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Date: Mon, 15 Oct 2012 10:58:38 +0530
From: Arun Murthy <arun.murthy@...ricsson.com>
To: <linux-kernel@...r.kernel.org>, <netdev@...r.kernel.org>,
<linux-doc@...r.kernel.org>, <gregkh@...uxfoundation.org>,
<alan@...rguk.ukuu.org.uk>
Cc: Arun Murthy <arun.murthy@...ricsson.com>
Subject: [PATCHv5 2/4] modem_shm: Register u8500 client for MAF
Register with Modem Access Framework(MAF) for u8500 platform. This will provide
interface to enable and disable modem access and also provide the status.
Signed-off-by: Arun Murthy <arun.murthy@...ricsson.com>
---
drivers/modem_shm/Kconfig | 11 +++++
drivers/modem_shm/Makefile | 1 +
drivers/modem_shm/modem_u8500.c | 91 +++++++++++++++++++++++++++++++++++++++
3 files changed, 103 insertions(+), 0 deletions(-)
create mode 100644 drivers/modem_shm/modem_u8500.c
diff --git a/drivers/modem_shm/Kconfig b/drivers/modem_shm/Kconfig
index f4b7e54..f59d3dc 100644
--- a/drivers/modem_shm/Kconfig
+++ b/drivers/modem_shm/Kconfig
@@ -7,3 +7,14 @@ config MODEM_SHM
and allows transparent access to modem to the client drivers.
If unsure, say N.
+
+config MODEM_U8500
+ bool "Modem Access driver for STE U8500 platform"
+ depends on MODEM_SHM
+ default n
+ help
+ Add support for Modem Access driver on STE U8500 platform which
+ uses Shared Memroy as IPC mechanism between Modem processor and
+ Application processor.
+
+ If unsure, say N.
diff --git a/drivers/modem_shm/Makefile b/drivers/modem_shm/Makefile
index b77bcc0..a9aac0f 100644
--- a/drivers/modem_shm/Makefile
+++ b/drivers/modem_shm/Makefile
@@ -1 +1,2 @@
obj-$(CONFIG_MODEM_SHM) := modem_access.o
+obj-$(CONFIG_MODEM_U8500) += modem_u8500.o
diff --git a/drivers/modem_shm/modem_u8500.c b/drivers/modem_shm/modem_u8500.c
new file mode 100644
index 0000000..924b6a2
--- /dev/null
+++ b/drivers/modem_shm/modem_u8500.c
@@ -0,0 +1,91 @@
+/*
+ * Copyright (C) ST-Ericsson SA 2011
+ *
+ * License Terms: GNU General Public License v2
+ * Author: Kumar Sanghvi
+ * Arun Murthy <arun.murthy@...ricsson.com>
+ *
+ * Platform driver implementing access mechanisms to modem
+ * on U8500 which uses Shared Memroy as IPC between Application
+ * Processor and Modem processor.
+ */
+#include <linux/module.h>
+#include <linux/err.h>
+#include <linux/slab.h>
+#include <linux/platform_device.h>
+#include <linux/modem_shm/modem.h>
+#include <linux/mfd/dbx500-prcmu.h>
+
+static int u8500_modem_request(struct modem_desc *mdesc)
+{
+ return prcmu_ac_wake_req();
+}
+
+static void u8500_modem_release(struct modem_desc *mdesc)
+{
+ prcmu_ac_sleep_req();
+}
+
+static int u8500_modem_is_requested(struct modem_desc *mdesc)
+{
+ return prcmu_is_ac_wake_requested();
+}
+
+static struct modem_desc u8500_modem_desc = {
+ .request = u8500_modem_request,
+ .release = u8500_modem_release,
+ .is_requested = u8500_modem_is_requested,
+ .name = "u8500-shrm-modem",
+ .no_clients = 2,
+ .cli_cnt = ATOMIC_INIT(0),
+ .use_cnt = ATOMIC_INIT(0),
+};
+
+static int __devinit u8500_modem_probe(struct platform_device *pdev)
+{
+ int err = 0;
+
+ u8500_modem_desc.dev = &pdev->dev;
+ err = modem_register(&pdev->dev, &u8500_modem_desc);
+ if (err) {
+ pr_err("failed to register %s: err %i\n",
+ u8500_modem_desc.name, err);
+ }
+
+ return err;
+}
+
+static int __devexit u8500_modem_remove(struct platform_device *pdev)
+{
+ modem_unregister(&u8500_modem_desc);
+ return 0;
+}
+
+static struct platform_driver u8500_modem_driver = {
+ .driver = {
+ .name = "u8500-modem",
+ .owner = THIS_MODULE,
+ },
+ .probe = u8500_modem_probe,
+ .remove = __devexit_p(u8500_modem_remove),
+};
+
+static int __init u8500_modem_init(void)
+{
+ int ret;
+
+ ret = platform_driver_register(&u8500_modem_driver);
+ if (ret < 0) {
+ printk(KERN_ERR "u8500_modem: platform driver reg failed\n");
+ return -ENODEV;
+ }
+
+ return 0;
+}
+
+static void __exit u8500_modem_exit(void)
+{
+ platform_driver_unregister(&u8500_modem_driver);
+}
+
+arch_initcall(u8500_modem_init);
--
1.7.0.4
--
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