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Greg Kroah-Hartman5fd54ac2017-11-03 11:28:30 +01001// SPDX-License-Identifier: GPL-2.0+
Randy Vinson80cb9ae2006-01-20 13:53:38 -08002/*
Anton Vorontsov1af10772009-12-14 18:41:12 +03003 * Copyright 2005-2009 MontaVista Software, Inc.
Ramneek Mehreshca07e1c2015-05-14 19:04:46 +05304 * Copyright 2008,2012,2015 Freescale Semiconductor, Inc.
Randy Vinson80cb9ae2006-01-20 13:53:38 -08005 *
Randy Vinson80cb9ae2006-01-20 13:53:38 -08006 * Ported to 834x by Randy Vinson <rvinson@mvista.com> using code provided
7 * by Hunter Wu.
Anton Vorontsov1af10772009-12-14 18:41:12 +03008 * Power Management support by Dave Liu <daveliu@freescale.com>,
9 * Jerry Huang <Chang-Ming.Huang@freescale.com> and
10 * Anton Vorontsov <avorontsov@ru.mvista.com>.
Randy Vinson80cb9ae2006-01-20 13:53:38 -080011 */
12
Anton Vorontsov1af10772009-12-14 18:41:12 +030013#include <linux/kernel.h>
Ramneek Mehreshca07e1c2015-05-14 19:04:46 +053014#include <linux/module.h>
Anton Vorontsov1af10772009-12-14 18:41:12 +030015#include <linux/types.h>
16#include <linux/delay.h>
17#include <linux/pm.h>
Kishon Vijay Abraham Ided017e2012-06-26 17:40:32 +053018#include <linux/err.h>
Ramneek Mehreshca07e1c2015-05-14 19:04:46 +053019#include <linux/usb.h>
20#include <linux/usb/ehci_def.h>
21#include <linux/usb/hcd.h>
22#include <linux/usb/otg.h>
Randy Vinson80cb9ae2006-01-20 13:53:38 -080023#include <linux/platform_device.h>
24#include <linux/fsl_devices.h>
Sriram Dash6f5429d2015-12-18 14:16:29 +053025#include <linux/of_platform.h>
Ran Wang972a34e2019-01-17 09:10:50 +000026#include <linux/io.h>
Randy Vinson80cb9ae2006-01-20 13:53:38 -080027
Ramneek Mehreshca07e1c2015-05-14 19:04:46 +053028#include "ehci.h"
Randy Vinson80cb9ae2006-01-20 13:53:38 -080029#include "ehci-fsl.h"
30
Ramneek Mehreshca07e1c2015-05-14 19:04:46 +053031#define DRIVER_DESC "Freescale EHCI Host controller driver"
Alexander Stein5d3d01a2023-01-20 13:27:14 +010032#define DRV_NAME "fsl-ehci"
Ramneek Mehreshca07e1c2015-05-14 19:04:46 +053033
34static struct hc_driver __read_mostly fsl_ehci_hc_driver;
35
Randy Vinson80cb9ae2006-01-20 13:53:38 -080036/* configure so an HC device and id are always provided */
37/* always called with process context; sleeping is OK */
38
Ramneek Mehreshca07e1c2015-05-14 19:04:46 +053039/*
40 * fsl_ehci_drv_probe - initialize FSL-based HCDs
Randy Vinson80cb9ae2006-01-20 13:53:38 -080041 * @pdev: USB Host Controller being probed
Ahmed S. Darwish19220ba2020-10-19 12:06:37 +020042 *
43 * Context: task context, might sleep
Randy Vinson80cb9ae2006-01-20 13:53:38 -080044 *
45 * Allocates basic resources for this USB host controller.
Randy Vinson80cb9ae2006-01-20 13:53:38 -080046 */
Ramneek Mehreshca07e1c2015-05-14 19:04:46 +053047static int fsl_ehci_drv_probe(struct platform_device *pdev)
Randy Vinson80cb9ae2006-01-20 13:53:38 -080048{
49 struct fsl_usb2_platform_data *pdata;
50 struct usb_hcd *hcd;
51 struct resource *res;
52 int irq;
53 int retval;
Ran Wang972a34e2019-01-17 09:10:50 +000054 u32 tmp;
Randy Vinson80cb9ae2006-01-20 13:53:38 -080055
56 pr_debug("initializing FSL-SOC USB Controller\n");
57
58 /* Need platform data for setup */
Jingoo Han37c3a3c2013-09-09 14:04:44 +090059 pdata = dev_get_platdata(&pdev->dev);
Randy Vinson80cb9ae2006-01-20 13:53:38 -080060 if (!pdata) {
61 dev_err(&pdev->dev,
Kay Sievers7071a3c2008-05-02 06:02:41 +020062 "No platform data for %s.\n", dev_name(&pdev->dev));
Randy Vinson80cb9ae2006-01-20 13:53:38 -080063 return -ENODEV;
64 }
65
66 /*
67 * This is a host mode driver, verify that we're supposed to be
68 * in host mode.
69 */
70 if (!((pdata->operating_mode == FSL_USB2_DR_HOST) ||
Li Yangba029782007-05-11 17:09:55 +080071 (pdata->operating_mode == FSL_USB2_MPH_HOST) ||
72 (pdata->operating_mode == FSL_USB2_DR_OTG))) {
Randy Vinson80cb9ae2006-01-20 13:53:38 -080073 dev_err(&pdev->dev,
74 "Non Host Mode configured for %s. Wrong driver linked.\n",
Kay Sievers7071a3c2008-05-02 06:02:41 +020075 dev_name(&pdev->dev));
Randy Vinson80cb9ae2006-01-20 13:53:38 -080076 return -ENODEV;
77 }
78
Darren Stevensbb160ee2022-07-02 22:03:55 +010079 irq = platform_get_irq(pdev, 0);
80 if (irq < 0)
81 return irq;
Randy Vinson80cb9ae2006-01-20 13:53:38 -080082
Arnd Bergmann8123e492017-03-13 10:18:43 +080083 hcd = __usb_create_hcd(&fsl_ehci_hc_driver, pdev->dev.parent,
84 &pdev->dev, dev_name(&pdev->dev), NULL);
Randy Vinson80cb9ae2006-01-20 13:53:38 -080085 if (!hcd) {
86 retval = -ENOMEM;
87 goto err1;
88 }
89
90 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
Jingoo Han7667fe62013-12-11 16:18:53 +090091 hcd->regs = devm_ioremap_resource(&pdev->dev, res);
92 if (IS_ERR(hcd->regs)) {
93 retval = PTR_ERR(hcd->regs);
Randy Vinson80cb9ae2006-01-20 13:53:38 -080094 goto err2;
95 }
Randy Vinson80cb9ae2006-01-20 13:53:38 -080096
Varka Bhadramce98f542014-11-04 07:51:32 +053097 hcd->rsrc_start = res->start;
98 hcd->rsrc_len = resource_size(res);
99
Anatolij Gustschin230f7ed2010-09-28 20:55:21 +0200100 pdata->regs = hcd->regs;
Randy Vinson80cb9ae2006-01-20 13:53:38 -0800101
Anatolij Gustschin83722bc2011-04-18 22:02:00 +0200102 if (pdata->power_budget)
103 hcd->power_budget = pdata->power_budget;
104
Anatolij Gustschin230f7ed2010-09-28 20:55:21 +0200105 /*
106 * do platform specific init: check the clock, grab/config pins, etc.
107 */
108 if (pdata->init && pdata->init(pdev)) {
109 retval = -ENODEV;
Jingoo Han7667fe62013-12-11 16:18:53 +0900110 goto err2;
Anatolij Gustschin230f7ed2010-09-28 20:55:21 +0200111 }
112
Anatolij Gustschin230f7ed2010-09-28 20:55:21 +0200113 /* Enable USB controller, 83xx or 8536 */
Ran Wang972a34e2019-01-17 09:10:50 +0000114 if (pdata->have_sysif_regs && pdata->controller_ver < FSL_USB_VER_1_6) {
115 tmp = ioread32be(hcd->regs + FSL_SOC_USB_CTRL);
116 tmp &= ~CONTROL_REGISTER_W1C_MASK;
117 tmp |= 0x4;
118 iowrite32be(tmp, hcd->regs + FSL_SOC_USB_CTRL);
119 }
Nikhil Badola4f182832019-06-24 15:22:15 +0800120
121 /* Set USB_EN bit to select ULPI phy for USB controller version 2.5 */
122 if (pdata->controller_ver == FSL_USB_VER_2_5 &&
123 pdata->phy_mode == FSL_USB2_PHY_ULPI)
124 iowrite32be(USB_CTRL_USB_EN, hcd->regs + FSL_SOC_USB_CTRL);
125
Nikhil Badola523f1de2015-06-15 15:47:29 +0530126 /*
127 * Enable UTMI phy and program PTS field in UTMI mode before asserting
128 * controller reset for USB Controller version 2.5
129 */
130 if (pdata->has_fsl_erratum_a007792) {
Ran Wang972a34e2019-01-17 09:10:50 +0000131 tmp = ioread32be(hcd->regs + FSL_SOC_USB_CTRL);
132 tmp &= ~CONTROL_REGISTER_W1C_MASK;
133 tmp |= CTRL_UTMI_PHY_EN;
134 iowrite32be(tmp, hcd->regs + FSL_SOC_USB_CTRL);
135
Nikhil Badola523f1de2015-06-15 15:47:29 +0530136 writel(PORT_PTS_UTMI, hcd->regs + FSL_SOC_USB_PORTSC1);
137 }
138
Anatolij Gustschin230f7ed2010-09-28 20:55:21 +0200139 /* Don't need to set host mode here. It will be done by tdi_reset() */
Randy Vinson80cb9ae2006-01-20 13:53:38 -0800140
Yong Zhangb5dd18d2011-09-07 16:10:52 +0800141 retval = usb_add_hcd(hcd, irq, IRQF_SHARED);
Randy Vinson80cb9ae2006-01-20 13:53:38 -0800142 if (retval != 0)
Jingoo Han7667fe62013-12-11 16:18:53 +0900143 goto err2;
Peter Chen3c9740a2013-11-05 10:46:02 +0800144 device_wakeup_enable(hcd->self.controller);
Anatolij Gustschin83722bc2011-04-18 22:02:00 +0200145
146#ifdef CONFIG_USB_OTG
147 if (pdata->operating_mode == FSL_USB2_DR_OTG) {
148 struct ehci_hcd *ehci = hcd_to_ehci(hcd);
149
Antoine Tenart3d46e732014-09-24 23:05:50 +0400150 hcd->usb_phy = usb_get_phy(USB_PHY_TYPE_USB2);
Richard Zhaoc2e935a2012-06-13 20:34:12 +0800151 dev_dbg(&pdev->dev, "hcd=0x%p ehci=0x%p, phy=0x%p\n",
Antoine Tenart3d46e732014-09-24 23:05:50 +0400152 hcd, ehci, hcd->usb_phy);
Anatolij Gustschin83722bc2011-04-18 22:02:00 +0200153
Antoine Tenart3d46e732014-09-24 23:05:50 +0400154 if (!IS_ERR_OR_NULL(hcd->usb_phy)) {
155 retval = otg_set_host(hcd->usb_phy->otg,
Anatolij Gustschin83722bc2011-04-18 22:02:00 +0200156 &ehci_to_hcd(ehci)->self);
157 if (retval) {
Antoine Tenart3d46e732014-09-24 23:05:50 +0400158 usb_put_phy(hcd->usb_phy);
Jingoo Han7667fe62013-12-11 16:18:53 +0900159 goto err2;
Anatolij Gustschin83722bc2011-04-18 22:02:00 +0200160 }
161 } else {
Richard Zhaoc2e935a2012-06-13 20:34:12 +0800162 dev_err(&pdev->dev, "can't find phy\n");
Anatolij Gustschin83722bc2011-04-18 22:02:00 +0200163 retval = -ENODEV;
Jingoo Han7667fe62013-12-11 16:18:53 +0900164 goto err2;
Anatolij Gustschin83722bc2011-04-18 22:02:00 +0200165 }
Martin Blumenstingl4e88d4c2018-03-03 22:43:03 +0100166
167 hcd->skip_phy_initialization = 1;
Anatolij Gustschin83722bc2011-04-18 22:02:00 +0200168 }
169#endif
Randy Vinson80cb9ae2006-01-20 13:53:38 -0800170 return retval;
171
Randy Vinson80cb9ae2006-01-20 13:53:38 -0800172 err2:
173 usb_put_hcd(hcd);
174 err1:
Kay Sievers7071a3c2008-05-02 06:02:41 +0200175 dev_err(&pdev->dev, "init %s fail, %d\n", dev_name(&pdev->dev), retval);
Anatolij Gustschin230f7ed2010-09-28 20:55:21 +0200176 if (pdata->exit)
177 pdata->exit(pdev);
Randy Vinson80cb9ae2006-01-20 13:53:38 -0800178 return retval;
179}
180
Suresh Gupta5dfff992019-06-24 15:22:16 +0800181static bool usb_phy_clk_valid(struct usb_hcd *hcd)
182{
183 void __iomem *non_ehci = hcd->regs;
184 bool ret = true;
185
186 if (!(ioread32be(non_ehci + FSL_SOC_USB_CTRL) & PHY_CLK_VALID))
187 ret = false;
188
189 return ret;
190}
191
Shengzhou Liu3735ba82012-08-22 18:17:00 +0800192static int ehci_fsl_setup_phy(struct usb_hcd *hcd,
Anatolij Gustschin230f7ed2010-09-28 20:55:21 +0200193 enum fsl_usb2_phy_modes phy_mode,
194 unsigned int port_offset)
Randy Vinson80cb9ae2006-01-20 13:53:38 -0800195{
Ran Wang972a34e2019-01-17 09:10:50 +0000196 u32 portsc, tmp;
Ramneek Mehresh58c559e2012-03-20 10:35:50 +0530197 struct ehci_hcd *ehci = hcd_to_ehci(hcd);
Shengzhou Liu28c56ea2012-02-16 18:02:20 +0800198 void __iomem *non_ehci = hcd->regs;
Ramneek Mehresh58c559e2012-03-20 10:35:50 +0530199 struct device *dev = hcd->self.controller;
Jingoo Hand4f09e22013-07-30 19:59:40 +0900200 struct fsl_usb2_platform_data *pdata = dev_get_platdata(dev);
Anatolij Gustschinf941f692012-04-10 10:48:11 +0200201
Ramneek Mehresh58c559e2012-03-20 10:35:50 +0530202 if (pdata->controller_ver < 0) {
203 dev_warn(hcd->self.controller, "Could not get controller version\n");
Ben Collinsd479c912012-10-19 10:24:12 -0400204 return -ENODEV;
Ramneek Mehresh58c559e2012-03-20 10:35:50 +0530205 }
Anatolij Gustschin230f7ed2010-09-28 20:55:21 +0200206
207 portsc = ehci_readl(ehci, &ehci->regs->port_status[port_offset]);
208 portsc &= ~(PORT_PTS_MSK | PORT_PTS_PTW);
209
Randy Vinson80cb9ae2006-01-20 13:53:38 -0800210 switch (phy_mode) {
211 case FSL_USB2_PHY_ULPI:
Anatolij Gustschinf66dea72012-12-04 14:24:30 +0100212 if (pdata->have_sysif_regs && pdata->controller_ver) {
Ramneek Mehresh58c559e2012-03-20 10:35:50 +0530213 /* controller version 1.6 or above */
Ran Wang972a34e2019-01-17 09:10:50 +0000214 /* turn off UTMI PHY first */
215 tmp = ioread32be(non_ehci + FSL_SOC_USB_CTRL);
216 tmp &= ~(CONTROL_REGISTER_W1C_MASK | UTMI_PHY_EN);
217 iowrite32be(tmp, non_ehci + FSL_SOC_USB_CTRL);
218
219 /* then turn on ULPI and enable USB controller */
220 tmp = ioread32be(non_ehci + FSL_SOC_USB_CTRL);
221 tmp &= ~CONTROL_REGISTER_W1C_MASK;
222 tmp |= ULPI_PHY_CLK_SEL | USB_CTRL_USB_EN;
223 iowrite32be(tmp, non_ehci + FSL_SOC_USB_CTRL);
Ramneek Mehresh58c559e2012-03-20 10:35:50 +0530224 }
Randy Vinson80cb9ae2006-01-20 13:53:38 -0800225 portsc |= PORT_PTS_ULPI;
226 break;
227 case FSL_USB2_PHY_SERIAL:
228 portsc |= PORT_PTS_SERIAL;
229 break;
230 case FSL_USB2_PHY_UTMI_WIDE:
231 portsc |= PORT_PTS_PTW;
Gustavo A. R. Silva8b847242020-07-07 14:50:23 -0500232 fallthrough;
Randy Vinson80cb9ae2006-01-20 13:53:38 -0800233 case FSL_USB2_PHY_UTMI:
Ramneek Mehreshc1f9d2e2019-06-24 15:22:18 +0800234 /* Presence of this node "has_fsl_erratum_a006918"
235 * in device-tree is used to stop USB controller
236 * initialization in Linux
237 */
238 if (pdata->has_fsl_erratum_a006918) {
239 dev_warn(dev, "USB PHY clock invalid\n");
240 return -EINVAL;
241 }
Gustavo A. R. Silva8b847242020-07-07 14:50:23 -0500242 fallthrough;
Nikhil Badola6009d952015-06-15 15:48:22 +0530243 case FSL_USB2_PHY_UTMI_DUAL:
Suresh Gupta5dfff992019-06-24 15:22:16 +0800244 /* PHY_CLK_VALID bit is de-featured from all controller
245 * versions below 2.4 and is to be checked only for
246 * internal UTMI phy
247 */
248 if (pdata->controller_ver > FSL_USB_VER_2_4 &&
249 pdata->have_sysif_regs && !usb_phy_clk_valid(hcd)) {
250 dev_err(dev, "USB PHY clock invalid\n");
251 return -EINVAL;
252 }
253
Anatolij Gustschinf66dea72012-12-04 14:24:30 +0100254 if (pdata->have_sysif_regs && pdata->controller_ver) {
Ramneek Mehresh58c559e2012-03-20 10:35:50 +0530255 /* controller version 1.6 or above */
Ran Wang972a34e2019-01-17 09:10:50 +0000256 tmp = ioread32be(non_ehci + FSL_SOC_USB_CTRL);
257 tmp &= ~CONTROL_REGISTER_W1C_MASK;
258 tmp |= UTMI_PHY_EN;
259 iowrite32be(tmp, non_ehci + FSL_SOC_USB_CTRL);
260
Ramneek Mehresh58c559e2012-03-20 10:35:50 +0530261 mdelay(FSL_UTMI_PHY_DLY); /* Delay for UTMI PHY CLK to
262 become stable - 10ms*/
263 }
Shengzhou Liu28c56ea2012-02-16 18:02:20 +0800264 /* enable UTMI PHY */
Ran Wang972a34e2019-01-17 09:10:50 +0000265 if (pdata->have_sysif_regs) {
266 tmp = ioread32be(non_ehci + FSL_SOC_USB_CTRL);
267 tmp &= ~CONTROL_REGISTER_W1C_MASK;
268 tmp |= CTRL_UTMI_PHY_EN;
269 iowrite32be(tmp, non_ehci + FSL_SOC_USB_CTRL);
270 }
Randy Vinson80cb9ae2006-01-20 13:53:38 -0800271 portsc |= PORT_PTS_UTMI;
272 break;
273 case FSL_USB2_PHY_NONE:
274 break;
275 }
Shengzhou Liu3735ba82012-08-22 18:17:00 +0800276
Suresh Gupta5dfff992019-06-24 15:22:16 +0800277 if (pdata->have_sysif_regs &&
278 pdata->controller_ver > FSL_USB_VER_1_6 &&
279 !usb_phy_clk_valid(hcd)) {
280 dev_warn(hcd->self.controller, "USB PHY clock invalid\n");
281 return -EINVAL;
Shengzhou Liu3735ba82012-08-22 18:17:00 +0800282 }
283
Benjamin Herrenschmidt083522d2006-12-15 06:54:08 +1100284 ehci_writel(ehci, portsc, &ehci->regs->port_status[port_offset]);
Shengzhou Liu3735ba82012-08-22 18:17:00 +0800285
Ran Wang972a34e2019-01-17 09:10:50 +0000286 if (phy_mode != FSL_USB2_PHY_ULPI && pdata->have_sysif_regs) {
287 tmp = ioread32be(non_ehci + FSL_SOC_USB_CTRL);
288 tmp &= ~CONTROL_REGISTER_W1C_MASK;
289 tmp |= USB_CTRL_USB_EN;
290 iowrite32be(tmp, non_ehci + FSL_SOC_USB_CTRL);
291 }
Shengzhou Liu3735ba82012-08-22 18:17:00 +0800292
293 return 0;
Randy Vinson80cb9ae2006-01-20 13:53:38 -0800294}
295
Shengzhou Liu3735ba82012-08-22 18:17:00 +0800296static int ehci_fsl_usb_setup(struct ehci_hcd *ehci)
Randy Vinson80cb9ae2006-01-20 13:53:38 -0800297{
Anatolij Gustschin230f7ed2010-09-28 20:55:21 +0200298 struct usb_hcd *hcd = ehci_to_hcd(ehci);
Randy Vinson80cb9ae2006-01-20 13:53:38 -0800299 struct fsl_usb2_platform_data *pdata;
300 void __iomem *non_ehci = hcd->regs;
301
Jingoo Hand4f09e22013-07-30 19:59:40 +0900302 pdata = dev_get_platdata(hcd->self.controller);
Anatolij Gustschin230f7ed2010-09-28 20:55:21 +0200303
Anatolij Gustschin230f7ed2010-09-28 20:55:21 +0200304 if (pdata->have_sysif_regs) {
Pan Jiafei4c954322012-02-17 13:57:16 +0800305 /*
306 * Turn on cache snooping hardware, since some PowerPC platforms
307 * wholly rely on hardware to deal with cache coherent
308 */
309
310 /* Setup Snooping for all the 4GB space */
311 /* SNOOP1 starts from 0x0, size 2G */
Sriram Dash6f5429d2015-12-18 14:16:29 +0530312 iowrite32be(0x0 | SNOOP_SIZE_2GB,
313 non_ehci + FSL_SOC_USB_SNOOP1);
Pan Jiafei4c954322012-02-17 13:57:16 +0800314 /* SNOOP2 starts from 0x80000000, size 2G */
Sriram Dash6f5429d2015-12-18 14:16:29 +0530315 iowrite32be(0x80000000 | SNOOP_SIZE_2GB,
316 non_ehci + FSL_SOC_USB_SNOOP2);
Anatolij Gustschin230f7ed2010-09-28 20:55:21 +0200317 }
Randy Vinson80cb9ae2006-01-20 13:53:38 -0800318
Nikhil Badolaf8786a92015-08-06 14:51:27 +0530319 /* Deal with USB erratum A-005275 */
320 if (pdata->has_fsl_erratum_a005275 == 1)
321 ehci->has_fsl_hs_errata = 1;
322
Changming Huang9d4b8272016-11-29 13:45:38 +0800323 if (pdata->has_fsl_erratum_a005697 == 1)
324 ehci->has_fsl_susp_errata = 1;
325
Li Yangba029782007-05-11 17:09:55 +0800326 if ((pdata->operating_mode == FSL_USB2_DR_HOST) ||
327 (pdata->operating_mode == FSL_USB2_DR_OTG))
Shengzhou Liu3735ba82012-08-22 18:17:00 +0800328 if (ehci_fsl_setup_phy(hcd, pdata->phy_mode, 0))
329 return -EINVAL;
Randy Vinson80cb9ae2006-01-20 13:53:38 -0800330
331 if (pdata->operating_mode == FSL_USB2_MPH_HOST) {
Kumar Gala8cd42e92006-01-20 13:57:52 -0800332
333 /* Deal with USB Erratum #14 on MPC834x Rev 1.0 & 1.1 chips */
Ran Wang5f620bb2019-01-17 09:10:55 +0000334 if (pdata->has_fsl_erratum_14 == 1)
Kumar Gala8cd42e92006-01-20 13:57:52 -0800335 ehci->has_fsl_port_bug = 1;
336
Randy Vinson80cb9ae2006-01-20 13:53:38 -0800337 if (pdata->port_enables & FSL_USB2_PORT0_ENABLED)
Shengzhou Liu3735ba82012-08-22 18:17:00 +0800338 if (ehci_fsl_setup_phy(hcd, pdata->phy_mode, 0))
339 return -EINVAL;
340
Randy Vinson80cb9ae2006-01-20 13:53:38 -0800341 if (pdata->port_enables & FSL_USB2_PORT1_ENABLED)
Shengzhou Liu3735ba82012-08-22 18:17:00 +0800342 if (ehci_fsl_setup_phy(hcd, pdata->phy_mode, 1))
343 return -EINVAL;
Randy Vinson80cb9ae2006-01-20 13:53:38 -0800344 }
345
Anatolij Gustschin230f7ed2010-09-28 20:55:21 +0200346 if (pdata->have_sysif_regs) {
Kumar Gala08d76602012-07-10 06:58:48 -0500347#ifdef CONFIG_FSL_SOC_BOOKE
Sriram Dash6f5429d2015-12-18 14:16:29 +0530348 iowrite32be(0x00000008, non_ehci + FSL_SOC_USB_PRICTRL);
349 iowrite32be(0x00000080, non_ehci + FSL_SOC_USB_AGECNTTHRSH);
Srikanth Srinivasan4f534252008-07-02 02:14:33 -0500350#else
Sriram Dash6f5429d2015-12-18 14:16:29 +0530351 iowrite32be(0x0000000c, non_ehci + FSL_SOC_USB_PRICTRL);
352 iowrite32be(0x00000040, non_ehci + FSL_SOC_USB_AGECNTTHRSH);
Srikanth Srinivasan4f534252008-07-02 02:14:33 -0500353#endif
Sriram Dash6f5429d2015-12-18 14:16:29 +0530354 iowrite32be(0x00000001, non_ehci + FSL_SOC_USB_SICTRL);
Anatolij Gustschin230f7ed2010-09-28 20:55:21 +0200355 }
Shengzhou Liu3735ba82012-08-22 18:17:00 +0800356
357 return 0;
Randy Vinson80cb9ae2006-01-20 13:53:38 -0800358}
359
360/* called after powerup, by probe or system-pm "wakeup" */
361static int ehci_fsl_reinit(struct ehci_hcd *ehci)
362{
Shengzhou Liu3735ba82012-08-22 18:17:00 +0800363 if (ehci_fsl_usb_setup(ehci))
364 return -EINVAL;
Randy Vinson80cb9ae2006-01-20 13:53:38 -0800365
366 return 0;
367}
368
369/* called during probe() after chip reset completes */
370static int ehci_fsl_setup(struct usb_hcd *hcd)
371{
372 struct ehci_hcd *ehci = hcd_to_ehci(hcd);
373 int retval;
Anatolij Gustschin230f7ed2010-09-28 20:55:21 +0200374 struct fsl_usb2_platform_data *pdata;
Anatolij Gustschin761bbcb2012-01-24 22:17:38 +0100375 struct device *dev;
Anatolij Gustschin230f7ed2010-09-28 20:55:21 +0200376
Anatolij Gustschin761bbcb2012-01-24 22:17:38 +0100377 dev = hcd->self.controller;
Jingoo Hand4f09e22013-07-30 19:59:40 +0900378 pdata = dev_get_platdata(hcd->self.controller);
Anatolij Gustschin230f7ed2010-09-28 20:55:21 +0200379 ehci->big_endian_desc = pdata->big_endian_desc;
380 ehci->big_endian_mmio = pdata->big_endian_mmio;
Randy Vinson80cb9ae2006-01-20 13:53:38 -0800381
382 /* EHCI registers start at offset 0x100 */
383 ehci->caps = hcd->regs + 0x100;
Randy Vinson80cb9ae2006-01-20 13:53:38 -0800384
Gopalakrishnan Santhanam00577582021-05-13 14:02:25 +0530385#if defined(CONFIG_PPC_83xx) || defined(CONFIG_PPC_85xx)
Christian Engelmayere6604a72013-04-03 12:18:51 +0200386 /*
Gopalakrishnan Santhanam00577582021-05-13 14:02:25 +0530387 * Deal with MPC834X/85XX that need port power to be cycled
388 * after the power fault condition is removed. Otherwise the
389 * state machine does not reflect PORTSC[CSC] correctly.
Christian Engelmayere6604a72013-04-03 12:18:51 +0200390 */
391 ehci->need_oc_pp_cycle = 1;
392#endif
393
Matthieu CASTET65fd4272010-09-06 18:26:56 +0200394 hcd->has_tt = 1;
395
Alan Stern1a49e2a2012-07-09 15:55:14 -0400396 retval = ehci_setup(hcd);
Randy Vinson80cb9ae2006-01-20 13:53:38 -0800397 if (retval)
398 return retval;
399
Anatolij Gustschin761bbcb2012-01-24 22:17:38 +0100400 if (of_device_is_compatible(dev->parent->of_node,
401 "fsl,mpc5121-usb2-dr")) {
402 /*
403 * set SBUSCFG:AHBBRST so that control msgs don't
404 * fail when doing heavy PATA writes.
405 */
406 ehci_writel(ehci, SBUSCFG_INCR8,
407 hcd->regs + FSL_SOC_USB_SBUSCFG);
408 }
409
Randy Vinson80cb9ae2006-01-20 13:53:38 -0800410 retval = ehci_fsl_reinit(ehci);
411 return retval;
412}
413
Anton Vorontsov1af10772009-12-14 18:41:12 +0300414struct ehci_fsl {
415 struct ehci_hcd ehci;
416
417#ifdef CONFIG_PM
418 /* Saved USB PHY settings, need to restore after deep sleep. */
419 u32 usb_ctrl;
420#endif
421};
422
423#ifdef CONFIG_PM
424
Anatolij Gustschin13b7ee2a2011-04-18 22:01:55 +0200425#ifdef CONFIG_PPC_MPC512x
426static int ehci_fsl_mpc512x_drv_suspend(struct device *dev)
427{
428 struct usb_hcd *hcd = dev_get_drvdata(dev);
429 struct ehci_hcd *ehci = hcd_to_ehci(hcd);
Jingoo Hand4f09e22013-07-30 19:59:40 +0900430 struct fsl_usb2_platform_data *pdata = dev_get_platdata(dev);
Anatolij Gustschin13b7ee2a2011-04-18 22:01:55 +0200431 u32 tmp;
432
Oliver Neukum1c201632013-11-18 13:23:16 +0100433#ifdef CONFIG_DYNAMIC_DEBUG
Anatolij Gustschin13b7ee2a2011-04-18 22:01:55 +0200434 u32 mode = ehci_readl(ehci, hcd->regs + FSL_SOC_USB_USBMODE);
435 mode &= USBMODE_CM_MASK;
436 tmp = ehci_readl(ehci, hcd->regs + 0x140); /* usbcmd */
437
438 dev_dbg(dev, "suspend=%d already_suspended=%d "
439 "mode=%d usbcmd %08x\n", pdata->suspended,
440 pdata->already_suspended, mode, tmp);
441#endif
442
443 /*
444 * If the controller is already suspended, then this must be a
445 * PM suspend. Remember this fact, so that we will leave the
446 * controller suspended at PM resume time.
447 */
448 if (pdata->suspended) {
449 dev_dbg(dev, "already suspended, leaving early\n");
450 pdata->already_suspended = 1;
451 return 0;
452 }
453
454 dev_dbg(dev, "suspending...\n");
455
Alan Sterne8799902011-08-18 16:31:30 -0400456 ehci->rh_state = EHCI_RH_SUSPENDED;
Anatolij Gustschin13b7ee2a2011-04-18 22:01:55 +0200457 dev->power.power_state = PMSG_SUSPEND;
458
459 /* ignore non-host interrupts */
460 clear_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags);
461
462 /* stop the controller */
463 tmp = ehci_readl(ehci, &ehci->regs->command);
464 tmp &= ~CMD_RUN;
465 ehci_writel(ehci, tmp, &ehci->regs->command);
466
467 /* save EHCI registers */
468 pdata->pm_command = ehci_readl(ehci, &ehci->regs->command);
469 pdata->pm_command &= ~CMD_RUN;
470 pdata->pm_status = ehci_readl(ehci, &ehci->regs->status);
471 pdata->pm_intr_enable = ehci_readl(ehci, &ehci->regs->intr_enable);
472 pdata->pm_frame_index = ehci_readl(ehci, &ehci->regs->frame_index);
473 pdata->pm_segment = ehci_readl(ehci, &ehci->regs->segment);
474 pdata->pm_frame_list = ehci_readl(ehci, &ehci->regs->frame_list);
475 pdata->pm_async_next = ehci_readl(ehci, &ehci->regs->async_next);
476 pdata->pm_configured_flag =
477 ehci_readl(ehci, &ehci->regs->configured_flag);
478 pdata->pm_portsc = ehci_readl(ehci, &ehci->regs->port_status[0]);
479 pdata->pm_usbgenctrl = ehci_readl(ehci,
480 hcd->regs + FSL_SOC_USB_USBGENCTRL);
481
482 /* clear the W1C bits */
483 pdata->pm_portsc &= cpu_to_hc32(ehci, ~PORT_RWC_BITS);
484
485 pdata->suspended = 1;
486
487 /* clear PP to cut power to the port */
488 tmp = ehci_readl(ehci, &ehci->regs->port_status[0]);
489 tmp &= ~PORT_POWER;
490 ehci_writel(ehci, tmp, &ehci->regs->port_status[0]);
491
492 return 0;
493}
494
495static int ehci_fsl_mpc512x_drv_resume(struct device *dev)
496{
497 struct usb_hcd *hcd = dev_get_drvdata(dev);
498 struct ehci_hcd *ehci = hcd_to_ehci(hcd);
Jingoo Hand4f09e22013-07-30 19:59:40 +0900499 struct fsl_usb2_platform_data *pdata = dev_get_platdata(dev);
Anatolij Gustschin13b7ee2a2011-04-18 22:01:55 +0200500 u32 tmp;
501
502 dev_dbg(dev, "suspend=%d already_suspended=%d\n",
503 pdata->suspended, pdata->already_suspended);
504
505 /*
506 * If the controller was already suspended at suspend time,
507 * then don't resume it now.
508 */
509 if (pdata->already_suspended) {
510 dev_dbg(dev, "already suspended, leaving early\n");
511 pdata->already_suspended = 0;
512 return 0;
513 }
514
515 if (!pdata->suspended) {
516 dev_dbg(dev, "not suspended, leaving early\n");
517 return 0;
518 }
519
520 pdata->suspended = 0;
521
522 dev_dbg(dev, "resuming...\n");
523
524 /* set host mode */
525 tmp = USBMODE_CM_HOST | (pdata->es ? USBMODE_ES : 0);
526 ehci_writel(ehci, tmp, hcd->regs + FSL_SOC_USB_USBMODE);
527
528 ehci_writel(ehci, pdata->pm_usbgenctrl,
529 hcd->regs + FSL_SOC_USB_USBGENCTRL);
530 ehci_writel(ehci, ISIPHYCTRL_PXE | ISIPHYCTRL_PHYE,
531 hcd->regs + FSL_SOC_USB_ISIPHYCTRL);
532
Anatolij Gustschin761bbcb2012-01-24 22:17:38 +0100533 ehci_writel(ehci, SBUSCFG_INCR8, hcd->regs + FSL_SOC_USB_SBUSCFG);
534
Anatolij Gustschin13b7ee2a2011-04-18 22:01:55 +0200535 /* restore EHCI registers */
536 ehci_writel(ehci, pdata->pm_command, &ehci->regs->command);
537 ehci_writel(ehci, pdata->pm_intr_enable, &ehci->regs->intr_enable);
538 ehci_writel(ehci, pdata->pm_frame_index, &ehci->regs->frame_index);
539 ehci_writel(ehci, pdata->pm_segment, &ehci->regs->segment);
540 ehci_writel(ehci, pdata->pm_frame_list, &ehci->regs->frame_list);
541 ehci_writel(ehci, pdata->pm_async_next, &ehci->regs->async_next);
542 ehci_writel(ehci, pdata->pm_configured_flag,
543 &ehci->regs->configured_flag);
544 ehci_writel(ehci, pdata->pm_portsc, &ehci->regs->port_status[0]);
545
546 set_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags);
Alan Sterne8799902011-08-18 16:31:30 -0400547 ehci->rh_state = EHCI_RH_RUNNING;
Anatolij Gustschin13b7ee2a2011-04-18 22:01:55 +0200548 dev->power.power_state = PMSG_ON;
549
550 tmp = ehci_readl(ehci, &ehci->regs->command);
551 tmp |= CMD_RUN;
552 ehci_writel(ehci, tmp, &ehci->regs->command);
553
554 usb_hcd_resume_root_hub(hcd);
555
556 return 0;
557}
558#else
559static inline int ehci_fsl_mpc512x_drv_suspend(struct device *dev)
560{
561 return 0;
562}
563
564static inline int ehci_fsl_mpc512x_drv_resume(struct device *dev)
565{
566 return 0;
567}
568#endif /* CONFIG_PPC_MPC512x */
569
Anton Vorontsov1af10772009-12-14 18:41:12 +0300570static struct ehci_fsl *hcd_to_ehci_fsl(struct usb_hcd *hcd)
571{
572 struct ehci_hcd *ehci = hcd_to_ehci(hcd);
573
574 return container_of(ehci, struct ehci_fsl, ehci);
575}
576
577static int ehci_fsl_drv_suspend(struct device *dev)
578{
579 struct usb_hcd *hcd = dev_get_drvdata(dev);
580 struct ehci_fsl *ehci_fsl = hcd_to_ehci_fsl(hcd);
581 void __iomem *non_ehci = hcd->regs;
582
Anatolij Gustschin13b7ee2a2011-04-18 22:01:55 +0200583 if (of_device_is_compatible(dev->parent->of_node,
584 "fsl,mpc5121-usb2-dr")) {
585 return ehci_fsl_mpc512x_drv_suspend(dev);
586 }
587
Alan Stern41472002010-06-25 14:02:14 -0400588 ehci_prepare_ports_for_controller_suspend(hcd_to_ehci(hcd),
589 device_may_wakeup(dev));
Anton Vorontsov1af10772009-12-14 18:41:12 +0300590 if (!fsl_deep_sleep())
591 return 0;
592
Sriram Dash6f5429d2015-12-18 14:16:29 +0530593 ehci_fsl->usb_ctrl = ioread32be(non_ehci + FSL_SOC_USB_CTRL);
Anton Vorontsov1af10772009-12-14 18:41:12 +0300594 return 0;
595}
596
597static int ehci_fsl_drv_resume(struct device *dev)
598{
599 struct usb_hcd *hcd = dev_get_drvdata(dev);
600 struct ehci_fsl *ehci_fsl = hcd_to_ehci_fsl(hcd);
601 struct ehci_hcd *ehci = hcd_to_ehci(hcd);
602 void __iomem *non_ehci = hcd->regs;
603
Anatolij Gustschin13b7ee2a2011-04-18 22:01:55 +0200604 if (of_device_is_compatible(dev->parent->of_node,
605 "fsl,mpc5121-usb2-dr")) {
606 return ehci_fsl_mpc512x_drv_resume(dev);
607 }
608
Alan Stern16032c42010-05-12 18:21:35 -0400609 ehci_prepare_ports_for_controller_resume(ehci);
Anton Vorontsov1af10772009-12-14 18:41:12 +0300610 if (!fsl_deep_sleep())
611 return 0;
612
613 usb_root_hub_lost_power(hcd->self.root_hub);
614
615 /* Restore USB PHY settings and enable the controller. */
Sriram Dash6f5429d2015-12-18 14:16:29 +0530616 iowrite32be(ehci_fsl->usb_ctrl, non_ehci + FSL_SOC_USB_CTRL);
Anton Vorontsov1af10772009-12-14 18:41:12 +0300617
618 ehci_reset(ehci);
619 ehci_fsl_reinit(ehci);
620
621 return 0;
622}
623
624static int ehci_fsl_drv_restore(struct device *dev)
625{
626 struct usb_hcd *hcd = dev_get_drvdata(dev);
627
628 usb_root_hub_lost_power(hcd->self.root_hub);
629 return 0;
630}
631
Bhumika Goyalfd7723e2017-01-15 17:23:25 +0530632static const struct dev_pm_ops ehci_fsl_pm_ops = {
Anton Vorontsov1af10772009-12-14 18:41:12 +0300633 .suspend = ehci_fsl_drv_suspend,
634 .resume = ehci_fsl_drv_resume,
635 .restore = ehci_fsl_drv_restore,
636};
637
638#define EHCI_FSL_PM_OPS (&ehci_fsl_pm_ops)
639#else
640#define EHCI_FSL_PM_OPS NULL
641#endif /* CONFIG_PM */
642
Anatolij Gustschin83722bc2011-04-18 22:02:00 +0200643#ifdef CONFIG_USB_OTG
644static int ehci_start_port_reset(struct usb_hcd *hcd, unsigned port)
645{
646 struct ehci_hcd *ehci = hcd_to_ehci(hcd);
647 u32 status;
648
649 if (!port)
650 return -EINVAL;
651
652 port--;
653
654 /* start port reset before HNP protocol time out */
655 status = readl(&ehci->regs->port_status[port]);
656 if (!(status & PORT_CONNECT))
657 return -ENODEV;
658
Petr Mladek37ebb542014-09-19 17:32:23 +0200659 /* hub_wq will finish the reset later */
Anatolij Gustschin83722bc2011-04-18 22:02:00 +0200660 if (ehci_is_TDI(ehci)) {
661 writel(PORT_RESET |
662 (status & ~(PORT_CSC | PORT_PEC | PORT_OCC)),
663 &ehci->regs->port_status[port]);
664 } else {
665 writel(PORT_RESET, &ehci->regs->port_status[port]);
666 }
667
668 return 0;
669}
670#else
671#define ehci_start_port_reset NULL
672#endif /* CONFIG_USB_OTG */
673
Bhumika Goyalb491f612017-08-30 14:35:25 +0530674static const struct ehci_driver_overrides ehci_fsl_overrides __initconst = {
Ramneek Mehreshca07e1c2015-05-14 19:04:46 +0530675 .extra_priv_size = sizeof(struct ehci_fsl),
Randy Vinson80cb9ae2006-01-20 13:53:38 -0800676 .reset = ehci_fsl_setup,
Randy Vinson80cb9ae2006-01-20 13:53:38 -0800677};
678
Ramneek Mehreshca07e1c2015-05-14 19:04:46 +0530679/**
680 * fsl_ehci_drv_remove - shutdown processing for FSL-based HCDs
Lee Jones1a896832020-07-06 14:33:26 +0100681 * @pdev: USB Host Controller being removed
Ahmed S. Darwish19220ba2020-10-19 12:06:37 +0200682 *
683 * Context: task context, might sleep
Ramneek Mehreshca07e1c2015-05-14 19:04:46 +0530684 *
685 * Reverses the effect of usb_hcd_fsl_probe().
Ramneek Mehreshca07e1c2015-05-14 19:04:46 +0530686 */
Ramneek Mehreshca07e1c2015-05-14 19:04:46 +0530687static int fsl_ehci_drv_remove(struct platform_device *pdev)
Randy Vinson80cb9ae2006-01-20 13:53:38 -0800688{
Ramneek Mehreshca07e1c2015-05-14 19:04:46 +0530689 struct fsl_usb2_platform_data *pdata = dev_get_platdata(&pdev->dev);
Randy Vinson80cb9ae2006-01-20 13:53:38 -0800690 struct usb_hcd *hcd = platform_get_drvdata(pdev);
691
Ramneek Mehreshca07e1c2015-05-14 19:04:46 +0530692 if (!IS_ERR_OR_NULL(hcd->usb_phy)) {
693 otg_set_host(hcd->usb_phy->otg, NULL);
694 usb_put_phy(hcd->usb_phy);
695 }
696
697 usb_remove_hcd(hcd);
698
699 /*
700 * do platform specific un-initialization:
701 * release iomux pins, disable clock, etc.
702 */
703 if (pdata->exit)
704 pdata->exit(pdev);
705 usb_put_hcd(hcd);
706
Randy Vinson80cb9ae2006-01-20 13:53:38 -0800707 return 0;
708}
709
Kumar Gala01cced22006-04-11 10:07:16 -0500710static struct platform_driver ehci_fsl_driver = {
Ramneek Mehreshca07e1c2015-05-14 19:04:46 +0530711 .probe = fsl_ehci_drv_probe,
712 .remove = fsl_ehci_drv_remove,
Aleksey Gorelov64a21d02006-08-08 17:24:08 -0700713 .shutdown = usb_hcd_platform_shutdown,
Randy Vinson80cb9ae2006-01-20 13:53:38 -0800714 .driver = {
Anton Vorontsov1af10772009-12-14 18:41:12 +0300715 .name = "fsl-ehci",
716 .pm = EHCI_FSL_PM_OPS,
David Brownell135db042008-02-11 18:40:46 -0800717 },
Randy Vinson80cb9ae2006-01-20 13:53:38 -0800718};
Ramneek Mehreshca07e1c2015-05-14 19:04:46 +0530719
720static int __init ehci_fsl_init(void)
721{
722 if (usb_disabled())
723 return -ENODEV;
724
Ramneek Mehreshca07e1c2015-05-14 19:04:46 +0530725 ehci_init_driver(&fsl_ehci_hc_driver, &ehci_fsl_overrides);
726
727 fsl_ehci_hc_driver.product_desc =
728 "Freescale On-Chip EHCI Host Controller";
729 fsl_ehci_hc_driver.start_port_reset = ehci_start_port_reset;
730
731
732 return platform_driver_register(&ehci_fsl_driver);
733}
734module_init(ehci_fsl_init);
735
736static void __exit ehci_fsl_cleanup(void)
737{
738 platform_driver_unregister(&ehci_fsl_driver);
739}
740module_exit(ehci_fsl_cleanup);
741
742MODULE_DESCRIPTION(DRIVER_DESC);
743MODULE_LICENSE("GPL");
744MODULE_ALIAS("platform:" DRV_NAME);