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 | 1031 |
1 files changed, 0 insertions, 1031 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 deleted file mode 100644 index 4fed8030b3..0000000000 --- a/target/linux/omap24xx/patches-2.6.38/600-tsc2005.patch +++ /dev/null @@ -1,1031 +0,0 @@ ---- - 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(+) - ---- a/drivers/input/touchscreen/Kconfig -+++ b/drivers/input/touchscreen/Kconfig -@@ -629,6 +629,17 @@ config TOUCHSCREEN_TOUCHIT213 - 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 ---- a/drivers/input/touchscreen/Makefile -+++ b/drivers/input/touchscreen/Makefile -@@ -45,6 +45,7 @@ obj-$(CONFIG_TOUCHSCREEN_TNETV107X) += t - obj-$(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 ---- /dev/null -+++ b/drivers/input/touchscreen/tsc2005.c -@@ -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"); ---- /dev/null -+++ b/include/linux/spi/tsc2005.h -@@ -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 |