mirror of
https://github.com/torvalds/linux.git
synced 2024-11-13 23:51:39 +00:00
719154c6d1
Fix several build warning while using bf609-ezkit_defconfig. Signed-off-by: Bob Liu <lliubbo@gmail.com>
363 lines
11 KiB
C
363 lines
11 KiB
C
/*
|
|
* Blackfin bf609 power management
|
|
*
|
|
* Copyright 2011 Analog Devices Inc.
|
|
*
|
|
* Licensed under the GPL-2
|
|
*/
|
|
|
|
#include <linux/suspend.h>
|
|
#include <linux/io.h>
|
|
#include <linux/interrupt.h>
|
|
#include <linux/gpio.h>
|
|
#include <linux/irq.h>
|
|
#include <linux/delay.h>
|
|
#include <linux/syscore_ops.h>
|
|
|
|
#include <asm/dpmc.h>
|
|
#include <asm/pm.h>
|
|
#include <mach/pm.h>
|
|
#include <asm/blackfin.h>
|
|
#include <asm/mem_init.h>
|
|
|
|
/***********************************************************/
|
|
/* */
|
|
/* Wakeup Actions for DPM_RESTORE */
|
|
/* */
|
|
/***********************************************************/
|
|
#define BITP_ROM_WUA_CHKHDR 24
|
|
#define BITP_ROM_WUA_DDRLOCK 7
|
|
#define BITP_ROM_WUA_DDRDLLEN 6
|
|
#define BITP_ROM_WUA_DDR 5
|
|
#define BITP_ROM_WUA_CGU 4
|
|
#define BITP_ROM_WUA_MEMBOOT 2
|
|
#define BITP_ROM_WUA_EN 1
|
|
|
|
#define BITM_ROM_WUA_CHKHDR (0xFF000000)
|
|
#define ENUM_ROM_WUA_CHKHDR_AD 0xAD000000
|
|
|
|
#define BITM_ROM_WUA_DDRLOCK (0x00000080)
|
|
#define BITM_ROM_WUA_DDRDLLEN (0x00000040)
|
|
#define BITM_ROM_WUA_DDR (0x00000020)
|
|
#define BITM_ROM_WUA_CGU (0x00000010)
|
|
#define BITM_ROM_WUA_MEMBOOT (0x00000002)
|
|
#define BITM_ROM_WUA_EN (0x00000001)
|
|
|
|
/***********************************************************/
|
|
/* */
|
|
/* Syscontrol */
|
|
/* */
|
|
/***********************************************************/
|
|
#define BITP_ROM_SYSCTRL_CGU_LOCKINGEN 28 /* unlocks CGU_CTL register */
|
|
#define BITP_ROM_SYSCTRL_WUA_OVERRIDE 24
|
|
#define BITP_ROM_SYSCTRL_WUA_DDRDLLEN 20 /* Saves the DDR DLL and PADS registers to the DPM registers */
|
|
#define BITP_ROM_SYSCTRL_WUA_DDR 19 /* Saves the DDR registers to the DPM registers */
|
|
#define BITP_ROM_SYSCTRL_WUA_CGU 18 /* Saves the CGU registers into DPM registers */
|
|
#define BITP_ROM_SYSCTRL_WUA_DPMWRITE 17 /* Saves the Syscontrol structure structure contents into DPM registers */
|
|
#define BITP_ROM_SYSCTRL_WUA_EN 16 /* reads current PLL and DDR configuration into structure */
|
|
#define BITP_ROM_SYSCTRL_DDR_WRITE 13 /* writes the DDR registers from Syscontrol structure for wakeup initialization of DDR */
|
|
#define BITP_ROM_SYSCTRL_DDR_READ 12 /* Read the DDR registers into the Syscontrol structure for storing prior to hibernate */
|
|
#define BITP_ROM_SYSCTRL_CGU_AUTODIS 11 /* Disables auto handling of UPDT and ALGN fields */
|
|
#define BITP_ROM_SYSCTRL_CGU_CLKOUTSEL 7 /* access CGU_CLKOUTSEL register */
|
|
#define BITP_ROM_SYSCTRL_CGU_DIV 6 /* access CGU_DIV register */
|
|
#define BITP_ROM_SYSCTRL_CGU_STAT 5 /* access CGU_STAT register */
|
|
#define BITP_ROM_SYSCTRL_CGU_CTL 4 /* access CGU_CTL register */
|
|
#define BITP_ROM_SYSCTRL_CGU_RTNSTAT 2 /* Update structure STAT field upon error */
|
|
#define BITP_ROM_SYSCTRL_WRITE 1 /* write registers */
|
|
#define BITP_ROM_SYSCTRL_READ 0 /* read registers */
|
|
|
|
#define BITM_ROM_SYSCTRL_CGU_READ (0x00000001) /* Read CGU registers */
|
|
#define BITM_ROM_SYSCTRL_CGU_WRITE (0x00000002) /* Write registers */
|
|
#define BITM_ROM_SYSCTRL_CGU_RTNSTAT (0x00000004) /* Update structure STAT field upon error or after a write operation */
|
|
#define BITM_ROM_SYSCTRL_CGU_CTL (0x00000010) /* Access CGU_CTL register */
|
|
#define BITM_ROM_SYSCTRL_CGU_STAT (0x00000020) /* Access CGU_STAT register */
|
|
#define BITM_ROM_SYSCTRL_CGU_DIV (0x00000040) /* Access CGU_DIV register */
|
|
#define BITM_ROM_SYSCTRL_CGU_CLKOUTSEL (0x00000080) /* Access CGU_CLKOUTSEL register */
|
|
#define BITM_ROM_SYSCTRL_CGU_AUTODIS (0x00000800) /* Disables auto handling of UPDT and ALGN fields */
|
|
#define BITM_ROM_SYSCTRL_DDR_READ (0x00001000) /* Reads the contents of the DDR registers and stores them into the structure */
|
|
#define BITM_ROM_SYSCTRL_DDR_WRITE (0x00002000) /* Writes the DDR registers from the structure, only really intented for wakeup functionality and not for full DDR configuration */
|
|
#define BITM_ROM_SYSCTRL_WUA_EN (0x00010000) /* Wakeup entry or exit opertation enable */
|
|
#define BITM_ROM_SYSCTRL_WUA_DPMWRITE (0x00020000) /* When set indicates a restore of the PLL and DDR is to be performed otherwise a save is required */
|
|
#define BITM_ROM_SYSCTRL_WUA_CGU (0x00040000) /* Only applicable for a PLL and DDR save operation to the DPM, saves the current settings if cleared or the contents of the structure if set */
|
|
#define BITM_ROM_SYSCTRL_WUA_DDR (0x00080000) /* Only applicable for a PLL and DDR save operation to the DPM, saves the current settings if cleared or the contents of the structure if set */
|
|
#define BITM_ROM_SYSCTRL_WUA_DDRDLLEN (0x00100000) /* Enables saving/restoring of the DDR DLLCTL register */
|
|
#define BITM_ROM_SYSCTRL_WUA_OVERRIDE (0x01000000)
|
|
#define BITM_ROM_SYSCTRL_CGU_LOCKINGEN (0x10000000) /* Unlocks the CGU_CTL register */
|
|
|
|
|
|
/* Structures for the syscontrol() function */
|
|
struct STRUCT_ROM_SYSCTRL {
|
|
uint32_t ulCGU_CTL;
|
|
uint32_t ulCGU_STAT;
|
|
uint32_t ulCGU_DIV;
|
|
uint32_t ulCGU_CLKOUTSEL;
|
|
uint32_t ulWUA_Flags;
|
|
uint32_t ulWUA_BootAddr;
|
|
uint32_t ulWUA_User;
|
|
uint32_t ulDDR_CTL;
|
|
uint32_t ulDDR_CFG;
|
|
uint32_t ulDDR_TR0;
|
|
uint32_t ulDDR_TR1;
|
|
uint32_t ulDDR_TR2;
|
|
uint32_t ulDDR_MR;
|
|
uint32_t ulDDR_EMR1;
|
|
uint32_t ulDDR_EMR2;
|
|
uint32_t ulDDR_PADCTL;
|
|
uint32_t ulDDR_DLLCTL;
|
|
uint32_t ulReserved;
|
|
};
|
|
|
|
struct bfin_pm_data {
|
|
uint32_t magic;
|
|
uint32_t resume_addr;
|
|
uint32_t sp;
|
|
};
|
|
|
|
struct bfin_pm_data bf609_pm_data;
|
|
|
|
struct STRUCT_ROM_SYSCTRL configvalues;
|
|
uint32_t dactionflags;
|
|
|
|
#define FUNC_ROM_SYSCONTROL 0xC8000080
|
|
__attribute__((l1_data))
|
|
static uint32_t (* const bfrom_SysControl)(uint32_t action_flags, struct STRUCT_ROM_SYSCTRL *settings, void *reserved) = (void *)FUNC_ROM_SYSCONTROL;
|
|
|
|
__attribute__((l1_text))
|
|
void bfin_cpu_suspend(void)
|
|
{
|
|
__asm__ __volatile__( \
|
|
".align 8;" \
|
|
"idle;" \
|
|
: : \
|
|
);
|
|
}
|
|
|
|
__attribute__((l1_text))
|
|
void bf609_ddr_sr(void)
|
|
{
|
|
dmc_enter_self_refresh();
|
|
}
|
|
|
|
__attribute__((l1_text))
|
|
void bf609_ddr_sr_exit(void)
|
|
{
|
|
dmc_exit_self_refresh();
|
|
|
|
/* After wake up from deep sleep and exit DDR from self refress mode,
|
|
* should wait till CGU PLL is locked.
|
|
*/
|
|
while (bfin_read32(CGU0_STAT) & CLKSALGN)
|
|
continue;
|
|
}
|
|
|
|
__attribute__((l1_text))
|
|
void bf609_resume_ccbuf(void)
|
|
{
|
|
bfin_write32(DPM0_CCBF_EN, 3);
|
|
bfin_write32(DPM0_CTL, 2);
|
|
|
|
while ((bfin_read32(DPM0_STAT) & 0xf) != 1);
|
|
}
|
|
|
|
__attribute__((l1_text))
|
|
void bfin_hibernate_syscontrol(void)
|
|
{
|
|
configvalues.ulWUA_Flags = (0xAD000000 | BITM_ROM_WUA_EN
|
|
| BITM_ROM_WUA_CGU | BITM_ROM_WUA_DDR | BITM_ROM_WUA_DDRDLLEN);
|
|
|
|
dactionflags = (BITM_ROM_SYSCTRL_WUA_EN
|
|
| BITM_ROM_SYSCTRL_WUA_DPMWRITE | BITM_ROM_SYSCTRL_WUA_CGU
|
|
| BITM_ROM_SYSCTRL_WUA_DDR | BITM_ROM_SYSCTRL_WUA_DDRDLLEN);
|
|
|
|
bfrom_SysControl(dactionflags, &configvalues, NULL);
|
|
|
|
bfin_write32(DPM0_RESTORE5, bfin_read32(DPM0_RESTORE5) | 4);
|
|
}
|
|
|
|
#define IRQ_SID(irq) ((irq) - IVG15)
|
|
asmlinkage void enter_deepsleep(void);
|
|
|
|
__attribute__((l1_text))
|
|
void bfin_deepsleep(unsigned long mask, unsigned long pol_mask)
|
|
{
|
|
bfin_write32(DPM0_WAKE_EN, mask);
|
|
bfin_write32(DPM0_WAKE_POL, pol_mask);
|
|
SSYNC();
|
|
enter_deepsleep();
|
|
}
|
|
|
|
void bfin_hibernate(unsigned long mask, unsigned long pol_mask)
|
|
{
|
|
bfin_write32(DPM0_WAKE_EN, mask);
|
|
bfin_write32(DPM0_WAKE_POL, pol_mask);
|
|
bfin_write32(DPM0_PGCNTR, 0x0000FFFF);
|
|
bfin_write32(DPM0_HIB_DIS, 0xFFFF);
|
|
|
|
bf609_hibernate();
|
|
}
|
|
|
|
void bf609_cpu_pm_enter(suspend_state_t state)
|
|
{
|
|
int error;
|
|
unsigned long wakeup = 0;
|
|
unsigned long wakeup_pol = 0;
|
|
|
|
#ifdef CONFIG_PM_BFIN_WAKE_PA15
|
|
wakeup |= PA15WE;
|
|
# if CONFIG_PM_BFIN_WAKE_PA15_POL
|
|
wakeup_pol |= PA15WE;
|
|
# endif
|
|
#endif
|
|
|
|
#ifdef CONFIG_PM_BFIN_WAKE_PB15
|
|
wakeup |= PB15WE;
|
|
# if CONFIG_PM_BFIN_WAKE_PA15_POL
|
|
wakeup_pol |= PB15WE;
|
|
# endif
|
|
#endif
|
|
|
|
#ifdef CONFIG_PM_BFIN_WAKE_PC15
|
|
wakeup |= PC15WE;
|
|
# if CONFIG_PM_BFIN_WAKE_PC15_POL
|
|
wakeup_pol |= PC15WE;
|
|
# endif
|
|
#endif
|
|
|
|
#ifdef CONFIG_PM_BFIN_WAKE_PD06
|
|
wakeup |= PD06WE;
|
|
# if CONFIG_PM_BFIN_WAKE_PD06_POL
|
|
wakeup_pol |= PD06WE;
|
|
# endif
|
|
#endif
|
|
|
|
#ifdef CONFIG_PM_BFIN_WAKE_PE12
|
|
wakeup |= PE12WE;
|
|
# if CONFIG_PM_BFIN_WAKE_PE12_POL
|
|
wakeup_pol |= PE12WE;
|
|
# endif
|
|
#endif
|
|
|
|
#ifdef CONFIG_PM_BFIN_WAKE_PG04
|
|
wakeup |= PG04WE;
|
|
# if CONFIG_PM_BFIN_WAKE_PG04_POL
|
|
wakeup_pol |= PG04WE;
|
|
# endif
|
|
#endif
|
|
|
|
#ifdef CONFIG_PM_BFIN_WAKE_PG13
|
|
wakeup |= PG13WE;
|
|
# if CONFIG_PM_BFIN_WAKE_PG13_POL
|
|
wakeup_pol |= PG13WE;
|
|
# endif
|
|
#endif
|
|
|
|
#ifdef CONFIG_PM_BFIN_WAKE_USB
|
|
wakeup |= USBWE;
|
|
# if CONFIG_PM_BFIN_WAKE_USB_POL
|
|
wakeup_pol |= USBWE;
|
|
# endif
|
|
#endif
|
|
|
|
error = irq_set_irq_wake(255, 1);
|
|
if(error < 0)
|
|
printk(KERN_DEBUG "Unable to get irq wake\n");
|
|
error = irq_set_irq_wake(231, 1);
|
|
if (error < 0)
|
|
printk(KERN_DEBUG "Unable to get irq wake\n");
|
|
|
|
if (state == PM_SUSPEND_STANDBY)
|
|
bfin_deepsleep(wakeup, wakeup_pol);
|
|
else {
|
|
bfin_hibernate(wakeup, wakeup_pol);
|
|
}
|
|
|
|
}
|
|
|
|
int bf609_cpu_pm_prepare(void)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
void bf609_cpu_pm_finish(void)
|
|
{
|
|
|
|
}
|
|
|
|
static struct bfin_cpu_pm_fns bf609_cpu_pm = {
|
|
.enter = bf609_cpu_pm_enter,
|
|
.prepare = bf609_cpu_pm_prepare,
|
|
.finish = bf609_cpu_pm_finish,
|
|
};
|
|
|
|
#if defined(CONFIG_MTD_PHYSMAP) || defined(CONFIG_MTD_PHYSMAP_MODULE)
|
|
static int smc_pm_syscore_suspend(void)
|
|
{
|
|
bf609_nor_flash_exit();
|
|
return 0;
|
|
}
|
|
|
|
static void smc_pm_syscore_resume(void)
|
|
{
|
|
bf609_nor_flash_init();
|
|
}
|
|
|
|
static struct syscore_ops smc_pm_syscore_ops = {
|
|
.suspend = smc_pm_syscore_suspend,
|
|
.resume = smc_pm_syscore_resume,
|
|
};
|
|
#endif
|
|
|
|
static irqreturn_t test_isr(int irq, void *dev_id)
|
|
{
|
|
printk(KERN_DEBUG "gpio irq %d\n", irq);
|
|
if (irq == 231)
|
|
bfin_sec_raise_irq(IRQ_SID(IRQ_SOFT1));
|
|
return IRQ_HANDLED;
|
|
}
|
|
|
|
static irqreturn_t dpm0_isr(int irq, void *dev_id)
|
|
{
|
|
bfin_write32(DPM0_WAKE_STAT, bfin_read32(DPM0_WAKE_STAT));
|
|
bfin_write32(CGU0_STAT, bfin_read32(CGU0_STAT));
|
|
return IRQ_HANDLED;
|
|
}
|
|
|
|
static int __init bf609_init_pm(void)
|
|
{
|
|
int irq;
|
|
int error;
|
|
|
|
#if defined(CONFIG_MTD_PHYSMAP) || defined(CONFIG_MTD_PHYSMAP_MODULE)
|
|
register_syscore_ops(&smc_pm_syscore_ops);
|
|
#endif
|
|
|
|
#ifdef CONFIG_PM_BFIN_WAKE_PE12
|
|
irq = gpio_to_irq(GPIO_PE12);
|
|
if (irq < 0) {
|
|
error = irq;
|
|
printk(KERN_DEBUG "Unable to get irq number for GPIO %d, error %d\n",
|
|
GPIO_PE12, error);
|
|
}
|
|
|
|
error = request_irq(irq, test_isr, IRQF_TRIGGER_RISING | IRQF_NO_SUSPEND
|
|
| IRQF_FORCE_RESUME, "gpiope12", NULL);
|
|
if(error < 0)
|
|
printk(KERN_DEBUG "Unable to get irq\n");
|
|
#endif
|
|
|
|
error = request_irq(IRQ_CGU_EVT, dpm0_isr, IRQF_NO_SUSPEND |
|
|
IRQF_FORCE_RESUME, "cgu0 event", NULL);
|
|
if(error < 0)
|
|
printk(KERN_DEBUG "Unable to get irq\n");
|
|
|
|
error = request_irq(IRQ_DPM, dpm0_isr, IRQF_NO_SUSPEND |
|
|
IRQF_FORCE_RESUME, "dpm0 event", NULL);
|
|
if (error < 0)
|
|
printk(KERN_DEBUG "Unable to get irq\n");
|
|
|
|
bfin_cpu_pm = &bf609_cpu_pm;
|
|
return 0;
|
|
}
|
|
|
|
late_initcall(bf609_init_pm);
|