| // SPDX-License-Identifier: (GPL-2.0+ OR MIT) |
| /* |
| * Copyright (c) 2019 Amlogic, Inc. All rights reserved. |
| */ |
| |
| #include <linux/module.h> |
| #include <linux/io.h> |
| #include <linux/irq.h> |
| #include <linux/irqreturn.h> |
| #include <linux/platform_device.h> |
| #include <linux/slab.h> |
| #include <linux/of.h> |
| #include <linux/clk.h> |
| #include <linux/err.h> |
| #include <linux/pm_runtime.h> |
| #include <linux/delay.h> |
| #include <linux/usb/phy.h> |
| #include <linux/amlogic/usb-v2.h> |
| #include <linux/of_gpio.h> |
| #include <linux/workqueue.h> |
| #include <linux/notifier.h> |
| #include <linux/amlogic/usbtype.h> |
| #include <linux/amlogic/power_ctrl.h> |
| #include "../phy/phy-aml-new-usb-v2.h" |
| |
| #define phy_to_m31usb(x) container_of((x), struct amlogic_usb_m31, phy) |
| |
| static int amlogic_usb3_m31_suspend(struct usb_phy *x, int suspend) |
| { |
| return 0; |
| } |
| |
| static void amlogic_usb3_m31_shutdown(struct usb_phy *x) |
| { |
| struct amlogic_usb_m31 *phy = phy_to_m31usb(x); |
| u32 val, temp, shift = 0; |
| size_t mask = 0; |
| |
| if (phy->portnum > 0) { |
| mask = (size_t)phy->reset_regs & 0xf; |
| shift = (phy->m31phy_reset_level_bit / 32) * 4; |
| temp = 1 << (phy->m31phy_reset_level_bit % 32); |
| val = readl((void __iomem *) |
| ((unsigned long)phy->reset_regs + |
| (phy->reset_level - mask) + shift)); |
| writel((val & (~temp)), (void __iomem *) |
| ((unsigned long)phy->reset_regs + |
| (phy->reset_level - mask) + shift)); |
| |
| temp = 1 << (phy->m31ctl_reset_level_bit % 32); |
| shift = (phy->m31ctl_reset_level_bit / 32) * 4; |
| val = readl((void __iomem *) |
| ((unsigned long)phy->reset_regs + |
| (phy->reset_level - mask) + shift)); |
| writel((val & (~temp)), (void __iomem *) |
| ((unsigned long)phy->reset_regs + |
| (phy->reset_level - mask) + shift)); |
| } |
| |
| phy->suspend_flag = 1; |
| } |
| |
| static int amlogic_usb3_m31_init(struct usb_phy *x) |
| { |
| struct amlogic_usb_m31 *phy = phy_to_m31usb(x); |
| u32 val, temp, shift = 0; |
| size_t mask = 0; |
| |
| if (phy->portnum > 0) { |
| mask = (size_t)phy->reset_regs & 0xf; |
| temp = 1 << (phy->m31phy_reset_level_bit % 32); |
| shift = (phy->m31phy_reset_level_bit / 32) * 4; |
| val = readl((void __iomem *) |
| ((unsigned long)phy->reset_regs + |
| (phy->reset_level - mask) + shift)); |
| writel((val | (temp)), (void __iomem *) |
| ((unsigned long)phy->reset_regs + |
| (phy->reset_level - mask) + shift)); |
| |
| temp = 1 << (phy->m31ctl_reset_level_bit % 32); |
| shift = (phy->m31ctl_reset_level_bit / 32) * 4; |
| val = readl((void __iomem *) |
| ((unsigned long)phy->reset_regs + |
| (phy->reset_level - mask) + shift)); |
| writel((val | (temp)), (void __iomem *) |
| ((unsigned long)phy->reset_regs + |
| (phy->reset_level - mask) + shift)); |
| } |
| |
| if (phy->suspend_flag) { |
| phy->suspend_flag = 0; |
| return 0; |
| } |
| |
| return 0; |
| } |
| |
| static bool device_is_available(const struct device_node *device) |
| { |
| const char *status; |
| int statlen; |
| |
| if (!device) |
| return false; |
| |
| status = of_get_property(device, "status", &statlen); |
| if (!status) |
| return true; |
| |
| if (statlen > 0) { |
| if (!strcmp(status, "okay") || !strcmp(status, "ok")) |
| return true; |
| } |
| |
| return false; |
| } |
| |
| static int amlogic_usb3_m31_probe(struct platform_device *pdev) |
| { |
| struct amlogic_usb_m31 *phy; |
| struct device *dev = &pdev->dev; |
| const void *prop; |
| int portnum = 0; |
| int ret; |
| struct device_node *tsi_pci; |
| void __iomem *phy3_base; |
| void __iomem *reset_base = NULL; |
| unsigned int phy3_mem; |
| unsigned int phy3_mem_size = 0; |
| union phy_m31_r0 r0; |
| struct resource *reset_mem; |
| u32 reset_level = 0x84; |
| u32 m31phy_reset_level_bit; |
| u32 m31ctl_reset_level_bit; |
| u32 val; |
| int uncomposite; |
| |
| prop = of_get_property(dev->of_node, "portnum", NULL); |
| if (prop) |
| portnum = of_read_ulong(prop, 1); |
| |
| if (!portnum) |
| dev_err(&pdev->dev, "This phy has no usb port\n"); |
| |
| prop = of_get_property(dev->of_node, "uncomposite", NULL); |
| if (prop) |
| uncomposite = of_read_ulong(prop, 1); |
| else |
| uncomposite = 0; |
| |
| if (uncomposite == 0) { |
| tsi_pci = of_find_node_by_type(NULL, "pci"); |
| if (tsi_pci) { |
| if (device_is_available(tsi_pci)) { |
| dev_info(&pdev->dev, |
| "pci-e driver probe, disable USB 3.0 function!!!\n"); |
| portnum = 0; |
| } |
| } |
| } |
| |
| ret = of_property_read_u32(dev->of_node, "phy-reg", &phy3_mem); |
| if (ret < 0) |
| return -EINVAL; |
| |
| ret = of_property_read_u32 |
| (dev->of_node, "phy-reg-size", &phy3_mem_size); |
| if (ret < 0) |
| return -EINVAL; |
| |
| phy3_base = devm_ioremap_nocache |
| (&pdev->dev, (resource_size_t)phy3_mem, |
| (unsigned long)phy3_mem_size); |
| if (!phy3_base) |
| return -ENOMEM; |
| |
| phy = devm_kzalloc(&pdev->dev, sizeof(*phy), GFP_KERNEL); |
| if (!phy) |
| return -ENOMEM; |
| |
| reset_mem = platform_get_resource(pdev, IORESOURCE_MEM, 0); |
| if (reset_mem) { |
| reset_base = ioremap(reset_mem->start, |
| resource_size(reset_mem)); |
| if (IS_ERR(reset_base)) |
| return PTR_ERR(reset_base); |
| } |
| |
| prop = of_get_property(dev->of_node, "reset-level", NULL); |
| if (prop) |
| reset_level = of_read_ulong(prop, 1); |
| else |
| reset_level = 0x84; |
| prop = of_get_property(dev->of_node, "m31phy-reset-level-bit", NULL); |
| if (prop) |
| m31phy_reset_level_bit = of_read_ulong(prop, 1); |
| else |
| m31phy_reset_level_bit = 13; |
| |
| prop = of_get_property(dev->of_node, "m31ctl-reset-level-bit", NULL); |
| if (prop) |
| m31ctl_reset_level_bit = of_read_ulong(prop, 1); |
| else |
| m31ctl_reset_level_bit = 6; |
| |
| phy->dev = dev; |
| phy->portnum = portnum; |
| phy->suspend_flag = 0; |
| phy->phy.dev = phy->dev; |
| phy->phy3_cfg = phy3_base; |
| phy->phy.label = "amlogic-usbm31phy3"; |
| phy->phy.init = amlogic_usb3_m31_init; |
| phy->phy.set_suspend = amlogic_usb3_m31_suspend; |
| phy->phy.shutdown = amlogic_usb3_m31_shutdown; |
| phy->phy.type = USB_PHY_TYPE_USB3; |
| phy->phy.flags = AML_USB3_PHY_DISABLE; |
| phy->reset_regs = reset_base; |
| phy->reset_level = reset_level; |
| phy->m31phy_reset_level_bit = m31phy_reset_level_bit; |
| phy->m31ctl_reset_level_bit = m31ctl_reset_level_bit; |
| |
| /* set the phy from pcie to usb3 */ |
| if (phy->portnum > 0) { |
| writel(0x1, phy->phy3_cfg + 0x8); |
| usleep_range(90, 100); |
| |
| writel(0, phy->phy3_cfg + 0xc); |
| usleep_range(90, 100); |
| |
| if (uncomposite) { |
| val = readl(phy->phy3_cfg + 0x82c); |
| val |= (1 << 5); |
| writel(val, phy->phy3_cfg + 0x82c); |
| usleep_range(90, 100); |
| |
| val = readl(phy->phy3_cfg + 0x848); |
| val |= (3 << 0); |
| writel(val, phy->phy3_cfg + 0x848); |
| usleep_range(90, 100); |
| } |
| |
| r0.d32 = readl(phy->phy3_cfg); |
| r0.b.PHY_SEL = 0; |
| r0.b.U3_HOST_PHY = 1; |
| r0.b.PCIE_CLKSEL = 0; |
| r0.b.U3_SSRX_SEL = 1; |
| r0.b.U3_SSTX_SEL = 1; |
| r0.b.REFPAD_EXT_100M_EN = 0; |
| r0.b.TX_ENABLE_N = 1; |
| r0.b.TX_SE0 = 0; |
| r0.b.FSLSSERIALMODE = 0; |
| |
| writel(r0.d32, phy->phy3_cfg); |
| usleep_range(90, 100); |
| |
| phy->phy.flags = AML_USB3_PHY_ENABLE; |
| } |
| |
| usb_add_phy_dev(&phy->phy); |
| |
| platform_set_drvdata(pdev, phy); |
| |
| pm_runtime_enable(phy->dev); |
| |
| return 0; |
| } |
| |
| static int amlogic_usb3_m31_remove(struct platform_device *pdev) |
| { |
| return 0; |
| } |
| |
| #ifdef CONFIG_PM_RUNTIME |
| static int amlogic_usb3_m31_runtime_suspend(struct device *dev) |
| { |
| return 0; |
| } |
| |
| static int amlogic_usb3_m31_runtime_resume(struct device *dev) |
| { |
| u32 ret = 0; |
| |
| return ret; |
| } |
| |
| static const struct dev_pm_ops amlogic_usb3_m31_pm_ops = { |
| SET_RUNTIME_PM_OPS(amlogic_usb3_m31_runtime_suspend, |
| amlogic_usb3_m31_runtime_resume, |
| NULL) |
| }; |
| |
| #define DEV_PM_OPS (&amlogic_usb3_m31_pm_ops) |
| #else |
| #define DEV_PM_OPS NULL |
| #endif |
| |
| #ifdef CONFIG_OF |
| static const struct of_device_id amlogic_usb3_m31_id_table[] = { |
| { .compatible = "amlogic, amlogic-usb3-m31-phy" }, |
| {} |
| }; |
| MODULE_DEVICE_TABLE(of, amlogic_usb3_m31_id_table); |
| #endif |
| |
| static struct platform_driver amlogic_usb3_m31_driver = { |
| .probe = amlogic_usb3_m31_probe, |
| .remove = amlogic_usb3_m31_remove, |
| .driver = { |
| .name = "amlogic-usb3-m31-phy", |
| .owner = THIS_MODULE, |
| .pm = DEV_PM_OPS, |
| .of_match_table = of_match_ptr(amlogic_usb3_m31_id_table), |
| }, |
| }; |
| |
| module_platform_driver(amlogic_usb3_m31_driver); |
| |
| MODULE_ALIAS("platform: amlogic_usb3_m31"); |
| MODULE_AUTHOR("Amlogic Inc."); |
| MODULE_DESCRIPTION("amlogic USB3 m31 phy driver"); |
| MODULE_LICENSE("GPL v2"); |