123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137138139140141142143144145146147148149150151152153154155156157158159160161162163164165166167168169170171172173174175176177178179180181182183184185186187188189190191192193194195196197198199200201202203204205206207 |
- /*
- * This file contains common code that is intended to be used across
- * boards so that it's not replicated.
- *
- * Copyright (C) 2011 Xilinx
- *
- * This software is licensed under the terms of the GNU General Public
- * License version 2, as published by the Free Software Foundation, and
- * may be copied, distributed, and modified under those terms.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- */
- #include <linux/init.h>
- #include <linux/kernel.h>
- #include <linux/cpumask.h>
- #include <linux/platform_device.h>
- #include <linux/clk.h>
- #include <linux/clk-provider.h>
- #include <linux/clk/zynq.h>
- #include <linux/clocksource.h>
- #include <linux/of_address.h>
- #include <linux/of_irq.h>
- #include <linux/of_platform.h>
- #include <linux/of.h>
- #include <linux/memblock.h>
- #include <linux/irqchip.h>
- #include <linux/irqchip/arm-gic.h>
- #include <linux/slab.h>
- #include <linux/sys_soc.h>
- #include <asm/mach/arch.h>
- #include <asm/mach/map.h>
- #include <asm/mach/time.h>
- #include <asm/mach-types.h>
- #include <asm/page.h>
- #include <asm/pgtable.h>
- #include <asm/smp_scu.h>
- #include <asm/system_info.h>
- #include <asm/hardware/cache-l2x0.h>
- #include "common.h"
- #define ZYNQ_DEVCFG_MCTRL 0x80
- #define ZYNQ_DEVCFG_PS_VERSION_SHIFT 28
- #define ZYNQ_DEVCFG_PS_VERSION_MASK 0xF
- void __iomem *zynq_scu_base;
- /**
- * zynq_memory_init - Initialize special memory
- *
- * We need to stop things allocating the low memory as DMA can't work in
- * the 1st 512K of memory.
- */
- static void __init zynq_memory_init(void)
- {
- if (!__pa(PAGE_OFFSET))
- memblock_reserve(__pa(PAGE_OFFSET), 0x80000);
- }
- static struct platform_device zynq_cpuidle_device = {
- .name = "cpuidle-zynq",
- };
- /**
- * zynq_get_revision - Get Zynq silicon revision
- *
- * Return: Silicon version or -1 otherwise
- */
- static int __init zynq_get_revision(void)
- {
- struct device_node *np;
- void __iomem *zynq_devcfg_base;
- u32 revision;
- np = of_find_compatible_node(NULL, NULL, "xlnx,zynq-devcfg-1.0");
- if (!np) {
- pr_err("%s: no devcfg node found\n", __func__);
- return -1;
- }
- zynq_devcfg_base = of_iomap(np, 0);
- if (!zynq_devcfg_base) {
- pr_err("%s: Unable to map I/O memory\n", __func__);
- return -1;
- }
- revision = readl(zynq_devcfg_base + ZYNQ_DEVCFG_MCTRL);
- revision >>= ZYNQ_DEVCFG_PS_VERSION_SHIFT;
- revision &= ZYNQ_DEVCFG_PS_VERSION_MASK;
- iounmap(zynq_devcfg_base);
- return revision;
- }
- static void __init zynq_init_late(void)
- {
- zynq_core_pm_init();
- zynq_pm_late_init();
- }
- /**
- * zynq_init_machine - System specific initialization, intended to be
- * called from board specific initialization.
- */
- static void __init zynq_init_machine(void)
- {
- struct soc_device_attribute *soc_dev_attr;
- struct soc_device *soc_dev;
- struct device *parent = NULL;
- soc_dev_attr = kzalloc(sizeof(*soc_dev_attr), GFP_KERNEL);
- if (!soc_dev_attr)
- goto out;
- system_rev = zynq_get_revision();
- soc_dev_attr->family = kasprintf(GFP_KERNEL, "Xilinx Zynq");
- soc_dev_attr->revision = kasprintf(GFP_KERNEL, "0x%x", system_rev);
- soc_dev_attr->soc_id = kasprintf(GFP_KERNEL, "0x%x",
- zynq_slcr_get_device_id());
- soc_dev = soc_device_register(soc_dev_attr);
- if (IS_ERR(soc_dev)) {
- kfree(soc_dev_attr->family);
- kfree(soc_dev_attr->revision);
- kfree(soc_dev_attr->soc_id);
- kfree(soc_dev_attr);
- goto out;
- }
- parent = soc_device_to_device(soc_dev);
- out:
- /*
- * Finished with the static registrations now; fill in the missing
- * devices
- */
- of_platform_default_populate(NULL, NULL, parent);
- platform_device_register(&zynq_cpuidle_device);
- }
- static void __init zynq_timer_init(void)
- {
- zynq_clock_init();
- of_clk_init(NULL);
- timer_probe();
- }
- static struct map_desc zynq_cortex_a9_scu_map __initdata = {
- .length = SZ_256,
- .type = MT_DEVICE,
- };
- static void __init zynq_scu_map_io(void)
- {
- unsigned long base;
- base = scu_a9_get_base();
- zynq_cortex_a9_scu_map.pfn = __phys_to_pfn(base);
- /* Expected address is in vmalloc area that's why simple assign here */
- zynq_cortex_a9_scu_map.virtual = base;
- iotable_init(&zynq_cortex_a9_scu_map, 1);
- zynq_scu_base = (void __iomem *)base;
- BUG_ON(!zynq_scu_base);
- }
- /**
- * zynq_map_io - Create memory mappings needed for early I/O.
- */
- static void __init zynq_map_io(void)
- {
- debug_ll_io_init();
- zynq_scu_map_io();
- }
- static void __init zynq_irq_init(void)
- {
- zynq_early_slcr_init();
- irqchip_init();
- }
- static const char * const zynq_dt_match[] = {
- "xlnx,zynq-7000",
- NULL
- };
- DT_MACHINE_START(XILINX_EP107, "Xilinx Zynq Platform")
- /* 64KB way size, 8-way associativity, parity disabled */
- .l2c_aux_val = 0x00400000,
- .l2c_aux_mask = 0xffbfffff,
- .smp = smp_ops(zynq_smp_ops),
- .map_io = zynq_map_io,
- .init_irq = zynq_irq_init,
- .init_machine = zynq_init_machine,
- .init_late = zynq_init_late,
- .init_time = zynq_timer_init,
- .dt_compat = zynq_dt_match,
- .reserve = zynq_memory_init,
- MACHINE_END
|