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 --- Changes for V3: - new in V3 Changes for V4: - add changelog Changes for V5:
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@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); }