diff options
Diffstat (limited to 'drivers/pci_auto.c')
| -rw-r--r-- | drivers/pci_auto.c | 381 |
1 files changed, 0 insertions, 381 deletions
diff --git a/drivers/pci_auto.c b/drivers/pci_auto.c deleted file mode 100644 index 969167555e..0000000000 --- a/drivers/pci_auto.c +++ /dev/null @@ -1,381 +0,0 @@ -/* - * arch/ppc/kernel/pci_auto.c - * - * PCI autoconfiguration library - * - * Author: Matt Porter <mporter@mvista.com> - * - * Copyright 2000 MontaVista Software Inc. - * - * This program is free software; you can redistribute it and/or modify it - * under the terms of the GNU General Public License as published by the - * Free Software Foundation; either version 2 of the License, or (at your - * option) any later version. - */ - -#include <common.h> - -#ifdef CONFIG_PCI - -#include <pci.h> - -#undef DEBUG -#ifdef DEBUG -#define DEBUGF(x...) printf(x) -#else -#define DEBUGF(x...) -#endif /* DEBUG */ - -#define PCIAUTO_IDE_MODE_MASK 0x05 - -/* - * - */ - -void pciauto_region_init(struct pci_region* res) -{ - res->bus_lower = res->bus_start; -} - -void pciauto_region_align(struct pci_region *res, unsigned long size) -{ - res->bus_lower = ((res->bus_lower - 1) | (size - 1)) + 1; -} - -int pciauto_region_allocate(struct pci_region* res, unsigned int size, unsigned int *bar) -{ - unsigned long addr; - - if (!res) { - DEBUGF("No resource"); - goto error; - } - - addr = ((res->bus_lower - 1) | (size - 1)) + 1; - - if (addr - res->bus_start + size > res->size) { - DEBUGF("No room in resource"); - goto error; - } - - res->bus_lower = addr + size; - - DEBUGF("address=0x%lx", addr); - - *bar = addr; - return 0; - - error: - *bar = 0xffffffff; - return -1; -} - -/* - * - */ - -void pciauto_setup_device(struct pci_controller *hose, - pci_dev_t dev, int bars_num, - struct pci_region *mem, - struct pci_region *prefetch, - struct pci_region *io) -{ - unsigned int bar_value, bar_response, bar_size; - unsigned int cmdstat = 0; - struct pci_region *bar_res; - int bar, bar_nr = 0; - int found_mem64 = 0; - - pci_hose_read_config_dword(hose, dev, PCI_COMMAND, &cmdstat); - cmdstat = (cmdstat & ~(PCI_COMMAND_IO | PCI_COMMAND_MEMORY)) | PCI_COMMAND_MASTER; - - for (bar = PCI_BASE_ADDRESS_0; bar <= PCI_BASE_ADDRESS_0 + (bars_num*4); bar += 4) { - /* Tickle the BAR and get the response */ - pci_hose_write_config_dword(hose, dev, bar, 0xffffffff); - pci_hose_read_config_dword(hose, dev, bar, &bar_response); - - /* If BAR is not implemented go to the next BAR */ - if (!bar_response) - continue; - - found_mem64 = 0; - - /* Check the BAR type and set our address mask */ - if (bar_response & PCI_BASE_ADDRESS_SPACE) { - bar_size = ((~(bar_response & PCI_BASE_ADDRESS_IO_MASK)) - & 0xffff) + 1; - bar_res = io; - - DEBUGF("PCI Autoconfig: BAR %d, I/O, size=0x%x, ", bar_nr, bar_size); - } else { - if ( (bar_response & PCI_BASE_ADDRESS_MEM_TYPE_MASK) == - PCI_BASE_ADDRESS_MEM_TYPE_64) - found_mem64 = 1; - - bar_size = ~(bar_response & PCI_BASE_ADDRESS_MEM_MASK) + 1; - if (prefetch && (bar_response & PCI_BASE_ADDRESS_MEM_PREFETCH)) - bar_res = prefetch; - else - bar_res = mem; - - DEBUGF("PCI Autoconfig: BAR %d, Mem, size=0x%x, ", bar_nr, bar_size); - } - - if (pciauto_region_allocate(bar_res, bar_size, &bar_value) == 0) { - /* Write it out and update our limit */ - pci_hose_write_config_dword(hose, dev, bar, bar_value); - - /* - * If we are a 64-bit decoder then increment to the - * upper 32 bits of the bar and force it to locate - * in the lower 4GB of memory. - */ - if (found_mem64) { - bar += 4; - pci_hose_write_config_dword(hose, dev, bar, 0x00000000); - } - - cmdstat |= (bar_response & PCI_BASE_ADDRESS_SPACE) ? - PCI_COMMAND_IO : PCI_COMMAND_MEMORY; - } - - DEBUGF("\n"); - - bar_nr++; - } - - pci_hose_write_config_dword(hose, dev, PCI_COMMAND, cmdstat); - pci_hose_write_config_byte(hose, dev, PCI_CACHE_LINE_SIZE, 0x08); - pci_hose_write_config_byte(hose, dev, PCI_LATENCY_TIMER, 0x80); -} - -static void pciauto_prescan_setup_bridge(struct pci_controller *hose, - pci_dev_t dev, int sub_bus) -{ - struct pci_region *pci_mem = hose->pci_mem; - struct pci_region *pci_prefetch = hose->pci_prefetch; - struct pci_region *pci_io = hose->pci_io; - unsigned int cmdstat; - - pci_hose_read_config_dword(hose, dev, PCI_COMMAND, &cmdstat); - - /* Configure bus number registers */ - pci_hose_write_config_byte(hose, dev, PCI_PRIMARY_BUS, PCI_BUS(dev)); - pci_hose_write_config_byte(hose, dev, PCI_SECONDARY_BUS, sub_bus); - pci_hose_write_config_byte(hose, dev, PCI_SUBORDINATE_BUS, 0xff); - - if (pci_mem) { - /* Round memory allocator to 1MB boundary */ - pciauto_region_align(pci_mem, 0x100000); - - /* Set up memory and I/O filter limits, assume 32-bit I/O space */ - pci_hose_write_config_word(hose, dev, PCI_MEMORY_BASE, - (pci_mem->bus_lower & 0xfff00000) >> 16); - - cmdstat |= PCI_COMMAND_MEMORY; - } - - if (pci_prefetch) { - /* Round memory allocator to 1MB boundary */ - pciauto_region_align(pci_prefetch, 0x100000); - - /* Set up memory and I/O filter limits, assume 32-bit I/O space */ - pci_hose_write_config_word(hose, dev, PCI_PREF_MEMORY_BASE, - (pci_prefetch->bus_lower & 0xfff00000) >> 16); - - cmdstat |= PCI_COMMAND_MEMORY; - } else { - /* We don't support prefetchable memory for now, so disable */ - pci_hose_write_config_word(hose, dev, PCI_PREF_MEMORY_BASE, 0x1000); - pci_hose_write_config_word(hose, dev, PCI_PREF_MEMORY_LIMIT, 0x0); - } - - if (pci_io) { - /* Round I/O allocator to 4KB boundary */ - pciauto_region_align(pci_io, 0x1000); - - pci_hose_write_config_byte(hose, dev, PCI_IO_BASE, - (pci_io->bus_lower & 0x0000f000) >> 8); - pci_hose_write_config_word(hose, dev, PCI_IO_BASE_UPPER16, - (pci_io->bus_lower & 0xffff0000) >> 16); - - cmdstat |= PCI_COMMAND_IO; - } - - /* Enable memory and I/O accesses, enable bus master */ - pci_hose_write_config_dword(hose, dev, PCI_COMMAND, cmdstat | PCI_COMMAND_MASTER); -} - -static void pciauto_postscan_setup_bridge(struct pci_controller *hose, - pci_dev_t dev, int sub_bus) -{ - struct pci_region *pci_mem = hose->pci_mem; - struct pci_region *pci_prefetch = hose->pci_prefetch; - struct pci_region *pci_io = hose->pci_io; - - /* Configure bus number registers */ - pci_hose_write_config_byte(hose, dev, PCI_SUBORDINATE_BUS, sub_bus); - - if (pci_mem) { - /* Round memory allocator to 1MB boundary */ - pciauto_region_align(pci_mem, 0x100000); - - pci_hose_write_config_word(hose, dev, PCI_MEMORY_LIMIT, - (pci_mem->bus_lower-1) >> 16); - } - - if (pci_prefetch) { - /* Round memory allocator to 1MB boundary */ - pciauto_region_align(pci_prefetch, 0x100000); - - pci_hose_write_config_word(hose, dev, PCI_PREF_MEMORY_LIMIT, - (pci_prefetch->bus_lower-1) >> 16); - } - - if (pci_io) { - /* Round I/O allocator to 4KB boundary */ - pciauto_region_align(pci_io, 0x1000); - - pci_hose_write_config_byte(hose, dev, PCI_IO_LIMIT, - ((pci_io->bus_lower-1) & 0x0000f000) >> 8); - pci_hose_write_config_word(hose, dev, PCI_IO_LIMIT_UPPER16, - ((pci_io->bus_lower-1) & 0xffff0000) >> 16); - } -} - -/* - * - */ - -void pciauto_config_init(struct pci_controller *hose) -{ - int i; - - hose->pci_io = hose->pci_mem = NULL; - - for (i=0; i<hose->region_count; i++) { - switch(hose->regions[i].flags) { - case PCI_REGION_IO: - if (!hose->pci_io || - hose->pci_io->size < hose->regions[i].size) - hose->pci_io = hose->regions + i; - break; - case PCI_REGION_MEM: - if (!hose->pci_mem || - hose->pci_mem->size < hose->regions[i].size) - hose->pci_mem = hose->regions + i; - break; - case (PCI_REGION_MEM | PCI_REGION_PREFETCH): - if (!hose->pci_prefetch || - hose->pci_prefetch->size < hose->regions[i].size) - hose->pci_prefetch = hose->regions + i; - break; - } - } - - - if (hose->pci_mem) { - pciauto_region_init(hose->pci_mem); - - DEBUGF("PCI Autoconfig: Memory region: [%lx-%lx]\n", - hose->pci_mem->bus_start, - hose->pci_mem->bus_start + hose->pci_mem->size - 1); - } - - if (hose->pci_prefetch) { - pciauto_region_init(hose->pci_prefetch); - - DEBUGF("PCI Autoconfig: Prefetchable Memory region: [%lx-%lx]\n", - hose->pci_prefetch->bus_start, - hose->pci_prefetch->bus_start + hose->pci_prefetch->size - 1); - } - - if (hose->pci_io) { - pciauto_region_init(hose->pci_io); - - DEBUGF("PCI Autoconfig: I/O region: [%lx-%lx]\n", - hose->pci_io->bus_start, - hose->pci_io->bus_start + hose->pci_io->size - 1); - } -} - -/* HJF: Changed this to return int. I think this is required - * to get the correct result when scanning bridges - */ -int pciauto_config_device(struct pci_controller *hose, pci_dev_t dev) -{ - unsigned int sub_bus = PCI_BUS(dev); - unsigned short class; - unsigned char prg_iface; - int n; - - pci_hose_read_config_word(hose, dev, PCI_CLASS_DEVICE, &class); - - switch(class) { - case PCI_CLASS_BRIDGE_PCI: - hose->current_busno++; - pciauto_setup_device(hose, dev, 2, hose->pci_mem, hose->pci_prefetch, hose->pci_io); - - DEBUGF("PCI Autoconfig: Found P2P bridge, device %d\n", PCI_DEV(dev)); - - /* Passing in current_busno allows for sibling P2P bridges */ - pciauto_prescan_setup_bridge(hose, dev, hose->current_busno); - /* - * need to figure out if this is a subordinate bridge on the bus - * to be able to properly set the pri/sec/sub bridge registers. - */ - n = pci_hose_scan_bus(hose, hose->current_busno); - - /* figure out the deepest we've gone for this leg */ - sub_bus = max(n, sub_bus); - pciauto_postscan_setup_bridge(hose, dev, sub_bus); - - sub_bus = hose->current_busno; - break; - - case PCI_CLASS_STORAGE_IDE: - pci_hose_read_config_byte(hose, dev, PCI_CLASS_PROG, &prg_iface); - if (!(prg_iface & PCIAUTO_IDE_MODE_MASK)) { - DEBUGF("PCI Autoconfig: Skipping legacy mode IDE controller\n"); - return sub_bus; - } - - pciauto_setup_device(hose, dev, 6, hose->pci_mem, hose->pci_prefetch, hose->pci_io); - break; - - case PCI_CLASS_BRIDGE_CARDBUS: - /* just do a minimal setup of the bridge, let the OS take care of the rest */ - pciauto_setup_device(hose, dev, 0, hose->pci_mem, hose->pci_prefetch, hose->pci_io); - - DEBUGF("PCI Autoconfig: Found P2CardBus bridge, device %d\n", PCI_DEV(dev)); - - hose->current_busno++; - break; - -#ifdef CONFIG_MPC5200 - case PCI_CLASS_BRIDGE_OTHER: - DEBUGF("PCI Autoconfig: Skipping bridge device %d\n", - PCI_DEV(dev)); - break; -#endif -#ifdef CONFIG_MPC834X - case PCI_CLASS_BRIDGE_OTHER: - /* - * The host/PCI bridge 1 seems broken in 8349 - it presents - * itself as 'PCI_CLASS_BRIDGE_OTHER' and appears as an _agent_ - * device claiming resources io/mem/irq.. we only allow for - * the PIMMR window to be allocated (BAR0 - 1MB size) - */ - DEBUGF("PCI Autoconfig: Broken bridge found, only minimal config\n"); - pciauto_setup_device(hose, dev, 0, hose->pci_mem, hose->pci_prefetch, hose->pci_io); - break; -#endif - default: - pciauto_setup_device(hose, dev, 6, hose->pci_mem, hose->pci_prefetch, hose->pci_io); - break; - } - - return sub_bus; -} - -#endif /* CONFIG_PCI */ |