Return to obio.c CVS log

Up to [local] / funnyos / arch / testarm / dev

Annotation of funnyos/arch/testarm/dev/obio.c, Revision 1.11

1.1       init        1: /*
1.11    ! init        2:  * $Id: obio.c,v 1.10 2007/10/26 13:34:47 init Exp $
1.1       init        3:  */
                      4: #include <sys/types.h>
                      5: #include <sys/device.h>
                      6: #include <sys/mem.h>
                      7: #include <sys/bus.h>
1.2       init        8:
                      9: #include <arch/testarm/dev/obiovar.h>
1.1       init       10: #include <libkern/printf.h>
                     11:
1.10      init       12: /* #define OBIO_DEBUG */
                     13:
                     14: #ifdef OBIO_DEBUG
                     15: #define DPRINTF(x...)  do { printf(x); } while (0)
                     16: #else
                     17: #define DPRINTF(x...)  { }
                     18: #endif
                     19:
1.1       init       20: /*
                     21:  * testarm obio (on-board i/o) support.
                     22:  * This is a simple memory read/writes.
                     23:  */
1.6       init       24: int obio_attach(struct device *, uint32_t, uint8_t);
                     25:
                     26: uint8_t        obio_read_1(void *, uint32_t);
                     27: uint16_t       obio_read_2(void *, uint32_t);
                     28: uint32_t       obio_read_4(void *, uint32_t);
                     29: int            obio_write_1(void *, uint32_t, uint8_t);
                     30: int            obio_write_2(void *, uint32_t, uint16_t);
                     31: int            obio_write_4(void *, uint32_t, uint32_t);
1.1       init       32:
                     33:
1.3       init       34: struct driver obio_dr = {
1.5       init       35:        sizeof(struct obio_dd),
1.3       init       36:        obio_attach,
1.11    ! init       37:        NULL,
1.6       init       38:        NULL
1.3       init       39: };
                     40:
                     41:
1.1       init       42: int
1.3       init       43: obio_attach(struct device *self, uint32_t loc, uint8_t flags)
1.1       init       44: {
1.3       init       45:        struct obio_dd *ddp = self->dv_devdata;
1.6       init       46:        struct bus_handle *bhp = &ddp->od_bh;
1.4       init       47:
                     48:        ddp->od_locked = 0;
                     49:        ddp->od_ndevices = 0;
                     50:
1.3       init       51:        bhp->bus_read_1 = obio_read_1;
                     52:        bhp->bus_read_2 = obio_read_2;
                     53:        bhp->bus_read_4 = obio_read_4;
                     54:        bhp->bus_write_1 = obio_write_1;
                     55:        bhp->bus_write_2 = obio_write_2;
                     56:        bhp->bus_write_4 = obio_write_4;
1.9       init       57:        bhp->bh_ownerdd = self->dv_devdata;     /* XXX UGLY bus_{read|write} stuff will access bus device from bus_handle using this */
1.3       init       58:
1.4       init       59:        /* expose our bus_handle to the world */
                     60:        self->dv_aux = bhp;
1.1       init       61:
                     62:        printf("memory-mapped i/o\n");
                     63:
                     64:        return(0);
                     65: }
                     66:
                     67:
                     68: uint8_t
1.6       init       69: obio_read_1(void *ddp, uint32_t addr)
1.1       init       70: {
                     71:        /*
                     72:         * There is only one on-board i/o bus in testarm.
                     73:         */
1.10      init       74:        DPRINTF("obio_read_1: read @0x%x\n", addr);
1.1       init       75:        return( (*(uint8_t *)addr) );
                     76: }
                     77:
                     78:
                     79: uint16_t
1.6       init       80: obio_read_2(void *ddp, uint32_t addr)
1.1       init       81: {
1.10      init       82:        DPRINTF("obio_read_2: read @0x%x\n", addr);
1.1       init       83:        return( (*(uint16_t *)addr) );
                     84: }
                     85:
                     86:
                     87: uint32_t
1.6       init       88: obio_read_4(void *ddp, uint32_t addr)
1.1       init       89: {
1.10      init       90:        DPRINTF("obio_read_4: read @0x%x\n", addr);
1.1       init       91:        return( (*(uint32_t *)addr) );
                     92: }
                     93:
                     94:
                     95: int
1.6       init       96: obio_write_1(void *ddp, uint32_t addr, uint8_t data)
1.1       init       97: {
1.10      init       98:        DPRINTF("obio_write_1: write @0x%x data %d\n", addr, data);
                     99:
1.1       init      100:        *((uint8_t *)addr) = data;
                    101:
                    102:        /* XXX what about write errors? */
                    103:        return(0);
                    104: }
                    105:
                    106:
                    107: int
1.6       init      108: obio_write_2(void *ddp, uint32_t addr, uint16_t data)
1.1       init      109: {
1.10      init      110:        DPRINTF("obio_write_2: write @0x%x data %d\n", addr, data);
                    111:
1.1       init      112:        *((uint16_t *)addr) = data;
                    113:
                    114:        return(0);
                    115: }
                    116:
                    117:
                    118: int
1.6       init      119: obio_write_4(void *ddp, uint32_t addr, uint32_t data)
1.1       init      120: {
1.10      init      121:        DPRINTF("obio_write_4: write @0x%x data %d\n", addr, data);
                    122:
1.1       init      123:        *((uint32_t *)addr) = data;
                    124:
                    125:        return(0);
                    126: }
                    127: