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Diffstat (limited to 'cpu/mpc8260/pci.c')
| -rw-r--r-- | cpu/mpc8260/pci.c | 244 |
1 files changed, 244 insertions, 0 deletions
diff --git a/cpu/mpc8260/pci.c b/cpu/mpc8260/pci.c new file mode 100644 index 0000000..f9f1e27 --- /dev/null +++ b/cpu/mpc8260/pci.c @@ -0,0 +1,244 @@ +/* + * (C) Copyright 2003 + * Wolfgang Denk, DENX Software Engineering, wd@denx.de. + * + * See file CREDITS for list of people who contributed to this + * project. + * + * 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. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, + * MA 02111-1307 USA + */ + +#include <common.h> + +#ifdef CONFIG_PCI + +#include <pci.h> +#include <asm/m8260_pci.h> + +/* + * Local->PCI map (from CPU) controlled by + * MPC826x master window + * + * 0x80000000 - 0xBFFFFFFF Total CPU2PCI space PCIBR0 + * + * 0x80000000 - 0x8FFFFFFF PCI Mem with prefetch (Outbound ATU #1) + * 0x90000000 - 0x9FFFFFFF PCI Mem w/o prefetch (Outbound ATU #2) + * 0xA0000000 - 0xAFFFFFFF 32-bit PCI IO (Outbound ATU #3) + * + * PCI->Local map (from PCI) + * MPC826x slave window controlled by + * + * 0x00000000 - 0x07FFFFFF MPC826x local memory (Inbound ATU #1) + */ + +/* + * Slave window that allows PCI masters to access MPC826x local memory. + * This window is set up using the first set of Inbound ATU registers + */ + +#define PCI_SLV_MEM_LOCAL CFG_SDRAM_BASE /* Local base */ +#define PCI_SLV_MEM_BUS 0x00000000 /* PCI base */ +#define PICMR0_MASK_ATTRIB (PICMR_MASK_512MB | PICMR_ENABLE | \ + PICMR_PREFETCH_EN) + +/* + * This is the window that allows the CPU to access PCI address space. + * It will be setup with the SIU PCIBR0 register. All three PCI master + * windows, which allow the CPU to access PCI prefetch, non prefetch, + * and IO space (see below), must all fit within this window. + */ + +#define PCI_MSTR_LOCAL 0x80000000 /* Local base */ +#define PCIMSK0_MASK PCIMSK_1GB /* Size of window */ + +/* + * Master window that allows the CPU to access PCI Memory (prefetch). + * This window will be setup with the first set of Outbound ATU registers + * in the bridge. + */ + +#define PCI_MSTR_MEM_LOCAL 0x80000000 /* Local base */ +#define PCI_MSTR_MEM_BUS 0x80000000 /* PCI base */ +#define CPU_PCI_MEM_START PCI_MSTR_MEM_LOCAL +#define PCI_MSTR_MEM_SIZE 0x10000000 /* 256MB */ +#define POCMR0_MASK_ATTRIB (POCMR_MASK_256MB | POCMR_ENABLE | POCMR_PREFETCH_EN) + +/* + * Master window that allows the CPU to access PCI Memory (non-prefetch). + * This window will be setup with the second set of Outbound ATU registers + * in the bridge. + */ + +#define PCI_MSTR_MEMIO_LOCAL 0x90000000 /* Local base */ +#define PCI_MSTR_MEMIO_BUS 0x90000000 /* PCI base */ +#define CPU_PCI_MEMIO_START PCI_MSTR_MEMIO_LOCAL +#define PCI_MSTR_MEMIO_SIZE 0x10000000 /* 256MB */ +#define POCMR1_MASK_ATTRIB (POCMR_MASK_256MB | POCMR_ENABLE) + +/* + * Master window that allows the CPU to access PCI IO space. + * This window will be setup with the third set of Outbound ATU registers + * in the bridge. + */ + +#define PCI_MSTR_IO_LOCAL 0xA0000000 /* Local base */ +#define PCI_MSTR_IO_BUS 0xA0000000 /* PCI base */ +#define CPU_PCI_IO_START PCI_MSTR_IO_LOCAL +#define PCI_MSTR_IO_SIZE 0x10000000 /* 256MB */ +#define POCMR2_MASK_ATTRIB (POCMR_MASK_256MB | POCMR_ENABLE | POCMR_PCI_IO) + +/* PCI bus configuration registers. + */ + +#define PCI_CLASS_BRIDGE_CTLR 0x06 + + +static inline void pci_outl(u32 addr, u32 data) +{ + *(volatile u32 *) addr = cpu_to_le32(data); +} + +void pci_mpc8250_init(struct pci_controller *hose) +{ + u16 tempShort; + u32 immr_addr = CFG_IMMR; + volatile immap_t *immap = (immap_t *) CFG_IMMR; + pci_dev_t host_devno = PCI_BDF(0, 0, 0); + + pci_setup_indirect(hose, CFG_IMMR + PCI_CFG_ADDR_REG, + CFG_IMMR + PCI_CFG_DATA_REG); + + /* + * Setting required to enable IRQ1-IRQ7 (SIUMCR [DPPC]), + * and local bus for PCI (SIUMCR [LBPC]). + */ + immap->im_siu_conf.sc_siumcr = 0x00640000; + + /* Make PCI lowest priority */ + /* Each 4 bits is a device bus request and the MS 4bits + is highest priority */ + /* Bus 4bit value + --- ---------- + CPM high 0b0000 + CPM middle 0b0001 + CPM low 0b0010 + PCI reguest 0b0011 + Reserved 0b0100 + Reserved 0b0101 + Internal Core 0b0110 + External Master 1 0b0111 + External Master 2 0b1000 + External Master 3 0b1001 + The rest are reserved */ + immap->im_siu_conf.sc_ppc_alrh = 0x61207893; + + /* Park bus on core while modifying PCI Bus accesses */ + immap->im_siu_conf.sc_ppc_acr = 0x6; + + /* + * Set up master window that allows the CPU to access PCI space. This + * window is set up using the first SIU PCIBR registers. + */ + *(volatile unsigned long*)(immr_addr + M8265_PCIMSK0) = PCIMSK0_MASK; + *(volatile unsigned long*)(immr_addr + M8265_PCIBR0) = + PCI_MSTR_LOCAL | PCIBR_ENABLE; + + /* Release PCI RST (by default the PCI RST signal is held low) */ + pci_outl (immr_addr | PCI_GCR_REG, PCIGCR_PCI_BUS_EN); + + /* give it some time */ + udelay(1000); + + /* + * Set up master window that allows the CPU to access PCI Memory (prefetch) + * space. This window is set up using the first set of Outbound ATU registers. + */ + pci_outl (immr_addr | POTAR_REG0, PCI_MSTR_MEM_BUS >> 12); /* PCI base */ + pci_outl (immr_addr | POBAR_REG0, PCI_MSTR_MEM_LOCAL >> 12); /* Local base */ + pci_outl (immr_addr | POCMR_REG0, POCMR0_MASK_ATTRIB); /* Size & attribute */ + + /* + * Set up master window that allows the CPU to access PCI Memory (non-prefetch) + * space. This window is set up using the second set of Outbound ATU registers. + */ + pci_outl (immr_addr | POTAR_REG1, PCI_MSTR_MEMIO_BUS >> 12); /* PCI base */ + pci_outl (immr_addr | POBAR_REG1, PCI_MSTR_MEMIO_LOCAL >> 12); /* Local base */ + pci_outl (immr_addr | POCMR_REG1, POCMR1_MASK_ATTRIB); /* Size & attribute */ + + /* + * Set up master window that allows the CPU to access PCI IO space. This window + * is set up using the third set of Outbound ATU registers. + */ + pci_outl (immr_addr | POTAR_REG2, PCI_MSTR_IO_BUS >> 12); /* PCI base */ + pci_outl (immr_addr | POBAR_REG2, PCI_MSTR_IO_LOCAL >> 12); /* Local base */ + pci_outl (immr_addr | POCMR_REG2, POCMR2_MASK_ATTRIB); /* Size & attribute */ + + /* + * Set up slave window that allows PCI masters to access MPC826x local memory. + * This window is set up using the first set of Inbound ATU registers + */ + pci_outl (immr_addr | PITAR_REG0, PCI_SLV_MEM_LOCAL >> 12); /* Local base */ + pci_outl (immr_addr | PIBAR_REG0, PCI_SLV_MEM_BUS >> 12); /* PCI base */ + pci_outl (immr_addr | PICMR_REG0, PICMR0_MASK_ATTRIB); /* Size & attribute */ + + /* See above for description - puts PCI request as highest priority */ + immap->im_siu_conf.sc_ppc_alrh = 0x03124567; + + /* Park the bus on the PCI */ + immap->im_siu_conf.sc_ppc_acr = PPC_ACR_BUS_PARK_PCI; + + /* Host mode - specify the bridge as a host-PCI bridge */ + + pci_hose_write_config_byte(hose, host_devno, PCI_CLASS_CODE, + PCI_CLASS_BRIDGE_CTLR); + + /* Enable the host bridge to be a master on the PCI bus, and to act as a PCI memory target */ + pci_hose_read_config_word(hose, host_devno, PCI_COMMAND, &tempShort); + pci_hose_write_config_word(hose, host_devno, PCI_COMMAND, + tempShort | PCI_COMMAND_MASTER | PCI_COMMAND_MEMORY); + + hose->first_busno = 0; + hose->last_busno = 0xff; + + /* System memory space */ + pci_set_region(hose->regions + 0, + CFG_SDRAM_BASE, + CFG_SDRAM_BASE, + 0x4000000, + PCI_REGION_MEM | PCI_REGION_MEMORY); + + /* PCI memory space */ + pci_set_region(hose->regions + 1, + PCI_MSTR_MEM_BUS, + PCI_MSTR_MEM_LOCAL, + PCI_MSTR_MEM_SIZE, + PCI_REGION_MEM); + + /* PCI I/O space */ + pci_set_region(hose->regions + 2, + PCI_MSTR_IO_BUS, + PCI_MSTR_IO_LOCAL, + PCI_MSTR_IO_SIZE, + PCI_REGION_IO); + + hose->region_count = 3; + + pci_register_hose(hose); + + hose->last_busno = pci_hose_scan(hose); +} + +#endif /* CONFIG_PCI */ |