diff options
Diffstat (limited to 'arch/arm/mach-omap2/omap_phy_internal.c')
| -rw-r--r-- | arch/arm/mach-omap2/omap_phy_internal.c | 122 |
1 files changed, 115 insertions, 7 deletions
diff --git a/arch/arm/mach-omap2/omap_phy_internal.c b/arch/arm/mach-omap2/omap_phy_internal.c index 745252c60e3..e2e605fe913 100644 --- a/arch/arm/mach-omap2/omap_phy_internal.c +++ b/arch/arm/mach-omap2/omap_phy_internal.c @@ -29,6 +29,7 @@ #include <linux/usb.h> #include <plat/usb.h> +#include "control.h" /* OMAP control module register for UTMI PHY */ #define CONTROL_DEV_CONF 0x300 @@ -43,6 +44,7 @@ static struct clk *phyclk, *clk48m, *clk32k; static void __iomem *ctrl_base; +static int usbotghs_control; int omap4430_phy_init(struct device *dev) { @@ -103,13 +105,6 @@ int omap4430_phy_set_clk(struct device *dev, int on) int omap4430_phy_power(struct device *dev, int ID, int on) { if (on) { - /* enabled the clocks */ - omap4430_phy_set_clk(dev, 1); - /* power on the phy */ - if (__raw_readl(ctrl_base + CONTROL_DEV_CONF) & PHY_PD) { - __raw_writel(~PHY_PD, ctrl_base + CONTROL_DEV_CONF); - mdelay(200); - } if (ID) /* enable VBUS valid, IDDIG groung */ __raw_writel(AVALID | VBUSVALID, ctrl_base + @@ -125,10 +120,31 @@ int omap4430_phy_power(struct device *dev, int ID, int on) /* Enable session END and IDIG to high impedence. */ __raw_writel(SESSEND | IDDIG, ctrl_base + USBOTGHS_CONTROL); + } + return 0; +} + +int omap4430_phy_suspend(struct device *dev, int suspend) +{ + if (suspend) { /* Disable the clocks */ omap4430_phy_set_clk(dev, 0); /* Power down the phy */ __raw_writel(PHY_PD, ctrl_base + CONTROL_DEV_CONF); + + /* save the context */ + usbotghs_control = __raw_readl(ctrl_base + USBOTGHS_CONTROL); + } else { + /* Enable the internel phy clcoks */ + omap4430_phy_set_clk(dev, 1); + /* power on the phy */ + if (__raw_readl(ctrl_base + CONTROL_DEV_CONF) & PHY_PD) { + __raw_writel(~PHY_PD, ctrl_base + CONTROL_DEV_CONF); + mdelay(200); + } + + /* restore the context */ + __raw_writel(usbotghs_control, ctrl_base + USBOTGHS_CONTROL); } return 0; @@ -147,3 +163,95 @@ int omap4430_phy_exit(struct device *dev) return 0; } + +void am35x_musb_reset(void) +{ + u32 regval; + + /* Reset the musb interface */ + regval = omap_ctrl_readl(AM35XX_CONTROL_IP_SW_RESET); + + regval |= AM35XX_USBOTGSS_SW_RST; + omap_ctrl_writel(regval, AM35XX_CONTROL_IP_SW_RESET); + + regval &= ~AM35XX_USBOTGSS_SW_RST; + omap_ctrl_writel(regval, AM35XX_CONTROL_IP_SW_RESET); + + regval = omap_ctrl_readl(AM35XX_CONTROL_IP_SW_RESET); +} + +void am35x_musb_phy_power(u8 on) +{ + unsigned long timeout = jiffies + msecs_to_jiffies(100); + u32 devconf2; + + if (on) { + /* + * Start the on-chip PHY and its PLL. + */ + devconf2 = omap_ctrl_readl(AM35XX_CONTROL_DEVCONF2); + + devconf2 &= ~(CONF2_RESET | CONF2_PHYPWRDN | CONF2_OTGPWRDN); + devconf2 |= CONF2_PHY_PLLON; + + omap_ctrl_writel(devconf2, AM35XX_CONTROL_DEVCONF2); + + pr_info(KERN_INFO "Waiting for PHY clock good...\n"); + while (!(omap_ctrl_readl(AM35XX_CONTROL_DEVCONF2) + & CONF2_PHYCLKGD)) { + cpu_relax(); + + if (time_after(jiffies, timeout)) { + pr_err(KERN_ERR "musb PHY clock good timed out\n"); + break; + } + } + } else { + /* + * Power down the on-chip PHY. + */ + devconf2 = omap_ctrl_readl(AM35XX_CONTROL_DEVCONF2); + + devconf2 &= ~CONF2_PHY_PLLON; + devconf2 |= CONF2_PHYPWRDN | CONF2_OTGPWRDN; + omap_ctrl_writel(devconf2, AM35XX_CONTROL_DEVCONF2); + } +} + +void am35x_musb_clear_irq(void) +{ + u32 regval; + + regval = omap_ctrl_readl(AM35XX_CONTROL_LVL_INTR_CLEAR); + regval |= AM35XX_USBOTGSS_INT_CLR; + omap_ctrl_writel(regval, AM35XX_CONTROL_LVL_INTR_CLEAR); + regval = omap_ctrl_readl(AM35XX_CONTROL_LVL_INTR_CLEAR); +} + +void am35x_musb_set_mode(u8 musb_mode) +{ + u32 devconf2 = omap_ctrl_readl(AM35XX_CONTROL_DEVCONF2); + + devconf2 &= ~CONF2_OTGMODE; + switch (musb_mode) { +#ifdef CONFIG_USB_MUSB_HDRC_HCD + case MUSB_HOST: /* Force VBUS valid, ID = 0 */ + devconf2 |= CONF2_FORCE_HOST; + break; +#endif +#ifdef CONFIG_USB_GADGET_MUSB_HDRC + case MUSB_PERIPHERAL: /* Force VBUS valid, ID = 1 */ + devconf2 |= CONF2_FORCE_DEVICE; + break; +#endif +#ifdef CONFIG_USB_MUSB_OTG + case MUSB_OTG: /* Don't override the VBUS/ID comparators */ + devconf2 |= CONF2_NO_OVERRIDE; + break; +#endif + default: + pr_info(KERN_INFO "Unsupported mode %u\n", musb_mode); + } + + omap_ctrl_writel(devconf2, AM35XX_CONTROL_DEVCONF2); +} |