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authorStefan Roese <sr@denx.de>2009-10-29 15:04:35 +0100
committerStefan Roese <sr@denx.de>2009-11-09 11:26:57 +0100
commitb0b867462c569e7accd6f78c942cbab028116ecf (patch)
tree28ff468681f1689d4abf7478eae575d748d04bfa /cpu
parent2cd95a25cb0ee8218b271d23d64fb3f719ac5390 (diff)
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ppc4xx: Consolidate 4xx PCIe board specific configuration
This patch consolidates the PPC4xx board specific PCIe configuration code. This way the duplicated code is removed. Boards can implement a special, non standard behaviour (e.g. number of PCIe slots, etc) by overriding the weak default functions. Signed-off-by: Stefan Roese <sr@denx.de>
Diffstat (limited to 'cpu')
-rw-r--r--cpu/ppc4xx/4xx_pcie.c123
1 files changed, 123 insertions, 0 deletions
diff --git a/cpu/ppc4xx/4xx_pcie.c b/cpu/ppc4xx/4xx_pcie.c
index 19d2c7d..c4d9cfe 100644
--- a/cpu/ppc4xx/4xx_pcie.c
+++ b/cpu/ppc4xx/4xx_pcie.c
@@ -48,6 +48,129 @@ enum {
LNKW_X8 = 0x8
};
+#if 1 // test-only
+int board_pcie_first(void);
+int board_pcie_last(void);
+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;
+ }
+ }
+}
+#endif
+
static int validate_endpoint(struct pci_controller *hose)
{
if (hose->cfg_data == (u8 *)CONFIG_SYS_PCIE0_CFGBASE)