diff options
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/pci/fsl_pci_init.c | 225 |
1 files changed, 162 insertions, 63 deletions
diff --git a/drivers/pci/fsl_pci_init.c b/drivers/pci/fsl_pci_init.c index f9c0752..ee89aaa 100644 --- a/drivers/pci/fsl_pci_init.c +++ b/drivers/pci/fsl_pci_init.c @@ -35,6 +35,7 @@ DECLARE_GLOBAL_DATA_PTR; */ #include <pci.h> +#include <asm/io.h> #include <asm/fsl_pci.h> /* Freescale-specific PCI config registers */ @@ -60,35 +61,98 @@ void pciauto_config_init(struct pci_controller *hose); #define CONFIG_SYS_PCI64_MEMORY_BUS (64ull*1024*1024*1024) #endif -static int fsl_pci_setup_inbound_windows(struct pci_region *r) +/* Setup one inbound ATMU window. + * + * We let the caller decide what the window size should be + */ +static void set_inbound_window(volatile pit_t *pi, + struct pci_region *r, + u64 size) { - struct pci_region *rgn_base = r; - u64 sz = min((u64)gd->ram_size, (1ull << 32) - 1); + u32 sz = (__ilog2_u64(size) - 1); + u32 flag = PIWAR_EN | PIWAR_LOCAL | + PIWAR_READ_SNOOP | PIWAR_WRITE_SNOOP; + + out_be32(&pi->pitar, r->phys_start >> 12); + out_be32(&pi->piwbar, r->bus_start >> 12); +#ifdef CONFIG_SYS_PCI_64BIT + out_be32(&pi->piwbear, r->bus_start >> 44); +#else + out_be32(&pi->piwbear, 0); +#endif + if (r->flags & PCI_REGION_PREFETCH) + flag |= PIWAR_PF; + out_be32(&pi->piwar, flag | sz); +} + +static int fsl_pci_setup_inbound_windows(struct pci_controller *hose, + u64 out_lo, u8 pcie_cap, + volatile pit_t *pi) +{ + struct pci_region *r = hose->regions + hose->region_count; + u64 sz = min((u64)gd->ram_size, (1ull << 32)); phys_addr_t phys_start = CONFIG_SYS_PCI_MEMORY_PHYS; pci_addr_t bus_start = CONFIG_SYS_PCI_MEMORY_BUS; - pci_size_t pci_sz = 1ull << __ilog2_u64(sz); + pci_size_t pci_sz; - debug ("R0 bus_start: %llx phys_start: %llx size: %llx\n", - (u64)bus_start, (u64)phys_start, (u64)pci_sz); - pci_set_region(r++, bus_start, phys_start, pci_sz, - PCI_REGION_MEM | PCI_REGION_SYS_MEMORY | - PCI_REGION_PREFETCH); + /* we have no space available for inbound memory mapping */ + if (bus_start > out_lo) { + printf ("no space for inbound mapping of memory\n"); + return 0; + } - sz -= pci_sz; - bus_start += pci_sz; - phys_start += pci_sz; + /* limit size */ + if ((bus_start + sz) > out_lo) { + sz = out_lo - bus_start; + debug ("limiting size to %llx\n", sz); + } pci_sz = 1ull << __ilog2_u64(sz); - if (sz) { - debug ("R1 bus_start: %llx phys_start: %llx size: %llx\n", + /* + * we can overlap inbound/outbound windows on PCI-E since RX & TX + * links a separate + */ + if ((pcie_cap == PCI_CAP_ID_EXP) && (pci_sz < sz)) { + debug ("R0 bus_start: %llx phys_start: %llx size: %llx\n", + (u64)bus_start, (u64)phys_start, (u64)sz); + pci_set_region(r, bus_start, phys_start, sz, + PCI_REGION_MEM | PCI_REGION_SYS_MEMORY | + PCI_REGION_PREFETCH); + + /* if we aren't an exact power of two match, pci_sz is smaller + * round it up to the next power of two. We report the actual + * size to pci region tracking. + */ + if (pci_sz != sz) + sz = 2ull << __ilog2_u64(sz); + + set_inbound_window(pi--, r++, sz); + sz = 0; /* make sure we dont set the R2 window */ + } else { + debug ("R0 bus_start: %llx phys_start: %llx size: %llx\n", (u64)bus_start, (u64)phys_start, (u64)pci_sz); - pci_set_region(r++, bus_start, phys_start, pci_sz, + pci_set_region(r, bus_start, phys_start, pci_sz, PCI_REGION_MEM | PCI_REGION_SYS_MEMORY | PCI_REGION_PREFETCH); + set_inbound_window(pi--, r++, pci_sz); + sz -= pci_sz; bus_start += pci_sz; phys_start += pci_sz; + + pci_sz = 1ull << __ilog2_u64(sz); + if (sz) { + debug ("R1 bus_start: %llx phys_start: %llx size: %llx\n", + (u64)bus_start, (u64)phys_start, (u64)pci_sz); + pci_set_region(r, bus_start, phys_start, pci_sz, + PCI_REGION_MEM | PCI_REGION_SYS_MEMORY | + PCI_REGION_PREFETCH); + set_inbound_window(pi--, r++, pci_sz); + sz -= pci_sz; + bus_start += pci_sz; + phys_start += pci_sz; + } } #if defined(CONFIG_PHYS_64BIT) && defined(CONFIG_SYS_PCI_64BIT) @@ -104,23 +168,25 @@ static int fsl_pci_setup_inbound_windows(struct pci_region *r) (u64)CONFIG_SYS_PCI64_MEMORY_BUS, (u64)CONFIG_SYS_PCI_MEMORY_PHYS, (u64)pci_sz); - pci_set_region(r++, + pci_set_region(r, CONFIG_SYS_PCI64_MEMORY_BUS, CONFIG_SYS_PCI_MEMORY_PHYS, pci_sz, PCI_REGION_MEM | PCI_REGION_SYS_MEMORY | PCI_REGION_PREFETCH); + set_inbound_window(pi--, r++, pci_sz); #else pci_sz = 1ull << __ilog2_u64(sz); if (sz) { debug ("R2 bus_start: %llx phys_start: %llx size: %llx\n", (u64)bus_start, (u64)phys_start, (u64)pci_sz); - pci_set_region(r++, bus_start, phys_start, pci_sz, + pci_set_region(r, bus_start, phys_start, pci_sz, PCI_REGION_MEM | PCI_REGION_SYS_MEMORY | PCI_REGION_PREFETCH); sz -= pci_sz; bus_start += pci_sz; phys_start += pci_sz; + set_inbound_window(pi--, r++, pci_sz); } #endif @@ -130,7 +196,9 @@ static int fsl_pci_setup_inbound_windows(struct pci_region *r) "inbound windows -- %lld remaining\n", sz); #endif - return r - rgn_base; + hose->region_count = r - hose->regions; + + return 1; } void fsl_pci_init(struct pci_controller *hose, u32 cfg_addr, u32 cfg_data) @@ -146,7 +214,10 @@ void fsl_pci_init(struct pci_controller *hose, u32 cfg_addr, u32 cfg_data) /* Initialize ATMU registers based on hose regions and flags */ volatile pot_t *po = &pci->pot[1]; /* skip 0 */ - volatile pit_t *pi = &pci->pit[0]; /* ranges from: 3 to 1 */ + volatile pit_t *pi = &pci->pit[2]; /* ranges from: 3 to 1 */ + + u64 out_hi = 0, out_lo = -1ULL; + u32 pcicsrbar, pcicsrbar_sz; #ifdef DEBUG int neg_link_w; @@ -154,60 +225,81 @@ void fsl_pci_init(struct pci_controller *hose, u32 cfg_addr, u32 cfg_data) pci_setup_indirect(hose, cfg_addr, cfg_data); - /* inbound */ - reg += fsl_pci_setup_inbound_windows(reg); + /* Handle setup of outbound windows first */ + for (r = 0; r < hose->region_count; r++) { + unsigned long flags = hose->regions[r].flags; + u32 sz = (__ilog2_u64((u64)hose->regions[r].size) - 1); - hose->region_count = reg - hose->regions; + flags &= PCI_REGION_SYS_MEMORY|PCI_REGION_TYPE; + if (flags != PCI_REGION_SYS_MEMORY) { + u64 start = hose->regions[r].bus_start; + u64 end = start + hose->regions[r].size; - for (r=0; r<hose->region_count; r++) { - u32 sz = (__ilog2_u64((u64)hose->regions[r].size) - 1); - if (hose->regions[r].flags & PCI_REGION_SYS_MEMORY) { /* inbound */ - u32 flag = PIWAR_EN | PIWAR_LOCAL | - PIWAR_READ_SNOOP | PIWAR_WRITE_SNOOP; - pi->pitar = (hose->regions[r].phys_start >> 12); - pi->piwbar = (hose->regions[r].bus_start >> 12); -#ifdef CONFIG_SYS_PCI_64BIT - pi->piwbear = (hose->regions[r].bus_start >> 44); -#else - pi->piwbear = 0; -#endif - if (hose->regions[r].flags & PCI_REGION_PREFETCH) - flag |= PIWAR_PF; - pi->piwar = flag | sz; - pi++; - inbound = hose->regions[r].size > 0; - } else { /* Outbound */ - po->powbar = (hose->regions[r].phys_start >> 12); - po->potar = (hose->regions[r].bus_start >> 12); + out_be32(&po->powbar, hose->regions[r].phys_start >> 12); + out_be32(&po->potar, start >> 12); #ifdef CONFIG_SYS_PCI_64BIT - po->potear = (hose->regions[r].bus_start >> 44); + out_be32(&po->potear, start >> 44); #else - po->potear = 0; + out_be32(&po->potear, 0); #endif - if (hose->regions[r].flags & PCI_REGION_IO) - po->powar = POWAR_EN | sz | - POWAR_IO_READ | POWAR_IO_WRITE; - else - po->powar = POWAR_EN | sz | - POWAR_MEM_READ | POWAR_MEM_WRITE; + if (hose->regions[r].flags & PCI_REGION_IO) { + out_be32(&po->powar, POWAR_EN | sz | + POWAR_IO_READ | POWAR_IO_WRITE); + } else { + out_be32(&po->powar, POWAR_EN | sz | + POWAR_MEM_READ | POWAR_MEM_WRITE); + out_lo = min(start, out_lo); + out_hi = max(end, out_hi); + } po++; } } + debug("Outbound memory range: %llx:%llx\n", out_lo, out_hi); + + /* setup PCSRBAR/PEXCSRBAR */ + pci_hose_write_config_dword(hose, dev, PCI_BASE_ADDRESS_0, 0xffffffff); + pci_hose_read_config_dword (hose, dev, PCI_BASE_ADDRESS_0, &pcicsrbar_sz); + pcicsrbar_sz = ~pcicsrbar_sz + 1; + + if (out_hi < (0x100000000ull - pcicsrbar_sz) || + (out_lo > 0x100000000ull)) + pcicsrbar = 0x100000000ull - pcicsrbar_sz; + else + pcicsrbar = (out_lo - pcicsrbar_sz) & -pcicsrbar_sz; + pci_hose_write_config_dword(hose, dev, PCI_BASE_ADDRESS_0, pcicsrbar); + + out_lo = min(out_lo, (u64)pcicsrbar); + + debug("PCICSRBAR @ 0x%x\n", pcicsrbar); + + pci_set_region(reg++, pcicsrbar, CONFIG_SYS_CCSRBAR_PHYS, + pcicsrbar_sz, PCI_REGION_SYS_MEMORY); + hose->region_count++; /* see if we are a PCIe or PCI controller */ pci_hose_read_config_byte(hose, dev, FSL_PCIE_CAP_ID, &pcie_cap); + /* inbound */ + inbound = fsl_pci_setup_inbound_windows(hose, out_lo, pcie_cap, pi); + + for (r = 0; r < hose->region_count; r++) + debug("PCI reg:%d %016llx:%016llx %016llx %08x\n", r, + (u64)hose->regions[r].phys_start, + hose->regions[r].bus_start, + hose->regions[r].size, + hose->regions[r].flags); + pci_register_hose(hose); pciauto_config_init(hose); /* grab pci_{mem,prefetch,io} */ hose->current_busno = hose->first_busno; - pci->pedr = 0xffffffff; /* Clear any errors */ - pci->peer = ~0x20140; /* Enable All Error Interupts except + out_be32(&pci->pedr, 0xffffffff); /* Clear any errors */ + out_be32(&pci->peer, ~0x20140); /* Enable All Error Interupts except * - Master abort (pci) * - Master PERR (pci) * - ICCA (PCIe) */ - pci_hose_read_config_dword (hose, dev, PCI_DCR, &temp32); + pci_hose_read_config_dword(hose, dev, PCI_DCR, &temp32); temp32 |= 0xf000e; /* set URR, FER, NFER (but not CER) */ pci_hose_write_config_dword(hose, dev, PCI_DCR, temp32); @@ -218,14 +310,15 @@ void fsl_pci_init(struct pci_controller *hose, u32 cfg_addr, u32 cfg_data) #ifdef CONFIG_FSL_PCIE_RESET if (ltssm == 1) { int i; - debug("....PCIe link error. " - "LTSSM=0x%02x.", ltssm); - pci->pdb_stat |= 0x08000000; /* assert PCIe reset */ - temp32 = pci->pdb_stat; + debug("....PCIe link error. " "LTSSM=0x%02x.", ltssm); + /* assert PCIe reset */ + setbits_be32(&pci->pdb_stat, 0x08000000); + (void) in_be32(&pci->pdb_stat); udelay(100); debug(" Asserting PCIe reset @%x = %x\n", - &pci->pdb_stat, pci->pdb_stat); - pci->pdb_stat &= ~0x08000000; /* clear reset */ + &pci->pdb_stat, in_be32(&pci->pdb_stat)); + /* clear PCIe reset */ + clrbits_be32(&pci->pdb_stat, 0x08000000); asm("sync;isync"); for (i=0; i<100 && ltssm < PCI_LTSSM_L0; i++) { pci_hose_read_config_word(hose, dev, PCI_LTSSM, @@ -235,6 +328,12 @@ void fsl_pci_init(struct pci_controller *hose, u32 cfg_addr, u32 cfg_data) "LTSSM=0x%02x.\n", ltssm); } enabled = ltssm >= PCI_LTSSM_L0; + + /* we need to re-write the bar0 since a reset will + * clear it + */ + pci_hose_write_config_dword(hose, dev, + PCI_BASE_ADDRESS_0, pcicsrbar); } #endif @@ -245,8 +344,8 @@ void fsl_pci_init(struct pci_controller *hose, u32 cfg_addr, u32 cfg_data) return; } - pci->pme_msg_det = 0xffffffff; - pci->pme_msg_int_en = 0xffffffff; + out_be32(&pci->pme_msg_det, 0xffffffff); + out_be32(&pci->pme_msg_int_en, 0xffffffff); #ifdef DEBUG pci_hose_read_config_word(hose, dev, PCI_LSR, &temp16); neg_link_w = (temp16 & 0x3f0 ) >> 4; @@ -299,8 +398,8 @@ void fsl_pci_init(struct pci_controller *hose, u32 cfg_addr, u32 cfg_data) /* Clear all error indications */ if (pcie_cap == PCI_CAP_ID_EXP) - pci->pme_msg_det = 0xffffffff; - pci->pedr = 0xffffffff; + out_be32(&pci->pme_msg_det, 0xffffffff); + out_be32(&pci->pedr, 0xffffffff); pci_hose_read_config_word (hose, dev, PCI_DSR, &temp16); if (temp16) { |