/* * twl_core.c - driver for TWL4030/TWL5030/TWL60X0/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@nokia.com> * * Code cleanup and modifications to IRQ handler. * by syed khasim <x0khasim@ti.com> * * 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/init.h> #include <linux/mutex.h> #include <linux/platform_device.h> #include <linux/regmap.h> #include <linux/clk.h> #include <linux/err.h> #include <linux/device.h> #include <linux/of.h> #include <linux/of_irq.h> #include <linux/of_platform.h> #include <linux/irq.h> #include <linux/irqdomain.h> #include <linux/regulator/machine.h> #include <linux/i2c.h> #include <linux/mfd/twl.h> /* Register descriptions for audio */ #include <linux/mfd/twl4030-audio.h> #include "twl-core.h" /* * The TWL4030 "Triton 2" is one of a family of a multi-function "Power * Management and System Companion Device" chips originally designed for * use in OMAP2 and OMAP 3 based systems. Its control interfaces use I2C, * often at around 3 Mbit/sec, including for interrupt handling. * * This driver core provides genirq support for the interrupts emitted, * by the various modules, and exports register access primitives. * * FIXME this driver currently requires use of the first interrupt line * (and associated registers). */ #define DRIVER_NAME "twl" /* Triton Core internal information (BEGIN) */ /* Base Address defns for twl4030_map[] */ /* subchip/slave 0 - USB ID */ #define TWL4030_BASEADD_USB 0x0000 /* subchip/slave 1 - 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 /* subchip/slave 2 - 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_PWM 0x00F8 #define TWL4030_BASEADD_KEYPAD 0x00D2 #define TWL5031_BASEADD_ACCESSORY 0x0074 /* Replaces Main Charge */ #define TWL5031_BASEADD_INTERRUPTS 0x00B9 /* Different than TWL4030's one */ /* subchip/slave 3 - 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_DCDC_GLOBAL_CFG 0x06 #define SMARTREFLEX_ENABLE BIT(3) #define TWL4030_BASEADD_RTC 0x001C #define TWL4030_BASEADD_SECURED_REG 0x0000 /* Triton Core internal information (END) */ /* subchip/slave 0 0x48 - POWER */ #define TWL6030_BASEADD_RTC 0x0000 #define TWL6030_BASEADD_SECURED_REG 0x0017 #define TWL6030_BASEADD_PM_MASTER 0x001F #define TWL6030_BASEADD_PM_SLAVE_MISC 0x0030 /* PM_RECEIVER */ #define TWL6030_BASEADD_PM_MISC 0x00E2 #define TWL6030_BASEADD_PM_PUPD 0x00F0 /* subchip/slave 1 0x49 - FEATURE */ #define TWL6030_BASEADD_USB 0x0000 #define TWL6030_BASEADD_GPADC_CTRL 0x002E #define TWL6030_BASEADD_AUX 0x0090 #define TWL6030_BASEADD_PWM 0x00BA #define TWL6030_BASEADD_GASGAUGE 0x00C0 #define TWL6030_BASEADD_PIH 0x00D0 #define TWL6030_BASEADD_CHARGER 0x00E0 #define TWL6032_BASEADD_CHARGER 0x00DA #define TWL6030_BASEADD_LED 0x00F4 /* subchip/slave 2 0x4A - DFT */ #define TWL6030_BASEADD_DIEID 0x00C0 /* subchip/slave 3 0x4B - AUDIO */ #define TWL6030_BASEADD_AUDIO 0x0000 #define TWL6030_BASEADD_RSV 0x0000 #define TWL6030_BASEADD_ZERO 0x0000 /* Few power values */ #define R_CFG_BOOT 0x05 /* some fields in R_CFG_BOOT */ #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) #define CK32K_LOWPWR_EN (1 << 7) /*----------------------------------------------------------------------*/ /* Structure for each TWL4030/TWL6030 Slave */ struct twl_client { struct i2c_client *client; struct regmap *regmap; }; /* mapping the module id to slave id and base address */ struct twl_mapping { unsigned char sid; /* Slave ID */ unsigned char base; /* base address */ }; struct twl_private { bool ready; /* The core driver is ready to be used */ u32 twl_idcode; /* TWL IDCODE Register value */ unsigned int twl_id; struct twl_mapping *twl_map; struct twl_client *twl_modules; }; static struct twl_private *twl_priv; static struct twl_mapping twl4030_map[] = { /* * NOTE: don't change this table without updating the * <linux/mfd/twl.h> defines for TWL4030_MODULE_* * so they continue to match the order in this table. */ /* Common IPs */ { 0, TWL4030_BASEADD_USB }, { 1, TWL4030_BASEADD_PIH }, { 2, TWL4030_BASEADD_MAIN_CHARGE }, { 3, TWL4030_BASEADD_PM_MASTER }, { 3, TWL4030_BASEADD_PM_RECEIVER }, { 3, TWL4030_BASEADD_RTC }, { 2, TWL4030_BASEADD_PWM }, { 2, TWL4030_BASEADD_LED }, { 3, TWL4030_BASEADD_SECURED_REG }, /* TWL4030 specific IPs */ { 1, TWL4030_BASEADD_AUDIO_VOICE }, { 1, TWL4030_BASEADD_GPIO }, { 1, TWL4030_BASEADD_INTBR }, { 1, TWL4030_BASEADD_TEST }, { 2, TWL4030_BASEADD_KEYPAD }, { 2, TWL4030_BASEADD_MADC }, { 2, TWL4030_BASEADD_INTERRUPTS }, { 2, TWL4030_BASEADD_PRECHARGE }, { 3, TWL4030_BASEADD_BACKUP }, { 3, TWL4030_BASEADD_INT }, { 2, TWL5031_BASEADD_ACCESSORY }, { 2, TWL5031_BASEADD_INTERRUPTS }, }; static const struct reg_default twl4030_49_defaults[] = { /* Audio Registers */ { 0x01, 0x00}, /* CODEC_MODE */ { 0x02, 0x00}, /* OPTION */ /* 0x03 Unused */ { 0x04, 0x00}, /* MICBIAS_CTL */ { 0x05, 0x00}, /* ANAMICL */ { 0x06, 0x00}, /* ANAMICR */ { 0x07, 0x00}, /* AVADC_CTL */ { 0x08, 0x00}, /* ADCMICSEL */ { 0x09, 0x00}, /* DIGMIXING */ { 0x0a, 0x0f}, /* ATXL1PGA */ { 0x0b, 0x0f}, /* ATXR1PGA */ { 0x0c, 0x0f}, /* AVTXL2PGA */ { 0x0d, 0x0f}, /* AVTXR2PGA */ { 0x0e, 0x00}, /* AUDIO_IF */ { 0x0f, 0x00}, /* VOICE_IF */ { 0x10, 0x3f}, /* ARXR1PGA */ { 0x11, 0x3f}, /* ARXL1PGA */ { 0x12, 0x3f}, /* ARXR2PGA */ { 0x13, 0x3f}, /* ARXL2PGA */ { 0x14, 0x25}, /* VRXPGA */ { 0x15, 0x00}, /* VSTPGA */ { 0x16, 0x00}, /* VRX2ARXPGA */ { 0x17, 0x00}, /* AVDAC_CTL */ { 0x18, 0x00}, /* ARX2VTXPGA */ { 0x19, 0x32}, /* ARXL1_APGA_CTL*/ { 0x1a, 0x32}, /* ARXR1_APGA_CTL*/ { 0x1b, 0x32}, /* ARXL2_APGA_CTL*/ { 0x1c, 0x32}, /* ARXR2_APGA_CTL*/ { 0x1d, 0x00}, /* ATX2ARXPGA */ { 0x1e, 0x00}, /* BT_IF */ { 0x1f, 0x55}, /* BTPGA */ { 0x20, 0x00}, /* BTSTPGA */ { 0x21, 0x00}, /* EAR_CTL */ { 0x22, 0x00}, /* HS_SEL */ { 0x23, 0x00}, /* HS_GAIN_SET */ { 0x24, 0x00}, /* HS_POPN_SET */ { 0x25, 0x00}, /* PREDL_CTL */ { 0x26, 0x00}, /* PREDR_CTL */ { 0x27, 0x00}, /* PRECKL_CTL */ { 0x28, 0x00}, /* PRECKR_CTL */ { 0x29, 0x00}, /* HFL_CTL */ { 0x2a, 0x00}, /* HFR_CTL */ { 0x2b, 0x05}, /* ALC_CTL */ { 0x2c, 0x00}, /* ALC_SET1 */ { 0x2d, 0x00}, /* ALC_SET2 */ { 0x2e, 0x00}, /* BOOST_CTL */ { 0x2f, 0x00}, /* SOFTVOL_CTL */ { 0x30, 0x13}, /* DTMF_FREQSEL */ { 0x31, 0x00}, /* DTMF_TONEXT1H */ { 0x32, 0x00}, /* DTMF_TONEXT1L */ { 0x33, 0x00}, /* DTMF_TONEXT2H */ { 0x34, 0x00}, /* DTMF_TONEXT2L */ { 0x35, 0x79}, /* DTMF_TONOFF */ { 0x36, 0x11}, /* DTMF_WANONOFF */ { 0x37, 0x00}, /* I2S_RX_SCRAMBLE_H */ { 0x38, 0x00}, /* I2S_RX_SCRAMBLE_M */ { 0x39, 0x00}, /* I2S_RX_SCRAMBLE_L */ { 0x3a, 0x06}, /* APLL_CTL */ { 0x3b, 0x00}, /* DTMF_CTL */ { 0x3c, 0x44}, /* DTMF_PGA_CTL2 (0x3C) */ { 0x3d, 0x69}, /* DTMF_PGA_CTL1 (0x3D) */ { 0x3e, 0x00}, /* MISC_SET_1 */ { 0x3f, 0x00}, /* PCMBTMUX */ /* 0x40 - 0x42 Unused */ { 0x43, 0x00}, /* RX_PATH_SEL */ { 0x44, 0x32}, /* VDL_APGA_CTL */ { 0x45, 0x00}, /* VIBRA_CTL */ { 0x46, 0x00}, /* VIBRA_SET */ { 0x47, 0x00}, /* VIBRA_PWM_SET */ { 0x48, 0x00}, /* ANAMIC_GAIN */ { 0x49, 0x00}, /* MISC_SET_2 */ /* End of Audio Registers */ }; static bool twl4030_49_nop_reg(struct device *dev, unsigned int reg) { switch (reg) { case 0x00: case 0x03: case 0x40: case 0x41: case 0x42: return false; default: return true; } } static const struct regmap_range twl4030_49_volatile_ranges[] = { regmap_reg_range(TWL4030_BASEADD_TEST, 0xff), }; static const struct regmap_access_table twl4030_49_volatile_table = { .yes_ranges = twl4030_49_volatile_ranges, .n_yes_ranges = ARRAY_SIZE(twl4030_49_volatile_ranges), }; static const struct regmap_config twl4030_regmap_config[4] = { { /* Address 0x48 */ .reg_bits = 8, .val_bits = 8, .max_register = 0xff, }, { /* Address 0x49 */ .reg_bits = 8, .val_bits = 8, .max_register = 0xff, .readable_reg = twl4030_49_nop_reg, .writeable_reg = twl4030_49_nop_reg, .volatile_table = &twl4030_49_volatile_table, .reg_defaults = twl4030_49_defaults, .num_reg_defaults = ARRAY_SIZE(twl4030_49_defaults), .cache_type = REGCACHE_RBTREE, }, { /* Address 0x4a */ .reg_bits = 8, .val_bits = 8, .max_register = 0xff, }, { /* Address 0x4b */ .reg_bits = 8, .val_bits = 8, .max_register = 0xff, }, }; static struct twl_mapping twl6030_map[] = { /* * NOTE: don't change this table without updating the * <linux/mfd/twl.h> defines for TWL4030_MODULE_* * so they continue to match the order in this table. */ /* Common IPs */ { 1, TWL6030_BASEADD_USB }, { 1, TWL6030_BASEADD_PIH }, { 1, TWL6030_BASEADD_CHARGER }, { 0, TWL6030_BASEADD_PM_MASTER }, { 0, TWL6030_BASEADD_PM_SLAVE_MISC }, { 0, TWL6030_BASEADD_RTC }, { 1, TWL6030_BASEADD_PWM }, { 1, TWL6030_BASEADD_LED }, { 0, TWL6030_BASEADD_SECURED_REG }, /* TWL6030 specific IPs */ { 0, TWL6030_BASEADD_ZERO }, { 1, TWL6030_BASEADD_ZERO }, { 2, TWL6030_BASEADD_ZERO }, { 1, TWL6030_BASEADD_GPADC_CTRL }, { 1, TWL6030_BASEADD_GASGAUGE }, }; static const struct regmap_config twl6030_regmap_config[3] = { { /* Address 0x48 */ .reg_bits = 8, .val_bits = 8, .max_register = 0xff, }, { /* Address 0x49 */ .reg_bits = 8, .val_bits = 8, .max_register = 0xff, }, { /* Address 0x4a */ .reg_bits = 8, .val_bits = 8, .max_register = 0xff, }, }; /*----------------------------------------------------------------------*/ static inline int twl_get_num_slaves(void) { if (twl_class_is_4030()) return 4; /* TWL4030 class have four slave address */ else return 3; /* TWL6030 class have three slave address */ } static inline int twl_get_last_module(void) { if (twl_class_is_4030()) return TWL4030_MODULE_LAST; else return TWL6030_MODULE_LAST; } /* Exported Functions */ unsigned int twl_rev(void) { return twl_priv ? twl_priv->twl_id : 0; } EXPORT_SYMBOL(twl_rev); /** * twl_get_regmap - Get the regmap associated with the given module * @mod_no: module number * * Returns the regmap pointer or NULL in case of failure. */ static struct regmap *twl_get_regmap(u8 mod_no) { int sid; struct twl_client *twl; if (unlikely(!twl_priv || !twl_priv->ready)) { pr_err("%s: not initialized\n", DRIVER_NAME); return NULL; } if (unlikely(mod_no >= twl_get_last_module())) { pr_err("%s: invalid module number %d\n", DRIVER_NAME, mod_no); return NULL; } sid = twl_priv->twl_map[mod_no].sid; twl = &twl_priv->twl_modules[sid]; return twl->regmap; } /** * twl_i2c_write - Writes a n bit register in TWL4030/TWL5030/TWL60X0 * @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 * * Returns 0 on success or else a negative error code. */ int twl_i2c_write(u8 mod_no, u8 *value, u8 reg, unsigned num_bytes) { struct regmap *regmap = twl_get_regmap(mod_no); int ret; if (!regmap) return -EPERM; ret = regmap_bulk_write(regmap, twl_priv->twl_map[mod_no].base + reg, value, num_bytes); if (ret) pr_err("%s: Write failed (mod %d, reg 0x%02x count %d)\n", DRIVER_NAME, mod_no, reg, num_bytes); return ret; } EXPORT_SYMBOL(twl_i2c_write); /** * twl_i2c_read - Reads a n bit register in TWL4030/TWL5030/TWL60X0 * @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 0 on success or else a negative error code. */ int twl_i2c_read(u8 mod_no, u8 *value, u8 reg, unsigned num_bytes) { struct regmap *regmap = twl_get_regmap(mod_no); int ret; if (!regmap) return -EPERM; ret = regmap_bulk_read(regmap, twl_priv->twl_map[mod_no].base + reg, value, num_bytes); if (ret) pr_err("%s: Read failed (mod %d, reg 0x%02x count %d)\n", DRIVER_NAME, mod_no, reg, num_bytes); return ret; } EXPORT_SYMBOL(twl_i2c_read); /** * twl_regcache_bypass - Configure the regcache bypass for the regmap associated * with the module * @mod_no: module number * @enable: Regcache bypass state * * Returns 0 else failure. */ int twl_set_regcache_bypass(u8 mod_no, bool enable) { struct regmap *regmap = twl_get_regmap(mod_no); if (!regmap) return -EPERM; regcache_cache_bypass(regmap, enable); return 0; } EXPORT_SYMBOL(twl_set_regcache_bypass); /*----------------------------------------------------------------------*/ /** * twl_read_idcode_register - API to read the IDCODE register. * * Unlocks the IDCODE register and read the 32 bit value. */ static int twl_read_idcode_register(void) { int err; err = twl_i2c_write_u8(TWL4030_MODULE_INTBR, TWL_EEPROM_R_UNLOCK, REG_UNLOCK_TEST_REG); if (err) { pr_err("TWL4030 Unable to unlock IDCODE registers -%d\n", err); goto fail; } err = twl_i2c_read(TWL4030_MODULE_INTBR, (u8 *)(&twl_priv->twl_idcode), REG_IDCODE_7_0, 4); if (err) { pr_err("TWL4030: unable to read IDCODE -%d\n", err); goto fail; } err = twl_i2c_write_u8(TWL4030_MODULE_INTBR, 0x0, REG_UNLOCK_TEST_REG); if (err) pr_err("TWL4030 Unable to relock IDCODE registers -%d\n", err); fail: return err; } /** * twl_get_type - API to get TWL Si type. * * Api to get the TWL Si type from IDCODE value. */ int twl_get_type(void) { return TWL_SIL_TYPE(twl_priv->twl_idcode); } EXPORT_SYMBOL_GPL(twl_get_type); /** * twl_get_version - API to get TWL Si version. * * Api to get the TWL Si version from IDCODE value. */ int twl_get_version(void) { return TWL_SIL_REV(twl_priv->twl_idcode); } EXPORT_SYMBOL_GPL(twl_get_version); /** * twl_get_hfclk_rate - API to get TWL external HFCLK clock rate. * * Api to get the TWL HFCLK rate based on BOOT_CFG register. */ int twl_get_hfclk_rate(void) { u8 ctrl; int rate; twl_i2c_read_u8(TWL_MODULE_PM_MASTER, &ctrl, R_CFG_BOOT); switch (ctrl & 0x3) { case HFCLK_FREQ_19p2_MHZ: rate = 19200000; break; case HFCLK_FREQ_26_MHZ: rate = 26000000; break; case HFCLK_FREQ_38p4_MHZ: rate = 38400000; break; default: pr_err("TWL4030: HFCLK is not configured\n"); rate = -EINVAL; break; } return rate; } EXPORT_SYMBOL_GPL(twl_get_hfclk_rate); static struct device * add_numbered_child(unsigned mod_no, const char *name, int num, void *pdata, unsigned pdata_len, bool can_wakeup, int irq0, int irq1) { struct platform_device *pdev; struct twl_client *twl; int status, sid; if (unlikely(mod_no >= twl_get_last_module())) { pr_err("%s: invalid module number %d\n", DRIVER_NAME, mod_no); return ERR_PTR(-EPERM); } sid = twl_priv->twl_map[mod_no].sid; twl = &twl_priv->twl_modules[sid]; pdev = platform_device_alloc(name, num); if (!pdev) return ERR_PTR(-ENOMEM); pdev->dev.parent = &twl->client->dev; if (pdata) { status = platform_device_add_data(pdev, pdata, pdata_len); if (status < 0) { dev_dbg(&pdev->dev, "can't add platform_data\n"); goto put_device; } } if (irq0) { struct resource r[2] = { { .start = irq0, .flags = IORESOURCE_IRQ, }, { .start = irq1, .flags = IORESOURCE_IRQ, }, }; status = platform_device_add_resources(pdev, r, irq1 ? 2 : 1); if (status < 0) { dev_dbg(&pdev->dev, "can't add irqs\n"); goto put_device; } } status = platform_device_add(pdev); if (status) goto put_device; device_init_wakeup(&pdev->dev, can_wakeup); return &pdev->dev; put_device: platform_device_put(pdev); dev_err(&twl->client->dev, "failed to add device %s\n", name); return ERR_PTR(status); } static inline struct device *add_child(unsigned mod_no, const char *name, void *pdata, unsigned pdata_len, bool can_wakeup, int irq0, int irq1) { return add_numbered_child(mod_no, name, -1, pdata, pdata_len, can_wakeup, irq0, irq1); } static struct device * add_regulator_linked(int num, struct regulator_init_data *pdata, struct regulator_consumer_supply *consumers, unsigned num_consumers, unsigned long features) { struct twl_regulator_driver_data drv_data; /* regulator framework demands init_data ... */ if (!pdata) return NULL; if (consumers) { pdata->consumer_supplies = consumers; pdata->num_consumer_supplies = num_consumers; } if (pdata->driver_data) { /* If we have existing drv_data, just add the flags */ struct twl_regulator_driver_data *tmp; tmp = pdata->driver_data; tmp->features |= features; } else { /* add new driver data struct, used only during init */ drv_data.features = features; drv_data.set_voltage = NULL; drv_data.get_voltage = NULL; drv_data.data = NULL; pdata->driver_data = &drv_data; } /* NOTE: we currently ignore regulator IRQs, e.g. for short circuits */ return add_numbered_child(TWL_MODULE_PM_MASTER, "twl_reg", num, pdata, sizeof(*pdata), false, 0, 0); } static struct device * add_regulator(int num, struct regulator_init_data *pdata, unsigned long features) { return add_regulator_linked(num, pdata, NULL, 0, features); } /* * NOTE: We know the first 8 IRQs after pdata->base_irq are * for the PIH, and the next are for the PWR_INT SIH, since * that's how twl_init_irq() sets things up. */ static int add_children(struct twl4030_platform_data *pdata, unsigned irq_base, unsigned long features) { struct device *child; if (IS_ENABLED(CONFIG_GPIO_TWL4030) && pdata->gpio) { child = add_child(TWL4030_MODULE_GPIO, "twl4030_gpio", pdata->gpio, sizeof(*pdata->gpio), false, irq_base + GPIO_INTR_OFFSET, 0); if (IS_ERR(child)) return PTR_ERR(child); } if (IS_ENABLED(CONFIG_KEYBOARD_TWL4030) && pdata->keypad) { child = add_child(TWL4030_MODULE_KEYPAD, "twl4030_keypad", pdata->keypad, sizeof(*pdata->keypad), true, irq_base + KEYPAD_INTR_OFFSET, 0); if (IS_ERR(child)) return PTR_ERR(child); } if (IS_ENABLED(CONFIG_TWL4030_MADC) && pdata->madc && twl_class_is_4030()) { child = add_child(TWL4030_MODULE_MADC, "twl4030_madc", pdata->madc, sizeof(*pdata->madc), true, irq_base + MADC_INTR_OFFSET, 0); if (IS_ERR(child)) return PTR_ERR(child); } if (IS_ENABLED(CONFIG_RTC_DRV_TWL4030)) { /* * REVISIT platform_data here currently might expose the * "msecure" line ... but for now we just expect board * setup to tell the chip "it's always ok to SET_TIME". * Eventually, Linux might become more aware of such * HW security concerns, and "least privilege". */ child = add_child(TWL_MODULE_RTC, "twl_rtc", NULL, 0, true, irq_base + RTC_INTR_OFFSET, 0); if (IS_ERR(child)) return PTR_ERR(child); } if (IS_ENABLED(CONFIG_PWM_TWL)) { child = add_child(TWL_MODULE_PWM, "twl-pwm", NULL, 0, false, 0, 0); if (IS_ERR(child)) return PTR_ERR(child); } if (IS_ENABLED(CONFIG_PWM_TWL_LED)) { child = add_child(TWL_MODULE_LED, "twl-pwmled", NULL, 0, false, 0, 0); if (IS_ERR(child)) return PTR_ERR(child); } if (IS_ENABLED(CONFIG_TWL4030_USB) && pdata->usb && twl_class_is_4030()) { static struct regulator_consumer_supply usb1v5 = { .supply = "usb1v5", }; static struct regulator_consumer_supply usb1v8 = { .supply = "usb1v8", }; static struct regulator_consumer_supply usb3v1 = { .supply = "usb3v1", }; /* First add the regulators so that they can be used by transceiver */ if (IS_ENABLED(CONFIG_REGULATOR_TWL4030)) { /* this is a template that gets copied */ struct regulator_init_data usb_fixed = { .constraints.valid_modes_mask = REGULATOR_MODE_NORMAL | REGULATOR_MODE_STANDBY, .constraints.valid_ops_mask = REGULATOR_CHANGE_MODE | REGULATOR_CHANGE_STATUS, }; child = add_regulator_linked(TWL4030_REG_VUSB1V5, &usb_fixed, &usb1v5, 1, features); if (IS_ERR(child)) return PTR_ERR(child); child = add_regulator_linked(TWL4030_REG_VUSB1V8, &usb_fixed, &usb1v8, 1, features); if (IS_ERR(child)) return PTR_ERR(child); child = add_regulator_linked(TWL4030_REG_VUSB3V1, &usb_fixed, &usb3v1, 1, features); if (IS_ERR(child)) return PTR_ERR(child); } child = add_child(TWL_MODULE_USB, "twl4030_usb", pdata->usb, sizeof(*pdata->usb), true, /* irq0 = USB_PRES, irq1 = USB */ irq_base + USB_PRES_INTR_OFFSET, irq_base + USB_INTR_OFFSET); if (IS_ERR(child)) return PTR_ERR(child); /* we need to connect regulators to this transceiver */ if (IS_ENABLED(CONFIG_REGULATOR_TWL4030) && child) { usb1v5.dev_name = dev_name(child); usb1v8.dev_name = dev_name(child); usb3v1.dev_name = dev_name(child); } } if (IS_ENABLED(CONFIG_TWL4030_WATCHDOG) && twl_class_is_4030()) { child = add_child(TWL_MODULE_PM_RECEIVER, "twl4030_wdt", NULL, 0, false, 0, 0); if (IS_ERR(child)) return PTR_ERR(child); } if (IS_ENABLED(CONFIG_INPUT_TWL4030_PWRBUTTON) && twl_class_is_4030()) { child = add_child(TWL_MODULE_PM_MASTER, "twl4030_pwrbutton", NULL, 0, true, irq_base + 8 + 0, 0); if (IS_ERR(child)) return PTR_ERR(child); } if (IS_ENABLED(CONFIG_MFD_TWL4030_AUDIO) && pdata->audio && twl_class_is_4030()) { child = add_child(TWL4030_MODULE_AUDIO_VOICE, "twl4030-audio", pdata->audio, sizeof(*pdata->audio), false, 0, 0); if (IS_ERR(child)) return PTR_ERR(child); } /* twl4030 regulators */ if (IS_ENABLED(CONFIG_REGULATOR_TWL4030) && twl_class_is_4030()) { child = add_regulator(TWL4030_REG_VPLL1, pdata->vpll1, features); if (IS_ERR(child)) return PTR_ERR(child); child = add_regulator(TWL4030_REG_VIO, pdata->vio, features); if (IS_ERR(child)) return PTR_ERR(child); child = add_regulator(TWL4030_REG_VDD1, pdata->vdd1, features); if (IS_ERR(child)) return PTR_ERR(child); child = add_regulator(TWL4030_REG_VDD2, pdata->vdd2, features); if (IS_ERR(child)) return PTR_ERR(child); child = add_regulator(TWL4030_REG_VMMC1, pdata->vmmc1, features); if (IS_ERR(child)) return PTR_ERR(child); child = add_regulator(TWL4030_REG_VDAC, pdata->vdac, features); if (IS_ERR(child)) return PTR_ERR(child); child = add_regulator((features & TWL4030_VAUX2) ? TWL4030_REG_VAUX2_4030 : TWL4030_REG_VAUX2, pdata->vaux2, features); if (IS_ERR(child)) return PTR_ERR(child); child = add_regulator(TWL4030_REG_VINTANA1, pdata->vintana1, features); if (IS_ERR(child)) return PTR_ERR(child); child = add_regulator(TWL4030_REG_VINTANA2, pdata->vintana2, features); if (IS_ERR(child)) return PTR_ERR(child); child = add_regulator(TWL4030_REG_VINTDIG, pdata->vintdig, features); if (IS_ERR(child)) return PTR_ERR(child); } /* maybe add LDOs that are omitted on cost-reduced parts */ if (IS_ENABLED(CONFIG_REGULATOR_TWL4030) && !(features & TPS_SUBSET) && twl_class_is_4030()) { child = add_regulator(TWL4030_REG_VPLL2, pdata->vpll2, features); if (IS_ERR(child)) return PTR_ERR(child); child = add_regulator(TWL4030_REG_VMMC2, pdata->vmmc2, features); if (IS_ERR(child)) return PTR_ERR(child); child = add_regulator(TWL4030_REG_VSIM, pdata->vsim, features); if (IS_ERR(child)) return PTR_ERR(child); child = add_regulator(TWL4030_REG_VAUX1, pdata->vaux1, features); if (IS_ERR(child)) return PTR_ERR(child); child = add_regulator(TWL4030_REG_VAUX3, pdata->vaux3, features); if (IS_ERR(child)) return PTR_ERR(child); child = add_regulator(TWL4030_REG_VAUX4, pdata->vaux4, features); if (IS_ERR(child)) return PTR_ERR(child); } if (IS_ENABLED(CONFIG_CHARGER_TWL4030) && pdata->bci && !(features & (TPS_SUBSET | TWL5031))) { child = add_child(TWL_MODULE_MAIN_CHARGE, "twl4030_bci", pdata->bci, sizeof(*pdata->bci), false, /* irq0 = CHG_PRES, irq1 = BCI */ irq_base + BCI_PRES_INTR_OFFSET, irq_base + BCI_INTR_OFFSET); if (IS_ERR(child)) return PTR_ERR(child); } if (IS_ENABLED(CONFIG_TWL4030_POWER) && pdata->power) { child = add_child(TWL_MODULE_PM_MASTER, "twl4030_power", pdata->power, sizeof(*pdata->power), false, 0, 0); if (IS_ERR(child)) return PTR_ERR(child); } return 0; } /*----------------------------------------------------------------------*/ /* * 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 = twl_i2c_write_u8(TWL_MODULE_PM_MASTER, 0, TWL4030_PM_MASTER_PROTECT_KEY); return e; } static inline int __init unprotect_pm_master(void) { int e = 0; e |= twl_i2c_write_u8(TWL_MODULE_PM_MASTER, TWL4030_PM_MASTER_KEY_CFG1, TWL4030_PM_MASTER_PROTECT_KEY); e |= twl_i2c_write_u8(TWL_MODULE_PM_MASTER, TWL4030_PM_MASTER_KEY_CFG2, TWL4030_PM_MASTER_PROTECT_KEY); return e; } static void clocks_init(struct device *dev, struct twl4030_clock_init_data *clock) { int e = 0; struct clk *osc; u32 rate; u8 ctrl = HFCLK_FREQ_26_MHZ; osc = clk_get(dev, "fck"); if (IS_ERR(osc)) { printk(KERN_WARNING "Skipping twl 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; if (clock && clock->ck32k_lowpwr_enable) ctrl |= CK32K_LOWPWR_EN; e |= unprotect_pm_master(); /* effect->MADC+USB ck en */ e |= twl_i2c_write_u8(TWL_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); } /*----------------------------------------------------------------------*/ static int twl_remove(struct i2c_client *client) { unsigned i, num_slaves; int status; if (twl_class_is_4030()) status = twl4030_exit_irq(); else status = twl6030_exit_irq(); if (status < 0) return status; num_slaves = twl_get_num_slaves(); for (i = 0; i < num_slaves; i++) { struct twl_client *twl = &twl_priv->twl_modules[i]; if (twl->client && twl->client != client) i2c_unregister_device(twl->client); twl->client = NULL; } twl_priv->ready = false; return 0; } static struct of_dev_auxdata twl_auxdata_lookup[] = { OF_DEV_AUXDATA("ti,twl4030-gpio", 0, "twl4030-gpio", NULL), { /* sentinel */ }, }; /* NOTE: This driver only handles a single twl4030/tps659x0 chip */ static int twl_probe(struct i2c_client *client, const struct i2c_device_id *id) { struct twl4030_platform_data *pdata = dev_get_platdata(&client->dev); struct device_node *node = client->dev.of_node; struct platform_device *pdev; const struct regmap_config *twl_regmap_config; int irq_base = 0; int status; unsigned i, num_slaves; if (!node && !pdata) { dev_err(&client->dev, "no platform data\n"); return -EINVAL; } if (twl_priv) { dev_dbg(&client->dev, "only one instance of %s allowed\n", DRIVER_NAME); return -EBUSY; } pdev = platform_device_alloc(DRIVER_NAME, -1); if (!pdev) { dev_err(&client->dev, "can't alloc pdev\n"); return -ENOMEM; } status = platform_device_add(pdev); if (status) { platform_device_put(pdev); return status; } if (i2c_check_functionality(client->adapter, I2C_FUNC_I2C) == 0) { dev_dbg(&client->dev, "can't talk I2C?\n"); status = -EIO; goto free; } twl_priv = devm_kzalloc(&client->dev, sizeof(struct twl_private), GFP_KERNEL); if (!twl_priv) { status = -ENOMEM; goto free; } if ((id->driver_data) & TWL6030_CLASS) { twl_priv->twl_id = TWL6030_CLASS_ID; twl_priv->twl_map = &twl6030_map[0]; /* The charger base address is different in twl6032 */ if ((id->driver_data) & TWL6032_SUBCLASS) twl_priv->twl_map[TWL_MODULE_MAIN_CHARGE].base = TWL6032_BASEADD_CHARGER; twl_regmap_config = twl6030_regmap_config; } else { twl_priv->twl_id = TWL4030_CLASS_ID; twl_priv->twl_map = &twl4030_map[0]; twl_regmap_config = twl4030_regmap_config; } num_slaves = twl_get_num_slaves(); twl_priv->twl_modules = devm_kcalloc(&client->dev, num_slaves, sizeof(struct twl_client), GFP_KERNEL); if (!twl_priv->twl_modules) { status = -ENOMEM; goto free; } for (i = 0; i < num_slaves; i++) { struct twl_client *twl = &twl_priv->twl_modules[i]; if (i == 0) { twl->client = client; } else { twl->client = i2c_new_dummy(client->adapter, client->addr + i); if (!twl->client) { dev_err(&client->dev, "can't attach client %d\n", i); status = -ENOMEM; goto fail; } } twl->regmap = devm_regmap_init_i2c(twl->client, &twl_regmap_config[i]); if (IS_ERR(twl->regmap)) { status = PTR_ERR(twl->regmap); dev_err(&client->dev, "Failed to allocate regmap %d, err: %d\n", i, status); goto fail; } } twl_priv->ready = true; /* setup clock framework */ clocks_init(&client->dev, pdata ? pdata->clock : NULL); /* read TWL IDCODE Register */ if (twl_class_is_4030()) { status = twl_read_idcode_register(); WARN(status < 0, "Error: reading twl_idcode register value\n"); } /* Maybe init the T2 Interrupt subsystem */ if (client->irq) { if (twl_class_is_4030()) { twl4030_init_chip_irq(id->name); irq_base = twl4030_init_irq(&client->dev, client->irq); } else { irq_base = twl6030_init_irq(&client->dev, client->irq); } if (irq_base < 0) { status = irq_base; goto fail; } } /* * Disable TWL4030/TWL5030 I2C Pull-up on I2C1 and I2C4(SR) interface. * Program I2C_SCL_CTRL_PU(bit 0)=0, I2C_SDA_CTRL_PU (bit 2)=0, * SR_I2C_SCL_CTRL_PU(bit 4)=0 and SR_I2C_SDA_CTRL_PU(bit 6)=0. * * Also, always enable SmartReflex bit as that's needed for omaps to * to do anything over I2C4 for voltage scaling even if SmartReflex * is disabled. Without the SmartReflex bit omap sys_clkreq idle * signal will never trigger for retention idle. */ if (twl_class_is_4030()) { u8 temp; twl_i2c_read_u8(TWL4030_MODULE_INTBR, &temp, REG_GPPUPDCTR1); temp &= ~(SR_I2C_SDA_CTRL_PU | SR_I2C_SCL_CTRL_PU | \ I2C_SDA_CTRL_PU | I2C_SCL_CTRL_PU); twl_i2c_write_u8(TWL4030_MODULE_INTBR, temp, REG_GPPUPDCTR1); twl_i2c_read_u8(TWL_MODULE_PM_RECEIVER, &temp, TWL4030_DCDC_GLOBAL_CFG); temp |= SMARTREFLEX_ENABLE; twl_i2c_write_u8(TWL_MODULE_PM_RECEIVER, temp, TWL4030_DCDC_GLOBAL_CFG); } if (node) { if (pdata) twl_auxdata_lookup[0].platform_data = pdata->gpio; status = of_platform_populate(node, NULL, twl_auxdata_lookup, &client->dev); } else { status = add_children(pdata, irq_base, id->driver_data); } fail: if (status < 0) twl_remove(client); free: if (status < 0) platform_device_unregister(pdev); return status; } static const struct i2c_device_id twl_ids[] = { { "twl4030", TWL4030_VAUX2 }, /* "Triton 2" */ { "twl5030", 0 }, /* T2 updated */ { "twl5031", TWL5031 }, /* TWL5030 updated */ { "tps65950", 0 }, /* catalog version of twl5030 */ { "tps65930", TPS_SUBSET }, /* fewer LDOs and DACs; no charger */ { "tps65920", TPS_SUBSET }, /* fewer LDOs; no codec or charger */ { "tps65921", TPS_SUBSET }, /* fewer LDOs; no codec, no LED and vibrator. Charger in USB module*/ { "twl6030", TWL6030_CLASS }, /* "Phoenix power chip" */ { "twl6032", TWL6030_CLASS | TWL6032_SUBCLASS }, /* "Phoenix lite" */ { /* end of list */ }, }; /* One Client Driver , 4 Clients */ static struct i2c_driver twl_driver = { .driver.name = DRIVER_NAME, .id_table = twl_ids, .probe = twl_probe, .remove = twl_remove, }; builtin_i2c_driver(twl_driver);