Commit fd6646c0 authored by Anton Vorontsov's avatar Anton Vorontsov Committed by Kim Phillips
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mpc83xx: Add support for MPC83xx PCI-E controllers

This patch adds support for MPC83xx PCI-E controllers in Root Complex
mode.

The patch is based on Tony Li and Dave Liu work[1].

Though unlike the original patch, by default we don't register PCI-E
buses for use in U-Boot, we only configure the controllers for future
use in other OSes (Linux). This is done because we don't have enough
of spare BATs to map all the PCI-E regions.

To actually use PCI-E in U-Boot, users should explicitly define
CONFIG_83XX_GENERIC_PCIE_REGISTER_HOSES symbol in the board file. And
only then U-Boot will able to access PCI-E, but at the cost of disabled
address translation.

[1] http://lists.denx.de/pipermail/u-boot/2008-January/027630.html

Signed-off-by: default avatarTony Li <tony.li@freescale.com>
Signed-off-by: default avatarAnton Vorontsov <avorontsov@ru.mvista.com>
Acked-by: default avatarDave Liu <daveliu@freescale.com>
Signed-off-by: default avatarKim Phillips <kim.phillips@freescale.com>
parent 88ecf55c
......@@ -39,6 +39,7 @@ COBJS-y += ecc.o
COBJS-$(CONFIG_QE) += qe_io.o
COBJS-$(CONFIG_FSL_SERDES) += serdes.o
COBJS-$(CONFIG_83XX_GENERIC_PCI) += pci.o
COBJS-$(CONFIG_83XX_GENERIC_PCIE) += pcie.o
COBJS-$(CONFIG_OF_LIBFDT) += fdt.o
COBJS := $(COBJS-y)
......
/*
* Copyright (C) 2007-2009 Freescale Semiconductor, Inc.
* Copyright (C) 2008-2009 MontaVista Software, Inc.
*
* Authors: Tony Li <tony.li@freescale.com>
* Anton Vorontsov <avorontsov@ru.mvista.com>
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License as
* published by the Free Software Foundation; either version 2 of
* the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
* MA 02111-1307 USA
*/
#include <common.h>
#include <pci.h>
#include <mpc83xx.h>
#include <asm/io.h>
DECLARE_GLOBAL_DATA_PTR;
#define PCIE_MAX_BUSES 2
#ifdef CONFIG_83XX_GENERIC_PCIE_REGISTER_HOSES
static int mpc83xx_pcie_remap_cfg(struct pci_controller *hose, pci_dev_t dev)
{
int bus = PCI_BUS(dev) - hose->first_busno;
immap_t *immr = (immap_t *)CONFIG_SYS_IMMR;
pex83xx_t *pex = &immr->pciexp[bus];
struct pex_outbound_window *out_win = &pex->bridge.pex_outbound_win[0];
u8 devfn = PCI_DEV(dev) << 3 | PCI_FUNC(dev);
u32 dev_base = bus << 24 | devfn << 16;
if (hose->indirect_type == INDIRECT_TYPE_NO_PCIE_LINK)
return -1;
/*
* Workaround for the HW bug: for Type 0 configure transactions the
* PCI-E controller does not check the device number bits and just
* assumes that the device number bits are 0.
*/
if (devfn & 0xf8)
return -1;
out_le32(&out_win->tarl, dev_base);
return 0;
}
#define cfg_read(val, addr, type, op) \
do { *val = op((type)(addr)); } while (0)
#define cfg_write(val, addr, type, op) \
do { op((type *)(addr), (val)); } while (0)
#define PCIE_OP(rw, size, type, op) \
static int pcie_##rw##_config_##size(struct pci_controller *hose, \
pci_dev_t dev, int offset, \
type val) \
{ \
int ret; \
\
ret = mpc83xx_pcie_remap_cfg(hose, dev); \
if (ret) \
return ret; \
cfg_##rw(val, (void *)hose->cfg_addr + offset, type, op); \
return 0; \
}
PCIE_OP(read, byte, u8 *, in_8)
PCIE_OP(read, word, u16 *, in_le16)
PCIE_OP(read, dword, u32 *, in_le32)
PCIE_OP(write, byte, u8, out_8)
PCIE_OP(write, word, u16, out_le16)
PCIE_OP(write, dword, u32, out_le32)
static void mpc83xx_pcie_register_hose(int bus, struct pci_region *reg,
u8 link)
{
extern void disable_addr_trans(void); /* start.S */
static struct pci_controller pcie_hose[PCIE_MAX_BUSES];
static int max_bus;
struct pci_controller *hose = &pcie_hose[bus];
int i;
/*
* There are no spare BATs to remap all PCI-E windows for U-Boot, so
* disable translations. In general, this is not great solution, and
* that's why we don't register PCI-E hoses by default.
*/
disable_addr_trans();
for (i = 0; i < 2; i++, reg++) {
if (reg->size == 0)
break;
hose->regions[i] = *reg;
hose->region_count++;
}
i = hose->region_count++;
hose->regions[i].bus_start = 0;
hose->regions[i].phys_start = 0;
hose->regions[i].size = gd->ram_size;
hose->regions[i].flags = PCI_REGION_MEM | PCI_REGION_MEMORY;
i = hose->region_count++;
hose->regions[i].bus_start = CONFIG_SYS_IMMR;
hose->regions[i].phys_start = CONFIG_SYS_IMMR;
hose->regions[i].size = 0x100000;
hose->regions[i].flags = PCI_REGION_MEM | PCI_REGION_MEMORY;
hose->first_busno = max_bus;
hose->last_busno = 0xff;
if (bus == 0)
hose->cfg_addr = (unsigned int *)CONFIG_SYS_PCIE1_CFG_BASE;
else
hose->cfg_addr = (unsigned int *)CONFIG_SYS_PCIE2_CFG_BASE;
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);
if (!link)
hose->indirect_type = INDIRECT_TYPE_NO_PCIE_LINK;
pci_register_hose(hose);
#ifdef CONFIG_PCI_SCAN_SHOW
printf("PCI: Bus Dev VenId DevId Class Int\n");
#endif
/*
* Hose scan.
*/
hose->last_busno = pci_hose_scan(hose);
max_bus = hose->last_busno + 1;
}
#else
static void mpc83xx_pcie_register_hose(int bus, struct pci_region *reg,
u8 link) {}
#endif /* CONFIG_83XX_GENERIC_PCIE_REGISTER_HOSES */
static void mpc83xx_pcie_init_bus(int bus, struct pci_region *reg)
{
immap_t *immr = (immap_t *)CONFIG_SYS_IMMR;
pex83xx_t *pex = &immr->pciexp[bus];
struct pex_outbound_window *out_win;
struct pex_inbound_window *in_win;
void *hose_cfg_base;
unsigned int ram_sz;
unsigned int barl;
unsigned int tar;
u16 reg16;
int i;
/* Enable pex csb bridge inbound & outbound transactions */
out_le32(&pex->bridge.pex_csb_ctrl,
in_le32(&pex->bridge.pex_csb_ctrl) | PEX_CSB_CTRL_OBPIOE |
PEX_CSB_CTRL_IBPIOE);
/* Enable bridge outbound */
out_le32(&pex->bridge.pex_csb_obctrl, PEX_CSB_OBCTRL_PIOE |
PEX_CSB_OBCTRL_MEMWE | PEX_CSB_OBCTRL_IOWE |
PEX_CSB_OBCTRL_CFGWE);
out_win = &pex->bridge.pex_outbound_win[0];
if (bus) {
out_le32(&out_win->ar, PEX_OWAR_EN | PEX_OWAR_TYPE_CFG |
CONFIG_SYS_PCIE2_CFG_SIZE);
out_le32(&out_win->bar, CONFIG_SYS_PCIE2_CFG_BASE);
} else {
out_le32(&out_win->ar, PEX_OWAR_EN | PEX_OWAR_TYPE_CFG |
CONFIG_SYS_PCIE1_CFG_SIZE);
out_le32(&out_win->bar, CONFIG_SYS_PCIE1_CFG_BASE);
}
out_le32(&out_win->tarl, 0);
out_le32(&out_win->tarh, 0);
for (i = 0; i < 2; i++, reg++) {
u32 ar;
if (reg->size == 0)
break;
out_win = &pex->bridge.pex_outbound_win[i + 1];
out_le32(&out_win->bar, reg->phys_start);
out_le32(&out_win->tarl, reg->bus_start);
out_le32(&out_win->tarh, 0);
ar = PEX_OWAR_EN | (reg->size & PEX_OWAR_SIZE);
if (reg->flags & PCI_REGION_IO)
ar |= PEX_OWAR_TYPE_IO;
else
ar |= PEX_OWAR_TYPE_MEM;
out_le32(&out_win->ar, ar);
}
out_le32(&pex->bridge.pex_csb_ibctrl, PEX_CSB_IBCTRL_PIOE);
ram_sz = gd->ram_size;
barl = 0;
tar = 0;
i = 0;
while (ram_sz > 0) {
in_win = &pex->bridge.pex_inbound_win[i];
out_le32(&in_win->barl, barl);
out_le32(&in_win->barh, 0x0);
out_le32(&in_win->tar, tar);
if (ram_sz >= 0x10000000) {
/* The maxium windows size is 256M */
out_le32(&in_win->ar, PEX_IWAR_EN | PEX_IWAR_NSOV |
PEX_IWAR_TYPE_PF | 0x0FFFF000);
barl += 0x10000000;
tar += 0x10000000;
ram_sz -= 0x10000000;
} else {
/* The UM is not clear here.
* So, round up to even Mb boundary */
ram_sz = ram_sz >> (20 +
((ram_sz & 0xFFFFF) ? 1 : 0));
if (!(ram_sz % 2))
ram_sz -= 1;
out_le32(&in_win->ar, PEX_IWAR_EN | PEX_IWAR_NSOV |
PEX_IWAR_TYPE_PF | (ram_sz << 20) | 0xFF000);
ram_sz = 0;
}
i++;
}
in_win = &pex->bridge.pex_inbound_win[i];
out_le32(&in_win->barl, CONFIG_SYS_IMMR);
out_le32(&in_win->barh, 0);
out_le32(&in_win->tar, CONFIG_SYS_IMMR);
out_le32(&in_win->ar, PEX_IWAR_EN |
PEX_IWAR_TYPE_NO_PF | PEX_IWAR_SIZE_1M);
/* Enable the host virtual INTX interrupts */
out_le32(&pex->bridge.pex_int_axi_misc_enb,
in_le32(&pex->bridge.pex_int_axi_misc_enb) | 0x1E0);
/* Hose configure header is memory-mapped */
hose_cfg_base = (void *)pex;
get_clocks();
/* Configure the PCIE controller core clock ratio */
out_le32(hose_cfg_base + PEX_GCLK_RATIO,
(((bus ? gd->pciexp2_clk : gd->pciexp1_clk) / 1000000) * 16)
/ 333);
udelay(1000000);
/* Do Type 1 bridge configuration */
out_8(hose_cfg_base + PCI_PRIMARY_BUS, 0);
out_8(hose_cfg_base + PCI_SECONDARY_BUS, 1);
out_8(hose_cfg_base + PCI_SUBORDINATE_BUS, 255);
/*
* Write to Command register
*/
reg16 = in_le16(hose_cfg_base + PCI_COMMAND);
reg16 |= PCI_COMMAND_MASTER | PCI_COMMAND_MEMORY | PCI_COMMAND_IO |
PCI_COMMAND_SERR | PCI_COMMAND_PARITY;
out_le16(hose_cfg_base + PCI_COMMAND, reg16);
/*
* Clear non-reserved bits in status register.
*/
out_le16(hose_cfg_base + PCI_STATUS, 0xffff);
out_8(hose_cfg_base + PCI_LATENCY_TIMER, 0x80);
out_8(hose_cfg_base + PCI_CACHE_LINE_SIZE, 0x08);
printf("PCIE%d: ", bus);
reg16 = in_le16(hose_cfg_base + PCI_LTSSM);
if (reg16 >= PCI_LTSSM_L0)
printf("link\n");
else
printf("No link\n");
mpc83xx_pcie_register_hose(bus, reg, reg16 >= PCI_LTSSM_L0);
}
/*
* The caller must have already set SCCR, SERDES and the PCIE_LAW BARs
* must have been set to cover all of the requested regions.
*/
void mpc83xx_pcie_init(int num_buses, struct pci_region **reg, int warmboot)
{
int i;
/*
* Release PCI RST Output signal.
* Power on to RST high must be at least 100 ms as per PCI spec.
* On warm boots only 1 ms is required.
*/
udelay(warmboot ? 1000 : 100000);
for (i = 0; i < num_buses; i++)
mpc83xx_pcie_init_bus(i, reg[i]);
}
......@@ -132,7 +132,7 @@ int get_clocks(void)
u32 qe_clk;
u32 brg_clk;
#endif
#if defined(CONFIG_MPC837X)
#if defined(CONFIG_MPC837X) || defined(CONFIG_MPC831X)
u32 pciexp1_clk;
u32 pciexp2_clk;
#endif
......@@ -328,7 +328,7 @@ int get_clocks(void)
i2c2_clk = csb_clk; /* i2c-2 clk is equal to csb clk */
#endif
#if defined(CONFIG_MPC837X)
#if defined(CONFIG_MPC837X) || defined(CONFIG_MPC831X)
switch ((sccr & SCCR_PCIEXP1CM) >> SCCR_PCIEXP1CM_SHIFT) {
case 0:
pciexp1_clk = 0;
......
......@@ -75,7 +75,7 @@ typedef struct global_data {
u32 lbiu_clk;
u32 lclk_clk;
u32 pci_clk;
#if defined(CONFIG_MPC837X)
#if defined(CONFIG_MPC837X) || defined(CONFIG_MPC831X)
u32 pciexp1_clk;
u32 pciexp2_clk;
#endif
......
......@@ -52,23 +52,28 @@ typedef struct sysconf83xx {
law83xx_t lblaw[4]; /* LBIU local access window */
u8 res2[0x20];
law83xx_t pcilaw[2]; /* PCI local access window */
u8 res3[0x30];
u8 res3[0x10];
law83xx_t pcielaw[2]; /* PCI Express local access window */
u8 res4[0x10];
law83xx_t ddrlaw[2]; /* DDR local access window */
u8 res4[0x50];
u8 res5[0x50];
u32 sgprl; /* System General Purpose Register Low */
u32 sgprh; /* System General Purpose Register High */
u32 spridr; /* System Part and Revision ID Register */
u8 res5[0x04];
u8 res6[0x04];
u32 spcr; /* System Priority Configuration Register */
u32 sicrl; /* System I/O Configuration Register Low */
u32 sicrh; /* System I/O Configuration Register High */
u8 res6[0x04];
u8 res7[0x04];
u32 sidcr0; /* System I/O Delay Configuration Register 0 */
u32 sidcr1; /* System I/O Delay Configuration Register 1 */
u32 ddrcdr; /* DDR Control Driver Register */
u32 ddrdsr; /* DDR Debug Status Register */
u32 obir; /* Output Buffer Impedance Register */
u8 res7[0xCC];
u8 res8[0xC];
u32 pecr1; /* PCI Express control register 1 */
u32 pecr2; /* PCI Express control register 2 */
u8 res9[0xB8];
} sysconf83xx_t;
/*
......@@ -503,8 +508,110 @@ typedef struct security83xx {
/*
* PCI Express
*/
struct pex_inbound_window {
u32 ar;
u32 tar;
u32 barl;
u32 barh;
};
struct pex_outbound_window {
u32 ar;
u32 bar;
u32 tarl;
u32 tarh;
};
struct pex_csb_bridge {
u32 pex_csb_ver;
u32 pex_csb_cab;
u32 pex_csb_ctrl;
u8 res0[8];
u32 pex_dms_dstmr;
u8 res1[4];
u32 pex_cbs_stat;
u8 res2[0x20];
u32 pex_csb_obctrl;
u32 pex_csb_obstat;
u8 res3[0x98];
u32 pex_csb_ibctrl;
u32 pex_csb_ibstat;
u8 res4[0xb8];
u32 pex_wdma_ctrl;
u32 pex_wdma_addr;
u32 pex_wdma_stat;
u8 res5[0x94];
u32 pex_rdma_ctrl;
u32 pex_rdma_addr;
u32 pex_rdma_stat;
u8 res6[0xd4];
u32 pex_ombcr;
u32 pex_ombdr;
u8 res7[0x38];
u32 pex_imbcr;
u32 pex_imbdr;
u8 res8[0x38];
u32 pex_int_enb;
u32 pex_int_stat;
u32 pex_int_apio_vec1;
u32 pex_int_apio_vec2;
u8 res9[0x10];
u32 pex_int_ppio_vec1;
u32 pex_int_ppio_vec2;
u32 pex_int_wdma_vec1;
u32 pex_int_wdma_vec2;
u32 pex_int_rdma_vec1;
u32 pex_int_rdma_vec2;
u32 pex_int_misc_vec;
u8 res10[4];
u32 pex_int_axi_pio_enb;
u32 pex_int_axi_wdma_enb;
u32 pex_int_axi_rdma_enb;
u32 pex_int_axi_misc_enb;
u32 pex_int_axi_pio_stat;
u32 pex_int_axi_wdma_stat;
u32 pex_int_axi_rdma_stat;
u32 pex_int_axi_misc_stat;
u8 res11[0xa0];
struct pex_outbound_window pex_outbound_win[4];
u8 res12[0x100];
u32 pex_epiwtar0;
u32 pex_epiwtar1;
u32 pex_epiwtar2;
u32 pex_epiwtar3;
u8 res13[0x70];
struct pex_inbound_window pex_inbound_win[4];
};
typedef struct pex83xx {
u8 fixme[0x1000];
u8 pex_cfg_header[0x404];
u32 pex_ltssm_stat;
u8 res0[0x30];
u32 pex_ack_replay_timeout;
u8 res1[4];
u32 pex_gclk_ratio;
u8 res2[0xc];
u32 pex_pm_timer;
u32 pex_pme_timeout;
u8 res3[4];
u32 pex_aspm_req_timer;
u8 res4[0x18];
u32 pex_ssvid_update;
u8 res5[0x34];
u32 pex_cfg_ready;
u8 res6[0x24];
u32 pex_bar_sizel;
u8 res7[4];
u32 pex_bar_sel;
u8 res8[0x20];
u32 pex_bar_pf;
u8 res9[0x88];
u32 pex_pme_to_ack_tor;
u8 res10[0xc];
u32 pex_ss_intr_mask;
u8 res11[0x25c];
struct pex_csb_bridge bridge;
u8 res12[0x160];
} pex83xx_t;
/*
......
......@@ -751,9 +751,6 @@
#define SCCR_USBDRCM_2 0x00800000
#define SCCR_USBDRCM_3 0x00c00000
#define SCCR_PCIEXP1CM 0x00300000
#define SCCR_PCIEXP2CM 0x000c0000
#define SCCR_SATA1CM 0x00003000
#define SCCR_SATA1CM_SHIFT 12
#define SCCR_SATACM 0x00003c00
......@@ -800,6 +797,17 @@
#define SCCR_USBDRCM_2 0x00800000
#define SCCR_USBDRCM_3 0x00c00000
/* All of the four SATA controllers must have the same clock ratio */
#define SCCR_SATA1CM 0x000000c0
#define SCCR_SATA1CM_SHIFT 6
#define SCCR_SATACM 0x000000ff
#define SCCR_SATACM_SHIFT 0
#define SCCR_SATACM_0 0x00000000
#define SCCR_SATACM_1 0x00000055
#define SCCR_SATACM_2 0x000000aa
#define SCCR_SATACM_3 0x000000ff
#endif
#define SCCR_PCIEXP1CM 0x00300000
#define SCCR_PCIEXP1CM_SHIFT 20
#define SCCR_PCIEXP1CM_0 0x00000000
......@@ -814,17 +822,6 @@
#define SCCR_PCIEXP2CM_2 0x00080000
#define SCCR_PCIEXP2CM_3 0x000c0000
/* All of the four SATA controllers must have the same clock ratio */
#define SCCR_SATA1CM 0x000000c0
#define SCCR_SATA1CM_SHIFT 6
#define SCCR_SATACM 0x000000ff
#define SCCR_SATACM_SHIFT 0
#define SCCR_SATACM_0 0x00000000
#define SCCR_SATACM_1 0x00000055
#define SCCR_SATACM_2 0x000000aa
#define SCCR_SATACM_3 0x000000ff
#endif
/* CSn_BDNS - Chip Select memory Bounds Register
*/
#define CSBNDS_SA 0x00FF0000
......@@ -1170,10 +1167,52 @@
#define DDRCDR_M_ODR 0x00000002
#define DDRCDR_Q_DRN 0x00000001
/* PCIE Bridge Register
*/
#define PEX_CSB_CTRL_OBPIOE 0x00000001
#define PEX_CSB_CTRL_IBPIOE 0x00000002
#define PEX_CSB_CTRL_WDMAE 0x00000004
#define PEX_CSB_CTRL_RDMAE 0x00000008
#define PEX_CSB_OBCTRL_PIOE 0x00000001
#define PEX_CSB_OBCTRL_MEMWE 0x00000002
#define PEX_CSB_OBCTRL_IOWE 0x00000004
#define PEX_CSB_OBCTRL_CFGWE 0x00000008
#define PEX_CSB_IBCTRL_PIOE 0x00000001
#define PEX_OWAR_EN 0x00000001
#define PEX_OWAR_TYPE_CFG 0x00000000
#define PEX_OWAR_TYPE_IO 0x00000002
#define PEX_OWAR_TYPE_MEM 0x00000004
#define PEX_OWAR_RLXO 0x00000008
#define PEX_OWAR_NANP 0x00000010
#define PEX_OWAR_SIZE 0xFFFFF000
#define PEX_IWAR_EN 0x00000001
#define PEX_IWAR_TYPE_INT 0x00000000
#define PEX_IWAR_TYPE_PF 0x00000004
#define PEX_IWAR_TYPE_NO_PF 0x00000006
#define PEX_IWAR_NSOV 0x00000008
#define PEX_IWAR_NSNP 0x00000010
#define PEX_IWAR_SIZE 0xFFFFF000
#define PEX_IWAR_SIZE_1M 0x000FF000
#define PEX_IWAR_SIZE_2M 0x001FF000
#define PEX_IWAR_SIZE_4M 0x003FF000
#define PEX_IWAR_SIZE_8M 0x007FF000
#define PEX_IWAR_SIZE_16M 0x00FFF000
#define PEX_IWAR_SIZE_32M 0x01FFF000
#define PEX_IWAR_SIZE_64M 0x03FFF000
#define PEX_IWAR_SIZE_128M 0x07FFF000
#define PEX_IWAR_SIZE_256M 0x0FFFF000
#define PEX_GCLK_RATIO 0x440
#ifndef __ASSEMBLY__
struct pci_region;
void mpc83xx_pci_init(int num_buses, struct pci_region **reg, int warmboot);
void mpc83xx_pcislave_unlock(int bus);
void mpc83xx_pcie_init(int num_buses, struct pci_region **reg, int warmboot);
#endif
#endif /* __MPC83XX_H__ */
......@@ -382,6 +382,8 @@ extern void pci_cfgfunc_config_device(struct pci_controller* hose, pci_dev_t dev
#define MAX_PCI_REGIONS 7
#define INDIRECT_TYPE_NO_PCIE_LINK 1
/*
* Structure of a PCI controller (host bridge)
*/
......@@ -394,6 +396,8 @@ struct pci_controller {
volatile unsigned int *cfg_addr;
volatile unsigned char *cfg_data;
int indirect_type;
struct pci_region regions[MAX_PCI_REGIONS];
int region_count;
......
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