/*
* Attach this instance, and then all the sub-devices
*/
static int
esp_pci_attach(device_t dev)
{
struct esp_pci_softc *esc;
struct ncr53c9x_softc *sc;
int error;
esc = device_get_softc(dev);
sc = &esc->sc_ncr53c9x;
NCR_LOCK_INIT(sc);
esc->sc_dev = dev;
sc->sc_glue = &esp_pci_glue;
pci_enable_busmaster(dev);
error = bus_alloc_resources(dev, esp_pci_res_spec, esc->sc_res);
if (error != 0) {
device_printf(dev, "failed to allocate resources\n");
bus_release_resources(dev, esp_pci_res_spec, esc->sc_res);
return (error);
}
error = bus_dma_tag_create(bus_get_dma_tag(dev), 1, 0,
BUS_SPACE_MAXADDR_32BIT, BUS_SPACE_MAXADDR, NULL, NULL,
BUS_SPACE_MAXSIZE_32BIT, BUS_SPACE_UNRESTRICTED,
BUS_SPACE_MAXSIZE_32BIT, 0, NULL, NULL, &esc->sc_pdmat);
if (error != 0) {
device_printf(dev, "cannot create parent DMA tag\n");
goto fail_res;
}
/*
* XXX More of this should be in ncr53c9x_attach(), but
* XXX should we really poke around the chip that much in
* XXX the MI code? Think about this more...
*/
/*
* Set up static configuration info.
*
* XXX we should read the configuration from the EEPROM.
*/
sc->sc_id = 7;
sc->sc_cfg1 = sc->sc_id | NCRCFG1_PARENB;
sc->sc_cfg2 = NCRCFG2_SCSI2 | NCRCFG2_FE;
sc->sc_cfg3 = NCRAMDCFG3_IDM | NCRAMDCFG3_FCLK;
sc->sc_cfg4 = NCRAMDCFG4_GE12NS | NCRAMDCFG4_RADE;
sc->sc_rev = NCR_VARIANT_AM53C974;
sc->sc_features = NCR_F_FASTSCSI | NCR_F_DMASELECT;
sc->sc_cfg3_fscsi = NCRAMDCFG3_FSCSI;
sc->sc_freq = 40; /* MHz */
/*
* This is the value used to start sync negotiations
* Note that the NCR register "SYNCTP" is programmed
* in "clocks per byte", and has a minimum value of 4.
* The SCSI period used in negotiation is one-fourth
* of the time (in nanoseconds) needed to transfer one byte.
* Since the chip's clock is given in MHz, we have the following
* formula: 4 * period = (1000 / freq) * 4
*/
sc->sc_minsync = 1000 / sc->sc_freq;
sc->sc_maxxfer = DFLTPHYS; /* see below */
sc->sc_maxoffset = 15;
sc->sc_extended_geom = 1;
#define MDL_SEG_SIZE 0x1000 /* 4kbyte per segment */
/*
* Create the DMA tag and map for the data transfers.
*
* Note: given that bus_dma(9) only adheres to the requested alignment
* for the first segment (and that also only for bus_dmamem_alloc()ed
* DMA maps) we can't use the Memory Descriptor List. However, also
* when not using the MDL, the maximum transfer size apparently is
* limited to 4k so we have to split transfers up, which plain sucks.
*/
error = bus_dma_tag_create(esc->sc_pdmat, PAGE_SIZE, 0,
BUS_SPACE_MAXADDR_32BIT, BUS_SPACE_MAXADDR, NULL, NULL,
MDL_SEG_SIZE, 1, MDL_SEG_SIZE, BUS_DMA_ALLOCNOW,
busdma_lock_mutex, &sc->sc_lock, &esc->sc_xferdmat);
if (error != 0) {
device_printf(dev, "cannot create transfer DMA tag\n");
goto fail_pdmat;
}
error = bus_dmamap_create(esc->sc_xferdmat, 0, &esc->sc_xferdmam);
if (error != 0) {
device_printf(dev, "cannot create transfer DMA map\n");
goto fail_xferdmat;
}
error = bus_setup_intr(dev, esc->sc_res[ESP_PCI_RES_INTR],
INTR_MPSAFE | INTR_TYPE_CAM, NULL, ncr53c9x_intr, sc,
&esc->sc_ih);
if (error != 0) {
device_printf(dev, "cannot set up interrupt\n");
goto fail_xferdmam;
}
/* Do the common parts of attachment. */
sc->sc_dev = esc->sc_dev;
error = ncr53c9x_attach(sc);
if (error != 0) {
device_printf(esc->sc_dev, "ncr53c9x_attach failed\n");
goto fail_intr;
}
return (0);
fail_intr:
bus_teardown_intr(esc->sc_dev, esc->sc_res[ESP_PCI_RES_INTR],
esc->sc_ih);
fail_xferdmam:
bus_dmamap_destroy(esc->sc_xferdmat, esc->sc_xferdmam);
fail_xferdmat:
bus_dma_tag_destroy(esc->sc_xferdmat);
fail_pdmat:
bus_dma_tag_destroy(esc->sc_pdmat);
fail_res:
bus_release_resources(dev, esp_pci_res_spec, esc->sc_res);
NCR_LOCK_DESTROY(sc);
return (error);
}
static int
espattach(struct esp_softc *esc, const struct ncr53c9x_glue *gluep)
{
struct ncr53c9x_softc *sc = &esc->sc_ncr53c9x;
unsigned int uid = 0;
int error, i;
NCR_LOCK_INIT(sc);
/* Attach the DMA engine. */
error = lsi64854_attach(esc->sc_dma);
if (error != 0) {
device_printf(esc->sc_dev, "lsi64854_attach failed\n");
goto fail_lock;
}
sc->sc_id = OF_getscsinitid(esc->sc_dev);
#ifdef ESP_SBUS_DEBUG
device_printf(esc->sc_dev, "%s: sc_id %d, freq %d\n",
__func__, sc->sc_id, sc->sc_freq);
#endif
/*
* The `ESC' DMA chip must be reset before we can access
* the ESP registers.
*/
if (esc->sc_dma->sc_rev == DMAREV_ESC)
DMA_RESET(esc->sc_dma);
/*
* Set up glue for MI code early; we use some of it here.
*/
sc->sc_glue = gluep;
/* gimme MHz */
sc->sc_freq /= 1000000;
/*
* XXX More of this should be in ncr53c9x_attach(), but
* XXX should we really poke around the chip that much in
* XXX the MI code? Think about this more...
*/
/*
* Read the part-unique ID code of the SCSI chip. The contained
* value is only valid if all of the following conditions are met:
* - After power-up or chip reset.
* - Before any value is written to this register.
* - The NCRCFG2_FE bit is set.
* - A (NCRCMD_NOP | NCRCMD_DMA) command has been issued.
*/
NCRCMD(sc, NCRCMD_RSTCHIP);
NCRCMD(sc, NCRCMD_NOP);
sc->sc_cfg2 = NCRCFG2_FE;
NCR_WRITE_REG(sc, NCR_CFG2, sc->sc_cfg2);
NCRCMD(sc, NCRCMD_NOP | NCRCMD_DMA);
uid = NCR_READ_REG(sc, NCR_UID);
/*
* It is necessary to try to load the 2nd config register here,
* to find out what rev the esp chip is, else the ncr53c9x_reset
* will not set up the defaults correctly.
*/
sc->sc_cfg1 = sc->sc_id | NCRCFG1_PARENB;
NCR_WRITE_REG(sc, NCR_CFG1, sc->sc_cfg1);
sc->sc_cfg2 = 0;
NCR_WRITE_REG(sc, NCR_CFG2, sc->sc_cfg2);
sc->sc_cfg2 = NCRCFG2_SCSI2 | NCRCFG2_RPE;
NCR_WRITE_REG(sc, NCR_CFG2, sc->sc_cfg2);
if ((NCR_READ_REG(sc, NCR_CFG2) & ~NCRCFG2_RSVD) !=
(NCRCFG2_SCSI2 | NCRCFG2_RPE)) {
sc->sc_rev = NCR_VARIANT_ESP100;
} else {
sc->sc_cfg2 = NCRCFG2_SCSI2;
NCR_WRITE_REG(sc, NCR_CFG2, sc->sc_cfg2);
sc->sc_cfg3 = 0;
NCR_WRITE_REG(sc, NCR_CFG3, sc->sc_cfg3);
sc->sc_cfg3 = (NCRCFG3_CDB | NCRCFG3_FCLK);
NCR_WRITE_REG(sc, NCR_CFG3, sc->sc_cfg3);
if (NCR_READ_REG(sc, NCR_CFG3) !=
(NCRCFG3_CDB | NCRCFG3_FCLK)) {
sc->sc_rev = NCR_VARIANT_ESP100A;
} else {
/* NCRCFG2_FE enables > 64K transfers. */
sc->sc_cfg2 |= NCRCFG2_FE;
sc->sc_cfg3 = 0;
NCR_WRITE_REG(sc, NCR_CFG3, sc->sc_cfg3);
if (sc->sc_freq <= 25)
sc->sc_rev = NCR_VARIANT_ESP200;
else {
switch ((uid & 0xf8) >> 3) {
case 0x00:
sc->sc_rev = NCR_VARIANT_FAS100A;
break;
case 0x02:
if ((uid & 0x07) == 0x02)
sc->sc_rev = NCR_VARIANT_FAS216;
else
sc->sc_rev = NCR_VARIANT_FAS236;
break;
case 0x0a:
sc->sc_rev = NCR_VARIANT_FAS366;
break;
default:
/*
* We could just treat unknown chips
* as ESP200 but then we would most
* likely drive them out of specs.
*/
device_printf(esc->sc_dev,
"Unknown chip\n");
goto fail_lsi;
}
}
}
}
#ifdef ESP_SBUS_DEBUG
printf("%s: revision %d, uid 0x%x\n", __func__, sc->sc_rev, uid);
#endif
/*
* XXX minsync and maxxfer _should_ be set up in MI code,
* XXX but it appears to have some dependency on what sort
* XXX of DMA we're hooked up to, etc.
*/
/*
* This is the value used to start sync negotiations
* Note that the NCR register "SYNCTP" is programmed
* in "clocks per byte", and has a minimum value of 4.
* The SCSI period used in negotiation is one-fourth
* of the time (in nanoseconds) needed to transfer one byte.
* Since the chip's clock is given in MHz, we have the following
* formula: 4 * period = (1000 / freq) * 4
*/
sc->sc_minsync = 1000 / sc->sc_freq;
sc->sc_maxoffset = 15;
sc->sc_extended_geom = 1;
/*
* Alas, we must now modify the value a bit, because it's
* only valid when can switch on FASTCLK and FASTSCSI bits
* in config register 3...
*/
switch (sc->sc_rev) {
case NCR_VARIANT_ESP100:
sc->sc_maxwidth = MSG_EXT_WDTR_BUS_8_BIT;
sc->sc_maxxfer = 64 * 1024;
sc->sc_minsync = 0; /* No synch on old chip? */
break;
case NCR_VARIANT_ESP100A:
sc->sc_maxwidth = MSG_EXT_WDTR_BUS_8_BIT;
sc->sc_maxxfer = 64 * 1024;
/* Min clocks/byte is 5 */
sc->sc_minsync = ncr53c9x_cpb2stp(sc, 5);
break;
case NCR_VARIANT_ESP200:
sc->sc_maxwidth = MSG_EXT_WDTR_BUS_8_BIT;
sc->sc_maxxfer = 16 * 1024 * 1024;
/* Min clocks/byte is 5 */
sc->sc_minsync = ncr53c9x_cpb2stp(sc, 5);
break;
case NCR_VARIANT_FAS100A:
case NCR_VARIANT_FAS216:
case NCR_VARIANT_FAS236:
/*
* The onboard SCSI chips in Sun Ultra 1 are actually
* documented to be NCR53C9X which use NCRCFG3_FCLK and
* NCRCFG3_FSCSI. BSD/OS however probes these chips as
* FAS100A and uses NCRF9XCFG3_FCLK and NCRF9XCFG3_FSCSI
* instead which seems to be correct as otherwise sync
* negotiation just doesn't work. Using NCRF9XCFG3_FCLK
* and NCRF9XCFG3_FSCSI with these chips in fact also
* yields Fast-SCSI speed.
*/
sc->sc_features = NCR_F_FASTSCSI;
sc->sc_cfg3 = NCRF9XCFG3_FCLK;
sc->sc_cfg3_fscsi = NCRF9XCFG3_FSCSI;
sc->sc_maxwidth = MSG_EXT_WDTR_BUS_8_BIT;
sc->sc_maxxfer = 16 * 1024 * 1024;
break;
case NCR_VARIANT_FAS366:
sc->sc_maxwidth = MSG_EXT_WDTR_BUS_16_BIT;
sc->sc_maxxfer = 16 * 1024 * 1024;
break;
}
/* Establish interrupt channel. */
i = 0;
if ((esc->sc_irqres = bus_alloc_resource_any(esc->sc_dev, SYS_RES_IRQ,
&i, RF_SHAREABLE|RF_ACTIVE)) == NULL) {
device_printf(esc->sc_dev, "cannot allocate interrupt\n");
goto fail_lsi;
}
if (bus_setup_intr(esc->sc_dev, esc->sc_irqres,
INTR_MPSAFE | INTR_TYPE_CAM, NULL, ncr53c9x_intr, sc,
&esc->sc_irq)) {
device_printf(esc->sc_dev, "cannot set up interrupt\n");
error = ENXIO;
goto fail_ires;
}
/* Turn on target selection using the `DMA' method. */
if (sc->sc_rev != NCR_VARIANT_FAS366)
sc->sc_features |= NCR_F_DMASELECT;
/* Do the common parts of attachment. */
sc->sc_dev = esc->sc_dev;
error = ncr53c9x_attach(sc);
if (error != 0) {
device_printf(esc->sc_dev, "ncr53c9x_attach failed\n");
goto fail_intr;
}
return (0);
fail_intr:
bus_teardown_intr(esc->sc_dev, esc->sc_irqres, esc->sc_irq);
fail_ires:
bus_release_resource(esc->sc_dev, SYS_RES_IRQ,
rman_get_rid(esc->sc_irqres), esc->sc_irqres);
fail_lsi:
lsi64854_detach(esc->sc_dma);
fail_lock:
NCR_LOCK_DESTROY(sc);
return (error);
}
