Merge tag 'clk-for-linus' of git://git.linaro.org/people/mturquette/linux
[~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 #include <linux/clk-provider.h>
29
30 #include <asm/arch_timer.h>
31 #include <asm/cacheflush.h>
32 #include <asm/cputype.h>
33 #include <asm/smp_plat.h>
34 #include <asm/smp_twd.h>
35 #include <asm/hardware/arm_timer.h>
36 #include <asm/hardware/timer-sp.h>
37 #include <asm/hardware/gic.h>
38 #include <asm/hardware/cache-l2x0.h>
39 #include <asm/mach/arch.h>
40 #include <asm/mach/map.h>
41 #include <asm/mach/time.h>
42
43 #include "core.h"
44 #include "sysregs.h"
45
46 void __iomem *sregs_base;
47 void __iomem *scu_base_addr;
48
49 static void __init highbank_scu_map_io(void)
50 {
51         unsigned long base;
52
53         /* Get SCU base */
54         asm("mrc p15, 4, %0, c15, c0, 0" : "=r" (base));
55
56         scu_base_addr = ioremap(base, SZ_4K);
57 }
58
59 #define HB_JUMP_TABLE_PHYS(cpu)         (0x40 + (0x10 * (cpu)))
60 #define HB_JUMP_TABLE_VIRT(cpu)         phys_to_virt(HB_JUMP_TABLE_PHYS(cpu))
61
62 void highbank_set_cpu_jump(int cpu, void *jump_addr)
63 {
64         cpu = MPIDR_AFFINITY_LEVEL(cpu_logical_map(cpu), 0);
65         writel(virt_to_phys(jump_addr), HB_JUMP_TABLE_VIRT(cpu));
66         __cpuc_flush_dcache_area(HB_JUMP_TABLE_VIRT(cpu), 16);
67         outer_clean_range(HB_JUMP_TABLE_PHYS(cpu),
68                           HB_JUMP_TABLE_PHYS(cpu) + 15);
69 }
70
71 const static struct of_device_id irq_match[] = {
72         { .compatible = "arm,cortex-a15-gic", .data = gic_of_init, },
73         { .compatible = "arm,cortex-a9-gic", .data = gic_of_init, },
74         {}
75 };
76
77 #ifdef CONFIG_CACHE_L2X0
78 static void highbank_l2x0_disable(void)
79 {
80         /* Disable PL310 L2 Cache controller */
81         highbank_smc1(0x102, 0x0);
82 }
83 #endif
84
85 static void __init highbank_init_irq(void)
86 {
87         of_irq_init(irq_match);
88
89         if (of_find_compatible_node(NULL, NULL, "arm,cortex-a9"))
90                 highbank_scu_map_io();
91
92 #ifdef CONFIG_CACHE_L2X0
93         /* Enable PL310 L2 Cache controller */
94         highbank_smc1(0x102, 0x1);
95         l2x0_of_init(0, ~0UL);
96         outer_cache.disable = highbank_l2x0_disable;
97 #endif
98 }
99
100 static struct clk_lookup lookup = {
101         .dev_id = "sp804",
102         .con_id = NULL,
103 };
104
105 static void __init highbank_timer_init(void)
106 {
107         int irq;
108         struct device_node *np;
109         void __iomem *timer_base;
110
111         /* Map system registers */
112         np = of_find_compatible_node(NULL, NULL, "calxeda,hb-sregs");
113         sregs_base = of_iomap(np, 0);
114         WARN_ON(!sregs_base);
115
116         np = of_find_compatible_node(NULL, NULL, "arm,sp804");
117         timer_base = of_iomap(np, 0);
118         WARN_ON(!timer_base);
119         irq = irq_of_parse_and_map(np, 0);
120
121         of_clk_init(NULL);
122         lookup.clk = of_clk_get(np, 0);
123         clkdev_add(&lookup);
124
125         sp804_clocksource_and_sched_clock_init(timer_base + 0x20, "timer1");
126         sp804_clockevents_init(timer_base, irq, "timer0");
127
128         twd_local_timer_of_register();
129
130         arch_timer_of_register();
131         arch_timer_sched_clock_init();
132 }
133
134 static struct sys_timer highbank_timer = {
135         .init = highbank_timer_init,
136 };
137
138 static void highbank_power_off(void)
139 {
140         highbank_set_pwr_shutdown();
141
142         while (1)
143                 cpu_do_idle();
144 }
145
146 static int highbank_platform_notifier(struct notifier_block *nb,
147                                   unsigned long event, void *__dev)
148 {
149         struct resource *res;
150         int reg = -1;
151         struct device *dev = __dev;
152
153         if (event != BUS_NOTIFY_ADD_DEVICE)
154                 return NOTIFY_DONE;
155
156         if (of_device_is_compatible(dev->of_node, "calxeda,hb-ahci"))
157                 reg = 0xc;
158         else if (of_device_is_compatible(dev->of_node, "calxeda,hb-sdhci"))
159                 reg = 0x18;
160         else if (of_device_is_compatible(dev->of_node, "arm,pl330"))
161                 reg = 0x20;
162         else if (of_device_is_compatible(dev->of_node, "calxeda,hb-xgmac")) {
163                 res = platform_get_resource(to_platform_device(dev),
164                                             IORESOURCE_MEM, 0);
165                 if (res) {
166                         if (res->start == 0xfff50000)
167                                 reg = 0;
168                         else if (res->start == 0xfff51000)
169                                 reg = 4;
170                 }
171         }
172
173         if (reg < 0)
174                 return NOTIFY_DONE;
175
176         if (of_property_read_bool(dev->of_node, "dma-coherent")) {
177                 writel(0xff31, sregs_base + reg);
178                 set_dma_ops(dev, &arm_coherent_dma_ops);
179         } else
180                 writel(0, sregs_base + reg);
181
182         return NOTIFY_OK;
183 }
184
185 static struct notifier_block highbank_amba_nb = {
186         .notifier_call = highbank_platform_notifier,
187 };
188
189 static struct notifier_block highbank_platform_nb = {
190         .notifier_call = highbank_platform_notifier,
191 };
192
193 static void __init highbank_init(void)
194 {
195         pm_power_off = highbank_power_off;
196         highbank_pm_init();
197
198         bus_register_notifier(&platform_bus_type, &highbank_platform_nb);
199         bus_register_notifier(&amba_bustype, &highbank_amba_nb);
200
201         of_platform_populate(NULL, of_default_bus_match_table, NULL, NULL);
202 }
203
204 static const char *highbank_match[] __initconst = {
205         "calxeda,highbank",
206         "calxeda,ecx-2000",
207         NULL,
208 };
209
210 DT_MACHINE_START(HIGHBANK, "Highbank")
211         .smp            = smp_ops(highbank_smp_ops),
212         .map_io         = debug_ll_io_init,
213         .init_irq       = highbank_init_irq,
214         .timer          = &highbank_timer,
215         .handle_irq     = gic_handle_irq,
216         .init_machine   = highbank_init,
217         .dt_compat      = highbank_match,
218         .restart        = highbank_restart,
219 MACHINE_END