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/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 };
   90 
   91 static int
   92 getvbase(uint32_t hwbase, uint32_t size, uint32_t *vbase)
   93 {
   94         int i;
   95 
   96         for (i = 0; i < sizeof hwvtrans / sizeof *hwvtrans; i++) {
   97                 if (hwbase >= hwvtrans[i].hwbase &&
   98                     hwbase + size <= hwvtrans[i].hwbase + hwvtrans[i].size) {
   99                         *vbase = hwbase - hwvtrans[i].hwbase + hwvtrans[i].vbase;
  100                         return (0);
  101                 }
  102         }
  103 
  104         return (ENOENT);
  105 }
  106 
  107 struct arm32_dma_range *
  108 bus_dma_get_range(void)
  109 {
  110         return (NULL);
  111 }
  112 
  113 int
  114 bus_dma_get_range_nb(void)
  115 {
  116         return (0);
  117 }
  118 
  119 static __inline u_int32_t
  120 ixp425_irq2gpio_bit(int irq)
  121 {
  122 
  123         static const uint8_t int2gpio[32] __attribute__ ((aligned(32))) = {
  124                 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,     /* INT#0 -> INT#5 */
  125                 0x00, 0x01,                             /* GPIO#0 -> GPIO#1 */
  126                 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,     /* INT#8 -> INT#13 */
  127                 0xff, 0xff, 0xff, 0xff, 0xff,           /* INT#14 -> INT#18 */
  128                 0x02, 0x03, 0x04, 0x05, 0x06, 0x07,     /* GPIO#2 -> GPIO#7 */
  129                 0x08, 0x09, 0x0a, 0x0b, 0x0c,           /* GPIO#8 -> GPIO#12 */
  130                 0xff, 0xff                              /* INT#30 -> INT#31 */
  131         };
  132 
  133         return (1U << int2gpio[irq]);
  134 }
  135 
  136 void
  137 arm_mask_irq(uintptr_t nb)
  138 {
  139         intr_enabled &= ~(1 << nb);
  140         ixp425_set_intrmask();
  141         /*XXX; If it's a GPIO interrupt, ACK it know. Can it be a problem ?*/
  142         if ((1 << nb) & IXP425_INT_GPIOMASK)
  143                 IXPREG(IXP425_GPIO_VBASE + IXP425_GPIO_GPISR) =
  144                     ixp425_irq2gpio_bit(nb);
  145 
  146                 
  147 }
  148 
  149 void
  150 arm_unmask_irq(uintptr_t nb)
  151 {
  152         intr_enabled |= (1 << nb);
  153         ixp425_set_intrmask();
  154 }
  155 
  156 static __inline uint32_t
  157 ixp425_irq_read(void)
  158 {
  159         return IXPREG(IXP425_INT_STATUS) & intr_enabled;
  160 }
  161 
  162 int
  163 arm_get_next_irq(void)
  164 {
  165         int irq;
  166 
  167         if ((irq = ixp425_irq_read()))
  168                 return (ffs(irq) - 1);
  169         return (-1);
  170 }
  171 
  172 void
  173 cpu_reset(void)
  174 {
  175 
  176         bus_space_write_4(&ixp425_bs_tag, IXP425_TIMER_VBASE,
  177             IXP425_OST_WDOG_KEY, OST_WDOG_KEY_MAJICK);
  178         bus_space_write_4(&ixp425_bs_tag, IXP425_TIMER_VBASE,
  179             IXP425_OST_WDOG, 0);
  180         bus_space_write_4(&ixp425_bs_tag, IXP425_TIMER_VBASE,
  181             IXP425_OST_WDOG_ENAB, OST_WDOG_ENAB_RST_ENA |
  182             OST_WDOG_ENAB_CNT_ENA);
  183         printf("Reset failed!\n");
  184         for(;;);
  185 }
  186 
  187 static void
  188 ixp425_identify(driver_t *driver, device_t parent)
  189 {
  190         BUS_ADD_CHILD(parent, 0, "ixp", 0);
  191 }
  192 
  193 static int
  194 ixp425_probe(device_t dev)
  195 {
  196         device_set_desc(dev, "Intel IXP425");
  197         return (0);
  198 }
  199 
  200 static int
  201 ixp425_attach(device_t dev)
  202 {
  203         struct ixp425_softc *sc;
  204 
  205         sc = device_get_softc(dev);
  206         sc->sc_iot = &ixp425_bs_tag;
  207         KASSERT(ixp425_softc == NULL, ("ixp425_attach called twice?"));
  208         ixp425_softc = sc;
  209 
  210         intr_enabled = 0;
  211         ixp425_set_intrmask();
  212         ixp425_set_intrsteer();
  213 
  214         sc->sc_irq_rman.rm_type = RMAN_ARRAY;
  215         sc->sc_irq_rman.rm_descr = "IXP425 IRQs";
  216         if (rman_init(&sc->sc_irq_rman) != 0 ||
  217             rman_manage_region(&sc->sc_irq_rman, 0, 31) != 0)
  218                 panic("ixp425_attach: failed to set up IRQ rman");
  219 
  220         sc->sc_mem_rman.rm_type = RMAN_ARRAY;
  221         sc->sc_mem_rman.rm_descr = "IXP425 Memory";
  222         if (rman_init(&sc->sc_mem_rman) != 0 ||
  223             rman_manage_region(&sc->sc_mem_rman, 0, ~0) != 0)
  224                 panic("ixp425_attach: failed to set up IRQ rman");
  225 
  226         device_add_child(dev, "pcib", 0);
  227         device_add_child(dev, "ixpclk", 0);
  228         device_add_child(dev, "ixpwdog", 0);
  229         device_add_child(dev, "ixpiic", 0);
  230         device_add_child(dev, "uart", 0);
  231         /* XXX these are optional, what if they are not configured? */
  232         device_add_child(dev, "ixpqmgr", 0);
  233         device_add_child(dev, "npe", 0);        /* NPE-B */
  234         device_add_child(dev, "npe", 1);        /* NPE-C */
  235         device_add_child(dev, "ata_avila", 0);  /* XXX */
  236         device_add_child(dev, "led_avila", 0);
  237 
  238         if (bus_space_map(sc->sc_iot, IXP425_GPIO_HWBASE, IXP425_GPIO_SIZE,
  239             0, &sc->sc_gpio_ioh))
  240                 panic("ixp425_attach: unable to map GPIO registers");
  241         if (bus_space_map(sc->sc_iot, IXP425_EXP_HWBASE, IXP425_EXP_SIZE,
  242             0, &sc->sc_exp_ioh))
  243                 panic("ixp425_attach: unable to map Expansion Bus registers");
  244 
  245         bus_generic_probe(dev);
  246         bus_generic_attach(dev);
  247 
  248         return (0);
  249 }
  250 
  251 static struct resource *
  252 ixp425_alloc_resource(device_t dev, device_t child, int type, int *rid,
  253     u_long start, u_long end, u_long count, u_int flags)
  254 {
  255         struct ixp425_softc *sc = device_get_softc(dev);
  256         struct rman *rmanp;
  257         struct resource *rv;
  258         uint32_t vbase;
  259         int isuart = (start == 0 && end == ~0); /* XXX how to do this right? */
  260 
  261         rv = NULL;
  262 
  263         switch (type) {
  264         case SYS_RES_IRQ:
  265                 rmanp = &sc->sc_irq_rman;
  266                 if (isuart) {
  267                         if (device_get_unit(dev) == 0) 
  268                                 start = IXP425_INT_UART0;
  269                         else
  270                                 start = IXP425_INT_UART1;
  271                         end = start;
  272                 }
  273                 break;
  274 
  275         case SYS_RES_MEMORY:
  276                 rmanp = &sc->sc_mem_rman;
  277                 if (isuart) {
  278                         if (device_get_unit(dev) == 0) 
  279                                 start = IXP425_UART0_HWBASE;
  280                         else
  281                                 start = IXP425_UART1_HWBASE;
  282                         end = start + 0x1000;
  283                 }
  284                 if (getvbase(start, end - start, &vbase))
  285                         return (rv);
  286                 break;
  287 
  288         default:
  289                 return (rv);
  290         }
  291 
  292         rv = rman_reserve_resource(rmanp, start, end, count, flags, child);
  293         if (rv != NULL) {
  294                 rman_set_rid(rv, *rid);
  295                 if (type == SYS_RES_MEMORY) {
  296                         rman_set_bustag(rv,
  297                             isuart ? &ixp425_a4x_bs_tag : sc->sc_iot);
  298                         rman_set_bushandle(rv, vbase);
  299                 }
  300         }
  301 
  302         return (rv);
  303 }
  304 
  305 static int
  306 ixp425_setup_intr(device_t dev, device_t child,
  307     struct resource *ires, int flags, driver_intr_t *intr, void *arg,
  308     void **cookiep)
  309 {
  310         uint32_t mask;
  311         int i;
  312 
  313         if (flags & INTR_TYPE_TTY) {
  314                 /* XXX: wrong. */
  315                 if (device_get_unit(dev) == 0)
  316                         rman_set_start(ires, IXP425_INT_UART0);
  317                 else
  318                         rman_set_start(ires, IXP425_INT_UART1);
  319                 rman_set_end(ires, rman_get_start(ires));
  320         }
  321         BUS_SETUP_INTR(device_get_parent(dev), child, ires, flags, intr, arg,
  322             cookiep);
  323 
  324         mask = 0;
  325         for (i = rman_get_start(ires); i <= rman_get_end(ires); i++)
  326                 mask |= 1 << i;
  327         intr_enabled |= mask;
  328         ixp425_set_intrmask();
  329 
  330         return (0);
  331 }
  332 
  333 static int
  334 ixp425_teardown_intr(device_t dev, device_t child, struct resource *res,
  335     void *cookie)
  336 {
  337         uint32_t mask;
  338         int i;
  339 
  340         mask = 0;
  341         for (i = rman_get_start(res); i <= rman_get_end(res); i++)
  342                 mask |= 1 << i;
  343         intr_enabled &= ~mask;
  344         ixp425_set_intrmask();
  345 
  346         return (BUS_TEARDOWN_INTR(device_get_parent(dev), child, res, cookie));
  347 }
  348 
  349 static device_method_t ixp425_methods[] = {
  350         /* Device interface */
  351         DEVMETHOD(device_probe, ixp425_probe),
  352         DEVMETHOD(device_attach, ixp425_attach),
  353         DEVMETHOD(device_identify, ixp425_identify),
  354 
  355         /* Bus interface */
  356         DEVMETHOD(bus_alloc_resource, ixp425_alloc_resource),
  357         DEVMETHOD(bus_setup_intr, ixp425_setup_intr),
  358         DEVMETHOD(bus_teardown_intr, ixp425_teardown_intr),
  359 
  360         {0, 0},
  361 };
  362 
  363 static driver_t ixp425_driver = {
  364         "ixp",
  365         ixp425_methods,
  366         sizeof(struct ixp425_softc),
  367 };
  368 static devclass_t ixp425_devclass;
  369 
  370 DRIVER_MODULE(ixp, nexus, ixp425_driver, ixp425_devclass, 0, 0);

Cache object: 4a153e5562a6edacf962b5ab623dc375


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