Add support for PCI-Express on PPC440SPe (Yucca board).
diff --git a/cpu/ppc4xx/440spe_pcie.c b/cpu/ppc4xx/440spe_pcie.c
new file mode 100644
index 0000000..cbc93dd
--- /dev/null
+++ b/cpu/ppc4xx/440spe_pcie.c
@@ -0,0 +1,593 @@
+/*
+ * (C) Copyright 2006
+ * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
+ *
+ * Copyright (c) 2005 Cisco Systems. All rights reserved.
+ * Roland Dreier <rolandd@cisco.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.
+ *
+ */
+
+#include <asm/processor.h>
+#include <asm-ppc/io.h>
+#include <ppc4xx.h>
+#include <common.h>
+#include <pci.h>
+
+#include "440spe_pcie.h"
+
+#if defined(CONFIG_440SPE)
+#if defined(CONFIG_PCI)
+
+enum {
+ PTYPE_ENDPOINT = 0x0,
+ PTYPE_LEGACY_ENDPOINT = 0x1,
+ PTYPE_ROOT_PORT = 0x4,
+
+ LNKW_X1 = 0x1,
+ LNKW_X4 = 0x4,
+ LNKW_X8 = 0x8
+};
+
+static int pcie_read_config(struct pci_controller *hose, unsigned int devfn,
+ int offset, int len, u32 *val) {
+
+ *val = 0;
+ /*
+ * 440SPE implements only one function per port
+ */
+ if (!((PCI_FUNC(devfn) == 0) && (PCI_DEV(devfn) == 1)))
+ return 0;
+
+ devfn = PCI_BDF(0,0,0);
+ offset += devfn << 4;
+
+ switch (len) {
+ case 1:
+ *val = in_8(hose->cfg_data + offset);
+ break;
+ case 2:
+ *val = in_le16((u16 *)(hose->cfg_data + offset));
+ break;
+ default:
+ *val = in_le32((u32 *)(hose->cfg_data + offset));
+ break;
+ }
+ return 0;
+}
+
+static int pcie_write_config(struct pci_controller *hose, unsigned int devfn,
+ int offset, int len, u32 val) {
+
+ /*
+ * 440SPE implements only one function per port
+ */
+ if (!((PCI_FUNC(devfn) == 0) && (PCI_DEV(devfn) == 1)))
+ return 0;
+
+ devfn = PCI_BDF(0,0,0);
+ offset += devfn << 4;
+
+ switch (len) {
+ case 1:
+ out_8(hose->cfg_data + offset, val);
+ break;
+ case 2:
+ out_le16((u16 *)(hose->cfg_data + offset), val);
+ break;
+ default:
+ out_le32((u32 *)(hose->cfg_data + offset), val);
+ break;
+ }
+ return 0;
+}
+
+int pcie_read_config_byte(struct pci_controller *hose,pci_dev_t dev,int offset,u8 *val)
+{
+ u32 v;
+ int rv;
+
+ rv = pcie_read_config(hose, dev, offset, 1, &v);
+ *val = (u8)v;
+ return rv;
+}
+
+int pcie_read_config_word(struct pci_controller *hose,pci_dev_t dev,int offset,u16 *val)
+{
+ u32 v;
+ int rv;
+
+ rv = pcie_read_config(hose, dev, offset, 2, &v);
+ *val = (u16)v;
+ return rv;
+}
+
+int pcie_read_config_dword(struct pci_controller *hose,pci_dev_t dev,int offset,u32 *val)
+{
+ u32 v;
+ int rv;
+
+ rv = pcie_read_config(hose, dev, offset, 3, &v);
+ *val = (u32)v;
+ return rv;
+}
+
+int pcie_write_config_byte(struct pci_controller *hose,pci_dev_t dev,int offset,u8 val)
+{
+ return pcie_write_config(hose,(u32)dev,offset,1,val);
+}
+
+int pcie_write_config_word(struct pci_controller *hose,pci_dev_t dev,int offset,u16 val)
+{
+ return pcie_write_config(hose,(u32)dev,offset,2,(u32 )val);
+}
+
+int pcie_write_config_dword(struct pci_controller *hose,pci_dev_t dev,int offset,u32 val)
+{
+ return pcie_write_config(hose,(u32)dev,offset,3,(u32 )val);
+}
+
+static void ppc440spe_setup_utl(u32 port) {
+
+ volatile void *utl_base = NULL;
+
+ /*
+ * Map UTL registers
+ */
+ switch (port) {
+ case 0:
+ mtdcr(DCRN_PEGPL_REGBAH(PCIE0), 0x0000000d);
+ mtdcr(DCRN_PEGPL_REGBAL(PCIE0), 0x60000400);
+ mtdcr(DCRN_PEGPL_REGMSK(PCIE0), 0xFFFFFC01);
+ mtdcr(DCRN_PEGPL_SPECIAL(PCIE0), 0x68782800);
+ utl_base = (unsigned int *)(CFG_PCIE1_REGBASE);
+ break;
+
+ case 1:
+ mtdcr(DCRN_PEGPL_REGBAH(PCIE1), 0x0000000d);
+ mtdcr(DCRN_PEGPL_REGBAL(PCIE1), 0x60001400);
+ mtdcr(DCRN_PEGPL_REGMSK(PCIE1), 0xFFFFFC01);
+ mtdcr(DCRN_PEGPL_SPECIAL(PCIE1), 0x68782800);
+ utl_base = (unsigned int *)(CFG_PCIE3_REGBASE);
+ break;
+
+ case 2:
+ mtdcr(DCRN_PEGPL_REGBAH(PCIE2), 0x0000000d);
+ mtdcr(DCRN_PEGPL_REGBAL(PCIE2), 0x60002400);
+ mtdcr(DCRN_PEGPL_REGMSK(PCIE2), 0xFFFFFC01);
+ mtdcr(DCRN_PEGPL_SPECIAL(PCIE2), 0x68782800);
+ utl_base = (unsigned int *)(CFG_PCIE5_REGBASE);
+ break;
+ }
+
+ /*
+ * Set buffer allocations and then assert VRB and TXE.
+ */
+ out_be32(utl_base + PEUTL_OUTTR, 0x08000000);
+ out_be32(utl_base + PEUTL_INTR, 0x02000000);
+ out_be32(utl_base + PEUTL_OPDBSZ, 0x10000000);
+ out_be32(utl_base + PEUTL_PBBSZ, 0x53000000);
+ out_be32(utl_base + PEUTL_IPHBSZ, 0x08000000);
+ out_be32(utl_base + PEUTL_IPDBSZ, 0x10000000);
+ out_be32(utl_base + PEUTL_RCIRQEN, 0x00f00000);
+ out_be32(utl_base + PEUTL_PCTL, 0x8080007d);
+}
+
+static int check_error(void)
+{
+ u32 valPE0, valPE1, valPE2;
+ int err = 0;
+
+ /* SDR0_PEGPLLLCT1 reset */
+ if (!(valPE0 = SDR_READ(PESDR0_PLLLCT1) & 0x01000000)) {
+ printf("PCIE: SDR0_PEGPLLLCT1 reset error 0x%x\n", valPE0);
+ }
+
+ valPE0 = SDR_READ(PESDR0_RCSSET);
+ valPE1 = SDR_READ(PESDR1_RCSSET);
+ valPE2 = SDR_READ(PESDR2_RCSSET);
+
+ /* SDR0_PExRCSSET rstgu */
+ if (!(valPE0 & 0x01000000) ||
+ !(valPE1 & 0x01000000) ||
+ !(valPE2 & 0x01000000)) {
+ printf("PCIE: SDR0_PExRCSSET rstgu error\n");
+ err = -1;
+ }
+
+ /* SDR0_PExRCSSET rstdl */
+ if (!(valPE0 & 0x00010000) ||
+ !(valPE1 & 0x00010000) ||
+ !(valPE2 & 0x00010000)) {
+ printf("PCIE: SDR0_PExRCSSET rstdl error\n");
+ err = -1;
+ }
+
+ /* SDR0_PExRCSSET rstpyn */
+ if ((valPE0 & 0x00001000) ||
+ (valPE1 & 0x00001000) ||
+ (valPE2 & 0x00001000)) {
+ printf("PCIE: SDR0_PExRCSSET rstpyn error\n");
+ err = -1;
+ }
+
+ /* SDR0_PExRCSSET hldplb */
+ if ((valPE0 & 0x10000000) ||
+ (valPE1 & 0x10000000) ||
+ (valPE2 & 0x10000000)) {
+ printf("PCIE: SDR0_PExRCSSET hldplb error\n");
+ err = -1;
+ }
+
+ /* SDR0_PExRCSSET rdy */
+ if ((valPE0 & 0x00100000) ||
+ (valPE1 & 0x00100000) ||
+ (valPE2 & 0x00100000)) {
+ printf("PCIE: SDR0_PExRCSSET rdy error\n");
+ err = -1;
+ }
+
+ /* SDR0_PExRCSSET shutdown */
+ if ((valPE0 & 0x00000100) ||
+ (valPE1 & 0x00000100) ||
+ (valPE2 & 0x00000100)) {
+ printf("PCIE: SDR0_PExRCSSET shutdown error\n");
+ err = -1;
+ }
+ return err;
+}
+
+/*
+ * Initialize PCI Express core
+ */
+int ppc440spe_init_pcie(void)
+{
+ int time_out = 20;
+
+ /* Set PLL clock receiver to LVPECL */
+ SDR_WRITE(PESDR0_PLLLCT1, SDR_READ(PESDR0_PLLLCT1) | 1 << 28);
+
+ if (check_error())
+ return -1;
+
+ if (!(SDR_READ(PESDR0_PLLLCT2) & 0x10000))
+ {
+ printf("PCIE: PESDR_PLLCT2 resistance calibration failed (0x%08x)\n",
+ SDR_READ(PESDR0_PLLLCT2));
+ return -1;
+ }
+ /* De-assert reset of PCIe PLL, wait for lock */
+ SDR_WRITE(PESDR0_PLLLCT1, SDR_READ(PESDR0_PLLLCT1) & ~(1 << 24));
+ udelay(3);
+
+ while(time_out) {
+ if (!(SDR_READ(PESDR0_PLLLCT3) & 0x10000000)) {
+ time_out--;
+ udelay(1);
+ } else
+ break;
+ }
+ if (!time_out) {
+ printf("PCIE: VCO output not locked\n");
+ return -1;
+ }
+ return 0;
+}
+
+int ppc440spe_init_pcie_rootport(int port)
+{
+ static int core_init;
+ volatile u32 val = 0;
+ int attempts;
+
+ if (!core_init) {
+ ++core_init;
+ if (ppc440spe_init_pcie())
+ return -1;
+ }
+
+ /*
+ * Initialize various parts of the PCI Express core for our port:
+ *
+ * - Set as a root port and enable max width
+ * (PXIE0 -> X8, PCIE1 and PCIE2 -> X4).
+ * - Set up UTL configuration.
+ * - Increase SERDES drive strength to levels suggested by AMCC.
+ * - De-assert RSTPYN, RSTDL and RSTGU.
+ *
+ * NOTICE for revB chip: PESDRn_UTLSET2 is not set - we leave it with
+ * default setting 0x11310000. The register has new fields,
+ * PESDRn_UTLSET2[LKINE] in particular: clearing it leads to PCIE core
+ * hang.
+ */
+ switch (port) {
+ case 0:
+ SDR_WRITE(PESDR0_DLPSET, 1 << 24 | PTYPE_ROOT_PORT << 20 | LNKW_X8 << 12);
+
+ SDR_WRITE(PESDR0_UTLSET1, 0x21222222);
+ if (!ppc440spe_revB())
+ SDR_WRITE(PESDR0_UTLSET2, 0x11000000);
+ SDR_WRITE(PESDR0_HSSL0SET1, 0x35000000);
+ SDR_WRITE(PESDR0_HSSL1SET1, 0x35000000);
+ SDR_WRITE(PESDR0_HSSL2SET1, 0x35000000);
+ SDR_WRITE(PESDR0_HSSL3SET1, 0x35000000);
+ SDR_WRITE(PESDR0_HSSL4SET1, 0x35000000);
+ SDR_WRITE(PESDR0_HSSL5SET1, 0x35000000);
+ SDR_WRITE(PESDR0_HSSL6SET1, 0x35000000);
+ SDR_WRITE(PESDR0_HSSL7SET1, 0x35000000);
+ SDR_WRITE(PESDR0_RCSSET,
+ (SDR_READ(PESDR0_RCSSET) & ~(1 << 24 | 1 << 16)) | 1 << 12);
+ break;
+
+ case 1:
+ SDR_WRITE(PESDR1_DLPSET, 1 << 24 | PTYPE_ROOT_PORT << 20 | LNKW_X4 << 12);
+ SDR_WRITE(PESDR1_UTLSET1, 0x21222222);
+ if (!ppc440spe_revB())
+ SDR_WRITE(PESDR1_UTLSET2, 0x11000000);
+ SDR_WRITE(PESDR1_HSSL0SET1, 0x35000000);
+ SDR_WRITE(PESDR1_HSSL1SET1, 0x35000000);
+ SDR_WRITE(PESDR1_HSSL2SET1, 0x35000000);
+ SDR_WRITE(PESDR1_HSSL3SET1, 0x35000000);
+ SDR_WRITE(PESDR1_RCSSET,
+ (SDR_READ(PESDR1_RCSSET) & ~(1 << 24 | 1 << 16)) | 1 << 12);
+ break;
+
+ case 2:
+ SDR_WRITE(PESDR2_DLPSET, 1 << 24 | PTYPE_ROOT_PORT << 20 | LNKW_X4 << 12);
+ SDR_WRITE(PESDR2_UTLSET1, 0x21222222);
+ if (!ppc440spe_revB())
+ SDR_WRITE(PESDR2_UTLSET2, 0x11000000);
+ SDR_WRITE(PESDR2_HSSL0SET1, 0x35000000);
+ SDR_WRITE(PESDR2_HSSL1SET1, 0x35000000);
+ SDR_WRITE(PESDR2_HSSL2SET1, 0x35000000);
+ SDR_WRITE(PESDR2_HSSL3SET1, 0x35000000);
+ SDR_WRITE(PESDR2_RCSSET,
+ (SDR_READ(PESDR2_RCSSET) & ~(1 << 24 | 1 << 16)) | 1 << 12);
+ break;
+ }
+ /*
+ * Notice: the following delay has critical impact on device
+ * initialization - if too short (<50ms) the link doesn't get up.
+ */
+ mdelay(100);
+
+ switch (port) {
+ case 0: val = SDR_READ(PESDR0_RCSSTS); break;
+ case 1: val = SDR_READ(PESDR1_RCSSTS); break;
+ case 2: val = SDR_READ(PESDR2_RCSSTS); break;
+ }
+
+ if (val & (1 << 20)) {
+ printf("PCIE%d: PGRST failed %08x\n", port, val);
+ return -1;
+ }
+
+ /*
+ * Verify link is up
+ */
+ val = 0;
+ switch (port)
+ {
+ case 0:
+ val = SDR_READ(PESDR0_LOOP);
+ break;
+ case 1:
+ val = SDR_READ(PESDR1_LOOP);
+ break;
+ case 2:
+ val = SDR_READ(PESDR2_LOOP);
+ break;
+ }
+ if (!(val & 0x00001000)) {
+ printf("PCIE%d: link is not up.\n", port);
+ return -1;
+ }
+
+ /*
+ * Setup UTL registers - but only on revA!
+ * We use default settings for revB chip.
+ */
+ if (!ppc440spe_revB())
+ ppc440spe_setup_utl(port);
+
+ /*
+ * We map PCI Express configuration access into the 512MB regions
+ *
+ * NOTICE: revB is very strict about PLB real addressess and ranges to
+ * be mapped for config space; it seems to only work with d_nnnn_nnnn
+ * range (hangs the core upon config transaction attempts when set
+ * otherwise) while revA uses c_nnnn_nnnn.
+ *
+ * For revA:
+ * PCIE0: 0xc_4000_0000
+ * PCIE1: 0xc_8000_0000
+ * PCIE2: 0xc_c000_0000
+ *
+ * For revB:
+ * PCIE0: 0xd_0000_0000
+ * PCIE1: 0xd_2000_0000
+ * PCIE2: 0xd_4000_0000
+ */
+ switch (port) {
+ case 0:
+ if (ppc440spe_revB()) {
+ mtdcr(DCRN_PEGPL_CFGBAH(PCIE0), 0x0000000d);
+ mtdcr(DCRN_PEGPL_CFGBAL(PCIE0), 0x00000000);
+ } else {
+ /* revA */
+ mtdcr(DCRN_PEGPL_CFGBAH(PCIE0), 0x0000000c);
+ mtdcr(DCRN_PEGPL_CFGBAL(PCIE0), 0x40000000);
+ }
+ mtdcr(DCRN_PEGPL_CFGMSK(PCIE0), 0xe0000001); /* 512MB region, valid */
+ break;
+
+ case 1:
+ if (ppc440spe_revB()) {
+ mtdcr(DCRN_PEGPL_CFGBAH(PCIE1), 0x0000000d);
+ mtdcr(DCRN_PEGPL_CFGBAL(PCIE1), 0x20000000);
+ } else {
+ mtdcr(DCRN_PEGPL_CFGBAH(PCIE1), 0x0000000c);
+ mtdcr(DCRN_PEGPL_CFGBAL(PCIE1), 0x80000000);
+ }
+ mtdcr(DCRN_PEGPL_CFGMSK(PCIE1), 0xe0000001); /* 512MB region, valid */
+ break;
+
+ case 2:
+ if (ppc440spe_revB()) {
+ mtdcr(DCRN_PEGPL_CFGBAH(PCIE2), 0x0000000d);
+ mtdcr(DCRN_PEGPL_CFGBAL(PCIE2), 0x40000000);
+ } else {
+ mtdcr(DCRN_PEGPL_CFGBAH(PCIE2), 0x0000000c);
+ mtdcr(DCRN_PEGPL_CFGBAL(PCIE2), 0xc0000000);
+ }
+ mtdcr(DCRN_PEGPL_CFGMSK(PCIE2), 0xe0000001); /* 512MB region, valid */
+ break;
+ }
+
+ /*
+ * Check for VC0 active and assert RDY.
+ */
+ attempts = 10;
+ switch (port) {
+ case 0:
+ while(!(SDR_READ(PESDR0_RCSSTS) & (1 << 16))) {
+ if (!(attempts--)) {
+ printf("PCIE0: VC0 not active\n");
+ return -1;
+ }
+ mdelay(1000);
+ }
+ SDR_WRITE(PESDR0_RCSSET, SDR_READ(PESDR0_RCSSET) | 1 << 20);
+ break;
+ case 1:
+ while(!(SDR_READ(PESDR1_RCSSTS) & (1 << 16))) {
+ if (!(attempts--)) {
+ printf("PCIE1: VC0 not active\n");
+ return -1;
+ }
+ mdelay(1000);
+ }
+
+ SDR_WRITE(PESDR1_RCSSET, SDR_READ(PESDR1_RCSSET) | 1 << 20);
+ break;
+ case 2:
+ while(!(SDR_READ(PESDR2_RCSSTS) & (1 << 16))) {
+ if (!(attempts--)) {
+ printf("PCIE2: VC0 not active\n");
+ return -1;
+ }
+ mdelay(1000);
+ }
+
+ SDR_WRITE(PESDR2_RCSSET, SDR_READ(PESDR2_RCSSET) | 1 << 20);
+ break;
+ }
+ mdelay(100);
+
+ return 0;
+}
+
+void ppc440spe_setup_pcie(struct pci_controller *hose, int port)
+{
+ volatile void *mbase = NULL;
+
+ 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);
+
+ switch(port) {
+ case 0:
+ mbase = (u32 *)CFG_PCIE0_XCFGBASE;
+ hose->cfg_data = (u8 *)CFG_PCIE0_CFGBASE;
+ break;
+ case 1:
+ mbase = (u32 *)CFG_PCIE1_XCFGBASE;
+ hose->cfg_data = (u8 *)CFG_PCIE1_CFGBASE;
+ break;
+ case 2:
+ mbase = (u32 *)CFG_PCIE2_XCFGBASE;
+ hose->cfg_data = (u8 *)CFG_PCIE2_CFGBASE;
+ break;
+ }
+
+ /*
+ * Set bus numbers on our root port
+ */
+ if (ppc440spe_revB()) {
+ out_8((u8 *)mbase + PCI_PRIMARY_BUS, 0);
+ out_8((u8 *)mbase + PCI_SECONDARY_BUS, 1);
+ out_8((u8 *)mbase + PCI_SUBORDINATE_BUS, 1);
+ } else {
+ out_8((u8 *)mbase + PCI_PRIMARY_BUS, 0);
+ out_8((u8 *)mbase + PCI_SECONDARY_BUS, 0);
+ }
+
+ /*
+ * Set up outbound translation to hose->mem_space from PLB
+ * addresses at an offset of 0xd_0000_0000. We set the low
+ * bits of the mask to 11 to turn off splitting into 8
+ * subregions and to enable the outbound translation.
+ */
+ out_le32(mbase + PECFG_POM0LAH, 0x00000000);
+ out_le32(mbase + PECFG_POM0LAL, (CFG_PCIE_MEMBASE +
+ port * CFG_PCIE_MEMSIZE));
+
+ switch (port) {
+ case 0:
+ mtdcr(DCRN_PEGPL_OMR1BAH(PCIE0), 0x0000000d);
+ mtdcr(DCRN_PEGPL_OMR1BAL(PCIE0), CFG_PCIE_MEMBASE +
+ port * CFG_PCIE_MEMSIZE);
+ mtdcr(DCRN_PEGPL_OMR1MSKH(PCIE0), 0x7fffffff);
+ mtdcr(DCRN_PEGPL_OMR1MSKL(PCIE0),
+ ~(CFG_PCIE_MEMSIZE - 1) | 3);
+ break;
+ case 1:
+ mtdcr(DCRN_PEGPL_OMR1BAH(PCIE1), 0x0000000d);
+ mtdcr(DCRN_PEGPL_OMR1BAL(PCIE1), (CFG_PCIE_MEMBASE +
+ port * CFG_PCIE_MEMSIZE));
+ mtdcr(DCRN_PEGPL_OMR1MSKH(PCIE1), 0x7fffffff);
+ mtdcr(DCRN_PEGPL_OMR1MSKL(PCIE1),
+ ~(CFG_PCIE_MEMSIZE - 1) | 3);
+ break;
+ case 2:
+ mtdcr(DCRN_PEGPL_OMR1BAH(PCIE2), 0x0000000d);
+ mtdcr(DCRN_PEGPL_OMR1BAL(PCIE2), (CFG_PCIE_MEMBASE +
+ port * CFG_PCIE_MEMSIZE));
+ mtdcr(DCRN_PEGPL_OMR1MSKH(PCIE2), 0x7fffffff);
+ mtdcr(DCRN_PEGPL_OMR1MSKL(PCIE2),
+ ~(CFG_PCIE_MEMSIZE - 1) | 3);
+ break;
+ }
+
+ /* Set up 16GB inbound memory window at 0 */
+ out_le32(mbase + PCI_BASE_ADDRESS_0, 0);
+ out_le32(mbase + PCI_BASE_ADDRESS_1, 0);
+ out_le32(mbase + PECFG_BAR0HMPA, 0x7fffffc);
+ out_le32(mbase + PECFG_BAR0LMPA, 0);
+ out_le32(mbase + PECFG_PIM0LAL, 0);
+ out_le32(mbase + PECFG_PIM0LAH, 0);
+ out_le32(mbase + PECFG_PIMEN, 0x1);
+
+ /* Enable I/O, Mem, and Busmaster cycles */
+ out_le16((u16 *)(mbase + PCI_COMMAND),
+ in_le16((u16 *)(mbase + PCI_COMMAND)) |
+ PCI_COMMAND_IO | PCI_COMMAND_MEMORY | PCI_COMMAND_MASTER);
+}
+#endif /* CONFIG_PCI */
+#endif /* CONFIG_440SPE */