static int _od_suspend_noirq(struct device *dev)
{
struct platform_device *pdev = to_platform_device(dev);
struct omap_device *od = to_omap_device(pdev);
int ret;
/* Don't attempt late suspend on a driver that is not bound */
if (od->_driver_status != BUS_NOTIFY_BOUND_DRIVER)
return 0;
ret = pm_generic_suspend_noirq(dev);
if (!ret && !pm_runtime_status_suspended(dev)) {
if (pm_generic_runtime_suspend(dev) == 0) {
pm_runtime_set_suspended(dev);
omap_device_idle(pdev);
od->flags |= OMAP_DEVICE_SUSPENDED;
}
}
return ret;
}
/**
* omap_device_late_idle - idle devices without drivers
* @dev: struct device * associated with omap_device
* @data: unused
*
* Check the driver bound status of this device, and idle it
* if there is no driver attached.
*/
static int __init omap_device_late_idle(struct device *dev, void *data)
{
struct platform_device *pdev = to_platform_device(dev);
struct omap_device *od = to_omap_device(pdev);
if (!od)
return 0;
/*
* If omap_device state is enabled, but has no driver bound,
* idle it.
*/
if (od->_driver_status != BUS_NOTIFY_BOUND_DRIVER) {
if (od->_state == OMAP_DEVICE_STATE_ENABLED) {
dev_warn(dev, "%s: enabled but no driver. Idling\n",
__func__);
omap_device_idle(pdev);
}
}
return 0;
}
static int _od_resume_noirq(struct device *dev)
{
struct platform_device *pdev = to_platform_device(dev);
struct omap_device *od = to_omap_device(pdev);
if (od->flags & OMAP_DEVICE_SUSPENDED) {
od->flags &= ~OMAP_DEVICE_SUSPENDED;
omap_device_enable(pdev);
/*
* XXX: we run before core runtime pm has resumed itself. At
* this point in time, we just restore the runtime pm state and
* considering symmetric operations in resume, we donot expect
* to fail. If we failed, something changed in core runtime_pm
* framework OR some device driver messed things up, hence, WARN
*/
WARN(pm_runtime_set_active(dev),
"Could not set %s runtime state active\n", dev_name(dev));
pm_generic_runtime_resume(dev);
}
return pm_generic_resume_noirq(dev);
}
/**
* omap_device_align_pm_lat - activate/deactivate device to match wakeup lat lim
* @od: struct omap_device *
*
* When a device's maximum wakeup latency limit changes, call some of
* the .activate_func or .deactivate_func function pointers in the
* omap_device's pm_lats array to ensure that the device's maximum
* wakeup latency is less than or equal to the new latency limit.
* Intended to be called by OMAP PM code whenever a device's maximum
* wakeup latency limit changes (e.g., via
* omap_pm_set_dev_wakeup_lat()). Returns 0 if nothing needs to be
* done (e.g., if the omap_device is not currently idle, or if the
* wakeup latency is already current with the new limit) or passes
* along the return value of _omap_device_deactivate() or
* _omap_device_activate().
*/
int omap_device_align_pm_lat(struct platform_device *pdev,
u32 new_wakeup_lat_limit)
{
int ret = -EINVAL;
struct omap_device *od;
od = to_omap_device(pdev);
if (new_wakeup_lat_limit == od->dev_wakeup_lat)
return 0;
od->_dev_wakeup_lat_limit = new_wakeup_lat_limit;
if (od->_state != OMAP_DEVICE_STATE_IDLE)
return 0;
else if (new_wakeup_lat_limit > od->dev_wakeup_lat)
ret = _omap_device_deactivate(od, USE_WAKEUP_LAT);
else if (new_wakeup_lat_limit < od->dev_wakeup_lat)
ret = _omap_device_activate(od, USE_WAKEUP_LAT);
return ret;
}
/* TBD: Will be removed once we have irq-chaing mechanism */
static bool omap_uart_chk_wakeup(struct platform_device *pdev)
{
struct omap_uart_port_info *up = pdev->dev.platform_data;
struct omap_device *od;
u32 wkst = 0;
bool ret = false;
od = to_omap_device(pdev);
if (omap_hwmod_pad_get_wakeup_status(od->hwmods[0]) == true)
ret = true;
if (up->wk_st && up->wk_en && up->wk_mask) {
/* Check for normal UART wakeup (and clear it) */
wkst = __raw_readl(up->wk_st) & up->wk_mask;
if (wkst) {
__raw_writel(wkst, up->wk_st);
ret = true;
}
}
return ret;
}
static int _omap_mstandby_pm_notifier(struct notifier_block *self,
unsigned long action, void *dev)
{
struct omap_hwmod_list *oh_list_item = NULL;
struct platform_device *pdev;
struct omap_device *od;
switch (action) {
case PM_POST_SUSPEND:
list_for_each_entry(oh_list_item,
omap_hwmod_force_mstandby_list_get(), oh_list) {
pdev = to_platform_device(
omap_device_get_by_hwmod_name(
oh_list_item->oh->name));
od = to_omap_device(pdev);
if (od && od->_driver_status !=
BUS_NOTIFY_BOUND_DRIVER) {
omap_hwmod_enable(oh_list_item->oh);
omap_hwmod_idle(oh_list_item->oh);
}
}
}
static int _omap_device_notifier_call(struct notifier_block *nb,
unsigned long event, void *dev)
{
struct platform_device *pdev = to_platform_device(dev);
struct omap_device *od;
switch (event) {
case BUS_NOTIFY_DEL_DEVICE:
if (pdev->archdata.od)
omap_device_delete(pdev->archdata.od);
break;
case BUS_NOTIFY_ADD_DEVICE:
if (pdev->dev.of_node)
omap_device_build_from_dt(pdev);
/* fall through */
default:
od = to_omap_device(pdev);
if (od)
od->_driver_status = event;
}
return NOTIFY_DONE;
}
/**
* omap_device_shutdown - shut down an omap_device
* @od: struct omap_device * to shut down
*
* Shut down omap_device @od by calling all .deactivate_func() entries
* in the omap_device's pm_lats table and then shutting down all of
* the underlying omap_hwmods. Used when a device is being "removed"
* or a device driver is being unloaded. Returns -EINVAL if the
* omap_device is not currently enabled or idle, or passes along the
* return value of _omap_device_deactivate().
*/
int omap_device_shutdown(struct platform_device *pdev)
{
int ret, i;
struct omap_device *od;
od = to_omap_device(pdev);
if (od->_state != OMAP_DEVICE_STATE_ENABLED &&
od->_state != OMAP_DEVICE_STATE_IDLE) {
WARN(1, "omap_device: %s.%d: %s() called from invalid state %d\n",
od->pdev.name, od->pdev.id, __func__, od->_state);
return -EINVAL;
}
ret = _omap_device_deactivate(od, IGNORE_WAKEUP_LAT);
for (i = 0; i < od->hwmods_cnt; i++)
omap_hwmod_shutdown(od->hwmods[i]);
od->_state = OMAP_DEVICE_STATE_SHUTDOWN;
return ret;
}
static int serial_omap_probe(struct platform_device *pdev)
{
struct uart_omap_port *up = NULL;
struct resource *mem, *irq, *dma_tx, *dma_rx;
struct omap_uart_port_info *omap_up_info = pdev->dev.platform_data;
struct omap_device *od;
int ret = -ENOSPC;
mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
if (!mem) {
dev_err(&pdev->dev, "no mem resource?\n");
return -ENODEV;
}
irq = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
if (!irq) {
dev_err(&pdev->dev, "no irq resource?\n");
return -ENODEV;
}
if (!request_mem_region(mem->start, (mem->end - mem->start) + 1,
pdev->dev.driver->name)) {
dev_err(&pdev->dev, "memory region already claimed\n");
return -EBUSY;
}
dma_rx = platform_get_resource_byname(pdev, IORESOURCE_DMA, "rx");
if (!dma_rx) {
ret = -EINVAL;
goto err;
}
dma_tx = platform_get_resource_byname(pdev, IORESOURCE_DMA, "tx");
if (!dma_tx) {
ret = -EINVAL;
goto err;
}
up = kzalloc(sizeof(*up), GFP_KERNEL);
if (up == NULL) {
ret = -ENOMEM;
goto do_release_region;
}
sprintf(up->name, "OMAP UART%d", pdev->id);
up->pdev = pdev;
up->port.dev = &pdev->dev;
up->port.type = PORT_OMAP;
up->port.iotype = UPIO_MEM;
up->port.irq = irq->start;
up->port.regshift = 2;
up->port.fifosize = 64;
up->port.ops = &serial_omap_pops;
up->port.line = pdev->id;
up->port.mapbase = mem->start;
up->port.membase = ioremap(mem->start, mem->end - mem->start);
if (!up->port.membase) {
dev_err(&pdev->dev, "can't ioremap UART\n");
ret = -ENOMEM;
goto err1;
}
up->port.flags = omap_up_info->flags;
up->port.uartclk = omap_up_info->uartclk;
up->uart_dma.uart_base = mem->start;
up->errata = omap_up_info->errata;
up->enable_wakeup = omap_up_info->enable_wakeup;
up->wer = omap_up_info->wer;
up->chk_wakeup = omap_up_info->chk_wakeup;
up->wake_peer = omap_up_info->wake_peer;
up->rts_mux_driver_control = omap_up_info->rts_mux_driver_control;
up->rts_pullup_in_suspend = 0;
up->wer_restore = 0;
if (omap_up_info->use_dma) {
up->uart_dma.uart_dma_tx = dma_tx->start;
up->uart_dma.uart_dma_rx = dma_rx->start;
up->use_dma = 1;
up->uart_dma.rx_buf_size = omap_up_info->dma_rx_buf_size;
up->uart_dma.rx_timeout = omap_up_info->dma_rx_timeout;
up->uart_dma.rx_poll_rate = omap_up_info->dma_rx_poll_rate;
spin_lock_init(&(up->uart_dma.tx_lock));
spin_lock_init(&(up->uart_dma.rx_lock));
up->uart_dma.tx_dma_channel = OMAP_UART_DMA_CH_FREE;
up->uart_dma.rx_dma_channel = OMAP_UART_DMA_CH_FREE;
}
pm_runtime_use_autosuspend(&pdev->dev);
pm_runtime_set_autosuspend_delay(&pdev->dev,
omap_up_info->auto_sus_timeout);
if (device_may_wakeup(&pdev->dev))
pm_runtime_enable(&pdev->dev);
pm_runtime_irq_safe(&pdev->dev);
if (omap_up_info->console_uart) {
od = to_omap_device(up->pdev);
omap_hwmod_idle(od->hwmods[0]);
serial_omap_port_enable(up);
serial_omap_port_disable(up);
}
ui[pdev->id] = up;
serial_omap_add_console_port(up);
ret = uart_add_one_port(&serial_omap_reg, &up->port);
if (ret != 0)
goto err1;
dev_set_drvdata(&pdev->dev, up);
platform_set_drvdata(pdev, up);
return 0;
err:
dev_err(&pdev->dev, "[UART%d]: failure [%s]: %d\n",
pdev->id, __func__, ret);
err1:
kfree(up);
do_release_region:
release_mem_region(mem->start, (mem->end - mem->start) + 1);
return ret;
}
static struct omap_hwmod_mux_info * __init
omap_hwmod_mux_array_init(struct platform_device *pdev,
const struct omap_device_pad *bpads[],
int *nr_pads,
const enum usbhs_omap_port_mode *port_mode)
{
struct omap_device_pad *pads;
struct omap_hwmod_mux_info *hmux;
struct omap_device *od;
struct omap_hwmod *uhh_hwm;
size_t npads;
u32 i, k, j;
for (i = 0, npads = 0; i < OMAP3_HS_USB_PORTS; i++)
npads += nr_pads[i];
pads = kmalloc(sizeof(struct omap_device_pad)*npads, GFP_KERNEL);
if (!pads) {
pr_err("%s: Could not allocate device mux entry\n", __func__);
return NULL;
}
for (i = 0, k = 0; i < OMAP3_HS_USB_PORTS; i++)
if (nr_pads[i]) {
memcpy(pads + k, bpads[i],
sizeof(struct omap_device_pad) * nr_pads[i]);
k += nr_pads[i];
}
hmux = omap_hwmod_mux_init(pads, npads);
if (!pdev)
goto end;
od = to_omap_device(pdev);
uhh_hwm = od->hwmods[0];
if (!uhh_hwm)
goto end;
uhh_hwm->mux = hmux;
for (i = 0, k = 0; i < OMAP3_HS_USB_PORTS; i++) {
switch (port_mode[i]) {
case OMAP_EHCI_PORT_MODE_PHY:
case OMAP_EHCI_PORT_MODE_TLL:
case OMAP_EHCI_PORT_MODE_HSIC:
for (j = 0; j < nr_pads[i]; j++)
omap_hwmod_pad_wakeup_handler(uhh_hwm, k + j,
usbhs_wakeup_handler);
break;
case OMAP_OHCI_PORT_MODE_PHY_6PIN_DATSE0:
case OMAP_OHCI_PORT_MODE_PHY_6PIN_DPDM:
case OMAP_OHCI_PORT_MODE_TLL_6PIN_DATSE0:
case OMAP_OHCI_PORT_MODE_TLL_6PIN_DPDM:
case OMAP_OHCI_PORT_MODE_PHY_4PIN_DPDM:
case OMAP_OHCI_PORT_MODE_TLL_4PIN_DPDM:
case OMAP_OHCI_PORT_MODE_PHY_3PIN_DATSE0:
case OMAP_OHCI_PORT_MODE_TLL_3PIN_DATSE0:
case OMAP_OHCI_PORT_MODE_TLL_2PIN_DATSE0:
case OMAP_OHCI_PORT_MODE_TLL_2PIN_DPDM:
for (j = 0; j < nr_pads[i]; j++)
omap_hwmod_pad_wakeup_handler(uhh_hwm, k + j,
usbhs_wakeup_handler);
break;
case OMAP_USBHS_PORT_MODE_UNUSED:
default:
break;
}
k += nr_pads[i];
}
end:
kfree(pads);
return hmux;
}