mirror of https://gitee.com/openkylin/linux.git
1194 lines
30 KiB
C
1194 lines
30 KiB
C
/*
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* twl4030_core.c - driver for TWL4030/TPS659x0 PM and audio CODEC devices
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*
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* Copyright (C) 2005-2006 Texas Instruments, Inc.
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*
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* Modifications to defer interrupt handling to a kernel thread:
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* Copyright (C) 2006 MontaVista Software, Inc.
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*
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* Based on tlv320aic23.c:
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* Copyright (c) by Kai Svahn <kai.svahn@nokia.com>
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*
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* Code cleanup and modifications to IRQ handler.
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* by syed khasim <x0khasim@ti.com>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#include <linux/kernel_stat.h>
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#include <linux/init.h>
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#include <linux/mutex.h>
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#include <linux/interrupt.h>
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#include <linux/irq.h>
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#include <linux/random.h>
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#include <linux/kthread.h>
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#include <linux/platform_device.h>
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#include <linux/clk.h>
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#include <linux/i2c.h>
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#include <linux/i2c/twl4030.h>
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/*
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* The TWL4030 "Triton 2" is one of a family of a multi-function "Power
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* Management and System Companion Device" chips originally designed for
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* use in OMAP2 and OMAP 3 based systems. Its control interfaces use I2C,
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* often at around 3 Mbit/sec, including for interrupt handling.
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*
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* This driver core provides genirq support for the interrupts emitted,
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* by the various modules, and exports register access primitives.
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*
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* FIXME this driver currently requires use of the first interrupt line
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* (and associated registers).
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*/
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#define DRIVER_NAME "twl4030"
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#if defined(CONFIG_TWL4030_BCI_BATTERY) || \
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defined(CONFIG_TWL4030_BCI_BATTERY_MODULE)
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#define twl_has_bci() true
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#else
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#define twl_has_bci() false
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#endif
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#if defined(CONFIG_KEYBOARD_TWL4030) || defined(CONFIG_KEYBOARD_TWL4030_MODULE)
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#define twl_has_keypad() true
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#else
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#define twl_has_keypad() false
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#endif
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#if defined(CONFIG_GPIO_TWL4030) || defined(CONFIG_GPIO_TWL4030_MODULE)
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#define twl_has_gpio() true
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#else
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#define twl_has_gpio() false
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#endif
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#if defined(CONFIG_TWL4030_MADC) || defined(CONFIG_TWL4030_MADC_MODULE)
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#define twl_has_madc() true
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#else
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#define twl_has_madc() false
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#endif
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#if defined(CONFIG_RTC_DRV_TWL4030) || defined(CONFIG_RTC_DRV_TWL4030_MODULE)
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#define twl_has_rtc() true
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#else
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#define twl_has_rtc() false
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#endif
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#if defined(CONFIG_TWL4030_USB) || defined(CONFIG_TWL4030_USB_MODULE)
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#define twl_has_usb() true
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#else
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#define twl_has_usb() false
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#endif
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static inline void activate_irq(int irq)
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{
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#ifdef CONFIG_ARM
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/* ARM requires an extra step to clear IRQ_NOREQUEST, which it
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* sets on behalf of every irq_chip. Also sets IRQ_NOPROBE.
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*/
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set_irq_flags(irq, IRQF_VALID);
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#else
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/* same effect on other architectures */
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set_irq_noprobe(irq);
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#endif
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}
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/* Primary Interrupt Handler on TWL4030 Registers */
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/* Register Definitions */
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#define REG_PIH_ISR_P1 (0x1)
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#define REG_PIH_ISR_P2 (0x2)
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#define REG_PIH_SIR (0x3)
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/* Triton Core internal information (BEGIN) */
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/* Last - for index max*/
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#define TWL4030_MODULE_LAST TWL4030_MODULE_SECURED_REG
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#define TWL4030_NUM_SLAVES 4
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/* Base Address defns for twl4030_map[] */
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/* subchip/slave 0 - USB ID */
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#define TWL4030_BASEADD_USB 0x0000
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/* subchip/slave 1 - AUD ID */
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#define TWL4030_BASEADD_AUDIO_VOICE 0x0000
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#define TWL4030_BASEADD_GPIO 0x0098
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#define TWL4030_BASEADD_INTBR 0x0085
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#define TWL4030_BASEADD_PIH 0x0080
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#define TWL4030_BASEADD_TEST 0x004C
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/* subchip/slave 2 - AUX ID */
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#define TWL4030_BASEADD_INTERRUPTS 0x00B9
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#define TWL4030_BASEADD_LED 0x00EE
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#define TWL4030_BASEADD_MADC 0x0000
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#define TWL4030_BASEADD_MAIN_CHARGE 0x0074
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#define TWL4030_BASEADD_PRECHARGE 0x00AA
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#define TWL4030_BASEADD_PWM0 0x00F8
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#define TWL4030_BASEADD_PWM1 0x00FB
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#define TWL4030_BASEADD_PWMA 0x00EF
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#define TWL4030_BASEADD_PWMB 0x00F1
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#define TWL4030_BASEADD_KEYPAD 0x00D2
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/* subchip/slave 3 - POWER ID */
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#define TWL4030_BASEADD_BACKUP 0x0014
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#define TWL4030_BASEADD_INT 0x002E
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#define TWL4030_BASEADD_PM_MASTER 0x0036
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#define TWL4030_BASEADD_PM_RECEIVER 0x005B
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#define TWL4030_BASEADD_RTC 0x001C
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#define TWL4030_BASEADD_SECURED_REG 0x0000
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/* Triton Core internal information (END) */
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/* Few power values */
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#define R_CFG_BOOT 0x05
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#define R_PROTECT_KEY 0x0E
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/* access control values for R_PROTECT_KEY */
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#define KEY_UNLOCK1 0xce
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#define KEY_UNLOCK2 0xec
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#define KEY_LOCK 0x00
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/* some fields in R_CFG_BOOT */
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#define HFCLK_FREQ_19p2_MHZ (1 << 0)
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#define HFCLK_FREQ_26_MHZ (2 << 0)
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#define HFCLK_FREQ_38p4_MHZ (3 << 0)
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#define HIGH_PERF_SQ (1 << 3)
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/*----------------------------------------------------------------------*/
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/**
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* struct twl4030_mod_iregs - TWL module IMR/ISR regs to mask/clear at init
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* @mod_no: TWL4030 module number (e.g., TWL4030_MODULE_GPIO)
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* @sih_ctrl: address of module SIH_CTRL register
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* @reg_cnt: number of IMR/ISR regs
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* @imrs: pointer to array of TWL module interrupt mask register indices
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* @isrs: pointer to array of TWL module interrupt status register indices
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*
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* Ties together TWL4030 modules and lists of IMR/ISR registers to mask/clear
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* during twl_init_irq().
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*/
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struct twl4030_mod_iregs {
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const u8 mod_no;
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const u8 sih_ctrl;
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const u8 reg_cnt;
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const u8 *imrs;
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const u8 *isrs;
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};
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/* TWL4030 INT module interrupt mask registers */
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static const u8 __initconst twl4030_int_imr_regs[] = {
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TWL4030_INT_PWR_IMR1,
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TWL4030_INT_PWR_IMR2,
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};
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/* TWL4030 INT module interrupt status registers */
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static const u8 __initconst twl4030_int_isr_regs[] = {
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TWL4030_INT_PWR_ISR1,
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TWL4030_INT_PWR_ISR2,
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};
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/* TWL4030 INTERRUPTS module interrupt mask registers */
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static const u8 __initconst twl4030_interrupts_imr_regs[] = {
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TWL4030_INTERRUPTS_BCIIMR1A,
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TWL4030_INTERRUPTS_BCIIMR1B,
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TWL4030_INTERRUPTS_BCIIMR2A,
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TWL4030_INTERRUPTS_BCIIMR2B,
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};
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/* TWL4030 INTERRUPTS module interrupt status registers */
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static const u8 __initconst twl4030_interrupts_isr_regs[] = {
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TWL4030_INTERRUPTS_BCIISR1A,
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TWL4030_INTERRUPTS_BCIISR1B,
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TWL4030_INTERRUPTS_BCIISR2A,
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TWL4030_INTERRUPTS_BCIISR2B,
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};
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/* TWL4030 MADC module interrupt mask registers */
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static const u8 __initconst twl4030_madc_imr_regs[] = {
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TWL4030_MADC_IMR1,
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TWL4030_MADC_IMR2,
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};
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/* TWL4030 MADC module interrupt status registers */
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static const u8 __initconst twl4030_madc_isr_regs[] = {
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TWL4030_MADC_ISR1,
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TWL4030_MADC_ISR2,
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};
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/* TWL4030 keypad module interrupt mask registers */
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static const u8 __initconst twl4030_keypad_imr_regs[] = {
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TWL4030_KEYPAD_KEYP_IMR1,
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TWL4030_KEYPAD_KEYP_IMR2,
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};
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/* TWL4030 keypad module interrupt status registers */
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static const u8 __initconst twl4030_keypad_isr_regs[] = {
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TWL4030_KEYPAD_KEYP_ISR1,
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TWL4030_KEYPAD_KEYP_ISR2,
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};
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/* TWL4030 GPIO module interrupt mask registers */
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static const u8 __initconst twl4030_gpio_imr_regs[] = {
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REG_GPIO_IMR1A,
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REG_GPIO_IMR1B,
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REG_GPIO_IMR2A,
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REG_GPIO_IMR2B,
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REG_GPIO_IMR3A,
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REG_GPIO_IMR3B,
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};
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/* TWL4030 GPIO module interrupt status registers */
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static const u8 __initconst twl4030_gpio_isr_regs[] = {
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REG_GPIO_ISR1A,
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REG_GPIO_ISR1B,
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REG_GPIO_ISR2A,
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REG_GPIO_ISR2B,
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REG_GPIO_ISR3A,
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REG_GPIO_ISR3B,
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};
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/* TWL4030 modules that have IMR/ISR registers that must be masked/cleared */
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static const struct twl4030_mod_iregs __initconst twl4030_mod_regs[] = {
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{
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.mod_no = TWL4030_MODULE_INT,
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.sih_ctrl = TWL4030_INT_PWR_SIH_CTRL,
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.reg_cnt = ARRAY_SIZE(twl4030_int_imr_regs),
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.imrs = twl4030_int_imr_regs,
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.isrs = twl4030_int_isr_regs,
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},
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{
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.mod_no = TWL4030_MODULE_INTERRUPTS,
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.sih_ctrl = TWL4030_INTERRUPTS_BCISIHCTRL,
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.reg_cnt = ARRAY_SIZE(twl4030_interrupts_imr_regs),
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.imrs = twl4030_interrupts_imr_regs,
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.isrs = twl4030_interrupts_isr_regs,
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},
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{
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.mod_no = TWL4030_MODULE_MADC,
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.sih_ctrl = TWL4030_MADC_SIH_CTRL,
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.reg_cnt = ARRAY_SIZE(twl4030_madc_imr_regs),
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.imrs = twl4030_madc_imr_regs,
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.isrs = twl4030_madc_isr_regs,
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},
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{
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.mod_no = TWL4030_MODULE_KEYPAD,
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.sih_ctrl = TWL4030_KEYPAD_KEYP_SIH_CTRL,
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.reg_cnt = ARRAY_SIZE(twl4030_keypad_imr_regs),
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.imrs = twl4030_keypad_imr_regs,
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.isrs = twl4030_keypad_isr_regs,
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},
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{
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.mod_no = TWL4030_MODULE_GPIO,
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.sih_ctrl = REG_GPIO_SIH_CTRL,
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.reg_cnt = ARRAY_SIZE(twl4030_gpio_imr_regs),
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.imrs = twl4030_gpio_imr_regs,
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.isrs = twl4030_gpio_isr_regs,
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},
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};
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/*----------------------------------------------------------------*/
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/* is driver active, bound to a chip? */
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static bool inuse;
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/* Structure for each TWL4030 Slave */
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struct twl4030_client {
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struct i2c_client *client;
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u8 address;
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/* max numb of i2c_msg required is for read =2 */
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struct i2c_msg xfer_msg[2];
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/* To lock access to xfer_msg */
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struct mutex xfer_lock;
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};
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static struct twl4030_client twl4030_modules[TWL4030_NUM_SLAVES];
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/* mapping the module id to slave id and base address */
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struct twl4030mapping {
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unsigned char sid; /* Slave ID */
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unsigned char base; /* base address */
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};
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static struct twl4030mapping twl4030_map[TWL4030_MODULE_LAST + 1] = {
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/*
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* NOTE: don't change this table without updating the
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* <linux/i2c/twl4030.h> defines for TWL4030_MODULE_*
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* so they continue to match the order in this table.
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*/
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{ 0, TWL4030_BASEADD_USB },
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{ 1, TWL4030_BASEADD_AUDIO_VOICE },
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{ 1, TWL4030_BASEADD_GPIO },
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{ 1, TWL4030_BASEADD_INTBR },
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{ 1, TWL4030_BASEADD_PIH },
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{ 1, TWL4030_BASEADD_TEST },
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{ 2, TWL4030_BASEADD_KEYPAD },
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{ 2, TWL4030_BASEADD_MADC },
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{ 2, TWL4030_BASEADD_INTERRUPTS },
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{ 2, TWL4030_BASEADD_LED },
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{ 2, TWL4030_BASEADD_MAIN_CHARGE },
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{ 2, TWL4030_BASEADD_PRECHARGE },
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{ 2, TWL4030_BASEADD_PWM0 },
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{ 2, TWL4030_BASEADD_PWM1 },
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{ 2, TWL4030_BASEADD_PWMA },
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{ 2, TWL4030_BASEADD_PWMB },
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{ 3, TWL4030_BASEADD_BACKUP },
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{ 3, TWL4030_BASEADD_INT },
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{ 3, TWL4030_BASEADD_PM_MASTER },
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{ 3, TWL4030_BASEADD_PM_RECEIVER },
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{ 3, TWL4030_BASEADD_RTC },
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{ 3, TWL4030_BASEADD_SECURED_REG },
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};
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/*----------------------------------------------------------------------*/
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/*
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* TWL4030 doesn't have PIH mask, hence dummy function for mask
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* and unmask of the (eight) interrupts reported at that level ...
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* masking is only available from SIH (secondary) modules.
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*/
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static void twl4030_i2c_ackirq(unsigned int irq)
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{
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}
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static void twl4030_i2c_disableint(unsigned int irq)
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{
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}
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static void twl4030_i2c_enableint(unsigned int irq)
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{
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}
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static struct irq_chip twl4030_irq_chip = {
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.name = "twl4030",
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.ack = twl4030_i2c_ackirq,
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.mask = twl4030_i2c_disableint,
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.unmask = twl4030_i2c_enableint,
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};
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/*----------------------------------------------------------------------*/
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/* Exported Functions */
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/**
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* twl4030_i2c_write - Writes a n bit register in TWL4030
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* @mod_no: module number
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* @value: an array of num_bytes+1 containing data to write
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* @reg: register address (just offset will do)
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* @num_bytes: number of bytes to transfer
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*
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* IMPORTANT: for 'value' parameter: Allocate value num_bytes+1 and
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* valid data starts at Offset 1.
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*
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* Returns the result of operation - 0 is success
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*/
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int twl4030_i2c_write(u8 mod_no, u8 *value, u8 reg, u8 num_bytes)
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{
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int ret;
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int sid;
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struct twl4030_client *twl;
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struct i2c_msg *msg;
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if (unlikely(mod_no > TWL4030_MODULE_LAST)) {
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pr_err("%s: invalid module number %d\n", DRIVER_NAME, mod_no);
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return -EPERM;
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}
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sid = twl4030_map[mod_no].sid;
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twl = &twl4030_modules[sid];
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if (unlikely(!inuse)) {
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pr_err("%s: client %d is not initialized\n", DRIVER_NAME, sid);
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return -EPERM;
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}
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mutex_lock(&twl->xfer_lock);
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/*
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* [MSG1]: fill the register address data
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* fill the data Tx buffer
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*/
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msg = &twl->xfer_msg[0];
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msg->addr = twl->address;
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msg->len = num_bytes + 1;
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msg->flags = 0;
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msg->buf = value;
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/* over write the first byte of buffer with the register address */
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*value = twl4030_map[mod_no].base + reg;
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ret = i2c_transfer(twl->client->adapter, twl->xfer_msg, 1);
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mutex_unlock(&twl->xfer_lock);
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/* i2cTransfer returns num messages.translate it pls.. */
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if (ret >= 0)
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ret = 0;
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return ret;
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}
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EXPORT_SYMBOL(twl4030_i2c_write);
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/**
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* twl4030_i2c_read - Reads a n bit register in TWL4030
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* @mod_no: module number
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* @value: an array of num_bytes containing data to be read
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* @reg: register address (just offset will do)
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* @num_bytes: number of bytes to transfer
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*
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* Returns result of operation - num_bytes is success else failure.
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*/
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int twl4030_i2c_read(u8 mod_no, u8 *value, u8 reg, u8 num_bytes)
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{
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int ret;
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u8 val;
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int sid;
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struct twl4030_client *twl;
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struct i2c_msg *msg;
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if (unlikely(mod_no > TWL4030_MODULE_LAST)) {
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pr_err("%s: invalid module number %d\n", DRIVER_NAME, mod_no);
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return -EPERM;
|
|
}
|
|
sid = twl4030_map[mod_no].sid;
|
|
twl = &twl4030_modules[sid];
|
|
|
|
if (unlikely(!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);
|
|
|
|
/*----------------------------------------------------------------------*/
|
|
|
|
static unsigned twl4030_irq_base;
|
|
|
|
static struct completion irq_event;
|
|
|
|
/*
|
|
* This thread processes interrupts reported by the Primary Interrupt Handler.
|
|
*/
|
|
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;
|
|
|
|
current->flags |= PF_NOFREEZE;
|
|
|
|
while (!kthread_should_stop()) {
|
|
int ret;
|
|
int module_irq;
|
|
u8 pih_isr;
|
|
|
|
/* Wait for IRQ, then read PIH irq status (also blocking) */
|
|
wait_for_completion_interruptible(&irq_event);
|
|
|
|
ret = twl4030_i2c_read_u8(TWL4030_MODULE_PIH, &pih_isr,
|
|
REG_PIH_ISR_P1);
|
|
if (ret) {
|
|
pr_warning("%s: I2C error %d reading PIH ISR\n",
|
|
DRIVER_NAME, ret);
|
|
if (++i2c_errors >= max_i2c_errors) {
|
|
printk(KERN_ERR "Maximum I2C error count"
|
|
" exceeded. Terminating %s.\n",
|
|
__func__);
|
|
break;
|
|
}
|
|
complete(&irq_event);
|
|
continue;
|
|
}
|
|
|
|
/* these handlers deal with the relevant SIH irq status */
|
|
local_irq_disable();
|
|
for (module_irq = twl4030_irq_base;
|
|
pih_isr;
|
|
pih_isr >>= 1, module_irq++) {
|
|
if (pih_isr & 0x1) {
|
|
irq_desc_t *d = irq_desc + module_irq;
|
|
|
|
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 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");
|
|
if (!thread)
|
|
pr_err("%s: could not create twl4030 irq %ld thread!\n",
|
|
DRIVER_NAME, irq);
|
|
|
|
return thread;
|
|
}
|
|
|
|
/*----------------------------------------------------------------------*/
|
|
|
|
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[3];
|
|
|
|
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[1];
|
|
|
|
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[2];
|
|
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[2];
|
|
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[3];
|
|
|
|
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[0];
|
|
|
|
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;
|
|
}
|
|
|
|
/*----------------------------------------------------------------------*/
|
|
|
|
/*
|
|
* These three functions initialize the on-chip clock framework,
|
|
* letting it generate the right frequencies for USB, MADC, and
|
|
* other purposes.
|
|
*/
|
|
static inline 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 inline 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 void __init clocks_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
|
|
/* REVISIT for non-OMAP systems, pass the clock rate from
|
|
* board init code, using platform_data.
|
|
*/
|
|
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;
|
|
}
|
|
|
|
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();
|
|
|
|
if (e < 0)
|
|
pr_err("%s: clock init err [%d]\n", DRIVER_NAME, 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);
|
|
|
|
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);
|
|
}
|
|
}
|
|
}
|
|
|
|
|
|
static void twl_init_irq(int irq_num, unsigned irq_base, unsigned irq_end)
|
|
{
|
|
int i;
|
|
|
|
/*
|
|
* 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,
|
|
handle_simple_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_chained_handler(irq_num, do_twl4030_irq);
|
|
}
|
|
|
|
/*----------------------------------------------------------------------*/
|
|
|
|
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;
|
|
}
|
|
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;
|
|
}
|
|
|
|
if (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));
|
|
}
|
|
mutex_init(&twl->xfer_lock);
|
|
}
|
|
inuse = true;
|
|
|
|
/* setup clock framework */
|
|
clocks_init();
|
|
|
|
/* Maybe init the T2 Interrupt subsystem */
|
|
if (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 */
|
|
{ "twl5030", 0 }, /* T2 updated */
|
|
{ /* 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");
|