pci: Add ability to re-enumerate PCI buses

Add a new 'pci enum' command which re-enumerates the PCI buses.  This
command is enabled via the CONFIG_CMD_PCI_ENUM define and can be useful
in boards with FPGAs connected via PCI/PCIe, boards that support PCI
hot-plugging, or during PCI debug.

Also enable the 'pci enum' command for X-ES's Freescale-based boards.

Signed-off-by: John Schmoller <jschmoller@xes-inc.com>
Signed-off-by: Peter Tyser <ptyser@xes-inc.com>
Acked-by: Kumar Gala <galak@kernel.crashing.org>
Acked-by: Wolfgang Denk <wd@denx.de>

diff --git a/common/cmd_pci.c b/common/cmd_pci.c
index 4bde0599118dd805dcc2cf8c0295f90eebb0847a..ccf5adaaad6b13d8cd77e62ed1ea5d5e46ec5e7d 100644 (file)
--- a/common/cmd_pci.c
+++ b/common/cmd_pci.c
@@ -497,6 +497,10 @@ int do_pci (cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
                if ((bdf = get_pci_dev(argv[2])) == -1)
                        return 1;
                break;
+#ifdef CONFIG_CMD_PCI_ENUM
+       case 'e':
+               break;
+#endif
        default:                /* scan bus */
                value = 1; /* short listing */
                bdf = 0;   /* bus number  */
@@ -518,6 +522,11 @@ int do_pci (cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
                return 0;
        case 'd':               /* display */
                return pci_cfg_display(bdf, addr, size, value);
+#ifdef CONFIG_CMD_PCI_ENUM
+       case 'e':
+               pci_init();
+               return 0;
+#endif
        case 'n':               /* next */
                if (argc < 4)
                        goto usage;
@@ -545,6 +554,10 @@ U_BOOT_CMD(
        "list and access PCI Configuration Space",
        "[bus] [long]\n"
        "    - short or long list of PCI devices on bus 'bus'\n"
+#ifdef CONFIG_CMD_PCI_ENUM
+       "pci enum\n"
+       "    - re-enumerate PCI buses\n"
+#endif
        "pci header b.d.f\n"
        "    - show header of PCI device 'bus.device.function'\n"
        "pci display[.b, .w, .l] b.d.f [address] [# of objects]\n"

diff --git a/drivers/pci/fsl_pci_init.c b/drivers/pci/fsl_pci_init.c
index 001e6eb900701185c46f981aa62c1426ff8e7116..1f021036e5f00040b0a2826664e890d2b92fb78b 100644 (file)
--- a/drivers/pci/fsl_pci_init.c
+++ b/drivers/pci/fsl_pci_init.c
@@ -91,6 +91,9 @@ int fsl_setup_hose(struct pci_controller *hose, unsigned long addr)
 {
        volatile ccsr_fsl_pci_t *pci = (ccsr_fsl_pci_t *) addr;
 
+       /* Reset hose to make sure its in a clean state */
+       memset(hose, 0, sizeof(struct pci_controller));
+
        pci_setup_indirect(hose, (u32)&pci->cfg_addr, (u32)&pci->cfg_data);
 
        return fsl_is_pci_agent(hose);

diff --git a/drivers/pci/pci.c b/drivers/pci/pci.c
index cd64a87fc6d9b200ed805ae1e6f5a7e014180435..848746f1ed2ea4b20a7c5ae012aebc2ed9f42a02 100644 (file)
--- a/drivers/pci/pci.c
+++ b/drivers/pci/pci.c
@@ -139,7 +139,7 @@ void *pci_map_bar(pci_dev_t pdev, int bar, int flags)
  *
  */
 
-static struct pci_controller* hose_head = NULL;
+static struct pci_controller* hose_head;
 
 void pci_register_hose(struct pci_controller* hose)
 {
@@ -640,6 +640,8 @@ void pci_init(void)
        }
 #endif /* CONFIG_PCI_BOOTDELAY */
 
+       hose_head = NULL;
+
        /* now call board specific pci_init()... */
        pci_init_board();
 }

diff --git a/include/configs/XPEDITE5170.h b/include/configs/XPEDITE5170.h
index 9ff28a2913264040543c7894d209627d46e0d3c2..ab6d4b4ecb372cd43cbc6665ddd377317c6021dd 100644 (file)
--- a/include/configs/XPEDITE5170.h
+++ b/include/configs/XPEDITE5170.h
@@ -545,6 +545,7 @@ extern unsigned long get_board_sys_clk(unsigned long dummy);
 #define CONFIG_CMD_PCA953X
 #define CONFIG_CMD_PCA953X_INFO
 #define CONFIG_CMD_PCI
+#define CONFIG_CMD_PCI_ENUM
 #define CONFIG_CMD_PING
 #define CONFIG_CMD_REGINFO
 #define CONFIG_CMD_SNTP

diff --git a/include/configs/XPEDITE5200.h b/include/configs/XPEDITE5200.h
index db03777a79dcbf183c3895b514843903d0b67d60..00cd51628125437accb0adcf9fde4e24c7e49629 100644 (file)
--- a/include/configs/XPEDITE5200.h
+++ b/include/configs/XPEDITE5200.h
@@ -339,6 +339,7 @@
 #define CONFIG_CMD_PCA953X
 #define CONFIG_CMD_PCA953X_INFO
 #define CONFIG_CMD_PCI
+#define CONFIG_CMD_PCI_ENUM
 #define CONFIG_CMD_PING
 #define CONFIG_CMD_SNTP
 #define CONFIG_CMD_REGINFO

diff --git a/include/configs/XPEDITE5370.h b/include/configs/XPEDITE5370.h
index 01047c85eee18fc6bdcc7a8113dd9b2fdd9d5c55..73e3d52e8350d21d82c3c634b4353b8525acbe18 100644 (file)
--- a/include/configs/XPEDITE5370.h
+++ b/include/configs/XPEDITE5370.h
@@ -396,6 +396,7 @@ extern unsigned long get_board_ddr_clk(unsigned long dummy);
 #define CONFIG_CMD_PCA953X
 #define CONFIG_CMD_PCA953X_INFO
 #define CONFIG_CMD_PCI
+#define CONFIG_CMD_PCI_ENUM
 #define CONFIG_CMD_PING
 #define CONFIG_CMD_SAVEENV
 #define CONFIG_CMD_SNTP