// SPDX-License-Identifier: GPL-2.0 /* Copyright (C) 2020 Daniel Palmer */ #include #include #include #include #include #include #include #include #include #include #include #include #define DRIVER_NAME "gpio-msc313" #define MSC313_GPIO_IN BIT(0) #define MSC313_GPIO_OUT BIT(4) #define MSC313_GPIO_OEN BIT(5) /* * These bits need to be saved to correctly restore the * gpio state when resuming from suspend to memory. */ #define MSC313_GPIO_BITSTOSAVE (MSC313_GPIO_OUT | MSC313_GPIO_OEN) /* pad names for fuart, same for all SoCs so far */ #define MSC313_PINNAME_FUART_RX "fuart_rx" #define MSC313_PINNAME_FUART_TX "fuart_tx" #define MSC313_PINNAME_FUART_CTS "fuart_cts" #define MSC313_PINNAME_FUART_RTS "fuart_rts" /* pad names for sr, mercury5 is different */ #define MSC313_PINNAME_SR_IO2 "sr_io2" #define MSC313_PINNAME_SR_IO3 "sr_io3" #define MSC313_PINNAME_SR_IO4 "sr_io4" #define MSC313_PINNAME_SR_IO5 "sr_io5" #define MSC313_PINNAME_SR_IO6 "sr_io6" #define MSC313_PINNAME_SR_IO7 "sr_io7" #define MSC313_PINNAME_SR_IO8 "sr_io8" #define MSC313_PINNAME_SR_IO9 "sr_io9" #define MSC313_PINNAME_SR_IO10 "sr_io10" #define MSC313_PINNAME_SR_IO11 "sr_io11" #define MSC313_PINNAME_SR_IO12 "sr_io12" #define MSC313_PINNAME_SR_IO13 "sr_io13" #define MSC313_PINNAME_SR_IO14 "sr_io14" #define MSC313_PINNAME_SR_IO15 "sr_io15" #define MSC313_PINNAME_SR_IO16 "sr_io16" #define MSC313_PINNAME_SR_IO17 "sr_io17" /* pad names for sd, same for all SoCs so far */ #define MSC313_PINNAME_SD_CLK "sd_clk" #define MSC313_PINNAME_SD_CMD "sd_cmd" #define MSC313_PINNAME_SD_D0 "sd_d0" #define MSC313_PINNAME_SD_D1 "sd_d1" #define MSC313_PINNAME_SD_D2 "sd_d2" #define MSC313_PINNAME_SD_D3 "sd_d3" /* pad names for i2c1, same for all SoCs so for */ #define MSC313_PINNAME_I2C1_SCL "i2c1_scl" #define MSC313_PINNAME_I2C1_SCA "i2c1_sda" /* pad names for spi0, same for all SoCs so far */ #define MSC313_PINNAME_SPI0_CZ "spi0_cz" #define MSC313_PINNAME_SPI0_CK "spi0_ck" #define MSC313_PINNAME_SPI0_DI "spi0_di" #define MSC313_PINNAME_SPI0_DO "spi0_do" #define FUART_NAMES \ MSC313_PINNAME_FUART_RX, \ MSC313_PINNAME_FUART_TX, \ MSC313_PINNAME_FUART_CTS, \ MSC313_PINNAME_FUART_RTS #define OFF_FUART_RX 0x50 #define OFF_FUART_TX 0x54 #define OFF_FUART_CTS 0x58 #define OFF_FUART_RTS 0x5c #define FUART_OFFSETS \ OFF_FUART_RX, \ OFF_FUART_TX, \ OFF_FUART_CTS, \ OFF_FUART_RTS #define SR_NAMES \ MSC313_PINNAME_SR_IO2, \ MSC313_PINNAME_SR_IO3, \ MSC313_PINNAME_SR_IO4, \ MSC313_PINNAME_SR_IO5, \ MSC313_PINNAME_SR_IO6, \ MSC313_PINNAME_SR_IO7, \ MSC313_PINNAME_SR_IO8, \ MSC313_PINNAME_SR_IO9, \ MSC313_PINNAME_SR_IO10, \ MSC313_PINNAME_SR_IO11, \ MSC313_PINNAME_SR_IO12, \ MSC313_PINNAME_SR_IO13, \ MSC313_PINNAME_SR_IO14, \ MSC313_PINNAME_SR_IO15, \ MSC313_PINNAME_SR_IO16, \ MSC313_PINNAME_SR_IO17 #define OFF_SR_IO2 0x88 #define OFF_SR_IO3 0x8c #define OFF_SR_IO4 0x90 #define OFF_SR_IO5 0x94 #define OFF_SR_IO6 0x98 #define OFF_SR_IO7 0x9c #define OFF_SR_IO8 0xa0 #define OFF_SR_IO9 0xa4 #define OFF_SR_IO10 0xa8 #define OFF_SR_IO11 0xac #define OFF_SR_IO12 0xb0 #define OFF_SR_IO13 0xb4 #define OFF_SR_IO14 0xb8 #define OFF_SR_IO15 0xbc #define OFF_SR_IO16 0xc0 #define OFF_SR_IO17 0xc4 #define SR_OFFSETS \ OFF_SR_IO2, \ OFF_SR_IO3, \ OFF_SR_IO4, \ OFF_SR_IO5, \ OFF_SR_IO6, \ OFF_SR_IO7, \ OFF_SR_IO8, \ OFF_SR_IO9, \ OFF_SR_IO10, \ OFF_SR_IO11, \ OFF_SR_IO12, \ OFF_SR_IO13, \ OFF_SR_IO14, \ OFF_SR_IO15, \ OFF_SR_IO16, \ OFF_SR_IO17 #define SD_NAMES \ MSC313_PINNAME_SD_CLK, \ MSC313_PINNAME_SD_CMD, \ MSC313_PINNAME_SD_D0, \ MSC313_PINNAME_SD_D1, \ MSC313_PINNAME_SD_D2, \ MSC313_PINNAME_SD_D3 #define OFF_SD_CLK 0x140 #define OFF_SD_CMD 0x144 #define OFF_SD_D0 0x148 #define OFF_SD_D1 0x14c #define OFF_SD_D2 0x150 #define OFF_SD_D3 0x154 #define SD_OFFSETS \ OFF_SD_CLK, \ OFF_SD_CMD, \ OFF_SD_D0, \ OFF_SD_D1, \ OFF_SD_D2, \ OFF_SD_D3 #define I2C1_NAMES \ MSC313_PINNAME_I2C1_SCL, \ MSC313_PINNAME_I2C1_SCA #define OFF_I2C1_SCL 0x188 #define OFF_I2C1_SCA 0x18c #define I2C1_OFFSETS \ OFF_I2C1_SCL, \ OFF_I2C1_SCA #define SPI0_NAMES \ MSC313_PINNAME_SPI0_CZ, \ MSC313_PINNAME_SPI0_CK, \ MSC313_PINNAME_SPI0_DI, \ MSC313_PINNAME_SPI0_DO #define OFF_SPI0_CZ 0x1c0 #define OFF_SPI0_CK 0x1c4 #define OFF_SPI0_DI 0x1c8 #define OFF_SPI0_DO 0x1cc #define SPI0_OFFSETS \ OFF_SPI0_CZ, \ OFF_SPI0_CK, \ OFF_SPI0_DI, \ OFF_SPI0_DO struct msc313_gpio_data { const char * const *names; const unsigned int *offsets; const unsigned int num; }; #define MSC313_GPIO_CHIPDATA(_chip) \ static const struct msc313_gpio_data _chip##_data = { \ .names = _chip##_names, \ .offsets = _chip##_offsets, \ .num = ARRAY_SIZE(_chip##_offsets), \ } #ifdef CONFIG_MACH_INFINITY static const char * const msc313_names[] = { FUART_NAMES, SR_NAMES, SD_NAMES, I2C1_NAMES, SPI0_NAMES, }; static const unsigned int msc313_offsets[] = { FUART_OFFSETS, SR_OFFSETS, SD_OFFSETS, I2C1_OFFSETS, SPI0_OFFSETS, }; MSC313_GPIO_CHIPDATA(msc313); #endif struct msc313_gpio { void __iomem *base; const struct msc313_gpio_data *gpio_data; u8 *saved; }; static void msc313_gpio_set(struct gpio_chip *chip, unsigned int offset, int value) { struct msc313_gpio *gpio = gpiochip_get_data(chip); u8 gpioreg = readb_relaxed(gpio->base + gpio->gpio_data->offsets[offset]); if (value) gpioreg |= MSC313_GPIO_OUT; else gpioreg &= ~MSC313_GPIO_OUT; writeb_relaxed(gpioreg, gpio->base + gpio->gpio_data->offsets[offset]); } static int msc313_gpio_get(struct gpio_chip *chip, unsigned int offset) { struct msc313_gpio *gpio = gpiochip_get_data(chip); return readb_relaxed(gpio->base + gpio->gpio_data->offsets[offset]) & MSC313_GPIO_IN; } static int msc313_gpio_direction_input(struct gpio_chip *chip, unsigned int offset) { struct msc313_gpio *gpio = gpiochip_get_data(chip); u8 gpioreg = readb_relaxed(gpio->base + gpio->gpio_data->offsets[offset]); gpioreg |= MSC313_GPIO_OEN; writeb_relaxed(gpioreg, gpio->base + gpio->gpio_data->offsets[offset]); return 0; } static int msc313_gpio_direction_output(struct gpio_chip *chip, unsigned int offset, int value) { struct msc313_gpio *gpio = gpiochip_get_data(chip); u8 gpioreg = readb_relaxed(gpio->base + gpio->gpio_data->offsets[offset]); gpioreg &= ~MSC313_GPIO_OEN; if (value) gpioreg |= MSC313_GPIO_OUT; else gpioreg &= ~MSC313_GPIO_OUT; writeb_relaxed(gpioreg, gpio->base + gpio->gpio_data->offsets[offset]); return 0; } /* * The interrupt handling happens in the parent interrupt controller, * we don't do anything here. */ static struct irq_chip msc313_gpio_irqchip = { .name = "GPIO", .irq_eoi = irq_chip_eoi_parent, .irq_mask = irq_chip_mask_parent, .irq_unmask = irq_chip_unmask_parent, .irq_set_type = irq_chip_set_type_parent, .irq_set_affinity = irq_chip_set_affinity_parent, }; /* * The parent interrupt controller needs the GIC interrupt type set to GIC_SPI * so we need to provide the fwspec. Essentially gpiochip_populate_parent_fwspec_twocell * that puts GIC_SPI into the first cell. */ static void *msc313_gpio_populate_parent_fwspec(struct gpio_chip *gc, unsigned int parent_hwirq, unsigned int parent_type) { struct irq_fwspec *fwspec; fwspec = kmalloc(sizeof(*fwspec), GFP_KERNEL); if (!fwspec) return NULL; fwspec->fwnode = gc->irq.parent_domain->fwnode; fwspec->param_count = 3; fwspec->param[0] = GIC_SPI; fwspec->param[1] = parent_hwirq; fwspec->param[2] = parent_type; return fwspec; } static int msc313e_gpio_child_to_parent_hwirq(struct gpio_chip *chip, unsigned int child, unsigned int child_type, unsigned int *parent, unsigned int *parent_type) { struct msc313_gpio *priv = gpiochip_get_data(chip); unsigned int offset = priv->gpio_data->offsets[child]; /* * only the spi0 pins have interrupts on the parent * on all of the known chips and so far they are all * mapped to the same place */ if (offset >= OFF_SPI0_CZ && offset <= OFF_SPI0_DO) { *parent_type = child_type; *parent = ((offset - OFF_SPI0_CZ) >> 2) + 28; return 0; } return -EINVAL; } static int msc313_gpio_probe(struct platform_device *pdev) { const struct msc313_gpio_data *match_data; struct msc313_gpio *gpio; struct gpio_chip *gpiochip; struct gpio_irq_chip *gpioirqchip; struct irq_domain *parent_domain; struct device_node *parent_node; struct device *dev = &pdev->dev; int ret; match_data = of_device_get_match_data(dev); if (!match_data) return -EINVAL; parent_node = of_irq_find_parent(dev->of_node); if (!parent_node) return -ENODEV; parent_domain = irq_find_host(parent_node); if (!parent_domain) return -ENODEV; gpio = devm_kzalloc(dev, sizeof(*gpio), GFP_KERNEL); if (!gpio) return -ENOMEM; gpio->gpio_data = match_data; gpio->saved = devm_kcalloc(dev, gpio->gpio_data->num, sizeof(*gpio->saved), GFP_KERNEL); if (!gpio->saved) return -ENOMEM; gpio->base = devm_platform_ioremap_resource(pdev, 0); if (IS_ERR(gpio->base)) return PTR_ERR(gpio->base); platform_set_drvdata(pdev, gpio); gpiochip = devm_kzalloc(dev, sizeof(*gpiochip), GFP_KERNEL); if (!gpiochip) return -ENOMEM; gpiochip->label = DRIVER_NAME; gpiochip->parent = dev; gpiochip->request = gpiochip_generic_request; gpiochip->free = gpiochip_generic_free; gpiochip->direction_input = msc313_gpio_direction_input; gpiochip->direction_output = msc313_gpio_direction_output; gpiochip->get = msc313_gpio_get; gpiochip->set = msc313_gpio_set; gpiochip->base = -1; gpiochip->ngpio = gpio->gpio_data->num; gpiochip->names = gpio->gpio_data->names; gpioirqchip = &gpiochip->irq; gpioirqchip->chip = &msc313_gpio_irqchip; gpioirqchip->fwnode = of_node_to_fwnode(dev->of_node); gpioirqchip->parent_domain = parent_domain; gpioirqchip->child_to_parent_hwirq = msc313e_gpio_child_to_parent_hwirq; gpioirqchip->populate_parent_alloc_arg = msc313_gpio_populate_parent_fwspec; gpioirqchip->handler = handle_bad_irq; gpioirqchip->default_type = IRQ_TYPE_NONE; ret = devm_gpiochip_add_data(dev, gpiochip, gpio); return ret; } static int msc313_gpio_remove(struct platform_device *pdev) { return 0; } static const struct of_device_id msc313_gpio_of_match[] = { #ifdef CONFIG_MACH_INFINITY { .compatible = "mstar,msc313-gpio", .data = &msc313_data, }, #endif { } }; /* * The GPIO controller loses the state of the registers when the * SoC goes into suspend to memory mode so we need to save some * of the register bits before suspending and put it back when resuming */ static int __maybe_unused msc313_gpio_suspend(struct device *dev) { struct msc313_gpio *gpio = dev_get_drvdata(dev); int i; for (i = 0; i < gpio->gpio_data->num; i++) gpio->saved[i] = readb_relaxed(gpio->base + gpio->gpio_data->offsets[i]) & MSC313_GPIO_BITSTOSAVE; return 0; } static int __maybe_unused msc313_gpio_resume(struct device *dev) { struct msc313_gpio *gpio = dev_get_drvdata(dev); int i; for (i = 0; i < gpio->gpio_data->num; i++) writeb_relaxed(gpio->saved[i], gpio->base + gpio->gpio_data->offsets[i]); return 0; } static SIMPLE_DEV_PM_OPS(msc313_gpio_ops, msc313_gpio_suspend, msc313_gpio_resume); static struct platform_driver msc313_gpio_driver = { .driver = { .name = DRIVER_NAME, .of_match_table = msc313_gpio_of_match, .pm = &msc313_gpio_ops, }, .probe = msc313_gpio_probe, .remove = msc313_gpio_remove, }; builtin_platform_driver(msc313_gpio_driver); t.c:130 nfs_get_root() info: redundant null check on name calling kfree() fs/nfs/unlink.c:272 nfs_async_unlink() info: redundant null check on devname_garbage calling kfree() Cc: Trond Myklebust <Trond.Myklebust@netapp.com> Cc: linux-nfs@vger.kernel.org Signed-off-by: Tim Gardner <tim.gardner@canonical.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com> 2012-10-02nfs: include internal.h in getroot.hStanislav Kinsbursky Sparse warning: fs/nfs/nfs4getroot.c:11:5: warning: symbol 'nfs4_get_rootfh' was not declared. Should it be static? Signed-off-by: Stanislav Kinsbursky <skinsbursky@parallels.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com> 2012-07-17NFS: Move the v4 getroot code to nfs4getroot.cBryan Schumaker Signed-off-by: Bryan Schumaker <bjschuma@netapp.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com> 2012-07-14vfs: switch i_dentry/d_alias to hlistAl Viro Signed-off-by: Al Viro <viro@zeniv.linux.org.uk> 2012-05-14NFS: Create a single nfs_get_root()Bryan Schumaker This patch splits out the NFS v4 specific functionality of nfs4_get_root() into its own rpc_op called by the generic client, and leaves nfs4_proc_get_rootfh() as its own stand alone function. This also allows me to change nfs4_remote_mount(), nfs4_xdev_mount() and nfs4_remote_referral_mount() to use the generic client's nfs_get_root() function. Later patches in this series will collapse these functions into one common function, so using the same get_root() function everywhere simplifies future changes. Signed-off-by: Bryan Schumaker <bjschuma@netapp.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com> 2012-05-14NFS: Rename nfs4_proc_get_root()Bryan Schumaker This function is really getting the root filehandle and not the root dentry of the filesystem. I also removed the rpc_ops lookup from nfs4_get_rootfh() under the assumption that if we reach this function then we already know we are using NFS v4. Signed-off-by: Bryan Schumaker <bjschuma@netapp.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com> 2012-03-28Remove all #inclusions of asm/system.hDavid Howells Remove all #inclusions of asm/system.h preparatory to splitting and killing it. Performed with the following command: perl -p -i -e 's!^#\s*include\s*<asm/system[.]h>.*\n!!' `grep -Irl '^#\s*include\s*<asm/system[.]h>' *` Signed-off-by: David Howells <dhowells@redhat.com> 2012-03-20switch open-coded instances of d_make_root() to new helperAl Viro Signed-off-by: Al Viro <viro@zeniv.linux.org.uk> 2011-03-24Merge branch 'nfs-for-2.6.39' into nfs-for-nextTrond Myklebust 2011-03-22nfs4: Fix NULL dereference at d_alloc_and_lookup()Gusev Vitaliy d_alloc_and_lookup() calls i_op->lookup method due to rootfh changes his fsid. During mount i_op of NFS root inode is set to nfs_mountpoint_inode_operations, if rpc_ops->getroot() and rpc_ops->getattr() return different fsid. After that nfs_follow_remote_path() raised oops: BUG: unable to handle kernel NULL pointer dereference at (null) IP: [< (null)>] (null) stack trace: d_alloc_and_lookup+0x4c/0x74 do_lookup+0x1e3/0x280 link_path_walk+0x12e/0xab0 nfs4_remote_get_sb+0x56/0x2c0 [nfs] path_walk+0x67/0xe0 vfs_path_lookup+0x8e/0x100 nfs_follow_remote_path+0x16f/0x3e0 [nfs] nfs4_try_mount+0x6f/0xd0 [nfs] nfs_get_sb+0x269/0x400 [nfs] vfs_kern_mount+0x8a/0x1f0 do_kern_mount+0x52/0x130 do_mount+0x20a/0x260 sys_mount+0x90/0xe0 system_call_fastpath+0x16/0x1b So just refresh fsid, as RFC3530 doesn't specify behavior in case of rootfh changes fsid. Signed-off-by: Vitaliy Gusev <gusev.vitaliy@nexenta.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com> 2011-03-16nfs: store devname at disconnected NFS rootsAl Viro part 2: make sure that disconnected roots have corresponding mnt_devname values stashed into them. Have nfs*_get_root() stuff a copy of devname into ->d_fsdata of the found root, provided that it is disconnected. Have ->d_release() free it when dentry goes away. Have the places where NFS uses ->d_fsdata for sillyrename (and that can *never* happen to a disconnected root - dentry will be attached to its parent) free old devname copies if they find those. Signed-off-by: Al Viro <viro@zeniv.linux.org.uk> 2011-03-16nfs: propagate devname to nfs{,4}_get_root()Al Viro step 1 of ->mnt_devname fixes: make sure we have the value of devname available in ..._get_root(). Signed-off-by: Al Viro <viro@zeniv.linux.org.uk> 2011-01-12switch nfs to ->s_d_opAl Viro Signed-off-by: Al Viro <viro@zeniv.linux.org.uk> 2011-01-07fs: dcache per-inode inode alias lockingNick Piggin dcache_inode_lock can be replaced with per-inode locking. Use existing inode->i_lock for this. This is slightly non-trivial because we sometimes need to find the inode from the dentry, which requires d_inode to be stabilised (either with refcount or d_lock). Signed-off-by: Nick Piggin <npiggin@kernel.dk> 2011-01-07fs: dcache reduce branches in lookup pathNick Piggin Reduce some branches and memory accesses in dcache lookup by adding dentry flags to indicate common d_ops are set, rather than having to check them. This saves a pointer memory access (dentry->d_op) in common path lookup situations, and saves another pointer load and branch in cases where we have d_op but not the particular operation. Patched with: git grep -E '[.>]([[:space:]])*d_op([[:space:]])*=' | xargs sed -e 's/\([^\t ]*\)->d_op = \(.*\);/d_set_d_op(\1, \2);/' -e 's/\([^\t ]*\)\.d_op = \(.*\);/d_set_d_op(\&\1, \2);/' -i Signed-off-by: Nick Piggin <npiggin@kernel.dk> 2011-01-07fs: dcache remove dcache_lockNick Piggin dcache_lock no longer protects anything. remove it. Signed-off-by: Nick Piggin <npiggin@kernel.dk> 2011-01-07fs: scale inode alias listNick Piggin Add a new lock, dcache_inode_lock, to protect the inode's i_dentry list from concurrent modification. d_alias is also protected by d_lock. Signed-off-by: Nick Piggin <npiggin@kernel.dk> 2010-10-25new helper: ihold()Al Viro Clones an existing reference to inode; caller must already hold one. Signed-off-by: Al Viro <viro@zeniv.linux.org.uk> 2010-06-22nfs4 use mandatory attribute file type in nfs4_get_rootAndy Adamson S_ISDIR(fsinfo.fattr->mode) checks the file type rather than the mode bits, so we should be checking for the NFS_ATTR_FATTR_TYPE fattr property. Signed-off-by: Andy Adamson <andros@netapp.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com> Cc: stable@kernel.org 2010-05-14NFSv4: Reduce stack footprint of nfs4_get_root()Trond Myklebust Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com> 2010-05-14NFSv4: Eliminate nfs4_path_walk()Trond Myklebust All we really want is the ability to retrieve the root file handle. We no longer need the ability to walk down the path, since that is now done in nfs_follow_remote_path(). Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com> 2009-07-08headers: mnt_namespace.h reduxAlexey Dobriyan Fix various silly problems wrt mnt_namespace.h: - exit_mnt_ns() isn't used, remove it - done that, sched.h and nsproxy.h inclusions aren't needed - mount.h inclusion was need for vfsmount_lock, but no longer - remove mnt_namespace.h inclusion from files which don't use anything from mnt_namespace.h Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> 2009-03-11NFS: Fix the type of struct nfs_fattr->modeTrond Myklebust There is no point in using anything other than umode_t, since we copy the content pretty much directly into inode->i_mode. Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>