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-rw-r--r--packages/linux/linux-rp-2.6.24/tosa/0032-Add-chip-driver-for-WM9712-touchscreen.patch492
1 files changed, 0 insertions, 492 deletions
diff --git a/packages/linux/linux-rp-2.6.24/tosa/0032-Add-chip-driver-for-WM9712-touchscreen.patch b/packages/linux/linux-rp-2.6.24/tosa/0032-Add-chip-driver-for-WM9712-touchscreen.patch
deleted file mode 100644
index 6265910a1e..0000000000
--- a/packages/linux/linux-rp-2.6.24/tosa/0032-Add-chip-driver-for-WM9712-touchscreen.patch
+++ /dev/null
@@ -1,492 +0,0 @@
-From b2640063b8321bdfb324c00d5f0c3366ac31696b Mon Sep 17 00:00:00 2001
-From: Mark Brown <broonie@opensource.wolfsonmicro.com>
-Date: Sat, 26 Jan 2008 21:14:19 +0300
-Subject: [PATCH 32/64] Add chip driver for WM9712 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/wm9712.c | 461 ++++++++++++++++++++++++++++++++++++
- 1 files changed, 461 insertions(+), 0 deletions(-)
- create mode 100644 drivers/input/touchscreen/wm9712.c
-
-diff --git a/drivers/input/touchscreen/wm9712.c b/drivers/input/touchscreen/wm9712.c
-new file mode 100644
-index 0000000..eaab326
---- /dev/null
-+++ b/drivers/input/touchscreen/wm9712.c
-@@ -0,0 +1,461 @@
-+/*
-+ * wm9712.c -- Codec driver for Wolfson WM9712 AC97 Codecs.
-+ *
-+ * 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 WM9712_VERSION "0.61"
-+#define DEFAULT_PRESSURE 0xb0c0
-+
-+/*
-+ * 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 = 8;
-+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;
-+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;
-+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;
-+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 wm9712_phy_init(struct wm97xx *wm)
-+{
-+ u16 dig1 = 0;
-+ u16 dig2 = WM97XX_RPR | WM9712_RPU(1);
-+
-+ /* WM9712 rpu */
-+ if (rpu) {
-+ dig2 &= 0xffc0;
-+ dig2 |= WM9712_RPU(rpu);
-+ dev_dbg(wm->dev, "setting pen detect pull-up to %d Ohms",
-+ 64000 / rpu);
-+ }
-+
-+ /* touchpanel pressure current*/
-+ if (pil == 2) {
-+ dig2 |= WM9712_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;
-+
-+ /* WM9712 five wire */
-+ if (five_wire) {
-+ dig2 |= WM9712_45W;
-+ dev_dbg(wm->dev, "setting 5-wire touchscreen mode.");
-+ }
-+
-+ /* polling mode sample settling delay */
-+ 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]);
-+
-+ /* 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 void wm9712_dig_enable(struct wm97xx *wm, int enable)
-+{
-+ u16 dig2 = wm->dig[2];
-+
-+ if (enable) {
-+ wm97xx_reg_write(wm, AC97_WM97XX_DIGITISER2,
-+ dig2 | WM97XX_PRP_DET_DIG);
-+ wm97xx_reg_read(wm, AC97_WM97XX_DIGITISER_RD); /* dummy read */
-+ } else
-+ wm97xx_reg_write(wm, AC97_WM97XX_DIGITISER2,
-+ dig2 & ~WM97XX_PRP_DET_DIG);
-+}
-+
-+static void wm9712_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 wm9712_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] & 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
-+ 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;
-+}
-+
-+/*
-+ * 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_rd = wm97xx_reg_read(wm, AC97_WM97XX_DIGITISER_RD);
-+ if (!(data_rd & 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
-+ dev_dbg(wm->dev, "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) {
-+ rc = wm9712_poll_coord(wm, data);
-+ if (rc != RC_VALID)
-+ return rc;
-+ } else {
-+ rc = wm9712_poll_sample(wm, WM97XX_ADCSEL_X, &data->x);
-+ if (rc != RC_VALID)
-+ return rc;
-+
-+ rc = wm9712_poll_sample(wm, WM97XX_ADCSEL_Y, &data->y);
-+ if (rc != RC_VALID)
-+ return rc;
-+
-+ if (pil && !five_wire) {
-+ rc = wm9712_poll_sample(wm, WM97XX_ADCSEL_PRES,
-+ &data->p);
-+ if (rc != 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);
-+ if (ret < 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 wm9712_codec = {
-+ .id = WM9712_ID2,
-+ .name = "wm9712",
-+ .poll_sample = wm9712_poll_sample,
-+ .poll_touch = wm9712_poll_touch,
-+ .acc_enable = wm9712_acc_enable,
-+ .phy_init = wm9712_phy_init,
-+ .dig_enable = wm9712_dig_enable,
-+ .dig_restore = wm9712_dig_restore,
-+ .aux_prepare = wm9712_aux_prepare,
-+};
-+EXPORT_SYMBOL_GPL(wm9712_codec);
-+
-+/* Module information */
-+MODULE_AUTHOR("Liam Girdwood <liam.girdwood@wolfsonmicro.com>");
-+MODULE_DESCRIPTION("WM9712 Touch Screen Driver");
-+MODULE_LICENSE("GPL");
---
-1.5.3.8
-
generated by cgit v1.2.3 (git 2.25.1) at 2025-01-09 23:35:38 +0000