arch/arm/mach-mmp/pm-pxa910.c

   1 /*
   2  * PXA910 Power Management Routines
   3  *
   4  * This software program is licensed subject to the GNU General Public License
   5  * (GPL).Version 2,June 1991, available at http://www.fsf.org/copyleft/gpl.html
   6  *
   7  * (C) Copyright 2009 Marvell International Ltd.
   8  * All Rights Reserved
   9  */
  10
  11 #include <linux/kernel.h>
  12 #include <linux/errno.h>
  13 #include <linux/err.h>
  14 #include <linux/time.h>
  15 #include <linux/delay.h>
  16 #include <linux/suspend.h>
  17 #include <linux/interrupt.h>
  18 #include <linux/io.h>
  19 #include <linux/irq.h>
  20 #include <asm/mach-types.h>
  21 #include <asm/outercache.h>
  22
  23 #include "cputype.h"
  24 #include "addr-map.h"
  25 #include "pm-pxa910.h"
  26 #include "regs-icu.h"
  27 #include "irqs.h"
  28
  29 int pxa910_set_wake(struct irq_data *data, unsigned int on)
  30 {
  31         uint32_t awucrm = 0, apcr = 0;
  32         int irq = data->irq;
  33
  34         /* setting wakeup sources */
  35         switch (irq) {
  36         /* wakeup line 2 */
  37         case IRQ_PXA910_AP_GPIO:
  38                 awucrm = MPMU_AWUCRM_WAKEUP(2);
  39                 apcr |= MPMU_APCR_SLPWP2;
  40                 break;
  41         /* wakeup line 3 */
  42         case IRQ_PXA910_KEYPAD:
  43                 awucrm = MPMU_AWUCRM_WAKEUP(3) | MPMU_AWUCRM_KEYPRESS;
  44                 apcr |= MPMU_APCR_SLPWP3;
  45                 break;
  46         case IRQ_PXA910_ROTARY:
  47                 awucrm = MPMU_AWUCRM_WAKEUP(3) | MPMU_AWUCRM_NEWROTARY;
  48                 apcr |= MPMU_APCR_SLPWP3;
  49                 break;
  50         case IRQ_PXA910_TRACKBALL:
  51                 awucrm = MPMU_AWUCRM_WAKEUP(3) | MPMU_AWUCRM_TRACKBALL;
  52                 apcr |= MPMU_APCR_SLPWP3;
  53                 break;
  54         /* wakeup line 4 */
  55         case IRQ_PXA910_AP1_TIMER1:
  56                 awucrm = MPMU_AWUCRM_WAKEUP(4) | MPMU_AWUCRM_AP1_TIMER_1;
  57                 apcr |= MPMU_APCR_SLPWP4;
  58                 break;
  59         case IRQ_PXA910_AP1_TIMER2:
  60                 awucrm = MPMU_AWUCRM_WAKEUP(4) | MPMU_AWUCRM_AP1_TIMER_2;
  61                 apcr |= MPMU_APCR_SLPWP4;
  62                 break;
  63         case IRQ_PXA910_AP1_TIMER3:
  64                 awucrm = MPMU_AWUCRM_WAKEUP(4) | MPMU_AWUCRM_AP1_TIMER_3;
  65                 apcr |= MPMU_APCR_SLPWP4;
  66                 break;
  67         case IRQ_PXA910_AP2_TIMER1:
  68                 awucrm = MPMU_AWUCRM_WAKEUP(4) | MPMU_AWUCRM_AP2_TIMER_1;
  69                 apcr |= MPMU_APCR_SLPWP4;
  70                 break;
  71         case IRQ_PXA910_AP2_TIMER2:
  72                 awucrm = MPMU_AWUCRM_WAKEUP(4) | MPMU_AWUCRM_AP2_TIMER_2;
  73                 apcr |= MPMU_APCR_SLPWP4;
  74                 break;
  75         case IRQ_PXA910_AP2_TIMER3:
  76                 awucrm = MPMU_AWUCRM_WAKEUP(4) | MPMU_AWUCRM_AP2_TIMER_3;
  77                 apcr |= MPMU_APCR_SLPWP4;
  78                 break;
  79         case IRQ_PXA910_RTC_ALARM:
  80                 awucrm = MPMU_AWUCRM_WAKEUP(4) | MPMU_AWUCRM_RTC_ALARM;
  81                 apcr |= MPMU_APCR_SLPWP4;
  82                 break;
  83         /* wakeup line 5 */
  84         case IRQ_PXA910_USB1:
  85         case IRQ_PXA910_USB2:
  86                 awucrm = MPMU_AWUCRM_WAKEUP(5);
  87                 apcr |= MPMU_APCR_SLPWP5;
  88                 break;
  89         /* wakeup line 6 */
  90         case IRQ_PXA910_MMC:
  91                 awucrm = MPMU_AWUCRM_WAKEUP(6)
  92                         | MPMU_AWUCRM_SDH1
  93                         | MPMU_AWUCRM_SDH2;
  94                 apcr |= MPMU_APCR_SLPWP6;
  95                 break;
  96         /* wakeup line 7 */
  97         case IRQ_PXA910_PMIC_INT:
  98                 awucrm = MPMU_AWUCRM_WAKEUP(7);
  99                 apcr |= MPMU_APCR_SLPWP7;
 100                 break;
 101         default:
 102                 if (irq >= IRQ_GPIO_START && irq < IRQ_BOARD_START) {
 103                         awucrm = MPMU_AWUCRM_WAKEUP(2);
 104                         apcr |= MPMU_APCR_SLPWP2;
 105                 } else {
 106                         /* FIXME: This should return a proper error code ! */
 107                         printk(KERN_ERR "Error: no defined wake up source irq: %d\n",
 108                                 irq);
 109                 }
 110         }
 111
 112         if (on) {
 113                 if (awucrm) {
 114                         awucrm |= __raw_readl(MPMU_AWUCRM);
 115                         __raw_writel(awucrm, MPMU_AWUCRM);
 116                 }
 117                 if (apcr) {
 118                         apcr = ~apcr & __raw_readl(MPMU_APCR);
 119                         __raw_writel(apcr, MPMU_APCR);
 120                 }
 121         } else {
 122                 if (awucrm) {
 123                         awucrm = ~awucrm & __raw_readl(MPMU_AWUCRM);
 124                         __raw_writel(awucrm, MPMU_AWUCRM);
 125                 }
 126                 if (apcr) {
 127                         apcr |= __raw_readl(MPMU_APCR);
 128                         __raw_writel(apcr, MPMU_APCR);
 129                 }
 130         }
 131         return 0;
 132 }
 133
 134 void pxa910_pm_enter_lowpower_mode(int state)
 135 {
 136         uint32_t idle_cfg, apcr;
 137
 138         idle_cfg = __raw_readl(APMU_MOH_IDLE_CFG);
 139         apcr = __raw_readl(MPMU_APCR);
 140
 141         apcr &= ~(MPMU_APCR_DDRCORSD | MPMU_APCR_APBSD | MPMU_APCR_AXISD
 142                 | MPMU_APCR_VCTCXOSD | MPMU_APCR_STBYEN);
 143         idle_cfg &= ~(APMU_MOH_IDLE_CFG_MOH_IDLE
 144                 | APMU_MOH_IDLE_CFG_MOH_PWRDWN);
 145
 146         switch (state) {
 147         case POWER_MODE_UDR:
 148                 /* only shutdown APB in UDR */
 149                 apcr |= MPMU_APCR_STBYEN | MPMU_APCR_APBSD;
 150                 /* fall through */
 151         case POWER_MODE_SYS_SLEEP:
 152                 apcr |= MPMU_APCR_SLPEN;                /* set the SLPEN bit */
 153                 apcr |= MPMU_APCR_VCTCXOSD;             /* set VCTCXOSD */
 154                 /* fall through */
 155         case POWER_MODE_APPS_SLEEP:
 156                 apcr |= MPMU_APCR_DDRCORSD;             /* set DDRCORSD */
 157                 /* fall through */
 158         case POWER_MODE_APPS_IDLE:
 159                 apcr |= MPMU_APCR_AXISD;                /* set AXISDD bit */
 160                 /* fall through */
 161         case POWER_MODE_CORE_EXTIDLE:
 162                 idle_cfg |= APMU_MOH_IDLE_CFG_MOH_IDLE;
 163                 idle_cfg |= APMU_MOH_IDLE_CFG_MOH_PWRDWN;
 164                 idle_cfg |= APMU_MOH_IDLE_CFG_MOH_PWR_SW(3)
 165                         | APMU_MOH_IDLE_CFG_MOH_L2_PWR_SW(3);
 166                 /* fall through */
 167         case POWER_MODE_CORE_INTIDLE:
 168                 break;
 169         }
 170
 171         /* program the memory controller hardware sleep type and auto wakeup */
 172         idle_cfg |= APMU_MOH_IDLE_CFG_MOH_DIS_MC_SW_REQ;
 173         idle_cfg |= APMU_MOH_IDLE_CFG_MOH_MC_WAKE_EN;
 174         __raw_writel(0x0, APMU_MC_HW_SLP_TYPE);         /* auto refresh */
 175
 176         /* set DSPSD, DTCMSD, BBSD, MSASLPEN */
 177         apcr |= MPMU_APCR_DSPSD | MPMU_APCR_DTCMSD | MPMU_APCR_BBSD
 178                 | MPMU_APCR_MSASLPEN;
 179
 180         /*always set SLEPEN bit mainly for MSA*/
 181         apcr |= MPMU_APCR_SLPEN;
 182
 183         /* finally write the registers back */
 184         __raw_writel(idle_cfg, APMU_MOH_IDLE_CFG);
 185         __raw_writel(apcr, MPMU_APCR);
 186
 187 }
 188
 189 static int pxa910_pm_enter(suspend_state_t state)
 190 {
 191         unsigned int idle_cfg, reg = 0;
 192
 193         /*pmic thread not completed,exit;otherwise system can't be waked up*/
 194         reg = __raw_readl(ICU_INT_CONF(IRQ_PXA910_PMIC_INT));
 195         if ((reg & 0x3) == 0)
 196                 return -EAGAIN;
 197
 198         idle_cfg = __raw_readl(APMU_MOH_IDLE_CFG);
 199         idle_cfg |= APMU_MOH_IDLE_CFG_MOH_PWRDWN
 200                 | APMU_MOH_IDLE_CFG_MOH_SRAM_PWRDWN;
 201         __raw_writel(idle_cfg, APMU_MOH_IDLE_CFG);
 202
 203         /* disable L2 */
 204         outer_disable();
 205         /* wait for l2 idle */
 206         while (!(readl(CIU_REG(0x8)) & (1 << 16)))
 207                 udelay(1);
 208
 209         cpu_do_idle();
 210
 211         /* enable L2 */
 212         outer_resume();
 213         /* wait for l2 idle */
 214         while (!(readl(CIU_REG(0x8)) & (1 << 16)))
 215                 udelay(1);
 216
 217         idle_cfg = __raw_readl(APMU_MOH_IDLE_CFG);
 218         idle_cfg &= ~(APMU_MOH_IDLE_CFG_MOH_PWRDWN
 219                 | APMU_MOH_IDLE_CFG_MOH_SRAM_PWRDWN);
 220         __raw_writel(idle_cfg, APMU_MOH_IDLE_CFG);
 221
 222         return 0;
 223 }
 224
 225 /*
 226  * Called after processes are frozen, but before we shut down devices.
 227  */
 228 static int pxa910_pm_prepare(void)
 229 {
 230         pxa910_pm_enter_lowpower_mode(POWER_MODE_UDR);
 231         return 0;
 232 }
 233
 234 /*
 235  * Called after devices are re-setup, but before processes are thawed.
 236  */
 237 static void pxa910_pm_finish(void)
 238 {
 239         pxa910_pm_enter_lowpower_mode(POWER_MODE_CORE_INTIDLE);
 240 }
 241
 242 static int pxa910_pm_valid(suspend_state_t state)
 243 {
 244         return ((state == PM_SUSPEND_STANDBY) || (state == PM_SUSPEND_MEM));
 245 }
 246
 247 static const struct platform_suspend_ops pxa910_pm_ops = {
 248         .valid          = pxa910_pm_valid,
 249         .prepare        = pxa910_pm_prepare,
 250         .enter          = pxa910_pm_enter,
 251         .finish         = pxa910_pm_finish,
 252 };
 253
 254 static int __init pxa910_pm_init(void)
 255 {
 256         uint32_t awucrm = 0;
 257
 258         if (!cpu_is_pxa910())
 259                 return -EIO;
 260
 261         suspend_set_ops(&pxa910_pm_ops);
 262
 263         /* Set the following bits for MMP3 playback with VCTXO on */
 264         __raw_writel(__raw_readl(APMU_SQU_CLK_GATE_CTRL) | (1 << 30),
 265                 APMU_SQU_CLK_GATE_CTRL);
 266         __raw_writel(__raw_readl(MPMU_FCCR) | (1 << 28), MPMU_FCCR);
 267
 268         awucrm |= MPMU_AWUCRM_AP_ASYNC_INT | MPMU_AWUCRM_AP_FULL_IDLE;
 269         __raw_writel(awucrm, MPMU_AWUCRM);
 270
 271         return 0;
 272 }
 273
 274 late_initcall(pxa910_pm_init);