1 /* SPDX-License-Identifier: GPL-2.0 */
3 /* PORTSC - Port Status and Control Register - port_status_base bitmasks */
4 /* true: device connected */
5 #define PORT_CONNECT (1 << 0)
6 /* true: port enabled */
7 #define PORT_PE (1 << 1)
8 /* bit 2 reserved and zeroed */
9 /* true: port has an over-current condition */
10 #define PORT_OC (1 << 3)
11 /* true: port reset signaling asserted */
12 #define PORT_RESET (1 << 4)
13 /* Port Link State - bits 5:8
14 * A read gives the current link PM state of the port,
15 * a write with Link State Write Strobe set sets the link state.
17 #define PORT_PLS_MASK (0xf << 5)
18 #define XDEV_U0 (0x0 << 5)
19 #define XDEV_U1 (0x1 << 5)
20 #define XDEV_U2 (0x2 << 5)
21 #define XDEV_U3 (0x3 << 5)
22 #define XDEV_DISABLED (0x4 << 5)
23 #define XDEV_RXDETECT (0x5 << 5)
24 #define XDEV_INACTIVE (0x6 << 5)
25 #define XDEV_POLLING (0x7 << 5)
26 #define XDEV_RECOVERY (0x8 << 5)
27 #define XDEV_HOT_RESET (0x9 << 5)
28 #define XDEV_COMP_MODE (0xa << 5)
29 #define XDEV_TEST_MODE (0xb << 5)
30 #define XDEV_RESUME (0xf << 5)
32 /* true: port has power (see HCC_PPC) */
33 #define PORT_POWER (1 << 9)
34 /* bits 10:13 indicate device speed:
35 * 0 - undefined speed - port hasn't be initialized by a reset yet
42 #define DEV_SPEED_MASK (0xf << 10)
43 #define XDEV_FS (0x1 << 10)
44 #define XDEV_LS (0x2 << 10)
45 #define XDEV_HS (0x3 << 10)
46 #define XDEV_SS (0x4 << 10)
47 #define XDEV_SSP (0x5 << 10)
48 #define DEV_UNDEFSPEED(p) (((p) & DEV_SPEED_MASK) == (0x0<<10))
49 #define DEV_FULLSPEED(p) (((p) & DEV_SPEED_MASK) == XDEV_FS)
50 #define DEV_LOWSPEED(p) (((p) & DEV_SPEED_MASK) == XDEV_LS)
51 #define DEV_HIGHSPEED(p) (((p) & DEV_SPEED_MASK) == XDEV_HS)
52 #define DEV_SUPERSPEED(p) (((p) & DEV_SPEED_MASK) == XDEV_SS)
53 #define DEV_SUPERSPEEDPLUS(p) (((p) & DEV_SPEED_MASK) == XDEV_SSP)
54 #define DEV_SUPERSPEED_ANY(p) (((p) & DEV_SPEED_MASK) >= XDEV_SS)
55 #define DEV_PORT_SPEED(p) (((p) >> 10) & 0x0f)
57 /* Bits 20:23 in the Slot Context are the speed for the device */
58 #define SLOT_SPEED_FS (XDEV_FS << 10)
59 #define SLOT_SPEED_LS (XDEV_LS << 10)
60 #define SLOT_SPEED_HS (XDEV_HS << 10)
61 #define SLOT_SPEED_SS (XDEV_SS << 10)
62 #define SLOT_SPEED_SSP (XDEV_SSP << 10)
63 /* Port Indicator Control */
64 #define PORT_LED_OFF (0 << 14)
65 #define PORT_LED_AMBER (1 << 14)
66 #define PORT_LED_GREEN (2 << 14)
67 #define PORT_LED_MASK (3 << 14)
68 /* Port Link State Write Strobe - set this when changing link state */
69 #define PORT_LINK_STROBE (1 << 16)
70 /* true: connect status change */
71 #define PORT_CSC (1 << 17)
72 /* true: port enable change */
73 #define PORT_PEC (1 << 18)
74 /* true: warm reset for a USB 3.0 device is done. A "hot" reset puts the port
75 * into an enabled state, and the device into the default state. A "warm" reset
76 * also resets the link, forcing the device through the link training sequence.
77 * SW can also look at the Port Reset register to see when warm reset is done.
79 #define PORT_WRC (1 << 19)
80 /* true: over-current change */
81 #define PORT_OCC (1 << 20)
82 /* true: reset change - 1 to 0 transition of PORT_RESET */
83 #define PORT_RC (1 << 21)
84 /* port link status change - set on some port link state transitions:
86 * ------------------------------------------------------------------------------
87 * - U3 to Resume Wakeup signaling from a device
88 * - Resume to Recovery to U0 USB 3.0 device resume
89 * - Resume to U0 USB 2.0 device resume
90 * - U3 to Recovery to U0 Software resume of USB 3.0 device complete
91 * - U3 to U0 Software resume of USB 2.0 device complete
92 * - U2 to U0 L1 resume of USB 2.1 device complete
93 * - U0 to U0 (???) L1 entry rejection by USB 2.1 device
94 * - U0 to disabled L1 entry error with USB 2.1 device
95 * - Any state to inactive Error on USB 3.0 port
97 #define PORT_PLC (1 << 22)
98 /* port configure error change - port failed to configure its link partner */
99 #define PORT_CEC (1 << 23)
100 #define PORT_CHANGE_MASK (PORT_CSC | PORT_PEC | PORT_WRC | PORT_OCC | \
101 PORT_RC | PORT_PLC | PORT_CEC)
104 /* Cold Attach Status - xHC can set this bit to report device attached during
105 * Sx state. Warm port reset should be perfomed to clear this bit and move port
106 * to connected state.
108 #define PORT_CAS (1 << 24)
109 /* wake on connect (enable) */
110 #define PORT_WKCONN_E (1 << 25)
111 /* wake on disconnect (enable) */
112 #define PORT_WKDISC_E (1 << 26)
113 /* wake on over-current (enable) */
114 #define PORT_WKOC_E (1 << 27)
115 /* bits 28:29 reserved */
116 /* true: device is non-removable - for USB 3.0 roothub emulation */
117 #define PORT_DEV_REMOVE (1 << 30)
118 /* Initiate a warm port reset - complete when PORT_WRC is '1' */
119 #define PORT_WR (1 << 31)
121 /* We mark duplicate entries with -1 */
122 #define DUPLICATE_ENTRY ((u8)(-1))
124 /* Port Power Management Status and Control - port_power_base bitmasks */
125 /* Inactivity timer value for transitions into U1, in microseconds.
126 * Timeout can be up to 127us. 0xFF means an infinite timeout.
128 #define PORT_U1_TIMEOUT(p) ((p) & 0xff)
129 #define PORT_U1_TIMEOUT_MASK 0xff
130 /* Inactivity timer value for transitions into U2 */
131 #define PORT_U2_TIMEOUT(p) (((p) & 0xff) << 8)
132 #define PORT_U2_TIMEOUT_MASK (0xff << 8)
133 /* Bits 24:31 for port testing */
135 /* USB2 Protocol PORTSPMSC */
136 #define PORT_L1S_MASK 7
137 #define PORT_L1S_SUCCESS 1
138 #define PORT_RWE (1 << 3)
139 #define PORT_HIRD(p) (((p) & 0xf) << 4)
140 #define PORT_HIRD_MASK (0xf << 4)
141 #define PORT_L1DS_MASK (0xff << 8)
142 #define PORT_L1DS(p) (((p) & 0xff) << 8)
143 #define PORT_HLE (1 << 16)
144 #define PORT_TEST_MODE_SHIFT 28
146 /* USB3 Protocol PORTLI Port Link Information */
147 #define PORT_RX_LANES(p) (((p) >> 16) & 0xf)
148 #define PORT_TX_LANES(p) (((p) >> 20) & 0xf)
150 /* USB2 Protocol PORTHLPMC */
151 #define PORT_HIRDM(p)((p) & 3)
152 #define PORT_L1_TIMEOUT(p)(((p) & 0xff) << 2)
153 #define PORT_BESLD(p)(((p) & 0xf) << 10)
155 /* use 512 microseconds as USB2 LPM L1 default timeout. */
156 #define XHCI_L1_TIMEOUT 512
158 /* Set default HIRD/BESL value to 4 (350/400us) for USB2 L1 LPM resume latency.
159 * Safe to use with mixed HIRD and BESL systems (host and device) and is used
160 * by other operating systems.
162 * XHCI 1.0 errata 8/14/12 Table 13 notes:
163 * "Software should choose xHC BESL/BESLD field values that do not violate a
164 * device's resume latency requirements,
165 * e.g. not program values > '4' if BLC = '1' and a HIRD device is attached,
166 * or not program values < '4' if BLC = '0' and a BESL device is attached.
168 #define XHCI_DEFAULT_BESL 4
171 * USB3 specification define a 360ms tPollingLFPSTiemout for USB3 ports
172 * to complete link training. usually link trainig completes much faster
173 * so check status 10 times with 36ms sleep in places we need to wait for
174 * polling to complete.
176 #define XHCI_PORT_POLLING_LFPS_TIME 36