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Diffstat (limited to 'arch/ppc/cpu/mpc85xx/pci.c')
-rw-r--r--arch/ppc/cpu/mpc85xx/pci.c230
1 files changed, 230 insertions, 0 deletions
diff --git a/arch/ppc/cpu/mpc85xx/pci.c b/arch/ppc/cpu/mpc85xx/pci.c
new file mode 100644
index 0000000..75d2716
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+++ b/arch/ppc/cpu/mpc85xx/pci.c
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+/*
+ * Copyright 2004 Freescale Semiconductor.
+ * Copyright (C) 2003 Motorola Inc.
+ * Xianghua Xiao (x.xiao@motorola.com)
+ *
+ * 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
+ */
+
+/*
+ * PCI Configuration space access support for MPC85xx PCI Bridge
+ */
+#include <common.h>
+#include <asm/cpm_85xx.h>
+#include <pci.h>
+
+#if !defined(CONFIG_FSL_PCI_INIT)
+
+#ifndef CONFIG_SYS_PCI1_MEM_BUS
+#define CONFIG_SYS_PCI1_MEM_BUS CONFIG_SYS_PCI1_MEM_BASE
+#endif
+
+#ifndef CONFIG_SYS_PCI1_IO_BUS
+#define CONFIG_SYS_PCI1_IO_BUS CONFIG_SYS_PCI1_IO_BASE
+#endif
+
+#ifndef CONFIG_SYS_PCI2_MEM_BUS
+#define CONFIG_SYS_PCI2_MEM_BUS CONFIG_SYS_PCI2_MEM_BASE
+#endif
+
+#ifndef CONFIG_SYS_PCI2_IO_BUS
+#define CONFIG_SYS_PCI2_IO_BUS CONFIG_SYS_PCI2_IO_BASE
+#endif
+
+static struct pci_controller *pci_hose;
+
+void
+pci_mpc85xx_init(struct pci_controller *board_hose)
+{
+ u16 reg16;
+ u32 dev;
+
+ volatile ccsr_pcix_t *pcix = (void *)(CONFIG_SYS_MPC85xx_PCIX_ADDR);
+#ifdef CONFIG_MPC85XX_PCI2
+ volatile ccsr_pcix_t *pcix2 = (void *)(CONFIG_SYS_MPC85xx_PCIX2_ADDR);
+#endif
+ volatile ccsr_gur_t *gur = (void *)(CONFIG_SYS_MPC85xx_GUTS_ADDR);
+ struct pci_controller * hose;
+
+ pci_hose = board_hose;
+
+ hose = &pci_hose[0];
+
+ hose->first_busno = 0;
+ hose->last_busno = 0xff;
+
+ pci_setup_indirect(hose,
+ (CONFIG_SYS_IMMR+0x8000),
+ (CONFIG_SYS_IMMR+0x8004));
+
+ /*
+ * Hose scan.
+ */
+ dev = PCI_BDF(hose->first_busno, 0, 0);
+ pci_hose_read_config_word (hose, dev, PCI_COMMAND, &reg16);
+ reg16 |= PCI_COMMAND_SERR | PCI_COMMAND_MASTER | PCI_COMMAND_MEMORY;
+ pci_hose_write_config_word(hose, dev, PCI_COMMAND, reg16);
+
+ /*
+ * Clear non-reserved bits in status register.
+ */
+ pci_hose_write_config_word(hose, dev, PCI_STATUS, 0xffff);
+
+ if (!(gur->pordevsr & MPC85xx_PORDEVSR_PCI1)) {
+ /* PCI-X init */
+ if (CONFIG_SYS_CLK_FREQ < 66000000)
+ printf("PCI-X will only work at 66 MHz\n");
+
+ reg16 = PCI_X_CMD_MAX_SPLIT | PCI_X_CMD_MAX_READ
+ | PCI_X_CMD_ERO | PCI_X_CMD_DPERR_E;
+ pci_hose_write_config_word(hose, dev, PCIX_COMMAND, reg16);
+ }
+
+ pcix->potar1 = (CONFIG_SYS_PCI1_MEM_BUS >> 12) & 0x000fffff;
+ pcix->potear1 = 0x00000000;
+ pcix->powbar1 = (CONFIG_SYS_PCI1_MEM_PHYS >> 12) & 0x000fffff;
+ pcix->powbear1 = 0x00000000;
+ pcix->powar1 = (POWAR_EN | POWAR_MEM_READ |
+ POWAR_MEM_WRITE | (__ilog2(CONFIG_SYS_PCI1_MEM_SIZE) - 1));
+
+ pcix->potar2 = (CONFIG_SYS_PCI1_IO_BUS >> 12) & 0x000fffff;
+ pcix->potear2 = 0x00000000;
+ pcix->powbar2 = (CONFIG_SYS_PCI1_IO_PHYS >> 12) & 0x000fffff;
+ pcix->powbear2 = 0x00000000;
+ pcix->powar2 = (POWAR_EN | POWAR_IO_READ |
+ POWAR_IO_WRITE | (__ilog2(CONFIG_SYS_PCI1_IO_SIZE) - 1));
+
+ pcix->pitar1 = 0x00000000;
+ pcix->piwbar1 = 0x00000000;
+ pcix->piwar1 = (PIWAR_EN | PIWAR_PF | PIWAR_LOCAL |
+ PIWAR_READ_SNOOP | PIWAR_WRITE_SNOOP | PIWAR_MEM_2G);
+
+ pcix->powar3 = 0;
+ pcix->powar4 = 0;
+ pcix->piwar2 = 0;
+ pcix->piwar3 = 0;
+
+ pci_set_region(hose->regions + 0,
+ CONFIG_SYS_PCI1_MEM_BUS,
+ CONFIG_SYS_PCI1_MEM_PHYS,
+ CONFIG_SYS_PCI1_MEM_SIZE,
+ PCI_REGION_MEM);
+
+ pci_set_region(hose->regions + 1,
+ CONFIG_SYS_PCI1_IO_BUS,
+ CONFIG_SYS_PCI1_IO_PHYS,
+ CONFIG_SYS_PCI1_IO_SIZE,
+ PCI_REGION_IO);
+
+ hose->region_count = 2;
+
+ pci_register_hose(hose);
+
+#if defined(CONFIG_MPC8555CDS) || defined(CONFIG_MPC8541CDS)
+ /*
+ * This is a SW workaround for an apparent HW problem
+ * in the PCI controller on the MPC85555/41 CDS boards.
+ * The first config cycle must be to a valid, known
+ * device on the PCI bus in order to trick the PCI
+ * controller state machine into a known valid state.
+ * Without this, the first config cycle has the chance
+ * of hanging the controller permanently, just leaving
+ * it in a semi-working state, or leaving it working.
+ *
+ * Pick on the Tundra, Device 17, to get it right.
+ */
+ {
+ u8 header_type;
+
+ pci_hose_read_config_byte(hose,
+ PCI_BDF(0,BRIDGE_ID,0),
+ PCI_HEADER_TYPE,
+ &header_type);
+ }
+#endif
+
+ hose->last_busno = pci_hose_scan(hose);
+
+#ifdef CONFIG_MPC85XX_PCI2
+ hose = &pci_hose[1];
+
+ hose->first_busno = pci_hose[0].last_busno + 1;
+ hose->last_busno = 0xff;
+
+ pci_setup_indirect(hose,
+ (CONFIG_SYS_IMMR+0x9000),
+ (CONFIG_SYS_IMMR+0x9004));
+
+ dev = PCI_BDF(hose->first_busno, 0, 0);
+ pci_hose_read_config_word (hose, dev, PCI_COMMAND, &reg16);
+ reg16 |= PCI_COMMAND_SERR | PCI_COMMAND_MASTER | PCI_COMMAND_MEMORY;
+ pci_hose_write_config_word(hose, dev, PCI_COMMAND, reg16);
+
+ /*
+ * Clear non-reserved bits in status register.
+ */
+ pci_hose_write_config_word(hose, dev, PCI_STATUS, 0xffff);
+
+ pcix2->potar1 = (CONFIG_SYS_PCI2_MEM_BUS >> 12) & 0x000fffff;
+ pcix2->potear1 = 0x00000000;
+ pcix2->powbar1 = (CONFIG_SYS_PCI2_MEM_PHYS >> 12) & 0x000fffff;
+ pcix2->powbear1 = 0x00000000;
+ pcix2->powar1 = (POWAR_EN | POWAR_MEM_READ |
+ POWAR_MEM_WRITE | (__ilog2(CONFIG_SYS_PCI2_MEM_SIZE) - 1));
+
+ pcix2->potar2 = (CONFIG_SYS_PCI2_IO_BUS >> 12) & 0x000fffff;
+ pcix2->potear2 = 0x00000000;
+ pcix2->powbar2 = (CONFIG_SYS_PCI2_IO_PHYS >> 12) & 0x000fffff;
+ pcix2->powbear2 = 0x00000000;
+ pcix2->powar2 = (POWAR_EN | POWAR_IO_READ |
+ POWAR_IO_WRITE | (__ilog2(CONFIG_SYS_PCI2_IO_SIZE) - 1));
+
+ pcix2->pitar1 = 0x00000000;
+ pcix2->piwbar1 = 0x00000000;
+ pcix2->piwar1 = (PIWAR_EN | PIWAR_PF | PIWAR_LOCAL |
+ PIWAR_READ_SNOOP | PIWAR_WRITE_SNOOP | PIWAR_MEM_2G);
+
+ pcix2->powar3 = 0;
+ pcix2->powar4 = 0;
+ pcix2->piwar2 = 0;
+ pcix2->piwar3 = 0;
+
+ pci_set_region(hose->regions + 0,
+ CONFIG_SYS_PCI2_MEM_BUS,
+ CONFIG_SYS_PCI2_MEM_PHYS,
+ CONFIG_SYS_PCI2_MEM_SIZE,
+ PCI_REGION_MEM);
+
+ pci_set_region(hose->regions + 1,
+ CONFIG_SYS_PCI2_IO_BUS,
+ CONFIG_SYS_PCI2_IO_PHYS,
+ CONFIG_SYS_PCI2_IO_SIZE,
+ PCI_REGION_IO);
+
+ hose->region_count = 2;
+
+ /*
+ * Hose scan.
+ */
+ pci_register_hose(hose);
+
+ hose->last_busno = pci_hose_scan(hose);
+#endif
+}
+#endif /* !CONFIG_FSL_PCI_INIT */
generated by cgit v1.1 at 2024-11-26 23:17:22 +0000