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Blackfin arch: Functional power management support

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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>
This commit is contained in:
Michael Hennerich
2008-07-19 16:57:32 +08:00
committed by Bryan Wu
parent 4f13f548ce
commit 1efc80b53e
9 changed files with 1036 additions and 122 deletions
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118
arch/blackfin/kernel/bfin_gpio.c
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@@ -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)
{