1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3  * BRIEF MODULE DESCRIPTION
4  *	MyCable XXS1500 board support
5  *
6  * Copyright 2003, 2008 MontaVista Software Inc.
7  * Author: MontaVista Software, Inc. <source@mvista.com>
8  */
9 
10 #include <linux/kernel.h>
11 #include <linux/init.h>
12 #include <linux/interrupt.h>
13 #include <linux/platform_device.h>
14 #include <linux/gpio.h>
15 #include <linux/delay.h>
16 #include <linux/pm.h>
17 #include <asm/bootinfo.h>
18 #include <asm/reboot.h>
19 #include <asm/setup.h>
20 #include <asm/mach-au1x00/au1000.h>
21 #include <prom.h>
22 
23 const char *get_system_type(void)
24 {
25 	return "XXS1500";
26 }
27 
28 void __init prom_init(void)
29 {
30 	unsigned char *memsize_str;
31 	unsigned long memsize;
32 
33 	prom_argc = fw_arg0;
34 	prom_argv = (char **)fw_arg1;
35 	prom_envp = (char **)fw_arg2;
36 
37 	prom_init_cmdline();
38 
39 	memsize_str = prom_getenv("memsize");
40 	if (!memsize_str || kstrtoul(memsize_str, 0, &memsize))
41 		memsize = 0x04000000;
42 
43 	add_memory_region(0, memsize, BOOT_MEM_RAM);
44 }
45 
46 void prom_putchar(char c)
47 {
48 	alchemy_uart_putchar(AU1000_UART0_PHYS_ADDR, c);
49 }
50 
51 static void xxs1500_reset(char *c)
52 {
53 	/* Jump to the reset vector */
54 	__asm__ __volatile__("jr\t%0" : : "r"(0xbfc00000));
55 }
56 
57 static void xxs1500_power_off(void)
58 {
59 	while (1)
60 		asm volatile (
61 		"	.set	mips32					\n"
62 		"	wait						\n"
63 		"	.set	mips0					\n");
64 }
65 
66 void __init board_setup(void)
67 {
68 	u32 pin_func;
69 
70 	pm_power_off = xxs1500_power_off;
71 	_machine_halt = xxs1500_power_off;
72 	_machine_restart = xxs1500_reset;
73 
74 	alchemy_gpio1_input_enable();
75 	alchemy_gpio2_enable();
76 
77 	/* Set multiple use pins (UART3/GPIO) to UART (it's used as UART too) */
78 	pin_func  = alchemy_rdsys(AU1000_SYS_PINFUNC) & ~SYS_PF_UR3;
79 	pin_func |= SYS_PF_UR3;
80 	alchemy_wrsys(pin_func, AU1000_SYS_PINFUNC);
81 
82 	/* Enable UART */
83 	alchemy_uart_enable(AU1000_UART3_PHYS_ADDR);
84 	/* Enable DTR (MCR bit 0) = USB power up */
85 	__raw_writel(1, (void __iomem *)KSEG1ADDR(AU1000_UART3_PHYS_ADDR + 0x18));
86 	wmb();
87 }
88 
89 /******************************************************************************/
90 
91 static struct resource xxs1500_pcmcia_res[] = {
92 	{
93 		.name	= "pcmcia-io",
94 		.flags	= IORESOURCE_MEM,
95 		.start	= AU1000_PCMCIA_IO_PHYS_ADDR,
96 		.end	= AU1000_PCMCIA_IO_PHYS_ADDR + 0x000400000 - 1,
97 	},
98 	{
99 		.name	= "pcmcia-attr",
100 		.flags	= IORESOURCE_MEM,
101 		.start	= AU1000_PCMCIA_ATTR_PHYS_ADDR,
102 		.end	= AU1000_PCMCIA_ATTR_PHYS_ADDR + 0x000400000 - 1,
103 	},
104 	{
105 		.name	= "pcmcia-mem",
106 		.flags	= IORESOURCE_MEM,
107 		.start	= AU1000_PCMCIA_MEM_PHYS_ADDR,
108 		.end	= AU1000_PCMCIA_MEM_PHYS_ADDR + 0x000400000 - 1,
109 	},
110 };
111 
112 static struct platform_device xxs1500_pcmcia_dev = {
113 	.name		= "xxs1500_pcmcia",
114 	.id		= -1,
115 	.num_resources	= ARRAY_SIZE(xxs1500_pcmcia_res),
116 	.resource	= xxs1500_pcmcia_res,
117 };
118 
119 static struct platform_device *xxs1500_devs[] __initdata = {
120 	&xxs1500_pcmcia_dev,
121 };
122 
123 static int __init xxs1500_dev_init(void)
124 {
125 	irq_set_irq_type(AU1500_GPIO204_INT, IRQ_TYPE_LEVEL_HIGH);
126 	irq_set_irq_type(AU1500_GPIO201_INT, IRQ_TYPE_LEVEL_LOW);
127 	irq_set_irq_type(AU1500_GPIO202_INT, IRQ_TYPE_LEVEL_LOW);
128 	irq_set_irq_type(AU1500_GPIO203_INT, IRQ_TYPE_LEVEL_LOW);
129 	irq_set_irq_type(AU1500_GPIO205_INT, IRQ_TYPE_LEVEL_LOW);
130 	irq_set_irq_type(AU1500_GPIO207_INT, IRQ_TYPE_LEVEL_LOW);
131 
132 	irq_set_irq_type(AU1500_GPIO0_INT, IRQ_TYPE_LEVEL_LOW);
133 	irq_set_irq_type(AU1500_GPIO1_INT, IRQ_TYPE_LEVEL_LOW);
134 	irq_set_irq_type(AU1500_GPIO2_INT, IRQ_TYPE_LEVEL_LOW);
135 	irq_set_irq_type(AU1500_GPIO3_INT, IRQ_TYPE_LEVEL_LOW);
136 	irq_set_irq_type(AU1500_GPIO4_INT, IRQ_TYPE_LEVEL_LOW); /* CF irq */
137 	irq_set_irq_type(AU1500_GPIO5_INT, IRQ_TYPE_LEVEL_LOW);
138 
139 	return platform_add_devices(xxs1500_devs,
140 				    ARRAY_SIZE(xxs1500_devs));
141 }
142 device_initcall(xxs1500_dev_init);
143