Add the ability for the MPC8349EMDS to run in PCI Agent mode, acting as a PCI card rather than a host computer.
Signed-off-by: Ira W. Snyder iws@ovro.caltech.edu --- board/freescale/mpc8349emds/mpc8349emds.c | 9 +++++ board/freescale/mpc8349emds/pci.c | 49 +++++++++++++++++++++++++++++ include/configs/MPC8349EMDS.h | 22 ++++++++++++- 3 files changed, 79 insertions(+), 1 deletions(-)
diff --git a/board/freescale/mpc8349emds/mpc8349emds.c b/board/freescale/mpc8349emds/mpc8349emds.c index 9a312c3..4c04f2c 100644 --- a/board/freescale/mpc8349emds/mpc8349emds.c +++ b/board/freescale/mpc8349emds/mpc8349emds.c @@ -165,6 +165,15 @@ int fixed_sdram(void)
int checkboard (void) { + /* + * Warning: do not read the BCSR registers here + * + * There is a timing bug in the 8349E and 8349EA BCSR code + * version 1.2 (read from BCSR 11) that will cause the CFI + * flash initialization code to overwrite BCSR 0, disabling + * the serial ports and gigabit ethernet + */ + puts("Board: Freescale MPC8349EMDS\n"); return 0; } diff --git a/board/freescale/mpc8349emds/pci.c b/board/freescale/mpc8349emds/pci.c index a783beb..9c19e30 100644 --- a/board/freescale/mpc8349emds/pci.c +++ b/board/freescale/mpc8349emds/pci.c @@ -75,6 +75,7 @@ static struct pci_region pci2_regions[] = { }; #endif
+#ifndef CONFIG_PCISLAVE void pib_init(void) { u8 val8, orig_i2c_bus; @@ -166,4 +167,52 @@ void pci_init_board(void) #endif }
+#else +void pci_init_board(void) +{ + volatile immap_t *immr = (volatile immap_t *)CFG_IMMR; + volatile clk83xx_t *clk = (volatile clk83xx_t *)&immr->clk; + volatile law83xx_t *pci_law = immr->sysconf.pcilaw; + volatile pcictrl83xx_t *pci_ctrl = &immr->pci_ctrl[0]; + struct pci_region *reg[] = { pci1_regions }; + + /* Enable all 8 PCI_CLK_OUTPUTS */ + clk->occr = 0xff000000; + udelay(2000); + + /* Configure PCI Local Access Windows */ + pci_law[0].bar = CFG_PCI1_MEM_PHYS & LAWBAR_BAR; + pci_law[0].ar = LAWAR_EN | LAWAR_SIZE_1G; + + pci_law[1].bar = CFG_PCI1_IO_PHYS & LAWBAR_BAR; + pci_law[1].ar = LAWAR_EN | LAWAR_SIZE_4M; + + udelay(2000); + + mpc83xx_pci_init(1, reg, 0); + + /* Configure PCI Inbound Translation Windows (3 1MB windows) */ + pci_ctrl->pitar0 = 0x0; + pci_ctrl->pibar0 = 0x0; + pci_ctrl->piwar0 = PIWAR_EN | PIWAR_PF | PIWAR_RTT_SNOOP | + PIWAR_WTT_SNOOP | PIWAR_IWS_1M; + + pci_ctrl->pitar1 = 0x0; + pci_ctrl->pibar1 = 0x0; + pci_ctrl->piebar1 = 0x0; + pci_ctrl->piwar1 = PIWAR_EN | PIWAR_PF | PIWAR_RTT_SNOOP | + PIWAR_WTT_SNOOP | PIWAR_IWS_1M; + + pci_ctrl->pitar2 = 0x0; + pci_ctrl->pibar2 = 0x0; + pci_ctrl->piebar2 = 0x0; + pci_ctrl->piwar2 = PIWAR_EN | PIWAR_PF | PIWAR_RTT_SNOOP | + PIWAR_WTT_SNOOP | PIWAR_IWS_1M; + + /* Unlock the configuration bit */ + mpc83xx_pcislave_unlock(0); + printf("PCI: Agent mode enabled\n"); +} +#endif /* CONFIG_PCISLAVE */ + #endif /* CONFIG_PCI */ diff --git a/include/configs/MPC8349EMDS.h b/include/configs/MPC8349EMDS.h index d659a15..c8870b5 100644 --- a/include/configs/MPC8349EMDS.h +++ b/include/configs/MPC8349EMDS.h @@ -48,6 +48,11 @@ #define CONFIG_83XX_CLKIN 33000000 /* in Hz */ #endif
+#ifdef CONFIG_PCISLAVE +#define CONFIG_PCI +#define CONFIG_83XX_PCICLK 66666666 /* in Hz */ +#endif /* CONFIG_PCISLAVE */ + #ifndef CONFIG_SYS_CLK_FREQ #ifdef PCI_66M #define CONFIG_SYS_CLK_FREQ 66000000 @@ -575,6 +580,20 @@ HRCWL_CORE_TO_CSB_1X1) #endif
+#ifdef CONFIG_PCISLAVE +#define CFG_HRCW_HIGH (\ + HRCWH_PCI_AGENT |\ + HRCWH_64_BIT_PCI |\ + HRCWH_PCI1_ARBITER_DISABLE |\ + HRCWH_PCI2_ARBITER_DISABLE |\ + HRCWH_CORE_ENABLE |\ + HRCWH_FROM_0X00000100 |\ + HRCWH_BOOTSEQ_DISABLE |\ + HRCWH_SW_WATCHDOG_DISABLE |\ + HRCWH_ROM_LOC_LOCAL_16BIT |\ + HRCWH_TSEC1M_IN_GMII |\ + HRCWH_TSEC2M_IN_GMII ) +#else #if defined(PCI_64BIT) #define CFG_HRCW_HIGH (\ HRCWH_PCI_HOST |\ @@ -601,7 +620,8 @@ HRCWH_ROM_LOC_LOCAL_16BIT |\ HRCWH_TSEC1M_IN_GMII |\ HRCWH_TSEC2M_IN_GMII ) -#endif +#endif /* PCI_64BIT */ +#endif /* CONFIG_PCISLAVE */
/* * System performance