MN10300: ASB2364: Add support for SMSC911X and SMC911X

Add support for SMSC911X and SMC911X for the ASB2364 unit.

Signed-off-by: Akira Takeuchi <takeuchi.akr@jp.panasonic.com>
Signed-off-by: Kiyoshi Owada <owada.kiyoshi@jp.panasonic.com>
Signed-off-by: David Howells <dhowells@redhat.com>
cc: steve.glendinning@smsc.com
cc: netdev@vger.kernel.org

5 files changed, 233 insertions, 0 deletions

diff --git a/arch/mn10300/Kconfig b/arch/mn10300/Kconfig
index 42ca55a47377..129ca492e917 100644
--- a/arch/mn10300/Kconfig
+++ b/arch/mn10300/Kconfig
@@ -117,6 +117,7 @@ config MN10300_UNIT_ASB2305
 
 config MN10300_UNIT_ASB2364
         bool "ASB2364"
+        select SMSC911X_ARCH_HOOKS if SMSC911X
 
 endchoice
 
diff --git a/arch/mn10300/include/asm/smsc911x.h b/arch/mn10300/include/asm/smsc911x.h
new file mode 100644
index 000000000000..2fcd1080322b
--- /dev/null
+++ b/arch/mn10300/include/asm/smsc911x.h
@@ -0,0 +1 @@
+#include <unit/smsc911x.h>
diff --git a/arch/mn10300/unit-asb2364/Makefile b/arch/mn10300/unit-asb2364/Makefile
index e9d9b90ef6da..b3263ecfc4ff 100644
--- a/arch/mn10300/unit-asb2364/Makefile
+++ b/arch/mn10300/unit-asb2364/Makefile
@@ -8,3 +8,5 @@
 # Note 2! The CFLAGS definitions are now in the main makefile...
 
 obj-y   := unit-init.o leds.o irq-fpga.o
+
+obj-$(CONFIG_SMSC911X) += smsc911x.o
diff --git a/arch/mn10300/unit-asb2364/include/unit/smsc911x.h b/arch/mn10300/unit-asb2364/include/unit/smsc911x.h
new file mode 100644
index 000000000000..4c1ede535fa9
--- /dev/null
+++ b/arch/mn10300/unit-asb2364/include/unit/smsc911x.h
@@ -0,0 +1,171 @@
+/* Support for the SMSC911x NIC
+ *
+ * Copyright (C) 2006 Matsushita Electric Industrial Co., Ltd.
+ * All Rights Reserved.
+ *
+ * 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.
+ */
+#ifndef _ASM_UNIT_SMSC911X_H
+#define _ASM_UNIT_SMSC911X_H
+
+#include <linux/netdevice.h>
+#include <proc/irq.h>
+#include <unit/fpga-regs.h>
+
+#define MN10300_USE_EXT_EEPROM
+
+
+#define SMSC911X_BASE           0xA8000000UL
+#define SMSC911X_BASE_END       0xA8000100UL
+#define SMSC911X_IRQ            FPGA_LAN_IRQ
+
+/*
+ * Allow the FPGA to be initialised by the SMSC911x driver
+ */
+#undef SMSC_INITIALIZE
+#define SMSC_INITIALIZE()                                       \
+do {                                                            \
+        /* release reset */                                     \
+        ASB2364_FPGA_REG_RESET_LAN = 0x0001;                    \
+        SyncExBus();                                            \
+} while (0)
+
+#ifdef MN10300_USE_EXT_EEPROM
+#include <linux/delay.h>
+#include <unit/clock.h>
+
+#define EEPROM_ADDRESS  0xA0
+#define MAC_OFFSET      0x0008
+#define USE_IIC_CH      0       /* 0 or 1 */
+#define IIC_OFFSET      (0x80000 * USE_IIC_CH)
+#define IIC_DTRM        __SYSREG(0xd8400000 + IIC_OFFSET, u32)
+#define IIC_DREC        __SYSREG(0xd8400004 + IIC_OFFSET, u32)
+#define IIC_MYADD       __SYSREG(0xd8400008 + IIC_OFFSET, u32)
+#define IIC_CLK         __SYSREG(0xd840000c + IIC_OFFSET, u32)
+#define IIC_BRST        __SYSREG(0xd8400010 + IIC_OFFSET, u32)
+#define IIC_HOLD        __SYSREG(0xd8400014 + IIC_OFFSET, u32)
+#define IIC_BSTS        __SYSREG(0xd8400018 + IIC_OFFSET, u32)
+#define IIC_ICR         __SYSREG(0xd4000080 + 4 * USE_IIC_CH, u16)
+
+#define IIC_CLK_PLS     ((unsigned short)(MN10300_IOCLK / 100000 - 1))
+#define IIC_CLK_LOW     ((unsigned short)(IIC_CLK_PLS / 2))
+
+#define SYS_IIC_DTRM_Bit_STA    ((unsigned short)0x0400)
+#define SYS_IIC_DTRM_Bit_STO    ((unsigned short)0x0200)
+#define SYS_IIC_DTRM_Bit_ACK    ((unsigned short)0x0100)
+#define SYS_IIC_DTRM_Bit_DATA   ((unsigned short)0x00FF)
+
+static inline void POLL_INT_REQ(volatile u16 *icr)
+{
+        unsigned long flags;
+        u16 tmp;
+
+        while (!(*icr & GxICR_REQUEST))
+                ;
+        flags = arch_local_cli_save();
+        tmp = *icr;
+        *icr = (tmp & GxICR_LEVEL) | GxICR_DETECT;
+        tmp = *icr;
+        arch_local_irq_restore(flags);
+}
+
+/*
+ * Implement the SMSC911x hook for MAC address retrieval
+ */
+#undef smsc_get_mac
+static inline int smsc_get_mac(struct net_device *dev)
+{
+        unsigned char *mac_buf = dev->dev_addr;
+        int i;
+        unsigned short value;
+        unsigned int data;
+        int mac_length = 6;
+        int check;
+        u16 orig_gicr, tmp;
+        unsigned long flags;
+
+        /* save original GnICR and clear GnICR.IE */
+        flags = arch_local_cli_save();
+        orig_gicr = IIC_ICR;
+        IIC_ICR = orig_gicr & GxICR_LEVEL;
+        tmp = IIC_ICR;
+        arch_local_irq_restore(flags);
+
+        IIC_MYADD = 0x00000008;
+        IIC_CLK = (IIC_CLK_LOW << 16) + (IIC_CLK_PLS);
+        /* bus hung recovery */
+
+        while (1) {
+                check = 0;
+                for (i = 0; i < 3; i++) {
+                        if ((IIC_BSTS & 0x00000003) == 0x00000003)
+                                check++;
+                        udelay(3);
+                }
+
+                if (check == 3) {
+                        IIC_BRST = 0x00000003;
+                        break;
+                } else {
+                        for (i = 0; i < 3; i++) {
+                                IIC_BRST = 0x00000002;
+                                udelay(8);
+                                IIC_BRST = 0x00000003;
+                                udelay(8);
+                        }
+                }
+        }
+
+        IIC_BRST = 0x00000002;
+        IIC_BRST = 0x00000003;
+
+        value   =  SYS_IIC_DTRM_Bit_STA | SYS_IIC_DTRM_Bit_ACK;
+        value   |= (((unsigned short)EEPROM_ADDRESS & SYS_IIC_DTRM_Bit_DATA) |
+                    (unsigned short)0x0000);
+        IIC_DTRM = value;
+        POLL_INT_REQ(&IIC_ICR);
+
+        /** send offset of MAC address in EEPROM **/
+        IIC_DTRM = (unsigned char)((MAC_OFFSET & 0xFF00) >> 8);
+        POLL_INT_REQ(&IIC_ICR);
+
+        IIC_DTRM = (unsigned char)(MAC_OFFSET & 0x00FF);
+        POLL_INT_REQ(&IIC_ICR);
+
+        udelay(1000);
+
+        value   =  SYS_IIC_DTRM_Bit_STA;
+        value   |= (((unsigned short)EEPROM_ADDRESS & SYS_IIC_DTRM_Bit_DATA) |
+                    (unsigned short)0x0001);
+        IIC_DTRM = value;
+        POLL_INT_REQ(&IIC_ICR);
+
+        IIC_DTRM = 0x00000000;
+        while (mac_length > 0) {
+                POLL_INT_REQ(&IIC_ICR);
+
+                data = IIC_DREC;
+                mac_length--;
+                if (mac_length == 0)
+                        value = 0x00000300;     /* stop IIC bus */
+                else if (mac_length == 1)
+                        value = 0x00000100;     /* no ack */
+                else
+                        value = 0x00000000;     /* ack */
+                IIC_DTRM = value;
+                *mac_buf++ = (unsigned char)(data & 0xff);
+        }
+
+        /* restore GnICR.LV and GnICR.IE */
+        flags = arch_local_cli_save();
+        IIC_ICR = (orig_gicr & (GxICR_LEVEL | GxICR_ENABLE));
+        tmp = IIC_ICR;
+        arch_local_irq_restore(flags);
+
+        return 0;
+}
+#endif /* MN10300_USE_EXT_EEPROM */
+#endif /* _ASM_UNIT_SMSC911X_H */
diff --git a/arch/mn10300/unit-asb2364/smsc911x.c b/arch/mn10300/unit-asb2364/smsc911x.c
new file mode 100644
index 000000000000..544a73e94c81
--- /dev/null
+++ b/arch/mn10300/unit-asb2364/smsc911x.c
@@ -0,0 +1,58 @@
+/* Specification for the SMSC911x NIC
+ *
+ * Copyright (C) 2006 Matsushita Electric Industrial Co., Ltd.
+ * All Rights Reserved.
+ *
+ * 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.
+ */
+
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/platform_device.h>
+#include <linux/io.h>
+#include <linux/ioport.h>
+#include <linux/smsc911x.h>
+#include <unit/smsc911x.h>
+
+static struct smsc911x_platform_config smsc911x_config = {
+        .irq_polarity   = SMSC911X_IRQ_POLARITY_ACTIVE_LOW,
+        .irq_type       = SMSC911X_IRQ_TYPE_OPEN_DRAIN,
+        .flags          = SMSC911X_USE_32BIT,
+};
+
+static struct resource smsc911x_resources[] = {
+        [0] = {
+                .start  = SMSC911X_BASE,
+                .end    = SMSC911X_BASE_END,
+                .flags  = IORESOURCE_MEM,
+        },
+        [1] = {
+                .start  = SMSC911X_IRQ,
+                .end    = SMSC911X_IRQ,
+                .flags  = IORESOURCE_IRQ,
+        },
+};
+
+static struct platform_device smsc911x_device = {
+        .name           = "smsc911x",
+        .id             = 0,
+        .num_resources  = ARRAY_SIZE(smsc911x_resources),
+        .resource       = smsc911x_resources,
+        .dev            = {
+                .platform_data = &smsc911x_config,
+        }
+};
+
+/*
+ * add platform devices
+ */
+static int __init unit_device_init(void)
+{
+        platform_device_register(&smsc911x_device);
+        return 0;
+}
+
+device_initcall(unit_device_init);