1 // SPDX-License-Identifier: GPL-2.0
2 /*
3  * June 2006 Steve Glendinning <steve.glendinning@shawell.net>
4  *
5  * Polaris-specific resource declaration
6  *
7  */
8 
9 #include <linux/init.h>
10 #include <linux/interrupt.h>
11 #include <linux/irq.h>
12 #include <linux/platform_device.h>
13 #include <linux/regulator/fixed.h>
14 #include <linux/regulator/machine.h>
15 #include <linux/smsc911x.h>
16 #include <linux/io.h>
17 #include <asm/irq.h>
18 #include <asm/machvec.h>
19 #include <asm/heartbeat.h>
20 #include <cpu/gpio.h>
21 #include <mach-se/mach/se.h>
22 
23 #define BCR2		(0xFFFFFF62)
24 #define WCR2		(0xFFFFFF66)
25 #define AREA5_WAIT_CTRL	(0x1C00)
26 #define WAIT_STATES_10	(0x7)
27 
28 /* Dummy supplies, where voltage doesn't matter */
29 static struct regulator_consumer_supply dummy_supplies[] = {
30 	REGULATOR_SUPPLY("vddvario", "smsc911x.0"),
31 	REGULATOR_SUPPLY("vdd33a", "smsc911x.0"),
32 };
33 
34 static struct resource smsc911x_resources[] = {
35 	[0] = {
36 		.name		= "smsc911x-memory",
37 		.start		= PA_EXT5,
38 		.end		= PA_EXT5 + 0x1fff,
39 		.flags		= IORESOURCE_MEM,
40 	},
41 	[1] = {
42 		.name		= "smsc911x-irq",
43 		.start		= IRQ0_IRQ,
44 		.end		= IRQ0_IRQ,
45 		.flags		= IORESOURCE_IRQ,
46 	},
47 };
48 
49 static struct smsc911x_platform_config smsc911x_config = {
50 	.irq_polarity	= SMSC911X_IRQ_POLARITY_ACTIVE_LOW,
51 	.irq_type	= SMSC911X_IRQ_TYPE_OPEN_DRAIN,
52 	.flags		= SMSC911X_USE_32BIT,
53 	.phy_interface	= PHY_INTERFACE_MODE_MII,
54 };
55 
56 static struct platform_device smsc911x_device = {
57 	.name		= "smsc911x",
58 	.id		= 0,
59 	.num_resources	= ARRAY_SIZE(smsc911x_resources),
60 	.resource	= smsc911x_resources,
61 	.dev = {
62 		.platform_data = &smsc911x_config,
63 	},
64 };
65 
66 static unsigned char heartbeat_bit_pos[] = { 0, 1, 2, 3 };
67 
68 static struct heartbeat_data heartbeat_data = {
69 	.bit_pos	= heartbeat_bit_pos,
70 	.nr_bits	= ARRAY_SIZE(heartbeat_bit_pos),
71 };
72 
73 static struct resource heartbeat_resource = {
74 	.start	= PORT_PCDR,
75 	.end	= PORT_PCDR,
76 	.flags	= IORESOURCE_MEM | IORESOURCE_MEM_8BIT,
77 };
78 
79 static struct platform_device heartbeat_device = {
80 	.name		= "heartbeat",
81 	.id		= -1,
82 	.dev	= {
83 		.platform_data	= &heartbeat_data,
84 	},
85 	.num_resources	= 1,
86 	.resource	= &heartbeat_resource,
87 };
88 
89 static struct platform_device *polaris_devices[] __initdata = {
90 	&smsc911x_device,
91 	&heartbeat_device,
92 };
93 
polaris_initialise(void)94 static int __init polaris_initialise(void)
95 {
96 	u16 wcr, bcr_mask;
97 
98 	printk(KERN_INFO "Configuring Polaris external bus\n");
99 
100 	regulator_register_fixed(0, dummy_supplies, ARRAY_SIZE(dummy_supplies));
101 
102 	/* Configure area 5 with 2 wait states */
103 	wcr = __raw_readw(WCR2);
104 	wcr &= (~AREA5_WAIT_CTRL);
105 	wcr |= (WAIT_STATES_10 << 10);
106 	__raw_writew(wcr, WCR2);
107 
108 	/* Configure area 5 for 32-bit access */
109 	bcr_mask = __raw_readw(BCR2);
110 	bcr_mask |= 1 << 10;
111 	__raw_writew(bcr_mask, BCR2);
112 
113 	return platform_add_devices(polaris_devices,
114 				    ARRAY_SIZE(polaris_devices));
115 }
116 arch_initcall(polaris_initialise);
117 
118 static struct ipr_data ipr_irq_table[] = {
119 	/* External IRQs */
120 	{ IRQ0_IRQ, 0,  0,  1, },	/* IRQ0 */
121 	{ IRQ1_IRQ, 0,  4,  1, },	/* IRQ1 */
122 };
123 
124 static unsigned long ipr_offsets[] = {
125 	INTC_IPRC
126 };
127 
128 static struct ipr_desc ipr_irq_desc = {
129 	.ipr_offsets	= ipr_offsets,
130 	.nr_offsets	= ARRAY_SIZE(ipr_offsets),
131 
132 	.ipr_data	= ipr_irq_table,
133 	.nr_irqs	= ARRAY_SIZE(ipr_irq_table),
134 	.chip = {
135 		.name	= "sh7709-ext",
136 	},
137 };
138 
init_polaris_irq(void)139 static void __init init_polaris_irq(void)
140 {
141 	/* Disable all interrupts */
142 	__raw_writew(0, BCR_ILCRA);
143 	__raw_writew(0, BCR_ILCRB);
144 	__raw_writew(0, BCR_ILCRC);
145 	__raw_writew(0, BCR_ILCRD);
146 	__raw_writew(0, BCR_ILCRE);
147 	__raw_writew(0, BCR_ILCRF);
148 	__raw_writew(0, BCR_ILCRG);
149 
150 	register_ipr_controller(&ipr_irq_desc);
151 }
152 
153 static struct sh_machine_vector mv_polaris __initmv = {
154 	.mv_name		= "Polaris",
155 	.mv_init_irq		= init_polaris_irq,
156 };
157