1 // SPDX-License-Identifier: GPL-2.0
2 /*
3  * ALPHAPROJECT AP-SH4A-3A Support.
4  *
5  * Copyright (C) 2010 ALPHAPROJECT Co.,Ltd.
6  * Copyright (C) 2008  Yoshihiro Shimoda
7  * Copyright (C) 2009  Paul Mundt
8  */
9 #include <linux/init.h>
10 #include <linux/platform_device.h>
11 #include <linux/io.h>
12 #include <linux/mtd/physmap.h>
13 #include <linux/regulator/fixed.h>
14 #include <linux/regulator/machine.h>
15 #include <linux/smsc911x.h>
16 #include <linux/irq.h>
17 #include <linux/clk.h>
18 #include <asm/machvec.h>
19 #include <linux/sizes.h>
20 #include <asm/clock.h>
21 
22 static struct mtd_partition nor_flash_partitions[] = {
23 	{
24 		.name		= "loader",
25 		.offset		= 0x00000000,
26 		.size		= 512 * 1024,
27 	},
28 	{
29 		.name		= "bootenv",
30 		.offset		= MTDPART_OFS_APPEND,
31 		.size		= 512 * 1024,
32 	},
33 	{
34 		.name		= "kernel",
35 		.offset		= MTDPART_OFS_APPEND,
36 		.size		= 4 * 1024 * 1024,
37 	},
38 	{
39 		.name		= "data",
40 		.offset		= MTDPART_OFS_APPEND,
41 		.size		= MTDPART_SIZ_FULL,
42 	},
43 };
44 
45 static struct physmap_flash_data nor_flash_data = {
46 	.width		= 4,
47 	.parts		= nor_flash_partitions,
48 	.nr_parts	= ARRAY_SIZE(nor_flash_partitions),
49 };
50 
51 static struct resource nor_flash_resources[] = {
52 	[0]	= {
53 		.start	= 0x00000000,
54 		.end	= 0x01000000 - 1,
55 		.flags	= IORESOURCE_MEM,
56 	}
57 };
58 
59 static struct platform_device nor_flash_device = {
60 	.name		= "physmap-flash",
61 	.dev		= {
62 		.platform_data	= &nor_flash_data,
63 	},
64 	.num_resources	= ARRAY_SIZE(nor_flash_resources),
65 	.resource	= nor_flash_resources,
66 };
67 
68 /* Dummy supplies, where voltage doesn't matter */
69 static struct regulator_consumer_supply dummy_supplies[] = {
70 	REGULATOR_SUPPLY("vddvario", "smsc911x"),
71 	REGULATOR_SUPPLY("vdd33a", "smsc911x"),
72 };
73 
74 static struct resource smsc911x_resources[] = {
75 	[0] = {
76 		.name		= "smsc911x-memory",
77 		.start		= 0xA4000000,
78 		.end		= 0xA4000000 + SZ_256 - 1,
79 		.flags		= IORESOURCE_MEM,
80 	},
81 	[1] = {
82 		.name		= "smsc911x-irq",
83 		.start		= evt2irq(0x200),
84 		.end		= evt2irq(0x200),
85 		.flags		= IORESOURCE_IRQ,
86 	},
87 };
88 
89 static struct smsc911x_platform_config smsc911x_config = {
90 	.irq_polarity	= SMSC911X_IRQ_POLARITY_ACTIVE_LOW,
91 	.irq_type	= SMSC911X_IRQ_TYPE_OPEN_DRAIN,
92 	.flags		= SMSC911X_USE_16BIT,
93 	.phy_interface	= PHY_INTERFACE_MODE_MII,
94 };
95 
96 static struct platform_device smsc911x_device = {
97 	.name		= "smsc911x",
98 	.id		= -1,
99 	.num_resources	= ARRAY_SIZE(smsc911x_resources),
100 	.resource	= smsc911x_resources,
101 	.dev = {
102 		.platform_data = &smsc911x_config,
103 	},
104 };
105 
106 static struct platform_device *apsh4a3a_devices[] __initdata = {
107 	&nor_flash_device,
108 	&smsc911x_device,
109 };
110 
apsh4a3a_devices_setup(void)111 static int __init apsh4a3a_devices_setup(void)
112 {
113 	regulator_register_fixed(0, dummy_supplies, ARRAY_SIZE(dummy_supplies));
114 
115 	return platform_add_devices(apsh4a3a_devices,
116 				    ARRAY_SIZE(apsh4a3a_devices));
117 }
118 device_initcall(apsh4a3a_devices_setup);
119 
apsh4a3a_clk_init(void)120 static int apsh4a3a_clk_init(void)
121 {
122 	struct clk *clk;
123 	int ret;
124 
125 	clk = clk_get(NULL, "extal");
126 	if (IS_ERR(clk))
127 		return PTR_ERR(clk);
128 	ret = clk_set_rate(clk, 33333000);
129 	clk_put(clk);
130 
131 	return ret;
132 }
133 
134 /* Initialize the board */
apsh4a3a_setup(char ** cmdline_p)135 static void __init apsh4a3a_setup(char **cmdline_p)
136 {
137 	printk(KERN_INFO "Alpha Project AP-SH4A-3A support:\n");
138 }
139 
apsh4a3a_init_irq(void)140 static void __init apsh4a3a_init_irq(void)
141 {
142 	plat_irq_setup_pins(IRQ_MODE_IRQ7654);
143 }
144 
145 /* Return the board specific boot mode pin configuration */
apsh4a3a_mode_pins(void)146 static int apsh4a3a_mode_pins(void)
147 {
148 	int value = 0;
149 
150 	/* These are the factory default settings of SW1 and SW2.
151 	 * If you change these dip switches then you will need to
152 	 * adjust the values below as well.
153 	 */
154 	value &= ~MODE_PIN0;  /* Clock Mode 16 */
155 	value &= ~MODE_PIN1;
156 	value &= ~MODE_PIN2;
157 	value &= ~MODE_PIN3;
158 	value |=  MODE_PIN4;
159 	value &= ~MODE_PIN5;  /* 16-bit Area0 bus width */
160 	value |=  MODE_PIN6;  /* Area 0 SRAM interface */
161 	value |=  MODE_PIN7;
162 	value |=  MODE_PIN8;  /* Little Endian */
163 	value |=  MODE_PIN9;  /* Master Mode */
164 	value |=  MODE_PIN10; /* Crystal resonator */
165 	value |=  MODE_PIN11; /* Display Unit */
166 	value |=  MODE_PIN12;
167 	value &= ~MODE_PIN13; /* 29-bit address mode */
168 	value |=  MODE_PIN14; /* No PLL step-up */
169 
170 	return value;
171 }
172 
173 /*
174  * The Machine Vector
175  */
176 static struct sh_machine_vector mv_apsh4a3a __initmv = {
177 	.mv_name		= "AP-SH4A-3A",
178 	.mv_setup		= apsh4a3a_setup,
179 	.mv_clk_init		= apsh4a3a_clk_init,
180 	.mv_init_irq		= apsh4a3a_init_irq,
181 	.mv_mode_pins		= apsh4a3a_mode_pins,
182 };
183