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Commit a969e76a authored by Martyn Welch's avatar Martyn Welch Committed by Kumar Gala
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powerpc: Correct USB support for GE Fanuc SBC610 



Support for the SBC610 VPX Single Board Computer from GE Fanuc (PowerPC
MPC8641D).

Fixup to correctly reconfigure USB, provided by an NEC uPD720101, after
device is reset. This requires a set of chip specific registers in the
devices configuration space to be correctly written, enabling all ports
and switching the device to use an external 48-MHz Oscillator.

Signed-off-by: default avatarMartyn Welch <martyn.welch@gefanuc.com>
Signed-off-by: default avatarKumar Gala <galak@kernel.crashing.org>
parent 0161dca5

arch/powerpc/platforms/86xx/gef_sbc610.c

+17 −0
Original line number Diff line number Diff line
@@ -12,6 +12,8 @@ 
 *

 * Based on: mpc86xx_hpcn.c (MPC86xx HPCN board specific routines)

 * Copyright 2006 Freescale Semiconductor Inc.

 *

 * NEC fixup adapted from arch/mips/pci/fixup-lm2e.c

 */



#include <linux/stddef.h>
@@ -75,6 +77,21 @@ static void gef_sbc610_show_cpuinfo(struct seq_file *m) 
	seq_printf(m, "Memory\t\t: %d MB\n", memsize / (1024 * 1024));

}



static void __init gef_sbc610_nec_fixup(struct pci_dev *pdev)

{

	unsigned int val;



	printk(KERN_INFO "Running NEC uPD720101 Fixup\n");



	/* Ensure ports 1, 2, 3, 4 & 5 are enabled */

	pci_read_config_dword(pdev, 0xe0, &val);

	pci_write_config_dword(pdev, 0xe0, (val & ~7) | 0x5);



	/* System clock is 48-MHz Oscillator and EHCI Enabled. */

	pci_write_config_dword(pdev, 0xe4, 1 << 5);

}

DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_NEC, PCI_DEVICE_ID_NEC_USB,

	gef_sbc610_nec_fixup);



/*

 * Called very early, device-tree isn't unflattened