679 lines
16 KiB
C
679 lines
16 KiB
C
/*-
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* Copyright (c) 2005 Olivier Houchard. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/bus.h>
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#include <sys/kernel.h>
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#include <sys/malloc.h>
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#include <sys/module.h>
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#include <vm/vm.h>
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#include <vm/vm_kern.h>
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#include <vm/pmap.h>
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#include <vm/vm_page.h>
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#include <vm/vm_extern.h>
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#define _ARM32_BUS_DMA_PRIVATE
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#include <machine/bus.h>
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#include <machine/intr.h>
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#include <arm/at91/at91rm92reg.h>
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#include <arm/at91/at91var.h>
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static struct at91_softc *at91_softc;
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static int
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at91_bs_map(void *t, bus_addr_t bpa, bus_size_t size, int flags,
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bus_space_handle_t *bshp)
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{
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vm_paddr_t pa, endpa;
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pa = trunc_page(bpa);
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if (pa >= 0xfff00000) {
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*bshp = pa - 0xf0000000 + 0xd0000000;
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return (0);
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}
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if (pa >= 0xdff00000)
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return (0);
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endpa = round_page(bpa + size);
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*bshp = (vm_offset_t)pmap_mapdev(pa, endpa - pa);
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return (0);
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}
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static void
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at91_bs_unmap(void *t, bus_space_handle_t h, bus_size_t size)
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{
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vm_offset_t va, endva;
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va = trunc_page((vm_offset_t)t);
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endva = va + round_page(size);
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/* Free the kernel virtual mapping. */
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kmem_free(kernel_map, va, endva - va);
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}
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static int
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at91_bs_subregion(void *t, bus_space_handle_t bsh, bus_size_t offset,
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bus_size_t size, bus_space_handle_t *nbshp)
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{
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*nbshp = bsh + offset;
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return (0);
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}
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static void
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at91_barrier(void *t, bus_space_handle_t bsh, bus_size_t size, bus_size_t b,
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int a)
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{
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}
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bs_protos(generic);
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bs_protos(generic_armv4);
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struct bus_space at91_bs_tag = {
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/* cookie */
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(void *) 0,
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/* mapping/unmapping */
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at91_bs_map,
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at91_bs_unmap,
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at91_bs_subregion,
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/* allocation/deallocation */
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NULL,
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NULL,
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/* barrier */
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at91_barrier,
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/* read (single) */
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generic_bs_r_1,
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generic_armv4_bs_r_2,
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generic_bs_r_4,
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NULL,
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/* read multiple */
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generic_bs_rm_1,
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generic_armv4_bs_rm_2,
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generic_bs_rm_4,
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NULL,
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/* read region */
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generic_bs_rr_1,
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generic_armv4_bs_rr_2,
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generic_bs_rr_4,
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NULL,
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/* write (single) */
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generic_bs_w_1,
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generic_armv4_bs_w_2,
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generic_bs_w_4,
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NULL,
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/* write multiple */
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generic_bs_wm_1,
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generic_armv4_bs_wm_2,
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generic_bs_wm_4,
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NULL,
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/* write region */
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NULL,
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generic_armv4_bs_wr_2,
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generic_bs_wr_4,
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NULL,
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/* set multiple */
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NULL,
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NULL,
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NULL,
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NULL,
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/* set region */
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NULL,
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generic_armv4_bs_sr_2,
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generic_bs_sr_4,
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NULL,
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/* copy */
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NULL,
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generic_armv4_bs_c_2,
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NULL,
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NULL,
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};
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static int
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at91_probe(device_t dev)
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{
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device_set_desc(dev, "AT91 device bus");
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return (0);
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}
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static void
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at91_identify(driver_t *drv, device_t parent)
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{
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BUS_ADD_CHILD(parent, 0, "atmelarm", 0);
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}
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struct arm32_dma_range *
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bus_dma_get_range(void)
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{
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return (NULL);
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}
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int
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bus_dma_get_range_nb(void)
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{
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return (0);
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}
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extern void irq_entry(void);
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static void
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at91_add_child(device_t dev, int prio, const char *name, int unit,
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bus_addr_t addr, bus_size_t size, int irq0, int irq1, int irq2)
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{
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device_t kid;
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struct at91_ivar *ivar;
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kid = device_add_child_ordered(dev, prio, name, unit);
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if (kid == NULL) {
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printf("Can't add child %s%d ordered\n", name, unit);
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return;
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}
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ivar = malloc(sizeof(*ivar), M_DEVBUF, M_WAITOK | M_ZERO);
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if (ivar == NULL) {
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device_delete_child(dev, kid);
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printf("Can't add alloc ivar\n");
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return;
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}
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device_set_ivars(kid, ivar);
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resource_list_init(&ivar->resources);
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if (irq0 != -1)
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bus_set_resource(kid, SYS_RES_IRQ, 0, irq0, 1);
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if (irq1 != 0)
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bus_set_resource(kid, SYS_RES_IRQ, 1, irq1, 1);
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if (irq2 != 0)
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bus_set_resource(kid, SYS_RES_IRQ, 2, irq2, 1);
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if (addr != 0)
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bus_set_resource(kid, SYS_RES_MEMORY, 0, addr, size);
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}
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struct cpu_devs
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{
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const char *name;
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int unit;
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bus_addr_t mem_base;
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bus_size_t mem_len;
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int irq0;
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int irq1;
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int irq2;
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};
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struct cpu_devs at91rm9200_devs[] =
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{
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// All the "system" devices
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{
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"at91_st", 0,
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AT91RM92_BASE + AT91RM92_ST_BASE, AT91RM92_ST_SIZE,
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AT91RM92_IRQ_SYSTEM
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},
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{
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"at91_pio", 0,
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AT91RM92_BASE + AT91RM92_PIOA_BASE, AT91RM92_PIO_SIZE,
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AT91RM92_IRQ_SYSTEM
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},
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{
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"at91_pio", 1,
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AT91RM92_BASE + AT91RM92_PIOB_BASE, AT91RM92_PIO_SIZE,
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AT91RM92_IRQ_SYSTEM
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},
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{
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"at91_pio", 2,
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AT91RM92_BASE + AT91RM92_PIOC_BASE, AT91RM92_PIO_SIZE,
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AT91RM92_IRQ_SYSTEM
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},
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{
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"at91_pio", 3,
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AT91RM92_BASE + AT91RM92_PIOD_BASE, AT91RM92_PIO_SIZE,
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AT91RM92_IRQ_SYSTEM
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},
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{
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"at91_pmc", 0,
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AT91RM92_BASE + AT91RM92_PMC_BASE, AT91RM92_PMC_SIZE,
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AT91RM92_IRQ_SYSTEM
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},
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{
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"at91_aic", 0,
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AT91RM92_BASE + AT91RM92_AIC_BASE, AT91RM92_AIC_SIZE,
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0 // Interrupt controller has no interrupts!
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},
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{
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"at91_rtc", 0,
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AT91RM92_BASE + AT91RM92_RTC_BASE, AT91RM92_RTC_SIZE,
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AT91RM92_IRQ_SYSTEM
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},
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{
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"at91_mc", 0,
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AT91RM92_BASE + AT91RM92_MC_BASE, AT91RM92_MC_SIZE,
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AT91RM92_IRQ_SYSTEM
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},
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// All other devices
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{
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"at91_tc", 0,
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AT91RM92_BASE + AT91RM92_TC0_BASE, AT91RM92_TC_SIZE,
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AT91RM92_IRQ_TC0, AT91RM92_IRQ_TC1, AT91RM92_IRQ_TC2
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},
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{
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"at91_tc", 1,
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AT91RM92_BASE + AT91RM92_TC1_BASE, AT91RM92_TC_SIZE,
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AT91RM92_IRQ_TC3, AT91RM92_IRQ_TC4, AT91RM92_IRQ_TC5
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},
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{
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"at91_udp", 0,
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AT91RM92_BASE + AT91RM92_UDP_BASE, AT91RM92_UDP_SIZE,
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AT91RM92_IRQ_UDP
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},
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{
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"at91_mci", 0,
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AT91RM92_BASE + AT91RM92_MCI_BASE, AT91RM92_MCI_SIZE,
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AT91RM92_IRQ_MCI
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},
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{
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"at91_twi", 0,
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AT91RM92_BASE + AT91RM92_TWI_BASE, AT91RM92_TWI_SIZE,
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AT91RM92_IRQ_TWI
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},
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{
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"ate", 0,
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AT91RM92_BASE + AT91RM92_EMAC_BASE, AT91RM92_EMAC_SIZE,
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AT91RM92_IRQ_EMAC
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},
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#ifndef SKYEYE_WORKAROUNDS
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{
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"uart", 0,
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AT91RM92_BASE + AT91RM92_DBGU_BASE, AT91RM92_DBGU_SIZE,
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AT91RM92_IRQ_SYSTEM
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},
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{
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"uart", 1,
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AT91RM92_BASE + AT91RM92_USART0_BASE, AT91RM92_USART_SIZE,
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AT91RM92_IRQ_USART0
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},
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{
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"uart", 2,
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AT91RM92_BASE + AT91RM92_USART1_BASE, AT91RM92_USART_SIZE,
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AT91RM92_IRQ_USART1
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},
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{
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"uart", 3,
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AT91RM92_BASE + AT91RM92_USART2_BASE, AT91RM92_USART_SIZE,
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AT91RM92_IRQ_USART2
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},
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{
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"uart", 4,
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AT91RM92_BASE + AT91RM92_USART3_BASE, AT91RM92_USART_SIZE,
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AT91RM92_IRQ_USART3
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},
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#else
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{
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"uart", 0,
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AT91RM92_BASE + AT91RM92_USART0_BASE, AT91RM92_USART_SIZE,
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AT91RM92_IRQ_USART0
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},
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#endif
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{
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"at91_ssc", 0,
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AT91RM92_BASE + AT91RM92_SSC0_BASE, AT91RM92_SSC_SIZE,
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AT91RM92_IRQ_SSC0
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},
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{
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"at91_ssc", 1,
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AT91RM92_BASE + AT91RM92_SSC1_BASE, AT91RM92_SSC_SIZE,
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AT91RM92_IRQ_SSC1
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},
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{
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"at91_ssc", 2,
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AT91RM92_BASE + AT91RM92_SSC2_BASE, AT91RM92_SSC_SIZE,
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AT91RM92_IRQ_SSC2
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},
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{
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"at91_spi", 0,
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AT91RM92_BASE + AT91RM92_SPI_BASE, AT91RM92_SPI_SIZE,
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AT91RM92_IRQ_SPI
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},
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{
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"ohci", 0,
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AT91RM92_OHCI_BASE, AT91RM92_OHCI_SIZE,
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AT91RM92_IRQ_UHP
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},
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{ 0, 0, 0, 0, 0 }
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};
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static void
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at91_cpu_add_builtin_children(device_t dev, struct at91_softc *sc)
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{
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int i;
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struct cpu_devs *walker;
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// XXX should look at the device id in the DBGU register and
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// XXX based on the CPU load in these devices
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for (i = 0, walker = at91rm9200_devs; walker->name; i++, walker++) {
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at91_add_child(dev, i, walker->name, walker->unit,
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walker->mem_base, walker->mem_len, walker->irq0,
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walker->irq1, walker->irq2);
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}
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}
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#define NORMDEV 50
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static int
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at91_attach(device_t dev)
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{
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struct at91_softc *sc = device_get_softc(dev);
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int i;
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at91_softc = sc;
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sc->sc_st = &at91_bs_tag;
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sc->sc_sh = AT91RM92_BASE;
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sc->dev = dev;
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if (bus_space_subregion(sc->sc_st, sc->sc_sh, AT91RM92_SYS_BASE,
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AT91RM92_SYS_SIZE, &sc->sc_sys_sh) != 0)
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panic("Enable to map IRQ registers");
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sc->sc_irq_rman.rm_type = RMAN_ARRAY;
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sc->sc_irq_rman.rm_descr = "AT91 IRQs";
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sc->sc_mem_rman.rm_type = RMAN_ARRAY;
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sc->sc_mem_rman.rm_descr = "AT91 Memory";
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#if 0
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sc->sc_usbmem_rman.rm_type = RMAN_ARRAY;
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sc->sc_usbmem_rman.rm_descr = "AT91RM9200 USB Memory-mapped regs";
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#endif
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if (rman_init(&sc->sc_irq_rman) != 0 ||
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rman_manage_region(&sc->sc_irq_rman, 1, 31) != 0)
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panic("at91_attach: failed to set up IRQ rman");
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if (rman_init(&sc->sc_mem_rman) != 0 ||
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rman_manage_region(&sc->sc_mem_rman, 0xdff00000ul,
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0xdffffffful) != 0)
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panic("at91_attach: failed to set up memory rman");
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if (rman_manage_region(&sc->sc_mem_rman, AT91RM92_OHCI_BASE,
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AT91RM92_OHCI_BASE + AT91RM92_OHCI_SIZE - 1) != 0)
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panic("at91_attach: failed to set up ohci memory");
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for (i = 0; i < 32; i++) {
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bus_space_write_4(sc->sc_st, sc->sc_sys_sh, IC_SVR +
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i * 4, i);
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/* Priority. */
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/* XXX: Give better priorities to IRQs */
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bus_space_write_4(sc->sc_st, sc->sc_sys_sh, IC_SMR + i * 4,
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0);
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if (i < 8)
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bus_space_write_4(sc->sc_st, sc->sc_sys_sh, IC_EOICR,
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1);
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}
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bus_space_write_4(sc->sc_st, sc->sc_sys_sh, IC_SPU, 32);
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/* No debug. */
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bus_space_write_4(sc->sc_st, sc->sc_sys_sh, IC_DCR, 0);
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/* Disable and clear all interrupts. */
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bus_space_write_4(sc->sc_st, sc->sc_sys_sh, IC_IDCR, 0xffffffff);
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bus_space_write_4(sc->sc_st, sc->sc_sys_sh, IC_ICCR, 0xffffffff);
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/* XXX */
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/* Disable all interrupts for RTC (0xe24 == RTC_IDR) */
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bus_space_write_4(sc->sc_st, sc->sc_sys_sh, 0xe24, 0xffffffff);
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/* DIsable all interrupts for DBGU */
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bus_space_write_4(sc->sc_st, sc->sc_sys_sh, 0x20c, 0xffffffff);
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/* Disable all interrupts for the SDRAM controller */
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bus_space_write_4(sc->sc_st, sc->sc_sys_sh, 0xfa8, 0xffffffff);
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at91_cpu_add_builtin_children(dev, sc);
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bus_generic_probe(dev);
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bus_generic_attach(dev);
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enable_interrupts(I32_bit | F32_bit);
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return (0);
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}
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static struct resource *
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at91_alloc_resource(device_t dev, device_t child, int type, int *rid,
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u_long start, u_long end, u_long count, u_int flags)
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{
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struct at91_softc *sc = device_get_softc(dev);
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struct resource_list_entry *rle;
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struct at91_ivar *ivar = device_get_ivars(child);
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struct resource_list *rl = &ivar->resources;
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if (device_get_parent(child) != dev)
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return (BUS_ALLOC_RESOURCE(device_get_parent(dev), child,
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type, rid, start, end, count, flags));
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rle = resource_list_find(rl, type, *rid);
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if (rle == NULL)
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return (NULL);
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if (rle->res)
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panic("Resource rid %d type %d already in use", *rid, type);
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if (start == 0UL && end == ~0UL) {
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start = rle->start;
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count = ulmax(count, rle->count);
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end = ulmax(rle->end, start + count - 1);
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}
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switch (type)
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{
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case SYS_RES_IRQ:
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rle->res = rman_reserve_resource(&sc->sc_irq_rman,
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start, end, count, flags, child);
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break;
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case SYS_RES_MEMORY:
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#if 0
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if (start >= 0x00300000 && start <= 0x003fffff)
|
|
rle->res = rman_reserve_resource(&sc->sc_usbmem_rman,
|
|
start, end, count, flags, child);
|
|
else
|
|
#endif
|
|
rle->res = rman_reserve_resource(&sc->sc_mem_rman,
|
|
start, end, count, flags, child);
|
|
rman_set_bustag(rle->res, &at91_bs_tag);
|
|
rman_set_bushandle(rle->res, start);
|
|
break;
|
|
}
|
|
if (rle->res) {
|
|
rle->start = rman_get_start(rle->res);
|
|
rle->end = rman_get_end(rle->res);
|
|
rle->count = count;
|
|
rman_set_rid(rle->res, *rid);
|
|
}
|
|
return (rle->res);
|
|
}
|
|
|
|
static struct resource_list *
|
|
at91_get_resource_list(device_t dev, device_t child)
|
|
{
|
|
struct at91_ivar *ivar;
|
|
|
|
ivar = device_get_ivars(child);
|
|
return (&(ivar->resources));
|
|
}
|
|
|
|
static int
|
|
at91_release_resource(device_t dev, device_t child, int type,
|
|
int rid, struct resource *r)
|
|
{
|
|
struct resource_list *rl;
|
|
struct resource_list_entry *rle;
|
|
|
|
rl = at91_get_resource_list(dev, child);
|
|
if (rl == NULL)
|
|
return (EINVAL);
|
|
rle = resource_list_find(rl, type, rid);
|
|
if (rle == NULL)
|
|
return (EINVAL);
|
|
rman_release_resource(r);
|
|
rle->res = NULL;
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
at91_setup_intr(device_t dev, device_t child,
|
|
struct resource *ires, int flags, driver_intr_t *intr, void *arg,
|
|
void **cookiep)
|
|
{
|
|
struct at91_softc *sc = device_get_softc(dev);
|
|
|
|
if (rman_get_start(ires) == AT91RM92_IRQ_SYSTEM && !(flags & INTR_FAST))
|
|
panic("All system interrupt ISRs must be type INTR_FAST");
|
|
BUS_SETUP_INTR(device_get_parent(dev), child, ires, flags, intr, arg,
|
|
cookiep);
|
|
bus_space_write_4(sc->sc_st, sc->sc_sys_sh, IC_IECR,
|
|
1 << rman_get_start(ires));
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
at91_teardown_intr(device_t dev, device_t child, struct resource *res,
|
|
void *cookie)
|
|
{
|
|
struct at91_softc *sc = device_get_softc(dev);
|
|
|
|
bus_space_write_4(sc->sc_st, sc->sc_sys_sh, IC_IDCR,
|
|
1 << rman_get_start(res));
|
|
return (BUS_TEARDOWN_INTR(device_get_parent(dev), child, res, cookie));
|
|
}
|
|
|
|
static int
|
|
at91_activate_resource(device_t bus, device_t child, int type, int rid,
|
|
struct resource *r)
|
|
{
|
|
#if 0
|
|
u_long p;
|
|
int error;
|
|
|
|
if (type == SYS_RES_MEMORY) {
|
|
error = bus_space_map(rman_get_bustag(r),
|
|
rman_get_bushandle(r), rman_get_size(r), 0, &p);
|
|
if (error)
|
|
return (error);
|
|
rman_set_bushandle(r, p);
|
|
}
|
|
#endif
|
|
return (rman_activate_resource(r));
|
|
}
|
|
|
|
static int
|
|
at91_print_child(device_t dev, device_t child)
|
|
{
|
|
struct at91_ivar *ivars;
|
|
struct resource_list *rl;
|
|
int retval = 0;
|
|
|
|
ivars = device_get_ivars(child);
|
|
rl = &ivars->resources;
|
|
|
|
retval += bus_print_child_header(dev, child);
|
|
|
|
retval += resource_list_print_type(rl, "port", SYS_RES_IOPORT, "%#lx");
|
|
retval += resource_list_print_type(rl, "mem", SYS_RES_MEMORY, "%#lx");
|
|
retval += resource_list_print_type(rl, "irq", SYS_RES_IRQ, "%ld");
|
|
if (device_get_flags(dev))
|
|
retval += printf(" flags %#x", device_get_flags(dev));
|
|
|
|
retval += bus_print_child_footer(dev, child);
|
|
|
|
return (retval);
|
|
}
|
|
|
|
void
|
|
arm_mask_irq(uintptr_t nb)
|
|
{
|
|
|
|
bus_space_write_4(at91_softc->sc_st,
|
|
at91_softc->sc_sys_sh, IC_IDCR, 1 << nb);
|
|
|
|
}
|
|
|
|
int
|
|
arm_get_next_irq()
|
|
{
|
|
|
|
int status;
|
|
int irq;
|
|
|
|
irq = bus_space_read_4(at91_softc->sc_st,
|
|
at91_softc->sc_sys_sh, IC_IVR);
|
|
status = bus_space_read_4(at91_softc->sc_st,
|
|
at91_softc->sc_sys_sh, IC_ISR);
|
|
if (status == 0) {
|
|
bus_space_write_4(at91_softc->sc_st,
|
|
at91_softc->sc_sys_sh, IC_EOICR, 1);
|
|
return (-1);
|
|
}
|
|
return (irq);
|
|
}
|
|
|
|
void
|
|
arm_unmask_irq(uintptr_t nb)
|
|
{
|
|
|
|
bus_space_write_4(at91_softc->sc_st,
|
|
at91_softc->sc_sys_sh, IC_IECR, 1 << nb);
|
|
bus_space_write_4(at91_softc->sc_st, at91_softc->sc_sys_sh,
|
|
IC_EOICR, 0);
|
|
|
|
}
|
|
|
|
static device_method_t at91_methods[] = {
|
|
DEVMETHOD(device_probe, at91_probe),
|
|
DEVMETHOD(device_attach, at91_attach),
|
|
DEVMETHOD(device_identify, at91_identify),
|
|
|
|
DEVMETHOD(bus_alloc_resource, at91_alloc_resource),
|
|
DEVMETHOD(bus_setup_intr, at91_setup_intr),
|
|
DEVMETHOD(bus_teardown_intr, at91_teardown_intr),
|
|
DEVMETHOD(bus_activate_resource, at91_activate_resource),
|
|
DEVMETHOD(bus_deactivate_resource, bus_generic_deactivate_resource),
|
|
DEVMETHOD(bus_get_resource_list,at91_get_resource_list),
|
|
DEVMETHOD(bus_set_resource, bus_generic_rl_set_resource),
|
|
DEVMETHOD(bus_get_resource, bus_generic_rl_get_resource),
|
|
DEVMETHOD(bus_release_resource, at91_release_resource),
|
|
DEVMETHOD(bus_print_child, at91_print_child),
|
|
|
|
{0, 0},
|
|
};
|
|
|
|
static driver_t at91_driver = {
|
|
"atmelarm",
|
|
at91_methods,
|
|
sizeof(struct at91_softc),
|
|
};
|
|
static devclass_t at91_devclass;
|
|
|
|
DRIVER_MODULE(atmelarm, nexus, at91_driver, at91_devclass, 0, 0);
|