blob: 5f993b99052360b406860bc2098b67e68cfeb57c [file] [log] [blame]
Heiko Schocher4ce5a722009-07-20 09:59:37 +02001/*
Albert Aribaud306563a2010-08-27 18:26:05 +02002 * Driver for the TWSI (i2c) controller found on the Marvell
3 * orion5x and kirkwood SoC families.
Heiko Schocher4ce5a722009-07-20 09:59:37 +02004 *
Albert ARIBAUD57b4bce2011-04-22 19:41:02 +02005 * Author: Albert Aribaud <albert.u.boot@aribaud.net>
Albert Aribaud306563a2010-08-27 18:26:05 +02006 * Copyright (c) 2010 Albert Aribaud.
Heiko Schocher4ce5a722009-07-20 09:59:37 +02007 *
Wolfgang Denk1a459662013-07-08 09:37:19 +02008 * SPDX-License-Identifier: GPL-2.0+
Heiko Schocher4ce5a722009-07-20 09:59:37 +02009 */
Albert Aribaud306563a2010-08-27 18:26:05 +020010
Heiko Schocher4ce5a722009-07-20 09:59:37 +020011#include <common.h>
12#include <i2c.h>
Heiko Schocher4ce5a722009-07-20 09:59:37 +020013#include <asm/errno.h>
14#include <asm/io.h>
15
Heiko Schocher4ce5a722009-07-20 09:59:37 +020016/*
Paul Kocialkowskidd822422015-04-10 23:09:51 +020017 * include a file that will provide CONFIG_I2C_MVTWSI_BASE*
Albert Aribaud306563a2010-08-27 18:26:05 +020018 * and possibly other settings
Heiko Schocher4ce5a722009-07-20 09:59:37 +020019 */
20
Albert Aribaud306563a2010-08-27 18:26:05 +020021#if defined(CONFIG_ORION5X)
22#include <asm/arch/orion5x.h>
Stefan Roese81e33f42015-12-21 13:56:33 +010023#elif (defined(CONFIG_KIRKWOOD) || defined(CONFIG_ARCH_MVEBU))
Stefan Roese3dc23f72014-10-22 12:13:06 +020024#include <asm/arch/soc.h>
Hans de Goede66203772014-06-13 22:55:49 +020025#elif defined(CONFIG_SUNXI)
26#include <asm/arch/i2c.h>
Albert Aribaud306563a2010-08-27 18:26:05 +020027#else
28#error Driver mvtwsi not supported by SoC or board
29#endif
30
31/*
32 * TWSI register structure
33 */
34
Hans de Goede66203772014-06-13 22:55:49 +020035#ifdef CONFIG_SUNXI
36
37struct mvtwsi_registers {
38 u32 slave_address;
39 u32 xtnd_slave_addr;
40 u32 data;
41 u32 control;
42 u32 status;
43 u32 baudrate;
44 u32 soft_reset;
45};
46
47#else
48
Albert Aribaud306563a2010-08-27 18:26:05 +020049struct mvtwsi_registers {
50 u32 slave_address;
51 u32 data;
52 u32 control;
53 union {
54 u32 status; /* when reading */
55 u32 baudrate; /* when writing */
56 };
57 u32 xtnd_slave_addr;
58 u32 reserved[2];
59 u32 soft_reset;
60};
61
Hans de Goede66203772014-06-13 22:55:49 +020062#endif
63
Albert Aribaud306563a2010-08-27 18:26:05 +020064/*
65 * Control register fields
66 */
67
68#define MVTWSI_CONTROL_ACK 0x00000004
69#define MVTWSI_CONTROL_IFLG 0x00000008
70#define MVTWSI_CONTROL_STOP 0x00000010
71#define MVTWSI_CONTROL_START 0x00000020
72#define MVTWSI_CONTROL_TWSIEN 0x00000040
73#define MVTWSI_CONTROL_INTEN 0x00000080
74
75/*
Hans de Goede904dfbf2016-01-14 14:06:25 +010076 * On sun6i and newer IFLG is a write-clear bit which is cleared by writing 1,
77 * on other platforms it is a normal r/w bit which is cleared by writing 0.
78 */
79
80#ifdef CONFIG_SUNXI_GEN_SUN6I
81#define MVTWSI_CONTROL_CLEAR_IFLG 0x00000008
82#else
83#define MVTWSI_CONTROL_CLEAR_IFLG 0x00000000
84#endif
85
86/*
Albert Aribaud306563a2010-08-27 18:26:05 +020087 * Status register values -- only those expected in normal master
88 * operation on non-10-bit-address devices; whatever status we don't
89 * expect in nominal conditions (bus errors, arbitration losses,
90 * missing ACKs...) we just pass back to the caller as an error
91 * code.
92 */
93
94#define MVTWSI_STATUS_START 0x08
95#define MVTWSI_STATUS_REPEATED_START 0x10
96#define MVTWSI_STATUS_ADDR_W_ACK 0x18
97#define MVTWSI_STATUS_DATA_W_ACK 0x28
98#define MVTWSI_STATUS_ADDR_R_ACK 0x40
99#define MVTWSI_STATUS_ADDR_R_NAK 0x48
100#define MVTWSI_STATUS_DATA_R_ACK 0x50
101#define MVTWSI_STATUS_DATA_R_NAK 0x58
102#define MVTWSI_STATUS_IDLE 0xF8
103
104/*
Paul Kocialkowskidd822422015-04-10 23:09:51 +0200105 * MVTWSI controller base
Albert Aribaud306563a2010-08-27 18:26:05 +0200106 */
107
Paul Kocialkowskidd822422015-04-10 23:09:51 +0200108static struct mvtwsi_registers *twsi_get_base(struct i2c_adapter *adap)
109{
110 switch (adap->hwadapnr) {
111#ifdef CONFIG_I2C_MVTWSI_BASE0
112 case 0:
113 return (struct mvtwsi_registers *) CONFIG_I2C_MVTWSI_BASE0;
114#endif
115#ifdef CONFIG_I2C_MVTWSI_BASE1
116 case 1:
117 return (struct mvtwsi_registers *) CONFIG_I2C_MVTWSI_BASE1;
118#endif
119#ifdef CONFIG_I2C_MVTWSI_BASE2
120 case 2:
121 return (struct mvtwsi_registers *) CONFIG_I2C_MVTWSI_BASE2;
122#endif
123#ifdef CONFIG_I2C_MVTWSI_BASE3
124 case 3:
125 return (struct mvtwsi_registers *) CONFIG_I2C_MVTWSI_BASE3;
126#endif
127#ifdef CONFIG_I2C_MVTWSI_BASE4
128 case 4:
129 return (struct mvtwsi_registers *) CONFIG_I2C_MVTWSI_BASE4;
130#endif
Jelle van der Waa9d082682016-01-14 14:06:26 +0100131#ifdef CONFIG_I2C_MVTWSI_BASE5
132 case 5:
133 return (struct mvtwsi_registers *) CONFIG_I2C_MVTWSI_BASE5;
134#endif
Paul Kocialkowskidd822422015-04-10 23:09:51 +0200135 default:
136 printf("Missing mvtwsi controller %d base\n", adap->hwadapnr);
137 break;
138 }
139
140 return NULL;
141}
Albert Aribaud306563a2010-08-27 18:26:05 +0200142
143/*
144 * Returned statuses are 0 for success and nonzero otherwise.
145 * Currently, cmd_i2c and cmd_eeprom do not interpret an error status.
146 * Thus to ease debugging, the return status contains some debug info:
147 * - bits 31..24 are error class: 1 is timeout, 2 is 'status mismatch'.
148 * - bits 23..16 are the last value of the control register.
149 * - bits 15..8 are the last value of the status register.
150 * - bits 7..0 are the expected value of the status register.
151 */
152
153#define MVTWSI_ERROR_WRONG_STATUS 0x01
154#define MVTWSI_ERROR_TIMEOUT 0x02
155
156#define MVTWSI_ERROR(ec, lc, ls, es) (((ec << 24) & 0xFF000000) | \
157 ((lc << 16) & 0x00FF0000) | ((ls<<8) & 0x0000FF00) | (es & 0xFF))
158
159/*
160 * Wait for IFLG to raise, or return 'timeout'; then if status is as expected,
161 * return 0 (ok) or return 'wrong status'.
162 */
Paul Kocialkowskidd822422015-04-10 23:09:51 +0200163static int twsi_wait(struct i2c_adapter *adap, int expected_status)
Heiko Schocher4ce5a722009-07-20 09:59:37 +0200164{
Paul Kocialkowskidd822422015-04-10 23:09:51 +0200165 struct mvtwsi_registers *twsi = twsi_get_base(adap);
Albert Aribaud306563a2010-08-27 18:26:05 +0200166 int control, status;
167 int timeout = 1000;
168
169 do {
170 control = readl(&twsi->control);
171 if (control & MVTWSI_CONTROL_IFLG) {
172 status = readl(&twsi->status);
173 if (status == expected_status)
174 return 0;
175 else
176 return MVTWSI_ERROR(
177 MVTWSI_ERROR_WRONG_STATUS,
178 control, status, expected_status);
179 }
180 udelay(10); /* one clock cycle at 100 kHz */
181 } while (timeout--);
182 status = readl(&twsi->status);
183 return MVTWSI_ERROR(
184 MVTWSI_ERROR_TIMEOUT, control, status, expected_status);
Heiko Schocher4ce5a722009-07-20 09:59:37 +0200185}
186
Albert Aribaud306563a2010-08-27 18:26:05 +0200187/*
188 * These flags are ORed to any write to the control register
189 * They allow global setting of TWSIEN and ACK.
190 * By default none are set.
191 * twsi_start() sets TWSIEN (in case the controller was disabled)
192 * twsi_recv() sets ACK or resets it depending on expected status.
193 */
194static u8 twsi_control_flags = MVTWSI_CONTROL_TWSIEN;
Heiko Schocher4ce5a722009-07-20 09:59:37 +0200195
Albert Aribaud306563a2010-08-27 18:26:05 +0200196/*
197 * Assert the START condition, either in a single I2C transaction
198 * or inside back-to-back ones (repeated starts).
199 */
Paul Kocialkowskidd822422015-04-10 23:09:51 +0200200static int twsi_start(struct i2c_adapter *adap, int expected_status)
Albert Aribaud306563a2010-08-27 18:26:05 +0200201{
Paul Kocialkowskidd822422015-04-10 23:09:51 +0200202 struct mvtwsi_registers *twsi = twsi_get_base(adap);
203
Albert Aribaud306563a2010-08-27 18:26:05 +0200204 /* globally set TWSIEN in case it was not */
205 twsi_control_flags |= MVTWSI_CONTROL_TWSIEN;
206 /* assert START */
Hans de Goede904dfbf2016-01-14 14:06:25 +0100207 twsi_control_flags |= MVTWSI_CONTROL_START | MVTWSI_CONTROL_CLEAR_IFLG;
208 writel(twsi_control_flags, &twsi->control);
Albert Aribaud306563a2010-08-27 18:26:05 +0200209 /* wait for controller to process START */
Paul Kocialkowskidd822422015-04-10 23:09:51 +0200210 return twsi_wait(adap, expected_status);
Albert Aribaud306563a2010-08-27 18:26:05 +0200211}
212
213/*
214 * Send a byte (i2c address or data).
215 */
Paul Kocialkowskidd822422015-04-10 23:09:51 +0200216static int twsi_send(struct i2c_adapter *adap, u8 byte, int expected_status)
Albert Aribaud306563a2010-08-27 18:26:05 +0200217{
Paul Kocialkowskidd822422015-04-10 23:09:51 +0200218 struct mvtwsi_registers *twsi = twsi_get_base(adap);
219
Albert Aribaud306563a2010-08-27 18:26:05 +0200220 /* put byte in data register for sending */
221 writel(byte, &twsi->data);
222 /* clear any pending interrupt -- that'll cause sending */
Hans de Goede904dfbf2016-01-14 14:06:25 +0100223 writel(twsi_control_flags | MVTWSI_CONTROL_CLEAR_IFLG, &twsi->control);
Albert Aribaud306563a2010-08-27 18:26:05 +0200224 /* wait for controller to receive byte and check ACK */
Paul Kocialkowskidd822422015-04-10 23:09:51 +0200225 return twsi_wait(adap, expected_status);
Albert Aribaud306563a2010-08-27 18:26:05 +0200226}
227
228/*
229 * Receive a byte.
230 * Global mvtwsi_control_flags variable says if we should ack or nak.
231 */
Paul Kocialkowskidd822422015-04-10 23:09:51 +0200232static int twsi_recv(struct i2c_adapter *adap, u8 *byte)
Albert Aribaud306563a2010-08-27 18:26:05 +0200233{
Paul Kocialkowskidd822422015-04-10 23:09:51 +0200234 struct mvtwsi_registers *twsi = twsi_get_base(adap);
Albert Aribaud306563a2010-08-27 18:26:05 +0200235 int expected_status, status;
236
237 /* compute expected status based on ACK bit in global control flags */
238 if (twsi_control_flags & MVTWSI_CONTROL_ACK)
239 expected_status = MVTWSI_STATUS_DATA_R_ACK;
240 else
241 expected_status = MVTWSI_STATUS_DATA_R_NAK;
242 /* acknowledge *previous state* and launch receive */
Hans de Goede904dfbf2016-01-14 14:06:25 +0100243 writel(twsi_control_flags | MVTWSI_CONTROL_CLEAR_IFLG, &twsi->control);
Albert Aribaud306563a2010-08-27 18:26:05 +0200244 /* wait for controller to receive byte and assert ACK or NAK */
Paul Kocialkowskidd822422015-04-10 23:09:51 +0200245 status = twsi_wait(adap, expected_status);
Albert Aribaud306563a2010-08-27 18:26:05 +0200246 /* if we did receive expected byte then store it */
247 if (status == 0)
248 *byte = readl(&twsi->data);
249 /* return status */
250 return status;
251}
252
253/*
254 * Assert the STOP condition.
255 * This is also used to force the bus back in idle (SDA=SCL=1).
256 */
Paul Kocialkowskidd822422015-04-10 23:09:51 +0200257static int twsi_stop(struct i2c_adapter *adap, int status)
Albert Aribaud306563a2010-08-27 18:26:05 +0200258{
Paul Kocialkowskidd822422015-04-10 23:09:51 +0200259 struct mvtwsi_registers *twsi = twsi_get_base(adap);
Albert Aribaud306563a2010-08-27 18:26:05 +0200260 int control, stop_status;
261 int timeout = 1000;
262
263 /* assert STOP */
264 control = MVTWSI_CONTROL_TWSIEN | MVTWSI_CONTROL_STOP;
Hans de Goede904dfbf2016-01-14 14:06:25 +0100265 writel(control | MVTWSI_CONTROL_CLEAR_IFLG, &twsi->control);
Albert Aribaud306563a2010-08-27 18:26:05 +0200266 /* wait for IDLE; IFLG won't rise so twsi_wait() is no use. */
267 do {
268 stop_status = readl(&twsi->status);
269 if (stop_status == MVTWSI_STATUS_IDLE)
270 break;
271 udelay(10); /* one clock cycle at 100 kHz */
272 } while (timeout--);
273 control = readl(&twsi->control);
274 if (stop_status != MVTWSI_STATUS_IDLE)
275 if (status == 0)
276 status = MVTWSI_ERROR(
277 MVTWSI_ERROR_TIMEOUT,
278 control, status, MVTWSI_STATUS_IDLE);
279 return status;
280}
281
Stefan Roesef582a152015-03-18 09:30:54 +0100282static unsigned int twsi_calc_freq(const int n, const int m)
283{
284#ifdef CONFIG_SUNXI
285 return CONFIG_SYS_TCLK / (10 * (m + 1) * (1 << n));
286#else
287 return CONFIG_SYS_TCLK / (10 * (m + 1) * (2 << n));
288#endif
289}
Albert Aribaud306563a2010-08-27 18:26:05 +0200290
291/*
Albert Aribaud306563a2010-08-27 18:26:05 +0200292 * Reset controller.
Albert Aribaud306563a2010-08-27 18:26:05 +0200293 * Controller reset also resets the baud rate and slave address, so
Hans de Goede0db2bbd2014-06-13 22:55:48 +0200294 * they must be re-established afterwards.
Albert Aribaud306563a2010-08-27 18:26:05 +0200295 */
Hans de Goede0db2bbd2014-06-13 22:55:48 +0200296static void twsi_reset(struct i2c_adapter *adap)
Albert Aribaud306563a2010-08-27 18:26:05 +0200297{
Paul Kocialkowskidd822422015-04-10 23:09:51 +0200298 struct mvtwsi_registers *twsi = twsi_get_base(adap);
Albert Aribaud306563a2010-08-27 18:26:05 +0200299 /* ensure controller will be enabled by any twsi*() function */
300 twsi_control_flags = MVTWSI_CONTROL_TWSIEN;
301 /* reset controller */
302 writel(0, &twsi->soft_reset);
303 /* wait 2 ms -- this is what the Marvell LSP does */
304 udelay(20000);
Albert Aribaud306563a2010-08-27 18:26:05 +0200305}
306
307/*
308 * I2C init called by cmd_i2c when doing 'i2c reset'.
309 * Sets baud to the highest possible value not exceeding requested one.
310 */
Hans de Goede0db2bbd2014-06-13 22:55:48 +0200311static unsigned int twsi_i2c_set_bus_speed(struct i2c_adapter *adap,
312 unsigned int requested_speed)
Albert Aribaud306563a2010-08-27 18:26:05 +0200313{
Paul Kocialkowskidd822422015-04-10 23:09:51 +0200314 struct mvtwsi_registers *twsi = twsi_get_base(adap);
Hans de Goede0db2bbd2014-06-13 22:55:48 +0200315 unsigned int tmp_speed, highest_speed, n, m;
316 unsigned int baud = 0x44; /* baudrate at controller reset */
Albert Aribaud306563a2010-08-27 18:26:05 +0200317
318 /* use actual speed to collect progressively higher values */
319 highest_speed = 0;
320 /* compute m, n setting for highest speed not above requested speed */
Heiko Schocher4ce5a722009-07-20 09:59:37 +0200321 for (n = 0; n < 8; n++) {
322 for (m = 0; m < 16; m++) {
Stefan Roesef582a152015-03-18 09:30:54 +0100323 tmp_speed = twsi_calc_freq(n, m);
Albert Aribaud306563a2010-08-27 18:26:05 +0200324 if ((tmp_speed <= requested_speed)
325 && (tmp_speed > highest_speed)) {
326 highest_speed = tmp_speed;
327 baud = (m << 3) | n;
Heiko Schocher4ce5a722009-07-20 09:59:37 +0200328 }
329 }
330 }
Hans de Goede0db2bbd2014-06-13 22:55:48 +0200331 writel(baud, &twsi->baudrate);
332 return 0;
333}
334
335static void twsi_i2c_init(struct i2c_adapter *adap, int speed, int slaveadd)
336{
Paul Kocialkowskidd822422015-04-10 23:09:51 +0200337 struct mvtwsi_registers *twsi = twsi_get_base(adap);
338
Albert Aribaud306563a2010-08-27 18:26:05 +0200339 /* reset controller */
Hans de Goede0db2bbd2014-06-13 22:55:48 +0200340 twsi_reset(adap);
341 /* set speed */
342 twsi_i2c_set_bus_speed(adap, speed);
343 /* set slave address even though we don't use it */
344 writel(slaveadd, &twsi->slave_address);
345 writel(0, &twsi->xtnd_slave_addr);
346 /* assert STOP but don't care for the result */
Paul Kocialkowskidd822422015-04-10 23:09:51 +0200347 (void) twsi_stop(adap, 0);
Heiko Schocher4ce5a722009-07-20 09:59:37 +0200348}
349
Albert Aribaud306563a2010-08-27 18:26:05 +0200350/*
351 * Begin I2C transaction with expected start status, at given address.
352 * Common to i2c_probe, i2c_read and i2c_write.
353 * Expected address status will derive from direction bit (bit 0) in addr.
354 */
Paul Kocialkowskidd822422015-04-10 23:09:51 +0200355static int i2c_begin(struct i2c_adapter *adap, int expected_start_status,
356 u8 addr)
Heiko Schocher4ce5a722009-07-20 09:59:37 +0200357{
Albert Aribaud306563a2010-08-27 18:26:05 +0200358 int status, expected_addr_status;
Heiko Schocher4ce5a722009-07-20 09:59:37 +0200359
Albert Aribaud306563a2010-08-27 18:26:05 +0200360 /* compute expected address status from direction bit in addr */
361 if (addr & 1) /* reading */
362 expected_addr_status = MVTWSI_STATUS_ADDR_R_ACK;
363 else /* writing */
364 expected_addr_status = MVTWSI_STATUS_ADDR_W_ACK;
365 /* assert START */
Paul Kocialkowskidd822422015-04-10 23:09:51 +0200366 status = twsi_start(adap, expected_start_status);
Albert Aribaud306563a2010-08-27 18:26:05 +0200367 /* send out the address if the start went well */
368 if (status == 0)
Paul Kocialkowskidd822422015-04-10 23:09:51 +0200369 status = twsi_send(adap, addr, expected_addr_status);
Albert Aribaud306563a2010-08-27 18:26:05 +0200370 /* return ok or status of first failure to caller */
371 return status;
Heiko Schocher4ce5a722009-07-20 09:59:37 +0200372}
373
Albert Aribaud306563a2010-08-27 18:26:05 +0200374/*
375 * I2C probe called by cmd_i2c when doing 'i2c probe'.
376 * Begin read, nak data byte, end.
377 */
Hans de Goede0db2bbd2014-06-13 22:55:48 +0200378static int twsi_i2c_probe(struct i2c_adapter *adap, uchar chip)
Heiko Schocher4ce5a722009-07-20 09:59:37 +0200379{
Albert Aribaud306563a2010-08-27 18:26:05 +0200380 u8 dummy_byte;
381 int status;
382
383 /* begin i2c read */
Paul Kocialkowskidd822422015-04-10 23:09:51 +0200384 status = i2c_begin(adap, MVTWSI_STATUS_START, (chip << 1) | 1);
Albert Aribaud306563a2010-08-27 18:26:05 +0200385 /* dummy read was accepted: receive byte but NAK it. */
386 if (status == 0)
Paul Kocialkowskidd822422015-04-10 23:09:51 +0200387 status = twsi_recv(adap, &dummy_byte);
Albert Aribaud306563a2010-08-27 18:26:05 +0200388 /* Stop transaction */
Paul Kocialkowskidd822422015-04-10 23:09:51 +0200389 twsi_stop(adap, 0);
Albert Aribaud306563a2010-08-27 18:26:05 +0200390 /* return 0 or status of first failure */
391 return status;
392}
393
394/*
395 * I2C read called by cmd_i2c when doing 'i2c read' and by cmd_eeprom.c
396 * Begin write, send address byte(s), begin read, receive data bytes, end.
397 *
398 * NOTE: some EEPROMS want a stop right before the second start, while
399 * some will choke if it is there. Deciding which we should do is eeprom
400 * stuff, not i2c, but at the moment the APIs won't let us put it in
401 * cmd_eeprom, so we have to choose here, and for the moment that'll be
402 * a repeated start without a preceding stop.
403 */
Hans de Goede0db2bbd2014-06-13 22:55:48 +0200404static int twsi_i2c_read(struct i2c_adapter *adap, uchar chip, uint addr,
405 int alen, uchar *data, int length)
Albert Aribaud306563a2010-08-27 18:26:05 +0200406{
407 int status;
408
409 /* begin i2c write to send the address bytes */
Paul Kocialkowskidd822422015-04-10 23:09:51 +0200410 status = i2c_begin(adap, MVTWSI_STATUS_START, (chip << 1));
Albert Aribaud306563a2010-08-27 18:26:05 +0200411 /* send addr bytes */
412 while ((status == 0) && alen--)
Paul Kocialkowskidd822422015-04-10 23:09:51 +0200413 status = twsi_send(adap, addr >> (8*alen),
Albert Aribaud306563a2010-08-27 18:26:05 +0200414 MVTWSI_STATUS_DATA_W_ACK);
415 /* begin i2c read to receive eeprom data bytes */
416 if (status == 0)
Paul Kocialkowskidd822422015-04-10 23:09:51 +0200417 status = i2c_begin(adap, MVTWSI_STATUS_REPEATED_START,
418 (chip << 1) | 1);
Albert Aribaud306563a2010-08-27 18:26:05 +0200419 /* prepare ACK if at least one byte must be received */
420 if (length > 0)
421 twsi_control_flags |= MVTWSI_CONTROL_ACK;
422 /* now receive actual bytes */
423 while ((status == 0) && length--) {
424 /* reset NAK if we if no more to read now */
425 if (length == 0)
426 twsi_control_flags &= ~MVTWSI_CONTROL_ACK;
427 /* read current byte */
Paul Kocialkowskidd822422015-04-10 23:09:51 +0200428 status = twsi_recv(adap, data++);
Heiko Schocher4ce5a722009-07-20 09:59:37 +0200429 }
Albert Aribaud306563a2010-08-27 18:26:05 +0200430 /* Stop transaction */
Paul Kocialkowskidd822422015-04-10 23:09:51 +0200431 status = twsi_stop(adap, status);
Albert Aribaud306563a2010-08-27 18:26:05 +0200432 /* return 0 or status of first failure */
433 return status;
Heiko Schocher4ce5a722009-07-20 09:59:37 +0200434}
435
Albert Aribaud306563a2010-08-27 18:26:05 +0200436/*
437 * I2C write called by cmd_i2c when doing 'i2c write' and by cmd_eeprom.c
438 * Begin write, send address byte(s), send data bytes, end.
439 */
Hans de Goede0db2bbd2014-06-13 22:55:48 +0200440static int twsi_i2c_write(struct i2c_adapter *adap, uchar chip, uint addr,
441 int alen, uchar *data, int length)
Heiko Schocher4ce5a722009-07-20 09:59:37 +0200442{
Albert Aribaud306563a2010-08-27 18:26:05 +0200443 int status;
Heiko Schocher4ce5a722009-07-20 09:59:37 +0200444
Albert Aribaud306563a2010-08-27 18:26:05 +0200445 /* begin i2c write to send the eeprom adress bytes then data bytes */
Paul Kocialkowskidd822422015-04-10 23:09:51 +0200446 status = i2c_begin(adap, MVTWSI_STATUS_START, (chip << 1));
Albert Aribaud306563a2010-08-27 18:26:05 +0200447 /* send addr bytes */
448 while ((status == 0) && alen--)
Paul Kocialkowskidd822422015-04-10 23:09:51 +0200449 status = twsi_send(adap, addr >> (8*alen),
Albert Aribaud306563a2010-08-27 18:26:05 +0200450 MVTWSI_STATUS_DATA_W_ACK);
451 /* send data bytes */
452 while ((status == 0) && (length-- > 0))
Paul Kocialkowskidd822422015-04-10 23:09:51 +0200453 status = twsi_send(adap, *(data++), MVTWSI_STATUS_DATA_W_ACK);
Albert Aribaud306563a2010-08-27 18:26:05 +0200454 /* Stop transaction */
Paul Kocialkowskidd822422015-04-10 23:09:51 +0200455 status = twsi_stop(adap, status);
Albert Aribaud306563a2010-08-27 18:26:05 +0200456 /* return 0 or status of first failure */
457 return status;
Heiko Schocher4ce5a722009-07-20 09:59:37 +0200458}
459
Paul Kocialkowskidd822422015-04-10 23:09:51 +0200460#ifdef CONFIG_I2C_MVTWSI_BASE0
Hans de Goede0db2bbd2014-06-13 22:55:48 +0200461U_BOOT_I2C_ADAP_COMPLETE(twsi0, twsi_i2c_init, twsi_i2c_probe,
462 twsi_i2c_read, twsi_i2c_write,
463 twsi_i2c_set_bus_speed,
464 CONFIG_SYS_I2C_SPEED, CONFIG_SYS_I2C_SLAVE, 0)
Paul Kocialkowskidd822422015-04-10 23:09:51 +0200465#endif
466#ifdef CONFIG_I2C_MVTWSI_BASE1
467U_BOOT_I2C_ADAP_COMPLETE(twsi1, twsi_i2c_init, twsi_i2c_probe,
468 twsi_i2c_read, twsi_i2c_write,
469 twsi_i2c_set_bus_speed,
470 CONFIG_SYS_I2C_SPEED, CONFIG_SYS_I2C_SLAVE, 1)
471
472#endif
473#ifdef CONFIG_I2C_MVTWSI_BASE2
474U_BOOT_I2C_ADAP_COMPLETE(twsi2, twsi_i2c_init, twsi_i2c_probe,
475 twsi_i2c_read, twsi_i2c_write,
476 twsi_i2c_set_bus_speed,
477 CONFIG_SYS_I2C_SPEED, CONFIG_SYS_I2C_SLAVE, 2)
478
479#endif
480#ifdef CONFIG_I2C_MVTWSI_BASE3
481U_BOOT_I2C_ADAP_COMPLETE(twsi3, twsi_i2c_init, twsi_i2c_probe,
482 twsi_i2c_read, twsi_i2c_write,
483 twsi_i2c_set_bus_speed,
484 CONFIG_SYS_I2C_SPEED, CONFIG_SYS_I2C_SLAVE, 3)
485
486#endif
487#ifdef CONFIG_I2C_MVTWSI_BASE4
488U_BOOT_I2C_ADAP_COMPLETE(twsi4, twsi_i2c_init, twsi_i2c_probe,
489 twsi_i2c_read, twsi_i2c_write,
490 twsi_i2c_set_bus_speed,
491 CONFIG_SYS_I2C_SPEED, CONFIG_SYS_I2C_SLAVE, 4)
492
493#endif
Jelle van der Waa9d082682016-01-14 14:06:26 +0100494#ifdef CONFIG_I2C_MVTWSI_BASE5
495U_BOOT_I2C_ADAP_COMPLETE(twsi5, twsi_i2c_init, twsi_i2c_probe,
496 twsi_i2c_read, twsi_i2c_write,
497 twsi_i2c_set_bus_speed,
498 CONFIG_SYS_I2C_SPEED, CONFIG_SYS_I2C_SLAVE, 5)
499
500#endif