/* * SH7751 PCI Controller (PCIC) for U-Boot. * (C) Dustin McIntire (dustin@sensoria.com) * (C) 2007,2008 Nobuhiro Iwamatsu * * SPDX-License-Identifier: GPL-2.0+ */ #include #include #include #include #include /* Register addresses and such */ #define SH7751_BCR1 (vu_long *)0xFF800000 #define SH7751_BCR2 (vu_short *)0xFF800004 #define SH7751_WCR1 (vu_long *)0xFF800008 #define SH7751_WCR2 (vu_long *)0xFF80000C #define SH7751_WCR3 (vu_long *)0xFF800010 #define SH7751_MCR (vu_long *)0xFF800014 #define SH7751_BCR3 (vu_short *)0xFF800050 #define SH7751_PCICONF0 (vu_long *)0xFE200000 #define SH7751_PCICONF1 (vu_long *)0xFE200004 #define SH7751_PCICONF2 (vu_long *)0xFE200008 #define SH7751_PCICONF3 (vu_long *)0xFE20000C #define SH7751_PCICONF4 (vu_long *)0xFE200010 #define SH7751_PCICONF5 (vu_long *)0xFE200014 #define SH7751_PCICONF6 (vu_long *)0xFE200018 #define SH7751_PCICR (vu_long *)0xFE200100 #define SH7751_PCILSR0 (vu_long *)0xFE200104 #define SH7751_PCILSR1 (vu_long *)0xFE200108 #define SH7751_PCILAR0 (vu_long *)0xFE20010C #define SH7751_PCILAR1 (vu_long *)0xFE200110 #define SH7751_PCIMBR (vu_long *)0xFE2001C4 #define SH7751_PCIIOBR (vu_long *)0xFE2001C8 #define SH7751_PCIPINT (vu_long *)0xFE2001CC #define SH7751_PCIPINTM (vu_long *)0xFE2001D0 #define SH7751_PCICLKR (vu_long *)0xFE2001D4 #define SH7751_PCIBCR1 (vu_long *)0xFE2001E0 #define SH7751_PCIBCR2 (vu_long *)0xFE2001E4 #define SH7751_PCIWCR1 (vu_long *)0xFE2001E8 #define SH7751_PCIWCR2 (vu_long *)0xFE2001EC #define SH7751_PCIWCR3 (vu_long *)0xFE2001F0 #define SH7751_PCIMCR (vu_long *)0xFE2001F4 #define SH7751_PCIBCR3 (vu_long *)0xFE2001F8 #define BCR1_BREQEN 0x00080000 #define PCI_SH7751_ID 0x35051054 #define PCI_SH7751R_ID 0x350E1054 #define SH7751_PCICONF1_WCC 0x00000080 #define SH7751_PCICONF1_PER 0x00000040 #define SH7751_PCICONF1_BUM 0x00000004 #define SH7751_PCICONF1_MES 0x00000002 #define SH7751_PCICONF1_CMDS 0x000000C6 #define SH7751_PCI_HOST_BRIDGE 0x6 #define SH7751_PCICR_PREFIX 0xa5000000 #define SH7751_PCICR_PRST 0x00000002 #define SH7751_PCICR_CFIN 0x00000001 #define SH7751_PCIPINT_D3 0x00000002 #define SH7751_PCIPINT_D0 0x00000001 #define SH7751_PCICLKR_PREFIX 0xa5000000 #define SH7751_PCI_MEM_BASE 0xFD000000 #define SH7751_PCI_MEM_SIZE 0x01000000 #define SH7751_PCI_IO_BASE 0xFE240000 #define SH7751_PCI_IO_SIZE 0x00040000 #define SH7751_CS3_BASE_ADDR 0x0C000000 #define SH7751_P2CS3_BASE_ADDR 0xAC000000 #define SH7751_PCIPAR (vu_long *)0xFE2001C0 #define SH7751_PCIPDR (vu_long *)0xFE200220 #define p4_in(addr) (*addr) #define p4_out(data, addr) (*addr) = (data) /* Double word */ int pci_sh4_read_config_dword(struct pci_controller *hose, pci_dev_t dev, int offset, u32 *value) { u32 par_data = 0x80000000 | dev; p4_out(par_data | (offset & 0xfc), SH7751_PCIPAR); *value = p4_in(SH7751_PCIPDR); return 0; } int pci_sh4_write_config_dword(struct pci_controller *hose, pci_dev_t dev, int offset, u32 value) { u32 par_data = 0x80000000 | dev; p4_out(par_data | (offset & 0xfc), SH7751_PCIPAR); p4_out(value, SH7751_PCIPDR); return 0; } int pci_sh7751_init(struct pci_controller *hose) { /* Double-check that we're a 7751 or 7751R chip */ if (p4_in(SH7751_PCICONF0) != PCI_SH7751_ID && p4_in(SH7751_PCICONF0) != PCI_SH7751R_ID) { printf("PCI: Unknown PCI host bridge.\n"); return 1; } printf("PCI: SH7751 PCI host bridge found.\n"); /* Double-check some BSC config settings */ /* (Area 3 non-MPX 32-bit, PCI bus pins) */ if ((p4_in(SH7751_BCR1) & 0x20008) == 0x20000) { printf("SH7751_BCR1 value is wrong(0x%08X)\n", (unsigned int)p4_in(SH7751_BCR1)); return 2; } if ((p4_in(SH7751_BCR2) & 0xC0) != 0xC0) { printf("SH7751_BCR2 value is wrong(0x%08X)\n", (unsigned int)p4_in(SH7751_BCR2)); return 3; } if (p4_in(SH7751_BCR2) & 0x01) { printf("SH7751_BCR2 value is wrong(0x%08X)\n", (unsigned int)p4_in(SH7751_BCR2)); return 4; } /* Force BREQEN in BCR1 to allow PCIC access */ p4_out((p4_in(SH7751_BCR1) | BCR1_BREQEN), SH7751_BCR1); /* Toggle PCI reset pin */ p4_out((SH7751_PCICR_PREFIX | SH7751_PCICR_PRST), SH7751_PCICR); udelay(32); p4_out(SH7751_PCICR_PREFIX, SH7751_PCICR); /* Set cmd bits: WCC, PER, BUM, MES */ /* (Addr/Data stepping, Parity enabled, Bus Master, Memory enabled) */ p4_out(0xfb900047, SH7751_PCICONF1); /* K.Kino */ /* Define this host as the host bridge */ p4_out((SH7751_PCI_HOST_BRIDGE << 24), SH7751_PCICONF2); /* Force PCI clock(s) on */ p4_out(0, SH7751_PCICLKR); p4_out(0x03, SH7751_PCICLKR); /* Clear powerdown IRQs, also mask them (unused) */ p4_out((SH7751_PCIPINT_D0 | SH7751_PCIPINT_D3), SH7751_PCIPINT); p4_out(0, SH7751_PCIPINTM); p4_out(0xab000001, SH7751_PCICONF4); /* Set up target memory mappings (for external DMA access) */ /* Map both P0 and P2 range to Area 3 RAM for ease of use */ p4_out((64 - 1) << 20, SH7751_PCILSR0); p4_out(SH7751_CS3_BASE_ADDR, SH7751_PCILAR0); p4_out(0, SH7751_PCILSR1); p4_out(0, SH7751_PCILAR1); p4_out(SH7751_CS3_BASE_ADDR, SH7751_PCICONF5); p4_out(0xd0000000, SH7751_PCICONF6); /* Map memory window to same address on PCI bus */ p4_out(SH7751_PCI_MEM_BASE, SH7751_PCIMBR); /* Map IO window to same address on PCI bus */ p4_out(SH7751_PCI_IO_BASE, SH7751_PCIIOBR); /* set BREQEN */ p4_out(inl(SH7751_BCR1) | 0x00080000, SH7751_BCR1); /* Copy BSC registers into PCI BSC */ p4_out(inl(SH7751_BCR1), SH7751_PCIBCR1); p4_out(inw(SH7751_BCR2), SH7751_PCIBCR2); p4_out(inw(SH7751_BCR3), SH7751_PCIBCR3); p4_out(inl(SH7751_WCR1), SH7751_PCIWCR1); p4_out(inl(SH7751_WCR2), SH7751_PCIWCR2); p4_out(inl(SH7751_WCR3), SH7751_PCIWCR3); p4_out(inl(SH7751_MCR), SH7751_PCIMCR); /* Finally, set central function init complete */ p4_out((SH7751_PCICR_PREFIX | SH7751_PCICR_CFIN), SH7751_PCICR); pci_sh4_init(hose); return 0; }