2900 lines
82 KiB
Diff
2900 lines
82 KiB
Diff
Index: linux-2.6.17/drivers/input/touchscreen/Kconfig
|
|
===================================================================
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|
--- linux-2.6.17.orig/drivers/input/touchscreen/Kconfig 2006-09-19 20:35:35.060495500 +0200
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|
+++ linux-2.6.17/drivers/input/touchscreen/Kconfig 2006-09-19 20:36:47.965051750 +0200
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@@ -121,4 +121,57 @@ config TOUCHSCREEN_TSC2101
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To compile this driver as a module, choose M here: the
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module will be called ads7846_ts.
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+config TOUCHSCREEN_WM97XX
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+ tristate "Support for WM97xx AC97 touchscreen controllers"
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+ depends SND_AC97_BUS
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+
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+choice
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+ prompt "WM97xx codec type"
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+
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+config TOUCHSCREEN_WM9705
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+ bool "WM9705 Touchscreen interface support"
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+ depends on TOUCHSCREEN_WM97XX
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+ help
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|
+ Say Y here if you have the wm9705 touchscreen.
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|
+
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+ If unsure, say N.
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+
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+ To compile this driver as a module, choose M here: the
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+ module will be called wm9705.
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+
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+config TOUCHSCREEN_WM9712
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+ bool "WM9712 Touchscreen interface support"
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+ depends on TOUCHSCREEN_WM97XX
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+ help
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+ Say Y here if you have the wm9712 touchscreen.
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+
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+ If unsure, say N.
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+
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+ To compile this driver as a module, choose M here: the
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+ module will be called wm9712.
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+
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+config TOUCHSCREEN_WM9713
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+ bool "WM9713 Touchscreen interface support"
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+ depends on TOUCHSCREEN_WM97XX
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+ help
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+ Say Y here if you have the wm9713 touchscreen.
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|
+
|
|
+ If unsure, say N.
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+
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+ To compile this driver as a module, choose M here: the
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+ module will be called wm9713.
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+
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+endchoice
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+
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+config TOUCHSCREEN_WM97XX_PXA
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+ tristate "WM97xx PXA accelerated touch"
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+ depends on TOUCHSCREEN_WM97XX && ARCH_PXA
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+ help
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+ Say Y here for continuous mode touch on the PXA
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+
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+ If unsure, say N
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+
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+ To compile this driver as a module, choose M here: the
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+ module will be called pxa-wm97xx
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+
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endif
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|
Index: linux-2.6.17/drivers/input/touchscreen/Makefile
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|
===================================================================
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--- linux-2.6.17.orig/drivers/input/touchscreen/Makefile 2006-09-19 20:35:35.072496250 +0200
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+++ linux-2.6.17/drivers/input/touchscreen/Makefile 2006-09-19 20:37:40.540337500 +0200
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@@ -4,6 +4,8 @@
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# Each configuration option enables a list of files.
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+wm97xx-ts-objs := wm97xx-core.o
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+
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obj-$(CONFIG_TOUCHSCREEN_ADS7846) += ads7846.o
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obj-$(CONFIG_TOUCHSCREEN_BITSY) += h3600_ts_input.o
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obj-$(CONFIG_TOUCHSCREEN_CORGI) += corgi_ts.o
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@@ -13,3 +15,16 @@ obj-$(CONFIG_TOUCHSCREEN_MTOUCH) += mtou
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obj-$(CONFIG_TOUCHSCREEN_MK712) += mk712.o
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obj-$(CONFIG_TOUCHSCREEN_HP600) += hp680_ts_input.o
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obj-$(CONFIG_TOUCHSCREEN_TSC2101) += tsc2101_ts.o
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+obj-$(CONFIG_TOUCHSCREEN_WM97XX) += wm97xx-ts.o
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+obj-$(CONFIG_TOUCHSCREEN_WM97XX_PXA) += pxa-wm97xx.o
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+
|
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+ifeq ($(CONFIG_TOUCHSCREEN_WM9713),y)
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+wm97xx-ts-objs += wm9713.o
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+endif
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+
|
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+ifeq ($(CONFIG_TOUCHSCREEN_WM9712),y)
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+wm97xx-ts-objs += wm9712.o
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+endif
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+ifeq ($(CONFIG_TOUCHSCREEN_WM9705),y)
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+wm97xx-ts-objs += wm9705.o
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|
+endif
|
|
Index: linux-2.6.17/drivers/input/touchscreen/pxa-wm97xx.c
|
|
===================================================================
|
|
--- /dev/null 1970-01-01 00:00:00.000000000 +0000
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|
+++ linux-2.6.17/drivers/input/touchscreen/pxa-wm97xx.c 2006-09-19 20:36:47.965051750 +0200
|
|
@@ -0,0 +1,289 @@
|
|
+/*
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|
+ * pxa-wm97xx.c -- pxa-wm97xx Continuous Touch screen driver for
|
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+ * Wolfson WM97xx AC97 Codecs.
|
|
+ *
|
|
+ * Copyright 2004 Wolfson Microelectronics PLC.
|
|
+ * Author: Liam Girdwood
|
|
+ * liam.girdwood@wolfsonmicro.com or linux@wolfsonmicro.com
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|
+ * Parts Copyright : Ian Molton <spyro@f2s.com>
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|
+ * Andrew Zabolotny <zap@homelink.ru>
|
|
+ *
|
|
+ * This program is free software; you can redistribute it and/or modify it
|
|
+ * under the terms of the GNU General Public License as published by the
|
|
+ * Free Software Foundation; either version 2 of the License, or (at your
|
|
+ * option) any later version.
|
|
+ *
|
|
+ * Notes:
|
|
+ * This is a wm97xx extended touch driver to capture touch
|
|
+ * data in a continuous manner on the Intel XScale archictecture
|
|
+ *
|
|
+ * Features:
|
|
+ * - codecs supported:- WM9705, WM9712, WM9713
|
|
+ * - processors supported:- Intel XScale PXA25x, PXA26x, PXA27x
|
|
+ *
|
|
+ * Revision history
|
|
+ * 18th Aug 2004 Initial version.
|
|
+ * 26th Jul 2005 Improved continous read back and added FIFO flushing.
|
|
+ * 06th Sep 2005 Mike Arthur <linux@wolfsonmicro.com>
|
|
+ * Moved to using the wm97xx bus
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|
+ *
|
|
+ */
|
|
+
|
|
+#include <linux/module.h>
|
|
+#include <linux/moduleparam.h>
|
|
+#include <linux/version.h>
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|
+#include <linux/kernel.h>
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|
+#include <linux/init.h>
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|
+#include <linux/delay.h>
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|
+#include <linux/irq.h>
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|
+#include <linux/wm97xx.h>
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|
+#include <asm/io.h>
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|
+#include <asm/arch/pxa-regs.h>
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|
+
|
|
+#define VERSION "0.13"
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|
+
|
|
+struct continuous {
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|
+ u16 id; /* codec id */
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|
+ u8 code; /* continuous code */
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|
+ u8 reads; /* number of coord reads per read cycle */
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|
+ u32 speed; /* number of coords per second */
|
|
+};
|
|
+
|
|
+#define WM_READS(sp) ((sp / HZ) + 1)
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|
+
|
|
+static const struct continuous cinfo[] = {
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|
+ {WM9705_ID2, 0, WM_READS(94), 94},
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|
+ {WM9705_ID2, 1, WM_READS(188), 188},
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+ {WM9705_ID2, 2, WM_READS(375), 375},
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+ {WM9705_ID2, 3, WM_READS(750), 750},
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|
+ {WM9712_ID2, 0, WM_READS(94), 94},
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+ {WM9712_ID2, 1, WM_READS(188), 188},
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|
+ {WM9712_ID2, 2, WM_READS(375), 375},
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+ {WM9712_ID2, 3, WM_READS(750), 750},
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|
+ {WM9713_ID2, 0, WM_READS(94), 94},
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|
+ {WM9713_ID2, 1, WM_READS(120), 120},
|
|
+ {WM9713_ID2, 2, WM_READS(154), 154},
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+ {WM9713_ID2, 3, WM_READS(188), 188},
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|
+};
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+
|
|
+/* continuous speed index */
|
|
+static int sp_idx = 0;
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|
+static u16 last = 0, tries = 0;
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|
+
|
|
+/*
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|
+ * Pen sampling frequency (Hz) in continuous mode.
|
|
+ */
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+static int cont_rate = 200;
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|
+module_param(cont_rate, int, 0);
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+MODULE_PARM_DESC(cont_rate, "Sampling rate in continuous mode (Hz)");
|
|
+
|
|
+/*
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|
+ * Pen down detection.
|
|
+ *
|
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+ * This driver can either poll or use an interrupt to indicate a pen down
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+ * event. If the irq request fails then it will fall back to polling mode.
|
|
+ */
|
|
+static int pen_int = 1;
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|
+module_param(pen_int, int, 0);
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|
+MODULE_PARM_DESC(pen_int, "Pen down detection (1 = interrupt, 0 = polling)");
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+
|
|
+/*
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+ * Pressure readback.
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|
+ *
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|
+ * Set to 1 to read back pen down pressure
|
|
+ */
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|
+static int pressure = 0;
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+module_param(pressure, int, 0);
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|
+MODULE_PARM_DESC(pressure, "Pressure readback (1 = pressure, 0 = no pressure)");
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+
|
|
+/*
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|
+ * AC97 touch data slot.
|
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+ *
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|
+ * Touch screen readback data ac97 slot
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|
+ */
|
|
+static int ac97_touch_slot = 5;
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+module_param(ac97_touch_slot, int, 0);
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+MODULE_PARM_DESC(ac97_touch_slot, "Touch screen data slot AC97 number");
|
|
+
|
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+
|
|
+/* flush AC97 slot 5 FIFO on pxa machines */
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|
+#ifdef CONFIG_PXA27x
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+void wm97xx_acc_pen_up (struct wm97xx* wm)
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+{
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|
+ set_current_state(TASK_INTERRUPTIBLE);
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|
+ schedule_timeout(1);
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+
|
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+ while (MISR & (1 << 2))
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|
+ MODR;
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|
+}
|
|
+#else
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|
+void wm97xx_acc_pen_up (struct wm97xx* wm)
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|
+{
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|
+ int count = 16;
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|
+ set_current_state(TASK_INTERRUPTIBLE);
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|
+ schedule_timeout(1);
|
|
+
|
|
+ while (count < 16) {
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|
+ MODR;
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|
+ count--;
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+ }
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+}
|
|
+#endif
|
|
+
|
|
+int wm97xx_acc_pen_down (struct wm97xx* wm)
|
|
+{
|
|
+ u16 x, y, p = 0x100 | WM97XX_ADCSEL_PRES;
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|
+ int reads = 0;
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|
+
|
|
+ /* data is never immediately available after pen down irq */
|
|
+ set_current_state(TASK_INTERRUPTIBLE);
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|
+ schedule_timeout(1);
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|
+
|
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+ if (tries > 5){
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|
+ tries = 0;
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|
+ return RC_PENUP;
|
|
+ }
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+
|
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+ x = MODR;
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+ if (x == last) {
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+ tries++;
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+ return RC_AGAIN;
|
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+ }
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+ last = x;
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+ do {
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+ if (reads)
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+ x= MODR;
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+ y= MODR;
|
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+ if (pressure)
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+ p = MODR;
|
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+
|
|
+ /* are samples valid */
|
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+ if ((x & 0x7000) != WM97XX_ADCSEL_X ||
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+ (y & 0x7000) != WM97XX_ADCSEL_Y ||
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+ (p & 0x7000) != WM97XX_ADCSEL_PRES)
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+ goto up;
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+
|
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+ /* coordinate is good */
|
|
+ tries = 0;
|
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+ //printk("x %x y %x p %x\n", x,y,p);
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+ input_report_abs (wm->input_dev, ABS_X, x & 0xfff);
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+ input_report_abs (wm->input_dev, ABS_Y, y & 0xfff);
|
|
+ input_report_abs (wm->input_dev, ABS_PRESSURE, p & 0xfff);
|
|
+ input_sync (wm->input_dev);
|
|
+ reads++;
|
|
+ } while (reads < cinfo[sp_idx].reads);
|
|
+up:
|
|
+ return RC_PENDOWN | RC_AGAIN;
|
|
+}
|
|
+
|
|
+int wm97xx_acc_startup(struct wm97xx* wm)
|
|
+{
|
|
+ int idx = 0;
|
|
+
|
|
+ /* check we have a codec */
|
|
+ if (wm->ac97 == NULL)
|
|
+ return -ENODEV;
|
|
+
|
|
+ /* Go you big red fire engine */
|
|
+ for (idx = 0; idx < ARRAY_SIZE(cinfo); idx++) {
|
|
+ if (wm->id != cinfo[idx].id)
|
|
+ continue;
|
|
+ sp_idx = idx;
|
|
+ if (cont_rate <= cinfo[idx].speed)
|
|
+ break;
|
|
+ }
|
|
+ wm->acc_rate = cinfo[sp_idx].code;
|
|
+ wm->acc_slot = ac97_touch_slot;
|
|
+ printk(KERN_INFO "pxa2xx accelerated touchscreen driver, %d samples (sec)\n",
|
|
+ cinfo[sp_idx].speed);
|
|
+
|
|
+ /* codec specific irq config */
|
|
+ if (pen_int) {
|
|
+ switch (wm->id) {
|
|
+ case WM9705_ID2:
|
|
+ wm->pen_irq = IRQ_GPIO(4);
|
|
+ set_irq_type(IRQ_GPIO(4), IRQT_BOTHEDGE);
|
|
+ break;
|
|
+ case WM9712_ID2:
|
|
+ case WM9713_ID2:
|
|
+ /* enable pen down interrupt */
|
|
+ /* use PEN_DOWN GPIO 13 to assert IRQ on GPIO line 2 */
|
|
+ wm->pen_irq = MAINSTONE_AC97_IRQ;
|
|
+ wm97xx_config_gpio(wm, WM97XX_GPIO_13, WM97XX_GPIO_IN,
|
|
+ WM97XX_GPIO_POL_HIGH, WM97XX_GPIO_STICKY, WM97XX_GPIO_WAKE);
|
|
+ wm97xx_config_gpio(wm, WM97XX_GPIO_2, WM97XX_GPIO_OUT,
|
|
+ WM97XX_GPIO_POL_HIGH, WM97XX_GPIO_NOTSTICKY, WM97XX_GPIO_NOWAKE);
|
|
+ break;
|
|
+ default:
|
|
+ printk(KERN_WARNING "pen down irq not supported on this device\n");
|
|
+ pen_int = 0;
|
|
+ break;
|
|
+ }
|
|
+ }
|
|
+
|
|
+ return 0;
|
|
+}
|
|
+
|
|
+void wm97xx_acc_shutdown(struct wm97xx* wm)
|
|
+{
|
|
+ /* codec specific deconfig */
|
|
+ if (pen_int) {
|
|
+ switch (wm->id & 0xffff) {
|
|
+ case WM9705_ID2:
|
|
+ wm->pen_irq = 0;
|
|
+ break;
|
|
+ case WM9712_ID2:
|
|
+ case WM9713_ID2:
|
|
+ /* disable interrupt */
|
|
+ wm->pen_irq = 0;
|
|
+ break;
|
|
+ }
|
|
+ }
|
|
+}
|
|
+
|
|
+static struct wm97xx_mach_ops pxa_mach_ops = {
|
|
+ .acc_enabled = 1,
|
|
+ .acc_pen_up = wm97xx_acc_pen_up,
|
|
+ .acc_pen_down = wm97xx_acc_pen_down,
|
|
+ .acc_startup = wm97xx_acc_startup,
|
|
+ .acc_shutdown = wm97xx_acc_shutdown,
|
|
+};
|
|
+
|
|
+int pxa_wm97xx_probe(struct device *dev)
|
|
+{
|
|
+ struct wm97xx *wm = dev->driver_data;
|
|
+ return wm97xx_register_mach_ops (wm, &pxa_mach_ops);
|
|
+}
|
|
+
|
|
+int pxa_wm97xx_remove(struct device *dev)
|
|
+{
|
|
+ struct wm97xx *wm = dev->driver_data;
|
|
+ wm97xx_unregister_mach_ops (wm);
|
|
+ return 0;
|
|
+}
|
|
+
|
|
+static struct device_driver pxa_wm97xx_driver = {
|
|
+ .name = "wm97xx-touchscreen",
|
|
+ .bus = &wm97xx_bus_type,
|
|
+ .owner = THIS_MODULE,
|
|
+ .probe = pxa_wm97xx_probe,
|
|
+ .remove = pxa_wm97xx_remove
|
|
+};
|
|
+
|
|
+static int __init pxa_wm97xx_init(void)
|
|
+{
|
|
+ return driver_register(&pxa_wm97xx_driver);
|
|
+}
|
|
+
|
|
+static void __exit pxa_wm97xx_exit(void)
|
|
+{
|
|
+ driver_unregister(&pxa_wm97xx_driver);
|
|
+}
|
|
+
|
|
+module_init(pxa_wm97xx_init);
|
|
+module_exit(pxa_wm97xx_exit);
|
|
+
|
|
+/* Module information */
|
|
+MODULE_AUTHOR("Liam Girdwood <liam.girdwood@wolfsonmicro.com>");
|
|
+MODULE_DESCRIPTION("wm97xx continuous touch driver for pxa2xx");
|
|
+MODULE_LICENSE("GPL");
|
|
Index: linux-2.6.17/drivers/input/touchscreen/wm9705.c
|
|
===================================================================
|
|
--- /dev/null 1970-01-01 00:00:00.000000000 +0000
|
|
+++ linux-2.6.17/drivers/input/touchscreen/wm9705.c 2006-09-19 20:36:47.969052000 +0200
|
|
@@ -0,0 +1,360 @@
|
|
+/*
|
|
+ * wm9705.c -- Codec driver for Wolfson WM9705 AC97 Codec.
|
|
+ *
|
|
+ * Copyright 2003, 2004, 2005, 2006 Wolfson Microelectronics PLC.
|
|
+ * Author: Liam Girdwood
|
|
+ * liam.girdwood@wolfsonmicro.com or linux@wolfsonmicro.com
|
|
+ * Parts Copyright : Ian Molton <spyro@f2s.com>
|
|
+ * Andrew Zabolotny <zap@homelink.ru>
|
|
+ * Russell King <rmk@arm.linux.org.uk>
|
|
+ *
|
|
+ * This program is free software; you can redistribute it and/or modify it
|
|
+ * under the terms of the GNU General Public License as published by the
|
|
+ * Free Software Foundation; either version 2 of the License, or (at your
|
|
+ * option) any later version.
|
|
+ *
|
|
+ * Revision history
|
|
+ * 6th Sep 2006 Mike Arthur <linux@wolfsonmicro.com>
|
|
+ * Added pre and post sample calls.
|
|
+ *
|
|
+ */
|
|
+
|
|
+#include <linux/module.h>
|
|
+#include <linux/moduleparam.h>
|
|
+#include <linux/version.h>
|
|
+#include <linux/kernel.h>
|
|
+#include <linux/input.h>
|
|
+#include <linux/delay.h>
|
|
+#include <linux/bitops.h>
|
|
+#include <linux/wm97xx.h>
|
|
+
|
|
+#define TS_NAME "wm97xx"
|
|
+#define WM9705_VERSION "0.62"
|
|
+#define DEFAULT_PRESSURE 0xb0c0
|
|
+
|
|
+/*
|
|
+ * Debug
|
|
+ */
|
|
+#if 0
|
|
+#define dbg(format, arg...) printk(KERN_DEBUG TS_NAME ": " format "\n" , ## arg)
|
|
+#else
|
|
+#define dbg(format, arg...)
|
|
+#endif
|
|
+#define err(format, arg...) printk(KERN_ERR TS_NAME ": " format "\n" , ## arg)
|
|
+#define info(format, arg...) printk(KERN_INFO TS_NAME ": " format "\n" , ## arg)
|
|
+#define warn(format, arg...) printk(KERN_WARNING TS_NAME ": " format "\n" , ## arg)
|
|
+
|
|
+/*
|
|
+ * Module parameters
|
|
+ */
|
|
+
|
|
+/*
|
|
+ * Set current used for pressure measurement.
|
|
+ *
|
|
+ * Set pil = 2 to use 400uA
|
|
+ * pil = 1 to use 200uA and
|
|
+ * pil = 0 to disable pressure measurement.
|
|
+ *
|
|
+ * This is used to increase the range of values returned by the adc
|
|
+ * when measureing touchpanel pressure.
|
|
+ */
|
|
+static int pil = 0;
|
|
+module_param(pil, int, 0);
|
|
+MODULE_PARM_DESC(pil, "Set current used for pressure measurement.");
|
|
+
|
|
+/*
|
|
+ * Set threshold for pressure measurement.
|
|
+ *
|
|
+ * Pen down pressure below threshold is ignored.
|
|
+ */
|
|
+static int pressure = DEFAULT_PRESSURE & 0xfff;
|
|
+module_param(pressure, int, 0);
|
|
+MODULE_PARM_DESC(pressure, "Set threshold for pressure measurement.");
|
|
+
|
|
+/*
|
|
+ * Set adc sample delay.
|
|
+ *
|
|
+ * For accurate touchpanel measurements, some settling time may be
|
|
+ * required between the switch matrix applying a voltage across the
|
|
+ * touchpanel plate and the ADC sampling the signal.
|
|
+ *
|
|
+ * This delay can be set by setting delay = n, where n is the array
|
|
+ * position of the delay in the array delay_table below.
|
|
+ * Long delays > 1ms are supported for completeness, but are not
|
|
+ * recommended.
|
|
+ */
|
|
+static int delay = 4;
|
|
+module_param(delay, int, 0);
|
|
+MODULE_PARM_DESC(delay, "Set adc sample delay.");
|
|
+
|
|
+/*
|
|
+ * Pen detect comparator threshold.
|
|
+ *
|
|
+ * 0 to Vmid in 15 steps, 0 = use zero power comparator with Vmid threshold
|
|
+ * i.e. 1 = Vmid/15 threshold
|
|
+ * 15 = Vmid/1 threshold
|
|
+ *
|
|
+ * Adjust this value if you are having problems with pen detect not
|
|
+ * detecting any down events.
|
|
+ */
|
|
+static int pdd = 8;
|
|
+module_param(pdd, int, 0);
|
|
+MODULE_PARM_DESC(pdd, "Set pen detect comparator threshold");
|
|
+
|
|
+/*
|
|
+ * Set adc mask function.
|
|
+ *
|
|
+ * Sources of glitch noise, such as signals driving an LCD display, may feed
|
|
+ * through to the touch screen plates and affect measurement accuracy. In
|
|
+ * order to minimise this, a signal may be applied to the MASK pin to delay or
|
|
+ * synchronise the sampling.
|
|
+ *
|
|
+ * 0 = No delay or sync
|
|
+ * 1 = High on pin stops conversions
|
|
+ * 2 = Edge triggered, edge on pin delays conversion by delay param (above)
|
|
+ * 3 = Edge triggered, edge on pin starts conversion after delay param
|
|
+ */
|
|
+static int mask = 0;
|
|
+module_param(mask, int, 0);
|
|
+MODULE_PARM_DESC(mask, "Set adc mask function.");
|
|
+
|
|
+/*
|
|
+ * ADC sample delay times in uS
|
|
+ */
|
|
+static const int delay_table[] = {
|
|
+ 21, // 1 AC97 Link frames
|
|
+ 42, // 2
|
|
+ 84, // 4
|
|
+ 167, // 8
|
|
+ 333, // 16
|
|
+ 667, // 32
|
|
+ 1000, // 48
|
|
+ 1333, // 64
|
|
+ 2000, // 96
|
|
+ 2667, // 128
|
|
+ 3333, // 160
|
|
+ 4000, // 192
|
|
+ 4667, // 224
|
|
+ 5333, // 256
|
|
+ 6000, // 288
|
|
+ 0 // No delay, switch matrix always on
|
|
+};
|
|
+
|
|
+/*
|
|
+ * Delay after issuing a POLL command.
|
|
+ *
|
|
+ * The delay is 3 AC97 link frames + the touchpanel settling delay
|
|
+ */
|
|
+static inline void poll_delay(int d)
|
|
+{
|
|
+ udelay (3 * AC97_LINK_FRAME + delay_table [d]);
|
|
+}
|
|
+
|
|
+/*
|
|
+ * set up the physical settings of the WM9705
|
|
+ */
|
|
+static void init_wm9705_phy(struct wm97xx* wm)
|
|
+{
|
|
+ u16 dig1 = 0, dig2 = WM97XX_RPR;
|
|
+
|
|
+ /*
|
|
+ * mute VIDEO and AUX as they share X and Y touchscreen
|
|
+ * inputs on the WM9705
|
|
+ */
|
|
+ wm97xx_reg_write(wm, AC97_AUX, 0x8000);
|
|
+ wm97xx_reg_write(wm, AC97_VIDEO, 0x8000);
|
|
+
|
|
+ /* touchpanel pressure current*/
|
|
+ if (pil == 2) {
|
|
+ dig2 |= WM9705_PIL;
|
|
+ dbg("setting pressure measurement current to 400uA.");
|
|
+ } else if (pil)
|
|
+ dbg("setting pressure measurement current to 200uA.");
|
|
+ if(!pil)
|
|
+ pressure = 0;
|
|
+
|
|
+ /* polling mode sample settling delay */
|
|
+ if (delay!=4) {
|
|
+ if (delay < 0 || delay > 15) {
|
|
+ dbg("supplied delay out of range.");
|
|
+ delay = 4;
|
|
+ }
|
|
+ }
|
|
+ dig1 &= 0xff0f;
|
|
+ dig1 |= WM97XX_DELAY(delay);
|
|
+ dbg("setting adc sample delay to %d u Secs.", delay_table[delay]);
|
|
+
|
|
+ /* WM9705 pdd */
|
|
+ dig2 |= (pdd & 0x000f);
|
|
+ dbg("setting pdd to Vmid/%d", 1 - (pdd & 0x000f));
|
|
+
|
|
+ /* mask */
|
|
+ dig2 |= ((mask & 0x3) << 4);
|
|
+
|
|
+ wm97xx_reg_write(wm, AC97_WM97XX_DIGITISER1, dig1);
|
|
+ wm97xx_reg_write(wm, AC97_WM97XX_DIGITISER2, dig2);
|
|
+}
|
|
+
|
|
+static int wm9705_digitiser_ioctl(struct wm97xx* wm, int cmd)
|
|
+{
|
|
+ switch(cmd) {
|
|
+ case WM97XX_DIG_START:
|
|
+ wm97xx_reg_write(wm, AC97_WM97XX_DIGITISER2, wm->dig[2] | WM97XX_PRP_DET_DIG);
|
|
+ wm97xx_reg_read(wm, AC97_WM97XX_DIGITISER_RD); /* dummy read */
|
|
+ break;
|
|
+ case WM97XX_DIG_STOP:
|
|
+ wm97xx_reg_write(wm, AC97_WM97XX_DIGITISER2, wm->dig[2] & ~WM97XX_PRP_DET_DIG);
|
|
+ break;
|
|
+ case WM97XX_AUX_PREPARE:
|
|
+ memcpy(wm->dig_save, wm->dig, sizeof(wm->dig));
|
|
+ wm97xx_reg_write(wm, AC97_WM97XX_DIGITISER1, 0);
|
|
+ wm97xx_reg_write(wm, AC97_WM97XX_DIGITISER2, WM97XX_PRP_DET_DIG);
|
|
+ break;
|
|
+ case WM97XX_DIG_RESTORE:
|
|
+ wm97xx_reg_write(wm, AC97_WM97XX_DIGITISER1, wm->dig_save[1]);
|
|
+ wm97xx_reg_write(wm, AC97_WM97XX_DIGITISER2, wm->dig_save[2]);
|
|
+ break;
|
|
+ case WM97XX_PHY_INIT:
|
|
+ init_wm9705_phy(wm);
|
|
+ break;
|
|
+ default:
|
|
+ return -EINVAL;
|
|
+ }
|
|
+ return 0;
|
|
+}
|
|
+
|
|
+static inline int is_pden (struct wm97xx* wm)
|
|
+{
|
|
+ return wm->dig[2] & WM9705_PDEN;
|
|
+}
|
|
+
|
|
+/*
|
|
+ * Read a sample from the WM9705 adc in polling mode.
|
|
+ */
|
|
+static int wm9705_poll_sample (struct wm97xx* wm, int adcsel, int *sample)
|
|
+{
|
|
+ int timeout = 5 * delay;
|
|
+
|
|
+ if (!wm->pen_probably_down) {
|
|
+ u16 data = wm97xx_reg_read(wm, AC97_WM97XX_DIGITISER_RD);
|
|
+ if (!(data & WM97XX_PEN_DOWN))
|
|
+ return RC_PENUP;
|
|
+ wm->pen_probably_down = 1;
|
|
+ }
|
|
+
|
|
+ /* set up digitiser */
|
|
+ if (adcsel & 0x8000)
|
|
+ adcsel = ((adcsel & 0x7fff) + 3) << 12;
|
|
+
|
|
+ if (wm->mach_ops && wm->mach_ops->pre_sample)
|
|
+ wm->mach_ops->pre_sample(adcsel);
|
|
+ wm97xx_reg_write(wm, AC97_WM97XX_DIGITISER1, adcsel | WM97XX_POLL | WM97XX_DELAY(delay));
|
|
+
|
|
+ /* wait 3 AC97 time slots + delay for conversion */
|
|
+ poll_delay (delay);
|
|
+
|
|
+ /* wait for POLL to go low */
|
|
+ while ((wm97xx_reg_read(wm, AC97_WM97XX_DIGITISER1) & WM97XX_POLL) && timeout) {
|
|
+ udelay(AC97_LINK_FRAME);
|
|
+ timeout--;
|
|
+ }
|
|
+
|
|
+ if (timeout <= 0) {
|
|
+ /* If PDEN is set, we can get a timeout when pen goes up */
|
|
+ if (is_pden(wm))
|
|
+ wm->pen_probably_down = 0;
|
|
+ else
|
|
+ dbg ("adc sample timeout");
|
|
+ return RC_PENUP;
|
|
+ }
|
|
+
|
|
+ *sample = wm97xx_reg_read(wm, AC97_WM97XX_DIGITISER_RD);
|
|
+ if (wm->mach_ops && wm->mach_ops->post_sample)
|
|
+ wm->mach_ops->post_sample(adcsel);
|
|
+
|
|
+ /* check we have correct sample */
|
|
+ if ((*sample & WM97XX_ADCSEL_MASK) != adcsel) {
|
|
+ dbg ("adc wrong sample, read %x got %x", adcsel,
|
|
+ *sample & WM97XX_ADCSEL_MASK);
|
|
+ return RC_PENUP;
|
|
+ }
|
|
+
|
|
+ if (!(*sample & WM97XX_PEN_DOWN)) {
|
|
+ wm->pen_probably_down = 0;
|
|
+ return RC_PENUP;
|
|
+ }
|
|
+
|
|
+ return RC_VALID;
|
|
+}
|
|
+
|
|
+/*
|
|
+ * Sample the WM9705 touchscreen in polling mode
|
|
+ */
|
|
+static int wm9705_poll_touch(struct wm97xx* wm, struct wm97xx_data *data)
|
|
+{
|
|
+ int rc;
|
|
+
|
|
+ if ((rc = wm9705_poll_sample(wm, WM97XX_ADCSEL_X, &data->x)) != RC_VALID)
|
|
+ return rc;
|
|
+ if ((rc = wm9705_poll_sample(wm, WM97XX_ADCSEL_Y, &data->y)) != RC_VALID)
|
|
+ return rc;
|
|
+ if (pil) {
|
|
+ if ((rc = wm9705_poll_sample(wm, WM97XX_ADCSEL_PRES, &data->p)) != RC_VALID)
|
|
+ return rc;
|
|
+ } else
|
|
+ data->p = DEFAULT_PRESSURE;
|
|
+
|
|
+ return RC_VALID;
|
|
+}
|
|
+
|
|
+/*
|
|
+ * Enable WM9705 continuous mode, i.e. touch data is streamed across an AC97 slot
|
|
+ */
|
|
+static int wm9705_acc_enable (struct wm97xx* wm, int enable)
|
|
+{
|
|
+ u16 dig1, dig2;
|
|
+ int ret = 0;
|
|
+
|
|
+ dig1 = wm->dig[1];
|
|
+ dig2 = wm->dig[2];
|
|
+
|
|
+ if (enable) {
|
|
+ /* continous mode */
|
|
+ if (wm->mach_ops->acc_startup && (ret = wm->mach_ops->acc_startup(wm)) < 0)
|
|
+ return ret;
|
|
+ dig1 &= ~(WM97XX_CM_RATE_MASK | WM97XX_ADCSEL_MASK |
|
|
+ WM97XX_DELAY_MASK | WM97XX_SLT_MASK);
|
|
+ dig1 |= WM97XX_CTC | WM97XX_COO | WM97XX_SLEN |
|
|
+ WM97XX_DELAY (delay) |
|
|
+ WM97XX_SLT (wm->acc_slot) |
|
|
+ WM97XX_RATE (wm->acc_rate);
|
|
+ if (pil)
|
|
+ dig1 |= WM97XX_ADCSEL_PRES;
|
|
+ dig2 |= WM9705_PDEN;
|
|
+ } else {
|
|
+ dig1 &= ~(WM97XX_CTC | WM97XX_COO | WM97XX_SLEN);
|
|
+ dig2 &= ~WM9705_PDEN;
|
|
+ if (wm->mach_ops->acc_shutdown)
|
|
+ wm->mach_ops->acc_shutdown(wm);
|
|
+ }
|
|
+
|
|
+ wm97xx_reg_write(wm, AC97_WM97XX_DIGITISER1, dig1);
|
|
+ wm97xx_reg_write(wm, AC97_WM97XX_DIGITISER2, dig2);
|
|
+ return ret;
|
|
+}
|
|
+
|
|
+struct wm97xx_codec_drv wm97xx_codec = {
|
|
+ .id = WM9705_ID2,
|
|
+ .name = "wm9705",
|
|
+ .poll_sample = wm9705_poll_sample,
|
|
+ .poll_touch = wm9705_poll_touch,
|
|
+ .acc_enable = wm9705_acc_enable,
|
|
+ .digitiser_ioctl = wm9705_digitiser_ioctl,
|
|
+};
|
|
+
|
|
+EXPORT_SYMBOL_GPL(wm97xx_codec);
|
|
+
|
|
+/* Module information */
|
|
+MODULE_AUTHOR("Liam Girdwood, liam.girdwood@wolfsonmicro.com, www.wolfsonmicro.com");
|
|
+MODULE_DESCRIPTION("WM9705 Touch Screen Driver");
|
|
+MODULE_LICENSE("GPL");
|
|
Index: linux-2.6.17/drivers/input/touchscreen/wm9712.c
|
|
===================================================================
|
|
--- /dev/null 1970-01-01 00:00:00.000000000 +0000
|
|
+++ linux-2.6.17/drivers/input/touchscreen/wm9712.c 2006-09-19 20:36:47.969052000 +0200
|
|
@@ -0,0 +1,464 @@
|
|
+/*
|
|
+ * wm9712.c -- Codec driver for Wolfson WM9712 AC97 Codecs.
|
|
+ *
|
|
+ * Copyright 2003, 2004, 2005, 2006 Wolfson Microelectronics PLC.
|
|
+ * Author: Liam Girdwood
|
|
+ * liam.girdwood@wolfsonmicro.com or linux@wolfsonmicro.com
|
|
+ * Parts Copyright : Ian Molton <spyro@f2s.com>
|
|
+ * Andrew Zabolotny <zap@homelink.ru>
|
|
+ * Russell King <rmk@arm.linux.org.uk>
|
|
+ *
|
|
+ * This program is free software; you can redistribute it and/or modify it
|
|
+ * under the terms of the GNU General Public License as published by the
|
|
+ * Free Software Foundation; either version 2 of the License, or (at your
|
|
+ * option) any later version.
|
|
+ *
|
|
+ * Revision history
|
|
+ * 4th Jul 2005 Initial version.
|
|
+ * 6th Sep 2006 Mike Arthur <linux@wolfsonmicro.com>
|
|
+ * Added pre and post sample calls.
|
|
+ *
|
|
+ */
|
|
+
|
|
+#include <linux/module.h>
|
|
+#include <linux/moduleparam.h>
|
|
+#include <linux/version.h>
|
|
+#include <linux/kernel.h>
|
|
+#include <linux/input.h>
|
|
+#include <linux/delay.h>
|
|
+#include <linux/bitops.h>
|
|
+#include <linux/wm97xx.h>
|
|
+
|
|
+#define TS_NAME "wm97xx"
|
|
+#define WM9712_VERSION "0.61"
|
|
+#define DEFAULT_PRESSURE 0xb0c0
|
|
+
|
|
+/*
|
|
+ * Debug
|
|
+ */
|
|
+#if 0
|
|
+#define dbg(format, arg...) printk(KERN_DEBUG TS_NAME ": " format "\n" , ## arg)
|
|
+#else
|
|
+#define dbg(format, arg...)
|
|
+#endif
|
|
+#define err(format, arg...) printk(KERN_ERR TS_NAME ": " format "\n" , ## arg)
|
|
+#define info(format, arg...) printk(KERN_INFO TS_NAME ": " format "\n" , ## arg)
|
|
+#define warn(format, arg...) printk(KERN_WARNING TS_NAME ": " format "\n" , ## arg)
|
|
+
|
|
+/*
|
|
+ * Module parameters
|
|
+ */
|
|
+
|
|
+/*
|
|
+ * Set internal pull up for pen detect.
|
|
+ *
|
|
+ * Pull up is in the range 1.02k (least sensitive) to 64k (most sensitive)
|
|
+ * i.e. pull up resistance = 64k Ohms / rpu.
|
|
+ *
|
|
+ * Adjust this value if you are having problems with pen detect not
|
|
+ * detecting any down event.
|
|
+ */
|
|
+static int rpu = 3;
|
|
+module_param(rpu, int, 0);
|
|
+MODULE_PARM_DESC(rpu, "Set internal pull up resitor for pen detect.");
|
|
+
|
|
+/*
|
|
+ * Set current used for pressure measurement.
|
|
+ *
|
|
+ * Set pil = 2 to use 400uA
|
|
+ * pil = 1 to use 200uA and
|
|
+ * pil = 0 to disable pressure measurement.
|
|
+ *
|
|
+ * This is used to increase the range of values returned by the adc
|
|
+ * when measureing touchpanel pressure.
|
|
+ */
|
|
+static int pil = 0;
|
|
+module_param(pil, int, 0);
|
|
+MODULE_PARM_DESC(pil, "Set current used for pressure measurement.");
|
|
+
|
|
+/*
|
|
+ * Set threshold for pressure measurement.
|
|
+ *
|
|
+ * Pen down pressure below threshold is ignored.
|
|
+ */
|
|
+static int pressure = DEFAULT_PRESSURE & 0xfff;
|
|
+module_param(pressure, int, 0);
|
|
+MODULE_PARM_DESC(pressure, "Set threshold for pressure measurement.");
|
|
+
|
|
+/*
|
|
+ * Set adc sample delay.
|
|
+ *
|
|
+ * For accurate touchpanel measurements, some settling time may be
|
|
+ * required between the switch matrix applying a voltage across the
|
|
+ * touchpanel plate and the ADC sampling the signal.
|
|
+ *
|
|
+ * This delay can be set by setting delay = n, where n is the array
|
|
+ * position of the delay in the array delay_table below.
|
|
+ * Long delays > 1ms are supported for completeness, but are not
|
|
+ * recommended.
|
|
+ */
|
|
+static int delay = 3;
|
|
+module_param(delay, int, 0);
|
|
+MODULE_PARM_DESC(delay, "Set adc sample delay.");
|
|
+
|
|
+/*
|
|
+ * Set five_wire = 1 to use a 5 wire touchscreen.
|
|
+ *
|
|
+ * NOTE: Five wire mode does not allow for readback of pressure.
|
|
+ */
|
|
+static int five_wire;
|
|
+module_param(five_wire, int, 0);
|
|
+MODULE_PARM_DESC(five_wire, "Set to '1' to use 5-wire touchscreen.");
|
|
+
|
|
+/*
|
|
+ * Set adc mask function.
|
|
+ *
|
|
+ * Sources of glitch noise, such as signals driving an LCD display, may feed
|
|
+ * through to the touch screen plates and affect measurement accuracy. In
|
|
+ * order to minimise this, a signal may be applied to the MASK pin to delay or
|
|
+ * synchronise the sampling.
|
|
+ *
|
|
+ * 0 = No delay or sync
|
|
+ * 1 = High on pin stops conversions
|
|
+ * 2 = Edge triggered, edge on pin delays conversion by delay param (above)
|
|
+ * 3 = Edge triggered, edge on pin starts conversion after delay param
|
|
+ */
|
|
+static int mask = 0;
|
|
+module_param(mask, int, 0);
|
|
+MODULE_PARM_DESC(mask, "Set adc mask function.");
|
|
+
|
|
+/*
|
|
+ * Coordinate Polling Enable.
|
|
+ *
|
|
+ * Set to 1 to enable coordinate polling. e.g. x,y[,p] is sampled together
|
|
+ * for every poll.
|
|
+ */
|
|
+static int coord = 0;
|
|
+module_param(coord, int, 0);
|
|
+MODULE_PARM_DESC(coord, "Polling coordinate mode");
|
|
+
|
|
+/*
|
|
+ * ADC sample delay times in uS
|
|
+ */
|
|
+static const int delay_table[] = {
|
|
+ 21, // 1 AC97 Link frames
|
|
+ 42, // 2
|
|
+ 84, // 4
|
|
+ 167, // 8
|
|
+ 333, // 16
|
|
+ 667, // 32
|
|
+ 1000, // 48
|
|
+ 1333, // 64
|
|
+ 2000, // 96
|
|
+ 2667, // 128
|
|
+ 3333, // 160
|
|
+ 4000, // 192
|
|
+ 4667, // 224
|
|
+ 5333, // 256
|
|
+ 6000, // 288
|
|
+ 0 // No delay, switch matrix always on
|
|
+};
|
|
+
|
|
+/*
|
|
+ * Delay after issuing a POLL command.
|
|
+ *
|
|
+ * The delay is 3 AC97 link frames + the touchpanel settling delay
|
|
+ */
|
|
+static inline void poll_delay(int d)
|
|
+{
|
|
+ udelay (3 * AC97_LINK_FRAME + delay_table [d]);
|
|
+}
|
|
+
|
|
+/*
|
|
+ * set up the physical settings of the WM9712
|
|
+ */
|
|
+static void init_wm9712_phy(struct wm97xx* wm)
|
|
+{
|
|
+ u16 dig1 = 0;
|
|
+ u16 dig2 = WM97XX_RPR | WM9712_RPU(1);
|
|
+
|
|
+ /* WM9712 rpu */
|
|
+ if (rpu) {
|
|
+ dig2 &= 0xffc0;
|
|
+ dig2 |= WM9712_RPU(rpu);
|
|
+ dbg("setting pen detect pull-up to %d Ohms",64000 / rpu);
|
|
+ }
|
|
+
|
|
+ /* touchpanel pressure current*/
|
|
+ if (pil == 2) {
|
|
+ dig2 |= WM9712_PIL;
|
|
+ dbg("setting pressure measurement current to 400uA.");
|
|
+ } else if (pil)
|
|
+ dbg("setting pressure measurement current to 200uA.");
|
|
+ if(!pil)
|
|
+ pressure = 0;
|
|
+
|
|
+ /* WM9712 five wire */
|
|
+ if (five_wire) {
|
|
+ dig2 |= WM9712_45W;
|
|
+ dbg("setting 5-wire touchscreen mode.");
|
|
+ }
|
|
+
|
|
+ /* polling mode sample settling delay */
|
|
+ if (delay < 0 || delay > 15) {
|
|
+ dbg("supplied delay out of range.");
|
|
+ delay = 4;
|
|
+ }
|
|
+ dig1 &= 0xff0f;
|
|
+ dig1 |= WM97XX_DELAY(delay);
|
|
+ dbg("setting adc sample delay to %d u Secs.", delay_table[delay]);
|
|
+
|
|
+ /* mask */
|
|
+ dig2 |= ((mask & 0x3) << 6);
|
|
+ if (mask) {
|
|
+ u16 reg;
|
|
+ /* Set GPIO4 as Mask Pin*/
|
|
+ reg = wm97xx_reg_read(wm, AC97_MISC_AFE);
|
|
+ wm97xx_reg_write(wm, AC97_MISC_AFE, reg | WM97XX_GPIO_4);
|
|
+ reg = wm97xx_reg_read(wm, AC97_GPIO_CFG);
|
|
+ wm97xx_reg_write(wm, AC97_GPIO_CFG, reg | WM97XX_GPIO_4);
|
|
+ }
|
|
+
|
|
+ /* wait - coord mode */
|
|
+ if(coord)
|
|
+ dig2 |= WM9712_WAIT;
|
|
+
|
|
+ wm97xx_reg_write(wm, AC97_WM97XX_DIGITISER1, dig1);
|
|
+ wm97xx_reg_write(wm, AC97_WM97XX_DIGITISER2, dig2);
|
|
+}
|
|
+
|
|
+static int wm9712_digitiser_ioctl(struct wm97xx* wm, int cmd)
|
|
+{
|
|
+ u16 dig2 = wm->dig[2];
|
|
+
|
|
+ switch(cmd) {
|
|
+ case WM97XX_DIG_START:
|
|
+ wm97xx_reg_write(wm, AC97_WM97XX_DIGITISER2, dig2 | WM97XX_PRP_DET_DIG);
|
|
+ wm97xx_reg_read(wm, AC97_WM97XX_DIGITISER_RD); /* dummy read */
|
|
+ break;
|
|
+ case WM97XX_DIG_STOP:
|
|
+ wm97xx_reg_write(wm, AC97_WM97XX_DIGITISER2, dig2 & ~WM97XX_PRP_DET_DIG);
|
|
+ break;
|
|
+ case WM97XX_AUX_PREPARE:
|
|
+ memcpy(wm->dig_save, wm->dig, sizeof(wm->dig));
|
|
+ wm97xx_reg_write(wm, AC97_WM97XX_DIGITISER1, 0);
|
|
+ wm97xx_reg_write(wm, AC97_WM97XX_DIGITISER2, WM97XX_PRP_DET_DIG);
|
|
+ break;
|
|
+ case WM97XX_DIG_RESTORE:
|
|
+ wm97xx_reg_write(wm, AC97_WM97XX_DIGITISER1, wm->dig_save[1]);
|
|
+ wm97xx_reg_write(wm, AC97_WM97XX_DIGITISER2, wm->dig_save[2]);
|
|
+ break;
|
|
+ case WM97XX_PHY_INIT:
|
|
+ init_wm9712_phy(wm);
|
|
+ break;
|
|
+ default:
|
|
+ return -EINVAL;
|
|
+ }
|
|
+ return 0;
|
|
+}
|
|
+
|
|
+static inline int is_pden (struct wm97xx* wm)
|
|
+{
|
|
+ return wm->dig[2] & WM9712_PDEN;
|
|
+}
|
|
+
|
|
+/*
|
|
+ * Read a sample from the WM9712 adc in polling mode.
|
|
+ */
|
|
+static int wm9712_poll_sample (struct wm97xx* wm, int adcsel, int *sample)
|
|
+{
|
|
+ int timeout = 5 * delay;
|
|
+
|
|
+ if (!wm->pen_probably_down) {
|
|
+ u16 data = wm97xx_reg_read(wm, AC97_WM97XX_DIGITISER_RD);
|
|
+ if (!(data & WM97XX_PEN_DOWN))
|
|
+ return RC_PENUP;
|
|
+ wm->pen_probably_down = 1;
|
|
+ }
|
|
+
|
|
+ /* set up digitiser */
|
|
+ if (adcsel & 0x8000)
|
|
+ adcsel = ((adcsel & 0x7fff) + 3) << 12;
|
|
+
|
|
+ if (wm->mach_ops && wm->mach_ops->pre_sample)
|
|
+ wm->mach_ops->pre_sample(adcsel);
|
|
+ wm97xx_reg_write(wm, AC97_WM97XX_DIGITISER1, adcsel | WM97XX_POLL | WM97XX_DELAY(delay));
|
|
+
|
|
+ /* wait 3 AC97 time slots + delay for conversion */
|
|
+ poll_delay (delay);
|
|
+
|
|
+ /* wait for POLL to go low */
|
|
+ while ((wm97xx_reg_read(wm, AC97_WM97XX_DIGITISER1) & WM97XX_POLL) && timeout) {
|
|
+ udelay(AC97_LINK_FRAME);
|
|
+ timeout--;
|
|
+ }
|
|
+
|
|
+ if (timeout <= 0) {
|
|
+ /* If PDEN is set, we can get a timeout when pen goes up */
|
|
+ if (is_pden(wm))
|
|
+ wm->pen_probably_down = 0;
|
|
+ else
|
|
+ dbg ("adc sample timeout");
|
|
+ return RC_PENUP;
|
|
+ }
|
|
+
|
|
+ *sample = wm97xx_reg_read(wm, AC97_WM97XX_DIGITISER_RD);
|
|
+ if (wm->mach_ops && wm->mach_ops->post_sample)
|
|
+ wm->mach_ops->post_sample(adcsel);
|
|
+
|
|
+ /* check we have correct sample */
|
|
+ if ((*sample & WM97XX_ADCSEL_MASK) != adcsel) {
|
|
+ dbg ("adc wrong sample, read %x got %x", adcsel,
|
|
+ *sample & WM97XX_ADCSEL_MASK);
|
|
+ return RC_PENUP;
|
|
+ }
|
|
+
|
|
+ if (!(*sample & WM97XX_PEN_DOWN)) {
|
|
+ wm->pen_probably_down = 0;
|
|
+ return RC_PENUP;
|
|
+ }
|
|
+
|
|
+ return RC_VALID;
|
|
+}
|
|
+
|
|
+/*
|
|
+ * Read a coord from the WM9712 adc in polling mode.
|
|
+ */
|
|
+static int wm9712_poll_coord (struct wm97xx* wm, struct wm97xx_data *data)
|
|
+{
|
|
+ int timeout = 5 * delay;
|
|
+
|
|
+ if (!wm->pen_probably_down) {
|
|
+ u16 data = wm97xx_reg_read(wm, AC97_WM97XX_DIGITISER_RD);
|
|
+ if (!(data & WM97XX_PEN_DOWN))
|
|
+ return RC_PENUP;
|
|
+ wm->pen_probably_down = 1;
|
|
+ }
|
|
+
|
|
+ /* set up digitiser */
|
|
+ if (wm->mach_ops && wm->mach_ops->pre_sample)
|
|
+ wm->mach_ops->pre_sample(WM97XX_ADCSEL_X | WM97XX_ADCSEL_Y);
|
|
+
|
|
+ wm97xx_reg_write(wm, AC97_WM97XX_DIGITISER1,
|
|
+ WM97XX_COO | WM97XX_POLL | WM97XX_DELAY(delay));
|
|
+
|
|
+ /* wait 3 AC97 time slots + delay for conversion and read x */
|
|
+ poll_delay(delay);
|
|
+ data->x = wm97xx_reg_read(wm, AC97_WM97XX_DIGITISER_RD);
|
|
+ /* wait for POLL to go low */
|
|
+ while ((wm97xx_reg_read(wm, AC97_WM97XX_DIGITISER1) & WM97XX_POLL) && timeout) {
|
|
+ udelay(AC97_LINK_FRAME);
|
|
+ timeout--;
|
|
+ }
|
|
+
|
|
+ if (timeout <= 0) {
|
|
+ /* If PDEN is set, we can get a timeout when pen goes up */
|
|
+ if (is_pden(wm))
|
|
+ wm->pen_probably_down = 0;
|
|
+ else
|
|
+ dbg ("adc sample timeout");
|
|
+ return RC_PENUP;
|
|
+ }
|
|
+
|
|
+ /* read back y data */
|
|
+ data->y = wm97xx_reg_read(wm, AC97_WM97XX_DIGITISER_RD);
|
|
+ if (pil)
|
|
+ data->p = wm97xx_reg_read(wm, AC97_WM97XX_DIGITISER_RD);
|
|
+ else
|
|
+ data->p = DEFAULT_PRESSURE;
|
|
+
|
|
+ if (wm->mach_ops && wm->mach_ops->post_sample)
|
|
+ wm->mach_ops->post_sample(WM97XX_ADCSEL_X | WM97XX_ADCSEL_Y);
|
|
+
|
|
+ /* check we have correct sample */
|
|
+ if (!(data->x & WM97XX_ADCSEL_X) || !(data->y & WM97XX_ADCSEL_Y))
|
|
+ goto err;
|
|
+ if(pil && !(data->p & WM97XX_ADCSEL_PRES))
|
|
+ goto err;
|
|
+
|
|
+ if (!(data->x & WM97XX_PEN_DOWN)) {
|
|
+ wm->pen_probably_down = 0;
|
|
+ return RC_PENUP;
|
|
+ }
|
|
+ return RC_VALID;
|
|
+err:
|
|
+ return RC_PENUP;
|
|
+}
|
|
+
|
|
+/*
|
|
+ * Sample the WM9712 touchscreen in polling mode
|
|
+ */
|
|
+static int wm9712_poll_touch(struct wm97xx* wm, struct wm97xx_data *data)
|
|
+{
|
|
+ int rc;
|
|
+
|
|
+ if(coord) {
|
|
+ if((rc = wm9712_poll_coord(wm, data)) != RC_VALID)
|
|
+ return rc;
|
|
+ } else {
|
|
+ if ((rc = wm9712_poll_sample(wm, WM97XX_ADCSEL_X, &data->x)) != RC_VALID)
|
|
+ return rc;
|
|
+
|
|
+ if ((rc = wm9712_poll_sample(wm, WM97XX_ADCSEL_Y, &data->y)) != RC_VALID)
|
|
+ return rc;
|
|
+
|
|
+ if (pil && !five_wire) {
|
|
+ if ((rc = wm9712_poll_sample(wm, WM97XX_ADCSEL_PRES, &data->p)) != RC_VALID)
|
|
+ return rc;
|
|
+ } else
|
|
+ data->p = DEFAULT_PRESSURE;
|
|
+ }
|
|
+ return RC_VALID;
|
|
+}
|
|
+
|
|
+/*
|
|
+ * Enable WM9712 continuous mode, i.e. touch data is streamed across an AC97 slot
|
|
+ */
|
|
+static int wm9712_acc_enable (struct wm97xx* wm, int enable)
|
|
+{
|
|
+ u16 dig1, dig2;
|
|
+ int ret = 0;
|
|
+
|
|
+ dig1 = wm->dig[1];
|
|
+ dig2 = wm->dig[2];
|
|
+
|
|
+ if (enable) {
|
|
+ /* continous mode */
|
|
+ if (wm->mach_ops->acc_startup && (ret = wm->mach_ops->acc_startup(wm)) < 0)
|
|
+ return ret;
|
|
+ dig1 &= ~(WM97XX_CM_RATE_MASK | WM97XX_ADCSEL_MASK |
|
|
+ WM97XX_DELAY_MASK | WM97XX_SLT_MASK);
|
|
+ dig1 |= WM97XX_CTC | WM97XX_COO | WM97XX_SLEN |
|
|
+ WM97XX_DELAY (delay) |
|
|
+ WM97XX_SLT (wm->acc_slot) |
|
|
+ WM97XX_RATE (wm->acc_rate);
|
|
+ if (pil)
|
|
+ dig1 |= WM97XX_ADCSEL_PRES;
|
|
+ dig2 |= WM9712_PDEN;
|
|
+ } else {
|
|
+ dig1 &= ~(WM97XX_CTC | WM97XX_COO | WM97XX_SLEN);
|
|
+ dig2 &= ~WM9712_PDEN;
|
|
+ if (wm->mach_ops->acc_shutdown)
|
|
+ wm->mach_ops->acc_shutdown(wm);
|
|
+ }
|
|
+
|
|
+ wm97xx_reg_write(wm, AC97_WM97XX_DIGITISER1, dig1);
|
|
+ wm97xx_reg_write(wm, AC97_WM97XX_DIGITISER2, dig2);
|
|
+ return 0;
|
|
+}
|
|
+
|
|
+struct wm97xx_codec_drv wm97xx_codec = {
|
|
+ .id = WM9712_ID2,
|
|
+ .name = "wm9712",
|
|
+ .poll_sample = wm9712_poll_sample,
|
|
+ .poll_touch = wm9712_poll_touch,
|
|
+ .acc_enable = wm9712_acc_enable,
|
|
+ .digitiser_ioctl = wm9712_digitiser_ioctl,
|
|
+};
|
|
+
|
|
+EXPORT_SYMBOL_GPL(wm97xx_codec);
|
|
+
|
|
+/* Module information */
|
|
+MODULE_AUTHOR("Liam Girdwood, liam.girdwood@wolfsonmicro.com, www.wolfsonmicro.com");
|
|
+MODULE_DESCRIPTION("WM9712 Touch Screen Driver");
|
|
+MODULE_LICENSE("GPL");
|
|
Index: linux-2.6.17/drivers/input/touchscreen/wm9713.c
|
|
===================================================================
|
|
--- /dev/null 1970-01-01 00:00:00.000000000 +0000
|
|
+++ linux-2.6.17/drivers/input/touchscreen/wm9713.c 2006-09-19 20:36:47.969052000 +0200
|
|
@@ -0,0 +1,461 @@
|
|
+/*
|
|
+ * wm9713.c -- Codec touch driver for Wolfson WM9713 AC97 Codec.
|
|
+ *
|
|
+ * Copyright 2003, 2004, 2005, 2006 Wolfson Microelectronics PLC.
|
|
+ * Author: Liam Girdwood
|
|
+ * liam.girdwood@wolfsonmicro.com or linux@wolfsonmicro.com
|
|
+ * Parts Copyright : Ian Molton <spyro@f2s.com>
|
|
+ * Andrew Zabolotny <zap@homelink.ru>
|
|
+ * Russell King <rmk@arm.linux.org.uk>
|
|
+ *
|
|
+ * This program is free software; you can redistribute it and/or modify it
|
|
+ * under the terms of the GNU General Public License as published by the
|
|
+ * Free Software Foundation; either version 2 of the License, or (at your
|
|
+ * option) any later version.
|
|
+ *
|
|
+ * Revision history
|
|
+ * 6th Sep 2006 Mike Arthur <linux@wolfsonmicro.com>
|
|
+ * Added pre and post sample calls.
|
|
+ *
|
|
+ */
|
|
+
|
|
+#include <linux/module.h>
|
|
+#include <linux/moduleparam.h>
|
|
+#include <linux/version.h>
|
|
+#include <linux/kernel.h>
|
|
+#include <linux/input.h>
|
|
+#include <linux/delay.h>
|
|
+#include <linux/bitops.h>
|
|
+#include <linux/wm97xx.h>
|
|
+
|
|
+#define TS_NAME "wm97xx"
|
|
+#define WM9713_VERSION "0.53"
|
|
+#define DEFAULT_PRESSURE 0xb0c0
|
|
+
|
|
+/*
|
|
+ * Debug
|
|
+ */
|
|
+#if 0
|
|
+#define dbg(format, arg...) printk(KERN_DEBUG TS_NAME ": " format "\n" , ## arg)
|
|
+#else
|
|
+#define dbg(format, arg...)
|
|
+#endif
|
|
+#define err(format, arg...) printk(KERN_ERR TS_NAME ": " format "\n" , ## arg)
|
|
+#define info(format, arg...) printk(KERN_INFO TS_NAME ": " format "\n" , ## arg)
|
|
+#define warn(format, arg...) printk(KERN_WARNING TS_NAME ": " format "\n" , ## arg)
|
|
+
|
|
+/*
|
|
+ * Module parameters
|
|
+ */
|
|
+
|
|
+/*
|
|
+ * Set internal pull up for pen detect.
|
|
+ *
|
|
+ * Pull up is in the range 1.02k (least sensitive) to 64k (most sensitive)
|
|
+ * i.e. pull up resistance = 64k Ohms / rpu.
|
|
+ *
|
|
+ * Adjust this value if you are having problems with pen detect not
|
|
+ * detecting any down event.
|
|
+ */
|
|
+static int rpu = 1;
|
|
+module_param(rpu, int, 0);
|
|
+MODULE_PARM_DESC(rpu, "Set internal pull up resitor for pen detect.");
|
|
+
|
|
+/*
|
|
+ * Set current used for pressure measurement.
|
|
+ *
|
|
+ * Set pil = 2 to use 400uA
|
|
+ * pil = 1 to use 200uA and
|
|
+ * pil = 0 to disable pressure measurement.
|
|
+ *
|
|
+ * This is used to increase the range of values returned by the adc
|
|
+ * when measureing touchpanel pressure.
|
|
+ */
|
|
+static int pil = 0;
|
|
+module_param(pil, int, 0);
|
|
+MODULE_PARM_DESC(pil, "Set current used for pressure measurement.");
|
|
+
|
|
+/*
|
|
+ * Set threshold for pressure measurement.
|
|
+ *
|
|
+ * Pen down pressure below threshold is ignored.
|
|
+ */
|
|
+static int pressure = DEFAULT_PRESSURE & 0xfff;
|
|
+module_param(pressure, int, 0);
|
|
+MODULE_PARM_DESC(pressure, "Set threshold for pressure measurement.");
|
|
+
|
|
+/*
|
|
+ * Set adc sample delay.
|
|
+ *
|
|
+ * For accurate touchpanel measurements, some settling time may be
|
|
+ * required between the switch matrix applying a voltage across the
|
|
+ * touchpanel plate and the ADC sampling the signal.
|
|
+ *
|
|
+ * This delay can be set by setting delay = n, where n is the array
|
|
+ * position of the delay in the array delay_table below.
|
|
+ * Long delays > 1ms are supported for completeness, but are not
|
|
+ * recommended.
|
|
+ */
|
|
+static int delay = 4;
|
|
+module_param(delay, int, 0);
|
|
+MODULE_PARM_DESC(delay, "Set adc sample delay.");
|
|
+
|
|
+/*
|
|
+ * Set adc mask function.
|
|
+ *
|
|
+ * Sources of glitch noise, such as signals driving an LCD display, may feed
|
|
+ * through to the touch screen plates and affect measurement accuracy. In
|
|
+ * order to minimise this, a signal may be applied to the MASK pin to delay or
|
|
+ * synchronise the sampling.
|
|
+ *
|
|
+ * 0 = No delay or sync
|
|
+ * 1 = High on pin stops conversions
|
|
+ * 2 = Edge triggered, edge on pin delays conversion by delay param (above)
|
|
+ * 3 = Edge triggered, edge on pin starts conversion after delay param
|
|
+ */
|
|
+static int mask = 0;
|
|
+module_param(mask, int, 0);
|
|
+MODULE_PARM_DESC(mask, "Set adc mask function.");
|
|
+
|
|
+/*
|
|
+ * Coordinate Polling Enable.
|
|
+ *
|
|
+ * Set to 1 to enable coordinate polling. e.g. x,y[,p] is sampled together
|
|
+ * for every poll.
|
|
+ */
|
|
+static int coord = 1;
|
|
+module_param(coord, int, 0);
|
|
+MODULE_PARM_DESC(coord, "Polling coordinate mode");
|
|
+
|
|
+/*
|
|
+ * ADC sample delay times in uS
|
|
+ */
|
|
+static const int delay_table[] = {
|
|
+ 21, // 1 AC97 Link frames
|
|
+ 42, // 2
|
|
+ 84, // 4
|
|
+ 167, // 8
|
|
+ 333, // 16
|
|
+ 667, // 32
|
|
+ 1000, // 48
|
|
+ 1333, // 64
|
|
+ 2000, // 96
|
|
+ 2667, // 128
|
|
+ 3333, // 160
|
|
+ 4000, // 192
|
|
+ 4667, // 224
|
|
+ 5333, // 256
|
|
+ 6000, // 288
|
|
+ 0 // No delay, switch matrix always on
|
|
+};
|
|
+
|
|
+/*
|
|
+ * Delay after issuing a POLL command.
|
|
+ *
|
|
+ * The delay is 3 AC97 link frames + the touchpanel settling delay
|
|
+ */
|
|
+static inline void poll_delay(int d)
|
|
+{
|
|
+ udelay (3 * AC97_LINK_FRAME + delay_table [d]);
|
|
+}
|
|
+
|
|
+/*
|
|
+ * set up the physical settings of the WM9713
|
|
+ */
|
|
+static void init_wm9713_phy(struct wm97xx* wm)
|
|
+{
|
|
+ u16 dig1 = 0, dig2, dig3;
|
|
+
|
|
+ /* default values */
|
|
+ dig2 = WM97XX_DELAY(4) | WM97XX_SLT(5);
|
|
+ dig3= WM9712_RPU(1);
|
|
+
|
|
+ /* rpu */
|
|
+ if (rpu) {
|
|
+ dig3 &= 0xffc0;
|
|
+ dig3 |= WM9712_RPU(rpu);
|
|
+ info("setting pen detect pull-up to %d Ohms",64000 / rpu);
|
|
+ }
|
|
+
|
|
+ /* touchpanel pressure */
|
|
+ if (pil == 2) {
|
|
+ dig3 |= WM9712_PIL;
|
|
+ info("setting pressure measurement current to 400uA.");
|
|
+ } else if (pil)
|
|
+ info ("setting pressure measurement current to 200uA.");
|
|
+ if(!pil)
|
|
+ pressure = 0;
|
|
+
|
|
+ /* sample settling delay */
|
|
+ if (delay < 0 || delay > 15) {
|
|
+ info ("supplied delay out of range.");
|
|
+ delay = 4;
|
|
+ info("setting adc sample delay to %d u Secs.", delay_table[delay]);
|
|
+ }
|
|
+ dig2 &= 0xff0f;
|
|
+ dig2 |= WM97XX_DELAY(delay);
|
|
+
|
|
+ /* mask */
|
|
+ dig3 |= ((mask & 0x3) << 4);
|
|
+ if(coord)
|
|
+ dig3 |= WM9713_WAIT;
|
|
+
|
|
+ wm->misc = wm97xx_reg_read(wm, 0x5a);
|
|
+
|
|
+ wm97xx_reg_write(wm, AC97_WM9713_DIG1, dig1);
|
|
+ wm97xx_reg_write(wm, AC97_WM9713_DIG2, dig2);
|
|
+ wm97xx_reg_write(wm, AC97_WM9713_DIG3, dig3);
|
|
+ wm97xx_reg_write(wm, AC97_GPIO_STICKY, 0x0);
|
|
+}
|
|
+
|
|
+static int wm9713_digitiser_ioctl(struct wm97xx* wm, int cmd)
|
|
+{
|
|
+ u16 val = 0;
|
|
+
|
|
+ switch(cmd){
|
|
+ case WM97XX_DIG_START:
|
|
+ val = wm97xx_reg_read(wm, AC97_EXTENDED_MID);
|
|
+ wm97xx_reg_write(wm, AC97_EXTENDED_MID, val & 0x7fff);
|
|
+ wm97xx_reg_write(wm, AC97_WM9713_DIG3, wm->dig[2] | WM97XX_PRP_DET_DIG);
|
|
+ wm97xx_reg_read(wm, AC97_WM97XX_DIGITISER_RD); /* dummy read */
|
|
+ break;
|
|
+ case WM97XX_DIG_STOP:
|
|
+ wm97xx_reg_write(wm, AC97_WM9713_DIG3, wm->dig[2] & ~WM97XX_PRP_DET_DIG);
|
|
+ val = wm97xx_reg_read(wm, AC97_EXTENDED_MID);
|
|
+ wm97xx_reg_write(wm, AC97_EXTENDED_MID, val | 0x8000);
|
|
+ break;
|
|
+ case WM97XX_AUX_PREPARE:
|
|
+ memcpy(wm->dig_save, wm->dig, sizeof(wm->dig));
|
|
+ wm97xx_reg_write(wm, AC97_WM9713_DIG1, 0);
|
|
+ wm97xx_reg_write(wm, AC97_WM9713_DIG2, 0);
|
|
+ wm97xx_reg_write(wm, AC97_WM9713_DIG3, WM97XX_PRP_DET_DIG);
|
|
+ break;
|
|
+ case WM97XX_DIG_RESTORE:
|
|
+ wm97xx_reg_write(wm, AC97_WM9713_DIG1, wm->dig_save[0]);
|
|
+ wm97xx_reg_write(wm, AC97_WM9713_DIG2, wm->dig_save[1]);
|
|
+ wm97xx_reg_write(wm, AC97_WM9713_DIG3, wm->dig_save[2]);
|
|
+ break;
|
|
+ case WM97XX_PHY_INIT:
|
|
+ init_wm9713_phy(wm);
|
|
+ break;
|
|
+ default:
|
|
+ return -EINVAL;
|
|
+ }
|
|
+ return 0;
|
|
+}
|
|
+
|
|
+static inline int is_pden (struct wm97xx* wm)
|
|
+{
|
|
+ return wm->dig[2] & WM9713_PDEN;
|
|
+}
|
|
+
|
|
+/*
|
|
+ * Read a sample from the WM9713 adc in polling mode.
|
|
+ */
|
|
+static int wm9713_poll_sample (struct wm97xx* wm, int adcsel, int *sample)
|
|
+{
|
|
+ u16 dig1;
|
|
+ int timeout = 5 * delay;
|
|
+
|
|
+ if (!wm->pen_probably_down) {
|
|
+ u16 data = wm97xx_reg_read(wm, AC97_WM97XX_DIGITISER_RD);
|
|
+ if (!(data & WM97XX_PEN_DOWN))
|
|
+ return RC_PENUP;
|
|
+ wm->pen_probably_down = 1;
|
|
+ }
|
|
+
|
|
+ /* set up digitiser */
|
|
+ if (adcsel & 0x8000)
|
|
+ adcsel = 1 << ((adcsel & 0x7fff) + 3);
|
|
+
|
|
+ dig1 = wm97xx_reg_read(wm, AC97_WM9713_DIG1);
|
|
+ dig1 &= ~WM9713_ADCSEL_MASK;
|
|
+
|
|
+ if (wm->mach_ops && wm->mach_ops->pre_sample)
|
|
+ wm->mach_ops->pre_sample(adcsel);
|
|
+ wm97xx_reg_write(wm, AC97_WM9713_DIG1, dig1 | adcsel |WM9713_POLL);
|
|
+
|
|
+ /* wait 3 AC97 time slots + delay for conversion */
|
|
+ poll_delay(delay);
|
|
+
|
|
+ /* wait for POLL to go low */
|
|
+ while ((wm97xx_reg_read(wm, AC97_WM9713_DIG1) & WM9713_POLL) && timeout) {
|
|
+ udelay(AC97_LINK_FRAME);
|
|
+ timeout--;
|
|
+ }
|
|
+
|
|
+ if (timeout <= 0) {
|
|
+ /* If PDEN is set, we can get a timeout when pen goes up */
|
|
+ if (is_pden(wm))
|
|
+ wm->pen_probably_down = 0;
|
|
+ else
|
|
+ dbg ("adc sample timeout");
|
|
+ return RC_PENUP;
|
|
+ }
|
|
+
|
|
+ *sample =wm97xx_reg_read(wm, AC97_WM97XX_DIGITISER_RD);
|
|
+ if (wm->mach_ops && wm->mach_ops->post_sample)
|
|
+ wm->mach_ops->post_sample(adcsel);
|
|
+
|
|
+ /* check we have correct sample */
|
|
+ if ((*sample & WM97XX_ADCSRC_MASK) != ffs(adcsel >> 1) << 12) {
|
|
+ dbg ("adc wrong sample, read %x got %x", adcsel,
|
|
+ *sample & WM97XX_ADCSRC_MASK);
|
|
+ return RC_PENUP;
|
|
+ }
|
|
+
|
|
+ if (!(*sample & WM97XX_PEN_DOWN)) {
|
|
+ wm->pen_probably_down = 0;
|
|
+ return RC_PENUP;
|
|
+ }
|
|
+
|
|
+ return RC_VALID;
|
|
+}
|
|
+
|
|
+/*
|
|
+ * Read a coordinate from the WM9713 adc in polling mode.
|
|
+ */
|
|
+static int wm9713_poll_coord (struct wm97xx* wm, struct wm97xx_data *data)
|
|
+{
|
|
+ u16 dig1;
|
|
+ int timeout = 5 * delay;
|
|
+
|
|
+ if (!wm->pen_probably_down) {
|
|
+ u16 data = wm97xx_reg_read(wm, AC97_WM97XX_DIGITISER_RD);
|
|
+ if (!(data & WM97XX_PEN_DOWN))
|
|
+ return RC_PENUP;
|
|
+ wm->pen_probably_down = 1;
|
|
+ }
|
|
+
|
|
+ /* set up digitiser */
|
|
+ dig1 = wm97xx_reg_read(wm, AC97_WM9713_DIG1);
|
|
+ dig1 &= ~WM9713_ADCSEL_MASK;
|
|
+ if(pil)
|
|
+ dig1 |= WM97XX_ADCSEL_PRES;
|
|
+
|
|
+ if (wm->mach_ops && wm->mach_ops->pre_sample)
|
|
+ wm->mach_ops->pre_sample(WM97XX_ADCSEL_X | WM97XX_ADCSEL_Y);
|
|
+ wm97xx_reg_write(wm, AC97_WM9713_DIG1, dig1 | WM9713_POLL | WM9713_COO);
|
|
+
|
|
+ /* wait 3 AC97 time slots + delay for conversion */
|
|
+ poll_delay(delay);
|
|
+ data->x = wm97xx_reg_read(wm, AC97_WM97XX_DIGITISER_RD);
|
|
+ /* wait for POLL to go low */
|
|
+ while ((wm97xx_reg_read(wm, AC97_WM9713_DIG1) & WM9713_POLL) && timeout) {
|
|
+ udelay(AC97_LINK_FRAME);
|
|
+ timeout--;
|
|
+ }
|
|
+
|
|
+ if (timeout <= 0) {
|
|
+ /* If PDEN is set, we can get a timeout when pen goes up */
|
|
+ if (is_pden(wm))
|
|
+ wm->pen_probably_down = 0;
|
|
+ else
|
|
+ dbg ("adc sample timeout");
|
|
+ return RC_PENUP;
|
|
+ }
|
|
+
|
|
+ /* read back data */
|
|
+ data->y = wm97xx_reg_read(wm, AC97_WM97XX_DIGITISER_RD);
|
|
+ if (pil)
|
|
+ data->p = wm97xx_reg_read(wm, AC97_WM97XX_DIGITISER_RD);
|
|
+ else
|
|
+ data->p = DEFAULT_PRESSURE;
|
|
+
|
|
+ if (wm->mach_ops && wm->mach_ops->post_sample)
|
|
+ wm->mach_ops->post_sample(WM97XX_ADCSEL_X | WM97XX_ADCSEL_Y);
|
|
+
|
|
+ /* check we have correct sample */
|
|
+ if (!(data->x & WM97XX_ADCSEL_X) || !(data->y & WM97XX_ADCSEL_Y))
|
|
+ goto err;
|
|
+ if(pil && !(data->p & WM97XX_ADCSEL_PRES))
|
|
+ goto err;
|
|
+
|
|
+ if (!(data->x & WM97XX_PEN_DOWN)) {
|
|
+ wm->pen_probably_down = 0;
|
|
+ return RC_PENUP;
|
|
+ }
|
|
+ return RC_VALID;
|
|
+err:
|
|
+ return RC_PENUP;
|
|
+}
|
|
+
|
|
+/*
|
|
+ * Sample the WM9713 touchscreen in polling mode
|
|
+ */
|
|
+static int wm9713_poll_touch(struct wm97xx* wm, struct wm97xx_data *data)
|
|
+{
|
|
+ int rc;
|
|
+
|
|
+ if(coord) {
|
|
+ if((rc = wm9713_poll_coord(wm, data)) != RC_VALID)
|
|
+ return rc;
|
|
+ } else {
|
|
+ if ((rc = wm9713_poll_sample(wm, WM9713_ADCSEL_X, &data->x)) != RC_VALID)
|
|
+ return rc;
|
|
+ if ((rc = wm9713_poll_sample(wm, WM9713_ADCSEL_Y, &data->y)) != RC_VALID)
|
|
+ return rc;
|
|
+ if (pil) {
|
|
+ if ((rc = wm9713_poll_sample(wm, WM9713_ADCSEL_PRES, &data->p)) != RC_VALID)
|
|
+ return rc;
|
|
+ } else
|
|
+ data->p = DEFAULT_PRESSURE;
|
|
+ }
|
|
+ return RC_VALID;
|
|
+}
|
|
+
|
|
+/*
|
|
+ * Enable WM9713 continuous mode, i.e. touch data is streamed across an AC97 slot
|
|
+ */
|
|
+static int wm9713_acc_enable (struct wm97xx* wm, int enable)
|
|
+{
|
|
+ u16 dig1, dig2, dig3;
|
|
+ int ret = 0;
|
|
+
|
|
+ dig1 = wm->dig[0];
|
|
+ dig2 = wm->dig[1];
|
|
+ dig3 = wm->dig[2];
|
|
+
|
|
+ if (enable) {
|
|
+ /* continous mode */
|
|
+ if (wm->mach_ops->acc_startup &&
|
|
+ (ret = wm->mach_ops->acc_startup(wm)) < 0)
|
|
+ return ret;
|
|
+
|
|
+ dig1 &= ~WM9713_ADCSEL_MASK;
|
|
+ dig1 |= WM9713_CTC | WM9713_COO | WM9713_ADCSEL_X | WM9713_ADCSEL_Y;
|
|
+ if (pil)
|
|
+ dig1 |= WM9713_ADCSEL_PRES;
|
|
+ dig2 &= ~(WM97XX_DELAY_MASK | WM97XX_SLT_MASK | WM97XX_CM_RATE_MASK);
|
|
+ dig2 |= WM97XX_SLEN | WM97XX_DELAY (delay) |
|
|
+ WM97XX_SLT (wm->acc_slot) | WM97XX_RATE (wm->acc_rate);
|
|
+ dig3 |= WM9713_PDEN;
|
|
+ } else {
|
|
+ dig1 &= ~(WM9713_CTC | WM9713_COO);
|
|
+ dig2 &= ~WM97XX_SLEN;
|
|
+ dig3 &= ~WM9713_PDEN;
|
|
+ if (wm->mach_ops->acc_shutdown)
|
|
+ wm->mach_ops->acc_shutdown(wm);
|
|
+ }
|
|
+
|
|
+ wm97xx_reg_write(wm, AC97_WM9713_DIG1, dig1);
|
|
+ wm97xx_reg_write(wm, AC97_WM9713_DIG2, dig2);
|
|
+ wm97xx_reg_write(wm, AC97_WM9713_DIG3, dig3);
|
|
+ return ret;
|
|
+}
|
|
+
|
|
+struct wm97xx_codec_drv wm97xx_codec = {
|
|
+ .id = WM9713_ID2,
|
|
+ .name = "wm9713",
|
|
+ .poll_sample = wm9713_poll_sample,
|
|
+ .poll_touch = wm9713_poll_touch,
|
|
+ .acc_enable = wm9713_acc_enable,
|
|
+ .digitiser_ioctl = wm9713_digitiser_ioctl,
|
|
+};
|
|
+
|
|
+EXPORT_SYMBOL_GPL(wm97xx_codec);
|
|
+
|
|
+/* Module information */
|
|
+MODULE_AUTHOR("Liam Girdwood, liam.girdwood@wolfsonmicro.com, www.wolfsonmicro.com");
|
|
+MODULE_DESCRIPTION("WM9713 Touch Screen Driver");
|
|
+MODULE_LICENSE("GPL");
|
|
Index: linux-2.6.17/drivers/input/touchscreen/wm97xx-core.c
|
|
===================================================================
|
|
--- /dev/null 1970-01-01 00:00:00.000000000 +0000
|
|
+++ linux-2.6.17/drivers/input/touchscreen/wm97xx-core.c 2006-09-19 20:36:47.969052000 +0200
|
|
@@ -0,0 +1,912 @@
|
|
+/*
|
|
+ * wm97xx-core.c -- Touch screen driver core for Wolfson WM9705, WM9712
|
|
+ * and WM9713 AC97 Codecs.
|
|
+ *
|
|
+ * Copyright 2003, 2004, 2005, 2006 Wolfson Microelectronics PLC.
|
|
+ * Author: Liam Girdwood
|
|
+ * liam.girdwood@wolfsonmicro.com or linux@wolfsonmicro.com
|
|
+ * Parts Copyright : Ian Molton <spyro@f2s.com>
|
|
+ * Andrew Zabolotny <zap@homelink.ru>
|
|
+ * Russell King <rmk@arm.linux.org.uk>
|
|
+ *
|
|
+ * This program is free software; you can redistribute it and/or modify it
|
|
+ * under the terms of the GNU General Public License as published by the
|
|
+ * Free Software Foundation; either version 2 of the License, or (at your
|
|
+ * option) any later version.
|
|
+ *
|
|
+ * Notes:
|
|
+ *
|
|
+ * Features:
|
|
+ * - supports WM9705, WM9712, WM9713
|
|
+ * - polling mode
|
|
+ * - continuous mode (arch-dependent)
|
|
+ * - adjustable rpu/dpp settings
|
|
+ * - adjustable pressure current
|
|
+ * - adjustable sample settle delay
|
|
+ * - 4 and 5 wire touchscreens (5 wire is WM9712 only)
|
|
+ * - pen down detection
|
|
+ * - battery monitor
|
|
+ * - sample AUX adc's
|
|
+ * - power management
|
|
+ * - codec GPIO
|
|
+ * - codec event notification
|
|
+ * Todo
|
|
+ * - Support for async sampling control for noisy LCD's.
|
|
+ *
|
|
+ * Revision history
|
|
+ * 7th May 2003 Initial version.
|
|
+ * 6th June 2003 Added non module support and AC97 registration.
|
|
+ * 18th June 2003 Added AUX adc sampling.
|
|
+ * 23rd June 2003 Did some minimal reformatting, fixed a couple of
|
|
+ * codec_mutexing bugs and noted a race to fix.
|
|
+ * 24th June 2003 Added power management and fixed race condition.
|
|
+ * 10th July 2003 Changed to a misc device.
|
|
+ * 31st July 2003 Moved TS_EVENT and TS_CAL to wm97xx.h
|
|
+ * 8th Aug 2003 Added option for read() calling wm97xx_sample_touch()
|
|
+ * because some ac97_read/ac_97_write call schedule()
|
|
+ * 7th Nov 2003 Added Input touch event interface, stanley.cai@intel.com
|
|
+ * 13th Nov 2003 Removed h3600 touch interface, added interrupt based
|
|
+ * pen down notification and implemented continous mode
|
|
+ * on XScale arch.
|
|
+ * 16th Nov 2003 Ian Molton <spyro@f2s.com>
|
|
+ * Modified so that it suits the new 2.6 driver model.
|
|
+ * 25th Jan 2004 Andrew Zabolotny <zap@homelink.ru>
|
|
+ * Implemented IRQ-driven pen down detection, implemented
|
|
+ * the private API meant to be exposed to platform-specific
|
|
+ * drivers, reorganized the driver so that it supports
|
|
+ * an arbitrary number of devices.
|
|
+ * 1st Feb 2004 Moved continuous mode handling to a separate
|
|
+ * architecture-dependent file. For now only PXA
|
|
+ * built-in AC97 controller is supported (pxa-ac97-wm97xx.c).
|
|
+ * 11th Feb 2004 Reduced CPU usage by keeping a cached copy of both
|
|
+ * digitizer registers instead of reading them every time.
|
|
+ * A reorganization of the whole code for better
|
|
+ * error handling.
|
|
+ * 17th Apr 2004 Added BMON support.
|
|
+ * 17th Nov 2004 Added codec GPIO, codec event handling (real and virtual
|
|
+ * GPIOs) and 2.6 power management.
|
|
+ * 29th Nov 2004 Added WM9713 support.
|
|
+ * 4th Jul 2005 Moved codec specific code out to seperate files.
|
|
+ * 6th Sep 2006 Mike Arthur <linux@wolfsonmicro.com>
|
|
+ * Added bus interface.
|
|
+ */
|
|
+
|
|
+#include <linux/module.h>
|
|
+#include <linux/moduleparam.h>
|
|
+#include <linux/version.h>
|
|
+#include <linux/kernel.h>
|
|
+#include <linux/init.h>
|
|
+#include <linux/delay.h>
|
|
+#include <linux/string.h>
|
|
+#include <linux/proc_fs.h>
|
|
+#include <linux/pm.h>
|
|
+#include <linux/interrupt.h>
|
|
+#include <linux/bitops.h>
|
|
+#include <linux/workqueue.h>
|
|
+#include <linux/device.h>
|
|
+#include <linux/wm97xx.h>
|
|
+#include <asm/uaccess.h>
|
|
+#include <asm/io.h>
|
|
+
|
|
+#define TS_NAME "wm97xx"
|
|
+#define WM_CORE_VERSION "0.63"
|
|
+#define DEFAULT_PRESSURE 0xb0c0
|
|
+
|
|
+/*
|
|
+ * WM97xx - enable/disable AUX ADC sysfs
|
|
+ */
|
|
+static int aux_sys = 1;
|
|
+module_param(aux_sys, int, 0);
|
|
+MODULE_PARM_DESC(aux_sys, "enable AUX ADC sysfs entries");
|
|
+
|
|
+/*
|
|
+ * WM97xx - enable/disable codec status sysfs
|
|
+ */
|
|
+static int status_sys = 1;
|
|
+module_param(status_sys, int, 0);
|
|
+MODULE_PARM_DESC(status_sys, "enable codec status sysfs entries");
|
|
+
|
|
+/*
|
|
+ * Touchscreen absolute values
|
|
+ *
|
|
+ * These parameters are used to help the input layer discard out of
|
|
+ * range readings and reduce jitter etc.
|
|
+ *
|
|
+ * o min, max:- indicate the min and max values your touch screen returns
|
|
+ * o fuzz:- use a higher number to reduce jitter
|
|
+ *
|
|
+ * The default values correspond to Mainstone II in QVGA mode
|
|
+ *
|
|
+ * Please read
|
|
+ * Documentation/input/input-programming.txt for more details.
|
|
+ */
|
|
+
|
|
+static int abs_x[3] = {350,3900,5};
|
|
+module_param_array(abs_x, int, NULL, 0);
|
|
+MODULE_PARM_DESC(abs_x, "Touchscreen absolute X min, max, fuzz");
|
|
+
|
|
+static int abs_y[3] = {320,3750,40};
|
|
+module_param_array(abs_y, int, NULL, 0);
|
|
+MODULE_PARM_DESC(abs_y, "Touchscreen absolute Y min, max, fuzz");
|
|
+
|
|
+static int abs_p[3] = {0,150,4};
|
|
+module_param_array(abs_p, int, NULL, 0);
|
|
+MODULE_PARM_DESC(abs_p, "Touchscreen absolute Pressure min, max, fuzz");
|
|
+
|
|
+/*
|
|
+ * Debug
|
|
+ */
|
|
+#if 0
|
|
+#define dbg(format, arg...) printk(KERN_DEBUG TS_NAME ": " format "\n" , ## arg)
|
|
+#else
|
|
+#define dbg(format, arg...)
|
|
+#endif
|
|
+#define err(format, arg...) printk(KERN_ERR TS_NAME ": " format "\n" , ## arg)
|
|
+#define info(format, arg...) printk(KERN_INFO TS_NAME ": " format "\n" , ## arg)
|
|
+#define warn(format, arg...) printk(KERN_WARNING TS_NAME ": " format "\n" , ## arg)
|
|
+
|
|
+/* codec AC97 IO access */
|
|
+int wm97xx_reg_read(struct wm97xx *wm, u16 reg)
|
|
+{
|
|
+ if (wm->ac97)
|
|
+ return wm->ac97->bus->ops->read(wm->ac97, reg);
|
|
+ else
|
|
+ return -1;
|
|
+}
|
|
+
|
|
+void wm97xx_reg_write(struct wm97xx *wm, u16 reg, u16 val)
|
|
+{
|
|
+ /* cache digitiser registers */
|
|
+ if(reg >= AC97_WM9713_DIG1 && reg <= AC97_WM9713_DIG3)
|
|
+ wm->dig[(reg - AC97_WM9713_DIG1) >> 1] = val;
|
|
+
|
|
+ /* cache gpio regs */
|
|
+ if(reg >= AC97_GPIO_CFG && reg <= AC97_MISC_AFE)
|
|
+ wm->gpio[(reg - AC97_GPIO_CFG) >> 1] = val;
|
|
+
|
|
+ /* wm9713 irq reg */
|
|
+ if(reg == 0x5a)
|
|
+ wm->misc = val;
|
|
+
|
|
+ if (wm->ac97)
|
|
+ wm->ac97->bus->ops->write(wm->ac97, reg, val);
|
|
+}
|
|
+
|
|
+
|
|
+/**
|
|
+ * wm97xx_read_aux_adc - Read the aux adc.
|
|
+ * @wm: wm97xx device.
|
|
+ * @adcsel: codec ADC to be read
|
|
+ *
|
|
+ * Reads the selected AUX ADC.
|
|
+ */
|
|
+
|
|
+int wm97xx_read_aux_adc(struct wm97xx *wm, u16 adcsel)
|
|
+{
|
|
+ int power_adc = 0, auxval;
|
|
+ u16 power = 0;
|
|
+
|
|
+ /* get codec */
|
|
+ mutex_lock(&wm->codec_mutex);
|
|
+
|
|
+ /* When the touchscreen is not in use, we may have to power up the AUX ADC
|
|
+ * before we can use sample the AUX inputs->
|
|
+ */
|
|
+ if (wm->id == WM9713_ID2 &&
|
|
+ (power = wm97xx_reg_read(wm, AC97_EXTENDED_MID)) & 0x8000) {
|
|
+ power_adc = 1;
|
|
+ wm97xx_reg_write(wm, AC97_EXTENDED_MID, power & 0x7fff);
|
|
+ }
|
|
+
|
|
+ /* Prepare the codec for AUX reading */
|
|
+ wm->codec->digitiser_ioctl(wm, WM97XX_AUX_PREPARE);
|
|
+
|
|
+ /* Turn polling mode on to read AUX ADC */
|
|
+ wm->pen_probably_down = 1;
|
|
+ wm->codec->poll_sample(wm, adcsel, &auxval);
|
|
+
|
|
+ if (power_adc)
|
|
+ wm97xx_reg_write(wm, AC97_EXTENDED_MID, power | 0x8000);
|
|
+
|
|
+ wm->codec->digitiser_ioctl(wm, WM97XX_DIG_RESTORE);
|
|
+
|
|
+ wm->pen_probably_down = 0;
|
|
+
|
|
+ mutex_unlock(&wm->codec_mutex);
|
|
+ return auxval & 0xfff;
|
|
+}
|
|
+
|
|
+#define WM97XX_AUX_ATTR(name,input) \
|
|
+static ssize_t name##_show(struct device *dev, struct device_attribute *attr, char *buf) \
|
|
+{ \
|
|
+ struct wm97xx *wm = (struct wm97xx*)dev->driver_data; \
|
|
+ return sprintf(buf, "%d\n", wm97xx_read_aux_adc(wm, input)); \
|
|
+} \
|
|
+static DEVICE_ATTR(name, 0444, name##_show, NULL)
|
|
+
|
|
+WM97XX_AUX_ATTR(aux1, WM97XX_AUX_ID1);
|
|
+WM97XX_AUX_ATTR(aux2, WM97XX_AUX_ID2);
|
|
+WM97XX_AUX_ATTR(aux3, WM97XX_AUX_ID3);
|
|
+WM97XX_AUX_ATTR(aux4, WM97XX_AUX_ID4);
|
|
+
|
|
+#define WM97XX_STATUS_ATTR(name) \
|
|
+static ssize_t name##_show(struct device *dev, struct device_attribute *attr, char *buf) \
|
|
+{ \
|
|
+ struct wm97xx *wm = (struct wm97xx*)dev->driver_data; \
|
|
+ return sprintf(buf, "%d\n", wm97xx_reg_read(wm, AC97_GPIO_STATUS)); \
|
|
+} \
|
|
+static DEVICE_ATTR(name, 0444, name##_show, NULL)
|
|
+
|
|
+WM97XX_STATUS_ATTR(gpio);
|
|
+
|
|
+static int wm97xx_sys_add(struct device *dev)
|
|
+{
|
|
+ if (aux_sys) {
|
|
+ device_create_file(dev, &dev_attr_aux1);
|
|
+ device_create_file(dev, &dev_attr_aux2);
|
|
+ device_create_file(dev, &dev_attr_aux3);
|
|
+ device_create_file(dev, &dev_attr_aux4);
|
|
+ }
|
|
+ if (status_sys)
|
|
+ device_create_file(dev, &dev_attr_gpio);
|
|
+ return 0;
|
|
+}
|
|
+
|
|
+static void wm97xx_sys_remove(struct device *dev)
|
|
+{
|
|
+ if (status_sys)
|
|
+ device_remove_file(dev, &dev_attr_gpio);
|
|
+ if (aux_sys) {
|
|
+ device_remove_file(dev, &dev_attr_aux1);
|
|
+ device_remove_file(dev, &dev_attr_aux2);
|
|
+ device_remove_file(dev, &dev_attr_aux3);
|
|
+ device_remove_file(dev, &dev_attr_aux4);
|
|
+ }
|
|
+}
|
|
+
|
|
+/**
|
|
+ * wm97xx_get_gpio - Get the status of a codec GPIO.
|
|
+ * @wm: wm97xx device.
|
|
+ * @gpio: gpio
|
|
+ *
|
|
+ * Get the status of a codec GPIO pin
|
|
+ */
|
|
+
|
|
+wm97xx_gpio_status_t wm97xx_get_gpio(struct wm97xx *wm, u32 gpio)
|
|
+{
|
|
+ u16 status;
|
|
+ wm97xx_gpio_status_t ret;
|
|
+
|
|
+ mutex_lock(&wm->codec_mutex);
|
|
+ status = wm97xx_reg_read(wm, AC97_GPIO_STATUS);
|
|
+
|
|
+ if (status & gpio)
|
|
+ ret = WM97XX_GPIO_HIGH;
|
|
+ else
|
|
+ ret = WM97XX_GPIO_LOW;
|
|
+
|
|
+ mutex_unlock(&wm->codec_mutex);
|
|
+ return ret;
|
|
+}
|
|
+
|
|
+/**
|
|
+ * wm97xx_set_gpio - Set the status of a codec GPIO.
|
|
+ * @wm: wm97xx device.
|
|
+ * @gpio: gpio
|
|
+ *
|
|
+ *
|
|
+ * Set the status of a codec GPIO pin
|
|
+ */
|
|
+
|
|
+void wm97xx_set_gpio(struct wm97xx *wm, u32 gpio,
|
|
+ wm97xx_gpio_status_t status)
|
|
+{
|
|
+ u16 reg;
|
|
+
|
|
+ mutex_lock(&wm->codec_mutex);
|
|
+ reg = wm97xx_reg_read(wm, AC97_GPIO_STATUS);
|
|
+
|
|
+ if (status & WM97XX_GPIO_HIGH)
|
|
+ reg |= gpio;
|
|
+ else
|
|
+ reg &= ~gpio;
|
|
+
|
|
+ if (wm->id == WM9712_ID2)
|
|
+ wm97xx_reg_write(wm, AC97_GPIO_STATUS, reg << 1);
|
|
+ else
|
|
+ wm97xx_reg_write(wm, AC97_GPIO_STATUS, reg);
|
|
+ mutex_unlock(&wm->codec_mutex);
|
|
+}
|
|
+
|
|
+/*
|
|
+ * Codec GPIO pin configuration, this set's pin direction, polarity,
|
|
+ * stickyness and wake up.
|
|
+ */
|
|
+void wm97xx_config_gpio(struct wm97xx *wm, u32 gpio, wm97xx_gpio_dir_t dir,
|
|
+ wm97xx_gpio_pol_t pol, wm97xx_gpio_sticky_t sticky,
|
|
+ wm97xx_gpio_wake_t wake)
|
|
+{
|
|
+ u16 reg;
|
|
+
|
|
+ mutex_lock(&wm->codec_mutex);
|
|
+ reg = wm97xx_reg_read(wm, AC97_GPIO_POLARITY);
|
|
+
|
|
+ if (pol == WM97XX_GPIO_POL_HIGH)
|
|
+ reg |= gpio;
|
|
+ else
|
|
+ reg &= ~gpio;
|
|
+
|
|
+ wm97xx_reg_write(wm, AC97_GPIO_POLARITY, reg);
|
|
+ reg = wm97xx_reg_read(wm, AC97_GPIO_STICKY);
|
|
+
|
|
+ if (sticky == WM97XX_GPIO_STICKY)
|
|
+ reg |= gpio;
|
|
+ else
|
|
+ reg &= ~gpio;
|
|
+
|
|
+ wm97xx_reg_write(wm, AC97_GPIO_STICKY, reg);
|
|
+ reg = wm97xx_reg_read(wm, AC97_GPIO_WAKEUP);
|
|
+
|
|
+ if (wake == WM97XX_GPIO_WAKE)
|
|
+ reg |= gpio;
|
|
+ else
|
|
+ reg &= ~gpio;
|
|
+
|
|
+ wm97xx_reg_write(wm, AC97_GPIO_WAKEUP, reg);
|
|
+ reg = wm97xx_reg_read(wm, AC97_GPIO_CFG);
|
|
+
|
|
+ if (dir == WM97XX_GPIO_IN)
|
|
+ reg |= gpio;
|
|
+ else
|
|
+ reg &= ~gpio;
|
|
+
|
|
+ wm97xx_reg_write(wm, AC97_GPIO_CFG, reg);
|
|
+ mutex_unlock(&wm->codec_mutex);
|
|
+}
|
|
+
|
|
+/*
|
|
+ * Handle a pen down interrupt.
|
|
+ */
|
|
+static void wm97xx_pen_irq_worker(void *ptr)
|
|
+{
|
|
+ struct wm97xx *wm = (struct wm97xx *) ptr;
|
|
+
|
|
+ /* do we need to enable the touch panel reader */
|
|
+ if (wm->id == WM9705_ID2) {
|
|
+ if (wm97xx_reg_read(wm, AC97_WM97XX_DIGITISER_RD) & WM97XX_PEN_DOWN)
|
|
+ wm->pen_is_down = 1;
|
|
+ else
|
|
+ wm->pen_is_down = 0;
|
|
+ wake_up_interruptible(&wm->pen_irq_wait);
|
|
+ } else {
|
|
+ u16 status, pol;
|
|
+ mutex_lock(&wm->codec_mutex);
|
|
+ status = wm97xx_reg_read(wm, AC97_GPIO_STATUS);
|
|
+ pol = wm97xx_reg_read(wm, AC97_GPIO_POLARITY);
|
|
+
|
|
+ if (WM97XX_GPIO_13 & pol & status) {
|
|
+ wm->pen_is_down = 1;
|
|
+ wm97xx_reg_write(wm, AC97_GPIO_POLARITY, pol & ~WM97XX_GPIO_13);
|
|
+ } else {
|
|
+ wm->pen_is_down = 0;
|
|
+ wm97xx_reg_write(wm, AC97_GPIO_POLARITY, pol | WM97XX_GPIO_13);
|
|
+ }
|
|
+
|
|
+ if (wm->id == WM9712_ID2)
|
|
+ wm97xx_reg_write(wm, AC97_GPIO_STATUS, (status & ~WM97XX_GPIO_13) << 1);
|
|
+ else
|
|
+ wm97xx_reg_write(wm, AC97_GPIO_STATUS, status & ~WM97XX_GPIO_13);
|
|
+ mutex_unlock(&wm->codec_mutex);
|
|
+ wake_up_interruptible(&wm->pen_irq_wait);
|
|
+ }
|
|
+
|
|
+ if (!wm->pen_is_down && wm->mach_ops && wm->mach_ops->acc_enabled)
|
|
+ wm->mach_ops->acc_pen_up(wm);
|
|
+ enable_irq(wm->pen_irq);
|
|
+}
|
|
+
|
|
+/*
|
|
+ * Codec PENDOWN irq handler
|
|
+ *
|
|
+ * We have to disable the codec interrupt in the handler because it can
|
|
+ * take upto 1ms to clear the interrupt source. The interrupt is then enabled
|
|
+ * again in the slow handler when the source has been cleared.
|
|
+ */
|
|
+static irqreturn_t wm97xx_pen_interrupt(int irq, void *dev_id,
|
|
+ struct pt_regs *regs)
|
|
+{
|
|
+ struct wm97xx *wm = (struct wm97xx *) dev_id;
|
|
+ disable_irq(wm->pen_irq);
|
|
+ queue_work(wm->pen_irq_workq, &wm->pen_event_work);
|
|
+ return IRQ_HANDLED;
|
|
+}
|
|
+
|
|
+/*
|
|
+ * initialise pen IRQ handler and workqueue
|
|
+ */
|
|
+static int wm97xx_init_pen_irq(struct wm97xx *wm)
|
|
+{
|
|
+ u16 reg;
|
|
+
|
|
+ INIT_WORK(&wm->pen_event_work, wm97xx_pen_irq_worker, wm);
|
|
+ if ((wm->pen_irq_workq =
|
|
+ create_singlethread_workqueue("kwm97pen")) == NULL) {
|
|
+ err("could not create pen irq work queue");
|
|
+ wm->pen_irq = 0;
|
|
+ return -EINVAL;
|
|
+ }
|
|
+
|
|
+ if (request_irq (wm->pen_irq, wm97xx_pen_interrupt, SA_SHIRQ, "wm97xx-pen", wm)) {
|
|
+ err("could not register codec pen down interrupt, will poll for pen down");
|
|
+ destroy_workqueue(wm->pen_irq_workq);
|
|
+ wm->pen_irq = 0;
|
|
+ return -EINVAL;
|
|
+ }
|
|
+
|
|
+ /* enable PEN down on wm9712/13 */
|
|
+ if (wm->id != WM9705_ID2) {
|
|
+ reg = wm97xx_reg_read(wm, AC97_MISC_AFE);
|
|
+ wm97xx_reg_write(wm, AC97_MISC_AFE, reg & 0xfffb);
|
|
+ reg = wm97xx_reg_read(wm, 0x5a);
|
|
+ wm97xx_reg_write(wm, 0x5a, reg & ~0x0001);
|
|
+ }
|
|
+
|
|
+ return 0;
|
|
+}
|
|
+
|
|
+/* Private struct for communication between struct wm97xx_tshread
|
|
+ * and wm97xx_read_samples */
|
|
+struct ts_state {
|
|
+ int sleep_time;
|
|
+ int min_sleep_time;
|
|
+};
|
|
+
|
|
+static int wm97xx_read_samples(struct wm97xx *wm, struct ts_state *state)
|
|
+{
|
|
+ struct wm97xx_data data;
|
|
+ int rc;
|
|
+
|
|
+ mutex_lock(&wm->codec_mutex);
|
|
+
|
|
+ if (wm->mach_ops && wm->mach_ops->acc_enabled)
|
|
+ rc = wm->mach_ops->acc_pen_down(wm);
|
|
+ else
|
|
+ rc = wm->codec->poll_touch(wm, &data);
|
|
+
|
|
+ if (rc & RC_PENUP) {
|
|
+ if (wm->pen_is_down) {
|
|
+ wm->pen_is_down = 0;
|
|
+ dbg("pen up");
|
|
+ input_report_abs(wm->input_dev, ABS_PRESSURE, 0);
|
|
+ input_sync(wm->input_dev);
|
|
+ } else if (!(rc & RC_AGAIN)) {
|
|
+ /* We need high frequency updates only while pen is down,
|
|
+ * the user never will be able to touch screen faster than
|
|
+ * a few times per second... On the other hand, when the
|
|
+ * user is actively working with the touchscreen we don't
|
|
+ * want to lose the quick response. So we will slowly
|
|
+ * increase sleep time after the pen is up and quicky
|
|
+ * restore it to ~one task switch when pen is down again.
|
|
+ */
|
|
+ if (state->sleep_time < HZ / 10)
|
|
+ state->sleep_time++;
|
|
+ }
|
|
+
|
|
+ } else if (rc & RC_VALID) {
|
|
+ dbg("pen down: x=%x:%d, y=%x:%d, pressure=%x:%d\n",
|
|
+ data.x >> 12, data.x & 0xfff, data.y >> 12,
|
|
+ data.y & 0xfff, data.p >> 12, data.p & 0xfff);
|
|
+ input_report_abs(wm->input_dev, ABS_X, data.x & 0xfff);
|
|
+ input_report_abs(wm->input_dev, ABS_Y, data.y & 0xfff);
|
|
+ input_report_abs(wm->input_dev, ABS_PRESSURE, data.p & 0xfff);
|
|
+ input_sync(wm->input_dev);
|
|
+ wm->pen_is_down = 1;
|
|
+ state->sleep_time = state->min_sleep_time;
|
|
+ } else if (rc & RC_PENDOWN) {
|
|
+ dbg("pen down");
|
|
+ wm->pen_is_down = 1;
|
|
+ state->sleep_time = state->min_sleep_time;
|
|
+ }
|
|
+
|
|
+ mutex_unlock(&wm->codec_mutex);
|
|
+ return rc;
|
|
+}
|
|
+
|
|
+/*
|
|
+* The touchscreen sample reader thread.
|
|
+*/
|
|
+static int wm97xx_ts_read(void *data)
|
|
+{
|
|
+ int rc;
|
|
+ struct ts_state state;
|
|
+ struct wm97xx *wm = (struct wm97xx *) data;
|
|
+
|
|
+ /* set up thread context */
|
|
+ wm->ts_task = current;
|
|
+ daemonize("kwm97xxts");
|
|
+
|
|
+ if (wm->codec == NULL) {
|
|
+ wm->ts_task = NULL;
|
|
+ printk(KERN_ERR "codec is NULL, bailing\n");
|
|
+ }
|
|
+
|
|
+ complete(&wm->ts_init);
|
|
+ wm->pen_is_down = 0;
|
|
+ state.min_sleep_time = HZ >= 100 ? HZ / 100 : 1;
|
|
+ if (state.min_sleep_time < 1)
|
|
+ state.min_sleep_time = 1;
|
|
+ state.sleep_time = state.min_sleep_time;
|
|
+
|
|
+ /* touch reader loop */
|
|
+ while (wm->ts_task) {
|
|
+ do {
|
|
+ try_to_freeze();
|
|
+ rc = wm97xx_read_samples(wm, &state);
|
|
+ } while (rc & RC_AGAIN);
|
|
+ if (!wm->pen_is_down && wm->pen_irq) {
|
|
+ /* Nice, we don't have to poll for pen down event */
|
|
+ wait_event_interruptible(wm->pen_irq_wait, wm->pen_is_down);
|
|
+ } else {
|
|
+ set_task_state(current, TASK_INTERRUPTIBLE);
|
|
+ schedule_timeout(state.sleep_time);
|
|
+ }
|
|
+ }
|
|
+ complete_and_exit(&wm->ts_exit, 0);
|
|
+}
|
|
+
|
|
+/**
|
|
+ * wm97xx_ts_input_open - Open the touch screen input device.
|
|
+ * @idev: Input device to be opened.
|
|
+ *
|
|
+ * Called by the input sub system to open a wm97xx touchscreen device.
|
|
+ * Starts the touchscreen thread and touch digitiser.
|
|
+ */
|
|
+static int wm97xx_ts_input_open(struct input_dev *idev)
|
|
+{
|
|
+ int ret = 0;
|
|
+ struct wm97xx *wm = (struct wm97xx *) idev->private;
|
|
+
|
|
+ mutex_lock(&wm->codec_mutex);
|
|
+ /* first time opened ? */
|
|
+ if (wm->ts_use_count++ == 0) {
|
|
+ /* start touchscreen thread */
|
|
+ init_completion(&wm->ts_init);
|
|
+ init_completion(&wm->ts_exit);
|
|
+ ret = kernel_thread(wm97xx_ts_read, wm, CLONE_KERNEL);
|
|
+
|
|
+ if (ret >= 0) {
|
|
+ wait_for_completion(&wm->ts_init);
|
|
+ if (wm->ts_task == NULL)
|
|
+ ret = -EINVAL;
|
|
+ } else {
|
|
+ mutex_unlock(&wm->codec_mutex);
|
|
+ return ret;
|
|
+ }
|
|
+
|
|
+ /* start digitiser */
|
|
+ if (wm->mach_ops && wm->mach_ops->acc_enabled)
|
|
+ wm->codec->acc_enable(wm, 1);
|
|
+ wm->codec->digitiser_ioctl(wm, WM97XX_DIG_START);
|
|
+
|
|
+ /* init pen down/up irq handling */
|
|
+ if (wm->pen_irq) {
|
|
+ wm97xx_init_pen_irq(wm);
|
|
+
|
|
+ if (wm->pen_irq == 0) {
|
|
+ /* we failed to get an irq for pen down events,
|
|
+ * so we resort to polling. kickstart the reader */
|
|
+ wm->pen_is_down = 1;
|
|
+ wake_up_interruptible(&wm->pen_irq_wait);
|
|
+ }
|
|
+ }
|
|
+ }
|
|
+
|
|
+ mutex_unlock(&wm->codec_mutex);
|
|
+ return 0;
|
|
+}
|
|
+
|
|
+/**
|
|
+ * wm97xx_ts_input_close - Close the touch screen input device.
|
|
+ * @idev: Input device to be closed.
|
|
+ *
|
|
+ * Called by the input sub system to close a wm97xx touchscreen device.
|
|
+ * Kills the touchscreen thread and stops the touch digitiser.
|
|
+ */
|
|
+
|
|
+static void wm97xx_ts_input_close(struct input_dev *idev)
|
|
+{
|
|
+ struct wm97xx *wm = (struct wm97xx *) idev->private;
|
|
+
|
|
+ mutex_lock(&wm->codec_mutex);
|
|
+ if (--wm->ts_use_count == 0) {
|
|
+ /* destroy workqueues and free irqs */
|
|
+ if (wm->pen_irq) {
|
|
+ free_irq(wm->pen_irq, wm);
|
|
+ destroy_workqueue(wm->pen_irq_workq);
|
|
+ }
|
|
+
|
|
+ /* kill thread */
|
|
+ if (wm->ts_task) {
|
|
+ wm->ts_task = NULL;
|
|
+ wm->pen_is_down = 1;
|
|
+ wake_up_interruptible(&wm->pen_irq_wait);
|
|
+ wait_for_completion(&wm->ts_exit);
|
|
+ wm->pen_is_down = 0;
|
|
+ }
|
|
+
|
|
+ /* stop digitiser */
|
|
+ wm->codec->digitiser_ioctl(wm, WM97XX_DIG_STOP);
|
|
+ if (wm->mach_ops && wm->mach_ops->acc_enabled)
|
|
+ wm->codec->acc_enable(wm, 0);
|
|
+ }
|
|
+ mutex_unlock(&wm->codec_mutex);
|
|
+}
|
|
+
|
|
+static int wm97xx_bus_match(struct device *dev, struct device_driver *drv)
|
|
+{
|
|
+ return !(strcmp(dev->bus_id,drv->name));
|
|
+}
|
|
+
|
|
+/*
|
|
+ * The AC97 audio driver will do all the Codec suspend and resume
|
|
+ * tasks. This is just for anything machine specific or extra.
|
|
+ */
|
|
+static int wm97xx_bus_suspend(struct device *dev, pm_message_t state)
|
|
+{
|
|
+ int ret = 0;
|
|
+
|
|
+ if (dev->driver && dev->driver->suspend)
|
|
+ ret = dev->driver->suspend(dev, state);
|
|
+
|
|
+ return ret;
|
|
+}
|
|
+
|
|
+static int wm97xx_bus_resume(struct device *dev)
|
|
+{
|
|
+ int ret = 0;
|
|
+
|
|
+ if (dev->driver && dev->driver->resume)
|
|
+ ret = dev->driver->resume(dev);
|
|
+
|
|
+ return ret;
|
|
+}
|
|
+
|
|
+struct bus_type wm97xx_bus_type = {
|
|
+ .name = "wm97xx",
|
|
+ .match = wm97xx_bus_match,
|
|
+ .suspend = wm97xx_bus_suspend,
|
|
+ .resume = wm97xx_bus_resume,
|
|
+};
|
|
+
|
|
+static void wm97xx_release(struct device *dev)
|
|
+{
|
|
+ kfree(dev);
|
|
+}
|
|
+
|
|
+static int wm97xx_probe(struct device *dev)
|
|
+{
|
|
+ struct wm97xx* wm;
|
|
+ int ret = 0, id = 0;
|
|
+
|
|
+ if (!(wm = kzalloc(sizeof(struct wm97xx), GFP_KERNEL)))
|
|
+ return -ENOMEM;
|
|
+ mutex_init(&wm->codec_mutex);
|
|
+
|
|
+ init_waitqueue_head(&wm->pen_irq_wait);
|
|
+ wm->dev = dev;
|
|
+ dev->driver_data = wm;
|
|
+ wm->ac97 = to_ac97_t(dev);
|
|
+
|
|
+ /* check that we have a supported codec */
|
|
+ if ((id = wm97xx_reg_read(wm, AC97_VENDOR_ID1)) != WM97XX_ID1) {
|
|
+ err("could not find a wm97xx, found a %x instead\n", id);
|
|
+ kfree(wm);
|
|
+ return -ENODEV;
|
|
+ }
|
|
+
|
|
+ wm->id = wm97xx_reg_read(wm, AC97_VENDOR_ID2);
|
|
+ if(wm->id != wm97xx_codec.id) {
|
|
+ err("could not find a the selected codec, please build for wm97%2x", wm->id & 0xff);
|
|
+ kfree(wm);
|
|
+ return -ENODEV;
|
|
+ }
|
|
+
|
|
+ if((wm->input_dev = input_allocate_device()) == NULL) {
|
|
+ kfree(wm);
|
|
+ return -ENOMEM;
|
|
+ }
|
|
+
|
|
+ /* set up touch configuration */
|
|
+ info("detected a wm97%2x codec", wm->id & 0xff);
|
|
+ wm->input_dev->name = "wm97xx touchscreen";
|
|
+ wm->input_dev->open = wm97xx_ts_input_open;
|
|
+ wm->input_dev->close = wm97xx_ts_input_close;
|
|
+ set_bit(EV_ABS, wm->input_dev->evbit);
|
|
+ set_bit(ABS_X, wm->input_dev->absbit);
|
|
+ set_bit(ABS_Y, wm->input_dev->absbit);
|
|
+ set_bit(ABS_PRESSURE, wm->input_dev->absbit);
|
|
+ wm->input_dev->absmax[ABS_X] = abs_x[1];
|
|
+ wm->input_dev->absmax[ABS_Y] = abs_y[1];
|
|
+ wm->input_dev->absmax[ABS_PRESSURE] = abs_p[1];
|
|
+ wm->input_dev->absmin[ABS_X] = abs_x[0];
|
|
+ wm->input_dev->absmin[ABS_Y] = abs_y[0];
|
|
+ wm->input_dev->absmin[ABS_PRESSURE] = abs_p[0];
|
|
+ wm->input_dev->absfuzz[ABS_X] = abs_x[2];
|
|
+ wm->input_dev->absfuzz[ABS_Y] = abs_y[2];
|
|
+ wm->input_dev->absfuzz[ABS_PRESSURE] = abs_p[2];
|
|
+ wm->input_dev->private = wm;
|
|
+ wm->codec = &wm97xx_codec;
|
|
+ if((ret = input_register_device(wm->input_dev)) < 0) {
|
|
+ kfree(wm);
|
|
+ return -ENOMEM;
|
|
+ }
|
|
+
|
|
+ if(aux_sys)
|
|
+ wm97xx_sys_add(dev);
|
|
+
|
|
+ /* set up physical characteristics */
|
|
+ wm->codec->digitiser_ioctl(wm, WM97XX_PHY_INIT);
|
|
+
|
|
+ /* load gpio cache */
|
|
+ wm->gpio[0] = wm97xx_reg_read(wm, AC97_GPIO_CFG);
|
|
+ wm->gpio[1] = wm97xx_reg_read(wm, AC97_GPIO_POLARITY);
|
|
+ wm->gpio[2] = wm97xx_reg_read(wm, AC97_GPIO_STICKY);
|
|
+ wm->gpio[3] = wm97xx_reg_read(wm, AC97_GPIO_WAKEUP);
|
|
+ wm->gpio[4] = wm97xx_reg_read(wm, AC97_GPIO_STATUS);
|
|
+ wm->gpio[5] = wm97xx_reg_read(wm, AC97_MISC_AFE);
|
|
+
|
|
+ /* register our battery device */
|
|
+ if (!(wm->battery_dev = kzalloc(sizeof(struct device), GFP_KERNEL))) {
|
|
+ ret = -ENOMEM;
|
|
+ goto batt_err;
|
|
+ }
|
|
+ wm->battery_dev->bus = &wm97xx_bus_type;
|
|
+ strcpy(wm->battery_dev->bus_id,"wm97xx-battery");
|
|
+ wm->battery_dev->driver_data = wm;
|
|
+ wm->battery_dev->parent = dev;
|
|
+ wm->battery_dev->release = wm97xx_release;
|
|
+ if((ret = device_register(wm->battery_dev)) < 0)
|
|
+ goto batt_reg_err;
|
|
+
|
|
+ /* register our extended touch device (for machine specific extensions) */
|
|
+ if (!(wm->touch_dev = kzalloc(sizeof(struct device), GFP_KERNEL))) {
|
|
+ ret = -ENOMEM;
|
|
+ goto touch_err;
|
|
+ }
|
|
+ wm->touch_dev->bus = &wm97xx_bus_type;
|
|
+ strcpy(wm->touch_dev->bus_id,"wm97xx-touchscreen");
|
|
+ wm->touch_dev->driver_data = wm;
|
|
+ wm->touch_dev->parent = dev;
|
|
+ wm->touch_dev->release = wm97xx_release;
|
|
+ if((ret = device_register(wm->touch_dev)) < 0)
|
|
+ goto touch_reg_err;
|
|
+
|
|
+ return ret;
|
|
+
|
|
+touch_reg_err:
|
|
+ kfree(wm->touch_dev);
|
|
+touch_err:
|
|
+ device_unregister(wm->battery_dev);
|
|
+batt_reg_err:
|
|
+ kfree(wm->battery_dev);
|
|
+batt_err:
|
|
+ input_unregister_device(wm->input_dev);
|
|
+ kfree(wm);
|
|
+ return ret;
|
|
+}
|
|
+
|
|
+static int wm97xx_remove(struct device *dev)
|
|
+{
|
|
+ struct wm97xx *wm = dev_get_drvdata(dev);
|
|
+
|
|
+ /* Stop touch reader thread */
|
|
+ if (wm->ts_task) {
|
|
+ wm->ts_task = NULL;
|
|
+ wm->pen_is_down = 1;
|
|
+ wake_up_interruptible(&wm->pen_irq_wait);
|
|
+ wait_for_completion(&wm->ts_exit);
|
|
+ }
|
|
+ device_unregister(wm->battery_dev);
|
|
+ device_unregister(wm->touch_dev);
|
|
+ input_unregister_device(wm->input_dev);
|
|
+
|
|
+ if(aux_sys)
|
|
+ wm97xx_sys_remove(dev);
|
|
+
|
|
+ kfree(wm);
|
|
+ return 0;
|
|
+}
|
|
+
|
|
+#ifdef CONFIG_PM
|
|
+int wm97xx_resume(struct device* dev)
|
|
+{
|
|
+ struct wm97xx *wm = dev_get_drvdata(dev);
|
|
+
|
|
+ /* restore digitiser and gpio's */
|
|
+ if(wm->id == WM9713_ID2) {
|
|
+ wm97xx_reg_write(wm, AC97_WM9713_DIG1, wm->dig[0]);
|
|
+ wm97xx_reg_write(wm, 0x5a, wm->misc);
|
|
+ if(wm->ts_use_count) {
|
|
+ u16 reg = wm97xx_reg_read(wm, AC97_EXTENDED_MID) & 0x7fff;
|
|
+ wm97xx_reg_write(wm, AC97_EXTENDED_MID, reg);
|
|
+ }
|
|
+ }
|
|
+
|
|
+ wm97xx_reg_write(wm, AC97_WM9713_DIG2, wm->dig[1]);
|
|
+ wm97xx_reg_write(wm, AC97_WM9713_DIG3, wm->dig[2]);
|
|
+
|
|
+ wm97xx_reg_write(wm, AC97_GPIO_CFG, wm->gpio[0]);
|
|
+ wm97xx_reg_write(wm, AC97_GPIO_POLARITY, wm->gpio[1]);
|
|
+ wm97xx_reg_write(wm, AC97_GPIO_STICKY, wm->gpio[2]);
|
|
+ wm97xx_reg_write(wm, AC97_GPIO_WAKEUP, wm->gpio[3]);
|
|
+ wm97xx_reg_write(wm, AC97_GPIO_STATUS, wm->gpio[4]);
|
|
+ wm97xx_reg_write(wm, AC97_MISC_AFE, wm->gpio[5]);
|
|
+
|
|
+ return 0;
|
|
+}
|
|
+
|
|
+#else
|
|
+#define wm97xx_resume NULL
|
|
+#endif
|
|
+
|
|
+int wm97xx_register_mach_ops(struct wm97xx *wm, struct wm97xx_mach_ops *mach_ops)
|
|
+{
|
|
+ mutex_lock(&wm->codec_mutex);
|
|
+ if(wm->mach_ops) {
|
|
+ mutex_unlock(&wm->codec_mutex);
|
|
+ return -EINVAL;
|
|
+ }
|
|
+ wm->mach_ops = mach_ops;
|
|
+ mutex_unlock(&wm->codec_mutex);
|
|
+ return 0;
|
|
+}
|
|
+
|
|
+void wm97xx_unregister_mach_ops(struct wm97xx *wm)
|
|
+{
|
|
+ mutex_lock(&wm->codec_mutex);
|
|
+ wm->mach_ops = NULL;
|
|
+ mutex_unlock(&wm->codec_mutex);
|
|
+}
|
|
+
|
|
+static struct device_driver wm97xx_driver = {
|
|
+ .name = "ac97",
|
|
+ .bus = &ac97_bus_type,
|
|
+ .owner = THIS_MODULE,
|
|
+ .probe = wm97xx_probe,
|
|
+ .remove = wm97xx_remove,
|
|
+ .resume = wm97xx_resume,
|
|
+};
|
|
+
|
|
+static int __init wm97xx_init(void)
|
|
+{
|
|
+ int ret;
|
|
+
|
|
+ info("version %s liam.girdwood@wolfsonmicro.com", WM_CORE_VERSION);
|
|
+ if((ret = bus_register(&wm97xx_bus_type)) < 0)
|
|
+ return ret;
|
|
+ return driver_register(&wm97xx_driver);
|
|
+}
|
|
+
|
|
+static void __exit wm97xx_exit(void)
|
|
+{
|
|
+ driver_unregister(&wm97xx_driver);
|
|
+ bus_unregister(&wm97xx_bus_type);
|
|
+}
|
|
+
|
|
+EXPORT_SYMBOL_GPL(wm97xx_get_gpio);
|
|
+EXPORT_SYMBOL_GPL(wm97xx_set_gpio);
|
|
+EXPORT_SYMBOL_GPL(wm97xx_config_gpio);
|
|
+EXPORT_SYMBOL_GPL(wm97xx_read_aux_adc);
|
|
+EXPORT_SYMBOL_GPL(wm97xx_reg_read);
|
|
+EXPORT_SYMBOL_GPL(wm97xx_reg_write);
|
|
+EXPORT_SYMBOL_GPL(wm97xx_bus_type);
|
|
+EXPORT_SYMBOL_GPL(wm97xx_register_mach_ops);
|
|
+EXPORT_SYMBOL_GPL(wm97xx_unregister_mach_ops);
|
|
+
|
|
+module_init(wm97xx_init);
|
|
+module_exit(wm97xx_exit);
|
|
+
|
|
+/* Module information */
|
|
+MODULE_AUTHOR("Liam Girdwood, liam.girdwood@wolfsonmicro.com, www.wolfsonmicro.com");
|
|
+MODULE_DESCRIPTION("WM97xx Core - Touch Screen / AUX ADC / GPIO Driver");
|
|
+MODULE_LICENSE("GPL");
|
|
Index: linux-2.6.17/include/linux/wm97xx.h
|
|
===================================================================
|
|
--- /dev/null 1970-01-01 00:00:00.000000000 +0000
|
|
+++ linux-2.6.17/include/linux/wm97xx.h 2006-09-19 20:36:47.973052250 +0200
|
|
@@ -0,0 +1,291 @@
|
|
+
|
|
+/*
|
|
+ * Register bits and API for Wolfson WM97xx series of codecs
|
|
+ */
|
|
+
|
|
+#ifndef _LINUX_WM97XX_H
|
|
+#define _LINUX_WM97XX_H
|
|
+
|
|
+#include <sound/driver.h>
|
|
+#include <sound/core.h>
|
|
+#include <sound/pcm.h>
|
|
+#include <sound/ac97_codec.h>
|
|
+#include <sound/initval.h>
|
|
+#include <linux/types.h>
|
|
+#include <linux/list.h>
|
|
+#include <linux/input.h> /* Input device layer */
|
|
+
|
|
+/*
|
|
+ * WM97xx AC97 Touchscreen registers
|
|
+ */
|
|
+#define AC97_WM97XX_DIGITISER1 0x76
|
|
+#define AC97_WM97XX_DIGITISER2 0x78
|
|
+#define AC97_WM97XX_DIGITISER_RD 0x7a
|
|
+#define AC97_WM9713_DIG1 0x74
|
|
+#define AC97_WM9713_DIG2 AC97_WM97XX_DIGITISER1
|
|
+#define AC97_WM9713_DIG3 AC97_WM97XX_DIGITISER2
|
|
+
|
|
+/*
|
|
+ * WM97xx register bits
|
|
+ */
|
|
+#define WM97XX_POLL 0x8000 /* initiate a polling measurement */
|
|
+#define WM97XX_ADCSEL_X 0x1000 /* x coord measurement */
|
|
+#define WM97XX_ADCSEL_Y 0x2000 /* y coord measurement */
|
|
+#define WM97XX_ADCSEL_PRES 0x3000 /* pressure measurement */
|
|
+#define WM97XX_ADCSEL_MASK 0x7000
|
|
+#define WM97XX_COO 0x0800 /* enable coordinate mode */
|
|
+#define WM97XX_CTC 0x0400 /* enable continuous mode */
|
|
+#define WM97XX_CM_RATE_93 0x0000 /* 93.75Hz continuous rate */
|
|
+#define WM97XX_CM_RATE_187 0x0100 /* 187.5Hz continuous rate */
|
|
+#define WM97XX_CM_RATE_375 0x0200 /* 375Hz continuous rate */
|
|
+#define WM97XX_CM_RATE_750 0x0300 /* 750Hz continuous rate */
|
|
+#define WM97XX_CM_RATE_8K 0x00f0 /* 8kHz continuous rate */
|
|
+#define WM97XX_CM_RATE_12K 0x01f0 /* 12kHz continuous rate */
|
|
+#define WM97XX_CM_RATE_24K 0x02f0 /* 24kHz continuous rate */
|
|
+#define WM97XX_CM_RATE_48K 0x03f0 /* 48kHz continuous rate */
|
|
+#define WM97XX_CM_RATE_MASK 0x03f0
|
|
+#define WM97XX_RATE(i) (((i & 3) << 8) | ((i & 4) ? 0xf0 : 0))
|
|
+#define WM97XX_DELAY(i) ((i << 4) & 0x00f0) /* sample delay times */
|
|
+#define WM97XX_DELAY_MASK 0x00f0
|
|
+#define WM97XX_SLEN 0x0008 /* slot read back enable */
|
|
+#define WM97XX_SLT(i) ((i - 5) & 0x7) /* touchpanel slot selection (5-11) */
|
|
+#define WM97XX_SLT_MASK 0x0007
|
|
+#define WM97XX_PRP_DETW 0x4000 /* pen detect on, digitiser off, wake up */
|
|
+#define WM97XX_PRP_DET 0x8000 /* pen detect on, digitiser off, no wake up */
|
|
+#define WM97XX_PRP_DET_DIG 0xc000 /* pen detect on, digitiser on */
|
|
+#define WM97XX_RPR 0x2000 /* wake up on pen down */
|
|
+#define WM97XX_PEN_DOWN 0x8000 /* pen is down */
|
|
+#define WM97XX_ADCSRC_MASK 0x7000 /* ADC source mask */
|
|
+
|
|
+#define WM97XX_AUX_ID1 0x8001
|
|
+#define WM97XX_AUX_ID2 0x8002
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|
+#define WM97XX_AUX_ID3 0x8003
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|
+#define WM97XX_AUX_ID4 0x8004
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|
+
|
|
+
|
|
+/* WM9712 Bits */
|
|
+#define WM9712_45W 0x1000 /* set for 5-wire touchscreen */
|
|
+#define WM9712_PDEN 0x0800 /* measure only when pen down */
|
|
+#define WM9712_WAIT 0x0200 /* wait until adc is read before next sample */
|
|
+#define WM9712_PIL 0x0100 /* current used for pressure measurement. set 400uA else 200uA */
|
|
+#define WM9712_MASK_HI 0x0040 /* hi on mask pin (47) stops conversions */
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|
+#define WM9712_MASK_EDGE 0x0080 /* rising/falling edge on pin delays sample */
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|
+#define WM9712_MASK_SYNC 0x00c0 /* rising/falling edge on mask initiates sample */
|
|
+#define WM9712_RPU(i) (i&0x3f) /* internal pull up on pen detect (64k / rpu) */
|
|
+#define WM9712_PD(i) (0x1 << i) /* power management */
|
|
+
|
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+/* WM9712 Registers */
|
|
+#define AC97_WM9712_POWER 0x24
|
|
+#define AC97_WM9712_REV 0x58
|
|
+
|
|
+/* WM9705 Bits */
|
|
+#define WM9705_PDEN 0x1000 /* measure only when pen is down */
|
|
+#define WM9705_PINV 0x0800 /* inverts sense of pen down output */
|
|
+#define WM9705_BSEN 0x0400 /* BUSY flag enable, pin47 is 1 when busy */
|
|
+#define WM9705_BINV 0x0200 /* invert BUSY (pin47) output */
|
|
+#define WM9705_WAIT 0x0100 /* wait until adc is read before next sample */
|
|
+#define WM9705_PIL 0x0080 /* current used for pressure measurement. set 400uA else 200uA */
|
|
+#define WM9705_PHIZ 0x0040 /* set PHONE and PCBEEP inputs to high impedance */
|
|
+#define WM9705_MASK_HI 0x0010 /* hi on mask stops conversions */
|
|
+#define WM9705_MASK_EDGE 0x0020 /* rising/falling edge on pin delays sample */
|
|
+#define WM9705_MASK_SYNC 0x0030 /* rising/falling edge on mask initiates sample */
|
|
+#define WM9705_PDD(i) (i & 0x000f) /* pen detect comparator threshold */
|
|
+
|
|
+
|
|
+/* WM9713 Bits */
|
|
+#define WM9713_PDPOL 0x0400 /* Pen down polarity */
|
|
+#define WM9713_POLL 0x0200 /* initiate a polling measurement */
|
|
+#define WM9713_CTC 0x0100 /* enable continuous mode */
|
|
+#define WM9713_ADCSEL_X 0x0002 /* X measurement */
|
|
+#define WM9713_ADCSEL_Y 0x0004 /* Y measurement */
|
|
+#define WM9713_ADCSEL_PRES 0x0008 /* Pressure measurement */
|
|
+#define WM9713_COO 0x0001 /* enable coordinate mode */
|
|
+#define WM9713_PDEN 0x0800 /* measure only when pen down */
|
|
+#define WM9713_ADCSEL_MASK 0x00fe /* ADC selection mask */
|
|
+#define WM9713_WAIT 0x0200 /* coordinate wait */
|
|
+
|
|
+/* AUX ADC ID's */
|
|
+#define TS_COMP1 0x0
|
|
+#define TS_COMP2 0x1
|
|
+#define TS_BMON 0x2
|
|
+#define TS_WIPER 0x3
|
|
+
|
|
+/* ID numbers */
|
|
+#define WM97XX_ID1 0x574d
|
|
+#define WM9712_ID2 0x4c12
|
|
+#define WM9705_ID2 0x4c05
|
|
+#define WM9713_ID2 0x4c13
|
|
+
|
|
+/* Codec GPIO's */
|
|
+#define WM97XX_MAX_GPIO 16
|
|
+#define WM97XX_GPIO_1 (1 << 1)
|
|
+#define WM97XX_GPIO_2 (1 << 2)
|
|
+#define WM97XX_GPIO_3 (1 << 3)
|
|
+#define WM97XX_GPIO_4 (1 << 4)
|
|
+#define WM97XX_GPIO_5 (1 << 5)
|
|
+#define WM97XX_GPIO_6 (1 << 6)
|
|
+#define WM97XX_GPIO_7 (1 << 7)
|
|
+#define WM97XX_GPIO_8 (1 << 8)
|
|
+#define WM97XX_GPIO_9 (1 << 9)
|
|
+#define WM97XX_GPIO_10 (1 << 10)
|
|
+#define WM97XX_GPIO_11 (1 << 11)
|
|
+#define WM97XX_GPIO_12 (1 << 12)
|
|
+#define WM97XX_GPIO_13 (1 << 13)
|
|
+#define WM97XX_GPIO_14 (1 << 14)
|
|
+#define WM97XX_GPIO_15 (1 << 15)
|
|
+
|
|
+
|
|
+#define AC97_LINK_FRAME 21 /* time in uS for AC97 link frame */
|
|
+
|
|
+
|
|
+/*---------------- Return codes from sample reading functions ---------------*/
|
|
+
|
|
+/* More data is available; call the sample gathering function again */
|
|
+#define RC_AGAIN 0x00000001
|
|
+/* The returned sample is valid */
|
|
+#define RC_VALID 0x00000002
|
|
+/* The pen is up (the first RC_VALID without RC_PENUP means pen is down) */
|
|
+#define RC_PENUP 0x00000004
|
|
+/* The pen is down (RC_VALID implies RC_PENDOWN, but sometimes it is helpful
|
|
+ to tell the handler that the pen is down but we don't know yet his coords,
|
|
+ so the handler should not sleep or wait for pendown irq) */
|
|
+#define RC_PENDOWN 0x00000008
|
|
+
|
|
+/* The wm97xx driver provides a private API for writing platform-specific
|
|
+ * drivers.
|
|
+ */
|
|
+
|
|
+/* The structure used to return arch specific sampled data into */
|
|
+struct wm97xx_data {
|
|
+ int x;
|
|
+ int y;
|
|
+ int p;
|
|
+};
|
|
+
|
|
+/* Codec GPIO status
|
|
+ */
|
|
+typedef enum {
|
|
+ WM97XX_GPIO_HIGH,
|
|
+ WM97XX_GPIO_LOW
|
|
+} wm97xx_gpio_status_t;
|
|
+
|
|
+/* Codec GPIO direction
|
|
+ */
|
|
+typedef enum {
|
|
+ WM97XX_GPIO_IN,
|
|
+ WM97XX_GPIO_OUT
|
|
+} wm97xx_gpio_dir_t;
|
|
+
|
|
+/* Codec GPIO polarity
|
|
+ */
|
|
+typedef enum {
|
|
+ WM97XX_GPIO_POL_HIGH,
|
|
+ WM97XX_GPIO_POL_LOW
|
|
+} wm97xx_gpio_pol_t;
|
|
+
|
|
+/* Codec GPIO sticky
|
|
+ */
|
|
+typedef enum {
|
|
+ WM97XX_GPIO_STICKY,
|
|
+ WM97XX_GPIO_NOTSTICKY
|
|
+} wm97xx_gpio_sticky_t;
|
|
+
|
|
+/* Codec GPIO wake
|
|
+ */
|
|
+typedef enum {
|
|
+ WM97XX_GPIO_WAKE,
|
|
+ WM97XX_GPIO_NOWAKE
|
|
+} wm97xx_gpio_wake_t;
|
|
+
|
|
+
|
|
+/*
|
|
+ * Digitiser ioctl commands
|
|
+ */
|
|
+#define WM97XX_DIG_START 0x1
|
|
+#define WM97XX_DIG_STOP 0x2
|
|
+#define WM97XX_PHY_INIT 0x3
|
|
+#define WM97XX_AUX_PREPARE 0x4
|
|
+#define WM97XX_DIG_RESTORE 0x5
|
|
+
|
|
+struct wm97xx;
|
|
+extern struct wm97xx_codec_drv wm97xx_codec;
|
|
+
|
|
+/*
|
|
+ * Codec driver interface - allows mapping to WM9705/12/13 and newer codecs
|
|
+ */
|
|
+struct wm97xx_codec_drv {
|
|
+ u16 id;
|
|
+ char *name;
|
|
+ int (*poll_sample) (struct wm97xx *, int adcsel, int *sample); /* read 1 sample */
|
|
+ int (*poll_touch) (struct wm97xx *, struct wm97xx_data *); /* read X,Y,[P] in poll */
|
|
+ int (*digitiser_ioctl) (struct wm97xx *, int cmd);
|
|
+ int (*acc_enable) (struct wm97xx *, int enable);
|
|
+};
|
|
+
|
|
+
|
|
+/* Machine specific and accelerated touch operations */
|
|
+struct wm97xx_mach_ops {
|
|
+
|
|
+ /* accelerated touch readback - coords are transmited on AC97 link */
|
|
+ int acc_enabled;
|
|
+ void (*acc_pen_up) (struct wm97xx *);
|
|
+ int (*acc_pen_down) (struct wm97xx *);
|
|
+ int (*acc_startup) (struct wm97xx *);
|
|
+ void (*acc_shutdown) (struct wm97xx *);
|
|
+
|
|
+ /* pre and post sample - can be used to minimise any analog noise */
|
|
+ void (*pre_sample) (int); /* function to run before sampling */
|
|
+ void (*post_sample) (int); /* function to run after sampling */
|
|
+};
|
|
+
|
|
+struct wm97xx {
|
|
+ u16 dig[3], id, gpio[6], misc; /* Cached codec registers */
|
|
+ u16 dig_save[3]; /* saved during aux reading */
|
|
+ struct wm97xx_codec_drv *codec; /* attached codec driver*/
|
|
+ struct input_dev* input_dev; /* touchscreen input device */
|
|
+ ac97_t *ac97; /* ALSA codec access */
|
|
+ struct device *dev; /* ALSA device */
|
|
+ struct device *battery_dev;
|
|
+ struct device *touch_dev;
|
|
+ struct wm97xx_mach_ops *mach_ops;
|
|
+ struct mutex codec_mutex;
|
|
+ struct completion ts_init;
|
|
+ struct completion ts_exit;
|
|
+ struct task_struct *ts_task;
|
|
+ unsigned int pen_irq; /* Pen IRQ number in use */
|
|
+ wait_queue_head_t pen_irq_wait; /* Pen IRQ wait queue */
|
|
+ struct workqueue_struct *pen_irq_workq;
|
|
+ struct work_struct pen_event_work;
|
|
+ u16 acc_slot; /* AC97 slot used for acc touch data */
|
|
+ u16 acc_rate; /* acc touch data rate */
|
|
+ unsigned int ts_use_count;
|
|
+ unsigned pen_is_down:1; /* Pen is down */
|
|
+ unsigned aux_waiting:1; /* aux measurement waiting */
|
|
+ unsigned pen_probably_down:1; /* used in polling mode */
|
|
+};
|
|
+
|
|
+/* Codec GPIO access (not supported on WM9705)
|
|
+ * This can be used to set/get codec GPIO and Virtual GPIO status.
|
|
+ */
|
|
+wm97xx_gpio_status_t wm97xx_get_gpio(struct wm97xx *wm, u32 gpio);
|
|
+void wm97xx_set_gpio(struct wm97xx *wm, u32 gpio,
|
|
+ wm97xx_gpio_status_t status);
|
|
+void wm97xx_config_gpio(struct wm97xx *wm, u32 gpio,
|
|
+ wm97xx_gpio_dir_t dir,
|
|
+ wm97xx_gpio_pol_t pol,
|
|
+ wm97xx_gpio_sticky_t sticky,
|
|
+ wm97xx_gpio_wake_t wake);
|
|
+
|
|
+/* codec AC97 IO access */
|
|
+int wm97xx_reg_read(struct wm97xx *wm, u16 reg);
|
|
+void wm97xx_reg_write(struct wm97xx *wm, u16 reg, u16 val);
|
|
+
|
|
+/* aux adc readback */
|
|
+int wm97xx_read_aux_adc(struct wm97xx *wm, u16 adcsel);
|
|
+
|
|
+/* machine ops */
|
|
+int wm97xx_register_mach_ops(struct wm97xx *, struct wm97xx_mach_ops *);
|
|
+void wm97xx_unregister_mach_ops(struct wm97xx *);
|
|
+
|
|
+extern struct bus_type wm97xx_bus_type;
|
|
+#endif
|