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-rw-r--r--board/mpc832xemds/pci.c313
1 files changed, 313 insertions, 0 deletions
diff --git a/board/mpc832xemds/pci.c b/board/mpc832xemds/pci.c
new file mode 100644
index 0000000..09f3ac3
--- /dev/null
+++ b/board/mpc832xemds/pci.c
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+/*
+ * Copyright (C) 2006 Freescale Semiconductor, Inc.
+ *
+ * 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.
+ */
+
+/*
+ * PCI Configuration space access support for MPC83xx PCI Bridge
+ */
+#include <asm/mmu.h>
+#include <asm/io.h>
+#include <common.h>
+#include <pci.h>
+#include <i2c.h>
+
+#include <asm/fsl_i2c.h>
+
+DECLARE_GLOBAL_DATA_PTR;
+
+#if defined(CONFIG_PCI)
+#define PCI_FUNCTION_CONFIG 0x44
+#define PCI_FUNCTION_CFG_LOCK 0x20
+
+/*
+ * Initialize PCI Devices, report devices found
+ */
+#ifndef CONFIG_PCI_PNP
+static struct pci_config_table pci_mpc83xxemds_config_table[] = {
+ {
+ PCI_ANY_ID, PCI_ANY_ID, PCI_ANY_ID, PCI_ANY_ID,
+ pci_cfgfunc_config_device,
+ {PCI_ENET0_IOADDR,
+ PCI_ENET0_MEMADDR,
+ PCI_COMMON_MEMORY | PCI_COMMAND_MASTER}
+ },
+ {}
+}
+#endif
+static struct pci_controller hose[] = {
+ {
+#ifndef CONFIG_PCI_PNP
+ config_table:pci_mpc83xxemds_config_table,
+#endif
+ },
+};
+
+/**********************************************************************
+ * pci_init_board()
+ *********************************************************************/
+void pci_init_board(void)
+#ifdef CONFIG_PCISLAVE
+{
+ u16 reg16;
+ volatile immap_t *immr;
+ volatile law83xx_t *pci_law;
+ volatile pot83xx_t *pci_pot;
+ volatile pcictrl83xx_t *pci_ctrl;
+ volatile pciconf83xx_t *pci_conf;
+
+ immr = (immap_t *) CFG_IMMR;
+ pci_law = immr->sysconf.pcilaw;
+ pci_pot = immr->ios.pot;
+ pci_ctrl = immr->pci_ctrl;
+ pci_conf = immr->pci_conf;
+ /*
+ * Configure PCI Inbound Translation Windows
+ */
+ pci_ctrl[0].pitar0 = 0x0;
+ pci_ctrl[0].pibar0 = 0x0;
+ pci_ctrl[0].piwar0 = PIWAR_EN | PIWAR_RTT_SNOOP |
+ PIWAR_WTT_SNOOP | PIWAR_IWS_4K;
+
+ pci_ctrl[0].pitar1 = 0x0;
+ pci_ctrl[0].pibar1 = 0x0;
+ pci_ctrl[0].piebar1 = 0x0;
+ pci_ctrl[0].piwar1 &= ~PIWAR_EN;
+
+ pci_ctrl[0].pitar2 = 0x0;
+ pci_ctrl[0].pibar2 = 0x0;
+ pci_ctrl[0].piebar2 = 0x0;
+ pci_ctrl[0].piwar2 &= ~PIWAR_EN;
+
+ hose[0].first_busno = 0;
+ hose[0].last_busno = 0xff;
+ pci_setup_indirect(&hose[0],
+ (CFG_IMMR + 0x8300), (CFG_IMMR + 0x8304));
+ reg16 = 0xff;
+
+ pci_hose_read_config_word(&hose[0], PCI_BDF(0, 0, 0),
+ PCI_COMMAND, &reg16);
+ reg16 |= PCI_COMMAND_SERR | PCI_COMMAND_MEMORY;
+ pci_hose_write_config_word(&hose[0], PCI_BDF(0, 0, 0),
+ PCI_COMMAND, reg16);
+
+ /*
+ * Clear non-reserved bits in status register.
+ */
+ pci_hose_write_config_word(&hose[0], PCI_BDF(0, 0, 0),
+ PCI_STATUS, 0xffff);
+ pci_hose_write_config_byte(&hose[0], PCI_BDF(0, 0, 0),
+ PCI_LATENCY_TIMER, 0x80);
+
+ /*
+ * Unlock configuration lock in PCI function configuration register.
+ */
+ pci_hose_read_config_word(&hose[0], PCI_BDF(0, 0, 0),
+ PCI_FUNCTION_CONFIG, &reg16);
+ reg16 &= ~(PCI_FUNCTION_CFG_LOCK);
+ pci_hose_write_config_word(&hose[0], PCI_BDF(0, 0, 0),
+ PCI_FUNCTION_CONFIG, reg16);
+
+ printf("Enabled PCI 32bit Agent Mode\n");
+}
+#else
+{
+ volatile immap_t *immr;
+ volatile clk83xx_t *clk;
+ volatile law83xx_t *pci_law;
+ volatile pot83xx_t *pci_pot;
+ volatile pcictrl83xx_t *pci_ctrl;
+ volatile pciconf83xx_t *pci_conf;
+
+ u8 val8, orig_i2c_bus;
+ u16 reg16;
+ u32 val32;
+ u32 dev;
+
+ immr = (immap_t *) CFG_IMMR;
+ clk = (clk83xx_t *) & immr->clk;
+ pci_law = immr->sysconf.pcilaw;
+ pci_pot = immr->ios.pot;
+ pci_ctrl = immr->pci_ctrl;
+ pci_conf = immr->pci_conf;
+ /*
+ * Configure PCI controller and PCI_CLK_OUTPUT both in 66M mode
+ */
+ val32 = clk->occr;
+ udelay(2000);
+#if defined(PCI_66M)
+ clk->occr = OCCR_PCICOE0 | OCCR_PCICOE1 | OCCR_PCICOE2;
+ printf("PCI clock is 66MHz\n");
+#elif defined(PCI_33M)
+ clk->occr = OCCR_PCICOE0 | OCCR_PCICOE1 | OCCR_PCICOE2 |
+ OCCR_PCICD0 | OCCR_PCICD1 | OCCR_PCICD2 | OCCR_PCICR;
+ printf("PCI clock is 33MHz\n");
+#else
+ clk->occr = OCCR_PCICOE0 | OCCR_PCICOE1 | OCCR_PCICOE2;
+ printf("PCI clock is 66MHz\n");
+#endif
+ udelay(2000);
+
+ /*
+ * Configure PCI Local Access Windows
+ */
+ pci_law[0].bar = CFG_PCI_MEM_PHYS & LAWBAR_BAR;
+ pci_law[0].ar = LAWAR_EN | LAWAR_SIZE_512M;
+
+ pci_law[1].bar = CFG_PCI_IO_PHYS & LAWBAR_BAR;
+ pci_law[1].ar = LAWAR_EN | LAWAR_SIZE_1M;
+
+ /*
+ * Configure PCI Outbound Translation Windows
+ */
+
+ /* PCI mem space - prefetch */
+ pci_pot[0].potar = (CFG_PCI_MEM_BASE >> 12) & POTAR_TA_MASK;
+ pci_pot[0].pobar = (CFG_PCI_MEM_PHYS >> 12) & POBAR_BA_MASK;
+ pci_pot[0].pocmr =
+ POCMR_EN | POCMR_SE | (POCMR_CM_256M & POCMR_CM_MASK);
+
+ /* PCI mmio - non-prefetch mem space */
+ pci_pot[1].potar = (CFG_PCI_MMIO_BASE >> 12) & POTAR_TA_MASK;
+ pci_pot[1].pobar = (CFG_PCI_MMIO_PHYS >> 12) & POBAR_BA_MASK;
+ pci_pot[1].pocmr = POCMR_EN | (POCMR_CM_256M & POCMR_CM_MASK);
+
+ /* PCI IO space */
+ pci_pot[2].potar = (CFG_PCI_IO_BASE >> 12) & POTAR_TA_MASK;
+ pci_pot[2].pobar = (CFG_PCI_IO_PHYS >> 12) & POBAR_BA_MASK;
+ pci_pot[2].pocmr = POCMR_EN | POCMR_IO | (POCMR_CM_1M & POCMR_CM_MASK);
+
+ /*
+ * Configure PCI Inbound Translation Windows
+ */
+ pci_ctrl[0].pitar1 = (CFG_PCI_SLV_MEM_LOCAL >> 12) & PITAR_TA_MASK;
+ pci_ctrl[0].pibar1 = (CFG_PCI_SLV_MEM_BUS >> 12) & PIBAR_MASK;
+ pci_ctrl[0].piebar1 = 0x0;
+ pci_ctrl[0].piwar1 =
+ PIWAR_EN | PIWAR_PF | PIWAR_RTT_SNOOP | PIWAR_WTT_SNOOP |
+ PIWAR_IWS_2G;
+
+ /*
+ * Assign PIB PMC slot to desired PCI bus
+ */
+
+ /* Switch temporarily to I2C bus #2 */
+ orig_i2c_bus = i2c_get_bus_num();
+ i2c_set_bus_num(1);
+
+ val8 = 0;
+ i2c_write(0x23, 0x6, 1, &val8, 1);
+ i2c_write(0x23, 0x7, 1, &val8, 1);
+ val8 = 0xff;
+ i2c_write(0x23, 0x2, 1, &val8, 1);
+ i2c_write(0x23, 0x3, 1, &val8, 1);
+
+ val8 = 0;
+ i2c_write(0x26, 0x6, 1, &val8, 1);
+ val8 = 0x34;
+ i2c_write(0x26, 0x7, 1, &val8, 1);
+
+ val8 = 0xf9; /* PMC2, PMC3 slot to PCI bus */
+ i2c_write(0x26, 0x2, 1, &val8, 1);
+ val8 = 0xff;
+ i2c_write(0x26, 0x3, 1, &val8, 1);
+
+ val8 = 0;
+ i2c_write(0x27, 0x6, 1, &val8, 1);
+ i2c_write(0x27, 0x7, 1, &val8, 1);
+ val8 = 0xff;
+ i2c_write(0x27, 0x2, 1, &val8, 1);
+ val8 = 0xef;
+ i2c_write(0x27, 0x3, 1, &val8, 1);
+ asm("eieio");
+
+ /* Reset to original I2C bus */
+ i2c_set_bus_num(orig_i2c_bus);
+
+ /*
+ * Release PCI RST Output signal
+ */
+ udelay(2000);
+ pci_ctrl[0].gcr = 1;
+ udelay(2000);
+
+ hose[0].first_busno = 0;
+ hose[0].last_busno = 0xff;
+
+ /* PCI memory prefetch space */
+ pci_set_region(hose[0].regions + 0,
+ CFG_PCI_MEM_BASE,
+ CFG_PCI_MEM_PHYS,
+ CFG_PCI_MEM_SIZE, PCI_REGION_MEM | PCI_REGION_PREFETCH);
+
+ /* PCI memory space */
+ pci_set_region(hose[0].regions + 1,
+ CFG_PCI_MMIO_BASE,
+ CFG_PCI_MMIO_PHYS, CFG_PCI_MMIO_SIZE, PCI_REGION_MEM);
+
+ /* PCI IO space */
+ pci_set_region(hose[0].regions + 2,
+ CFG_PCI_IO_BASE,
+ CFG_PCI_IO_PHYS, CFG_PCI_IO_SIZE, PCI_REGION_IO);
+
+ /* System memory space */
+ pci_set_region(hose[0].regions + 3,
+ CFG_PCI_SLV_MEM_LOCAL,
+ CFG_PCI_SLV_MEM_BUS,
+ CFG_PCI_SLV_MEM_SIZE,
+ PCI_REGION_MEM | PCI_REGION_MEMORY);
+
+ hose[0].region_count = 4;
+
+ pci_setup_indirect(&hose[0],
+ (CFG_IMMR + 0x8300), (CFG_IMMR + 0x8304));
+
+ pci_register_hose(hose);
+
+ /*
+ * Write command register
+ */
+ reg16 = 0xff;
+ dev = PCI_BDF(0, 0, 0);
+ pci_hose_read_config_word(&hose[0], dev, PCI_COMMAND, &reg16);
+ reg16 |= PCI_COMMAND_SERR | PCI_COMMAND_MASTER | PCI_COMMAND_MEMORY;
+ pci_hose_write_config_word(&hose[0], dev, PCI_COMMAND, reg16);
+
+ /*
+ * Clear non-reserved bits in status register.
+ */
+ pci_hose_write_config_word(&hose[0], dev, PCI_STATUS, 0xffff);
+ pci_hose_write_config_byte(&hose[0], dev, PCI_LATENCY_TIMER, 0x80);
+ pci_hose_write_config_byte(&hose[0], dev, PCI_CACHE_LINE_SIZE, 0x08);
+
+ printf("PCI 32bit bus on PMC2 & PMC3\n");
+
+ /*
+ * Hose scan.
+ */
+ hose->last_busno = pci_hose_scan(hose);
+}
+#endif /* CONFIG_PCISLAVE */
+
+#ifdef CONFIG_OF_FLAT_TREE
+void
+ft_pci_setup(void *blob, bd_t *bd)
+{
+ u32 *p;
+ int len;
+
+ p = (u32 *)ft_get_prop(blob, "/" OF_SOC "/pci@8500/bus-range", &len);
+ if (p != NULL) {
+ p[0] = hose[0].first_busno;
+ p[1] = hose[0].last_busno;
+ }
+}
+#endif /* CONFIG_OF_FLAT_TREE */
+#endif /* CONFIG_PCI */
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