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u-boot/arch/powerpc/cpu/ppc4xx/4xx_pci.c
Wolfgang Denk e5d5ed4b20 4xx_pci.c: add error checking, fix GCC 4.6 build warning 
Fix:
4xx_pci.c: In function 'pci_init_board':
4xx_pci.c:855:6: warning: variable 'busno' set but not used
[-Wunused-but-set-variable]

Signed-off-by: Wolfgang Denk <wd@denx.de>
Cc: Stefan Roese <sr@denx.de>
Acked-by: Stefan Roese <sr@denx.de>
2011-11-03 20:40:38 +01:00

885 lines
29 KiB
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Raw Blame History

/*-----------------------------------------------------------------------------+
* This source code is dual-licensed. You may use it under the terms of
* the GNU General Public license version 2, or under the license below.
*
* This source code has been made available to you by IBM on an AS-IS
* basis. Anyone receiving this source is licensed under IBM
* copyrights to use it in any way he or she deems fit, including
* copying it, modifying it, compiling it, and redistributing it either
* with or without modifications. No license under IBM patents or
* patent applications is to be implied by the copyright license.
*
* Any user of this software should understand that IBM cannot provide
* technical support for this software and will not be responsible for
* any consequences resulting from the use of this software.
*
* Any person who transfers this source code or any derivative work
* must include the IBM copyright notice, this paragraph, and the
* preceding two paragraphs in the transferred software.
*
* COPYRIGHT I B M CORPORATION 1995
* LICENSED MATERIAL - PROGRAM PROPERTY OF I B M
*-----------------------------------------------------------------------------*/
/*----------------------------------------------------------------------------+
*
* File Name: 405gp_pci.c
*
* Function: Initialization code for the 405GP PCI Configuration regs.
*
* Author: Mark Game
*
* Change Activity-
*
* Date Description of Change BY
* --------- --------------------- ---
* 09-Sep-98 Created MCG
* 02-Nov-98 Removed External arbiter selected message JWB
* 27-Nov-98 Zero out PTMBAR2 and disable in PTM2MS JWB
* 04-Jan-99 Zero out other unused PMM and PTM regs. Change bus scan MCG
* from (0 to n) to (1 to n).
* 17-May-99 Port to Walnut JWB
* 17-Jun-99 Updated for VGA support JWB
* 21-Jun-99 Updated to allow SRAM region to be a target from PCI bus JWB
* 19-Jul-99 Updated for 405GP pass 1 errata #26 (Low PCI subsequent MCG
* target latency timer values are not supported).
* Should be fixed in pass 2.
* 09-Sep-99 Removed use of PTM2 since the SRAM region no longer needs JWB
* to be a PCI target. Zero out PTMBAR2 and disable in PTM2MS.
* 10-Dec-99 Updated PCI_Write_CFG_Reg for pass2 errata #6 JWB
* 11-Jan-00 Ensure PMMxMAs disabled before setting PMMxLAs. This is not
* really required after a reset since PMMxMAs are already
* disabled but is a good practice nonetheless. JWB
* 12-Jun-01 stefan.roese@esd-electronics.com
* - PCI host/adapter handling reworked
* 09-Jul-01 stefan.roese@esd-electronics.com
* - PCI host now configures from device 0 (not 1) to max_dev,
* (host configures itself)
* - On CPCI-405 pci base address and size is generated from
* SDRAM and FLASH size (CFG regs not used anymore)
* - Some minor changes for CPCI-405-A (adapter version)
* 14-Sep-01 stefan.roese@esd-electronics.com
* - CONFIG_PCI_SCAN_SHOW added to print pci devices upon startup
* 28-Sep-01 stefan.roese@esd-electronics.com
* - Changed pci master configuration for linux compatibility
* (no need for bios_fixup() anymore)
* 26-Feb-02 stefan.roese@esd-electronics.com
* - Bug fixed in pci configuration (Andrew May)
* - Removed pci class code init for CPCI405 board
* 15-May-02 stefan.roese@esd-electronics.com
* - New vga device handling
* 29-May-02 stefan.roese@esd-electronics.com
* - PCI class code init added (if defined)
*----------------------------------------------------------------------------*/
#include <common.h>
#include <command.h>
#include <asm/4xx_pci.h>
#include <asm/processor.h>
#include <asm/io.h>
#include <pci.h>
#ifdef CONFIG_PCI
DECLARE_GLOBAL_DATA_PTR;
#if defined(CONFIG_405GP) || defined(CONFIG_405EP)
#if defined(CONFIG_PMC405)
ushort pmc405_pci_subsys_deviceid(void);
#endif
/*#define DEBUG*/
/*
* Board-specific pci initialization
* Platform code can reimplement pci_pre_init() if needed
*/
int __pci_pre_init(struct pci_controller *hose)
{
#if defined(CONFIG_405EP)
/*
* Enable the internal PCI arbiter by default.
*
* On 405EP CPUs the internal arbiter can be controlled
* by the I2C strapping EEPROM. If you want to do so
* or if you want to disable the arbiter pci_pre_init()
* must be reimplemented without enabling the arbiter.
* The arbiter is enabled in this place because of
* compatibility reasons.
*/
mtdcr(CPC0_PCI, mfdcr(CPC0_PCI) | CPC0_PCI_ARBIT_EN);
#endif /* CONFIG_405EP */
return 1;
}
int pci_pre_init(struct pci_controller *hose)
__attribute__((weak, alias("__pci_pre_init")));
int __is_pci_host(struct pci_controller *hose)
{
#if defined(CONFIG_405GP)
if (mfdcr(CPC0_PSR) & PSR_PCI_ARBIT_EN)
return 1;
#elif defined (CONFIG_405EP)
if (mfdcr(CPC0_PCI) & CPC0_PCI_ARBIT_EN)
return 1;
#endif
return 0;
}
int is_pci_host(struct pci_controller *hose) __attribute__((weak, alias("__is_pci_host")));
/*-----------------------------------------------------------------------------+
* pci_init. Initializes the 405GP PCI Configuration regs.
*-----------------------------------------------------------------------------*/
void pci_405gp_init(struct pci_controller *hose)
{
int i, reg_num = 0;
bd_t *bd = gd->bd;
unsigned short temp_short;
unsigned long ptmpcila[2] = {CONFIG_SYS_PCI_PTM1PCI, CONFIG_SYS_PCI_PTM2PCI};
#if defined(CONFIG_PCI_4xx_PTM_OVERWRITE)
char *ptmla_str, *ptmms_str;
#endif
unsigned long ptmla[2] = {CONFIG_SYS_PCI_PTM1LA, CONFIG_SYS_PCI_PTM2LA};
unsigned long ptmms[2] = {CONFIG_SYS_PCI_PTM1MS, CONFIG_SYS_PCI_PTM2MS};
#if defined(CONFIG_PIP405) || defined (CONFIG_MIP405)
unsigned long pmmla[3] = {0x80000000, 0xA0000000, 0};
unsigned long pmmma[3] = {0xE0000001, 0xE0000001, 0};
unsigned long pmmpcila[3] = {0x80000000, 0x00000000, 0};
unsigned long pmmpciha[3] = {0x00000000, 0x00000000, 0};
#else
unsigned long pmmla[3] = {0x80000000, 0,0};
unsigned long pmmma[3] = {0xC0000001, 0,0};
unsigned long pmmpcila[3] = {0x80000000, 0,0};
unsigned long pmmpciha[3] = {0x00000000, 0,0};
#endif
#ifdef CONFIG_PCI_PNP
#if (CONFIG_PCI_HOST == PCI_HOST_AUTO)
char *s;
#endif
#endif
#if defined(CONFIG_PCI_4xx_PTM_OVERWRITE)
ptmla_str = getenv("ptm1la");
ptmms_str = getenv("ptm1ms");
if(NULL != ptmla_str && NULL != ptmms_str ) {
ptmla[0] = simple_strtoul (ptmla_str, NULL, 16);
ptmms[0] = simple_strtoul (ptmms_str, NULL, 16);
}
ptmla_str = getenv("ptm2la");
ptmms_str = getenv("ptm2ms");
if(NULL != ptmla_str && NULL != ptmms_str ) {
ptmla[1] = simple_strtoul (ptmla_str, NULL, 16);
ptmms[1] = simple_strtoul (ptmms_str, NULL, 16);
}
#endif
/*
* Register the hose
*/
hose->first_busno = 0;
hose->last_busno = 0xff;
/* ISA/PCI I/O space */
pci_set_region(hose->regions + reg_num++,
MIN_PCI_PCI_IOADDR,
MIN_PLB_PCI_IOADDR,
0x10000,
PCI_REGION_IO);
/* PCI I/O space */
pci_set_region(hose->regions + reg_num++,
0x00800000,
0xe8800000,
0x03800000,
PCI_REGION_IO);
reg_num = 2;
/* Memory spaces */
for (i=0; i<2; i++)
if (ptmms[i] & 1)
{
if (!i) hose->pci_fb = hose->regions + reg_num;
pci_set_region(hose->regions + reg_num++,
ptmpcila[i], ptmla[i],
~(ptmms[i] & 0xfffff000) + 1,
PCI_REGION_MEM |
PCI_REGION_SYS_MEMORY);
}
/* PCI memory spaces */
for (i=0; i<3; i++)
if (pmmma[i] & 1)
{
pci_set_region(hose->regions + reg_num++,
pmmpcila[i], pmmla[i],
~(pmmma[i] & 0xfffff000) + 1,
PCI_REGION_MEM);
}
hose->region_count = reg_num;
pci_setup_indirect(hose,
PCICFGADR,
PCICFGDATA);
if (hose->pci_fb)
pciauto_region_init(hose->pci_fb);
/* Let board change/modify hose & do initial checks */
if (pci_pre_init(hose) == 0) {
printf("PCI: Board-specific initialization failed.\n");
printf("PCI: Configuration aborted.\n");
return;
}
pci_register_hose(hose);
/*--------------------------------------------------------------------------+
* 405GP PCI Master configuration.
* Map one 512 MB range of PLB/processor addresses to PCI memory space.
* PLB address 0x80000000-0xBFFFFFFF ==> PCI address 0x80000000-0xBFFFFFFF
* Use byte reversed out routines to handle endianess.
*--------------------------------------------------------------------------*/
out32r(PMM0MA, (pmmma[0]&~0x1)); /* disable, configure PMMxLA, PMMxPCILA first */
out32r(PMM0LA, pmmla[0]);
out32r(PMM0PCILA, pmmpcila[0]);
out32r(PMM0PCIHA, pmmpciha[0]);
out32r(PMM0MA, pmmma[0]);
/*--------------------------------------------------------------------------+
* PMM1 is not used. Initialize them to zero.
*--------------------------------------------------------------------------*/
out32r(PMM1MA, (pmmma[1]&~0x1));
out32r(PMM1LA, pmmla[1]);
out32r(PMM1PCILA, pmmpcila[1]);
out32r(PMM1PCIHA, pmmpciha[1]);
out32r(PMM1MA, pmmma[1]);
/*--------------------------------------------------------------------------+
* PMM2 is not used. Initialize them to zero.
*--------------------------------------------------------------------------*/
out32r(PMM2MA, (pmmma[2]&~0x1));
out32r(PMM2LA, pmmla[2]);
out32r(PMM2PCILA, pmmpcila[2]);
out32r(PMM2PCIHA, pmmpciha[2]);
out32r(PMM2MA, pmmma[2]);
/*--------------------------------------------------------------------------+
* 405GP PCI Target configuration. (PTM1)
* Note: PTM1MS is hardwire enabled but we set the enable bit anyway.
*--------------------------------------------------------------------------*/
out32r(PTM1LA, ptmla[0]); /* insert address */
out32r(PTM1MS, ptmms[0]); /* insert size, enable bit is 1 */
pci_write_config_dword(PCIDEVID_405GP, PCI_BASE_ADDRESS_1, ptmpcila[0]);
/*--------------------------------------------------------------------------+
* 405GP PCI Target configuration. (PTM2)
*--------------------------------------------------------------------------*/
out32r(PTM2LA, ptmla[1]); /* insert address */
pci_write_config_dword(PCIDEVID_405GP, PCI_BASE_ADDRESS_2, ptmpcila[1]);
if (ptmms[1] == 0)
{
out32r(PTM2MS, 0x00000001); /* set enable bit */
pci_write_config_dword(PCIDEVID_405GP, PCI_BASE_ADDRESS_2, 0x00000000);
out32r(PTM2MS, 0x00000000); /* disable */
}
else
{
out32r(PTM2MS, ptmms[1]); /* insert size, enable bit is 1 */
}
/*
* Insert Subsystem Vendor and Device ID
*/
pci_write_config_word(PCIDEVID_405GP, PCI_SUBSYSTEM_VENDOR_ID, CONFIG_SYS_PCI_SUBSYS_VENDORID);
#ifdef CONFIG_CPCI405
if (is_pci_host(hose))
pci_write_config_word(PCIDEVID_405GP, PCI_SUBSYSTEM_ID, CONFIG_SYS_PCI_SUBSYS_DEVICEID);
else
pci_write_config_word(PCIDEVID_405GP, PCI_SUBSYSTEM_ID, CONFIG_SYS_PCI_SUBSYS_DEVICEID2);
#else
pci_write_config_word(PCIDEVID_405GP, PCI_SUBSYSTEM_ID, CONFIG_SYS_PCI_SUBSYS_DEVICEID);
#endif
/*
* Insert Class-code
*/
#ifdef CONFIG_SYS_PCI_CLASSCODE
pci_write_config_word(PCIDEVID_405GP, PCI_CLASS_SUB_CODE, CONFIG_SYS_PCI_CLASSCODE);
#endif /* CONFIG_SYS_PCI_CLASSCODE */
/*--------------------------------------------------------------------------+
* If PCI speed = 66MHz, set 66MHz capable bit.
*--------------------------------------------------------------------------*/
if (bd->bi_pci_busfreq >= 66000000) {
pci_read_config_word(PCIDEVID_405GP, PCI_STATUS, &temp_short);
pci_write_config_word(PCIDEVID_405GP,PCI_STATUS,(temp_short|PCI_STATUS_66MHZ));
}
#if (CONFIG_PCI_HOST != PCI_HOST_ADAPTER)
#if (CONFIG_PCI_HOST == PCI_HOST_AUTO)
if (is_pci_host(hose) ||
(((s = getenv("pciscan")) != NULL) && (strcmp(s, "yes") == 0)))
#endif
{
/*--------------------------------------------------------------------------+
* Write the 405GP PCI Configuration regs.
* Enable 405GP to be a master on the PCI bus (PMM).
* Enable 405GP to act as a PCI memory target (PTM).
*--------------------------------------------------------------------------*/
pci_read_config_word(PCIDEVID_405GP, PCI_COMMAND, &temp_short);
pci_write_config_word(PCIDEVID_405GP, PCI_COMMAND, temp_short |
PCI_COMMAND_MASTER | PCI_COMMAND_MEMORY);
}
#endif
#if defined(CONFIG_405EP)
/*
* on ppc405ep vendor/device id is not set
* The user manual says 0x1014 (IBM) / 0x0156 (405GP!)
* are the correct values.
*/
pci_write_config_word(PCIDEVID_405GP, PCI_VENDOR_ID, PCI_VENDOR_ID_IBM);
pci_write_config_word(PCIDEVID_405GP,
PCI_DEVICE_ID, PCI_DEVICE_ID_IBM_405GP);
#endif
/*
* Set HCE bit (Host Configuration Enabled)
*/
pci_read_config_word(PCIDEVID_405GP, PCIBRDGOPT2, &temp_short);
pci_write_config_word(PCIDEVID_405GP, PCIBRDGOPT2, (temp_short | 0x0001));
#ifdef CONFIG_PCI_PNP
/*--------------------------------------------------------------------------+
* Scan the PCI bus and configure devices found.
*--------------------------------------------------------------------------*/
#if (CONFIG_PCI_HOST == PCI_HOST_AUTO)
if (is_pci_host(hose) ||
(((s = getenv("pciscan")) != NULL) && (strcmp(s, "yes") == 0)))
#endif
{
#ifdef CONFIG_PCI_SCAN_SHOW
printf("PCI: Bus Dev VenId DevId Class Int\n");
#endif
hose->last_busno = pci_hose_scan(hose);
}
#endif /* CONFIG_PCI_PNP */
}
/*
* drivers/pci/pci.c skips every host bridge but the 405GP since it could
* be set as an Adapter.
*
* I (Andrew May) don't know what we should do here, but I don't want
* the auto setup of a PCI device disabling what is done pci_405gp_init
* as has happened before.
*/
void pci_405gp_setup_bridge(struct pci_controller *hose, pci_dev_t dev,
struct pci_config_table *entry)
{
#ifdef DEBUG
printf("405gp_setup_bridge\n");
#endif
}
/*
*
*/
void pci_405gp_fixup_irq(struct pci_controller *hose, pci_dev_t dev)
{
unsigned char int_line = 0xff;
/*
* Write pci interrupt line register (cpci405 specific)
*/
switch (PCI_DEV(dev) & 0x03)
{
case 0:
int_line = 27 + 2;
break;
case 1:
int_line = 27 + 3;
break;
case 2:
int_line = 27 + 0;
break;
case 3:
int_line = 27 + 1;
break;
}
pci_hose_write_config_byte(hose, dev, PCI_INTERRUPT_LINE, int_line);
}
void pci_405gp_setup_vga(struct pci_controller *hose, pci_dev_t dev,
struct pci_config_table *entry)
{
unsigned int cmdstat = 0;
pciauto_setup_device(hose, dev, 6, hose->pci_mem, hose->pci_prefetch, hose->pci_io);
/* always enable io space on vga boards */
pci_hose_read_config_dword(hose, dev, PCI_COMMAND, &cmdstat);
cmdstat |= PCI_COMMAND_IO;
pci_hose_write_config_dword(hose, dev, PCI_COMMAND, cmdstat);
}
#if !(defined(CONFIG_PIP405) || defined (CONFIG_MIP405)) && !(defined (CONFIG_SC3))
/*
*As is these functs get called out of flash Not a horrible
*thing, but something to keep in mind. (no statics?)
*/
static struct pci_config_table pci_405gp_config_table[] = {
/*if VendID is 0 it terminates the table search (ie Walnut)*/
#ifdef CONFIG_SYS_PCI_SUBSYS_VENDORID
{CONFIG_SYS_PCI_SUBSYS_VENDORID, PCI_ANY_ID, PCI_CLASS_BRIDGE_HOST,
PCI_ANY_ID, PCI_ANY_ID, PCI_ANY_ID, pci_405gp_setup_bridge},
#endif
{PCI_ANY_ID, PCI_ANY_ID, PCI_CLASS_DISPLAY_VGA,
PCI_ANY_ID, PCI_ANY_ID, PCI_ANY_ID, pci_405gp_setup_vga},
{PCI_ANY_ID, PCI_ANY_ID, PCI_CLASS_NOT_DEFINED_VGA,
PCI_ANY_ID, PCI_ANY_ID, PCI_ANY_ID, pci_405gp_setup_vga},
{ }
};
static struct pci_controller hose = {
fixup_irq: pci_405gp_fixup_irq,
config_table: pci_405gp_config_table,
};
void pci_init_board(void)
{
/*we want the ptrs to RAM not flash (ie don't use init list)*/
hose.fixup_irq = pci_405gp_fixup_irq;
hose.config_table = pci_405gp_config_table;
pci_405gp_init(&hose);
}
#endif
#endif /* CONFIG_405GP */
/*-----------------------------------------------------------------------------+
* CONFIG_440
*-----------------------------------------------------------------------------*/
#if defined(CONFIG_440)
#if defined(CONFIG_SYS_PCI_MASTER_INIT) || defined(CONFIG_SYS_PCI_TARGET_INIT)
static struct pci_controller ppc440_hose = {0};
#endif
/*
* This routine is called to determine if a pci scan should be
* performed. With various hardware environments (especially cPCI and
* PPMC) it's insufficient to depend on the state of the arbiter enable
* bit in the strap register, or generic host/adapter assumptions.
*
* Rather than hard-code a bad assumption in the general 440 code, the
* 440 pci code requires the board to decide at runtime.
*
* Return 0 for adapter mode, non-zero for host (monarch) mode.
*
* Weak default implementation: "Normal" boards implement the PCI
* host functionality. This can be overridden for PCI adapter boards.
*/
int __is_pci_host(struct pci_controller *hose)
{
return 1;
}
int is_pci_host(struct pci_controller *hose)
__attribute__((weak, alias("__is_pci_host")));
#if defined(CONFIG_440EP) || defined(CONFIG_440EPX) || \
defined(CONFIG_440GR) || defined(CONFIG_440GRX)
#if defined(CONFIG_SYS_PCI_TARGET_INIT)
/*
* pci_target_init
*
* The bootstrap configuration provides default settings for the pci
* inbound map (PIM). But the bootstrap config choices are limited and
* may not be sufficient for a given board.
*/
void __pci_target_init(struct pci_controller *hose)
{
/*
* Set up Direct MMIO registers
*/
/*
* PowerPC440 EP PCI Master configuration.
* Map one 1Gig range of PLB/processor addresses to PCI memory space.
* PLB address 0xA0000000-0xDFFFFFFF ==> PCI address 0xA0000000-0xDFFFFFFF
* Use byte reversed out routines to handle endianess.
* Make this region non-prefetchable.
*/
/* PMM0 Mask/Attribute - disabled b4 setting */
out_le32((void *)PCIL0_PMM0MA, 0x00000000);
/* PMM0 Local Address */
out_le32((void *)PCIL0_PMM0LA, CONFIG_SYS_PCI_MEMBASE);
/* PMM0 PCI Low Address */
out_le32((void *)PCIL0_PMM0PCILA, CONFIG_SYS_PCI_MEMBASE);
/* PMM0 PCI High Address */
out_le32((void *)PCIL0_PMM0PCIHA, 0x00000000);
/* 512M + No prefetching, and enable region */
out_le32((void *)PCIL0_PMM0MA, 0xE0000001);
/* PMM1 Mask/Attribute - disabled b4 setting */
out_le32((void *)PCIL0_PMM1MA, 0x00000000);
/* PMM1 Local Address */
out_le32((void *)PCIL0_PMM1LA, CONFIG_SYS_PCI_MEMBASE2);
/* PMM1 PCI Low Address */
out_le32((void *)PCIL0_PMM1PCILA, CONFIG_SYS_PCI_MEMBASE2);
/* PMM1 PCI High Address */
out_le32((void *)PCIL0_PMM1PCIHA, 0x00000000);
/* 512M + No prefetching, and enable region */
out_le32((void *)PCIL0_PMM1MA, 0xE0000001);
out_le32((void *)PCIL0_PTM1MS, 0x00000001); /* Memory Size/Attribute */
out_le32((void *)PCIL0_PTM1LA, 0); /* Local Addr. Reg */
out_le32((void *)PCIL0_PTM2MS, 0); /* Memory Size/Attribute */
out_le32((void *)PCIL0_PTM2LA, 0); /* Local Addr. Reg */
/*
* Set up Configuration registers
*/
/* Program the board's subsystem id/vendor id */
pci_write_config_word(0, PCI_SUBSYSTEM_VENDOR_ID,
CONFIG_SYS_PCI_SUBSYS_VENDORID);
pci_write_config_word(0, PCI_SUBSYSTEM_ID, CONFIG_SYS_PCI_SUBSYS_ID);
/* Configure command register as bus master */
pci_write_config_word(0, PCI_COMMAND, PCI_COMMAND_MASTER);
/* 240nS PCI clock */
pci_write_config_word(0, PCI_LATENCY_TIMER, 1);
/* No error reporting */
pci_write_config_word(0, PCI_ERREN, 0);
pci_write_config_dword(0, PCI_BRDGOPT2, 0x00000101);
}
#endif /* CONFIG_SYS_PCI_TARGET_INIT */
/*
* pci_pre_init
*
* This routine is called just prior to registering the hose and gives
* the board the opportunity to check things. Returning a value of zero
* indicates that things are bad & PCI initialization should be aborted.
*
* Different boards may wish to customize the pci controller structure
* (add regions, override default access routines, etc) or perform
* certain pre-initialization actions.
*
*/
int __pci_pre_init(struct pci_controller *hose)
{
u32 reg;
/*
* Set priority for all PLB3 devices to 0.
* Set PLB3 arbiter to fair mode.
*/
mfsdr(SDR0_AMP1, reg);
mtsdr(SDR0_AMP1, (reg & 0x000000FF) | 0x0000FF00);
reg = mfdcr(PLB3A0_ACR);
mtdcr(PLB3A0_ACR, reg | 0x80000000);
/*
* Set priority for all PLB4 devices to 0.
*/
mfsdr(SDR0_AMP0, reg);
mtsdr(SDR0_AMP0, (reg & 0x000000FF) | 0x0000FF00);
reg = mfdcr(PLB4A0_ACR) | 0xa0000000;
mtdcr(PLB4A0_ACR, reg);
/*
* Set Nebula PLB4 arbiter to fair mode.
*/
/* Segment0 */
reg = (mfdcr(PLB4A0_ACR) & ~PLB4Ax_ACR_PPM_MASK) | PLB4Ax_ACR_PPM_FAIR;
reg = (reg & ~PLB4Ax_ACR_HBU_MASK) | PLB4Ax_ACR_HBU_ENABLED;
reg = (reg & ~PLB4Ax_ACR_RDP_MASK) | PLB4Ax_ACR_RDP_4DEEP;
reg = (reg & ~PLB4Ax_ACR_WRP_MASK) | PLB4Ax_ACR_WRP_2DEEP;
mtdcr(PLB4A0_ACR, reg);
/* Segment1 */
reg = (mfdcr(PLB4A1_ACR) & ~PLB4Ax_ACR_PPM_MASK) | PLB4Ax_ACR_PPM_FAIR;
reg = (reg & ~PLB4Ax_ACR_HBU_MASK) | PLB4Ax_ACR_HBU_ENABLED;
reg = (reg & ~PLB4Ax_ACR_RDP_MASK) | PLB4Ax_ACR_RDP_4DEEP;
reg = (reg & ~PLB4Ax_ACR_WRP_MASK) | PLB4Ax_ACR_WRP_2DEEP;
mtdcr(PLB4A1_ACR, reg);
#if defined(CONFIG_SYS_PCI_BOARD_FIXUP_IRQ)
hose->fixup_irq = board_pci_fixup_irq;
#endif
return 1;
}
#else /* defined(CONFIG_440EP) ... */
#if defined(CONFIG_SYS_PCI_TARGET_INIT)
void __pci_target_init(struct pci_controller * hose)
{
/*
* Disable everything
*/
out_le32((void *)PCIL0_PIM0SA, 0); /* disable */
out_le32((void *)PCIL0_PIM1SA, 0); /* disable */
out_le32((void *)PCIL0_PIM2SA, 0); /* disable */
out_le32((void *)PCIL0_EROMBA, 0); /* disable expansion rom */
/*
* Map all of SDRAM to PCI address 0x0000_0000. Note that the 440
* strapping options do not support sizes such as 128/256 MB.
*/
out_le32((void *)PCIL0_PIM0LAL, CONFIG_SYS_SDRAM_BASE);
out_le32((void *)PCIL0_PIM0LAH, 0);
out_le32((void *)PCIL0_PIM0SA, ~(gd->ram_size - 1) | 1);
out_le32((void *)PCIL0_BAR0, 0);
/*
* Program the board's subsystem id/vendor id
*/
out_le16((void *)PCIL0_SBSYSVID, CONFIG_SYS_PCI_SUBSYS_VENDORID);
out_le16((void *)PCIL0_SBSYSID, CONFIG_SYS_PCI_SUBSYS_DEVICEID);
out_le16((void *)PCIL0_CMD, in_le16((void *)PCIL0_CMD) |
PCI_COMMAND_MEMORY);
}
#endif /* CONFIG_SYS_PCI_TARGET_INIT */
int __pci_pre_init(struct pci_controller *hose)
{
/*
* This board is always configured as the host & requires the
* PCI arbiter to be enabled.
*/
if (!pci_arbiter_enabled()) {
printf("PCI: PCI Arbiter disabled!\n");
return 0;
}
return 1;
}
#endif /* defined(CONFIG_440EP) ... */
#if defined(CONFIG_SYS_PCI_TARGET_INIT)
void pci_target_init(struct pci_controller * hose)
__attribute__((weak, alias("__pci_target_init")));
#endif /* CONFIG_SYS_PCI_TARGET_INIT */
int pci_pre_init(struct pci_controller *hose)
__attribute__((weak, alias("__pci_pre_init")));
#if defined(CONFIG_SYS_PCI_MASTER_INIT)
void __pci_master_init(struct pci_controller *hose)
{
u16 reg;
/*
* Write the PowerPC440 EP PCI Configuration regs.
* Enable PowerPC440 EP to be a master on the PCI bus (PMM).
* Enable PowerPC440 EP to act as a PCI memory target (PTM).
*/
pci_read_config_word(0, PCI_COMMAND, &reg);
pci_write_config_word(0, PCI_COMMAND, reg |
PCI_COMMAND_MASTER | PCI_COMMAND_MEMORY);
}
void pci_master_init(struct pci_controller *hose)
__attribute__((weak, alias("__pci_master_init")));
#endif /* CONFIG_SYS_PCI_MASTER_INIT */
#if defined(CONFIG_SYS_PCI_MASTER_INIT) || defined(CONFIG_SYS_PCI_TARGET_INIT)
static int pci_440_init (struct pci_controller *hose)
{
int reg_num = 0;
#ifndef CONFIG_DISABLE_PISE_TEST
/*--------------------------------------------------------------------------+
* The PCI initialization sequence enable bit must be set ... if not abort
* pci setup since updating the bit requires chip reset.
*--------------------------------------------------------------------------*/
#if defined(CONFIG_440GX) || defined(CONFIG_440SP) || defined(CONFIG_440SPE)
unsigned long strap;
mfsdr(SDR0_SDSTP1,strap);
if ((strap & SDR0_SDSTP1_PISE_MASK) == 0) {
printf("PCI: SDR0_STRP1[PISE] not set.\n");
printf("PCI: Configuration aborted.\n");
return -1;
}
#elif defined(CONFIG_440GP)
unsigned long strap;
strap = mfdcr(CPC0_STRP1);
if ((strap & CPC0_STRP1_PISE_MASK) == 0) {
printf("PCI: CPC0_STRP1[PISE] not set.\n");
printf("PCI: Configuration aborted.\n");
return -1;
}
#endif
#endif /* CONFIG_DISABLE_PISE_TEST */
/*--------------------------------------------------------------------------+
* PCI controller init
*--------------------------------------------------------------------------*/
hose->first_busno = 0;
hose->last_busno = 0;
/* PCI I/O space */
pci_set_region(hose->regions + reg_num++,
0x00000000,
PCIL0_IOBASE,
0x10000,
PCI_REGION_IO);
/* PCI memory space */
pci_set_region(hose->regions + reg_num++,
CONFIG_SYS_PCI_TARGBASE,
CONFIG_SYS_PCI_MEMBASE,
#ifdef CONFIG_SYS_PCI_MEMSIZE
CONFIG_SYS_PCI_MEMSIZE,
#else
0x10000000,
#endif
PCI_REGION_MEM );
#if defined(CONFIG_PCI_SYS_MEM_BUS) && defined(CONFIG_PCI_SYS_MEM_PHYS) && \
defined(CONFIG_PCI_SYS_MEM_SIZE)
/* System memory space */
pci_set_region(hose->regions + reg_num++,
CONFIG_PCI_SYS_MEM_BUS,
CONFIG_PCI_SYS_MEM_PHYS,
CONFIG_PCI_SYS_MEM_SIZE,
PCI_REGION_MEM | PCI_REGION_SYS_MEMORY );
#endif
hose->region_count = reg_num;
pci_setup_indirect(hose, PCIL0_CFGADR, PCIL0_CFGDATA);
/* Let board change/modify hose & do initial checks */
if (pci_pre_init(hose) == 0) {
printf("PCI: Board-specific initialization failed.\n");
printf("PCI: Configuration aborted.\n");
return -1;
}
pci_register_hose( hose );
/*--------------------------------------------------------------------------+
* PCI target init
*--------------------------------------------------------------------------*/
#if defined(CONFIG_SYS_PCI_TARGET_INIT)
pci_target_init(hose); /* Let board setup pci target */
#else
out16r( PCIL0_SBSYSVID, CONFIG_SYS_PCI_SUBSYS_VENDORID );
out16r( PCIL0_SBSYSID, CONFIG_SYS_PCI_SUBSYS_ID );
out16r( PCIL0_CLS, 0x00060000 ); /* Bridge, host bridge */
#endif
#if defined(CONFIG_440GX) || defined(CONFIG_440SPE) || \
defined(CONFIG_460EX) || defined(CONFIG_460GT)
out32r( PCIL0_BRDGOPT1, 0x04000060 ); /* PLB Rq pri highest */
out32r( PCIL0_BRDGOPT2, in32(PCIL0_BRDGOPT2) | 0x83 ); /* Enable host config, clear Timeout, ensure int src1 */
#elif defined(PCIL0_BRDGOPT1)
out32r( PCIL0_BRDGOPT1, 0x10000060 ); /* PLB Rq pri highest */
out32r( PCIL0_BRDGOPT2, in32(PCIL0_BRDGOPT2) | 1 ); /* Enable host config */
#endif
/*--------------------------------------------------------------------------+
* PCI master init: default is one 256MB region for PCI memory:
* 0x3_00000000 - 0x3_0FFFFFFF ==> CONFIG_SYS_PCI_MEMBASE
*--------------------------------------------------------------------------*/
#if defined(CONFIG_SYS_PCI_MASTER_INIT)
pci_master_init(hose); /* Let board setup pci master */
#else
out32r( PCIL0_POM0SA, 0 ); /* disable */
out32r( PCIL0_POM1SA, 0 ); /* disable */
out32r( PCIL0_POM2SA, 0 ); /* disable */
#if defined(CONFIG_440SPE)
out32r( PCIL0_POM0LAL, 0x10000000 );
out32r( PCIL0_POM0LAH, 0x0000000c );
#elif defined(CONFIG_460EX) || defined(CONFIG_460GT)
out32r( PCIL0_POM0LAL, 0x20000000 );
out32r( PCIL0_POM0LAH, 0x0000000c );
#else
out32r( PCIL0_POM0LAL, 0x00000000 );
out32r( PCIL0_POM0LAH, 0x00000003 );
#endif
out32r( PCIL0_POM0PCIAL, CONFIG_SYS_PCI_MEMBASE );
out32r( PCIL0_POM0PCIAH, 0x00000000 );
out32r( PCIL0_POM0SA, 0xf0000001 ); /* 256MB, enabled */
out32r( PCIL0_STS, in32r( PCIL0_STS ) & ~0x0000fff8 );
#endif
/*--------------------------------------------------------------------------+
* PCI host configuration -- we don't make any assumptions here ... the
* _board_must_indicate_ what to do -- there's just too many runtime
* scenarios in environments like cPCI, PPMC, etc. to make a determination
* based on hard-coded values or state of arbiter enable.
*--------------------------------------------------------------------------*/
if (is_pci_host(hose)) {
#ifdef CONFIG_PCI_SCAN_SHOW
printf("PCI: Bus Dev VenId DevId Class Int\n");
#endif
#if !defined(CONFIG_440EP) && !defined(CONFIG_440GR) && \
!defined(CONFIG_440EPX) && !defined(CONFIG_440GRX)
out16r( PCIL0_CMD, in16r( PCIL0_CMD ) | PCI_COMMAND_MASTER);
#endif
hose->last_busno = pci_hose_scan(hose);
}
return hose->last_busno;
}
#endif
void pci_init_board(void)
{
int busno = 0;
/*
* Only init PCI when either master or target functionality
* is selected.
*/
#if defined(CONFIG_SYS_PCI_MASTER_INIT) || defined(CONFIG_SYS_PCI_TARGET_INIT)
busno = pci_440_init(&ppc440_hose);
if (busno < 0)
return;
#endif
#if (defined(CONFIG_440SPE) || \
defined(CONFIG_460EX) || defined(CONFIG_460GT)) && \
!defined(CONFIG_PCI_DISABLE_PCIE)
pcie_setup_hoses(busno + 1);
#endif
}
#endif /* CONFIG_440 */
#if defined(CONFIG_405EX)
void pci_init_board(void)
{
#ifdef CONFIG_PCI_SCAN_SHOW
printf("PCI: Bus Dev VenId DevId Class Int\n");
#endif
pcie_setup_hoses(0);
}
#endif /* CONFIG_405EX */
#endif /* CONFIG_PCI */
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