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Index: linux-2.6.27/drivers/input/misc/cy3218-btns.c
===================================================================
--- /dev/null
+++ linux-2.6.27/drivers/input/misc/cy3218-btns.c
@@ -0,0 +1,195 @@
+/*
+ * CAPSENSE Interface driver
+ *
+ *
+ * Copyright (C) 2007, CenoSYS (www.cenosys.com).
+ *
+ * Guillaume Ligneul <guillaume.ligneul@gmail.com>
+ * Jeremy Lainé <jeremy.laine@bolloretelecom.eu>
+ *
+ * This software program is licensed subject to the GNU General Public License
+ * (GPL).Version 2,June 1991, available at http://www.fsf.org/copyleft/gpl.html
+ */
+
+#include <linux/init.h>
+#include <linux/input-polldev.h>
+#include <linux/ioport.h>
+#include <linux/module.h>
+#include <linux/i2c.h>
+
+static int capsense_attach_adapter(struct i2c_adapter *adapter);
+static int capsense_detach_client(struct i2c_client *client);
+
+#define CAPSENSE_NAME "Capsense"
+/* i2c configuration */
+#define CAPSENSE_I2C_ADDR 0x25
+// To debug (may be add in include/linux/i2c-id.h)
+#define I2C_DRIVERID_CAPSENSE 98
+#define BUTTONS_POLL_INTERVAL 30 /* msec */
+#define CAP_STATE_GP0 0x88
+#define CAP_STATE_GP1 0x89
+#define MASK0 0x10
+#define MASK1 0x4
+#define MASK2 0x8
+#define MASK3 0x1
+
+
+static int poll_interval = BUTTONS_POLL_INTERVAL;
+module_param_named(poll, poll_interval, uint, 0);
+MODULE_PARM_DESC(poll, "poll interval in msec (30=default)");
+
+static const unsigned short normal_i2c[] = {
+ CAPSENSE_I2C_ADDR , I2C_CLIENT_END
+};
+I2C_CLIENT_INSMOD;
+
+static struct i2c_driver capsense_driver = {
+ .driver = {
+ .name = CAPSENSE_NAME,
+ },
+ .id = I2C_DRIVERID_CAPSENSE,
+ .attach_adapter = &capsense_attach_adapter,
+ .detach_client = &capsense_detach_client,
+};
+
+struct cy3218 {
+ struct input_polled_dev *ipdev;
+ struct i2c_client client;
+ unsigned char key_state;
+};
+
+unsigned short keymap[] = {
+ // GP0
+ KEY_F1,
+ KEY_ENTER,
+ KEY_DOWN,
+ KEY_BACKSPACE,
+ // GP1
+ KEY_UP,
+};
+
+static void handle_buttons(struct input_polled_dev *dev)
+{
+ struct cy3218 *capsense = dev->private;
+ u8 port_value;
+ u8 new_state = 0;
+ u8 changed;
+ int i;
+
+ // read status
+ port_value = i2c_smbus_read_byte_data(&capsense->client, CAP_STATE_GP0);
+ if (port_value & MASK0) new_state |= 0x01;
+ if (port_value & MASK1) new_state |= 0x02;
+ if (port_value & MASK2) new_state |= 0x04;
+ if (port_value & MASK3) new_state |= 0x08;
+
+ port_value = i2c_smbus_read_byte_data(&capsense->client, CAP_STATE_GP1);
+ if (port_value & MASK0) new_state |= 0x10;
+
+ // update keyboard state
+ changed = capsense->key_state ^ new_state;
+ for (i = 0; i < ARRAY_SIZE(keymap); i++)
+ if (changed & (1 << i))
+ input_report_key(dev->input, keymap[i], (new_state & (1 << i)));
+ capsense->key_state = new_state;
+ input_sync(dev->input);
+}
+
+static int
+capsense_probe(struct i2c_adapter *adapter, int addr, int kind)
+{
+ struct cy3218 *capsense;
+ struct input_polled_dev *ipdev;
+ struct input_dev *input;
+ int rc = 0, err = -ENOMEM, i=0;
+
+ capsense = kzalloc(sizeof(*capsense), GFP_KERNEL);
+ if (!capsense)
+ goto failout;
+
+ if (!i2c_check_functionality(adapter, I2C_FUNC_I2C)) {
+ goto failout;
+ }
+
+ ipdev = input_allocate_polled_device();
+ if (!ipdev)
+ goto failout;
+
+ capsense->key_state = 0;
+ capsense->ipdev = ipdev;
+ capsense->client.adapter = adapter;
+ capsense->client.addr = addr;
+ capsense->client.driver = &capsense_driver;
+ strlcpy(capsense->client.name, CAPSENSE_NAME, I2C_NAME_SIZE);
+ i2c_set_clientdata(&capsense->client, capsense);
+
+ rc = i2c_attach_client(&capsense->client);
+ if (rc)
+ goto out_attach;
+
+ ipdev->poll = handle_buttons;
+ ipdev->private = capsense;
+ ipdev->poll_interval = poll_interval;
+
+ input = ipdev->input;
+ input->name = "Capsense buttons";
+ input->phys = "capsense/input0";
+ input->id.bustype = BUS_I2C;
+ input->dev.parent = &capsense->client.dev;
+
+ input->keycode = keymap;
+ input->keycodemax = ARRAY_SIZE(keymap);
+ input->keycodesize = sizeof(unsigned short);
+
+ input_set_capability(input, EV_MSC, MSC_SCAN);
+ set_bit(EV_KEY, ipdev->input->evbit);
+
+ for (i = 0; i < ARRAY_SIZE(keymap); i++)
+ set_bit(keymap[i], ipdev->input->keybit);
+
+ rc = input_register_polled_device(ipdev);
+ if(rc)
+ goto out_polled;
+
+ return 0;
+
+out_polled:
+ i2c_detach_client(&capsense->client);
+out_attach:
+ input_free_polled_device(ipdev);
+failout:
+ return err;
+}
+
+static int
+capsense_attach_adapter (struct i2c_adapter *adapter)
+{
+ return i2c_probe(adapter, &addr_data, capsense_probe);
+}
+
+static int
+capsense_detach_client(struct i2c_client *client)
+{
+ struct cy3218 *capsense = i2c_get_clientdata(client);
+
+ input_unregister_polled_device(capsense->ipdev);
+ i2c_detach_client(&capsense->client);
+ input_free_polled_device(capsense->ipdev);
+ return 0;
+}
+
+static int __init capsense_buttons_init(void)
+{
+ return i2c_add_driver(&capsense_driver);
+}
+
+static void __exit capsense_buttons_exit(void)
+{
+ i2c_del_driver(&capsense_driver);
+}
+
+MODULE_AUTHOR("Guillaume Ligneul <guillaume.ligneul@cenosys.com>");
+MODULE_DESCRIPTION("Capsense CY3218 Input driver");
+MODULE_LICENSE("GPL");
+module_init(capsense_buttons_init);
+module_exit(capsense_buttons_exit);
Index: linux-2.6.27/drivers/input/misc/Kconfig
===================================================================
--- linux-2.6.27.orig/drivers/input/misc/Kconfig
+++ linux-2.6.27/drivers/input/misc/Kconfig
@@ -207,4 +207,12 @@ config HP_SDC_RTC
Say Y here if you want to support the built-in real time clock
of the HP SDC controller.
+config INPUT_CAPSENSE_BTNS
+ tristate "CAPSENSE CY3218 button interface"
+ select INPUT_POLLDEV
+ help
+ To compile this driver as a module, choose M here: the
+ module will be called cy3218-btns.
+ To change poll interval, invoque poll parameter in msecs.
+
endif
Index: linux-2.6.27/drivers/input/misc/Makefile
===================================================================
--- linux-2.6.27.orig/drivers/input/misc/Makefile
+++ linux-2.6.27/drivers/input/misc/Makefile
@@ -20,3 +20,5 @@ obj-$(CONFIG_HP_SDC_RTC) += hp_sdc_rtc.
obj-$(CONFIG_INPUT_UINPUT) += uinput.o
obj-$(CONFIG_INPUT_APANEL) += apanel.o
obj-$(CONFIG_INPUT_SGI_BTNS) += sgi_btns.o
+obj-$(CONFIG_INPUT_CAPSENSE_BTNS) += cy3218-btns.o
+
|
