mirror of https://gitee.com/openkylin/linux.git
3 Commits
Author | SHA1 | Message | Date |
---|---|---|---|
Lorenzo Pieralisi | f1e8bd21e3 |
PCI: faraday: Convert IRQ masking to raw PCI config accessors
Current ftpci100 driver host bridge controller driver requires struct pci_bus to be created in order to mask and clear IRQs using standard PCI bus config accessors. This struct pci_bus dependency is fictitious and burdens the driver with unneeded constraints (eg to use separate APIs to create and scan the root bus). Add PCI raw config space accessors to PCIe ftpci100 driver and remove the fictitious struct pci_bus dependency. Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com> [bhelgaas: folded in raw PCI read accessor from http://lkml.kernel.org/r/20170621162651.25315-1-linus.walleij@linaro.org The clock piece of the above posting goes with the separate "Add clock handling" patch.] Signed-off-by: Bjorn Helgaas <bhelgaas@google.com> Acked-by: Linus Walleij <linus.walleij@linaro.org> |
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Brian Norris | a5f40e8098 |
PCI: Don't allow unbinding host controllers that aren't prepared
Many PCI host controller drivers aren't prepared to have their devices unbound from them forcefully (e.g., through /sys/.../<driver>/unbind), as they don't provide any driver .remove callback, where they'd detach the root bus, release resources, etc. Keeping the driver built in (i.e., not a loadable module) is not enough; and providing no .remove callback just means we don't do any teardown. To rule out the possibility of unbinding a device via sysfs, we need to set the ".suppress_bind_attrs" field. I found the suspect drivers via the following search: git grep -l platform_driver $(git grep -L -e '\.remove' -e suppress_bind_attrs drivers/pci/) Then I inspected them to ensure that (a) they set up a PCI bus in their probe() and (b) they don't have a remove() callback for undoing the setup Suggested-by: Bjorn Helgaas <helgaas@kernel.org> Signed-off-by: Brian Norris <briannorris@chromium.org> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com> |
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Linus Walleij | d3c68e0a7e |
PCI: faraday: Add Faraday Technology FTPCI100 PCI Host Bridge driver
Add a host bridge driver for the Faraday Technology FPPCI100 host bridge, used for Cortina Systems Gemini SoC (SL3516) PCI Host Bridge. This code is inspired by the out-of-tree OpenWRT patch and then extensively rewritten for device tree and using the modern helpers to cut down and modernize the code to all new PCI frameworks. A driver exists in U-Boot as well. Tested on the ITian Square One SQ201 NAS with the following result in the boot log (trimmed to relevant parts): OF: PCI: host bridge /soc/pci@50000000 ranges: OF: PCI: IO 0x50000000..0x500fffff -> 0x00000000 OF: PCI: MEM 0x58000000..0x5fffffff -> 0x58000000 ftpci100 50000000.pci: PCI host bridge to bus 0000:00 pci_bus 0000:00: root bus resource [bus 00-ff] pci_bus 0000:00: root bus resource [io 0x0000-0xfffff] pci_bus 0000:00: root bus resource [mem 0x58000000-0x5fffffff] ftpci100 50000000.pci: DMA MEM1 BASE: 0x0000000000000000 -> 0x0000000007ffffff config 00070000 ftpci100 50000000.pci: DMA MEM2 BASE: 0x0000000000000000 -> 0x0000000003ffffff config 00060000 ftpci100 50000000.pci: DMA MEM3 BASE: 0x0000000000000000 -> 0x0000000003ffffff config 00060000 PCI: bus0: Fast back to back transfers disabled pci 0000:00:00.0: of_irq_parse_pci() failed with rc=-22 pci 0000:00:0c.0: BAR 0: assigned [mem 0x58000000-0x58007fff] pci 0000:00:09.2: BAR 0: assigned [mem 0x58008000-0x580080ff] pci 0000:00:09.0: BAR 4: assigned [io 0x1000-0x101f] pci 0000:00:09.1: BAR 4: assigned [io 0x1020-0x103f] pci 0000:00:09.0: enabling device (0140 -> 0141) pci 0000:00:09.0: HCRESET not completed yet! pci 0000:00:09.1: enabling device (0140 -> 0141) pci 0000:00:09.1: HCRESET not completed yet! pci 0000:00:09.2: enabling device (0140 -> 0142) rt61pci 0000:00:0c.0: enabling device (0140 -> 0142) ieee80211 phy0: rt2x00_set_chip: Info - Chipset detected - rt: 2561, rf: 0003, rev: 000c ehci_hcd: USB 2.0 'Enhanced' Host Controller (EHCI) Driver ehci-pci: EHCI PCI platform driver ehci-pci 0000:00:09.2: EHCI Host Controller ehci-pci 0000:00:09.2: new USB bus registered, assigned bus number 1 ehci-pci 0000:00:09.2: irq 125, io mem 0x58008000 ehci-pci 0000:00:09.2: USB 2.0 started, EHCI 1.00 hub 1-0:1.0: USB hub found hub 1-0:1.0: 4 ports detected uhci_hcd: USB Universal Host Controller Interface driver uhci_hcd 0000:00:09.0: UHCI Host Controller uhci_hcd 0000:00:09.0: new USB bus registered, assigned bus number 2 uhci_hcd 0000:00:09.0: HCRESET not completed yet! uhci_hcd 0000:00:09.0: irq 123, io base 0x00001000 hub 2-0:1.0: USB hub found hub 2-0:1.0: config failed, hub doesn't have any ports! (err -19) uhci_hcd 0000:00:09.1: UHCI Host Controller uhci_hcd 0000:00:09.1: new USB bus registered, assigned bus number 3 uhci_hcd 0000:00:09.1: HCRESET not completed yet! uhci_hcd 0000:00:09.1: irq 124, io base 0x00001020 hub 3-0:1.0: USB hub found hub 3-0:1.0: config failed, hub doesn't have any ports! (err -19) scsi 0:0:0:0: Direct-Access USB Flash Disk 1.00 PQ: 0 ANSI: 2 sd 0:0:0:0: [sda] 7900336 512-byte logical blocks: (4.04 GB/3.77 GiB) sd 0:0:0:0: [sda] Write Protect is off sd 0:0:0:0: [sda] No Caching mode page found sd 0:0:0:0: [sda] Assuming drive cache: write through sda: sda1 sda2 sda3 sd 0:0:0:0: [sda] Attached SCSI removable disk ieee80211 phy0: rt2x00lib_request_firmware: Info - Loading firmware file 'rt2561s.bin' ieee80211 phy0: rt2x00lib_request_firmware: Info - Firmware detected - version: 0.8 IPv6: ADDRCONF(NETDEV_UP): wlan0: link is not ready $ lspci 00:00.0 Class 0600: 159b:4321 00:09.2 Class 0c03: 1106:3104 00:09.0 Class 0c03: 1106:3038 00:09.1 Class 0c03: 1106:3038 00:0c.0 Class 0280: 1814:0301 $ cat /proc/interrupts CPU0 123: 0 PCI 0 Edge uhci_hcd:usb2 124: 0 PCI 1 Edge uhci_hcd:usb3 125: 159 PCI 2 Edge ehci_hcd:usb1 126: 1082 PCI 3 Edge rt61pci $ cat /proc/iomem 50000000-500000ff : /soc/pci@50000000 58000000-5fffffff : Gemini PCI MEM 58000000-58007fff : 0000:00:0c.0 58000000-58007fff : 0000:00:0c.0 58008000-580080ff : 0000:00:09.2 58008000-580080ff : ehci_hcd The EHCI USB hub works fine; I can mount and manage files and the IRQs just keep ticking up. I can issue iwlist wlan0 scanning and see all the WLANs here. I don't have wpa_supplicant so have not tried connecting to them. [bhelgaas: fold in %pap change from Arnd Bergmann <arnd@arndb.de>] Signed-off-by: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com> CC: Janos Laube <janos.dev@gmail.com> CC: Paulius Zaleckas <paulius.zaleckas@gmail.com> CC: Hans Ulli Kroll <ulli.kroll@googlemail.com> CC: Florian Fainelli <f.fainelli@gmail.com> CC: Feng-Hsin Chiang <john453@faraday-tech.com> CC: Greentime Hu <green.hu@gmail.com> |