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 <asm/mach-au1x00/gpio-au1000.h>
22 #include <prom.h>
23
get_system_type(void)24 const char *get_system_type(void)
25 {
26 return "XXS1500";
27 }
28
prom_init(void)29 void __init prom_init(void)
30 {
31 unsigned char *memsize_str;
32 unsigned long memsize;
33
34 prom_argc = fw_arg0;
35 prom_argv = (char **)fw_arg1;
36 prom_envp = (char **)fw_arg2;
37
38 prom_init_cmdline();
39
40 memsize_str = prom_getenv("memsize");
41 if (!memsize_str || kstrtoul(memsize_str, 0, &memsize))
42 memsize = 0x04000000;
43
44 add_memory_region(0, memsize, BOOT_MEM_RAM);
45 }
46
prom_putchar(char c)47 void prom_putchar(char c)
48 {
49 alchemy_uart_putchar(AU1000_UART0_PHYS_ADDR, c);
50 }
51
xxs1500_reset(char * c)52 static void xxs1500_reset(char *c)
53 {
54 /* Jump to the reset vector */
55 __asm__ __volatile__("jr\t%0" : : "r"(0xbfc00000));
56 }
57
xxs1500_power_off(void)58 static void xxs1500_power_off(void)
59 {
60 while (1)
61 asm volatile (
62 " .set mips32 \n"
63 " wait \n"
64 " .set mips0 \n");
65 }
66
board_setup(void)67 void __init board_setup(void)
68 {
69 u32 pin_func;
70
71 pm_power_off = xxs1500_power_off;
72 _machine_halt = xxs1500_power_off;
73 _machine_restart = xxs1500_reset;
74
75 alchemy_gpio1_input_enable();
76 alchemy_gpio2_enable();
77
78 /* Set multiple use pins (UART3/GPIO) to UART (it's used as UART too) */
79 pin_func = alchemy_rdsys(AU1000_SYS_PINFUNC) & ~SYS_PF_UR3;
80 pin_func |= SYS_PF_UR3;
81 alchemy_wrsys(pin_func, AU1000_SYS_PINFUNC);
82
83 /* Enable UART */
84 alchemy_uart_enable(AU1000_UART3_PHYS_ADDR);
85 /* Enable DTR (MCR bit 0) = USB power up */
86 __raw_writel(1, (void __iomem *)KSEG1ADDR(AU1000_UART3_PHYS_ADDR + 0x18));
87 wmb();
88 }
89
90 /******************************************************************************/
91
92 static struct resource xxs1500_pcmcia_res[] = {
93 {
94 .name = "pcmcia-io",
95 .flags = IORESOURCE_MEM,
96 .start = AU1000_PCMCIA_IO_PHYS_ADDR,
97 .end = AU1000_PCMCIA_IO_PHYS_ADDR + 0x000400000 - 1,
98 },
99 {
100 .name = "pcmcia-attr",
101 .flags = IORESOURCE_MEM,
102 .start = AU1000_PCMCIA_ATTR_PHYS_ADDR,
103 .end = AU1000_PCMCIA_ATTR_PHYS_ADDR + 0x000400000 - 1,
104 },
105 {
106 .name = "pcmcia-mem",
107 .flags = IORESOURCE_MEM,
108 .start = AU1000_PCMCIA_MEM_PHYS_ADDR,
109 .end = AU1000_PCMCIA_MEM_PHYS_ADDR + 0x000400000 - 1,
110 },
111 };
112
113 static struct platform_device xxs1500_pcmcia_dev = {
114 .name = "xxs1500_pcmcia",
115 .id = -1,
116 .num_resources = ARRAY_SIZE(xxs1500_pcmcia_res),
117 .resource = xxs1500_pcmcia_res,
118 };
119
120 static struct platform_device *xxs1500_devs[] __initdata = {
121 &xxs1500_pcmcia_dev,
122 };
123
xxs1500_dev_init(void)124 static int __init xxs1500_dev_init(void)
125 {
126 irq_set_irq_type(AU1500_GPIO204_INT, IRQ_TYPE_LEVEL_HIGH);
127 irq_set_irq_type(AU1500_GPIO201_INT, IRQ_TYPE_LEVEL_LOW);
128 irq_set_irq_type(AU1500_GPIO202_INT, IRQ_TYPE_LEVEL_LOW);
129 irq_set_irq_type(AU1500_GPIO203_INT, IRQ_TYPE_LEVEL_LOW);
130 irq_set_irq_type(AU1500_GPIO205_INT, IRQ_TYPE_LEVEL_LOW);
131 irq_set_irq_type(AU1500_GPIO207_INT, IRQ_TYPE_LEVEL_LOW);
132
133 irq_set_irq_type(AU1500_GPIO0_INT, IRQ_TYPE_LEVEL_LOW);
134 irq_set_irq_type(AU1500_GPIO1_INT, IRQ_TYPE_LEVEL_LOW);
135 irq_set_irq_type(AU1500_GPIO2_INT, IRQ_TYPE_LEVEL_LOW);
136 irq_set_irq_type(AU1500_GPIO3_INT, IRQ_TYPE_LEVEL_LOW);
137 irq_set_irq_type(AU1500_GPIO4_INT, IRQ_TYPE_LEVEL_LOW); /* CF irq */
138 irq_set_irq_type(AU1500_GPIO5_INT, IRQ_TYPE_LEVEL_LOW);
139
140 return platform_add_devices(xxs1500_devs,
141 ARRAY_SIZE(xxs1500_devs));
142 }
143 device_initcall(xxs1500_dev_init);
144