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- map registers ourselves, no more schizo hackery

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- remove some leftover debug code
- print address when attaching
- actually lock/unlock in acquire_bus()/release_bus()
should be ready for general consumption now
This commit is contained in:
macallan 2018-10-26 01:57:59 +00:00
parent b6b4afa4da
commit 0f10d4ce0d
1 changed files with 44 additions and 28 deletions
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72
sys/arch/sparc64/dev/jbus-i2c.c
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@ -1,4 +1,4 @@
/* $NetBSD: jbus-i2c.c,v 1.1 2018/10/20 06:25:46 macallan Exp $ */
/* $NetBSD: jbus-i2c.c,v 1.2 2018/10/26 01:57:59 macallan Exp $ */
/*
* Copyright (c) 2018 Michael Lorenz
@ -27,7 +27,7 @@
*/
#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: jbus-i2c.c,v 1.1 2018/10/20 06:25:46 macallan Exp $");
__KERNEL_RCSID(0, "$NetBSD: jbus-i2c.c,v 1.2 2018/10/26 01:57:59 macallan Exp $");
#include <sys/param.h>
#include <sys/device.h>
@ -39,15 +39,13 @@ __KERNEL_RCSID(0, "$NetBSD: jbus-i2c.c,v 1.1 2018/10/20 06:25:46 macallan Exp $"
#include <dev/i2c/i2cvar.h>
#include <dev/i2c/i2c_bitbang.h>
#include <dev/pci/pcivar.h>
#include <dev/pci/pcireg.h>
#include <sparc64/dev/iommureg.h>
#include <sparc64/dev/iommuvar.h>
#include <sparc64/dev/schizovar.h>
#include <sparc64/dev/schizoreg.h>
#include <machine/openfirm.h>
#ifdef JBUSI2C_DEBUG
#define DPRINTF printf
#else
#define DPRINTF if (0) printf
#endif
/* I2C glue */
static int jbusi2c_i2c_acquire_bus(void *, int);
@ -82,6 +80,8 @@ struct jbusi2c_softc {
device_t sc_dev;
struct i2c_controller sc_i2c;
kmutex_t sc_i2c_lock;
bus_space_tag_t sc_bustag;
bus_space_handle_t sc_regh;
int sc_node;
};
@ -90,7 +90,9 @@ static void jbusi2c_setup_i2c(struct jbusi2c_softc *);
CFATTACH_DECL_NEW(jbusi2c, sizeof(struct jbusi2c_softc),
jbusi2c_match, jbusi2c_attach, NULL, NULL);
extern struct schizo_softc *schizo0;
/* schizo GPIO registers */
#define DATA 0
#define DIR 8
int
jbusi2c_match(device_t parent, cfdata_t match, void *aux)
@ -114,13 +116,19 @@ jbusi2c_attach(device_t parent, device_t self, void *aux)
struct jbusi2c_softc *sc = device_private(self);
struct mainbus_attach_args *ma = aux;
aprint_normal("\n");
aprint_normal(": addr %lx\n", ma->ma_reg[0].ur_paddr);
sc->sc_dev = self;
sc->sc_node = ma->ma_node;
sc->sc_bustag = ma->ma_bustag;
if (schizo0 != NULL)
jbusi2c_setup_i2c(sc);
if (bus_space_map(sc->sc_bustag, ma->ma_reg[0].ur_paddr, 16, 0,
&sc->sc_regh)) {
aprint_error(": failed to map registers\n");
return;
}
jbusi2c_setup_i2c(sc);
}
@ -133,11 +141,10 @@ jbusi2c_setup_i2c(struct jbusi2c_softc *sc)
prop_dictionary_t dev;
prop_data_t data;
prop_dictionary_t dict = device_properties(sc->sc_dev);
int ret, devs, regs[2], addr;
uint8_t reg = 0, val[128];
int devs, regs[2], addr;
char name[64], compat[256];
sc->sc_i2c.ic_cookie = schizo0;
sc->sc_i2c.ic_cookie = sc;
sc->sc_i2c.ic_acquire_bus = jbusi2c_i2c_acquire_bus;
sc->sc_i2c.ic_release_bus = jbusi2c_i2c_release_bus;
sc->sc_i2c.ic_send_start = jbusi2c_i2c_send_start;
@ -147,11 +154,6 @@ jbusi2c_setup_i2c(struct jbusi2c_softc *sc)
sc->sc_i2c.ic_write_byte = jbusi2c_i2c_write_byte;
sc->sc_i2c.ic_exec = NULL;
val[0] = 0;
ret = iic_exec(&sc->sc_i2c, I2C_OP_READ_WITH_STOP, 0x50,
&reg, 1, val, 1, I2C_F_POLL);
printf("ret %d val %02x\n", ret, val[0]);
/* round up i2c devices */
devs = OF_child(sc->sc_node);
cfg = prop_array_create();
@ -188,45 +190,59 @@ jbusi2c_setup_i2c(struct jbusi2c_softc *sc)
iicbus_print);
}
static inline void
jbusi2c_write(struct jbusi2c_softc *sc, int reg, uint64_t bits)
{
bus_space_write_8(sc->sc_bustag, sc->sc_regh, reg, bits);
}
static inline uint64_t
jbusi2c_read(struct jbusi2c_softc *sc, int reg)
{
return bus_space_read_8(sc->sc_bustag, sc->sc_regh, reg);
}
/* I2C bitbanging */
static void
jbusi2c_i2cbb_set_bits(void *cookie, uint32_t bits)
{
struct schizo_softc *sc = cookie;
struct jbusi2c_softc *sc = cookie;
schizo_write(sc, SCZ_JBUS_GPIO_DATA, bits);
jbusi2c_write(sc, DATA, bits);
}
static void
jbusi2c_i2cbb_set_dir(void *cookie, uint32_t dir)
{
struct schizo_softc *sc = cookie;
struct jbusi2c_softc *sc = cookie;
schizo_write(sc, SCZ_JBUS_GPIO_DIR, dir);
jbusi2c_write(sc, DIR, dir);
}
static uint32_t
jbusi2c_i2cbb_read(void *cookie)
{
struct schizo_softc *sc = cookie;
struct jbusi2c_softc *sc = cookie;
return schizo_read(sc, SCZ_JBUS_GPIO_DATA);
return jbusi2c_read(sc, DATA);
}
/* higher level I2C stuff */
static int
jbusi2c_i2c_acquire_bus(void *cookie, int flags)
{
struct jbusi2c_softc *sc = cookie;
/* private bus */
mutex_enter(&sc->sc_i2c_lock);
return 0;
}
static void
jbusi2c_i2c_release_bus(void *cookie, int flags)
{
struct jbusi2c_softc *sc = cookie;
/* private bus */
mutex_exit(&sc->sc_i2c_lock);
}
static int