static int tahvo_usb_set_host(struct usb_otg *otg, struct usb_bus *host)
{
struct tahvo_usb *tu = container_of(otg->phy, struct tahvo_usb, phy);
dev_dbg(&tu->pt_dev->dev, "%s %p\n", __func__, host);
mutex_lock(&tu->serialize);
if (host == NULL) {
if (tu->tahvo_mode == TAHVO_MODE_HOST)
tahvo_usb_power_off(tu);
otg->host = NULL;
mutex_unlock(&tu->serialize);
return 0;
}
if (tu->tahvo_mode == TAHVO_MODE_HOST) {
otg->host = NULL;
tahvo_usb_become_host(tu);
}
otg->host = host;
mutex_unlock(&tu->serialize);
return 0;
}
static int tahvo_usb_set_peripheral(struct usb_otg *otg,
struct usb_gadget *gadget)
{
struct tahvo_usb *tu = container_of(otg->phy, struct tahvo_usb, phy);
dev_dbg(&tu->pt_dev->dev, "%s %p\n", __func__, gadget);
mutex_lock(&tu->serialize);
if (!gadget) {
if (tu->tahvo_mode == TAHVO_MODE_PERIPHERAL)
tahvo_usb_power_off(tu);
tu->phy.otg->gadget = NULL;
mutex_unlock(&tu->serialize);
return 0;
}
tu->phy.otg->gadget = gadget;
if (tu->tahvo_mode == TAHVO_MODE_PERIPHERAL)
tahvo_usb_become_peripheral(tu);
mutex_unlock(&tu->serialize);
return 0;
}
static int tahvo_usb_set_peripheral(struct otg_transceiver *otg, struct usb_gadget *gadget)
{
struct tahvo_usb *tu = container_of(otg, struct tahvo_usb, otg);
dev_dbg(&tu->pt_dev->dev, "set_peripheral %p\n", gadget);
if (!otg)
return -ENODEV;
#if defined(CONFIG_USB_OTG) || defined(CONFIG_USB_GADGET_OMAP)
mutex_lock(&tu->serialize);
if (!gadget) {
if (TAHVO_MODE(tu) == TAHVO_MODE_PERIPHERAL)
tahvo_usb_power_off(tu);
tu->otg.gadget = NULL;
mutex_unlock(&tu->serialize);
return 0;
}
tu->otg.gadget = gadget;
if (TAHVO_MODE(tu) == TAHVO_MODE_PERIPHERAL)
tahvo_usb_become_peripheral(tu);
mutex_unlock(&tu->serialize);
#else
/* No gadget mode configured, so do not allow host controlled to be set */
return -EINVAL;
#endif
return 0;
}
static ssize_t otg_mode_store(struct device *device,
struct device_attribute *attr,
const char *buf, size_t count)
{
struct tahvo_usb *tu = dev_get_drvdata(device);
int r;
mutex_lock(&tu->serialize);
if (count >= 4 && strncmp(buf, "host", 4) == 0) {
if (tu->tahvo_mode == TAHVO_MODE_PERIPHERAL)
tahvo_usb_stop_peripheral(tu);
tu->tahvo_mode = TAHVO_MODE_HOST;
if (tu->phy.otg->host) {
dev_info(device, "HOST mode: host controller present\n");
tahvo_usb_become_host(tu);
} else {
dev_info(device, "HOST mode: no host controller, powering off\n");
tahvo_usb_power_off(tu);
}
r = strlen(buf);
} else if (count >= 10 && strncmp(buf, "peripheral", 10) == 0) {
if (tu->tahvo_mode == TAHVO_MODE_HOST)
tahvo_usb_stop_host(tu);
tu->tahvo_mode = TAHVO_MODE_PERIPHERAL;
if (tu->phy.otg->gadget) {
dev_info(device, "PERIPHERAL mode: gadget driver present\n");
tahvo_usb_become_peripheral(tu);
} else {
dev_info(device, "PERIPHERAL mode: no gadget driver, powering off\n");
tahvo_usb_power_off(tu);
}
r = strlen(buf);
} else {
r = -EINVAL;
}
mutex_unlock(&tu->serialize);
return r;
}
static ssize_t otg_mode_store(struct device *device,
struct device_attribute *attr,
const char *buf, size_t count)
{
struct tahvo_usb *tu = (struct tahvo_usb*) device->driver_data;
int r;
r = strlen(buf);
mutex_lock(&tu->serialize);
if (strncmp(buf, "host", 4) == 0) {
if (tu->tahvo_mode == TAHVO_MODE_PERIPHERAL)
tahvo_usb_stop_peripheral(tu);
tu->tahvo_mode = TAHVO_MODE_HOST;
if (tu->otg.host) {
printk(KERN_INFO "Selected HOST mode: host controller present.\n");
tahvo_usb_become_host(tu);
} else {
printk(KERN_INFO "Selected HOST mode: no host controller, powering off.\n");
tahvo_usb_power_off(tu);
}
} else if (strncmp(buf, "peripheral", 10) == 0) {
if (tu->tahvo_mode == TAHVO_MODE_HOST)
tahvo_usb_stop_host(tu);
tu->tahvo_mode = TAHVO_MODE_PERIPHERAL;
if (tu->otg.gadget) {
printk(KERN_INFO "Selected PERIPHERAL mode: gadget driver present.\n");
tahvo_usb_become_peripheral(tu);
} else {
printk(KERN_INFO "Selected PERIPHERAL mode: no gadget driver, powering off.\n");
tahvo_usb_power_off(tu);
}
} else
r = -EINVAL;
mutex_unlock(&tu->serialize);
return r;
}
static int tahvo_usb_set_host(struct otg_transceiver *otg, struct usb_bus *host)
{
struct tahvo_usb *tu = container_of(otg, struct tahvo_usb, otg);
u32 l;
dev_dbg(&tu->pt_dev->dev, "set_host %p\n", host);
if (otg == NULL)
return -ENODEV;
#if defined(CONFIG_USB_OTG) || !defined(CONFIG_USB_GADGET_OMAP)
mutex_lock(&tu->serialize);
if (host == NULL) {
if (TAHVO_MODE(tu) == TAHVO_MODE_HOST)
tahvo_usb_power_off(tu);
tu->otg.host = NULL;
mutex_unlock(&tu->serialize);
return 0;
}
l = omap_readl(OTG_SYSCON_1);
l &= ~(OTG_IDLE_EN | HST_IDLE_EN | DEV_IDLE_EN);
omap_writel(l, OTG_SYSCON_1);
if (TAHVO_MODE(tu) == TAHVO_MODE_HOST) {
tu->otg.host = NULL;
tahvo_usb_become_host(tu);
} else
host_suspend(tu);
tu->otg.host = host;
mutex_unlock(&tu->serialize);
#else
/* No host mode configured, so do not allow host controlled to be set */
return -EINVAL;
#endif
return 0;
}
static int tahvo_usb_probe(struct platform_device *pdev)
{
struct retu_dev *rdev = dev_get_drvdata(pdev->dev.parent);
struct tahvo_usb *tu;
int ret;
tu = devm_kzalloc(&pdev->dev, sizeof(*tu), GFP_KERNEL);
if (!tu)
return -ENOMEM;
tu->phy.otg = devm_kzalloc(&pdev->dev, sizeof(*tu->phy.otg),
GFP_KERNEL);
if (!tu->phy.otg)
return -ENOMEM;
tu->pt_dev = pdev;
/* Default mode */
#ifdef CONFIG_TAHVO_USB_HOST_BY_DEFAULT
tu->tahvo_mode = TAHVO_MODE_HOST;
#else
tu->tahvo_mode = TAHVO_MODE_PERIPHERAL;
#endif
mutex_init(&tu->serialize);
tu->ick = devm_clk_get(&pdev->dev, "usb_l4_ick");
if (!IS_ERR(tu->ick))
clk_enable(tu->ick);
/*
* Set initial state, so that we generate kevents only on state changes.
*/
tu->vbus_state = retu_read(rdev, TAHVO_REG_IDSR) & TAHVO_STAT_VBUS;
tu->extcon.name = DRIVER_NAME;
tu->extcon.supported_cable = tahvo_cable;
tu->extcon.dev.parent = &pdev->dev;
ret = extcon_dev_register(&tu->extcon);
if (ret) {
dev_err(&pdev->dev, "could not register extcon device: %d\n",
ret);
goto err_disable_clk;
}
/* Set the initial cable state. */
extcon_set_cable_state(&tu->extcon, "USB-HOST",
tu->tahvo_mode == TAHVO_MODE_HOST);
extcon_set_cable_state(&tu->extcon, "USB", tu->vbus_state);
/* Create OTG interface */
tahvo_usb_power_off(tu);
tu->phy.dev = &pdev->dev;
tu->phy.state = OTG_STATE_UNDEFINED;
tu->phy.label = DRIVER_NAME;
tu->phy.set_suspend = tahvo_usb_set_suspend;
tu->phy.otg->phy = &tu->phy;
tu->phy.otg->set_host = tahvo_usb_set_host;
tu->phy.otg->set_peripheral = tahvo_usb_set_peripheral;
ret = usb_add_phy(&tu->phy, USB_PHY_TYPE_USB2);
if (ret < 0) {
dev_err(&pdev->dev, "cannot register USB transceiver: %d\n",
ret);
goto err_extcon_unreg;
}
dev_set_drvdata(&pdev->dev, tu);
tu->irq = platform_get_irq(pdev, 0);
ret = request_threaded_irq(tu->irq, NULL, tahvo_usb_vbus_interrupt, 0,
"tahvo-vbus", tu);
if (ret) {
dev_err(&pdev->dev, "could not register tahvo-vbus irq: %d\n",
ret);
goto err_remove_phy;
}
/* Attributes */
ret = sysfs_create_group(&pdev->dev.kobj, &tahvo_attr_group);
if (ret) {
dev_err(&pdev->dev, "cannot create sysfs group: %d\n", ret);
goto err_free_irq;
}
return 0;
err_free_irq:
free_irq(tu->irq, tu);
err_remove_phy:
usb_remove_phy(&tu->phy);
err_extcon_unreg:
extcon_dev_unregister(&tu->extcon);
err_disable_clk:
if (!IS_ERR(tu->ick))
clk_disable(tu->ick);
return ret;
}
static int tahvo_usb_probe(struct device *dev)
{
struct tahvo_usb *tu;
int ret;
dev_dbg(dev, "probe\n");
/* Create driver data */
tu = kmalloc(sizeof(*tu), GFP_KERNEL);
if (!tu)
return -ENOMEM;
memset(tu, 0, sizeof(*tu));
tu->pt_dev = container_of(dev, struct platform_device, dev);
#ifdef CONFIG_USB_OTG
/* Default mode */
#ifdef CONFIG_CBUS_TAHVO_USB_HOST_BY_DEFAULT
tu->tahvo_mode = TAHVO_MODE_HOST;
#else
tu->tahvo_mode = TAHVO_MODE_PERIPHERAL;
#endif
#endif
INIT_WORK(&tu->irq_work, tahvo_usb_irq_work);
mutex_init(&tu->serialize);
/* Set initial state, so that we generate kevents only on
* state changes */
tu->vbus_state = tahvo_read_reg(TAHVO_REG_IDSR) & 0x01;
/* We cannot enable interrupt until omap_udc is initialized */
ret = tahvo_request_irq(TAHVO_INT_VBUSON, tahvo_usb_vbus_interrupt,
(unsigned long) tu, "vbus_interrupt");
if (ret != 0) {
kfree(tu);
printk(KERN_ERR "Could not register Tahvo interrupt for VBUS\n");
return ret;
}
/* Attributes */
ret = device_create_file(dev, &dev_attr_vbus_state);
#ifdef CONFIG_USB_OTG
ret |= device_create_file(dev, &dev_attr_otg_mode);
#endif
if (ret)
printk(KERN_ERR "attribute creation failed: %d\n", ret);
/* Create OTG interface */
tahvo_usb_power_off(tu);
tu->otg.state = OTG_STATE_UNDEFINED;
tu->otg.label = DRIVER_NAME;
tu->otg.set_host = tahvo_usb_set_host;
tu->otg.set_peripheral = tahvo_usb_set_peripheral;
tu->otg.set_power = tahvo_usb_set_power;
tu->otg.set_suspend = tahvo_usb_set_suspend;
tu->otg.start_srp = tahvo_usb_start_srp;
tu->otg.start_hnp = tahvo_usb_start_hnp;
ret = otg_set_transceiver(&tu->otg);
if (ret < 0) {
printk(KERN_ERR "Cannot register USB transceiver\n");
kfree(tu);
tahvo_free_irq(TAHVO_INT_VBUSON);
return ret;
}
dev->driver_data = tu;
/* Act upon current vbus state once at startup. A vbus state irq may or
* may not be generated in addition to this. */
schedule_work(&tu->irq_work);
return 0;
}
static int __init tahvo_usb_probe(struct platform_device *pdev)
{
struct tahvo_usb *tu;
struct device *dev = &pdev->dev;
int ret;
int irq;
dev_dbg(dev, "probe\n");
/* Create driver data */
tu = kzalloc(sizeof(*tu), GFP_KERNEL);
if (!tu)
return -ENOMEM;
tahvo_usb_device = tu;
tu->dev = dev;
tu->pt_dev = pdev;
#ifdef CONFIG_USB_OTG
/* Default mode */
#ifdef CONFIG_CBUS_TAHVO_USB_HOST_BY_DEFAULT
tu->tahvo_mode = TAHVO_MODE_HOST;
#else
tu->tahvo_mode = TAHVO_MODE_PERIPHERAL;
#endif
#endif
mutex_init(&tu->serialize);
tu->ick = clk_get(NULL, "usb_l4_ick");
if (IS_ERR(tu->ick)) {
dev_err(dev, "Failed to get usb_l4_ick\n");
ret = PTR_ERR(tu->ick);
goto err_free_tu;
}
clk_enable(tu->ick);
/* Set initial state, so that we generate kevents only on
* state changes */
tu->vbus_state = tahvo_read_reg(tu->dev, TAHVO_REG_IDSR) & 0x01;
irq = platform_get_irq(pdev, 0);
tu->irq = irq;
/* We cannot enable interrupt until omap_udc is initialized */
ret = request_threaded_irq(irq, NULL, tahvo_usb_vbus_interrupt,
IRQF_ONESHOT, "tahvo-vbus", tu);
if (ret != 0) {
printk(KERN_ERR "Could not register Tahvo interrupt for VBUS\n");
goto err_release_clk;
}
/* Attributes */
ret = device_create_file(dev, &dev_attr_vbus_state);
#ifdef CONFIG_USB_OTG
ret |= device_create_file(dev, &dev_attr_otg_mode);
#endif
if (ret)
printk(KERN_ERR "attribute creation failed: %d\n", ret);
/* Create OTG interface */
tahvo_usb_power_off(tu);
tu->otg.state = OTG_STATE_UNDEFINED;
tu->otg.label = DRIVER_NAME;
tu->otg.set_host = tahvo_usb_set_host;
tu->otg.set_peripheral = tahvo_usb_set_peripheral;
tu->otg.set_power = tahvo_usb_set_power;
tu->otg.set_suspend = tahvo_usb_set_suspend;
tu->otg.start_srp = tahvo_usb_start_srp;
tu->otg.start_hnp = tahvo_usb_start_hnp;
ret = otg_set_transceiver(&tu->otg);
if (ret < 0) {
printk(KERN_ERR "Cannot register USB transceiver\n");
goto err_free_irq;
}
dev_set_drvdata(dev, tu);
return 0;
err_free_irq:
free_irq(tu->irq, tu);
err_release_clk:
clk_disable(tu->ick);
clk_put(tu->ick);
err_free_tu:
kfree(tu);
tahvo_usb_device = NULL;
return ret;
}
