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Diffstat (limited to 'board/cpc45/plx9030.c')
| -rw-r--r-- | board/cpc45/plx9030.c | 174 |
1 files changed, 174 insertions, 0 deletions
diff --git a/board/cpc45/plx9030.c b/board/cpc45/plx9030.c new file mode 100644 index 0000000..e337bd2 --- /dev/null +++ b/board/cpc45/plx9030.c @@ -0,0 +1,174 @@ +/* Plx9030.c - system configuration module for PLX9030 PCI to Local Bus Bridge */ +/* + * (C) Copyright 2002-2003 + * Josef Wagner, MicroSys GmbH, wagner@microsys.de. + * + * 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 + * + * Date Modification by + * ------- ---------------------------------------------- --- + * 30sep02 converted from VxWorks to LINUX wa +*/ + + +/* +DESCRIPTION + +This is the configuration module for the PLX9030 PCI to Local Bus Bridge. +It configures the Chip select lines for SRAM (CS0), ST16C552 (CS1,CS2), Display and local +registers (CS3) on CPC45. +*/ + +/* includes */ + +#include <common.h> +#include <malloc.h> +#include <net.h> +#include <asm/io.h> +#include <pci.h> + +/* imports */ + + +/* defines */ +#define PLX9030_VENDOR_ID 0x10B5 +#define PLX9030_DEVICE_ID 0x9030 + +#undef PLX_DEBUG + +/* PLX9030 register offsets */ +#define P9030_LAS0RR 0x00 +#define P9030_LAS1RR 0x04 +#define P9030_LAS2RR 0x08 +#define P9030_LAS3RR 0x0c +#define P9030_EROMRR 0x10 +#define P9030_LAS0BA 0x14 +#define P9030_LAS1BA 0x18 +#define P9030_LAS2BA 0x1c +#define P9030_LAS3BA 0x20 +#define P9030_EROMBA 0x24 +#define P9030_LAS0BRD 0x28 +#define P9030_LAS1BRD 0x2c +#define P9030_LAS2BRD 0x30 +#define P9030_LAS3BRD 0x34 +#define P9030_EROMBRD 0x38 +#define P9030_CS0BASE 0x3C +#define P9030_CS1BASE 0x40 +#define P9030_CS2BASE 0x44 +#define P9030_CS3BASE 0x48 +#define P9030_INTCSR 0x4c +#define P9030_CNTRL 0x50 +#define P9030_GPIOC 0x54 + +/* typedefs */ + + +/* locals */ + +static struct pci_device_id supported[] = { + { PLX9030_VENDOR_ID, PLX9030_DEVICE_ID }, + { } +}; + +/* forward declarations */ +void sysOutLong(ulong address, ulong value); + + +/*************************************************************************** +* +* Plx9030Init - init CS0..CS3 for CPC45 +* +* +* RETURNS: N/A +*/ + +void Plx9030Init (void) +{ + pci_dev_t devno; + ulong membaseCsr; /* base address of device memory space */ + int idx = 0; /* general index */ + + + /* find plx9030 device */ + + if ((devno = pci_find_devices(supported, idx++)) < 0) + { + printf("No PLX9030 device found !!\n"); + return; + } + + +#ifdef PLX_DEBUG + printf("PLX 9030 device found ! devno = 0x%x\n",devno); +#endif + + membaseCsr = PCI_PLX9030_MEMADDR; + + /* set base address */ + pci_write_config_dword(devno, PCI_BASE_ADDRESS_0, membaseCsr); + + /* enable mapped memory and IO addresses */ + pci_write_config_dword(devno, + PCI_COMMAND, + PCI_COMMAND_MEMORY | + PCI_COMMAND_MASTER); + + + /* configure GBIOC */ + sysOutLong((membaseCsr + P9030_GPIOC), 0x00000FC0); /* CS2/CS3 enable */ + + /* configure CS0 (SRAM) */ + sysOutLong((membaseCsr + P9030_LAS0BA), 0x00000001); /* enable space base */ + sysOutLong((membaseCsr + P9030_LAS0RR), 0x0FE00000); /* 2 MByte */ + sysOutLong((membaseCsr + P9030_LAS0BRD), 0x51928900); /* 4 wait states */ + sysOutLong((membaseCsr + P9030_CS0BASE), 0x00100001); /* enable 2 MByte */ + /* remap CS0 (SRAM) */ + pci_write_config_dword(devno, PCI_BASE_ADDRESS_2, SRAM_BASE); + + /* configure CS1 (ST16552 / CHAN A) */ + sysOutLong((membaseCsr + P9030_LAS1BA), 0x00400001); /* enable space base */ + sysOutLong((membaseCsr + P9030_LAS1RR), 0x0FFFFF00); /* 256 byte */ + sysOutLong((membaseCsr + P9030_LAS1BRD), 0x55122900); /* 4 wait states */ + sysOutLong((membaseCsr + P9030_CS1BASE), 0x00400081); /* enable 256 Byte */ + /* remap CS1 (ST16552 / CHAN A) */ + /* remap CS1 (ST16552 / CHAN A) */ + pci_write_config_dword(devno, PCI_BASE_ADDRESS_3, ST16552_A_BASE); + + /* configure CS2 (ST16552 / CHAN B) */ + sysOutLong((membaseCsr + P9030_LAS2BA), 0x00800001); /* enable space base */ + sysOutLong((membaseCsr + P9030_LAS2RR), 0x0FFFFF00); /* 256 byte */ + sysOutLong((membaseCsr + P9030_LAS2BRD), 0x55122900); /* 4 wait states */ + sysOutLong((membaseCsr + P9030_CS2BASE), 0x00800081); /* enable 256 Byte */ + /* remap CS2 (ST16552 / CHAN B) */ + pci_write_config_dword(devno, PCI_BASE_ADDRESS_4, ST16552_B_BASE); + + /* configure CS3 (BCSR) */ + sysOutLong((membaseCsr + P9030_LAS3BA), 0x00C00001); /* enable space base */ + sysOutLong((membaseCsr + P9030_LAS3RR), 0x0FFFFF00); /* 256 byte */ + sysOutLong((membaseCsr + P9030_LAS3BRD), 0x55357A80); /* 9 wait states */ + sysOutLong((membaseCsr + P9030_CS3BASE), 0x00C00081); /* enable 256 Byte */ + /* remap CS3 (DISPLAY and BCSR) */ + pci_write_config_dword(devno, PCI_BASE_ADDRESS_5, BCSR_BASE); +} + +void sysOutLong(ulong address, ulong value) +{ + *(ulong*)address = cpu_to_le32(value); +} + |