Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input
[~shefty/rdma-dev.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/cputype.h>
32 #include <asm/smp_plat.h>
33 #include <asm/smp_twd.h>
34 #include <asm/hardware/arm_timer.h>
35 #include <asm/hardware/timer-sp.h>
36 #include <asm/hardware/gic.h>
37 #include <asm/hardware/cache-l2x0.h>
38 #include <asm/mach/arch.h>
39 #include <asm/mach/map.h>
40 #include <asm/mach/time.h>
41
42 #include "core.h"
43 #include "sysregs.h"
44
45 void __iomem *sregs_base;
46 void __iomem *scu_base_addr;
47
48 static void __init highbank_scu_map_io(void)
49 {
50         unsigned long base;
51
52         /* Get SCU base */
53         asm("mrc p15, 4, %0, c15, c0, 0" : "=r" (base));
54
55         scu_base_addr = ioremap(base, SZ_4K);
56 }
57
58 #define HB_JUMP_TABLE_PHYS(cpu)         (0x40 + (0x10 * (cpu)))
59 #define HB_JUMP_TABLE_VIRT(cpu)         phys_to_virt(HB_JUMP_TABLE_PHYS(cpu))
60
61 void highbank_set_cpu_jump(int cpu, void *jump_addr)
62 {
63         cpu = MPIDR_AFFINITY_LEVEL(cpu_logical_map(cpu), 0);
64         writel(virt_to_phys(jump_addr), HB_JUMP_TABLE_VIRT(cpu));
65         __cpuc_flush_dcache_area(HB_JUMP_TABLE_VIRT(cpu), 16);
66         outer_clean_range(HB_JUMP_TABLE_PHYS(cpu),
67                           HB_JUMP_TABLE_PHYS(cpu) + 15);
68 }
69
70 const static struct of_device_id irq_match[] = {
71         { .compatible = "arm,cortex-a15-gic", .data = gic_of_init, },
72         { .compatible = "arm,cortex-a9-gic", .data = gic_of_init, },
73         {}
74 };
75
76 #ifdef CONFIG_CACHE_L2X0
77 static void highbank_l2x0_disable(void)
78 {
79         /* Disable PL310 L2 Cache controller */
80         highbank_smc1(0x102, 0x0);
81 }
82 #endif
83
84 static void __init highbank_init_irq(void)
85 {
86         of_irq_init(irq_match);
87
88         if (of_find_compatible_node(NULL, NULL, "arm,cortex-a9"))
89                 highbank_scu_map_io();
90
91 #ifdef CONFIG_CACHE_L2X0
92         /* Enable PL310 L2 Cache controller */
93         highbank_smc1(0x102, 0x1);
94         l2x0_of_init(0, ~0UL);
95         outer_cache.disable = highbank_l2x0_disable;
96 #endif
97 }
98
99 static struct clk_lookup lookup = {
100         .dev_id = "sp804",
101         .con_id = NULL,
102 };
103
104 static void __init highbank_timer_init(void)
105 {
106         int irq;
107         struct device_node *np;
108         void __iomem *timer_base;
109
110         /* Map system registers */
111         np = of_find_compatible_node(NULL, NULL, "calxeda,hb-sregs");
112         sregs_base = of_iomap(np, 0);
113         WARN_ON(!sregs_base);
114
115         np = of_find_compatible_node(NULL, NULL, "arm,sp804");
116         timer_base = of_iomap(np, 0);
117         WARN_ON(!timer_base);
118         irq = irq_of_parse_and_map(np, 0);
119
120         highbank_clocks_init();
121         lookup.clk = of_clk_get(np, 0);
122         clkdev_add(&lookup);
123
124         sp804_clocksource_and_sched_clock_init(timer_base + 0x20, "timer1");
125         sp804_clockevents_init(timer_base, irq, "timer0");
126
127         twd_local_timer_of_register();
128
129         arch_timer_of_register();
130         arch_timer_sched_clock_init();
131 }
132
133 static struct sys_timer highbank_timer = {
134         .init = highbank_timer_init,
135 };
136
137 static void highbank_power_off(void)
138 {
139         highbank_set_pwr_shutdown();
140
141         while (1)
142                 cpu_do_idle();
143 }
144
145 static int highbank_platform_notifier(struct notifier_block *nb,
146                                   unsigned long event, void *__dev)
147 {
148         struct resource *res;
149         int reg = -1;
150         struct device *dev = __dev;
151
152         if (event != BUS_NOTIFY_ADD_DEVICE)
153                 return NOTIFY_DONE;
154
155         if (of_device_is_compatible(dev->of_node, "calxeda,hb-ahci"))
156                 reg = 0xc;
157         else if (of_device_is_compatible(dev->of_node, "calxeda,hb-sdhci"))
158                 reg = 0x18;
159         else if (of_device_is_compatible(dev->of_node, "arm,pl330"))
160                 reg = 0x20;
161         else if (of_device_is_compatible(dev->of_node, "calxeda,hb-xgmac")) {
162                 res = platform_get_resource(to_platform_device(dev),
163                                             IORESOURCE_MEM, 0);
164                 if (res) {
165                         if (res->start == 0xfff50000)
166                                 reg = 0;
167                         else if (res->start == 0xfff51000)
168                                 reg = 4;
169                 }
170         }
171
172         if (reg < 0)
173                 return NOTIFY_DONE;
174
175         if (of_property_read_bool(dev->of_node, "dma-coherent")) {
176                 writel(0xff31, sregs_base + reg);
177                 set_dma_ops(dev, &arm_coherent_dma_ops);
178         } else
179                 writel(0, sregs_base + reg);
180
181         return NOTIFY_OK;
182 }
183
184 static struct notifier_block highbank_amba_nb = {
185         .notifier_call = highbank_platform_notifier,
186 };
187
188 static struct notifier_block highbank_platform_nb = {
189         .notifier_call = highbank_platform_notifier,
190 };
191
192 static void __init highbank_init(void)
193 {
194         pm_power_off = highbank_power_off;
195         highbank_pm_init();
196
197         bus_register_notifier(&platform_bus_type, &highbank_platform_nb);
198         bus_register_notifier(&amba_bustype, &highbank_amba_nb);
199
200         of_platform_populate(NULL, of_default_bus_match_table, NULL, NULL);
201 }
202
203 static const char *highbank_match[] __initconst = {
204         "calxeda,highbank",
205         "calxeda,ecx-2000",
206         NULL,
207 };
208
209 DT_MACHINE_START(HIGHBANK, "Highbank")
210         .smp            = smp_ops(highbank_smp_ops),
211         .map_io         = debug_ll_io_init,
212         .init_irq       = highbank_init_irq,
213         .timer          = &highbank_timer,
214         .handle_irq     = gic_handle_irq,
215         .init_machine   = highbank_init,
216         .dt_compat      = highbank_match,
217         .restart        = highbank_restart,
218 MACHINE_END