aboutsummaryrefslogtreecommitdiff
path: root/arch/powerpc/platforms/85xx/mpc85xx_ads.c
blob: 5eeff370f5fcaa7084f758110c2a1f710822a5c3 (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
/*
 * MPC85xx setup and early boot code plus other random bits.
 *
 * Maintained by Kumar Gala (see MAINTAINERS for contact information)
 *
 * Copyright 2005 Freescale Semiconductor Inc.
 *
 * 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.
 */

#include <linux/config.h>
#include <linux/stddef.h>
#include <linux/kernel.h>
#include <linux/pci.h>
#include <linux/kdev_t.h>
#include <linux/delay.h>
#include <linux/seq_file.h>
#include <linux/root_dev.h>

#include <asm/system.h>
#include <asm/time.h>
#include <asm/machdep.h>
#include <asm/pci-bridge.h>
#include <asm/mpc85xx.h>
#include <asm/prom.h>
#include <asm/mpic.h>
#include <mm/mmu_decl.h>
#include <asm/udbg.h>

#include <sysdev/fsl_soc.h>
#include "mpc85xx.h"

#ifndef CONFIG_PCI
unsigned long isa_io_base = 0;
unsigned long isa_mem_base = 0;
#endif

/*
 * Internal interrupts are all Level Sensitive, and Positive Polarity
 *
 * Note:  Likely, this table and the following function should be
 *        obtained and derived from the OF Device Tree.
 */
static u_char mpc85xx_ads_openpic_initsenses[] __initdata = {
	MPC85XX_INTERNAL_IRQ_SENSES,
	0x0,			/* External  0: */
#if defined(CONFIG_PCI)
	(IRQ_SENSE_LEVEL | IRQ_POLARITY_NEGATIVE),	/* Ext 1: PCI slot 0 */
	(IRQ_SENSE_LEVEL | IRQ_POLARITY_NEGATIVE),	/* Ext 2: PCI slot 1 */
	(IRQ_SENSE_LEVEL | IRQ_POLARITY_NEGATIVE),	/* Ext 3: PCI slot 2 */
	(IRQ_SENSE_LEVEL | IRQ_POLARITY_NEGATIVE),	/* Ext 4: PCI slot 3 */
#else
	0x0,			/* External  1: */
	0x0,			/* External  2: */
	0x0,			/* External  3: */
	0x0,			/* External  4: */
#endif
	(IRQ_SENSE_LEVEL | IRQ_POLARITY_NEGATIVE),	/* External 5: PHY */
	0x0,			/* External  6: */
	(IRQ_SENSE_LEVEL | IRQ_POLARITY_NEGATIVE),	/* External 7: PHY */
	0x0,			/* External  8: */
	0x0,			/* External  9: */
	0x0,			/* External 10: */
	0x0,			/* External 11: */
};

#ifdef CONFIG_PCI
/*
 * interrupt routing
 */

int
mpc85xx_map_irq(struct pci_dev *dev, unsigned char idsel, unsigned char pin)
{
	static char pci_irq_table[][4] =
	    /*
	     * This is little evil, but works around the fact
	     * that revA boards have IDSEL starting at 18
	     * and others boards (older) start at 12
	     *
	     *      PCI IDSEL/INTPIN->INTLINE
	     *       A      B      C      D
	     */
	{
		{PIRQA, PIRQB, PIRQC, PIRQD},	/* IDSEL 2 */
		{PIRQD, PIRQA, PIRQB, PIRQC},
		{PIRQC, PIRQD, PIRQA, PIRQB},
		{PIRQB, PIRQC, PIRQD, PIRQA},	/* IDSEL 5 */
		{0, 0, 0, 0},	/* -- */
		{0, 0, 0, 0},	/* -- */
		{0, 0, 0, 0},	/* -- */
		{0, 0, 0, 0},	/* -- */
		{0, 0, 0, 0},	/* -- */
		{0, 0, 0, 0},	/* -- */
		{PIRQA, PIRQB, PIRQC, PIRQD},	/* IDSEL 12 */
		{PIRQD, PIRQA, PIRQB, PIRQC},
		{PIRQC, PIRQD, PIRQA, PIRQB},
		{PIRQB, PIRQC, PIRQD, PIRQA},	/* IDSEL 15 */
		{0, 0, 0, 0},	/* -- */
		{0, 0, 0, 0},	/* -- */
		{PIRQA, PIRQB, PIRQC, PIRQD},	/* IDSEL 18 */
		{PIRQD, PIRQA, PIRQB, PIRQC},
		{PIRQC, PIRQD, PIRQA, PIRQB},
		{PIRQB, PIRQC, PIRQD, PIRQA},	/* IDSEL 21 */
	};

	const long min_idsel = 2, max_idsel = 21, irqs_per_slot = 4;
	return PCI_IRQ_TABLE_LOOKUP;
}

int
mpc85xx_exclude_device(u_char bus, u_char devfn)
{
	if (bus == 0 && PCI_SLOT(devfn) == 0)
		return PCIBIOS_DEVICE_NOT_FOUND;
	else
		return PCIBIOS_SUCCESSFUL;
}

#endif /* CONFIG_PCI */


void __init mpc85xx_ads_pic_init(void)
{
	struct mpic *mpic1;
	phys_addr_t OpenPIC_PAddr;

	/* Determine the Physical Address of the OpenPIC regs */
	OpenPIC_PAddr = get_immrbase() + MPC85xx_OPENPIC_OFFSET;

	mpic1 = mpic_alloc(OpenPIC_PAddr,
			   MPIC_PRIMARY | MPIC_WANTS_RESET | MPIC_BIG_ENDIAN,
			   4, MPC85xx_OPENPIC_IRQ_OFFSET, 0, 250,
			   mpc85xx_ads_openpic_initsenses,
			   sizeof(mpc85xx_ads_openpic_initsenses),
			   " OpenPIC  ");
	BUG_ON(mpic1 == NULL);
	mpic_assign_isu(mpic1, 0, OpenPIC_PAddr + 0x10200);
	mpic_assign_isu(mpic1, 1, OpenPIC_PAddr + 0x10280);
	mpic_assign_isu(mpic1, 2, OpenPIC_PAddr + 0x10300);
	mpic_assign_isu(mpic1, 3, OpenPIC_PAddr + 0x10380);
	mpic_assign_isu(mpic1, 4, OpenPIC_PAddr + 0x10400);
	mpic_assign_isu(mpic1, 5, OpenPIC_PAddr + 0x10480);
	mpic_assign_isu(mpic1, 6, OpenPIC_PAddr + 0x10500);
	mpic_assign_isu(mpic1, 7, OpenPIC_PAddr + 0x10580);

	/* dummy mappings to get to 48 */
	mpic_assign_isu(mpic1, 8, OpenPIC_PAddr + 0x10600);
	mpic_assign_isu(mpic1, 9, OpenPIC_PAddr + 0x10680);
	mpic_assign_isu(mpic1, 10, OpenPIC_PAddr + 0x10700);
	mpic_assign_isu(mpic1, 11, OpenPIC_PAddr + 0x10780);

	/* External ints */
	mpic_assign_isu(mpic1, 12, OpenPIC_PAddr + 0x10000);
	mpic_assign_isu(mpic1, 13, OpenPIC_PAddr + 0x10080);
	mpic_assign_isu(mpic1, 14, OpenPIC_PAddr + 0x10100);
	mpic_init(mpic1);
}

/*
 * Setup the architecture
 */
static void __init mpc85xx_ads_setup_arch(void)
{
	struct device_node *cpu;
	struct device_node *np;

	if (ppc_md.progress)
		ppc_md.progress("mpc85xx_ads_setup_arch()", 0);

	cpu = of_find_node_by_type(NULL, "cpu");
	if (cpu != 0) {
		unsigned int *fp;

		fp = (int *)get_property(cpu, "clock-frequency", NULL);
		if (fp != 0)
			loops_per_jiffy = *fp / HZ;
		else
			loops_per_jiffy = 50000000 / HZ;
		of_node_put(cpu);
	}

#ifdef CONFIG_PCI
	for (np = NULL; (np = of_find_node_by_type(np, "pci")) != NULL;)
		add_bridge(np);

	ppc_md.pci_swizzle = common_swizzle;
	ppc_md.pci_map_irq = mpc85xx_map_irq;
	ppc_md.pci_exclude_device = mpc85xx_exclude_device;
#endif

#ifdef  CONFIG_ROOT_NFS
	ROOT_DEV = Root_NFS;
#else
	ROOT_DEV = Root_HDA1;
#endif
}

void mpc85xx_ads_show_cpuinfo(struct seq_file *m)
{
	uint pvid, svid, phid1;
	uint memsize = total_memory;

	pvid = mfspr(SPRN_PVR);
	svid = mfspr(SPRN_SVR);

	seq_printf(m, "Vendor\t\t: Freescale Semiconductor\n");
	seq_printf(m, "Machine\t\t: mpc85xx\n");
	seq_printf(m, "PVR\t\t: 0x%x\n", pvid);
	seq_printf(m, "SVR\t\t: 0x%x\n", svid);

	/* Display cpu Pll setting */
	phid1 = mfspr(SPRN_HID1);
	seq_printf(m, "PLL setting\t: 0x%x\n", ((phid1 >> 24) & 0x3f));

	/* Display the amount of memory */
	seq_printf(m, "Memory\t\t: %d MB\n", memsize / (1024 * 1024));
}

/*
 * Called very early, device-tree isn't unflattened
 */
static int __init mpc85xx_ads_probe(void)
{
	/* We always match for now, eventually we should look at the flat
	   dev tree to ensure this is the board we are suppose to run on
	*/
	return 1;
}

define_machine(mpc85xx_ads) {
	.name			= "MPC85xx ADS",
	.probe			= mpc85xx_ads_probe,
	.setup_arch		= mpc85xx_ads_setup_arch,
	.init_IRQ		= mpc85xx_ads_pic_init,
	.show_cpuinfo		= mpc85xx_ads_show_cpuinfo,
	.get_irq		= mpic_get_irq,
	.restart		= mpc85xx_restart,
	.calibrate_decr		= generic_calibrate_decr,
	.progress		= udbg_progress,
};