[PATCH] sh: PCI updates

From: Paul Mundt <lethal@Linux-SH.ORG>

This updates the pci-auto code, as well as adding ops and fixups for the
RTS7751R2D board.
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

arch/sh/drivers/pci/Makefile

@@ -12,4 +12,5 @@ obj-$(CONFIG_SH_DREAMCAST)		+= ops-dreamcast.o fixups-dreamcast.o \
 					   dma-dreamcast.o
 obj-$(CONFIG_SH_SECUREEDGE5410)		+= ops-snapgear.o
 obj-$(CONFIG_SH_BIGSUR)			+= ops-bigsur.o
+obj-$(CONFIG_SH_RTS7751R2D)		+= ops-rts7751r2d.o fixups-rts7751r2d.o
 

arch/sh/drivers/pci/fixups-rts7751r2d.c

+/*
+ * arch/sh/drivers/pci/fixups-rts7751r2d.c
+ *
+ * RTS7751R2D PCI fixups
+ *
+ * Copyright (C) 2003  Lineo uSolutions, Inc.
+ * Copyright (C) 2004  Paul Mundt
+ *
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License.  See the file "COPYING" in the main directory of this archive
+ * for more details.
+ */
+#include "pci-sh7751.h"
+#include <asm/io.h>
+
+#define PCIMCR_MRSET_OFF	0xBFFFFFFF
+#define PCIMCR_RFSH_OFF		0xFFFFFFFB
+
+int pci_fixup_pcic(void)
+{
+	unsigned long mcr;
+
+	outl(0xfb900047, SH7751_PCICONF1);
+	outl(0xab000001, SH7751_PCICONF4);
+
+	mcr = inl(SH7751_MCR);
+	mcr = (mcr & PCIMCR_MRSET_OFF) & PCIMCR_RFSH_OFF;
+	outl(mcr, SH7751_PCIMCR);
+
+	return 0;
+}
+

arch/sh/drivers/pci/ops-rts7751r2d.c

+/*
+ * linux/arch/sh/kernel/pci-rts7751r2d.c
+ *
+ * Author:  Ian DaSilva (idasilva@mvista.com)
+ *
+ * Highly leveraged from pci-bigsur.c, written by Dustin McIntire.
+ *
+ * May be copied or modified under the terms of the GNU General Public
+ * License.  See linux/COPYING for more information.
+ *
+ * PCI initialization for the Renesas SH7751R RTS7751R2D board
+ */
+
+#include <linux/config.h>
+#include <linux/kernel.h>
+#include <linux/types.h>
+#include <linux/init.h>
+#include <linux/delay.h>
+#include <linux/pci.h>
+#include <linux/module.h>
+
+#include <asm/io.h>
+#include "pci-sh7751.h"
+#include <asm/rts7751r2d/rts7751r2d.h>
+
+int __init pcibios_map_platform_irq(u8 slot, u8 pin)
+{
+        switch (slot) {
+	case 0: return IRQ_PCISLOT1;	/* PCI Extend slot #1 */
+	case 1: return IRQ_PCISLOT2;	/* PCI Extend slot #2 */
+	case 2: return IRQ_PCMCIA;	/* PCI Cardbus Bridge */
+	case 3: return IRQ_PCIETH;	/* Realtek Ethernet controller */
+	default:
+		printk("PCI: Bad IRQ mapping request for slot %d\n", slot);
+		return -1;
+	}
+}
+
+static struct resource sh7751_io_resource = {
+	.name	= "SH7751_IO",
+	.start	= 0x4000,
+	.end	= 0x4000 + SH7751_PCI_IO_SIZE - 1,
+	.flags	= IORESOURCE_IO
+};
+
+static struct resource sh7751_mem_resource = {
+	.name	= "SH7751_mem",
+	.start	= SH7751_PCI_MEMORY_BASE,
+	.end	= SH7751_PCI_MEMORY_BASE + SH7751_PCI_MEM_SIZE - 1,
+	.flags	= IORESOURCE_MEM
+};
+
+extern struct pci_ops sh7751_pci_ops;
+
+struct pci_channel board_pci_channels[] = {
+	{ &sh7751_pci_ops, &sh7751_io_resource, &sh7751_mem_resource, 0, 0xff },
+	{ NULL, NULL, NULL, 0, 0 },
+};
+EXPORT_SYMBOL(board_pci_channels);
+
+static struct sh7751_pci_address_map sh7751_pci_map = {
+	.window0	= {
+		.base	= SH7751_CS3_BASE_ADDR,
+		.size	= 0x03f00000,
+	},
+
+	.flags	= SH7751_PCIC_NO_RESET,
+};
+
+int __init pcibios_init_platform(void)
+{
+	return sh7751_pcic_init(&sh7751_pci_map);
+}
+

arch/sh/drivers/pci/ops-snapgear.c

@@ -61,6 +61,8 @@ static struct sh7751_pci_address_map sh7751_pci_map = {
 		.base	= SH7751_CS2_BASE_ADDR,
 		.size	= SNAPGEAR_LSR1_SIZE,
 	},
+
+	.flags	= SH7751_PCIC_NO_RESET,
 };
 
 /*

arch/sh/drivers/pci/pci-sh7751.c

@@ -31,6 +31,7 @@
 #include "pci-sh7751.h"
 
 static unsigned int pci_probe = PCI_PROBE_CONF1;
+extern int pci_fixup_pcic(void);
 
 /*
  * Direct access to PCI hardware...
@@ -74,7 +75,8 @@ static int sh7751_pci_read(struct pci_bus *bus, unsigned int devfn,
 }
 
 /* 
- * Since SH7751 only does 32bit access we'll have to do a read,mask,write operation.  
+ * Since SH7751 only does 32bit access we'll have to do a read,
+ * mask,write operation.
  * We'll allow an odd byte offset, though it should be illegal.
  */ 
 static int sh7751_pci_write(struct pci_bus *bus, unsigned int devfn,
@@ -156,6 +158,7 @@ static int __init pci_check_direct(void)
  *  Handle bus scanning and fixups ....
  */
 
+#if !defined(CONFIG_SH_HS7751RVOIP) && !defined(CONFIG_SH_RTS7751R2D)
 static void __init pci_fixup_ide_bases(struct pci_dev *d)
 {
 	int i;
@@ -174,11 +177,13 @@ static void __init pci_fixup_ide_bases(struct pci_dev *d)
 		}
 	}
 }
-
+#endif
 
 /* Add future fixups here... */
 struct pci_fixup pcibios_fixups[] = {
+#if !defined(CONFIG_SH_HS7751RVOIP) && !defined(CONFIG_SH_RTS7751R2D)
 	{ PCI_FIXUP_HEADER,	PCI_ANY_ID,	PCI_ANY_ID,	pci_fixup_ide_bases },
+#endif
 	{ 0 }
 };
 
@@ -261,19 +266,19 @@ int __init sh7751_pcic_init(struct sh7751_pci_address_map *map)
 	outl(word, PCI_REG(SH7751_PCICLKR));
 
 	/*
-	 * XXX: This code is unused for the SnapGear boards as it is done in
-	 * the bootloader and doing it here means the MAC addresses loaded by
-	 * the bootloader get lost.
+	 * This code is unused for some boards as it is done in the
+	 * bootloader and doing it here means the MAC addresses loaded
+	 * by the bootloader get lost.
 	 */
-#ifndef CONFIG_SH_SECUREEDGE5410
-	/* toggle PCI reset pin */
-	word = SH7751_PCICR_PREFIX | SH7751_PCICR_PRST;
-	outl(word,PCI_REG(SH7751_PCICR));    
-	/* Wait for a long time... not 1 sec. but long enough */
-	mdelay(100);
-	word = SH7751_PCICR_PREFIX;
-	outl(word,PCI_REG(SH7751_PCICR)); 
-#endif
+	if (!(map->flags & SH7751_PCIC_NO_RESET)) {
+		/* toggle PCI reset pin */
+		word = SH7751_PCICR_PREFIX | SH7751_PCICR_PRST;
+		outl(word,PCI_REG(SH7751_PCICR));
+		/* Wait for a long time... not 1 sec. but long enough */
+		mdelay(100);
+		word = SH7751_PCICR_PREFIX;
+		outl(word,PCI_REG(SH7751_PCICR));
+	}
 	
 	/* set the command/status bits to:
 	 * Wait Cycle Control + Parity Enable + Bus Master +
@@ -364,6 +369,10 @@ int __init sh7751_pcic_init(struct sh7751_pci_address_map *map)
 	 * DMA interrupts...
 	 */
 	 
+#ifdef CONFIG_SH_RTS7751R2D
+	pci_fixup_pcic();
+#endif
+
 	/* SH7751 init done, set central function init complete */
 	/* use round robin mode to stop a device starving/overruning */
 	word = SH7751_PCICR_PREFIX | SH7751_PCICR_CFIN | SH7751_PCICR_ARBM;

arch/sh/drivers/pci/pci-sh7751.h

@@ -234,6 +234,7 @@
 #define SH7751_PCIWCR2             0x1EC         /* Wait Control 2 Register */
 #define SH7751_PCIWCR3             0x1F0         /* Wait Control 3 Register */
 #define SH7751_PCIMCR              0x1F4         /* Memory Control Register */
+#define SH7751_PCIBCR3		   0x1f8	 /* Memory BCR3 Register */
 #define SH7751_PCIPCTR             0x200         /* Port Control Register */
   #define SH7751_PCIPCTR_P2EN        0x000400000 /* Port 2 Enable */
   #define SH7751_PCIPCTR_P1EN        0x000200000 /* Port 1 Enable */
@@ -256,6 +257,8 @@
 /* Memory Control Registers */
 #define SH7751_BCR1                0xFF800000    /* Memory BCR1 Register */
 #define SH7751_BCR2                0xFF800004    /* Memory BCR2 Register */
+#define SH7751_BCR3                0xFF800050    /* Memory BCR3 Register */
+#define SH7751_BCR4                0xFE0A00F0    /* Memory BCR4 Register */
 #define SH7751_WCR1                0xFF800008    /* Wait Control 1 Register */
 #define SH7751_WCR2                0xFF80000C    /* Wait Control 2 Register */
 #define SH7751_WCR3                0xFF800010    /* Wait Control 3 Register */
@@ -274,6 +277,9 @@
 /* General PCI values */
 #define SH7751_PCI_HOST_BRIDGE		0x6
 
+/* Flags */
+#define SH7751_PCIC_NO_RESET	0x0001
+
 /* External functions defined per platform i.e. Big Sur, SE... (these could be routed 
  * through the machine vectors... */
 extern int pcibios_init_platform(void);
@@ -287,6 +293,7 @@ struct sh7751_pci_address_space {
 struct sh7751_pci_address_map {
 	struct sh7751_pci_address_space window0;
 	struct sh7751_pci_address_space window1;
+	unsigned long flags;
 };
 
 /* arch/sh/drivers/pci/pci-sh7751.c */

arch/sh/drivers/pci/pci.c

@@ -25,7 +25,7 @@ static int __init pcibios_init(void)
 
 #ifdef CONFIG_PCI_AUTO
 	/* assign resources */
-	busno=0;
+	busno = 0;
 	for (p = board_pci_channels; p->pci_ops != NULL; p++) {
 		busno = pciauto_assign_resources(busno, p) + 1;
 	}