modem: Add M6718 modem access driver

Adds support for the STE M6718 modem to the modem access framework.

ST-Ericsson ID: 369397
ST-Ericsson FOSS-OUT ID: STETL-FOSS-OUT-12224
ST-Ericsson Linux next: NA

Change-Id: Iefbd8db9a7ab77c21fb09cbb3699a7d34ee555e1
Signed-off-by: Chris Blair <chris.blair@stericsson.com>
Reviewed-on: http://gerrit.lud.stericsson.com/gerrit/36316
Reviewed-by: QATOOLS
Reviewed-by: QABUILD
Reviewed-by: Andrew LYNN <andrew.lynn@stericsson.com>
Reviewed-by: Jonas ABERG <jonas.aberg@stericsson.com>

3 files changed, 105 insertions, 1 deletions

diff --git a/drivers/modem/Kconfig b/drivers/modem/Kconfig
index 95d4307775b..9ecbe00fd61 100644
--- a/drivers/modem/Kconfig
+++ b/drivers/modem/Kconfig
@@ -20,3 +20,12 @@ config MODEM_U8500
 	 If unsure, say N.
 
 source "drivers/modem/shrm/Kconfig"
+
+config MODEM_M6718
+	tristate "Modem Access driver for STE M6718 modem"
+	depends on MODEM
+	default n
+	help
+	 Add support for the modem access driver for the M6718 modem.
+
+	 If unsure, say N.
diff --git a/drivers/modem/Makefile b/drivers/modem/Makefile
index e1b3f376cce..c0df71e65a1 100644
--- a/drivers/modem/Makefile
+++ b/drivers/modem/Makefile
@@ -1,4 +1,4 @@
 obj-$(CONFIG_MODEM)       := modem_access.o
 obj-$(CONFIG_MODEM_U8500) += modem_u8500.o
 obj-$(CONFIG_U8500_SHRM)  += shrm/
-
+obj-$(CONFIG_MODEM_M6718) += modem_m6718.o
diff --git a/drivers/modem/modem_m6718.c b/drivers/modem/modem_m6718.c
new file mode 100644
index 00000000000..5e457c16003
--- /dev/null
+++ b/drivers/modem/modem_m6718.c
@@ -0,0 +1,95 @@
+/*
+ * Copyright (C) ST-Ericsson SA 2011
+ *
+ * License Terms: GNU General Public License v2
+ * Author: Chris Blair <chris.blair@stericsson.com>
+ *   based on modem_u8500.c
+ *
+ * Platform driver implementing access mechanisms to the M6718 modem.
+ */
+#include <linux/modem/modem.h>
+#include <linux/platform_device.h>
+#include <linux/err.h>
+
+static void modem_m6718_request(struct modem_dev *mdev)
+{
+	/* nothing to do - modem will wake when data is sent */
+}
+
+static void modem_m6718_release(struct modem_dev *mdev)
+{
+	/* nothing to do - modem does not need to be requested/released */
+}
+
+static int modem_m6718_is_requested(struct modem_dev *mdev)
+{
+	return 0;
+}
+
+static struct modem_ops modem_m6718_ops = {
+	.request = modem_m6718_request,
+	.release = modem_m6718_release,
+	.is_requested = modem_m6718_is_requested,
+};
+
+static struct modem_desc modem_m6718_desc = {
+	.name   = "m6718",
+	.id     = 0,
+	.ops    = &modem_m6718_ops,
+	.owner  = THIS_MODULE,
+};
+
+static int __devinit modem_m6718_probe(struct platform_device *pdev)
+{
+	struct modem_dev *mdev;
+	int err;
+
+	mdev = modem_register(&modem_m6718_desc, &pdev->dev,
+			NULL);
+	if (IS_ERR(mdev)) {
+		err = PTR_ERR(mdev);
+		dev_err(&pdev->dev, "failed to register %s: err %i\n",
+			modem_m6718_desc.name, err);
+	}
+
+	return 0;
+}
+
+static int __devexit modem_m6718_remove(struct platform_device *pdev)
+{
+	return 0;
+}
+
+static struct platform_driver modem_m6718_driver = {
+	.driver = {
+		.name = "modem-m6718",
+		.owner = THIS_MODULE,
+	},
+	.probe = modem_m6718_probe,
+	.remove = __devexit_p(modem_m6718_remove),
+};
+
+static int __init modem_m6718_init(void)
+{
+	int ret;
+
+	ret = platform_driver_register(&modem_m6718_driver);
+	if (ret < 0) {
+		printk(KERN_ERR "modem_m6718: platform driver reg failed\n");
+		return ret;
+	}
+
+	return 0;
+}
+
+static void __exit modem_m6718_exit(void)
+{
+	platform_driver_unregister(&modem_m6718_driver);
+}
+
+module_init(modem_m6718_init);
+module_exit(modem_m6718_exit);
+
+MODULE_AUTHOR("Chris Blair <chris.blair@stericsson.com>");
+MODULE_DESCRIPTION("M6718 modem access driver");
+MODULE_LICENSE("GPL v2");