| // 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/amlogic/aml_gpio_consumer.h> |
| #include <linux/workqueue.h> |
| #include <linux/notifier.h> |
| #include <linux/amlogic/usbtype.h> |
| #include "../phy/phy-aml-new-usb-v2.h" |
| |
| #define HOST_MODE 0 |
| #define DEVICE_MODE 1 |
| |
| struct usb_aml_regs_v2 usb_otg_aml_regs; |
| struct amlogic_otg *g_otg; |
| |
| struct amlogic_otg { |
| struct device *dev; |
| void __iomem *phy3_cfg; |
| void __iomem *phy3_cfg_r1; |
| void __iomem *phy3_cfg_r2; |
| void __iomem *phy3_cfg_r4; |
| void __iomem *phy3_cfg_r5; |
| void __iomem *usb2_phy_cfg; |
| /* Set VBus Power though GPIO */ |
| int vbus_power_pin; |
| int vbus_power_pin_work_mask; |
| struct delayed_work work; |
| struct gpio_desc *usb_gpio_desc; |
| }; |
| |
| static void set_mode(unsigned long reg_addr, int mode); |
| BLOCKING_NOTIFIER_HEAD(aml_new_otg_notifier_list); |
| |
| int aml_new_otg_register_notifier(struct notifier_block *nb) |
| { |
| int ret; |
| |
| ret = blocking_notifier_chain_register |
| (&aml_new_otg_notifier_list, nb); |
| |
| return ret; |
| } |
| EXPORT_SYMBOL(aml_new_otg_register_notifier); |
| |
| int aml_new_otg_unregister_notifier(struct notifier_block *nb) |
| { |
| int ret; |
| |
| ret = blocking_notifier_chain_unregister |
| (&aml_new_otg_notifier_list, nb); |
| |
| return ret; |
| } |
| EXPORT_SYMBOL(aml_new_otg_unregister_notifier); |
| |
| static void aml_new_usb_notifier_call(unsigned long is_device_on) |
| { |
| blocking_notifier_call_chain |
| (&aml_new_otg_notifier_list, is_device_on, NULL); |
| } |
| |
| static void set_usb_vbus_power |
| (struct gpio_desc *usb_gd, int pin, char is_power_on) |
| { |
| if (is_power_on) |
| /*set vbus on by gpio*/ |
| gpiod_direction_output(usb_gd, 1); |
| else |
| /*set vbus off by gpio first*/ |
| gpiod_direction_output(usb_gd, 0); |
| } |
| |
| static void amlogic_new_set_vbus_power |
| (struct amlogic_otg *phy, char is_power_on) |
| { |
| if (phy->vbus_power_pin != -1) |
| set_usb_vbus_power(phy->usb_gpio_desc, |
| phy->vbus_power_pin, is_power_on); |
| } |
| |
| void aml_new_otg_init(void) |
| { |
| union usb_r5_v2 r5 = {.d32 = 0}; |
| unsigned long reg_addr; |
| |
| if (!g_otg) |
| return; |
| |
| reg_addr = (unsigned long)g_otg->usb2_phy_cfg; |
| |
| r5.d32 = readl(usb_otg_aml_regs.usb_r_v2[5]); |
| if (r5.b.iddig_curr == 0) { |
| amlogic_new_set_vbus_power(g_otg, 1); |
| aml_new_usb_notifier_call(0); |
| set_mode(reg_addr, HOST_MODE); |
| } |
| } |
| EXPORT_SYMBOL(aml_new_otg_init); |
| |
| int aml_new_otg_get_mode(void) |
| { |
| union usb_r5_v2 r5 = {.d32 = 0}; |
| |
| r5.d32 = readl(usb_otg_aml_regs.usb_r_v2[5]); |
| if (r5.b.iddig_curr == 0) |
| return 0; |
| else |
| return 1; |
| } |
| EXPORT_SYMBOL(aml_new_otg_get_mode); |
| |
| static int amlogic_new_otg_init(struct amlogic_otg *phy) |
| { |
| union usb_r1_v2 r1 = {.d32 = 0}; |
| union usb_r5_v2 r5 = {.d32 = 0}; |
| int i = 0; |
| |
| for (i = 0; i < 6; i++) { |
| usb_otg_aml_regs.usb_r_v2[i] = (void __iomem *) |
| ((unsigned long)phy->usb2_phy_cfg + 0x80 + 4 * i); |
| } |
| |
| r1.d32 = readl(usb_otg_aml_regs.usb_r_v2[1]); |
| r1.b.u3h_fladj_30mhz_reg = 0x20; |
| writel(r1.d32, usb_otg_aml_regs.usb_r_v2[1]); |
| |
| r5.d32 = readl(usb_otg_aml_regs.usb_r_v2[5]); |
| r5.b.iddig_en0 = 1; |
| r5.b.iddig_en1 = 1; |
| r5.b.iddig_th = 255; |
| writel(r5.d32, usb_otg_aml_regs.usb_r_v2[5]); |
| |
| return 0; |
| } |
| |
| static void set_mode(unsigned long reg_addr, int mode) |
| { |
| struct u2p_aml_regs_v2 u2p_aml_regs; |
| struct usb_aml_regs_v2 usb_gxl_aml_regs; |
| union u2p_r0_v2 reg0; |
| union usb_r0_v2 r0 = {.d32 = 0}; |
| union usb_r4_v2 r4 = {.d32 = 0}; |
| |
| u2p_aml_regs.u2p_r_v2[0] = (void __iomem *) |
| ((unsigned long)reg_addr + PHY_REGISTER_SIZE); |
| |
| usb_gxl_aml_regs.usb_r_v2[0] = (void __iomem *) |
| ((unsigned long)reg_addr + 4 * PHY_REGISTER_SIZE |
| + 4 * 0); |
| usb_gxl_aml_regs.usb_r_v2[1] = (void __iomem *) |
| ((unsigned long)reg_addr + 4 * PHY_REGISTER_SIZE |
| + 4 * 1); |
| usb_gxl_aml_regs.usb_r_v2[4] = (void __iomem *) |
| ((unsigned long)reg_addr + 4 * PHY_REGISTER_SIZE |
| + 4 * 4); |
| |
| r0.d32 = readl(usb_gxl_aml_regs.usb_r_v2[0]); |
| if (mode == DEVICE_MODE) { |
| r0.b.u2d_act = 1; |
| r0.b.u2d_ss_scaledown_mode = 0; |
| } else { |
| r0.b.u2d_act = 0; |
| } |
| writel(r0.d32, usb_gxl_aml_regs.usb_r_v2[0]); |
| |
| r4.d32 = readl(usb_gxl_aml_regs.usb_r_v2[4]); |
| if (mode == DEVICE_MODE) |
| r4.b.p21_SLEEPM0 = 0x1; |
| else |
| r4.b.p21_SLEEPM0 = 0x0; |
| writel(r4.d32, usb_gxl_aml_regs.usb_r_v2[4]); |
| |
| reg0.d32 = readl(u2p_aml_regs.u2p_r_v2[0]); |
| if (mode == DEVICE_MODE) { |
| reg0.b.host_device = 0; |
| reg0.b.POR = 0; |
| } else { |
| reg0.b.host_device = 1; |
| reg0.b.POR = 0; |
| } |
| writel(reg0.d32, u2p_aml_regs.u2p_r_v2[0]); |
| |
| usleep_range(500, 600); |
| } |
| |
| static void amlogic_gxl_work(struct work_struct *work) |
| { |
| struct amlogic_otg *phy = |
| container_of(work, struct amlogic_otg, work.work); |
| union usb_r5_v2 r5 = {.d32 = 0}; |
| unsigned long reg_addr = ((unsigned long)phy->usb2_phy_cfg); |
| |
| r5.d32 = readl(usb_otg_aml_regs.usb_r_v2[5]); |
| if (r5.b.iddig_curr == 0) { |
| amlogic_new_set_vbus_power(phy, 1); |
| aml_new_usb_notifier_call(0); |
| set_mode(reg_addr, HOST_MODE); |
| } else { |
| set_mode(reg_addr, DEVICE_MODE); |
| aml_new_usb_notifier_call(1); |
| amlogic_new_set_vbus_power(phy, 0); |
| } |
| r5.b.usb_iddig_irq = 0; |
| writel(r5.d32, usb_otg_aml_regs.usb_r_v2[5]); |
| } |
| |
| static irqreturn_t amlogic_botg_detect_irq(int irq, void *dev) |
| { |
| struct amlogic_otg *phy = (struct amlogic_otg *)dev; |
| union usb_r5_v2 r5 = {.d32 = 0}; |
| |
| r5.d32 = readl(usb_otg_aml_regs.usb_r_v2[5]); |
| r5.b.usb_iddig_irq = 0; |
| writel(r5.d32, usb_otg_aml_regs.usb_r_v2[5]); |
| |
| schedule_delayed_work(&phy->work, msecs_to_jiffies(10)); |
| |
| return IRQ_HANDLED; |
| } |
| |
| static int amlogic_new_otg_probe(struct platform_device *pdev) |
| { |
| struct amlogic_otg *phy; |
| struct device *dev = &pdev->dev; |
| void __iomem *usb2_phy_base; |
| unsigned int usb2_phy_mem; |
| unsigned int usb2_phy_mem_size = 0; |
| const char *gpio_name = NULL; |
| struct gpio_desc *usb_gd = NULL; |
| const void *prop; |
| int irq; |
| int retval; |
| int gpio_vbus_power_pin = -1; |
| int otg = 0; |
| |
| gpio_name = of_get_property(dev->of_node, "gpio-vbus-power", NULL); |
| if (gpio_name) { |
| gpio_vbus_power_pin = 1; |
| usb_gd = gpiod_get_index(&pdev->dev, |
| NULL, 0, GPIOD_OUT_LOW); |
| if (IS_ERR(usb_gd)) |
| return -1; |
| } |
| |
| prop = of_get_property(dev->of_node, "otg", NULL); |
| if (prop) |
| otg = of_read_ulong(prop, 1); |
| |
| retval = of_property_read_u32 |
| (dev->of_node, "usb2-phy-reg", &usb2_phy_mem); |
| if (retval < 0) |
| return -EINVAL; |
| |
| retval = of_property_read_u32 |
| (dev->of_node, "usb2-phy-reg-size", &usb2_phy_mem_size); |
| if (retval < 0) |
| return -EINVAL; |
| |
| usb2_phy_base = devm_ioremap_nocache |
| (&pdev->dev, (resource_size_t)usb2_phy_mem, |
| (unsigned long)usb2_phy_mem_size); |
| if (!usb2_phy_base) |
| return -ENOMEM; |
| |
| phy = devm_kzalloc(&pdev->dev, sizeof(*phy), GFP_KERNEL); |
| if (!phy) |
| return -ENOMEM; |
| |
| if (otg) { |
| irq = platform_get_irq(pdev, 0); |
| if (irq < 0) |
| return -ENODEV; |
| retval = request_irq(irq, amlogic_botg_detect_irq, |
| IRQF_SHARED | IRQ_LEVEL, |
| "amlogic_botg_detect", phy); |
| |
| if (retval) { |
| dev_err(&pdev->dev, "request of irq%d failed\n", irq); |
| retval = -EBUSY; |
| return retval; |
| } |
| } |
| |
| dev_info(&pdev->dev, "phy_mem:0x%lx, iomap phy_base:0x%lx\n", |
| (unsigned long)usb2_phy_mem, |
| (unsigned long)usb2_phy_base); |
| |
| phy->dev = dev; |
| phy->usb2_phy_cfg = usb2_phy_base; |
| phy->vbus_power_pin = gpio_vbus_power_pin; |
| phy->usb_gpio_desc = usb_gd; |
| |
| INIT_DELAYED_WORK(&phy->work, amlogic_gxl_work); |
| |
| platform_set_drvdata(pdev, phy); |
| |
| pm_runtime_enable(phy->dev); |
| g_otg = phy; |
| |
| amlogic_new_otg_init(phy); |
| |
| return 0; |
| } |
| |
| static int amlogic_new_otg_remove(struct platform_device *pdev) |
| { |
| return 0; |
| } |
| |
| #ifdef CONFIG_PM_RUNTIME |
| |
| static int amlogic_new_otg_runtime_suspend(struct device *dev) |
| { |
| return 0; |
| } |
| |
| static int amlogic_new_otg_runtime_resume(struct device *dev) |
| { |
| u32 ret = 0; |
| |
| return ret; |
| } |
| |
| static const struct dev_pm_ops amlogic_new_otg_pm_ops = { |
| SET_RUNTIME_PM_OPS(amlogic_new_otg_runtime_suspend, |
| amlogic_new_otg_runtime_resume, |
| NULL) |
| }; |
| |
| #define DEV_PM_OPS (&amlogic_new_otg_pm_ops) |
| #else |
| #define DEV_PM_OPS NULL |
| #endif |
| |
| #ifdef CONFIG_OF |
| static const struct of_device_id amlogic_new_otg_id_table[] = { |
| { .compatible = "amlogic, amlogic-new-otg" }, |
| {} |
| }; |
| MODULE_DEVICE_TABLE(of, amlogic_new_otg_id_table); |
| #endif |
| |
| static struct platform_driver amlogic_new_otg_driver = { |
| .probe = amlogic_new_otg_probe, |
| .remove = amlogic_new_otg_remove, |
| .driver = { |
| .name = "amlogic-new-otg", |
| .owner = THIS_MODULE, |
| .pm = DEV_PM_OPS, |
| .of_match_table = of_match_ptr(amlogic_new_otg_id_table), |
| }, |
| }; |
| |
| module_platform_driver(amlogic_new_otg_driver); |
| |
| MODULE_ALIAS("platform: amlogic_usb3_v2"); |
| MODULE_AUTHOR("Amlogic Inc."); |
| MODULE_DESCRIPTION("amlogic USB3 v2 phy driver"); |
| MODULE_LICENSE("GPL v2"); |