summaryrefslogtreecommitdiffstats
path: root/kernel/arch/arm/mach-nomadik/cpu-8815.c
blob: 9bda46f1fab7315c0b1bb7a47ea803ae68222f9b (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
/*
 * Copyright STMicroelectronics, 2007.
 *
 *  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 <linux/types.h>
#include <linux/init.h>
#include <linux/device.h>
#include <linux/amba/bus.h>
#include <linux/platform_device.h>
#include <linux/io.h>
#include <linux/slab.h>
#include <linux/irq.h>
#include <linux/dma-mapping.h>
#include <linux/of_irq.h>
#include <linux/of_gpio.h>
#include <linux/of_address.h>
#include <linux/of_platform.h>
#include <linux/gpio.h>

#include <asm/mach/arch.h>
#include <asm/mach/map.h>
#include <asm/mach/time.h>
#include <asm/mach-types.h>

#include <asm/cacheflush.h>
#include <asm/hardware/cache-l2x0.h>

/*
 * These are the only hard-coded address offsets we still have to use.
 */
#define NOMADIK_FSMC_BASE	0x10100000	/* FSMC registers */
#define NOMADIK_SDRAMC_BASE	0x10110000	/* SDRAM Controller */
#define NOMADIK_CLCDC_BASE	0x10120000	/* CLCD Controller */
#define NOMADIK_MDIF_BASE	0x10120000	/* MDIF */
#define NOMADIK_DMA0_BASE	0x10130000	/* DMA0 Controller */
#define NOMADIK_IC_BASE		0x10140000	/* Vectored Irq Controller */
#define NOMADIK_DMA1_BASE	0x10150000	/* DMA1 Controller */
#define NOMADIK_USB_BASE	0x10170000	/* USB-OTG conf reg base */
#define NOMADIK_CRYP_BASE	0x10180000	/* Crypto processor */
#define NOMADIK_SHA1_BASE	0x10190000	/* SHA-1 Processor */
#define NOMADIK_XTI_BASE	0x101A0000	/* XTI */
#define NOMADIK_RNG_BASE	0x101B0000	/* Random number generator */
#define NOMADIK_SRC_BASE	0x101E0000	/* SRC base */
#define NOMADIK_WDOG_BASE	0x101E1000	/* Watchdog */
#define NOMADIK_MTU0_BASE	0x101E2000	/* Multiple Timer 0 */
#define NOMADIK_MTU1_BASE	0x101E3000	/* Multiple Timer 1 */
#define NOMADIK_GPIO0_BASE	0x101E4000	/* GPIO0 */
#define NOMADIK_GPIO1_BASE	0x101E5000	/* GPIO1 */
#define NOMADIK_GPIO2_BASE	0x101E6000	/* GPIO2 */
#define NOMADIK_GPIO3_BASE	0x101E7000	/* GPIO3 */
#define NOMADIK_RTC_BASE	0x101E8000	/* Real Time Clock base */
#define NOMADIK_PMU_BASE	0x101E9000	/* Power Management Unit */
#define NOMADIK_OWM_BASE	0x101EA000	/* One wire master */
#define NOMADIK_SCR_BASE	0x101EF000	/* Secure Control registers */
#define NOMADIK_MSP2_BASE	0x101F0000	/* MSP 2 interface */
#define NOMADIK_MSP1_BASE	0x101F1000	/* MSP 1 interface */
#define NOMADIK_UART2_BASE	0x101F2000	/* UART 2 interface */
#define NOMADIK_SSIRx_BASE	0x101F3000	/* SSI 8-ch rx interface */
#define NOMADIK_SSITx_BASE	0x101F4000	/* SSI 8-ch tx interface */
#define NOMADIK_MSHC_BASE	0x101F5000	/* Memory Stick(Pro) Host */
#define NOMADIK_SDI_BASE	0x101F6000	/* SD-card/MM-Card */
#define NOMADIK_I2C1_BASE	0x101F7000	/* I2C1 interface */
#define NOMADIK_I2C0_BASE	0x101F8000	/* I2C0 interface */
#define NOMADIK_MSP0_BASE	0x101F9000	/* MSP 0 interface */
#define NOMADIK_FIRDA_BASE	0x101FA000	/* FIrDA interface */
#define NOMADIK_UART1_BASE	0x101FB000	/* UART 1 interface */
#define NOMADIK_SSP_BASE	0x101FC000	/* SSP interface */
#define NOMADIK_UART0_BASE	0x101FD000	/* UART 0 interface */
#define NOMADIK_SGA_BASE	0x101FE000	/* SGA interface */
#define NOMADIK_L2CC_BASE	0x10210000	/* L2 Cache controller */
#define NOMADIK_UART1_VBASE	0xF01FB000

/* This is needed for LL-debug/earlyprintk/debug-macro.S */
static struct map_desc cpu8815_io_desc[] __initdata = {
	{
		.virtual =	NOMADIK_UART1_VBASE,
		.pfn =		__phys_to_pfn(NOMADIK_UART1_BASE),
		.length =	SZ_4K,
		.type =		MT_DEVICE,
	},
};

static void __init cpu8815_map_io(void)
{
	iotable_init(cpu8815_io_desc, ARRAY_SIZE(cpu8815_io_desc));
}

static void cpu8815_restart(enum reboot_mode mode, const char *cmd)
{
	void __iomem *srcbase = ioremap(NOMADIK_SRC_BASE, SZ_4K);

	/* FIXME: use egpio when implemented */

	/* Write anything to Reset status register */
	writel(1, srcbase + 0x18);
}

/*
 * This GPIO pin turns on a line that is used to detect card insertion
 * on this board.
 */
static int __init cpu8815_mmcsd_init(void)
{
	struct device_node *cdbias;
	int gpio, err;

	cdbias = of_find_node_by_path("/usb-s8815/mmcsd-gpio");
	if (!cdbias) {
		pr_info("could not find MMC/SD card detect bias node\n");
		return 0;
	}
	gpio = of_get_gpio(cdbias, 0);
	if (gpio < 0) {
		pr_info("could not obtain MMC/SD card detect bias GPIO\n");
		return 0;
	}
	err = gpio_request(gpio, "card detect bias");
	if (err) {
		pr_info("failed to request card detect bias GPIO %d\n", gpio);
		return -ENODEV;
	}
	err = gpio_direction_output(gpio, 0);
	if (err){
		pr_info("failed to set GPIO %d as output, low\n", gpio);
		return err;
	}
	pr_info("enabled USB-S8815 CD bias GPIO %d, low\n", gpio);
	return 0;
}
device_initcall(cpu8815_mmcsd_init);

static const char * cpu8815_board_compat[] = {
	"st,nomadik-nhk-15",
	"calaosystems,usb-s8815",
	NULL,
};

DT_MACHINE_START(NOMADIK_DT, "Nomadik STn8815")
	/* At full speed latency must be >=2, so 0x249 in low bits */
	.l2c_aux_val	= 0x00700249,
	.l2c_aux_mask	= 0xfe0fefff,
	.map_io		= cpu8815_map_io,
	.restart	= cpu8815_restart,
	.dt_compat      = cpu8815_board_compat,
MACHINE_END