[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-auto.c

@@ -45,7 +45,7 @@
 #include <linux/types.h>
 #include <linux/pci.h>
 
-#define	DEBUG
+#undef	DEBUG
 #ifdef 	DEBUG
 #define	DBG(x...)	printk(x)
 #else
@@ -106,7 +106,8 @@ static void __init
 pciauto_setup_bars(struct pci_channel *hose,
 		   int top_bus,
 		   int current_bus,
-		   int pci_devfn)
+		   int pci_devfn,
+		   int bar_limit)
 {
 	u32 bar_response, bar_size, bar_value;
 	u32 bar, addr_mask, bar_nr = 0;
@@ -114,7 +115,8 @@ pciauto_setup_bars(struct pci_channel *hose,
 	u32 * lower_limit;
 	int found_mem64 = 0;
 
-	for (bar = PCI_BASE_ADDRESS_0; bar <= PCI_BASE_ADDRESS_5; bar+=4) {
+	for (bar = PCI_BASE_ADDRESS_0; bar <= bar_limit; bar+=4) {
+#if !defined(CONFIG_SH_HS7751RVOIP) && !defined(CONFIG_SH_RTS7751R2D)
 		u32 bar_addr;
 
 		/* Read the old BAR value */
@@ -123,6 +125,7 @@ pciauto_setup_bars(struct pci_channel *hose,
 					pci_devfn,
 					bar,
 					&bar_addr);
+#endif
 
 		/* Tickle the BAR and get the response */
 		early_write_config_dword(hose, top_bus,
@@ -137,6 +140,7 @@ pciauto_setup_bars(struct pci_channel *hose,
 					bar,
 					&bar_response);
 
+#if !defined(CONFIG_SH_HS7751RVOIP) && !defined(CONFIG_SH_RTS7751R2D)
 		/* 
 		 * Write the old BAR value back out, only update the BAR
 		 * if we implicitly want resources to be updated, which
@@ -147,6 +151,7 @@ pciauto_setup_bars(struct pci_channel *hose,
 					 pci_devfn,
 					 bar,
 					 bar_addr);
+#endif
 
 		/* If BAR is not implemented go to the next BAR */
 		if (!bar_response)
@@ -287,6 +292,11 @@ pciauto_postscan_setup_bridge(struct pci_channel *hose,
 {
 	u32 temp;
 
+	/*
+	 * [jsun] we always bump up baselines a little, so that if there
+	 * nothing behind P2P bridge, we don't wind up overlapping IO/MEM
+	 * spaces.
+	 */
 	pciauto_lower_memspc += 1;
 	pciauto_lower_iospc += 1;
 
@@ -352,6 +362,7 @@ pciauto_postscan_setup_cardbus_bridge(struct pci_channel *hose,
 {
 	u32 temp;
 
+#if !defined(CONFIG_SH_HS7751RVOIP) && !defined(CONFIG_SH_RTS7751R2D)
 	/*
 	 * [jsun] we always bump up baselines a little, so that if there
 	 * nothing behind P2P bridge, we don't wind up overlapping IO/MEM
@@ -359,6 +370,7 @@ pciauto_postscan_setup_cardbus_bridge(struct pci_channel *hose,
 	 */
 	pciauto_lower_memspc += 1;
 	pciauto_lower_iospc += 1;
+#endif
 
 	/*
 	 * Configure subordinate bus number.  The PCI subsystem
@@ -384,6 +396,10 @@ pciauto_postscan_setup_cardbus_bridge(struct pci_channel *hose,
 	 * configured by this routine to happily live behind a
 	 * P2P bridge in a system.
 	 */
+#if defined(CONFIG_SH_HS7751RVOIP) || defined(CONFIG_SH_RTS7751R2D)
+	pciauto_lower_memspc += 0x00400000;
+	pciauto_lower_iospc += 0x00004000;
+#endif
 
 	/* Align memory and I/O to 4KB and 4 byte boundaries. */
 	pciauto_lower_memspc = (pciauto_lower_memspc + (0x1000 - 1))
@@ -400,8 +416,8 @@ pciauto_postscan_setup_cardbus_bridge(struct pci_channel *hose,
 	early_read_config_dword(hose, top_bus, current_bus, pci_devfn,
 		PCI_COMMAND, &temp);
 	early_write_config_dword(hose, top_bus, current_bus, pci_devfn,
-               PCI_COMMAND, temp | PCI_COMMAND_IO | PCI_COMMAND_MEMORY
-               | PCI_COMMAND_MASTER);
+		PCI_COMMAND, temp | PCI_COMMAND_IO | PCI_COMMAND_MEMORY |
+		PCI_COMMAND_MASTER);
 }
 
 #define	PCIAUTO_IDE_MODE_MASK		0x05
@@ -455,6 +471,9 @@ pciauto_bus_scan(struct pci_channel *hose, int top_bus, int current_bus)
 		if ((pci_class >> 16) == PCI_CLASS_BRIDGE_PCI) {
 			DBG("        Bridge: primary=%.2x, secondary=%.2x\n",
 				current_bus, sub_bus + 1);
+#if defined(CONFIG_SH_HS7751RVOIP) || defined(CONFIG_SH_RTS7751R2D)
+			pciauto_setup_bars(hose, top_bus, current_bus, pci_devfn, PCI_BASE_ADDRESS_1);
+#endif
 			pciauto_prescan_setup_bridge(hose, top_bus, current_bus,
 						     pci_devfn, sub_bus);
 			DBG("Scanning sub bus %.2x, I/O 0x%.8x, Mem 0x%.8x\n",
@@ -470,7 +489,7 @@ pciauto_bus_scan(struct pci_channel *hose, int top_bus, int current_bus)
 				current_bus, sub_bus + 1);
 			DBG("PCI Autoconfig: Found CardBus bridge, device %d function %d\n", PCI_SLOT(pci_devfn), PCI_FUNC(pci_devfn));
 			/* Place CardBus Socket/ExCA registers */
-                        pciauto_setup_bars(hose, top_bus, current_bus, pci_devfn);
+			pciauto_setup_bars(hose, top_bus, current_bus, pci_devfn, PCI_BASE_ADDRESS_0);
  
 			pciauto_prescan_setup_cardbus_bridge(hose, top_bus,
 					current_bus, pci_devfn, sub_bus);
@@ -509,7 +528,7 @@ pciauto_bus_scan(struct pci_channel *hose, int top_bus, int current_bus)
 					PCI_LATENCY_TIMER, 0x80);
 
 		/* Allocate PCI I/O and/or memory space */
-		pciauto_setup_bars(hose, top_bus, current_bus, pci_devfn);
+		pciauto_setup_bars(hose, top_bus, current_bus, pci_devfn, PCI_BASE_ADDRESS_5);
 	}
 	return sub_bus;
 }

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 }
 };
 
@@ -261,11 +266,11 @@ 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
+	if (!(map->flags & SH7751_PCIC_NO_RESET)) {
 		/* toggle PCI reset pin */
 		word = SH7751_PCICR_PREFIX | SH7751_PCICR_PRST;
 		outl(word,PCI_REG(SH7751_PCICR));
@@ -273,7 +278,7 @@ int __init sh7751_pcic_init(struct sh7751_pci_address_map *map)
 		mdelay(100);
 		word = SH7751_PCICR_PREFIX;
 		outl(word,PCI_REG(SH7751_PCICR));
-#endif
+	}
 	
 	/* 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;
 	}