Add support for PCI-Express on PPC440SPe (Yucca board).

1 files changed, 128 insertions, 2 deletions

diff --git a/board/amcc/yucca/yucca.c b/board/amcc/yucca/yucca.c
index 1ae3a54..a6589ec 100644
--- a/board/amcc/yucca/yucca.c
+++ b/board/amcc/yucca/yucca.c
@@ -21,12 +21,16 @@
  * MA 02111-1307 USA
  *
  * Port to AMCC-440SPE Evaluation Board SOP - April 2005
+ *
+ * PCIe supporting routines derived from Linux 440SPe PCIe driver.
  */
 
 #include <common.h>
 #include <ppc4xx.h>
 #include <asm/processor.h>
 #include <i2c.h>
+#include <asm-ppc/io.h>
+
 #include "yucca.h"
 
 void fpga_init (void);
@@ -39,6 +43,9 @@ int get_console_port(void);
 unsigned long ppcMfcpr(unsigned long cpr_reg);
 unsigned long ppcMfsdr(unsigned long sdr_reg);
 
+int ppc440spe_init_pcie_rootport(int port);
+void ppc440spe_setup_pcie(struct pci_controller *hose, int port);
+
 #define DEBUG_ENV
 #ifdef DEBUG_ENV
 #define DEBUGF(fmt,args...) printf(fmt ,##args)
@@ -908,6 +915,7 @@ void pci_target_init(struct pci_controller * hose )
 }
 #endif	/* defined(CONFIG_PCI) && defined(CFG_PCI_TARGET_INIT) */
 
+#if defined(CONFIG_PCI)
 /*************************************************************************
  *  is_pci_host
  *
@@ -923,12 +931,131 @@ void pci_target_init(struct pci_controller * hose )
  *
  *
  ************************************************************************/
-#if defined(CONFIG_PCI)
 int is_pci_host(struct pci_controller *hose)
 {
 	/* The yucca board is always configured as host. */
 	return 1;
 }
+
+
+int yucca_pcie_card_present(int port)
+{
+	u16 reg;
+
+	reg = in_be16((u16 *)FPGA_REG1C);
+	switch(port) {
+	case 0:
+		return !(reg & FPGA_REG1C_PE0_PRSNT);
+	case 1:
+		return !(reg & FPGA_REG1C_PE1_PRSNT);
+	case 2:
+		return !(reg & FPGA_REG1C_PE2_PRSNT);
+	default:
+		return 0;
+	}
+}
+
+/*
+ * For the given slot, set rootpoint mode, send power to the slot,
+ * turn on the green LED and turn off the yellow LED, enable the clock
+ * and turn off reset.
+ */
+void yucca_setup_pcie_fpga_rootpoint(int port)
+{
+	u16 power, clock, green_led, yellow_led, reset_off, rootpoint, endpoint;
+
+	switch(port) {
+	case 0:
+		rootpoint   = FPGA_REG1C_PE0_ROOTPOINT;
+		endpoint    = 0;
+		power 	    = FPGA_REG1A_PE0_PWRON;
+		green_led   = FPGA_REG1A_PE0_GLED;
+		clock 	    = FPGA_REG1A_PE0_REFCLK_ENABLE;
+		yellow_led  = FPGA_REG1A_PE0_YLED;
+		reset_off   = FPGA_REG1C_PE0_PERST;
+		break;
+	case 1:
+		rootpoint   = 0;
+		endpoint    = FPGA_REG1C_PE1_ENDPOINT;
+		power 	    = FPGA_REG1A_PE1_PWRON;
+		green_led   = FPGA_REG1A_PE1_GLED;
+		clock 	    = FPGA_REG1A_PE1_REFCLK_ENABLE;
+		yellow_led  = FPGA_REG1A_PE1_YLED;
+		reset_off   = FPGA_REG1C_PE1_PERST;
+		break;
+	case 2:
+		rootpoint   = 0;
+		endpoint    = FPGA_REG1C_PE2_ENDPOINT;
+		power 	    = FPGA_REG1A_PE2_PWRON;
+		green_led   = FPGA_REG1A_PE2_GLED;
+		clock 	    = FPGA_REG1A_PE2_REFCLK_ENABLE;
+		yellow_led  = FPGA_REG1A_PE2_YLED;
+		reset_off   = FPGA_REG1C_PE2_PERST;
+		break;
+
+	default:
+		return;
+	}
+
+	out_be16((u16 *)FPGA_REG1A,
+		 ~(power | clock | green_led) &
+		 (yellow_led | in_be16((u16 *)FPGA_REG1A)));
+
+	out_be16((u16 *)FPGA_REG1C,
+		 ~(endpoint | reset_off) &
+		 (rootpoint | in_be16((u16 *)FPGA_REG1C)));
+	/*
+	 * Leave device in reset for a while after powering on the
+	 * slot to give it a chance to initialize.
+	 */
+	udelay(250 * 1000);
+
+	out_be16((u16 *)FPGA_REG1C, reset_off | in_be16((u16 *)FPGA_REG1C));
+}
+
+
+static struct pci_controller pcie_hose[3] = {{0},{0},{0}};
+
+void pcie_setup_hoses(void)
+{
+	struct pci_controller *hose;
+	int i, bus;
+
+	/*
+	 * assume we're called after the PCIX hose is initialized, which takes
+	 * bus ID 0 and therefore start numbering PCIe's from 1.
+	 */
+	bus = 1;
+	for (i = 0; i <= 2; i++) {
+		/* Check for yucca card presence */
+		if (!yucca_pcie_card_present(i))
+			continue;
+
+		yucca_setup_pcie_fpga_rootpoint(i);
+		if (ppc440spe_init_pcie_rootport(i)) {
+			printf("PCIE%d: initialization failed\n", i);
+			continue;
+		}
+
+		hose = &pcie_hose[i];
+		hose->first_busno = bus;
+		hose->last_busno  = bus;
+		bus++;
+
+		/* setup mem resource */
+		pci_set_region(hose->regions + 0,
+			CFG_PCIE_MEMBASE + i * CFG_PCIE_MEMSIZE,
+			CFG_PCIE_MEMBASE + i * CFG_PCIE_MEMSIZE,
+			CFG_PCIE_MEMSIZE,
+			PCI_REGION_MEM
+			);
+		hose->region_count = 1;
+		pci_register_hose(hose);
+
+		ppc440spe_setup_pcie(hose, i);
+		hose->last_busno = pci_hose_scan(hose);
+	}
+}
 #endif	/* defined(CONFIG_PCI) */
 
 int misc_init_f (void)
@@ -1094,4 +1221,3 @@ unsigned long ppcMfsdr(unsigned long sdr_reg)
 
 	return (sdr_value);
 }
-