mail archive of the barebox mailing list
 help / color / mirror / Atom feed
From: Ahmad Fatoum <a.fatoum@pengutronix.de>
To: barebox@lists.infradead.org
Cc: Ahmad Fatoum <a.fatoum@pengutronix.de>
Subject: [PATCH 18/28] ARM: at91: add code for sama5 boot source detection
Date: Wed,  1 Jul 2020 07:23:30 +0200	[thread overview]
Message-ID: <20200701052340.9462-19-a.fatoum@pengutronix.de> (raw)
In-Reply-To: <20200701052340.9462-1-a.fatoum@pengutronix.de>

SAMA5 BootROM passes information about the boot source in the r4
register. Add functions to parse these. To make use of this, entry point
must back up the r4 register, because otherwise it's clobbered by local
variable use.

Signed-off-by: Ahmad Fatoum <a.fatoum@pengutronix.de>
---
 .../mach-at91/include/mach/sama5_bootsource.h | 46 +++++++++++++++++++
 1 file changed, 46 insertions(+)
 create mode 100644 arch/arm/mach-at91/include/mach/sama5_bootsource.h

diff --git a/arch/arm/mach-at91/include/mach/sama5_bootsource.h b/arch/arm/mach-at91/include/mach/sama5_bootsource.h
new file mode 100644
index 000000000000..29354dcaf34d
--- /dev/null
+++ b/arch/arm/mach-at91/include/mach/sama5_bootsource.h
@@ -0,0 +1,46 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#ifndef AT91_SAMA5_BOOTSOURCE_H_
+#define AT91_SAMA5_BOOTSOURCE_H_
+
+#include <errno.h>
+#include <bootsource.h>
+#include <linux/bitops.h>
+#include <linux/bitfield.h>
+#include <mach/hardware.h>
+
+/* Boot modes stored by BootROM in r4 */
+#define SAMA5_BOOTSOURCE_SPI	0
+#define SAMA5_BOOTSOURCE_MCI	1
+#define SAMA5_BOOTSOURCE_SMC	2
+#define SAMA5_BOOTSOURCE_TWI	3
+#define SAMA5_BOOTSOURCE_QSPI	4
+#define SAMA5_BOOTSOURCE_SAM_BA	7
+
+#define SAMA5_BOOTSOURCE		GENMASK(3, 0)
+#define SAMA5_BOOTSOURCE_INSTANCE	GENMASK(7, 4)
+
+static inline int sama5_bootsource(u32 reg)
+{
+	u32 dev = FIELD_GET(SAMA5_BOOTSOURCE, reg);
+
+	switch(dev) {
+	case SAMA5_BOOTSOURCE_MCI:
+		return BOOTSOURCE_MMC;
+	case SAMA5_BOOTSOURCE_SPI:
+		return BOOTSOURCE_SPI_NOR;
+	case SAMA5_BOOTSOURCE_QSPI:
+		return BOOTSOURCE_SPI;
+	case SAMA5_BOOTSOURCE_SMC:
+		return BOOTSOURCE_NAND;
+	case SAMA5_BOOTSOURCE_SAM_BA:
+		return BOOTSOURCE_SERIAL;
+	}
+	return BOOTSOURCE_UNKNOWN;
+}
+
+static inline int sama5_bootsource_instance(u32 reg)
+{
+	return FIELD_GET(SAMA5_BOOTSOURCE_INSTANCE, reg);
+}
+
+#endif
-- 
2.27.0


_______________________________________________
barebox mailing list
barebox@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/barebox

  parent reply	other threads:[~2020-07-01  5:23 UTC|newest]

Thread overview: 30+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-07-01  5:23 [PATCH 00/28] ARM: at91: add sama5d2 first stage support Ahmad Fatoum
2020-07-01  5:23 ` [PATCH 01/28] ARM: at91: remove <mach/hardware.h> include from assembly code Ahmad Fatoum
2020-07-01  5:23 ` [PATCH 02/28] ARM: at91: sama5d2: cast peripheral base addresses to __iomem pointers Ahmad Fatoum
2020-07-01  5:23 ` [PATCH 03/28] ARM: at91: import at91bootstrap's at91_ddrsdrc.h Ahmad Fatoum
2020-07-01  5:23 ` [PATCH 04/28] ARM: at91: migrate at91sam9_ddrsdr.h to use " Ahmad Fatoum
2020-07-01  5:23 ` [PATCH 05/28] ARM: at91: replace at91sam9_ddrsdr.h with " Ahmad Fatoum
2020-07-01  5:23 ` [PATCH 06/28] ARM: at91: import early_udelay from at91bootstrap Ahmad Fatoum
2020-07-01  5:23 ` [PATCH 07/28] ARM: at91: import low level DDRAMC initialization code " Ahmad Fatoum
2020-07-01  5:23 ` [PATCH 08/28] ARM: at91: watchdog: implement at91_wdt_disable Ahmad Fatoum
2020-07-01  5:23 ` [PATCH 09/28] watchdog: add support for at91sam9/sama5 watchdog Ahmad Fatoum
2020-07-01  5:23 ` [PATCH 10/28] ARM: at91: implement sama5d2 lowlevel init Ahmad Fatoum
2020-07-01  5:23 ` [PATCH 11/28] ARM: at91: sama5d2: add sama5d2 matrix configuration Ahmad Fatoum
2020-07-01  5:23 ` [PATCH 12/28] ARM: at91: add sama5d2 cache init Ahmad Fatoum
2020-07-01  5:23 ` [PATCH 13/28] ARM: at91: add necessary Advanced Interrupt Controller configuration Ahmad Fatoum
2020-07-01  5:23 ` [PATCH 14/28] ARM: at91: extend low level PMC driver for generic clk support Ahmad Fatoum
2020-07-01  5:23 ` [PATCH 15/28] pbl: add block I/O API Ahmad Fatoum
2020-07-01  5:23 ` [PATCH 16/28] fs: fat: extend for in-PBL support Ahmad Fatoum
2020-07-01  5:23 ` [PATCH 17/28] mci: extend atmel-sdhci driver to first stage use Ahmad Fatoum
2020-07-01  5:23 ` Ahmad Fatoum [this message]
2020-07-01  5:23 ` [PATCH 19/28] ARM: at91: add helpers for chain-loading barebox from SD-card Ahmad Fatoum
2020-07-01  5:23 ` [PATCH 20/28] ARM: at91: sama5d2: reuse stack set-up by first stage Ahmad Fatoum
2020-07-01  5:23 ` [PATCH 21/28] at91: debug_ll: remove duplicated IS_ENABLED(CONFIG_DEBUG_LL) condition Ahmad Fatoum
2020-07-01  5:23 ` [PATCH 22/28] ARM: at91: sama5d2: reduce UART setup boilerplate with new helpers Ahmad Fatoum
2020-07-01  5:23 ` [PATCH 23/28] ARM: at91: sama5d27-som1: add additional first stage entry point Ahmad Fatoum
2020-07-01  5:23 ` [PATCH 24/28] ARM: at91: sama5d2: read back memory size from DDRAM controller Ahmad Fatoum
2020-07-01  5:23 ` [PATCH 25/28] ARM: at91: sama5d2: populate $bootsource and $bootsource_instance Ahmad Fatoum
2020-07-01  5:23 ` [PATCH 26/28] ARM: at91: sama5d27-som1-ek: add barebox_update and multi environment support Ahmad Fatoum
2020-07-01  5:23 ` [PATCH 27/28] ARM: at91: sama5d27-giantboard: add additional first stage entry point Ahmad Fatoum
2020-07-01  5:23 ` [PATCH 28/28] ARM: at91: sama5d27-giantboard: add default environment/bbu Ahmad Fatoum
2020-07-01  9:10 [PATCH RESEND 00/28] ARM: at91: add sama5d2 first stage support Ahmad Fatoum
2020-07-01  9:11 ` [PATCH 18/28] ARM: at91: add code for sama5 boot source detection Ahmad Fatoum

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=20200701052340.9462-19-a.fatoum@pengutronix.de \
    --to=a.fatoum@pengutronix.de \
    --cc=barebox@lists.infradead.org \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line before the message body. 
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox