kern/134878: [puc] [patch] Add support for Oxford OXPCIe954 and OXPCIe958 PCI Express chips

[David Wood]

The following reply was made to PR kern/134878; it has been noted by GNATS.

From: David Wood <david at wood2.org.uk>
To: bug-followup at FreeBSD.org, david at wood2.org.uk, marcel at FreeBSD.org
Cc:  
Subject: Re: kern/134878: [puc] [patch] Add support for Oxford OXPCIe954 and OXPCIe958 PCI Express chips
Date: Sat, 6 Jun 2009 09:48:50 +0100

 [marcel@ cc'd, as I believe he is maintaining puc(4)]
 
 I have updated the patches to:
 
 * Support the '2 native UARTs' configuration of the OXPCIe952
 
 * Read the number of UARTs from BAR 0 (rid 0x10) offset 0x4, so boards 
 with slave chips or some UARTs disabled by EEPROM are now fully 
 supported.
 
 * Print the number of UARTs found.
 
 * Set the enhanced mode bit on each UART, so uart(4) detects them as 
 16950 and should make use of the deeper FIFOs.
 
 
 Apart from MSI-X support (which would be nice), all the features of 
 these chips that are within the ambit of puc(4) rather than uart(4) are 
 now supported.
 
 
 The Lindy 51189 board in my Dell PowerEdge 2950 III running 7.2-RELEASE 
 amd64 with the patch applied appears as:
 
 boot (extract):
 
 puc0: <Oxford Semiconductor OXPCIe954 UARTs> mem 
 0xd5efc000-0xd5efffff,0xd5c00000-0xd5dfffff,0xd5a00000-0xd5bfffff irq 18 
 at device 0.0 on pci8
 puc0: 4 UARTs detected
 puc0: [FILTER]
 uart0: <16950 or compatible> on puc0
 uart0: [FILTER]
 uart1: <16950 or compatible> on puc0
 uart1: [FILTER]
 uart2: <16950 or compatible> on puc0
 uart2: [FILTER]
 uart3: <16950 or compatible> on puc0
 uart3: [FILTER]
 
 
 pciconf -lcv (extract):
 
 puc0 at pci0:8:0:0:        class=0x070002 card=0xc2081415 chip=0xc2081415 
 rev=0x00 hdr=0x00
      vendor     = 'Oxford Semiconductor Ltd'
      class      = simple comms
      subclass   = UART
      cap 01[40] = powerspec 3  supports D0 D1 D2 D3  current D0
      cap 10[70] = PCI-Express 1 endpoint
      cap 11[b0] = MSI-X supports 16 messages in map 0x14
 
 
 Kernel configuration (partial):
 
 include GENERIC
 
 ident MANGANESE
 
 # SERIAL
 
 # Multi-port serial cards
 device puc
 
 # Disable sio(4) so that uart(4) is used
 nodevice sio
 
 
 
 The latest patches are in the same locations as the old ones:
 
 7.2-RELEASE (tested):
 http://www.wood2.org.uk/freebsd/oxford-pci-e-pucdata.c.7.2-release.patch
 
 HEAD (untested):
 http://www.wood2.org.uk/freebsd/oxford-pci-e-pucdata.c.patch
 
 
 The old patches are still available - suffix the URLs with .old
 
 
 
 With best wishes,
 
 
 
 
 David
 -- 
 David Wood
 david at wood2.org.uk