[PATCH v3 7/7] mfd: add AB4500 SPI used in U8500
Samuel Ortiz
sameo at linux.intel.com
Mon Oct 12 12:33:22 EDT 2009
Hi Srinidhi,
On Mon, Oct 12, 2009 at 03:58:25AM +0530, srinidhi kasagar wrote:
> From: srinidhi kasagar <srinidhi.kasagar at stericsson.com>
>
> 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.
>
> The chip is now called as AB4500, whereas in the older version
> it was called as STW4500. This just renames stw4500 as ab4500.
Path applied to my for-next branch, thanks.
I had to apply a build fix for this driver as it wouldnt build as a module.
See:
http://git.kernel.org/?p=linux/kernel/git/sameo/mfd-2.6.git;a=commit;h=2c7ddb89e5fb17723198cf7e67c80a324d1d9784
Cheers,
Samuel.
> Signed-off-by: srinidhi kasagar <srinidhi.kasagar at stericsson.com>
> Acked-by: Andrea Gallo <andrea.gallo at stericsson.com>
> Reviewed-by: Mark Brown <broonie at sirena.org.uk>
> Reviewed-by: Jean-Christophe <plagnioj at jcrosoft.com>
> ---
> 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(+), 0 deletions(-)
> create mode 100755 drivers/mfd/ab4500-core.c
> create mode 100644 include/linux/mfd/ab4500.h
>
> diff --git a/drivers/mfd/Kconfig b/drivers/mfd/Kconfig
> index 570be13..4b2c97d 100644
> --- a/drivers/mfd/Kconfig
> +++ b/drivers/mfd/Kconfig
> @@ -305,6 +305,16 @@ config EZX_PCAP
> This enables the PCAP ASIC present on EZX Phones. This is
> needed for MMC, TouchScreen, Sound, USB, etc..
>
> +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 f3b277b..0d98968 100644
> --- a/drivers/mfd/Makefile
> +++ b/drivers/mfd/Makefile
> @@ -50,3 +50,4 @@ 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
> diff --git a/drivers/mfd/ab4500-core.c b/drivers/mfd/ab4500-core.c
> new file mode 100755
> index 0000000..3ad91f7
> --- /dev/null
> +++ b/drivers/mfd/ab4500-core.c
> @@ -0,0 +1,207 @@
> +/*
> + * Copyright (C) 2009 ST-Ericsson
> + *
> + * Author: Srinidhi KASAGAR <srinidhi.kasagar at stericsson.com>
> + *
> + * 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 <linux/kernel.h>
> +#include <linux/init.h>
> +#include <linux/module.h>
> +#include <linux/platform_device.h>
> +#include <linux/spi/spi.h>
> +#include <linux/mfd/ab4500.h>
> +
> +/* 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 <srinidhi.kasagar at stericsson.com");
> +MODULE_DESCRIPTION("AB4500 core driver");
> +MODULE_LICENSE("GPL");
> diff --git a/include/linux/mfd/ab4500.h b/include/linux/mfd/ab4500.h
> new file mode 100644
> index 0000000..a42a703
> --- /dev/null
> +++ b/include/linux/mfd/ab4500.h
> @@ -0,0 +1,262 @@
> +/*
> + * Copyright (C) 2009 ST-Ericsson
> + *
> + * Author: Srinidhi KASAGAR <srinidhi.kasagar at stericsson.com>
> + *
> + * 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 <linux/device.h>
> +
> +/*
> + * 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 */
> --
> 1.6.3.GIT
>
>
>
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