diff options
Diffstat (limited to 'target/linux/omap24xx/patches-2.6.38/600-tsc2005.patch')
| -rw-r--r-- | target/linux/omap24xx/patches-2.6.38/600-tsc2005.patch | 1039 |
1 files changed, 1039 insertions, 0 deletions
diff --git a/target/linux/omap24xx/patches-2.6.38/600-tsc2005.patch b/target/linux/omap24xx/patches-2.6.38/600-tsc2005.patch new file mode 100644 index 0000000000..b491cfa7d6 --- /dev/null +++ b/target/linux/omap24xx/patches-2.6.38/600-tsc2005.patch @@ -0,0 +1,1039 @@ +--- + drivers/input/touchscreen/Kconfig | 11 + drivers/input/touchscreen/Makefile | 1 + drivers/input/touchscreen/tsc2005.c | 958 ++++++++++++++++++++++++++++++++++++ + include/linux/spi/tsc2005.h | 30 + + 4 files changed, 1000 insertions(+) + +Index: linux-2.6.38-rc6/drivers/input/touchscreen/Kconfig +=================================================================== +--- linux-2.6.38-rc6.orig/drivers/input/touchscreen/Kconfig 2011-02-22 02:25:52.000000000 +0100 ++++ linux-2.6.38-rc6/drivers/input/touchscreen/Kconfig 2011-02-24 00:23:46.456893349 +0100 +@@ -629,6 +629,17 @@ + To compile this driver as a module, choose M here: the + module will be called touchit213. + ++config TOUCHSCREEN_TSC2005 ++ tristate "TSC2005 based touchscreens" ++ depends on SPI_MASTER ++ help ++ Say Y here if you have a TSC2005 based touchscreen. ++ ++ If unsure, say N. ++ ++ To compile this driver as a module, choose M here: the ++ module will be called tsc2005. ++ + config TOUCHSCREEN_TSC2007 + tristate "TSC2007 based touchscreens" + depends on I2C +Index: linux-2.6.38-rc6/drivers/input/touchscreen/Makefile +=================================================================== +--- linux-2.6.38-rc6.orig/drivers/input/touchscreen/Makefile 2011-02-22 02:25:52.000000000 +0100 ++++ linux-2.6.38-rc6/drivers/input/touchscreen/Makefile 2011-02-24 00:23:46.457893305 +0100 +@@ -45,6 +45,7 @@ + obj-$(CONFIG_TOUCHSCREEN_TOUCHIT213) += touchit213.o + obj-$(CONFIG_TOUCHSCREEN_TOUCHRIGHT) += touchright.o + obj-$(CONFIG_TOUCHSCREEN_TOUCHWIN) += touchwin.o ++obj-$(CONFIG_TOUCHSCREEN_TSC2005) += tsc2005.o + obj-$(CONFIG_TOUCHSCREEN_TSC2007) += tsc2007.o + obj-$(CONFIG_TOUCHSCREEN_UCB1400) += ucb1400_ts.o + obj-$(CONFIG_TOUCHSCREEN_WACOM_W8001) += wacom_w8001.o +Index: linux-2.6.38-rc6/drivers/input/touchscreen/tsc2005.c +=================================================================== +--- /dev/null 1970-01-01 00:00:00.000000000 +0000 ++++ linux-2.6.38-rc6/drivers/input/touchscreen/tsc2005.c 2011-02-24 00:23:46.459893217 +0100 +@@ -0,0 +1,958 @@ ++/* ++ * TSC2005 touchscreen driver ++ * ++ * Copyright (C) 2006-2008 Nokia Corporation ++ * ++ * Author: Lauri Leukkunen <lauri.leukkunen@nokia.com> ++ * based on TSC2301 driver by Klaus K. Pedersen <klaus.k.pedersen@nokia.com> ++ * ++ * 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. ++ * ++ * This program is distributed in the hope that it will be useful, ++ * but WITHOUT ANY WARRANTY; without even the implied warranty of ++ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the ++ * GNU General Public License for more details. ++ * ++ * You should have received a copy of the GNU General Public License ++ * along with this program; if not, write to the Free Software ++ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA ++ * ++ */ ++ ++#include <linux/kernel.h> ++#include <linux/module.h> ++#include <linux/input.h> ++#include <linux/interrupt.h> ++#include <linux/delay.h> ++#include <linux/spi/spi.h> ++ ++#include <linux/spi/tsc2005.h> ++ ++/** ++ * The touchscreen interface operates as follows: ++ * ++ * Initialize: ++ * Request access to GPIO103 (DAV) ++ * tsc2005_ts_irq_handler will trigger when DAV line goes down ++ * ++ * 1) Pen is pressed against touchscreeen ++ * 2) TSC2005 performs AD conversion ++ * 3) After the conversion is done TSC2005 drives DAV line down ++ * 4) GPIO IRQ is received and tsc2005_ts_irq_handler is called ++ * 5) tsc2005_ts_irq_handler queues up an spi transfer to fetch ++ * the x, y, z1, z2 values ++ * 6) tsc2005_ts_rx() reports coordinates to input layer and ++ * sets up tsc2005_ts_timer() to be called after TSC2005_TS_SCAN_TIME ++ * 7) When the penup_timer expires, there have not been DAV interrupts ++ * during the last 20ms which means the pen has been lifted. ++ */ ++ ++#define TSC2005_VDD_LOWER_27 ++ ++#ifdef TSC2005_VDD_LOWER_27 ++#define TSC2005_HZ (10000000) ++#else ++#define TSC2005_HZ (25000000) ++#endif ++ ++#define TSC2005_CMD (0x80) ++#define TSC2005_REG (0x00) ++ ++#define TSC2005_CMD_STOP (1) ++#define TSC2005_CMD_10BIT (0 << 2) ++#define TSC2005_CMD_12BIT (1 << 2) ++ ++#define TSC2005_CMD_SCAN_XYZZ (0 << 3) ++#define TSC2005_CMD_SCAN_XY (1 << 3) ++#define TSC2005_CMD_SCAN_X (2 << 3) ++#define TSC2005_CMD_SCAN_Y (3 << 3) ++#define TSC2005_CMD_SCAN_ZZ (4 << 3) ++#define TSC2005_CMD_AUX_SINGLE (5 << 3) ++#define TSC2005_CMD_TEMP1 (6 << 3) ++#define TSC2005_CMD_TEMP2 (7 << 3) ++#define TSC2005_CMD_AUX_CONT (8 << 3) ++#define TSC2005_CMD_TEST_X_CONN (9 << 3) ++#define TSC2005_CMD_TEST_Y_CONN (10 << 3) ++#define TSC2005_CMD_TEST_SHORT (11 << 3) ++/* command 12 reserved, according to 2008-03 erratum */ ++#define TSC2005_CMD_DRIVE_XX (13 << 3) ++#define TSC2005_CMD_DRIVE_YY (14 << 3) ++#define TSC2005_CMD_DRIVE_YX (15 << 3) ++ ++#define TSC2005_REG_X (0 << 3) ++#define TSC2005_REG_Y (1 << 3) ++#define TSC2005_REG_Z1 (2 << 3) ++#define TSC2005_REG_Z2 (3 << 3) ++#define TSC2005_REG_AUX (4 << 3) ++#define TSC2005_REG_TEMP1 (5 << 3) ++#define TSC2005_REG_TEMP2 (6 << 3) ++#define TSC2005_REG_STATUS (7 << 3) ++#define TSC2005_REG_AUX_HIGH (8 << 3) ++#define TSC2005_REG_AUX_LOW (9 << 3) ++#define TSC2005_REG_TEMP_HIGH (10 << 3) ++#define TSC2005_REG_TEMP_LOW (11 << 3) ++#define TSC2005_REG_CFR0 (12 << 3) ++#define TSC2005_REG_CFR1 (13 << 3) ++#define TSC2005_REG_CFR2 (14 << 3) ++#define TSC2005_REG_FUNCTION (15 << 3) ++ ++#define TSC2005_REG_PND0 (1 << 1) ++#define TSC2005_REG_READ (0x01) ++#define TSC2005_REG_WRITE (0x00) ++ ++ ++#define TSC2005_CFR0_LONGSAMPLING (1) ++#define TSC2005_CFR0_DETECTINWAIT (1 << 1) ++#define TSC2005_CFR0_SENSETIME_32US (0) ++#define TSC2005_CFR0_SENSETIME_96US (1 << 2) ++#define TSC2005_CFR0_SENSETIME_544US (1 << 3) ++#define TSC2005_CFR0_SENSETIME_2080US (1 << 4) ++#define TSC2005_CFR0_SENSETIME_2656US (0x001C) ++#define TSC2005_CFR0_PRECHARGE_20US (0x0000) ++#define TSC2005_CFR0_PRECHARGE_84US (0x0020) ++#define TSC2005_CFR0_PRECHARGE_276US (0x0040) ++#define TSC2005_CFR0_PRECHARGE_1044US (0x0080) ++#define TSC2005_CFR0_PRECHARGE_1364US (0x00E0) ++#define TSC2005_CFR0_STABTIME_0US (0x0000) ++#define TSC2005_CFR0_STABTIME_100US (0x0100) ++#define TSC2005_CFR0_STABTIME_500US (0x0200) ++#define TSC2005_CFR0_STABTIME_1MS (0x0300) ++#define TSC2005_CFR0_STABTIME_5MS (0x0400) ++#define TSC2005_CFR0_STABTIME_100MS (0x0700) ++#define TSC2005_CFR0_CLOCK_4MHZ (0x0000) ++#define TSC2005_CFR0_CLOCK_2MHZ (0x0800) ++#define TSC2005_CFR0_CLOCK_1MHZ (0x1000) ++#define TSC2005_CFR0_RESOLUTION12 (0x2000) ++#define TSC2005_CFR0_STATUS (0x4000) ++#define TSC2005_CFR0_PENMODE (0x8000) ++ ++#define TSC2005_CFR0_INITVALUE (TSC2005_CFR0_STABTIME_1MS | \ ++ TSC2005_CFR0_CLOCK_1MHZ | \ ++ TSC2005_CFR0_RESOLUTION12 | \ ++ TSC2005_CFR0_PRECHARGE_276US | \ ++ TSC2005_CFR0_PENMODE) ++ ++/* Bits common to both read and write of config register 0 */ ++#define TSC2005_CFR0_RW_MASK 0x3fff ++ ++#define TSC2005_CFR1_BATCHDELAY_0MS (0x0000) ++#define TSC2005_CFR1_BATCHDELAY_1MS (0x0001) ++#define TSC2005_CFR1_BATCHDELAY_2MS (0x0002) ++#define TSC2005_CFR1_BATCHDELAY_4MS (0x0003) ++#define TSC2005_CFR1_BATCHDELAY_10MS (0x0004) ++#define TSC2005_CFR1_BATCHDELAY_20MS (0x0005) ++#define TSC2005_CFR1_BATCHDELAY_40MS (0x0006) ++#define TSC2005_CFR1_BATCHDELAY_100MS (0x0007) ++ ++#define TSC2005_CFR1_INITVALUE (TSC2005_CFR1_BATCHDELAY_4MS) ++ ++#define TSC2005_CFR2_MAVE_TEMP (0x0001) ++#define TSC2005_CFR2_MAVE_AUX (0x0002) ++#define TSC2005_CFR2_MAVE_Z (0x0004) ++#define TSC2005_CFR2_MAVE_Y (0x0008) ++#define TSC2005_CFR2_MAVE_X (0x0010) ++#define TSC2005_CFR2_AVG_1 (0x0000) ++#define TSC2005_CFR2_AVG_3 (0x0400) ++#define TSC2005_CFR2_AVG_7 (0x0800) ++#define TSC2005_CFR2_MEDIUM_1 (0x0000) ++#define TSC2005_CFR2_MEDIUM_3 (0x1000) ++#define TSC2005_CFR2_MEDIUM_7 (0x2000) ++#define TSC2005_CFR2_MEDIUM_15 (0x3000) ++ ++#define TSC2005_CFR2_IRQ_MASK (0xC000) ++#define TSC2005_CFR2_IRQ_DAV (0x4000) ++#define TSC2005_CFR2_IRQ_PEN (0x8000) ++#define TSC2005_CFR2_IRQ_PENDAV (0x0000) ++ ++#define TSC2005_CFR2_INITVALUE (TSC2005_CFR2_IRQ_PENDAV | \ ++ TSC2005_CFR2_MAVE_X | \ ++ TSC2005_CFR2_MAVE_Y | \ ++ TSC2005_CFR2_MAVE_Z | \ ++ TSC2005_CFR2_MEDIUM_15 | \ ++ TSC2005_CFR2_AVG_7) ++ ++#define MAX_12BIT ((1 << 12) - 1) ++#define TS_SAMPLES 4 ++#define TSC2005_TS_PENUP_TIME 40 ++ ++static const u32 tsc2005_read_reg[] = { ++ (TSC2005_REG | TSC2005_REG_X | TSC2005_REG_READ) << 16, ++ (TSC2005_REG | TSC2005_REG_Y | TSC2005_REG_READ) << 16, ++ (TSC2005_REG | TSC2005_REG_Z1 | TSC2005_REG_READ) << 16, ++ (TSC2005_REG | TSC2005_REG_Z2 | TSC2005_REG_READ) << 16, ++}; ++#define NUM_READ_REGS (sizeof(tsc2005_read_reg)/sizeof(tsc2005_read_reg[0])) ++ ++struct tsc2005 { ++ struct spi_device *spi; ++ ++ struct input_dev *idev; ++ char phys[32]; ++ struct timer_list penup_timer; ++ ++ /* ESD recovery via a hardware reset if the tsc2005 ++ * doesn't respond after a configurable period (in ms) of ++ * IRQ/SPI inactivity. If esd_timeout is 0, timer and work ++ * fields are used. ++ */ ++ u32 esd_timeout; ++ struct timer_list esd_timer; ++ struct work_struct esd_work; ++ ++ spinlock_t lock; ++ struct mutex mutex; ++ ++ struct spi_message read_msg; ++ struct spi_transfer read_xfer[NUM_READ_REGS]; ++ u32 data[NUM_READ_REGS]; ++ ++ /* previously reported x,y,p (if pen_down) */ ++ int out_x; ++ int out_y; ++ int out_p; ++ /* fudge parameters - changes must exceed one of these. */ ++ int fudge_x; ++ int fudge_y; ++ int fudge_p; ++ /* raw copy of previous x,y,z */ ++ int in_x; ++ int in_y; ++ int in_z1; ++ int in_z2; ++ /* average accumulators for each component */ ++ int sample_cnt; ++ int avg_x; ++ int avg_y; ++ int avg_z1; ++ int avg_z2; ++ /* configuration */ ++ int x_plate_ohm; ++ int hw_avg_max; ++ int stab_time; ++ int p_max; ++ int touch_pressure; ++ /* status */ ++ u8 sample_sent; ++ u8 pen_down; ++ u8 disabled; ++ u8 disable_depth; ++ u8 spi_pending; ++ ++ void (*set_reset)(bool enable); ++}; ++ ++static void tsc2005_cmd(struct tsc2005 *ts, u8 cmd) ++{ ++ u8 data = TSC2005_CMD | TSC2005_CMD_12BIT | cmd; ++ struct spi_message msg; ++ struct spi_transfer xfer = { 0 }; ++ ++ xfer.tx_buf = &data; ++ xfer.rx_buf = NULL; ++ xfer.len = 1; ++ xfer.bits_per_word = 8; ++ ++ spi_message_init(&msg); ++ spi_message_add_tail(&xfer, &msg); ++ spi_sync(ts->spi, &msg); ++} ++ ++static void tsc2005_write(struct tsc2005 *ts, u8 reg, u16 value) ++{ ++ u32 tx; ++ struct spi_message msg; ++ struct spi_transfer xfer = { 0 }; ++ ++ tx = (TSC2005_REG | reg | TSC2005_REG_PND0 | ++ TSC2005_REG_WRITE) << 16; ++ tx |= value; ++ ++ xfer.tx_buf = &tx; ++ xfer.rx_buf = NULL; ++ xfer.len = 4; ++ xfer.bits_per_word = 24; ++ ++ spi_message_init(&msg); ++ spi_message_add_tail(&xfer, &msg); ++ spi_sync(ts->spi, &msg); ++} ++ ++static void tsc2005_read(struct tsc2005 *ts, u8 reg, u16 *value) ++{ ++ u32 tx; ++ u32 rx = 0; ++ struct spi_message msg; ++ struct spi_transfer xfer = { 0 }; ++ ++ tx = (TSC2005_REG | reg | TSC2005_REG_READ) << 16; ++ ++ xfer.tx_buf = &tx; ++ xfer.rx_buf = ℞ ++ xfer.len = 4; ++ xfer.bits_per_word = 24; ++ ++ spi_message_init(&msg); ++ spi_message_add_tail(&xfer, &msg); ++ spi_sync(ts->spi, &msg); ++ *value = rx; ++} ++ ++static void tsc2005_ts_update_pen_state(struct tsc2005 *ts, ++ int x, int y, int pressure) ++{ ++ if (pressure) { ++ input_report_abs(ts->idev, ABS_X, x); ++ input_report_abs(ts->idev, ABS_Y, y); ++ input_report_abs(ts->idev, ABS_PRESSURE, pressure); ++ if (!ts->pen_down) { ++ input_report_key(ts->idev, BTN_TOUCH, 1); ++ ts->pen_down = 1; ++ } ++ } else { ++ input_report_abs(ts->idev, ABS_PRESSURE, 0); ++ if (ts->pen_down) { ++ input_report_key(ts->idev, BTN_TOUCH, 0); ++ ts->pen_down = 0; ++ } ++ } ++ ++ input_sync(ts->idev); ++} ++ ++/* ++ * This function is called by the SPI framework after the coordinates ++ * have been read from TSC2005 ++ */ ++static void tsc2005_ts_rx(void *arg) ++{ ++ struct tsc2005 *ts = arg; ++ unsigned long flags; ++ int inside_rect, pressure_limit; ++ int x, y, z1, z2, pressure; ++ ++ spin_lock_irqsave(&ts->lock, flags); ++ ++ if (ts->disable_depth) { ++ ts->spi_pending = 0; ++ goto out; ++ } ++ ++ x = ts->data[0]; ++ y = ts->data[1]; ++ z1 = ts->data[2]; ++ z2 = ts->data[3]; ++ ++ /* validate pressure and position */ ++ if (x > MAX_12BIT || y > MAX_12BIT) ++ goto out; ++ ++ /* skip coords if the pressure-components are out of range */ ++ if (z1 < 100 || z2 > MAX_12BIT || z1 >= z2) ++ goto out; ++ ++ /* skip point if this is a pen down with the exact same values as ++ * the value before pen-up - that implies SPI fed us stale data ++ */ ++ if (!ts->pen_down && ++ ts->in_x == x && ++ ts->in_y == y && ++ ts->in_z1 == z1 && ++ ts->in_z2 == z2) ++ goto out; ++ ++ /* At this point we are happy we have a valid and useful reading. ++ * Remember it for later comparisons. We may now begin downsampling ++ */ ++ ts->in_x = x; ++ ts->in_y = y; ++ ts->in_z1 = z1; ++ ts->in_z2 = z2; ++ ++ /* don't run average on the "pen down" event */ ++ if (ts->sample_sent) { ++ ts->avg_x += x; ++ ts->avg_y += y; ++ ts->avg_z1 += z1; ++ ts->avg_z2 += z2; ++ ++ if (++ts->sample_cnt < TS_SAMPLES) ++ goto out; ++ ++ x = ts->avg_x / TS_SAMPLES; ++ y = ts->avg_y / TS_SAMPLES; ++ z1 = ts->avg_z1 / TS_SAMPLES; ++ z2 = ts->avg_z2 / TS_SAMPLES; ++ } ++ ++ ts->sample_cnt = 0; ++ ts->avg_x = 0; ++ ts->avg_y = 0; ++ ts->avg_z1 = 0; ++ ts->avg_z2 = 0; ++ ++ pressure = x * (z2 - z1) / z1; ++ pressure = pressure * ts->x_plate_ohm / 4096; ++ ++ pressure_limit = ts->sample_sent ? ts->p_max : ts->touch_pressure; ++ if (pressure > pressure_limit) ++ goto out; ++ ++ /* Discard the event if it still is within the previous rect - ++ * unless the pressure is clearly harder, but then use previous ++ * x,y position. If any coordinate deviates enough, fudging ++ * of all three will still take place in the input layer. ++ */ ++ inside_rect = (ts->sample_sent && ++ x > (int)ts->out_x - ts->fudge_x && ++ x < (int)ts->out_x + ts->fudge_x && ++ y > (int)ts->out_y - ts->fudge_y && ++ y < (int)ts->out_y + ts->fudge_y); ++ if (inside_rect) ++ x = ts->out_x, y = ts->out_y; ++ ++ if (!inside_rect || pressure < (ts->out_p - ts->fudge_p)) { ++ tsc2005_ts_update_pen_state(ts, x, y, pressure); ++ ts->sample_sent = 1; ++ ts->out_x = x; ++ ts->out_y = y; ++ ts->out_p = pressure; ++ } ++out: ++ if (ts->spi_pending > 1) { ++ /* One or more interrupts (sometimes several dozens) ++ * occured while waiting for the SPI read - get ++ * another read going. ++ */ ++ ts->spi_pending = 1; ++ if (spi_async(ts->spi, &ts->read_msg)) { ++ dev_err(&ts->spi->dev, "ts: spi_async() failed"); ++ ts->spi_pending = 0; ++ } ++ } else ++ ts->spi_pending = 0; ++ ++ /* kick pen up timer - to make sure it expires again(!) */ ++ if (ts->sample_sent) { ++ mod_timer(&ts->penup_timer, ++ jiffies + msecs_to_jiffies(TSC2005_TS_PENUP_TIME)); ++ /* Also kick the watchdog, as we still think we're alive */ ++ if (ts->esd_timeout && ts->disable_depth == 0) { ++ unsigned long wdj = msecs_to_jiffies(ts->esd_timeout); ++ mod_timer(&ts->esd_timer, round_jiffies(jiffies+wdj)); ++ } ++ } ++ spin_unlock_irqrestore(&ts->lock, flags); ++} ++ ++/* This penup timer is very forgiving of delayed SPI reads. The ++ * (ESD) watchdog will rescue us if spi_pending remains set, unless ++ * we are enterring the disabled state. In that case we must just ++ * handle the pen up, and let disabling complete. ++ */ ++static void tsc2005_ts_penup_timer_handler(unsigned long data) ++{ ++ struct tsc2005 *ts = (struct tsc2005 *)data; ++ if ((!ts->spi_pending || ts->disable_depth) && ++ ts->sample_sent) { ++ tsc2005_ts_update_pen_state(ts, 0, 0, 0); ++ ts->sample_sent = 0; ++ } ++} ++ ++/* ++ * This interrupt is called when pen is down and coordinates are ++ * available. That is indicated by a either: ++ * a) a rising edge on PINTDAV or (PENDAV mode) ++ * b) a falling edge on DAV line (DAV mode) ++ * depending on the setting of the IRQ bits in the CFR2 setting above. ++ */ ++static irqreturn_t tsc2005_ts_irq_handler(int irq, void *dev_id) ++{ ++ struct tsc2005 *ts = dev_id; ++ if (ts->disable_depth) ++ goto out; ++ ++ if (!ts->spi_pending) { ++ if (spi_async(ts->spi, &ts->read_msg)) { ++ dev_err(&ts->spi->dev, "ts: spi_async() failed"); ++ goto out; ++ } ++ } ++ /* By shifting in 1s we can never wrap */ ++ ts->spi_pending = (ts->spi_pending<<1)+1; ++ ++ /* Kick pen up timer only if it's not been started yet. Strictly, ++ * it isn't even necessary to start it at all here, but doing so ++ * keeps an equivalence between pen state and timer state. ++ * The SPI read loop will keep pushing it into the future. ++ * If it times out with an SPI pending, it's ignored anyway. ++ */ ++ if (!timer_pending(&ts->penup_timer)) { ++ unsigned long pu = msecs_to_jiffies(TSC2005_TS_PENUP_TIME); ++ ts->penup_timer.expires = jiffies + pu; ++ add_timer(&ts->penup_timer); ++ } ++out: ++ return IRQ_HANDLED; ++} ++ ++static void tsc2005_ts_setup_spi_xfer(struct tsc2005 *ts) ++{ ++ struct spi_message *m = &ts->read_msg; ++ struct spi_transfer *x = &ts->read_xfer[0]; ++ int i; ++ ++ spi_message_init(m); ++ ++ for (i = 0; i < NUM_READ_REGS; i++, x++) { ++ x->tx_buf = &tsc2005_read_reg[i]; ++ x->rx_buf = &ts->data[i]; ++ x->len = 4; ++ x->bits_per_word = 24; ++ x->cs_change = i < (NUM_READ_REGS - 1); ++ spi_message_add_tail(x, m); ++ } ++ ++ m->complete = tsc2005_ts_rx; ++ m->context = ts; ++} ++ ++static ssize_t tsc2005_ts_pen_down_show(struct device *dev, ++ struct device_attribute *attr, ++ char *buf) ++{ ++ struct tsc2005 *ts = dev_get_drvdata(dev); ++ ++ return sprintf(buf, "%u\n", ts->pen_down); ++} ++ ++static DEVICE_ATTR(pen_down, S_IRUGO, tsc2005_ts_pen_down_show, NULL); ++ ++static int tsc2005_configure(struct tsc2005 *ts, int flags) ++{ ++ tsc2005_write(ts, TSC2005_REG_CFR0, TSC2005_CFR0_INITVALUE); ++ tsc2005_write(ts, TSC2005_REG_CFR1, TSC2005_CFR1_INITVALUE); ++ tsc2005_write(ts, TSC2005_REG_CFR2, TSC2005_CFR2_INITVALUE); ++ tsc2005_cmd(ts, flags); ++ ++ return 0; ++} ++ ++static void tsc2005_start_scan(struct tsc2005 *ts) ++{ ++ tsc2005_configure(ts, TSC2005_CMD_SCAN_XYZZ); ++} ++ ++static void tsc2005_stop_scan(struct tsc2005 *ts) ++{ ++ tsc2005_cmd(ts, TSC2005_CMD_STOP); ++} ++ ++/* Must be called with mutex held */ ++static void tsc2005_disable(struct tsc2005 *ts) ++{ ++ if (ts->disable_depth++ != 0) ++ return; ++ ++ disable_irq(ts->spi->irq); ++ if (ts->esd_timeout) ++ del_timer(&ts->esd_timer); ++ ++ /* wait until penup timer expire normally */ ++ do { ++ msleep(4); ++ } while (ts->sample_sent); ++ ++ tsc2005_stop_scan(ts); ++} ++ ++static void tsc2005_enable(struct tsc2005 *ts) ++{ ++ if (ts->disable_depth != 1) ++ goto out; ++ ++ if (ts->esd_timeout) { ++ unsigned long wdj = msecs_to_jiffies(ts->esd_timeout); ++ ts->esd_timer.expires = round_jiffies(jiffies+wdj); ++ add_timer(&ts->esd_timer); ++ } ++ tsc2005_start_scan(ts); ++ enable_irq(ts->spi->irq); ++out: ++ --ts->disable_depth; ++} ++ ++static ssize_t tsc2005_disable_show(struct device *dev, ++ struct device_attribute *attr, char *buf) ++{ ++ struct tsc2005 *ts = dev_get_drvdata(dev); ++ ++ return sprintf(buf, "%u\n", ts->disabled); ++} ++ ++static ssize_t tsc2005_disable_store(struct device *dev, ++ struct device_attribute *attr, ++ const char *buf, size_t count) ++{ ++ struct tsc2005 *ts = dev_get_drvdata(dev); ++ unsigned long res; ++ int i; ++ ++ if (strict_strtoul(buf, 10, &res) < 0) ++ return -EINVAL; ++ i = res ? 1 : 0; ++ ++ mutex_lock(&ts->mutex); ++ if (i == ts->disabled) ++ goto out; ++ ts->disabled = i; ++ ++ if (i) ++ tsc2005_disable(ts); ++ else ++ tsc2005_enable(ts); ++out: ++ mutex_unlock(&ts->mutex); ++ return count; ++} ++ ++static DEVICE_ATTR(disable_ts, 0664, tsc2005_disable_show, ++ tsc2005_disable_store); ++ ++static ssize_t tsc2005_ctrl_selftest_show(struct device *dev, ++ struct device_attribute *attr, ++ char *buf) ++{ ++ u16 temp_high_orig, temp_high_test, temp_high; ++ unsigned int result = 1; ++ struct tsc2005 *ts = dev_get_drvdata(dev); ++ ++ if (!ts->set_reset) { ++ dev_warn(&ts->spi->dev, ++ "unable to selftest: reset not configured\n"); ++ result = 0; ++ goto out; ++ } ++ ++ mutex_lock(&ts->mutex); ++ tsc2005_disable(ts); ++ ++ /* Test ctrl communications via temp high / low registers */ ++ tsc2005_read(ts, TSC2005_REG_TEMP_HIGH, &temp_high_orig); ++ ++ temp_high_test = (temp_high_orig - 1) & 0x0FFF; ++ ++ tsc2005_write(ts, TSC2005_REG_TEMP_HIGH, temp_high_test); ++ ++ tsc2005_read(ts, TSC2005_REG_TEMP_HIGH, &temp_high); ++ ++ if (temp_high != temp_high_test) { ++ result = 0; ++ dev_warn(dev, "selftest failed: %d != %d\n", ++ temp_high, temp_high_test); ++ } ++ ++ /* HW Reset */ ++ ts->set_reset(0); ++ msleep(1); /* only 10us required */ ++ ts->set_reset(1); ++ ++ tsc2005_enable(ts); ++ ++ /* Test that reset really happened */ ++ tsc2005_read(ts, TSC2005_REG_TEMP_HIGH, &temp_high); ++ ++ if (temp_high != temp_high_orig) { ++ result = 0; ++ dev_warn(dev, "selftest failed after reset: " ++ "%d != %d\n", ++ temp_high, temp_high_orig); ++ } ++ ++ mutex_unlock(&ts->mutex); ++ ++out: ++ return sprintf(buf, "%u\n", result); ++} ++ ++static DEVICE_ATTR(ts_ctrl_selftest, S_IRUGO, tsc2005_ctrl_selftest_show, NULL); ++ ++static void tsc2005_esd_timer_handler(unsigned long data) ++{ ++ struct tsc2005 *ts = (struct tsc2005 *)data; ++ if (!ts->disable_depth) ++ schedule_work(&ts->esd_work); ++} ++ ++static void tsc2005_rst_handler(struct work_struct *work) ++{ ++ u16 reg_val; ++ struct tsc2005 *ts = container_of(work, struct tsc2005, esd_work); ++ unsigned long wdj; ++ ++ mutex_lock(&ts->mutex); ++ ++ /* If we are disabled, or the a touch has been detected, ++ * then ignore this timeout. The enable will restart the ++ * watchdog, as it restarts scanning ++ */ ++ if (ts->disable_depth) ++ goto out; ++ ++ /* If we cannot read our known value from configuration register 0 ++ * then reset the controller as if from power-up and start ++ * scanning again. Always re-arm the watchdog. ++ */ ++ tsc2005_read(ts, TSC2005_REG_CFR0, ®_val); ++ if ((reg_val ^ TSC2005_CFR0_INITVALUE) & TSC2005_CFR0_RW_MASK) { ++ dev_info(&ts->spi->dev, "TSC not responding, resetting.\n"); ++ /* If this timer kicked in, the penup timer, if ever active ++ * at all, must have expired ages ago, so no need to del it. ++ */ ++ ts->set_reset(0); ++ if (ts->sample_sent) { ++ tsc2005_ts_update_pen_state(ts, 0, 0, 0); ++ ts->sample_sent = 0; ++ } ++ ts->spi_pending = 0; ++ msleep(1); /* only 10us required */ ++ ts->set_reset(1); ++ tsc2005_start_scan(ts); ++ } ++ wdj = msecs_to_jiffies(ts->esd_timeout); ++ mod_timer(&ts->esd_timer, round_jiffies(jiffies+wdj)); ++ ++out: ++ mutex_unlock(&ts->mutex); ++} ++ ++static int __devinit tsc2005_ts_init(struct tsc2005 *ts, ++ struct tsc2005_platform_data *pdata) ++{ ++ struct input_dev *idev; ++ int r; ++ int x_max, y_max; ++ ++ init_timer(&ts->penup_timer); ++ setup_timer(&ts->penup_timer, tsc2005_ts_penup_timer_handler, ++ (unsigned long)ts); ++ ++ spin_lock_init(&ts->lock); ++ mutex_init(&ts->mutex); ++ ++ ts->x_plate_ohm = pdata->ts_x_plate_ohm ? : 280; ++ ts->hw_avg_max = pdata->ts_hw_avg; ++ ts->stab_time = pdata->ts_stab_time; ++ x_max = pdata->ts_x_max ? : 4096; ++ ts->fudge_x = pdata->ts_x_fudge ? : 4; ++ y_max = pdata->ts_y_max ? : 4096; ++ ts->fudge_y = pdata->ts_y_fudge ? : 8; ++ ts->p_max = pdata->ts_pressure_max ? : MAX_12BIT; ++ ts->touch_pressure = pdata->ts_touch_pressure ? : ts->p_max; ++ ts->fudge_p = pdata->ts_pressure_fudge ? : 2; ++ ++ ts->set_reset = pdata->set_reset; ++ ++ idev = input_allocate_device(); ++ if (idev == NULL) { ++ r = -ENOMEM; ++ goto err1; ++ } ++ ++ idev->name = "TSC2005 touchscreen"; ++ snprintf(ts->phys, sizeof(ts->phys), "%s/input-ts", ++ dev_name(&ts->spi->dev)); ++ idev->phys = ts->phys; ++ ++ idev->evbit[0] = BIT(EV_ABS) | BIT(EV_KEY); ++ idev->absbit[0] = BIT(ABS_X) | BIT(ABS_Y) | BIT(ABS_PRESSURE); ++ idev->keybit[BIT_WORD(BTN_TOUCH)] = BIT_MASK(BTN_TOUCH); ++ ts->idev = idev; ++ ++ tsc2005_ts_setup_spi_xfer(ts); ++ ++ input_set_abs_params(idev, ABS_X, 0, x_max, ts->fudge_x, 0); ++ input_set_abs_params(idev, ABS_Y, 0, y_max, ts->fudge_y, 0); ++ input_set_abs_params(idev, ABS_PRESSURE, 0, ts->p_max, ts->fudge_p, 0); ++ ++ tsc2005_start_scan(ts); ++ ++ r = request_irq(ts->spi->irq, tsc2005_ts_irq_handler, ++ (((TSC2005_CFR2_INITVALUE & TSC2005_CFR2_IRQ_MASK) == ++ TSC2005_CFR2_IRQ_PENDAV) ++ ? IRQF_TRIGGER_RISING ++ : IRQF_TRIGGER_FALLING) | ++ IRQF_DISABLED, "tsc2005", ts); ++ if (r < 0) { ++ dev_err(&ts->spi->dev, "unable to get DAV IRQ"); ++ goto err2; ++ } ++ ++ set_irq_wake(ts->spi->irq, 1); ++ ++ r = input_register_device(idev); ++ if (r < 0) { ++ dev_err(&ts->spi->dev, "can't register touchscreen device\n"); ++ goto err3; ++ } ++ ++ /* We can tolerate these failing */ ++ r = device_create_file(&ts->spi->dev, &dev_attr_ts_ctrl_selftest); ++ if (r < 0) ++ dev_warn(&ts->spi->dev, "can't create sysfs file for %s: %d\n", ++ dev_attr_ts_ctrl_selftest.attr.name, r); ++ ++ r = device_create_file(&ts->spi->dev, &dev_attr_pen_down); ++ if (r < 0) ++ dev_warn(&ts->spi->dev, "can't create sysfs file for %s: %d\n", ++ dev_attr_pen_down.attr.name, r); ++ ++ r = device_create_file(&ts->spi->dev, &dev_attr_disable_ts); ++ if (r < 0) ++ dev_warn(&ts->spi->dev, "can't create sysfs file for %s: %d\n", ++ dev_attr_disable_ts.attr.name, r); ++ ++ /* Finally, configure and start the optional EDD watchdog. */ ++ ts->esd_timeout = pdata->esd_timeout; ++ if (ts->esd_timeout && ts->set_reset) { ++ unsigned long wdj; ++ setup_timer(&ts->esd_timer, tsc2005_esd_timer_handler, ++ (unsigned long)ts); ++ INIT_WORK(&ts->esd_work, tsc2005_rst_handler); ++ wdj = msecs_to_jiffies(ts->esd_timeout); ++ ts->esd_timer.expires = round_jiffies(jiffies+wdj); ++ add_timer(&ts->esd_timer); ++ } ++ ++ return 0; ++err3: ++ free_irq(ts->spi->irq, ts); ++err2: ++ tsc2005_stop_scan(ts); ++ input_free_device(idev); ++err1: ++ return r; ++} ++ ++static int __devinit tsc2005_probe(struct spi_device *spi) ++{ ++ struct tsc2005 *ts; ++ struct tsc2005_platform_data *pdata = spi->dev.platform_data; ++ int r; ++ ++ if (spi->irq < 0) { ++ dev_dbg(&spi->dev, "no irq?\n"); ++ return -ENODEV; ++ } ++ if (!pdata) { ++ dev_dbg(&spi->dev, "no platform data?\n"); ++ return -ENODEV; ++ } ++ ++ ts = kzalloc(sizeof(*ts), GFP_KERNEL); ++ if (ts == NULL) ++ return -ENOMEM; ++ ++ dev_set_drvdata(&spi->dev, ts); ++ ts->spi = spi; ++ spi->dev.power.power_state = PMSG_ON; ++ ++ spi->mode = SPI_MODE_0; ++ spi->bits_per_word = 8; ++ /* The max speed might've been defined by the board-specific ++ * struct */ ++ if (!spi->max_speed_hz) ++ spi->max_speed_hz = TSC2005_HZ; ++ ++ spi_setup(spi); ++ ++ r = tsc2005_ts_init(ts, pdata); ++ if (r) ++ goto err1; ++ ++ return 0; ++ ++err1: ++ kfree(ts); ++ return r; ++} ++ ++static int __devexit tsc2005_remove(struct spi_device *spi) ++{ ++ struct tsc2005 *ts = dev_get_drvdata(&spi->dev); ++ ++ mutex_lock(&ts->mutex); ++ tsc2005_disable(ts); ++ mutex_unlock(&ts->mutex); ++ ++ device_remove_file(&ts->spi->dev, &dev_attr_disable_ts); ++ device_remove_file(&ts->spi->dev, &dev_attr_pen_down); ++ device_remove_file(&ts->spi->dev, &dev_attr_ts_ctrl_selftest); ++ ++ free_irq(ts->spi->irq, ts); ++ input_unregister_device(ts->idev); ++ ++ if (ts->esd_timeout) ++ del_timer(&ts->esd_timer); ++ kfree(ts); ++ ++ return 0; ++} ++ ++#ifdef CONFIG_PM ++static int tsc2005_suspend(struct spi_device *spi, pm_message_t mesg) ++{ ++ struct tsc2005 *ts = dev_get_drvdata(&spi->dev); ++ ++ mutex_lock(&ts->mutex); ++ tsc2005_disable(ts); ++ mutex_unlock(&ts->mutex); ++ ++ return 0; ++} ++ ++static int tsc2005_resume(struct spi_device *spi) ++{ ++ struct tsc2005 *ts = dev_get_drvdata(&spi->dev); ++ ++ mutex_lock(&ts->mutex); ++ tsc2005_enable(ts); ++ mutex_unlock(&ts->mutex); ++ ++ return 0; ++} ++#endif ++ ++static struct spi_driver tsc2005_driver = { ++ .driver = { ++ .name = "tsc2005", ++ .owner = THIS_MODULE, ++ }, ++#ifdef CONFIG_PM ++ .suspend = tsc2005_suspend, ++ .resume = tsc2005_resume, ++#endif ++ .probe = tsc2005_probe, ++ .remove = __devexit_p(tsc2005_remove), ++}; ++ ++static int __init tsc2005_init(void) ++{ ++ printk(KERN_INFO "TSC2005 driver initializing\n"); ++ ++ return spi_register_driver(&tsc2005_driver); ++} ++module_init(tsc2005_init); ++ ++static void __exit tsc2005_exit(void) ++{ ++ spi_unregister_driver(&tsc2005_driver); ++} ++module_exit(tsc2005_exit); ++ ++MODULE_AUTHOR("Lauri Leukkunen <lauri.leukkunen@nokia.com>"); ++MODULE_LICENSE("GPL"); ++MODULE_ALIAS("platform:tsc2005"); +Index: linux-2.6.38-rc6/include/linux/spi/tsc2005.h +=================================================================== +--- /dev/null 1970-01-01 00:00:00.000000000 +0000 ++++ linux-2.6.38-rc6/include/linux/spi/tsc2005.h 2011-02-24 00:23:46.459893217 +0100 +@@ -0,0 +1,30 @@ ++#ifndef _LINUX_SPI_TSC2005_H ++#define _LINUX_SPI_TSC2005_H ++ ++#include <linux/types.h> ++ ++struct tsc2005_platform_data { ++ u16 ts_x_plate_ohm; ++ u32 ts_stab_time; /* voltage settling time */ ++ u8 ts_hw_avg; /* HW assiseted averaging. Can be ++ 0, 4, 8, 16 samples per reading */ ++ u32 ts_touch_pressure; /* Pressure limit until we report a ++ touch event. After that we switch ++ to ts_max_pressure. */ ++ u32 ts_pressure_max;/* Samples with bigger pressure value will ++ be ignored, since the corresponding X, Y ++ values are unreliable */ ++ u32 ts_pressure_fudge; ++ u32 ts_x_max; ++ u32 ts_x_fudge; ++ u32 ts_y_max; ++ u32 ts_y_fudge; ++ ++ u32 esd_timeout; /* msec of inactivity before we check */ ++ ++ unsigned ts_ignore_last:1; ++ ++ void (*set_reset)(bool enable); ++}; ++ ++#endif |