| /* |
| * Copyright (C) STMicroelectronics 2009 |
| * Copyright (C) ST-Ericsson SA 2010 |
| * |
| * License Terms: GNU General Public License v2 |
| * Author: Kumar Sanghvi <kumar.sanghvi@stericsson.com> |
| * Author: Sundar Iyer <sundar.iyer@stericsson.com> |
| * Author: Mattias Nilsson <mattias.i.nilsson@stericsson.com> |
| * |
| * U8500 PRCM Unit interface driver |
| * |
| */ |
| #include <linux/module.h> |
| #include <linux/kernel.h> |
| #include <linux/delay.h> |
| #include <linux/errno.h> |
| #include <linux/err.h> |
| #include <linux/spinlock.h> |
| #include <linux/io.h> |
| #include <linux/slab.h> |
| #include <linux/mutex.h> |
| #include <linux/completion.h> |
| #include <linux/irq.h> |
| #include <linux/jiffies.h> |
| #include <linux/bitops.h> |
| #include <linux/fs.h> |
| #include <linux/of.h> |
| #include <linux/of_irq.h> |
| #include <linux/platform_device.h> |
| #include <linux/uaccess.h> |
| #include <linux/mfd/core.h> |
| #include <linux/mfd/dbx500-prcmu.h> |
| #include <linux/mfd/abx500/ab8500.h> |
| #include <linux/regulator/db8500-prcmu.h> |
| #include <linux/regulator/machine.h> |
| #include <linux/cpufreq.h> |
| #include <linux/platform_data/ux500_wdt.h> |
| #include <linux/platform_data/db8500_thermal.h> |
| #include "dbx500-prcmu-regs.h" |
| |
| /* Index of different voltages to be used when accessing AVSData */ |
| #define PRCM_AVS_BASE 0x2FC |
| #define PRCM_AVS_VBB_RET (PRCM_AVS_BASE + 0x0) |
| #define PRCM_AVS_VBB_MAX_OPP (PRCM_AVS_BASE + 0x1) |
| #define PRCM_AVS_VBB_100_OPP (PRCM_AVS_BASE + 0x2) |
| #define PRCM_AVS_VBB_50_OPP (PRCM_AVS_BASE + 0x3) |
| #define PRCM_AVS_VARM_MAX_OPP (PRCM_AVS_BASE + 0x4) |
| #define PRCM_AVS_VARM_100_OPP (PRCM_AVS_BASE + 0x5) |
| #define PRCM_AVS_VARM_50_OPP (PRCM_AVS_BASE + 0x6) |
| #define PRCM_AVS_VARM_RET (PRCM_AVS_BASE + 0x7) |
| #define PRCM_AVS_VAPE_100_OPP (PRCM_AVS_BASE + 0x8) |
| #define PRCM_AVS_VAPE_50_OPP (PRCM_AVS_BASE + 0x9) |
| #define PRCM_AVS_VMOD_100_OPP (PRCM_AVS_BASE + 0xA) |
| #define PRCM_AVS_VMOD_50_OPP (PRCM_AVS_BASE + 0xB) |
| #define PRCM_AVS_VSAFE (PRCM_AVS_BASE + 0xC) |
| |
| #define PRCM_AVS_VOLTAGE 0 |
| #define PRCM_AVS_VOLTAGE_MASK 0x3f |
| #define PRCM_AVS_ISSLOWSTARTUP 6 |
| #define PRCM_AVS_ISSLOWSTARTUP_MASK (1 << PRCM_AVS_ISSLOWSTARTUP) |
| #define PRCM_AVS_ISMODEENABLE 7 |
| #define PRCM_AVS_ISMODEENABLE_MASK (1 << PRCM_AVS_ISMODEENABLE) |
| |
| #define PRCM_BOOT_STATUS 0xFFF |
| #define PRCM_ROMCODE_A2P 0xFFE |
| #define PRCM_ROMCODE_P2A 0xFFD |
| #define PRCM_XP70_CUR_PWR_STATE 0xFFC /* 4 BYTES */ |
| |
| #define PRCM_SW_RST_REASON 0xFF8 /* 2 bytes */ |
| |
| #define _PRCM_MBOX_HEADER 0xFE8 /* 16 bytes */ |
| #define PRCM_MBOX_HEADER_REQ_MB0 (_PRCM_MBOX_HEADER + 0x0) |
| #define PRCM_MBOX_HEADER_REQ_MB1 (_PRCM_MBOX_HEADER + 0x1) |
| #define PRCM_MBOX_HEADER_REQ_MB2 (_PRCM_MBOX_HEADER + 0x2) |
| #define PRCM_MBOX_HEADER_REQ_MB3 (_PRCM_MBOX_HEADER + 0x3) |
| #define PRCM_MBOX_HEADER_REQ_MB4 (_PRCM_MBOX_HEADER + 0x4) |
| #define PRCM_MBOX_HEADER_REQ_MB5 (_PRCM_MBOX_HEADER + 0x5) |
| #define PRCM_MBOX_HEADER_ACK_MB0 (_PRCM_MBOX_HEADER + 0x8) |
| |
| /* Req Mailboxes */ |
| #define PRCM_REQ_MB0 0xFDC /* 12 bytes */ |
| #define PRCM_REQ_MB1 0xFD0 /* 12 bytes */ |
| #define PRCM_REQ_MB2 0xFC0 /* 16 bytes */ |
| #define PRCM_REQ_MB3 0xE4C /* 372 bytes */ |
| #define PRCM_REQ_MB4 0xE48 /* 4 bytes */ |
| #define PRCM_REQ_MB5 0xE44 /* 4 bytes */ |
| |
| /* Ack Mailboxes */ |
| #define PRCM_ACK_MB0 0xE08 /* 52 bytes */ |
| #define PRCM_ACK_MB1 0xE04 /* 4 bytes */ |
| #define PRCM_ACK_MB2 0xE00 /* 4 bytes */ |
| #define PRCM_ACK_MB3 0xDFC /* 4 bytes */ |
| #define PRCM_ACK_MB4 0xDF8 /* 4 bytes */ |
| #define PRCM_ACK_MB5 0xDF4 /* 4 bytes */ |
| |
| /* Mailbox 0 headers */ |
| #define MB0H_POWER_STATE_TRANS 0 |
| #define MB0H_CONFIG_WAKEUPS_EXE 1 |
| #define MB0H_READ_WAKEUP_ACK 3 |
| #define MB0H_CONFIG_WAKEUPS_SLEEP 4 |
| |
| #define MB0H_WAKEUP_EXE 2 |
| #define MB0H_WAKEUP_SLEEP 5 |
| |
| /* Mailbox 0 REQs */ |
| #define PRCM_REQ_MB0_AP_POWER_STATE (PRCM_REQ_MB0 + 0x0) |
| #define PRCM_REQ_MB0_AP_PLL_STATE (PRCM_REQ_MB0 + 0x1) |
| #define PRCM_REQ_MB0_ULP_CLOCK_STATE (PRCM_REQ_MB0 + 0x2) |
| #define PRCM_REQ_MB0_DO_NOT_WFI (PRCM_REQ_MB0 + 0x3) |
| #define PRCM_REQ_MB0_WAKEUP_8500 (PRCM_REQ_MB0 + 0x4) |
| #define PRCM_REQ_MB0_WAKEUP_4500 (PRCM_REQ_MB0 + 0x8) |
| |
| /* Mailbox 0 ACKs */ |
| #define PRCM_ACK_MB0_AP_PWRSTTR_STATUS (PRCM_ACK_MB0 + 0x0) |
| #define PRCM_ACK_MB0_READ_POINTER (PRCM_ACK_MB0 + 0x1) |
| #define PRCM_ACK_MB0_WAKEUP_0_8500 (PRCM_ACK_MB0 + 0x4) |
| #define PRCM_ACK_MB0_WAKEUP_0_4500 (PRCM_ACK_MB0 + 0x8) |
| #define PRCM_ACK_MB0_WAKEUP_1_8500 (PRCM_ACK_MB0 + 0x1C) |
| #define PRCM_ACK_MB0_WAKEUP_1_4500 (PRCM_ACK_MB0 + 0x20) |
| #define PRCM_ACK_MB0_EVENT_4500_NUMBERS 20 |
| |
| /* Mailbox 1 headers */ |
| #define MB1H_ARM_APE_OPP 0x0 |
| #define MB1H_RESET_MODEM 0x2 |
| #define MB1H_REQUEST_APE_OPP_100_VOLT 0x3 |
| #define MB1H_RELEASE_APE_OPP_100_VOLT 0x4 |
| #define MB1H_RELEASE_USB_WAKEUP 0x5 |
| #define MB1H_PLL_ON_OFF 0x6 |
| |
| /* Mailbox 1 Requests */ |
| #define PRCM_REQ_MB1_ARM_OPP (PRCM_REQ_MB1 + 0x0) |
| #define PRCM_REQ_MB1_APE_OPP (PRCM_REQ_MB1 + 0x1) |
| #define PRCM_REQ_MB1_PLL_ON_OFF (PRCM_REQ_MB1 + 0x4) |
| #define PLL_SOC0_OFF 0x1 |
| #define PLL_SOC0_ON 0x2 |
| #define PLL_SOC1_OFF 0x4 |
| #define PLL_SOC1_ON 0x8 |
| |
| /* Mailbox 1 ACKs */ |
| #define PRCM_ACK_MB1_CURRENT_ARM_OPP (PRCM_ACK_MB1 + 0x0) |
| #define PRCM_ACK_MB1_CURRENT_APE_OPP (PRCM_ACK_MB1 + 0x1) |
| #define PRCM_ACK_MB1_APE_VOLTAGE_STATUS (PRCM_ACK_MB1 + 0x2) |
| #define PRCM_ACK_MB1_DVFS_STATUS (PRCM_ACK_MB1 + 0x3) |
| |
| /* Mailbox 2 headers */ |
| #define MB2H_DPS 0x0 |
| #define MB2H_AUTO_PWR 0x1 |
| |
| /* Mailbox 2 REQs */ |
| #define PRCM_REQ_MB2_SVA_MMDSP (PRCM_REQ_MB2 + 0x0) |
| #define PRCM_REQ_MB2_SVA_PIPE (PRCM_REQ_MB2 + 0x1) |
| #define PRCM_REQ_MB2_SIA_MMDSP (PRCM_REQ_MB2 + 0x2) |
| #define PRCM_REQ_MB2_SIA_PIPE (PRCM_REQ_MB2 + 0x3) |
| #define PRCM_REQ_MB2_SGA (PRCM_REQ_MB2 + 0x4) |
| #define PRCM_REQ_MB2_B2R2_MCDE (PRCM_REQ_MB2 + 0x5) |
| #define PRCM_REQ_MB2_ESRAM12 (PRCM_REQ_MB2 + 0x6) |
| #define PRCM_REQ_MB2_ESRAM34 (PRCM_REQ_MB2 + 0x7) |
| #define PRCM_REQ_MB2_AUTO_PM_SLEEP (PRCM_REQ_MB2 + 0x8) |
| #define PRCM_REQ_MB2_AUTO_PM_IDLE (PRCM_REQ_MB2 + 0xC) |
| |
| /* Mailbox 2 ACKs */ |
| #define PRCM_ACK_MB2_DPS_STATUS (PRCM_ACK_MB2 + 0x0) |
| #define HWACC_PWR_ST_OK 0xFE |
| |
| /* Mailbox 3 headers */ |
| #define MB3H_ANC 0x0 |
| #define MB3H_SIDETONE 0x1 |
| #define MB3H_SYSCLK 0xE |
| |
| /* Mailbox 3 Requests */ |
| #define PRCM_REQ_MB3_ANC_FIR_COEFF (PRCM_REQ_MB3 + 0x0) |
| #define PRCM_REQ_MB3_ANC_IIR_COEFF (PRCM_REQ_MB3 + 0x20) |
| #define PRCM_REQ_MB3_ANC_SHIFTER (PRCM_REQ_MB3 + 0x60) |
| #define PRCM_REQ_MB3_ANC_WARP (PRCM_REQ_MB3 + 0x64) |
| #define PRCM_REQ_MB3_SIDETONE_FIR_GAIN (PRCM_REQ_MB3 + 0x68) |
| #define PRCM_REQ_MB3_SIDETONE_FIR_COEFF (PRCM_REQ_MB3 + 0x6C) |
| #define PRCM_REQ_MB3_SYSCLK_MGT (PRCM_REQ_MB3 + 0x16C) |
| |
| /* Mailbox 4 headers */ |
| #define MB4H_DDR_INIT 0x0 |
| #define MB4H_MEM_ST 0x1 |
| #define MB4H_HOTDOG 0x12 |
| #define MB4H_HOTMON 0x13 |
| #define MB4H_HOT_PERIOD 0x14 |
| #define MB4H_A9WDOG_CONF 0x16 |
| #define MB4H_A9WDOG_EN 0x17 |
| #define MB4H_A9WDOG_DIS 0x18 |
| #define MB4H_A9WDOG_LOAD 0x19 |
| #define MB4H_A9WDOG_KICK 0x20 |
| |
| /* Mailbox 4 Requests */ |
| #define PRCM_REQ_MB4_DDR_ST_AP_SLEEP_IDLE (PRCM_REQ_MB4 + 0x0) |
| #define PRCM_REQ_MB4_DDR_ST_AP_DEEP_IDLE (PRCM_REQ_MB4 + 0x1) |
| #define PRCM_REQ_MB4_ESRAM0_ST (PRCM_REQ_MB4 + 0x3) |
| #define PRCM_REQ_MB4_HOTDOG_THRESHOLD (PRCM_REQ_MB4 + 0x0) |
| #define PRCM_REQ_MB4_HOTMON_LOW (PRCM_REQ_MB4 + 0x0) |
| #define PRCM_REQ_MB4_HOTMON_HIGH (PRCM_REQ_MB4 + 0x1) |
| #define PRCM_REQ_MB4_HOTMON_CONFIG (PRCM_REQ_MB4 + 0x2) |
| #define PRCM_REQ_MB4_HOT_PERIOD (PRCM_REQ_MB4 + 0x0) |
| #define HOTMON_CONFIG_LOW BIT(0) |
| #define HOTMON_CONFIG_HIGH BIT(1) |
| #define PRCM_REQ_MB4_A9WDOG_0 (PRCM_REQ_MB4 + 0x0) |
| #define PRCM_REQ_MB4_A9WDOG_1 (PRCM_REQ_MB4 + 0x1) |
| #define PRCM_REQ_MB4_A9WDOG_2 (PRCM_REQ_MB4 + 0x2) |
| #define PRCM_REQ_MB4_A9WDOG_3 (PRCM_REQ_MB4 + 0x3) |
| #define A9WDOG_AUTO_OFF_EN BIT(7) |
| #define A9WDOG_AUTO_OFF_DIS 0 |
| #define A9WDOG_ID_MASK 0xf |
| |
| /* Mailbox 5 Requests */ |
| #define PRCM_REQ_MB5_I2C_SLAVE_OP (PRCM_REQ_MB5 + 0x0) |
| #define PRCM_REQ_MB5_I2C_HW_BITS (PRCM_REQ_MB5 + 0x1) |
| #define PRCM_REQ_MB5_I2C_REG (PRCM_REQ_MB5 + 0x2) |
| #define PRCM_REQ_MB5_I2C_VAL (PRCM_REQ_MB5 + 0x3) |
| #define PRCMU_I2C_WRITE(slave) (((slave) << 1) | BIT(6)) |
| #define PRCMU_I2C_READ(slave) (((slave) << 1) | BIT(0) | BIT(6)) |
| #define PRCMU_I2C_STOP_EN BIT(3) |
| |
| /* Mailbox 5 ACKs */ |
| #define PRCM_ACK_MB5_I2C_STATUS (PRCM_ACK_MB5 + 0x1) |
| #define PRCM_ACK_MB5_I2C_VAL (PRCM_ACK_MB5 + 0x3) |
| #define I2C_WR_OK 0x1 |
| #define I2C_RD_OK 0x2 |
| |
| #define NUM_MB 8 |
| #define MBOX_BIT BIT |
| #define ALL_MBOX_BITS (MBOX_BIT(NUM_MB) - 1) |
| |
| /* |
| * Wakeups/IRQs |
| */ |
| |
| #define WAKEUP_BIT_RTC BIT(0) |
| #define WAKEUP_BIT_RTT0 BIT(1) |
| #define WAKEUP_BIT_RTT1 BIT(2) |
| #define WAKEUP_BIT_HSI0 BIT(3) |
| #define WAKEUP_BIT_HSI1 BIT(4) |
| #define WAKEUP_BIT_CA_WAKE BIT(5) |
| #define WAKEUP_BIT_USB BIT(6) |
| #define WAKEUP_BIT_ABB BIT(7) |
| #define WAKEUP_BIT_ABB_FIFO BIT(8) |
| #define WAKEUP_BIT_SYSCLK_OK BIT(9) |
| #define WAKEUP_BIT_CA_SLEEP BIT(10) |
| #define WAKEUP_BIT_AC_WAKE_ACK BIT(11) |
| #define WAKEUP_BIT_SIDE_TONE_OK BIT(12) |
| #define WAKEUP_BIT_ANC_OK BIT(13) |
| #define WAKEUP_BIT_SW_ERROR BIT(14) |
| #define WAKEUP_BIT_AC_SLEEP_ACK BIT(15) |
| #define WAKEUP_BIT_ARM BIT(17) |
| #define WAKEUP_BIT_HOTMON_LOW BIT(18) |
| #define WAKEUP_BIT_HOTMON_HIGH BIT(19) |
| #define WAKEUP_BIT_MODEM_SW_RESET_REQ BIT(20) |
| #define WAKEUP_BIT_GPIO0 BIT(23) |
| #define WAKEUP_BIT_GPIO1 BIT(24) |
| #define WAKEUP_BIT_GPIO2 BIT(25) |
| #define WAKEUP_BIT_GPIO3 BIT(26) |
| #define WAKEUP_BIT_GPIO4 BIT(27) |
| #define WAKEUP_BIT_GPIO5 BIT(28) |
| #define WAKEUP_BIT_GPIO6 BIT(29) |
| #define WAKEUP_BIT_GPIO7 BIT(30) |
| #define WAKEUP_BIT_GPIO8 BIT(31) |
| |
| static struct { |
| bool valid; |
| struct prcmu_fw_version version; |
| } fw_info; |
| |
| static struct irq_domain *db8500_irq_domain; |
| |
| /* |
| * This vector maps irq numbers to the bits in the bit field used in |
| * communication with the PRCMU firmware. |
| * |
| * The reason for having this is to keep the irq numbers contiguous even though |
| * the bits in the bit field are not. (The bits also have a tendency to move |
| * around, to further complicate matters.) |
| */ |
| #define IRQ_INDEX(_name) ((IRQ_PRCMU_##_name)) |
| #define IRQ_ENTRY(_name)[IRQ_INDEX(_name)] = (WAKEUP_BIT_##_name) |
| |
| #define IRQ_PRCMU_RTC 0 |
| #define IRQ_PRCMU_RTT0 1 |
| #define IRQ_PRCMU_RTT1 2 |
| #define IRQ_PRCMU_HSI0 3 |
| #define IRQ_PRCMU_HSI1 4 |
| #define IRQ_PRCMU_CA_WAKE 5 |
| #define IRQ_PRCMU_USB 6 |
| #define IRQ_PRCMU_ABB 7 |
| #define IRQ_PRCMU_ABB_FIFO 8 |
| #define IRQ_PRCMU_ARM 9 |
| #define IRQ_PRCMU_MODEM_SW_RESET_REQ 10 |
| #define IRQ_PRCMU_GPIO0 11 |
| #define IRQ_PRCMU_GPIO1 12 |
| #define IRQ_PRCMU_GPIO2 13 |
| #define IRQ_PRCMU_GPIO3 14 |
| #define IRQ_PRCMU_GPIO4 15 |
| #define IRQ_PRCMU_GPIO5 16 |
| #define IRQ_PRCMU_GPIO6 17 |
| #define IRQ_PRCMU_GPIO7 18 |
| #define IRQ_PRCMU_GPIO8 19 |
| #define IRQ_PRCMU_CA_SLEEP 20 |
| #define IRQ_PRCMU_HOTMON_LOW 21 |
| #define IRQ_PRCMU_HOTMON_HIGH 22 |
| #define NUM_PRCMU_WAKEUPS 23 |
| |
| static u32 prcmu_irq_bit[NUM_PRCMU_WAKEUPS] = { |
| IRQ_ENTRY(RTC), |
| IRQ_ENTRY(RTT0), |
| IRQ_ENTRY(RTT1), |
| IRQ_ENTRY(HSI0), |
| IRQ_ENTRY(HSI1), |
| IRQ_ENTRY(CA_WAKE), |
| IRQ_ENTRY(USB), |
| IRQ_ENTRY(ABB), |
| IRQ_ENTRY(ABB_FIFO), |
| IRQ_ENTRY(CA_SLEEP), |
| IRQ_ENTRY(ARM), |
| IRQ_ENTRY(HOTMON_LOW), |
| IRQ_ENTRY(HOTMON_HIGH), |
| IRQ_ENTRY(MODEM_SW_RESET_REQ), |
| IRQ_ENTRY(GPIO0), |
| IRQ_ENTRY(GPIO1), |
| IRQ_ENTRY(GPIO2), |
| IRQ_ENTRY(GPIO3), |
| IRQ_ENTRY(GPIO4), |
| IRQ_ENTRY(GPIO5), |
| IRQ_ENTRY(GPIO6), |
| IRQ_ENTRY(GPIO7), |
| IRQ_ENTRY(GPIO8) |
| }; |
| |
| #define VALID_WAKEUPS (BIT(NUM_PRCMU_WAKEUP_INDICES) - 1) |
| #define WAKEUP_ENTRY(_name)[PRCMU_WAKEUP_INDEX_##_name] = (WAKEUP_BIT_##_name) |
| static u32 prcmu_wakeup_bit[NUM_PRCMU_WAKEUP_INDICES] = { |
| WAKEUP_ENTRY(RTC), |
| WAKEUP_ENTRY(RTT0), |
| WAKEUP_ENTRY(RTT1), |
| WAKEUP_ENTRY(HSI0), |
| WAKEUP_ENTRY(HSI1), |
| WAKEUP_ENTRY(USB), |
| WAKEUP_ENTRY(ABB), |
| WAKEUP_ENTRY(ABB_FIFO), |
| WAKEUP_ENTRY(ARM) |
| }; |
| |
| /* |
| * mb0_transfer - state needed for mailbox 0 communication. |
| * @lock: The transaction lock. |
| * @dbb_events_lock: A lock used to handle concurrent access to (parts of) |
| * the request data. |
| * @mask_work: Work structure used for (un)masking wakeup interrupts. |
| * @req: Request data that need to persist between requests. |
| */ |
| static struct { |
| spinlock_t lock; |
| spinlock_t dbb_irqs_lock; |
| struct work_struct mask_work; |
| struct mutex ac_wake_lock; |
| struct completion ac_wake_work; |
| struct { |
| u32 dbb_irqs; |
| u32 dbb_wakeups; |
| u32 abb_events; |
| } req; |
| } mb0_transfer; |
| |
| /* |
| * mb1_transfer - state needed for mailbox 1 communication. |
| * @lock: The transaction lock. |
| * @work: The transaction completion structure. |
| * @ape_opp: The current APE OPP. |
| * @ack: Reply ("acknowledge") data. |
| */ |
| static struct { |
| struct mutex lock; |
| struct completion work; |
| u8 ape_opp; |
| struct { |
| u8 header; |
| u8 arm_opp; |
| u8 ape_opp; |
| u8 ape_voltage_status; |
| } ack; |
| } mb1_transfer; |
| |
| /* |
| * mb2_transfer - state needed for mailbox 2 communication. |
| * @lock: The transaction lock. |
| * @work: The transaction completion structure. |
| * @auto_pm_lock: The autonomous power management configuration lock. |
| * @auto_pm_enabled: A flag indicating whether autonomous PM is enabled. |
| * @req: Request data that need to persist between requests. |
| * @ack: Reply ("acknowledge") data. |
| */ |
| static struct { |
| struct mutex lock; |
| struct completion work; |
| spinlock_t auto_pm_lock; |
| bool auto_pm_enabled; |
| struct { |
| u8 status; |
| } ack; |
| } mb2_transfer; |
| |
| /* |
| * mb3_transfer - state needed for mailbox 3 communication. |
| * @lock: The request lock. |
| * @sysclk_lock: A lock used to handle concurrent sysclk requests. |
| * @sysclk_work: Work structure used for sysclk requests. |
| */ |
| static struct { |
| spinlock_t lock; |
| struct mutex sysclk_lock; |
| struct completion sysclk_work; |
| } mb3_transfer; |
| |
| /* |
| * mb4_transfer - state needed for mailbox 4 communication. |
| * @lock: The transaction lock. |
| * @work: The transaction completion structure. |
| */ |
| static struct { |
| struct mutex lock; |
| struct completion work; |
| } mb4_transfer; |
| |
| /* |
| * mb5_transfer - state needed for mailbox 5 communication. |
| * @lock: The transaction lock. |
| * @work: The transaction completion structure. |
| * @ack: Reply ("acknowledge") data. |
| */ |
| static struct { |
| struct mutex lock; |
| struct completion work; |
| struct { |
| u8 status; |
| u8 value; |
| } ack; |
| } mb5_transfer; |
| |
| static atomic_t ac_wake_req_state = ATOMIC_INIT(0); |
| |
| /* Spinlocks */ |
| static DEFINE_SPINLOCK(prcmu_lock); |
| static DEFINE_SPINLOCK(clkout_lock); |
| |
| /* Global var to runtime determine TCDM base for v2 or v1 */ |
| static __iomem void *tcdm_base; |
| static __iomem void *prcmu_base; |
| |
| struct clk_mgt { |
| u32 offset; |
| u32 pllsw; |
| int branch; |
| bool clk38div; |
| }; |
| |
| enum { |
| PLL_RAW, |
| PLL_FIX, |
| PLL_DIV |
| }; |
| |
| static DEFINE_SPINLOCK(clk_mgt_lock); |
| |
| #define CLK_MGT_ENTRY(_name, _branch, _clk38div)[PRCMU_##_name] = \ |
| { (PRCM_##_name##_MGT), 0 , _branch, _clk38div} |
| static struct clk_mgt clk_mgt[PRCMU_NUM_REG_CLOCKS] = { |
| CLK_MGT_ENTRY(SGACLK, PLL_DIV, false), |
| CLK_MGT_ENTRY(UARTCLK, PLL_FIX, true), |
| CLK_MGT_ENTRY(MSP02CLK, PLL_FIX, true), |
| CLK_MGT_ENTRY(MSP1CLK, PLL_FIX, true), |
| CLK_MGT_ENTRY(I2CCLK, PLL_FIX, true), |
| CLK_MGT_ENTRY(SDMMCCLK, PLL_DIV, true), |
| CLK_MGT_ENTRY(SLIMCLK, PLL_FIX, true), |
| CLK_MGT_ENTRY(PER1CLK, PLL_DIV, true), |
| CLK_MGT_ENTRY(PER2CLK, PLL_DIV, true), |
| CLK_MGT_ENTRY(PER3CLK, PLL_DIV, true), |
| CLK_MGT_ENTRY(PER5CLK, PLL_DIV, true), |
| CLK_MGT_ENTRY(PER6CLK, PLL_DIV, true), |
| CLK_MGT_ENTRY(PER7CLK, PLL_DIV, true), |
| CLK_MGT_ENTRY(LCDCLK, PLL_FIX, true), |
| CLK_MGT_ENTRY(BMLCLK, PLL_DIV, true), |
| CLK_MGT_ENTRY(HSITXCLK, PLL_DIV, true), |
| CLK_MGT_ENTRY(HSIRXCLK, PLL_DIV, true), |
| CLK_MGT_ENTRY(HDMICLK, PLL_FIX, false), |
| CLK_MGT_ENTRY(APEATCLK, PLL_DIV, true), |
| CLK_MGT_ENTRY(APETRACECLK, PLL_DIV, true), |
| CLK_MGT_ENTRY(MCDECLK, PLL_DIV, true), |
| CLK_MGT_ENTRY(IPI2CCLK, PLL_FIX, true), |
| CLK_MGT_ENTRY(DSIALTCLK, PLL_FIX, false), |
| CLK_MGT_ENTRY(DMACLK, PLL_DIV, true), |
| CLK_MGT_ENTRY(B2R2CLK, PLL_DIV, true), |
| CLK_MGT_ENTRY(TVCLK, PLL_FIX, true), |
| CLK_MGT_ENTRY(SSPCLK, PLL_FIX, true), |
| CLK_MGT_ENTRY(RNGCLK, PLL_FIX, true), |
| CLK_MGT_ENTRY(UICCCLK, PLL_FIX, false), |
| }; |
| |
| struct dsiclk { |
| u32 divsel_mask; |
| u32 divsel_shift; |
| u32 divsel; |
| }; |
| |
| static struct dsiclk dsiclk[2] = { |
| { |
| .divsel_mask = PRCM_DSI_PLLOUT_SEL_DSI0_PLLOUT_DIVSEL_MASK, |
| .divsel_shift = PRCM_DSI_PLLOUT_SEL_DSI0_PLLOUT_DIVSEL_SHIFT, |
| .divsel = PRCM_DSI_PLLOUT_SEL_PHI, |
| }, |
| { |
| .divsel_mask = PRCM_DSI_PLLOUT_SEL_DSI1_PLLOUT_DIVSEL_MASK, |
| .divsel_shift = PRCM_DSI_PLLOUT_SEL_DSI1_PLLOUT_DIVSEL_SHIFT, |
| .divsel = PRCM_DSI_PLLOUT_SEL_PHI, |
| } |
| }; |
| |
| struct dsiescclk { |
| u32 en; |
| u32 div_mask; |
| u32 div_shift; |
| }; |
| |
| static struct dsiescclk dsiescclk[3] = { |
| { |
| .en = PRCM_DSITVCLK_DIV_DSI0_ESC_CLK_EN, |
| .div_mask = PRCM_DSITVCLK_DIV_DSI0_ESC_CLK_DIV_MASK, |
| .div_shift = PRCM_DSITVCLK_DIV_DSI0_ESC_CLK_DIV_SHIFT, |
| }, |
| { |
| .en = PRCM_DSITVCLK_DIV_DSI1_ESC_CLK_EN, |
| .div_mask = PRCM_DSITVCLK_DIV_DSI1_ESC_CLK_DIV_MASK, |
| .div_shift = PRCM_DSITVCLK_DIV_DSI1_ESC_CLK_DIV_SHIFT, |
| }, |
| { |
| .en = PRCM_DSITVCLK_DIV_DSI2_ESC_CLK_EN, |
| .div_mask = PRCM_DSITVCLK_DIV_DSI2_ESC_CLK_DIV_MASK, |
| .div_shift = PRCM_DSITVCLK_DIV_DSI2_ESC_CLK_DIV_SHIFT, |
| } |
| }; |
| |
| |
| /* |
| * Used by MCDE to setup all necessary PRCMU registers |
| */ |
| #define PRCMU_RESET_DSIPLL 0x00004000 |
| #define PRCMU_UNCLAMP_DSIPLL 0x00400800 |
| |
| #define PRCMU_CLK_PLL_DIV_SHIFT 0 |
| #define PRCMU_CLK_PLL_SW_SHIFT 5 |
| #define PRCMU_CLK_38 (1 << 9) |
| #define PRCMU_CLK_38_SRC (1 << 10) |
| #define PRCMU_CLK_38_DIV (1 << 11) |
| |
| /* PLLDIV=12, PLLSW=4 (PLLDDR) */ |
| #define PRCMU_DSI_CLOCK_SETTING 0x0000008C |
| |
| /* DPI 50000000 Hz */ |
| #define PRCMU_DPI_CLOCK_SETTING ((1 << PRCMU_CLK_PLL_SW_SHIFT) | \ |
| (16 << PRCMU_CLK_PLL_DIV_SHIFT)) |
| #define PRCMU_DSI_LP_CLOCK_SETTING 0x00000E00 |
| |
| /* D=101, N=1, R=4, SELDIV2=0 */ |
| #define PRCMU_PLLDSI_FREQ_SETTING 0x00040165 |
| |
| #define PRCMU_ENABLE_PLLDSI 0x00000001 |
| #define PRCMU_DISABLE_PLLDSI 0x00000000 |
| #define PRCMU_RELEASE_RESET_DSS 0x0000400C |
| #define PRCMU_DSI_PLLOUT_SEL_SETTING 0x00000202 |
| /* ESC clk, div0=1, div1=1, div2=3 */ |
| #define PRCMU_ENABLE_ESCAPE_CLOCK_DIV 0x07030101 |
| #define PRCMU_DISABLE_ESCAPE_CLOCK_DIV 0x00030101 |
| #define PRCMU_DSI_RESET_SW 0x00000007 |
| |
| #define PRCMU_PLLDSI_LOCKP_LOCKED 0x3 |
| |
| int db8500_prcmu_enable_dsipll(void) |
| { |
| int i; |
| |
| /* Clear DSIPLL_RESETN */ |
| writel(PRCMU_RESET_DSIPLL, PRCM_APE_RESETN_CLR); |
| /* Unclamp DSIPLL in/out */ |
| writel(PRCMU_UNCLAMP_DSIPLL, PRCM_MMIP_LS_CLAMP_CLR); |
| |
| /* Set DSI PLL FREQ */ |
| writel(PRCMU_PLLDSI_FREQ_SETTING, PRCM_PLLDSI_FREQ); |
| writel(PRCMU_DSI_PLLOUT_SEL_SETTING, PRCM_DSI_PLLOUT_SEL); |
| /* Enable Escape clocks */ |
| writel(PRCMU_ENABLE_ESCAPE_CLOCK_DIV, PRCM_DSITVCLK_DIV); |
| |
| /* Start DSI PLL */ |
| writel(PRCMU_ENABLE_PLLDSI, PRCM_PLLDSI_ENABLE); |
| /* Reset DSI PLL */ |
| writel(PRCMU_DSI_RESET_SW, PRCM_DSI_SW_RESET); |
| for (i = 0; i < 10; i++) { |
| if ((readl(PRCM_PLLDSI_LOCKP) & PRCMU_PLLDSI_LOCKP_LOCKED) |
| == PRCMU_PLLDSI_LOCKP_LOCKED) |
| break; |
| udelay(100); |
| } |
| /* Set DSIPLL_RESETN */ |
| writel(PRCMU_RESET_DSIPLL, PRCM_APE_RESETN_SET); |
| return 0; |
| } |
| |
| int db8500_prcmu_disable_dsipll(void) |
| { |
| /* Disable dsi pll */ |
| writel(PRCMU_DISABLE_PLLDSI, PRCM_PLLDSI_ENABLE); |
| /* Disable escapeclock */ |
| writel(PRCMU_DISABLE_ESCAPE_CLOCK_DIV, PRCM_DSITVCLK_DIV); |
| return 0; |
| } |
| |
| int db8500_prcmu_set_display_clocks(void) |
| { |
| unsigned long flags; |
| |
| spin_lock_irqsave(&clk_mgt_lock, flags); |
| |
| /* Grab the HW semaphore. */ |
| while ((readl(PRCM_SEM) & PRCM_SEM_PRCM_SEM) != 0) |
| cpu_relax(); |
| |
| writel(PRCMU_DSI_CLOCK_SETTING, prcmu_base + PRCM_HDMICLK_MGT); |
| writel(PRCMU_DSI_LP_CLOCK_SETTING, prcmu_base + PRCM_TVCLK_MGT); |
| writel(PRCMU_DPI_CLOCK_SETTING, prcmu_base + PRCM_LCDCLK_MGT); |
| |
| /* Release the HW semaphore. */ |
| writel(0, PRCM_SEM); |
| |
| spin_unlock_irqrestore(&clk_mgt_lock, flags); |
| |
| return 0; |
| } |
| |
| u32 db8500_prcmu_read(unsigned int reg) |
| { |
| return readl(prcmu_base + reg); |
| } |
| |
| void db8500_prcmu_write(unsigned int reg, u32 value) |
| { |
| unsigned long flags; |
| |
| spin_lock_irqsave(&prcmu_lock, flags); |
| writel(value, (prcmu_base + reg)); |
| spin_unlock_irqrestore(&prcmu_lock, flags); |
| } |
| |
| void db8500_prcmu_write_masked(unsigned int reg, u32 mask, u32 value) |
| { |
| u32 val; |
| unsigned long flags; |
| |
| spin_lock_irqsave(&prcmu_lock, flags); |
| val = readl(prcmu_base + reg); |
| val = ((val & ~mask) | (value & mask)); |
| writel(val, (prcmu_base + reg)); |
| spin_unlock_irqrestore(&prcmu_lock, flags); |
| } |
| |
| struct prcmu_fw_version *prcmu_get_fw_version(void) |
| { |
| return fw_info.valid ? &fw_info.version : NULL; |
| } |
| |
| bool prcmu_has_arm_maxopp(void) |
| { |
| return (readb(tcdm_base + PRCM_AVS_VARM_MAX_OPP) & |
| PRCM_AVS_ISMODEENABLE_MASK) == PRCM_AVS_ISMODEENABLE_MASK; |
| } |
| |
| /** |
| * prcmu_get_boot_status - PRCMU boot status checking |
| * Returns: the current PRCMU boot status |
| */ |
| int prcmu_get_boot_status(void) |
| { |
| return readb(tcdm_base + PRCM_BOOT_STATUS); |
| } |
| |
| /** |
| * prcmu_set_rc_a2p - This function is used to run few power state sequences |
| * @val: Value to be set, i.e. transition requested |
| * Returns: 0 on success, -EINVAL on invalid argument |
| * |
| * This function is used to run the following power state sequences - |
| * any state to ApReset, ApDeepSleep to ApExecute, ApExecute to ApDeepSleep |
| */ |
| int prcmu_set_rc_a2p(enum romcode_write val) |
| { |
| if (val < RDY_2_DS || val > RDY_2_XP70_RST) |
| return -EINVAL; |
| writeb(val, (tcdm_base + PRCM_ROMCODE_A2P)); |
| return 0; |
| } |
| |
| /** |
| * prcmu_get_rc_p2a - This function is used to get power state sequences |
| * Returns: the power transition that has last happened |
| * |
| * This function can return the following transitions- |
| * any state to ApReset, ApDeepSleep to ApExecute, ApExecute to ApDeepSleep |
| */ |
| enum romcode_read prcmu_get_rc_p2a(void) |
| { |
| return readb(tcdm_base + PRCM_ROMCODE_P2A); |
| } |
| |
| /** |
| * prcmu_get_current_mode - Return the current XP70 power mode |
| * Returns: Returns the current AP(ARM) power mode: init, |
| * apBoot, apExecute, apDeepSleep, apSleep, apIdle, apReset |
| */ |
| enum ap_pwrst prcmu_get_xp70_current_state(void) |
| { |
| return readb(tcdm_base + PRCM_XP70_CUR_PWR_STATE); |
| } |
| |
| /** |
| * prcmu_config_clkout - Configure one of the programmable clock outputs. |
| * @clkout: The CLKOUT number (0 or 1). |
| * @source: The clock to be used (one of the PRCMU_CLKSRC_*). |
| * @div: The divider to be applied. |
| * |
| * Configures one of the programmable clock outputs (CLKOUTs). |
| * @div should be in the range [1,63] to request a configuration, or 0 to |
| * inform that the configuration is no longer requested. |
| */ |
| int prcmu_config_clkout(u8 clkout, u8 source, u8 div) |
| { |
| static int requests[2]; |
| int r = 0; |
| unsigned long flags; |
| u32 val; |
| u32 bits; |
| u32 mask; |
| u32 div_mask; |
| |
| BUG_ON(clkout > 1); |
| BUG_ON(div > 63); |
| BUG_ON((clkout == 0) && (source > PRCMU_CLKSRC_CLK009)); |
| |
| if (!div && !requests[clkout]) |
| return -EINVAL; |
| |
| switch (clkout) { |
| case 0: |
| div_mask = PRCM_CLKOCR_CLKODIV0_MASK; |
| mask = (PRCM_CLKOCR_CLKODIV0_MASK | PRCM_CLKOCR_CLKOSEL0_MASK); |
| bits = ((source << PRCM_CLKOCR_CLKOSEL0_SHIFT) | |
| (div << PRCM_CLKOCR_CLKODIV0_SHIFT)); |
| break; |
| case 1: |
| div_mask = PRCM_CLKOCR_CLKODIV1_MASK; |
| mask = (PRCM_CLKOCR_CLKODIV1_MASK | PRCM_CLKOCR_CLKOSEL1_MASK | |
| PRCM_CLKOCR_CLK1TYPE); |
| bits = ((source << PRCM_CLKOCR_CLKOSEL1_SHIFT) | |
| (div << PRCM_CLKOCR_CLKODIV1_SHIFT)); |
| break; |
| } |
| bits &= mask; |
| |
| spin_lock_irqsave(&clkout_lock, flags); |
| |
| val = readl(PRCM_CLKOCR); |
| if (val & div_mask) { |
| if (div) { |
| if ((val & mask) != bits) { |
| r = -EBUSY; |
| goto unlock_and_return; |
| } |
| } else { |
| if ((val & mask & ~div_mask) != bits) { |
| r = -EINVAL; |
| goto unlock_and_return; |
| } |
| } |
| } |
| writel((bits | (val & ~mask)), PRCM_CLKOCR); |
| requests[clkout] += (div ? 1 : -1); |
| |
| unlock_and_return: |
| spin_unlock_irqrestore(&clkout_lock, flags); |
| |
| return r; |
| } |
| |
| int db8500_prcmu_set_power_state(u8 state, bool keep_ulp_clk, bool keep_ap_pll) |
| { |
| unsigned long flags; |
| |
| BUG_ON((state < PRCMU_AP_SLEEP) || (PRCMU_AP_DEEP_IDLE < state)); |
| |
| spin_lock_irqsave(&mb0_transfer.lock, flags); |
| |
| while (readl(PRCM_MBOX_CPU_VAL) & MBOX_BIT(0)) |
| cpu_relax(); |
| |
| writeb(MB0H_POWER_STATE_TRANS, (tcdm_base + PRCM_MBOX_HEADER_REQ_MB0)); |
| writeb(state, (tcdm_base + PRCM_REQ_MB0_AP_POWER_STATE)); |
| writeb((keep_ap_pll ? 1 : 0), (tcdm_base + PRCM_REQ_MB0_AP_PLL_STATE)); |
| writeb((keep_ulp_clk ? 1 : 0), |
| (tcdm_base + PRCM_REQ_MB0_ULP_CLOCK_STATE)); |
| writeb(0, (tcdm_base + PRCM_REQ_MB0_DO_NOT_WFI)); |
| writel(MBOX_BIT(0), PRCM_MBOX_CPU_SET); |
| |
| spin_unlock_irqrestore(&mb0_transfer.lock, flags); |
| |
| return 0; |
| } |
| |
| u8 db8500_prcmu_get_power_state_result(void) |
| { |
| return readb(tcdm_base + PRCM_ACK_MB0_AP_PWRSTTR_STATUS); |
| } |
| |
| /* This function should only be called while mb0_transfer.lock is held. */ |
| static void config_wakeups(void) |
| { |
| const u8 header[2] = { |
| MB0H_CONFIG_WAKEUPS_EXE, |
| MB0H_CONFIG_WAKEUPS_SLEEP |
| }; |
| static u32 last_dbb_events; |
| static u32 last_abb_events; |
| u32 dbb_events; |
| u32 abb_events; |
| unsigned int i; |
| |
| dbb_events = mb0_transfer.req.dbb_irqs | mb0_transfer.req.dbb_wakeups; |
| dbb_events |= (WAKEUP_BIT_AC_WAKE_ACK | WAKEUP_BIT_AC_SLEEP_ACK); |
| |
| abb_events = mb0_transfer.req.abb_events; |
| |
| if ((dbb_events == last_dbb_events) && (abb_events == last_abb_events)) |
| return; |
| |
| for (i = 0; i < 2; i++) { |
| while (readl(PRCM_MBOX_CPU_VAL) & MBOX_BIT(0)) |
| cpu_relax(); |
| writel(dbb_events, (tcdm_base + PRCM_REQ_MB0_WAKEUP_8500)); |
| writel(abb_events, (tcdm_base + PRCM_REQ_MB0_WAKEUP_4500)); |
| writeb(header[i], (tcdm_base + PRCM_MBOX_HEADER_REQ_MB0)); |
| writel(MBOX_BIT(0), PRCM_MBOX_CPU_SET); |
| } |
| last_dbb_events = dbb_events; |
| last_abb_events = abb_events; |
| } |
| |
| void db8500_prcmu_enable_wakeups(u32 wakeups) |
| { |
| unsigned long flags; |
| u32 bits; |
| int i; |
| |
| BUG_ON(wakeups != (wakeups & VALID_WAKEUPS)); |
| |
| for (i = 0, bits = 0; i < NUM_PRCMU_WAKEUP_INDICES; i++) { |
| if (wakeups & BIT(i)) |
| bits |= prcmu_wakeup_bit[i]; |
| } |
| |
| spin_lock_irqsave(&mb0_transfer.lock, flags); |
| |
| mb0_transfer.req.dbb_wakeups = bits; |
| config_wakeups(); |
| |
| spin_unlock_irqrestore(&mb0_transfer.lock, flags); |
| } |
| |
| void db8500_prcmu_config_abb_event_readout(u32 abb_events) |
| { |
| unsigned long flags; |
| |
| spin_lock_irqsave(&mb0_transfer.lock, flags); |
| |
| mb0_transfer.req.abb_events = abb_events; |
| config_wakeups(); |
| |
| spin_unlock_irqrestore(&mb0_transfer.lock, flags); |
| } |
| |
| void db8500_prcmu_get_abb_event_buffer(void __iomem **buf) |
| { |
| if (readb(tcdm_base + PRCM_ACK_MB0_READ_POINTER) & 1) |
| *buf = (tcdm_base + PRCM_ACK_MB0_WAKEUP_1_4500); |
| else |
| *buf = (tcdm_base + PRCM_ACK_MB0_WAKEUP_0_4500); |
| } |
| |
| /** |
| * db8500_prcmu_set_arm_opp - set the appropriate ARM OPP |
| * @opp: The new ARM operating point to which transition is to be made |
| * Returns: 0 on success, non-zero on failure |
| * |
| * This function sets the the operating point of the ARM. |
| */ |
| int db8500_prcmu_set_arm_opp(u8 opp) |
| { |
| int r; |
| |
| if (opp < ARM_NO_CHANGE || opp > ARM_EXTCLK) |
| return -EINVAL; |
| |
| r = 0; |
| |
| mutex_lock(&mb1_transfer.lock); |
| |
| while (readl(PRCM_MBOX_CPU_VAL) & MBOX_BIT(1)) |
| cpu_relax(); |
| |
| writeb(MB1H_ARM_APE_OPP, (tcdm_base + PRCM_MBOX_HEADER_REQ_MB1)); |
| writeb(opp, (tcdm_base + PRCM_REQ_MB1_ARM_OPP)); |
| writeb(APE_NO_CHANGE, (tcdm_base + PRCM_REQ_MB1_APE_OPP)); |
| |
| writel(MBOX_BIT(1), PRCM_MBOX_CPU_SET); |
| wait_for_completion(&mb1_transfer.work); |
| |
| if ((mb1_transfer.ack.header != MB1H_ARM_APE_OPP) || |
| (mb1_transfer.ack.arm_opp != opp)) |
| r = -EIO; |
| |
| mutex_unlock(&mb1_transfer.lock); |
| |
| return r; |
| } |
| |
| /** |
| * db8500_prcmu_get_arm_opp - get the current ARM OPP |
| * |
| * Returns: the current ARM OPP |
| */ |
| int db8500_prcmu_get_arm_opp(void) |
| { |
| return readb(tcdm_base + PRCM_ACK_MB1_CURRENT_ARM_OPP); |
| } |
| |
| /** |
| * db8500_prcmu_get_ddr_opp - get the current DDR OPP |
| * |
| * Returns: the current DDR OPP |
| */ |
| int db8500_prcmu_get_ddr_opp(void) |
| { |
| return readb(PRCM_DDR_SUBSYS_APE_MINBW); |
| } |
| |
| /** |
| * db8500_set_ddr_opp - set the appropriate DDR OPP |
| * @opp: The new DDR operating point to which transition is to be made |
| * Returns: 0 on success, non-zero on failure |
| * |
| * This function sets the operating point of the DDR. |
| */ |
| static bool enable_set_ddr_opp; |
| int db8500_prcmu_set_ddr_opp(u8 opp) |
| { |
| if (opp < DDR_100_OPP || opp > DDR_25_OPP) |
| return -EINVAL; |
| /* Changing the DDR OPP can hang the hardware pre-v21 */ |
| if (enable_set_ddr_opp) |
| writeb(opp, PRCM_DDR_SUBSYS_APE_MINBW); |
| |
| return 0; |
| } |
| |
| /* Divide the frequency of certain clocks by 2 for APE_50_PARTLY_25_OPP. */ |
| static void request_even_slower_clocks(bool enable) |
| { |
| u32 clock_reg[] = { |
| PRCM_ACLK_MGT, |
| PRCM_DMACLK_MGT |
| }; |
| unsigned long flags; |
| unsigned int i; |
| |
| spin_lock_irqsave(&clk_mgt_lock, flags); |
| |
| /* Grab the HW semaphore. */ |
| while ((readl(PRCM_SEM) & PRCM_SEM_PRCM_SEM) != 0) |
| cpu_relax(); |
| |
| for (i = 0; i < ARRAY_SIZE(clock_reg); i++) { |
| u32 val; |
| u32 div; |
| |
| val = readl(prcmu_base + clock_reg[i]); |
| div = (val & PRCM_CLK_MGT_CLKPLLDIV_MASK); |
| if (enable) { |
| if ((div <= 1) || (div > 15)) { |
| pr_err("prcmu: Bad clock divider %d in %s\n", |
| div, __func__); |
| goto unlock_and_return; |
| } |
| div <<= 1; |
| } else { |
| if (div <= 2) |
| goto unlock_and_return; |
| div >>= 1; |
| } |
| val = ((val & ~PRCM_CLK_MGT_CLKPLLDIV_MASK) | |
| (div & PRCM_CLK_MGT_CLKPLLDIV_MASK)); |
| writel(val, prcmu_base + clock_reg[i]); |
| } |
| |
| unlock_and_return: |
| /* Release the HW semaphore. */ |
| writel(0, PRCM_SEM); |
| |
| spin_unlock_irqrestore(&clk_mgt_lock, flags); |
| } |
| |
| /** |
| * db8500_set_ape_opp - set the appropriate APE OPP |
| * @opp: The new APE operating point to which transition is to be made |
| * Returns: 0 on success, non-zero on failure |
| * |
| * This function sets the operating point of the APE. |
| */ |
| int db8500_prcmu_set_ape_opp(u8 opp) |
| { |
| int r = 0; |
| |
| if (opp == mb1_transfer.ape_opp) |
| return 0; |
| |
| mutex_lock(&mb1_transfer.lock); |
| |
| if (mb1_transfer.ape_opp == APE_50_PARTLY_25_OPP) |
| request_even_slower_clocks(false); |
| |
| if ((opp != APE_100_OPP) && (mb1_transfer.ape_opp != APE_100_OPP)) |
| goto skip_message; |
| |
| while (readl(PRCM_MBOX_CPU_VAL) & MBOX_BIT(1)) |
| cpu_relax(); |
| |
| writeb(MB1H_ARM_APE_OPP, (tcdm_base + PRCM_MBOX_HEADER_REQ_MB1)); |
| writeb(ARM_NO_CHANGE, (tcdm_base + PRCM_REQ_MB1_ARM_OPP)); |
| writeb(((opp == APE_50_PARTLY_25_OPP) ? APE_50_OPP : opp), |
| (tcdm_base + PRCM_REQ_MB1_APE_OPP)); |
| |
| writel(MBOX_BIT(1), PRCM_MBOX_CPU_SET); |
| wait_for_completion(&mb1_transfer.work); |
| |
| if ((mb1_transfer.ack.header != MB1H_ARM_APE_OPP) || |
| (mb1_transfer.ack.ape_opp != opp)) |
| r = -EIO; |
| |
| skip_message: |
| if ((!r && (opp == APE_50_PARTLY_25_OPP)) || |
| (r && (mb1_transfer.ape_opp == APE_50_PARTLY_25_OPP))) |
| request_even_slower_clocks(true); |
| if (!r) |
| mb1_transfer.ape_opp = opp; |
| |
| mutex_unlock(&mb1_transfer.lock); |
| |
| return r; |
| } |
| |
| /** |
| * db8500_prcmu_get_ape_opp - get the current APE OPP |
| * |
| * Returns: the current APE OPP |
| */ |
| int db8500_prcmu_get_ape_opp(void) |
| { |
| return readb(tcdm_base + PRCM_ACK_MB1_CURRENT_APE_OPP); |
| } |
| |
| /** |
| * db8500_prcmu_request_ape_opp_100_voltage - Request APE OPP 100% voltage |
| * @enable: true to request the higher voltage, false to drop a request. |
| * |
| * Calls to this function to enable and disable requests must be balanced. |
| */ |
| int db8500_prcmu_request_ape_opp_100_voltage(bool enable) |
| { |
| int r = 0; |
| u8 header; |
| static unsigned int requests; |
| |
| mutex_lock(&mb1_transfer.lock); |
| |
| if (enable) { |
| if (0 != requests++) |
| goto unlock_and_return; |
| header = MB1H_REQUEST_APE_OPP_100_VOLT; |
| } else { |
| if (requests == 0) { |
| r = -EIO; |
| goto unlock_and_return; |
| } else if (1 != requests--) { |
| goto unlock_and_return; |
| } |
| header = MB1H_RELEASE_APE_OPP_100_VOLT; |
| } |
| |
| while (readl(PRCM_MBOX_CPU_VAL) & MBOX_BIT(1)) |
| cpu_relax(); |
| |
| writeb(header, (tcdm_base + PRCM_MBOX_HEADER_REQ_MB1)); |
| |
| writel(MBOX_BIT(1), PRCM_MBOX_CPU_SET); |
| wait_for_completion(&mb1_transfer.work); |
| |
| if ((mb1_transfer.ack.header != header) || |
| ((mb1_transfer.ack.ape_voltage_status & BIT(0)) != 0)) |
| r = -EIO; |
| |
| unlock_and_return: |
| mutex_unlock(&mb1_transfer.lock); |
| |
| return r; |
| } |
| |
| /** |
| * prcmu_release_usb_wakeup_state - release the state required by a USB wakeup |
| * |
| * This function releases the power state requirements of a USB wakeup. |
| */ |
| int prcmu_release_usb_wakeup_state(void) |
| { |
| int r = 0; |
| |
| mutex_lock(&mb1_transfer.lock); |
| |
| while (readl(PRCM_MBOX_CPU_VAL) & MBOX_BIT(1)) |
| cpu_relax(); |
| |
| writeb(MB1H_RELEASE_USB_WAKEUP, |
| (tcdm_base + PRCM_MBOX_HEADER_REQ_MB1)); |
| |
| writel(MBOX_BIT(1), PRCM_MBOX_CPU_SET); |
| wait_for_completion(&mb1_transfer.work); |
| |
| if ((mb1_transfer.ack.header != MB1H_RELEASE_USB_WAKEUP) || |
| ((mb1_transfer.ack.ape_voltage_status & BIT(0)) != 0)) |
| r = -EIO; |
| |
| mutex_unlock(&mb1_transfer.lock); |
| |
| return r; |
| } |
| |
| static int request_pll(u8 clock, bool enable) |
| { |
| int r = 0; |
| |
| if (clock == PRCMU_PLLSOC0) |
| clock = (enable ? PLL_SOC0_ON : PLL_SOC0_OFF); |
| else if (clock == PRCMU_PLLSOC1) |
| clock = (enable ? PLL_SOC1_ON : PLL_SOC1_OFF); |
| else |
| return -EINVAL; |
| |
| mutex_lock(&mb1_transfer.lock); |
| |
| while (readl(PRCM_MBOX_CPU_VAL) & MBOX_BIT(1)) |
| cpu_relax(); |
| |
| writeb(MB1H_PLL_ON_OFF, (tcdm_base + PRCM_MBOX_HEADER_REQ_MB1)); |
| writeb(clock, (tcdm_base + PRCM_REQ_MB1_PLL_ON_OFF)); |
| |
| writel(MBOX_BIT(1), PRCM_MBOX_CPU_SET); |
| wait_for_completion(&mb1_transfer.work); |
| |
| if (mb1_transfer.ack.header != MB1H_PLL_ON_OFF) |
| r = -EIO; |
| |
| mutex_unlock(&mb1_transfer.lock); |
| |
| return r; |
| } |
| |
| /** |
| * db8500_prcmu_set_epod - set the state of a EPOD (power domain) |
| * @epod_id: The EPOD to set |
| * @epod_state: The new EPOD state |
| * |
| * This function sets the state of a EPOD (power domain). It may not be called |
| * from interrupt context. |
| */ |
| int db8500_prcmu_set_epod(u16 epod_id, u8 epod_state) |
| { |
| int r = 0; |
| bool ram_retention = false; |
| int i; |
| |
| /* check argument */ |
| BUG_ON(epod_id >= NUM_EPOD_ID); |
| |
| /* set flag if retention is possible */ |
| switch (epod_id) { |
| case EPOD_ID_SVAMMDSP: |
| case EPOD_ID_SIAMMDSP: |
| case EPOD_ID_ESRAM12: |
| case EPOD_ID_ESRAM34: |
| ram_retention = true; |
| break; |
| } |
| |
| /* check argument */ |
| BUG_ON(epod_state > EPOD_STATE_ON); |
| BUG_ON(epod_state == EPOD_STATE_RAMRET && !ram_retention); |
| |
| /* get lock */ |
| mutex_lock(&mb2_transfer.lock); |
| |
| /* wait for mailbox */ |
| while (readl(PRCM_MBOX_CPU_VAL) & MBOX_BIT(2)) |
| cpu_relax(); |
| |
| /* fill in mailbox */ |
| for (i = 0; i < NUM_EPOD_ID; i++) |
| writeb(EPOD_STATE_NO_CHANGE, (tcdm_base + PRCM_REQ_MB2 + i)); |
| writeb(epod_state, (tcdm_base + PRCM_REQ_MB2 + epod_id)); |
| |
| writeb(MB2H_DPS, (tcdm_base + PRCM_MBOX_HEADER_REQ_MB2)); |
| |
| writel(MBOX_BIT(2), PRCM_MBOX_CPU_SET); |
| |
| /* |
| * The current firmware version does not handle errors correctly, |
| * and we cannot recover if there is an error. |
| * This is expected to change when the firmware is updated. |
| */ |
| if (!wait_for_completion_timeout(&mb2_transfer.work, |
| msecs_to_jiffies(20000))) { |
| pr_err("prcmu: %s timed out (20 s) waiting for a reply.\n", |
| __func__); |
| r = -EIO; |
| goto unlock_and_return; |
| } |
| |
| if (mb2_transfer.ack.status != HWACC_PWR_ST_OK) |
| r = -EIO; |
| |
| unlock_and_return: |
| mutex_unlock(&mb2_transfer.lock); |
| return r; |
| } |
| |
| /** |
| * prcmu_configure_auto_pm - Configure autonomous power management. |
| * @sleep: Configuration for ApSleep. |
| * @idle: Configuration for ApIdle. |
| */ |
| void prcmu_configure_auto_pm(struct prcmu_auto_pm_config *sleep, |
| struct prcmu_auto_pm_config *idle) |
| { |
| u32 sleep_cfg; |
| u32 idle_cfg; |
| unsigned long flags; |
| |
| BUG_ON((sleep == NULL) || (idle == NULL)); |
| |
| sleep_cfg = (sleep->sva_auto_pm_enable & 0xF); |
| sleep_cfg = ((sleep_cfg << 4) | (sleep->sia_auto_pm_enable & 0xF)); |
| sleep_cfg = ((sleep_cfg << 8) | (sleep->sva_power_on & 0xFF)); |
| sleep_cfg = ((sleep_cfg << 8) | (sleep->sia_power_on & 0xFF)); |
| sleep_cfg = ((sleep_cfg << 4) | (sleep->sva_policy & 0xF)); |
| sleep_cfg = ((sleep_cfg << 4) | (sleep->sia_policy & 0xF)); |
| |
| idle_cfg = (idle->sva_auto_pm_enable & 0xF); |
| idle_cfg = ((idle_cfg << 4) | (idle->sia_auto_pm_enable & 0xF)); |
| idle_cfg = ((idle_cfg << 8) | (idle->sva_power_on & 0xFF)); |
| idle_cfg = ((idle_cfg << 8) | (idle->sia_power_on & 0xFF)); |
| idle_cfg = ((idle_cfg << 4) | (idle->sva_policy & 0xF)); |
| idle_cfg = ((idle_cfg << 4) | (idle->sia_policy & 0xF)); |
| |
| spin_lock_irqsave(&mb2_transfer.auto_pm_lock, flags); |
| |
| /* |
| * The autonomous power management configuration is done through |
| * fields in mailbox 2, but these fields are only used as shared |
| * variables - i.e. there is no need to send a message. |
| */ |
| writel(sleep_cfg, (tcdm_base + PRCM_REQ_MB2_AUTO_PM_SLEEP)); |
| writel(idle_cfg, (tcdm_base + PRCM_REQ_MB2_AUTO_PM_IDLE)); |
| |
| mb2_transfer.auto_pm_enabled = |
| ((sleep->sva_auto_pm_enable == PRCMU_AUTO_PM_ON) || |
| (sleep->sia_auto_pm_enable == PRCMU_AUTO_PM_ON) || |
| (idle->sva_auto_pm_enable == PRCMU_AUTO_PM_ON) || |
| (idle->sia_auto_pm_enable == PRCMU_AUTO_PM_ON)); |
| |
| spin_unlock_irqrestore(&mb2_transfer.auto_pm_lock, flags); |
| } |
| EXPORT_SYMBOL(prcmu_configure_auto_pm); |
| |
| bool prcmu_is_auto_pm_enabled(void) |
| { |
| return mb2_transfer.auto_pm_enabled; |
| } |
| |
| static int request_sysclk(bool enable) |
| { |
| int r; |
| unsigned long flags; |
| |
| r = 0; |
| |
| mutex_lock(&mb3_transfer.sysclk_lock); |
| |
| spin_lock_irqsave(&mb3_transfer.lock, flags); |
| |
| while (readl(PRCM_MBOX_CPU_VAL) & MBOX_BIT(3)) |
| cpu_relax(); |
| |
| writeb((enable ? ON : OFF), (tcdm_base + PRCM_REQ_MB3_SYSCLK_MGT)); |
| |
| writeb(MB3H_SYSCLK, (tcdm_base + PRCM_MBOX_HEADER_REQ_MB3)); |
| writel(MBOX_BIT(3), PRCM_MBOX_CPU_SET); |
| |
| spin_unlock_irqrestore(&mb3_transfer.lock, flags); |
| |
| /* |
| * The firmware only sends an ACK if we want to enable the |
| * SysClk, and it succeeds. |
| */ |
| if (enable && !wait_for_completion_timeout(&mb3_transfer.sysclk_work, |
| msecs_to_jiffies(20000))) { |
| pr_err("prcmu: %s timed out (20 s) waiting for a reply.\n", |
| __func__); |
| r = -EIO; |
| } |
| |
| mutex_unlock(&mb3_transfer.sysclk_lock); |
| |
| return r; |
| } |
| |
| static int request_timclk(bool enable) |
| { |
| u32 val = (PRCM_TCR_DOZE_MODE | PRCM_TCR_TENSEL_MASK); |
| |
| if (!enable) |
| val |= PRCM_TCR_STOP_TIMERS; |
| writel(val, PRCM_TCR); |
| |
| return 0; |
| } |
| |
| static int request_clock(u8 clock, bool enable) |
| { |
| u32 val; |
| unsigned long flags; |
| |
| spin_lock_irqsave(&clk_mgt_lock, flags); |
| |
| /* Grab the HW semaphore. */ |
| while ((readl(PRCM_SEM) & PRCM_SEM_PRCM_SEM) != 0) |
| cpu_relax(); |
| |
| val = readl(prcmu_base + clk_mgt[clock].offset); |
| if (enable) { |
| val |= (PRCM_CLK_MGT_CLKEN | clk_mgt[clock].pllsw); |
| } else { |
| clk_mgt[clock].pllsw = (val & PRCM_CLK_MGT_CLKPLLSW_MASK); |
| val &= ~(PRCM_CLK_MGT_CLKEN | PRCM_CLK_MGT_CLKPLLSW_MASK); |
| } |
| writel(val, prcmu_base + clk_mgt[clock].offset); |
| |
| /* Release the HW semaphore. */ |
| writel(0, PRCM_SEM); |
| |
| spin_unlock_irqrestore(&clk_mgt_lock, flags); |
| |
| return 0; |
| } |
| |
| static int request_sga_clock(u8 clock, bool enable) |
| { |
| u32 val; |
| int ret; |
| |
| if (enable) { |
| val = readl(PRCM_CGATING_BYPASS); |
| writel(val | PRCM_CGATING_BYPASS_ICN2, PRCM_CGATING_BYPASS); |
| } |
| |
| ret = request_clock(clock, enable); |
| |
| if (!ret && !enable) { |
| val = readl(PRCM_CGATING_BYPASS); |
| writel(val & ~PRCM_CGATING_BYPASS_ICN2, PRCM_CGATING_BYPASS); |
| } |
| |
| return ret; |
| } |
| |
| static inline bool plldsi_locked(void) |
| { |
| return (readl(PRCM_PLLDSI_LOCKP) & |
| (PRCM_PLLDSI_LOCKP_PRCM_PLLDSI_LOCKP10 | |
| PRCM_PLLDSI_LOCKP_PRCM_PLLDSI_LOCKP3)) == |
| (PRCM_PLLDSI_LOCKP_PRCM_PLLDSI_LOCKP10 | |
| PRCM_PLLDSI_LOCKP_PRCM_PLLDSI_LOCKP3); |
| } |
| |
| static int request_plldsi(bool enable) |
| { |
| int r = 0; |
| u32 val; |
| |
| writel((PRCM_MMIP_LS_CLAMP_DSIPLL_CLAMP | |
| PRCM_MMIP_LS_CLAMP_DSIPLL_CLAMPI), (enable ? |
| PRCM_MMIP_LS_CLAMP_CLR : PRCM_MMIP_LS_CLAMP_SET)); |
| |
| val = readl(PRCM_PLLDSI_ENABLE); |
| if (enable) |
| val |= PRCM_PLLDSI_ENABLE_PRCM_PLLDSI_ENABLE; |
| else |
| val &= ~PRCM_PLLDSI_ENABLE_PRCM_PLLDSI_ENABLE; |
| writel(val, PRCM_PLLDSI_ENABLE); |
| |
| if (enable) { |
| unsigned int i; |
| bool locked = plldsi_locked(); |
| |
| for (i = 10; !locked && (i > 0); --i) { |
| udelay(100); |
| locked = plldsi_locked(); |
| } |
| if (locked) { |
| writel(PRCM_APE_RESETN_DSIPLL_RESETN, |
| PRCM_APE_RESETN_SET); |
| } else { |
| writel((PRCM_MMIP_LS_CLAMP_DSIPLL_CLAMP | |
| PRCM_MMIP_LS_CLAMP_DSIPLL_CLAMPI), |
| PRCM_MMIP_LS_CLAMP_SET); |
| val &= ~PRCM_PLLDSI_ENABLE_PRCM_PLLDSI_ENABLE; |
| writel(val, PRCM_PLLDSI_ENABLE); |
| r = -EAGAIN; |
| } |
| } else { |
| writel(PRCM_APE_RESETN_DSIPLL_RESETN, PRCM_APE_RESETN_CLR); |
| } |
| return r; |
| } |
| |
| static int request_dsiclk(u8 n, bool enable) |
| { |
| u32 val; |
| |
| val = readl(PRCM_DSI_PLLOUT_SEL); |
| val &= ~dsiclk[n].divsel_mask; |
| val |= ((enable ? dsiclk[n].divsel : PRCM_DSI_PLLOUT_SEL_OFF) << |
| dsiclk[n].divsel_shift); |
| writel(val, PRCM_DSI_PLLOUT_SEL); |
| return 0; |
| } |
| |
| static int request_dsiescclk(u8 n, bool enable) |
| { |
| u32 val; |
| |
| val = readl(PRCM_DSITVCLK_DIV); |
| enable ? (val |= dsiescclk[n].en) : (val &= ~dsiescclk[n].en); |
| writel(val, PRCM_DSITVCLK_DIV); |
| return 0; |
| } |
| |
| /** |
| * db8500_prcmu_request_clock() - Request for a clock to be enabled or disabled. |
| * @clock: The clock for which the request is made. |
| * @enable: Whether the clock should be enabled (true) or disabled (false). |
| * |
| * This function should only be used by the clock implementation. |
| * Do not use it from any other place! |
| */ |
| int db8500_prcmu_request_clock(u8 clock, bool enable) |
| { |
| if (clock == PRCMU_SGACLK) |
| return request_sga_clock(clock, enable); |
| else if (clock < PRCMU_NUM_REG_CLOCKS) |
| return request_clock(clock, enable); |
| else if (clock == PRCMU_TIMCLK) |
| return request_timclk(enable); |
| else if ((clock == PRCMU_DSI0CLK) || (clock == PRCMU_DSI1CLK)) |
| return request_dsiclk((clock - PRCMU_DSI0CLK), enable); |
| else if ((PRCMU_DSI0ESCCLK <= clock) && (clock <= PRCMU_DSI2ESCCLK)) |
| return request_dsiescclk((clock - PRCMU_DSI0ESCCLK), enable); |
| else if (clock == PRCMU_PLLDSI) |
| return request_plldsi(enable); |
| else if (clock == PRCMU_SYSCLK) |
| return request_sysclk(enable); |
| else if ((clock == PRCMU_PLLSOC0) || (clock == PRCMU_PLLSOC1)) |
| return request_pll(clock, enable); |
| else |
| return -EINVAL; |
| } |
| |
| static unsigned long pll_rate(void __iomem *reg, unsigned long src_rate, |
| int branch) |
| { |
| u64 rate; |
| u32 val; |
| u32 d; |
| u32 div = 1; |
| |
| val = readl(reg); |
| |
| rate = src_rate; |
| rate *= ((val & PRCM_PLL_FREQ_D_MASK) >> PRCM_PLL_FREQ_D_SHIFT); |
| |
| d = ((val & PRCM_PLL_FREQ_N_MASK) >> PRCM_PLL_FREQ_N_SHIFT); |
| if (d > 1) |
| div *= d; |
| |
| d = ((val & PRCM_PLL_FREQ_R_MASK) >> PRCM_PLL_FREQ_R_SHIFT); |
| if (d > 1) |
| div *= d; |
| |
| if (val & PRCM_PLL_FREQ_SELDIV2) |
| div *= 2; |
| |
| if ((branch == PLL_FIX) || ((branch == PLL_DIV) && |
| (val & PRCM_PLL_FREQ_DIV2EN) && |
| ((reg == PRCM_PLLSOC0_FREQ) || |
| (reg == PRCM_PLLARM_FREQ) || |
| (reg == PRCM_PLLDDR_FREQ)))) |
| div *= 2; |
| |
| (void)do_div(rate, div); |
| |
| return (unsigned long)rate; |
| } |
| |
| #define ROOT_CLOCK_RATE 38400000 |
| |
| static unsigned long clock_rate(u8 clock) |
| { |
| u32 val; |
| u32 pllsw; |
| unsigned long rate = ROOT_CLOCK_RATE; |
| |
| val = readl(prcmu_base + clk_mgt[clock].offset); |
| |
| if (val & PRCM_CLK_MGT_CLK38) { |
| if (clk_mgt[clock].clk38div && (val & PRCM_CLK_MGT_CLK38DIV)) |
| rate /= 2; |
| return rate; |
| } |
| |
| val |= clk_mgt[clock].pllsw; |
| pllsw = (val & PRCM_CLK_MGT_CLKPLLSW_MASK); |
| |
| if (pllsw == PRCM_CLK_MGT_CLKPLLSW_SOC0) |
| rate = pll_rate(PRCM_PLLSOC0_FREQ, rate, clk_mgt[clock].branch); |
| else if (pllsw == PRCM_CLK_MGT_CLKPLLSW_SOC1) |
| rate = pll_rate(PRCM_PLLSOC1_FREQ, rate, clk_mgt[clock].branch); |
| else if (pllsw == PRCM_CLK_MGT_CLKPLLSW_DDR) |
| rate = pll_rate(PRCM_PLLDDR_FREQ, rate, clk_mgt[clock].branch); |
| else |
| return 0; |
| |
| if ((clock == PRCMU_SGACLK) && |
| (val & PRCM_SGACLK_MGT_SGACLKDIV_BY_2_5_EN)) { |
| u64 r = (rate * 10); |
| |
| (void)do_div(r, 25); |
| return (unsigned long)r; |
| } |
| val &= PRCM_CLK_MGT_CLKPLLDIV_MASK; |
| if (val) |
| return rate / val; |
| else |
| return 0; |
| } |
| |
| static unsigned long armss_rate(void) |
| { |
| u32 r; |
| unsigned long rate; |
| |
| r = readl(PRCM_ARM_CHGCLKREQ); |
| |
| if (r & PRCM_ARM_CHGCLKREQ_PRCM_ARM_CHGCLKREQ) { |
| /* External ARMCLKFIX clock */ |
| |
| rate = pll_rate(PRCM_PLLDDR_FREQ, ROOT_CLOCK_RATE, PLL_FIX); |
| |
| /* Check PRCM_ARM_CHGCLKREQ divider */ |
| if (!(r & PRCM_ARM_CHGCLKREQ_PRCM_ARM_DIVSEL)) |
| rate /= 2; |
| |
| /* Check PRCM_ARMCLKFIX_MGT divider */ |
| r = readl(PRCM_ARMCLKFIX_MGT); |
| r &= PRCM_CLK_MGT_CLKPLLDIV_MASK; |
| rate /= r; |
| |
| } else {/* ARM PLL */ |
| rate = pll_rate(PRCM_PLLARM_FREQ, ROOT_CLOCK_RATE, PLL_DIV); |
| } |
| |
| return rate; |
| } |
| |
| static unsigned long dsiclk_rate(u8 n) |
| { |
| u32 divsel; |
| u32 div = 1; |
| |
| divsel = readl(PRCM_DSI_PLLOUT_SEL); |
| divsel = ((divsel & dsiclk[n].divsel_mask) >> dsiclk[n].divsel_shift); |
| |
| if (divsel == PRCM_DSI_PLLOUT_SEL_OFF) |
| divsel = dsiclk[n].divsel; |
| else |
| dsiclk[n].divsel = divsel; |
| |
| switch (divsel) { |
| case PRCM_DSI_PLLOUT_SEL_PHI_4: |
| div *= 2; |
| case PRCM_DSI_PLLOUT_SEL_PHI_2: |
| div *= 2; |
| case PRCM_DSI_PLLOUT_SEL_PHI: |
| return pll_rate(PRCM_PLLDSI_FREQ, clock_rate(PRCMU_HDMICLK), |
| PLL_RAW) / div; |
| default: |
| return 0; |
| } |
| } |
| |
| static unsigned long dsiescclk_rate(u8 n) |
| { |
| u32 div; |
| |
| div = readl(PRCM_DSITVCLK_DIV); |
| div = ((div & dsiescclk[n].div_mask) >> (dsiescclk[n].div_shift)); |
| return clock_rate(PRCMU_TVCLK) / max((u32)1, div); |
| } |
| |
| unsigned long prcmu_clock_rate(u8 clock) |
| { |
| if (clock < PRCMU_NUM_REG_CLOCKS) |
| return clock_rate(clock); |
| else if (clock == PRCMU_TIMCLK) |
| return ROOT_CLOCK_RATE / 16; |
| else if (clock == PRCMU_SYSCLK) |
| return ROOT_CLOCK_RATE; |
| else if (clock == PRCMU_PLLSOC0) |
| return pll_rate(PRCM_PLLSOC0_FREQ, ROOT_CLOCK_RATE, PLL_RAW); |
| else if (clock == PRCMU_PLLSOC1) |
| return pll_rate(PRCM_PLLSOC1_FREQ, ROOT_CLOCK_RATE, PLL_RAW); |
| else if (clock == PRCMU_ARMSS) |
| return armss_rate(); |
| else if (clock == PRCMU_PLLDDR) |
| return pll_rate(PRCM_PLLDDR_FREQ, ROOT_CLOCK_RATE, PLL_RAW); |
| else if (clock == PRCMU_PLLDSI) |
| return pll_rate(PRCM_PLLDSI_FREQ, clock_rate(PRCMU_HDMICLK), |
| PLL_RAW); |
| else if ((clock == PRCMU_DSI0CLK) || (clock == PRCMU_DSI1CLK)) |
| return dsiclk_rate(clock - PRCMU_DSI0CLK); |
| else if ((PRCMU_DSI0ESCCLK <= clock) && (clock <= PRCMU_DSI2ESCCLK)) |
| return dsiescclk_rate(clock - PRCMU_DSI0ESCCLK); |
| else |
| return 0; |
| } |
| |
| static unsigned long clock_source_rate(u32 clk_mgt_val, int branch) |
| { |
| if (clk_mgt_val & PRCM_CLK_MGT_CLK38) |
| return ROOT_CLOCK_RATE; |
| clk_mgt_val &= PRCM_CLK_MGT_CLKPLLSW_MASK; |
| if (clk_mgt_val == PRCM_CLK_MGT_CLKPLLSW_SOC0) |
| return pll_rate(PRCM_PLLSOC0_FREQ, ROOT_CLOCK_RATE, branch); |
| else if (clk_mgt_val == PRCM_CLK_MGT_CLKPLLSW_SOC1) |
| return pll_rate(PRCM_PLLSOC1_FREQ, ROOT_CLOCK_RATE, branch); |
| else if (clk_mgt_val == PRCM_CLK_MGT_CLKPLLSW_DDR) |
| return pll_rate(PRCM_PLLDDR_FREQ, ROOT_CLOCK_RATE, branch); |
| else |
| return 0; |
| } |
| |
| static u32 clock_divider(unsigned long src_rate, unsigned long rate) |
| { |
| u32 div; |
| |
| div = (src_rate / rate); |
| if (div == 0) |
| return 1; |
| if (rate < (src_rate / div)) |
| div++; |
| return div; |
| } |
| |
| static long round_clock_rate(u8 clock, unsigned long rate) |
| { |
| u32 val; |
| u32 div; |
| unsigned long src_rate; |
| long rounded_rate; |
| |
| val = readl(prcmu_base + clk_mgt[clock].offset); |
| src_rate = clock_source_rate((val | clk_mgt[clock].pllsw), |
| clk_mgt[clock].branch); |
| div = clock_divider(src_rate, rate); |
| if (val & PRCM_CLK_MGT_CLK38) { |
| if (clk_mgt[clock].clk38div) { |
| if (div > 2) |
| div = 2; |
| } else { |
| div = 1; |
| } |
| } else if ((clock == PRCMU_SGACLK) && (div == 3)) { |
| u64 r = (src_rate * 10); |
| |
| (void)do_div(r, 25); |
| if (r <= rate) |
| return (unsigned long)r; |
| } |
| rounded_rate = (src_rate / min(div, (u32)31)); |
| |
| return rounded_rate; |
| } |
| |
| /* CPU FREQ table, may be changed due to if MAX_OPP is supported. */ |
| static struct cpufreq_frequency_table db8500_cpufreq_table[] = { |
| { .frequency = 200000, .driver_data = ARM_EXTCLK,}, |
| { .frequency = 400000, .driver_data = ARM_50_OPP,}, |
| { .frequency = 800000, .driver_data = ARM_100_OPP,}, |
| { .frequency = CPUFREQ_TABLE_END,}, /* To be used for MAX_OPP. */ |
| { .frequency = CPUFREQ_TABLE_END,}, |
| }; |
| |
| static long round_armss_rate(unsigned long rate) |
| { |
| struct cpufreq_frequency_table *pos; |
| long freq = 0; |
| |
| /* cpufreq table frequencies is in KHz. */ |
| rate = rate / 1000; |
| |
| /* Find the corresponding arm opp from the cpufreq table. */ |
| cpufreq_for_each_entry(pos, db8500_cpufreq_table) { |
| freq = pos->frequency; |
| if (freq == rate) |
| break; |
| } |
| |
| /* Return the last valid value, even if a match was not found. */ |
| return freq * 1000; |
| } |
| |
| #define MIN_PLL_VCO_RATE 600000000ULL |
| #define MAX_PLL_VCO_RATE 1680640000ULL |
| |
| static long round_plldsi_rate(unsigned long rate) |
| { |
| long rounded_rate = 0; |
| unsigned long src_rate; |
| unsigned long rem; |
| u32 r; |
| |
| src_rate = clock_rate(PRCMU_HDMICLK); |
| rem = rate; |
| |
| for (r = 7; (rem > 0) && (r > 0); r--) { |
| u64 d; |
| |
| d = (r * rate); |
| (void)do_div(d, src_rate); |
| if (d < 6) |
| d = 6; |
| else if (d > 255) |
| d = 255; |
| d *= src_rate; |
| if (((2 * d) < (r * MIN_PLL_VCO_RATE)) || |
| ((r * MAX_PLL_VCO_RATE) < (2 * d))) |
| continue; |
| (void)do_div(d, r); |
| if (rate < d) { |
| if (rounded_rate == 0) |
| rounded_rate = (long)d; |
| break; |
| } |
| if ((rate - d) < rem) { |
| rem = (rate - d); |
| rounded_rate = (long)d; |
| } |
| } |
| return rounded_rate; |
| } |
| |
| static long round_dsiclk_rate(unsigned long rate) |
| { |
| u32 div; |
| unsigned long src_rate; |
| long rounded_rate; |
| |
| src_rate = pll_rate(PRCM_PLLDSI_FREQ, clock_rate(PRCMU_HDMICLK), |
| PLL_RAW); |
| div = clock_divider(src_rate, rate); |
| rounded_rate = (src_rate / ((div > 2) ? 4 : div)); |
| |
| return rounded_rate; |
| } |
| |
| static long round_dsiescclk_rate(unsigned long rate) |
| { |
| u32 div; |
| unsigned long src_rate; |
| long rounded_rate; |
| |
| src_rate = clock_rate(PRCMU_TVCLK); |
| div = clock_divider(src_rate, rate); |
| rounded_rate = (src_rate / min(div, (u32)255)); |
| |
| return rounded_rate; |
| } |
| |
| long prcmu_round_clock_rate(u8 clock, unsigned long rate) |
| { |
| if (clock < PRCMU_NUM_REG_CLOCKS) |
| return round_clock_rate(clock, rate); |
| else if (clock == PRCMU_ARMSS) |
| return round_armss_rate(rate); |
| else if (clock == PRCMU_PLLDSI) |
| return round_plldsi_rate(rate); |
| else if ((clock == PRCMU_DSI0CLK) || (clock == PRCMU_DSI1CLK)) |
| return round_dsiclk_rate(rate); |
| else if ((PRCMU_DSI0ESCCLK <= clock) && (clock <= PRCMU_DSI2ESCCLK)) |
| return round_dsiescclk_rate(rate); |
| else |
| return (long)prcmu_clock_rate(clock); |
| } |
| |
| static void set_clock_rate(u8 clock, unsigned long rate) |
| { |
| u32 val; |
| u32 div; |
| unsigned long src_rate; |
| unsigned long flags; |
| |
| spin_lock_irqsave(&clk_mgt_lock, flags); |
| |
| /* Grab the HW semaphore. */ |
| while ((readl(PRCM_SEM) & PRCM_SEM_PRCM_SEM) != 0) |
| cpu_relax(); |
| |
| val = readl(prcmu_base + clk_mgt[clock].offset); |
| src_rate = clock_source_rate((val | clk_mgt[clock].pllsw), |
| clk_mgt[clock].branch); |
| div = clock_divider(src_rate, rate); |
| if (val & PRCM_CLK_MGT_CLK38) { |
| if (clk_mgt[clock].clk38div) { |
| if (div > 1) |
| val |= PRCM_CLK_MGT_CLK38DIV; |
| else |
| val &= ~PRCM_CLK_MGT_CLK38DIV; |
| } |
| } else if (clock == PRCMU_SGACLK) { |
| val &= ~(PRCM_CLK_MGT_CLKPLLDIV_MASK | |
| PRCM_SGACLK_MGT_SGACLKDIV_BY_2_5_EN); |
| if (div == 3) { |
| u64 r = (src_rate * 10); |
| |
| (void)do_div(r, 25); |
| if (r <= rate) { |
| val |= PRCM_SGACLK_MGT_SGACLKDIV_BY_2_5_EN; |
| div = 0; |
| } |
| } |
| val |= min(div, (u32)31); |
| } else { |
| val &= ~PRCM_CLK_MGT_CLKPLLDIV_MASK; |
| val |= min(div, (u32)31); |
| } |
| writel(val, prcmu_base + clk_mgt[clock].offset); |
| |
| /* Release the HW semaphore. */ |
| writel(0, PRCM_SEM); |
| |
| spin_unlock_irqrestore(&clk_mgt_lock, flags); |
| } |
| |
| static int set_armss_rate(unsigned long rate) |
| { |
| struct cpufreq_frequency_table *pos; |
| |
| /* cpufreq table frequencies is in KHz. */ |
| rate = rate / 1000; |
| |
| /* Find the corresponding arm opp from the cpufreq table. */ |
| cpufreq_for_each_entry(pos, db8500_cpufreq_table) |
| if (pos->frequency == rate) |
| break; |
| |
| if (pos->frequency != rate) |
| return -EINVAL; |
| |
| /* Set the new arm opp. */ |
| return db8500_prcmu_set_arm_opp(pos->driver_data); |
| } |
| |
| static int set_plldsi_rate(unsigned long rate) |
| { |
| unsigned long src_rate; |
| unsigned long rem; |
| u32 pll_freq = 0; |
| u32 r; |
| |
| src_rate = clock_rate(PRCMU_HDMICLK); |
| rem = rate; |
| |
| for (r = 7; (rem > 0) && (r > 0); r--) { |
| u64 d; |
| u64 hwrate; |
| |
| d = (r * rate); |
| (void)do_div(d, src_rate); |
| if (d < 6) |
| d = 6; |
| else if (d > 255) |
| d = 255; |
| hwrate = (d * src_rate); |
| if (((2 * hwrate) < (r * MIN_PLL_VCO_RATE)) || |
| ((r * MAX_PLL_VCO_RATE) < (2 * hwrate))) |
| continue; |
| (void)do_div(hwrate, r); |
| if (rate < hwrate) { |
| if (pll_freq == 0) |
| pll_freq = (((u32)d << PRCM_PLL_FREQ_D_SHIFT) | |
| (r << PRCM_PLL_FREQ_R_SHIFT)); |
| break; |
| } |
| if ((rate - hwrate) < rem) { |
| rem = (rate - hwrate); |
| pll_freq = (((u32)d << PRCM_PLL_FREQ_D_SHIFT) | |
| (r << PRCM_PLL_FREQ_R_SHIFT)); |
| } |
| } |
| if (pll_freq == 0) |
| return -EINVAL; |
| |
| pll_freq |= (1 << PRCM_PLL_FREQ_N_SHIFT); |
| writel(pll_freq, PRCM_PLLDSI_FREQ); |
| |
| return 0; |
| } |
| |
| static void set_dsiclk_rate(u8 n, unsigned long rate) |
| { |
| u32 val; |
| u32 div; |
| |
| div = clock_divider(pll_rate(PRCM_PLLDSI_FREQ, |
| clock_rate(PRCMU_HDMICLK), PLL_RAW), rate); |
| |
| dsiclk[n].divsel = (div == 1) ? PRCM_DSI_PLLOUT_SEL_PHI : |
| (div == 2) ? PRCM_DSI_PLLOUT_SEL_PHI_2 : |
| /* else */ PRCM_DSI_PLLOUT_SEL_PHI_4; |
| |
| val = readl(PRCM_DSI_PLLOUT_SEL); |
| val &= ~dsiclk[n].divsel_mask; |
| val |= (dsiclk[n].divsel << dsiclk[n].divsel_shift); |
| writel(val, PRCM_DSI_PLLOUT_SEL); |
| } |
| |
| static void set_dsiescclk_rate(u8 n, unsigned long rate) |
| { |
| u32 val; |
| u32 div; |
| |
| div = clock_divider(clock_rate(PRCMU_TVCLK), rate); |
| val = readl(PRCM_DSITVCLK_DIV); |
| val &= ~dsiescclk[n].div_mask; |
| val |= (min(div, (u32)255) << dsiescclk[n].div_shift); |
| writel(val, PRCM_DSITVCLK_DIV); |
| } |
| |
| int prcmu_set_clock_rate(u8 clock, unsigned long rate) |
| { |
| if (clock < PRCMU_NUM_REG_CLOCKS) |
| set_clock_rate(clock, rate); |
| else if (clock == PRCMU_ARMSS) |
| return set_armss_rate(rate); |
| else if (clock == PRCMU_PLLDSI) |
| return set_plldsi_rate(rate); |
| else if ((clock == PRCMU_DSI0CLK) || (clock == PRCMU_DSI1CLK)) |
| set_dsiclk_rate((clock - PRCMU_DSI0CLK), rate); |
| else if ((PRCMU_DSI0ESCCLK <= clock) && (clock <= PRCMU_DSI2ESCCLK)) |
| set_dsiescclk_rate((clock - PRCMU_DSI0ESCCLK), rate); |
| return 0; |
| } |
| |
| int db8500_prcmu_config_esram0_deep_sleep(u8 state) |
| { |
| if ((state > ESRAM0_DEEP_SLEEP_STATE_RET) || |
| (state < ESRAM0_DEEP_SLEEP_STATE_OFF)) |
| return -EINVAL; |
| |
| mutex_lock(&mb4_transfer.lock); |
| |
| while (readl(PRCM_MBOX_CPU_VAL) & MBOX_BIT(4)) |
| cpu_relax(); |
| |
| writeb(MB4H_MEM_ST, (tcdm_base + PRCM_MBOX_HEADER_REQ_MB4)); |
| writeb(((DDR_PWR_STATE_OFFHIGHLAT << 4) | DDR_PWR_STATE_ON), |
| (tcdm_base + PRCM_REQ_MB4_DDR_ST_AP_SLEEP_IDLE)); |
| writeb(DDR_PWR_STATE_ON, |
| (tcdm_base + PRCM_REQ_MB4_DDR_ST_AP_DEEP_IDLE)); |
| writeb(state, (tcdm_base + PRCM_REQ_MB4_ESRAM0_ST)); |
| |
| writel(MBOX_BIT(4), PRCM_MBOX_CPU_SET); |
| wait_for_completion(&mb4_transfer.work); |
| |
| mutex_unlock(&mb4_transfer.lock); |
| |
| return 0; |
| } |
| |
| int db8500_prcmu_config_hotdog(u8 threshold) |
| { |
| mutex_lock(&mb4_transfer.lock); |
| |
| while (readl(PRCM_MBOX_CPU_VAL) & MBOX_BIT(4)) |
| cpu_relax(); |
| |
| writeb(threshold, (tcdm_base + PRCM_REQ_MB4_HOTDOG_THRESHOLD)); |
| writeb(MB4H_HOTDOG, (tcdm_base + PRCM_MBOX_HEADER_REQ_MB4)); |
| |
| writel(MBOX_BIT(4), PRCM_MBOX_CPU_SET); |
| wait_for_completion(&mb4_transfer.work); |
| |
| mutex_unlock(&mb4_transfer.lock); |
| |
| return 0; |
| } |
| |
| int db8500_prcmu_config_hotmon(u8 low, u8 high) |
| { |
| mutex_lock(&mb4_transfer.lock); |
| |
| while (readl(PRCM_MBOX_CPU_VAL) & MBOX_BIT(4)) |
| cpu_relax(); |
| |
| writeb(low, (tcdm_base + PRCM_REQ_MB4_HOTMON_LOW)); |
| writeb(high, (tcdm_base + PRCM_REQ_MB4_HOTMON_HIGH)); |
| writeb((HOTMON_CONFIG_LOW | HOTMON_CONFIG_HIGH), |
| (tcdm_base + PRCM_REQ_MB4_HOTMON_CONFIG)); |
| writeb(MB4H_HOTMON, (tcdm_base + PRCM_MBOX_HEADER_REQ_MB4)); |
| |
| writel(MBOX_BIT(4), PRCM_MBOX_CPU_SET); |
| wait_for_completion(&mb4_transfer.work); |
| |
| mutex_unlock(&mb4_transfer.lock); |
| |
| return 0; |
| } |
| |
| static int config_hot_period(u16 val) |
| { |
| mutex_lock(&mb4_transfer.lock); |
| |
| while (readl(PRCM_MBOX_CPU_VAL) & MBOX_BIT(4)) |
| cpu_relax(); |
| |
| writew(val, (tcdm_base + PRCM_REQ_MB4_HOT_PERIOD)); |
| writeb(MB4H_HOT_PERIOD, (tcdm_base + PRCM_MBOX_HEADER_REQ_MB4)); |
| |
| writel(MBOX_BIT(4), PRCM_MBOX_CPU_SET); |
| wait_for_completion(&mb4_transfer.work); |
| |
| mutex_unlock(&mb4_transfer.lock); |
| |
| return 0; |
| } |
| |
| int db8500_prcmu_start_temp_sense(u16 cycles32k) |
| { |
| if (cycles32k == 0xFFFF) |
| return -EINVAL; |
| |
| return config_hot_period(cycles32k); |
| } |
| |
| int db8500_prcmu_stop_temp_sense(void) |
| { |
| return config_hot_period(0xFFFF); |
| } |
| |
| static int prcmu_a9wdog(u8 cmd, u8 d0, u8 d1, u8 d2, u8 d3) |
| { |
| |
| mutex_lock(&mb4_transfer.lock); |
| |
| while (readl(PRCM_MBOX_CPU_VAL) & MBOX_BIT(4)) |
| cpu_relax(); |
| |
| writeb(d0, (tcdm_base + PRCM_REQ_MB4_A9WDOG_0)); |
| writeb(d1, (tcdm_base + PRCM_REQ_MB4_A9WDOG_1)); |
| writeb(d2, (tcdm_base + PRCM_REQ_MB4_A9WDOG_2)); |
| writeb(d3, (tcdm_base + PRCM_REQ_MB4_A9WDOG_3)); |
| |
| writeb(cmd, (tcdm_base + PRCM_MBOX_HEADER_REQ_MB4)); |
| |
| writel(MBOX_BIT(4), PRCM_MBOX_CPU_SET); |
| wait_for_completion(&mb4_transfer.work); |
| |
| mutex_unlock(&mb4_transfer.lock); |
| |
| return 0; |
| |
| } |
| |
| int db8500_prcmu_config_a9wdog(u8 num, bool sleep_auto_off) |
| { |
| BUG_ON(num == 0 || num > 0xf); |
| return prcmu_a9wdog(MB4H_A9WDOG_CONF, num, 0, 0, |
| sleep_auto_off ? A9WDOG_AUTO_OFF_EN : |
| A9WDOG_AUTO_OFF_DIS); |
| } |
| EXPORT_SYMBOL(db8500_prcmu_config_a9wdog); |
| |
| int db8500_prcmu_enable_a9wdog(u8 id) |
| { |
| return prcmu_a9wdog(MB4H_A9WDOG_EN, id, 0, 0, 0); |
| } |
| EXPORT_SYMBOL(db8500_prcmu_enable_a9wdog); |
| |
| int db8500_prcmu_disable_a9wdog(u8 id) |
| { |
| return prcmu_a9wdog(MB4H_A9WDOG_DIS, id, 0, 0, 0); |
| } |
| EXPORT_SYMBOL(db8500_prcmu_disable_a9wdog); |
| |
| int db8500_prcmu_kick_a9wdog(u8 id) |
| { |
| return prcmu_a9wdog(MB4H_A9WDOG_KICK, id, 0, 0, 0); |
| } |
| EXPORT_SYMBOL(db8500_prcmu_kick_a9wdog); |
| |
| /* |
| * timeout is 28 bit, in ms. |
| */ |
| int db8500_prcmu_load_a9wdog(u8 id, u32 timeout) |
| { |
| return prcmu_a9wdog(MB4H_A9WDOG_LOAD, |
| (id & A9WDOG_ID_MASK) | |
| /* |
| * Put the lowest 28 bits of timeout at |
| * offset 4. Four first bits are used for id. |
| */ |
| (u8)((timeout << 4) & 0xf0), |
| (u8)((timeout >> 4) & 0xff), |
| (u8)((timeout >> 12) & 0xff), |
| (u8)((timeout >> 20) & 0xff)); |
| } |
| EXPORT_SYMBOL(db8500_prcmu_load_a9wdog); |
| |
| /** |
| * prcmu_abb_read() - Read register value(s) from the ABB. |
| * @slave: The I2C slave address. |
| * @reg: The (start) register address. |
| * @value: The read out value(s). |
| * @size: The number of registers to read. |
| * |
| * Reads register value(s) from the ABB. |
| * @size has to be 1 for the current firmware version. |
| */ |
| int prcmu_abb_read(u8 slave, u8 reg, u8 *value, u8 size) |
| { |
| int r; |
| |
| if (size != 1) |
| return -EINVAL; |
| |
| mutex_lock(&mb5_transfer.lock); |
| |
| while (readl(PRCM_MBOX_CPU_VAL) & MBOX_BIT(5)) |
| cpu_relax(); |
| |
| writeb(0, (tcdm_base + PRCM_MBOX_HEADER_REQ_MB5)); |
| writeb(PRCMU_I2C_READ(slave), (tcdm_base + PRCM_REQ_MB5_I2C_SLAVE_OP)); |
| writeb(PRCMU_I2C_STOP_EN, (tcdm_base + PRCM_REQ_MB5_I2C_HW_BITS)); |
| writeb(reg, (tcdm_base + PRCM_REQ_MB5_I2C_REG)); |
| writeb(0, (tcdm_base + PRCM_REQ_MB5_I2C_VAL)); |
| |
| writel(MBOX_BIT(5), PRCM_MBOX_CPU_SET); |
| |
| if (!wait_for_completion_timeout(&mb5_transfer.work, |
| msecs_to_jiffies(20000))) { |
| pr_err("prcmu: %s timed out (20 s) waiting for a reply.\n", |
| __func__); |
| r = -EIO; |
| } else { |
| r = ((mb5_transfer.ack.status == I2C_RD_OK) ? 0 : -EIO); |
| } |
| |
| if (!r) |
| *value = mb5_transfer.ack.value; |
| |
| mutex_unlock(&mb5_transfer.lock); |
| |
| return r; |
| } |
| |
| /** |
| * prcmu_abb_write_masked() - Write masked register value(s) to the ABB. |
| * @slave: The I2C slave address. |
| * @reg: The (start) register address. |
| * @value: The value(s) to write. |
| * @mask: The mask(s) to use. |
| * @size: The number of registers to write. |
| * |
| * Writes masked register value(s) to the ABB. |
| * For each @value, only the bits set to 1 in the corresponding @mask |
| * will be written. The other bits are not changed. |
| * @size has to be 1 for the current firmware version. |
| */ |
| int prcmu_abb_write_masked(u8 slave, u8 reg, u8 *value, u8 *mask, u8 size) |
| { |
| int r; |
| |
| if (size != 1) |
| return -EINVAL; |
| |
| mutex_lock(&mb5_transfer.lock); |
| |
| while (readl(PRCM_MBOX_CPU_VAL) & MBOX_BIT(5)) |
| cpu_relax(); |
| |
| writeb(~*mask, (tcdm_base + PRCM_MBOX_HEADER_REQ_MB5)); |
| writeb(PRCMU_I2C_WRITE(slave), (tcdm_base + PRCM_REQ_MB5_I2C_SLAVE_OP)); |
| writeb(PRCMU_I2C_STOP_EN, (tcdm_base + PRCM_REQ_MB5_I2C_HW_BITS)); |
| writeb(reg, (tcdm_base + PRCM_REQ_MB5_I2C_REG)); |
| writeb(*value, (tcdm_base + PRCM_REQ_MB5_I2C_VAL)); |
| |
| writel(MBOX_BIT(5), PRCM_MBOX_CPU_SET); |
| |
| if (!wait_for_completion_timeout(&mb5_transfer.work, |
| msecs_to_jiffies(20000))) { |
| pr_err("prcmu: %s timed out (20 s) waiting for a reply.\n", |
| __func__); |
| r = -EIO; |
| } else { |
| r = ((mb5_transfer.ack.status == I2C_WR_OK) ? 0 : -EIO); |
| } |
| |
| mutex_unlock(&mb5_transfer.lock); |
| |
| return r; |
| } |
| |
| /** |
| * prcmu_abb_write() - Write register value(s) to the ABB. |
| * @slave: The I2C slave address. |
| * @reg: The (start) register address. |
| * @value: The value(s) to write. |
| * @size: The number of registers to write. |
| * |
| * Writes register value(s) to the ABB. |
| * @size has to be 1 for the current firmware version. |
| */ |
| int prcmu_abb_write(u8 slave, u8 reg, u8 *value, u8 size) |
| { |
| u8 mask = ~0; |
| |
| return prcmu_abb_write_masked(slave, reg, value, &mask, size); |
| } |
| |
| /** |
| * prcmu_ac_wake_req - should be called whenever ARM wants to wakeup Modem |
| */ |
| int prcmu_ac_wake_req(void) |
| { |
| u32 val; |
| int ret = 0; |
| |
| mutex_lock(&mb0_transfer.ac_wake_lock); |
| |
| val = readl(PRCM_HOSTACCESS_REQ); |
| if (val & PRCM_HOSTACCESS_REQ_HOSTACCESS_REQ) |
| goto unlock_and_return; |
| |
| atomic_set(&ac_wake_req_state, 1); |
| |
| /* |
| * Force Modem Wake-up before hostaccess_req ping-pong. |
| * It prevents Modem to enter in Sleep while acking the hostaccess |
| * request. The 31us delay has been calculated by HWI. |
| */ |
| val |= PRCM_HOSTACCESS_REQ_WAKE_REQ; |
| writel(val, PRCM_HOSTACCESS_REQ); |
| |
| udelay(31); |
| |
| val |= PRCM_HOSTACCESS_REQ_HOSTACCESS_REQ; |
| writel(val, PRCM_HOSTACCESS_REQ); |
| |
| if (!wait_for_completion_timeout(&mb0_transfer.ac_wake_work, |
| msecs_to_jiffies(5000))) { |
| pr_crit("prcmu: %s timed out (5 s) waiting for a reply.\n", |
| __func__); |
| ret = -EFAULT; |
| } |
| |
| unlock_and_return: |
| mutex_unlock(&mb0_transfer.ac_wake_lock); |
| return ret; |
| } |
| |
| /** |
| * prcmu_ac_sleep_req - called when ARM no longer needs to talk to modem |
| */ |
| void prcmu_ac_sleep_req(void) |
| { |
| u32 val; |
| |
| mutex_lock(&mb0_transfer.ac_wake_lock); |
| |
| val = readl(PRCM_HOSTACCESS_REQ); |
| if (!(val & PRCM_HOSTACCESS_REQ_HOSTACCESS_REQ)) |
| goto unlock_and_return; |
| |
| writel((val & ~PRCM_HOSTACCESS_REQ_HOSTACCESS_REQ), |
| PRCM_HOSTACCESS_REQ); |
| |
| if (!wait_for_completion_timeout(&mb0_transfer.ac_wake_work, |
| msecs_to_jiffies(5000))) { |
| pr_crit("prcmu: %s timed out (5 s) waiting for a reply.\n", |
| __func__); |
| } |
| |
| atomic_set(&ac_wake_req_state, 0); |
| |
| unlock_and_return: |
| mutex_unlock(&mb0_transfer.ac_wake_lock); |
| } |
| |
| bool db8500_prcmu_is_ac_wake_requested(void) |
| { |
| return (atomic_read(&ac_wake_req_state) != 0); |
| } |
| |
| /** |
| * db8500_prcmu_system_reset - System reset |
| * |
| * Saves the reset reason code and then sets the APE_SOFTRST register which |
| * fires interrupt to fw |
| */ |
| void db8500_prcmu_system_reset(u16 reset_code) |
| { |
| writew(reset_code, (tcdm_base + PRCM_SW_RST_REASON)); |
| writel(1, PRCM_APE_SOFTRST); |
| } |
| |
| /** |
| * db8500_prcmu_get_reset_code - Retrieve SW reset reason code |
| * |
| * Retrieves the reset reason code stored by prcmu_system_reset() before |
| * last restart. |
| */ |
| u16 db8500_prcmu_get_reset_code(void) |
| { |
| return readw(tcdm_base + PRCM_SW_RST_REASON); |
| } |
| |
| /** |
| * db8500_prcmu_reset_modem - ask the PRCMU to reset modem |
| */ |
| void db8500_prcmu_modem_reset(void) |
| { |
| mutex_lock(&mb1_transfer.lock); |
| |
| while (readl(PRCM_MBOX_CPU_VAL) & MBOX_BIT(1)) |
| cpu_relax(); |
| |
| writeb(MB1H_RESET_MODEM, (tcdm_base + PRCM_MBOX_HEADER_REQ_MB1)); |
| writel(MBOX_BIT(1), PRCM_MBOX_CPU_SET); |
| wait_for_completion(&mb1_transfer.work); |
| |
| /* |
| * No need to check return from PRCMU as modem should go in reset state |
| * This state is already managed by upper layer |
| */ |
| |
| mutex_unlock(&mb1_transfer.lock); |
| } |
| |
| static void ack_dbb_wakeup(void) |
| { |
| unsigned long flags; |
| |
| spin_lock_irqsave(&mb0_transfer.lock, flags); |
| |
| while (readl(PRCM_MBOX_CPU_VAL) & MBOX_BIT(0)) |
| cpu_relax(); |
| |
| writeb(MB0H_READ_WAKEUP_ACK, (tcdm_base + PRCM_MBOX_HEADER_REQ_MB0)); |
| writel(MBOX_BIT(0), PRCM_MBOX_CPU_SET); |
| |
| spin_unlock_irqrestore(&mb0_transfer.lock, flags); |
| } |
| |
| static inline void print_unknown_header_warning(u8 n, u8 header) |
| { |
| pr_warning("prcmu: Unknown message header (%d) in mailbox %d.\n", |
| header, n); |
| } |
| |
| static bool read_mailbox_0(void) |
| { |
| bool r; |
| u32 ev; |
| unsigned int n; |
| u8 header; |
| |
| header = readb(tcdm_base + PRCM_MBOX_HEADER_ACK_MB0); |
| switch (header) { |
| case MB0H_WAKEUP_EXE: |
| case MB0H_WAKEUP_SLEEP: |
| if (readb(tcdm_base + PRCM_ACK_MB0_READ_POINTER) & 1) |
| ev = readl(tcdm_base + PRCM_ACK_MB0_WAKEUP_1_8500); |
| else |
| ev = readl(tcdm_base + PRCM_ACK_MB0_WAKEUP_0_8500); |
| |
| if (ev & (WAKEUP_BIT_AC_WAKE_ACK | WAKEUP_BIT_AC_SLEEP_ACK)) |
| complete(&mb0_transfer.ac_wake_work); |
| if (ev & WAKEUP_BIT_SYSCLK_OK) |
| complete(&mb3_transfer.sysclk_work); |
| |
| ev &= mb0_transfer.req.dbb_irqs; |
| |
| for (n = 0; n < NUM_PRCMU_WAKEUPS; n++) { |
| if (ev & prcmu_irq_bit[n]) |
| generic_handle_irq(irq_find_mapping(db8500_irq_domain, n)); |
| } |
| r = true; |
| break; |
| default: |
| print_unknown_header_warning(0, header); |
| r = false; |
| break; |
| } |
| writel(MBOX_BIT(0), PRCM_ARM_IT1_CLR); |
| return r; |
| } |
| |
| static bool read_mailbox_1(void) |
| { |
| mb1_transfer.ack.header = readb(tcdm_base + PRCM_MBOX_HEADER_REQ_MB1); |
| mb1_transfer.ack.arm_opp = readb(tcdm_base + |
| PRCM_ACK_MB1_CURRENT_ARM_OPP); |
| mb1_transfer.ack.ape_opp = readb(tcdm_base + |
| PRCM_ACK_MB1_CURRENT_APE_OPP); |
| mb1_transfer.ack.ape_voltage_status = readb(tcdm_base + |
| PRCM_ACK_MB1_APE_VOLTAGE_STATUS); |
| writel(MBOX_BIT(1), PRCM_ARM_IT1_CLR); |
| complete(&mb1_transfer.work); |
| return false; |
| } |
| |
| static bool read_mailbox_2(void) |
| { |
| mb2_transfer.ack.status = readb(tcdm_base + PRCM_ACK_MB2_DPS_STATUS); |
| writel(MBOX_BIT(2), PRCM_ARM_IT1_CLR); |
| complete(&mb2_transfer.work); |
| return false; |
| } |
| |
| static bool read_mailbox_3(void) |
| { |
| writel(MBOX_BIT(3), PRCM_ARM_IT1_CLR); |
| return false; |
| } |
| |
| static bool read_mailbox_4(void) |
| { |
| u8 header; |
| bool do_complete = true; |
| |
| header = readb(tcdm_base + PRCM_MBOX_HEADER_REQ_MB4); |
| switch (header) { |
| case MB4H_MEM_ST: |
| case MB4H_HOTDOG: |
| case MB4H_HOTMON: |
| case MB4H_HOT_PERIOD: |
| case MB4H_A9WDOG_CONF: |
| case MB4H_A9WDOG_EN: |
| case MB4H_A9WDOG_DIS: |
| case MB4H_A9WDOG_LOAD: |
| case MB4H_A9WDOG_KICK: |
| break; |
| default: |
| print_unknown_header_warning(4, header); |
| do_complete = false; |
| break; |
| } |
| |
| writel(MBOX_BIT(4), PRCM_ARM_IT1_CLR); |
| |
| if (do_complete) |
| complete(&mb4_transfer.work); |
| |
| return false; |
| } |
| |
| static bool read_mailbox_5(void) |
| { |
| mb5_transfer.ack.status = readb(tcdm_base + PRCM_ACK_MB5_I2C_STATUS); |
| mb5_transfer.ack.value = readb(tcdm_base + PRCM_ACK_MB5_I2C_VAL); |
| writel(MBOX_BIT(5), PRCM_ARM_IT1_CLR); |
| complete(&mb5_transfer.work); |
| return false; |
| } |
| |
| static bool read_mailbox_6(void) |
| { |
| writel(MBOX_BIT(6), PRCM_ARM_IT1_CLR); |
| return false; |
| } |
| |
| static bool read_mailbox_7(void) |
| { |
| writel(MBOX_BIT(7), PRCM_ARM_IT1_CLR); |
| return false; |
| } |
| |
| static bool (* const read_mailbox[NUM_MB])(void) = { |
| read_mailbox_0, |
| read_mailbox_1, |
| read_mailbox_2, |
| read_mailbox_3, |
| read_mailbox_4, |
| read_mailbox_5, |
| read_mailbox_6, |
| read_mailbox_7 |
| }; |
| |
| static irqreturn_t prcmu_irq_handler(int irq, void *data) |
| { |
| u32 bits; |
| u8 n; |
| irqreturn_t r; |
| |
| bits = (readl(PRCM_ARM_IT1_VAL) & ALL_MBOX_BITS); |
| if (unlikely(!bits)) |
| return IRQ_NONE; |
| |
| r = IRQ_HANDLED; |
| for (n = 0; bits; n++) { |
| if (bits & MBOX_BIT(n)) { |
| bits -= MBOX_BIT(n); |
| if (read_mailbox[n]()) |
| r = IRQ_WAKE_THREAD; |
| } |
| } |
| return r; |
| } |
| |
| static irqreturn_t prcmu_irq_thread_fn(int irq, void *data) |
| { |
| ack_dbb_wakeup(); |
| return IRQ_HANDLED; |
| } |
| |
| static void prcmu_mask_work(struct work_struct *work) |
| { |
| unsigned long flags; |
| |
| spin_lock_irqsave(&mb0_transfer.lock, flags); |
| |
| config_wakeups(); |
| |
| spin_unlock_irqrestore(&mb0_transfer.lock, flags); |
| } |
| |
| static void prcmu_irq_mask(struct irq_data *d) |
| { |
| unsigned long flags; |
| |
| spin_lock_irqsave(&mb0_transfer.dbb_irqs_lock, flags); |
| |
| mb0_transfer.req.dbb_irqs &= ~prcmu_irq_bit[d->hwirq]; |
| |
| spin_unlock_irqrestore(&mb0_transfer.dbb_irqs_lock, flags); |
| |
| if (d->irq != IRQ_PRCMU_CA_SLEEP) |
| schedule_work(&mb0_transfer.mask_work); |
| } |
| |
| static void prcmu_irq_unmask(struct irq_data *d) |
| { |
| unsigned long flags; |
| |
| spin_lock_irqsave(&mb0_transfer.dbb_irqs_lock, flags); |
| |
| mb0_transfer.req.dbb_irqs |= prcmu_irq_bit[d->hwirq]; |
| |
| spin_unlock_irqrestore(&mb0_transfer.dbb_irqs_lock, flags); |
| |
| if (d->irq != IRQ_PRCMU_CA_SLEEP) |
| schedule_work(&mb0_transfer.mask_work); |
| } |
| |
| static void noop(struct irq_data *d) |
| { |
| } |
| |
| static struct irq_chip prcmu_irq_chip = { |
| .name = "prcmu", |
| .irq_disable = prcmu_irq_mask, |
| .irq_ack = noop, |
| .irq_mask = prcmu_irq_mask, |
| .irq_unmask = prcmu_irq_unmask, |
| }; |
| |
| static __init char *fw_project_name(u32 project) |
| { |
| switch (project) { |
| case PRCMU_FW_PROJECT_U8500: |
| return "U8500"; |
| case PRCMU_FW_PROJECT_U8400: |
| return "U8400"; |
| case PRCMU_FW_PROJECT_U9500: |
| return "U9500"; |
| case PRCMU_FW_PROJECT_U8500_MBB: |
| return "U8500 MBB"; |
| case PRCMU_FW_PROJECT_U8500_C1: |
| return "U8500 C1"; |
| case PRCMU_FW_PROJECT_U8500_C2: |
| return "U8500 C2"; |
| case PRCMU_FW_PROJECT_U8500_C3: |
| return "U8500 C3"; |
| case PRCMU_FW_PROJECT_U8500_C4: |
| return "U8500 C4"; |
| case PRCMU_FW_PROJECT_U9500_MBL: |
| return "U9500 MBL"; |
| case PRCMU_FW_PROJECT_U8500_MBL: |
| return "U8500 MBL"; |
| case PRCMU_FW_PROJECT_U8500_MBL2: |
| return "U8500 MBL2"; |
| case PRCMU_FW_PROJECT_U8520: |
| return "U8520 MBL"; |
| case PRCMU_FW_PROJECT_U8420: |
| return "U8420"; |
| case PRCMU_FW_PROJECT_U9540: |
| return "U9540"; |
| case PRCMU_FW_PROJECT_A9420: |
| return "A9420"; |
| case PRCMU_FW_PROJECT_L8540: |
| return "L8540"; |
| case PRCMU_FW_PROJECT_L8580: |
| return "L8580"; |
| default: |
| return "Unknown"; |
| } |
| } |
| |
| static int db8500_irq_map(struct irq_domain *d, unsigned int virq, |
| irq_hw_number_t hwirq) |
| { |
| irq_set_chip_and_handler(virq, &prcmu_irq_chip, |
| handle_simple_irq); |
| set_irq_flags(virq, IRQF_VALID); |
| |
| return 0; |
| } |
| |
| static struct irq_domain_ops db8500_irq_ops = { |
| .map = db8500_irq_map, |
| .xlate = irq_domain_xlate_twocell, |
| }; |
| |
| static int db8500_irq_init(struct device_node *np) |
| { |
| int i; |
| |
| db8500_irq_domain = irq_domain_add_simple( |
| np, NUM_PRCMU_WAKEUPS, 0, |
| &db8500_irq_ops, NULL); |
| |
| if (!db8500_irq_domain) { |
| pr_err("Failed to create irqdomain\n"); |
| return -ENOSYS; |
| } |
| |
| /* All wakeups will be used, so create mappings for all */ |
| for (i = 0; i < NUM_PRCMU_WAKEUPS; i++) |
| irq_create_mapping(db8500_irq_domain, i); |
| |
| return 0; |
| } |
| |
| static void dbx500_fw_version_init(struct platform_device *pdev, |
| u32 version_offset) |
| { |
| struct resource *res; |
| void __iomem *tcpm_base; |
| u32 version; |
| |
| res = platform_get_resource_byname(pdev, IORESOURCE_MEM, |
| "prcmu-tcpm"); |
| if (!res) { |
| dev_err(&pdev->dev, |
| "Error: no prcmu tcpm memory region provided\n"); |
| return; |
| } |
| tcpm_base = ioremap(res->start, resource_size(res)); |
| if (!tcpm_base) { |
| dev_err(&pdev->dev, "no prcmu tcpm mem region provided\n"); |
| return; |
| } |
| |
| version = readl(tcpm_base + version_offset); |
| fw_info.version.project = (version & 0xFF); |
| fw_info.version.api_version = (version >> 8) & 0xFF; |
| fw_info.version.func_version = (version >> 16) & 0xFF; |
| fw_info.version.errata = (version >> 24) & 0xFF; |
| strncpy(fw_info.version.project_name, |
| fw_project_name(fw_info.version.project), |
| PRCMU_FW_PROJECT_NAME_LEN); |
| fw_info.valid = true; |
| pr_info("PRCMU firmware: %s(%d), version %d.%d.%d\n", |
| fw_info.version.project_name, |
| fw_info.version.project, |
| fw_info.version.api_version, |
| fw_info.version.func_version, |
| fw_info.version.errata); |
| iounmap(tcpm_base); |
| } |
| |
| void __init db8500_prcmu_early_init(u32 phy_base, u32 size) |
| { |
| /* |
| * This is a temporary remap to bring up the clocks. It is |
| * subsequently replaces with a real remap. After the merge of |
| * the mailbox subsystem all of this early code goes away, and the |
| * clock driver can probe independently. An early initcall will |
| * still be needed, but it can be diverted into drivers/clk/ux500. |
| */ |
| prcmu_base = ioremap(phy_base, size); |
| if (!prcmu_base) |
| pr_err("%s: ioremap() of prcmu registers failed!\n", __func__); |
| |
| spin_lock_init(&mb0_transfer.lock); |
| spin_lock_init(&mb0_transfer.dbb_irqs_lock); |
| mutex_init(&mb0_transfer.ac_wake_lock); |
| init_completion(&mb0_transfer.ac_wake_work); |
| mutex_init(&mb1_transfer.lock); |
| init_completion(&mb1_transfer.work); |
| mb1_transfer.ape_opp = APE_NO_CHANGE; |
| mutex_init(&mb2_transfer.lock); |
| init_completion(&mb2_transfer.work); |
| spin_lock_init(&mb2_transfer.auto_pm_lock); |
| spin_lock_init(&mb3_transfer.lock); |
| mutex_init(&mb3_transfer.sysclk_lock); |
| init_completion(&mb3_transfer.sysclk_work); |
| mutex_init(&mb4_transfer.lock); |
| init_completion(&mb4_transfer.work); |
| mutex_init(&mb5_transfer.lock); |
| init_completion(&mb5_transfer.work); |
| |
| INIT_WORK(&mb0_transfer.mask_work, prcmu_mask_work); |
| } |
| |
| static void __init init_prcm_registers(void) |
| { |
| u32 val; |
| |
| val = readl(PRCM_A9PL_FORCE_CLKEN); |
| val &= ~(PRCM_A9PL_FORCE_CLKEN_PRCM_A9PL_FORCE_CLKEN | |
| PRCM_A9PL_FORCE_CLKEN_PRCM_A9AXI_FORCE_CLKEN); |
| writel(val, (PRCM_A9PL_FORCE_CLKEN)); |
| } |
| |
| /* |
| * Power domain switches (ePODs) modeled as regulators for the DB8500 SoC |
| */ |
| static struct regulator_consumer_supply db8500_vape_consumers[] = { |
| REGULATOR_SUPPLY("v-ape", NULL), |
| REGULATOR_SUPPLY("v-i2c", "nmk-i2c.0"), |
| REGULATOR_SUPPLY("v-i2c", "nmk-i2c.1"), |
| REGULATOR_SUPPLY("v-i2c", "nmk-i2c.2"), |
| REGULATOR_SUPPLY("v-i2c", "nmk-i2c.3"), |
| REGULATOR_SUPPLY("v-i2c", "nmk-i2c.4"), |
| /* "v-mmc" changed to "vcore" in the mainline kernel */ |
| REGULATOR_SUPPLY("vcore", "sdi0"), |
| REGULATOR_SUPPLY("vcore", "sdi1"), |
| REGULATOR_SUPPLY("vcore", "sdi2"), |
| REGULATOR_SUPPLY("vcore", "sdi3"), |
| REGULATOR_SUPPLY("vcore", "sdi4"), |
| REGULATOR_SUPPLY("v-dma", "dma40.0"), |
| REGULATOR_SUPPLY("v-ape", "ab8500-usb.0"), |
| /* "v-uart" changed to "vcore" in the mainline kernel */ |
| REGULATOR_SUPPLY("vcore", "uart0"), |
| REGULATOR_SUPPLY("vcore", "uart1"), |
| REGULATOR_SUPPLY("vcore", "uart2"), |
| REGULATOR_SUPPLY("v-ape", "nmk-ske-keypad.0"), |
| REGULATOR_SUPPLY("v-hsi", "ste_hsi.0"), |
| REGULATOR_SUPPLY("vddvario", "smsc911x.0"), |
| }; |
| |
| static struct regulator_consumer_supply db8500_vsmps2_consumers[] = { |
| REGULATOR_SUPPLY("musb_1v8", "ab8500-usb.0"), |
| /* AV8100 regulator */ |
| REGULATOR_SUPPLY("hdmi_1v8", "0-0070"), |
| }; |
| |
| static struct regulator_consumer_supply db8500_b2r2_mcde_consumers[] = { |
| REGULATOR_SUPPLY("vsupply", "b2r2_bus"), |
| REGULATOR_SUPPLY("vsupply", "mcde"), |
| }; |
| |
| /* SVA MMDSP regulator switch */ |
| static struct regulator_consumer_supply db8500_svammdsp_consumers[] = { |
| REGULATOR_SUPPLY("sva-mmdsp", "cm_control"), |
| }; |
| |
| /* SVA pipe regulator switch */ |
| static struct regulator_consumer_supply db8500_svapipe_consumers[] = { |
| REGULATOR_SUPPLY("sva-pipe", "cm_control"), |
| }; |
| |
| /* SIA MMDSP regulator switch */ |
| static struct regulator_consumer_supply db8500_siammdsp_consumers[] = { |
| REGULATOR_SUPPLY("sia-mmdsp", "cm_control"), |
| }; |
| |
| /* SIA pipe regulator switch */ |
| static struct regulator_consumer_supply db8500_siapipe_consumers[] = { |
| REGULATOR_SUPPLY("sia-pipe", "cm_control"), |
| }; |
| |
| static struct regulator_consumer_supply db8500_sga_consumers[] = { |
| REGULATOR_SUPPLY("v-mali", NULL), |
| }; |
| |
| /* ESRAM1 and 2 regulator switch */ |
| static struct regulator_consumer_supply db8500_esram12_consumers[] = { |
| REGULATOR_SUPPLY("esram12", "cm_control"), |
| }; |
| |
| /* ESRAM3 and 4 regulator switch */ |
| static struct regulator_consumer_supply db8500_esram34_consumers[] = { |
| REGULATOR_SUPPLY("v-esram34", "mcde"), |
| REGULATOR_SUPPLY("esram34", "cm_control"), |
| REGULATOR_SUPPLY("lcla_esram", "dma40.0"), |
| }; |
| |
| static struct regulator_init_data db8500_regulators[DB8500_NUM_REGULATORS] = { |
| [DB8500_REGULATOR_VAPE] = { |
| .constraints = { |
| .name = "db8500-vape", |
| .valid_ops_mask = REGULATOR_CHANGE_STATUS, |
| .always_on = true, |
| }, |
| .consumer_supplies = db8500_vape_consumers, |
| .num_consumer_supplies = ARRAY_SIZE(db8500_vape_consumers), |
| }, |
| [DB8500_REGULATOR_VARM] = { |
| .constraints = { |
| .name = "db8500-varm", |
| .valid_ops_mask = REGULATOR_CHANGE_STATUS, |
| }, |
| }, |
| [DB8500_REGULATOR_VMODEM] = { |
| .constraints = { |
| .name = "db8500-vmodem", |
| .valid_ops_mask = REGULATOR_CHANGE_STATUS, |
| }, |
| }, |
| [DB8500_REGULATOR_VPLL] = { |
| .constraints = { |
| .name = "db8500-vpll", |
| .valid_ops_mask = REGULATOR_CHANGE_STATUS, |
| }, |
| }, |
| [DB8500_REGULATOR_VSMPS1] = { |
| .constraints = { |
| .name = "db8500-vsmps1", |
| .valid_ops_mask = REGULATOR_CHANGE_STATUS, |
| }, |
| }, |
| [DB8500_REGULATOR_VSMPS2] = { |
| .constraints = { |
| .name = "db8500-vsmps2", |
| .valid_ops_mask = REGULATOR_CHANGE_STATUS, |
| }, |
| .consumer_supplies = db8500_vsmps2_consumers, |
| .num_consumer_supplies = ARRAY_SIZE(db8500_vsmps2_consumers), |
| }, |
| [DB8500_REGULATOR_VSMPS3] = { |
| .constraints = { |
| .name = "db8500-vsmps3", |
| .valid_ops_mask = REGULATOR_CHANGE_STATUS, |
| }, |
| }, |
| [DB8500_REGULATOR_VRF1] = { |
| .constraints = { |
| .name = "db8500-vrf1", |
| .valid_ops_mask = REGULATOR_CHANGE_STATUS, |
| }, |
| }, |
| [DB8500_REGULATOR_SWITCH_SVAMMDSP] = { |
| /* dependency to u8500-vape is handled outside regulator framework */ |
| .constraints = { |
| .name = "db8500-sva-mmdsp", |
| .valid_ops_mask = REGULATOR_CHANGE_STATUS, |
| }, |
| .consumer_supplies = db8500_svammdsp_consumers, |
| .num_consumer_supplies = ARRAY_SIZE(db8500_svammdsp_consumers), |
| }, |
| [DB8500_REGULATOR_SWITCH_SVAMMDSPRET] = { |
| .constraints = { |
| /* "ret" means "retention" */ |
| .name = "db8500-sva-mmdsp-ret", |
| .valid_ops_mask = REGULATOR_CHANGE_STATUS, |
| }, |
| }, |
| [DB8500_REGULATOR_SWITCH_SVAPIPE] = { |
| /* dependency to u8500-vape is handled outside regulator framework */ |
| .constraints = { |
| .name = "db8500-sva-pipe", |
| .valid_ops_mask = REGULATOR_CHANGE_STATUS, |
| }, |
| .consumer_supplies = db8500_svapipe_consumers, |
| .num_consumer_supplies = ARRAY_SIZE(db8500_svapipe_consumers), |
| }, |
| [DB8500_REGULATOR_SWITCH_SIAMMDSP] = { |
| /* dependency to u8500-vape is handled outside regulator framework */ |
| .constraints = { |
| .name = "db8500-sia-mmdsp", |
| .valid_ops_mask = REGULATOR_CHANGE_STATUS, |
| }, |
| .consumer_supplies = db8500_siammdsp_consumers, |
| .num_consumer_supplies = ARRAY_SIZE(db8500_siammdsp_consumers), |
| }, |
| [DB8500_REGULATOR_SWITCH_SIAMMDSPRET] = { |
| .constraints = { |
| .name = "db8500-sia-mmdsp-ret", |
| .valid_ops_mask = REGULATOR_CHANGE_STATUS, |
| }, |
| }, |
| [DB8500_REGULATOR_SWITCH_SIAPIPE] = { |
| /* dependency to u8500-vape is handled outside regulator framework */ |
| .constraints = { |
| .name = "db8500-sia-pipe", |
| .valid_ops_mask = REGULATOR_CHANGE_STATUS, |
| }, |
| .consumer_supplies = db8500_siapipe_consumers, |
| .num_consumer_supplies = ARRAY_SIZE(db8500_siapipe_consumers), |
| }, |
| [DB8500_REGULATOR_SWITCH_SGA] = { |
| .supply_regulator = "db8500-vape", |
| .constraints = { |
| .name = "db8500-sga", |
| .valid_ops_mask = REGULATOR_CHANGE_STATUS, |
| }, |
| .consumer_supplies = db8500_sga_consumers, |
| .num_consumer_supplies = ARRAY_SIZE(db8500_sga_consumers), |
| |
| }, |
| [DB8500_REGULATOR_SWITCH_B2R2_MCDE] = { |
| .supply_regulator = "db8500-vape", |
| .constraints = { |
| .name = "db8500-b2r2-mcde", |
| .valid_ops_mask = REGULATOR_CHANGE_STATUS, |
| }, |
| .consumer_supplies = db8500_b2r2_mcde_consumers, |
| .num_consumer_supplies = ARRAY_SIZE(db8500_b2r2_mcde_consumers), |
| }, |
| [DB8500_REGULATOR_SWITCH_ESRAM12] = { |
| /* |
| * esram12 is set in retention and supplied by Vsafe when Vape is off, |
| * no need to hold Vape |
| */ |
| .constraints = { |
| .name = "db8500-esram12", |
| .valid_ops_mask = REGULATOR_CHANGE_STATUS, |
| }, |
| .consumer_supplies = db8500_esram12_consumers, |
| .num_consumer_supplies = ARRAY_SIZE(db8500_esram12_consumers), |
| }, |
| [DB8500_REGULATOR_SWITCH_ESRAM12RET] = { |
| .constraints = { |
| .name = "db8500-esram12-ret", |
| .valid_ops_mask = REGULATOR_CHANGE_STATUS, |
| }, |
| }, |
| [DB8500_REGULATOR_SWITCH_ESRAM34] = { |
| /* |
| * esram34 is set in retention and supplied by Vsafe when Vape is off, |
| * no need to hold Vape |
| */ |
| .constraints = { |
| .name = "db8500-esram34", |
| .valid_ops_mask = REGULATOR_CHANGE_STATUS, |
| }, |
| .consumer_supplies = db8500_esram34_consumers, |
| .num_consumer_supplies = ARRAY_SIZE(db8500_esram34_consumers), |
| }, |
| [DB8500_REGULATOR_SWITCH_ESRAM34RET] = { |
| .constraints = { |
| .name = "db8500-esram34-ret", |
| .valid_ops_mask = REGULATOR_CHANGE_STATUS, |
| }, |
| }, |
| }; |
| |
| static struct ux500_wdt_data db8500_wdt_pdata = { |
| .timeout = 600, /* 10 minutes */ |
| .has_28_bits_resolution = true, |
| }; |
| /* |
| * Thermal Sensor |
| */ |
| |
| static struct resource db8500_thsens_resources[] = { |
| { |
| .name = "IRQ_HOTMON_LOW", |
| .start = IRQ_PRCMU_HOTMON_LOW, |
| .end = IRQ_PRCMU_HOTMON_LOW, |
| .flags = IORESOURCE_IRQ, |
| }, |
| { |
| .name = "IRQ_HOTMON_HIGH", |
| .start = IRQ_PRCMU_HOTMON_HIGH, |
| .end = IRQ_PRCMU_HOTMON_HIGH, |
| .flags = IORESOURCE_IRQ, |
| }, |
| }; |
| |
| static struct db8500_thsens_platform_data db8500_thsens_data = { |
| .trip_points[0] = { |
| .temp = 70000, |
| .type = THERMAL_TRIP_ACTIVE, |
| .cdev_name = { |
| [0] = "thermal-cpufreq-0", |
| }, |
| }, |
| .trip_points[1] = { |
| .temp = 75000, |
| .type = THERMAL_TRIP_ACTIVE, |
| .cdev_name = { |
| [0] = "thermal-cpufreq-0", |
| }, |
| }, |
| .trip_points[2] = { |
| .temp = 80000, |
| .type = THERMAL_TRIP_ACTIVE, |
| .cdev_name = { |
| [0] = "thermal-cpufreq-0", |
| }, |
| }, |
| .trip_points[3] = { |
| .temp = 85000, |
| .type = THERMAL_TRIP_CRITICAL, |
| }, |
| .num_trips = 4, |
| }; |
| |
| static const struct mfd_cell common_prcmu_devs[] = { |
| { |
| .name = "ux500_wdt", |
| .platform_data = &db8500_wdt_pdata, |
| .pdata_size = sizeof(db8500_wdt_pdata), |
| .id = -1, |
| }, |
| }; |
| |
| static const struct mfd_cell db8500_prcmu_devs[] = { |
| { |
| .name = "db8500-prcmu-regulators", |
| .of_compatible = "stericsson,db8500-prcmu-regulator", |
| .platform_data = &db8500_regulators, |
| .pdata_size = sizeof(db8500_regulators), |
| }, |
| { |
| .name = "cpufreq-ux500", |
| .of_compatible = "stericsson,cpufreq-ux500", |
| .platform_data = &db8500_cpufreq_table, |
| .pdata_size = sizeof(db8500_cpufreq_table), |
| }, |
| { |
| .name = "cpuidle-dbx500", |
| .of_compatible = "stericsson,cpuidle-dbx500", |
| }, |
| { |
| .name = "db8500-thermal", |
| .num_resources = ARRAY_SIZE(db8500_thsens_resources), |
| .resources = db8500_thsens_resources, |
| .platform_data = &db8500_thsens_data, |
| .pdata_size = sizeof(db8500_thsens_data), |
| }, |
| }; |
| |
| static void db8500_prcmu_update_cpufreq(void) |
| { |
| if (prcmu_has_arm_maxopp()) { |
| db8500_cpufreq_table[3].frequency = 1000000; |
| db8500_cpufreq_table[3].driver_data = ARM_MAX_OPP; |
| } |
| } |
| |
| static int db8500_prcmu_register_ab8500(struct device *parent, |
| struct ab8500_platform_data *pdata) |
| { |
| struct device_node *np; |
| struct resource ab8500_resource; |
| const struct mfd_cell ab8500_cell = { |
| .name = "ab8500-core", |
| .of_compatible = "stericsson,ab8500", |
| .id = AB8500_VERSION_AB8500, |
| .platform_data = pdata, |
| .pdata_size = sizeof(struct ab8500_platform_data), |
| .resources = &ab8500_resource, |
| .num_resources = 1, |
| }; |
| |
| if (!parent->of_node) |
| return -ENODEV; |
| |
| /* Look up the device node, sneak the IRQ out of it */ |
| for_each_child_of_node(parent->of_node, np) { |
| if (of_device_is_compatible(np, ab8500_cell.of_compatible)) |
| break; |
| } |
| if (!np) { |
| dev_info(parent, "could not find AB8500 node in the device tree\n"); |
| return -ENODEV; |
| } |
| of_irq_to_resource_table(np, &ab8500_resource, 1); |
| |
| return mfd_add_devices(parent, 0, &ab8500_cell, 1, NULL, 0, NULL); |
| } |
| |
| /** |
| * prcmu_fw_init - arch init call for the Linux PRCMU fw init logic |
| * |
| */ |
| static int db8500_prcmu_probe(struct platform_device *pdev) |
| { |
| struct device_node *np = pdev->dev.of_node; |
| struct prcmu_pdata *pdata = dev_get_platdata(&pdev->dev); |
| int irq = 0, err = 0; |
| struct resource *res; |
| |
| res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "prcmu"); |
| if (!res) { |
| dev_err(&pdev->dev, "no prcmu memory region provided\n"); |
| return -EINVAL; |
| } |
| prcmu_base = devm_ioremap(&pdev->dev, res->start, resource_size(res)); |
| if (!prcmu_base) { |
| dev_err(&pdev->dev, |
| "failed to ioremap prcmu register memory\n"); |
| return -ENOMEM; |
| } |
| init_prcm_registers(); |
| dbx500_fw_version_init(pdev, pdata->version_offset); |
| res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "prcmu-tcdm"); |
| if (!res) { |
| dev_err(&pdev->dev, "no prcmu tcdm region provided\n"); |
| return -EINVAL; |
| } |
| tcdm_base = devm_ioremap(&pdev->dev, res->start, |
| resource_size(res)); |
| if (!tcdm_base) { |
| dev_err(&pdev->dev, |
| "failed to ioremap prcmu-tcdm register memory\n"); |
| return -ENOMEM; |
| } |
| |
| /* Clean up the mailbox interrupts after pre-kernel code. */ |
| writel(ALL_MBOX_BITS, PRCM_ARM_IT1_CLR); |
| |
| irq = platform_get_irq(pdev, 0); |
| if (irq <= 0) { |
| dev_err(&pdev->dev, "no prcmu irq provided\n"); |
| return irq; |
| } |
| |
| err = request_threaded_irq(irq, prcmu_irq_handler, |
| prcmu_irq_thread_fn, IRQF_NO_SUSPEND, "prcmu", NULL); |
| if (err < 0) { |
| pr_err("prcmu: Failed to allocate IRQ_DB8500_PRCMU1.\n"); |
| return err; |
| } |
| |
| db8500_irq_init(np); |
| |
| prcmu_config_esram0_deep_sleep(ESRAM0_DEEP_SLEEP_STATE_RET); |
| |
| db8500_prcmu_update_cpufreq(); |
| |
| err = mfd_add_devices(&pdev->dev, 0, common_prcmu_devs, |
| ARRAY_SIZE(common_prcmu_devs), NULL, 0, db8500_irq_domain); |
| if (err) { |
| pr_err("prcmu: Failed to add subdevices\n"); |
| return err; |
| } |
| |
| /* TODO: Remove restriction when clk definitions are available. */ |
| if (!of_machine_is_compatible("st-ericsson,u8540")) { |
| err = mfd_add_devices(&pdev->dev, 0, db8500_prcmu_devs, |
| ARRAY_SIZE(db8500_prcmu_devs), NULL, 0, |
| db8500_irq_domain); |
| if (err) { |
| mfd_remove_devices(&pdev->dev); |
| pr_err("prcmu: Failed to add subdevices\n"); |
| return err; |
| } |
| } |
| |
| err = db8500_prcmu_register_ab8500(&pdev->dev, pdata->ab_platdata); |
| if (err) { |
| mfd_remove_devices(&pdev->dev); |
| pr_err("prcmu: Failed to add ab8500 subdevice\n"); |
| return err; |
| } |
| |
| pr_info("DB8500 PRCMU initialized\n"); |
| return err; |
| } |
| static const struct of_device_id db8500_prcmu_match[] = { |
| { .compatible = "stericsson,db8500-prcmu"}, |
| { }, |
| }; |
| |
| static struct platform_driver db8500_prcmu_driver = { |
| .driver = { |
| .name = "db8500-prcmu", |
| .owner = THIS_MODULE, |
| .of_match_table = db8500_prcmu_match, |
| }, |
| .probe = db8500_prcmu_probe, |
| }; |
| |
| static int __init db8500_prcmu_init(void) |
| { |
| return platform_driver_register(&db8500_prcmu_driver); |
| } |
| |
| core_initcall(db8500_prcmu_init); |
| |
| MODULE_AUTHOR("Mattias Nilsson <mattias.i.nilsson@stericsson.com>"); |
| MODULE_DESCRIPTION("DB8500 PRCM Unit driver"); |
| MODULE_LICENSE("GPL v2"); |