[PATCH 7/9] usb: add Atmel USBA UDC DT support
Jean-Christophe PLAGNIOL-VILLARD
plagnioj at jcrosoft.com
Wed Mar 14 05:27:07 EDT 2012
Hi,
except the boolean that I need to update is it ok?
Best Regards,
J.
On 10:15 Wed 07 Mar , Jean-Christophe PLAGNIOL-VILLARD wrote:
> Allow to compile the driver all the time if AT91 enabled.
>
> Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj at jcrosoft.com>
> Cc: Nicolas Ferre <nicolas.ferre at atmel.com>
> Cc: linux-usb at vger.kernel.org
> ---
> Hi Greg
>
> if it's ok with you I apply with the rest of the USB patch series via
> at91
>
> Best Regards,
> J. .../devicetree/bindings/usb/atmel-usb.txt | 86 ++++++++
> drivers/usb/gadget/Kconfig | 2 +-
> drivers/usb/gadget/atmel_usba_udc.c | 209 +++++++++++++++-----
> drivers/usb/gadget/atmel_usba_udc.h | 1 +
> 4 files changed, 248 insertions(+), 50 deletions(-)
>
> diff --git a/Documentation/devicetree/bindings/usb/atmel-usb.txt b/Documentation/devicetree/bindings/usb/atmel-usb.txt
> index 60bd215..b44f87e 100644
> --- a/Documentation/devicetree/bindings/usb/atmel-usb.txt
> +++ b/Documentation/devicetree/bindings/usb/atmel-usb.txt
> @@ -47,3 +47,89 @@ usb1: gadget at fffa4000 {
> interrupts = <10 4>;
> atmel,vbus-gpio = <&pioC 5 0>;
> };
> +
> +Atmel High-Speed USB device controller
> +
> +Required properties:
> + - compatible: Should be "atmel,at91sam9rl-udc"
> + - reg: Address and length of the register set for the device
> + - interrupts: Should contain macb interrupt
> + - ep childnode: To specifiy the number of endpoints and their properties.
> +
> +Optional properties:
> + - atmel,vbus-gpio: If present, specifies a gpio that needs to be
> + activated for the bus to be powered.
> +
> +Required child node properties:
> + - name: Name of the endpoint.
> + - reg: Num of the endpoint.
> + - atmel,fifo-size: Size of the fifo.
> + - atmel,nb-banks: Number of banks.
> + - atmel,can-dma: Boolean to specify if the endpoint support DMA.
> + - atmel,can-isoc: Boolean to specify if the endpoint support ISOC.
> +
> +usb2: gadget at fff78000 {
> + #address-cells = <1>;
> + #size-cells = <0>;
> + compatible = "atmel,at91sam9rl-udc";
> + reg = <0x00600000 0x80000
> + 0xfff78000 0x400>;
> + interrupts = <27 4>;
> + atmel,vbus-gpio = <&pioB 19 0>;
> +
> + ep0 {
> + reg = <0>;
> + atmel,fifo-size = <64>;
> + atmel,nb-banks = <1>;
> + atmel,can-dma = <0>;
> + atmel,can-isoc = <0>;
> + };
> +
> + ep1 {
> + reg = <1>;
> + atmel,fifo-size = <1024>;
> + atmel,nb-banks = <2>;
> + atmel,can-dma = <1>;
> + atmel,can-isoc = <1>;
> + };
> +
> + ep2 {
> + reg = <2>;
> + atmel,fifo-size = <1024>;
> + atmel,nb-banks = <2>;
> + atmel,can-dma = <1>;
> + atmel,can-isoc = <1>;
> + };
> +
> + ep3 {
> + reg = <3>;
> + atmel,fifo-size = <1024>;
> + atmel,nb-banks = <3>;
> + atmel,can-dma = <1>;
> + atmel,can-isoc = <0>;
> + };
> +
> + ep4 {
> + reg = <4>;
> + atmel,fifo-size = <1024>;
> + atmel,nb-banks = <3>;
> + atmel,can-dma = <1>;
> + atmel,can-isoc = <0>;
> + };
> +
> + ep5 {
> + reg = <5>;
> + atmel,fifo-size = <1024>;
> + atmel,nb-banks = <3>;
> + atmel,can-dma = <1>;
> + atmel,can-isoc = <1>;
> + };
> +
> + ep6 {
> + reg = <6>;
> + atmel,fifo-size = <1024>;
> + atmel,nb-banks = <3>;
> + atmel,can-dma = <1>;
> + atmel,can-isoc = <1>;
> + };
> +};
> diff --git a/drivers/usb/gadget/Kconfig b/drivers/usb/gadget/Kconfig
> index edf1144..1dbba6c 100644
> --- a/drivers/usb/gadget/Kconfig
> +++ b/drivers/usb/gadget/Kconfig
> @@ -150,7 +150,7 @@ config USB_AT91
> config USB_ATMEL_USBA
> tristate "Atmel USBA"
> select USB_GADGET_DUALSPEED
> - depends on AVR32 || ARCH_AT91SAM9RL || ARCH_AT91SAM9G45
> + depends on AVR32 || ARCH_AT91
> help
> USBA is the integrated high-speed USB Device controller on
> the AT32AP700x, some AT91SAM9 and AT91CAP9 processors from Atmel.
> diff --git a/drivers/usb/gadget/atmel_usba_udc.c b/drivers/usb/gadget/atmel_usba_udc.c
> index ce9dffb..234eabb 100644
> --- a/drivers/usb/gadget/atmel_usba_udc.c
> +++ b/drivers/usb/gadget/atmel_usba_udc.c
> @@ -21,6 +21,8 @@
> #include <linux/usb/gadget.h>
> #include <linux/usb/atmel_usba_udc.h>
> #include <linux/delay.h>
> +#include <linux/of.h>
> +#include <linux/of_gpio.h>
>
> #include <asm/gpio.h>
> #include <mach/board.h>
> @@ -1885,9 +1887,143 @@ static int atmel_usba_stop(struct usb_gadget_driver *driver)
> return 0;
> }
>
> -static int __init usba_udc_probe(struct platform_device *pdev)
> +#ifdef CONFIG_OF
> +static struct usba_ep * __devinit 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 * __devinit atmel_udc_of_init(struct platform_device *pdev,
> + struct usba_udc *udc)
> +{
> + return ERR_PTR(-ENOSYS);
> +}
> +#endif
> +
> +static struct usba_ep * __devinit 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;
> @@ -1895,7 +2031,7 @@ static int __init usba_udc_probe(struct platform_device *pdev)
>
> 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);
> @@ -1945,46 +2081,14 @@ static int __init usba_udc_probe(struct platform_device *pdev)
> 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)
> + usba_ep = atmel_udc_of_init(pdev, udc);
> + else
> + usba_ep = usba_udc_pdata(pdev, udc);
>
> - list_add_tail(&ep->ep.ep_list, &udc->gadget.ep_list);
> + if (IS_ERR(usba_ep)) {
> + ret = PTR_ERR(usba_ep);
> + goto err_alloc_ep;
> }
>
> ret = request_irq(irq, usba_udc_irq, 0, "atmel_usba_udc", udc);
> @@ -2001,10 +2105,8 @@ static int __init usba_udc_probe(struct platform_device *pdev)
> goto err_device_add;
> }
>
> - 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 (!gpio_request(udc->vbus_pin, "atmel_usba_udc")) {
>
> ret = request_irq(gpio_to_irq(udc->vbus_pin),
> usba_vbus_irq, 0,
> @@ -2029,13 +2131,13 @@ static int __init usba_udc_probe(struct platform_device *pdev)
> goto err_add_udc;
>
> usba_init_debugfs(udc);
> - for (i = 1; i < pdata->num_ep; i++)
> + for (i = 1; i < udc->num_ep; i++)
> usba_ep_init_debugfs(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);
> }
> @@ -2064,13 +2166,12 @@ static int __exit usba_udc_remove(struct platform_device *pdev)
> {
> 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++)
> + for (i = 1; i < udc->num_ep; i++)
> usba_ep_cleanup_debugfs(&usba_ep[i]);
> usba_cleanup_debugfs(udc);
>
> @@ -2091,11 +2192,21 @@ static int __exit usba_udc_remove(struct platform_device *pdev)
> 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),
> },
> };
>
> diff --git a/drivers/usb/gadget/atmel_usba_udc.h b/drivers/usb/gadget/atmel_usba_udc.h
> index 88a2e07..2c068e7 100644
> --- a/drivers/usb/gadget/atmel_usba_udc.h
> +++ b/drivers/usb/gadget/atmel_usba_udc.h
> @@ -324,6 +324,7 @@ struct usba_udc {
> int irq;
> int vbus_pin;
> int vbus_pin_inverted;
> + int num_ep;
> struct clk *pclk;
> struct clk *hclk;
>
> --
> 1.7.7
>
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