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Message-Id: <6.2.5.6.2.20120220191616.0273c360@roeck-us.net>
Date: Mon, 20 Feb 2012 19:17:52 -0800
From: Guenter Roeck <guenter@...ck-us.net>
To: Aaron Sierra <asierra@...-inc.com>,
Jean Delvare <khali@...ux-fr.org>
Cc: Peter Tyser <ptyser@...-inc.com>,
Grant Likely <grant.likely@...retlab.ca>,
LKML <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH V5 1/3] mfd: Add LPC driver for Intel ICH chipsets
At 05:10 PM 2/20/2012, Aaron Sierra wrote:
>This driver currently creates resources for use by a forthcoming ICH
>chipset GPIO driver. It could be expanded to create the resources for
>converting the esb2rom (mtd) and iTCO_wdt (wdt), and potentially more,
>drivers to use the mfd model.
>
>Signed-off-by: Aaron Sierra <asierra@...-inc.com>
>Signed-off-by: Guenter Roeck <linux@...ck-us.net>
>---
> drivers/mfd/Kconfig | 9 +
> drivers/mfd/Makefile | 1 +
> drivers/mfd/lpc_ich.c | 717
> +++++++++++++++++++++++++++++++++++++++++++
> include/linux/mfd/lpc_ich.h | 41 +++
> 4 files changed, 768 insertions(+), 0 deletions(-)
> create mode 100644 drivers/mfd/lpc_ich.c
> create mode 100644 include/linux/mfd/lpc_ich.h
>
>diff --git a/drivers/mfd/Kconfig b/drivers/mfd/Kconfig
>index cd13e9f..f581e59 100644
>--- a/drivers/mfd/Kconfig
>+++ b/drivers/mfd/Kconfig
>@@ -724,6 +724,15 @@ config LPC_SCH
> LPC bridge function of the Intel SCH provides support for
> System Management Bus and General Purpose I/O.
>
>+config LPC_ICH
>+ tristate "Intel ICH LPC"
>+ depends on PCI
>+ select MFD_CORE
>+ help
>+ The LPC bridge function of the Intel ICH provides support for
>+ many functional units. This driver provides needed support for
>+ other drivers to control these functions, currently GPIO.
>+
> config MFD_RDC321X
> tristate "Support for RDC-R321x southbridge"
> select MFD_CORE
>diff --git a/drivers/mfd/Makefile b/drivers/mfd/Makefile
>index b953bab..6636c5a 100644
>--- a/drivers/mfd/Makefile
>+++ b/drivers/mfd/Makefile
>@@ -98,6 +98,7 @@ obj-$(CONFIG_MFD_DB5500_PRCMU) += db5500-prcmu.o
> obj-$(CONFIG_MFD_TIMBERDALE) += timberdale.o
> obj-$(CONFIG_PMIC_ADP5520) += adp5520.o
> obj-$(CONFIG_LPC_SCH) += lpc_sch.o
>+obj-$(CONFIG_LPC_ICH) += lpc_ich.o
> obj-$(CONFIG_MFD_RDC321X) += rdc321x-southbridge.o
> obj-$(CONFIG_MFD_JANZ_CMODIO) += janz-cmodio.o
> obj-$(CONFIG_MFD_JZ4740_ADC) += jz4740-adc.o
>diff --git a/drivers/mfd/lpc_ich.c b/drivers/mfd/lpc_ich.c
>new file mode 100644
>index 0000000..dcc375c
>--- /dev/null
>+++ b/drivers/mfd/lpc_ich.c
>@@ -0,0 +1,717 @@
>+/*
>+ * lpc_ich.c - LPC interface for Intel ICH
>+ *
>+ * LPC bridge function of the Intel ICH contains many other
>+ * functional units, such as Interrupt controllers, Timers,
>+ * Power Management, System Management, GPIO, RTC, and LPC
>+ * Configuration Registers.
>+ *
>+ * This driver is derived from lpc_sch.
>+
>+ * Copyright (c) 2011 Extreme Engineering Solution, Inc.
>+ * Author: Aaron Sierra <asierra@...-inc.com>
>+ *
>+ * 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.
>+ *
>+ * You should have received a copy of the GNU General Public License
>+ * along with this program; see the file COPYING. If not, write to
>+ * the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
>+ *
>+ * This driver supports the following I/O Controller hubs:
>+ * (See the intel documentation on http://developer.intel.com.)
>+ * document number 290655-003, 290677-014: 82801AA (ICH), 82801AB (ICHO)
>+ * document number 290687-002, 298242-027: 82801BA (ICH2)
>+ * document number 290733-003, 290739-013: 82801CA (ICH3-S)
>+ * document number 290716-001, 290718-007: 82801CAM (ICH3-M)
>+ * document number 290744-001, 290745-025: 82801DB (ICH4)
>+ * document number 252337-001, 252663-008: 82801DBM (ICH4-M)
>+ * document number 273599-001, 273645-002: 82801E (C-ICH)
>+ * document number 252516-001, 252517-028: 82801EB (ICH5),
>82801ER (ICH5R)
>+ * document number 300641-004, 300884-013: 6300ESB
>+ * document number 301473-002, 301474-026: 82801F (ICH6)
>+ * document number 313082-001, 313075-006: 631xESB, 632xESB
>+ * document number 307013-003, 307014-024: 82801G (ICH7)
>+ * document number 322896-001, 322897-001: NM10
>+ * document number 313056-003, 313057-017: 82801H (ICH8)
>+ * document number 316972-004, 316973-012: 82801I (ICH9)
>+ * document number 319973-002, 319974-002: 82801J (ICH10)
>+ * document number 322169-001, 322170-003: 5 Series, 3400 Series (PCH)
>+ * document number 320066-003, 320257-008: EP80597 (IICH)
>+ * document number 324645-001, 324646-001: Cougar Point (CPT)
>+ * document number TBD : Patsburg (PBG)
>+ * document number TBD : DH89xxCC
>+ * document number TBD : Panther Point
>+ * document number TBD : Lynx Point
>+ */
>+
>+#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
>+
>+#include <linux/init.h>
>+#include <linux/kernel.h>
>+#include <linux/module.h>
>+#include <linux/errno.h>
>+#include <linux/acpi.h>
>+#include <linux/pci.h>
>+#include <linux/mfd/core.h>
>+#include <linux/mfd/lpc_ich.h>
>+
>+#define ACPIBASE 0x40
>+#define ACPIBASE_GPE_OFF 0x28
>+#define ACPIBASE_GPE_END 0x2f
>+#define ACPICTRL 0x44
>+
>+#define GPIOBASE 0x48
>+#define GPIOCTRL 0x4C
>+
>+static int lpc_ich_acpi_save = -1;
>+static int lpc_ich_gpio_save = -1;
>+
>+static struct resource gpio_ich_res[] = {
>+ /* GPIO */
>+ {
>+ .flags = IORESOURCE_IO,
>+ },
>+ /* ACPI - GPE0 */
>+ {
>+ .flags = IORESOURCE_IO,
>+ },
>+};
>+
>+enum lpc_cells {
>+ LPC_GPIO = 0,
>+};
>+
>+static struct mfd_cell lpc_ich_cells[] = {
>+ [LPC_GPIO] = {
>+ .name = "gpio_ich",
>+ .num_resources = ARRAY_SIZE(gpio_ich_res),
>+ .resources = gpio_ich_res,
>+ .ignore_resource_conflicts = true,
>+ },
>+};
>+
>+/* chipset related info */
>+enum lpc_chipsets {
>+ LPC_ICH = 0, /* ICH */
>+ LPC_ICH0, /* ICH0 */
>+ LPC_ICH2, /* ICH2 */
>+ LPC_ICH2M, /* ICH2-M */
>+ LPC_ICH3, /* ICH3-S */
>+ LPC_ICH3M, /* ICH3-M */
>+ LPC_ICH4, /* ICH4 */
>+ LPC_ICH4M, /* ICH4-M */
>+ LPC_CICH, /* C-ICH */
>+ LPC_ICH5, /* ICH5 & ICH5R */
>+ LPC_6300ESB, /* 6300ESB */
>+ LPC_ICH6, /* ICH6 & ICH6R */
>+ LPC_ICH6M, /* ICH6-M */
>+ LPC_ICH6W, /* ICH6W & ICH6RW */
>+ LPC_631XESB, /* 631xESB/632xESB */
>+ LPC_ICH7, /* ICH7 & ICH7R */
>+ LPC_ICH7DH, /* ICH7DH */
>+ LPC_ICH7M, /* ICH7-M & ICH7-U */
>+ LPC_ICH7MDH, /* ICH7-M DH */
>+ LPC_NM10, /* NM10 */
>+ LPC_ICH8, /* ICH8 & ICH8R */
>+ LPC_ICH8DH, /* ICH8DH */
>+ LPC_ICH8DO, /* ICH8DO */
>+ LPC_ICH8M, /* ICH8M */
>+ LPC_ICH8ME, /* ICH8M-E */
>+ LPC_ICH9, /* ICH9 */
>+ LPC_ICH9R, /* ICH9R */
>+ LPC_ICH9DH, /* ICH9DH */
>+ LPC_ICH9DO, /* ICH9DO */
>+ LPC_ICH9M, /* ICH9M */
>+ LPC_ICH9ME, /* ICH9M-E */
>+ LPC_ICH10, /* ICH10 */
>+ LPC_ICH10R, /* ICH10R */
>+ LPC_ICH10D, /* ICH10D */
>+ LPC_ICH10DO, /* ICH10DO */
>+ LPC_PCH, /* PCH Desktop Full Featured */
>+ LPC_PCHM, /* PCH Mobile Full Featured */
>+ LPC_P55, /* P55 */
>+ LPC_PM55, /* PM55 */
>+ LPC_H55, /* H55 */
>+ LPC_QM57, /* QM57 */
>+ LPC_H57, /* H57 */
>+ LPC_HM55, /* HM55 */
>+ LPC_Q57, /* Q57 */
>+ LPC_HM57, /* HM57 */
>+ LPC_PCHMSFF, /* PCH Mobile SFF Full Featured */
>+ LPC_QS57, /* QS57 */
>+ LPC_3400, /* 3400 */
>+ LPC_3420, /* 3420 */
>+ LPC_3450, /* 3450 */
>+ LPC_EP80579, /* EP80579 */
>+ LPC_CPT, /* Cougar Point */
>+ LPC_CPTD, /* Cougar Point Desktop */
>+ LPC_CPTM, /* Cougar Point Mobile */
>+ LPC_PBG, /* Patsburg */
>+ LPC_DH89XXCC, /* DH89xxCC */
>+ LPC_PPT, /* Panther Point */
>+ LPC_LPT, /* Lynx Point */
>+};
>+
>+struct lpc_ich_info lpc_chipset_info[] __devinitdata = {
>+ [LPC_ICH] = {
>+ .name = "ICH",
>+ },
>+ [LPC_ICH0] = {
>+ .name = "ICH0",
>+ },
>+ [LPC_ICH2] = {
>+ .name = "ICH2",
>+ },
>+ [LPC_ICH2M] = {
>+ .name = "ICH2-M",
>+ },
>+ [LPC_ICH3] = {
>+ .name = "ICH3-S",
>+ },
>+ [LPC_ICH3M] = {
>+ .name = "ICH3-M",
>+ },
>+ [LPC_ICH4] = {
>+ .name = "ICH4",
>+ },
>+ [LPC_ICH4M] = {
>+ .name = "ICH4-M",
>+ },
>+ [LPC_CICH] = {
>+ .name = "C-ICH",
>+ },
>+ [LPC_ICH5] = {
>+ .name = "ICH5 or ICH5R",
>+ },
>+ [LPC_6300ESB] = {
>+ .name = "6300ESB",
>+ },
>+ [LPC_ICH6] = {
>+ .name = "ICH6 or ICH6R",
>+ .gpio_version = ICH_V6_GPIO,
>+ },
>+ [LPC_ICH6M] = {
>+ .name = "ICH6-M",
>+ .gpio_version = ICH_V6_GPIO,
>+ },
>+ [LPC_ICH6W] = {
>+ .name = "ICH6W or ICH6RW",
>+ .gpio_version = ICH_V6_GPIO,
>+ },
>+ [LPC_631XESB] = {
>+ .name = "631xESB/632xESB",
>+ .gpio_version = ICH_V6_GPIO,
>+ },
>+ [LPC_ICH7] = {
>+ .name = "ICH7 or ICH7R",
>+ .gpio_version = ICH_V7_GPIO,
>+ },
>+ [LPC_ICH7DH] = {
>+ .name = "ICH7DH",
>+ .gpio_version = ICH_V7_GPIO,
>+ },
>+ [LPC_ICH7M] = {
>+ .name = "ICH7-M or ICH7-U",
>+ .gpio_version = ICH_V7_GPIO,
>+ },
>+ [LPC_ICH7MDH] = {
>+ .name = "ICH7-M DH",
>+ .gpio_version = ICH_V7_GPIO,
>+ },
>+ [LPC_NM10] = {
>+ .name = "NM10",
>+ },
>+ [LPC_ICH8] = {
>+ .name = "ICH8 or ICH8R",
>+ .gpio_version = ICH_V7_GPIO,
>+ },
>+ [LPC_ICH8DH] = {
>+ .name = "ICH8DH",
>+ .gpio_version = ICH_V7_GPIO,
>+ },
>+ [LPC_ICH8DO] = {
>+ .name = "ICH8DO",
>+ .gpio_version = ICH_V7_GPIO,
>+ },
>+ [LPC_ICH8M] = {
>+ .name = "ICH8M",
>+ .gpio_version = ICH_V7_GPIO,
>+ },
>+ [LPC_ICH8ME] = {
>+ .name = "ICH8M-E",
>+ .gpio_version = ICH_V7_GPIO,
>+ },
>+ [LPC_ICH9] = {
>+ .name = "ICH9",
>+ .gpio_version = ICH_V9_GPIO,
>+ },
>+ [LPC_ICH9R] = {
>+ .name = "ICH9R",
>+ .gpio_version = ICH_V9_GPIO,
>+ },
>+ [LPC_ICH9DH] = {
>+ .name = "ICH9DH",
>+ .gpio_version = ICH_V9_GPIO,
>+ },
>+ [LPC_ICH9DO] = {
>+ .name = "ICH9DO",
>+ .gpio_version = ICH_V9_GPIO,
>+ },
>+ [LPC_ICH9M] = {
>+ .name = "ICH9M",
>+ .gpio_version = ICH_V9_GPIO,
>+ },
>+ [LPC_ICH9ME] = {
>+ .name = "ICH9M-E",
>+ .gpio_version = ICH_V9_GPIO,
>+ },
>+ [LPC_ICH10] = {
>+ .name = "ICH10",
>+ .gpio_version = ICH_V10CONS_GPIO,
>+ },
>+ [LPC_ICH10R] = {
>+ .name = "ICH10R",
>+ .gpio_version = ICH_V10CONS_GPIO,
>+ },
>+ [LPC_ICH10D] = {
>+ .name = "ICH10D",
>+ .gpio_version = ICH_V10CORP_GPIO,
>+ },
>+ [LPC_ICH10DO] = {
>+ .name = "ICH10DO",
>+ .gpio_version = ICH_V10CORP_GPIO,
>+ },
>+ [LPC_PCH] = {
>+ .name = "PCH Desktop Full Featured",
>+ .gpio_version = ICH_V5_GPIO,
>+ },
>+ [LPC_PCHM] = {
>+ .name = "PCH Mobile Full Featured",
>+ .gpio_version = ICH_V5_GPIO,
>+ },
>+ [LPC_P55] = {
>+ .name = "P55",
>+ .gpio_version = ICH_V5_GPIO,
>+ },
>+ [LPC_PM55] = {
>+ .name = "PM55",
>+ .gpio_version = ICH_V5_GPIO,
>+ },
>+ [LPC_H55] = {
>+ .name = "H55",
>+ .gpio_version = ICH_V5_GPIO,
>+ },
>+ [LPC_QM57] = {
>+ .name = "QM57",
>+ .gpio_version = ICH_V5_GPIO,
>+ },
>+ [LPC_H57] = {
>+ .name = "H57",
>+ .gpio_version = ICH_V5_GPIO,
>+ },
>+ [LPC_HM55] = {
>+ .name = "HM55",
>+ .gpio_version = ICH_V5_GPIO,
>+ },
>+ [LPC_Q57] = {
>+ .name = "Q57",
>+ .gpio_version = ICH_V5_GPIO,
>+ },
>+ [LPC_HM57] = {
>+ .name = "HM57",
>+ .gpio_version = ICH_V5_GPIO,
>+ },
>+ [LPC_PCHMSFF] = {
>+ .name = "PCH Mobile SFF Full Featured",
>+ .gpio_version = ICH_V5_GPIO,
>+ },
>+ [LPC_QS57] = {
>+ .name = "QS57",
>+ .gpio_version = ICH_V5_GPIO,
>+ },
>+ [LPC_3400] = {
>+ .name = "3400",
>+ .gpio_version = ICH_V5_GPIO,
>+ },
>+ [LPC_3420] = {
>+ .name = "3420",
>+ .gpio_version = ICH_V5_GPIO,
>+ },
>+ [LPC_3450] = {
>+ .name = "3450",
>+ .gpio_version = ICH_V5_GPIO,
>+ },
>+ [LPC_EP80579] = {
>+ .name = "EP80579",
>+ },
>+ [LPC_CPT] = {
>+ .name = "Cougar Point",
>+ .gpio_version = ICH_V5_GPIO,
>+ },
>+ [LPC_CPTD] = {
>+ .name = "Cougar Point Desktop",
>+ .gpio_version = ICH_V5_GPIO,
>+ },
>+ [LPC_CPTM] = {
>+ .name = "Cougar Point Mobile",
>+ .gpio_version = ICH_V5_GPIO,
>+ },
>+ [LPC_PBG] = {
>+ .name = "Patsburg",
>+ },
>+ [LPC_DH89XXCC] = {
>+ .name = "DH89xxCC",
>+ },
>+ [LPC_PPT] = {
>+ .name = "Panther Point",
>+ },
>+ [LPC_LPT] = {
>+ .name = "Lynx Point",
>+ },
>+};
>+
>+/*
>+ * This data only exists for exporting the supported PCI ids
>+ * via MODULE_DEVICE_TABLE. We do not actually register a
>+ * pci_driver, because the I/O Controller Hub has also other
>+ * functions that probably will be registered by other drivers.
>+ */
>+static DEFINE_PCI_DEVICE_TABLE(lpc_ich_ids) = {
>+ { PCI_VDEVICE(INTEL, 0x2410), LPC_ICH},
>+ { PCI_VDEVICE(INTEL, 0x2420), LPC_ICH0},
>+ { PCI_VDEVICE(INTEL, 0x2440), LPC_ICH2},
>+ { PCI_VDEVICE(INTEL, 0x244c), LPC_ICH2M},
>+ { PCI_VDEVICE(INTEL, 0x2480), LPC_ICH3},
>+ { PCI_VDEVICE(INTEL, 0x248c), LPC_ICH3M},
>+ { PCI_VDEVICE(INTEL, 0x24c0), LPC_ICH4},
>+ { PCI_VDEVICE(INTEL, 0x24cc), LPC_ICH4M},
>+ { PCI_VDEVICE(INTEL, 0x2450), LPC_CICH},
>+ { PCI_VDEVICE(INTEL, 0x24d0), LPC_ICH5},
>+ { PCI_VDEVICE(INTEL, 0x25a1), LPC_6300ESB},
>+ { PCI_VDEVICE(INTEL, 0x2640), LPC_ICH6},
>+ { PCI_VDEVICE(INTEL, 0x2641), LPC_ICH6M},
>+ { PCI_VDEVICE(INTEL, 0x2642), LPC_ICH6W},
>+ { PCI_VDEVICE(INTEL, 0x2670), LPC_631XESB},
>+ { PCI_VDEVICE(INTEL, 0x2671), LPC_631XESB},
>+ { PCI_VDEVICE(INTEL, 0x2672), LPC_631XESB},
>+ { PCI_VDEVICE(INTEL, 0x2673), LPC_631XESB},
>+ { PCI_VDEVICE(INTEL, 0x2674), LPC_631XESB},
>+ { PCI_VDEVICE(INTEL, 0x2675), LPC_631XESB},
>+ { PCI_VDEVICE(INTEL, 0x2676), LPC_631XESB},
>+ { PCI_VDEVICE(INTEL, 0x2677), LPC_631XESB},
>+ { PCI_VDEVICE(INTEL, 0x2678), LPC_631XESB},
>+ { PCI_VDEVICE(INTEL, 0x2679), LPC_631XESB},
>+ { PCI_VDEVICE(INTEL, 0x267a), LPC_631XESB},
>+ { PCI_VDEVICE(INTEL, 0x267b), LPC_631XESB},
>+ { PCI_VDEVICE(INTEL, 0x267c), LPC_631XESB},
>+ { PCI_VDEVICE(INTEL, 0x267d), LPC_631XESB},
>+ { PCI_VDEVICE(INTEL, 0x267e), LPC_631XESB},
>+ { PCI_VDEVICE(INTEL, 0x267f), LPC_631XESB},
>+ { PCI_VDEVICE(INTEL, 0x27b8), LPC_ICH7},
>+ { PCI_VDEVICE(INTEL, 0x27b0), LPC_ICH7DH},
>+ { PCI_VDEVICE(INTEL, 0x27b9), LPC_ICH7M},
>+ { PCI_VDEVICE(INTEL, 0x27bd), LPC_ICH7MDH},
>+ { PCI_VDEVICE(INTEL, 0x27bc), LPC_NM10},
>+ { PCI_VDEVICE(INTEL, 0x2810), LPC_ICH8},
>+ { PCI_VDEVICE(INTEL, 0x2812), LPC_ICH8DH},
>+ { PCI_VDEVICE(INTEL, 0x2814), LPC_ICH8DO},
>+ { PCI_VDEVICE(INTEL, 0x2815), LPC_ICH8M},
>+ { PCI_VDEVICE(INTEL, 0x2811), LPC_ICH8ME},
>+ { PCI_VDEVICE(INTEL, 0x2918), LPC_ICH9},
>+ { PCI_VDEVICE(INTEL, 0x2916), LPC_ICH9R},
>+ { PCI_VDEVICE(INTEL, 0x2912), LPC_ICH9DH},
>+ { PCI_VDEVICE(INTEL, 0x2914), LPC_ICH9DO},
>+ { PCI_VDEVICE(INTEL, 0x2919), LPC_ICH9M},
>+ { PCI_VDEVICE(INTEL, 0x2917), LPC_ICH9ME},
>+ { PCI_VDEVICE(INTEL, 0x3a18), LPC_ICH10},
>+ { PCI_VDEVICE(INTEL, 0x3a16), LPC_ICH10R},
>+ { PCI_VDEVICE(INTEL, 0x3a1a), LPC_ICH10D},
>+ { PCI_VDEVICE(INTEL, 0x3a14), LPC_ICH10DO},
>+ { PCI_VDEVICE(INTEL, 0x3b00), LPC_PCH},
>+ { PCI_VDEVICE(INTEL, 0x3b01), LPC_PCHM},
>+ { PCI_VDEVICE(INTEL, 0x3b02), LPC_P55},
>+ { PCI_VDEVICE(INTEL, 0x3b03), LPC_PM55},
>+ { PCI_VDEVICE(INTEL, 0x3b06), LPC_H55},
>+ { PCI_VDEVICE(INTEL, 0x3b07), LPC_QM57},
>+ { PCI_VDEVICE(INTEL, 0x3b08), LPC_H57},
>+ { PCI_VDEVICE(INTEL, 0x3b09), LPC_HM55},
>+ { PCI_VDEVICE(INTEL, 0x3b0a), LPC_Q57},
>+ { PCI_VDEVICE(INTEL, 0x3b0b), LPC_HM57},
>+ { PCI_VDEVICE(INTEL, 0x3b0d), LPC_PCHMSFF},
>+ { PCI_VDEVICE(INTEL, 0x3b0f), LPC_QS57},
>+ { PCI_VDEVICE(INTEL, 0x3b12), LPC_3400},
>+ { PCI_VDEVICE(INTEL, 0x3b14), LPC_3420},
>+ { PCI_VDEVICE(INTEL, 0x3b16), LPC_3450},
>+ { PCI_VDEVICE(INTEL, 0x5031), LPC_EP80579},
>+ { PCI_VDEVICE(INTEL, 0x1c41), LPC_CPT},
>+ { PCI_VDEVICE(INTEL, 0x1c42), LPC_CPTD},
>+ { PCI_VDEVICE(INTEL, 0x1c43), LPC_CPTM},
>+ { PCI_VDEVICE(INTEL, 0x1c44), LPC_CPT},
>+ { PCI_VDEVICE(INTEL, 0x1c45), LPC_CPT},
>+ { PCI_VDEVICE(INTEL, 0x1c46), LPC_CPT},
>+ { PCI_VDEVICE(INTEL, 0x1c47), LPC_CPT},
>+ { PCI_VDEVICE(INTEL, 0x1c48), LPC_CPT},
>+ { PCI_VDEVICE(INTEL, 0x1c49), LPC_CPT},
>+ { PCI_VDEVICE(INTEL, 0x1c4a), LPC_CPT},
>+ { PCI_VDEVICE(INTEL, 0x1c4b), LPC_CPT},
>+ { PCI_VDEVICE(INTEL, 0x1c4c), LPC_CPT},
>+ { PCI_VDEVICE(INTEL, 0x1c4d), LPC_CPT},
>+ { PCI_VDEVICE(INTEL, 0x1c4e), LPC_CPT},
>+ { PCI_VDEVICE(INTEL, 0x1c4f), LPC_CPT},
>+ { PCI_VDEVICE(INTEL, 0x1c50), LPC_CPT},
>+ { PCI_VDEVICE(INTEL, 0x1c51), LPC_CPT},
>+ { PCI_VDEVICE(INTEL, 0x1c52), LPC_CPT},
>+ { PCI_VDEVICE(INTEL, 0x1c53), LPC_CPT},
>+ { PCI_VDEVICE(INTEL, 0x1c54), LPC_CPT},
>+ { PCI_VDEVICE(INTEL, 0x1c55), LPC_CPT},
>+ { PCI_VDEVICE(INTEL, 0x1c56), LPC_CPT},
>+ { PCI_VDEVICE(INTEL, 0x1c57), LPC_CPT},
>+ { PCI_VDEVICE(INTEL, 0x1c58), LPC_CPT},
>+ { PCI_VDEVICE(INTEL, 0x1c59), LPC_CPT},
>+ { PCI_VDEVICE(INTEL, 0x1c5a), LPC_CPT},
>+ { PCI_VDEVICE(INTEL, 0x1c5b), LPC_CPT},
>+ { PCI_VDEVICE(INTEL, 0x1c5c), LPC_CPT},
>+ { PCI_VDEVICE(INTEL, 0x1c5d), LPC_CPT},
>+ { PCI_VDEVICE(INTEL, 0x1c5e), LPC_CPT},
>+ { PCI_VDEVICE(INTEL, 0x1c5f), LPC_CPT},
>+ { PCI_VDEVICE(INTEL, 0x1d40), LPC_PBG},
>+ { PCI_VDEVICE(INTEL, 0x1d41), LPC_PBG},
>+ { PCI_VDEVICE(INTEL, 0x2310), LPC_DH89XXCC},
>+ { PCI_VDEVICE(INTEL, 0x1e40), LPC_PPT},
>+ { PCI_VDEVICE(INTEL, 0x1e41), LPC_PPT},
>+ { PCI_VDEVICE(INTEL, 0x1e42), LPC_PPT},
>+ { PCI_VDEVICE(INTEL, 0x1e43), LPC_PPT},
>+ { PCI_VDEVICE(INTEL, 0x1e44), LPC_PPT},
>+ { PCI_VDEVICE(INTEL, 0x1e45), LPC_PPT},
>+ { PCI_VDEVICE(INTEL, 0x1e46), LPC_PPT},
>+ { PCI_VDEVICE(INTEL, 0x1e47), LPC_PPT},
>+ { PCI_VDEVICE(INTEL, 0x1e48), LPC_PPT},
>+ { PCI_VDEVICE(INTEL, 0x1e49), LPC_PPT},
>+ { PCI_VDEVICE(INTEL, 0x1e4a), LPC_PPT},
>+ { PCI_VDEVICE(INTEL, 0x1e4b), LPC_PPT},
>+ { PCI_VDEVICE(INTEL, 0x1e4c), LPC_PPT},
>+ { PCI_VDEVICE(INTEL, 0x1e4d), LPC_PPT},
>+ { PCI_VDEVICE(INTEL, 0x1e4e), LPC_PPT},
>+ { PCI_VDEVICE(INTEL, 0x1e4f), LPC_PPT},
>+ { PCI_VDEVICE(INTEL, 0x1e50), LPC_PPT},
>+ { PCI_VDEVICE(INTEL, 0x1e51), LPC_PPT},
>+ { PCI_VDEVICE(INTEL, 0x1e52), LPC_PPT},
>+ { PCI_VDEVICE(INTEL, 0x1e53), LPC_PPT},
>+ { PCI_VDEVICE(INTEL, 0x1e54), LPC_PPT},
>+ { PCI_VDEVICE(INTEL, 0x1e55), LPC_PPT},
>+ { PCI_VDEVICE(INTEL, 0x1e56), LPC_PPT},
>+ { PCI_VDEVICE(INTEL, 0x1e57), LPC_PPT},
>+ { PCI_VDEVICE(INTEL, 0x1e58), LPC_PPT},
>+ { PCI_VDEVICE(INTEL, 0x1e59), LPC_PPT},
>+ { PCI_VDEVICE(INTEL, 0x1e5a), LPC_PPT},
>+ { PCI_VDEVICE(INTEL, 0x1e5b), LPC_PPT},
>+ { PCI_VDEVICE(INTEL, 0x1e5c), LPC_PPT},
>+ { PCI_VDEVICE(INTEL, 0x1e5d), LPC_PPT},
>+ { PCI_VDEVICE(INTEL, 0x1e5e), LPC_PPT},
>+ { PCI_VDEVICE(INTEL, 0x1e5f), LPC_PPT},
>+ { PCI_VDEVICE(INTEL, 0x8c40), LPC_LPT},
>+ { PCI_VDEVICE(INTEL, 0x8c41), LPC_LPT},
>+ { PCI_VDEVICE(INTEL, 0x8c42), LPC_LPT},
>+ { PCI_VDEVICE(INTEL, 0x8c43), LPC_LPT},
>+ { PCI_VDEVICE(INTEL, 0x8c44), LPC_LPT},
>+ { PCI_VDEVICE(INTEL, 0x8c45), LPC_LPT},
>+ { PCI_VDEVICE(INTEL, 0x8c46), LPC_LPT},
>+ { PCI_VDEVICE(INTEL, 0x8c47), LPC_LPT},
>+ { PCI_VDEVICE(INTEL, 0x8c48), LPC_LPT},
>+ { PCI_VDEVICE(INTEL, 0x8c49), LPC_LPT},
>+ { PCI_VDEVICE(INTEL, 0x8c4a), LPC_LPT},
>+ { PCI_VDEVICE(INTEL, 0x8c4b), LPC_LPT},
>+ { PCI_VDEVICE(INTEL, 0x8c4c), LPC_LPT},
>+ { PCI_VDEVICE(INTEL, 0x8c4d), LPC_LPT},
>+ { PCI_VDEVICE(INTEL, 0x8c4e), LPC_LPT},
>+ { PCI_VDEVICE(INTEL, 0x8c4f), LPC_LPT},
>+ { PCI_VDEVICE(INTEL, 0x8c50), LPC_LPT},
>+ { PCI_VDEVICE(INTEL, 0x8c51), LPC_LPT},
>+ { PCI_VDEVICE(INTEL, 0x8c52), LPC_LPT},
>+ { PCI_VDEVICE(INTEL, 0x8c53), LPC_LPT},
>+ { PCI_VDEVICE(INTEL, 0x8c54), LPC_LPT},
>+ { PCI_VDEVICE(INTEL, 0x8c55), LPC_LPT},
>+ { PCI_VDEVICE(INTEL, 0x8c56), LPC_LPT},
>+ { PCI_VDEVICE(INTEL, 0x8c57), LPC_LPT},
>+ { PCI_VDEVICE(INTEL, 0x8c58), LPC_LPT},
>+ { PCI_VDEVICE(INTEL, 0x8c59), LPC_LPT},
>+ { PCI_VDEVICE(INTEL, 0x8c5a), LPC_LPT},
>+ { PCI_VDEVICE(INTEL, 0x8c5b), LPC_LPT},
>+ { PCI_VDEVICE(INTEL, 0x8c5c), LPC_LPT},
>+ { PCI_VDEVICE(INTEL, 0x8c5d), LPC_LPT},
>+ { PCI_VDEVICE(INTEL, 0x8c5e), LPC_LPT},
>+ { PCI_VDEVICE(INTEL, 0x8c5f), LPC_LPT},
>+ { 0, }, /* End of list */
>+};
>+MODULE_DEVICE_TABLE(pci, lpc_ich_ids);
>+
>+static void lpc_ich_restore_config_space(struct pci_dev *dev)
>+{
>+ if (lpc_ich_acpi_save >= 0) {
>+ pci_write_config_byte(dev, ACPICTRL, lpc_ich_acpi_save);
>+ lpc_ich_acpi_save = -1;
>+ }
>+
>+ if (lpc_ich_gpio_save >= 0) {
>+ pci_write_config_byte(dev, GPIOCTRL, lpc_ich_gpio_save);
>+ lpc_ich_gpio_save = -1;
>+ }
>+}
>+
>+static void __devinit lpc_ich_enable_acpi_space(struct pci_dev *dev)
>+{
>+ u8 reg_save;
>+
>+ pci_read_config_byte(dev, ACPICTRL, ®_save);
>+ pci_write_config_byte(dev, ACPICTRL, reg_save | 0x10);
>+ lpc_ich_acpi_save = reg_save;
>+}
>+
>+static void __devinit lpc_ich_enable_gpio_space(struct pci_dev *dev)
>+{
>+ u8 reg_save;
>+
>+ pci_read_config_byte(dev, GPIOCTRL, ®_save);
>+ pci_write_config_byte(dev, GPIOCTRL, reg_save | 0x10);
>+ lpc_ich_gpio_save = reg_save;
>+}
>+
>+static void __devinit lpc_ich_finalize_cell(struct mfd_cell *cell,
>+ const struct pci_device_id *id)
>+{
>+ cell->platform_data = &lpc_chipset_info[id->driver_data];
>+ cell->pdata_size = sizeof(struct lpc_ich_info);
>+}
>+
>+static int __devinit lpc_ich_init_gpio(struct pci_dev *dev,
>+ const struct pci_device_id *id)
>+{
>+ u32 base_addr_cfg;
>+ u32 base_addr;
>+ int ret;
>+ bool acpi_conflict = false;
>+ struct resource *res;
>+
>+ /* Setup power management base register */
>+ pci_read_config_dword(dev, ACPIBASE, &base_addr_cfg);
>+ base_addr = base_addr_cfg & 0x0000ff80;
>+ if (!base_addr) {
>+ dev_err(&dev->dev, "I/O space for ACPI uninitialized\n");
>+ lpc_ich_cells[LPC_GPIO].num_resources--;
>+ goto gpe0_done;
>+ }
>+
>+ res = &gpio_ich_res[ICH_RES_GPE0];
>+ res->start = base_addr + ACPIBASE_GPE_OFF;
>+ res->end = base_addr + ACPIBASE_GPE_END;
>+ ret = acpi_check_resource_conflict(res);
>+ if (ret) {
>+ /*
>+ * This isn't fatal for the GPIO, but we have to make sure that
>+ * the platform_device subsystem doesn't see this resource
>+ * or it will register an invalid region.
>+ */
>+ lpc_ich_cells[LPC_GPIO].num_resources--;
>+ acpi_conflict = true;
>+ } else {
>+ lpc_ich_enable_acpi_space(dev);
>+ }
>+
>+gpe0_done:
>+ /* Setup GPIO base register */
>+ pci_read_config_dword(dev, GPIOBASE, &base_addr_cfg);
>+ base_addr = base_addr_cfg & 0x0000ff80;
>+ if (!base_addr) {
>+ dev_err(&dev->dev, "I/O space for GPIO uninitialized\n");
>+ ret = -ENODEV;
>+ goto gpio_done;
>+ }
>+
>+ /* Older devices provide fewer GPIO and have a smaller
>resource size. */
>+ res = &gpio_ich_res[ICH_RES_GPIO];
>+ res->start = base_addr;
>+ switch (lpc_chipset_info[id->driver_data].gpio_version) {
>+ case ICH_V5_GPIO:
>+ case ICH_V10CORP_GPIO:
>+ res->end = res->start + 128 - 1;
break;
>+ default:
>+ res->end = res->start + 64 - 1;
break;
>+ }
>+
>+ ret = acpi_check_resource_conflict(res);
>+ if (ret) {
>+ /* this isn't necessarily fatal for the GPIO */
>+ acpi_conflict = true;
>+ goto gpio_done;
>+ }
>+ lpc_ich_enable_gpio_space(dev);
>+
>+ lpc_ich_finalize_cell(&lpc_ich_cells[LPC_GPIO], id);
>+ ret = mfd_add_devices(&dev->dev, -1, &lpc_ich_cells[LPC_GPIO],
>+ 1, NULL, 0);
>+
>+gpio_done:
>+ if (acpi_conflict)
>+ pr_warn("Resource conflict(s) found affecting %s\n",
>+ lpc_ich_cells[LPC_GPIO].name);
>+ return ret;
>+}
>+
>+static int __devinit lpc_ich_probe(struct pci_dev *dev,
>+ const struct pci_device_id *id)
>+{
>+ int ret;
>+ bool cell_added = false;
>+
>+ ret = lpc_ich_init_gpio(dev, id);
>+ if (!ret)
>+ cell_added = true;
>+
>+ /*
>+ * We only care if at least one or none of the cells registered
>+ * successfully.
>+ */
>+ if (!cell_added) {
>+ lpc_ich_restore_config_space(dev);
>+ return -ENODEV;
>+ }
>+
>+ return 0;
>+}
>+
>+static void __devexit lpc_ich_remove(struct pci_dev *dev)
>+{
>+ mfd_remove_devices(&dev->dev);
>+ lpc_ich_restore_config_space(dev);
>+}
>+
>+static struct pci_driver lpc_ich_driver = {
>+ .name = "lpc_ich",
>+ .id_table = lpc_ich_ids,
>+ .probe = lpc_ich_probe,
>+ .remove = __devexit_p(lpc_ich_remove),
>+};
>+
>+static int __init lpc_ich_init(void)
>+{
>+ return pci_register_driver(&lpc_ich_driver);
>+}
>+
>+static void __exit lpc_ich_exit(void)
>+{
>+ pci_unregister_driver(&lpc_ich_driver);
>+}
>+
>+module_init(lpc_ich_init);
>+module_exit(lpc_ich_exit);
>+
>+MODULE_AUTHOR("Aaron Sierra <asierra@...-inc.com>");
>+MODULE_DESCRIPTION("LPC interface for Intel ICH");
>+MODULE_LICENSE("GPL");
>diff --git a/include/linux/mfd/lpc_ich.h b/include/linux/mfd/lpc_ich.h
>new file mode 100644
>index 0000000..91300b1
>--- /dev/null
>+++ b/include/linux/mfd/lpc_ich.h
>@@ -0,0 +1,41 @@
>+/*
>+ * linux/drivers/mfd/lpc_ich.h
>+ *
>+ * Copyright (c) 2012 Extreme Engineering Solution, Inc.
>+ * Author: Aaron Sierra <asierra@...-inc.com>
>+ *
>+ * 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.
>+ *
>+ * You should have received a copy of the GNU General Public License
>+ * along with this program; see the file COPYING. If not, write to
>+ * the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
>+ */
>+#ifndef LPC_ICH_H
>+#define LPC_ICH_H
>+
>+/* GPIO resources */
>+#define ICH_RES_GPIO 0
>+#define ICH_RES_GPE0 1
>+
>+/* GPIO compatibility */
>+#define ICH_I3100_GPIO 0x401
>+#define ICH_V5_GPIO 0x501
>+#define ICH_V6_GPIO 0x601
>+#define ICH_V7_GPIO 0x701
>+#define ICH_V9_GPIO 0x801
>+#define ICH_V10CORP_GPIO 0xa01
>+#define ICH_V10CONS_GPIO 0xa11
>+
>+struct lpc_ich_info {
>+ char name[32];
>+ unsigned int gpio_version;
>+};
>+
>+#endif
>--
>1.7.0.4
--
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