aboutsummaryrefslogtreecommitdiff
path: root/arch/mips/txx9/jmr3927/setup.c
blob: 03647ebe41300a492bb73e1893cb2847b1e34081 (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
/*
 *  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.
 *
 * Copyright 2001 MontaVista Software Inc.
 * Author: MontaVista Software, Inc.
 *              ahennessy@mvista.com
 *
 * Copyright (C) 2000-2001 Toshiba Corporation
 * Copyright (C) 2007 Ralf Baechle (ralf@linux-mips.org)
 */

#include <linux/init.h>
#include <linux/kernel.h>
#include <linux/types.h>
#include <linux/ioport.h>
#include <linux/delay.h>
#include <linux/pm.h>
#include <linux/platform_device.h>
#include <linux/gpio.h>
#ifdef CONFIG_SERIAL_TXX9
#include <linux/serial_core.h>
#endif
#include <asm/txx9tmr.h>
#include <asm/txx9pio.h>
#include <asm/reboot.h>
#include <asm/txx9/generic.h>
#include <asm/txx9/pci.h>
#include <asm/txx9/jmr3927.h>
#include <asm/mipsregs.h>

extern void puts(const char *cp);

/* don't enable - see errata */
static int jmr3927_ccfg_toeon;

static inline void do_reset(void)
{
#if 1	/* Resetting PCI bus */
	jmr3927_ioc_reg_out(0, JMR3927_IOC_RESET_ADDR);
	jmr3927_ioc_reg_out(JMR3927_IOC_RESET_PCI, JMR3927_IOC_RESET_ADDR);
	(void)jmr3927_ioc_reg_in(JMR3927_IOC_RESET_ADDR);	/* flush WB */
	mdelay(1);
	jmr3927_ioc_reg_out(0, JMR3927_IOC_RESET_ADDR);
#endif
	jmr3927_ioc_reg_out(JMR3927_IOC_RESET_CPU, JMR3927_IOC_RESET_ADDR);
}

static void jmr3927_machine_restart(char *command)
{
	local_irq_disable();
	puts("Rebooting...");
	do_reset();
}

static void jmr3927_machine_halt(void)
{
	puts("JMR-TX3927 halted.\n");
	while (1);
}

static void jmr3927_machine_power_off(void)
{
	puts("JMR-TX3927 halted. Please turn off the power.\n");
	while (1);
}

static void __init jmr3927_time_init(void)
{
	txx9_clockevent_init(TX3927_TMR_REG(0),
			     TXX9_IRQ_BASE + JMR3927_IRQ_IRC_TMR(0),
			     JMR3927_IMCLK);
	txx9_clocksource_init(TX3927_TMR_REG(1), JMR3927_IMCLK);
}

#define DO_WRITE_THROUGH
#define DO_ENABLE_CACHE

static void jmr3927_board_init(void);

static void __init jmr3927_mem_setup(void)
{
	char *argptr;

	set_io_port_base(JMR3927_PORT_BASE + JMR3927_PCIIO);

	_machine_restart = jmr3927_machine_restart;
	_machine_halt = jmr3927_machine_halt;
	pm_power_off = jmr3927_machine_power_off;

	/* Reboot on panic */
	panic_timeout = 180;

	/* cache setup */
	{
		unsigned int conf;
#ifdef DO_ENABLE_CACHE
		int mips_ic_disable = 0, mips_dc_disable = 0;
#else
		int mips_ic_disable = 1, mips_dc_disable = 1;
#endif
#ifdef DO_WRITE_THROUGH
		int mips_config_cwfon = 0;
		int mips_config_wbon = 0;
#else
		int mips_config_cwfon = 1;
		int mips_config_wbon = 1;
#endif

		conf = read_c0_conf();
		conf &= ~(TX39_CONF_ICE | TX39_CONF_DCE | TX39_CONF_WBON | TX39_CONF_CWFON);
		conf |= mips_ic_disable ? 0 : TX39_CONF_ICE;
		conf |= mips_dc_disable ? 0 : TX39_CONF_DCE;
		conf |= mips_config_wbon ? TX39_CONF_WBON : 0;
		conf |= mips_config_cwfon ? TX39_CONF_CWFON : 0;

		write_c0_conf(conf);
		write_c0_cache(0);
	}

	/* initialize board */
	jmr3927_board_init();

	argptr = prom_getcmdline();

	if ((argptr = strstr(argptr, "toeon")) != NULL)
		jmr3927_ccfg_toeon = 1;
	argptr = prom_getcmdline();
	if ((argptr = strstr(argptr, "ip=")) == NULL) {
		argptr = prom_getcmdline();
		strcat(argptr, " ip=bootp");
	}

#ifdef CONFIG_SERIAL_TXX9
	{
		extern int early_serial_txx9_setup(struct uart_port *port);
		int i;
		struct uart_port req;
		for(i = 0; i < 2; i++) {
			memset(&req, 0, sizeof(req));
			req.line = i;
			req.iotype = UPIO_MEM;
			req.membase = (unsigned char __iomem *)TX3927_SIO_REG(i);
			req.mapbase = TX3927_SIO_REG(i);
			req.irq = i == 0 ?
				JMR3927_IRQ_IRC_SIO0 : JMR3927_IRQ_IRC_SIO1;
			if (i == 0)
				req.flags |= UPF_BUGGY_UART /*HAVE_CTS_LINE*/;
			req.uartclk = JMR3927_IMCLK;
			early_serial_txx9_setup(&req);
		}
	}
#ifdef CONFIG_SERIAL_TXX9_CONSOLE
	argptr = prom_getcmdline();
	if ((argptr = strstr(argptr, "console=")) == NULL) {
		argptr = prom_getcmdline();
		strcat(argptr, " console=ttyS1,115200");
	}
#endif
#endif
}

static void tx3927_setup(void);

static void __init jmr3927_pci_setup(void)
{
#ifdef CONFIG_PCI
	int extarb = !(tx3927_ccfgptr->ccfg & TX3927_CCFG_PCIXARB);
	struct pci_controller *c;

	c = txx9_alloc_pci_controller(&txx9_primary_pcic,
				      JMR3927_PCIMEM, JMR3927_PCIMEM_SIZE,
				      JMR3927_PCIIO, JMR3927_PCIIO_SIZE);
	register_pci_controller(c);
	if (!extarb) {
		/* Reset PCI Bus */
		jmr3927_ioc_reg_out(0, JMR3927_IOC_RESET_ADDR);
		udelay(100);
		jmr3927_ioc_reg_out(JMR3927_IOC_RESET_PCI,
				    JMR3927_IOC_RESET_ADDR);
		udelay(100);
		jmr3927_ioc_reg_out(0, JMR3927_IOC_RESET_ADDR);
	}
	tx3927_pcic_setup(c, JMR3927_SDRAM_SIZE, extarb);
#endif /* CONFIG_PCI */
}

static void __init jmr3927_board_init(void)
{
	tx3927_setup();
	jmr3927_pci_setup();

	/* SIO0 DTR on */
	jmr3927_ioc_reg_out(0, JMR3927_IOC_DTR_ADDR);

	jmr3927_led_set(0);

	printk("JMR-TX3927 (Rev %d) --- IOC(Rev %d) DIPSW:%d,%d,%d,%d\n",
	       jmr3927_ioc_reg_in(JMR3927_IOC_BREV_ADDR) & JMR3927_REV_MASK,
	       jmr3927_ioc_reg_in(JMR3927_IOC_REV_ADDR) & JMR3927_REV_MASK,
	       jmr3927_dipsw1(), jmr3927_dipsw2(),
	       jmr3927_dipsw3(), jmr3927_dipsw4());
}

static void __init tx3927_setup(void)
{
	int i;

	txx9_cpu_clock = JMR3927_CORECLK;
	txx9_gbus_clock = JMR3927_GBUSCLK;
	/* SDRAMC are configured by PROM */

	/* ROMC */
	tx3927_romcptr->cr[1] = JMR3927_ROMCE1 | 0x00030048;
	tx3927_romcptr->cr[2] = JMR3927_ROMCE2 | 0x000064c8;
	tx3927_romcptr->cr[3] = JMR3927_ROMCE3 | 0x0003f698;
	tx3927_romcptr->cr[5] = JMR3927_ROMCE5 | 0x0000f218;

	/* CCFG */
	/* enable Timeout BusError */
	if (jmr3927_ccfg_toeon)
		tx3927_ccfgptr->ccfg |= TX3927_CCFG_TOE;

	/* clear BusErrorOnWrite flag */
	tx3927_ccfgptr->ccfg &= ~TX3927_CCFG_BEOW;
	/* Disable PCI snoop */
	tx3927_ccfgptr->ccfg &= ~TX3927_CCFG_PSNP;
	/* do reset on watchdog */
	tx3927_ccfgptr->ccfg |= TX3927_CCFG_WR;

#ifdef DO_WRITE_THROUGH
	/* Enable PCI SNOOP - with write through only */
	tx3927_ccfgptr->ccfg |= TX3927_CCFG_PSNP;
#endif

	/* Pin selection */
	tx3927_ccfgptr->pcfg &= ~TX3927_PCFG_SELALL;
	tx3927_ccfgptr->pcfg |=
		TX3927_PCFG_SELSIOC(0) | TX3927_PCFG_SELSIO_ALL |
		(TX3927_PCFG_SELDMA_ALL & ~TX3927_PCFG_SELDMA(1));

	printk("TX3927 -- CRIR:%08lx CCFG:%08lx PCFG:%08lx\n",
	       tx3927_ccfgptr->crir,
	       tx3927_ccfgptr->ccfg, tx3927_ccfgptr->pcfg);

	/* TMR */
	for (i = 0; i < TX3927_NR_TMR; i++)
		txx9_tmr_init(TX3927_TMR_REG(i));

	/* DMA */
	tx3927_dmaptr->mcr = 0;
	for (i = 0; i < ARRAY_SIZE(tx3927_dmaptr->ch); i++) {
		/* reset channel */
		tx3927_dmaptr->ch[i].ccr = TX3927_DMA_CCR_CHRST;
		tx3927_dmaptr->ch[i].ccr = 0;
	}
	/* enable DMA */
#ifdef __BIG_ENDIAN
	tx3927_dmaptr->mcr = TX3927_DMA_MCR_MSTEN;
#else
	tx3927_dmaptr->mcr = TX3927_DMA_MCR_MSTEN | TX3927_DMA_MCR_LE;
#endif

	/* PIO */
	/* PIO[15:12] connected to LEDs */
	__raw_writel(0x0000f000, &tx3927_pioptr->dir);
	__raw_writel(0, &tx3927_pioptr->maskcpu);
	__raw_writel(0, &tx3927_pioptr->maskext);
	txx9_gpio_init(TX3927_PIO_REG, 0, 16);
	gpio_request(11, "dipsw1");
	gpio_request(10, "dipsw2");
	{
		unsigned int conf;

	conf = read_c0_conf();
               if (!(conf & TX39_CONF_ICE))
                       printk("TX3927 I-Cache disabled.\n");
               if (!(conf & TX39_CONF_DCE))
                       printk("TX3927 D-Cache disabled.\n");
               else if (!(conf & TX39_CONF_WBON))
                       printk("TX3927 D-Cache WriteThrough.\n");
               else if (!(conf & TX39_CONF_CWFON))
                       printk("TX3927 D-Cache WriteBack.\n");
               else
                       printk("TX3927 D-Cache WriteBack (CWF) .\n");
	}
}

/* This trick makes rtc-ds1742 driver usable as is. */
static unsigned long jmr3927_swizzle_addr_b(unsigned long port)
{
	if ((port & 0xffff0000) != JMR3927_IOC_NVRAMB_ADDR)
		return port;
	port = (port & 0xffff0000) | (port & 0x7fff << 1);
#ifdef __BIG_ENDIAN
	return port;
#else
	return port | 1;
#endif
}

static int __init jmr3927_rtc_init(void)
{
	static struct resource __initdata res = {
		.start	= JMR3927_IOC_NVRAMB_ADDR - IO_BASE,
		.end	= JMR3927_IOC_NVRAMB_ADDR - IO_BASE + 0x800 - 1,
		.flags	= IORESOURCE_MEM,
	};
	struct platform_device *dev;
	dev = platform_device_register_simple("rtc-ds1742", -1, &res, 1);
	return IS_ERR(dev) ? PTR_ERR(dev) : 0;
}

/* Watchdog support */

static int __init txx9_wdt_init(unsigned long base)
{
	struct resource res = {
		.start	= base,
		.end	= base + 0x100 - 1,
		.flags	= IORESOURCE_MEM,
	};
	struct platform_device *dev =
		platform_device_register_simple("txx9wdt", -1, &res, 1);
	return IS_ERR(dev) ? PTR_ERR(dev) : 0;
}

static int __init jmr3927_wdt_init(void)
{
	return txx9_wdt_init(TX3927_TMR_REG(2));
}

static void __init jmr3927_device_init(void)
{
	__swizzle_addr_b = jmr3927_swizzle_addr_b;
	jmr3927_rtc_init();
	jmr3927_wdt_init();
}

struct txx9_board_vec jmr3927_vec __initdata = {
	.system = "Toshiba JMR_TX3927",
	.prom_init = jmr3927_prom_init,
	.mem_setup = jmr3927_mem_setup,
	.irq_setup = jmr3927_irq_setup,
	.time_init = jmr3927_time_init,
	.device_init = jmr3927_device_init,
#ifdef CONFIG_PCI
	.pci_map_irq = jmr3927_pci_map_irq,
#endif
};