#include <ppc4xx.h>
#include <asm/processor.h>
#include <asm-ppc/io.h>
+#include <asm/errno.h>
#if (defined(CONFIG_440SPE) || defined(CONFIG_405EX) || \
defined(CONFIG_460EX) || defined(CONFIG_460GT)) && \
LNKW_X8 = 0x8
};
+static struct pci_controller pcie_hose[CONFIG_SYS_PCIE_NR_PORTS];
+
+/*
+ * Per default, all cards are present, so we need to check if the
+ * link comes up.
+ */
+int __board_pcie_card_present(int port)
+{
+ return 1;
+}
+int board_pcie_card_present(int port)
+ __attribute__((weak, alias("__board_pcie_card_present")));
+
+/*
+ * Some boards have runtime detection of the first and last PCIe
+ * slot used, so let's provide weak default functions for the
+ * common version.
+ */
+int __board_pcie_first(void)
+{
+ return 0;
+}
+int board_pcie_first(void)
+ __attribute__((weak, alias("__board_pcie_first")));
+
+int __board_pcie_last(void)
+{
+ return CONFIG_SYS_PCIE_NR_PORTS - 1;
+}
+int board_pcie_last(void)
+ __attribute__((weak, alias("__board_pcie_last")));
+
+void __board_pcie_setup_port(int port, int rootpoint)
+{
+ /* noting in this weak default implementation */
+}
+void board_pcie_setup_port(int port, int rootpoint)
+ __attribute__((weak, alias("__board_pcie_setup_port")));
+
+void pcie_setup_hoses(int busno)
+{
+ struct pci_controller *hose;
+ int i, bus;
+ int ret = 0;
+ char *env;
+ unsigned int delay;
+ int first = board_pcie_first();
+ int last = board_pcie_last();
+
+ /*
+ * Assume we're called after the PCI(X) hose(s) are initialized,
+ * which takes bus ID 0... and therefore start numbering PCIe's
+ * from the next number.
+ */
+ bus = busno;
+
+ for (i = first; i <= last; i++) {
+ /*
+ * Some boards (e.g. Katmai) can detects via hardware
+ * if a PCIe card is plugged, so let's check this.
+ */
+ if (!board_pcie_card_present(i))
+ continue;
+
+ if (is_end_point(i)) {
+ board_pcie_setup_port(i, 0);
+ ret = ppc4xx_init_pcie_endport(i);
+ } else {
+ board_pcie_setup_port(i, 1);
+ ret = ppc4xx_init_pcie_rootport(i);
+ }
+ if (ret == -ENODEV)
+ continue;
+ if (ret) {
+ printf("PCIE%d: initialization as %s failed\n", i,
+ is_end_point(i) ? "endpoint" : "root-complex");
+ continue;
+ }
+
+ hose = &pcie_hose[i];
+ hose->first_busno = bus;
+ hose->last_busno = bus;
+ hose->current_busno = bus;
+
+ /* setup mem resource */
+ pci_set_region(hose->regions + 0,
+ CONFIG_SYS_PCIE_MEMBASE + i * CONFIG_SYS_PCIE_MEMSIZE,
+ CONFIG_SYS_PCIE_MEMBASE + i * CONFIG_SYS_PCIE_MEMSIZE,
+ CONFIG_SYS_PCIE_MEMSIZE,
+ PCI_REGION_MEM);
+ hose->region_count = 1;
+ pci_register_hose(hose);
+
+ if (is_end_point(i)) {
+ ppc4xx_setup_pcie_endpoint(hose, i);
+ /*
+ * Reson for no scanning is endpoint can not generate
+ * upstream configuration accesses.
+ */
+ } else {
+ ppc4xx_setup_pcie_rootpoint(hose, i);
+ env = getenv ("pciscandelay");
+ if (env != NULL) {
+ delay = simple_strtoul(env, NULL, 10);
+ if (delay > 5)
+ printf("Warning, expect noticable delay before "
+ "PCIe scan due to 'pciscandelay' value!\n");
+ mdelay(delay * 1000);
+ }
+
+ /*
+ * Config access can only go down stream
+ */
+ hose->last_busno = pci_hose_scan(hose);
+ bus = hose->last_busno + 1;
+ }
+ }
+}
+
static int validate_endpoint(struct pci_controller *hose)
{
if (hose->cfg_data == (u8 *)CONFIG_SYS_PCIE0_CFGBASE)
/* Set PLL clock receiver to LVPECL */
SDR_WRITE(PESDR0_PLLLCT1, SDR_READ(PESDR0_PLLLCT1) | 1 << 28);
- if (check_error())
+ if (check_error()) {
+ printf("ERROR: failed to set PCIe reference clock receiver --"
+ "PESDR0_PLLLCT1 = 0x%08x\n", SDR_READ(PESDR0_PLLLCT1));
+
return -1;
+ }
+
+ /* Did resistance calibration work? */
+ if (!(SDR_READ(PESDR0_PLLLCT2) & 0x10000)) {
+ printf("ERROR: PCIe resistance calibration failed --"
+ "PESDR0_PLLLCT2 = 0x%08x\n", SDR_READ(PESDR0_PLLLCT2));
- 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);
+ udelay(300); /* 300 uS is maximum time lock should take */
while (time_out) {
if (!(SDR_READ(PESDR0_PLLLCT3) & 0x10000000)) {
time_out--;
- udelay(1);
+ udelay(20); /* Wait 20 uS more if needed */
} else
break;
}
if (!time_out) {
- printf("PCIE: VCO output not locked\n");
+ printf("ERROR: PCIe PLL VCO output not locked to ref clock --"
+ "PESDR0_PLLLCTS=0x%08x\n", SDR_READ(PESDR0_PLLLCT3));
+
return -1;
}
return 0;
val = SDR_READ(SDRN_PESDR_LOOP(port));
if (!(val & 0x00001000)) {
printf("PCIE%d: link is not up.\n", port);
- return -1;
+ return -ENODEV;
}
/*
projects / platform / kernel / u-boot.git / blobdiff