blackfin: bf60x: add power management support
Add bf60x cpu pm callbacks and change blackfin pm framework to support bf60x.
Signed-off-by: Steven Miao <realmz6@gmail.com>
Signed-off-by: Bob Liu <lliubbo@gmail.com>
diff --git a/arch/blackfin/mach-bf609/pm.c b/arch/blackfin/mach-bf609/pm.c
new file mode 100644
index 0000000..bbc5a79
--- /dev/null
+++ b/arch/blackfin/mach-bf609/pm.c
@@ -0,0 +1,310 @@
+/*
+ * 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 <asm/dpmc.h>
+#include <asm/pm.h>
+#include <mach/pm.h>
+#include <asm/blackfin.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 bfin_deepsleep(unsigned long mask)
+{
+ uint32_t dpm0_ctl;
+
+ bfin_write32(DPM0_WAKE_EN, 0x10);
+ bfin_write32(DPM0_WAKE_POL, 0x10);
+ dpm0_ctl = bfin_read32(DPM0_CTL);
+ dpm0_ctl = 0x00000008;
+ bfin_write32(DPM0_CTL, dpm0_ctl);
+ SSYNC();
+ __asm__ __volatile__( \
+ ".align 8;" \
+ "idle;" \
+ : : \
+ );
+}
+
+__attribute__((l1_text))
+void bf609_ddr_sr(void)
+{
+ uint32_t reg;
+
+ reg = bfin_read_DDR0_CTL();
+ reg |= 0x8;
+ bfin_write_DDR0_CTL(reg);
+
+ while (!(bfin_read_DDR0_STAT() & 0x8))
+ continue;
+}
+
+__attribute__((l1_text))
+void bf609_ddr_sr_exit(void)
+{
+ uint32_t reg;
+ while (!(bfin_read_DDR0_STAT() & 0x1))
+ continue;
+
+ reg = bfin_read_DDR0_CTL();
+ reg &= ~0x8;
+ bfin_write_DDR0_CTL(reg);
+
+ while ((bfin_read_DDR0_STAT() & 0x8))
+ continue;
+}
+
+__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);
+}
+
+#ifndef CONFIG_BF60x
+# define SIC_SYSIRQ(irq) (irq - (IRQ_CORETMR + 1))
+#else
+# define SIC_SYSIRQ(irq) ((irq) - IVG15)
+#endif
+void bfin_hibernate(unsigned long mask)
+{
+ bfin_write32(DPM0_WAKE_EN, 0x10);
+ bfin_write32(DPM0_WAKE_POL, 0x10);
+ bfin_write32(DPM0_PGCNTR, 0x0000FFFF);
+ bfin_write32(DPM0_HIB_DIS, 0xFFFF);
+
+ printk(KERN_DEBUG "hibernate: restore %x pgcnt %x\n", bfin_read32(DPM0_RESTORE0), bfin_read32(DPM0_PGCNTR));
+
+ bf609_hibernate();
+}
+
+void bf609_cpu_pm_enter(suspend_state_t state)
+{
+ int error;
+ 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(0xffff);
+ else {
+ bfin_hibernate(0xffff);
+ }
+}
+
+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,
+};
+
+static irqreturn_t test_isr(int irq, void *dev_id)
+{
+ printk(KERN_DEBUG "gpio irq %d\n", irq);
+ return IRQ_HANDLED;
+}
+
+static irqreturn_t dpm0_isr(int irq, void *dev_id)
+{
+ uint32_t wake_stat;
+
+ wake_stat = bfin_read32(DPM0_WAKE_STAT);
+ printk(KERN_DEBUG "enter %s wake stat %08x\n", __func__, wake_stat);
+
+ bfin_write32(DPM0_WAKE_STAT, wake_stat);
+ return IRQ_HANDLED;
+}
+
+static int __init bf609_init_pm(void)
+{
+ int irq;
+ int error;
+ error = gpio_request(GPIO_PG4, "gpiopg4");
+ if (error < 0) {
+ printk(KERN_DEBUG "failed to request GPIO %d, error %d\n",
+ GPIO_PG4, error);
+ }
+
+ irq = gpio_to_irq(GPIO_PG4);
+ if (irq < 0) {
+ error = irq;
+ printk(KERN_DEBUG "Unable to get irq number for GPIO %d, error %d\n",
+ GPIO_PG4, error);
+ }
+
+ printk(KERN_DEBUG "%s gpio %d irq %d\n", __func__, GPIO_PG4, irq);
+
+ error = request_irq(irq, test_isr, IRQF_TRIGGER_FALLING | IRQF_NO_SUSPEND, "gpiopg4", NULL);
+ if(error < 0)
+ printk(KERN_DEBUG "Unable to get irq\n");
+
+#if 1
+ 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, "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, "cgu0 event", NULL);
+ if(error < 0)
+ printk(KERN_DEBUG "Unable to get irq\n");
+
+ error = request_irq(IRQ_DPM, dpm0_isr, IRQF_NO_SUSPEND, "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);