+++ /dev/null
-
-/*
- * 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 <linux/i2c/menelaus.h>
-
-#include <asm/mach-types.h>
-#include <asm/mach/irq.h>
-
-#include <mach/gpio.h>
-
-#define DRIVER_NAME "menelaus"
-
-
-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) {
- dev_err(&the_menelaus->client->dev, "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)
- dev_err(&the_menelaus->client->dev, "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 |= MCT_PIN_ST_S1_CD_ST;
-
- if (!(reg & 0x2))
- card_mask |= MCT_PIN_ST_S2_CD_ST;
-
- 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 |= MCT_CTRL1_S1_CMD_OD;
- else
- val &= ~MCT_CTRL1_S1_CMD_OD;
- } else {
- if (enable)
- val |= MCT_CTRL1_S2_CMD_OD;
- else
- val &= ~MCT_CTRL1_S2_CMD_OD;
- }
- 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 |= GPIO2_DIR_INPUT;
- if (enable)
- ret |= GPIO_CTRL_SLOTSELEN;
- else
- ret &= ~GPIO_CTRL_SLOTSELEN;
- ret = menelaus_write_reg(MENELAUS_GPIO_CTRL, ret);
-out:
- mutex_unlock(&the_menelaus->lock);
- return ret;
-}
-EXPORT_SYMBOL(menelaus_set_slot_sel);
-
-int menelaus_enable_slot(int slot, int enable)
-{
- int ret, val;
-
- mutex_lock(&the_menelaus->lock);
- ret = menelaus_read_reg(MENELAUS_MCT_CTRL3);
- if (ret < 0)
- goto out;
- val = ret;
- if (slot == 1) {
- if (enable)
- val |= MCT_CTRL3_SLOT1_EN;
- else
- val &= ~MCT_CTRL3_SLOT1_EN;
- } else {
- if (enable)
- val |= MCT_CTRL3_SLOT2_EN;
- else
- val &= MCT_CTRL3_SLOT2_EN;
- }
- ret = menelaus_write_reg(MENELAUS_MCT_CTRL3, val);
-
-out:
- mutex_unlock(&the_menelaus->lock);
- return ret;
-}
-EXPORT_SYMBOL(menelaus_enable_slot);
-
-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 |= MCT_CTRL2_S1CD_BUFEN | MCT_CTRL2_S1CD_DBEN;
- else
- val &= ~(MCT_CTRL2_S1CD_BUFEN | MCT_CTRL2_S1CD_DBEN);
- } else {
- if (cd_en)
- val |= MCT_CTRL2_S2CD_BUFEN | MCT_CTRL2_S2CD_BEN;
- else
- val &= ~(MCT_CTRL2_S2CD_BUFEN | MCT_CTRL2_S2CD_BEN);
- }
- 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 |= MCT_CTRL3_SLOT1_EN;
- else
- val &= ~MCT_CTRL3_SLOT1_EN;
- } else {
- int b;
-
- if (enable)
- val |= MCT_CTRL3_SLOT2_EN;
- else
- val &= ~MCT_CTRL3_SLOT2_EN;
- b = menelaus_read_reg(MENELAUS_MCT_CTRL2);
- b &= ~(MCT_CTRL2_VS2_SEL_D0 | MCT_CTRL2_VS2_SEL_D1);
- b |= power;
- ret = menelaus_write_reg(MENELAUS_MCT_CTRL2, b);
- if (ret < 0)
- goto out;
- }
- /* Disable autonomous shutdown */
- val &= ~(MCT_CTRL3_S1_AUTO_EN | MCT_CTRL3_S2_AUTO_EN);
- 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 |= (VCORE_CTRL1_HW_NSW | VCORE_CTRL1_BYP_COMP);
- 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 = (GPIO_CTRL_SLPCTLEN | GPIO3_DIR_INPUT);
- 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) {
- dev_err(&client->dev, "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);
-
- dev_info(&client->dev, "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 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)
-{
- return i2c_add_driver(&menelaus_i2c_driver);
-}
-
-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);
projects / linux-2.6-omap-h63xx.git / commitdiff