gpio_set_value was replaced with gpio_set_value_cansleep in order
to allow GPIO access that may sleep. This is particularelly useful
when GPIO is accessed using busses like I2C, SPI, USB
Signed-off-by: Robert Dolca <[email protected]>
---
drivers/nfc/pn544/i2c.c | 20 ++++++++++----------
1 file changed, 10 insertions(+), 10 deletions(-)
diff --git a/drivers/nfc/pn544/i2c.c b/drivers/nfc/pn544/i2c.c
index fc02e8d..5f4b9c1 100644
--- a/drivers/nfc/pn544/i2c.c
+++ b/drivers/nfc/pn544/i2c.c
@@ -195,18 +195,18 @@ static void pn544_hci_i2c_platform_init(struct pn544_i2c_phy *phy)
nfc_info(&phy->i2c_dev->dev, "Detecting nfc_en polarity\n");
/* Disable fw download */
- gpio_set_value(phy->gpio_fw, 0);
+ gpio_set_value_cansleep(phy->gpio_fw, 0);
for (polarity = 0; polarity < 2; polarity++) {
phy->en_polarity = polarity;
retry = 3;
while (retry--) {
/* power off */
- gpio_set_value(phy->gpio_en, !phy->en_polarity);
+ gpio_set_value_cansleep(phy->gpio_en, !phy->en_polarity);
usleep_range(10000, 15000);
/* power on */
- gpio_set_value(phy->gpio_en, phy->en_polarity);
+ gpio_set_value_cansleep(phy->gpio_en, phy->en_polarity);
usleep_range(10000, 15000);
/* send reset */
@@ -225,13 +225,13 @@ static void pn544_hci_i2c_platform_init(struct pn544_i2c_phy *phy)
"Could not detect nfc_en polarity, fallback to active high\n");
out:
- gpio_set_value(phy->gpio_en, !phy->en_polarity);
+ gpio_set_value_cansleep(phy->gpio_en, !phy->en_polarity);
}
static void pn544_hci_i2c_enable_mode(struct pn544_i2c_phy *phy, int run_mode)
{
- gpio_set_value(phy->gpio_fw, run_mode == PN544_FW_MODE ? 1 : 0);
- gpio_set_value(phy->gpio_en, phy->en_polarity);
+ gpio_set_value_cansleep(phy->gpio_fw, run_mode == PN544_FW_MODE ? 1 : 0);
+ gpio_set_value_cansleep(phy->gpio_en, phy->en_polarity);
usleep_range(10000, 15000);
phy->run_mode = run_mode;
@@ -254,14 +254,14 @@ static void pn544_hci_i2c_disable(void *phy_id)
{
struct pn544_i2c_phy *phy = phy_id;
- gpio_set_value(phy->gpio_fw, 0);
- gpio_set_value(phy->gpio_en, !phy->en_polarity);
+ gpio_set_value_cansleep(phy->gpio_fw, 0);
+ gpio_set_value_cansleep(phy->gpio_en, !phy->en_polarity);
usleep_range(10000, 15000);
- gpio_set_value(phy->gpio_en, phy->en_polarity);
+ gpio_set_value_cansleep(phy->gpio_en, phy->en_polarity);
usleep_range(10000, 15000);
- gpio_set_value(phy->gpio_en, !phy->en_polarity);
+ gpio_set_value_cansleep(phy->gpio_en, !phy->en_polarity);
usleep_range(10000, 15000);
phy->powered = 0;
--
1.9.1
On Fri, Jan 9, 2015 at 2:02 PM, Robert Dolca <[email protected]> wrote:
> Device id: NXP5440
> Pin mapping:
> - 0 IRQ pin
> - 1 enable pin
> - 2 firmware pin
>
> Signed-off-by: Robert Dolca <[email protected]>
> ---
> drivers/nfc/Kconfig | 1 +
> drivers/nfc/pn544/i2c.c | 115 ++++++++++++++++++++++++++++++++++++++++++++++--
> net/nfc/core.c | 1 +
> 3 files changed, 114 insertions(+), 3 deletions(-)
>
> diff --git a/drivers/nfc/Kconfig b/drivers/nfc/Kconfig
> index 7929fac..a25e712 100644
> --- a/drivers/nfc/Kconfig
> +++ b/drivers/nfc/Kconfig
> @@ -68,6 +68,7 @@ config NFC_PORT100
>
> If unsure, say N.
>
> +source "drivers/nfc/pn547/Kconfig"
I think this line shouldn't be here :).
> source "drivers/nfc/pn544/Kconfig"
> source "drivers/nfc/microread/Kconfig"
> source "drivers/nfc/nfcmrvl/Kconfig"
> diff --git a/drivers/nfc/pn544/i2c.c b/drivers/nfc/pn544/i2c.c
> index 5f4b9c1..58b9029 100644
> --- a/drivers/nfc/pn544/i2c.c
> +++ b/drivers/nfc/pn544/i2c.c
> @@ -24,6 +24,7 @@
> #include <linux/gpio.h>
> #include <linux/of_gpio.h>
> #include <linux/of_irq.h>
> +#include <linux/acpi.h>
> #include <linux/miscdevice.h>
> #include <linux/interrupt.h>
> #include <linux/delay.h>
> @@ -41,6 +42,11 @@
> #define PN544_I2C_FRAME_HEADROOM 1
> #define PN544_I2C_FRAME_TAILROOM 2
>
> +/* GPIO names */
> +#define PN544_GPIO_NAME_IRQ "pn544_irq"
> +#define PN544_GPIO_NAME_FW "pn544_fw"
> +#define PN544_GPIO_NAME_EN "pn544_en"
> +
> /* framing in HCI mode */
> #define PN544_HCI_I2C_LLC_LEN 1
> #define PN544_HCI_I2C_LLC_CRC 2
> @@ -58,6 +64,13 @@ static struct i2c_device_id pn544_hci_i2c_id_table[] = {
>
> MODULE_DEVICE_TABLE(i2c, pn544_hci_i2c_id_table);
>
> +static const struct acpi_device_id pn544_hci_i2c_acpi_match[] = {
> + {"NXP5440", 0},
> + {}
> +};
> +
> +MODULE_DEVICE_TABLE(acpi, pn544_hci_i2c_acpi_match);
> +
> #define PN544_HCI_I2C_DRIVER_NAME "pn544_hci_i2c"
>
> /*
> @@ -859,6 +872,90 @@ exit_state_wait_secure_write_answer:
> }
> }
>
> +static int pn544_hci_i2c_acpi_request_resources(struct i2c_client *client)
> +{
> + struct pn544_i2c_phy *phy = i2c_get_clientdata(client);
> + const struct acpi_device_id *id;
> + struct gpio_desc *gpiod_en, *gpiod_irq, *gpiod_fw;
> + struct device *dev;
> + int ret;
> +
> + if (!client)
> + return -EINVAL;
> +
> + dev = &client->dev;
> +
> + /* Match the struct device against a given list of ACPI IDs */
> + id = acpi_match_device(dev->driver->acpi_match_table, dev);
> +
> + if (!id)
> + return -ENODEV;
> +
> + /* Get EN GPIO from ACPI */
> + gpiod_en = devm_gpiod_get_index(dev, PN544_GPIO_NAME_EN, 1);
> + if (IS_ERR(gpiod_en)) {
> + nfc_err(dev,
> + "Unable to get EN GPIO\n");
> + return -ENODEV;
> + }
> +
> + phy->gpio_en = desc_to_gpio(gpiod_en);
> +
> + /* Configuration EN GPIO */
> + ret = gpiod_direction_output(gpiod_en, 0);
> + if (ret) {
> + nfc_err(dev, "Fail EN pin direction\n");
> + return ret;
> + }
> +
> + /* Get FW GPIO from ACPI */
> + gpiod_fw = devm_gpiod_get_index(dev, PN544_GPIO_NAME_FW, 2);
> + if (IS_ERR(gpiod_fw)) {
> + nfc_err(dev,
> + "Unable to get FW GPIO\n");
> + return -ENODEV;
> + }
> +
> + phy->gpio_fw = desc_to_gpio(gpiod_fw);
> +
> + /* Configuration FW GPIO */
> + ret = gpiod_direction_output(gpiod_fw, 0);
> + if (ret) {
> + nfc_err(dev, "Fail FW pin direction\n");
> + return ret;
> + }
> +
> + /* Get IRQ GPIO */
> + gpiod_irq = devm_gpiod_get_index(dev, PN544_GPIO_NAME_IRQ, 0);
> + if (IS_ERR(gpiod_irq)) {
> + nfc_err(dev,
> + "Unable to get IRQ GPIO\n");
> + return -ENODEV;
> + }
> +
> + phy->gpio_irq = desc_to_gpio(gpiod_irq);
> +
> + /* Configure IRQ GPIO */
> + ret = gpiod_direction_input(gpiod_irq);
> + if (ret) {
> + nfc_err(dev, "Fail IRQ pin direction\n");
> + return ret;
> + }
> +
> + /* Map the pin to an IRQ */
> + ret = gpiod_to_irq(gpiod_irq);
> + if (ret < 0) {
> + nfc_err(dev, "Fail pin IRQ mapping\n");
> + return ret;
> + }
> +
> + nfc_info(dev, "GPIO resource, no:%d irq:%d\n",
> + desc_to_gpio(gpiod_irq), ret);
> + client->irq = ret;
> +
> + return 0;
> +}
> +
> #ifdef CONFIG_OF
>
> static int pn544_hci_i2c_of_request_resources(struct i2c_client *client)
> @@ -884,7 +981,7 @@ static int pn544_hci_i2c_of_request_resources(struct i2c_client *client)
> phy->gpio_en = ret;
>
> /* Configuration of EN GPIO */
> - ret = gpio_request(phy->gpio_en, "pn544_en");
> + ret = gpio_request(phy->gpio_en, PN544_GPIO_NAME_EN);
> if (ret) {
> nfc_err(&client->dev, "Fail EN pin\n");
> goto err_dt;
> @@ -906,7 +1003,7 @@ static int pn544_hci_i2c_of_request_resources(struct i2c_client *client)
> phy->gpio_fw = ret;
>
> /* Configuration of FW GPIO */
> - ret = gpio_request(phy->gpio_fw, "pn544_fw");
> + ret = gpio_request(phy->gpio_fw, PN544_GPIO_NAME_FW);
> if (ret) {
> nfc_err(&client->dev, "Fail FW pin\n");
> goto err_gpio_en;
> @@ -1001,6 +1098,14 @@ static int pn544_hci_i2c_probe(struct i2c_client *client,
> phy->gpio_en = pdata->get_gpio(NFC_GPIO_ENABLE);
> phy->gpio_fw = pdata->get_gpio(NFC_GPIO_FW_RESET);
> phy->gpio_irq = pdata->get_gpio(NFC_GPIO_IRQ);
> + /* Using ACPI */
> + } else if (ACPI_HANDLE(&client->dev)) {
> + r = pn544_hci_i2c_acpi_request_resources(client);
> + if (r) {
> + nfc_err(&client->dev,
> + "Cannot get ACPI data\n");
> + return r;
> + }
> } else {
> nfc_err(&client->dev, "No platform data\n");
> return -EINVAL;
> @@ -1020,9 +1125,12 @@ static int pn544_hci_i2c_probe(struct i2c_client *client,
> PN544_I2C_FRAME_HEADROOM, PN544_I2C_FRAME_TAILROOM,
> PN544_HCI_I2C_LLC_MAX_PAYLOAD,
> pn544_hci_i2c_fw_download, &phy->hdev);
> - if (r < 0)
> + if (r < 0) {
> + nfc_err(&client->dev, "HCI Probing error\n");
> goto err_hci;
> + }
>
> + nfc_info(&client->dev, "NFC I2C driver loaded\n");
> return 0;
>
> err_hci:
> @@ -1080,6 +1188,7 @@ static struct i2c_driver pn544_hci_i2c_driver = {
> .name = PN544_HCI_I2C_DRIVER_NAME,
> .owner = THIS_MODULE,
> .of_match_table = of_match_ptr(of_pn544_i2c_match),
> + .acpi_match_table = ACPI_PTR(pn544_hci_i2c_acpi_match),
> },
> .probe = pn544_hci_i2c_probe,
> .id_table = pn544_hci_i2c_id_table,
> diff --git a/net/nfc/core.c b/net/nfc/core.c
> index 819b877..a53c2cc 100644
> --- a/net/nfc/core.c
> +++ b/net/nfc/core.c
> @@ -32,6 +32,7 @@
>
> #include "nfc.h"
>
> +#define DEBUG
> #define VERSION "0.1"
>
> #define NFC_CHECK_PRES_FREQ_MS 2000
> --
> 1.9.1
>
> --
> To unsubscribe from this list: send the line "unsubscribe netdev" in
> the body of a message to [email protected]
> More majordomo info at http://vger.kernel.org/majordomo-info.html
Device id: NXP5440
Pin mapping:
- 0 IRQ pin
- 1 enable pin
- 2 firmware pin
Signed-off-by: Robert Dolca <[email protected]>
---
drivers/nfc/Kconfig | 1 +
drivers/nfc/pn544/i2c.c | 115 ++++++++++++++++++++++++++++++++++++++++++++++--
net/nfc/core.c | 1 +
3 files changed, 114 insertions(+), 3 deletions(-)
diff --git a/drivers/nfc/Kconfig b/drivers/nfc/Kconfig
index 7929fac..a25e712 100644
--- a/drivers/nfc/Kconfig
+++ b/drivers/nfc/Kconfig
@@ -68,6 +68,7 @@ config NFC_PORT100
If unsure, say N.
+source "drivers/nfc/pn547/Kconfig"
source "drivers/nfc/pn544/Kconfig"
source "drivers/nfc/microread/Kconfig"
source "drivers/nfc/nfcmrvl/Kconfig"
diff --git a/drivers/nfc/pn544/i2c.c b/drivers/nfc/pn544/i2c.c
index 5f4b9c1..58b9029 100644
--- a/drivers/nfc/pn544/i2c.c
+++ b/drivers/nfc/pn544/i2c.c
@@ -24,6 +24,7 @@
#include <linux/gpio.h>
#include <linux/of_gpio.h>
#include <linux/of_irq.h>
+#include <linux/acpi.h>
#include <linux/miscdevice.h>
#include <linux/interrupt.h>
#include <linux/delay.h>
@@ -41,6 +42,11 @@
#define PN544_I2C_FRAME_HEADROOM 1
#define PN544_I2C_FRAME_TAILROOM 2
+/* GPIO names */
+#define PN544_GPIO_NAME_IRQ "pn544_irq"
+#define PN544_GPIO_NAME_FW "pn544_fw"
+#define PN544_GPIO_NAME_EN "pn544_en"
+
/* framing in HCI mode */
#define PN544_HCI_I2C_LLC_LEN 1
#define PN544_HCI_I2C_LLC_CRC 2
@@ -58,6 +64,13 @@ static struct i2c_device_id pn544_hci_i2c_id_table[] = {
MODULE_DEVICE_TABLE(i2c, pn544_hci_i2c_id_table);
+static const struct acpi_device_id pn544_hci_i2c_acpi_match[] = {
+ {"NXP5440", 0},
+ {}
+};
+
+MODULE_DEVICE_TABLE(acpi, pn544_hci_i2c_acpi_match);
+
#define PN544_HCI_I2C_DRIVER_NAME "pn544_hci_i2c"
/*
@@ -859,6 +872,90 @@ exit_state_wait_secure_write_answer:
}
}
+static int pn544_hci_i2c_acpi_request_resources(struct i2c_client *client)
+{
+ struct pn544_i2c_phy *phy = i2c_get_clientdata(client);
+ const struct acpi_device_id *id;
+ struct gpio_desc *gpiod_en, *gpiod_irq, *gpiod_fw;
+ struct device *dev;
+ int ret;
+
+ if (!client)
+ return -EINVAL;
+
+ dev = &client->dev;
+
+ /* Match the struct device against a given list of ACPI IDs */
+ id = acpi_match_device(dev->driver->acpi_match_table, dev);
+
+ if (!id)
+ return -ENODEV;
+
+ /* Get EN GPIO from ACPI */
+ gpiod_en = devm_gpiod_get_index(dev, PN544_GPIO_NAME_EN, 1);
+ if (IS_ERR(gpiod_en)) {
+ nfc_err(dev,
+ "Unable to get EN GPIO\n");
+ return -ENODEV;
+ }
+
+ phy->gpio_en = desc_to_gpio(gpiod_en);
+
+ /* Configuration EN GPIO */
+ ret = gpiod_direction_output(gpiod_en, 0);
+ if (ret) {
+ nfc_err(dev, "Fail EN pin direction\n");
+ return ret;
+ }
+
+ /* Get FW GPIO from ACPI */
+ gpiod_fw = devm_gpiod_get_index(dev, PN544_GPIO_NAME_FW, 2);
+ if (IS_ERR(gpiod_fw)) {
+ nfc_err(dev,
+ "Unable to get FW GPIO\n");
+ return -ENODEV;
+ }
+
+ phy->gpio_fw = desc_to_gpio(gpiod_fw);
+
+ /* Configuration FW GPIO */
+ ret = gpiod_direction_output(gpiod_fw, 0);
+ if (ret) {
+ nfc_err(dev, "Fail FW pin direction\n");
+ return ret;
+ }
+
+ /* Get IRQ GPIO */
+ gpiod_irq = devm_gpiod_get_index(dev, PN544_GPIO_NAME_IRQ, 0);
+ if (IS_ERR(gpiod_irq)) {
+ nfc_err(dev,
+ "Unable to get IRQ GPIO\n");
+ return -ENODEV;
+ }
+
+ phy->gpio_irq = desc_to_gpio(gpiod_irq);
+
+ /* Configure IRQ GPIO */
+ ret = gpiod_direction_input(gpiod_irq);
+ if (ret) {
+ nfc_err(dev, "Fail IRQ pin direction\n");
+ return ret;
+ }
+
+ /* Map the pin to an IRQ */
+ ret = gpiod_to_irq(gpiod_irq);
+ if (ret < 0) {
+ nfc_err(dev, "Fail pin IRQ mapping\n");
+ return ret;
+ }
+
+ nfc_info(dev, "GPIO resource, no:%d irq:%d\n",
+ desc_to_gpio(gpiod_irq), ret);
+ client->irq = ret;
+
+ return 0;
+}
+
#ifdef CONFIG_OF
static int pn544_hci_i2c_of_request_resources(struct i2c_client *client)
@@ -884,7 +981,7 @@ static int pn544_hci_i2c_of_request_resources(struct i2c_client *client)
phy->gpio_en = ret;
/* Configuration of EN GPIO */
- ret = gpio_request(phy->gpio_en, "pn544_en");
+ ret = gpio_request(phy->gpio_en, PN544_GPIO_NAME_EN);
if (ret) {
nfc_err(&client->dev, "Fail EN pin\n");
goto err_dt;
@@ -906,7 +1003,7 @@ static int pn544_hci_i2c_of_request_resources(struct i2c_client *client)
phy->gpio_fw = ret;
/* Configuration of FW GPIO */
- ret = gpio_request(phy->gpio_fw, "pn544_fw");
+ ret = gpio_request(phy->gpio_fw, PN544_GPIO_NAME_FW);
if (ret) {
nfc_err(&client->dev, "Fail FW pin\n");
goto err_gpio_en;
@@ -1001,6 +1098,14 @@ static int pn544_hci_i2c_probe(struct i2c_client *client,
phy->gpio_en = pdata->get_gpio(NFC_GPIO_ENABLE);
phy->gpio_fw = pdata->get_gpio(NFC_GPIO_FW_RESET);
phy->gpio_irq = pdata->get_gpio(NFC_GPIO_IRQ);
+ /* Using ACPI */
+ } else if (ACPI_HANDLE(&client->dev)) {
+ r = pn544_hci_i2c_acpi_request_resources(client);
+ if (r) {
+ nfc_err(&client->dev,
+ "Cannot get ACPI data\n");
+ return r;
+ }
} else {
nfc_err(&client->dev, "No platform data\n");
return -EINVAL;
@@ -1020,9 +1125,12 @@ static int pn544_hci_i2c_probe(struct i2c_client *client,
PN544_I2C_FRAME_HEADROOM, PN544_I2C_FRAME_TAILROOM,
PN544_HCI_I2C_LLC_MAX_PAYLOAD,
pn544_hci_i2c_fw_download, &phy->hdev);
- if (r < 0)
+ if (r < 0) {
+ nfc_err(&client->dev, "HCI Probing error\n");
goto err_hci;
+ }
+ nfc_info(&client->dev, "NFC I2C driver loaded\n");
return 0;
err_hci:
@@ -1080,6 +1188,7 @@ static struct i2c_driver pn544_hci_i2c_driver = {
.name = PN544_HCI_I2C_DRIVER_NAME,
.owner = THIS_MODULE,
.of_match_table = of_match_ptr(of_pn544_i2c_match),
+ .acpi_match_table = ACPI_PTR(pn544_hci_i2c_acpi_match),
},
.probe = pn544_hci_i2c_probe,
.id_table = pn544_hci_i2c_id_table,
diff --git a/net/nfc/core.c b/net/nfc/core.c
index 819b877..a53c2cc 100644
--- a/net/nfc/core.c
+++ b/net/nfc/core.c
@@ -32,6 +32,7 @@
#include "nfc.h"
+#define DEBUG
#define VERSION "0.1"
#define NFC_CHECK_PRES_FREQ_MS 2000
--
1.9.1