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I2C drivers for XLR/XLS processors.

Browse Source 
- Major update to xlr_i2c.c: do multi-byte ops correctly, remove unnecessary
  code, add mutex to protect bus operations, style(9) fixes.
- Drivers for I2C devices on XLR/XLS engineering boards, ds1374u RTC, max6657
  temparature sensor and at24co2n EEPROM.

Submitted by:	Sreekanth M. S. (kanthms at netlogicmicro com)
This commit is contained in:
jchandra 2010-12-12 06:00:26 +00:00
parent 9daf74d4c8
commit d381cdd7a8
9 changed files with 708 additions and 260 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

14
sys/mips/conf/XLR
View File

@ -143,13 +143,13 @@ device umass # Disks/Mass storage - Requires scbus and da
#i2c
# Not yet
#device ic
#device iic
#device iicbb
#device iicbus
#device xlr_rtc
#device xlr_temperature
#device xlr_eeprom
device ic
device iic
device iicbb
device iicbus
device ds1374u # RTC on XLR boards
device max6657 # Temparature sensor on XLR boards
device at24co2n # EEPROM on XLR boards
#crypto
# Not yet

19
sys/mips/rmi/board.c
View File

@ -42,6 +42,11 @@ __FBSDID("$FreeBSD$");
#include <mips/rmi/board.h>
#include <mips/rmi/pic.h>
#define XLR_I2C_RTC_ADDR 0xd0
#define XLR_I2C_EEPROM_ADDR 0xa0
#define XLR_I2C_TEMPSENSOR_ADDR 0x98
#define XLR_I2C_ATX8_TEMPSENSOR_ADDR 0x9a
struct stn_cc *xlr_core_cc_configs[] = { &cc_table_cpu_0, &cc_table_cpu_1,
&cc_table_cpu_2, &cc_table_cpu_3, &cc_table_cpu_4, &cc_table_cpu_5,
&cc_table_cpu_6, &cc_table_cpu_7};
@ -231,6 +236,7 @@ xls_board_specific_overrides(struct xlr_board_info* board)
{
struct xlr_gmac_block_t *blk0, *blk1;
int i;
struct xlr_i2c_dev_t* iic_blk;
blk0 = &board->gmac_block[0];
blk1 = &board->gmac_block[1];
@ -283,6 +289,10 @@ xls_board_specific_overrides(struct xlr_board_info* board)
break;
case RMI_XLR_BOARD_ARIZONA_VIII:
iic_blk = &xlr_board_info.xlr_i2c_device[I2C_THERMAL];
if (iic_blk->enabled) {
iic_blk->addr = XLR_I2C_ATX8_TEMPSENSOR_ADDR;
}
if (blk1->enabled) {
/* There is just one Octal PHY on the board and it is
* connected to the MII interface for NA Quad 0. */
@ -358,6 +368,7 @@ int
xlr_board_info_setup()
{
struct xlr_gmac_block_t *blk0, *blk1, *blk2;
struct xlr_i2c_dev_t* iic_blk;
int i;
/* This setup code is long'ish because the same base driver
@ -413,6 +424,14 @@ xlr_board_info_setup()
blk1 = &xlr_board_info.gmac_block[1];
blk2 = &xlr_board_info.gmac_block[2];
iic_blk = xlr_board_info.xlr_i2c_device;
iic_blk[I2C_RTC].enabled = 1;
iic_blk[I2C_RTC].addr = XLR_I2C_RTC_ADDR;
iic_blk[I2C_THERMAL].enabled = 1;
iic_blk[I2C_THERMAL].addr = XLR_I2C_TEMPSENSOR_ADDR;
iic_blk[I2C_EEPROM].enabled = 1;
iic_blk[I2C_EEPROM].addr = XLR_I2C_EEPROM_ADDR;
if (xlr_is_xls()) {
xlr_board_info.is_xls = 1;
xlr_board_info.nr_cpus = 8;

8
sys/mips/rmi/board.h
View File

@ -195,6 +195,7 @@ xlr_is_xls_b0(void)
/* all our knowledge of chip and board that cannot be detected run-time goes here */
enum gmac_block_types { XLR_GMAC, XLR_XGMAC, XLR_SPI4};
enum gmac_port_types { XLR_RGMII, XLR_SGMII, XLR_PORT0_RGMII, XLR_XGMII, XLR_XAUI };
enum i2c_dev_types { I2C_RTC, I2C_THERMAL, I2C_EEPROM };
struct xlr_board_info {
int is_xls;
@ -207,6 +208,13 @@ struct xlr_board_info {
struct bucket_size *bucket_sizes; /* pointer to Core station bucket */
int *msgmap; /* mapping of message station to devices */
int gmacports; /* number of gmac ports on the board */
struct xlr_i2c_dev_t {
uint32_t addr;
unsigned int enabled; /* mask of devs enabled */
int type;
int unit;
char *dev_name;
} xlr_i2c_device[3];
struct xlr_gmac_block_t { /* refers to the set of GMACs controlled by a
network accelarator */
int type; /* see enum gmac_block_types */

145
sys/mips/rmi/dev/iic/at24co2n.c Normal file
View File

@ -0,0 +1,145 @@
/*-
* Copyright (c) 2003-2009 RMI Corporation
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of RMI Corporation, nor the names of its contributors,
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* RMI_BSD */
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
/*
* reading eeprom for the mac address .
*/
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/kernel.h>
#include <sys/lock.h>
#include <sys/module.h>
#include <sys/mutex.h>
#include <sys/bus.h>
#include <sys/resource.h>
#include <sys/rman.h>
#include <sys/sysctl.h>
#include <machine/bus.h>
#include <machine/cpu.h>
#include <machine/cpufunc.h>
#include <machine/frame.h>
#include <machine/resource.h>
#include <dev/iicbus/iiconf.h>
#include <dev/iicbus/iicbus.h>
#include "iicbus_if.h"
#define AT24CO_EEPROM_ETH_MACADDR 0x20
struct at24co2n_softc {
uint32_t sc_addr;
device_t sc_dev;
struct mtx sc_mtx;
uint8_t sc_mac_addr[6];
};
static void at24co2n_read_mac(struct at24co2n_softc *);
static int
at24co2n_probe(device_t dev)
{
device_set_desc(dev, "AT24Co2N-10SE-2.7 EEPROM for mac address");
return (0);
}
static int
at24co2n_mac_sysctl(SYSCTL_HANDLER_ARGS)
{
struct at24co2n_softc *sc = arg1;
char buf[24];
int len;
uint8_t *p;
at24co2n_read_mac(sc);
p = sc->sc_mac_addr;
len = snprintf(buf, sizeof(buf), "%02x:%02x:%02x:%02x:%02x:%02x",
p[0], p[1], p[2], p[3], p[4], p[5]);
return SYSCTL_OUT(req, buf, len);
}
static int
at24co2n_attach(device_t dev)
{
struct at24co2n_softc *sc = device_get_softc(dev);
struct sysctl_ctx_list *ctx = device_get_sysctl_ctx(dev);
struct sysctl_oid *tree = device_get_sysctl_tree(dev);
if(sc == NULL) {
printf("at24co2n_attach device_get_softc failed\n");
return (0);
}
sc->sc_dev = dev;
sc->sc_addr = iicbus_get_addr(dev);
mtx_init(&sc->sc_mtx, "eeprom", "eeprom", MTX_DEF);
SYSCTL_ADD_PROC(ctx, SYSCTL_CHILDREN(tree), OID_AUTO,
"eeprom-mac", CTLTYPE_STRING | CTLFLAG_RD, sc, 0,
at24co2n_mac_sysctl, "A", "mac address");
return (0);
}
static void
at24co2n_read_mac(struct at24co2n_softc *sc)
{
uint8_t addr = AT24CO_EEPROM_ETH_MACADDR;
struct iic_msg msgs[2] = {
{ sc->sc_addr, IIC_M_WR, 1, &addr },
{ sc->sc_addr, IIC_M_RD, 6, sc->sc_mac_addr},
};
mtx_lock(&sc->sc_mtx);
iicbus_transfer(sc->sc_dev, msgs, 2);
mtx_unlock(&sc->sc_mtx);
}
static device_method_t at24co2n_methods[] = {
DEVMETHOD(device_probe, at24co2n_probe),
DEVMETHOD(device_attach, at24co2n_attach),
{0, 0},
};
static driver_t at24co2n_driver = {
"at24co2n",
at24co2n_methods,
sizeof(struct at24co2n_softc),
};
static devclass_t at24co2n_devclass;
DRIVER_MODULE(at24co2n, iicbus, at24co2n_driver, at24co2n_devclass, 0, 0);
MODULE_VERSION(at24co2n, 1);
MODULE_DEPEND(at24co2n, iicbus, 1, 1, 1);

162
sys/mips/rmi/dev/iic/ds1374u.c Normal file
View File

@ -0,0 +1,162 @@
/*-
* Copyright (c) 2003-2009 RMI Corporation
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of RMI Corporation, nor the names of its contributors,
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* RMI_BSD */
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
/*
* RTC chip sitting on the I2C bus.
*/
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/kernel.h>
#include <sys/module.h>
#include <sys/bus.h>
#include <sys/clock.h>
#include <sys/time.h>
#include <sys/resource.h>
#include <sys/rman.h>
#include <mips/include/bus.h>
#include <mips/include/cpu.h>
#include <mips/include/cpufunc.h>
#include <mips/include/frame.h>
#include <mips/include/resource.h>
#include <dev/iicbus/iiconf.h>
#include <dev/iicbus/iicbus.h>
#include "iicbus_if.h"
#include "clock_if.h"
#define DS1374_RTC_COUNTER 0 /* counter (bytes 0-3) */
struct ds1374u_softc {
uint32_t sc_addr;
device_t sc_dev;
};
static int
ds1374u_probe(device_t dev)
{
device_set_desc(dev, "DS1374U-33 RTC");
return (0);
}
static int
ds1374u_attach(device_t dev)
{
struct ds1374u_softc *sc = device_get_softc(dev);
if(sc==NULL) {
printf("ds1374u_attach device_get_softc failed\n");
return (0);
}
sc->sc_dev = dev;
sc->sc_addr = iicbus_get_addr(dev);
clock_register(dev, 1000);
return (0);
}
static int
ds1374u_write(device_t dev, int reg, uint8_t val)
{
uint8_t data[2];
struct ds1374u_softc *sc = device_get_softc(dev);
struct iic_msg msgs[1] = {
{ sc->sc_addr, IIC_M_WR, 2, data },
};
data[0] = reg;
data[1] = val;
if (iicbus_transfer(dev, msgs, 1) == 0)
return (0);
else
return (-1);
}
static int
ds1374u_settime(device_t dev, struct timespec *ts)
{
int i;
int temp = 0;
for (i = 0; i < 4; i++) {
temp = (ts->tv_sec >> (8*i)) & 0xff;
if (ds1374u_write(dev, DS1374_RTC_COUNTER+i, temp)!=0)
return (-1);
}
return 0;
}
static int
ds1374u_gettime(device_t dev, struct timespec *ts)
{
struct ds1374u_softc *sc = device_get_softc(dev);
uint8_t addr[1] = { DS1374_RTC_COUNTER };
uint8_t secs[4];
struct iic_msg msgs[2] = {
{ sc->sc_addr, IIC_M_WR, 1, addr },
{ sc->sc_addr, IIC_M_RD, 4, secs },
};
int error;
error = iicbus_transfer(dev, msgs, 2);
if (error == 0) {
/* counter has seconds since epoch */
ts->tv_sec = (secs[3] << 24) | (secs[2] << 16)
| (secs[1] << 8) | (secs[0] << 0);
ts->tv_nsec = 0;
}
return error;
return 0;
}
static device_method_t ds1374u_methods[] = {
DEVMETHOD(device_probe, ds1374u_probe),
DEVMETHOD(device_attach, ds1374u_attach),
DEVMETHOD(clock_gettime, ds1374u_gettime),
DEVMETHOD(clock_settime, ds1374u_settime),
{0, 0},
};
static driver_t ds1374u_driver = {
"ds1374u",
ds1374u_methods,
sizeof(struct ds1374u_softc),
};
static devclass_t ds1374u_devclass;
DRIVER_MODULE(ds1374u, iicbus, ds1374u_driver, ds1374u_devclass, 0, 0);
MODULE_VERSION(ds1374u, 1);
MODULE_DEPEND(ds1374u, iicbus, 1, 1, 1);

162
sys/mips/rmi/dev/iic/max6657.c Normal file
View File

@ -0,0 +1,162 @@
/*-
* Copyright (c) 2003-2009 RMI Corporation
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of RMI Corporation, nor the names of its contributors,
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* RMI_BSD */
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
/*
* temperature sensor chip sitting on the I2C bus.
*/
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/kernel.h>
#include <sys/lock.h>
#include <sys/module.h>
#include <sys/mutex.h>
#include <sys/bus.h>
#include <sys/resource.h>
#include <sys/rman.h>
#include <sys/sysctl.h>
#include <machine/bus.h>
#include <machine/cpu.h>
#include <machine/cpufunc.h>
#include <machine/frame.h>
#include <machine/resource.h>
#include <dev/iicbus/iiconf.h>
#include <dev/iicbus/iicbus.h>
#include <mips/rmi/board.h>
#include <mips/rmi/rmi_boot_info.h>
#include "iicbus_if.h"
#define MAX6657_EXT_TEMP 1
struct max6657_softc {
uint32_t sc_addr;
device_t sc_dev;
struct mtx sc_mtx;
int sc_curtemp;
int sc_lastupdate; /* in ticks */
};
static void max6657_update(struct max6657_softc *);
static int max6657_read(device_t dev, uint32_t addr, int reg) ;
static int
max6657_probe(device_t dev)
{
device_set_desc(dev, "MAX6657MSA Temperature Sensor");
return (0);
}
static int
max6657_sysctl_temp(SYSCTL_HANDLER_ARGS)
{
struct max6657_softc *sc = arg1;
int temp;
max6657_update(sc);
temp = sc->sc_curtemp ;
return sysctl_handle_int(oidp, &temp, 0, req);
}
static int
max6657_attach(device_t dev)
{
struct max6657_softc *sc = device_get_softc(dev);
struct sysctl_ctx_list *ctx = device_get_sysctl_ctx(dev);
struct sysctl_oid *tree = device_get_sysctl_tree(dev);
if(sc==NULL) {
printf("max6657_attach device_get_softc failed\n");
return (0);
}
sc->sc_dev = dev;
sc->sc_addr = iicbus_get_addr(dev);
mtx_init(&sc->sc_mtx, "max6657", "max6657", MTX_DEF);
SYSCTL_ADD_PROC(ctx, SYSCTL_CHILDREN(tree), OID_AUTO,
"temp", CTLTYPE_INT | CTLFLAG_RD, sc, 0,
max6657_sysctl_temp, "I", "operating temperature");
device_printf(dev, "Chip temperature {%d} Degree Celsius\n",
max6657_read(sc->sc_dev, sc->sc_addr, MAX6657_EXT_TEMP));
return (0);
}
static int
max6657_read(device_t dev, uint32_t slave_addr, int reg)
{
uint8_t addr = reg;
uint8_t data[1];
struct iic_msg msgs[2] = {
{ slave_addr, IIC_M_WR, 1, &addr },
{ slave_addr, IIC_M_RD, 1, data },
};
return iicbus_transfer(dev, msgs, 2) != 0 ? -1 : data[0];
}
static void
max6657_update(struct max6657_softc *sc)
{
int v;
mtx_lock(&sc->sc_mtx);
/* NB: no point in updating any faster than the chip */
if (ticks - sc->sc_lastupdate > hz) {
v = max6657_read(sc->sc_dev, sc->sc_addr, MAX6657_EXT_TEMP);
if (v >= 0)
sc->sc_curtemp = v;
sc->sc_lastupdate = ticks;
}
mtx_unlock(&sc->sc_mtx);
}
static device_method_t max6657_methods[] = {
DEVMETHOD(device_probe, max6657_probe),
DEVMETHOD(device_attach, max6657_attach),
{0, 0},
};
static driver_t max6657_driver = {
"max6657",
max6657_methods,
sizeof(struct max6657_softc),
};
static devclass_t max6657_devclass;
DRIVER_MODULE(max6657, iicbus, max6657_driver, max6657_devclass, 0, 0);
MODULE_VERSION(max6657, 1);
MODULE_DEPEND(max6657, iicbus, 1, 1, 1);

6
sys/mips/rmi/files.xlr
View File

@ -22,6 +22,6 @@ mips/rmi/dev/sec/rmisec.c optional rmisec
mips/rmi/dev/sec/rmilib.c optional rmisec
mips/rmi/dev/xlr/rge.c optional rge
mips/rmi/dev/nlge/if_nlge.c optional nlge
dev/iicbus/xlr_rtc.c optional xlr_rtc
dev/iicbus/xlr_temperature.c optional xlr_temperature
dev/iicbus/xlr_eeprom.c optional xlr_eeprom
mips/rmi/dev/iic/ds1374u.c optional ds1374u
mips/rmi/dev/iic/max6657.c optional max6657
mips/rmi/dev/iic/at24co2n.c optional at24co2n

1
sys/mips/rmi/iodi.c
View File

@ -212,6 +212,7 @@ iodi_attach(device_t dev)
*/
device_add_child(dev, "uart", 0);
device_add_child(dev, "xlr_i2c", 0);
device_add_child(dev, "xlr_i2c", 1);
device_add_child(dev, "pcib", 0);
device_add_child(dev, "rmisec", -1);

443
sys/mips/rmi/xlr_i2c.c
View File

@ -38,7 +38,9 @@ __FBSDID("$FreeBSD$");
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/kernel.h>
#include <sys/lock.h>
#include <sys/module.h>
#include <sys/mutex.h>
#include <sys/bus.h>
#include <sys/rman.h>
@ -46,44 +48,42 @@ __FBSDID("$FreeBSD$");
#include <dev/iicbus/iiconf.h>
#include <dev/iicbus/iicbus.h>
#include <mips/rmi/board.h>
#include <mips/rmi/iomap.h>
#include <mips/include/resource.h>
#include "iicbus_if.h"
#define DEVTOIICBUS(dev) ((struct iicbus_device*)device_get_ivars(dev))
/* XLR I2C REGISTERS */
#define XLR_I2C_CFG 0x00
#define XLR_I2C_CLKDIV 0x01
#define XLR_I2C_DEVADDR 0x02
#define XLR_I2C_ADDR 0x03
#define XLR_I2C_DATAOUT 0x04
#define XLR_I2C_DATAIN 0x05
#define XLR_I2C_STATUS 0x06
#define XLR_I2C_STARTXFR 0x07
#define XLR_I2C_BYTECNT 0x08
#define XLR_I2C_HDSTATIM 0x09
#define I2C_PALM_CFG 0x00
#define I2C_PALM_CLKDIV 0x01
#define I2C_PALM_DEVADDR 0x02
#define I2C_PALM_ADDR 0x03
#define I2C_PALM_DATAOUT 0x04
#define I2C_PALM_DATAIN 0x05
#define I2C_PALM_STATUS 0x06
#define I2C_PALM_STARTXFR 0x07
#define I2C_PALM_BYTECNT 0x08
#define I2C_PALM_HDSTATIM 0x09
/* XLR I2C REGISTERS FLAGS */
#define XLR_I2C_BUS_BUSY 0x01
#define XLR_I2C_SDOEMPTY 0x02
#define XLR_I2C_RXRDY 0x04
#define XLR_I2C_ACK_ERR 0x08
#define XLR_I2C_ARB_STARTERR 0x30
/* TEST Values!! Change as required */
#define I2C_PALM_CFG_DEF 0x000000F8 /* 8-Bit Addr + POR Values */
#define I2C_PALM_CLKDIV_DEF 0x14A //0x00000052
#define I2C_PALM_HDSTATIM_DEF 0x107 //0x00000000
/* Register Programming Values!! Change as required */
#define XLR_I2C_CFG_ADDR 0xF8 /* 8-Bit dev Addr + POR Values */
#define XLR_I2C_CFG_NOADDR 0xFA /* 8-Bit reg Addr + POR Values : No dev addr */
#define XLR_I2C_STARTXFR_ND 0x02 /* No data , only addr */
#define XLR_I2C_STARTXFR_RD 0x01 /* Read */
#define XLR_I2C_STARTXFR_WR 0x00 /* Write */
#define XLR_I2C_CLKDIV_DEF 0x14A /* 0x00000052 */
#define XLR_I2C_HDSTATIM_DEF 0x107 /* 0x00000000 */
#define I2C_PALM_STARTXFR_RD 0x00000001
#define I2C_PALM_STARTXFR_WR 0x00000000
#define PHOENIX_IO_I2C_0_OFFSET 0x16000
#define PHOENIX_IO_I2C_1_OFFSET 0x17000
#define ARIZONA_I2c_BUS 1
int bus = 1;
uint8_t current_slave;
uint8_t read_address;
static xlr_reg_t *iobase_i2c_regs;
#define MAXTIME 0x10000
#define ARIZONA_I2C_BUS 1
static devclass_t xlr_i2c_devclass;
@ -97,206 +97,61 @@ static int xlr_i2c_detach(device_t);
static int xlr_i2c_start(device_t dev, u_char slave, int timeout);
static int xlr_i2c_stop(device_t dev);
static int xlr_i2c_read(device_t dev, char *buf, int len, int *read, int last, int delay);
static int xlr_i2c_write(device_t dev, char *buf, int len, int *sent, int timeout);
static int xlr_i2c_write(device_t dev, const char *buf, int len, int *sent, int timeout);
static int xlr_i2c_callback(device_t dev, int index, caddr_t data);
static int xlr_i2c_repeated_start(device_t dev, u_char slave, int timeout);
static int xlr_i2c_transfer(device_t bus, struct iic_msg *msgs, uint32_t nmsgs);
struct xlr_i2c_softc {
device_t dev; /* Myself */
device_t dev; /* Self */
struct resource *mem_res; /* Memory resource */
volatile int flags;
#define RXRDY 4
#define TXRDY 0x10
int sc_started;
int twi_addr;
uint8_t i2cdev_addr;
xlr_reg_t *iobase_i2c_regs;
device_t iicbus;
struct mtx sc_mtx;
};
#define MDELAY(a){ \
unsigned long local_loop = 0xfffff; \
while(local_loop--); \
}\
static void
get_i2c_base(void)
set_i2c_base(device_t dev)
{
if (bus == 0)
iobase_i2c_regs = xlr_io_mmio(PHOENIX_IO_I2C_0_OFFSET);
struct xlr_i2c_softc *sc;
sc = device_get_softc(dev);
if (device_get_unit(dev) == 0)
sc->iobase_i2c_regs = xlr_io_mmio(XLR_IO_I2C_0_OFFSET);
else
iobase_i2c_regs = xlr_io_mmio(PHOENIX_IO_I2C_1_OFFSET);
return;
sc->iobase_i2c_regs = xlr_io_mmio(XLR_IO_I2C_1_OFFSET);
}
static void
palm_write(int reg, int value)
xlr_i2c_dev_write(device_t dev, int reg, int value)
{
get_i2c_base();
xlr_write_reg(iobase_i2c_regs, reg, value);
struct xlr_i2c_softc *sc;
sc = device_get_softc(dev);
xlr_write_reg(sc->iobase_i2c_regs, reg, value);
return;
}
static int
palm_read(int reg)
xlr_i2c_dev_read(device_t dev, int reg)
{
uint32_t val;
struct xlr_i2c_softc *sc;
get_i2c_base();
val = xlr_read_reg(iobase_i2c_regs, reg);
sc = device_get_softc(dev);
val = xlr_read_reg(sc->iobase_i2c_regs, reg);
return ((int)val);
}
static int
palm_addr_only(uint8_t addr, uint8_t offset)
{
volatile uint32_t regVal = 0x00;
palm_write(I2C_PALM_ADDR, offset);
palm_write(I2C_PALM_DEVADDR, addr);
palm_write(I2C_PALM_CFG, 0xfa);
palm_write(I2C_PALM_STARTXFR, 0x02);
regVal = palm_read(I2C_PALM_STATUS);
if (regVal & 0x0008) {
printf("palm_addr_only: ACKERR. Aborting...\n");
return -1;
}
return 0;
}
static int
palm_rx(uint8_t addr, uint8_t offset, uint8_t len,
uint8_t * buf)
{
volatile uint32_t regVal = 0x00, ctr = 0x00;
int timeOut, numBytes = 0x00;
palm_write(I2C_PALM_CFG, 0xfa);
palm_write(I2C_PALM_BYTECNT, len);
palm_write(I2C_PALM_DEVADDR, addr);
//DEVADDR = 0x4c, 0x68
MDELAY(1);
for (numBytes = 0x00; numBytes < len; numBytes++) {
palm_write(I2C_PALM_ADDR, offset + numBytes);
//I2C_PALM_ADDR:offset
MDELAY(1);
if (!ctr) {
/* Trigger a READ Transaction */
palm_write(I2C_PALM_STARTXFR, I2C_PALM_STARTXFR_RD);
ctr++;
}
/* Error Conditions [Begin] */
regVal = palm_read(I2C_PALM_STATUS);
MDELAY(1);
if (regVal & 0x0008) {
printf("palm_rx: ACKERR. Aborting...\n");
return -1;
}
timeOut = 10;
while ((regVal & 0x0030) && timeOut--) {
palm_write(I2C_PALM_STARTXFR, I2C_PALM_STARTXFR_RD);
regVal = palm_read(I2C_PALM_STATUS);
}
if (timeOut == 0x00) {
printf("palm_rx: TimedOut on Valid STARTXFR/Arbitration\n");
return -1;
}
timeOut = 10;
/* Do we have valid data from the device yet..? */
regVal &= 0x0004;
while (!regVal && timeOut--) {
regVal = palm_read(I2C_PALM_STATUS) & 0x0004;
}
if (timeOut == 0x00) {
printf("palm_rx: TimedOut Waiting for Valid Data\n");
return -1;
}
/* Error Conditions [End] */
/* Read the data */
buf[numBytes] = (uint8_t) palm_read(I2C_PALM_DATAIN);
}
return 0;
}
static int
wait_for_idle(void)
{
int timeOut = 0x1000;
volatile uint32_t regVal = 0x00;
regVal = palm_read(I2C_PALM_STATUS) & 0x0001;
while (regVal && timeOut--) {
regVal = palm_read(I2C_PALM_STATUS) & 0x0001;
}
if (timeOut == 0x00)
return -1; /* Timed Out */
else
return 0;
}
static int
palm_tx(uint8_t addr, uint8_t offset, uint8_t * buf, uint8_t len)
{
volatile uint32_t regVal = 0x00;
int timeOut, ctr = 0x00, numBytes = len;
for (ctr = 0x00; ctr < len; ctr++) {
if (wait_for_idle() < 0) {
printf("TimedOut on Waiting for I2C Bus Idle.\n");
return -EIO;
}
palm_write(I2C_PALM_CFG, 0xF8);
palm_write(I2C_PALM_BYTECNT, 0x00);
palm_write(I2C_PALM_DEVADDR, addr);
//0x4c, 0x68
palm_write(I2C_PALM_ADDR, offset + numBytes - 1);
//offset
palm_write(I2C_PALM_DATAOUT, buf[ctr]);
palm_write(I2C_PALM_STARTXFR, I2C_PALM_STARTXFR_WR);
MDELAY(1);
regVal = palm_read(I2C_PALM_STATUS);
MDELAY(1);
if (regVal & 0x0008) {
printf("palm_tx: ACKERR. Aborting...\n");
return -1;
}
timeOut = 0x1000;
while (!(regVal & 0x0002) && timeOut) {
regVal = palm_read(I2C_PALM_STATUS);
timeOut--;
}
if (timeOut == 0x00) {
printf("palm_tx: [TimeOut] SDOEMPTY Not Set\n");
return -1;
}
timeOut = 1000;
while ((regVal & 0x0030) && timeOut) {
palm_write(I2C_PALM_STARTXFR, I2C_PALM_STARTXFR_WR);
regVal = palm_read(I2C_PALM_STATUS);
timeOut--;
}
if (timeOut == 0x00) {
printf("palm_rx: TimedOut on Valid STARTXFR/Arbitration\n");
return -1;
}
numBytes--;
}
return 0;
}
static int
xlr_i2c_probe(device_t dev)
{
device_set_desc(dev, "I2C bus controller");
device_set_desc(dev, "XLR/XLS I2C bus controller");
return (0);
}
@ -309,17 +164,40 @@ xlr_i2c_probe(device_t dev)
static int
xlr_i2c_attach(device_t dev)
{
struct xlr_i2c_softc *sc;
int rid;
struct xlr_i2c_softc *sc;
device_t tmpd;
if(device_get_unit(dev)!=ARIZONA_I2C_BUS) {
device_printf(dev, "unused iicbus instance\n");
return 0;
}
sc = device_get_softc(dev);
sc->mem_res = bus_alloc_resource_any(dev, SYS_RES_MEMORY, &rid,
RF_ACTIVE);
set_i2c_base(dev);
mtx_init(&sc->sc_mtx, "xlr_i2c", "xlr_i2c", MTX_DEF);
sc->mem_res = bus_alloc_resource_any(dev, SYS_RES_MEMORY, &rid, RF_ACTIVE);
if (sc->mem_res == NULL) {
printf("not able to allocate the bus resource\n");
}
if ((sc->iicbus = device_add_child(dev, "iicbus", -1)) == NULL)
if ((sc->iicbus = device_add_child(dev, "iicbus", -1)) == NULL) {
printf("could not allocate iicbus instance\n");
return -1;
}
if(xlr_board_info.xlr_i2c_device[I2C_RTC].enabled == 1) {
tmpd = device_add_child(sc->iicbus, "ds1374u", 0);
device_set_ivars(tmpd, &xlr_board_info.xlr_i2c_device[I2C_RTC]);
}
if(xlr_board_info.xlr_i2c_device[I2C_THERMAL].enabled == 1) {
tmpd = device_add_child(sc->iicbus, "max6657", 0);
device_set_ivars(tmpd, &xlr_board_info.xlr_i2c_device[I2C_THERMAL]);
}
if(xlr_board_info.xlr_i2c_device[I2C_EEPROM].enabled == 1) {
tmpd = device_add_child(sc->iicbus, "at24co2n", 0);
device_set_ivars(tmpd, &xlr_board_info.xlr_i2c_device[I2C_EEPROM]);
}
bus_generic_attach(dev);
@ -334,19 +212,6 @@ xlr_i2c_detach(device_t dev)
return (0);
}
/*
static int
xlr_i2c_add_child(device_t dev, int order, const char *name, int unit)
{
printf("********* %s ******** \n", __FUNCTION__);
device_add_child_ordered(dev, order, name, unit);
bus_generic_attach(dev);
return (0);
}
*/
static int
xlr_i2c_start(device_t dev, u_char slave, int timeout)
{
@ -354,9 +219,9 @@ xlr_i2c_start(device_t dev, u_char slave, int timeout)
struct xlr_i2c_softc *sc;
sc = device_get_softc(dev);
mtx_lock(&sc->sc_mtx);
sc->sc_started = 1;
current_slave = (slave >> 1);
sc->i2cdev_addr = (slave >> 1);
return error;
}
@ -365,7 +230,10 @@ static int
xlr_i2c_stop(device_t dev)
{
int error = 0;
struct xlr_i2c_softc *sc;
sc = device_get_softc(dev);
mtx_unlock(&sc->sc_mtx);
return error;
}
@ -374,51 +242,106 @@ static int
xlr_i2c_read(device_t dev, char *buf, int len, int *read, int last,
int delay)
{
int error = 0;
volatile uint32_t i2c_status = 0;
int pos=0;
int timeout = 0;
if (palm_addr_only(current_slave, read_address) == -1) {
printf("I2C ADDRONLY Phase Fail.\n");
xlr_i2c_dev_write(dev, XLR_I2C_CFG, XLR_I2C_CFG_NOADDR);
xlr_i2c_dev_write(dev, XLR_I2C_BYTECNT, len);
retry:
xlr_i2c_dev_write(dev, XLR_I2C_STARTXFR, XLR_I2C_STARTXFR_RD);
timeout = 0;
while(1) {
if(timeout++ > MAXTIME)
return -1;
i2c_status = xlr_i2c_dev_read(dev, XLR_I2C_STATUS);
if (i2c_status & XLR_I2C_RXRDY)
buf[pos++] = (uint8_t) xlr_i2c_dev_read(dev, XLR_I2C_DATAIN);
/* ACKERR -- bail */
if (i2c_status & XLR_I2C_ACK_ERR)
return -1; /* ACK_ERROR */
/* LOST ARB or STARTERR -- repeat */
if (i2c_status & XLR_I2C_ARB_STARTERR)
goto retry;
/* Wait for busy bit to go away */
if (i2c_status & XLR_I2C_BUS_BUSY)
continue;
if (pos == len)
break;
}
if (palm_rx(current_slave, read_address, len, buf) == -1) {
printf("I2C Read Fail.\n");
return -1;
}
*read = len;
return error;
*read = pos;
return 0;
}
static int
xlr_i2c_write(device_t dev, char *buf, int len, int *sent, int timeout /* us */ )
xlr_i2c_write(device_t dev, const char *buf, int len, int *sent, int timeout /* us */ )
{
volatile uint32_t i2c_status = 0x00;
uint8_t devaddr, addr;
struct xlr_i2c_softc *sc;
int pos;
int error = 0;
uint8_t write_address;
sc = device_get_softc(dev);
if (len == 1) {
/* address for the next read */
read_address = buf[0];
return error;
/* the first byte of write is addr (of register in device) */
addr = buf[0];
devaddr = sc->i2cdev_addr;
xlr_i2c_dev_write(dev, XLR_I2C_ADDR, addr);
xlr_i2c_dev_write(dev, XLR_I2C_DEVADDR, devaddr);
xlr_i2c_dev_write(dev, XLR_I2C_CFG, XLR_I2C_CFG_ADDR);
xlr_i2c_dev_write(dev, XLR_I2C_BYTECNT, len - 1);
retry:
pos = 1;
if (len == 1) /* there is no data only address */
xlr_i2c_dev_write(dev, XLR_I2C_STARTXFR, XLR_I2C_STARTXFR_ND);
else {
xlr_i2c_dev_write(dev, XLR_I2C_STARTXFR, XLR_I2C_STARTXFR_WR);
xlr_i2c_dev_write(dev, XLR_I2C_DATAOUT, buf[pos]);
}
if (len < 2)
return (-1);
write_address = buf[0];
while (1) {
i2c_status = xlr_i2c_dev_read(dev, XLR_I2C_STATUS);
/*
* for write operation, buf[0] contains the register offset and
* buf[1] onwards contains the value
*/
palm_tx(current_slave, write_address, &buf[1], len - 1);
/* sdo empty send next byte */
if (i2c_status & XLR_I2C_SDOEMPTY) {
pos++;
xlr_i2c_dev_write(dev, XLR_I2C_DATAOUT, buf[pos]);
}
return error;
/* LOST ARB or STARTERR -- repeat */
if (i2c_status & XLR_I2C_ARB_STARTERR)
goto retry;
/* ACKERR -- bail */
if (i2c_status & XLR_I2C_ACK_ERR) {
printf("ACK ERR : exiting\n ");
return -1;
}
/* busy try again */
if (i2c_status & XLR_I2C_BUS_BUSY)
continue;
if (pos >= len)
break;;
}
*sent = len - 1;
return 0;
}
static int
xlr_i2c_callback(device_t dev, int index, caddr_t *data)
xlr_i2c_callback(device_t dev, int index, caddr_t data)
{
return 0;
}
@ -429,6 +352,32 @@ xlr_i2c_repeated_start(device_t dev, u_char slave, int timeout)
return 0;
}
/*
* I2C bus transfer for RMI boards and devices.
* Generic version of iicbus_transfer that calls the appropriate
* routines to accomplish this. See note above about acceptable
* buffer addresses.
*/
int
xlr_i2c_transfer(device_t bus, struct iic_msg *msgs, uint32_t nmsgs)
{
int i, error, lenread, lenwrote;
u_char addr;
addr = msgs[0].slave | LSB;
error = xlr_i2c_start(bus, addr, 0);
for (i = 0, error = 0; i < nmsgs && error == 0; i++) {
if (msgs[i].flags & IIC_M_RD) {
error = xlr_i2c_read((bus), msgs[i].buf, msgs[i].len, &lenread, IIC_LAST_READ, 0);
}
else {
error = xlr_i2c_write((bus), msgs[i].buf, msgs[i].len, &lenwrote, 0);
}
}
error = xlr_i2c_stop(bus);
return (error);
}
static device_method_t xlr_i2c_methods[] = {
/* device interface */
@ -443,6 +392,7 @@ static device_method_t xlr_i2c_methods[] = {
DEVMETHOD(iicbus_stop, xlr_i2c_stop),
DEVMETHOD(iicbus_write, xlr_i2c_write),
DEVMETHOD(iicbus_read, xlr_i2c_read),
DEVMETHOD(iicbus_transfer, xlr_i2c_transfer),
{0, 0}
};
@ -453,3 +403,4 @@ static driver_t xlr_i2c_driver = {
};
DRIVER_MODULE(xlr_i2c, iodi, xlr_i2c_driver, xlr_i2c_devclass, 0, 0);
DRIVER_MODULE(iicbus, xlr_i2c, iicbus_driver, iicbus_devclass, 0, 0);