169 lines
3.4 KiB
C
169 lines
3.4 KiB
C
#include <common.h>
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#include <init.h>
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#include <io.h>
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#include <linux/err.h>
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struct phy_control {
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void (*phy_power)(struct phy_control *phy_ctrl, u32 id, bool on);
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void (*phy_wkup)(struct phy_control *phy_ctrl, u32 id, bool on);
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};
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struct am335x_control_usb {
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struct device_d *dev;
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void __iomem *phy_reg;
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void __iomem *wkup;
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spinlock_t lock;
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struct phy_control phy_ctrl;
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};
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#define AM335X_USB0_CTRL 0x0
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#define AM335X_USB1_CTRL 0x8
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#define AM335x_USB_WKUP 0x0
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#define USBPHY_CM_PWRDN (1 << 0)
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#define USBPHY_OTG_PWRDN (1 << 1)
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#define USBPHY_OTGVDET_EN (1 << 19)
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#define USBPHY_OTGSESSEND_EN (1 << 20)
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#define AM335X_PHY0_WK_EN (1 << 0)
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#define AM335X_PHY1_WK_EN (1 << 8)
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static void am335x_phy_wkup(struct phy_control *phy_ctrl, u32 id, bool on)
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{
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struct am335x_control_usb *usb_ctrl;
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u32 val;
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u32 reg;
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usb_ctrl = container_of(phy_ctrl, struct am335x_control_usb, phy_ctrl);
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switch (id) {
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case 0:
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reg = AM335X_PHY0_WK_EN;
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break;
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case 1:
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reg = AM335X_PHY1_WK_EN;
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break;
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default:
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WARN_ON(1);
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return;
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}
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spin_lock(&usb_ctrl->lock);
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val = readl(usb_ctrl->wkup);
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if (on)
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val |= reg;
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else
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val &= ~reg;
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writel(val, usb_ctrl->wkup);
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spin_unlock(&usb_ctrl->lock);
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}
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static void am335x_phy_power(struct phy_control *phy_ctrl, u32 id, bool on)
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{
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struct am335x_control_usb *usb_ctrl;
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u32 val;
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u32 reg;
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usb_ctrl = container_of(phy_ctrl, struct am335x_control_usb, phy_ctrl);
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switch (id) {
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case 0:
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reg = AM335X_USB0_CTRL;
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break;
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case 1:
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reg = AM335X_USB1_CTRL;
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break;
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default:
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WARN_ON(1);
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return;
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}
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val = readl(usb_ctrl->phy_reg + reg);
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if (on) {
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val &= ~(USBPHY_CM_PWRDN | USBPHY_OTG_PWRDN);
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val |= USBPHY_OTGVDET_EN | USBPHY_OTGSESSEND_EN;
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} else {
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val |= USBPHY_CM_PWRDN | USBPHY_OTG_PWRDN;
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}
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writel(val, usb_ctrl->phy_reg + reg);
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}
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static const struct phy_control ctrl_am335x = {
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.phy_power = am335x_phy_power,
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.phy_wkup = am335x_phy_wkup,
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};
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static __maybe_unused struct of_device_id omap_control_usb_dt_ids[] = {
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{
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.compatible = "ti,am335x-usb-ctrl-module", .data = &ctrl_am335x
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}, {
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/* sentinel */
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},
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};
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struct phy_control *am335x_get_phy_control(struct device_d *dev)
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{
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struct device_node *node;
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struct am335x_control_usb *ctrl_usb;
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node = of_parse_phandle(dev->device_node, "ti,ctrl_mod", 0);
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if (!node)
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return NULL;
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dev = of_find_device_by_node(node);
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if (!dev)
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return NULL;
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ctrl_usb = dev->priv;
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if (!ctrl_usb)
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return NULL;
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return &ctrl_usb->phy_ctrl;
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}
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EXPORT_SYMBOL(am335x_get_phy_control);
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static int am335x_control_usb_probe(struct device_d *dev)
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{
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/*struct resource *res;*/
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struct am335x_control_usb *ctrl_usb;
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const struct phy_control *phy_ctrl;
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int ret;
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ret = dev_get_drvdata(dev, (const void **)&phy_ctrl);
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if (ret)
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return ret;
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ctrl_usb = xzalloc(sizeof(*ctrl_usb));
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if (!ctrl_usb) {
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dev_err(dev, "unable to alloc memory for control usb\n");
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return -ENOMEM;
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}
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ctrl_usb->dev = dev;
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ctrl_usb->phy_reg = dev_request_mem_region(dev, 0);
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if (IS_ERR(ctrl_usb->phy_reg))
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return PTR_ERR(ctrl_usb->phy_reg);
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ctrl_usb->wkup = dev_request_mem_region(dev, 1);
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if (IS_ERR(ctrl_usb->wkup))
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return PTR_ERR(ctrl_usb->wkup);
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spin_lock_init(&ctrl_usb->lock);
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ctrl_usb->phy_ctrl = *phy_ctrl;
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dev->priv = ctrl_usb;
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return 0;
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};
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static struct driver_d am335x_control_driver = {
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.name = "am335x-control-usb",
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.probe = am335x_control_usb_probe,
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.of_compatible = DRV_OF_COMPAT(omap_control_usb_dt_ids),
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};
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device_platform_driver(am335x_control_driver);
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