981dc1e1da518b1ddf5f6340085837ad07d7e444
[linux-3.10.git] / arch / arm / mach-highbank / highbank.c
1 /*
2  * Copyright 2010-2011 Calxeda, Inc.
3  *
4  * This program is free software; you can redistribute it and/or modify it
5  * under the terms and conditions of the GNU General Public License,
6  * version 2, as published by the Free Software Foundation.
7  *
8  * This program is distributed in the hope it will be useful, but WITHOUT
9  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
10  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
11  * more details.
12  *
13  * You should have received a copy of the GNU General Public License along with
14  * this program.  If not, see <http://www.gnu.org/licenses/>.
15  */
16 #include <linux/clk.h>
17 #include <linux/clkdev.h>
18 #include <linux/dma-mapping.h>
19 #include <linux/io.h>
20 #include <linux/irq.h>
21 #include <linux/irqdomain.h>
22 #include <linux/of.h>
23 #include <linux/of_irq.h>
24 #include <linux/of_platform.h>
25 #include <linux/of_address.h>
26 #include <linux/smp.h>
27 #include <linux/amba/bus.h>
28
29 #include <asm/arch_timer.h>
30 #include <asm/cacheflush.h>
31 #include <asm/smp_plat.h>
32 #include <asm/smp_twd.h>
33 #include <asm/hardware/arm_timer.h>
34 #include <asm/hardware/timer-sp.h>
35 #include <asm/hardware/gic.h>
36 #include <asm/hardware/cache-l2x0.h>
37 #include <asm/mach/arch.h>
38 #include <asm/mach/map.h>
39 #include <asm/mach/time.h>
40
41 #include "core.h"
42 #include "sysregs.h"
43
44 void __iomem *sregs_base;
45 void __iomem *scu_base_addr;
46
47 static void __init highbank_scu_map_io(void)
48 {
49         unsigned long base;
50
51         /* Get SCU base */
52         asm("mrc p15, 4, %0, c15, c0, 0" : "=r" (base));
53
54         scu_base_addr = ioremap(base, SZ_4K);
55 }
56
57 #define HB_JUMP_TABLE_PHYS(cpu)         (0x40 + (0x10 * (cpu)))
58 #define HB_JUMP_TABLE_VIRT(cpu)         phys_to_virt(HB_JUMP_TABLE_PHYS(cpu))
59
60 void highbank_set_cpu_jump(int cpu, void *jump_addr)
61 {
62         cpu = cpu_logical_map(cpu);
63         writel(virt_to_phys(jump_addr), HB_JUMP_TABLE_VIRT(cpu));
64         __cpuc_flush_dcache_area(HB_JUMP_TABLE_VIRT(cpu), 16);
65         outer_clean_range(HB_JUMP_TABLE_PHYS(cpu),
66                           HB_JUMP_TABLE_PHYS(cpu) + 15);
67 }
68
69 const static struct of_device_id irq_match[] = {
70         { .compatible = "arm,cortex-a15-gic", .data = gic_of_init, },
71         { .compatible = "arm,cortex-a9-gic", .data = gic_of_init, },
72         {}
73 };
74
75 #ifdef CONFIG_CACHE_L2X0
76 static void highbank_l2x0_disable(void)
77 {
78         /* Disable PL310 L2 Cache controller */
79         highbank_smc1(0x102, 0x0);
80 }
81 #endif
82
83 static void __init highbank_init_irq(void)
84 {
85         of_irq_init(irq_match);
86
87         if (of_find_compatible_node(NULL, NULL, "arm,cortex-a9"))
88                 highbank_scu_map_io();
89
90 #ifdef CONFIG_CACHE_L2X0
91         /* Enable PL310 L2 Cache controller */
92         highbank_smc1(0x102, 0x1);
93         l2x0_of_init(0, ~0UL);
94         outer_cache.disable = highbank_l2x0_disable;
95 #endif
96 }
97
98 static struct clk_lookup lookup = {
99         .dev_id = "sp804",
100         .con_id = NULL,
101 };
102
103 static void __init highbank_timer_init(void)
104 {
105         int irq;
106         struct device_node *np;
107         void __iomem *timer_base;
108
109         /* Map system registers */
110         np = of_find_compatible_node(NULL, NULL, "calxeda,hb-sregs");
111         sregs_base = of_iomap(np, 0);
112         WARN_ON(!sregs_base);
113
114         np = of_find_compatible_node(NULL, NULL, "arm,sp804");
115         timer_base = of_iomap(np, 0);
116         WARN_ON(!timer_base);
117         irq = irq_of_parse_and_map(np, 0);
118
119         highbank_clocks_init();
120         lookup.clk = of_clk_get(np, 0);
121         clkdev_add(&lookup);
122
123         sp804_clocksource_and_sched_clock_init(timer_base + 0x20, "timer1");
124         sp804_clockevents_init(timer_base, irq, "timer0");
125
126         twd_local_timer_of_register();
127
128         arch_timer_of_register();
129         arch_timer_sched_clock_init();
130 }
131
132 static struct sys_timer highbank_timer = {
133         .init = highbank_timer_init,
134 };
135
136 static void highbank_power_off(void)
137 {
138         highbank_set_pwr_shutdown();
139
140         while (1)
141                 cpu_do_idle();
142 }
143
144 static int highbank_platform_notifier(struct notifier_block *nb,
145                                   unsigned long event, void *__dev)
146 {
147         struct resource *res;
148         int reg = -1;
149         struct device *dev = __dev;
150
151         if (event != BUS_NOTIFY_ADD_DEVICE)
152                 return NOTIFY_DONE;
153
154         if (of_device_is_compatible(dev->of_node, "calxeda,hb-ahci"))
155                 reg = 0xc;
156         else if (of_device_is_compatible(dev->of_node, "calxeda,hb-sdhci"))
157                 reg = 0x18;
158         else if (of_device_is_compatible(dev->of_node, "arm,pl330"))
159                 reg = 0x20;
160         else if (of_device_is_compatible(dev->of_node, "calxeda,hb-xgmac")) {
161                 res = platform_get_resource(to_platform_device(dev),
162                                             IORESOURCE_MEM, 0);
163                 if (res) {
164                         if (res->start == 0xfff50000)
165                                 reg = 0;
166                         else if (res->start == 0xfff51000)
167                                 reg = 4;
168                 }
169         }
170
171         if (reg < 0)
172                 return NOTIFY_DONE;
173
174         if (of_property_read_bool(dev->of_node, "dma-coherent")) {
175                 writel(0xff31, sregs_base + reg);
176                 set_dma_ops(dev, &arm_coherent_dma_ops);
177         } else
178                 writel(0, sregs_base + reg);
179
180         return NOTIFY_OK;
181 }
182
183 static struct notifier_block highbank_amba_nb = {
184         .notifier_call = highbank_platform_notifier,
185 };
186
187 static struct notifier_block highbank_platform_nb = {
188         .notifier_call = highbank_platform_notifier,
189 };
190
191 static void __init highbank_init(void)
192 {
193         pm_power_off = highbank_power_off;
194         highbank_pm_init();
195
196         bus_register_notifier(&platform_bus_type, &highbank_platform_nb);
197         bus_register_notifier(&amba_bustype, &highbank_amba_nb);
198
199         of_platform_populate(NULL, of_default_bus_match_table, NULL, NULL);
200 }
201
202 static const char *highbank_match[] __initconst = {
203         "calxeda,highbank",
204         "calxeda,ecx-2000",
205         NULL,
206 };
207
208 DT_MACHINE_START(HIGHBANK, "Highbank")
209         .smp            = smp_ops(highbank_smp_ops),
210         .map_io         = debug_ll_io_init,
211         .init_irq       = highbank_init_irq,
212         .timer          = &highbank_timer,
213         .handle_irq     = gic_handle_irq,
214         .init_machine   = highbank_init,
215         .dt_compat      = highbank_match,
216         .restart        = highbank_restart,
217 MACHINE_END