@@ -1,4 +1,4 @@
-/* $NetBSD: voodoofb.c,v 1.30 2012/01/17 07:48:48 macallan Exp $ */
+/* $NetBSD: voodoofb.c,v 1.31 2012/01/17 19:13:22 macallan Exp $ */
/*
* Copyright (c) 2005, 2006 Michael Lorenz
@@ -32,7 +32,7 @@
*/
#include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: voodoofb.c,v 1.30 2012/01/17 07:48:48 macallan Exp $");
+__KERNEL_RCSID(0, "$NetBSD: voodoofb.c,v 1.31 2012/01/17 19:13:22 macallan Exp $");
#include <sys/param.h>
#include <sys/systm.h>
@@ -42,8 +42,6 @@
#include <sys/callout.h>
#include <sys/kauth.h>
-#include <dev/videomode/videomode.h>
-
#include <dev/pci/pcivar.h>
#include <dev/pci/pcireg.h>
#include <dev/pci/pcidevs.h>
@@ -57,6 +55,13 @@
#include <dev/wscons/wsdisplay_vconsvar.h>
#include <dev/pci/wsdisplay_pci.h>
+#include <dev/i2c/i2cvar.h>
+#include <dev/i2c/i2c_bitbang.h>
+#include <dev/i2c/ddcvar.h>
+#include <dev/videomode/videomode.h>
+#include <dev/videomode/edidvar.h>
+#include <dev/videomode/edidreg.h>
+
#include "opt_wsemul.h"
struct voodoofb_softc {
@@ -87,6 +92,12 @@
int width, height, linebytes;
const struct videomode *sc_videomode;
+ /* i2c stuff */
+ struct i2c_controller sc_i2c;
+ uint8_t sc_edid_data[128];
+ struct edid_info sc_edid_info;
+ uint32_t sc_i2creg;
+
int sc_mode;
uint32_t sc_bg;
@@ -198,6 +209,34 @@
NULL, /* scroll */
};
+/* I2C glue */
+static int voodoofb_i2c_acquire_bus(void *, int);
+static void voodoofb_i2c_release_bus(void *, int);
+static int voodoofb_i2c_send_start(void *, int);
+static int voodoofb_i2c_send_stop(void *, int);
+static int voodoofb_i2c_initiate_xfer(void *, i2c_addr_t, int);
+static int voodoofb_i2c_read_byte(void *, uint8_t *, int);
+static int voodoofb_i2c_write_byte(void *, uint8_t, int);
+
+/* I2C bitbang glue */
+static void voodoofb_i2cbb_set_bits(void *, uint32_t);
+static void voodoofb_i2cbb_set_dir(void *, uint32_t);
+static uint32_t voodoofb_i2cbb_read(void *);
+
+static void voodoofb_setup_i2c(struct voodoofb_softc *);
+
+static const struct i2c_bitbang_ops voodoofb_i2cbb_ops = {
+ voodoofb_i2cbb_set_bits,
+ voodoofb_i2cbb_set_dir,
+ voodoofb_i2cbb_read,
+ {
+ VSP_SDA0_IN,
+ VSP_SCL0_IN,
+ 0,
+ 0
+ }
+};
+
/*
* Inline functions for getting access to register aperture.
*/
@@ -369,10 +408,16 @@
printf("%s: initial resolution %dx%d, %d bit\n", device_xname(self),
sc->width, sc->height, sc->bits_per_pixel);
+ sc->sc_videomode = NULL;
+ voodoofb_setup_i2c(sc);
+
/* XXX this should at least be configurable via kernel config */
- if ((sc->sc_videomode = pick_mode_by_ref(1024, 768, 60)) != NULL)
- voodoofb_set_videomode(sc, sc->sc_videomode);
+ if (sc->sc_videomode == NULL) {
+ sc->sc_videomode = pick_mode_by_ref(width, height, 60);
+ }
+ voodoofb_set_videomode(sc, sc->sc_videomode);
+
vcons_init(&sc->vd, sc, &voodoofb_defaultscreen, &voodoofb_accessops);
sc->vd.init_screen = voodoofb_init_screen;
@@ -1411,4 +1456,141 @@
voodoo3_write32(sc, SRCXY, 0);
voodoofb_wait_idle(sc);
+}
+
+static void
+voodoofb_setup_i2c(struct voodoofb_softc *sc)
+{
+ int i;
+
+ /* Fill in the i2c tag */
+ sc->sc_i2c.ic_cookie = sc;
+ sc->sc_i2c.ic_acquire_bus = voodoofb_i2c_acquire_bus;
+ sc->sc_i2c.ic_release_bus = voodoofb_i2c_release_bus;
+ sc->sc_i2c.ic_send_start = voodoofb_i2c_send_start;
+ sc->sc_i2c.ic_send_stop = voodoofb_i2c_send_stop;
+ sc->sc_i2c.ic_initiate_xfer = voodoofb_i2c_initiate_xfer;
+ sc->sc_i2c.ic_read_byte = voodoofb_i2c_read_byte;
+ sc->sc_i2c.ic_write_byte = voodoofb_i2c_write_byte;
+ sc->sc_i2c.ic_exec = NULL;
+
+ sc->sc_i2creg = voodoo3_read32(sc, VIDSERPARPORT);
+#ifdef VOODOOFB_DEBUG
+ printf("data: %08x\n", sc->sc_i2creg);
+#endif
+ sc->sc_i2creg |= VSP_ENABLE_IIC0;
+ sc->sc_i2creg &= ~(VSP_SDA0_OUT | VSP_SCL0_OUT);
+ voodoo3_write32(sc, VIDSERPARPORT, sc->sc_i2creg);
+
+ /* zero out the EDID buffer */
+ memset(sc->sc_edid_data, 0, 128);
+
+ /* Some monitors don't respond first time */
+ i = 0;
+ while (sc->sc_edid_data[1] == 0 && i++ < 3)
+ ddc_read_edid(&sc->sc_i2c, sc->sc_edid_data, 128);
+ if (i < 3) {
+ if (edid_parse(sc->sc_edid_data, &sc->sc_edid_info) != -1) {
+#ifdef VOODOOFB_DEBUG
+ edid_print(&sc->sc_edid_info);
+#endif
+ /*
+ * Now pick a mode.
+ * How do we know our max. pixel clock?
+ * All Voodoo3 should support at least 250MHz.
+ * All Voodoo3 I've seen so far have at least 8MB
+ * which we're not going to exhaust either in 8bit.
+ */
+ if ((sc->sc_edid_info.edid_preferred_mode != NULL)) {
+ sc->sc_videomode =
+ sc->sc_edid_info.edid_preferred_mode;
+ } else {
+ int n;
+ struct videomode *m = sc->sc_edid_info.edid_modes;
+
+ sort_modes(sc->sc_edid_info.edid_modes,
+ &sc->sc_edid_info.edid_preferred_mode,
+ sc->sc_edid_info.edid_nmodes);
+ while ((sc->sc_videomode == NULL) &&
+ (n < sc->sc_edid_info.edid_nmodes)) {
+ if (m[n].dot_clock <= 250000) {
+ sc->sc_videomode = &m[n];
+ }
+ }
+ }
+ }
+ }
+}
+
+/* I2C bitbanging */
+static void voodoofb_i2cbb_set_bits(void *cookie, uint32_t bits)
+{
+ struct voodoofb_softc *sc = cookie;
+ uint32_t out;
+
+ out = bits >> 2; /* bitmasks match the IN bits */
+
+ voodoo3_write32(sc, VIDSERPARPORT, sc->sc_i2creg | out);
+}
+
+static void voodoofb_i2cbb_set_dir(void *cookie, uint32_t dir)
+{
+ /* Nothing to do */
+}
+
+static uint32_t voodoofb_i2cbb_read(void *cookie)
+{
+ struct voodoofb_softc *sc = cookie;
+ uint32_t bits;
+
+ bits = voodoo3_read32(sc, VIDSERPARPORT);
+
+ return bits;
+}
+
+/* higher level I2C stuff */
+static int
+voodoofb_i2c_acquire_bus(void *cookie, int flags)
+{
+ /* private bus */
+ return (0);
+}
+
+static void
+voodoofb_i2c_release_bus(void *cookie, int flags)
+{
+ /* private bus */
+}
+
+static int
+voodoofb_i2c_send_start(void *cookie, int flags)
+{
+ return (i2c_bitbang_send_start(cookie, flags, &voodoofb_i2cbb_ops));
+}
+
+static int
+voodoofb_i2c_send_stop(void *cookie, int flags)
+{
+
+ return (i2c_bitbang_send_stop(cookie, flags, &voodoofb_i2cbb_ops));
+}
+
+static int
+voodoofb_i2c_initiate_xfer(void *cookie, i2c_addr_t addr, int flags)
+{
+
+ return (i2c_bitbang_initiate_xfer(cookie, addr, flags,
+ &voodoofb_i2cbb_ops));
+}
+
+static int
+voodoofb_i2c_read_byte(void *cookie, uint8_t *valp, int flags)
+{
+ return (i2c_bitbang_read_byte(cookie, valp, flags, &voodoofb_i2cbb_ops));
+}
+
+static int
+voodoofb_i2c_write_byte(void *cookie, uint8_t val, int flags)
+{
+ return (i2c_bitbang_write_byte(cookie, val, flags, &voodoofb_i2cbb_ops));
}