cg2900: bluetooth support for 5500

This patch enables cg2900 functionality in 5500 boards.
All tests have been made on B5500 (big board BBM R1A) with
new CG2900 hardware.
NOTE: For proper work new B5500 FPGA firmware is needed (v536).

Depends-On: I7820139cc44e347c5b113b1beb665c2489bf74c2

ST-Ericsson Linux next: NA
ST-Ericsson ID: 281802
ST-Ericsson FOSS-OUT ID: Trivial

Change-Id: I3df0bc1e41e60ce6abf4be9cb18465073ba8d738
Reviewed-on: http://gerrit.lud.stericsson.com/gerrit/30348
Reviewed-by: Par-Gunnar HJALMDAHL <par-gunnar.p.hjalmdahl@stericsson.com>
Reviewed-by: Virupax SADASHIVPETIMATH <virupax.sadashivpetimath@stericsson.com>
Tested-by: Virupax SADASHIVPETIMATH <virupax.sadashivpetimath@stericsson.com>

1 files changed, 64 insertions, 0 deletions

diff --git a/drivers/staging/cg2900/devices-cg2900-u5500.c b/drivers/staging/cg2900/devices-cg2900-u5500.c
new file mode 100644
index 00000000000..5b8c5fb8064
--- /dev/null
+++ b/drivers/staging/cg2900/devices-cg2900-u5500.c
@@ -0,0 +1,64 @@
+/*
+ * arch/arm/mach-ux500/devices-cg2900-u5500.c
+ *
+ * Copyright (C) ST-Ericsson SA 2010
+ * Authors:
+ * Par-Gunnar Hjalmdahl (par-gunnar.p.hjalmdahl@stericsson.com) for ST-Ericsson.
+ * Henrik Possung (henrik.possung@stericsson.com) for ST-Ericsson.
+ * Josef Kindberg (josef.kindberg@stericsson.com) for ST-Ericsson.
+ * Dariusz Szymszak (dariusz.xd.szymczak@stericsson.com) for ST-Ericsson.
+ * Kjell Andersson (kjell.k.andersson@stericsson.com) for ST-Ericsson.
+ * License terms:  GNU General Public License (GPL), version 2
+ *
+ * Board specific device support for the Linux Bluetooth HCI H:4 Driver
+ * for ST-Ericsson connectivity controller.
+ */
+
+#include <linux/delay.h>
+#include <linux/kernel.h>
+#include <linux/sched.h>
+#include <linux/clk.h>
+#include <linux/types.h>
+#include <linux/mfd/abx500/ab5500.h>
+
+#include <mach/prcmu-db5500.h>
+
+#include "devices-cg2900.h"
+
+/* prcmu resout1 pin is used for CG2900 reset*/
+void dcg2900_enable_chip(struct cg2900_chip_dev *dev)
+{
+	struct dcg2900_info *info = dev->b_data;
+
+	clk_enable(info->lpoclk);
+	/*
+	 * Due to a bug in CG2900 we cannot just set GPIO high to enable
+	 * the chip. We must wait more than 100 msecs before enbling the
+	 * chip.
+	 * - Set PDB to low.
+	 * - Wait for 100 msecs
+	 * - Set PDB to high.
+	 */
+	prcmu_resetout(1, 0);
+	schedule_timeout_uninterruptible(msecs_to_jiffies(
+					CHIP_ENABLE_PDB_LOW_TIMEOUT));
+	prcmu_resetout(1, 1);
+}
+
+void dcg2900_disable_chip(struct cg2900_chip_dev *dev)
+{
+	struct dcg2900_info *info = dev->b_data;
+
+	prcmu_resetout(1, 0);
+	clk_disable(info->lpoclk);
+}
+
+int dcg2900_setup(struct cg2900_chip_dev *dev,
+				struct dcg2900_info *info)
+{
+	info->lpoclk = clk_get(dev->dev, "lpoclk");
+	if (IS_ERR(info->lpoclk))
+		return PTR_ERR(info->lpoclk);
+
+	return 0;
+}