--- /dev/null
+/*
+ * drivers/hwmon/tsc210x_sensors.c
+ *
+ * hwmon interface for TSC210X sensors
+ *
+ * Copyright (c) 2005-2007 Andrzej Zaborowski <balrog@zabor.org>
+ *
+ * This package 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 package 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 package; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+#include <linux/init.h>
+#include <linux/err.h>
+#include <linux/hwmon.h>
+#include <linux/hwmon-sysfs.h>
+#include <linux/platform_device.h>
+#include <linux/spinlock.h>
+#include <linux/autoconf.h>
+#ifdef CONFIG_APM
+# include <linux/apm-emulation.h>
+#endif
+
+#include <linux/spi/tsc210x.h>
+
+struct tsc210x_hwmon {
+ int bat[2], aux[2], temp[2];
+
+ struct class_device *dev;
+ struct tsc210x_config *pdata;
+#ifdef CONFIG_APM
+ spinlock_t apm_lock;
+#endif
+};
+
+#ifdef CONFIG_APM
+# define apm_lock() spin_lock(&hwmon->apm_lock)
+# define apm_unlock() spin_unlock(&hwmon->apm_lock)
+#else
+# define apm_lock()
+# define apm_unlock()
+#endif
+
+static void tsc210x_ports(struct tsc210x_hwmon *hwmon, int bat[], int aux[])
+{
+ apm_lock();
+ hwmon->bat[0] = bat[0];
+ hwmon->bat[1] = bat[1];
+ hwmon->aux[0] = aux[0];
+ hwmon->aux[1] = aux[1];
+ apm_unlock();
+}
+
+static void tsc210x_temp1(struct tsc210x_hwmon *hwmon, int temp)
+{
+ apm_lock();
+ hwmon->temp[0] = temp;
+ apm_unlock();
+}
+
+static void tsc210x_temp2(struct tsc210x_hwmon *hwmon, int temp)
+{
+ apm_lock();
+ hwmon->temp[1] = temp;
+ apm_unlock();
+}
+
+#define TSC210X_INPUT(devname, field) \
+static ssize_t tsc_show_ ## devname(struct device *dev, \
+ struct device_attribute *devattr, char *buf) \
+{ \
+ struct tsc210x_hwmon *hwmon = (struct tsc210x_hwmon *) \
+ platform_get_drvdata(to_platform_device(dev)); \
+ return sprintf(buf, "%i\n", hwmon->field); \
+} \
+static DEVICE_ATTR(devname ## _input, S_IRUGO, tsc_show_ ## devname, NULL);
+
+TSC210X_INPUT(in0, bat[0])
+TSC210X_INPUT(in1, bat[1])
+TSC210X_INPUT(in2, aux[0])
+TSC210X_INPUT(in3, aux[1])
+TSC210X_INPUT(in4, temp[0])
+TSC210X_INPUT(in5, temp[1])
+
+static ssize_t tsc_show_temp1(struct device *dev,
+ struct device_attribute *devattr, char *buf)
+{
+ struct tsc210x_hwmon *hwmon = (struct tsc210x_hwmon *)
+ platform_get_drvdata(to_platform_device(dev));
+ int t1, t2;
+ int diff, value;
+
+ t1 = hwmon->temp[0];
+ t2 = hwmon->temp[1];
+
+ /*
+ * Use method #2 (differential) to calculate current temperature.
+ * The difference between TEMP2 and TEMP1 input values is
+ * multiplied by a constant to obtain current temperature.
+ * To find this constant we use the values measured at 25 C as
+ * thermometer calibration data.
+ *
+ * 298150 is 25 degrees Celcius represented in Kelvins and
+ * multiplied by 1000 for fixed point precision (273.15 + 25).
+ * 273150 is zero degrees Celcius.
+ */
+ diff = hwmon->pdata->temp_at25c[1] - hwmon->pdata->temp_at25c[0];
+ BUG_ON(diff == 0);
+ value = (t2 - t1) * 298150 / diff; /* This is in Kelvins now */
+
+ value -= 273150; /* Celcius millidegree */
+ return sprintf(buf, "%i\n", value);
+}
+static DEVICE_ATTR(temp1_input, S_IRUGO, tsc_show_temp1, NULL);
+
+#ifdef CONFIG_APM
+static struct tsc210x_hwmon *apm_hwmon;
+
+static void tsc210x_get_power_status(struct apm_power_info *info)
+{
+ struct tsc210x_hwmon *hwmon = apm_hwmon;
+ apm_lock();
+ hwmon->pdata->apm_report(info, hwmon->bat);
+ apm_unlock();
+}
+#endif
+
+static int tsc210x_hwmon_probe(struct platform_device *pdev)
+{
+ struct tsc210x_hwmon *hwmon;
+ struct tsc210x_config *pdata = pdev->dev.platform_data;
+ int status = 0;
+
+ hwmon = (struct tsc210x_hwmon *)
+ kzalloc(sizeof(struct tsc210x_hwmon), GFP_KERNEL);
+ if (!hwmon) {
+ printk(KERN_ERR "%s: allocation failed\n", __FUNCTION__);
+ return -ENOMEM;
+ }
+
+ hwmon->dev = hwmon_device_register(&pdev->dev);
+ if (IS_ERR(hwmon->dev)) {
+ kfree(hwmon);
+ printk(KERN_ERR "%s: Class registration failed\n",
+ __FUNCTION__);
+ return PTR_ERR(hwmon->dev);
+ }
+
+ hwmon->pdata = pdata;
+
+#ifdef CONFIG_APM
+ spin_lock_init(&hwmon->apm_lock);
+
+ if (pdata->apm_report) {
+ apm_hwmon = hwmon;
+ apm_get_power_status = tsc210x_get_power_status;
+ }
+#endif
+
+ platform_set_drvdata(pdev, hwmon);
+
+ if (pdata->monitor & (TSC_BAT1 | TSC_BAT2 | TSC_AUX1 | TSC_AUX2))
+ status |= tsc210x_ports_cb(pdev->dev.parent,
+ (tsc210x_ports_t) tsc210x_ports, hwmon);
+ if (pdata->monitor & TSC_TEMP) {
+ status |= tsc210x_temp1_cb(pdev->dev.parent,
+ (tsc210x_temp_t) tsc210x_temp1, hwmon);
+ status |= tsc210x_temp2_cb(pdev->dev.parent,
+ (tsc210x_temp_t) tsc210x_temp2, hwmon);
+ }
+
+ if (status) {
+ tsc210x_ports_cb(pdev->dev.parent, 0, 0);
+ tsc210x_temp1_cb(pdev->dev.parent, 0, 0);
+ tsc210x_temp2_cb(pdev->dev.parent, 0, 0);
+ platform_set_drvdata(pdev, 0);
+#ifdef CONFIG_APM
+ if (pdata->apm_report)
+ apm_get_power_status = 0;
+#endif
+ hwmon_device_unregister(hwmon->dev);
+ kfree(hwmon);
+ return status;
+ }
+
+ if (pdata->monitor & TSC_BAT1)
+ status |= device_create_file(&pdev->dev, &dev_attr_in0_input);
+ if (pdata->monitor & TSC_BAT2)
+ status |= device_create_file(&pdev->dev, &dev_attr_in1_input);
+ if (pdata->monitor & TSC_AUX1)
+ status |= device_create_file(&pdev->dev, &dev_attr_in2_input);
+ if (pdata->monitor & TSC_AUX2)
+ status |= device_create_file(&pdev->dev, &dev_attr_in3_input);
+ if (pdata->monitor & TSC_TEMP) {
+ status |= device_create_file(&pdev->dev, &dev_attr_in4_input);
+ status |= device_create_file(&pdev->dev, &dev_attr_in5_input);
+ status |= device_create_file(&pdev->dev, &dev_attr_temp1_input);
+ }
+ if (status) /* Not fatal */
+ printk(KERN_ERR "%s: Creating one or more "
+ "attribute files failed\n", __FUNCTION__);
+
+ return 0;
+}
+
+static int tsc210x_hwmon_remove(struct platform_device *pdev)
+{
+ struct tsc210x_hwmon *dev = platform_get_drvdata(pdev);
+
+ tsc210x_ports_cb(pdev->dev.parent, 0, 0);
+ tsc210x_temp1_cb(pdev->dev.parent, 0, 0);
+ tsc210x_temp2_cb(pdev->dev.parent, 0, 0);
+ platform_set_drvdata(pdev, 0);
+#ifdef CONFIG_APM
+ if (dev->pdata->apm_report)
+ apm_get_power_status = 0;
+#endif
+ hwmon_device_unregister(dev->dev);
+ kfree(dev);
+ return 0;
+}
+
+static struct platform_driver tsc210x_hwmon_driver = {
+ .probe = tsc210x_hwmon_probe,
+ .remove = tsc210x_hwmon_remove,
+ /* Nothing to do on suspend/resume */
+ .driver = {
+ .name = "tsc210x-hwmon",
+ },
+};
+
+static int __init tsc210x_hwmon_init(void)
+{
+ return platform_driver_register(&tsc210x_hwmon_driver);
+}
+
+static void __exit tsc210x_hwmon_exit(void)
+{
+ platform_driver_unregister(&tsc210x_hwmon_driver);
+}
+
+module_init(tsc210x_hwmon_init);
+module_exit(tsc210x_hwmon_exit);
+
+MODULE_AUTHOR("Andrzej Zaborowski");
+MODULE_DESCRIPTION("hwmon driver for TI TSC210x-connected sensors.");
+MODULE_LICENSE("GPL");
--- /dev/null
+/*
+ * drivers/spi/tsc210x.c
+ *
+ * TSC2101/2102 interface driver.
+ *
+ * Copyright (c) 2005-2007 Andrzej Zaborowski <balrog@zabor.org>
+ *
+ * This package 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 package 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 package; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/errno.h>
+#include <linux/platform_device.h>
+#include <linux/suspend.h>
+#include <linux/interrupt.h>
+#include <linux/clk.h>
+#include <linux/err.h>
+#include <linux/spinlock.h>
+#include <linux/workqueue.h>
+#include <linux/completion.h>
+#include <linux/autoconf.h>
+#include <linux/spi/spi.h>
+#include <linux/spi/tsc210x.h>
+
+/* Bit field definitions for chip registers */
+
+/* Scan X, Y, Z1, Z2, chip controlled, 12-bit, 16 samples, 500 usec */
+#define TSC210X_ADC_TS_CONTROL 0x8bf4
+/* Scan BAT1, BAT2, AUX1, AUX2, 12-bit, 16 samples, 500 usec */
+#define TSC210X_ADC_SCAN_CONTROL 0x2ff4
+/* Scan TEMP1, 12-bit, 16 samples, 500 usec */
+#define TSC210X_ADC_T1_CONTROL 0x2bf4
+/* Scan TEMP2, 12-bit, 16 samples, 500 usec */
+#define TSC210X_ADC_T2_CONTROL 0x33f4
+/* PINT/DAV acts as DAV */
+#define TSC210X_ADC_DAV 0x4000
+/* Internal reference, 100 usec delay, 1.25 V reference */
+#define TSC210X_ADC_INT_REF 0x0016
+/* External reference, 100 usec delay, 1.25 V reference */
+#define TSC210X_ADC_EXT_REF 0x0002
+/* 84 usec precharge time, 32 usec sense time */
+#define TSC210X_CONFIG_TIMES 0x0008
+/* The reset sequence */
+#define TSC210X_RESET 0xbb00
+/* Pen Status bit */
+#define TSC210X_ADC_PSTCM (1 << 15)
+/* A/D Status bit */
+#define TSC210X_ADC_ADST (1 << 14)
+/* (At least) One of X, Y, Z1, Z2 contains data */
+#define TSC210X_TS_DAV 0x0780
+/* (At least) One of BAT1, BAT2, AUX1, AUX2 contains data */
+#define TSC210X_PS_DAV 0x0078
+/* TEMP1 contains data */
+#define TSC210X_T1_DAV 0x0004
+/* TEMP2 contains data */
+#define TSC210X_T2_DAV 0x0002
+#define TSC2101_DAC_ON 0x0000
+#define TSC2101_DAC_OFF 0xe7fc
+#define TSC2102_DAC_ON 0x3ba0
+#define TSC2102_DAC_OFF 0xafa0
+#define TSC210X_FS44K (1 << 13)
+#define TSC210X_PLL1_OFF 0x0000
+#define TSC210X_PLL1_44K 0x811c
+#define TSC210X_PLL1_48K 0x8120
+#define TSC210X_PLL2_44K (5462 << 2)
+#define TSC210X_PLL2_48K (1920 << 2)
+#define TSC210X_SLVMS (1 << 11)
+#define TSC210X_DEEMPF (1 << 0)
+#define TSC2102_BASSBC (1 << 1)
+#define TSC210X_KEYCLICK_OFF 0x0000
+
+#define CS_CHANGE(val) 0
+
+struct tsc210x_spi_req {
+ struct spi_device *dev;
+ uint16_t command, data;
+ struct spi_message message;
+};
+
+struct tsc210x_dev {
+ enum tsc_type {
+ tsc2101,
+ tsc2102,
+ } kind;
+ struct tsc210x_config *pdata;
+ struct clk *bclk_ck;
+
+ struct workqueue_struct *queue;
+ struct delayed_work ts_worker; /* Poll-wait for PEN UP */
+ struct delayed_work sensor_worker; /* Scan the ADC inputs */
+ spinlock_t queue_lock;
+ struct completion data_avail;
+ tsc210x_touch_t touch_cb;
+ void *touch_cb_ctx;
+ tsc210x_coords_t coords_cb;
+ void *coords_cb_ctx;
+ tsc210x_ports_t ports_cb;
+ void *ports_cb_ctx;
+ tsc210x_temp_t temp1_cb;
+ void *temp2_cb_ctx;
+ tsc210x_temp_t temp2_cb;
+ void *temp1_cb_ctx;
+
+ struct spi_device *spi;
+ struct spi_transfer *transfers;
+ struct tsc210x_spi_req req_adc;
+ struct tsc210x_spi_req req_status;
+ struct tsc210x_spi_req req_mode;
+ struct tsc210x_spi_req req_stop;
+
+ int pendown;
+ int flushing; /* Queue flush in progress */
+ uint16_t status, adc_data[4];
+ int bat[2], aux[2], temp[2];
+};
+
+static struct {
+ unsigned int ts_msecs; /* Interval for .ts_timer */
+ unsigned int mode_msecs; /* Interval for .mode_timer */
+} settings;
+
+module_param_named(touch_check_msecs, settings.ts_msecs, uint, 0);
+MODULE_PARM_DESC(touch_check_msecs, "Pen-up polling interval in msecs");
+
+module_param_named(sensor_scan_msecs, settings.mode_msecs, uint, 0);
+MODULE_PARM_DESC(sensor_scan_msecs, "Temperature & battery scan interval");
+
+void tsc210x_write_sync(struct tsc210x_dev *dev,
+ int page, u8 address, u16 data)
+{
+ static struct tsc210x_spi_req req;
+ static struct spi_transfer transfer[2];
+ int ret;
+
+ spi_message_init(&req.message);
+
+ /* Address */
+ req.command = (page << 11) | (address << 5);
+ transfer[0].tx_buf = &req.command;
+ transfer[0].rx_buf = 0;
+ transfer[0].len = 2;
+ spi_message_add_tail(&transfer[0], &req.message);
+
+ /* Data */
+ transfer[1].tx_buf = &data;
+ transfer[1].rx_buf = 0;
+ transfer[1].len = 2;
+ transfer[1].cs_change = CS_CHANGE(1);
+ spi_message_add_tail(&transfer[1], &req.message);
+
+ ret = spi_sync(dev->spi, &req.message);
+ if (!ret && req.message.status)
+ ret = req.message.status;
+
+ if (ret)
+ printk(KERN_ERR "%s: error %i in SPI request\n",
+ __FUNCTION__, ret);
+}
+
+void tsc210x_reads_sync(struct tsc210x_dev *dev,
+ int page, u8 startaddress, u16 *data, int numregs)
+{
+ static struct tsc210x_spi_req req;
+ static struct spi_transfer transfer[6];
+ int ret, i, j;
+
+ BUG_ON(numregs + 1 > ARRAY_SIZE(transfer));
+
+ spi_message_init(&req.message);
+ i = 0;
+ j = 0;
+
+ /* Address */
+ req.command = 0x8000 | (page << 11) | (startaddress << 5);
+ transfer[i].tx_buf = &req.command;
+ transfer[i].rx_buf = 0;
+ transfer[i].len = 2;
+ spi_message_add_tail(&transfer[i ++], &req.message);
+
+ /* Data */
+ while (j < numregs) {
+ transfer[i].tx_buf = 0;
+ transfer[i].rx_buf = &data[j ++];
+ transfer[i].len = 2;
+ transfer[i].cs_change = CS_CHANGE(j == numregs);
+ spi_message_add_tail(&transfer[i ++], &req.message);
+ }
+
+ ret = spi_sync(dev->spi, &req.message);
+ if (!ret && req.message.status)
+ ret = req.message.status;
+
+ if (ret)
+ printk(KERN_ERR "%s: error %i in SPI request\n",
+ __FUNCTION__, ret);
+}
+
+uint16_t tsc210x_read_sync(struct tsc210x_dev *dev, int page, uint8_t address)
+{
+ uint16_t ret;
+ tsc210x_reads_sync(dev, page, address, &ret, 1);
+ return ret;
+}
+
+static void tsc210x_submit_async(struct tsc210x_spi_req *spi)
+{
+ int ret;
+
+ ret = spi_async(spi->dev, &spi->message);
+ if (ret)
+ printk(KERN_ERR "%s: error %i in SPI request\n",
+ __FUNCTION__, ret);
+}
+
+static void tsc210x_request_alloc(struct tsc210x_dev *dev,
+ struct tsc210x_spi_req *spi, int direction,
+ int page, u8 startaddress, int numregs, uint16_t *data,
+ void (*complete)(struct tsc210x_dev *context),
+ struct spi_transfer **transfer)
+{
+ spi->dev = dev->spi;
+
+ if (direction == 1) /* Write */
+ numregs = 2;
+ else /* Read */
+ numregs += 1;
+
+ spi_message_init(&spi->message);
+ spi->message.complete = (void (*)(void *)) complete;
+ spi->message.context = dev;
+
+ /* Address */
+ spi->command = (page << 11) | (startaddress << 5);
+ if (direction != 1)
+ spi->command |= 1 << 15;
+
+ (*transfer)->tx_buf = &spi->command;
+ (*transfer)->rx_buf = 0;
+ (*transfer)->len = 2;
+ spi_message_add_tail((*transfer) ++, &spi->message);
+
+ /* Data */
+ while (-- numregs) {
+ if (direction == 1)
+ (*transfer)->tx_buf = &spi->data;
+ else
+ (*transfer)->rx_buf = data ++;
+ (*transfer)->len = 2;
+ (*transfer)->cs_change = CS_CHANGE(numregs != 1);
+ spi_message_add_tail((*transfer) ++, &spi->message);
+ }
+}
+
+#define tsc210x_cb_register_func(cb, cb_t) \
+int tsc210x_ ## cb(struct device *dev, cb_t handler, void *context) \
+{ \
+ struct tsc210x_dev *tsc = (struct tsc210x_dev *) \
+ platform_get_drvdata(to_platform_device(dev)); \
+ \
+ /* Lock the module */ \
+ if (handler && !tsc->cb) \
+ if (!try_module_get(THIS_MODULE)) { \
+ printk(KERN_INFO "Failed to get TSC module\n"); \
+ } \
+ if (!handler && tsc->cb) \
+ module_put(THIS_MODULE); \
+ \
+ tsc->cb = handler; \
+ tsc->cb ## _ctx = context; \
+ return 0; \
+}
+
+tsc210x_cb_register_func(touch_cb, tsc210x_touch_t)
+tsc210x_cb_register_func(coords_cb, tsc210x_coords_t)
+tsc210x_cb_register_func(ports_cb, tsc210x_ports_t)
+tsc210x_cb_register_func(temp1_cb, tsc210x_temp_t)
+tsc210x_cb_register_func(temp2_cb, tsc210x_temp_t)
+
+#ifdef DEBUG
+static void tsc210x_print_dav(void)
+{
+ u16 status = tsc210x_read_sync(dev, TSC210X_TS_STATUS_CTRL);
+ if (status & 0x0fff)
+ printk("TSC210x: data in");
+ if (status & 0x0400)
+ printk(" X");
+ if (status & 0x0200)
+ printk(" Y");
+ if (status & 0x0100)
+ printk(" Z1");
+ if (status & 0x0080)
+ printk(" Z2");
+ if (status & 0x0040)
+ printk(" BAT1");
+ if (status & 0x0020)
+ printk(" BAT2");
+ if (status & 0x0010)
+ printk(" AUX1");
+ if (status & 0x0008)
+ printk(" AUX2");
+ if (status & 0x0004)
+ printk(" TEMP1");
+ if (status & 0x0002)
+ printk(" TEMP2");
+ if (status & 0x0001)
+ printk(" KP");
+ if (status & 0x0fff)
+ printk(".\n");
+}
+#endif
+
+static void tsc210x_complete_dummy(struct tsc210x_dev *dev)
+{
+}
+
+static inline void tsc210x_touchscreen_mode(struct tsc210x_dev *dev)
+{
+ /* Scan X, Y, Z1, Z2, chip controlled, 12-bit, 16 samples, 500 usec */
+ dev->req_mode.data = TSC210X_ADC_TS_CONTROL;
+ tsc210x_submit_async(&dev->req_mode);
+}
+
+static inline void tsc210x_portscan_mode(struct tsc210x_dev *dev)
+{
+ /* Scan BAT1, BAT2, AUX1, AUX2, 12-bit, 16 samples, 500 usec */
+ dev->req_mode.data = TSC210X_ADC_SCAN_CONTROL;
+ tsc210x_submit_async(&dev->req_mode);
+}
+
+static inline void tsc210x_temp1_mode(struct tsc210x_dev *dev)
+{
+ /* Scan TEMP1, 12-bit, 16 samples, 500 usec */
+ dev->req_mode.data = TSC210X_ADC_T1_CONTROL;
+ tsc210x_submit_async(&dev->req_mode);
+}
+
+static inline void tsc210x_temp2_mode(struct tsc210x_dev *dev)
+{
+ /* Scan TEMP2, 12-bit, 16 samples, 500 usec */
+ dev->req_mode.data = TSC210X_ADC_T2_CONTROL;
+ tsc210x_submit_async(&dev->req_mode);
+}
+
+/* Abort current conversion if any */
+static void tsc210x_new_mode(struct tsc210x_dev *dev)
+{
+ dev->req_stop.data = TSC210X_ADC_ADST;
+ tsc210x_submit_async(&dev->req_stop);
+}
+
+static void tsc210x_queue_scan(struct tsc210x_dev *dev)
+{
+ if (dev->pdata->monitor)
+ if (!queue_delayed_work(dev->queue,
+ &dev->sensor_worker,
+ msecs_to_jiffies(settings.mode_msecs)))
+ printk(KERN_ERR "%s: can't queue measurements\n",
+ __FUNCTION__);
+}
+
+static void tsc210x_queue_penup(struct tsc210x_dev *dev)
+{
+ if (!queue_delayed_work(dev->queue,
+ &dev->ts_worker,
+ msecs_to_jiffies(settings.ts_msecs)))
+ printk(KERN_ERR "%s: can't queue pen-up poll\n",
+ __FUNCTION__);
+}
+
+static void tsc210x_status_report(struct tsc210x_dev *dev)
+{
+ /*
+ * Read all converted data from corresponding registers
+ * so that the ADC can move on to a new conversion.
+ */
+ if (dev->status & TSC210X_TS_DAV) {
+ if (!dev->pendown && !dev->flushing) {
+ dev->pendown = 1;
+ if (dev->touch_cb)
+ dev->touch_cb(dev->touch_cb_ctx, 1);
+
+ tsc210x_queue_penup(dev);
+ }
+
+ tsc210x_submit_async(&dev->req_adc);
+ }
+
+ if (dev->status & (TSC210X_PS_DAV | TSC210X_T1_DAV |TSC210X_T2_DAV))
+ complete(&dev->data_avail);
+}
+
+static void tsc210x_data_report(struct tsc210x_dev *dev)
+{
+ uint16_t adc_data[4];
+
+ if (dev->status & TSC210X_PS_DAV) {
+ tsc210x_reads_sync(dev, TSC210X_TS_BAT1, adc_data, 4);
+
+ dev->bat[0] = adc_data[0];
+ dev->bat[1] = adc_data[1];
+ dev->aux[0] = adc_data[2];
+ dev->aux[1] = adc_data[3];
+ if (dev->ports_cb)
+ dev->ports_cb(dev->ports_cb_ctx, dev->bat, dev->aux);
+ }
+
+ if (dev->status & TSC210X_T1_DAV) {
+ dev->temp[0] = tsc210x_read_sync(dev, TSC210X_TS_TEMP1);
+
+ if (dev->temp1_cb)
+ dev->temp1_cb(dev->temp1_cb_ctx, dev->temp[0]);
+ }
+
+ if (dev->status & TSC210X_T2_DAV) {
+ dev->temp[1] = tsc210x_read_sync(dev, TSC210X_TS_TEMP2);
+
+ if (dev->temp2_cb)
+ dev->temp2_cb(dev->temp2_cb_ctx, dev->temp[1]);
+ }
+}
+
+static void tsc210x_coords_report(struct tsc210x_dev *dev)
+{
+ if (dev->coords_cb)
+ dev->coords_cb(dev->coords_cb_ctx,
+ dev->adc_data[0], dev->adc_data[1],
+ dev->adc_data[2], dev->adc_data[3]);
+}
+
+/*
+ * There are at least three ways to check for pen-up:
+ * - the PINT/DAV pin state,
+ * - reading PSTCM bit in ADC Control register (D15, offset 0x00),
+ * - reading ADST bit in ADC Control register (D14, offset 0x00),
+ * ADC idle would indicate no screen touch.
+ * Unfortunately none of them seems to be 100% accurate and you will
+ * find they are totally inconsistent, i.e. you get to see any arbitrary
+ * combination of values in these three bits. So we will busy-wait
+ * for a moment when the latter two indicate a pen-up, using a queue,
+ * before we report a pen-up.
+ */
+static void tsc210x_pressure(struct work_struct *work)
+{
+ struct tsc210x_dev *dev =
+ container_of(work, struct tsc210x_dev, ts_worker.work);
+ uint16_t adc_status;
+
+ BUG_ON(!dev->pendown);
+
+ adc_status = tsc210x_read_sync(dev, TSC210X_TS_ADC_CTRL);
+
+ if ((adc_status & TSC210X_ADC_PSTCM) ||
+ !(adc_status & TSC210X_ADC_ADST)) {
+ tsc210x_queue_penup(dev);
+ } else {
+ dev->pendown = 0;
+ if (dev->touch_cb)
+ dev->touch_cb(dev->touch_cb_ctx, 0);
+ }
+}
+
+static void tsc210x_wait_data(struct tsc210x_dev *dev)
+{
+ wait_for_completion(&dev->data_avail);
+
+ tsc210x_data_report(dev);
+}
+
+static void tsc210x_input_scan(struct work_struct *work)
+{
+ struct tsc210x_dev *dev = (struct tsc210x_dev *)
+ container_of(work, struct tsc210x_dev, sensor_worker.work);
+
+ tsc210x_new_mode(dev);
+
+ if (dev->pdata->monitor &
+ (TSC_BAT1 | TSC_BAT2 | TSC_AUX1 | TSC_AUX2)) {
+ tsc210x_portscan_mode(dev);
+ tsc210x_wait_data(dev);
+ }
+
+ if (dev->pdata->monitor & TSC_TEMP) {
+ tsc210x_temp1_mode(dev);
+ tsc210x_wait_data(dev);
+
+ tsc210x_temp2_mode(dev);
+ tsc210x_wait_data(dev);
+ }
+
+ tsc210x_touchscreen_mode(dev);
+
+ spin_lock(&dev->queue_lock);
+ if (!dev->flushing)
+ tsc210x_queue_scan(dev);
+ spin_unlock(&dev->queue_lock);
+}
+
+/* ADC has finished a new conversion for us. */
+static irqreturn_t tsc210x_handler(int irq, void *dev_id)
+{
+ struct tsc210x_dev *dev = (struct tsc210x_dev *) dev_id;
+
+ /* See what data became available. */
+ tsc210x_submit_async(&dev->req_status);
+
+ return IRQ_HANDLED;
+}
+
+#ifdef CONFIG_SOUND
+/*
+ * Volume level values should be in the range [0, 127].
+ * Higher values mean lower volume.
+ */
+void tsc210x_set_dac_volume(struct device *dev,
+ uint8_t left_ch, uint8_t right_ch)
+{
+ struct tsc210x_dev *tsc = (struct tsc210x_dev *)
+ platform_get_drvdata(to_platform_device(dev));
+ u16 val;
+ if (tsc->kind == tsc2102) {
+ /* All 0's or all 1's */
+ if (left_ch == 0x00 || left_ch == 0x7f)
+ left_ch ^= 0x7f;
+ if (right_ch == 0x00 || right_ch == 0x7f)
+ right_ch ^= 0x7f;
+ }
+
+ val = tsc210x_read_sync(tsc, TSC210X_DAC_GAIN_CTRL);
+
+ val &= 0x8080; /* Preserve mute-bits */
+ val |= (left_ch << 8) | right_ch;
+
+ tsc210x_write_sync(tsc, TSC210X_DAC_GAIN_CTRL, val);
+}
+
+void tsc210x_set_dac_mute(struct device *dev, int left_ch, int right_ch)
+{
+ struct tsc210x_dev *tsc = (struct tsc210x_dev *)
+ platform_get_drvdata(to_platform_device(dev));
+ u16 val;
+
+ val = tsc210x_read_sync(tsc, TSC210X_DAC_GAIN_CTRL);
+
+ val &= 0x7f7f; /* Preserve volume settings */
+ val |= (left_ch << 15) | (right_ch << 7);
+
+ tsc210x_write_sync(tsc, TSC210X_DAC_GAIN_CTRL, val);
+}
+
+void tsc210x_get_dac_mute(struct device *dev, int *left_ch, int *right_ch)
+{
+ struct tsc210x_dev *tsc = (struct tsc210x_dev *)
+ platform_get_drvdata(to_platform_device(dev));
+ u16 val;
+
+ val = tsc210x_read_sync(tsc, TSC210X_DAC_GAIN_CTRL);
+
+ *left_ch = !!(val & (1 << 15));
+ *right_ch = !!(val & (1 << 7));
+}
+
+void tsc210x_set_deemphasis(struct device *dev, int enable)
+{
+ struct tsc210x_dev *tsc = (struct tsc210x_dev *)
+ platform_get_drvdata(to_platform_device(dev));
+ u16 val;
+ val = tsc210x_read_sync(tsc, TSC210X_POWER_CTRL);
+
+ if (enable)
+ val &= ~TSC210X_DEEMPF;
+ else
+ val |= TSC210X_DEEMPF;
+
+ tsc210x_write_sync(tsc, TSC210X_POWER_CTRL, val);
+}
+
+void tsc2102_set_bassboost(struct device *dev, int enable)
+{
+ struct tsc210x_dev *tsc = (struct tsc210x_dev *)
+ platform_get_drvdata(to_platform_device(dev));
+ u16 val;
+ val = tsc210x_read_sync(tsc, TSC210X_POWER_CTRL);
+
+ if (enable)
+ val &= ~TSC2102_BASSBC;
+ else
+ val |= TSC2102_BASSBC;
+
+ tsc210x_write_sync(tsc, TSC210X_POWER_CTRL, val);
+}
+
+/* {rate, dsor, fsref} */
+static const struct tsc210x_rate_info_s tsc2101_rates[] = {
+ /* Fsref / 6.0 */
+ {7350, 7, 1},
+ {8000, 7, 0},
+ /* Fsref / 5.5 */
+ {8018, 6, 1},
+ {8727, 6, 0},
+ /* Fsref / 5.0 */
+ {8820, 5, 1},
+ {9600, 5, 0},
+ /* Fsref / 4.0 */
+ {11025, 4, 1},
+ {12000, 4, 0},
+ /* Fsref / 3.0 */
+ {14700, 3, 1},
+ {16000, 3, 0},
+ /* Fsref / 2.0 */
+ {22050, 2, 1},
+ {24000, 2, 0},
+ /* Fsref / 1.5 */
+ {29400, 1, 1},
+ {32000, 1, 0},
+ /* Fsref */
+ {44100, 0, 1},
+ {48000, 0, 0},
+
+ {0, 0, 0},
+};
+
+/* {rate, dsor, fsref} */
+static const struct tsc210x_rate_info_s tsc2102_rates[] = {
+ /* Fsref / 6.0 */
+ {7350, 63, 1},
+ {8000, 63, 0},
+ /* Fsref / 6.0 */
+ {7350, 54, 1},
+ {8000, 54, 0},
+ /* Fsref / 5.0 */
+ {8820, 45, 1},
+ {9600, 45, 0},
+ /* Fsref / 4.0 */
+ {11025, 36, 1},
+ {12000, 36, 0},
+ /* Fsref / 3.0 */
+ {14700, 27, 1},
+ {16000, 27, 0},
+ /* Fsref / 2.0 */
+ {22050, 18, 1},
+ {24000, 18, 0},
+ /* Fsref / 1.5 */
+ {29400, 9, 1},
+ {32000, 9, 0},
+ /* Fsref */
+ {44100, 0, 1},
+ {48000, 0, 0},
+
+ {0, 0, 0},
+};
+
+int tsc210x_set_rate(struct device *dev, int rate)
+{
+ struct tsc210x_dev *tsc = (struct tsc210x_dev *)
+ platform_get_drvdata(to_platform_device(dev));
+ int i;
+ uint16_t val;
+ const struct tsc210x_rate_info_s *rates;
+
+ if (tsc->kind == tsc2101)
+ rates = tsc2101_rates;
+ else
+ rates = tsc2102_rates;
+
+ for (i = 0; rates[i].sample_rate; i ++)
+ if (rates[i].sample_rate == rate)
+ break;
+ if (rates[i].sample_rate == 0) {
+ printk(KERN_ERR "Unknown sampling rate %i.0 Hz\n", rate);
+ return -EINVAL;
+ }
+
+ if (tsc->kind == tsc2101) {
+ val = tsc210x_read_sync(tsc, TSC210X_AUDIO1_CTRL) &
+ ~((7 << 3) | (7 << 0));
+ val |= rates[i].divisor << 3;
+ val |= rates[i].divisor << 0;
+ } else
+ val = rates[i].divisor;
+
+ tsc210x_write_sync(tsc, TSC210X_AUDIO1_CTRL, val);
+
+ val = tsc210x_read_sync(tsc, TSC210X_AUDIO3_CTRL);
+
+ if (tsc2102_rates[i].fs_44k) {
+ tsc210x_write_sync(tsc,
+ TSC210X_AUDIO3_CTRL, val | TSC210X_FS44K);
+ /* Enable Phase-locked-loop, set up clock dividers */
+ tsc210x_write_sync(tsc, TSC210X_PLL1_CTRL, TSC210X_PLL1_44K);
+ tsc210x_write_sync(tsc, TSC210X_PLL2_CTRL, TSC210X_PLL2_44K);
+ } else {
+ tsc210x_write_sync(tsc,
+ TSC210X_AUDIO3_CTRL, val & ~TSC210X_FS44K);
+ /* Enable Phase-locked-loop, set up clock dividers */
+ tsc210x_write_sync(tsc, TSC210X_PLL1_CTRL, TSC210X_PLL1_48K);
+ tsc210x_write_sync(tsc, TSC210X_PLL2_CTRL, TSC210X_PLL2_48K);
+ }
+
+ return 0;
+}
+
+/*
+ * Perform basic set-up with default values and power the DAC/ADC on.
+ */
+void tsc210x_dac_power(struct device *dev, int on)
+{
+ struct tsc210x_dev *tsc = (struct tsc210x_dev *)
+ platform_get_drvdata(to_platform_device(dev));
+
+ if (on) {
+ /* 16-bit words, DSP mode, sample at Fsref */
+ tsc210x_write_sync(tsc,
+ TSC210X_AUDIO1_CTRL, 0x0100);
+ /* Keyclicks off, soft-stepping at normal rate */
+ tsc210x_write_sync(tsc,
+ TSC210X_AUDIO2_CTRL, TSC210X_KEYCLICK_OFF);
+ /* 44.1 kHz Fsref, continuous transfer mode, master DAC */
+ tsc210x_write_sync(tsc,
+ TSC210X_AUDIO3_CTRL, 0x2000);
+ /* Soft-stepping enabled, 1 dB MIX AGC hysteresis */
+ tsc210x_write_sync(tsc,
+ TSC210X_AUDIO4_CTRL, 0x0000);
+
+ /* PLL generates 44.1 kHz */
+ tsc210x_write_sync(tsc,
+ TSC210X_PLL1_CTRL, TSC210X_PLL1_44K);
+ tsc210x_write_sync(tsc,
+ TSC210X_PLL2_CTRL, TSC210X_PLL2_44K);
+
+ /* Codec & DAC power up, virtual ground disabled */
+ tsc210x_write_sync(tsc,
+ TSC210X_POWER_CTRL, (tsc->kind == tsc2101) ?
+ TSC2101_DAC_ON : TSC2102_DAC_ON);
+ } else {
+ /* All off */
+ tsc210x_write_sync(tsc,
+ TSC210X_AUDIO2_CTRL, TSC210X_KEYCLICK_OFF);
+ tsc210x_write_sync(tsc,
+ TSC210X_PLL1_CTRL, TSC210X_PLL1_OFF);
+#if 0
+ tsc210x_write_sync(tsc,
+ TSC210X_POWER_CTRL, (tsc->kind == tsc2101) ?
+ TSC2102_DAC_OFF : TSC2102_DAC_OFF);
+#endif
+ }
+}
+
+void tsc210x_set_i2s_master(struct device *dev, int state)
+{
+ struct tsc210x_dev *tsc = (struct tsc210x_dev *)
+ platform_get_drvdata(to_platform_device(dev));
+ uint16_t val;
+
+ val = tsc210x_read_sync(tsc, TSC210X_AUDIO3_CTRL);
+
+ if (state)
+ tsc210x_write_sync(tsc, TSC210X_AUDIO3_CTRL,
+ val | TSC210X_SLVMS);
+ else
+ tsc210x_write_sync(tsc, TSC210X_AUDIO3_CTRL,
+ val & ~TSC210X_SLVMS);
+}
+#endif /* CONFIG_SOUND */
+
+static int tsc210x_configure(struct tsc210x_dev *dev)
+{
+ /* Reset the chip */
+ tsc210x_write_sync(dev, TSC210X_TS_RESET_CTRL, TSC210X_RESET);
+
+ /* Reference mode */
+ if (dev->pdata->use_internal)
+ tsc210x_write_sync(dev,
+ TSC210X_TS_REF_CTRL, TSC210X_ADC_INT_REF);
+ else
+ tsc210x_write_sync(dev,
+ TSC210X_TS_REF_CTRL, TSC210X_ADC_EXT_REF);
+
+ /* Precharge and sense delays, pen touch detection on */
+ tsc210x_write_sync(dev, TSC210X_TS_CONFIG_CTRL, TSC210X_CONFIG_TIMES);
+
+ /* PINT/DAV acts as DAV */
+ tsc210x_write_sync(dev, TSC210X_TS_STATUS_CTRL, TSC210X_ADC_DAV);
+
+ tsc210x_queue_scan(dev);
+ return 0;
+}
+
+/*
+ * Retrieves chip revision. Should be always 1.
+ */
+int tsc210x_get_revision(struct tsc210x_dev *dev)
+{
+ return tsc210x_read_sync(dev, TSC210X_AUDIO3_CTRL) & 7;
+}
+
+void tsc210x_keyclick(struct tsc210x_dev *dev,
+ int amplitude, int freq, int length)
+{
+ u16 val;
+ val = tsc210x_read_sync(dev, TSC210X_AUDIO2_CTRL);
+ val &= 0x800f;
+
+ /* Set amplitude */
+ switch (amplitude) {
+ case 1:
+ val |= 4 << 12;
+ break;
+ case 2:
+ val |= 7 << 12;
+ break;
+ default:
+ break;
+ }
+
+ /* Frequency */
+ val |= (freq & 0x7) << 8;
+
+ /* Round to nearest supported length */
+ if (dev->kind == tsc2101)
+ val = (min(length - 1, 31) >> 1) << 4;
+ else {
+ if (length > 20)
+ val |= 4 << 4;
+ else if (length > 6)
+ val |= 3 << 4;
+ else if (length > 4)
+ val |= 2 << 4;
+ else if (length > 2)
+ val |= 1 << 4;
+ }
+
+ /* Enable keyclick */
+ val |= 0x8000;
+
+ tsc210x_write_sync(dev, TSC210X_AUDIO2_CTRL, val);
+}
+
+#ifdef CONFIG_PM
+/*
+ * Suspend the chip.
+ */
+static int
+tsc210x_suspend(struct spi_device *spi, pm_message_t state)
+{
+ struct tsc210x_dev *dev = dev_get_drvdata(&spi->dev);
+
+ if (!dev)
+ return -ENODEV;
+
+ /* Stop the inputs scan loop */
+ spin_lock(&dev->queue_lock);
+ dev->flushing = 1;
+ cancel_delayed_work(&dev->sensor_worker);
+ spin_unlock(&dev->queue_lock);
+ flush_workqueue(dev->queue);
+
+ /* Wait until pen-up happens */
+ while (dev->pendown)
+ flush_workqueue(dev->queue);
+
+ /* Abort current conversion and power down the ADC */
+ tsc210x_write_sync(dev, TSC210X_TS_ADC_CTRL, TSC210X_ADC_ADST);
+
+ dev->spi->dev.power.power_state = state;
+
+ return 0;
+}
+
+/*
+ * Resume chip operation.
+ */
+static int tsc210x_resume(struct spi_device *spi)
+{
+ struct tsc210x_dev *dev = dev_get_drvdata(&spi->dev);
+ int err;
+
+ if (!dev)
+ return 0;
+
+ dev->spi->dev.power.power_state = PMSG_ON;
+
+ spin_lock(&dev->queue_lock);
+ err = tsc210x_configure(dev);
+
+ dev->flushing = 0;
+ spin_unlock(&dev->queue_lock);
+
+ return err;
+}
+#else
+#define tsc210x_suspend NULL
+#define tsc210x_resume NULL
+#endif
+
+static struct platform_device tsc210x_ts_device = {
+ .name = "tsc210x-ts",
+ .id = -1,
+};
+
+static struct platform_device tsc210x_hwmon_device = {
+ .name = "tsc210x-hwmon",
+ .id = -1,
+};
+
+static struct platform_device tsc210x_alsa_device = {
+ .name = "tsc210x-alsa",
+ .id = -1,
+};
+
+static int tsc210x_probe(struct spi_device *spi, enum tsc_type type)
+{
+ struct tsc210x_config *pdata = spi->dev.platform_data;
+ struct spi_transfer *spi_buffer;
+ struct tsc210x_dev *dev;
+ int err = 0;
+
+ if (!pdata) {
+ printk(KERN_ERR "TSC210x: Platform data not supplied\n");
+ return -ENOENT;
+ }
+
+ if (!spi->irq) {
+ printk(KERN_ERR "TSC210x: Invalid irq value\n");
+ return -EINVAL;
+ }
+
+ dev = (struct tsc210x_dev *)
+ kzalloc(sizeof(struct tsc210x_dev), GFP_KERNEL);
+ if (!dev) {
+ printk(KERN_ERR "TSC210x: No memory\n");
+ return -ENOMEM;
+ }
+
+ dev->pdata = pdata;
+ dev->pendown = 0;
+ dev->spi = spi;
+ dev->kind = type;
+ dev->queue = create_singlethread_workqueue(spi->dev.driver->name);
+ if (!dev->queue) {
+ printk(KERN_ERR "TSC210x: Can't make a workqueue\n");
+ err = -ENOMEM;
+ goto err_queue;
+ }
+
+ spin_lock_init(&dev->queue_lock);
+ init_completion(&dev->data_avail);
+
+ /* Allocate enough struct spi_transfer's for all requests */
+ spi_buffer = kzalloc(sizeof(struct spi_transfer) * 16, GFP_KERNEL);
+ if (!spi_buffer) {
+ printk(KERN_ERR "TSC210x: No memory for SPI buffers\n");
+ err = -ENOMEM;
+ goto err_buffers;
+ }
+
+ dev->transfers = spi_buffer;
+ tsc210x_request_alloc(dev, &dev->req_adc, 0,
+ TSC210X_TS_X, 4, dev->adc_data,
+ tsc210x_coords_report, &spi_buffer);
+ tsc210x_request_alloc(dev, &dev->req_status, 0,
+ TSC210X_TS_STATUS_CTRL, 1, &dev->status,
+ tsc210x_status_report, &spi_buffer);
+ tsc210x_request_alloc(dev, &dev->req_mode, 1,
+ TSC210X_TS_ADC_CTRL, 1, 0,
+ tsc210x_complete_dummy, &spi_buffer);
+ tsc210x_request_alloc(dev, &dev->req_stop, 1,
+ TSC210X_TS_ADC_CTRL, 1, 0,
+ tsc210x_complete_dummy, &spi_buffer);
+
+ if (pdata->bclk) {
+ /* Get the BCLK */
+ dev->bclk_ck = clk_get(&spi->dev, pdata->bclk);
+ if (IS_ERR(dev->bclk_ck)) {
+ err = PTR_ERR(dev->bclk_ck);
+ printk(KERN_ERR "Unable to get '%s': %i\n",
+ pdata->bclk, err);
+ goto err_clk;
+ }
+
+ clk_enable(dev->bclk_ck);
+ }
+
+ INIT_DELAYED_WORK(&dev->ts_worker, tsc210x_pressure);
+ INIT_DELAYED_WORK(&dev->sensor_worker, tsc210x_input_scan);
+
+ /* Setup the communication bus */
+ dev_set_drvdata(&spi->dev, dev);
+ spi->dev.power.power_state = PMSG_ON;
+ spi->mode = SPI_MODE_1;
+ spi->bits_per_word = 16;
+ err = spi_setup(spi);
+ if (err)
+ goto err_spi;
+
+ /* Now try to detect the chip, make first contact */
+ if (tsc210x_get_revision(dev) != 0x1) {
+ printk(KERN_ERR "No TI %s chip found!\n",
+ spi->dev.driver->name);
+ err = -ENODEV;
+ goto err_spi;
+ }
+
+ err = tsc210x_configure(dev);
+ if (err)
+ goto err_spi;
+
+ /* We want no interrupts before configuration succeeds. */
+ spin_lock(&dev->queue_lock);
+ dev->flushing = 1;
+
+ if (request_irq(spi->irq, tsc210x_handler, IRQF_SAMPLE_RANDOM |
+ IRQF_TRIGGER_FALLING, spi->dev.driver->name,
+ dev)) {
+ printk(KERN_ERR "Could not allocate touchscreen IRQ!\n");
+ err = -EINVAL;
+ goto err_irq;
+ }
+
+ /* Register subdevices controlled by the TSC 2101/2102 */
+ tsc210x_ts_device.dev.platform_data = dev;
+ tsc210x_ts_device.dev.parent = &spi->dev;
+ err = platform_device_register(&tsc210x_ts_device);
+ if (err)
+ goto err_irq;
+
+ tsc210x_hwmon_device.dev.platform_data = pdata;
+ tsc210x_hwmon_device.dev.parent = &spi->dev;
+ err = platform_device_register(&tsc210x_hwmon_device);
+ if (err)
+ goto err_hwmon;
+
+ tsc210x_alsa_device.dev.platform_data = pdata->alsa_config;
+ tsc210x_alsa_device.dev.parent = &spi->dev;
+ err = platform_device_register(&tsc210x_alsa_device);
+ if (err)
+ goto err_alsa;
+
+ dev->flushing = 0;
+ spin_unlock(&dev->queue_lock);
+ return 0;
+
+err_alsa:
+ platform_device_unregister(&tsc210x_hwmon_device);
+err_hwmon:
+ platform_device_unregister(&tsc210x_ts_device);
+err_irq:
+ spin_unlock(&dev->queue_lock);
+err_spi:
+ dev_set_drvdata(&spi->dev, NULL);
+ clk_disable(dev->bclk_ck);
+ clk_put(dev->bclk_ck);
+err_clk:
+ kfree(dev->transfers);
+err_buffers:
+ destroy_workqueue(dev->queue);
+err_queue:
+ kfree(dev);
+ return err;
+}
+
+static int tsc2101_probe(struct spi_device *spi)
+{
+ return tsc210x_probe(spi, tsc2101);
+}
+
+static int tsc2102_probe(struct spi_device *spi)
+{
+ return tsc210x_probe(spi, tsc2102);
+}
+
+static int tsc210x_remove(struct spi_device *spi)
+{
+ struct tsc210x_dev *dev = dev_get_drvdata(&spi->dev);
+
+ /* Stop the inputs scan loop */
+ spin_lock(&dev->queue_lock);
+ dev->flushing = 1;
+ cancel_delayed_work(&dev->sensor_worker);
+ spin_unlock(&dev->queue_lock);
+ flush_workqueue(dev->queue);
+
+ /* Wait for pen-up */
+ while (dev->pendown)
+ flush_workqueue(dev->queue);
+
+ /* Abort current conversion and power down the ADC */
+ tsc210x_write_sync(dev, TSC210X_TS_ADC_CTRL, TSC210X_ADC_ADST);
+
+ destroy_workqueue(dev->queue);
+
+ platform_device_unregister(&tsc210x_ts_device);
+ platform_device_unregister(&tsc210x_hwmon_device);
+ platform_device_unregister(&tsc210x_alsa_device);
+
+ dev_set_drvdata(&spi->dev, NULL);
+
+ /* Release the BCLK */
+ clk_disable(dev->bclk_ck);
+ clk_put(dev->bclk_ck);
+
+ kfree(dev->transfers);
+ kfree(dev);
+
+ return 0;
+}
+
+static struct spi_driver tsc2101_driver = {
+ .probe = tsc2101_probe,
+ .remove = tsc210x_remove,
+ .suspend = tsc210x_suspend,
+ .resume = tsc210x_resume,
+ .driver = {
+ .name = "tsc2101",
+ .owner = THIS_MODULE,
+ .bus = &spi_bus_type,
+ },
+};
+
+static struct spi_driver tsc2102_driver = {
+ .probe = tsc2102_probe,
+ .remove = tsc210x_remove,
+ .suspend = tsc210x_suspend,
+ .resume = tsc210x_resume,
+ .driver = {
+ .name = "tsc2102",
+ .owner = THIS_MODULE,
+ .bus = &spi_bus_type,
+ },
+};
+
+static char __initdata banner[] = KERN_INFO "TI TSC210x driver initializing\n";
+
+static int __init tsc210x_init(void)
+{
+ int err;
+ printk(banner);
+
+ settings.ts_msecs = 20;
+ settings.mode_msecs = 1000;
+
+ err = spi_register_driver(&tsc2101_driver);
+ if (err != 0)
+ return err;
+
+ err = spi_register_driver(&tsc2102_driver);
+ if (err != 0)
+ spi_unregister_driver(&tsc2101_driver);
+
+ return err;
+}
+
+static void __exit tsc210x_exit(void)
+{
+ spi_unregister_driver(&tsc2101_driver);
+ spi_unregister_driver(&tsc2102_driver);
+}
+
+module_init(tsc210x_init);
+module_exit(tsc210x_exit);
+
+EXPORT_SYMBOL(tsc210x_read_sync);
+EXPORT_SYMBOL(tsc210x_reads_sync);
+EXPORT_SYMBOL(tsc210x_write_sync);
+EXPORT_SYMBOL(tsc210x_keyclick);
+
+MODULE_AUTHOR("Andrzej Zaborowski");
+MODULE_DESCRIPTION("Interface driver for TI TSC210x chips.");
+MODULE_LICENSE("GPL");
--- /dev/null
+/*
+ * include/linux/spi/tsc2102.h
+ *
+ * TI TSC2101/2102 control register definitions.
+ *
+ * Copyright (c) 2005-2007 Andrzej Zaborowski <balrog@zabor.org>
+ *
+ * This package 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 package 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 package; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#ifndef __LINUX_SPI_TSC210X_H
+#define __LINUX_SPI_TSC210X_H
+
+struct apm_power_info;
+struct tsc210x_config {
+ int use_internal; /* Use internal reference voltage */
+ uint32_t monitor; /* What inputs are relevant */
+ int temp_at25c[2]; /* Thermometer calibration data */
+ void (*apm_report)(struct apm_power_info *info, int battery[]);
+ /* Report status to APM based on battery[] */
+ void *alsa_config; /* .platform_data for the ALSA device */
+ const char *mclk; /* Optional: bclk name */
+ const char *bclk; /* Optional: mclk name */
+};
+
+#define TSC_BAT1 (1 << 0)
+#define TSC_BAT2 (1 << 1)
+#define TSC_AUX1 (1 << 2)
+#define TSC_AUX2 (1 << 3)
+#define TSC_TEMP (1 << 4)
+
+#define TSC_AUX TSC_AUX1
+#define TSC_VBAT TSC_BAT1
+
+struct tsc210x_dev;
+extern u16 tsc210x_read_sync(struct tsc210x_dev *dev, int page, u8 address);
+extern void tsc210x_reads_sync(struct tsc210x_dev *dev, int page,
+ u8 startaddress, u16 *data, int numregs);
+extern void tsc210x_write_sync(struct tsc210x_dev *dev, int page,
+ u8 address, u16 data);
+
+typedef void (*tsc210x_touch_t)(void *context, int touching);
+typedef void (*tsc210x_coords_t)(void *context, int x, int y, int z1, int z2);
+typedef void (*tsc210x_ports_t)(void *context, int bat[], int aux[]);
+typedef void (*tsc210x_temp_t)(void *context, int temp);
+extern int tsc210x_touch_cb(struct device *dev,
+ tsc210x_touch_t handler, void *context);
+extern int tsc210x_coords_cb(struct device *dev,
+ tsc210x_coords_t handler, void *context);
+extern int tsc210x_ports_cb(struct device *dev,
+ tsc210x_ports_t handler, void *context);
+extern int tsc210x_temp1_cb(struct device *dev,
+ tsc210x_temp_t handler, void *context);
+extern int tsc210x_temp2_cb(struct device *dev,
+ tsc210x_temp_t handler, void *context);
+
+#ifdef CONFIG_SOUND
+extern void tsc210x_set_dac_volume(struct device *dev,
+ uint8_t left_ch, uint8_t right_ch);
+extern void tsc210x_set_dac_mute(struct device *dev,
+ int left_ch, int right_ch);
+extern void tsc210x_get_dac_mute(struct device *dev,
+ int *left_ch, int *right_ch);
+extern void tsc210x_dac_power(struct device *dev, int on);
+extern int tsc210x_set_rate(struct device *dev, int rate);
+extern void tsc210x_set_i2s_master(struct device *dev, int state);
+extern void tsc210x_set_deemphasis(struct device *dev, int enable);
+extern void tsc2102_set_bassboost(struct device *dev, int enable);
+#endif
+
+/*
+ * Emit a short keyclick typically in order to give feedback to
+ * user on specific events.
+ *
+ * amplitude must be between 0 (lowest) and 2 (highest).
+ * freq must be between 0 (corresponds to 62.5 Hz) and 7 (8 kHz).
+ * length should be between 2 and 32 periods.
+ *
+ * This function sleeps but for a period unrelated to the length of
+ * the sound, i.e. returning doesn't indicate that the sound has
+ * finished.
+ */
+extern void tsc210x_keyclick(struct tsc210x_dev *dev,
+ int amplitude, int freq, int length);
+
+/* Page 0, Touch Screen & Keypad Data registers */
+#define TSC210X_TS_X 0, 0x00
+#define TSC210X_TS_Y 0, 0x01
+#define TSC210X_TS_Z1 0, 0x02
+#define TSC210X_TS_Z2 0, 0x03
+#define TSC210X_TS_BAT1 0, 0x05
+#define TSC2102_TS_BAT2 0, 0x06
+#define TSC210X_TS_AUX1 0, 0x07
+#define TSC2101_TS_AUX2 0, 0x08
+#define TSC210X_TS_TEMP1 0, 0x09
+#define TSC210X_TS_TEMP2 0, 0x0a
+
+/* Page 1, Touch Screen & Keypad Control registers */
+#define TSC210X_TS_ADC_CTRL 1, 0x00
+#define TSC210X_TS_STATUS_CTRL 1, 0x01
+#define TSC2101_TS_BUFFER_CTRL 1, 0x02
+#define TSC210X_TS_REF_CTRL 1, 0x03
+#define TSC210X_TS_RESET_CTRL 1, 0x04
+#define TSC210X_TS_CONFIG_CTRL 1, 0x05
+#define TSC2101_TS_TEMPMAX_CTRL 1, 0x06
+#define TSC2101_TS_TEMPMIN_CTRL 1, 0x07
+#define TSC2101_TS_AUX1MAX_CTRL 1, 0x08
+#define TSC2101_TS_AUX1MIN_CTRL 1, 0x09
+#define TSC2101_TS_AUX2MAX_CTRL 1, 0x0a
+#define TSC2101_TS_AUX2MIN_CTRL 1, 0x0b
+#define TSC2101_TS_MCONFIG_CTRL 1, 0x0c
+#define TSC2101_TS_DELAY_CTRL 1, 0x0d
+
+/* Page 2, Audio Control registers */
+#define TSC210X_AUDIO1_CTRL 2, 0x00
+#define TSC2101_HEADSET_GAIN_CTRL 2, 0x01
+#define TSC210X_DAC_GAIN_CTRL 2, 0x02
+#define TSC2101_MIXER_GAIN_CTRL 2, 0x03
+#define TSC210X_AUDIO2_CTRL 2, 0x04
+#define TSC210X_POWER_CTRL 2, 0x05
+#define TSC210X_AUDIO3_CTRL 2, 0x06
+#define TSC210X_LCH_BASS_BOOST_N0 2, 0x07
+#define TSC210X_LCH_BASS_BOOST_N1 2, 0x08
+#define TSC210X_LCH_BASS_BOOST_N2 2, 0x09
+#define TSC210X_LCH_BASS_BOOST_N3 2, 0x0a
+#define TSC210X_LCH_BASS_BOOST_N4 2, 0x0b
+#define TSC210X_LCH_BASS_BOOST_N5 2, 0x0c
+#define TSC210X_LCH_BASS_BOOST_D1 2, 0x0d
+#define TSC210X_LCH_BASS_BOOST_D2 2, 0x0e
+#define TSC210X_LCH_BASS_BOOST_D4 2, 0x0f
+#define TSC210X_LCH_BASS_BOOST_D5 2, 0x10
+#define TSC210X_RCH_BASS_BOOST_N0 2, 0x11
+#define TSC210X_RCH_BASS_BOOST_N1 2, 0x12
+#define TSC210X_RCH_BASS_BOOST_N2 2, 0x13
+#define TSC210X_RCH_BASS_BOOST_N3 2, 0x14
+#define TSC210X_RCH_BASS_BOOST_N4 2, 0x15
+#define TSC210X_RCH_BASS_BOOST_N5 2, 0x16
+#define TSC210X_RCH_BASS_BOOST_D1 2, 0x17
+#define TSC210X_RCH_BASS_BOOST_D2 2, 0x18
+#define TSC210X_RCH_BASS_BOOST_D4 2, 0x19
+#define TSC210X_RCH_BASS_BOOST_D5 2, 0x1a
+#define TSC210X_PLL1_CTRL 2, 0x1b
+#define TSC210X_PLL2_CTRL 2, 0x1c
+#define TSC210X_AUDIO4_CTRL 2, 0x1d
+#define TSC2101_HANDSET_GAIN_CTRL 2, 0x1e
+#define TSC2101_CELL_GAIN_CTRL 2, 0x1f
+#define TSC2101_AUIDO5_CTRL 2, 0x20
+#define TSC2101_AUDIO6_CTRL 2, 0x21
+#define TSC2101_AUDIO7_CTRL 2, 0x22
+#define TSC2101_GPIO_CTRL 2, 0x23
+#define TSC2101_IN_AGC_CTRL 2, 0x24
+#define TSC2101_POWER_STATUS 2, 0x25
+#define TSC2101_MIX_AGC_CTRL 2, 0x26
+#define TSC2101_CELL_AGC_CTRL 2, 0x27
+
+/* Field masks for Audio Control 1 */
+#define AC1_WLEN(ARG) (((ARG) & 0x03) << 10)
+#define AC1_DATFM(ARG) (((ARG) & 0x03) << 8)
+#define AC1_DACFS(ARG) ((ARG) & 0x3f)
+
+/* Field masks for TSC2102_DAC_GAIN_CTRL */
+#define DGC_DALMU (1 << 15)
+#define DGC_DALVL(ARG) (((ARG) & 0x7f) << 8)
+#define DGC_DARMU (1 << 7)
+#define DGC_DARVL(ARG) (((ARG) & 0x7f))
+
+/* Field formats for TSC210X_AUDIO2_CTRL */
+#define AC2_KCLEN (1 << 15)
+#define AC2_KCLAC(ARG) (((ARG) & 0x07) << 12)
+#define AC2_KCLFRQ(ARG) (((ARG) & 0x07) << 8)
+#define AC2_KCLLN(ARG) (((ARG) & 0x0f) << 4)
+#define AC2_DLGAF (1 << 3)
+#define AC2_DRGAF (1 << 2)
+#define AC2_DASTC (1 << 1)
+
+/* Field masks for TSC210X_DAC_POWER_CTRL */
+#define CPC_PWDNC (1 << 15)
+#define CPC_DAODRC (1 << 12)
+#define CPC_DAPWDN (1 << 10)
+#define CPC_VGPWDN (1 << 8)
+#define CPC_DAPWDF (1 << 6)
+#define CPC_BASSBC (1 << 1)
+#define CPC_DEEMPF (0x01)
+
+/* Field masks for TSC210X_AUDIO3_CTRL */
+#define AC3_DMSVOL(ARG) (((ARG) & 0x03) << 14)
+#define AC3_REFFS (1 << 13)
+#define AC3_DAXFM (1 << 12)
+#define AC3_SLVMS (1 << 11)
+#define AC3_DALOVF (1 << 7)
+#define AC3_DAROVF (1 << 6)
+#define AC3_REVID(ARG) (((ARG) & 0x07))
+
+/* Field masks for TSC210X_PLL1_CTRL */
+#define PLL1_PLLEN (1 << 15)
+#define PLL1_Q_VAL(ARG) (((ARG) & 0x0f) << 11)
+#define PLL1_P_VAL(ARG) (((ARG) & 0x07) << 8)
+#define PLL1_I_VAL(ARG) (((ARG) & 0x3f) << 2)
+
+/* Field masks for TSC210X_PLL2_CTRL */
+#define PLL2_D_VAL(ARG) (((ARG) & 0x3fff) << 2)
+
+/* Field masks for TSC210X_AUDIO4_CTRL */
+#define AC4_DASTPD (1 << 14)
+
+struct tsc210x_rate_info_s {
+ u16 sample_rate;
+ u8 divisor;
+ u8 fs_44k; /* 44.1 kHz Fsref if 1, 48 kHz if 0 */
+};
+
+#endif /* __LINUX_SPI_TSC210X_H */
projects / linux-2.6-omap-h63xx.git / commitdiff