[PATCH kernel-hwmon-occ 01/10] initial check in
OpenBMC Patches
openbmc-patches at stwcx.xyz
Thu Nov 12 21:20:03 AEDT 2015
From: liyi <adamliyi at msn.com>
---
COPYING | 340 ++++++++++++++++++++++++
Makefile | 14 +
occ-i2c.c | 880 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
3 files changed, 1234 insertions(+)
create mode 100644 COPYING
create mode 100644 Makefile
create mode 100644 occ-i2c.c
diff --git a/COPYING b/COPYING
new file mode 100644
index 0000000..6d45519
--- /dev/null
+++ b/COPYING
@@ -0,0 +1,340 @@
+ GNU GENERAL PUBLIC LICENSE
+ Version 2, June 1991
+
+ Copyright (C) 1989, 1991 Free Software Foundation, Inc.
+ 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
+ Everyone is permitted to copy and distribute verbatim copies
+ of this license document, but changing it is not allowed.
+
+ Preamble
+
+ The licenses for most software are designed to take away your
+freedom to share and change it. By contrast, the GNU General Public
+License is intended to guarantee your freedom to share and change free
+software--to make sure the software is free for all its users. This
+General Public License applies to most of the Free Software
+Foundation's software and to any other program whose authors commit to
+using it. (Some other Free Software Foundation software is covered by
+the GNU Library General Public License instead.) You can apply it to
+your programs, too.
+
+ When we speak of free software, we are referring to freedom, not
+price. Our General Public Licenses are designed to make sure that you
+have the freedom to distribute copies of free software (and charge for
+this service if you wish), that you receive source code or can get it
+if you want it, that you can change the software or use pieces of it
+in new free programs; and that you know you can do these things.
+
+ To protect your rights, we need to make restrictions that forbid
+anyone to deny you these rights or to ask you to surrender the rights.
+These restrictions translate to certain responsibilities for you if you
+distribute copies of the software, or if you modify it.
+
+ For example, if you distribute copies of such a program, whether
+gratis or for a fee, you must give the recipients all the rights that
+you have. You must make sure that they, too, receive or can get the
+source code. And you must show them these terms so they know their
+rights.
+
+ We protect your rights with two steps: (1) copyright the software, and
+(2) offer you this license which gives you legal permission to copy,
+distribute and/or modify the software.
+
+ Also, for each author's protection and ours, we want to make certain
+that everyone understands that there is no warranty for this free
+software. If the software is modified by someone else and passed on, we
+want its recipients to know that what they have is not the original, so
+that any problems introduced by others will not reflect on the original
+authors' reputations.
+
+ Finally, any free program is threatened constantly by software
+patents. We wish to avoid the danger that redistributors of a free
+program will individually obtain patent licenses, in effect making the
+program proprietary. To prevent this, we have made it clear that any
+patent must be licensed for everyone's free use or not licensed at all.
+
+ The precise terms and conditions for copying, distribution and
+modification follow.
+
+ GNU GENERAL PUBLIC LICENSE
+ TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION
+
+ 0. This License applies to any program or other work which contains
+a notice placed by the copyright holder saying it may be distributed
+under the terms of this General Public License. The "Program", below,
+refers to any such program or work, and a "work based on the Program"
+means either the Program or any derivative work under copyright law:
+that is to say, a work containing the Program or a portion of it,
+either verbatim or with modifications and/or translated into another
+language. (Hereinafter, translation is included without limitation in
+the term "modification".) Each licensee is addressed as "you".
+
+Activities other than copying, distribution and modification are not
+covered by this License; they are outside its scope. The act of
+running the Program is not restricted, and the output from the Program
+is covered only if its contents constitute a work based on the
+Program (independent of having been made by running the Program).
+Whether that is true depends on what the Program does.
+
+ 1. You may copy and distribute verbatim copies of the Program's
+source code as you receive it, in any medium, provided that you
+conspicuously and appropriately publish on each copy an appropriate
+copyright notice and disclaimer of warranty; keep intact all the
+notices that refer to this License and to the absence of any warranty;
+and give any other recipients of the Program a copy of this License
+along with the Program.
+
+You may charge a fee for the physical act of transferring a copy, and
+you may at your option offer warranty protection in exchange for a fee.
+
+ 2. You may modify your copy or copies of the Program or any portion
+of it, thus forming a work based on the Program, and copy and
+distribute such modifications or work under the terms of Section 1
+above, provided that you also meet all of these conditions:
+
+ a) You must cause the modified files to carry prominent notices
+ stating that you changed the files and the date of any change.
+
+ b) You must cause any work that you distribute or publish, that in
+ whole or in part contains or is derived from the Program or any
+ part thereof, to be licensed as a whole at no charge to all third
+ parties under the terms of this License.
+
+ c) If the modified program normally reads commands interactively
+ when run, you must cause it, when started running for such
+ interactive use in the most ordinary way, to print or display an
+ announcement including an appropriate copyright notice and a
+ notice that there is no warranty (or else, saying that you provide
+ a warranty) and that users may redistribute the program under
+ these conditions, and telling the user how to view a copy of this
+ License. (Exception: if the Program itself is interactive but
+ does not normally print such an announcement, your work based on
+ the Program is not required to print an announcement.)
+
+These requirements apply to the modified work as a whole. If
+identifiable sections of that work are not derived from the Program,
+and can be reasonably considered independent and separate works in
+themselves, then this License, and its terms, do not apply to those
+sections when you distribute them as separate works. But when you
+distribute the same sections as part of a whole which is a work based
+on the Program, the distribution of the whole must be on the terms of
+this License, whose permissions for other licensees extend to the
+entire whole, and thus to each and every part regardless of who wrote it.
+
+Thus, it is not the intent of this section to claim rights or contest
+your rights to work written entirely by you; rather, the intent is to
+exercise the right to control the distribution of derivative or
+collective works based on the Program.
+
+In addition, mere aggregation of another work not based on the Program
+with the Program (or with a work based on the Program) on a volume of
+a storage or distribution medium does not bring the other work under
+the scope of this License.
+
+ 3. You may copy and distribute the Program (or a work based on it,
+under Section 2) in object code or executable form under the terms of
+Sections 1 and 2 above provided that you also do one of the following:
+
+ a) Accompany it with the complete corresponding machine-readable
+ source code, which must be distributed under the terms of Sections
+ 1 and 2 above on a medium customarily used for software interchange; or,
+
+ b) Accompany it with a written offer, valid for at least three
+ years, to give any third party, for a charge no more than your
+ cost of physically performing source distribution, a complete
+ machine-readable copy of the corresponding source code, to be
+ distributed under the terms of Sections 1 and 2 above on a medium
+ customarily used for software interchange; or,
+
+ c) Accompany it with the information you received as to the offer
+ to distribute corresponding source code. (This alternative is
+ allowed only for noncommercial distribution and only if you
+ received the program in object code or executable form with such
+ an offer, in accord with Subsection b above.)
+
+The source code for a work means the preferred form of the work for
+making modifications to it. For an executable work, complete source
+code means all the source code for all modules it contains, plus any
+associated interface definition files, plus the scripts used to
+control compilation and installation of the executable. However, as a
+special exception, the source code distributed need not include
+anything that is normally distributed (in either source or binary
+form) with the major components (compiler, kernel, and so on) of the
+operating system on which the executable runs, unless that component
+itself accompanies the executable.
+
+If distribution of executable or object code is made by offering
+access to copy from a designated place, then offering equivalent
+access to copy the source code from the same place counts as
+distribution of the source code, even though third parties are not
+compelled to copy the source along with the object code.
+
+ 4. You may not copy, modify, sublicense, or distribute the Program
+except as expressly provided under this License. Any attempt
+otherwise to copy, modify, sublicense or distribute the Program is
+void, and will automatically terminate your rights under this License.
+However, parties who have received copies, or rights, from you under
+this License will not have their licenses terminated so long as such
+parties remain in full compliance.
+
+ 5. You are not required to accept this License, since you have not
+signed it. However, nothing else grants you permission to modify or
+distribute the Program or its derivative works. These actions are
+prohibited by law if you do not accept this License. Therefore, by
+modifying or distributing the Program (or any work based on the
+Program), you indicate your acceptance of this License to do so, and
+all its terms and conditions for copying, distributing or modifying
+the Program or works based on it.
+
+ 6. Each time you redistribute the Program (or any work based on the
+Program), the recipient automatically receives a license from the
+original licensor to copy, distribute or modify the Program subject to
+these terms and conditions. You may not impose any further
+restrictions on the recipients' exercise of the rights granted herein.
+You are not responsible for enforcing compliance by third parties to
+this License.
+
+ 7. If, as a consequence of a court judgment or allegation of patent
+infringement or for any other reason (not limited to patent issues),
+conditions are imposed on you (whether by court order, agreement or
+otherwise) that contradict the conditions of this License, they do not
+excuse you from the conditions of this License. If you cannot
+distribute so as to satisfy simultaneously your obligations under this
+License and any other pertinent obligations, then as a consequence you
+may not distribute the Program at all. For example, if a patent
+license would not permit royalty-free redistribution of the Program by
+all those who receive copies directly or indirectly through you, then
+the only way you could satisfy both it and this License would be to
+refrain entirely from distribution of the Program.
+
+If any portion of this section is held invalid or unenforceable under
+any particular circumstance, the balance of the section is intended to
+apply and the section as a whole is intended to apply in other
+circumstances.
+
+It is not the purpose of this section to induce you to infringe any
+patents or other property right claims or to contest validity of any
+such claims; this section has the sole purpose of protecting the
+integrity of the free software distribution system, which is
+implemented by public license practices. Many people have made
+generous contributions to the wide range of software distributed
+through that system in reliance on consistent application of that
+system; it is up to the author/donor to decide if he or she is willing
+to distribute software through any other system and a licensee cannot
+impose that choice.
+
+This section is intended to make thoroughly clear what is believed to
+be a consequence of the rest of this License.
+
+ 8. If the distribution and/or use of the Program is restricted in
+certain countries either by patents or by copyrighted interfaces, the
+original copyright holder who places the Program under this License
+may add an explicit geographical distribution limitation excluding
+those countries, so that distribution is permitted only in or among
+countries not thus excluded. In such case, this License incorporates
+the limitation as if written in the body of this License.
+
+ 9. The Free Software Foundation may publish revised and/or new versions
+of the General Public License from time to time. Such new versions will
+be similar in spirit to the present version, but may differ in detail to
+address new problems or concerns.
+
+Each version is given a distinguishing version number. If the Program
+specifies a version number of this License which applies to it and "any
+later version", you have the option of following the terms and conditions
+either of that version or of any later version published by the Free
+Software Foundation. If the Program does not specify a version number of
+this License, you may choose any version ever published by the Free Software
+Foundation.
+
+ 10. If you wish to incorporate parts of the Program into other free
+programs whose distribution conditions are different, write to the author
+to ask for permission. For software which is copyrighted by the Free
+Software Foundation, write to the Free Software Foundation; we sometimes
+make exceptions for this. Our decision will be guided by the two goals
+of preserving the free status of all derivatives of our free software and
+of promoting the sharing and reuse of software generally.
+
+ NO WARRANTY
+
+ 11. BECAUSE THE PROGRAM IS LICENSED FREE OF CHARGE, THERE IS NO WARRANTY
+FOR THE PROGRAM, TO THE EXTENT PERMITTED BY APPLICABLE LAW. EXCEPT WHEN
+OTHERWISE STATED IN WRITING THE COPYRIGHT HOLDERS AND/OR OTHER PARTIES
+PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESSED
+OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. THE ENTIRE RISK AS
+TO THE QUALITY AND PERFORMANCE OF THE PROGRAM IS WITH YOU. SHOULD THE
+PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF ALL NECESSARY SERVICING,
+REPAIR OR CORRECTION.
+
+ 12. IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING
+WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MAY MODIFY AND/OR
+REDISTRIBUTE THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES,
+INCLUDING ANY GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING
+OUT OF THE USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED
+TO LOSS OF DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY
+YOU OR THIRD PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER
+PROGRAMS), EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE
+POSSIBILITY OF SUCH DAMAGES.
+
+ END OF TERMS AND CONDITIONS
+
+ How to Apply These Terms to Your New Programs
+
+ If you develop a new program, and you want it to be of the greatest
+possible use to the public, the best way to achieve this is to make it
+free software which everyone can redistribute and change under these terms.
+
+ To do so, attach the following notices to the program. It is safest
+to attach them to the start of each source file to most effectively
+convey the exclusion of warranty; and each file should have at least
+the "copyright" line and a pointer to where the full notice is found.
+
+ <one line to give the program's name and a brief idea of what it does.>
+ Copyright (C) <year> <name of author>
+
+ This program is free software; you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation; either version 2 of the License, or
+ (at your option) any later version.
+
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program; if not, write to the Free Software
+ Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
+
+
+Also add information on how to contact you by electronic and paper mail.
+
+If the program is interactive, make it output a short notice like this
+when it starts in an interactive mode:
+
+ Gnomovision version 69, Copyright (C) year name of author
+ Gnomovision comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
+ This is free software, and you are welcome to redistribute it
+ under certain conditions; type `show c' for details.
+
+The hypothetical commands `show w' and `show c' should show the appropriate
+parts of the General Public License. Of course, the commands you use may
+be called something other than `show w' and `show c'; they could even be
+mouse-clicks or menu items--whatever suits your program.
+
+You should also get your employer (if you work as a programmer) or your
+school, if any, to sign a "copyright disclaimer" for the program, if
+necessary. Here is a sample; alter the names:
+
+ Yoyodyne, Inc., hereby disclaims all copyright interest in the program
+ `Gnomovision' (which makes passes at compilers) written by James Hacker.
+
+ <signature of Ty Coon>, 1 April 1989
+ Ty Coon, President of Vice
+
+This General Public License does not permit incorporating your program into
+proprietary programs. If your program is a subroutine library, you may
+consider it more useful to permit linking proprietary applications with the
+library. If this is what you want to do, use the GNU Library General
+Public License instead of this License.
diff --git a/Makefile b/Makefile
new file mode 100644
index 0000000..cd9fcba
--- /dev/null
+++ b/Makefile
@@ -0,0 +1,14 @@
+obj-m := occ-i2c.o
+
+SRC := $(shell pwd)
+
+all:
+ $(MAKE) -C $(KERNEL_SRC) M=$(SRC)
+
+modules_install:
+ $(MAKE) -C $(KERNEL_SRC) M=$(SRC) modules_install
+
+clean:
+ rm -f *.o *~ core .depend .*.cmd *.ko *.mod.c
+ rm -f Module.markers Module.symvers modules.order
+ rm -rf .tmp_versions Modules.symvers
diff --git a/occ-i2c.c b/occ-i2c.c
new file mode 100644
index 0000000..b5247d6
--- /dev/null
+++ b/occ-i2c.c
@@ -0,0 +1,880 @@
+/*
+ * BMC OCC HWMON driver - read Power8 OCC (On Chip Controller) sensor data via i2c.
+ *
+ * Copyright (c) 2015 IBM (Alvin Wang, Li Yi)
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/slab.h>
+#include <linux/jiffies.h>
+#include <linux/i2c.h>
+#include <linux/hwmon.h>
+#include <linux/hwmon-sysfs.h>
+#include <linux/err.h>
+#include <linux/mutex.h>
+#include <linux/of.h>
+
+#define DEBUG 1
+
+/* ------------------------------------------------------------*/
+/* OCC sensor data format */
+typedef struct {
+ uint16_t sensor_id;
+ uint16_t value;
+} occ_sensor;
+
+typedef struct {
+ uint16_t sensor_id;
+ uint32_t update_tag;
+ uint32_t accumulator;
+ uint16_t value;
+} powr_sensor;
+
+
+typedef struct {
+ char sensor_type[5];
+ uint8_t reserved0;
+ uint8_t sensor_format;
+ uint8_t sensor_length;
+ uint8_t num_of_sensors;
+ occ_sensor *sensor;
+ powr_sensor *powr;
+} sensor_data_block;
+
+typedef struct {
+ uint8_t status;
+ uint8_t ext_status;
+ uint8_t occs_present;
+ uint8_t config;
+ uint8_t occ_state;
+ uint8_t reserved0;
+ uint8_t reserved1;
+ uint8_t error_log_id;
+ uint32_t error_log_addr_start;
+ uint16_t error_log_length;
+ uint8_t reserved2;
+ uint8_t reserved3;
+ char occ_code_level[17];
+ char sensor_eye_catcher[7];
+ uint8_t num_of_sensor_blocks;
+ uint8_t sensor_data_version;
+ sensor_data_block* blocks;
+} occ_poll_data;
+
+typedef struct {
+ uint8_t sequence_num;
+ uint8_t cmd_type;
+ uint8_t rtn_status;
+ uint16_t data_length;
+ occ_poll_data data;
+ uint16_t chk_sum;
+ uint16_t temp_block_id;
+ uint16_t freq_block_id;
+ uint16_t power_block_id;
+} occ_response_t;
+
+static occ_response_t occ_resp;
+
+/* Each client has this additional data */
+struct occ_drv_data {
+ struct i2c_client *client;
+ struct device *hwmon_dev;
+ struct mutex update_lock;
+ char valid; /* !=0 if sensor data are valid */
+ unsigned long last_updated; /* In jiffies */
+ unsigned long sample_time; /* In jiffies */
+ occ_response_t *occ_resp;
+};
+
+/*-----------------------------------------------------------------------*/
+/* i2c read and write occ sensors */
+
+#define OCC_DATA_MAX 4096 /* 4KB at most */
+#define I2C_STATUS_REG 0x000d0001
+#define I2C_ERROR_REG 0x000d0002
+#define I2C_READ_ERROR 1
+#define I2C_WRITE_ERROR 2
+#define I2C_DATABUFFER_SIZE_ERROR 3
+
+#define SCOM_OCC_SRAM_WOX 0x0006B013
+#define SCOM_OCC_SRAM_WAND 0x0006B012
+#define SCOM_OCC_SRAM_ADDR 0x0006B010
+#define SCOM_OCC_SRAM_DATA 0x0006B015
+#define OCC_COMMAND_ADDR 0xFFFF6000
+#define OCC_RESPONSE_ADDR 0xFFFF7000
+
+static int deinit_occ_resp_buf(occ_response_t *p)
+{
+ int b;
+
+ if (p == NULL)
+ return 0;
+
+ if (p->data.blocks == NULL)
+ return 0;
+
+ for(b = 0; b < p->data.num_of_sensor_blocks; b++) {
+ if (!p->data.blocks[b].sensor)
+ kfree(p->data.blocks[b].sensor);
+ if (!p->data.blocks[b].powr)
+ kfree(p->data.blocks[b].powr);
+ }
+
+ kfree(p->data.blocks);
+
+ memset(p, 0, sizeof(*p));
+
+ return 0;
+}
+
+static ssize_t occ_i2c_read(struct i2c_client *client, char *buf, size_t count)
+{
+ int ret = 0;
+
+ if (count > 8192)
+ count = 8192;
+
+ pr_debug("i2c_read: reading %zu bytes.\n", count);
+ ret = i2c_master_recv(client, buf, count);
+ return ret;
+}
+
+static ssize_t occ_i2c_write(struct i2c_client *client, const char *buf, size_t count)
+{
+ int ret = 0;
+
+ if (count > 8192)
+ count = 8192;
+
+ pr_debug("i2c_write: writing %zu bytes.\n", count);
+ ret = i2c_master_send(client, buf, count);
+ return ret;
+}
+
+/* read two 4-byte value */
+static int occ_getscom(struct i2c_client *client, uint32_t address, uint32_t *value0, uint32_t *value1)
+{
+ uint32_t ret = 0;
+ char buf[8];
+ const char* address_buf = (const char*)&address;
+
+ //P8 i2c slave requires address to be shifted by 1
+ address = address << 1;
+
+ ret = occ_i2c_write(client, address_buf, sizeof(address));
+ if (ret != sizeof(address))
+ return -I2C_WRITE_ERROR;
+
+ ret = occ_i2c_read(client, buf, sizeof(buf));
+ if (ret != sizeof(buf))
+ return -I2C_READ_ERROR;
+
+ memcpy(value1, &buf[0], sizeof(*value1));
+ memcpy(value0, &buf[4], sizeof(*value0));
+
+ return 0;
+}
+
+/* read 8-byte value and put into data[offset] */
+static int occ_getscomb(struct i2c_client *client, uint32_t address, char* data, int offset)
+{
+ uint32_t ret = 0;
+ const char* address_buf = (const char*)&address;
+ char buf[8];
+ int b = 0;
+
+ //P8 i2c slave requires address to be shifted by 1
+ address = address << 1;
+
+ ret = occ_i2c_write(client, address_buf, sizeof(address));
+ if (ret != sizeof(address))
+ return -I2C_WRITE_ERROR;
+
+ ret = occ_i2c_read(client, buf, sizeof(buf));
+ if (ret != sizeof(buf))
+ return -I2C_READ_ERROR;
+
+ for (b = 0; b < 8; b++) {
+ data[offset + b] = buf[7 - b];
+ }
+
+ return 0;
+}
+
+static int occ_putscom(struct i2c_client *client, uint32_t address, uint32_t data0, uint32_t data1)
+{
+ const char* address_buf = (const char*)&address;
+ const char* d0 = (const char*)&data0;
+ const char* d1 = (const char*)&data1;
+ char buf[12];
+ uint32_t ret = 0;
+
+ //P8 i2c slave requires address to be shifted by 1
+ address = address << 1;
+
+ memcpy(&buf[0], address_buf, sizeof(address));
+ memcpy(&buf[4], d1, sizeof(data1));
+ memcpy(&buf[8], d0, sizeof(data0));
+
+ ret = occ_i2c_write(client, buf, sizeof(buf));
+ if (ret != sizeof(buf))
+ return I2C_WRITE_ERROR;
+
+ return 0;
+}
+
+static int occ_check_i2c_errors(struct i2c_client *client)
+{
+ uint32_t v0;
+ uint32_t v1;
+
+ occ_getscom(client, I2C_STATUS_REG, &v0, &v1);
+ if (v0 != 0x80000000) {
+ printk("ERROR present in P8 I2C Slave. Clearing...\n");
+ occ_putscom(client, I2C_ERROR_REG, 0x00000000, 0x00000000);
+ occ_putscom(client, I2C_STATUS_REG, 0x00000000, 0x00000000);
+ return -1;
+ }
+
+ return 0;
+}
+
+
+static inline uint16_t get_occdata_length(char* d)
+{
+ uint16_t data_length = 0;
+
+ data_length = d[3] << 8;
+ data_length = data_length | d[4];
+ return data_length;
+}
+
+
+static int parse_occ_response(char* d, occ_response_t* o)
+{
+ int b = 0;
+ int s = 0;
+ int ret = 0;
+ int dnum = 45;
+
+ o->sequence_num = d[0];
+ o->cmd_type = d[1];
+ o->rtn_status = d[2];
+ o->data_length = d[3] << 8;
+ o->data_length = o->data_length | d[4];
+ o->data.status = d[5];
+ o->data.ext_status = d[6];
+ o->data.occs_present = d[7];
+ o->data.config = d[8];
+ o->data.occ_state = d[9];
+ o->data.reserved0 = d[10];
+ o->data.reserved1 = d[11];
+ o->data.error_log_id = d[12];
+ o->data.error_log_addr_start = d[13] << 24;
+ o->data.error_log_addr_start = o->data.error_log_addr_start | d[14] << 16;
+ o->data.error_log_addr_start = o->data.error_log_addr_start | d[15] << 8;
+ o->data.error_log_addr_start = o->data.error_log_addr_start | d[16];
+ o->data.error_log_length = d[17] << 8;
+ o->data.error_log_length = o->data.error_log_length | d[18];
+ o->data.reserved2 = d[19];
+ o->data.reserved3 = d[20];
+ strncpy(&o->data.occ_code_level[0], (const char*)&d[21], 16);
+ strncpy(&o->data.sensor_eye_catcher[0], (const char*)&d[37], 6);
+ o->data.sensor_eye_catcher[6]='\0';
+ o->data.num_of_sensor_blocks=d[43];
+ o->data.sensor_data_version = d[44];
+
+ if (strcmp(o->data.sensor_eye_catcher, "SENSOR") != 0) {
+ printk("ERROR: SENSOR not found at byte 37 (%s)\n",o->data.sensor_eye_catcher);
+ return -1;
+ }
+
+ if (o->data.num_of_sensor_blocks == 0) {
+ printk("ERROR: SENSOR block num is 0\n");
+ return -1;
+ }
+
+ o->data.blocks = kzalloc(sizeof(sensor_data_block) * o->data.num_of_sensor_blocks, GFP_KERNEL);
+ if (o->data.blocks == NULL)
+ return -ENOMEM;
+
+ printk("Reading %d sensor blocks\n", o->data.num_of_sensor_blocks);
+ for(b = 0; b < o->data.num_of_sensor_blocks; b++) {
+ /* 8-byte sensor block head */
+ strncpy(&o->data.blocks[b].sensor_type[0], (const char*)&d[dnum], 4);
+ o->data.blocks[b].reserved0 = d[dnum+4];
+ o->data.blocks[b].sensor_format = d[dnum+5];
+ o->data.blocks[b].sensor_length = d[dnum+6];
+ o->data.blocks[b].num_of_sensors = d[dnum+7];
+ dnum = dnum + 8;
+
+ printk("sensor block[%d]: type: %s, num_of_sensors: %d, sensor_length: %u\n",
+ b, o->data.blocks[b].sensor_type, o->data.blocks[b].num_of_sensors,
+ o->data.blocks[b].sensor_length);
+
+ /* empty sensor block */
+ if (o->data.blocks[b].num_of_sensors <= 0)
+ continue;
+ if (o->data.blocks[b].sensor_length == 0)
+ continue;
+
+ if (strcmp(o->data.blocks[b].sensor_type, "FREQ") == 0) {
+ o->data.blocks[b].sensor =
+ kzalloc(sizeof(occ_sensor) * o->data.blocks[b].num_of_sensors, GFP_KERNEL);
+
+ if (o->data.blocks[b].sensor == NULL) {
+ ret = -ENOMEM;
+ goto abort;
+ }
+ o->freq_block_id = b;
+ for (s = 0; s < o->data.blocks[b].num_of_sensors; s++) {
+ o->data.blocks[b].sensor[s].sensor_id = d[dnum] << 8;
+ o->data.blocks[b].sensor[s].sensor_id =
+ o->data.blocks[b].sensor[s].sensor_id | d[dnum+1];
+ o->data.blocks[b].sensor[s].value = d[dnum+2] << 8;
+ o->data.blocks[b].sensor[s].value = o->data.blocks[b].sensor[s].value | d[dnum+3];
+ printk("sensor[%d]-[%d]: id: %u, value: %u\n",
+ b, s, o->data.blocks[b].sensor[s].sensor_id, o->data.blocks[b].sensor[s].value);
+ dnum = dnum + o->data.blocks[b].sensor_length;
+ }
+ }
+ else if (strcmp(o->data.blocks[b].sensor_type, "TEMP") == 0) {
+
+ o->data.blocks[b].sensor =
+ kzalloc(sizeof(occ_sensor) * o->data.blocks[b].num_of_sensors, GFP_KERNEL);
+
+ if (o->data.blocks[b].sensor == NULL) {
+ ret = -ENOMEM;
+ goto abort;
+ }
+
+ o->temp_block_id = b;
+ for (s = 0; s < o->data.blocks[b].num_of_sensors; s++) {
+ o->data.blocks[b].sensor[s].sensor_id = d[dnum] << 8;
+ o->data.blocks[b].sensor[s].sensor_id =
+ o->data.blocks[b].sensor[s].sensor_id | d[dnum+1];
+ o->data.blocks[b].sensor[s].value = d[dnum+2] << 8;
+ o->data.blocks[b].sensor[s].value = o->data.blocks[b].sensor[s].value | d[dnum+3];
+ printk("sensor[%d]-[%d]: id: %u, value: %u\n",
+ b, s, o->data.blocks[b].sensor[s].sensor_id, o->data.blocks[b].sensor[s].value);
+ dnum = dnum + o->data.blocks[b].sensor_length;
+ }
+ }
+ else if (strcmp(o->data.blocks[b].sensor_type, "POWR") == 0) {
+ o->data.blocks[b].powr =
+ kzalloc(sizeof(powr_sensor) * o->data.blocks[b].num_of_sensors, GFP_KERNEL);
+
+ if (o->data.blocks[b].powr == NULL) {
+ ret = -ENOMEM;
+ goto abort;
+ }
+ o->power_block_id = b;
+ for (s = 0; s< o->data.blocks[b].num_of_sensors; s++) {
+ o->data.blocks[b].powr[s].sensor_id = d[dnum] << 8;
+ o->data.blocks[b].powr[s].sensor_id = o->data.blocks[b].powr[s].sensor_id | d[dnum+1];
+ o->data.blocks[b].powr[s].update_tag = d[dnum+2] << 24;
+ o->data.blocks[b].powr[s].update_tag = o->data.blocks[b].powr[s].update_tag | d[dnum+3] << 16;
+ o->data.blocks[b].powr[s].update_tag = o->data.blocks[b].powr[s].update_tag | d[dnum+4] << 8;
+ o->data.blocks[b].powr[s].update_tag = o->data.blocks[b].powr[s].update_tag | d[dnum+5];
+ o->data.blocks[b].powr[s].accumulator = d[dnum+6] << 24;
+ o->data.blocks[b].powr[s].accumulator = o->data.blocks[b].powr[s].accumulator | d[dnum+7] << 16;
+ o->data.blocks[b].powr[s].accumulator = o->data.blocks[b].powr[s].accumulator | d[dnum+8] << 8;
+ o->data.blocks[b].powr[s].accumulator = o->data.blocks[b].powr[s].accumulator | d[dnum+9];
+ o->data.blocks[b].powr[s].value = d[dnum+10] << 8;
+ o->data.blocks[b].powr[s].value = o->data.blocks[b].powr[s].value | d[dnum+11];
+
+ printk("sensor[%d]-[%d]: id: %u, value: %u\n",
+ b, s, o->data.blocks[b].sensor[s].sensor_id, o->data.blocks[b].sensor[s].value);
+
+ dnum = dnum + o->data.blocks[b].sensor_length;
+ }
+ }
+ else {
+ printk("ERROR: sensor type %s not supported\n", o->data.blocks[b].sensor_type);
+ continue;
+ /* FIX: ignore wrong sensor type? */
+ //ret = -1;
+ //goto abort;
+ }
+ }
+
+ return ret;
+abort:
+ deinit_occ_resp_buf(o);
+ return ret;
+}
+
+char fake_occ_rsp[OCC_DATA_MAX] = {
+0x69, 0x00, 0x00, 0x00, 0xa4, 0xc3, 0x00, 0x03, 0x00, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+0x00, 0x00, 0x00, 0x00, 0x00, 0x6f, 0x70, 0x5f, 0x6f, 0x63, 0x63, 0x5f, 0x31, 0x35, 0x30, 0x37,
+0x31, 0x36, 0x61, 0x00, 0x00, 0x53, 0x45, 0x4e, 0x53, 0x4f, 0x52, 0x04, 0x01, 0x54, 0x45, 0x4d,
+0x50, 0x00, 0x01, 0x04, 0x0a, 0x00 ,0x6a, 0x00, 0x00, 0x00, 0x6c, 0x00, 0x00, 0x00, 0x6d, 0x00,
+0x00,0x00,0x6e,0x00, 0x00,0x00,0x6f,0x00, 0x00,0x00,0x70,0x00, 0x00,0x00,0x71,0x00,
+0x00,0x00,0x73,0x00, 0x00,0x00,0x74,0x00, 0x00,0x00,0x75,0x00, 0x00,0x46,0x52,0x45,
+0x51,0x00,0x01,0x04, 0x0a,0x00,0x76,0x00, 0x00,0x00,0x78,0x00, 0x00,0x00,0x79,0x00,
+0x00,0x00,0x7a,0x00, 0x00,0x00,0x7b,0x00, 0x00,0x00,0x7c,0x00, 0x00,0x00,0x7d,0x00,
+0x00,0x00,0x7f,0x00, 0x00,0x00,0x80,0x00, 0x00,0x00,0x81,0x00, 0x00,0x50,0x4f,0x57,
+0x52,0x00,0x01,0x0c, 0x00,0x43,0x41,0x50, 0x53,0x00,0x01,0x0c, 0x01,0x00,0x00,0x00,
+0x00,0x04,0xb0,0x09, 0x60,0x04,0x4c,0x00, 0x00,0x17,0xc5,};
+
+static int occ_get_all(struct i2c_client *client, occ_response_t *occ_resp)
+{
+ char occ_data[OCC_DATA_MAX];
+ uint16_t num_bytes = 0;
+ int b = 0;
+ int ret = 0;
+
+ //Procedure to access SRAM where OCC data is located
+ occ_putscom(client, SCOM_OCC_SRAM_WOX, 0x08000000, 0x00000000);
+ occ_putscom(client, SCOM_OCC_SRAM_WAND, 0xFBFFFFFF, 0xFFFFFFFF);
+ occ_putscom(client, SCOM_OCC_SRAM_ADDR, OCC_RESPONSE_ADDR, 0x00000000);
+ occ_putscom(client, SCOM_OCC_SRAM_ADDR, OCC_RESPONSE_ADDR, 0x00000000);
+
+ occ_getscomb(client, SCOM_OCC_SRAM_DATA, occ_data, 0);
+
+ /* FIXME: use fake data to test driver without hw */
+ //printk("i2c-occ: using FAKE occ data\n");
+ //memcpy(&occ_data[0], &fake_occ_rsp[0], sizeof(occ_data));
+
+ num_bytes = get_occdata_length(occ_data);
+
+ printk("OCC data length: %d\n", num_bytes);
+
+ if (num_bytes > OCC_DATA_MAX) {
+ printk("ERROR: OCC data length must be < 4KB\n");
+ /* yi: debug */
+ return -1;
+ }
+
+ if (num_bytes <= 0) {
+ printk("ERROR: OCC data length is zero\n");
+ return -1;
+ }
+
+ for (b = 8; b < num_bytes; b = b + 8) {
+ occ_getscomb(client, SCOM_OCC_SRAM_DATA, occ_data, b);
+ }
+
+ /* FIXME: use fake data to test driver without hw */
+ //memcpy(&occ_data[0], &fake_occ_rsp[0], sizeof(occ_data));
+
+ ret = parse_occ_response(occ_data, occ_resp);
+
+ return ret;
+}
+
+
+static int occ_update_device(struct device *dev)
+{
+ struct occ_drv_data *data = dev_get_drvdata(dev);
+ struct i2c_client *client = data->client;
+ int ret = 0;
+
+ mutex_lock(&data->update_lock);
+
+ if (time_after(jiffies, data->last_updated + data->sample_time)
+ || !data->valid) {
+ dev_dbg(&client->dev, "Starting occ update\n");
+
+ deinit_occ_resp_buf(data->occ_resp);
+
+ ret = occ_get_all(client, data->occ_resp);
+
+ data->last_updated = jiffies;
+ data->valid = 1;
+ }
+ mutex_unlock(&data->update_lock);
+
+ return ret;
+}
+
+/* ----------------------------------------------------------------------*/
+/* sysfs interface */
+
+static int print_occ_resp(char *buf, occ_response_t *p, int index)
+{
+ int i = 0;
+ int j = 0;
+ sensor_data_block *block;
+ occ_sensor *sensor;
+ powr_sensor *powr;
+
+ printk("occ hwmon all: index: %d\n", index);
+ printk("------------- above are debug message, bellow is real output------------\n");
+ sprintf(buf, "Dump all sensor data from OCC - Todo\n");
+
+ return 0;
+#if 0
+ sprintf(buf, "num_of_sensor_blocks: %u\n", p->data.num_of_sensor_blocks);
+ for (i = 0; i < p->data.num_of_sensor_blocks; i++)
+ {
+ block = &p->data.blocks[i];
+ if (block == NULL)
+ continue;
+
+ snprintf(buf, sizeof(block->sensor_type), "sensor_type: %s\n", block->sensor_type);
+ sprintf(buf, "num_of_sensors: %u\n", block->num_of_sensors);
+ sprintf(buf, "sensor_length: %u\n", block->sensor_length);
+
+ if (block->sensor_length == 0)
+ continue;
+
+ if (strcmp(block->sensor_type, "TEMP") == 0)
+ {
+ for (j = 0; j < block->num_of_sensors; j++)
+ {
+ sensor = &block->sensor[j];
+ if (sensor == NULL)
+ continue;
+
+ sprintf(buf, "sensor_id: %u\n", sensor->sensor_id);
+ sprintf(buf, "value: %u\n", sensor->value);
+ }
+ }
+
+
+ if (strcmp(block->sensor_type, "FREQ") == 0)
+ {
+ for (j = 0; j < block->num_of_sensors; j++)
+ {
+ sensor = &block->sensor[j];
+ if (sensor == NULL)
+ continue;
+
+ sprintf(buf, "sensor_id: %u\n", sensor->sensor_id);
+ sprintf(buf, "value: %u\n", sensor->value);
+ }
+
+ }
+
+ if (strcmp(block->sensor_type, "POWR") == 0)
+ {
+ for (j = 0; j < block->num_of_sensors; j++)
+ {
+ powr = &block->powr[j];
+ if (powr == NULL)
+ continue;
+
+ sprintf(buf, "sensor_id: %u\n", powr->sensor_id);
+ sprintf(buf, "value: %u\n", powr->value);
+ sprintf(buf, "update_tag: %u\n", powr->update_tag);
+ sprintf(buf, "accumulator: %u\n", powr->accumulator);
+ }
+ }
+ }
+ return 0;
+#endif
+}
+
+/* sysfs attributes for hwmon */
+static ssize_t show_occ_data(struct device *dev, struct device_attribute *da, char *buf)
+{
+ struct sensor_device_attribute *attr = to_sensor_dev_attr(da);
+ int n = attr->index;
+ struct occ_drv_data *data = dev_get_drvdata(dev);
+ int ret = 0;
+
+ ret = occ_update_device(dev);
+
+ if (ret != 0);
+ {
+ /* FIXME: to test fake data */
+ printk("ERROR: cannot get occ sensor data\n");
+ return ret;
+ }
+
+ return print_occ_resp(buf, data->occ_resp, n);
+}
+
+static ssize_t show_occ_temp(struct device *dev, struct device_attribute *da, char *buf)
+{
+ struct sensor_device_attribute *attr = to_sensor_dev_attr(da);
+ int n = attr->index;
+ struct occ_drv_data *data = dev_get_drvdata(dev);
+ int ret = 0;
+ occ_sensor *sensor;
+ int val = 0;
+
+ ret = occ_update_device(dev);
+
+ if (ret != 0);
+ {
+ /* FIXME: to test fake data */
+ printk("ERROR: cannot get occ sensor data\n");
+ return ret;
+ }
+
+ printk("temp_block_id: %d, sensor: %d\n", data->occ_resp->temp_block_id, n -1);
+ sensor = &data->occ_resp->data.blocks[data->occ_resp->temp_block_id].sensor[n - 1];
+ val = sensor->value;
+ printk("temp%d sensor value\n", n, val);
+
+ printk("------------- above are debug message, bellow is real output------------\n");
+ return sprintf(buf, "%d\n", val);
+}
+
+static ssize_t show_occ_temp_label(struct device *dev, struct device_attribute *da, char *buf)
+{
+ struct sensor_device_attribute *attr = to_sensor_dev_attr(da);
+ int n = attr->index;
+ struct occ_drv_data *data = dev_get_drvdata(dev);
+ int ret = 0;
+ occ_sensor *sensor;
+ int val = 0;
+
+ ret = occ_update_device(dev);
+
+ if (ret != 0);
+ {
+ /* FIXME: to test fake data */
+ printk("ERROR: cannot get occ sensor data\n");
+ return ret;
+ }
+
+ sensor = &data->occ_resp->data.blocks[data->occ_resp->temp_block_id].sensor[n - 1];
+ val = sensor->sensor_id;
+ printk("temp%d sensor id\n", n, val);
+ printk("------------- above are debug message, bellow is real output------------\n");
+
+ return sprintf(buf, "sensor id: %d\n", val);
+}
+
+
+static SENSOR_DEVICE_ATTR(all, S_IRUGO, show_occ_data, NULL, 0);
+static SENSOR_DEVICE_ATTR(temp1_input, S_IRUGO, show_occ_temp, NULL, 1);
+static SENSOR_DEVICE_ATTR(temp2_input, S_IRUGO, show_occ_temp, NULL, 2);
+static SENSOR_DEVICE_ATTR(temp3_input, S_IRUGO, show_occ_temp, NULL, 3);
+static SENSOR_DEVICE_ATTR(temp4_input, S_IRUGO, show_occ_temp, NULL, 4);
+static SENSOR_DEVICE_ATTR(temp5_input, S_IRUGO, show_occ_temp, NULL, 5);
+static SENSOR_DEVICE_ATTR(temp6_input, S_IRUGO, show_occ_temp, NULL, 6);
+static SENSOR_DEVICE_ATTR(temp7_input, S_IRUGO, show_occ_temp, NULL, 7);
+static SENSOR_DEVICE_ATTR(temp8_input, S_IRUGO, show_occ_temp, NULL, 8);
+static SENSOR_DEVICE_ATTR(temp9_input, S_IRUGO, show_occ_temp, NULL, 9);
+static SENSOR_DEVICE_ATTR(temp10_input, S_IRUGO, show_occ_temp, NULL, 10);
+static SENSOR_DEVICE_ATTR(temp1_label, S_IRUGO, show_occ_temp_label, NULL, 1);
+static SENSOR_DEVICE_ATTR(temp2_label, S_IRUGO, show_occ_temp_label, NULL, 2);
+static SENSOR_DEVICE_ATTR(temp3_label, S_IRUGO, show_occ_temp_label, NULL, 3);
+static SENSOR_DEVICE_ATTR(temp4_label, S_IRUGO, show_occ_temp_label, NULL, 4);
+static SENSOR_DEVICE_ATTR(temp5_label, S_IRUGO, show_occ_temp_label, NULL, 5);
+static SENSOR_DEVICE_ATTR(temp6_label, S_IRUGO, show_occ_temp_label, NULL, 6);
+static SENSOR_DEVICE_ATTR(temp7_label, S_IRUGO, show_occ_temp_label, NULL, 7);
+static SENSOR_DEVICE_ATTR(temp8_label, S_IRUGO, show_occ_temp_label, NULL, 8);
+static SENSOR_DEVICE_ATTR(temp9_label, S_IRUGO, show_occ_temp_label, NULL, 9);
+static SENSOR_DEVICE_ATTR(temp10_label, S_IRUGO, show_occ_temp_label, NULL, 10);
+
+static struct attribute *occ_attrs[] = {
+ &sensor_dev_attr_all.dev_attr.attr,
+ &sensor_dev_attr_temp1_input.dev_attr.attr,
+ &sensor_dev_attr_temp2_input.dev_attr.attr,
+ &sensor_dev_attr_temp3_input.dev_attr.attr,
+ &sensor_dev_attr_temp4_input.dev_attr.attr,
+ &sensor_dev_attr_temp5_input.dev_attr.attr,
+ &sensor_dev_attr_temp6_input.dev_attr.attr,
+ &sensor_dev_attr_temp7_input.dev_attr.attr,
+ &sensor_dev_attr_temp8_input.dev_attr.attr,
+ &sensor_dev_attr_temp9_input.dev_attr.attr,
+ &sensor_dev_attr_temp10_input.dev_attr.attr,
+ &sensor_dev_attr_temp1_label.dev_attr.attr,
+ &sensor_dev_attr_temp2_label.dev_attr.attr,
+ &sensor_dev_attr_temp3_label.dev_attr.attr,
+ &sensor_dev_attr_temp4_label.dev_attr.attr,
+ &sensor_dev_attr_temp5_label.dev_attr.attr,
+ &sensor_dev_attr_temp6_label.dev_attr.attr,
+ &sensor_dev_attr_temp7_label.dev_attr.attr,
+ &sensor_dev_attr_temp8_label.dev_attr.attr,
+ &sensor_dev_attr_temp9_label.dev_attr.attr,
+ &sensor_dev_attr_temp10_label.dev_attr.attr,
+
+ NULL
+};
+ATTRIBUTE_GROUPS(occ);
+
+/*-----------------------------------------------------------------------*/
+/* device probe and removal */
+
+#define OCC_I2C_ADDR 0x50
+#define OCC_I2C_NAME "occ-i2c"
+
+enum occ_type {
+ occ_id,
+};
+
+
+static int occ_probe(struct i2c_client *client, const struct i2c_device_id *id)
+{
+ struct device *dev = &client->dev;
+ struct occ_drv_data *data;
+ unsigned long funcs;
+
+ data = devm_kzalloc(dev, sizeof(struct occ_drv_data), GFP_KERNEL);
+ if (!data)
+ return -ENOMEM;
+
+ data->client = client;
+ data->occ_resp = &occ_resp;
+ i2c_set_clientdata(client, data);
+ mutex_init(&data->update_lock);
+ data->sample_time = HZ;
+
+ //if (i2cdev_check_addr(client->adapter, OCC_I2C_ADDR))
+ // return -EBUSY;
+
+ client->addr = OCC_I2C_ADDR;
+
+ /* configure the driver */
+ //dev_dbg(dev, "occ i2c register hwmon\n");
+ printk("occ i2c register hwmon\n");
+
+ data->hwmon_dev = hwmon_device_register_with_groups(dev, "occ",
+ data, occ_groups);
+ if (IS_ERR(data->hwmon_dev))
+ return PTR_ERR(data->hwmon_dev);
+
+ //dev_info(dev, "%s: sensor '%s'\n",
+ // dev_name(data->hwmon_dev), client->name);
+ printk("%s: sensor '%s'\n",
+ dev_name(data->hwmon_dev), client->name);
+
+ funcs = i2c_get_functionality(client->adapter);
+
+ dev_info(dev, "i2c adaptor supports function: 0x%lx\n", funcs);
+
+ occ_check_i2c_errors(client);
+ //dev_info(dev, "occ i2c driver ready\n");
+ printk("occ i2c driver ready\n");
+
+ return 0;
+}
+
+static int occ_remove(struct i2c_client *client)
+{
+ struct occ_drv_data *data = i2c_get_clientdata(client);
+
+ /* free allocated sensor memory */
+ deinit_occ_resp_buf(data->occ_resp);
+
+ hwmon_device_unregister(data->hwmon_dev);
+ return 0;
+}
+
+static const struct i2c_device_id occ_ids[] = {
+ { OCC_I2C_NAME, occ_id, },
+ { /* LIST END */ }
+};
+MODULE_DEVICE_TABLE(i2c, occ_ids);
+
+static const struct of_device_id i2c_occ_of_match[] = {
+ {.compatible = "ibm,occ-i2c"},
+ {},
+};
+
+MODULE_DEVICE_TABLE(of, i2c_occ_of_match);
+
+#ifdef CONFIG_PM
+static int occ_suspend(struct device *dev)
+{
+ //struct i2c_client *client = to_i2c_client(dev);
+ /* TODO */
+ return 0;
+}
+
+static int occ_resume(struct device *dev)
+{
+ //struct i2c_client *client = to_i2c_client(dev);
+ /* TODO */
+ return 0;
+}
+
+static const struct dev_pm_ops occ_dev_pm_ops = {
+ .suspend = occ_suspend,
+ .resume = occ_resume,
+};
+#define OCC_DEV_PM_OPS (&occ_dev_pm_ops)
+#else
+#define OCC_DEV_PM_OPS NULL
+#endif /* CONFIG_PM */
+
+static const unsigned short normal_i2c[] = {0x50, I2C_CLIENT_END };
+
+/* Return 0 if detection is successful, -ENODEV otherwise */
+static int occ_detect(struct i2c_client *new_client,
+ struct i2c_board_info *info)
+{
+ strncpy(info->type, OCC_I2C_NAME, sizeof(OCC_I2C_NAME));
+ return 0;
+}
+
+static struct i2c_driver occ_driver = {
+ .class = I2C_CLASS_HWMON,
+ .driver = {
+ .name = OCC_I2C_NAME,
+ .pm = OCC_DEV_PM_OPS,
+ .of_match_table = i2c_occ_of_match,
+ },
+ .probe = occ_probe,
+ .remove = occ_remove,
+ .id_table = occ_ids,
+ .address_list = normal_i2c,
+ .detect = occ_detect,
+};
+
+module_i2c_driver(occ_driver);
+
+#if 0
+
+static struct i2c_board_info my_dev_info[] __initdata = {
+ {
+ I2C_BOARD_INFO(OCC_I2C_NAME, 0x50),
+ },
+};
+
+static struct i2c_client *my_client;
+
+static int occ_init(void)
+{
+ static int sys_adap_bus_num = 3;
+ struct i2c_adapter* adap = i2c_get_adapter(sys_adap_bus_num);
+
+ if(adap==NULL) {
+ printk("[OCC-DEBUG] i2c_get_adapter fail!\n");
+ return -1;
+ }
+
+ my_client = i2c_new_device(adap, &my_dev_info[0]);
+ if( my_client==NULL ){
+ printk("[OCC-DEBUG] i2c_new_device fail!\n");
+ return -1;
+ }
+ i2c_put_adapter(adap);
+ return i2c_add_driver(&occ_driver);
+}
+
+static void __exit occ_exit(void)
+{
+ i2c_unregister_device(my_client);
+ i2c_del_driver(&occ_driver);
+}
+
+module_init(occ_init);
+module_exit(occ_exit);
+
+#endif
+
+MODULE_AUTHOR("Li Yi <shliyi at cn.ibm.com>");
+MODULE_DESCRIPTION("BMC OCC monitor driver");
+MODULE_LICENSE("GPL");
--
2.6.3
More information about the openbmc
mailing list