123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137138139140141142143144145146147148149150151152153154155156157158159 |
- // SPDX-License-Identifier: GPL-2.0
- /*
- * (C) Copyright 2019
- * Heiko Schocher, DENX Software Engineering, hs@denx.de.
- *
- */
- #include <common.h>
- #include <asm/bitops.h>
- #include <asm/cpm_85xx.h>
- #include <pci.h>
- #include <dm.h>
- #include <asm/fsl_law.h>
- struct mpc85xx_pci_priv {
- void __iomem *cfg_addr;
- void __iomem *cfg_data;
- };
- static int mpc85xx_pci_dm_read_config(const struct udevice *dev, pci_dev_t bdf,
- uint offset, ulong *value,
- enum pci_size_t size)
- {
- struct mpc85xx_pci_priv *priv = dev_get_priv(dev);
- u32 addr;
- addr = bdf | (offset & 0xfc) | ((offset & 0xf00) << 16) | 0x80000000;
- out_be32(priv->cfg_addr, addr);
- sync();
- *value = pci_conv_32_to_size(in_le32(priv->cfg_data), offset, size);
- return 0;
- }
- static int mpc85xx_pci_dm_write_config(struct udevice *dev, pci_dev_t bdf,
- uint offset, ulong value,
- enum pci_size_t size)
- {
- struct mpc85xx_pci_priv *priv = dev_get_priv(dev);
- u32 addr;
- addr = bdf | (offset & 0xfc) | ((offset & 0xf00) << 16) | 0x80000000;
- out_be32(priv->cfg_addr, addr);
- sync();
- out_le32(priv->cfg_data, pci_conv_size_to_32(0, value, offset, size));
- return 0;
- }
- static int
- mpc85xx_pci_dm_setup_laws(struct pci_region *io, struct pci_region *mem,
- struct pci_region *pre)
- {
- /*
- * Unfortunately we have defines for this addresse,
- * as we have to setup the TLB, and at this stage
- * we have no access to DT ... may we check here
- * if the value in the define is the same ?
- */
- if (mem)
- set_next_law(mem->phys_start, law_size_bits(mem->size),
- LAW_TRGT_IF_PCI);
- if (io)
- set_next_law(io->phys_start, law_size_bits(io->size),
- LAW_TRGT_IF_PCI);
- if (pre)
- set_next_law(pre->phys_start, law_size_bits(pre->size),
- LAW_TRGT_IF_PCI);
- return 0;
- }
- static int mpc85xx_pci_dm_probe(struct udevice *dev)
- {
- struct mpc85xx_pci_priv *priv = dev_get_priv(dev);
- struct pci_region *io;
- struct pci_region *mem;
- struct pci_region *pre;
- int count;
- ccsr_pcix_t *pcix;
- count = pci_get_regions(dev, &io, &mem, &pre);
- if (count != 2) {
- printf("%s: wrong count of regions %d only 2 allowed\n",
- __func__, count);
- return -EINVAL;
- }
- mpc85xx_pci_dm_setup_laws(io, mem, pre);
- pcix = priv->cfg_addr;
- /* BAR 1: memory */
- out_be32(&pcix->potar1, (mem->bus_start >> 12) & 0x000fffff);
- out_be32(&pcix->potear1, 0);
- out_be32(&pcix->powbar1, (mem->phys_start >> 12) & 0x000fffff);
- out_be32(&pcix->powbear1, 0);
- out_be32(&pcix->powar1, (POWAR_EN | POWAR_MEM_READ |
- POWAR_MEM_WRITE | (__ilog2(mem->size) - 1)));
- /* BAR 1: IO */
- out_be32(&pcix->potar2, (io->bus_start >> 12) & 0x000fffff);
- out_be32(&pcix->potear2, 0);
- out_be32(&pcix->powbar2, (io->phys_start >> 12) & 0x000fffff);
- out_be32(&pcix->powbear2, 0);
- out_be32(&pcix->powar2, (POWAR_EN | POWAR_IO_READ |
- POWAR_IO_WRITE | (__ilog2(io->size) - 1)));
- out_be32(&pcix->pitar1, 0);
- out_be32(&pcix->piwbar1, 0);
- out_be32(&pcix->piwar1, (PIWAR_EN | PIWAR_PF | PIWAR_LOCAL |
- PIWAR_READ_SNOOP | PIWAR_WRITE_SNOOP | PIWAR_MEM_2G));
- out_be32(&pcix->powar3, 0);
- out_be32(&pcix->powar4, 0);
- out_be32(&pcix->piwar2, 0);
- out_be32(&pcix->piwar3, 0);
- return 0;
- }
- static int mpc85xx_pci_dm_remove(struct udevice *dev)
- {
- return 0;
- }
- static int mpc85xx_pci_ofdata_to_platdata(struct udevice *dev)
- {
- struct mpc85xx_pci_priv *priv = dev_get_priv(dev);
- fdt_addr_t addr;
- addr = devfdt_get_addr_index(dev, 0);
- if (addr == FDT_ADDR_T_NONE)
- return -EINVAL;
- priv->cfg_addr = (void __iomem *)addr;
- addr += 4;
- priv->cfg_data = (void __iomem *)addr;
- return 0;
- }
- static const struct dm_pci_ops mpc85xx_pci_ops = {
- .read_config = mpc85xx_pci_dm_read_config,
- .write_config = mpc85xx_pci_dm_write_config,
- };
- static const struct udevice_id mpc85xx_pci_ids[] = {
- { .compatible = "fsl,mpc8540-pci" },
- { }
- };
- U_BOOT_DRIVER(mpc85xx_pci) = {
- .name = "mpc85xx_pci",
- .id = UCLASS_PCI,
- .of_match = mpc85xx_pci_ids,
- .ops = &mpc85xx_pci_ops,
- .probe = mpc85xx_pci_dm_probe,
- .remove = mpc85xx_pci_dm_remove,
- .ofdata_to_platdata = mpc85xx_pci_ofdata_to_platdata,
- .priv_auto_alloc_size = sizeof(struct mpc85xx_pci_priv),
- };
|