Add PCI support for the TQM834x board.

3 files changed, 241 insertions, 29 deletions

diff --git a/board/tqm834x/Makefile b/board/tqm834x/Makefile
index 4327b0d..3ecc7d0 100644
--- a/board/tqm834x/Makefile
+++ b/board/tqm834x/Makefile
@@ -24,7 +24,7 @@ include $(TOPDIR)/config.mk
 
 LIB	= lib$(BOARD).a
 
-OBJS	:= $(BOARD).o
+OBJS	= $(BOARD).o pci.o
 
 $(LIB):	$(OBJS) $(SOBJS)
 	$(AR) crv $@ $(OBJS)
diff --git a/board/tqm834x/pci.c b/board/tqm834x/pci.c
new file mode 100644
index 0000000..6111d03
--- /dev/null
+++ b/board/tqm834x/pci.c
@@ -0,0 +1,220 @@
+/*
+ * (C) Copyright 2005
+ * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
+ *
+ * See file CREDITS for list of people who contributed to this
+ * project.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of
+ * the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
+ * MA 02111-1307 USA
+ *
+ */
+
+#include <asm/mmu.h>
+#include <common.h>
+#include <pci.h>
+
+#ifdef CONFIG_PCI
+
+/* System RAM mapped to PCI space */
+#define CONFIG_PCI_SYS_MEM_BUS	CFG_SDRAM_BASE
+#define CONFIG_PCI_SYS_MEM_PHYS	CFG_SDRAM_BASE
+#define CONFIG_PCI_SYS_MEM_SIZE	(1024 * 1024 * 1024)
+
+#ifndef CONFIG_PCI_PNP
+static struct pci_config_table pci_tqm834x_config_table[] = {
+	{PCI_ANY_ID, PCI_ANY_ID, PCI_ANY_ID, PCI_ANY_ID,
+	 PCI_IDSEL_NUMBER, PCI_ANY_ID,
+ 	 pci_cfgfunc_config_device, {PCI_ENET0_IOADDR,
+				     PCI_ENET0_MEMADDR,
+				     PCI_COMMAND_MEMORY | PCI_COMMAND_MASTER
+		}
+	},
+	{}
+};
+#endif
+
+static struct pci_controller pci1_hose = {
+#ifndef CONFIG_PCI_PNP
+	config_table:pci_tqm834x_config_table,
+#endif
+};
+
+
+/**************************************************************************
+ * pci_init_board()
+ *
+ * NOTICE: MPC8349 internally has two PCI controllers (PCI1 and PCI2) but since
+ * per TQM834x design physical connections to external devices (PCI sockets)
+ * are routed only to the PCI1 we do not account for the second one - this code
+ * supports PCI1 module only. Should support for the PCI2 be required in the
+ * future it needs a separate pci_controller structure (above) and handling -
+ * please refer to other boards' implementation for dual PCI host controllers,
+ * for example board/Marvell/db64360/pci.c, pci_init_board()
+ *
+ */
+void
+pci_init_board(void)
+{
+	volatile immap_t *	immr;
+	volatile clk8349_t *	clk;
+	volatile law8349_t *	pci_law;
+	volatile pot8349_t *	pci_pot;
+	volatile pcictrl8349_t *	pci_ctrl;
+	volatile pciconf8349_t *	pci_conf;
+	u16 reg16;
+	u32 reg32;
+	struct	pci_controller * hose;
+
+	immr = (immap_t *)CFG_IMMRBAR;
+	clk = (clk8349_t *)&immr->clk;
+	pci_law = immr->sysconf.pcilaw;
+	pci_pot = immr->ios.pot;
+	pci_ctrl = immr->pci_ctrl;
+	pci_conf = immr->pci_conf;
+
+	hose = &pci1_hose;
+	
+	/*
+	 * Configure PCI controller and PCI_CLK_OUTPUT 
+	 */
+
+	/*
+	 * WARNING! only PCI_CLK_OUTPUT1 is enabled here as this is the one
+	 * line actually used for clocking all external PCI devices in TQM83xx.
+	 * Enabling other PCI_CLK_OUTPUT lines may lead to board's hang for 
+	 * unknown reasons - particularly PCI_CLK_OUTPUT6 and PCI_CLK_OUTPUT7
+	 * are known to hang the board; this issue is under investigation 
+	 * (13 oct 05)
+	 */
+	reg32 = OCCR_PCICOE1;
+#if 0	
+	/* enabling all PCI_CLK_OUTPUT lines HANGS the board... */
+	reg32 = 0xff000000;
+#endif	
+	if (clk->spmr & SPMR_CKID) {
+		/* PCI Clock is half CONFIG_83XX_CLKIN so need to set up OCCR
+		 * fields accordingly */
+		reg32 |= (OCCR_PCI1CR | OCCR_PCI2CR);
+		
+		reg32 |= (OCCR_PCICD0 | OCCR_PCICD1 | OCCR_PCICD2 \
+			  | OCCR_PCICD3 | OCCR_PCICD4 | OCCR_PCICD5 \
+			  | OCCR_PCICD6 | OCCR_PCICD7);
+	}
+
+	clk->occr = reg32;
+	udelay(2000);
+
+	/*
+	 * Release PCI RST Output signal
+	 */
+	pci_ctrl[0].gcr = 0;
+	udelay(2000);
+	pci_ctrl[0].gcr = 1;
+	udelay(2000);
+
+	/*
+	 * Configure PCI Local Access Windows
+	 */
+	pci_law[0].bar = CFG_PCI1_MEM_PHYS & LAWBAR_BAR;
+	pci_law[0].ar = LAWAR_EN | LAWAR_TRGT_IF_PCI1 | LAWAR_SIZE_512M;
+
+	pci_law[1].bar = CFG_PCI1_IO_PHYS & LAWBAR_BAR;
+	pci_law[1].ar = LAWAR_EN | LAWAR_TRGT_IF_PCI1 | LAWAR_SIZE_16M;
+
+	/*
+	 * Configure PCI Outbound Translation Windows
+	 */
+
+	/* PCI1 mem space */ 
+	pci_pot[0].potar = (CFG_PCI1_MEM_BASE >> 12) & POTAR_TA_MASK;
+	pci_pot[0].pobar = (CFG_PCI1_MEM_PHYS >> 12) & POBAR_BA_MASK;
+	pci_pot[0].pocmr = POCMR_EN | (POCMR_CM_512M & POCMR_CM_MASK);
+
+	/* PCI1 IO space */
+	pci_pot[1].potar = (CFG_PCI1_IO_BASE >> 12) & POTAR_TA_MASK;
+	pci_pot[1].pobar = (CFG_PCI1_IO_PHYS >> 12) & POBAR_BA_MASK;
+	pci_pot[1].pocmr = POCMR_EN | POCMR_IO | (POCMR_CM_16M & POCMR_CM_MASK);
+
+	/*
+	 * Configure PCI Inbound Translation Windows
+	 */
+
+	/* we need RAM mapped to PCI space for the devices to 
+	 * access main memory */ 
+	pci_ctrl[0].pitar1 = 0x0;
+	pci_ctrl[0].pibar1 = 0x0;
+	pci_ctrl[0].piebar1 = 0x0;
+	pci_ctrl[0].piwar1 = PIWAR_EN | PIWAR_PF | PIWAR_RTT_SNOOP | PIWAR_IWS_256M;
+
+	hose->first_busno = 0;
+	hose->last_busno = 0xff;
+
+	/* PCI memory space */
+	pci_set_region(hose->regions + 0,
+		       CFG_PCI1_MEM_BASE,
+		       CFG_PCI1_MEM_PHYS,
+		       CFG_PCI1_MEM_SIZE,
+		       PCI_REGION_MEM);
+
+	/* PCI IO space */
+	pci_set_region(hose->regions + 1,
+		       CFG_PCI1_IO_BASE,
+		       CFG_PCI1_IO_PHYS,
+		       CFG_PCI1_IO_SIZE,
+		       PCI_REGION_IO);
+
+	/* System memory space */
+	pci_set_region(hose->regions + 2,
+		       CONFIG_PCI_SYS_MEM_BUS,
+                       CONFIG_PCI_SYS_MEM_PHYS,
+                       CONFIG_PCI_SYS_MEM_SIZE,
+                       PCI_REGION_MEM | PCI_REGION_MEMORY);
+		       
+	hose->region_count = 3;
+
+	pci_setup_indirect(hose,
+			   (CFG_IMMRBAR+0x8300),
+			   (CFG_IMMRBAR+0x8304));
+
+	pci_register_hose(hose);
+
+	/*
+	 * Write to Command register
+	 */
+	reg16 = 0xff;
+	pci_hose_read_config_word (hose, PCI_BDF(0,0,0), PCI_COMMAND, 
+					&reg16);
+	reg16 |= PCI_COMMAND_SERR | PCI_COMMAND_MASTER | PCI_COMMAND_MEMORY;
+	pci_hose_write_config_word(hose, PCI_BDF(0,0,0), PCI_COMMAND, 
+					reg16);
+
+	/*
+	 * Clear non-reserved bits in status register.
+	 */
+	pci_hose_write_config_word(hose, PCI_BDF(0,0,0), PCI_STATUS, 
+					0xffff);
+	pci_hose_write_config_byte(hose, PCI_BDF(0,0,0), PCI_LATENCY_TIMER, 
+					0x80);
+
+#ifdef CONFIG_PCI_SCAN_SHOW
+	printf("PCI:   Bus Dev VenId DevId Class Int\n");
+#endif
+	/*
+	 * Hose scan.
+	 */
+	hose->last_busno = pci_hose_scan(hose);
+}
+#endif /* CONFIG_PCI */
diff --git a/board/tqm834x/tqm834x.c b/board/tqm834x/tqm834x.c
index 9e620eb..f681dc8 100644
--- a/board/tqm834x/tqm834x.c
+++ b/board/tqm834x/tqm834x.c
@@ -30,10 +30,7 @@
 #include <spd.h>
 #include <miiphy.h>
 #include <asm-ppc/mmu.h>
-
-#if defined(CONFIG_PCI)
 #include <pci.h>
-#endif
 
 #define IOSYNC			asm("eieio")
 #define ISYNC			asm("isync")
@@ -145,37 +142,32 @@ int checkboard (void)
 	puts("Board: TQM834x\n");
 
 #ifdef CONFIG_PCI
-	printf("PCI1:  32 bit, %d MHz (compiled)\n",
-			CONFIG_SYS_CLK_FREQ / 1000000);
-#else
-	printf("PCI1:  disabled\n");
-#endif
-
-	return 0;
-}
-
-#if defined(CONFIG_PCI)
-/*
- * Initialize PCI Devices, report devices found
- */
+	DECLARE_GLOBAL_DATA_PTR;
+	volatile immap_t * immr;
+	u32 w, f;
 
-/* FIXME: No PCI support */
+	immr = (immap_t *)CFG_IMMRBAR;
+	if (!(immr->reset.rcwh & RCWH_PCIHOST)) {
+		printf("PCI:   NOT in host mode..?!\n");
+		return 0;
+	}
 
-#endif /* CONFIG_PCI */
+	/* get bus width */
+	w = 32;
+	if (immr->reset.rcwh & RCWH_PCI64) 
+		w = 64;
 
-/**************************************************************************
- * pci_init_board()
- */
-void
-pci_init_board(void)
-{
-#ifdef CONFIG_PCI
-	extern void pci_mpc83xx_init(volatile struct pci_controller *hose);
+	/* get clock */
+	f = gd->pci_clk;
 
-	pci_mpc83xx_init(hose);
-#endif /* CONFIG_PCI */
+	printf("PCI1:  %d bit, %d MHz\n", w, f / 1000000);
+#else
+	printf("PCI:   disabled\n");
+#endif
+	return 0;
 }
 
+
 /**************************************************************************
  *
  * Local functions