#include "cns3xxx.h"
#include "core.h"
-enum cns3xxx_access_type {
- CNS3XXX_HOST_TYPE = 0,
- CNS3XXX_CFG0_TYPE,
- CNS3XXX_CFG1_TYPE,
- CNS3XXX_NUM_ACCESS_TYPES,
-};
-
struct cns3xxx_pcie {
- struct map_desc cfg_bases[CNS3XXX_NUM_ACCESS_TYPES];
+ void __iomem *host_regs; /* PCI config registers for host bridge */
+ void __iomem *cfg0_regs; /* PCI Type 0 config registers */
+ void __iomem *cfg1_regs; /* PCI Type 1 config registers */
unsigned int irqs[2];
struct resource res_io;
struct resource res_mem;
int busno = bus->number;
int slot = PCI_SLOT(devfn);
int offset;
- enum cns3xxx_access_type type;
void __iomem *base;
/* If there is no link, just show the CNS PCI bridge. */
* we still want to access it. For this to work, we must place
* the first device on the same bus as the CNS PCI bridge.
*/
- if (busno == 0) {
- if (slot > 1)
- return NULL;
- type = slot;
- } else {
- type = CNS3XXX_CFG1_TYPE;
- }
+ if (busno == 0) { /* directly connected PCIe bus */
+ switch (slot) {
+ case 0: /* host bridge device, function 0 only */
+ base = cnspci->host_regs;
+ break;
+ case 1: /* directly connected device */
+ base = cnspci->cfg0_regs;
+ break;
+ default:
+ return NULL; /* no such device */
+ }
+ } else /* remote PCI bus */
+ base = cnspci->cfg1_regs;
- base = (void __iomem *)cnspci->cfg_bases[type].virtual;
offset = ((busno & 0xf) << 20) | (devfn << 12) | (where & 0xffc);
-
return base + offset;
}
static struct cns3xxx_pcie cns3xxx_pcie[] = {
[0] = {
- .cfg_bases = {
- [CNS3XXX_HOST_TYPE] = {
- .virtual = CNS3XXX_PCIE0_HOST_BASE_VIRT,
- .pfn = __phys_to_pfn(CNS3XXX_PCIE0_HOST_BASE),
- .length = SZ_16M,
- .type = MT_DEVICE,
- },
- [CNS3XXX_CFG0_TYPE] = {
- .virtual = CNS3XXX_PCIE0_CFG0_BASE_VIRT,
- .pfn = __phys_to_pfn(CNS3XXX_PCIE0_CFG0_BASE),
- .length = SZ_16M,
- .type = MT_DEVICE,
- },
- [CNS3XXX_CFG1_TYPE] = {
- .virtual = CNS3XXX_PCIE0_CFG1_BASE_VIRT,
- .pfn = __phys_to_pfn(CNS3XXX_PCIE0_CFG1_BASE),
- .length = SZ_16M,
- .type = MT_DEVICE,
- },
- },
+ .host_regs = (void __iomem *)CNS3XXX_PCIE0_HOST_BASE_VIRT,
+ .cfg0_regs = (void __iomem *)CNS3XXX_PCIE0_CFG0_BASE_VIRT,
+ .cfg1_regs = (void __iomem *)CNS3XXX_PCIE0_CFG1_BASE_VIRT,
.res_io = {
.name = "PCIe0 I/O space",
.start = CNS3XXX_PCIE0_IO_BASE,
- .end = CNS3XXX_PCIE0_IO_BASE + SZ_16M - 1,
+ .end = CNS3XXX_PCIE0_CFG0_BASE - 1, /* 16 MiB */
.flags = IORESOURCE_IO,
},
.res_mem = {
.name = "PCIe0 non-prefetchable",
.start = CNS3XXX_PCIE0_MEM_BASE,
- .end = CNS3XXX_PCIE0_MEM_BASE + SZ_16M - 1,
+ .end = CNS3XXX_PCIE0_HOST_BASE - 1, /* 176 MiB */
.flags = IORESOURCE_MEM,
},
.irqs = { IRQ_CNS3XXX_PCIE0_RC, IRQ_CNS3XXX_PCIE0_DEVICE, },
},
},
[1] = {
- .cfg_bases = {
- [CNS3XXX_HOST_TYPE] = {
- .virtual = CNS3XXX_PCIE1_HOST_BASE_VIRT,
- .pfn = __phys_to_pfn(CNS3XXX_PCIE1_HOST_BASE),
- .length = SZ_16M,
- .type = MT_DEVICE,
- },
- [CNS3XXX_CFG0_TYPE] = {
- .virtual = CNS3XXX_PCIE1_CFG0_BASE_VIRT,
- .pfn = __phys_to_pfn(CNS3XXX_PCIE1_CFG0_BASE),
- .length = SZ_16M,
- .type = MT_DEVICE,
- },
- [CNS3XXX_CFG1_TYPE] = {
- .virtual = CNS3XXX_PCIE1_CFG1_BASE_VIRT,
- .pfn = __phys_to_pfn(CNS3XXX_PCIE1_CFG1_BASE),
- .length = SZ_16M,
- .type = MT_DEVICE,
- },
- },
+ .host_regs = (void __iomem *)CNS3XXX_PCIE1_HOST_BASE_VIRT,
+ .cfg0_regs = (void __iomem *)CNS3XXX_PCIE1_CFG0_BASE_VIRT,
+ .cfg1_regs = (void __iomem *)CNS3XXX_PCIE1_CFG1_BASE_VIRT,
.res_io = {
.name = "PCIe1 I/O space",
.start = CNS3XXX_PCIE1_IO_BASE,
- .end = CNS3XXX_PCIE1_IO_BASE + SZ_16M - 1,
+ .end = CNS3XXX_PCIE1_CFG0_BASE - 1, /* 16 MiB */
.flags = IORESOURCE_IO,
},
.res_mem = {
.name = "PCIe1 non-prefetchable",
.start = CNS3XXX_PCIE1_MEM_BASE,
- .end = CNS3XXX_PCIE1_MEM_BASE + SZ_16M - 1,
+ .end = CNS3XXX_PCIE1_HOST_BASE - 1, /* 176 MiB */
.flags = IORESOURCE_MEM,
},
.irqs = { IRQ_CNS3XXX_PCIE1_RC, IRQ_CNS3XXX_PCIE1_DEVICE, },
.ops = &cns3xxx_pcie_ops,
.sysdata = &sd,
};
- u32 io_base = cnspci->res_io.start >> 16;
- u32 mem_base = cnspci->res_mem.start >> 16;
- u32 host_base = cnspci->cfg_bases[CNS3XXX_HOST_TYPE].pfn;
- u32 cfg0_base = cnspci->cfg_bases[CNS3XXX_CFG0_TYPE].pfn;
+ u16 mem_base = cnspci->res_mem.start >> 16;
+ u16 mem_limit = cnspci->res_mem.end >> 16;
+ u16 io_base = cnspci->res_io.start >> 16;
+ u16 io_limit = cnspci->res_io.end >> 16;
u32 devfn = 0;
u8 tmp8;
u16 pos;
u16 dc;
- host_base = (__pfn_to_phys(host_base) - 1) >> 16;
- cfg0_base = (__pfn_to_phys(cfg0_base) - 1) >> 16;
-
pci_bus_write_config_byte(&bus, devfn, PCI_PRIMARY_BUS, 0);
pci_bus_write_config_byte(&bus, devfn, PCI_SECONDARY_BUS, 1);
pci_bus_write_config_byte(&bus, devfn, PCI_SUBORDINATE_BUS, 1);
pci_bus_read_config_byte(&bus, devfn, PCI_SUBORDINATE_BUS, &tmp8);
pci_bus_write_config_word(&bus, devfn, PCI_MEMORY_BASE, mem_base);
- pci_bus_write_config_word(&bus, devfn, PCI_MEMORY_LIMIT, host_base);
+ pci_bus_write_config_word(&bus, devfn, PCI_MEMORY_LIMIT, mem_limit);
pci_bus_write_config_word(&bus, devfn, PCI_IO_BASE_UPPER16, io_base);
- pci_bus_write_config_word(&bus, devfn, PCI_IO_LIMIT_UPPER16, cfg0_base);
+ pci_bus_write_config_word(&bus, devfn, PCI_IO_LIMIT_UPPER16, io_limit);
if (!cnspci->linked)
return;
"imprecise external abort");
for (i = 0; i < ARRAY_SIZE(cns3xxx_pcie); i++) {
- iotable_init(cns3xxx_pcie[i].cfg_bases,
- ARRAY_SIZE(cns3xxx_pcie[i].cfg_bases));
cns3xxx_pwr_clk_en(0x1 << PM_CLK_GATE_REG_OFFSET_PCIE(i));
cns3xxx_pwr_soft_rst(0x1 << PM_SOFT_RST_REG_OFFST_PCIE(i));
cns3xxx_pcie_check_link(&cns3xxx_pcie[i]);
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