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Message-ID: <20070805231910.GB13927@hall.aurel32.net>
Date: Mon, 6 Aug 2007 01:19:10 +0200
From: Aurelien Jarno <aurelien@...el32.net>
To: Michael Buesch <mb@...sch.de>, netdev@...r.kernel.org
Cc: Felix Fietkau <nbd@...nwrt.org>
Subject: [PATCH 1/4][SSB] EXTIF timing initialization
The patch below against 2.6.23-rc1-mm2 implements EXTIF timing
initialization, currently marked as TODO.
It originally comes from the OpenWrt patches.
Cc: Felix Fietkau <nbd@...nwrt.org>
Signed-off-by: Aurelien Jarno <aurelien@...el32.net>
--- a/drivers/ssb/driver_mipscore.c
+++ b/drivers/ssb/driver_mipscore.c
@@ -4,6 +4,7 @@
*
* Copyright 2005, Broadcom Corporation
* Copyright 2006, 2007, Michael Buesch <mb@...sch.de>
+ * Copyright 2006, 2007, Felix Fietkau <nbd@...nwrt.org>
*
* Licensed under the GNU/GPL. See COPYING for details.
*/
@@ -31,6 +32,16 @@
ssb_write32(mcore->dev, offset, value);
}
+static inline u32 extif_read32(struct ssb_extif *extif, u16 offset)
+{
+ return ssb_read32(extif->dev, offset);
+}
+
+static inline void extif_write32(struct ssb_extif *extif, u16 offset, u32 value)
+{
+ ssb_write32(extif->dev, offset, value);
+}
+
static const u32 ipsflag_irq_mask[] = {
0,
SSB_IPSFLAG_IRQ1,
@@ -183,6 +194,26 @@
}
}
+static void ssb_extif_timing_init(struct ssb_extif *extif, u32 ns)
+{
+ u32 tmp;
+
+ /* Initialize extif so we can get to the LEDs and external UART */
+ extif_write32(extif, SSB_EXTIF_PROG_CFG, SSB_EXTCFG_EN);
+
+ /* Set timing for the flash */
+ tmp = DIV_ROUND_UP(10, ns) << SSB_PROG_WCNT_3_SHIFT;
+ tmp |= DIV_ROUND_UP(40, ns) << SSB_PROG_WCNT_1_SHIFT;
+ tmp |= DIV_ROUND_UP(120, ns);
+ extif_write32(extif, SSB_EXTIF_PROG_WAITCNT, tmp);
+
+ /* Set programmable interface timing for external uart */
+ tmp = DIV_ROUND_UP(10, ns) << SSB_PROG_WCNT_3_SHIFT;
+ tmp |= DIV_ROUND_UP(20, ns) << SSB_PROG_WCNT_2_SHIFT;
+ tmp |= DIV_ROUND_UP(100, ns) << SSB_PROG_WCNT_1_SHIFT;
+ tmp |= DIV_ROUND_UP(120, ns);
+ extif_write32(extif, SSB_EXTIF_PROG_WAITCNT, tmp);
+}
static void ssb_cpu_clock(struct ssb_mipscore *mcore)
{
@@ -205,27 +236,9 @@
hz = 100000000;
ns = 1000000000 / hz;
-//TODO
-#if 0
- if (have EXTIF) {
- /* Initialize extif so we can get to the LEDs and external UART */
- W_REG(&eir->prog_config, CF_EN);
-
- /* Set timing for the flash */
- tmp = CEIL(10, ns) << FW_W3_SHIFT; /* W3 = 10nS */
- tmp = tmp | (CEIL(40, ns) << FW_W1_SHIFT); /* W1 = 40nS */
- tmp = tmp | CEIL(120, ns); /* W0 = 120nS */
- W_REG(&eir->prog_waitcount, tmp); /* 0x01020a0c for a 100Mhz clock */
-
- /* Set programmable interface timing for external uart */
- tmp = CEIL(10, ns) << FW_W3_SHIFT; /* W3 = 10nS */
- tmp = tmp | (CEIL(20, ns) << FW_W2_SHIFT); /* W2 = 20nS */
- tmp = tmp | (CEIL(100, ns) << FW_W1_SHIFT); /* W1 = 100nS */
- tmp = tmp | CEIL(120, ns); /* W0 = 120nS */
- W_REG(&eir->prog_waitcount, tmp);
- }
-#endif
- if (bus->chipco.dev)
+ if (bus->extif.dev)
+ ssb_extif_timing_init(&bus->extif, ns);
+ else if (bus->chipco.dev)
ssb_chipco_timing_init(&bus->chipco, ns);
/* Assign IRQs to all cores on the bus, start with irq line 2, because serial usually takes 1 */
--
.''`. Aurelien Jarno | GPG: 1024D/F1BCDB73
: :' : Debian developer | Electrical Engineer
`. `' aurel32@...ian.org | aurelien@...el32.net
`- people.debian.org/~aurel32 | www.aurel32.net
-
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