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* [ARM] 3225/1: add symbolic names for enp2611 gpio interruptsLennert Buytenhek2006-01-041-0/+6
| | | | | | | | | | Patch from Lennert Buytenhek Add symbolic names for the five ixp2400 GPIO lines on the enp2611 that are used as interrupts. Signed-off-by: Lennert Buytenhek <buytenh@wantstofly.org> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
* [ARM] 3224/1: add masked thread interrupt status registers for ixp2000Lennert Buytenhek2006-01-041-0/+8
| | | | | | | | | | | | | Patch from Lennert Buytenhek In its interrupt handler, the (NAPI) ixp2000 netdev driver needs to use the masked thread interrupt status register (instead of the raw one) to prevent scheduling polling when polling is already running when a TXdone interrupt comes in. The definitions for the masked status registers were not in yet, so this patch adds them. Signed-off-by: Lennert Buytenhek <buytenh@wantstofly.org> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
* [ARM] 3223/1: remove ixdp2x01 cs89x0 hackLennert Buytenhek2006-01-041-98/+0
| | | | | | | | | | | | | Patch from Lennert Buytenhek Remove the ixdp2x01 cs89x0 hack from ixp2000's io implementation. Since the cs89x0 driver has been made properly aware of the odd way the cs89x0 is hooked up on the ixdp2x01, we don't need this hack anymore. Signed-off-by: Lennert Buytenhek <buytenh@wantstofly.org> Signed-off-by: Deepak Saxena <dsaxena@plexity.net> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
* [ARM] Remove definition of MAX_DMA_CHANNELS to zeroRussell King2006-01-041-7/+0
| | | | | | | | | Since we now only build arch/arm/kernel/dma.c on machine types which set ISA_DMA_API, we don't need to define MAX_DMA_CHANNELS to 0 to indicate this - this definition becomes superfluous. Remove it. Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
* [ARM] Move common definition of MAX_DMA_ADDRESS to asm/dma.hRussell King2006-01-041-2/+0
| | | | Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
* [ARM] Cleanup ARM includesRussell King2006-01-031-0/+1
| | | | | | | | | | | | | | | | arch/arm/kernel/entry-armv.S has contained a comment suggesting that asm/hardware.h and asm/arch/irqs.h should be moved into the asm/arch/entry-macro.S include. So move the includes to these two files as required. Add missing includes (asm/hardware.h, asm/io.h) to asm/arch/system.h includes which use those facilities, and remove asm/io.h from kernel/process.c. Remove other unnecessary includes from arch/arm/kernel, arch/arm/mm and arch/arm/mach-footbridge. Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
* [ARM] 3086/1: ixp2xxx error irq handlingDave Jiang2005-11-041-1/+34
| | | | | | | | | | | | Patch from Dave Jiang This provides support for IXP2xxx error interrupt handling. Previously there was a patch to remove this (although the original stuff was broken). Well, now the error bits are needed again. These are used extensively by the micro-engine drivers according to Deepak and also we will need it for the new EDAC code that Alan Cox is trying to push into the main kernel. Re-submit of 3072/1, generated against git tree pulled today. AFAICT, this git tree pulled in all the ARM changes that's in arm.diff. Please let me know if there are additional changes. Thx! Signed-off-by: Dave Jiang <djiang@mvista.com> Signed-off-by: Deepak Saxena <dsaxena@plexity.net> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
* [ARM] 3052/1: add ixp2000 microcode loaderLennert Buytenhek2005-11-012-2/+65
| | | | | | | | | | | | | | | | | | | | Patch from Lennert Buytenhek This patch adds a microcode loader for the ixp2000 architecture. The ixp2000 is an xscale-based CPU with a number of additional small CPUs ('microengines') on die that can be programmed to do various things. Depending on the ixp2000 model, there are between 2 and 16 microengines. This code provides an API that allows configuring the microengines, loading code into them, and starting and stopping them and reading out a number of status registers, and is used by the microengine network driver that was recently announced to netdev. Signed-off-by: Lennert Buytenhek <buytenh@wantstofly.org> Signed-off-by: Deepak Saxena <dsaxena@plexity.net> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
* [ARM] 3065/1: ixp2000 typo and whitespace fixesLennert Buytenhek2005-11-011-1/+1
| | | | | | | | | | Patch from Lennert Buytenhek Misc ixp2000 typo and whitespace fixes. Signed-off-by: Lennert Buytenhek <buytenh@wantstofly.org> Signed-off-by: Deepak Saxena <dsaxena@plexity.net> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
* [ARM] 3064/1: start using ixp2000_reg_wrbLennert Buytenhek2005-11-011-8/+9
| | | | | | | | | | | | | | | | | Patch from Lennert Buytenhek Switch the users of ixp2000_reg_write that depend on writes being flushed out of the write buffer by the time that function returns over to ixp2000_reg_wrb. When using XCB=101, writes to the same functional unit are still guaranteed to complete in order, so we only need to protect against: - reordering of writes to different functional units - masking an interrupt and then reenabling the IRQ bit in CPSR Signed-off-by: Lennert Buytenhek <buytenh@wantstofly.org> Signed-off-by: Deepak Saxena <dsaxena@plexity.net> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
* [ARM] 3063/1: allow slave ixp2000 cpu resetLennert Buytenhek2005-11-011-7/+1
| | | | | | | | | | | | | | | Patch from Lennert Buytenhek On the ixdp2x00, the slave CPU is currently not allowed to reset itself for fear that it will do something 'funky' on the PCI bus. This fear is ungrounded -- the slave CPU is wired up such that a CPU reset will not cause a PCI bus reset to be done. This patch changes arch_reset() so that the slave CPU also executes the reset sequence, allowing it to reboot itself using /sbin/reboot. Signed-off-by: Lennert Buytenhek <buytenh@wantstofly.org> Signed-off-by: Deepak Saxena <dsaxena@plexity.net> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
* [ARM] 3062/1: map in various enp2611 peripherals for the ixp2000 netdev driverLennert Buytenhek2005-11-011-2/+14
| | | | | | | | | | | | | | | Patch from Lennert Buytenhek The enp2611 version of the ixp2000 netdev driver needs to be able to access a number of on-board peripherals. ioremap() is not suitable for this, as that will cause XCB=000 mappings to be done, which will make the cpu susceptible to crashing on ixp2400 erratum #66. Properly aligned iotable mappings with MT_IXP2000_DEVICE will cause section mappings with XCB=101 to be done, which is safe. Signed-off-by: Lennert Buytenhek <buytenh@wantstofly.org> Signed-off-by: Deepak Saxena <dsaxena@plexity.net> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
* [ARM] fix bogus cast in IXP2000 I/O macroDeepak Saxena2005-10-301-1/+1
| | | | | | | | | Physical addresses are not valid pointers of any sort and should not be cast to such. Signed-off-by: Deepak Saxena <dsaxena@plexity.net> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
* [ARM] 3060/1: allow constants found in asm/memory.h to be used in asm codeNicolas Pitre2005-10-291-1/+1
| | | | | | | | | | | | Patch from Nicolas Pitre This patch allows for assorted type of cleanups by letting assembly code use the same set of defines for constant values and avoid duplicated definitions that might not always be in sync, or that might simply be confusing due to the different names for the same thing. Signed-off-by: Nicolas Pitre <nico@cam.org> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
* [ARM] 3053/1: introduce ixp2000_reg_wrb (ixp2000_reg_write plus readback)Lennert Buytenhek2005-10-291-0/+25
| | | | | | | | | | | | | | | | | Patch from Lennert Buytenhek Introduce ixp2000_reg_wrb, which is a variant of ixp2000_reg_write that does a readback from the target register, to make sure that the write has been flushed out of the write buffer. Unlike the previous (ineffective) readback in ixp2000_reg_write, this readback is followed by an instruction that depends on the value of the readback so that the CPU actually stalls until the readback has completed. Signed-off-by: Lennert Buytenhek <buytenh@wantstofly.org> Signed-off-by: Deepak Saxena <dsaxena@plexity.net> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
* [ARM] 3051/1: turn ixp2000_reg_read into an inline functionLennert Buytenhek2005-10-291-1/+5
| | | | | | | | | | Patch from Lennert Buytenhek Turn ixp2000_reg_read into an inline function. Signed-off-by: Lennert Buytenhek <buytenh@wantstofly.org> Signed-off-by: Deepak Saxena <dsaxena@plexity.net> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
* [ARM] 3050/1: remove ixp2000_reg_write erratum #66 workaroundLennert Buytenhek2005-10-291-29/+0
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Patch from Lennert Buytenhek The workaround that we do for avoiding triggering ixp2400 erratum #66 involves mapping I/O pages using XCB=101 instead of XCB=000 so that we prevent the I/O signal to the gasket from being asserted (which can cause data corruption.) But XCB=101 mappings are write-buffered while mappings using XCB=000 are not, which is why if we use XCB=101 mappings we do a readback for every CSR store in an attempt to make sure that the store has been pushed out of the xscale core and the gasket. Unfortunately, there are two issues with this: - we do a readback for every CSR store, which is wrong, because the register we are writing to might have unwanted side-effects on read, for example, in the case of the scratchpad ring enqueue/dequeue registers; and - the readback is totally ineffective in the way we currently do it, because we just issue a load but do not issue any instruction that depends on the return value of that load, so the xscale core does not wait for the load to complete before continuing. See this linux-arm-kernel mailing list post for further information: http://lists.arm.linux.org.uk/pipermail/linux-arm-kernel/2005-September/031314.html This means that my ixp2400 boxes have been running for many months without a working readback in ixp2000_reg_write, without any apparent adverse effects. Two of them have been running for a week now with the actual readback deleted from ixp2000_reg_write, also without any apparent ill effects. So, because in its current form it does more harm than good, the readback in ixp2000_reg_write should simply be killed, as the patch below does. Signed-off-by: Lennert Buytenhek <buytenh@wantstofly.org> Signed-off-by: Deepak Saxena <dsaxena@plexity.net> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
* [ARM] 2908/1: add register definitions for ixp2000 msfLennert Buytenhek2005-10-281-0/+43
| | | | | | | | | | | Patch from Lennert Buytenhek We already had a mapping for the msf, but we didn't have any register definitions for it yet. Signed-off-by: Lennert Buytenhek <buytenh@wantstofly.org> Signed-off-by: Deepak Saxena <dsaxena@plexity.net> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
* [ARM] 1/4: Move include of asm/hardware.h to asm-arm/arch-*/io.hRussell King2005-10-281-0/+2
| | | | | | | Including asm/hardware.h into asm/io.h can cause #define clashes between platform specific definitions and driver local definitions. Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
* [ARM] 2909/1: remove IXP2000_PROD_IDLennert Buytenhek2005-09-152-3/+1
| | | | | | | | | | | | Patch from Lennert Buytenhek The intel docs call it IXP2000_PRODUCT_ID, and we have a definition for IXP2000_PRODUCT_ID as well, so IXP2000_PROD_ID can go. It's only used in one place. Signed-off-by: Lennert Buytenhek <buytenh@wantstofly.org> Signed-off-by: Deepak Saxena <dsaxena@plexity.net> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
* [ARM] 2911/1: ixp2000_reg_{read,write} accessorsLennert Buytenhek2005-09-151-5/+9
| | | | | | | | | | | | | | | | | | | | | | | | | | Patch from Lennert Buytenhek This patch: - changes the ixp2000_reg_write accessor to take a 'volatile void *' instead of a 'volatile unsigned long *', which then allows passing in a u32 * as first argument without being greeted with a warning; and - adds an ixp2000_reg_read accessor. We can then use these accessors in ixp2000 code to access on-chip peripherals, instead of directly dereferencing pointers. This is for use by the ixp2000 microengine driver which was recently announced on netdev. We can't use readl/writel on the ixp2000 since it is usually run in big-endian mode, and on big-endian platforms, readl/writel perform byteswapping. A future patch will remove the readback from ixp2000_reg_write, since it's not needed to prevent erratum #66, and add manual readbacks to the places that need them (writes are not synchronous since we map in device space using XCB=101 nowadays), such as interrupt disabling and GPIO manipulation. See also: http://lists.arm.linux.org.uk/pipermail/linux-arm-kernel/2005-February/027084.html Patch has been ACKed by Jeff Garzik. Signed-off-by: Lennert Buytenhek <buytenh@wantstofly.org> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
* [PATCH] ARM: 2793/1: platform serial support for ixp2000Lennert Buytenhek2005-07-101-0/+1
| | | | | | | | | | | Patch from Lennert Buytenhek This patch converts the ixp2000 serial port over to a platform serial device. Signed-off-by: Lennert Buytenhek <buytenh@wantstofly.org> Signed-off-by: Deepak Saxena <dsaxena@plexity.net> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
* [PATCH] ARM: 2756/1: add ixp2000 msf mappingLennert Buytenhek2005-06-261-0/+4
| | | | | | | | | | | | Patch from Lennert Buytenhek Add a mapping for the ixp2400 and ixp2800 msf unit. The msf is the ixp2000's 'media and switch fabric' unit, which handles the networking part of the chip. Signed-off-by: Lennert Buytenhek <buytenh@wantstofly.org> Signed-off-by: Deepak Saxena Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
* [PATCH] ARM: 2755/1: describe ixp2000 virtual memory map layoutLennert Buytenhek2005-06-261-0/+15
| | | | | | | | | | | Patch from Lennert Buytenhek Add a comment to asm/arch-ixp2000/ixp2000-regs.h describing the ixp2000 virtual memory map layout. Signed-off-by: Lennert Buytenhek <buytenh@wantstofly.org> Signed-off-by: Deepak Saxena Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
* [PATCH] ARM: 2754/1: move ixp2000 VMALLOC_END upLennert Buytenhek2005-06-261-1/+1
| | | | | | | | | | | | Patch from Lennert Buytenhek As the ixdp cpld mappings now live at 0xfe000000, we can push VMALLOC_END upwards to 0xfb000000, where the first iotable mapping begins. Signed-off-by: Lennert Buytenhek <buytenh@wantstofly.org> Signed-off-by: Deepak Saxena Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
* [PATCH] ARM: 2753/1: move ixdp* cpld mappingsLennert Buytenhek2005-06-262-4/+4
| | | | | | | | | | | | | | | | | Patch from Lennert Buytenhek All ixdp platforms currently have a cpld mapped in at 0xfafff000. Since this address is not 1M-aligned, a regular page mapping will be used instead of a section mapping, which opens up the possibility of triggering ixp2400 erratum #66 as we only do the XCB=101 workaround thing for section mappings. There is still a lot of space higher up in the virtual memory map for 1M mappings, so move the cpld mapping to 0xfe000000 and make it 1M big so that a section mapping will be used for it. Signed-off-by: Lennert Buytenhek <buytenh@wantstofly.org> Signed-off-by: Deepak Saxena Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
* [PATCH] ARM: 2752/1: disable ixp2000 PCI I/O software workaround on chips ↵Lennert Buytenhek2005-06-252-7/+15
| | | | | | | | | | | | | | | | that don't need it Patch from Lennert Buytenhek The later ixp2000 models don't need the PCI I/O workaround that we currently perform. Add a config option to disable the workaround, and panic on boot if a kernel without the workaround is booted on a buggy chip. As only pre-production ixp2000s need the workaround, the default is for it not to be configured in. Signed-off-by: Lennert Buytenhek <buytenh@wantstofly.org> Signed-off-by: Deepak Saxena Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
* [PATCH] ARM: 2748/1: ixp2000 implementation of the iomap apiLennert Buytenhek2005-06-241-0/+72
| | | | | | | | | | | | | Patch from Lennert Buytenhek A number of ixp2000 models have a bug where the byte lanes for PCI I/O transactions are swapped. We already work around this in our versions of {in,out}{b,w,l}, but we also need to perform these workarounds in a custom implementation of the new iomap API, provided in this patch. Signed-off-by: Lennert Buytenhek <buytenh@wantstofly.org> Signed-off-by: Deepak Saxena Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
* [PATCH] ARM: 2744/1: ixp2000 gpio irq supportLennert Buytenhek2005-06-242-40/+13
| | | | | | | | | | | | | Patch from Lennert Buytenhek This patch cleans up the ixp2000 gpio irq code and implements the set_irq_type method for gpio irqs so that users can select for which events (falling edge/rising edge/level low/level high) on the gpio pin they want the corresponding gpio irq to be triggered. Signed-off-by: Lennert Buytenhek <buytenh@wantstofly.org> Signed-off-by: Deepak Saxena Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
* [PATCH] ARM: 2740/1: ixp2000 align{b,w} need to parenthesize their argumentsLennert Buytenhek2005-06-241-2/+2
| | | | | | | | | | | Patch from Lennert Buytenhek Two macros that are used on the ixp2000 to fixup byte lane enables for I/O space accesses, align{b,w}, use their arguments without parenthesizing them. Signed-off-by: Lennert Buytenhek <buytenh@wantstofly.org> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
* [PATCH] ARM: 2701/1: free up ixp2000 timer 4 for the watchdogLennert Buytenhek2005-06-201-0/+1
| | | | | | | | | | | | | | | | | | | | | | | | Patch from Lennert Buytenhek The IXP2000 has four timers, but if we're on an A-step IXP2800, timer 2 and 3 don't work. We need two timers for timekeeping (one for the timer interrupt and one for tracking missed jiffies), so on early IXP2800s we have no other choice but to use timer 1 and 4 for that, but on all other IXP2000s we'd rather leave timer 4 free since that's the only timer we can use for the watchdog. So, on buggy IXP2000s (i.e. the A-step IXP2800) we use timer 4 for tracking missed jiffies, and on all all non-buggy IXP2000s (i.e. everything but the A-step IXP2800) we use timer 2. On a pre-production IXP2800, this patch should print these messages on boot: Enabling IXP2800 erratum #25 workaround Unable to use IXP2000 watchdog due to IXP2800 erratum #25 On any non-buggy IXP2800 (as well as on IXP2400s) you shouldn't see anything at all, and the watchdog should be usable again. Signed-off-by: Lennert Buytenhek Signed-off-by: Deepak Saxena Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
* [PATCH] ARM: 2692/1: Fix compile warnings in include/asm-arm/arch-ixp2000/io.hDeepak Saxena2005-06-031-8/+8
| | | | | | | | | | | | | | | | | | | | | | Patch from Deepak Saxena This patch fixes the following warnings: include/asm/arch/io.h: In function `insw': include/asm/arch/io.h:78: warning: comparison of distinct pointer types lacks acast include/asm/arch/io.h:79: warning: comparison of distinct pointer types lacks acast include/asm/arch/io.h: In function `outsw': include/asm/arch/io.h:103: warning: comparison of distinct pointer types lacks a cast include/asm/arch/io.h:104: warning: comparison of distinct pointer types lacks a cast include/asm/arch/io.h: In function `inw': include/asm/arch/io.h:127: warning: comparison of distinct pointer types lacks a cast Signed-off-by: Deepak Saxena Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
* [PATCH] ARM: cleanup vmalloc start/offset macrosRussell King2005-05-031-3/+0
| | | | | | | | VMALLOC_START and VMALLOC_OFFSET are common between all ARM machine classes. Move them into include/asm-arm/pgtable.h, but allow a machine class to override them if required. Signed-off-by: Russell King <rmk@arm.linux.org.uk>
* [PATCH] ARM: 2657/1: export ixp2000_pci_config_addrLennert Buytenhek2005-04-291-0/+1
| | | | | | | | | | | Patch from Lennert Buytenhek Export ixp2000_pci_config_addr, to be used by the IXDP2800 platform setup code to coordinate booting the master and slave NPU. Signed-off-by: Lennert Buytenhek Signed-off-by: Deepak Saxena Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
* Linux-2.6.12-rc2v2.6.12-rc2Linus Torvalds2005-04-1619-0/+1447
Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
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