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authorMichael Hennerich <michael.hennerich@analog.com>2008-07-19 16:57:32 +0800
committerBryan Wu <cooloney@kernel.org>2008-07-19 16:57:32 +0800
commit1efc80b53eb54770139219f99657abd92595fc86 (patch)
tree254c76b3aaf22110b116e67a8118945006cacce6 /arch/blackfin/kernel
parent4f13f548cef5af1717cbbc341a1a3474f3e7466e (diff)
Blackfin arch: Functional power management support
Enable: PM_SUSPEND_MEM -> Blackfin Hibernate to SDRAM This feature requires a special bootloader (u-boot) supporting return from hibernate. Signed-off-by: Michael Hennerich <michael.hennerich@analog.com> Signed-off-by: Bryan Wu <cooloney@kernel.org>
Diffstat (limited to 'arch/blackfin/kernel')
-rw-r--r--arch/blackfin/kernel/bfin_dma_5xx.c26
-rw-r--r--arch/blackfin/kernel/bfin_gpio.c118
2 files changed, 138 insertions, 6 deletions
diff --git a/arch/blackfin/kernel/bfin_dma_5xx.c b/arch/blackfin/kernel/bfin_dma_5xx.c
index d54f19085f37..ad0e75845ac2 100644
--- a/arch/blackfin/kernel/bfin_dma_5xx.c
+++ b/arch/blackfin/kernel/bfin_dma_5xx.c
@@ -472,6 +472,32 @@ unsigned long get_dma_curr_addr(unsigned int channel)
}
EXPORT_SYMBOL(get_dma_curr_addr);
+#ifdef CONFIG_PM
+int blackfin_dma_suspend(void)
+{
+ int i;
+
+ for (i = 0; i < MAX_BLACKFIN_DMA_CHANNEL; i++) {
+ if (dma_ch[i].chan_status == DMA_CHANNEL_ENABLED) {
+ printk(KERN_ERR "DMA Channel %d failed to suspend\n", i);
+ return -EBUSY;
+ }
+
+ dma_ch[i].saved_peripheral_map = dma_ch[i].regs->peripheral_map;
+ }
+
+ return 0;
+}
+
+void blackfin_dma_resume(void)
+{
+ int i;
+
+ for (i = 0; i < MAX_BLACKFIN_DMA_CHANNEL; i++)
+ dma_ch[i].regs->peripheral_map = dma_ch[i].saved_peripheral_map;
+}
+#endif
+
static void *__dma_memcpy(void *dest, const void *src, size_t size)
{
int direction; /* 1 - address decrease, 0 - address increase */
diff --git a/arch/blackfin/kernel/bfin_gpio.c b/arch/blackfin/kernel/bfin_gpio.c
index b6d89d1644cc..ecbd141e0ef2 100644
--- a/arch/blackfin/kernel/bfin_gpio.c
+++ b/arch/blackfin/kernel/bfin_gpio.c
@@ -186,7 +186,10 @@ static struct str_ident {
char name[RESOURCE_LABEL_SIZE];
} str_ident[MAX_RESOURCES];
-#if defined(CONFIG_PM) && !defined(CONFIG_BF54x)
+#if defined(CONFIG_PM)
+#if defined(CONFIG_BF54x)
+static struct gpio_port_s gpio_bank_saved[gpio_bank(MAX_BLACKFIN_GPIOS)];
+#else
static unsigned short wakeup_map[gpio_bank(MAX_BLACKFIN_GPIOS)];
static unsigned char wakeup_flags_map[MAX_BLACKFIN_GPIOS];
static struct gpio_port_s gpio_bank_saved[gpio_bank(MAX_BLACKFIN_GPIOS)];
@@ -206,7 +209,7 @@ static unsigned int sic_iwr_irqs[gpio_bank(MAX_BLACKFIN_GPIOS)] = {IRQ_PORTF_INT
#ifdef BF561_FAMILY
static unsigned int sic_iwr_irqs[gpio_bank(MAX_BLACKFIN_GPIOS)] = {IRQ_PROG0_INTB, IRQ_PROG1_INTB, IRQ_PROG2_INTB};
#endif
-
+#endif
#endif /* CONFIG_PM */
#if defined(BF548_FAMILY)
@@ -667,7 +670,7 @@ static int bfin_gpio_wakeup_type(unsigned gpio, unsigned char type)
return 0;
}
-u32 bfin_pm_setup(void)
+u32 bfin_pm_standby_setup(void)
{
u16 bank, mask, i, gpio;
@@ -679,7 +682,7 @@ u32 bfin_pm_setup(void)
gpio_bankb[bank]->maskb = 0;
if (mask) {
-#ifdef BF537_FAMILY
+#if defined(BF527_FAMILY) || defined(BF537_FAMILY)
gpio_bank_saved[bank].fer = *port_fer[bank];
#endif
gpio_bank_saved[bank].inen = gpio_bankb[bank]->inen;
@@ -715,7 +718,7 @@ u32 bfin_pm_setup(void)
return 0;
}
-void bfin_pm_restore(void)
+void bfin_pm_standby_restore(void)
{
u16 bank, mask, i;
@@ -724,7 +727,7 @@ void bfin_pm_restore(void)
bank = gpio_bank(i);
if (mask) {
-#ifdef BF537_FAMILY
+#if defined(BF527_FAMILY) || defined(BF537_FAMILY)
*port_fer[bank] = gpio_bank_saved[bank].fer;
#endif
gpio_bankb[bank]->inen = gpio_bank_saved[bank].inen;
@@ -743,8 +746,111 @@ void bfin_pm_restore(void)
AWA_DUMMY_READ(maskb);
}
+void bfin_gpio_pm_hibernate_suspend(void)
+{
+ int i, bank;
+
+ for (i = 0; i < MAX_BLACKFIN_GPIOS; i += GPIO_BANKSIZE) {
+ bank = gpio_bank(i);
+
+#if defined(BF527_FAMILY) || defined(BF537_FAMILY)
+ gpio_bank_saved[bank].fer = *port_fer[bank];
+#ifdef BF527_FAMILY
+ gpio_bank_saved[bank].mux = *port_mux[bank];
+#else
+ if (bank == 0)
+ gpio_bank_saved[bank].mux = bfin_read_PORT_MUX();
+#endif
+#endif
+ gpio_bank_saved[bank].data = gpio_bankb[bank]->data;
+ gpio_bank_saved[bank].inen = gpio_bankb[bank]->inen;
+ gpio_bank_saved[bank].polar = gpio_bankb[bank]->polar;
+ gpio_bank_saved[bank].dir = gpio_bankb[bank]->dir;
+ gpio_bank_saved[bank].edge = gpio_bankb[bank]->edge;
+ gpio_bank_saved[bank].both = gpio_bankb[bank]->both;
+ gpio_bank_saved[bank].maska = gpio_bankb[bank]->maska;
+ }
+
+ AWA_DUMMY_READ(maska);
+}
+
+void bfin_gpio_pm_hibernate_restore(void)
+{
+ int i, bank;
+
+ for (i = 0; i < MAX_BLACKFIN_GPIOS; i += GPIO_BANKSIZE) {
+ bank = gpio_bank(i);
+
+#if defined(BF527_FAMILY) || defined(BF537_FAMILY)
+#ifdef BF527_FAMILY
+ *port_mux[bank] = gpio_bank_saved[bank].mux;
+#else
+ if (bank == 0)
+ bfin_write_PORT_MUX(gpio_bank_saved[bank].mux);
+#endif
+ *port_fer[bank] = gpio_bank_saved[bank].fer;
+#endif
+ gpio_bankb[bank]->inen = gpio_bank_saved[bank].inen;
+ gpio_bankb[bank]->dir = gpio_bank_saved[bank].dir;
+ gpio_bankb[bank]->polar = gpio_bank_saved[bank].polar;
+ gpio_bankb[bank]->edge = gpio_bank_saved[bank].edge;
+ gpio_bankb[bank]->both = gpio_bank_saved[bank].both;
+
+ gpio_bankb[bank]->data_set = gpio_bank_saved[bank].data
+ | gpio_bank_saved[bank].dir;
+
+ gpio_bankb[bank]->maska = gpio_bank_saved[bank].maska;
+ }
+ AWA_DUMMY_READ(maska);
+}
+
+
#endif
#else /* BF548_FAMILY */
+#ifdef CONFIG_PM
+
+u32 bfin_pm_standby_setup(void)
+{
+ return 0;
+}
+
+void bfin_pm_standby_restore(void)
+{
+
+}
+
+void bfin_gpio_pm_hibernate_suspend(void)
+{
+ int i, bank;
+
+ for (i = 0; i < MAX_BLACKFIN_GPIOS; i += GPIO_BANKSIZE) {
+ bank = gpio_bank(i);
+
+ gpio_bank_saved[bank].fer = gpio_array[bank]->port_fer;
+ gpio_bank_saved[bank].mux = gpio_array[bank]->port_mux;
+ gpio_bank_saved[bank].data = gpio_array[bank]->port_data;
+ gpio_bank_saved[bank].data = gpio_array[bank]->port_data;
+ gpio_bank_saved[bank].inen = gpio_array[bank]->port_inen;
+ gpio_bank_saved[bank].dir = gpio_array[bank]->port_dir_set;
+ }
+}
+
+void bfin_gpio_pm_hibernate_restore(void)
+{
+ int i, bank;
+
+ for (i = 0; i < MAX_BLACKFIN_GPIOS; i += GPIO_BANKSIZE) {
+ bank = gpio_bank(i);
+
+ gpio_array[bank]->port_mux = gpio_bank_saved[bank].mux;
+ gpio_array[bank]->port_fer = gpio_bank_saved[bank].fer;
+ gpio_array[bank]->port_inen = gpio_bank_saved[bank].inen;
+ gpio_array[bank]->port_dir_set = gpio_bank_saved[bank].dir;
+ gpio_array[bank]->port_set = gpio_bank_saved[bank].data
+ | gpio_bank_saved[bank].dir;
+ }
+}
+#endif
unsigned short get_gpio_dir(unsigned gpio)
{