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-rw-r--r--drivers/i2c/Makefile1
-rw-r--r--drivers/i2c/busses/Kconfig58
-rw-r--r--drivers/i2c/busses/Makefile4
-rw-r--r--drivers/i2c/busses/i2c-cpm.c9
-rw-r--r--drivers/i2c/busses/i2c-diolan-u2c.c535
-rw-r--r--drivers/i2c/busses/i2c-eg20t.c162
-rw-r--r--drivers/i2c/busses/i2c-i801.c4
-rw-r--r--drivers/i2c/busses/i2c-ibm_iic.c9
-rw-r--r--drivers/i2c/busses/i2c-mpc.c22
-rw-r--r--drivers/i2c/busses/i2c-mxs.c412
-rw-r--r--drivers/i2c/busses/i2c-ocores.c19
-rw-r--r--drivers/i2c/busses/i2c-omap.c39
-rw-r--r--drivers/i2c/busses/i2c-puv3.c306
-rw-r--r--drivers/i2c/busses/i2c-pxa-pci.c176
-rw-r--r--drivers/i2c/busses/i2c-pxa.c115
-rw-r--r--drivers/i2c/busses/i2c-stu300.c2
-rw-r--r--drivers/i2c/busses/i2c-xiic.c3
-rw-r--r--drivers/i2c/i2c-boardinfo.c2
-rw-r--r--drivers/i2c/i2c-core.c30
-rw-r--r--drivers/i2c/i2c-dev.c60
20 files changed, 1795 insertions, 173 deletions
diff --git a/drivers/i2c/Makefile b/drivers/i2c/Makefile
index 23ac61e2db3..beee6b2d361 100644
--- a/drivers/i2c/Makefile
+++ b/drivers/i2c/Makefile
@@ -10,3 +10,4 @@ obj-$(CONFIG_I2C_MUX) += i2c-mux.o
obj-y += algos/ busses/ muxes/
ccflags-$(CONFIG_I2C_DEBUG_CORE) := -DDEBUG
+CFLAGS_i2c-core.o := -Wno-deprecated-declarations
diff --git a/drivers/i2c/busses/Kconfig b/drivers/i2c/busses/Kconfig
index a5f48dc3b81..326652f673f 100644
--- a/drivers/i2c/busses/Kconfig
+++ b/drivers/i2c/busses/Kconfig
@@ -98,8 +98,9 @@ config I2C_I801
EP80579 (Tolapai)
ICH10
5/3400 Series (PCH)
- Cougar Point (PCH)
+ 6 Series (PCH)
Patsburg (PCH)
+ DH89xxCC (PCH)
This driver can also be built as a module. If so, the module
will be called i2c-i801.
@@ -433,7 +434,7 @@ config I2C_IXP2000
config I2C_MPC
tristate "MPC107/824x/85xx/512x/52xx/83xx/86xx"
- depends on PPC32
+ depends on PPC
help
If you say yes to this option, support will be included for the
built-in I2C interface on the MPC107, Tsi107, MPC512x, MPC52xx,
@@ -452,6 +453,16 @@ config I2C_MV64XXX
This driver can also be built as a module. If so, the module
will be called i2c-mv64xxx.
+config I2C_MXS
+ tristate "Freescale i.MX28 I2C interface"
+ depends on SOC_IMX28
+ help
+ Say Y here if you want to use the I2C bus controller on
+ the Freescale i.MX28 processors.
+
+ This driver can also be built as a module. If so, the module
+ will be called i2c-mxs.
+
config I2C_NOMADIK
tristate "ST-Ericsson Nomadik/Ux500 I2C Controller"
depends on PLAT_NOMADIK
@@ -523,17 +534,31 @@ config I2C_PNX
This driver can also be built as a module. If so, the module
will be called i2c-pnx.
+config I2C_PUV3
+ tristate "PKUnity v3 I2C bus support"
+ depends on UNICORE32 && ARCH_PUV3
+ select I2C_ALGOBIT
+ help
+ This driver supports the I2C IP inside the PKUnity-v3 SoC.
+ This I2C bus controller is under AMBA/AXI bus.
+
+ This driver can also be built as a module. If so, the module
+ will be called i2c-puv3.
+
config I2C_PXA
tristate "Intel PXA2XX I2C adapter"
- depends on ARCH_PXA || ARCH_MMP
+ depends on ARCH_PXA || ARCH_MMP || (X86_32 && PCI && OF)
help
If you have devices in the PXA I2C bus, say yes to this option.
This driver can also be built as a module. If so, the module
will be called i2c-pxa.
+config I2C_PXA_PCI
+ def_bool I2C_PXA && X86_32 && PCI && OF
+
config I2C_PXA_SLAVE
bool "Intel PXA2XX I2C Slave comms support"
- depends on I2C_PXA
+ depends on I2C_PXA && !X86_32
help
Support I2C slave mode communications on the PXA I2C bus. This
is necessary for systems where the PXA may be a target on the
@@ -646,15 +671,28 @@ config I2C_XILINX
will be called xilinx_i2c.
config I2C_EG20T
- tristate "PCH I2C of Intel EG20T"
- depends on PCI
- help
- This driver is for PCH(Platform controller Hub) I2C of EG20T which
- is an IOH(Input/Output Hub) for x86 embedded processor.
- This driver can access PCH I2C bus device.
+ tristate "Intel EG20T PCH/OKI SEMICONDUCTOR ML7213 IOH"
+ depends on PCI
+ help
+ This driver is for PCH(Platform controller Hub) I2C of EG20T which
+ is an IOH(Input/Output Hub) for x86 embedded processor.
+ This driver can access PCH I2C bus device.
+
+ This driver also supports the ML7213, a companion chip for the
+ Atom E6xx series and compatible with the Intel EG20T PCH.
comment "External I2C/SMBus adapter drivers"
+config I2C_DIOLAN_U2C
+ tristate "Diolan U2C-12 USB adapter"
+ depends on USB
+ help
+ If you say yes to this option, support will be included for Diolan
+ U2C-12, a USB to I2C interface.
+
+ This driver can also be built as a module. If so, the module
+ will be called i2c-diolan-u2c.
+
config I2C_PARPORT
tristate "Parallel port adapter"
depends on PARPORT
diff --git a/drivers/i2c/busses/Makefile b/drivers/i2c/busses/Makefile
index a0d4afe05ea..e6cf294d372 100644
--- a/drivers/i2c/busses/Makefile
+++ b/drivers/i2c/busses/Makefile
@@ -43,6 +43,7 @@ obj-$(CONFIG_I2C_IOP3XX) += i2c-iop3xx.o
obj-$(CONFIG_I2C_IXP2000) += i2c-ixp2000.o
obj-$(CONFIG_I2C_MPC) += i2c-mpc.o
obj-$(CONFIG_I2C_MV64XXX) += i2c-mv64xxx.o
+obj-$(CONFIG_I2C_MXS) += i2c-mxs.o
obj-$(CONFIG_I2C_NOMADIK) += i2c-nomadik.o
obj-$(CONFIG_I2C_NUC900) += i2c-nuc900.o
obj-$(CONFIG_I2C_OCORES) += i2c-ocores.o
@@ -51,7 +52,9 @@ obj-$(CONFIG_I2C_PASEMI) += i2c-pasemi.o
obj-$(CONFIG_I2C_PCA_PLATFORM) += i2c-pca-platform.o
obj-$(CONFIG_I2C_PMCMSP) += i2c-pmcmsp.o
obj-$(CONFIG_I2C_PNX) += i2c-pnx.o
+obj-$(CONFIG_I2C_PUV3) += i2c-puv3.o
obj-$(CONFIG_I2C_PXA) += i2c-pxa.o
+obj-$(CONFIG_I2C_PXA_PCI) += i2c-pxa-pci.o
obj-$(CONFIG_I2C_S3C2410) += i2c-s3c2410.o
obj-$(CONFIG_I2C_S6000) += i2c-s6000.o
obj-$(CONFIG_I2C_SH7760) += i2c-sh7760.o
@@ -65,6 +68,7 @@ obj-$(CONFIG_I2C_XILINX) += i2c-xiic.o
obj-$(CONFIG_I2C_EG20T) += i2c-eg20t.o
# External I2C/SMBus adapter drivers
+obj-$(CONFIG_I2C_DIOLAN_U2C) += i2c-diolan-u2c.o
obj-$(CONFIG_I2C_PARPORT) += i2c-parport.o
obj-$(CONFIG_I2C_PARPORT_LIGHT) += i2c-parport-light.o
obj-$(CONFIG_I2C_TAOS_EVM) += i2c-taos-evm.o
diff --git a/drivers/i2c/busses/i2c-cpm.c b/drivers/i2c/busses/i2c-cpm.c
index f2de3be35df..3a20961bef1 100644
--- a/drivers/i2c/busses/i2c-cpm.c
+++ b/drivers/i2c/busses/i2c-cpm.c
@@ -634,8 +634,7 @@ static void cpm_i2c_shutdown(struct cpm_i2c *cpm)
cpm_muram_free(cpm->i2c_addr);
}
-static int __devinit cpm_i2c_probe(struct platform_device *ofdev,
- const struct of_device_id *match)
+static int __devinit cpm_i2c_probe(struct platform_device *ofdev)
{
int result, len;
struct cpm_i2c *cpm;
@@ -718,7 +717,7 @@ static const struct of_device_id cpm_i2c_match[] = {
MODULE_DEVICE_TABLE(of, cpm_i2c_match);
-static struct of_platform_driver cpm_i2c_driver = {
+static struct platform_driver cpm_i2c_driver = {
.probe = cpm_i2c_probe,
.remove = __devexit_p(cpm_i2c_remove),
.driver = {
@@ -730,12 +729,12 @@ static struct of_platform_driver cpm_i2c_driver = {
static int __init cpm_i2c_init(void)
{
- return of_register_platform_driver(&cpm_i2c_driver);
+ return platform_driver_register(&cpm_i2c_driver);
}
static void __exit cpm_i2c_exit(void)
{
- of_unregister_platform_driver(&cpm_i2c_driver);
+ platform_driver_unregister(&cpm_i2c_driver);
}
module_init(cpm_i2c_init);
diff --git a/drivers/i2c/busses/i2c-diolan-u2c.c b/drivers/i2c/busses/i2c-diolan-u2c.c
new file mode 100644
index 00000000000..76366716a85
--- /dev/null
+++ b/drivers/i2c/busses/i2c-diolan-u2c.c
@@ -0,0 +1,535 @@
+/*
+ * Driver for the Diolan u2c-12 USB-I2C adapter
+ *
+ * Copyright (c) 2010-2011 Ericsson AB
+ *
+ * Derived from:
+ * i2c-tiny-usb.c
+ * Copyright (C) 2006-2007 Till Harbaum (Till@Harbaum.org)
+ *
+ * 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, version 2.
+ */
+
+#include <linux/kernel.h>
+#include <linux/errno.h>
+#include <linux/module.h>
+#include <linux/types.h>
+#include <linux/slab.h>
+#include <linux/usb.h>
+#include <linux/i2c.h>
+
+#define DRIVER_NAME "i2c-diolan-u2c"
+
+#define USB_VENDOR_ID_DIOLAN 0x0abf
+#define USB_DEVICE_ID_DIOLAN_U2C 0x3370
+
+#define DIOLAN_OUT_EP 0x02
+#define DIOLAN_IN_EP 0x84
+
+/* commands via USB, must match command ids in the firmware */
+#define CMD_I2C_READ 0x01
+#define CMD_I2C_WRITE 0x02
+#define CMD_I2C_SCAN 0x03 /* Returns list of detected devices */
+#define CMD_I2C_RELEASE_SDA 0x04
+#define CMD_I2C_RELEASE_SCL 0x05
+#define CMD_I2C_DROP_SDA 0x06
+#define CMD_I2C_DROP_SCL 0x07
+#define CMD_I2C_READ_SDA 0x08
+#define CMD_I2C_READ_SCL 0x09
+#define CMD_GET_FW_VERSION 0x0a
+#define CMD_GET_SERIAL 0x0b
+#define CMD_I2C_START 0x0c
+#define CMD_I2C_STOP 0x0d
+#define CMD_I2C_REPEATED_START 0x0e
+#define CMD_I2C_PUT_BYTE 0x0f
+#define CMD_I2C_GET_BYTE 0x10
+#define CMD_I2C_PUT_ACK 0x11
+#define CMD_I2C_GET_ACK 0x12
+#define CMD_I2C_PUT_BYTE_ACK 0x13
+#define CMD_I2C_GET_BYTE_ACK 0x14
+#define CMD_I2C_SET_SPEED 0x1b
+#define CMD_I2C_GET_SPEED 0x1c
+#define CMD_I2C_SET_CLK_SYNC 0x24
+#define CMD_I2C_GET_CLK_SYNC 0x25
+#define CMD_I2C_SET_CLK_SYNC_TO 0x26
+#define CMD_I2C_GET_CLK_SYNC_TO 0x27
+
+#define RESP_OK 0x00
+#define RESP_FAILED 0x01
+#define RESP_BAD_MEMADDR 0x04
+#define RESP_DATA_ERR 0x05
+#define RESP_NOT_IMPLEMENTED 0x06
+#define RESP_NACK 0x07
+#define RESP_TIMEOUT 0x09
+
+#define U2C_I2C_SPEED_FAST 0 /* 400 kHz */
+#define U2C_I2C_SPEED_STD 1 /* 100 kHz */
+#define U2C_I2C_SPEED_2KHZ 242 /* 2 kHz, minimum speed */
+#define U2C_I2C_SPEED(f) ((DIV_ROUND_UP(1000000, (f)) - 10) / 2 + 1)
+
+#define U2C_I2C_FREQ_FAST 400000
+#define U2C_I2C_FREQ_STD 100000
+#define U2C_I2C_FREQ(s) (1000000 / (2 * (s - 1) + 10))
+
+#define DIOLAN_USB_TIMEOUT 100 /* in ms */
+#define DIOLAN_SYNC_TIMEOUT 20 /* in ms */
+
+#define DIOLAN_OUTBUF_LEN 128
+#define DIOLAN_FLUSH_LEN (DIOLAN_OUTBUF_LEN - 4)
+#define DIOLAN_INBUF_LEN 256 /* Maximum supported receive length */
+
+/* Structure to hold all of our device specific stuff */
+struct i2c_diolan_u2c {
+ u8 obuffer[DIOLAN_OUTBUF_LEN]; /* output buffer */
+ u8 ibuffer[DIOLAN_INBUF_LEN]; /* input buffer */
+ struct usb_device *usb_dev; /* the usb device for this device */
+ struct usb_interface *interface;/* the interface for this device */
+ struct i2c_adapter adapter; /* i2c related things */
+ int olen; /* Output buffer length */
+ int ocount; /* Number of enqueued messages */
+};
+
+static uint frequency = U2C_I2C_FREQ_STD; /* I2C clock frequency in Hz */
+
+module_param(frequency, uint, S_IRUGO | S_IWUSR);
+MODULE_PARM_DESC(frequency, "I2C clock frequency in hertz");
+
+/* usb layer */
+
+/* Send command to device, and get response. */
+static int diolan_usb_transfer(struct i2c_diolan_u2c *dev)
+{
+ int ret = 0;
+ int actual;
+ int i;
+
+ if (!dev->olen || !dev->ocount)
+ return -EINVAL;
+
+ ret = usb_bulk_msg(dev->usb_dev,
+ usb_sndbulkpipe(dev->usb_dev, DIOLAN_OUT_EP),
+ dev->obuffer, dev->olen, &actual,
+ DIOLAN_USB_TIMEOUT);
+ if (!ret) {
+ for (i = 0; i < dev->ocount; i++) {
+ int tmpret;
+
+ tmpret = usb_bulk_msg(dev->usb_dev,
+ usb_rcvbulkpipe(dev->usb_dev,
+ DIOLAN_IN_EP),
+ dev->ibuffer,
+ sizeof(dev->ibuffer), &actual,
+ DIOLAN_USB_TIMEOUT);
+ /*
+ * Stop command processing if a previous command
+ * returned an error.
+ * Note that we still need to retrieve all messages.
+ */
+ if (ret < 0)
+ continue;
+ ret = tmpret;
+ if (ret == 0 && actual > 0) {
+ switch (dev->ibuffer[actual - 1]) {
+ case RESP_NACK:
+ /*
+ * Return ENXIO if NACK was received as
+ * response to the address phase,
+ * EIO otherwise
+ */
+ ret = i == 1 ? -ENXIO : -EIO;
+ break;
+ case RESP_TIMEOUT:
+ ret = -ETIMEDOUT;
+ break;
+ case RESP_OK:
+ /* strip off return code */
+ ret = actual - 1;
+ break;
+ default:
+ ret = -EIO;
+ break;
+ }
+ }
+ }
+ }
+ dev->olen = 0;
+ dev->ocount = 0;
+ return ret;
+}
+
+static int diolan_write_cmd(struct i2c_diolan_u2c *dev, bool flush)
+{
+ if (flush || dev->olen >= DIOLAN_FLUSH_LEN)
+ return diolan_usb_transfer(dev);
+ return 0;
+}
+
+/* Send command (no data) */
+static int diolan_usb_cmd(struct i2c_diolan_u2c *dev, u8 command, bool flush)
+{
+ dev->obuffer[dev->olen++] = command;
+ dev->ocount++;
+ return diolan_write_cmd(dev, flush);
+}
+
+/* Send command with one byte of data */
+static int diolan_usb_cmd_data(struct i2c_diolan_u2c *dev, u8 command, u8 data,
+ bool flush)
+{
+ dev->obuffer[dev->olen++] = command;
+ dev->obuffer[dev->olen++] = data;
+ dev->ocount++;
+ return diolan_write_cmd(dev, flush);
+}
+
+/* Send command with two bytes of data */
+static int diolan_usb_cmd_data2(struct i2c_diolan_u2c *dev, u8 command, u8 d1,
+ u8 d2, bool flush)
+{
+ dev->obuffer[dev->olen++] = command;
+ dev->obuffer[dev->olen++] = d1;
+ dev->obuffer[dev->olen++] = d2;
+ dev->ocount++;
+ return diolan_write_cmd(dev, flush);
+}
+
+/*
+ * Flush input queue.
+ * If we don't do this at startup and the controller has queued up
+ * messages which were not retrieved, it will stop responding
+ * at some point.
+ */
+static void diolan_flush_input(struct i2c_diolan_u2c *dev)
+{
+ int i;
+
+ for (i = 0; i < 10; i++) {
+ int actual = 0;
+ int ret;
+
+ ret = usb_bulk_msg(dev->usb_dev,
+ usb_rcvbulkpipe(dev->usb_dev, DIOLAN_IN_EP),
+ dev->ibuffer, sizeof(dev->ibuffer), &actual,
+ DIOLAN_USB_TIMEOUT);
+ if (ret < 0 || actual == 0)
+ break;
+ }
+ if (i == 10)
+ dev_err(&dev->interface->dev, "Failed to flush input buffer\n");
+}
+
+static int diolan_i2c_start(struct i2c_diolan_u2c *dev)
+{
+ return diolan_usb_cmd(dev, CMD_I2C_START, false);
+}
+
+static int diolan_i2c_repeated_start(struct i2c_diolan_u2c *dev)
+{
+ return diolan_usb_cmd(dev, CMD_I2C_REPEATED_START, false);
+}
+
+static int diolan_i2c_stop(struct i2c_diolan_u2c *dev)
+{
+ return diolan_usb_cmd(dev, CMD_I2C_STOP, true);
+}
+
+static int diolan_i2c_get_byte_ack(struct i2c_diolan_u2c *dev, bool ack,
+ u8 *byte)
+{
+ int ret;
+
+ ret = diolan_usb_cmd_data(dev, CMD_I2C_GET_BYTE_ACK, ack, true);
+ if (ret > 0)
+ *byte = dev->ibuffer[0];
+ else if (ret == 0)
+ ret = -EIO;
+
+ return ret;
+}
+
+static int diolan_i2c_put_byte_ack(struct i2c_diolan_u2c *dev, u8 byte)
+{
+ return diolan_usb_cmd_data(dev, CMD_I2C_PUT_BYTE_ACK, byte, false);
+}
+
+static int diolan_set_speed(struct i2c_diolan_u2c *dev, u8 speed)
+{
+ return diolan_usb_cmd_data(dev, CMD_I2C_SET_SPEED, speed, true);
+}
+
+/* Enable or disable clock synchronization (stretching) */
+static int diolan_set_clock_synch(struct i2c_diolan_u2c *dev, bool enable)
+{
+ return diolan_usb_cmd_data(dev, CMD_I2C_SET_CLK_SYNC, enable, true);
+}
+
+/* Set clock synchronization timeout in ms */
+static int diolan_set_clock_synch_timeout(struct i2c_diolan_u2c *dev, int ms)
+{
+ int to_val = ms * 10;
+
+ return diolan_usb_cmd_data2(dev, CMD_I2C_SET_CLK_SYNC_TO,
+ to_val & 0xff, (to_val >> 8) & 0xff, true);
+}
+
+static void diolan_fw_version(struct i2c_diolan_u2c *dev)
+{
+ int ret;
+
+ ret = diolan_usb_cmd(dev, CMD_GET_FW_VERSION, true);
+ if (ret >= 2)
+ dev_info(&dev->interface->dev,
+ "Diolan U2C firmware version %u.%u\n",
+ (unsigned int)dev->ibuffer[0],
+ (unsigned int)dev->ibuffer[1]);
+}
+
+static void diolan_get_serial(struct i2c_diolan_u2c *dev)
+{
+ int ret;
+ u32 serial;
+
+ ret = diolan_usb_cmd(dev, CMD_GET_SERIAL, true);
+ if (ret >= 4) {
+ serial = le32_to_cpu(*(u32 *)dev->ibuffer);
+ dev_info(&dev->interface->dev,
+ "Diolan U2C serial number %u\n", serial);
+ }
+}
+
+static int diolan_init(struct i2c_diolan_u2c *dev)
+{
+ int speed, ret;
+
+ if (frequency >= 200000) {
+ speed = U2C_I2C_SPEED_FAST;
+ frequency = U2C_I2C_FREQ_FAST;
+ } else if (frequency >= 100000 || frequency == 0) {
+ speed = U2C_I2C_SPEED_STD;
+ frequency = U2C_I2C_FREQ_STD;
+ } else {
+ speed = U2C_I2C_SPEED(frequency);
+ if (speed > U2C_I2C_SPEED_2KHZ)
+ speed = U2C_I2C_SPEED_2KHZ;
+ frequency = U2C_I2C_FREQ(speed);
+ }
+
+ dev_info(&dev->interface->dev,
+ "Diolan U2C at USB bus %03d address %03d speed %d Hz\n",
+ dev->usb_dev->bus->busnum, dev->usb_dev->devnum, frequency);
+
+ diolan_flush_input(dev);
+ diolan_fw_version(dev);
+ diolan_get_serial(dev);
+
+ /* Set I2C speed */
+ ret = diolan_set_speed(dev, speed);
+ if (ret < 0)
+ return ret;
+
+ /* Configure I2C clock synchronization */
+ ret = diolan_set_clock_synch(dev, speed != U2C_I2C_SPEED_FAST);
+ if (ret < 0)
+ return ret;
+
+ if (speed != U2C_I2C_SPEED_FAST)
+ ret = diolan_set_clock_synch_timeout(dev, DIOLAN_SYNC_TIMEOUT);
+
+ return ret;
+}
+
+/* i2c layer */
+
+static int diolan_usb_xfer(struct i2c_adapter *adapter, struct i2c_msg *msgs,
+ int num)
+{
+ struct i2c_diolan_u2c *dev = i2c_get_adapdata(adapter);
+ struct i2c_msg *pmsg;
+ int i, j;
+ int ret, sret;
+
+ ret = diolan_i2c_start(dev);
+ if (ret < 0)
+ return ret;
+
+ for (i = 0; i < num; i++) {
+ pmsg = &msgs[i];
+ if (i) {
+ ret = diolan_i2c_repeated_start(dev);
+ if (ret < 0)
+ goto abort;
+ }
+ if (pmsg->flags & I2C_M_RD) {
+ ret =
+ diolan_i2c_put_byte_ack(dev, (pmsg->addr << 1) | 1);
+ if (ret < 0)
+ goto abort;
+ for (j = 0; j < pmsg->len; j++) {
+ u8 byte;
+ bool ack = j < pmsg->len - 1;
+
+ /*
+ * Don't send NACK if this is the first byte
+ * of a SMBUS_BLOCK message.
+ */
+ if (j == 0 && (pmsg->flags & I2C_M_RECV_LEN))
+ ack = true;
+
+ ret = diolan_i2c_get_byte_ack(dev, ack, &byte);
+ if (ret < 0)
+ goto abort;
+ /*
+ * Adjust count if first received byte is length
+ */
+ if (j == 0 && (pmsg->flags & I2C_M_RECV_LEN)) {
+ if (byte == 0
+ || byte > I2C_SMBUS_BLOCK_MAX) {
+ ret = -EPROTO;
+ goto abort;
+ }
+ pmsg->len += byte;
+ }
+ pmsg->buf[j] = byte;
+ }
+ } else {
+ ret = diolan_i2c_put_byte_ack(dev, pmsg->addr << 1);
+ if (ret < 0)
+ goto abort;
+ for (j = 0; j < pmsg->len; j++) {
+ ret = diolan_i2c_put_byte_ack(dev,
+ pmsg->buf[j]);
+ if (ret < 0)
+ goto abort;
+ }
+ }
+ }
+abort:
+ sret = diolan_i2c_stop(dev);
+ if (sret < 0 && ret >= 0)
+ ret = sret;
+ return ret;
+}
+
+/*
+ * Return list of supported functionality.
+ */
+static u32 diolan_usb_func(struct i2c_adapter *a)
+{
+ return I2C_FUNC_I2C | I2C_FUNC_SMBUS_EMUL |
+ I2C_FUNC_SMBUS_READ_BLOCK_DATA | I2C_FUNC_SMBUS_BLOCK_PROC_CALL;
+}
+
+static const struct i2c_algorithm diolan_usb_algorithm = {
+ .master_xfer = diolan_usb_xfer,
+ .functionality = diolan_usb_func,
+};
+
+/* device layer */
+
+static const struct usb_device_id diolan_u2c_table[] = {
+ { USB_DEVICE(USB_VENDOR_ID_DIOLAN, USB_DEVICE_ID_DIOLAN_U2C) },
+ { }
+};
+
+MODULE_DEVICE_TABLE(usb, diolan_u2c_table);
+
+static void diolan_u2c_free(struct i2c_diolan_u2c *dev)
+{
+ usb_put_dev(dev->usb_dev);
+ kfree(dev);
+}
+
+static int diolan_u2c_probe(struct usb_interface *interface,
+ const struct usb_device_id *id)
+{
+ struct i2c_diolan_u2c *dev;
+ int ret;
+
+ /* allocate memory for our device state and initialize it */
+ dev = kzalloc(sizeof(*dev), GFP_KERNEL);
+ if (dev == NULL) {
+ dev_err(&interface->dev, "no memory for device state\n");
+ ret = -ENOMEM;
+ goto error;
+ }
+
+ dev->usb_dev = usb_get_dev(interface_to_usbdev(interface));
+ dev->interface = interface;
+
+ /* save our data pointer in this interface device */
+ usb_set_intfdata(interface, dev);
+
+ /* setup i2c adapter description */
+ dev->adapter.owner = THIS_MODULE;
+ dev->adapter.class = I2C_CLASS_HWMON;
+ dev->adapter.algo = &diolan_usb_algorithm;
+ i2c_set_adapdata(&dev->adapter, dev);
+ snprintf(dev->adapter.name, sizeof(dev->adapter.name),
+ DRIVER_NAME " at bus %03d device %03d",
+ dev->usb_dev->bus->busnum, dev->usb_dev->devnum);
+
+ dev->adapter.dev.parent = &dev->interface->dev;
+
+ /* initialize diolan i2c interface */
+ ret = diolan_init(dev);
+ if (ret < 0) {
+ dev_err(&interface->dev, "failed to initialize adapter\n");
+ goto error_free;
+ }
+
+ /* and finally attach to i2c layer */
+ ret = i2c_add_adapter(&dev->adapter);
+ if (ret < 0) {
+ dev_err(&interface->dev, "failed to add I2C adapter\n");
+ goto error_free;
+ }
+
+ dev_dbg(&interface->dev, "connected " DRIVER_NAME "\n");
+
+ return 0;
+
+error_free:
+ usb_set_intfdata(interface, NULL);
+ diolan_u2c_free(dev);
+error:
+ return ret;
+}
+
+static void diolan_u2c_disconnect(struct usb_interface *interface)
+{
+ struct i2c_diolan_u2c *dev = usb_get_intfdata(interface);
+
+ i2c_del_adapter(&dev->adapter);
+ usb_set_intfdata(interface, NULL);
+ diolan_u2c_free(dev);
+
+ dev_dbg(&interface->dev, "disconnected\n");
+}
+
+static struct usb_driver diolan_u2c_driver = {
+ .name = DRIVER_NAME,
+ .probe = diolan_u2c_probe,
+ .disconnect = diolan_u2c_disconnect,
+ .id_table = diolan_u2c_table,
+};
+
+static int __init diolan_u2c_init(void)
+{
+ /* register this driver with the USB subsystem */
+ return usb_register(&diolan_u2c_driver);
+}
+
+static void __exit diolan_u2c_exit(void)
+{
+ /* deregister this driver with the USB subsystem */
+ usb_deregister(&diolan_u2c_driver);
+}
+
+module_init(diolan_u2c_init);
+module_exit(diolan_u2c_exit);
+
+MODULE_AUTHOR("Guenter Roeck <guenter.roeck@ericsson.com>");
+MODULE_DESCRIPTION(DRIVER_NAME " driver");
+MODULE_LICENSE("GPL");
diff --git a/drivers/i2c/busses/i2c-eg20t.c b/drivers/i2c/busses/i2c-eg20t.c
index 2e067dd2ee5..878a12026af 100644
--- a/drivers/i2c/busses/i2c-eg20t.c
+++ b/drivers/i2c/busses/i2c-eg20t.c
@@ -29,6 +29,7 @@
#include <linux/pci.h>
#include <linux/mutex.h>
#include <linux/ktime.h>
+#include <linux/slab.h>
#define PCH_EVENT_SET 0 /* I2C Interrupt Event Set Status */
#define PCH_EVENT_NONE 1 /* I2C Interrupt Event Clear Status */
@@ -131,6 +132,13 @@
#define pch_pci_dbg(pdev, fmt, arg...) \
dev_dbg(&pdev->dev, "%s :" fmt, __func__, ##arg)
+/*
+Set the number of I2C instance max
+Intel EG20T PCH : 1ch
+OKI SEMICONDUCTOR ML7213 IOH : 2ch
+*/
+#define PCH_I2C_MAX_DEV 2
+
/**
* struct i2c_algo_pch_data - for I2C driver functionalities
* @pch_adapter: stores the reference to i2c_adapter structure
@@ -155,12 +163,14 @@ struct i2c_algo_pch_data {
* @pch_data: stores a list of i2c_algo_pch_data
* @pch_i2c_suspended: specifies whether the system is suspended or not
* perhaps with more lines and words.
+ * @ch_num: specifies the number of i2c instance
*
* pch_data has as many elements as maximum I2C channels
*/
struct adapter_info {
- struct i2c_algo_pch_data pch_data;
+ struct i2c_algo_pch_data pch_data[PCH_I2C_MAX_DEV];
bool pch_i2c_suspended;
+ int ch_num;
};
@@ -169,8 +179,13 @@ static int pch_clk = 50000; /* specifies I2C clock speed in KHz */
static wait_queue_head_t pch_event;
static DEFINE_MUTEX(pch_mutex);
+/* Definition for ML7213 by OKI SEMICONDUCTOR */
+#define PCI_VENDOR_ID_ROHM 0x10DB
+#define PCI_DEVICE_ID_ML7213_I2C 0x802D
+
static struct pci_device_id __devinitdata pch_pcidev_id[] = {
- {PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_PCH_I2C)},
+ { PCI_VDEVICE(INTEL, PCI_DEVICE_ID_PCH_I2C), 1, },
+ { PCI_VDEVICE(ROHM, PCI_DEVICE_ID_ML7213_I2C), 2, },
{0,}
};
@@ -211,8 +226,7 @@ static void pch_i2c_init(struct i2c_algo_pch_data *adap)
/* Initialize I2C registers */
iowrite32(0x21, p + PCH_I2CNF);
- pch_setbit(adap->pch_base_address, PCH_I2CCTL,
- PCH_I2CCTL_I2CMEN);
+ pch_setbit(adap->pch_base_address, PCH_I2CCTL, PCH_I2CCTL_I2CMEN);
if (pch_i2c_speed != 400)
pch_i2c_speed = 100;
@@ -254,7 +268,7 @@ static inline bool ktime_lt(const ktime_t cmp1, const ktime_t cmp2)
* @timeout: waiting time counter (us).
*/
static s32 pch_i2c_wait_for_bus_idle(struct i2c_algo_pch_data *adap,
- s32 timeout)
+ s32 timeout)
{
void __iomem *p = adap->pch_base_address;
@@ -474,8 +488,8 @@ static void pch_i2c_sendnack(struct i2c_algo_pch_data *adap)
* @last: specifies whether last message or not.
* @first: specifies whether first message or not.
*/
-s32 pch_i2c_readbytes(struct i2c_adapter *i2c_adap, struct i2c_msg *msgs,
- u32 last, u32 first)
+static s32 pch_i2c_readbytes(struct i2c_adapter *i2c_adap, struct i2c_msg *msgs,
+ u32 last, u32 first)
{
struct i2c_algo_pch_data *adap = i2c_adap->algo_data;
@@ -568,10 +582,10 @@ s32 pch_i2c_readbytes(struct i2c_adapter *i2c_adap, struct i2c_msg *msgs,
}
/**
- * pch_i2c_cb_ch0() - Interrupt handler Call back function
+ * pch_i2c_cb() - Interrupt handler Call back function
* @adap: Pointer to struct i2c_algo_pch_data.
*/
-static void pch_i2c_cb_ch0(struct i2c_algo_pch_data *adap)
+static void pch_i2c_cb(struct i2c_algo_pch_data *adap)
{
u32 sts;
void __iomem *p = adap->pch_base_address;
@@ -599,24 +613,30 @@ static void pch_i2c_cb_ch0(struct i2c_algo_pch_data *adap)
*/
static irqreturn_t pch_i2c_handler(int irq, void *pData)
{
- s32 reg_val;
-
- struct i2c_algo_pch_data *adap_data = (struct i2c_algo_pch_data *)pData;
- void __iomem *p = adap_data->pch_base_address;
- u32 mode = ioread32(p + PCH_I2CMOD) & (BUFFER_MODE | EEPROM_SR_MODE);
-
- if (mode != NORMAL_MODE) {
- pch_err(adap_data, "I2C mode is not supported\n");
- return IRQ_NONE;
+ u32 reg_val;
+ int flag;
+ int i;
+ struct adapter_info *adap_info = pData;
+ void __iomem *p;
+ u32 mode;
+
+ for (i = 0, flag = 0; i < adap_info->ch_num; i++) {
+ p = adap_info->pch_data[i].pch_base_address;
+ mode = ioread32(p + PCH_I2CMOD);
+ mode &= BUFFER_MODE | EEPROM_SR_MODE;
+ if (mode != NORMAL_MODE) {
+ pch_err(adap_info->pch_data,
+ "I2C-%d mode(%d) is not supported\n", mode, i);
+ continue;
+ }
+ reg_val = ioread32(p + PCH_I2CSR);
+ if (reg_val & (I2CMAL_BIT | I2CMCF_BIT | I2CMIF_BIT)) {
+ pch_i2c_cb(&adap_info->pch_data[i]);
+ flag = 1;
+ }
}
- reg_val = ioread32(p + PCH_I2CSR);
- if (reg_val & (I2CMAL_BIT | I2CMCF_BIT | I2CMIF_BIT))
- pch_i2c_cb_ch0(adap_data);
- else
- return IRQ_NONE;
-
- return IRQ_HANDLED;
+ return flag ? IRQ_HANDLED : IRQ_NONE;
}
/**
@@ -626,7 +646,7 @@ static irqreturn_t pch_i2c_handler(int irq, void *pData)
* @num: number of messages.
*/
static s32 pch_i2c_xfer(struct i2c_adapter *i2c_adap,
- struct i2c_msg *msgs, s32 num)
+ struct i2c_msg *msgs, s32 num)
{
struct i2c_msg *pmsg;
u32 i = 0;
@@ -709,11 +729,13 @@ static void pch_i2c_disbl_int(struct i2c_algo_pch_data *adap)
}
static int __devinit pch_i2c_probe(struct pci_dev *pdev,
- const struct pci_device_id *id)
+ const struct pci_device_id *id)
{
void __iomem *base_addr;
- s32 ret;
+ int ret;
+ int i, j;
struct adapter_info *adap_info;
+ struct i2c_adapter *pch_adap;
pch_pci_dbg(pdev, "Entered.\n");
@@ -743,44 +765,48 @@ static int __devinit pch_i2c_probe(struct pci_dev *pdev,
goto err_pci_iomap;
}
- adap_info->pch_i2c_suspended = false;
+ /* Set the number of I2C channel instance */
+ adap_info->ch_num = id->driver_data;
- adap_info->pch_data.p_adapter_info = adap_info;
+ for (i = 0; i < adap_info->ch_num; i++) {
+ pch_adap = &adap_info->pch_data[i].pch_adapter;
+ adap_info->pch_i2c_suspended = false;
- adap_info->pch_data.pch_adapter.owner = THIS_MODULE;
- adap_info->pch_data.pch_adapter.class = I2C_CLASS_HWMON;
- strcpy(adap_info->pch_data.pch_adapter.name, KBUILD_MODNAME);
- adap_info->pch_data.pch_adapter.algo = &pch_algorithm;
- adap_info->pch_data.pch_adapter.algo_data =
- &adap_info->pch_data;
+ adap_info->pch_data[i].p_adapter_info = adap_info;
- /* (i * 0x80) + base_addr; */
- adap_info->pch_data.pch_base_address = base_addr;
+ pch_adap->owner = THIS_MODULE;
+ pch_adap->class = I2C_CLASS_HWMON;
+ strcpy(pch_adap->name, KBUILD_MODNAME);
+ pch_adap->algo = &pch_algorithm;
+ pch_adap->algo_data = &adap_info->pch_data[i];
- adap_info->pch_data.pch_adapter.dev.parent = &pdev->dev;
+ /* base_addr + offset; */
+ adap_info->pch_data[i].pch_base_address = base_addr + 0x100 * i;
- ret = i2c_add_adapter(&(adap_info->pch_data.pch_adapter));
+ pch_adap->dev.parent = &pdev->dev;
- if (ret) {
- pch_pci_err(pdev, "i2c_add_adapter FAILED\n");
- goto err_i2c_add_adapter;
- }
+ ret = i2c_add_adapter(pch_adap);
+ if (ret) {
+ pch_pci_err(pdev, "i2c_add_adapter[ch:%d] FAILED\n", i);
+ goto err_i2c_add_adapter;
+ }
- pch_i2c_init(&adap_info->pch_data);
+ pch_i2c_init(&adap_info->pch_data[i]);
+ }
ret = request_irq(pdev->irq, pch_i2c_handler, IRQF_SHARED,
- KBUILD_MODNAME, &adap_info->pch_data);
+ KBUILD_MODNAME, adap_info);
if (ret) {
pch_pci_err(pdev, "request_irq FAILED\n");
- goto err_request_irq;
+ goto err_i2c_add_adapter;
}
pci_set_drvdata(pdev, adap_info);
pch_pci_dbg(pdev, "returns %d.\n", ret);
return 0;
-err_request_irq:
- i2c_del_adapter(&(adap_info->pch_data.pch_adapter));
err_i2c_add_adapter:
+ for (j = 0; j < i; j++)
+ i2c_del_adapter(&adap_info->pch_data[j].pch_adapter);
pci_iounmap(pdev, base_addr);
err_pci_iomap:
pci_release_regions(pdev);
@@ -793,17 +819,22 @@ err_pci_enable:
static void __devexit pch_i2c_remove(struct pci_dev *pdev)
{
+ int i;
struct adapter_info *adap_info = pci_get_drvdata(pdev);
- pch_i2c_disbl_int(&adap_info->pch_data);
- free_irq(pdev->irq, &adap_info->pch_data);
- i2c_del_adapter(&(adap_info->pch_data.pch_adapter));
+ free_irq(pdev->irq, adap_info);
- if (adap_info->pch_data.pch_base_address) {
- pci_iounmap(pdev, adap_info->pch_data.pch_base_address);
- adap_info->pch_data.pch_base_address = 0;
+ for (i = 0; i < adap_info->ch_num; i++) {
+ pch_i2c_disbl_int(&adap_info->pch_data[i]);
+ i2c_del_adapter(&adap_info->pch_data[i].pch_adapter);
}
+ if (adap_info->pch_data[0].pch_base_address)
+ pci_iounmap(pdev, adap_info->pch_data[0].pch_base_address);
+
+ for (i = 0; i < adap_info->ch_num; i++)
+ adap_info->pch_data[i].pch_base_address = 0;
+
pci_set_drvdata(pdev, NULL);
pci_release_regions(pdev);
@@ -816,17 +847,22 @@ static void __devexit pch_i2c_remove(struct pci_dev *pdev)
static int pch_i2c_suspend(struct pci_dev *pdev, pm_message_t state)
{
int ret;
+ int i;
struct adapter_info *adap_info = pci_get_drvdata(pdev);
- void __iomem *p = adap_info->pch_data.pch_base_address;
+ void __iomem *p = adap_info->pch_data[0].pch_base_address;
adap_info->pch_i2c_suspended = true;
- while ((adap_info->pch_data.pch_i2c_xfer_in_progress)) {
- /* Wait until all channel transfers are completed */
- msleep(20);
+ for (i = 0; i < adap_info->ch_num; i++) {
+ while ((adap_info->pch_data[i].pch_i2c_xfer_in_progress)) {
+ /* Wait until all channel transfers are completed */
+ msleep(20);
+ }
}
+
/* Disable the i2c interrupts */
- pch_i2c_disbl_int(&adap_info->pch_data);
+ for (i = 0; i < adap_info->ch_num; i++)
+ pch_i2c_disbl_int(&adap_info->pch_data[i]);
pch_pci_dbg(pdev, "I2CSR = %x I2CBUFSTA = %x I2CESRSTA = %x "
"invoked function pch_i2c_disbl_int successfully\n",
@@ -849,6 +885,7 @@ static int pch_i2c_suspend(struct pci_dev *pdev, pm_message_t state)
static int pch_i2c_resume(struct pci_dev *pdev)
{
+ int i;
struct adapter_info *adap_info = pci_get_drvdata(pdev);
pci_set_power_state(pdev, PCI_D0);
@@ -861,7 +898,8 @@ static int pch_i2c_resume(struct pci_dev *pdev)
pci_enable_wake(pdev, PCI_D3hot, 0);
- pch_i2c_init(&adap_info->pch_data);
+ for (i = 0; i < adap_info->ch_num; i++)
+ pch_i2c_init(&adap_info->pch_data[i]);
adap_info->pch_i2c_suspended = false;
@@ -893,7 +931,7 @@ static void __exit pch_pci_exit(void)
}
module_exit(pch_pci_exit);
-MODULE_DESCRIPTION("PCH I2C PCI Driver");
+MODULE_DESCRIPTION("Intel EG20T PCH/OKI SEMICONDUCTOR ML7213 IOH I2C Driver");
MODULE_LICENSE("GPL");
MODULE_AUTHOR("Tomoya MORINAGA. <tomoya-linux@dsn.okisemi.com>");
module_param(pch_i2c_speed, int, (S_IRUSR | S_IWUSR));
diff --git a/drivers/i2c/busses/i2c-i801.c b/drivers/i2c/busses/i2c-i801.c
index 7979aef7ee7..ed2e0c5ea37 100644
--- a/drivers/i2c/busses/i2c-i801.c
+++ b/drivers/i2c/busses/i2c-i801.c
@@ -44,11 +44,12 @@
ICH10 0x3a30 32 hard yes yes yes
ICH10 0x3a60 32 hard yes yes yes
5/3400 Series (PCH) 0x3b30 32 hard yes yes yes
- Cougar Point (PCH) 0x1c22 32 hard yes yes yes
+ 6 Series (PCH) 0x1c22 32 hard yes yes yes
Patsburg (PCH) 0x1d22 32 hard yes yes yes
Patsburg (PCH) IDF 0x1d70 32 hard yes yes yes
Patsburg (PCH) IDF 0x1d71 32 hard yes yes yes
Patsburg (PCH) IDF 0x1d72 32 hard yes yes yes
+ DH89xxCC (PCH) 0x2330 32 hard yes yes yes
Features supported by this driver:
Software PEC no
@@ -621,6 +622,7 @@ static const struct pci_device_id i801_ids[] = {
{ PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_PATSBURG_SMBUS_IDF0) },
{ PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_PATSBURG_SMBUS_IDF1) },
{ PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_PATSBURG_SMBUS_IDF2) },
+ { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_DH89XXCC_SMBUS) },
{ 0, }
};
diff --git a/drivers/i2c/busses/i2c-ibm_iic.c b/drivers/i2c/busses/i2c-ibm_iic.c
index 6e3c3824033..e4f88dca99b 100644
--- a/drivers/i2c/busses/i2c-ibm_iic.c
+++ b/drivers/i2c/busses/i2c-ibm_iic.c
@@ -691,8 +691,7 @@ static int __devinit iic_request_irq(struct platform_device *ofdev,
/*
* Register single IIC interface
*/
-static int __devinit iic_probe(struct platform_device *ofdev,
- const struct of_device_id *match)
+static int __devinit iic_probe(struct platform_device *ofdev)
{
struct device_node *np = ofdev->dev.of_node;
struct ibm_iic_private *dev;
@@ -806,7 +805,7 @@ static const struct of_device_id ibm_iic_match[] = {
{}
};
-static struct of_platform_driver ibm_iic_driver = {
+static struct platform_driver ibm_iic_driver = {
.driver = {
.name = "ibm-iic",
.owner = THIS_MODULE,
@@ -818,12 +817,12 @@ static struct of_platform_driver ibm_iic_driver = {
static int __init iic_init(void)
{
- return of_register_platform_driver(&ibm_iic_driver);
+ return platform_driver_register(&ibm_iic_driver);
}
static void __exit iic_exit(void)
{
- of_unregister_platform_driver(&ibm_iic_driver);
+ platform_driver_unregister(&ibm_iic_driver);
}
module_init(iic_init);
diff --git a/drivers/i2c/busses/i2c-mpc.c b/drivers/i2c/busses/i2c-mpc.c
index b74e6dc6886..75b984c519a 100644
--- a/drivers/i2c/busses/i2c-mpc.c
+++ b/drivers/i2c/busses/i2c-mpc.c
@@ -560,8 +560,7 @@ static struct i2c_adapter mpc_ops = {
.timeout = HZ,
};
-static int __devinit fsl_i2c_probe(struct platform_device *op,
- const struct of_device_id *match)
+static int __devinit fsl_i2c_probe(struct platform_device *op)
{
struct mpc_i2c *i2c;
const u32 *prop;
@@ -569,6 +568,9 @@ static int __devinit fsl_i2c_probe(struct platform_device *op,
int result = 0;
int plen;
+ if (!op->dev.of_match)
+ return -EINVAL;
+
i2c = kzalloc(sizeof(*i2c), GFP_KERNEL);
if (!i2c)
return -ENOMEM;
@@ -603,8 +605,8 @@ static int __devinit fsl_i2c_probe(struct platform_device *op,
clock = *prop;
}
- if (match->data) {
- struct mpc_i2c_data *data = match->data;
+ if (op->dev.of_match->data) {
+ struct mpc_i2c_data *data = op->dev.of_match->data;
data->setup(op->dev.of_node, i2c, clock, data->prescaler);
} else {
/* Backwards compatibility */
@@ -700,7 +702,7 @@ static const struct of_device_id mpc_i2c_of_match[] = {
MODULE_DEVICE_TABLE(of, mpc_i2c_of_match);
/* Structure for a device driver */
-static struct of_platform_driver mpc_i2c_driver = {
+static struct platform_driver mpc_i2c_driver = {
.probe = fsl_i2c_probe,
.remove = __devexit_p(fsl_i2c_remove),
.driver = {
@@ -712,18 +714,12 @@ static struct of_platform_driver mpc_i2c_driver = {
static int __init fsl_i2c_init(void)
{
- int rv;
-
- rv = of_register_platform_driver(&mpc_i2c_driver);
- if (rv)
- printk(KERN_ERR DRV_NAME
- " of_register_platform_driver failed (%i)\n", rv);
- return rv;
+ return platform_driver_register(&mpc_i2c_driver);
}
static void __exit fsl_i2c_exit(void)
{
- of_unregister_platform_driver(&mpc_i2c_driver);
+ platform_driver_unregister(&mpc_i2c_driver);
}
module_init(fsl_i2c_init);
diff --git a/drivers/i2c/busses/i2c-mxs.c b/drivers/i2c/busses/i2c-mxs.c
new file mode 100644
index 00000000000..caf96dc8ca1
--- /dev/null
+++ b/drivers/i2c/busses/i2c-mxs.c
@@ -0,0 +1,412 @@
+/*
+ * Freescale MXS I2C bus driver
+ *
+ * Copyright (C) 2011 Wolfram Sang, Pengutronix e.K.
+ *
+ * based on a (non-working) driver which was:
+ *
+ * Copyright (C) 2009-2010 Freescale Semiconductor, Inc. All Rights Reserved.
+ *
+ * TODO: add dma-support if platform-support for it is available
+ *
+ * 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.
+ *
+ */
+
+#include <linux/slab.h>
+#include <linux/device.h>
+#include <linux/module.h>
+#include <linux/i2c.h>
+#include <linux/err.h>
+#include <linux/interrupt.h>
+#include <linux/completion.h>
+#include <linux/platform_device.h>
+#include <linux/jiffies.h>
+#include <linux/io.h>
+
+#include <mach/common.h>
+
+#define DRIVER_NAME "mxs-i2c"
+
+#define MXS_I2C_CTRL0 (0x00)
+#define MXS_I2C_CTRL0_SET (0x04)
+
+#define MXS_I2C_CTRL0_SFTRST 0x80000000
+#define MXS_I2C_CTRL0_SEND_NAK_ON_LAST 0x02000000
+#define MXS_I2C_CTRL0_RETAIN_CLOCK 0x00200000
+#define MXS_I2C_CTRL0_POST_SEND_STOP 0x00100000
+#define MXS_I2C_CTRL0_PRE_SEND_START 0x00080000
+#define MXS_I2C_CTRL0_MASTER_MODE 0x00020000
+#define MXS_I2C_CTRL0_DIRECTION 0x00010000
+#define MXS_I2C_CTRL0_XFER_COUNT(v) ((v) & 0x0000FFFF)
+
+#define MXS_I2C_CTRL1 (0x40)
+#define MXS_I2C_CTRL1_SET (0x44)
+#define MXS_I2C_CTRL1_CLR (0x48)
+
+#define MXS_I2C_CTRL1_BUS_FREE_IRQ 0x80
+#define MXS_I2C_CTRL1_DATA_ENGINE_CMPLT_IRQ 0x40
+#define MXS_I2C_CTRL1_NO_SLAVE_ACK_IRQ 0x20
+#define MXS_I2C_CTRL1_OVERSIZE_XFER_TERM_IRQ 0x10
+#define MXS_I2C_CTRL1_EARLY_TERM_IRQ 0x08
+#define MXS_I2C_CTRL1_MASTER_LOSS_IRQ 0x04
+#define MXS_I2C_CTRL1_SLAVE_STOP_IRQ 0x02
+#define MXS_I2C_CTRL1_SLAVE_IRQ 0x01
+
+#define MXS_I2C_IRQ_MASK (MXS_I2C_CTRL1_DATA_ENGINE_CMPLT_IRQ | \
+ MXS_I2C_CTRL1_NO_SLAVE_ACK_IRQ | \
+ MXS_I2C_CTRL1_EARLY_TERM_IRQ | \
+ MXS_I2C_CTRL1_MASTER_LOSS_IRQ | \
+ MXS_I2C_CTRL1_SLAVE_STOP_IRQ | \
+ MXS_I2C_CTRL1_SLAVE_IRQ)
+
+#define MXS_I2C_QUEUECTRL (0x60)
+#define MXS_I2C_QUEUECTRL_SET (0x64)
+#define MXS_I2C_QUEUECTRL_CLR (0x68)
+
+#define MXS_I2C_QUEUECTRL_QUEUE_RUN 0x20
+#define MXS_I2C_QUEUECTRL_PIO_QUEUE_MODE 0x04
+
+#define MXS_I2C_QUEUESTAT (0x70)
+#define MXS_I2C_QUEUESTAT_RD_QUEUE_EMPTY 0x00002000
+
+#define MXS_I2C_QUEUECMD (0x80)
+
+#define MXS_I2C_QUEUEDATA (0x90)
+
+#define MXS_I2C_DATA (0xa0)
+
+
+#define MXS_CMD_I2C_SELECT (MXS_I2C_CTRL0_RETAIN_CLOCK | \
+ MXS_I2C_CTRL0_PRE_SEND_START | \
+ MXS_I2C_CTRL0_MASTER_MODE | \
+ MXS_I2C_CTRL0_DIRECTION | \
+ MXS_I2C_CTRL0_XFER_COUNT(1))
+
+#define MXS_CMD_I2C_WRITE (MXS_I2C_CTRL0_PRE_SEND_START | \
+ MXS_I2C_CTRL0_MASTER_MODE | \
+ MXS_I2C_CTRL0_DIRECTION)
+
+#define MXS_CMD_I2C_READ (MXS_I2C_CTRL0_SEND_NAK_ON_LAST | \
+ MXS_I2C_CTRL0_MASTER_MODE)
+
+/**
+ * struct mxs_i2c_dev - per device, private MXS-I2C data
+ *
+ * @dev: driver model device node
+ * @regs: IO registers pointer
+ * @cmd_complete: completion object for transaction wait
+ * @cmd_err: error code for last transaction
+ * @adapter: i2c subsystem adapter node
+ */
+struct mxs_i2c_dev {
+ struct device *dev;
+ void __iomem *regs;
+ struct completion cmd_complete;
+ u32 cmd_err;
+ struct i2c_adapter adapter;
+};
+
+/*
+ * TODO: check if calls to here are really needed. If not, we could get rid of
+ * mxs_reset_block and the mach-dependency. Needs an I2C analyzer, probably.
+ */
+static void mxs_i2c_reset(struct mxs_i2c_dev *i2c)
+{
+ mxs_reset_block(i2c->regs);
+ writel(MXS_I2C_IRQ_MASK << 8, i2c->regs + MXS_I2C_CTRL1_SET);
+ writel(MXS_I2C_QUEUECTRL_PIO_QUEUE_MODE,
+ i2c->regs + MXS_I2C_QUEUECTRL_SET);
+}
+
+static void mxs_i2c_pioq_setup_read(struct mxs_i2c_dev *i2c, u8 addr, int len,
+ int flags)
+{
+ u32 data;
+
+ writel(MXS_CMD_I2C_SELECT, i2c->regs + MXS_I2C_QUEUECMD);
+
+ data = (addr << 1) | I2C_SMBUS_READ;
+ writel(data, i2c->regs + MXS_I2C_DATA);
+
+ data = MXS_CMD_I2C_READ | MXS_I2C_CTRL0_XFER_COUNT(len) | flags;
+ writel(data, i2c->regs + MXS_I2C_QUEUECMD);
+}
+
+static void mxs_i2c_pioq_setup_write(struct mxs_i2c_dev *i2c,
+ u8 addr, u8 *buf, int len, int flags)
+{
+ u32 data;
+ int i, shifts_left;
+
+ data = MXS_CMD_I2C_WRITE | MXS_I2C_CTRL0_XFER_COUNT(len + 1) | flags;
+ writel(data, i2c->regs + MXS_I2C_QUEUECMD);
+
+ /*
+ * We have to copy the slave address (u8) and buffer (arbitrary number
+ * of u8) into the data register (u32). To achieve that, the u8 are put
+ * into the MSBs of 'data' which is then shifted for the next u8. When
+ * apropriate, 'data' is written to MXS_I2C_DATA. So, the first u32
+ * looks like this:
+ *
+ * 3 2 1 0
+ * 10987654|32109876|54321098|76543210
+ * --------+--------+--------+--------
+ * buffer+2|buffer+1|buffer+0|slave_addr
+ */
+
+ data = ((addr << 1) | I2C_SMBUS_WRITE) << 24;
+
+ for (i = 0; i < len; i++) {
+ data >>= 8;
+ data |= buf[i] << 24;
+ if ((i & 3) == 2)
+ writel(data, i2c->regs + MXS_I2C_DATA);
+ }
+
+ /* Write out the remaining bytes if any */
+ shifts_left = 24 - (i & 3) * 8;
+ if (shifts_left)
+ writel(data >> shifts_left, i2c->regs + MXS_I2C_DATA);
+}
+
+/*
+ * TODO: should be replaceable with a waitqueue and RD_QUEUE_IRQ (setting the
+ * rd_threshold to 1). Couldn't get this to work, though.
+ */
+static int mxs_i2c_wait_for_data(struct mxs_i2c_dev *i2c)
+{
+ unsigned long timeout = jiffies + msecs_to_jiffies(1000);
+
+ while (readl(i2c->regs + MXS_I2C_QUEUESTAT)
+ & MXS_I2C_QUEUESTAT_RD_QUEUE_EMPTY) {
+ if (time_after(jiffies, timeout))
+ return -ETIMEDOUT;
+ cond_resched();
+ }
+
+ return 0;
+}
+
+static int mxs_i2c_finish_read(struct mxs_i2c_dev *i2c, u8 *buf, int len)
+{
+ u32 data;
+ int i;
+
+ for (i = 0; i < len; i++) {
+ if ((i & 3) == 0) {
+ if (mxs_i2c_wait_for_data(i2c))
+ return -ETIMEDOUT;
+ data = readl(i2c->regs + MXS_I2C_QUEUEDATA);
+ }
+ buf[i] = data & 0xff;
+ data >>= 8;
+ }
+
+ return 0;
+}
+
+/*
+ * Low level master read/write transaction.
+ */
+static int mxs_i2c_xfer_msg(struct i2c_adapter *adap, struct i2c_msg *msg,
+ int stop)
+{
+ struct mxs_i2c_dev *i2c = i2c_get_adapdata(adap);
+ int ret;
+ int flags;
+
+ init_completion(&i2c->cmd_complete);
+
+ dev_dbg(i2c->dev, "addr: 0x%04x, len: %d, flags: 0x%x, stop: %d\n",
+ msg->addr, msg->len, msg->flags, stop);
+
+ if (msg->len == 0)
+ return -EINVAL;
+
+ flags = stop ? MXS_I2C_CTRL0_POST_SEND_STOP : 0;
+
+ if (msg->flags & I2C_M_RD)
+ mxs_i2c_pioq_setup_read(i2c, msg->addr, msg->len, flags);
+ else
+ mxs_i2c_pioq_setup_write(i2c, msg->addr, msg->buf, msg->len,
+ flags);
+
+ writel(MXS_I2C_QUEUECTRL_QUEUE_RUN,
+ i2c->regs + MXS_I2C_QUEUECTRL_SET);
+
+ ret = wait_for_completion_timeout(&i2c->cmd_complete,
+ msecs_to_jiffies(1000));
+ if (ret == 0)
+ goto timeout;
+
+ if ((!i2c->cmd_err) && (msg->flags & I2C_M_RD)) {
+ ret = mxs_i2c_finish_read(i2c, msg->buf, msg->len);
+ if (ret)
+ goto timeout;
+ }
+
+ if (i2c->cmd_err == -ENXIO)
+ mxs_i2c_reset(i2c);
+
+ dev_dbg(i2c->dev, "Done with err=%d\n", i2c->cmd_err);
+
+ return i2c->cmd_err;
+
+timeout:
+ dev_dbg(i2c->dev, "Timeout!\n");
+ mxs_i2c_reset(i2c);
+ return -ETIMEDOUT;
+}
+
+static int mxs_i2c_xfer(struct i2c_adapter *adap, struct i2c_msg msgs[],
+ int num)
+{
+ int i;
+ int err;
+
+ for (i = 0; i < num; i++) {
+ err = mxs_i2c_xfer_msg(adap, &msgs[i], i == (num - 1));
+ if (err)
+ return err;
+ }
+
+ return num;
+}
+
+static u32 mxs_i2c_func(struct i2c_adapter *adap)
+{
+ return I2C_FUNC_I2C | (I2C_FUNC_SMBUS_EMUL & ~I2C_FUNC_SMBUS_QUICK);
+}
+
+static irqreturn_t mxs_i2c_isr(int this_irq, void *dev_id)
+{
+ struct mxs_i2c_dev *i2c = dev_id;
+ u32 stat = readl(i2c->regs + MXS_I2C_CTRL1) & MXS_I2C_IRQ_MASK;
+
+ if (!stat)
+ return IRQ_NONE;
+
+ if (stat & MXS_I2C_CTRL1_NO_SLAVE_ACK_IRQ)
+ i2c->cmd_err = -ENXIO;
+ else if (stat & (MXS_I2C_CTRL1_EARLY_TERM_IRQ |
+ MXS_I2C_CTRL1_MASTER_LOSS_IRQ |
+ MXS_I2C_CTRL1_SLAVE_STOP_IRQ | MXS_I2C_CTRL1_SLAVE_IRQ))
+ /* MXS_I2C_CTRL1_OVERSIZE_XFER_TERM_IRQ is only for slaves */
+ i2c->cmd_err = -EIO;
+ else
+ i2c->cmd_err = 0;
+
+ complete(&i2c->cmd_complete);
+
+ writel(stat, i2c->regs + MXS_I2C_CTRL1_CLR);
+ return IRQ_HANDLED;
+}
+
+static const struct i2c_algorithm mxs_i2c_algo = {
+ .master_xfer = mxs_i2c_xfer,
+ .functionality = mxs_i2c_func,
+};
+
+static int __devinit mxs_i2c_probe(struct platform_device *pdev)
+{
+ struct device *dev = &pdev->dev;
+ struct mxs_i2c_dev *i2c;
+ struct i2c_adapter *adap;
+ struct resource *res;
+ resource_size_t res_size;
+ int err, irq;
+
+ i2c = devm_kzalloc(dev, sizeof(struct mxs_i2c_dev), GFP_KERNEL);
+ if (!i2c)
+ return -ENOMEM;
+
+ res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ if (!res)
+ return -ENOENT;
+
+ res_size = resource_size(res);
+ if (!devm_request_mem_region(dev, res->start, res_size, res->name))
+ return -EBUSY;
+
+ i2c->regs = devm_ioremap_nocache(dev, res->start, res_size);
+ if (!i2c->regs)
+ return -EBUSY;
+
+ irq = platform_get_irq(pdev, 0);
+ if (irq < 0)
+ return irq;
+
+ err = devm_request_irq(dev, irq, mxs_i2c_isr, 0, dev_name(dev), i2c);
+ if (err)
+ return err;
+
+ i2c->dev = dev;
+ platform_set_drvdata(pdev, i2c);
+
+ /* Do reset to enforce correct startup after pinmuxing */
+ mxs_i2c_reset(i2c);
+
+ adap = &i2c->adapter;
+ strlcpy(adap->name, "MXS I2C adapter", sizeof(adap->name));
+ adap->owner = THIS_MODULE;
+ adap->algo = &mxs_i2c_algo;
+ adap->dev.parent = dev;
+ adap->nr = pdev->id;
+ i2c_set_adapdata(adap, i2c);
+ err = i2c_add_numbered_adapter(adap);
+ if (err) {
+ dev_err(dev, "Failed to add adapter (%d)\n", err);
+ writel(MXS_I2C_CTRL0_SFTRST,
+ i2c->regs + MXS_I2C_CTRL0_SET);
+ return err;
+ }
+
+ return 0;
+}
+
+static int __devexit mxs_i2c_remove(struct platform_device *pdev)
+{
+ struct mxs_i2c_dev *i2c = platform_get_drvdata(pdev);
+ int ret;
+
+ ret = i2c_del_adapter(&i2c->adapter);
+ if (ret)
+ return -EBUSY;
+
+ writel(MXS_I2C_QUEUECTRL_QUEUE_RUN,
+ i2c->regs + MXS_I2C_QUEUECTRL_CLR);
+ writel(MXS_I2C_CTRL0_SFTRST, i2c->regs + MXS_I2C_CTRL0_SET);
+
+ platform_set_drvdata(pdev, NULL);
+
+ return 0;
+}
+
+static struct platform_driver mxs_i2c_driver = {
+ .driver = {
+ .name = DRIVER_NAME,
+ .owner = THIS_MODULE,
+ },
+ .remove = __devexit_p(mxs_i2c_remove),
+};
+
+static int __init mxs_i2c_init(void)
+{
+ return platform_driver_probe(&mxs_i2c_driver, mxs_i2c_probe);
+}
+subsys_initcall(mxs_i2c_init);
+
+static void __exit mxs_i2c_exit(void)
+{
+ platform_driver_unregister(&mxs_i2c_driver);
+}
+module_exit(mxs_i2c_exit);
+
+MODULE_AUTHOR("Wolfram Sang <w.sang@pengutronix.de>");
+MODULE_DESCRIPTION("MXS I2C Bus Driver");
+MODULE_LICENSE("GPL");
+MODULE_ALIAS("platform:" DRIVER_NAME);
diff --git a/drivers/i2c/busses/i2c-ocores.c b/drivers/i2c/busses/i2c-ocores.c
index ef3bcb1ce86..fee1a261386 100644
--- a/drivers/i2c/busses/i2c-ocores.c
+++ b/drivers/i2c/busses/i2c-ocores.c
@@ -49,6 +49,7 @@
#include <linux/init.h>
#include <linux/errno.h>
#include <linux/platform_device.h>
+#include <linux/mfd/core.h>
#include <linux/i2c.h>
#include <linux/interrupt.h>
#include <linux/wait.h>
@@ -249,7 +250,7 @@ static struct i2c_adapter ocores_adapter = {
static int ocores_i2c_of_probe(struct platform_device* pdev,
struct ocores_i2c* i2c)
{
- __be32* val;
+ const __be32* val;
val = of_get_property(pdev->dev.of_node, "regstep", NULL);
if (!val) {
@@ -305,7 +306,7 @@ static int __devinit ocores_i2c_probe(struct platform_device *pdev)
return -EIO;
}
- pdata = pdev->dev.platform_data;
+ pdata = mfd_get_data(pdev);
if (pdata) {
i2c->regstep = pdata->regstep;
i2c->clock_khz = pdata->clock_khz;
@@ -330,9 +331,7 @@ static int __devinit ocores_i2c_probe(struct platform_device *pdev)
i2c->adap = ocores_adapter;
i2c_set_adapdata(&i2c->adap, i2c);
i2c->adap.dev.parent = &pdev->dev;
-#ifdef CONFIG_OF
i2c->adap.dev.of_node = pdev->dev.of_node;
-#endif
/* add i2c adapter to i2c tree */
ret = i2c_add_adapter(&i2c->adap);
@@ -390,15 +389,11 @@ static int ocores_i2c_resume(struct platform_device *pdev)
#define ocores_i2c_resume NULL
#endif
-#ifdef CONFIG_OF
static struct of_device_id ocores_i2c_match[] = {
- {
- .compatible = "opencores,i2c-ocores",
- },
- {},
+ { .compatible = "opencores,i2c-ocores", },
+ {},
};
MODULE_DEVICE_TABLE(of, ocores_i2c_match);
-#endif
/* work with hotplug and coldplug */
MODULE_ALIAS("platform:ocores-i2c");
@@ -411,9 +406,7 @@ static struct platform_driver ocores_i2c_driver = {
.driver = {
.owner = THIS_MODULE,
.name = "ocores-i2c",
-#ifdef CONFIG_OF
- .of_match_table = ocores_i2c_match,
-#endif
+ .of_match_table = ocores_i2c_match,
},
};
diff --git a/drivers/i2c/busses/i2c-omap.c b/drivers/i2c/busses/i2c-omap.c
index b605ff3a1fa..58a58c7eaa1 100644
--- a/drivers/i2c/busses/i2c-omap.c
+++ b/drivers/i2c/busses/i2c-omap.c
@@ -378,9 +378,7 @@ static int omap_i2c_init(struct omap_i2c_dev *dev)
* REVISIT: Some wkup sources might not be needed.
*/
dev->westate = OMAP_I2C_WE_ALL;
- if (dev->rev < OMAP_I2C_REV_ON_4430)
- omap_i2c_write_reg(dev, OMAP_I2C_WE_REG,
- dev->westate);
+ omap_i2c_write_reg(dev, OMAP_I2C_WE_REG, dev->westate);
}
}
omap_i2c_write_reg(dev, OMAP_I2C_CON_REG, 0);
@@ -847,11 +845,15 @@ complete:
dev_err(dev->dev, "Arbitration lost\n");
err |= OMAP_I2C_STAT_AL;
}
+ /*
+ * ProDB0017052: Clear ARDY bit twice
+ */
if (stat & (OMAP_I2C_STAT_ARDY | OMAP_I2C_STAT_NACK |
OMAP_I2C_STAT_AL)) {
omap_i2c_ack_stat(dev, stat &
(OMAP_I2C_STAT_RRDY | OMAP_I2C_STAT_RDR |
- OMAP_I2C_STAT_XRDY | OMAP_I2C_STAT_XDR));
+ OMAP_I2C_STAT_XRDY | OMAP_I2C_STAT_XDR |
+ OMAP_I2C_STAT_ARDY));
omap_i2c_complete_cmd(dev, err);
return IRQ_HANDLED;
}
@@ -1137,12 +1139,41 @@ omap_i2c_remove(struct platform_device *pdev)
return 0;
}
+#ifdef CONFIG_SUSPEND
+static int omap_i2c_suspend(struct device *dev)
+{
+ if (!pm_runtime_suspended(dev))
+ if (dev->bus && dev->bus->pm && dev->bus->pm->runtime_suspend)
+ dev->bus->pm->runtime_suspend(dev);
+
+ return 0;
+}
+
+static int omap_i2c_resume(struct device *dev)
+{
+ if (!pm_runtime_suspended(dev))
+ if (dev->bus && dev->bus->pm && dev->bus->pm->runtime_resume)
+ dev->bus->pm->runtime_resume(dev);
+
+ return 0;
+}
+
+static struct dev_pm_ops omap_i2c_pm_ops = {
+ .suspend = omap_i2c_suspend,
+ .resume = omap_i2c_resume,
+};
+#define OMAP_I2C_PM_OPS (&omap_i2c_pm_ops)
+#else
+#define OMAP_I2C_PM_OPS NULL
+#endif
+
static struct platform_driver omap_i2c_driver = {
.probe = omap_i2c_probe,
.remove = omap_i2c_remove,
.driver = {
.name = "omap_i2c",
.owner = THIS_MODULE,
+ .pm = OMAP_I2C_PM_OPS,
},
};
diff --git a/drivers/i2c/busses/i2c-puv3.c b/drivers/i2c/busses/i2c-puv3.c
new file mode 100644
index 00000000000..fac67394084
--- /dev/null
+++ b/drivers/i2c/busses/i2c-puv3.c
@@ -0,0 +1,306 @@
+/*
+ * I2C driver for PKUnity-v3 SoC
+ * Code specific to PKUnity SoC and UniCore ISA
+ *
+ * Maintained by GUAN Xue-tao <gxt@mprc.pku.edu.cn>
+ * Copyright (C) 2001-2010 Guan Xuetao
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/err.h>
+#include <linux/slab.h>
+#include <linux/types.h>
+#include <linux/delay.h>
+#include <linux/i2c.h>
+#include <linux/init.h>
+#include <linux/clk.h>
+#include <linux/platform_device.h>
+#include <linux/io.h>
+#include <mach/hardware.h>
+
+/*
+ * Poll the i2c status register until the specified bit is set.
+ * Returns 0 if timed out (100 msec).
+ */
+static short poll_status(unsigned long bit)
+{
+ int loop_cntr = 1000;
+
+ if (bit & I2C_STATUS_TFNF) {
+ do {
+ udelay(10);
+ } while (!(readl(I2C_STATUS) & bit) && (--loop_cntr > 0));
+ } else {
+ /* RXRDY handler */
+ do {
+ if (readl(I2C_TAR) == I2C_TAR_EEPROM)
+ msleep(20);
+ else
+ udelay(10);
+ } while (!(readl(I2C_RXFLR) & 0xf) && (--loop_cntr > 0));
+ }
+
+ return (loop_cntr > 0);
+}
+
+static int xfer_read(struct i2c_adapter *adap, unsigned char *buf, int length)
+{
+ int i2c_reg = *buf;
+
+ /* Read data */
+ while (length--) {
+ if (!poll_status(I2C_STATUS_TFNF)) {
+ dev_dbg(&adap->dev, "Tx FIFO Not Full timeout\n");
+ return -ETIMEDOUT;
+ }
+
+ /* send addr */
+ writel(i2c_reg | I2C_DATACMD_WRITE, I2C_DATACMD);
+
+ /* get ready to next write */
+ i2c_reg++;
+
+ /* send read CMD */
+ writel(I2C_DATACMD_READ, I2C_DATACMD);
+
+ /* wait until the Rx FIFO have available */
+ if (!poll_status(I2C_STATUS_RFNE)) {
+ dev_dbg(&adap->dev, "RXRDY timeout\n");
+ return -ETIMEDOUT;
+ }
+
+ /* read the data to buf */
+ *buf = (readl(I2C_DATACMD) & I2C_DATACMD_DAT_MASK);
+ buf++;
+ }
+
+ return 0;
+}
+
+static int xfer_write(struct i2c_adapter *adap, unsigned char *buf, int length)
+{
+ int i2c_reg = *buf;
+
+ /* Do nothing but storing the reg_num to a static variable */
+ if (i2c_reg == -1) {
+ printk(KERN_WARNING "Error i2c reg\n");
+ return -ETIMEDOUT;
+ }
+
+ if (length == 1)
+ return 0;
+
+ buf++;
+ length--;
+ while (length--) {
+ /* send addr */
+ writel(i2c_reg | I2C_DATACMD_WRITE, I2C_DATACMD);
+
+ /* send write CMD */
+ writel(*buf | I2C_DATACMD_WRITE, I2C_DATACMD);
+
+ /* wait until the Rx FIFO have available */
+ msleep(20);
+
+ /* read the data to buf */
+ i2c_reg++;
+ buf++;
+ }
+
+ return 0;
+}
+
+/*
+ * Generic i2c master transfer entrypoint.
+ *
+ */
+static int puv3_i2c_xfer(struct i2c_adapter *adap, struct i2c_msg *pmsg,
+ int num)
+{
+ int i, ret;
+ unsigned char swap;
+
+ /* Disable i2c */
+ writel(I2C_ENABLE_DISABLE, I2C_ENABLE);
+
+ /* Set the work mode and speed*/
+ writel(I2C_CON_MASTER | I2C_CON_SPEED_STD | I2C_CON_SLAVEDISABLE, I2C_CON);
+
+ writel(pmsg->addr, I2C_TAR);
+
+ /* Enable i2c */
+ writel(I2C_ENABLE_ENABLE, I2C_ENABLE);
+
+ dev_dbg(&adap->dev, "puv3_i2c_xfer: processing %d messages:\n", num);
+
+ for (i = 0; i < num; i++) {
+ dev_dbg(&adap->dev, " #%d: %sing %d byte%s %s 0x%02x\n", i,
+ pmsg->flags & I2C_M_RD ? "read" : "writ",
+ pmsg->len, pmsg->len > 1 ? "s" : "",
+ pmsg->flags & I2C_M_RD ? "from" : "to", pmsg->addr);
+
+ if (pmsg->len && pmsg->buf) { /* sanity check */
+ if (pmsg->flags & I2C_M_RD)
+ ret = xfer_read(adap, pmsg->buf, pmsg->len);
+ else
+ ret = xfer_write(adap, pmsg->buf, pmsg->len);
+
+ if (ret)
+ return ret;
+
+ }
+ dev_dbg(&adap->dev, "transfer complete\n");
+ pmsg++; /* next message */
+ }
+
+ /* XXX: fixup be16_to_cpu in bq27x00_battery.c */
+ if (pmsg->addr == I2C_TAR_PWIC) {
+ swap = pmsg->buf[0];
+ pmsg->buf[0] = pmsg->buf[1];
+ pmsg->buf[1] = swap;
+ }
+
+ return i;
+}
+
+/*
+ * Return list of supported functionality.
+ */
+static u32 puv3_i2c_func(struct i2c_adapter *adapter)
+{
+ return I2C_FUNC_I2C | I2C_FUNC_SMBUS_EMUL;
+}
+
+static struct i2c_algorithm puv3_i2c_algorithm = {
+ .master_xfer = puv3_i2c_xfer,
+ .functionality = puv3_i2c_func,
+};
+
+/*
+ * Main initialization routine.
+ */
+static int __devinit puv3_i2c_probe(struct platform_device *pdev)
+{
+ struct i2c_adapter *adapter;
+ struct resource *mem;
+ int rc;
+
+ mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ if (!mem)
+ return -ENODEV;
+
+ if (!request_mem_region(mem->start, resource_size(mem), "puv3_i2c"))
+ return -EBUSY;
+
+ adapter = kzalloc(sizeof(struct i2c_adapter), GFP_KERNEL);
+ if (adapter == NULL) {
+ dev_err(&pdev->dev, "can't allocate inteface!\n");
+ rc = -ENOMEM;
+ goto fail_nomem;
+ }
+ snprintf(adapter->name, sizeof(adapter->name), "PUV3-I2C at 0x%08x",
+ mem->start);
+ adapter->algo = &puv3_i2c_algorithm;
+ adapter->class = I2C_CLASS_HWMON;
+ adapter->dev.parent = &pdev->dev;
+
+ platform_set_drvdata(pdev, adapter);
+
+ adapter->nr = pdev->id;
+ rc = i2c_add_numbered_adapter(adapter);
+ if (rc) {
+ dev_err(&pdev->dev, "Adapter '%s' registration failed\n",
+ adapter->name);
+ goto fail_add_adapter;
+ }
+
+ dev_info(&pdev->dev, "PKUnity v3 i2c bus adapter.\n");
+ return 0;
+
+fail_add_adapter:
+ platform_set_drvdata(pdev, NULL);
+ kfree(adapter);
+fail_nomem:
+ release_mem_region(mem->start, resource_size(mem));
+
+ return rc;
+}
+
+static int __devexit puv3_i2c_remove(struct platform_device *pdev)
+{
+ struct i2c_adapter *adapter = platform_get_drvdata(pdev);
+ struct resource *mem;
+ int rc;
+
+ rc = i2c_del_adapter(adapter);
+ if (rc) {
+ dev_err(&pdev->dev, "Adapter '%s' delete fail\n",
+ adapter->name);
+ return rc;
+ }
+
+ put_device(&pdev->dev);
+ platform_set_drvdata(pdev, NULL);
+
+ mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ release_mem_region(mem->start, resource_size(mem));
+
+ return rc;
+}
+
+#ifdef CONFIG_PM
+static int puv3_i2c_suspend(struct platform_device *dev, pm_message_t state)
+{
+ int poll_count;
+ /* Disable the IIC */
+ writel(I2C_ENABLE_DISABLE, I2C_ENABLE);
+ for (poll_count = 0; poll_count < 50; poll_count++) {
+ if (readl(I2C_ENSTATUS) & I2C_ENSTATUS_ENABLE)
+ udelay(25);
+ }
+
+ return 0;
+}
+
+static int puv3_i2c_resume(struct platform_device *dev)
+{
+ return 0 ;
+}
+#else
+#define puv3_i2c_suspend NULL
+#define puv3_i2c_resume NULL
+#endif
+
+MODULE_ALIAS("platform:puv3_i2c");
+
+static struct platform_driver puv3_i2c_driver = {
+ .probe = puv3_i2c_probe,
+ .remove = __devexit_p(puv3_i2c_remove),
+ .suspend = puv3_i2c_suspend,
+ .resume = puv3_i2c_resume,
+ .driver = {
+ .name = "PKUnity-v3-I2C",
+ .owner = THIS_MODULE,
+ }
+};
+
+static int __init puv3_i2c_init(void)
+{
+ return platform_driver_register(&puv3_i2c_driver);
+}
+
+static void __exit puv3_i2c_exit(void)
+{
+ platform_driver_unregister(&puv3_i2c_driver);
+}
+
+module_init(puv3_i2c_init);
+module_exit(puv3_i2c_exit);
+
+MODULE_DESCRIPTION("PKUnity v3 I2C driver");
+MODULE_LICENSE("GPL v2");
diff --git a/drivers/i2c/busses/i2c-pxa-pci.c b/drivers/i2c/busses/i2c-pxa-pci.c
new file mode 100644
index 00000000000..6659d269b84
--- /dev/null
+++ b/drivers/i2c/busses/i2c-pxa-pci.c
@@ -0,0 +1,176 @@
+/*
+ * The CE4100's I2C device is more or less the same one as found on PXA.
+ * It does not support slave mode, the register slightly moved. This PCI
+ * device provides three bars, every contains a single I2C controller.
+ */
+#include <linux/pci.h>
+#include <linux/platform_device.h>
+#include <linux/i2c/pxa-i2c.h>
+#include <linux/of.h>
+#include <linux/of_device.h>
+#include <linux/of_address.h>
+
+#define CE4100_PCI_I2C_DEVS 3
+
+struct ce4100_devices {
+ struct platform_device *pdev[CE4100_PCI_I2C_DEVS];
+};
+
+static struct platform_device *add_i2c_device(struct pci_dev *dev, int bar)
+{
+ struct platform_device *pdev;
+ struct i2c_pxa_platform_data pdata;
+ struct resource res[2];
+ struct device_node *child;
+ static int devnum;
+ int ret;
+
+ memset(&pdata, 0, sizeof(struct i2c_pxa_platform_data));
+ memset(&res, 0, sizeof(res));
+
+ res[0].flags = IORESOURCE_MEM;
+ res[0].start = pci_resource_start(dev, bar);
+ res[0].end = pci_resource_end(dev, bar);
+
+ res[1].flags = IORESOURCE_IRQ;
+ res[1].start = dev->irq;
+ res[1].end = dev->irq;
+
+ for_each_child_of_node(dev->dev.of_node, child) {
+ const void *prop;
+ struct resource r;
+ int ret;
+
+ ret = of_address_to_resource(child, 0, &r);
+ if (ret < 0)
+ continue;
+ if (r.start != res[0].start)
+ continue;
+ if (r.end != res[0].end)
+ continue;
+ if (r.flags != res[0].flags)
+ continue;
+
+ prop = of_get_property(child, "fast-mode", NULL);
+ if (prop)
+ pdata.fast_mode = 1;
+
+ break;
+ }
+
+ if (!child) {
+ dev_err(&dev->dev, "failed to match a DT node for bar %d.\n",
+ bar);
+ ret = -EINVAL;
+ goto out;
+ }
+
+ pdev = platform_device_alloc("ce4100-i2c", devnum);
+ if (!pdev) {
+ of_node_put(child);
+ ret = -ENOMEM;
+ goto out;
+ }
+ pdev->dev.parent = &dev->dev;
+ pdev->dev.of_node = child;
+
+ ret = platform_device_add_resources(pdev, res, ARRAY_SIZE(res));
+ if (ret)
+ goto err;
+
+ ret = platform_device_add_data(pdev, &pdata, sizeof(pdata));
+ if (ret)
+ goto err;
+
+ ret = platform_device_add(pdev);
+ if (ret)
+ goto err;
+ devnum++;
+ return pdev;
+err:
+ platform_device_put(pdev);
+out:
+ return ERR_PTR(ret);
+}
+
+static int __devinit ce4100_i2c_probe(struct pci_dev *dev,
+ const struct pci_device_id *ent)
+{
+ int ret;
+ int i;
+ struct ce4100_devices *sds;
+
+ ret = pci_enable_device_mem(dev);
+ if (ret)
+ return ret;
+
+ if (!dev->dev.of_node) {
+ dev_err(&dev->dev, "Missing device tree node.\n");
+ return -EINVAL;
+ }
+ sds = kzalloc(sizeof(*sds), GFP_KERNEL);
+ if (!sds)
+ goto err_mem;
+
+ for (i = 0; i < ARRAY_SIZE(sds->pdev); i++) {
+ sds->pdev[i] = add_i2c_device(dev, i);
+ if (IS_ERR(sds->pdev[i])) {
+ while (--i >= 0)
+ platform_device_unregister(sds->pdev[i]);
+ goto err_dev_add;
+ }
+ }
+ pci_set_drvdata(dev, sds);
+ return 0;
+
+err_dev_add:
+ pci_set_drvdata(dev, NULL);
+ kfree(sds);
+err_mem:
+ pci_disable_device(dev);
+ return ret;
+}
+
+static void __devexit ce4100_i2c_remove(struct pci_dev *dev)
+{
+ struct ce4100_devices *sds;
+ unsigned int i;
+
+ sds = pci_get_drvdata(dev);
+ pci_set_drvdata(dev, NULL);
+
+ for (i = 0; i < ARRAY_SIZE(sds->pdev); i++)
+ platform_device_unregister(sds->pdev[i]);
+
+ pci_disable_device(dev);
+ kfree(sds);
+}
+
+static struct pci_device_id ce4100_i2c_devices[] __devinitdata = {
+ { PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0x2e68)},
+ { },
+};
+MODULE_DEVICE_TABLE(pci, ce4100_i2c_devices);
+
+static struct pci_driver ce4100_i2c_driver = {
+ .name = "ce4100_i2c",
+ .id_table = ce4100_i2c_devices,
+ .probe = ce4100_i2c_probe,
+ .remove = __devexit_p(ce4100_i2c_remove),
+};
+
+static int __init ce4100_i2c_init(void)
+{
+ return pci_register_driver(&ce4100_i2c_driver);
+}
+module_init(ce4100_i2c_init);
+
+static void __exit ce4100_i2c_exit(void)
+{
+ pci_unregister_driver(&ce4100_i2c_driver);
+}
+module_exit(ce4100_i2c_exit);
+
+MODULE_DESCRIPTION("CE4100 PCI-I2C glue code for PXA's driver");
+MODULE_LICENSE("GPL v2");
+MODULE_AUTHOR("Sebastian Andrzej Siewior <bigeasy@linutronix.de>");
diff --git a/drivers/i2c/busses/i2c-pxa.c b/drivers/i2c/busses/i2c-pxa.c
index f4c19a97e0b..f59224a5c76 100644
--- a/drivers/i2c/busses/i2c-pxa.c
+++ b/drivers/i2c/busses/i2c-pxa.c
@@ -29,38 +29,75 @@
#include <linux/errno.h>
#include <linux/interrupt.h>
#include <linux/i2c-pxa.h>
+#include <linux/of_i2c.h>
#include <linux/platform_device.h>
#include <linux/err.h>
#include <linux/clk.h>
#include <linux/slab.h>
#include <linux/io.h>
+#include <linux/i2c/pxa-i2c.h>
#include <asm/irq.h>
-#include <plat/i2c.h>
+
+#ifndef CONFIG_HAVE_CLK
+#define clk_get(dev, id) NULL
+#define clk_put(clk) do { } while (0)
+#define clk_disable(clk) do { } while (0)
+#define clk_enable(clk) do { } while (0)
+#endif
+
+struct pxa_reg_layout {
+ u32 ibmr;
+ u32 idbr;
+ u32 icr;
+ u32 isr;
+ u32 isar;
+};
+
+enum pxa_i2c_types {
+ REGS_PXA2XX,
+ REGS_PXA3XX,
+ REGS_CE4100,
+};
/*
- * I2C register offsets will be shifted 0 or 1 bit left, depending on
- * different SoCs
+ * I2C registers definitions
*/
-#define REG_SHIFT_0 (0 << 0)
-#define REG_SHIFT_1 (1 << 0)
-#define REG_SHIFT(d) ((d) & 0x1)
+static struct pxa_reg_layout pxa_reg_layout[] = {
+ [REGS_PXA2XX] = {
+ .ibmr = 0x00,
+ .idbr = 0x08,
+ .icr = 0x10,
+ .isr = 0x18,
+ .isar = 0x20,
+ },
+ [REGS_PXA3XX] = {
+ .ibmr = 0x00,
+ .idbr = 0x04,
+ .icr = 0x08,
+ .isr = 0x0c,
+ .isar = 0x10,
+ },
+ [REGS_CE4100] = {
+ .ibmr = 0x14,
+ .idbr = 0x0c,
+ .icr = 0x00,
+ .isr = 0x04,
+ /* no isar register */
+ },
+};
static const struct platform_device_id i2c_pxa_id_table[] = {
- { "pxa2xx-i2c", REG_SHIFT_1 },
- { "pxa3xx-pwri2c", REG_SHIFT_0 },
+ { "pxa2xx-i2c", REGS_PXA2XX },
+ { "pxa3xx-pwri2c", REGS_PXA3XX },
+ { "ce4100-i2c", REGS_CE4100 },
{ },
};
MODULE_DEVICE_TABLE(platform, i2c_pxa_id_table);
/*
- * I2C registers and bit definitions
+ * I2C bit definitions
*/
-#define IBMR (0x00)
-#define IDBR (0x08)
-#define ICR (0x10)
-#define ISR (0x18)
-#define ISAR (0x20)
#define ICR_START (1 << 0) /* start bit */
#define ICR_STOP (1 << 1) /* stop bit */
@@ -111,7 +148,11 @@ struct pxa_i2c {
u32 icrlog[32];
void __iomem *reg_base;
- unsigned int reg_shift;
+ void __iomem *reg_ibmr;
+ void __iomem *reg_idbr;
+ void __iomem *reg_icr;
+ void __iomem *reg_isr;
+ void __iomem *reg_isar;
unsigned long iobase;
unsigned long iosize;
@@ -121,11 +162,11 @@ struct pxa_i2c {
unsigned int fast_mode :1;
};
-#define _IBMR(i2c) ((i2c)->reg_base + (0x0 << (i2c)->reg_shift))
-#define _IDBR(i2c) ((i2c)->reg_base + (0x4 << (i2c)->reg_shift))
-#define _ICR(i2c) ((i2c)->reg_base + (0x8 << (i2c)->reg_shift))
-#define _ISR(i2c) ((i2c)->reg_base + (0xc << (i2c)->reg_shift))
-#define _ISAR(i2c) ((i2c)->reg_base + (0x10 << (i2c)->reg_shift))
+#define _IBMR(i2c) ((i2c)->reg_ibmr)
+#define _IDBR(i2c) ((i2c)->reg_idbr)
+#define _ICR(i2c) ((i2c)->reg_icr)
+#define _ISR(i2c) ((i2c)->reg_isr)
+#define _ISAR(i2c) ((i2c)->reg_isar)
/*
* I2C Slave mode address
@@ -418,7 +459,8 @@ static void i2c_pxa_reset(struct pxa_i2c *i2c)
writel(I2C_ISR_INIT, _ISR(i2c));
writel(readl(_ICR(i2c)) & ~ICR_UR, _ICR(i2c));
- writel(i2c->slave_addr, _ISAR(i2c));
+ if (i2c->reg_isar)
+ writel(i2c->slave_addr, _ISAR(i2c));
/* set control register values */
writel(I2C_ICR_INIT | (i2c->fast_mode ? ICR_FM : 0), _ICR(i2c));
@@ -729,8 +771,10 @@ static int i2c_pxa_do_xfer(struct pxa_i2c *i2c, struct i2c_msg *msg, int num)
*/
ret = i2c->msg_idx;
- if (timeout == 0)
+ if (!timeout && i2c->msg_num) {
i2c_pxa_scream_blue_murder(i2c, "timeout");
+ ret = I2C_RETRY;
+ }
out:
return ret;
@@ -915,11 +959,16 @@ static void i2c_pxa_irq_rxfull(struct pxa_i2c *i2c, u32 isr)
writel(icr, _ICR(i2c));
}
+#define VALID_INT_SOURCE (ISR_SSD | ISR_ALD | ISR_ITE | ISR_IRF | \
+ ISR_SAD | ISR_BED)
static irqreturn_t i2c_pxa_handler(int this_irq, void *dev_id)
{
struct pxa_i2c *i2c = dev_id;
u32 isr = readl(_ISR(i2c));
+ if (!(isr & VALID_INT_SOURCE))
+ return IRQ_NONE;
+
if (i2c_debug > 2 && 0) {
dev_dbg(&i2c->adap.dev, "%s: ISR=%08x, ICR=%08x, IBMR=%02x\n",
__func__, isr, readl(_ICR(i2c)), readl(_IBMR(i2c)));
@@ -934,7 +983,7 @@ static irqreturn_t i2c_pxa_handler(int this_irq, void *dev_id)
/*
* Always clear all pending IRQs.
*/
- writel(isr & (ISR_SSD|ISR_ALD|ISR_ITE|ISR_IRF|ISR_SAD|ISR_BED), _ISR(i2c));
+ writel(isr & VALID_INT_SOURCE, _ISR(i2c));
if (isr & ISR_SAD)
i2c_pxa_slave_start(i2c, isr);
@@ -1001,6 +1050,7 @@ static int i2c_pxa_probe(struct platform_device *dev)
struct resource *res;
struct i2c_pxa_platform_data *plat = dev->dev.platform_data;
const struct platform_device_id *id = platform_get_device_id(dev);
+ enum pxa_i2c_types i2c_type = id->driver_data;
int ret;
int irq;
@@ -1044,7 +1094,13 @@ static int i2c_pxa_probe(struct platform_device *dev)
ret = -EIO;
goto eremap;
}
- i2c->reg_shift = REG_SHIFT(id->driver_data);
+
+ i2c->reg_ibmr = i2c->reg_base + pxa_reg_layout[i2c_type].ibmr;
+ i2c->reg_idbr = i2c->reg_base + pxa_reg_layout[i2c_type].idbr;
+ i2c->reg_icr = i2c->reg_base + pxa_reg_layout[i2c_type].icr;
+ i2c->reg_isr = i2c->reg_base + pxa_reg_layout[i2c_type].isr;
+ if (i2c_type != REGS_CE4100)
+ i2c->reg_isar = i2c->reg_base + pxa_reg_layout[i2c_type].isar;
i2c->iobase = res->start;
i2c->iosize = resource_size(res);
@@ -1072,7 +1128,7 @@ static int i2c_pxa_probe(struct platform_device *dev)
i2c->adap.algo = &i2c_pxa_pio_algorithm;
} else {
i2c->adap.algo = &i2c_pxa_algorithm;
- ret = request_irq(irq, i2c_pxa_handler, IRQF_DISABLED,
+ ret = request_irq(irq, i2c_pxa_handler, IRQF_SHARED,
i2c->adap.name, i2c);
if (ret)
goto ereqirq;
@@ -1082,12 +1138,19 @@ static int i2c_pxa_probe(struct platform_device *dev)
i2c->adap.algo_data = i2c;
i2c->adap.dev.parent = &dev->dev;
+#ifdef CONFIG_OF
+ i2c->adap.dev.of_node = dev->dev.of_node;
+#endif
- ret = i2c_add_numbered_adapter(&i2c->adap);
+ if (i2c_type == REGS_CE4100)
+ ret = i2c_add_adapter(&i2c->adap);
+ else
+ ret = i2c_add_numbered_adapter(&i2c->adap);
if (ret < 0) {
printk(KERN_INFO "I2C: Failed to add bus\n");
goto eadapt;
}
+ of_i2c_register_devices(&i2c->adap);
platform_set_drvdata(dev, i2c);
diff --git a/drivers/i2c/busses/i2c-stu300.c b/drivers/i2c/busses/i2c-stu300.c
index 495be451d32..266135ddf7f 100644
--- a/drivers/i2c/busses/i2c-stu300.c
+++ b/drivers/i2c/busses/i2c-stu300.c
@@ -942,7 +942,7 @@ stu300_probe(struct platform_device *pdev)
adap->owner = THIS_MODULE;
/* DDC class but actually often used for more generic I2C */
adap->class = I2C_CLASS_DDC;
- strncpy(adap->name, "ST Microelectronics DDC I2C adapter",
+ strlcpy(adap->name, "ST Microelectronics DDC I2C adapter",
sizeof(adap->name));
adap->nr = bus_nr;
adap->algo = &stu300_algo;
diff --git a/drivers/i2c/busses/i2c-xiic.c b/drivers/i2c/busses/i2c-xiic.c
index a9c419e075a..9fbd7e6fe32 100644
--- a/drivers/i2c/busses/i2c-xiic.c
+++ b/drivers/i2c/busses/i2c-xiic.c
@@ -34,6 +34,7 @@
#include <linux/errno.h>
#include <linux/delay.h>
#include <linux/platform_device.h>
+#include <linux/mfd/core.h>
#include <linux/i2c.h>
#include <linux/interrupt.h>
#include <linux/wait.h>
@@ -704,7 +705,7 @@ static int __devinit xiic_i2c_probe(struct platform_device *pdev)
if (irq < 0)
goto resource_missing;
- pdata = (struct xiic_i2c_platform_data *) pdev->dev.platform_data;
+ pdata = mfd_get_data(pdev);
if (!pdata)
return -EINVAL;
diff --git a/drivers/i2c/i2c-boardinfo.c b/drivers/i2c/i2c-boardinfo.c
index 7e6a63b5716..3ca2e012e78 100644
--- a/drivers/i2c/i2c-boardinfo.c
+++ b/drivers/i2c/i2c-boardinfo.c
@@ -1,5 +1,5 @@
/*
- * i2c-boardinfo.h - collect pre-declarations of I2C devices
+ * i2c-boardinfo.c - collect pre-declarations of I2C devices
*
* 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
diff --git a/drivers/i2c/i2c-core.c b/drivers/i2c/i2c-core.c
index f0bd5bcdf56..e5f76a0372f 100644
--- a/drivers/i2c/i2c-core.c
+++ b/drivers/i2c/i2c-core.c
@@ -537,9 +537,7 @@ i2c_new_device(struct i2c_adapter *adap, struct i2c_board_info const *info)
client->dev.parent = &client->adapter->dev;
client->dev.bus = &i2c_bus_type;
client->dev.type = &i2c_client_type;
-#ifdef CONFIG_OF
client->dev.of_node = info->of_node;
-#endif
dev_set_name(&client->dev, "%d-%04x", i2c_adapter_id(adap),
client->addr);
@@ -799,6 +797,9 @@ static int i2c_do_add_adapter(struct i2c_driver *driver,
/* Let legacy drivers scan this bus for matching devices */
if (driver->attach_adapter) {
+ dev_warn(&adap->dev, "attach_adapter method is deprecated\n");
+ dev_warn(&adap->dev, "Please use another way to instantiate "
+ "your i2c_client\n");
/* We ignore the return code; if it fails, too bad */
driver->attach_adapter(adap);
}
@@ -983,6 +984,7 @@ static int i2c_do_del_adapter(struct i2c_driver *driver,
if (!driver->detach_adapter)
return 0;
+ dev_warn(&adapter->dev, "detach_adapter method is deprecated\n");
res = driver->detach_adapter(adapter);
if (res)
dev_err(&adapter->dev, "detach_adapter failed (%d) "
@@ -1093,6 +1095,18 @@ EXPORT_SYMBOL(i2c_del_adapter);
/* ------------------------------------------------------------------------- */
+int i2c_for_each_dev(void *data, int (*fn)(struct device *, void *))
+{
+ int res;
+
+ mutex_lock(&core_lock);
+ res = bus_for_each_dev(&i2c_bus_type, NULL, data, fn);
+ mutex_unlock(&core_lock);
+
+ return res;
+}
+EXPORT_SYMBOL_GPL(i2c_for_each_dev);
+
static int __process_new_driver(struct device *dev, void *data)
{
if (dev->type != &i2c_adapter_type)
@@ -1136,9 +1150,7 @@ int i2c_register_driver(struct module *owner, struct i2c_driver *driver)
INIT_LIST_HEAD(&driver->clients);
/* Walk the adapters that are already present */
- mutex_lock(&core_lock);
- bus_for_each_dev(&i2c_bus_type, NULL, driver, __process_new_driver);
- mutex_unlock(&core_lock);
+ i2c_for_each_dev(driver, __process_new_driver);
return 0;
}
@@ -1158,9 +1170,7 @@ static int __process_removed_driver(struct device *dev, void *data)
*/
void i2c_del_driver(struct i2c_driver *driver)
{
- mutex_lock(&core_lock);
- bus_for_each_dev(&i2c_bus_type, NULL, driver, __process_removed_driver);
- mutex_unlock(&core_lock);
+ i2c_for_each_dev(driver, __process_removed_driver);
driver_unregister(&driver->driver);
pr_debug("i2c-core: driver [%s] unregistered\n", driver->driver.name);
@@ -1583,12 +1593,12 @@ i2c_new_probed_device(struct i2c_adapter *adap,
}
EXPORT_SYMBOL_GPL(i2c_new_probed_device);
-struct i2c_adapter *i2c_get_adapter(int id)
+struct i2c_adapter *i2c_get_adapter(int nr)
{
struct i2c_adapter *adapter;
mutex_lock(&core_lock);
- adapter = idr_find(&i2c_adapter_idr, id);
+ adapter = idr_find(&i2c_adapter_idr, nr);
if (adapter && !try_module_get(adapter->owner))
adapter = NULL;
diff --git a/drivers/i2c/i2c-dev.c b/drivers/i2c/i2c-dev.c
index cec0f3ba97f..c90ce50b619 100644
--- a/drivers/i2c/i2c-dev.c
+++ b/drivers/i2c/i2c-dev.c
@@ -28,6 +28,8 @@
#include <linux/kernel.h>
#include <linux/module.h>
+#include <linux/device.h>
+#include <linux/notifier.h>
#include <linux/fs.h>
#include <linux/slab.h>
#include <linux/init.h>
@@ -37,16 +39,13 @@
#include <linux/jiffies.h>
#include <linux/uaccess.h>
-static struct i2c_driver i2cdev_driver;
-
/*
* An i2c_dev represents an i2c_adapter ... an I2C or SMBus master, not a
* slave (i2c_client) with which messages will be exchanged. It's coupled
* with a character special file which is accessed by user mode drivers.
*
* The list of i2c_dev structures is parallel to the i2c_adapter lists
- * maintained by the driver model, and is updated using notifications
- * delivered to the i2cdev_driver.
+ * maintained by the driver model, and is updated using bus notifications.
*/
struct i2c_dev {
struct list_head list;
@@ -491,7 +490,6 @@ static int i2cdev_open(struct inode *inode, struct file *file)
return -ENOMEM;
}
snprintf(client->name, I2C_NAME_SIZE, "i2c-dev %d", adap->nr);
- client->driver = &i2cdev_driver;
client->adapter = adap;
file->private_data = client;
@@ -522,19 +520,18 @@ static const struct file_operations i2cdev_fops = {
/* ------------------------------------------------------------------------- */
-/*
- * The legacy "i2cdev_driver" is used primarily to get notifications when
- * I2C adapters are added or removed, so that each one gets an i2c_dev
- * and is thus made available to userspace driver code.
- */
-
static struct class *i2c_dev_class;
-static int i2cdev_attach_adapter(struct i2c_adapter *adap)
+static int i2cdev_attach_adapter(struct device *dev, void *dummy)
{
+ struct i2c_adapter *adap;
struct i2c_dev *i2c_dev;
int res;
+ if (dev->type != &i2c_adapter_type)
+ return 0;
+ adap = to_i2c_adapter(dev);
+
i2c_dev = get_free_i2c_dev(adap);
if (IS_ERR(i2c_dev))
return PTR_ERR(i2c_dev);
@@ -561,10 +558,15 @@ error:
return res;
}
-static int i2cdev_detach_adapter(struct i2c_adapter *adap)
+static int i2cdev_detach_adapter(struct device *dev, void *dummy)
{
+ struct i2c_adapter *adap;
struct i2c_dev *i2c_dev;
+ if (dev->type != &i2c_adapter_type)
+ return 0;
+ adap = to_i2c_adapter(dev);
+
i2c_dev = i2c_dev_get_by_minor(adap->nr);
if (!i2c_dev) /* attach_adapter must have failed */
return 0;
@@ -577,12 +579,23 @@ static int i2cdev_detach_adapter(struct i2c_adapter *adap)
return 0;
}
-static struct i2c_driver i2cdev_driver = {
- .driver = {
- .name = "dev_driver",
- },
- .attach_adapter = i2cdev_attach_adapter,
- .detach_adapter = i2cdev_detach_adapter,
+int i2cdev_notifier_call(struct notifier_block *nb, unsigned long action,
+ void *data)
+{
+ struct device *dev = data;
+
+ switch (action) {
+ case BUS_NOTIFY_ADD_DEVICE:
+ return i2cdev_attach_adapter(dev, NULL);
+ case BUS_NOTIFY_DEL_DEVICE:
+ return i2cdev_detach_adapter(dev, NULL);
+ }
+
+ return 0;
+}
+
+static struct notifier_block i2cdev_notifier = {
+ .notifier_call = i2cdev_notifier_call,
};
/* ------------------------------------------------------------------------- */
@@ -607,10 +620,14 @@ static int __init i2c_dev_init(void)
goto out_unreg_chrdev;
}
- res = i2c_add_driver(&i2cdev_driver);
+ /* Keep track of adapters which will be added or removed later */
+ res = bus_register_notifier(&i2c_bus_type, &i2cdev_notifier);
if (res)
goto out_unreg_class;
+ /* Bind to already existing adapters right away */
+ i2c_for_each_dev(NULL, i2cdev_attach_adapter);
+
return 0;
out_unreg_class:
@@ -624,7 +641,8 @@ out:
static void __exit i2c_dev_exit(void)
{
- i2c_del_driver(&i2cdev_driver);
+ bus_unregister_notifier(&i2c_bus_type, &i2cdev_notifier);
+ i2c_for_each_dev(NULL, i2cdev_detach_adapter);
class_destroy(i2c_dev_class);
unregister_chrdev(I2C_MAJOR, "i2c");
}
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2024-12-01 19:01:40 +0000