summaryrefslogtreecommitdiffstats
path: root/kernel/arch/powerpc/platforms/83xx/mpc832x_rdb.c
blob: eff5baabc3fbf1600dec624782778fa68fbef448 (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
/*
 * arch/powerpc/platforms/83xx/mpc832x_rdb.c
 *
 * Copyright (C) Freescale Semiconductor, Inc. 2007. All rights reserved.
 *
 * Description:
 * MPC832x RDB board specific routines.
 * This file is based on mpc832x_mds.c and mpc8313_rdb.c
 * Author: Michael Barkowski <michael.barkowski@freescale.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.
 */

#include <linux/pci.h>
#include <linux/interrupt.h>
#include <linux/spi/spi.h>
#include <linux/spi/mmc_spi.h>
#include <linux/mmc/host.h>
#include <linux/of_platform.h>
#include <linux/fsl_devices.h>

#include <asm/time.h>
#include <asm/ipic.h>
#include <asm/udbg.h>
#include <asm/qe.h>
#include <asm/qe_ic.h>
#include <sysdev/fsl_soc.h>
#include <sysdev/fsl_pci.h>

#include "mpc83xx.h"

#undef DEBUG
#ifdef DEBUG
#define DBG(fmt...) udbg_printf(fmt)
#else
#define DBG(fmt...)
#endif

#ifdef CONFIG_QUICC_ENGINE
static int __init of_fsl_spi_probe(char *type, char *compatible, u32 sysclk,
				   struct spi_board_info *board_infos,
				   unsigned int num_board_infos,
				   void (*cs_control)(struct spi_device *dev,
						      bool on))
{
	struct device_node *np;
	unsigned int i = 0;

	for_each_compatible_node(np, type, compatible) {
		int ret;
		unsigned int j;
		const void *prop;
		struct resource res[2];
		struct platform_device *pdev;
		struct fsl_spi_platform_data pdata = {
			.cs_control = cs_control,
		};

		memset(res, 0, sizeof(res));

		pdata.sysclk = sysclk;

		prop = of_get_property(np, "reg", NULL);
		if (!prop)
			goto err;
		pdata.bus_num = *(u32 *)prop;

		prop = of_get_property(np, "cell-index", NULL);
		if (prop)
			i = *(u32 *)prop;

		prop = of_get_property(np, "mode", NULL);
		if (prop && !strcmp(prop, "cpu-qe"))
			pdata.flags = SPI_QE_CPU_MODE;

		for (j = 0; j < num_board_infos; j++) {
			if (board_infos[j].bus_num == pdata.bus_num)
				pdata.max_chipselect++;
		}

		if (!pdata.max_chipselect)
			continue;

		ret = of_address_to_resource(np, 0, &res[0]);
		if (ret)
			goto err;

		ret = of_irq_to_resource(np, 0, &res[1]);
		if (ret == NO_IRQ)
			goto err;

		pdev = platform_device_alloc("mpc83xx_spi", i);
		if (!pdev)
			goto err;

		ret = platform_device_add_data(pdev, &pdata, sizeof(pdata));
		if (ret)
			goto unreg;

		ret = platform_device_add_resources(pdev, res,
						    ARRAY_SIZE(res));
		if (ret)
			goto unreg;

		ret = platform_device_add(pdev);
		if (ret)
			goto unreg;

		goto next;
unreg:
		platform_device_del(pdev);
err:
		pr_err("%s: registration failed\n", np->full_name);
next:
		i++;
	}

	return i;
}

static int __init fsl_spi_init(struct spi_board_info *board_infos,
			       unsigned int num_board_infos,
			       void (*cs_control)(struct spi_device *spi,
						  bool on))
{
	u32 sysclk = -1;
	int ret;

	/* SPI controller is either clocked from QE or SoC clock */
	sysclk = get_brgfreq();
	if (sysclk == -1) {
		sysclk = fsl_get_sys_freq();
		if (sysclk == -1)
			return -ENODEV;
	}

	ret = of_fsl_spi_probe(NULL, "fsl,spi", sysclk, board_infos,
			       num_board_infos, cs_control);
	if (!ret)
		of_fsl_spi_probe("spi", "fsl_spi", sysclk, board_infos,
				 num_board_infos, cs_control);

	return spi_register_board_info(board_infos, num_board_infos);
}

static void mpc83xx_spi_cs_control(struct spi_device *spi, bool on)
{
	pr_debug("%s %d %d\n", __func__, spi->chip_select, on);
	par_io_data_set(3, 13, on);
}

static struct mmc_spi_platform_data mpc832x_mmc_pdata = {
	.ocr_mask = MMC_VDD_33_34,
};

static struct spi_board_info mpc832x_spi_boardinfo = {
	.bus_num = 0x4c0,
	.chip_select = 0,
	.max_speed_hz = 50000000,
	.modalias = "mmc_spi",
	.platform_data = &mpc832x_mmc_pdata,
};

static int __init mpc832x_spi_init(void)
{
	par_io_config_pin(3,  0, 3, 0, 1, 0); /* SPI1 MOSI, I/O */
	par_io_config_pin(3,  1, 3, 0, 1, 0); /* SPI1 MISO, I/O */
	par_io_config_pin(3,  2, 3, 0, 1, 0); /* SPI1 CLK,  I/O */
	par_io_config_pin(3,  3, 2, 0, 1, 0); /* SPI1 SEL,  I   */

	par_io_config_pin(3, 13, 1, 0, 0, 0); /* !SD_CS,    O */
	par_io_config_pin(3, 14, 2, 0, 0, 0); /* SD_INSERT, I */
	par_io_config_pin(3, 15, 2, 0, 0, 0); /* SD_PROTECT,I */

	/*
	 * Don't bother with legacy stuff when device tree contains
	 * mmc-spi-slot node.
	 */
	if (of_find_compatible_node(NULL, NULL, "mmc-spi-slot"))
		return 0;
	return fsl_spi_init(&mpc832x_spi_boardinfo, 1, mpc83xx_spi_cs_control);
}
machine_device_initcall(mpc832x_rdb, mpc832x_spi_init);
#endif /* CONFIG_QUICC_ENGINE */

/* ************************************************************************
 *
 * Setup the architecture
 *
 */
static void __init mpc832x_rdb_setup_arch(void)
{
#if defined(CONFIG_QUICC_ENGINE)
	struct device_node *np;
#endif

	if (ppc_md.progress)
		ppc_md.progress("mpc832x_rdb_setup_arch()", 0);

	mpc83xx_setup_pci();

#ifdef CONFIG_QUICC_ENGINE
	qe_reset();

	if ((np = of_find_node_by_name(NULL, "par_io")) != NULL) {
		par_io_init(np);
		of_node_put(np);

		for (np = NULL; (np = of_find_node_by_name(np, "ucc")) != NULL;)
			par_io_of_config(np);
	}
#endif				/* CONFIG_QUICC_ENGINE */
}

machine_device_initcall(mpc832x_rdb, mpc83xx_declare_of_platform_devices);

/*
 * Called very early, MMU is off, device-tree isn't unflattened
 */
static int __init mpc832x_rdb_probe(void)
{
	unsigned long root = of_get_flat_dt_root();

	return of_flat_dt_is_compatible(root, "MPC832xRDB");
}

define_machine(mpc832x_rdb) {
	.name		= "MPC832x RDB",
	.probe		= mpc832x_rdb_probe,
	.setup_arch	= mpc832x_rdb_setup_arch,
	.init_IRQ	= mpc83xx_ipic_and_qe_init_IRQ,
	.get_irq	= ipic_get_irq,
	.restart	= mpc83xx_restart,
	.time_init	= mpc83xx_time_init,
	.calibrate_decr	= generic_calibrate_decr,
	.progress	= udbg_progress,
};