126 lines
3.3 KiB
C
126 lines
3.3 KiB
C
/*
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* Copyright (C) 2013 Imagination Technologies
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* Author: Paul Burton <paul.burton@imgtec.com>
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*
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* SPDX-License-Identifier: GPL-2.0+
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*/
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#include <common.h>
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#include <msc01.h>
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#include <pci.h>
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#include <pci_msc01.h>
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#include <asm/io.h>
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#define PCI_ACCESS_READ 0
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#define PCI_ACCESS_WRITE 1
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struct msc01_pci_controller {
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struct pci_controller hose;
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void *base;
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};
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static inline struct msc01_pci_controller *
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hose_to_msc01(struct pci_controller *hose)
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{
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return container_of(hose, struct msc01_pci_controller, hose);
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}
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static int msc01_config_access(struct msc01_pci_controller *msc01,
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unsigned char access_type, pci_dev_t bdf,
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int where, u32 *data)
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{
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const u32 aborts = MSC01_PCI_INTSTAT_MA_MSK | MSC01_PCI_INTSTAT_TA_MSK;
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void *intstat = msc01->base + MSC01_PCI_INTSTAT_OFS;
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void *cfgdata = msc01->base + MSC01_PCI_CFGDATA_OFS;
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unsigned int bus = PCI_BUS(bdf);
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unsigned int dev = PCI_DEV(bdf);
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unsigned int devfn = PCI_DEV(bdf) << 3 | PCI_FUNC(bdf);
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/* clear abort status */
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__raw_writel(aborts, intstat);
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/* setup address */
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__raw_writel((bus << MSC01_PCI_CFGADDR_BNUM_SHF) |
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(dev << MSC01_PCI_CFGADDR_DNUM_SHF) |
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(devfn << MSC01_PCI_CFGADDR_FNUM_SHF) |
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((where / 4) << MSC01_PCI_CFGADDR_RNUM_SHF),
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msc01->base + MSC01_PCI_CFGADDR_OFS);
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/* perform access */
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if (access_type == PCI_ACCESS_WRITE)
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__raw_writel(*data, cfgdata);
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else
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*data = __raw_readl(cfgdata);
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/* check for aborts */
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if (__raw_readl(intstat) & aborts) {
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/* clear abort status */
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__raw_writel(aborts, intstat);
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return -1;
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}
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return 0;
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}
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static int msc01_read_config_dword(struct pci_controller *hose, pci_dev_t dev,
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int where, u32 *value)
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{
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struct msc01_pci_controller *msc01 = hose_to_msc01(hose);
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*value = 0xffffffff;
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return msc01_config_access(msc01, PCI_ACCESS_READ, dev, where, value);
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}
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static int msc01_write_config_dword(struct pci_controller *hose, pci_dev_t dev,
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int where, u32 value)
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{
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struct msc01_pci_controller *gt = hose_to_msc01(hose);
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u32 data = value;
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return msc01_config_access(gt, PCI_ACCESS_WRITE, dev, where, &data);
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}
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void msc01_pci_init(void *base, unsigned long sys_bus, unsigned long sys_phys,
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unsigned long sys_size, unsigned long mem_bus,
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unsigned long mem_phys, unsigned long mem_size,
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unsigned long io_bus, unsigned long io_phys,
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unsigned long io_size)
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{
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static struct msc01_pci_controller global_msc01;
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struct msc01_pci_controller *msc01;
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struct pci_controller *hose;
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msc01 = &global_msc01;
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msc01->base = base;
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hose = &msc01->hose;
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hose->first_busno = 0;
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hose->last_busno = 0;
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/* System memory space */
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pci_set_region(&hose->regions[0], sys_bus, sys_phys, sys_size,
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PCI_REGION_MEM | PCI_REGION_SYS_MEMORY);
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/* PCI memory space */
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pci_set_region(&hose->regions[1], mem_bus, mem_phys, mem_size,
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PCI_REGION_MEM);
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/* PCI I/O space */
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pci_set_region(&hose->regions[2], io_bus, io_phys, io_size,
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PCI_REGION_IO);
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hose->region_count = 3;
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pci_set_ops(hose,
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pci_hose_read_config_byte_via_dword,
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pci_hose_read_config_word_via_dword,
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msc01_read_config_dword,
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pci_hose_write_config_byte_via_dword,
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pci_hose_write_config_word_via_dword,
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msc01_write_config_dword);
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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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