![Linus Torvalds](/assets/img/avatar_default.png)
- Update the ACPICA code in the kernel to upstream revision 20170303 which includes: * Minor fixes and improvements in the core code (Bob Moore, Seunghun Han). * Debugger fixes (Colin Ian King, Lv Zheng). * Compiler/disassembler improvements (Bob Moore, David Box, Lv Zheng). * Build-related update (Lv Zheng). - Add new device IDs and platform-related information to the ACPI drivers for Intel (LPSS) and AMD (APD) SoCs (Hanjun Guo, Hans de Goede). - Make it possible to quirk ACPI-enumerated devices as "always present" on platforms where they are incorrectly reported as not present by the AML and add the INT0002 device ID to the list of "always present" devices (Hans de Goede). - Fix the register information in the xpower PMIC driver and add comments to map the registers to symbols used by AML to it (Hans de Goede). - Move the code turning off unused ACPI power resources during system resume to a point after all devices have been resumed to avoid issues with power resources that do not behave as expected (Hans de Goede). -----BEGIN PGP SIGNATURE----- Version: GnuPG v2 iQIcBAABCAAGBQJZEkXjAAoJEILEb/54YlRxWQ4QAIymQKPRXS6g8/5qZ8w5YNY+ gLHkEzANPW3JHTUwv2hxfPP4AWYnDwTSg5g3RVue0R+tj49ERNsDoaFXBJ8L3wlA bLr9VFXPtzX5yuFD1MGeDWeUqGwuTJztWcMAkzpRgbj+6ppjJForObM76XFB3Pmn t5XUs0Tjlahqhg59GCHkt+kGeL5BOayLvIQt17IxQiAzAi3SY4P/qcq6qG2hY7BX 0PB/zodPfCQpbcReKMDGfQlhxSWgcoQiCoBmmx0YIQfTQzmvWUejek1GcSUfJu1C Hx/ndBiAWkJ7m77LMAyQT9FgRsp9GkDllYhXJ+rmAWFuqNrEpTFJjY6q3wXxMyMl T39BWPFfauatEmDYXXLWpUuFaxX+VJ5nNlUtHGDm3xP/NI4ARiAUowk6haFfR1nx YmBon4VPzG2cf6wnXKI2rdWIbkKLkDYLPpzBpvUxswkPNtEF2/272nPwo0nqfTms S3ddyRhYBnht1JgDPf/nAyUOK0jowxWlFEBsKvLUZ0faHuIhAS4FEO8DNxVnhP0b m1nlZFctJeRCcI11mva5Tob9w8w5Z7WslfoTLQ9eFBl6RJdmy05s8d/CQYI9hK15 EmVIRRqJ+G4gNHdcV26+JKBWgrJv6WSmf32QBXDCT94C4iZrqxXmccvY7s2tZEJR 7VEo/7Ck70xbNcvEOn3c =Ytsi -----END PGP SIGNATURE----- Merge tag 'acpi-extra-4.12-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm Pull more ACPI updates from Rafael Wysocki: "These update the ACPICA code in the kernel to upstream revision 20170303 which adds a few minor fixes and improvements, update ACPI SoC drivers with new device IDs, platform-related information and similar, fix the register information in the xpower PMIC driver, introduce a concept of "always present" devices to the ACPI device enumeration code and use it to fix a problem with one platform, and fix a system resume issue related to power resources. Specifics: - Update the ACPICA code in the kernel to upstream revision 20170303 which includes: * Minor fixes and improvements in the core code (Bob Moore, Seunghun Han). * Debugger fixes (Colin Ian King, Lv Zheng). * Compiler/disassembler improvements (Bob Moore, David Box, Lv Zheng). * Build-related update (Lv Zheng). - Add new device IDs and platform-related information to the ACPI drivers for Intel (LPSS) and AMD (APD) SoCs (Hanjun Guo, Hans de Goede). - Make it possible to quirk ACPI-enumerated devices as "always present" on platforms where they are incorrectly reported as not present by the AML and add the INT0002 device ID to the list of "always present" devices (Hans de Goede). - Fix the register information in the xpower PMIC driver and add comments to map the registers to symbols used by AML to it (Hans de Goede). - Move the code turning off unused ACPI power resources during system resume to a point after all devices have been resumed to avoid issues with power resources that do not behave as expected (Hans de Goede)" * tag 'acpi-extra-4.12-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm: (22 commits) ACPI / power: Delay turning off unused power resources after suspend ACPI / PMIC: xpower: Fix power_table addresses ACPI / LPSS: Call pwm_add_table() for Bay Trail PWM device ACPICA: Update version to 20170303 ACPICA: iasl: add ASL conversion tool ACPICA: Local cache support: Allow small cache objects ACPICA: Disassembler: Do not unconditionally remove temporary names ACPICA: iasl: Fix IORT SMMU GSI disassembling ACPICA: Cleanup AML opcode definitions, no functional change ACPICA: Debugger: Add interpreter blocking mark for single-step mode ACPICA: debugger: fix memory leak on Pathname ACPICA: Update for automatic repair code for objects returned by evaluate_object ACPICA: Namespace: fix operand cache leak ACPICA: Fix several incorrect invocations of ACPICA return macro ACPICA: Fix a module for excessive debug output ACPICA: Update some function headers, no funtional change ACPICA: Disassembler: Enhance resource descriptor detection i2c: designware: Add ACPI HID for Hisilicon Hip07/08 I2C controller ACPI / APD: Add clock frequency for Hisilicon Hip07/08 I2C controller ACPI / bus: Add INT0002 to list of always-present devices ...
453 lines
11 KiB
C
453 lines
11 KiB
C
/*
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* Synopsys DesignWare I2C adapter driver (master only).
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*
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* Based on the TI DAVINCI I2C adapter driver.
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*
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* Copyright (C) 2006 Texas Instruments.
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* Copyright (C) 2007 MontaVista Software Inc.
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* Copyright (C) 2009 Provigent Ltd.
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*
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* ----------------------------------------------------------------------------
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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* ----------------------------------------------------------------------------
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*
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*/
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/delay.h>
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#include <linux/dmi.h>
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#include <linux/i2c.h>
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#include <linux/clk.h>
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#include <linux/clk-provider.h>
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#include <linux/errno.h>
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#include <linux/sched.h>
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#include <linux/err.h>
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#include <linux/interrupt.h>
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#include <linux/of.h>
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#include <linux/platform_device.h>
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#include <linux/pm.h>
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#include <linux/pm_runtime.h>
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#include <linux/property.h>
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#include <linux/io.h>
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#include <linux/reset.h>
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#include <linux/slab.h>
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#include <linux/acpi.h>
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#include <linux/platform_data/i2c-designware.h>
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#include "i2c-designware-core.h"
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static u32 i2c_dw_get_clk_rate_khz(struct dw_i2c_dev *dev)
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{
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return clk_get_rate(dev->clk)/1000;
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}
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#ifdef CONFIG_ACPI
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/*
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* The HCNT/LCNT information coming from ACPI should be the most accurate
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* for given platform. However, some systems get it wrong. On such systems
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* we get better results by calculating those based on the input clock.
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*/
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static const struct dmi_system_id dw_i2c_no_acpi_params[] = {
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{
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.ident = "Dell Inspiron 7348",
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.matches = {
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DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
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DMI_MATCH(DMI_PRODUCT_NAME, "Inspiron 7348"),
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},
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},
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{ }
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};
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static void dw_i2c_acpi_params(struct platform_device *pdev, char method[],
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u16 *hcnt, u16 *lcnt, u32 *sda_hold)
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{
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struct acpi_buffer buf = { ACPI_ALLOCATE_BUFFER };
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acpi_handle handle = ACPI_HANDLE(&pdev->dev);
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union acpi_object *obj;
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if (dmi_check_system(dw_i2c_no_acpi_params))
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return;
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if (ACPI_FAILURE(acpi_evaluate_object(handle, method, NULL, &buf)))
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return;
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obj = (union acpi_object *)buf.pointer;
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if (obj->type == ACPI_TYPE_PACKAGE && obj->package.count == 3) {
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const union acpi_object *objs = obj->package.elements;
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*hcnt = (u16)objs[0].integer.value;
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*lcnt = (u16)objs[1].integer.value;
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*sda_hold = (u32)objs[2].integer.value;
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}
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kfree(buf.pointer);
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}
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static int dw_i2c_acpi_configure(struct platform_device *pdev)
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{
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struct dw_i2c_dev *dev = platform_get_drvdata(pdev);
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acpi_handle handle = ACPI_HANDLE(&pdev->dev);
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const struct acpi_device_id *id;
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struct acpi_device *adev;
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const char *uid;
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dev->adapter.nr = -1;
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dev->tx_fifo_depth = 32;
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dev->rx_fifo_depth = 32;
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/*
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* Try to get SDA hold time and *CNT values from an ACPI method for
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* selected speed modes.
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*/
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switch (dev->clk_freq) {
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case 100000:
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dw_i2c_acpi_params(pdev, "SSCN", &dev->ss_hcnt, &dev->ss_lcnt,
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&dev->sda_hold_time);
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break;
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case 1000000:
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dw_i2c_acpi_params(pdev, "FPCN", &dev->fp_hcnt, &dev->fp_lcnt,
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&dev->sda_hold_time);
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break;
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case 3400000:
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dw_i2c_acpi_params(pdev, "HSCN", &dev->hs_hcnt, &dev->hs_lcnt,
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&dev->sda_hold_time);
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break;
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case 400000:
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default:
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dw_i2c_acpi_params(pdev, "FMCN", &dev->fs_hcnt, &dev->fs_lcnt,
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&dev->sda_hold_time);
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break;
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}
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id = acpi_match_device(pdev->dev.driver->acpi_match_table, &pdev->dev);
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if (id && id->driver_data)
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dev->flags |= (u32)id->driver_data;
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if (acpi_bus_get_device(handle, &adev))
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return -ENODEV;
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/*
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* Cherrytrail I2C7 gets used for the PMIC which gets accessed
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* through ACPI opregions during late suspend / early resume
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* disable pm for it.
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*/
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uid = adev->pnp.unique_id;
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if ((dev->flags & MODEL_CHERRYTRAIL) && !strcmp(uid, "7"))
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dev->pm_disabled = true;
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return 0;
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}
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static const struct acpi_device_id dw_i2c_acpi_match[] = {
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{ "INT33C2", 0 },
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{ "INT33C3", 0 },
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{ "INT3432", 0 },
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{ "INT3433", 0 },
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{ "80860F41", 0 },
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{ "808622C1", MODEL_CHERRYTRAIL },
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{ "AMD0010", ACCESS_INTR_MASK },
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{ "AMDI0010", ACCESS_INTR_MASK },
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{ "AMDI0510", 0 },
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{ "APMC0D0F", 0 },
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{ "HISI02A1", 0 },
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{ "HISI02A2", 0 },
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{ }
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};
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MODULE_DEVICE_TABLE(acpi, dw_i2c_acpi_match);
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#else
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static inline int dw_i2c_acpi_configure(struct platform_device *pdev)
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{
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return -ENODEV;
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}
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#endif
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static int i2c_dw_plat_prepare_clk(struct dw_i2c_dev *i_dev, bool prepare)
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{
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if (IS_ERR(i_dev->clk))
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return PTR_ERR(i_dev->clk);
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if (prepare)
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return clk_prepare_enable(i_dev->clk);
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clk_disable_unprepare(i_dev->clk);
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return 0;
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}
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static void dw_i2c_set_fifo_size(struct dw_i2c_dev *dev, int id)
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{
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u32 param, tx_fifo_depth, rx_fifo_depth;
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/*
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* Try to detect the FIFO depth if not set by interface driver,
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* the depth could be from 2 to 256 from HW spec.
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*/
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param = i2c_dw_read_comp_param(dev);
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tx_fifo_depth = ((param >> 16) & 0xff) + 1;
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rx_fifo_depth = ((param >> 8) & 0xff) + 1;
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if (!dev->tx_fifo_depth) {
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dev->tx_fifo_depth = tx_fifo_depth;
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dev->rx_fifo_depth = rx_fifo_depth;
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dev->adapter.nr = id;
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} else if (tx_fifo_depth >= 2) {
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dev->tx_fifo_depth = min_t(u32, dev->tx_fifo_depth,
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tx_fifo_depth);
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dev->rx_fifo_depth = min_t(u32, dev->rx_fifo_depth,
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rx_fifo_depth);
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}
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}
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static int dw_i2c_plat_probe(struct platform_device *pdev)
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{
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struct dw_i2c_platform_data *pdata = dev_get_platdata(&pdev->dev);
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struct dw_i2c_dev *dev;
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struct i2c_adapter *adap;
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struct resource *mem;
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int irq, r;
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u32 acpi_speed, ht = 0;
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irq = platform_get_irq(pdev, 0);
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if (irq < 0)
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return irq;
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dev = devm_kzalloc(&pdev->dev, sizeof(struct dw_i2c_dev), GFP_KERNEL);
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if (!dev)
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return -ENOMEM;
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mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
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dev->base = devm_ioremap_resource(&pdev->dev, mem);
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if (IS_ERR(dev->base))
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return PTR_ERR(dev->base);
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dev->dev = &pdev->dev;
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dev->irq = irq;
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platform_set_drvdata(pdev, dev);
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dev->rst = devm_reset_control_get_optional_exclusive(&pdev->dev, NULL);
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if (IS_ERR(dev->rst)) {
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if (PTR_ERR(dev->rst) == -EPROBE_DEFER)
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return -EPROBE_DEFER;
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} else {
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reset_control_deassert(dev->rst);
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}
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if (pdata) {
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dev->clk_freq = pdata->i2c_scl_freq;
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} else {
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device_property_read_u32(&pdev->dev, "i2c-sda-hold-time-ns",
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&ht);
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device_property_read_u32(&pdev->dev, "i2c-sda-falling-time-ns",
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&dev->sda_falling_time);
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device_property_read_u32(&pdev->dev, "i2c-scl-falling-time-ns",
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&dev->scl_falling_time);
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device_property_read_u32(&pdev->dev, "clock-frequency",
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&dev->clk_freq);
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}
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acpi_speed = i2c_acpi_find_bus_speed(&pdev->dev);
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/*
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* Find bus speed from the "clock-frequency" device property, ACPI
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* or by using fast mode if neither is set.
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*/
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if (acpi_speed && dev->clk_freq)
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dev->clk_freq = min(dev->clk_freq, acpi_speed);
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else if (acpi_speed || dev->clk_freq)
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dev->clk_freq = max(dev->clk_freq, acpi_speed);
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else
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dev->clk_freq = 400000;
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if (has_acpi_companion(&pdev->dev))
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dw_i2c_acpi_configure(pdev);
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/*
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* Only standard mode at 100kHz, fast mode at 400kHz,
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* fast mode plus at 1MHz and high speed mode at 3.4MHz are supported.
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*/
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if (dev->clk_freq != 100000 && dev->clk_freq != 400000
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&& dev->clk_freq != 1000000 && dev->clk_freq != 3400000) {
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dev_err(&pdev->dev,
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"Only 100kHz, 400kHz, 1MHz and 3.4MHz supported");
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r = -EINVAL;
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goto exit_reset;
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}
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r = i2c_dw_probe_lock_support(dev);
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if (r)
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goto exit_reset;
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dev->functionality = I2C_FUNC_10BIT_ADDR | DW_IC_DEFAULT_FUNCTIONALITY;
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dev->master_cfg = DW_IC_CON_MASTER | DW_IC_CON_SLAVE_DISABLE |
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DW_IC_CON_RESTART_EN;
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switch (dev->clk_freq) {
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case 100000:
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dev->master_cfg |= DW_IC_CON_SPEED_STD;
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break;
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case 3400000:
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dev->master_cfg |= DW_IC_CON_SPEED_HIGH;
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break;
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default:
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dev->master_cfg |= DW_IC_CON_SPEED_FAST;
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}
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dev->clk = devm_clk_get(&pdev->dev, NULL);
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if (!i2c_dw_plat_prepare_clk(dev, true)) {
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dev->get_clk_rate_khz = i2c_dw_get_clk_rate_khz;
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if (!dev->sda_hold_time && ht)
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dev->sda_hold_time = div_u64(
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(u64)dev->get_clk_rate_khz(dev) * ht + 500000,
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1000000);
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}
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dw_i2c_set_fifo_size(dev, pdev->id);
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adap = &dev->adapter;
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adap->owner = THIS_MODULE;
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adap->class = I2C_CLASS_DEPRECATED;
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ACPI_COMPANION_SET(&adap->dev, ACPI_COMPANION(&pdev->dev));
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adap->dev.of_node = pdev->dev.of_node;
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if (dev->pm_disabled) {
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pm_runtime_forbid(&pdev->dev);
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} else {
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pm_runtime_set_autosuspend_delay(&pdev->dev, 1000);
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pm_runtime_use_autosuspend(&pdev->dev);
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pm_runtime_set_active(&pdev->dev);
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pm_runtime_enable(&pdev->dev);
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}
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r = i2c_dw_probe(dev);
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if (r)
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goto exit_probe;
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return r;
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exit_probe:
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if (!dev->pm_disabled)
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pm_runtime_disable(&pdev->dev);
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exit_reset:
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if (!IS_ERR_OR_NULL(dev->rst))
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reset_control_assert(dev->rst);
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return r;
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}
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static int dw_i2c_plat_remove(struct platform_device *pdev)
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{
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struct dw_i2c_dev *dev = platform_get_drvdata(pdev);
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pm_runtime_get_sync(&pdev->dev);
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i2c_del_adapter(&dev->adapter);
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i2c_dw_disable(dev);
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pm_runtime_dont_use_autosuspend(&pdev->dev);
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pm_runtime_put_sync(&pdev->dev);
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if (!dev->pm_disabled)
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pm_runtime_disable(&pdev->dev);
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if (!IS_ERR_OR_NULL(dev->rst))
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reset_control_assert(dev->rst);
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i2c_dw_remove_lock_support(dev);
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return 0;
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}
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#ifdef CONFIG_OF
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static const struct of_device_id dw_i2c_of_match[] = {
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{ .compatible = "snps,designware-i2c", },
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{},
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};
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MODULE_DEVICE_TABLE(of, dw_i2c_of_match);
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#endif
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#ifdef CONFIG_PM_SLEEP
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static int dw_i2c_plat_prepare(struct device *dev)
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{
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return pm_runtime_suspended(dev);
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}
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static void dw_i2c_plat_complete(struct device *dev)
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{
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if (dev->power.direct_complete)
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pm_request_resume(dev);
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}
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#else
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#define dw_i2c_plat_prepare NULL
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#define dw_i2c_plat_complete NULL
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#endif
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#ifdef CONFIG_PM
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static int dw_i2c_plat_suspend(struct device *dev)
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{
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struct platform_device *pdev = to_platform_device(dev);
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struct dw_i2c_dev *i_dev = platform_get_drvdata(pdev);
|
|
|
|
i2c_dw_disable(i_dev);
|
|
i2c_dw_plat_prepare_clk(i_dev, false);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int dw_i2c_plat_resume(struct device *dev)
|
|
{
|
|
struct platform_device *pdev = to_platform_device(dev);
|
|
struct dw_i2c_dev *i_dev = platform_get_drvdata(pdev);
|
|
|
|
i2c_dw_plat_prepare_clk(i_dev, true);
|
|
i2c_dw_init(i_dev);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static const struct dev_pm_ops dw_i2c_dev_pm_ops = {
|
|
.prepare = dw_i2c_plat_prepare,
|
|
.complete = dw_i2c_plat_complete,
|
|
SET_SYSTEM_SLEEP_PM_OPS(dw_i2c_plat_suspend, dw_i2c_plat_resume)
|
|
SET_RUNTIME_PM_OPS(dw_i2c_plat_suspend, dw_i2c_plat_resume, NULL)
|
|
};
|
|
|
|
#define DW_I2C_DEV_PMOPS (&dw_i2c_dev_pm_ops)
|
|
#else
|
|
#define DW_I2C_DEV_PMOPS NULL
|
|
#endif
|
|
|
|
/* work with hotplug and coldplug */
|
|
MODULE_ALIAS("platform:i2c_designware");
|
|
|
|
static struct platform_driver dw_i2c_driver = {
|
|
.probe = dw_i2c_plat_probe,
|
|
.remove = dw_i2c_plat_remove,
|
|
.driver = {
|
|
.name = "i2c_designware",
|
|
.of_match_table = of_match_ptr(dw_i2c_of_match),
|
|
.acpi_match_table = ACPI_PTR(dw_i2c_acpi_match),
|
|
.pm = DW_I2C_DEV_PMOPS,
|
|
},
|
|
};
|
|
|
|
static int __init dw_i2c_init_driver(void)
|
|
{
|
|
return platform_driver_register(&dw_i2c_driver);
|
|
}
|
|
subsys_initcall(dw_i2c_init_driver);
|
|
|
|
static void __exit dw_i2c_exit_driver(void)
|
|
{
|
|
platform_driver_unregister(&dw_i2c_driver);
|
|
}
|
|
module_exit(dw_i2c_exit_driver);
|
|
|
|
MODULE_AUTHOR("Baruch Siach <baruch@tkos.co.il>");
|
|
MODULE_DESCRIPTION("Synopsys DesignWare I2C bus adapter");
|
|
MODULE_LICENSE("GPL");
|