1 // SPDX-License-Identifier: GPL-2.0
3 * Copyright (C) 2016 MediaTek Inc.
5 * Author: Chunfeng Yun <chunfeng.yun@mediatek.com>
8 #include <linux/dma-mapping.h>
9 #include <linux/iopoll.h>
10 #include <linux/kernel.h>
11 #include <linux/module.h>
12 #include <linux/of_address.h>
13 #include <linux/of_irq.h>
14 #include <linux/platform_device.h>
15 #include <linux/pm_wakeirq.h>
19 #include "mtu3_debug.h"
21 /* u2-port0 should be powered on and enabled; */
22 int ssusb_check_clocks(struct ssusb_mtk *ssusb, u32 ex_clks)
24 void __iomem *ibase = ssusb->ippc_base;
28 check_val = ex_clks | SSUSB_SYS125_RST_B_STS | SSUSB_SYSPLL_STABLE |
31 ret = readl_poll_timeout(ibase + U3D_SSUSB_IP_PW_STS1, value,
32 (check_val == (value & check_val)), 100, 20000);
34 dev_err(ssusb->dev, "clks of sts1 are not stable!\n");
38 ret = readl_poll_timeout(ibase + U3D_SSUSB_IP_PW_STS2, value,
39 (value & SSUSB_U2_MAC_SYS_RST_B_STS), 100, 10000);
41 dev_err(ssusb->dev, "mac2 clock is not stable\n");
48 static int wait_for_ip_sleep(struct ssusb_mtk *ssusb)
50 bool sleep_check = true;
55 sleep_check = ssusb_gadget_ip_sleep_check(ssusb);
60 /* wait for ip enter sleep mode */
61 ret = readl_poll_timeout(ssusb->ippc_base + U3D_SSUSB_IP_PW_STS1, value,
62 (value & SSUSB_IP_SLEEP_STS), 100, 100000);
64 dev_err(ssusb->dev, "ip sleep failed!!!\n");
71 static int ssusb_phy_init(struct ssusb_mtk *ssusb)
76 for (i = 0; i < ssusb->num_phys; i++) {
77 ret = phy_init(ssusb->phys[i]);
85 phy_exit(ssusb->phys[i - 1]);
90 static int ssusb_phy_exit(struct ssusb_mtk *ssusb)
94 for (i = 0; i < ssusb->num_phys; i++)
95 phy_exit(ssusb->phys[i]);
100 static int ssusb_phy_power_on(struct ssusb_mtk *ssusb)
105 for (i = 0; i < ssusb->num_phys; i++) {
106 ret = phy_power_on(ssusb->phys[i]);
114 phy_power_off(ssusb->phys[i - 1]);
119 static void ssusb_phy_power_off(struct ssusb_mtk *ssusb)
123 for (i = 0; i < ssusb->num_phys; i++)
124 phy_power_off(ssusb->phys[i]);
127 static int ssusb_rscs_init(struct ssusb_mtk *ssusb)
131 ret = regulator_enable(ssusb->vusb33);
133 dev_err(ssusb->dev, "failed to enable vusb33\n");
137 ret = clk_bulk_prepare_enable(BULK_CLKS_CNT, ssusb->clks);
141 ret = ssusb_phy_init(ssusb);
143 dev_err(ssusb->dev, "failed to init phy\n");
147 ret = ssusb_phy_power_on(ssusb);
149 dev_err(ssusb->dev, "failed to power on phy\n");
156 ssusb_phy_exit(ssusb);
158 clk_bulk_disable_unprepare(BULK_CLKS_CNT, ssusb->clks);
160 regulator_disable(ssusb->vusb33);
165 static void ssusb_rscs_exit(struct ssusb_mtk *ssusb)
167 clk_bulk_disable_unprepare(BULK_CLKS_CNT, ssusb->clks);
168 regulator_disable(ssusb->vusb33);
169 ssusb_phy_power_off(ssusb);
170 ssusb_phy_exit(ssusb);
173 static void ssusb_ip_sw_reset(struct ssusb_mtk *ssusb)
175 /* reset whole ip (xhci & u3d) */
176 mtu3_setbits(ssusb->ippc_base, U3D_SSUSB_IP_PW_CTRL0, SSUSB_IP_SW_RST);
178 mtu3_clrbits(ssusb->ippc_base, U3D_SSUSB_IP_PW_CTRL0, SSUSB_IP_SW_RST);
181 * device ip may be powered on in firmware/BROM stage before entering
183 * power down device ip, otherwise ip-sleep will fail when working as
186 mtu3_setbits(ssusb->ippc_base, U3D_SSUSB_IP_PW_CTRL2, SSUSB_IP_DEV_PDN);
189 static int get_ssusb_rscs(struct platform_device *pdev, struct ssusb_mtk *ssusb)
191 struct device_node *node = pdev->dev.of_node;
192 struct otg_switch_mtk *otg_sx = &ssusb->otg_switch;
193 struct clk_bulk_data *clks = ssusb->clks;
194 struct device *dev = &pdev->dev;
198 ssusb->vusb33 = devm_regulator_get(dev, "vusb33");
199 if (IS_ERR(ssusb->vusb33)) {
200 dev_err(dev, "failed to get vusb33\n");
201 return PTR_ERR(ssusb->vusb33);
204 clks[0].id = "sys_ck";
205 clks[1].id = "ref_ck";
206 clks[2].id = "mcu_ck";
207 clks[3].id = "dma_ck";
208 ret = devm_clk_bulk_get_optional(dev, BULK_CLKS_CNT, clks);
212 ssusb->num_phys = of_count_phandle_with_args(node,
213 "phys", "#phy-cells");
214 if (ssusb->num_phys > 0) {
215 ssusb->phys = devm_kcalloc(dev, ssusb->num_phys,
216 sizeof(*ssusb->phys), GFP_KERNEL);
223 for (i = 0; i < ssusb->num_phys; i++) {
224 ssusb->phys[i] = devm_of_phy_get_by_index(dev, node, i);
225 if (IS_ERR(ssusb->phys[i])) {
226 dev_err(dev, "failed to get phy-%d\n", i);
227 return PTR_ERR(ssusb->phys[i]);
231 ssusb->ippc_base = devm_platform_ioremap_resource_byname(pdev, "ippc");
232 if (IS_ERR(ssusb->ippc_base))
233 return PTR_ERR(ssusb->ippc_base);
235 ssusb->wakeup_irq = platform_get_irq_byname_optional(pdev, "wakeup");
236 if (ssusb->wakeup_irq == -EPROBE_DEFER)
237 return ssusb->wakeup_irq;
239 ssusb->dr_mode = usb_get_dr_mode(dev);
240 if (ssusb->dr_mode == USB_DR_MODE_UNKNOWN)
241 ssusb->dr_mode = USB_DR_MODE_OTG;
243 if (ssusb->dr_mode == USB_DR_MODE_PERIPHERAL)
246 /* if host role is supported */
247 ret = ssusb_wakeup_of_property_parse(ssusb, node);
249 dev_err(dev, "failed to parse uwk property\n");
253 /* optional property, ignore the error if it does not exist */
254 of_property_read_u32(node, "mediatek,u3p-dis-msk",
255 &ssusb->u3p_dis_msk);
256 of_property_read_u32(node, "mediatek,u2p-dis-msk",
257 &ssusb->u2p_dis_msk);
259 otg_sx->vbus = devm_regulator_get(dev, "vbus");
260 if (IS_ERR(otg_sx->vbus)) {
261 dev_err(dev, "failed to get vbus\n");
262 return PTR_ERR(otg_sx->vbus);
265 if (ssusb->dr_mode == USB_DR_MODE_HOST)
268 /* if dual-role mode is supported */
269 otg_sx->is_u3_drd = of_property_read_bool(node, "mediatek,usb3-drd");
270 otg_sx->manual_drd_enabled =
271 of_property_read_bool(node, "enable-manual-drd");
272 otg_sx->role_sw_used = of_property_read_bool(node, "usb-role-switch");
274 /* can't disable port0 when use dual-role mode */
275 ssusb->u2p_dis_msk &= ~0x1;
277 if (otg_sx->role_sw_used || otg_sx->manual_drd_enabled)
280 if (of_property_read_bool(node, "extcon")) {
281 otg_sx->edev = extcon_get_edev_by_phandle(ssusb->dev, 0);
282 if (IS_ERR(otg_sx->edev)) {
283 return dev_err_probe(dev, PTR_ERR(otg_sx->edev),
284 "couldn't get extcon device\n");
289 dev_info(dev, "dr_mode: %d, is_u3_dr: %d, drd: %s\n",
290 ssusb->dr_mode, otg_sx->is_u3_drd,
291 otg_sx->manual_drd_enabled ? "manual" : "auto");
292 dev_info(dev, "u2p_dis_msk: %x, u3p_dis_msk: %x\n",
293 ssusb->u2p_dis_msk, ssusb->u3p_dis_msk);
298 static int mtu3_probe(struct platform_device *pdev)
300 struct device_node *node = pdev->dev.of_node;
301 struct device *dev = &pdev->dev;
302 struct ssusb_mtk *ssusb;
305 /* all elements are set to ZERO as default value */
306 ssusb = devm_kzalloc(dev, sizeof(*ssusb), GFP_KERNEL);
310 ret = dma_set_mask_and_coherent(dev, DMA_BIT_MASK(32));
312 dev_err(dev, "No suitable DMA config available\n");
316 platform_set_drvdata(pdev, ssusb);
319 ret = get_ssusb_rscs(pdev, ssusb);
323 ssusb_debugfs_create_root(ssusb);
325 /* enable power domain */
326 pm_runtime_set_active(dev);
327 pm_runtime_use_autosuspend(dev);
328 pm_runtime_set_autosuspend_delay(dev, 4000);
329 pm_runtime_enable(dev);
330 pm_runtime_get_sync(dev);
332 ret = ssusb_rscs_init(ssusb);
336 if (ssusb->wakeup_irq > 0) {
337 ret = dev_pm_set_dedicated_wake_irq(dev, ssusb->wakeup_irq);
339 dev_err(dev, "failed to set wakeup irq %d\n", ssusb->wakeup_irq);
342 dev_info(dev, "wakeup irq %d\n", ssusb->wakeup_irq);
345 ssusb_ip_sw_reset(ssusb);
347 if (IS_ENABLED(CONFIG_USB_MTU3_HOST))
348 ssusb->dr_mode = USB_DR_MODE_HOST;
349 else if (IS_ENABLED(CONFIG_USB_MTU3_GADGET))
350 ssusb->dr_mode = USB_DR_MODE_PERIPHERAL;
352 /* default as host */
353 ssusb->is_host = !(ssusb->dr_mode == USB_DR_MODE_PERIPHERAL);
355 switch (ssusb->dr_mode) {
356 case USB_DR_MODE_PERIPHERAL:
357 ret = ssusb_gadget_init(ssusb);
359 dev_err(dev, "failed to initialize gadget\n");
363 case USB_DR_MODE_HOST:
364 ret = ssusb_host_init(ssusb, node);
366 dev_err(dev, "failed to initialize host\n");
370 case USB_DR_MODE_OTG:
371 ret = ssusb_gadget_init(ssusb);
373 dev_err(dev, "failed to initialize gadget\n");
377 ret = ssusb_host_init(ssusb, node);
379 dev_err(dev, "failed to initialize host\n");
383 ret = ssusb_otg_switch_init(ssusb);
385 dev_err(dev, "failed to initialize switch\n");
390 dev_err(dev, "unsupported mode: %d\n", ssusb->dr_mode);
395 device_enable_async_suspend(dev);
396 pm_runtime_mark_last_busy(dev);
397 pm_runtime_put_autosuspend(dev);
398 pm_runtime_forbid(dev);
403 ssusb_host_exit(ssusb);
405 ssusb_gadget_exit(ssusb);
407 ssusb_rscs_exit(ssusb);
409 pm_runtime_put_noidle(dev);
410 pm_runtime_disable(dev);
411 ssusb_debugfs_remove_root(ssusb);
416 static int mtu3_remove(struct platform_device *pdev)
418 struct ssusb_mtk *ssusb = platform_get_drvdata(pdev);
420 pm_runtime_get_sync(&pdev->dev);
422 switch (ssusb->dr_mode) {
423 case USB_DR_MODE_PERIPHERAL:
424 ssusb_gadget_exit(ssusb);
426 case USB_DR_MODE_HOST:
427 ssusb_host_exit(ssusb);
429 case USB_DR_MODE_OTG:
430 ssusb_otg_switch_exit(ssusb);
431 ssusb_gadget_exit(ssusb);
432 ssusb_host_exit(ssusb);
438 ssusb_rscs_exit(ssusb);
439 ssusb_debugfs_remove_root(ssusb);
440 pm_runtime_disable(&pdev->dev);
441 pm_runtime_put_noidle(&pdev->dev);
442 pm_runtime_set_suspended(&pdev->dev);
447 static int resume_ip_and_ports(struct ssusb_mtk *ssusb, pm_message_t msg)
449 switch (ssusb->dr_mode) {
450 case USB_DR_MODE_PERIPHERAL:
451 ssusb_gadget_resume(ssusb, msg);
453 case USB_DR_MODE_HOST:
454 ssusb_host_resume(ssusb, false);
456 case USB_DR_MODE_OTG:
457 ssusb_host_resume(ssusb, !ssusb->is_host);
459 ssusb_gadget_resume(ssusb, msg);
469 static int mtu3_suspend_common(struct device *dev, pm_message_t msg)
471 struct ssusb_mtk *ssusb = dev_get_drvdata(dev);
474 dev_dbg(dev, "%s\n", __func__);
476 switch (ssusb->dr_mode) {
477 case USB_DR_MODE_PERIPHERAL:
478 ret = ssusb_gadget_suspend(ssusb, msg);
483 case USB_DR_MODE_HOST:
484 ssusb_host_suspend(ssusb);
486 case USB_DR_MODE_OTG:
487 if (!ssusb->is_host) {
488 ret = ssusb_gadget_suspend(ssusb, msg);
492 ssusb_host_suspend(ssusb);
498 ret = wait_for_ip_sleep(ssusb);
502 ssusb_phy_power_off(ssusb);
503 clk_bulk_disable_unprepare(BULK_CLKS_CNT, ssusb->clks);
504 ssusb_wakeup_set(ssusb, true);
508 resume_ip_and_ports(ssusb, msg);
513 static int mtu3_resume_common(struct device *dev, pm_message_t msg)
515 struct ssusb_mtk *ssusb = dev_get_drvdata(dev);
518 dev_dbg(dev, "%s\n", __func__);
520 ssusb_wakeup_set(ssusb, false);
521 ret = clk_bulk_prepare_enable(BULK_CLKS_CNT, ssusb->clks);
525 ret = ssusb_phy_power_on(ssusb);
529 return resume_ip_and_ports(ssusb, msg);
532 clk_bulk_disable_unprepare(BULK_CLKS_CNT, ssusb->clks);
537 static int __maybe_unused mtu3_suspend(struct device *dev)
539 return mtu3_suspend_common(dev, PMSG_SUSPEND);
542 static int __maybe_unused mtu3_resume(struct device *dev)
544 return mtu3_resume_common(dev, PMSG_SUSPEND);
547 static int __maybe_unused mtu3_runtime_suspend(struct device *dev)
549 if (!device_may_wakeup(dev))
552 return mtu3_suspend_common(dev, PMSG_AUTO_SUSPEND);
555 static int __maybe_unused mtu3_runtime_resume(struct device *dev)
557 if (!device_may_wakeup(dev))
560 return mtu3_resume_common(dev, PMSG_AUTO_SUSPEND);
563 static const struct dev_pm_ops mtu3_pm_ops = {
564 SET_SYSTEM_SLEEP_PM_OPS(mtu3_suspend, mtu3_resume)
565 SET_RUNTIME_PM_OPS(mtu3_runtime_suspend,
566 mtu3_runtime_resume, NULL)
569 #define DEV_PM_OPS (IS_ENABLED(CONFIG_PM) ? &mtu3_pm_ops : NULL)
571 static const struct of_device_id mtu3_of_match[] = {
572 {.compatible = "mediatek,mt8173-mtu3",},
573 {.compatible = "mediatek,mtu3",},
576 MODULE_DEVICE_TABLE(of, mtu3_of_match);
578 static struct platform_driver mtu3_driver = {
580 .remove = mtu3_remove,
582 .name = MTU3_DRIVER_NAME,
584 .of_match_table = mtu3_of_match,
587 module_platform_driver(mtu3_driver);
589 MODULE_AUTHOR("Chunfeng Yun <chunfeng.yun@mediatek.com>");
590 MODULE_LICENSE("GPL v2");
591 MODULE_DESCRIPTION("MediaTek USB3 DRD Controller Driver");