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-rw-r--r--arch/arm/mach-orion/common.h4
-rw-r--r--arch/arm/mach-orion/pci.c343
-rw-r--r--arch/arm/plat-orion/Makefile2
-rw-r--r--arch/arm/plat-orion/pcie.c245
4 files changed, 334 insertions, 260 deletions
diff --git a/arch/arm/mach-orion/common.h b/arch/arm/mach-orion/common.h
index b676be0a4a8..9a5afefac4d 100644
--- a/arch/arm/mach-orion/common.h
+++ b/arch/arm/mach-orion/common.h
@@ -43,8 +43,8 @@ struct pci_sys_data;
struct pci_bus;
void orion_pcie_id(u32 *dev, u32 *rev);
-u32 orion_pcie_local_bus_nr(void);
-u32 orion_pci_local_bus_nr(void);
+int orion_pcie_local_bus_nr(void);
+int orion_pci_local_bus_nr(void);
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);
diff --git a/arch/arm/mach-orion/pci.c b/arch/arm/mach-orion/pci.c
index cfd3d064c20..5240a245c7e 100644
--- a/arch/arm/mach-orion/pci.c
+++ b/arch/arm/mach-orion/pci.c
@@ -14,6 +14,7 @@
#include <linux/pci.h>
#include <linux/mbus.h>
#include <asm/mach/pci.h>
+#include <asm/plat-orion/pcie.h>
#include "common.h"
/*****************************************************************************
@@ -32,288 +33,136 @@
/*****************************************************************************
* PCIE controller
****************************************************************************/
-#define PCIE_CTRL ORION_PCIE_REG(0x1a00)
-#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)
-
-/*
- * PCIE_STAT bits
- */
-#define PCIE_STAT_LINK_DOWN 1
-#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)
-
-/*
- * PCIE_CONF_ADDR bits
- */
-#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)
-
-/*
- * PCIE Address Decode Windows registers
- */
-#define PCIE_BAR_CTRL(n) ORION_PCIE_REG(0x1804 + ((n - 1) * 4))
-#define PCIE_BAR_LO(n) ORION_PCIE_REG(0x0010 + ((n) * 8))
-#define PCIE_BAR_HI(n) ORION_PCIE_REG(0x0014 + ((n) * 8))
-#define PCIE_WIN_CTRL(n) (((n) < 5) ? \
- ORION_PCIE_REG(0x1820 + ((n) << 4)) : \
- ORION_PCIE_REG(0x1880))
-#define PCIE_WIN_BASE(n) (((n) < 5) ? \
- ORION_PCIE_REG(0x1824 + ((n) << 4)) : \
- ORION_PCIE_REG(0x1884))
-#define PCIE_WIN_REMAP(n) (((n) < 5) ? \
- ORION_PCIE_REG(0x182c + ((n) << 4)) : \
- 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
- * and then reading the PCIE_CONF_DATA register. Need to make sure these
- * transactions are atomic.
- */
-static DEFINE_SPINLOCK(orion_pcie_lock);
+#define PCIE_BASE ((void __iomem *)ORION_PCIE_VIRT_BASE)
void orion_pcie_id(u32 *dev, u32 *rev)
{
- *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);
+ *dev = orion_pcie_dev_id(PCIE_BASE);
+ *rev = orion_pcie_rev(PCIE_BASE);
}
-/*
- * 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)
+int orion_pcie_local_bus_nr(void)
{
- 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));
+ return orion_pcie_get_local_bus_nr(PCIE_BASE);
}
-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)
+static int pcie_valid_config(int bus, int dev)
{
/*
* Don't go out when trying to access --
- * 1. our own device
+ * 1. our own device / nonexisting device on local bus
* 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())
+ if (bus == 0 && dev != 1)
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)))
+ if (!orion_pcie_link_up(PCIE_BASE))
return 0;
return 1;
}
-static int orion_pcie_rd_conf(struct pci_bus *bus, u32 devfn, int where,
- int size, u32 *val)
+
+/*
+ * PCIE config cycles are done by programming the PCIE_CONF_ADDR register
+ * and then reading the PCIE_CONF_DATA register. Need to make sure these
+ * transactions are atomic.
+ */
+static DEFINE_SPINLOCK(orion_pcie_lock);
+
+static int pcie_rd_conf(struct pci_bus *bus, u32 devfn, int where,
+ int size, u32 *val)
{
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;
return PCIBIOS_DEVICE_NOT_FOUND;
}
spin_lock_irqsave(&orion_pcie_lock, flags);
+ ret = orion_pcie_rd_conf(PCIE_BASE, bus, devfn, where, size, val);
+ spin_unlock_irqrestore(&orion_pcie_lock, flags);
- 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);
+ return ret;
+}
- 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);
+static int pcie_rd_conf_wa(struct pci_bus *bus, u32 devfn,
+ int where, int size, u32 *val)
+{
+ int ret;
- if (size == 1)
- *val = (*val >> (8*(where & 0x3))) & 0xff;
- else if (size == 2)
- *val = (*val >> (8*(where & 0x3))) & 0xffff;
+ if (pcie_valid_config(bus->number, PCI_SLOT(devfn)) == 0) {
+ *val = 0xffffffff;
+ return PCIBIOS_DEVICE_NOT_FOUND;
+ }
- spin_unlock_irqrestore(&orion_pcie_lock, flags);
+ /*
+ * 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;
+ }
- return PCIBIOS_SUCCESSFUL;
-}
+ ret = orion_pcie_rd_conf_wa((void __iomem *)ORION_PCIE_WA_VIRT_BASE,
+ bus, devfn, where, size, val);
+ return ret;
+}
-static int orion_pcie_wr_conf(struct pci_bus *bus, u32 devfn, int where,
- int size, u32 val)
+static int 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)
+ if (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;
- }
-
+ ret = orion_pcie_wr_conf(PCIE_BASE, bus, devfn, where, size, val);
spin_unlock_irqrestore(&orion_pcie_lock, flags);
return ret;
}
-struct pci_ops orion_pcie_ops = {
- .read = orion_pcie_rd_conf,
- .write = orion_pcie_wr_conf,
+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;
+ int dev;
/*
- * Point PCIe unit MBUS decode windows to DRAM space.
- */
- orion_setup_pcie_wins(&orion_mbus_dram_info);
-
- /*
- * Master + Slave enable
+ * Generic PCIe unit setup.
*/
- orion_pcie_master_slave_enable();
+ orion_pcie_setup(PCIE_BASE, &orion_mbus_dram_info);
/*
- * Enable interrupts lines A-D
+ * Check whether to apply Orion-1/Orion-NAS PCIe config
+ * read transaction workaround.
*/
- orion_pcie_enable_interrupts();
+ 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;
+ }
/*
- * Request resource
+ * Request resources.
*/
res = kzalloc(sizeof(struct resource) * 2, GFP_KERNEL);
if (!res)
- panic("orion_pci_setup unable to alloc resources");
+ panic("pcie_setup unable to alloc resources");
/*
* IORESOURCE_IO
@@ -417,19 +266,19 @@ static int orion_pcie_setup(struct pci_sys_data *sys)
*/
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);
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);
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)
{
unsigned long flags;
@@ -451,7 +300,7 @@ static int orion_pci_hw_rd_conf(u32 bus, u32 dev, u32 func,
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)
{
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);
}
-struct pci_ops orion_pci_ops = {
+struct pci_ops pci_ops = {
.read = orion_pci_rd_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)
{
- u32 bus_nr, dev_nr, func, reg, val;
+ int bus_nr, dev_nr, func, reg;
+ u32 val;
bus_nr = orion_pci_local_bus_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)
{
u32 win_enable;
- u32 bus;
- u32 dev;
+ int bus;
+ int dev;
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);
}
-static int orion_pci_setup(struct pci_sys_data *sys)
+static int pci_setup(struct pci_sys_data *sys)
{
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);
if (!res)
- panic("orion_pci_setup unable to alloc resources");
+ panic("pci_setup unable to alloc resources");
/*
* IORESOURCE_IO
@@ -674,16 +524,11 @@ int orion_pci_sys_setup(int nr, struct pci_sys_data *sys)
int ret = 0;
if (nr == 0) {
- /*
- * PCIE setup
- */
- orion_pcie_set_bus_nr(0);
- ret = orion_pcie_setup(sys);
+ orion_pcie_set_local_bus_nr(PCIE_BASE, sys->busnr);
+ ret = pcie_setup(sys);
} else if (nr == 1) {
- /*
- * PCI setup
- */
- ret = orion_pci_setup(sys);
+ orion_pci_set_bus_nr(sys->busnr);
+ ret = pci_setup(sys);
}
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_ops *ops;
struct pci_bus *bus;
-
if (nr == 0) {
- u32 pci_bus;
- /*
- * 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);
+ bus = pci_scan_bus(sys->busnr, &pcie_ops, sys);
} else if (nr == 1) {
- /*
- * PCI scan
- */
- ops = &orion_pci_ops;
- bus = pci_scan_bus(sys->busnr, ops, sys);
+ bus = pci_scan_bus(sys->busnr, &pci_ops, sys);
} else {
- BUG();
bus = NULL;
+ BUG();
}
return bus;
diff --git a/arch/arm/plat-orion/Makefile b/arch/arm/plat-orion/Makefile
index ea4ce342a19..b33ecb60183 100644
--- a/arch/arm/plat-orion/Makefile
+++ b/arch/arm/plat-orion/Makefile
@@ -2,7 +2,7 @@
# Makefile for the linux kernel.
#
-obj-y := irq.o
+obj-y := irq.o pcie.o
obj-m :=
obj-n :=
obj- :=
diff --git a/arch/arm/plat-orion/pcie.c b/arch/arm/plat-orion/pcie.c
new file mode 100644
index 00000000000..f01966a330e
--- /dev/null
+++ b/arch/arm/plat-orion/pcie.c
@@ -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;
+}
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2024-12-24 01:13:37 +0000