1286 lines
30 KiB
C
1286 lines
30 KiB
C
/*
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* Copyright (C) 2004 Texas Instruments, Inc.
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*
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* Some parts based tps65010.c:
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* Copyright (C) 2004 Texas Instruments and
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* Copyright (C) 2004-2005 David Brownell
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*
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* Some parts based on tlv320aic24.c:
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* Copyright (C) by Kai Svahn <kai.svahn@nokia.com>
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*
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* Changes for interrupt handling and clean-up by
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* Tony Lindgren <tony@atomide.com> and Imre Deak <imre.deak@nokia.com>
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* Cleanup and generalized support for voltage setting by
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* Juha Yrjola
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* Added support for controlling VCORE and regulator sleep states,
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* Amit Kucheria <amit.kucheria@nokia.com>
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* Copyright (C) 2005, 2006 Nokia Corporation
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#include <linux/module.h>
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#include <linux/i2c.h>
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#include <linux/interrupt.h>
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#include <linux/sched.h>
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#include <linux/mutex.h>
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#include <linux/workqueue.h>
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#include <linux/delay.h>
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#include <linux/rtc.h>
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#include <linux/bcd.h>
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#include <linux/slab.h>
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#include <asm/mach/irq.h>
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#include <mach/gpio.h>
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#include <plat/menelaus.h>
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#define DRIVER_NAME "menelaus"
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#define MENELAUS_I2C_ADDRESS 0x72
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#define MENELAUS_REV 0x01
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#define MENELAUS_VCORE_CTRL1 0x02
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#define MENELAUS_VCORE_CTRL2 0x03
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#define MENELAUS_VCORE_CTRL3 0x04
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#define MENELAUS_VCORE_CTRL4 0x05
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#define MENELAUS_VCORE_CTRL5 0x06
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#define MENELAUS_DCDC_CTRL1 0x07
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#define MENELAUS_DCDC_CTRL2 0x08
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#define MENELAUS_DCDC_CTRL3 0x09
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#define MENELAUS_LDO_CTRL1 0x0A
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#define MENELAUS_LDO_CTRL2 0x0B
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#define MENELAUS_LDO_CTRL3 0x0C
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#define MENELAUS_LDO_CTRL4 0x0D
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#define MENELAUS_LDO_CTRL5 0x0E
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#define MENELAUS_LDO_CTRL6 0x0F
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#define MENELAUS_LDO_CTRL7 0x10
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#define MENELAUS_LDO_CTRL8 0x11
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#define MENELAUS_SLEEP_CTRL1 0x12
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#define MENELAUS_SLEEP_CTRL2 0x13
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#define MENELAUS_DEVICE_OFF 0x14
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#define MENELAUS_OSC_CTRL 0x15
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#define MENELAUS_DETECT_CTRL 0x16
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#define MENELAUS_INT_MASK1 0x17
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#define MENELAUS_INT_MASK2 0x18
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#define MENELAUS_INT_STATUS1 0x19
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#define MENELAUS_INT_STATUS2 0x1A
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#define MENELAUS_INT_ACK1 0x1B
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#define MENELAUS_INT_ACK2 0x1C
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#define MENELAUS_GPIO_CTRL 0x1D
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#define MENELAUS_GPIO_IN 0x1E
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#define MENELAUS_GPIO_OUT 0x1F
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#define MENELAUS_BBSMS 0x20
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#define MENELAUS_RTC_CTRL 0x21
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#define MENELAUS_RTC_UPDATE 0x22
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#define MENELAUS_RTC_SEC 0x23
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#define MENELAUS_RTC_MIN 0x24
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#define MENELAUS_RTC_HR 0x25
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#define MENELAUS_RTC_DAY 0x26
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#define MENELAUS_RTC_MON 0x27
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#define MENELAUS_RTC_YR 0x28
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#define MENELAUS_RTC_WKDAY 0x29
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#define MENELAUS_RTC_AL_SEC 0x2A
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#define MENELAUS_RTC_AL_MIN 0x2B
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#define MENELAUS_RTC_AL_HR 0x2C
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#define MENELAUS_RTC_AL_DAY 0x2D
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#define MENELAUS_RTC_AL_MON 0x2E
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#define MENELAUS_RTC_AL_YR 0x2F
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#define MENELAUS_RTC_COMP_MSB 0x30
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#define MENELAUS_RTC_COMP_LSB 0x31
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#define MENELAUS_S1_PULL_EN 0x32
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#define MENELAUS_S1_PULL_DIR 0x33
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#define MENELAUS_S2_PULL_EN 0x34
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#define MENELAUS_S2_PULL_DIR 0x35
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#define MENELAUS_MCT_CTRL1 0x36
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#define MENELAUS_MCT_CTRL2 0x37
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#define MENELAUS_MCT_CTRL3 0x38
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#define MENELAUS_MCT_PIN_ST 0x39
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#define MENELAUS_DEBOUNCE1 0x3A
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#define IH_MENELAUS_IRQS 12
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#define MENELAUS_MMC_S1CD_IRQ 0 /* MMC slot 1 card change */
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#define MENELAUS_MMC_S2CD_IRQ 1 /* MMC slot 2 card change */
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#define MENELAUS_MMC_S1D1_IRQ 2 /* MMC DAT1 low in slot 1 */
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#define MENELAUS_MMC_S2D1_IRQ 3 /* MMC DAT1 low in slot 2 */
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#define MENELAUS_LOWBAT_IRQ 4 /* Low battery */
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#define MENELAUS_HOTDIE_IRQ 5 /* Hot die detect */
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#define MENELAUS_UVLO_IRQ 6 /* UVLO detect */
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#define MENELAUS_TSHUT_IRQ 7 /* Thermal shutdown */
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#define MENELAUS_RTCTMR_IRQ 8 /* RTC timer */
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#define MENELAUS_RTCALM_IRQ 9 /* RTC alarm */
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#define MENELAUS_RTCERR_IRQ 10 /* RTC error */
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#define MENELAUS_PSHBTN_IRQ 11 /* Push button */
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#define MENELAUS_RESERVED12_IRQ 12 /* Reserved */
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#define MENELAUS_RESERVED13_IRQ 13 /* Reserved */
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#define MENELAUS_RESERVED14_IRQ 14 /* Reserved */
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#define MENELAUS_RESERVED15_IRQ 15 /* Reserved */
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static void menelaus_work(struct work_struct *_menelaus);
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struct menelaus_chip {
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struct mutex lock;
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struct i2c_client *client;
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struct work_struct work;
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#ifdef CONFIG_RTC_DRV_TWL92330
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struct rtc_device *rtc;
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u8 rtc_control;
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unsigned uie:1;
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#endif
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unsigned vcore_hw_mode:1;
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u8 mask1, mask2;
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void (*handlers[16])(struct menelaus_chip *);
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void (*mmc_callback)(void *data, u8 mask);
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void *mmc_callback_data;
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};
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static struct menelaus_chip *the_menelaus;
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static int menelaus_write_reg(int reg, u8 value)
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{
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int val = i2c_smbus_write_byte_data(the_menelaus->client, reg, value);
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if (val < 0) {
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pr_err(DRIVER_NAME ": write error");
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return val;
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}
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return 0;
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}
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static int menelaus_read_reg(int reg)
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{
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int val = i2c_smbus_read_byte_data(the_menelaus->client, reg);
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if (val < 0)
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pr_err(DRIVER_NAME ": read error");
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return val;
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}
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static int menelaus_enable_irq(int irq)
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{
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if (irq > 7) {
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irq -= 8;
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the_menelaus->mask2 &= ~(1 << irq);
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return menelaus_write_reg(MENELAUS_INT_MASK2,
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the_menelaus->mask2);
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} else {
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the_menelaus->mask1 &= ~(1 << irq);
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return menelaus_write_reg(MENELAUS_INT_MASK1,
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the_menelaus->mask1);
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}
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}
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static int menelaus_disable_irq(int irq)
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{
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if (irq > 7) {
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irq -= 8;
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the_menelaus->mask2 |= (1 << irq);
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return menelaus_write_reg(MENELAUS_INT_MASK2,
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the_menelaus->mask2);
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} else {
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the_menelaus->mask1 |= (1 << irq);
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return menelaus_write_reg(MENELAUS_INT_MASK1,
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the_menelaus->mask1);
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}
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}
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static int menelaus_ack_irq(int irq)
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{
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if (irq > 7)
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return menelaus_write_reg(MENELAUS_INT_ACK2, 1 << (irq - 8));
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else
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return menelaus_write_reg(MENELAUS_INT_ACK1, 1 << irq);
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}
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/* Adds a handler for an interrupt. Does not run in interrupt context */
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static int menelaus_add_irq_work(int irq,
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void (*handler)(struct menelaus_chip *))
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{
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int ret = 0;
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mutex_lock(&the_menelaus->lock);
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the_menelaus->handlers[irq] = handler;
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ret = menelaus_enable_irq(irq);
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mutex_unlock(&the_menelaus->lock);
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return ret;
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}
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/* Removes handler for an interrupt */
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static int menelaus_remove_irq_work(int irq)
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{
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int ret = 0;
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mutex_lock(&the_menelaus->lock);
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ret = menelaus_disable_irq(irq);
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the_menelaus->handlers[irq] = NULL;
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mutex_unlock(&the_menelaus->lock);
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return ret;
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}
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/*
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* Gets scheduled when a card detect interrupt happens. Note that in some cases
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* this line is wired to card cover switch rather than the card detect switch
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* in each slot. In this case the cards are not seen by menelaus.
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* FIXME: Add handling for D1 too
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*/
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static void menelaus_mmc_cd_work(struct menelaus_chip *menelaus_hw)
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{
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int reg;
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unsigned char card_mask = 0;
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reg = menelaus_read_reg(MENELAUS_MCT_PIN_ST);
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if (reg < 0)
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return;
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if (!(reg & 0x1))
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card_mask |= (1 << 0);
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if (!(reg & 0x2))
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card_mask |= (1 << 1);
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if (menelaus_hw->mmc_callback)
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menelaus_hw->mmc_callback(menelaus_hw->mmc_callback_data,
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card_mask);
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}
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/*
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* Toggles the MMC slots between open-drain and push-pull mode.
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*/
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int menelaus_set_mmc_opendrain(int slot, int enable)
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{
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int ret, val;
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if (slot != 1 && slot != 2)
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return -EINVAL;
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mutex_lock(&the_menelaus->lock);
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ret = menelaus_read_reg(MENELAUS_MCT_CTRL1);
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if (ret < 0) {
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mutex_unlock(&the_menelaus->lock);
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return ret;
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}
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val = ret;
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if (slot == 1) {
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if (enable)
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val |= 1 << 2;
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else
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val &= ~(1 << 2);
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} else {
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if (enable)
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val |= 1 << 3;
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else
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val &= ~(1 << 3);
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}
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ret = menelaus_write_reg(MENELAUS_MCT_CTRL1, val);
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mutex_unlock(&the_menelaus->lock);
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return ret;
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}
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EXPORT_SYMBOL(menelaus_set_mmc_opendrain);
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int menelaus_set_slot_sel(int enable)
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{
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int ret;
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mutex_lock(&the_menelaus->lock);
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ret = menelaus_read_reg(MENELAUS_GPIO_CTRL);
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if (ret < 0)
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goto out;
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ret |= 0x02;
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if (enable)
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ret |= 1 << 5;
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else
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ret &= ~(1 << 5);
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ret = menelaus_write_reg(MENELAUS_GPIO_CTRL, ret);
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out:
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mutex_unlock(&the_menelaus->lock);
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return ret;
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}
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EXPORT_SYMBOL(menelaus_set_slot_sel);
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int menelaus_set_mmc_slot(int slot, int enable, int power, int cd_en)
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{
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int ret, val;
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if (slot != 1 && slot != 2)
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return -EINVAL;
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if (power >= 3)
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return -EINVAL;
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mutex_lock(&the_menelaus->lock);
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ret = menelaus_read_reg(MENELAUS_MCT_CTRL2);
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if (ret < 0)
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goto out;
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val = ret;
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if (slot == 1) {
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if (cd_en)
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val |= (1 << 4) | (1 << 6);
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else
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val &= ~((1 << 4) | (1 << 6));
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} else {
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if (cd_en)
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val |= (1 << 5) | (1 << 7);
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else
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val &= ~((1 << 5) | (1 << 7));
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}
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ret = menelaus_write_reg(MENELAUS_MCT_CTRL2, val);
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if (ret < 0)
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goto out;
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ret = menelaus_read_reg(MENELAUS_MCT_CTRL3);
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if (ret < 0)
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goto out;
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val = ret;
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if (slot == 1) {
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if (enable)
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val |= 1 << 0;
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else
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val &= ~(1 << 0);
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} else {
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int b;
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if (enable)
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ret |= 1 << 1;
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else
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ret &= ~(1 << 1);
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b = menelaus_read_reg(MENELAUS_MCT_CTRL2);
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b &= ~0x03;
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b |= power;
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ret = menelaus_write_reg(MENELAUS_MCT_CTRL2, b);
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if (ret < 0)
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goto out;
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}
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/* Disable autonomous shutdown */
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val &= ~(0x03 << 2);
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ret = menelaus_write_reg(MENELAUS_MCT_CTRL3, val);
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out:
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mutex_unlock(&the_menelaus->lock);
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return ret;
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}
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EXPORT_SYMBOL(menelaus_set_mmc_slot);
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int menelaus_register_mmc_callback(void (*callback)(void *data, u8 card_mask),
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void *data)
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{
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int ret = 0;
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the_menelaus->mmc_callback_data = data;
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the_menelaus->mmc_callback = callback;
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ret = menelaus_add_irq_work(MENELAUS_MMC_S1CD_IRQ,
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menelaus_mmc_cd_work);
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if (ret < 0)
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return ret;
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ret = menelaus_add_irq_work(MENELAUS_MMC_S2CD_IRQ,
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menelaus_mmc_cd_work);
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if (ret < 0)
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return ret;
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ret = menelaus_add_irq_work(MENELAUS_MMC_S1D1_IRQ,
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menelaus_mmc_cd_work);
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if (ret < 0)
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return ret;
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ret = menelaus_add_irq_work(MENELAUS_MMC_S2D1_IRQ,
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menelaus_mmc_cd_work);
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return ret;
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}
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EXPORT_SYMBOL(menelaus_register_mmc_callback);
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void menelaus_unregister_mmc_callback(void)
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{
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menelaus_remove_irq_work(MENELAUS_MMC_S1CD_IRQ);
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menelaus_remove_irq_work(MENELAUS_MMC_S2CD_IRQ);
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menelaus_remove_irq_work(MENELAUS_MMC_S1D1_IRQ);
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menelaus_remove_irq_work(MENELAUS_MMC_S2D1_IRQ);
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the_menelaus->mmc_callback = NULL;
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the_menelaus->mmc_callback_data = 0;
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}
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EXPORT_SYMBOL(menelaus_unregister_mmc_callback);
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struct menelaus_vtg {
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const char *name;
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u8 vtg_reg;
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u8 vtg_shift;
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u8 vtg_bits;
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u8 mode_reg;
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};
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struct menelaus_vtg_value {
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u16 vtg;
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u16 val;
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};
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static int menelaus_set_voltage(const struct menelaus_vtg *vtg, int mV,
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int vtg_val, int mode)
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{
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int val, ret;
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struct i2c_client *c = the_menelaus->client;
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mutex_lock(&the_menelaus->lock);
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if (vtg == 0)
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goto set_voltage;
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ret = menelaus_read_reg(vtg->vtg_reg);
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if (ret < 0)
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goto out;
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val = ret & ~(((1 << vtg->vtg_bits) - 1) << vtg->vtg_shift);
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val |= vtg_val << vtg->vtg_shift;
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dev_dbg(&c->dev, "Setting voltage '%s'"
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"to %d mV (reg 0x%02x, val 0x%02x)\n",
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vtg->name, mV, vtg->vtg_reg, val);
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ret = menelaus_write_reg(vtg->vtg_reg, val);
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if (ret < 0)
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goto out;
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set_voltage:
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ret = menelaus_write_reg(vtg->mode_reg, mode);
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out:
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mutex_unlock(&the_menelaus->lock);
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if (ret == 0) {
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/* Wait for voltage to stabilize */
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msleep(1);
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}
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return ret;
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}
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static int menelaus_get_vtg_value(int vtg, const struct menelaus_vtg_value *tbl,
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int n)
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{
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int i;
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for (i = 0; i < n; i++, tbl++)
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if (tbl->vtg == vtg)
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return tbl->val;
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return -EINVAL;
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}
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/*
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* Vcore can be programmed in two ways:
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* SW-controlled: Required voltage is programmed into VCORE_CTRL1
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* HW-controlled: Required range (roof-floor) is programmed into VCORE_CTRL3
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* and VCORE_CTRL4
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*
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* Call correct 'set' function accordingly
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*/
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|
|
static const struct menelaus_vtg_value vcore_values[] = {
|
|
{ 1000, 0 },
|
|
{ 1025, 1 },
|
|
{ 1050, 2 },
|
|
{ 1075, 3 },
|
|
{ 1100, 4 },
|
|
{ 1125, 5 },
|
|
{ 1150, 6 },
|
|
{ 1175, 7 },
|
|
{ 1200, 8 },
|
|
{ 1225, 9 },
|
|
{ 1250, 10 },
|
|
{ 1275, 11 },
|
|
{ 1300, 12 },
|
|
{ 1325, 13 },
|
|
{ 1350, 14 },
|
|
{ 1375, 15 },
|
|
{ 1400, 16 },
|
|
{ 1425, 17 },
|
|
{ 1450, 18 },
|
|
};
|
|
|
|
int menelaus_set_vcore_sw(unsigned int mV)
|
|
{
|
|
int val, ret;
|
|
struct i2c_client *c = the_menelaus->client;
|
|
|
|
val = menelaus_get_vtg_value(mV, vcore_values,
|
|
ARRAY_SIZE(vcore_values));
|
|
if (val < 0)
|
|
return -EINVAL;
|
|
|
|
dev_dbg(&c->dev, "Setting VCORE to %d mV (val 0x%02x)\n", mV, val);
|
|
|
|
/* Set SW mode and the voltage in one go. */
|
|
mutex_lock(&the_menelaus->lock);
|
|
ret = menelaus_write_reg(MENELAUS_VCORE_CTRL1, val);
|
|
if (ret == 0)
|
|
the_menelaus->vcore_hw_mode = 0;
|
|
mutex_unlock(&the_menelaus->lock);
|
|
msleep(1);
|
|
|
|
return ret;
|
|
}
|
|
|
|
int menelaus_set_vcore_hw(unsigned int roof_mV, unsigned int floor_mV)
|
|
{
|
|
int fval, rval, val, ret;
|
|
struct i2c_client *c = the_menelaus->client;
|
|
|
|
rval = menelaus_get_vtg_value(roof_mV, vcore_values,
|
|
ARRAY_SIZE(vcore_values));
|
|
if (rval < 0)
|
|
return -EINVAL;
|
|
fval = menelaus_get_vtg_value(floor_mV, vcore_values,
|
|
ARRAY_SIZE(vcore_values));
|
|
if (fval < 0)
|
|
return -EINVAL;
|
|
|
|
dev_dbg(&c->dev, "Setting VCORE FLOOR to %d mV and ROOF to %d mV\n",
|
|
floor_mV, roof_mV);
|
|
|
|
mutex_lock(&the_menelaus->lock);
|
|
ret = menelaus_write_reg(MENELAUS_VCORE_CTRL3, fval);
|
|
if (ret < 0)
|
|
goto out;
|
|
ret = menelaus_write_reg(MENELAUS_VCORE_CTRL4, rval);
|
|
if (ret < 0)
|
|
goto out;
|
|
if (!the_menelaus->vcore_hw_mode) {
|
|
val = menelaus_read_reg(MENELAUS_VCORE_CTRL1);
|
|
/* HW mode, turn OFF byte comparator */
|
|
val |= ((1 << 7) | (1 << 5));
|
|
ret = menelaus_write_reg(MENELAUS_VCORE_CTRL1, val);
|
|
the_menelaus->vcore_hw_mode = 1;
|
|
}
|
|
msleep(1);
|
|
out:
|
|
mutex_unlock(&the_menelaus->lock);
|
|
return ret;
|
|
}
|
|
|
|
static const struct menelaus_vtg vmem_vtg = {
|
|
.name = "VMEM",
|
|
.vtg_reg = MENELAUS_LDO_CTRL1,
|
|
.vtg_shift = 0,
|
|
.vtg_bits = 2,
|
|
.mode_reg = MENELAUS_LDO_CTRL3,
|
|
};
|
|
|
|
static const struct menelaus_vtg_value vmem_values[] = {
|
|
{ 1500, 0 },
|
|
{ 1800, 1 },
|
|
{ 1900, 2 },
|
|
{ 2500, 3 },
|
|
};
|
|
|
|
int menelaus_set_vmem(unsigned int mV)
|
|
{
|
|
int val;
|
|
|
|
if (mV == 0)
|
|
return menelaus_set_voltage(&vmem_vtg, 0, 0, 0);
|
|
|
|
val = menelaus_get_vtg_value(mV, vmem_values, ARRAY_SIZE(vmem_values));
|
|
if (val < 0)
|
|
return -EINVAL;
|
|
return menelaus_set_voltage(&vmem_vtg, mV, val, 0x02);
|
|
}
|
|
EXPORT_SYMBOL(menelaus_set_vmem);
|
|
|
|
static const struct menelaus_vtg vio_vtg = {
|
|
.name = "VIO",
|
|
.vtg_reg = MENELAUS_LDO_CTRL1,
|
|
.vtg_shift = 2,
|
|
.vtg_bits = 2,
|
|
.mode_reg = MENELAUS_LDO_CTRL4,
|
|
};
|
|
|
|
static const struct menelaus_vtg_value vio_values[] = {
|
|
{ 1500, 0 },
|
|
{ 1800, 1 },
|
|
{ 2500, 2 },
|
|
{ 2800, 3 },
|
|
};
|
|
|
|
int menelaus_set_vio(unsigned int mV)
|
|
{
|
|
int val;
|
|
|
|
if (mV == 0)
|
|
return menelaus_set_voltage(&vio_vtg, 0, 0, 0);
|
|
|
|
val = menelaus_get_vtg_value(mV, vio_values, ARRAY_SIZE(vio_values));
|
|
if (val < 0)
|
|
return -EINVAL;
|
|
return menelaus_set_voltage(&vio_vtg, mV, val, 0x02);
|
|
}
|
|
EXPORT_SYMBOL(menelaus_set_vio);
|
|
|
|
static const struct menelaus_vtg_value vdcdc_values[] = {
|
|
{ 1500, 0 },
|
|
{ 1800, 1 },
|
|
{ 2000, 2 },
|
|
{ 2200, 3 },
|
|
{ 2400, 4 },
|
|
{ 2800, 5 },
|
|
{ 3000, 6 },
|
|
{ 3300, 7 },
|
|
};
|
|
|
|
static const struct menelaus_vtg vdcdc2_vtg = {
|
|
.name = "VDCDC2",
|
|
.vtg_reg = MENELAUS_DCDC_CTRL1,
|
|
.vtg_shift = 0,
|
|
.vtg_bits = 3,
|
|
.mode_reg = MENELAUS_DCDC_CTRL2,
|
|
};
|
|
|
|
static const struct menelaus_vtg vdcdc3_vtg = {
|
|
.name = "VDCDC3",
|
|
.vtg_reg = MENELAUS_DCDC_CTRL1,
|
|
.vtg_shift = 3,
|
|
.vtg_bits = 3,
|
|
.mode_reg = MENELAUS_DCDC_CTRL3,
|
|
};
|
|
|
|
int menelaus_set_vdcdc(int dcdc, unsigned int mV)
|
|
{
|
|
const struct menelaus_vtg *vtg;
|
|
int val;
|
|
|
|
if (dcdc != 2 && dcdc != 3)
|
|
return -EINVAL;
|
|
if (dcdc == 2)
|
|
vtg = &vdcdc2_vtg;
|
|
else
|
|
vtg = &vdcdc3_vtg;
|
|
|
|
if (mV == 0)
|
|
return menelaus_set_voltage(vtg, 0, 0, 0);
|
|
|
|
val = menelaus_get_vtg_value(mV, vdcdc_values,
|
|
ARRAY_SIZE(vdcdc_values));
|
|
if (val < 0)
|
|
return -EINVAL;
|
|
return menelaus_set_voltage(vtg, mV, val, 0x03);
|
|
}
|
|
|
|
static const struct menelaus_vtg_value vmmc_values[] = {
|
|
{ 1850, 0 },
|
|
{ 2800, 1 },
|
|
{ 3000, 2 },
|
|
{ 3100, 3 },
|
|
};
|
|
|
|
static const struct menelaus_vtg vmmc_vtg = {
|
|
.name = "VMMC",
|
|
.vtg_reg = MENELAUS_LDO_CTRL1,
|
|
.vtg_shift = 6,
|
|
.vtg_bits = 2,
|
|
.mode_reg = MENELAUS_LDO_CTRL7,
|
|
};
|
|
|
|
int menelaus_set_vmmc(unsigned int mV)
|
|
{
|
|
int val;
|
|
|
|
if (mV == 0)
|
|
return menelaus_set_voltage(&vmmc_vtg, 0, 0, 0);
|
|
|
|
val = menelaus_get_vtg_value(mV, vmmc_values, ARRAY_SIZE(vmmc_values));
|
|
if (val < 0)
|
|
return -EINVAL;
|
|
return menelaus_set_voltage(&vmmc_vtg, mV, val, 0x02);
|
|
}
|
|
EXPORT_SYMBOL(menelaus_set_vmmc);
|
|
|
|
|
|
static const struct menelaus_vtg_value vaux_values[] = {
|
|
{ 1500, 0 },
|
|
{ 1800, 1 },
|
|
{ 2500, 2 },
|
|
{ 2800, 3 },
|
|
};
|
|
|
|
static const struct menelaus_vtg vaux_vtg = {
|
|
.name = "VAUX",
|
|
.vtg_reg = MENELAUS_LDO_CTRL1,
|
|
.vtg_shift = 4,
|
|
.vtg_bits = 2,
|
|
.mode_reg = MENELAUS_LDO_CTRL6,
|
|
};
|
|
|
|
int menelaus_set_vaux(unsigned int mV)
|
|
{
|
|
int val;
|
|
|
|
if (mV == 0)
|
|
return menelaus_set_voltage(&vaux_vtg, 0, 0, 0);
|
|
|
|
val = menelaus_get_vtg_value(mV, vaux_values, ARRAY_SIZE(vaux_values));
|
|
if (val < 0)
|
|
return -EINVAL;
|
|
return menelaus_set_voltage(&vaux_vtg, mV, val, 0x02);
|
|
}
|
|
EXPORT_SYMBOL(menelaus_set_vaux);
|
|
|
|
int menelaus_get_slot_pin_states(void)
|
|
{
|
|
return menelaus_read_reg(MENELAUS_MCT_PIN_ST);
|
|
}
|
|
EXPORT_SYMBOL(menelaus_get_slot_pin_states);
|
|
|
|
int menelaus_set_regulator_sleep(int enable, u32 val)
|
|
{
|
|
int t, ret;
|
|
struct i2c_client *c = the_menelaus->client;
|
|
|
|
mutex_lock(&the_menelaus->lock);
|
|
ret = menelaus_write_reg(MENELAUS_SLEEP_CTRL2, val);
|
|
if (ret < 0)
|
|
goto out;
|
|
|
|
dev_dbg(&c->dev, "regulator sleep configuration: %02x\n", val);
|
|
|
|
ret = menelaus_read_reg(MENELAUS_GPIO_CTRL);
|
|
if (ret < 0)
|
|
goto out;
|
|
t = ((1 << 6) | 0x04);
|
|
if (enable)
|
|
ret |= t;
|
|
else
|
|
ret &= ~t;
|
|
ret = menelaus_write_reg(MENELAUS_GPIO_CTRL, ret);
|
|
out:
|
|
mutex_unlock(&the_menelaus->lock);
|
|
return ret;
|
|
}
|
|
|
|
/*-----------------------------------------------------------------------*/
|
|
|
|
/* Handles Menelaus interrupts. Does not run in interrupt context */
|
|
static void menelaus_work(struct work_struct *_menelaus)
|
|
{
|
|
struct menelaus_chip *menelaus =
|
|
container_of(_menelaus, struct menelaus_chip, work);
|
|
void (*handler)(struct menelaus_chip *menelaus);
|
|
|
|
while (1) {
|
|
unsigned isr;
|
|
|
|
isr = (menelaus_read_reg(MENELAUS_INT_STATUS2)
|
|
& ~menelaus->mask2) << 8;
|
|
isr |= menelaus_read_reg(MENELAUS_INT_STATUS1)
|
|
& ~menelaus->mask1;
|
|
if (!isr)
|
|
break;
|
|
|
|
while (isr) {
|
|
int irq = fls(isr) - 1;
|
|
isr &= ~(1 << irq);
|
|
|
|
mutex_lock(&menelaus->lock);
|
|
menelaus_disable_irq(irq);
|
|
menelaus_ack_irq(irq);
|
|
handler = menelaus->handlers[irq];
|
|
if (handler)
|
|
handler(menelaus);
|
|
menelaus_enable_irq(irq);
|
|
mutex_unlock(&menelaus->lock);
|
|
}
|
|
}
|
|
enable_irq(menelaus->client->irq);
|
|
}
|
|
|
|
/*
|
|
* We cannot use I2C in interrupt context, so we just schedule work.
|
|
*/
|
|
static irqreturn_t menelaus_irq(int irq, void *_menelaus)
|
|
{
|
|
struct menelaus_chip *menelaus = _menelaus;
|
|
|
|
disable_irq_nosync(irq);
|
|
(void)schedule_work(&menelaus->work);
|
|
|
|
return IRQ_HANDLED;
|
|
}
|
|
|
|
/*-----------------------------------------------------------------------*/
|
|
|
|
/*
|
|
* The RTC needs to be set once, then it runs on backup battery power.
|
|
* It supports alarms, including system wake alarms (from some modes);
|
|
* and 1/second IRQs if requested.
|
|
*/
|
|
#ifdef CONFIG_RTC_DRV_TWL92330
|
|
|
|
#define RTC_CTRL_RTC_EN (1 << 0)
|
|
#define RTC_CTRL_AL_EN (1 << 1)
|
|
#define RTC_CTRL_MODE12 (1 << 2)
|
|
#define RTC_CTRL_EVERY_MASK (3 << 3)
|
|
#define RTC_CTRL_EVERY_SEC (0 << 3)
|
|
#define RTC_CTRL_EVERY_MIN (1 << 3)
|
|
#define RTC_CTRL_EVERY_HR (2 << 3)
|
|
#define RTC_CTRL_EVERY_DAY (3 << 3)
|
|
|
|
#define RTC_UPDATE_EVERY 0x08
|
|
|
|
#define RTC_HR_PM (1 << 7)
|
|
|
|
static void menelaus_to_time(char *regs, struct rtc_time *t)
|
|
{
|
|
t->tm_sec = bcd2bin(regs[0]);
|
|
t->tm_min = bcd2bin(regs[1]);
|
|
if (the_menelaus->rtc_control & RTC_CTRL_MODE12) {
|
|
t->tm_hour = bcd2bin(regs[2] & 0x1f) - 1;
|
|
if (regs[2] & RTC_HR_PM)
|
|
t->tm_hour += 12;
|
|
} else
|
|
t->tm_hour = bcd2bin(regs[2] & 0x3f);
|
|
t->tm_mday = bcd2bin(regs[3]);
|
|
t->tm_mon = bcd2bin(regs[4]) - 1;
|
|
t->tm_year = bcd2bin(regs[5]) + 100;
|
|
}
|
|
|
|
static int time_to_menelaus(struct rtc_time *t, int regnum)
|
|
{
|
|
int hour, status;
|
|
|
|
status = menelaus_write_reg(regnum++, bin2bcd(t->tm_sec));
|
|
if (status < 0)
|
|
goto fail;
|
|
|
|
status = menelaus_write_reg(regnum++, bin2bcd(t->tm_min));
|
|
if (status < 0)
|
|
goto fail;
|
|
|
|
if (the_menelaus->rtc_control & RTC_CTRL_MODE12) {
|
|
hour = t->tm_hour + 1;
|
|
if (hour > 12)
|
|
hour = RTC_HR_PM | bin2bcd(hour - 12);
|
|
else
|
|
hour = bin2bcd(hour);
|
|
} else
|
|
hour = bin2bcd(t->tm_hour);
|
|
status = menelaus_write_reg(regnum++, hour);
|
|
if (status < 0)
|
|
goto fail;
|
|
|
|
status = menelaus_write_reg(regnum++, bin2bcd(t->tm_mday));
|
|
if (status < 0)
|
|
goto fail;
|
|
|
|
status = menelaus_write_reg(regnum++, bin2bcd(t->tm_mon + 1));
|
|
if (status < 0)
|
|
goto fail;
|
|
|
|
status = menelaus_write_reg(regnum++, bin2bcd(t->tm_year - 100));
|
|
if (status < 0)
|
|
goto fail;
|
|
|
|
return 0;
|
|
fail:
|
|
dev_err(&the_menelaus->client->dev, "rtc write reg %02x, err %d\n",
|
|
--regnum, status);
|
|
return status;
|
|
}
|
|
|
|
static int menelaus_read_time(struct device *dev, struct rtc_time *t)
|
|
{
|
|
struct i2c_msg msg[2];
|
|
char regs[7];
|
|
int status;
|
|
|
|
/* block read date and time registers */
|
|
regs[0] = MENELAUS_RTC_SEC;
|
|
|
|
msg[0].addr = MENELAUS_I2C_ADDRESS;
|
|
msg[0].flags = 0;
|
|
msg[0].len = 1;
|
|
msg[0].buf = regs;
|
|
|
|
msg[1].addr = MENELAUS_I2C_ADDRESS;
|
|
msg[1].flags = I2C_M_RD;
|
|
msg[1].len = sizeof(regs);
|
|
msg[1].buf = regs;
|
|
|
|
status = i2c_transfer(the_menelaus->client->adapter, msg, 2);
|
|
if (status != 2) {
|
|
dev_err(dev, "%s error %d\n", "read", status);
|
|
return -EIO;
|
|
}
|
|
|
|
menelaus_to_time(regs, t);
|
|
t->tm_wday = bcd2bin(regs[6]);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int menelaus_set_time(struct device *dev, struct rtc_time *t)
|
|
{
|
|
int status;
|
|
|
|
/* write date and time registers */
|
|
status = time_to_menelaus(t, MENELAUS_RTC_SEC);
|
|
if (status < 0)
|
|
return status;
|
|
status = menelaus_write_reg(MENELAUS_RTC_WKDAY, bin2bcd(t->tm_wday));
|
|
if (status < 0) {
|
|
dev_err(&the_menelaus->client->dev, "rtc write reg %02x "
|
|
"err %d\n", MENELAUS_RTC_WKDAY, status);
|
|
return status;
|
|
}
|
|
|
|
/* now commit the write */
|
|
status = menelaus_write_reg(MENELAUS_RTC_UPDATE, RTC_UPDATE_EVERY);
|
|
if (status < 0)
|
|
dev_err(&the_menelaus->client->dev, "rtc commit time, err %d\n",
|
|
status);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int menelaus_read_alarm(struct device *dev, struct rtc_wkalrm *w)
|
|
{
|
|
struct i2c_msg msg[2];
|
|
char regs[6];
|
|
int status;
|
|
|
|
/* block read alarm registers */
|
|
regs[0] = MENELAUS_RTC_AL_SEC;
|
|
|
|
msg[0].addr = MENELAUS_I2C_ADDRESS;
|
|
msg[0].flags = 0;
|
|
msg[0].len = 1;
|
|
msg[0].buf = regs;
|
|
|
|
msg[1].addr = MENELAUS_I2C_ADDRESS;
|
|
msg[1].flags = I2C_M_RD;
|
|
msg[1].len = sizeof(regs);
|
|
msg[1].buf = regs;
|
|
|
|
status = i2c_transfer(the_menelaus->client->adapter, msg, 2);
|
|
if (status != 2) {
|
|
dev_err(dev, "%s error %d\n", "alarm read", status);
|
|
return -EIO;
|
|
}
|
|
|
|
menelaus_to_time(regs, &w->time);
|
|
|
|
w->enabled = !!(the_menelaus->rtc_control & RTC_CTRL_AL_EN);
|
|
|
|
/* NOTE we *could* check if actually pending... */
|
|
w->pending = 0;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int menelaus_set_alarm(struct device *dev, struct rtc_wkalrm *w)
|
|
{
|
|
int status;
|
|
|
|
if (the_menelaus->client->irq <= 0 && w->enabled)
|
|
return -ENODEV;
|
|
|
|
/* clear previous alarm enable */
|
|
if (the_menelaus->rtc_control & RTC_CTRL_AL_EN) {
|
|
the_menelaus->rtc_control &= ~RTC_CTRL_AL_EN;
|
|
status = menelaus_write_reg(MENELAUS_RTC_CTRL,
|
|
the_menelaus->rtc_control);
|
|
if (status < 0)
|
|
return status;
|
|
}
|
|
|
|
/* write alarm registers */
|
|
status = time_to_menelaus(&w->time, MENELAUS_RTC_AL_SEC);
|
|
if (status < 0)
|
|
return status;
|
|
|
|
/* enable alarm if requested */
|
|
if (w->enabled) {
|
|
the_menelaus->rtc_control |= RTC_CTRL_AL_EN;
|
|
status = menelaus_write_reg(MENELAUS_RTC_CTRL,
|
|
the_menelaus->rtc_control);
|
|
}
|
|
|
|
return status;
|
|
}
|
|
|
|
#ifdef CONFIG_RTC_INTF_DEV
|
|
|
|
static void menelaus_rtc_update_work(struct menelaus_chip *m)
|
|
{
|
|
/* report 1/sec update */
|
|
local_irq_disable();
|
|
rtc_update_irq(m->rtc, 1, RTC_IRQF | RTC_UF);
|
|
local_irq_enable();
|
|
}
|
|
|
|
static int menelaus_ioctl(struct device *dev, unsigned cmd, unsigned long arg)
|
|
{
|
|
int status;
|
|
|
|
if (the_menelaus->client->irq <= 0)
|
|
return -ENOIOCTLCMD;
|
|
|
|
switch (cmd) {
|
|
/* alarm IRQ */
|
|
case RTC_AIE_ON:
|
|
if (the_menelaus->rtc_control & RTC_CTRL_AL_EN)
|
|
return 0;
|
|
the_menelaus->rtc_control |= RTC_CTRL_AL_EN;
|
|
break;
|
|
case RTC_AIE_OFF:
|
|
if (!(the_menelaus->rtc_control & RTC_CTRL_AL_EN))
|
|
return 0;
|
|
the_menelaus->rtc_control &= ~RTC_CTRL_AL_EN;
|
|
break;
|
|
/* 1/second "update" IRQ */
|
|
case RTC_UIE_ON:
|
|
if (the_menelaus->uie)
|
|
return 0;
|
|
status = menelaus_remove_irq_work(MENELAUS_RTCTMR_IRQ);
|
|
status = menelaus_add_irq_work(MENELAUS_RTCTMR_IRQ,
|
|
menelaus_rtc_update_work);
|
|
if (status == 0)
|
|
the_menelaus->uie = 1;
|
|
return status;
|
|
case RTC_UIE_OFF:
|
|
if (!the_menelaus->uie)
|
|
return 0;
|
|
status = menelaus_remove_irq_work(MENELAUS_RTCTMR_IRQ);
|
|
if (status == 0)
|
|
the_menelaus->uie = 0;
|
|
return status;
|
|
default:
|
|
return -ENOIOCTLCMD;
|
|
}
|
|
return menelaus_write_reg(MENELAUS_RTC_CTRL, the_menelaus->rtc_control);
|
|
}
|
|
|
|
#else
|
|
#define menelaus_ioctl NULL
|
|
#endif
|
|
|
|
/* REVISIT no compensation register support ... */
|
|
|
|
static const struct rtc_class_ops menelaus_rtc_ops = {
|
|
.ioctl = menelaus_ioctl,
|
|
.read_time = menelaus_read_time,
|
|
.set_time = menelaus_set_time,
|
|
.read_alarm = menelaus_read_alarm,
|
|
.set_alarm = menelaus_set_alarm,
|
|
};
|
|
|
|
static void menelaus_rtc_alarm_work(struct menelaus_chip *m)
|
|
{
|
|
/* report alarm */
|
|
local_irq_disable();
|
|
rtc_update_irq(m->rtc, 1, RTC_IRQF | RTC_AF);
|
|
local_irq_enable();
|
|
|
|
/* then disable it; alarms are oneshot */
|
|
the_menelaus->rtc_control &= ~RTC_CTRL_AL_EN;
|
|
menelaus_write_reg(MENELAUS_RTC_CTRL, the_menelaus->rtc_control);
|
|
}
|
|
|
|
static inline void menelaus_rtc_init(struct menelaus_chip *m)
|
|
{
|
|
int alarm = (m->client->irq > 0);
|
|
|
|
/* assume 32KDETEN pin is pulled high */
|
|
if (!(menelaus_read_reg(MENELAUS_OSC_CTRL) & 0x80)) {
|
|
dev_dbg(&m->client->dev, "no 32k oscillator\n");
|
|
return;
|
|
}
|
|
|
|
/* support RTC alarm; it can issue wakeups */
|
|
if (alarm) {
|
|
if (menelaus_add_irq_work(MENELAUS_RTCALM_IRQ,
|
|
menelaus_rtc_alarm_work) < 0) {
|
|
dev_err(&m->client->dev, "can't handle RTC alarm\n");
|
|
return;
|
|
}
|
|
device_init_wakeup(&m->client->dev, 1);
|
|
}
|
|
|
|
/* be sure RTC is enabled; allow 1/sec irqs; leave 12hr mode alone */
|
|
m->rtc_control = menelaus_read_reg(MENELAUS_RTC_CTRL);
|
|
if (!(m->rtc_control & RTC_CTRL_RTC_EN)
|
|
|| (m->rtc_control & RTC_CTRL_AL_EN)
|
|
|| (m->rtc_control & RTC_CTRL_EVERY_MASK)) {
|
|
if (!(m->rtc_control & RTC_CTRL_RTC_EN)) {
|
|
dev_warn(&m->client->dev, "rtc clock needs setting\n");
|
|
m->rtc_control |= RTC_CTRL_RTC_EN;
|
|
}
|
|
m->rtc_control &= ~RTC_CTRL_EVERY_MASK;
|
|
m->rtc_control &= ~RTC_CTRL_AL_EN;
|
|
menelaus_write_reg(MENELAUS_RTC_CTRL, m->rtc_control);
|
|
}
|
|
|
|
m->rtc = rtc_device_register(DRIVER_NAME,
|
|
&m->client->dev,
|
|
&menelaus_rtc_ops, THIS_MODULE);
|
|
if (IS_ERR(m->rtc)) {
|
|
if (alarm) {
|
|
menelaus_remove_irq_work(MENELAUS_RTCALM_IRQ);
|
|
device_init_wakeup(&m->client->dev, 0);
|
|
}
|
|
dev_err(&m->client->dev, "can't register RTC: %d\n",
|
|
(int) PTR_ERR(m->rtc));
|
|
the_menelaus->rtc = NULL;
|
|
}
|
|
}
|
|
|
|
#else
|
|
|
|
static inline void menelaus_rtc_init(struct menelaus_chip *m)
|
|
{
|
|
/* nothing */
|
|
}
|
|
|
|
#endif
|
|
|
|
/*-----------------------------------------------------------------------*/
|
|
|
|
static struct i2c_driver menelaus_i2c_driver;
|
|
|
|
static int menelaus_probe(struct i2c_client *client,
|
|
const struct i2c_device_id *id)
|
|
{
|
|
struct menelaus_chip *menelaus;
|
|
int rev = 0, val;
|
|
int err = 0;
|
|
struct menelaus_platform_data *menelaus_pdata =
|
|
client->dev.platform_data;
|
|
|
|
if (the_menelaus) {
|
|
dev_dbg(&client->dev, "only one %s for now\n",
|
|
DRIVER_NAME);
|
|
return -ENODEV;
|
|
}
|
|
|
|
menelaus = kzalloc(sizeof *menelaus, GFP_KERNEL);
|
|
if (!menelaus)
|
|
return -ENOMEM;
|
|
|
|
i2c_set_clientdata(client, menelaus);
|
|
|
|
the_menelaus = menelaus;
|
|
menelaus->client = client;
|
|
|
|
/* If a true probe check the device */
|
|
rev = menelaus_read_reg(MENELAUS_REV);
|
|
if (rev < 0) {
|
|
pr_err(DRIVER_NAME ": device not found");
|
|
err = -ENODEV;
|
|
goto fail1;
|
|
}
|
|
|
|
/* Ack and disable all Menelaus interrupts */
|
|
menelaus_write_reg(MENELAUS_INT_ACK1, 0xff);
|
|
menelaus_write_reg(MENELAUS_INT_ACK2, 0xff);
|
|
menelaus_write_reg(MENELAUS_INT_MASK1, 0xff);
|
|
menelaus_write_reg(MENELAUS_INT_MASK2, 0xff);
|
|
menelaus->mask1 = 0xff;
|
|
menelaus->mask2 = 0xff;
|
|
|
|
/* Set output buffer strengths */
|
|
menelaus_write_reg(MENELAUS_MCT_CTRL1, 0x73);
|
|
|
|
if (client->irq > 0) {
|
|
err = request_irq(client->irq, menelaus_irq, IRQF_DISABLED,
|
|
DRIVER_NAME, menelaus);
|
|
if (err) {
|
|
dev_dbg(&client->dev, "can't get IRQ %d, err %d\n",
|
|
client->irq, err);
|
|
goto fail1;
|
|
}
|
|
}
|
|
|
|
mutex_init(&menelaus->lock);
|
|
INIT_WORK(&menelaus->work, menelaus_work);
|
|
|
|
pr_info("Menelaus rev %d.%d\n", rev >> 4, rev & 0x0f);
|
|
|
|
val = menelaus_read_reg(MENELAUS_VCORE_CTRL1);
|
|
if (val < 0)
|
|
goto fail2;
|
|
if (val & (1 << 7))
|
|
menelaus->vcore_hw_mode = 1;
|
|
else
|
|
menelaus->vcore_hw_mode = 0;
|
|
|
|
if (menelaus_pdata != NULL && menelaus_pdata->late_init != NULL) {
|
|
err = menelaus_pdata->late_init(&client->dev);
|
|
if (err < 0)
|
|
goto fail2;
|
|
}
|
|
|
|
menelaus_rtc_init(menelaus);
|
|
|
|
return 0;
|
|
fail2:
|
|
free_irq(client->irq, menelaus);
|
|
flush_scheduled_work();
|
|
fail1:
|
|
kfree(menelaus);
|
|
return err;
|
|
}
|
|
|
|
static int __exit menelaus_remove(struct i2c_client *client)
|
|
{
|
|
struct menelaus_chip *menelaus = i2c_get_clientdata(client);
|
|
|
|
free_irq(client->irq, menelaus);
|
|
kfree(menelaus);
|
|
the_menelaus = NULL;
|
|
return 0;
|
|
}
|
|
|
|
static const struct i2c_device_id menelaus_id[] = {
|
|
{ "menelaus", 0 },
|
|
{ }
|
|
};
|
|
MODULE_DEVICE_TABLE(i2c, menelaus_id);
|
|
|
|
static struct i2c_driver menelaus_i2c_driver = {
|
|
.driver = {
|
|
.name = DRIVER_NAME,
|
|
},
|
|
.probe = menelaus_probe,
|
|
.remove = __exit_p(menelaus_remove),
|
|
.id_table = menelaus_id,
|
|
};
|
|
|
|
static int __init menelaus_init(void)
|
|
{
|
|
int res;
|
|
|
|
res = i2c_add_driver(&menelaus_i2c_driver);
|
|
if (res < 0) {
|
|
pr_err(DRIVER_NAME ": driver registration failed\n");
|
|
return res;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void __exit menelaus_exit(void)
|
|
{
|
|
i2c_del_driver(&menelaus_i2c_driver);
|
|
|
|
/* FIXME: Shutdown menelaus parts that can be shut down */
|
|
}
|
|
|
|
MODULE_AUTHOR("Texas Instruments, Inc. (and others)");
|
|
MODULE_DESCRIPTION("I2C interface for Menelaus.");
|
|
MODULE_LICENSE("GPL");
|
|
|
|
module_init(menelaus_init);
|
|
module_exit(menelaus_exit);
|