parallel.c: Consoldiate parallel master registration logic

This is analogous to spi.c and opaque.c however parallel
logic was previously never consoldiated.

This free's up flashrom.c from namespace pollution.

BUG=b:242246291
TEST=builds with both make and meson.

Change-Id: Ie08e2e6c51ccef5281386bf7e3df439b91573974
Signed-off-by: Edward O'Callaghan <quasisec@google.com>
Reviewed-on: https://review.coreboot.org/c/flashrom/+/66651
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Thomas Heijligen <src@posteo.de>

parallel.c

@@ -0,0 +1,93 @@
+/*
+ * This file is part of the flashrom project.
+ *
+ * Copyright (C) 2000 Silicon Integrated System Corporation
+ * Copyright (C) 2004 Tyan Corp <yhlu@tyan.com>
+ * Copyright (C) 2005-2008 coresystems GmbH
+ * Copyright (C) 2008,2009 Carl-Daniel Hailfinger
+ * Copyright (C) 2016 secunet Security Networks AG
+ * (Written by Nico Huber <nico.huber@secunet.com> for secunet)
+ * Copyright (C) 2009,2010,2011 Carl-Daniel Hailfinger
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; version 2 of the License.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ */
+
+#include "flash.h"
+#include "programmer.h"
+
+void chip_writeb(const struct flashctx *flash, uint8_t val, chipaddr addr)
+{
+	flash->mst->par.chip_writeb(flash, val, addr);
+}
+
+void chip_writew(const struct flashctx *flash, uint16_t val, chipaddr addr)
+{
+	flash->mst->par.chip_writew(flash, val, addr);
+}
+
+void chip_writel(const struct flashctx *flash, uint32_t val, chipaddr addr)
+{
+	flash->mst->par.chip_writel(flash, val, addr);
+}
+
+void chip_writen(const struct flashctx *flash, const uint8_t *buf, chipaddr addr, size_t len)
+{
+	flash->mst->par.chip_writen(flash, buf, addr, len);
+}
+
+uint8_t chip_readb(const struct flashctx *flash, const chipaddr addr)
+{
+	return flash->mst->par.chip_readb(flash, addr);
+}
+
+uint16_t chip_readw(const struct flashctx *flash, const chipaddr addr)
+{
+	return flash->mst->par.chip_readw(flash, addr);
+}
+
+uint32_t chip_readl(const struct flashctx *flash, const chipaddr addr)
+{
+	return flash->mst->par.chip_readl(flash, addr);
+}
+
+void chip_readn(const struct flashctx *flash, uint8_t *buf, chipaddr addr,
+		size_t len)
+{
+	flash->mst->par.chip_readn(flash, buf, addr, len);
+}
+
+int register_par_master(const struct par_master *mst,
+			    const enum chipbustype buses,
+			    void *data)
+{
+	struct registered_master rmst = {0};
+
+	if (mst->shutdown) {
+		if (register_shutdown(mst->shutdown, data)) {
+			mst->shutdown(data); /* cleanup */
+			return 1;
+		}
+	}
+
+	if (!mst->chip_writeb || !mst->chip_writew || !mst->chip_writel ||
+	    !mst->chip_writen || !mst->chip_readb || !mst->chip_readw ||
+	    !mst->chip_readl || !mst->chip_readn) {
+		msg_perr("%s called with incomplete master definition. "
+			 "Please report a bug at flashrom@flashrom.org\n",
+			 __func__);
+		return ERROR_FLASHROM_BUG;
+	}
+
+	rmst.buses_supported = buses;
+	rmst.par = *mst;
+	if (data)
+		rmst.par.data = data;
+	return register_master(&rmst);
+}