431 lines
10 KiB
C
431 lines
10 KiB
C
/*
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* Copyright (c) 2011 Aeroflex Gaisler
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*
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* BSD license:
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*/
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#include <asm-leon/amba.h>
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#undef AMBA_TYPE_AHBIO_ADDR
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#include <asm-leon/lambapp.h>
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#include <string.h>
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#define AMBA_CONF_AREA 0xff000
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#define AMBA_AHB_SLAVE_CONF_AREA (1 << 11)
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#define AMBA_APB_SLAVES 16
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#ifdef PDEBUG
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#define DPRINTF(p) printf p
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#else
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#define DPRINTF(p)
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#endif
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unsigned int
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ambapp_addr_from (struct ambapp_mmap *mmaps, unsigned int address)
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{
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/* no translation? */
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if (!mmaps)
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return address;
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while (mmaps->size)
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{
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if ((address >= mmaps->remote_adr)
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&& (address <= (mmaps->remote_adr + (mmaps->size - 1))))
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{
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return (address - mmaps->remote_adr) + mmaps->local_adr;
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}
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mmaps++;
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}
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return 1;
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}
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static void
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ambapp_ahb_dev_init (unsigned int ioarea,
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struct ambapp_mmap *mmaps,
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struct ambapp_pnp_ahb *ahb, struct ambapp_dev_hdr *dev)
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{
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int bar;
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struct ambapp_ahb_info *ahb_info;
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unsigned int addr, mask, mbar;
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/* Setup device struct */
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dev->vendor = ambapp_pnp_vendor (ahb->id);
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dev->device = ambapp_pnp_device (ahb->id);
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ahb_info = dev->devinfo;
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ahb_info->ver = ambapp_pnp_ver (ahb->id);
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ahb_info->irq = ambapp_pnp_irq (ahb->id);
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ahb_info->custom[0] = (unsigned int) ahb->custom[0];
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ahb_info->custom[1] = (unsigned int) ahb->custom[1];
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ahb_info->custom[2] = (unsigned int) ahb->custom[2];
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DPRINTF (("+AHB device %d:%d\n", dev->device, dev->vendor));
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/* Memory BARs */
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for (bar = 0; bar < 4; bar++)
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{
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mbar = ahb->mbar[bar];
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if (mbar == 0)
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{
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addr = 0;
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mask = 0;
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}
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else
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{
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addr = ambapp_pnp_start (mbar);
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if (ambapp_pnp_mbar_type (mbar) == AMBA_TYPE_AHBIO)
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{
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/* AHB I/O area is releative IO_AREA */
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addr = AMBA_TYPE_AHBIO_ADDR (addr, ioarea);
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mask =
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(((unsigned int) (ambapp_pnp_mbar_mask ((~mbar)) << 8) |
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0xff)) + 1;
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}
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else
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{
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/* AHB memory area, absolute address */
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addr = ambapp_addr_from (mmaps, addr);
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mask =
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(~((unsigned int) (ambapp_pnp_mbar_mask (mbar) << 20))) + 1;
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}
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}
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ahb_info->start[bar] = addr;
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ahb_info->mask[bar] = mask;
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}
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}
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static void
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ambapp_apb_dev_init (unsigned int base,
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struct ambapp_mmap *mmaps,
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struct ambapp_pnp_apb *apb, struct ambapp_dev_hdr *dev)
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{
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struct ambapp_apb_info *apb_info;
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/* Setup device struct */
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dev->vendor = ambapp_pnp_vendor (apb->id);
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dev->device = ambapp_pnp_device (apb->id);
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apb_info = dev->devinfo;
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apb_info->ver = ambapp_pnp_ver (apb->id);
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apb_info->irq = ambapp_pnp_irq (apb->id);
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apb_info->start = ambapp_pnp_apb_start (apb->iobar, base);
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apb_info->mask = ambapp_pnp_apb_mask (apb->iobar);
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DPRINTF (("+APB device %d:%d\n", dev->device, dev->vendor));
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}
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#define MAX_NUM_BUSES 16
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static void
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ambapp_add_scanned_bus (unsigned int *ioareas, unsigned int ioarea)
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{
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int i;
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for (i = 0; i < MAX_NUM_BUSES; i++)
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{
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if (ioareas[i] == 0)
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{
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ioareas[i] = ioarea;
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return;
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}
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}
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}
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static int
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ambapp_has_been_scanned (unsigned int *ioareas, unsigned int ioarea)
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{
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int i;
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if (!ioareas)
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return 0;
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for (i = 0; i < MAX_NUM_BUSES; i++)
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{
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if (ioareas[i] == 0)
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{
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break;
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}
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else if (ioareas[i] == ioarea)
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{
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return 1;
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}
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}
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return 0;
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}
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static int
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ambapp_find (unsigned int ioarea,
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struct ambapp_dev_hdr *parent,
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struct ambapp_mmap *mmaps,
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void *internal,
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int (*find_match) (struct ambapp_dev_hdr * dev, void *arg),
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void *arg, int vendor, int device)
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{
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struct ambapp_pnp_ahb *ahb, ahb_buf;
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struct ambapp_pnp_apb *apb, apb_buf;
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struct ambapp_dev_hdr *dev, *prev, *prevapb, *apbdev;
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struct ambapp_ahb_info *ahb_info;
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int maxloops = 64;
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unsigned int apbbase, bridge_address;
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int i, j;
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DPRINTF (("Scan at 0x%08x\n", ioarea));
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if (parent)
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{
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/* scan first bus for 64 devices, rest for 16 devices */
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maxloops = 16;
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}
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else
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{
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if (internal)
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{
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ambapp_add_scanned_bus (internal, ioarea);
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}
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}
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prev = parent;
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/* AHB MASTERS */
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ahb = (struct ambapp_pnp_ahb *) (ioarea | AMBA_CONF_AREA);
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for (i = 0; i < maxloops; i++)
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{
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memcpy (&ahb_buf, ahb, sizeof (struct ambapp_pnp_ahb));
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if (ahb_buf.id != 0)
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{
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struct ambapp_dev_hdr _dev;
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struct ambapp_ahb_info _ahb;
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memset (&_dev, 0, sizeof (_dev));
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memset (&_ahb, 0, sizeof (_ahb));
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_dev.devinfo = &_ahb;
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_dev.dev_type = DEV_AHB_MST;
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dev = &_dev;
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ambapp_ahb_dev_init (ioarea, mmaps, &ahb_buf, dev);
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DPRINTF ((" = test %d:%d == %d:%d\n", vendor, device, dev->vendor,
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dev->device));
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if (vendor == dev->vendor &&
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device == dev->device && find_match (dev, arg))
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{
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return 1;
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}
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}
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ahb++;
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}
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/* AHB SLAVES */
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ahb =
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(struct ambapp_pnp_ahb *) (ioarea | AMBA_CONF_AREA |
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AMBA_AHB_SLAVE_CONF_AREA);
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for (i = 0; i < maxloops; i++)
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{
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memcpy (&ahb_buf, ahb, sizeof (struct ambapp_pnp_ahb));
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if (ahb_buf.id != 0)
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{
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struct ambapp_dev_hdr _dev;
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struct ambapp_ahb_info _ahb;
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memset (&_dev, 0, sizeof (_dev));
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memset (&_ahb, 0, sizeof (_ahb));
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_dev.devinfo = &_ahb;
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_dev.dev_type = DEV_AHB_MST;
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dev = &_dev;
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ambapp_ahb_dev_init (ioarea, mmaps, &ahb_buf, dev);
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DPRINTF ((" = test %d:%d == %d:%d\n", vendor, device, dev->vendor,
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dev->device));
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if (vendor == dev->vendor &&
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device == dev->device && find_match (dev, arg))
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{
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return 1;
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}
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/* Is it a AHB/AHB Bridge ? */
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if ((dev->device == GAISLER_AHB2AHB)
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&& (dev->vendor == VENDOR_GAISLER))
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{
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/* AHB/AHB Bridge Found, recurse down the Bridge */
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ahb_info = dev->devinfo;
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if (ahb_info->ver)
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{
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bridge_address =
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ambapp_addr_from (mmaps, ahb_info->custom[1]);
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DPRINTF (("+(AHBAHB:0x%x)\n", bridge_address));
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/* Makes sure bus only scanned once */
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if (internal == 0
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|| ambapp_has_been_scanned (internal,
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bridge_address) == NULL)
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{
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if (internal)
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ambapp_add_scanned_bus (internal, bridge_address);
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if (ambapp_find (bridge_address, dev, mmaps, internal,
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find_match, arg, vendor, device))
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return 1;
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}
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}
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}
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else if ((dev->device == GAISLER_APBMST)
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&& (dev->vendor == VENDOR_GAISLER))
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{
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/* AHB/APB Bridge Found, add the APB devices to this AHB Slave's children */
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prevapb = dev;
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ahb_info = dev->devinfo;
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apbbase = ahb_info->start[0];
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apb = (struct ambapp_pnp_apb *) (apbbase | AMBA_CONF_AREA);
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for (j = 0; j < AMBA_APB_SLAVES; j++)
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{
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memcpy (&apb_buf, apb, sizeof (struct ambapp_pnp_apb));
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if (apb_buf.id)
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{
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struct ambapp_dev_hdr _apbdev;
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struct ambapp_apb_info _apb;
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memset (&_apbdev, 0, sizeof (_apbdev));
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memset (&_apb, 0, sizeof (_apb));
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_apbdev.devinfo = &_apb;
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_apbdev.dev_type = DEV_APB_SLV;
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apbdev = &_apbdev;
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ambapp_apb_dev_init (apbbase, mmaps, &apb_buf, apbdev);
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DPRINTF ((" = test %d:%d == %d:%d\n", vendor, device,
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apbdev->vendor, apbdev->device));
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if (vendor == apbdev->vendor &&
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device == apbdev->device &&
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find_match (apbdev, arg))
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{
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return 1;
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}
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}
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apb++;
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}
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}
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}
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ahb++;
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}
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if (parent == NULL)
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{
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/*free(internal); */
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}
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return 0;
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}
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struct ambapp_dev_find_match_arg
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{
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int index;
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int count;
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int type;
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void *dev;
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};
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/* AMBA PP find routines */
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static int
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ambapp_dev_find_match (struct ambapp_dev_hdr *dev, void *arg)
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{
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struct ambapp_dev_find_match_arg *p = arg;
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if (p->index == 0)
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{
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/* Found controller, stop */
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if (p->type == DEV_APB_SLV)
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{
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*(struct ambapp_apb_info *) p->dev =
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*(struct ambapp_apb_info *) dev->devinfo;
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p->dev = ((struct ambapp_apb_info *) p->dev) + 1;
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}
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else
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{
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*(struct ambapp_ahb_info *) p->dev =
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*(struct ambapp_ahb_info *) dev->devinfo;
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p->dev = ((struct ambapp_ahb_info *) p->dev) + 1;
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}
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p->count--;
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if (p->count < 1)
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return 1;
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}
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else
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{
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p->index--;
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}
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return 0;
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}
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static int
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find_apbslvs_next (int vendor, int device, struct ambapp_apb_info *dev,
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int index, int maxno)
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{
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struct ambapp_dev_find_match_arg arg;
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unsigned int busses[MAX_NUM_BUSES];
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memset (busses, 0, sizeof (busses));
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arg.index = index;
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arg.count = maxno;
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arg.type = DEV_APB_SLV; /* APB */
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arg.dev = dev;
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ambapp_find (LEON3_IO_AREA, NULL, NULL, &busses,
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ambapp_dev_find_match, &arg, vendor, device);
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return maxno - arg.count;
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}
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int
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find_apbslv (int vendor, int device, struct ambapp_apb_info *dev)
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{
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return find_apbslvs_next (vendor, device, dev, 0, 1);
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}
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struct ambapp_dev_hdr *ambapp_root = NULL;
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unsigned int busses[MAX_NUM_BUSES];
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extern unsigned int console;
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extern unsigned int rtc;
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extern unsigned int irqmp;
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void
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pnpinit (void)
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{
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struct ambapp_apb_info dev;
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int n;
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if ((n = find_apbslv (VENDOR_GAISLER, GAISLER_APBUART, &dev)) == 1)
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{
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console = dev.start;
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DPRINTF (("Found abuart at 0x%x\n", console));
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}
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if ((n = find_apbslv (VENDOR_GAISLER, GAISLER_GPTIMER, &dev)) == 1)
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{
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rtc = dev.start + 0x10;
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DPRINTF (("Found rtc at 0x%x\n", rtc));
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}
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if ((n = find_apbslv (VENDOR_GAISLER, GAISLER_IRQMP, &dev)) == 1)
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{
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irqmp = dev.start;
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DPRINTF (("Found irqmp at 0x%x\n", rtc));
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}
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}
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