The Design and Implementation of the FreeBSD Operating System, Second Edition
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FreeBSD/Linux Kernel Cross Reference
sys/arm/xscale/ixp425/ixp425.c

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    1 /*      $NetBSD: ixp425.c,v 1.10 2005/12/11 12:16:51 christos Exp $ */
    2 
    3 /*
    4  * Copyright (c) 2003
    5  *      Ichiro FUKUHARA <ichiro@ichiro.org>.
    6  * All rights reserved.
    7  *
    8  * Redistribution and use in source and binary forms, with or without
    9  * modification, are permitted provided that the following conditions
   10  * are met:
   11  * 1. Redistributions of source code must retain the above copyright
   12  *    notice, this list of conditions and the following disclaimer.
   13  * 2. Redistributions in binary form must reproduce the above copyright
   14  *    notice, this list of conditions and the following disclaimer in the
   15  *    documentation and/or other materials provided with the distribution.
   16  * 3. All advertising materials mentioning features or use of this software
   17  *    must display the following acknowledgement:
   18  *      This product includes software developed by Ichiro FUKUHARA.
   19  * 4. The name of the company nor the name of the author may be used to
   20  *    endorse or promote products derived from this software without specific
   21  *    prior written permission.
   22  *
   23  * THIS SOFTWARE IS PROVIDED BY ICHIRO FUKUHARA ``AS IS'' AND ANY EXPRESS OR
   24  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
   25  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
   26  * IN NO EVENT SHALL ICHIRO FUKUHARA OR THE VOICES IN HIS HEAD BE LIABLE FOR
   27  * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   28  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   29  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   30  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   31  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   32  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   33  * SUCH DAMAGE.
   34  */
   35 
   36 #include <sys/cdefs.h>
   37 __FBSDID("$FreeBSD$");
   38 
   39 #define _ARM32_BUS_DMA_PRIVATE
   40 #include <sys/param.h>
   41 #include <sys/systm.h>
   42 #include <sys/bus.h>
   43 #include <sys/kernel.h>
   44 #include <sys/module.h>
   45 #include <sys/malloc.h>
   46 #include <sys/rman.h>
   47 #include <machine/bus.h>
   48 #include <machine/intr.h>
   49 
   50 #include <vm/vm.h>
   51 #include <vm/pmap.h>
   52 #include <arm/xscale/ixp425/ixp425reg.h>
   53 #include <arm/xscale/ixp425/ixp425var.h>
   54 #include <arm/xscale/ixp425/ixp425_intr.h>
   55 
   56 #include <dev/pci/pcireg.h>
   57 
   58 volatile uint32_t intr_enabled;
   59 uint32_t intr_steer = 0;
   60 
   61 struct  ixp425_softc *ixp425_softc = NULL;
   62 
   63 static int      ixp425_probe(device_t);
   64 static void     ixp425_identify(driver_t *, device_t);
   65 static int      ixp425_attach(device_t);
   66 
   67 static struct {
   68         uint32_t        hwbase;
   69         uint32_t        size;
   70         uint32_t        vbase;
   71 } hwvtrans[] = {
   72         { IXP425_IO_HWBASE,     IXP425_IO_SIZE,         IXP425_IO_VBASE },
   73         { IXP425_EXP_HWBASE,    IXP425_EXP_SIZE,        IXP425_EXP_VBASE },
   74         { IXP425_PCI_HWBASE,    IXP425_PCI_SIZE,        IXP425_PCI_VBASE },
   75         { IXP425_PCI_MEM_HWBASE,IXP425_PCI_MEM_SIZE,    IXP425_PCI_MEM_VBASE },
   76 #if 0
   77         { IXP425_PCI_IO_HWBASE, IXP425_PCI_IO_SIZE,     IXP425_PCI_IO_VBASE },
   78 #endif
   79         { IXP425_MCU_HWBASE,    IXP425_MCU_SIZE,        IXP425_MCU_VBASE },
   80         { IXP425_QMGR_HWBASE,   IXP425_QMGR_SIZE,       IXP425_QMGR_VBASE },
   81         { IXP425_NPE_A_HWBASE,  IXP425_NPE_A_SIZE,      IXP425_NPE_A_VBASE },
   82         { IXP425_NPE_B_HWBASE,  IXP425_NPE_B_SIZE,      IXP425_NPE_B_VBASE },
   83         { IXP425_NPE_C_HWBASE,  IXP425_NPE_C_SIZE,      IXP425_NPE_C_VBASE },
   84         { IXP425_MAC_A_HWBASE,  IXP425_MAC_A_SIZE,      IXP425_MAC_A_VBASE },
   85         { IXP425_MAC_B_HWBASE,  IXP425_MAC_B_SIZE,      IXP425_MAC_B_VBASE },
   86         /* Gateworks Avila IDE/CF is mapped here */
   87         { IXP425_EXP_BUS_CS1_HWBASE, IXP425_EXP_BUS_SIZE,
   88           IXP425_EXP_BUS_CS1_VBASE },
   89         { IXP425_EXP_BUS_CS2_HWBASE, IXP425_EXP_BUS_SIZE,
   90           IXP425_EXP_BUS_CS2_VBASE },
   91         /* ADI Pronghorn Metro IDE/CF is mapped here */
   92         { IXP425_EXP_BUS_CS3_HWBASE, IXP425_EXP_BUS_SIZE,
   93           IXP425_EXP_BUS_CS3_VBASE },
   94         { IXP425_EXP_BUS_CS4_HWBASE, IXP425_EXP_BUS_SIZE,
   95           IXP425_EXP_BUS_CS4_VBASE },
   96 };
   97 
   98 int
   99 getvbase(uint32_t hwbase, uint32_t size, uint32_t *vbase)
  100 {
  101         int i;
  102 
  103         for (i = 0; i < sizeof hwvtrans / sizeof *hwvtrans; i++) {
  104                 if (hwbase >= hwvtrans[i].hwbase &&
  105                     hwbase + size <= hwvtrans[i].hwbase + hwvtrans[i].size) {
  106                         *vbase = hwbase - hwvtrans[i].hwbase + hwvtrans[i].vbase;
  107                         return (0);
  108                 }
  109         }
  110 
  111         return (ENOENT);
  112 }
  113 
  114 struct arm32_dma_range *
  115 bus_dma_get_range(void)
  116 {
  117         return (NULL);
  118 }
  119 
  120 int
  121 bus_dma_get_range_nb(void)
  122 {
  123         return (0);
  124 }
  125 
  126 static __inline u_int32_t
  127 ixp425_irq2gpio_bit(int irq)
  128 {
  129 
  130         static const uint8_t int2gpio[32] __attribute__ ((aligned(32))) = {
  131                 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,     /* INT#0 -> INT#5 */
  132                 0x00, 0x01,                             /* GPIO#0 -> GPIO#1 */
  133                 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,     /* INT#8 -> INT#13 */
  134                 0xff, 0xff, 0xff, 0xff, 0xff,           /* INT#14 -> INT#18 */
  135                 0x02, 0x03, 0x04, 0x05, 0x06, 0x07,     /* GPIO#2 -> GPIO#7 */
  136                 0x08, 0x09, 0x0a, 0x0b, 0x0c,           /* GPIO#8 -> GPIO#12 */
  137                 0xff, 0xff                              /* INT#30 -> INT#31 */
  138         };
  139 
  140         return (1U << int2gpio[irq]);
  141 }
  142 
  143 void
  144 arm_mask_irq(uintptr_t nb)
  145 {
  146         intr_enabled &= ~(1 << nb);
  147         ixp425_set_intrmask();
  148         /*XXX; If it's a GPIO interrupt, ACK it know. Can it be a problem ?*/
  149         if ((1 << nb) & IXP425_INT_GPIOMASK)
  150                 IXPREG(IXP425_GPIO_VBASE + IXP425_GPIO_GPISR) =
  151                     ixp425_irq2gpio_bit(nb);
  152 
  153                 
  154 }
  155 
  156 void
  157 arm_unmask_irq(uintptr_t nb)
  158 {
  159 
  160         intr_enabled |= (1 << nb);
  161         ixp425_set_intrmask();
  162 }
  163 
  164 static __inline uint32_t
  165 ixp425_irq_read(void)
  166 {
  167         return IXPREG(IXP425_INT_STATUS) & intr_enabled;
  168 }
  169 
  170 int
  171 arm_get_next_irq(void)
  172 {
  173         int irq;
  174 
  175         if ((irq = ixp425_irq_read()))
  176                 return (ffs(irq) - 1);
  177         return (-1);
  178 }
  179 
  180 void
  181 cpu_reset(void)
  182 {
  183 
  184         bus_space_write_4(&ixp425_bs_tag, IXP425_TIMER_VBASE,
  185             IXP425_OST_WDOG_KEY, OST_WDOG_KEY_MAJICK);
  186         bus_space_write_4(&ixp425_bs_tag, IXP425_TIMER_VBASE,
  187             IXP425_OST_WDOG, 0);
  188         bus_space_write_4(&ixp425_bs_tag, IXP425_TIMER_VBASE,
  189             IXP425_OST_WDOG_ENAB, OST_WDOG_ENAB_RST_ENA |
  190             OST_WDOG_ENAB_CNT_ENA);
  191         printf("Reset failed!\n");
  192         for(;;);
  193 }
  194 
  195 static void
  196 ixp425_identify(driver_t *driver, device_t parent)
  197 {
  198         BUS_ADD_CHILD(parent, 0, "ixp", 0);
  199 }
  200 
  201 static int
  202 ixp425_probe(device_t dev)
  203 {
  204         device_set_desc(dev, "Intel IXP425");
  205         return (0);
  206 }
  207 
  208 static int
  209 ixp425_attach(device_t dev)
  210 {
  211         struct ixp425_softc *sc;
  212 
  213         sc = device_get_softc(dev);
  214         sc->sc_iot = &ixp425_bs_tag;
  215         KASSERT(ixp425_softc == NULL, ("ixp425_attach called twice?"));
  216         ixp425_softc = sc;
  217 
  218         intr_enabled = 0;
  219         ixp425_set_intrmask();
  220         ixp425_set_intrsteer();
  221 
  222         if (bus_dma_tag_create(NULL, 1, 0, BUS_SPACE_MAXADDR_32BIT,
  223             BUS_SPACE_MAXADDR, NULL, NULL,  0xffffffff, 0xff, 0xffffffff, 0, 
  224             NULL, NULL, &sc->sc_dmat))
  225                 panic("couldn't create the IXP425 dma tag !");
  226 
  227         sc->sc_irq_rman.rm_type = RMAN_ARRAY;
  228         sc->sc_irq_rman.rm_descr = "IXP425 IRQs";
  229         if (rman_init(&sc->sc_irq_rman) != 0 ||
  230             rman_manage_region(&sc->sc_irq_rman, 0, 31) != 0)
  231                 panic("ixp425_attach: failed to set up IRQ rman");
  232 
  233         sc->sc_mem_rman.rm_type = RMAN_ARRAY;
  234         sc->sc_mem_rman.rm_descr = "IXP425 Memory";
  235         if (rman_init(&sc->sc_mem_rman) != 0 ||
  236             rman_manage_region(&sc->sc_mem_rman, 0, ~0) != 0)
  237                 panic("ixp425_attach: failed to set up IRQ rman");
  238 
  239         BUS_ADD_CHILD(dev, 0, "pcib", 0);
  240         BUS_ADD_CHILD(dev, 0, "ixpclk", 0);
  241         BUS_ADD_CHILD(dev, 0, "ixpiic", 0);
  242         /* XXX move to hints? */
  243         BUS_ADD_CHILD(dev, 0, "ixpwdog", 0);
  244 
  245         /* attach wired devices via hints */
  246         bus_enumerate_hinted_children(dev);
  247 
  248         if (bus_space_map(sc->sc_iot, IXP425_GPIO_HWBASE, IXP425_GPIO_SIZE,
  249             0, &sc->sc_gpio_ioh))
  250                 panic("ixp425_attach: unable to map GPIO registers");
  251         if (bus_space_map(sc->sc_iot, IXP425_EXP_HWBASE, IXP425_EXP_SIZE,
  252             0, &sc->sc_exp_ioh))
  253                 panic("ixp425_attach: unable to map Expansion Bus registers");
  254 
  255         bus_generic_probe(dev);
  256         bus_generic_attach(dev);
  257 
  258         return (0);
  259 }
  260 
  261 static void
  262 ixp425_hinted_child(device_t bus, const char *dname, int dunit)
  263 {
  264         device_t child;
  265         struct ixp425_ivar *ivar;
  266 
  267         child = BUS_ADD_CHILD(bus, 0, dname, dunit);
  268         ivar = IXP425_IVAR(child);
  269         resource_int_value(dname, dunit, "addr", &ivar->addr);
  270         resource_int_value(dname, dunit, "irq", &ivar->irq);
  271 }
  272 
  273 static device_t
  274 ixp425_add_child(device_t dev, int order, const char *name, int unit)
  275 {
  276         device_t child;
  277         struct ixp425_ivar *ivar;
  278 
  279         child = device_add_child_ordered(dev, order, name, unit);
  280         if (child == NULL)
  281                 return NULL;
  282         ivar = malloc(sizeof(struct ixp425_ivar), M_DEVBUF, M_NOWAIT);
  283         if (ivar == NULL) {
  284                 device_delete_child(dev, child);
  285                 return NULL;
  286         }
  287         ivar->addr = 0;
  288         ivar->irq = -1;
  289         device_set_ivars(child, ivar);
  290         return child;
  291 }
  292 
  293 static int
  294 ixp425_read_ivar(device_t bus, device_t child, int which, u_char *result)
  295 {
  296         struct ixp425_ivar *ivar = IXP425_IVAR(child);
  297 
  298         switch (which) {
  299         case IXP425_IVAR_ADDR:
  300                 if (ivar->addr != 0) {
  301                         *(uint32_t *)result = ivar->addr;
  302                         return 0;
  303                 }
  304                 break;
  305         case IXP425_IVAR_IRQ:
  306                 if (ivar->irq != -1) {
  307                         *(int *)result = ivar->irq;
  308                         return 0;
  309                 }
  310                 break;
  311         }
  312         return EINVAL;
  313 }
  314 
  315 static struct resource *
  316 ixp425_alloc_resource(device_t dev, device_t child, int type, int *rid,
  317     u_long start, u_long end, u_long count, u_int flags)
  318 {
  319         struct ixp425_softc *sc = device_get_softc(dev);
  320         struct rman *rmanp;
  321         struct resource *rv;
  322         uint32_t vbase, addr;
  323         int irq;
  324 
  325         switch (type) {
  326         case SYS_RES_IRQ:
  327                 rmanp = &sc->sc_irq_rman;
  328                 /* override per hints */
  329                 if (BUS_READ_IVAR(dev, child, IXP425_IVAR_IRQ, &irq) == 0)
  330                         start = end = irq;
  331                 rv = rman_reserve_resource(rmanp, start, end, count,
  332                         flags, child);
  333                 if (rv != NULL)
  334                         rman_set_rid(rv, *rid);
  335                 break;
  336 
  337         case SYS_RES_MEMORY:
  338                 rmanp = &sc->sc_mem_rman;
  339                 /* override per hints */
  340                 if (BUS_READ_IVAR(dev, child, IXP425_IVAR_ADDR, &addr) == 0) {
  341                         start = addr;
  342                         end = start + 0x1000;   /* XXX */
  343                 }
  344                 if (getvbase(start, end - start, &vbase))
  345                         return NULL;
  346                 rv = rman_reserve_resource(rmanp, start, end, count,
  347                         flags, child);
  348                 if (rv != NULL) {
  349                         rman_set_rid(rv, *rid);
  350                         if (strcmp(device_get_name(child), "uart") == 0)
  351                                 rman_set_bustag(rv, &ixp425_a4x_bs_tag);
  352                         else
  353                                 rman_set_bustag(rv, sc->sc_iot);
  354                         rman_set_bushandle(rv, vbase);
  355                 }
  356                 break;
  357         default:
  358                 rv = NULL;
  359                 break;
  360         }
  361         return rv;
  362 }
  363 
  364 static int
  365 ixp425_setup_intr(device_t dev, device_t child,
  366     struct resource *ires, int flags, driver_filter_t *filt, 
  367     driver_intr_t *intr, void *arg, void **cookiep)    
  368 {
  369         uint32_t mask;
  370         int i;
  371 
  372         BUS_SETUP_INTR(device_get_parent(dev), child, ires, flags, filt, intr,
  373              arg, cookiep);
  374 
  375         mask = 0;
  376         for (i = rman_get_start(ires); i <= rman_get_end(ires); i++)
  377                 mask |= 1 << i;
  378         intr_enabled |= mask;
  379         ixp425_set_intrmask();
  380 
  381         return (0);
  382 }
  383 
  384 static int
  385 ixp425_teardown_intr(device_t dev, device_t child, struct resource *res,
  386     void *cookie)
  387 {
  388         uint32_t mask;
  389         int i;
  390 
  391         mask = 0;
  392         for (i = rman_get_start(res); i <= rman_get_end(res); i++)
  393                 mask |= 1 << i;
  394         intr_enabled &= ~mask;
  395         ixp425_set_intrmask();
  396 
  397         return (BUS_TEARDOWN_INTR(device_get_parent(dev), child, res, cookie));
  398 }
  399 
  400 static device_method_t ixp425_methods[] = {
  401         /* Device interface */
  402         DEVMETHOD(device_probe, ixp425_probe),
  403         DEVMETHOD(device_attach, ixp425_attach),
  404         DEVMETHOD(device_identify, ixp425_identify),
  405 
  406         /* Bus interface */
  407         DEVMETHOD(bus_add_child, ixp425_add_child),
  408         DEVMETHOD(bus_hinted_child, ixp425_hinted_child),
  409         DEVMETHOD(bus_read_ivar, ixp425_read_ivar),
  410 
  411         DEVMETHOD(bus_alloc_resource, ixp425_alloc_resource),
  412         DEVMETHOD(bus_setup_intr, ixp425_setup_intr),
  413         DEVMETHOD(bus_teardown_intr, ixp425_teardown_intr),
  414 
  415         {0, 0},
  416 };
  417 
  418 static driver_t ixp425_driver = {
  419         "ixp",
  420         ixp425_methods,
  421         sizeof(struct ixp425_softc),
  422 };
  423 static devclass_t ixp425_devclass;
  424 
  425 DRIVER_MODULE(ixp, nexus, ixp425_driver, ixp425_devclass, 0, 0);

Cache object: 73f92f0ea70b986ea7494c214264d76a


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