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path: root/drivers/dma/pch_dma.c
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2013-04-15pch_dma: Use GFP_ATOMIC because called from interrupt contextTomoya MORINAGA
pdc_desc_get() is called from pd_prep_slave_sg, and the function is called from interrupt context(e.g. Uart driver "pch_uart.c"). In fact, I saw kernel error message. So, GFP_ATOMIC must be used not GFP_NOIO. Signed-off-by: Tomoya MORINAGA <tomoya.rohm@gmail.com> Signed-off-by: Vinod Koul <vinod.koul@intel.com>
2013-02-26Merge branch 'next' of git://git.infradead.org/users/vkoul/slave-dmaLinus Torvalds
Pull slave-dmaengine updates from Vinod Koul: "This is fairly big pull by my standards as I had missed last merge window. So we have the support for device tree for slave-dmaengine, large updates to dw_dmac driver from Andy for reusing on different architectures. Along with this we have fixes on bunch of the drivers" Fix up trivial conflicts, usually due to #include line movement next to each other. * 'next' of git://git.infradead.org/users/vkoul/slave-dma: (111 commits) Revert "ARM: SPEAr13xx: Pass DW DMAC platform data from DT" ARM: dts: pl330: Add #dma-cells for generic dma binding support DMA: PL330: Register the DMA controller with the generic DMA helpers DMA: PL330: Add xlate function DMA: PL330: Add new pl330 filter for DT case. dma: tegra20-apb-dma: remove unnecessary assignment edma: do not waste memory for dma_mask dma: coh901318: set residue only if dma is in progress dma: coh901318: avoid unbalanced locking dmaengine.h: remove redundant else keyword dma: of-dma: protect list write operation by spin_lock dmaengine: ste_dma40: do not remove descriptors for cyclic transfers dma: of-dma.c: fix memory leakage dw_dmac: apply default dma_mask if needed dmaengine: ioat - fix spare sparse complain dmaengine: move drivers/of/dma.c -> drivers/dma/of-dma.c ioatdma: fix race between updating ioat->head and IOAT_COMPLETION_PENDING dw_dmac: add support for Lynxpoint DMA controllers dw_dmac: return proper residue value dw_dmac: fill individual length of descriptor ...
2013-01-06pch_dma: use module_pci_driver to simplify the codeWei Yongjun
Use the module_pci_driver() macro to make the code simpler by eliminating module_init and module_exit calls. dpatch engine is used to auto generate this patch. (https://github.com/weiyj/dpatch) Signed-off-by: Wei Yongjun <yongjun_wei@trendmicro.com.cn> Signed-off-by: Vinod Koul <vinod.koul@linux.intel.com>
2013-01-03Drivers: dma: remove __dev* attributes.Greg Kroah-Hartman
CONFIG_HOTPLUG is going away as an option. As a result, the __dev* markings need to be removed. This change removes the use of __devinit, __devexit_p, __devinitconst, and __devexit from these drivers. Based on patches originally written by Bill Pemberton, but redone by me in order to handle some of the coding style issues better, by hand. Cc: Bill Pemberton <wfp5p@virginia.edu> Cc: Viresh Kumar <viresh.linux@gmail.com> Cc: Dan Williams <djbw@fb.com> Cc: Vinod Koul <vinod.koul@intel.com> Cc: Barry Song <baohua.song@csr.com> Cc: Jeff Kirsher <jeffrey.t.kirsher@intel.com> Cc: Alexander Duyck <alexander.h.duyck@intel.com> Cc: Russell King <rmk+kernel@arm.linux.org.uk> Cc: Linus Walleij <linus.walleij@linaro.org> Cc: Jassi Brar <jassisinghbrar@gmail.com> Cc: Dave Jiang <dave.jiang@intel.com> Cc: Bill Pemberton <wfp5p@virginia.edu> Cc: Guennadi Liakhovetski <g.liakhovetski@gmx.de> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2012-11-28dma: remove use of __devinitBill Pemberton
CONFIG_HOTPLUG is going away as an option so __devinit is no longer needed. Signed-off-by: Bill Pemberton <wfp5p@virginia.edu> Cc: Li Yang <leoli@freescale.com> Cc: Zhang Wei <zw@zh-kernel.org> Cc: Barry Song <baohua.song@csr.com> Acked-by: Viresh Kumar <viresh.kumar@linaro.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2012-11-28dma: remove use of __devexit_pBill Pemberton
CONFIG_HOTPLUG is going away as an option so __devexit_p is no longer needed. Signed-off-by: Bill Pemberton <wfp5p@virginia.edu> Acked-by: Barry Song <baohua.song@csr.com> Acked-by: Viresh Kumar <viresh.kumar@linaro.org> Acked-by: Russell King <rmk+kernel@arm.linux.org.uk> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2012-05-11dmaengine: Use sg_dma_address instead of sg_physLars-Peter Clausen
dmaengine drivers should always use sg_dma_address instead of sg_phys to get the addresses for the transfer from a sg element. To quote Russel King: sg_phys(sg) of course has nothing to do with DMA addresses. It's the physical address _to the CPU_ of the memory associated with the scatterlist entry. That may, or may not have the same value for the DMA engine, particularly if IOMMUs are involved. And if these drivers are used on ARM, they must be fixed, sooner rather than later. There's patches in the works which will mean we will end up with IOMMU support in the DMA mapping later, which means everything I've said above will become reality. The patch has been generated using the following coccinelle patch: <smpl> @@ struct scatterlist *sg; @@ -sg_phys(sg) +sg_dma_address(sg) </smpl> Signed-off-by: Lars-Peter Clausen <lars@metafoo.de> Acked-by: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Vinod Koul <vinod.koul@linux.intel.com>
2012-03-21dmaengine: add context parameter to prep_slave_sg and prep_dma_cyclicAlexandre Bounine
Add context parameter to device_prep_slave_sg() and device_prep_dma_cyclic() interfaces to allow passing client/target specific information associated with the data transfer. Modify all affected DMA engine drivers. Signed-off-by: Alexandre Bounine <alexandre.bounine@idt.com> Acked-by: Linus Walleij <linus.walleij@linaro.org> Acked-by: Felipe Balbi <balbi@ti.com> Signed-off-by: Vinod Koul <vinod.koul@linux.intel.com>
2012-03-13dmaengine: consolidate initialization of cookiesRussell King - ARM Linux
Provide a common function to initialize a channels cookie values. Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk> Tested-by: Linus Walleij <linus.walleij@linaro.org> Reviewed-by: Linus Walleij <linus.walleij@linaro.org> Acked-by: Jassi Brar <jassisinghbrar@gmail.com> [imx-sdma.c & mxs-dma.c] Tested-by: Shawn Guo <shawn.guo@linaro.org> Signed-off-by: Vinod Koul <vinod.koul@linux.intel.com>
2012-03-13dmaengine: consolidate tx_status functionsRussell King - ARM Linux
Now that we have the completed cookie in the dma_chan structure, we can consolidate the tx_status functions by providing a function to set the txstate structure and returning the DMA status. We also provide a separate helper to set the residue for cookies which are still in progress. Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk> Tested-by: Linus Walleij <linus.walleij@linaro.org> Reviewed-by: Linus Walleij <linus.walleij@linaro.org> Acked-by: Jassi Brar <jassisinghbrar@gmail.com> [imx-sdma.c & mxs-dma.c] Tested-by: Shawn Guo <shawn.guo@linaro.org> Signed-off-by: Vinod Koul <vinod.koul@linux.intel.com>
2012-03-13dmaengine: consolidate assignment of DMA cookiesRussell King - ARM Linux
Everyone deals with assigning DMA cookies in the same way (it's part of the API so they should be), so lets consolidate the common code into a helper function to avoid this duplication. Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk> Tested-by: Linus Walleij <linus.walleij@linaro.org> Reviewed-by: Linus Walleij <linus.walleij@linaro.org> Acked-by: Jassi Brar <jassisinghbrar@gmail.com> [imx-sdma.c & mxs-dma.c] Tested-by: Shawn Guo <shawn.guo@linaro.org> Signed-off-by: Vinod Koul <vinod.koul@linux.intel.com>
2012-03-13dmaengine: add private header fileRussell King - ARM Linux
Add a local private header file to contain definitions and declarations which should only be used by DMA engine drivers. We also fix linux/dmaengine.h to use LINUX_DMAENGINE_H to guard against multiple inclusion. Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk> Tested-by: Linus Walleij <linus.walleij@linaro.org> Reviewed-by: Linus Walleij <linus.walleij@linaro.org> Acked-by: Jassi Brar <jassisinghbrar@gmail.com> [imx-sdma.c & mxs-dma.c] Tested-by: Shawn Guo <shawn.guo@linaro.org> Signed-off-by: Vinod Koul <vinod.koul@linux.intel.com>
2012-03-13dmaengine: move last completed cookie into generic dma_chan structureRussell King - ARM Linux
Every DMA engine implementation declares a last completed dma cookie in their private dma channel structures. This is pointless, and forces driver specific code. Move this out into the common dma_chan structure. Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk> Tested-by: Linus Walleij <linus.walleij@linaro.org> Reviewed-by: Linus Walleij <linus.walleij@linaro.org> Acked-by: Jassi Brar <jassisinghbrar@gmail.com> [imx-sdma.c & mxs-dma.c] Tested-by: Shawn Guo <shawn.guo@linaro.org> Signed-off-by: Vinod Koul <vinod.koul@linux.intel.com>
2011-11-17Merge branch 'dma_slave_direction' into next_test_dirnVinod Koul
resolved conflicts: drivers/media/video/mx3_camera.c
2011-11-17pch_dma: Support new device LAPIS Semiconductor ML7831 IOHTomoya MORINAGA
ML7831 is companion chip for Intel Atom E6xx series. Signed-off-by: Tomoya MORINAGA <tomoya.rohm@gmail.com> Signed-off-by: Vinod Koul <vinod.koul@linux.intel.com>
2011-11-17pch_dma: Change company name OKI SEMICONDUCTOR to LAPIS SemiconductorTomoya MORINAGA
On October 1 in 2011, OKI SEMICONDUCTOR Co., Ltd. changed the company name in to LAPIS Semiconductor Co., Ltd. Signed-off-by: Tomoya MORINAGA <tomoya.rohm@gmail.com> Signed-off-by: Vinod Koul <vinod.koul@linux.intel.com>
2011-10-27dmaengine: move drivers to dma_transfer_directionVinod Koul
fixup usage of dma direction by introducing dma_transfer_direction, this patch moves dma/drivers/* to use new enum Cc: Jassi Brar <jaswinder.singh@linaro.org> Cc: Russell King <rmk+kernel@arm.linux.org.uk> Cc: Viresh Kumar <viresh.kumar@st.com> Cc: Linus Walleij <linus.walleij@linaro.org> Cc: Nicolas Ferre <nicolas.ferre@atmel.com> Cc: Mika Westerberg <mika.westerberg@iki.fi> Cc: H Hartley Sweeten <hartleys@visionengravers.com> Cc: Li Yang <leoli@freescale.com> Cc: Zhang Wei <zw@zh-kernel.org> Cc: Sascha Hauer <s.hauer@pengutronix.de> Cc: Guennadi Liakhovetski <g.liakhovetski@gmx.de> Cc: Shawn Guo <shawn.guo@freescale.com> Cc: Yong Wang <yong.y.wang@intel.com> Cc: Tomoya MORINAGA <tomoya-linux@dsn.lapis-semi.com> Cc: Boojin Kim <boojin.kim@samsung.com> Cc: Barry Song <Baohua.Song@csr.com> Acked-by: Mika Westerberg <mika.westerberg@iki.fi> Acked-by: Linus Walleij <linus.walleij@linaro.org> Acked-by: Viresh Kumar <viresh.kumar@st.com> Acked-by: Nicolas Ferre <nicolas.ferre@atmel.com> Signed-off-by: Vinod Koul <vinod.koul@linux.intel.com>
2011-10-12pch_dma: Reduce wasting memoryTomoya MORINAGA
nr_channels is defined in "struct pch_dma". and struct pch_dma_chan is defined in "struct pch_dma". So, "sizeof(struct pch_dma_chan) * nr_channels" is unnecessary. Signed-off-by: Tomoya MORINAGA <tomoya-linux@dsn.lapis-semi.com> Signed-off-by: Vinod Koul <vinod.koul@linux.intel.com>
2011-10-11pch_dma: Fix suspend issueTomoya MORINAGA
Currently, executing suspend/hibernation, memory access violation occurs. In pch_dma_save_regs() called by suspend(), you can see the following code. static void pch_dma_save_regs(struct pch_dma *pd) { snip... list_for_each_entry_safe(chan, _c, &pd->dma.channels, device_node) { pd_chan = to_pd_chan(chan); pd->ch_regs[i].dev_addr = channel_readl(pd_chan, DEV_ADDR); pd->ch_regs[i].mem_addr = channel_readl(pd_chan, MEM_ADDR); pd->ch_regs[i].size = channel_readl(pd_chan, SIZE); pd->ch_regs[i].next = channel_readl(pd_chan, NEXT); i++; } } Max loop count is 12 defined at pci_table. So, this caused memory access violation. This patch fixes the issue - Modify array size (MAX_CHAN_NR) Signed-off-by: Tomoya MORINAGA <tomoya-linux@dsn.lapis-semi.com> Signed-off-by: Vinod Koul <vinod.koul@linux.intel.com>
2011-09-20dmaengine: delete redundant chan_id and chancnt initialization in dma driversBarry Song
dma_async_device_register will re-init chan_id and chancnt, so whatever chan_id and chancnt are set in drivers, they will be re-written by dma_async_device_register. Cc: Nicolas Ferre <nicolas.ferre@atmel.com> Cc: Viresh Kumar <viresh.kumar@st.com> Cc: Vinod Koul <vinod.koul@intel.com> Cc: Piotr Ziecik <kosmo@semihalf.com> Cc: Yong Wang <yong.y.wang@intel.com> Cc: Jaswinder Singh <jassi.brar@samsung.com> Cc: Pelagicore AB <info@pelagicore.com> Signed-off-by: Barry Song <Baohua.Song@csr.com> Acked-by: Viresh Kumar <viresh.kumar@st.com> Signed-off-by: Vinod Koul <vinod.koul@intel.com>
2011-07-25pch_dma: Fix CTL register access issueTomoya MORINAGA
Currently, Mode-Control register is accessed by read-modify-write. According to DMA hardware specifications datasheet, prohibits this method. Because this register resets to 0 by DMA HW after DMA transfer completes. Thus, current read-modify-write processing can cause unexpected behavior. The datasheet says in case of writing Mode-Control register, set the value for only target channel, the others must set '11b'. e.g. Set DMA0=01b DMA11=10b CTL0=33333331h CTL2=00002333h NOTE: CTL0 includes DMA0~7 Mode-Control register. CTL2 includes DMA8~11 Mode-Control register. This patch modifies the issue. Signed-off-by: Tomoya MORINAGA <tomoya-linux@dsn.okisemi.com> Signed-off-by: Vinod Koul <vinod.koul@intel.com>
2011-07-14pch_dma: Fix channel lockingAlexander Stein
Fix for the following INFO message ================================= [ INFO: inconsistent lock state ] 2.6.39+ #89 --------------------------------- inconsistent {HARDIRQ-ON-W} -> {IN-HARDIRQ-W} usage. rs232/822 [HC1[1]:SC0[0]:HE0:SE1] takes: (&(&pd_chan->lock)->rlock){?.....}, at: [<c123b9a1>] pdc_desc_get+0x16/0xab {HARDIRQ-ON-W} state was registered at: [<c104fe28>] mark_irqflags+0xbd/0x11a [<c1050386>] __lock_acquire+0x501/0x6bb [<c1050945>] lock_acquire+0x63/0x7b [<c131c51d>] _raw_spin_lock_bh+0x43/0x51 [<c123bee4>] pd_alloc_chan_resources+0x92/0x11e [<c123ad62>] dma_chan_get+0x9b/0x107 [<c123b2d1>] __dma_request_channel+0x61/0xdc [<c11ba24b>] pch_request_dma+0x61/0x19e [<c11bb3b8>] pch_uart_startup+0x16a/0x1a2 [<c11b8446>] uart_startup+0x87/0x147 [<c11b9183>] uart_open+0x117/0x13e [<c11a5c7d>] tty_open+0x23c/0x34c [<c1097705>] chrdev_open+0x140/0x15f [<c10930a6>] __dentry_open.clone.14+0x14a/0x22b [<c1093dfb>] nameidata_to_filp+0x36/0x40 [<c109f28b>] do_last+0x513/0x635 [<c109f4af>] path_openat+0x9c/0x2aa [<c109f6e4>] do_filp_open+0x27/0x69 [<c1093f02>] do_sys_open+0xfd/0x184 [<c1093fad>] sys_open+0x24/0x2a [<c131d58c>] sysenter_do_call+0x12/0x32 irq event stamp: 2522 hardirqs last enabled at (2521): [<c131ca3b>] _raw_spin_unlock_irqrestore+0x36/0x52 hardirqs last disabled at (2522): [<c131db27>] common_interrupt+0x27/0x34 softirqs last enabled at (2354): [<c102fa11>] __do_softirq+0x10a/0x11a softirqs last disabled at (2299): [<c10041a4>] do_softirq+0x57/0xa4 other info that might help us debug this: 2 locks held by rs232/822: #0: (&tty->atomic_write_lock){+.+.+.}, at: [<c11a4b7a>] tty_write_lock+0x14/0x3c #1: (&port_lock_key){-.....}, at: [<c11bad72>] pch_uart_interrupt+0x17/0x1e9 stack backtrace: Pid: 822, comm: rs232 Not tainted 2.6.39+ #89 Call Trace: [<c1319f90>] ? printk+0x19/0x1b [<c104f893>] print_usage_bug+0x184/0x18f [<c104e5b1>] ? print_irq_inversion_bug+0x10e/0x10e [<c104f943>] mark_lock_irq+0xa5/0x1f6 [<c104fc9c>] mark_lock+0x208/0x2d7 [<c104fdc0>] mark_irqflags+0x55/0x11a [<c1050386>] __lock_acquire+0x501/0x6bb [<c10042ee>] ? dump_trace+0x92/0xb6 [<c1050945>] lock_acquire+0x63/0x7b [<c123b9a1>] ? pdc_desc_get+0x16/0xab [<c131c2d0>] _raw_spin_lock+0x3e/0x4c [<c123b9a1>] ? pdc_desc_get+0x16/0xab [<c123b9a1>] pdc_desc_get+0x16/0xab [<c10504d8>] ? __lock_acquire+0x653/0x6bb [<c123bb2c>] pd_prep_slave_sg+0x7c/0x1cb [<c1006c3f>] ? nommu_map_sg+0x6e/0x81 [<c11bace6>] dma_handle_tx+0x2cf/0x344 [<c11bad72>] ? pch_uart_interrupt+0x17/0x1e9 [<c11baebb>] pch_uart_interrupt+0x160/0x1e9 [<c10642fb>] handle_irq_event_percpu+0x25/0x127 [<c1064429>] handle_irq_event+0x2c/0x43 [<c1065e0d>] ? handle_fasteoi_irq+0x84/0x84 [<c1065eb9>] handle_edge_irq+0xac/0xce <IRQ> [<c1003ecb>] ? do_IRQ+0x38/0x9d [<c131db2e>] ? common_interrupt+0x2e/0x34 [<c105007b>] ? __lock_acquire+0x1f6/0x6bb [<c131ca3d>] ? _raw_spin_unlock_irqrestore+0x38/0x52 [<c11b798b>] ? uart_start+0x2d/0x32 [<c11b7998>] ? uart_flush_chars+0x8/0xa [<c11a7962>] ? n_tty_write+0x12c/0x1c6 [<c1027a73>] ? try_to_wake_up+0x251/0x251 [<c11a4d0b>] ? tty_write+0x169/0x1dc [<c11a7836>] ? n_tty_ioctl+0xb7/0xb7 [<c1094841>] ? vfs_write+0x91/0x10d [<c11a4ba2>] ? tty_write_lock+0x3c/0x3c [<c1094a69>] ? sys_write+0x3e/0x63 [<c131d58c>] ? sysenter_do_call+0x12/0x32 Signed-off-by: Alexander Stein <alexander.stein@systec-electronic.com> Tested-by: Tomoya MORINAGA <tomoya-linux@dsn.okisemi.com> Signed-off-by: Vinod Koul <vinod.koul@intel.com>
2011-06-01pch_dma: fix DMA issue(ch8-ch11)Tomoya MORINAGA
ISSUE: In case PCH_DMA with I2S communications with ch8~ch11, sometimes I2S data is not send correctly. CAUSE: The following patch I submitted before was not enough modification for supporting DMA ch8~ch11. The modification for status register of ch8~11 was not enough. pch_dma: Support I2S for ML7213 IOH author Tomoya MORINAGA <tomoya-linux@dsn.okisemi.com> Mon, 9 May 2011 07:09:38 +0000 (16:09 +0900) committer Vinod Koul <vinod.koul@intel.com> Mon, 9 May 2011 11:42:23 +0000 (16:42 +0530) commit 194f5f2706c7472f9c6bb2d17fa788993606581f tree c9d4903ea02b18939a4f390956a48be1a3734517 parent 60092d0bde4c8741198da4a69b693d3709385bf1 This patch fixes the issue. We can confirm PCH_DMA with I2S communications with ch8~ch11 works well. Signed-off-by: Tomoya MORINAGA <tomoya-linux@dsn.okisemi.com> Signed-off-by: Vinod Koul <vinod.koul@intel.com>
2011-05-09pch_dma: modify pci device table definitionTomoya MORINAGA
Signed-off-by: Tomoya MORINAGA <tomoya-linux@dsn.okisemi.com> Signed-off-by: Vinod Koul <vinod.koul@intel.com>
2011-05-09pch_dma: Support new device ML7223 IOHTomoya MORINAGA
Support new device OKI SEMICONDUCTOR ML7223 IOH(Input/Output Hub). The ML7223 IOH is for MP(Media Phone) use. The ML7223 is companion chip for Intel Atom E6xx series. The ML7223 is completely compatible for Intel EG20T PCH. Signed-off-by: Tomoya MORINAGA <tomoya-linux@dsn.okisemi.com> Signed-off-by: Vinod Koul <vinod.koul@intel.com>
2011-05-09pch_dma: Support I2S for ML7213 IOHTomoya MORINAGA
Support I2S device for ML7213 IOH Signed-off-by: Tomoya MORINAGA <tomoya-linux@dsn.okisemi.com> Signed-off-by: Vinod Koul <vinod.koul@intel.com>
2011-05-09pch_dma: Fix DMA setting issueTomoya MORINAGA
Currently, Direct-Start mode(*) is enabled. Our IOH's devices must not use this mode. This causes unexpected behavior. This patch deletes Direct-Start setting. (*) This mode is used in order for CPU to generate the DMA request. Signed-off-by: Tomoya MORINAGA <tomoya-linux@dsn.okisemi.com> Signed-off-by: Vinod Koul <vinod.koul@intel.com>
2011-05-09pch_dma: modify for checkpatchTomoya MORINAGA
Fix checkpatch warnings. Signed-off-by: Tomoya MORINAGA <tomoya-linux@dsn.okisemi.com> Signed-off-by: Vinod Koul <vinod.koul@intel.com>
2011-05-09pch_dma: fix dma direction issue for ML7213 IOH video-inTomoya MORINAGA
Currently, even-channel number is set as tx direction and odd is set as rx. However, though video-in uses ch6, the direction is not tx but rx. This patch sets video-in's DMA direction correctly. Signed-off-by: Tomoya MORINAGA <tomoya-linux@dsn.okisemi.com> Signed-off-by: Vinod Koul <vinod.koul@intel.com>
2011-04-06drivers, pch_dma: Fix uninitialized var before useLiu Yuan
In the function pdc_desc_get(), var 'i' is not initialized before use. This patch fixes it. Signed-off-by: Liu Yuan <tailai.ly@taobao.com> Signed-off-by: Vinod Koul <vinod.koul@intel.com>
2011-03-07drivers, pch_dma: Fix warning when CONFIG_PM=n.Rakib Mullick
When CONFIG_PM=n, we get the following warning: drivers/dma/pch_dma.c:741: warning: ‘pch_dma_suspend’ defined but not used drivers/dma/pch_dma.c:755: warning: ‘pch_dma_resume’ defined but not used To fix it, wrap pch_dma_{suspend,resume} and pch_dma_{save,restore}_regs functions with CONFIG_PM. Signed-off-by: Rakib Mullick <rakib.mullick@gmail.com> Signed-off-by: Vinod Koul <vinod.koul@intel.com>
2011-02-26pch_dma: set the number of array correctlyTomoya MORINAGA
set the number of array correctly. Signed-off-by: Tomoya MORINAGA <tomoya-linux@dsn.okisemi.com> Signed-off-by: Vinod Koul <vinod.koul@intel.com>
2011-02-26pch_dma: fix kernel error issueTomoya MORINAGA
fix the following kernel error ------------[ cut here ]------------ WARNING: at kernel/softirq.c:159 _local_bh_enable_ip.clone.5+0x35/0x71() Hardware name: To be filled by O.E.M. Modules linked in: pch_uart pch_dma fuse mga drm cpufreq_ondemand acpi_cpufreq mperf ip6t_REJECT nf_conntrack_ipv6 nf_defrag_ipv6 ip6table_filter ip6_tables ipv6 uinput snd_hda_codec_realtek snd_hda_intel snd_hda_codec matroxfb_base snd_hwdep 8250_pnp snd_seq snd_seq_device matroxfb_DAC1064 snd_pcm joydev 8250 matroxfb_accel snd_timer matroxfb_Ti3026 ppdev pegasus parport_pc snd parport matroxfb_g450 g450_pll serial_core video output matroxfb_misc soundcore snd_page_alloc serio_raw pcspkr ext4 jbd2 crc16 sdhci_pci sdhci mmc_core floppy [last unloaded: scsi_wait_scan] Pid: 0, comm: swapper Not tainted 2.6.37.upstream_check+ #8 Call Trace: [<c0433add>] warn_slowpath_common+0x65/0x7a [<c043825b>] ? _local_bh_enable_ip.clone.5+0x35/0x71 [<c0433b01>] warn_slowpath_null+0xf/0x13 [<c043825b>] _local_bh_enable_ip.clone.5+0x35/0x71 [<c043829f>] local_bh_enable_ip+0x8/0xa [<c06ec471>] _raw_spin_unlock_bh+0x10/0x12 [<f82b57dd>] pd_prep_slave_sg+0xba/0x200 [pch_dma] [<f82f7b7a>] pch_uart_interrupt+0x44d/0x6aa [pch_uart] [<c046fa97>] handle_IRQ_event+0x1d/0x9e [<c047146f>] handle_fasteoi_irq+0x90/0xc7 [<c04713df>] ? handle_fasteoi_irq+0x0/0xc7 <IRQ> [<c04045af>] ? do_IRQ+0x3e/0x89 [<c04035a9>] ? common_interrupt+0x29/0x30 [<c04400d8>] ? sys_getpriority+0x12d/0x1a2 [<c058bb2b>] ? arch_local_irq_enable+0x5/0xb [<c058c740>] ? acpi_idle_enter_bm+0x22a/0x261 [<c0648b11>] ? cpuidle_idle_call+0x70/0xa1 [<c0401f44>] ? cpu_idle+0x49/0x6a [<c06d9fc4>] ? rest_init+0x58/0x5a [<c089e762>] ? start_kernel+0x2d0/0x2d5 [<c089e0ce>] ? i386_start_kernel+0xce/0xd5 Signed-off-by: Tomoya MORINAGA <tomoya-linux@dsn.okisemi.com> Signed-off-by: Vinod Koul <vinod.koul@intel.com>
2011-01-14pch_dma: support new device ML7213 IOHTomoya MORINAGA
Support new device OKI SEMICONDUCTOR's ML7213 IOH(Input/Output Hub) which is for IVI(In-Vehicle Infotainment) use. The ML7213 is companion chip for Intel Atom E6xx series. The ML7213 is completely compatible for Intel EG20T PCH. Signed-off-by: Tomoya MORINAGA <tomoya-linux@dsn.okisemi.com> Signed-off-by: Dan Williams <dan.j.williams@intel.com>
2010-12-07dma : EG20T PCH: Fix miss-setting DMA descriptorTomoya MORINAGA
Currently, in case of using scatter/gather mode, head of data is not sent to destination. The cause is second descriptor address is set to NEXT. The NEXT must have head of descriptor address. This patch sets head of descriptor address to the NEXT. Acked-by: Yong Wang <youg.y.wang@intel.com> Signed-off-by: Tomoya MORINAGA <tomoya-linux@dsn.okisemi.com> [dan.j.williams@intel.com: fixed up usage of virt_to_phys()] Signed-off-by: Dan Williams <dan.j.williams@intel.com>
2010-10-27NULL-terminate all pci_device_id tablesDzianis Kahanovich
NULL-terminating pci_device_id in pch_dma.c and scx200_acb.c for appying MODULE_DEVICE_TABLE (to publish modalias-es). Signed-off-by: Dzianis Kahanovich <mahatma@eu.by> Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
2010-08-04DMAENGINE: pch_dma: kill another usage of __raw_{read|write}lYong Wang
Use {read|write}l instead of __raw_{read|write}l since PCH DMA controller is PCI device. Signed-off-by: Yong Wang <yong.y.wang@intel.com> Signed-off-by: Dan Williams <dan.j.williams@intel.com>
2010-08-04dmaengine: Driver for Topcliff PCH DMA controllerYong Wang
Topcliff PCH is the platform controller hub that is going to be used in Intel's upcoming general embedded platforms. This adds the driver for Topcliff PCH DMA controller. The DMA channels are strictly for device to host or host to device transfers and cannot be used for generic memcpy. Signed-off-by: Yong Wang <yong.y.wang@intel.com> [kill GFP_ATOMIC, kill __raw_{read|write}l, locking fixlet] Signed-off-by: Dan Williams <dan.j.williams@intel.com>