void ezx_i2c_pm_resume(void)
{
/* enable clocks */
CKEN |= CKEN14_I2C;
set_GPIO_mode(117 | GPIO_ALT_FN_1_IN);
set_GPIO_mode(118 | GPIO_ALT_FN_1_IN);
/* enable irqs */
enable_irq(i2c_pxa_data.irq);
/* disable unit */
_ICR(adap) &= ~ICR_IUE;
/* reset the unit */
_ICR(adap) |= ICR_UR;
udelay(100);
_ICR(adap) |= ICR_FM;
/* disable unit */
_ICR(adap) &= ~ICR_IUE;
/* XXX: I2C_PXA_SLAVE_ADDR == I2C_PXA_PWR_SLAVE_ADDR ??? */
/* set our slave address */
_ISAR(adap) = I2C_PXA_SLAVE_ADDR;
/* set control register values */
_ICR(adap) = I2C_ICR_INIT;
/* set clear interrupt bits */
_ISR(adap) = I2C_ISR_INIT;
/* enable unit */
_ICR(adap) |= ICR_IUE;
udelay(100);
}
static void i2c_pxa_reset(struct pxa_i2c *i2c)
{
pr_debug("Resetting I2C Controller Unit\n");
/* abort any transfer currently under way */
i2c_pxa_abort(i2c);
/* reset according to 9.8 */
writel(ICR_UR, _ICR(i2c));
writel(I2C_ISR_INIT, _ISR(i2c));
writel(readl(_ICR(i2c)) & ~ICR_UR, _ICR(i2c));
writel(i2c->slave_addr, _ISAR(i2c));
/* set control register values */
writel(I2C_ICR_INIT, _ICR(i2c));
#ifdef CONFIG_I2C_PXA_SLAVE
dev_info(&i2c->adap.dev, "Enabling slave mode\n");
writel(readl(_ICR(i2c)) | ICR_SADIE | ICR_ALDIE | ICR_SSDIE, _ICR(i2c));
#endif
i2c_pxa_set_slave(i2c, 0);
/* enable unit */
writel(readl(_ICR(i2c)) | ICR_IUE, _ICR(i2c));
udelay(100);
}
static void i2c_pxa_reset(struct i2c_algo_pxa_data *adap)
{
/* set the global I2C clocks on */
CKEN |= CKEN14_I2C;
set_GPIO_mode(117 | GPIO_ALT_FN_1_IN);
set_GPIO_mode(118 | GPIO_ALT_FN_1_IN);
#ifdef CONFIG_POWER_I2C
/* set the global PWR_I2C clock on */
CKEN |= CKEN15_PWRI2C;
/* Enable PI2C controller PWR_SCL and PWR_SDA */
PCFR |= PCFR_PI2CEN;
/* Setup GPIO3 and GPIO4 to ALT_FN1_IN (PWR_SCL and PWR_SDA) */
set_GPIO_mode(3 | GPIO_ALT_FN_1_IN);
set_GPIO_mode(4 | GPIO_ALT_FN_1_IN);
#endif
/* disable unit */
_ICR(adap) &= ~ICR_IUE;
/* reset the unit */
_ICR(adap) |= ICR_UR;
udelay(100);
_ICR(adap) |= ICR_FM;
/* disable unit */
_ICR(adap) &= ~ICR_IUE;
/* XXX: I2C_PXA_SLAVE_ADDR == I2C_PXA_PWR_SLAVE_ADDR ??? */
/* set our slave address */
_ISAR(adap) = I2C_PXA_SLAVE_ADDR;
/* set control register values */
_ICR(adap) = I2C_ICR_INIT;
/* set clear interrupt bits */
_ISR(adap) = I2C_ISR_INIT;
/* enable unit */
_ICR(adap) |= ICR_IUE;
udelay(100);
}
static int ezx_i2c_pm_callback(struct pm_dev *pm_dev, pm_request_t req, void *data)
{
switch(req)
{
case PM_SUSPEND:
/* disable IRQs */
if (i2c_pxa_data.irq)
disable_irq(i2c_pxa_data.irq);
/* disable PI2C Controller */
PCFR &= ~PCFR_PI2CEN;
/* disable clocks */
CKEN &= ~CKEN14_I2C;
#ifdef CONFIG_POWER_I2C
if (i2c_pxa_pwr_data.irq)
disable_irq(i2c_pxa_pwr_data.irq);
/* disable PI2C Controller */
PCFR &= ~PCFR_PI2CEN;
CKEN &= ~CKEN15_PWRI2C;
#endif
break;
case PM_RESUME:
/* enable clocks */
CKEN |= CKEN14_I2C;
set_GPIO_mode(117 | GPIO_ALT_FN_1_IN);
set_GPIO_mode(118 | GPIO_ALT_FN_1_IN);
/* enable irqs */
enable_irq(i2c_pxa_data.irq);
#ifdef CONFIG_POWER_I2C
/* set the global PWR_I2C clock on */
CKEN |= CKEN15_PWRI2C;
/* Enable PI2C controller PWR_SCL and PWR_SDA */
PCFR |= PCFR_PI2CEN;
set_GPIO_mode(3 | GPIO_ALT_FN_1_IN);
set_GPIO_mode(4 | GPIO_ALT_FN_1_IN);
enable_irq(i2c_pxa_pwr_data.irq);
#endif
/* disable unit */
_ICR(adap) &= ~ICR_IUE;
/* reset the unit */
_ICR(adap) |= ICR_UR;
udelay(100);
_ICR(adap) |= ICR_FM;
/* disable unit */
_ICR(adap) &= ~ICR_IUE;
/* XXX: I2C_PXA_SLAVE_ADDR == I2C_PXA_PWR_SLAVE_ADDR ??? */
/* set our slave address */
_ISAR(adap) = I2C_PXA_SLAVE_ADDR;
/* set control register values */
_ICR(adap) = I2C_ICR_INIT;
/* set clear interrupt bits */
_ISR(adap) = I2C_ISR_INIT;
/* enable unit */
_ICR(adap) |= ICR_IUE;
udelay(100);
break;
}
return 0;
}