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path: root/drivers/usb/musb/jz4740.c
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Diffstat (limited to 'drivers/usb/musb/jz4740.c')
-rw-r--r--drivers/usb/musb/jz4740.c82
1 files changed, 42 insertions, 40 deletions
diff --git a/drivers/usb/musb/jz4740.c b/drivers/usb/musb/jz4740.c
index 5261f8dfedec..bc0109f4700b 100644
--- a/drivers/usb/musb/jz4740.c
+++ b/drivers/usb/musb/jz4740.c
@@ -17,16 +17,15 @@
#include "musb_core.h"
struct jz4740_glue {
- struct device *dev;
- struct platform_device *musb;
+ struct platform_device *pdev;
struct clk *clk;
};
static irqreturn_t jz4740_musb_interrupt(int irq, void *__hci)
{
- unsigned long flags;
- irqreturn_t retval = IRQ_NONE;
- struct musb *musb = __hci;
+ unsigned long flags;
+ irqreturn_t retval = IRQ_NONE;
+ struct musb *musb = __hci;
spin_lock_irqsave(&musb->lock, flags);
@@ -40,7 +39,7 @@ static irqreturn_t jz4740_musb_interrupt(int irq, void *__hci)
* never see them set
*/
musb->int_usb &= MUSB_INTR_SUSPEND | MUSB_INTR_RESUME |
- MUSB_INTR_RESET | MUSB_INTR_SOF;
+ MUSB_INTR_RESET | MUSB_INTR_SOF;
if (musb->int_usb || musb->int_tx || musb->int_rx)
retval = musb_interrupt(musb);
@@ -51,41 +50,40 @@ static irqreturn_t jz4740_musb_interrupt(int irq, void *__hci)
}
static struct musb_fifo_cfg jz4740_musb_fifo_cfg[] = {
-{ .hw_ep_num = 1, .style = FIFO_TX, .maxpacket = 512, },
-{ .hw_ep_num = 1, .style = FIFO_RX, .maxpacket = 512, },
-{ .hw_ep_num = 2, .style = FIFO_TX, .maxpacket = 64, },
+ { .hw_ep_num = 1, .style = FIFO_TX, .maxpacket = 512, },
+ { .hw_ep_num = 1, .style = FIFO_RX, .maxpacket = 512, },
+ { .hw_ep_num = 2, .style = FIFO_TX, .maxpacket = 64, },
};
static const struct musb_hdrc_config jz4740_musb_config = {
/* Silicon does not implement USB OTG. */
- .multipoint = 0,
+ .multipoint = 0,
/* Max EPs scanned, driver will decide which EP can be used. */
- .num_eps = 4,
+ .num_eps = 4,
/* RAMbits needed to configure EPs from table */
- .ram_bits = 9,
- .fifo_cfg = jz4740_musb_fifo_cfg,
- .fifo_cfg_size = ARRAY_SIZE(jz4740_musb_fifo_cfg),
-};
-
-static struct musb_hdrc_platform_data jz4740_musb_platform_data = {
- .mode = MUSB_PERIPHERAL,
- .config = &jz4740_musb_config,
+ .ram_bits = 9,
+ .fifo_cfg = jz4740_musb_fifo_cfg,
+ .fifo_cfg_size = ARRAY_SIZE(jz4740_musb_fifo_cfg),
};
static int jz4740_musb_init(struct musb *musb)
{
struct device *dev = musb->controller->parent;
+ int err;
if (dev->of_node)
musb->xceiv = devm_usb_get_phy_by_phandle(dev, "phys", 0);
else
musb->xceiv = devm_usb_get_phy(dev, USB_PHY_TYPE_USB2);
if (IS_ERR(musb->xceiv)) {
- dev_err(dev, "No transceiver configured\n");
- return PTR_ERR(musb->xceiv);
+ err = PTR_ERR(musb->xceiv);
+ if (err != -EPROBE_DEFER)
+ dev_err(dev, "No transceiver configured: %d", err);
+ return err;
}
- /* Silicon does not implement ConfigData register.
+ /*
+ * Silicon does not implement ConfigData register.
* Set dyn_fifo to avoid reading EP config from hardware.
*/
musb->dyn_fifo = true;
@@ -105,63 +103,67 @@ static const struct musb_platform_ops jz4740_musb_ops = {
.init = jz4740_musb_init,
};
+static const struct musb_hdrc_platform_data jz4740_musb_pdata = {
+ .mode = MUSB_PERIPHERAL,
+ .config = &jz4740_musb_config,
+ .platform_ops = &jz4740_musb_ops,
+};
+
static int jz4740_probe(struct platform_device *pdev)
{
- struct musb_hdrc_platform_data *pdata = &jz4740_musb_platform_data;
+ struct device *dev = &pdev->dev;
+ const struct musb_hdrc_platform_data *pdata = &jz4740_musb_pdata;
struct platform_device *musb;
struct jz4740_glue *glue;
- struct clk *clk;
+ struct clk *clk;
int ret;
- glue = devm_kzalloc(&pdev->dev, sizeof(*glue), GFP_KERNEL);
+ glue = devm_kzalloc(dev, sizeof(*glue), GFP_KERNEL);
if (!glue)
return -ENOMEM;
musb = platform_device_alloc("musb-hdrc", PLATFORM_DEVID_AUTO);
if (!musb) {
- dev_err(&pdev->dev, "failed to allocate musb device\n");
+ dev_err(dev, "failed to allocate musb device");
return -ENOMEM;
}
- clk = devm_clk_get(&pdev->dev, "udc");
+ clk = devm_clk_get(dev, "udc");
if (IS_ERR(clk)) {
- dev_err(&pdev->dev, "failed to get clock\n");
+ dev_err(dev, "failed to get clock");
ret = PTR_ERR(clk);
goto err_platform_device_put;
}
ret = clk_prepare_enable(clk);
if (ret) {
- dev_err(&pdev->dev, "failed to enable clock\n");
+ dev_err(dev, "failed to enable clock");
goto err_platform_device_put;
}
- musb->dev.parent = &pdev->dev;
+ musb->dev.parent = dev;
- glue->dev = &pdev->dev;
- glue->musb = musb;
+ glue->pdev = musb;
glue->clk = clk;
- pdata->platform_ops = &jz4740_musb_ops;
-
platform_set_drvdata(pdev, glue);
ret = platform_device_add_resources(musb, pdev->resource,
pdev->num_resources);
if (ret) {
- dev_err(&pdev->dev, "failed to add resources\n");
+ dev_err(dev, "failed to add resources");
goto err_clk_disable;
}
ret = platform_device_add_data(musb, pdata, sizeof(*pdata));
if (ret) {
- dev_err(&pdev->dev, "failed to add platform_data\n");
+ dev_err(dev, "failed to add platform_data");
goto err_clk_disable;
}
ret = platform_device_add(musb);
if (ret) {
- dev_err(&pdev->dev, "failed to register musb device\n");
+ dev_err(dev, "failed to register musb device");
goto err_clk_disable;
}
@@ -176,9 +178,9 @@ err_platform_device_put:
static int jz4740_remove(struct platform_device *pdev)
{
- struct jz4740_glue *glue = platform_get_drvdata(pdev);
+ struct jz4740_glue *glue = platform_get_drvdata(pdev);
- platform_device_unregister(glue->musb);
+ platform_device_unregister(glue->pdev);
clk_disable_unprepare(glue->clk);
return 0;
@@ -187,7 +189,7 @@ static int jz4740_remove(struct platform_device *pdev)
#ifdef CONFIG_OF
static const struct of_device_id jz4740_musb_of_match[] = {
{ .compatible = "ingenic,jz4740-musb" },
- {},
+ { /* sentinel */ },
};
MODULE_DEVICE_TABLE(of, jz4740_musb_of_match);
#endif
Copyright © 1996 – 2023 Jason A. Donenfeld. All Rights Reverse Engineered.