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Annotation of funnyos/arch/testarm/dev/obio.c, Revision 1.2

1.1       init        1: /*
1.2     ! init        2:  * $Id: obio.c,v 1.1.1.1 2007/10/16 08:41:04 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:
                     12: /*
                     13:  * testarm obio (on-board i/o) support.
                     14:  * This is a simple memory read/writes.
                     15:  */
                     16: uint8_t        obio_read_1(struct device *, uint32_t);
                     17: uint16_t       obio_read_2(struct device *, uint32_t);
                     18: uint32_t       obio_read_4(struct device *, uint32_t);
                     19: int            obio_write_1(struct device *, uint32_t, uint8_t);
                     20: int            obio_write_2(struct device *, uint32_t, uint16_t);
                     21: int            obio_write_4(struct device *, uint32_t, uint32_t);
                     22:
                     23:
                     24: int
                     25: obio_attach(struct device *self)
                     26: {
                     27:        struct busops *aux = self->dv_aux;
                     28:        aux = (struct busops *)kmalloc(sizeof(struct busops));
                     29:        /*
                     30:         * Link bus ops.
                     31:         */
                     32:        aux->bus_read_1 = obio_read_1;
                     33:        aux->bus_read_2 = obio_read_2;
                     34:        aux->bus_read_4 = obio_read_4;
                     35:        aux->bus_write_1 = obio_write_1;
                     36:        aux->bus_write_2 = obio_write_2;
                     37:        aux->bus_write_4 = obio_write_4;
                     38:
                     39:        printf("memory-mapped i/o\n");
                     40:
                     41:        return(0);
                     42: }
                     43:
                     44:
                     45: uint8_t
                     46: obio_read_1(struct device *devp, uint32_t addr)
                     47: {
                     48:        /*
                     49:         * struct device is not used in obio.
                     50:         * There is only one on-board i/o bus in testarm.
                     51:         */
                     52:        return( (*(uint8_t *)addr) );
                     53: }
                     54:
                     55:
                     56: uint16_t
                     57: obio_read_2(struct device *devp, uint32_t addr)
                     58: {
                     59:        return( (*(uint16_t *)addr) );
                     60: }
                     61:
                     62:
                     63: uint32_t
                     64: obio_read_4(struct device *devp, uint32_t addr)
                     65: {
                     66:        return( (*(uint32_t *)addr) );
                     67: }
                     68:
                     69:
                     70: int
                     71: obio_write_1(struct device *devp, uint32_t addr, uint8_t data)
                     72: {
                     73:        *((uint8_t *)addr) = data;
                     74:
                     75:        /* XXX what about write errors? */
                     76:        return(0);
                     77: }
                     78:
                     79:
                     80: int
                     81: obio_write_2(struct device *devp, uint32_t addr, uint16_t data)
                     82: {
                     83:        *((uint16_t *)addr) = data;
                     84:
                     85:        return(0);
                     86: }
                     87:
                     88:
                     89: int
                     90: obio_write_4(struct device *devp, uint32_t addr, uint32_t data)
                     91: {
                     92:        *((uint32_t *)addr) = data;
                     93:
                     94:        return(0);
                     95: }
                     96: