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authorMax Filippov <jcmvbkbc@gmail.com>2018-10-15 12:33:51 -0700
committerMax Filippov <jcmvbkbc@gmail.com>2019-06-16 23:31:28 -0700
commit88804e680bac74114cecd2e565eef9a678daacd0 (patch)
tree274d6abe50bae28b8267ea4a5207ccf5b7d05a33 /arch/xtensa/kernel
parent2a97d60cf6a53123f5a0f066b7b219410eccd0dc (diff)
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xtensa: drop dead PCI support code
xtensa-specific PCI initialization code has significantly bitrotted over time because there's no platform that use it. Get rid of remaining non-functioning initialization and remove platform_pcibios_* interface. A new platform that would use PCI on xtensa will configure PCI controller using device tree. Drop variables pci_ctrl_head, pci_bus_count and functions pcibios_init, pci_controller_apertures, platform_pcibios_init and platform_pcibios_fixup. Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
Diffstat (limited to 'arch/xtensa/kernel')
-rw-r--r--arch/xtensa/kernel/pci.c91
-rw-r--r--arch/xtensa/kernel/platform.c2
-rw-r--r--arch/xtensa/kernel/setup.c4
3 files changed, 0 insertions, 97 deletions
diff --git a/arch/xtensa/kernel/pci.c b/arch/xtensa/kernel/pci.c
index e0235e34e1ba..14effa40eb7d 100644
--- a/arch/xtensa/kernel/pci.c
+++ b/arch/xtensa/kernel/pci.c
@@ -24,22 +24,6 @@
#include <asm/pci-bridge.h>
#include <asm/platform.h>
-/* PCI Controller */
-
-
-/*
- * pcibios_alloc_controller
- * pcibios_enable_device
- * pcibios_fixups
- * pcibios_align_resource
- * pcibios_fixup_bus
- * pci_bus_add_device
- */
-
-static struct pci_controller *pci_ctrl_head;
-
-static int pci_bus_count;
-
/*
* We need to avoid collisions with `mirrored' VGA ports
* and other strange ISA hardware, so we always want the
@@ -74,81 +58,6 @@ pcibios_align_resource(void *data, const struct resource *res,
return start;
}
-static void __init pci_controller_apertures(struct pci_controller *pci_ctrl,
- struct list_head *resources)
-{
- struct resource *res;
- unsigned long io_offset;
- int i;
-
- io_offset = (unsigned long)pci_ctrl->io_space.base;
- res = &pci_ctrl->io_resource;
- if (!res->flags) {
- if (io_offset)
- pr_err("I/O resource not set for host bridge %d\n",
- pci_ctrl->index);
- res->start = 0;
- res->end = IO_SPACE_LIMIT;
- res->flags = IORESOURCE_IO;
- }
- res->start += io_offset;
- res->end += io_offset;
- pci_add_resource_offset(resources, res, io_offset);
-
- for (i = 0; i < 3; i++) {
- res = &pci_ctrl->mem_resources[i];
- if (!res->flags) {
- if (i > 0)
- continue;
- pr_err("Memory resource not set for host bridge %d\n",
- pci_ctrl->index);
- res->start = 0;
- res->end = ~0U;
- res->flags = IORESOURCE_MEM;
- }
- pci_add_resource(resources, res);
- }
-}
-
-static int __init pcibios_init(void)
-{
- struct pci_controller *pci_ctrl;
- struct list_head resources;
- struct pci_bus *bus;
- int next_busno = 0, ret;
-
- pr_info("PCI: Probing PCI hardware\n");
-
- /* Scan all of the recorded PCI controllers. */
- for (pci_ctrl = pci_ctrl_head; pci_ctrl; pci_ctrl = pci_ctrl->next) {
- pci_ctrl->last_busno = 0xff;
- INIT_LIST_HEAD(&resources);
- pci_controller_apertures(pci_ctrl, &resources);
- bus = pci_scan_root_bus(NULL, pci_ctrl->first_busno,
- pci_ctrl->ops, pci_ctrl, &resources);
- if (!bus)
- continue;
-
- pci_ctrl->bus = bus;
- pci_ctrl->last_busno = bus->busn_res.end;
- if (next_busno <= pci_ctrl->last_busno)
- next_busno = pci_ctrl->last_busno+1;
- }
- pci_bus_count = next_busno;
- ret = platform_pcibios_fixup();
- if (ret)
- return ret;
-
- for (pci_ctrl = pci_ctrl_head; pci_ctrl; pci_ctrl = pci_ctrl->next) {
- if (pci_ctrl->bus)
- pci_bus_add_devices(pci_ctrl->bus);
- }
-
- return 0;
-}
-
-subsys_initcall(pcibios_init);
-
void pcibios_fixup_bus(struct pci_bus *bus)
{
if (bus->parent) {
diff --git a/arch/xtensa/kernel/platform.c b/arch/xtensa/kernel/platform.c
index 1cf008284dd2..a95ba05b0abe 100644
--- a/arch/xtensa/kernel/platform.c
+++ b/arch/xtensa/kernel/platform.c
@@ -34,8 +34,6 @@ _F(void, halt, (void), { while(1); });
_F(void, power_off, (void), { while(1); });
_F(void, idle, (void), { __asm__ __volatile__ ("waiti 0" ::: "memory"); });
_F(void, heartbeat, (void), { });
-_F(int, pcibios_fixup, (void), { return 0; });
-_F(void, pcibios_init, (void), { });
#ifdef CONFIG_XTENSA_CALIBRATE_CCOUNT
_F(void, calibrate_ccount, (void),
diff --git a/arch/xtensa/kernel/setup.c b/arch/xtensa/kernel/setup.c
index 176cb46bcf12..5cb8a62e091c 100644
--- a/arch/xtensa/kernel/setup.c
+++ b/arch/xtensa/kernel/setup.c
@@ -405,10 +405,6 @@ void __init setup_arch(char **cmdline_p)
conswitchp = &dummy_con;
# endif
#endif
-
-#ifdef CONFIG_PCI
- platform_pcibios_init();
-#endif
}
static DEFINE_PER_CPU(struct cpu, cpu_data);