diff options
Diffstat (limited to 'drivers/mfd/twl-core.c')
| -rw-r--r-- | drivers/mfd/twl-core.c | 929 |
1 files changed, 929 insertions, 0 deletions
diff --git a/drivers/mfd/twl-core.c b/drivers/mfd/twl-core.c new file mode 100644 index 000000000000..44714f5cf495 --- /dev/null +++ b/drivers/mfd/twl-core.c @@ -0,0 +1,929 @@ +/* + * 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@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/clk.h> +#include <linux/err.h> + +#include <linux/regulator/machine.h> + +#include <linux/i2c.h> +#include <linux/i2c/twl.h> + +#if defined(CONFIG_ARCH_OMAP2) || defined(CONFIG_ARCH_OMAP3) +#include <plat/cpu.h> +#endif + +/* + * 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 "twl4030" + +#if defined(CONFIG_TWL4030_BCI_BATTERY) || \ + defined(CONFIG_TWL4030_BCI_BATTERY_MODULE) +#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_REGULATOR_TWL4030) \ + || defined(CONFIG_REGULATOR_TWL4030_MODULE) +#define twl_has_regulator() true +#else +#define twl_has_regulator() false +#endif + +#if defined(CONFIG_TWL4030_MADC) || defined(CONFIG_TWL4030_MADC_MODULE) +#define twl_has_madc() true +#else +#define twl_has_madc() false +#endif + +#ifdef CONFIG_TWL4030_POWER +#define twl_has_power() true +#else +#define twl_has_power() 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 + +#if defined(CONFIG_TWL4030_WATCHDOG) || \ + defined(CONFIG_TWL4030_WATCHDOG_MODULE) +#define twl_has_watchdog() true +#else +#define twl_has_watchdog() false +#endif + +#if defined(CONFIG_TWL4030_CODEC) || defined(CONFIG_TWL4030_CODEC_MODULE) +#define twl_has_codec() true +#else +#define twl_has_codec() false +#endif + +/* Triton Core internal information (BEGIN) */ + +/* Last - for index max*/ +#define TWL4030_MODULE_LAST TWL4030_MODULE_SECURED_REG + +#define TWL4030_NUM_SLAVES 4 + +#if defined(CONFIG_INPUT_TWL4030_PWRBUTTON) \ + || defined(CONFIG_INPUT_TWL4030_PWBUTTON_MODULE) +#define twl_has_pwrbutton() true +#else +#define twl_has_pwrbutton() false +#endif + +/* 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_PWM0 0x00F8 +#define TWL4030_BASEADD_PWM1 0x00FB +#define TWL4030_BASEADD_PWMA 0x00EF +#define TWL4030_BASEADD_PWMB 0x00F1 +#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_BASEADD_RTC 0x001C +#define TWL4030_BASEADD_SECURED_REG 0x0000 + +/* Triton Core internal information (END) */ + + +/* Few power values */ +#define R_CFG_BOOT 0x05 +#define R_PROTECT_KEY 0x0E + +/* access control values for R_PROTECT_KEY */ +#define KEY_UNLOCK1 0xce +#define KEY_UNLOCK2 0xec +#define KEY_LOCK 0x00 + +/* 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) + + +/* chip-specific feature flags, for i2c_device_id.driver_data */ +#define TWL4030_VAUX2 BIT(0) /* pre-5030 voltage ranges */ +#define TPS_SUBSET BIT(1) /* tps659[23]0 have fewer LDOs */ +#define TWL5031 BIT(2) /* twl5031 has different registers */ + +/*----------------------------------------------------------------------*/ + +/* is driver active, bound to a chip? */ +static bool inuse; + +/* Structure for each TWL4030 Slave */ +struct twl4030_client { + struct i2c_client *client; + u8 address; + + /* 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; +}; + +static struct twl4030_client twl4030_modules[TWL4030_NUM_SLAVES]; + + +/* mapping the module id to slave id and base address */ +struct twl4030mapping { + unsigned char sid; /* Slave ID */ + unsigned char base; /* base address */ +}; + +static struct twl4030mapping twl4030_map[TWL4030_MODULE_LAST + 1] = { + /* + * NOTE: don't change this table without updating the + * <linux/i2c/twl4030.h> defines for TWL4030_MODULE_* + * so they continue to match the order in this table. + */ + + { 0, TWL4030_BASEADD_USB }, + + { 1, TWL4030_BASEADD_AUDIO_VOICE }, + { 1, TWL4030_BASEADD_GPIO }, + { 1, TWL4030_BASEADD_INTBR }, + { 1, TWL4030_BASEADD_PIH }, + { 1, TWL4030_BASEADD_TEST }, + + { 2, TWL4030_BASEADD_KEYPAD }, + { 2, TWL4030_BASEADD_MADC }, + { 2, TWL4030_BASEADD_INTERRUPTS }, + { 2, TWL4030_BASEADD_LED }, + { 2, TWL4030_BASEADD_MAIN_CHARGE }, + { 2, TWL4030_BASEADD_PRECHARGE }, + { 2, TWL4030_BASEADD_PWM0 }, + { 2, TWL4030_BASEADD_PWM1 }, + { 2, TWL4030_BASEADD_PWMA }, + { 2, TWL4030_BASEADD_PWMB }, + { 2, TWL5031_BASEADD_ACCESSORY }, + { 2, TWL5031_BASEADD_INTERRUPTS }, + + { 3, TWL4030_BASEADD_BACKUP }, + { 3, TWL4030_BASEADD_INT }, + { 3, TWL4030_BASEADD_PM_MASTER }, + { 3, TWL4030_BASEADD_PM_RECEIVER }, + { 3, TWL4030_BASEADD_RTC }, + { 3, TWL4030_BASEADD_SECURED_REG }, +}; + +/*----------------------------------------------------------------------*/ + +/* Exported 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, unsigned 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(!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); + + /* i2c_transfer returns number of messages transferred */ + if (ret != 1) { + pr_err("%s: i2c_write failed to transfer all messages\n", + DRIVER_NAME); + if (ret < 0) + return ret; + else + return -EIO; + } else { + return 0; + } +} +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, unsigned 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(!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); + + /* i2c_transfer returns number of messages transferred */ + if (ret != 2) { + pr_err("%s: i2c_read failed to transfer all messages\n", + DRIVER_NAME); + if (ret < 0) + return ret; + else + return -EIO; + } else { + return 0; + } +} +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 struct device * +add_numbered_child(unsigned chip, const char *name, int num, + void *pdata, unsigned pdata_len, + bool can_wakeup, int irq0, int irq1) +{ + struct platform_device *pdev; + struct twl4030_client *twl = &twl4030_modules[chip]; + int status; + + pdev = platform_device_alloc(name, num); + if (!pdev) { + dev_dbg(&twl->client->dev, "can't alloc dev\n"); + status = -ENOMEM; + goto err; + } + + device_init_wakeup(&pdev->dev, can_wakeup); + 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 err; + } + } + + 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 err; + } + } + + status = platform_device_add(pdev); + +err: + if (status < 0) { + platform_device_put(pdev); + dev_err(&twl->client->dev, "can't add %s dev\n", name); + return ERR_PTR(status); + } + return &pdev->dev; +} + +static inline struct device *add_child(unsigned chip, const char *name, + void *pdata, unsigned pdata_len, + bool can_wakeup, int irq0, int irq1) +{ + return add_numbered_child(chip, 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) +{ + /* regulator framework demands init_data ... */ + if (!pdata) + return NULL; + + if (consumers) { + pdata->consumer_supplies = consumers; + pdata->num_consumer_supplies = num_consumers; + } + + /* NOTE: we currently ignore regulator IRQs, e.g. for short circuits */ + return add_numbered_child(3, "twl4030_reg", num, + pdata, sizeof(*pdata), false, 0, 0); +} + +static struct device * +add_regulator(int num, struct regulator_init_data *pdata) +{ + return add_regulator_linked(num, pdata, NULL, 0); +} + +/* + * 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 long features) +{ + struct device *child; + + if (twl_has_bci() && pdata->bci && + !(features & (TPS_SUBSET | TWL5031))) { + child = add_child(3, "twl4030_bci", + pdata->bci, sizeof(*pdata->bci), + false, + /* irq0 = CHG_PRES, irq1 = BCI */ + pdata->irq_base + 8 + 1, pdata->irq_base + 2); + if (IS_ERR(child)) + return PTR_ERR(child); + } + + if (twl_has_gpio() && pdata->gpio) { + child = add_child(1, "twl4030_gpio", + pdata->gpio, sizeof(*pdata->gpio), + false, pdata->irq_base + 0, 0); + if (IS_ERR(child)) + return PTR_ERR(child); + } + + if (twl_has_keypad() && pdata->keypad) { + child = add_child(2, "twl4030_keypad", + pdata->keypad, sizeof(*pdata->keypad), + true, pdata->irq_base + 1, 0); + if (IS_ERR(child)) + return PTR_ERR(child); + } + + if (twl_has_madc() && pdata->madc) { + child = add_child(2, "twl4030_madc", + pdata->madc, sizeof(*pdata->madc), + true, pdata->irq_base + 3, 0); + if (IS_ERR(child)) + return PTR_ERR(child); + } + + if (twl_has_rtc()) { + /* + * 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(3, "twl4030_rtc", + NULL, 0, + true, pdata->irq_base + 8 + 3, 0); + if (IS_ERR(child)) + return PTR_ERR(child); + } + + if (twl_has_usb() && pdata->usb) { + + 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 (twl_has_regulator()) { + /* 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); + if (IS_ERR(child)) + return PTR_ERR(child); + + child = add_regulator_linked(TWL4030_REG_VUSB1V8, + &usb_fixed, &usb1v8, 1); + if (IS_ERR(child)) + return PTR_ERR(child); + + child = add_regulator_linked(TWL4030_REG_VUSB3V1, + &usb_fixed, &usb3v1, 1); + if (IS_ERR(child)) + return PTR_ERR(child); + + } + + child = add_child(0, "twl4030_usb", + pdata->usb, sizeof(*pdata->usb), + true, + /* irq0 = USB_PRES, irq1 = USB */ + pdata->irq_base + 8 + 2, pdata->irq_base + 4); + + if (IS_ERR(child)) + return PTR_ERR(child); + + /* we need to connect regulators to this transceiver */ + if (twl_has_regulator() && child) { + usb1v5.dev = child; + usb1v8.dev = child; + usb3v1.dev = child; + } + } + + if (twl_has_watchdog()) { + child = add_child(0, "twl4030_wdt", NULL, 0, false, 0, 0); + if (IS_ERR(child)) + return PTR_ERR(child); + } + + if (twl_has_pwrbutton()) { + child = add_child(1, "twl4030_pwrbutton", + NULL, 0, true, pdata->irq_base + 8 + 0, 0); + if (IS_ERR(child)) + return PTR_ERR(child); + } + + if (twl_has_codec() && pdata->codec) { + child = add_child(1, "twl4030_codec", + pdata->codec, sizeof(*pdata->codec), + false, 0, 0); + if (IS_ERR(child)) + return PTR_ERR(child); + } + + if (twl_has_regulator()) { + child = add_regulator(TWL4030_REG_VPLL1, pdata->vpll1); + if (IS_ERR(child)) + return PTR_ERR(child); + + child = add_regulator(TWL4030_REG_VIO, pdata->vio); + if (IS_ERR(child)) + return PTR_ERR(child); + + child = add_regulator(TWL4030_REG_VDD1, pdata->vdd1); + if (IS_ERR(child)) + return PTR_ERR(child); + + child = add_regulator(TWL4030_REG_VDD2, pdata->vdd2); + if (IS_ERR(child)) + return PTR_ERR(child); + + child = add_regulator(TWL4030_REG_VMMC1, pdata->vmmc1); + if (IS_ERR(child)) + return PTR_ERR(child); + + child = add_regulator(TWL4030_REG_VDAC, pdata->vdac); + if (IS_ERR(child)) + return PTR_ERR(child); + + child = add_regulator((features & TWL4030_VAUX2) + ? TWL4030_REG_VAUX2_4030 + : TWL4030_REG_VAUX2, + pdata->vaux2); + if (IS_ERR(child)) + return PTR_ERR(child); + + child = add_regulator(TWL4030_REG_VINTANA1, pdata->vintana1); + if (IS_ERR(child)) + return PTR_ERR(child); + + child = add_regulator(TWL4030_REG_VINTANA2, pdata->vintana2); + if (IS_ERR(child)) + return PTR_ERR(child); + + child = add_regulator(TWL4030_REG_VINTDIG, pdata->vintdig); + if (IS_ERR(child)) + return PTR_ERR(child); + } + + /* maybe add LDOs that are omitted on cost-reduced parts */ + if (twl_has_regulator() && !(features & TPS_SUBSET)) { + child = add_regulator(TWL4030_REG_VPLL2, pdata->vpll2); + if (IS_ERR(child)) + return PTR_ERR(child); + + child = add_regulator(TWL4030_REG_VMMC2, pdata->vmmc2); + if (IS_ERR(child)) + return PTR_ERR(child); + + child = add_regulator(TWL4030_REG_VSIM, pdata->vsim); + if (IS_ERR(child)) + return PTR_ERR(child); + + child = add_regulator(TWL4030_REG_VAUX1, pdata->vaux1); + if (IS_ERR(child)) + return PTR_ERR(child); + + child = add_regulator(TWL4030_REG_VAUX3, pdata->vaux3); + if (IS_ERR(child)) + return PTR_ERR(child); + + child = add_regulator(TWL4030_REG_VAUX4, pdata->vaux4); + 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 = 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 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; + +#if defined(CONFIG_ARCH_OMAP2) || defined(CONFIG_ARCH_OMAP3) + if (cpu_is_omap2430()) + osc = clk_get(dev, "osc_ck"); + else + osc = clk_get(dev, "osc_sys_ck"); + + 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); + +#else + /* REVISIT for non-OMAP systems, pass the clock rate from + * board init code, using platform_data. + */ + osc = ERR_PTR(-EIO); + + printk(KERN_WARNING "Skipping twl4030 internal clock init and " + "using bootloader value (unknown osc rate)\n"); + + return; +#endif + + 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 |= 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); +} + +/*----------------------------------------------------------------------*/ + +int twl_init_irq(int irq_num, unsigned irq_base, unsigned irq_end); +int twl_exit_irq(void); +int twl_init_chip_irq(const char *chip); + +static int twl4030_remove(struct i2c_client *client) +{ + unsigned i; + int status; + + status = twl_exit_irq(); + if (status < 0) + return status; + + 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 __init +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) { + 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(&client->dev, + "can't attach client %d\n", i); + status = -ENOMEM; + goto fail; + } + } + mutex_init(&twl->xfer_lock); + } + inuse = true; + + /* setup clock framework */ + clocks_init(&client->dev, pdata->clock); + + /* load power event scripts */ + if (twl_has_power() && pdata->power) + twl4030_power_init(pdata->power); + + /* Maybe init the T2 Interrupt subsystem */ + if (client->irq + && pdata->irq_base + && pdata->irq_end > pdata->irq_base) { + twl_init_chip_irq(id->name); + status = twl_init_irq(client->irq, pdata->irq_base, pdata->irq_end); + if (status < 0) + goto fail; + } + + status = add_children(pdata, id->driver_data); +fail: + if (status < 0) + twl4030_remove(client); + return status; +} + +static const struct i2c_device_id twl4030_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 */ + { /* 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"); |