xref: /openbmc/linux/arch/sh/boards/board-apsh4ad0a.c (revision 87dfb311)
1 // SPDX-License-Identifier: GPL-2.0
2 /*
3  * ALPHAPROJECT AP-SH4AD-0A Support.
4  *
5  * Copyright (C) 2010 ALPHAPROJECT Co.,Ltd.
6  * Copyright (C) 2010  Matt Fleming
7  * Copyright (C) 2010  Paul Mundt
8  */
9 #include <linux/init.h>
10 #include <linux/platform_device.h>
11 #include <linux/io.h>
12 #include <linux/regulator/fixed.h>
13 #include <linux/regulator/machine.h>
14 #include <linux/smsc911x.h>
15 #include <linux/irq.h>
16 #include <linux/clk.h>
17 #include <asm/machvec.h>
18 #include <linux/sizes.h>
19 
20 /* Dummy supplies, where voltage doesn't matter */
21 static struct regulator_consumer_supply dummy_supplies[] = {
22 	REGULATOR_SUPPLY("vddvario", "smsc911x"),
23 	REGULATOR_SUPPLY("vdd33a", "smsc911x"),
24 };
25 
26 static struct resource smsc911x_resources[] = {
27 	[0] = {
28 		.name		= "smsc911x-memory",
29 		.start		= 0xA4000000,
30 		.end		= 0xA4000000 + SZ_256 - 1,
31 		.flags		= IORESOURCE_MEM,
32 	},
33 	[1] = {
34 		.name		= "smsc911x-irq",
35 		.start		= evt2irq(0x200),
36 		.end		= evt2irq(0x200),
37 		.flags		= IORESOURCE_IRQ,
38 	},
39 };
40 
41 static struct smsc911x_platform_config smsc911x_config = {
42 	.irq_polarity	= SMSC911X_IRQ_POLARITY_ACTIVE_LOW,
43 	.irq_type	= SMSC911X_IRQ_TYPE_OPEN_DRAIN,
44 	.flags		= SMSC911X_USE_16BIT,
45 	.phy_interface	= PHY_INTERFACE_MODE_MII,
46 };
47 
48 static struct platform_device smsc911x_device = {
49 	.name		= "smsc911x",
50 	.id		= -1,
51 	.num_resources	= ARRAY_SIZE(smsc911x_resources),
52 	.resource	= smsc911x_resources,
53 	.dev = {
54 		.platform_data = &smsc911x_config,
55 	},
56 };
57 
58 static struct platform_device *apsh4ad0a_devices[] __initdata = {
59 	&smsc911x_device,
60 };
61 
apsh4ad0a_devices_setup(void)62 static int __init apsh4ad0a_devices_setup(void)
63 {
64 	regulator_register_fixed(0, dummy_supplies, ARRAY_SIZE(dummy_supplies));
65 
66 	return platform_add_devices(apsh4ad0a_devices,
67 				    ARRAY_SIZE(apsh4ad0a_devices));
68 }
69 device_initcall(apsh4ad0a_devices_setup);
70 
apsh4ad0a_mode_pins(void)71 static int apsh4ad0a_mode_pins(void)
72 {
73 	int value = 0;
74 
75 	/* These are the factory default settings of SW1 and SW2.
76 	 * If you change these dip switches then you will need to
77 	 * adjust the values below as well.
78 	 */
79 	value |=  MODE_PIN0;  /* Clock Mode 3 */
80 	value |=  MODE_PIN1;
81 	value &= ~MODE_PIN2;
82 	value &= ~MODE_PIN3;
83 	value &= ~MODE_PIN4;  /* 16-bit Area0 bus width  */
84 	value |=  MODE_PIN5;
85 	value |=  MODE_PIN6;
86 	value |=  MODE_PIN7;  /* Normal mode */
87 	value |=  MODE_PIN8;  /* Little Endian */
88 	value |=  MODE_PIN9;  /* Crystal resonator */
89 	value &= ~MODE_PIN10; /* 29-bit address mode */
90 	value &= ~MODE_PIN11; /* PCI-E Root port */
91 	value &= ~MODE_PIN12; /* 4 lane + 1 lane */
92 	value |=  MODE_PIN13; /* AUD Enable */
93 	value &= ~MODE_PIN14; /* Normal Operation */
94 
95 	return value;
96 }
97 
apsh4ad0a_clk_init(void)98 static int apsh4ad0a_clk_init(void)
99 {
100 	struct clk *clk;
101 	int ret;
102 
103 	clk = clk_get(NULL, "extal");
104 	if (IS_ERR(clk))
105 		return PTR_ERR(clk);
106 	ret = clk_set_rate(clk, 33333000);
107 	clk_put(clk);
108 
109 	return ret;
110 }
111 
112 /* Initialize the board */
apsh4ad0a_setup(char ** cmdline_p)113 static void __init apsh4ad0a_setup(char **cmdline_p)
114 {
115 	pr_info("Alpha Project AP-SH4AD-0A support:\n");
116 }
117 
apsh4ad0a_init_irq(void)118 static void __init apsh4ad0a_init_irq(void)
119 {
120 	plat_irq_setup_pins(IRQ_MODE_IRQ3210);
121 }
122 
123 /*
124  * The Machine Vector
125  */
126 static struct sh_machine_vector mv_apsh4ad0a __initmv = {
127 	.mv_name		= "AP-SH4AD-0A",
128 	.mv_setup		= apsh4ad0a_setup,
129 	.mv_mode_pins		= apsh4ad0a_mode_pins,
130 	.mv_clk_init		= apsh4ad0a_clk_init,
131 	.mv_init_irq		= apsh4ad0a_init_irq,
132 };
133