mirror of
https://github.com/AsahiLinux/u-boot
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154 lines
4.6 KiB
C
154 lines
4.6 KiB
C
/*
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* Copyright (C) 2004-2007, 2012 Freescale Semiconductor, Inc.
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* TsiChung Liew (Tsi-Chung.Liew@freescale.com)
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*
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* SPDX-License-Identifier: GPL-2.0+
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*/
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/*
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* PCI Configuration space access support
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*/
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#include <common.h>
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#include <pci.h>
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#include <asm/io.h>
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#include <asm/immap.h>
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#if defined(CONFIG_PCI)
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/* System RAM mapped over PCI */
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#define CONFIG_SYS_PCI_SYS_MEM_BUS CONFIG_SYS_SDRAM_BASE
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#define CONFIG_SYS_PCI_SYS_MEM_PHYS CONFIG_SYS_SDRAM_BASE
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#define CONFIG_SYS_PCI_SYS_MEM_SIZE (1024 * 1024 * 1024)
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#define cfg_read(val, addr, type, op) *val = op((type)(addr));
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#define cfg_write(val, addr, type, op) op((type *)(addr), (val));
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#define PCI_OP(rw, size, type, op, mask) \
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int pci_##rw##_cfg_##size(struct pci_controller *hose, \
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pci_dev_t dev, int offset, type val) \
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{ \
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u32 addr = 0; \
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u16 cfg_type = 0; \
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addr = ((offset & 0xfc) | cfg_type | (dev) | 0x80000000); \
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out_be32(hose->cfg_addr, addr); \
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cfg_##rw(val, hose->cfg_data + (offset & mask), type, op); \
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__asm__ __volatile__("nop"); \
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__asm__ __volatile__("nop"); \
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out_be32(hose->cfg_addr, addr & 0x7fffffff); \
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return 0; \
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}
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PCI_OP(read, byte, u8 *, in_8, 3)
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PCI_OP(read, word, u16 *, in_le16, 2)
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PCI_OP(write, byte, u8, out_8, 3)
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PCI_OP(write, word, u16, out_le16, 2)
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PCI_OP(write, dword, u32, out_le32, 0)
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int pci_read_cfg_dword(struct pci_controller *hose, pci_dev_t dev,
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int offset, u32 * val)
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{
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u32 addr;
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u32 tmpv;
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u32 mask = 2; /* word access */
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/* Read lower 16 bits */
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addr = ((offset & 0xfc) | (dev) | 0x80000000);
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out_be32(hose->cfg_addr, addr);
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*val = (u32) in_le16((u16 *) (hose->cfg_data + (offset & mask)));
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__asm__ __volatile__("nop");
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out_be32(hose->cfg_addr, addr & 0x7fffffff);
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/* Read upper 16 bits */
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offset += 2;
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addr = ((offset & 0xfc) | 1 | (dev) | 0x80000000);
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out_be32(hose->cfg_addr, addr);
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tmpv = (u32) in_le16((u16 *) (hose->cfg_data + (offset & mask)));
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__asm__ __volatile__("nop");
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out_be32(hose->cfg_addr, addr & 0x7fffffff);
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/* combine results into dword value */
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*val = (tmpv << 16) | *val;
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return 0;
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}
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void pci_mcf547x_8x_init(struct pci_controller *hose)
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{
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pci_t *pci = (pci_t *) MMAP_PCI;
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gpio_t *gpio = (gpio_t *) MMAP_GPIO;
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/* Port configuration */
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out_be16(&gpio->par_pcibg,
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GPIO_PAR_PCIBG_PCIBG0(3) | GPIO_PAR_PCIBG_PCIBG1(3) |
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GPIO_PAR_PCIBG_PCIBG2(3) | GPIO_PAR_PCIBG_PCIBG3(3) |
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GPIO_PAR_PCIBG_PCIBG4(3));
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out_be16(&gpio->par_pcibr,
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GPIO_PAR_PCIBR_PCIBR0(3) | GPIO_PAR_PCIBR_PCIBR1(3) |
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GPIO_PAR_PCIBR_PCIBR2(3) | GPIO_PAR_PCIBR_PCIBR3(3) |
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GPIO_PAR_PCIBR_PCIBR4(3));
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/* Assert reset bit */
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setbits_be32(&pci->gscr, PCI_GSCR_PR);
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out_be32(&pci->tcr1, PCI_TCR1_P);
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/* Initiator windows */
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out_be32(&pci->iw0btar,
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CONFIG_SYS_PCI_MEM_PHYS | (CONFIG_SYS_PCI_MEM_PHYS >> 16));
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out_be32(&pci->iw1btar,
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CONFIG_SYS_PCI_IO_PHYS | (CONFIG_SYS_PCI_IO_PHYS >> 16));
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out_be32(&pci->iw2btar,
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CONFIG_SYS_PCI_CFG_PHYS | (CONFIG_SYS_PCI_CFG_PHYS >> 16));
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out_be32(&pci->iwcr,
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PCI_IWCR_W0C_EN | PCI_IWCR_W1C_EN | PCI_IWCR_W1C_IO |
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PCI_IWCR_W2C_EN | PCI_IWCR_W2C_IO);
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out_be32(&pci->icr, 0);
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/* Enable bus master and mem access */
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out_be32(&pci->scr, PCI_SCR_B | PCI_SCR_M);
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/* Cache line size and master latency */
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out_be32(&pci->cr1, PCI_CR1_CLS(8) | PCI_CR1_LTMR(0xf8));
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out_be32(&pci->cr2, 0);
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#ifdef CONFIG_SYS_PCI_BAR0
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out_be32(&pci->bar0, PCI_BAR_BAR0(CONFIG_SYS_PCI_BAR0));
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out_be32(&pci->tbatr0a, CONFIG_SYS_PCI_TBATR0 | PCI_TBATR_EN);
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#endif
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#ifdef CONFIG_SYS_PCI_BAR1
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out_be32(&pci->bar1, PCI_BAR_BAR1(CONFIG_SYS_PCI_BAR1));
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out_be32(&pci->tbatr1a, CONFIG_SYS_PCI_TBATR1 | PCI_TBATR_EN);
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#endif
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/* Deassert reset bit */
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clrbits_be32(&pci->gscr, PCI_GSCR_PR);
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udelay(1000);
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/* Enable PCI bus master support */
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hose->first_busno = 0;
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hose->last_busno = 0xff;
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pci_set_region(hose->regions + 0, CONFIG_SYS_PCI_MEM_BUS, CONFIG_SYS_PCI_MEM_PHYS,
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CONFIG_SYS_PCI_MEM_SIZE, PCI_REGION_MEM);
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pci_set_region(hose->regions + 1, CONFIG_SYS_PCI_IO_BUS, CONFIG_SYS_PCI_IO_PHYS,
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CONFIG_SYS_PCI_IO_SIZE, PCI_REGION_IO);
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pci_set_region(hose->regions + 2, CONFIG_SYS_PCI_SYS_MEM_BUS,
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CONFIG_SYS_PCI_SYS_MEM_PHYS, CONFIG_SYS_PCI_SYS_MEM_SIZE,
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PCI_REGION_MEM | PCI_REGION_SYS_MEMORY);
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hose->region_count = 3;
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hose->cfg_addr = &(pci->car);
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hose->cfg_data = (volatile unsigned char *)CONFIG_SYS_PCI_CFG_BUS;
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pci_set_ops(hose, pci_read_cfg_byte, pci_read_cfg_word,
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pci_read_cfg_dword, pci_write_cfg_byte, pci_write_cfg_word,
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pci_write_cfg_dword);
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/* Hose scan */
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pci_register_hose(hose);
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hose->last_busno = pci_hose_scan(hose);
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}
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#endif /* CONFIG_PCI */
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