summaryrefslogtreecommitdiff
path: root/arch/mips/momentum/ocelot_3/setup.c
blob: a7803e08f9db6cad3fcdb2e62bd60e8d7d51e8ce (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
/*
 * setup.c
 *
 * BRIEF MODULE DESCRIPTION
 * Momentum Computer Ocelot-3 board dependent boot routines
 *
 * Copyright (C) 1996, 1997, 01, 05  Ralf Baechle
 * Copyright (C) 2000 RidgeRun, Inc.
 * Copyright (C) 2001 Red Hat, Inc.
 * Copyright (C) 2002 Momentum Computer
 *
 * Author: Matthew Dharm, Momentum Computer
 *   mdharm@momenco.com
 *
 * Louis Hamilton, Red Hat, Inc.
 *   hamilton@redhat.com  [MIPS64 modifications]
 *
 * Author: RidgeRun, Inc.
 *   glonnon@ridgerun.com, skranz@ridgerun.com, stevej@ridgerun.com
 *
 * Copyright 2001 MontaVista Software Inc.
 * Author: jsun@mvista.com or jsun@junsun.net
 *
 * Copyright 2004 PMC-Sierra
 * Author: Manish Lachwani (lachwani@pmc-sierra.com)
 *
 * Copyright (C) 2004 MontaVista Software Inc.
 * Author: Manish Lachwani, mlachwani@mvista.com
 *
 *  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/init.h>
#include <linux/kernel.h>
#include <linux/types.h>
#include <linux/mc146818rtc.h>
#include <linux/ioport.h>
#include <linux/interrupt.h>
#include <linux/pci.h>
#include <linux/timex.h>
#include <linux/bootmem.h>
#include <linux/mv643xx.h>
#include <asm/time.h>
#include <asm/page.h>
#include <asm/bootinfo.h>
#include <asm/io.h>
#include <asm/irq.h>
#include <asm/pci.h>
#include <asm/processor.h>
#include <asm/ptrace.h>
#include <asm/reboot.h>
#include <asm/mc146818rtc.h>
#include <asm/tlbflush.h>
#include "ocelot_3_fpga.h"

/* Marvell Discovery Register Base */
unsigned long marvell_base = (signed)0xf4000000;

/* CPU clock */
unsigned long cpu_clock;

/* RTC/NVRAM */
unsigned char* rtc_base = (unsigned char*)(signed)0xfc800000;

/* FPGA Base */
unsigned long ocelot_fpga_base = (signed)0xfc000000;

/* Serial base */
unsigned long uart_base = (signed)0xfd000000;

/*
 * Marvell Discovery SRAM. This is one place where Ethernet
 * Tx and Rx descriptors can be placed to improve performance
 */
extern unsigned long mv64340_sram_base;

/* These functions are used for rebooting or halting the machine*/
extern void momenco_ocelot_restart(char *command);
extern void momenco_ocelot_halt(void);
extern void momenco_ocelot_power_off(void);

void momenco_time_init(void);
static char reset_reason;

void add_wired_entry(unsigned long entrylo0, unsigned long entrylo1,
		     unsigned long entryhi, unsigned long pagemask);

static inline unsigned long ENTRYLO(unsigned long paddr)
{
	return ((paddr & PAGE_MASK) |
		(_PAGE_PRESENT | __READABLE | __WRITEABLE | _PAGE_GLOBAL |
		_CACHE_UNCACHED)) >> 6;
}

void __init bus_error_init(void)
{
	/* nothing */
}

/*
 * setup code for a handoff from a version 2 PMON 2000 PROM
 */
void setup_wired_tlb_entries(void)
{
	write_c0_wired(0);
	local_flush_tlb_all();

	/* marvell and extra space */
	add_wired_entry(ENTRYLO(0xf4000000), ENTRYLO(0xf4010000), (signed)0xf4000000, PM_64K);

	/* fpga, rtc, and uart */
	add_wired_entry(ENTRYLO(0xfc000000), ENTRYLO(0xfd000000), (signed)0xfc000000, PM_16M);
}

#define CONV_BCD_TO_BIN(val)	(((val) & 0xf) + (((val) >> 4) * 10))
#define CONV_BIN_TO_BCD(val)	(((val) % 10) + (((val) / 10) << 4))

unsigned long m48t37y_get_time(void)
{
	unsigned int year, month, day, hour, min, sec;

	/* stop the update */
	rtc_base[0x7ff8] = 0x40;

	year = CONV_BCD_TO_BIN(rtc_base[0x7fff]);
	year += CONV_BCD_TO_BIN(rtc_base[0x7ff1]) * 100;

	month = CONV_BCD_TO_BIN(rtc_base[0x7ffe]);

	day = CONV_BCD_TO_BIN(rtc_base[0x7ffd]);

	hour = CONV_BCD_TO_BIN(rtc_base[0x7ffb]);
	min = CONV_BCD_TO_BIN(rtc_base[0x7ffa]);
	sec = CONV_BCD_TO_BIN(rtc_base[0x7ff9]);

	/* start the update */
	rtc_base[0x7ff8] = 0x00;

	return mktime(year, month, day, hour, min, sec);
}

int m48t37y_set_time(unsigned long sec)
{
	struct rtc_time tm;

	/* convert to a more useful format -- note months count from 0 */
	to_tm(sec, &tm);
	tm.tm_mon += 1;

	/* enable writing */
	rtc_base[0x7ff8] = 0x80;

	/* year */
	rtc_base[0x7fff] = CONV_BIN_TO_BCD(tm.tm_year % 100);
	rtc_base[0x7ff1] = CONV_BIN_TO_BCD(tm.tm_year / 100);

	/* month */
	rtc_base[0x7ffe] = CONV_BIN_TO_BCD(tm.tm_mon);

	/* day */
	rtc_base[0x7ffd] = CONV_BIN_TO_BCD(tm.tm_mday);

	/* hour/min/sec */
	rtc_base[0x7ffb] = CONV_BIN_TO_BCD(tm.tm_hour);
	rtc_base[0x7ffa] = CONV_BIN_TO_BCD(tm.tm_min);
	rtc_base[0x7ff9] = CONV_BIN_TO_BCD(tm.tm_sec);

	/* day of week -- not really used, but let's keep it up-to-date */
	rtc_base[0x7ffc] = CONV_BIN_TO_BCD(tm.tm_wday + 1);

	/* disable writing */
	rtc_base[0x7ff8] = 0x00;

	return 0;
}

void momenco_timer_setup(struct irqaction *irq)
{
	setup_irq(7, irq);	/* Timer interrupt, unmask status IM7 */
}

void momenco_time_init(void)
{
	setup_wired_tlb_entries();

	/*
	 * Ocelot-3 board has been built with both
	 * the Rm7900 and the Rm7065C
	 */
	mips_hpt_frequency = cpu_clock / 2;
	board_timer_setup = momenco_timer_setup;

	rtc_get_time = m48t37y_get_time;
	rtc_set_time = m48t37y_set_time;
}

/*
 * PCI Support for Ocelot-3
 */

/* Bus #0 IO and MEM space */
#define	OCELOT_3_PCI_IO_0_START		0xe0000000
#define	OCELOT_3_PCI_IO_0_SIZE		0x08000000
#define	OCELOT_3_PCI_MEM_0_START	0xc0000000
#define	OCELOT_3_PCI_MEM_0_SIZE		0x10000000

/* Bus #1 IO and MEM space */
#define	OCELOT_3_PCI_IO_1_START		0xe8000000
#define	OCELOT_3_PCI_IO_1_SIZE		0x08000000
#define	OCELOT_3_PCI_MEM_1_START	0xd0000000
#define	OCELOT_3_PCI_MEM_1_SIZE		0x10000000

static struct resource mv_pci_io_mem0_resource = {
	.name	= "MV64340 PCI0 IO MEM",
	.start	= OCELOT_3_PCI_IO_0_START,
	.end	= OCELOT_3_PCI_IO_0_START + OCELOT_3_PCI_IO_0_SIZE - 1,
	.flags  = IORESOURCE_IO,
};

static struct resource mv_pci_io_mem1_resource = {
	.name	= "MV64340 PCI1 IO MEM",
	.start	= OCELOT_3_PCI_IO_1_START,
	.end	= OCELOT_3_PCI_IO_1_START + OCELOT_3_PCI_IO_1_SIZE - 1,
	.flags	= IORESOURCE_IO,
};

static struct resource mv_pci_mem0_resource = {
	.name	= "MV64340 PCI0 MEM",
	.start	= OCELOT_3_PCI_MEM_0_START,
	.end	= OCELOT_3_PCI_MEM_0_START + OCELOT_3_PCI_MEM_0_SIZE - 1,
	.flags	= IORESOURCE_MEM,
};

static struct resource mv_pci_mem1_resource = {
	.name	= "MV64340 PCI1 MEM",
	.start	= OCELOT_3_PCI_MEM_1_START,
	.end	= OCELOT_3_PCI_MEM_1_START + OCELOT_3_PCI_MEM_1_SIZE - 1,
	.flags	= IORESOURCE_MEM,
};

static struct mv_pci_controller mv_bus0_controller = {
	.pcic = {
		 .pci_ops	= &mv_pci_ops,
		 .mem_resource	= &mv_pci_mem0_resource,
		 .io_resource	= &mv_pci_io_mem0_resource,
	},
	.config_addr	= MV64340_PCI_0_CONFIG_ADDR,
	.config_vreg	= MV64340_PCI_0_CONFIG_DATA_VIRTUAL_REG,
};

static struct mv_pci_controller mv_bus1_controller = {
	.pcic = {
		 .pci_ops	= &mv_pci_ops,
		 .mem_resource	= &mv_pci_mem1_resource,
		 .io_resource	= &mv_pci_io_mem1_resource,
	},
	.config_addr	= MV64340_PCI_1_CONFIG_ADDR,
	.config_vreg	= MV64340_PCI_1_CONFIG_DATA_VIRTUAL_REG,
};

static __init int __init ja_pci_init(void)
{
	uint32_t enable;
	extern int pci_probe_only;

	/* PMON will assign PCI resources */
	pci_probe_only = 1;

	enable = ~MV_READ(MV64340_BASE_ADDR_ENABLE);
	/*
	 * We require at least one enabled I/O or PCI memory window or we
	 * will ignore this PCI bus.  We ignore PCI windows 1, 2 and 3.
	 */
	if (enable & (0x01 <<  9) || enable & (0x01 << 10))
		register_pci_controller(&mv_bus0_controller.pcic);

	if (enable & (0x01 << 14) || enable & (0x01 << 15))
		register_pci_controller(&mv_bus1_controller.pcic);

	ioport_resource.end = OCELOT_3_PCI_IO_0_START + OCELOT_3_PCI_IO_0_SIZE +
					OCELOT_3_PCI_IO_1_SIZE - 1;

	iomem_resource.end = OCELOT_3_PCI_MEM_0_START + OCELOT_3_PCI_MEM_0_SIZE +
					OCELOT_3_PCI_MEM_1_SIZE - 1;

	set_io_port_base(OCELOT_3_PCI_IO_0_START); /* mips_io_port_base */

	return 0;
}

arch_initcall(ja_pci_init);

void __init plat_setup(void)
{
	unsigned int tmpword;

	board_time_init = momenco_time_init;

	_machine_restart = momenco_ocelot_restart;
	_machine_halt = momenco_ocelot_halt;
	_machine_power_off = momenco_ocelot_power_off;

	/* Wired TLB entries */
	setup_wired_tlb_entries();

	/* shut down ethernet ports, just to be sure our memory doesn't get
	 * corrupted by random ethernet traffic.
	 */
	MV_WRITE(MV64340_ETH_TRANSMIT_QUEUE_COMMAND_REG(0), 0xff << 8);
	MV_WRITE(MV64340_ETH_TRANSMIT_QUEUE_COMMAND_REG(1), 0xff << 8);
	MV_WRITE(MV64340_ETH_RECEIVE_QUEUE_COMMAND_REG(0), 0xff << 8);
	MV_WRITE(MV64340_ETH_RECEIVE_QUEUE_COMMAND_REG(1), 0xff << 8);
	do {}
	  while (MV_READ(MV64340_ETH_RECEIVE_QUEUE_COMMAND_REG(0)) & 0xff);
	do {}
	  while (MV_READ(MV64340_ETH_RECEIVE_QUEUE_COMMAND_REG(1)) & 0xff);
	do {}
	  while (MV_READ(MV64340_ETH_TRANSMIT_QUEUE_COMMAND_REG(0)) & 0xff);
	do {}
	  while (MV_READ(MV64340_ETH_TRANSMIT_QUEUE_COMMAND_REG(1)) & 0xff);
	MV_WRITE(MV64340_ETH_PORT_SERIAL_CONTROL_REG(0),
		 MV_READ(MV64340_ETH_PORT_SERIAL_CONTROL_REG(0)) & ~1);
	MV_WRITE(MV64340_ETH_PORT_SERIAL_CONTROL_REG(1),
		 MV_READ(MV64340_ETH_PORT_SERIAL_CONTROL_REG(1)) & ~1);

	/* Turn off the Bit-Error LED */
	OCELOT_FPGA_WRITE(0x80, CLR);

	tmpword = OCELOT_FPGA_READ(BOARDREV);
	if (tmpword < 26)
		printk("Momenco Ocelot-3: Board Assembly Rev. %c\n",
			'A'+tmpword);
	else
		printk("Momenco Ocelot-3: Board Assembly Revision #0x%x\n",
			tmpword);

	tmpword = OCELOT_FPGA_READ(FPGA_REV);
	printk("FPGA Rev: %d.%d\n", tmpword>>4, tmpword&15);
	tmpword = OCELOT_FPGA_READ(RESET_STATUS);
	printk("Reset reason: 0x%x\n", tmpword);
	switch (tmpword) {
		case 0x1:
			printk("  - Power-up reset\n");
			break;
		case 0x2:
			printk("  - Push-button reset\n");
			break;
		case 0x4:
			printk("  - cPCI bus reset\n");
			break;
		case 0x8:
			printk("  - Watchdog reset\n");
			break;
		case 0x10:
			printk("  - Software reset\n");
			break;
		default:
			printk("  - Unknown reset cause\n");
	}
	reset_reason = tmpword;
	OCELOT_FPGA_WRITE(0xff, RESET_STATUS);

	tmpword = OCELOT_FPGA_READ(CPCI_ID);
	printk("cPCI ID register: 0x%02x\n", tmpword);
	printk("  - Slot number: %d\n", tmpword & 0x1f);
	printk("  - PCI bus present: %s\n", tmpword & 0x40 ? "yes" : "no");
	printk("  - System Slot: %s\n", tmpword & 0x20 ? "yes" : "no");

	tmpword = OCELOT_FPGA_READ(BOARD_STATUS);
	printk("Board Status register: 0x%02x\n", tmpword);
	printk("  - User jumper: %s\n", (tmpword & 0x80)?"installed":"absent");
	printk("  - Boot flash write jumper: %s\n", (tmpword&0x40)?"installed":"absent");
	printk("  - L3 cache size: %d MB\n", (1<<((tmpword&12) >> 2))&~1);

	/* Support for 128 MB memory */
	add_memory_region(0x0, 0x08000000, BOOT_MEM_RAM);
}