tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
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
23const char *get_system_type(void)
24{
25 return "XXS1500";
26}
27
28void __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
46void prom_putchar(char c)
47{
48 alchemy_uart_putchar(AU1000_UART0_PHYS_ADDR, c);
49}
50
51static void xxs1500_reset(char *c)
52{
53 /* Jump to the reset vector */
54 __asm__ __volatile__("jr\t%0" : : "r"(0xbfc00000));
55}
56
57static 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
66void __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
91static 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
112static 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
119static struct platform_device *xxs1500_devs[] __initdata = {
120 &xxs1500_pcmcia_dev,
121};
122
123static 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}
142device_initcall(xxs1500_dev_init);