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[PPC440SPe] Improve PCIe configuration space access

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- correct configuration space mapping
- correct bus numbering
- better access to config space

Prior to this patch, the 440SPe host/PCIe bridge was able to configure only the
first device on the first bus. We now allow to configure up to 16 buses;
also, scanning for devices behind the PCIe-PCIe bridge is supported, so
peripheral devices farther in hierarchy can be identified.

Signed-off-by: Grzegorz Bernacki <gjb@semihalf.com>
This commit is contained in:
Grzegorz Bernacki 2007-09-07 18:20:23 +02:00 committed by Rafal Jaworowski
parent 15ee4734e4
commit 7f19139389
9 changed files with 130 additions and 62 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

12
board/amcc/katmai/init.S
View File

@ -67,9 +67,9 @@ tlbtabA:
tlbentry(CFG_PCIE_MEMBASE, SZ_256M, 0xB0000000, 0xD, AC_R|AC_W|SA_G|SA_I)
tlbentry(CFG_PCIE_BASE, SZ_16K, 0x20000000, 0xC, AC_R|AC_W|SA_G|SA_I)
tlbentry(CFG_PCIE0_CFGBASE, SZ_1K, 0x40000000, 0xC, AC_R|AC_W|SA_G|SA_I)
tlbentry(CFG_PCIE1_CFGBASE, SZ_1K, 0x80000000, 0xC, AC_R|AC_W|SA_G|SA_I)
tlbentry(CFG_PCIE2_CFGBASE, SZ_1K, 0xC0000000, 0xC, AC_R|AC_W|SA_G|SA_I)
tlbentry(CFG_PCIE0_CFGBASE, SZ_16M, 0x40000000, 0xC, AC_R|AC_W|SA_G|SA_I)
tlbentry(CFG_PCIE1_CFGBASE, SZ_16M, 0x80000000, 0xC, AC_R|AC_W|SA_G|SA_I)
tlbentry(CFG_PCIE2_CFGBASE, SZ_16M, 0xC0000000, 0xC, AC_R|AC_W|SA_G|SA_I)
tlbentry(CFG_PCIE0_XCFGBASE, SZ_1K, 0x50000000, 0xC, AC_R|AC_W|SA_G|SA_I)
tlbentry(CFG_PCIE1_XCFGBASE, SZ_1K, 0x90000000, 0xC, AC_R|AC_W|SA_G|SA_I)
tlbentry(CFG_PCIE2_XCFGBASE, SZ_1K, 0xD0000000, 0xC, AC_R|AC_W|SA_G|SA_I)
@ -109,9 +109,9 @@ tlbtabB:
tlbentry(CFG_PCI_MEMBASE, SZ_256M, 0x10000000, 0xC, AC_R|AC_W|SA_G|SA_I)
tlbentry(CFG_PCIE_MEMBASE, SZ_256M, 0xB0000000, 0xD, AC_R|AC_W|SA_G|SA_I)
tlbentry(CFG_PCIE0_CFGBASE, SZ_1K, 0x00100000, 0xD, AC_R|AC_W|SA_G|SA_I)
tlbentry(CFG_PCIE1_CFGBASE, SZ_1K, 0x20100000, 0xD, AC_R|AC_W|SA_G|SA_I)
tlbentry(CFG_PCIE2_CFGBASE, SZ_1K, 0x40100000, 0xD, AC_R|AC_W|SA_G|SA_I)
tlbentry(CFG_PCIE0_CFGBASE, SZ_16M, 0x00000000, 0xD, AC_R|AC_W|SA_G|SA_I)
tlbentry(CFG_PCIE1_CFGBASE, SZ_16M, 0x20000000, 0xD, AC_R|AC_W|SA_G|SA_I)
tlbentry(CFG_PCIE2_CFGBASE, SZ_16M, 0x40000000, 0xD, AC_R|AC_W|SA_G|SA_I)
tlbentry(CFG_PCIE0_XCFGBASE, SZ_1K, 0x10000000, 0xD, AC_R|AC_W|SA_G|SA_I)
tlbentry(CFG_PCIE1_XCFGBASE, SZ_1K, 0x30000000, 0xD, AC_R|AC_W|SA_G|SA_I)
tlbentry(CFG_PCIE2_XCFGBASE, SZ_1K, 0x50000000, 0xD, AC_R|AC_W|SA_G|SA_I)

9
board/amcc/katmai/katmai.c
View File

@ -392,7 +392,7 @@ int katmai_pcie_card_present(int port)
static struct pci_controller pcie_hose[3] = {{0},{0},{0}};
void pcie_setup_hoses(void)
void pcie_setup_hoses(int busno)
{
struct pci_controller *hose;
int i, bus;
@ -401,7 +401,7 @@ void pcie_setup_hoses(void)
* assume we're called after the PCIX hose is initialized, which takes
* bus ID 0 and therefore start numbering PCIe's from 1.
*/
bus = 1;
bus = busno;
for (i = 0; i <= 2; i++) {
/* Check for katmai card presence */
if (!katmai_pcie_card_present(i))
@ -418,8 +418,8 @@ void pcie_setup_hoses(void)
hose = &pcie_hose[i];
hose->first_busno = bus;
hose->last_busno = bus;
bus++;
hose->last_busno = bus;
hose->current_busno = bus;
/* setup mem resource */
pci_set_region(hose->regions + 0,
@ -443,6 +443,7 @@ void pcie_setup_hoses(void)
* Config access can only go down stream
*/
hose->last_busno = pci_hose_scan(hose);
bus = hose->last_busno + 1;
#endif
}
}

12
board/amcc/yucca/init.S
View File

@ -70,9 +70,9 @@ tlbtabA:
tlbentry(CFG_PCIE_MEMBASE, SZ_256M, 0xB0000000, 0xD, AC_R|AC_W|SA_G|SA_I)
tlbentry(CFG_PCIE_BASE, SZ_16K, 0x20000000, 0xC, AC_R|AC_W|SA_G|SA_I)
tlbentry(CFG_PCIE0_CFGBASE, SZ_1K, 0x40000000, 0xC, AC_R|AC_W|SA_G|SA_I)
tlbentry(CFG_PCIE1_CFGBASE, SZ_1K, 0x80000000, 0xC, AC_R|AC_W|SA_G|SA_I)
tlbentry(CFG_PCIE2_CFGBASE, SZ_1K, 0xC0000000, 0xC, AC_R|AC_W|SA_G|SA_I)
tlbentry(CFG_PCIE0_CFGBASE, SZ_16M, 0x40000000, 0xC, AC_R|AC_W|SA_G|SA_I)
tlbentry(CFG_PCIE1_CFGBASE, SZ_16M, 0x80000000, 0xC, AC_R|AC_W|SA_G|SA_I)
tlbentry(CFG_PCIE2_CFGBASE, SZ_16M, 0xC0000000, 0xC, AC_R|AC_W|SA_G|SA_I)
tlbentry(CFG_PCIE0_XCFGBASE, SZ_1K, 0x50000000, 0xC, AC_R|AC_W|SA_G|SA_I)
tlbentry(CFG_PCIE1_XCFGBASE, SZ_1K, 0x90000000, 0xC, AC_R|AC_W|SA_G|SA_I)
tlbentry(CFG_PCIE2_XCFGBASE, SZ_1K, 0xD0000000, 0xC, AC_R|AC_W|SA_G|SA_I)
@ -112,9 +112,9 @@ tlbtabB:
tlbentry(CFG_PCI_MEMBASE, SZ_256M, 0x10000000, 0xC, AC_R|AC_W|SA_G|SA_I)
tlbentry(CFG_PCIE_MEMBASE, SZ_256M, 0xB0000000, 0xD, AC_R|AC_W|SA_G|SA_I)
tlbentry(CFG_PCIE0_CFGBASE, SZ_1K, 0x00100000, 0xD, AC_R|AC_W|SA_G|SA_I)
tlbentry(CFG_PCIE1_CFGBASE, SZ_1K, 0x20100000, 0xD, AC_R|AC_W|SA_G|SA_I)
tlbentry(CFG_PCIE2_CFGBASE, SZ_1K, 0x40100000, 0xD, AC_R|AC_W|SA_G|SA_I)
tlbentry(CFG_PCIE0_CFGBASE, SZ_16M, 0x00000000, 0xD, AC_R|AC_W|SA_G|SA_I)
tlbentry(CFG_PCIE1_CFGBASE, SZ_16M, 0x20000000, 0xD, AC_R|AC_W|SA_G|SA_I)
tlbentry(CFG_PCIE2_CFGBASE, SZ_16M, 0x40000000, 0xD, AC_R|AC_W|SA_G|SA_I)
tlbentry(CFG_PCIE0_XCFGBASE, SZ_1K, 0x10000000, 0xD, AC_R|AC_W|SA_G|SA_I)
tlbentry(CFG_PCIE1_XCFGBASE, SZ_1K, 0x30000000, 0xD, AC_R|AC_W|SA_G|SA_I)
tlbentry(CFG_PCIE2_XCFGBASE, SZ_1K, 0x50000000, 0xD, AC_R|AC_W|SA_G|SA_I)

9
board/amcc/yucca/yucca.c
View File

@ -846,7 +846,7 @@ void yucca_setup_pcie_fpga_endpoint(int port)
static struct pci_controller pcie_hose[3] = {{0},{0},{0}};
void pcie_setup_hoses(void)
void pcie_setup_hoses(int busno)
{
struct pci_controller *hose;
int i, bus;
@ -855,7 +855,7 @@ void pcie_setup_hoses(void)
* assume we're called after the PCIX hose is initialized, which takes
* bus ID 0 and therefore start numbering PCIe's from 1.
*/
bus = 1;
bus = busno;
for (i = 0; i <= 2; i++) {
/* Check for yucca card presence */
if (!yucca_pcie_card_present(i))
@ -874,8 +874,8 @@ void pcie_setup_hoses(void)
hose = &pcie_hose[i];
hose->first_busno = bus;
hose->last_busno = bus;
bus++;
hose->last_busno = bus;
hose->current_busno = bus;
/* setup mem resource */
pci_set_region(hose->regions + 0,
@ -899,6 +899,7 @@ void pcie_setup_hoses(void)
* Config access can only go down stream
*/
hose->last_busno = pci_hose_scan(hose);
bus = hose->last_busno + 1;
#endif
}
}

17
cpu/ppc4xx/405gp_pci.c
View File

@ -443,7 +443,7 @@ void pci_init_board(void)
static struct pci_controller ppc440_hose = {0};
void pci_440_init (struct pci_controller *hose)
int pci_440_init (struct pci_controller *hose)
{
int reg_num = 0;
@ -459,7 +459,7 @@ void pci_440_init (struct pci_controller *hose)
if ((strap & SDR0_SDSTP1_PISE_MASK) == 0) {
printf("PCI: SDR0_STRP1[PISE] not set.\n");
printf("PCI: Configuration aborted.\n");
return;
return -1;
}
#elif defined(CONFIG_440GP)
unsigned long strap;
@ -468,7 +468,7 @@ void pci_440_init (struct pci_controller *hose)
if ((strap & CPC0_STRP1_PISE_MASK) == 0) {
printf("PCI: CPC0_STRP1[PISE] not set.\n");
printf("PCI: Configuration aborted.\n");
return;
return -1;
}
#endif
#endif /* CONFIG_DISABLE_PISE_TEST */
@ -477,7 +477,7 @@ void pci_440_init (struct pci_controller *hose)
* PCI controller init
*--------------------------------------------------------------------------*/
hose->first_busno = 0;
hose->last_busno = 0xff;
hose->last_busno = 0;
/* PCI I/O space */
pci_set_region(hose->regions + reg_num++,
@ -515,7 +515,7 @@ void pci_440_init (struct pci_controller *hose)
if (pci_pre_init (hose) == 0) {
printf("PCI: Board-specific initialization failed.\n");
printf("PCI: Configuration aborted.\n");
return;
return -1;
}
pci_register_hose( hose );
@ -578,13 +578,16 @@ void pci_440_init (struct pci_controller *hose)
#endif
hose->last_busno = pci_hose_scan(hose);
}
return hose->last_busno;
}
void pci_init_board(void)
{
pci_440_init (&ppc440_hose);
int busno;
busno = pci_440_init (&ppc440_hose);
#if defined(CONFIG_440SPE)
pcie_setup_hoses();
pcie_setup_hoses(busno + 1);
#endif
}

111
cpu/ppc4xx/440spe_pcie.c
View File

@ -40,6 +40,23 @@ enum {
LNKW_X8 = 0x8
};
static u8* pcie_get_base(struct pci_controller *hose, unsigned int devfn)
{
u8 *base = (u8*)hose->cfg_data;
/* use local configuration space for the first bus */
if (PCI_BUS(devfn) == 0) {
if (hose->cfg_data == (u8*)CFG_PCIE0_CFGBASE)
base = (u8*)CFG_PCIE0_XCFGBASE;
if (hose->cfg_data == (u8*)CFG_PCIE1_CFGBASE)
base = (u8*)CFG_PCIE1_XCFGBASE;
if (hose->cfg_data == (u8*)CFG_PCIE2_CFGBASE)
base = (u8*)CFG_PCIE2_XCFGBASE;
}
return base;
}
static void pcie_dmer_disable(void)
{
mtdcr (DCRN_PEGPL_CFG(DCRN_PCIE0_BASE),
@ -60,18 +77,35 @@ static void pcie_dmer_enable(void)
mfdcr (DCRN_PEGPL_CFG(DCRN_PCIE2_BASE)) & ~GPL_DMER_MASK_DISA);
}
static int pcie_read_config(struct pci_controller *hose, unsigned int devfn,
int offset, int len, u32 *val) {
u8 *address;
*val = 0;
/*
* 440SPE implements only one function per port
* Bus numbers are relative to hose->first_busno
*/
if (!((PCI_FUNC(devfn) == 0) && (PCI_DEV(devfn) == 1)))
devfn -= PCI_BDF(hose->first_busno, 0, 0);
/*
* NOTICE: configuration space ranges are currenlty mapped only for
* the first 16 buses, so such limit must be imposed. In case more
* buses are required the TLB settings in board/amcc/<board>/init.S
* need to be altered accordingly (one bus takes 1 MB of memory space).
*/
if (PCI_BUS(devfn) >= 16)
return 0;
devfn = PCI_BDF(0,0,0);
/*
* Only single device/single function is supported for the primary and
* secondary buses of the 440SPe host bridge.
*/
if ((!((PCI_FUNC(devfn) == 0) && (PCI_DEV(devfn) == 0))) &&
((PCI_BUS(devfn) == 0) || (PCI_BUS(devfn) == 1)))
return 0;
address = pcie_get_base(hose, devfn);
offset += devfn << 4;
/*
@ -101,13 +135,24 @@ static int pcie_read_config(struct pci_controller *hose, unsigned int devfn,
static int pcie_write_config(struct pci_controller *hose, unsigned int devfn,
int offset, int len, u32 val) {
u8 *address;
/*
* 440SPE implements only one function per port
* Bus numbers are relative to hose->first_busno
*/
if (!((PCI_FUNC(devfn) == 0) && (PCI_DEV(devfn) == 1)))
devfn -= PCI_BDF(hose->first_busno, 0, 0);
/*
* Same constraints as in pcie_read_config().
*/
if (PCI_BUS(devfn) >= 16)
return 0;
devfn = PCI_BDF(0,0,0);
if ((!((PCI_FUNC(devfn) == 0) && (PCI_DEV(devfn) == 0))) &&
((PCI_BUS(devfn) == 0) || (PCI_BUS(devfn) == 1)))
return 0;
address = pcie_get_base(hose, devfn);
offset += devfn << 4;
/*
@ -137,7 +182,7 @@ int pcie_read_config_byte(struct pci_controller *hose,pci_dev_t dev,int offset,u
u32 v;
int rv;
rv = pcie_read_config(hose, dev, offset, 1, &v);
rv = pcie_read_config(hose, dev, offset, 1, &v);
*val = (u8)v;
return rv;
}
@ -794,12 +839,12 @@ void ppc440spe_setup_pcie_rootpoint(struct pci_controller *hose, int port)
volatile void *rmbase = NULL;
pci_set_ops(hose,
pcie_read_config_byte,
pcie_read_config_word,
pcie_read_config_dword,
pcie_write_config_byte,
pcie_write_config_word,
pcie_write_config_dword);
pcie_read_config_byte,
pcie_read_config_word,
pcie_read_config_dword,
pcie_write_config_byte,
pcie_write_config_word,
pcie_write_config_dword);
switch (port) {
case 0:
@ -822,14 +867,9 @@ void ppc440spe_setup_pcie_rootpoint(struct pci_controller *hose, int port)
/*
* Set bus numbers on our root port
*/
if (ppc440spe_revB()) {
out_8((u8 *)mbase + PCI_PRIMARY_BUS, 0);
out_8((u8 *)mbase + PCI_SECONDARY_BUS, 1);
out_8((u8 *)mbase + PCI_SUBORDINATE_BUS, 1);
} else {
out_8((u8 *)mbase + PCI_PRIMARY_BUS, 0);
out_8((u8 *)mbase + PCI_SECONDARY_BUS, 0);
}
out_8((u8 *)mbase + PCI_PRIMARY_BUS, 0);
out_8((u8 *)mbase + PCI_SECONDARY_BUS, 1);
out_8((u8 *)mbase + PCI_SUBORDINATE_BUS, 1);
/*
* Set up outbound translation to hose->mem_space from PLB
@ -886,6 +926,29 @@ void ppc440spe_setup_pcie_rootpoint(struct pci_controller *hose, int port)
in_le16((u16 *)(mbase + PCI_COMMAND)) |
PCI_COMMAND_IO | PCI_COMMAND_MEMORY | PCI_COMMAND_MASTER);
printf("PCIE:%d successfully set as rootpoint\n",port);
/* Set Device and Vendor Id */
switch (port) {
case 0:
out_le16(mbase + 0x200, 0xaaa0);
out_le16(mbase + 0x202, 0xbed0);
break;
case 1:
out_le16(mbase + 0x200, 0xaaa1);
out_le16(mbase + 0x202, 0xbed1);
break;
case 2:
out_le16(mbase + 0x200, 0xaaa2);
out_le16(mbase + 0x202, 0xbed2);
break;
default:
out_le16(mbase + 0x200, 0xaaa3);
out_le16(mbase + 0x202, 0xbed3);
}
/* Set Class Code to PCI-PCI bridge and Revision Id to 1 */
out_le32(mbase + 0x208, 0x06040001);
}
int ppc440spe_setup_pcie_endpoint(struct pci_controller *hose, int port)
@ -963,8 +1026,8 @@ int ppc440spe_setup_pcie_endpoint(struct pci_controller *hose, int port)
/* Enable I/O, Mem, and Busmaster cycles */
out_le16((u16 *)(mbase + PCI_COMMAND),
in_le16((u16 *)(mbase + PCI_COMMAND)) |
PCI_COMMAND_IO | PCI_COMMAND_MEMORY | PCI_COMMAND_MASTER);
in_le16((u16 *)(mbase + PCI_COMMAND)) |
PCI_COMMAND_IO | PCI_COMMAND_MEMORY | PCI_COMMAND_MASTER);
out_le16(mbase + 0x200,0xcaad); /* Setting vendor ID */
out_le16(mbase + 0x202,0xfeed); /* Setting device ID */
attempts = 10;

2
include/common.h
View File

@ -275,7 +275,7 @@ void pciinfo (int, int);
# endif
int is_pci_host (struct pci_controller *);
#if defined(CONFIG_440SPE)
void pcie_setup_hoses(void);
void pcie_setup_hoses(int busno);
#endif
#endif

10
include/configs/katmai.h
View File

@ -66,11 +66,11 @@
#define CFG_PCIE_BASE 0xe0000000 /* PCIe UTL regs */
#define CFG_PCIE0_CFGBASE 0xc0000000
#define CFG_PCIE0_XCFGBASE 0xc0000400
#define CFG_PCIE1_CFGBASE 0xc0001000
#define CFG_PCIE1_XCFGBASE 0xc0001400
#define CFG_PCIE2_CFGBASE 0xc0002000
#define CFG_PCIE2_XCFGBASE 0xc0002400
#define CFG_PCIE1_CFGBASE 0xc1000000
#define CFG_PCIE2_CFGBASE 0xc2000000
#define CFG_PCIE0_XCFGBASE 0xc3000000
#define CFG_PCIE1_XCFGBASE 0xc3001000
#define CFG_PCIE2_XCFGBASE 0xc3002000
/* System RAM mapped to PCI space */
#define CONFIG_PCI_SYS_MEM_BUS CFG_SDRAM_BASE

10
include/configs/yucca.h
View File

@ -68,11 +68,11 @@
#define CFG_PCIE_BASE 0xe0000000 /* PCIe UTL regs */
#define CFG_PCIE0_CFGBASE 0xc0000000
#define CFG_PCIE0_XCFGBASE 0xc0000400
#define CFG_PCIE1_CFGBASE 0xc0001000
#define CFG_PCIE1_XCFGBASE 0xc0001400
#define CFG_PCIE2_CFGBASE 0xc0002000
#define CFG_PCIE2_XCFGBASE 0xc0002400
#define CFG_PCIE1_CFGBASE 0xc1000000
#define CFG_PCIE2_CFGBASE 0xc2000000
#define CFG_PCIE0_XCFGBASE 0xc3000000
#define CFG_PCIE1_XCFGBASE 0xc3001000
#define CFG_PCIE2_XCFGBASE 0xc3002000
/* System RAM mapped to PCI space */
#define CONFIG_PCI_SYS_MEM_BUS CFG_SDRAM_BASE