--- /dev/null
+/*
+ * Copyright (C) 2007-2009 Freescale Semiconductor, Inc.
+ * Copyright (C) 2008-2009 MontaVista Software, Inc.
+ *
+ * Authors: Tony Li <tony.li@freescale.com>
+ * Anton Vorontsov <avorontsov@ru.mvista.com>
+ *
+ * SPDX-License-Identifier: GPL-2.0+
+ */
+
+#include <common.h>
+#include <pci.h>
+#include <mpc83xx.h>
+#include <asm/io.h>
+
+DECLARE_GLOBAL_DATA_PTR;
+
+#define PCIE_MAX_BUSES 2
+
+static struct {
+ u32 base;
+ u32 size;
+} mpc83xx_pcie_cfg_space[] = {
+ {
+ .base = CONFIG_SYS_PCIE1_CFG_BASE,
+ .size = CONFIG_SYS_PCIE1_CFG_SIZE,
+ },
+#if defined(CONFIG_SYS_PCIE2_CFG_BASE) && defined(CONFIG_SYS_PCIE2_CFG_SIZE)
+ {
+ .base = CONFIG_SYS_PCIE2_CFG_BASE,
+ .size = CONFIG_SYS_PCIE2_CFG_SIZE,
+ },
+#endif
+};
+
+#ifdef CONFIG_83XX_GENERIC_PCIE_REGISTER_HOSES
+
+/* private structure for mpc83xx pcie hose */
+static struct mpc83xx_pcie_priv {
+ u8 index;
+} pcie_priv[PCIE_MAX_BUSES] = {
+ {
+ /* pcie controller 1 */
+ .index = 0,
+ },
+ {
+ /* pcie controller 2 */
+ .index = 1,
+ },
+};
+
+static int mpc83xx_pcie_remap_cfg(struct pci_controller *hose, pci_dev_t dev)
+{
+ int bus = PCI_BUS(dev) - hose->first_busno;
+ immap_t *immr = (immap_t *)CONFIG_SYS_IMMR;
+ struct mpc83xx_pcie_priv *pcie_priv = hose->priv_data;
+ pex83xx_t *pex = &immr->pciexp[pcie_priv->index];
+ struct pex_outbound_window *out_win = &pex->bridge.pex_outbound_win[0];
+ u8 devfn = PCI_DEV(dev) << 3 | PCI_FUNC(dev);
+ u32 dev_base = bus << 24 | devfn << 16;
+
+ if (hose->indirect_type == INDIRECT_TYPE_NO_PCIE_LINK)
+ return -1;
+ /*
+ * Workaround for the HW bug: for Type 0 configure transactions the
+ * PCI-E controller does not check the device number bits and just
+ * assumes that the device number bits are 0.
+ */
+ if (devfn & 0xf8)
+ return -1;
+
+ out_le32(&out_win->tarl, dev_base);
+ return 0;
+}
+
+#define cfg_read(val, addr, type, op) \
+ do { *val = op((type)(addr)); } while (0)
+#define cfg_write(val, addr, type, op) \
+ do { op((type *)(addr), (val)); } while (0)
+
+#define cfg_read_err(val) do { *val = -1; } while (0)
+#define cfg_write_err(val) do { } while (0)
+
+#define PCIE_OP(rw, size, type, op) \
+static int pcie_##rw##_config_##size(struct pci_controller *hose, \
+ pci_dev_t dev, int offset, \
+ type val) \
+{ \
+ int ret; \
+ \
+ ret = mpc83xx_pcie_remap_cfg(hose, dev); \
+ if (ret) { \
+ cfg_##rw##_err(val); \
+ return ret; \
+ } \
+ cfg_##rw(val, (void *)hose->cfg_addr + offset, type, op); \
+ return 0; \
+}
+
+PCIE_OP(read, byte, u8 *, in_8)
+PCIE_OP(read, word, u16 *, in_le16)
+PCIE_OP(read, dword, u32 *, in_le32)
+PCIE_OP(write, byte, u8, out_8)
+PCIE_OP(write, word, u16, out_le16)
+PCIE_OP(write, dword, u32, out_le32)
+
+static void mpc83xx_pcie_register_hose(int bus, struct pci_region *reg,
+ u8 link)
+{
+ extern void disable_addr_trans(void); /* start.S */
+ static struct pci_controller pcie_hose[PCIE_MAX_BUSES];
+ struct pci_controller *hose = &pcie_hose[bus];
+ int i;
+
+ /*
+ * There are no spare BATs to remap all PCI-E windows for U-Boot, so
+ * disable translations. In general, this is not great solution, and
+ * that's why we don't register PCI-E hoses by default.
+ */
+ disable_addr_trans();
+
+ for (i = 0; i < 2; i++, reg++) {
+ if (reg->size == 0)
+ break;
+
+ hose->regions[i] = *reg;
+ hose->region_count++;
+ }
+
+ i = hose->region_count++;
+ hose->regions[i].bus_start = 0;
+ hose->regions[i].phys_start = 0;
+ hose->regions[i].size = gd->ram_size;
+ hose->regions[i].flags = PCI_REGION_MEM | PCI_REGION_SYS_MEMORY;
+
+ i = hose->region_count++;
+ hose->regions[i].bus_start = CONFIG_SYS_IMMR;
+ hose->regions[i].phys_start = CONFIG_SYS_IMMR;
+ hose->regions[i].size = 0x100000;
+ hose->regions[i].flags = PCI_REGION_MEM | PCI_REGION_SYS_MEMORY;
+
+ hose->first_busno = pci_last_busno() + 1;
+ hose->last_busno = 0xff;
+
+ hose->cfg_addr = (unsigned int *)mpc83xx_pcie_cfg_space[bus].base;
+
+ hose->priv_data = &pcie_priv[bus];
+
+ pci_set_ops(hose,
+ pcie_read_config_byte,
+ pcie_read_config_word,
+ pcie_read_config_dword,
+ pcie_write_config_byte,
+ pcie_write_config_word,
+ pcie_write_config_dword);
+
+ if (!link)
+ hose->indirect_type = INDIRECT_TYPE_NO_PCIE_LINK;
+
+ pci_register_hose(hose);
+
+#ifdef CONFIG_PCI_SCAN_SHOW
+ printf("PCI: Bus Dev VenId DevId Class Int\n");
+#endif
+ /*
+ * Hose scan.
+ */
+ hose->last_busno = pci_hose_scan(hose);
+}
+
+#else
+
+static void mpc83xx_pcie_register_hose(int bus, struct pci_region *reg,
+ u8 link) {}
+
+#endif /* CONFIG_83XX_GENERIC_PCIE_REGISTER_HOSES */
+
+static void mpc83xx_pcie_init_bus(int bus, struct pci_region *reg)
+{
+ immap_t *immr = (immap_t *)CONFIG_SYS_IMMR;
+ pex83xx_t *pex = &immr->pciexp[bus];
+ struct pex_outbound_window *out_win;
+ struct pex_inbound_window *in_win;
+ void *hose_cfg_base;
+ unsigned int ram_sz;
+ unsigned int barl;
+ unsigned int tar;
+ u16 reg16;
+ int i;
+
+ /* Enable pex csb bridge inbound & outbound transactions */
+ out_le32(&pex->bridge.pex_csb_ctrl,
+ in_le32(&pex->bridge.pex_csb_ctrl) | PEX_CSB_CTRL_OBPIOE |
+ PEX_CSB_CTRL_IBPIOE);
+
+ /* Enable bridge outbound */
+ out_le32(&pex->bridge.pex_csb_obctrl, PEX_CSB_OBCTRL_PIOE |
+ PEX_CSB_OBCTRL_MEMWE | PEX_CSB_OBCTRL_IOWE |
+ PEX_CSB_OBCTRL_CFGWE);
+
+ out_win = &pex->bridge.pex_outbound_win[0];
+ out_le32(&out_win->ar, PEX_OWAR_EN | PEX_OWAR_TYPE_CFG |
+ mpc83xx_pcie_cfg_space[bus].size);
+ out_le32(&out_win->bar, mpc83xx_pcie_cfg_space[bus].base);
+ out_le32(&out_win->tarl, 0);
+ out_le32(&out_win->tarh, 0);
+
+ for (i = 0; i < 2; i++) {
+ u32 ar;
+
+ if (reg[i].size == 0)
+ break;
+
+ out_win = &pex->bridge.pex_outbound_win[i + 1];
+ out_le32(&out_win->bar, reg[i].phys_start);
+ out_le32(&out_win->tarl, reg[i].bus_start);
+ out_le32(&out_win->tarh, 0);
+ ar = PEX_OWAR_EN | (reg[i].size & PEX_OWAR_SIZE);
+ if (reg[i].flags & PCI_REGION_IO)
+ ar |= PEX_OWAR_TYPE_IO;
+ else
+ ar |= PEX_OWAR_TYPE_MEM;
+ out_le32(&out_win->ar, ar);
+ }
+
+ out_le32(&pex->bridge.pex_csb_ibctrl, PEX_CSB_IBCTRL_PIOE);
+
+ ram_sz = gd->ram_size;
+ barl = 0;
+ tar = 0;
+ i = 0;
+ while (ram_sz > 0) {
+ in_win = &pex->bridge.pex_inbound_win[i];
+ out_le32(&in_win->barl, barl);
+ out_le32(&in_win->barh, 0x0);
+ out_le32(&in_win->tar, tar);
+ if (ram_sz >= 0x10000000) {
+ /* The maxium windows size is 256M */
+ out_le32(&in_win->ar, PEX_IWAR_EN | PEX_IWAR_NSOV |
+ PEX_IWAR_TYPE_PF | 0x0FFFF000);
+ barl += 0x10000000;
+ tar += 0x10000000;
+ ram_sz -= 0x10000000;
+ } else {
+ /* The UM is not clear here.
+ * So, round up to even Mb boundary */
+
+ ram_sz = ram_sz >> (20 +
+ ((ram_sz & 0xFFFFF) ? 1 : 0));
+ if (!(ram_sz % 2))
+ ram_sz -= 1;
+ out_le32(&in_win->ar, PEX_IWAR_EN | PEX_IWAR_NSOV |
+ PEX_IWAR_TYPE_PF | (ram_sz << 20) | 0xFF000);
+ ram_sz = 0;
+ }
+ i++;
+ }
+
+ in_win = &pex->bridge.pex_inbound_win[i];
+ out_le32(&in_win->barl, CONFIG_SYS_IMMR);
+ out_le32(&in_win->barh, 0);
+ out_le32(&in_win->tar, CONFIG_SYS_IMMR);
+ out_le32(&in_win->ar, PEX_IWAR_EN |
+ PEX_IWAR_TYPE_NO_PF | PEX_IWAR_SIZE_1M);
+
+ /* Enable the host virtual INTX interrupts */
+ out_le32(&pex->bridge.pex_int_axi_misc_enb,
+ in_le32(&pex->bridge.pex_int_axi_misc_enb) | 0x1E0);
+
+ /* Hose configure header is memory-mapped */
+ hose_cfg_base = (void *)pex;
+
+ get_clocks();
+ /* Configure the PCIE controller core clock ratio */
+ out_le32(hose_cfg_base + PEX_GCLK_RATIO,
+ (((bus ? gd->arch.pciexp2_clk : gd->arch.pciexp1_clk)
+ / 1000000) * 16) / 333);
+ udelay(1000000);
+
+ /* Do Type 1 bridge configuration */
+ out_8(hose_cfg_base + PCI_PRIMARY_BUS, 0);
+ out_8(hose_cfg_base + PCI_SECONDARY_BUS, 1);
+ out_8(hose_cfg_base + PCI_SUBORDINATE_BUS, 255);
+
+ /*
+ * Write to Command register
+ */
+ reg16 = in_le16(hose_cfg_base + PCI_COMMAND);
+ reg16 |= PCI_COMMAND_MASTER | PCI_COMMAND_MEMORY | PCI_COMMAND_IO |
+ PCI_COMMAND_SERR | PCI_COMMAND_PARITY;
+ out_le16(hose_cfg_base + PCI_COMMAND, reg16);
+
+ /*
+ * Clear non-reserved bits in status register.
+ */
+ out_le16(hose_cfg_base + PCI_STATUS, 0xffff);
+ out_8(hose_cfg_base + PCI_LATENCY_TIMER, 0x80);
+ out_8(hose_cfg_base + PCI_CACHE_LINE_SIZE, 0x08);
+
+ printf("PCIE%d: ", bus);
+
+#define PCI_LTSSM 0x404 /* PCIe Link Training, Status State Machine */
+#define PCI_LTSSM_L0 0x16 /* L0 state */
+ reg16 = in_le16(hose_cfg_base + PCI_LTSSM);
+ if (reg16 >= PCI_LTSSM_L0)
+ printf("link\n");
+ else
+ printf("No link\n");
+
+ mpc83xx_pcie_register_hose(bus, reg, reg16 >= PCI_LTSSM_L0);
+}
+
+/*
+ * The caller must have already set SCCR, SERDES and the PCIE_LAW BARs
+ * must have been set to cover all of the requested regions.
+ */
+void mpc83xx_pcie_init(int num_buses, struct pci_region **reg)
+{
+ int i;
+
+ /*
+ * Release PCI RST Output signal.
+ * Power on to RST high must be at least 100 ms as per PCI spec.
+ * On warm boots only 1 ms is required, but we play it safe.
+ */
+ udelay(100000);
+
+ if (num_buses > ARRAY_SIZE(mpc83xx_pcie_cfg_space)) {
+ printf("Second PCIE host contoller not configured!\n");
+ num_buses = ARRAY_SIZE(mpc83xx_pcie_cfg_space);
+ }
+
+ for (i = 0; i < num_buses; i++)
+ mpc83xx_pcie_init_bus(i, reg[i]);
+}
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