diff options
Diffstat (limited to 'src/southbridge/amd/agesa/hudson/lpc.c')
| -rw-r--r-- | src/southbridge/amd/agesa/hudson/lpc.c | 174 |
1 files changed, 173 insertions, 1 deletions
diff --git a/src/southbridge/amd/agesa/hudson/lpc.c b/src/southbridge/amd/agesa/hudson/lpc.c index 3af3eb8..a0dc072 100644 --- a/src/southbridge/amd/agesa/hudson/lpc.c +++ b/src/southbridge/amd/agesa/hudson/lpc.c @@ -129,8 +129,180 @@ static void hudson_lpc_set_resources(struct device *dev) */ static void hudson_lpc_enable_childrens_resources(device_t dev) { - printk(BIOS_DEBUG, "hudson_lpc_enable_childrens_resources\n"); + struct bus *link; + u32 reg, reg_x; + int var_num = 0; + u16 reg_var[3]; + u16 reg_size[1] = {512}; + u8 wiosize = pci_read_config8(dev, 0x74); + /* Be bit relaxed, tolerate that LPC region might be bigger than resource we try to fit, + * do it like this for all regions < 16 bytes. If there is a resource > 16 bytes + * it must be 512 bytes to be able to allocate the fresh LPC window. + * + * AGESA likes to enable already one LPC region in wide port base 0x64-0x65, + * using DFLT_SIO_PME_BASE_ADDRESS, 512 bytes size + * The code tries to check if resource can fit into this region + */ + + reg = pci_read_config32(dev, 0x44); + reg_x = pci_read_config32(dev, 0x48); + + /* check if ranges are free and not use them if entry is just already taken */ + if (reg_x & (1 << 2)) + var_num = 1; + /* just in case check if someone did not manually set other ranges too */ + if (reg_x & (1 << 24)) + var_num = 2; + + if (reg_x & (1 << 25)) + var_num = 3; + + /* check AGESA region size */ + if (wiosize & (1 << 0)) + reg_size[0] = 16; + + reg_var[2] = pci_read_config16(dev, 0x90); + reg_var[1] = pci_read_config16(dev, 0x66); + reg_var[0] = pci_read_config16(dev, 0x64); + + for (link = dev->link_list; link; link = link->next) { + device_t child; + for (child = link->children; child; + child = child->sibling) { + if (child->enabled + && (child->path.type == DEVICE_PATH_PNP)) { + struct resource *res; + for (res = child->resource_list; res; res = res->next) { + u32 base, end; /* don't need long long */ + u32 rsize, set = 0, set_x = 0; + if (!(res->flags & IORESOURCE_IO)) + continue; + base = res->base; + end = resource_end(res); + /* find a resource size */ + printk(BIOS_DEBUG, "hudson lpc decode:%s, base=0x%08x, end=0x%08x\n", + dev_path(child), base, end); + switch (base) { + case 0x60: /* KB */ + case 0x64: /* MS */ + set |= (1 << 29); + rsize = 1; + break; + case 0x3f8: /* COM1 */ + set |= (1 << 6); + rsize = 8; + break; + case 0x2f8: /* COM2 */ + set |= (1 << 7); + rsize = 8; + break; + case 0x378: /* Parallel 1 */ + set |= (1 << 0); + set |= (1 << 1); /* + 0x778 for ECP */ + rsize = 8; + break; + case 0x3f0: /* FD0 */ + set |= (1 << 26); + rsize = 8; + break; + case 0x220: /* 0x220 - 0x227 */ + set |= (1 << 8); + rsize = 8; + break; + case 0x228: /* 0x228 - 0x22f */ + set |= (1 << 9); + rsize = 8; + break; + case 0x238: /* 0x238 - 0x23f */ + set |= (1 << 10); + rsize = 8; + break; + case 0x300: /* 0x300 -0x301 */ + set |= (1 << 18); + rsize = 2; + break; + case 0x400: + set_x |= (1 << 16); + rsize = 0x40; + break; + case 0x480: + set_x |= (1 << 17); + rsize = 0x40; + case 0x500: + set_x |= (1 << 18); + rsize = 0x40; + break; + case 0x580: + set_x |= (1 << 19); + rsize = 0x40; + break; + case 0x4700: + set_x |= (1 << 22); + rsize = 0xc; + break; + case 0xfd60: + set_x |= (1 << 23); + rsize = 16; + break; + default: + rsize = 0; + /* try AGESA allocated region in region 0 */ + if ((var_num > 0) && ((base >=reg_var[0]) && + ((base + res->size) <= (reg_var[0] + reg_size[0])))) + rsize = reg_size[0]; + } + /* check if region found and matches the enable */ + if (res->size <= rsize) { + reg |= set; + reg_x |= set_x; + /* check if we can fit resource in variable range */ + } else if ((var_num < 3) && + ((res->size <= 16) || (res->size == 512))) { + /* use variable ranges if pre-defined do not match */ + switch (var_num) { + case 0: + reg_x |= (1 << 2); + if (res->size <= 16) { + wiosize |= (1 << 0); + } + break; + case 1: + reg_x |= (1 << 24); + if (res->size <= 16) + wiosize |= (1 << 2); + break; + case 2: + reg_x |= (1 << 25); + if (res->size <= 16) + wiosize |= (1 << 3); + break; + } + reg_var[var_num++] = + base & 0xffff; + } else { + printk(BIOS_ERR, "cannot fit LPC decode region:%s, base=0x%08x, end=0x%08x\n", + dev_path(child), base, end); + } + } + } + } + } + pci_write_config32(dev, 0x44, reg); + pci_write_config32(dev, 0x48, reg_x); + /* Set WideIO for as many IOs found (fall through is on purpose) */ + switch (var_num) { + case 3: + pci_write_config16(dev, 0x90, reg_var[2]); + /* fall through */ + case 2: + pci_write_config16(dev, 0x66, reg_var[1]); + /* fall through */ + case 1: + pci_write_config16(dev, 0x64, reg_var[0]); + break; + } + pci_write_config8(dev, 0x74, wiosize); } static void hudson_lpc_enable_resources(device_t dev) |
