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mpc83xx: add PCISLAVE support to 83XX_GENERIC_PCI setup code

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This adds a helper function to unlock the PCI configuration bit, so that
any extra PCI setup (such as outbound windows, etc.) can be done after
using the 83XX_GENERIC_PCI code to set up the PCI bus.

Signed-off-by: Ira W. Snyder <iws@ovro.caltech.edu>
Signed-off-by: Kim Phillips <kim.phillips@freescale.com>
This commit is contained in:
Ira W. Snyder 2008-08-22 11:00:14 -07:00 • committed by Kim Phillips
parent 162338e1fc
commit 4ff9aea9d6
1 changed files with 26 additions and 0 deletions
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26
cpu/mpc83xx/pci.c
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@ -167,6 +167,32 @@ void mpc83xx_pci_init(int num_buses, struct pci_region **reg, int warmboot)
pci_init_bus(i, reg[i]);
}
#ifdef CONFIG_PCISLAVE
#define PCI_FUNCTION_CONFIG 0x44
#define PCI_FUNCTION_CFG_LOCK 0x20
/*
* Unlock the configuration bit so that the host system can begin booting
*
* This should be used after you have:
* 1) Called mpc83xx_pci_init()
* 2) Set up your inbound translation windows to the appropriate size
*/
void mpc83xx_pcislave_unlock(int bus)
{
struct pci_controller *hose = &pci_hose[bus];
u32 dev;
u16 reg16;
/* Unlock configuration lock in PCI function configuration register */
dev = PCI_BDF(hose->first_busno, 0, 0);
pci_hose_read_config_word (hose, dev, PCI_FUNCTION_CONFIG, &reg16);
reg16 &= ~(PCI_FUNCTION_CFG_LOCK);
pci_hose_write_config_word (hose, dev, PCI_FUNCTION_CONFIG, reg16);
}
#endif
#if defined(CONFIG_OF_LIBFDT)
void ft_pci_setup(void *blob, bd_t *bd)
{