diff options
author | Anton Vorontsov <avorontsov@ru.mvista.com> | 2009-01-08 01:26:19 (GMT) |
---|---|---|
committer | Kim Phillips <kim.phillips@freescale.com> | 2009-01-22 00:43:50 (GMT) |
commit | 8b34557c546e5e9f34ebf83c93413dad973d93df (patch) | |
tree | 7b63a7c89974e5f859a352e71316905225d73ab9 /board/freescale/mpc837xemds | |
parent | 8f11e34b31a7be124a3239653f33af9510502045 (diff) | |
download | u-boot-fsl-qoriq-8b34557c546e5e9f34ebf83c93413dad973d93df.tar.xz |
mpc83xx: Add PCI-E support for MPC837XEMDS boards
MPC837XEMDS boards can support PCI-E via "PCI-E riser card". The card
provides two PCI-E (x2) ports. Though, only one port can be used in x2
mode. Two ports can function simultaneously in x1 mode.
PCI-E x1/x2 modes can be switched via "pex_x2" environment variable.
Signed-off-by: Anton Vorontsov <avorontsov@ru.mvista.com>
Signed-off-by: Kim Phillips <kim.phillips@freescale.com>
Diffstat (limited to 'board/freescale/mpc837xemds')
-rw-r--r-- | board/freescale/mpc837xemds/mpc837xemds.c | 6 | ||||
-rw-r--r-- | board/freescale/mpc837xemds/pci.c | 89 | ||||
-rw-r--r-- | board/freescale/mpc837xemds/pci.h | 6 |
3 files changed, 96 insertions, 5 deletions
diff --git a/board/freescale/mpc837xemds/mpc837xemds.c b/board/freescale/mpc837xemds/mpc837xemds.c index acf8ada..156d808 100644 --- a/board/freescale/mpc837xemds/mpc837xemds.c +++ b/board/freescale/mpc837xemds/mpc837xemds.c @@ -18,6 +18,7 @@ #include <tsec.h> #include <libfdt.h> #include <fdt_support.h> +#include "pci.h" #include "../common/pq-mds-pib.h" int board_early_init_f(void) @@ -38,14 +39,10 @@ int board_early_init_f(void) case SPR_8377: fsl_setup_serdes(CONFIG_FSL_SERDES1, FSL_SERDES_PROTO_SATA, FSL_SERDES_CLK_100, FSL_SERDES_VDD_1V); - fsl_setup_serdes(CONFIG_FSL_SERDES2, FSL_SERDES_PROTO_PEX, - FSL_SERDES_CLK_100, FSL_SERDES_VDD_1V); break; case SPR_8378: fsl_setup_serdes(CONFIG_FSL_SERDES1, FSL_SERDES_PROTO_SGMII, FSL_SERDES_CLK_125, FSL_SERDES_VDD_1V); - fsl_setup_serdes(CONFIG_FSL_SERDES2, FSL_SERDES_PROTO_PEX, - FSL_SERDES_CLK_100, FSL_SERDES_VDD_1V); break; case SPR_8379: fsl_setup_serdes(CONFIG_FSL_SERDES1, FSL_SERDES_PROTO_SATA, @@ -316,6 +313,7 @@ void ft_board_setup(void *blob, bd_t *bd) ft_pci_setup(blob, bd); if (board_pci_host_broken()) ft_pci_fixup(blob, bd); + ft_pcie_fixup(blob, bd); #endif } #endif /* CONFIG_OF_BOARD_SETUP */ diff --git a/board/freescale/mpc837xemds/pci.c b/board/freescale/mpc837xemds/pci.c index df4e748..31116b3 100644 --- a/board/freescale/mpc837xemds/pci.c +++ b/board/freescale/mpc837xemds/pci.c @@ -16,7 +16,9 @@ #include <mpc83xx.h> #include <pci.h> #include <i2c.h> +#include <fdt_support.h> #include <asm/fsl_i2c.h> +#include <asm/fsl_serdes.h> #if defined(CONFIG_PCI) static struct pci_region pci_regions[] = { @@ -40,15 +42,59 @@ static struct pci_region pci_regions[] = { } }; +static struct pci_region pcie_regions_0[] = { + { + .bus_start = CONFIG_SYS_PCIE1_MEM_BASE, + .phys_start = CONFIG_SYS_PCIE1_MEM_PHYS, + .size = CONFIG_SYS_PCIE1_MEM_SIZE, + .flags = PCI_REGION_MEM, + }, + { + .bus_start = CONFIG_SYS_PCIE1_IO_BASE, + .phys_start = CONFIG_SYS_PCIE1_IO_PHYS, + .size = CONFIG_SYS_PCIE1_IO_SIZE, + .flags = PCI_REGION_IO, + }, +}; + +static struct pci_region pcie_regions_1[] = { + { + .bus_start = CONFIG_SYS_PCIE2_MEM_BASE, + .phys_start = CONFIG_SYS_PCIE2_MEM_PHYS, + .size = CONFIG_SYS_PCIE2_MEM_SIZE, + .flags = PCI_REGION_MEM, + }, + { + .bus_start = CONFIG_SYS_PCIE2_IO_BASE, + .phys_start = CONFIG_SYS_PCIE2_IO_PHYS, + .size = CONFIG_SYS_PCIE2_IO_SIZE, + .flags = PCI_REGION_IO, + }, +}; + +static int is_pex_x2(void) +{ + const char *pex_x2 = getenv("pex_x2"); + + if (pex_x2 && !strcmp(pex_x2, "yes")) + return 1; + return 0; +} + void pci_init_board(void) { volatile immap_t *immr = (volatile immap_t *)CONFIG_SYS_IMMR; + volatile sysconf83xx_t *sysconf = &immr->sysconf; volatile clk83xx_t *clk = (volatile clk83xx_t *)&immr->clk; volatile law83xx_t *pci_law = immr->sysconf.pcilaw; + volatile law83xx_t *pcie_law = sysconf->pcielaw; struct pci_region *reg[] = { pci_regions }; + struct pci_region *pcie_reg[] = { pcie_regions_0, pcie_regions_1, }; + u32 spridr = in_be32(&immr->sysconf.spridr); + int pex2 = is_pex_x2(); if (board_pci_host_broken()) - return; + goto skip_pci; /* Enable all 5 PCI_CLK_OUTPUTS */ clk->occr |= 0xf8000000; @@ -64,5 +110,46 @@ void pci_init_board(void) udelay(2000); mpc83xx_pci_init(1, reg, 0); +skip_pci: + /* There is no PEX in MPC8379 parts. */ + if (PARTID_NO_E(spridr) == SPR_8379) + return; + + /* Configure the clock for PCIE controller */ + clrsetbits_be32(&clk->sccr, SCCR_PCIEXP1CM | SCCR_PCIEXP2CM, + SCCR_PCIEXP1CM_1 | SCCR_PCIEXP2CM_1); + + /* Deassert the resets in the control register */ + out_be32(&sysconf->pecr1, 0xE0008000); + if (!pex2) + out_be32(&sysconf->pecr2, 0xE0008000); + udelay(2000); + + /* Configure PCI Express Local Access Windows */ + out_be32(&pcie_law[0].bar, CONFIG_SYS_PCIE1_BASE & LAWBAR_BAR); + out_be32(&pcie_law[0].ar, LBLAWAR_EN | LBLAWAR_512MB); + + out_be32(&pcie_law[1].bar, CONFIG_SYS_PCIE2_BASE & LAWBAR_BAR); + out_be32(&pcie_law[1].ar, LBLAWAR_EN | LBLAWAR_512MB); + + if (pex2) + fsl_setup_serdes(CONFIG_FSL_SERDES2, FSL_SERDES_PROTO_PEX_X2, + FSL_SERDES_CLK_100, FSL_SERDES_VDD_1V); + else + fsl_setup_serdes(CONFIG_FSL_SERDES2, FSL_SERDES_PROTO_PEX, + FSL_SERDES_CLK_100, FSL_SERDES_VDD_1V); + + mpc83xx_pcie_init(pex2 ? 1 : 2, pcie_reg, 0); +} + +void ft_pcie_fixup(void *blob, bd_t *bd) +{ + const char *status = "disabled (PCIE1 is x2)"; + + if (!is_pex_x2()) + return; + + do_fixup_by_path(blob, "pci2", "status", status, + strlen(status) + 1, 1); } #endif /* CONFIG_PCI */ diff --git a/board/freescale/mpc837xemds/pci.h b/board/freescale/mpc837xemds/pci.h new file mode 100644 index 0000000..fd7a916 --- /dev/null +++ b/board/freescale/mpc837xemds/pci.h @@ -0,0 +1,6 @@ +#ifndef __BOARD_MPC837XEMDS_PCI_H +#define __BOARD_MPC837XEMDS_PCI_H + +extern void ft_pcie_fixup(void *blob, bd_t *bd); + +#endif /* __BOARD_MPC837XEMDS_PCI_H */ |