Support the PXA27x SD/SDIO/MMC controller on Zaurus

We use the suggested workaround for the problem E40 in the PXA27x errata
sheet. Unfortunately this limits the bus speed to 9.75Mhz.

1 files changed, 78 insertions, 0 deletions

diff --git a/sys/arch/zaurus/dev/scoop_mmc.c b/sys/arch/zaurus/dev/scoop_mmc.c
new file mode 100644
index 00000000000..18c4adfc987
--- /dev/null
+++ b/sys/arch/zaurus/dev/scoop_mmc.c
@@ -0,0 +1,78 @@
+/*	$OpenBSD: scoop_mmc.c,v 1.1 2007/03/18 20:53:10 uwe Exp $	*/
+
+/*
+ * Copyright (c) 2007 Uwe Stuehler <uwe@openbsd.org>
+ *
+ * Permission to use, copy, modify, and distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+ * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ */
+
+/* Attachment driver for pxammc(4) on Zaurus */
+
+#include <sys/param.h>
+#include <sys/device.h>
+#include <sys/systm.h>
+
+#include <dev/sdmmc/sdmmcreg.h>
+
+#include <arch/arm/xscale/pxammcvar.h>
+#include <arch/zaurus/dev/zaurus_scoopvar.h>
+
+int	scoop_mmc_match(struct device *, void *, void *);
+void	scoop_mmc_attach(struct device *, struct device *, void *);
+
+struct cfattach pxammc_scoop_ca = {
+	sizeof(struct pxammc_softc), scoop_mmc_match,
+	scoop_mmc_attach
+};
+
+u_int32_t scoop_mmc_get_ocr(void *);
+int	  scoop_mmc_set_power(void *, u_int32_t);
+
+int
+scoop_mmc_match(struct device *parent, void *match, void *aux)
+{
+	return pxammc_match();
+}
+
+void
+scoop_mmc_attach(struct device *parent, struct device *self, void *aux)
+{
+	struct pxammc_softc *sc = (struct pxammc_softc *)self;
+
+	sc->tag.cookie = (void *)sc;
+	sc->tag.get_ocr = scoop_mmc_get_ocr;
+	sc->tag.set_power = scoop_mmc_set_power;
+
+	pxammc_attach(sc, aux);
+}
+
+u_int32_t
+scoop_mmc_get_ocr(void *cookie)
+{
+	return MMC_OCR_3_2V_3_3V | MMC_OCR_3_3V_3_4V;
+}
+
+int
+scoop_mmc_set_power(void *cookie, u_int32_t ocr)
+{
+	if (ISSET(ocr, MMC_OCR_3_2V_3_3V | MMC_OCR_3_3V_3_4V)) {
+		scoop_set_sdmmc_power(1);
+		return 0;
+	} else if (ocr != 0) {
+		printf("scoop_mmc_set_power: unsupported OCR (%#x)\n", ocr);
+		return EINVAL;
+	} else {
+		scoop_set_sdmmc_power(0);
+		return 0;
+	}
+}