1 #include <linux/init.h>
5 #include <asm/mpc52xx.h>
6 #include "mpc52xx_pic.h"
8 /* defined in lite5200_sleep.S and only used here */
9 extern void lite5200_low_power(void __iomem *sram, void __iomem *mbar);
11 static struct mpc52xx_cdm __iomem *cdm;
12 static struct mpc52xx_intr __iomem *pic;
13 static struct mpc52xx_sdma __iomem *bes;
14 static struct mpc52xx_xlb __iomem *xlb;
15 static struct mpc52xx_gpio __iomem *gps;
16 static struct mpc52xx_gpio_wkup __iomem *gpw;
17 static void __iomem *sram;
18 static const int sram_size = 0x4000; /* 16 kBytes */
19 static void __iomem *mbar;
21 static int lite5200_pm_valid(suspend_state_t state)
24 case PM_SUSPEND_STANDBY:
32 static int lite5200_pm_prepare(suspend_state_t state)
34 /* deep sleep? let mpc52xx code handle that */
35 if (state == PM_SUSPEND_STANDBY)
36 return mpc52xx_pm_prepare(state);
38 if (state != PM_SUSPEND_MEM)
42 mbar = mpc52xx_find_and_map("mpc5200");
44 printk(KERN_ERR "%s:%i Error mapping registers\n", __func__, __LINE__);
59 /* save and restore registers not bound to any real devices */
60 static struct mpc52xx_cdm scdm;
61 static struct mpc52xx_intr spic;
62 static struct mpc52xx_sdma sbes;
63 static struct mpc52xx_xlb sxlb;
64 static struct mpc52xx_gpio sgps;
65 static struct mpc52xx_gpio_wkup sgpw;
67 static void lite5200_save_regs(void)
69 _memcpy_fromio(&spic, pic, sizeof(*pic));
70 _memcpy_fromio(&sbes, bes, sizeof(*bes));
71 _memcpy_fromio(&scdm, cdm, sizeof(*cdm));
72 _memcpy_fromio(&sxlb, xlb, sizeof(*xlb));
73 _memcpy_fromio(&sgps, gps, sizeof(*gps));
74 _memcpy_fromio(&sgpw, gpw, sizeof(*gpw));
76 _memcpy_fromio(saved_sram, sram, sram_size);
79 static void lite5200_restore_regs(void)
82 _memcpy_toio(sram, saved_sram, sram_size);
86 * GPIOs. Interrupt Master Enable has higher address then other
87 * registers, so just memcpy is ok.
89 _memcpy_toio(gpw, &sgpw, sizeof(*gpw));
90 _memcpy_toio(gps, &sgps, sizeof(*gps));
94 out_be32(&xlb->snoop_window, sxlb.snoop_window);
95 out_be32(&xlb->master_priority, sxlb.master_priority);
96 out_be32(&xlb->master_pri_enable, sxlb.master_pri_enable);
99 out_be32(&xlb->int_enable, sxlb.int_enable);
100 out_be32(&xlb->config, sxlb.config);
103 /* CDM - Clock Distribution Module */
104 out_8(&cdm->ipb_clk_sel, scdm.ipb_clk_sel);
105 out_8(&cdm->pci_clk_sel, scdm.pci_clk_sel);
107 out_8(&cdm->ext_48mhz_en, scdm.ext_48mhz_en);
108 out_8(&cdm->fd_enable, scdm.fd_enable);
109 out_be16(&cdm->fd_counters, scdm.fd_counters);
111 out_be32(&cdm->clk_enables, scdm.clk_enables);
113 out_8(&cdm->osc_disable, scdm.osc_disable);
115 out_be16(&cdm->mclken_div_psc1, scdm.mclken_div_psc1);
116 out_be16(&cdm->mclken_div_psc2, scdm.mclken_div_psc2);
117 out_be16(&cdm->mclken_div_psc3, scdm.mclken_div_psc3);
118 out_be16(&cdm->mclken_div_psc6, scdm.mclken_div_psc6);
122 out_be32(&bes->taskBar, sbes.taskBar);
123 out_be32(&bes->currentPointer, sbes.currentPointer);
124 out_be32(&bes->endPointer, sbes.endPointer);
125 out_be32(&bes->variablePointer, sbes.variablePointer);
127 out_8(&bes->IntVect1, sbes.IntVect1);
128 out_8(&bes->IntVect2, sbes.IntVect2);
129 out_be16(&bes->PtdCntrl, sbes.PtdCntrl);
132 out_8(&bes->ipr[i], sbes.ipr[i]);
134 out_be32(&bes->cReqSelect, sbes.cReqSelect);
135 out_be32(&bes->task_size0, sbes.task_size0);
136 out_be32(&bes->task_size1, sbes.task_size1);
137 out_be32(&bes->MDEDebug, sbes.MDEDebug);
138 out_be32(&bes->ADSDebug, sbes.ADSDebug);
139 out_be32(&bes->Value1, sbes.Value1);
140 out_be32(&bes->Value2, sbes.Value2);
141 out_be32(&bes->Control, sbes.Control);
142 out_be32(&bes->Status, sbes.Status);
143 out_be32(&bes->PTDDebug, sbes.PTDDebug);
147 out_be16(&bes->tcr[i], sbes.tcr[i]);
149 /* enable interrupts */
150 out_be32(&bes->IntPend, sbes.IntPend);
151 out_be32(&bes->IntMask, sbes.IntMask);
155 out_be32(&pic->per_pri1, spic.per_pri1);
156 out_be32(&pic->per_pri2, spic.per_pri2);
157 out_be32(&pic->per_pri3, spic.per_pri3);
159 out_be32(&pic->main_pri1, spic.main_pri1);
160 out_be32(&pic->main_pri2, spic.main_pri2);
162 out_be32(&pic->enc_status, spic.enc_status);
164 /* unmask and enable interrupts */
165 out_be32(&pic->per_mask, spic.per_mask);
166 out_be32(&pic->main_mask, spic.main_mask);
167 out_be32(&pic->ctrl, spic.ctrl);
170 static int lite5200_pm_enter(suspend_state_t state)
172 /* deep sleep? let mpc52xx code handle that */
173 if (state == PM_SUSPEND_STANDBY) {
174 return mpc52xx_pm_enter(state);
177 lite5200_save_regs();
179 /* effectively save FP regs */
182 lite5200_low_power(sram, mbar);
184 lite5200_restore_regs();
186 /* restart jiffies */
187 wakeup_decrementer();
193 static int lite5200_pm_finish(suspend_state_t state)
195 /* deep sleep? let mpc52xx code handle that */
196 if (state == PM_SUSPEND_STANDBY) {
197 return mpc52xx_pm_finish(state);
202 static struct pm_ops lite5200_pm_ops = {
203 .valid = lite5200_pm_valid,
204 .prepare = lite5200_pm_prepare,
205 .enter = lite5200_pm_enter,
206 .finish = lite5200_pm_finish,
209 int __init lite5200_pm_init(void)
211 pm_set_ops(&lite5200_pm_ops);