Add the rt linux 4.1.3-rt3 as base

[kvmfornfv.git] / kernel / drivers / parisc / hppb.c

diff --git a/kernel/drivers/parisc/hppb.c b/kernel/drivers/parisc/hppb.c
new file mode 100644 (file)
index 0000000..898208e
--- /dev/null
+++ b/kernel/drivers/parisc/hppb.c
@@ -0,0 +1,106 @@
+/*
+** hppb.c:
+**      HP-PB bus driver for the NOVA and K-Class systems.
+**
+**      (c) Copyright 2002 Ryan Bradetich
+**      (c) Copyright 2002 Hewlett-Packard Company
+**
+** This program is free software; you can redistribute it and/or modify
+** it under the terms of the GNU General Public License as published by
+** the Free Software Foundation; either version 2 of the License, or
+** (at your option) any later version.
+**
+*/
+
+#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>
+
+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 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;
+       }
+       printk(KERN_INFO "Found GeckoBoa at 0x%llx\n",
+                       (unsigned long long) dev->hpa.start);
+
+       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);
+       if(status < 0) {
+               printk(KERN_ERR "%s: failed to claim HP-PB bus space (%pR)\n",
+                       __FILE__, &card->mmio_region);
+       }
+
+        return 0;
+}
+
+static struct parisc_device_id hppb_tbl[] = {
+        { 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 = {
+        .name =         "gecko_boa",
+        .id_table =     hppb_tbl,
+       .probe =        hppb_probe,
+};
+
+/**
+ * hppb_init - HP-PB bus initialization procedure.
+ *
+ * Register this driver.   
+ */
+void __init hppb_init(void)
+{
+        register_parisc_driver(&hppb_driver);
+}