diff options
author | Anson Huang <Anson.Huang@nxp.com> | 2019-04-12 15:11:09 +0800 |
---|---|---|
committer | Dong Aisheng <aisheng.dong@nxp.com> | 2019-11-25 16:31:30 +0800 |
commit | dc782dd284d797c5ca591b945c5a51e03698fb47 (patch) | |
tree | 4e9a98d78cfafa7f5129e9d1125392a6c2a12f52 | |
parent | a4f408b44ebcaabb775d440a241f865357fab838 (diff) |
ARM: imx: add i.MX7D bus-freq support
Add i.MX7D bus-freq support, it supports High/Low/Audio bus
mode.
Signed-off-by: Anson Huang <Anson.Huang@nxp.com>
-rw-r--r-- | arch/arm/mach-imx/Kconfig | 8 | ||||
-rw-r--r-- | arch/arm/mach-imx/Makefile | 11 | ||||
-rw-r--r-- | arch/arm/mach-imx/busfreq-imx.c | 764 | ||||
-rw-r--r-- | arch/arm/mach-imx/busfreq_ddr3.c | 310 | ||||
-rw-r--r-- | arch/arm/mach-imx/busfreq_lpddr2.c | 373 | ||||
-rw-r--r-- | arch/arm/mach-imx/common.c | 166 | ||||
-rw-r--r-- | arch/arm/mach-imx/common.h | 8 | ||||
-rw-r--r-- | arch/arm/mach-imx/ddr3_freq_imx7d.S | 586 | ||||
-rw-r--r-- | arch/arm/mach-imx/ddrc.c | 86 | ||||
-rw-r--r-- | arch/arm/mach-imx/hardware.h | 12 | ||||
-rw-r--r-- | arch/arm/mach-imx/lpddr3_freq_imx.S | 444 | ||||
-rw-r--r-- | arch/arm/mach-imx/mach-imx7d.c | 8 | ||||
-rw-r--r-- | arch/arm/mach-imx/mx7.h | 54 | ||||
-rw-r--r-- | arch/arm/mach-imx/mxc.h | 2 | ||||
-rw-r--r-- | arch/arm/mach-imx/pm-imx7.c | 148 | ||||
-rw-r--r-- | arch/arm/mach-imx/smp_wfe.S | 110 |
16 files changed, 3084 insertions, 6 deletions
diff --git a/arch/arm/mach-imx/Kconfig b/arch/arm/mach-imx/Kconfig index 593bf1519608..29b15098f26b 100644 --- a/arch/arm/mach-imx/Kconfig +++ b/arch/arm/mach-imx/Kconfig @@ -43,6 +43,13 @@ config HAVE_IMX_GPC config HAVE_IMX_MMDC bool +config HAVE_IMX_DDRC + bool + select HAVE_IMX_BUSFREQ + +config HAVE_IMX_BUSFREQ + bool + config HAVE_IMX_SRC def_bool y if SMP select ARCH_HAS_RESET_CONTROLLER @@ -546,6 +553,7 @@ config SOC_IMX7D_CA7 select HAVE_IMX_MMDC select HAVE_IMX_SRC select IMX_GPCV2 + select HAVE_IMX_DDRC config SOC_IMX7D_CM4 bool diff --git a/arch/arm/mach-imx/Makefile b/arch/arm/mach-imx/Makefile index 35ff620537e6..8703165f4d64 100644 --- a/arch/arm/mach-imx/Makefile +++ b/arch/arm/mach-imx/Makefile @@ -1,5 +1,5 @@ # SPDX-License-Identifier: GPL-2.0 -obj-y := cpu.o system.o irq-common.o +obj-y := cpu.o system.o irq-common.o common.o obj-$(CONFIG_SOC_IMX21) += mm-imx21.o @@ -72,6 +72,7 @@ obj-$(CONFIG_HAVE_IMX_ANATOP) += anatop.o obj-$(CONFIG_HAVE_IMX_GPC) += gpc.o obj-$(CONFIG_HAVE_IMX_MMDC) += mmdc.o obj-$(CONFIG_HAVE_IMX_SRC) += src.o +obj-$(CONFIG_HAVE_IMX_DDRC) += ddrc.o ifneq ($(CONFIG_SOC_IMX6)$(CONFIG_SOC_LS1021A),) AFLAGS_headsmp.o :=-Wa,-march=armv7-a obj-$(CONFIG_SMP) += headsmp.o platsmp.o @@ -82,10 +83,16 @@ obj-$(CONFIG_SOC_IMX6SL) += mach-imx6sl.o obj-$(CONFIG_SOC_IMX6SLL) += mach-imx6sl.o obj-$(CONFIG_SOC_IMX6SX) += mach-imx6sx.o obj-$(CONFIG_SOC_IMX6UL) += mach-imx6ul.o -obj-$(CONFIG_SOC_IMX7D_CA7) += mach-imx7d.o +obj-$(CONFIG_SOC_IMX7D_CA7) += mach-imx7d.o pm-imx7.o ddr3_freq_imx7d.o smp_wfe.o \ + lpddr3_freq_imx.o obj-$(CONFIG_SOC_IMX7D_CM4) += mach-imx7d-cm4.o obj-$(CONFIG_SOC_IMX7ULP) += mach-imx7ulp.o pm-imx7ulp.o +obj-y += busfreq-imx.o busfreq_ddr3.o +AFLAGS_smp_wfe.o :=-Wa,-march=armv7-a +AFLAGS_ddr3_freq_imx7d.o :=-Wa,-march=armv7-a +AFLAGS_lpddr3_freq_imx.o :=-Wa,-march=armv7-a + ifeq ($(CONFIG_SUSPEND),y) AFLAGS_suspend-imx6.o :=-Wa,-march=armv7-a obj-$(CONFIG_SOC_IMX6) += suspend-imx6.o diff --git a/arch/arm/mach-imx/busfreq-imx.c b/arch/arm/mach-imx/busfreq-imx.c new file mode 100644 index 000000000000..976ba3ca7f29 --- /dev/null +++ b/arch/arm/mach-imx/busfreq-imx.c @@ -0,0 +1,764 @@ +/* + * Copyright (C) 2011-2016 Freescale Semiconductor, Inc. All Rights Reserved. + * Copyright 2017 NXP. + * Copyright 2018 NXP. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + + * 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 <asm/cacheflush.h> +#include <asm/fncpy.h> +#include <asm/io.h> +#include <asm/mach/map.h> +#include <asm/mach-types.h> +#include <asm/tlb.h> +#include <linux/busfreq-imx.h> +#include <linux/clk.h> +#include <linux/clk-provider.h> +#include <linux/delay.h> +#include <linux/module.h> +#include <linux/mutex.h> +#include <linux/of.h> +#include <linux/of_fdt.h> +#include <linux/platform_device.h> +#include <linux/proc_fs.h> +#include <linux/reboot.h> +#include <linux/regulator/consumer.h> +#include <linux/sched.h> +#include <linux/suspend.h> +#include "hardware.h" +#include "common.h" + +#define LPAPM_CLK 24000000 +#define LOW_AUDIO_CLK 50000000 +#define HIGH_AUDIO_CLK 100000000 + +#define LOW_POWER_RUN_VOLTAGE 950000 + +#define MMDC_MDMISC_DDR_TYPE_DDR3 0 +#define MMDC_MDMISC_DDR_TYPE_LPDDR2 1 + +unsigned int ddr_med_rate; +unsigned int ddr_normal_rate; +unsigned long ddr_freq_change_total_size; +unsigned long ddr_freq_change_iram_base; +unsigned long ddr_freq_change_iram_phys; + +static int ddr_type; +static int low_bus_freq_mode; +static int audio_bus_freq_mode; +static int ultra_low_bus_freq_mode; +static int high_bus_freq_mode; +static int med_bus_freq_mode; +static int bus_freq_scaling_initialized; +static bool cancel_reduce_bus_freq; +static struct device *busfreq_dev; +static int busfreq_suspended; +static int bus_freq_scaling_is_active; +static int high_bus_count, med_bus_count, audio_bus_count, low_bus_count; +static unsigned int ddr_low_rate; +static int cur_bus_freq_mode; + +extern unsigned long iram_tlb_phys_addr; +extern int unsigned long iram_tlb_base_addr; + +/* + * Bus frequency management by Linux + */ +extern int init_mmdc_lpddr2_settings(struct platform_device *dev); +extern int init_mmdc_lpddr2_settings_mx6q(struct platform_device *dev); +extern int init_mmdc_ddr3_settings_imx6_up(struct platform_device *dev); +extern int init_mmdc_ddr3_settings_imx6_smp(struct platform_device *dev); +extern int init_ddrc_ddr_settings(struct platform_device *dev); +extern int update_ddr_freq_imx_smp(int ddr_rate); +extern int update_ddr_freq_imx6_up(int ddr_rate); +extern int update_lpddr2_freq(int ddr_rate); +extern int update_lpddr2_freq_smp(int ddr_rate); + + +/** + * @brief Functions to init and update the busfreq function of + * device and memory type + */ +static struct busfreq_func { + int (*init)(struct platform_device *dev); + int (*update)(int ddr_rate); +} busfreq_func = {NULL, NULL}; + +DEFINE_MUTEX(bus_freq_mutex); + +static struct clk *osc_clk; +static struct clk *ahb_clk; +static struct clk *axi_sel_clk; +static struct clk *dram_root; +static struct clk *dram_alt_sel; +static struct clk *dram_alt_root; +static struct clk *pfd0_392m; +static struct clk *pfd2_270m; +static struct clk *pfd1_332m; +static struct clk *pll_dram; +static struct clk *ahb_sel_clk; +static struct clk *axi_clk; + +static struct delayed_work low_bus_freq_handler; +static struct delayed_work bus_freq_daemon; + +static RAW_NOTIFIER_HEAD(busfreq_notifier_chain); + +static bool busfreq_notified_low = false; + +static int busfreq_notify(enum busfreq_event event) +{ + int ret; + + if (event == LOW_BUSFREQ_ENTER) { + WARN_ON(busfreq_notified_low); + busfreq_notified_low = true; + } else if (event == LOW_BUSFREQ_EXIT) { + WARN_ON(!busfreq_notified_low); + busfreq_notified_low = false; + } + ret = raw_notifier_call_chain(&busfreq_notifier_chain, event, NULL); + + return notifier_to_errno(ret); +} + +int register_busfreq_notifier(struct notifier_block *nb) +{ + return raw_notifier_chain_register(&busfreq_notifier_chain, nb); +} +EXPORT_SYMBOL(register_busfreq_notifier); + +int unregister_busfreq_notifier(struct notifier_block *nb) +{ + return raw_notifier_chain_unregister(&busfreq_notifier_chain, nb); +} +EXPORT_SYMBOL(unregister_busfreq_notifier); + +static void enter_lpm_imx7d(void) +{ + /* + * The AHB clock parent switch and divider change + * needs to keep previous/current parent enabled + * per design requirement, but when we switch the + * clock parent, previous AHB clock parent may be + * disabled by common clock framework, so here we + * have to make sure AHB's previous parent pfd2_270m + * is enabled during AHB set rate. + */ + clk_prepare_enable(pfd2_270m); + if (audio_bus_count) { + clk_prepare_enable(pfd0_392m); + busfreq_func.update(HIGH_AUDIO_CLK); + + clk_set_parent(dram_alt_sel, pfd0_392m); + clk_set_parent(dram_root, dram_alt_root); + if (high_bus_freq_mode) { + clk_set_parent(axi_sel_clk, osc_clk); + clk_set_parent(ahb_sel_clk, osc_clk); + clk_set_rate(ahb_clk, LPAPM_CLK); + } + clk_disable_unprepare(pfd0_392m); + audio_bus_freq_mode = 1; + low_bus_freq_mode = 0; + cur_bus_freq_mode = BUS_FREQ_AUDIO; + } else { + busfreq_func.update(LPAPM_CLK); + + clk_set_parent(dram_alt_sel, osc_clk); + clk_set_parent(dram_root, dram_alt_root); + if (high_bus_freq_mode) { + clk_set_parent(axi_sel_clk, osc_clk); + clk_set_parent(ahb_sel_clk, osc_clk); + clk_set_rate(ahb_clk, LPAPM_CLK); + } + low_bus_freq_mode = 1; + audio_bus_freq_mode = 0; + cur_bus_freq_mode = BUS_FREQ_LOW; + } + clk_disable_unprepare(pfd2_270m); +} + +static void exit_lpm_imx7d(void) +{ + clk_set_parent(axi_sel_clk, pfd1_332m); + clk_set_rate(ahb_clk, LPAPM_CLK / 2); + clk_set_parent(ahb_sel_clk, pfd2_270m); + + busfreq_func.update(ddr_normal_rate); + + clk_set_parent(dram_root, pll_dram); +} + +static void reduce_bus_freq(void) +{ + if (audio_bus_count && (low_bus_freq_mode || ultra_low_bus_freq_mode)) + busfreq_notify(LOW_BUSFREQ_EXIT); + else if (!audio_bus_count) + busfreq_notify(LOW_BUSFREQ_ENTER); + + if (cpu_is_imx7d()) + enter_lpm_imx7d(); + + med_bus_freq_mode = 0; + high_bus_freq_mode = 0; + + if (audio_bus_freq_mode) + dev_dbg(busfreq_dev, + "Bus freq set to audio mode. Count: high %d, med %d, audio %d\n", + high_bus_count, med_bus_count, audio_bus_count); + if (low_bus_freq_mode) + dev_dbg(busfreq_dev, + "Bus freq set to low mode. Count: high %d, med %d, audio %d\n", + high_bus_count, med_bus_count, audio_bus_count); +} + +static inline void cancel_low_bus_freq_handler(void) +{ + cancel_delayed_work(&low_bus_freq_handler); + cancel_reduce_bus_freq = true; +} + +static void reduce_bus_freq_handler(struct work_struct *work) +{ + mutex_lock(&bus_freq_mutex); + + if (!cancel_reduce_bus_freq) { + reduce_bus_freq(); + cancel_low_bus_freq_handler(); + } + + mutex_unlock(&bus_freq_mutex); +} + +/* + * Set the DDR, AHB to 24MHz. + * This mode will be activated only when none of the modules that + * need a higher DDR or AHB frequency are active. + */ +static int set_low_bus_freq(void) +{ + if (busfreq_suspended) + return 0; + + if (!bus_freq_scaling_initialized || !bus_freq_scaling_is_active) + return 0; + + cancel_reduce_bus_freq = false; + + /* + * Check to see if we need to got from + * low bus freq mode to audio bus freq mode. + * If so, the change needs to be done immediately. + */ + if (audio_bus_count && (low_bus_freq_mode || ultra_low_bus_freq_mode)) + reduce_bus_freq(); + else + /* + * Don't lower the frequency immediately. Instead + * scheduled a delayed work and drop the freq if + * the conditions still remain the same. + */ + schedule_delayed_work(&low_bus_freq_handler, + usecs_to_jiffies(3000000)); + return 0; +} + +/* + * Set the DDR to either 528MHz or 400MHz for iMX6qd + * or 400MHz for iMX6dl. + */ +static int set_high_bus_freq(int high_bus_freq) +{ + if (bus_freq_scaling_initialized && bus_freq_scaling_is_active) + cancel_low_bus_freq_handler(); + + if (busfreq_suspended) + return 0; + + if (!bus_freq_scaling_initialized || !bus_freq_scaling_is_active) + return 0; + + if (high_bus_freq_mode) + return 0; + + /* medium bus freq is only supported for MX6DQ */ + if (med_bus_freq_mode && !high_bus_freq) + return 0; + + if (low_bus_freq_mode || ultra_low_bus_freq_mode) + busfreq_notify(LOW_BUSFREQ_EXIT); + + if (cpu_is_imx7d()) + exit_lpm_imx7d(); + + high_bus_freq_mode = 1; + med_bus_freq_mode = 0; + low_bus_freq_mode = 0; + audio_bus_freq_mode = 0; + cur_bus_freq_mode = BUS_FREQ_HIGH; + + if (high_bus_freq_mode) + dev_dbg(busfreq_dev, + "Bus freq set to high mode. Count: high %d, med %d, audio %d\n", + high_bus_count, med_bus_count, audio_bus_count); + if (med_bus_freq_mode) + dev_dbg(busfreq_dev, + "Bus freq set to med mode. Count: high %d, med %d, audio %d\n", + high_bus_count, med_bus_count, audio_bus_count); + + return 0; +} + +void request_bus_freq(enum bus_freq_mode mode) +{ + mutex_lock(&bus_freq_mutex); + + if (mode == BUS_FREQ_ULTRA_LOW) { + dev_dbg(busfreq_dev, "This mode cannot be requested!\n"); + mutex_unlock(&bus_freq_mutex); + return; + } + + if (mode == BUS_FREQ_HIGH) + high_bus_count++; + else if (mode == BUS_FREQ_MED) + med_bus_count++; + else if (mode == BUS_FREQ_AUDIO) + audio_bus_count++; + else if (mode == BUS_FREQ_LOW) + low_bus_count++; + + if (busfreq_suspended || !bus_freq_scaling_initialized || + !bus_freq_scaling_is_active) { + mutex_unlock(&bus_freq_mutex); + return; + } + + cancel_low_bus_freq_handler(); + + if ((mode == BUS_FREQ_HIGH) && (!high_bus_freq_mode)) { + set_high_bus_freq(1); + mutex_unlock(&bus_freq_mutex); + return; + } + + if ((mode == BUS_FREQ_MED) && (!high_bus_freq_mode) && + (!med_bus_freq_mode)) { + set_high_bus_freq(0); + mutex_unlock(&bus_freq_mutex); + return; + } + if ((mode == BUS_FREQ_AUDIO) && (!high_bus_freq_mode) && + (!med_bus_freq_mode) && (!audio_bus_freq_mode)) { + set_low_bus_freq(); + mutex_unlock(&bus_freq_mutex); + return; + } + mutex_unlock(&bus_freq_mutex); +} +EXPORT_SYMBOL(request_bus_freq); + +void release_bus_freq(enum bus_freq_mode mode) +{ + mutex_lock(&bus_freq_mutex); + + if (mode == BUS_FREQ_ULTRA_LOW) { + dev_dbg(busfreq_dev, + "This mode cannot be released!\n"); + mutex_unlock(&bus_freq_mutex); + return; + } + + if (mode == BUS_FREQ_HIGH) { + if (high_bus_count == 0) { + dev_err(busfreq_dev, "high bus count mismatch!\n"); + dump_stack(); + mutex_unlock(&bus_freq_mutex); + return; + } + high_bus_count--; + } else if (mode == BUS_FREQ_MED) { + if (med_bus_count == 0) { + dev_err(busfreq_dev, "med bus count mismatch!\n"); + dump_stack(); + mutex_unlock(&bus_freq_mutex); + return; + } + med_bus_count--; + } else if (mode == BUS_FREQ_AUDIO) { + if (audio_bus_count == 0) { + dev_err(busfreq_dev, "audio bus count mismatch!\n"); + dump_stack(); + mutex_unlock(&bus_freq_mutex); + return; + } + audio_bus_count--; + } else if (mode == BUS_FREQ_LOW) { + if (low_bus_count == 0) { + dev_err(busfreq_dev, "low bus count mismatch!\n"); + dump_stack(); + mutex_unlock(&bus_freq_mutex); + return; + } + low_bus_count--; + } + + if (busfreq_suspended || !bus_freq_scaling_initialized || + !bus_freq_scaling_is_active) { + mutex_unlock(&bus_freq_mutex); + return; + } + + if ((!audio_bus_freq_mode) && (high_bus_count == 0) && + (med_bus_count == 0) && (audio_bus_count != 0)) { + set_low_bus_freq(); + mutex_unlock(&bus_freq_mutex); + return; + } + if ((!low_bus_freq_mode) && (high_bus_count == 0) && + (med_bus_count == 0) && (audio_bus_count == 0) && + (low_bus_count != 0)) { + set_low_bus_freq(); + mutex_unlock(&bus_freq_mutex); + return; + } + if ((!ultra_low_bus_freq_mode) && (high_bus_count == 0) && + (med_bus_count == 0) && (audio_bus_count == 0) && + (low_bus_count == 0)) { + set_low_bus_freq(); + mutex_unlock(&bus_freq_mutex); + return; + } + + mutex_unlock(&bus_freq_mutex); +} +EXPORT_SYMBOL(release_bus_freq); + +int get_bus_freq_mode(void) +{ + return cur_bus_freq_mode; +} +EXPORT_SYMBOL(get_bus_freq_mode); + +static struct map_desc ddr_iram_io_desc __initdata = { + /* .virtual and .pfn are run-time assigned */ + .length = SZ_1M, + .type = MT_MEMORY_RWX_NONCACHED, +}; + +const static char *ddr_freq_iram_match[] __initconst = { + "fsl,ddr-lpm-sram", + NULL +}; + +static int __init imx_dt_find_ddr_sram(unsigned long node, + const char *uname, int depth, void *data) +{ + unsigned long ddr_iram_addr; + const __be32 *prop; + + if (of_flat_dt_match(node, ddr_freq_iram_match)) { + unsigned int len; + + prop = of_get_flat_dt_prop(node, "reg", &len); + if (prop == NULL || len != (sizeof(unsigned long) * 2)) + return -EINVAL; + ddr_iram_addr = be32_to_cpu(prop[0]); + ddr_freq_change_total_size = be32_to_cpu(prop[1]); + ddr_freq_change_iram_phys = ddr_iram_addr; + + /* Make sure ddr_freq_change_iram_phys is 8 byte aligned. */ + if ((uintptr_t)(ddr_freq_change_iram_phys) & (FNCPY_ALIGN - 1)) + ddr_freq_change_iram_phys += FNCPY_ALIGN - + ((uintptr_t)ddr_freq_change_iram_phys % + (FNCPY_ALIGN)); + } + return 0; +} + +void __init imx_busfreq_map_io(void) +{ + /* + * Get the address of IRAM to be used by the ddr frequency + * change code from the device tree. + */ + WARN_ON(of_scan_flat_dt(imx_dt_find_ddr_sram, NULL)); + if (ddr_freq_change_iram_phys) { + ddr_freq_change_iram_base = IMX_IO_P2V( + ddr_freq_change_iram_phys); + if ((iram_tlb_phys_addr & 0xFFF00000) != + (ddr_freq_change_iram_phys & 0xFFF00000)) { + /* We need to create a 1M page table entry. */ + ddr_iram_io_desc.virtual = IMX_IO_P2V( + ddr_freq_change_iram_phys & 0xFFF00000); + ddr_iram_io_desc.pfn = __phys_to_pfn( + ddr_freq_change_iram_phys & 0xFFF00000); + iotable_init(&ddr_iram_io_desc, 1); + } + memset((void *)ddr_freq_change_iram_base, 0, + ddr_freq_change_total_size); + } +} + +static void bus_freq_daemon_handler(struct work_struct *work) +{ + mutex_lock(&bus_freq_mutex); + if ((!low_bus_freq_mode) && (!ultra_low_bus_freq_mode) + && (high_bus_count == 0) && + (med_bus_count == 0) && (audio_bus_count == 0)) + set_low_bus_freq(); + mutex_unlock(&bus_freq_mutex); +} + +static ssize_t bus_freq_scaling_enable_show(struct device *dev, + struct device_attribute *attr, char *buf) +{ + if (bus_freq_scaling_is_active) + return sprintf(buf, "Bus frequency scaling is enabled\n"); + else + return sprintf(buf, "Bus frequency scaling is disabled\n"); +} + +static ssize_t bus_freq_scaling_enable_store(struct device *dev, + struct device_attribute *attr, + const char *buf, size_t size) +{ + if (strncmp(buf, "1", 1) == 0) { + bus_freq_scaling_is_active = 1; + set_high_bus_freq(1); + /* + * We set bus freq to highest at the beginning, + * so we use this daemon thread to make sure system + * can enter low bus mode if + * there is no high bus request pending + */ + schedule_delayed_work(&bus_freq_daemon, + usecs_to_jiffies(5000000)); + } else if (strncmp(buf, "0", 1) == 0) { + if (bus_freq_scaling_is_active) + set_high_bus_freq(1); + bus_freq_scaling_is_active = 0; + } + return size; +} + +static int bus_freq_pm_notify(struct notifier_block *nb, unsigned long event, + void *dummy) +{ + mutex_lock(&bus_freq_mutex); + + if (event == PM_SUSPEND_PREPARE) { + high_bus_count++; + set_high_bus_freq(1); + busfreq_suspended = 1; + } else if (event == PM_POST_SUSPEND) { + busfreq_suspended = 0; + high_bus_count--; + schedule_delayed_work(&bus_freq_daemon, + usecs_to_jiffies(5000000)); + } + + mutex_unlock(&bus_freq_mutex); + + return NOTIFY_OK; +} + +static int busfreq_reboot_notifier_event(struct notifier_block *this, + unsigned long event, void *ptr) +{ + /* System is rebooting. Set the system into high_bus_freq_mode. */ + request_bus_freq(BUS_FREQ_HIGH); + + return 0; +} + +static struct notifier_block imx_bus_freq_pm_notifier = { + .notifier_call = bus_freq_pm_notify, +}; + +static struct notifier_block imx_busfreq_reboot_notifier = { + .notifier_call = busfreq_reboot_notifier_event, +}; + + +static DEVICE_ATTR(enable, 0644, bus_freq_scaling_enable_show, + bus_freq_scaling_enable_store); + +/*! + * This is the probe routine for the bus frequency driver. + * + * @param pdev The platform device structure + * + * @return The function returns 0 on success + * + */ + +static int busfreq_probe(struct platform_device *pdev) +{ + u32 err; + + busfreq_dev = &pdev->dev; + + /* Return if no IRAM space is allocated for ddr freq change code. */ + if (!ddr_freq_change_iram_base) + return -ENOMEM; + + if (cpu_is_imx7d()) { + osc_clk = devm_clk_get(&pdev->dev, "osc"); + axi_sel_clk = devm_clk_get(&pdev->dev, "axi_sel"); + ahb_sel_clk = devm_clk_get(&pdev->dev, "ahb_sel"); + pfd0_392m = devm_clk_get(&pdev->dev, "pfd0_392m"); + dram_root = devm_clk_get(&pdev->dev, "dram_root"); + dram_alt_sel = devm_clk_get(&pdev->dev, "dram_alt_sel"); + pll_dram = devm_clk_get(&pdev->dev, "pll_dram"); + dram_alt_root = devm_clk_get(&pdev->dev, "dram_alt_root"); + pfd1_332m = devm_clk_get(&pdev->dev, "pfd1_332m"); + pfd2_270m = devm_clk_get(&pdev->dev, "pfd2_270m"); + ahb_clk = devm_clk_get(&pdev->dev, "ahb"); + axi_clk = devm_clk_get(&pdev->dev, "axi"); + if (IS_ERR(osc_clk) || IS_ERR(axi_sel_clk) || IS_ERR(ahb_clk) + || IS_ERR(pfd0_392m) || IS_ERR(dram_root) + || IS_ERR(dram_alt_sel) || IS_ERR(pll_dram) + || IS_ERR(dram_alt_root) || IS_ERR(pfd1_332m) + || IS_ERR(ahb_clk) || IS_ERR(axi_clk) + || IS_ERR(pfd2_270m)) { + dev_err(busfreq_dev, + "%s: failed to get busfreq clk\n", __func__); + return -EINVAL; + } + } + + err = sysfs_create_file(&busfreq_dev->kobj, &dev_attr_enable.attr); + if (err) { + dev_err(busfreq_dev, + "Unable to register sysdev entry for BUSFREQ"); + return err; + } + + if (of_property_read_u32(pdev->dev.of_node, "fsl,max_ddr_freq", + &ddr_normal_rate)) { + dev_err(busfreq_dev, "max_ddr_freq entry missing\n"); + return -EINVAL; + } + + high_bus_freq_mode = 1; + med_bus_freq_mode = 0; + low_bus_freq_mode = 0; + audio_bus_freq_mode = 0; + ultra_low_bus_freq_mode = 0; + cur_bus_freq_mode = BUS_FREQ_HIGH; + + bus_freq_scaling_is_active = 1; + bus_freq_scaling_initialized = 1; + + ddr_low_rate = LPAPM_CLK; + + INIT_DELAYED_WORK(&low_bus_freq_handler, reduce_bus_freq_handler); + INIT_DELAYED_WORK(&bus_freq_daemon, bus_freq_daemon_handler); + register_pm_notifier(&imx_bus_freq_pm_notifier); + register_reboot_notifier(&imx_busfreq_reboot_notifier); + + /* enter low bus mode if no high speed device enabled */ + schedule_delayed_work(&bus_freq_daemon, + msecs_to_jiffies(20000)); + + /* + * Need to make sure to an entry for the ddr freq change code + * address in the IRAM page table. + * This is only required if the DDR freq code and suspend/idle + * code are in different OCRAM spaces. + */ + if ((iram_tlb_phys_addr & 0xFFF00000) != + (ddr_freq_change_iram_phys & 0xFFF00000)) { + unsigned long i; + + /* + * Make sure the ddr_iram virtual address has a mapping + * in the IRAM page table. + */ + i = ((IMX_IO_P2V(ddr_freq_change_iram_phys) >> 20) << 2) / 4; + *((unsigned long *)iram_tlb_base_addr + i) = + (ddr_freq_change_iram_phys & 0xFFF00000) | + TT_ATTRIB_NON_CACHEABLE_1M; + } + + if (cpu_is_imx7d()) { + ddr_type = imx_ddrc_get_ddr_type(); + /* reduce ddr3 normal rate to 400M due to CKE issue on TO1.1 */ + if (imx_get_soc_revision() == IMX_CHIP_REVISION_1_1 && + ddr_type == IMX_DDR_TYPE_DDR3) { + ddr_normal_rate = 400000000; + pr_info("ddr3 normal rate changed to 400MHz for TO1.1.\n"); + } + busfreq_func.init = &init_ddrc_ddr_settings; + busfreq_func.update = &update_ddr_freq_imx_smp; + } + + if (busfreq_func.init) + err = busfreq_func.init(pdev); + else + err = -EINVAL; + + if (err) { + dev_err(busfreq_dev, "Busfreq init of ddr controller failed\n"); + return err; + } + + return 0; +} + +static const struct of_device_id imx_busfreq_ids[] = { + { .compatible = "fsl,imx_busfreq", }, + { /* sentinel */ } +}; + +static struct platform_driver busfreq_driver = { + .driver = { + .name = "imx_busfreq", + .owner = THIS_MODULE, + .of_match_table = imx_busfreq_ids, + }, + .probe = busfreq_probe, +}; + +/*! + * Initialise the busfreq_driver. + * + * @return The function always returns 0. + */ + +static int __init busfreq_init(void) +{ +#ifndef CONFIG_MX6_VPU_352M + if (platform_driver_register(&busfreq_driver) != 0) + return -ENODEV; + + pr_info("Bus freq driver module loaded\n"); +#endif + return 0; +} + +static void __exit busfreq_cleanup(void) +{ + sysfs_remove_file(&busfreq_dev->kobj, &dev_attr_enable.attr); + + /* Unregister the device structure */ + platform_driver_unregister(&busfreq_driver); + bus_freq_scaling_initialized = 0; +} + +module_init(busfreq_init); +module_exit(busfreq_cleanup); + +MODULE_AUTHOR("Freescale Semiconductor, Inc."); +MODULE_DESCRIPTION("BusFreq driver"); +MODULE_LICENSE("GPL"); diff --git a/arch/arm/mach-imx/busfreq_ddr3.c b/arch/arm/mach-imx/busfreq_ddr3.c new file mode 100644 index 000000000000..3bd03dab05e6 --- /dev/null +++ b/arch/arm/mach-imx/busfreq_ddr3.c @@ -0,0 +1,310 @@ +/* + * Copyright (C) 2011-2016 Freescale Semiconductor, Inc. All Rights Reserved. + */ + +/* + * The code contained herein is licensed under the GNU General Public + * License. You may obtain a copy of the GNU General Public License + * Version 2 or later at the following locations: + * + * http://www.opensource.org/licenses/gpl-license.html + * http://www.gnu.org/copyleft/gpl.html + */ + +/*! + * @file busfreq_ddr3.c + * + * @brief iMX6 DDR3 frequency change specific file. + * + * @ingroup PM + */ +#include <asm/cacheflush.h> +#include <asm/fncpy.h> +#include <asm/io.h> +#include <asm/mach/map.h> +#include <asm/mach-types.h> +#include <asm/tlb.h> +#include <linux/busfreq-imx.h> +#include <linux/clk.h> +#include <linux/clockchips.h> +#include <linux/cpumask.h> +#include <linux/delay.h> +#include <linux/genalloc.h> +#include <linux/interrupt.h> +#include <linux/irq.h> +#include <linux/irqchip/arm-gic.h> +#include <linux/kernel.h> +#include <linux/mutex.h> +#include <linux/of.h> +#include <linux/of_address.h> +#include <linux/of_device.h> +#include <linux/platform_device.h> +#include <linux/proc_fs.h> +#include <linux/sched.h> +#include <linux/slab.h> +#include <linux/smp.h> + +#include "hardware.h" +#include "common.h" + +#define SMP_WFE_CODE_SIZE 0x400 + +#define MIN_DLL_ON_FREQ 333000000 +#define MAX_DLL_OFF_FREQ 125000000 +#define MMDC0_MPMUR0 0x8b8 +#define MMDC0_MPMUR0_OFFSET 16 +#define MMDC0_MPMUR0_MASK 0x3ff + +/* + * This structure is for passing necessary data for low level ocram + * busfreq code(arch/arm/mach-imx/ddr3_freq_imx6.S), if this struct + * definition is changed, the offset definition in + * arch/arm/mach-imx/ddr3_freq_imx6.S must be also changed accordingly, + * otherwise, the busfreq change function will be broken! + * + * This structure will be placed in front of the asm code on ocram. + */ +struct imx6_busfreq_info { + u32 freq; + void *ddr_settings; + u32 dll_off; + void *iomux_offsets; + u32 mu_delay_val; +} __aligned(8); + +/* DDR settings */ +static unsigned long (*iram_iomux_settings)[2]; + +static void __iomem *gic_dist_base; + +static int curr_ddr_rate; + +void (*imx7d_change_ddr_freq)(u32 freq) = NULL; +extern void imx7d_ddr3_freq_change(u32 freq); +extern void imx_lpddr3_freq_change(u32 freq); + +extern unsigned int ddr_normal_rate; +extern int low_bus_freq_mode; +extern int audio_bus_freq_mode; + +extern unsigned long save_ttbr1(void); +extern void restore_ttbr1(unsigned long ttbr1); +extern unsigned long ddr_freq_change_iram_base; + +extern unsigned long ddr_freq_change_total_size; +extern unsigned long iram_tlb_phys_addr; + +#ifdef CONFIG_SMP +volatile u32 *wait_for_ddr_freq_update; +static unsigned int online_cpus; +static u32 *irqs_used; + +void (*wfe_change_ddr_freq)(u32 cpuid, u32 *ddr_freq_change_done); +void (*imx7_wfe_change_ddr_freq)(u32 cpuid, u32 ocram_base); +extern void wfe_smp_freq_change(u32 cpuid, u32 *ddr_freq_change_done); +extern void imx7_smp_wfe(u32 cpuid, u32 ocram_base); +extern unsigned long wfe_smp_freq_change_start asm("wfe_smp_freq_change_start"); +extern unsigned long wfe_smp_freq_change_end asm("wfe_smp_freq_change_end"); +extern void __iomem *imx_scu_base; +#endif + +int can_change_ddr_freq(void) +{ + return 1; +} + +#ifdef CONFIG_SMP +/* + * each active core apart from the one changing + * the DDR frequency will execute this function. + * the rest of the cores have to remain in WFE + * state until the frequency is changed. + */ +static irqreturn_t wait_in_wfe_irq(int irq, void *dev_id) +{ + u32 me; + + me = smp_processor_id(); +#ifdef CONFIG_LOCAL_TIMERS + clockevents_notify(CLOCK_EVT_NOTIFY_BROADCAST_ENTER, + &me); +#endif + if (cpu_is_imx7d()) + imx7_wfe_change_ddr_freq(0x8 * me, + (u32)ddr_freq_change_iram_base); + else + wfe_change_ddr_freq(0xff << (me * 8), + (u32 *)&iram_iomux_settings[0][1]); +#ifdef CONFIG_LOCAL_TIMERS + clockevents_notify(CLOCK_EVT_NOTIFY_BROADCAST_EXIT, + &me); +#endif + + return IRQ_HANDLED; +} +#endif + +/* change the DDR frequency. */ +int update_ddr_freq_imx_smp(int ddr_rate) +{ + int me = 0; + unsigned long ttbr1; +#ifdef CONFIG_SMP + unsigned int reg = 0; + int cpu = 0; +#endif + + if (!can_change_ddr_freq()) + return -1; + + if (ddr_rate == curr_ddr_rate) + return 0; + + printk(KERN_DEBUG "\nBus freq set to %d start...\n", ddr_rate); + + /* ensure that all Cores are in WFE. */ + local_irq_disable(); + +#ifdef CONFIG_SMP + me = smp_processor_id(); + + /* Make sure all the online cores are active */ + while (1) { + bool not_exited_busfreq = false; + u32 reg = 0; + + for_each_online_cpu(cpu) { + if (cpu_is_imx7d()) + reg = *(wait_for_ddr_freq_update + 1); + + if (reg & (0x02 << (cpu * 8))) + not_exited_busfreq = true; + } + if (!not_exited_busfreq) + break; + } + + wmb(); + *wait_for_ddr_freq_update = 1; + dsb(); + if (cpu_is_imx7d()) + online_cpus = *(wait_for_ddr_freq_update + 1); + for_each_online_cpu(cpu) { + *((char *)(&online_cpus) + (u8)cpu) = 0x02; + if (cpu != me) { + /* set the interrupt to be pending in the GIC. */ + reg = 1 << (irqs_used[cpu] % 32); + writel_relaxed(reg, gic_dist_base + GIC_DIST_PENDING_SET + + (irqs_used[cpu] / 32) * 4); + } + } + /* Wait for the other active CPUs to idle */ + while (1) { + u32 reg = 0; + + if (cpu_is_imx7d()) + reg = *(wait_for_ddr_freq_update + 1); + reg |= (0x02 << (me * 8)); + if (reg == online_cpus) + break; + } +#endif + + /* Ensure iram_tlb_phys_addr is flushed to DDR. */ + __cpuc_flush_dcache_area(&iram_tlb_phys_addr, + sizeof(iram_tlb_phys_addr)); + + ttbr1 = save_ttbr1(); + /* Now we can change the DDR frequency. */ + if (cpu_is_imx7d()) + imx7d_change_ddr_freq(ddr_rate); + restore_ttbr1(ttbr1); + curr_ddr_rate = ddr_rate; + +#ifdef CONFIG_SMP + wmb(); + /* DDR frequency change is done . */ + *wait_for_ddr_freq_update = 0; + dsb(); + + /* wake up all the cores. */ + sev(); +#endif + + local_irq_enable(); + + printk(KERN_DEBUG "Bus freq set to %d done! cpu=%d\n", ddr_rate, me); + + return 0; +} + +int init_ddrc_ddr_settings(struct platform_device *busfreq_pdev) +{ + int ddr_type = imx_ddrc_get_ddr_type(); +#ifdef CONFIG_SMP + struct device_node *node; + u32 cpu; + struct device *dev = &busfreq_pdev->dev; + int err; + struct irq_data *d; + + node = of_find_compatible_node(NULL, NULL, "arm,cortex-a7-gic"); + if (!node) { + printk(KERN_ERR "failed to find imx7d-a7-gic device tree data!\n"); + return -EINVAL; + } + gic_dist_base = of_iomap(node, 0); + WARN(!gic_dist_base, "unable to map gic dist registers\n"); + + irqs_used = devm_kzalloc(dev, sizeof(u32) * num_present_cpus(), + GFP_KERNEL); + for_each_online_cpu(cpu) { + int irq; + /* + * set up a reserved interrupt to get all + * the active cores into a WFE state + * before changing the DDR frequency. + */ + irq = platform_get_irq(busfreq_pdev, cpu); + err = request_irq(irq, wait_in_wfe_irq, + IRQF_PERCPU, "ddrc", NULL); + if (err) { + dev_err(dev, + "Busfreq:request_irq failed %d, err = %d\n", + irq, err); + return err; + } + err = irq_set_affinity(irq, cpumask_of(cpu)); + if (err) { + dev_err(dev, + "Busfreq: Cannot set irq affinity irq=%d\n", + irq); + return err; + } + d = irq_get_irq_data(irq); + irqs_used[cpu] = d->hwirq + 32; + } + + /* Store the variable used to communicate between cores */ + wait_for_ddr_freq_update = (u32 *)ddr_freq_change_iram_base; + imx7_wfe_change_ddr_freq = (void *)fncpy( + (void *)ddr_freq_change_iram_base + 0x8, + &imx7_smp_wfe, SMP_WFE_CODE_SIZE - 0x8); +#endif + if (ddr_type == IMX_DDR_TYPE_DDR3) + imx7d_change_ddr_freq = (void *)fncpy( + (void *)ddr_freq_change_iram_base + SMP_WFE_CODE_SIZE, + &imx7d_ddr3_freq_change, + MX7_BUSFREQ_OCRAM_SIZE - SMP_WFE_CODE_SIZE); + else if (ddr_type == IMX_DDR_TYPE_LPDDR3 + || ddr_type == IMX_DDR_TYPE_LPDDR2) + imx7d_change_ddr_freq = (void *)fncpy( + (void *)ddr_freq_change_iram_base + + SMP_WFE_CODE_SIZE, + &imx_lpddr3_freq_change, + MX7_BUSFREQ_OCRAM_SIZE - SMP_WFE_CODE_SIZE); + + curr_ddr_rate = ddr_normal_rate; + + return 0; +} diff --git a/arch/arm/mach-imx/busfreq_lpddr2.c b/arch/arm/mach-imx/busfreq_lpddr2.c new file mode 100644 index 000000000000..2ef1806bbc35 --- /dev/null +++ b/arch/arm/mach-imx/busfreq_lpddr2.c @@ -0,0 +1,373 @@ +/* + * Copyright (C) 2011-2016 Freescale Semiconductor, Inc. All Rights Reserved. + * Copyright 2017 NXP. + */ + +/* + * The code contained herein is licensed under the GNU General Public + * License. You may obtain a copy of the GNU General Public License + * Version 2 or later at the following locations: + * + * http://www.opensource.org/licenses/gpl-license.html + * http://www.gnu.org/copyleft/gpl.html + */ + +/*! + * @file busfreq_lpddr2.c + * + * @brief iMX6 LPDDR2 frequency change specific file. + * + * @ingroup PM + */ +#include <asm/cacheflush.h> +#include <asm/fncpy.h> +#include <asm/io.h> +#include <asm/mach/map.h> +#include <asm/mach-types.h> +#include <asm/tlb.h> +#include <linux/busfreq-imx.h> +#include <linux/clk.h> +#include <linux/clockchips.h> +#include <linux/cpumask.h> +#include <linux/delay.h> +#include <linux/genalloc.h> +#include <linux/interrupt.h> +#include <linux/irq.h> +#include <linux/irqchip/arm-gic.h> +#include <linux/kernel.h> +#include <linux/mutex.h> +#include <linux/of.h> +#include <linux/of_address.h> +#include <linux/of_device.h> +#include <linux/platform_device.h> +#include <linux/proc_fs.h> +#include <linux/sched.h> +#include <linux/smp.h> +#include <linux/slab.h> + +#include "common.h" +#include "hardware.h" + +static struct device *busfreq_dev; +static int curr_ddr_rate; +static DEFINE_SPINLOCK(freq_lock); + +void (*mx6_change_lpddr2_freq)(u32 ddr_freq, int bus_freq_mode) = NULL; + +extern unsigned int ddr_normal_rate; +extern void mx6_lpddr2_freq_change(u32 freq, int bus_freq_mode); +extern void imx6_up_lpddr2_freq_change(u32 freq, int bus_freq_mode); +extern void imx6sll_lpddr2_freq_change(u32 freq, int bus_freq_mode); +extern unsigned long save_ttbr1(void); +extern void restore_ttbr1(unsigned long ttbr1); +extern void mx6q_lpddr2_freq_change(u32 freq, void *ddr_settings); +extern unsigned long ddr_freq_change_iram_base; +extern unsigned long imx6_lpddr2_freq_change_start asm("imx6_lpddr2_freq_change_start"); +extern unsigned long imx6_lpddr2_freq_change_end asm("imx6_lpddr2_freq_change_end"); +extern unsigned long mx6q_lpddr2_freq_change_start asm("mx6q_lpddr2_freq_change_start"); +extern unsigned long mx6q_lpddr2_freq_change_end asm("mx6q_lpddr2_freq_change_end"); +extern unsigned long iram_tlb_phys_addr; + +struct mmdc_settings_info { + u32 size; + void *settings; + int freq; +} __aligned(8); +static struct mmdc_settings_info *mmdc_settings_info; +void (*mx6_change_lpddr2_freq_smp)(u32 ddr_freq, struct mmdc_settings_info + *mmdc_settings_info) = NULL; + +static int mmdc_settings_size; +static unsigned long (*mmdc_settings)[2]; +static unsigned long (*iram_mmdc_settings)[2]; +static unsigned long *iram_settings_size; +static unsigned long *iram_ddr_freq_chage; +unsigned long mmdc_timing_settings[][2] = { + {0x0C, 0x0}, /* mmdc_mdcfg0 */ + {0x10, 0x0}, /* mmdc_mdcfg1 */ + {0x14, 0x0}, /* mmdc_mdcfg2 */ + {0x18, 0x0}, /* mmdc_mdmisc */ + {0x38, 0x0}, /* mmdc_mdcfg3lp */ +}; + +#ifdef CONFIG_SMP +volatile u32 *wait_for_lpddr2_freq_update; +static unsigned int online_cpus; +static u32 *irqs_used; +void (*wfe_change_lpddr2_freq)(u32 cpuid, u32 *ddr_freq_change_done); +extern void wfe_smp_freq_change(u32 cpuid, u32 *ddr_freq_change_done); +extern unsigned long wfe_smp_freq_change_start asm("wfe_smp_freq_change_start"); +extern unsigned long wfe_smp_freq_change_end asm("wfe_smp_freq_change_end"); +extern void __iomem *imx_scu_base; +static void __iomem *gic_dist_base; +#endif + +#ifdef CONFIG_SMP +static irqreturn_t wait_in_wfe_irq(int irq, void *dev_id) +{ + u32 me; + + me = smp_processor_id(); +#ifdef CONFIG_LOCAL_TIMERS + clockevents_notify(CLOCK_EVT_NOTIFY_BROADCAST_ENTER, &me); +#endif + wfe_change_lpddr2_freq(0xff << (me * 8), + (u32 *)ddr_freq_change_iram_base); +#ifdef CONFIG_LOCAL_TIMERS + clockevents_notify(CLOCK_EVT_NOTIFY_BROADCAST_EXIT, &me); +#endif + return IRQ_HANDLED; +} +#endif + +/* change the DDR frequency. */ +int update_lpddr2_freq(int ddr_rate) +{ + unsigned long ttbr1, flags; + int mode = get_bus_freq_mode(); + + if (ddr_rate == curr_ddr_rate) + return 0; + + printk(KERN_DEBUG "\nBus freq set to %d start...\n", ddr_rate); + + spin_lock_irqsave(&freq_lock, flags); + /* + * Flush the TLB, to ensure no TLB maintenance occurs + * when DDR is in self-refresh. + */ + ttbr1 = save_ttbr1(); + + /* Now change DDR frequency. */ + if (cpu_is_imx6sl()) + mx6_change_lpddr2_freq(ddr_rate, + (mode == BUS_FREQ_LOW || mode == BUS_FREQ_ULTRA_LOW) ? 1 : 0); + else + mx6_change_lpddr2_freq(ddr_rate, + (mode == BUS_FREQ_LOW || mode == BUS_FREQ_AUDIO) ? 1 : 0); + + restore_ttbr1(ttbr1); + + curr_ddr_rate = ddr_rate; + spin_unlock_irqrestore(&freq_lock, flags); + + printk(KERN_DEBUG "\nBus freq set to %d done...\n", ddr_rate); + + return 0; +} + +int init_mmdc_lpddr2_settings(struct platform_device *busfreq_pdev) +{ + unsigned long ddr_code_size; + busfreq_dev = &busfreq_pdev->dev; + + ddr_code_size = SZ_4K; + + if (cpu_is_imx6sl()) + mx6_change_lpddr2_freq = (void *)fncpy( + (void *)ddr_freq_change_iram_base, + &mx6_lpddr2_freq_change, ddr_code_size); + if (cpu_is_imx6sx() || cpu_is_imx6ul() || cpu_is_imx6ull()) + mx6_change_lpddr2_freq = (void *)fncpy( + (void *)ddr_freq_change_iram_base, + &imx6_up_lpddr2_freq_change, ddr_code_size); + if (cpu_is_imx6sll()) + mx6_change_lpddr2_freq = (void *)fncpy( + (void *)ddr_freq_change_iram_base, + &imx6sll_lpddr2_freq_change, ddr_code_size); + + curr_ddr_rate = ddr_normal_rate; + + return 0; +} + +int update_lpddr2_freq_smp(int ddr_rate) +{ + unsigned long ttbr1; + int i, me = 0; +#ifdef CONFIG_SMP + int cpu = 0; + u32 reg = 0; +#endif + + if (ddr_rate == curr_ddr_rate) + return 0; + + printk(KERN_DEBUG "Bus freq set to %d start...\n", ddr_rate); + + for (i=0; i < mmdc_settings_size; i++) { + iram_mmdc_settings[i][0] = mmdc_settings[i][0]; + iram_mmdc_settings[i][1] = mmdc_settings[i][1]; + } + + mmdc_settings_info->size = mmdc_settings_size; + mmdc_settings_info->settings = iram_mmdc_settings; + mmdc_settings_info->freq = curr_ddr_rate; + + /* ensure that all Cores are in WFE. */ + local_irq_disable(); + +#ifdef CONFIG_SMP + me = smp_processor_id(); + + /* Make sure all the online cores are active */ + while (1) { + bool not_exited_busfreq = false; + for_each_online_cpu(cpu) { + reg = __raw_readl(imx_scu_base + 0x08); + if (reg & (0x02 << (cpu * 8))) + not_exited_busfreq = true; + } + if (!not_exited_busfreq) + break; + } + + wmb(); + *wait_for_lpddr2_freq_update = 1; + dsb(); + online_cpus = readl_relaxed(imx_scu_base + 0x08); + for_each_online_cpu(cpu) { + *((char *)(&online_cpus) + (u8)cpu) = 0x02; + if (cpu != me) { + reg = 1 << (irqs_used[cpu] % 32); + writel_relaxed(reg, gic_dist_base + GIC_DIST_PENDING_SET + + (irqs_used[cpu] / 32) * 4); + } + } + + /* Wait for the other active CPUs to idle */ + while (1) { + reg = 0; + reg = readl_relaxed(imx_scu_base + 0x08); + reg |= (0x02 << (me * 8)); + if (reg == online_cpus) + break; + } +#endif + + /* Ensure iram_tlb_phys_addr is flushed to DDR. */ + __cpuc_flush_dcache_area(&iram_tlb_phys_addr, + sizeof(iram_tlb_phys_addr)); + outer_clean_range(__pa(&iram_tlb_phys_addr), + __pa(&iram_tlb_phys_addr + 1)); + /* + * Flush the TLB, to ensure no TLB maintenance occurs + * when DDR is in self-refresh. + */ + ttbr1 = save_ttbr1(); + + curr_ddr_rate = ddr_rate; + + /* Now change DDR frequency. */ + mx6_change_lpddr2_freq_smp(ddr_rate, mmdc_settings_info); + + restore_ttbr1(ttbr1); + +#ifdef CONFIG_SMP + wmb(); + /* DDR frequency change is done . */ + *wait_for_lpddr2_freq_update = 0; + dsb(); + /* wake up all the cores. */ + sev(); +#endif + + local_irq_enable(); + + printk(KERN_DEBUG "Bus freq set to %d done! cpu=%d\n", ddr_rate, me); + + return 0; +} + +int init_mmdc_lpddr2_settings_mx6q(struct platform_device *busfreq_pdev) +{ + struct device *dev = &busfreq_pdev->dev; + unsigned long ddr_code_size = 0; + unsigned long wfe_code_size = 0; + struct device_node *node; + void __iomem *mmdc_base; + int i; +#ifdef CONFIG_SMP + struct irq_data *d; + u32 cpu; + int err; +#endif + + node = of_find_compatible_node(NULL, NULL, "fsl,imx6q-mmdc"); + if (!node) { + printk(KERN_ERR "failed to find mmdc device tree data!\n"); + return -EINVAL; + } + + mmdc_base = of_iomap(node, 0); + if (!mmdc_base) { + dev_err(dev, "unable to map mmdc registers\n"); + return -EINVAL; + } + + mmdc_settings_size = ARRAY_SIZE(mmdc_timing_settings); + mmdc_settings = kmalloc((mmdc_settings_size * 8), GFP_KERNEL); + memcpy(mmdc_settings, mmdc_timing_settings, + sizeof(mmdc_timing_settings)); + +#ifdef CONFIG_SMP + node = of_find_compatible_node(NULL, NULL, "arm,cortex-a9-gic"); + if (!node) { + printk(KERN_ERR "failed to find imx6q-a9-gic device tree data!\n"); + return -EINVAL; + } + + gic_dist_base = of_iomap(node, 0); + WARN(!gic_dist_base, "unable to map gic dist registers\n"); + + irqs_used = devm_kzalloc(dev, sizeof(u32) * num_present_cpus(), + GFP_KERNEL); + + for_each_online_cpu(cpu) { + int irq = platform_get_irq(busfreq_pdev, cpu); + err = request_irq(irq, wait_in_wfe_irq, IRQF_PERCPU, + "mmdc_1", NULL); + if (err) { + dev_err(dev, + "Busfreq:request_irq failed %d, err = %d\n", + irq, err); + return err; + } + err = irq_set_affinity(irq, cpumask_of(cpu)); + if (err) { + dev_err(dev, + "Busfreq: Cannot set irq affinity irq=%d,\n", + irq); + return err; + } + d = irq_get_irq_data(irq); + irqs_used[cpu] = d->hwirq + 32; + } + + /* Stoange_iram_basee the variable used to communicate between cores in + * a non-cacheable IRAM area */ + wait_for_lpddr2_freq_update = (u32 *)ddr_freq_change_iram_base; + wfe_code_size = (&wfe_smp_freq_change_end - &wfe_smp_freq_change_start) *4; + + wfe_change_lpddr2_freq = (void *)fncpy((void *)ddr_freq_change_iram_base + 0x8, + &wfe_smp_freq_change, wfe_code_size); +#endif + iram_settings_size = (void *)ddr_freq_change_iram_base + wfe_code_size + 0x8; + iram_mmdc_settings = (void *)iram_settings_size + sizeof(*mmdc_settings_info); + iram_ddr_freq_chage = (void *)iram_mmdc_settings + (mmdc_settings_size * 8) + 0x8; + mmdc_settings_info = (struct mmdc_settings_info *)iram_settings_size; + + ddr_code_size = (&mx6q_lpddr2_freq_change_end -&mx6q_lpddr2_freq_change_start) *4; + + mx6_change_lpddr2_freq_smp = (void *)fncpy(iram_ddr_freq_chage, + &mx6q_lpddr2_freq_change, ddr_code_size); + + /* save initial mmdc boot timing settings */ + for (i=0; i < mmdc_settings_size; i++) + mmdc_settings[i][1] = readl_relaxed(mmdc_base + + mmdc_settings[i][0]); + + curr_ddr_rate = ddr_normal_rate; + + return 0; +} diff --git a/arch/arm/mach-imx/common.c b/arch/arm/mach-imx/common.c new file mode 100644 index 000000000000..cf57b55a369b --- /dev/null +++ b/arch/arm/mach-imx/common.c @@ -0,0 +1,166 @@ +/* + * Copyright (C) 2015-2016 Freescale Semiconductor, Inc. + * + * The code contained herein is licensed under the GNU General Public + * License. You may obtain a copy of the GNU General Public License + * Version 2 or later at the following locations: + * + * http://www.opensource.org/licenses/gpl-license.html + * http://www.gnu.org/copyleft/gpl.html + */ +#include <linux/io.h> +#include <linux/of.h> +#include <linux/of_address.h> +#include <linux/of_net.h> +#include <linux/slab.h> + +#include "hardware.h" + +unsigned long iram_tlb_base_addr; +unsigned long iram_tlb_phys_addr; + +unsigned long save_ttbr1(void) +{ + unsigned long lttbr1; + asm volatile( + ".align 4\n" + "mrc p15, 0, %0, c2, c0, 1\n" + : "=r" (lttbr1) + ); + return lttbr1; +} + +void restore_ttbr1(unsigned long ttbr1) +{ + asm volatile( + ".align 4\n" + "mcr p15, 0, %0, c2, c0, 1\n" + : : "r" (ttbr1) + ); +} + +#define OCOTP_MAC_OFF (cpu_is_imx7d() ? 0x640 : 0x620) +#define OCOTP_MACn(n) (OCOTP_MAC_OFF + (n) * 0x10) +void __init imx6_enet_mac_init(const char *enet_compat, const char *ocotp_compat) +{ + struct device_node *ocotp_np, *enet_np, *from = NULL; + void __iomem *base; + struct property *newmac; + u32 macaddr_low; + u32 macaddr_high = 0; + u32 macaddr1_high = 0; + u8 *macaddr; + int i, id; + + for (i = 0; i < 2; i++) { + enet_np = of_find_compatible_node(from, NULL, enet_compat); + if (!enet_np) + return; + + from = enet_np; + + if (of_get_mac_address(enet_np)) + goto put_enet_node; + + id = of_alias_get_id(enet_np, "ethernet"); + if (id < 0) + id = i; + + ocotp_np = of_find_compatible_node(NULL, NULL, ocotp_compat); + if (!ocotp_np) { + pr_warn("failed to find ocotp node\n"); + goto put_enet_node; + } + + base = of_iomap(ocotp_np, 0); + if (!base) { + pr_warn("failed to map ocotp\n"); + goto put_ocotp_node; + } + + macaddr_low = readl_relaxed(base + OCOTP_MACn(1)); + if (id) + macaddr1_high = readl_relaxed(base + OCOTP_MACn(2)); + else + macaddr_high = readl_relaxed(base + OCOTP_MACn(0)); + + newmac = kzalloc(sizeof(*newmac) + 6, GFP_KERNEL); + if (!newmac) + goto put_ocotp_node; + + newmac->value = newmac + 1; + newmac->length = 6; + newmac->name = kstrdup("local-mac-address", GFP_KERNEL); + if (!newmac->name) { + kfree(newmac); + goto put_ocotp_node; + } + + macaddr = newmac->value; + if (id) { + macaddr[5] = (macaddr_low >> 16) & 0xff; + macaddr[4] = (macaddr_low >> 24) & 0xff; + macaddr[3] = macaddr1_high & 0xff; + macaddr[2] = (macaddr1_high >> 8) & 0xff; + macaddr[1] = (macaddr1_high >> 16) & 0xff; + macaddr[0] = (macaddr1_high >> 24) & 0xff; + } else { + macaddr[5] = macaddr_high & 0xff; + macaddr[4] = (macaddr_high >> 8) & 0xff; + macaddr[3] = (macaddr_high >> 16) & 0xff; + macaddr[2] = (macaddr_high >> 24) & 0xff; + macaddr[1] = macaddr_low & 0xff; + macaddr[0] = (macaddr_low >> 8) & 0xff; + } + + of_update_property(enet_np, newmac); + +put_ocotp_node: + of_node_put(ocotp_np); +put_enet_node: + of_node_put(enet_np); + } +} + +#ifndef CONFIG_HAVE_IMX_GPC +int imx_gpc_mf_request_on(unsigned int irq, unsigned int on) { return 0; } +EXPORT_SYMBOL_GPL(imx_gpc_mf_request_on); +#endif + +#if !defined(CONFIG_SOC_IMX6SL) +u32 imx6_lpddr2_freq_change_start, imx6_lpddr2_freq_change_end; +void mx6_lpddr2_freq_change(u32 freq, int bus_freq_mode) {} +#endif + +#if !defined(CONFIG_SOC_IMX6SLL) +void imx6sll_lpddr2_freq_change(u32 freq, int bus_freq_mode) {} +#endif + +#if !defined(CONFIG_SOC_IMX6SX) && !defined(CONFIG_SOC_IMX6UL) +u32 imx6_up_ddr3_freq_change_start, imx6_up_ddr3_freq_change_end; +struct imx6_busfreq_info { +} __aligned(8); +void imx6_up_ddr3_freq_change(struct imx6_busfreq_info *busfreq_info) {} +void imx6_up_lpddr2_freq_change(u32 freq, int bus_freq_mode) {} +#endif + +#if !defined(CONFIG_SOC_IMX6ULL) +u32 mx6ull_lpm_wfi_start, mx6ull_lpm_wfi_end; +void imx6ull_low_power_idle(void) {} +#endif + +#if !defined(CONFIG_SOC_IMX6Q) +u32 mx6_ddr3_freq_change_start, mx6_ddr3_freq_change_end; +u32 mx6q_lpddr2_freq_change_start, mx6q_lpddr2_freq_change_end; +u32 wfe_smp_freq_change_start, wfe_smp_freq_change_end; +void mx6_ddr3_freq_change(u32 freq, void *ddr_settings, + bool dll_mode, void *iomux_offsets) {} +void mx6q_lpddr2_freq_change(u32 freq, void *ddr_settings) {} +void wfe_smp_freq_change(u32 cpuid, u32 *ddr_freq_change_done) {} +#endif + +#if !defined(CONFIG_SOC_IMX7D) +void imx7_smp_wfe(u32 cpuid, u32 ocram_base) {} +void imx7d_ddr3_freq_change(u32 freq) {} +#endif + diff --git a/arch/arm/mach-imx/common.h b/arch/arm/mach-imx/common.h index 912aeceb4ff8..60add3295015 100644 --- a/arch/arm/mach-imx/common.h +++ b/arch/arm/mach-imx/common.h @@ -104,6 +104,8 @@ void imx6_set_int_mem_clk_lpm(bool enable); void imx6sl_set_wait_clk(bool enter); int imx_mmdc_get_ddr_type(void); int imx7ulp_set_lpm(enum ulp_cpu_pwr_mode mode); +void imx_busfreq_map_io(void); +void imx7_pm_map_io(void); void imx_cpu_die(unsigned int cpu); int imx_cpu_kill(unsigned int cpu); @@ -120,6 +122,12 @@ static const u32 imx53_suspend_sz; static inline void imx6_suspend(void __iomem *ocram_vbase) {} #endif +#ifdef CONFIG_HAVE_IMX_DDRC +int imx_ddrc_get_ddr_type(void); +#else +static inline int imx_ddrc_get_ddr_type(void) { return 0; } +#endif + void imx6_pm_ccm_init(const char *ccm_compat); void imx6q_pm_init(void); void imx6dl_pm_init(void); diff --git a/arch/arm/mach-imx/ddr3_freq_imx7d.S b/arch/arm/mach-imx/ddr3_freq_imx7d.S new file mode 100644 index 000000000000..9342e0d83f5e --- /dev/null +++ b/arch/arm/mach-imx/ddr3_freq_imx7d.S @@ -0,0 +1,586 @@ +/* + * Copyright (C) 2015-2016 Freescale Semiconductor, Inc. All Rights Reserved. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + + * 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/linkage.h> +#include "hardware.h" + +#define DDRC_MSTR 0x0 +#define DDRC_STAT 0x4 +#define DDRC_MRCTRL0 0x10 +#define DDRC_MRCTRL1 0x14 +#define DDRC_MRSTAT 0x18 +#define DDRC_PWRCTL 0x30 +#define DDRC_RFSHCTL3 0x60 +#define DDRC_RFSHTMG 0x64 +#define DDRC_DBG1 0x304 +#define DDRC_SWCTL 0x320 +#define DDRC_SWSTAT 0x324 +#define DDRC_PSTAT 0x3fc +#define DDRC_PCTRL_0 0x490 +#define DDRC_ZQCTL0 0x180 +#define DDRC_DFIMISC 0x1b0 +#define DDRC_DBGCAM 0x308 +#define DDRPHY_LP_CON0 0x18 +#define IOMUXC_GPR8 0x20 +#define DDRPHY_MDLL_CON0 0xb0 +#define DDRPHY_MDLL_CON1 0xb4 +#define DDRPHY_OFFSETD_CON0 0x50 +#define DDRPHY_OFFSETR_CON0 0x20 +#define DDRPHY_OFFSETR_CON1 0x24 +#define DDRPHY_OFFSETR_CON2 0x28 +#define DDRPHY_OFFSETW_CON0 0x30 +#define DDRPHY_OFFSETW_CON1 0x34 +#define DDRPHY_OFFSETW_CON2 0x38 +#define DDRPHY_CA_WLDSKEW_CON0 0x6c +#define DDRPHY_CA_DSKEW_CON0 0x7c +#define DDRPHY_CA_DSKEW_CON1 0x80 +#define DDRPHY_CA_DSKEW_CON2 0x84 + +#define ANADIG_DIGPROG 0x800 + + .align 3 + + .macro switch_to_below_100m + + ldr r7, =0x2 + str r7, [r4, #DDRC_DBG1] + + ldr r6, =0x36000000 +1: + ldr r7, [r4, #DDRC_DBGCAM] + and r7, r7, r6 + cmp r7, r6 + bne 1b + + ldr r6, =0x1 +2: + ldr r7, [r4, #DDRC_MRSTAT] + and r7, r7, r6 + cmp r7, r6 + beq 2b + + ldr r7, =0x10f0 + str r7, [r4, #DDRC_MRCTRL0] + ldr r7, =0x0 + str r7, [r4, #DDRC_MRCTRL1] + ldr r7, =0x800010f0 + str r7, [r4, #DDRC_MRCTRL0] + + ldr r6, =0x1 +3: + ldr r7, [r4, #DDRC_MRSTAT] + and r7, r7, r6 + cmp r7, r6 + beq 3b + + ldr r7, =0x20f0 + str r7, [r4, #DDRC_MRCTRL0] + ldr r7, =0x8 + str r7, [r4, #DDRC_MRCTRL1] + ldr r7, =0x800020f0 + str r7, [r4, #DDRC_MRCTRL0] + + ldr r6, =0x1 +4: + ldr r7, [r4, #DDRC_MRSTAT] + and r7, r7, r6 + cmp r7, r6 + beq 4b + + ldr r7, =0x10f0 + str r7, [r4, #DDRC_MRCTRL0] + ldr r7, =0x1 + str r7, [r4, #DDRC_MRCTRL1] + ldr r7, =0x800010f0 + str r7, [r4, #DDRC_MRCTRL0] + + ldr r7, =0x20 + str r7, [r4, #DDRC_PWRCTL] + + ldr r6, =0x23 +5: + ldr r7, [r4, #DDRC_STAT] + and r7, r7, r6 + cmp r7, r6 + bne 5b + + ldr r7, =0x0 + str r7, [r4, #DDRC_SWCTL] + + ldr r7, =0x03048001 + str r7, [r4, #DDRC_MSTR] + + ldr r7, =0x1 + str r7, [r4, #DDRC_SWCTL] + + ldr r6, =0x1 +6: + ldr r7, [r4, #DDRC_SWSTAT] + and r7, r7, r6 + cmp r7, r6 + bne 6b + + ldr r7, =0x10010100 + str r7, [r5, #0x4] + + ldr r6, =24000000 + cmp r0, r6 + beq 25f + + ldr r7, =0x000B000D + str r7,[r4, #DDRC_RFSHTMG] + b 7f + +25: + ldr r7, =0x00030004 + str r7,[r4, #DDRC_RFSHTMG] + + /* dram alt sel set to OSC */ + ldr r7, =0x10000000 + ldr r8, =0xa080 + str r7, [r2, r8] + /* dram root set to from dram alt, div by 1 */ + ldr r7, =0x11000000 + ldr r8, =0x9880 + str r7, [r2, r8] + b 8f +7: + /* dram alt sel set to pfd0_392m */ + ldr r7, =0x15000000 + ldr r8, =0xa080 + str r7, [r2, r8] + /* dram root set to from dram alt, div by 4 */ + ldr r7, =0x11000003 + ldr r8, =0x9880 + str r7, [r2, r8] +8: + ldr r7, =0x202ffd0 + str r7, [r5, #DDRPHY_MDLL_CON0] + + ldr r7, =0x1000007f + str r7, [r5, #DDRPHY_OFFSETD_CON0] + + ldr r7, =0x7f7f7f7f + str r7, [r5, #DDRPHY_OFFSETR_CON0] + str r7, [r5, #DDRPHY_OFFSETR_CON1] + ldr r7, =0x7f + str r7, [r5, #DDRPHY_OFFSETR_CON2] + + ldr r7, =0x7f7f7f7f + str r7, [r5, #DDRPHY_OFFSETW_CON0] + str r7, [r5, #DDRPHY_OFFSETW_CON1] + ldr r7, =0x7f + str r7, [r5, #DDRPHY_OFFSETW_CON2] + + ldr r7, [r9, #ANADIG_DIGPROG] + and r7, r7, #0x11 + cmp r7, #0x11 + bne 20f + + ldr r7, =0x0 + str r7, [r5, #DDRPHY_CA_WLDSKEW_CON0] + ldr r7, =0x60606060 + str r7, [r5, #DDRPHY_CA_DSKEW_CON0] + str r7, [r5, #DDRPHY_CA_DSKEW_CON1] + ldr r7, =0x00006060 + str r7, [r5, #DDRPHY_CA_DSKEW_CON2] + b 21f +20: + ldr r7, =0x0 + str r7, [r5, #DDRPHY_CA_DSKEW_CON0] + str r7, [r5, #DDRPHY_CA_DSKEW_CON1] + str r7, [r5, #DDRPHY_CA_DSKEW_CON2] +21: + ldr r7, =0x1100007f + str r7, [r5, #DDRPHY_OFFSETD_CON0] + ldr r7, =0x1000007f + str r7, [r5, #DDRPHY_OFFSETD_CON0] + + ldr r7, =0x0 + str r7, [r4, #DDRC_PWRCTL] + + ldr r6, =0x1 +9: + ldr r7, [r4, #DDRC_MRSTAT] + and r7, r7, r6 + cmp r7, r6 + beq 9b + + ldr r7, =0xf0 + str r7, [r4, #DDRC_MRCTRL0] + ldr r7, =0x820 + str r7, [r4, #DDRC_MRCTRL1] + ldr r7, =0x800000f0 + str r7, [r4, #DDRC_MRCTRL0] + + ldr r6, =0x1 +10: + ldr r7, [r4, #DDRC_MRSTAT] + and r7, r7, r6 + cmp r7, r6 + beq 10b + + ldr r7, =0x800020 + str r7, [r4, #DDRC_ZQCTL0] + + ldr r7, =0x0 + str r7, [r4, #DDRC_DBG1] + + /* enable auto self-refresh */ + ldr r7, [r4, #DDRC_PWRCTL] + orr r7, r7, #(1 << 0) + str r7, [r4, #DDRC_PWRCTL] + + .endm + + .macro switch_to_533m + + ldr r7, =0x2 + str r7, [r4, #DDRC_DBG1] + + ldr r7, =0x78 + str r7, [r3, #IOMUXC_GPR8] + orr r7, r7, #0x100 + str r7, [r3, #IOMUXC_GPR8] + + ldr r6, =0x30000000 +11: + ldr r7, [r4, #DDRC_DBGCAM] + and r7, r7, r6 + cmp r7, r6 + bne 11b + + ldr r6, =0x1 +12: + ldr r7, [r4, #DDRC_MRSTAT] + and r7, r7, r6 + cmp r7, r6 + beq 12b + + ldr r7, =0x10f0 + str r7, [r4, #DDRC_MRCTRL0] + ldr r7, =0x1 + str r7, [r4, #DDRC_MRCTRL1] + ldr r7, =0x800010f0 + str r7, [r4, #DDRC_MRCTRL0] + + ldr r7, =0x20 + str r7, [r4, #DDRC_PWRCTL] + + ldr r6, =0x23 +13: + ldr r7, [r4, #DDRC_STAT] + and r7, r7, r6 + cmp r7, r6 + bne 13b + + ldr r7, =0x03040001 + str r7, [r4, #DDRC_MSTR] + + ldr r7, =0x40800020 + str r7, [r4, #DDRC_ZQCTL0] + + + ldr r7, =0x10210100 + str r7, [r5, #0x4] + + ldr r7, =0x00040046 + str r7, [r4, #DDRC_RFSHTMG] + + /* dram root set to from dram main, div by 2 */ + ldr r7, =0x10000001 + ldr r8, =0x9880 + str r7, [r2, r8] + + ldr r7, =0x1010007e + str r7, [r5, #DDRPHY_MDLL_CON0] + + ldr r7, =0x10000008 + str r7, [r5, #DDRPHY_OFFSETD_CON0] + + ldr r7, =0x08080808 + str r7, [r5, #DDRPHY_OFFSETR_CON0] + str r7, [r5, #DDRPHY_OFFSETR_CON1] + ldr r7, =0x8 + str r7, [r5, #DDRPHY_OFFSETR_CON2] + + ldr r7, =0x08080808 + str r7, [r5, #DDRPHY_OFFSETW_CON0] + str r7, [r5, #DDRPHY_OFFSETW_CON1] + ldr r7, =0x8 + str r7, [r5, #DDRPHY_OFFSETW_CON2] + + ldr r7, [r9, #ANADIG_DIGPROG] + and r7, r7, #0x11 + cmp r7, #0x11 + bne 22f + + ldr r7, =0x40404040 + str r7, [r5, #DDRPHY_CA_WLDSKEW_CON0] + ldr r7, =0x18181818 + str r7, [r5, #DDRPHY_CA_DSKEW_CON0] + str r7, [r5, #DDRPHY_CA_DSKEW_CON1] + ldr r7, =0x40401818 + str r7, [r5, #DDRPHY_CA_DSKEW_CON2] + b 23f +22: + ldr r7, =0x0 + str r7, [r5, #DDRPHY_CA_DSKEW_CON0] + str r7, [r5, #DDRPHY_CA_DSKEW_CON1] + str r7, [r5, #DDRPHY_CA_DSKEW_CON2] +23: + ldr r7, =0x11000008 + str r7, [r5, #DDRPHY_OFFSETD_CON0] + ldr r7, =0x10000008 + str r7, [r5, #DDRPHY_OFFSETD_CON0] + + ldr r6, =0x4 +14: + ldr r7, [r5, #DDRPHY_MDLL_CON1] + and r7, r7, r6 + cmp r7, r6 + bne 14b + + ldr r7, =0x1 + str r7, [r4, #DDRC_RFSHCTL3] + ldr r7, =0x3 + str r7, [r4, #DDRC_RFSHCTL3] + + ldr r7, =0x0 + str r7, [r4, #DDRC_PWRCTL] + + ldr r6, =0x1 +15: + ldr r7, [r4, #DDRC_MRSTAT] + and r7, r7, r6 + cmp r7, r6 + beq 15b + + ldr r7, =0x10f0 + str r7, [r4, #DDRC_MRCTRL0] + ldr r7, =0x0 + str r7, [r4, #DDRC_MRCTRL1] + ldr r7, =0x800010f0 + str r7, [r4, #DDRC_MRCTRL0] + + ldr r6, =0x1 +16: + ldr r7, [r4, #DDRC_MRSTAT] + and r7, r7, r6 + cmp r7, r6 + beq 16b + + ldr r7, =0xf0 + str r7, [r4, #DDRC_MRCTRL0] + ldr r7, =0x930 + str r7, [r4, #DDRC_MRCTRL1] + ldr r7, =0x800000f0 + str r7, [r4, #DDRC_MRCTRL0] + + ldr r7, =0x0 + str r7, [r4, #DDRC_RFSHCTL3] + ldr r7, =0x2 + str r7, [r4, #DDRC_RFSHCTL3] + + ldr r6, =0x1 +17: + ldr r7, [r4, #DDRC_MRSTAT] + and r7, r7, r6 + cmp r7, r6 + beq 17b + + ldr r7, =0xf0 + str r7, [r4, #DDRC_MRCTRL0] + ldr r7, =0x930 + str r7, [r4, #DDRC_MRCTRL1] + ldr r7, =0x800000f0 + str r7, [r4, #DDRC_MRCTRL0] + + ldr r6, =0x1 +18: + ldr r7, [r4, #DDRC_MRSTAT] + and r7, r7, r6 + cmp r7, r6 + beq 18b + + ldr r7, =0x20f0 + str r7, [r4, #DDRC_MRCTRL0] + ldr r7, =0x408 + str r7, [r4, #DDRC_MRCTRL1] + ldr r7, =0x800020f0 + str r7, [r4, #DDRC_MRCTRL0] + + ldr r6, =0x1 +19: + ldr r7, [r4, #DDRC_MRSTAT] + and r7, r7, r6 + cmp r7, r6 + beq 19b + + ldr r7, =0x10f0 + str r7, [r4, #DDRC_MRCTRL0] + ldr r7, =0x4 + str r7, [r4, #DDRC_MRCTRL1] + ldr r7, =0x800010f0 + str r7, [r4, #DDRC_MRCTRL0] + + ldr r7, =0x0 + str r7, [r4, #DDRC_DBG1] + + /* enable auto self-refresh */ + ldr r7, [r4, #DDRC_PWRCTL] + orr r7, r7, #(1 << 0) + str r7, [r4, #DDRC_PWRCTL] + + .endm + +ENTRY(imx7d_ddr3_freq_change) + push {r2 - r9} + + /* + * To ensure no page table walks occur in DDR, we + * have a another page table stored in IRAM that only + * contains entries pointing to IRAM, AIPS1 and AIPS2. + * We need to set the TTBR1 to the new IRAM TLB. + * Do the following steps: + * 1. Flush the Branch Target Address Cache (BTAC) + * 2. Set TTBR1 to point to IRAM page table. + * 3. Disable page table walks in TTBR0 (PD0 = 1) + * 4. Set TTBR0.N=1, implying 0-2G is translated by TTBR0 + * and 2-4G is translated by TTBR1. + */ + ldr r6, =0x0 + mcr p15, 0, r6, c8, c3, 0 + + ldr r6, =iram_tlb_phys_addr + ldr r7, [r6] + + /* Disable Branch Prediction, Z bit in SCTLR. */ + mrc p15, 0, r6, c1, c0, 0 + bic r6, r6, #0x800 + mcr p15, 0, r6, c1, c0, 0 + + /* Flush the Branch Target Address Cache (BTAC) */ + ldr r6, =0x0 + mcr p15, 0, r6, c7, c1, 6 + + dsb + isb + /* Store the IRAM table in TTBR1 */ + mcr p15, 0, r7, c2, c0, 1 + + /* Read TTBCR and set PD0=1, N = 1 */ + mrc p15, 0, r6, c2, c0, 2 + orr r6, r6, #0x11 + mcr p15, 0, r6, c2, c0, 2 + + dsb + isb + + /* flush the TLB */ + ldr r6, =0x0 + mcr p15, 0, r6, c8, c3, 0 + + dsb + isb + + ldr r2, =IMX_IO_P2V(MX7D_CCM_BASE_ADDR) + ldr r3, =IMX_IO_P2V(MX7D_IOMUXC_GPR_BASE_ADDR) + ldr r4, =IMX_IO_P2V(MX7D_DDRC_BASE_ADDR) + ldr r5, =IMX_IO_P2V(MX7D_DDRC_PHY_BASE_ADDR) + ldr r9, =IMX_IO_P2V(MX7D_ANATOP_BASE_ADDR) + + ldr r6, =100000000 + cmp r0, r6 + bgt set_to_533m + +set_to_below_100m: + switch_to_below_100m + b done + +set_to_533m: + switch_to_533m + b done + +done: + /* Enable L1 data cache. */ + mrc p15, 0, r6, c1, c0, 0 + orr r6, r6, #0x4 + mcr p15, 0, r6, c1, c0, 0 + + /* Restore the TTBCR */ + dsb + isb + + /* Read TTBCR and set PD0=0, N = 0 */ + mrc p15, 0, r6, c2, c0, 2 + bic r6, r6, #0x11 + mcr p15, 0, r6, c2, c0, 2 + dsb + isb + + /* flush the TLB */ + ldr r6, =0x0 + mcr p15, 0, r6, c8, c3, 0 + + dsb + isb + + /* Enable Branch Prediction, Z bit in SCTLR. */ + mrc p15, 0, r6, c1, c0, 0 + orr r6, r6, #0x800 + mcr p15, 0, r6, c1, c0, 0 + + /* Flush the Branch Target Address Cache (BTAC) */ + ldr r6, =0x0 + mcr p15, 0, r6, c7, c1, 6 + + dsb + isb + + nop + nop + nop + nop + nop + + nop + nop + nop + nop + nop + + nop + nop + nop + nop + nop + + nop + nop + nop + nop + nop + + nop + nop + nop + nop + nop + + /* Restore registers */ + pop {r2 - r9} + mov pc, lr + .ltorg +ENDPROC(imx7d_ddr3_freq_change) diff --git a/arch/arm/mach-imx/ddrc.c b/arch/arm/mach-imx/ddrc.c new file mode 100644 index 000000000000..9c7f627d465e --- /dev/null +++ b/arch/arm/mach-imx/ddrc.c @@ -0,0 +1,86 @@ +/* + * Copyright 2015 Freescale Semiconductor, Inc. + * + * The code contained herein is licensed under the GNU General Public + * License. You may obtain a copy of the GNU General Public License + * Version 2 or later at the following locations: + * + * http://www.opensource.org/licenses/gpl-license.html + * http://www.gnu.org/copyleft/gpl.html + */ + +#include <linux/init.h> +#include <linux/io.h> +#include <linux/module.h> +#include <linux/of.h> +#include <linux/of_address.h> +#include <linux/of_device.h> + +#include "hardware.h" + +#define DDRC_MSTR 0x0 +#define BM_DDRC_MSTR_DDR3 0x1 +#define BM_DDRC_MSTR_LPDDR2 0x4 +#define BM_DDRC_MSTR_LPDDR3 0x8 + +static int ddr_type; + +static int imx_ddrc_probe(struct platform_device *pdev) +{ + struct device_node *np = pdev->dev.of_node; + void __iomem *ddrc_base, *reg; + u32 val; + + ddrc_base = of_iomap(np, 0); + WARN_ON(!ddrc_base); + + reg = ddrc_base + DDRC_MSTR; + /* Get ddr type */ + val = readl_relaxed(reg); + val &= (BM_DDRC_MSTR_DDR3 | BM_DDRC_MSTR_LPDDR2 + | BM_DDRC_MSTR_LPDDR3); + + switch (val) { + case BM_DDRC_MSTR_DDR3: + pr_info("DDR type is DDR3!\n"); + ddr_type = IMX_DDR_TYPE_DDR3; + break; + case BM_DDRC_MSTR_LPDDR2: + pr_info("DDR type is LPDDR2!\n"); + ddr_type = IMX_DDR_TYPE_LPDDR2; + break; + case BM_DDRC_MSTR_LPDDR3: + pr_info("DDR type is LPDDR3!\n"); + ddr_type = IMX_DDR_TYPE_LPDDR3; + break; + default: + break; + } + + return 0; +} + +int imx_ddrc_get_ddr_type(void) +{ + return ddr_type; +} + +static struct of_device_id imx_ddrc_dt_ids[] = { + { .compatible = "fsl,imx7-ddrc", }, + { /* sentinel */ } +}; + +static struct platform_driver imx_ddrc_driver = { + .driver = { + .name = "imx-ddrc", + .owner = THIS_MODULE, + .of_match_table = imx_ddrc_dt_ids, + }, + .probe = imx_ddrc_probe, +}; + +static int __init imx_ddrc_init(void) +{ + return platform_driver_register(&imx_ddrc_driver); +} +postcore_initcall(imx_ddrc_init); diff --git a/arch/arm/mach-imx/hardware.h b/arch/arm/mach-imx/hardware.h index 92c5a9c9f94b..ce8e8a39f051 100644 --- a/arch/arm/mach-imx/hardware.h +++ b/arch/arm/mach-imx/hardware.h @@ -81,13 +81,16 @@ * CCM 0x020c4000+0x004000 -> 0xf42c4000+0x004000 * ANATOP 0x020c8000+0x004000 -> 0xf42c8000+0x004000 * UART4 0x021f0000+0x004000 -> 0xf42f0000+0x004000 + * mx7d: + * CCM 0x30380000+0x010000 -> 0xf5380000+0x010000 + * ANATOP 0x30360000+0x010000 -> 0xf5360000+0x010000 + * UART1 0x30860000+0x010000 -> 0xf5860000+0x010000 */ #define IMX_IO_P2V(x) ( \ - (((x) & 0x80000000) >> 7) | \ (0xf4000000 + \ - (((x) & 0x50000000) >> 6) + \ - (((x) & 0x0b000000) >> 4) + \ - (((x) & 0x000fffff)))) + (((x) & 0x50000000) >> 4) + \ + (((x) & 0x0a000000) >> 4) + \ + (((x) & 0x00ffffff)))) #define IMX_IO_ADDRESS(x) IOMEM(IMX_IO_P2V(x)) @@ -99,6 +102,7 @@ #include "mx2x.h" #include "mx21.h" #include "mx27.h" +#include "mx7.h" #define imx_map_entry(soc, name, _type) { \ .virtual = soc ## _IO_P2V(soc ## _ ## name ## _BASE_ADDR), \ diff --git a/arch/arm/mach-imx/lpddr3_freq_imx.S b/arch/arm/mach-imx/lpddr3_freq_imx.S new file mode 100644 index 000000000000..80fb1184fa54 --- /dev/null +++ b/arch/arm/mach-imx/lpddr3_freq_imx.S @@ -0,0 +1,444 @@ +/* + * Copyright (C) 2015-2016 Freescale Semiconductor, Inc. All Rights Reserved. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + + * 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/linkage.h> +#include "hardware.h" + +#define DDRC_MSTR 0x0 +#define DDRC_STAT 0x4 +#define DDRC_PWRCTL 0x30 +#define DDRC_RFSHTMG 0x64 +#define DDRC_DBG1 0x304 +#define DDRC_PSTAT 0x3fc +#define DDRC_PCTRL_0 0x490 +#define DDRC_DFIMISC 0x1b0 +#define DDRC_DBGCAM 0x308 +#define DDRC_SWCTL 0x320 +#define DDRC_SWSTAT 0x324 +#define DDRPHY_LP_CON0 0x18 +#define IOMUXC_GPR8 0x20 +#define DDRPHY_PHY_CON1 0x4 +#define DDRPHY_MDLL_CON0 0xb0 +#define DDRPHY_MDLL_CON1 0xb4 +#define DDRPHY_OFFSETD_CON0 0x50 +#define DDRPHY_OFFSETR_CON0 0x20 +#define DDRPHY_OFFSETR_CON1 0x24 +#define DDRPHY_OFFSETR_CON2 0x28 +#define DDRPHY_OFFSETW_CON0 0x30 +#define DDRPHY_OFFSETW_CON1 0x34 +#define DDRPHY_OFFSETW_CON2 0x38 +#define DDRPHY_RFSHTMG 0x64 +#define DDRPHY_CA_WLDSKEW_CON0 0x6c +#define DDRPHY_CA_DSKEW_CON0 0x7c +#define DDRPHY_CA_DSKEW_CON1 0x80 +#define DDRPHY_CA_DSKEW_CON2 0x84 + +#define ANADIG_DIGPROG 0x800 + + .align 3 + + .macro ddrc_prepare + + /* disable port */ + ldr r7, =0x0 + str r7, [r4, #DDRC_PCTRL_0] + + /* wait port busy done */ + ldr r6, =0x10001 +1: + ldr r7, [r4, #DDRC_PSTAT] + and r7, r7, r6 + cmp r7, #0 + bne 1b + + ldr r7, =0x20 + str r7, [r4, #DDRC_PWRCTL] + + ldr r6, =0x23 +2: + ldr r7, [r4, #DDRC_STAT] + and r7, r7, r6 + cmp r7, r6 + bne 2b + + ldr r7, =0x1 + str r7, [r4, #DDRC_DBG1] + + ldr r6, =0x30000000 +3: + ldr r7, [r4, #DDRC_DBGCAM] + and r7, r7, r6 + cmp r7, r6 + bne 3b + + ldr r7, =0x0 + str r7, [r4, #DDRC_SWCTL] + + ldr r7, =0x0 + str r7, [r4, #DDRC_DFIMISC] + + ldr r7, =0x1 + str r7, [r4, #DDRC_SWCTL] + + ldr r6, =0x1 +4: + ldr r7, [r4, #DDRC_SWSTAT] + and r7, r7, r6 + cmp r7, r6 + bne 4b + + .endm + + .macro ddrc_done + + ldr r7, =0x0 + str r7, [r4, #DDRC_PWRCTL] + + ldr r6, =0x3 +5: + ldr r7, [r4, #DDRC_STAT] + and r7, r7, r6 + cmp r7, r6 + beq 5b + + ldr r7, =0x0 + str r7, [r4, #DDRC_DBG1] + + ldr r7, =0x1 + str r7, [r4, #DDRC_PCTRL_0] + + /* enable auto self-refresh */ + ldr r7, [r4, #DDRC_PWRCTL] + orr r7, r7, #(1 << 0) + str r7, [r4, #DDRC_PWRCTL] + + .endm + + .macro switch_to_below_100m + + /* LPDDR2 and LPDDR3 has different setting */ + ldr r8, [r4, #DDRC_MSTR] + ands r8, r8, #0x4 + bne 9f + + /* LPDDR3 */ + ldr r7, =0x00000100 + str r7, [r5, #DDRPHY_PHY_CON1] + b 10f +9: + /* LPDDR2 */ + ldr r7, =0x10010100 + str r7, [r5, #DDRPHY_PHY_CON1] +10: + ldr r6, =24000000 + cmp r0, r6 + beq 16f + + ldr r7, =0x0005000B + str r7, [r4, #DDRC_RFSHTMG] + b 6f +16: + ldr r7, =0x00010003 + str r7, [r4, #DDRC_RFSHTMG] + + /* dram alt sel set to OSC */ + ldr r7, =0x10000000 + ldr r8, =0xa080 + str r7, [r2, r8] + /* dram root set to from dram alt, div by 1 */ + ldr r7, =0x11000000 + ldr r8, =0x9880 + str r7, [r2, r8] + b 7f + +6: + /* dram alt sel set to pfd0_392m */ + ldr r7, =0x15000000 + ldr r8, =0xa080 + str r7, [r2, r8] + /* dram root set to from dram alt, div by 4 */ + ldr r7, =0x11000003 + ldr r8, =0x9880 + str r7, [r2, r8] +7: + ldr r7, =0x202ffd0 + str r7, [r5, #DDRPHY_MDLL_CON0] + + ldr r7, =0x7f + str r7, [r5, #DDRPHY_OFFSETD_CON0] + + ldr r7, =0x7f7f7f7f + str r7, [r5, #DDRPHY_OFFSETR_CON0] + str r7, [r5, #DDRPHY_OFFSETR_CON1] + ldr r7, =0x7f + str r7, [r5, #DDRPHY_OFFSETR_CON2] + + ldr r7, =0x7f7f7f7f + str r7, [r5, #DDRPHY_OFFSETW_CON0] + str r7, [r5, #DDRPHY_OFFSETW_CON1] + ldr r7, =0x7f + str r7, [r5, #DDRPHY_OFFSETW_CON2] + + ldr r7, [r9, #ANADIG_DIGPROG] + and r7, r7, #0x11 + cmp r7, #0x11 + bne 11f + + ldr r7, =0x0 + str r7, [r5, #DDRPHY_CA_WLDSKEW_CON0] + ldr r7, =0x60606060 + str r7, [r5, #DDRPHY_CA_DSKEW_CON0] + str r7, [r5, #DDRPHY_CA_DSKEW_CON1] + ldr r7, =0x00006060 + str r7, [r5, #DDRPHY_CA_DSKEW_CON2] + b 12f +11: + ldr r7, =0x0 + str r7, [r5, #DDRPHY_CA_DSKEW_CON0] + str r7, [r5, #DDRPHY_CA_DSKEW_CON1] + str r7, [r5, #DDRPHY_CA_DSKEW_CON2] +12: + ldr r7, =0x100007f + str r7, [r5, #DDRPHY_OFFSETD_CON0] + ldr r7, =0x7f + str r7, [r5, #DDRPHY_OFFSETD_CON0] + + .endm + + .macro switch_to_533m + + ldr r7, =0x10210100 + str r7, [r5, #DDRPHY_PHY_CON1] + + ldr r7, =0x00200038 + str r7, [r4, #DDRC_RFSHTMG] + + /* dram root set to from dram main, div by 2 */ + ldr r7, =0x10000001 + ldr r8, =0x9880 + str r7, [r2, r8] + + ldr r7, =0x1010007e + str r7, [r5, #DDRPHY_MDLL_CON0] + + ldr r7, =0x10000008 + str r7, [r5, #DDRPHY_OFFSETD_CON0] + + ldr r7, =0x08080808 + str r7, [r5, #DDRPHY_OFFSETR_CON0] + str r7, [r5, #DDRPHY_OFFSETR_CON1] + ldr r7, =0x8 + str r7, [r5, #DDRPHY_OFFSETR_CON2] + + ldr r7, =0x08080808 + str r7, [r5, #DDRPHY_OFFSETW_CON0] + str r7, [r5, #DDRPHY_OFFSETW_CON1] + ldr r7, =0x8 + str r7, [r5, #DDRPHY_OFFSETW_CON2] + + /* LPDDR2 and LPDDR3 has different setting */ + ldr r8, [r4, #DDRC_MSTR] + ands r8, r8, #0x4 + beq 15f + + ldr r7, [r9, #ANADIG_DIGPROG] + and r7, r7, #0x11 + cmp r7, #0x11 + bne 14f + + ldr r7, =0x08080808 + str r7, [r5, #DDRPHY_CA_DSKEW_CON0] + str r7, [r5, #DDRPHY_CA_DSKEW_CON1] + ldr r7, =0x0a0a0808 + str r7, [r5, #DDRPHY_CA_DSKEW_CON2] + ldr r7, =0x0a0a0a0a + str r7, [r5, #DDRPHY_CA_WLDSKEW_CON0] + b 14f +15: + ldr r7, [r9, #ANADIG_DIGPROG] + and r7, r7, #0x11 + cmp r7, #0x11 + bne 13f + + ldr r7, =0x1c1c1c1c + str r7, [r5, #DDRPHY_CA_DSKEW_CON0] + str r7, [r5, #DDRPHY_CA_DSKEW_CON1] + ldr r7, =0x30301c1c + str r7, [r5, #DDRPHY_CA_DSKEW_CON2] + ldr r7, =0x30303030 + str r7, [r5, #DDRPHY_CA_WLDSKEW_CON0] + b 14f +13: + ldr r7, =0x08080808 + str r7, [r5, #DDRPHY_CA_DSKEW_CON0] + str r7, [r5, #DDRPHY_CA_DSKEW_CON1] + ldr r7, =0x0808 + str r7, [r5, #DDRPHY_CA_DSKEW_CON2] +14: + ldr r7, =0x11000008 + str r7, [r5, #DDRPHY_OFFSETD_CON0] + ldr r7, =0x10000008 + str r7, [r5, #DDRPHY_OFFSETD_CON0] + + ldr r6, =0x4 +8: + ldr r7, [r5, #DDRPHY_MDLL_CON1] + and r7, r7, r6 + cmp r7, r6 + bne 8b + + .endm + +ENTRY(imx_lpddr3_freq_change) + push {r2 - r9} + + /* + * To ensure no page table walks occur in DDR, we + * have a another page table stored in IRAM that only + * contains entries pointing to IRAM, AIPS1 and AIPS2. + * We need to set the TTBR1 to the new IRAM TLB. + * Do the following steps: + * 1. Flush the Branch Target Address Cache (BTAC) + * 2. Set TTBR1 to point to IRAM page table. + * 3. Disable page table walks in TTBR0 (PD0 = 1) + * 4. Set TTBR0.N=1, implying 0-2G is translated by TTBR0 + * and 2-4G is translated by TTBR1. + */ + + ldr r6, =iram_tlb_phys_addr + ldr r7, [r6] + + /* Flush the Branch Target Address Cache (BTAC) */ + ldr r6, =0x0 + mcr p15, 0, r6, c7, c1, 6 + + /* Disable Branch Prediction, Z bit in SCTLR. */ + mrc p15, 0, r6, c1, c0, 0 + bic r6, r6, #0x800 + mcr p15, 0, r6, c1, c0, 0 + + dsb + isb + /* Store the IRAM table in TTBR1 */ + mcr p15, 0, r7, c2, c0, 1 + + /* Read TTBCR and set PD0=1, N = 1 */ + mrc p15, 0, r6, c2, c0, 2 + orr r6, r6, #0x11 + mcr p15, 0, r6, c2, c0, 2 + + dsb + isb + + /* flush the TLB */ + ldr r6, =0x0 + mcr p15, 0, r6, c8, c3, 0 + + /* Disable L1 data cache. */ + mrc p15, 0, r6, c1, c0, 0 + bic r6, r6, #0x4 + mcr p15, 0, r6, c1, c0, 0 + + dsb + isb + + ldr r2, =IMX_IO_P2V(MX7D_CCM_BASE_ADDR) + ldr r3, =IMX_IO_P2V(MX7D_IOMUXC_GPR_BASE_ADDR) + ldr r4, =IMX_IO_P2V(MX7D_DDRC_BASE_ADDR) + ldr r5, =IMX_IO_P2V(MX7D_DDRC_PHY_BASE_ADDR) + ldr r9, =IMX_IO_P2V(MX7D_ANATOP_BASE_ADDR) + + ddrc_prepare + + ldr r6, =100000000 + cmp r0, r6 + bgt set_to_533m + +set_to_below_100m: + switch_to_below_100m + b done + +set_to_533m: + switch_to_533m + b done + +done: + ddrc_done + + /* Enable L1 data cache. */ + mrc p15, 0, r6, c1, c0, 0 + orr r6, r6, #0x4 + mcr p15, 0, r6, c1, c0, 0 + + /* Restore the TTBCR */ + dsb + isb + + /* Read TTBCR and set PD0=0, N = 0 */ + mrc p15, 0, r6, c2, c0, 2 + bic r6, r6, #0x11 + mcr p15, 0, r6, c2, c0, 2 + dsb + isb + + /* flush the TLB */ + ldr r6, =0x0 + mcr p15, 0, r6, c8, c3, 0 + + dsb + isb + + /* Enable Branch Prediction, Z bit in SCTLR. */ + mrc p15, 0, r6, c1, c0, 0 + orr r6, r6, #0x800 + mcr p15, 0, r6, c1, c0, 0 + + /* Flush the Branch Target Address Cache (BTAC) */ + ldr r6, =0x0 + mcr p15, 0, r6, c7, c1, 6 + + nop + nop + nop + nop + nop + + nop + nop + nop + nop + nop + + nop + nop + nop + nop + nop + + nop + nop + nop + nop + nop + + nop + nop + nop + nop + nop + + /* Restore registers */ + pop {r2 - r9} + mov pc, lr +ENDPROC(imx_lpddr3_freq_change) diff --git a/arch/arm/mach-imx/mach-imx7d.c b/arch/arm/mach-imx/mach-imx7d.c index ebb27592a9f7..6baead31ec29 100644 --- a/arch/arm/mach-imx/mach-imx7d.c +++ b/arch/arm/mach-imx/mach-imx7d.c @@ -101,6 +101,13 @@ static void __init imx7d_init_irq(void) irqchip_init(); } +static void __init imx7d_map_io(void) +{ + debug_ll_io_init(); + imx7_pm_map_io(); + imx_busfreq_map_io(); +} + static const char *const imx7d_dt_compat[] __initconst = { "fsl,imx7d", "fsl,imx7s", @@ -108,6 +115,7 @@ static const char *const imx7d_dt_compat[] __initconst = { }; DT_MACHINE_START(IMX7D, "Freescale i.MX7 Dual (Device Tree)") + .map_io = imx7d_map_io, .init_irq = imx7d_init_irq, .init_machine = imx7d_init_machine, .init_late = imx7d_init_late, diff --git a/arch/arm/mach-imx/mx7.h b/arch/arm/mach-imx/mx7.h new file mode 100644 index 000000000000..afbeaef12d07 --- /dev/null +++ b/arch/arm/mach-imx/mx7.h @@ -0,0 +1,54 @@ +/* + * Copyright (C) 2015 Freescale Semiconductor, Inc. All Rights Reserved. + */ + +/* + * * This program is free software; you can redistribute it and/or modify + * * it under the terms of the GNU General Public License version 2 as + * * published by the Free Software Foundation. + * */ + +#ifndef __ASM_ARCH_MX7_IOMAP_H__ +#define __ASM_ARCH_MX7_IOMAP_H__ + +#define MX7D_IO_P2V(x) IMX_IO_P2V(x) +#define MX7D_IO_ADDRESS(x) IOMEM(MX7D_IO_P2V(x)) + +#define MX7D_LPSR_BASE_ADDR 0x30270000 +#define MX7D_LPSR_SIZE 0x10000 +#define MX7D_CCM_BASE_ADDR 0x30380000 +#define MX7D_CCM_SIZE 0x10000 +#define MX7D_IOMUXC_BASE_ADDR 0x30330000 +#define MX7D_IOMUXC_SIZE 0x10000 +#define MX7D_IOMUXC_GPR_BASE_ADDR 0x30340000 +#define MX7D_IOMUXC_GPR_SIZE 0x10000 +#define MX7D_ANATOP_BASE_ADDR 0x30360000 +#define MX7D_ANATOP_SIZE 0x10000 +#define MX7D_SNVS_BASE_ADDR 0x30370000 +#define MX7D_SNVS_SIZE 0x10000 +#define MX7D_GPC_BASE_ADDR 0x303a0000 +#define MX7D_GPC_SIZE 0x10000 +#define MX7D_SRC_BASE_ADDR 0x30390000 +#define MX7D_SRC_SIZE 0x10000 +#define MX7D_DDRC_BASE_ADDR 0x307a0000 +#define MX7D_DDRC_SIZE 0x10000 +#define MX7D_DDRC_PHY_BASE_ADDR 0x30790000 +#define MX7D_DDRC_PHY_SIZE 0x10000 +#define MX7D_AIPS1_BASE_ADDR 0x30000000 +#define MX7D_AIPS1_SIZE 0x400000 +#define MX7D_AIPS2_BASE_ADDR 0x30400000 +#define MX7D_AIPS2_SIZE 0x400000 +#define MX7D_AIPS3_BASE_ADDR 0x30900000 +#define MX7D_AIPS3_SIZE 0x300000 +#define MX7D_GIC_BASE_ADDR 0x31000000 +#define MX7D_GIC_SIZE 0x100000 + +#define TT_ATTRIB_NON_CACHEABLE_1M 0x802 +#define MX7_IRAM_TLB_SIZE 0x4000 +#define MX7_SUSPEND_OCRAM_SIZE 0x1000 +#define MX7_CPUIDLE_OCRAM_ADDR_OFFSET 0x1000 +#define MX7_CPUIDLE_OCRAM_SIZE 0x1000 +#define MX7_BUSFREQ_OCRAM_ADDR_OFFSET 0x2000 +#define MX7_BUSFREQ_OCRAM_SIZE 0x1000 + +#endif diff --git a/arch/arm/mach-imx/mxc.h b/arch/arm/mach-imx/mxc.h index 2bfd2d59b4a6..33d560c6f0b1 100644 --- a/arch/arm/mach-imx/mxc.h +++ b/arch/arm/mach-imx/mxc.h @@ -33,7 +33,9 @@ #define MXC_CPU_IMX7D 0x72 #define MXC_CPU_IMX7ULP 0xff +#define IMX_DDR_TYPE_DDR3 0 #define IMX_DDR_TYPE_LPDDR2 1 +#define IMX_DDR_TYPE_LPDDR3 2 #ifndef __ASSEMBLY__ extern unsigned int __mxc_cpu_type; diff --git a/arch/arm/mach-imx/pm-imx7.c b/arch/arm/mach-imx/pm-imx7.c new file mode 100644 index 000000000000..a1e3084798f5 --- /dev/null +++ b/arch/arm/mach-imx/pm-imx7.c @@ -0,0 +1,148 @@ +/* + * Copyright (C) 2015 Freescale Semiconductor, Inc. + * + * The code contained herein is licensed under the GNU General Public + * License. You may obtain a copy of the GNU General Public License + * Version 2 or later at the following locations: + * + * http://www.opensource.org/licenses/gpl-license.html + * http://www.gnu.org/copyleft/gpl.html + */ + +#include <linux/busfreq-imx.h> +#include <linux/init.h> +#include <linux/io.h> +#include <linux/of.h> +#include <linux/of_address.h> +#include <linux/slab.h> +#include <linux/of.h> +#include <linux/of_fdt.h> +#include <linux/of_platform.h> +#include <asm/cacheflush.h> +#include <asm/mach/map.h> +#include <asm/proc-fns.h> +#include <asm/tlb.h> + +#include "common.h" +#include "hardware.h" + +#define M4_OCRAMS_RESERVED_SIZE 0xc + +extern unsigned long iram_tlb_base_addr; +extern unsigned long iram_tlb_phys_addr; + +static struct map_desc imx7_pm_io_desc[] __initdata = { + imx_map_entry(MX7D, AIPS1, MT_DEVICE), + imx_map_entry(MX7D, AIPS2, MT_DEVICE), + imx_map_entry(MX7D, AIPS3, MT_DEVICE), +}; + +static const char * const low_power_ocram_match[] __initconst = { + "fsl,lpm-sram", + NULL +}; + +static struct map_desc iram_tlb_io_desc __initdata = { + /* .virtual and .pfn are run-time assigned */ + .length = SZ_1M, + .type = MT_MEMORY_RWX_NONCACHED, +}; + +static int __init imx7_dt_find_lpsram(unsigned long node, const char *uname, + int depth, void *data) +{ + unsigned long lpram_addr; + const __be32 *prop = of_get_flat_dt_prop(node, "reg", NULL); + + if (of_flat_dt_match(node, low_power_ocram_match)) { + if (!prop) + return -EINVAL; + + lpram_addr = be32_to_cpup(prop); + + /* We need to create a 1M page table entry. */ + iram_tlb_io_desc.virtual = IMX_IO_P2V(lpram_addr & 0xFFF00000); + iram_tlb_io_desc.pfn = __phys_to_pfn(lpram_addr & 0xFFF00000); + iram_tlb_phys_addr = lpram_addr; + iram_tlb_base_addr = IMX_IO_P2V(lpram_addr); + iotable_init(&iram_tlb_io_desc, 1); + } + + return 0; +} + +void __init imx7_pm_map_io(void) +{ + unsigned long i, j; + + iotable_init(imx7_pm_io_desc, ARRAY_SIZE(imx7_pm_io_desc)); + /* + * Get the address of IRAM or OCRAM to be used by the low + * power code from the device tree. + */ + WARN_ON(of_scan_flat_dt(imx7_dt_find_lpsram, NULL)); + + /* Return if no IRAM space is allocated for suspend/resume code. */ + if (!iram_tlb_base_addr) { + pr_warn("No valid ocram available for suspend/resume!\n"); + return; + } + + /* TODO: Handle M4 in TEE? */ + /* Set all entries to 0 except first 3 words reserved for M4. */ + memset((void *)(iram_tlb_base_addr + M4_OCRAMS_RESERVED_SIZE), + 0, MX7_IRAM_TLB_SIZE - M4_OCRAMS_RESERVED_SIZE); + + /* + * Make sure the IRAM virtual address has a mapping in the IRAM + * page table. + * + * Only use the top 12 bits [31-20] when storing the physical + * address in the page table as only these bits are required + * for 1M mapping. + */ + j = ((iram_tlb_base_addr >> 20) << 2) / 4; + *((unsigned long *)iram_tlb_base_addr + j) = + (iram_tlb_phys_addr & 0xFFF00000) | TT_ATTRIB_NON_CACHEABLE_1M; + + /* + * Make sure the AIPS1 virtual address has a mapping in the + * IRAM page table. + */ + for (i = 0; i < 4; i++) { + j = ((IMX_IO_P2V(MX7D_AIPS1_BASE_ADDR + i * 0x100000) >> 20) << 2) / 4; + *((unsigned long *)iram_tlb_base_addr + j) = + ((MX7D_AIPS1_BASE_ADDR + i * 0x100000) & 0xFFF00000) | + TT_ATTRIB_NON_CACHEABLE_1M; + } + + /* + * Make sure the AIPS2 virtual address has a mapping in the + * IRAM page table. + */ + for (i = 0; i < 4; i++) { + j = ((IMX_IO_P2V(MX7D_AIPS2_BASE_ADDR + i * 0x100000) >> 20) << 2) / 4; + *((unsigned long *)iram_tlb_base_addr + j) = + ((MX7D_AIPS2_BASE_ADDR + i * 0x100000) & 0xFFF00000) | + TT_ATTRIB_NON_CACHEABLE_1M; + } + + /* + * Make sure the AIPS3 virtual address has a mapping + * in the IRAM page table. + */ + for (i = 0; i < 4; i++) { + j = ((IMX_IO_P2V(MX7D_AIPS3_BASE_ADDR + i * 0x100000) >> 20) << 2) / 4; + *((unsigned long *)iram_tlb_base_addr + j) = + ((MX7D_AIPS3_BASE_ADDR + i * 0x100000) & 0xFFF00000) | + TT_ATTRIB_NON_CACHEABLE_1M; + } + + /* + * Make sure the GIC virtual address has a mapping in the + * IRAM page table. + */ + j = ((IMX_IO_P2V(MX7D_GIC_BASE_ADDR) >> 20) << 2) / 4; + *((unsigned long *)iram_tlb_base_addr + j) = + (MX7D_GIC_BASE_ADDR & 0xFFF00000) | TT_ATTRIB_NON_CACHEABLE_1M; +} diff --git a/arch/arm/mach-imx/smp_wfe.S b/arch/arm/mach-imx/smp_wfe.S new file mode 100644 index 000000000000..08894bb39c4d --- /dev/null +++ b/arch/arm/mach-imx/smp_wfe.S @@ -0,0 +1,110 @@ +/* + * Copyright (C) 2015 Freescale Semiconductor, Inc. All Rights Reserved. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + + * 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/linkage.h> +#include <asm/smp_scu.h> +#include "hardware.h" + + .macro disable_l1_dcache + + /* + * Flush all data from the L1 data cache before disabling + * SCTLR.C bit. + */ + push {r0 - r10, lr} + ldr r7, =v7_flush_dcache_all + mov lr, pc + mov pc, r7 + pop {r0 - r10, lr} + + /* disable d-cache */ + mrc p15, 0, r7, c1, c0, 0 + bic r7, r7, #(1 << 2) + mcr p15, 0, r7, c1, c0, 0 + dsb + isb + + push {r0 - r10, lr} + ldr r7, =v7_flush_dcache_all + mov lr, pc + mov pc, r7 + pop {r0 - r10, lr} + + .endm + +#ifdef CONFIG_SMP + .align 3 + +ENTRY(imx7_smp_wfe) + push {r4 - r11, lr} + + dsb + isb + + disable_l1_dcache + + isb + + /* Turn off SMP bit. */ + mrc p15, 0, r8, c1, c0, 1 + bic r8, r8, #0x40 + mcr p15, 0, r8, c1, c0, 1 + + isb + /* Set flag of entering WFE. */ + mov r7, #0xff + lsl r7, r7, r0 + mov r6, #SCU_PM_DORMANT + lsl r6, r6, r0 + ldr r8, [r1, #0x4] + bic r8, r8, r7 + orr r6, r6, r8 + str r6, [r1, #0x4] + +go_back_wfe: + wfe + + /* Offset 0x0 stores busfeq done flag */ + ldr r6, [r1] + cmp r6, #1 + beq go_back_wfe + + /* Turn ON SMP bit. */ + mrc p15, 0, r8, c1, c0, 1 + orr r8, r8, #0x40 + mcr p15, 0, r8, c1, c0, 1 + + isb + /* Enable L1 data cache. */ + mrc p15, 0, r8, c1, c0, 0 + orr r8, r8, #0x4 + mcr p15, 0, r8, c1, c0, 0 + isb + + /* Set flag of exiting WFE. */ + mov r7, #0xff + lsl r7, r7, r0 + mov r6, #SCU_PM_NORMAL + lsl r6, r6, r0 + ldr r8, [r1, #0x4] + bic r8, r8, r7 + orr r6, r6, r8 + str r6, [r1, #0x4] + + /* Pop all saved registers. */ + pop {r4 - r11, lr} + mov pc, lr + .ltorg +ENDPROC(imx7_smp_wfe) +#endif |