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Jana Rapavaf93022c2011-12-05 11:07:00 +02001/*
2 * Generic ULPI interface.
3 *
4 * Copyright (C) 2011 Jana Rapava <fermata7@gmail.com>
5 * Copyright (C) 2011 CompuLab, Ltd. <www.compulab.co.il>
6 *
7 * Authors: Jana Rapava <fermata7@gmail.com>
8 * Igor Grinberg <grinberg@compulab.co.il>
9 *
10 * Register offsets taken from:
11 * linux/include/linux/usb/ulpi.h
12 *
13 * Original Copyrights follow:
14 * Copyright (C) 2010 Nokia Corporation
15 *
Tom Rini5b8031c2016-01-14 22:05:13 -050016 * SPDX-License-Identifier: GPL-2.0
Jana Rapavaf93022c2011-12-05 11:07:00 +020017 */
18
19#ifndef __USB_ULPI_H__
20#define __USB_ULPI_H__
21
22#define ULPI_ERROR (1 << 8) /* overflow from any register value */
23
24#ifndef CONFIG_USB_ULPI_TIMEOUT
25#define CONFIG_USB_ULPI_TIMEOUT 1000 /* timeout in us */
26#endif
27
28/*
Govindraj.R3e6e8092012-02-06 03:55:31 +000029 * ulpi view port address and
30 * Port_number that can be passed.
31 * Any additional data to be passed can
32 * be extended from this structure
33 */
34struct ulpi_viewport {
35 u32 viewport_addr;
36 u32 port_num;
37};
38
39/*
Jana Rapavaf93022c2011-12-05 11:07:00 +020040 * Initialize the ULPI transciever and check the interface integrity.
Govindraj.R3e6e8092012-02-06 03:55:31 +000041 * @ulpi_vp - structure containing ULPI viewport data
Jana Rapavaf93022c2011-12-05 11:07:00 +020042 *
43 * returns 0 on success, ULPI_ERROR on failure.
44 */
Govindraj.R3e6e8092012-02-06 03:55:31 +000045int ulpi_init(struct ulpi_viewport *ulpi_vp);
Jana Rapavaf93022c2011-12-05 11:07:00 +020046
47/*
48 * Select transceiver speed.
49 * @speed - ULPI_FC_HIGH_SPEED, ULPI_FC_FULL_SPEED (default),
50 * ULPI_FC_LOW_SPEED, ULPI_FC_FS4LS
51 * returns 0 on success, ULPI_ERROR on failure.
52 */
Govindraj.R3e6e8092012-02-06 03:55:31 +000053int ulpi_select_transceiver(struct ulpi_viewport *ulpi_vp, unsigned speed);
Jana Rapavaf93022c2011-12-05 11:07:00 +020054
55/*
56 * Enable/disable VBUS.
57 * @ext_power - external VBUS supply is used (default is false)
58 * @ext_indicator - external VBUS over-current indicator is used
59 *
60 * returns 0 on success, ULPI_ERROR on failure.
61 */
Lucas Stach141288b2012-10-01 00:44:34 +020062int ulpi_set_vbus(struct ulpi_viewport *ulpi_vp, int on, int ext_power);
63
64/*
65 * Configure VBUS indicator
66 * @external - external VBUS over-current indicator is used
67 * @passthru - disables ANDing of internal VBUS comparator
68 * with external VBUS input
69 * @complement - inverts the external VBUS input
70 */
71int ulpi_set_vbus_indicator(struct ulpi_viewport *ulpi_vp, int external,
72 int passthru, int complement);
Jana Rapavaf93022c2011-12-05 11:07:00 +020073
74/*
75 * Enable/disable pull-down resistors on D+ and D- USB lines.
76 *
77 * returns 0 on success, ULPI_ERROR on failure.
78 */
Govindraj.R3e6e8092012-02-06 03:55:31 +000079int ulpi_set_pd(struct ulpi_viewport *ulpi_vp, int enable);
Jana Rapavaf93022c2011-12-05 11:07:00 +020080
81/*
82 * Select OpMode.
83 * @opmode - ULPI_FC_OPMODE_NORMAL (default), ULPI_FC_OPMODE_NONDRIVING,
84 * ULPI_FC_OPMODE_DISABLE_NRZI, ULPI_FC_OPMODE_NOSYNC_NOEOP
85 *
86 * returns 0 on success, ULPI_ERROR on failure.
87 */
Govindraj.R3e6e8092012-02-06 03:55:31 +000088int ulpi_opmode_sel(struct ulpi_viewport *ulpi_vp, unsigned opmode);
Jana Rapavaf93022c2011-12-05 11:07:00 +020089
90/*
91 * Switch to Serial Mode.
92 * @smode - ULPI_IFACE_6_PIN_SERIAL_MODE or ULPI_IFACE_3_PIN_SERIAL_MODE
93 *
94 * returns 0 on success, ULPI_ERROR on failure.
95 *
96 * Notes:
97 * Switches immediately to Serial Mode.
98 * To return from Serial Mode, STP line needs to be asserted.
99 */
Govindraj.R3e6e8092012-02-06 03:55:31 +0000100int ulpi_serial_mode_enable(struct ulpi_viewport *ulpi_vp, unsigned smode);
Jana Rapavaf93022c2011-12-05 11:07:00 +0200101
102/*
103 * Put PHY into low power mode.
104 *
105 * returns 0 on success, ULPI_ERROR on failure.
106 *
107 * Notes:
108 * STP line must be driven low to keep the PHY in suspend.
109 * To resume the PHY, STP line needs to be asserted.
110 */
Govindraj.R3e6e8092012-02-06 03:55:31 +0000111int ulpi_suspend(struct ulpi_viewport *ulpi_vp);
Jana Rapavaf93022c2011-12-05 11:07:00 +0200112
113/*
114 * Reset the transceiver. ULPI interface and registers are not affected.
115 *
116 * returns 0 on success, ULPI_ERROR on failure.
117 */
Govindraj.R3e6e8092012-02-06 03:55:31 +0000118int ulpi_reset(struct ulpi_viewport *ulpi_vp);
Jana Rapavaf93022c2011-12-05 11:07:00 +0200119
120
121/* ULPI access methods below must be implemented for each ULPI viewport. */
122
123/*
124 * Write to the ULPI PHY register via the viewport.
125 * @reg - the ULPI register (one of the fields in struct ulpi_regs).
126 * @value - the value - only 8 lower bits are used, others ignored.
127 *
128 * returns 0 on success, ULPI_ERROR on failure.
129 */
Govindraj.R3e6e8092012-02-06 03:55:31 +0000130int ulpi_write(struct ulpi_viewport *ulpi_vp, u8 *reg, u32 value);
Jana Rapavaf93022c2011-12-05 11:07:00 +0200131
132/*
133 * Read the ULPI PHY register content via the viewport.
134 * @reg - the ULPI register (one of the fields in struct ulpi_regs).
135 *
136 * returns register content on success, ULPI_ERROR on failure.
137 */
Govindraj.R3e6e8092012-02-06 03:55:31 +0000138u32 ulpi_read(struct ulpi_viewport *ulpi_vp, u8 *reg);
Jana Rapavaf93022c2011-12-05 11:07:00 +0200139
140/*
141 * Wait for the reset to complete.
142 * The Link must not attempt to access the PHY until the reset has
143 * completed and DIR line is de-asserted.
144 */
Govindraj.R3e6e8092012-02-06 03:55:31 +0000145int ulpi_reset_wait(struct ulpi_viewport *ulpi_vp);
Jana Rapavaf93022c2011-12-05 11:07:00 +0200146
147/* Access Extended Register Set (indicator) */
148#define ACCESS_EXT_REGS_OFFSET 0x2f /* read-write */
149/* Vendor-specific */
150#define VENDOR_SPEC_OFFSET 0x30
151
152/*
153 * Extended Register Set
154 *
155 * Addresses 0x00-0x3F map directly to Immediate Register Set.
156 * Addresses 0x40-0x7F are reserved.
157 * Addresses 0x80-0xff are vendor-specific.
158 */
159#define EXT_VENDOR_SPEC_OFFSET 0x80
160
161/* ULPI registers, bits and offsets definitions */
162struct ulpi_regs {
163 /* Vendor ID and Product ID: 0x00 - 0x03 Read-only */
164 u8 vendor_id_low;
165 u8 vendor_id_high;
166 u8 product_id_low;
167 u8 product_id_high;
168 /* Function Control: 0x04 - 0x06 Read */
169 u8 function_ctrl; /* 0x04 Write */
170 u8 function_ctrl_set; /* 0x05 Set */
171 u8 function_ctrl_clear; /* 0x06 Clear */
172 /* Interface Control: 0x07 - 0x09 Read */
173 u8 iface_ctrl; /* 0x07 Write */
174 u8 iface_ctrl_set; /* 0x08 Set */
175 u8 iface_ctrl_clear; /* 0x09 Clear */
176 /* OTG Control: 0x0A - 0x0C Read */
177 u8 otg_ctrl; /* 0x0A Write */
178 u8 otg_ctrl_set; /* 0x0B Set */
179 u8 otg_ctrl_clear; /* 0x0C Clear */
180 /* USB Interrupt Enable Rising: 0x0D - 0x0F Read */
181 u8 usb_ie_rising; /* 0x0D Write */
182 u8 usb_ie_rising_set; /* 0x0E Set */
183 u8 usb_ie_rising_clear; /* 0x0F Clear */
184 /* USB Interrupt Enable Falling: 0x10 - 0x12 Read */
185 u8 usb_ie_falling; /* 0x10 Write */
186 u8 usb_ie_falling_set; /* 0x11 Set */
187 u8 usb_ie_falling_clear; /* 0x12 Clear */
188 /* USB Interrupt Status: 0x13 Read-only */
189 u8 usb_int_status;
190 /* USB Interrupt Latch: 0x14 Read-only with auto-clear */
191 u8 usb_int_latch;
192 /* Debug: 0x15 Read-only */
193 u8 debug;
194 /* Scratch Register: 0x16 - 0x18 Read */
195 u8 scratch; /* 0x16 Write */
196 u8 scratch_set; /* 0x17 Set */
197 u8 scratch_clear; /* 0x18 Clear */
198 /*
199 * Optional Carkit registers:
200 * Carkit Control: 0x19 - 0x1B Read
201 */
202 u8 carkit_ctrl; /* 0x19 Write */
203 u8 carkit_ctrl_set; /* 0x1A Set */
204 u8 carkit_ctrl_clear; /* 0x1B Clear */
205 /* Carkit Interrupt Delay: 0x1C Read, Write */
206 u8 carkit_int_delay;
207 /* Carkit Interrupt Enable: 0x1D - 0x1F Read */
208 u8 carkit_ie; /* 0x1D Write */
209 u8 carkit_ie_set; /* 0x1E Set */
210 u8 carkit_ie_clear; /* 0x1F Clear */
211 /* Carkit Interrupt Status: 0x20 Read-only */
212 u8 carkit_int_status;
213 /* Carkit Interrupt Latch: 0x21 Read-only with auto-clear */
214 u8 carkit_int_latch;
215 /* Carkit Pulse Control: 0x22 - 0x24 Read */
216 u8 carkit_pulse_ctrl; /* 0x22 Write */
217 u8 carkit_pulse_ctrl_set; /* 0x23 Set */
218 u8 carkit_pulse_ctrl_clear; /* 0x24 Clear */
219 /*
220 * Other optional registers:
221 * Transmit Positive Width: 0x25 Read, Write
222 */
223 u8 transmit_pos_width;
224 /* Transmit Negative Width: 0x26 Read, Write */
225 u8 transmit_neg_width;
226 /* Receive Polarity Recovery: 0x27 Read, Write */
227 u8 recv_pol_recovery;
228 /*
229 * Addresses 0x28 - 0x2E are reserved, so we use offsets
230 * for immediate registers with higher addresses
231 */
232};
233
234/*
235 * Register Bits
236 */
237
238/* Function Control */
239#define ULPI_FC_XCVRSEL_MASK (3 << 0)
240#define ULPI_FC_HIGH_SPEED (0 << 0)
241#define ULPI_FC_FULL_SPEED (1 << 0)
242#define ULPI_FC_LOW_SPEED (2 << 0)
243#define ULPI_FC_FS4LS (3 << 0)
244#define ULPI_FC_TERMSELECT (1 << 2)
245#define ULPI_FC_OPMODE_MASK (3 << 3)
246#define ULPI_FC_OPMODE_NORMAL (0 << 3)
247#define ULPI_FC_OPMODE_NONDRIVING (1 << 3)
248#define ULPI_FC_OPMODE_DISABLE_NRZI (2 << 3)
249#define ULPI_FC_OPMODE_NOSYNC_NOEOP (3 << 3)
250#define ULPI_FC_RESET (1 << 5)
251#define ULPI_FC_SUSPENDM (1 << 6)
252
253/* Interface Control */
254#define ULPI_IFACE_6_PIN_SERIAL_MODE (1 << 0)
255#define ULPI_IFACE_3_PIN_SERIAL_MODE (1 << 1)
256#define ULPI_IFACE_CARKITMODE (1 << 2)
257#define ULPI_IFACE_CLOCKSUSPENDM (1 << 3)
258#define ULPI_IFACE_AUTORESUME (1 << 4)
259#define ULPI_IFACE_EXTVBUS_COMPLEMENT (1 << 5)
260#define ULPI_IFACE_PASSTHRU (1 << 6)
261#define ULPI_IFACE_PROTECT_IFC_DISABLE (1 << 7)
262
263/* OTG Control */
264#define ULPI_OTG_ID_PULLUP (1 << 0)
265#define ULPI_OTG_DP_PULLDOWN (1 << 1)
266#define ULPI_OTG_DM_PULLDOWN (1 << 2)
267#define ULPI_OTG_DISCHRGVBUS (1 << 3)
268#define ULPI_OTG_CHRGVBUS (1 << 4)
269#define ULPI_OTG_DRVVBUS (1 << 5)
270#define ULPI_OTG_DRVVBUS_EXT (1 << 6)
271#define ULPI_OTG_EXTVBUSIND (1 << 7)
272
273/*
274 * USB Interrupt Enable Rising,
275 * USB Interrupt Enable Falling,
276 * USB Interrupt Status and
277 * USB Interrupt Latch
278 */
279#define ULPI_INT_HOST_DISCONNECT (1 << 0)
280#define ULPI_INT_VBUS_VALID (1 << 1)
281#define ULPI_INT_SESS_VALID (1 << 2)
282#define ULPI_INT_SESS_END (1 << 3)
283#define ULPI_INT_IDGRD (1 << 4)
284
285/* Debug */
286#define ULPI_DEBUG_LINESTATE0 (1 << 0)
287#define ULPI_DEBUG_LINESTATE1 (1 << 1)
288
289/* Carkit Control */
290#define ULPI_CARKIT_CTRL_CARKITPWR (1 << 0)
291#define ULPI_CARKIT_CTRL_IDGNDDRV (1 << 1)
292#define ULPI_CARKIT_CTRL_TXDEN (1 << 2)
293#define ULPI_CARKIT_CTRL_RXDEN (1 << 3)
294#define ULPI_CARKIT_CTRL_SPKLEFTEN (1 << 4)
295#define ULPI_CARKIT_CTRL_SPKRIGHTEN (1 << 5)
296#define ULPI_CARKIT_CTRL_MICEN (1 << 6)
297
298/* Carkit Interrupt Enable */
299#define ULPI_CARKIT_INT_EN_IDFLOAT_RISE (1 << 0)
300#define ULPI_CARKIT_INT_EN_IDFLOAT_FALL (1 << 1)
301#define ULPI_CARKIT_INT_EN_CARINTDET (1 << 2)
302#define ULPI_CARKIT_INT_EN_DP_RISE (1 << 3)
303#define ULPI_CARKIT_INT_EN_DP_FALL (1 << 4)
304
305/* Carkit Interrupt Status and Latch */
306#define ULPI_CARKIT_INT_IDFLOAT (1 << 0)
307#define ULPI_CARKIT_INT_CARINTDET (1 << 1)
308#define ULPI_CARKIT_INT_DP (1 << 2)
309
310/* Carkit Pulse Control*/
311#define ULPI_CARKIT_PLS_CTRL_TXPLSEN (1 << 0)
312#define ULPI_CARKIT_PLS_CTRL_RXPLSEN (1 << 1)
313#define ULPI_CARKIT_PLS_CTRL_SPKRLEFT_BIASEN (1 << 2)
314#define ULPI_CARKIT_PLS_CTRL_SPKRRIGHT_BIASEN (1 << 3)
315
316
317#endif /* __USB_ULPI_H__ */