diff options
Diffstat (limited to 'arch/arm/mach-tegra/flowctrl.c')
| -rw-r--r-- | arch/arm/mach-tegra/flowctrl.c | 171 |
1 files changed, 0 insertions, 171 deletions
diff --git a/arch/arm/mach-tegra/flowctrl.c b/arch/arm/mach-tegra/flowctrl.c deleted file mode 100644 index 475e783992fd..000000000000 --- a/arch/arm/mach-tegra/flowctrl.c +++ /dev/null @@ -1,171 +0,0 @@ -/* - * arch/arm/mach-tegra/flowctrl.c - * - * functions and macros to control the flowcontroller - * - * Copyright (c) 2010-2012, NVIDIA Corporation. All rights reserved. - * - * 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 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. - * - * 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/cpumask.h> -#include <linux/init.h> -#include <linux/io.h> -#include <linux/kernel.h> -#include <linux/of.h> -#include <linux/of_address.h> - -#include <soc/tegra/fuse.h> - -#include "flowctrl.h" - -static u8 flowctrl_offset_halt_cpu[] = { - FLOW_CTRL_HALT_CPU0_EVENTS, - FLOW_CTRL_HALT_CPU1_EVENTS, - FLOW_CTRL_HALT_CPU1_EVENTS + 8, - FLOW_CTRL_HALT_CPU1_EVENTS + 16, -}; - -static u8 flowctrl_offset_cpu_csr[] = { - FLOW_CTRL_CPU0_CSR, - FLOW_CTRL_CPU1_CSR, - FLOW_CTRL_CPU1_CSR + 8, - FLOW_CTRL_CPU1_CSR + 16, -}; - -static void __iomem *tegra_flowctrl_base; - -static void flowctrl_update(u8 offset, u32 value) -{ - writel(value, tegra_flowctrl_base + offset); - - /* ensure the update has reached the flow controller */ - wmb(); - readl_relaxed(tegra_flowctrl_base + offset); -} - -u32 flowctrl_read_cpu_csr(unsigned int cpuid) -{ - u8 offset = flowctrl_offset_cpu_csr[cpuid]; - - return readl(tegra_flowctrl_base + offset); -} - -void flowctrl_write_cpu_csr(unsigned int cpuid, u32 value) -{ - return flowctrl_update(flowctrl_offset_cpu_csr[cpuid], value); -} - -void flowctrl_write_cpu_halt(unsigned int cpuid, u32 value) -{ - return flowctrl_update(flowctrl_offset_halt_cpu[cpuid], value); -} - -void flowctrl_cpu_suspend_enter(unsigned int cpuid) -{ - unsigned int reg; - int i; - - reg = flowctrl_read_cpu_csr(cpuid); - switch (tegra_get_chip_id()) { - case TEGRA20: - /* clear wfe bitmap */ - reg &= ~TEGRA20_FLOW_CTRL_CSR_WFE_BITMAP; - /* clear wfi bitmap */ - reg &= ~TEGRA20_FLOW_CTRL_CSR_WFI_BITMAP; - /* pwr gating on wfe */ - reg |= TEGRA20_FLOW_CTRL_CSR_WFE_CPU0 << cpuid; - break; - case TEGRA30: - case TEGRA114: - case TEGRA124: - /* clear wfe bitmap */ - reg &= ~TEGRA30_FLOW_CTRL_CSR_WFE_BITMAP; - /* clear wfi bitmap */ - reg &= ~TEGRA30_FLOW_CTRL_CSR_WFI_BITMAP; - /* pwr gating on wfi */ - reg |= TEGRA30_FLOW_CTRL_CSR_WFI_CPU0 << cpuid; - break; - } - reg |= FLOW_CTRL_CSR_INTR_FLAG; /* clear intr flag */ - reg |= FLOW_CTRL_CSR_EVENT_FLAG; /* clear event flag */ - reg |= FLOW_CTRL_CSR_ENABLE; /* pwr gating */ - flowctrl_write_cpu_csr(cpuid, reg); - - for (i = 0; i < num_possible_cpus(); i++) { - if (i == cpuid) - continue; - reg = flowctrl_read_cpu_csr(i); - reg |= FLOW_CTRL_CSR_EVENT_FLAG; - reg |= FLOW_CTRL_CSR_INTR_FLAG; - flowctrl_write_cpu_csr(i, reg); - } -} - -void flowctrl_cpu_suspend_exit(unsigned int cpuid) -{ - unsigned int reg; - - /* Disable powergating via flow controller for CPU0 */ - reg = flowctrl_read_cpu_csr(cpuid); - switch (tegra_get_chip_id()) { - case TEGRA20: - /* clear wfe bitmap */ - reg &= ~TEGRA20_FLOW_CTRL_CSR_WFE_BITMAP; - /* clear wfi bitmap */ - reg &= ~TEGRA20_FLOW_CTRL_CSR_WFI_BITMAP; - break; - case TEGRA30: - case TEGRA114: - case TEGRA124: - /* clear wfe bitmap */ - reg &= ~TEGRA30_FLOW_CTRL_CSR_WFE_BITMAP; - /* clear wfi bitmap */ - reg &= ~TEGRA30_FLOW_CTRL_CSR_WFI_BITMAP; - break; - } - reg &= ~FLOW_CTRL_CSR_ENABLE; /* clear enable */ - reg |= FLOW_CTRL_CSR_INTR_FLAG; /* clear intr */ - reg |= FLOW_CTRL_CSR_EVENT_FLAG; /* clear event */ - flowctrl_write_cpu_csr(cpuid, reg); -} - -static const struct of_device_id matches[] __initconst = { - { .compatible = "nvidia,tegra124-flowctrl" }, - { .compatible = "nvidia,tegra114-flowctrl" }, - { .compatible = "nvidia,tegra30-flowctrl" }, - { .compatible = "nvidia,tegra20-flowctrl" }, - { } -}; - -void __init tegra_flowctrl_init(void) -{ - /* hardcoded fallback if device tree node is missing */ - unsigned long base = 0x60007000; - unsigned long size = SZ_4K; - struct device_node *np; - - np = of_find_matching_node(NULL, matches); - if (np) { - struct resource res; - - if (of_address_to_resource(np, 0, &res) == 0) { - size = resource_size(&res); - base = res.start; - } - - of_node_put(np); - } - - tegra_flowctrl_base = ioremap_nocache(base, size); -} |