diff options
author | Linus Walleij <linus.walleij@linaro.org> | 2022-09-01 10:16:49 +0200 |
---|---|---|
committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2022-09-07 16:23:54 +0200 |
commit | 787f51f210ebe5d7d5e4c8101b148f0018e9c409 (patch) | |
tree | 74e67c42626a5d7c199c4127720d42e627b48f48 /drivers/usb/gadget | |
parent | a8113da51cf822f90e93436442db5095e20ff6d9 (diff) | |
download | linux-787f51f210ebe5d7d5e4c8101b148f0018e9c409.tar.bz2 |
USB/ARM: Switch S3C2410 UDC to GPIO descriptors
This converts the S3C2410 UDC USB device controller to use
GPIO descriptor tables and modern GPIO.
Cc: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Cc: Alim Akhtar <alim.akhtar@samsung.com>
Cc: linux-arm-kernel@lists.infradead.org
Cc: linux-samsung-soc@vger.kernel.org
Acked-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Link: https://lore.kernel.org/r/20220901081649.564348-1-linus.walleij@linaro.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/usb/gadget')
-rw-r--r-- | drivers/usb/gadget/udc/s3c2410_udc.c | 78 | ||||
-rw-r--r-- | drivers/usb/gadget/udc/s3c2410_udc.h | 3 |
2 files changed, 35 insertions, 46 deletions
diff --git a/drivers/usb/gadget/udc/s3c2410_udc.c b/drivers/usb/gadget/udc/s3c2410_udc.c index c6625aeb7bca..8c57b191e52b 100644 --- a/drivers/usb/gadget/udc/s3c2410_udc.c +++ b/drivers/usb/gadget/udc/s3c2410_udc.c @@ -23,7 +23,7 @@ #include <linux/interrupt.h> #include <linux/platform_device.h> #include <linux/clk.h> -#include <linux/gpio.h> +#include <linux/gpio/consumer.h> #include <linux/prefetch.h> #include <linux/io.h> @@ -1419,8 +1419,7 @@ static int s3c2410_udc_set_pullup(struct s3c2410_udc *udc, int is_on) { dprintk(DEBUG_NORMAL, "%s()\n", __func__); - if (udc_info && (udc_info->udc_command || - gpio_is_valid(udc_info->pullup_pin))) { + if (udc_info && (udc_info->udc_command || udc->pullup_gpiod)) { if (is_on) s3c2410_udc_enable(udc); @@ -1467,9 +1466,7 @@ static irqreturn_t s3c2410_udc_vbus_irq(int irq, void *_dev) dprintk(DEBUG_NORMAL, "%s()\n", __func__); - value = gpio_get_value(udc_info->vbus_pin) ? 1 : 0; - if (udc_info->vbus_pin_inverted) - value = !value; + value = gpiod_get_value(dev->vbus_gpiod); if (value != dev->vbus) s3c2410_udc_vbus_session(&dev->gadget, value); @@ -1504,14 +1501,15 @@ static const struct usb_gadget_ops s3c2410_ops = { .udc_stop = s3c2410_udc_stop, }; -static void s3c2410_udc_command(enum s3c2410_udc_cmd_e cmd) +static void s3c2410_udc_command(struct s3c2410_udc *udc, + enum s3c2410_udc_cmd_e cmd) { if (!udc_info) return; if (udc_info->udc_command) { udc_info->udc_command(cmd); - } else if (gpio_is_valid(udc_info->pullup_pin)) { + } else if (udc->pullup_gpiod) { int value; switch (cmd) { @@ -1524,9 +1522,8 @@ static void s3c2410_udc_command(enum s3c2410_udc_cmd_e cmd) default: return; } - value ^= udc_info->pullup_pin_inverted; - gpio_set_value(udc_info->pullup_pin, value); + gpiod_set_value(udc->pullup_gpiod, value); } } @@ -1551,7 +1548,7 @@ static void s3c2410_udc_disable(struct s3c2410_udc *dev) udc_write(0x1F, S3C2410_UDC_EP_INT_REG); /* Good bye, cruel world */ - s3c2410_udc_command(S3C2410_UDC_P_DISABLE); + s3c2410_udc_command(dev, S3C2410_UDC_P_DISABLE); /* Set speed to unknown */ dev->gadget.speed = USB_SPEED_UNKNOWN; @@ -1613,7 +1610,7 @@ static void s3c2410_udc_enable(struct s3c2410_udc *dev) udc_write(S3C2410_UDC_INT_EP0, S3C2410_UDC_EP_INT_EN_REG); /* time to say "hello, world" */ - s3c2410_udc_command(S3C2410_UDC_P_ENABLE); + s3c2410_udc_command(dev, S3C2410_UDC_P_ENABLE); } static int s3c2410_udc_start(struct usb_gadget *g, @@ -1802,14 +1799,15 @@ static int s3c2410_udc_probe(struct platform_device *pdev) dev_dbg(dev, "got irq %i\n", irq_usbd); - if (udc_info && udc_info->vbus_pin > 0) { - retval = gpio_request(udc_info->vbus_pin, "udc vbus"); - if (retval < 0) { - dev_err(dev, "cannot claim vbus pin\n"); - goto err_int; - } + udc->vbus_gpiod = gpiod_get_optional(dev, "vbus", GPIOD_IN); + if (IS_ERR(udc->vbus_gpiod)) { + retval = PTR_ERR(udc->vbus_gpiod); + goto err_int; + } + if (udc->vbus_gpiod) { + gpiod_set_consumer_name(udc->vbus_gpiod, "udc vbus"); - irq = gpio_to_irq(udc_info->vbus_pin); + irq = gpiod_to_irq(udc->vbus_gpiod); if (irq < 0) { dev_err(dev, "no irq for gpio vbus pin\n"); retval = irq; @@ -1833,16 +1831,12 @@ static int s3c2410_udc_probe(struct platform_device *pdev) udc->vbus = 1; } - if (udc_info && !udc_info->udc_command && - gpio_is_valid(udc_info->pullup_pin)) { - - retval = gpio_request_one(udc_info->pullup_pin, - udc_info->vbus_pin_inverted ? - GPIOF_OUT_INIT_HIGH : GPIOF_OUT_INIT_LOW, - "udc pullup"); - if (retval) - goto err_vbus_irq; + udc->pullup_gpiod = gpiod_get_optional(dev, "pullup", GPIOD_OUT_LOW); + if (IS_ERR(udc->pullup_gpiod)) { + retval = PTR_ERR(udc->pullup_gpiod); + goto err_vbus_irq; } + gpiod_set_consumer_name(udc->pullup_gpiod, "udc pullup"); retval = usb_add_gadget_udc(&pdev->dev, &udc->gadget); if (retval) @@ -1856,15 +1850,10 @@ static int s3c2410_udc_probe(struct platform_device *pdev) return 0; err_add_udc: - if (udc_info && !udc_info->udc_command && - gpio_is_valid(udc_info->pullup_pin)) - gpio_free(udc_info->pullup_pin); err_vbus_irq: - if (udc_info && udc_info->vbus_pin > 0) - free_irq(gpio_to_irq(udc_info->vbus_pin), udc); + if (udc->vbus_gpiod) + free_irq(gpiod_to_irq(udc->vbus_gpiod), udc); err_gpio_claim: - if (udc_info && udc_info->vbus_pin > 0) - gpio_free(udc_info->vbus_pin); err_int: free_irq(irq_usbd, udc); err_udc_clk: @@ -1885,7 +1874,6 @@ err_usb_bus_clk: static int s3c2410_udc_remove(struct platform_device *pdev) { struct s3c2410_udc *udc = platform_get_drvdata(pdev); - unsigned int irq; dev_dbg(&pdev->dev, "%s()\n", __func__); @@ -1895,14 +1883,8 @@ static int s3c2410_udc_remove(struct platform_device *pdev) usb_del_gadget_udc(&udc->gadget); debugfs_remove(debugfs_lookup("registers", s3c2410_udc_debugfs_root)); - if (udc_info && !udc_info->udc_command && - gpio_is_valid(udc_info->pullup_pin)) - gpio_free(udc_info->pullup_pin); - - if (udc_info && udc_info->vbus_pin > 0) { - irq = gpio_to_irq(udc_info->vbus_pin); - free_irq(irq, udc); - } + if (udc->vbus_gpiod) + free_irq(gpiod_to_irq(udc->vbus_gpiod), udc); free_irq(irq_usbd, udc); @@ -1926,14 +1908,18 @@ static int s3c2410_udc_remove(struct platform_device *pdev) static int s3c2410_udc_suspend(struct platform_device *pdev, pm_message_t message) { - s3c2410_udc_command(S3C2410_UDC_P_DISABLE); + struct s3c2410_udc *udc = platform_get_drvdata(pdev); + + s3c2410_udc_command(udc, S3C2410_UDC_P_DISABLE); return 0; } static int s3c2410_udc_resume(struct platform_device *pdev) { - s3c2410_udc_command(S3C2410_UDC_P_ENABLE); + struct s3c2410_udc *udc = platform_get_drvdata(pdev); + + s3c2410_udc_command(udc, S3C2410_UDC_P_ENABLE); return 0; } diff --git a/drivers/usb/gadget/udc/s3c2410_udc.h b/drivers/usb/gadget/udc/s3c2410_udc.h index 135a5bff3c74..cdbf202e5ee8 100644 --- a/drivers/usb/gadget/udc/s3c2410_udc.h +++ b/drivers/usb/gadget/udc/s3c2410_udc.h @@ -83,6 +83,9 @@ struct s3c2410_udc { u32 port_status; int ep0state; + struct gpio_desc *vbus_gpiod; + struct gpio_desc *pullup_gpiod; + unsigned got_irq : 1; unsigned req_std : 1; |