BCM4331 reset leads to wl lockup
Michael Büsch <[email protected]>
| Newsgroups | org.infradead.lists.b43-dev,org.kernel.vger.linux-wireless |
|---|---|
| Message-ID | <20160526144246.217bfff1@wiggum> |
On Thu, 26 May 2016 14:12:10 +0200 Lukas Wunner <[email protected]> wrote: > + mmio = early_ioremap(addr, BCM4331_MMIO_SIZE); > + if (!mmio) { > + pr_err("Cannot iomap Apple AirPort card\n"); > + return; > + } > + pr_info("Resetting Apple AirPort card\n"); > + iowrite32(BCMA_RESET_CTL_RESET, > + mmio + (1 * BCMA_CORE_SIZE) + BCMA_RESET_CTL); > + early_iounmap(mmio, BCM4331_MMIO_SIZE); Just writing that bit is not the correct reset procedure. So it might cause problems depending on how wl does the core reset later. Please try this: - wait for BCMA_RESET_ST to be 0 - set reset bit - flush - wait 1us - reset reset bit - flush - wait 10us See bcma_core_disable() -- Michael -------------- next part -------------- A non-text attachment was scrubbed... Name: not available Type: application/pgp-signature Size: 819 bytes Desc: OpenPGP digital signature URL: <http://lists.infradead.org/pipermail/b43-dev/attachments/20160526/cabe4088/attachment.sig>