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cpu-8815.c
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1 /*
2  * Copyright STMicroelectronics, 2007.
3  *
4  * This program is free software; you can redistribute it and/or modify
5  * it under the terms of the GNU General Public License as published by
6  * the Free Software Foundation; either version 2 of the License, or
7  * (at your option) any later version.
8  *
9  * This program is distributed in the hope that it will be useful,
10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12  * GNU General Public License for more details.
13  *
14  * You should have received a copy of the GNU General Public License
15  * along with this program; if not, write to the Free Software
16  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
17  */
18 
19 #include <linux/types.h>
20 #include <linux/init.h>
21 #include <linux/device.h>
22 #include <linux/amba/bus.h>
23 #include <linux/platform_device.h>
24 #include <linux/io.h>
25 #include <linux/slab.h>
26 #include <linux/irq.h>
27 #include <linux/dma-mapping.h>
29 
30 #include <plat/gpio-nomadik.h>
31 #include <mach/hardware.h>
32 #include <mach/irqs.h>
33 #include <asm/mach/map.h>
34 #include <asm/hardware/vic.h>
35 
36 #include <asm/cacheflush.h>
38 
39 #include "cpu-8815.h"
40 
41 /* The 8815 has 4 GPIO blocks, let's register them immediately */
42 static resource_size_t __initdata cpu8815_gpio_base[] = {
47 };
48 
49 static struct platform_device *
50 cpu8815_add_gpio(int id, resource_size_t addr, int irq,
52 {
53  struct resource resources[] = {
54  {
55  .start = addr,
56  .end = addr + 127,
57  .flags = IORESOURCE_MEM,
58  },
59  {
60  .start = irq,
61  .end = irq,
62  .flags = IORESOURCE_IRQ,
63  }
64  };
65 
66  return platform_device_register_resndata(NULL, "gpio", id,
67  resources, ARRAY_SIZE(resources),
68  pdata, sizeof(*pdata));
69 }
70 
71 void cpu8815_add_gpios(resource_size_t *base, int num, int irq,
72  struct nmk_gpio_platform_data *pdata)
73 {
74  int first = 0;
75  int i;
76 
77  for (i = 0; i < num; i++, first += 32, irq++) {
78  pdata->first_gpio = first;
79  pdata->first_irq = NOMADIK_GPIO_TO_IRQ(first);
80  pdata->num_gpio = 32;
81 
82  cpu8815_add_gpio(i, base[i], irq, pdata);
83  }
84 }
85 
86 static inline void
87 cpu8815_add_pinctrl(struct device *parent, const char *name)
88 {
89  struct platform_device_info pdevinfo = {
90  .parent = parent,
91  .name = name,
92  .id = -1,
93  };
94 
96 }
97 
98 static int __init cpu8815_init(void)
99 {
100  struct nmk_gpio_platform_data pdata = {
101  /* No custom data yet */
102  };
103 
104  cpu8815_add_gpios(cpu8815_gpio_base, ARRAY_SIZE(cpu8815_gpio_base),
105  IRQ_GPIO0, &pdata);
106  cpu8815_add_pinctrl(NULL, "pinctrl-stn8815");
107  amba_apb_device_add(NULL, "rng", NOMADIK_RNG_BASE, SZ_4K, 0, 0, NULL, 0);
109  return 0;
110 }
111 arch_initcall(cpu8815_init);
112 
113 /* All SoC devices live in the same area (see hardware.h) */
114 static struct map_desc nomadik_io_desc[] __initdata = {
115  {
116  .virtual = NOMADIK_IO_VIRTUAL,
118  .length = NOMADIK_IO_SIZE,
119  .type = MT_DEVICE,
120  }
121  /* static ram and secured ram may be added later */
122 };
123 
125 {
126  iotable_init(nomadik_io_desc, ARRAY_SIZE(nomadik_io_desc));
127 }
128 
130 {
131  /* This modified VIC cell has two register blocks, at 0 and 0x20 */
132  vic_init(io_p2v(NOMADIK_IC_BASE + 0x00), IRQ_VIC_START + 0, ~0, 0);
133  vic_init(io_p2v(NOMADIK_IC_BASE + 0x20), IRQ_VIC_START + 32, ~0, 0);
134 
135  /*
136  * Init clocks here so that they are available for system timer
137  * initialization.
138  */
140 }
141 
142 /*
143  * This function is called from the board init ("init_machine").
144  */
146 {
147 #ifdef CONFIG_CACHE_L2X0
148  /* At full speed latency must be >=2, so 0x249 in low bits */
149  l2x0_init(io_p2v(NOMADIK_L2CC_BASE), 0x00730249, 0xfe000fff);
150 #endif
151  return;
152 }
153 
154 void cpu8815_restart(char mode, const char *cmd)
155 {
156  void __iomem *src_rstsr = io_p2v(NOMADIK_SRC_BASE + 0x18);
157 
158  /* FIXME: use egpio when implemented */
159 
160  /* Write anything to Reset status register */
161  writel(1, src_rstsr);
162 }