diff options
Diffstat (limited to 'kernel/arch/arm/mach-highbank/highbank.c')
| -rw-r--r-- | kernel/arch/arm/mach-highbank/highbank.c | 189 |
1 files changed, 189 insertions, 0 deletions
diff --git a/kernel/arch/arm/mach-highbank/highbank.c b/kernel/arch/arm/mach-highbank/highbank.c new file mode 100644 index 000000000..231fba0d0 --- /dev/null +++ b/kernel/arch/arm/mach-highbank/highbank.c @@ -0,0 +1,189 @@ +/* + * Copyright 2010-2011 Calxeda, Inc. + * + * This program is free software; you can redistribute it and/or modify it + * under the terms and conditions of the GNU General Public License, + * version 2, as published by the Free Software Foundation. + * + * This program is distributed in the hope 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. + * + * You should have received a copy of the GNU General Public License along with + * this program. If not, see <http://www.gnu.org/licenses/>. + */ +#include <linux/clk.h> +#include <linux/clkdev.h> +#include <linux/clocksource.h> +#include <linux/dma-mapping.h> +#include <linux/input.h> +#include <linux/io.h> +#include <linux/irqchip.h> +#include <linux/pl320-ipc.h> +#include <linux/of.h> +#include <linux/of_irq.h> +#include <linux/of_platform.h> +#include <linux/of_address.h> +#include <linux/reboot.h> +#include <linux/amba/bus.h> +#include <linux/platform_device.h> + +#include <asm/psci.h> +#include <asm/hardware/cache-l2x0.h> +#include <asm/mach/arch.h> +#include <asm/mach/map.h> + +#include "core.h" +#include "sysregs.h" + +void __iomem *sregs_base; +void __iomem *scu_base_addr; + +static void __init highbank_scu_map_io(void) +{ + unsigned long base; + + /* Get SCU base */ + asm("mrc p15, 4, %0, c15, c0, 0" : "=r" (base)); + + scu_base_addr = ioremap(base, SZ_4K); +} + + +static void highbank_l2c310_write_sec(unsigned long val, unsigned reg) +{ + if (reg == L2X0_CTRL) + highbank_smc1(0x102, val); + else + WARN_ONCE(1, "Highbank L2C310: ignoring write to reg 0x%x\n", + reg); +} + +static void __init highbank_init_irq(void) +{ + irqchip_init(); + + if (of_find_compatible_node(NULL, NULL, "arm,cortex-a9")) + highbank_scu_map_io(); +} + +static void highbank_power_off(void) +{ + highbank_set_pwr_shutdown(); + + while (1) + cpu_do_idle(); +} + +static int highbank_platform_notifier(struct notifier_block *nb, + unsigned long event, void *__dev) +{ + struct resource *res; + int reg = -1; + u32 val; + struct device *dev = __dev; + + if (event != BUS_NOTIFY_ADD_DEVICE) + return NOTIFY_DONE; + + if (of_device_is_compatible(dev->of_node, "calxeda,hb-ahci")) + reg = 0xc; + else if (of_device_is_compatible(dev->of_node, "calxeda,hb-sdhci")) + reg = 0x18; + else if (of_device_is_compatible(dev->of_node, "arm,pl330")) + reg = 0x20; + else if (of_device_is_compatible(dev->of_node, "calxeda,hb-xgmac")) { + res = platform_get_resource(to_platform_device(dev), + IORESOURCE_MEM, 0); + if (res) { + if (res->start == 0xfff50000) + reg = 0; + else if (res->start == 0xfff51000) + reg = 4; + } + } + + if (reg < 0) + return NOTIFY_DONE; + + if (of_property_read_bool(dev->of_node, "dma-coherent")) { + val = readl(sregs_base + reg); + writel(val | 0xff01, sregs_base + reg); + set_dma_ops(dev, &arm_coherent_dma_ops); + } + + return NOTIFY_OK; +} + +static struct notifier_block highbank_amba_nb = { + .notifier_call = highbank_platform_notifier, +}; + +static struct notifier_block highbank_platform_nb = { + .notifier_call = highbank_platform_notifier, +}; + +static struct platform_device highbank_cpuidle_device = { + .name = "cpuidle-calxeda", +}; + +static int hb_keys_notifier(struct notifier_block *nb, unsigned long event, void *data) +{ + u32 key = *(u32 *)data; + + if (event != 0x1000) + return 0; + + if (key == KEY_POWER) + orderly_poweroff(false); + else if (key == 0xffff) + ctrl_alt_del(); + + return 0; +} +static struct notifier_block hb_keys_nb = { + .notifier_call = hb_keys_notifier, +}; + +static void __init highbank_init(void) +{ + struct device_node *np; + + /* Map system registers */ + np = of_find_compatible_node(NULL, NULL, "calxeda,hb-sregs"); + sregs_base = of_iomap(np, 0); + WARN_ON(!sregs_base); + + pm_power_off = highbank_power_off; + highbank_pm_init(); + + bus_register_notifier(&platform_bus_type, &highbank_platform_nb); + bus_register_notifier(&amba_bustype, &highbank_amba_nb); + + pl320_ipc_register_notifier(&hb_keys_nb); + + of_platform_populate(NULL, of_default_bus_match_table, NULL, NULL); + + if (psci_ops.cpu_suspend) + platform_device_register(&highbank_cpuidle_device); +} + +static const char *const highbank_match[] __initconst = { + "calxeda,highbank", + "calxeda,ecx-2000", + NULL, +}; + +DT_MACHINE_START(HIGHBANK, "Highbank") +#if defined(CONFIG_ZONE_DMA) && defined(CONFIG_ARM_LPAE) + .dma_zone_size = (4ULL * SZ_1G), +#endif + .l2c_aux_val = 0, + .l2c_aux_mask = ~0, + .l2c_write_sec = highbank_l2c310_write_sec, + .init_irq = highbank_init_irq, + .init_machine = highbank_init, + .dt_compat = highbank_match, + .restart = highbank_restart, +MACHINE_END |