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path: root/drivers/usb/gadget/lpc32xx_udc.c
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Diffstat (limited to 'drivers/usb/gadget/lpc32xx_udc.c')
-rw-r--r--drivers/usb/gadget/lpc32xx_udc.c85
1 files changed, 25 insertions, 60 deletions
diff --git a/drivers/usb/gadget/lpc32xx_udc.c b/drivers/usb/gadget/lpc32xx_udc.c
index 2ab0388d93eb..f1ec99e69cb7 100644
--- a/drivers/usb/gadget/lpc32xx_udc.c
+++ b/drivers/usb/gadget/lpc32xx_udc.c
@@ -165,6 +165,7 @@ struct lpc32xx_udc {
int udp_irq[4];
struct clk *usb_pll_clk;
struct clk *usb_slv_clk;
+ struct clk *usb_otg_clk;
/* DMA support */
u32 *udca_v_base;
@@ -227,33 +228,15 @@ static inline struct lpc32xx_udc *to_udc(struct usb_gadget *g)
#define UDCA_BUFF_SIZE (128)
/* TODO: When the clock framework is introduced in LPC32xx, IO_ADDRESS will
- * be replaced with an inremap()ed pointer, see USB_OTG_CLK_CTRL()
+ * be replaced with an inremap()ed pointer
* */
#define USB_CTRL IO_ADDRESS(LPC32XX_CLK_PM_BASE + 0x64)
-#define USB_CLOCK_MASK (AHB_M_CLOCK_ON | OTG_CLOCK_ON | \
- DEV_CLOCK_ON | I2C_CLOCK_ON)
/* USB_CTRL bit defines */
#define USB_SLAVE_HCLK_EN (1 << 24)
#define USB_HOST_NEED_CLK_EN (1 << 21)
#define USB_DEV_NEED_CLK_EN (1 << 22)
-#define USB_OTG_CLK_CTRL(udc) ((udc)->udp_baseaddr + 0xFF4)
-#define USB_OTG_CLK_STAT(udc) ((udc)->udp_baseaddr + 0xFF8)
-
-/* USB_OTG_CLK_CTRL bit defines */
-#define AHB_M_CLOCK_ON (1 << 4)
-#define OTG_CLOCK_ON (1 << 3)
-#define I2C_CLOCK_ON (1 << 2)
-#define DEV_CLOCK_ON (1 << 1)
-#define HOST_CLOCK_ON (1 << 0)
-
-#define USB_OTG_STAT_CONTROL(udc) (udc->udp_baseaddr + 0x110)
-
-/* USB_OTG_STAT_CONTROL bit defines */
-#define TRANSPARENT_I2C_EN (1 << 7)
-#define HOST_EN (1 << 0)
-
/**********************************************************************
* USB device controller register offsets
**********************************************************************/
@@ -677,7 +660,7 @@ static void isp1301_udc_configure(struct lpc32xx_udc *udc)
ISP1301_I2C_INTERRUPT_RISING, INT_VBUS_VLD);
/* Enable usb_need_clk clock after transceiver is initialized */
- writel((readl(USB_CTRL) | (1 << 22)), USB_CTRL);
+ writel((readl(USB_CTRL) | USB_DEV_NEED_CLK_EN), USB_CTRL);
dev_info(udc->dev, "ISP1301 Vendor ID : 0x%04x\n",
i2c_smbus_read_word_data(udc->isp1301_i2c_client, 0x00));
@@ -1010,11 +993,8 @@ static void udc_dd_free(struct lpc32xx_udc *udc, struct lpc32xx_usbd_dd_gad *dd)
/* Enables or disables most of the USB system clocks when low power mode is
* needed. Clocks are typically started on a connection event, and disabled
* when a cable is disconnected */
-#define OTGOFF_CLK_MASK (AHB_M_CLOCK_ON | I2C_CLOCK_ON)
static void udc_clk_set(struct lpc32xx_udc *udc, int enable)
{
- int to = 1000;
-
if (enable != 0) {
if (udc->clocked)
return;
@@ -1028,14 +1008,7 @@ static void udc_clk_set(struct lpc32xx_udc *udc, int enable)
writel(readl(USB_CTRL) | USB_DEV_NEED_CLK_EN,
USB_CTRL);
- /* Set to enable all needed USB OTG clocks */
- writel(USB_CLOCK_MASK, USB_OTG_CLK_CTRL(udc));
-
- while (((readl(USB_OTG_CLK_STAT(udc)) & USB_CLOCK_MASK) !=
- USB_CLOCK_MASK) && (to > 0))
- to--;
- if (!to)
- dev_dbg(udc->dev, "Cannot enable USB OTG clocking\n");
+ clk_enable(udc->usb_otg_clk);
} else {
if (!udc->clocked)
return;
@@ -1047,19 +1020,11 @@ static void udc_clk_set(struct lpc32xx_udc *udc, int enable)
/* 48MHz PLL dpwn */
clk_disable(udc->usb_pll_clk);
- /* Enable the USB device clock */
+ /* Disable the USB device clock */
writel(readl(USB_CTRL) & ~USB_DEV_NEED_CLK_EN,
USB_CTRL);
- /* Set to enable all needed USB OTG clocks */
- writel(OTGOFF_CLK_MASK, USB_OTG_CLK_CTRL(udc));
-
- while (((readl(USB_OTG_CLK_STAT(udc)) &
- OTGOFF_CLK_MASK) !=
- OTGOFF_CLK_MASK) && (to > 0))
- to--;
- if (!to)
- dev_dbg(udc->dev, "Cannot disable USB OTG clocking\n");
+ clk_disable(udc->usb_otg_clk);
}
}
@@ -3041,6 +3006,7 @@ static int lpc32xx_start(struct usb_gadget_driver *driver,
udc->driver = driver;
udc->gadget.dev.driver = &driver->driver;
+ udc->gadget.dev.of_node = udc->dev->of_node;
udc->enabled = 1;
udc->selfpowered = 1;
udc->vbus = 0;
@@ -3239,6 +3205,12 @@ static int __init lpc32xx_udc_probe(struct platform_device *pdev)
retval = PTR_ERR(udc->usb_slv_clk);
goto usb_clk_get_fail;
}
+ udc->usb_otg_clk = clk_get(&pdev->dev, "ck_usb_otg");
+ if (IS_ERR(udc->usb_otg_clk)) {
+ dev_err(udc->dev, "failed to acquire USB otg clock\n");
+ retval = PTR_ERR(udc->usb_slv_clk);
+ goto usb_otg_clk_get_fail;
+ }
/* Setup PLL clock to 48MHz */
retval = clk_enable(udc->usb_pll_clk);
@@ -3262,15 +3234,12 @@ static int __init lpc32xx_udc_probe(struct platform_device *pdev)
goto usb_clk_enable_fail;
}
- /* Set to enable all needed USB OTG clocks */
- writel(USB_CLOCK_MASK, USB_OTG_CLK_CTRL(udc));
-
- i = 1000;
- while (((readl(USB_OTG_CLK_STAT(udc)) & USB_CLOCK_MASK) !=
- USB_CLOCK_MASK) && (i > 0))
- i--;
- if (!i)
- dev_dbg(udc->dev, "USB OTG clocks not correctly enabled\n");
+ /* Enable USB OTG clock */
+ retval = clk_enable(udc->usb_otg_clk);
+ if (retval < 0) {
+ dev_err(udc->dev, "failed to start USB otg clock\n");
+ goto usb_otg_clk_enable_fail;
+ }
/* Setup deferred workqueue data */
udc->poweron = udc->pullup = 0;
@@ -3390,12 +3359,16 @@ dma_alloc_fail:
dma_free_coherent(&pdev->dev, UDCA_BUFF_SIZE,
udc->udca_v_base, udc->udca_p_base);
i2c_fail:
+ clk_disable(udc->usb_otg_clk);
+usb_otg_clk_enable_fail:
clk_disable(udc->usb_slv_clk);
usb_clk_enable_fail:
pll_set_fail:
clk_disable(udc->usb_pll_clk);
pll_enable_fail:
clk_put(udc->usb_slv_clk);
+usb_otg_clk_get_fail:
+ clk_put(udc->usb_otg_clk);
usb_clk_get_fail:
clk_put(udc->usb_pll_clk);
pll_get_fail:
@@ -3433,6 +3406,8 @@ static int __devexit lpc32xx_udc_remove(struct platform_device *pdev)
device_unregister(&udc->gadget.dev);
+ clk_disable(udc->usb_otg_clk);
+ clk_put(udc->usb_otg_clk);
clk_disable(udc->usb_slv_clk);
clk_put(udc->usb_slv_clk);
clk_disable(udc->usb_pll_clk);
@@ -3446,7 +3421,6 @@ static int __devexit lpc32xx_udc_remove(struct platform_device *pdev)
#ifdef CONFIG_PM
static int lpc32xx_udc_suspend(struct platform_device *pdev, pm_message_t mesg)
{
- int to = 1000;
struct lpc32xx_udc *udc = platform_get_drvdata(pdev);
if (udc->clocked) {
@@ -3461,15 +3435,6 @@ static int lpc32xx_udc_suspend(struct platform_device *pdev, pm_message_t mesg)
on resume */
udc->clocked = 1;
- /* Kill OTG and I2C clocks */
- writel(0, USB_OTG_CLK_CTRL(udc));
- while (((readl(USB_OTG_CLK_STAT(udc)) & OTGOFF_CLK_MASK) !=
- OTGOFF_CLK_MASK) && (to > 0))
- to--;
- if (!to)
- dev_dbg(udc->dev,
- "USB OTG clocks not correctly enabled\n");
-
/* Kill global USB clock */
clk_disable(udc->usb_slv_clk);
}
generated by cgit v1.2.3 (git 2.39.0) at 2024-12-21 11:00:07 +0300