diff options
48 files changed, 1119 insertions, 741 deletions
diff --git a/Documentation/console/console.txt b/Documentation/console/console.txt index 926cf1b5e63e..f93810d599ad 100644 --- a/Documentation/console/console.txt +++ b/Documentation/console/console.txt @@ -12,20 +12,20 @@ The second type has to be explicitly loaded and unloaded. This will be called any time with each driver sharing the console with other drivers including the system driver. However, modular drivers cannot take over the console that is currently occupied by another modular driver. (Exception: Drivers that -call take_over_console() will succeed in the takeover regardless of the type +call do_take_over_console() will succeed in the takeover regardless of the type of driver occupying the consoles.) They can only take over the console that is occupied by the system driver. In the same token, if the modular driver is released by the console, the system driver will take over. Modular drivers, from the programmer's point of view, has to call: - take_over_console() - load and bind driver to console layer - give_up_console() - unbind and unload driver + do_take_over_console() - load and bind driver to console layer + give_up_console() - unload driver, it will only work if driver is fully unbond In newer kernels, the following are also available: - register_con_driver() - unregister_con_driver() + do_register_con_driver() + do_unregister_con_driver() If sysfs is enabled, the contents of /sys/class/vtconsole can be examined. This shows the console backends currently registered by the @@ -94,12 +94,12 @@ for more details). Notes for developers: ===================== -take_over_console() is now broken up into: +do_take_over_console() is now broken up into: - register_con_driver() - bind_con_driver() - private function + do_register_con_driver() + do_bind_con_driver() - private function -give_up_console() is a wrapper to unregister_con_driver(), and a driver must +give_up_console() is a wrapper to do_unregister_con_driver(), and a driver must be fully unbound for this call to succeed. con_is_bound() will check if the driver is bound or not. @@ -109,10 +109,10 @@ Guidelines for console driver writers: In order for binding to and unbinding from the console to properly work, console drivers must follow these guidelines: -1. All drivers, except system drivers, must call either register_con_driver() - or take_over_console(). register_con_driver() will just add the driver to +1. All drivers, except system drivers, must call either do_register_con_driver() + or do_take_over_console(). do_register_con_driver() will just add the driver to the console's internal list. It won't take over the - console. take_over_console(), as it name implies, will also take over (or + console. do_take_over_console(), as it name implies, will also take over (or bind to) the console. 2. All resources allocated during con->con_init() must be released in @@ -128,10 +128,10 @@ console drivers must follow these guidelines: rebind the driver to the console arrives. 4. Upon exit of the driver, ensure that the driver is totally unbound. If the - condition is satisfied, then the driver must call unregister_con_driver() + condition is satisfied, then the driver must call do_unregister_con_driver() or give_up_console(). -5. unregister_con_driver() can also be called on conditions which make it +5. do_unregister_con_driver() can also be called on conditions which make it impossible for the driver to service console requests. This can happen with the framebuffer console that suddenly lost all of its drivers. diff --git a/Documentation/devicetree/bindings/tty/serial/fsl-imx-uart.txt b/Documentation/devicetree/bindings/tty/serial/fsl-imx-uart.txt index b462d0c54823..c662eb36be29 100644 --- a/Documentation/devicetree/bindings/tty/serial/fsl-imx-uart.txt +++ b/Documentation/devicetree/bindings/tty/serial/fsl-imx-uart.txt @@ -8,6 +8,8 @@ Required properties: Optional properties: - fsl,uart-has-rtscts : Indicate the uart has rts and cts - fsl,irda-mode : Indicate the uart supports irda mode +- fsl,dte-mode : Indicate the uart works in DTE mode. The uart works + is DCE mode by default. Example: @@ -16,4 +18,5 @@ serial@73fbc000 { reg = <0x73fbc000 0x4000>; interrupts = <31>; fsl,uart-has-rtscts; + fsl,dte-mode; }; diff --git a/Documentation/serial/00-INDEX b/Documentation/serial/00-INDEX index f7b0c7dc25ef..1f1b22fbd739 100644 --- a/Documentation/serial/00-INDEX +++ b/Documentation/serial/00-INDEX @@ -16,8 +16,6 @@ serial-rs485.txt - info about RS485 structures and support in the kernel. specialix.txt - info on hardware/driver for specialix IO8+ multiport serial card. -stallion.txt - - info on using the Stallion multiport serial driver. sx.txt - info on the Specialix SX/SI multiport serial driver. tty.txt diff --git a/Documentation/serial/stallion.txt b/Documentation/serial/stallion.txt deleted file mode 100644 index 4d798c0cb5cb..000000000000 --- a/Documentation/serial/stallion.txt +++ /dev/null @@ -1,392 +0,0 @@ -* NOTE - This is an unmaintained driver. Lantronix, which bought Stallion -technologies, is not active in driver maintenance, and they have no information -on when or if they will have a 2.6 driver. - -James Nelson <james4765@gmail.com> - 12-12-2004 - -Stallion Multiport Serial Driver Readme ---------------------------------------- - -Copyright (C) 1994-1999, Stallion Technologies. - -Version: 5.5.1 -Date: 28MAR99 - - - -1. INTRODUCTION - -There are two drivers that work with the different families of Stallion -multiport serial boards. One is for the Stallion smart boards - that is -EasyIO, EasyConnection 8/32 and EasyConnection 8/64-PCI, the other for -the true Stallion intelligent multiport boards - EasyConnection 8/64 -(ISA, EISA), EasyConnection/RA-PCI, ONboard and Brumby. - -If you are using any of the Stallion intelligent multiport boards (Brumby, -ONboard, EasyConnection 8/64 (ISA, EISA), EasyConnection/RA-PCI) with -Linux you will need to get the driver utility package. This contains a -firmware loader and the firmware images necessary to make the devices operate. - -The Stallion Technologies ftp site, ftp.stallion.com, will always have -the latest version of the driver utility package. - -ftp://ftp.stallion.com/drivers/ata5/Linux/ata-linux-550.tar.gz - -As of the printing of this document the latest version of the driver -utility package is 5.5.0. If a later version is now available then you -should use the latest version. - -If you are using the EasyIO, EasyConnection 8/32 or EasyConnection 8/64-PCI -boards then you don't need this package, although it does have a serial stats -display program. - -If you require DIP switch settings, or EISA configuration files, or any -other information related to Stallion boards then have a look at Stallion's -web pages at http://www.stallion.com. - - - -2. INSTALLATION - -The drivers can be used as loadable modules or compiled into the kernel. -You can choose which when doing a "config" on the kernel. - -All ISA, and EISA boards that you want to use need to be configured into -the driver(s). All PCI boards will be automatically detected when you load -the driver - so they do not need to be entered into the driver(s) -configuration structure. Note that kernel PCI support is required to use PCI -boards. - -There are two methods of configuring ISA and EISA boards into the drivers. -If using the driver as a loadable module then the simplest method is to pass -the driver configuration as module arguments. The other method is to modify -the driver source to add configuration lines for each board in use. - -If you have pre-built Stallion driver modules then the module argument -configuration method should be used. A lot of Linux distributions come with -pre-built driver modules in /lib/modules/X.Y.Z/misc for the kernel in use. -That makes things pretty simple to get going. - - -2.1 MODULE DRIVER CONFIGURATION: - -The simplest configuration for modules is to use the module load arguments -to configure any ISA or EISA boards. PCI boards are automatically -detected, so do not need any additional configuration at all. - -If using EasyIO, EasyConnection 8/32 ISA, or EasyConnection 8/63-PCI -boards then use the "stallion" driver module, Otherwise if you are using -an EasyConnection 8/64 ISA or EISA, EasyConnection/RA-PCI, ONboard, -Brumby or original Stallion board then use the "istallion" driver module. - -Typically to load up the smart board driver use: - - modprobe stallion - -This will load the EasyIO and EasyConnection 8/32 driver. It will output a -message to say that it loaded and print the driver version number. It will -also print out whether it found the configured boards or not. These messages -may not appear on the console, but typically are always logged to -/var/adm/messages or /var/log/syslog files - depending on how the klogd and -syslogd daemons are setup on your system. - -To load the intelligent board driver use: - - modprobe istallion - -It will output similar messages to the smart board driver. - -If not using an auto-detectable board type (that is a PCI board) then you -will also need to supply command line arguments to the modprobe command -when loading the driver. The general form of the configuration argument is - - board?=<name>[,<ioaddr>[,<addr>][,<irq>]] - -where: - - board? -- specifies the arbitrary board number of this board, - can be in the range 0 to 3. - - name -- textual name of this board. The board name is the common - board name, or any "shortened" version of that. The board - type number may also be used here. - - ioaddr -- specifies the I/O address of this board. This argument is - optional, but should generally be specified. - - addr -- optional second address argument. Some board types require - a second I/O address, some require a memory address. The - exact meaning of this argument depends on the board type. - - irq -- optional IRQ line used by this board. - -Up to 4 board configuration arguments can be specified on the load line. -Here is some examples: - - modprobe stallion board0=easyio,0x2a0,5 - -This configures an EasyIO board as board 0 at I/O address 0x2a0 and IRQ 5. - - modprobe istallion board3=ec8/64,0x2c0,0xcc000 - -This configures an EasyConnection 8/64 ISA as board 3 at I/O address 0x2c0 at -memory address 0xcc000. - - modprobe stallion board1=ec8/32-at,0x2a0,0x280,10 - -This configures an EasyConnection 8/32 ISA board at primary I/O address 0x2a0, -secondary address 0x280 and IRQ 10. - -You will probably want to enter this module load and configuration information -into your system startup scripts so that the drivers are loaded and configured -on each system boot. Typically configuration files are put in the -/etc/modprobe.d/ directory. - - -2.2 STATIC DRIVER CONFIGURATION: - -For static driver configuration you need to modify the driver source code. -Entering ISA and EISA boards into the driver(s) configuration structure -involves editing the driver(s) source file. It's pretty easy if you follow -the instructions below. Both drivers can support up to 4 boards. The smart -card driver (the stallion.c driver) supports any combination of EasyIO and -EasyConnection 8/32 boards (up to a total of 4). The intelligent driver -supports any combination of ONboards, Brumbys, Stallions and EasyConnection -8/64 (ISA and EISA) boards (up to a total of 4). - -To set up the driver(s) for the boards that you want to use you need to -edit the appropriate driver file and add configuration entries. - -If using EasyIO or EasyConnection 8/32 ISA boards, - In drivers/char/stallion.c: - - find the definition of the stl_brdconf array (of structures) - near the top of the file - - modify this to match the boards you are going to install - (the comments before this structure should help) - - save and exit - -If using ONboard, Brumby, Stallion or EasyConnection 8/64 (ISA or EISA) -boards, - In drivers/char/istallion.c: - - find the definition of the stli_brdconf array (of structures) - near the top of the file - - modify this to match the boards you are going to install - (the comments before this structure should help) - - save and exit - -Once you have set up the board configurations then you are ready to build -the kernel or modules. - -When the new kernel is booted, or the loadable module loaded then the -driver will emit some kernel trace messages about whether the configured -boards were detected or not. Depending on how your system logger is set -up these may come out on the console, or just be logged to -/var/adm/messages or /var/log/syslog. You should check the messages to -confirm that all is well. - - -2.3 SHARING INTERRUPTS - -It is possible to share interrupts between multiple EasyIO and -EasyConnection 8/32 boards in an EISA system. To do this you must be using -static driver configuration, modifying the driver source code to add driver -configuration. Then a couple of extra things are required: - -1. When entering the board resources into the stallion.c file you need to - mark the boards as using level triggered interrupts. Do this by replacing - the "0" entry at field position 6 (the last field) in the board - configuration structure with a "1". (This is the structure that defines - the board type, I/O locations, etc. for each board). All boards that are - sharing an interrupt must be set this way, and each board should have the - same interrupt number specified here as well. Now build the module or - kernel as you would normally. - -2. When physically installing the boards into the system you must enter - the system EISA configuration utility. You will need to install the EISA - configuration files for *all* the EasyIO and EasyConnection 8/32 boards - that are sharing interrupts. The Stallion EasyIO and EasyConnection 8/32 - EISA configuration files required are supplied by Stallion Technologies - on the EASY Utilities floppy diskette (usually supplied in the box with - the board when purchased. If not, you can pick it up from Stallion's FTP - site, ftp.stallion.com). You will need to edit the board resources to - choose level triggered interrupts, and make sure to set each board's - interrupt to the same IRQ number. - -You must complete both the above steps for this to work. When you reboot -or load the driver your EasyIO and EasyConnection 8/32 boards will be -sharing interrupts. - - -2.4 USING HIGH SHARED MEMORY - -The EasyConnection 8/64-EI, ONboard and Stallion boards are capable of -using shared memory addresses above the usual 640K - 1Mb range. The ONboard -ISA and the Stallion boards can be programmed to use memory addresses up to -16Mb (the ISA bus addressing limit), and the EasyConnection 8/64-EI and -ONboard/E can be programmed for memory addresses up to 4Gb (the EISA bus -addressing limit). - -The higher than 1Mb memory addresses are fully supported by this driver. -Just enter the address as you normally would for a lower than 1Mb address -(in the driver's board configuration structure). - - - -2.5 TROUBLE SHOOTING - -If a board is not found by the driver but is actually in the system then the -most likely problem is that the I/O address is wrong. Change the module load -argument for the loadable module form. Or change it in the driver stallion.c -or istallion.c configuration structure and rebuild the kernel or modules, or -change it on the board. - -On EasyIO and EasyConnection 8/32 boards the IRQ is software programmable, so -if there is a conflict you may need to change the IRQ used for a board. There -are no interrupts to worry about for ONboard, Brumby or EasyConnection 8/64 -(ISA and EISA) boards. The memory region on EasyConnection 8/64 and -ONboard boards is software programmable, but not on the Brumby boards. - - - -3. USING THE DRIVERS - -3.1 INTELLIGENT DRIVER OPERATION - -The intelligent boards also need to have their "firmware" code downloaded -to them. This is done via a user level application supplied in the driver -utility package called "stlload". Compile this program wherever you dropped -the package files, by typing "make". In its simplest form you can then type - - ./stlload -i cdk.sys - -in this directory and that will download board 0 (assuming board 0 is an -EasyConnection 8/64 or EasyConnection/RA board). To download to an -ONboard, Brumby or Stallion do: - - ./stlload -i 2681.sys - -Normally you would want all boards to be downloaded as part of the standard -system startup. To achieve this, add one of the lines above into the -/etc/rc.d/rc.S or /etc/rc.d/rc.serial file. To download each board just add -the "-b <brd-number>" option to the line. You will need to download code for -every board. You should probably move the stlload program into a system -directory, such as /usr/sbin. Also, the default location of the cdk.sys image -file in the stlload down-loader is /usr/lib/stallion. Create that directory -and put the cdk.sys and 2681.sys files in it. (It's a convenient place to put -them anyway). As an example your /etc/rc.d/rc.S file might have the -following lines added to it (if you had 3 boards): - - /usr/sbin/stlload -b 0 -i /usr/lib/stallion/cdk.sys - /usr/sbin/stlload -b 1 -i /usr/lib/stallion/2681.sys - /usr/sbin/stlload -b 2 -i /usr/lib/stallion/2681.sys - -The image files cdk.sys and 2681.sys are specific to the board types. The -cdk.sys will only function correctly on an EasyConnection 8/64 board. Similarly -the 2681.sys image fill only operate on ONboard, Brumby and Stallion boards. -If you load the wrong image file into a board it will fail to start up, and -of course the ports will not be operational! - -If you are using the modularized version of the driver you might want to put -the modprobe calls in the startup script as well (before the download lines -obviously). - - -3.2 USING THE SERIAL PORTS - -Once the driver is installed you will need to setup some device nodes to -access the serial ports. The simplest method is to use the /dev/MAKEDEV program. -It will automatically create device entries for Stallion boards. This will -create the normal serial port devices as /dev/ttyE# where# is the port number -starting from 0. A bank of 64 minor device numbers is allocated to each board, -so the first port on the second board is port 64,etc. A set of callout type -devices may also be created. They are created as the devices /dev/cue# where # -is the same as for the ttyE devices. - -For the most part the Stallion driver tries to emulate the standard PC system -COM ports and the standard Linux serial driver. The idea is that you should -be able to use Stallion board ports and COM ports interchangeably without -modifying anything but the device name. Anything that doesn't work like that -should be considered a bug in this driver! - -If you look at the driver code you will notice that it is fairly closely -based on the Linux serial driver (linux/drivers/char/serial.c). This is -intentional, obviously this is the easiest way to emulate its behavior! - -Since this driver tries to emulate the standard serial ports as much as -possible, most system utilities should work as they do for the standard -COM ports. Most importantly "stty" works as expected and "setserial" can -also be used (excepting the ability to auto-configure the I/O and IRQ -addresses of boards). Higher baud rates are supported in the usual fashion -through setserial or using the CBAUDEX extensions. Note that the EasyIO and -EasyConnection (all types) support at least 57600 and 115200 baud. The newer -EasyConnection XP modules and new EasyIO boards support 230400 and 460800 -baud as well. The older boards including ONboard and Brumby support a -maximum baud rate of 38400. - -If you are unfamiliar with how to use serial ports, then get the Serial-HOWTO -by Greg Hankins. It will explain everything you need to know! - - - -4. NOTES - -You can use both drivers at once if you have a mix of board types installed -in a system. However to do this you will need to change the major numbers -used by one of the drivers. Currently both drivers use major numbers 24, 25 -and 28 for their devices. Change one driver to use some other major numbers, -and then modify the mkdevnods script to make device nodes based on those new -major numbers. For example, you could change the istallion.c driver to use -major numbers 60, 61 and 62. You will also need to create device nodes with -different names for the ports, for example ttyF# and cuf#. - -The original Stallion board is no longer supported by Stallion Technologies. -Although it is known to work with the istallion driver. - -Finding a free physical memory address range can be a problem. The older -boards like the Stallion and ONboard need large areas (64K or even 128K), so -they can be very difficult to get into a system. If you have 16 Mb of RAM -then you have no choice but to put them somewhere in the 640K -> 1Mb range. -ONboards require 64K, so typically 0xd0000 is good, or 0xe0000 on some -systems. If you have an original Stallion board, "V4.0" or Rev.O, then you -need a 64K memory address space, so again 0xd0000 and 0xe0000 are good. -Older Stallion boards are a much bigger problem. They need 128K of address -space and must be on a 128K boundary. If you don't have a VGA card then -0xc0000 might be usable - there is really no other place you can put them -below 1Mb. - -Both the ONboard and old Stallion boards can use higher memory addresses as -well, but you must have less than 16Mb of RAM to be able to use them. Usual -high memory addresses used include 0xec0000 and 0xf00000. - -The Brumby boards only require 16Kb of address space, so you can usually -squeeze them in somewhere. Common addresses are 0xc8000, 0xcc000, or in -the 0xd0000 range. EasyConnection 8/64 boards are even better, they only -require 4Kb of address space, again usually 0xc8000, 0xcc000 or 0xd0000 -are good. - -If you are using an EasyConnection 8/64-EI or ONboard/E then usually the -0xd0000 or 0xe0000 ranges are the best options below 1Mb. If neither of -them can be used then the high memory support to use the really high address -ranges is the best option. Typically the 2Gb range is convenient for them, -and gets them well out of the way. - -The ports of the EasyIO-8M board do not have DCD or DTR signals. So these -ports cannot be used as real modem devices. Generally, when using these -ports you should only use the cueX devices. - -The driver utility package contains a couple of very useful programs. One -is a serial port statistics collection and display program - very handy -for solving serial port problems. The other is an extended option setting -program that works with the intelligent boards. - - - -5. DISCLAIMER - -The information contained in this document is believed to be accurate and -reliable. However, no responsibility is assumed by Stallion Technologies -Pty. Ltd. for its use, nor any infringements of patents or other rights -of third parties resulting from its use. Stallion Technologies reserves -the right to modify the design of its products and will endeavour to change -the information in manuals and accompanying documentation accordingly. - diff --git a/MAINTAINERS b/MAINTAINERS index 250dc970c62d..8ed60b8ff76f 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -4577,7 +4577,7 @@ F: fs/jbd2/ F: include/linux/jbd2.h JSM Neo PCI based serial card -M: Lucas Tavares <lucaskt@linux.vnet.ibm.com> +M: Thadeu Lima de Souza Cascardo <cascardo@linux.vnet.ibm.com> L: linux-serial@vger.kernel.org S: Maintained F: drivers/tty/serial/jsm/ diff --git a/arch/alpha/kernel/console.c b/arch/alpha/kernel/console.c index da711e37fc97..6a61deed4a85 100644 --- a/arch/alpha/kernel/console.c +++ b/arch/alpha/kernel/console.c @@ -61,7 +61,9 @@ locate_and_init_vga(void *(*sel_func)(void *, void *)) /* Set the VGA hose and init the new console. */ pci_vga_hose = hose; - take_over_console(&vga_con, 0, MAX_NR_CONSOLES-1, 1); + console_lock(); + do_take_over_console(&vga_con, 0, MAX_NR_CONSOLES-1, 1); + console_unlock(); } void __init diff --git a/arch/alpha/kernel/process.c b/arch/alpha/kernel/process.c index ab80a80d38a2..f2360a74e5d5 100644 --- a/arch/alpha/kernel/process.c +++ b/arch/alpha/kernel/process.c @@ -117,7 +117,9 @@ common_shutdown_1(void *generic_ptr) if (in_interrupt()) irq_exit(); /* This has the effect of resetting the VGA video origin. */ - take_over_console(&dummy_con, 0, MAX_NR_CONSOLES-1, 1); + console_lock(); + do_take_over_console(&dummy_con, 0, MAX_NR_CONSOLES-1, 1); + console_unlock(); #endif pci_restore_srm_config(); set_hae(srm_hae); diff --git a/arch/mips/pci/pci-bcm1480.c b/arch/mips/pci/pci-bcm1480.c index e2e69e1e9fe1..44dd5aa2e36f 100644 --- a/arch/mips/pci/pci-bcm1480.c +++ b/arch/mips/pci/pci-bcm1480.c @@ -257,7 +257,9 @@ static int __init bcm1480_pcibios_init(void) register_pci_controller(&bcm1480_controller); #ifdef CONFIG_VGA_CONSOLE - take_over_console(&vga_con, 0, MAX_NR_CONSOLES-1, 1); + console_lock(); + do_take_over_console(&vga_con, 0, MAX_NR_CONSOLES-1, 1); + console_unlock(); #endif return 0; } diff --git a/arch/mips/pci/pci-sb1250.c b/arch/mips/pci/pci-sb1250.c index cdefcc4cb8d4..fc634aeda4a5 100644 --- a/arch/mips/pci/pci-sb1250.c +++ b/arch/mips/pci/pci-sb1250.c @@ -283,7 +283,9 @@ static int __init sb1250_pcibios_init(void) register_pci_controller(&sb1250_controller); #ifdef CONFIG_VGA_CONSOLE - take_over_console(&vga_con, 0, MAX_NR_CONSOLES - 1, 1); + console_lock(); + do_take_over_console(&vga_con, 0, MAX_NR_CONSOLES - 1, 1); + console_unlock(); #endif return 0; } diff --git a/arch/parisc/kernel/setup.c b/arch/parisc/kernel/setup.c index 1e95b2000ce8..7349a3fedfc7 100644 --- a/arch/parisc/kernel/setup.c +++ b/arch/parisc/kernel/setup.c @@ -156,7 +156,7 @@ void __init setup_arch(char **cmdline_p) #endif #if defined(CONFIG_VT) && defined(CONFIG_DUMMY_CONSOLE) - conswitchp = &dummy_con; /* we use take_over_console() later ! */ + conswitchp = &dummy_con; /* we use do_take_over_console() later ! */ #endif } diff --git a/arch/powerpc/include/asm/mpc52xx_psc.h b/arch/powerpc/include/asm/mpc52xx_psc.h index 2966df604221..d0ece257d310 100644 --- a/arch/powerpc/include/asm/mpc52xx_psc.h +++ b/arch/powerpc/include/asm/mpc52xx_psc.h @@ -299,4 +299,53 @@ struct mpc512x_psc_fifo { #define rxdata_32 rxdata.rxdata_32 }; +struct mpc5125_psc { + u8 mr1; /* PSC + 0x00 */ + u8 reserved0[3]; + u8 mr2; /* PSC + 0x04 */ + u8 reserved1[3]; + struct { + u16 status; /* PSC + 0x08 */ + u8 reserved2[2]; + u8 clock_select; /* PSC + 0x0c */ + u8 reserved3[3]; + } sr_csr; + u8 command; /* PSC + 0x10 */ + u8 reserved4[3]; + union { /* PSC + 0x14 */ + u8 buffer_8; + u16 buffer_16; + u32 buffer_32; + } buffer; + struct { + u8 ipcr; /* PSC + 0x18 */ + u8 reserved5[3]; + u8 acr; /* PSC + 0x1c */ + u8 reserved6[3]; + } ipcr_acr; + struct { + u16 isr; /* PSC + 0x20 */ + u8 reserved7[2]; + u16 imr; /* PSC + 0x24 */ + u8 reserved8[2]; + } isr_imr; + u8 ctur; /* PSC + 0x28 */ + u8 reserved9[3]; + u8 ctlr; /* PSC + 0x2c */ + u8 reserved10[3]; + u32 ccr; /* PSC + 0x30 */ + u32 ac97slots; /* PSC + 0x34 */ + u32 ac97cmd; /* PSC + 0x38 */ + u32 ac97data; /* PSC + 0x3c */ + u8 reserved11[4]; + u8 ip; /* PSC + 0x44 */ + u8 reserved12[3]; + u8 op1; /* PSC + 0x48 */ + u8 reserved13[3]; + u8 op0; /* PSC + 0x4c */ + u8 reserved14[3]; + u32 sicr; /* PSC + 0x50 */ + u8 reserved15[4]; /* make eq. sizeof(mpc52xx_psc) */ +}; + #endif /* __ASM_MPC52xx_PSC_H__ */ diff --git a/drivers/char/Kconfig b/drivers/char/Kconfig index 3bb6fa3930be..14219972c745 100644 --- a/drivers/char/Kconfig +++ b/drivers/char/Kconfig @@ -15,18 +15,6 @@ config DEVKMEM kind of kernel debugging operations. When in doubt, say "N". -config STALDRV - bool "Stallion multiport serial support" - depends on SERIAL_NONSTANDARD - help - Stallion cards give you many serial ports. You would need something - like this to connect more than two modems to your Linux box, for - instance in order to become a dial-in server. If you say Y here, - you will be asked for your specific card model in the next - questions. Make sure to read <file:Documentation/serial/stallion.txt> - in this case. If you have never heard about all this, it's safe to - say N. - config SGI_SNSC bool "SGI Altix system controller communication support" depends on (IA64_SGI_SN2 || IA64_GENERIC) diff --git a/drivers/tty/Makefile b/drivers/tty/Makefile index 6b78399bc7c9..58ad1c05b7f8 100644 --- a/drivers/tty/Makefile +++ b/drivers/tty/Makefile @@ -1,5 +1,5 @@ obj-$(CONFIG_TTY) += tty_io.o n_tty.o tty_ioctl.o tty_ldisc.o \ - tty_buffer.o tty_port.o tty_mutex.o + tty_buffer.o tty_port.o tty_mutex.o tty_ldsem.o obj-$(CONFIG_LEGACY_PTYS) += pty.o obj-$(CONFIG_UNIX98_PTYS) += pty.o obj-$(CONFIG_AUDIT) += tty_audit.o diff --git a/drivers/tty/hvc/hvc_iucv.c b/drivers/tty/hvc/hvc_iucv.c index b6f7d52f7c35..9d47f50c2755 100644 --- a/drivers/tty/hvc/hvc_iucv.c +++ b/drivers/tty/hvc/hvc_iucv.c @@ -1328,7 +1328,7 @@ out_error: */ static int __init hvc_iucv_config(char *val) { - return strict_strtoul(val, 10, &hvc_iucv_devices); + return kstrtoul(val, 10, &hvc_iucv_devices); } diff --git a/drivers/tty/n_tty.c b/drivers/tty/n_tty.c index 6c7fe90ad72d..cdcdb0ea061a 100644 --- a/drivers/tty/n_tty.c +++ b/drivers/tty/n_tty.c @@ -647,8 +647,7 @@ static void process_echoes(struct tty_struct *tty) if (no_space_left) break; } else { - if (O_OPOST(tty) && - !(test_bit(TTY_HW_COOK_OUT, &tty->flags))) { + if (O_OPOST(tty)) { int retval = do_output_char(c, tty, space); if (retval < 0) break; @@ -1516,12 +1515,7 @@ static void n_tty_set_termios(struct tty_struct *tty, struct ktermios *old) wake_up_interruptible(&tty->read_wait); ldata->icanon = (L_ICANON(tty) != 0); - if (test_bit(TTY_HW_COOK_IN, &tty->flags)) { - ldata->raw = 1; - ldata->real_raw = 1; - n_tty_set_room(tty); - return; - } + if (I_ISTRIP(tty) || I_IUCLC(tty) || I_IGNCR(tty) || I_ICRNL(tty) || I_INLCR(tty) || L_ICANON(tty) || I_IXON(tty) || L_ISIG(tty) || L_ECHO(tty) || @@ -2045,7 +2039,7 @@ static ssize_t n_tty_write(struct tty_struct *tty, struct file *file, retval = -EIO; break; } - if (O_OPOST(tty) && !(test_bit(TTY_HW_COOK_OUT, &tty->flags))) { + if (O_OPOST(tty)) { while (nr > 0) { ssize_t num = process_output_block(tty, b, nr); if (num < 0) { diff --git a/drivers/tty/serial/8250/Kconfig b/drivers/tty/serial/8250/Kconfig index 80fe91e64a52..a1ba94d64885 100644 --- a/drivers/tty/serial/8250/Kconfig +++ b/drivers/tty/serial/8250/Kconfig @@ -12,9 +12,8 @@ config SERIAL_8250 here are those that are setting up dedicated Ethernet WWW/FTP servers, or users that have one of the various bus mice instead of a serial mouse and don't intend to use their machine's standard serial - port for anything. (Note that the Cyclades and Stallion multi - serial port drivers do not need this driver built in for them to - work.) + port for anything. (Note that the Cyclades multi serial port driver + does not need this driver built in for it to work.) To compile this driver as a module, choose M here: the module will be called 8250. diff --git a/drivers/tty/serial/Kconfig b/drivers/tty/serial/Kconfig index 7e7006fd404e..95e66acca165 100644 --- a/drivers/tty/serial/Kconfig +++ b/drivers/tty/serial/Kconfig @@ -551,7 +551,7 @@ config BFIN_UART3_CTSRTS Enable hardware flow control in the driver. config SERIAL_IMX - bool "IMX serial port support" + tristate "IMX serial port support" depends on ARCH_MXC select SERIAL_CORE select RATIONAL @@ -561,22 +561,21 @@ config SERIAL_IMX config SERIAL_IMX_CONSOLE bool "Console on IMX serial port" - depends on SERIAL_IMX + depends on SERIAL_IMX=y select SERIAL_CORE_CONSOLE help - If you have enabled the serial port on the Motorola IMX + If you have enabled the serial port on the Freescale IMX CPU you can make it the console by answering Y to this option. Even if you say Y here, the currently visible virtual console (/dev/tty0) will still be used as the system console by default, but you can alter that using a kernel command line option such as - "console=ttySA0". (Try "man bootparam" or see the documentation of - your boot loader (lilo or loadlin) about how to pass options to the - kernel at boot time.) + "console=ttymxc0". (Try "man bootparam" or see the documentation of + your bootloader about how to pass options to the kernel at boot time.) config SERIAL_UARTLITE tristate "Xilinx uartlite serial port support" - depends on PPC32 || MICROBLAZE || MFD_TIMBERDALE + depends on PPC32 || MICROBLAZE || MFD_TIMBERDALE || ARCH_ZYNQ select SERIAL_CORE help Say Y here if you want to use the Xilinx uartlite serial controller. diff --git a/drivers/tty/serial/altera_uart.c b/drivers/tty/serial/altera_uart.c index 13471dd95793..1d46966e2a65 100644 --- a/drivers/tty/serial/altera_uart.c +++ b/drivers/tty/serial/altera_uart.c @@ -604,7 +604,6 @@ static int altera_uart_remove(struct platform_device *pdev) if (port) { uart_remove_one_port(&altera_uart_driver, port); - platform_set_drvdata(pdev, NULL); port->mapbase = 0; } diff --git a/drivers/tty/serial/amba-pl011.c b/drivers/tty/serial/amba-pl011.c index e2774f9ecd59..ad41319d1d9b 100644 --- a/drivers/tty/serial/amba-pl011.c +++ b/drivers/tty/serial/amba-pl011.c @@ -79,13 +79,12 @@ struct vendor_data { bool dma_threshold; bool cts_event_workaround; - unsigned int (*get_fifosize)(unsigned int periphid); + unsigned int (*get_fifosize)(struct amba_device *dev); }; -static unsigned int get_fifosize_arm(unsigned int periphid) +static unsigned int get_fifosize_arm(struct amba_device *dev) { - unsigned int rev = (periphid >> 20) & 0xf; - return rev < 3 ? 16 : 32; + return amba_rev(dev) < 3 ? 16 : 32; } static struct vendor_data vendor_arm = { @@ -98,7 +97,7 @@ static struct vendor_data vendor_arm = { .get_fifosize = get_fifosize_arm, }; -static unsigned int get_fifosize_st(unsigned int periphid) +static unsigned int get_fifosize_st(struct amba_device *dev) { return 64; } @@ -2157,7 +2156,7 @@ static int pl011_probe(struct amba_device *dev, const struct amba_id *id) uap->lcrh_rx = vendor->lcrh_rx; uap->lcrh_tx = vendor->lcrh_tx; uap->old_cr = 0; - uap->fifosize = vendor->get_fifosize(dev->periphid); + uap->fifosize = vendor->get_fifosize(dev); uap->port.dev = &dev->dev; uap->port.mapbase = dev->res.start; uap->port.membase = base; diff --git a/drivers/tty/serial/cpm_uart/cpm_uart_core.c b/drivers/tty/serial/cpm_uart/cpm_uart_core.c index 97f4e1858649..f7672cae5321 100644 --- a/drivers/tty/serial/cpm_uart/cpm_uart_core.c +++ b/drivers/tty/serial/cpm_uart/cpm_uart_core.c @@ -1384,7 +1384,7 @@ static int cpm_uart_probe(struct platform_device *ofdev) if (index >= UART_NR) return -ENODEV; - dev_set_drvdata(&ofdev->dev, pinfo); + platform_set_drvdata(ofdev, pinfo); /* initialize the device pointer for the port */ pinfo->port.dev = &ofdev->dev; @@ -1398,7 +1398,7 @@ static int cpm_uart_probe(struct platform_device *ofdev) static int cpm_uart_remove(struct platform_device *ofdev) { - struct uart_cpm_port *pinfo = dev_get_drvdata(&ofdev->dev); + struct uart_cpm_port *pinfo = platform_get_drvdata(ofdev); return uart_remove_one_port(&cpm_reg, &pinfo->port); } diff --git a/drivers/tty/serial/imx.c b/drivers/tty/serial/imx.c index 8cdfbd365892..7a761f7c9781 100644 --- a/drivers/tty/serial/imx.c +++ b/drivers/tty/serial/imx.c @@ -201,6 +201,7 @@ struct imx_port { unsigned int old_status; int txirq, rxirq, rtsirq; unsigned int have_rtscts:1; + unsigned int dte_mode:1; unsigned int use_irda:1; unsigned int irda_inv_rx:1; unsigned int irda_inv_tx:1; @@ -271,6 +272,7 @@ static inline int is_imx21_uart(struct imx_port *sport) /* * Save and restore functions for UCR1, UCR2 and UCR3 registers */ +#if defined(CONFIG_CONSOLE_POLL) || defined(CONFIG_SERIAL_IMX_CONSOLE) static void imx_port_ucrs_save(struct uart_port *port, struct imx_port_ucrs *ucr) { @@ -288,6 +290,7 @@ static void imx_port_ucrs_restore(struct uart_port *port, writel(ucr->ucr2, port->membase + UCR2); writel(ucr->ucr3, port->membase + UCR3); } +#endif /* * Handle any change of modem status signal since we were last called. @@ -449,6 +452,13 @@ static void imx_start_tx(struct uart_port *port) temp &= ~(UCR1_RRDYEN); writel(temp, sport->port.membase + UCR1); } + /* Clear any pending ORE flag before enabling interrupt */ + temp = readl(sport->port.membase + USR2); + writel(temp | USR2_ORE, sport->port.membase + USR2); + + temp = readl(sport->port.membase + UCR4); + temp |= UCR4_OREN; + writel(temp, sport->port.membase + UCR4); temp = readl(sport->port.membase + UCR1); writel(temp | UCR1_TXMPTYEN, sport->port.membase + UCR1); @@ -582,6 +592,7 @@ static irqreturn_t imx_int(int irq, void *dev_id) { struct imx_port *sport = dev_id; unsigned int sts; + unsigned int sts2; sts = readl(sport->port.membase + USR1); @@ -598,6 +609,13 @@ static irqreturn_t imx_int(int irq, void *dev_id) if (sts & USR1_AWAKE) writel(USR1_AWAKE, sport->port.membase + USR1); + sts2 = readl(sport->port.membase + USR2); + if (sts2 & USR2_ORE) { + dev_err(sport->port.dev, "Rx FIFO overrun\n"); + sport->port.icount.overrun++; + writel(sts2 | USR2_ORE, sport->port.membase + USR2); + } + return IRQ_HANDLED; } @@ -684,6 +702,14 @@ static int imx_startup(struct uart_port *port) int retval; unsigned long flags, temp; + retval = clk_prepare_enable(sport->clk_per); + if (retval) + goto error_out1; + + retval = clk_prepare_enable(sport->clk_ipg); + if (retval) + goto error_out1; + imx_setup_ufcr(sport, 0); /* disable the DREN bit (Data Ready interrupt enable) before @@ -871,6 +897,9 @@ static void imx_shutdown(struct uart_port *port) writel(temp, sport->port.membase + UCR1); spin_unlock_irqrestore(&sport->port.lock, flags); + + clk_disable_unprepare(sport->clk_per); + clk_disable_unprepare(sport->clk_ipg); } static void @@ -1007,6 +1036,8 @@ imx_set_termios(struct uart_port *port, struct ktermios *termios, ufcr = readl(sport->port.membase + UFCR); ufcr = (ufcr & (~UFCR_RFDIV)) | UFCR_RFDIV_REG(div); + if (sport->dte_mode) + ufcr |= UFCR_DCEDTE; writel(ufcr, sport->port.membase + UFCR); writel(num, sport->port.membase + UBIR); @@ -1431,6 +1462,9 @@ static int serial_imx_probe_dt(struct imx_port *sport, if (of_get_property(np, "fsl,irda-mode", NULL)) sport->use_irda = 1; + if (of_get_property(np, "fsl,dte-mode", NULL)) + sport->dte_mode = 1; + sport->devdata = of_id->data; return 0; @@ -1544,6 +1578,9 @@ static int serial_imx_probe(struct platform_device *pdev) goto deinit; platform_set_drvdata(pdev, sport); + clk_disable_unprepare(sport->clk_per); + clk_disable_unprepare(sport->clk_ipg); + return 0; deinit: if (pdata && pdata->exit) @@ -1565,9 +1602,6 @@ static int serial_imx_remove(struct platform_device *pdev) uart_remove_one_port(&imx_reg, &sport->port); - clk_disable_unprepare(sport->clk_per); - clk_disable_unprepare(sport->clk_ipg); - if (pdata && pdata->exit) pdata->exit(pdev); diff --git a/drivers/tty/serial/mpc52xx_uart.c b/drivers/tty/serial/mpc52xx_uart.c index f51b280f3bf2..9ba194590a80 100644 --- a/drivers/tty/serial/mpc52xx_uart.c +++ b/drivers/tty/serial/mpc52xx_uart.c @@ -84,16 +84,6 @@ static void mpc52xx_uart_of_enumerate(void); static irqreturn_t mpc52xx_uart_int(int irq, void *dev_id); static irqreturn_t mpc5xxx_uart_process_int(struct uart_port *port); - -/* Simple macro to test if a port is console or not. This one is taken - * for serial_core.c and maybe should be moved to serial_core.h ? */ -#ifdef CONFIG_SERIAL_CORE_CONSOLE -#define uart_console(port) \ - ((port)->cons && (port)->cons->index == (port)->line) -#else -#define uart_console(port) (0) -#endif - /* ======================================================================== */ /* PSC fifo operations for isolating differences between 52xx and 512x */ /* ======================================================================== */ @@ -122,6 +112,15 @@ struct psc_ops { void (*fifoc_uninit)(void); void (*get_irq)(struct uart_port *, struct device_node *); irqreturn_t (*handle_irq)(struct uart_port *port); + u16 (*get_status)(struct uart_port *port); + u8 (*get_ipcr)(struct uart_port *port); + void (*command)(struct uart_port *port, u8 cmd); + void (*set_mode)(struct uart_port *port, u8 mr1, u8 mr2); + void (*set_rts)(struct uart_port *port, int state); + void (*enable_ms)(struct uart_port *port); + void (*set_sicr)(struct uart_port *port, u32 val); + void (*set_imr)(struct uart_port *port, u16 val); + u8 (*get_mr1)(struct uart_port *port); }; /* setting the prescaler and divisor reg is common for all chips */ @@ -134,6 +133,65 @@ static inline void mpc52xx_set_divisor(struct mpc52xx_psc __iomem *psc, out_8(&psc->ctlr, divisor & 0xff); } +static u16 mpc52xx_psc_get_status(struct uart_port *port) +{ + return in_be16(&PSC(port)->mpc52xx_psc_status); +} + +static u8 mpc52xx_psc_get_ipcr(struct uart_port *port) +{ + return in_8(&PSC(port)->mpc52xx_psc_ipcr); +} + +static void mpc52xx_psc_command(struct uart_port *port, u8 cmd) +{ + out_8(&PSC(port)->command, cmd); +} + +static void mpc52xx_psc_set_mode(struct uart_port *port, u8 mr1, u8 mr2) +{ + out_8(&PSC(port)->command, MPC52xx_PSC_SEL_MODE_REG_1); + out_8(&PSC(port)->mode, mr1); + out_8(&PSC(port)->mode, mr2); +} + +static void mpc52xx_psc_set_rts(struct uart_port *port, int state) +{ + if (state) + out_8(&PSC(port)->op1, MPC52xx_PSC_OP_RTS); + else + out_8(&PSC(port)->op0, MPC52xx_PSC_OP_RTS); +} + +static void mpc52xx_psc_enable_ms(struct uart_port *port) +{ + struct mpc52xx_psc __iomem *psc = PSC(port); + + /* clear D_*-bits by reading them */ + in_8(&psc->mpc52xx_psc_ipcr); + /* enable CTS and DCD as IPC interrupts */ + out_8(&psc->mpc52xx_psc_acr, MPC52xx_PSC_IEC_CTS | MPC52xx_PSC_IEC_DCD); + + port->read_status_mask |= MPC52xx_PSC_IMR_IPC; + out_be16(&psc->mpc52xx_psc_imr, port->read_status_mask); +} + +static void mpc52xx_psc_set_sicr(struct uart_port *port, u32 val) +{ + out_be32(&PSC(port)->sicr, val); +} + +static void mpc52xx_psc_set_imr(struct uart_port *port, u16 val) +{ + out_be16(&PSC(port)->mpc52xx_psc_imr, val); +} + +static u8 mpc52xx_psc_get_mr1(struct uart_port *port) +{ + out_8(&PSC(port)->command, MPC52xx_PSC_SEL_MODE_REG_1); + return in_8(&PSC(port)->mode); +} + #ifdef CONFIG_PPC_MPC52xx #define FIFO_52xx(port) ((struct mpc52xx_psc_fifo __iomem *)(PSC(port)+1)) static void mpc52xx_psc_fifo_init(struct uart_port *port) @@ -304,6 +362,15 @@ static struct psc_ops mpc52xx_psc_ops = { .set_baudrate = mpc5200_psc_set_baudrate, .get_irq = mpc52xx_psc_get_irq, .handle_irq = mpc52xx_psc_handle_irq, + .get_status = mpc52xx_psc_get_status, + .get_ipcr = mpc52xx_psc_get_ipcr, + .command = mpc52xx_psc_command, + .set_mode = mpc52xx_psc_set_mode, + .set_rts = mpc52xx_psc_set_rts, + .enable_ms = mpc52xx_psc_enable_ms, + .set_sicr = mpc52xx_psc_set_sicr, + .set_imr = mpc52xx_psc_set_imr, + .get_mr1 = mpc52xx_psc_get_mr1, }; static struct psc_ops mpc5200b_psc_ops = { @@ -325,6 +392,15 @@ static struct psc_ops mpc5200b_psc_ops = { .set_baudrate = mpc5200b_psc_set_baudrate, .get_irq = mpc52xx_psc_get_irq, .handle_irq = mpc52xx_psc_handle_irq, + .get_status = mpc52xx_psc_get_status, + .get_ipcr = mpc52xx_psc_get_ipcr, + .command = mpc52xx_psc_command, + .set_mode = mpc52xx_psc_set_mode, + .set_rts = mpc52xx_psc_set_rts, + .enable_ms = mpc52xx_psc_enable_ms, + .set_sicr = mpc52xx_psc_set_sicr, + .set_imr = mpc52xx_psc_set_imr, + .get_mr1 = mpc52xx_psc_get_mr1, }; #endif /* CONFIG_MPC52xx */ @@ -572,6 +648,246 @@ static void mpc512x_psc_get_irq(struct uart_port *port, struct device_node *np) port->irqflags = IRQF_SHARED; port->irq = psc_fifoc_irq; } +#endif + +#ifdef CONFIG_PPC_MPC512x + +#define PSC_5125(port) ((struct mpc5125_psc __iomem *)((port)->membase)) +#define FIFO_5125(port) ((struct mpc512x_psc_fifo __iomem *)(PSC_5125(port)+1)) + +static void mpc5125_psc_fifo_init(struct uart_port *port) +{ + /* /32 prescaler */ + out_8(&PSC_5125(port)->mpc52xx_psc_clock_select, 0xdd); + + out_be32(&FIFO_5125(port)->txcmd, MPC512x_PSC_FIFO_RESET_SLICE); + out_be32(&FIFO_5125(port)->txcmd, MPC512x_PSC_FIFO_ENABLE_SLICE); + out_be32(&FIFO_5125(port)->txalarm, 1); + out_be32(&FIFO_5125(port)->tximr, 0); + + out_be32(&FIFO_5125(port)->rxcmd, MPC512x_PSC_FIFO_RESET_SLICE); + out_be32(&FIFO_5125(port)->rxcmd, MPC512x_PSC_FIFO_ENABLE_SLICE); + out_be32(&FIFO_5125(port)->rxalarm, 1); + out_be32(&FIFO_5125(port)->rximr, 0); + + out_be32(&FIFO_5125(port)->tximr, MPC512x_PSC_FIFO_ALARM); + out_be32(&FIFO_5125(port)->rximr, MPC512x_PSC_FIFO_ALARM); +} + +static int mpc5125_psc_raw_rx_rdy(struct uart_port *port) +{ + return !(in_be32(&FIFO_5125(port)->rxsr) & MPC512x_PSC_FIFO_EMPTY); +} + +static int mpc5125_psc_raw_tx_rdy(struct uart_port *port) +{ + return !(in_be32(&FIFO_5125(port)->txsr) & MPC512x_PSC_FIFO_FULL); +} + +static int mpc5125_psc_rx_rdy(struct uart_port *port) +{ + return in_be32(&FIFO_5125(port)->rxsr) & + in_be32(&FIFO_5125(port)->rximr) & MPC512x_PSC_FIFO_ALARM; +} + +static int mpc5125_psc_tx_rdy(struct uart_port *port) +{ + return in_be32(&FIFO_5125(port)->txsr) & + in_be32(&FIFO_5125(port)->tximr) & MPC512x_PSC_FIFO_ALARM; +} + +static int mpc5125_psc_tx_empty(struct uart_port *port) +{ + return in_be32(&FIFO_5125(port)->txsr) & MPC512x_PSC_FIFO_EMPTY; +} + +static void mpc5125_psc_stop_rx(struct uart_port *port) +{ + unsigned long rx_fifo_imr; + + rx_fifo_imr = in_be32(&FIFO_5125(port)->rximr); + rx_fifo_imr &= ~MPC512x_PSC_FIFO_ALARM; + out_be32(&FIFO_5125(port)->rximr, rx_fifo_imr); +} + +static void mpc5125_psc_start_tx(struct uart_port *port) +{ + unsigned long tx_fifo_imr; + + tx_fifo_imr = in_be32(&FIFO_5125(port)->tximr); + tx_fifo_imr |= MPC512x_PSC_FIFO_ALARM; + out_be32(&FIFO_5125(port)->tximr, tx_fifo_imr); +} + +static void mpc5125_psc_stop_tx(struct uart_port *port) +{ + unsigned long tx_fifo_imr; + + tx_fifo_imr = in_be32(&FIFO_5125(port)->tximr); + tx_fifo_imr &= ~MPC512x_PSC_FIFO_ALARM; + out_be32(&FIFO_5125(port)->tximr, tx_fifo_imr); +} + +static void mpc5125_psc_rx_clr_irq(struct uart_port *port) +{ + out_be32(&FIFO_5125(port)->rxisr, in_be32(&FIFO_5125(port)->rxisr)); +} + +static void mpc5125_psc_tx_clr_irq(struct uart_port *port) +{ + out_be32(&FIFO_5125(port)->txisr, in_be32(&FIFO_5125(port)->txisr)); +} + +static void mpc5125_psc_write_char(struct uart_port *port, unsigned char c) +{ + out_8(&FIFO_5125(port)->txdata_8, c); +} + +static unsigned char mpc5125_psc_read_char(struct uart_port *port) +{ + return in_8(&FIFO_5125(port)->rxdata_8); +} + +static void mpc5125_psc_cw_disable_ints(struct uart_port *port) +{ + port->read_status_mask = + in_be32(&FIFO_5125(port)->tximr) << 16 | + in_be32(&FIFO_5125(port)->rximr); + out_be32(&FIFO_5125(port)->tximr, 0); + out_be32(&FIFO_5125(port)->rximr, 0); +} + +static void mpc5125_psc_cw_restore_ints(struct uart_port *port) +{ + out_be32(&FIFO_5125(port)->tximr, + (port->read_status_mask >> 16) & 0x7f); + out_be32(&FIFO_5125(port)->rximr, port->read_status_mask & 0x7f); +} + +static inline void mpc5125_set_divisor(struct mpc5125_psc __iomem *psc, + u8 prescaler, unsigned int divisor) +{ + /* select prescaler */ + out_8(&psc->mpc52xx_psc_clock_select, prescaler); + out_8(&psc->ctur, divisor >> 8); + out_8(&psc->ctlr, divisor & 0xff); +} + +static unsigned int mpc5125_psc_set_baudrate(struct uart_port *port, + struct ktermios *new, + struct ktermios *old) +{ + unsigned int baud; + unsigned int divisor; + + /* + * Calculate with a /16 prescaler here. + */ + + /* uartclk contains the ips freq */ + baud = uart_get_baud_rate(port, new, old, + port->uartclk / (16 * 0xffff) + 1, + port->uartclk / 16); + divisor = (port->uartclk + 8 * baud) / (16 * baud); + + /* enable the /16 prescaler and set the divisor */ + mpc5125_set_divisor(PSC_5125(port), 0xdd, divisor); + return baud; +} + +/* + * MPC5125 have compatible PSC FIFO Controller. + * Special init not needed. + */ +static u16 mpc5125_psc_get_status(struct uart_port *port) +{ + return in_be16(&PSC_5125(port)->mpc52xx_psc_status); +} + +static u8 mpc5125_psc_get_ipcr(struct uart_port *port) +{ + return in_8(&PSC_5125(port)->mpc52xx_psc_ipcr); +} + +static void mpc5125_psc_command(struct uart_port *port, u8 cmd) +{ + out_8(&PSC_5125(port)->command, cmd); +} + +static void mpc5125_psc_set_mode(struct uart_port *port, u8 mr1, u8 mr2) +{ + out_8(&PSC_5125(port)->mr1, mr1); + out_8(&PSC_5125(port)->mr2, mr2); +} + +static void mpc5125_psc_set_rts(struct uart_port *port, int state) +{ + if (state & TIOCM_RTS) + out_8(&PSC_5125(port)->op1, MPC52xx_PSC_OP_RTS); + else + out_8(&PSC_5125(port)->op0, MPC52xx_PSC_OP_RTS); +} + +static void mpc5125_psc_enable_ms(struct uart_port *port) +{ + struct mpc5125_psc __iomem *psc = PSC_5125(port); + + /* clear D_*-bits by reading them */ + in_8(&psc->mpc52xx_psc_ipcr); + /* enable CTS and DCD as IPC interrupts */ + out_8(&psc->mpc52xx_psc_acr, MPC52xx_PSC_IEC_CTS | MPC52xx_PSC_IEC_DCD); + + port->read_status_mask |= MPC52xx_PSC_IMR_IPC; + out_be16(&psc->mpc52xx_psc_imr, port->read_status_mask); +} + +static void mpc5125_psc_set_sicr(struct uart_port *port, u32 val) +{ + out_be32(&PSC_5125(port)->sicr, val); +} + +static void mpc5125_psc_set_imr(struct uart_port *port, u16 val) +{ + out_be16(&PSC_5125(port)->mpc52xx_psc_imr, val); +} + +static u8 mpc5125_psc_get_mr1(struct uart_port *port) +{ + return in_8(&PSC_5125(port)->mr1); +} + +static struct psc_ops mpc5125_psc_ops = { + .fifo_init = mpc5125_psc_fifo_init, + .raw_rx_rdy = mpc5125_psc_raw_rx_rdy, + .raw_tx_rdy = mpc5125_psc_raw_tx_rdy, + .rx_rdy = mpc5125_psc_rx_rdy, + .tx_rdy = mpc5125_psc_tx_rdy, + .tx_empty = mpc5125_psc_tx_empty, + .stop_rx = mpc5125_psc_stop_rx, + .start_tx = mpc5125_psc_start_tx, + .stop_tx = mpc5125_psc_stop_tx, + .rx_clr_irq = mpc5125_psc_rx_clr_irq, + .tx_clr_irq = mpc5125_psc_tx_clr_irq, + .write_char = mpc5125_psc_write_char, + .read_char = mpc5125_psc_read_char, + .cw_disable_ints = mpc5125_psc_cw_disable_ints, + .cw_restore_ints = mpc5125_psc_cw_restore_ints, + .set_baudrate = mpc5125_psc_set_baudrate, + .clock = mpc512x_psc_clock, + .fifoc_init = mpc512x_psc_fifoc_init, + .fifoc_uninit = mpc512x_psc_fifoc_uninit, + .get_irq = mpc512x_psc_get_irq, + .handle_irq = mpc512x_psc_handle_irq, + .get_status = mpc5125_psc_get_status, + .get_ipcr = mpc5125_psc_get_ipcr, + .command = mpc5125_psc_command, + .set_mode = mpc5125_psc_set_mode, + .set_rts = mpc5125_psc_set_rts, + .enable_ms = mpc5125_psc_enable_ms, + .set_sicr = mpc5125_psc_set_sicr, + .set_imr = mpc5125_psc_set_imr, + .get_mr1 = mpc5125_psc_get_mr1, +}; static struct psc_ops mpc512x_psc_ops = { .fifo_init = mpc512x_psc_fifo_init, @@ -595,8 +911,18 @@ static struct psc_ops mpc512x_psc_ops = { .fifoc_uninit = mpc512x_psc_fifoc_uninit, .get_irq = mpc512x_psc_get_irq, .handle_irq = mpc512x_psc_handle_irq, + .get_status = mpc52xx_psc_get_status, + .get_ipcr = mpc52xx_psc_get_ipcr, + .command = mpc52xx_psc_command, + .set_mode = mpc52xx_psc_set_mode, + .set_rts = mpc52xx_psc_set_rts, + .enable_ms = mpc52xx_psc_enable_ms, + .set_sicr = mpc52xx_psc_set_sicr, + .set_imr = mpc52xx_psc_set_imr, + .get_mr1 = mpc52xx_psc_get_mr1, }; -#endif +#endif /* CONFIG_PPC_MPC512x */ + static const struct psc_ops *psc_ops; @@ -613,17 +939,14 @@ mpc52xx_uart_tx_empty(struct uart_port *port) static void mpc52xx_uart_set_mctrl(struct uart_port *port, unsigned int mctrl) { - if (mctrl & TIOCM_RTS) - out_8(&PSC(port)->op1, MPC52xx_PSC_OP_RTS); - else - out_8(&PSC(port)->op0, MPC52xx_PSC_OP_RTS); + psc_ops->set_rts(port, mctrl & TIOCM_RTS); } static unsigned int mpc52xx_uart_get_mctrl(struct uart_port *port) { unsigned int ret = TIOCM_DSR; - u8 status = in_8(&PSC(port)->mpc52xx_psc_ipcr); + u8 status = psc_ops->get_ipcr(port); if (!(status & MPC52xx_PSC_CTS)) ret |= TIOCM_CTS; @@ -673,15 +996,7 @@ mpc52xx_uart_stop_rx(struct uart_port *port) static void mpc52xx_uart_enable_ms(struct uart_port *port) { - struct mpc52xx_psc __iomem *psc = PSC(port); - - /* clear D_*-bits by reading them */ - in_8(&psc->mpc52xx_psc_ipcr); - /* enable CTS and DCD as IPC interrupts */ - out_8(&psc->mpc52xx_psc_acr, MPC52xx_PSC_IEC_CTS | MPC52xx_PSC_IEC_DCD); - - port->read_status_mask |= MPC52xx_PSC_IMR_IPC; - out_be16(&psc->mpc52xx_psc_imr, port->read_status_mask); + psc_ops->enable_ms(port); } static void @@ -691,9 +1006,9 @@ mpc52xx_uart_break_ctl(struct uart_port *port, int ctl) spin_lock_irqsave(&port->lock, flags); if (ctl == -1) - out_8(&PSC(port)->command, MPC52xx_PSC_START_BRK); + psc_ops->command(port, MPC52xx_PSC_START_BRK); else - out_8(&PSC(port)->command, MPC52xx_PSC_STOP_BRK); + psc_ops->command(port, MPC52xx_PSC_STOP_BRK); spin_unlock_irqrestore(&port->lock, flags); } @@ -701,7 +1016,6 @@ mpc52xx_uart_break_ctl(struct uart_port *port, int ctl) static int mpc52xx_uart_startup(struct uart_port *port) { - struct mpc52xx_psc __iomem *psc = PSC(port); int ret; if (psc_ops->clock) { @@ -717,15 +1031,15 @@ mpc52xx_uart_startup(struct uart_port *port) return ret; /* Reset/activate the port, clear and enable interrupts */ - out_8(&psc->command, MPC52xx_PSC_RST_RX); - out_8(&psc->command, MPC52xx_PSC_RST_TX); + psc_ops->command(port, MPC52xx_PSC_RST_RX); + psc_ops->command(port, MPC52xx_PSC_RST_TX); - out_be32(&psc->sicr, 0); /* UART mode DCD ignored */ + psc_ops->set_sicr(port, 0); /* UART mode DCD ignored */ psc_ops->fifo_init(port); - out_8(&psc->command, MPC52xx_PSC_TX_ENABLE); - out_8(&psc->command, MPC52xx_PSC_RX_ENABLE); + psc_ops->command(port, MPC52xx_PSC_TX_ENABLE); + psc_ops->command(port, MPC52xx_PSC_RX_ENABLE); return 0; } @@ -733,15 +1047,13 @@ mpc52xx_uart_startup(struct uart_port *port) static void mpc52xx_uart_shutdown(struct uart_port *port) { - struct mpc52xx_psc __iomem *psc = PSC(port); - /* Shut down the port. Leave TX active if on a console port */ - out_8(&psc->command, MPC52xx_PSC_RST_RX); + psc_ops->command(port, MPC52xx_PSC_RST_RX); if (!uart_console(port)) - out_8(&psc->command, MPC52xx_PSC_RST_TX); + psc_ops->command(port, MPC52xx_PSC_RST_TX); port->read_status_mask = 0; - out_be16(&psc->mpc52xx_psc_imr, port->read_status_mask); + psc_ops->set_imr(port, port->read_status_mask); if (psc_ops->clock) psc_ops->clock(port, 0); @@ -754,7 +1066,6 @@ static void mpc52xx_uart_set_termios(struct uart_port *port, struct ktermios *new, struct ktermios *old) { - struct mpc52xx_psc __iomem *psc = PSC(port); unsigned long flags; unsigned char mr1, mr2; unsigned int j; @@ -818,13 +1129,11 @@ mpc52xx_uart_set_termios(struct uart_port *port, struct ktermios *new, "Some chars may have been lost.\n"); /* Reset the TX & RX */ - out_8(&psc->command, MPC52xx_PSC_RST_RX); - out_8(&psc->command, MPC52xx_PSC_RST_TX); + psc_ops->command(port, MPC52xx_PSC_RST_RX); + psc_ops->command(port, MPC52xx_PSC_RST_TX); /* Send new mode settings */ - out_8(&psc->command, MPC52xx_PSC_SEL_MODE_REG_1); - out_8(&psc->mode, mr1); - out_8(&psc->mode, mr2); + psc_ops->set_mode(port, mr1, mr2); baud = psc_ops->set_baudrate(port, new, old); /* Update the per-port timeout */ @@ -834,8 +1143,8 @@ mpc52xx_uart_set_termios(struct uart_port *port, struct ktermios *new, mpc52xx_uart_enable_ms(port); /* Reenable TX & RX */ - out_8(&psc->command, MPC52xx_PSC_TX_ENABLE); - out_8(&psc->command, MPC52xx_PSC_RX_ENABLE); + psc_ops->command(port, MPC52xx_PSC_TX_ENABLE); + psc_ops->command(port, MPC52xx_PSC_RX_ENABLE); /* We're all set, release the lock */ spin_unlock_irqrestore(&port->lock, flags); @@ -963,7 +1272,7 @@ mpc52xx_uart_int_rx_chars(struct uart_port *port) flag = TTY_NORMAL; port->icount.rx++; - status = in_be16(&PSC(port)->mpc52xx_psc_status); + status = psc_ops->get_status(port); if (status & (MPC52xx_PSC_SR_PE | MPC52xx_PSC_SR_FE | @@ -983,7 +1292,7 @@ mpc52xx_uart_int_rx_chars(struct uart_port *port) } /* Clear error condition */ - out_8(&PSC(port)->command, MPC52xx_PSC_RST_ERR_STAT); + psc_ops->command(port, MPC52xx_PSC_RST_ERR_STAT); } tty_insert_flip_char(tport, ch, flag); @@ -1066,7 +1375,7 @@ mpc5xxx_uart_process_int(struct uart_port *port) if (psc_ops->tx_rdy(port)) keepgoing |= mpc52xx_uart_int_tx_chars(port); - status = in_8(&PSC(port)->mpc52xx_psc_ipcr); + status = psc_ops->get_ipcr(port); if (status & MPC52xx_PSC_D_DCD) uart_handle_dcd_change(port, !(status & MPC52xx_PSC_DCD)); @@ -1107,14 +1416,12 @@ static void __init mpc52xx_console_get_options(struct uart_port *port, int *baud, int *parity, int *bits, int *flow) { - struct mpc52xx_psc __iomem *psc = PSC(port); unsigned char mr1; pr_debug("mpc52xx_console_get_options(port=%p)\n", port); /* Read the mode registers */ - out_8(&psc->command, MPC52xx_PSC_SEL_MODE_REG_1); - mr1 = in_8(&psc->mode); + mr1 = psc_ops->get_mr1(port); /* CT{U,L}R are write-only ! */ *baud = CONFIG_SERIAL_MPC52xx_CONSOLE_BAUD; @@ -1304,6 +1611,7 @@ static struct of_device_id mpc52xx_uart_of_match[] = { #endif #ifdef CONFIG_PPC_MPC512x { .compatible = "fsl,mpc5121-psc-uart", .data = &mpc512x_psc_ops, }, + { .compatible = "fsl,mpc5125-psc-uart", .data = &mpc5125_psc_ops, }, #endif {}, }; @@ -1372,15 +1680,14 @@ static int mpc52xx_uart_of_probe(struct platform_device *op) if (ret) return ret; - dev_set_drvdata(&op->dev, (void *)port); + platform_set_drvdata(op, (void *)port); return 0; } static int mpc52xx_uart_of_remove(struct platform_device *op) { - struct uart_port *port = dev_get_drvdata(&op->dev); - dev_set_drvdata(&op->dev, NULL); + struct uart_port *port = platform_get_drvdata(op); if (port) uart_remove_one_port(&mpc52xx_uart_driver, port); @@ -1392,7 +1699,7 @@ mpc52xx_uart_of_remove(struct platform_device *op) static int mpc52xx_uart_of_suspend(struct platform_device *op, pm_message_t state) { - struct uart_port *port = (struct uart_port *) dev_get_drvdata(&op->dev); + struct uart_port *port = (struct uart_port *) platform_get_drvdata(op); if (port) uart_suspend_port(&mpc52xx_uart_driver, port); @@ -1403,7 +1710,7 @@ mpc52xx_uart_of_suspend(struct platform_device *op, pm_message_t state) static int mpc52xx_uart_of_resume(struct platform_device *op) { - struct uart_port *port = (struct uart_port *) dev_get_drvdata(&op->dev); + struct uart_port *port = (struct uart_port *) platform_get_drvdata(op); if (port) uart_resume_port(&mpc52xx_uart_driver, port); diff --git a/drivers/tty/serial/of_serial.c b/drivers/tty/serial/of_serial.c index 39c7ea4cb14f..2caf9c6f6149 100644 --- a/drivers/tty/serial/of_serial.c +++ b/drivers/tty/serial/of_serial.c @@ -204,7 +204,7 @@ static int of_platform_serial_probe(struct platform_device *ofdev) info->type = port_type; info->line = ret; - dev_set_drvdata(&ofdev->dev, info); + platform_set_drvdata(ofdev, info); return 0; out: kfree(info); @@ -217,7 +217,7 @@ out: */ static int of_platform_serial_remove(struct platform_device *ofdev) { - struct of_serial_info *info = dev_get_drvdata(&ofdev->dev); + struct of_serial_info *info = platform_get_drvdata(ofdev); switch (info->type) { #ifdef CONFIG_SERIAL_8250 case PORT_8250 ... PORT_MAX_8250: diff --git a/drivers/tty/serial/omap-serial.c b/drivers/tty/serial/omap-serial.c index f0b9f6b52b32..156b5aaed95b 100644 --- a/drivers/tty/serial/omap-serial.c +++ b/drivers/tty/serial/omap-serial.c @@ -161,6 +161,7 @@ struct uart_omap_port { u32 calc_latency; struct work_struct qos_work; struct pinctrl *pins; + bool is_suspending; }; #define to_uart_omap_port(p) ((container_of((p), struct uart_omap_port, port))) @@ -1289,6 +1290,22 @@ static struct uart_driver serial_omap_reg = { }; #ifdef CONFIG_PM_SLEEP +static int serial_omap_prepare(struct device *dev) +{ + struct uart_omap_port *up = dev_get_drvdata(dev); + + up->is_suspending = true; + + return 0; +} + +static void serial_omap_complete(struct device *dev) +{ + struct uart_omap_port *up = dev_get_drvdata(dev); + + up->is_suspending = false; +} + static int serial_omap_suspend(struct device *dev) { struct uart_omap_port *up = dev_get_drvdata(dev); @@ -1307,7 +1324,10 @@ static int serial_omap_resume(struct device *dev) return 0; } -#endif +#else +#define serial_omap_prepare NULL +#define serial_omap_complete NULL +#endif /* CONFIG_PM_SLEEP */ static void omap_serial_fill_features_erratas(struct uart_omap_port *up) { @@ -1596,6 +1616,16 @@ static int serial_omap_runtime_suspend(struct device *dev) if (!up) return -EINVAL; + /* + * When using 'no_console_suspend', the console UART must not be + * suspended. Since driver suspend is managed by runtime suspend, + * preventing runtime suspend (by returning error) will keep device + * active during suspend. + */ + if (up->is_suspending && !console_suspend_enabled && + uart_console(&up->port)) + return -EBUSY; + if (!pdata) return 0; @@ -1643,6 +1673,8 @@ static const struct dev_pm_ops serial_omap_dev_pm_ops = { SET_SYSTEM_SLEEP_PM_OPS(serial_omap_suspend, serial_omap_resume) SET_RUNTIME_PM_OPS(serial_omap_runtime_suspend, serial_omap_runtime_resume, NULL) + .prepare = serial_omap_prepare, + .complete = serial_omap_complete, }; #if defined(CONFIG_OF) diff --git a/drivers/tty/serial/samsung.c b/drivers/tty/serial/samsung.c index 0c8a9fa2be6c..81ebc86a9e23 100644 --- a/drivers/tty/serial/samsung.c +++ b/drivers/tty/serial/samsung.c @@ -1811,7 +1811,13 @@ static int __init s3c24xx_serial_modinit(void) return ret; } - return platform_driver_register(&samsung_serial_driver); + ret = platform_driver_register(&samsung_serial_driver); + if (ret < 0) { + pr_err("Failed to register platform driver\n"); + uart_unregister_driver(&s3c24xx_uart_drv); + } + + return ret; } static void __exit s3c24xx_serial_modexit(void) diff --git a/drivers/tty/serial/sc26xx.c b/drivers/tty/serial/sc26xx.c index c9735680762d..4b1434d53e9d 100644 --- a/drivers/tty/serial/sc26xx.c +++ b/drivers/tty/serial/sc26xx.c @@ -696,7 +696,7 @@ static int sc26xx_probe(struct platform_device *dev) if (err) goto out_remove_ports; - dev_set_drvdata(&dev->dev, up); + platform_set_drvdata(dev, up); return 0; out_remove_ports: @@ -716,7 +716,7 @@ out_free_port: static int __exit sc26xx_driver_remove(struct platform_device *dev) { - struct uart_sc26xx_port *up = dev_get_drvdata(&dev->dev); + struct uart_sc26xx_port *up = platform_get_drvdata(dev); free_irq(up->port[0].irq, up); @@ -728,7 +728,6 @@ static int __exit sc26xx_driver_remove(struct platform_device *dev) kfree(up); sc26xx_port = NULL; - dev_set_drvdata(&dev->dev, NULL); return 0; } diff --git a/drivers/tty/serial/serial_core.c b/drivers/tty/serial/serial_core.c index f87dbfd32770..28cdd2829139 100644 --- a/drivers/tty/serial/serial_core.c +++ b/drivers/tty/serial/serial_core.c @@ -50,12 +50,6 @@ static struct lock_class_key port_lock_key; #define HIGH_BITS_OFFSET ((sizeof(long)-sizeof(int))*8) -#ifdef CONFIG_SERIAL_CORE_CONSOLE -#define uart_console(port) ((port)->cons && (port)->cons->index == (port)->line) -#else -#define uart_console(port) (0) -#endif - static void uart_change_speed(struct tty_struct *tty, struct uart_state *state, struct ktermios *old_termios); static void uart_wait_until_sent(struct tty_struct *tty, int timeout); diff --git a/drivers/tty/serial/sirfsoc_uart.c b/drivers/tty/serial/sirfsoc_uart.c index 03465b673945..1fd564b8194b 100644 --- a/drivers/tty/serial/sirfsoc_uart.c +++ b/drivers/tty/serial/sirfsoc_uart.c @@ -687,9 +687,10 @@ int sirfsoc_uart_probe(struct platform_device *pdev) if (sirfport->hw_flow_ctrl) { sirfport->p = pinctrl_get_select_default(&pdev->dev); - ret = IS_ERR(sirfport->p); - if (ret) + if (IS_ERR(sirfport->p)) { + ret = PTR_ERR(sirfport->p); goto err; + } } sirfport->clk = clk_get(&pdev->dev, NULL); diff --git a/drivers/tty/serial/sunhv.c b/drivers/tty/serial/sunhv.c index ba60708053e0..cf86e729532b 100644 --- a/drivers/tty/serial/sunhv.c +++ b/drivers/tty/serial/sunhv.c @@ -577,7 +577,7 @@ static int hv_probe(struct platform_device *op) if (err) goto out_remove_port; - dev_set_drvdata(&op->dev, port); + platform_set_drvdata(op, port); return 0; @@ -601,7 +601,7 @@ out_free_port: static int hv_remove(struct platform_device *dev) { - struct uart_port *port = dev_get_drvdata(&dev->dev); + struct uart_port *port = platform_get_drvdata(dev); free_irq(port->irq, port); @@ -612,8 +612,6 @@ static int hv_remove(struct platform_device *dev) kfree(port); sunhv_port = NULL; - dev_set_drvdata(&dev->dev, NULL); - return 0; } diff --git a/drivers/tty/serial/sunsab.c b/drivers/tty/serial/sunsab.c index a422c8b55a47..5d6136b2a04a 100644 --- a/drivers/tty/serial/sunsab.c +++ b/drivers/tty/serial/sunsab.c @@ -1037,7 +1037,7 @@ static int sab_probe(struct platform_device *op) if (err) goto out3; - dev_set_drvdata(&op->dev, &up[0]); + platform_set_drvdata(op, &up[0]); inst++; @@ -1059,7 +1059,7 @@ out: static int sab_remove(struct platform_device *op) { - struct uart_sunsab_port *up = dev_get_drvdata(&op->dev); + struct uart_sunsab_port *up = platform_get_drvdata(op); uart_remove_one_port(&sunsab_reg, &up[1].port); uart_remove_one_port(&sunsab_reg, &up[0].port); @@ -1070,8 +1070,6 @@ static int sab_remove(struct platform_device *op) up[0].port.membase, sizeof(union sab82532_async_regs)); - dev_set_drvdata(&op->dev, NULL); - return 0; } diff --git a/drivers/tty/serial/sunsu.c b/drivers/tty/serial/sunsu.c index 0d8465728473..699cc1b5f6aa 100644 --- a/drivers/tty/serial/sunsu.c +++ b/drivers/tty/serial/sunsu.c @@ -1454,7 +1454,7 @@ static int su_probe(struct platform_device *op) kfree(up); return err; } - dev_set_drvdata(&op->dev, up); + platform_set_drvdata(op, up); nr_inst++; @@ -1483,7 +1483,7 @@ static int su_probe(struct platform_device *op) if (err) goto out_unmap; - dev_set_drvdata(&op->dev, up); + platform_set_drvdata(op, up); nr_inst++; @@ -1496,7 +1496,7 @@ out_unmap: static int su_remove(struct platform_device *op) { - struct uart_sunsu_port *up = dev_get_drvdata(&op->dev); + struct uart_sunsu_port *up = platform_get_drvdata(op); bool kbdms = false; if (up->su_type == SU_PORT_MS || @@ -1516,8 +1516,6 @@ static int su_remove(struct platform_device *op) if (kbdms) kfree(up); - dev_set_drvdata(&op->dev, NULL); - return 0; } diff --git a/drivers/tty/serial/sunzilog.c b/drivers/tty/serial/sunzilog.c index 813ef8eb8eff..135a15203532 100644 --- a/drivers/tty/serial/sunzilog.c +++ b/drivers/tty/serial/sunzilog.c @@ -1495,7 +1495,7 @@ static int zs_probe(struct platform_device *op) kbm_inst++; } - dev_set_drvdata(&op->dev, &up[0]); + platform_set_drvdata(op, &up[0]); return 0; } @@ -1512,7 +1512,7 @@ static void zs_remove_one(struct uart_sunzilog_port *up) static int zs_remove(struct platform_device *op) { - struct uart_sunzilog_port *up = dev_get_drvdata(&op->dev); + struct uart_sunzilog_port *up = platform_get_drvdata(op); struct zilog_layout __iomem *regs; zs_remove_one(&up[0]); @@ -1521,8 +1521,6 @@ static int zs_remove(struct platform_device *op) regs = sunzilog_chip_regs[up[0].port.line / 2]; of_iounmap(&op->resource[0], regs, sizeof(struct zilog_layout)); - dev_set_drvdata(&op->dev, NULL); - return 0; } diff --git a/drivers/tty/serial/ucc_uart.c b/drivers/tty/serial/ucc_uart.c index 7355303dad99..88317482b81f 100644 --- a/drivers/tty/serial/ucc_uart.c +++ b/drivers/tty/serial/ucc_uart.c @@ -1451,7 +1451,7 @@ static int ucc_uart_probe(struct platform_device *ofdev) goto out_np; } - dev_set_drvdata(&ofdev->dev, qe_port); + platform_set_drvdata(ofdev, qe_port); dev_info(&ofdev->dev, "UCC%u assigned to /dev/ttyQE%u\n", qe_port->ucc_num + 1, qe_port->port.line); @@ -1471,13 +1471,12 @@ out_free: static int ucc_uart_remove(struct platform_device *ofdev) { - struct uart_qe_port *qe_port = dev_get_drvdata(&ofdev->dev); + struct uart_qe_port *qe_port = platform_get_drvdata(ofdev); dev_info(&ofdev->dev, "removing /dev/ttyQE%u\n", qe_port->port.line); uart_remove_one_port(&ucc_uart_driver, &qe_port->port); - dev_set_drvdata(&ofdev->dev, NULL); kfree(qe_port); return 0; @@ -1518,9 +1517,11 @@ static int __init ucc_uart_init(void) } ret = platform_driver_register(&ucc_uart_of_driver); - if (ret) + if (ret) { printk(KERN_ERR "ucc-uart: could not register platform driver\n"); + uart_unregister_driver(&ucc_uart_driver); + } return ret; } diff --git a/drivers/tty/serial/vt8500_serial.c b/drivers/tty/serial/vt8500_serial.c index 1a8bc2275ea4..48af43de3467 100644 --- a/drivers/tty/serial/vt8500_serial.c +++ b/drivers/tty/serial/vt8500_serial.c @@ -648,7 +648,7 @@ static struct platform_driver vt8500_platform_driver = { .driver = { .name = "vt8500_serial", .owner = THIS_MODULE, - .of_match_table = of_match_ptr(wmt_dt_ids), + .of_match_table = wmt_dt_ids, }, }; diff --git a/drivers/tty/serial/xilinx_uartps.c b/drivers/tty/serial/xilinx_uartps.c index 4e5c77834c50..6c9174530422 100644 --- a/drivers/tty/serial/xilinx_uartps.c +++ b/drivers/tty/serial/xilinx_uartps.c @@ -974,12 +974,11 @@ static int xuartps_probe(struct platform_device *pdev) port->dev = &pdev->dev; port->uartclk = clk_get_rate(clk); port->private_data = clk; - dev_set_drvdata(&pdev->dev, port); + platform_set_drvdata(pdev, port); rc = uart_add_one_port(&xuartps_uart_driver, port); if (rc) { dev_err(&pdev->dev, "uart_add_one_port() failed; err=%i\n", rc); - dev_set_drvdata(&pdev->dev, NULL); return rc; } return 0; @@ -994,46 +993,17 @@ static int xuartps_probe(struct platform_device *pdev) **/ static int xuartps_remove(struct platform_device *pdev) { - struct uart_port *port = dev_get_drvdata(&pdev->dev); + struct uart_port *port = platform_get_drvdata(pdev); struct clk *clk = port->private_data; int rc; /* Remove the xuartps port from the serial core */ rc = uart_remove_one_port(&xuartps_uart_driver, port); - dev_set_drvdata(&pdev->dev, NULL); port->mapbase = 0; clk_disable_unprepare(clk); return rc; } -/** - * xuartps_suspend - suspend event - * @pdev: Pointer to the platform device structure - * @state: State of the device - * - * Returns 0 - **/ -static int xuartps_suspend(struct platform_device *pdev, pm_message_t state) -{ - /* Call the API provided in serial_core.c file which handles - * the suspend. - */ - uart_suspend_port(&xuartps_uart_driver, &xuartps_port[pdev->id]); - return 0; -} - -/** - * xuartps_resume - Resume after a previous suspend - * @pdev: Pointer to the platform device structure - * - * Returns 0 - **/ -static int xuartps_resume(struct platform_device *pdev) -{ - uart_resume_port(&xuartps_uart_driver, &xuartps_port[pdev->id]); - return 0; -} - /* Match table for of_platform binding */ static struct of_device_id xuartps_of_match[] = { { .compatible = "xlnx,xuartps", }, @@ -1044,8 +1014,6 @@ MODULE_DEVICE_TABLE(of, xuartps_of_match); static struct platform_driver xuartps_platform_driver = { .probe = xuartps_probe, /* Probe method */ .remove = xuartps_remove, /* Detach method */ - .suspend = xuartps_suspend, /* Suspend */ - .resume = xuartps_resume, /* Resume after a suspend */ .driver = { .owner = THIS_MODULE, .name = XUARTPS_NAME, /* Driver name */ diff --git a/drivers/tty/sysrq.c b/drivers/tty/sysrq.c index b51c15408ff3..5f68f2cfdfd0 100644 --- a/drivers/tty/sysrq.c +++ b/drivers/tty/sysrq.c @@ -932,7 +932,7 @@ static int sysrq_reset_seq_param_set(const char *buffer, unsigned long val; int error; - error = strict_strtoul(buffer, 0, &val); + error = kstrtoul(buffer, 0, &val); if (error < 0) return error; diff --git a/drivers/tty/tty_ldsem.c b/drivers/tty/tty_ldsem.c new file mode 100644 index 000000000000..22fad8ad5ac2 --- /dev/null +++ b/drivers/tty/tty_ldsem.c @@ -0,0 +1,453 @@ +/* + * Ldisc rw semaphore + * + * The ldisc semaphore is semantically a rw_semaphore but which enforces + * an alternate policy, namely: + * 1) Supports lock wait timeouts + * 2) Write waiter has priority + * 3) Downgrading is not supported + * + * Implementation notes: + * 1) Upper half of semaphore count is a wait count (differs from rwsem + * in that rwsem normalizes the upper half to the wait bias) + * 2) Lacks overflow checking + * + * The generic counting was copied and modified from include/asm-generic/rwsem.h + * by Paul Mackerras <paulus@samba.org>. + * + * The scheduling policy was copied and modified from lib/rwsem.c + * Written by David Howells (dhowells@redhat.com). + * + * This implementation incorporates the write lock stealing work of + * Michel Lespinasse <walken@google.com>. + * + * Copyright (C) 2013 Peter Hurley <peter@hurleysoftware.com> + * + * This file may be redistributed under the terms of the GNU General Public + * License v2. + */ + +#include <linux/list.h> +#include <linux/spinlock.h> +#include <linux/atomic.h> +#include <linux/tty.h> +#include <linux/sched.h> + + +#ifdef CONFIG_DEBUG_LOCK_ALLOC +# define __acq(l, s, t, r, c, n, i) \ + lock_acquire(&(l)->dep_map, s, t, r, c, n, i) +# define __rel(l, n, i) \ + lock_release(&(l)->dep_map, n, i) +# ifdef CONFIG_PROVE_LOCKING +# define lockdep_acquire(l, s, t, i) __acq(l, s, t, 0, 2, NULL, i) +# define lockdep_acquire_nest(l, s, t, n, i) __acq(l, s, t, 0, 2, n, i) +# define lockdep_acquire_read(l, s, t, i) __acq(l, s, t, 1, 2, NULL, i) +# define lockdep_release(l, n, i) __rel(l, n, i) +# else +# define lockdep_acquire(l, s, t, i) __acq(l, s, t, 0, 1, NULL, i) +# define lockdep_acquire_nest(l, s, t, n, i) __acq(l, s, t, 0, 1, n, i) +# define lockdep_acquire_read(l, s, t, i) __acq(l, s, t, 1, 1, NULL, i) +# define lockdep_release(l, n, i) __rel(l, n, i) +# endif +#else +# define lockdep_acquire(l, s, t, i) do { } while (0) +# define lockdep_acquire_nest(l, s, t, n, i) do { } while (0) +# define lockdep_acquire_read(l, s, t, i) do { } while (0) +# define lockdep_release(l, n, i) do { } while (0) +#endif + +#ifdef CONFIG_LOCK_STAT +# define lock_stat(_lock, stat) lock_##stat(&(_lock)->dep_map, _RET_IP_) +#else +# define lock_stat(_lock, stat) do { } while (0) +#endif + + +#if BITS_PER_LONG == 64 +# define LDSEM_ACTIVE_MASK 0xffffffffL +#else +# define LDSEM_ACTIVE_MASK 0x0000ffffL +#endif + +#define LDSEM_UNLOCKED 0L +#define LDSEM_ACTIVE_BIAS 1L +#define LDSEM_WAIT_BIAS (-LDSEM_ACTIVE_MASK-1) +#define LDSEM_READ_BIAS LDSEM_ACTIVE_BIAS +#define LDSEM_WRITE_BIAS (LDSEM_WAIT_BIAS + LDSEM_ACTIVE_BIAS) + +struct ldsem_waiter { + struct list_head list; + struct task_struct *task; +}; + +static inline long ldsem_atomic_update(long delta, struct ld_semaphore *sem) +{ + return atomic_long_add_return(delta, (atomic_long_t *)&sem->count); +} + +static inline int ldsem_cmpxchg(long *old, long new, struct ld_semaphore *sem) +{ + long tmp = *old; + *old = atomic_long_cmpxchg(&sem->count, *old, new); + return *old == tmp; +} + +/* + * Initialize an ldsem: + */ +void __init_ldsem(struct ld_semaphore *sem, const char *name, + struct lock_class_key *key) +{ +#ifdef CONFIG_DEBUG_LOCK_ALLOC + /* + * Make sure we are not reinitializing a held semaphore: + */ + debug_check_no_locks_freed((void *)sem, sizeof(*sem)); + lockdep_init_map(&sem->dep_map, name, key, 0); +#endif + sem->count = LDSEM_UNLOCKED; + sem->wait_readers = 0; + raw_spin_lock_init(&sem->wait_lock); + INIT_LIST_HEAD(&sem->read_wait); + INIT_LIST_HEAD(&sem->write_wait); +} + +static void __ldsem_wake_readers(struct ld_semaphore *sem) +{ + struct ldsem_waiter *waiter, *next; + struct task_struct *tsk; + long adjust, count; + + /* Try to grant read locks to all readers on the read wait list. + * Note the 'active part' of the count is incremented by + * the number of readers before waking any processes up. + */ + adjust = sem->wait_readers * (LDSEM_ACTIVE_BIAS - LDSEM_WAIT_BIAS); + count = ldsem_atomic_update(adjust, sem); + do { + if (count > 0) + break; + if (ldsem_cmpxchg(&count, count - adjust, sem)) + return; + } while (1); + + list_for_each_entry_safe(waiter, next, &sem->read_wait, list) { + tsk = waiter->task; + smp_mb(); + waiter->task = NULL; + wake_up_process(tsk); + put_task_struct(tsk); + } + INIT_LIST_HEAD(&sem->read_wait); + sem->wait_readers = 0; +} + +static inline int writer_trylock(struct ld_semaphore *sem) +{ + /* only wake this writer if the active part of the count can be + * transitioned from 0 -> 1 + */ + long count = ldsem_atomic_update(LDSEM_ACTIVE_BIAS, sem); + do { + if ((count & LDSEM_ACTIVE_MASK) == LDSEM_ACTIVE_BIAS) + return 1; + if (ldsem_cmpxchg(&count, count - LDSEM_ACTIVE_BIAS, sem)) + return 0; + } while (1); +} + +static void __ldsem_wake_writer(struct ld_semaphore *sem) +{ + struct ldsem_waiter *waiter; + + waiter = list_entry(sem->write_wait.next, struct ldsem_waiter, list); + wake_up_process(waiter->task); +} + +/* + * handle the lock release when processes blocked on it that can now run + * - if we come here from up_xxxx(), then: + * - the 'active part' of count (&0x0000ffff) reached 0 (but may have changed) + * - the 'waiting part' of count (&0xffff0000) is -ve (and will still be so) + * - the spinlock must be held by the caller + * - woken process blocks are discarded from the list after having task zeroed + */ +static void __ldsem_wake(struct ld_semaphore *sem) +{ + if (!list_empty(&sem->write_wait)) + __ldsem_wake_writer(sem); + else if (!list_empty(&sem->read_wait)) + __ldsem_wake_readers(sem); +} + +static void ldsem_wake(struct ld_semaphore *sem) +{ + unsigned long flags; + + raw_spin_lock_irqsave(&sem->wait_lock, flags); + __ldsem_wake(sem); + raw_spin_unlock_irqrestore(&sem->wait_lock, flags); +} + +/* + * wait for the read lock to be granted + */ +static struct ld_semaphore __sched * +down_read_failed(struct ld_semaphore *sem, long count, long timeout) +{ + struct ldsem_waiter waiter; + struct task_struct *tsk = current; + long adjust = -LDSEM_ACTIVE_BIAS + LDSEM_WAIT_BIAS; + + /* set up my own style of waitqueue */ + raw_spin_lock_irq(&sem->wait_lock); + + /* Try to reverse the lock attempt but if the count has changed + * so that reversing fails, check if there are are no waiters, + * and early-out if not */ + do { + if (ldsem_cmpxchg(&count, count + adjust, sem)) + break; + if (count > 0) { + raw_spin_unlock_irq(&sem->wait_lock); + return sem; + } + } while (1); + + list_add_tail(&waiter.list, &sem->read_wait); + sem->wait_readers++; + + waiter.task = tsk; + get_task_struct(tsk); + + /* if there are no active locks, wake the new lock owner(s) */ + if ((count & LDSEM_ACTIVE_MASK) == 0) + __ldsem_wake(sem); + + raw_spin_unlock_irq(&sem->wait_lock); + + /* wait to be given the lock */ + for (;;) { + set_task_state(tsk, TASK_UNINTERRUPTIBLE); + + if (!waiter.task) + break; + if (!timeout) + break; + timeout = schedule_timeout(timeout); + } + + __set_task_state(tsk, TASK_RUNNING); + + if (!timeout) { + /* lock timed out but check if this task was just + * granted lock ownership - if so, pretend there + * was no timeout; otherwise, cleanup lock wait */ + raw_spin_lock_irq(&sem->wait_lock); + if (waiter.task) { + ldsem_atomic_update(-LDSEM_WAIT_BIAS, sem); + list_del(&waiter.list); + raw_spin_unlock_irq(&sem->wait_lock); + put_task_struct(waiter.task); + return NULL; + } + raw_spin_unlock_irq(&sem->wait_lock); + } + + return sem; +} + +/* + * wait for the write lock to be granted + */ +static struct ld_semaphore __sched * +down_write_failed(struct ld_semaphore *sem, long count, long timeout) +{ + struct ldsem_waiter waiter; + struct task_struct *tsk = current; + long adjust = -LDSEM_ACTIVE_BIAS; + int locked = 0; + + /* set up my own style of waitqueue */ + raw_spin_lock_irq(&sem->wait_lock); + + /* Try to reverse the lock attempt but if the count has changed + * so that reversing fails, check if the lock is now owned, + * and early-out if so */ + do { + if (ldsem_cmpxchg(&count, count + adjust, sem)) + break; + if ((count & LDSEM_ACTIVE_MASK) == LDSEM_ACTIVE_BIAS) { + raw_spin_unlock_irq(&sem->wait_lock); + return sem; + } + } while (1); + + list_add_tail(&waiter.list, &sem->write_wait); + + waiter.task = tsk; + + set_task_state(tsk, TASK_UNINTERRUPTIBLE); + for (;;) { + if (!timeout) + break; + raw_spin_unlock_irq(&sem->wait_lock); + timeout = schedule_timeout(timeout); + raw_spin_lock_irq(&sem->wait_lock); + set_task_state(tsk, TASK_UNINTERRUPTIBLE); + if ((locked = writer_trylock(sem))) + break; + } + + if (!locked) + ldsem_atomic_update(-LDSEM_WAIT_BIAS, sem); + list_del(&waiter.list); + raw_spin_unlock_irq(&sem->wait_lock); + + __set_task_state(tsk, TASK_RUNNING); + + /* lock wait may have timed out */ + if (!locked) + return NULL; + return sem; +} + + + +static inline int __ldsem_down_read_nested(struct ld_semaphore *sem, + int subclass, long timeout) +{ + long count; + + lockdep_acquire_read(sem, subclass, 0, _RET_IP_); + + count = ldsem_atomic_update(LDSEM_READ_BIAS, sem); + if (count <= 0) { + lock_stat(sem, contended); + if (!down_read_failed(sem, count, timeout)) { + lockdep_release(sem, 1, _RET_IP_); + return 0; + } + } + lock_stat(sem, acquired); + return 1; +} + +static inline int __ldsem_down_write_nested(struct ld_semaphore *sem, + int subclass, long timeout) +{ + long count; + + lockdep_acquire(sem, subclass, 0, _RET_IP_); + + count = ldsem_atomic_update(LDSEM_WRITE_BIAS, sem); + if ((count & LDSEM_ACTIVE_MASK) != LDSEM_ACTIVE_BIAS) { + lock_stat(sem, contended); + if (!down_write_failed(sem, count, timeout)) { + lockdep_release(sem, 1, _RET_IP_); + return 0; + } + } + lock_stat(sem, acquired); + return 1; +} + + +/* + * lock for reading -- returns 1 if successful, 0 if timed out + */ +int __sched ldsem_down_read(struct ld_semaphore *sem, long timeout) +{ + might_sleep(); + return __ldsem_down_read_nested(sem, 0, timeout); +} + +/* + * trylock for reading -- returns 1 if successful, 0 if contention + */ +int ldsem_down_read_trylock(struct ld_semaphore *sem) +{ + long count = sem->count; + + while (count >= 0) { + if (ldsem_cmpxchg(&count, count + LDSEM_READ_BIAS, sem)) { + lockdep_acquire_read(sem, 0, 1, _RET_IP_); + lock_stat(sem, acquired); + return 1; + } + } + return 0; +} + +/* + * lock for writing -- returns 1 if successful, 0 if timed out + */ +int __sched ldsem_down_write(struct ld_semaphore *sem, long timeout) +{ + might_sleep(); + return __ldsem_down_write_nested(sem, 0, timeout); +} + +/* + * trylock for writing -- returns 1 if successful, 0 if contention + */ +int ldsem_down_write_trylock(struct ld_semaphore *sem) +{ + long count = sem->count; + + while ((count & LDSEM_ACTIVE_MASK) == 0) { + if (ldsem_cmpxchg(&count, count + LDSEM_WRITE_BIAS, sem)) { + lockdep_acquire(sem, 0, 1, _RET_IP_); + lock_stat(sem, acquired); + return 1; + } + } + return 0; +} + +/* + * release a read lock + */ +void ldsem_up_read(struct ld_semaphore *sem) +{ + long count; + + lockdep_release(sem, 1, _RET_IP_); + + count = ldsem_atomic_update(-LDSEM_READ_BIAS, sem); + if (count < 0 && (count & LDSEM_ACTIVE_MASK) == 0) + ldsem_wake(sem); +} + +/* + * release a write lock + */ +void ldsem_up_write(struct ld_semaphore *sem) +{ + long count; + + lockdep_release(sem, 1, _RET_IP_); + + count = ldsem_atomic_update(-LDSEM_WRITE_BIAS, sem); + if (count < 0) + ldsem_wake(sem); +} + + +#ifdef CONFIG_DEBUG_LOCK_ALLOC + +int ldsem_down_read_nested(struct ld_semaphore *sem, int subclass, long timeout) +{ + might_sleep(); + return __ldsem_down_read_nested(sem, subclass, timeout); +} + +int ldsem_down_write_nested(struct ld_semaphore *sem, int subclass, + long timeout) +{ + might_sleep(); + return __ldsem_down_write_nested(sem, subclass, timeout); +} + +#endif diff --git a/drivers/tty/vt/vt.c b/drivers/tty/vt/vt.c index 740202d8a5c4..c677829baa8b 100644 --- a/drivers/tty/vt/vt.c +++ b/drivers/tty/vt/vt.c @@ -3086,17 +3086,6 @@ err: }; -static int bind_con_driver(const struct consw *csw, int first, int last, - int deflt) -{ - int ret; - - console_lock(); - ret = do_bind_con_driver(csw, first, last, deflt); - console_unlock(); - return ret; -} - #ifdef CONFIG_VT_HW_CONSOLE_BINDING static int con_is_graphics(const struct consw *csw, int first, int last) { @@ -3114,34 +3103,6 @@ static int con_is_graphics(const struct consw *csw, int first, int last) return retval; } -/** - * unbind_con_driver - unbind a console driver - * @csw: pointer to console driver to unregister - * @first: first in range of consoles that @csw should be unbound from - * @last: last in range of consoles that @csw should be unbound from - * @deflt: should next bound console driver be default after @csw is unbound? - * - * To unbind a driver from all possible consoles, pass 0 as @first and - * %MAX_NR_CONSOLES as @last. - * - * @deflt controls whether the console that ends up replacing @csw should be - * the default console. - * - * RETURNS: - * -ENODEV if @csw isn't a registered console driver or can't be unregistered - * or 0 on success. - */ -int unbind_con_driver(const struct consw *csw, int first, int last, int deflt) -{ - int retval; - - console_lock(); - retval = do_unbind_con_driver(csw, first, last, deflt); - console_unlock(); - return retval; -} -EXPORT_SYMBOL(unbind_con_driver); - /* unlocked version of unbind_con_driver() */ int do_unbind_con_driver(const struct consw *csw, int first, int last, int deflt) { @@ -3262,8 +3223,11 @@ static int vt_bind(struct con_driver *con) if (first == 0 && last == MAX_NR_CONSOLES -1) deflt = 1; - if (first != -1) - bind_con_driver(csw, first, last, deflt); + if (first != -1) { + console_lock(); + do_bind_con_driver(csw, first, last, deflt); + console_unlock(); + } first = -1; last = -1; @@ -3301,8 +3265,11 @@ static int vt_unbind(struct con_driver *con) if (first == 0 && last == MAX_NR_CONSOLES -1) deflt = 1; - if (first != -1) - unbind_con_driver(csw, first, last, deflt); + if (first != -1) { + console_lock(); + do_unbind_con_driver(csw, first, last, deflt); + console_unlock(); + } first = -1; last = -1; @@ -3574,29 +3541,9 @@ err: return retval; } -/** - * register_con_driver - register console driver to console layer - * @csw: console driver - * @first: the first console to take over, minimum value is 0 - * @last: the last console to take over, maximum value is MAX_NR_CONSOLES -1 - * - * DESCRIPTION: This function registers a console driver which can later - * bind to a range of consoles specified by @first and @last. It will - * also initialize the console driver by calling con_startup(). - */ -int register_con_driver(const struct consw *csw, int first, int last) -{ - int retval; - - console_lock(); - retval = do_register_con_driver(csw, first, last); - console_unlock(); - return retval; -} -EXPORT_SYMBOL(register_con_driver); /** - * unregister_con_driver - unregister console driver from console layer + * do_unregister_con_driver - unregister console driver from console layer * @csw: console driver * * DESCRIPTION: All drivers that registers to the console layer must @@ -3606,17 +3553,6 @@ EXPORT_SYMBOL(register_con_driver); * * The driver must unbind first prior to unregistration. */ -int unregister_con_driver(const struct consw *csw) -{ - int retval; - - console_lock(); - retval = do_unregister_con_driver(csw); - console_unlock(); - return retval; -} -EXPORT_SYMBOL(unregister_con_driver); - int do_unregister_con_driver(const struct consw *csw) { int i, retval = -ENODEV; @@ -3654,7 +3590,7 @@ EXPORT_SYMBOL_GPL(do_unregister_con_driver); * when a driver wants to take over some existing consoles * and become default driver for newly opened ones. * - * take_over_console is basically a register followed by unbind + * do_take_over_console is basically a register followed by unbind */ int do_take_over_console(const struct consw *csw, int first, int last, int deflt) { @@ -3675,30 +3611,6 @@ int do_take_over_console(const struct consw *csw, int first, int last, int deflt } EXPORT_SYMBOL_GPL(do_take_over_console); -/* - * If we support more console drivers, this function is used - * when a driver wants to take over some existing consoles - * and become default driver for newly opened ones. - * - * take_over_console is basically a register followed by unbind - */ -int take_over_console(const struct consw *csw, int first, int last, int deflt) -{ - int err; - - err = register_con_driver(csw, first, last); - /* - * If we get an busy error we still want to bind the console driver - * and return success, as we may have unbound the console driver - * but not unregistered it. - */ - if (err == -EBUSY) - err = 0; - if (!err) - bind_con_driver(csw, first, last, deflt); - - return err; -} /* * give_up_console is a wrapper to unregister_con_driver. It will only @@ -3706,7 +3618,9 @@ int take_over_console(const struct consw *csw, int first, int last, int deflt) */ void give_up_console(const struct consw *csw) { - unregister_con_driver(csw); + console_lock(); + do_unregister_con_driver(csw); + console_unlock(); } static int __init vtconsole_class_init(void) @@ -4262,6 +4176,5 @@ EXPORT_SYMBOL(console_blanked); EXPORT_SYMBOL(vc_cons); EXPORT_SYMBOL(global_cursor_default); #ifndef VT_SINGLE_DRIVER -EXPORT_SYMBOL(take_over_console); EXPORT_SYMBOL(give_up_console); #endif diff --git a/drivers/usb/misc/sisusbvga/sisusb_con.c b/drivers/usb/misc/sisusbvga/sisusb_con.c index 411e605f448a..a638c4e9a947 100644 --- a/drivers/usb/misc/sisusbvga/sisusb_con.c +++ b/drivers/usb/misc/sisusbvga/sisusb_con.c @@ -208,7 +208,7 @@ sisusbcon_init(struct vc_data *c, int init) struct sisusb_usb_data *sisusb; int cols, rows; - /* This is called by take_over_console(), + /* This is called by do_take_over_console(), * ie by us/under our control. It is * only called after text mode and fonts * are set up/restored. @@ -273,7 +273,7 @@ sisusbcon_deinit(struct vc_data *c) struct sisusb_usb_data *sisusb; int i; - /* This is called by take_over_console() + /* This is called by do_take_over_console() * and others, ie not under our control. */ @@ -1490,8 +1490,9 @@ sisusb_console_init(struct sisusb_usb_data *sisusb, int first, int last) mutex_unlock(&sisusb->lock); /* Now grab the desired console(s) */ - ret = take_over_console(&sisusb_con, first - 1, last - 1, 0); - + console_lock(); + ret = do_take_over_console(&sisusb_con, first - 1, last - 1, 0); + console_unlock(); if (!ret) sisusb->haveconsole = 1; else { @@ -1535,11 +1536,14 @@ sisusb_console_exit(struct sisusb_usb_data *sisusb) if (sisusb->haveconsole) { for (i = 0; i < MAX_NR_CONSOLES; i++) - if (sisusb->havethisconsole[i]) - take_over_console(&sisusb_dummy_con, i, i, 0); + if (sisusb->havethisconsole[i]) { + console_lock(); + do_take_over_console(&sisusb_dummy_con, i, i, 0); + console_unlock(); /* At this point, con_deinit for all our - * consoles is executed by take_over_console(). + * consoles is executed by do_take_over_console(). */ + } sisusb->haveconsole = 0; } diff --git a/drivers/video/console/fbcon.c b/drivers/video/console/fbcon.c index a92783e480e6..d55b33757465 100644 --- a/drivers/video/console/fbcon.c +++ b/drivers/video/console/fbcon.c @@ -556,34 +556,6 @@ static int do_fbcon_takeover(int show_logo) return err; } -static int fbcon_takeover(int show_logo) -{ - int err, i; - - if (!num_registered_fb) - return -ENODEV; - - if (!show_logo) - logo_shown = FBCON_LOGO_DONTSHOW; - - for (i = first_fb_vc; i <= last_fb_vc; i++) - con2fb_map[i] = info_idx; - - err = take_over_console(&fb_con, first_fb_vc, last_fb_vc, - fbcon_is_default); - - if (err) { - for (i = first_fb_vc; i <= last_fb_vc; i++) { - con2fb_map[i] = -1; - } - info_idx = -1; - } else { - fbcon_has_console_bind = 1; - } - - return err; -} - #ifdef MODULE static void fbcon_prepare_logo(struct vc_data *vc, struct fb_info *info, int cols, int rows, int new_cols, int new_rows) @@ -901,7 +873,7 @@ static int set_con2fb_map(int unit, int newidx, int user) /* * Low Level Operations */ -/* NOTE: fbcon cannot be __init: it may be called from take_over_console later */ +/* NOTE: fbcon cannot be __init: it may be called from do_take_over_console later */ static int var_to_display(struct display *disp, struct fb_var_screeninfo *var, struct fb_info *info) @@ -3543,8 +3515,9 @@ static void fbcon_start(void) } } + do_fbcon_takeover(0); console_unlock(); - fbcon_takeover(0); + } } @@ -3648,8 +3621,8 @@ static void __exit fb_console_exit(void) fbcon_deinit_device(); device_destroy(fb_class, MKDEV(0, 0)); fbcon_exit(); + do_unregister_con_driver(&fb_con); console_unlock(); - unregister_con_driver(&fb_con); } module_exit(fb_console_exit); diff --git a/drivers/video/console/mdacon.c b/drivers/video/console/mdacon.c index 0b67866cae10..296e94561556 100644 --- a/drivers/video/console/mdacon.c +++ b/drivers/video/console/mdacon.c @@ -585,10 +585,14 @@ static const struct consw mda_con = { int __init mda_console_init(void) { + int err; + if (mda_first_vc > mda_last_vc) return 1; - - return take_over_console(&mda_con, mda_first_vc-1, mda_last_vc-1, 0); + console_lock(); + err = do_take_over_console(&mda_con, mda_first_vc-1, mda_last_vc-1, 0); + console_unlock(); + return err; } static void __exit mda_console_exit(void) diff --git a/drivers/video/console/newport_con.c b/drivers/video/console/newport_con.c index b05afd03729e..a6ab9299813c 100644 --- a/drivers/video/console/newport_con.c +++ b/drivers/video/console/newport_con.c @@ -297,7 +297,7 @@ static void newport_exit(void) newport_set_def_font(i, NULL); } -/* Can't be __init, take_over_console may call it later */ +/* Can't be __init, do_take_over_console may call it later */ static const char *newport_startup(void) { int i; @@ -746,6 +746,7 @@ static int newport_probe(struct gio_device *dev, const struct gio_device_id *id) { unsigned long newport_addr; + int err; if (!dev->resource.start) return -EINVAL; @@ -759,8 +760,10 @@ static int newport_probe(struct gio_device *dev, npregs = (struct newport_regs *)/* ioremap cannot fail */ ioremap(newport_addr, sizeof(struct newport_regs)); - - return take_over_console(&newport_con, 0, MAX_NR_CONSOLES - 1, 1); + console_lock(); + err = do_take_over_console(&newport_con, 0, MAX_NR_CONSOLES - 1, 1); + console_unlock(); + return err; } static void newport_remove(struct gio_device *dev) diff --git a/drivers/video/console/sticon.c b/drivers/video/console/sticon.c index 491c1c1baf4c..5f65ca3d8564 100644 --- a/drivers/video/console/sticon.c +++ b/drivers/video/console/sticon.c @@ -372,6 +372,7 @@ static const struct consw sti_con = { static int __init sticonsole_init(void) { + int err; /* already initialized ? */ if (sticon_sti) return 0; @@ -382,7 +383,10 @@ static int __init sticonsole_init(void) if (conswitchp == &dummy_con) { printk(KERN_INFO "sticon: Initializing STI text console.\n"); - return take_over_console(&sti_con, 0, MAX_NR_CONSOLES - 1, 1); + console_lock(); + err = do_take_over_console(&sti_con, 0, MAX_NR_CONSOLES - 1, 1); + console_unlock(); + return err; } return 0; } diff --git a/include/linux/console.h b/include/linux/console.h index 73bab0f58af5..7571a16bd653 100644 --- a/include/linux/console.h +++ b/include/linux/console.h @@ -75,10 +75,7 @@ extern const struct consw newport_con; /* SGI Newport console */ extern const struct consw prom_con; /* SPARC PROM console */ int con_is_bound(const struct consw *csw); -int register_con_driver(const struct consw *csw, int first, int last); -int unregister_con_driver(const struct consw *csw); int do_unregister_con_driver(const struct consw *csw); -int take_over_console(const struct consw *sw, int first, int last, int deflt); int do_take_over_console(const struct consw *sw, int first, int last, int deflt); void give_up_console(const struct consw *sw); #ifdef CONFIG_HW_CONSOLE diff --git a/include/linux/serial_core.h b/include/linux/serial_core.h index 87d4bbc773fc..b98291ac7f14 100644 --- a/include/linux/serial_core.h +++ b/include/linux/serial_core.h @@ -31,6 +31,13 @@ #include <linux/sysrq.h> #include <uapi/linux/serial_core.h> +#ifdef CONFIG_SERIAL_CORE_CONSOLE +#define uart_console(port) \ + ((port)->cons && (port)->cons->index == (port)->line) +#else +#define uart_console(port) (0) +#endif + struct uart_port; struct serial_struct; struct device; diff --git a/include/linux/tty.h b/include/linux/tty.h index 8780bd2a272a..82ab69bc9b79 100644 --- a/include/linux/tty.h +++ b/include/linux/tty.h @@ -309,8 +309,6 @@ struct tty_file_private { #define TTY_LDISC 9 /* Line discipline attached */ #define TTY_LDISC_CHANGING 10 /* Line discipline changing */ #define TTY_LDISC_OPEN 11 /* Line discipline is open */ -#define TTY_HW_COOK_OUT 14 /* Hardware can do output cooking */ -#define TTY_HW_COOK_IN 15 /* Hardware can do input cooking */ #define TTY_PTY_LOCK 16 /* pty private */ #define TTY_NO_WRITE_SPLIT 17 /* Preserve write boundaries to driver */ #define TTY_HUPPED 18 /* Post driver->hangup() */ diff --git a/include/linux/tty_ldisc.h b/include/linux/tty_ldisc.h index 58390c73df8b..7b24bbd85ea8 100644 --- a/include/linux/tty_ldisc.h +++ b/include/linux/tty_ldisc.h @@ -110,6 +110,52 @@ #include <linux/wait.h> #include <linux/wait.h> + +/* + * the semaphore definition + */ +struct ld_semaphore { + long count; + raw_spinlock_t wait_lock; + unsigned int wait_readers; + struct list_head read_wait; + struct list_head write_wait; +#ifdef CONFIG_DEBUG_LOCK_ALLOC + struct lockdep_map dep_map; +#endif +}; + +extern void __init_ldsem(struct ld_semaphore *sem, const char *name, + struct lock_class_key *key); + +#define init_ldsem(sem) \ +do { \ + static struct lock_class_key __key; \ + \ + __init_ldsem((sem), #sem, &__key); \ +} while (0) + + +extern int ldsem_down_read(struct ld_semaphore *sem, long timeout); +extern int ldsem_down_read_trylock(struct ld_semaphore *sem); +extern int ldsem_down_write(struct ld_semaphore *sem, long timeout); +extern int ldsem_down_write_trylock(struct ld_semaphore *sem); +extern void ldsem_up_read(struct ld_semaphore *sem); +extern void ldsem_up_write(struct ld_semaphore *sem); + +#ifdef CONFIG_DEBUG_LOCK_ALLOC +extern int ldsem_down_read_nested(struct ld_semaphore *sem, int subclass, + long timeout); +extern int ldsem_down_write_nested(struct ld_semaphore *sem, int subclass, + long timeout); +#else +# define ldsem_down_read_nested(sem, subclass, timeout) \ + ldsem_down_read(sem, timeout) +# define ldsem_down_write_nested(sem, subclass, timeout) \ + ldsem_down_write(sem, timeout) +#endif + + struct tty_ldisc_ops { int magic; char *name; diff --git a/include/linux/vt_kern.h b/include/linux/vt_kern.h index 0d33fca48774..8d7634247fb4 100644 --- a/include/linux/vt_kern.h +++ b/include/linux/vt_kern.h @@ -133,8 +133,6 @@ void change_console(struct vc_data *new_vc); void reset_vc(struct vc_data *vc); extern int do_unbind_con_driver(const struct consw *csw, int first, int last, int deflt); -extern int unbind_con_driver(const struct consw *csw, int first, int last, - int deflt); int vty_init(const struct file_operations *console_fops); static inline bool vt_force_oops_output(struct vc_data *vc) |