The Design and Implementation of the FreeBSD Operating System, Second Edition
Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)


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FreeBSD/Linux Kernel Cross Reference
sys/mips/atheros/ar71xx_caldata.c

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    1 /*-
    2  * Copyright (c) 2017, Adrian Chadd <adrian@FreeBSD.org>.
    3  * All rights reserved.
    4  *
    5  * Redistribution and use in source and binary forms, with or without
    6  * modification, are permitted provided that the following conditions
    7  * are met:
    8  * 1. Redistributions of source code must retain the above copyright
    9  *    notice unmodified, this list of conditions, and the following
   10  *    disclaimer.
   11  * 2. Redistributions in binary form must reproduce the above copyright
   12  *    notice, this list of conditions and the following disclaimer in the
   13  *    documentation and/or other materials provided with the distribution.
   14  *
   15  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
   16  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   17  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   18  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
   19  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   20  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   21  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   22  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   23  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   24  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   25  * SUCH DAMAGE.
   26  */
   27 
   28 #include <sys/cdefs.h>
   29 __FBSDID("$FreeBSD: stable/12/sys/mips/atheros/ar71xx_caldata.c 318696 2017-05-23 06:20:06Z adrian $");
   30 
   31 #include "opt_ar71xx.h"
   32 
   33 #include <sys/param.h>
   34 #include <sys/systm.h>
   35 
   36 #include <sys/bus.h>
   37 #include <sys/interrupt.h>
   38 #include <sys/malloc.h>
   39 #include <sys/kernel.h>
   40 #include <sys/module.h>
   41 #include <sys/rman.h>
   42 #include <sys/lock.h>
   43 
   44 #include <vm/vm.h>
   45 #include <vm/pmap.h>
   46 #include <vm/vm_extern.h>
   47 
   48 #include <machine/bus.h>
   49 #include <machine/cpu.h>
   50 #include <machine/intr_machdep.h>
   51 
   52 #include <sys/linker.h>
   53 #include <sys/firmware.h>
   54 
   55 struct ar71xx_caldata_softc {
   56         device_t                sc_dev;
   57 };
   58 
   59 static int
   60 ar71xx_caldata_probe(device_t dev)
   61 {
   62 
   63         return (BUS_PROBE_NOWILDCARD);
   64 }
   65 
   66 /* XXX TODO: unify with what's in ar71xx_fixup.c */
   67 
   68 /*
   69  * Create a calibration block from memory mapped SPI data for use by
   70  * various drivers.  Right now it's just ath(4) but later board support
   71  * will include 802.11ac NICs with calibration data in NOR flash.
   72  *
   73  * (Yes, there are a handful of QCA MIPS boards with QCA9880v2 802.11ac chips
   74  * with calibration data in flash..)
   75  */
   76 static void
   77 ar71xx_platform_create_cal_data(device_t dev, int id, long int flash_addr,
   78     int size)
   79 {
   80         char buf[64];
   81         uint16_t *cal_data = (uint16_t *) MIPS_PHYS_TO_KSEG1(flash_addr);
   82         void *eeprom = NULL;
   83         const struct firmware *fw = NULL;
   84 
   85         device_printf(dev, "EEPROM firmware: 0x%lx @ %d bytes\n",
   86             flash_addr, size);
   87 
   88         eeprom = malloc(size, M_DEVBUF, M_WAITOK | M_ZERO);
   89         if (! eeprom) {
   90                 device_printf(dev, "%s: malloc failed for '%s', aborting EEPROM\n",
   91                 __func__, buf);
   92                 return;
   93         }
   94 
   95         memcpy(eeprom, cal_data, size);
   96 
   97         /*
   98          * Generate a flash EEPROM 'firmware' from the given memory
   99          * region.  Since the SPI controller will eventually
  100          * go into port-IO mode instead of memory-mapped IO
  101          * mode, a copy of the EEPROM contents is required.
  102          */
  103 
  104         snprintf(buf, sizeof(buf), "%s.%d.map.%d.eeprom_firmware",
  105             device_get_name(dev),
  106             device_get_unit(dev),
  107             id);
  108 
  109         fw = firmware_register(buf, eeprom, size, 1, NULL);
  110         if (fw == NULL) {
  111                 device_printf(dev, "%s: firmware_register (%s) failed\n",
  112                     __func__, buf);
  113                 free(eeprom, M_DEVBUF);
  114                 return;
  115         }
  116         device_printf(dev, "device EEPROM '%s' registered\n", buf);
  117 }
  118 
  119 /*
  120  * Iterate through a list of early-boot hints creating calibration
  121  * data firmware chunks for AHB (ie, non-PCI) devices with calibration
  122  * data.
  123  */
  124 static int
  125 ar71xx_platform_check_eeprom_hints(device_t dev)
  126 {
  127         char buf[64];
  128         long int addr;
  129         int size;
  130         int i;
  131 
  132         for (i = 0; i < 8; i++) {
  133                 snprintf(buf, sizeof(buf), "map.%d.ath_fixup_addr", i);
  134                 if (resource_long_value(device_get_name(dev),
  135                     device_get_unit(dev), buf, &addr) != 0)
  136                         break;
  137                 snprintf(buf, sizeof(buf), "map.%d.ath_fixup_size", i);
  138                 if (resource_int_value(device_get_name(dev),
  139                     device_get_unit(dev), buf, &size) != 0)
  140                         break;
  141                 device_printf(dev, "map.%d.ath_fixup_addr=0x%08x; size=%d\n",
  142                     i, (int) addr, size);
  143                 (void) ar71xx_platform_create_cal_data(dev, i, addr, size);
  144         }
  145 
  146         return (0);
  147 }
  148 
  149 static int
  150 ar71xx_caldata_attach(device_t dev)
  151 {
  152 
  153         device_add_child(dev, "nexus", -1);
  154         ar71xx_platform_check_eeprom_hints(dev);
  155         return (bus_generic_attach(dev));
  156 }
  157 
  158 static device_method_t ar71xx_caldata_methods[] = {
  159         /* Device interface */
  160         DEVMETHOD(device_probe,         ar71xx_caldata_probe),
  161         DEVMETHOD(device_attach,        ar71xx_caldata_attach),
  162         DEVMETHOD(device_shutdown,      bus_generic_shutdown),
  163         DEVMETHOD(device_suspend,       bus_generic_suspend),
  164         DEVMETHOD(device_resume,        bus_generic_resume),
  165         DEVMETHOD_END
  166 };
  167 
  168 static driver_t ar71xx_caldata_driver = {
  169         "ar71xx_caldata",
  170         ar71xx_caldata_methods,
  171         sizeof(struct ar71xx_caldata_softc),
  172 };
  173 
  174 static devclass_t ar71xx_caldata_devclass;
  175 
  176 DRIVER_MODULE(ar71xx_caldata, nexus, ar71xx_caldata_driver, ar71xx_caldata_devclass, 0, 0);

Cache object: 85fc80d417fa976fd00f8ae49177a178


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