| /* |
| * Copyright (c) 2009, Google Inc. |
| * All rights reserved. |
| * |
| * Copyright (c) 2009, Code Aurora Forum. All rights reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions |
| * are met: |
| * * Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * * Redistributions in binary form must reproduce the above copyright |
| * notice, this list of conditions and the following disclaimer in |
| * the documentation and/or other materials provided with the |
| * distribution. |
| * * Neither the name of Google, Inc. nor the names of its contributors |
| * may be used to endorse or promote products derived from this |
| * software without specific prior written permission. |
| * |
| * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
| * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS |
| * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE |
| * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, |
| * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, |
| * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS |
| * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED |
| * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, |
| * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT |
| * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
| * SUCH DAMAGE. |
| */ |
| |
| #include <assert.h> |
| #include <bits.h> |
| #include <stdlib.h> |
| #include <string.h> |
| #include <dev/keys.h> |
| #include <dev/gpio.h> |
| #include <dev/gpio_keypad.h> |
| #include <kernel/event.h> |
| #include <kernel/timer.h> |
| #include <reg.h> |
| #include <platform/iomap.h> |
| |
| struct gpio_kp { |
| struct gpio_keypad_info *keypad_info; |
| struct timer timer; |
| event_t full_scan; |
| int current_output; |
| unsigned int some_keys_pressed:2; |
| unsigned long keys_pressed[0]; |
| }; |
| |
| struct gpio_qwerty_kp { |
| struct qwerty_keypad_info *keypad_info; |
| struct timer timer; |
| event_t full_scan; |
| int num_of_scans; |
| unsigned int some_keys_pressed:2; |
| unsigned long keys_pressed[0]; |
| }; |
| |
| static struct gpio_qwerty_kp *qwerty_keypad; |
| /* TODO: Support multiple keypads? */ |
| static struct gpio_kp *keypad; |
| |
| static void check_output(struct gpio_kp *kp, int out, int polarity) |
| { |
| struct gpio_keypad_info *kpinfo = kp->keypad_info; |
| int key_index; |
| int in; |
| int gpio; |
| int changed = 0; |
| |
| key_index = out * kpinfo->ninputs; |
| for (in = 0; in < kpinfo->ninputs; in++, key_index++) { |
| gpio = kpinfo->input_gpios[in]; |
| changed = 0; |
| if (gpio_get(gpio) ^ !polarity) { |
| if (kp->some_keys_pressed < 3) |
| kp->some_keys_pressed++; |
| changed = !bitmap_set(kp->keys_pressed, key_index); |
| } else { |
| changed = bitmap_clear(kp->keys_pressed, key_index); |
| } |
| if (changed) { |
| int state = bitmap_test(kp->keys_pressed, key_index); |
| keys_post_event(kpinfo->keymap[key_index], state); |
| } |
| } |
| |
| /* sets up the right state for the next poll cycle */ |
| gpio = kpinfo->output_gpios[out]; |
| if (kpinfo->flags & GPIOKPF_DRIVE_INACTIVE) |
| gpio_set(gpio, !polarity); |
| else |
| gpio_config(gpio, GPIO_INPUT); |
| } |
| |
| static enum handler_return |
| gpio_keypad_timer_func(struct timer *timer, time_t now, void *arg) |
| { |
| struct gpio_kp *kp = keypad; |
| struct gpio_keypad_info *kpinfo = kp->keypad_info; |
| int polarity = !!(kpinfo->flags & GPIOKPF_ACTIVE_HIGH); |
| int out; |
| int gpio; |
| |
| out = kp->current_output; |
| if (out == kpinfo->noutputs) { |
| out = 0; |
| kp->some_keys_pressed = 0; |
| } else { |
| check_output(kp, out, polarity); |
| out++; |
| } |
| |
| kp->current_output = out; |
| if (out < kpinfo->noutputs) { |
| gpio = kpinfo->output_gpios[out]; |
| if (kpinfo->flags & GPIOKPF_DRIVE_INACTIVE) |
| gpio_set(gpio, polarity); |
| else |
| gpio_config(gpio, polarity ? GPIO_OUTPUT : 0); |
| timer_set_oneshot(timer, kpinfo->settle_time, |
| gpio_keypad_timer_func, NULL); |
| goto done; |
| } |
| |
| if (/*!kp->use_irq*/ 1 || kp->some_keys_pressed) { |
| event_signal(&kp->full_scan, false); |
| timer_set_oneshot(timer, kpinfo->poll_time, |
| gpio_keypad_timer_func, NULL); |
| goto done; |
| } |
| |
| #if 0 |
| /* No keys are pressed, reenable interrupt */ |
| for (out = 0; out < kpinfo->noutputs; out++) { |
| if (gpio_keypad_flags & GPIOKPF_DRIVE_INACTIVE) |
| gpio_set(kpinfo->output_gpios[out], polarity); |
| else |
| gpio_config(kpinfo->output_gpios[out], polarity ? GPIO_OUTPUT : 0); |
| } |
| for (in = 0; in < kpinfo->ninputs; in++) |
| enable_irq(gpio_to_irq(kpinfo->input_gpios[in])); |
| return INT_RESCHEDULE; |
| #endif |
| |
| done: |
| return INT_RESCHEDULE; |
| } |
| |
| void gpio_keypad_init(struct gpio_keypad_info *kpinfo) |
| { |
| int key_count; |
| int output_val; |
| int output_cfg; |
| int i; |
| int len; |
| |
| ASSERT(kpinfo->keymap && kpinfo->input_gpios && kpinfo->output_gpios); |
| key_count = kpinfo->ninputs * kpinfo->noutputs; |
| |
| len = sizeof(struct gpio_kp) + (sizeof(unsigned long) * |
| BITMAP_NUM_WORDS(key_count)); |
| keypad = malloc(len); |
| ASSERT(keypad); |
| |
| memset(keypad, 0, len); |
| keypad->keypad_info = kpinfo; |
| |
| output_val = (!!(kpinfo->flags & GPIOKPF_ACTIVE_HIGH)) ^ |
| (!!(kpinfo->flags & GPIOKPF_DRIVE_INACTIVE)); |
| output_cfg = kpinfo->flags & GPIOKPF_DRIVE_INACTIVE ? GPIO_OUTPUT : 0; |
| for (i = 0; i < kpinfo->noutputs; i++) { |
| gpio_set(kpinfo->output_gpios[i], output_val); |
| gpio_config(kpinfo->output_gpios[i], output_cfg); |
| } |
| for (i = 0; i < kpinfo->ninputs; i++) |
| gpio_config(kpinfo->input_gpios[i], GPIO_INPUT); |
| |
| keypad->current_output = kpinfo->noutputs; |
| |
| event_init(&keypad->full_scan, false, EVENT_FLAG_AUTOUNSIGNAL); |
| timer_initialize(&keypad->timer); |
| timer_set_oneshot(&keypad->timer, 0, gpio_keypad_timer_func, NULL); |
| |
| /* wait for the keypad to complete one full scan */ |
| event_wait(&keypad->full_scan); |
| } |
| |
| int i2c_ssbi_poll_for_device_ready(void) |
| { |
| unsigned long timeout = SSBI_TIMEOUT_US; |
| |
| while (!(readl(MSM_SSBI_BASE + SSBI2_STATUS) & SSBI_STATUS_READY)) { |
| if (--timeout == 0) { |
| dprintf(INFO, "In Device ready function:Timeout, status %x\n", readl(MSM_SSBI_BASE + SSBI2_STATUS)); |
| return 1; |
| } |
| } |
| |
| return 0; |
| } |
| |
| int i2c_ssbi_poll_for_read_completed(void) |
| { |
| unsigned long timeout = SSBI_TIMEOUT_US; |
| |
| while (!(readl(MSM_SSBI_BASE + SSBI2_STATUS) & SSBI_STATUS_RD_READY)) { |
| if (--timeout == 0) { |
| dprintf(INFO, "In read completed function:Timeout, status %x\n", readl(MSM_SSBI_BASE + SSBI2_STATUS)); |
| return 1; |
| } |
| } |
| |
| return 0; |
| } |
| |
| int i2c_ssbi_read_bytes(unsigned char *buffer, unsigned short length, |
| unsigned short slave_addr) |
| { |
| int ret = 0; |
| unsigned char *buf = buffer; |
| unsigned short len = length; |
| unsigned short addr = slave_addr; |
| unsigned long read_cmd = SSBI_CMD_READ(addr); |
| unsigned long mode2 = readl(MSM_SSBI_BASE + SSBI2_MODE2); |
| |
| //buf = alloc(len * sizeof(8)); |
| if (mode2 & SSBI_MODE2_SSBI2_MODE) |
| writel(SSBI_MODE2_REG_ADDR_15_8(mode2, addr), |
| MSM_SSBI_BASE + SSBI2_MODE2); |
| |
| while (len) { |
| ret = i2c_ssbi_poll_for_device_ready(); |
| if (ret) { |
| dprintf (CRITICAL, "Error: device not ready\n"); |
| return ret; |
| } |
| |
| writel(read_cmd, MSM_SSBI_BASE + SSBI2_CMD); |
| |
| ret = i2c_ssbi_poll_for_read_completed(); |
| if (ret) { |
| dprintf (CRITICAL, "Error: read not completed\n"); |
| return ret; |
| } |
| |
| *buf++ = readl(MSM_SSBI_BASE + SSBI2_RD) & SSBI_RD_REG_DATA_MASK; |
| len--; |
| } |
| return 0; |
| } |
| |
| int i2c_ssbi_write_bytes(unsigned char *buffer, unsigned short length, |
| unsigned short slave_addr) |
| { |
| int ret = 0; |
| unsigned long timeout = SSBI_TIMEOUT_US; |
| unsigned char *buf = buffer; |
| unsigned short len = length; |
| unsigned short addr = slave_addr; |
| unsigned long mode2 = readl(MSM_SSBI_BASE + SSBI2_MODE2); |
| |
| if (mode2 & SSBI_MODE2_SSBI2_MODE) |
| writel(SSBI_MODE2_REG_ADDR_15_8(mode2, addr), |
| MSM_SSBI_BASE + SSBI2_MODE2); |
| |
| while (len) { |
| ret = i2c_ssbi_poll_for_device_ready(); |
| if (ret) { |
| dprintf (CRITICAL, "Error: device not ready\n"); |
| return ret; |
| } |
| |
| writel(SSBI_CMD_WRITE(addr, *buf++), MSM_SSBI_BASE + SSBI2_CMD); |
| |
| while (readl(MSM_SSBI_BASE + SSBI2_STATUS) & SSBI_STATUS_MCHN_BUSY) { |
| if (--timeout == 0) { |
| dprintf(INFO, "In Device ready function:Timeout, status %x\n", readl(MSM_SSBI_BASE + SSBI2_STATUS)); |
| return 1; |
| } |
| } |
| len--; |
| } |
| return 0; |
| } |
| |
| int pm8058_gpio_config(int gpio, struct pm8058_gpio *param) |
| { |
| int rc; |
| unsigned char bank[8]; |
| static int dir_map[] = { |
| PM8058_GPIO_MODE_OFF, |
| PM8058_GPIO_MODE_OUTPUT, |
| PM8058_GPIO_MODE_INPUT, |
| PM8058_GPIO_MODE_BOTH, |
| }; |
| |
| if (param == 0) { |
| dprintf (INFO, "pm8058_gpio struct not defined\n"); |
| return -1; |
| } |
| |
| /* Select banks and configure the gpio */ |
| bank[0] = PM8058_GPIO_WRITE | |
| ((param->vin_sel << PM8058_GPIO_VIN_SHIFT) & |
| PM8058_GPIO_VIN_MASK) | |
| PM8058_GPIO_MODE_ENABLE; |
| bank[1] = PM8058_GPIO_WRITE | |
| ((1 << PM8058_GPIO_BANK_SHIFT) & PM8058_GPIO_BANK_MASK) | |
| ((dir_map[param->direction] << PM8058_GPIO_MODE_SHIFT) & |
| PM8058_GPIO_MODE_MASK) | |
| ((param->direction & PM_GPIO_DIR_OUT) ? |
| PM8058_GPIO_OUT_BUFFER : 0); |
| bank[2] = PM8058_GPIO_WRITE | |
| ((2 << PM8058_GPIO_BANK_SHIFT) & PM8058_GPIO_BANK_MASK) | |
| ((param->pull << PM8058_GPIO_PULL_SHIFT) & |
| PM8058_GPIO_PULL_MASK); |
| bank[3] = PM8058_GPIO_WRITE | |
| ((3 << PM8058_GPIO_BANK_SHIFT) & PM8058_GPIO_BANK_MASK) | |
| ((param->out_strength << PM8058_GPIO_OUT_STRENGTH_SHIFT) & |
| PM8058_GPIO_OUT_STRENGTH_MASK); |
| bank[4] = PM8058_GPIO_WRITE | |
| ((4 << PM8058_GPIO_BANK_SHIFT) & PM8058_GPIO_BANK_MASK) | |
| ((param->function << PM8058_GPIO_FUNC_SHIFT) & |
| PM8058_GPIO_FUNC_MASK); |
| |
| rc = i2c_ssbi_write_bytes(bank, 5, SSBI_REG_ADDR_GPIO(gpio)); |
| if (rc) { |
| dprintf(INFO, "Failed on 1st ssbi_write(): rc=%d.\n", rc); |
| return 1; |
| } |
| return 0; |
| } |
| |
| int pm8058_gpio_config_kypd_drv(int gpio_start, int num_gpios) |
| { |
| int rc; |
| struct pm8058_gpio kypd_drv = { |
| .direction = PM_GPIO_DIR_OUT, |
| .pull = PM_GPIO_PULL_NO, |
| .vin_sel = 2, |
| .out_strength = PM_GPIO_STRENGTH_LOW, |
| .function = PM_GPIO_FUNC_1, |
| .inv_int_pol = 1, |
| }; |
| |
| while (num_gpios--) { |
| rc = pm8058_gpio_config(gpio_start++, &kypd_drv); |
| if (rc) { |
| dprintf(INFO, "FAIL pm8058_gpio_config(): rc=%d.\n", rc); |
| return rc; |
| } |
| } |
| |
| return 0; |
| } |
| |
| int pm8058_gpio_config_kypd_sns(int gpio_start, int num_gpios) |
| { |
| int rc; |
| struct pm8058_gpio kypd_sns = { |
| .direction = PM_GPIO_DIR_IN, |
| .pull = PM_GPIO_PULL_UP1, |
| .vin_sel = 2, |
| .out_strength = PM_GPIO_STRENGTH_NO, |
| .function = PM_GPIO_FUNC_NORMAL, |
| .inv_int_pol = 1, |
| }; |
| |
| while (num_gpios--) { |
| rc = pm8058_gpio_config(gpio_start++, &kypd_sns); |
| if (rc) { |
| dprintf(INFO, "FAIL pm8058_gpio_config(): rc=%d.\n", rc); |
| return rc; |
| } |
| } |
| |
| return 0; |
| } |
| |
| static enum handler_return |
| scan_qwerty_keypad(struct timer *timer, time_t now, void *arg) |
| { |
| int rows = (qwerty_keypad->keypad_info)->rows; |
| int columns = NUM_OF_KYPD_SNS_GPIOS; |
| unsigned char column_keys = 0x00; |
| int shift = 0; |
| static int key_detected = 0; |
| |
| if (i2c_ssbi_read_bytes((qwerty_keypad->keypad_info)->rec_keys, NUM_OF_SSBI_READS, |
| SSBI_REG_KYPD_REC_DATA_ADDR)) |
| dprintf (CRITICAL, "Error in initializing SSBI_REG_KYPD_CNTL register\n"); |
| |
| if (i2c_ssbi_read_bytes((qwerty_keypad->keypad_info)->old_keys, NUM_OF_SSBI_READS, |
| SSBI_REG_KYPD_OLD_DATA_ADDR)) |
| dprintf (CRITICAL, "Error in initializing SSBI_REG_KYPD_CNTL register\n"); |
| |
| while (rows--) { |
| if ((qwerty_keypad->keypad_info)->rec_keys[rows] |
| != (qwerty_keypad->keypad_info)->old_keys[rows]) { |
| while (columns--) { |
| column_keys = ((qwerty_keypad->keypad_info)->rec_keys[rows]); |
| if ((0x01 << columns) & (~column_keys)) { |
| shift = (rows * (qwerty_keypad->keypad_info)->columns) + columns; |
| if ((qwerty_keypad->keypad_info)->keymap[shift]) { |
| if (shift != key_detected) { |
| // key_changed((qwerty_keypad->keypad_info)->keymap[shift], 1); |
| key_detected = shift; |
| keys_post_event((qwerty_keypad->keypad_info)->keymap[shift], 1); |
| event_signal(&qwerty_keypad->full_scan, false); |
| timer_set_oneshot(timer, (qwerty_keypad->keypad_info)->poll_time, |
| scan_qwerty_keypad, NULL); |
| return INT_RESCHEDULE; |
| |
| } |
| } |
| } |
| } |
| } |
| } |
| if (qwerty_keypad->num_of_scans < 10) |
| { |
| (qwerty_keypad->num_of_scans)++; |
| timer_set_oneshot(timer, (qwerty_keypad->keypad_info)->settle_time, |
| scan_qwerty_keypad, NULL); |
| return INT_RESCHEDULE; |
| } |
| |
| event_signal(&qwerty_keypad->full_scan, false); |
| return INT_RESCHEDULE; |
| |
| } |
| |
| void ssbi_gpio_init(void) |
| { |
| unsigned char kypd_cntl_init = 0x84; |
| unsigned char kypd_scan_init = 0x20; |
| |
| if (i2c_ssbi_write_bytes(&kypd_cntl_init, 1, SSBI_REG_KYPD_CNTL_ADDR)) |
| dprintf (CRITICAL, "Error in initializing SSBI_REG_KYPD_CNTL register\n"); |
| |
| if (i2c_ssbi_write_bytes(&kypd_scan_init, 1, SSBI_REG_KYPD_SCAN_ADDR)) |
| dprintf (CRITICAL, "Error in initializing SSBI_REG_KYPD_SCAN register\n"); |
| |
| pm8058_gpio_config_kypd_sns(SSBI_OFFSET_ADDR_GPIO_KYPD_SNS, NUM_OF_KYPD_SNS_GPIOS); |
| pm8058_gpio_config_kypd_drv(SSBI_OFFSET_ADDR_GPIO_KYPD_DRV, NUM_OF_KYPD_DRV_GPIOS); |
| |
| |
| } |
| |
| void ssbi_keypad_init(struct qwerty_keypad_info *qwerty_kp) |
| { |
| int *modem_stat_check = (MSM_SHARED_BASE + 0x14); |
| int len; |
| |
| /* Wait for modem to be ready before keypad init */ |
| while (readl(modem_stat_check) != 1); |
| |
| ssbi_gpio_init(); |
| |
| len = sizeof(struct gpio_qwerty_kp); |
| qwerty_keypad = malloc(len); |
| ASSERT(qwerty_keypad); |
| |
| memset(qwerty_keypad, 0, len); |
| qwerty_keypad->keypad_info = qwerty_kp; |
| qwerty_keypad->num_of_scans = 0; |
| |
| event_init(&qwerty_keypad->full_scan, false, EVENT_FLAG_AUTOUNSIGNAL); |
| timer_initialize(&qwerty_keypad->timer); |
| timer_set_oneshot(&qwerty_keypad->timer, 0, scan_qwerty_keypad, NULL); |
| |
| /* wait for the keypad to complete one full scan */ |
| event_wait(&qwerty_keypad->full_scan); |
| } |
| |