avionic design with actual uboot and tooling

submodule of avionic design uboot bootloader and with included tools to
get you started , read readme.md and readme-tk1-loader.md

u-boot/board/esd/common/pci.c

@@ -0,0 +1,186 @@
+/*
+ * (C) Copyright 2001
+ * Stefan Roese, esd gmbh germany, stefan.roese@esd-electronics.com
+ *
+ * SPDX-License-Identifier:	GPL-2.0+
+ */
+
+#include <common.h>
+#include <asm/ppc4xx.h>
+#include <asm/processor.h>
+#include <pci.h>
+
+
+u_long pci9054_iobase;
+
+
+#define PCI_PRIMARY_CAR	(0x500000dc) /* PCI config address reg */
+#define PCI_PRIMARY_CDR	(0x80000000) /* PCI config data    reg */
+
+
+/*-----------------------------------------------------------------------------+
+|  Subroutine:  pci9054_read_config_dword
+|  Description: Read a PCI configuration register
+|  Inputs:
+|               hose            PCI Controller
+|               dev             PCI Bus+Device+Function number
+|               offset          Configuration register number
+|               value           Address of the configuration register value
+|  Return value:
+|               0               Successful
++-----------------------------------------------------------------------------*/
+int pci9054_read_config_dword(struct pci_controller *hose,
+			      pci_dev_t dev, int offset, u32* value)
+{
+  unsigned long      conAdrVal;
+  unsigned long      val;
+
+  /* generate coded value for CON_ADR register */
+  conAdrVal = dev | (offset & 0xfc) | 0x80000000;
+
+  /* Load the CON_ADR (CAR) value first, then read from CON_DATA (CDR) */
+  *(unsigned long *)PCI_PRIMARY_CAR = conAdrVal;
+
+  /* Note: *pResult comes back as -1 if machine check happened */
+  val = in32r(PCI_PRIMARY_CDR);
+
+  *value = (unsigned long) val;
+
+  out32r(PCI_PRIMARY_CAR, 0);
+
+  if ((*(unsigned long *)0x50000304) & 0x60000000)
+    {
+      /* clear pci master/target abort bits */
+      *(unsigned long *)0x50000304 = *(unsigned long *)0x50000304;
+    }
+
+  return 0;
+}
+
+/*-----------------------------------------------------------------------------+
+|  Subroutine:  pci9054_write_config_dword
+|  Description: Write a PCI configuration register.
+|  Inputs:
+|               hose            PCI Controller
+|               dev             PCI Bus+Device+Function number
+|               offset          Configuration register number
+|               Value           Configuration register value
+|  Return value:
+|               0               Successful
+| Updated for pass2 errata #6. Need to disable interrupts and clear the
+| PCICFGADR reg after writing the PCICFGDATA reg.
++-----------------------------------------------------------------------------*/
+int pci9054_write_config_dword(struct pci_controller *hose,
+			       pci_dev_t dev, int offset, u32 value)
+{
+  unsigned long      conAdrVal;
+
+  conAdrVal = dev | (offset & 0xfc) | 0x80000000;
+
+  *(unsigned long *)PCI_PRIMARY_CAR = conAdrVal;
+
+  out32r(PCI_PRIMARY_CDR, value);
+
+  out32r(PCI_PRIMARY_CAR, 0);
+
+  /* clear pci master/target abort bits */
+  *(unsigned long *)0x50000304 = *(unsigned long *)0x50000304;
+
+  return (0);
+}
+
+/*-----------------------------------------------------------------------
+ */
+
+#ifdef CONFIG_DASA_SIM
+static void pci_dasa_sim_config_pci9054(struct pci_controller *hose, pci_dev_t dev,
+					struct pci_config_table *_)
+{
+  unsigned int iobase;
+  unsigned short status = 0;
+  unsigned char timer;
+
+  /*
+   * Configure PLX PCI9054
+   */
+  pci_read_config_word(CONFIG_SYS_PCI9054_DEV_FN, PCI_COMMAND, &status);
+  status |= PCI_COMMAND_MASTER | PCI_COMMAND_IO | PCI_COMMAND_MEMORY;
+  pci_write_config_word(CONFIG_SYS_PCI9054_DEV_FN, PCI_COMMAND, status);
+
+  /* Check the latency timer for values >= 0x60.
+   */
+  pci_read_config_byte(CONFIG_SYS_PCI9054_DEV_FN, PCI_LATENCY_TIMER, &timer);
+  if (timer < 0x60)
+    {
+      pci_write_config_byte(CONFIG_SYS_PCI9054_DEV_FN, PCI_LATENCY_TIMER, 0x60);
+    }
+
+  /* Set I/O base register.
+   */
+  pci_write_config_dword(CONFIG_SYS_PCI9054_DEV_FN, PCI_BASE_ADDRESS_0, CONFIG_SYS_PCI9054_IOBASE);
+  pci_read_config_dword(CONFIG_SYS_PCI9054_DEV_FN, PCI_BASE_ADDRESS_0, &iobase);
+
+  pci9054_iobase = pci_mem_to_phys(CONFIG_SYS_PCI9054_DEV_FN, iobase & PCI_BASE_ADDRESS_MEM_MASK);
+
+  if (pci9054_iobase == 0xffffffff)
+    {
+      printf("Error: Can not set I/O base register.\n");
+      return;
+    }
+}
+#endif
+
+static struct pci_config_table pci9054_config_table[] = {
+#ifndef CONFIG_PCI_PNP
+  { PCI_ANY_ID, PCI_ANY_ID, PCI_ANY_ID,
+    PCI_BUS(CONFIG_SYS_ETH_DEV_FN), PCI_DEV(CONFIG_SYS_ETH_DEV_FN), PCI_FUNC(CONFIG_SYS_ETH_DEV_FN),
+    pci_cfgfunc_config_device, { CONFIG_SYS_ETH_IOBASE,
+				 CONFIG_SYS_ETH_IOBASE,
+				 PCI_COMMAND_IO | PCI_COMMAND_MASTER }},
+#ifdef CONFIG_DASA_SIM
+  { PCI_ANY_ID, PCI_ANY_ID, PCI_ANY_ID,
+    PCI_BUS(CONFIG_SYS_PCI9054_DEV_FN), PCI_DEV(CONFIG_SYS_PCI9054_DEV_FN), PCI_FUNC(CONFIG_SYS_PCI9054_DEV_FN),
+    pci_dasa_sim_config_pci9054 },
+#endif
+#endif
+  { }
+};
+
+static struct pci_controller pci9054_hose = {
+  config_table: pci9054_config_table,
+};
+
+void pci_init_board(void)
+{
+  struct pci_controller *hose = &pci9054_hose;
+
+  /*
+   * Register the hose
+   */
+  hose->first_busno = 0;
+  hose->last_busno = 0xff;
+
+  /* System memory space */
+  pci_set_region(hose->regions + 0,
+		 0x00000000, 0x00000000, 0x01000000,
+		 PCI_REGION_MEM | PCI_REGION_SYS_MEMORY);
+
+  /* PCI Memory space */
+  pci_set_region(hose->regions + 1,
+		 0x00000000, 0xc0000000, 0x10000000,
+		 PCI_REGION_MEM);
+
+  pci_set_ops(hose,
+	      pci_hose_read_config_byte_via_dword,
+	      pci_hose_read_config_word_via_dword,
+	      pci9054_read_config_dword,
+	      pci_hose_write_config_byte_via_dword,
+	      pci_hose_write_config_word_via_dword,
+	      pci9054_write_config_dword);
+
+  hose->region_count = 2;
+
+  pci_register_hose(hose);
+
+  hose->last_busno = pci_hose_scan(hose);
+}