2003-09-02 19:16:48 +02:00
|
|
|
#include <bitops.h>
|
|
|
|
#include <console/console.h>
|
|
|
|
#include <device/device.h>
|
|
|
|
#include <device/path.h>
|
|
|
|
#include <device/pci.h>
|
2003-09-04 05:00:54 +02:00
|
|
|
#include <device/hypertransport.h>
|
2003-10-11 08:20:25 +02:00
|
|
|
#include <device/chip.h>
|
2003-09-02 19:16:48 +02:00
|
|
|
#include <part/hard_reset.h>
|
|
|
|
#include <part/fallback_boot.h>
|
|
|
|
|
|
|
|
static device_t ht_scan_get_devs(device_t *old_devices)
|
|
|
|
{
|
|
|
|
device_t first, last;
|
|
|
|
first = *old_devices;
|
|
|
|
last = first;
|
|
|
|
while(last && last->sibling &&
|
2003-10-14 04:36:51 +02:00
|
|
|
(last->sibling->path.type == DEVICE_PATH_PCI) &&
|
2003-09-02 19:16:48 +02:00
|
|
|
(last->sibling->path.u.pci.devfn > last->path.u.pci.devfn)) {
|
|
|
|
last = last->sibling;
|
|
|
|
}
|
|
|
|
if (first) {
|
|
|
|
*old_devices = last->sibling;
|
|
|
|
last->sibling = 0;
|
|
|
|
}
|
|
|
|
return first;
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
struct prev_link {
|
|
|
|
struct device *dev;
|
|
|
|
unsigned pos;
|
|
|
|
unsigned char config_off, freq_off, freq_cap_off;
|
|
|
|
};
|
|
|
|
|
|
|
|
static int ht_setup_link(struct prev_link *prev, device_t dev, unsigned pos)
|
|
|
|
{
|
|
|
|
static const uint8_t link_width_to_pow2[]= { 3, 4, 0, 5, 1, 2, 0, 0 };
|
|
|
|
static const uint8_t pow2_to_link_width[] = { 0x7, 4, 5, 0, 1, 3 };
|
|
|
|
unsigned present_width_cap, upstream_width_cap;
|
|
|
|
unsigned present_freq_cap, upstream_freq_cap;
|
|
|
|
unsigned ln_present_width_in, ln_upstream_width_in;
|
|
|
|
unsigned ln_present_width_out, ln_upstream_width_out;
|
|
|
|
unsigned freq, old_freq;
|
|
|
|
unsigned present_width, upstream_width, old_width;
|
|
|
|
int reset_needed;
|
|
|
|
|
|
|
|
/* Set the hypertransport link width and frequency */
|
|
|
|
reset_needed = 0;
|
|
|
|
|
|
|
|
/* Read the capabilities */
|
|
|
|
present_freq_cap = pci_read_config16(dev, pos + PCI_HT_CAP_SLAVE_FREQ_CAP0);
|
|
|
|
upstream_freq_cap = pci_read_config16(prev->dev, prev->pos + prev->freq_cap_off);
|
|
|
|
present_width_cap = pci_read_config8(dev, pos + PCI_HT_CAP_SLAVE_WIDTH0);
|
|
|
|
upstream_width_cap = pci_read_config8(prev->dev, prev->pos + prev->config_off);
|
|
|
|
|
|
|
|
/* Calculate the highest useable frequency */
|
|
|
|
#if 0
|
|
|
|
freq = log2(present_freq_cap & upstream_freq_cap);
|
|
|
|
#else
|
|
|
|
/* Errata for 8131 - freq 5 has hardware problems don't support it */
|
|
|
|
freq = log2(present_freq_cap & upstream_freq_cap & 0x1f);
|
|
|
|
#endif
|
|
|
|
|
|
|
|
/* Calculate the highest width */
|
|
|
|
ln_upstream_width_in = link_width_to_pow2[upstream_width_cap & 7];
|
|
|
|
ln_present_width_out = link_width_to_pow2[(present_width_cap >> 4) & 7];
|
|
|
|
if (ln_upstream_width_in > ln_present_width_out) {
|
|
|
|
ln_upstream_width_in = ln_present_width_out;
|
|
|
|
}
|
|
|
|
upstream_width = pow2_to_link_width[ln_upstream_width_in];
|
|
|
|
present_width = pow2_to_link_width[ln_upstream_width_in] << 4;
|
|
|
|
|
|
|
|
ln_upstream_width_out = link_width_to_pow2[(upstream_width_cap >> 4) & 7];
|
|
|
|
ln_present_width_in = link_width_to_pow2[present_width_cap & 7];
|
|
|
|
if (ln_upstream_width_out > ln_present_width_in) {
|
|
|
|
ln_upstream_width_out = ln_present_width_in;
|
|
|
|
}
|
|
|
|
upstream_width |= pow2_to_link_width[ln_upstream_width_out] << 4;
|
|
|
|
present_width |= pow2_to_link_width[ln_upstream_width_out];
|
|
|
|
|
|
|
|
/* Set the current device */
|
|
|
|
old_freq = pci_read_config8(dev, pos + PCI_HT_CAP_SLAVE_FREQ0);
|
|
|
|
if (freq != old_freq) {
|
|
|
|
pci_write_config8(dev, pos + PCI_HT_CAP_SLAVE_FREQ0, freq);
|
|
|
|
reset_needed = 1;
|
|
|
|
printk_spew("HyperT FreqP old %x new %x\n",old_freq,freq);
|
|
|
|
}
|
|
|
|
old_width = pci_read_config8(dev, pos + PCI_HT_CAP_SLAVE_WIDTH0 + 1);
|
|
|
|
if (present_width != old_width) {
|
|
|
|
pci_write_config8(dev, pos + PCI_HT_CAP_SLAVE_WIDTH0 + 1, present_width);
|
|
|
|
reset_needed = 1;
|
|
|
|
printk_spew("HyperT widthP old %x new %x\n",old_width, present_width);
|
|
|
|
}
|
|
|
|
|
|
|
|
/* Set the upstream device */
|
|
|
|
old_freq = pci_read_config8(prev->dev, prev->pos + prev->freq_off);
|
|
|
|
old_freq &= 0x0f;
|
|
|
|
if (freq != old_freq) {
|
|
|
|
pci_write_config8(prev->dev, prev->pos + prev->freq_off, freq);
|
|
|
|
reset_needed = 1;
|
|
|
|
printk_spew("HyperT freqU old %x new %x\n", old_freq, freq);
|
|
|
|
}
|
|
|
|
old_width = pci_read_config8(prev->dev, prev->pos + prev->config_off + 1);
|
|
|
|
if (upstream_width != old_width) {
|
|
|
|
pci_write_config8(prev->dev, prev->pos + prev->config_off + 1, upstream_width);
|
|
|
|
reset_needed = 1;
|
|
|
|
printk_spew("HyperT widthU old %x new %x\n", old_width, upstream_width);
|
|
|
|
}
|
|
|
|
|
|
|
|
/* Remember the current link as the previous link */
|
|
|
|
prev->dev = dev;
|
|
|
|
prev->pos = pos;
|
|
|
|
prev->config_off = PCI_HT_CAP_SLAVE_WIDTH1;
|
|
|
|
prev->freq_off = PCI_HT_CAP_SLAVE_FREQ1;
|
|
|
|
prev->freq_cap_off = PCI_HT_CAP_SLAVE_FREQ_CAP1;
|
|
|
|
|
|
|
|
return reset_needed;
|
|
|
|
|
|
|
|
}
|
|
|
|
|
|
|
|
static unsigned ht_lookup_slave_capability(struct device *dev)
|
|
|
|
{
|
|
|
|
unsigned pos;
|
|
|
|
pos = 0;
|
|
|
|
switch(dev->hdr_type & 0x7f) {
|
|
|
|
case PCI_HEADER_TYPE_NORMAL:
|
|
|
|
case PCI_HEADER_TYPE_BRIDGE:
|
|
|
|
pos = PCI_CAPABILITY_LIST;
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
if (pos > PCI_CAP_LIST_NEXT) {
|
|
|
|
pos = pci_read_config8(dev, pos);
|
|
|
|
}
|
|
|
|
while(pos != 0) { /* loop through the linked list */
|
|
|
|
uint8_t cap;
|
|
|
|
cap = pci_read_config8(dev, pos + PCI_CAP_LIST_ID);
|
|
|
|
printk_spew("Capability: 0x%02x @ 0x%02x\n", cap, pos);
|
|
|
|
if (cap == PCI_CAP_ID_HT) {
|
|
|
|
unsigned flags;
|
|
|
|
flags = pci_read_config16(dev, pos + PCI_CAP_FLAGS);
|
|
|
|
printk_spew("flags: 0x%04x\n", (unsigned)flags);
|
|
|
|
if ((flags >> 13) == 0) {
|
|
|
|
/* Entry is a Slave secondary, success...*/
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
if(pos) {
|
|
|
|
pos = pci_read_config8(dev, pos + PCI_CAP_LIST_NEXT);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
return pos;
|
|
|
|
}
|
|
|
|
|
|
|
|
static void ht_collapse_early_enumeration(struct bus *bus)
|
|
|
|
{
|
|
|
|
unsigned int devfn;
|
|
|
|
|
|
|
|
/* Spin through the devices and collapse any early
|
|
|
|
* hypertransport enumeration.
|
|
|
|
*/
|
|
|
|
for(devfn = 0; devfn <= 0xff; devfn += 8) {
|
|
|
|
struct device dummy;
|
|
|
|
uint32_t id;
|
|
|
|
unsigned pos, flags;
|
|
|
|
dummy.bus = bus;
|
|
|
|
dummy.path.type = DEVICE_PATH_PCI;
|
|
|
|
dummy.path.u.pci.devfn = devfn;
|
|
|
|
id = pci_read_config32(&dummy, PCI_VENDOR_ID);
|
|
|
|
if (id == 0xffffffff || id == 0x00000000 ||
|
|
|
|
id == 0x0000ffff || id == 0xffff0000) {
|
|
|
|
continue;
|
|
|
|
}
|
|
|
|
dummy.vendor = id & 0xffff;
|
|
|
|
dummy.device = (id >> 16) & 0xffff;
|
|
|
|
dummy.hdr_type = pci_read_config8(&dummy, PCI_HEADER_TYPE);
|
|
|
|
pos = ht_lookup_slave_capability(&dummy);
|
|
|
|
if (!pos){
|
|
|
|
continue;
|
|
|
|
}
|
|
|
|
|
|
|
|
/* Clear the unitid */
|
|
|
|
flags = pci_read_config16(&dummy, pos + PCI_CAP_FLAGS);
|
|
|
|
flags &= ~0x1f;
|
|
|
|
pci_write_config16(&dummy, pos + PCI_CAP_FLAGS, flags);
|
|
|
|
printk_spew("Collapsing %s [%04x/%04x]\n",
|
|
|
|
dev_path(&dummy), dummy.vendor, dummy.device);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
unsigned int hypertransport_scan_chain(struct bus *bus, unsigned int max)
|
|
|
|
{
|
|
|
|
unsigned next_unitid, last_unitid, previous_unitid;
|
|
|
|
uint8_t previous_pos;
|
|
|
|
device_t old_devices, dev, func, *chain_last;
|
|
|
|
unsigned min_unitid = 1;
|
|
|
|
int reset_needed;
|
|
|
|
struct prev_link prev;
|
|
|
|
|
|
|
|
/* Restore the hypertransport chain to it's unitialized state */
|
|
|
|
ht_collapse_early_enumeration(bus);
|
|
|
|
|
|
|
|
/* See which static device nodes I have */
|
|
|
|
old_devices = bus->children;
|
|
|
|
bus->children = 0;
|
|
|
|
chain_last = &bus->children;
|
|
|
|
|
|
|
|
/* Initialize the hypertransport enumeration state */
|
|
|
|
reset_needed = 0;
|
|
|
|
prev.dev = bus->dev;
|
|
|
|
prev.pos = bus->cap;
|
|
|
|
prev.config_off = PCI_HT_CAP_HOST_WIDTH;
|
|
|
|
prev.freq_off = PCI_HT_CAP_HOST_FREQ;
|
|
|
|
prev.freq_cap_off = PCI_HT_CAP_HOST_FREQ_CAP;
|
|
|
|
|
|
|
|
/* If present assign unitid to a hypertransport chain */
|
|
|
|
last_unitid = min_unitid -1;
|
|
|
|
next_unitid = min_unitid;
|
|
|
|
previous_pos = 0;
|
|
|
|
do {
|
|
|
|
uint32_t id, class;
|
|
|
|
uint8_t hdr_type, pos;
|
|
|
|
uint16_t flags;
|
|
|
|
unsigned count, static_count;
|
|
|
|
|
|
|
|
previous_unitid = last_unitid;
|
|
|
|
last_unitid = next_unitid;
|
|
|
|
|
|
|
|
/* Get setup the device_structure */
|
|
|
|
dev = ht_scan_get_devs(&old_devices);
|
|
|
|
|
|
|
|
if (!dev) {
|
|
|
|
struct device dummy;
|
|
|
|
dummy.bus = bus;
|
|
|
|
dummy.path.type = DEVICE_PATH_PCI;
|
|
|
|
dummy.path.u.pci.devfn = 0;
|
|
|
|
id = pci_read_config32(&dummy, PCI_VENDOR_ID);
|
|
|
|
/* If the chain is fully enumerated quit */
|
|
|
|
if (id == 0xffffffff || id == 0x00000000 ||
|
|
|
|
id == 0x0000ffff || id == 0xffff0000) {
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
dev = alloc_dev(bus, &dummy.path);
|
|
|
|
}
|
|
|
|
else {
|
|
|
|
/* Add this device to the pci bus chain */
|
|
|
|
*chain_last = dev;
|
|
|
|
/* Run the magice enable/disable sequence for the device */
|
2003-10-11 08:20:25 +02:00
|
|
|
if (dev->chip && dev->chip->control && dev->chip->control->enable_dev) {
|
|
|
|
dev->chip->control->enable_dev(dev);
|
2003-09-02 19:16:48 +02:00
|
|
|
}
|
|
|
|
/* Now read the vendor and device id */
|
|
|
|
id = pci_read_config32(dev, PCI_VENDOR_ID);
|
2003-10-11 08:20:25 +02:00
|
|
|
|
|
|
|
/* If the chain is fully enumerated quit */
|
|
|
|
if (id == 0xffffffff || id == 0x00000000 ||
|
|
|
|
id == 0x0000ffff || id == 0xffff0000) {
|
|
|
|
printk_err("Missing static device: %s\n",
|
|
|
|
dev_path(dev));
|
|
|
|
break;
|
|
|
|
}
|
2003-09-02 19:16:48 +02:00
|
|
|
}
|
|
|
|
/* Update the device chain tail */
|
|
|
|
for(func = dev; func; func = func->sibling) {
|
|
|
|
chain_last = &func->sibling;
|
|
|
|
}
|
|
|
|
|
|
|
|
/* Read the rest of the pci configuration information */
|
|
|
|
hdr_type = pci_read_config8(dev, PCI_HEADER_TYPE);
|
|
|
|
class = pci_read_config32(dev, PCI_CLASS_REVISION);
|
|
|
|
|
|
|
|
/* Store the interesting information in the device structure */
|
|
|
|
dev->vendor = id & 0xffff;
|
|
|
|
dev->device = (id >> 16) & 0xffff;
|
|
|
|
dev->hdr_type = hdr_type;
|
|
|
|
/* class code, the upper 3 bytes of PCI_CLASS_REVISION */
|
|
|
|
dev->class = class >> 8;
|
|
|
|
|
|
|
|
/* Find the hypertransport link capability */
|
|
|
|
pos = ht_lookup_slave_capability(dev);
|
|
|
|
if (pos == 0) {
|
2003-10-11 08:20:25 +02:00
|
|
|
printk_err("%s Hypertransport link capability not found",
|
|
|
|
dev_path(dev));
|
2003-09-02 19:16:48 +02:00
|
|
|
break;
|
|
|
|
}
|
|
|
|
|
|
|
|
/* Update the Unitid of the current device */
|
|
|
|
flags = pci_read_config16(dev, pos + PCI_CAP_FLAGS);
|
|
|
|
flags &= ~0x1f; /* mask out base Unit ID */
|
|
|
|
flags |= next_unitid & 0x1f;
|
|
|
|
pci_write_config16(dev, pos + PCI_CAP_FLAGS, flags);
|
|
|
|
|
|
|
|
/* Update the Unitd id in the device structure */
|
|
|
|
static_count = 1;
|
|
|
|
for(func = dev; func; func = func->sibling) {
|
|
|
|
func->path.u.pci.devfn += (next_unitid << 3);
|
|
|
|
static_count = (func->path.u.pci.devfn >> 3)
|
|
|
|
- (dev->path.u.pci.devfn >> 3) + 1;
|
|
|
|
}
|
|
|
|
|
|
|
|
/* Compute the number of unitids consumed */
|
|
|
|
count = (flags >> 5) & 0x1f; /* get unit count */
|
|
|
|
printk_spew("%s count: %04x static_count: %04x\n",
|
|
|
|
dev_path(dev), count, static_count);
|
|
|
|
if (count < static_count) {
|
|
|
|
count = static_count;
|
|
|
|
}
|
|
|
|
|
|
|
|
/* Update the Unitid of the next device */
|
|
|
|
next_unitid += count;
|
|
|
|
|
|
|
|
/* Setup the hypetransport link */
|
|
|
|
reset_needed |= ht_setup_link(&prev, dev, pos);
|
|
|
|
|
|
|
|
printk_debug("%s [%04x/%04x] %s next_unitid: %04x\n",
|
|
|
|
dev_path(dev),
|
|
|
|
dev->vendor, dev->device,
|
|
|
|
(dev->enable? "enabled": "disabled"), next_unitid);
|
|
|
|
|
|
|
|
} while((last_unitid != next_unitid) && (next_unitid <= 0x1f));
|
|
|
|
#if HAVE_HARD_RESET == 1
|
|
|
|
if(reset_needed) {
|
|
|
|
printk_info("HyperT reset needed\n");
|
|
|
|
hard_reset();
|
|
|
|
}
|
|
|
|
printk_debug("HyperT reset not needed\n");
|
|
|
|
#endif
|
|
|
|
if (next_unitid > 0x1f) {
|
|
|
|
next_unitid = 0x1f;
|
|
|
|
}
|
|
|
|
return pci_scan_bus(bus, 0x00, (next_unitid << 3)|7, max);
|
|
|
|
}
|