1/*-
2 * Copyright (c) 2003-2009 RMI Corporation
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 * 3. Neither the name of RMI Corporation, nor the names of its contributors,
14 * may be used to endorse or promote products derived from this software
15 * without specific prior written permission.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27 * SUCH DAMAGE.
28 *
29 * RMI_BSD */
30
31#include <sys/cdefs.h>
| 1/*-
2 * Copyright (c) 2003-2009 RMI Corporation
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 * 3. Neither the name of RMI Corporation, nor the names of its contributors,
14 * may be used to endorse or promote products derived from this software
15 * without specific prior written permission.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27 * SUCH DAMAGE.
28 *
29 * RMI_BSD */
30
31#include <sys/cdefs.h>
|
32__FBSDID("$FreeBSD: head/sys/mips/rmi/xlr_i2c.c 216390 2010-12-12 06:00:26Z jchandra $");
| 32__FBSDID("$FreeBSD: head/sys/mips/rmi/xlr_i2c.c 241844 2012-10-22 03:00:37Z eadler $");
|
33
34/*
35 * I2C driver for the Palm-BK3220 I2C Host adapter on the RMI XLR.
36 */
37
38#include <sys/param.h>
39#include <sys/systm.h>
40#include <sys/kernel.h>
41#include <sys/lock.h>
42#include <sys/module.h>
43#include <sys/mutex.h>
44#include <sys/bus.h>
45#include <sys/rman.h>
46
47
48#include <dev/iicbus/iiconf.h>
49#include <dev/iicbus/iicbus.h>
50
51#include <mips/rmi/board.h>
52#include <mips/rmi/iomap.h>
53#include <mips/include/resource.h>
54
55#include "iicbus_if.h"
56
57/* XLR I2C REGISTERS */
58#define XLR_I2C_CFG 0x00
59#define XLR_I2C_CLKDIV 0x01
60#define XLR_I2C_DEVADDR 0x02
61#define XLR_I2C_ADDR 0x03
62#define XLR_I2C_DATAOUT 0x04
63#define XLR_I2C_DATAIN 0x05
64#define XLR_I2C_STATUS 0x06
65#define XLR_I2C_STARTXFR 0x07
66#define XLR_I2C_BYTECNT 0x08
67#define XLR_I2C_HDSTATIM 0x09
68
69/* XLR I2C REGISTERS FLAGS */
70#define XLR_I2C_BUS_BUSY 0x01
71#define XLR_I2C_SDOEMPTY 0x02
72#define XLR_I2C_RXRDY 0x04
73#define XLR_I2C_ACK_ERR 0x08
74#define XLR_I2C_ARB_STARTERR 0x30
75
76/* Register Programming Values!! Change as required */
77#define XLR_I2C_CFG_ADDR 0xF8 /* 8-Bit dev Addr + POR Values */
78#define XLR_I2C_CFG_NOADDR 0xFA /* 8-Bit reg Addr + POR Values : No dev addr */
79#define XLR_I2C_STARTXFR_ND 0x02 /* No data , only addr */
80#define XLR_I2C_STARTXFR_RD 0x01 /* Read */
81#define XLR_I2C_STARTXFR_WR 0x00 /* Write */
82#define XLR_I2C_CLKDIV_DEF 0x14A /* 0x00000052 */
83#define XLR_I2C_HDSTATIM_DEF 0x107 /* 0x00000000 */
84
85#define MAXTIME 0x10000
86#define ARIZONA_I2C_BUS 1
87
88static devclass_t xlr_i2c_devclass;
89
90/*
91 * Device methods
92 */
93static int xlr_i2c_probe(device_t);
94static int xlr_i2c_attach(device_t);
95static int xlr_i2c_detach(device_t);
96
97static int xlr_i2c_start(device_t dev, u_char slave, int timeout);
98static int xlr_i2c_stop(device_t dev);
99static int xlr_i2c_read(device_t dev, char *buf, int len, int *read, int last, int delay);
100static int xlr_i2c_write(device_t dev, const char *buf, int len, int *sent, int timeout);
101static int xlr_i2c_callback(device_t dev, int index, caddr_t data);
102static int xlr_i2c_repeated_start(device_t dev, u_char slave, int timeout);
103static int xlr_i2c_transfer(device_t bus, struct iic_msg *msgs, uint32_t nmsgs);
104
105struct xlr_i2c_softc {
106 device_t dev; /* Self */
107 struct resource *mem_res; /* Memory resource */
108 volatile int flags;
109 int sc_started;
110 uint8_t i2cdev_addr;
111 xlr_reg_t *iobase_i2c_regs;
112 device_t iicbus;
113 struct mtx sc_mtx;
114};
115
116static void
117set_i2c_base(device_t dev)
118{
119 struct xlr_i2c_softc *sc;
120
121 sc = device_get_softc(dev);
122 if (device_get_unit(dev) == 0)
123 sc->iobase_i2c_regs = xlr_io_mmio(XLR_IO_I2C_0_OFFSET);
124 else
125 sc->iobase_i2c_regs = xlr_io_mmio(XLR_IO_I2C_1_OFFSET);
126}
127
128static void
129xlr_i2c_dev_write(device_t dev, int reg, int value)
130{
131 struct xlr_i2c_softc *sc;
132
133 sc = device_get_softc(dev);
134 xlr_write_reg(sc->iobase_i2c_regs, reg, value);
135 return;
136}
137
138
139static int
140xlr_i2c_dev_read(device_t dev, int reg)
141{
142 uint32_t val;
143 struct xlr_i2c_softc *sc;
144
145 sc = device_get_softc(dev);
146 val = xlr_read_reg(sc->iobase_i2c_regs, reg);
147 return ((int)val);
148}
149
150
151static int
152xlr_i2c_probe(device_t dev)
153{
154 device_set_desc(dev, "XLR/XLS I2C bus controller");
155
156 return (0);
157}
158
159
160/*
161 * We add all the devices which we know about.
162 * The generic attach routine will attach them if they are alive.
163 */
164static int
165xlr_i2c_attach(device_t dev)
166{
167 int rid;
168 struct xlr_i2c_softc *sc;
169 device_t tmpd;
170
171 if(device_get_unit(dev)!=ARIZONA_I2C_BUS) {
172 device_printf(dev, "unused iicbus instance\n");
173 return 0;
174 }
175
176 sc = device_get_softc(dev);
177 set_i2c_base(dev);
178
179 mtx_init(&sc->sc_mtx, "xlr_i2c", "xlr_i2c", MTX_DEF);
180
181 sc->mem_res = bus_alloc_resource_any(dev, SYS_RES_MEMORY, &rid, RF_ACTIVE);
182 if (sc->mem_res == NULL) {
183 printf("not able to allocate the bus resource\n");
184 }
185 if ((sc->iicbus = device_add_child(dev, "iicbus", -1)) == NULL) {
186 printf("could not allocate iicbus instance\n");
187 return -1;
188 }
189 if(xlr_board_info.xlr_i2c_device[I2C_RTC].enabled == 1) {
190 tmpd = device_add_child(sc->iicbus, "ds1374u", 0);
191 device_set_ivars(tmpd, &xlr_board_info.xlr_i2c_device[I2C_RTC]);
192 }
193 if(xlr_board_info.xlr_i2c_device[I2C_THERMAL].enabled == 1) {
194 tmpd = device_add_child(sc->iicbus, "max6657", 0);
195 device_set_ivars(tmpd, &xlr_board_info.xlr_i2c_device[I2C_THERMAL]);
196 }
197 if(xlr_board_info.xlr_i2c_device[I2C_EEPROM].enabled == 1) {
198 tmpd = device_add_child(sc->iicbus, "at24co2n", 0);
199 device_set_ivars(tmpd, &xlr_board_info.xlr_i2c_device[I2C_EEPROM]);
200 }
201
202 bus_generic_attach(dev);
203
204 return (0);
205}
206
207static int
208xlr_i2c_detach(device_t dev)
209{
210 bus_generic_detach(dev);
211
212 return (0);
213}
214
215static int
216xlr_i2c_start(device_t dev, u_char slave, int timeout)
217{
218 int error = 0;
219 struct xlr_i2c_softc *sc;
220
221 sc = device_get_softc(dev);
222 mtx_lock(&sc->sc_mtx);
223 sc->sc_started = 1;
224 sc->i2cdev_addr = (slave >> 1);
225 return error;
226
227}
228
229static int
230xlr_i2c_stop(device_t dev)
231{
232 int error = 0;
233 struct xlr_i2c_softc *sc;
234
235 sc = device_get_softc(dev);
236 mtx_unlock(&sc->sc_mtx);
237 return error;
238
239}
240
241static int
242xlr_i2c_read(device_t dev, char *buf, int len, int *read, int last,
243 int delay)
244{
245 volatile uint32_t i2c_status = 0;
246 int pos=0;
247 int timeout = 0;
248
249 xlr_i2c_dev_write(dev, XLR_I2C_CFG, XLR_I2C_CFG_NOADDR);
250 xlr_i2c_dev_write(dev, XLR_I2C_BYTECNT, len);
251
252retry:
253 xlr_i2c_dev_write(dev, XLR_I2C_STARTXFR, XLR_I2C_STARTXFR_RD);
254
255 timeout = 0;
256 while(1) {
257 if(timeout++ > MAXTIME)
258 return -1;
259
260 i2c_status = xlr_i2c_dev_read(dev, XLR_I2C_STATUS);
261 if (i2c_status & XLR_I2C_RXRDY)
262 buf[pos++] = (uint8_t) xlr_i2c_dev_read(dev, XLR_I2C_DATAIN);
263
264 /* ACKERR -- bail */
265 if (i2c_status & XLR_I2C_ACK_ERR)
266 return -1; /* ACK_ERROR */
267
268 /* LOST ARB or STARTERR -- repeat */
269 if (i2c_status & XLR_I2C_ARB_STARTERR)
270 goto retry;
271
272 /* Wait for busy bit to go away */
273 if (i2c_status & XLR_I2C_BUS_BUSY)
274 continue;
275
276 if (pos == len)
277 break;
278 }
279 *read = pos;
280 return 0;
281
282}
283
284static int
285xlr_i2c_write(device_t dev, const char *buf, int len, int *sent, int timeout /* us */ )
286{
287 volatile uint32_t i2c_status = 0x00;
288 uint8_t devaddr, addr;
289 struct xlr_i2c_softc *sc;
290 int pos;
291
292 sc = device_get_softc(dev);
293
294 /* the first byte of write is addr (of register in device) */
295 addr = buf[0];
296 devaddr = sc->i2cdev_addr;
297 xlr_i2c_dev_write(dev, XLR_I2C_ADDR, addr);
298 xlr_i2c_dev_write(dev, XLR_I2C_DEVADDR, devaddr);
299 xlr_i2c_dev_write(dev, XLR_I2C_CFG, XLR_I2C_CFG_ADDR);
300 xlr_i2c_dev_write(dev, XLR_I2C_BYTECNT, len - 1);
301
302retry:
303 pos = 1;
304 if (len == 1) /* there is no data only address */
305 xlr_i2c_dev_write(dev, XLR_I2C_STARTXFR, XLR_I2C_STARTXFR_ND);
306 else {
307 xlr_i2c_dev_write(dev, XLR_I2C_STARTXFR, XLR_I2C_STARTXFR_WR);
308 xlr_i2c_dev_write(dev, XLR_I2C_DATAOUT, buf[pos]);
309 }
310
311 while (1) {
312 i2c_status = xlr_i2c_dev_read(dev, XLR_I2C_STATUS);
313
314 /* sdo empty send next byte */
315 if (i2c_status & XLR_I2C_SDOEMPTY) {
316 pos++;
317 xlr_i2c_dev_write(dev, XLR_I2C_DATAOUT, buf[pos]);
318 }
319
320 /* LOST ARB or STARTERR -- repeat */
321 if (i2c_status & XLR_I2C_ARB_STARTERR)
322 goto retry;
323
324 /* ACKERR -- bail */
325 if (i2c_status & XLR_I2C_ACK_ERR) {
326 printf("ACK ERR : exiting\n ");
327 return -1;
328 }
329
330 /* busy try again */
331 if (i2c_status & XLR_I2C_BUS_BUSY)
332 continue;
333
334 if (pos >= len)
| 33
34/*
35 * I2C driver for the Palm-BK3220 I2C Host adapter on the RMI XLR.
36 */
37
38#include <sys/param.h>
39#include <sys/systm.h>
40#include <sys/kernel.h>
41#include <sys/lock.h>
42#include <sys/module.h>
43#include <sys/mutex.h>
44#include <sys/bus.h>
45#include <sys/rman.h>
46
47
48#include <dev/iicbus/iiconf.h>
49#include <dev/iicbus/iicbus.h>
50
51#include <mips/rmi/board.h>
52#include <mips/rmi/iomap.h>
53#include <mips/include/resource.h>
54
55#include "iicbus_if.h"
56
57/* XLR I2C REGISTERS */
58#define XLR_I2C_CFG 0x00
59#define XLR_I2C_CLKDIV 0x01
60#define XLR_I2C_DEVADDR 0x02
61#define XLR_I2C_ADDR 0x03
62#define XLR_I2C_DATAOUT 0x04
63#define XLR_I2C_DATAIN 0x05
64#define XLR_I2C_STATUS 0x06
65#define XLR_I2C_STARTXFR 0x07
66#define XLR_I2C_BYTECNT 0x08
67#define XLR_I2C_HDSTATIM 0x09
68
69/* XLR I2C REGISTERS FLAGS */
70#define XLR_I2C_BUS_BUSY 0x01
71#define XLR_I2C_SDOEMPTY 0x02
72#define XLR_I2C_RXRDY 0x04
73#define XLR_I2C_ACK_ERR 0x08
74#define XLR_I2C_ARB_STARTERR 0x30
75
76/* Register Programming Values!! Change as required */
77#define XLR_I2C_CFG_ADDR 0xF8 /* 8-Bit dev Addr + POR Values */
78#define XLR_I2C_CFG_NOADDR 0xFA /* 8-Bit reg Addr + POR Values : No dev addr */
79#define XLR_I2C_STARTXFR_ND 0x02 /* No data , only addr */
80#define XLR_I2C_STARTXFR_RD 0x01 /* Read */
81#define XLR_I2C_STARTXFR_WR 0x00 /* Write */
82#define XLR_I2C_CLKDIV_DEF 0x14A /* 0x00000052 */
83#define XLR_I2C_HDSTATIM_DEF 0x107 /* 0x00000000 */
84
85#define MAXTIME 0x10000
86#define ARIZONA_I2C_BUS 1
87
88static devclass_t xlr_i2c_devclass;
89
90/*
91 * Device methods
92 */
93static int xlr_i2c_probe(device_t);
94static int xlr_i2c_attach(device_t);
95static int xlr_i2c_detach(device_t);
96
97static int xlr_i2c_start(device_t dev, u_char slave, int timeout);
98static int xlr_i2c_stop(device_t dev);
99static int xlr_i2c_read(device_t dev, char *buf, int len, int *read, int last, int delay);
100static int xlr_i2c_write(device_t dev, const char *buf, int len, int *sent, int timeout);
101static int xlr_i2c_callback(device_t dev, int index, caddr_t data);
102static int xlr_i2c_repeated_start(device_t dev, u_char slave, int timeout);
103static int xlr_i2c_transfer(device_t bus, struct iic_msg *msgs, uint32_t nmsgs);
104
105struct xlr_i2c_softc {
106 device_t dev; /* Self */
107 struct resource *mem_res; /* Memory resource */
108 volatile int flags;
109 int sc_started;
110 uint8_t i2cdev_addr;
111 xlr_reg_t *iobase_i2c_regs;
112 device_t iicbus;
113 struct mtx sc_mtx;
114};
115
116static void
117set_i2c_base(device_t dev)
118{
119 struct xlr_i2c_softc *sc;
120
121 sc = device_get_softc(dev);
122 if (device_get_unit(dev) == 0)
123 sc->iobase_i2c_regs = xlr_io_mmio(XLR_IO_I2C_0_OFFSET);
124 else
125 sc->iobase_i2c_regs = xlr_io_mmio(XLR_IO_I2C_1_OFFSET);
126}
127
128static void
129xlr_i2c_dev_write(device_t dev, int reg, int value)
130{
131 struct xlr_i2c_softc *sc;
132
133 sc = device_get_softc(dev);
134 xlr_write_reg(sc->iobase_i2c_regs, reg, value);
135 return;
136}
137
138
139static int
140xlr_i2c_dev_read(device_t dev, int reg)
141{
142 uint32_t val;
143 struct xlr_i2c_softc *sc;
144
145 sc = device_get_softc(dev);
146 val = xlr_read_reg(sc->iobase_i2c_regs, reg);
147 return ((int)val);
148}
149
150
151static int
152xlr_i2c_probe(device_t dev)
153{
154 device_set_desc(dev, "XLR/XLS I2C bus controller");
155
156 return (0);
157}
158
159
160/*
161 * We add all the devices which we know about.
162 * The generic attach routine will attach them if they are alive.
163 */
164static int
165xlr_i2c_attach(device_t dev)
166{
167 int rid;
168 struct xlr_i2c_softc *sc;
169 device_t tmpd;
170
171 if(device_get_unit(dev)!=ARIZONA_I2C_BUS) {
172 device_printf(dev, "unused iicbus instance\n");
173 return 0;
174 }
175
176 sc = device_get_softc(dev);
177 set_i2c_base(dev);
178
179 mtx_init(&sc->sc_mtx, "xlr_i2c", "xlr_i2c", MTX_DEF);
180
181 sc->mem_res = bus_alloc_resource_any(dev, SYS_RES_MEMORY, &rid, RF_ACTIVE);
182 if (sc->mem_res == NULL) {
183 printf("not able to allocate the bus resource\n");
184 }
185 if ((sc->iicbus = device_add_child(dev, "iicbus", -1)) == NULL) {
186 printf("could not allocate iicbus instance\n");
187 return -1;
188 }
189 if(xlr_board_info.xlr_i2c_device[I2C_RTC].enabled == 1) {
190 tmpd = device_add_child(sc->iicbus, "ds1374u", 0);
191 device_set_ivars(tmpd, &xlr_board_info.xlr_i2c_device[I2C_RTC]);
192 }
193 if(xlr_board_info.xlr_i2c_device[I2C_THERMAL].enabled == 1) {
194 tmpd = device_add_child(sc->iicbus, "max6657", 0);
195 device_set_ivars(tmpd, &xlr_board_info.xlr_i2c_device[I2C_THERMAL]);
196 }
197 if(xlr_board_info.xlr_i2c_device[I2C_EEPROM].enabled == 1) {
198 tmpd = device_add_child(sc->iicbus, "at24co2n", 0);
199 device_set_ivars(tmpd, &xlr_board_info.xlr_i2c_device[I2C_EEPROM]);
200 }
201
202 bus_generic_attach(dev);
203
204 return (0);
205}
206
207static int
208xlr_i2c_detach(device_t dev)
209{
210 bus_generic_detach(dev);
211
212 return (0);
213}
214
215static int
216xlr_i2c_start(device_t dev, u_char slave, int timeout)
217{
218 int error = 0;
219 struct xlr_i2c_softc *sc;
220
221 sc = device_get_softc(dev);
222 mtx_lock(&sc->sc_mtx);
223 sc->sc_started = 1;
224 sc->i2cdev_addr = (slave >> 1);
225 return error;
226
227}
228
229static int
230xlr_i2c_stop(device_t dev)
231{
232 int error = 0;
233 struct xlr_i2c_softc *sc;
234
235 sc = device_get_softc(dev);
236 mtx_unlock(&sc->sc_mtx);
237 return error;
238
239}
240
241static int
242xlr_i2c_read(device_t dev, char *buf, int len, int *read, int last,
243 int delay)
244{
245 volatile uint32_t i2c_status = 0;
246 int pos=0;
247 int timeout = 0;
248
249 xlr_i2c_dev_write(dev, XLR_I2C_CFG, XLR_I2C_CFG_NOADDR);
250 xlr_i2c_dev_write(dev, XLR_I2C_BYTECNT, len);
251
252retry:
253 xlr_i2c_dev_write(dev, XLR_I2C_STARTXFR, XLR_I2C_STARTXFR_RD);
254
255 timeout = 0;
256 while(1) {
257 if(timeout++ > MAXTIME)
258 return -1;
259
260 i2c_status = xlr_i2c_dev_read(dev, XLR_I2C_STATUS);
261 if (i2c_status & XLR_I2C_RXRDY)
262 buf[pos++] = (uint8_t) xlr_i2c_dev_read(dev, XLR_I2C_DATAIN);
263
264 /* ACKERR -- bail */
265 if (i2c_status & XLR_I2C_ACK_ERR)
266 return -1; /* ACK_ERROR */
267
268 /* LOST ARB or STARTERR -- repeat */
269 if (i2c_status & XLR_I2C_ARB_STARTERR)
270 goto retry;
271
272 /* Wait for busy bit to go away */
273 if (i2c_status & XLR_I2C_BUS_BUSY)
274 continue;
275
276 if (pos == len)
277 break;
278 }
279 *read = pos;
280 return 0;
281
282}
283
284static int
285xlr_i2c_write(device_t dev, const char *buf, int len, int *sent, int timeout /* us */ )
286{
287 volatile uint32_t i2c_status = 0x00;
288 uint8_t devaddr, addr;
289 struct xlr_i2c_softc *sc;
290 int pos;
291
292 sc = device_get_softc(dev);
293
294 /* the first byte of write is addr (of register in device) */
295 addr = buf[0];
296 devaddr = sc->i2cdev_addr;
297 xlr_i2c_dev_write(dev, XLR_I2C_ADDR, addr);
298 xlr_i2c_dev_write(dev, XLR_I2C_DEVADDR, devaddr);
299 xlr_i2c_dev_write(dev, XLR_I2C_CFG, XLR_I2C_CFG_ADDR);
300 xlr_i2c_dev_write(dev, XLR_I2C_BYTECNT, len - 1);
301
302retry:
303 pos = 1;
304 if (len == 1) /* there is no data only address */
305 xlr_i2c_dev_write(dev, XLR_I2C_STARTXFR, XLR_I2C_STARTXFR_ND);
306 else {
307 xlr_i2c_dev_write(dev, XLR_I2C_STARTXFR, XLR_I2C_STARTXFR_WR);
308 xlr_i2c_dev_write(dev, XLR_I2C_DATAOUT, buf[pos]);
309 }
310
311 while (1) {
312 i2c_status = xlr_i2c_dev_read(dev, XLR_I2C_STATUS);
313
314 /* sdo empty send next byte */
315 if (i2c_status & XLR_I2C_SDOEMPTY) {
316 pos++;
317 xlr_i2c_dev_write(dev, XLR_I2C_DATAOUT, buf[pos]);
318 }
319
320 /* LOST ARB or STARTERR -- repeat */
321 if (i2c_status & XLR_I2C_ARB_STARTERR)
322 goto retry;
323
324 /* ACKERR -- bail */
325 if (i2c_status & XLR_I2C_ACK_ERR) {
326 printf("ACK ERR : exiting\n ");
327 return -1;
328 }
329
330 /* busy try again */
331 if (i2c_status & XLR_I2C_BUS_BUSY)
332 continue;
333
334 if (pos >= len)
|
335 break;;
| 335 break;
|
336 }
337 *sent = len - 1;
338 return 0;
339}
340
341
342
343static int
344xlr_i2c_callback(device_t dev, int index, caddr_t data)
345{
346 return 0;
347}
348
349static int
350xlr_i2c_repeated_start(device_t dev, u_char slave, int timeout)
351{
352 return 0;
353}
354
355/*
356 * I2C bus transfer for RMI boards and devices.
357 * Generic version of iicbus_transfer that calls the appropriate
358 * routines to accomplish this. See note above about acceptable
359 * buffer addresses.
360 */
361int
362xlr_i2c_transfer(device_t bus, struct iic_msg *msgs, uint32_t nmsgs)
363{
364 int i, error, lenread, lenwrote;
365 u_char addr;
366
367 addr = msgs[0].slave | LSB;
368 error = xlr_i2c_start(bus, addr, 0);
369 for (i = 0, error = 0; i < nmsgs && error == 0; i++) {
370 if (msgs[i].flags & IIC_M_RD) {
371 error = xlr_i2c_read((bus), msgs[i].buf, msgs[i].len, &lenread, IIC_LAST_READ, 0);
372 }
373 else {
374 error = xlr_i2c_write((bus), msgs[i].buf, msgs[i].len, &lenwrote, 0);
375 }
376 }
377 error = xlr_i2c_stop(bus);
378 return (error);
379}
380
381
382static device_method_t xlr_i2c_methods[] = {
383 /* device interface */
384 DEVMETHOD(device_probe, xlr_i2c_probe),
385 DEVMETHOD(device_attach, xlr_i2c_attach),
386 DEVMETHOD(device_detach, xlr_i2c_detach),
387
388 /* iicbus interface */
389 DEVMETHOD(iicbus_callback, xlr_i2c_callback),
390 DEVMETHOD(iicbus_repeated_start, xlr_i2c_repeated_start),
391 DEVMETHOD(iicbus_start, xlr_i2c_start),
392 DEVMETHOD(iicbus_stop, xlr_i2c_stop),
393 DEVMETHOD(iicbus_write, xlr_i2c_write),
394 DEVMETHOD(iicbus_read, xlr_i2c_read),
395 DEVMETHOD(iicbus_transfer, xlr_i2c_transfer),
396 {0, 0}
397};
398
399static driver_t xlr_i2c_driver = {
400 "xlr_i2c",
401 xlr_i2c_methods,
402 sizeof(struct xlr_i2c_softc),
403};
404
405DRIVER_MODULE(xlr_i2c, iodi, xlr_i2c_driver, xlr_i2c_devclass, 0, 0);
406DRIVER_MODULE(iicbus, xlr_i2c, iicbus_driver, iicbus_devclass, 0, 0);
| 336 }
337 *sent = len - 1;
338 return 0;
339}
340
341
342
343static int
344xlr_i2c_callback(device_t dev, int index, caddr_t data)
345{
346 return 0;
347}
348
349static int
350xlr_i2c_repeated_start(device_t dev, u_char slave, int timeout)
351{
352 return 0;
353}
354
355/*
356 * I2C bus transfer for RMI boards and devices.
357 * Generic version of iicbus_transfer that calls the appropriate
358 * routines to accomplish this. See note above about acceptable
359 * buffer addresses.
360 */
361int
362xlr_i2c_transfer(device_t bus, struct iic_msg *msgs, uint32_t nmsgs)
363{
364 int i, error, lenread, lenwrote;
365 u_char addr;
366
367 addr = msgs[0].slave | LSB;
368 error = xlr_i2c_start(bus, addr, 0);
369 for (i = 0, error = 0; i < nmsgs && error == 0; i++) {
370 if (msgs[i].flags & IIC_M_RD) {
371 error = xlr_i2c_read((bus), msgs[i].buf, msgs[i].len, &lenread, IIC_LAST_READ, 0);
372 }
373 else {
374 error = xlr_i2c_write((bus), msgs[i].buf, msgs[i].len, &lenwrote, 0);
375 }
376 }
377 error = xlr_i2c_stop(bus);
378 return (error);
379}
380
381
382static device_method_t xlr_i2c_methods[] = {
383 /* device interface */
384 DEVMETHOD(device_probe, xlr_i2c_probe),
385 DEVMETHOD(device_attach, xlr_i2c_attach),
386 DEVMETHOD(device_detach, xlr_i2c_detach),
387
388 /* iicbus interface */
389 DEVMETHOD(iicbus_callback, xlr_i2c_callback),
390 DEVMETHOD(iicbus_repeated_start, xlr_i2c_repeated_start),
391 DEVMETHOD(iicbus_start, xlr_i2c_start),
392 DEVMETHOD(iicbus_stop, xlr_i2c_stop),
393 DEVMETHOD(iicbus_write, xlr_i2c_write),
394 DEVMETHOD(iicbus_read, xlr_i2c_read),
395 DEVMETHOD(iicbus_transfer, xlr_i2c_transfer),
396 {0, 0}
397};
398
399static driver_t xlr_i2c_driver = {
400 "xlr_i2c",
401 xlr_i2c_methods,
402 sizeof(struct xlr_i2c_softc),
403};
404
405DRIVER_MODULE(xlr_i2c, iodi, xlr_i2c_driver, xlr_i2c_devclass, 0, 0);
406DRIVER_MODULE(iicbus, xlr_i2c, iicbus_driver, iicbus_devclass, 0, 0);
|