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path: root/drivers/pci/host/pcie-rcar.c
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Diffstat (limited to 'drivers/pci/host/pcie-rcar.c')
-rw-r--r--drivers/pci/host/pcie-rcar.c158
1 files changed, 72 insertions, 86 deletions
diff --git a/drivers/pci/host/pcie-rcar.c b/drivers/pci/host/pcie-rcar.c
index f7d3de32c9a0..4884ee5e07d4 100644
--- a/drivers/pci/host/pcie-rcar.c
+++ b/drivers/pci/host/pcie-rcar.c
@@ -105,7 +105,7 @@
#define PCIE_CONF_DEV(d) (((d) & 0x1f) << 19)
#define PCIE_CONF_FUNC(f) (((f) & 0x7) << 16)
-#define PCI_MAX_RESOURCES 4
+#define RCAR_PCI_MAX_RESOURCES 4
#define MAX_NR_INBOUND_MAPS 6
struct rcar_msi {
@@ -127,7 +127,7 @@ static inline struct rcar_msi *to_rcar_msi(struct msi_chip *chip)
struct rcar_pcie {
struct device *dev;
void __iomem *base;
- struct resource res[PCI_MAX_RESOURCES];
+ struct resource res[RCAR_PCI_MAX_RESOURCES];
struct resource busn;
int root_bus_nr;
struct clk *clk;
@@ -140,36 +140,37 @@ static inline struct rcar_pcie *sys_to_pcie(struct pci_sys_data *sys)
return sys->private_data;
}
-static void pci_write_reg(struct rcar_pcie *pcie, unsigned long val,
- unsigned long reg)
+static void rcar_pci_write_reg(struct rcar_pcie *pcie, unsigned long val,
+ unsigned long reg)
{
writel(val, pcie->base + reg);
}
-static unsigned long pci_read_reg(struct rcar_pcie *pcie, unsigned long reg)
+static unsigned long rcar_pci_read_reg(struct rcar_pcie *pcie,
+ unsigned long reg)
{
return readl(pcie->base + reg);
}
enum {
- PCI_ACCESS_READ,
- PCI_ACCESS_WRITE,
+ RCAR_PCI_ACCESS_READ,
+ RCAR_PCI_ACCESS_WRITE,
};
static void rcar_rmw32(struct rcar_pcie *pcie, int where, u32 mask, u32 data)
{
int shift = 8 * (where & 3);
- u32 val = pci_read_reg(pcie, where & ~3);
+ u32 val = rcar_pci_read_reg(pcie, where & ~3);
val &= ~(mask << shift);
val |= data << shift;
- pci_write_reg(pcie, val, where & ~3);
+ rcar_pci_write_reg(pcie, val, where & ~3);
}
static u32 rcar_read_conf(struct rcar_pcie *pcie, int where)
{
int shift = 8 * (where & 3);
- u32 val = pci_read_reg(pcie, where & ~3);
+ u32 val = rcar_pci_read_reg(pcie, where & ~3);
return val >> shift;
}
@@ -205,14 +206,14 @@ static int rcar_pcie_config_access(struct rcar_pcie *pcie,
if (dev != 0)
return PCIBIOS_DEVICE_NOT_FOUND;
- if (access_type == PCI_ACCESS_READ) {
- *data = pci_read_reg(pcie, PCICONF(index));
+ if (access_type == RCAR_PCI_ACCESS_READ) {
+ *data = rcar_pci_read_reg(pcie, PCICONF(index));
} else {
/* Keep an eye out for changes to the root bus number */
if (pci_is_root_bus(bus) && (reg == PCI_PRIMARY_BUS))
pcie->root_bus_nr = *data & 0xff;
- pci_write_reg(pcie, *data, PCICONF(index));
+ rcar_pci_write_reg(pcie, *data, PCICONF(index));
}
return PCIBIOS_SUCCESSFUL;
@@ -222,20 +223,20 @@ static int rcar_pcie_config_access(struct rcar_pcie *pcie,
return PCIBIOS_DEVICE_NOT_FOUND;
/* Clear errors */
- pci_write_reg(pcie, pci_read_reg(pcie, PCIEERRFR), PCIEERRFR);
+ rcar_pci_write_reg(pcie, rcar_pci_read_reg(pcie, PCIEERRFR), PCIEERRFR);
/* Set the PIO address */
- pci_write_reg(pcie, PCIE_CONF_BUS(bus->number) | PCIE_CONF_DEV(dev) |
- PCIE_CONF_FUNC(func) | reg, PCIECAR);
+ rcar_pci_write_reg(pcie, PCIE_CONF_BUS(bus->number) |
+ PCIE_CONF_DEV(dev) | PCIE_CONF_FUNC(func) | reg, PCIECAR);
/* Enable the configuration access */
if (bus->parent->number == pcie->root_bus_nr)
- pci_write_reg(pcie, CONFIG_SEND_ENABLE | TYPE0, PCIECCTLR);
+ rcar_pci_write_reg(pcie, CONFIG_SEND_ENABLE | TYPE0, PCIECCTLR);
else
- pci_write_reg(pcie, CONFIG_SEND_ENABLE | TYPE1, PCIECCTLR);
+ rcar_pci_write_reg(pcie, CONFIG_SEND_ENABLE | TYPE1, PCIECCTLR);
/* Check for errors */
- if (pci_read_reg(pcie, PCIEERRFR) & UNSUPPORTED_REQUEST)
+ if (rcar_pci_read_reg(pcie, PCIEERRFR) & UNSUPPORTED_REQUEST)
return PCIBIOS_DEVICE_NOT_FOUND;
/* Check for master and target aborts */
@@ -243,13 +244,13 @@ static int rcar_pcie_config_access(struct rcar_pcie *pcie,
(PCI_STATUS_REC_MASTER_ABORT | PCI_STATUS_REC_TARGET_ABORT))
return PCIBIOS_DEVICE_NOT_FOUND;
- if (access_type == PCI_ACCESS_READ)
- *data = pci_read_reg(pcie, PCIECDR);
+ if (access_type == RCAR_PCI_ACCESS_READ)
+ *data = rcar_pci_read_reg(pcie, PCIECDR);
else
- pci_write_reg(pcie, *data, PCIECDR);
+ rcar_pci_write_reg(pcie, *data, PCIECDR);
/* Disable the configuration access */
- pci_write_reg(pcie, 0, PCIECCTLR);
+ rcar_pci_write_reg(pcie, 0, PCIECCTLR);
return PCIBIOS_SUCCESSFUL;
}
@@ -260,12 +261,7 @@ static int rcar_pcie_read_conf(struct pci_bus *bus, unsigned int devfn,
struct rcar_pcie *pcie = sys_to_pcie(bus->sysdata);
int ret;
- if ((size == 2) && (where & 1))
- return PCIBIOS_BAD_REGISTER_NUMBER;
- else if ((size == 4) && (where & 3))
- return PCIBIOS_BAD_REGISTER_NUMBER;
-
- ret = rcar_pcie_config_access(pcie, PCI_ACCESS_READ,
+ ret = rcar_pcie_config_access(pcie, RCAR_PCI_ACCESS_READ,
bus, devfn, where, val);
if (ret != PCIBIOS_SUCCESSFUL) {
*val = 0xffffffff;
@@ -291,12 +287,7 @@ static int rcar_pcie_write_conf(struct pci_bus *bus, unsigned int devfn,
int shift, ret;
u32 data;
- if ((size == 2) && (where & 1))
- return PCIBIOS_BAD_REGISTER_NUMBER;
- else if ((size == 4) && (where & 3))
- return PCIBIOS_BAD_REGISTER_NUMBER;
-
- ret = rcar_pcie_config_access(pcie, PCI_ACCESS_READ,
+ ret = rcar_pcie_config_access(pcie, RCAR_PCI_ACCESS_READ,
bus, devfn, where, &data);
if (ret != PCIBIOS_SUCCESSFUL)
return ret;
@@ -315,7 +306,7 @@ static int rcar_pcie_write_conf(struct pci_bus *bus, unsigned int devfn,
} else
data = val;
- ret = rcar_pcie_config_access(pcie, PCI_ACCESS_WRITE,
+ ret = rcar_pcie_config_access(pcie, RCAR_PCI_ACCESS_WRITE,
bus, devfn, where, &data);
return ret;
@@ -326,14 +317,15 @@ static struct pci_ops rcar_pcie_ops = {
.write = rcar_pcie_write_conf,
};
-static void rcar_pcie_setup_window(int win, struct resource *res,
- struct rcar_pcie *pcie)
+static void rcar_pcie_setup_window(int win, struct rcar_pcie *pcie)
{
+ struct resource *res = &pcie->res[win];
+
/* Setup PCIe address space mappings for each resource */
resource_size_t size;
u32 mask;
- pci_write_reg(pcie, 0x00000000, PCIEPTCTLR(win));
+ rcar_pci_write_reg(pcie, 0x00000000, PCIEPTCTLR(win));
/*
* The PAMR mask is calculated in units of 128Bytes, which
@@ -341,17 +333,17 @@ static void rcar_pcie_setup_window(int win, struct resource *res,
*/
size = resource_size(res);
mask = (roundup_pow_of_two(size) / SZ_128) - 1;
- pci_write_reg(pcie, mask << 7, PCIEPAMR(win));
+ rcar_pci_write_reg(pcie, mask << 7, PCIEPAMR(win));
- pci_write_reg(pcie, upper_32_bits(res->start), PCIEPARH(win));
- pci_write_reg(pcie, lower_32_bits(res->start), PCIEPARL(win));
+ rcar_pci_write_reg(pcie, upper_32_bits(res->start), PCIEPARH(win));
+ rcar_pci_write_reg(pcie, lower_32_bits(res->start), PCIEPARL(win));
/* First resource is for IO */
mask = PAR_ENABLE;
if (res->flags & IORESOURCE_IO)
mask |= IO_SPACE;
- pci_write_reg(pcie, mask, PCIEPTCTLR(win));
+ rcar_pci_write_reg(pcie, mask, PCIEPTCTLR(win));
}
static int rcar_pcie_setup(int nr, struct pci_sys_data *sys)
@@ -363,13 +355,13 @@ static int rcar_pcie_setup(int nr, struct pci_sys_data *sys)
pcie->root_bus_nr = -1;
/* Setup PCI resources */
- for (i = 0; i < PCI_MAX_RESOURCES; i++) {
+ for (i = 0; i < RCAR_PCI_MAX_RESOURCES; i++) {
res = &pcie->res[i];
if (!res->flags)
continue;
- rcar_pcie_setup_window(i, res, pcie);
+ rcar_pcie_setup_window(i, pcie);
if (res->flags & IORESOURCE_IO)
pci_ioremap_io(nr * SZ_64K, res->start);
@@ -415,7 +407,7 @@ static int phy_wait_for_ack(struct rcar_pcie *pcie)
unsigned int timeout = 100;
while (timeout--) {
- if (pci_read_reg(pcie, H1_PCIEPHYADRR) & PHY_ACK)
+ if (rcar_pci_read_reg(pcie, H1_PCIEPHYADRR) & PHY_ACK)
return 0;
udelay(100);
@@ -438,15 +430,15 @@ static void phy_write_reg(struct rcar_pcie *pcie,
((addr & 0xff) << ADR_POS);
/* Set write data */
- pci_write_reg(pcie, data, H1_PCIEPHYDOUTR);
- pci_write_reg(pcie, phyaddr, H1_PCIEPHYADRR);
+ rcar_pci_write_reg(pcie, data, H1_PCIEPHYDOUTR);
+ rcar_pci_write_reg(pcie, phyaddr, H1_PCIEPHYADRR);
/* Ignore errors as they will be dealt with if the data link is down */
phy_wait_for_ack(pcie);
/* Clear command */
- pci_write_reg(pcie, 0, H1_PCIEPHYDOUTR);
- pci_write_reg(pcie, 0, H1_PCIEPHYADRR);
+ rcar_pci_write_reg(pcie, 0, H1_PCIEPHYDOUTR);
+ rcar_pci_write_reg(pcie, 0, H1_PCIEPHYADRR);
/* Ignore errors as they will be dealt with if the data link is down */
phy_wait_for_ack(pcie);
@@ -457,7 +449,7 @@ static int rcar_pcie_wait_for_dl(struct rcar_pcie *pcie)
unsigned int timeout = 10;
while (timeout--) {
- if ((pci_read_reg(pcie, PCIETSTR) & DATA_LINK_ACTIVE))
+ if ((rcar_pci_read_reg(pcie, PCIETSTR) & DATA_LINK_ACTIVE))
return 0;
msleep(5);
@@ -471,17 +463,17 @@ static int rcar_pcie_hw_init(struct rcar_pcie *pcie)
int err;
/* Begin initialization */
- pci_write_reg(pcie, 0, PCIETCTLR);
+ rcar_pci_write_reg(pcie, 0, PCIETCTLR);
/* Set mode */
- pci_write_reg(pcie, 1, PCIEMSR);
+ rcar_pci_write_reg(pcie, 1, PCIEMSR);
/*
* Initial header for port config space is type 1, set the device
* class to match. Hardware takes care of propagating the IDSETR
* settings, so there is no need to bother with a quirk.
*/
- pci_write_reg(pcie, PCI_CLASS_BRIDGE_PCI << 16, IDSETR1);
+ rcar_pci_write_reg(pcie, PCI_CLASS_BRIDGE_PCI << 16, IDSETR1);
/*
* Setup Secondary Bus Number & Subordinate Bus Number, even though
@@ -491,33 +483,31 @@ static int rcar_pcie_hw_init(struct rcar_pcie *pcie)
rcar_rmw32(pcie, RCONF(PCI_SUBORDINATE_BUS), 0xff, 1);
/* Initialize default capabilities. */
- rcar_rmw32(pcie, REXPCAP(0), 0, PCI_CAP_ID_EXP);
+ rcar_rmw32(pcie, REXPCAP(0), 0xff, PCI_CAP_ID_EXP);
rcar_rmw32(pcie, REXPCAP(PCI_EXP_FLAGS),
PCI_EXP_FLAGS_TYPE, PCI_EXP_TYPE_ROOT_PORT << 4);
rcar_rmw32(pcie, RCONF(PCI_HEADER_TYPE), 0x7f,
PCI_HEADER_TYPE_BRIDGE);
/* Enable data link layer active state reporting */
- rcar_rmw32(pcie, REXPCAP(PCI_EXP_LNKCAP), 0, PCI_EXP_LNKCAP_DLLLARC);
+ rcar_rmw32(pcie, REXPCAP(PCI_EXP_LNKCAP), PCI_EXP_LNKCAP_DLLLARC,
+ PCI_EXP_LNKCAP_DLLLARC);
/* Write out the physical slot number = 0 */
rcar_rmw32(pcie, REXPCAP(PCI_EXP_SLTCAP), PCI_EXP_SLTCAP_PSN, 0);
/* Set the completion timer timeout to the maximum 50ms. */
- rcar_rmw32(pcie, TLCTLR+1, 0x3f, 50);
+ rcar_rmw32(pcie, TLCTLR + 1, 0x3f, 50);
/* Terminate list of capabilities (Next Capability Offset=0) */
- rcar_rmw32(pcie, RVCCAP(0), 0xfff0, 0);
-
- /* Enable MAC data scrambling. */
- rcar_rmw32(pcie, MACCTLR, SCRAMBLE_DISABLE, 0);
+ rcar_rmw32(pcie, RVCCAP(0), 0xfff00000, 0);
/* Enable MSI */
if (IS_ENABLED(CONFIG_PCI_MSI))
- pci_write_reg(pcie, 0x101f0000, PCIEMSITXR);
+ rcar_pci_write_reg(pcie, 0x101f0000, PCIEMSITXR);
/* Finish initialization - establish a PCI Express link */
- pci_write_reg(pcie, CFINIT, PCIETCTLR);
+ rcar_pci_write_reg(pcie, CFINIT, PCIETCTLR);
/* This will timeout if we don't have a link. */
err = rcar_pcie_wait_for_dl(pcie);
@@ -527,11 +517,6 @@ static int rcar_pcie_hw_init(struct rcar_pcie *pcie)
/* Enable INTx interrupts */
rcar_rmw32(pcie, PCIEINTXR, 0, 0xF << 8);
- /* Enable slave Bus Mastering */
- rcar_rmw32(pcie, RCONF(PCI_STATUS), PCI_STATUS_DEVSEL_MASK,
- PCI_COMMAND_IO | PCI_COMMAND_MEMORY | PCI_COMMAND_MASTER |
- PCI_STATUS_CAP_LIST | PCI_STATUS_DEVSEL_FAST);
-
wmb();
return 0;
@@ -560,7 +545,7 @@ static int rcar_pcie_hw_init_h1(struct rcar_pcie *pcie)
phy_write_reg(pcie, 0, 0x66, 0x1, 0x00008000);
while (timeout--) {
- if (pci_read_reg(pcie, H1_PCIEPHYSR))
+ if (rcar_pci_read_reg(pcie, H1_PCIEPHYSR))
return rcar_pcie_hw_init(pcie);
msleep(5);
@@ -599,7 +584,7 @@ static irqreturn_t rcar_pcie_msi_irq(int irq, void *data)
struct rcar_msi *msi = &pcie->msi;
unsigned long reg;
- reg = pci_read_reg(pcie, PCIEMSIFR);
+ reg = rcar_pci_read_reg(pcie, PCIEMSIFR);
/* MSI & INTx share an interrupt - we only handle MSI here */
if (!reg)
@@ -610,7 +595,7 @@ static irqreturn_t rcar_pcie_msi_irq(int irq, void *data)
unsigned int irq;
/* clear the interrupt */
- pci_write_reg(pcie, 1 << index, PCIEMSIFR);
+ rcar_pci_write_reg(pcie, 1 << index, PCIEMSIFR);
irq = irq_find_mapping(msi->domain, index);
if (irq) {
@@ -624,7 +609,7 @@ static irqreturn_t rcar_pcie_msi_irq(int irq, void *data)
}
/* see if there's any more pending in this vector */
- reg = pci_read_reg(pcie, PCIEMSIFR);
+ reg = rcar_pci_read_reg(pcie, PCIEMSIFR);
}
return IRQ_HANDLED;
@@ -651,8 +636,8 @@ static int rcar_msi_setup_irq(struct msi_chip *chip, struct pci_dev *pdev,
irq_set_msi_desc(irq, desc);
- msg.address_lo = pci_read_reg(pcie, PCIEMSIALR) & ~MSIFE;
- msg.address_hi = pci_read_reg(pcie, PCIEMSIAUR);
+ msg.address_lo = rcar_pci_read_reg(pcie, PCIEMSIALR) & ~MSIFE;
+ msg.address_hi = rcar_pci_read_reg(pcie, PCIEMSIAUR);
msg.data = hwirq;
write_msi_msg(irq, &msg);
@@ -729,11 +714,11 @@ static int rcar_pcie_enable_msi(struct rcar_pcie *pcie)
msi->pages = __get_free_pages(GFP_KERNEL, 0);
base = virt_to_phys((void *)msi->pages);
- pci_write_reg(pcie, base | MSIFE, PCIEMSIALR);
- pci_write_reg(pcie, 0, PCIEMSIAUR);
+ rcar_pci_write_reg(pcie, base | MSIFE, PCIEMSIALR);
+ rcar_pci_write_reg(pcie, 0, PCIEMSIAUR);
/* enable all MSI interrupts */
- pci_write_reg(pcie, 0xffffffff, PCIEMSIIER);
+ rcar_pci_write_reg(pcie, 0xffffffff, PCIEMSIIER);
return 0;
@@ -826,6 +811,7 @@ static int rcar_pcie_inbound_ranges(struct rcar_pcie *pcie,
if (cpu_addr > 0) {
unsigned long nr_zeros = __ffs64(cpu_addr);
u64 alignment = 1ULL << nr_zeros;
+
size = min(range->size, alignment);
} else {
size = range->size;
@@ -841,13 +827,13 @@ static int rcar_pcie_inbound_ranges(struct rcar_pcie *pcie,
* Set up 64-bit inbound regions as the range parser doesn't
* distinguish between 32 and 64-bit types.
*/
- pci_write_reg(pcie, lower_32_bits(pci_addr), PCIEPRAR(idx));
- pci_write_reg(pcie, lower_32_bits(cpu_addr), PCIELAR(idx));
- pci_write_reg(pcie, lower_32_bits(mask) | flags, PCIELAMR(idx));
+ rcar_pci_write_reg(pcie, lower_32_bits(pci_addr), PCIEPRAR(idx));
+ rcar_pci_write_reg(pcie, lower_32_bits(cpu_addr), PCIELAR(idx));
+ rcar_pci_write_reg(pcie, lower_32_bits(mask) | flags, PCIELAMR(idx));
- pci_write_reg(pcie, upper_32_bits(pci_addr), PCIEPRAR(idx+1));
- pci_write_reg(pcie, upper_32_bits(cpu_addr), PCIELAR(idx+1));
- pci_write_reg(pcie, 0, PCIELAMR(idx+1));
+ rcar_pci_write_reg(pcie, upper_32_bits(pci_addr), PCIEPRAR(idx+1));
+ rcar_pci_write_reg(pcie, upper_32_bits(cpu_addr), PCIELAR(idx+1));
+ rcar_pci_write_reg(pcie, 0, PCIELAMR(idx + 1));
pci_addr += size;
cpu_addr += size;
@@ -952,7 +938,7 @@ static int rcar_pcie_probe(struct platform_device *pdev)
of_pci_range_to_resource(&range, pdev->dev.of_node,
&pcie->res[win++]);
- if (win > PCI_MAX_RESOURCES)
+ if (win > RCAR_PCI_MAX_RESOURCES)
break;
}
@@ -982,7 +968,7 @@ static int rcar_pcie_probe(struct platform_device *pdev)
return 0;
}
- data = pci_read_reg(pcie, MACSR);
+ data = rcar_pci_read_reg(pcie, MACSR);
dev_info(&pdev->dev, "PCIe x%d: link up\n", (data >> 20) & 0x3f);
rcar_pcie_enable(pcie);
@@ -1003,4 +989,4 @@ module_platform_driver(rcar_pcie_driver);
MODULE_AUTHOR("Phil Edworthy <phil.edworthy@renesas.com>");
MODULE_DESCRIPTION("Renesas R-Car PCIe driver");
-MODULE_LICENSE("GPLv2");
+MODULE_LICENSE("GPL v2");
generated by cgit v1.2.3 (git 2.39.0) at 2024-11-06 11:50:14 +0300