#include <linux/usb/atmel_usba_udc.h>
#include <linux/delay.h>
#include <linux/platform_data/atmel.h>
+#include <linux/of.h>
+#include <linux/of_gpio.h>
#include <asm/gpio.h>
#include "atmel_usba_udc.h"
-
-static struct usba_udc the_udc;
-static struct usba_ep *usba_ep;
-
#ifdef CONFIG_USB_GADGET_DEBUG_FS
#include <linux/debugfs.h>
#include <linux/uaccess.h>
}
-static struct usba_udc the_udc = {
- .gadget = {
- .ops = &usba_udc_ops,
- .ep_list = LIST_HEAD_INIT(the_udc.gadget.ep_list),
- .max_speed = USB_SPEED_HIGH,
- .name = "atmel_usba_udc",
- .dev = {
- .init_name = "gadget",
- .release = nop_release,
- },
+struct usb_gadget usba_gadget_template = {
+ .ops = &usba_udc_ops,
+ .max_speed = USB_SPEED_HIGH,
+ .name = "atmel_usba_udc",
+ .dev = {
+ .init_name = "gadget",
+ .release = nop_release,
},
};
* Test_SE0_NAK: Force high-speed mode and set up ep0
* for Bulk IN transfers
*/
- ep = &usba_ep[0];
+ ep = &udc->usba_ep[0];
usba_writel(udc, TST,
USBA_BF(SPEED_CFG, USBA_SPEED_CFG_FORCE_HIGH));
usba_ep_writel(ep, CFG,
break;
case 0x0400:
/* Test_Packet */
- ep = &usba_ep[0];
+ ep = &udc->usba_ep[0];
usba_ep_writel(ep, CFG,
USBA_BF(EPT_SIZE, USBA_EPT_SIZE_64)
| USBA_EPT_DIR_IN
for (i = 1; i < USBA_NR_ENDPOINTS; i++)
if (dma_status & (1 << i))
- usba_dma_irq(udc, &usba_ep[i]);
+ usba_dma_irq(udc, &udc->usba_ep[i]);
}
ep_status = USBA_BFEXT(EPT_INT, status);
for (i = 0; i < USBA_NR_ENDPOINTS; i++)
if (ep_status & (1 << i)) {
- if (ep_is_control(&usba_ep[i]))
- usba_control_irq(udc, &usba_ep[i]);
+ if (ep_is_control(&udc->usba_ep[i]))
+ usba_control_irq(udc, &udc->usba_ep[i]);
else
- usba_ep_irq(udc, &usba_ep[i]);
+ usba_ep_irq(udc, &udc->usba_ep[i]);
}
}
DBG(DBG_BUS, "%s bus reset detected\n",
usb_speed_string(udc->gadget.speed));
- ep0 = &usba_ep[0];
+ ep0 = &udc->usba_ep[0];
ep0->ep.desc = &usba_ep0_desc;
ep0->state = WAIT_FOR_SETUP;
usba_ep_writel(ep0, CFG,
return 0;
}
-static int __init usba_udc_probe(struct platform_device *pdev)
+#ifdef CONFIG_OF
+static struct usba_ep * atmel_udc_of_init(struct platform_device *pdev,
+ struct usba_udc *udc)
+{
+ u32 val;
+ const char *name;
+ enum of_gpio_flags flags;
+ struct device_node *np = pdev->dev.of_node;
+ struct device_node *pp;
+ int i, ret;
+ struct usba_ep *eps, *ep;
+
+ udc->num_ep = 0;
+
+ udc->vbus_pin = of_get_named_gpio_flags(np, "atmel,vbus-gpio", 0,
+ &flags);
+ udc->vbus_pin_inverted = (flags & OF_GPIO_ACTIVE_LOW) ? 1 : 0;
+
+ pp = NULL;
+ while ((pp = of_get_next_child(np, pp)))
+ udc->num_ep++;
+
+ eps = devm_kzalloc(&pdev->dev, sizeof(struct usba_ep) * udc->num_ep,
+ GFP_KERNEL);
+ if (!eps)
+ return ERR_PTR(-ENOMEM);
+
+ udc->gadget.ep0 = &eps[0].ep;
+
+ INIT_LIST_HEAD(&eps[0].ep.ep_list);
+
+ pp = NULL;
+ i = 0;
+ while ((pp = of_get_next_child(np, pp))) {
+ ep = &eps[i];
+
+ ret = of_property_read_u32(pp, "reg", &val);
+ if (ret) {
+ dev_err(&pdev->dev, "of_probe: reg error(%d)\n", ret);
+ goto err;
+ }
+ ep->index = val;
+
+ ret = of_property_read_u32(pp, "atmel,fifo-size", &val);
+ if (ret) {
+ dev_err(&pdev->dev, "of_probe: fifo-size error(%d)\n", ret);
+ goto err;
+ }
+ ep->fifo_size = val;
+
+ ret = of_property_read_u32(pp, "atmel,nb-banks", &val);
+ if (ret) {
+ dev_err(&pdev->dev, "of_probe: nb-banks error(%d)\n", ret);
+ goto err;
+ }
+ ep->nr_banks = val;
+
+ ep->can_dma = of_property_read_bool(pp, "atmel,can-dma");
+ ep->can_isoc = of_property_read_bool(pp, "atmel,can-isoc");
+
+ ret = of_property_read_string(pp, "name", &name);
+ ep->ep.name = name;
+
+ ep->ep_regs = udc->regs + USBA_EPT_BASE(i);
+ ep->dma_regs = udc->regs + USBA_DMA_BASE(i);
+ ep->fifo = udc->fifo + USBA_FIFO_BASE(i);
+ ep->ep.ops = &usba_ep_ops;
+ ep->ep.maxpacket = ep->fifo_size;
+ ep->udc = udc;
+ INIT_LIST_HEAD(&ep->queue);
+
+ if (i)
+ list_add_tail(&ep->ep.ep_list, &udc->gadget.ep_list);
+
+ i++;
+ }
+
+ return eps;
+err:
+ return ERR_PTR(ret);
+}
+#else
+static struct usba_ep * atmel_udc_of_init(struct platform_device *pdev,
+ struct usba_udc *udc)
+{
+ return ERR_PTR(-ENOSYS);
+}
+#endif
+
+static struct usba_ep * usba_udc_pdata(struct platform_device *pdev,
+ struct usba_udc *udc)
{
struct usba_platform_data *pdata = pdev->dev.platform_data;
+ struct usba_ep *eps;
+ int i;
+
+ if (!pdata)
+ return ERR_PTR(-ENXIO);
+
+ eps = devm_kzalloc(&pdev->dev, sizeof(struct usba_ep) * pdata->num_ep,
+ GFP_KERNEL);
+ if (!eps)
+ return ERR_PTR(-ENOMEM);
+
+ udc->gadget.ep0 = &eps[0].ep;
+
+ udc->vbus_pin = pdata->vbus_pin;
+ udc->vbus_pin_inverted = pdata->vbus_pin_inverted;
+ udc->num_ep = pdata->num_ep;
+
+ INIT_LIST_HEAD(&eps[0].ep.ep_list);
+
+ for (i = 0; i < pdata->num_ep; i++) {
+ struct usba_ep *ep = &eps[i];
+
+ ep->ep_regs = udc->regs + USBA_EPT_BASE(i);
+ ep->dma_regs = udc->regs + USBA_DMA_BASE(i);
+ ep->fifo = udc->fifo + USBA_FIFO_BASE(i);
+ ep->ep.ops = &usba_ep_ops;
+ ep->ep.name = pdata->ep[i].name;
+ ep->fifo_size = ep->ep.maxpacket = pdata->ep[i].fifo_size;
+ ep->udc = udc;
+ INIT_LIST_HEAD(&ep->queue);
+ ep->nr_banks = pdata->ep[i].nr_banks;
+ ep->index = pdata->ep[i].index;
+ ep->can_dma = pdata->ep[i].can_dma;
+ ep->can_isoc = pdata->ep[i].can_isoc;
+
+ if (i)
+ list_add_tail(&ep->ep.ep_list, &udc->gadget.ep_list);
+ }
+
+ return eps;
+}
+
+static int __init usba_udc_probe(struct platform_device *pdev)
+{
struct resource *regs, *fifo;
struct clk *pclk, *hclk;
- struct usba_udc *udc = &the_udc;
+ struct usba_udc *udc;
int irq, ret, i;
+ udc = devm_kzalloc(&pdev->dev, sizeof(*udc), GFP_KERNEL);
+ if (!udc)
+ return -ENOMEM;
+
+ udc->gadget = usba_gadget_template;
+ INIT_LIST_HEAD(&udc->gadget.ep_list);
+
regs = platform_get_resource(pdev, IORESOURCE_MEM, CTRL_IOMEM_ID);
fifo = platform_get_resource(pdev, IORESOURCE_MEM, FIFO_IOMEM_ID);
- if (!regs || !fifo || !pdata)
+ if (!regs || !fifo)
return -ENXIO;
irq = platform_get_irq(pdev, 0);
usba_writel(udc, CTRL, USBA_DISABLE_MASK);
clk_disable(pclk);
- usba_ep = kzalloc(sizeof(struct usba_ep) * pdata->num_ep,
- GFP_KERNEL);
- if (!usba_ep)
- goto err_alloc_ep;
-
- the_udc.gadget.ep0 = &usba_ep[0].ep;
-
- INIT_LIST_HEAD(&usba_ep[0].ep.ep_list);
- usba_ep[0].ep_regs = udc->regs + USBA_EPT_BASE(0);
- usba_ep[0].dma_regs = udc->regs + USBA_DMA_BASE(0);
- usba_ep[0].fifo = udc->fifo + USBA_FIFO_BASE(0);
- usba_ep[0].ep.ops = &usba_ep_ops;
- usba_ep[0].ep.name = pdata->ep[0].name;
- usba_ep[0].ep.maxpacket = pdata->ep[0].fifo_size;
- usba_ep[0].udc = &the_udc;
- INIT_LIST_HEAD(&usba_ep[0].queue);
- usba_ep[0].fifo_size = pdata->ep[0].fifo_size;
- usba_ep[0].nr_banks = pdata->ep[0].nr_banks;
- usba_ep[0].index = pdata->ep[0].index;
- usba_ep[0].can_dma = pdata->ep[0].can_dma;
- usba_ep[0].can_isoc = pdata->ep[0].can_isoc;
-
- for (i = 1; i < pdata->num_ep; i++) {
- struct usba_ep *ep = &usba_ep[i];
-
- ep->ep_regs = udc->regs + USBA_EPT_BASE(i);
- ep->dma_regs = udc->regs + USBA_DMA_BASE(i);
- ep->fifo = udc->fifo + USBA_FIFO_BASE(i);
- ep->ep.ops = &usba_ep_ops;
- ep->ep.name = pdata->ep[i].name;
- ep->ep.maxpacket = pdata->ep[i].fifo_size;
- ep->udc = &the_udc;
- INIT_LIST_HEAD(&ep->queue);
- ep->fifo_size = pdata->ep[i].fifo_size;
- ep->nr_banks = pdata->ep[i].nr_banks;
- ep->index = pdata->ep[i].index;
- ep->can_dma = pdata->ep[i].can_dma;
- ep->can_isoc = pdata->ep[i].can_isoc;
+ if (pdev->dev.of_node)
+ udc->usba_ep = atmel_udc_of_init(pdev, udc);
+ else
+ udc->usba_ep = usba_udc_pdata(pdev, udc);
- list_add_tail(&ep->ep.ep_list, &udc->gadget.ep_list);
+ if (IS_ERR(udc->usba_ep)) {
+ ret = PTR_ERR(udc->usba_ep);
+ goto err_alloc_ep;
}
ret = request_irq(irq, usba_udc_irq, 0, "atmel_usba_udc", udc);
}
udc->irq = irq;
- if (gpio_is_valid(pdata->vbus_pin)) {
- if (!gpio_request(pdata->vbus_pin, "atmel_usba_udc")) {
- udc->vbus_pin = pdata->vbus_pin;
- udc->vbus_pin_inverted = pdata->vbus_pin_inverted;
-
+ if (gpio_is_valid(udc->vbus_pin)) {
+ if (!devm_gpio_request(&pdev->dev, udc->vbus_pin, "atmel_usba_udc")) {
ret = request_irq(gpio_to_irq(udc->vbus_pin),
usba_vbus_irq, 0,
"atmel_usba_udc", udc);
if (ret) {
- gpio_free(udc->vbus_pin);
udc->vbus_pin = -ENODEV;
dev_warn(&udc->pdev->dev,
"failed to request vbus irq; "
goto err_add_udc;
usba_init_debugfs(udc);
- for (i = 1; i < pdata->num_ep; i++)
- usba_ep_init_debugfs(udc, &usba_ep[i]);
+ for (i = 1; i < udc->num_ep; i++)
+ usba_ep_init_debugfs(udc, &udc->usba_ep[i]);
return 0;
err_add_udc:
- if (gpio_is_valid(pdata->vbus_pin)) {
+ if (gpio_is_valid(udc->vbus_pin))
free_irq(gpio_to_irq(udc->vbus_pin), udc);
- gpio_free(udc->vbus_pin);
- }
free_irq(irq, udc);
err_request_irq:
- kfree(usba_ep);
err_alloc_ep:
iounmap(udc->fifo);
err_map_fifo:
{
struct usba_udc *udc;
int i;
- struct usba_platform_data *pdata = pdev->dev.platform_data;
udc = platform_get_drvdata(pdev);
usb_del_gadget_udc(&udc->gadget);
- for (i = 1; i < pdata->num_ep; i++)
- usba_ep_cleanup_debugfs(&usba_ep[i]);
+ for (i = 1; i < udc->num_ep; i++)
+ usba_ep_cleanup_debugfs(&udc->usba_ep[i]);
usba_cleanup_debugfs(udc);
if (gpio_is_valid(udc->vbus_pin)) {
free_irq(gpio_to_irq(udc->vbus_pin), udc);
- gpio_free(udc->vbus_pin);
}
free_irq(udc->irq, udc);
- kfree(usba_ep);
iounmap(udc->fifo);
iounmap(udc->regs);
clk_put(udc->hclk);
return 0;
}
+#if defined(CONFIG_OF)
+static const struct of_device_id atmel_udc_dt_ids[] = {
+ { .compatible = "atmel,at91sam9rl-udc" },
+ { /* sentinel */ }
+};
+
+MODULE_DEVICE_TABLE(of, atmel_udc_dt_ids);
+#endif
+
static struct platform_driver udc_driver = {
.remove = __exit_p(usba_udc_remove),
.driver = {
.name = "atmel_usba_udc",
.owner = THIS_MODULE,
+ .of_match_table = of_match_ptr(atmel_udc_dt_ids),
},
};
projects / firefly-linux-kernel-4.4.55.git / blobdiff