1 /* SPDX-License-Identifier: GPL-2.0 */
3 * Cadence USB3 and USBSSP DRD header file.
5 * Copyright (C) 2018-2020 Cadence.
9 #ifndef __LINUX_CDNS3_DRD
10 #define __LINUX_CDNS3_DRD
12 #include <linux/usb/otg.h>
15 /* DRD register interface for version v1 of cdns3 driver. */
16 struct cdns3_otg_regs {
40 /* DRD register interface for version v0 of cdns3 driver. */
41 struct cdns3_otg_legacy_regs {
59 /* DRD register interface for cdnsp driver */
60 struct cdnsp_otg_regs {
77 __le32 vbusvalid_dbnc_cfg;
78 __le32 sessvalid_dbnc_cfg;
79 __le32 susp_timing_ctrl;
82 #define OTG_CDNSP_DID 0x0004034E
85 * Common registers interface for both CDNS3 and CDNSP version of DRD.
87 struct cdns_otg_common_regs {
94 * Interrupt related registers. This registers are mapped in different
95 * location for CDNSP controller.
97 struct cdns_otg_irq_regs {
102 /* CDNS_RID - bitmasks */
103 #define CDNS_RID(p) ((p) & GENMASK(15, 0))
105 /* CDNS_VID - bitmasks */
106 #define CDNS_DID(p) ((p) & GENMASK(31, 0))
108 /* OTGCMD - bitmasks */
109 /* "Request the bus for Device mode. */
110 #define OTGCMD_DEV_BUS_REQ BIT(0)
111 /* Request the bus for Host mode */
112 #define OTGCMD_HOST_BUS_REQ BIT(1)
113 /* Enable OTG mode. */
114 #define OTGCMD_OTG_EN BIT(2)
115 /* Disable OTG mode */
116 #define OTGCMD_OTG_DIS BIT(3)
117 /*"Configure OTG as A-Device. */
118 #define OTGCMD_A_DEV_EN BIT(4)
119 /*"Configure OTG as A-Device. */
120 #define OTGCMD_A_DEV_DIS BIT(5)
121 /* Drop the bus for Device mod e. */
122 #define OTGCMD_DEV_BUS_DROP BIT(8)
123 /* Drop the bus for Host mode*/
124 #define OTGCMD_HOST_BUS_DROP BIT(9)
125 /* Power Down USBSS-DEV - only for CDNS3.*/
126 #define OTGCMD_DEV_POWER_OFF BIT(11)
127 /* Power Down CDNSXHCI - only for CDNS3. */
128 #define OTGCMD_HOST_POWER_OFF BIT(12)
130 /* OTGIEN - bitmasks */
131 /* ID change interrupt enable */
132 #define OTGIEN_ID_CHANGE_INT BIT(0)
133 /* Vbusvalid fall detected interrupt enable.*/
134 #define OTGIEN_VBUSVALID_RISE_INT BIT(4)
135 /* Vbusvalid fall detected interrupt enable */
136 #define OTGIEN_VBUSVALID_FALL_INT BIT(5)
138 /* OTGSTS - bitmasks */
140 * Current value of the ID pin. It is only valid when idpullup in
141 * OTGCTRL1_TYPE register is set to '1'.
143 #define OTGSTS_ID_VALUE BIT(0)
144 /* Current value of the vbus_valid */
145 #define OTGSTS_VBUS_VALID BIT(1)
146 /* Current value of the b_sess_vld */
147 #define OTGSTS_SESSION_VALID BIT(2)
148 /*Device mode is active*/
149 #define OTGSTS_DEV_ACTIVE BIT(3)
150 /* Host mode is active. */
151 #define OTGSTS_HOST_ACTIVE BIT(4)
152 /* OTG Controller not ready. */
153 #define OTGSTS_OTG_NRDY_MASK BIT(11)
154 #define OTGSTS_OTG_NRDY(p) ((p) & OTGSTS_OTG_NRDY_MASK)
156 * Value of the strap pins for:
158 * 000 - no default configuration
159 * 010 - Controller initiall configured as Host
160 * 100 - Controller initially configured as Device
162 * 000 - No default configuration.
163 * 010 - Controller initiall configured as Host.
164 * 100 - Controller initially configured as Device.
166 #define OTGSTS_STRAP(p) (((p) & GENMASK(14, 12)) >> 12)
167 #define OTGSTS_STRAP_NO_DEFAULT_CFG 0x00
168 #define OTGSTS_STRAP_HOST_OTG 0x01
169 #define OTGSTS_STRAP_HOST 0x02
170 #define OTGSTS_STRAP_GADGET 0x04
171 #define OTGSTS_CDNSP_STRAP_HOST 0x01
172 #define OTGSTS_CDNSP_STRAP_GADGET 0x02
174 /* Host mode is turned on. */
175 #define OTGSTS_CDNS3_XHCI_READY BIT(26)
176 #define OTGSTS_CDNSP_XHCI_READY BIT(27)
178 /* "Device mode is turned on .*/
179 #define OTGSTS_CDNS3_DEV_READY BIT(27)
180 #define OTGSTS_CDNSP_DEV_READY BIT(26)
182 /* OTGSTATE- bitmasks */
183 #define OTGSTATE_DEV_STATE_MASK GENMASK(2, 0)
184 #define OTGSTATE_HOST_STATE_MASK GENMASK(5, 3)
185 #define OTGSTATE_HOST_STATE_IDLE 0x0
186 #define OTGSTATE_HOST_STATE_VBUS_FALL 0x7
187 #define OTGSTATE_HOST_STATE(p) (((p) & OTGSTATE_HOST_STATE_MASK) >> 3)
189 /* OTGREFCLK - bitmasks */
190 #define OTGREFCLK_STB_CLK_SWITCH_EN BIT(31)
192 /* OVERRIDE - bitmasks */
193 #define OVERRIDE_IDPULLUP BIT(0)
194 /* Only for CDNS3_CONTROLLER_V0 version */
195 #define OVERRIDE_IDPULLUP_V0 BIT(24)
196 /* Vbusvalid/Sesvalid override select. */
197 #define OVERRIDE_SESS_VLD_SEL BIT(10)
199 /* PHYRST_CFG - bitmasks */
200 #define PHYRST_CFG_PHYRST_A_ENABLE BIT(0)
202 #define CDNS3_ID_PERIPHERAL 1
203 #define CDNS3_ID_HOST 0
205 bool cdns_is_host(struct cdns *cdns);
206 bool cdns_is_device(struct cdns *cdns);
207 int cdns_get_id(struct cdns *cdns);
208 int cdns_get_vbus(struct cdns *cdns);
209 void cdns_clear_vbus(struct cdns *cdns);
210 void cdns_set_vbus(struct cdns *cdns);
211 int cdns_drd_init(struct cdns *cdns);
212 int cdns_drd_exit(struct cdns *cdns);
213 int cdns_drd_update_mode(struct cdns *cdns);
214 int cdns_drd_gadget_on(struct cdns *cdns);
215 void cdns_drd_gadget_off(struct cdns *cdns);
216 int cdns_drd_host_on(struct cdns *cdns);
217 void cdns_drd_host_off(struct cdns *cdns);
218 bool cdns_power_is_lost(struct cdns *cdns);
219 #endif /* __LINUX_CDNS3_DRD */