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| author | Linus Torvalds <torvalds@linux-foundation.org> | 2026-08-19 10:09:22 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2026-08-19 10:09:22 -0700 |
| commit | f4cdf7ca9a1fdcca413157df19753f388a5a224e (patch) | |
| tree | 60a31895b2446cd7fa27514e8c2843534a0de0da /drivers/usb/host/ssb-hcd.c | |
| download | linux-stable-f4cdf7ca9a1fdcca413157df19753f388a5a224e.tar.gz linux-stable-f4cdf7ca9a1fdcca413157df19753f388a5a224e.zip | |
Merge tag 'media/v7.3-1' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-mediagrafted
Pull media updates from Mauro Carvalho Chehab:
- v4l2-core: added ISP statistics support and per-block validation
- v4l2-core: Allow unknown HDR10 white point and luminance
- New camera sensors: Sony IMX678 and IMX471m, Himax HM1092 IR sensor
- New codec: Milos: VPU v2.0 codec support
- isp driver: gained support for Dreamchip RPPX1 ISP framework
- vsp1 driver: gained support for RZ/T2H and RZ/N2H
- Novalake driver: gained CVS support for new NVL hardware
- dvb-core: fix feed leak on failed DMX_ADD_PID
- several driver fixes, cleanups and minor improvements
* tag 'media/v7.3-1' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-media: (308 commits)
media: ipu-bridge: check all DMI entries when overriding sensor rotation
media: v4l2-async: avoid deleting unlinked ASC entry on link error
media: rzg2l-cru: Align bytesperline to hardware DMA stride requirement
media: intel/ipu6: fix async notifier cleanup leak on parse error
media: staging/ipu7: fix async notifier UAF on probe error path
media: amd: isp4: fix self-deadlock in isp4sd_pwron_and_init() error path
media: amd: isp4: release partial allocations in isp4if_alloc_fw_gpumem()
media: rcar-isp: Fix VSPX reference leaks
media: rcar-isp: Release ISPCORE resources
media: i2c: imx415: Release runtime PM reference on VBLANK error
media: i2c: imx415: Return test pattern write errors
media: renesas: vsp1: Declare index variables in for loop statement
media: renesas: vsp1: Make reset control optional to support platforms without a reset line
media: dt-bindings: media: renesas,vsp1: Document RZ/T2H and RZ/N2H SoCs
media: dt-bindings: media: renesas,fcp: Document RZ/T2H and RZ/N2H SoCs
media: nxp: imx8-isi: Add additional 32-bit RGB format support
media: nxp: imx8-isi: Add 16-bit raw Bayer format support
media: nxp: imx8-isi: Implement per-stream reference counting for multiplexed streams
media: nxp: imx8-isi: Use BIT_ULL() for 64-bit stream masks
media: nxp: imx8-isi: Correct color map between V4L2 and ISI
...
Diffstat (limited to 'drivers/usb/host/ssb-hcd.c')
| -rw-r--r-- | drivers/usb/host/ssb-hcd.c | 274 |
1 files changed, 274 insertions, 0 deletions
diff --git a/drivers/usb/host/ssb-hcd.c b/drivers/usb/host/ssb-hcd.c new file mode 100644 index 000000000..016987764 --- /dev/null +++ b/drivers/usb/host/ssb-hcd.c @@ -0,0 +1,274 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Sonics Silicon Backplane + * Broadcom USB-core driver (SSB bus glue) + * + * Copyright 2011-2012 Hauke Mehrtens <hauke@hauke-m.de> + * + * Based on ssb-ohci driver + * Copyright 2007 Michael Buesch <m@bues.ch> + * + * Derived from the OHCI-PCI driver + * Copyright 1999 Roman Weissgaerber + * Copyright 2000-2002 David Brownell + * Copyright 1999 Linus Torvalds + * Copyright 1999 Gregory P. Smith + * + * Derived from the USBcore related parts of Broadcom-SB + * Copyright 2005-2011 Broadcom Corporation + */ +#include <linux/ssb/ssb.h> +#include <linux/delay.h> +#include <linux/platform_device.h> +#include <linux/module.h> +#include <linux/slab.h> +#include <linux/usb/ehci_pdriver.h> +#include <linux/usb/ohci_pdriver.h> + +MODULE_AUTHOR("Hauke Mehrtens"); +MODULE_DESCRIPTION("Common USB driver for SSB Bus"); +MODULE_LICENSE("GPL"); + +#define SSB_HCD_TMSLOW_HOSTMODE (1 << 29) + +struct ssb_hcd_device { + struct platform_device *ehci_dev; + struct platform_device *ohci_dev; + + u32 enable_flags; +}; + +static void ssb_hcd_5354wa(struct ssb_device *dev) +{ +#ifdef CONFIG_SSB_DRIVER_MIPS + /* Work around for 5354 failures */ + if (dev->id.revision == 2 && dev->bus->chip_id == 0x5354) { + /* Change syn01 reg */ + ssb_write32(dev, 0x894, 0x00fe00fe); + + /* Change syn03 reg */ + ssb_write32(dev, 0x89c, ssb_read32(dev, 0x89c) | 0x1); + } +#endif +} + +static void ssb_hcd_usb20wa(struct ssb_device *dev) +{ + if (dev->id.coreid == SSB_DEV_USB20_HOST) { + /* + * USB 2.0 special considerations: + * + * In addition to the standard SSB reset sequence, the Host + * Control Register must be programmed to bring the USB core + * and various phy components out of reset. + */ + ssb_write32(dev, 0x200, 0x7ff); + + /* Change Flush control reg */ + ssb_write32(dev, 0x400, ssb_read32(dev, 0x400) & ~8); + ssb_read32(dev, 0x400); + + /* Change Shim control reg */ + ssb_write32(dev, 0x304, ssb_read32(dev, 0x304) & ~0x100); + ssb_read32(dev, 0x304); + + udelay(1); + + ssb_hcd_5354wa(dev); + } +} + +/* based on arch/mips/brcm-boards/bcm947xx/pcibios.c */ +static u32 ssb_hcd_init_chip(struct ssb_device *dev) +{ + u32 flags = 0; + + if (dev->id.coreid == SSB_DEV_USB11_HOSTDEV) + /* Put the device into host-mode. */ + flags |= SSB_HCD_TMSLOW_HOSTMODE; + + ssb_device_enable(dev, flags); + + ssb_hcd_usb20wa(dev); + + return flags; +} + +static const struct usb_ehci_pdata ehci_pdata = { +}; + +static const struct usb_ohci_pdata ohci_pdata = { +}; + +static struct platform_device *ssb_hcd_create_pdev(struct ssb_device *dev, bool ohci, u32 addr, u32 len) +{ + struct platform_device *hci_dev; + struct resource hci_res[2]; + int ret; + + memset(hci_res, 0, sizeof(hci_res)); + + hci_res[0].start = addr; + hci_res[0].end = hci_res[0].start + len - 1; + hci_res[0].flags = IORESOURCE_MEM; + + hci_res[1].start = dev->irq; + hci_res[1].flags = IORESOURCE_IRQ; + + hci_dev = platform_device_alloc(ohci ? "ohci-platform" : + "ehci-platform" , 0); + if (!hci_dev) + return ERR_PTR(-ENOMEM); + + hci_dev->dev.parent = dev->dev; + hci_dev->dev.dma_mask = &hci_dev->dev.coherent_dma_mask; + + ret = platform_device_add_resources(hci_dev, hci_res, + ARRAY_SIZE(hci_res)); + if (ret) + goto err_alloc; + if (ohci) + ret = platform_device_add_data(hci_dev, &ohci_pdata, + sizeof(ohci_pdata)); + else + ret = platform_device_add_data(hci_dev, &ehci_pdata, + sizeof(ehci_pdata)); + if (ret) + goto err_alloc; + ret = platform_device_add(hci_dev); + if (ret) + goto err_alloc; + + return hci_dev; + +err_alloc: + platform_device_put(hci_dev); + return ERR_PTR(ret); +} + +static int ssb_hcd_probe(struct ssb_device *dev, + const struct ssb_device_id *id) +{ + int err, tmp; + int start, len; + u16 chipid_top; + u16 coreid = dev->id.coreid; + struct ssb_hcd_device *usb_dev; + + /* USBcores are only connected on embedded devices. */ + chipid_top = (dev->bus->chip_id & 0xFF00); + if (chipid_top != 0x4700 && chipid_top != 0x5300) + return -ENODEV; + + /* TODO: Probably need checks here; is the core connected? */ + + if (dma_set_mask_and_coherent(dev->dma_dev, DMA_BIT_MASK(32))) + return -EOPNOTSUPP; + + usb_dev = devm_kzalloc(dev->dev, sizeof(struct ssb_hcd_device), + GFP_KERNEL); + if (!usb_dev) + return -ENOMEM; + + /* We currently always attach SSB_DEV_USB11_HOSTDEV + * as HOST OHCI. If we want to attach it as Client device, + * we must branch here and call into the (yet to + * be written) Client mode driver. Same for remove(). */ + usb_dev->enable_flags = ssb_hcd_init_chip(dev); + + tmp = ssb_read32(dev, SSB_ADMATCH0); + + start = ssb_admatch_base(tmp); + len = (coreid == SSB_DEV_USB20_HOST) ? 0x800 : ssb_admatch_size(tmp); + usb_dev->ohci_dev = ssb_hcd_create_pdev(dev, true, start, len); + if (IS_ERR(usb_dev->ohci_dev)) + return PTR_ERR(usb_dev->ohci_dev); + + if (coreid == SSB_DEV_USB20_HOST) { + start = ssb_admatch_base(tmp) + 0x800; /* ehci core offset */ + usb_dev->ehci_dev = ssb_hcd_create_pdev(dev, false, start, len); + if (IS_ERR(usb_dev->ehci_dev)) { + err = PTR_ERR(usb_dev->ehci_dev); + goto err_unregister_ohci_dev; + } + } + + ssb_set_drvdata(dev, usb_dev); + return 0; + +err_unregister_ohci_dev: + platform_device_unregister(usb_dev->ohci_dev); + return err; +} + +static void ssb_hcd_remove(struct ssb_device *dev) +{ + struct ssb_hcd_device *usb_dev = ssb_get_drvdata(dev); + struct platform_device *ohci_dev = usb_dev->ohci_dev; + struct platform_device *ehci_dev = usb_dev->ehci_dev; + + if (ohci_dev) + platform_device_unregister(ohci_dev); + if (ehci_dev) + platform_device_unregister(ehci_dev); + + ssb_device_disable(dev, 0); +} + +static void ssb_hcd_shutdown(struct ssb_device *dev) +{ + ssb_device_disable(dev, 0); +} + +#ifdef CONFIG_PM + +static int ssb_hcd_suspend(struct ssb_device *dev, pm_message_t state) +{ + ssb_device_disable(dev, 0); + + return 0; +} + +static int ssb_hcd_resume(struct ssb_device *dev) +{ + struct ssb_hcd_device *usb_dev = ssb_get_drvdata(dev); + + ssb_device_enable(dev, usb_dev->enable_flags); + + return 0; +} + +#else /* !CONFIG_PM */ +#define ssb_hcd_suspend NULL +#define ssb_hcd_resume NULL +#endif /* CONFIG_PM */ + +static const struct ssb_device_id ssb_hcd_table[] = { + SSB_DEVICE(SSB_VENDOR_BROADCOM, SSB_DEV_USB11_HOSTDEV, SSB_ANY_REV), + SSB_DEVICE(SSB_VENDOR_BROADCOM, SSB_DEV_USB11_HOST, SSB_ANY_REV), + SSB_DEVICE(SSB_VENDOR_BROADCOM, SSB_DEV_USB20_HOST, SSB_ANY_REV), + {}, +}; +MODULE_DEVICE_TABLE(ssb, ssb_hcd_table); + +static struct ssb_driver ssb_hcd_driver = { + .name = KBUILD_MODNAME, + .id_table = ssb_hcd_table, + .probe = ssb_hcd_probe, + .remove = ssb_hcd_remove, + .shutdown = ssb_hcd_shutdown, + .suspend = ssb_hcd_suspend, + .resume = ssb_hcd_resume, +}; + +static int __init ssb_hcd_init(void) +{ + return ssb_driver_register(&ssb_hcd_driver); +} +module_init(ssb_hcd_init); + +static void __exit ssb_hcd_exit(void) +{ + ssb_driver_unregister(&ssb_hcd_driver); +} +module_exit(ssb_hcd_exit); |
