diff options
author | Andy Shevchenko <andriy.shevchenko@linux.intel.com> | 2015-07-08 17:45:05 +0300 |
---|---|---|
committer | Thomas Gleixner <tglx@linutronix.de> | 2015-07-16 17:48:47 +0200 |
commit | 23ae2a16bb39d999892a86a65933fe3e9b6b525f (patch) | |
tree | 2b7baf1b560f774e962ee345547f4ed31abd382c /arch/x86/kernel | |
parent | 91780c41a9e03ca6c351a0b2152662139b94b274 (diff) |
x86/platform/iosf_mbi: Move to dedicated folder
Move the driver to arch/x86/platform/intel since it is not a core
kernel code and it is related to many Intel SoCs from different
groups: Atom, MID, etc.
There is no functional change.
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Cc: David E . Box <david.e.box@linux.intel.com>
Link: http://lkml.kernel.org/r/1436366709-17683-2-git-send-email-andriy.shevchenko@linux.intel.com
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Diffstat (limited to 'arch/x86/kernel')
-rw-r--r-- | arch/x86/kernel/Makefile | 1 | ||||
-rw-r--r-- | arch/x86/kernel/iosf_mbi.c | 328 |
2 files changed, 0 insertions, 329 deletions
diff --git a/arch/x86/kernel/Makefile b/arch/x86/kernel/Makefile index 81db53ba9da8..7041f8b5161b 100644 --- a/arch/x86/kernel/Makefile +++ b/arch/x86/kernel/Makefile @@ -107,7 +107,6 @@ obj-$(CONFIG_EFI) += sysfb_efi.o obj-$(CONFIG_PERF_EVENTS) += perf_regs.o obj-$(CONFIG_TRACING) += tracepoint.o -obj-$(CONFIG_IOSF_MBI) += iosf_mbi.o ### # 64 bit specific files diff --git a/arch/x86/kernel/iosf_mbi.c b/arch/x86/kernel/iosf_mbi.c deleted file mode 100644 index 82f8d02f0df2..000000000000 --- a/arch/x86/kernel/iosf_mbi.c +++ /dev/null @@ -1,328 +0,0 @@ -/* - * IOSF-SB MailBox Interface Driver - * Copyright (c) 2013, Intel Corporation. - * - * This program is free software; you can redistribute it and/or modify it - * under the terms and conditions of the GNU General Public License, - * version 2, as published by the Free Software Foundation. - * - * This program is distributed in the hope 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. - * - * - * The IOSF-SB is a fabric bus available on Atom based SOC's that uses a - * mailbox interface (MBI) to communicate with mutiple devices. This - * driver implements access to this interface for those platforms that can - * enumerate the device using PCI. - */ - -#include <linux/module.h> -#include <linux/init.h> -#include <linux/spinlock.h> -#include <linux/pci.h> -#include <linux/debugfs.h> -#include <linux/capability.h> - -#include <asm/iosf_mbi.h> - -#define PCI_DEVICE_ID_BAYTRAIL 0x0F00 -#define PCI_DEVICE_ID_BRASWELL 0x2280 -#define PCI_DEVICE_ID_QUARK_X1000 0x0958 - -static DEFINE_SPINLOCK(iosf_mbi_lock); - -static inline u32 iosf_mbi_form_mcr(u8 op, u8 port, u8 offset) -{ - return (op << 24) | (port << 16) | (offset << 8) | MBI_ENABLE; -} - -static struct pci_dev *mbi_pdev; /* one mbi device */ - -static int iosf_mbi_pci_read_mdr(u32 mcrx, u32 mcr, u32 *mdr) -{ - int result; - - if (!mbi_pdev) - return -ENODEV; - - if (mcrx) { - result = pci_write_config_dword(mbi_pdev, MBI_MCRX_OFFSET, - mcrx); - if (result < 0) - goto fail_read; - } - - result = pci_write_config_dword(mbi_pdev, MBI_MCR_OFFSET, mcr); - if (result < 0) - goto fail_read; - - result = pci_read_config_dword(mbi_pdev, MBI_MDR_OFFSET, mdr); - if (result < 0) - goto fail_read; - - return 0; - -fail_read: - dev_err(&mbi_pdev->dev, "PCI config access failed with %d\n", result); - return result; -} - -static int iosf_mbi_pci_write_mdr(u32 mcrx, u32 mcr, u32 mdr) -{ - int result; - - if (!mbi_pdev) - return -ENODEV; - - result = pci_write_config_dword(mbi_pdev, MBI_MDR_OFFSET, mdr); - if (result < 0) - goto fail_write; - - if (mcrx) { - result = pci_write_config_dword(mbi_pdev, MBI_MCRX_OFFSET, - mcrx); - if (result < 0) - goto fail_write; - } - - result = pci_write_config_dword(mbi_pdev, MBI_MCR_OFFSET, mcr); - if (result < 0) - goto fail_write; - - return 0; - -fail_write: - dev_err(&mbi_pdev->dev, "PCI config access failed with %d\n", result); - return result; -} - -int iosf_mbi_read(u8 port, u8 opcode, u32 offset, u32 *mdr) -{ - u32 mcr, mcrx; - unsigned long flags; - int ret; - - /*Access to the GFX unit is handled by GPU code */ - if (port == BT_MBI_UNIT_GFX) { - WARN_ON(1); - return -EPERM; - } - - mcr = iosf_mbi_form_mcr(opcode, port, offset & MBI_MASK_LO); - mcrx = offset & MBI_MASK_HI; - - spin_lock_irqsave(&iosf_mbi_lock, flags); - ret = iosf_mbi_pci_read_mdr(mcrx, mcr, mdr); - spin_unlock_irqrestore(&iosf_mbi_lock, flags); - - return ret; -} -EXPORT_SYMBOL(iosf_mbi_read); - -int iosf_mbi_write(u8 port, u8 opcode, u32 offset, u32 mdr) -{ - u32 mcr, mcrx; - unsigned long flags; - int ret; - - /*Access to the GFX unit is handled by GPU code */ - if (port == BT_MBI_UNIT_GFX) { - WARN_ON(1); - return -EPERM; - } - - mcr = iosf_mbi_form_mcr(opcode, port, offset & MBI_MASK_LO); - mcrx = offset & MBI_MASK_HI; - - spin_lock_irqsave(&iosf_mbi_lock, flags); - ret = iosf_mbi_pci_write_mdr(mcrx, mcr, mdr); - spin_unlock_irqrestore(&iosf_mbi_lock, flags); - - return ret; -} -EXPORT_SYMBOL(iosf_mbi_write); - -int iosf_mbi_modify(u8 port, u8 opcode, u32 offset, u32 mdr, u32 mask) -{ - u32 mcr, mcrx; - u32 value; - unsigned long flags; - int ret; - - /*Access to the GFX unit is handled by GPU code */ - if (port == BT_MBI_UNIT_GFX) { - WARN_ON(1); - return -EPERM; - } - - mcr = iosf_mbi_form_mcr(opcode, port, offset & MBI_MASK_LO); - mcrx = offset & MBI_MASK_HI; - - spin_lock_irqsave(&iosf_mbi_lock, flags); - - /* Read current mdr value */ - ret = iosf_mbi_pci_read_mdr(mcrx, mcr & MBI_RD_MASK, &value); - if (ret < 0) { - spin_unlock_irqrestore(&iosf_mbi_lock, flags); - return ret; - } - - /* Apply mask */ - value &= ~mask; - mdr &= mask; - value |= mdr; - - /* Write back */ - ret = iosf_mbi_pci_write_mdr(mcrx, mcr | MBI_WR_MASK, value); - - spin_unlock_irqrestore(&iosf_mbi_lock, flags); - - return ret; -} -EXPORT_SYMBOL(iosf_mbi_modify); - -bool iosf_mbi_available(void) -{ - /* Mbi isn't hot-pluggable. No remove routine is provided */ - return mbi_pdev; -} -EXPORT_SYMBOL(iosf_mbi_available); - -#ifdef CONFIG_IOSF_MBI_DEBUG -static u32 dbg_mdr; -static u32 dbg_mcr; -static u32 dbg_mcrx; - -static int mcr_get(void *data, u64 *val) -{ - *val = *(u32 *)data; - return 0; -} - -static int mcr_set(void *data, u64 val) -{ - u8 command = ((u32)val & 0xFF000000) >> 24, - port = ((u32)val & 0x00FF0000) >> 16, - offset = ((u32)val & 0x0000FF00) >> 8; - int err; - - *(u32 *)data = val; - - if (!capable(CAP_SYS_RAWIO)) - return -EACCES; - - if (command & 1u) - err = iosf_mbi_write(port, - command, - dbg_mcrx | offset, - dbg_mdr); - else - err = iosf_mbi_read(port, - command, - dbg_mcrx | offset, - &dbg_mdr); - - return err; -} -DEFINE_SIMPLE_ATTRIBUTE(iosf_mcr_fops, mcr_get, mcr_set , "%llx\n"); - -static struct dentry *iosf_dbg; - -static void iosf_sideband_debug_init(void) -{ - struct dentry *d; - - iosf_dbg = debugfs_create_dir("iosf_sb", NULL); - if (IS_ERR_OR_NULL(iosf_dbg)) - return; - - /* mdr */ - d = debugfs_create_x32("mdr", 0660, iosf_dbg, &dbg_mdr); - if (IS_ERR_OR_NULL(d)) - goto cleanup; - - /* mcrx */ - debugfs_create_x32("mcrx", 0660, iosf_dbg, &dbg_mcrx); - if (IS_ERR_OR_NULL(d)) - goto cleanup; - - /* mcr - initiates mailbox tranaction */ - debugfs_create_file("mcr", 0660, iosf_dbg, &dbg_mcr, &iosf_mcr_fops); - if (IS_ERR_OR_NULL(d)) - goto cleanup; - - return; - -cleanup: - debugfs_remove_recursive(d); -} - -static void iosf_debugfs_init(void) -{ - iosf_sideband_debug_init(); -} - -static void iosf_debugfs_remove(void) -{ - debugfs_remove_recursive(iosf_dbg); -} -#else -static inline void iosf_debugfs_init(void) { } -static inline void iosf_debugfs_remove(void) { } -#endif /* CONFIG_IOSF_MBI_DEBUG */ - -static int iosf_mbi_probe(struct pci_dev *pdev, - const struct pci_device_id *unused) -{ - int ret; - - ret = pci_enable_device(pdev); - if (ret < 0) { - dev_err(&pdev->dev, "error: could not enable device\n"); - return ret; - } - - mbi_pdev = pci_dev_get(pdev); - return 0; -} - -static const struct pci_device_id iosf_mbi_pci_ids[] = { - { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_BAYTRAIL) }, - { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_BRASWELL) }, - { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_QUARK_X1000) }, - { 0, }, -}; -MODULE_DEVICE_TABLE(pci, iosf_mbi_pci_ids); - -static struct pci_driver iosf_mbi_pci_driver = { - .name = "iosf_mbi_pci", - .probe = iosf_mbi_probe, - .id_table = iosf_mbi_pci_ids, -}; - -static int __init iosf_mbi_init(void) -{ - iosf_debugfs_init(); - - return pci_register_driver(&iosf_mbi_pci_driver); -} - -static void __exit iosf_mbi_exit(void) -{ - iosf_debugfs_remove(); - - pci_unregister_driver(&iosf_mbi_pci_driver); - if (mbi_pdev) { - pci_dev_put(mbi_pdev); - mbi_pdev = NULL; - } -} - -module_init(iosf_mbi_init); -module_exit(iosf_mbi_exit); - -MODULE_AUTHOR("David E. Box <david.e.box@linux.intel.com>"); -MODULE_DESCRIPTION("IOSF Mailbox Interface accessor"); -MODULE_LICENSE("GPL v2"); |