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-rw-r--r--drivers/i2c/busses/Kconfig52
-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-ibm_iic.c9
-rw-r--r--drivers/i2c/busses/i2c-mpc.c22
-rw-r--r--drivers/i2c/busses/i2c-ocores.c16
-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.c116
-rw-r--r--drivers/i2c/busses/i2c-stu300.c2
-rw-r--r--drivers/i2c/busses/i2c-tegra.c700
-rw-r--r--drivers/i2c/i2c-core.c2
15 files changed, 2011 insertions, 139 deletions
diff --git a/drivers/i2c/busses/Kconfig b/drivers/i2c/busses/Kconfig
index e08e835..2a44a2f 100644
--- a/drivers/i2c/busses/Kconfig
+++ b/drivers/i2c/busses/Kconfig
@@ -433,7 +433,7 @@ 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,
@@ -533,17 +533,31 @@ 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
@@ -617,6 +631,13 @@ config I2C_STU300
This driver can also be built as a module. If so, the module
will be called i2c-stu300.
+config I2C_TEGRA
+ tristate "NVIDIA Tegra internal I2C controller"
+ depends on ARCH_TEGRA
+ help
+ If you say yes to this option, support will be included for the
+ I2C controller embedded in NVIDIA Tegra SOCs
+
config I2C_VERSATILE
tristate "ARM Versatile/Realview I2C bus support"
depends on ARCH_VERSATILE || ARCH_REALVIEW || ARCH_VEXPRESS
@@ -649,15 +670,28 @@ 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 77cf7e6..e6cf294 100644
--- a/drivers/i2c/busses/Makefile
+++ b/drivers/i2c/busses/Makefile
@@ -52,19 +52,23 @@ 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
obj-$(CONFIG_I2C_SH_MOBILE) += i2c-sh_mobile.o
obj-$(CONFIG_I2C_SIMTEC) += i2c-simtec.o
obj-$(CONFIG_I2C_STU300) += i2c-stu300.o
+obj-$(CONFIG_I2C_TEGRA) += i2c-tegra.o
obj-$(CONFIG_I2C_VERSATILE) += i2c-versatile.o
obj-$(CONFIG_I2C_OCTEON) += i2c-octeon.o
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 f2de3be..3a20961 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 0000000..7636671
--- /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 2e067dd..878a120 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-ibm_iic.c b/drivers/i2c/busses/i2c-ibm_iic.c
index 6e3c382..e4f88dc 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 b74e6dc..75b984c 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-ocores.c b/drivers/i2c/busses/i2c-ocores.c
index ef3bcb1..1b46a9d 100644
--- a/drivers/i2c/busses/i2c-ocores.c
+++ b/drivers/i2c/busses/i2c-ocores.c
@@ -249,7 +249,7 @@ 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) {
@@ -330,9 +330,7 @@ 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 +388,11 @@ 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 +405,7 @@ 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 b605ff3..58a58c7 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 0000000..fac6739
--- /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 0000000..6659d26
--- /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 f4c19a9..b914184 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 +959,17 @@ 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));
+ isr &= VALID_INT_SOURCE;
+ if (!isr)
+ 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 +984,7 @@ 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, _ISR(i2c));
if (isr & ISR_SAD)
i2c_pxa_slave_start(i2c, isr);
@@ -1001,6 +1051,7 @@ 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 +1095,13 @@ 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 +1129,7 @@ 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 +1139,19 @@ 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 495be45..266135d 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-tegra.c b/drivers/i2c/busses/i2c-tegra.c
new file mode 100644
index 0000000..3921f66
--- /dev/null
+++ b/drivers/i2c/busses/i2c-tegra.c
@@ -0,0 +1,700 @@
+/*
+ * drivers/i2c/busses/i2c-tegra.c
+ *
+ * Copyright (C) 2010 Google, Inc.
+ * Author: Colin Cross <ccross@android.com>
+ *
+ * This software is licensed under the terms of the GNU General Public
+ * License version 2, as published by the Free Software Foundation, and
+ * may be copied, distributed, and modified under those terms.
+ *
+ * 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.
+ *
+ */
+
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/platform_device.h>
+#include <linux/clk.h>
+#include <linux/err.h>
+#include <linux/i2c.h>
+#include <linux/io.h>
+#include <linux/interrupt.h>
+#include <linux/delay.h>
+#include <linux/slab.h>
+#include <linux/i2c-tegra.h>
+
+#include <asm/unaligned.h>
+
+#include <mach/clk.h>
+
+#define TEGRA_I2C_TIMEOUT (msecs_to_jiffies(1000))
+#define BYTES_PER_FIFO_WORD 4
+
+#define I2C_CNFG 0x000
+#define I2C_CNFG_PACKET_MODE_EN (1<<10)
+#define I2C_CNFG_NEW_MASTER_FSM (1<<11)
+#define I2C_SL_CNFG 0x020
+#define I2C_SL_CNFG_NEWSL (1<<2)
+#define I2C_SL_ADDR1 0x02c
+#define I2C_TX_FIFO 0x050
+#define I2C_RX_FIFO 0x054
+#define I2C_PACKET_TRANSFER_STATUS 0x058
+#define I2C_FIFO_CONTROL 0x05c
+#define I2C_FIFO_CONTROL_TX_FLUSH (1<<1)
+#define I2C_FIFO_CONTROL_RX_FLUSH (1<<0)
+#define I2C_FIFO_CONTROL_TX_TRIG_SHIFT 5
+#define I2C_FIFO_CONTROL_RX_TRIG_SHIFT 2
+#define I2C_FIFO_STATUS 0x060
+#define I2C_FIFO_STATUS_TX_MASK 0xF0
+#define I2C_FIFO_STATUS_TX_SHIFT 4
+#define I2C_FIFO_STATUS_RX_MASK 0x0F
+#define I2C_FIFO_STATUS_RX_SHIFT 0
+#define I2C_INT_MASK 0x064
+#define I2C_INT_STATUS 0x068
+#define I2C_INT_PACKET_XFER_COMPLETE (1<<7)
+#define I2C_INT_ALL_PACKETS_XFER_COMPLETE (1<<6)
+#define I2C_INT_TX_FIFO_OVERFLOW (1<<5)
+#define I2C_INT_RX_FIFO_UNDERFLOW (1<<4)
+#define I2C_INT_NO_ACK (1<<3)
+#define I2C_INT_ARBITRATION_LOST (1<<2)
+#define I2C_INT_TX_FIFO_DATA_REQ (1<<1)
+#define I2C_INT_RX_FIFO_DATA_REQ (1<<0)
+#define I2C_CLK_DIVISOR 0x06c
+
+#define DVC_CTRL_REG1 0x000
+#define DVC_CTRL_REG1_INTR_EN (1<<10)
+#define DVC_CTRL_REG2 0x004
+#define DVC_CTRL_REG3 0x008
+#define DVC_CTRL_REG3_SW_PROG (1<<26)
+#define DVC_CTRL_REG3_I2C_DONE_INTR_EN (1<<30)
+#define DVC_STATUS 0x00c
+#define DVC_STATUS_I2C_DONE_INTR (1<<30)
+
+#define I2C_ERR_NONE 0x00
+#define I2C_ERR_NO_ACK 0x01
+#define I2C_ERR_ARBITRATION_LOST 0x02
+
+#define PACKET_HEADER0_HEADER_SIZE_SHIFT 28
+#define PACKET_HEADER0_PACKET_ID_SHIFT 16
+#define PACKET_HEADER0_CONT_ID_SHIFT 12
+#define PACKET_HEADER0_PROTOCOL_I2C (1<<4)
+
+#define I2C_HEADER_HIGHSPEED_MODE (1<<22)
+#define I2C_HEADER_CONT_ON_NAK (1<<21)
+#define I2C_HEADER_SEND_START_BYTE (1<<20)
+#define I2C_HEADER_READ (1<<19)
+#define I2C_HEADER_10BIT_ADDR (1<<18)
+#define I2C_HEADER_IE_ENABLE (1<<17)
+#define I2C_HEADER_REPEAT_START (1<<16)
+#define I2C_HEADER_MASTER_ADDR_SHIFT 12
+#define I2C_HEADER_SLAVE_ADDR_SHIFT 1
+
+/**
+ * struct tegra_i2c_dev - per device i2c context
+ * @dev: device reference for power management
+ * @adapter: core i2c layer adapter information
+ * @clk: clock reference for i2c controller
+ * @i2c_clk: clock reference for i2c bus
+ * @iomem: memory resource for registers
+ * @base: ioremapped registers cookie
+ * @cont_id: i2c controller id, used for for packet header
+ * @irq: irq number of transfer complete interrupt
+ * @is_dvc: identifies the DVC i2c controller, has a different register layout
+ * @msg_complete: transfer completion notifier
+ * @msg_err: error code for completed message
+ * @msg_buf: pointer to current message data
+ * @msg_buf_remaining: size of unsent data in the message buffer
+ * @msg_read: identifies read transfers
+ * @bus_clk_rate: current i2c bus clock rate
+ * @is_suspended: prevents i2c controller accesses after suspend is called
+ */
+struct tegra_i2c_dev {
+ struct device *dev;
+ struct i2c_adapter adapter;
+ struct clk *clk;
+ struct clk *i2c_clk;
+ struct resource *iomem;
+ void __iomem *base;
+ int cont_id;
+ int irq;
+ int is_dvc;
+ struct completion msg_complete;
+ int msg_err;
+ u8 *msg_buf;
+ size_t msg_buf_remaining;
+ int msg_read;
+ unsigned long bus_clk_rate;
+ bool is_suspended;
+};
+
+static void dvc_writel(struct tegra_i2c_dev *i2c_dev, u32 val, unsigned long reg)
+{
+ writel(val, i2c_dev->base + reg);
+}
+
+static u32 dvc_readl(struct tegra_i2c_dev *i2c_dev, unsigned long reg)
+{
+ return readl(i2c_dev->base + reg);
+}
+
+/*
+ * i2c_writel and i2c_readl will offset the register if necessary to talk
+ * to the I2C block inside the DVC block
+ */
+static unsigned long tegra_i2c_reg_addr(struct tegra_i2c_dev *i2c_dev,
+ unsigned long reg)
+{
+ if (i2c_dev->is_dvc)
+ reg += (reg >= I2C_TX_FIFO) ? 0x10 : 0x40;
+ return reg;
+}
+
+static void i2c_writel(struct tegra_i2c_dev *i2c_dev, u32 val,
+ unsigned long reg)
+{
+ writel(val, i2c_dev->base + tegra_i2c_reg_addr(i2c_dev, reg));
+}
+
+static u32 i2c_readl(struct tegra_i2c_dev *i2c_dev, unsigned long reg)
+{
+ return readl(i2c_dev->base + tegra_i2c_reg_addr(i2c_dev, reg));
+}
+
+static void i2c_writesl(struct tegra_i2c_dev *i2c_dev, void *data,
+ unsigned long reg, int len)
+{
+ writesl(i2c_dev->base + tegra_i2c_reg_addr(i2c_dev, reg), data, len);
+}
+
+static void i2c_readsl(struct tegra_i2c_dev *i2c_dev, void *data,
+ unsigned long reg, int len)
+{
+ readsl(i2c_dev->base + tegra_i2c_reg_addr(i2c_dev, reg), data, len);
+}
+
+static void tegra_i2c_mask_irq(struct tegra_i2c_dev *i2c_dev, u32 mask)
+{
+ u32 int_mask = i2c_readl(i2c_dev, I2C_INT_MASK);
+ int_mask &= ~mask;
+ i2c_writel(i2c_dev, int_mask, I2C_INT_MASK);
+}
+
+static void tegra_i2c_unmask_irq(struct tegra_i2c_dev *i2c_dev, u32 mask)
+{
+ u32 int_mask = i2c_readl(i2c_dev, I2C_INT_MASK);
+ int_mask |= mask;
+ i2c_writel(i2c_dev, int_mask, I2C_INT_MASK);
+}
+
+static int tegra_i2c_flush_fifos(struct tegra_i2c_dev *i2c_dev)
+{
+ unsigned long timeout = jiffies + HZ;
+ u32 val = i2c_readl(i2c_dev, I2C_FIFO_CONTROL);
+ val |= I2C_FIFO_CONTROL_TX_FLUSH | I2C_FIFO_CONTROL_RX_FLUSH;
+ i2c_writel(i2c_dev, val, I2C_FIFO_CONTROL);
+
+ while (i2c_readl(i2c_dev, I2C_FIFO_CONTROL) &
+ (I2C_FIFO_CONTROL_TX_FLUSH | I2C_FIFO_CONTROL_RX_FLUSH)) {
+ if (time_after(jiffies, timeout)) {
+ dev_warn(i2c_dev->dev, "timeout waiting for fifo flush\n");
+ return -ETIMEDOUT;
+ }
+ msleep(1);
+ }
+ return 0;
+}
+
+static int tegra_i2c_empty_rx_fifo(struct tegra_i2c_dev *i2c_dev)
+{
+ u32 val;
+ int rx_fifo_avail;
+ u8 *buf = i2c_dev->msg_buf;
+ size_t buf_remaining = i2c_dev->msg_buf_remaining;
+ int words_to_transfer;
+
+ val = i2c_readl(i2c_dev, I2C_FIFO_STATUS);
+ rx_fifo_avail = (val & I2C_FIFO_STATUS_RX_MASK) >>
+ I2C_FIFO_STATUS_RX_SHIFT;
+
+ /* Rounds down to not include partial word at the end of buf */
+ words_to_transfer = buf_remaining / BYTES_PER_FIFO_WORD;
+ if (words_to_transfer > rx_fifo_avail)
+ words_to_transfer = rx_fifo_avail;
+
+ i2c_readsl(i2c_dev, buf, I2C_RX_FIFO, words_to_transfer);
+
+ buf += words_to_transfer * BYTES_PER_FIFO_WORD;
+ buf_remaining -= words_to_transfer * BYTES_PER_FIFO_WORD;
+ rx_fifo_avail -= words_to_transfer;
+
+ /*
+ * If there is a partial word at the end of buf, handle it manually to
+ * prevent overwriting past the end of buf
+ */
+ if (rx_fifo_avail > 0 && buf_remaining > 0) {
+ BUG_ON(buf_remaining > 3);
+ val = i2c_readl(i2c_dev, I2C_RX_FIFO);
+ memcpy(buf, &val, buf_remaining);
+ buf_remaining = 0;
+ rx_fifo_avail--;
+ }
+
+ BUG_ON(rx_fifo_avail > 0 && buf_remaining > 0);
+ i2c_dev->msg_buf_remaining = buf_remaining;
+ i2c_dev->msg_buf = buf;
+ return 0;
+}
+
+static int tegra_i2c_fill_tx_fifo(struct tegra_i2c_dev *i2c_dev)
+{
+ u32 val;
+ int tx_fifo_avail;
+ u8 *buf = i2c_dev->msg_buf;
+ size_t buf_remaining = i2c_dev->msg_buf_remaining;
+ int words_to_transfer;
+
+ val = i2c_readl(i2c_dev, I2C_FIFO_STATUS);
+ tx_fifo_avail = (val & I2C_FIFO_STATUS_TX_MASK) >>
+ I2C_FIFO_STATUS_TX_SHIFT;
+
+ /* Rounds down to not include partial word at the end of buf */
+ words_to_transfer = buf_remaining / BYTES_PER_FIFO_WORD;
+ if (words_to_transfer > tx_fifo_avail)
+ words_to_transfer = tx_fifo_avail;
+
+ i2c_writesl(i2c_dev, buf, I2C_TX_FIFO, words_to_transfer);
+
+ buf += words_to_transfer * BYTES_PER_FIFO_WORD;
+ buf_remaining -= words_to_transfer * BYTES_PER_FIFO_WORD;
+ tx_fifo_avail -= words_to_transfer;
+
+ /*
+ * If there is a partial word at the end of buf, handle it manually to
+ * prevent reading past the end of buf, which could cross a page
+ * boundary and fault.
+ */
+ if (tx_fifo_avail > 0 && buf_remaining > 0) {
+ BUG_ON(buf_remaining > 3);
+ memcpy(&val, buf, buf_remaining);
+ i2c_writel(i2c_dev, val, I2C_TX_FIFO);
+ buf_remaining = 0;
+ tx_fifo_avail--;
+ }
+
+ BUG_ON(tx_fifo_avail > 0 && buf_remaining > 0);
+ i2c_dev->msg_buf_remaining = buf_remaining;
+ i2c_dev->msg_buf = buf;
+ return 0;
+}
+
+/*
+ * One of the Tegra I2C blocks is inside the DVC (Digital Voltage Controller)
+ * block. This block is identical to the rest of the I2C blocks, except that
+ * it only supports master mode, it has registers moved around, and it needs
+ * some extra init to get it into I2C mode. The register moves are handled
+ * by i2c_readl and i2c_writel
+ */
+static void tegra_dvc_init(struct tegra_i2c_dev *i2c_dev)
+{
+ u32 val = 0;
+ val = dvc_readl(i2c_dev, DVC_CTRL_REG3);
+ val |= DVC_CTRL_REG3_SW_PROG;
+ val |= DVC_CTRL_REG3_I2C_DONE_INTR_EN;
+ dvc_writel(i2c_dev, val, DVC_CTRL_REG3);
+
+ val = dvc_readl(i2c_dev, DVC_CTRL_REG1);
+ val |= DVC_CTRL_REG1_INTR_EN;
+ dvc_writel(i2c_dev, val, DVC_CTRL_REG1);
+}
+
+static int tegra_i2c_init(struct tegra_i2c_dev *i2c_dev)
+{
+ u32 val;
+ int err = 0;
+
+ clk_enable(i2c_dev->clk);
+
+ tegra_periph_reset_assert(i2c_dev->clk);
+ udelay(2);
+ tegra_periph_reset_deassert(i2c_dev->clk);
+
+ if (i2c_dev->is_dvc)
+ tegra_dvc_init(i2c_dev);
+
+ val = I2C_CNFG_NEW_MASTER_FSM | I2C_CNFG_PACKET_MODE_EN;
+ i2c_writel(i2c_dev, val, I2C_CNFG);
+ i2c_writel(i2c_dev, 0, I2C_INT_MASK);
+ clk_set_rate(i2c_dev->clk, i2c_dev->bus_clk_rate * 8);
+
+ val = 7 << I2C_FIFO_CONTROL_TX_TRIG_SHIFT |
+ 0 << I2C_FIFO_CONTROL_RX_TRIG_SHIFT;
+ i2c_writel(i2c_dev, val, I2C_FIFO_CONTROL);
+
+ if (tegra_i2c_flush_fifos(i2c_dev))
+ err = -ETIMEDOUT;
+
+ clk_disable(i2c_dev->clk);
+ return err;
+}
+
+static irqreturn_t tegra_i2c_isr(int irq, void *dev_id)
+{
+ u32 status;
+ const u32 status_err = I2C_INT_NO_ACK | I2C_INT_ARBITRATION_LOST;
+ struct tegra_i2c_dev *i2c_dev = dev_id;
+
+ status = i2c_readl(i2c_dev, I2C_INT_STATUS);
+
+ if (status == 0) {
+ dev_warn(i2c_dev->dev, "interrupt with no status\n");
+ return IRQ_NONE;
+ }
+
+ if (unlikely(status & status_err)) {
+ if (status & I2C_INT_NO_ACK)
+ i2c_dev->msg_err |= I2C_ERR_NO_ACK;
+ if (status & I2C_INT_ARBITRATION_LOST)
+ i2c_dev->msg_err |= I2C_ERR_ARBITRATION_LOST;
+ complete(&i2c_dev->msg_complete);
+ goto err;
+ }
+
+ if (i2c_dev->msg_read && (status & I2C_INT_RX_FIFO_DATA_REQ)) {
+ if (i2c_dev->msg_buf_remaining)
+ tegra_i2c_empty_rx_fifo(i2c_dev);
+ else
+ BUG();
+ }
+
+ if (!i2c_dev->msg_read && (status & I2C_INT_TX_FIFO_DATA_REQ)) {
+ if (i2c_dev->msg_buf_remaining)
+ tegra_i2c_fill_tx_fifo(i2c_dev);
+ else
+ tegra_i2c_mask_irq(i2c_dev, I2C_INT_TX_FIFO_DATA_REQ);
+ }
+
+ if ((status & I2C_INT_PACKET_XFER_COMPLETE) &&
+ !i2c_dev->msg_buf_remaining)
+ complete(&i2c_dev->msg_complete);
+
+ i2c_writel(i2c_dev, status, I2C_INT_STATUS);
+ if (i2c_dev->is_dvc)
+ dvc_writel(i2c_dev, DVC_STATUS_I2C_DONE_INTR, DVC_STATUS);
+ return IRQ_HANDLED;
+err:
+ /* An error occured, mask all interrupts */
+ tegra_i2c_mask_irq(i2c_dev, I2C_INT_NO_ACK | I2C_INT_ARBITRATION_LOST |
+ I2C_INT_PACKET_XFER_COMPLETE | I2C_INT_TX_FIFO_DATA_REQ |
+ I2C_INT_RX_FIFO_DATA_REQ);
+ i2c_writel(i2c_dev, status, I2C_INT_STATUS);
+ return IRQ_HANDLED;
+}
+
+static int tegra_i2c_xfer_msg(struct tegra_i2c_dev *i2c_dev,
+ struct i2c_msg *msg, int stop)
+{
+ u32 packet_header;
+ u32 int_mask;
+ int ret;
+
+ tegra_i2c_flush_fifos(i2c_dev);
+ i2c_writel(i2c_dev, 0xFF, I2C_INT_STATUS);
+
+ if (msg->len == 0)
+ return -EINVAL;
+
+ i2c_dev->msg_buf = msg->buf;
+ i2c_dev->msg_buf_remaining = msg->len;
+ i2c_dev->msg_err = I2C_ERR_NONE;
+ i2c_dev->msg_read = (msg->flags & I2C_M_RD);
+ INIT_COMPLETION(i2c_dev->msg_complete);
+
+ packet_header = (0 << PACKET_HEADER0_HEADER_SIZE_SHIFT) |
+ PACKET_HEADER0_PROTOCOL_I2C |
+ (i2c_dev->cont_id << PACKET_HEADER0_CONT_ID_SHIFT) |
+ (1 << PACKET_HEADER0_PACKET_ID_SHIFT);
+ i2c_writel(i2c_dev, packet_header, I2C_TX_FIFO);
+
+ packet_header = msg->len - 1;
+ i2c_writel(i2c_dev, packet_header, I2C_TX_FIFO);
+
+ packet_header = msg->addr << I2C_HEADER_SLAVE_ADDR_SHIFT;
+ packet_header |= I2C_HEADER_IE_ENABLE;
+ if (msg->flags & I2C_M_TEN)
+ packet_header |= I2C_HEADER_10BIT_ADDR;
+ if (msg->flags & I2C_M_IGNORE_NAK)
+ packet_header |= I2C_HEADER_CONT_ON_NAK;
+ if (msg->flags & I2C_M_NOSTART)
+ packet_header |= I2C_HEADER_REPEAT_START;
+ if (msg->flags & I2C_M_RD)
+ packet_header |= I2C_HEADER_READ;
+ i2c_writel(i2c_dev, packet_header, I2C_TX_FIFO);
+
+ if (!(msg->flags & I2C_M_RD))
+ tegra_i2c_fill_tx_fifo(i2c_dev);
+
+ int_mask = I2C_INT_NO_ACK | I2C_INT_ARBITRATION_LOST;
+ if (msg->flags & I2C_M_RD)
+ int_mask |= I2C_INT_RX_FIFO_DATA_REQ;
+ else if (i2c_dev->msg_buf_remaining)
+ int_mask |= I2C_INT_TX_FIFO_DATA_REQ;
+ tegra_i2c_unmask_irq(i2c_dev, int_mask);
+ dev_dbg(i2c_dev->dev, "unmasked irq: %02x\n",
+ i2c_readl(i2c_dev, I2C_INT_MASK));
+
+ ret = wait_for_completion_timeout(&i2c_dev->msg_complete, TEGRA_I2C_TIMEOUT);
+ tegra_i2c_mask_irq(i2c_dev, int_mask);
+
+ if (WARN_ON(ret == 0)) {
+ dev_err(i2c_dev->dev, "i2c transfer timed out\n");
+
+ tegra_i2c_init(i2c_dev);
+ return -ETIMEDOUT;
+ }
+
+ dev_dbg(i2c_dev->dev, "transfer complete: %d %d %d\n",
+ ret, completion_done(&i2c_dev->msg_complete), i2c_dev->msg_err);
+
+ if (likely(i2c_dev->msg_err == I2C_ERR_NONE))
+ return 0;
+
+ tegra_i2c_init(i2c_dev);
+ if (i2c_dev->msg_err == I2C_ERR_NO_ACK) {
+ if (msg->flags & I2C_M_IGNORE_NAK)
+ return 0;
+ return -EREMOTEIO;
+ }
+
+ return -EIO;
+}
+
+static int tegra_i2c_xfer(struct i2c_adapter *adap, struct i2c_msg msgs[],
+ int num)
+{
+ struct tegra_i2c_dev *i2c_dev = i2c_get_adapdata(adap);
+ int i;
+ int ret = 0;
+
+ if (i2c_dev->is_suspended)
+ return -EBUSY;
+
+ clk_enable(i2c_dev->clk);
+ for (i = 0; i < num; i++) {
+ int stop = (i == (num - 1)) ? 1 : 0;
+ ret = tegra_i2c_xfer_msg(i2c_dev, &msgs[i], stop);
+ if (ret)
+ break;
+ }
+ clk_disable(i2c_dev->clk);
+ return ret ?: i;
+}
+
+static u32 tegra_i2c_func(struct i2c_adapter *adap)
+{
+ return I2C_FUNC_I2C;
+}
+
+static const struct i2c_algorithm tegra_i2c_algo = {
+ .master_xfer = tegra_i2c_xfer,
+ .functionality = tegra_i2c_func,
+};
+
+static int tegra_i2c_probe(struct platform_device *pdev)
+{
+ struct tegra_i2c_dev *i2c_dev;
+ struct tegra_i2c_platform_data *pdata = pdev->dev.platform_data;
+ struct resource *res;
+ struct resource *iomem;
+ struct clk *clk;
+ struct clk *i2c_clk;
+ void *base;
+ int irq;
+ int ret = 0;
+
+ res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ if (!res) {
+ dev_err(&pdev->dev, "no mem resource\n");
+ return -EINVAL;
+ }
+ iomem = request_mem_region(res->start, resource_size(res), pdev->name);
+ if (!iomem) {
+ dev_err(&pdev->dev, "I2C region already claimed\n");
+ return -EBUSY;
+ }
+
+ base = ioremap(iomem->start, resource_size(iomem));
+ if (!base) {
+ dev_err(&pdev->dev, "Cannot ioremap I2C region\n");
+ return -ENOMEM;
+ }
+
+ res = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
+ if (!res) {
+ dev_err(&pdev->dev, "no irq resource\n");
+ ret = -EINVAL;
+ goto err_iounmap;
+ }
+ irq = res->start;
+
+ clk = clk_get(&pdev->dev, NULL);
+ if (IS_ERR(clk)) {
+ dev_err(&pdev->dev, "missing controller clock");
+ ret = PTR_ERR(clk);
+ goto err_release_region;
+ }
+
+ i2c_clk = clk_get(&pdev->dev, "i2c");
+ if (IS_ERR(i2c_clk)) {
+ dev_err(&pdev->dev, "missing bus clock");
+ ret = PTR_ERR(i2c_clk);
+ goto err_clk_put;
+ }
+
+ i2c_dev = kzalloc(sizeof(struct tegra_i2c_dev), GFP_KERNEL);
+ if (!i2c_dev) {
+ ret = -ENOMEM;
+ goto err_i2c_clk_put;
+ }
+
+ i2c_dev->base = base;
+ i2c_dev->clk = clk;
+ i2c_dev->i2c_clk = i2c_clk;
+ i2c_dev->iomem = iomem;
+ i2c_dev->adapter.algo = &tegra_i2c_algo;
+ i2c_dev->irq = irq;
+ i2c_dev->cont_id = pdev->id;
+ i2c_dev->dev = &pdev->dev;
+ i2c_dev->bus_clk_rate = pdata ? pdata->bus_clk_rate : 100000;
+
+ if (pdev->id == 3)
+ i2c_dev->is_dvc = 1;
+ init_completion(&i2c_dev->msg_complete);
+
+ platform_set_drvdata(pdev, i2c_dev);
+
+ ret = tegra_i2c_init(i2c_dev);
+ if (ret) {
+ dev_err(&pdev->dev, "Failed to initialize i2c controller");
+ goto err_free;
+ }
+
+ ret = request_irq(i2c_dev->irq, tegra_i2c_isr, 0, pdev->name, i2c_dev);
+ if (ret) {
+ dev_err(&pdev->dev, "Failed to request irq %i\n", i2c_dev->irq);
+ goto err_free;
+ }
+
+ clk_enable(i2c_dev->i2c_clk);
+
+ i2c_set_adapdata(&i2c_dev->adapter, i2c_dev);
+ i2c_dev->adapter.owner = THIS_MODULE;
+ i2c_dev->adapter.class = I2C_CLASS_HWMON;
+ strlcpy(i2c_dev->adapter.name, "Tegra I2C adapter",
+ sizeof(i2c_dev->adapter.name));
+ i2c_dev->adapter.algo = &tegra_i2c_algo;
+ i2c_dev->adapter.dev.parent = &pdev->dev;
+ i2c_dev->adapter.nr = pdev->id;
+
+ ret = i2c_add_numbered_adapter(&i2c_dev->adapter);
+ if (ret) {
+ dev_err(&pdev->dev, "Failed to add I2C adapter\n");
+ goto err_free_irq;
+ }
+
+ return 0;
+err_free_irq:
+ free_irq(i2c_dev->irq, i2c_dev);
+err_free:
+ kfree(i2c_dev);
+err_i2c_clk_put:
+ clk_put(i2c_clk);
+err_clk_put:
+ clk_put(clk);
+err_release_region:
+ release_mem_region(iomem->start, resource_size(iomem));
+err_iounmap:
+ iounmap(base);
+ return ret;
+}
+
+static int tegra_i2c_remove(struct platform_device *pdev)
+{
+ struct tegra_i2c_dev *i2c_dev = platform_get_drvdata(pdev);
+ i2c_del_adapter(&i2c_dev->adapter);
+ free_irq(i2c_dev->irq, i2c_dev);
+ clk_put(i2c_dev->i2c_clk);
+ clk_put(i2c_dev->clk);
+ release_mem_region(i2c_dev->iomem->start,
+ resource_size(i2c_dev->iomem));
+ iounmap(i2c_dev->base);
+ kfree(i2c_dev);
+ return 0;
+}
+
+#ifdef CONFIG_PM
+static int tegra_i2c_suspend(struct platform_device *pdev, pm_message_t state)
+{
+ struct tegra_i2c_dev *i2c_dev = platform_get_drvdata(pdev);
+
+ i2c_lock_adapter(&i2c_dev->adapter);
+ i2c_dev->is_suspended = true;
+ i2c_unlock_adapter(&i2c_dev->adapter);
+
+ return 0;
+}
+
+static int tegra_i2c_resume(struct platform_device *pdev)
+{
+ struct tegra_i2c_dev *i2c_dev = platform_get_drvdata(pdev);
+ int ret;
+
+ i2c_lock_adapter(&i2c_dev->adapter);
+
+ ret = tegra_i2c_init(i2c_dev);
+
+ if (ret) {
+ i2c_unlock_adapter(&i2c_dev->adapter);
+ return ret;
+ }
+
+ i2c_dev->is_suspended = false;
+
+ i2c_unlock_adapter(&i2c_dev->adapter);
+
+ return 0;
+}
+#endif
+
+static struct platform_driver tegra_i2c_driver = {
+ .probe = tegra_i2c_probe,
+ .remove = tegra_i2c_remove,
+#ifdef CONFIG_PM
+ .suspend = tegra_i2c_suspend,
+ .resume = tegra_i2c_resume,
+#endif
+ .driver = {
+ .name = "tegra-i2c",
+ .owner = THIS_MODULE,
+ },
+};
+
+static int __init tegra_i2c_init_driver(void)
+{
+ return platform_driver_register(&tegra_i2c_driver);
+}
+
+static void __exit tegra_i2c_exit_driver(void)
+{
+ platform_driver_unregister(&tegra_i2c_driver);
+}
+
+subsys_initcall(tegra_i2c_init_driver);
+module_exit(tegra_i2c_exit_driver);
+
+MODULE_DESCRIPTION("nVidia Tegra2 I2C Bus Controller driver");
+MODULE_AUTHOR("Colin Cross");
+MODULE_LICENSE("GPL v2");
diff --git a/drivers/i2c/i2c-core.c b/drivers/i2c/i2c-core.c
index f0bd5bc..045ba6e 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);
generated by cgit v1.1 at 2024-06-12 12:37:57 +0000