Message ID | 20190716110947.32603-1-matthias.bgg@kernel.org |
---|---|
State | Accepted |
Commit | 49822442edd910efdf12eb8070a9c9cc7c48037d |
Delegated to: | Matthias Brugger |
Headers | show |
Series | [U-Boot] ARM: bcm283x mbox: Fix send status register | expand |
On 7/16/19 5:09 AM, matthias.bgg@kernel.org wrote: > From: Fabian Vogt <fvogt@suse.com> > > Before we can send a message to the mailbox we have to check that there > is space to do so. Therefore we poll the status register. But up to now > the wrong status register, the one of mailbox 0, was checked. Fix this > by polling the status regiser of mailbox 1. This sounds plausible at least (I didn't check which of mbox 0/1 was TX/RX), so, Acked-by: Stephen Warren <swarren@wwwdotorg.org>
diff --git a/arch/arm/mach-bcm283x/include/mach/mbox.h b/arch/arm/mach-bcm283x/include/mach/mbox.h index e3a893e49c..f892803558 100644 --- a/arch/arm/mach-bcm283x/include/mach/mbox.h +++ b/arch/arm/mach-bcm283x/include/mach/mbox.h @@ -46,9 +46,12 @@ struct bcm2835_mbox_regs { u32 read; u32 rsvd0[5]; - u32 status; - u32 config; + u32 mail0_status; + u32 mail0_config; u32 write; + u32 rsvd1[5]; + u32 mail1_status; + u32 mail1_config; }; #define BCM2835_MBOX_STATUS_WR_FULL 0x80000000 diff --git a/arch/arm/mach-bcm283x/mbox.c b/arch/arm/mach-bcm283x/mbox.c index 1642ebd103..3c67f68c17 100644 --- a/arch/arm/mach-bcm283x/mbox.c +++ b/arch/arm/mach-bcm283x/mbox.c @@ -27,7 +27,7 @@ int bcm2835_mbox_call_raw(u32 chan, u32 send, u32 *recv) /* Drain any stale responses */ for (;;) { - val = readl(®s->status); + val = readl(®s->mail0_status); if (val & BCM2835_MBOX_STATUS_RD_EMPTY) break; if (get_timer(0) >= endtime) { @@ -40,7 +40,7 @@ int bcm2835_mbox_call_raw(u32 chan, u32 send, u32 *recv) /* Wait for space to send */ for (;;) { - val = readl(®s->status); + val = readl(®s->mail1_status); if (!(val & BCM2835_MBOX_STATUS_WR_FULL)) break; if (get_timer(0) >= endtime) { @@ -58,7 +58,7 @@ int bcm2835_mbox_call_raw(u32 chan, u32 send, u32 *recv) /* Wait for the response */ for (;;) { - val = readl(®s->status); + val = readl(®s->mail0_status); if (!(val & BCM2835_MBOX_STATUS_RD_EMPTY)) break; if (get_timer(0) >= endtime) {