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/cacheflush.h> 30 #include <asm/smp_plat.h> 31 #include <asm/smp_scu.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 46 #define HB_SCU_VIRT_BASE 0xfee00000 47 void __iomem *scu_base_addr = ((void __iomem *)(HB_SCU_VIRT_BASE)); 48 49 static struct map_desc scu_io_desc __initdata = { 50 .virtual = HB_SCU_VIRT_BASE, 51 .pfn = 0, /* run-time */ 52 .length = SZ_4K, 53 .type = MT_DEVICE, 54 }; 55 56 static void __init highbank_scu_map_io(void) 57 { 58 unsigned long base; 59 60 /* Get SCU base */ 61 asm("mrc p15, 4, %0, c15, c0, 0" : "=r" (base)); 62 63 scu_io_desc.pfn = __phys_to_pfn(base); 64 iotable_init(&scu_io_desc, 1); 65 } 66 67 static void __init highbank_map_io(void) 68 { 69 highbank_scu_map_io(); 70 highbank_lluart_map_io(); 71 } 72 73 #define HB_JUMP_TABLE_PHYS(cpu) (0x40 + (0x10 * (cpu))) 74 #define HB_JUMP_TABLE_VIRT(cpu) phys_to_virt(HB_JUMP_TABLE_PHYS(cpu)) 75 76 void highbank_set_cpu_jump(int cpu, void *jump_addr) 77 { 78 cpu = cpu_logical_map(cpu); 79 writel(virt_to_phys(jump_addr), HB_JUMP_TABLE_VIRT(cpu)); 80 __cpuc_flush_dcache_area(HB_JUMP_TABLE_VIRT(cpu), 16); 81 outer_clean_range(HB_JUMP_TABLE_PHYS(cpu), 82 HB_JUMP_TABLE_PHYS(cpu) + 15); 83 } 84 85 const static struct of_device_id irq_match[] = { 86 { .compatible = "arm,cortex-a9-gic", .data = gic_of_init, }, 87 {} 88 }; 89 90 #ifdef CONFIG_CACHE_L2X0 91 static void highbank_l2x0_disable(void) 92 { 93 /* Disable PL310 L2 Cache controller */ 94 highbank_smc1(0x102, 0x0); 95 } 96 #endif 97 98 static void __init highbank_init_irq(void) 99 { 100 of_irq_init(irq_match); 101 102 #ifdef CONFIG_CACHE_L2X0 103 /* Enable PL310 L2 Cache controller */ 104 highbank_smc1(0x102, 0x1); 105 l2x0_of_init(0, ~0UL); 106 outer_cache.disable = highbank_l2x0_disable; 107 #endif 108 } 109 110 static struct clk_lookup lookup = { 111 .dev_id = "sp804", 112 .con_id = NULL, 113 }; 114 115 static void __init highbank_timer_init(void) 116 { 117 int irq; 118 struct device_node *np; 119 void __iomem *timer_base; 120 121 /* Map system registers */ 122 np = of_find_compatible_node(NULL, NULL, "calxeda,hb-sregs"); 123 sregs_base = of_iomap(np, 0); 124 WARN_ON(!sregs_base); 125 126 np = of_find_compatible_node(NULL, NULL, "arm,sp804"); 127 timer_base = of_iomap(np, 0); 128 WARN_ON(!timer_base); 129 irq = irq_of_parse_and_map(np, 0); 130 131 highbank_clocks_init(); 132 lookup.clk = of_clk_get(np, 0); 133 clkdev_add(&lookup); 134 135 sp804_clocksource_and_sched_clock_init(timer_base + 0x20, "timer1"); 136 sp804_clockevents_init(timer_base, irq, "timer0"); 137 138 twd_local_timer_of_register(); 139 } 140 141 static struct sys_timer highbank_timer = { 142 .init = highbank_timer_init, 143 }; 144 145 static void highbank_power_off(void) 146 { 147 hignbank_set_pwr_shutdown(); 148 scu_power_mode(scu_base_addr, SCU_PM_POWEROFF); 149 150 while (1) 151 cpu_do_idle(); 152 } 153 154 static int highbank_platform_notifier(struct notifier_block *nb, 155 unsigned long event, void *__dev) 156 { 157 struct resource *res; 158 int reg = -1; 159 struct device *dev = __dev; 160 161 if (event != BUS_NOTIFY_ADD_DEVICE) 162 return NOTIFY_DONE; 163 164 if (of_device_is_compatible(dev->of_node, "calxeda,hb-ahci")) 165 reg = 0xc; 166 else if (of_device_is_compatible(dev->of_node, "calxeda,hb-sdhci")) 167 reg = 0x18; 168 else if (of_device_is_compatible(dev->of_node, "arm,pl330")) 169 reg = 0x20; 170 else if (of_device_is_compatible(dev->of_node, "calxeda,hb-xgmac")) { 171 res = platform_get_resource(to_platform_device(dev), 172 IORESOURCE_MEM, 0); 173 if (res) { 174 if (res->start == 0xfff50000) 175 reg = 0; 176 else if (res->start == 0xfff51000) 177 reg = 4; 178 } 179 } 180 181 if (reg < 0) 182 return NOTIFY_DONE; 183 184 if (of_property_read_bool(dev->of_node, "dma-coherent")) { 185 writel(0xff31, sregs_base + reg); 186 set_dma_ops(dev, &arm_coherent_dma_ops); 187 } else 188 writel(0, sregs_base + reg); 189 190 return NOTIFY_OK; 191 } 192 193 static struct notifier_block highbank_amba_nb = { 194 .notifier_call = highbank_platform_notifier, 195 }; 196 197 static struct notifier_block highbank_platform_nb = { 198 .notifier_call = highbank_platform_notifier, 199 }; 200 201 static void __init highbank_init(void) 202 { 203 pm_power_off = highbank_power_off; 204 highbank_pm_init(); 205 206 bus_register_notifier(&platform_bus_type, &highbank_platform_nb); 207 bus_register_notifier(&amba_bustype, &highbank_amba_nb); 208 209 of_platform_populate(NULL, of_default_bus_match_table, NULL, NULL); 210 } 211 212 static const char *highbank_match[] __initconst = { 213 "calxeda,highbank", 214 NULL, 215 }; 216 217 DT_MACHINE_START(HIGHBANK, "Highbank") 218 .smp = smp_ops(highbank_smp_ops), 219 .map_io = highbank_map_io, 220 .init_irq = highbank_init_irq, 221 .timer = &highbank_timer, 222 .handle_irq = gic_handle_irq, 223 .init_machine = highbank_init, 224 .dt_compat = highbank_match, 225 .restart = highbank_restart, 226 MACHINE_END 227