From 0c41839e98272a317d4af4dfcb54b599b2c3dcba Mon Sep 17 00:00:00 2001 From: Srinidhi Kasagar Date: Mon, 12 Oct 2009 17:11:52 +0200 Subject: [PATCH] mfd: add AB4500 driver This adds core driver support for AB4500 mixed signal multimedia & power management chip. This connects to U8500 on the SSP (pl022) and exports read/write functions for the device to get access to this chip. This also registers the client devices and sets the parent. Signed-off-by: srinidhi kasagar Acked-by: Andrea Gallo Reviewed-by: Mark Brown Reviewed-by: Jean-Christophe Signed-off-by: Samuel Ortiz --- drivers/mfd/Kconfig | 10 ++ drivers/mfd/Makefile | 1 + drivers/mfd/ab4500-core.c | 207 +++++++++++++++++++++++++++++ include/linux/mfd/ab4500.h | 262 +++++++++++++++++++++++++++++++++++++ 4 files changed, 480 insertions(+) create mode 100644 drivers/mfd/ab4500-core.c create mode 100644 include/linux/mfd/ab4500.h diff --git a/drivers/mfd/Kconfig b/drivers/mfd/Kconfig index 26a36f887357..2aea25ba7ba0 100644 --- a/drivers/mfd/Kconfig +++ b/drivers/mfd/Kconfig @@ -329,6 +329,16 @@ config MFD_88PM8607 individual components like voltage regulators, RTC and battery-charger under the corresponding menus. +config AB4500_CORE + tristate "ST-Ericsson's AB4500 Mixed Signal Power management chip" + depends on SPI + default y + help + Select this option to enable access to AB4500 power management + chip. This connects to U8500 on the SSP/SPI bus and exports + read/write functions for the devices to get access to this chip. + This chip embeds various other multimedia funtionalities as well. + endmenu menu "Multimedia Capabilities Port drivers" diff --git a/drivers/mfd/Makefile b/drivers/mfd/Makefile index 2596add427a2..1792b1ff8ffc 100644 --- a/drivers/mfd/Makefile +++ b/drivers/mfd/Makefile @@ -52,4 +52,5 @@ obj-$(CONFIG_PCF50633_ADC) += pcf50633-adc.o obj-$(CONFIG_PCF50633_GPIO) += pcf50633-gpio.o obj-$(CONFIG_AB3100_CORE) += ab3100-core.o obj-$(CONFIG_AB3100_OTP) += ab3100-otp.o +obj-$(CONFIG_AB4500_CORE) += ab4500-core.o obj-$(CONFIG_MFD_88PM8607) += 88pm8607.o diff --git a/drivers/mfd/ab4500-core.c b/drivers/mfd/ab4500-core.c new file mode 100644 index 000000000000..3ad91f7ee22b --- /dev/null +++ b/drivers/mfd/ab4500-core.c @@ -0,0 +1,207 @@ +/* + * Copyright (C) 2009 ST-Ericsson + * + * Author: Srinidhi KASAGAR + * + * This program is free software; you can redistribute it + * and/or modify it under the terms of the GNU General Public + * License version 2, as published by the Free Software Foundation. + * + * AB4500 is a companion power management chip used with U8500. + * On this platform, this is interfaced with SSP0 controller + * which is a ARM primecell pl022. + * + * At the moment the module just exports read/write features. + * Interrupt management to be added - TODO. + */ +#include +#include +#include +#include +#include +#include + +/* just required if probe fails, we need to + * unregister the device + */ +static struct spi_driver ab4500_driver; + +/* + * This funtion writes to any AB4500 registers using + * SPI protocol & before it writes it packs the data + * in the below 24 bit frame format + * + * *|------------------------------------| + * *| 23|22...18|17.......10|9|8|7......0| + * *| r/w bank adr data | + * * ------------------------------------ + * + * This function shouldn't be called from interrupt + * context + */ +int ab4500_write(struct ab4500 *ab4500, unsigned char block, + unsigned long addr, unsigned char data) +{ + struct spi_transfer xfer; + struct spi_message msg; + int err; + unsigned long spi_data = + block << 18 | addr << 10 | data; + + mutex_lock(&ab4500->lock); + ab4500->tx_buf[0] = spi_data; + ab4500->rx_buf[0] = 0; + + xfer.tx_buf = ab4500->tx_buf; + xfer.rx_buf = NULL; + xfer.len = sizeof(unsigned long); + + spi_message_init(&msg); + spi_message_add_tail(&xfer, &msg); + + err = spi_sync(ab4500->spi, &msg); + mutex_unlock(&ab4500->lock); + + return err; +} +EXPORT_SYMBOL(ab4500_write); + +int ab4500_read(struct ab4500 *ab4500, unsigned char block, + unsigned long addr) +{ + struct spi_transfer xfer; + struct spi_message msg; + unsigned long spi_data = + 1 << 23 | block << 18 | addr << 10; + + mutex_lock(&ab4500->lock); + ab4500->tx_buf[0] = spi_data; + ab4500->rx_buf[0] = 0; + + xfer.tx_buf = ab4500->tx_buf; + xfer.rx_buf = ab4500->rx_buf; + xfer.len = sizeof(unsigned long); + + spi_message_init(&msg); + spi_message_add_tail(&xfer, &msg); + + spi_sync(ab4500->spi, &msg); + mutex_unlock(&ab4500->lock); + + return ab4500->rx_buf[0]; +} +EXPORT_SYMBOL(ab4500_read); + +/* ref: ab3100 core */ +#define AB4500_DEVICE(devname, devid) \ +static struct platform_device ab4500_##devname##_device = { \ + .name = devid, \ + .id = -1, \ +} + +/* list of childern devices of ab4500 - all are + * not populated here - TODO + */ +AB4500_DEVICE(charger, "ab4500-charger"); +AB4500_DEVICE(audio, "ab4500-audio"); +AB4500_DEVICE(usb, "ab4500-usb"); +AB4500_DEVICE(tvout, "ab4500-tvout"); +AB4500_DEVICE(sim, "ab4500-sim"); +AB4500_DEVICE(gpadc, "ab4500-gpadc"); +AB4500_DEVICE(clkmgt, "ab4500-clkmgt"); +AB4500_DEVICE(misc, "ab4500-misc"); + +static struct platform_device *ab4500_platform_devs[] = { + &ab4500_charger_device, + &ab4500_audio_device, + &ab4500_usb_device, + &ab4500_tvout_device, + &ab4500_sim_device, + &ab4500_gpadc_device, + &ab4500_clkmgt_device, + &ab4500_misc_device, +}; + +static int __init ab4500_probe(struct spi_device *spi) +{ + struct ab4500 *ab4500; + unsigned char revision; + int err = 0; + int i; + + ab4500 = kzalloc(sizeof *ab4500, GFP_KERNEL); + if (!ab4500) { + dev_err(&spi->dev, "could not allocate AB4500\n"); + err = -ENOMEM; + goto not_detect; + } + + ab4500->spi = spi; + spi_set_drvdata(spi, ab4500); + + mutex_init(&ab4500->lock); + + /* read the revision register */ + revision = ab4500_read(ab4500, AB4500_MISC, AB4500_REV_REG); + + /* revision id 0x0 is for early drop, 0x10 is for cut1.0 */ + if (revision == 0x0 || revision == 0x10) + dev_info(&spi->dev, "Detected chip: %s, revision = %x\n", + ab4500_driver.driver.name, revision); + else { + dev_err(&spi->dev, "unknown chip: 0x%x\n", revision); + goto not_detect; + } + + for (i = 0; i < ARRAY_SIZE(ab4500_platform_devs); i++) { + ab4500_platform_devs[i]->dev.parent = + &spi->dev; + platform_set_drvdata(ab4500_platform_devs[i], ab4500); + } + + /* register the ab4500 platform devices */ + platform_add_devices(ab4500_platform_devs, + ARRAY_SIZE(ab4500_platform_devs)); + + return err; + + not_detect: + spi_unregister_driver(&ab4500_driver); + kfree(ab4500); + return err; +} + +static int __devexit ab4500_remove(struct spi_device *spi) +{ + struct ab4500 *ab4500 = + spi_get_drvdata(spi); + + kfree(ab4500); + + return 0; +} + +static struct spi_driver ab4500_driver = { + .driver = { + .name = "ab4500", + .owner = THIS_MODULE, + }, + .probe = ab4500_probe, + .remove = __devexit_p(ab4500_remove) +}; + +static int __devinit ab4500_init(void) +{ + return spi_register_driver(&ab4500_driver); +} + +static void __exit ab4500_exit(void) +{ + spi_unregister_driver(&ab4500_driver); +} + +subsys_initcall_sync(ab4500_init); + +MODULE_AUTHOR("Srinidhi KASAGAR + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2, as + * published by the Free Software Foundation. + * + * AB4500 device core funtions, for client access + */ +#ifndef MFD_AB4500_H +#define MFD_AB4500_H + +#include + +/* + * AB4500 bank addresses + */ +#define AB4500_SYS_CTRL1_BLOCK 0x1 +#define AB4500_SYS_CTRL2_BLOCK 0x2 +#define AB4500_REGU_CTRL1 0x3 +#define AB4500_REGU_CTRL2 0x4 +#define AB4500_USB 0x5 +#define AB4500_TVOUT 0x6 +#define AB4500_DBI 0x7 +#define AB4500_ECI_AV_ACC 0x8 +#define AB4500_RESERVED 0x9 +#define AB4500_GPADC 0xA +#define AB4500_CHARGER 0xB +#define AB4500_GAS_GAUGE 0xC +#define AB4500_AUDIO 0xD +#define AB4500_INTERRUPT 0xE +#define AB4500_RTC 0xF +#define AB4500_MISC 0x10 +#define AB4500_DEBUG 0x12 +#define AB4500_PROD_TEST 0x13 +#define AB4500_OTP_EMUL 0x15 + +/* + * System control 1 register offsets. + * Bank = 0x01 + */ +#define AB4500_TURNON_STAT_REG 0x0100 +#define AB4500_RESET_STAT_REG 0x0101 +#define AB4500_PONKEY1_PRESS_STAT_REG 0x0102 + +#define AB4500_FSM_STAT1_REG 0x0140 +#define AB4500_FSM_STAT2_REG 0x0141 +#define AB4500_SYSCLK_REQ_STAT_REG 0x0142 +#define AB4500_USB_STAT1_REG 0x0143 +#define AB4500_USB_STAT2_REG 0x0144 +#define AB4500_STATUS_SPARE1_REG 0x0145 +#define AB4500_STATUS_SPARE2_REG 0x0146 + +#define AB4500_CTRL1_REG 0x0180 +#define AB4500_CTRL2_REG 0x0181 + +/* + * System control 2 register offsets. + * bank = 0x02 + */ +#define AB4500_CTRL3_REG 0x0200 +#define AB4500_MAIN_WDOG_CTRL_REG 0x0201 +#define AB4500_MAIN_WDOG_TIMER_REG 0x0202 +#define AB4500_LOW_BAT_REG 0x0203 +#define AB4500_BATT_OK_REG 0x0204 +#define AB4500_SYSCLK_TIMER_REG 0x0205 +#define AB4500_SMPSCLK_CTRL_REG 0x0206 +#define AB4500_SMPSCLK_SEL1_REG 0x0207 +#define AB4500_SMPSCLK_SEL2_REG 0x0208 +#define AB4500_SMPSCLK_SEL3_REG 0x0209 +#define AB4500_SYSULPCLK_CONF_REG 0x020A +#define AB4500_SYSULPCLK_CTRL1_REG 0x020B +#define AB4500_SYSCLK_CTRL_REG 0x020C +#define AB4500_SYSCLK_REQ1_VALID_REG 0x020D +#define AB4500_SYSCLK_REQ_VALID_REG 0x020E +#define AB4500_SYSCTRL_SPARE_REG 0x020F +#define AB4500_PAD_CONF_REG 0x0210 + +/* + * Regu control1 register offsets + * Bank = 0x03 + */ +#define AB4500_REGU_SERIAL_CTRL1_REG 0x0300 +#define AB4500_REGU_SERIAL_CTRL2_REG 0x0301 +#define AB4500_REGU_SERIAL_CTRL3_REG 0x0302 +#define AB4500_REGU_REQ_CTRL1_REG 0x0303 +#define AB4500_REGU_REQ_CTRL2_REG 0x0304 +#define AB4500_REGU_REQ_CTRL3_REG 0x0305 +#define AB4500_REGU_REQ_CTRL4_REG 0x0306 +#define AB4500_REGU_MISC1_REG 0x0380 +#define AB4500_REGU_OTGSUPPLY_CTRL_REG 0x0381 +#define AB4500_REGU_VUSB_CTRL_REG 0x0382 +#define AB4500_REGU_VAUDIO_SUPPLY_REG 0x0383 +#define AB4500_REGU_CTRL1_SPARE_REG 0x0384 + +/* + * Regu control2 Vmod register offsets + */ +#define AB4500_REGU_VMOD_REGU_REG 0x0440 +#define AB4500_REGU_VMOD_SEL1_REG 0x0441 +#define AB4500_REGU_VMOD_SEL2_REG 0x0442 +#define AB4500_REGU_CTRL_DISCH_REG 0x0443 +#define AB4500_REGU_CTRL_DISCH2_REG 0x0444 + +/* + * USB/ULPI register offsets + * Bank : 0x5 + */ +#define AB4500_USB_LINE_STAT_REG 0x0580 +#define AB4500_USB_LINE_CTRL1_REG 0x0581 +#define AB4500_USB_LINE_CTRL2_REG 0x0582 +#define AB4500_USB_LINE_CTRL3_REG 0x0583 +#define AB4500_USB_LINE_CTRL4_REG 0x0584 +#define AB4500_USB_LINE_CTRL5_REG 0x0585 +#define AB4500_USB_OTG_CTRL_REG 0x0587 +#define AB4500_USB_OTG_STAT_REG 0x0588 +#define AB4500_USB_OTG_STAT_REG 0x0588 +#define AB4500_USB_CTRL_SPARE_REG 0x0589 +#define AB4500_USB_PHY_CTRL_REG 0x058A + +/* + * TVOUT / CTRL register offsets + * Bank : 0x06 + */ +#define AB4500_TVOUT_CTRL_REG 0x0680 + +/* + * DBI register offsets + * Bank : 0x07 + */ +#define AB4500_DBI_REG1_REG 0x0700 +#define AB4500_DBI_REG2_REG 0x0701 + +/* + * ECI regsiter offsets + * Bank : 0x08 + */ +#define AB4500_ECI_CTRL_REG 0x0800 +#define AB4500_ECI_HOOKLEVEL_REG 0x0801 +#define AB4500_ECI_DATAOUT_REG 0x0802 +#define AB4500_ECI_DATAIN_REG 0x0803 + +/* + * AV Connector register offsets + * Bank : 0x08 + */ +#define AB4500_AV_CONN_REG 0x0840 + +/* + * Accessory detection register offsets + * Bank : 0x08 + */ +#define AB4500_ACC_DET_DB1_REG 0x0880 +#define AB4500_ACC_DET_DB2_REG 0x0881 + +/* + * GPADC register offsets + * Bank : 0x0A + */ +#define AB4500_GPADC_CTRL1_REG 0x0A00 +#define AB4500_GPADC_CTRL2_REG 0x0A01 +#define AB4500_GPADC_CTRL3_REG 0x0A02 +#define AB4500_GPADC_AUTO_TIMER_REG 0x0A03 +#define AB4500_GPADC_STAT_REG 0x0A04 +#define AB4500_GPADC_MANDATAL_REG 0x0A05 +#define AB4500_GPADC_MANDATAH_REG 0x0A06 +#define AB4500_GPADC_AUTODATAL_REG 0x0A07 +#define AB4500_GPADC_AUTODATAH_REG 0x0A08 +#define AB4500_GPADC_MUX_CTRL_REG 0x0A09 + +/* + * Charger / status register offfsets + * Bank : 0x0B + */ +#define AB4500_CH_STATUS1_REG 0x0B00 +#define AB4500_CH_STATUS2_REG 0x0B01 +#define AB4500_CH_USBCH_STAT1_REG 0x0B02 +#define AB4500_CH_USBCH_STAT2_REG 0x0B03 +#define AB4500_CH_FSM_STAT_REG 0x0B04 +#define AB4500_CH_STAT_REG 0x0B05 + +/* + * Charger / control register offfsets + * Bank : 0x0B + */ +#define AB4500_CH_VOLT_LVL_REG 0x0B40 + +/* + * Charger / main control register offfsets + * Bank : 0x0B + */ +#define AB4500_MCH_CTRL1 0x0B80 +#define AB4500_MCH_CTRL2 0x0B81 +#define AB4500_MCH_IPT_CURLVL_REG 0x0B82 +#define AB4500_CH_WD_REG 0x0B83 + +/* + * Charger / USB control register offsets + * Bank : 0x0B + */ +#define AB4500_USBCH_CTRL1_REG 0x0BC0 +#define AB4500_USBCH_CTRL2_REG 0x0BC1 +#define AB4500_USBCH_IPT_CRNTLVL_REG 0x0BC2 + +/* + * RTC bank register offsets + * Bank : 0xF + */ +#define AB4500_RTC_SOFF_STAT_REG 0x0F00 +#define AB4500_RTC_CC_CONF_REG 0x0F01 +#define AB4500_RTC_READ_REQ_REG 0x0F02 +#define AB4500_RTC_WATCH_TSECMID_REG 0x0F03 +#define AB4500_RTC_WATCH_TSECHI_REG 0x0F04 +#define AB4500_RTC_WATCH_TMIN_LOW_REG 0x0F05 +#define AB4500_RTC_WATCH_TMIN_MID_REG 0x0F06 +#define AB4500_RTC_WATCH_TMIN_HI_REG 0x0F07 +#define AB4500_RTC_ALRM_MIN_LOW_REG 0x0F08 +#define AB4500_RTC_ALRM_MIN_MID_REG 0x0F09 +#define AB4500_RTC_ALRM_MIN_HI_REG 0x0F0A +#define AB4500_RTC_STAT_REG 0x0F0B +#define AB4500_RTC_BKUP_CHG_REG 0x0F0C +#define AB4500_RTC_FORCE_BKUP_REG 0x0F0D +#define AB4500_RTC_CALIB_REG 0x0F0E +#define AB4500_RTC_SWITCH_STAT_REG 0x0F0F + +/* + * PWM Out generators + * Bank: 0x10 + */ +#define AB4500_PWM_OUT_CTRL1_REG 0x1060 +#define AB4500_PWM_OUT_CTRL2_REG 0x1061 +#define AB4500_PWM_OUT_CTRL3_REG 0x1062 +#define AB4500_PWM_OUT_CTRL4_REG 0x1063 +#define AB4500_PWM_OUT_CTRL5_REG 0x1064 +#define AB4500_PWM_OUT_CTRL6_REG 0x1065 +#define AB4500_PWM_OUT_CTRL7_REG 0x1066 + +#define AB4500_I2C_PAD_CTRL_REG 0x1067 +#define AB4500_REV_REG 0x1080 + +/** + * struct ab4500 + * @spi: spi device structure + * @tx_buf: transmit buffer + * @rx_buf: receive buffer + * @lock: sync primitive + */ +struct ab4500 { + struct spi_device *spi; + unsigned long tx_buf[4]; + unsigned long rx_buf[4]; + struct mutex lock; +}; + +int ab4500_write(struct ab4500 *ab4500, unsigned char block, + unsigned long addr, unsigned char data); +int ab4500_read(struct ab4500 *ab4500, unsigned char block, + unsigned long addr); + +#endif /* MFD_AB4500_H */ -- 2.20.1