Signed-off-by: David Brownell <dbrownell@xxxxxxxxxxxxxxxxxxxxx>
Move twl4030-core to drivers/mfd from drivers/i2c/chips,
along with its Kconfig and Makefile help.
The intent here is: no functional change, match the patch
sent to LKML this morning (except, fix that spelling error
in the new Kconfig text).
Signed-off-by: David Brownell <dbrownell@xxxxxxxxxxxxxxxxxxxxx>
---
NOTE: minor weirdness. The twl403-pwrirq initializes earlier (?)
than before ... but "i2c_omap i2c_omap.1: controller timed out"
is the response to its first I2C request. So it bails, causing
twl4030_usb and then rtc_twl4030 request_irq() calls to fail, and
those drivers probe() calls fail.
But, for the first time in a long while, the USB host now enumerates
my Ethernet adapter!! So it's a net win in terms of overall behavior,
since I can now get the time from NTP (loss of RTC doesn't hurt).
Make the pwrirq code retry that first write (setting the mask to
the value the core already set it) ... and pwrirq comes up, RTC,
the transceiver glue. And USB can't enumerate that adapter. :(
drivers/i2c/chips/Kconfig | 6
drivers/i2c/chips/Makefile | 2
drivers/i2c/chips/twl4030-core.c | 1255 -------------------------------------
drivers/mfd/Kconfig | 14
drivers/mfd/Makefile | 2
drivers/mfd/twl4030-core.c | 1255 +++++++++++++++++++++++++++++++++++++
6 files changed, 1272 insertions(+), 1262 deletions(-)
--- a/drivers/i2c/chips/Kconfig
+++ b/drivers/i2c/chips/Kconfig
@@ -151,12 +151,6 @@ config GPIOEXPANDER_OMAP
If you say yes here you get support for I/O expander calls
to configure IrDA, Camera and audio devices.
-config TWL4030_CORE
- bool "TI's TWL4030 companion chip Core Driver Support"
- depends on I2C=y && (ARCH_OMAP24XX || ARCH_OMAP34XX)
- help
- Say yes here if you have TWL4030 chip on your board
-
config TWL4030_MADC
tristate "TWL4030 MADC Driver"
depends on TWL4030_CORE
--- a/drivers/i2c/chips/Makefile
+++ b/drivers/i2c/chips/Makefile
@@ -24,7 +24,7 @@ obj-$(CONFIG_GPIOEXPANDER_OMAP) += gpio_
obj-$(CONFIG_MENELAUS) += menelaus.o
obj-$(CONFIG_SENSORS_TSL2550) += tsl2550.o
obj-$(CONFIG_SENSORS_TSL2563) += tsl2563.o
-obj-$(CONFIG_TWL4030_CORE) += twl4030-core.o twl4030-pwrirq.o twl4030-power.o
+obj-$(CONFIG_TWL4030_CORE) += twl4030-pwrirq.o twl4030-power.o
obj-$(CONFIG_TWL4030_USB) += twl4030-usb.o
obj-$(CONFIG_TWL4030_POWEROFF) += twl4030-poweroff.o
obj-$(CONFIG_TWL4030_PWRBUTTON) += twl4030-pwrbutton.o
--- a/drivers/i2c/chips/twl4030-core.c
+++ /dev/null
@@ -1,1255 +0,0 @@
-/*
- * twl4030_core.c - driver for TWL4030/TPS659x0 PM and audio CODEC devices
- *
- * Copyright (C) 2005-2006 Texas Instruments, Inc.
- *
- * Modifications to defer interrupt handling to a kernel thread:
- * Copyright (C) 2006 MontaVista Software, Inc.
- *
- * Based on tlv320aic23.c:
- * Copyright (c) by Kai Svahn <kai.svahn@xxxxxxxxx>
- *
- * Code cleanup and modifications to IRQ handler.
- * by syed khasim <x0khasim@xxxxxx>
- *
- * 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/kernel_stat.h>
-#include <linux/init.h>
-#include <linux/mutex.h>
-#include <linux/interrupt.h>
-#include <linux/irq.h>
-#include <linux/random.h>
-#include <linux/kthread.h>
-#include <linux/platform_device.h>
-#include <linux/clk.h>
-
-#include <linux/i2c.h>
-#include <linux/i2c/twl4030.h>
-#include <linux/i2c/twl4030-gpio.h>
-#include <linux/i2c/twl4030-madc.h>
-#include <linux/i2c/twl4030-pwrirq.h>
-
-#define DRIVER_NAME "twl4030"
-
-#if defined(CONFIG_TWL4030_BCI_BATTERY) || \
- defined(CONFIG_TWL4030_BCI_BATTERY_MODUEL)
-#define twl_has_bci() true
-#else
-#define twl_has_bci() false
-#endif
-
-#if defined(CONFIG_KEYBOARD_TWL4030) || defined(CONFIG_KEYBOARD_TWL4030_MODULE)
-#define twl_has_keypad() true
-#else
-#define twl_has_keypad() false
-#endif
-
-#if defined(CONFIG_GPIO_TWL4030) || defined(CONFIG_GPIO_TWL4030_MODULE)
-#define twl_has_gpio() true
-#else
-#define twl_has_gpio() false
-#endif
-
-#if defined(CONFIG_TWL4030_MADC) || defined(CONFIG_TWL4030_MADC_MODULE)
-#define twl_has_madc() true
-#else
-#define twl_has_madc() false
-#endif
-
-#if defined(CONFIG_RTC_DRV_TWL4030) || defined(CONFIG_RTC_DRV_TWL4030_MODULE)
-#define twl_has_rtc() true
-#else
-#define twl_has_rtc() false
-#endif
-
-#if defined(CONFIG_TWL4030_USB) || defined(CONFIG_TWL4030_USB_MODULE)
-#define twl_has_usb() true
-#else
-#define twl_has_usb() false
-#endif
-
-static inline void activate_irq(int irq)
-{
-#ifdef CONFIG_ARM
- /* ARM requires an extra step to clear IRQ_NOREQUEST, which it
- * sets on behalf of every irq_chip. Also sets IRQ_NOPROBE.
- */
- set_irq_flags(irq, IRQF_VALID);
-#else
- /* same effect on other architectures */
- set_irq_noprobe(irq);
-#endif
-}
-
-/* Primary Interrupt Handler on TWL4030 Registers */
-
-/* Register Definitions */
-
-#define REG_PIH_ISR_P1 (0x1)
-#define REG_PIH_ISR_P2 (0x2)
-#define REG_PIH_SIR (0x3)
-
-/* Triton Core internal information (BEGIN) */
-
-/* Last - for index max*/
-#define TWL4030_MODULE_LAST TWL4030_MODULE_SECURED_REG
-
-#define TWL4030_NUM_SLAVES 4
-
-/* Slave address */
-#define TWL4030_SLAVENUM_NUM0 0x00
-#define TWL4030_SLAVENUM_NUM1 0x01
-#define TWL4030_SLAVENUM_NUM2 0x02
-#define TWL4030_SLAVENUM_NUM3 0x03
-
-/* Base Address defns */
-/* USB ID */
-#define TWL4030_BASEADD_USB 0x0000
-/* AUD ID */
-#define TWL4030_BASEADD_AUDIO_VOICE 0x0000
-#define TWL4030_BASEADD_GPIO 0x0098
-
-#define TWL4030_BASEADD_INTBR 0x0085
-#define TWL4030_BASEADD_PIH 0x0080
-#define TWL4030_BASEADD_TEST 0x004C
-/* AUX ID */
-#define TWL4030_BASEADD_INTERRUPTS 0x00B9
-#define TWL4030_BASEADD_LED 0x00EE
-#define TWL4030_BASEADD_MADC 0x0000
-#define TWL4030_BASEADD_MAIN_CHARGE 0x0074
-#define TWL4030_BASEADD_PRECHARGE 0x00AA
-#define TWL4030_BASEADD_PWM0 0x00F8
-#define TWL4030_BASEADD_PWM1 0x00FB
-#define TWL4030_BASEADD_PWMA 0x00EF
-#define TWL4030_BASEADD_PWMB 0x00F1
-#define TWL4030_BASEADD_KEYPAD 0x00D2
-/* POWER ID */
-#define TWL4030_BASEADD_BACKUP 0x0014
-#define TWL4030_BASEADD_INT 0x002E
-#define TWL4030_BASEADD_PM_MASTER 0x0036
-#define TWL4030_BASEADD_PM_RECEIVER 0x005B
-#define TWL4030_BASEADD_RTC 0x001C
-#define TWL4030_BASEADD_SECURED_REG 0x0000
-
-/* TWL4030 BCI registers */
-#define TWL4030_INTERRUPTS_BCIIMR1A 0x2
-#define TWL4030_INTERRUPTS_BCIIMR2A 0x3
-#define TWL4030_INTERRUPTS_BCIIMR1B 0x6
-#define TWL4030_INTERRUPTS_BCIIMR2B 0x7
-#define TWL4030_INTERRUPTS_BCIISR1A 0x0
-#define TWL4030_INTERRUPTS_BCIISR2A 0x1
-#define TWL4030_INTERRUPTS_BCIISR1B 0x4
-#define TWL4030_INTERRUPTS_BCIISR2B 0x5
-
-/* TWL4030 keypad registers */
-#define TWL4030_KEYPAD_KEYP_IMR1 0x12
-#define TWL4030_KEYPAD_KEYP_IMR2 0x14
-#define TWL4030_KEYPAD_KEYP_ISR1 0x11
-#define TWL4030_KEYPAD_KEYP_ISR2 0x13
-
-
-/* Triton Core internal information (END) */
-
-/* Few power values */
-#define R_CFG_BOOT 0x05
-#define R_PROTECT_KEY 0x0E
-
-/* access control */
-#define KEY_UNLOCK1 0xce
-#define KEY_UNLOCK2 0xec
-#define KEY_LOCK 0x00
-
-#define HFCLK_FREQ_19p2_MHZ (1 << 0)
-#define HFCLK_FREQ_26_MHZ (2 << 0)
-#define HFCLK_FREQ_38p4_MHZ (3 << 0)
-#define HIGH_PERF_SQ (1 << 3)
-
-/* SIH_CTRL registers that aren't defined elsewhere */
-#define TWL4030_INTERRUPTS_BCISIHCTRL 0x0d
-#define TWL4030_MADC_MADC_SIH_CTRL 0x67
-#define TWL4030_KEYPAD_KEYP_SIH_CTRL 0x17
-
-#define TWL4030_SIH_CTRL_COR_MASK (1 << 2)
-
-/**
- * struct twl4030_mod_iregs - TWL module IMR/ISR regs to mask/clear at init
- * @mod_no: TWL4030 module number (e.g., TWL4030_MODULE_GPIO)
- * @sih_ctrl: address of module SIH_CTRL register
- * @reg_cnt: number of IMR/ISR regs
- * @imrs: pointer to array of TWL module interrupt mask register indices
- * @isrs: pointer to array of TWL module interrupt status register indices
- *
- * Ties together TWL4030 modules and lists of IMR/ISR registers to mask/clear
- * during twl_init_irq().
- */
-struct twl4030_mod_iregs {
- const u8 mod_no;
- const u8 sih_ctrl;
- const u8 reg_cnt;
- const u8 *imrs;
- const u8 *isrs;
-};
-
-/* TWL4030 INT module interrupt mask registers */
-static const u8 __initconst twl4030_int_imr_regs[] = {
- TWL4030_INT_PWR_IMR1,
- TWL4030_INT_PWR_IMR2,
-};
-
-/* TWL4030 INT module interrupt status registers */
-static const u8 __initconst twl4030_int_isr_regs[] = {
- TWL4030_INT_PWR_ISR1,
- TWL4030_INT_PWR_ISR2,
-};
-
-/* TWL4030 INTERRUPTS module interrupt mask registers */
-static const u8 __initconst twl4030_interrupts_imr_regs[] = {
- TWL4030_INTERRUPTS_BCIIMR1A,
- TWL4030_INTERRUPTS_BCIIMR1B,
- TWL4030_INTERRUPTS_BCIIMR2A,
- TWL4030_INTERRUPTS_BCIIMR2B,
-};
-
-/* TWL4030 INTERRUPTS module interrupt status registers */
-static const u8 __initconst twl4030_interrupts_isr_regs[] = {
- TWL4030_INTERRUPTS_BCIISR1A,
- TWL4030_INTERRUPTS_BCIISR1B,
- TWL4030_INTERRUPTS_BCIISR2A,
- TWL4030_INTERRUPTS_BCIISR2B,
-};
-
-/* TWL4030 MADC module interrupt mask registers */
-static const u8 __initconst twl4030_madc_imr_regs[] = {
- TWL4030_MADC_IMR1,
- TWL4030_MADC_IMR2,
-};
-
-/* TWL4030 MADC module interrupt status registers */
-static const u8 __initconst twl4030_madc_isr_regs[] = {
- TWL4030_MADC_ISR1,
- TWL4030_MADC_ISR2,
-};
-
-/* TWL4030 keypad module interrupt mask registers */
-static const u8 __initconst twl4030_keypad_imr_regs[] = {
- TWL4030_KEYPAD_KEYP_IMR1,
- TWL4030_KEYPAD_KEYP_IMR2,
-};
-
-/* TWL4030 keypad module interrupt status registers */
-static const u8 __initconst twl4030_keypad_isr_regs[] = {
- TWL4030_KEYPAD_KEYP_ISR1,
- TWL4030_KEYPAD_KEYP_ISR2,
-};
-
-/* TWL4030 GPIO module interrupt mask registers */
-static const u8 __initconst twl4030_gpio_imr_regs[] = {
- REG_GPIO_IMR1A,
- REG_GPIO_IMR1B,
- REG_GPIO_IMR2A,
- REG_GPIO_IMR2B,
- REG_GPIO_IMR3A,
- REG_GPIO_IMR3B,
-};
-
-/* TWL4030 GPIO module interrupt status registers */
-static const u8 __initconst twl4030_gpio_isr_regs[] = {
- REG_GPIO_ISR1A,
- REG_GPIO_ISR1B,
- REG_GPIO_ISR2A,
- REG_GPIO_ISR2B,
- REG_GPIO_ISR3A,
- REG_GPIO_ISR3B,
-};
-
-/* TWL4030 modules that have IMR/ISR registers that must be masked/cleared */
-static const struct twl4030_mod_iregs __initconst twl4030_mod_regs[] = {
- {
- .mod_no = TWL4030_MODULE_INT,
- .sih_ctrl = TWL4030_INT_PWR_SIH_CTRL,
- .reg_cnt = ARRAY_SIZE(twl4030_int_imr_regs),
- .imrs = twl4030_int_imr_regs,
- .isrs = twl4030_int_isr_regs,
- },
- {
- .mod_no = TWL4030_MODULE_INTERRUPTS,
- .sih_ctrl = TWL4030_INTERRUPTS_BCISIHCTRL,
- .reg_cnt = ARRAY_SIZE(twl4030_interrupts_imr_regs),
- .imrs = twl4030_interrupts_imr_regs,
- .isrs = twl4030_interrupts_isr_regs,
- },
- {
- .mod_no = TWL4030_MODULE_MADC,
- .sih_ctrl = TWL4030_MADC_MADC_SIH_CTRL,
- .reg_cnt = ARRAY_SIZE(twl4030_madc_imr_regs),
- .imrs = twl4030_madc_imr_regs,
- .isrs = twl4030_madc_isr_regs,
- },
- {
- .mod_no = TWL4030_MODULE_KEYPAD,
- .sih_ctrl = TWL4030_KEYPAD_KEYP_SIH_CTRL,
- .reg_cnt = ARRAY_SIZE(twl4030_keypad_imr_regs),
- .imrs = twl4030_keypad_imr_regs,
- .isrs = twl4030_keypad_isr_regs,
- },
- {
- .mod_no = TWL4030_MODULE_GPIO,
- .sih_ctrl = REG_GPIO_SIH_CTRL,
- .reg_cnt = ARRAY_SIZE(twl4030_gpio_imr_regs),
- .imrs = twl4030_gpio_imr_regs,
- .isrs = twl4030_gpio_isr_regs,
- },
-};
-
-
-/* Data Structures */
-/* To have info on T2 IRQ substem activated or not */
-static struct completion irq_event;
-
-/* Structure to define on TWL4030 Slave ID */
-struct twl4030_client {
- struct i2c_client *client;
- u8 address;
- bool inuse;
-
- /* max numb of i2c_msg required is for read =2 */
- struct i2c_msg xfer_msg[2];
-
- /* To lock access to xfer_msg */
- struct mutex xfer_lock;
-};
-
-/* Module Mapping */
-struct twl4030mapping {
- unsigned char sid; /* Slave ID */
- unsigned char base; /* base address */
-};
-
-/* mapping the module id to slave id and base address */
-static struct twl4030mapping twl4030_map[TWL4030_MODULE_LAST + 1] = {
- { TWL4030_SLAVENUM_NUM0, TWL4030_BASEADD_USB },
- { TWL4030_SLAVENUM_NUM1, TWL4030_BASEADD_AUDIO_VOICE },
- { TWL4030_SLAVENUM_NUM1, TWL4030_BASEADD_GPIO },
- { TWL4030_SLAVENUM_NUM1, TWL4030_BASEADD_INTBR },
- { TWL4030_SLAVENUM_NUM1, TWL4030_BASEADD_PIH },
- { TWL4030_SLAVENUM_NUM1, TWL4030_BASEADD_TEST },
- { TWL4030_SLAVENUM_NUM2, TWL4030_BASEADD_KEYPAD },
- { TWL4030_SLAVENUM_NUM2, TWL4030_BASEADD_MADC },
- { TWL4030_SLAVENUM_NUM2, TWL4030_BASEADD_INTERRUPTS },
- { TWL4030_SLAVENUM_NUM2, TWL4030_BASEADD_LED },
- { TWL4030_SLAVENUM_NUM2, TWL4030_BASEADD_MAIN_CHARGE },
- { TWL4030_SLAVENUM_NUM2, TWL4030_BASEADD_PRECHARGE },
- { TWL4030_SLAVENUM_NUM2, TWL4030_BASEADD_PWM0 },
- { TWL4030_SLAVENUM_NUM2, TWL4030_BASEADD_PWM1 },
- { TWL4030_SLAVENUM_NUM2, TWL4030_BASEADD_PWMA },
- { TWL4030_SLAVENUM_NUM2, TWL4030_BASEADD_PWMB },
- { TWL4030_SLAVENUM_NUM3, TWL4030_BASEADD_BACKUP },
- { TWL4030_SLAVENUM_NUM3, TWL4030_BASEADD_INT },
- { TWL4030_SLAVENUM_NUM3, TWL4030_BASEADD_PM_MASTER },
- { TWL4030_SLAVENUM_NUM3, TWL4030_BASEADD_PM_RECEIVER },
- { TWL4030_SLAVENUM_NUM3, TWL4030_BASEADD_RTC },
- { TWL4030_SLAVENUM_NUM3, TWL4030_BASEADD_SECURED_REG },
-};
-
-static struct twl4030_client twl4030_modules[TWL4030_NUM_SLAVES];
-
-/*
- * TWL4030 doesn't have PIH mask, hence dummy function for mask
- * and unmask.
- */
-
-static void twl4030_i2c_ackirq(unsigned int irq)
-{
-}
-
-static void twl4030_i2c_disableint(unsigned int irq)
-{
-}
-
-static void twl4030_i2c_enableint(unsigned int irq)
-{
-}
-
-/* information for processing in the Work Item */
-static struct irq_chip twl4030_irq_chip = {
- .name = "twl4030",
- .ack = twl4030_i2c_ackirq,
- .mask = twl4030_i2c_disableint,
- .unmask = twl4030_i2c_enableint,
-};
-
-/* Global Functions */
-
-/**
- * twl4030_i2c_write - Writes a n bit register in TWL4030
- * @mod_no: module number
- * @value: an array of num_bytes+1 containing data to write
- * @reg: register address (just offset will do)
- * @num_bytes: number of bytes to transfer
- *
- * IMPORTANT: for 'value' parameter: Allocate value num_bytes+1 and
- * valid data starts at Offset 1.
- *
- * Returns the result of operation - 0 is success
- */
-int twl4030_i2c_write(u8 mod_no, u8 *value, u8 reg, u8 num_bytes)
-{
- int ret;
- int sid;
- struct twl4030_client *twl;
- struct i2c_msg *msg;
-
- if (unlikely(mod_no > TWL4030_MODULE_LAST)) {
- pr_err("%s: invalid module number %d\n", DRIVER_NAME, mod_no);
- return -EPERM;
- }
- sid = twl4030_map[mod_no].sid;
- twl = &twl4030_modules[sid];
-
- if (unlikely(!twl->inuse)) {
- pr_err("%s: client %d is not initialized\n", DRIVER_NAME, sid);
- return -EPERM;
- }
- mutex_lock(&twl->xfer_lock);
- /*
- * [MSG1]: fill the register address data
- * fill the data Tx buffer
- */
- msg = &twl->xfer_msg[0];
- msg->addr = twl->address;
- msg->len = num_bytes + 1;
- msg->flags = 0;
- msg->buf = value;
- /* over write the first byte of buffer with the register address */
- *value = twl4030_map[mod_no].base + reg;
- ret = i2c_transfer(twl->client->adapter, twl->xfer_msg, 1);
- mutex_unlock(&twl->xfer_lock);
-
- /* i2cTransfer returns num messages.translate it pls.. */
- if (ret >= 0)
- ret = 0;
- return ret;
-}
-EXPORT_SYMBOL(twl4030_i2c_write);
-
-/**
- * twl4030_i2c_read - Reads a n bit register in TWL4030
- * @mod_no: module number
- * @value: an array of num_bytes containing data to be read
- * @reg: register address (just offset will do)
- * @num_bytes: number of bytes to transfer
- *
- * Returns result of operation - num_bytes is success else failure.
- */
-int twl4030_i2c_read(u8 mod_no, u8 *value, u8 reg, u8 num_bytes)
-{
- int ret;
- u8 val;
- int sid;
- struct twl4030_client *twl;
- struct i2c_msg *msg;
-
- if (unlikely(mod_no > TWL4030_MODULE_LAST)) {
- pr_err("%s: invalid module number %d\n", DRIVER_NAME, mod_no);
- return -EPERM;
- }
- sid = twl4030_map[mod_no].sid;
- twl = &twl4030_modules[sid];
-
- if (unlikely(!twl->inuse)) {
- pr_err("%s: client %d is not initialized\n", DRIVER_NAME, sid);
- return -EPERM;
- }
- mutex_lock(&twl->xfer_lock);
- /* [MSG1] fill the register address data */
- msg = &twl->xfer_msg[0];
- msg->addr = twl->address;
- msg->len = 1;
- msg->flags = 0; /* Read the register value */
- val = twl4030_map[mod_no].base + reg;
- msg->buf = &val;
- /* [MSG2] fill the data rx buffer */
- msg = &twl->xfer_msg[1];
- msg->addr = twl->address;
- msg->flags = I2C_M_RD; /* Read the register value */
- msg->len = num_bytes; /* only n bytes */
- msg->buf = value;
- ret = i2c_transfer(twl->client->adapter, twl->xfer_msg, 2);
- mutex_unlock(&twl->xfer_lock);
-
- /* i2cTransfer returns num messages.translate it pls.. */
- if (ret >= 0)
- ret = 0;
- return ret;
-}
-EXPORT_SYMBOL(twl4030_i2c_read);
-
-/**
- * twl4030_i2c_write_u8 - Writes a 8 bit register in TWL4030
- * @mod_no: module number
- * @value: the value to be written 8 bit
- * @reg: register address (just offset will do)
- *
- * Returns result of operation - 0 is success
- */
-int twl4030_i2c_write_u8(u8 mod_no, u8 value, u8 reg)
-{
-
- /* 2 bytes offset 1 contains the data offset 0 is used by i2c_write */
- u8 temp_buffer[2] = { 0 };
- /* offset 1 contains the data */
- temp_buffer[1] = value;
- return twl4030_i2c_write(mod_no, temp_buffer, reg, 1);
-}
-EXPORT_SYMBOL(twl4030_i2c_write_u8);
-
-/**
- * twl4030_i2c_read_u8 - Reads a 8 bit register from TWL4030
- * @mod_no: module number
- * @value: the value read 8 bit
- * @reg: register address (just offset will do)
- *
- * Returns result of operation - 0 is success
- */
-int twl4030_i2c_read_u8(u8 mod_no, u8 *value, u8 reg)
-{
- return twl4030_i2c_read(mod_no, value, reg, 1);
-}
-EXPORT_SYMBOL(twl4030_i2c_read_u8);
-
-/* Helper Functions */
-
-/*
- * do_twl4030_module_irq() is the desc->handle method for each of the twl4030
- * module interrupts. It executes in kernel thread context.
- * On entry, cpu interrupts are disabled.
- */
-static void do_twl4030_module_irq(unsigned int irq, irq_desc_t *desc)
-{
- struct irqaction *action;
- const unsigned int cpu = smp_processor_id();
-
- /*
- * Earlier this was desc->triggered = 1;
- */
- desc->status |= IRQ_LEVEL;
-
- /*
- * The desc->handle method would normally call the desc->chip->ack
- * method here, but we won't bother since our ack method is NULL.
- */
-
- if (!desc->depth) {
- kstat_cpu(cpu).irqs[irq]++;
-
- action = desc->action;
- if (action) {
- int ret;
- int status = 0;
- int retval = 0;
-
- local_irq_enable();
-
- do {
- /* Call the ISR with cpu interrupts enabled */
- ret = action->handler(irq, action->dev_id);
- if (ret == IRQ_HANDLED)
- status |= action->flags;
- retval |= ret;
- action = action->next;
- } while (action);
-
- if (status & IRQF_SAMPLE_RANDOM)
- add_interrupt_randomness(irq);
-
- local_irq_disable();
-
- if (retval != IRQ_HANDLED)
- printk(KERN_ERR "ISR for TWL4030 module"
- " irq %d can't handle interrupt\n",
- irq);
-
- /*
- * Here is where we should call the unmask method, but
- * again we won't bother since it is NULL.
- */
- } else
- printk(KERN_CRIT "TWL4030 module irq %d has no ISR"
- " but can't be masked!\n", irq);
- } else
- printk(KERN_CRIT "TWL4030 module irq %d is disabled but can't"
- " be masked!\n", irq);
-}
-
-static unsigned twl4030_irq_base;
-
-/*
- * twl4030_irq_thread() runs as a kernel thread. It queries the twl4030
- * interrupt controller to see which modules are generating interrupt requests
- * and then calls the desc->handle method for each module requesting service.
- */
-static int twl4030_irq_thread(void *data)
-{
- long irq = (long)data;
- irq_desc_t *desc = irq_desc + irq;
- static unsigned i2c_errors;
- const static unsigned max_i2c_errors = 100;
-
- daemonize("twl4030-irq");
- current->flags |= PF_NOFREEZE;
-
- while (!kthread_should_stop()) {
- int ret;
- int module_irq;
- u8 pih_isr;
-
- wait_for_completion_interruptible(&irq_event);
-
- ret = twl4030_i2c_read_u8(TWL4030_MODULE_PIH, &pih_isr,
- REG_PIH_ISR_P1);
- if (ret) {
- printk(KERN_WARNING "I2C error %d while reading TWL4030"
- " PIH ISR register.\n", ret);
- if (++i2c_errors >= max_i2c_errors) {
- printk(KERN_ERR "Maximum I2C error count"
- " exceeded. Terminating %s.\n",
- __func__);
- break;
- }
- continue;
- }
-
- for (module_irq = twl4030_irq_base; 0 != pih_isr;
- pih_isr >>= 1, module_irq++) {
- if (pih_isr & 0x1) {
- irq_desc_t *d = irq_desc + module_irq;
-
- local_irq_disable();
-
- d->handle_irq(module_irq, d);
-
- local_irq_enable();
- }
- }
-
- desc->chip->unmask(irq);
- }
-
- return 0;
-}
-
-/*
- * do_twl4030_irq() is the desc->handle method for the twl4030 interrupt.
- * This is a chained interrupt, so there is no desc->action method for it.
- * Now we need to query the interrupt controller in the twl4030 to determine
- * which module is generating the interrupt request. However, we can't do i2c
- * transactions in interrupt context, so we must defer that work to a kernel
- * thread. All we do here is acknowledge and mask the interrupt and wakeup
- * the kernel thread.
- */
-static void do_twl4030_irq(unsigned int irq, irq_desc_t *desc)
-{
- const unsigned int cpu = smp_processor_id();
-
- /*
- * Earlier this was desc->triggered = 1;
- */
- desc->status |= IRQ_LEVEL;
-
- /*
- * Acknowledge, clear _AND_ disable the interrupt.
- */
- desc->chip->ack(irq);
-
- if (!desc->depth) {
- kstat_cpu(cpu).irqs[irq]++;
-
- complete(&irq_event);
- }
-}
-
-static int add_children(struct twl4030_platform_data *pdata)
-{
- struct platform_device *pdev = NULL;
- struct twl4030_client *twl = NULL;
- int status = 0;
-
- if (twl_has_bci() && pdata->bci) {
- twl = &twl4030_modules[TWL4030_SLAVENUM_NUM3];
-
- pdev = platform_device_alloc("twl4030_bci", -1);
- if (!pdev) {
- pr_debug("%s: can't alloc bci dev\n", DRIVER_NAME);
- status = -ENOMEM;
- goto err;
- }
-
- if (status == 0) {
- pdev->dev.parent = &twl->client->dev;
- status = platform_device_add_data(pdev, pdata->bci,
- sizeof(*pdata->bci));
- if (status < 0) {
- dev_dbg(&twl->client->dev,
- "can't add bci data, %d\n",
- status);
- goto err;
- }
- }
-
- if (status == 0) {
- struct resource r = {
- .start = TWL4030_PWRIRQ_CHG_PRES,
- .flags = IORESOURCE_IRQ,
- };
-
- status = platform_device_add_resources(pdev, &r, 1);
- }
-
- if (status == 0)
- status = platform_device_add(pdev);
-
- if (status < 0) {
- platform_device_put(pdev);
- dev_dbg(&twl->client->dev,
- "can't create bci dev, %d\n",
- status);
- goto err;
- }
- }
-
- if (twl_has_gpio() && pdata->gpio) {
- twl = &twl4030_modules[TWL4030_SLAVENUM_NUM1];
-
- pdev = platform_device_alloc("twl4030_gpio", -1);
- if (!pdev) {
- pr_debug("%s: can't alloc gpio dev\n", DRIVER_NAME);
- status = -ENOMEM;
- goto err;
- }
-
- /* more driver model init */
- if (status == 0) {
- pdev->dev.parent = &twl->client->dev;
- /* device_init_wakeup(&pdev->dev, 1); */
-
- status = platform_device_add_data(pdev, pdata->gpio,
- sizeof(*pdata->gpio));
- if (status < 0) {
- dev_dbg(&twl->client->dev,
- "can't add gpio data, %d\n",
- status);
- goto err;
- }
- }
-
- /* GPIO module IRQ */
- if (status == 0) {
- struct resource r = {
- .start = pdata->irq_base + 0,
- .flags = IORESOURCE_IRQ,
- };
-
- status = platform_device_add_resources(pdev, &r, 1);
- }
-
- if (status == 0)
- status = platform_device_add(pdev);
-
- if (status < 0) {
- platform_device_put(pdev);
- dev_dbg(&twl->client->dev,
- "can't create gpio dev, %d\n",
- status);
- goto err;
- }
- }
-
- if (twl_has_keypad() && pdata->keypad) {
- pdev = platform_device_alloc("twl4030_keypad", -1);
- if (pdev) {
- twl = &twl4030_modules[TWL4030_SLAVENUM_NUM2];
- pdev->dev.parent = &twl->client->dev;
- device_init_wakeup(&pdev->dev, 1);
- status = platform_device_add_data(pdev, pdata->keypad,
- sizeof(*pdata->keypad));
- if (status < 0) {
- dev_dbg(&twl->client->dev,
- "can't add keypad data, %d\n",
- status);
- platform_device_put(pdev);
- goto err;
- }
- status = platform_device_add(pdev);
- if (status < 0) {
- platform_device_put(pdev);
- dev_dbg(&twl->client->dev,
- "can't create keypad dev, %d\n",
- status);
- goto err;
- }
- } else {
- pr_debug("%s: can't alloc keypad dev\n", DRIVER_NAME);
- status = -ENOMEM;
- goto err;
- }
- }
-
- if (twl_has_madc() && pdata->madc) {
- pdev = platform_device_alloc("twl4030_madc", -1);
- if (pdev) {
- twl = &twl4030_modules[TWL4030_SLAVENUM_NUM2];
- pdev->dev.parent = &twl->client->dev;
- device_init_wakeup(&pdev->dev, 1);
- status = platform_device_add_data(pdev, pdata->madc,
- sizeof(*pdata->madc));
- if (status < 0) {
- platform_device_put(pdev);
- dev_dbg(&twl->client->dev,
- "can't add madc data, %d\n",
- status);
- goto err;
- }
- status = platform_device_add(pdev);
- if (status < 0) {
- platform_device_put(pdev);
- dev_dbg(&twl->client->dev,
- "can't create madc dev, %d\n",
- status);
- goto err;
- }
- } else {
- pr_debug("%s: can't alloc madc dev\n", DRIVER_NAME);
- status = -ENOMEM;
- goto err;
- }
- }
-
- if (twl_has_rtc()) {
- twl = &twl4030_modules[TWL4030_SLAVENUM_NUM3];
-
- pdev = platform_device_alloc("twl4030_rtc", -1);
- if (!pdev) {
- pr_debug("%s: can't alloc rtc dev\n", DRIVER_NAME);
- status = -ENOMEM;
- } else {
- pdev->dev.parent = &twl->client->dev;
- device_init_wakeup(&pdev->dev, 1);
- }
-
- /*
- * REVISIT platform_data here currently might use of
- * "msecure" line ... but for now we just expect board
- * setup to tell the chip "we are secure" at all times.
- * Eventually, Linux might become more aware of such
- * HW security concerns, and "least privilege".
- */
-
- /* RTC module IRQ */
- if (status == 0) {
- struct resource r = {
- /* REVISIT don't hard-wire this stuff */
- .start = TWL4030_PWRIRQ_RTC,
- .flags = IORESOURCE_IRQ,
- };
-
- status = platform_device_add_resources(pdev, &r, 1);
- }
-
- if (status == 0)
- status = platform_device_add(pdev);
-
- if (status < 0) {
- platform_device_put(pdev);
- dev_dbg(&twl->client->dev,
- "can't create rtc dev, %d\n",
- status);
- goto err;
- }
- }
-
- if (twl_has_usb() && pdata->usb) {
- twl = &twl4030_modules[TWL4030_SLAVENUM_NUM0];
-
- pdev = platform_device_alloc("twl4030_usb", -1);
- if (!pdev) {
- pr_debug("%s: can't alloc usb dev\n", DRIVER_NAME);
- status = -ENOMEM;
- goto err;
- }
-
- if (status == 0) {
- pdev->dev.parent = &twl->client->dev;
- device_init_wakeup(&pdev->dev, 1);
- status = platform_device_add_data(pdev, pdata->usb,
- sizeof(*pdata->usb));
- if (status < 0) {
- platform_device_put(pdev);
- dev_dbg(&twl->client->dev,
- "can't add usb data, %d\n",
- status);
- goto err;
- }
- }
-
- if (status == 0) {
- struct resource r = {
- .start = TWL4030_PWRIRQ_USB_PRES,
- .flags = IORESOURCE_IRQ,
- };
-
- status = platform_device_add_resources(pdev, &r, 1);
- }
-
- if (status == 0)
- status = platform_device_add(pdev);
-
- if (status < 0) {
- platform_device_put(pdev);
- dev_dbg(&twl->client->dev,
- "can't create usb dev, %d\n",
- status);
- }
- }
-
-err:
- if (status)
- pr_err("failed to add twl4030's children (status %d)\n", status);
- return status;
-}
-
-static struct task_struct * __init start_twl4030_irq_thread(long irq)
-{
- struct task_struct *thread;
-
- init_completion(&irq_event);
- thread = kthread_run(twl4030_irq_thread, (void *)irq,
- "twl4030 irq %ld", irq);
- if (!thread)
- pr_err("%s: could not create twl4030 irq %ld thread!\n",
- DRIVER_NAME, irq);
-
- return thread;
-}
-
-/*
- * These three functions should be part of Voltage frame work
- * added here to complete the functionality for now.
- */
-static int __init protect_pm_master(void)
-{
- int e = 0;
-
- e = twl4030_i2c_write_u8(TWL4030_MODULE_PM_MASTER, KEY_LOCK,
- R_PROTECT_KEY);
- return e;
-}
-
-static int __init unprotect_pm_master(void)
-{
- int e = 0;
-
- e |= twl4030_i2c_write_u8(TWL4030_MODULE_PM_MASTER, KEY_UNLOCK1,
- R_PROTECT_KEY);
- e |= twl4030_i2c_write_u8(TWL4030_MODULE_PM_MASTER, KEY_UNLOCK2,
- R_PROTECT_KEY);
- return e;
-}
-
-static int __init power_companion_init(void)
-{
- int e = 0;
- struct clk *osc;
- u32 rate;
- u8 ctrl = HFCLK_FREQ_26_MHZ;
-
-#if defined(CONFIG_ARCH_OMAP2) || defined(CONFIG_ARCH_OMAP3)
- if (cpu_is_omap2430())
- osc = clk_get(NULL, "osc_ck");
- else
- osc = clk_get(NULL, "osc_sys_ck");
-#else
- osc = ERR_PTR(-EIO);
-#endif
- if (IS_ERR(osc)) {
- printk(KERN_WARNING "Skipping twl4030 internal clock init and "
- "using bootloader value (unknown osc rate)\n");
- return 0;
- }
-
- rate = clk_get_rate(osc);
- clk_put(osc);
-
- switch (rate) {
- case 19200000:
- ctrl = HFCLK_FREQ_19p2_MHZ;
- break;
- case 26000000:
- ctrl = HFCLK_FREQ_26_MHZ;
- break;
- case 38400000:
- ctrl = HFCLK_FREQ_38p4_MHZ;
- break;
- }
-
- ctrl |= HIGH_PERF_SQ;
- e |= unprotect_pm_master();
- /* effect->MADC+USB ck en */
- e |= twl4030_i2c_write_u8(TWL4030_MODULE_PM_MASTER, ctrl, R_CFG_BOOT);
- e |= protect_pm_master();
-
- return e;
-}
-
-/**
- * twl4030_i2c_clear_isr - clear TWL4030 SIH ISR regs via read + write
- * @mod_no: TWL4030 module number
- * @reg: register index to clear
- * @cor: value of the <module>_SIH_CTRL.COR bit (1 or 0)
- *
- * Either reads (cor == 1) or writes (cor == 0) to a TWL4030 interrupt
- * status register to ensure that any prior interrupts are cleared.
- * Returns the status from the I2C read operation.
- */
-static int __init twl4030_i2c_clear_isr(u8 mod_no, u8 reg, u8 cor)
-{
- u8 tmp;
-
- return (cor) ? twl4030_i2c_read_u8(mod_no, &tmp, reg) :
- twl4030_i2c_write_u8(mod_no, 0xff, reg);
-}
-
-/**
- * twl4030_read_cor_bit - are TWL module ISRs cleared by reads or writes?
- * @mod_no: TWL4030 module number
- * @reg: register index to clear
- *
- * Returns 1 if the TWL4030 SIH interrupt status registers (ISRs) for
- * the specified TWL module are cleared by reads, or 0 if cleared by
- * writes.
- */
-static int twl4030_read_cor_bit(u8 mod_no, u8 reg)
-{
- u8 tmp = 0;
-
- WARN_ON(twl4030_i2c_read_u8(mod_no, &tmp, reg) < 0);
-
- tmp &= TWL4030_SIH_CTRL_COR_MASK;
- tmp >>= __ffs(TWL4030_SIH_CTRL_COR_MASK);
-
- return tmp;
-}
-
-/**
- * twl4030_mask_clear_intrs - mask and clear all TWL4030 interrupts
- * @t: pointer to twl4030_mod_iregs array
- * @t_sz: ARRAY_SIZE(t) (starting at 1)
- *
- * Mask all TWL4030 interrupt mask registers (IMRs) and clear all
- * interrupt status registers (ISRs). No return value, but will WARN if
- * any I2C operations fail.
- */
-static void __init twl4030_mask_clear_intrs(const struct twl4030_mod_iregs *t,
- const u8 t_sz)
-{
- int i, j;
-
- /*
- * N.B. - further efficiency is possible here. Eight I2C
- * operations on BCI and GPIO modules are avoidable if I2C
- * burst read/write transactions were implemented. Would
- * probably save about 1ms of boot time and a small amount of
- * power.
- */
- for (i = 0; i < t_sz; i++) {
- const struct twl4030_mod_iregs tmr = t[i];
- int cor;
-
- /* Are ISRs cleared by reads or writes? */
- cor = twl4030_read_cor_bit(tmr.mod_no, tmr.sih_ctrl);
- WARN_ON(cor < 0);
-
- for (j = 0; j < tmr.reg_cnt; j++) {
-
- /* Mask interrupts at the TWL4030 */
- WARN_ON(twl4030_i2c_write_u8(tmr.mod_no, 0xff,
- tmr.imrs[j]) < 0);
-
- /* Clear TWL4030 ISRs */
- WARN_ON(twl4030_i2c_clear_isr(tmr.mod_no,
- tmr.isrs[j], cor) < 0);
- }
- }
-
- return;
-}
-
-
-static void twl_init_irq(int irq_num, unsigned irq_base, unsigned irq_end)
-{
- int i;
- int res = 0;
- char *msg = "Unable to register interrupt subsystem";
-
- /*
- * Mask and clear all TWL4030 interrupts since initially we do
- * not have any TWL4030 module interrupt handlers present
- */
- twl4030_mask_clear_intrs(twl4030_mod_regs,
- ARRAY_SIZE(twl4030_mod_regs));
-
- twl4030_irq_base = irq_base;
-
- /* install an irq handler for each of the PIH modules */
- for (i = irq_base; i < irq_end; i++) {
- set_irq_chip_and_handler(i, &twl4030_irq_chip,
- do_twl4030_module_irq);
- activate_irq(i);
- }
-
- /* install an irq handler to demultiplex the TWL4030 interrupt */
- set_irq_data(irq_num, start_twl4030_irq_thread(irq_num));
- set_irq_type(irq_num, IRQ_TYPE_EDGE_FALLING);
- set_irq_chained_handler(irq_num, do_twl4030_irq);
-
- res = power_companion_init();
- if (res < 0)
- pr_err("%s: %s[%d]\n", DRIVER_NAME, msg, res);
-}
-
-/*----------------------------------------------------------------------*/
-
-static int twl4030_remove(struct i2c_client *client)
-{
- unsigned i;
-
- /* FIXME undo twl_init_irq() */
- if (twl4030_irq_base) {
- dev_err(&client->dev, "can't yet clean up IRQs?\n");
- return -ENOSYS;
- }
-
- for (i = 0; i < TWL4030_NUM_SLAVES; i++) {
- struct twl4030_client *twl = &twl4030_modules[i];
-
- if (twl->client && twl->client != client)
- i2c_unregister_device(twl->client);
- twl4030_modules[i].client = NULL;
- twl4030_modules[i].inuse = false;
- }
- return 0;
-}
-
-/* NOTE: this driver only handles a single twl4030/tps659x0 chip */
-static int
-twl4030_probe(struct i2c_client *client, const struct i2c_device_id *id)
-{
- int status;
- unsigned i;
- struct twl4030_platform_data *pdata = client->dev.platform_data;
-
- if (!pdata) {
- dev_dbg(&client->dev, "no platform data?\n");
- return -EINVAL;
- }
-
- if (i2c_check_functionality(client->adapter, I2C_FUNC_I2C) == 0) {
- dev_dbg(&client->dev, "can't talk I2C?\n");
- return -EIO;
- }
-
- for (i = 0; i < TWL4030_NUM_SLAVES; i++) {
- if (twl4030_modules[i].inuse || twl4030_irq_base) {
- dev_dbg(&client->dev, "driver is already in use\n");
- return -EBUSY;
- }
- }
-
- for (i = 0; i < TWL4030_NUM_SLAVES; i++) {
- struct twl4030_client *twl = &twl4030_modules[i];
-
- twl->address = client->addr + i;
- if (i == 0)
- twl->client = client;
- else {
- twl->client = i2c_new_dummy(client->adapter,
- twl->address);
- if (!twl->client) {
- dev_err(&twl->client->dev,
- "can't attach client %d\n", i);
- status = -ENOMEM;
- goto fail;
- }
- strlcpy(twl->client->name, id->name,
- sizeof(twl->client->name));
- }
- twl->inuse = true;
- mutex_init(&twl->xfer_lock);
- }
-
- /*
- * Check if the PIH module is initialized, if yes, then init
- * the T2 Interrupt subsystem
- */
- if (twl4030_modules[twl4030_map[TWL4030_MODULE_PIH].sid].inuse
- && twl4030_irq_base == 0
- && client->irq
- && pdata->irq_base
- && pdata->irq_end > pdata->irq_base) {
- twl_init_irq(client->irq, pdata->irq_base, pdata->irq_end);
- dev_info(&client->dev, "IRQ %d chains IRQs %d..%d\n",
- client->irq, pdata->irq_base, pdata->irq_end - 1);
- }
-
- status = add_children(pdata);
-fail:
- if (status < 0)
- twl4030_remove(client);
- return status;
-}
-
-static const struct i2c_device_id twl4030_ids[] = {
- { "twl4030", 0 }, /* "Triton 2" */
- { "tps65950", 0 }, /* catalog version of twl4030 */
- { "tps65930", 0 }, /* fewer LDOs and DACs; no charger */
- { "tps65920", 0 }, /* fewer LDOs; no codec or charger */
- { /* end of list */ },
-};
-MODULE_DEVICE_TABLE(i2c, twl4030_ids);
-
-/* One Client Driver , 4 Clients */
-static struct i2c_driver twl4030_driver = {
- .driver.name = DRIVER_NAME,
- .id_table = twl4030_ids,
- .probe = twl4030_probe,
- .remove = twl4030_remove,
-};
-
-static int __init twl4030_init(void)
-{
- return i2c_add_driver(&twl4030_driver);
-}
-subsys_initcall(twl4030_init);
-
-static void __exit twl4030_exit(void)
-{
- i2c_del_driver(&twl4030_driver);
-}
-module_exit(twl4030_exit);
-
-MODULE_AUTHOR("Texas Instruments, Inc.");
-MODULE_DESCRIPTION("I2C Core interface for TWL4030");
-MODULE_LICENSE("GPL");
--- a/drivers/mfd/Kconfig
+++ b/drivers/mfd/Kconfig
@@ -50,6 +50,20 @@ config HTC_PASIC3
HTC Magician devices, respectively. Actual functionality is
handled by the leds-pasic3 and ds1wm drivers.
+config TWL4030_CORE
+ bool "Texas Instruments TWL4030/TPS659x0 Support"
+ depends on I2C=y && GENERIC_HARDIRQS && (ARCH_OMAP2 || ARCH_OMAP3)
+ help
+ Say yes here if you have TWL4030 family chip on your board.
+ This core driver provides register access and IRQ handling
+ facilities, and registers devices for the various functions
+ so that function-specific drivers can bind to them.
+
+ These multi-function chips are found on many OMAP2 and OMAP3
+ boards, providing power management, RTC, GPIO, keypad, a
+ high speed USB OTG transceiver, an audio codec (on most
+ versions) and many other features.
+
config MFD_TMIO
bool
default n
--- a/drivers/mfd/Makefile
+++ b/drivers/mfd/Makefile
@@ -12,6 +12,8 @@ obj-$(CONFIG_MFD_T7L66XB) += t7l66xb.o
obj-$(CONFIG_MFD_TC6387XB) += tc6387xb.o
obj-$(CONFIG_MFD_TC6393XB) += tc6393xb.o
+obj-$(CONFIG_TWL4030_CORE) += twl4030-core.o
+
obj-$(CONFIG_MFD_CORE) += mfd-core.o
obj-$(CONFIG_MCP) += mcp-core.o
--- /dev/null
+++ b/drivers/mfd/twl4030-core.c
@@ -0,0 +1,1255 @@
+/*
+ * twl4030_core.c - driver for TWL4030/TPS659x0 PM and audio CODEC devices
+ *
+ * Copyright (C) 2005-2006 Texas Instruments, Inc.
+ *
+ * Modifications to defer interrupt handling to a kernel thread:
+ * Copyright (C) 2006 MontaVista Software, Inc.
+ *
+ * Based on tlv320aic23.c:
+ * Copyright (c) by Kai Svahn <kai.svahn@xxxxxxxxx>
+ *
+ * Code cleanup and modifications to IRQ handler.
+ * by syed khasim <x0khasim@xxxxxx>
+ *
+ * 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/kernel_stat.h>
+#include <linux/init.h>
+#include <linux/mutex.h>
+#include <linux/interrupt.h>
+#include <linux/irq.h>
+#include <linux/random.h>
+#include <linux/kthread.h>
+#include <linux/platform_device.h>
+#include <linux/clk.h>
+
+#include <linux/i2c.h>
+#include <linux/i2c/twl4030.h>
+#include <linux/i2c/twl4030-gpio.h>
+#include <linux/i2c/twl4030-madc.h>
+#include <linux/i2c/twl4030-pwrirq.h>
+
+#define DRIVER_NAME "twl4030"
+
+#if defined(CONFIG_TWL4030_BCI_BATTERY) || \
+ defined(CONFIG_TWL4030_BCI_BATTERY_MODUEL)
+#define twl_has_bci() true
+#else
+#define twl_has_bci() false
+#endif
+
+#if defined(CONFIG_KEYBOARD_TWL4030) || defined(CONFIG_KEYBOARD_TWL4030_MODULE)
+#define twl_has_keypad() true
+#else
+#define twl_has_keypad() false
+#endif
+
+#if defined(CONFIG_GPIO_TWL4030) || defined(CONFIG_GPIO_TWL4030_MODULE)
+#define twl_has_gpio() true
+#else
+#define twl_has_gpio() false
+#endif
+
+#if defined(CONFIG_TWL4030_MADC) || defined(CONFIG_TWL4030_MADC_MODULE)
+#define twl_has_madc() true
+#else
+#define twl_has_madc() false
+#endif
+
+#if defined(CONFIG_RTC_DRV_TWL4030) || defined(CONFIG_RTC_DRV_TWL4030_MODULE)
+#define twl_has_rtc() true
+#else
+#define twl_has_rtc() false
+#endif
+
+#if defined(CONFIG_TWL4030_USB) || defined(CONFIG_TWL4030_USB_MODULE)
+#define twl_has_usb() true
+#else
+#define twl_has_usb() false
+#endif
+
+static inline void activate_irq(int irq)
+{
+#ifdef CONFIG_ARM
+ /* ARM requires an extra step to clear IRQ_NOREQUEST, which it
+ * sets on behalf of every irq_chip. Also sets IRQ_NOPROBE.
+ */
+ set_irq_flags(irq, IRQF_VALID);
+#else
+ /* same effect on other architectures */
+ set_irq_noprobe(irq);
+#endif
+}
+
+/* Primary Interrupt Handler on TWL4030 Registers */
+
+/* Register Definitions */
+
+#define REG_PIH_ISR_P1 (0x1)
+#define REG_PIH_ISR_P2 (0x2)
+#define REG_PIH_SIR (0x3)
+
+/* Triton Core internal information (BEGIN) */
+
+/* Last - for index max*/
+#define TWL4030_MODULE_LAST TWL4030_MODULE_SECURED_REG
+
+#define TWL4030_NUM_SLAVES 4
+
+/* Slave address */
+#define TWL4030_SLAVENUM_NUM0 0x00
+#define TWL4030_SLAVENUM_NUM1 0x01
+#define TWL4030_SLAVENUM_NUM2 0x02
+#define TWL4030_SLAVENUM_NUM3 0x03
+
+/* Base Address defns */
+/* USB ID */
+#define TWL4030_BASEADD_USB 0x0000
+/* AUD ID */
+#define TWL4030_BASEADD_AUDIO_VOICE 0x0000
+#define TWL4030_BASEADD_GPIO 0x0098
+
+#define TWL4030_BASEADD_INTBR 0x0085
+#define TWL4030_BASEADD_PIH 0x0080
+#define TWL4030_BASEADD_TEST 0x004C
+/* AUX ID */
+#define TWL4030_BASEADD_INTERRUPTS 0x00B9
+#define TWL4030_BASEADD_LED 0x00EE
+#define TWL4030_BASEADD_MADC 0x0000
+#define TWL4030_BASEADD_MAIN_CHARGE 0x0074
+#define TWL4030_BASEADD_PRECHARGE 0x00AA
+#define TWL4030_BASEADD_PWM0 0x00F8
+#define TWL4030_BASEADD_PWM1 0x00FB
+#define TWL4030_BASEADD_PWMA 0x00EF
+#define TWL4030_BASEADD_PWMB 0x00F1
+#define TWL4030_BASEADD_KEYPAD 0x00D2
+/* POWER ID */
+#define TWL4030_BASEADD_BACKUP 0x0014
+#define TWL4030_BASEADD_INT 0x002E
+#define TWL4030_BASEADD_PM_MASTER 0x0036
+#define TWL4030_BASEADD_PM_RECEIVER 0x005B
+#define TWL4030_BASEADD_RTC 0x001C
+#define TWL4030_BASEADD_SECURED_REG 0x0000
+
+/* TWL4030 BCI registers */
+#define TWL4030_INTERRUPTS_BCIIMR1A 0x2
+#define TWL4030_INTERRUPTS_BCIIMR2A 0x3
+#define TWL4030_INTERRUPTS_BCIIMR1B 0x6
+#define TWL4030_INTERRUPTS_BCIIMR2B 0x7
+#define TWL4030_INTERRUPTS_BCIISR1A 0x0
+#define TWL4030_INTERRUPTS_BCIISR2A 0x1
+#define TWL4030_INTERRUPTS_BCIISR1B 0x4
+#define TWL4030_INTERRUPTS_BCIISR2B 0x5
+
+/* TWL4030 keypad registers */
+#define TWL4030_KEYPAD_KEYP_IMR1 0x12
+#define TWL4030_KEYPAD_KEYP_IMR2 0x14
+#define TWL4030_KEYPAD_KEYP_ISR1 0x11
+#define TWL4030_KEYPAD_KEYP_ISR2 0x13
+
+
+/* Triton Core internal information (END) */
+
+/* Few power values */
+#define R_CFG_BOOT 0x05
+#define R_PROTECT_KEY 0x0E
+
+/* access control */
+#define KEY_UNLOCK1 0xce
+#define KEY_UNLOCK2 0xec
+#define KEY_LOCK 0x00
+
+#define HFCLK_FREQ_19p2_MHZ (1 << 0)
+#define HFCLK_FREQ_26_MHZ (2 << 0)
+#define HFCLK_FREQ_38p4_MHZ (3 << 0)
+#define HIGH_PERF_SQ (1 << 3)
+
+/* SIH_CTRL registers that aren't defined elsewhere */
+#define TWL4030_INTERRUPTS_BCISIHCTRL 0x0d
+#define TWL4030_MADC_MADC_SIH_CTRL 0x67
+#define TWL4030_KEYPAD_KEYP_SIH_CTRL 0x17
+
+#define TWL4030_SIH_CTRL_COR_MASK (1 << 2)
+
+/**
+ * struct twl4030_mod_iregs - TWL module IMR/ISR regs to mask/clear at init
+ * @mod_no: TWL4030 module number (e.g., TWL4030_MODULE_GPIO)
+ * @sih_ctrl: address of module SIH_CTRL register
+ * @reg_cnt: number of IMR/ISR regs
+ * @imrs: pointer to array of TWL module interrupt mask register indices
+ * @isrs: pointer to array of TWL module interrupt status register indices
+ *
+ * Ties together TWL4030 modules and lists of IMR/ISR registers to mask/clear
+ * during twl_init_irq().
+ */
+struct twl4030_mod_iregs {
+ const u8 mod_no;
+ const u8 sih_ctrl;
+ const u8 reg_cnt;
+ const u8 *imrs;
+ const u8 *isrs;
+};
+
+/* TWL4030 INT module interrupt mask registers */
+static const u8 __initconst twl4030_int_imr_regs[] = {
+ TWL4030_INT_PWR_IMR1,
+ TWL4030_INT_PWR_IMR2,
+};
+
+/* TWL4030 INT module interrupt status registers */
+static const u8 __initconst twl4030_int_isr_regs[] = {
+ TWL4030_INT_PWR_ISR1,
+ TWL4030_INT_PWR_ISR2,
+};
+
+/* TWL4030 INTERRUPTS module interrupt mask registers */
+static const u8 __initconst twl4030_interrupts_imr_regs[] = {
+ TWL4030_INTERRUPTS_BCIIMR1A,
+ TWL4030_INTERRUPTS_BCIIMR1B,
+ TWL4030_INTERRUPTS_BCIIMR2A,
+ TWL4030_INTERRUPTS_BCIIMR2B,
+};
+
+/* TWL4030 INTERRUPTS module interrupt status registers */
+static const u8 __initconst twl4030_interrupts_isr_regs[] = {
+ TWL4030_INTERRUPTS_BCIISR1A,
+ TWL4030_INTERRUPTS_BCIISR1B,
+ TWL4030_INTERRUPTS_BCIISR2A,
+ TWL4030_INTERRUPTS_BCIISR2B,
+};
+
+/* TWL4030 MADC module interrupt mask registers */
+static const u8 __initconst twl4030_madc_imr_regs[] = {
+ TWL4030_MADC_IMR1,
+ TWL4030_MADC_IMR2,
+};
+
+/* TWL4030 MADC module interrupt status registers */
+static const u8 __initconst twl4030_madc_isr_regs[] = {
+ TWL4030_MADC_ISR1,
+ TWL4030_MADC_ISR2,
+};
+
+/* TWL4030 keypad module interrupt mask registers */
+static const u8 __initconst twl4030_keypad_imr_regs[] = {
+ TWL4030_KEYPAD_KEYP_IMR1,
+ TWL4030_KEYPAD_KEYP_IMR2,
+};
+
+/* TWL4030 keypad module interrupt status registers */
+static const u8 __initconst twl4030_keypad_isr_regs[] = {
+ TWL4030_KEYPAD_KEYP_ISR1,
+ TWL4030_KEYPAD_KEYP_ISR2,
+};
+
+/* TWL4030 GPIO module interrupt mask registers */
+static const u8 __initconst twl4030_gpio_imr_regs[] = {
+ REG_GPIO_IMR1A,
+ REG_GPIO_IMR1B,
+ REG_GPIO_IMR2A,
+ REG_GPIO_IMR2B,
+ REG_GPIO_IMR3A,
+ REG_GPIO_IMR3B,
+};
+
+/* TWL4030 GPIO module interrupt status registers */
+static const u8 __initconst twl4030_gpio_isr_regs[] = {
+ REG_GPIO_ISR1A,
+ REG_GPIO_ISR1B,
+ REG_GPIO_ISR2A,
+ REG_GPIO_ISR2B,
+ REG_GPIO_ISR3A,
+ REG_GPIO_ISR3B,
+};
+
+/* TWL4030 modules that have IMR/ISR registers that must be masked/cleared */
+static const struct twl4030_mod_iregs __initconst twl4030_mod_regs[] = {
+ {
+ .mod_no = TWL4030_MODULE_INT,
+ .sih_ctrl = TWL4030_INT_PWR_SIH_CTRL,
+ .reg_cnt = ARRAY_SIZE(twl4030_int_imr_regs),
+ .imrs = twl4030_int_imr_regs,
+ .isrs = twl4030_int_isr_regs,
+ },
+ {
+ .mod_no = TWL4030_MODULE_INTERRUPTS,
+ .sih_ctrl = TWL4030_INTERRUPTS_BCISIHCTRL,
+ .reg_cnt = ARRAY_SIZE(twl4030_interrupts_imr_regs),
+ .imrs = twl4030_interrupts_imr_regs,
+ .isrs = twl4030_interrupts_isr_regs,
+ },
+ {
+ .mod_no = TWL4030_MODULE_MADC,
+ .sih_ctrl = TWL4030_MADC_MADC_SIH_CTRL,
+ .reg_cnt = ARRAY_SIZE(twl4030_madc_imr_regs),
+ .imrs = twl4030_madc_imr_regs,
+ .isrs = twl4030_madc_isr_regs,
+ },
+ {
+ .mod_no = TWL4030_MODULE_KEYPAD,
+ .sih_ctrl = TWL4030_KEYPAD_KEYP_SIH_CTRL,
+ .reg_cnt = ARRAY_SIZE(twl4030_keypad_imr_regs),
+ .imrs = twl4030_keypad_imr_regs,
+ .isrs = twl4030_keypad_isr_regs,
+ },
+ {
+ .mod_no = TWL4030_MODULE_GPIO,
+ .sih_ctrl = REG_GPIO_SIH_CTRL,
+ .reg_cnt = ARRAY_SIZE(twl4030_gpio_imr_regs),
+ .imrs = twl4030_gpio_imr_regs,
+ .isrs = twl4030_gpio_isr_regs,
+ },
+};
+
+
+/* Data Structures */
+/* To have info on T2 IRQ substem activated or not */
+static struct completion irq_event;
+
+/* Structure to define on TWL4030 Slave ID */
+struct twl4030_client {
+ struct i2c_client *client;
+ u8 address;
+ bool inuse;
+
+ /* max numb of i2c_msg required is for read =2 */
+ struct i2c_msg xfer_msg[2];
+
+ /* To lock access to xfer_msg */
+ struct mutex xfer_lock;
+};
+
+/* Module Mapping */
+struct twl4030mapping {
+ unsigned char sid; /* Slave ID */
+ unsigned char base; /* base address */
+};
+
+/* mapping the module id to slave id and base address */
+static struct twl4030mapping twl4030_map[TWL4030_MODULE_LAST + 1] = {
+ { TWL4030_SLAVENUM_NUM0, TWL4030_BASEADD_USB },
+ { TWL4030_SLAVENUM_NUM1, TWL4030_BASEADD_AUDIO_VOICE },
+ { TWL4030_SLAVENUM_NUM1, TWL4030_BASEADD_GPIO },
+ { TWL4030_SLAVENUM_NUM1, TWL4030_BASEADD_INTBR },
+ { TWL4030_SLAVENUM_NUM1, TWL4030_BASEADD_PIH },
+ { TWL4030_SLAVENUM_NUM1, TWL4030_BASEADD_TEST },
+ { TWL4030_SLAVENUM_NUM2, TWL4030_BASEADD_KEYPAD },
+ { TWL4030_SLAVENUM_NUM2, TWL4030_BASEADD_MADC },
+ { TWL4030_SLAVENUM_NUM2, TWL4030_BASEADD_INTERRUPTS },
+ { TWL4030_SLAVENUM_NUM2, TWL4030_BASEADD_LED },
+ { TWL4030_SLAVENUM_NUM2, TWL4030_BASEADD_MAIN_CHARGE },
+ { TWL4030_SLAVENUM_NUM2, TWL4030_BASEADD_PRECHARGE },
+ { TWL4030_SLAVENUM_NUM2, TWL4030_BASEADD_PWM0 },
+ { TWL4030_SLAVENUM_NUM2, TWL4030_BASEADD_PWM1 },
+ { TWL4030_SLAVENUM_NUM2, TWL4030_BASEADD_PWMA },
+ { TWL4030_SLAVENUM_NUM2, TWL4030_BASEADD_PWMB },
+ { TWL4030_SLAVENUM_NUM3, TWL4030_BASEADD_BACKUP },
+ { TWL4030_SLAVENUM_NUM3, TWL4030_BASEADD_INT },
+ { TWL4030_SLAVENUM_NUM3, TWL4030_BASEADD_PM_MASTER },
+ { TWL4030_SLAVENUM_NUM3, TWL4030_BASEADD_PM_RECEIVER },
+ { TWL4030_SLAVENUM_NUM3, TWL4030_BASEADD_RTC },
+ { TWL4030_SLAVENUM_NUM3, TWL4030_BASEADD_SECURED_REG },
+};
+
+static struct twl4030_client twl4030_modules[TWL4030_NUM_SLAVES];
+
+/*
+ * TWL4030 doesn't have PIH mask, hence dummy function for mask
+ * and unmask.
+ */
+
+static void twl4030_i2c_ackirq(unsigned int irq)
+{
+}
+
+static void twl4030_i2c_disableint(unsigned int irq)
+{
+}
+
+static void twl4030_i2c_enableint(unsigned int irq)
+{
+}
+
+/* information for processing in the Work Item */
+static struct irq_chip twl4030_irq_chip = {
+ .name = "twl4030",
+ .ack = twl4030_i2c_ackirq,
+ .mask = twl4030_i2c_disableint,
+ .unmask = twl4030_i2c_enableint,
+};
+
+/* Global Functions */
+
+/**
+ * twl4030_i2c_write - Writes a n bit register in TWL4030
+ * @mod_no: module number
+ * @value: an array of num_bytes+1 containing data to write
+ * @reg: register address (just offset will do)
+ * @num_bytes: number of bytes to transfer
+ *
+ * IMPORTANT: for 'value' parameter: Allocate value num_bytes+1 and
+ * valid data starts at Offset 1.
+ *
+ * Returns the result of operation - 0 is success
+ */
+int twl4030_i2c_write(u8 mod_no, u8 *value, u8 reg, u8 num_bytes)
+{
+ int ret;
+ int sid;
+ struct twl4030_client *twl;
+ struct i2c_msg *msg;
+
+ if (unlikely(mod_no > TWL4030_MODULE_LAST)) {
+ pr_err("%s: invalid module number %d\n", DRIVER_NAME, mod_no);
+ return -EPERM;
+ }
+ sid = twl4030_map[mod_no].sid;
+ twl = &twl4030_modules[sid];
+
+ if (unlikely(!twl->inuse)) {
+ pr_err("%s: client %d is not initialized\n", DRIVER_NAME, sid);
+ return -EPERM;
+ }
+ mutex_lock(&twl->xfer_lock);
+ /*
+ * [MSG1]: fill the register address data
+ * fill the data Tx buffer
+ */
+ msg = &twl->xfer_msg[0];
+ msg->addr = twl->address;
+ msg->len = num_bytes + 1;
+ msg->flags = 0;
+ msg->buf = value;
+ /* over write the first byte of buffer with the register address */
+ *value = twl4030_map[mod_no].base + reg;
+ ret = i2c_transfer(twl->client->adapter, twl->xfer_msg, 1);
+ mutex_unlock(&twl->xfer_lock);
+
+ /* i2cTransfer returns num messages.translate it pls.. */
+ if (ret >= 0)
+ ret = 0;
+ return ret;
+}
+EXPORT_SYMBOL(twl4030_i2c_write);
+
+/**
+ * twl4030_i2c_read - Reads a n bit register in TWL4030
+ * @mod_no: module number
+ * @value: an array of num_bytes containing data to be read
+ * @reg: register address (just offset will do)
+ * @num_bytes: number of bytes to transfer
+ *
+ * Returns result of operation - num_bytes is success else failure.
+ */
+int twl4030_i2c_read(u8 mod_no, u8 *value, u8 reg, u8 num_bytes)
+{
+ int ret;
+ u8 val;
+ int sid;
+ struct twl4030_client *twl;
+ struct i2c_msg *msg;
+
+ if (unlikely(mod_no > TWL4030_MODULE_LAST)) {
+ pr_err("%s: invalid module number %d\n", DRIVER_NAME, mod_no);
+ return -EPERM;
+ }
+ sid = twl4030_map[mod_no].sid;
+ twl = &twl4030_modules[sid];
+
+ if (unlikely(!twl->inuse)) {
+ pr_err("%s: client %d is not initialized\n", DRIVER_NAME, sid);
+ return -EPERM;
+ }
+ mutex_lock(&twl->xfer_lock);
+ /* [MSG1] fill the register address data */
+ msg = &twl->xfer_msg[0];
+ msg->addr = twl->address;
+ msg->len = 1;
+ msg->flags = 0; /* Read the register value */
+ val = twl4030_map[mod_no].base + reg;
+ msg->buf = &val;
+ /* [MSG2] fill the data rx buffer */
+ msg = &twl->xfer_msg[1];
+ msg->addr = twl->address;
+ msg->flags = I2C_M_RD; /* Read the register value */
+ msg->len = num_bytes; /* only n bytes */
+ msg->buf = value;
+ ret = i2c_transfer(twl->client->adapter, twl->xfer_msg, 2);
+ mutex_unlock(&twl->xfer_lock);
+
+ /* i2cTransfer returns num messages.translate it pls.. */
+ if (ret >= 0)
+ ret = 0;
+ return ret;
+}
+EXPORT_SYMBOL(twl4030_i2c_read);
+
+/**
+ * twl4030_i2c_write_u8 - Writes a 8 bit register in TWL4030
+ * @mod_no: module number
+ * @value: the value to be written 8 bit
+ * @reg: register address (just offset will do)
+ *
+ * Returns result of operation - 0 is success
+ */
+int twl4030_i2c_write_u8(u8 mod_no, u8 value, u8 reg)
+{
+
+ /* 2 bytes offset 1 contains the data offset 0 is used by i2c_write */
+ u8 temp_buffer[2] = { 0 };
+ /* offset 1 contains the data */
+ temp_buffer[1] = value;
+ return twl4030_i2c_write(mod_no, temp_buffer, reg, 1);
+}
+EXPORT_SYMBOL(twl4030_i2c_write_u8);
+
+/**
+ * twl4030_i2c_read_u8 - Reads a 8 bit register from TWL4030
+ * @mod_no: module number
+ * @value: the value read 8 bit
+ * @reg: register address (just offset will do)
+ *
+ * Returns result of operation - 0 is success
+ */
+int twl4030_i2c_read_u8(u8 mod_no, u8 *value, u8 reg)
+{
+ return twl4030_i2c_read(mod_no, value, reg, 1);
+}
+EXPORT_SYMBOL(twl4030_i2c_read_u8);
+
+/* Helper Functions */
+
+/*
+ * do_twl4030_module_irq() is the desc->handle method for each of the twl4030
+ * module interrupts. It executes in kernel thread context.
+ * On entry, cpu interrupts are disabled.
+ */
+static void do_twl4030_module_irq(unsigned int irq, irq_desc_t *desc)
+{
+ struct irqaction *action;
+ const unsigned int cpu = smp_processor_id();
+
+ /*
+ * Earlier this was desc->triggered = 1;
+ */
+ desc->status |= IRQ_LEVEL;
+
+ /*
+ * The desc->handle method would normally call the desc->chip->ack
+ * method here, but we won't bother since our ack method is NULL.
+ */
+
+ if (!desc->depth) {
+ kstat_cpu(cpu).irqs[irq]++;
+
+ action = desc->action;
+ if (action) {
+ int ret;
+ int status = 0;
+ int retval = 0;
+
+ local_irq_enable();
+
+ do {
+ /* Call the ISR with cpu interrupts enabled */
+ ret = action->handler(irq, action->dev_id);
+ if (ret == IRQ_HANDLED)
+ status |= action->flags;
+ retval |= ret;
+ action = action->next;
+ } while (action);
+
+ if (status & IRQF_SAMPLE_RANDOM)
+ add_interrupt_randomness(irq);
+
+ local_irq_disable();
+
+ if (retval != IRQ_HANDLED)
+ printk(KERN_ERR "ISR for TWL4030 module"
+ " irq %d can't handle interrupt\n",
+ irq);
+
+ /*
+ * Here is where we should call the unmask method, but
+ * again we won't bother since it is NULL.
+ */
+ } else
+ printk(KERN_CRIT "TWL4030 module irq %d has no ISR"
+ " but can't be masked!\n", irq);
+ } else
+ printk(KERN_CRIT "TWL4030 module irq %d is disabled but can't"
+ " be masked!\n", irq);
+}
+
+static unsigned twl4030_irq_base;
+
+/*
+ * twl4030_irq_thread() runs as a kernel thread. It queries the twl4030
+ * interrupt controller to see which modules are generating interrupt requests
+ * and then calls the desc->handle method for each module requesting service.
+ */
+static int twl4030_irq_thread(void *data)
+{
+ long irq = (long)data;
+ irq_desc_t *desc = irq_desc + irq;
+ static unsigned i2c_errors;
+ const static unsigned max_i2c_errors = 100;
+
+ daemonize("twl4030-irq");
+ current->flags |= PF_NOFREEZE;
+
+ while (!kthread_should_stop()) {
+ int ret;
+ int module_irq;
+ u8 pih_isr;
+
+ wait_for_completion_interruptible(&irq_event);
+
+ ret = twl4030_i2c_read_u8(TWL4030_MODULE_PIH, &pih_isr,
+ REG_PIH_ISR_P1);
+ if (ret) {
+ printk(KERN_WARNING "I2C error %d while reading TWL4030"
+ " PIH ISR register.\n", ret);
+ if (++i2c_errors >= max_i2c_errors) {
+ printk(KERN_ERR "Maximum I2C error count"
+ " exceeded. Terminating %s.\n",
+ __func__);
+ break;
+ }
+ continue;
+ }
+
+ for (module_irq = twl4030_irq_base; 0 != pih_isr;
+ pih_isr >>= 1, module_irq++) {
+ if (pih_isr & 0x1) {
+ irq_desc_t *d = irq_desc + module_irq;
+
+ local_irq_disable();
+
+ d->handle_irq(module_irq, d);
+
+ local_irq_enable();
+ }
+ }
+
+ desc->chip->unmask(irq);
+ }
+
+ return 0;
+}
+
+/*
+ * do_twl4030_irq() is the desc->handle method for the twl4030 interrupt.
+ * This is a chained interrupt, so there is no desc->action method for it.
+ * Now we need to query the interrupt controller in the twl4030 to determine
+ * which module is generating the interrupt request. However, we can't do i2c
+ * transactions in interrupt context, so we must defer that work to a kernel
+ * thread. All we do here is acknowledge and mask the interrupt and wakeup
+ * the kernel thread.
+ */
+static void do_twl4030_irq(unsigned int irq, irq_desc_t *desc)
+{
+ const unsigned int cpu = smp_processor_id();
+
+ /*
+ * Earlier this was desc->triggered = 1;
+ */
+ desc->status |= IRQ_LEVEL;
+
+ /*
+ * Acknowledge, clear _AND_ disable the interrupt.
+ */
+ desc->chip->ack(irq);
+
+ if (!desc->depth) {
+ kstat_cpu(cpu).irqs[irq]++;
+
+ complete(&irq_event);
+ }
+}
+
+static int add_children(struct twl4030_platform_data *pdata)
+{
+ struct platform_device *pdev = NULL;
+ struct twl4030_client *twl = NULL;
+ int status = 0;
+
+ if (twl_has_bci() && pdata->bci) {
+ twl = &twl4030_modules[TWL4030_SLAVENUM_NUM3];
+
+ pdev = platform_device_alloc("twl4030_bci", -1);
+ if (!pdev) {
+ pr_debug("%s: can't alloc bci dev\n", DRIVER_NAME);
+ status = -ENOMEM;
+ goto err;
+ }
+
+ if (status == 0) {
+ pdev->dev.parent = &twl->client->dev;
+ status = platform_device_add_data(pdev, pdata->bci,
+ sizeof(*pdata->bci));
+ if (status < 0) {
+ dev_dbg(&twl->client->dev,
+ "can't add bci data, %d\n",
+ status);
+ goto err;
+ }
+ }
+
+ if (status == 0) {
+ struct resource r = {
+ .start = TWL4030_PWRIRQ_CHG_PRES,
+ .flags = IORESOURCE_IRQ,
+ };
+
+ status = platform_device_add_resources(pdev, &r, 1);
+ }
+
+ if (status == 0)
+ status = platform_device_add(pdev);
+
+ if (status < 0) {
+ platform_device_put(pdev);
+ dev_dbg(&twl->client->dev,
+ "can't create bci dev, %d\n",
+ status);
+ goto err;
+ }
+ }
+
+ if (twl_has_gpio() && pdata->gpio) {
+ twl = &twl4030_modules[TWL4030_SLAVENUM_NUM1];
+
+ pdev = platform_device_alloc("twl4030_gpio", -1);
+ if (!pdev) {
+ pr_debug("%s: can't alloc gpio dev\n", DRIVER_NAME);
+ status = -ENOMEM;
+ goto err;
+ }
+
+ /* more driver model init */
+ if (status == 0) {
+ pdev->dev.parent = &twl->client->dev;
+ /* device_init_wakeup(&pdev->dev, 1); */
+
+ status = platform_device_add_data(pdev, pdata->gpio,
+ sizeof(*pdata->gpio));
+ if (status < 0) {
+ dev_dbg(&twl->client->dev,
+ "can't add gpio data, %d\n",
+ status);
+ goto err;
+ }
+ }
+
+ /* GPIO module IRQ */
+ if (status == 0) {
+ struct resource r = {
+ .start = pdata->irq_base + 0,
+ .flags = IORESOURCE_IRQ,
+ };
+
+ status = platform_device_add_resources(pdev, &r, 1);
+ }
+
+ if (status == 0)
+ status = platform_device_add(pdev);
+
+ if (status < 0) {
+ platform_device_put(pdev);
+ dev_dbg(&twl->client->dev,
+ "can't create gpio dev, %d\n",
+ status);
+ goto err;
+ }
+ }
+
+ if (twl_has_keypad() && pdata->keypad) {
+ pdev = platform_device_alloc("twl4030_keypad", -1);
+ if (pdev) {
+ twl = &twl4030_modules[TWL4030_SLAVENUM_NUM2];
+ pdev->dev.parent = &twl->client->dev;
+ device_init_wakeup(&pdev->dev, 1);
+ status = platform_device_add_data(pdev, pdata->keypad,
+ sizeof(*pdata->keypad));
+ if (status < 0) {
+ dev_dbg(&twl->client->dev,
+ "can't add keypad data, %d\n",
+ status);
+ platform_device_put(pdev);
+ goto err;
+ }
+ status = platform_device_add(pdev);
+ if (status < 0) {
+ platform_device_put(pdev);
+ dev_dbg(&twl->client->dev,
+ "can't create keypad dev, %d\n",
+ status);
+ goto err;
+ }
+ } else {
+ pr_debug("%s: can't alloc keypad dev\n", DRIVER_NAME);
+ status = -ENOMEM;
+ goto err;
+ }
+ }
+
+ if (twl_has_madc() && pdata->madc) {
+ pdev = platform_device_alloc("twl4030_madc", -1);
+ if (pdev) {
+ twl = &twl4030_modules[TWL4030_SLAVENUM_NUM2];
+ pdev->dev.parent = &twl->client->dev;
+ device_init_wakeup(&pdev->dev, 1);
+ status = platform_device_add_data(pdev, pdata->madc,
+ sizeof(*pdata->madc));
+ if (status < 0) {
+ platform_device_put(pdev);
+ dev_dbg(&twl->client->dev,
+ "can't add madc data, %d\n",
+ status);
+ goto err;
+ }
+ status = platform_device_add(pdev);
+ if (status < 0) {
+ platform_device_put(pdev);
+ dev_dbg(&twl->client->dev,
+ "can't create madc dev, %d\n",
+ status);
+ goto err;
+ }
+ } else {
+ pr_debug("%s: can't alloc madc dev\n", DRIVER_NAME);
+ status = -ENOMEM;
+ goto err;
+ }
+ }
+
+ if (twl_has_rtc()) {
+ twl = &twl4030_modules[TWL4030_SLAVENUM_NUM3];
+
+ pdev = platform_device_alloc("twl4030_rtc", -1);
+ if (!pdev) {
+ pr_debug("%s: can't alloc rtc dev\n", DRIVER_NAME);
+ status = -ENOMEM;
+ } else {
+ pdev->dev.parent = &twl->client->dev;
+ device_init_wakeup(&pdev->dev, 1);
+ }
+
+ /*
+ * REVISIT platform_data here currently might use of
+ * "msecure" line ... but for now we just expect board
+ * setup to tell the chip "we are secure" at all times.
+ * Eventually, Linux might become more aware of such
+ * HW security concerns, and "least privilege".
+ */
+
+ /* RTC module IRQ */
+ if (status == 0) {
+ struct resource r = {
+ /* REVISIT don't hard-wire this stuff */
+ .start = TWL4030_PWRIRQ_RTC,
+ .flags = IORESOURCE_IRQ,
+ };
+
+ status = platform_device_add_resources(pdev, &r, 1);
+ }
+
+ if (status == 0)
+ status = platform_device_add(pdev);
+
+ if (status < 0) {
+ platform_device_put(pdev);
+ dev_dbg(&twl->client->dev,
+ "can't create rtc dev, %d\n",
+ status);
+ goto err;
+ }
+ }
+
+ if (twl_has_usb() && pdata->usb) {
+ twl = &twl4030_modules[TWL4030_SLAVENUM_NUM0];
+
+ pdev = platform_device_alloc("twl4030_usb", -1);
+ if (!pdev) {
+ pr_debug("%s: can't alloc usb dev\n", DRIVER_NAME);
+ status = -ENOMEM;
+ goto err;
+ }
+
+ if (status == 0) {
+ pdev->dev.parent = &twl->client->dev;
+ device_init_wakeup(&pdev->dev, 1);
+ status = platform_device_add_data(pdev, pdata->usb,
+ sizeof(*pdata->usb));
+ if (status < 0) {
+ platform_device_put(pdev);
+ dev_dbg(&twl->client->dev,
+ "can't add usb data, %d\n",
+ status);
+ goto err;
+ }
+ }
+
+ if (status == 0) {
+ struct resource r = {
+ .start = TWL4030_PWRIRQ_USB_PRES,
+ .flags = IORESOURCE_IRQ,
+ };
+
+ status = platform_device_add_resources(pdev, &r, 1);
+ }
+
+ if (status == 0)
+ status = platform_device_add(pdev);
+
+ if (status < 0) {
+ platform_device_put(pdev);
+ dev_dbg(&twl->client->dev,
+ "can't create usb dev, %d\n",
+ status);
+ }
+ }
+
+err:
+ if (status)
+ pr_err("failed to add twl4030's children (status %d)\n", status);
+ return status;
+}
+
+static struct task_struct * __init start_twl4030_irq_thread(long irq)
+{
+ struct task_struct *thread;
+
+ init_completion(&irq_event);
+ thread = kthread_run(twl4030_irq_thread, (void *)irq,
+ "twl4030 irq %ld", irq);
+ if (!thread)
+ pr_err("%s: could not create twl4030 irq %ld thread!\n",
+ DRIVER_NAME, irq);
+
+ return thread;
+}
+
+/*
+ * These three functions should be part of Voltage frame work
+ * added here to complete the functionality for now.
+ */
+static int __init protect_pm_master(void)
+{
+ int e = 0;
+
+ e = twl4030_i2c_write_u8(TWL4030_MODULE_PM_MASTER, KEY_LOCK,
+ R_PROTECT_KEY);
+ return e;
+}
+
+static int __init unprotect_pm_master(void)
+{
+ int e = 0;
+
+ e |= twl4030_i2c_write_u8(TWL4030_MODULE_PM_MASTER, KEY_UNLOCK1,
+ R_PROTECT_KEY);
+ e |= twl4030_i2c_write_u8(TWL4030_MODULE_PM_MASTER, KEY_UNLOCK2,
+ R_PROTECT_KEY);
+ return e;
+}
+
+static int __init power_companion_init(void)
+{
+ int e = 0;
+ struct clk *osc;
+ u32 rate;
+ u8 ctrl = HFCLK_FREQ_26_MHZ;
+
+#if defined(CONFIG_ARCH_OMAP2) || defined(CONFIG_ARCH_OMAP3)
+ if (cpu_is_omap2430())
+ osc = clk_get(NULL, "osc_ck");
+ else
+ osc = clk_get(NULL, "osc_sys_ck");
+#else
+ osc = ERR_PTR(-EIO);
+#endif
+ if (IS_ERR(osc)) {
+ printk(KERN_WARNING "Skipping twl4030 internal clock init and "
+ "using bootloader value (unknown osc rate)\n");
+ return 0;
+ }
+
+ rate = clk_get_rate(osc);
+ clk_put(osc);
+
+ switch (rate) {
+ case 19200000:
+ ctrl = HFCLK_FREQ_19p2_MHZ;
+ break;
+ case 26000000:
+ ctrl = HFCLK_FREQ_26_MHZ;
+ break;
+ case 38400000:
+ ctrl = HFCLK_FREQ_38p4_MHZ;
+ break;
+ }
+
+ ctrl |= HIGH_PERF_SQ;
+ e |= unprotect_pm_master();
+ /* effect->MADC+USB ck en */
+ e |= twl4030_i2c_write_u8(TWL4030_MODULE_PM_MASTER, ctrl, R_CFG_BOOT);
+ e |= protect_pm_master();
+
+ return e;
+}
+
+/**
+ * twl4030_i2c_clear_isr - clear TWL4030 SIH ISR regs via read + write
+ * @mod_no: TWL4030 module number
+ * @reg: register index to clear
+ * @cor: value of the <module>_SIH_CTRL.COR bit (1 or 0)
+ *
+ * Either reads (cor == 1) or writes (cor == 0) to a TWL4030 interrupt
+ * status register to ensure that any prior interrupts are cleared.
+ * Returns the status from the I2C read operation.
+ */
+static int __init twl4030_i2c_clear_isr(u8 mod_no, u8 reg, u8 cor)
+{
+ u8 tmp;
+
+ return (cor) ? twl4030_i2c_read_u8(mod_no, &tmp, reg) :
+ twl4030_i2c_write_u8(mod_no, 0xff, reg);
+}
+
+/**
+ * twl4030_read_cor_bit - are TWL module ISRs cleared by reads or writes?
+ * @mod_no: TWL4030 module number
+ * @reg: register index to clear
+ *
+ * Returns 1 if the TWL4030 SIH interrupt status registers (ISRs) for
+ * the specified TWL module are cleared by reads, or 0 if cleared by
+ * writes.
+ */
+static int twl4030_read_cor_bit(u8 mod_no, u8 reg)
+{
+ u8 tmp = 0;
+
+ WARN_ON(twl4030_i2c_read_u8(mod_no, &tmp, reg) < 0);
+
+ tmp &= TWL4030_SIH_CTRL_COR_MASK;
+ tmp >>= __ffs(TWL4030_SIH_CTRL_COR_MASK);
+
+ return tmp;
+}
+
+/**
+ * twl4030_mask_clear_intrs - mask and clear all TWL4030 interrupts
+ * @t: pointer to twl4030_mod_iregs array
+ * @t_sz: ARRAY_SIZE(t) (starting at 1)
+ *
+ * Mask all TWL4030 interrupt mask registers (IMRs) and clear all
+ * interrupt status registers (ISRs). No return value, but will WARN if
+ * any I2C operations fail.
+ */
+static void __init twl4030_mask_clear_intrs(const struct twl4030_mod_iregs *t,
+ const u8 t_sz)
+{
+ int i, j;
+
+ /*
+ * N.B. - further efficiency is possible here. Eight I2C
+ * operations on BCI and GPIO modules are avoidable if I2C
+ * burst read/write transactions were implemented. Would
+ * probably save about 1ms of boot time and a small amount of
+ * power.
+ */
+ for (i = 0; i < t_sz; i++) {
+ const struct twl4030_mod_iregs tmr = t[i];
+ int cor;
+
+ /* Are ISRs cleared by reads or writes? */
+ cor = twl4030_read_cor_bit(tmr.mod_no, tmr.sih_ctrl);
+ WARN_ON(cor < 0);
+
+ for (j = 0; j < tmr.reg_cnt; j++) {
+
+ /* Mask interrupts at the TWL4030 */
+ WARN_ON(twl4030_i2c_write_u8(tmr.mod_no, 0xff,
+ tmr.imrs[j]) < 0);
+
+ /* Clear TWL4030 ISRs */
+ WARN_ON(twl4030_i2c_clear_isr(tmr.mod_no,
+ tmr.isrs[j], cor) < 0);
+ }
+ }
+
+ return;
+}
+
+
+static void twl_init_irq(int irq_num, unsigned irq_base, unsigned irq_end)
+{
+ int i;
+ int res = 0;
+ char *msg = "Unable to register interrupt subsystem";
+
+ /*
+ * Mask and clear all TWL4030 interrupts since initially we do
+ * not have any TWL4030 module interrupt handlers present
+ */
+ twl4030_mask_clear_intrs(twl4030_mod_regs,
+ ARRAY_SIZE(twl4030_mod_regs));
+
+ twl4030_irq_base = irq_base;
+
+ /* install an irq handler for each of the PIH modules */
+ for (i = irq_base; i < irq_end; i++) {
+ set_irq_chip_and_handler(i, &twl4030_irq_chip,
+ do_twl4030_module_irq);
+ activate_irq(i);
+ }
+
+ /* install an irq handler to demultiplex the TWL4030 interrupt */
+ set_irq_data(irq_num, start_twl4030_irq_thread(irq_num));
+ set_irq_type(irq_num, IRQ_TYPE_EDGE_FALLING);
+ set_irq_chained_handler(irq_num, do_twl4030_irq);
+
+ res = power_companion_init();
+ if (res < 0)
+ pr_err("%s: %s[%d]\n", DRIVER_NAME, msg, res);
+}
+
+/*----------------------------------------------------------------------*/
+
+static int twl4030_remove(struct i2c_client *client)
+{
+ unsigned i;
+
+ /* FIXME undo twl_init_irq() */
+ if (twl4030_irq_base) {
+ dev_err(&client->dev, "can't yet clean up IRQs?\n");
+ return -ENOSYS;
+ }
+
+ for (i = 0; i < TWL4030_NUM_SLAVES; i++) {
+ struct twl4030_client *twl = &twl4030_modules[i];
+
+ if (twl->client && twl->client != client)
+ i2c_unregister_device(twl->client);
+ twl4030_modules[i].client = NULL;
+ twl4030_modules[i].inuse = false;
+ }
+ return 0;
+}
+
+/* NOTE: this driver only handles a single twl4030/tps659x0 chip */
+static int
+twl4030_probe(struct i2c_client *client, const struct i2c_device_id *id)
+{
+ int status;
+ unsigned i;
+ struct twl4030_platform_data *pdata = client->dev.platform_data;
+
+ if (!pdata) {
+ dev_dbg(&client->dev, "no platform data?\n");
+ return -EINVAL;
+ }
+
+ if (i2c_check_functionality(client->adapter, I2C_FUNC_I2C) == 0) {
+ dev_dbg(&client->dev, "can't talk I2C?\n");
+ return -EIO;
+ }
+
+ for (i = 0; i < TWL4030_NUM_SLAVES; i++) {
+ if (twl4030_modules[i].inuse || twl4030_irq_base) {
+ dev_dbg(&client->dev, "driver is already in use\n");
+ return -EBUSY;
+ }
+ }
+
+ for (i = 0; i < TWL4030_NUM_SLAVES; i++) {
+ struct twl4030_client *twl = &twl4030_modules[i];
+
+ twl->address = client->addr + i;
+ if (i == 0)
+ twl->client = client;
+ else {
+ twl->client = i2c_new_dummy(client->adapter,
+ twl->address);
+ if (!twl->client) {
+ dev_err(&twl->client->dev,
+ "can't attach client %d\n", i);
+ status = -ENOMEM;
+ goto fail;
+ }
+ strlcpy(twl->client->name, id->name,
+ sizeof(twl->client->name));
+ }
+ twl->inuse = true;
+ mutex_init(&twl->xfer_lock);
+ }
+
+ /*
+ * Check if the PIH module is initialized, if yes, then init
+ * the T2 Interrupt subsystem
+ */
+ if (twl4030_modules[twl4030_map[TWL4030_MODULE_PIH].sid].inuse
+ && twl4030_irq_base == 0
+ && client->irq
+ && pdata->irq_base
+ && pdata->irq_end > pdata->irq_base) {
+ twl_init_irq(client->irq, pdata->irq_base, pdata->irq_end);
+ dev_info(&client->dev, "IRQ %d chains IRQs %d..%d\n",
+ client->irq, pdata->irq_base, pdata->irq_end - 1);
+ }
+
+ status = add_children(pdata);
+fail:
+ if (status < 0)
+ twl4030_remove(client);
+ return status;
+}
+
+static const struct i2c_device_id twl4030_ids[] = {
+ { "twl4030", 0 }, /* "Triton 2" */
+ { "tps65950", 0 }, /* catalog version of twl4030 */
+ { "tps65930", 0 }, /* fewer LDOs and DACs; no charger */
+ { "tps65920", 0 }, /* fewer LDOs; no codec or charger */
+ { /* end of list */ },
+};
+MODULE_DEVICE_TABLE(i2c, twl4030_ids);
+
+/* One Client Driver , 4 Clients */
+static struct i2c_driver twl4030_driver = {
+ .driver.name = DRIVER_NAME,
+ .id_table = twl4030_ids,
+ .probe = twl4030_probe,
+ .remove = twl4030_remove,
+};
+
+static int __init twl4030_init(void)
+{
+ return i2c_add_driver(&twl4030_driver);
+}
+subsys_initcall(twl4030_init);
+
+static void __exit twl4030_exit(void)
+{
+ i2c_del_driver(&twl4030_driver);
+}
+module_exit(twl4030_exit);
+
+MODULE_AUTHOR("Texas Instruments, Inc.");
+MODULE_DESCRIPTION("I2C Core interface for TWL4030");
+MODULE_LICENSE("GPL");
--
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