summaryrefslogtreecommitdiffstats
path: root/arch/m68k/platform/527x/config.c
blob: 018ac69ef24296a90edfb3801c90ecc33c0f8f35 (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
/***************************************************************************/

/*
 *	linux/arch/m68knommu/platform/527x/config.c
 *
 *	Sub-architcture dependent initialization code for the Freescale
 *	5270/5271 CPUs.
 *
 *	Copyright (C) 1999-2004, Greg Ungerer (gerg@snapgear.com)
 *	Copyright (C) 2001-2004, SnapGear Inc. (www.snapgear.com)
 */

/***************************************************************************/

#include <linux/kernel.h>
#include <linux/param.h>
#include <linux/init.h>
#include <linux/io.h>
#include <linux/spi/spi.h>
#include <linux/gpio.h>
#include <asm/machdep.h>
#include <asm/coldfire.h>
#include <asm/mcfsim.h>
#include <asm/mcfuart.h>
#include <asm/mcfqspi.h>

/***************************************************************************/

#if defined(CONFIG_SPI_COLDFIRE_QSPI) || defined(CONFIG_SPI_COLDFIRE_QSPI_MODULE)
static struct resource m527x_qspi_resources[] = {
	{
		.start		= MCFQSPI_IOBASE,
		.end		= MCFQSPI_IOBASE + MCFQSPI_IOSIZE - 1,
		.flags		= IORESOURCE_MEM,
	},
	{
		.start		= MCFINT_VECBASE + MCFINT_QSPI,
		.end		= MCFINT_VECBASE + MCFINT_QSPI,
		.flags		= IORESOURCE_IRQ,
	},
};

#if defined(CONFIG_M5271)
#define MCFQSPI_CS0    91
#define MCFQSPI_CS1    92
#define MCFQSPI_CS2    99
#define MCFQSPI_CS3    103
#elif defined(CONFIG_M5275)
#define MCFQSPI_CS0    59
#define MCFQSPI_CS1    60
#define MCFQSPI_CS2    61
#define MCFQSPI_CS3    62
#endif

static int m527x_cs_setup(struct mcfqspi_cs_control *cs_control)
{
	int status;

	status = gpio_request(MCFQSPI_CS0, "MCFQSPI_CS0");
	if (status) {
		pr_debug("gpio_request for MCFQSPI_CS0 failed\n");
		goto fail0;
	}
	status = gpio_direction_output(MCFQSPI_CS0, 1);
	if (status) {
		pr_debug("gpio_direction_output for MCFQSPI_CS0 failed\n");
		goto fail1;
	}

	status = gpio_request(MCFQSPI_CS1, "MCFQSPI_CS1");
	if (status) {
		pr_debug("gpio_request for MCFQSPI_CS1 failed\n");
		goto fail1;
	}
	status = gpio_direction_output(MCFQSPI_CS1, 1);
	if (status) {
		pr_debug("gpio_direction_output for MCFQSPI_CS1 failed\n");
		goto fail2;
	}

	status = gpio_request(MCFQSPI_CS2, "MCFQSPI_CS2");
	if (status) {
		pr_debug("gpio_request for MCFQSPI_CS2 failed\n");
		goto fail2;
	}
	status = gpio_direction_output(MCFQSPI_CS2, 1);
	if (status) {
		pr_debug("gpio_direction_output for MCFQSPI_CS2 failed\n");
		goto fail3;
	}

	status = gpio_request(MCFQSPI_CS3, "MCFQSPI_CS3");
	if (status) {
		pr_debug("gpio_request for MCFQSPI_CS3 failed\n");
		goto fail3;
	}
	status = gpio_direction_output(MCFQSPI_CS3, 1);
	if (status) {
		pr_debug("gpio_direction_output for MCFQSPI_CS3 failed\n");
		goto fail4;
	}

	return 0;

fail4:
	gpio_free(MCFQSPI_CS3);
fail3:
	gpio_free(MCFQSPI_CS2);
fail2:
	gpio_free(MCFQSPI_CS1);
fail1:
	gpio_free(MCFQSPI_CS0);
fail0:
	return status;
}

static void m527x_cs_teardown(struct mcfqspi_cs_control *cs_control)
{
	gpio_free(MCFQSPI_CS3);
	gpio_free(MCFQSPI_CS2);
	gpio_free(MCFQSPI_CS1);
	gpio_free(MCFQSPI_CS0);
}

static void m527x_cs_select(struct mcfqspi_cs_control *cs_control,
			    u8 chip_select, bool cs_high)
{
	switch (chip_select) {
	case 0:
		gpio_set_value(MCFQSPI_CS0, cs_high);
		break;
	case 1:
		gpio_set_value(MCFQSPI_CS1, cs_high);
		break;
	case 2:
		gpio_set_value(MCFQSPI_CS2, cs_high);
		break;
	case 3:
		gpio_set_value(MCFQSPI_CS3, cs_high);
		break;
	}
}

static void m527x_cs_deselect(struct mcfqspi_cs_control *cs_control,
			      u8 chip_select, bool cs_high)
{
	switch (chip_select) {
	case 0:
		gpio_set_value(MCFQSPI_CS0, !cs_high);
		break;
	case 1:
		gpio_set_value(MCFQSPI_CS1, !cs_high);
		break;
	case 2:
		gpio_set_value(MCFQSPI_CS2, !cs_high);
		break;
	case 3:
		gpio_set_value(MCFQSPI_CS3, !cs_high);
		break;
	}
}

static struct mcfqspi_cs_control m527x_cs_control = {
	.setup                  = m527x_cs_setup,
	.teardown               = m527x_cs_teardown,
	.select                 = m527x_cs_select,
	.deselect               = m527x_cs_deselect,
};

static struct mcfqspi_platform_data m527x_qspi_data = {
	.bus_num		= 0,
	.num_chipselect		= 4,
	.cs_control		= &m527x_cs_control,
};

static struct platform_device m527x_qspi = {
	.name			= "mcfqspi",
	.id			= 0,
	.num_resources		= ARRAY_SIZE(m527x_qspi_resources),
	.resource		= m527x_qspi_resources,
	.dev.platform_data	= &m527x_qspi_data,
};

static void __init m527x_qspi_init(void)
{
#if defined(CONFIG_M5271)
	u16 par;

	/* setup QSPS pins for QSPI with gpio CS control */
	writeb(0x1f, MCFGPIO_PAR_QSPI);
	/* and CS2 & CS3 as gpio */
	par = readw(MCFGPIO_PAR_TIMER);
	par &= 0x3f3f;
	writew(par, MCFGPIO_PAR_TIMER);
#elif defined(CONFIG_M5275)
	/* setup QSPS pins for QSPI with gpio CS control */
	writew(0x003e, MCFGPIO_PAR_QSPI);
#endif
}
#endif /* defined(CONFIG_SPI_COLDFIRE_QSPI) || defined(CONFIG_SPI_COLDFIRE_QSPI_MODULE) */

static struct platform_device *m527x_devices[] __initdata = {
#if defined(CONFIG_SPI_COLDFIRE_QSPI) || defined(CONFIG_SPI_COLDFIRE_QSPI_MODULE)
	&m527x_qspi,
#endif
};

/***************************************************************************/

static void __init m527x_uarts_init(void)
{
	u16 sepmask;

	/*
	 * External Pin Mask Setting & Enable External Pin for Interface
	 */
	sepmask = readw(MCF_IPSBAR + MCF_GPIO_PAR_UART);
	sepmask |= UART0_ENABLE_MASK | UART1_ENABLE_MASK | UART2_ENABLE_MASK;
	writew(sepmask, MCF_IPSBAR + MCF_GPIO_PAR_UART);
}

/***************************************************************************/

static void __init m527x_fec_init(void)
{
	u16 par;
	u8 v;

	/* Set multi-function pins to ethernet mode for fec0 */
#if defined(CONFIG_M5271)
	v = readb(MCF_IPSBAR + 0x100047);
	writeb(v | 0xf0, MCF_IPSBAR + 0x100047);
#else
	par = readw(MCF_IPSBAR + 0x100082);
	writew(par | 0xf00, MCF_IPSBAR + 0x100082);
	v = readb(MCF_IPSBAR + 0x100078);
	writeb(v | 0xc0, MCF_IPSBAR + 0x100078);
#endif

#ifdef CONFIG_FEC2
	/* Set multi-function pins to ethernet mode for fec1 */
	par = readw(MCF_IPSBAR + 0x100082);
	writew(par | 0xa0, MCF_IPSBAR + 0x100082);
	v = readb(MCF_IPSBAR + 0x100079);
	writeb(v | 0xc0, MCF_IPSBAR + 0x100079);
#endif
}

/***************************************************************************/

static void m527x_cpu_reset(void)
{
	local_irq_disable();
	__raw_writeb(MCF_RCR_SWRESET, MCF_IPSBAR + MCF_RCR);
}

/***************************************************************************/

void __init config_BSP(char *commandp, int size)
{
	mach_reset = m527x_cpu_reset;
	mach_sched_init = hw_timer_init;
	m527x_uarts_init();
	m527x_fec_init();
#if defined(CONFIG_SPI_COLDFIRE_QSPI) || defined(CONFIG_SPI_COLDFIRE_QSPI_MODULE)
	m527x_qspi_init();
#endif
}

/***************************************************************************/

static int __init init_BSP(void)
{
	platform_add_devices(m527x_devices, ARRAY_SIZE(m527x_devices));
	return 0;
}

arch_initcall(init_BSP);

/***************************************************************************/