[PATCH v3 7/7] mfd: add AB4500 SPI used in U8500
srinidhi kasagar
srinidhi.kasagar at stericsson.com
Sun Oct 11 18:28:25 EDT 2009
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.
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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