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-rw-r--r--drivers/i2c/busses/Kconfig12
-rw-r--r--drivers/i2c/busses/i2c-eg20t.c2
-rw-r--r--drivers/i2c/busses/i2c-i801.c60
-rw-r--r--drivers/i2c/busses/i2c-nomadik.c276
-rw-r--r--drivers/i2c/busses/i2c-parport-light.c10
-rw-r--r--drivers/i2c/busses/i2c-parport.c30
-rw-r--r--drivers/i2c/busses/i2c-parport.h74
-rw-r--r--drivers/i2c/busses/i2c-sh_mobile.c20
-rw-r--r--drivers/i2c/busses/i2c-tegra.c39
9 files changed, 336 insertions, 187 deletions
diff --git a/drivers/i2c/busses/Kconfig b/drivers/i2c/busses/Kconfig
index 326652f673f7..646068e5100b 100644
--- a/drivers/i2c/busses/Kconfig
+++ b/drivers/i2c/busses/Kconfig
@@ -79,6 +79,7 @@ config I2C_AMD8111
config I2C_I801
tristate "Intel 82801 (ICH/PCH)"
depends on PCI
+ select CHECK_SIGNATURE if X86 && DMI
help
If you say yes to this option, support will be included for the Intel
801 family of mainboard I2C interfaces. Specifically, the following
@@ -101,6 +102,7 @@ config I2C_I801
6 Series (PCH)
Patsburg (PCH)
DH89xxCC (PCH)
+ Panther Point (PCH)
This driver can also be built as a module. If so, the module
will be called i2c-i801.
@@ -671,15 +673,19 @@ config I2C_XILINX
will be called xilinx_i2c.
config I2C_EG20T
- tristate "Intel EG20T PCH/OKI SEMICONDUCTOR ML7213 IOH"
+ tristate "Intel EG20T PCH / OKI SEMICONDUCTOR IOH(ML7213/ML7223)"
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.
+ This driver also can be used for OKI SEMICONDUCTOR IOH(Input/
+ Output Hub), ML7213 and ML7223.
+ ML7213 IOH is for IVI(In-Vehicle Infotainment) use and ML7223 IOH is
+ for MP(Media Phone) use.
+ ML7213/ML7223 is companion chip for Intel Atom E6xx series.
+ ML7213/ML7223 is completely compatible for Intel EG20T PCH.
comment "External I2C/SMBus adapter drivers"
diff --git a/drivers/i2c/busses/i2c-eg20t.c b/drivers/i2c/busses/i2c-eg20t.c
index 878a12026af2..8abfa4a03ce1 100644
--- a/drivers/i2c/busses/i2c-eg20t.c
+++ b/drivers/i2c/busses/i2c-eg20t.c
@@ -182,10 +182,12 @@ static DEFINE_MUTEX(pch_mutex);
/* Definition for ML7213 by OKI SEMICONDUCTOR */
#define PCI_VENDOR_ID_ROHM 0x10DB
#define PCI_DEVICE_ID_ML7213_I2C 0x802D
+#define PCI_DEVICE_ID_ML7223_I2C 0x8010
static struct pci_device_id __devinitdata pch_pcidev_id[] = {
{ PCI_VDEVICE(INTEL, PCI_DEVICE_ID_PCH_I2C), 1, },
{ PCI_VDEVICE(ROHM, PCI_DEVICE_ID_ML7213_I2C), 2, },
+ { PCI_VDEVICE(ROHM, PCI_DEVICE_ID_ML7223_I2C), 1, },
{0,}
};
diff --git a/drivers/i2c/busses/i2c-i801.c b/drivers/i2c/busses/i2c-i801.c
index 455e909bc768..ab26840d0c70 100644
--- a/drivers/i2c/busses/i2c-i801.c
+++ b/drivers/i2c/busses/i2c-i801.c
@@ -50,6 +50,7 @@
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
+ Panther Point (PCH) 0x1e22 32 hard yes yes yes
Features supported by this driver:
Software PEC no
@@ -141,6 +142,7 @@
#define PCI_DEVICE_ID_INTEL_PATSBURG_SMBUS_IDF0 0x1d70
#define PCI_DEVICE_ID_INTEL_PATSBURG_SMBUS_IDF1 0x1d71
#define PCI_DEVICE_ID_INTEL_PATSBURG_SMBUS_IDF2 0x1d72
+#define PCI_DEVICE_ID_INTEL_PANTHERPOINT_SMBUS 0x1e22
#define PCI_DEVICE_ID_INTEL_DH89XXCC_SMBUS 0x2330
#define PCI_DEVICE_ID_INTEL_5_3400_SERIES_SMBUS 0x3b30
@@ -158,6 +160,8 @@ static struct pci_driver i801_driver;
#define FEATURE_BLOCK_BUFFER (1 << 1)
#define FEATURE_BLOCK_PROC (1 << 2)
#define FEATURE_I2C_BLOCK_READ (1 << 3)
+/* Not really a feature, but it's convenient to handle it as such */
+#define FEATURE_IDF (1 << 15)
static const char *i801_feature_names[] = {
"SMBus PEC",
@@ -628,12 +632,13 @@ static const struct pci_device_id i801_ids[] = {
{ 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) },
+ { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_PANTHERPOINT_SMBUS) },
{ 0, }
};
MODULE_DEVICE_TABLE(pci, i801_ids);
-#if defined CONFIG_INPUT_APANEL || defined CONFIG_INPUT_APANEL_MODULE
+#if defined CONFIG_X86 && defined CONFIG_DMI
static unsigned char apanel_addr;
/* Scan the system ROM for the signature "FJKEYINF" */
@@ -663,11 +668,7 @@ static void __init input_apanel_init(void)
}
iounmap(bios);
}
-#else
-static void __init input_apanel_init(void) {}
-#endif
-#if defined CONFIG_SENSORS_FSCHMD || defined CONFIG_SENSORS_FSCHMD_MODULE
struct dmi_onboard_device_info {
const char *name;
u8 type;
@@ -733,7 +734,30 @@ static void __devinit dmi_check_onboard_devices(const struct dmi_header *dm,
dmi_check_onboard_device(type, name, adap);
}
}
-#endif
+
+/* Register optional slaves */
+static void __devinit i801_probe_optional_slaves(struct i801_priv *priv)
+{
+ /* Only register slaves on main SMBus channel */
+ if (priv->features & FEATURE_IDF)
+ return;
+
+ if (apanel_addr) {
+ struct i2c_board_info info;
+
+ memset(&info, 0, sizeof(struct i2c_board_info));
+ info.addr = apanel_addr;
+ strlcpy(info.type, "fujitsu_apanel", I2C_NAME_SIZE);
+ i2c_new_device(&priv->adapter, &info);
+ }
+
+ if (dmi_name_in_vendors("FUJITSU"))
+ dmi_walk(dmi_check_onboard_devices, &priv->adapter);
+}
+#else
+static void __init input_apanel_init(void) {}
+static void __devinit i801_probe_optional_slaves(struct i801_priv *priv) {}
+#endif /* CONFIG_X86 && CONFIG_DMI */
static int __devinit i801_probe(struct pci_dev *dev,
const struct pci_device_id *id)
@@ -753,6 +777,11 @@ static int __devinit i801_probe(struct pci_dev *dev,
priv->pci_dev = dev;
switch (dev->device) {
+ case PCI_DEVICE_ID_INTEL_PATSBURG_SMBUS_IDF0:
+ case PCI_DEVICE_ID_INTEL_PATSBURG_SMBUS_IDF1:
+ case PCI_DEVICE_ID_INTEL_PATSBURG_SMBUS_IDF2:
+ priv->features |= FEATURE_IDF;
+ /* fall through */
default:
priv->features |= FEATURE_I2C_BLOCK_READ;
/* fall through */
@@ -838,21 +867,7 @@ static int __devinit i801_probe(struct pci_dev *dev,
goto exit_release;
}
- /* Register optional slaves */
-#if defined CONFIG_INPUT_APANEL || defined CONFIG_INPUT_APANEL_MODULE
- if (apanel_addr) {
- struct i2c_board_info info;
-
- memset(&info, 0, sizeof(struct i2c_board_info));
- info.addr = apanel_addr;
- strlcpy(info.type, "fujitsu_apanel", I2C_NAME_SIZE);
- i2c_new_device(&priv->adapter, &info);
- }
-#endif
-#if defined CONFIG_SENSORS_FSCHMD || defined CONFIG_SENSORS_FSCHMD_MODULE
- if (dmi_name_in_vendors("FUJITSU"))
- dmi_walk(dmi_check_onboard_devices, &priv->adapter);
-#endif
+ i801_probe_optional_slaves(priv);
pci_set_drvdata(dev, priv);
return 0;
@@ -912,7 +927,8 @@ static struct pci_driver i801_driver = {
static int __init i2c_i801_init(void)
{
- input_apanel_init();
+ if (dmi_name_in_vendors("FUJITSU"))
+ input_apanel_init();
return pci_register_driver(&i801_driver);
}
diff --git a/drivers/i2c/busses/i2c-nomadik.c b/drivers/i2c/busses/i2c-nomadik.c
index e10e5cf3751a..0c731ca69f15 100644
--- a/drivers/i2c/busses/i2c-nomadik.c
+++ b/drivers/i2c/busses/i2c-nomadik.c
@@ -15,13 +15,14 @@
#include <linux/init.h>
#include <linux/module.h>
#include <linux/platform_device.h>
-#include <linux/delay.h>
#include <linux/slab.h>
#include <linux/interrupt.h>
#include <linux/i2c.h>
#include <linux/err.h>
#include <linux/clk.h>
#include <linux/io.h>
+#include <linux/regulator/consumer.h>
+#include <linux/pm_runtime.h>
#include <plat/i2c.h>
@@ -103,9 +104,6 @@
/* maximum threshold value */
#define MAX_I2C_FIFO_THRESHOLD 15
-/* per-transfer delay, required for the hardware to stabilize */
-#define I2C_DELAY 150
-
enum i2c_status {
I2C_NOP,
I2C_ON_GOING,
@@ -120,9 +118,6 @@ enum i2c_operation {
I2C_READ = 0x01
};
-/* controller response timeout in ms */
-#define I2C_TIMEOUT_MS 2000
-
/**
* struct i2c_nmk_client - client specific data
* @slave_adr: 7-bit slave address
@@ -151,6 +146,7 @@ struct i2c_nmk_client {
* @stop: stop condition
* @xfer_complete: acknowledge completion for a I2C message
* @result: controller propogated result
+ * @busy: Busy doing transfer
*/
struct nmk_i2c_dev {
struct platform_device *pdev;
@@ -163,6 +159,8 @@ struct nmk_i2c_dev {
int stop;
struct completion xfer_complete;
int result;
+ struct regulator *regulator;
+ bool busy;
};
/* controller's abort causes */
@@ -209,7 +207,7 @@ static int flush_i2c_fifo(struct nmk_i2c_dev *dev)
writel((I2C_CR_FTX | I2C_CR_FRX), dev->virtbase + I2C_CR);
for (i = 0; i < LOOP_ATTEMPTS; i++) {
- timeout = jiffies + msecs_to_jiffies(I2C_TIMEOUT_MS);
+ timeout = jiffies + dev->adap.timeout;
while (!time_after(jiffies, timeout)) {
if ((readl(dev->virtbase + I2C_CR) &
@@ -253,11 +251,9 @@ static int init_hw(struct nmk_i2c_dev *dev)
{
int stat;
- clk_enable(dev->clk);
-
stat = flush_i2c_fifo(dev);
if (stat)
- return stat;
+ goto exit;
/* disable the controller */
i2c_clr_bit(dev->virtbase + I2C_CR , I2C_CR_PE);
@@ -268,10 +264,8 @@ static int init_hw(struct nmk_i2c_dev *dev)
dev->cli.operation = I2C_NO_OPERATION;
- clk_disable(dev->clk);
-
- udelay(I2C_DELAY);
- return 0;
+exit:
+ return stat;
}
/* enable peripheral, master mode operation */
@@ -424,7 +418,7 @@ static int read_i2c(struct nmk_i2c_dev *dev)
dev->virtbase + I2C_IMSCR);
timeout = wait_for_completion_interruptible_timeout(
- &dev->xfer_complete, msecs_to_jiffies(I2C_TIMEOUT_MS));
+ &dev->xfer_complete, dev->adap.timeout);
if (timeout < 0) {
dev_err(&dev->pdev->dev,
@@ -434,14 +428,32 @@ static int read_i2c(struct nmk_i2c_dev *dev)
}
if (timeout == 0) {
- /* controller has timedout, re-init the h/w */
- dev_err(&dev->pdev->dev, "controller timed out, re-init h/w\n");
- (void) init_hw(dev);
+ /* Controller timed out */
+ dev_err(&dev->pdev->dev, "read from slave 0x%x timed out\n",
+ dev->cli.slave_adr);
status = -ETIMEDOUT;
}
return status;
}
+static void fill_tx_fifo(struct nmk_i2c_dev *dev, int no_bytes)
+{
+ int count;
+
+ for (count = (no_bytes - 2);
+ (count > 0) &&
+ (dev->cli.count != 0);
+ count--) {
+ /* write to the Tx FIFO */
+ writeb(*dev->cli.buffer,
+ dev->virtbase + I2C_TFR);
+ dev->cli.buffer++;
+ dev->cli.count--;
+ dev->cli.xfer_bytes++;
+ }
+
+}
+
/**
* write_i2c() - Write data to I2C client.
* @dev: private data of I2C Driver
@@ -469,8 +481,13 @@ static int write_i2c(struct nmk_i2c_dev *dev)
init_completion(&dev->xfer_complete);
/* enable interrupts by settings the masks */
- irq_mask = (I2C_IT_TXFNE | I2C_IT_TXFOVR |
- I2C_IT_MAL | I2C_IT_BERR);
+ irq_mask = (I2C_IT_TXFOVR | I2C_IT_MAL | I2C_IT_BERR);
+
+ /* Fill the TX FIFO with transmit data */
+ fill_tx_fifo(dev, MAX_I2C_FIFO_THRESHOLD);
+
+ if (dev->cli.count != 0)
+ irq_mask |= I2C_IT_TXFNE;
/*
* check if we want to transfer a single or multiple bytes, if so
@@ -488,7 +505,7 @@ static int write_i2c(struct nmk_i2c_dev *dev)
dev->virtbase + I2C_IMSCR);
timeout = wait_for_completion_interruptible_timeout(
- &dev->xfer_complete, msecs_to_jiffies(I2C_TIMEOUT_MS));
+ &dev->xfer_complete, dev->adap.timeout);
if (timeout < 0) {
dev_err(&dev->pdev->dev,
@@ -498,9 +515,9 @@ static int write_i2c(struct nmk_i2c_dev *dev)
}
if (timeout == 0) {
- /* controller has timedout, re-init the h/w */
- dev_err(&dev->pdev->dev, "controller timed out, re-init h/w\n");
- (void) init_hw(dev);
+ /* Controller timed out */
+ dev_err(&dev->pdev->dev, "write to slave 0x%x timed out\n",
+ dev->cli.slave_adr);
status = -ETIMEDOUT;
}
@@ -508,6 +525,51 @@ static int write_i2c(struct nmk_i2c_dev *dev)
}
/**
+ * nmk_i2c_xfer_one() - transmit a single I2C message
+ * @dev: device with a message encoded into it
+ * @flags: message flags
+ */
+static int nmk_i2c_xfer_one(struct nmk_i2c_dev *dev, u16 flags)
+{
+ int status;
+
+ if (flags & I2C_M_RD) {
+ /* read operation */
+ dev->cli.operation = I2C_READ;
+ status = read_i2c(dev);
+ } else {
+ /* write operation */
+ dev->cli.operation = I2C_WRITE;
+ status = write_i2c(dev);
+ }
+
+ if (status || (dev->result)) {
+ u32 i2c_sr;
+ u32 cause;
+
+ i2c_sr = readl(dev->virtbase + I2C_SR);
+ /*
+ * Check if the controller I2C operation status
+ * is set to ABORT(11b).
+ */
+ if (((i2c_sr >> 2) & 0x3) == 0x3) {
+ /* get the abort cause */
+ cause = (i2c_sr >> 4) & 0x7;
+ dev_err(&dev->pdev->dev, "%s\n", cause
+ >= ARRAY_SIZE(abort_causes) ?
+ "unknown reason" :
+ abort_causes[cause]);
+ }
+
+ (void) init_hw(dev);
+
+ status = status ? status : dev->result;
+ }
+
+ return status;
+}
+
+/**
* nmk_i2c_xfer() - I2C transfer function used by kernel framework
* @i2c_adap: Adapter pointer to the controller
* @msgs: Pointer to data to be written.
@@ -559,53 +621,55 @@ static int nmk_i2c_xfer(struct i2c_adapter *i2c_adap,
{
int status;
int i;
- u32 cause;
struct nmk_i2c_dev *dev = i2c_get_adapdata(i2c_adap);
+ int j;
+
+ dev->busy = true;
+
+ if (dev->regulator)
+ regulator_enable(dev->regulator);
+ pm_runtime_get_sync(&dev->pdev->dev);
+
+ clk_enable(dev->clk);
status = init_hw(dev);
if (status)
- return status;
+ goto out;
- clk_enable(dev->clk);
+ /* Attempt three times to send the message queue */
+ for (j = 0; j < 3; j++) {
+ /* setup the i2c controller */
+ setup_i2c_controller(dev);
- /* setup the i2c controller */
- setup_i2c_controller(dev);
+ for (i = 0; i < num_msgs; i++) {
+ if (unlikely(msgs[i].flags & I2C_M_TEN)) {
+ dev_err(&dev->pdev->dev, "10 bit addressing"
+ "not supported\n");
- for (i = 0; i < num_msgs; i++) {
- if (unlikely(msgs[i].flags & I2C_M_TEN)) {
- dev_err(&dev->pdev->dev, "10 bit addressing"
- "not supported\n");
- return -EINVAL;
- }
- dev->cli.slave_adr = msgs[i].addr;
- dev->cli.buffer = msgs[i].buf;
- dev->cli.count = msgs[i].len;
- dev->stop = (i < (num_msgs - 1)) ? 0 : 1;
- dev->result = 0;
-
- if (msgs[i].flags & I2C_M_RD) {
- /* it is a read operation */
- dev->cli.operation = I2C_READ;
- status = read_i2c(dev);
- } else {
- /* write operation */
- dev->cli.operation = I2C_WRITE;
- status = write_i2c(dev);
- }
- if (status || (dev->result)) {
- /* get the abort cause */
- cause = (readl(dev->virtbase + I2C_SR) >> 4) & 0x7;
- dev_err(&dev->pdev->dev, "error during I2C"
- "message xfer: %d\n", cause);
- dev_err(&dev->pdev->dev, "%s\n",
- cause >= ARRAY_SIZE(abort_causes)
- ? "unknown reason" : abort_causes[cause]);
- clk_disable(dev->clk);
- return status;
+ status = -EINVAL;
+ goto out;
+ }
+ dev->cli.slave_adr = msgs[i].addr;
+ dev->cli.buffer = msgs[i].buf;
+ dev->cli.count = msgs[i].len;
+ dev->stop = (i < (num_msgs - 1)) ? 0 : 1;
+ dev->result = 0;
+
+ status = nmk_i2c_xfer_one(dev, msgs[i].flags);
+ if (status != 0)
+ break;
}
- udelay(I2C_DELAY);
+ if (status == 0)
+ break;
}
+
+out:
clk_disable(dev->clk);
+ pm_runtime_put_sync(&dev->pdev->dev);
+ if (dev->regulator)
+ regulator_disable(dev->regulator);
+
+ dev->busy = false;
/* return the no. messages processed */
if (status)
@@ -666,17 +730,7 @@ static irqreturn_t i2c_irq_handler(int irq, void *arg)
*/
disable_interrupts(dev, I2C_IT_TXFNE);
} else {
- for (count = (MAX_I2C_FIFO_THRESHOLD - tft - 2);
- (count > 0) &&
- (dev->cli.count != 0);
- count--) {
- /* write to the Tx FIFO */
- writeb(*dev->cli.buffer,
- dev->virtbase + I2C_TFR);
- dev->cli.buffer++;
- dev->cli.count--;
- dev->cli.xfer_bytes++;
- }
+ fill_tx_fifo(dev, (MAX_I2C_FIFO_THRESHOLD - tft));
/*
* if done, close the transfer by disabling the
* corresponding TXFNE interrupt
@@ -729,16 +783,11 @@ static irqreturn_t i2c_irq_handler(int irq, void *arg)
}
}
- i2c_set_bit(dev->virtbase + I2C_ICR, I2C_IT_MTD);
- i2c_set_bit(dev->virtbase + I2C_ICR, I2C_IT_MTDWS);
-
- disable_interrupts(dev,
- (I2C_IT_TXFNE | I2C_IT_TXFE | I2C_IT_TXFF
- | I2C_IT_TXFOVR | I2C_IT_RXFNF
- | I2C_IT_RXFF | I2C_IT_RXFE));
+ disable_all_interrupts(dev);
+ clear_all_interrupts(dev);
if (dev->cli.count) {
- dev->result = -1;
+ dev->result = -EIO;
dev_err(&dev->pdev->dev, "%lu bytes still remain to be"
"xfered\n", dev->cli.count);
(void) init_hw(dev);
@@ -749,7 +798,7 @@ static irqreturn_t i2c_irq_handler(int irq, void *arg)
/* Master Arbitration lost interrupt */
case I2C_IT_MAL:
- dev->result = -1;
+ dev->result = -EIO;
(void) init_hw(dev);
i2c_set_bit(dev->virtbase + I2C_ICR, I2C_IT_MAL);
@@ -763,7 +812,7 @@ static irqreturn_t i2c_irq_handler(int irq, void *arg)
* during the transaction.
*/
case I2C_IT_BERR:
- dev->result = -1;
+ dev->result = -EIO;
/* get the status */
if (((readl(dev->virtbase + I2C_SR) >> 2) & 0x3) == I2C_ABORT)
(void) init_hw(dev);
@@ -779,7 +828,7 @@ static irqreturn_t i2c_irq_handler(int irq, void *arg)
* the Tx FIFO is full.
*/
case I2C_IT_TXFOVR:
- dev->result = -1;
+ dev->result = -EIO;
(void) init_hw(dev);
dev_err(&dev->pdev->dev, "Tx Fifo Over run\n");
@@ -805,6 +854,38 @@ static irqreturn_t i2c_irq_handler(int irq, void *arg)
return IRQ_HANDLED;
}
+
+#ifdef CONFIG_PM
+static int nmk_i2c_suspend(struct device *dev)
+{
+ struct platform_device *pdev = to_platform_device(dev);
+ struct nmk_i2c_dev *nmk_i2c = platform_get_drvdata(pdev);
+
+ if (nmk_i2c->busy)
+ return -EBUSY;
+
+ return 0;
+}
+
+static int nmk_i2c_resume(struct device *dev)
+{
+ return 0;
+}
+#else
+#define nmk_i2c_suspend NULL
+#define nmk_i2c_resume NULL
+#endif
+
+/*
+ * We use noirq so that we suspend late and resume before the wakeup interrupt
+ * to ensure that we do the !pm_runtime_suspended() check in resume before
+ * there has been a regular pm runtime resume (via pm_runtime_get_sync()).
+ */
+static const struct dev_pm_ops nmk_i2c_pm = {
+ .suspend_noirq = nmk_i2c_suspend,
+ .resume_noirq = nmk_i2c_resume,
+};
+
static unsigned int nmk_i2c_functionality(struct i2c_adapter *adap)
{
return I2C_FUNC_I2C | I2C_FUNC_SMBUS_EMUL;
@@ -830,7 +911,7 @@ static int __devinit nmk_i2c_probe(struct platform_device *pdev)
ret = -ENOMEM;
goto err_no_mem;
}
-
+ dev->busy = false;
dev->pdev = pdev;
platform_set_drvdata(pdev, dev);
@@ -860,6 +941,15 @@ static int __devinit nmk_i2c_probe(struct platform_device *pdev)
goto err_irq;
}
+ dev->regulator = regulator_get(&pdev->dev, "v-i2c");
+ if (IS_ERR(dev->regulator)) {
+ dev_warn(&pdev->dev, "could not get i2c regulator\n");
+ dev->regulator = NULL;
+ }
+
+ pm_suspend_ignore_children(&pdev->dev, true);
+ pm_runtime_enable(&pdev->dev);
+
dev->clk = clk_get(&pdev->dev, NULL);
if (IS_ERR(dev->clk)) {
dev_err(&pdev->dev, "could not get i2c clock\n");
@@ -872,6 +962,8 @@ static int __devinit nmk_i2c_probe(struct platform_device *pdev)
adap->owner = THIS_MODULE;
adap->class = I2C_CLASS_HWMON | I2C_CLASS_SPD;
adap->algo = &nmk_i2c_algo;
+ adap->timeout = pdata->timeout ? msecs_to_jiffies(pdata->timeout) :
+ msecs_to_jiffies(20000);
snprintf(adap->name, sizeof(adap->name),
"Nomadik I2C%d at %lx", pdev->id, (unsigned long)res->start);
@@ -887,12 +979,6 @@ static int __devinit nmk_i2c_probe(struct platform_device *pdev)
i2c_set_adapdata(adap, dev);
- ret = init_hw(dev);
- if (ret != 0) {
- dev_err(&pdev->dev, "error in initializing i2c hardware\n");
- goto err_init_hw;
- }
-
dev_info(&pdev->dev, "initialize %s on virtual "
"base %p\n", adap->name, dev->virtbase);
@@ -904,10 +990,12 @@ static int __devinit nmk_i2c_probe(struct platform_device *pdev)
return 0;
- err_init_hw:
err_add_adap:
clk_put(dev->clk);
err_no_clk:
+ if (dev->regulator)
+ regulator_put(dev->regulator);
+ pm_runtime_disable(&pdev->dev);
free_irq(dev->irq, dev);
err_irq:
iounmap(dev->virtbase);
@@ -938,6 +1026,9 @@ static int __devexit nmk_i2c_remove(struct platform_device *pdev)
if (res)
release_mem_region(res->start, resource_size(res));
clk_put(dev->clk);
+ if (dev->regulator)
+ regulator_put(dev->regulator);
+ pm_runtime_disable(&pdev->dev);
platform_set_drvdata(pdev, NULL);
kfree(dev);
@@ -948,6 +1039,7 @@ static struct platform_driver nmk_i2c_driver = {
.driver = {
.owner = THIS_MODULE,
.name = DRIVER_NAME,
+ .pm = &nmk_i2c_pm,
},
.probe = nmk_i2c_probe,
.remove = __devexit_p(nmk_i2c_remove),
diff --git a/drivers/i2c/busses/i2c-parport-light.c b/drivers/i2c/busses/i2c-parport-light.c
index fc5fbd1012c9..4b95f7a63a3b 100644
--- a/drivers/i2c/busses/i2c-parport-light.c
+++ b/drivers/i2c/busses/i2c-parport-light.c
@@ -2,13 +2,13 @@
* i2c-parport-light.c I2C bus over parallel port *
* ------------------------------------------------------------------------ *
Copyright (C) 2003-2010 Jean Delvare <khali@linux-fr.org>
-
+
Based on older i2c-velleman.c driver
Copyright (C) 1995-2000 Simon G. Vogl
With some changes from:
Frodo Looijaard <frodol@dds.nl>
Kyösti Mälkki <kmalkki@cc.hut.fi>
-
+
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
@@ -114,7 +114,7 @@ static struct i2c_algo_bit_data parport_algo_data = {
.getscl = parport_getscl,
.udelay = 50,
.timeout = HZ,
-};
+};
/* ----- Driver registration ---------------------------------------------- */
@@ -132,7 +132,7 @@ static struct i2c_smbus_alert_setup alert_data = {
static struct i2c_client *ara;
static struct lineop parport_ctrl_irq = {
.val = (1 << 4),
- .port = CTRL,
+ .port = PORT_CTRL,
};
static int __devinit i2c_parport_probe(struct platform_device *pdev)
@@ -245,7 +245,7 @@ static int __init i2c_parport_init(void)
if (irq != 0)
pr_info(DRVNAME ": using irq %d\n", irq);
- if (!adapter_parm[type].getscl.val)
+ if (!adapter_parm[type].getscl.val)
parport_algo_data.getscl = NULL;
/* Sets global pdev as a side effect */
diff --git a/drivers/i2c/busses/i2c-parport.c b/drivers/i2c/busses/i2c-parport.c
index 2dbba163b102..24565687ac9b 100644
--- a/drivers/i2c/busses/i2c-parport.c
+++ b/drivers/i2c/busses/i2c-parport.c
@@ -2,13 +2,13 @@
* i2c-parport.c I2C bus over parallel port *
* ------------------------------------------------------------------------ *
Copyright (C) 2003-2011 Jean Delvare <khali@linux-fr.org>
-
+
Based on older i2c-philips-par.c driver
Copyright (C) 1995-2000 Simon G. Vogl
With some changes from:
Frodo Looijaard <frodol@dds.nl>
Kyösti Mälkki <kmalkki@cc.hut.fi>
-
+
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
@@ -78,13 +78,13 @@ static unsigned char port_read_control(struct parport *p)
return parport_read_control(p);
}
-static void (*port_write[])(struct parport *, unsigned char) = {
+static void (* const port_write[])(struct parport *, unsigned char) = {
port_write_data,
NULL,
port_write_control,
};
-static unsigned char (*port_read[])(struct parport *) = {
+static unsigned char (* const port_read[])(struct parport *) = {
port_read_data,
port_read_status,
port_read_control,
@@ -147,7 +147,7 @@ static const struct i2c_algo_bit_data parport_algo_data = {
.getscl = parport_getscl,
.udelay = 10, /* ~50 kbps */
.timeout = HZ,
-};
+};
/* ----- I2c and parallel port call-back functions and structures --------- */
@@ -164,10 +164,10 @@ void i2c_parport_irq(void *data)
"SMBus alert received but no ARA client!\n");
}
-static void i2c_parport_attach (struct parport *port)
+static void i2c_parport_attach(struct parport *port)
{
struct i2c_par *adapter;
-
+
adapter = kzalloc(sizeof(struct i2c_par), GFP_KERNEL);
if (adapter == NULL) {
printk(KERN_ERR "i2c-parport: Failed to kzalloc\n");
@@ -180,7 +180,7 @@ static void i2c_parport_attach (struct parport *port)
NULL, NULL, i2c_parport_irq, PARPORT_FLAG_EXCL, adapter);
if (!adapter->pdev) {
printk(KERN_ERR "i2c-parport: Unable to register with parport\n");
- goto ERROR0;
+ goto err_free;
}
/* Fill the rest of the structure */
@@ -200,7 +200,7 @@ static void i2c_parport_attach (struct parport *port)
if (parport_claim_or_block(adapter->pdev) < 0) {
printk(KERN_ERR "i2c-parport: Could not claim parallel port\n");
- goto ERROR1;
+ goto err_unregister;
}
/* Reset hardware to a sane state (SCL and SDA high) */
@@ -215,7 +215,7 @@ static void i2c_parport_attach (struct parport *port)
if (i2c_bit_add_bus(&adapter->adapter) < 0) {
printk(KERN_ERR "i2c-parport: Unable to register with I2C\n");
- goto ERROR1;
+ goto err_unregister;
}
/* Setup SMBus alert if supported */
@@ -234,16 +234,16 @@ static void i2c_parport_attach (struct parport *port)
mutex_lock(&adapter_list_lock);
list_add_tail(&adapter->node, &adapter_list);
mutex_unlock(&adapter_list_lock);
- return;
+ return;
-ERROR1:
+ err_unregister:
parport_release(adapter->pdev);
parport_unregister_device(adapter->pdev);
-ERROR0:
+ err_free:
kfree(adapter);
}
-static void i2c_parport_detach (struct parport *port)
+static void i2c_parport_detach(struct parport *port)
{
struct i2c_par *adapter, *_n;
@@ -260,7 +260,7 @@ static void i2c_parport_detach (struct parport *port)
/* Un-init if needed (power off...) */
if (adapter_parm[type].init.val)
line_set(port, 0, &adapter_parm[type].init);
-
+
parport_release(adapter->pdev);
parport_unregister_device(adapter->pdev);
list_del(&adapter->node);
diff --git a/drivers/i2c/busses/i2c-parport.h b/drivers/i2c/busses/i2c-parport.h
index a9f66816546c..3fe652302ea7 100644
--- a/drivers/i2c/busses/i2c-parport.h
+++ b/drivers/i2c/busses/i2c-parport.h
@@ -2,7 +2,7 @@
* i2c-parport.h I2C bus over parallel port *
* ------------------------------------------------------------------------ *
Copyright (C) 2003-2010 Jean Delvare <khali@linux-fr.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; either version 2 of the License, or
@@ -18,13 +18,9 @@
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
* ------------------------------------------------------------------------ */
-#ifdef DATA
-#undef DATA
-#endif
-
-#define DATA 0
-#define STAT 1
-#define CTRL 2
+#define PORT_DATA 0
+#define PORT_STAT 1
+#define PORT_CTRL 2
struct lineop {
u8 val;
@@ -41,61 +37,61 @@ struct adapter_parm {
unsigned int smbus_alert:1;
};
-static struct adapter_parm adapter_parm[] = {
+static const struct adapter_parm adapter_parm[] = {
/* type 0: Philips adapter */
{
- .setsda = { 0x80, DATA, 1 },
- .setscl = { 0x08, CTRL, 0 },
- .getsda = { 0x80, STAT, 0 },
- .getscl = { 0x08, STAT, 0 },
+ .setsda = { 0x80, PORT_DATA, 1 },
+ .setscl = { 0x08, PORT_CTRL, 0 },
+ .getsda = { 0x80, PORT_STAT, 0 },
+ .getscl = { 0x08, PORT_STAT, 0 },
},
/* type 1: home brew teletext adapter */
{
- .setsda = { 0x02, DATA, 0 },
- .setscl = { 0x01, DATA, 0 },
- .getsda = { 0x80, STAT, 1 },
+ .setsda = { 0x02, PORT_DATA, 0 },
+ .setscl = { 0x01, PORT_DATA, 0 },
+ .getsda = { 0x80, PORT_STAT, 1 },
},
/* type 2: Velleman K8000 adapter */
{
- .setsda = { 0x02, CTRL, 1 },
- .setscl = { 0x08, CTRL, 1 },
- .getsda = { 0x10, STAT, 0 },
+ .setsda = { 0x02, PORT_CTRL, 1 },
+ .setscl = { 0x08, PORT_CTRL, 1 },
+ .getsda = { 0x10, PORT_STAT, 0 },
},
/* type 3: ELV adapter */
{
- .setsda = { 0x02, DATA, 1 },
- .setscl = { 0x01, DATA, 1 },
- .getsda = { 0x40, STAT, 1 },
- .getscl = { 0x08, STAT, 1 },
+ .setsda = { 0x02, PORT_DATA, 1 },
+ .setscl = { 0x01, PORT_DATA, 1 },
+ .getsda = { 0x40, PORT_STAT, 1 },
+ .getscl = { 0x08, PORT_STAT, 1 },
},
/* type 4: ADM1032 evaluation board */
{
- .setsda = { 0x02, DATA, 1 },
- .setscl = { 0x01, DATA, 1 },
- .getsda = { 0x10, STAT, 1 },
- .init = { 0xf0, DATA, 0 },
+ .setsda = { 0x02, PORT_DATA, 1 },
+ .setscl = { 0x01, PORT_DATA, 1 },
+ .getsda = { 0x10, PORT_STAT, 1 },
+ .init = { 0xf0, PORT_DATA, 0 },
.smbus_alert = 1,
},
/* type 5: ADM1025, ADM1030 and ADM1031 evaluation boards */
{
- .setsda = { 0x02, DATA, 1 },
- .setscl = { 0x01, DATA, 1 },
- .getsda = { 0x10, STAT, 1 },
+ .setsda = { 0x02, PORT_DATA, 1 },
+ .setscl = { 0x01, PORT_DATA, 1 },
+ .getsda = { 0x10, PORT_STAT, 1 },
},
/* type 6: Barco LPT->DVI (K5800236) adapter */
{
- .setsda = { 0x02, DATA, 1 },
- .setscl = { 0x01, DATA, 1 },
- .getsda = { 0x20, STAT, 0 },
- .getscl = { 0x40, STAT, 0 },
- .init = { 0xfc, DATA, 0 },
+ .setsda = { 0x02, PORT_DATA, 1 },
+ .setscl = { 0x01, PORT_DATA, 1 },
+ .getsda = { 0x20, PORT_STAT, 0 },
+ .getscl = { 0x40, PORT_STAT, 0 },
+ .init = { 0xfc, PORT_DATA, 0 },
},
/* type 7: One For All JP1 parallel port adapter */
{
- .setsda = { 0x01, DATA, 0 },
- .setscl = { 0x02, DATA, 0 },
- .getsda = { 0x80, STAT, 1 },
- .init = { 0x04, DATA, 1 },
+ .setsda = { 0x01, PORT_DATA, 0 },
+ .setscl = { 0x02, PORT_DATA, 0 },
+ .getsda = { 0x80, PORT_STAT, 1 },
+ .init = { 0x04, PORT_DATA, 1 },
},
};
diff --git a/drivers/i2c/busses/i2c-sh_mobile.c b/drivers/i2c/busses/i2c-sh_mobile.c
index 2707f5e17158..f633a53b6dbe 100644
--- a/drivers/i2c/busses/i2c-sh_mobile.c
+++ b/drivers/i2c/busses/i2c-sh_mobile.c
@@ -32,6 +32,7 @@
#include <linux/clk.h>
#include <linux/io.h>
#include <linux/slab.h>
+#include <linux/i2c/i2c-sh_mobile.h>
/* Transmit operation: */
/* */
@@ -117,7 +118,7 @@ struct sh_mobile_i2c_data {
struct device *dev;
void __iomem *reg;
struct i2c_adapter adap;
-
+ unsigned long bus_speed;
struct clk *clk;
u_int8_t icic;
u_int8_t iccl;
@@ -205,7 +206,7 @@ static void activate_ch(struct sh_mobile_i2c_data *pd)
* We also round off the result.
*/
num = i2c_clk * 5;
- denom = NORMAL_SPEED * 9;
+ denom = pd->bus_speed * 9;
tmp = num * 10 / denom;
if (tmp % 10 >= 5)
pd->iccl = (u_int8_t)((num/denom) + 1);
@@ -574,10 +575,10 @@ static int sh_mobile_i2c_hook_irqs(struct platform_device *dev, int hook)
static int sh_mobile_i2c_probe(struct platform_device *dev)
{
+ struct i2c_sh_mobile_platform_data *pdata = dev->dev.platform_data;
struct sh_mobile_i2c_data *pd;
struct i2c_adapter *adap;
struct resource *res;
- char clk_name[8];
int size;
int ret;
@@ -587,10 +588,9 @@ static int sh_mobile_i2c_probe(struct platform_device *dev)
return -ENOMEM;
}
- snprintf(clk_name, sizeof(clk_name), "i2c%d", dev->id);
- pd->clk = clk_get(&dev->dev, clk_name);
+ pd->clk = clk_get(&dev->dev, NULL);
if (IS_ERR(pd->clk)) {
- dev_err(&dev->dev, "cannot get clock \"%s\"\n", clk_name);
+ dev_err(&dev->dev, "cannot get clock\n");
ret = PTR_ERR(pd->clk);
goto err;
}
@@ -620,6 +620,11 @@ static int sh_mobile_i2c_probe(struct platform_device *dev)
goto err_irq;
}
+ /* Use platformd data bus speed or NORMAL_SPEED */
+ pd->bus_speed = NORMAL_SPEED;
+ if (pdata && pdata->bus_speed)
+ pd->bus_speed = pdata->bus_speed;
+
/* The IIC blocks on SH-Mobile ARM processors
* come with two new bits in ICIC.
*/
@@ -660,6 +665,8 @@ static int sh_mobile_i2c_probe(struct platform_device *dev)
goto err_all;
}
+ dev_info(&dev->dev, "I2C adapter %d with bus speed %lu Hz\n",
+ adap->nr, pd->bus_speed);
return 0;
err_all:
@@ -729,3 +736,4 @@ module_exit(sh_mobile_i2c_adap_exit);
MODULE_DESCRIPTION("SuperH Mobile I2C Bus Controller driver");
MODULE_AUTHOR("Magnus Damm");
MODULE_LICENSE("GPL v2");
+MODULE_ALIAS("platform:i2c-sh_mobile");
diff --git a/drivers/i2c/busses/i2c-tegra.c b/drivers/i2c/busses/i2c-tegra.c
index b4ab39b741eb..4d9319665e32 100644
--- a/drivers/i2c/busses/i2c-tegra.c
+++ b/drivers/i2c/busses/i2c-tegra.c
@@ -35,8 +35,10 @@
#define BYTES_PER_FIFO_WORD 4
#define I2C_CNFG 0x000
+#define I2C_CNFG_DEBOUNCE_CNT_SHIFT 12
#define I2C_CNFG_PACKET_MODE_EN (1<<10)
#define I2C_CNFG_NEW_MASTER_FSM (1<<11)
+#define I2C_STATUS 0x01C
#define I2C_SL_CNFG 0x020
#define I2C_SL_CNFG_NEWSL (1<<2)
#define I2C_SL_ADDR1 0x02c
@@ -77,6 +79,7 @@
#define I2C_ERR_NONE 0x00
#define I2C_ERR_NO_ACK 0x01
#define I2C_ERR_ARBITRATION_LOST 0x02
+#define I2C_ERR_UNKNOWN_INTERRUPT 0x04
#define PACKET_HEADER0_HEADER_SIZE_SHIFT 28
#define PACKET_HEADER0_PACKET_ID_SHIFT 16
@@ -121,6 +124,7 @@ struct tegra_i2c_dev {
void __iomem *base;
int cont_id;
int irq;
+ bool irq_disabled;
int is_dvc;
struct completion msg_complete;
int msg_err;
@@ -325,11 +329,17 @@ static int tegra_i2c_init(struct tegra_i2c_dev *i2c_dev)
if (i2c_dev->is_dvc)
tegra_dvc_init(i2c_dev);
- val = I2C_CNFG_NEW_MASTER_FSM | I2C_CNFG_PACKET_MODE_EN;
+ val = I2C_CNFG_NEW_MASTER_FSM | I2C_CNFG_PACKET_MODE_EN |
+ (0x2 << I2C_CNFG_DEBOUNCE_CNT_SHIFT);
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);
+ if (!i2c_dev->is_dvc) {
+ u32 sl_cfg = i2c_readl(i2c_dev, I2C_SL_CNFG);
+ i2c_writel(i2c_dev, sl_cfg | I2C_SL_CNFG_NEWSL, I2C_SL_CNFG);
+ }
+
val = 7 << I2C_FIFO_CONTROL_TX_TRIG_SHIFT |
0 << I2C_FIFO_CONTROL_RX_TRIG_SHIFT;
i2c_writel(i2c_dev, val, I2C_FIFO_CONTROL);
@@ -338,6 +348,12 @@ static int tegra_i2c_init(struct tegra_i2c_dev *i2c_dev)
err = -ETIMEDOUT;
clk_disable(i2c_dev->clk);
+
+ if (i2c_dev->irq_disabled) {
+ i2c_dev->irq_disabled = 0;
+ enable_irq(i2c_dev->irq);
+ }
+
return err;
}
@@ -350,8 +366,19 @@ static irqreturn_t tegra_i2c_isr(int irq, void *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;
+ dev_warn(i2c_dev->dev, "irq status 0 %08x %08x %08x\n",
+ i2c_readl(i2c_dev, I2C_PACKET_TRANSFER_STATUS),
+ i2c_readl(i2c_dev, I2C_STATUS),
+ i2c_readl(i2c_dev, I2C_CNFG));
+ i2c_dev->msg_err |= I2C_ERR_UNKNOWN_INTERRUPT;
+
+ if (!i2c_dev->irq_disabled) {
+ disable_irq_nosync(i2c_dev->irq);
+ i2c_dev->irq_disabled = 1;
+ }
+
+ complete(&i2c_dev->msg_complete);
+ goto err;
}
if (unlikely(status & status_err)) {
@@ -391,6 +418,8 @@ err:
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);
+ if (i2c_dev->is_dvc)
+ dvc_writel(i2c_dev, DVC_STATUS_I2C_DONE_INTR, DVC_STATUS);
return IRQ_HANDLED;
}
@@ -424,12 +453,12 @@ static int tegra_i2c_xfer_msg(struct tegra_i2c_dev *i2c_dev,
packet_header = msg->addr << I2C_HEADER_SLAVE_ADDR_SHIFT;
packet_header |= I2C_HEADER_IE_ENABLE;
+ if (!stop)
+ packet_header |= I2C_HEADER_REPEAT_START;
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);
generated by cgit v1.2.3 (git 2.39.0) at 2024-11-02 09:23:34 +0300