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path: root/drivers/pci/pci_msc01.c
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Diffstat (limited to 'drivers/pci/pci_msc01.c')
-rw-r--r--drivers/pci/pci_msc01.c125
1 files changed, 125 insertions, 0 deletions
diff --git a/drivers/pci/pci_msc01.c b/drivers/pci/pci_msc01.c
new file mode 100644
index 0000000..284ffa0
--- /dev/null
+++ b/drivers/pci/pci_msc01.c
@@ -0,0 +1,125 @@
+/*
+ * Copyright (C) 2013 Imagination Technologies
+ * Author: Paul Burton <paul.burton@imgtec.com>
+ *
+ * SPDX-License-Identifier: GPL-2.0+
+ */
+
+#include <common.h>
+#include <msc01.h>
+#include <pci.h>
+#include <pci_msc01.h>
+#include <asm/io.h>
+
+#define PCI_ACCESS_READ 0
+#define PCI_ACCESS_WRITE 1
+
+struct msc01_pci_controller {
+ struct pci_controller hose;
+ void *base;
+};
+
+static inline struct msc01_pci_controller *
+hose_to_msc01(struct pci_controller *hose)
+{
+ return container_of(hose, struct msc01_pci_controller, hose);
+}
+
+static int msc01_config_access(struct msc01_pci_controller *msc01,
+ unsigned char access_type, pci_dev_t bdf,
+ int where, u32 *data)
+{
+ const u32 aborts = MSC01_PCI_INTSTAT_MA_MSK | MSC01_PCI_INTSTAT_TA_MSK;
+ void *intstat = msc01->base + MSC01_PCI_INTSTAT_OFS;
+ void *cfgdata = msc01->base + MSC01_PCI_CFGDATA_OFS;
+ unsigned int bus = PCI_BUS(bdf);
+ unsigned int dev = PCI_DEV(bdf);
+ unsigned int devfn = PCI_DEV(bdf) << 3 | PCI_FUNC(bdf);
+
+ /* clear abort status */
+ __raw_writel(aborts, intstat);
+
+ /* setup address */
+ __raw_writel((bus << MSC01_PCI_CFGADDR_BNUM_SHF) |
+ (dev << MSC01_PCI_CFGADDR_DNUM_SHF) |
+ (devfn << MSC01_PCI_CFGADDR_FNUM_SHF) |
+ ((where / 4) << MSC01_PCI_CFGADDR_RNUM_SHF),
+ msc01->base + MSC01_PCI_CFGADDR_OFS);
+
+ /* perform access */
+ if (access_type == PCI_ACCESS_WRITE)
+ __raw_writel(*data, cfgdata);
+ else
+ *data = __raw_readl(cfgdata);
+
+ /* check for aborts */
+ if (__raw_readl(intstat) & aborts) {
+ /* clear abort status */
+ __raw_writel(aborts, intstat);
+ return -1;
+ }
+
+ return 0;
+}
+
+static int msc01_read_config_dword(struct pci_controller *hose, pci_dev_t dev,
+ int where, u32 *value)
+{
+ struct msc01_pci_controller *msc01 = hose_to_msc01(hose);
+
+ *value = 0xffffffff;
+ return msc01_config_access(msc01, PCI_ACCESS_READ, dev, where, value);
+}
+
+static int msc01_write_config_dword(struct pci_controller *hose, pci_dev_t dev,
+ int where, u32 value)
+{
+ struct msc01_pci_controller *gt = hose_to_msc01(hose);
+ u32 data = value;
+
+ return msc01_config_access(gt, PCI_ACCESS_WRITE, dev, where, &data);
+}
+
+void msc01_pci_init(void *base, unsigned long sys_bus, unsigned long sys_phys,
+ unsigned long sys_size, unsigned long mem_bus,
+ unsigned long mem_phys, unsigned long mem_size,
+ unsigned long io_bus, unsigned long io_phys,
+ unsigned long io_size)
+{
+ static struct msc01_pci_controller global_msc01;
+ struct msc01_pci_controller *msc01;
+ struct pci_controller *hose;
+
+ msc01 = &global_msc01;
+ msc01->base = base;
+
+ hose = &msc01->hose;
+
+ hose->first_busno = 0;
+ hose->last_busno = 0;
+
+ /* System memory space */
+ pci_set_region(&hose->regions[0], sys_bus, sys_phys, sys_size,
+ PCI_REGION_MEM | PCI_REGION_SYS_MEMORY);
+
+ /* PCI memory space */
+ pci_set_region(&hose->regions[1], mem_bus, mem_phys, mem_size,
+ PCI_REGION_MEM);
+
+ /* PCI I/O space */
+ pci_set_region(&hose->regions[2], io_bus, io_phys, io_size,
+ PCI_REGION_IO);
+
+ hose->region_count = 3;
+
+ pci_set_ops(hose,
+ pci_hose_read_config_byte_via_dword,
+ pci_hose_read_config_word_via_dword,
+ msc01_read_config_dword,
+ pci_hose_write_config_byte_via_dword,
+ pci_hose_write_config_word_via_dword,
+ msc01_write_config_dword);
+
+ pci_register_hose(hose);
+ hose->last_busno = pci_hose_scan(hose);
+}