Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S933353Ab3FRVOd (ORCPT ); Tue, 18 Jun 2013 17:14:33 -0400 Received: from mga02.intel.com ([134.134.136.20]:31475 "EHLO mga02.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932200Ab3FRVNe (ORCPT ); Tue, 18 Jun 2013 17:13:34 -0400 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="4.87,891,1363158000"; d="scan'208";a="331744351" From: Kevin Strasser To: linux-kernel@vger.kernel.org Cc: Kevin Strasser , Darren Hart , Samuel Ortiz , Guenter Roeck , Michael Brunner , Michael Brunner , Chris Healy , Thomas Gleixner , Dirk Hohndel , Wolfram Sang , Ben Dooks , Grant Likely , Linus Walleij , Wim Van Sebroeck , Michael Brunner Subject: [PATCH v2 1/4] mfd: Kontron PLD mfd driver Date: Tue, 18 Jun 2013 14:04:26 -0700 Message-Id: <1371589469-32700-2-git-send-email-kevin.strasser@linux.intel.com> X-Mailer: git-send-email 1.7.9.5 In-Reply-To: <1371589469-32700-1-git-send-email-kevin.strasser@linux.intel.com> References: <1365441321-21952-1-git-send-email-kevin.strasser@linux.intel.com> <1371589469-32700-1-git-send-email-kevin.strasser@linux.intel.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 25117 Lines: 858 Add core MFD driver for the on-board PLD found on some Kontron embedded modules. The PLD device may provide functions like watchdog, GPIO, UART and I2C bus. The following modules are supported: * COMe-bIP# * COMe-bPC2 (ETXexpress-PC) * COMe-bSC# (ETXexpress-SC T#) * COMe-cCT6 * COMe-cDC2 (microETXexpress-DC) * COMe-cPC2 (microETXexpress-PC) * COMe-mCT10 * ETX-OH Signed-off-by: Kevin Strasser Signed-off-by: Michael Brunner Acked-by: Guenter Roeck Acked-by: Darren Hart --- drivers/mfd/Kconfig | 21 ++ drivers/mfd/Makefile | 1 + drivers/mfd/kempld-core.c | 642 ++++++++++++++++++++++++++++++++++++++++++++ include/linux/mfd/kempld.h | 125 +++++++++ 4 files changed, 789 insertions(+) create mode 100644 drivers/mfd/kempld-core.c create mode 100644 include/linux/mfd/kempld.h diff --git a/drivers/mfd/Kconfig b/drivers/mfd/Kconfig index c346941..eea3737 100644 --- a/drivers/mfd/Kconfig +++ b/drivers/mfd/Kconfig @@ -912,6 +912,27 @@ config MFD_TIMBERDALE The timberdale FPGA can be found on the Intel Atom development board for in-vehicle infontainment, called Russellville. +config MFD_KEMPLD + tristate "Support for Kontron module PLD device" + select MFD_CORE + help + This is the core driver for the PLD (Programmable Logic Device) found + on some Kontron ETX and COMexpress (ETXexpress) modules. The PLD + device may provide functions like watchdog, GPIO, UART and I2C bus. + + The following modules are supported: + * COMe-bIP# + * COMe-bPC2 (ETXexpress-PC) + * COMe-bSC# (ETXexpress-SC T#) + * COMe-cCT6 + * COMe-cDC2 (microETXexpress-DC) + * COMe-cPC2 (microETXexpress-PC) + * COMe-mCT10 + * ETX-OH + + This driver can also be built as a module. If so, the module + will be called kempld-core. + config LPC_SCH tristate "Intel SCH LPC" depends on PCI && GENERIC_HARDIRQS diff --git a/drivers/mfd/Makefile b/drivers/mfd/Makefile index b90409c..a2f6a9f 100644 --- a/drivers/mfd/Makefile +++ b/drivers/mfd/Makefile @@ -123,6 +123,7 @@ obj-$(CONFIG_MFD_DB8500_PRCMU) += db8500-prcmu.o obj-$(CONFIG_AB8500_CORE) += ab8500-core.o ab8500-sysctrl.o obj-$(CONFIG_MFD_TIMBERDALE) += timberdale.o obj-$(CONFIG_PMIC_ADP5520) += adp5520.o +obj-$(CONFIG_MFD_KEMPLD) += kempld-core.o obj-$(CONFIG_LPC_SCH) += lpc_sch.o obj-$(CONFIG_LPC_ICH) += lpc_ich.o obj-$(CONFIG_MFD_RDC321X) += rdc321x-southbridge.o diff --git a/drivers/mfd/kempld-core.c b/drivers/mfd/kempld-core.c new file mode 100644 index 0000000..85b437e --- /dev/null +++ b/drivers/mfd/kempld-core.c @@ -0,0 +1,642 @@ +/* + * Kontron PLD MFD core driver + * + * Copyright (c) 2010-2013 Kontron Europe GmbH + * Author: Michael Brunner + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License 2 as published + * by the Free Software Foundation. + * + * 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. + */ + +#include +#include +#include +#include +#include +#include +#include + +#define MAX_ID_LEN 4 +static char force_device_id[MAX_ID_LEN + 1] = ""; +module_param_string(force_device_id, force_device_id, sizeof(force_device_id), 0); +MODULE_PARM_DESC(force_device_id, "Override detected product"); + +/* + * Get hardware mutex to block firmware from accessing the pld. + * It is possible for the firmware may hold the mutex for an extended length of + * time. This function will block until access has been granted. + */ +static void kempld_get_hardware_mutex(struct kempld_device_data *pld) +{ + /* The mutex bit will read 1 until access has been granted */ + while (ioread8(pld->io_index) & KEMPLD_MUTEX_KEY) + msleep(1); +} + +static void kempld_release_hardware_mutex(struct kempld_device_data *pld) +{ + /* The harware mutex is released when 1 is written to the mutex bit. */ + iowrite8(KEMPLD_MUTEX_KEY, pld->io_index); +} + +static int kempld_get_info_generic(struct kempld_device_data *pld) +{ + u16 version; + u8 spec; + + kempld_get_mutex(pld); + + version = kempld_read16(pld, KEMPLD_VERSION); + spec = kempld_read8(pld, KEMPLD_SPEC); + pld->info.buildnr = kempld_read16(pld, KEMPLD_BUILDNR); + + pld->info.minor = KEMPLD_VERSION_GET_MINOR(version); + pld->info.major = KEMPLD_VERSION_GET_MAJOR(version); + pld->info.number = KEMPLD_VERSION_GET_NUMBER(version); + pld->info.type = KEMPLD_VERSION_GET_TYPE(version); + + if (spec == 0xff) { + pld->info.spec_minor = 0; + pld->info.spec_major = 1; + } else { + pld->info.spec_minor = KEMPLD_SPEC_GET_MINOR(spec); + pld->info.spec_major = KEMPLD_SPEC_GET_MAJOR(spec); + } + + if (pld->info.spec_major > 0) + pld->feature_mask = kempld_read16(pld, KEMPLD_FEATURE); + else + pld->feature_mask = 0; + + kempld_release_mutex(pld); + + return 0; +} + +enum kempld_cells { + KEMPLD_I2C = 0, + KEMPLD_WDT, + KEMPLD_GPIO, + KEMPLD_UART, +}; + +static struct mfd_cell kempld_devs[] = { + [KEMPLD_I2C] = { + .name = "kempld-i2c", + }, + [KEMPLD_WDT] = { + .name = "kempld-wdt", + }, + [KEMPLD_GPIO] = { + .name = "kempld-gpio", + }, + [KEMPLD_UART] = { + .name = "kempld-uart", + }, +}; + +#define KEMPLD_MAX_DEVS ARRAY_SIZE(kempld_devs) + +static int kempld_register_cells_generic(struct kempld_device_data *pld) +{ + struct mfd_cell devs[KEMPLD_MAX_DEVS]; + int i = 0; + + if (pld->feature_mask & KEMPLD_FEATURE_BIT_I2C) + devs[i++] = kempld_devs[KEMPLD_I2C]; + + if (pld->feature_mask & KEMPLD_FEATURE_BIT_WATCHDOG) + devs[i++] = kempld_devs[KEMPLD_WDT]; + + if (pld->feature_mask & KEMPLD_FEATURE_BIT_GPIO) + devs[i++] = kempld_devs[KEMPLD_GPIO]; + + if (pld->feature_mask & KEMPLD_FEATURE_MASK_UART) + devs[i++] = kempld_devs[KEMPLD_UART]; + + return mfd_add_devices(pld->dev, -1, devs, i, NULL, 0, NULL); +} + +static struct resource kempld_ioresource = { + .start = KEMPLD_IOINDEX, + .end = KEMPLD_IODATA, + .flags = IORESOURCE_IO, +}; + +static const struct kempld_platform_data kempld_platform_data_generic = { + .pld_clock = KEMPLD_CLK, + .ioresource = &kempld_ioresource, + .get_hardware_mutex = kempld_get_hardware_mutex, + .release_hardware_mutex = kempld_release_hardware_mutex, + .get_info = kempld_get_info_generic, + .register_cells = kempld_register_cells_generic, +}; + +static struct platform_device *kempld_pdev; + +static int kempld_create_platform_device(const struct dmi_system_id *id) +{ + struct kempld_platform_data *pdata = id->driver_data; + int ret; + + kempld_pdev = platform_device_alloc("kempld", -1); + if (!kempld_pdev) + return -ENOMEM; + + ret = platform_device_add_data(kempld_pdev, pdata, sizeof(*pdata)); + if (ret) + goto err; + + ret = platform_device_add_resources(kempld_pdev, pdata->ioresource, 1); + if (ret) + goto err; + + ret = platform_device_add(kempld_pdev); + if (ret) + goto err; + + return 0; +err: + platform_device_put(kempld_pdev); + return ret; +} + +/** + * kempld_read8 - read 8 bit register + * @pld: kempld_device_data structure describing the PLD + * @index: register index on the chip + * + * kempld_get_mutex must be called prior to calling this function. + */ +u8 kempld_read8(struct kempld_device_data *pld, u8 index) +{ + iowrite8(index, pld->io_index); + return ioread8(pld->io_data); +} +EXPORT_SYMBOL_GPL(kempld_read8); + +/** + * kempld_write8 - write 8 bit register + * @pld: kempld_device_data structure describing the PLD + * @index: register index on the chip + * @data: new register value + * + * kempld_get_mutex must be called prior to calling this function. + */ +void kempld_write8(struct kempld_device_data *pld, u8 index, u8 data) +{ + iowrite8(index, pld->io_index); + iowrite8(data, pld->io_data); +} +EXPORT_SYMBOL_GPL(kempld_write8); + +/** + * kempld_read16 - read 16 bit register + * @pld: kempld_device_data structure describing the PLD + * @index: register index on the chip + * + * kempld_get_mutex must be called prior to calling this function. + */ +u16 kempld_read16(struct kempld_device_data *pld, u8 index) +{ + return kempld_read8(pld, index) | kempld_read8(pld, index + 1) << 8; +} +EXPORT_SYMBOL_GPL(kempld_read16); + +/** + * kempld_write16 - write 16 bit register + * @pld: kempld_device_data structure describing the PLD + * @index: register index on the chip + * @data: new register value + * + * kempld_get_mutex must be called prior to calling this function. + */ +void kempld_write16(struct kempld_device_data *pld, u8 index, u16 data) +{ + kempld_write8(pld, index, (u8)data); + kempld_write8(pld, index + 1, (u8)(data >> 8)); +} +EXPORT_SYMBOL_GPL(kempld_write16); + +/** + * kempld_read32 - read 32 bit register + * @pld: kempld_device_data structure describing the PLD + * @index: register index on the chip + * + * kempld_get_mutex must be called prior to calling this function. + */ +u32 kempld_read32(struct kempld_device_data *pld, u8 index) +{ + return kempld_read16(pld, index) | kempld_read16(pld, index + 2) << 16; +} +EXPORT_SYMBOL_GPL(kempld_read32); + +/** + * kempld_write32 - write 32 bit register + * @pld: kempld_device_data structure describing the PLD + * @index: register index on the chip + * @data: new register value + * + * kempld_get_mutex must be called prior to calling this function. + */ +void kempld_write32(struct kempld_device_data *pld, u8 index, u32 data) +{ + kempld_write16(pld, index, (u16)data); + kempld_write16(pld, index + 2, (u16)(data >> 16)); +} +EXPORT_SYMBOL_GPL(kempld_write32); + +/** + * kempld_get_mutex - acquire PLD mutex + * @pld: kempld_device_data structure describing the PLD + */ +void kempld_get_mutex(struct kempld_device_data *pld) +{ + struct kempld_platform_data *pdata = pld->dev->platform_data; + + mutex_lock(&pld->lock); + pdata->get_hardware_mutex(pld); +} +EXPORT_SYMBOL_GPL(kempld_get_mutex); + +/** + * kempld_release_mutex - release PLD mutex + * @pld: kempld_device_data structure describing the PLD + */ +void kempld_release_mutex(struct kempld_device_data *pld) +{ + struct kempld_platform_data *pdata = pld->dev->platform_data; + + pdata->release_hardware_mutex(pld); + mutex_unlock(&pld->lock); +} +EXPORT_SYMBOL_GPL(kempld_release_mutex); + +/** + * kempld_get_info - update device specific information + * @pld: kempld_device_data structure describing the PLD + * + * This function calls the configured board specific kempld_get_info_XXXX + * function which is responsible for gathering information about the specific + * hardware. The information is then stored within the pld structure. + */ +static int kempld_get_info(struct kempld_device_data *pld) +{ + struct kempld_platform_data *pdata = pld->dev->platform_data; + + return pdata->get_info(pld); +} + +/* + * kempld_register_cells - register cell drivers + * + * This function registers cell drivers for the detected hardware by calling + * the configured kempld_register_cells_XXXX function which is responsible + * to detect and register the needed cell drivers. + */ +static int kempld_register_cells(struct kempld_device_data *pld) +{ + struct kempld_platform_data *pdata = pld->dev->platform_data; + + return pdata->register_cells(pld); +} + +static int kempld_detect_device(struct kempld_device_data *pld) +{ + struct kempld_platform_data *pdata = pld->dev->platform_data; + char *version_type; + u8 index_reg; + int ret; + + mutex_lock(&pld->lock); + + /* Check for empty IO space */ + index_reg = ioread8(pld->io_index); + if (index_reg == 0xff && ioread8(pld->io_data) == 0xff) { + mutex_unlock(&pld->lock); + return -ENODEV; + } + + /* Release hardware mutex if aquired */ + if (!(index_reg & KEMPLD_MUTEX_KEY)) + iowrite8(KEMPLD_MUTEX_KEY, pld->io_index); + + mutex_unlock(&pld->lock); + + ret = kempld_get_info(pld); + if (ret) + return ret; + + switch (pld->info.type) { + case 0: + version_type = "release"; + break; + case 1: + version_type = "debug"; + break; + case 2: + version_type = "custom"; + break; + default: + version_type = "unspecified"; + } + + dev_info(pld->dev, "Found Kontron PLD %d\n", pld->info.number); + dev_info(pld->dev, "%s version %d.%d build %d, specification %d.%d\n", + version_type, pld->info.major, pld->info.minor, + pld->info.buildnr, pld->info.spec_major, + pld->info.spec_minor); + + return kempld_register_cells(pld); +} + +static int kempld_probe(struct platform_device *pdev) +{ + struct kempld_platform_data *pdata = pdev->dev.platform_data; + struct device *dev = &pdev->dev; + struct kempld_device_data *pld; + struct resource *ioport; + int ret; + + pld = devm_kzalloc(dev, sizeof(*pld), GFP_KERNEL); + if (!pld) + return -ENOMEM; + + ioport = platform_get_resource(pdev, IORESOURCE_IO, 0); + if (!ioport) + return -EINVAL; + + pld->io_base = devm_ioport_map(dev, ioport->start, + ioport->end - ioport->start); + if (!pld->io_base) + return -ENOMEM; + + pld->io_index = pld->io_base; + pld->io_data = pld->io_base + 1; + pld->pld_clock = pdata->pld_clock; + pld->dev = dev; + + mutex_init(&pld->lock); + platform_set_drvdata(pdev, pld); + + ret = kempld_detect_device(pld); + if (ret) + return ret; + + return 0; +} + +static int kempld_remove(struct platform_device *pdev) +{ + struct kempld_device_data *pld = platform_get_drvdata(pdev); + struct kempld_platform_data *pdata = pld->dev->platform_data; + + mfd_remove_devices(&pdev->dev); + pdata->release_hardware_mutex(pld); + + return 0; +} + +static struct platform_driver kempld_driver = { + .driver = { + .name = "kempld", + .owner = THIS_MODULE, + }, + .probe = kempld_probe, + .remove = kempld_remove, +}; + +static struct dmi_system_id __initdata kempld_dmi_table[] = { + { + .ident = "CCR2", + .matches = { + DMI_MATCH(DMI_BOARD_VENDOR, "Kontron"), + DMI_MATCH(DMI_BOARD_NAME, "COMe-bIP2"), + }, + .driver_data = (void *)&kempld_platform_data_generic, + .callback = kempld_create_platform_device, + }, { + .ident = "CCR6", + .matches = { + DMI_MATCH(DMI_BOARD_VENDOR, "Kontron"), + DMI_MATCH(DMI_BOARD_NAME, "COMe-bIP6"), + }, + .driver_data = (void *)&kempld_platform_data_generic, + .callback = kempld_create_platform_device, + }, { + .ident = "CHR2", + .matches = { + DMI_MATCH(DMI_BOARD_VENDOR, "Kontron"), + DMI_MATCH(DMI_BOARD_NAME, "ETXexpress-SC T2"), + }, + .driver_data = (void *)&kempld_platform_data_generic, + .callback = kempld_create_platform_device, + }, { + .ident = "CHR2", + .matches = { + DMI_MATCH(DMI_BOARD_VENDOR, "Kontron"), + DMI_MATCH(DMI_BOARD_NAME, "ETXe-SC T2"), + }, + .driver_data = (void *)&kempld_platform_data_generic, + .callback = kempld_create_platform_device, + }, { + .ident = "CHR2", + .matches = { + DMI_MATCH(DMI_BOARD_VENDOR, "Kontron"), + DMI_MATCH(DMI_BOARD_NAME, "COMe-bSC2"), + }, + .driver_data = (void *)&kempld_platform_data_generic, + .callback = kempld_create_platform_device, + }, { + .ident = "CHR6", + .matches = { + DMI_MATCH(DMI_BOARD_VENDOR, "Kontron"), + DMI_MATCH(DMI_BOARD_NAME, "ETXexpress-SC T6"), + }, + .driver_data = (void *)&kempld_platform_data_generic, + .callback = kempld_create_platform_device, + }, { + .ident = "CHR6", + .matches = { + DMI_MATCH(DMI_BOARD_VENDOR, "Kontron"), + DMI_MATCH(DMI_BOARD_NAME, "ETXe-SC T6"), + }, + .driver_data = (void *)&kempld_platform_data_generic, + .callback = kempld_create_platform_device, + }, { + .ident = "CHR6", + .matches = { + DMI_MATCH(DMI_BOARD_VENDOR, "Kontron"), + DMI_MATCH(DMI_BOARD_NAME, "COMe-bSC6"), + }, + .driver_data = (void *)&kempld_platform_data_generic, + .callback = kempld_create_platform_device, + }, { + .ident = "CNTG", + .matches = { + DMI_MATCH(DMI_BOARD_VENDOR, "Kontron"), + DMI_MATCH(DMI_BOARD_NAME, "ETXexpress-PC"), + }, + .driver_data = (void *)&kempld_platform_data_generic, + .callback = kempld_create_platform_device, + }, { + .ident = "CNTG", + .matches = { + DMI_MATCH(DMI_BOARD_VENDOR, "Kontron"), + DMI_MATCH(DMI_BOARD_NAME, "COMe-bPC2"), + }, + .driver_data = (void *)&kempld_platform_data_generic, + .callback = kempld_create_platform_device, + }, { + .ident = "CNTX", + .matches = { + DMI_MATCH(DMI_BOARD_VENDOR, "Kontron"), + DMI_MATCH(DMI_BOARD_NAME, "PXT"), + }, + .driver_data = (void *)&kempld_platform_data_generic, + .callback = kempld_create_platform_device, + }, { + .ident = "FRI2", + .matches = { + DMI_MATCH(DMI_BOARD_VENDOR, "Kontron"), + DMI_MATCH(DMI_BIOS_VERSION, "FRI2"), + }, + .driver_data = (void *)&kempld_platform_data_generic, + .callback = kempld_create_platform_device, + }, { + .ident = "FRI2", + .matches = { + DMI_MATCH(DMI_PRODUCT_NAME, "Fish River Island II"), + }, + .driver_data = (void *)&kempld_platform_data_generic, + .callback = kempld_create_platform_device, + }, { + .ident = "MBR1", + .matches = { + DMI_MATCH(DMI_BOARD_VENDOR, "Kontron"), + DMI_MATCH(DMI_BOARD_NAME, "ETX-OH"), + }, + .driver_data = (void *)&kempld_platform_data_generic, + .callback = kempld_create_platform_device, + }, { + .ident = "NTC1", + .matches = { + DMI_MATCH(DMI_BOARD_VENDOR, "Kontron"), + DMI_MATCH(DMI_BOARD_NAME, "nanoETXexpress-TT"), + }, + .driver_data = (void *)&kempld_platform_data_generic, + .callback = kempld_create_platform_device, + }, { + .ident = "NTC1", + .matches = { + DMI_MATCH(DMI_BOARD_VENDOR, "Kontron"), + DMI_MATCH(DMI_BOARD_NAME, "nETXe-TT"), + }, + .driver_data = (void *)&kempld_platform_data_generic, + .callback = kempld_create_platform_device, + }, { + .ident = "NTC1", + .matches = { + DMI_MATCH(DMI_BOARD_VENDOR, "Kontron"), + DMI_MATCH(DMI_BOARD_NAME, "COMe-mTT"), + }, + .driver_data = (void *)&kempld_platform_data_generic, + .callback = kempld_create_platform_device, + }, { + .ident = "NUP1", + .matches = { + DMI_MATCH(DMI_BOARD_VENDOR, "Kontron"), + DMI_MATCH(DMI_BOARD_NAME, "COMe-mCT"), + }, + .driver_data = (void *)&kempld_platform_data_generic, + .callback = kempld_create_platform_device, + }, { + .ident = "UNP1", + .matches = { + DMI_MATCH(DMI_BOARD_VENDOR, "Kontron"), + DMI_MATCH(DMI_BOARD_NAME, "microETXexpress-DC"), + }, + .driver_data = (void *)&kempld_platform_data_generic, + .callback = kempld_create_platform_device, + }, { + .ident = "UNP1", + .matches = { + DMI_MATCH(DMI_BOARD_VENDOR, "Kontron"), + DMI_MATCH(DMI_BOARD_NAME, "COMe-cDC2"), + }, + .driver_data = (void *)&kempld_platform_data_generic, + .callback = kempld_create_platform_device, + }, { + .ident = "UNTG", + .matches = { + DMI_MATCH(DMI_BOARD_VENDOR, "Kontron"), + DMI_MATCH(DMI_BOARD_NAME, "microETXexpress-PC"), + }, + .driver_data = (void *)&kempld_platform_data_generic, + .callback = kempld_create_platform_device, + }, { + .ident = "UNTG", + .matches = { + DMI_MATCH(DMI_BOARD_VENDOR, "Kontron"), + DMI_MATCH(DMI_BOARD_NAME, "COMe-cPC2"), + }, + .driver_data = (void *)&kempld_platform_data_generic, + .callback = kempld_create_platform_device, + }, { + .ident = "UUP6", + .matches = { + DMI_MATCH(DMI_BOARD_VENDOR, "Kontron"), + DMI_MATCH(DMI_BOARD_NAME, "COMe-cCT6"), + }, + .driver_data = (void *)&kempld_platform_data_generic, + .callback = kempld_create_platform_device, + }, + {} +}; +MODULE_DEVICE_TABLE(dmi, kempld_dmi_table); + +static int __init kempld_init(void) +{ + const struct dmi_system_id *id; + int ret; + + if (force_device_id[0]) { + for (id = kempld_dmi_table; id->matches[0].slot != DMI_NONE; id++) + if (strstr(id->ident, force_device_id)) + if (id->callback && id->callback(id)) + break; + if (id->matches[0].slot == DMI_NONE) + return -ENODEV; + } else { + if (!dmi_check_system(kempld_dmi_table)) + return -ENODEV; + } + + ret = platform_driver_register(&kempld_driver); + if (ret) + return ret; + + return 0; +} + +static void __exit kempld_exit(void) +{ + if (kempld_pdev) + platform_device_unregister(kempld_pdev); + + platform_driver_unregister(&kempld_driver); +} + +module_init(kempld_init); +module_exit(kempld_exit); + +MODULE_DESCRIPTION("KEM PLD Core Driver"); +MODULE_AUTHOR("Michael Brunner "); +MODULE_LICENSE("GPL"); +MODULE_ALIAS("platform:kempld-core"); diff --git a/include/linux/mfd/kempld.h b/include/linux/mfd/kempld.h new file mode 100644 index 0000000..b911ef3 --- /dev/null +++ b/include/linux/mfd/kempld.h @@ -0,0 +1,125 @@ +/* + * Kontron PLD driver definitions + * + * Copyright (c) 2010-2012 Kontron Europe GmbH + * Author: Michael Brunner + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License 2 as published + * by the Free Software Foundation. + */ + +#ifndef _LINUX_MFD_KEMPLD_H_ +#define _LINUX_MFD_KEMPLD_H_ + +/* kempld register definitions */ +#define KEMPLD_IOINDEX 0xa80 +#define KEMPLD_IODATA 0xa81 +#define KEMPLD_MUTEX_KEY 0x80 +#define KEMPLD_VERSION 0x00 +#define KEMPLD_VERSION_LSB 0x00 +#define KEMPLD_VERSION_MSB 0x01 +#define KEMPLD_VERSION_GET_MINOR(x) (x & 0x1f) +#define KEMPLD_VERSION_GET_MAJOR(x) ((x >> 5) & 0x1f) +#define KEMPLD_VERSION_GET_NUMBER(x) ((x >> 10) & 0xf) +#define KEMPLD_VERSION_GET_TYPE(x) ((x >> 14) & 0x3) +#define KEMPLD_BUILDNR 0x02 +#define KEMPLD_BUILDNR_LSB 0x02 +#define KEMPLD_BUILDNR_MSB 0x03 +#define KEMPLD_FEATURE 0x04 +#define KEMPLD_FEATURE_LSB 0x04 +#define KEMPLD_FEATURE_MSB 0x05 +#define KEMPLD_FEATURE_BIT_I2C (1 << 0) +#define KEMPLD_FEATURE_BIT_WATCHDOG (1 << 1) +#define KEMPLD_FEATURE_BIT_GPIO (1 << 2) +#define KEMPLD_FEATURE_MASK_UART (7 << 3) +#define KEMPLD_FEATURE_BIT_NMI (1 << 8) +#define KEMPLD_FEATURE_BIT_SMI (1 << 9) +#define KEMPLD_FEATURE_BIT_SCI (1 << 10) +#define KEMPLD_SPEC 0x06 +#define KEMPLD_SPEC_GET_MINOR(x) (x & 0x0f) +#define KEMPLD_SPEC_GET_MAJOR(x) ((x >> 4) & 0x0f) +#define KEMPLD_IRQ_GPIO 0x35 +#define KEMPLD_IRQ_I2C 0x36 +#define KEMPLD_CFG 0x37 +#define KEMPLD_CFG_GPIO_I2C_MUX (1 << 0) +#define KEMPLD_CFG_BIOS_WP (1 << 7) + +#define KEMPLD_CLK 33333333 + +#define KEMPLD_TYPE_RELEASE 0x0 +#define KEMPLD_TYPE_DEBUG 0x1 +#define KEMPLD_TYPE_CUSTOM 0x2 + +/** + * struct kempld_info - PLD device information structure + * @major: PLD major revision + * @minor: PLD minor revision + * @buildnr: PLD build number + * @number: PLD board specific index + * @type: PLD type + * @spec_major: PLD FW specification major revision + * @spec_minor: PLD FW specification minor revision + */ +struct kempld_info { + unsigned int major; + unsigned int minor; + unsigned int buildnr; + unsigned int number; + unsigned int type; + unsigned int spec_major; + unsigned int spec_minor; +}; + +/** + * struct kempld_device_data - Internal representation of the PLD device + * @io_base: Pointer to the IO memory + * @io_index: Pointer to the IO index register + * @io_data: Pointer to the IO data register + * @pld_clock: PLD clock frequency + * @feature_mask: PLD feature mask + * @dev: Pointer to kernel device structure + * @info: KEMPLD info structure + * @lock: PLD mutex + */ +struct kempld_device_data { + void __iomem *io_base; + void __iomem *io_index; + void __iomem *io_data; + u32 pld_clock; + u32 feature_mask; + struct device *dev; + struct kempld_info info; + struct mutex lock; +}; + +/** + * struct kempld_platform_data - PLD hardware configuration structure + * @pld_clock: PLD clock frequency + * @gpio_base GPIO base pin number + * @ioresource: IO addresses of the PLD + * @get_mutex: PLD specific get_mutex callback + * @release_mutex: PLD specific release_mutex callback + * @get_info: PLD specific get_info callback + * @register_cells: PLD specific register_cells callback + */ +struct kempld_platform_data { + u32 pld_clock; + int gpio_base; + struct resource *ioresource; + void (*get_hardware_mutex) (struct kempld_device_data *); + void (*release_hardware_mutex) (struct kempld_device_data *); + int (*get_info) (struct kempld_device_data *); + int (*register_cells) (struct kempld_device_data *); +}; + +extern void kempld_get_mutex(struct kempld_device_data *pld); +extern void kempld_release_mutex(struct kempld_device_data *pld); +extern u8 kempld_read8(struct kempld_device_data *pld, u8 index); +extern void kempld_write8(struct kempld_device_data *pld, u8 index, u8 data); +extern u16 kempld_read16(struct kempld_device_data *pld, u8 index); +extern void kempld_write16(struct kempld_device_data *pld, u8 index, u16 data); +extern u32 kempld_read32(struct kempld_device_data *pld, u8 index); +extern void kempld_write32(struct kempld_device_data *pld, u8 index, u32 data); + +#endif /* _LINUX_MFD_KEMPLD_H_ */ -- 1.7.9.5 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at 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