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
41 static const struct acpi_gpio_params reset_gpios
= { 0, 0, false };
42 static const struct acpi_gpio_params cs_gpios
= { 1, 0, false };
44 static const struct acpi_gpio_mapping acpi_dwc3_byt_gpios
[] = {
45 { "reset-gpios", &reset_gpios
, 1 },
46 { "cs-gpios", &cs_gpios
, 1 },
50 static int dwc3_pci_quirks(struct pci_dev
*pdev
, struct platform_device
*dwc3
)
52 if (pdev
->vendor
== PCI_VENDOR_ID_AMD
&&
53 pdev
->device
== PCI_DEVICE_ID_AMD_NL_USB
) {
54 struct property_entry properties
[] = {
55 PROPERTY_ENTRY_BOOL("snps,has-lpm-erratum"),
56 PROPERTY_ENTRY_U8("snps,lpm-nyet-threshold", 0xf),
57 PROPERTY_ENTRY_BOOL("snps,u2exit_lfps_quirk"),
58 PROPERTY_ENTRY_BOOL("snps,u2ss_inp3_quirk"),
59 PROPERTY_ENTRY_BOOL("snps,req_p1p2p3_quirk"),
60 PROPERTY_ENTRY_BOOL("snps,del_p1p2p3_quirk"),
61 PROPERTY_ENTRY_BOOL("snps,del_phy_power_chg_quirk"),
62 PROPERTY_ENTRY_BOOL("snps,lfps_filter_quirk"),
63 PROPERTY_ENTRY_BOOL("snps,rx_detect_poll_quirk"),
64 PROPERTY_ENTRY_BOOL("snps,tx_de_emphasis_quirk"),
65 PROPERTY_ENTRY_U8("snps,tx_de_emphasis", 1),
67 * FIXME these quirks should be removed when AMD NL
70 PROPERTY_ENTRY_BOOL("snps,disable_scramble_quirk"),
71 PROPERTY_ENTRY_BOOL("snps,dis_u3_susphy_quirk"),
72 PROPERTY_ENTRY_BOOL("snps,dis_u2_susphy_quirk"),
76 return platform_device_add_properties(dwc3
, properties
);
79 if (pdev
->vendor
== PCI_VENDOR_ID_INTEL
) {
82 struct property_entry properties
[] = {
83 PROPERTY_ENTRY_STRING("dr-mode", "peripheral"),
87 ret
= platform_device_add_properties(dwc3
, properties
);
91 if (pdev
->device
== PCI_DEVICE_ID_INTEL_BYT
) {
92 struct gpio_desc
*gpio
;
94 acpi_dev_add_driver_gpios(ACPI_COMPANION(&pdev
->dev
),
98 * These GPIOs will turn on the USB2 PHY. Note that we have to
99 * put the gpio descriptors again here because the phy driver
100 * might want to grab them, too.
102 gpio
= gpiod_get_optional(&pdev
->dev
, "cs", GPIOD_OUT_LOW
);
104 return PTR_ERR(gpio
);
106 gpiod_set_value_cansleep(gpio
, 1);
109 gpio
= gpiod_get_optional(&pdev
->dev
, "reset", GPIOD_OUT_LOW
);
111 return PTR_ERR(gpio
);
114 gpiod_set_value_cansleep(gpio
, 1);
116 usleep_range(10000, 11000);
121 if (pdev
->vendor
== PCI_VENDOR_ID_SYNOPSYS
&&
122 (pdev
->device
== PCI_DEVICE_ID_SYNOPSYS_HAPSUSB3
||
123 pdev
->device
== PCI_DEVICE_ID_SYNOPSYS_HAPSUSB3_AXI
||
124 pdev
->device
== PCI_DEVICE_ID_SYNOPSYS_HAPSUSB31
)) {
125 struct property_entry properties
[] = {
126 PROPERTY_ENTRY_BOOL("snps,usb3_lpm_capable"),
127 PROPERTY_ENTRY_BOOL("snps,has-lpm-erratum"),
128 PROPERTY_ENTRY_BOOL("snps,dis_enblslpm_quirk"),
132 return platform_device_add_properties(dwc3
, properties
);
138 static int dwc3_pci_probe(struct pci_dev
*pci
,
139 const struct pci_device_id
*id
)
141 struct resource res
[2];
142 struct platform_device
*dwc3
;
144 struct device
*dev
= &pci
->dev
;
146 ret
= pcim_enable_device(pci
);
148 dev_err(dev
, "failed to enable pci device\n");
154 dwc3
= platform_device_alloc("dwc3", PLATFORM_DEVID_AUTO
);
156 dev_err(dev
, "couldn't allocate dwc3 device\n");
160 memset(res
, 0x00, sizeof(struct resource
) * ARRAY_SIZE(res
));
162 res
[0].start
= pci_resource_start(pci
, 0);
163 res
[0].end
= pci_resource_end(pci
, 0);
164 res
[0].name
= "dwc_usb3";
165 res
[0].flags
= IORESOURCE_MEM
;
167 res
[1].start
= pci
->irq
;
168 res
[1].name
= "dwc_usb3";
169 res
[1].flags
= IORESOURCE_IRQ
;
171 ret
= platform_device_add_resources(dwc3
, res
, ARRAY_SIZE(res
));
173 dev_err(dev
, "couldn't add resources to dwc3 device\n");
177 dwc3
->dev
.parent
= dev
;
178 ACPI_COMPANION_SET(&dwc3
->dev
, ACPI_COMPANION(dev
));
180 ret
= dwc3_pci_quirks(pci
, dwc3
);
184 ret
= platform_device_add(dwc3
);
186 dev_err(dev
, "failed to register dwc3 device\n");
190 device_init_wakeup(dev
, true);
191 device_set_run_wake(dev
, true);
192 pci_set_drvdata(pci
, dwc3
);
197 platform_device_put(dwc3
);
201 static void dwc3_pci_remove(struct pci_dev
*pci
)
203 device_init_wakeup(&pci
->dev
, false);
204 pm_runtime_get(&pci
->dev
);
205 acpi_dev_remove_driver_gpios(ACPI_COMPANION(&pci
->dev
));
206 platform_device_unregister(pci_get_drvdata(pci
));
209 static const struct pci_device_id dwc3_pci_id_table
[] = {
211 PCI_DEVICE(PCI_VENDOR_ID_SYNOPSYS
,
212 PCI_DEVICE_ID_SYNOPSYS_HAPSUSB3
),
215 PCI_DEVICE(PCI_VENDOR_ID_SYNOPSYS
,
216 PCI_DEVICE_ID_SYNOPSYS_HAPSUSB3_AXI
),
219 PCI_DEVICE(PCI_VENDOR_ID_SYNOPSYS
,
220 PCI_DEVICE_ID_SYNOPSYS_HAPSUSB31
),
222 { PCI_DEVICE(PCI_VENDOR_ID_INTEL
, PCI_DEVICE_ID_INTEL_BSW
), },
223 { PCI_DEVICE(PCI_VENDOR_ID_INTEL
, PCI_DEVICE_ID_INTEL_BYT
), },
224 { PCI_DEVICE(PCI_VENDOR_ID_INTEL
, PCI_DEVICE_ID_INTEL_MRFLD
), },
225 { PCI_DEVICE(PCI_VENDOR_ID_INTEL
, PCI_DEVICE_ID_INTEL_SPTLP
), },
226 { PCI_DEVICE(PCI_VENDOR_ID_INTEL
, PCI_DEVICE_ID_INTEL_SPTH
), },
227 { PCI_DEVICE(PCI_VENDOR_ID_INTEL
, PCI_DEVICE_ID_INTEL_BXT
), },
228 { PCI_DEVICE(PCI_VENDOR_ID_INTEL
, PCI_DEVICE_ID_INTEL_BXT_M
), },
229 { PCI_DEVICE(PCI_VENDOR_ID_INTEL
, PCI_DEVICE_ID_INTEL_APL
), },
230 { PCI_DEVICE(PCI_VENDOR_ID_AMD
, PCI_DEVICE_ID_AMD_NL_USB
), },
231 { } /* Terminating Entry */
233 MODULE_DEVICE_TABLE(pci
, dwc3_pci_id_table
);
236 static int dwc3_pci_runtime_suspend(struct device
*dev
)
238 if (device_run_wake(dev
))
244 static int dwc3_pci_pm_dummy(struct device
*dev
)
247 * There's nothing to do here. No, seriously. Everything is either taken
248 * care either by PCI subsystem or dwc3/core.c, so we have nothing
251 * So you'd think we didn't need this at all, but PCI subsystem will
252 * bail out if we don't have a valid callback :-s
256 #endif /* CONFIG_PM */
258 static struct dev_pm_ops dwc3_pci_dev_pm_ops
= {
259 SET_SYSTEM_SLEEP_PM_OPS(dwc3_pci_pm_dummy
, dwc3_pci_pm_dummy
)
260 SET_RUNTIME_PM_OPS(dwc3_pci_runtime_suspend
, dwc3_pci_pm_dummy
,
264 static struct pci_driver dwc3_pci_driver
= {
266 .id_table
= dwc3_pci_id_table
,
267 .probe
= dwc3_pci_probe
,
268 .remove
= dwc3_pci_remove
,
270 .pm
= &dwc3_pci_dev_pm_ops
,
274 MODULE_AUTHOR("Felipe Balbi <balbi@ti.com>");
275 MODULE_LICENSE("GPL v2");
276 MODULE_DESCRIPTION("DesignWare USB3 PCI Glue Layer");
278 module_pci_driver(dwc3_pci_driver
);