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plat-orion: share PCIe handling code

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Split off Orion PCIe handling code into plat-orion/.

Signed-off-by: Lennert Buytenhek <buytenh@marvell.com>
Reviewed-by: Tzachi Perelstein <tzachi@marvell.com>
Acked-by: Russell King <rmk+kernel@arm.linux.org.uk>
Signed-off-by: Nicolas Pitre <nico@marvell.com>
This commit is contained in:
Lennert Buytenhek 2008-03-27 14:51:40 -04:00 committed by Nicolas Pitre
parent 01eb569823
commit abc0197d7a
5 changed files with 387 additions and 282 deletions
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4
arch/arm/mach-orion/common.h
View File

@ -43,8 +43,8 @@ struct pci_sys_data;
struct pci_bus; struct pci_bus;
void orion_pcie_id(u32 *dev, u32 *rev); void orion_pcie_id(u32 *dev, u32 *rev);
u32 orion_pcie_local_bus_nr(void); int orion_pcie_local_bus_nr(void);
u32 orion_pci_local_bus_nr(void); int orion_pci_local_bus_nr(void);
int orion_pci_sys_setup(int nr, struct pci_sys_data *sys); int orion_pci_sys_setup(int nr, struct pci_sys_data *sys);
struct pci_bus *orion_pci_sys_scan_bus(int nr, struct pci_sys_data *sys); struct pci_bus *orion_pci_sys_scan_bus(int nr, struct pci_sys_data *sys);

387
arch/arm/mach-orion/pci.c
View File

@ -14,6 +14,7 @@
#include <linux/pci.h> #include <linux/pci.h>
#include <linux/mbus.h> #include <linux/mbus.h>
#include <asm/mach/pci.h> #include <asm/mach/pci.h>
#include <asm/plat-orion/pcie.h>
#include "common.h" #include "common.h"
/***************************************************************************** /*****************************************************************************
@ -32,55 +33,35 @@
/***************************************************************************** /*****************************************************************************
* PCIE controller * PCIE controller
****************************************************************************/ ****************************************************************************/
#define PCIE_CTRL ORION_PCIE_REG(0x1a00) #define PCIE_BASE ((void __iomem *)ORION_PCIE_VIRT_BASE)
#define PCIE_STAT ORION_PCIE_REG(0x1a04)
#define PCIE_DEV_ID ORION_PCIE_REG(0x0000)
#define PCIE_CMD_STAT ORION_PCIE_REG(0x0004)
#define PCIE_DEV_REV ORION_PCIE_REG(0x0008)
#define PCIE_MASK ORION_PCIE_REG(0x1910)
#define PCIE_CONF_ADDR ORION_PCIE_REG(0x18f8)
#define PCIE_CONF_DATA ORION_PCIE_REG(0x18fc)
/* void orion_pcie_id(u32 *dev, u32 *rev)
* PCIE_STAT bits {
*/ *dev = orion_pcie_dev_id(PCIE_BASE);
#define PCIE_STAT_LINK_DOWN 1 *rev = orion_pcie_rev(PCIE_BASE);
#define PCIE_STAT_BUS_OFFS 8 }
#define PCIE_STAT_BUS_MASK (0xff << PCIE_STAT_BUS_OFFS)
#define PCIE_STAT_DEV_OFFS 20
#define PCIE_STAT_DEV_MASK (0x1f << PCIE_STAT_DEV_OFFS)
/* int orion_pcie_local_bus_nr(void)
* PCIE_CONF_ADDR bits {
*/ return orion_pcie_get_local_bus_nr(PCIE_BASE);
#define PCIE_CONF_REG(r) ((((r) & 0xf00) << 24) | ((r) & 0xfc)) }
#define PCIE_CONF_FUNC(f) (((f) & 0x3) << 8)
#define PCIE_CONF_DEV(d) (((d) & 0x1f) << 11)
#define PCIE_CONF_BUS(b) (((b) & 0xff) << 16)
#define PCIE_CONF_ADDR_EN (1 << 31)
/* static int pcie_valid_config(int bus, int dev)
* PCIE Address Decode Windows registers {
*/ /*
#define PCIE_BAR_CTRL(n) ORION_PCIE_REG(0x1804 + ((n - 1) * 4)) * Don't go out when trying to access --
#define PCIE_BAR_LO(n) ORION_PCIE_REG(0x0010 + ((n) * 8)) * 1. our own device / nonexisting device on local bus
#define PCIE_BAR_HI(n) ORION_PCIE_REG(0x0014 + ((n) * 8)) * 2. where there's no device connected (no link)
#define PCIE_WIN_CTRL(n) (((n) < 5) ? \ */
ORION_PCIE_REG(0x1820 + ((n) << 4)) : \ if (bus == 0 && dev != 1)
ORION_PCIE_REG(0x1880)) return 0;
#define PCIE_WIN_BASE(n) (((n) < 5) ? \
ORION_PCIE_REG(0x1824 + ((n) << 4)) : \ if (!orion_pcie_link_up(PCIE_BASE))
ORION_PCIE_REG(0x1884)) return 0;
#define PCIE_WIN_REMAP(n) (((n) < 5) ? \
ORION_PCIE_REG(0x182c + ((n) << 4)) : \ return 1;
ORION_PCIE_REG(0x188c)) }
#define PCIE_MAX_BARS 3
#define PCIE_MAX_WINS 6
/*
* Use PCIE BAR '1' for all DDR banks
*/
#define PCIE_DRAM_BAR 1
/* /*
* PCIE config cycles are done by programming the PCIE_CONF_ADDR register * PCIE config cycles are done by programming the PCIE_CONF_ADDR register
@ -89,231 +70,99 @@
*/ */
static DEFINE_SPINLOCK(orion_pcie_lock); static DEFINE_SPINLOCK(orion_pcie_lock);
void orion_pcie_id(u32 *dev, u32 *rev) static int pcie_rd_conf(struct pci_bus *bus, u32 devfn, int where,
{ int size, u32 *val)
*dev = orion_read(PCIE_DEV_ID) >> 16;
*rev = orion_read(PCIE_DEV_REV) & 0xff;
}
u32 orion_pcie_local_bus_nr(void)
{
u32 stat = orion_read(PCIE_STAT);
return((stat & PCIE_STAT_BUS_MASK) >> PCIE_STAT_BUS_OFFS);
}
static u32 orion_pcie_local_dev_nr(void)
{
u32 stat = orion_read(PCIE_STAT);
return((stat & PCIE_STAT_DEV_MASK) >> PCIE_STAT_DEV_OFFS);
}
static u32 orion_pcie_no_link(void)
{
u32 stat = orion_read(PCIE_STAT);
return(stat & PCIE_STAT_LINK_DOWN);
}
static void orion_pcie_set_bus_nr(int nr)
{
orion_clrbits(PCIE_STAT, PCIE_STAT_BUS_MASK);
orion_setbits(PCIE_STAT, nr << PCIE_STAT_BUS_OFFS);
}
/*
* Setup PCIE BARs and Address Decode Wins:
* BAR[0,2] -> disabled, BAR[1] -> covers all DRAM banks
* WIN[0-3] -> DRAM bank[0-3]
*/
static void orion_setup_pcie_wins(struct mbus_dram_target_info *dram)
{
u32 size;
int i;
/*
* First, disable and clear BARs and windows
*/
for (i = 1; i < PCIE_MAX_BARS; i++) {
writel(0, PCIE_BAR_CTRL(i));
writel(0, PCIE_BAR_LO(i));
writel(0, PCIE_BAR_HI(i));
}
for (i = 0; i < PCIE_MAX_WINS; i++) {
writel(0, PCIE_WIN_CTRL(i));
writel(0, PCIE_WIN_BASE(i));
writel(0, PCIE_WIN_REMAP(i));
}
/*
* Setup windows for DDR banks. Count total DDR size on the fly.
*/
size = 0;
for (i = 0; i < dram->num_cs; i++) {
struct mbus_dram_window *cs = dram->cs + i;
writel(cs->base & 0xffff0000, PCIE_WIN_BASE(i));
writel(0, PCIE_WIN_REMAP(i));
writel(((cs->size - 1) & 0xffff0000) |
(cs->mbus_attr << 8) |
(dram->mbus_dram_target_id << 4) |
(PCIE_DRAM_BAR << 1) | 1, PCIE_WIN_CTRL(i));
size += cs->size;
}
/*
* Setup BAR[1] to all DRAM banks
*/
writel(dram->cs[0].base, PCIE_BAR_LO(PCIE_DRAM_BAR));
writel(0, PCIE_BAR_HI(PCIE_DRAM_BAR));
writel(((size - 1) & 0xffff0000) | 1, PCIE_BAR_CTRL(PCIE_DRAM_BAR));
}
static void orion_pcie_master_slave_enable(void)
{
orion_setbits(PCIE_CMD_STAT, PCI_COMMAND_MASTER |
PCI_COMMAND_IO |
PCI_COMMAND_MEMORY);
}
static void orion_pcie_enable_interrupts(void)
{
/*
* Enable interrupts lines
* INTA[24] INTB[25] INTC[26] INTD[27]
*/
orion_setbits(PCIE_MASK, 0xf<<24);
}
static int orion_pcie_valid_config(u32 bus, u32 dev)
{
/*
* Don't go out when trying to access --
* 1. our own device
* 2. where there's no device connected (no link)
* 3. nonexisting devices on local bus
*/
if ((orion_pcie_local_bus_nr() == bus) &&
(orion_pcie_local_dev_nr() == dev))
return 0;
if (orion_pcie_no_link())
return 0;
if (bus == orion_pcie_local_bus_nr())
if (((orion_pcie_local_dev_nr() == 0) && (dev != 1)) ||
((orion_pcie_local_dev_nr() != 0) && (dev != 0)))
return 0;
return 1;
}
static int orion_pcie_rd_conf(struct pci_bus *bus, u32 devfn, int where,
int size, u32 *val)
{ {
unsigned long flags; unsigned long flags;
unsigned int dev, rev, pcie_addr; int ret;
if (orion_pcie_valid_config(bus->number, PCI_SLOT(devfn)) == 0) { if (pcie_valid_config(bus->number, PCI_SLOT(devfn)) == 0) {
*val = 0xffffffff; *val = 0xffffffff;
return PCIBIOS_DEVICE_NOT_FOUND; return PCIBIOS_DEVICE_NOT_FOUND;
} }
spin_lock_irqsave(&orion_pcie_lock, flags); spin_lock_irqsave(&orion_pcie_lock, flags);
ret = orion_pcie_rd_conf(PCIE_BASE, bus, devfn, where, size, val);
orion_write(PCIE_CONF_ADDR, PCIE_CONF_BUS(bus->number) |
PCIE_CONF_DEV(PCI_SLOT(devfn)) |
PCIE_CONF_FUNC(PCI_FUNC(devfn)) |
PCIE_CONF_REG(where) | PCIE_CONF_ADDR_EN);
orion_pcie_id(&dev, &rev);
if (dev == MV88F5181_DEV_ID || dev == MV88F5182_DEV_ID) {
/* extended register space */
pcie_addr = ORION_PCIE_WA_VIRT_BASE;
pcie_addr |= PCIE_CONF_BUS(bus->number) |
PCIE_CONF_DEV(PCI_SLOT(devfn)) |
PCIE_CONF_FUNC(PCI_FUNC(devfn)) |
PCIE_CONF_REG(where);
*val = orion_read(pcie_addr);
} else
*val = orion_read(PCIE_CONF_DATA);
if (size == 1)
*val = (*val >> (8*(where & 0x3))) & 0xff;
else if (size == 2)
*val = (*val >> (8*(where & 0x3))) & 0xffff;
spin_unlock_irqrestore(&orion_pcie_lock, flags);
return PCIBIOS_SUCCESSFUL;
}
static int orion_pcie_wr_conf(struct pci_bus *bus, u32 devfn, int where,
int size, u32 val)
{
unsigned long flags;
int ret;
if (orion_pcie_valid_config(bus->number, PCI_SLOT(devfn)) == 0)
return PCIBIOS_DEVICE_NOT_FOUND;
spin_lock_irqsave(&orion_pcie_lock, flags);
ret = PCIBIOS_SUCCESSFUL;
orion_write(PCIE_CONF_ADDR, PCIE_CONF_BUS(bus->number) |
PCIE_CONF_DEV(PCI_SLOT(devfn)) |
PCIE_CONF_FUNC(PCI_FUNC(devfn)) |
PCIE_CONF_REG(where) | PCIE_CONF_ADDR_EN);
if (size == 4) {
__raw_writel(val, PCIE_CONF_DATA);
} else if (size == 2) {
__raw_writew(val, PCIE_CONF_DATA + (where & 0x3));
} else if (size == 1) {
__raw_writeb(val, PCIE_CONF_DATA + (where & 0x3));
} else {
ret = PCIBIOS_BAD_REGISTER_NUMBER;
}
spin_unlock_irqrestore(&orion_pcie_lock, flags); spin_unlock_irqrestore(&orion_pcie_lock, flags);
return ret; return ret;
} }
struct pci_ops orion_pcie_ops = { static int pcie_rd_conf_wa(struct pci_bus *bus, u32 devfn,
.read = orion_pcie_rd_conf, int where, int size, u32 *val)
.write = orion_pcie_wr_conf, {
int ret;
if (pcie_valid_config(bus->number, PCI_SLOT(devfn)) == 0) {
*val = 0xffffffff;
return PCIBIOS_DEVICE_NOT_FOUND;
}
/*
* We only support access to the non-extended configuration
* space when using the WA access method (or we would have to
* sacrifice 256M of CPU virtual address space.)
*/
if (where >= 0x100) {
*val = 0xffffffff;
return PCIBIOS_DEVICE_NOT_FOUND;
}
ret = orion_pcie_rd_conf_wa((void __iomem *)ORION_PCIE_WA_VIRT_BASE,
bus, devfn, where, size, val);
return ret;
}
static int pcie_wr_conf(struct pci_bus *bus, u32 devfn,
int where, int size, u32 val)
{
unsigned long flags;
int ret;
if (pcie_valid_config(bus->number, PCI_SLOT(devfn)) == 0)
return PCIBIOS_DEVICE_NOT_FOUND;
spin_lock_irqsave(&orion_pcie_lock, flags);
ret = orion_pcie_wr_conf(PCIE_BASE, bus, devfn, where, size, val);
spin_unlock_irqrestore(&orion_pcie_lock, flags);
return ret;
}
struct pci_ops pcie_ops = {
.read = pcie_rd_conf,
.write = pcie_wr_conf,
}; };
static int orion_pcie_setup(struct pci_sys_data *sys) static int pcie_setup(struct pci_sys_data *sys)
{ {
struct resource *res; struct resource *res;
int dev;
/* /*
* Point PCIe unit MBUS decode windows to DRAM space. * Generic PCIe unit setup.
*/ */
orion_setup_pcie_wins(&orion_mbus_dram_info); orion_pcie_setup(PCIE_BASE, &orion_mbus_dram_info);
/* /*
* Master + Slave enable * Check whether to apply Orion-1/Orion-NAS PCIe config
* read transaction workaround.
*/ */
orion_pcie_master_slave_enable(); dev = orion_pcie_dev_id(PCIE_BASE);
if (dev == MV88F5181_DEV_ID || dev == MV88F5182_DEV_ID) {
printk(KERN_NOTICE "Applying Orion-1/Orion-NAS PCIe config "
"read transaction workaround\n");
pcie_ops.read = pcie_rd_conf_wa;
}
/* /*
* Enable interrupts lines A-D * Request resources.
*/
orion_pcie_enable_interrupts();
/*
* Request resource
*/ */
res = kzalloc(sizeof(struct resource) * 2, GFP_KERNEL); res = kzalloc(sizeof(struct resource) * 2, GFP_KERNEL);
if (!res) if (!res)
panic("orion_pci_setup unable to alloc resources"); panic("pcie_setup unable to alloc resources");
/* /*
* IORESOURCE_IO * IORESOURCE_IO
@ -417,19 +266,19 @@ static int orion_pcie_setup(struct pci_sys_data *sys)
*/ */
static DEFINE_SPINLOCK(orion_pci_lock); static DEFINE_SPINLOCK(orion_pci_lock);
u32 orion_pci_local_bus_nr(void) int orion_pci_local_bus_nr(void)
{ {
u32 conf = orion_read(PCI_P2P_CONF); u32 conf = orion_read(PCI_P2P_CONF);
return((conf & PCI_P2P_BUS_MASK) >> PCI_P2P_BUS_OFFS); return((conf & PCI_P2P_BUS_MASK) >> PCI_P2P_BUS_OFFS);
} }
static u32 orion_pci_local_dev_nr(void) static int orion_pci_local_dev_nr(void)
{ {
u32 conf = orion_read(PCI_P2P_CONF); u32 conf = orion_read(PCI_P2P_CONF);
return((conf & PCI_P2P_DEV_MASK) >> PCI_P2P_DEV_OFFS); return((conf & PCI_P2P_DEV_MASK) >> PCI_P2P_DEV_OFFS);
} }
static int orion_pci_hw_rd_conf(u32 bus, u32 dev, u32 func, static int orion_pci_hw_rd_conf(int bus, int dev, u32 func,
u32 where, u32 size, u32 *val) u32 where, u32 size, u32 *val)
{ {
unsigned long flags; unsigned long flags;
@ -451,7 +300,7 @@ static int orion_pci_hw_rd_conf(u32 bus, u32 dev, u32 func,
return PCIBIOS_SUCCESSFUL; return PCIBIOS_SUCCESSFUL;
} }
static int orion_pci_hw_wr_conf(u32 bus, u32 dev, u32 func, static int orion_pci_hw_wr_conf(int bus, int dev, u32 func,
u32 where, u32 size, u32 val) u32 where, u32 size, u32 val)
{ {
unsigned long flags; unsigned long flags;
@ -508,7 +357,7 @@ static int orion_pci_wr_conf(struct pci_bus *bus, u32 devfn,
PCI_FUNC(devfn), where, size, val); PCI_FUNC(devfn), where, size, val);
} }
struct pci_ops orion_pci_ops = { struct pci_ops pci_ops = {
.read = orion_pci_rd_conf, .read = orion_pci_rd_conf,
.write = orion_pci_wr_conf, .write = orion_pci_wr_conf,
}; };
@ -540,7 +389,8 @@ static void orion_pci_set_bus_nr(int nr)
static void orion_pci_master_slave_enable(void) static void orion_pci_master_slave_enable(void)
{ {
u32 bus_nr, dev_nr, func, reg, val; int bus_nr, dev_nr, func, reg;
u32 val;
bus_nr = orion_pci_local_bus_nr(); bus_nr = orion_pci_local_bus_nr();
dev_nr = orion_pci_local_dev_nr(); dev_nr = orion_pci_local_dev_nr();
@ -554,8 +404,8 @@ static void orion_pci_master_slave_enable(void)
static void orion_setup_pci_wins(struct mbus_dram_target_info *dram) static void orion_setup_pci_wins(struct mbus_dram_target_info *dram)
{ {
u32 win_enable; u32 win_enable;
u32 bus; int bus;
u32 dev; int dev;
int i; int i;
/* /*
@ -611,7 +461,7 @@ static void orion_setup_pci_wins(struct mbus_dram_target_info *dram)
orion_setbits(PCI_ADDR_DECODE_CTRL, 1); orion_setbits(PCI_ADDR_DECODE_CTRL, 1);
} }
static int orion_pci_setup(struct pci_sys_data *sys) static int pci_setup(struct pci_sys_data *sys)
{ {
struct resource *res; struct resource *res;
@ -635,7 +485,7 @@ static int orion_pci_setup(struct pci_sys_data *sys)
*/ */
res = kzalloc(sizeof(struct resource) * 2, GFP_KERNEL); res = kzalloc(sizeof(struct resource) * 2, GFP_KERNEL);
if (!res) if (!res)
panic("orion_pci_setup unable to alloc resources"); panic("pci_setup unable to alloc resources");
/* /*
* IORESOURCE_IO * IORESOURCE_IO
@ -674,16 +524,11 @@ int orion_pci_sys_setup(int nr, struct pci_sys_data *sys)
int ret = 0; int ret = 0;
if (nr == 0) { if (nr == 0) {
/* orion_pcie_set_local_bus_nr(PCIE_BASE, sys->busnr);
* PCIE setup ret = pcie_setup(sys);
*/
orion_pcie_set_bus_nr(0);
ret = orion_pcie_setup(sys);
} else if (nr == 1) { } else if (nr == 1) {
/* orion_pci_set_bus_nr(sys->busnr);
* PCI setup ret = pci_setup(sys);
*/
ret = orion_pci_setup(sys);
} }
return ret; return ret;
@ -691,31 +536,15 @@ int orion_pci_sys_setup(int nr, struct pci_sys_data *sys)
struct pci_bus *orion_pci_sys_scan_bus(int nr, struct pci_sys_data *sys) struct pci_bus *orion_pci_sys_scan_bus(int nr, struct pci_sys_data *sys)
{ {
struct pci_ops *ops;
struct pci_bus *bus; struct pci_bus *bus;
if (nr == 0) { if (nr == 0) {
u32 pci_bus; bus = pci_scan_bus(sys->busnr, &pcie_ops, sys);
/*
* PCIE scan
*/
ops = &orion_pcie_ops;
bus = pci_scan_bus(sys->busnr, ops, sys);
/*
* Set local PCI bus number to follow PCIE bridges (if any)
*/
pci_bus = bus->number + bus->subordinate - bus->secondary + 1;
orion_pci_set_bus_nr(pci_bus);
} else if (nr == 1) { } else if (nr == 1) {
/* bus = pci_scan_bus(sys->busnr, &pci_ops, sys);
* PCI scan
*/
ops = &orion_pci_ops;
bus = pci_scan_bus(sys->busnr, ops, sys);
} else { } else {
BUG();
bus = NULL; bus = NULL;
BUG();
} }
return bus; return bus;

2
arch/arm/plat-orion/Makefile
View File

@ -2,7 +2,7 @@
# Makefile for the linux kernel. # Makefile for the linux kernel.
# #
obj-y := irq.o obj-y := irq.o pcie.o
obj-m := obj-m :=
obj-n := obj-n :=
obj- := obj- :=

245
arch/arm/plat-orion/pcie.c Normal file
View File

@ -0,0 +1,245 @@
/*
* arch/arm/plat-orion/pcie.c
*
* Marvell Orion SoC PCIe handling.
*
* This file is licensed under the terms of the GNU General Public
* License version 2. This program is licensed "as is" without any
* warranty of any kind, whether express or implied.
*/
#include <linux/kernel.h>
#include <linux/pci.h>
#include <linux/mbus.h>
#include <asm/mach/pci.h>
#include <asm/plat-orion/pcie.h>
/*
* PCIe unit register offsets.
*/
#define PCIE_DEV_ID_OFF 0x0000
#define PCIE_CMD_OFF 0x0004
#define PCIE_DEV_REV_OFF 0x0008
#define PCIE_BAR_LO_OFF(n) (0x0010 + ((n) << 3))
#define PCIE_BAR_HI_OFF(n) (0x0014 + ((n) << 3))
#define PCIE_HEADER_LOG_4_OFF 0x0128
#define PCIE_BAR_CTRL_OFF(n) (0x1804 + ((n - 1) * 4))
#define PCIE_WIN04_CTRL_OFF(n) (0x1820 + ((n) << 4))
#define PCIE_WIN04_BASE_OFF(n) (0x1824 + ((n) << 4))
#define PCIE_WIN04_REMAP_OFF(n) (0x182c + ((n) << 4))
#define PCIE_WIN5_CTRL_OFF 0x1880
#define PCIE_WIN5_BASE_OFF 0x1884
#define PCIE_WIN5_REMAP_OFF 0x188c
#define PCIE_CONF_ADDR_OFF 0x18f8
#define PCIE_CONF_ADDR_EN 0x80000000
#define PCIE_CONF_REG(r) ((((r) & 0xf00) << 16) | ((r) & 0xfc))
#define PCIE_CONF_BUS(b) (((b) & 0xff) << 16)
#define PCIE_CONF_DEV(d) (((d) & 0x1f) << 11)
#define PCIE_CONF_FUNC(f) (((f) & 0x3) << 8)
#define PCIE_CONF_DATA_OFF 0x18fc
#define PCIE_MASK_OFF 0x1910
#define PCIE_CTRL_OFF 0x1a00
#define PCIE_STAT_OFF 0x1a04
#define PCIE_STAT_DEV_OFFS 20
#define PCIE_STAT_DEV_MASK 0x1f
#define PCIE_STAT_BUS_OFFS 8
#define PCIE_STAT_BUS_MASK 0xff
#define PCIE_STAT_LINK_DOWN 1
u32 __init orion_pcie_dev_id(void __iomem *base)
{
return readl(base + PCIE_DEV_ID_OFF) >> 16;
}
u32 __init orion_pcie_rev(void __iomem *base)
{
return readl(base + PCIE_DEV_REV_OFF) & 0xff;
}
int __init orion_pcie_link_up(void __iomem *base)
{
return !(readl(base + PCIE_STAT_OFF) & PCIE_STAT_LINK_DOWN);
}
int __init orion_pcie_get_local_bus_nr(void __iomem *base)
{
u32 stat = readl(base + PCIE_STAT_OFF);
return (stat >> PCIE_STAT_BUS_OFFS) & PCIE_STAT_BUS_MASK;
}
void __init orion_pcie_set_local_bus_nr(void __iomem *base, int nr)
{
u32 stat;
stat = readl(base + PCIE_STAT_OFF);
stat &= ~(PCIE_STAT_BUS_MASK << PCIE_STAT_BUS_OFFS);
stat |= nr << PCIE_STAT_BUS_OFFS;
writel(stat, base + PCIE_STAT_OFF);
}
/*
* Setup PCIE BARs and Address Decode Wins:
* BAR[0,2] -> disabled, BAR[1] -> covers all DRAM banks
* WIN[0-3] -> DRAM bank[0-3]
*/
static void __init orion_pcie_setup_wins(void __iomem *base,
struct mbus_dram_target_info *dram)
{
u32 size;
int i;
/*
* First, disable and clear BARs and windows.
*/
for (i = 1; i <= 2; i++) {
writel(0, base + PCIE_BAR_CTRL_OFF(i));
writel(0, base + PCIE_BAR_LO_OFF(i));
writel(0, base + PCIE_BAR_HI_OFF(i));
}
for (i = 0; i < 5; i++) {
writel(0, base + PCIE_WIN04_CTRL_OFF(i));
writel(0, base + PCIE_WIN04_BASE_OFF(i));
writel(0, base + PCIE_WIN04_REMAP_OFF(i));
}
writel(0, base + PCIE_WIN5_CTRL_OFF);
writel(0, base + PCIE_WIN5_BASE_OFF);
writel(0, base + PCIE_WIN5_REMAP_OFF);
/*
* Setup windows for DDR banks. Count total DDR size on the fly.
*/
size = 0;
for (i = 0; i < dram->num_cs; i++) {
struct mbus_dram_window *cs = dram->cs + i;
writel(cs->base & 0xffff0000, base + PCIE_WIN04_BASE_OFF(i));
writel(0, base + PCIE_WIN04_REMAP_OFF(i));
writel(((cs->size - 1) & 0xffff0000) |
(cs->mbus_attr << 8) |
(dram->mbus_dram_target_id << 4) | 1,
base + PCIE_WIN04_CTRL_OFF(i));
size += cs->size;
}
/*
* Setup BAR[1] to all DRAM banks.
*/
writel(dram->cs[0].base, base + PCIE_BAR_LO_OFF(1));
writel(0, base + PCIE_BAR_HI_OFF(1));
writel(((size - 1) & 0xffff0000) | 1, base + PCIE_BAR_CTRL_OFF(1));
}
void __init orion_pcie_setup(void __iomem *base,
struct mbus_dram_target_info *dram)
{
u16 cmd;
u32 mask;
/*
* Point PCIe unit MBUS decode windows to DRAM space.
*/
orion_pcie_setup_wins(base, dram);
/*
* Master + slave enable.
*/
cmd = readw(base + PCIE_CMD_OFF);
cmd |= PCI_COMMAND_IO;
cmd |= PCI_COMMAND_MEMORY;
cmd |= PCI_COMMAND_MASTER;
writew(cmd, base + PCIE_CMD_OFF);
/*
* Enable interrupt lines A-D.
*/
mask = readl(base + PCIE_MASK_OFF);
mask |= 0x0f000000;
writel(mask, base + PCIE_MASK_OFF);
}
int orion_pcie_rd_conf(void __iomem *base, struct pci_bus *bus,
u32 devfn, int where, int size, u32 *val)
{
writel(PCIE_CONF_BUS(bus->number) |
PCIE_CONF_DEV(PCI_SLOT(devfn)) |
PCIE_CONF_FUNC(PCI_FUNC(devfn)) |
PCIE_CONF_REG(where) | PCIE_CONF_ADDR_EN,
base + PCIE_CONF_ADDR_OFF);
*val = readl(base + PCIE_CONF_DATA_OFF);
if (size == 1)
*val = (*val >> (8 * (where & 3))) & 0xff;
else if (size == 2)
*val = (*val >> (8 * (where & 3))) & 0xffff;
return PCIBIOS_SUCCESSFUL;
}
int orion_pcie_rd_conf_tlp(void __iomem *base, struct pci_bus *bus,
u32 devfn, int where, int size, u32 *val)
{
writel(PCIE_CONF_BUS(bus->number) |
PCIE_CONF_DEV(PCI_SLOT(devfn)) |
PCIE_CONF_FUNC(PCI_FUNC(devfn)) |
PCIE_CONF_REG(where) | PCIE_CONF_ADDR_EN,
base + PCIE_CONF_ADDR_OFF);
*val = readl(base + PCIE_CONF_DATA_OFF);
if (bus->number != orion_pcie_get_local_bus_nr(base) ||
PCI_FUNC(devfn) != 0)
*val = readl(base + PCIE_HEADER_LOG_4_OFF);
if (size == 1)
*val = (*val >> (8 * (where & 3))) & 0xff;
else if (size == 2)
*val = (*val >> (8 * (where & 3))) & 0xffff;
return PCIBIOS_SUCCESSFUL;
}
int orion_pcie_rd_conf_wa(void __iomem *wa_base, struct pci_bus *bus,
u32 devfn, int where, int size, u32 *val)
{
*val = readl(wa_base + (PCIE_CONF_BUS(bus->number) |
PCIE_CONF_DEV(PCI_SLOT(devfn)) |
PCIE_CONF_FUNC(PCI_FUNC(devfn)) |
PCIE_CONF_REG(where)));
if (size == 1)
*val = (*val >> (8 * (where & 3))) & 0xff;
else if (size == 2)
*val = (*val >> (8 * (where & 3))) & 0xffff;
return PCIBIOS_SUCCESSFUL;
}
int orion_pcie_wr_conf(void __iomem *base, struct pci_bus *bus,
u32 devfn, int where, int size, u32 val)
{
int ret = PCIBIOS_SUCCESSFUL;
writel(PCIE_CONF_BUS(bus->number) |
PCIE_CONF_DEV(PCI_SLOT(devfn)) |
PCIE_CONF_FUNC(PCI_FUNC(devfn)) |
PCIE_CONF_REG(where) | PCIE_CONF_ADDR_EN,
base + PCIE_CONF_ADDR_OFF);
if (size == 4) {
writel(val, base + PCIE_CONF_DATA_OFF);
} else if (size == 2) {
writew(val, base + PCIE_CONF_DATA_OFF + (where & 3));
} else if (size == 1) {
writeb(val, base + PCIE_CONF_DATA_OFF + (where & 3));
} else {
ret = PCIBIOS_BAD_REGISTER_NUMBER;
}
return ret;
}

31
include/asm-arm/plat-orion/pcie.h Normal file
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/*
* include/asm-arm/plat-orion/pcie.h
*
* Marvell Orion SoC PCIe handling.
*
* This file is licensed under the terms of the GNU General Public
* License version 2. This program is licensed "as is" without any
* warranty of any kind, whether express or implied.
*/
#ifndef __ASM_PLAT_ORION_PCIE_H
#define __ASM_PLAT_ORION_PCIE_H
u32 orion_pcie_dev_id(void __iomem *base);
u32 orion_pcie_rev(void __iomem *base);
int orion_pcie_link_up(void __iomem *base);
int orion_pcie_get_local_bus_nr(void __iomem *base);
void orion_pcie_set_local_bus_nr(void __iomem *base, int nr);
void orion_pcie_setup(void __iomem *base,
struct mbus_dram_target_info *dram);
int orion_pcie_rd_conf(void __iomem *base, struct pci_bus *bus,
u32 devfn, int where, int size, u32 *val);
int orion_pcie_rd_conf_tlp(void __iomem *base, struct pci_bus *bus,
u32 devfn, int where, int size, u32 *val);
int orion_pcie_rd_conf_wa(void __iomem *wa_base, struct pci_bus *bus,
u32 devfn, int where, int size, u32 *val);
int orion_pcie_wr_conf(void __iomem *base, struct pci_bus *bus,
u32 devfn, int where, int size, u32 val);
#endif