
	}
}

void __init prom_meminit(void)
{
	struct prom_pmemblock *p;

	p = prom_getmdesc();

	while (p->size) {
		long type;
		unsigned long base, size;

		type = prom_memtype_classify(p->type);
		base = p->base;
		size = p->size;

		add_memory_region(base, size, type);
		p++;
	}
}

void __init prom_free_prom_memory(void)
{
	int	argc;
	char	**argv;
	char	**envp;
	char	*ptr;
	int	len = 0;
	int	i;
	unsigned long addr;

	/*
	 * preserve environment variables and command line from pmon/bbload
	 * first preserve the command line
	 */
	for (argc = 0; argc < prom_argc; argc++) {
		len += sizeof(char *);			/* length of pointer */
		len += strlen(prom_argv[argc]) + 1;	/* length of string */
	}
	len += sizeof(char *);		/* plus length of null pointer */

	argv = kmalloc(len, GFP_KERNEL);
	ptr = (char *) &argv[prom_argc + 1];	/* strings follow array */

	for (argc = 0; argc < prom_argc; argc++) {
		argv[argc] = ptr;
		strcpy(ptr, prom_argv[argc]);
		ptr += strlen(prom_argv[argc]) + 1;
	}
	argv[prom_argc] = NULL;		/* end array with null pointer */
	prom_argv = argv;

	/* next preserve the environment variables */
	len = 0;
	i = 0;
	for (envp = prom_envp; *envp != NULL; envp++) {
		i++;		/* count number of environment variables */
		len += sizeof(char *);		/* length of pointer */
		len += strlen(*envp) + 1;	/* length of string */
	}
	len += sizeof(char *);		/* plus length of null pointer */

	envp = kmalloc(len, GFP_KERNEL);
	ptr = (char *) &envp[i+1];

	for (argc = 0; argc < i; argc++) {
		envp[argc] = ptr;
		strcpy(ptr, prom_envp[argc]);
		ptr += strlen(prom_envp[argc]) + 1;
	}
	envp[i] = NULL;			/* end array with null pointer */
	prom_envp = envp;

	for (i = 0; i < boot_mem_map.nr_map; i++) {
		if (boot_mem_map.map[i].type != BOOT_MEM_ROM_DATA)
			continue;

		addr = boot_mem_map.map[i].addr;
		free_init_pages("prom memory",
				addr, addr + boot_mem_map.map[i].size);
	}
}

struct prom_pmemblock *__init prom_getmdesc(void)
{
	static char	memsz_env[] __initdata = "memsize";
	static char	heaptop_env[] __initdata = "heaptop";
	char		*str;
	unsigned int	memsize;
	unsigned int	heaptop;
	int i;

	str = prom_getenv(memsz_env);
	if (!str) {
		ppfinit("memsize not set in boot prom, "
			"set to default (32Mb)\n");
		memsize = 0x02000000;
	} else {
		memsize = simple_strtol(str, NULL, 0);

		if (memsize == 0) {
			/* if memsize is a bad size, use reasonable default */
			memsize = 0x02000000;
		}

		/* convert to physical address (removing caching bits, etc) */
		memsize = CPHYSADDR(memsize);
	}

	str = prom_getenv(heaptop_env);
	if (!str) {
		heaptop = CPHYSADDR((u32)&_text);
		ppfinit("heaptop not set in boot prom, "
			"set to default 0x%08x\n", heaptop);
	} else {
		heaptop = simple_strtol(str, NULL, 16);
		if (heaptop == 0) {
			/* heaptop conversion bad, might have 0xValue */
			heaptop = simple_strtol(str, NULL, 0);

			if (heaptop == 0) {
				/* heaptop still bad, use reasonable default */
				heaptop = CPHYSADDR((u32)&_text);
			}
		}

		/* convert to physical address (removing caching bits, etc) */
		heaptop = CPHYSADDR((u32)heaptop);
	}

	/* the base region */
	i = 0;
	mdesc[i].type = BOOT_MEM_RESERVED;
	mdesc[i].base = 0x00000000;
	mdesc[i].size = PAGE_ALIGN(0x300 + 0x80);
		/* jtag interrupt vector + sizeof vector */

	/* PMON data */
	if (heaptop > mdesc[i].base + mdesc[i].size) {
		i++;			/* 1 */
		mdesc[i].type = BOOT_MEM_ROM_DATA;
		mdesc[i].base = mdesc[i-1].base + mdesc[i-1].size;
		mdesc[i].size = heaptop - mdesc[i].base;
	}

	/* end of PMON data to start of kernel -- probably zero .. */
	if (heaptop != CPHYSADDR((u32)_text)) {
		i++;	/* 2 */
		mdesc[i].type = BOOT_MEM_RAM;
		mdesc[i].base = heaptop;
		mdesc[i].size = CPHYSADDR((u32)_text) - mdesc[i].base;
	}

	/*  kernel proper */
	i++;			/* 3 */
	mdesc[i].type = BOOT_MEM_RESERVED;
	mdesc[i].base = CPHYSADDR((u32)_text);
	mdesc[i].size = CPHYSADDR(PAGE_ALIGN((u32)_end)) - mdesc[i].base;

	/* Remainder of RAM -- under memsize */
	i++;			/* 5 */
	mdesc[i].type = yamon_free;
	mdesc[i].base = mdesc[i-1].base + mdesc[i-1].size;
	mdesc[i].size = memsize - mdesc[i].base;

	return &mdesc[0];
}
OpenPOWER on IntegriCloud