[U-Boot] [IXP42x PATCH series v4 16/17] IXP42x PCI rewrite
Michael Schwingen
michael at schwingen.org
Wed Apr 6 23:49:17 CEST 2011
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 at schwingen.org>
---
Changes for V3:
- new in V3
Changes for V4:
- add changelog
arch/arm/include/asm/arch-ixp/ixp425pci.h | 130 +------
drivers/pci/pci.c | 4 -
drivers/pci/pci_indirect.c | 13 +-
drivers/pci/pci_ixp.c | 612 ++++++++++-------------------
4 files changed, 210 insertions(+), 549 deletions(-)
diff --git a/arch/arm/include/asm/arch-ixp/ixp425pci.h b/arch/arm/include/asm/arch-ixp/ixp425pci.h
index 9ea3319..acafea7 100644
--- a/arch/arm/include/asm/arch-ixp/ixp425pci.h
+++ b/arch/arm/include/asm/arch-ixp/ixp425pci.h
@@ -22,88 +22,21 @@
* MA 02111-1307 USA
*/
-#ifndef _IXP425PCI_H_
-#define _IXP425PCI_H_
+#ifndef _IXP425PCI_H
+#define _IXP425PCI_H
-#define TRUE 1
-#define FALSE 0
#define OK 0
#define ERROR -1
-#define BOOL int
-#define IXP425_PCI_MAX_BAR_PER_FUNC 6
-#define IXP425_PCI_MAX_BAR (IXP425_PCI_MAX_BAR_PER_FUNC * \
- IXP425_PCI_MAX_FUNC_ON_BUS)
-
-enum PciBarId
-{
- CSR_BAR=0,
- IO_BAR,
- SD_BAR,
- NO_BAR
-};
-
-/*Base address register descriptor*/
-typedef struct
-{
- unsigned int size;
- unsigned int address;
-} PciBar;
-
-typedef struct
-{
- unsigned int bus;
- unsigned int device;
- unsigned int func;
- unsigned int irq;
- BOOL error;
- unsigned short vendor_id;
- unsigned short device_id;
- /*We need an extra entry in this array for dummy placeholder*/
- PciBar bar[IXP425_PCI_MAX_BAR_PER_FUNC + 1];
-} PciDevice;
+struct pci_controller;
+extern void pci_ixp_init(struct pci_controller *hose);
/* Mask definitions*/
-#define IXP425_PCI_TOP_WORD_OF_LONG_MASK 0xffff0000
-#define IXP425_PCI_TOP_BYTE_OF_LONG_MASK 0xff000000
-#define IXP425_PCI_BOTTOM_WORD_OF_LONG_MASK 0x0000ffff
-#define IXP425_PCI_BOTTOM_TRIBYTES_OF_LONG_MASK 0x00ffffff
#define IXP425_PCI_BOTTOM_NIBBLE_OF_LONG_MASK 0x0000000f
-#define IXP425_PCI_MAX_UINT32 0xffffffff
-
-
-#define IXP425_PCI_BAR_QUERY 0xffffffff
-
-#define IXP425_PCI_BAR_MEM_BASE 0x100000
-#define IXP425_PCI_BAR_IO_BASE 0x000000
-
-/*define the maximum number of bus segments - we support a single segment*/
-#define IXP425_PCI_MAX_BUS 1
-/*define the maximum number of cards per bus segment*/
-#define IXP425_PCI_MAX_DEV 4
-/*define the maximum number of functions per device*/
-#define IXP425_PCI_MAX_FUNC 8
-/* define the maximum number of separate functions that we can
- potentially have on the bus*/
-#define IXP425_PCI_MAX_FUNC_ON_BUS (1+ IXP425_PCI_MAX_FUNC * \
- IXP425_PCI_MAX_DEV * \
- IXP425_PCI_MAX_BUS)
-/*define the maximum number of BARs per function*/
-#define IXP425_PCI_MAX_BAR_PER_FUNC 6
-#define IXP425_PCI_MAX_BAR (IXP425_PCI_MAX_BAR_PER_FUNC * \
- IXP425_PCI_MAX_FUNC_ON_BUS)
#define PCI_NP_CBE_BESL (4)
#define PCI_NP_AD_FUNCSL (8)
-#define REG_WRITE(b,o,v) (*(volatile unsigned int*)((b+o))=(v))
-#define REG_READ(b,o,v) ((v)=(*(volatile unsigned int*)((b+o))))
-
-#define PCI_DELAY 500
-#define USEC_LOOP_COUNT 533
-#define PCI_SETTLE_USEC 200
-#define PCI_MIN_RESET_ASSERT_USEC 2000
-
/*Register addressing definitions for PCI controller configuration
and status registers*/
@@ -150,28 +83,6 @@ typedef struct
#define NP_CMD_CONFIGWRITE (0xb)
*/
-/*define the default setting of the AHB memory base reg*/
-#define IXP425_PCI_AHBMEMBASE_DEFAULT 0x00010203
-#define IXP425_PCI_AHBIOBASE_DEFAULT 0x0
-#define IXP425_PCI_PCIMEMBASE_DEFAULT 0x0
-
-/*define the default settings for the controller's BARs*/
-#ifdef IXP425_PCI_SIMPLE_MAPPING
-#define IXP425_PCI_BAR_0_DEFAULT 0x00000000
-#define IXP425_PCI_BAR_1_DEFAULT 0x01000000
-#define IXP425_PCI_BAR_2_DEFAULT 0x02000000
-#define IXP425_PCI_BAR_3_DEFAULT 0x03000000
-#define IXP425_PCI_BAR_4_DEFAULT 0x00000000
-#define IXP425_PCI_BAR_5_DEFAULT 0x00000000
-#else
-#define IXP425_PCI_BAR_0_DEFAULT 0x40000000
-#define IXP425_PCI_BAR_1_DEFAULT 0x41000000
-#define IXP425_PCI_BAR_2_DEFAULT 0x42000000
-#define IXP425_PCI_BAR_3_DEFAULT 0x43000000
-#define IXP425_PCI_BAR_4_DEFAULT 0x00000000
-#define IXP425_PCI_BAR_5_DEFAULT 0x00000000
-#endif
-
/*Configuration Port register bit definitions*/
#define PCI_CRP_WRITE BIT(16)
@@ -228,17 +139,6 @@ typedef struct
#define PCI_CFG_SPECIAL_USE 0x41
#define PCI_CFG_MODE 0x43
-/*Specify the initial command we send to PCI devices*/
-#define INITIAL_PCI_CMD (PCI_CMD_IO_ENABLE \
- | PCI_CMD_MEM_ENABLE \
- | PCI_CMD_MASTER_ENABLE \
- | PCI_CMD_WI_ENABLE)
-
-/*define the sub vendor and subsystem to be used */
-#define IXP425_PCI_SUB_VENDOR_SYSTEM 0x00000000
-
-#define PCI_IRQ_LINES 4
-
#define PCI_CMD_IO_ENABLE 0x0001 /* IO access enable */
#define PCI_CMD_MEM_ENABLE 0x0002 /* memory access enable */
#define PCI_CMD_MASTER_ENABLE 0x0004 /* bus master enable */
@@ -287,26 +187,4 @@ typedef struct
#define PCI_DMACTRL_PADC1 BIT(14)
#define PCI_DMACTRL_PADE1 BIT(15)
-/* GPIO related register */
-#undef IXP425_GPIO_GPOUTR
-#undef IXP425_GPIO_GPOER
-#undef IXP425_GPIO_GPINR
-#undef IXP425_GPIO_GPISR
-#undef IXP425_GPIO_GPIT1R
-#undef IXP425_GPIO_GPIT2R
-#undef IXP425_GPIO_GPCLKR
-
-#define IXP425_GPIO_GPOUTR 0xC8004000
-#define IXP425_GPIO_GPOER 0xC8004004
-#define IXP425_GPIO_GPINR 0xC8004008
-#define IXP425_GPIO_GPISR 0xC800400C
-#define IXP425_GPIO_GPIT1R 0xC8004010
-#define IXP425_GPIO_GPIT2R 0xC8004014
-#define IXP425_GPIO_GPCLKR 0xC8004018
-
-#define READ_GPIO_REG(addr,val) \
- (val) = *((volatile int *)(addr));
-#define WRITE_GPIO_REG(addr,val) \
- *((volatile int *)(addr)) = (val);
-
#endif
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 at schwingen.org
* (C) Copyright 2004 eslab.whut.edu.cn
* Yue Hu(huyue_whut at yahoo.com.cn), Ligong Xue(lgxue at 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);
}
--
1.7.2.5
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