OMAP: add TI TWL92330/Menelaus Power Management chip driver
Add Texas Instruments TWL92330/Menelaus Power Management chip driver. This
includes voltage regulators, Dual slot memory card tranceivers and
real-time clock(RTC).
The support for RTC is integrated with this driver only; it is not separate
module. Passes 'rtctest' on OMAP H4 EVM, other than lack of "periodic"
(1/N second) IRQs. System wakeup alarms (from suspend-to-RAM) work too.
The battery keeps the RTC active over power off, so once you set clock
(rdate/ntpdate/etc, then "hwclock -w") then RTC_HCTOSYS at boot time will
behave as expected.
Cc: "Jean Delvare" <khali@linux-fr.org>
Cc: "Tony Lindgren" <tony@atomide.com>
Cc: "David Brownell" <david-b@pacbell.net>
Signed-off-by: Trilok Soni <soni.trilok@gmail.com>
Acked-by: Alessandro Zummo <alessandro.zummo@towertech.it>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
diff --git a/drivers/i2c/chips/menelaus.c b/drivers/i2c/chips/menelaus.c
new file mode 100644
index 0000000..48a7e2f
--- /dev/null
+++ b/drivers/i2c/chips/menelaus.c
@@ -0,0 +1,1281 @@
+#define DEBUG
+/*
+ * Copyright (C) 2004 Texas Instruments, Inc.
+ *
+ * Some parts based tps65010.c:
+ * Copyright (C) 2004 Texas Instruments and
+ * Copyright (C) 2004-2005 David Brownell
+ *
+ * Some parts based on tlv320aic24.c:
+ * Copyright (C) by Kai Svahn <kai.svahn@nokia.com>
+ *
+ * Changes for interrupt handling and clean-up by
+ * Tony Lindgren <tony@atomide.com> and Imre Deak <imre.deak@nokia.com>
+ * Cleanup and generalized support for voltage setting by
+ * Juha Yrjola
+ * Added support for controlling VCORE and regulator sleep states,
+ * Amit Kucheria <amit.kucheria@nokia.com>
+ * Copyright (C) 2005, 2006 Nokia Corporation
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ */
+
+#include <linux/module.h>
+#include <linux/i2c.h>
+#include <linux/interrupt.h>
+#include <linux/sched.h>
+#include <linux/mutex.h>
+#include <linux/workqueue.h>
+#include <linux/delay.h>
+#include <linux/rtc.h>
+#include <linux/bcd.h>
+
+#include <asm/mach-types.h>
+#include <asm/mach/irq.h>
+
+#include <asm/arch/gpio.h>
+#include <asm/arch/menelaus.h>
+
+#define DRIVER_NAME "menelaus"
+
+#define pr_err(fmt, arg...) printk(KERN_ERR DRIVER_NAME ": ", ## arg);
+
+#define MENELAUS_I2C_ADDRESS 0x72
+
+#define MENELAUS_REV 0x01
+#define MENELAUS_VCORE_CTRL1 0x02
+#define MENELAUS_VCORE_CTRL2 0x03
+#define MENELAUS_VCORE_CTRL3 0x04
+#define MENELAUS_VCORE_CTRL4 0x05
+#define MENELAUS_VCORE_CTRL5 0x06
+#define MENELAUS_DCDC_CTRL1 0x07
+#define MENELAUS_DCDC_CTRL2 0x08
+#define MENELAUS_DCDC_CTRL3 0x09
+#define MENELAUS_LDO_CTRL1 0x0A
+#define MENELAUS_LDO_CTRL2 0x0B
+#define MENELAUS_LDO_CTRL3 0x0C
+#define MENELAUS_LDO_CTRL4 0x0D
+#define MENELAUS_LDO_CTRL5 0x0E
+#define MENELAUS_LDO_CTRL6 0x0F
+#define MENELAUS_LDO_CTRL7 0x10
+#define MENELAUS_LDO_CTRL8 0x11
+#define MENELAUS_SLEEP_CTRL1 0x12
+#define MENELAUS_SLEEP_CTRL2 0x13
+#define MENELAUS_DEVICE_OFF 0x14
+#define MENELAUS_OSC_CTRL 0x15
+#define MENELAUS_DETECT_CTRL 0x16
+#define MENELAUS_INT_MASK1 0x17
+#define MENELAUS_INT_MASK2 0x18
+#define MENELAUS_INT_STATUS1 0x19
+#define MENELAUS_INT_STATUS2 0x1A
+#define MENELAUS_INT_ACK1 0x1B
+#define MENELAUS_INT_ACK2 0x1C
+#define MENELAUS_GPIO_CTRL 0x1D
+#define MENELAUS_GPIO_IN 0x1E
+#define MENELAUS_GPIO_OUT 0x1F
+#define MENELAUS_BBSMS 0x20
+#define MENELAUS_RTC_CTRL 0x21
+#define MENELAUS_RTC_UPDATE 0x22
+#define MENELAUS_RTC_SEC 0x23
+#define MENELAUS_RTC_MIN 0x24
+#define MENELAUS_RTC_HR 0x25
+#define MENELAUS_RTC_DAY 0x26
+#define MENELAUS_RTC_MON 0x27
+#define MENELAUS_RTC_YR 0x28
+#define MENELAUS_RTC_WKDAY 0x29
+#define MENELAUS_RTC_AL_SEC 0x2A
+#define MENELAUS_RTC_AL_MIN 0x2B
+#define MENELAUS_RTC_AL_HR 0x2C
+#define MENELAUS_RTC_AL_DAY 0x2D
+#define MENELAUS_RTC_AL_MON 0x2E
+#define MENELAUS_RTC_AL_YR 0x2F
+#define MENELAUS_RTC_COMP_MSB 0x30
+#define MENELAUS_RTC_COMP_LSB 0x31
+#define MENELAUS_S1_PULL_EN 0x32
+#define MENELAUS_S1_PULL_DIR 0x33
+#define MENELAUS_S2_PULL_EN 0x34
+#define MENELAUS_S2_PULL_DIR 0x35
+#define MENELAUS_MCT_CTRL1 0x36
+#define MENELAUS_MCT_CTRL2 0x37
+#define MENELAUS_MCT_CTRL3 0x38
+#define MENELAUS_MCT_PIN_ST 0x39
+#define MENELAUS_DEBOUNCE1 0x3A
+
+#define IH_MENELAUS_IRQS 12
+#define MENELAUS_MMC_S1CD_IRQ 0 /* MMC slot 1 card change */
+#define MENELAUS_MMC_S2CD_IRQ 1 /* MMC slot 2 card change */
+#define MENELAUS_MMC_S1D1_IRQ 2 /* MMC DAT1 low in slot 1 */
+#define MENELAUS_MMC_S2D1_IRQ 3 /* MMC DAT1 low in slot 2 */
+#define MENELAUS_LOWBAT_IRQ 4 /* Low battery */
+#define MENELAUS_HOTDIE_IRQ 5 /* Hot die detect */
+#define MENELAUS_UVLO_IRQ 6 /* UVLO detect */
+#define MENELAUS_TSHUT_IRQ 7 /* Thermal shutdown */
+#define MENELAUS_RTCTMR_IRQ 8 /* RTC timer */
+#define MENELAUS_RTCALM_IRQ 9 /* RTC alarm */
+#define MENELAUS_RTCERR_IRQ 10 /* RTC error */
+#define MENELAUS_PSHBTN_IRQ 11 /* Push button */
+#define MENELAUS_RESERVED12_IRQ 12 /* Reserved */
+#define MENELAUS_RESERVED13_IRQ 13 /* Reserved */
+#define MENELAUS_RESERVED14_IRQ 14 /* Reserved */
+#define MENELAUS_RESERVED15_IRQ 15 /* Reserved */
+
+static void menelaus_work(struct work_struct *_menelaus);
+
+struct menelaus_chip {
+ struct mutex lock;
+ struct i2c_client *client;
+ struct work_struct work;
+#ifdef CONFIG_RTC_DRV_TWL92330
+ struct rtc_device *rtc;
+ u8 rtc_control;
+ unsigned uie:1;
+#endif
+ unsigned vcore_hw_mode:1;
+ u8 mask1, mask2;
+ void (*handlers[16])(struct menelaus_chip *);
+ void (*mmc_callback)(void *data, u8 mask);
+ void *mmc_callback_data;
+};
+
+static struct menelaus_chip *the_menelaus;
+
+static int menelaus_write_reg(int reg, u8 value)
+{
+ int val = i2c_smbus_write_byte_data(the_menelaus->client, reg, value);
+
+ if (val < 0) {
+ pr_err("write error");
+ return val;
+ }
+
+ return 0;
+}
+
+static int menelaus_read_reg(int reg)
+{
+ int val = i2c_smbus_read_byte_data(the_menelaus->client, reg);
+
+ if (val < 0)
+ pr_err("read error");
+
+ return val;
+}
+
+static int menelaus_enable_irq(int irq)
+{
+ if (irq > 7) {
+ irq -= 8;
+ the_menelaus->mask2 &= ~(1 << irq);
+ return menelaus_write_reg(MENELAUS_INT_MASK2,
+ the_menelaus->mask2);
+ } else {
+ the_menelaus->mask1 &= ~(1 << irq);
+ return menelaus_write_reg(MENELAUS_INT_MASK1,
+ the_menelaus->mask1);
+ }
+}
+
+static int menelaus_disable_irq(int irq)
+{
+ if (irq > 7) {
+ irq -= 8;
+ the_menelaus->mask2 |= (1 << irq);
+ return menelaus_write_reg(MENELAUS_INT_MASK2,
+ the_menelaus->mask2);
+ } else {
+ the_menelaus->mask1 |= (1 << irq);
+ return menelaus_write_reg(MENELAUS_INT_MASK1,
+ the_menelaus->mask1);
+ }
+}
+
+static int menelaus_ack_irq(int irq)
+{
+ if (irq > 7)
+ return menelaus_write_reg(MENELAUS_INT_ACK2, 1 << (irq - 8));
+ else
+ return menelaus_write_reg(MENELAUS_INT_ACK1, 1 << irq);
+}
+
+/* Adds a handler for an interrupt. Does not run in interrupt context */
+static int menelaus_add_irq_work(int irq,
+ void (*handler)(struct menelaus_chip *))
+{
+ int ret = 0;
+
+ mutex_lock(&the_menelaus->lock);
+ the_menelaus->handlers[irq] = handler;
+ ret = menelaus_enable_irq(irq);
+ mutex_unlock(&the_menelaus->lock);
+
+ return ret;
+}
+
+/* Removes handler for an interrupt */
+static int menelaus_remove_irq_work(int irq)
+{
+ int ret = 0;
+
+ mutex_lock(&the_menelaus->lock);
+ ret = menelaus_disable_irq(irq);
+ the_menelaus->handlers[irq] = NULL;
+ mutex_unlock(&the_menelaus->lock);
+
+ return ret;
+}
+
+/*
+ * Gets scheduled when a card detect interrupt happens. Note that in some cases
+ * this line is wired to card cover switch rather than the card detect switch
+ * in each slot. In this case the cards are not seen by menelaus.
+ * FIXME: Add handling for D1 too
+ */
+static void menelaus_mmc_cd_work(struct menelaus_chip *menelaus_hw)
+{
+ int reg;
+ unsigned char card_mask = 0;
+
+ reg = menelaus_read_reg(MENELAUS_MCT_PIN_ST);
+ if (reg < 0)
+ return;
+
+ if (!(reg & 0x1))
+ card_mask |= (1 << 0);
+
+ if (!(reg & 0x2))
+ card_mask |= (1 << 1);
+
+ if (menelaus_hw->mmc_callback)
+ menelaus_hw->mmc_callback(menelaus_hw->mmc_callback_data,
+ card_mask);
+}
+
+/*
+ * Toggles the MMC slots between open-drain and push-pull mode.
+ */
+int menelaus_set_mmc_opendrain(int slot, int enable)
+{
+ int ret, val;
+
+ if (slot != 1 && slot != 2)
+ return -EINVAL;
+ mutex_lock(&the_menelaus->lock);
+ ret = menelaus_read_reg(MENELAUS_MCT_CTRL1);
+ if (ret < 0) {
+ mutex_unlock(&the_menelaus->lock);
+ return ret;
+ }
+ val = ret;
+ if (slot == 1) {
+ if (enable)
+ val |= 1 << 2;
+ else
+ val &= ~(1 << 2);
+ } else {
+ if (enable)
+ val |= 1 << 3;
+ else
+ val &= ~(1 << 3);
+ }
+ ret = menelaus_write_reg(MENELAUS_MCT_CTRL1, val);
+ mutex_unlock(&the_menelaus->lock);
+
+ return ret;
+}
+EXPORT_SYMBOL(menelaus_set_mmc_opendrain);
+
+int menelaus_set_slot_sel(int enable)
+{
+ int ret;
+
+ mutex_lock(&the_menelaus->lock);
+ ret = menelaus_read_reg(MENELAUS_GPIO_CTRL);
+ if (ret < 0)
+ goto out;
+ ret |= 0x02;
+ if (enable)
+ ret |= 1 << 5;
+ else
+ ret &= ~(1 << 5);
+ ret = menelaus_write_reg(MENELAUS_GPIO_CTRL, ret);
+out:
+ mutex_unlock(&the_menelaus->lock);
+ return ret;
+}
+EXPORT_SYMBOL(menelaus_set_slot_sel);
+
+int menelaus_set_mmc_slot(int slot, int enable, int power, int cd_en)
+{
+ int ret, val;
+
+ if (slot != 1 && slot != 2)
+ return -EINVAL;
+ if (power >= 3)
+ return -EINVAL;
+
+ mutex_lock(&the_menelaus->lock);
+
+ ret = menelaus_read_reg(MENELAUS_MCT_CTRL2);
+ if (ret < 0)
+ goto out;
+ val = ret;
+ if (slot == 1) {
+ if (cd_en)
+ val |= (1 << 4) | (1 << 6);
+ else
+ val &= ~((1 << 4) | (1 << 6));
+ } else {
+ if (cd_en)
+ val |= (1 << 5) | (1 << 7);
+ else
+ val &= ~((1 << 5) | (1 << 7));
+ }
+ ret = menelaus_write_reg(MENELAUS_MCT_CTRL2, val);
+ if (ret < 0)
+ goto out;
+
+ ret = menelaus_read_reg(MENELAUS_MCT_CTRL3);
+ if (ret < 0)
+ goto out;
+ val = ret;
+ if (slot == 1) {
+ if (enable)
+ val |= 1 << 0;
+ else
+ val &= ~(1 << 0);
+ } else {
+ int b;
+
+ if (enable)
+ ret |= 1 << 1;
+ else
+ ret &= ~(1 << 1);
+ b = menelaus_read_reg(MENELAUS_MCT_CTRL2);
+ b &= ~0x03;
+ b |= power;
+ ret = menelaus_write_reg(MENELAUS_MCT_CTRL2, b);
+ if (ret < 0)
+ goto out;
+ }
+ /* Disable autonomous shutdown */
+ val &= ~(0x03 << 2);
+ ret = menelaus_write_reg(MENELAUS_MCT_CTRL3, val);
+out:
+ mutex_unlock(&the_menelaus->lock);
+ return ret;
+}
+EXPORT_SYMBOL(menelaus_set_mmc_slot);
+
+int menelaus_register_mmc_callback(void (*callback)(void *data, u8 card_mask),
+ void *data)
+{
+ int ret = 0;
+
+ the_menelaus->mmc_callback_data = data;
+ the_menelaus->mmc_callback = callback;
+ ret = menelaus_add_irq_work(MENELAUS_MMC_S1CD_IRQ,
+ menelaus_mmc_cd_work);
+ if (ret < 0)
+ return ret;
+ ret = menelaus_add_irq_work(MENELAUS_MMC_S2CD_IRQ,
+ menelaus_mmc_cd_work);
+ if (ret < 0)
+ return ret;
+ ret = menelaus_add_irq_work(MENELAUS_MMC_S1D1_IRQ,
+ menelaus_mmc_cd_work);
+ if (ret < 0)
+ return ret;
+ ret = menelaus_add_irq_work(MENELAUS_MMC_S2D1_IRQ,
+ menelaus_mmc_cd_work);
+
+ return ret;
+}
+EXPORT_SYMBOL(menelaus_register_mmc_callback);
+
+void menelaus_unregister_mmc_callback(void)
+{
+ menelaus_remove_irq_work(MENELAUS_MMC_S1CD_IRQ);
+ menelaus_remove_irq_work(MENELAUS_MMC_S2CD_IRQ);
+ menelaus_remove_irq_work(MENELAUS_MMC_S1D1_IRQ);
+ menelaus_remove_irq_work(MENELAUS_MMC_S2D1_IRQ);
+
+ the_menelaus->mmc_callback = NULL;
+ the_menelaus->mmc_callback_data = 0;
+}
+EXPORT_SYMBOL(menelaus_unregister_mmc_callback);
+
+struct menelaus_vtg {
+ const char *name;
+ u8 vtg_reg;
+ u8 vtg_shift;
+ u8 vtg_bits;
+ u8 mode_reg;
+};
+
+struct menelaus_vtg_value {
+ u16 vtg;
+ u16 val;
+};
+
+static int menelaus_set_voltage(const struct menelaus_vtg *vtg, int mV,
+ int vtg_val, int mode)
+{
+ int val, ret;
+ struct i2c_client *c = the_menelaus->client;
+
+ mutex_lock(&the_menelaus->lock);
+ if (vtg == 0)
+ goto set_voltage;
+
+ ret = menelaus_read_reg(vtg->vtg_reg);
+ if (ret < 0)
+ goto out;
+ val = ret & ~(((1 << vtg->vtg_bits) - 1) << vtg->vtg_shift);
+ val |= vtg_val << vtg->vtg_shift;
+
+ dev_dbg(&c->dev, "Setting voltage '%s'"
+ "to %d mV (reg 0x%02x, val 0x%02x)\n",
+ vtg->name, mV, vtg->vtg_reg, val);
+
+ ret = menelaus_write_reg(vtg->vtg_reg, val);
+ if (ret < 0)
+ goto out;
+set_voltage:
+ ret = menelaus_write_reg(vtg->mode_reg, mode);
+out:
+ mutex_unlock(&the_menelaus->lock);
+ if (ret == 0) {
+ /* Wait for voltage to stabilize */
+ msleep(1);
+ }
+ return ret;
+}
+
+static int menelaus_get_vtg_value(int vtg, const struct menelaus_vtg_value *tbl,
+ int n)
+{
+ int i;
+
+ for (i = 0; i < n; i++, tbl++)
+ if (tbl->vtg == vtg)
+ return tbl->val;
+ return -EINVAL;
+}
+
+/*
+ * Vcore can be programmed in two ways:
+ * SW-controlled: Required voltage is programmed into VCORE_CTRL1
+ * HW-controlled: Required range (roof-floor) is programmed into VCORE_CTRL3
+ * and VCORE_CTRL4
+ *
+ * Call correct 'set' function accordingly
+ */
+
+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)
+{
+ 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("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",
+ 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);
+ i2c_set_clientdata(client, NULL);
+ the_menelaus = NULL;
+ return 0;
+}
+
+static struct i2c_driver menelaus_i2c_driver = {
+ .driver = {
+ .name = DRIVER_NAME,
+ },
+ .probe = menelaus_probe,
+ .remove = __exit_p(menelaus_remove),
+};
+
+static int __init menelaus_init(void)
+{
+ int res;
+
+ res = i2c_add_driver(&menelaus_i2c_driver);
+ if (res < 0) {
+ pr_err("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);