xiaomi-sm8450/android_kernel_xiaomi_sm8450
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ARM: EXYNOS: Add usb otg phy control for EXYNOS4210

Pārlūkot izejas kodu 
This patch supports to control usb otg phy of EXYNOS4210.

Signed-off-by: Joonyoung Shim <jy0922.shim@samsung.com>
Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
[Rebased on the newest git/kgene/linux-samsung #for-next]
Signed-off-by: Lukasz Majewski <l.majewski@samsung.com>
[kgene.kim@samsung.com: squashed 2 patches together]
Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>
Šī revīzija ir iekļauta:
Lukasz Majewski
2012-05-13 08:28:28 +09:00
revīziju iesūtīja Kukjin Kim
vecāks 36be50515f
revīzija 8ea2d9e7de
4 mainīti faili ar 80 papildinājumiem un 28 dzēšanām
Lejupielādēt ielāpa failu Lejupielādēt izmaiņu failu Izvērst visus failus Savērst visus failus

100
arch/arm/mach-exynos/setup-usb-phy.c
Parādīt failu

@@ -26,11 +26,71 @@ static int exynos4_usb_host_phy_is_on(void)
return (readl(EXYNOS4_PHYPWR) & PHY1_STD_ANALOG_POWERDOWN) ? 0 : 1;
}
static int exynos4_usb_phy1_init(struct platform_device *pdev)
static void exynos4210_usb_phy_clkset(struct platform_device *pdev)
{
struct clk *otg_clk;
struct clk *xusbxti_clk;
u32 phyclk;
/* set clock frequency for PLL */
phyclk = readl(EXYNOS4_PHYCLK) & ~CLKSEL_MASK;
xusbxti_clk = clk_get(&pdev->dev, "xusbxti");
if (xusbxti_clk && !IS_ERR(xusbxti_clk)) {
switch (clk_get_rate(xusbxti_clk)) {
case 12 * MHZ:
phyclk |= CLKSEL_12M;
break;
case 24 * MHZ:
phyclk |= CLKSEL_24M;
break;
default:
case 48 * MHZ:
/* default reference clock */
break;
}
clk_put(xusbxti_clk);
}
writel(phyclk, EXYNOS4_PHYCLK);
}
static int exynos4210_usb_phy0_init(struct platform_device *pdev)
{
u32 rstcon;
writel(readl(S5P_USBDEVICE_PHY_CONTROL) | S5P_USBDEVICE_PHY_ENABLE,
S5P_USBDEVICE_PHY_CONTROL);
exynos4210_usb_phy_clkset(pdev);
/* set to normal PHY0 */
writel((readl(EXYNOS4_PHYPWR) & ~PHY0_NORMAL_MASK), EXYNOS4_PHYPWR);
/* reset PHY0 and Link */
rstcon = readl(EXYNOS4_RSTCON) | PHY0_SWRST_MASK;
writel(rstcon, EXYNOS4_RSTCON);
udelay(10);
rstcon &= ~PHY0_SWRST_MASK;
writel(rstcon, EXYNOS4_RSTCON);
return 0;
}
static int exynos4210_usb_phy0_exit(struct platform_device *pdev)
{
writel((readl(EXYNOS4_PHYPWR) | PHY0_ANALOG_POWERDOWN |
PHY0_OTG_DISABLE), EXYNOS4_PHYPWR);
writel(readl(S5P_USBDEVICE_PHY_CONTROL) & ~S5P_USBDEVICE_PHY_ENABLE,
S5P_USBDEVICE_PHY_CONTROL);
return 0;
}
static int exynos4210_usb_phy1_init(struct platform_device *pdev)
{
struct clk *otg_clk;
u32 rstcon;
int err;
@@ -54,27 +114,7 @@ static int exynos4_usb_phy1_init(struct platform_device *pdev)
writel(readl(S5P_USBHOST_PHY_CONTROL) | S5P_USBHOST_PHY_ENABLE,
S5P_USBHOST_PHY_CONTROL);
/* set clock frequency for PLL */
phyclk = readl(EXYNOS4_PHYCLK) & ~CLKSEL_MASK;
xusbxti_clk = clk_get(&pdev->dev, "xusbxti");
if (xusbxti_clk && !IS_ERR(xusbxti_clk)) {
switch (clk_get_rate(xusbxti_clk)) {
case 12 * MHZ:
phyclk |= CLKSEL_12M;
break;
case 24 * MHZ:
phyclk |= CLKSEL_24M;
break;
default:
case 48 * MHZ:
/* default reference clock */
break;
}
clk_put(xusbxti_clk);
}
writel(phyclk, EXYNOS4_PHYCLK);
exynos4210_usb_phy_clkset(pdev);
/* floating prevention logic: disable */
writel((readl(EXYNOS4_PHY1CON) | FPENABLEN), EXYNOS4_PHY1CON);
@@ -102,7 +142,7 @@ static int exynos4_usb_phy1_init(struct platform_device *pdev)
return 0;
}
static int exynos4_usb_phy1_exit(struct platform_device *pdev)
static int exynos4210_usb_phy1_exit(struct platform_device *pdev)
{
struct clk *otg_clk;
int err;
@@ -136,16 +176,20 @@ static int exynos4_usb_phy1_exit(struct platform_device *pdev)
int s5p_usb_phy_init(struct platform_device *pdev, int type)
{
if (type == S5P_USB_PHY_HOST)
return exynos4_usb_phy1_init(pdev);
if (type == S5P_USB_PHY_DEVICE)
return exynos4210_usb_phy0_init(pdev);
else if (type == S5P_USB_PHY_HOST)
return exynos4210_usb_phy1_init(pdev);
return -EINVAL;
}
int s5p_usb_phy_exit(struct platform_device *pdev, int type)
{
if (type == S5P_USB_PHY_HOST)
return exynos4_usb_phy1_exit(pdev);
if (type == S5P_USB_PHY_DEVICE)
return exynos4210_usb_phy0_exit(pdev);
else if (type == S5P_USB_PHY_HOST)
return exynos4210_usb_phy1_exit(pdev);
return -EINVAL;
}