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STM32 power management update

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git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@4848 42af7a65-404d-4744-a932-0658087f49c3
This commit is contained in:
patacongo 2012-06-18 14:45:34 +00:00
parent 9dc0086d0f
commit 006769dd2d
1 changed files with 182 additions and 23 deletions
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205
configs/stm3210e-eval/src/up_lcd.c
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@ -49,7 +49,7 @@
* Omitting the above (or setting them to "n") enables support for the LCD. Setting
* any of the above to "y" will disable support for the corresponding LCD.
*/
/**************************************************************************************
* Included Files
**************************************************************************************/
@ -68,6 +68,7 @@
#include <nuttx/lcd/lcd.h>
#include <arch/board/board.h>
#include <nuttx/power/pm.h>
#include "up_arch.h"
#include "stm32.h"
@ -403,6 +404,13 @@ static int stm3210e_setpower(struct lcd_dev_s *dev, int power);
static int stm3210e_getcontrast(struct lcd_dev_s *dev);
static int stm3210e_setcontrast(struct lcd_dev_s *dev, unsigned int contrast);
/* LCD Power Management */
#ifdef CONFIG_PM
static void stm3210e_pm_notify(struct pm_callback_s *cb, enum pm_state_e pmstate);
static int stm3210e_pm_prepare(struct pm_callback_s *cb, enum pm_state_e pmstate);
#endif
/* Initialization */
static inline void stm3210e_lcdinitialize(void);
@ -441,7 +449,7 @@ static const struct fb_videoinfo_s g_videoinfo =
/* This is the standard, NuttX Plane information object */
static const struct lcd_planeinfo_s g_planeinfo =
static const struct lcd_planeinfo_s g_planeinfo =
{
.putrun = stm3210e_putrun, /* Put a run into LCD memory */
.getrun = stm3210e_getrun, /* Get a run from LCD memory */
@ -451,12 +459,12 @@ static const struct lcd_planeinfo_s g_planeinfo =
/* This is the standard, NuttX LCD driver object */
static struct stm3210e_dev_s g_lcddev =
static struct stm3210e_dev_s g_lcddev =
{
.dev =
{
/* LCD Configuration */
.getvideoinfo = stm3210e_getvideoinfo,
.getplaneinfo = stm3210e_getplaneinfo,
@ -472,6 +480,15 @@ static struct stm3210e_dev_s g_lcddev =
},
};
#ifdef CONFIG_PM
static struct pm_callback_s g_lcdcb =
{
.notify = stm3210e_pm_notify,
.prepare = stm3210e_pm_prepare,
};
#endif
/**************************************************************************************
* Private Functions
**************************************************************************************/
@ -580,7 +597,7 @@ static void stm3210e_readnosetup(FAR uint16_t *accum)
* Red and green appear to be swapped on read-back as well
* - R61580: There is a 16-bit (1 pixel) shift in the returned data.
* All colors in the normal order
* - AM240320: Unknown -- assuming colors are in the color order
* - AM240320: Unknown -- assuming colors are in the color order
*
**************************************************************************************/
@ -716,7 +733,7 @@ static int stm3210e_putrun(fb_coord_t row, fb_coord_t col, FAR const uint8_t *bu
{
FAR const uint16_t *src = (FAR const uint16_t*)buffer;
int i;
/* Buffer must be provided and aligned to a 16-bit address boundary */
lcddbg("row: %d col: %d npixels: %d\n", row, col, npixels);
@ -768,7 +785,7 @@ static int stm3210e_putrun(fb_coord_t row, fb_coord_t col, FAR const uint8_t *bu
col = (STM3210E_XRES-1) - col;
row = (STM3210E_YRES-1) - row;
/* Then write the GRAM data, manually incrementing Y (which is col) */
for (i = 0; i < npixels; i++)
@ -809,7 +826,7 @@ static int stm3210e_getrun(fb_coord_t row, fb_coord_t col, FAR uint8_t *buffer,
uint16_t (*readgram)(FAR uint16_t *accum);
uint16_t accum;
int i;
/* Buffer must be provided and aligned to a 16-bit address boundary */
lcddbg("row: %d col: %d npixels: %d\n", row, col, npixels);
@ -843,7 +860,7 @@ static int stm3210e_getrun(fb_coord_t row, fb_coord_t col, FAR uint8_t *buffer,
default: /* Shouldn't happen */
return -ENOSYS;
}
/* Read the run from GRAM. */
#ifdef CONFIG_LCD_LANDSCAPE
@ -896,7 +913,7 @@ static int stm3210e_getrun(fb_coord_t row, fb_coord_t col, FAR uint8_t *buffer,
col = (STM3210E_XRES-1) - col;
row = (STM3210E_YRES-1) - row;
/* Then write the GRAM data, manually incrementing Y (which is col) */
for (i = 0; i < npixels; i++)
@ -980,7 +997,7 @@ static int stm3210e_poweroff(void)
{
/* Turn the display off */
stm3210e_writereg(LCD_REG_7, 0);
stm3210e_writereg(LCD_REG_7, 0);
/* Disable timer 1 clocking */
@ -1022,8 +1039,7 @@ static int stm3210e_setpower(struct lcd_dev_s *dev, int power)
if (power > 0)
{
#ifdef CONFIG_LCD_BACKLIGHT
#ifdef CONFIG_LCD_PWM
#if defined(CONFIG_LCD_BACKLIGHT) && defined(CONFIG_LCD_PWM)
uint32_t frac;
uint32_t duty;
@ -1052,12 +1068,12 @@ static int stm3210e_setpower(struct lcd_dev_s *dev, int power)
{
duty--;
}
putreg16((uint16_t)duty, STM32_TIM1_CCR1);
#else
/* Turn the backlight on */
stm32_gpiowrite(GPIO_LCD_BACKLIGHT, true);
#endif
#endif
/* Then turn the display on */
@ -1110,6 +1126,133 @@ static int stm3210e_setcontrast(struct lcd_dev_s *dev, unsigned int contrast)
return -ENOSYS;
}
/****************************************************************************
* Name: stm3210e_pm_notify
*
* Description:
* Notify the driver of new power state. This callback is called after
* all drivers have had the opportunity to prepare for the new power state.
*
* Input Parameters:
*
* cb - Returned to the driver. The driver version of the callback
* strucure may include additional, driver-specific state data at
* the end of the structure.
*
* pmstate - Identifies the new PM state
*
* Returned Value:
* None - The driver already agreed to transition to the low power
* consumption state when when it returned OK to the prepare() call.
*
*
****************************************************************************/
#ifdef CONFIG_PM
static void stm3210e_pm_notify(struct pm_callback_s *cb , enum pm_state_e pmstate)
{
#ifdef CONFIG_LCD_PWM
uint32_t frac;
uint32_t duty;
#endif
switch (pmstate)
{
case(PM_NORMAL):
{
/* Restore normal LCD operation */
#ifdef CONFIG_LCD_PWM
frac = (g_lcddev.power << 16) / CONFIG_LCD_MAXPOWER;
duty = (g_lcddev.reload * frac) >> 16;
if (duty > 0)
{
duty--;
}
putreg16((uint16_t)duty, STM32_TIM1_CCR1);
#endif
}
break;
case(PM_IDLE):
{
/* Entering IDLE mode - Turn display off */
#ifdef CONFIG_LCD_PWM
lldbg("power:%d \n", g_lcddev.power);
putreg16(0, STM32_TIM1_CCR1);
#endif
}
break;
case(PM_STANDBY):
{
/* Entering STANDBY mode - Logic for PM_STANDBY goes here */
}
break;
case(PM_SLEEP):
{
/* Entering SLEEP mode - Logic for PM_SLEEP goes here */
}
break;
default:
{
/* Should not get here */
}
break;
}
}
#endif
/****************************************************************************
* Name: stm3210e_pm_prepare
*
* Description:
* Request the driver to prepare for a new power state. This is a warning
* that the system is about to enter into a new power state. The driver
* should begin whatever operations that may be required to enter power
* state. The driver may abort the state change mode by returning a
* non-zero value from the callback function.
*
* Input Parameters:
*
* cb - Returned to the driver. The driver version of the callback
* strucure may include additional, driver-specific state data at
* the end of the structure.
*
* pmstate - Identifies the new PM state
*
* Returned Value:
* Zero - (OK) means the event was successfully processed and that the
* driver is prepared for the PM state change.
*
* Non-zero - means that the driver is not prepared to perform the tasks
* needed achieve this power setting and will cause the state
* change to be aborted. NOTE: The prepare() method will also
* be called when reverting from lower back to higher power
* consumption modes (say because another driver refused a
* lower power state change). Drivers are not permitted to
* return non-zero values when reverting back to higher power
* consumption modes!
*
*
****************************************************************************/
#ifdef CONFIG_PM
static int stm3210e_pm_prepare(struct pm_callback_s *cb , enum pm_state_e pmstate)
{
/* No preparation to change power modes is required by the LCD driver. We always
* accept the state change by returning OK.
*/
return OK;
}
#endif
/**************************************************************************************
* Name: stm3210e_lcdinitialize
*
@ -1216,13 +1359,13 @@ static inline void stm3210e_lcdinitialize(void)
/* Panel Control */
stm3210e_writereg(LCD_REG_144, 0x0010);
stm3210e_writereg(LCD_REG_144, 0x0010);
stm3210e_writereg(LCD_REG_146, 0x0000);
stm3210e_writereg(LCD_REG_147, 0x0003);
stm3210e_writereg(LCD_REG_149, 0x0110);
stm3210e_writereg(LCD_REG_151, 0x0000);
stm3210e_writereg(LCD_REG_152, 0x0000);
/* Set GRAM write direction and BGR=1
* I/D=01 (Horizontal : increment, Vertical : decrement)
* AM=1 (address is updated in vertical writing direction)
@ -1309,6 +1452,8 @@ static inline void stm3210e_lcdinitialize(void)
#endif
{
#ifndef CONFIG_STM32_AM240320_DISABLE
/* Set the LCD type for the AM240320 */
g_lcddev.type = LCD_TYPE_AM240320;
lcddbg("LCD type: %d\n", g_lcddev.type);
@ -1361,7 +1506,7 @@ static inline void stm3210e_lcdinitialize(void)
stm3210e_writereg(LCD_REG_57, 0x0007);
stm3210e_writereg(LCD_REG_60, 0x0600);
stm3210e_writereg(LCD_REG_61, 0x020b);
/* Set GRAM area */
stm3210e_writereg(LCD_REG_80, 0x0000); /* Horizontal GRAM Start Address */
@ -1451,9 +1596,9 @@ static void stm3210e_backlight(void)
{
reload = 65535;
}
g_lcddev.reload = reload;
/* Configure PA8 as TIM1 CH1 output */
stm32_configgpio(GPIO_TIM1_CH1OUT);
@ -1507,7 +1652,7 @@ static void stm3210e_backlight(void)
cr2 = getreg16(STM32_TIM1_CR2);
/* Select the Output Compare Mode Bits */
ccmr = getreg16(STM32_TIM1_CCMR1);
ccmr &= ATIM_CCMR1_OC1M_MASK;
ccmr |= (ATIM_CCMR_MODE_PWM1 << ATIM_CCMR1_OC1M_SHIFT);
@ -1586,8 +1731,22 @@ static void stm3210e_backlight(void)
int up_lcdinitialize(void)
{
#ifdef CONFIG_PM
int ret;
#endif
gvdbg("Initializing\n");
/* Register to receive power management callbacks */
#ifdef CONFIG_PM
ret = pm_register(&g_lcdcb);
if (ret =! OK)
{
lcddbg("ERROR: pm_register failed: %d\n", ret);
}
#endif
/* Configure GPIO pins and configure the FSMC to support the LCD */
stm32_selectlcd();
@ -1650,12 +1809,12 @@ void up_lcduninitialize(void)
void stm3210e_lcdclear(uint16_t color)
{
uint32_t i = 0;
stm3210e_setcursor(0, STM3210E_XRES-1);
stm3210e_setcursor(0, STM3210E_XRES-1);
stm3210e_gramselect();
for (i = 0; i < STM3210E_XRES * STM3210E_YRES; i++)
{
LCD->value = color;
}
}
}