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Diffstat (limited to 'drivers/mxc/pmic/mc13783/pmic_adc.c')
-rw-r--r--drivers/mxc/pmic/mc13783/pmic_adc.c1541
1 files changed, 1541 insertions, 0 deletions
diff --git a/drivers/mxc/pmic/mc13783/pmic_adc.c b/drivers/mxc/pmic/mc13783/pmic_adc.c
new file mode 100644
index 000000000000..482d0ee08e39
--- /dev/null
+++ b/drivers/mxc/pmic/mc13783/pmic_adc.c
@@ -0,0 +1,1541 @@
+/*
+ * Copyright 2004-2010 Freescale Semiconductor, Inc. All Rights Reserved.
+ */
+
+/*
+ * The code contained herein is licensed under the GNU General Public
+ * License. You may obtain a copy of the GNU General Public License
+ * Version 2 or later at the following locations:
+ *
+ * http://www.opensource.org/licenses/gpl-license.html
+ * http://www.gnu.org/copyleft/gpl.html
+ */
+
+/*!
+ * @file mc13783/pmic_adc.c
+ * @brief This is the main file of PMIC(mc13783) ADC driver.
+ *
+ * @ingroup PMIC_ADC
+ */
+
+/*
+ * Includes
+ */
+
+#include <linux/slab.h>
+#include <linux/platform_device.h>
+#include <linux/poll.h>
+#include <linux/sched.h>
+#include <linux/time.h>
+#include <linux/delay.h>
+#include <linux/wait.h>
+#include <linux/pmic_adc.h>
+#include <linux/pmic_status.h>
+
+#include "../core/pmic.h"
+#include "pmic_adc_defs.h"
+
+#define NB_ADC_REG 5
+
+static int pmic_adc_major;
+
+/* internal function */
+static void callback_tsi(void *);
+static void callback_adcdone(void *);
+static void callback_adcbisdone(void *);
+static void callback_adc_comp_high(void *);
+
+/*!
+ * Number of users waiting in suspendq
+ */
+static int swait;
+
+/*!
+ * To indicate whether any of the adc devices are suspending
+ */
+static int suspend_flag;
+
+/*!
+ * The suspendq is used by blocking application calls
+ */
+static wait_queue_head_t suspendq;
+
+static struct class *pmic_adc_class;
+
+/*
+ * ADC mc13783 API
+ */
+/* EXPORTED FUNCTIONS */
+EXPORT_SYMBOL(pmic_adc_init);
+EXPORT_SYMBOL(pmic_adc_deinit);
+EXPORT_SYMBOL(pmic_adc_convert);
+EXPORT_SYMBOL(pmic_adc_convert_8x);
+EXPORT_SYMBOL(pmic_adc_convert_multichnnel);
+EXPORT_SYMBOL(pmic_adc_set_touch_mode);
+EXPORT_SYMBOL(pmic_adc_get_touch_mode);
+EXPORT_SYMBOL(pmic_adc_get_touch_sample);
+EXPORT_SYMBOL(pmic_adc_get_battery_current);
+EXPORT_SYMBOL(pmic_adc_active_comparator);
+EXPORT_SYMBOL(pmic_adc_deactive_comparator);
+
+static DECLARE_COMPLETION(adcdone_it);
+static DECLARE_COMPLETION(adcbisdone_it);
+static DECLARE_COMPLETION(adc_tsi);
+static pmic_event_callback_t tsi_event;
+static pmic_event_callback_t event_adc;
+static pmic_event_callback_t event_adc_bis;
+static pmic_event_callback_t adc_comp_h;
+static bool data_ready_adc_1;
+static bool data_ready_adc_2;
+static bool adc_ts;
+static bool wait_ts;
+static bool monitor_en;
+static bool monitor_adc;
+static t_check_mode wcomp_mode;
+static DECLARE_MUTEX(convert_mutex);
+
+void (*monitoring_cb) (void); /*call back to be called when event is detected. */
+
+static DECLARE_WAIT_QUEUE_HEAD(queue_adc_busy);
+static t_adc_state adc_dev[2];
+
+static unsigned channel_num[] = {
+ 0,
+ 1,
+ 3,
+ 4,
+ 2,
+ 12,
+ 13,
+ 14,
+ 15,
+ -1,
+ 5,
+ 6,
+ 7,
+ 8,
+ 9,
+ 10,
+ 11,
+ 7,
+ 6,
+ -1,
+ -1,
+ -1,
+ -1,
+ 5,
+ 7
+};
+
+static bool pmic_adc_ready;
+
+int is_pmic_adc_ready()
+{
+ return pmic_adc_ready;
+}
+EXPORT_SYMBOL(is_pmic_adc_ready);
+
+
+/*!
+ * This is the suspend of power management for the mc13783 ADC API.
+ * It supports SAVE and POWER_DOWN state.
+ *
+ * @param pdev the device
+ * @param state the state
+ *
+ * @return This function returns 0 if successful.
+ */
+static int pmic_adc_suspend(struct platform_device *pdev, pm_message_t state)
+{
+ unsigned int reg_value = 0;
+ suspend_flag = 1;
+ CHECK_ERROR(pmic_write_reg(REG_ADC_0, DEF_ADC_0, PMIC_ALL_BITS));
+ CHECK_ERROR(pmic_write_reg(REG_ADC_1, reg_value, PMIC_ALL_BITS));
+ CHECK_ERROR(pmic_write_reg(REG_ADC_2, reg_value, PMIC_ALL_BITS));
+ CHECK_ERROR(pmic_write_reg(REG_ADC_3, DEF_ADC_3, PMIC_ALL_BITS));
+ CHECK_ERROR(pmic_write_reg(REG_ADC_4, reg_value, PMIC_ALL_BITS));
+
+ return 0;
+};
+
+/*!
+ * This is the resume of power management for the mc13783 adc API.
+ * It supports RESTORE state.
+ *
+ * @param pdev the device
+ *
+ * @return This function returns 0 if successful.
+ */
+static int pmic_adc_resume(struct platform_device *pdev)
+{
+ /* nothing for mc13783 adc */
+ unsigned int adc_0_reg, adc_1_reg;
+ suspend_flag = 0;
+
+ /* let interrupt of TSI again */
+ adc_0_reg = ADC_WAIT_TSI_0;
+ CHECK_ERROR(pmic_write_reg(REG_ADC_0, adc_0_reg, PMIC_ALL_BITS));
+ adc_1_reg = ADC_WAIT_TSI_1 | (ADC_BIS * adc_ts);
+ CHECK_ERROR(pmic_write_reg(REG_ADC_1, adc_1_reg, PMIC_ALL_BITS));
+
+ while (swait > 0) {
+ swait--;
+ wake_up_interruptible(&suspendq);
+ }
+
+ return 0;
+};
+
+/*
+ * Call back functions
+ */
+
+/*!
+ * This is the callback function called on TSI mc13783 event, used in synchronous call.
+ */
+static void callback_tsi(void *unused)
+{
+ pr_debug("*** TSI IT mc13783 PMIC_ADC_GET_TOUCH_SAMPLE ***\n");
+ if (wait_ts) {
+ complete(&adc_tsi);
+ pmic_event_mask(EVENT_TSI);
+ }
+}
+
+/*!
+ * This is the callback function called on ADCDone mc13783 event.
+ */
+static void callback_adcdone(void *unused)
+{
+ if (data_ready_adc_1) {
+ complete(&adcdone_it);
+ }
+}
+
+/*!
+ * This is the callback function called on ADCDone mc13783 event.
+ */
+static void callback_adcbisdone(void *unused)
+{
+ pr_debug("* adcdone bis it callback *\n");
+ if (data_ready_adc_2) {
+ complete(&adcbisdone_it);
+ }
+}
+
+/*!
+ * This is the callback function called on mc13783 event.
+ */
+static void callback_adc_comp_high(void *unused)
+{
+ pr_debug("* adc comp it high *\n");
+ if (wcomp_mode == CHECK_HIGH || wcomp_mode == CHECK_LOW_OR_HIGH) {
+ /* launch callback */
+ if (monitoring_cb != NULL) {
+ monitoring_cb();
+ }
+ }
+}
+
+/*!
+ * This function performs filtering and rejection of excessive noise prone
+ * samples.
+ *
+ * @param ts_curr Touch screen value
+ *
+ * @return This function returns 0 on success, -1 otherwise.
+ */
+static int pmic_adc_filter(t_touch_screen *ts_curr)
+{
+ unsigned int ydiff1, ydiff2, ydiff3, xdiff1, xdiff2, xdiff3;
+ unsigned int sample_sumx, sample_sumy;
+ static unsigned int prev_x[FILTLEN], prev_y[FILTLEN];
+ int index = 0;
+ unsigned int y_curr, x_curr;
+ static int filt_count;
+ /* Added a variable filt_type to decide filtering at run-time */
+ unsigned int filt_type = 0;
+
+ if (ts_curr->contact_resistance == 0) {
+ ts_curr->x_position = 0;
+ ts_curr->y_position = 0;
+ filt_count = 0;
+ return 0;
+ }
+
+ ydiff1 = abs(ts_curr->y_position1 - ts_curr->y_position2);
+ ydiff2 = abs(ts_curr->y_position2 - ts_curr->y_position3);
+ ydiff3 = abs(ts_curr->y_position1 - ts_curr->y_position3);
+ if ((ydiff1 > DELTA_Y_MAX) ||
+ (ydiff2 > DELTA_Y_MAX) || (ydiff3 > DELTA_Y_MAX)) {
+ pr_debug("pmic_adc_filter: Ret pos 1\n");
+ return -1;
+ }
+
+ xdiff1 = abs(ts_curr->x_position1 - ts_curr->x_position2);
+ xdiff2 = abs(ts_curr->x_position2 - ts_curr->x_position3);
+ xdiff3 = abs(ts_curr->x_position1 - ts_curr->x_position3);
+
+ if ((xdiff1 > DELTA_X_MAX) ||
+ (xdiff2 > DELTA_X_MAX) || (xdiff3 > DELTA_X_MAX)) {
+ pr_debug("mc13783_adc_filter: Ret pos 2\n");
+ return -1;
+ }
+ /* Compute two closer values among the three available Y readouts */
+
+ if (ydiff1 < ydiff2) {
+ if (ydiff1 < ydiff3) {
+ /* Sample 0 & 1 closest together */
+ sample_sumy = ts_curr->y_position1 +
+ ts_curr->y_position2;
+ } else {
+ /* Sample 0 & 2 closest together */
+ sample_sumy = ts_curr->y_position1 +
+ ts_curr->y_position3;
+ }
+ } else {
+ if (ydiff2 < ydiff3) {
+ /* Sample 1 & 2 closest together */
+ sample_sumy = ts_curr->y_position2 +
+ ts_curr->y_position3;
+ } else {
+ /* Sample 0 & 2 closest together */
+ sample_sumy = ts_curr->y_position1 +
+ ts_curr->y_position3;
+ }
+ }
+
+ /*
+ * Compute two closer values among the three available X
+ * readouts
+ */
+ if (xdiff1 < xdiff2) {
+ if (xdiff1 < xdiff3) {
+ /* Sample 0 & 1 closest together */
+ sample_sumx = ts_curr->x_position1 +
+ ts_curr->x_position2;
+ } else {
+ /* Sample 0 & 2 closest together */
+ sample_sumx = ts_curr->x_position1 +
+ ts_curr->x_position3;
+ }
+ } else {
+ if (xdiff2 < xdiff3) {
+ /* Sample 1 & 2 closest together */
+ sample_sumx = ts_curr->x_position2 +
+ ts_curr->x_position3;
+ } else {
+ /* Sample 0 & 2 closest together */
+ sample_sumx = ts_curr->x_position1 +
+ ts_curr->x_position3;
+ }
+ }
+ /*
+ * Wait FILTER_MIN_DELAY number of samples to restart
+ * filtering
+ */
+ if (filt_count < FILTER_MIN_DELAY) {
+ /*
+ * Current output is the average of the two closer
+ * values and no filtering is used
+ */
+ y_curr = (sample_sumy / 2);
+ x_curr = (sample_sumx / 2);
+ ts_curr->y_position = y_curr;
+ ts_curr->x_position = x_curr;
+ filt_count++;
+ } else {
+ if (abs(sample_sumx - (prev_x[0] + prev_x[1])) >
+ (DELTA_X_MAX * 16)) {
+ pr_debug("pmic_adc_filter: : Ret pos 3\n");
+ return -1;
+ }
+ if (abs(sample_sumy - (prev_y[0] + prev_y[1])) >
+ (DELTA_Y_MAX * 16)) {
+ return -1;
+ }
+ sample_sumy /= 2;
+ sample_sumx /= 2;
+ /* Use hard filtering if the sample difference < 10 */
+ if ((abs(sample_sumy - prev_y[0]) > 10) ||
+ (abs(sample_sumx - prev_x[0]) > 10)) {
+ filt_type = 1;
+ }
+
+ /*
+ * Current outputs are the average of three previous
+ * values and the present readout
+ */
+ y_curr = sample_sumy;
+ for (index = 0; index < FILTLEN; index++) {
+ if (filt_type == 0) {
+ y_curr = y_curr + (prev_y[index]);
+ } else {
+ y_curr = y_curr + (prev_y[index] / 3);
+ }
+ }
+ if (filt_type == 0) {
+ y_curr = y_curr >> 2;
+ } else {
+ y_curr = y_curr >> 1;
+ }
+ ts_curr->y_position = y_curr;
+
+ x_curr = sample_sumx;
+ for (index = 0; index < FILTLEN; index++) {
+ if (filt_type == 0) {
+ x_curr = x_curr + (prev_x[index]);
+ } else {
+ x_curr = x_curr + (prev_x[index] / 3);
+ }
+ }
+ if (filt_type == 0) {
+ x_curr = x_curr >> 2;
+ } else {
+ x_curr = x_curr >> 1;
+ }
+ ts_curr->x_position = x_curr;
+
+ }
+
+ /* Update previous X and Y values */
+ for (index = (FILTLEN - 1); index > 0; index--) {
+ prev_x[index] = prev_x[index - 1];
+ prev_y[index] = prev_y[index - 1];
+ }
+
+ /*
+ * Current output will be the most recent past for the
+ * next sample
+ */
+ prev_y[0] = y_curr;
+ prev_x[0] = x_curr;
+
+ return 0;
+}
+
+/*!
+ * This function implements the open method on a MC13783 ADC device.
+ *
+ * @param inode pointer on the node
+ * @param file pointer on the file
+ * @return This function returns 0.
+ */
+static int pmic_adc_open(struct inode *inode, struct file *file)
+{
+ while (suspend_flag == 1) {
+ swait++;
+ /* Block if the device is suspended */
+ if (wait_event_interruptible(suspendq, (suspend_flag == 0))) {
+ return -ERESTARTSYS;
+ }
+ }
+ pr_debug("mc13783_adc : mc13783_adc_open()\n");
+ return 0;
+}
+
+/*!
+ * This function implements the release method on a MC13783 ADC device.
+ *
+ * @param inode pointer on the node
+ * @param file pointer on the file
+ * @return This function returns 0.
+ */
+static int pmic_adc_free(struct inode *inode, struct file *file)
+{
+ pr_debug("mc13783_adc : mc13783_adc_free()\n");
+ return 0;
+}
+
+/*!
+ * This function initializes all ADC registers with default values. This
+ * function also registers the interrupt events.
+ *
+ * @return This function returns PMIC_SUCCESS if successful.
+ */
+int pmic_adc_init(void)
+{
+ unsigned int reg_value = 0, i = 0;
+
+ if (suspend_flag == 1) {
+ return -EBUSY;
+ }
+ for (i = 0; i < ADC_NB_AVAILABLE; i++) {
+ adc_dev[i] = ADC_FREE;
+ }
+ CHECK_ERROR(pmic_write_reg(REG_ADC_0, DEF_ADC_0, PMIC_ALL_BITS));
+ CHECK_ERROR(pmic_write_reg(REG_ADC_1, reg_value, PMIC_ALL_BITS));
+ CHECK_ERROR(pmic_write_reg(REG_ADC_2, reg_value, PMIC_ALL_BITS));
+ CHECK_ERROR(pmic_write_reg(REG_ADC_3, DEF_ADC_3, PMIC_ALL_BITS));
+ CHECK_ERROR(pmic_write_reg(REG_ADC_4, reg_value, PMIC_ALL_BITS));
+ reg_value = 0x001000;
+ CHECK_ERROR(pmic_write_reg(REG_ARBITRATION_PERIPHERAL_AUDIO, reg_value,
+ 0xFFFFFF));
+
+ data_ready_adc_1 = false;
+ data_ready_adc_2 = false;
+ adc_ts = false;
+ wait_ts = false;
+ monitor_en = false;
+ monitor_adc = false;
+ wcomp_mode = CHECK_LOW;
+ monitoring_cb = NULL;
+ /* sub to ADCDone IT */
+ event_adc.param = NULL;
+ event_adc.func = callback_adcdone;
+ CHECK_ERROR(pmic_event_subscribe(EVENT_ADCDONEI, event_adc));
+
+ /* sub to ADCDoneBis IT */
+ event_adc_bis.param = NULL;
+ event_adc_bis.func = callback_adcbisdone;
+ CHECK_ERROR(pmic_event_subscribe(EVENT_ADCBISDONEI, event_adc_bis));
+
+ /* sub to Touch Screen IT */
+ tsi_event.param = NULL;
+ tsi_event.func = callback_tsi;
+ CHECK_ERROR(pmic_event_subscribe(EVENT_TSI, tsi_event));
+
+ /* ADC reading above high limit */
+ adc_comp_h.param = NULL;
+ adc_comp_h.func = callback_adc_comp_high;
+ CHECK_ERROR(pmic_event_subscribe(EVENT_WHIGHI, adc_comp_h));
+
+ return PMIC_SUCCESS;
+}
+
+/*!
+ * This function disables the ADC, de-registers the interrupt events.
+ *
+ * @return This function returns PMIC_SUCCESS if successful.
+ */
+PMIC_STATUS pmic_adc_deinit(void)
+{
+ CHECK_ERROR(pmic_event_unsubscribe(EVENT_ADCDONEI, event_adc));
+ CHECK_ERROR(pmic_event_unsubscribe(EVENT_ADCBISDONEI, event_adc_bis));
+ CHECK_ERROR(pmic_event_unsubscribe(EVENT_TSI, tsi_event));
+ CHECK_ERROR(pmic_event_unsubscribe(EVENT_WHIGHI, adc_comp_h));
+
+ return PMIC_SUCCESS;
+}
+
+/*!
+ * This function initializes adc_param structure.
+ *
+ * @param adc_param Structure to be initialized.
+ *
+ * @return This function returns 0 if successful.
+ */
+int mc13783_adc_init_param(t_adc_param *adc_param)
+{
+ int i = 0;
+
+ if (suspend_flag == 1) {
+ return -EBUSY;
+ }
+ adc_param->delay = 0;
+ adc_param->conv_delay = false;
+ adc_param->single_channel = false;
+ adc_param->group = false;
+ adc_param->channel_0 = BATTERY_VOLTAGE;
+ adc_param->channel_1 = BATTERY_VOLTAGE;
+ adc_param->read_mode = 0;
+ adc_param->wait_tsi = 0;
+ adc_param->chrgraw_devide_5 = true;
+ adc_param->read_ts = false;
+ adc_param->ts_value.x_position = 0;
+ adc_param->ts_value.y_position = 0;
+ adc_param->ts_value.contact_resistance = 0;
+ for (i = 0; i <= MAX_CHANNEL; i++) {
+ adc_param->value[i] = 0;
+ }
+ return 0;
+}
+
+/*!
+ * This function starts the convert.
+ *
+ * @param adc_param contains all adc configuration and return value.
+ *
+ * @return This function returns 0 if successful.
+ */
+PMIC_STATUS mc13783_adc_convert(t_adc_param *adc_param)
+{
+ bool use_bis = false;
+ unsigned int adc_0_reg = 0, adc_1_reg = 0, reg_1 = 0, result_reg =
+ 0, i = 0;
+ unsigned int result = 0, temp = 0;
+ pmic_version_t mc13783_ver;
+ pr_debug("mc13783 ADC - mc13783_adc_convert ....\n");
+ if (suspend_flag == 1) {
+ return -EBUSY;
+ }
+
+ if (adc_param->wait_tsi) {
+ /* we need to set ADCEN 1 for TSI interrupt on mc13783 1.x */
+ /* configure adc to wait tsi interrupt */
+ INIT_COMPLETION(adc_tsi);
+ pr_debug("mc13783 ADC - pmic_write_reg ....\n");
+ /*for ts don't use bis */
+ adc_0_reg = 0x001c00 | (ADC_BIS * 0);
+ pmic_event_unmask(EVENT_TSI);
+ CHECK_ERROR(pmic_write_reg
+ (REG_ADC_0, adc_0_reg, PMIC_ALL_BITS));
+ /*for ts don't use bis */
+ adc_1_reg = 0x200001 | (ADC_BIS * 0);
+ CHECK_ERROR(pmic_write_reg
+ (REG_ADC_1, adc_1_reg, PMIC_ALL_BITS));
+ pr_debug("wait tsi ....\n");
+ wait_ts = true;
+ wait_for_completion_interruptible(&adc_tsi);
+ wait_ts = false;
+ }
+ if (adc_param->read_ts == false)
+ down(&convert_mutex);
+ use_bis = mc13783_adc_request(adc_param->read_ts);
+ if (use_bis < 0) {
+ pr_debug("process has received a signal and got interrupted\n");
+ return -EINTR;
+ }
+
+ /* CONFIGURE ADC REG 0 */
+ adc_0_reg = 0;
+ adc_1_reg = 0;
+ if (adc_param->read_ts == false) {
+ adc_0_reg = adc_param->read_mode & 0x00003F;
+ /* add auto inc */
+ adc_0_reg |= ADC_INC;
+ if (use_bis) {
+ /* add adc bis */
+ adc_0_reg |= ADC_BIS;
+ }
+ mc13783_ver = pmic_get_version();
+ if (mc13783_ver.revision >= 20) {
+ if (adc_param->chrgraw_devide_5) {
+ adc_0_reg |= ADC_CHRGRAW_D5;
+ }
+ }
+ if (adc_param->single_channel) {
+ adc_1_reg |= ADC_SGL_CH;
+ }
+
+ if (adc_param->conv_delay) {
+ adc_1_reg |= ADC_ATO;
+ }
+
+ if (adc_param->group) {
+ adc_1_reg |= ADC_ADSEL;
+ }
+
+ if (adc_param->single_channel) {
+ adc_1_reg |= ADC_SGL_CH;
+ }
+
+ adc_1_reg |= (adc_param->channel_0 << ADC_CH_0_POS) &
+ ADC_CH_0_MASK;
+ adc_1_reg |= (adc_param->channel_1 << ADC_CH_1_POS) &
+ ADC_CH_1_MASK;
+ } else {
+ adc_0_reg = 0x003c00 | (ADC_BIS * use_bis) | ADC_INC;
+ }
+ pr_debug("Write Reg %i = %x\n", REG_ADC_0, adc_0_reg);
+ /*Change has been made here */
+ CHECK_ERROR(pmic_write_reg(REG_ADC_0, adc_0_reg,
+ ADC_INC | ADC_BIS | ADC_CHRGRAW_D5 |
+ 0xfff00ff));
+ /* CONFIGURE ADC REG 1 */
+ if (adc_param->read_ts == false) {
+ adc_1_reg |= ADC_NO_ADTRIG;
+ adc_1_reg |= ADC_EN;
+ adc_1_reg |= (adc_param->delay << ADC_DELAY_POS) &
+ ADC_DELAY_MASK;
+ if (use_bis) {
+ adc_1_reg |= ADC_BIS;
+ }
+ } else {
+ /* configure and start convert to read x and y position */
+ /* configure to read 2 value in channel selection 1 & 2 */
+ adc_1_reg = 0x100409 | (ADC_BIS * use_bis) | ADC_NO_ADTRIG;
+ }
+ reg_1 = adc_1_reg;
+ if (use_bis == 0) {
+ data_ready_adc_1 = false;
+ adc_1_reg |= ASC_ADC;
+ data_ready_adc_1 = true;
+ pr_debug("Write Reg %i = %x\n", REG_ADC_1, adc_1_reg);
+ INIT_COMPLETION(adcdone_it);
+ CHECK_ERROR(pmic_write_reg(REG_ADC_1, adc_1_reg,
+ ADC_SGL_CH | ADC_ATO | ADC_ADSEL
+ | ADC_CH_0_MASK | ADC_CH_1_MASK |
+ ADC_NO_ADTRIG | ADC_EN |
+ ADC_DELAY_MASK | ASC_ADC | ADC_BIS));
+ pr_debug("wait adc done \n");
+ wait_for_completion_interruptible(&adcdone_it);
+ data_ready_adc_1 = false;
+ } else {
+ data_ready_adc_2 = false;
+ adc_1_reg |= ASC_ADC;
+ data_ready_adc_2 = true;
+ INIT_COMPLETION(adcbisdone_it);
+ CHECK_ERROR(pmic_write_reg(REG_ADC_1, adc_1_reg, 0xFFFFFF));
+ temp = 0x800000;
+ CHECK_ERROR(pmic_write_reg(REG_ADC_3, temp, 0xFFFFFF));
+ temp = 0x001000;
+ pmic_write_reg(REG_ARBITRATION_PERIPHERAL_AUDIO, temp,
+ 0xFFFFFF);
+ pr_debug("wait adc done bis\n");
+ wait_for_completion_interruptible(&adcbisdone_it);
+ data_ready_adc_2 = false;
+ }
+ /* read result and store in adc_param */
+ result = 0;
+ if (use_bis == 0) {
+ result_reg = REG_ADC_2;
+ } else {
+ result_reg = REG_ADC_4;
+ }
+ CHECK_ERROR(pmic_write_reg(REG_ADC_1, 4 << ADC_CH_1_POS,
+ ADC_CH_0_MASK | ADC_CH_1_MASK));
+
+ for (i = 0; i <= 3; i++) {
+ CHECK_ERROR(pmic_read_reg(result_reg, &result, PMIC_ALL_BITS));
+ pr_debug("result %i = %x\n", result_reg, result);
+ adc_param->value[i] = ((result & ADD1_RESULT_MASK) >> 2);
+ adc_param->value[i + 4] = ((result & ADD2_RESULT_MASK) >> 14);
+ }
+ if (adc_param->read_ts) {
+ adc_param->ts_value.x_position = adc_param->value[2];
+ adc_param->ts_value.x_position1 = adc_param->value[0];
+ adc_param->ts_value.x_position2 = adc_param->value[1];
+ adc_param->ts_value.x_position3 = adc_param->value[2];
+ adc_param->ts_value.y_position1 = adc_param->value[3];
+ adc_param->ts_value.y_position2 = adc_param->value[4];
+ adc_param->ts_value.y_position3 = adc_param->value[5];
+ adc_param->ts_value.y_position = adc_param->value[5];
+ adc_param->ts_value.contact_resistance = adc_param->value[6];
+
+ }
+
+ /*if (adc_param->read_ts) {
+ adc_param->ts_value.x_position = adc_param->value[2];
+ adc_param->ts_value.y_position = adc_param->value[5];
+ adc_param->ts_value.contact_resistance = adc_param->value[6];
+ } */
+ mc13783_adc_release(use_bis);
+ if (adc_param->read_ts == false)
+ up(&convert_mutex);
+
+ return PMIC_SUCCESS;
+}
+
+/*!
+ * This function select the required read_mode for a specific channel.
+ *
+ * @param channel The channel to be sampled
+ *
+ * @return This function returns the requires read_mode
+ */
+t_reading_mode mc13783_set_read_mode(t_channel channel)
+{
+ t_reading_mode read_mode = 0;
+
+ switch (channel) {
+ case LICELL:
+ read_mode = M_LITHIUM_CELL;
+ break;
+ case CHARGE_CURRENT:
+ read_mode = M_CHARGE_CURRENT;
+ break;
+ case BATTERY_CURRENT:
+ read_mode = M_BATTERY_CURRENT;
+ break;
+ case THERMISTOR:
+ read_mode = M_THERMISTOR;
+ break;
+ case DIE_TEMP:
+ read_mode = M_DIE_TEMPERATURE;
+ break;
+ case USB_ID:
+ read_mode = M_UID;
+ break;
+ default:
+ read_mode = 0;
+ }
+
+ return read_mode;
+}
+
+/*!
+ * This function triggers a conversion and returns one sampling result of one
+ * channel.
+ *
+ * @param channel The channel to be sampled
+ * @param result The pointer to the conversion result. The memory
+ * should be allocated by the caller of this function.
+ *
+ * @return This function returns PMIC_SUCCESS if successful.
+ */
+PMIC_STATUS pmic_adc_convert(t_channel channel, unsigned short *result)
+{
+ t_adc_param adc_param;
+ PMIC_STATUS ret;
+
+ if (suspend_flag == 1) {
+ return -EBUSY;
+ }
+
+ channel = channel_num[channel];
+ if (channel == -1) {
+ pr_debug("Wrong channel ID\n");
+ return PMIC_PARAMETER_ERROR;
+ }
+ mc13783_adc_init_param(&adc_param);
+ pr_debug("pmic_adc_convert\n");
+ adc_param.read_ts = false;
+ adc_param.read_mode = mc13783_set_read_mode(channel);
+
+ adc_param.single_channel = true;
+ /* Find the group */
+ if ((channel >= 0) && (channel <= 7)) {
+ adc_param.channel_0 = channel;
+ adc_param.group = false;
+ } else if ((channel >= 8) && (channel <= 15)) {
+ adc_param.channel_0 = channel & 0x07;
+ adc_param.group = true;
+ } else {
+ return PMIC_PARAMETER_ERROR;
+ }
+ ret = mc13783_adc_convert(&adc_param);
+ *result = adc_param.value[0];
+ return ret;
+}
+
+/*!
+ * This function triggers a conversion and returns eight sampling results of
+ * one channel.
+ *
+ * @param channel The channel to be sampled
+ * @param result The pointer to array to store eight sampling results.
+ * The memory should be allocated by the caller of this
+ * function.
+ *
+ * @return This function returns PMIC_SUCCESS if successful.
+ */
+PMIC_STATUS pmic_adc_convert_8x(t_channel channel, unsigned short *result)
+{
+ t_adc_param adc_param;
+ int i;
+ PMIC_STATUS ret;
+ if (suspend_flag == 1) {
+ return -EBUSY;
+ }
+
+ channel = channel_num[channel];
+
+ if (channel == -1) {
+ pr_debug("Wrong channel ID\n");
+ return PMIC_PARAMETER_ERROR;
+ }
+ mc13783_adc_init_param(&adc_param);
+ pr_debug("pmic_adc_convert_8x\n");
+ adc_param.read_ts = false;
+ adc_param.single_channel = true;
+ adc_param.read_mode = mc13783_set_read_mode(channel);
+ if ((channel >= 0) && (channel <= 7)) {
+ adc_param.channel_0 = channel;
+ adc_param.channel_1 = channel;
+ adc_param.group = false;
+ } else if ((channel >= 8) && (channel <= 15)) {
+ adc_param.channel_0 = channel & 0x07;
+ adc_param.channel_1 = channel & 0x07;
+ adc_param.group = true;
+ } else {
+ return PMIC_PARAMETER_ERROR;
+ }
+
+ ret = mc13783_adc_convert(&adc_param);
+ for (i = 0; i <= 7; i++) {
+ result[i] = adc_param.value[i];
+ }
+ return ret;
+}
+
+/*!
+ * This function triggers a conversion and returns sampling results of each
+ * specified channel.
+ *
+ * @param channels This input parameter is bitmap to specify channels
+ * to be sampled.
+ * @param result The pointer to array to store sampling results.
+ * The memory should be allocated by the caller of this
+ * function.
+ *
+ * @return This function returns PMIC_SUCCESS if successful.
+ */
+PMIC_STATUS pmic_adc_convert_multichnnel(t_channel channels,
+ unsigned short *result)
+{
+ t_adc_param adc_param;
+ int i;
+ PMIC_STATUS ret;
+ if (suspend_flag == 1) {
+ return -EBUSY;
+ }
+ mc13783_adc_init_param(&adc_param);
+ pr_debug("pmic_adc_convert_multichnnel\n");
+
+ channels = channel_num[channels];
+
+ if (channels == -1) {
+ pr_debug("Wrong channel ID\n");
+ return PMIC_PARAMETER_ERROR;
+ }
+
+ adc_param.read_ts = false;
+ adc_param.single_channel = false;
+ if ((channels >= 0) && (channels <= 7)) {
+ adc_param.channel_0 = channels;
+ adc_param.channel_1 = ((channels + 4) % 4) + 4;
+ adc_param.group = false;
+ } else if ((channels >= 8) && (channels <= 15)) {
+ channels = channels & 0x07;
+ adc_param.channel_0 = channels;
+ adc_param.channel_1 = ((channels + 4) % 4) + 4;
+ adc_param.group = true;
+ } else {
+ return PMIC_PARAMETER_ERROR;
+ }
+ adc_param.read_mode = 0x00003f;
+ adc_param.read_ts = false;
+ ret = mc13783_adc_convert(&adc_param);
+
+ for (i = 0; i <= 7; i++) {
+ result[i] = adc_param.value[i];
+ }
+ return ret;
+}
+
+/*!
+ * This function sets touch screen operation mode.
+ *
+ * @param touch_mode Touch screen operation mode.
+ *
+ * @return This function returns PMIC_SUCCESS if successful.
+ */
+PMIC_STATUS pmic_adc_set_touch_mode(t_touch_mode touch_mode)
+{
+ if (suspend_flag == 1) {
+ return -EBUSY;
+ }
+ CHECK_ERROR(pmic_write_reg(REG_ADC_0,
+ BITFVAL(MC13783_ADC0_TS_M, touch_mode),
+ BITFMASK(MC13783_ADC0_TS_M)));
+ return PMIC_SUCCESS;
+}
+
+/*!
+ * This function retrieves the current touch screen operation mode.
+ *
+ * @param touch_mode Pointer to the retrieved touch screen operation
+ * mode.
+ *
+ * @return This function returns PMIC_SUCCESS if successful.
+ */
+PMIC_STATUS pmic_adc_get_touch_mode(t_touch_mode *touch_mode)
+{
+ unsigned int value;
+ if (suspend_flag == 1) {
+ return -EBUSY;
+ }
+ CHECK_ERROR(pmic_read_reg(REG_ADC_0, &value, PMIC_ALL_BITS));
+
+ *touch_mode = BITFEXT(value, MC13783_ADC0_TS_M);
+
+ return PMIC_SUCCESS;
+}
+
+/*!
+ * This function retrieves the current touch screen (X,Y) coordinates.
+ *
+ * @param touch_sample Pointer to touch sample.
+ * @param wait indicates whether this call must block or not.
+ *
+ * @return This function returns PMIC_SUCCESS if successful.
+ */
+PMIC_STATUS pmic_adc_get_touch_sample(t_touch_screen *touch_sample, int wait)
+{
+ if (mc13783_adc_read_ts(touch_sample, wait) != 0)
+ return PMIC_ERROR;
+ if (0 == pmic_adc_filter(touch_sample))
+ return PMIC_SUCCESS;
+ else
+ return PMIC_ERROR;
+}
+
+/*!
+ * This function read the touch screen value.
+ *
+ * @param ts_value return value of touch screen
+ * @param wait_tsi if true, this function is synchronous (wait in TSI event).
+ *
+ * @return This function returns 0.
+ */
+PMIC_STATUS mc13783_adc_read_ts(t_touch_screen *ts_value, int wait_tsi)
+{
+ t_adc_param param;
+ pr_debug("mc13783_adc : mc13783_adc_read_ts\n");
+ if (suspend_flag == 1) {
+ return -EBUSY;
+ }
+ if (wait_ts) {
+ pr_debug("mc13783_adc : error TS busy \n");
+ return PMIC_ERROR;
+ }
+ mc13783_adc_init_param(&param);
+ param.wait_tsi = wait_tsi;
+ param.read_ts = true;
+ if (mc13783_adc_convert(&param) != 0)
+ return PMIC_ERROR;
+ /* check if x-y is ok */
+ if ((param.ts_value.x_position1 < TS_X_MAX) &&
+ (param.ts_value.x_position1 >= TS_X_MIN) &&
+ (param.ts_value.y_position1 < TS_Y_MAX) &&
+ (param.ts_value.y_position1 >= TS_Y_MIN) &&
+ (param.ts_value.x_position2 < TS_X_MAX) &&
+ (param.ts_value.x_position2 >= TS_X_MIN) &&
+ (param.ts_value.y_position2 < TS_Y_MAX) &&
+ (param.ts_value.y_position2 >= TS_Y_MIN) &&
+ (param.ts_value.x_position3 < TS_X_MAX) &&
+ (param.ts_value.x_position3 >= TS_X_MIN) &&
+ (param.ts_value.y_position3 < TS_Y_MAX) &&
+ (param.ts_value.y_position3 >= TS_Y_MIN)) {
+ ts_value->x_position = param.ts_value.x_position;
+ ts_value->x_position1 = param.ts_value.x_position1;
+ ts_value->x_position2 = param.ts_value.x_position2;
+ ts_value->x_position3 = param.ts_value.x_position3;
+ ts_value->y_position = param.ts_value.y_position;
+ ts_value->y_position1 = param.ts_value.y_position1;
+ ts_value->y_position2 = param.ts_value.y_position2;
+ ts_value->y_position3 = param.ts_value.y_position3;
+ ts_value->contact_resistance =
+ param.ts_value.contact_resistance + 1;
+
+ } else {
+ ts_value->x_position = 0;
+ ts_value->y_position = 0;
+ ts_value->contact_resistance = 0;
+
+ }
+ return PMIC_SUCCESS;
+}
+
+/*!
+ * This function starts a Battery Current mode conversion.
+ *
+ * @param mode Conversion mode.
+ * @param result Battery Current measurement result.
+ * if \a mode = ADC_8CHAN_1X, the result is \n
+ * result[0] = (BATTP - BATT_I) \n
+ * if \a mode = ADC_1CHAN_8X, the result is \n
+ * result[0] = BATTP \n
+ * result[1] = BATT_I \n
+ * result[2] = BATTP \n
+ * result[3] = BATT_I \n
+ * result[4] = BATTP \n
+ * result[5] = BATT_I \n
+ * result[6] = BATTP \n
+ * result[7] = BATT_I
+ *
+ * @return This function returns PMIC_SUCCESS if successful.
+ */
+PMIC_STATUS pmic_adc_get_battery_current(t_conversion_mode mode,
+ unsigned short *result)
+{
+ PMIC_STATUS ret;
+ t_channel channel;
+ if (suspend_flag == 1) {
+ return -EBUSY;
+ }
+ channel = BATTERY_CURRENT;
+ if (mode == ADC_8CHAN_1X) {
+ ret = pmic_adc_convert(channel, result);
+ } else {
+ ret = pmic_adc_convert_8x(channel, result);
+ }
+ return ret;
+}
+
+/*!
+ * This function request a ADC.
+ *
+ * @return This function returns index of ADC to be used (0 or 1) if successful.
+ * return -1 if error.
+ */
+int mc13783_adc_request(bool read_ts)
+{
+ int adc_index = -1;
+ if (read_ts != 0) {
+ /*for ts we use bis=0 */
+ if (adc_dev[0] == ADC_USED)
+ return -1;
+ /*no wait here */
+ adc_dev[0] = ADC_USED;
+ adc_index = 0;
+ } else {
+ /*for other adc use bis = 1 */
+ if (adc_dev[1] == ADC_USED) {
+ return -1;
+ /*no wait here */
+ }
+ adc_dev[1] = ADC_USED;
+ adc_index = 1;
+ }
+ pr_debug("mc13783_adc : request ADC %d\n", adc_index);
+ return adc_index;
+}
+
+/*!
+ * This function release an ADC.
+ *
+ * @param adc_index index of ADC to be released.
+ *
+ * @return This function returns 0 if successful.
+ */
+int mc13783_adc_release(int adc_index)
+{
+ while (suspend_flag == 1) {
+ swait++;
+ /* Block if the device is suspended */
+ if (wait_event_interruptible(suspendq, (suspend_flag == 0))) {
+ return -ERESTARTSYS;
+ }
+ }
+
+ pr_debug("mc13783_adc : release ADC %d\n", adc_index);
+ if ((adc_dev[adc_index] == ADC_MONITORING) ||
+ (adc_dev[adc_index] == ADC_USED)) {
+ adc_dev[adc_index] = ADC_FREE;
+ wake_up(&queue_adc_busy);
+ return 0;
+ }
+ return -1;
+}
+
+/*!
+ * This function initializes monitoring structure.
+ *
+ * @param monitor Structure to be initialized.
+ *
+ * @return This function returns 0 if successful.
+ */
+int mc13783_adc_init_monitor_param(t_monitoring_param *monitor)
+{
+ pr_debug("mc13783_adc : init monitor\n");
+ monitor->delay = 0;
+ monitor->conv_delay = false;
+ monitor->channel = BATTERY_VOLTAGE;
+ monitor->read_mode = 0;
+ monitor->comp_low = 0;
+ monitor->comp_high = 0;
+ monitor->group = 0;
+ monitor->check_mode = CHECK_LOW_OR_HIGH;
+ monitor->callback = NULL;
+ return 0;
+}
+
+/*!
+ * This function actives the comparator. When comparator is active and ADC
+ * is enabled, the 8th converted value will be digitally compared against the
+ * window defined by WLOW and WHIGH registers.
+ *
+ * @param low Comparison window low threshold (WLOW).
+ * @param high Comparison window high threshold (WHIGH).
+ * @param channel The channel to be sampled
+ * @param callback Callback function to be called when the converted
+ * value is beyond the comparison window. The callback
+ * function will pass a parameter of type
+ * \b t_comp_expection to indicate the reason of
+ * comparator exception.
+ *
+ * @return This function returns PMIC_SUCCESS if successful.
+ */
+PMIC_STATUS pmic_adc_active_comparator(unsigned char low,
+ unsigned char high,
+ t_channel channel,
+ t_comparator_cb callback)
+{
+ bool use_bis = false;
+ unsigned int adc_0_reg = 0, adc_1_reg = 0, adc_3_reg = 0;
+ t_monitoring_param monitoring;
+
+ if (suspend_flag == 1) {
+ return -EBUSY;
+ }
+ if (monitor_en) {
+ pr_debug("mc13783_adc : monitoring already configured\n");
+ return PMIC_ERROR;
+ }
+ monitor_en = true;
+ mc13783_adc_init_monitor_param(&monitoring);
+ monitoring.comp_low = low;
+ monitoring.comp_high = high;
+ monitoring.channel = channel;
+ monitoring.callback = (void *)callback;
+
+ use_bis = mc13783_adc_request(false);
+ if (use_bis < 0) {
+ pr_debug("mc13783_adc : request error\n");
+ return PMIC_ERROR;
+ }
+ monitor_adc = use_bis;
+
+ adc_0_reg = 0;
+
+ /* TO DO ADOUT CONFIGURE */
+ adc_0_reg = monitoring.read_mode & ADC_MODE_MASK;
+ if (use_bis) {
+ /* add adc bis */
+ adc_0_reg |= ADC_BIS;
+ }
+ adc_0_reg |= ADC_WCOMP;
+
+ /* CONFIGURE ADC REG 1 */
+ adc_1_reg = 0;
+ adc_1_reg |= ADC_EN;
+ if (monitoring.conv_delay) {
+ adc_1_reg |= ADC_ATO;
+ }
+ if (monitoring.group) {
+ adc_1_reg |= ADC_ADSEL;
+ }
+ adc_1_reg |= (monitoring.channel << ADC_CH_0_POS) & ADC_CH_0_MASK;
+ adc_1_reg |= (monitoring.delay << ADC_DELAY_POS) & ADC_DELAY_MASK;
+ if (use_bis) {
+ adc_1_reg |= ADC_BIS;
+ }
+
+ adc_3_reg |= (monitoring.comp_high << ADC_WCOMP_H_POS) &
+ ADC_WCOMP_H_MASK;
+ adc_3_reg |= (monitoring.comp_low << ADC_WCOMP_L_POS) &
+ ADC_WCOMP_L_MASK;
+ if (use_bis) {
+ adc_3_reg |= ADC_BIS;
+ }
+
+ wcomp_mode = monitoring.check_mode;
+ /* call back to be called when event is detected. */
+ monitoring_cb = monitoring.callback;
+
+ CHECK_ERROR(pmic_write_reg(REG_ADC_0, adc_0_reg, PMIC_ALL_BITS));
+ CHECK_ERROR(pmic_write_reg(REG_ADC_1, adc_1_reg, PMIC_ALL_BITS));
+ CHECK_ERROR(pmic_write_reg(REG_ADC_3, adc_3_reg, PMIC_ALL_BITS));
+ return PMIC_SUCCESS;
+}
+
+/*!
+ * This function deactivates the comparator.
+ *
+ * @return This function returns PMIC_SUCCESS if successful.
+ */
+PMIC_STATUS pmic_adc_deactive_comparator(void)
+{
+ unsigned int reg_value = 0;
+
+ if (suspend_flag == 1) {
+ return -EBUSY;
+ }
+ if (!monitor_en) {
+ pr_debug("mc13783_adc : adc monitoring free\n");
+ return PMIC_ERROR;
+ }
+
+ if (monitor_en) {
+ reg_value = ADC_BIS;
+ }
+
+ /* clear all reg value */
+ CHECK_ERROR(pmic_write_reg(REG_ADC_0, reg_value, PMIC_ALL_BITS));
+ CHECK_ERROR(pmic_write_reg(REG_ADC_1, reg_value, PMIC_ALL_BITS));
+ CHECK_ERROR(pmic_write_reg(REG_ADC_3, reg_value, PMIC_ALL_BITS));
+
+ reg_value = 0;
+
+ if (monitor_adc) {
+ CHECK_ERROR(pmic_write_reg
+ (REG_ADC_4, reg_value, PMIC_ALL_BITS));
+ } else {
+ CHECK_ERROR(pmic_write_reg
+ (REG_ADC_2, reg_value, PMIC_ALL_BITS));
+ }
+
+ mc13783_adc_release(monitor_adc);
+ monitor_en = false;
+ return PMIC_SUCCESS;
+}
+
+/*!
+ * This function implements IOCTL controls on a MC13783 ADC device.
+ *
+ * @param inode pointer on the node
+ * @param file pointer on the file
+ * @param cmd the command
+ * @param arg the parameter
+ * @return This function returns 0 if successful.
+ */
+static int pmic_adc_ioctl(struct inode *inode, struct file *file,
+ unsigned int cmd, unsigned long arg)
+{
+ t_adc_convert_param *convert_param;
+ t_touch_mode touch_mode;
+ t_touch_screen touch_sample;
+ unsigned short b_current;
+ t_adc_comp_param *comp_param;
+ if ((_IOC_TYPE(cmd) != 'p') && (_IOC_TYPE(cmd) != 'D'))
+ return -ENOTTY;
+
+ while (suspend_flag == 1) {
+ swait++;
+ /* Block if the device is suspended */
+ if (wait_event_interruptible(suspendq, (suspend_flag == 0))) {
+ return -ERESTARTSYS;
+ }
+ }
+
+ convert_param = kmalloc(sizeof(t_adc_convert_param), GFP_KERNEL);
+ comp_param = kmalloc(sizeof(t_adc_comp_param), GFP_KERNEL);
+ switch (cmd) {
+ case PMIC_ADC_INIT:
+ pr_debug("init adc\n");
+ CHECK_ERROR(pmic_adc_init());
+ break;
+
+ case PMIC_ADC_DEINIT:
+ pr_debug("deinit adc\n");
+ CHECK_ERROR(pmic_adc_deinit());
+ break;
+
+ case PMIC_ADC_CONVERT:
+ if (convert_param == NULL)
+ return -ENOMEM;
+
+ if (copy_from_user(convert_param, (t_adc_convert_param *) arg,
+ sizeof(t_adc_convert_param))) {
+ kfree(convert_param);
+ return -EFAULT;
+ }
+ CHECK_ERROR_KFREE(pmic_adc_convert(convert_param->channel,
+ convert_param->result),
+ (kfree(convert_param)));
+
+ if (copy_to_user((t_adc_convert_param *) arg, convert_param,
+ sizeof(t_adc_convert_param))) {
+ kfree(convert_param);
+ return -EFAULT;
+ }
+ kfree(convert_param);
+ break;
+
+ case PMIC_ADC_CONVERT_8X:
+ if (convert_param == NULL)
+ return -ENOMEM;
+
+ if (copy_from_user(convert_param, (t_adc_convert_param *) arg,
+ sizeof(t_adc_convert_param))) {
+ kfree(convert_param);
+ return -EFAULT;
+ }
+ CHECK_ERROR_KFREE(pmic_adc_convert_8x(convert_param->channel,
+ convert_param->result),
+ (kfree(convert_param)));
+
+ if (copy_to_user((t_adc_convert_param *) arg, convert_param,
+ sizeof(t_adc_convert_param))) {
+ kfree(convert_param);
+ return -EFAULT;
+ }
+ kfree(convert_param);
+ break;
+
+ case PMIC_ADC_CONVERT_MULTICHANNEL:
+ if (convert_param == NULL)
+ return -ENOMEM;
+
+ if (copy_from_user(convert_param, (t_adc_convert_param *) arg,
+ sizeof(t_adc_convert_param))) {
+ kfree(convert_param);
+ return -EFAULT;
+ }
+
+ CHECK_ERROR_KFREE(pmic_adc_convert_multichnnel
+ (convert_param->channel,
+ convert_param->result),
+ (kfree(convert_param)));
+
+ if (copy_to_user((t_adc_convert_param *) arg, convert_param,
+ sizeof(t_adc_convert_param))) {
+ kfree(convert_param);
+ return -EFAULT;
+ }
+ kfree(convert_param);
+ break;
+
+ case PMIC_ADC_SET_TOUCH_MODE:
+ CHECK_ERROR(pmic_adc_set_touch_mode((t_touch_mode) arg));
+ break;
+
+ case PMIC_ADC_GET_TOUCH_MODE:
+ CHECK_ERROR(pmic_adc_get_touch_mode(&touch_mode));
+ if (copy_to_user((t_touch_mode *) arg, &touch_mode,
+ sizeof(t_touch_mode))) {
+ return -EFAULT;
+ }
+ break;
+
+ case PMIC_ADC_GET_TOUCH_SAMPLE:
+ pr_debug("pmic_adc_ioctl: " "PMIC_ADC_GET_TOUCH_SAMPLE\n");
+ CHECK_ERROR(pmic_adc_get_touch_sample(&touch_sample, 1));
+ if (copy_to_user((t_touch_screen *) arg, &touch_sample,
+ sizeof(t_touch_screen))) {
+ return -EFAULT;
+ }
+ break;
+
+ case PMIC_ADC_GET_BATTERY_CURRENT:
+ CHECK_ERROR(pmic_adc_get_battery_current(ADC_8CHAN_1X,
+ &b_current));
+ if (copy_to_user((unsigned short *)arg, &b_current,
+ sizeof(unsigned short))) {
+
+ return -EFAULT;
+ }
+ break;
+
+ case PMIC_ADC_ACTIVATE_COMPARATOR:
+ if (comp_param == NULL)
+ return -ENOMEM;
+
+ if (copy_from_user(comp_param, (t_adc_comp_param *) arg,
+ sizeof(t_adc_comp_param))) {
+ kfree(comp_param);
+ return -EFAULT;
+ }
+ CHECK_ERROR_KFREE(pmic_adc_active_comparator(comp_param->wlow,
+ comp_param->whigh,
+ comp_param->
+ channel,
+ comp_param->
+ callback),
+ (kfree(comp_param)));
+ break;
+
+ case PMIC_ADC_DEACTIVE_COMPARATOR:
+ CHECK_ERROR(pmic_adc_deactive_comparator());
+ break;
+
+ default:
+ pr_debug("pmic_adc_ioctl: unsupported ioctl command 0x%x\n",
+ cmd);
+ return -EINVAL;
+ }
+ return 0;
+}
+
+static struct file_operations mc13783_adc_fops = {
+ .owner = THIS_MODULE,
+ .ioctl = pmic_adc_ioctl,
+ .open = pmic_adc_open,
+ .release = pmic_adc_free,
+};
+
+static int pmic_adc_module_probe(struct platform_device *pdev)
+{
+ int ret = 0;
+ struct device *temp_class;
+
+ pmic_adc_major = register_chrdev(0, "pmic_adc", &mc13783_adc_fops);
+
+ if (pmic_adc_major < 0) {
+ pr_debug(KERN_ERR "Unable to get a major for pmic_adc\n");
+ return pmic_adc_major;
+ }
+ init_waitqueue_head(&suspendq);
+
+ pmic_adc_class = class_create(THIS_MODULE, "pmic_adc");
+ if (IS_ERR(pmic_adc_class)) {
+ pr_debug(KERN_ERR "Error creating pmic_adc class.\n");
+ ret = PTR_ERR(pmic_adc_class);
+ goto err_out1;
+ }
+
+ temp_class = device_create(pmic_adc_class, NULL,
+ MKDEV(pmic_adc_major, 0), NULL, "pmic_adc");
+ if (IS_ERR(temp_class)) {
+ pr_debug(KERN_ERR "Error creating pmic_adc class device.\n");
+ ret = PTR_ERR(temp_class);
+ goto err_out2;
+ }
+
+ ret = pmic_adc_init();
+ if (ret != PMIC_SUCCESS) {
+ pr_debug(KERN_ERR "Error in pmic_adc_init.\n");
+ goto err_out4;
+ }
+
+ pmic_adc_ready = 1;
+ pr_debug(KERN_INFO "PMIC ADC successfully probed\n");
+ return ret;
+
+ err_out4:
+ device_destroy(pmic_adc_class, MKDEV(pmic_adc_major, 0));
+ err_out2:
+ class_destroy(pmic_adc_class);
+ err_out1:
+ unregister_chrdev(pmic_adc_major, "pmic_adc");
+ return ret;
+}
+
+static int pmic_adc_module_remove(struct platform_device *pdev)
+{
+ pmic_adc_ready = 0;
+ pmic_adc_deinit();
+ device_destroy(pmic_adc_class, MKDEV(pmic_adc_major, 0));
+ class_destroy(pmic_adc_class);
+ unregister_chrdev(pmic_adc_major, "pmic_adc");
+ pr_debug(KERN_INFO "PMIC ADC successfully removed\n");
+ return 0;
+}
+
+static struct platform_driver pmic_adc_driver_ldm = {
+ .driver = {
+ .name = "pmic_adc",
+ },
+ .suspend = pmic_adc_suspend,
+ .resume = pmic_adc_resume,
+ .probe = pmic_adc_module_probe,
+ .remove = pmic_adc_module_remove,
+};
+
+/*
+ * Initialization and Exit
+ */
+static int __init pmic_adc_module_init(void)
+{
+ pr_debug("PMIC ADC driver loading...\n");
+ return platform_driver_register(&pmic_adc_driver_ldm);
+}
+
+static void __exit pmic_adc_module_exit(void)
+{
+ platform_driver_unregister(&pmic_adc_driver_ldm);
+ pr_debug("PMIC ADC driver successfully unloaded\n");
+}
+
+/*
+ * Module entry points
+ */
+
+module_init(pmic_adc_module_init);
+module_exit(pmic_adc_module_exit);
+
+MODULE_DESCRIPTION("PMIC ADC device driver");
+MODULE_AUTHOR("Freescale Semiconductor, Inc.");
+MODULE_LICENSE("GPL");
generated by cgit v1.2.3 (git 2.0.4) at 2024-04-19 22:55:51 +0000