[src/trunk]: src/sys/arch/sparc64/dev - map registers ourselves, no more schi...

[macallan <macallan%NetBSD.org@localhost>]

details:   https://anonhg.NetBSD.org/src/rev/d4766f78f054
branches:  trunk
changeset: 994210:d4766f78f054
user:      macallan <macallan%NetBSD.org@localhost>
date:      Fri Oct 26 01:57:59 2018 +0000

description:
- map registers ourselves, no more schizo hackery
- remove some leftover debug code
- print address when attaching
- actually lock/unlock in acquire_bus()/release_bus()
should be ready for general consumption now

diffstat:

 sys/arch/sparc64/dev/jbus-i2c.c |  72 +++++++++++++++++++++++++---------------
 1 files changed, 44 insertions(+), 28 deletions(-)

diffs (175 lines):

diff -r 084c8399acf1 -r d4766f78f054 sys/arch/sparc64/dev/jbus-i2c.c
--- a/sys/arch/sparc64/dev/jbus-i2c.c   Fri Oct 26 01:33:33 2018 +0000
+++ b/sys/arch/sparc64/dev/jbus-i2c.c   Fri Oct 26 01:57:59 2018 +0000
@@ -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 @@
 #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 @@
        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 @@
 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 @@
        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 @@
        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 @@
        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 @@
            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