1220e6cf7SRob Herring /* 2220e6cf7SRob Herring * Copyright 2010-2011 Calxeda, Inc. 3220e6cf7SRob Herring * 4220e6cf7SRob Herring * This program is free software; you can redistribute it and/or modify it 5220e6cf7SRob Herring * under the terms and conditions of the GNU General Public License, 6220e6cf7SRob Herring * version 2, as published by the Free Software Foundation. 7220e6cf7SRob Herring * 8220e6cf7SRob Herring * This program is distributed in the hope it will be useful, but WITHOUT 9220e6cf7SRob Herring * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 10220e6cf7SRob Herring * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for 11220e6cf7SRob Herring * more details. 12220e6cf7SRob Herring * 13220e6cf7SRob Herring * You should have received a copy of the GNU General Public License along with 14220e6cf7SRob Herring * this program. If not, see <http://www.gnu.org/licenses/>. 15220e6cf7SRob Herring */ 16220e6cf7SRob Herring #include <linux/clk.h> 17220e6cf7SRob Herring #include <linux/clkdev.h> 180583fe47SRob Herring #include <linux/clocksource.h> 191dc737c4SRob Herring #include <linux/dma-mapping.h> 20220e6cf7SRob Herring #include <linux/io.h> 210529e315SRob Herring #include <linux/irqchip.h> 22220e6cf7SRob Herring #include <linux/of.h> 23220e6cf7SRob Herring #include <linux/of_irq.h> 24220e6cf7SRob Herring #include <linux/of_platform.h> 25220e6cf7SRob Herring #include <linux/of_address.h> 261dc737c4SRob Herring #include <linux/amba/bus.h> 27d34bcdebSPrashant Gaikwad #include <linux/clk-provider.h> 2860a66e37SDaniel Lezcano #include <linux/platform_device.h> 29220e6cf7SRob Herring 30220e6cf7SRob Herring #include <asm/cacheflush.h> 3163fc1370SRob Herring #include <asm/cputype.h> 32eb50439bSWill Deacon #include <asm/smp_plat.h> 33220e6cf7SRob Herring #include <asm/hardware/cache-l2x0.h> 34220e6cf7SRob Herring #include <asm/mach/arch.h> 3552530343SRob Herring #include <asm/mach/map.h> 36220e6cf7SRob Herring 37220e6cf7SRob Herring #include "core.h" 38220e6cf7SRob Herring #include "sysregs.h" 39220e6cf7SRob Herring 40220e6cf7SRob Herring void __iomem *sregs_base; 417a2848d3SRob Herring void __iomem *scu_base_addr; 42220e6cf7SRob Herring 43220e6cf7SRob Herring static void __init highbank_scu_map_io(void) 44220e6cf7SRob Herring { 45220e6cf7SRob Herring unsigned long base; 46220e6cf7SRob Herring 47220e6cf7SRob Herring /* Get SCU base */ 48220e6cf7SRob Herring asm("mrc p15, 4, %0, c15, c0, 0" : "=r" (base)); 49220e6cf7SRob Herring 507a2848d3SRob Herring scu_base_addr = ioremap(base, SZ_4K); 51220e6cf7SRob Herring } 52220e6cf7SRob Herring 53220e6cf7SRob Herring #define HB_JUMP_TABLE_PHYS(cpu) (0x40 + (0x10 * (cpu))) 54220e6cf7SRob Herring #define HB_JUMP_TABLE_VIRT(cpu) phys_to_virt(HB_JUMP_TABLE_PHYS(cpu)) 55220e6cf7SRob Herring 56220e6cf7SRob Herring void highbank_set_cpu_jump(int cpu, void *jump_addr) 57220e6cf7SRob Herring { 5863fc1370SRob Herring cpu = MPIDR_AFFINITY_LEVEL(cpu_logical_map(cpu), 0); 59adf55f7fSRob Herring writel(virt_to_phys(jump_addr), HB_JUMP_TABLE_VIRT(cpu)); 60220e6cf7SRob Herring __cpuc_flush_dcache_area(HB_JUMP_TABLE_VIRT(cpu), 16); 61220e6cf7SRob Herring outer_clean_range(HB_JUMP_TABLE_PHYS(cpu), 62220e6cf7SRob Herring HB_JUMP_TABLE_PHYS(cpu) + 15); 63220e6cf7SRob Herring } 64220e6cf7SRob Herring 658e56130dSRob Herring static void highbank_l2x0_disable(void) 668e56130dSRob Herring { 678e56130dSRob Herring /* Disable PL310 L2 Cache controller */ 688e56130dSRob Herring highbank_smc1(0x102, 0x0); 698e56130dSRob Herring } 708e56130dSRob Herring 71220e6cf7SRob Herring static void __init highbank_init_irq(void) 72220e6cf7SRob Herring { 730529e315SRob Herring irqchip_init(); 748e56130dSRob Herring 757a2848d3SRob Herring if (of_find_compatible_node(NULL, NULL, "arm,cortex-a9")) 767a2848d3SRob Herring highbank_scu_map_io(); 777a2848d3SRob Herring 788e56130dSRob Herring /* Enable PL310 L2 Cache controller */ 79a56a5cf1SRob Herring if (IS_ENABLED(CONFIG_CACHE_L2X0) && 80a56a5cf1SRob Herring of_find_compatible_node(NULL, NULL, "arm,pl310-cache")) { 818e56130dSRob Herring highbank_smc1(0x102, 0x1); 82220e6cf7SRob Herring l2x0_of_init(0, ~0UL); 838e56130dSRob Herring outer_cache.disable = highbank_l2x0_disable; 84a56a5cf1SRob Herring } 85220e6cf7SRob Herring } 86220e6cf7SRob Herring 87220e6cf7SRob Herring static void __init highbank_timer_init(void) 88220e6cf7SRob Herring { 89220e6cf7SRob Herring struct device_node *np; 90220e6cf7SRob Herring 91220e6cf7SRob Herring /* Map system registers */ 92220e6cf7SRob Herring np = of_find_compatible_node(NULL, NULL, "calxeda,hb-sregs"); 93220e6cf7SRob Herring sregs_base = of_iomap(np, 0); 94220e6cf7SRob Herring WARN_ON(!sregs_base); 95220e6cf7SRob Herring 96d34bcdebSPrashant Gaikwad of_clk_init(NULL); 977ac9b9ebSMarc Zyngier 98da4a686aSRob Herring clocksource_of_init(); 99220e6cf7SRob Herring } 100220e6cf7SRob Herring 101220e6cf7SRob Herring static void highbank_power_off(void) 102220e6cf7SRob Herring { 103c05ee88fSRob Herring highbank_set_pwr_shutdown(); 104220e6cf7SRob Herring 105220e6cf7SRob Herring while (1) 106220e6cf7SRob Herring cpu_do_idle(); 107220e6cf7SRob Herring } 108220e6cf7SRob Herring 1091dc737c4SRob Herring static int highbank_platform_notifier(struct notifier_block *nb, 1101dc737c4SRob Herring unsigned long event, void *__dev) 1111dc737c4SRob Herring { 1121dc737c4SRob Herring struct resource *res; 1131dc737c4SRob Herring int reg = -1; 114e64bf95eSRob Herring u32 val; 1151dc737c4SRob Herring struct device *dev = __dev; 1161dc737c4SRob Herring 1171dc737c4SRob Herring if (event != BUS_NOTIFY_ADD_DEVICE) 1181dc737c4SRob Herring return NOTIFY_DONE; 1191dc737c4SRob Herring 1201dc737c4SRob Herring if (of_device_is_compatible(dev->of_node, "calxeda,hb-ahci")) 1211dc737c4SRob Herring reg = 0xc; 1221dc737c4SRob Herring else if (of_device_is_compatible(dev->of_node, "calxeda,hb-sdhci")) 1231dc737c4SRob Herring reg = 0x18; 1241dc737c4SRob Herring else if (of_device_is_compatible(dev->of_node, "arm,pl330")) 1251dc737c4SRob Herring reg = 0x20; 1261dc737c4SRob Herring else if (of_device_is_compatible(dev->of_node, "calxeda,hb-xgmac")) { 1271dc737c4SRob Herring res = platform_get_resource(to_platform_device(dev), 1281dc737c4SRob Herring IORESOURCE_MEM, 0); 1291dc737c4SRob Herring if (res) { 1301dc737c4SRob Herring if (res->start == 0xfff50000) 1311dc737c4SRob Herring reg = 0; 1321dc737c4SRob Herring else if (res->start == 0xfff51000) 1331dc737c4SRob Herring reg = 4; 1341dc737c4SRob Herring } 1351dc737c4SRob Herring } 1361dc737c4SRob Herring 1371dc737c4SRob Herring if (reg < 0) 1381dc737c4SRob Herring return NOTIFY_DONE; 1391dc737c4SRob Herring 1401dc737c4SRob Herring if (of_property_read_bool(dev->of_node, "dma-coherent")) { 141e64bf95eSRob Herring val = readl(sregs_base + reg); 142e64bf95eSRob Herring writel(val | 0xff01, sregs_base + reg); 1431dc737c4SRob Herring set_dma_ops(dev, &arm_coherent_dma_ops); 144e64bf95eSRob Herring } 1451dc737c4SRob Herring 1461dc737c4SRob Herring return NOTIFY_OK; 1471dc737c4SRob Herring } 1481dc737c4SRob Herring 1491dc737c4SRob Herring static struct notifier_block highbank_amba_nb = { 1501dc737c4SRob Herring .notifier_call = highbank_platform_notifier, 1511dc737c4SRob Herring }; 1521dc737c4SRob Herring 1531dc737c4SRob Herring static struct notifier_block highbank_platform_nb = { 1541dc737c4SRob Herring .notifier_call = highbank_platform_notifier, 1551dc737c4SRob Herring }; 1561dc737c4SRob Herring 15760a66e37SDaniel Lezcano static struct platform_device highbank_cpuidle_device = { 15860a66e37SDaniel Lezcano .name = "cpuidle-calxeda", 15960a66e37SDaniel Lezcano }; 16060a66e37SDaniel Lezcano 161220e6cf7SRob Herring static void __init highbank_init(void) 162220e6cf7SRob Herring { 163220e6cf7SRob Herring pm_power_off = highbank_power_off; 164a283580cSRob Herring highbank_pm_init(); 165220e6cf7SRob Herring 1661dc737c4SRob Herring bus_register_notifier(&platform_bus_type, &highbank_platform_nb); 1671dc737c4SRob Herring bus_register_notifier(&amba_bustype, &highbank_amba_nb); 1681dc737c4SRob Herring 169220e6cf7SRob Herring of_platform_populate(NULL, of_default_bus_match_table, NULL, NULL); 17060a66e37SDaniel Lezcano 17160a66e37SDaniel Lezcano if (of_machine_is_compatible("calxeda,highbank")) 17260a66e37SDaniel Lezcano platform_device_register(&highbank_cpuidle_device); 173220e6cf7SRob Herring } 174220e6cf7SRob Herring 175220e6cf7SRob Herring static const char *highbank_match[] __initconst = { 176220e6cf7SRob Herring "calxeda,highbank", 177e095c0d1SRob Herring "calxeda,ecx-2000", 178220e6cf7SRob Herring NULL, 179220e6cf7SRob Herring }; 180220e6cf7SRob Herring 181220e6cf7SRob Herring DT_MACHINE_START(HIGHBANK, "Highbank") 182a6a39834SRob Herring #if defined(CONFIG_ZONE_DMA) && defined(CONFIG_ARM_LPAE) 183a6a39834SRob Herring .dma_zone_size = (4ULL * SZ_1G), 184a6a39834SRob Herring #endif 1857ad71b61SMarc Zyngier .smp = smp_ops(highbank_smp_ops), 186220e6cf7SRob Herring .init_irq = highbank_init_irq, 1876bb27d73SStephen Warren .init_time = highbank_timer_init, 188220e6cf7SRob Herring .init_machine = highbank_init, 189220e6cf7SRob Herring .dt_compat = highbank_match, 19000e9967eSRussell King .restart = highbank_restart, 191220e6cf7SRob Herring MACHINE_END 192