[U-Boot] [PATCH v2 09/14] arm/km: add support for external switch configuration

Holger Brunck
2012-06-13T13:33:15Z

From: Valentin Longchamp <valentin.longchamp@keymile.com>

This can be used if we do not want to use an EEPROM for the
configuration.

Signed-off-by: Valentin Longchamp <valentin.longchamp@keymile.com>
cc: Holger Brunck <holger.brunck@keymile.com>
cc: Prafulla Wadaskar <prafulla@marvell.com>
---
changes for v2:
- nothing

board/keymile/common/common.h | 7 --
board/keymile/km_arm/managed_switch.c | 169 +++++++++++++++++++++++++++++++--
board/keymile/km_arm/managed_switch.h | 99 +++++++++++++++++++
3 files changed, 258 insertions(+), 17 deletions(-)
create mode 100644 board/keymile/km_arm/managed_switch.h

diff --git a/board/keymile/common/common.h b/board/keymile/common/common.h
index c58e565..e9abfcd 100644
--- a/board/keymile/common/common.h
+++ b/board/keymile/common/common.h
@@ -125,13 +125,6 @@ struct bfticu_iomap {
int ethernet_present(void);
int ivm_read_eeprom(void);

-
-int ext_switch_reg_write(const char *devname, u8 phy_addr, u8 port,
- u8 reg, u16 data);
-int ext_switch_reg_read(const char *devname, u8 phy_addr, u8 port,
- u8 reg, u16 *data);
-
-
int trigger_fpga_config(void);
int wait_for_fpga_config(void);
int fpga_reset(void);
diff --git a/board/keymile/km_arm/managed_switch.c b/board/keymile/km_arm/managed_switch.c
index 482c18d..3b022cd 100644
--- a/board/keymile/km_arm/managed_switch.c
+++ b/board/keymile/km_arm/managed_switch.c
@@ -25,15 +25,43 @@
#include <miiphy.h>
#include <asm/errno.h>

-#define SMI_HDR ((0x8 | 0x1) << 12)
-#define SMI_BUSY_MASK (0x8000)
-#define SMIRD_OP (0x2 << 10)
-#define SMIWR_OP (0x1 << 10)
-#define SMI_MASK 0x1f
-#define PORT_SHIFT 5
+#include "managed_switch.h"

-#define COMMAND_REG 0
-#define DATA_REG 1
+#if defined(CONFIG_KM_NUSA)
+struct switch_reg sw_conf[] = {
+ /* port 0, PIGY4, autoneg */
+ { PORT(0), PORT_PHY, NO_SPEED_FOR },
+ { PORT(0), PORT_CTRL, FORWARDING | EGRS_FLD_ALL },
+ { PHY(0), PHY_CTRL, PHY_100_MBPS | AUTONEG_EN | AUTONEG_RST |
+ FULL_DUPLEX },
+ { PHY(0), PHY_SPEC_CTRL, AUTO_MDIX_EN },
+ /* port 1, unused */
+ { PORT(1), PORT_CTRL, PORT_DIS },
+ { PHY(1), PHY_CTRL, PHY_PWR_DOWN },
+ { PHY(1), PHY_SPEC_CTRL, SPEC_PWR_DOWN },
+ /* port 2, unused */
+ { PORT(2), PORT_CTRL, PORT_DIS },
+ { PHY(2), PHY_CTRL, PHY_PWR_DOWN },
+ { PHY(2), PHY_SPEC_CTRL, SPEC_PWR_DOWN },
+ /* port 3, unused */
+ { PORT(3), PORT_CTRL, PORT_DIS },
+ { PHY(3), PHY_CTRL, PHY_PWR_DOWN },
+ { PHY(3), PHY_SPEC_CTRL, SPEC_PWR_DOWN },
+ /* port 4, ICNEV, SerDes, SGMII */
+ { PORT(4), PORT_STATUS, NO_PHY_DETECT },
+ { PORT(4), PORT_PHY, SPEED_1000_FOR },
+ { PORT(4), PORT_CTRL, FORWARDING | EGRS_FLD_ALL },
+ { PHY(4), PHY_CTRL, PHY_PWR_DOWN },
+ { PHY(4), PHY_SPEC_CTRL, SPEC_PWR_DOWN },
+ /* port 5, CPU_RGMII */
+ { PORT(5), PORT_PHY, RX_RGMII_TIM | TX_RGMII_TIM | FLOW_CTRL_EN |
+ FLOW_CTRL_FOR | LINK_VAL | LINK_FOR | FULL_DPX |
+ FULL_DPX_FOR | SPEED_1000_FOR },
+ { PORT(5), PORT_CTRL, FORWARDING | EGRS_FLD_ALL },
+ /* port 6, unused, this port has no phy */
+ { PORT(6), PORT_CTRL, PORT_DIS },
+};
+#endif

static int ext_switch_wait_rdy(const char *devname, u8 phy_addr)
{
@@ -59,7 +87,7 @@ static int ext_switch_wait_rdy(const char *devname, u8 phy_addr)
return 0;
}

-int ext_switch_reg_read(const char *devname, u8 phy_addr, u8 port,
+static int ext_switch_reg_read(const char *devname, u8 phy_addr, u8 port,
u8 reg, u16 *data)
{
int ret;
@@ -85,7 +113,7 @@ int ext_switch_reg_read(const char *devname, u8 phy_addr, u8 port,
return ret;
}

-int ext_switch_reg_write(const char *devname, u8 phy_addr, u8 port,
+static int ext_switch_reg_write(const char *devname, u8 phy_addr, u8 port,
u8 reg, u16 data)
{
int ret;
@@ -114,6 +142,127 @@ int ext_switch_reg_write(const char *devname, u8 phy_addr, u8 port,
return 0;
}

+static int ppu_enable(const char *devname, u8 phy_addr)
+{
+ int i, ret = 0;
+ u16 reg;
+
+ ret = ext_switch_reg_read(devname, phy_addr, GLOBAL, GLOBAL_CTRL, &reg);
+ if (ret) {
+ printf("%s: Error reading global ctrl reg\n", __func__);
+ return ret;
+ }
+
+ reg |= PPU_ENABLE;
+
+ ret = ext_switch_reg_write(devname, phy_addr, GLOBAL, GLOBAL_CTRL, reg);
+ if (ret) {
+ printf("%s: Error writing global ctrl reg\n", __func__);
+ return ret;
+ }
+
+ for (i = 0; i < 1000; i++) {
+ ext_switch_reg_read(devname, phy_addr, GLOBAL, GLOBAL_STATUS,
+ &reg);
+ if ((reg & 0xc000) == 0xc000)
+ return 0;
+ udelay(1000);
+ }
+
+ return -ETIMEDOUT;
+}
+
+static int ppu_disable(const char *devname, u8 phy_addr)
+{
+ int i, ret = 0;
+ u16 reg;
+
+ ret = ext_switch_reg_read(devname, phy_addr, GLOBAL, GLOBAL_CTRL, &reg);
+ if (ret) {
+ printf("%s: Error reading global ctrl reg\n", __func__);
+ return ret;
+ }
+
+ reg &= ~PPU_ENABLE;
+
+ ret = ext_switch_reg_write(devname, phy_addr, GLOBAL, GLOBAL_CTRL, reg);
+ if (ret) {
+ printf("%s: Error writing global ctrl reg\n", __func__);
+ return ret;
+ }
+
+ for (i = 0; i < 1000; i++) {
+ ext_switch_reg_read(devname, phy_addr, GLOBAL, GLOBAL_STATUS,
+ &reg);
+ if ((reg & 0xc000) != 0xc000)
+ return 0;
+ udelay(1000);
+ }
+
+ return -ETIMEDOUT;
+}
+
+int ext_switch_program(const char *devname, u8 phy_addr)
+{
+ int i, ret = 0;
+
+ /* first we need to disable the PPU */
+ ret = ppu_disable(devname, phy_addr);
+ if (ret) {
+ printf("%s: Error disabling PPU\n", __func__);
+ return ret;
+ }
+
+ for (i = 0; i < ARRAY_SIZE(sw_conf); i++) {
+ ret = ext_switch_reg_write(devname, phy_addr, sw_conf[i].port,
+ sw_conf[i].reg, sw_conf[i].value);
+ if (ret) {
+ printf("%s: Error configuring switch\n", __func__);
+ ppu_enable(devname, phy_addr);
+ return ret;
+ }
+ }
+
+ /* re-enable the PPU */
+ ret = ppu_enable(devname, phy_addr);
+ if (ret) {
+ printf("%s: Error enabling PPU\n", __func__);
+ return ret;
+ }
+
+ return 0;
+}
+
+int ext_switch_reset(const char *devname, u8 phy_addr)
+{
+ int i, ret = 0;
+ u16 reg;
+
+ ret = ext_switch_reg_read(devname, phy_addr, GLOBAL, GLOBAL_CTRL, &reg);
+ if (ret) {
+ printf("%s: Error reading global ctrl reg\n", __func__);
+ return ret;
+ }
+
+ reg = SW_RESET | PPU_ENABLE | 0x0400;
+
+ ret = ext_switch_reg_write(devname, phy_addr, GLOBAL, GLOBAL_CTRL, reg);
+ if (ret) {
+ printf("%s: Error writing global ctrl reg\n", __func__);
+ return ret;
+ }
+
+ for (i = 0; i < 1000; i++) {
+ ext_switch_reg_read(devname, phy_addr, GLOBAL, GLOBAL_STATUS,
+ &reg);
+ if ((reg & 0xc800) != 0xc800)
+ return 0;
+ udelay(1000);
+ }
+
+ return -ETIMEDOUT;
+}
+
int do_sw_reg_read(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
{
char *name = "egiga0";
diff --git a/board/keymile/km_arm/managed_switch.h b/board/keymile/km_arm/managed_switch.h
new file mode 100644
index 0000000..c0dcf82
--- /dev/null
+++ b/board/keymile/km_arm/managed_switch.h
@@ -0,0 +1,99 @@
+/*
+ * (C) Copyright 2012
+ * Valentin Lontgchamp, Keymile AG, valentin.longchamp@keymile.com
+ *
+ * See file CREDITS for list of people who contributed to this
+ * project.
+ *
+ * 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., 51 Franklin Street, Fifth Floor, Boston,
+ * MA 02110-1301 USA
+ */
+
+#ifndef __MANAGED_SWITCH_H
+#define __MANAGED_SWITCH_H
+
+#include <common.h>
+
+#define SMI_HDR ((0x8 | 0x1) << 12)
+#define SMI_BUSY_MASK (0x8000)
+#define SMIRD_OP (0x2 << 10)
+#define SMIWR_OP (0x1 << 10)
+#define SMI_MASK 0x1f
+#define PORT_SHIFT 5
+
+#define COMMAND_REG 0
+#define DATA_REG 1
+
+/* global registers */
+#define GLOBAL 0x1b
+
+#define GLOBAL_STATUS 0x00
+#define PPU_STATE 0x8000
+
+#define GLOBAL_CTRL 0x04
+#define SW_RESET 0x8000
+#define PPU_ENABLE 0x4000
+
+/* PHY registers */
+#define PHY(itf) (itf)
+
+#define PHY_CTRL 0x00
+#define PHY_100_MBPS 0x2000
+#define AUTONEG_EN 0x1000
+#define AUTONEG_RST 0x0200
+#define FULL_DUPLEX 0x0100
+#define PHY_PWR_DOWN 0x0800
+
+#define PHY_STATUS 0x01
+
+#define PHY_SPEC_CTRL 0x10
+#define SPEC_PWR_DOWN 0x0004
+#define AUTO_MDIX_EN 0x0060
+
+/* PORT or MAC registers */
+#define PORT(itf) (itf+0x10)
+
+#define PORT_STATUS 0x00
+#define NO_PHY_DETECT 0x0000
+
+#define PORT_PHY 0x01
+#define RX_RGMII_TIM 0x8000
+#define TX_RGMII_TIM 0x4000
+#define FLOW_CTRL_EN 0x0080
+#define FLOW_CTRL_FOR 0x0040
+#define LINK_VAL 0x0020
+#define LINK_FOR 0x0010
+#define FULL_DPX 0x0008
+#define FULL_DPX_FOR 0x0004
+#define NO_SPEED_FOR 0x0003
+#define SPEED_1000_FOR 0x0002
+#define SPEED_100_FOR 0x0001
+#define SPEED_10_FOR 0x0000
+
+#define PORT_CTRL 0x04
+#define FORWARDING 0x0003
+#define EGRS_FLD_ALL 0x000c
+#define PORT_DIS 0x0000
+
+struct switch_reg {
+ u8 port;
+ u8 reg;
+ u16 value;
+};
+
+int ext_switch_reset(const char *devname, u8 phy_addr);
+int ext_switch_program(const char *devname, u8 phy_addr);
+
+#endif
--
1.7.1