summaryrefslogtreecommitdiffstats
path: root/board/eNET/eNET.c
blob: dd0ce545163ae33c7fea51009a4b9eae370cefa3 (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
/*
 * (C) Copyright 2008
 * Graeme Russ, graeme.russ@gmail.com.
 *
 * See file CREDITS for list of people who contributed to this
 * project.
 *
 * 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 program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.	 See the
 * GNU General Public License for more details.
 *
 * 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., 59 Temple Place, Suite 330, Boston,
 * MA 02111-1307 USA
 */

#include <common.h>
#include <asm/io.h>
#include <asm/ic/sc520.h>
#include <net.h>
#include <netdev.h>

#ifdef CONFIG_HW_WATCHDOG
#include <watchdog.h>
#endif

#include "hardware.h"

DECLARE_GLOBAL_DATA_PTR;

static void enet_timer_isr(void);
static void enet_toggle_run_led(void);
static void enet_setup_pars(void);

/*
 * Miscellaneous platform dependent initializations
 */
int board_early_init_f(void)
{
	u16 pio_out_cfg = 0x0000;

	/* Configure General Purpose Bus timing */
	writeb(CONFIG_SYS_SC520_GPCSRT, &sc520_mmcr->gpcsrt);
	writeb(CONFIG_SYS_SC520_GPCSPW, &sc520_mmcr->gpcspw);
	writeb(CONFIG_SYS_SC520_GPCSOFF, &sc520_mmcr->gpcsoff);
	writeb(CONFIG_SYS_SC520_GPRDW, &sc520_mmcr->gprdw);
	writeb(CONFIG_SYS_SC520_GPRDOFF, &sc520_mmcr->gprdoff);
	writeb(CONFIG_SYS_SC520_GPWRW, &sc520_mmcr->gpwrw);
	writeb(CONFIG_SYS_SC520_GPWROFF, &sc520_mmcr->gpwroff);

	/* Configure Programmable Input/Output Pins */
	writew(CONFIG_SYS_SC520_PIODIR15_0, &sc520_mmcr->piodir15_0);
	writew(CONFIG_SYS_SC520_PIODIR31_16, &sc520_mmcr->piodir31_16);
	writew(CONFIG_SYS_SC520_PIOPFS31_16, &sc520_mmcr->piopfs31_16);
	writew(CONFIG_SYS_SC520_PIOPFS15_0, &sc520_mmcr->piopfs15_0);
	writeb(CONFIG_SYS_SC520_CSPFS, &sc520_mmcr->cspfs);
	writeb(CONFIG_SYS_SC520_CLKSEL, &sc520_mmcr->clksel);

	/*
	 * Turn off top board
	 * Set StrataFlash chips to 16-bit width
	 * Set StrataFlash chips to normal (non reset/power down) mode
	 */
	pio_out_cfg |= CONFIG_SYS_ENET_TOP_BRD_PWR;
	pio_out_cfg |= CONFIG_SYS_ENET_SF_WIDTH;
	pio_out_cfg |= CONFIG_SYS_ENET_SF1_MODE;
	pio_out_cfg |= CONFIG_SYS_ENET_SF2_MODE;
	writew(pio_out_cfg, &sc520_mmcr->pioset15_0);

	/* Turn off auxiliary power output */
	writew(CONFIG_SYS_ENET_AUX_PWR, &sc520_mmcr->pioclr15_0);

	/* Clear FPGA program mode */
	writew(CONFIG_SYS_ENET_FPGA_PROG, &sc520_mmcr->pioset31_16);

	enet_setup_pars();

	/* Disable Watchdog */
	writew(0x3333, &sc520_mmcr->wdtmrctl);
	writew(0xcccc, &sc520_mmcr->wdtmrctl);
	writew(0x0000, &sc520_mmcr->wdtmrctl);

	/* Chip Select Configuration */
	writew(CONFIG_SYS_SC520_BOOTCS_CTRL, &sc520_mmcr->bootcsctl);
	writew(CONFIG_SYS_SC520_ROMCS1_CTRL, &sc520_mmcr->romcs1ctl);
	writew(CONFIG_SYS_SC520_ROMCS2_CTRL, &sc520_mmcr->romcs2ctl);

	writeb(CONFIG_SYS_SC520_ADDDECCTL, &sc520_mmcr->adddecctl);
	writeb(CONFIG_SYS_SC520_UART1CTL, &sc520_mmcr->uart1ctl);
	writeb(CONFIG_SYS_SC520_UART2CTL, &sc520_mmcr->uart2ctl);

	writeb(CONFIG_SYS_SC520_SYSARBCTL, &sc520_mmcr->sysarbctl);
	writew(CONFIG_SYS_SC520_SYSARBMENB, &sc520_mmcr->sysarbmenb);

	/* enable posted-writes */
	writeb(CONFIG_SYS_SC520_HBCTL, &sc520_mmcr->hbctl);

	return 0;
}

static void enet_setup_pars(void)
{
	/*
	 * PARs 11 and 12 are 2MB SRAM @ 0x19000000
	 *
	 * These are setup now because older version of U-Boot have them
	 * mapped to a different PAR which gets clobbered which prevents
	 * using SRAM for warm-booting a new image
	 */
	writel(CONFIG_SYS_SC520_SRAM1_PAR, &sc520_mmcr->par[11]);
	writel(CONFIG_SYS_SC520_SRAM2_PAR, &sc520_mmcr->par[12]);

	/* PARs 0 and 1 are Compact Flash slots (4kB each) */
	writel(CONFIG_SYS_SC520_CF1_PAR, &sc520_mmcr->par[0]);
	writel(CONFIG_SYS_SC520_CF2_PAR, &sc520_mmcr->par[1]);

	/* PAR 2 is used for Cache-As-RAM */

	/*
	 * PARs 5 through 8 are additional NS16550 UARTS
	 * 8 bytes each @ 0x013f8, 0x012f8, 0x011f8 and 0x010f8
	 */
	writel(CONFIG_SYS_SC520_UARTA_PAR, &sc520_mmcr->par[5]);
	writel(CONFIG_SYS_SC520_UARTB_PAR, &sc520_mmcr->par[6]);
	writel(CONFIG_SYS_SC520_UARTC_PAR, &sc520_mmcr->par[7]);
	writel(CONFIG_SYS_SC520_UARTD_PAR, &sc520_mmcr->par[8]);

	/* PARs 9 and 10 are 32MB StrataFlash @ 0x10000000 */
	writel(CONFIG_SYS_SC520_SF1_PAR, &sc520_mmcr->par[9]);
	writel(CONFIG_SYS_SC520_SF2_PAR, &sc520_mmcr->par[10]);

	/* PAR 13 is 4kB DPRAM @ 0x18100000 (implemented in FPGA) */
	writel(CONFIG_SYS_SC520_DPRAM_PAR, &sc520_mmcr->par[13]);

	/*
	 * PAR 14 is Low Level I/O (LEDs, Hex Switches etc)
	 * Already configured in board_init16 (eNET_start16.S)
	 *
	 * PAR 15 is Boot ROM
	 * Already configured in board_init16 (eNET_start16.S)
	 */
}


int board_early_init_r(void)
{
	/* CPU Speed to 100MHz */
	gd->cpu_clk = 100000000;

	/* Crystal is 33.000MHz */
	gd->bus_clk = 33000000;

	return 0;
}

void show_boot_progress(int val)
{
	uchar led_mask;

	led_mask = 0x00;

	if (val < 0)
		led_mask |= LED_ERR_BITMASK;

	led_mask |= (uchar)(val & 0x001f);
	outb(led_mask, LED_LATCH_ADDRESS);
}


int last_stage_init(void)
{
	int minor;
	int major;

	major = minor = 0;

	outb(0x00, LED_LATCH_ADDRESS);

	register_timer_isr(enet_timer_isr);

	printf("Serck Controls eNET\n");

	return 0;
}

ulong board_flash_get_legacy(ulong base, int banknum, flash_info_t *info)
{
	if (banknum == 0) {	/* non-CFI boot flash */
		info->portwidth = FLASH_CFI_8BIT;
		info->chipwidth = FLASH_CFI_BY8;
		info->interface = FLASH_CFI_X8;
		return 1;
	} else {
		return 0;
	}
}

int board_eth_init(bd_t *bis)
{
	return pci_eth_init(bis);
}

void setup_pcat_compatibility()
{
	/* disable global interrupt mode */
	writeb(0x40, &sc520_mmcr->picicr);

	/* set all irqs to edge */
	writeb(0x00, &sc520_mmcr->pic_mode[0]);
	writeb(0x00, &sc520_mmcr->pic_mode[1]);
	writeb(0x00, &sc520_mmcr->pic_mode[2]);

	/*
	 *  active low polarity on PIC interrupt pins,
	 *  active high polarity on all other irq pins
	 */
	writew(0x0000,&sc520_mmcr->intpinpol);

	/*
	 * PIT 0 -> IRQ0
	 * RTC -> IRQ8
	 * FP error -> IRQ13
	 * UART1 -> IRQ4
	 * UART2 -> IRQ3
	 */
	writeb(SC520_IRQ0, &sc520_mmcr->pit_int_map[0]);
	writeb(SC520_IRQ8, &sc520_mmcr->rtcmap);
	writeb(SC520_IRQ13, &sc520_mmcr->ferrmap);
	writeb(SC520_IRQ4, &sc520_mmcr->uart_int_map[0]);
	writeb(SC520_IRQ3, &sc520_mmcr->uart_int_map[1]);

	/* Disable all other interrupt sources */
	writeb(SC520_IRQ_DISABLED, &sc520_mmcr->gp_tmr_int_map[0]);
	writeb(SC520_IRQ_DISABLED, &sc520_mmcr->gp_tmr_int_map[1]);
	writeb(SC520_IRQ_DISABLED, &sc520_mmcr->gp_tmr_int_map[2]);
	writeb(SC520_IRQ_DISABLED, &sc520_mmcr->pit_int_map[1]);
	writeb(SC520_IRQ_DISABLED, &sc520_mmcr->pit_int_map[2]);
	writeb(SC520_IRQ_DISABLED, &sc520_mmcr->ssimap);
	writeb(SC520_IRQ_DISABLED, &sc520_mmcr->wdtmap);
	writeb(SC520_IRQ_DISABLED, &sc520_mmcr->wpvmap);
	writeb(SC520_IRQ_DISABLED, &sc520_mmcr->icemap);
}

void enet_timer_isr(void)
{
	static long enet_ticks = 0;

	enet_ticks++;

	/* Toggle Watchdog every 100ms */
	if ((enet_ticks % 100) == 0)
		hw_watchdog_reset();

	/* Toggle Run LED every 500ms */
	if ((enet_ticks % 500) == 0)
		enet_toggle_run_led();
}

void hw_watchdog_reset(void)
{
	/* Watchdog Reset must be atomic */
	long flag = disable_interrupts();

	if (sc520_mmcr->piodata15_0 & WATCHDOG_PIO_BIT)
		sc520_mmcr->pioclr15_0 = WATCHDOG_PIO_BIT;
	else
		sc520_mmcr->pioset15_0 = WATCHDOG_PIO_BIT;

	if (flag)
		enable_interrupts();
}

void enet_toggle_run_led(void)
{
	unsigned char leds_state= inb(LED_LATCH_ADDRESS);
	if (leds_state & LED_RUN_BITMASK)
		outb(leds_state &~ LED_RUN_BITMASK, LED_LATCH_ADDRESS);
	else
		outb(leds_state | LED_RUN_BITMASK, LED_LATCH_ADDRESS);
}