diff options
Diffstat (limited to 'packages/kexecboot/linux-kexecboot-2.6.24/tosa/0031-Add-chip-driver-for-WM9705-touchscreen.patch')
| -rw-r--r-- | packages/kexecboot/linux-kexecboot-2.6.24/tosa/0031-Add-chip-driver-for-WM9705-touchscreen.patch | 383 |
1 files changed, 0 insertions, 383 deletions
diff --git a/packages/kexecboot/linux-kexecboot-2.6.24/tosa/0031-Add-chip-driver-for-WM9705-touchscreen.patch b/packages/kexecboot/linux-kexecboot-2.6.24/tosa/0031-Add-chip-driver-for-WM9705-touchscreen.patch deleted file mode 100644 index 3890795f61..0000000000 --- a/packages/kexecboot/linux-kexecboot-2.6.24/tosa/0031-Add-chip-driver-for-WM9705-touchscreen.patch +++ /dev/null @@ -1,383 +0,0 @@ -From 7b366ca784d0540613a43908de803e4dedc100d3 Mon Sep 17 00:00:00 2001 -From: Mark Brown <broonie@opensource.wolfsonmicro.com> -Date: Sat, 26 Jan 2008 21:14:20 +0300 -Subject: [PATCH 31/64] Add chip driver for WM9705 touchscreen - -Signed-off-by: Liam Girdwood <liam.girdwood@wolfsonmicro.com> -Signed-off-by: Graeme Gregory <gg@opensource.wolfsonmicro.com> -Signed-off-by: Mike Arthur <mike.arthur@wolfsonmicro.com> -Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com> -Cc: Dmitry Baryshkov <dbaryshkov@gmail.com> -Cc: Stanley Cai <stanley.cai@intel.com> -Cc: Rodolfo Giometti <giometti@enneenne.com> -Cc: Russell King <rmk@arm.linux.org.uk> -Cc: Marc Kleine-Budde <mkl@pengutronix.de> -Cc: Ian Molton <spyro@f2s.com> -Cc: Vince Sanders <vince@kyllikki.org> -Cc: Andrew Zabolotny <zap@homelink.ru> ---- - drivers/input/touchscreen/wm9705.c | 352 ++++++++++++++++++++++++++++++++++++ - 1 files changed, 352 insertions(+), 0 deletions(-) - create mode 100644 drivers/input/touchscreen/wm9705.c - -diff --git a/drivers/input/touchscreen/wm9705.c b/drivers/input/touchscreen/wm9705.c -new file mode 100644 -index 0000000..f185104 ---- /dev/null -+++ b/drivers/input/touchscreen/wm9705.c -@@ -0,0 +1,352 @@ -+/* -+ * wm9705.c -- Codec driver for Wolfson WM9705 AC97 Codec. -+ * -+ * Copyright 2003, 2004, 2005, 2006, 2007 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. -+ * -+ */ -+ -+#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 -+ -+/* -+ * 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; -+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; -+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 wm9705_phy_init(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; -+ dev_dbg(wm->dev, -+ "setting pressure measurement current to 400uA."); -+ } else if (pil) -+ dev_dbg(wm->dev, -+ "setting pressure measurement current to 200uA."); -+ if (!pil) -+ pressure = 0; -+ -+ /* polling mode sample settling delay */ -+ if (delay != 4) { -+ if (delay < 0 || delay > 15) { -+ dev_dbg(wm->dev, "supplied delay out of range."); -+ delay = 4; -+ } -+ } -+ dig1 &= 0xff0f; -+ dig1 |= WM97XX_DELAY(delay); -+ dev_dbg(wm->dev, "setting adc sample delay to %d u Secs.", -+ delay_table[delay]); -+ -+ /* WM9705 pdd */ -+ dig2 |= (pdd & 0x000f); -+ dev_dbg(wm->dev, "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 void wm9705_dig_enable(struct wm97xx *wm, int enable) -+{ -+ if (enable) { -+ wm97xx_reg_write(wm, AC97_WM97XX_DIGITISER2, -+ wm->dig[2] | WM97XX_PRP_DET_DIG); -+ wm97xx_reg_read(wm, AC97_WM97XX_DIGITISER_RD); /* dummy read */ -+ } else -+ wm97xx_reg_write(wm, AC97_WM97XX_DIGITISER2, -+ wm->dig[2] & ~WM97XX_PRP_DET_DIG); -+} -+ -+static void wm9705_aux_prepare(struct wm97xx *wm) -+{ -+ 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); -+} -+ -+static void wm9705_dig_restore(struct wm97xx *wm) -+{ -+ wm97xx_reg_write(wm, AC97_WM97XX_DIGITISER1, wm->dig_save[1]); -+ wm97xx_reg_write(wm, AC97_WM97XX_DIGITISER2, wm->dig_save[2]); -+} -+ -+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 -+ dev_dbg(wm->dev, "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) { -+ dev_dbg(wm->dev, "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; -+ -+ rc = wm9705_poll_sample(wm, WM97XX_ADCSEL_X, &data->x); -+ if (rc != RC_VALID) -+ return rc; -+ rc = wm9705_poll_sample(wm, WM97XX_ADCSEL_Y, &data->y); -+ if (rc != RC_VALID) -+ return rc; -+ if (pil) { -+ rc = wm9705_poll_sample(wm, WM97XX_ADCSEL_PRES, &data->p); -+ if (rc != 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 wm9705_codec = { -+ .id = WM9705_ID2, -+ .name = "wm9705", -+ .poll_sample = wm9705_poll_sample, -+ .poll_touch = wm9705_poll_touch, -+ .acc_enable = wm9705_acc_enable, -+ .phy_init = wm9705_phy_init, -+ .dig_enable = wm9705_dig_enable, -+ .dig_restore = wm9705_dig_restore, -+ .aux_prepare = wm9705_aux_prepare, -+}; -+EXPORT_SYMBOL_GPL(wm9705_codec); -+ -+/* Module information */ -+MODULE_AUTHOR("Liam Girdwood <liam.girdwood@wolfsonmicro.com>"); -+MODULE_DESCRIPTION("WM9705 Touch Screen Driver"); -+MODULE_LICENSE("GPL"); --- -1.5.3.8 - |