diff options
Diffstat (limited to 'cpu/mcf5445x/pci.c')
| -rw-r--r-- | cpu/mcf5445x/pci.c | 189 |
1 files changed, 189 insertions, 0 deletions
diff --git a/cpu/mcf5445x/pci.c b/cpu/mcf5445x/pci.c new file mode 100644 index 0000000..8ace536 --- /dev/null +++ b/cpu/mcf5445x/pci.c @@ -0,0 +1,189 @@ +/* + * Copyright (C) 2004-2007 Freescale Semiconductor, Inc. + * TsiChung Liew (Tsi-Chung.Liew@freescale.com) + * + * 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 + */ + +/* + * PCI Configuration space access support + */ +#include <common.h> +#include <pci.h> +#include <asm/io.h> +#include <asm/immap.h> + +#if defined(CONFIG_PCI) +/* System RAM mapped over PCI */ +#define CFG_PCI_SYS_MEM_BUS CFG_SDRAM_BASE +#define CFG_PCI_SYS_MEM_PHYS CFG_SDRAM_BASE +#define CFG_PCI_SYS_MEM_SIZE (1024 * 1024 * 1024) + +#define cfg_read(val, addr, type, op) *val = op((type)(addr)); +#define cfg_write(val, addr, type, op) op((type *)(addr), (val)); + +#define PCI_OP(rw, size, type, op, mask) \ +int pci_##rw##_cfg_##size(struct pci_controller *hose, \ + pci_dev_t dev, int offset, type val) \ +{ \ + u32 addr = 0; \ + u16 cfg_type = 0; \ + addr = ((offset & 0xfc) | cfg_type | (dev) | 0x80000000); \ + out_be32(hose->cfg_addr, addr); \ + __asm__ __volatile__("nop"); \ + cfg_##rw(val, hose->cfg_data + (offset & mask), type, op); \ + out_be32(hose->cfg_addr, addr & 0x7fffffff); \ + __asm__ __volatile__("nop"); \ + return 0; \ +} + +PCI_OP(read, byte, u8 *, in_8, 3) +PCI_OP(read, word, u16 *, in_le16, 2) +PCI_OP(write, byte, u8, out_8, 3) +PCI_OP(write, word, u16, out_le16, 2) +PCI_OP(write, dword, u32, out_le32, 0) + +int pci_read_cfg_dword(struct pci_controller *hose, pci_dev_t dev, + int offset, u32 * val) +{ + u32 addr; + u32 tmpv; + u32 mask = 2; /* word access */ + /* Read lower 16 bits */ + addr = ((offset & 0xfc) | (dev) | 0x80000000); + out_be32(hose->cfg_addr, addr); + __asm__ __volatile__("nop"); + *val = (u32) in_le16((u16 *) (hose->cfg_data + (offset & mask))); + out_be32(hose->cfg_addr, addr & 0x7fffffff); + __asm__ __volatile__("nop"); + + /* Read upper 16 bits */ + offset += 2; + addr = ((offset & 0xfc) | 1 | (dev) | 0x80000000); + out_be32(hose->cfg_addr, addr); + __asm__ __volatile__("nop"); + tmpv = (u32) in_le16((u16 *) (hose->cfg_data + (offset & mask))); + out_be32(hose->cfg_addr, addr & 0x7fffffff); + __asm__ __volatile__("nop"); + + /* combine results into dword value */ + *val = (tmpv << 16) | *val; + + return 0; +} + +void pci_mcf5445x_init(struct pci_controller *hose) +{ + volatile pci_t *pci = (volatile pci_t *)MMAP_PCI; + volatile pciarb_t *pciarb = (volatile pciarb_t *)MMAP_PCIARB; + volatile gpio_t *gpio = (gpio_t *) MMAP_GPIO; + u32 barEn = 0; + + pciarb->acr = 0x001f001f; + + /* Set PCIGNT1, PCIREQ1, PCIREQ0/PCIGNTIN, PCIGNT0/PCIREQOUT, + PCIREQ2, PCIGNT2 */ + gpio->par_pci = + GPIO_PAR_PCI_GNT3_GNT3 | GPIO_PAR_PCI_GNT2 | GPIO_PAR_PCI_GNT1 | + GPIO_PAR_PCI_GNT0 | GPIO_PAR_PCI_REQ3_REQ3 | GPIO_PAR_PCI_REQ2 | + GPIO_PAR_PCI_REQ1 | GPIO_PAR_PCI_REQ0; + + pci->tcr1 |= PCI_TCR1_P; + + /* Initiator windows */ + pci->iw0btar = CFG_PCI_MEM_PHYS; + pci->iw1btar = CFG_PCI_IO_PHYS; + pci->iw2btar = CFG_PCI_CFG_PHYS; + + pci->iwcr = + PCI_IWCR_W0C_EN | PCI_IWCR_W1C_EN | PCI_IWCR_W1C_IO | + PCI_IWCR_W2C_EN | PCI_IWCR_W2C_IO; + + /* Enable bus master and mem access */ + pci->scr = PCI_SCR_MW | PCI_SCR_B | PCI_SCR_M; + + /* Cache line size and master latency */ + pci->cr1 = PCI_CR1_CLS(8) | PCI_CR1_LTMR(0xFF); + pci->cr2 = 0; + +#ifdef CFG_PCI_BAR0 + pci->bar0 = PCI_BAR_BAR0(CFG_PCI_BAR0); + pci->tbatr0 = CFG_PCI_TBATR0 | PCI_TBATR_EN; + barEn |= PCI_TCR1_B0E; +#endif +#ifdef CFG_PCI_BAR1 + pci->bar1 = PCI_BAR_BAR1(CFG_PCI_BAR1); + pci->tbatr1 = CFG_PCI_TBATR1 | PCI_TBATR_EN; + barEn |= PCI_TCR1_B1E; +#endif +#ifdef CFG_PCI_BAR2 + pci->bar2 = PCI_BAR_BAR2(CFG_PCI_BAR2); + pci->tbatr2 = CFG_PCI_TBATR2 | PCI_TBATR_EN; + barEn |= PCI_TCR1_B2E; +#endif +#ifdef CFG_PCI_BAR3 + pci->bar3 = PCI_BAR_BAR3(CFG_PCI_BAR3); + pci->tbatr3 = CFG_PCI_TBATR3 | PCI_TBATR_EN; + barEn |= PCI_TCR1_B3E; +#endif +#ifdef CFG_PCI_BAR4 + pci->bar4 = PCI_BAR_BAR4(CFG_PCI_BAR4); + pci->tbatr4 = CFG_PCI_TBATR4 | PCI_TBATR_EN; + barEn |= PCI_TCR1_B4E; +#endif +#ifdef CFG_PCI_BAR5 + pci->bar5 = PCI_BAR_BAR5(CFG_PCI_BAR5); + pci->tbatr5 = CFG_PCI_TBATR5 | PCI_TBATR_EN; + barEn |= PCI_TCR1_B5E; +#endif + + pci->tcr2 = barEn; + + /* Deassert reset bit */ + pci->gscr &= ~PCI_GSCR_PR; + udelay(1000); + + /* Enable PCI bus master support */ + hose->first_busno = 0; + hose->last_busno = 0xff; + + pci_set_region(hose->regions + 0, CFG_PCI_MEM_BUS, CFG_PCI_MEM_PHYS, + CFG_PCI_MEM_SIZE, PCI_REGION_MEM); + + pci_set_region(hose->regions + 1, CFG_PCI_IO_BUS, CFG_PCI_IO_PHYS, + CFG_PCI_IO_SIZE, PCI_REGION_IO); + + pci_set_region(hose->regions + 2, CFG_PCI_SYS_MEM_BUS, + CFG_PCI_SYS_MEM_PHYS, CFG_PCI_SYS_MEM_SIZE, + PCI_REGION_MEM | PCI_REGION_MEMORY); + + hose->region_count = 3; + + hose->cfg_addr = &(pci->car); + hose->cfg_data = (volatile unsigned char *)CFG_PCI_CFG_BUS; + + pci_set_ops(hose, pci_read_cfg_byte, pci_read_cfg_word, + pci_read_cfg_dword, pci_write_cfg_byte, pci_write_cfg_word, + pci_write_cfg_dword); + + /* Hose scan */ + pci_register_hose(hose); + hose->last_busno = pci_hose_scan(hose); +} +#endif /* CONFIG_PCI */ |