2 * dwc3-pci.c - PCI Specific glue layer
4 * Copyright (C) 2010-2011 Texas Instruments Incorporated - http://www.ti.com
6 * Authors: Felipe Balbi <balbi@ti.com>,
7 * Sebastian Andrzej Siewior <bigeasy@linutronix.de>
9 * This program is free software: you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License version 2 of
11 * the License as published by the Free Software Foundation.
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
19 #include <linux/kernel.h>
20 #include <linux/module.h>
21 #include <linux/slab.h>
22 #include <linux/pci.h>
23 #include <linux/pm_runtime.h>
24 #include <linux/platform_device.h>
25 #include <linux/gpio/consumer.h>
26 #include <linux/acpi.h>
27 #include <linux/delay.h>
29 #define PCI_DEVICE_ID_SYNOPSYS_HAPSUSB3 0xabcd
30 #define PCI_DEVICE_ID_SYNOPSYS_HAPSUSB3_AXI 0xabce
31 #define PCI_DEVICE_ID_SYNOPSYS_HAPSUSB31 0xabcf
32 #define PCI_DEVICE_ID_INTEL_BYT 0x0f37
33 #define PCI_DEVICE_ID_INTEL_MRFLD 0x119e
34 #define PCI_DEVICE_ID_INTEL_BSW 0x22b7
35 #define PCI_DEVICE_ID_INTEL_SPTLP 0x9d30
36 #define PCI_DEVICE_ID_INTEL_SPTH 0xa130
37 #define PCI_DEVICE_ID_INTEL_BXT 0x0aaa
38 #define PCI_DEVICE_ID_INTEL_BXT_M 0x1aaa
39 #define PCI_DEVICE_ID_INTEL_APL 0x5aaa
40 #define PCI_DEVICE_ID_INTEL_KBP 0xa2b0
42 static const struct acpi_gpio_params reset_gpios
= { 0, 0, false };
43 static const struct acpi_gpio_params cs_gpios
= { 1, 0, false };
45 static const struct acpi_gpio_mapping acpi_dwc3_byt_gpios
[] = {
46 { "reset-gpios", &reset_gpios
, 1 },
47 { "cs-gpios", &cs_gpios
, 1 },
51 static int dwc3_pci_quirks(struct pci_dev
*pdev
, struct platform_device
*dwc3
)
53 if (pdev
->vendor
== PCI_VENDOR_ID_AMD
&&
54 pdev
->device
== PCI_DEVICE_ID_AMD_NL_USB
) {
55 struct property_entry properties
[] = {
56 PROPERTY_ENTRY_BOOL("snps,has-lpm-erratum"),
57 PROPERTY_ENTRY_U8("snps,lpm-nyet-threshold", 0xf),
58 PROPERTY_ENTRY_BOOL("snps,u2exit_lfps_quirk"),
59 PROPERTY_ENTRY_BOOL("snps,u2ss_inp3_quirk"),
60 PROPERTY_ENTRY_BOOL("snps,req_p1p2p3_quirk"),
61 PROPERTY_ENTRY_BOOL("snps,del_p1p2p3_quirk"),
62 PROPERTY_ENTRY_BOOL("snps,del_phy_power_chg_quirk"),
63 PROPERTY_ENTRY_BOOL("snps,lfps_filter_quirk"),
64 PROPERTY_ENTRY_BOOL("snps,rx_detect_poll_quirk"),
65 PROPERTY_ENTRY_BOOL("snps,tx_de_emphasis_quirk"),
66 PROPERTY_ENTRY_U8("snps,tx_de_emphasis", 1),
68 * FIXME these quirks should be removed when AMD NL
71 PROPERTY_ENTRY_BOOL("snps,disable_scramble_quirk"),
72 PROPERTY_ENTRY_BOOL("snps,dis_u3_susphy_quirk"),
73 PROPERTY_ENTRY_BOOL("snps,dis_u2_susphy_quirk"),
77 return platform_device_add_properties(dwc3
, properties
);
80 if (pdev
->vendor
== PCI_VENDOR_ID_INTEL
) {
83 struct property_entry properties
[] = {
84 PROPERTY_ENTRY_STRING("dr-mode", "peripheral"),
88 ret
= platform_device_add_properties(dwc3
, properties
);
92 if (pdev
->device
== PCI_DEVICE_ID_INTEL_BYT
) {
93 struct gpio_desc
*gpio
;
95 acpi_dev_add_driver_gpios(ACPI_COMPANION(&pdev
->dev
),
99 * These GPIOs will turn on the USB2 PHY. Note that we have to
100 * put the gpio descriptors again here because the phy driver
101 * might want to grab them, too.
103 gpio
= gpiod_get_optional(&pdev
->dev
, "cs", GPIOD_OUT_LOW
);
105 return PTR_ERR(gpio
);
107 gpiod_set_value_cansleep(gpio
, 1);
110 gpio
= gpiod_get_optional(&pdev
->dev
, "reset", GPIOD_OUT_LOW
);
112 return PTR_ERR(gpio
);
115 gpiod_set_value_cansleep(gpio
, 1);
117 usleep_range(10000, 11000);
122 if (pdev
->vendor
== PCI_VENDOR_ID_SYNOPSYS
&&
123 (pdev
->device
== PCI_DEVICE_ID_SYNOPSYS_HAPSUSB3
||
124 pdev
->device
== PCI_DEVICE_ID_SYNOPSYS_HAPSUSB3_AXI
||
125 pdev
->device
== PCI_DEVICE_ID_SYNOPSYS_HAPSUSB31
)) {
126 struct property_entry properties
[] = {
127 PROPERTY_ENTRY_BOOL("snps,usb3_lpm_capable"),
128 PROPERTY_ENTRY_BOOL("snps,has-lpm-erratum"),
129 PROPERTY_ENTRY_BOOL("snps,dis_enblslpm_quirk"),
133 return platform_device_add_properties(dwc3
, properties
);
139 static int dwc3_pci_probe(struct pci_dev
*pci
,
140 const struct pci_device_id
*id
)
142 struct resource res
[2];
143 struct platform_device
*dwc3
;
145 struct device
*dev
= &pci
->dev
;
147 ret
= pcim_enable_device(pci
);
149 dev_err(dev
, "failed to enable pci device\n");
155 dwc3
= platform_device_alloc("dwc3", PLATFORM_DEVID_AUTO
);
157 dev_err(dev
, "couldn't allocate dwc3 device\n");
161 memset(res
, 0x00, sizeof(struct resource
) * ARRAY_SIZE(res
));
163 res
[0].start
= pci_resource_start(pci
, 0);
164 res
[0].end
= pci_resource_end(pci
, 0);
165 res
[0].name
= "dwc_usb3";
166 res
[0].flags
= IORESOURCE_MEM
;
168 res
[1].start
= pci
->irq
;
169 res
[1].name
= "dwc_usb3";
170 res
[1].flags
= IORESOURCE_IRQ
;
172 ret
= platform_device_add_resources(dwc3
, res
, ARRAY_SIZE(res
));
174 dev_err(dev
, "couldn't add resources to dwc3 device\n");
178 dwc3
->dev
.parent
= dev
;
179 ACPI_COMPANION_SET(&dwc3
->dev
, ACPI_COMPANION(dev
));
181 ret
= dwc3_pci_quirks(pci
, dwc3
);
185 ret
= platform_device_add(dwc3
);
187 dev_err(dev
, "failed to register dwc3 device\n");
191 device_init_wakeup(dev
, true);
192 device_set_run_wake(dev
, true);
193 pci_set_drvdata(pci
, dwc3
);
198 platform_device_put(dwc3
);
202 static void dwc3_pci_remove(struct pci_dev
*pci
)
204 device_init_wakeup(&pci
->dev
, false);
205 pm_runtime_get(&pci
->dev
);
206 acpi_dev_remove_driver_gpios(ACPI_COMPANION(&pci
->dev
));
207 platform_device_unregister(pci_get_drvdata(pci
));
210 static const struct pci_device_id dwc3_pci_id_table
[] = {
212 PCI_DEVICE(PCI_VENDOR_ID_SYNOPSYS
,
213 PCI_DEVICE_ID_SYNOPSYS_HAPSUSB3
),
216 PCI_DEVICE(PCI_VENDOR_ID_SYNOPSYS
,
217 PCI_DEVICE_ID_SYNOPSYS_HAPSUSB3_AXI
),
220 PCI_DEVICE(PCI_VENDOR_ID_SYNOPSYS
,
221 PCI_DEVICE_ID_SYNOPSYS_HAPSUSB31
),
223 { PCI_DEVICE(PCI_VENDOR_ID_INTEL
, PCI_DEVICE_ID_INTEL_BSW
), },
224 { PCI_DEVICE(PCI_VENDOR_ID_INTEL
, PCI_DEVICE_ID_INTEL_BYT
), },
225 { PCI_DEVICE(PCI_VENDOR_ID_INTEL
, PCI_DEVICE_ID_INTEL_MRFLD
), },
226 { PCI_DEVICE(PCI_VENDOR_ID_INTEL
, PCI_DEVICE_ID_INTEL_SPTLP
), },
227 { PCI_DEVICE(PCI_VENDOR_ID_INTEL
, PCI_DEVICE_ID_INTEL_SPTH
), },
228 { PCI_DEVICE(PCI_VENDOR_ID_INTEL
, PCI_DEVICE_ID_INTEL_BXT
), },
229 { PCI_DEVICE(PCI_VENDOR_ID_INTEL
, PCI_DEVICE_ID_INTEL_BXT_M
), },
230 { PCI_DEVICE(PCI_VENDOR_ID_INTEL
, PCI_DEVICE_ID_INTEL_APL
), },
231 { PCI_DEVICE(PCI_VENDOR_ID_INTEL
, PCI_DEVICE_ID_INTEL_KBP
), },
232 { PCI_DEVICE(PCI_VENDOR_ID_AMD
, PCI_DEVICE_ID_AMD_NL_USB
), },
233 { } /* Terminating Entry */
235 MODULE_DEVICE_TABLE(pci
, dwc3_pci_id_table
);
238 static int dwc3_pci_runtime_suspend(struct device
*dev
)
240 if (device_run_wake(dev
))
246 static int dwc3_pci_runtime_resume(struct device
*dev
)
248 struct platform_device
*dwc3
= dev_get_drvdata(dev
);
250 return pm_runtime_get(&dwc3
->dev
);
252 #endif /* CONFIG_PM */
254 #ifdef CONFIG_PM_SLEEP
255 static int dwc3_pci_pm_dummy(struct device
*dev
)
258 * There's nothing to do here. No, seriously. Everything is either taken
259 * care either by PCI subsystem or dwc3/core.c, so we have nothing
262 * So you'd think we didn't need this at all, but PCI subsystem will
263 * bail out if we don't have a valid callback :-s
267 #endif /* CONFIG_PM_SLEEP */
269 static struct dev_pm_ops dwc3_pci_dev_pm_ops
= {
270 SET_SYSTEM_SLEEP_PM_OPS(dwc3_pci_pm_dummy
, dwc3_pci_pm_dummy
)
271 SET_RUNTIME_PM_OPS(dwc3_pci_runtime_suspend
, dwc3_pci_runtime_resume
,
275 static struct pci_driver dwc3_pci_driver
= {
277 .id_table
= dwc3_pci_id_table
,
278 .probe
= dwc3_pci_probe
,
279 .remove
= dwc3_pci_remove
,
281 .pm
= &dwc3_pci_dev_pm_ops
,
285 MODULE_AUTHOR("Felipe Balbi <balbi@ti.com>");
286 MODULE_LICENSE("GPL v2");
287 MODULE_DESCRIPTION("DesignWare USB3 PCI Glue Layer");
289 module_pci_driver(dwc3_pci_driver
);