Author: jhibbits Date: Sat Dec 21 00:07:56 2013 New Revision: 259671 URL: http://svnweb.freebsd.org/changeset/base/259671
Log: Add suspend/resume to DBDMA and ATA on PowerMacs. This, and several subsequent commits, are suspend/resume for various PowerMac drivers, which will include a change to the global suspend/resume code eventually. Modified: head/sys/powerpc/powermac/ata_macio.c head/sys/powerpc/powermac/dbdma.c head/sys/powerpc/powermac/dbdmavar.h Modified: head/sys/powerpc/powermac/ata_macio.c ============================================================================== --- head/sys/powerpc/powermac/ata_macio.c Fri Dec 20 23:57:05 2013 (r259670) +++ head/sys/powerpc/powermac/ata_macio.c Sat Dec 21 00:07:56 2013 (r259671) @@ -114,11 +114,15 @@ static int ata_macio_probe(device_t de static int ata_macio_setmode(device_t dev, int target, int mode); static int ata_macio_attach(device_t dev); static int ata_macio_begin_transaction(struct ata_request *request); +static int ata_macio_suspend(device_t dev); +static int ata_macio_resume(device_t dev); static device_method_t ata_macio_methods[] = { /* Device interface */ DEVMETHOD(device_probe, ata_macio_probe), DEVMETHOD(device_attach, ata_macio_attach), + DEVMETHOD(device_suspend, ata_macio_suspend), + DEVMETHOD(device_resume, ata_macio_resume), /* ATA interface */ DEVMETHOD(ata_setmode, ata_macio_setmode), @@ -336,3 +340,34 @@ ata_macio_begin_transaction(struct ata_r return ata_begin_transaction(request); } + +static int +ata_macio_suspend(device_t dev) +{ + struct ata_dbdma_channel *ch = device_get_softc(dev); + int error; + + if (!ch->sc_ch.attached) + return (0); + + error = ata_suspend(dev); + dbdma_save_state(ch->dbdma); + + return (error); +} + +static int +ata_macio_resume(device_t dev) +{ + struct ata_dbdma_channel *ch = device_get_softc(dev); + int error; + + if (!ch->sc_ch.attached) + return (0); + + dbdma_restore_state(ch->dbdma); + error = ata_resume(dev); + + return (error); +} + Modified: head/sys/powerpc/powermac/dbdma.c ============================================================================== --- head/sys/powerpc/powermac/dbdma.c Fri Dec 20 23:57:05 2013 (r259670) +++ head/sys/powerpc/powermac/dbdma.c Sat Dec 21 00:07:56 2013 (r259671) @@ -343,6 +343,31 @@ dbdma_sync_commands(dbdma_channel_t *cha bus_dmamap_sync(chan->sc_dmatag, chan->sc_dmamap, op); } +void +dbdma_save_state(dbdma_channel_t *chan) +{ + + chan->sc_saved_regs[0] = dbdma_read_reg(chan, CHAN_CMDPTR); + chan->sc_saved_regs[1] = dbdma_read_reg(chan, CHAN_CMDPTR_HI); + chan->sc_saved_regs[2] = dbdma_read_reg(chan, CHAN_INTR_SELECT); + chan->sc_saved_regs[3] = dbdma_read_reg(chan, CHAN_BRANCH_SELECT); + chan->sc_saved_regs[4] = dbdma_read_reg(chan, CHAN_WAIT_SELECT); + + dbdma_stop(chan); +} + +void +dbdma_restore_state(dbdma_channel_t *chan) +{ + + dbdma_wake(chan); + dbdma_write_reg(chan, CHAN_CMDPTR, chan->sc_saved_regs[0]); + dbdma_write_reg(chan, CHAN_CMDPTR_HI, chan->sc_saved_regs[1]); + dbdma_write_reg(chan, CHAN_INTR_SELECT, chan->sc_saved_regs[2]); + dbdma_write_reg(chan, CHAN_BRANCH_SELECT, chan->sc_saved_regs[3]); + dbdma_write_reg(chan, CHAN_WAIT_SELECT, chan->sc_saved_regs[4]); +} + static uint32_t dbdma_read_reg(dbdma_channel_t *chan, u_int offset) { Modified: head/sys/powerpc/powermac/dbdmavar.h ============================================================================== --- head/sys/powerpc/powermac/dbdmavar.h Fri Dec 20 23:57:05 2013 (r259670) +++ head/sys/powerpc/powermac/dbdmavar.h Sat Dec 21 00:07:56 2013 (r259671) @@ -60,6 +60,7 @@ struct dbdma_channel { bus_dma_tag_t sc_dmatag; bus_dmamap_t sc_dmamap; + uint32_t sc_saved_regs[5]; }; _______________________________________________ svn-src-head@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/svn-src-head To unsubscribe, send any mail to "svn-src-head-unsubscr...@freebsd.org"