IXP42x PCI rewrite

clean up IXP PCI handling: get rid of IXP-private bus scan, BAR assign etc.
code and use u-boot's PCI infrastructure instead.  Move board-specific PCI
setup code (clock/reset) to board directory.

Signed-off-by: Michael Schwingen <michael@schwingen.org>

3 files changed, 206 insertions, 423 deletions

diff --git a/drivers/pci/pci.c b/drivers/pci/pci.c
index cdfc4fb..1a0b14c 100644
--- a/drivers/pci/pci.c
+++ b/drivers/pci/pci.c
@@ -50,7 +50,6 @@ PCI_HOSE_OP(write, byte, u8)
 PCI_HOSE_OP(write, word, u16)
 PCI_HOSE_OP(write, dword, u32)
 
-#ifndef CONFIG_IXP425
 #define PCI_OP(rw, size, type, error_code)				\
 int pci_##rw##_config_##size(pci_dev_t dev, int offset, type value)	\
 {									\
@@ -71,7 +70,6 @@ PCI_OP(read, dword, u32 *, *value = 0xffffffff)
 PCI_OP(write, byte, u8, )
 PCI_OP(write, word, u16, )
 PCI_OP(write, dword, u32, )
-#endif	/* CONFIG_IXP425 */
 
 #define PCI_READ_VIA_DWORD_OP(size, type, off_mask)			\
 int pci_hose_read_config_##size##_via_dword(struct pci_controller *hose,\
@@ -190,7 +188,6 @@ int pci_last_busno(void)
 	return hose->last_busno;
 }
 
-#ifndef CONFIG_IXP425
 pci_dev_t pci_find_devices(struct pci_device_id *ids, int index)
 {
 	struct pci_controller * hose;
@@ -246,7 +243,6 @@ pci_dev_t pci_find_devices(struct pci_device_id *ids, int index)
 
 	return (-1);
 }
-#endif	/* CONFIG_IXP425 */
 
 pci_dev_t pci_find_device(unsigned int vendor, unsigned int device, int index)
 {
diff --git a/drivers/pci/pci_indirect.c b/drivers/pci/pci_indirect.c
index 2070d01..526a55c 100644
--- a/drivers/pci/pci_indirect.c
+++ b/drivers/pci/pci_indirect.c
@@ -11,7 +11,7 @@
 
 #include <common.h>
 
-#if (!defined(__I386__) && !defined(CONFIG_IXDP425))
+#if !defined(__I386__)
 
 #include <asm/processor.h>
 #include <asm/io.h>
@@ -20,15 +20,6 @@
 #define cfg_read(val, addr, type, op)	*val = op((type)(addr))
 #define cfg_write(val, addr, type, op)	op((type *)(addr), (val))
 
-#ifdef CONFIG_IXP425
-extern unsigned char	in_8 (volatile unsigned *addr);
-extern unsigned short	in_le16 (volatile unsigned *addr);
-extern unsigned		in_le32 (volatile unsigned *addr);
-extern void		out_8 (volatile unsigned *addr, char val);
-extern void		out_le16 (volatile unsigned *addr, unsigned short val);
-extern void		out_le32 (volatile unsigned *addr, unsigned int val);
-#endif	/* CONFIG_IXP425 */
-
 #if defined(CONFIG_MPC8260)
 #define INDIRECT_PCI_OP(rw, size, type, op, mask)			 \
 static int								 \
@@ -134,4 +125,4 @@ void pci_setup_indirect(struct pci_controller* hose, u32 cfg_addr, u32 cfg_data)
 	hose->cfg_data = (unsigned char *) cfg_data;
 }
 
-#endif	/* !__I386__ && !CONFIG_IXDP425 */
+#endif	/* !__I386__ */
diff --git a/drivers/pci/pci_ixp.c b/drivers/pci/pci_ixp.c
index 3b303b4..5b5c915 100644
--- a/drivers/pci/pci_ixp.c
+++ b/drivers/pci/pci_ixp.c
@@ -1,5 +1,8 @@
 /*
  * IXP PCI Init
+ *
+ * (C) Copyright 2011
+ * Michael Schwingen, michael@schwingen.org
  * (C) Copyright 2004 eslab.whut.edu.cn
  * Yue Hu(huyue_whut@yahoo.com.cn), Ligong Xue(lgxue@hotmail.com)
  *
@@ -22,7 +25,6 @@
  * MA 02111-1307 USA
  */
 
-
 #include <common.h>
 #include <asm/processor.h>
 #include <asm/io.h>
@@ -30,542 +32,336 @@
 #include <asm/arch/ixp425.h>
 #include <asm/arch/ixp425pci.h>
 
-static void non_prefetch_read (unsigned int addr, unsigned int cmd,
-			       unsigned int *data);
-static void non_prefetch_write (unsigned int addr, unsigned int cmd,
-				unsigned int data);
-static void configure_pins (void);
-static void sys_pci_gpio_clock_config (void);
-static void pci_bus_scan (void);
-static int pci_device_exists (unsigned int deviceNo);
-static void sys_pci_bar_info_get (unsigned int devnum, unsigned int bus,
-				  unsigned int dev, unsigned int func);
-static void sys_pci_device_bars_write (void);
-static void calc_bars (PciBar * Bars[], unsigned int nBars,
-		       unsigned int startAddr);
+DECLARE_GLOBAL_DATA_PTR;
+
+static void non_prefetch_read(unsigned int addr, unsigned int cmd,
+			      unsigned int *data);
+static void non_prefetch_write(unsigned int addr, unsigned int cmd,
+			       unsigned int data);
+
+/*define the sub vendor and subsystem to be used */
+#define IXP425_PCI_SUB_VENDOR_SYSTEM 0x00000000
 
 #define PCI_MEMORY_BUS		0x00000000
-#define PCI_MEMORY_PHY		0x48000000
+#define PCI_MEMORY_PHY		0x00000000
 #define PCI_MEMORY_SIZE		0x04000000
 
-#define PCI_MEM_BUS		0x40000000
+#define PCI_MEM_BUS		0x48000000
 #define PCI_MEM_PHY		0x00000000
 #define PCI_MEM_SIZE		0x04000000
 
-#define	PCI_IO_BUS		0x40000000
-#define PCI_IO_PHY		0x50000000
-#define PCI_IO_SIZE		0x10000000
+#define	PCI_IO_BUS		0x00000000
+#define PCI_IO_PHY		0x00000000
+#define PCI_IO_SIZE		0x00010000
+
+/* build address value for config sycle */
+static unsigned int pci_config_addr(pci_dev_t bdf, unsigned int reg)
+{
+	unsigned int bus = PCI_BUS(bdf);
+	unsigned int dev = PCI_DEV(bdf);
+	unsigned int func = PCI_FUNC(bdf);
+	unsigned int addr;
+
+	if (bus) { /* secondary bus, use type 1 config cycle */
+		addr = bdf | (reg & ~3) | 1;
+	} else {
+		/*
+		  primary bus, type 0 config cycle. address bits 31:28
+		  specify the device 10:8 specify the function
+		*/
+		addr = BIT((31 - dev)) | (func << 8) | (reg & ~3);
+	}
+
+	return addr;
+}
+
+static int pci_config_status(void)
+{
+	unsigned int regval;
 
-struct pci_controller hose;
+	regval = readl(PCI_CSR_BASE + PCI_ISR_OFFSET);
+	if ((regval & PCI_ISR_PFE) == 0)
+		return OK;
 
-unsigned int nDevices;
-unsigned int nMBars;
-unsigned int nIOBars;
-PciBar *memBars[IXP425_PCI_MAX_BAR];
-PciBar *ioBars[IXP425_PCI_MAX_BAR];
-PciDevice devices[IXP425_PCI_MAX_FUNC_ON_BUS];
+	/* no device present, make sure that the master abort bit is reset */
+	writel(PCI_ISR_PFE, PCI_CSR_BASE + PCI_ISR_OFFSET);
+	return ERROR;
+}
 
-int pci_read_config_dword (pci_dev_t dev, int where, unsigned int *val)
+static int pci_ixp_hose_read_config_dword(struct pci_controller *hose,
+				   pci_dev_t bdf, int where, unsigned int *val)
 {
 	unsigned int retval;
 	unsigned int addr;
+	int stat;
 
-	/*address bits 31:28 specify the device 10:8 specify the function */
+	debug("pci_ixp_hose_read_config_dword: bdf %x, reg %x", bdf, where);
 	/*Set the address to be read */
-	addr = BIT ((31 - dev)) | (where & ~3);
-	non_prefetch_read (addr, NP_CMD_CONFIGREAD, &retval);
-
+	addr = pci_config_addr(bdf, where);
+	non_prefetch_read(addr, NP_CMD_CONFIGREAD, &retval);
 	*val = retval;
 
-	return (OK);
+	stat = pci_config_status();
+	if (stat < 0)
+		*val = -1;
+	debug("-> val %x, status %x\n", *val, stat);
+	return stat;
 }
 
-int pci_read_config_word (pci_dev_t dev, int where, unsigned short *val)
+static int pci_ixp_hose_read_config_word(struct pci_controller *hose,
+				  pci_dev_t bdf, int where, unsigned short *val)
 {
 	unsigned int n;
 	unsigned int retval;
 	unsigned int addr;
 	unsigned int byteEnables;
+	int stat;
 
+	debug("pci_ixp_hose_read_config_word: bdf %x, reg %x", bdf, where);
 	n = where % 4;
 	/*byte enables are 4 bits active low, the position of each
 	   bit maps to the byte that it enables */
 	byteEnables =
-		(~(BIT (n) | BIT ((n + 1)))) &
+		(~(BIT(n) | BIT((n + 1)))) &
 		IXP425_PCI_BOTTOM_NIBBLE_OF_LONG_MASK;
 	byteEnables = byteEnables << PCI_NP_CBE_BESL;
-	/*address bits 31:28 specify the device 10:8 specify the function */
 	/*Set the address to be read */
-	addr = BIT ((31 - dev)) | (where & ~3);
-	non_prefetch_read (addr, byteEnables | NP_CMD_CONFIGREAD, &retval);
+	addr = pci_config_addr(bdf, where);
+	non_prefetch_read(addr, byteEnables | NP_CMD_CONFIGREAD, &retval);
 
 	/*Pick out the word we are interested in */
-	*val = (retval >> (8 * n));
+	*val = retval >> (8 * n);
 
-	return (OK);
+	stat = pci_config_status();
+	if (stat < 0)
+		*val = -1;
+	debug("-> val %x, status %x\n", *val, stat);
+	return stat;
 }
 
-int pci_read_config_byte (pci_dev_t dev, int where, unsigned char *val)
+static int pci_ixp_hose_read_config_byte(struct pci_controller *hose,
+				  pci_dev_t bdf, int where, unsigned char *val)
 {
 	unsigned int retval;
 	unsigned int n;
 	unsigned int byteEnables;
 	unsigned int addr;
+	int stat;
 
+	debug("pci_ixp_hose_read_config_byte: bdf %x, reg %x", bdf, where);
 	n = where % 4;
 	/*byte enables are 4 bits, active low, the position of each
 	   bit maps to the byte that it enables */
-	byteEnables = (~BIT (n)) & IXP425_PCI_BOTTOM_NIBBLE_OF_LONG_MASK;
+	byteEnables = (~BIT(n)) & IXP425_PCI_BOTTOM_NIBBLE_OF_LONG_MASK;
 	byteEnables = byteEnables << PCI_NP_CBE_BESL;
 
-	/*address bits 31:28 specify the device, 10:8 specify the function */
 	/*Set the address to be read */
-	addr = BIT ((31 - dev)) | (where & ~3);
-	non_prefetch_read (addr, byteEnables | NP_CMD_CONFIGREAD, &retval);
+	addr = pci_config_addr(bdf, where);
+	non_prefetch_read(addr, byteEnables | NP_CMD_CONFIGREAD, &retval);
 	/*Pick out the byte we are interested in */
-	*val = (retval >> (8 * n));
+	*val = retval >> (8 * n);
 
-	return (OK);
+	stat = pci_config_status();
+	if (stat < 0)
+		*val = -1;
+	debug("-> val %x, status %x\n", *val, stat);
+	return stat;
 }
 
-int pci_write_config_byte (pci_dev_t dev, int where, unsigned char val)
+static int pci_ixp_hose_write_config_byte(struct pci_controller *hose,
+				   pci_dev_t bdf, int where, unsigned char val)
 {
 	unsigned int addr;
 	unsigned int byteEnables;
 	unsigned int n;
 	unsigned int ldata;
+	int stat;
 
+	debug("pci_ixp_hose_write_config_byte: bdf %x, reg %x, val %x",
+	      bdf, where, val);
 	n = where % 4;
 	/*byte enables are 4 bits active low, the position of each
 	   bit maps to the byte that it enables */
-	byteEnables = (~BIT (n)) & IXP425_PCI_BOTTOM_NIBBLE_OF_LONG_MASK;
+	byteEnables = (~BIT(n)) & IXP425_PCI_BOTTOM_NIBBLE_OF_LONG_MASK;
 	byteEnables = byteEnables << PCI_NP_CBE_BESL;
 	ldata = val << (8 * n);
-	/*address bits 31:28 specify the device 10:8 specify the function */
 	/*Set the address to be written */
-	addr = BIT ((31 - dev)) | (where & ~3);
-	non_prefetch_write (addr, byteEnables | NP_CMD_CONFIGWRITE, ldata);
+	addr = pci_config_addr(bdf, where);
+	non_prefetch_write(addr, byteEnables | NP_CMD_CONFIGWRITE, ldata);
 
-	return (OK);
+	stat = pci_config_status();
+	debug("-> status %x\n", stat);
+	return stat;
 }
 
-int pci_write_config_word (pci_dev_t dev, int where, unsigned short val)
+static int pci_ixp_hose_write_config_word(struct pci_controller *hose,
+				   pci_dev_t bdf, int where, unsigned short val)
 {
 	unsigned int addr;
 	unsigned int byteEnables;
 	unsigned int n;
 	unsigned int ldata;
+	int stat;
 
+	debug("pci_ixp_hose_write_config_word: bdf %x, reg %x, val %x",
+	      bdf, where, val);
 	n = where % 4;
 	/*byte enables are 4 bits active low, the position of each
 	   bit maps to the byte that it enables */
 	byteEnables =
-		(~(BIT (n) | BIT ((n + 1)))) &
+		(~(BIT(n) | BIT((n + 1)))) &
 		IXP425_PCI_BOTTOM_NIBBLE_OF_LONG_MASK;
 	byteEnables = byteEnables << PCI_NP_CBE_BESL;
 	ldata = val << (8 * n);
-	/*address bits 31:28 specify the device 10:8 specify the function */
 	/*Set the address to be written */
-	addr = BIT (31 - dev) | (where & ~3);
-	non_prefetch_write (addr, byteEnables | NP_CMD_CONFIGWRITE, ldata);
+	addr = pci_config_addr(bdf, where);
+	non_prefetch_write(addr, byteEnables | NP_CMD_CONFIGWRITE, ldata);
 
-	return (OK);
+	stat = pci_config_status();
+	debug("-> status %x\n", stat);
+	return stat;
 }
 
-int pci_write_config_dword (pci_dev_t dev, int where, unsigned int val)
+static int pci_ixp_hose_write_config_dword(struct pci_controller *hose,
+				    pci_dev_t bdf, int where, unsigned int val)
 {
 	unsigned int addr;
+	int stat;
 
-	/*address bits 31:28 specify the device 10:8 specify the function */
+	debug("pci_ixp_hose_write_config_dword: bdf %x, reg %x, val %x",
+	      bdf, where, val);
 	/*Set the address to be written */
-	addr = BIT (31 - dev) | (where & ~3);
-	non_prefetch_write (addr, NP_CMD_CONFIGWRITE, val);
+	addr = pci_config_addr(bdf, where);
+	non_prefetch_write(addr, NP_CMD_CONFIGWRITE, val);
 
-	return (OK);
+	stat = pci_config_status();
+	debug("-> status %x\n", stat);
+	return stat;
 }
 
-void non_prefetch_read (unsigned int addr,
-			unsigned int cmd, unsigned int *data)
+static void non_prefetch_read(unsigned int addr,
+		       unsigned int cmd, unsigned int *data)
 {
-	REG_WRITE (PCI_CSR_BASE, PCI_NP_AD_OFFSET, addr);
+	writel(addr, PCI_CSR_BASE + PCI_NP_AD_OFFSET);
 
 	/*set up and execute the read */
-	REG_WRITE (PCI_CSR_BASE, PCI_NP_CBE_OFFSET, cmd);
+	writel(cmd, PCI_CSR_BASE + PCI_NP_CBE_OFFSET);
 
 	/*The result of the read is now in np_rdata */
-	REG_READ (PCI_CSR_BASE, PCI_NP_RDATA_OFFSET, *data);
+	*data = readl(PCI_CSR_BASE + PCI_NP_RDATA_OFFSET);
 
 	return;
 }
 
-void non_prefetch_write (unsigned int addr,
-			 unsigned int cmd, unsigned int data)
+static void non_prefetch_write(unsigned int addr,
+			unsigned int cmd, unsigned int data)
 {
 
-	REG_WRITE (PCI_CSR_BASE, PCI_NP_AD_OFFSET, addr);
+	writel(addr, PCI_CSR_BASE + PCI_NP_AD_OFFSET);
 	/*set up the write */
-	REG_WRITE (PCI_CSR_BASE, PCI_NP_CBE_OFFSET, cmd);
+	writel(cmd, PCI_CSR_BASE + PCI_NP_CBE_OFFSET);
 	/*Execute the write by writing to NP_WDATA */
-	REG_WRITE (PCI_CSR_BASE, PCI_NP_WDATA_OFFSET, data);
+	writel(data, PCI_CSR_BASE + PCI_NP_WDATA_OFFSET);
 
 	return;
 }
 
-/*
- * PCI controller config registers are accessed through these functions
- * i.e. these allow us to set up our own BARs etc.
- */
-void crp_read (unsigned int offset, unsigned int *data)
+static void crp_write(unsigned int offset, unsigned int data)
 {
-	REG_WRITE (PCI_CSR_BASE, PCI_CRP_AD_CBE_OFFSET, offset);
-	REG_READ (PCI_CSR_BASE, PCI_CRP_RDATA_OFFSET, *data);
-}
-
-void crp_write (unsigned int offset, unsigned int data)
-{
-	/*The CRP address register bit 16 indicates that we want to do a write */
-	REG_WRITE (PCI_CSR_BASE, PCI_CRP_AD_CBE_OFFSET,
-		   PCI_CRP_WRITE | offset);
-	REG_WRITE (PCI_CSR_BASE, PCI_CRP_WDATA_OFFSET, data);
-}
-
-/*struct pci_controller *hose*/
-void pci_ixp_init (struct pci_controller *hose)
-{
-	unsigned int regval;
-
-	hose->first_busno = 0;
-	hose->last_busno = 0x00;
-
-	/* System memory space */
-	pci_set_region (hose->regions + 0,
-			PCI_MEMORY_BUS,
-			PCI_MEMORY_PHY, PCI_MEMORY_SIZE, PCI_REGION_SYS_MEMORY);
-
-	/* PCI memory space */
-	pci_set_region (hose->regions + 1,
-			PCI_MEM_BUS,
-			PCI_MEM_PHY, PCI_MEM_SIZE, PCI_REGION_MEM);
-	/* PCI I/O space */
-	pci_set_region (hose->regions + 2,
-			PCI_IO_BUS, PCI_IO_PHY, PCI_IO_SIZE, PCI_REGION_IO);
-
-	hose->region_count = 3;
-
-	pci_register_hose (hose);
-
-/*
- ==========================================================
-		Init IXP PCI
- ==========================================================
-*/
-	REG_READ (PCI_CSR_BASE, PCI_CSR_OFFSET, regval);
-	regval |= 1 << 2;
-	REG_WRITE (PCI_CSR_BASE, PCI_CSR_OFFSET, regval);
-
-	configure_pins ();
-
-	READ_GPIO_REG (IXP425_GPIO_GPOUTR, regval);
-	WRITE_GPIO_REG (IXP425_GPIO_GPOUTR, regval & (~(1 << 13)));
-	udelay (533);
-	sys_pci_gpio_clock_config ();
-	REG_WRITE (PCI_CSR_BASE, PCI_INTEN_OFFSET, 0);
-	udelay (100);
-	READ_GPIO_REG (IXP425_GPIO_GPOUTR, regval);
-	WRITE_GPIO_REG (IXP425_GPIO_GPOUTR, regval | (1 << 13));
-	udelay (533);
-	crp_write (PCI_CFG_BASE_ADDRESS_0, IXP425_PCI_BAR_0_DEFAULT);
-	crp_write (PCI_CFG_BASE_ADDRESS_1, IXP425_PCI_BAR_1_DEFAULT);
-	crp_write (PCI_CFG_BASE_ADDRESS_2, IXP425_PCI_BAR_2_DEFAULT);
-	crp_write (PCI_CFG_BASE_ADDRESS_3, IXP425_PCI_BAR_3_DEFAULT);
-	crp_write (PCI_CFG_BASE_ADDRESS_4, IXP425_PCI_BAR_4_DEFAULT);
-	crp_write (PCI_CFG_BASE_ADDRESS_5, IXP425_PCI_BAR_5_DEFAULT);
-	/*Setup PCI-AHB and AHB-PCI address mappings */
-	REG_WRITE (PCI_CSR_BASE, PCI_AHBMEMBASE_OFFSET,
-		   IXP425_PCI_AHBMEMBASE_DEFAULT);
-
-	REG_WRITE (PCI_CSR_BASE, PCI_AHBIOBASE_OFFSET,
-		   IXP425_PCI_AHBIOBASE_DEFAULT);
-
-	REG_WRITE (PCI_CSR_BASE, PCI_PCIMEMBASE_OFFSET,
-		   IXP425_PCI_PCIMEMBASE_DEFAULT);
-
-	crp_write (PCI_CFG_SUB_VENDOR_ID, IXP425_PCI_SUB_VENDOR_SYSTEM);
-
-	REG_READ (PCI_CSR_BASE, PCI_CSR_OFFSET, regval);
-	regval |= PCI_CSR_IC | PCI_CSR_ABE | PCI_CSR_PDS;
-	REG_WRITE (PCI_CSR_BASE, PCI_CSR_OFFSET, regval);
-	crp_write (PCI_CFG_COMMAND, PCI_CFG_CMD_MAE | PCI_CFG_CMD_BME);
-	udelay (1000);
-
-	pci_write_config_word (0, PCI_CFG_COMMAND, INITIAL_PCI_CMD);
-	REG_WRITE (PCI_CSR_BASE, PCI_ISR_OFFSET, PCI_ISR_PSE
-		   | PCI_ISR_PFE | PCI_ISR_PPE | PCI_ISR_AHBE);
-#ifdef CONFIG_PCI_SCAN_SHOW
-	printf ("Device  bus  dev  func  deviceID  vendorID \n");
-#endif
-	pci_bus_scan ();
-}
-
-void configure_pins (void)
-{
-	unsigned int regval;
-
-	/* Disable clock on GPIO PIN 14 */
-	READ_GPIO_REG (IXP425_GPIO_GPCLKR, regval);
-	WRITE_GPIO_REG (IXP425_GPIO_GPCLKR, regval & (~(1 << 8)));
-	READ_GPIO_REG (IXP425_GPIO_GPCLKR, regval);
-
-	READ_GPIO_REG (IXP425_GPIO_GPOER, regval);
-	WRITE_GPIO_REG (IXP425_GPIO_GPOER,
-			(((~(3 << 13)) & regval) | (0xf << 8)));
-	READ_GPIO_REG (IXP425_GPIO_GPOER, regval);
-
-	READ_GPIO_REG (IXP425_GPIO_GPIT2R, regval);
-	WRITE_GPIO_REG (IXP425_GPIO_GPIT2R,
-			(regval &
-			 ((0x1 << 9) | (0x1 << 6) | (0x1 << 3) | 0x1)));
-	READ_GPIO_REG (IXP425_GPIO_GPIT2R, regval);
-
-	READ_GPIO_REG (IXP425_GPIO_GPISR, regval);
-	WRITE_GPIO_REG (IXP425_GPIO_GPISR, (regval | (0xf << 8)));
-	READ_GPIO_REG (IXP425_GPIO_GPISR, regval);
+	/*
+	 * The CRP address register bit 16 indicates that we want to do a
+	 * write
+	 */
+	writel(PCI_CRP_WRITE | offset, PCI_CSR_BASE + PCI_CRP_AD_CBE_OFFSET);
+	writel(data, PCI_CSR_BASE + PCI_CRP_WDATA_OFFSET);
 }
 
-void sys_pci_gpio_clock_config (void)
+void pci_ixp_init(struct pci_controller *hose)
 {
-	unsigned int regval;
-
-	READ_GPIO_REG (IXP425_GPIO_GPCLKR, regval);
-	regval |= 0x1 << 4;
-	WRITE_GPIO_REG (IXP425_GPIO_GPCLKR, regval);
-	READ_GPIO_REG (IXP425_GPIO_GPCLKR, regval);
-	regval |= 0x1 << 8;
-	WRITE_GPIO_REG (IXP425_GPIO_GPCLKR, regval);
-}
+	unsigned int csr;
 
-void pci_bus_scan (void)
-{
-	unsigned int bus = 0, dev, func = 0;
-	unsigned short data16;
-	unsigned int data32;
-	unsigned char intPin;
-
-	/* Assign first device to ourselves */
-	devices[0].bus = 0;
-	devices[0].device = 0;
-	devices[0].func = 0;
-
-	crp_read (PCI_CFG_VENDOR_ID, &data32);
-
-	devices[0].vendor_id = data32 & IXP425_PCI_BOTTOM_WORD_OF_LONG_MASK;
-	devices[0].device_id = data32 >> 16;
-	devices[0].error = FALSE;
-	devices[0].bar[NO_BAR].size = 0;	/*dummy - required */
-
-	nDevices = 1;
-
-	nMBars = 0;
-	nIOBars = 0;
-
-	for (dev = 0; dev < IXP425_PCI_MAX_DEV; dev++) {
-
-		/*Check whether a device is present */
-		if (pci_device_exists (dev) != TRUE) {
-
-			/*Clear error bits in ISR, write 1 to clear */
-			REG_WRITE (PCI_CSR_BASE, PCI_ISR_OFFSET, PCI_ISR_PSE
-				   | PCI_ISR_PFE | PCI_ISR_PPE |
-				   PCI_ISR_AHBE);
-			continue;
-		}
-
-		/*A device is present, add an entry to the array */
-		devices[nDevices].bus = bus;
-		devices[nDevices].device = dev;
-		devices[nDevices].func = func;
-
-		pci_read_config_word (dev, PCI_CFG_VENDOR_ID, &data16);
-
-		devices[nDevices].vendor_id = data16;
-
-		pci_read_config_word (dev, PCI_CFG_DEVICE_ID, &data16);
-		devices[nDevices].device_id = data16;
-
-		/*The device is functioning correctly, set error to FALSE */
-		devices[nDevices].error = FALSE;
-
-		/*Figure out what BARs are on this device */
-		sys_pci_bar_info_get (nDevices, bus, dev, func);
-		/*Figure out what INTX# line the card uses */
-		pci_read_config_byte (dev, PCI_CFG_DEV_INT_PIN, &intPin);
-
-		/*assign the appropriate irq line */
-		if (intPin > PCI_IRQ_LINES) {
-			devices[nDevices].error = TRUE;
-		} else if (intPin != 0) {
-			/*This device uses an interrupt line */
-			/*devices[nDevices].irq = ixp425PciIntTranslate[dev][intPin-1]; */
-			devices[nDevices].irq = intPin;
-		}
-#ifdef CONFIG_PCI_SCAN_SHOW
-		printf ("%06d    %03d %03d %04d  %08d      %08x\n", nDevices,
-			devices[nDevices].vendor_id);
+	/*
+	 * Specify that the AHB bus is operating in big endian mode. Set up
+	 * byte lane swapping between little-endian PCI and the big-endian
+	 * AHB bus
+	 */
+#ifdef __ARMEB__
+	csr =  PCI_CSR_ABE | PCI_CSR_PDS | PCI_CSR_ADS;
+#else
+	csr = PCI_CSR_ABE;
 #endif
-		nDevices++;
-
-	}
-
-	calc_bars (memBars, nMBars, IXP425_PCI_BAR_MEM_BASE);
-	sys_pci_device_bars_write ();
-
-	REG_WRITE (PCI_CSR_BASE, PCI_ISR_OFFSET, PCI_ISR_PSE
-		   | PCI_ISR_PFE | PCI_ISR_PPE | PCI_ISR_AHBE);
-}
-
-void sys_pci_bar_info_get (unsigned int devnum,
-			   unsigned int bus,
-			   unsigned int dev, unsigned int func)
-{
-	unsigned int data32;
-	unsigned int tmp;
-	unsigned int size;
-
-	pci_write_config_dword (devnum,
-				PCI_CFG_BASE_ADDRESS_0, IXP425_PCI_BAR_QUERY);
-	pci_read_config_dword (devnum, PCI_CFG_BASE_ADDRESS_0, &data32);
+	writel(csr, PCI_CSR_BASE + PCI_CSR_OFFSET);
 
-	devices[devnum].bar[0].address = (data32 & 1);
+	writel(0, PCI_CSR_BASE + PCI_INTEN_OFFSET);
 
-	if (data32 & 1) {
-		/* IO space */
-		tmp = data32 & ~0x3;
-		size = ~(tmp - 1);
-		devices[devnum].bar[0].size = size;
-
-		if (nIOBars < IXP425_PCI_MAX_BAR) {
-			ioBars[nIOBars++] = &devices[devnum].bar[0];
-		}
-	} else {
-		/* Mem space */
-		tmp = data32 & ~IXP425_PCI_BOTTOM_NIBBLE_OF_LONG_MASK;
-		size = ~(tmp - 1);
-		devices[devnum].bar[0].size = size;
-
-		if (nMBars < IXP425_PCI_MAX_BAR) {
-			memBars[nMBars++] = &devices[devnum].bar[0];
-		} else {
-			devices[devnum].error = TRUE;
-		}
-
-	}
-
-	devices[devnum].bar[1].size = 0;
-}
-
-void sortBars (PciBar * Bars[], unsigned int nBars)
-{
-	unsigned int i, j;
-	PciBar *tmp;
-
-	if (nBars == 0) {
-		return;
-	}
-
-	/* Sort biggest to smallest */
-	for (i = 0; i < nBars - 1; i++) {
-		for (j = i + 1; j < nBars; j++) {
-			if (Bars[j]->size > Bars[i]->size) {
-				/* swap them */
-				tmp = Bars[i];
-				Bars[i] = Bars[j];
-				Bars[j] = tmp;
-			}
-		}
-	}
-}
+	/*
+	 * We configure the PCI inbound memory windows to be
+	 * 1:1 mapped to SDRAM
+	 */
+	crp_write(PCI_CFG_BASE_ADDRESS_0, 0x00000000);
+	crp_write(PCI_CFG_BASE_ADDRESS_1, 0x01000000);
+	crp_write(PCI_CFG_BASE_ADDRESS_2, 0x02000000);
+	crp_write(PCI_CFG_BASE_ADDRESS_3, 0x03000000);
+
+	/*
+	 * Enable CSR window at 64 MiB to allow PCI masters
+	 * to continue prefetching past 64 MiB boundary.
+	 */
+	crp_write(PCI_CFG_BASE_ADDRESS_4, 0x04000000);
+	/*
+	 * Enable the IO window to be way up high, at 0xfffffc00
+	 */
+	crp_write(PCI_CFG_BASE_ADDRESS_5, 0xfffffc01);
 
-void calc_bars (PciBar * Bars[], unsigned int nBars, unsigned int startAddr)
-{
-	unsigned int i;
+	/*Setup PCI-AHB and AHB-PCI address mappings */
+	writel(0x00010203, PCI_CSR_BASE + PCI_AHBMEMBASE_OFFSET);
 
-	if (nBars == 0) {
-		return;
-	}
+	writel(0x00000000, PCI_CSR_BASE + PCI_AHBIOBASE_OFFSET);
 
-	for (i = 0; i < nBars; i++) {
-		Bars[i]->address |= startAddr;
-		startAddr += Bars[i]->size;
-	}
-}
+	writel(0x48494a4b, PCI_CSR_BASE + PCI_PCIMEMBASE_OFFSET);
 
-void sys_pci_device_bars_write (void)
-{
-	unsigned int i;
-	int addr;
-
-	for (i = 1; i < nDevices; i++) {
-		if (devices[i].error) {
-			continue;
-		}
-
-		pci_write_config_dword (devices[i].device,
-					PCI_CFG_BASE_ADDRESS_0,
-					devices[i].bar[0].address);
-		addr = BIT (31 - devices[i].device) |
-			(0 << PCI_NP_AD_FUNCSL) |
-			(PCI_CFG_BASE_ADDRESS_0 & ~3);
-		pci_write_config_dword (devices[i].device,
-					PCI_CFG_DEV_INT_LINE, devices[i].irq);
-
-		pci_write_config_word (devices[i].device,
-				       PCI_CFG_COMMAND, INITIAL_PCI_CMD);
+	crp_write(PCI_CFG_SUB_VENDOR_ID, IXP425_PCI_SUB_VENDOR_SYSTEM);
 
-	}
-}
+	crp_write(PCI_CFG_COMMAND, PCI_CFG_CMD_MAE | PCI_CFG_CMD_BME);
+	udelay(1000);
 
+	/* clear error bits in status register */
+	writel(PCI_ISR_PSE | PCI_ISR_PFE | PCI_ISR_PPE | PCI_ISR_AHBE,
+	       PCI_CSR_BASE + PCI_ISR_OFFSET);
 
-int pci_device_exists (unsigned int deviceNo)
-{
-	unsigned int vendorId;
-	unsigned int regval;
-
-	pci_read_config_dword (deviceNo, PCI_CFG_VENDOR_ID, &vendorId);
-
-	/* There are two ways to find out an empty device.
-	 *   1. check Master Abort bit after the access.
-	 *   2. check whether the vendor id read back is 0x0.
+	/*
+	 * Set Initialize Complete in PCI Control Register: allow IXP4XX to
+	 * respond to PCI configuration cycles.
 	 */
-	REG_READ (PCI_CSR_BASE, PCI_ISR_OFFSET, regval);
-	if ((vendorId != 0x0) && ((regval & PCI_ISR_PFE) == 0)) {
-		return TRUE;
-	}
-	/*no device present, make sure that the master abort bit is reset */
+	csr |= PCI_CSR_IC;
+	writel(csr, PCI_CSR_BASE + PCI_CSR_OFFSET);
 
-	REG_WRITE (PCI_CSR_BASE, PCI_ISR_OFFSET, PCI_ISR_PFE);
-	return FALSE;
-}
+	hose->first_busno = 0;
+	hose->last_busno = 0;
 
-pci_dev_t pci_find_devices (struct pci_device_id * ids, int devNo)
-{
-	unsigned int i;
-	unsigned int devdidvid;
-	unsigned int didvid;
-	unsigned int vendorId, deviceId;
+	/* System memory space */
+	pci_set_region(hose->regions + 0,
+		       PCI_MEMORY_BUS,
+		       PCI_MEMORY_PHY, PCI_MEMORY_SIZE, PCI_REGION_SYS_MEMORY);
 
-	vendorId = ids->vendor;
-	deviceId = ids->device;
-	didvid = ((deviceId << 16) & IXP425_PCI_TOP_WORD_OF_LONG_MASK) |
-		(vendorId & IXP425_PCI_BOTTOM_WORD_OF_LONG_MASK);
+	/* PCI memory space */
+	pci_set_region(hose->regions + 1,
+		       PCI_MEM_BUS,
+		       PCI_MEM_PHY, PCI_MEM_SIZE, PCI_REGION_MEM);
+	/* PCI I/O space */
+	pci_set_region(hose->regions + 2,
+		       PCI_IO_BUS, PCI_IO_PHY, PCI_IO_SIZE, PCI_REGION_IO);
 
-	for (i = devNo + 1; i < nDevices; i++) {
+	hose->region_count = 3;
 
-		pci_read_config_dword (devices[i].device, PCI_CFG_VENDOR_ID,
-				       &devdidvid);
+	pci_set_ops(hose,
+		    pci_ixp_hose_read_config_byte,
+		    pci_ixp_hose_read_config_word,
+		    pci_ixp_hose_read_config_dword,
+		    pci_ixp_hose_write_config_byte,
+		    pci_ixp_hose_write_config_word,
+		    pci_ixp_hose_write_config_dword);
 
-		if (devdidvid == didvid) {
-			return devices[i].device;
-		}
-	}
-	return -1;
+	pci_register_hose(hose);
+	hose->last_busno = pci_hose_scan(hose);
 }