• Home
  • Line#
  • Scopes#
  • Navigate#
  • Raw
  • Download
1 /*
2  * The generic setup file for PMC-Sierra MSP processors
3  *
4  * Copyright 2005-2007 PMC-Sierra, Inc,
5  * Author: Jun Sun, jsun@mvista.com or jsun@junsun.net
6  *
7  * This program is free software; you can redistribute	it and/or modify it
8  * under  the terms of	the GNU General	 Public License as published by the
9  * Free Software Foundation;  either version 2 of the  License, or (at your
10  * option) any later version.
11  */
12 
13 #include <asm/bootinfo.h>
14 #include <asm/cacheflush.h>
15 #include <asm/idle.h>
16 #include <asm/r4kcache.h>
17 #include <asm/reboot.h>
18 #include <asm/smp-ops.h>
19 #include <asm/time.h>
20 
21 #include <msp_prom.h>
22 #include <msp_regs.h>
23 
24 #if defined(CONFIG_PMC_MSP7120_GW)
25 #include <msp_regops.h>
26 #define MSP_BOARD_RESET_GPIO	9
27 #endif
28 
29 extern void msp_serial_setup(void);
30 
31 #if defined(CONFIG_PMC_MSP7120_EVAL) || \
32     defined(CONFIG_PMC_MSP7120_GW) || \
33     defined(CONFIG_PMC_MSP7120_FPGA)
34 /*
35  * Performs the reset for MSP7120-based boards
36  */
msp7120_reset(void)37 void msp7120_reset(void)
38 {
39 	void *start, *end, *iptr;
40 	register int i;
41 
42 	/* Diasble all interrupts */
43 	local_irq_disable();
44 #ifdef CONFIG_SYS_SUPPORTS_MULTITHREADING
45 	dvpe();
46 #endif
47 
48 	/* Cache the reset code of this function */
49 	__asm__ __volatile__ (
50 		"	.set	push				\n"
51 		"	.set	arch=r4000			\n"
52 		"	la	%0,startpoint			\n"
53 		"	la	%1,endpoint			\n"
54 		"	.set	pop				\n"
55 		: "=r" (start), "=r" (end)
56 		:
57 	);
58 
59 	for (iptr = (void *)((unsigned int)start & ~(L1_CACHE_BYTES - 1));
60 	     iptr < end; iptr += L1_CACHE_BYTES)
61 		cache_op(Fill, iptr);
62 
63 	__asm__ __volatile__ (
64 		"startpoint:					\n"
65 	);
66 
67 	/* Put the DDRC into self-refresh mode */
68 	DDRC_INDIRECT_WRITE(DDRC_CTL(10), 0xb, 1 << 16);
69 
70 	/*
71 	 * IMPORTANT!
72 	 * DO NOT do anything from here on out that might even
73 	 * think about fetching from RAM - i.e., don't call any
74 	 * non-inlined functions, and be VERY sure that any inline
75 	 * functions you do call do NOT access any sort of RAM
76 	 * anywhere!
77 	 */
78 
79 	/* Wait a bit for the DDRC to settle */
80 	for (i = 0; i < 100000000; i++);
81 
82 #if defined(CONFIG_PMC_MSP7120_GW)
83 	/*
84 	 * Set GPIO 9 HI, (tied to board reset logic)
85 	 * GPIO 9 is the 4th GPIO of register 3
86 	 *
87 	 * NOTE: We cannot use the higher-level msp_gpio_mode()/out()
88 	 * as GPIO char driver may not be enabled and it would look up
89 	 * data inRAM!
90 	 */
91 	set_value_reg32(GPIO_CFG3_REG, 0xf000, 0x8000);
92 	set_reg32(GPIO_DATA3_REG, 8);
93 
94 	/*
95 	 * In case GPIO9 doesn't reset the board (jumper configurable!)
96 	 * fallback to device reset below.
97 	 */
98 #endif
99 	/* Set bit 1 of the MSP7120 reset register */
100 	*RST_SET_REG = 0x00000001;
101 
102 	__asm__ __volatile__ (
103 		"endpoint:					\n"
104 	);
105 }
106 #endif
107 
msp_restart(char * command)108 void msp_restart(char *command)
109 {
110 	printk(KERN_WARNING "Now rebooting .......\n");
111 
112 #if defined(CONFIG_PMC_MSP7120_EVAL) || \
113     defined(CONFIG_PMC_MSP7120_GW) || \
114     defined(CONFIG_PMC_MSP7120_FPGA)
115 	msp7120_reset();
116 #else
117 	/* No chip-specific reset code, just jump to the ROM reset vector */
118 	set_c0_status(ST0_BEV | ST0_ERL);
119 	change_c0_config(CONF_CM_CMASK, CONF_CM_UNCACHED);
120 	flush_cache_all();
121 	write_c0_wired(0);
122 
123 	__asm__ __volatile__("jr\t%0"::"r"(0xbfc00000));
124 #endif
125 }
126 
msp_halt(void)127 void msp_halt(void)
128 {
129 	printk(KERN_WARNING "\n** You can safely turn off the power\n");
130 	while (1)
131 		/* If possible call official function to get CPU WARs */
132 		if (cpu_wait)
133 			(*cpu_wait)();
134 		else
135 			__asm__(".set\tmips3\n\t" "wait\n\t" ".set\tmips0");
136 }
137 
msp_power_off(void)138 void msp_power_off(void)
139 {
140 	msp_halt();
141 }
142 
plat_mem_setup(void)143 void __init plat_mem_setup(void)
144 {
145 	_machine_restart = msp_restart;
146 	_machine_halt = msp_halt;
147 	pm_power_off = msp_power_off;
148 }
149 
prom_init(void)150 void __init prom_init(void)
151 {
152 	unsigned long family;
153 	unsigned long revision;
154 
155 	prom_argc = fw_arg0;
156 	prom_argv = (char **)fw_arg1;
157 	prom_envp = (char **)fw_arg2;
158 
159 	/*
160 	 * Someday we can use this with PMON2000 to get a
161 	 * platform call prom routines for output etc. without
162 	 * having to use grody hacks.  For now it's unused.
163 	 *
164 	 * struct callvectors *cv = (struct callvectors *) fw_arg3;
165 	 */
166 	family = identify_family();
167 	revision = identify_revision();
168 
169 	switch (family) {
170 	case FAMILY_FPGA:
171 		if (FPGA_IS_MSP4200(revision)) {
172 			/* Old-style revision ID */
173 			mips_machtype = MACH_MSP4200_FPGA;
174 		} else {
175 			mips_machtype = MACH_MSP_OTHER;
176 		}
177 		break;
178 
179 	case FAMILY_MSP4200:
180 #if defined(CONFIG_PMC_MSP4200_EVAL)
181 		mips_machtype  = MACH_MSP4200_EVAL;
182 #elif defined(CONFIG_PMC_MSP4200_GW)
183 		mips_machtype  = MACH_MSP4200_GW;
184 #else
185 		mips_machtype = MACH_MSP_OTHER;
186 #endif
187 		break;
188 
189 	case FAMILY_MSP4200_FPGA:
190 		mips_machtype  = MACH_MSP4200_FPGA;
191 		break;
192 
193 	case FAMILY_MSP7100:
194 #if defined(CONFIG_PMC_MSP7120_EVAL)
195 		mips_machtype = MACH_MSP7120_EVAL;
196 #elif defined(CONFIG_PMC_MSP7120_GW)
197 		mips_machtype = MACH_MSP7120_GW;
198 #else
199 		mips_machtype = MACH_MSP_OTHER;
200 #endif
201 		break;
202 
203 	case FAMILY_MSP7100_FPGA:
204 		mips_machtype  = MACH_MSP7120_FPGA;
205 		break;
206 
207 	default:
208 		/* we don't recognize the machine */
209 		mips_machtype  = MACH_UNKNOWN;
210 		panic("***Bogosity factor five***, exiting");
211 		break;
212 	}
213 
214 	prom_init_cmdline();
215 
216 	prom_meminit();
217 
218 	/*
219 	 * Sub-system setup follows.
220 	 * Setup functions can	either be called here or using the
221 	 * subsys_initcall mechanism (i.e. see msp_pci_setup). The
222 	 * order in which they are called can be changed by using the
223 	 * link order in arch/mips/pmc-sierra/msp71xx/Makefile.
224 	 *
225 	 * NOTE: Please keep sub-system specific initialization code
226 	 * in separate specific files.
227 	 */
228 	msp_serial_setup();
229 
230 	register_vsmp_smp_ops();
231 }
232