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path: root/drivers/net/irda/ep7211_ir.c
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Diffstat (limited to 'drivers/net/irda/ep7211_ir.c')
-rw-r--r--drivers/net/irda/ep7211_ir.c122
1 files changed, 122 insertions, 0 deletions
diff --git a/drivers/net/irda/ep7211_ir.c b/drivers/net/irda/ep7211_ir.c
new file mode 100644
index 000000000000..31896262d21c
--- /dev/null
+++ b/drivers/net/irda/ep7211_ir.c
@@ -0,0 +1,122 @@
+/*
+ * IR port driver for the Cirrus Logic EP7211 processor.
+ *
+ * Copyright 2001, Blue Mug Inc. All rights reserved.
+ */
+
+#include <linux/module.h>
+#include <linux/delay.h>
+#include <linux/tty.h>
+#include <linux/init.h>
+
+#include <net/irda/irda.h>
+#include <net/irda/irda_device.h>
+
+#include <asm/io.h>
+#include <asm/hardware.h>
+
+#define MIN_DELAY 25 /* 15 us, but wait a little more to be sure */
+#define MAX_DELAY 10000 /* 1 ms */
+
+static void ep7211_ir_open(dongle_t *self, struct qos_info *qos);
+static void ep7211_ir_close(dongle_t *self);
+static int ep7211_ir_change_speed(struct irda_task *task);
+static int ep7211_ir_reset(struct irda_task *task);
+
+static struct dongle_reg dongle = {
+ .type = IRDA_EP7211_IR,
+ .open = ep7211_ir_open,
+ .close = ep7211_ir_close,
+ .reset = ep7211_ir_reset,
+ .change_speed = ep7211_ir_change_speed,
+ .owner = THIS_MODULE,
+};
+
+static void ep7211_ir_open(dongle_t *self, struct qos_info *qos)
+{
+ unsigned int syscon1, flags;
+
+ save_flags(flags); cli();
+
+ /* Turn on the SIR encoder. */
+ syscon1 = clps_readl(SYSCON1);
+ syscon1 |= SYSCON1_SIREN;
+ clps_writel(syscon1, SYSCON1);
+
+ /* XXX: We should disable modem status interrupts on the first
+ UART (interrupt #14). */
+
+ restore_flags(flags);
+}
+
+static void ep7211_ir_close(dongle_t *self)
+{
+ unsigned int syscon1, flags;
+
+ save_flags(flags); cli();
+
+ /* Turn off the SIR encoder. */
+ syscon1 = clps_readl(SYSCON1);
+ syscon1 &= ~SYSCON1_SIREN;
+ clps_writel(syscon1, SYSCON1);
+
+ /* XXX: If we've disabled the modem status interrupts, we should
+ reset them back to their original state. */
+
+ restore_flags(flags);
+}
+
+/*
+ * Function ep7211_ir_change_speed (task)
+ *
+ * Change speed of the EP7211 I/R port. We don't really have to do anything
+ * for the EP7211 as long as the rate is being changed at the serial port
+ * level.
+ */
+static int ep7211_ir_change_speed(struct irda_task *task)
+{
+ irda_task_next_state(task, IRDA_TASK_DONE);
+ return 0;
+}
+
+/*
+ * Function ep7211_ir_reset (task)
+ *
+ * Reset the EP7211 I/R. We don't really have to do anything.
+ *
+ */
+static int ep7211_ir_reset(struct irda_task *task)
+{
+ irda_task_next_state(task, IRDA_TASK_DONE);
+ return 0;
+}
+
+/*
+ * Function ep7211_ir_init(void)
+ *
+ * Initialize EP7211 I/R module
+ *
+ */
+static int __init ep7211_ir_init(void)
+{
+ return irda_device_register_dongle(&dongle);
+}
+
+/*
+ * Function ep7211_ir_cleanup(void)
+ *
+ * Cleanup EP7211 I/R module
+ *
+ */
+static void __exit ep7211_ir_cleanup(void)
+{
+ irda_device_unregister_dongle(&dongle);
+}
+
+MODULE_AUTHOR("Jon McClintock <jonm@bluemug.com>");
+MODULE_DESCRIPTION("EP7211 I/R driver");
+MODULE_LICENSE("GPL");
+MODULE_ALIAS("irda-dongle-8"); /* IRDA_EP7211_IR */
+
+module_init(ep7211_ir_init);
+module_exit(ep7211_ir_cleanup);