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board-apsh4a3a.c
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1 /*
2  * ALPHAPROJECT AP-SH4A-3A Support.
3  *
4  * Copyright (C) 2010 ALPHAPROJECT Co.,Ltd.
5  * Copyright (C) 2008 Yoshihiro Shimoda
6  * Copyright (C) 2009 Paul Mundt
7  *
8  * This file is subject to the terms and conditions of the GNU General Public
9  * License. See the file "COPYING" in the main directory of this archive
10  * for more details.
11  */
12 #include <linux/init.h>
13 #include <linux/platform_device.h>
14 #include <linux/io.h>
15 #include <linux/mtd/physmap.h>
16 #include <linux/regulator/fixed.h>
18 #include <linux/smsc911x.h>
19 #include <linux/irq.h>
20 #include <linux/clk.h>
21 #include <asm/machvec.h>
22 #include <asm/sizes.h>
23 #include <asm/clock.h>
24 
25 static struct mtd_partition nor_flash_partitions[] = {
26  {
27  .name = "loader",
28  .offset = 0x00000000,
29  .size = 512 * 1024,
30  },
31  {
32  .name = "bootenv",
33  .offset = MTDPART_OFS_APPEND,
34  .size = 512 * 1024,
35  },
36  {
37  .name = "kernel",
38  .offset = MTDPART_OFS_APPEND,
39  .size = 4 * 1024 * 1024,
40  },
41  {
42  .name = "data",
43  .offset = MTDPART_OFS_APPEND,
44  .size = MTDPART_SIZ_FULL,
45  },
46 };
47 
48 static struct physmap_flash_data nor_flash_data = {
49  .width = 4,
50  .parts = nor_flash_partitions,
51  .nr_parts = ARRAY_SIZE(nor_flash_partitions),
52 };
53 
54 static struct resource nor_flash_resources[] = {
55  [0] = {
56  .start = 0x00000000,
57  .end = 0x01000000 - 1,
58  .flags = IORESOURCE_MEM,
59  }
60 };
61 
62 static struct platform_device nor_flash_device = {
63  .name = "physmap-flash",
64  .dev = {
65  .platform_data = &nor_flash_data,
66  },
67  .num_resources = ARRAY_SIZE(nor_flash_resources),
68  .resource = nor_flash_resources,
69 };
70 
71 /* Dummy supplies, where voltage doesn't matter */
72 static struct regulator_consumer_supply dummy_supplies[] = {
73  REGULATOR_SUPPLY("vddvario", "smsc911x"),
74  REGULATOR_SUPPLY("vdd33a", "smsc911x"),
75 };
76 
77 static struct resource smsc911x_resources[] = {
78  [0] = {
79  .name = "smsc911x-memory",
80  .start = 0xA4000000,
81  .end = 0xA4000000 + SZ_256 - 1,
82  .flags = IORESOURCE_MEM,
83  },
84  [1] = {
85  .name = "smsc911x-irq",
86  .start = evt2irq(0x200),
87  .end = evt2irq(0x200),
88  .flags = IORESOURCE_IRQ,
89  },
90 };
91 
92 static struct smsc911x_platform_config smsc911x_config = {
93  .irq_polarity = SMSC911X_IRQ_POLARITY_ACTIVE_LOW,
94  .irq_type = SMSC911X_IRQ_TYPE_OPEN_DRAIN,
95  .flags = SMSC911X_USE_16BIT,
96  .phy_interface = PHY_INTERFACE_MODE_MII,
97 };
98 
99 static struct platform_device smsc911x_device = {
100  .name = "smsc911x",
101  .id = -1,
102  .num_resources = ARRAY_SIZE(smsc911x_resources),
103  .resource = smsc911x_resources,
104  .dev = {
105  .platform_data = &smsc911x_config,
106  },
107 };
108 
109 static struct platform_device *apsh4a3a_devices[] __initdata = {
110  &nor_flash_device,
111  &smsc911x_device,
112 };
113 
114 static int __init apsh4a3a_devices_setup(void)
115 {
116  regulator_register_fixed(0, dummy_supplies, ARRAY_SIZE(dummy_supplies));
117 
118  return platform_add_devices(apsh4a3a_devices,
119  ARRAY_SIZE(apsh4a3a_devices));
120 }
121 device_initcall(apsh4a3a_devices_setup);
122 
123 static int apsh4a3a_clk_init(void)
124 {
125  struct clk *clk;
126  int ret;
127 
128  clk = clk_get(NULL, "extal");
129  if (IS_ERR(clk))
130  return PTR_ERR(clk);
131  ret = clk_set_rate(clk, 33333000);
132  clk_put(clk);
133 
134  return ret;
135 }
136 
137 /* Initialize the board */
138 static void __init apsh4a3a_setup(char **cmdline_p)
139 {
140  printk(KERN_INFO "Alpha Project AP-SH4A-3A support:\n");
141 }
142 
143 static void __init apsh4a3a_init_irq(void)
144 {
146 }
147 
148 /* Return the board specific boot mode pin configuration */
149 static int apsh4a3a_mode_pins(void)
150 {
151  int value = 0;
152 
153  /* These are the factory default settings of SW1 and SW2.
154  * If you change these dip switches then you will need to
155  * adjust the values below as well.
156  */
157  value &= ~MODE_PIN0; /* Clock Mode 16 */
158  value &= ~MODE_PIN1;
159  value &= ~MODE_PIN2;
160  value &= ~MODE_PIN3;
161  value |= MODE_PIN4;
162  value &= ~MODE_PIN5; /* 16-bit Area0 bus width */
163  value |= MODE_PIN6; /* Area 0 SRAM interface */
164  value |= MODE_PIN7;
165  value |= MODE_PIN8; /* Little Endian */
166  value |= MODE_PIN9; /* Master Mode */
167  value |= MODE_PIN10; /* Crystal resonator */
168  value |= MODE_PIN11; /* Display Unit */
169  value |= MODE_PIN12;
170  value &= ~MODE_PIN13; /* 29-bit address mode */
171  value |= MODE_PIN14; /* No PLL step-up */
172 
173  return value;
174 }
175 
176 /*
177  * The Machine Vector
178  */
179 static struct sh_machine_vector mv_apsh4a3a __initmv = {
180  .mv_name = "AP-SH4A-3A",
181  .mv_setup = apsh4a3a_setup,
182  .mv_clk_init = apsh4a3a_clk_init,
183  .mv_init_irq = apsh4a3a_init_irq,
184  .mv_mode_pins = apsh4a3a_mode_pins,
185 };