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Check and set PCI power management register. clcs now works when 

warm boot from Windows.
This commit is contained in:
tacha 2001-02-13 04:11:11 +00:00
parent 3d4ad14d6a
commit 08cc996106
1 changed files with 20 additions and 4 deletions
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24
sys/dev/pci/cs4280.c
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@ -1,4 +1,4 @@
/* $NetBSD: cs4280.c,v 1.14 2001/02/07 14:41:10 tacha Exp $ */
/* $NetBSD: cs4280.c,v 1.15 2001/02/13 04:11:11 tacha Exp $ */
/*
* Copyright (c) 1999, 2000 Tatoku Ogaito. All rights reserved.
@ -208,10 +208,11 @@ cs4280_attach(parent, self, aux)
pci_chipset_tag_t pc = pa->pa_pc;
char const *intrstr;
pci_intr_handle_t ih;
pcireg_t csr;
pcireg_t reg;
char devinfo[256];
mixer_ctrl_t ctl;
u_int32_t mem;
int pci_pwrmgmt_cap_reg, pci_pwrmgmt_csr_reg;
pci_devinfo(pa->pa_id, pa->pa_class, 0, devinfo);
printf(": %s (rev. 0x%02x)\n", devinfo, PCI_REVISION(pa->pa_class));
@ -232,10 +233,25 @@ cs4280_attach(parent, self, aux)
sc->sc_dmatag = pa->pa_dmat;
/* Check and set Power State */
if (pci_get_capability(pa->pa_pc, pa->pa_tag, PCI_CAP_PWRMGMT,
&pci_pwrmgmt_cap_reg, 0)) {
pci_pwrmgmt_csr_reg = pci_pwrmgmt_cap_reg + 4;
reg = pci_conf_read(pa->pa_pc, pa->pa_tag,
pci_pwrmgmt_csr_reg);
DPRINTF(("%s: Power State is %d\n",
sc->sc_dev.dv_xname, reg & PCI_PMCSR_STATE_MASK));
if ((reg & PCI_PMCSR_STATE_MASK) != PCI_PMCSR_STATE_D0) {
pci_conf_write(pc, pa->pa_tag, pci_pwrmgmt_csr_reg,
(reg & ~PCI_PMCSR_STATE_MASK) |
PCI_PMCSR_STATE_D0);
}
}
/* Enable the device (set bus master flag) */
csr = pci_conf_read(pa->pa_pc, pa->pa_tag, PCI_COMMAND_STATUS_REG);
reg = pci_conf_read(pa->pa_pc, pa->pa_tag, PCI_COMMAND_STATUS_REG);
pci_conf_write(pa->pa_pc, pa->pa_tag, PCI_COMMAND_STATUS_REG,
csr | PCI_COMMAND_MASTER_ENABLE);
reg | PCI_COMMAND_MASTER_ENABLE);
/* LATENCY_TIMER setting */
mem = pci_conf_read(pa->pa_pc, pa->pa_tag, PCI_BHLC_REG);