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-rw-r--r--drivers/parisc/hppb.c105
1 files changed, 105 insertions, 0 deletions
diff --git a/drivers/parisc/hppb.c b/drivers/parisc/hppb.c
new file mode 100644
index 0000000000..0f9d80384e
--- /dev/null
+++ b/drivers/parisc/hppb.c
@@ -0,0 +1,105 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+** hppb.c:
+** HP-PB bus driver for the NOVA and K-Class systems.
+**
+** (c) Copyright 2002 Ryan Bradetich
+** (c) Copyright 2002 Hewlett-Packard Company
+**
+**
+*/
+
+#include <linux/types.h>
+#include <linux/init.h>
+#include <linux/mm.h>
+#include <linux/slab.h>
+#include <linux/dma-mapping.h>
+#include <linux/ioport.h>
+
+#include <asm/io.h>
+#include <asm/hardware.h>
+#include <asm/parisc-device.h>
+
+#include "iommu.h"
+
+struct hppb_card {
+ unsigned long hpa;
+ struct resource mmio_region;
+ struct hppb_card *next;
+};
+
+static struct hppb_card hppb_card_head = {
+ .hpa = 0,
+ .next = NULL,
+};
+
+#define IO_IO_LOW offsetof(struct bc_module, io_io_low)
+#define IO_IO_HIGH offsetof(struct bc_module, io_io_high)
+
+/**
+ * hppb_probe - Determine if the hppb driver should claim this device.
+ * @dev: The device which has been found
+ *
+ * Determine if hppb driver should claim this chip (return 0) or not
+ * (return 1). If so, initialize the chip and tell other partners in crime
+ * they have work to do.
+ */
+static int __init hppb_probe(struct parisc_device *dev)
+{
+ int status;
+ struct hppb_card *card = &hppb_card_head;
+
+ while(card->next) {
+ card = card->next;
+ }
+
+ if(card->hpa) {
+ card->next = kzalloc(sizeof(struct hppb_card), GFP_KERNEL);
+ if(!card->next) {
+ printk(KERN_ERR "HP-PB: Unable to allocate memory.\n");
+ return 1;
+ }
+ card = card->next;
+ }
+
+ card->hpa = dev->hpa.start;
+ card->mmio_region.name = "HP-PB Bus";
+ card->mmio_region.flags = IORESOURCE_MEM;
+
+ card->mmio_region.start = gsc_readl(dev->hpa.start + IO_IO_LOW);
+ card->mmio_region.end = gsc_readl(dev->hpa.start + IO_IO_HIGH) - 1;
+
+ status = ccio_request_resource(dev, &card->mmio_region);
+
+ pr_info("Found GeckoBoa at %pap, bus space %pR,%s claimed.\n",
+ &dev->hpa.start,
+ &card->mmio_region,
+ (status < 0) ? " not":"" );
+
+ return 0;
+}
+
+static const struct parisc_device_id hppb_tbl[] __initconst = {
+ { HPHW_BCPORT, HVERSION_REV_ANY_ID, 0x500, 0xc }, /* E25 and K */
+ { HPHW_BCPORT, 0x0, 0x501, 0xc }, /* E35 */
+ { HPHW_BCPORT, 0x0, 0x502, 0xc }, /* E45 */
+ { HPHW_BCPORT, 0x0, 0x503, 0xc }, /* E55 */
+ { 0, }
+};
+
+static struct parisc_driver hppb_driver __refdata = {
+ .name = "gecko_boa",
+ .id_table = hppb_tbl,
+ .probe = hppb_probe,
+};
+
+/**
+ * hppb_init - HP-PB bus initialization procedure.
+ *
+ * Register this driver.
+ */
+static int __init hppb_init(void)
+{
+ return register_parisc_driver(&hppb_driver);
+}
+arch_initcall(hppb_init);