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2012-10-01MIPS: ath79: Fix CPU/DDR frequency calculation for SRIF PLLsGabor Juhos
Besides the CPU and DDR PLLs, the CPU and DDR frequencies can be derived from other PLLs in the SRIF block on the AR934x SoCs. The current code does not checks if the SRIF PLLs are used and this can lead to incorrectly calculated CPU/DDR frequencies. Fix it by calculating the frequencies from SRIF PLLs if those are used on a given board. Signed-off-by: Gabor Juhos <juhosg@openwrt.org> Cc: <stable@vger.kernel.org> Cc: linux-mips@linux-mips.org Patchwork: https://patchwork.linux-mips.org/patch/4324/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2012-10-01MIPS: ath79: use correct fractional dividers for {CPU,DDR}_PLL on AR934xGabor Juhos
The current dividers in the code are wrong and this leads to broken CPU frequency calculation on boards where the fractional part is used. For example, if the SoC is running from a 40MHz reference clock, refdiv=1, nint=14, outdiv=0 and nfrac=31 the real frequency is 579.375MHz but the current code calculates 569.687MHz instead. Because the system time is indirectly related to the CPU frequency the broken computation causes drift in the system time. The correct divider is 2^6 for the CPU PLL and 2^10 for the DDR PLL. Use the correct values to fix the issue. Signed-off-by: Gabor Juhos <juhosg@openwrt.org> Cc: stable@vger.kernel.org Cc: linux-mips@linux-mips.org Patchwork: https://patchwork.linux-mips.org/patch/4305/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2012-10-01MIPS: BCM63XX: Properly handle mac address octet overflowJonas Gorski
While calculating the mac address the pointer for the current octet was never reset back to the least significant one after being decremented because of an octet overflow. This resulted in the code continuing to increment at the current octet, potentially generating duplicate or invalid mac addresses. As a second issue the pointer was allowed to advance up to the most significant octet, modifying the OUI, and potentially changing the type of mac address. Rewrite the code so it resets the pointer to the least significant in each outer loop step, and bails out when the least significant octet of the OUI is reached. Signed-off-by: Jonas Gorski <jonas.gorski@gmail.com> Cc: linux-mips@linux-mips.org Cc: Maxime Bizon <mbizon@freebox.fr> Cc: Florian Fainelli <florian@openwrt.org> Cc: Sergei Shtylyov <sshtylyov@mvista.com> Patchwork: https://patchwork.linux-mips.org/patch/4348/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2012-10-01MIPS: Kconfig: Avoid build errors by hiding USE_OF from the user.Jonas Gorski
b01da9f1 ("MIPS: Prune some target specific code out of prom.c") removed the generic implementation of device_tree_init, breaking the kernel build when manually selecting USE_OF. Hide the config symbol so it can't be selected acidentially anymore. Signed-off-by: Jonas Gorski <jonas.gorski@gmail.com> Cc: linux-mips@linux-mips.org Cc: David Daney <david.daney@cavium.com> Patchwork: https://patchwork.linux-mips.org/patch/4346/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2012-09-28Merge branch 'ralf-3.7' of ↵Ralf Baechle
git://git.linux-mips.org/pub/scm/sjhill/linux-sjhill into mips-for-linux-next
2012-09-28Merge branch 'rixi-3.7' of ↵Ralf Baechle
git://git.linux-mips.org/pub/scm/sjhill/linux-sjhill into mips-for-linux-next
2012-09-27Merge branch 'broadcom' of git://dev.phrozen.org/mips-next into ↵Ralf Baechle
mips-for-linux-next
2012-09-27Merge branch 'ath79' of git://dev.phrozen.org/mips-next into mips-for-linux-nextRalf Baechle
2012-09-27Merge branch 'lantiq' of git://dev.phrozen.org/mips-next into ↵Ralf Baechle
mips-for-linux-next
2012-09-27Merge branch 'cn6xxx-mgmt' of ↵Ralf Baechle
git://git.linux-mips.org/pub/scm/daney/upstream-daney into mips-for-linux-next
2012-09-27Merge branch 'cn68xx-ciu2' of ↵Ralf Baechle
git://git.linux-mips.org/pub/scm/daney/upstream-daney into mips-for-linux-next
2012-09-26MIPS: Replace `-' in defconfig filename wth `_' for consistency.Ralf Baechle
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2012-09-26MIPS: Wire kcmp syscall.Ralf Baechle
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2012-09-25MIPS: MIPSsim: Remove the MIPSsim platform.Steven J. Hill
The MIPSsim platform is no longer supported or used. [ralf@linux-mips.org: Also remove mipssim from arch/mips/Kbuild.platforms and delete arch/mips/include/asm/mach-mipssim/*.] Signed-off-by: Steven J. Hill <sjhill@mips.com> Cc: linux-mips@linux-mips.org Patchwork: https://patchwork.linux-mips.org/patch/4350/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2012-09-22MIPS: NOTIFY_RESUME is not needed in TIF masksAl Viro
If it's set, SIGPENDING is also set. And SIGPENDING is present in the masks... Signed-off-by: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2012-09-22MIPS: Merge the identical "return from syscall" per-ABI codeAl Viro
No need to keep 4 copies of that stuff; merged and taken to entry.S, unused public symbols there killed off. Signed-off-by: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2012-09-22MIPS: Unobfuscate _TIF..._MASKAl Viro
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2012-09-22MIPS: Prevent hitting do_notify_resume() with !user_mode(regs).Al Viro
Too late to do anything there... Signed-off-by: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2012-09-17MIPS: Malta: Don't crash on spurious interrupt.Ralf Baechle
48d480b0bde794781fcae9501fb043c1bac0e523 [[MIPS] Malta: Fix off by one bug in interrupt handler.] did not take in account that irq_ffs() will also return 0 if for some reason the set of pending interrupts happens to be empty. This is trivial to trigger with a RM5261 CPU module running a 64-bit kernel and results in something like the following: CPU 0 Unable to handle kernel paging request at virtual address 0000000000000000, epc == ffffffff801772d0, ra == ffffffff8017ad24 Oops[#1]: Cpu 0 $ 0 : 0000000000000000 ffffffff9000a4e0 ffffffff9000a4e0 ffffffff9000a4e0 $ 4 : ffffffff80592be0 0000000000000000 00000000000000d6 ffffffff80322ed0 $ 8 : ffffffff805fe538 0000000000000000 ffffffff9000a4e0 ffffffff80590000 $12 : 00000000000000d6 0000000000000000 ffffffff80600000 ffffffff805fe538 $16 : 0000000000000000 0000000000000010 ffffffff80592be0 0000000000000010 $20 : 0000000000000000 0000000000500001 0000000000000000 ffffffff8051e078 $24 : 0000000000000028 ffffffff803226e8 $28 : 9800000003828000 980000000382b900 ffffffff8051e060 ffffffff8017ad24 Hi : 0000000000000000 Lo : 0000006388974000 epc : ffffffff801772d0 handle_irq_event_percpu+0x70/0x2f0 Not tainted ra : ffffffff8017ad24 handle_percpu_irq+0x54/0x88 Status: 9000a4e2 KX SX UX KERNEL EXL Cause : 00808008 BadVA : 0000000000000000 PrId : 000028a0 (Nevada) Modules linked in: Process init (pid: 1, threadinfo=9800000003828000, task=9800000003827968, tls=0000000077087490) Stack : ffffffff80592be0 ffffffff8058d248 0000000000000040 0000000000000000 ffffffff80613340 0000000000500001 ffffffff805a0000 0000000000000882 9800000003b89000 ffffffff8017ad24 00000000000000d5 0000000000000010 ffffffff9000a4e1 ffffffff801769f4 ffffffff9000a4e0 ffffffff801037f8 0000000000000000 ffffffff80101c44 0000000000000000 ffffffff9000a4e0 0000000000000000 9000000018000000 90000000180003f9 0000000000000001 0000000000000000 00000000000000ff 0000000000000018 0000000000000001 0000000000000001 00000000003fffff 0000000000000020 ffffffff802cf7ac ffffffff80208918 000000007fdadf08 ffffffff80612d88 ffffffff9000a4e1 0000000000000040 0000000000000000 ffffffff80613340 0000000000500001 ... Call Trace: [<ffffffff801772d0>] handle_irq_event_percpu+0x70/0x2f0 [<ffffffff8017ad24>] handle_percpu_irq+0x54/0x88 [<ffffffff801769f4>] generic_handle_irq+0x44/0x60 [<ffffffff801037f8>] do_IRQ+0x48/0x70 [<ffffffff80101c44>] ret_from_irq+0x0/0x4 [<ffffffff80326170>] serial8250_startup+0x310/0x870 [<ffffffff8032175c>] uart_startup.part.7+0x9c/0x330 [<ffffffff80321b4c>] uart_open+0x15c/0x1b0 [<ffffffff80302034>] tty_open+0x1fc/0x720 [<ffffffff801bffac>] chrdev_open+0x7c/0x180 [<ffffffff801b9ab8>] do_dentry_open.isra.14+0x288/0x390 [<ffffffff801bac5c>] nameidata_to_filp+0x5c/0xc0 [<ffffffff801ca700>] do_last.isra.33+0x330/0x8f0 [<ffffffff801caf3c>] path_openat+0xbc/0x440 [<ffffffff801cb3c8>] do_filp_open+0x38/0xa8 [<ffffffff801bade4>] do_sys_open+0x124/0x218 [<ffffffff80110538>] handle_sys+0x118/0x13c Code: 02d5a825 12800012 02a0b02d <de820000> de850008 0040f809 0220202d 0040a82d 40026000 ---[ end trace 5d8e7b9a86badd2d ]--- Kernel panic - not syncing: Fatal exception in interrupt Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2012-09-14MIPS: Malta: Remove RTC Data Mode bootstrap breakageMaciej W. Rozycki
YAMON requires and enforces the RTC Data Mode (Register B, DM bit) to binary, that is the bit is set every time the board goes through the firmware bootstrap sequence. Likewise its calendar manipulation commands interpret or set the RTC registers unconditionally as binary, never actually checking what the value of the DM bit is, under the (correct) assumption that it has been previously set, to indicate the binary mode. A change to Linux a while ago however introduced a platform-specific tweak that clears that bit and therefore forces the data mode to BCD. This causes clock corruption and misinterpretation that has to be fixed up by user-mode tools in system startup scripts as the initial clock is often incorrect according to the BCD interpretation forced. This change removes the hack; a comment included refers to alarm code, but even if it was broken at one point by requiring the BCD mode, it should have been trivially corrected and even if not, given how rarely the alarm feature is used, that was not really a reasonable justification to break the system clock that is indeed used by virtually everything. And either way the alarm code has been since fixed anyway. Signed-off-by: Maciej W. Rozycki <macro@codesourcery.com> Cc: linux-mips@linux-mips.org Patchwork: https://patchwork.linux-mips.org/patch/4336/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2012-09-13MIPS: Replace 'kernel_uses_smartmips_rixi' with 'cpu_has_rixi'.Steven J. Hill
Remove usage of the 'kernel_uses_smartmips_rixi' macro from all files and use new 'cpu_has_rixi' instead. Signed-off-by: Steven J. Hill <sjhill@mips.com> Acked-by: David Daney <david.daney@cavium.com>
2012-09-13MIPS: Add base architecture support for RI and XI.Steven J. Hill
Originally both Read Inhibit (RI) and Execute Inhibit (XI) were supported by the TLB only for a SmartMIPS core. The MIPSr3(TM) Architecture now defines an optional feature to implement these TLB bits separately. Support for one or both features can be checked by looking at the Config3.RXI bit. Signed-off-by: Steven J. Hill <sjhill@mips.com> Acked-by: David Daney <david.daney@cavium.com>
2012-09-13MIPS: Optimise TLB handlers for MIPS32/64 R2 cores.Steven J. Hill
The EXT and INS instructions can be used to decrease code size and thus speed up TLB handlers on MIPS32R2 and MIPS64R2 cores. Signed-off-by: Steven J. Hill <sjhill@mips.com>
2012-09-13MIPS: uasm: Add INS and EXT instructions.Steven J. Hill
These are MIPS32R2 instructions for merging and extracting bit fields from one GPR into another. Signed-off-by: Steven J. Hill <sjhill@mips.com>
2012-09-13MIPS: Avoid pipeline stalls on some MIPS32R2 cores.Steven J. Hill
The architecture specification says that an EHB instruction is needed to avoid a hazard when writing TLB entries. However, some cores do not have this hazard, and thus the EHB instruction causes a costly pipeline stall. Detect these cores and do not use the EHB instruction. Signed-off-by: Steven J. Hill <sjhill@mips.com>
2012-09-13MIPS: Make VPE count to be one-based.Steven J. Hill
When dealing with multiple VPEs, the count needs to be one-based for correct initialization of the GIC. Signed-off-by: Steven J. Hill <sjhill@mips.com>
2012-09-13MIPS: Add new end of interrupt functionality for GIC.Steven J. Hill
Each platform should define its own 'gic_finish_irq' function. Signed-off-by: Steven J. Hill <sjhill@mips.com>
2012-09-13MIPS: Add EIC support for GIC.Steven J. Hill
Add support to use an external interrupt controller with the GIC. Signed-off-by: Steven J. Hill <sjhill@mips.com>
2012-09-13MIPS: Code clean-ups for the GIC.Steven J. Hill
Fix whitespace, beautify the code and remove debug statements. Signed-off-by: Steven J. Hill <sjhill@mips.com>
2012-09-13MIPS: Make GIC code platform independent.Steven J. Hill
The GIC interrupt code is used by multiple platforms and the current code was half Malta dependent code. These changes abstract away the platform specific differences. Signed-off-by: Steven J. Hill <sjhill@mips.com>
2012-09-13MIPS: Changes to configuration files for SEAD-3 platform.Steven J. Hill
Change MIPS configuration files to add the SEAD-3. Also add new default configuration file for a SEAD-3 kernel. Signed-off-by: Steven J. Hill <sjhill@mips.com>
2012-09-13MIPS: Add core files for MIPS SEAD-3 development platform.Steven J. Hill
More information about the SEAD-3 platform can be found at <http://www.mips.com/products/development-kits/mips-sead-3/> on MTI's site. Currently, the M14K family of cores is what the SEAD-3 is utilised with. Signed-off-by: Douglas Leung <douglas@mips.com> Signed-off-by: Chris Dearman <chris@mips.com> Signed-off-by: Steven J. Hill <sjhill@mips.com>
2012-09-13MIPS: Add support for the 1074K core.Steven J. Hill
Signed-off-by: Steven J. Hill <sjhill@mips.com>
2012-09-13MIPS: lantiq: make use of __gpio_to_irqJohn Crispin
The gpio_chip struct allows us to set a .to_irq callback. Once this is set we can rely on the generic __gpio_to_irq() function to map gpio->irq allowing more than one gpio_chip to register an interrupt Signed-off-by: John Crispin <blogic@openwrt.org>
2012-09-13OF: pinctrl: MIPS: lantiq: adds support for FALCON SoCJohn Crispin
Implement support for pinctrl on lantiq/falcon socs. The FALCON has 5 banks of up to 32 pins. Signed-off-by: John Crispin <blogic@openwrt.org> Signed-off-by: Thomas Langer <thomas.langer@lantiq.com> Acked-by: Linus Walleij <linus.walleij@linaro.org> Cc: devicetree-discuss@lists.ozlabs.org Cc: linux-kernel@vger.kernel.org
2012-09-13OF: pinctrl: MIPS: lantiq: implement lantiq/xway pinctrl supportJohn Crispin
Implement support for pinctrl on lantiq/xway socs. The IO core found on these socs has the registers for pinctrl, pinconf and gpio mixed up in the same register range. As the gpio_chip handling is only a few lines, the driver also implements the gpio functionality. This obseletes the old gpio driver that was located in the arch/ folder. Signed-off-by: John Crispin <blogic@openwrt.org> Acked-by: Linus Walleij <linus.walleij@linaro.org> Cc: devicetree-discuss@lists.ozlabs.org Cc: linux-kernel@vger.kernel.org
2012-08-31MIPS: Octeon: Add octeon_io_clk_delay() function.David Daney
Also cleanup and fix octeon_init_cvmcount() Signed-off-by: David Daney <ddaney@caviumnetworks.com> Acked-by: David S. Miller <davem@davemloft.net>
2012-08-31MIPS: OCTEON: Register ciu/ciu2 as the default irq_domain.David Daney
This makes it possible to call irq_create_mapping(NULL, ??) Signed-off-by: David Daney <david.daney@cavium.com>
2012-08-31MIPS: Octeon: Make interrupt controller work with threaded handlers.David Daney
For CIUv1 controllers, we were relying on all calls to the irq_chip functions to be done from the CPU that received the irq, and that they would all be done from interrupt contest. These assumptions do not hold for threaded handlers. We make all the masking actually mask the irq source, and use real raw_spin_locks instead of manually twiddling the Status[IE] bit. Signed-off-by: David Daney <david.daney@cavium.com>
2012-08-31MIPS: OCTEON: Add support for cn68XX interrupt controller.David Daney
The cn68XX has a new interrupt controller named CIU2, add support for this, and use it if cn68XX detected at runtime. Signed-off-by: David Daney <david.daney@cavium.com>
2012-08-31MIPS: OCTEON: Add OCTEON_IRQ_* definitions for cn68XX chips.David Daney
There are 64 workqueue, 32 watchdog, and 4 mbox. Signed-off-by: David Daney <david.daney@cavium.com>
2012-08-31MIPS: OCTEON: Update register definitions.David Daney
Add support for cn68xx, cn61xx, cn63xx, cn66xx and cnf71XX. Add little-endian register layouts. Patch cvmx-interrupt-rsl.c for changed definition. Signed-off-by: David Daney <david.daney@cavium.com>
2012-08-31MIPS: OCTEON: Add detection of cnf71xx parts.David Daney
Also add cvmx_get_octeon_family(). Both of these are needed by the upcoming register definition refresh patch. Signed-off-by: David Daney <david.daney@cavium.com>
2012-08-30MIPS: BCM63XX: Create platform_device for USBDKevin Cernekee
Signed-off-by: Kevin Cernekee <cernekee@gmail.com> Reviewed-by: Jonas Gorski <jonas.gorski@gmail.com> Patchwork: http://patchwork.linux-mips.org/patch/4111/ Signed-off-by: John Crispin <blogic@openwrt.org>
2012-08-30MIPS: BCM63XX: Add register and IRQ definitions for USB 2.0 deviceKevin Cernekee
Signed-off-by: Kevin Cernekee <cernekee@gmail.com> Patchwork: http://patchwork.linux-mips.org/patch/4084/ Signed-off-by: John Crispin <blogic@openwrt.org>
2012-08-30MIPS: BCM63XX: Fix USB IRQ definitions for 6328Kevin Cernekee
OHCI/EHCI are in the high (second) word. Not currently used by any driver. Signed-off-by: Kevin Cernekee <cernekee@gmail.com> Patchwork: http://patchwork.linux-mips.org/patch/4026/ Signed-off-by: John Crispin <blogic@openwrt.org>
2012-08-30MIPS: BCM63XX: Add register definitions for USBD dependenciesKevin Cernekee
The USB 2.0 device depends on some functionality in other blocks, such as GPIO and USBH. Add those register definitions here. Signed-off-by: Kevin Cernekee <cernekee@gmail.com> Patchwork: http://patchwork.linux-mips.org/patch/4025/ Signed-off-by: John Crispin <blogic@openwrt.org>
2012-08-30MIPS: BCM63XX: Add new IUDMA definitions needed for USBDKevin Cernekee
Signed-off-by: Kevin Cernekee <cernekee@gmail.com> Patchwork: http://patchwork.linux-mips.org/patch/4083/ Signed-off-by: John Crispin <blogic@openwrt.org>
2012-08-30MIPS: BCM63XX: Move DMA descriptor definition into common header fileKevin Cernekee
The "IUDMA" engine used by bcm63xx_enet is also used by other blocks, such as the USB 2.0 device. Move the definitions into a common file so that they do not need to be duplicated in each driver. Signed-off-by: Kevin Cernekee <cernekee@gmail.com> Patchwork: http://patchwork.linux-mips.org/patch/4082/ Signed-off-by: John Crispin <blogic@openwrt.org>
2012-08-30MIPS: BCM63XX: Expose the USBH/USBD clocks on BCM6328/BCM6368Kevin Cernekee
Signed-off-by: Kevin Cernekee <cernekee@gmail.com> Patchwork: http://patchwork.linux-mips.org/patch/4022/ Signed-off-by: John Crispin <blogic@openwrt.org>
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