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);
+}