diff options
Diffstat (limited to 'ANDROID_3.4.5/drivers/i2c/algos')
| -rw-r--r-- | ANDROID_3.4.5/drivers/i2c/algos/Kconfig | 25 | ||||
| -rw-r--r-- | ANDROID_3.4.5/drivers/i2c/algos/Makefile | 10 | ||||
| -rw-r--r-- | ANDROID_3.4.5/drivers/i2c/algos/i2c-algo-bit.c | 671 | ||||
| -rw-r--r-- | ANDROID_3.4.5/drivers/i2c/algos/i2c-algo-pca.c | 566 | ||||
| -rw-r--r-- | ANDROID_3.4.5/drivers/i2c/algos/i2c-algo-pcf.c | 442 | ||||
| -rw-r--r-- | ANDROID_3.4.5/drivers/i2c/algos/i2c-algo-pcf.h | 77 | ||||
| -rwxr-xr-x | ANDROID_3.4.5/drivers/i2c/algos/wmt-i2c-algo.c | 308 |
7 files changed, 0 insertions, 2099 deletions
diff --git a/ANDROID_3.4.5/drivers/i2c/algos/Kconfig b/ANDROID_3.4.5/drivers/i2c/algos/Kconfig deleted file mode 100644 index 39b0ade7..00000000 --- a/ANDROID_3.4.5/drivers/i2c/algos/Kconfig +++ /dev/null @@ -1,25 +0,0 @@ -# -# I2C algorithm drivers configuration -# - -menu "I2C Algorithms" - visible if !I2C_HELPER_AUTO - -config I2C_ALGOBIT - tristate "I2C bit-banging interfaces" - -config I2C_ALGOPCF - tristate "I2C PCF 8584 interfaces" - -config I2C_ALGOPCA - tristate "I2C PCA 9564 interfaces" - -config I2C_ALGOWMT - tristate "WMT I2C Algorithm" - depends on ARCH_WMT && I2C - help - This supports the use of the WMT I2C interface found on WMT - processors. Say Y if you have one of these. You should also say Y - for the WMT I2C peripheral driver support below. - -endmenu diff --git a/ANDROID_3.4.5/drivers/i2c/algos/Makefile b/ANDROID_3.4.5/drivers/i2c/algos/Makefile deleted file mode 100644 index d26856d2..00000000 --- a/ANDROID_3.4.5/drivers/i2c/algos/Makefile +++ /dev/null @@ -1,10 +0,0 @@ -# -# Makefile for the i2c algorithms -# - -obj-$(CONFIG_I2C_ALGOBIT) += i2c-algo-bit.o -obj-$(CONFIG_I2C_ALGOPCF) += i2c-algo-pcf.o -obj-$(CONFIG_I2C_ALGOPCA) += i2c-algo-pca.o - -ccflags-$(CONFIG_I2C_DEBUG_ALGO) := -DDEBUG -obj-$(CONFIG_I2C_WMT) += wmt-i2c-algo.o diff --git a/ANDROID_3.4.5/drivers/i2c/algos/i2c-algo-bit.c b/ANDROID_3.4.5/drivers/i2c/algos/i2c-algo-bit.c deleted file mode 100644 index 7f0b8321..00000000 --- a/ANDROID_3.4.5/drivers/i2c/algos/i2c-algo-bit.c +++ /dev/null @@ -1,671 +0,0 @@ -/* ------------------------------------------------------------------------- - * i2c-algo-bit.c i2c driver algorithms for bit-shift adapters - * ------------------------------------------------------------------------- - * Copyright (C) 1995-2000 Simon G. Vogl - - 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 Street, Fifth Floor, Boston, - MA 02110-1301 USA. - * ------------------------------------------------------------------------- */ - -/* With some changes from Frodo Looijaard <frodol@dds.nl>, Kyösti Mälkki - <kmalkki@cc.hut.fi> and Jean Delvare <khali@linux-fr.org> */ - -#include <linux/kernel.h> -#include <linux/module.h> -#include <linux/delay.h> -#include <linux/init.h> -#include <linux/errno.h> -#include <linux/sched.h> -#include <linux/i2c.h> -#include <linux/i2c-algo-bit.h> - - -/* ----- global defines ----------------------------------------------- */ - -#ifdef DEBUG -#define bit_dbg(level, dev, format, args...) \ - do { \ - if (i2c_debug >= level) \ - dev_dbg(dev, format, ##args); \ - } while (0) -#else -#define bit_dbg(level, dev, format, args...) \ - do {} while (0) -#endif /* DEBUG */ - -/* ----- global variables --------------------------------------------- */ - -static int bit_test; /* see if the line-setting functions work */ -module_param(bit_test, int, S_IRUGO); -MODULE_PARM_DESC(bit_test, "lines testing - 0 off; 1 report; 2 fail if stuck"); - -#ifdef DEBUG -static int i2c_debug = 1; -module_param(i2c_debug, int, S_IRUGO | S_IWUSR); -MODULE_PARM_DESC(i2c_debug, - "debug level - 0 off; 1 normal; 2 verbose; 3 very verbose"); -#endif - -/* --- setting states on the bus with the right timing: --------------- */ - -#define setsda(adap, val) adap->setsda(adap->data, val) -#define setscl(adap, val) adap->setscl(adap->data, val) -#define getsda(adap) adap->getsda(adap->data) -#define getscl(adap) adap->getscl(adap->data) - -static inline void sdalo(struct i2c_algo_bit_data *adap) -{ - setsda(adap, 0); - udelay((adap->udelay + 1) / 2); -} - -static inline void sdahi(struct i2c_algo_bit_data *adap) -{ - setsda(adap, 1); - udelay((adap->udelay + 1) / 2); -} - -static inline void scllo(struct i2c_algo_bit_data *adap) -{ - setscl(adap, 0); - udelay(adap->udelay / 2); -} - -/* - * Raise scl line, and do checking for delays. This is necessary for slower - * devices. - */ -static int sclhi(struct i2c_algo_bit_data *adap) -{ - unsigned long start; - - setscl(adap, 1); - - /* Not all adapters have scl sense line... */ - if (!adap->getscl) - goto done; - - start = jiffies; - while (!getscl(adap)) { - /* This hw knows how to read the clock line, so we wait - * until it actually gets high. This is safer as some - * chips may hold it low ("clock stretching") while they - * are processing data internally. - */ - if (time_after(jiffies, start + adap->timeout)) { - /* Test one last time, as we may have been preempted - * between last check and timeout test. - */ - if (getscl(adap)) - break; - return -ETIMEDOUT; - } - cpu_relax(); - } -#ifdef DEBUG - if (jiffies != start && i2c_debug >= 3) - pr_debug("i2c-algo-bit: needed %ld jiffies for SCL to go " - "high\n", jiffies - start); -#endif - -done: - udelay(adap->udelay); - return 0; -} - - -/* --- other auxiliary functions -------------------------------------- */ -static void i2c_start(struct i2c_algo_bit_data *adap) -{ - /* assert: scl, sda are high */ - setsda(adap, 0); - udelay(adap->udelay); - scllo(adap); -} - -static void i2c_repstart(struct i2c_algo_bit_data *adap) -{ - /* assert: scl is low */ - sdahi(adap); - sclhi(adap); - setsda(adap, 0); - udelay(adap->udelay); - scllo(adap); -} - - -static void i2c_stop(struct i2c_algo_bit_data *adap) -{ - /* assert: scl is low */ - sdalo(adap); - sclhi(adap); - setsda(adap, 1); - udelay(adap->udelay); -} - - - -/* send a byte without start cond., look for arbitration, - check ackn. from slave */ -/* returns: - * 1 if the device acknowledged - * 0 if the device did not ack - * -ETIMEDOUT if an error occurred (while raising the scl line) - */ -static int i2c_outb(struct i2c_adapter *i2c_adap, unsigned char c) -{ - int i; - int sb; - int ack; - struct i2c_algo_bit_data *adap = i2c_adap->algo_data; - - /* assert: scl is low */ - for (i = 7; i >= 0; i--) { - sb = (c >> i) & 1; - setsda(adap, sb); - udelay((adap->udelay + 1) / 2); - if (sclhi(adap) < 0) { /* timed out */ - bit_dbg(1, &i2c_adap->dev, "i2c_outb: 0x%02x, " - "timeout at bit #%d\n", (int)c, i); - return -ETIMEDOUT; - } - /* FIXME do arbitration here: - * if (sb && !getsda(adap)) -> ouch! Get out of here. - * - * Report a unique code, so higher level code can retry - * the whole (combined) message and *NOT* issue STOP. - */ - scllo(adap); - } - sdahi(adap); - if (sclhi(adap) < 0) { /* timeout */ - bit_dbg(1, &i2c_adap->dev, "i2c_outb: 0x%02x, " - "timeout at ack\n", (int)c); - return -ETIMEDOUT; - } - - /* read ack: SDA should be pulled down by slave, or it may - * NAK (usually to report problems with the data we wrote). - */ - ack = !getsda(adap); /* ack: sda is pulled low -> success */ - bit_dbg(2, &i2c_adap->dev, "i2c_outb: 0x%02x %s\n", (int)c, - ack ? "A" : "NA"); - - scllo(adap); - return ack; - /* assert: scl is low (sda undef) */ -} - - -static int i2c_inb(struct i2c_adapter *i2c_adap) -{ - /* read byte via i2c port, without start/stop sequence */ - /* acknowledge is sent in i2c_read. */ - int i; - unsigned char indata = 0; - struct i2c_algo_bit_data *adap = i2c_adap->algo_data; - - /* assert: scl is low */ - sdahi(adap); - for (i = 0; i < 8; i++) { - if (sclhi(adap) < 0) { /* timeout */ - bit_dbg(1, &i2c_adap->dev, "i2c_inb: timeout at bit " - "#%d\n", 7 - i); - return -ETIMEDOUT; - } - indata *= 2; - if (getsda(adap)) - indata |= 0x01; - setscl(adap, 0); - udelay(i == 7 ? adap->udelay / 2 : adap->udelay); - } - /* assert: scl is low */ - return indata; -} - -/* - * Sanity check for the adapter hardware - check the reaction of - * the bus lines only if it seems to be idle. - */ -static int test_bus(struct i2c_adapter *i2c_adap) -{ - struct i2c_algo_bit_data *adap = i2c_adap->algo_data; - const char *name = i2c_adap->name; - int scl, sda, ret; - - if (adap->pre_xfer) { - ret = adap->pre_xfer(i2c_adap); - if (ret < 0) - return -ENODEV; - } - - if (adap->getscl == NULL) - pr_info("%s: Testing SDA only, SCL is not readable\n", name); - - sda = getsda(adap); - scl = (adap->getscl == NULL) ? 1 : getscl(adap); - if (!scl || !sda) { - printk(KERN_WARNING - "%s: bus seems to be busy (scl=%d, sda=%d)\n", - name, scl, sda); - goto bailout; - } - - sdalo(adap); - sda = getsda(adap); - scl = (adap->getscl == NULL) ? 1 : getscl(adap); - if (sda) { - printk(KERN_WARNING "%s: SDA stuck high!\n", name); - goto bailout; - } - if (!scl) { - printk(KERN_WARNING "%s: SCL unexpected low " - "while pulling SDA low!\n", name); - goto bailout; - } - - sdahi(adap); - sda = getsda(adap); - scl = (adap->getscl == NULL) ? 1 : getscl(adap); - if (!sda) { - printk(KERN_WARNING "%s: SDA stuck low!\n", name); - goto bailout; - } - if (!scl) { - printk(KERN_WARNING "%s: SCL unexpected low " - "while pulling SDA high!\n", name); - goto bailout; - } - - scllo(adap); - sda = getsda(adap); - scl = (adap->getscl == NULL) ? 0 : getscl(adap); - if (scl) { - printk(KERN_WARNING "%s: SCL stuck high!\n", name); - goto bailout; - } - if (!sda) { - printk(KERN_WARNING "%s: SDA unexpected low " - "while pulling SCL low!\n", name); - goto bailout; - } - - sclhi(adap); - sda = getsda(adap); - scl = (adap->getscl == NULL) ? 1 : getscl(adap); - if (!scl) { - printk(KERN_WARNING "%s: SCL stuck low!\n", name); - goto bailout; - } - if (!sda) { - printk(KERN_WARNING "%s: SDA unexpected low " - "while pulling SCL high!\n", name); - goto bailout; - } - - if (adap->post_xfer) - adap->post_xfer(i2c_adap); - - pr_info("%s: Test OK\n", name); - return 0; -bailout: - sdahi(adap); - sclhi(adap); - - if (adap->post_xfer) - adap->post_xfer(i2c_adap); - - return -ENODEV; -} - -/* ----- Utility functions - */ - -/* try_address tries to contact a chip for a number of - * times before it gives up. - * return values: - * 1 chip answered - * 0 chip did not answer - * -x transmission error - */ -static int try_address(struct i2c_adapter *i2c_adap, - unsigned char addr, int retries) -{ - struct i2c_algo_bit_data *adap = i2c_adap->algo_data; - int i, ret = 0; - - for (i = 0; i <= retries; i++) { - ret = i2c_outb(i2c_adap, addr); - if (ret == 1 || i == retries) - break; - bit_dbg(3, &i2c_adap->dev, "emitting stop condition\n"); - i2c_stop(adap); - udelay(adap->udelay); - yield(); - bit_dbg(3, &i2c_adap->dev, "emitting start condition\n"); - i2c_start(adap); - } - if (i && ret) - bit_dbg(1, &i2c_adap->dev, "Used %d tries to %s client at " - "0x%02x: %s\n", i + 1, - addr & 1 ? "read from" : "write to", addr >> 1, - ret == 1 ? "success" : "failed, timeout?"); - return ret; -} - -static int sendbytes(struct i2c_adapter *i2c_adap, struct i2c_msg *msg) -{ - const unsigned char *temp = msg->buf; - int count = msg->len; - unsigned short nak_ok = msg->flags & I2C_M_IGNORE_NAK; - int retval; - int wrcount = 0; - - while (count > 0) { - retval = i2c_outb(i2c_adap, *temp); - - /* OK/ACK; or ignored NAK */ - if ((retval > 0) || (nak_ok && (retval == 0))) { - count--; - temp++; - wrcount++; - - /* A slave NAKing the master means the slave didn't like - * something about the data it saw. For example, maybe - * the SMBus PEC was wrong. - */ - } else if (retval == 0) { - dev_err(&i2c_adap->dev, "sendbytes: NAK bailout.\n"); - return -EIO; - - /* Timeout; or (someday) lost arbitration - * - * FIXME Lost ARB implies retrying the transaction from - * the first message, after the "winning" master issues - * its STOP. As a rule, upper layer code has no reason - * to know or care about this ... it is *NOT* an error. - */ - } else { - dev_err(&i2c_adap->dev, "sendbytes: error %d\n", - retval); - return retval; - } - } - return wrcount; -} - -static int acknak(struct i2c_adapter *i2c_adap, int is_ack) -{ - struct i2c_algo_bit_data *adap = i2c_adap->algo_data; - - /* assert: sda is high */ - if (is_ack) /* send ack */ - setsda(adap, 0); - udelay((adap->udelay + 1) / 2); - if (sclhi(adap) < 0) { /* timeout */ - dev_err(&i2c_adap->dev, "readbytes: ack/nak timeout\n"); - return -ETIMEDOUT; - } - scllo(adap); - return 0; -} - -static int readbytes(struct i2c_adapter *i2c_adap, struct i2c_msg *msg) -{ - int inval; - int rdcount = 0; /* counts bytes read */ - unsigned char *temp = msg->buf; - int count = msg->len; - const unsigned flags = msg->flags; - - while (count > 0) { - inval = i2c_inb(i2c_adap); - if (inval >= 0) { - *temp = inval; - rdcount++; - } else { /* read timed out */ - break; - } - - temp++; - count--; - - /* Some SMBus transactions require that we receive the - transaction length as the first read byte. */ - if (rdcount == 1 && (flags & I2C_M_RECV_LEN)) { - if (inval <= 0 || inval > I2C_SMBUS_BLOCK_MAX) { - if (!(flags & I2C_M_NO_RD_ACK)) - acknak(i2c_adap, 0); - dev_err(&i2c_adap->dev, "readbytes: invalid " - "block length (%d)\n", inval); - return -EPROTO; - } - /* The original count value accounts for the extra - bytes, that is, either 1 for a regular transaction, - or 2 for a PEC transaction. */ - count += inval; - msg->len += inval; - } - - bit_dbg(2, &i2c_adap->dev, "readbytes: 0x%02x %s\n", - inval, - (flags & I2C_M_NO_RD_ACK) - ? "(no ack/nak)" - : (count ? "A" : "NA")); - - if (!(flags & I2C_M_NO_RD_ACK)) { - inval = acknak(i2c_adap, count); - if (inval < 0) - return inval; - } - } - return rdcount; -} - -/* doAddress initiates the transfer by generating the start condition (in - * try_address) and transmits the address in the necessary format to handle - * reads, writes as well as 10bit-addresses. - * returns: - * 0 everything went okay, the chip ack'ed, or IGNORE_NAK flag was set - * -x an error occurred (like: -ENXIO if the device did not answer, or - * -ETIMEDOUT, for example if the lines are stuck...) - */ -static int bit_doAddress(struct i2c_adapter *i2c_adap, struct i2c_msg *msg) -{ - unsigned short flags = msg->flags; - unsigned short nak_ok = msg->flags & I2C_M_IGNORE_NAK; - struct i2c_algo_bit_data *adap = i2c_adap->algo_data; - - unsigned char addr; - int ret, retries; - - retries = nak_ok ? 0 : i2c_adap->retries; - - if (flags & I2C_M_TEN) { - /* a ten bit address */ - addr = 0xf0 | ((msg->addr >> 7) & 0x06); - bit_dbg(2, &i2c_adap->dev, "addr0: %d\n", addr); - /* try extended address code...*/ - ret = try_address(i2c_adap, addr, retries); - if ((ret != 1) && !nak_ok) { - dev_err(&i2c_adap->dev, - "died at extended address code\n"); - return -ENXIO; - } - /* the remaining 8 bit address */ - ret = i2c_outb(i2c_adap, msg->addr & 0xff); - if ((ret != 1) && !nak_ok) { - /* the chip did not ack / xmission error occurred */ - dev_err(&i2c_adap->dev, "died at 2nd address code\n"); - return -ENXIO; - } - if (flags & I2C_M_RD) { - bit_dbg(3, &i2c_adap->dev, "emitting repeated " - "start condition\n"); - i2c_repstart(adap); - /* okay, now switch into reading mode */ - addr |= 0x01; - ret = try_address(i2c_adap, addr, retries); - if ((ret != 1) && !nak_ok) { - dev_err(&i2c_adap->dev, - "died at repeated address code\n"); - return -EIO; - } - } - } else { /* normal 7bit address */ - addr = msg->addr << 1; - if (flags & I2C_M_RD) - addr |= 1; - if (flags & I2C_M_REV_DIR_ADDR) - addr ^= 1; - ret = try_address(i2c_adap, addr, retries); - if ((ret != 1) && !nak_ok) - return -ENXIO; - } - - return 0; -} - -static int bit_xfer(struct i2c_adapter *i2c_adap, - struct i2c_msg msgs[], int num) -{ - struct i2c_msg *pmsg; - struct i2c_algo_bit_data *adap = i2c_adap->algo_data; - int i, ret; - unsigned short nak_ok; - - if (adap->pre_xfer) { - ret = adap->pre_xfer(i2c_adap); - if (ret < 0) - return ret; - } - - bit_dbg(3, &i2c_adap->dev, "emitting start condition\n"); - i2c_start(adap); - for (i = 0; i < num; i++) { - pmsg = &msgs[i]; - nak_ok = pmsg->flags & I2C_M_IGNORE_NAK; - if (!(pmsg->flags & I2C_M_NOSTART)) { - if (i) { - bit_dbg(3, &i2c_adap->dev, "emitting " - "repeated start condition\n"); - i2c_repstart(adap); - } - ret = bit_doAddress(i2c_adap, pmsg); - if ((ret != 0) && !nak_ok) { - bit_dbg(1, &i2c_adap->dev, "NAK from " - "device addr 0x%02x msg #%d\n", - msgs[i].addr, i); - goto bailout; - } - } - if (pmsg->flags & I2C_M_RD) { - /* read bytes into buffer*/ - ret = readbytes(i2c_adap, pmsg); - if (ret >= 1) - bit_dbg(2, &i2c_adap->dev, "read %d byte%s\n", - ret, ret == 1 ? "" : "s"); - if (ret < pmsg->len) { - if (ret >= 0) - ret = -EIO; - goto bailout; - } - } else { - /* write bytes from buffer */ - ret = sendbytes(i2c_adap, pmsg); - if (ret >= 1) - bit_dbg(2, &i2c_adap->dev, "wrote %d byte%s\n", - ret, ret == 1 ? "" : "s"); - if (ret < pmsg->len) { - if (ret >= 0) - ret = -EIO; - goto bailout; - } - } - } - ret = i; - -bailout: - bit_dbg(3, &i2c_adap->dev, "emitting stop condition\n"); - i2c_stop(adap); - - if (adap->post_xfer) - adap->post_xfer(i2c_adap); - return ret; -} - -static u32 bit_func(struct i2c_adapter *adap) -{ - return I2C_FUNC_I2C | I2C_FUNC_SMBUS_EMUL | - I2C_FUNC_SMBUS_READ_BLOCK_DATA | - I2C_FUNC_SMBUS_BLOCK_PROC_CALL | - I2C_FUNC_10BIT_ADDR | I2C_FUNC_PROTOCOL_MANGLING; -} - - -/* -----exported algorithm data: ------------------------------------- */ - -const struct i2c_algorithm i2c_bit_algo = { - .master_xfer = bit_xfer, - .functionality = bit_func, -}; -EXPORT_SYMBOL(i2c_bit_algo); - -/* - * registering functions to load algorithms at runtime - */ -static int __i2c_bit_add_bus(struct i2c_adapter *adap, - int (*add_adapter)(struct i2c_adapter *)) -{ - struct i2c_algo_bit_data *bit_adap = adap->algo_data; - int ret; - - if (bit_test) { - ret = test_bus(adap); - if (bit_test >= 2 && ret < 0) - return -ENODEV; - } - - /* register new adapter to i2c module... */ - adap->algo = &i2c_bit_algo; - adap->retries = 3; - - ret = add_adapter(adap); - if (ret < 0) - return ret; - - /* Complain if SCL can't be read */ - if (bit_adap->getscl == NULL) { - dev_warn(&adap->dev, "Not I2C compliant: can't read SCL\n"); - dev_warn(&adap->dev, "Bus may be unreliable\n"); - } - return 0; -} - -int i2c_bit_add_bus(struct i2c_adapter *adap) -{ - return __i2c_bit_add_bus(adap, i2c_add_adapter); -} -EXPORT_SYMBOL(i2c_bit_add_bus); - -int i2c_bit_add_numbered_bus(struct i2c_adapter *adap) -{ - return __i2c_bit_add_bus(adap, i2c_add_numbered_adapter); -} -EXPORT_SYMBOL(i2c_bit_add_numbered_bus); - -MODULE_AUTHOR("Simon G. Vogl <simon@tk.uni-linz.ac.at>"); -MODULE_DESCRIPTION("I2C-Bus bit-banging algorithm"); -MODULE_LICENSE("GPL"); diff --git a/ANDROID_3.4.5/drivers/i2c/algos/i2c-algo-pca.c b/ANDROID_3.4.5/drivers/i2c/algos/i2c-algo-pca.c deleted file mode 100644 index 73133b10..00000000 --- a/ANDROID_3.4.5/drivers/i2c/algos/i2c-algo-pca.c +++ /dev/null @@ -1,566 +0,0 @@ -/* - * i2c-algo-pca.c i2c driver algorithms for PCA9564 adapters - * Copyright (C) 2004 Arcom Control Systems - * Copyright (C) 2008 Pengutronix - * - * 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 Street, Fifth Floor, Boston, - * MA 02110-1301 USA. - */ - -#include <linux/kernel.h> -#include <linux/module.h> -#include <linux/moduleparam.h> -#include <linux/delay.h> -#include <linux/jiffies.h> -#include <linux/init.h> -#include <linux/errno.h> -#include <linux/i2c.h> -#include <linux/i2c-algo-pca.h> - -#define DEB1(fmt, args...) do { if (i2c_debug >= 1) \ - printk(KERN_DEBUG fmt, ## args); } while (0) -#define DEB2(fmt, args...) do { if (i2c_debug >= 2) \ - printk(KERN_DEBUG fmt, ## args); } while (0) -#define DEB3(fmt, args...) do { if (i2c_debug >= 3) \ - printk(KERN_DEBUG fmt, ## args); } while (0) - -static int i2c_debug; - -#define pca_outw(adap, reg, val) adap->write_byte(adap->data, reg, val) -#define pca_inw(adap, reg) adap->read_byte(adap->data, reg) - -#define pca_status(adap) pca_inw(adap, I2C_PCA_STA) -#define pca_clock(adap) adap->i2c_clock -#define pca_set_con(adap, val) pca_outw(adap, I2C_PCA_CON, val) -#define pca_get_con(adap) pca_inw(adap, I2C_PCA_CON) -#define pca_wait(adap) adap->wait_for_completion(adap->data) -#define pca_reset(adap) adap->reset_chip(adap->data) - -static void pca9665_reset(void *pd) -{ - struct i2c_algo_pca_data *adap = pd; - pca_outw(adap, I2C_PCA_INDPTR, I2C_PCA_IPRESET); - pca_outw(adap, I2C_PCA_IND, 0xA5); - pca_outw(adap, I2C_PCA_IND, 0x5A); -} - -/* - * Generate a start condition on the i2c bus. - * - * returns after the start condition has occurred - */ -static int pca_start(struct i2c_algo_pca_data *adap) -{ - int sta = pca_get_con(adap); - DEB2("=== START\n"); - sta |= I2C_PCA_CON_STA; - sta &= ~(I2C_PCA_CON_STO|I2C_PCA_CON_SI); - pca_set_con(adap, sta); - return pca_wait(adap); -} - -/* - * Generate a repeated start condition on the i2c bus - * - * return after the repeated start condition has occurred - */ -static int pca_repeated_start(struct i2c_algo_pca_data *adap) -{ - int sta = pca_get_con(adap); - DEB2("=== REPEATED START\n"); - sta |= I2C_PCA_CON_STA; - sta &= ~(I2C_PCA_CON_STO|I2C_PCA_CON_SI); - pca_set_con(adap, sta); - return pca_wait(adap); -} - -/* - * Generate a stop condition on the i2c bus - * - * returns after the stop condition has been generated - * - * STOPs do not generate an interrupt or set the SI flag, since the - * part returns the idle state (0xf8). Hence we don't need to - * pca_wait here. - */ -static void pca_stop(struct i2c_algo_pca_data *adap) -{ - int sta = pca_get_con(adap); - DEB2("=== STOP\n"); - sta |= I2C_PCA_CON_STO; - sta &= ~(I2C_PCA_CON_STA|I2C_PCA_CON_SI); - pca_set_con(adap, sta); -} - -/* - * Send the slave address and R/W bit - * - * returns after the address has been sent - */ -static int pca_address(struct i2c_algo_pca_data *adap, - struct i2c_msg *msg) -{ - int sta = pca_get_con(adap); - int addr; - - addr = ((0x7f & msg->addr) << 1); - if (msg->flags & I2C_M_RD) - addr |= 1; - DEB2("=== SLAVE ADDRESS %#04x+%c=%#04x\n", - msg->addr, msg->flags & I2C_M_RD ? 'R' : 'W', addr); - - pca_outw(adap, I2C_PCA_DAT, addr); - - sta &= ~(I2C_PCA_CON_STO|I2C_PCA_CON_STA|I2C_PCA_CON_SI); - pca_set_con(adap, sta); - - return pca_wait(adap); -} - -/* - * Transmit a byte. - * - * Returns after the byte has been transmitted - */ -static int pca_tx_byte(struct i2c_algo_pca_data *adap, - __u8 b) -{ - int sta = pca_get_con(adap); - DEB2("=== WRITE %#04x\n", b); - pca_outw(adap, I2C_PCA_DAT, b); - - sta &= ~(I2C_PCA_CON_STO|I2C_PCA_CON_STA|I2C_PCA_CON_SI); - pca_set_con(adap, sta); - - return pca_wait(adap); -} - -/* - * Receive a byte - * - * returns immediately. - */ -static void pca_rx_byte(struct i2c_algo_pca_data *adap, - __u8 *b, int ack) -{ - *b = pca_inw(adap, I2C_PCA_DAT); - DEB2("=== READ %#04x %s\n", *b, ack ? "ACK" : "NACK"); -} - -/* - * Setup ACK or NACK for next received byte and wait for it to arrive. - * - * Returns after next byte has arrived. - */ -static int pca_rx_ack(struct i2c_algo_pca_data *adap, - int ack) -{ - int sta = pca_get_con(adap); - - sta &= ~(I2C_PCA_CON_STO|I2C_PCA_CON_STA|I2C_PCA_CON_SI|I2C_PCA_CON_AA); - - if (ack) - sta |= I2C_PCA_CON_AA; - - pca_set_con(adap, sta); - return pca_wait(adap); -} - -static int pca_xfer(struct i2c_adapter *i2c_adap, - struct i2c_msg *msgs, - int num) -{ - struct i2c_algo_pca_data *adap = i2c_adap->algo_data; - struct i2c_msg *msg = NULL; - int curmsg; - int numbytes = 0; - int state; - int ret; - int completed = 1; - unsigned long timeout = jiffies + i2c_adap->timeout; - - while ((state = pca_status(adap)) != 0xf8) { - if (time_before(jiffies, timeout)) { - msleep(10); - } else { - dev_dbg(&i2c_adap->dev, "bus is not idle. status is " - "%#04x\n", state); - return -EBUSY; - } - } - - DEB1("{{{ XFER %d messages\n", num); - - if (i2c_debug >= 2) { - for (curmsg = 0; curmsg < num; curmsg++) { - int addr, i; - msg = &msgs[curmsg]; - - addr = (0x7f & msg->addr) ; - - if (msg->flags & I2C_M_RD) - printk(KERN_INFO " [%02d] RD %d bytes from %#02x [%#02x, ...]\n", - curmsg, msg->len, addr, (addr << 1) | 1); - else { - printk(KERN_INFO " [%02d] WR %d bytes to %#02x [%#02x%s", - curmsg, msg->len, addr, addr << 1, - msg->len == 0 ? "" : ", "); - for (i = 0; i < msg->len; i++) - printk("%#04x%s", msg->buf[i], i == msg->len - 1 ? "" : ", "); - printk("]\n"); - } - } - } - - curmsg = 0; - ret = -EIO; - while (curmsg < num) { - state = pca_status(adap); - - DEB3("STATE is 0x%02x\n", state); - msg = &msgs[curmsg]; - - switch (state) { - case 0xf8: /* On reset or stop the bus is idle */ - completed = pca_start(adap); - break; - - case 0x08: /* A START condition has been transmitted */ - case 0x10: /* A repeated start condition has been transmitted */ - completed = pca_address(adap, msg); - break; - - case 0x18: /* SLA+W has been transmitted; ACK has been received */ - case 0x28: /* Data byte in I2CDAT has been transmitted; ACK has been received */ - if (numbytes < msg->len) { - completed = pca_tx_byte(adap, - msg->buf[numbytes]); - numbytes++; - break; - } - curmsg++; numbytes = 0; - if (curmsg == num) - pca_stop(adap); - else - completed = pca_repeated_start(adap); - break; - - case 0x20: /* SLA+W has been transmitted; NOT ACK has been received */ - DEB2("NOT ACK received after SLA+W\n"); - pca_stop(adap); - ret = -ENXIO; - goto out; - - case 0x40: /* SLA+R has been transmitted; ACK has been received */ - completed = pca_rx_ack(adap, msg->len > 1); - break; - - case 0x50: /* Data bytes has been received; ACK has been returned */ - if (numbytes < msg->len) { - pca_rx_byte(adap, &msg->buf[numbytes], 1); - numbytes++; - completed = pca_rx_ack(adap, - numbytes < msg->len - 1); - break; - } - curmsg++; numbytes = 0; - if (curmsg == num) - pca_stop(adap); - else - completed = pca_repeated_start(adap); - break; - - case 0x48: /* SLA+R has been transmitted; NOT ACK has been received */ - DEB2("NOT ACK received after SLA+R\n"); - pca_stop(adap); - ret = -ENXIO; - goto out; - - case 0x30: /* Data byte in I2CDAT has been transmitted; NOT ACK has been received */ - DEB2("NOT ACK received after data byte\n"); - pca_stop(adap); - goto out; - - case 0x38: /* Arbitration lost during SLA+W, SLA+R or data bytes */ - DEB2("Arbitration lost\n"); - /* - * The PCA9564 data sheet (2006-09-01) says "A - * START condition will be transmitted when the - * bus becomes free (STOP or SCL and SDA high)" - * when the STA bit is set (p. 11). - * - * In case this won't work, try pca_reset() - * instead. - */ - pca_start(adap); - goto out; - - case 0x58: /* Data byte has been received; NOT ACK has been returned */ - if (numbytes == msg->len - 1) { - pca_rx_byte(adap, &msg->buf[numbytes], 0); - curmsg++; numbytes = 0; - if (curmsg == num) - pca_stop(adap); - else - completed = pca_repeated_start(adap); - } else { - DEB2("NOT ACK sent after data byte received. " - "Not final byte. numbytes %d. len %d\n", - numbytes, msg->len); - pca_stop(adap); - goto out; - } - break; - case 0x70: /* Bus error - SDA stuck low */ - DEB2("BUS ERROR - SDA Stuck low\n"); - pca_reset(adap); - goto out; - case 0x90: /* Bus error - SCL stuck low */ - DEB2("BUS ERROR - SCL Stuck low\n"); - pca_reset(adap); - goto out; - case 0x00: /* Bus error during master or slave mode due to illegal START or STOP condition */ - DEB2("BUS ERROR - Illegal START or STOP\n"); - pca_reset(adap); - goto out; - default: - dev_err(&i2c_adap->dev, "unhandled SIO state 0x%02x\n", state); - break; - } - - if (!completed) - goto out; - } - - ret = curmsg; - out: - DEB1("}}} transferred %d/%d messages. " - "status is %#04x. control is %#04x\n", - curmsg, num, pca_status(adap), - pca_get_con(adap)); - return ret; -} - -static u32 pca_func(struct i2c_adapter *adap) -{ - return I2C_FUNC_I2C | I2C_FUNC_SMBUS_EMUL; -} - -static const struct i2c_algorithm pca_algo = { - .master_xfer = pca_xfer, - .functionality = pca_func, -}; - -static unsigned int pca_probe_chip(struct i2c_adapter *adap) -{ - struct i2c_algo_pca_data *pca_data = adap->algo_data; - /* The trick here is to check if there is an indirect register - * available. If there is one, we will read the value we first - * wrote on I2C_PCA_IADR. Otherwise, we will read the last value - * we wrote on I2C_PCA_ADR - */ - pca_outw(pca_data, I2C_PCA_INDPTR, I2C_PCA_IADR); - pca_outw(pca_data, I2C_PCA_IND, 0xAA); - pca_outw(pca_data, I2C_PCA_INDPTR, I2C_PCA_ITO); - pca_outw(pca_data, I2C_PCA_IND, 0x00); - pca_outw(pca_data, I2C_PCA_INDPTR, I2C_PCA_IADR); - if (pca_inw(pca_data, I2C_PCA_IND) == 0xAA) { - printk(KERN_INFO "%s: PCA9665 detected.\n", adap->name); - return I2C_PCA_CHIP_9665; - } else { - printk(KERN_INFO "%s: PCA9564 detected.\n", adap->name); - return I2C_PCA_CHIP_9564; - } -} - -static int pca_init(struct i2c_adapter *adap) -{ - struct i2c_algo_pca_data *pca_data = adap->algo_data; - - adap->algo = &pca_algo; - - if (pca_probe_chip(adap) == I2C_PCA_CHIP_9564) { - static int freqs[] = {330, 288, 217, 146, 88, 59, 44, 36}; - int clock; - - if (pca_data->i2c_clock > 7) { - switch (pca_data->i2c_clock) { - case 330000: - pca_data->i2c_clock = I2C_PCA_CON_330kHz; - break; - case 288000: - pca_data->i2c_clock = I2C_PCA_CON_288kHz; - break; - case 217000: - pca_data->i2c_clock = I2C_PCA_CON_217kHz; - break; - case 146000: - pca_data->i2c_clock = I2C_PCA_CON_146kHz; - break; - case 88000: - pca_data->i2c_clock = I2C_PCA_CON_88kHz; - break; - case 59000: - pca_data->i2c_clock = I2C_PCA_CON_59kHz; - break; - case 44000: - pca_data->i2c_clock = I2C_PCA_CON_44kHz; - break; - case 36000: - pca_data->i2c_clock = I2C_PCA_CON_36kHz; - break; - default: - printk(KERN_WARNING - "%s: Invalid I2C clock speed selected." - " Using default 59kHz.\n", adap->name); - pca_data->i2c_clock = I2C_PCA_CON_59kHz; - } - } else { - printk(KERN_WARNING "%s: " - "Choosing the clock frequency based on " - "index is deprecated." - " Use the nominal frequency.\n", adap->name); - } - - pca_reset(pca_data); - - clock = pca_clock(pca_data); - printk(KERN_INFO "%s: Clock frequency is %dkHz\n", - adap->name, freqs[clock]); - - pca_set_con(pca_data, I2C_PCA_CON_ENSIO | clock); - } else { - int clock; - int mode; - int tlow, thi; - /* Values can be found on PCA9665 datasheet section 7.3.2.6 */ - int min_tlow, min_thi; - /* These values are the maximum raise and fall values allowed - * by the I2C operation mode (Standard, Fast or Fast+) - * They are used (added) below to calculate the clock dividers - * of PCA9665. Note that they are slightly different of the - * real maximum, to allow the change on mode exactly on the - * maximum clock rate for each mode - */ - int raise_fall_time; - - /* Ignore the reset function from the module, - * we can use the parallel bus reset - */ - pca_data->reset_chip = pca9665_reset; - - if (pca_data->i2c_clock > 1265800) { - printk(KERN_WARNING "%s: I2C clock speed too high." - " Using 1265.8kHz.\n", adap->name); - pca_data->i2c_clock = 1265800; - } - - if (pca_data->i2c_clock < 60300) { - printk(KERN_WARNING "%s: I2C clock speed too low." - " Using 60.3kHz.\n", adap->name); - pca_data->i2c_clock = 60300; - } - - /* To avoid integer overflow, use clock/100 for calculations */ - clock = pca_clock(pca_data) / 100; - - if (pca_data->i2c_clock > 10000) { - mode = I2C_PCA_MODE_TURBO; - min_tlow = 14; - min_thi = 5; - raise_fall_time = 22; /* Raise 11e-8s, Fall 11e-8s */ - } else if (pca_data->i2c_clock > 4000) { - mode = I2C_PCA_MODE_FASTP; - min_tlow = 17; - min_thi = 9; - raise_fall_time = 22; /* Raise 11e-8s, Fall 11e-8s */ - } else if (pca_data->i2c_clock > 1000) { - mode = I2C_PCA_MODE_FAST; - min_tlow = 44; - min_thi = 20; - raise_fall_time = 58; /* Raise 29e-8s, Fall 29e-8s */ - } else { - mode = I2C_PCA_MODE_STD; - min_tlow = 157; - min_thi = 134; - raise_fall_time = 127; /* Raise 29e-8s, Fall 98e-8s */ - } - - /* The minimum clock that respects the thi/tlow = 134/157 is - * 64800 Hz. Below that, we have to fix the tlow to 255 and - * calculate the thi factor. - */ - if (clock < 648) { - tlow = 255; - thi = 1000000 - clock * raise_fall_time; - thi /= (I2C_PCA_OSC_PER * clock) - tlow; - } else { - tlow = (1000000 - clock * raise_fall_time) * min_tlow; - tlow /= I2C_PCA_OSC_PER * clock * (min_thi + min_tlow); - thi = tlow * min_thi / min_tlow; - } - - pca_reset(pca_data); - - printk(KERN_INFO - "%s: Clock frequency is %dHz\n", adap->name, clock * 100); - - pca_outw(pca_data, I2C_PCA_INDPTR, I2C_PCA_IMODE); - pca_outw(pca_data, I2C_PCA_IND, mode); - pca_outw(pca_data, I2C_PCA_INDPTR, I2C_PCA_ISCLL); - pca_outw(pca_data, I2C_PCA_IND, tlow); - pca_outw(pca_data, I2C_PCA_INDPTR, I2C_PCA_ISCLH); - pca_outw(pca_data, I2C_PCA_IND, thi); - - pca_set_con(pca_data, I2C_PCA_CON_ENSIO); - } - udelay(500); /* 500 us for oscilator to stabilise */ - - return 0; -} - -/* - * registering functions to load algorithms at runtime - */ -int i2c_pca_add_bus(struct i2c_adapter *adap) -{ - int rval; - - rval = pca_init(adap); - if (rval) - return rval; - - return i2c_add_adapter(adap); -} -EXPORT_SYMBOL(i2c_pca_add_bus); - -int i2c_pca_add_numbered_bus(struct i2c_adapter *adap) -{ - int rval; - - rval = pca_init(adap); - if (rval) - return rval; - - return i2c_add_numbered_adapter(adap); -} -EXPORT_SYMBOL(i2c_pca_add_numbered_bus); - -MODULE_AUTHOR("Ian Campbell <icampbell@arcom.com>, " - "Wolfram Sang <w.sang@pengutronix.de>"); -MODULE_DESCRIPTION("I2C-Bus PCA9564/PCA9665 algorithm"); -MODULE_LICENSE("GPL"); - -module_param(i2c_debug, int, 0); diff --git a/ANDROID_3.4.5/drivers/i2c/algos/i2c-algo-pcf.c b/ANDROID_3.4.5/drivers/i2c/algos/i2c-algo-pcf.c deleted file mode 100644 index 5c237952..00000000 --- a/ANDROID_3.4.5/drivers/i2c/algos/i2c-algo-pcf.c +++ /dev/null @@ -1,442 +0,0 @@ -/* - * i2c-algo-pcf.c i2c driver algorithms for PCF8584 adapters - * - * Copyright (C) 1995-1997 Simon G. Vogl - * 1998-2000 Hans Berglund - * - * 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 Street, Fifth Floor, Boston, - * MA 02110-1301 USA. - * - * With some changes from Kyösti Mälkki <kmalkki@cc.hut.fi> and - * Frodo Looijaard <frodol@dds.nl>, and also from Martin Bailey - * <mbailey@littlefeet-inc.com> - * - * Partially rewriten by Oleg I. Vdovikin <vdovikin@jscc.ru> to handle multiple - * messages, proper stop/repstart signaling during receive, added detect code - */ - -#include <linux/kernel.h> -#include <linux/module.h> -#include <linux/delay.h> -#include <linux/init.h> -#include <linux/errno.h> -#include <linux/i2c.h> -#include <linux/i2c-algo-pcf.h> -#include "i2c-algo-pcf.h" - - -#define DEB2(x) if (i2c_debug >= 2) x -#define DEB3(x) if (i2c_debug >= 3) x /* print several statistical values */ -#define DEBPROTO(x) if (i2c_debug >= 9) x; - /* debug the protocol by showing transferred bits */ -#define DEF_TIMEOUT 16 - -/* - * module parameters: - */ -static int i2c_debug; - -/* setting states on the bus with the right timing: */ - -#define set_pcf(adap, ctl, val) adap->setpcf(adap->data, ctl, val) -#define get_pcf(adap, ctl) adap->getpcf(adap->data, ctl) -#define get_own(adap) adap->getown(adap->data) -#define get_clock(adap) adap->getclock(adap->data) -#define i2c_outb(adap, val) adap->setpcf(adap->data, 0, val) -#define i2c_inb(adap) adap->getpcf(adap->data, 0) - -/* other auxiliary functions */ - -static void i2c_start(struct i2c_algo_pcf_data *adap) -{ - DEBPROTO(printk(KERN_DEBUG "S ")); - set_pcf(adap, 1, I2C_PCF_START); -} - -static void i2c_repstart(struct i2c_algo_pcf_data *adap) -{ - DEBPROTO(printk(" Sr ")); - set_pcf(adap, 1, I2C_PCF_REPSTART); -} - -static void i2c_stop(struct i2c_algo_pcf_data *adap) -{ - DEBPROTO(printk("P\n")); - set_pcf(adap, 1, I2C_PCF_STOP); -} - -static void handle_lab(struct i2c_algo_pcf_data *adap, const int *status) -{ - DEB2(printk(KERN_INFO - "i2c-algo-pcf.o: lost arbitration (CSR 0x%02x)\n", - *status)); - /* - * Cleanup from LAB -- reset and enable ESO. - * This resets the PCF8584; since we've lost the bus, no - * further attempts should be made by callers to clean up - * (no i2c_stop() etc.) - */ - set_pcf(adap, 1, I2C_PCF_PIN); - set_pcf(adap, 1, I2C_PCF_ESO); - /* - * We pause for a time period sufficient for any running - * I2C transaction to complete -- the arbitration logic won't - * work properly until the next START is seen. - * It is assumed the bus driver or client has set a proper value. - * - * REVISIT: should probably use msleep instead of mdelay if we - * know we can sleep. - */ - if (adap->lab_mdelay) - mdelay(adap->lab_mdelay); - - DEB2(printk(KERN_INFO - "i2c-algo-pcf.o: reset LAB condition (CSR 0x%02x)\n", - get_pcf(adap, 1))); -} - -static int wait_for_bb(struct i2c_algo_pcf_data *adap) -{ - - int timeout = DEF_TIMEOUT; - int status; - - status = get_pcf(adap, 1); - - while (!(status & I2C_PCF_BB) && --timeout) { - udelay(100); /* wait for 100 us */ - status = get_pcf(adap, 1); - } - - if (timeout == 0) { - printk(KERN_ERR "Timeout waiting for Bus Busy\n"); - return -ETIMEDOUT; - } - - return 0; -} - -static int wait_for_pin(struct i2c_algo_pcf_data *adap, int *status) -{ - - int timeout = DEF_TIMEOUT; - - *status = get_pcf(adap, 1); - - while ((*status & I2C_PCF_PIN) && --timeout) { - adap->waitforpin(adap->data); - *status = get_pcf(adap, 1); - } - if (*status & I2C_PCF_LAB) { - handle_lab(adap, status); - return -EINTR; - } - - if (timeout == 0) - return -ETIMEDOUT; - - return 0; -} - -/* - * This should perform the 'PCF8584 initialization sequence' as described - * in the Philips IC12 data book (1995, Aug 29). - * There should be a 30 clock cycle wait after reset, I assume this - * has been fulfilled. - * There should be a delay at the end equal to the longest I2C message - * to synchronize the BB-bit (in multimaster systems). How long is - * this? I assume 1 second is always long enough. - * - * vdovikin: added detect code for PCF8584 - */ -static int pcf_init_8584 (struct i2c_algo_pcf_data *adap) -{ - unsigned char temp; - - DEB3(printk(KERN_DEBUG "i2c-algo-pcf.o: PCF state 0x%02x\n", - get_pcf(adap, 1))); - - /* S1=0x80: S0 selected, serial interface off */ - set_pcf(adap, 1, I2C_PCF_PIN); - /* - * check to see S1 now used as R/W ctrl - - * PCF8584 does that when ESO is zero - */ - if (((temp = get_pcf(adap, 1)) & 0x7f) != (0)) { - DEB2(printk(KERN_ERR "i2c-algo-pcf.o: PCF detection failed -- can't select S0 (0x%02x).\n", temp)); - return -ENXIO; /* definitely not PCF8584 */ - } - - /* load own address in S0, effective address is (own << 1) */ - i2c_outb(adap, get_own(adap)); - /* check it's really written */ - if ((temp = i2c_inb(adap)) != get_own(adap)) { - DEB2(printk(KERN_ERR "i2c-algo-pcf.o: PCF detection failed -- can't set S0 (0x%02x).\n", temp)); - return -ENXIO; - } - - /* S1=0xA0, next byte in S2 */ - set_pcf(adap, 1, I2C_PCF_PIN | I2C_PCF_ES1); - /* check to see S2 now selected */ - if (((temp = get_pcf(adap, 1)) & 0x7f) != I2C_PCF_ES1) { - DEB2(printk(KERN_ERR "i2c-algo-pcf.o: PCF detection failed -- can't select S2 (0x%02x).\n", temp)); - return -ENXIO; - } - - /* load clock register S2 */ - i2c_outb(adap, get_clock(adap)); - /* check it's really written, the only 5 lowest bits does matter */ - if (((temp = i2c_inb(adap)) & 0x1f) != get_clock(adap)) { - DEB2(printk(KERN_ERR "i2c-algo-pcf.o: PCF detection failed -- can't set S2 (0x%02x).\n", temp)); - return -ENXIO; - } - - /* Enable serial interface, idle, S0 selected */ - set_pcf(adap, 1, I2C_PCF_IDLE); - - /* check to see PCF is really idled and we can access status register */ - if ((temp = get_pcf(adap, 1)) != (I2C_PCF_PIN | I2C_PCF_BB)) { - DEB2(printk(KERN_ERR "i2c-algo-pcf.o: PCF detection failed -- can't select S1` (0x%02x).\n", temp)); - return -ENXIO; - } - - printk(KERN_DEBUG "i2c-algo-pcf.o: detected and initialized PCF8584.\n"); - - return 0; -} - -static int pcf_sendbytes(struct i2c_adapter *i2c_adap, const char *buf, - int count, int last) -{ - struct i2c_algo_pcf_data *adap = i2c_adap->algo_data; - int wrcount, status, timeout; - - for (wrcount=0; wrcount<count; ++wrcount) { - DEB2(dev_dbg(&i2c_adap->dev, "i2c_write: writing %2.2X\n", - buf[wrcount] & 0xff)); - i2c_outb(adap, buf[wrcount]); - timeout = wait_for_pin(adap, &status); - if (timeout) { - if (timeout == -EINTR) - return -EINTR; /* arbitration lost */ - - i2c_stop(adap); - dev_err(&i2c_adap->dev, "i2c_write: error - timeout.\n"); - return -EREMOTEIO; /* got a better one ?? */ - } - if (status & I2C_PCF_LRB) { - i2c_stop(adap); - dev_err(&i2c_adap->dev, "i2c_write: error - no ack.\n"); - return -EREMOTEIO; /* got a better one ?? */ - } - } - if (last) - i2c_stop(adap); - else - i2c_repstart(adap); - - return wrcount; -} - -static int pcf_readbytes(struct i2c_adapter *i2c_adap, char *buf, - int count, int last) -{ - int i, status; - struct i2c_algo_pcf_data *adap = i2c_adap->algo_data; - int wfp; - - /* increment number of bytes to read by one -- read dummy byte */ - for (i = 0; i <= count; i++) { - - if ((wfp = wait_for_pin(adap, &status))) { - if (wfp == -EINTR) - return -EINTR; /* arbitration lost */ - - i2c_stop(adap); - dev_err(&i2c_adap->dev, "pcf_readbytes timed out.\n"); - return -1; - } - - if ((status & I2C_PCF_LRB) && (i != count)) { - i2c_stop(adap); - dev_err(&i2c_adap->dev, "i2c_read: i2c_inb, No ack.\n"); - return -1; - } - - if (i == count - 1) { - set_pcf(adap, 1, I2C_PCF_ESO); - } else if (i == count) { - if (last) - i2c_stop(adap); - else - i2c_repstart(adap); - } - - if (i) - buf[i - 1] = i2c_inb(adap); - else - i2c_inb(adap); /* dummy read */ - } - - return i - 1; -} - - -static int pcf_doAddress(struct i2c_algo_pcf_data *adap, - struct i2c_msg *msg) -{ - unsigned short flags = msg->flags; - unsigned char addr; - - addr = msg->addr << 1; - if (flags & I2C_M_RD) - addr |= 1; - if (flags & I2C_M_REV_DIR_ADDR) - addr ^= 1; - i2c_outb(adap, addr); - - return 0; -} - -static int pcf_xfer(struct i2c_adapter *i2c_adap, - struct i2c_msg *msgs, - int num) -{ - struct i2c_algo_pcf_data *adap = i2c_adap->algo_data; - struct i2c_msg *pmsg; - int i; - int ret=0, timeout, status; - - if (adap->xfer_begin) - adap->xfer_begin(adap->data); - - /* Check for bus busy */ - timeout = wait_for_bb(adap); - if (timeout) { - DEB2(printk(KERN_ERR "i2c-algo-pcf.o: " - "Timeout waiting for BB in pcf_xfer\n");) - i = -EIO; - goto out; - } - - for (i = 0;ret >= 0 && i < num; i++) { - pmsg = &msgs[i]; - - DEB2(printk(KERN_DEBUG "i2c-algo-pcf.o: Doing %s %d bytes to 0x%02x - %d of %d messages\n", - pmsg->flags & I2C_M_RD ? "read" : "write", - pmsg->len, pmsg->addr, i + 1, num);) - - ret = pcf_doAddress(adap, pmsg); - - /* Send START */ - if (i == 0) - i2c_start(adap); - - /* Wait for PIN (pending interrupt NOT) */ - timeout = wait_for_pin(adap, &status); - if (timeout) { - if (timeout == -EINTR) { - /* arbitration lost */ - i = -EINTR; - goto out; - } - i2c_stop(adap); - DEB2(printk(KERN_ERR "i2c-algo-pcf.o: Timeout waiting " - "for PIN(1) in pcf_xfer\n");) - i = -EREMOTEIO; - goto out; - } - - /* Check LRB (last rcvd bit - slave ack) */ - if (status & I2C_PCF_LRB) { - i2c_stop(adap); - DEB2(printk(KERN_ERR "i2c-algo-pcf.o: No LRB(1) in pcf_xfer\n");) - i = -EREMOTEIO; - goto out; - } - - DEB3(printk(KERN_DEBUG "i2c-algo-pcf.o: Msg %d, addr=0x%x, flags=0x%x, len=%d\n", - i, msgs[i].addr, msgs[i].flags, msgs[i].len);) - - if (pmsg->flags & I2C_M_RD) { - ret = pcf_readbytes(i2c_adap, pmsg->buf, pmsg->len, - (i + 1 == num)); - - if (ret != pmsg->len) { - DEB2(printk(KERN_DEBUG "i2c-algo-pcf.o: fail: " - "only read %d bytes.\n",ret)); - } else { - DEB2(printk(KERN_DEBUG "i2c-algo-pcf.o: read %d bytes.\n",ret)); - } - } else { - ret = pcf_sendbytes(i2c_adap, pmsg->buf, pmsg->len, - (i + 1 == num)); - - if (ret != pmsg->len) { - DEB2(printk(KERN_DEBUG "i2c-algo-pcf.o: fail: " - "only wrote %d bytes.\n",ret)); - } else { - DEB2(printk(KERN_DEBUG "i2c-algo-pcf.o: wrote %d bytes.\n",ret)); - } - } - } - -out: - if (adap->xfer_end) - adap->xfer_end(adap->data); - return i; -} - -static u32 pcf_func(struct i2c_adapter *adap) -{ - return I2C_FUNC_I2C | I2C_FUNC_SMBUS_EMUL | - I2C_FUNC_PROTOCOL_MANGLING; -} - -/* exported algorithm data: */ -static const struct i2c_algorithm pcf_algo = { - .master_xfer = pcf_xfer, - .functionality = pcf_func, -}; - -/* - * registering functions to load algorithms at runtime - */ -int i2c_pcf_add_bus(struct i2c_adapter *adap) -{ - struct i2c_algo_pcf_data *pcf_adap = adap->algo_data; - int rval; - - DEB2(dev_dbg(&adap->dev, "hw routines registered.\n")); - - /* register new adapter to i2c module... */ - adap->algo = &pcf_algo; - - if ((rval = pcf_init_8584(pcf_adap))) - return rval; - - rval = i2c_add_adapter(adap); - - return rval; -} -EXPORT_SYMBOL(i2c_pcf_add_bus); - -MODULE_AUTHOR("Hans Berglund <hb@spacetec.no>"); -MODULE_DESCRIPTION("I2C-Bus PCF8584 algorithm"); -MODULE_LICENSE("GPL"); - -module_param(i2c_debug, int, S_IRUGO | S_IWUSR); -MODULE_PARM_DESC(i2c_debug, - "debug level - 0 off; 1 normal; 2,3 more verbose; 9 pcf-protocol"); diff --git a/ANDROID_3.4.5/drivers/i2c/algos/i2c-algo-pcf.h b/ANDROID_3.4.5/drivers/i2c/algos/i2c-algo-pcf.h deleted file mode 100644 index 1ec703ee..00000000 --- a/ANDROID_3.4.5/drivers/i2c/algos/i2c-algo-pcf.h +++ /dev/null @@ -1,77 +0,0 @@ -/* -------------------------------------------------------------------- */ -/* i2c-pcf8584.h: PCF 8584 global defines */ -/* -------------------------------------------------------------------- */ -/* Copyright (C) 1996 Simon G. Vogl - 1999 Hans Berglund - - 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 Street, Fifth Floor, Boston, - MA 02110-1301 USA. */ -/* -------------------------------------------------------------------- */ - -/* With some changes from Frodo Looijaard <frodol@dds.nl> */ - -#ifndef I2C_PCF8584_H -#define I2C_PCF8584_H 1 - -/* ----- Control register bits ---------------------------------------- */ -#define I2C_PCF_PIN 0x80 -#define I2C_PCF_ESO 0x40 -#define I2C_PCF_ES1 0x20 -#define I2C_PCF_ES2 0x10 -#define I2C_PCF_ENI 0x08 -#define I2C_PCF_STA 0x04 -#define I2C_PCF_STO 0x02 -#define I2C_PCF_ACK 0x01 - -#define I2C_PCF_START (I2C_PCF_PIN | I2C_PCF_ESO | I2C_PCF_STA | I2C_PCF_ACK) -#define I2C_PCF_STOP (I2C_PCF_PIN | I2C_PCF_ESO | I2C_PCF_STO | I2C_PCF_ACK) -#define I2C_PCF_REPSTART ( I2C_PCF_ESO | I2C_PCF_STA | I2C_PCF_ACK) -#define I2C_PCF_IDLE (I2C_PCF_PIN | I2C_PCF_ESO | I2C_PCF_ACK) - -/* ----- Status register bits ----------------------------------------- */ -/*#define I2C_PCF_PIN 0x80 as above*/ - -#define I2C_PCF_INI 0x40 /* 1 if not initialized */ -#define I2C_PCF_STS 0x20 -#define I2C_PCF_BER 0x10 -#define I2C_PCF_AD0 0x08 -#define I2C_PCF_LRB 0x08 -#define I2C_PCF_AAS 0x04 -#define I2C_PCF_LAB 0x02 -#define I2C_PCF_BB 0x01 - -/* ----- Chip clock frequencies --------------------------------------- */ -#define I2C_PCF_CLK3 0x00 -#define I2C_PCF_CLK443 0x10 -#define I2C_PCF_CLK6 0x14 -#define I2C_PCF_CLK 0x18 -#define I2C_PCF_CLK12 0x1c - -/* ----- transmission frequencies ------------------------------------- */ -#define I2C_PCF_TRNS90 0x00 /* 90 kHz */ -#define I2C_PCF_TRNS45 0x01 /* 45 kHz */ -#define I2C_PCF_TRNS11 0x02 /* 11 kHz */ -#define I2C_PCF_TRNS15 0x03 /* 1.5 kHz */ - - -/* ----- Access to internal registers according to ES1,ES2 ------------ */ -/* they are mapped to the data port ( a0 = 0 ) */ -/* available when ESO == 0 : */ - -#define I2C_PCF_OWNADR 0 -#define I2C_PCF_INTREG I2C_PCF_ES2 -#define I2C_PCF_CLKREG I2C_PCF_ES1 - -#endif /* I2C_PCF8584_H */ diff --git a/ANDROID_3.4.5/drivers/i2c/algos/wmt-i2c-algo.c b/ANDROID_3.4.5/drivers/i2c/algos/wmt-i2c-algo.c deleted file mode 100755 index 3be850d2..00000000 --- a/ANDROID_3.4.5/drivers/i2c/algos/wmt-i2c-algo.c +++ /dev/null @@ -1,308 +0,0 @@ -/*++ - drivers/i2c/algos/wmt_i2c_algo.c - - Copyright (c) 2008 WonderMedia Technologies, Inc. - - 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, see <http://www.gnu.org/licenses/>. - - WonderMedia Technologies, Inc. - 10F, 529, Chung-Cheng Road, Hsin-Tien, Taipei 231, R.O.C. ---*/ - -#define WMT_I2C_ALGO_C - -#include <linux/kernel.h> -#include <linux/module.h> - -#include <linux/init.h> -#include <linux/delay.h> -#include <linux/errno.h> -#include <linux/i2c.h> -/* -#include <linux/i2c-id.h> -*/ - -#include <mach/hardware.h> -#include <mach/wmt-i2c-bus.h> - -#ifdef __KERNEL__ - -#ifdef DEBUG - #define DPRINTK printk -#else - #define DPRINTK(x...) -#endif - -#else -#define DPRINTK printf - -#endif - -static struct i2c_adapter *wmt_i2c_adap[5]; - -/*!************************************************************************* -* wmt_i2c_valid_messages() -* -* Private Function by Paul Kwong, 2007/1/12 -*/ -/*! -* \brief verify the input message -* -* \retval 1 if success -*/ -static int wmt_i2c_valid_messages( - struct i2c_msg msgs[], /*!<; //[IN] transfer data */ - int num /*!<; //[IN] transfer data length */ -) -{ - int i; - if (num < 1 || num > MAX_MESSAGES) { - DPRINTK(KERN_INFO "Invalid number of messages (max=%d, num=%d)\n", MAX_MESSAGES, num); - return -EINVAL; - } - - /* check consistency of our messages */ - for (i = 0; i < num; i++) { - if (&msgs[i] == NULL) { - DPRINTK(KERN_INFO "Msgs is NULL\n"); - return -EINVAL; - } else { - if (msgs[i].buf == NULL) { - DPRINTK(KERN_INFO "Length is less than zero\n"); - return -EINVAL; - } - } - } - - return 1; -} -/*!************************************************************************* -* wmt_i2c_do_xfer() -* -* Private Function by Paul Kwong, 2007/1/12 -*/ -/*! -* \brief -* -* \retval 0 if success -*/ -static int wmt_i2c_do_xfer( - struct i2c_adapter *i2c_adap, /*!<; //[IN] a pointer point to struct inode */ - struct i2c_msg msgs[], /*!<; //[IN] transfer data */ - int num /*!<; //[IN] transfer data length */ -) -{ - int i; - struct i2c_algo_wmt_data *adap; - int ret = 0 ; - - adap = i2c_adap->algo_data; - - /*ret = adap->wait_bus_not_busy();*/ - for (i = 0 ; i < 10; ++i) - ; - if (ret < 0) - return ret ; - - ret = adap->send_request(msgs, num, 0, 0, 0); - - return ret; - -} - -/*!************************************************************************* -* wmt_i2c_xfer() -* -* Private Function by Paul Kwong, 2007/1/12 -*/ -/*! -* \brief Transfer (read/write) data to i2c bus, wmt_i2c_do_xfer will be called to transfer -* -* \retval 0 if success -*/ -static int wmt_i2c_xfer( - struct i2c_adapter *i2c_adap, /*!<; //[IN] a pointer point to struct inode */ - struct i2c_msg msgs[], /*!<; //[IN] transfer data */ - int num /*!<; //[IN] transfer data length */ -) -{ - int ret ; - int i ; - - ret = wmt_i2c_valid_messages(msgs, num); - if (ret < 0) - return ret ; - - for (i = i2c_adap->retries ; i >= 0; i--) { - - ret = wmt_i2c_do_xfer(i2c_adap, msgs, num); - if (ret > 0) - return ret ; - DPRINTK(KERN_INFO"Retrying transmission \n"); - udelay(100); - } - - DPRINTK(KERN_INFO"Retried %i times\n", i2c_adap->retries); - return ret; - -} -/*!************************************************************************* -* wmt_i2c_functionality() -* -* Private Function by Paul Kwong, 2007/1/12 -*/ -/*! -* \brief -* -* \retval smbus functionality -*/ -static u32 wmt_i2c_functionality( - struct i2c_adapter *adapter /*!<; //[IN] a pointer point to struct inode */ -) -{ - /* Emulate the SMBUS functions*/ - return I2C_FUNC_I2C | I2C_FUNC_SMBUS_EMUL; -} - -/* - * send i2c_msg into fifo of i2c bus - * msg: transfer data content - * msg_num:number of transferring msg - * bus_id :used to indicate which bus do device want to access - */ -int wmt_i2c_transfer(struct i2c_msg* msgs, int msg_num, int bus_id, void (*callback)(void *data), void *data) -{ - struct i2c_algo_wmt_data *adap; - int ret = 0 ; - - adap = wmt_i2c_adap[bus_id]->algo_data; - ret = adap->send_request(msgs, msg_num, 1, callback, data); - return ret; -} - -#if 0 -/*!************************************************************************* -* wmt_i2c_control() -* -* Private Function by Paul Kwong, 2007/1/12 -*/ -/*! -* \brief To set i2c transfer mode -* -* \retval 0 if success -*/ -static int wmt_i2c_control( - struct i2c_adapter *i2c_adap, /*!<; //[IN] a pointer point to struct inode */ - unsigned int cmd, /*!<; //[IN] standard or fast mode */ - unsigned long arg /*!<; //Not in used, but can't delete */ -) -{ - int ret ; - struct i2c_algo_wmt_data *adap = i2c_adap->algo_data; - - ret = 0 ; - DPRINTK("wmt_i2c_control: cmd = 0x%8.8x \n", cmd); - - switch (cmd) { - case I2C_SET_STANDARD_MODE: - adap->set_mode(I2C_STANDARD_MODE); - break ; - case I2C_SET_FAST_MODE: - adap->set_mode(I2C_FAST_MODE); - break ; - default: - ret = -EINVAL; - break; - } - - return ret; -} -#endif - - -struct i2c_algorithm wmt_i2c_algorithm = { - .master_xfer = wmt_i2c_xfer, - .functionality = wmt_i2c_functionality, -}; -/*!************************************************************************* -* wmt_i2c_add_bus() -* -* Private Function by Paul Kwong, 2007/1/12 -*/ -/*! -* \brief -* -* \retval NULL -*/ -int wmt_i2c_add_bus(struct i2c_adapter *i2c_adap) -{ - printk(KERN_INFO"i2c: adding %s.\n", i2c_adap->name); - - i2c_adap->algo = &wmt_i2c_algorithm; - wmt_i2c_adap[i2c_adap->nr] = i2c_adap; - - /* register new adapter to i2c module... */ - /* - i2c_add_adapter(i2c_adap); - */ - i2c_add_numbered_adapter(i2c_adap); - - /* adap->reset();*/ - - return 0; -} -/*!************************************************************************* -* wmt_i2c_del_bus() -* -* Private Function by Paul Kwong, 2007/1/12 -*/ -/*! -* \brief -* -* \retval NULL -*/ -int wmt_i2c_del_bus(struct i2c_adapter *i2c_adap) -{ - int res; - res = i2c_del_adapter(i2c_adap); - if (res < 0) - return res; - - printk(KERN_INFO "i2c: removing %s.\n", i2c_adap->name); - - return 0; -} -/*!************************************************************************* -* wmt_i2c_algo_init() -* -* Private Function by Paul Kwong, 2007/1/12 -*/ -/*! -* \brief -* -* \retval NULL -*/ -static int __init wmt_i2c_algo_init(void) -{ - printk(KERN_INFO "i2c: wmt algorithm module loaded.\n"); - return 0; -} - -EXPORT_SYMBOL(wmt_i2c_add_bus); -EXPORT_SYMBOL(wmt_i2c_del_bus); - -MODULE_AUTHOR("WonderMedia Technologies, Inc."); -MODULE_DESCRIPTION("WMT I2C ALGO Driver"); -MODULE_LICENSE("GPL"); - -module_init(wmt_i2c_algo_init); - -#undef WMT_I2C_ALGO_C |