[PATCH] soc: bcm: brcmstb: Remove bare-metal ARM suspend/resume code
Florian Fainelli
f.fainelli at gmail.com
Fri Feb 24 13:52:39 PST 2023
Since 2018 these platforms have supported entry via the ARM Trusted
Firmware using the standard PSCI SYSTEM_SUSPEND function calls. Remove
this legacy code.
Signed-off-by: Florian Fainelli <f.fainelli at gmail.com>
---
drivers/soc/bcm/brcmstb/Kconfig | 4 +-
drivers/soc/bcm/brcmstb/pm/Makefile | 1 -
drivers/soc/bcm/brcmstb/pm/aon_defs.h | 105 ----
drivers/soc/bcm/brcmstb/pm/pm-arm.c | 874 --------------------------
drivers/soc/bcm/brcmstb/pm/s2-arm.S | 69 --
5 files changed, 1 insertion(+), 1052 deletions(-)
delete mode 100644 drivers/soc/bcm/brcmstb/pm/aon_defs.h
delete mode 100644 drivers/soc/bcm/brcmstb/pm/pm-arm.c
delete mode 100644 drivers/soc/bcm/brcmstb/pm/s2-arm.S
diff --git a/drivers/soc/bcm/brcmstb/Kconfig b/drivers/soc/bcm/brcmstb/Kconfig
index 38e476905d96..c68d0e5267c4 100644
--- a/drivers/soc/bcm/brcmstb/Kconfig
+++ b/drivers/soc/bcm/brcmstb/Kconfig
@@ -4,8 +4,6 @@ if SOC_BRCMSTB
config BRCMSTB_PM
bool "Support suspend/resume for STB platforms"
default y
- depends on PM
- depends on ARCH_BRCMSTB || BMIPS_GENERIC
- select ARM_CPU_SUSPEND if ARM
+ depends on PM && BMIPS_GENERIC
endif # SOC_BRCMSTB
diff --git a/drivers/soc/bcm/brcmstb/pm/Makefile b/drivers/soc/bcm/brcmstb/pm/Makefile
index f849cfa69446..9133a9ee0782 100644
--- a/drivers/soc/bcm/brcmstb/pm/Makefile
+++ b/drivers/soc/bcm/brcmstb/pm/Makefile
@@ -1,3 +1,2 @@
# SPDX-License-Identifier: GPL-2.0-only
-obj-$(CONFIG_ARM) += s2-arm.o pm-arm.o
obj-$(CONFIG_BMIPS_GENERIC) += s2-mips.o s3-mips.o pm-mips.o
diff --git a/drivers/soc/bcm/brcmstb/pm/aon_defs.h b/drivers/soc/bcm/brcmstb/pm/aon_defs.h
deleted file mode 100644
index f695262ac930..000000000000
--- a/drivers/soc/bcm/brcmstb/pm/aon_defs.h
+++ /dev/null
@@ -1,105 +0,0 @@
-/* SPDX-License-Identifier: GPL-2.0-only */
-/*
- * Always ON (AON) register interface between bootloader and Linux
- *
- * Copyright © 2014-2017 Broadcom
- */
-
-#ifndef __BRCMSTB_AON_DEFS_H__
-#define __BRCMSTB_AON_DEFS_H__
-
-#include <linux/compiler.h>
-
-/* Magic number in upper 16-bits */
-#define BRCMSTB_S3_MAGIC_MASK 0xffff0000
-#define BRCMSTB_S3_MAGIC_SHORT 0x5AFE0000
-
-enum {
- /* Restore random key for AES memory verification (off = fixed key) */
- S3_FLAG_LOAD_RANDKEY = (1 << 0),
-
- /* Scratch buffer page table is present */
- S3_FLAG_SCRATCH_BUFFER_TABLE = (1 << 1),
-
- /* Skip all memory verification */
- S3_FLAG_NO_MEM_VERIFY = (1 << 2),
-
- /*
- * Modification of this bit reserved for bootloader only.
- * 1=PSCI started Linux, 0=Direct jump to Linux.
- */
- S3_FLAG_PSCI_BOOT = (1 << 3),
-
- /*
- * Modification of this bit reserved for bootloader only.
- * 1=64 bit boot, 0=32 bit boot.
- */
- S3_FLAG_BOOTED64 = (1 << 4),
-};
-
-#define BRCMSTB_HASH_LEN (128 / 8) /* 128-bit hash */
-
-#define AON_REG_MAGIC_FLAGS 0x00
-#define AON_REG_CONTROL_LOW 0x04
-#define AON_REG_CONTROL_HIGH 0x08
-#define AON_REG_S3_HASH 0x0c /* hash of S3 params */
-#define AON_REG_CONTROL_HASH_LEN 0x1c
-#define AON_REG_PANIC 0x20
-
-#define BRCMSTB_S3_MAGIC 0x5AFEB007
-#define BRCMSTB_PANIC_MAGIC 0x512E115E
-#define BOOTLOADER_SCRATCH_SIZE 64
-#define BRCMSTB_DTU_STATE_MAP_ENTRIES (8*1024)
-#define BRCMSTB_DTU_CONFIG_ENTRIES (512)
-#define BRCMSTB_DTU_COUNT (2)
-
-#define IMAGE_DESCRIPTORS_BUFSIZE (2 * 1024)
-#define S3_BOOTLOADER_RESERVED (S3_FLAG_PSCI_BOOT | S3_FLAG_BOOTED64)
-
-struct brcmstb_bootloader_dtu_table {
- uint32_t dtu_state_map[BRCMSTB_DTU_STATE_MAP_ENTRIES];
- uint32_t dtu_config[BRCMSTB_DTU_CONFIG_ENTRIES];
-};
-
-/*
- * Bootloader utilizes a custom parameter block left in DRAM for handling S3
- * warm resume
- */
-struct brcmstb_s3_params {
- /* scratch memory for bootloader */
- uint8_t scratch[BOOTLOADER_SCRATCH_SIZE];
-
- uint32_t magic; /* BRCMSTB_S3_MAGIC */
- uint64_t reentry; /* PA */
-
- /* descriptors */
- uint32_t hash[BRCMSTB_HASH_LEN / 4];
-
- /*
- * If 0, then ignore this parameter (there is only one set of
- * descriptors)
- *
- * If non-0, then a second set of descriptors is stored at:
- *
- * descriptors + desc_offset_2
- *
- * The MAC result of both descriptors is XOR'd and stored in @hash
- */
- uint32_t desc_offset_2;
-
- /*
- * (Physical) address of a brcmstb_bootloader_scratch_table, for
- * providing a large DRAM buffer to the bootloader
- */
- uint64_t buffer_table;
-
- uint32_t spare[70];
-
- uint8_t descriptors[IMAGE_DESCRIPTORS_BUFSIZE];
- /*
- * Must be last member of struct. See brcmstb_pm_s3_finish() for reason.
- */
- struct brcmstb_bootloader_dtu_table dtu[BRCMSTB_DTU_COUNT];
-} __packed;
-
-#endif /* __BRCMSTB_AON_DEFS_H__ */
diff --git a/drivers/soc/bcm/brcmstb/pm/pm-arm.c b/drivers/soc/bcm/brcmstb/pm/pm-arm.c
deleted file mode 100644
index d681cd24c6e1..000000000000
--- a/drivers/soc/bcm/brcmstb/pm/pm-arm.c
+++ /dev/null
@@ -1,874 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0-only
-/*
- * ARM-specific support for Broadcom STB S2/S3/S5 power management
- *
- * S2: clock gate CPUs and as many peripherals as possible
- * S3: power off all of the chip except the Always ON (AON) island; keep DDR is
- * self-refresh
- * S5: (a.k.a. S3 cold boot) much like S3, except DDR is powered down, so we
- * treat this mode like a soft power-off, with wakeup allowed from AON
- *
- * Copyright © 2014-2017 Broadcom
- */
-
-#define pr_fmt(fmt) "brcmstb-pm: " fmt
-
-#include <linux/bitops.h>
-#include <linux/compiler.h>
-#include <linux/delay.h>
-#include <linux/dma-mapping.h>
-#include <linux/err.h>
-#include <linux/init.h>
-#include <linux/io.h>
-#include <linux/ioport.h>
-#include <linux/kconfig.h>
-#include <linux/kernel.h>
-#include <linux/memblock.h>
-#include <linux/module.h>
-#include <linux/of.h>
-#include <linux/of_address.h>
-#include <linux/panic_notifier.h>
-#include <linux/platform_device.h>
-#include <linux/pm.h>
-#include <linux/printk.h>
-#include <linux/proc_fs.h>
-#include <linux/sizes.h>
-#include <linux/slab.h>
-#include <linux/sort.h>
-#include <linux/suspend.h>
-#include <linux/types.h>
-#include <linux/uaccess.h>
-#include <linux/soc/brcmstb/brcmstb.h>
-
-#include <asm/fncpy.h>
-#include <asm/setup.h>
-#include <asm/suspend.h>
-
-#include "pm.h"
-#include "aon_defs.h"
-
-#define SHIMPHY_DDR_PAD_CNTRL 0x8c
-
-/* Method #0 */
-#define SHIMPHY_PAD_PLL_SEQUENCE BIT(8)
-#define SHIMPHY_PAD_GATE_PLL_S3 BIT(9)
-
-/* Method #1 */
-#define PWRDWN_SEQ_NO_SEQUENCING 0
-#define PWRDWN_SEQ_HOLD_CHANNEL 1
-#define PWRDWN_SEQ_RESET_PLL 2
-#define PWRDWN_SEQ_POWERDOWN_PLL 3
-
-#define SHIMPHY_PAD_S3_PWRDWN_SEQ_MASK 0x00f00000
-#define SHIMPHY_PAD_S3_PWRDWN_SEQ_SHIFT 20
-
-#define DDR_FORCE_CKE_RST_N BIT(3)
-#define DDR_PHY_RST_N BIT(2)
-#define DDR_PHY_CKE BIT(1)
-
-#define DDR_PHY_NO_CHANNEL 0xffffffff
-
-#define MAX_NUM_MEMC 3
-
-struct brcmstb_memc {
- void __iomem *ddr_phy_base;
- void __iomem *ddr_shimphy_base;
- void __iomem *ddr_ctrl;
-};
-
-struct brcmstb_pm_control {
- void __iomem *aon_ctrl_base;
- void __iomem *aon_sram;
- struct brcmstb_memc memcs[MAX_NUM_MEMC];
-
- void __iomem *boot_sram;
- size_t boot_sram_len;
-
- bool support_warm_boot;
- size_t pll_status_offset;
- int num_memc;
-
- struct brcmstb_s3_params *s3_params;
- dma_addr_t s3_params_pa;
- int s3entry_method;
- u32 warm_boot_offset;
- u32 phy_a_standby_ctrl_offs;
- u32 phy_b_standby_ctrl_offs;
- bool needs_ddr_pad;
- struct platform_device *pdev;
-};
-
-enum bsp_initiate_command {
- BSP_CLOCK_STOP = 0x00,
- BSP_GEN_RANDOM_KEY = 0x4A,
- BSP_RESTORE_RANDOM_KEY = 0x55,
- BSP_GEN_FIXED_KEY = 0x63,
-};
-
-#define PM_INITIATE 0x01
-#define PM_INITIATE_SUCCESS 0x00
-#define PM_INITIATE_FAIL 0xfe
-
-static struct brcmstb_pm_control ctrl;
-
-noinline int brcmstb_pm_s3_finish(void);
-
-static int (*brcmstb_pm_do_s2_sram)(void __iomem *aon_ctrl_base,
- void __iomem *ddr_phy_pll_status);
-
-static int brcmstb_init_sram(struct device_node *dn)
-{
- void __iomem *sram;
- struct resource res;
- int ret;
-
- ret = of_address_to_resource(dn, 0, &res);
- if (ret)
- return ret;
-
- /* Uncached, executable remapping of SRAM */
- sram = __arm_ioremap_exec(res.start, resource_size(&res), false);
- if (!sram)
- return -ENOMEM;
-
- ctrl.boot_sram = sram;
- ctrl.boot_sram_len = resource_size(&res);
-
- return 0;
-}
-
-static const struct of_device_id sram_dt_ids[] = {
- { .compatible = "mmio-sram" },
- { /* sentinel */ }
-};
-
-static int do_bsp_initiate_command(enum bsp_initiate_command cmd)
-{
- void __iomem *base = ctrl.aon_ctrl_base;
- int ret;
- int timeo = 1000 * 1000; /* 1 second */
-
- writel_relaxed(0, base + AON_CTRL_PM_INITIATE);
- (void)readl_relaxed(base + AON_CTRL_PM_INITIATE);
-
- /* Go! */
- writel_relaxed((cmd << 1) | PM_INITIATE, base + AON_CTRL_PM_INITIATE);
-
- /*
- * If firmware doesn't support the 'ack', then just assume it's done
- * after 10ms. Note that this only works for command 0, BSP_CLOCK_STOP
- */
- if (of_machine_is_compatible("brcm,bcm74371a0")) {
- (void)readl_relaxed(base + AON_CTRL_PM_INITIATE);
- mdelay(10);
- return 0;
- }
-
- for (;;) {
- ret = readl_relaxed(base + AON_CTRL_PM_INITIATE);
- if (!(ret & PM_INITIATE))
- break;
- if (timeo <= 0) {
- pr_err("error: timeout waiting for BSP (%x)\n", ret);
- break;
- }
- timeo -= 50;
- udelay(50);
- }
-
- return (ret & 0xff) != PM_INITIATE_SUCCESS;
-}
-
-static int brcmstb_pm_handshake(void)
-{
- void __iomem *base = ctrl.aon_ctrl_base;
- u32 tmp;
- int ret;
-
- /* BSP power handshake, v1 */
- tmp = readl_relaxed(base + AON_CTRL_HOST_MISC_CMDS);
- tmp &= ~1UL;
- writel_relaxed(tmp, base + AON_CTRL_HOST_MISC_CMDS);
- (void)readl_relaxed(base + AON_CTRL_HOST_MISC_CMDS);
-
- ret = do_bsp_initiate_command(BSP_CLOCK_STOP);
- if (ret)
- pr_err("BSP handshake failed\n");
-
- /*
- * HACK: BSP may have internal race on the CLOCK_STOP command.
- * Avoid touching the BSP for a few milliseconds.
- */
- mdelay(3);
-
- return ret;
-}
-
-static inline void shimphy_set(u32 value, u32 mask)
-{
- int i;
-
- if (!ctrl.needs_ddr_pad)
- return;
-
- for (i = 0; i < ctrl.num_memc; i++) {
- u32 tmp;
-
- tmp = readl_relaxed(ctrl.memcs[i].ddr_shimphy_base +
- SHIMPHY_DDR_PAD_CNTRL);
- tmp = value | (tmp & mask);
- writel_relaxed(tmp, ctrl.memcs[i].ddr_shimphy_base +
- SHIMPHY_DDR_PAD_CNTRL);
- }
- wmb(); /* Complete sequence in order. */
-}
-
-static inline void ddr_ctrl_set(bool warmboot)
-{
- int i;
-
- for (i = 0; i < ctrl.num_memc; i++) {
- u32 tmp;
-
- tmp = readl_relaxed(ctrl.memcs[i].ddr_ctrl +
- ctrl.warm_boot_offset);
- if (warmboot)
- tmp |= 1;
- else
- tmp &= ~1; /* Cold boot */
- writel_relaxed(tmp, ctrl.memcs[i].ddr_ctrl +
- ctrl.warm_boot_offset);
- }
- /* Complete sequence in order */
- wmb();
-}
-
-static inline void s3entry_method0(void)
-{
- shimphy_set(SHIMPHY_PAD_GATE_PLL_S3 | SHIMPHY_PAD_PLL_SEQUENCE,
- 0xffffffff);
-}
-
-static inline void s3entry_method1(void)
-{
- /*
- * S3 Entry Sequence
- * -----------------
- * Step 1: SHIMPHY_ADDR_CNTL_0_DDR_PAD_CNTRL [ S3_PWRDWN_SEQ ] = 3
- * Step 2: MEMC_DDR_0_WARM_BOOT [ WARM_BOOT ] = 1
- */
- shimphy_set((PWRDWN_SEQ_POWERDOWN_PLL <<
- SHIMPHY_PAD_S3_PWRDWN_SEQ_SHIFT),
- ~SHIMPHY_PAD_S3_PWRDWN_SEQ_MASK);
-
- ddr_ctrl_set(true);
-}
-
-static inline void s5entry_method1(void)
-{
- int i;
-
- /*
- * S5 Entry Sequence
- * -----------------
- * Step 1: SHIMPHY_ADDR_CNTL_0_DDR_PAD_CNTRL [ S3_PWRDWN_SEQ ] = 3
- * Step 2: MEMC_DDR_0_WARM_BOOT [ WARM_BOOT ] = 0
- * Step 3: DDR_PHY_CONTROL_REGS_[AB]_0_STANDBY_CONTROL[ CKE ] = 0
- * DDR_PHY_CONTROL_REGS_[AB]_0_STANDBY_CONTROL[ RST_N ] = 0
- */
- shimphy_set((PWRDWN_SEQ_POWERDOWN_PLL <<
- SHIMPHY_PAD_S3_PWRDWN_SEQ_SHIFT),
- ~SHIMPHY_PAD_S3_PWRDWN_SEQ_MASK);
-
- ddr_ctrl_set(false);
-
- for (i = 0; i < ctrl.num_memc; i++) {
- u32 tmp;
-
- /* Step 3: Channel A (RST_N = CKE = 0) */
- tmp = readl_relaxed(ctrl.memcs[i].ddr_phy_base +
- ctrl.phy_a_standby_ctrl_offs);
- tmp &= ~(DDR_PHY_RST_N | DDR_PHY_RST_N);
- writel_relaxed(tmp, ctrl.memcs[i].ddr_phy_base +
- ctrl.phy_a_standby_ctrl_offs);
-
- /* Step 3: Channel B? */
- if (ctrl.phy_b_standby_ctrl_offs != DDR_PHY_NO_CHANNEL) {
- tmp = readl_relaxed(ctrl.memcs[i].ddr_phy_base +
- ctrl.phy_b_standby_ctrl_offs);
- tmp &= ~(DDR_PHY_RST_N | DDR_PHY_RST_N);
- writel_relaxed(tmp, ctrl.memcs[i].ddr_phy_base +
- ctrl.phy_b_standby_ctrl_offs);
- }
- }
- /* Must complete */
- wmb();
-}
-
-/*
- * Run a Power Management State Machine (PMSM) shutdown command and put the CPU
- * into a low-power mode
- */
-static void brcmstb_do_pmsm_power_down(unsigned long base_cmd, bool onewrite)
-{
- void __iomem *base = ctrl.aon_ctrl_base;
-
- if ((ctrl.s3entry_method == 1) && (base_cmd == PM_COLD_CONFIG))
- s5entry_method1();
-
- /* pm_start_pwrdn transition 0->1 */
- writel_relaxed(base_cmd, base + AON_CTRL_PM_CTRL);
-
- if (!onewrite) {
- (void)readl_relaxed(base + AON_CTRL_PM_CTRL);
-
- writel_relaxed(base_cmd | PM_PWR_DOWN, base + AON_CTRL_PM_CTRL);
- (void)readl_relaxed(base + AON_CTRL_PM_CTRL);
- }
- wfi();
-}
-
-/* Support S5 cold boot out of "poweroff" */
-static void brcmstb_pm_poweroff(void)
-{
- brcmstb_pm_handshake();
-
- /* Clear magic S3 warm-boot value */
- writel_relaxed(0, ctrl.aon_sram + AON_REG_MAGIC_FLAGS);
- (void)readl_relaxed(ctrl.aon_sram + AON_REG_MAGIC_FLAGS);
-
- /* Skip wait-for-interrupt signal; just use a countdown */
- writel_relaxed(0x10, ctrl.aon_ctrl_base + AON_CTRL_PM_CPU_WAIT_COUNT);
- (void)readl_relaxed(ctrl.aon_ctrl_base + AON_CTRL_PM_CPU_WAIT_COUNT);
-
- if (ctrl.s3entry_method == 1) {
- shimphy_set((PWRDWN_SEQ_POWERDOWN_PLL <<
- SHIMPHY_PAD_S3_PWRDWN_SEQ_SHIFT),
- ~SHIMPHY_PAD_S3_PWRDWN_SEQ_MASK);
- ddr_ctrl_set(false);
- brcmstb_do_pmsm_power_down(M1_PM_COLD_CONFIG, true);
- return; /* We should never actually get here */
- }
-
- brcmstb_do_pmsm_power_down(PM_COLD_CONFIG, false);
-}
-
-static void *brcmstb_pm_copy_to_sram(void *fn, size_t len)
-{
- unsigned int size = ALIGN(len, FNCPY_ALIGN);
-
- if (ctrl.boot_sram_len < size) {
- pr_err("standby code will not fit in SRAM\n");
- return NULL;
- }
-
- return fncpy(ctrl.boot_sram, fn, size);
-}
-
-/*
- * S2 suspend/resume picks up where we left off, so we must execute carefully
- * from SRAM, in order to allow DDR to come back up safely before we continue.
- */
-static int brcmstb_pm_s2(void)
-{
- /* A previous S3 can set a value hazardous to S2, so make sure. */
- if (ctrl.s3entry_method == 1) {
- shimphy_set((PWRDWN_SEQ_NO_SEQUENCING <<
- SHIMPHY_PAD_S3_PWRDWN_SEQ_SHIFT),
- ~SHIMPHY_PAD_S3_PWRDWN_SEQ_MASK);
- ddr_ctrl_set(false);
- }
-
- brcmstb_pm_do_s2_sram = brcmstb_pm_copy_to_sram(&brcmstb_pm_do_s2,
- brcmstb_pm_do_s2_sz);
- if (!brcmstb_pm_do_s2_sram)
- return -EINVAL;
-
- return brcmstb_pm_do_s2_sram(ctrl.aon_ctrl_base,
- ctrl.memcs[0].ddr_phy_base +
- ctrl.pll_status_offset);
-}
-
-/*
- * This function is called on a new stack, so don't allow inlining (which will
- * generate stack references on the old stack). It cannot be made static because
- * it is referenced from brcmstb_pm_s3()
- */
-noinline int brcmstb_pm_s3_finish(void)
-{
- struct brcmstb_s3_params *params = ctrl.s3_params;
- dma_addr_t params_pa = ctrl.s3_params_pa;
- phys_addr_t reentry = virt_to_phys(&cpu_resume_arm);
- enum bsp_initiate_command cmd;
- u32 flags;
-
- /*
- * Clear parameter structure, but not DTU area, which has already been
- * filled in. We know DTU is a the end, so we can just subtract its
- * size.
- */
- memset(params, 0, sizeof(*params) - sizeof(params->dtu));
-
- flags = readl_relaxed(ctrl.aon_sram + AON_REG_MAGIC_FLAGS);
-
- flags &= S3_BOOTLOADER_RESERVED;
- flags |= S3_FLAG_NO_MEM_VERIFY;
- flags |= S3_FLAG_LOAD_RANDKEY;
-
- /* Load random / fixed key */
- if (flags & S3_FLAG_LOAD_RANDKEY)
- cmd = BSP_GEN_RANDOM_KEY;
- else
- cmd = BSP_GEN_FIXED_KEY;
- if (do_bsp_initiate_command(cmd)) {
- pr_info("key loading failed\n");
- return -EIO;
- }
-
- params->magic = BRCMSTB_S3_MAGIC;
- params->reentry = reentry;
-
- /* No more writes to DRAM */
- flush_cache_all();
-
- flags |= BRCMSTB_S3_MAGIC_SHORT;
-
- writel_relaxed(flags, ctrl.aon_sram + AON_REG_MAGIC_FLAGS);
- writel_relaxed(lower_32_bits(params_pa),
- ctrl.aon_sram + AON_REG_CONTROL_LOW);
- writel_relaxed(upper_32_bits(params_pa),
- ctrl.aon_sram + AON_REG_CONTROL_HIGH);
-
- switch (ctrl.s3entry_method) {
- case 0:
- s3entry_method0();
- brcmstb_do_pmsm_power_down(PM_WARM_CONFIG, false);
- break;
- case 1:
- s3entry_method1();
- brcmstb_do_pmsm_power_down(M1_PM_WARM_CONFIG, true);
- break;
- default:
- return -EINVAL;
- }
-
- /* Must have been interrupted from wfi()? */
- return -EINTR;
-}
-
-static int brcmstb_pm_do_s3(unsigned long sp)
-{
- unsigned long save_sp;
- int ret;
-
- asm volatile (
- "mov %[save], sp\n"
- "mov sp, %[new]\n"
- "bl brcmstb_pm_s3_finish\n"
- "mov %[ret], r0\n"
- "mov %[new], sp\n"
- "mov sp, %[save]\n"
- : [save] "=&r" (save_sp), [ret] "=&r" (ret)
- : [new] "r" (sp)
- );
-
- return ret;
-}
-
-static int brcmstb_pm_s3(void)
-{
- void __iomem *sp = ctrl.boot_sram + ctrl.boot_sram_len;
-
- return cpu_suspend((unsigned long)sp, brcmstb_pm_do_s3);
-}
-
-static int brcmstb_pm_standby(bool deep_standby)
-{
- int ret;
-
- if (brcmstb_pm_handshake())
- return -EIO;
-
- if (deep_standby)
- ret = brcmstb_pm_s3();
- else
- ret = brcmstb_pm_s2();
- if (ret)
- pr_err("%s: standby failed\n", __func__);
-
- return ret;
-}
-
-static int brcmstb_pm_enter(suspend_state_t state)
-{
- int ret = -EINVAL;
-
- switch (state) {
- case PM_SUSPEND_STANDBY:
- ret = brcmstb_pm_standby(false);
- break;
- case PM_SUSPEND_MEM:
- ret = brcmstb_pm_standby(true);
- break;
- }
-
- return ret;
-}
-
-static int brcmstb_pm_valid(suspend_state_t state)
-{
- switch (state) {
- case PM_SUSPEND_STANDBY:
- return true;
- case PM_SUSPEND_MEM:
- return ctrl.support_warm_boot;
- default:
- return false;
- }
-}
-
-static const struct platform_suspend_ops brcmstb_pm_ops = {
- .enter = brcmstb_pm_enter,
- .valid = brcmstb_pm_valid,
-};
-
-static const struct of_device_id aon_ctrl_dt_ids[] = {
- { .compatible = "brcm,brcmstb-aon-ctrl" },
- {}
-};
-
-struct ddr_phy_ofdata {
- bool supports_warm_boot;
- size_t pll_status_offset;
- int s3entry_method;
- u32 warm_boot_offset;
- u32 phy_a_standby_ctrl_offs;
- u32 phy_b_standby_ctrl_offs;
-};
-
-static struct ddr_phy_ofdata ddr_phy_71_1 = {
- .supports_warm_boot = true,
- .pll_status_offset = 0x0c,
- .s3entry_method = 1,
- .warm_boot_offset = 0x2c,
- .phy_a_standby_ctrl_offs = 0x198,
- .phy_b_standby_ctrl_offs = DDR_PHY_NO_CHANNEL
-};
-
-static struct ddr_phy_ofdata ddr_phy_72_0 = {
- .supports_warm_boot = true,
- .pll_status_offset = 0x10,
- .s3entry_method = 1,
- .warm_boot_offset = 0x40,
- .phy_a_standby_ctrl_offs = 0x2a4,
- .phy_b_standby_ctrl_offs = 0x8a4
-};
-
-static struct ddr_phy_ofdata ddr_phy_225_1 = {
- .supports_warm_boot = false,
- .pll_status_offset = 0x4,
- .s3entry_method = 0
-};
-
-static struct ddr_phy_ofdata ddr_phy_240_1 = {
- .supports_warm_boot = true,
- .pll_status_offset = 0x4,
- .s3entry_method = 0
-};
-
-static const struct of_device_id ddr_phy_dt_ids[] = {
- {
- .compatible = "brcm,brcmstb-ddr-phy-v71.1",
- .data = &ddr_phy_71_1,
- },
- {
- .compatible = "brcm,brcmstb-ddr-phy-v72.0",
- .data = &ddr_phy_72_0,
- },
- {
- .compatible = "brcm,brcmstb-ddr-phy-v225.1",
- .data = &ddr_phy_225_1,
- },
- {
- .compatible = "brcm,brcmstb-ddr-phy-v240.1",
- .data = &ddr_phy_240_1,
- },
- {
- /* Same as v240.1, for the registers we care about */
- .compatible = "brcm,brcmstb-ddr-phy-v240.2",
- .data = &ddr_phy_240_1,
- },
- {}
-};
-
-struct ddr_seq_ofdata {
- bool needs_ddr_pad;
- u32 warm_boot_offset;
-};
-
-static const struct ddr_seq_ofdata ddr_seq_b22 = {
- .needs_ddr_pad = false,
- .warm_boot_offset = 0x2c,
-};
-
-static const struct ddr_seq_ofdata ddr_seq = {
- .needs_ddr_pad = true,
-};
-
-static const struct of_device_id ddr_shimphy_dt_ids[] = {
- { .compatible = "brcm,brcmstb-ddr-shimphy-v1.0" },
- {}
-};
-
-static const struct of_device_id brcmstb_memc_of_match[] = {
- {
- .compatible = "brcm,brcmstb-memc-ddr-rev-b.2.1",
- .data = &ddr_seq,
- },
- {
- .compatible = "brcm,brcmstb-memc-ddr-rev-b.2.2",
- .data = &ddr_seq_b22,
- },
- {
- .compatible = "brcm,brcmstb-memc-ddr-rev-b.2.3",
- .data = &ddr_seq_b22,
- },
- {
- .compatible = "brcm,brcmstb-memc-ddr-rev-b.3.0",
- .data = &ddr_seq_b22,
- },
- {
- .compatible = "brcm,brcmstb-memc-ddr-rev-b.3.1",
- .data = &ddr_seq_b22,
- },
- {
- .compatible = "brcm,brcmstb-memc-ddr",
- .data = &ddr_seq,
- },
- {},
-};
-
-static void __iomem *brcmstb_ioremap_match(const struct of_device_id *matches,
- int index, const void **ofdata)
-{
- struct device_node *dn;
- const struct of_device_id *match;
-
- dn = of_find_matching_node_and_match(NULL, matches, &match);
- if (!dn)
- return ERR_PTR(-EINVAL);
-
- if (ofdata)
- *ofdata = match->data;
-
- return of_io_request_and_map(dn, index, dn->full_name);
-}
-/*
- * The AON is a small domain in the SoC that can retain its state across
- * various system wide sleep states and specific reset conditions; the
- * AON DATA RAM is a small RAM of a few words (< 1KB) which can store
- * persistent information across such events.
- *
- * The purpose of the below panic notifier is to help with notifying
- * the bootloader that a panic occurred and so that it should try its
- * best to preserve the DRAM contents holding that buffer for recovery
- * by the kernel as opposed to wiping out DRAM clean again.
- *
- * Reference: comment from Florian Fainelli, at
- * https://lore.kernel.org/lkml/781cafb0-8d06-8b56-907a-5175c2da196a@gmail.com
- */
-static int brcmstb_pm_panic_notify(struct notifier_block *nb,
- unsigned long action, void *data)
-{
- writel_relaxed(BRCMSTB_PANIC_MAGIC, ctrl.aon_sram + AON_REG_PANIC);
-
- return NOTIFY_DONE;
-}
-
-static struct notifier_block brcmstb_pm_panic_nb = {
- .notifier_call = brcmstb_pm_panic_notify,
-};
-
-static int brcmstb_pm_probe(struct platform_device *pdev)
-{
- const struct ddr_phy_ofdata *ddr_phy_data;
- const struct ddr_seq_ofdata *ddr_seq_data;
- const struct of_device_id *of_id = NULL;
- struct device_node *dn;
- void __iomem *base;
- int ret, i, s;
-
- /* AON ctrl registers */
- base = brcmstb_ioremap_match(aon_ctrl_dt_ids, 0, NULL);
- if (IS_ERR(base)) {
- pr_err("error mapping AON_CTRL\n");
- ret = PTR_ERR(base);
- goto aon_err;
- }
- ctrl.aon_ctrl_base = base;
-
- /* AON SRAM registers */
- base = brcmstb_ioremap_match(aon_ctrl_dt_ids, 1, NULL);
- if (IS_ERR(base)) {
- /* Assume standard offset */
- ctrl.aon_sram = ctrl.aon_ctrl_base +
- AON_CTRL_SYSTEM_DATA_RAM_OFS;
- s = 0;
- } else {
- ctrl.aon_sram = base;
- s = 1;
- }
-
- writel_relaxed(0, ctrl.aon_sram + AON_REG_PANIC);
-
- /* DDR PHY registers */
- base = brcmstb_ioremap_match(ddr_phy_dt_ids, 0,
- (const void **)&ddr_phy_data);
- if (IS_ERR(base)) {
- pr_err("error mapping DDR PHY\n");
- ret = PTR_ERR(base);
- goto ddr_phy_err;
- }
- ctrl.support_warm_boot = ddr_phy_data->supports_warm_boot;
- ctrl.pll_status_offset = ddr_phy_data->pll_status_offset;
- /* Only need DDR PHY 0 for now? */
- ctrl.memcs[0].ddr_phy_base = base;
- ctrl.s3entry_method = ddr_phy_data->s3entry_method;
- ctrl.phy_a_standby_ctrl_offs = ddr_phy_data->phy_a_standby_ctrl_offs;
- ctrl.phy_b_standby_ctrl_offs = ddr_phy_data->phy_b_standby_ctrl_offs;
- /*
- * Slightly gross to use the phy ver to get a memc,
- * offset but that is the only versioned things so far
- * we can test for.
- */
- ctrl.warm_boot_offset = ddr_phy_data->warm_boot_offset;
-
- /* DDR SHIM-PHY registers */
- for_each_matching_node(dn, ddr_shimphy_dt_ids) {
- i = ctrl.num_memc;
- if (i >= MAX_NUM_MEMC) {
- of_node_put(dn);
- pr_warn("too many MEMCs (max %d)\n", MAX_NUM_MEMC);
- break;
- }
-
- base = of_io_request_and_map(dn, 0, dn->full_name);
- if (IS_ERR(base)) {
- of_node_put(dn);
- if (!ctrl.support_warm_boot)
- break;
-
- pr_err("error mapping DDR SHIMPHY %d\n", i);
- ret = PTR_ERR(base);
- goto ddr_shimphy_err;
- }
- ctrl.memcs[i].ddr_shimphy_base = base;
- ctrl.num_memc++;
- }
-
- /* Sequencer DRAM Param and Control Registers */
- i = 0;
- for_each_matching_node(dn, brcmstb_memc_of_match) {
- base = of_iomap(dn, 0);
- if (!base) {
- of_node_put(dn);
- pr_err("error mapping DDR Sequencer %d\n", i);
- ret = -ENOMEM;
- goto brcmstb_memc_err;
- }
-
- of_id = of_match_node(brcmstb_memc_of_match, dn);
- if (!of_id) {
- iounmap(base);
- of_node_put(dn);
- ret = -EINVAL;
- goto brcmstb_memc_err;
- }
-
- ddr_seq_data = of_id->data;
- ctrl.needs_ddr_pad = ddr_seq_data->needs_ddr_pad;
- /* Adjust warm boot offset based on the DDR sequencer */
- if (ddr_seq_data->warm_boot_offset)
- ctrl.warm_boot_offset = ddr_seq_data->warm_boot_offset;
-
- ctrl.memcs[i].ddr_ctrl = base;
- i++;
- }
-
- pr_debug("PM: supports warm boot:%d, method:%d, wboffs:%x\n",
- ctrl.support_warm_boot, ctrl.s3entry_method,
- ctrl.warm_boot_offset);
-
- dn = of_find_matching_node(NULL, sram_dt_ids);
- if (!dn) {
- pr_err("SRAM not found\n");
- ret = -EINVAL;
- goto brcmstb_memc_err;
- }
-
- ret = brcmstb_init_sram(dn);
- of_node_put(dn);
- if (ret) {
- pr_err("error setting up SRAM for PM\n");
- goto brcmstb_memc_err;
- }
-
- ctrl.pdev = pdev;
-
- ctrl.s3_params = kmalloc(sizeof(*ctrl.s3_params), GFP_KERNEL);
- if (!ctrl.s3_params) {
- ret = -ENOMEM;
- goto s3_params_err;
- }
- ctrl.s3_params_pa = dma_map_single(&pdev->dev, ctrl.s3_params,
- sizeof(*ctrl.s3_params),
- DMA_TO_DEVICE);
- if (dma_mapping_error(&pdev->dev, ctrl.s3_params_pa)) {
- pr_err("error mapping DMA memory\n");
- ret = -ENOMEM;
- goto out;
- }
-
- atomic_notifier_chain_register(&panic_notifier_list,
- &brcmstb_pm_panic_nb);
-
- pm_power_off = brcmstb_pm_poweroff;
- suspend_set_ops(&brcmstb_pm_ops);
-
- return 0;
-
-out:
- kfree(ctrl.s3_params);
-s3_params_err:
- iounmap(ctrl.boot_sram);
-brcmstb_memc_err:
- for (i--; i >= 0; i--)
- iounmap(ctrl.memcs[i].ddr_ctrl);
-ddr_shimphy_err:
- for (i = 0; i < ctrl.num_memc; i++)
- iounmap(ctrl.memcs[i].ddr_shimphy_base);
-
- iounmap(ctrl.memcs[0].ddr_phy_base);
-ddr_phy_err:
- iounmap(ctrl.aon_ctrl_base);
- if (s)
- iounmap(ctrl.aon_sram);
-aon_err:
- pr_warn("PM: initialization failed with code %d\n", ret);
-
- return ret;
-}
-
-static struct platform_driver brcmstb_pm_driver = {
- .driver = {
- .name = "brcmstb-pm",
- .of_match_table = aon_ctrl_dt_ids,
- },
-};
-
-static int __init brcmstb_pm_init(void)
-{
- return platform_driver_probe(&brcmstb_pm_driver,
- brcmstb_pm_probe);
-}
-module_init(brcmstb_pm_init);
diff --git a/drivers/soc/bcm/brcmstb/pm/s2-arm.S b/drivers/soc/bcm/brcmstb/pm/s2-arm.S
deleted file mode 100644
index 0d693795de27..000000000000
--- a/drivers/soc/bcm/brcmstb/pm/s2-arm.S
+++ /dev/null
@@ -1,69 +0,0 @@
-/* SPDX-License-Identifier: GPL-2.0-only */
-/*
- * Copyright © 2014-2017 Broadcom
- */
-
-#include <linux/linkage.h>
-#include <asm/assembler.h>
-
-#include "pm.h"
-
- .arch armv7-a
- .text
- .align 3
-
-#define AON_CTRL_REG r10
-#define DDR_PHY_STATUS_REG r11
-
-/*
- * r0: AON_CTRL base address
- * r1: DDRY PHY PLL status register address
- */
-ENTRY(brcmstb_pm_do_s2)
- stmfd sp!, {r4-r11, lr}
- mov AON_CTRL_REG, r0
- mov DDR_PHY_STATUS_REG, r1
-
- /* Flush memory transactions */
- dsb
-
- /* Cache DDR_PHY_STATUS_REG translation */
- ldr r0, [DDR_PHY_STATUS_REG]
-
- /* power down request */
- ldr r0, =PM_S2_COMMAND
- ldr r1, =0
- str r1, [AON_CTRL_REG, #AON_CTRL_PM_CTRL]
- ldr r1, [AON_CTRL_REG, #AON_CTRL_PM_CTRL]
- str r0, [AON_CTRL_REG, #AON_CTRL_PM_CTRL]
- ldr r0, [AON_CTRL_REG, #AON_CTRL_PM_CTRL]
-
- /* Wait for interrupt */
- wfi
- nop
-
- /* Bring MEMC back up */
-1: ldr r0, [DDR_PHY_STATUS_REG]
- ands r0, #1
- beq 1b
-
- /* Power-up handshake */
- ldr r0, =1
- str r0, [AON_CTRL_REG, #AON_CTRL_HOST_MISC_CMDS]
- ldr r0, [AON_CTRL_REG, #AON_CTRL_HOST_MISC_CMDS]
-
- ldr r0, =0
- str r0, [AON_CTRL_REG, #AON_CTRL_PM_CTRL]
- ldr r0, [AON_CTRL_REG, #AON_CTRL_PM_CTRL]
-
- /* Return to caller */
- ldr r0, =0
- ldmfd sp!, {r4-r11, pc}
-
- ENDPROC(brcmstb_pm_do_s2)
-
- /* Place literal pool here */
- .ltorg
-
-ENTRY(brcmstb_pm_do_s2_sz)
- .word . - brcmstb_pm_do_s2
--
2.34.1
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