summaryrefslogtreecommitdiff
path: root/arch/ppc/platforms/lite5200.c
blob: d44cc991179fddef3afbbdbe697b63726d8f53d7 (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
/*
 * arch/ppc/platforms/lite5200.c
 *
 * Platform support file for the Freescale LITE5200 based on MPC52xx.
 * A maximum of this file should be moved to syslib/mpc52xx_?????
 * so that new platform based on MPC52xx need a minimal platform file
 * ( avoid code duplication )
 *
 * 
 * Maintainer : Sylvain Munaut <tnt@246tNt.com>
 *
 * Based on the 2.4 code written by Kent Borg,
 * Dale Farnsworth <dale.farnsworth@mvista.com> and
 * Wolfgang Denk <wd@denx.de>
 * 
 * Copyright 2004-2005 Sylvain Munaut <tnt@246tNt.com>
 * Copyright 2003 Motorola Inc.
 * Copyright 2003 MontaVista Software Inc.
 * Copyright 2003 DENX Software Engineering (wd@denx.de)
 *
 * This file is licensed under the terms of the GNU General Public License
 * version 2. This program is licensed "as is" without any warranty of any
 * kind, whether express or implied.
 */

#include <linux/config.h>
#include <linux/initrd.h>
#include <linux/seq_file.h>
#include <linux/kdev_t.h>
#include <linux/root_dev.h>
#include <linux/console.h>
#include <linux/module.h>

#include <asm/bootinfo.h>
#include <asm/io.h>
#include <asm/mpc52xx.h>
#include <asm/ppc_sys.h>
#include <asm/machdep.h>

#include <syslib/mpc52xx_pci.h>


extern int powersave_nap;

/* Board data given by U-Boot */
bd_t __res;
EXPORT_SYMBOL(__res);	/* For modules */


/* ======================================================================== */
/* Platform specific code                                                   */
/* ======================================================================== */

/* Supported PSC function in "preference" order */
struct mpc52xx_psc_func mpc52xx_psc_functions[] = {
		{       .id     = 0,
			.func   = "uart",
		},
		{       .id     = -1,   /* End entry */
			.func   = NULL,
		}
	};


static int
lite5200_show_cpuinfo(struct seq_file *m)
{
	seq_printf(m, "machine\t\t: Freescale LITE5200\n");
	return 0;
}

#ifdef CONFIG_PCI
static int
lite5200_map_irq(struct pci_dev *dev, unsigned char idsel, unsigned char pin)
{
	return (pin == 1) && (idsel==24) ? MPC52xx_IRQ0 : -1;
}
#endif

static void __init
lite5200_setup_cpu(void)
{
	struct mpc52xx_cdm  __iomem *cdm;
	struct mpc52xx_gpio __iomem *gpio;
	struct mpc52xx_intr __iomem *intr;
	struct mpc52xx_xlb  __iomem *xlb;

	u32 port_config;
	u32 intr_ctrl;

	/* Map zones */
	cdm  = ioremap(MPC52xx_PA(MPC52xx_CDM_OFFSET), MPC52xx_CDM_SIZE);
	gpio = ioremap(MPC52xx_PA(MPC52xx_GPIO_OFFSET), MPC52xx_GPIO_SIZE);
	xlb  = ioremap(MPC52xx_PA(MPC52xx_XLB_OFFSET), MPC52xx_XLB_SIZE);
	intr = ioremap(MPC52xx_PA(MPC52xx_INTR_OFFSET), MPC52xx_INTR_SIZE);

	if (!cdm || !gpio || !xlb || !intr) {
		printk("lite5200.c: Error while mapping CDM/GPIO/XLB/INTR during"
				"lite5200_setup_cpu\n");
		goto unmap_regs;
	}

	/* Use internal 48 Mhz */
	out_8(&cdm->ext_48mhz_en, 0x00);
	out_8(&cdm->fd_enable, 0x01);
	if (in_be32(&cdm->rstcfg) & 0x40)	/* Assumes 33Mhz clock */
		out_be16(&cdm->fd_counters, 0x0001);
	else
		out_be16(&cdm->fd_counters, 0x5555);

	/* Get port mux config */
	port_config = in_be32(&gpio->port_config);

	/* 48Mhz internal, pin is GPIO */
	port_config &= ~0x00800000;

	/* USB port */
	port_config &= ~0x00007000;	/* Differential mode - USB1 only */
	port_config |=  0x00001000;

	/* Commit port config */
	out_be32(&gpio->port_config, port_config);

	/* Configure the XLB Arbiter */
	out_be32(&xlb->master_pri_enable, 0xff);
	out_be32(&xlb->master_priority, 0x11111111);

	/* Enable ram snooping for 1GB window */
	out_be32(&xlb->config, in_be32(&xlb->config) | MPC52xx_XLB_CFG_SNOOP);
	out_be32(&xlb->snoop_window, MPC52xx_PCI_TARGET_MEM | 0x1d);

	/* IRQ[0-3] setup : IRQ0     - Level Active Low  */
	/*                  IRQ[1-3] - Level Active High */
	intr_ctrl = in_be32(&intr->ctrl);
	intr_ctrl &= ~0x00ff0000;
	intr_ctrl |=  0x00c00000;
	out_be32(&intr->ctrl, intr_ctrl);

	/* Unmap reg zone */
unmap_regs:
	if (cdm)  iounmap(cdm);
	if (gpio) iounmap(gpio);
	if (xlb)  iounmap(xlb);
	if (intr) iounmap(intr);
}

static void __init
lite5200_setup_arch(void)
{
	/* CPU & Port mux setup */
	lite5200_setup_cpu();

#ifdef CONFIG_PCI
	/* PCI Bridge setup */
	mpc52xx_find_bridges();
#endif
}

void __init
platform_init(unsigned long r3, unsigned long r4, unsigned long r5,
              unsigned long r6, unsigned long r7)
{
	/* Generic MPC52xx platform initialization */
	/* TODO Create one and move a max of stuff in it.
	   Put this init in the syslib */

	struct bi_record *bootinfo = find_bootinfo();

	if (bootinfo)
		parse_bootinfo(bootinfo);
	else {
		/* Load the bd_t board info structure */
		if (r3)
			memcpy((void*)&__res,(void*)(r3+KERNELBASE),
					sizeof(bd_t));

#ifdef CONFIG_BLK_DEV_INITRD
		/* Load the initrd */
		if (r4) {
			initrd_start = r4 + KERNELBASE;
			initrd_end = r5 + KERNELBASE;
		}
#endif

		/* Load the command line */
		if (r6) {
			*(char *)(r7+KERNELBASE) = 0;
			strcpy(cmd_line, (char *)(r6+KERNELBASE));
		}
	}

	/* PPC Sys identification */
	identify_ppc_sys_by_id(mfspr(SPRN_SVR));

	/* BAT setup */
	mpc52xx_set_bat();

	/* No ISA bus by default */
	isa_io_base		= 0;
	isa_mem_base		= 0;

	/* Powersave */
	/* This is provided as an example on how to do it. But you
	   need to be aware that NAP disable bus snoop and that may
	   be required for some devices to work properly, like USB ... */
	/* powersave_nap = 1; */


	/* Setup the ppc_md struct */
	ppc_md.setup_arch	= lite5200_setup_arch;
	ppc_md.show_cpuinfo	= lite5200_show_cpuinfo;
	ppc_md.show_percpuinfo	= NULL;
	ppc_md.init_IRQ		= mpc52xx_init_irq;
	ppc_md.get_irq		= mpc52xx_get_irq;

#ifdef CONFIG_PCI
	ppc_md.pci_map_irq	= lite5200_map_irq;
#endif

	ppc_md.find_end_of_memory = mpc52xx_find_end_of_memory;
	ppc_md.setup_io_mappings  = mpc52xx_map_io;

	ppc_md.restart		= mpc52xx_restart;
	ppc_md.power_off	= mpc52xx_power_off;
	ppc_md.halt		= mpc52xx_halt;

		/* No time keeper on the LITE5200 */
	ppc_md.time_init	= NULL;
	ppc_md.get_rtc_time	= NULL;
	ppc_md.set_rtc_time	= NULL;

	ppc_md.calibrate_decr	= mpc52xx_calibrate_decr;
#ifdef CONFIG_SERIAL_TEXT_DEBUG
	ppc_md.progress		= mpc52xx_progress;
#endif
}