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path: root/arch/sh/drivers/pci/pcie-sh7786.c
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Diffstat (limited to 'arch/sh/drivers/pci/pcie-sh7786.c')
-rw-r--r--arch/sh/drivers/pci/pcie-sh7786.c103
1 files changed, 66 insertions, 37 deletions
diff --git a/arch/sh/drivers/pci/pcie-sh7786.c b/arch/sh/drivers/pci/pcie-sh7786.c
index a162a7f86b2e..a78b9a935585 100644
--- a/arch/sh/drivers/pci/pcie-sh7786.c
+++ b/arch/sh/drivers/pci/pcie-sh7786.c
@@ -1,11 +1,8 @@
+// SPDX-License-Identifier: GPL-2.0
/*
* Low-Level PCI Express Support for the SH7786
*
* Copyright (C) 2009 - 2011 Paul Mundt
- *
- * This file is subject to the terms and conditions of the GNU General Public
- * License. See the file "COPYING" in the main directory of this archive
- * for more details.
*/
#define pr_fmt(fmt) "PCI: " fmt
@@ -15,12 +12,14 @@
#include <linux/io.h>
#include <linux/async.h>
#include <linux/delay.h>
+#include <linux/dma-map-ops.h>
#include <linux/slab.h>
#include <linux/clk.h>
#include <linux/sh_clk.h>
#include <linux/sh_intc.h>
+#include <cpu/sh7786.h>
#include "pcie-sh7786.h"
-#include <asm/sizes.h>
+#include <linux/sizes.h>
struct sh7786_pcie_port {
struct pci_channel *hose;
@@ -32,6 +31,8 @@ struct sh7786_pcie_port {
static struct sh7786_pcie_port *sh7786_pcie_ports;
static unsigned int nr_ports;
+size_t memsize;
+u64 memstart;
static struct sh7786_pcie_hwops {
int (*core_init)(void);
@@ -40,73 +41,73 @@ static struct sh7786_pcie_hwops {
static struct resource sh7786_pci0_resources[] = {
{
- .name = "PCIe0 IO",
+ .name = "PCIe0 MEM 0",
.start = 0xfd000000,
.end = 0xfd000000 + SZ_8M - 1,
- .flags = IORESOURCE_IO,
+ .flags = IORESOURCE_MEM,
}, {
- .name = "PCIe0 MEM 0",
+ .name = "PCIe0 MEM 1",
.start = 0xc0000000,
.end = 0xc0000000 + SZ_512M - 1,
.flags = IORESOURCE_MEM | IORESOURCE_MEM_32BIT,
}, {
- .name = "PCIe0 MEM 1",
+ .name = "PCIe0 MEM 2",
.start = 0x10000000,
.end = 0x10000000 + SZ_64M - 1,
.flags = IORESOURCE_MEM,
}, {
- .name = "PCIe0 MEM 2",
+ .name = "PCIe0 IO",
.start = 0xfe100000,
.end = 0xfe100000 + SZ_1M - 1,
- .flags = IORESOURCE_MEM,
+ .flags = IORESOURCE_IO,
},
};
static struct resource sh7786_pci1_resources[] = {
{
- .name = "PCIe1 IO",
+ .name = "PCIe1 MEM 0",
.start = 0xfd800000,
.end = 0xfd800000 + SZ_8M - 1,
- .flags = IORESOURCE_IO,
+ .flags = IORESOURCE_MEM,
}, {
- .name = "PCIe1 MEM 0",
+ .name = "PCIe1 MEM 1",
.start = 0xa0000000,
.end = 0xa0000000 + SZ_512M - 1,
.flags = IORESOURCE_MEM | IORESOURCE_MEM_32BIT,
}, {
- .name = "PCIe1 MEM 1",
+ .name = "PCIe1 MEM 2",
.start = 0x30000000,
.end = 0x30000000 + SZ_256M - 1,
.flags = IORESOURCE_MEM | IORESOURCE_MEM_32BIT,
}, {
- .name = "PCIe1 MEM 2",
+ .name = "PCIe1 IO",
.start = 0xfe300000,
.end = 0xfe300000 + SZ_1M - 1,
- .flags = IORESOURCE_MEM,
+ .flags = IORESOURCE_IO,
},
};
static struct resource sh7786_pci2_resources[] = {
{
- .name = "PCIe2 IO",
+ .name = "PCIe2 MEM 0",
.start = 0xfc800000,
.end = 0xfc800000 + SZ_4M - 1,
- .flags = IORESOURCE_IO,
+ .flags = IORESOURCE_MEM,
}, {
- .name = "PCIe2 MEM 0",
+ .name = "PCIe2 MEM 1",
.start = 0x80000000,
.end = 0x80000000 + SZ_512M - 1,
.flags = IORESOURCE_MEM | IORESOURCE_MEM_32BIT,
}, {
- .name = "PCIe2 MEM 1",
+ .name = "PCIe2 MEM 2",
.start = 0x20000000,
.end = 0x20000000 + SZ_256M - 1,
.flags = IORESOURCE_MEM | IORESOURCE_MEM_32BIT,
}, {
- .name = "PCIe2 MEM 2",
+ .name = "PCIe2 IO",
.start = 0xfcd00000,
.end = 0xfcd00000 + SZ_1M - 1,
- .flags = IORESOURCE_MEM,
+ .flags = IORESOURCE_IO,
},
};
@@ -138,12 +139,12 @@ static void sh7786_pci_fixup(struct pci_dev *dev)
* Prevent enumeration of root complex resources.
*/
if (pci_is_root_bus(dev->bus) && dev->devfn == 0) {
- int i;
+ struct resource *r;
- for (i = 0; i < DEVICE_COUNT_RESOURCE; i++) {
- dev->resource[i].start = 0;
- dev->resource[i].end = 0;
- dev->resource[i].flags = 0;
+ pci_dev_for_each_resource(dev, r) {
+ r->start = 0;
+ r->end = 0;
+ r->flags = 0;
}
}
}
@@ -301,8 +302,7 @@ static int __init pcie_init(struct sh7786_pcie_port *port)
{
struct pci_channel *chan = port->hose;
unsigned int data;
- phys_addr_t memphys;
- size_t memsize;
+ phys_addr_t memstart, memend;
int ret, i, win;
/* Begin initialization */
@@ -313,7 +313,7 @@ static int __init pcie_init(struct sh7786_pcie_port *port)
* class to match. Hardware takes care of propagating the IDSETR
* settings, so there is no need to bother with a quirk.
*/
- pci_write_reg(chan, PCI_CLASS_BRIDGE_PCI << 16, SH4A_PCIEIDSETR1);
+ pci_write_reg(chan, PCI_CLASS_BRIDGE_PCI_NORMAL << 8, SH4A_PCIEIDSETR1);
/* Initialize default capabilities. */
data = pci_read_reg(chan, SH4A_PCIEEXPCAP0);
@@ -357,15 +357,24 @@ static int __init pcie_init(struct sh7786_pcie_port *port)
data |= (0xff << 16);
pci_write_reg(chan, data, SH4A_PCIEMACCTLR);
- memphys = __pa(memory_start);
- memsize = roundup_pow_of_two(memory_end - memory_start);
+ memstart = __pa(memory_start);
+ memend = __pa(memory_end);
+ memsize = roundup_pow_of_two(memend - memstart);
+
+ /*
+ * The start address must be aligned on its size. So we round
+ * it down, and then recalculate the size so that it covers
+ * the entire memory.
+ */
+ memstart = ALIGN_DOWN(memstart, memsize);
+ memsize = roundup_pow_of_two(memend - memstart);
/*
* If there's more than 512MB of memory, we need to roll over to
* LAR1/LAMR1.
*/
if (memsize > SZ_512M) {
- pci_write_reg(chan, memphys + SZ_512M, SH4A_PCIELAR1);
+ pci_write_reg(chan, memstart + SZ_512M, SH4A_PCIELAR1);
pci_write_reg(chan, ((memsize - SZ_512M) - SZ_256) | 1,
SH4A_PCIELAMR1);
memsize = SZ_512M;
@@ -381,7 +390,7 @@ static int __init pcie_init(struct sh7786_pcie_port *port)
* LAR0/LAMR0 covers up to the first 512MB, which is enough to
* cover all of lowmem on most platforms.
*/
- pci_write_reg(chan, memphys, SH4A_PCIELAR0);
+ pci_write_reg(chan, memstart, SH4A_PCIELAR0);
pci_write_reg(chan, (memsize - SZ_256) | 1, SH4A_PCIELAMR0);
/* Finish initialization */
@@ -438,6 +447,9 @@ static int __init pcie_init(struct sh7786_pcie_port *port)
* mode, so just skip them entirely.
*/
if ((res->flags & IORESOURCE_MEM_32BIT) && __in_29bit_mode())
+ res->flags |= IORESOURCE_DISABLED;
+
+ if (res->flags & IORESOURCE_DISABLED)
continue;
pci_write_reg(chan, 0x00000000, SH4A_PCIEPTCTLR(win));
@@ -467,11 +479,17 @@ static int __init pcie_init(struct sh7786_pcie_port *port)
return 0;
}
-int __init pcibios_map_platform_irq(const struct pci_dev *pdev, u8 slot, u8 pin)
+int pcibios_map_platform_irq(const struct pci_dev *pdev, u8 slot, u8 pin)
{
return evt2irq(0xae0);
}
+void pcibios_bus_add_device(struct pci_dev *pdev)
+{
+ dma_direct_set_offset(&pdev->dev, __pa(memory_start),
+ __pa(memory_start) - memstart, memsize);
+}
+
static int __init sh7786_pcie_core_init(void)
{
/* Return the number of ports */
@@ -527,6 +545,7 @@ static struct sh7786_pcie_hwops sh7786_65nm_pcie_hwops __initdata = {
static int __init sh7786_pcie_init(void)
{
struct clk *platclk;
+ u32 mm_sel;
int i;
printk(KERN_NOTICE "PCI: Starting initialization.\n");
@@ -539,7 +558,7 @@ static int __init sh7786_pcie_init(void)
if (unlikely(nr_ports == 0))
return -ENODEV;
- sh7786_pcie_ports = kzalloc(nr_ports * sizeof(struct sh7786_pcie_port),
+ sh7786_pcie_ports = kcalloc(nr_ports, sizeof(struct sh7786_pcie_port),
GFP_KERNEL);
if (unlikely(!sh7786_pcie_ports))
return -ENOMEM;
@@ -560,6 +579,16 @@ static int __init sh7786_pcie_init(void)
clk_enable(platclk);
+ mm_sel = sh7786_mm_sel();
+
+ /*
+ * Depending on the MMSELR register value, the PCIe0 MEM 1
+ * area may not be available. See Table 13.11 of the SH7786
+ * datasheet.
+ */
+ if (mm_sel != 1 && mm_sel != 2 && mm_sel != 5 && mm_sel != 6)
+ sh7786_pci0_resources[2].flags |= IORESOURCE_DISABLED;
+
printk(KERN_NOTICE "PCI: probing %d ports.\n", nr_ports);
for (i = 0; i < nr_ports; i++) {
generated by cgit (git 2.34.1) at 2025-12-26 00:30:11 +0000