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Message-Id: <201011101137.oAABbFoc015547@amcc.com>
Date: Wed, 10 Nov 2010 17:07:15 +0530
From: Rupjyoti Sarmah <rsarmah@...c.com>
To: linuxppc-dev@...abs.org, linux-kernel@...r.kernel.org
Cc: rsarmah@....com
Subject: [PATCH] ppc44x:PHY fixup for USB on canyonlands board
This fix is a reset for USB PHY that requires some amount of time for power to be stable on Canyonlands.
Signed-off-by: Rupjyoti Sarmah <rsarmah@....com>
---
arch/powerpc/boot/dts/canyonlands.dts | 11 ++++
arch/powerpc/platforms/44x/44x.h | 5 ++
arch/powerpc/platforms/44x/Kconfig | 7 ++
arch/powerpc/platforms/44x/Makefile | 1 +
arch/powerpc/platforms/44x/ppc44x_fixup.c | 90 +++++++++++++++++++++++++++++
5 files changed, 114 insertions(+), 0 deletions(-)
create mode 100644 arch/powerpc/platforms/44x/ppc44x_fixup.c
diff --git a/arch/powerpc/boot/dts/canyonlands.dts b/arch/powerpc/boot/dts/canyonlands.dts
index a303703..d6e9ba2 100644
--- a/arch/powerpc/boot/dts/canyonlands.dts
+++ b/arch/powerpc/boot/dts/canyonlands.dts
@@ -171,6 +171,11 @@
0x5 0x4>; /* AHBDMA */
};
+ CPLD: cpld@...00000 {
+ compatible = "apm, ppc460ex-bcsr";
+ reg = <4 0xe1000000 0x9>;
+ };
+
POB0: opb {
compatible = "ibm,opb-460ex", "ibm,opb";
#address-cells = <1>;
@@ -320,6 +325,12 @@
interrupts = <0x3 0x4>;
};
+ GPIO0: gpio@...00b00 {
+ compatible = "apm,ppc44x-gpio-base";
+ reg = <0xef600b00 0x00000048>;
+ gpio-controller;
+ };
+
ZMII0: emac-zmii@...00d00 {
compatible = "ibm,zmii-460ex", "ibm,zmii";
reg = <0xef600d00 0x0000000c>;
diff --git a/arch/powerpc/platforms/44x/44x.h b/arch/powerpc/platforms/44x/44x.h
index dbc4d2b..bc2ab7a 100644
--- a/arch/powerpc/platforms/44x/44x.h
+++ b/arch/powerpc/platforms/44x/44x.h
@@ -4,4 +4,9 @@
extern u8 as1_readb(volatile u8 __iomem *addr);
extern void as1_writeb(u8 data, volatile u8 __iomem *addr);
+#define BCSR_USB_EN 0x11
+#define GPIO0_OSRH 0xC
+#define GPIO0_TSRH 0x14
+#define GPIO0_ISR1H 0x34
+
#endif /* __POWERPC_PLATFORMS_44X_44X_H */
diff --git a/arch/powerpc/platforms/44x/Kconfig b/arch/powerpc/platforms/44x/Kconfig
index 0f979c5..9ca4aaa 100644
--- a/arch/powerpc/platforms/44x/Kconfig
+++ b/arch/powerpc/platforms/44x/Kconfig
@@ -117,12 +117,19 @@ config CANYONLANDS
default n
select PPC44x_SIMPLE
select 460EX
+ select 44X_FIXUP
select PCI
select PPC4xx_PCI_EXPRESS
select IBM_NEW_EMAC_RGMII
select IBM_NEW_EMAC_ZMII
help
This option enables support for the AMCC PPC460EX evaluation board.
+config 44X_FIXUP
+ bool "4xx_fixup"
+ depends on 44x
+ default n
+ help
+ This option enables supporting APM PPC4XX based evaluation board fixups.
config GLACIER
bool "Glacier"
diff --git a/arch/powerpc/platforms/44x/Makefile b/arch/powerpc/platforms/44x/Makefile
index 82ff326..d4bfb97 100644
--- a/arch/powerpc/platforms/44x/Makefile
+++ b/arch/powerpc/platforms/44x/Makefile
@@ -1,6 +1,7 @@
obj-$(CONFIG_44x) := misc_44x.o idle.o
obj-$(CONFIG_PPC44x_SIMPLE) += ppc44x_simple.o
obj-$(CONFIG_EBONY) += ebony.o
+obj-$(CONFIG_44X_FIXUP) += ppc44x_fixup.o
obj-$(CONFIG_SAM440EP) += sam440ep.o
obj-$(CONFIG_WARP) += warp.o
obj-$(CONFIG_XILINX_VIRTEX_5_FXT) += virtex.o
diff --git a/arch/powerpc/platforms/44x/ppc44x_fixup.c b/arch/powerpc/platforms/44x/ppc44x_fixup.c
new file mode 100644
index 0000000..4e254eb
--- /dev/null
+++ b/arch/powerpc/platforms/44x/ppc44x_fixup.c
@@ -0,0 +1,90 @@
+/*
+ * This contain fixup code for Applied Micro ppc44x series of processors.
+ *
+ * Copyright (c) 2010, Applied Micro Circuits Corporation
+ * Author: Rupjyoti Sarmah <rsarmah@....com>
+ *
+ * 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; either version 2 of
+ * the License, or (at your option) any later version.
+ *
+ * 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.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
+ * MA 02111-1307 USA
+ *
+ */
+
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/io.h>
+#include <linux/of.h>
+#include "44x.h"
+
+/* PHY fixup code on Canyonlands kit. */
+
+static int __init ppc460ex_canyonlands_fixup(void)
+{
+ u8 __iomem *bcsr ;
+ void __iomem *vaddr;
+ struct device_node *np;
+ u32 val ;
+
+ np = of_find_compatible_node(NULL, NULL, "apm, ppc460ex-bcsr");
+ if (!np) {
+ printk(KERN_ERR "failed did not find apm, ppc460ex bcsr node\n");
+ return -ENODEV;
+ }
+
+ bcsr = of_iomap(np, 0);
+ of_node_put(np);
+
+ if (!bcsr) {
+ printk(KERN_CRIT "Could not remap bcsr\n");
+ return -ENODEV;
+ }
+
+ clrbits8(&bcsr[7], BCSR_USB_EN);
+ udelay(100000);
+
+ setbits8(&bcsr[7], BCSR_USB_EN);
+ udelay(100000);
+
+ clrbits8(&bcsr[7], BCSR_USB_EN);
+ udelay(100000);
+
+ np = of_find_compatible_node(NULL, NULL, "apm,ppc44x-gpio-base");
+
+ /* configure multiplexed gpio16 and gpio19 */
+
+ vaddr = of_iomap(np, 0);
+ if (!vaddr) {
+ printk(KERN_CRIT "Could not get gpio node address\n");
+ return -ENODEV;
+ }
+
+ /* configure gpio16 and gpio19 as alternate1 */
+
+ /* GPIO0_ISR1H for alternate 1 settings */
+ val = in_be32(vaddr + GPIO0_ISR1H);
+ out_be32((vaddr + GPIO0_ISR1H), val | 0x4200000);
+
+ /* GPIO0_OSRH for alternate 1 settings */
+ val = in_be32(vaddr + GPIO0_OSRH);
+ out_be32((vaddr + GPIO0_OSRH), val | 0x42000000);
+
+ /* GPIO0_TSRH for alternate 1 settings */
+ val = in_be32(vaddr + GPIO0_TSRH);
+ out_be32((vaddr + GPIO0_TSRH), val | 0x42000000);
+ of_node_put(np);
+ return 0;
+
+}
+arch_initcall(ppc460ex_canyonlands_fixup);
+
--
1.5.6.3
--
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