/**
* ssp_save_state - save the SSP configuration
* @ssp: pointer to structure to save SSP configuration
*
* Save the configured SSP state for suspend.
*/
void ssp_save_state(struct ssp_dev *dev, struct ssp_state *ssp)
{
ssp->cr0 = SSCR0_P(dev->port);
ssp->cr1 = SSCR1_P(dev->port);
ssp->to = SSTO_P(dev->port);
ssp->psp = SSPSP_P(dev->port);
SSCR0_P(dev->port) &= ~SSCR0_SSE;
}
/**
* ssp_restore_state - restore a previously saved SSP configuration
* @ssp: pointer to configuration saved by ssp_save_state
*
* Restore the SSP configuration saved previously by ssp_save_state.
*/
void ssp_restore_state(struct ssp_dev *dev, struct ssp_state *ssp)
{
SSSR_P(dev->port) = SSSR_ROR | SSSR_TUR | SSSR_BCE;
SSCR0_P(dev->port) = ssp->cr0 & ~SSCR0_SSE;
SSCR1_P(dev->port) = ssp->cr1;
SSTO_P(dev->port) = ssp->to;
SSPSP_P(dev->port) = ssp->psp;
SSCR0_P(dev->port) = ssp->cr0;
}
/**
* ssp_exit - undo the effects of ssp_init
*
* release and free resources for the SSP port.
*/
void ssp_exit(struct ssp_dev *dev)
{
mutex_lock(&mutex);
SSCR0_P(dev->port) &= ~SSCR0_SSE;
if (dev->port > PXA_SSP_PORTS || dev->port == 0) {
printk(KERN_WARNING "SSP: tried to close invalid port\n");
return;
}
pxa_set_cken(ssp_info[dev->port-1].clock, 0);
if (dev->irq)
free_irq(dev->irq, dev);
release_mem_region(__PREG(SSCR0_P(dev->port)), 0x2c);
use_count[dev->port - 1]--;
mutex_unlock(&mutex);
}
/**
* ssp_init - setup the SSP port
*
* initialise and claim resources for the SSP port.
*
* Returns:
* %-ENODEV if the SSP port is unavailable
* %-EBUSY if the resources are already in use
* %0 on success
*/
int ssp_init(struct ssp_dev *dev, u32 port, u32 init_flags)
{
int ret;
if (port > PXA_SSP_PORTS || port == 0)
return -ENODEV;
mutex_lock(&mutex);
if (use_count[port - 1]) {
mutex_unlock(&mutex);
return -EBUSY;
}
use_count[port - 1]++;
if (!request_mem_region(__PREG(SSCR0_P(port)), 0x2c, "SSP")) {
use_count[port - 1]--;
mutex_unlock(&mutex);
return -EBUSY;
}
dev->port = port;
/* do we need to get irq */
if (!(init_flags & SSP_NO_IRQ)) {
ret = request_irq(ssp_info[port-1].irq, ssp_interrupt,
0, "SSP", dev);
if (ret)
goto out_region;
dev->irq = ssp_info[port-1].irq;
} else
dev->irq = 0;
/* turn on SSP port clock */
pxa_set_cken(ssp_info[port-1].clock, 1);
mutex_unlock(&mutex);
return 0;
out_region:
release_mem_region(__PREG(SSCR0_P(port)), 0x2c);
use_count[port - 1]--;
mutex_unlock(&mutex);
return ret;
}
/**
* ssp_config - configure SSP port settings
* @mode: port operating mode
* @flags: port config flags
* @psp_flags: port PSP config flags
* @speed: port speed
*
* Port MUST be disabled by ssp_disable before making any config changes.
*/
int ssp_config(struct ssp_dev *dev, u32 mode, u32 flags, u32 psp_flags, u32 speed)
{
dev->mode = mode;
dev->flags = flags;
dev->psp_flags = psp_flags;
dev->speed = speed;
/* set up port type, speed, port settings */
SSCR0_P(dev->port) = (dev->speed | dev->mode);
SSCR1_P(dev->port) = dev->flags;
SSPSP_P(dev->port) = dev->psp_flags;
return 0;
}
[2] = {
.name = "smc91x-attrib",
.start = 0x0e000000,
.end = 0x0e0fffff,
.flags = IORESOURCE_MEM,
},
};
/* ADS7846 is connected through SSP ... and if your board has J5 populated,
* you can select it to replace the ucb1400 by switching the touchscreen cable
* (to J5) and poking board registers (as done below). Else it's only useful
* for the temperature sensors.
*/
static struct resource pxa_ssp_resources[] = {
[0] = {
.start = __PREG(SSCR0_P(1)),
.end = __PREG(SSCR0_P(1)) + 0x14,
.flags = IORESOURCE_MEM,
},
[1] = {
.start = IRQ_SSP,
.end = IRQ_SSP,
.flags = IORESOURCE_IRQ,
},
};
static struct pxa2xx_spi_master pxa_ssp_master_info = {
.ssp_type = PXA25x_SSP,
.clock_enable = CKEN_SSP,
.num_chipselect = 0,
};
/**
* ssp_disable - shut down the SSP port
*
* Turn off the SSP port, optionally powering it down.
*/
void ssp_disable(struct ssp_dev *dev)
{
SSCR0_P(dev->port) &= ~SSCR0_SSE;
}
/**
* ssp_enable - enable the SSP port
*
* Turn on the SSP port.
*/
void ssp_enable(struct ssp_dev *dev)
{
SSCR0_P(dev->port) |= SSCR0_SSE;
}
