[PATCH 1/4] drivers: net: add driver for TI CPSW
Sascha Hauer
s.hauer at pengutronix.de
Wed Jan 9 06:02:43 EST 2013
From: Jan Luebbe <jlu at pengutronix.de>
Signed-off-by: Jan Luebbe <jlu at pengutronix.de>
Signed-off-by: Sascha Hauer <s.hauer at pengutronix.de>
---
arch/arm/mach-omap/include/mach/cpsw.h | 29 +
drivers/net/Kconfig | 4 +
drivers/net/Makefile | 1 +
drivers/net/cpsw.c | 1070 ++++++++++++++++++++++++++++++++
4 files changed, 1104 insertions(+)
create mode 100644 arch/arm/mach-omap/include/mach/cpsw.h
create mode 100644 drivers/net/cpsw.c
diff --git a/arch/arm/mach-omap/include/mach/cpsw.h b/arch/arm/mach-omap/include/mach/cpsw.h
new file mode 100644
index 0000000..5474667
--- /dev/null
+++ b/arch/arm/mach-omap/include/mach/cpsw.h
@@ -0,0 +1,29 @@
+/*
+ * CPSW Ethernet Switch Driver
+ *
+ * Copyright (C) 2010 Texas Instruments Incorporated - http://www.ti.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 version 2.
+ *
+ * This program is distributed "as is" WITHOUT ANY WARRANTY of any
+ * kind, whether express or implied; without even the implied warranty
+ * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ */
+
+#ifndef _CPSW_H_
+#define _CPSW_H_
+
+struct cpsw_slave_data {
+ int phy_id;
+ int phy_if;
+};
+
+struct cpsw_platform_data {
+ struct cpsw_slave_data *slave_data;
+ int num_slaves;
+};
+
+#endif /* _CPSW_H_ */
diff --git a/drivers/net/Kconfig b/drivers/net/Kconfig
index 43d5984..cf6ceee 100644
--- a/drivers/net/Kconfig
+++ b/drivers/net/Kconfig
@@ -31,6 +31,10 @@ config DRIVER_NET_CS8900
bool "cs8900 ethernet driver"
depends on HAS_CS8900
+config DRIVER_NET_CPSW
+ bool "CPSW ethernet driver"
+ select PHYLIB
+
config DRIVER_NET_SMC911X
bool "smc911x ethernet driver"
select PHYLIB
diff --git a/drivers/net/Makefile b/drivers/net/Makefile
index 4e6b49b..6e1aeaa 100644
--- a/drivers/net/Makefile
+++ b/drivers/net/Makefile
@@ -1,4 +1,5 @@
obj-$(CONFIG_DRIVER_NET_CS8900) += cs8900.o
+obj-$(CONFIG_DRIVER_NET_CPSW) += cpsw.o
obj-$(CONFIG_DRIVER_NET_SMC911X) += smc911x.o
obj-$(CONFIG_DRIVER_NET_SMC91111) += smc91111.o
obj-$(CONFIG_DRIVER_NET_DAVINCI_EMAC) += davinci_emac.o
diff --git a/drivers/net/cpsw.c b/drivers/net/cpsw.c
new file mode 100644
index 0000000..58c097a
--- /dev/null
+++ b/drivers/net/cpsw.c
@@ -0,0 +1,1070 @@
+/*
+ * CPSW Ethernet Switch Driver
+ *
+ * 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.
+ *
+ */
+
+#include <common.h>
+#include <driver.h>
+#include <init.h>
+
+#include <command.h>
+#include <net.h>
+#include <malloc.h>
+#include <net.h>
+#include <linux/phy.h>
+#include <errno.h>
+#include <io.h>
+#include <xfuncs.h>
+#include <asm/mmu.h>
+#include <asm/system.h>
+
+#include <mach/cpsw.h>
+
+#define CPSW_VERSION_1 0x19010a
+#define CPSW_VERSION_2 0x19010c
+
+#define BITMASK(bits) ((1 << (bits)) - 1)
+#define PHY_REG_MASK 0x1f
+#define PHY_ID_MASK 0x1f
+#define NUM_DESCS (PKTBUFSRX * 2)
+#define PKT_MIN 60
+#define PKT_MAX (1500 + 14 + 4 + 4)
+
+/* DMA Registers */
+#define CPDMA_TXCONTROL 0x004
+#define CPDMA_RXCONTROL 0x014
+#define CPDMA_SOFTRESET 0x01c
+#define CPDMA_RXFREE 0x0e0
+#define STATERAM_TXHDP 0x000
+#define STATERAM_RXHDP 0x020
+#define STATERAM_TXCP 0x040
+#define STATERAM_RXCP 0x060
+
+#define CPDMA_RAM_ADDR 0x4a102000
+
+/* Descriptor mode bits */
+#define CPDMA_DESC_SOP BIT(31)
+#define CPDMA_DESC_EOP BIT(30)
+#define CPDMA_DESC_OWNER BIT(29)
+#define CPDMA_DESC_EOQ BIT(28)
+
+#define SLIVER_SIZE 0x40
+
+struct cpsw_mdio_regs {
+ u32 version;
+ u32 control;
+#define CONTROL_IDLE (1 << 31)
+#define CONTROL_ENABLE (1 << 30)
+
+ u32 alive;
+ u32 link;
+ u32 linkintraw;
+ u32 linkintmasked;
+ u32 __reserved_0[2];
+ u32 userintraw;
+ u32 userintmasked;
+ u32 userintmaskset;
+ u32 userintmaskclr;
+ u32 __reserved_1[20];
+
+ struct {
+ u32 access;
+ u32 physel;
+#define USERACCESS_GO (1 << 31)
+#define USERACCESS_WRITE (1 << 30)
+#define USERACCESS_ACK (1 << 29)
+#define USERACCESS_READ (0)
+#define USERACCESS_DATA (0xffff)
+ } user[0];
+};
+
+struct cpsw_regs {
+ u32 id_ver;
+ u32 control;
+ u32 soft_reset;
+ u32 stat_port_en;
+ u32 ptype;
+};
+
+struct cpsw_slave_regs {
+ u32 max_blks;
+ u32 blk_cnt;
+ u32 flow_thresh;
+ u32 port_vlan;
+ u32 tx_pri_map;
+ u32 sa_lo;
+ u32 sa_hi;
+};
+
+struct cpsw_host_regs {
+ u32 max_blks;
+ u32 blk_cnt;
+ u32 flow_thresh;
+ u32 port_vlan;
+ u32 tx_pri_map;
+ u32 cpdma_tx_pri_map;
+ u32 cpdma_rx_chan_map;
+};
+
+struct cpsw_sliver_regs {
+ u32 id_ver;
+ u32 mac_control;
+ u32 mac_status;
+ u32 soft_reset;
+ u32 rx_maxlen;
+ u32 __reserved_0;
+ u32 rx_pause;
+ u32 tx_pause;
+ u32 __reserved_1;
+ u32 rx_pri_map;
+};
+
+#define ALE_ENTRY_BITS 68
+#define ALE_ENTRY_WORDS DIV_ROUND_UP(ALE_ENTRY_BITS, 32)
+
+/* ALE Registers */
+#define ALE_CONTROL 0x08
+#define ALE_UNKNOWNVLAN 0x18
+#define ALE_TABLE_CONTROL 0x20
+#define ALE_TABLE 0x34
+#define ALE_PORTCTL 0x40
+
+#define ALE_TABLE_WRITE BIT(31)
+
+#define ALE_TYPE_FREE 0
+#define ALE_TYPE_ADDR 1
+#define ALE_TYPE_VLAN 2
+#define ALE_TYPE_VLAN_ADDR 3
+
+#define ALE_UCAST_PERSISTANT 0
+#define ALE_UCAST_UNTOUCHED 1
+#define ALE_UCAST_OUI 2
+#define ALE_UCAST_TOUCHED 3
+
+#define ALE_MCAST_FWD 0
+#define ALE_MCAST_BLOCK_LEARN_FWD 1
+#define ALE_MCAST_FWD_LEARN 2
+#define ALE_MCAST_FWD_2 3
+
+enum cpsw_ale_port_state {
+ ALE_PORT_STATE_DISABLE = 0x00,
+ ALE_PORT_STATE_BLOCK = 0x01,
+ ALE_PORT_STATE_LEARN = 0x02,
+ ALE_PORT_STATE_FORWARD = 0x03,
+};
+
+/* ALE unicast entry flags - passed into cpsw_ale_add_ucast() */
+#define ALE_SECURE 1
+#define ALE_BLOCKED 2
+
+struct cpsw_slave {
+ struct cpsw_slave_regs *regs;
+ struct cpsw_sliver_regs *sliver;
+ int slave_num;
+ u32 mac_control;
+ struct cpsw_slave_data *data;
+};
+
+struct cpdma_desc {
+ /* hardware fields */
+ u32 hw_next;
+ u32 hw_buffer;
+ u32 hw_len;
+ u32 hw_mode;
+ /* software fields */
+ u32 sw_buffer;
+ u32 sw_len;
+};
+
+struct cpdma_chan {
+ struct cpdma_desc *head, *tail;
+ void *hdp, *cp, *rxfree;
+};
+
+struct cpsw_priv {
+ struct device_d *dev;
+ struct eth_device edev;
+ struct mii_bus miibus;
+
+ u32 version;
+ struct cpsw_platform_data data;
+ int host_port;
+ uint8_t mac_addr[6];
+
+ struct cpsw_regs *regs;
+ struct cpsw_mdio_regs *mdio_regs;
+ void *dma_regs;
+ struct cpsw_host_regs *host_port_regs;
+ void *ale_regs;
+ void *state_ram;
+
+ unsigned int ale_entries;
+ unsigned int num_slaves;
+ unsigned int channels;
+ unsigned int slave_ofs;
+ unsigned int slave_size;
+ unsigned int sliver_ofs;
+
+ struct cpdma_desc *descs;
+ struct cpdma_desc *desc_free;
+ struct cpdma_chan rx_chan, tx_chan;
+
+ struct cpsw_slave *slaves;
+#define for_each_slave(priv, func, arg...) \
+ do { \
+ int idx; \
+ for (idx = 0; idx < (priv)->num_slaves; idx++) \
+ (func)((priv)->slaves + idx, ##arg); \
+ } while (0)
+};
+
+static int cpsw_ale_get_field(u32 *ale_entry, u32 start, u32 bits)
+{
+ int idx;
+
+ idx = start / 32;
+ start -= idx * 32;
+ idx = 2 - idx; /* flip */
+
+ return (ale_entry[idx] >> start) & BITMASK(bits);
+}
+
+static void cpsw_ale_set_field(u32 *ale_entry, u32 start, u32 bits,
+ u32 value)
+{
+ int idx;
+
+ value &= BITMASK(bits);
+ idx = start / 32;
+ start -= idx * 32;
+ idx = 2 - idx; /* flip */
+ ale_entry[idx] &= ~(BITMASK(bits) << start);
+ ale_entry[idx] |= (value << start);
+}
+
+#define DEFINE_ALE_FIELD(name, start, bits) \
+static inline int cpsw_ale_get_##name(u32 *ale_entry) \
+{ \
+ return cpsw_ale_get_field(ale_entry, start, bits); \
+} \
+static inline void cpsw_ale_set_##name(u32 *ale_entry, u32 value) \
+{ \
+ cpsw_ale_set_field(ale_entry, start, bits, value); \
+}
+
+DEFINE_ALE_FIELD(entry_type, 60, 2)
+DEFINE_ALE_FIELD(mcast_state, 62, 2)
+DEFINE_ALE_FIELD(port_mask, 66, 3)
+DEFINE_ALE_FIELD(ucast_type, 62, 2)
+DEFINE_ALE_FIELD(port_num, 66, 2)
+DEFINE_ALE_FIELD(blocked, 65, 1)
+DEFINE_ALE_FIELD(secure, 64, 1)
+DEFINE_ALE_FIELD(mcast, 40, 1)
+
+static char ethbdaddr[6] = { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff };
+
+/* The MAC address field in the ALE entry cannot be macroized as above */
+static void cpsw_ale_get_addr(u32 *ale_entry, u8 *addr)
+{
+ int i;
+
+ for (i = 0; i < 6; i++)
+ addr[i] = cpsw_ale_get_field(ale_entry, 40 - 8*i, 8);
+}
+
+static void cpsw_ale_set_addr(u32 *ale_entry, u8 *addr)
+{
+ int i;
+
+ for (i = 0; i < 6; i++)
+ cpsw_ale_set_field(ale_entry, 40 - 8*i, 8, addr[i]);
+}
+
+static int cpsw_ale_read(struct cpsw_priv *priv, int idx, u32 *ale_entry)
+{
+ int i;
+
+ writel(idx, priv->ale_regs + ALE_TABLE_CONTROL);
+
+ for (i = 0; i < ALE_ENTRY_WORDS; i++)
+ ale_entry[i] = readl(priv->ale_regs + ALE_TABLE + 4 * i);
+
+ return idx;
+}
+
+static int cpsw_ale_write(struct cpsw_priv *priv, int idx, u32 *ale_entry)
+{
+ int i;
+
+ for (i = 0; i < ALE_ENTRY_WORDS; i++)
+ writel(ale_entry[i], priv->ale_regs + ALE_TABLE + 4 * i);
+
+ writel(idx | ALE_TABLE_WRITE, priv->ale_regs + ALE_TABLE_CONTROL);
+
+ return idx;
+}
+
+static int cpsw_ale_match_addr(struct cpsw_priv *priv, u8* addr)
+{
+ u32 ale_entry[ALE_ENTRY_WORDS];
+ int type, idx;
+
+ for (idx = 0; idx < priv->ale_entries; idx++) {
+ u8 entry_addr[6];
+
+ cpsw_ale_read(priv, idx, ale_entry);
+ type = cpsw_ale_get_entry_type(ale_entry);
+
+ if (type != ALE_TYPE_ADDR && type != ALE_TYPE_VLAN_ADDR)
+ continue;
+
+ cpsw_ale_get_addr(ale_entry, entry_addr);
+
+ if (memcmp(entry_addr, addr, 6) == 0)
+ return idx;
+ }
+
+ return -ENOENT;
+}
+
+static int cpsw_ale_match_free(struct cpsw_priv *priv)
+{
+ u32 ale_entry[ALE_ENTRY_WORDS];
+ int type, idx;
+
+ for (idx = 0; idx < priv->ale_entries; idx++) {
+ cpsw_ale_read(priv, idx, ale_entry);
+ type = cpsw_ale_get_entry_type(ale_entry);
+
+ if (type == ALE_TYPE_FREE)
+ return idx;
+ }
+
+ return -ENOENT;
+}
+
+static int cpsw_ale_find_ageable(struct cpsw_priv *priv)
+{
+ u32 ale_entry[ALE_ENTRY_WORDS];
+ int type, idx;
+
+ for (idx = 0; idx < priv->ale_entries; idx++) {
+ cpsw_ale_read(priv, idx, ale_entry);
+ type = cpsw_ale_get_entry_type(ale_entry);
+
+ if (type != ALE_TYPE_ADDR && type != ALE_TYPE_VLAN_ADDR)
+ continue;
+
+ if (cpsw_ale_get_mcast(ale_entry))
+ continue;
+
+ type = cpsw_ale_get_ucast_type(ale_entry);
+
+ if (type != ALE_UCAST_PERSISTANT &&
+ type != ALE_UCAST_OUI)
+ return idx;
+ }
+
+ return -ENOENT;
+}
+
+static int cpsw_ale_add_ucast(struct cpsw_priv *priv, u8 *addr,
+ int port, int flags)
+{
+ u32 ale_entry[ALE_ENTRY_WORDS] = {0, 0, 0};
+ int idx;
+
+ cpsw_ale_set_entry_type(ale_entry, ALE_TYPE_ADDR);
+ cpsw_ale_set_addr(ale_entry, addr);
+ cpsw_ale_set_ucast_type(ale_entry, ALE_UCAST_PERSISTANT);
+ cpsw_ale_set_secure(ale_entry, (flags & ALE_SECURE) ? 1 : 0);
+ cpsw_ale_set_blocked(ale_entry, (flags & ALE_BLOCKED) ? 1 : 0);
+ cpsw_ale_set_port_num(ale_entry, port);
+
+ idx = cpsw_ale_match_addr(priv, addr);
+ if (idx < 0)
+ idx = cpsw_ale_match_free(priv);
+ if (idx < 0)
+ idx = cpsw_ale_find_ageable(priv);
+ if (idx < 0)
+ return -ENOMEM;
+
+ cpsw_ale_write(priv, idx, ale_entry);
+ return 0;
+}
+
+static int cpsw_ale_add_mcast(struct cpsw_priv *priv, u8 *addr, int port_mask)
+{
+ u32 ale_entry[ALE_ENTRY_WORDS] = {0, 0, 0};
+ int idx, mask;
+
+ idx = cpsw_ale_match_addr(priv, addr);
+ if (idx >= 0)
+ cpsw_ale_read(priv, idx, ale_entry);
+
+ cpsw_ale_set_entry_type(ale_entry, ALE_TYPE_ADDR);
+ cpsw_ale_set_addr(ale_entry, addr);
+ cpsw_ale_set_mcast_state(ale_entry, ALE_MCAST_FWD_2);
+
+ mask = cpsw_ale_get_port_mask(ale_entry);
+ port_mask |= mask;
+ cpsw_ale_set_port_mask(ale_entry, port_mask);
+
+ if (idx < 0)
+ idx = cpsw_ale_match_free(priv);
+ if (idx < 0)
+ idx = cpsw_ale_find_ageable(priv);
+ if (idx < 0)
+ return -ENOMEM;
+
+ cpsw_ale_write(priv, idx, ale_entry);
+ return 0;
+}
+
+static inline void cpsw_ale_control(struct cpsw_priv *priv, int bit, int val)
+{
+ u32 tmp, mask = BIT(bit);
+
+ tmp = readl(priv->ale_regs + ALE_CONTROL);
+ tmp &= ~mask;
+ tmp |= val ? mask : 0;
+ writel(tmp, priv->ale_regs + ALE_CONTROL);
+}
+
+#define cpsw_ale_enable(priv, val) cpsw_ale_control(priv, 31, val)
+#define cpsw_ale_clear(priv, val) cpsw_ale_control(priv, 30, val)
+#define cpsw_ale_bypass(priv, val) cpsw_ale_control(priv, 4, val)
+#define cpsw_ale_vlan_aware(priv, val) cpsw_ale_control(priv, 2, val)
+
+static inline void cpsw_ale_port_state(struct cpsw_priv *priv, int port,
+ int val)
+{
+ int offset = ALE_PORTCTL + 4 * port;
+ u32 tmp, mask = 0x3;
+
+ tmp = readl(priv->ale_regs + offset);
+ tmp &= ~mask;
+ tmp |= val & 0x3;
+ writel(tmp, priv->ale_regs + offset);
+}
+
+/* wait until hardware is ready for another user access */
+static u32 wait_for_user_access(struct cpsw_priv *priv)
+{
+ struct cpsw_mdio_regs *mdio_regs = priv->mdio_regs;
+ u32 tmp;
+ uint64_t start = get_time_ns();
+
+ do {
+ tmp = readl(&mdio_regs->user[0].access);
+
+ if (!(tmp & USERACCESS_GO))
+ break;
+
+ if (is_timeout(start, 100 * MSECOND)) {
+ dev_err(priv->dev, "timeout waiting for user access\n");
+ break;
+ }
+ } while (1);
+
+ return tmp;
+}
+
+static int cpsw_mdio_read(struct mii_bus *bus, int phy_id, int phy_reg)
+{
+ struct cpsw_priv *priv = bus->priv;
+ struct cpsw_mdio_regs *mdio_regs = priv->mdio_regs;
+
+ u32 tmp;
+
+ if (phy_reg & ~PHY_REG_MASK || phy_id & ~PHY_ID_MASK)
+ return -EINVAL;
+
+ wait_for_user_access(priv);
+
+ tmp = (USERACCESS_GO | USERACCESS_READ | (phy_reg << 21) |
+ (phy_id << 16));
+ writel(tmp, &mdio_regs->user[0].access);
+
+ tmp = wait_for_user_access(priv);
+
+ return (tmp & USERACCESS_ACK) ? (tmp & USERACCESS_DATA) : -1;
+}
+
+static int cpsw_mdio_write(struct mii_bus *bus, int phy_id, int phy_reg, u16 value)
+{
+ struct cpsw_priv *priv = bus->priv;
+ struct cpsw_mdio_regs *mdio_regs = priv->mdio_regs;
+ u32 tmp;
+
+ if (phy_reg & ~PHY_REG_MASK || phy_id & ~PHY_ID_MASK)
+ return -EINVAL;
+
+ wait_for_user_access(priv);
+ tmp = (USERACCESS_GO | USERACCESS_WRITE | (phy_reg << 21) |
+ (phy_id << 16) | (value & USERACCESS_DATA));
+ writel(tmp, &mdio_regs->user[0].access);
+ wait_for_user_access(priv);
+
+ return 0;
+}
+
+static inline void soft_reset(struct cpsw_priv *priv, void *reg)
+{
+ int ret;
+
+ writel(1, reg);
+
+ ret = wait_on_timeout(100 * MSECOND, (readl(reg) & 1) == 0);
+ if (ret)
+ dev_err(priv->dev, "reset timeout\n");
+}
+
+#define mac_hi(mac) (((mac)[0] << 0) | ((mac)[1] << 8) | \
+ ((mac)[2] << 16) | ((mac)[3] << 24))
+#define mac_lo(mac) (((mac)[4] << 0) | ((mac)[5] << 8))
+
+static void cpsw_set_slave_mac(struct cpsw_slave *slave,
+ struct cpsw_priv *priv,
+ unsigned char *mac)
+{
+ dev_dbg(priv->dev, "* %s\n", __func__);
+
+ writel(mac_hi(mac), &slave->regs->sa_hi);
+ writel(mac_lo(mac), &slave->regs->sa_lo);
+}
+
+static int cpsw_get_hwaddr(struct eth_device *edev, unsigned char *mac)
+{
+ struct cpsw_priv *priv = edev->priv;
+
+ dev_dbg(priv->dev, "* %s\n", __func__);
+
+ return -1;
+}
+
+static int cpsw_set_hwaddr(struct eth_device *edev, unsigned char *mac)
+{
+ struct cpsw_priv *priv = edev->priv;
+
+ dev_dbg(priv->dev, "* %s\n", __func__);
+
+ memcpy(&priv->mac_addr, mac, sizeof(priv->mac_addr));
+
+ for_each_slave(priv, cpsw_set_slave_mac, priv, mac);
+
+ return 0;
+}
+
+static void cpsw_slave_update_link(struct cpsw_slave *slave,
+ struct cpsw_priv *priv, int *link)
+{
+ struct phy_device *phydev = priv->edev.phydev;
+ u32 mac_control = 0;
+
+ dev_dbg(priv->dev, "* %s\n", __func__);
+
+ if (!phydev)
+ return;
+
+ if (slave->slave_num)
+ return;
+
+ if (phydev->link) {
+ *link = 1;
+ mac_control = BIT(5); /* MIIEN */
+ if (phydev->speed == SPEED_10)
+ mac_control |= BIT(18); /* In Band mode */
+ else if (phydev->speed == SPEED_100)
+ mac_control |= BIT(15);
+ else if (phydev->speed == SPEED_1000)
+ mac_control &= ~BIT(7); /* TODO: Do not enable
+ * gig support now */
+ if (phydev->duplex == DUPLEX_FULL)
+ mac_control |= BIT(0); /* FULLDUPLEXEN */
+ }
+
+ if (mac_control == slave->mac_control)
+ return;
+
+ if (mac_control) {
+ dev_dbg(priv->dev, "link up on port %d, speed %d, %s duplex\n",
+ slave->slave_num, phydev->speed,
+ (phydev->duplex == DUPLEX_FULL) ? "full" : "half");
+ } else {
+ dev_dbg(priv->dev, "link down on port %d\n", slave->slave_num);
+ }
+
+ writel(mac_control, &slave->sliver->mac_control);
+ slave->mac_control = mac_control;
+}
+
+static int cpsw_update_link(struct cpsw_priv *priv)
+{
+ int link = 0;
+
+ dev_dbg(priv->dev, "* %s\n", __func__);
+
+ for_each_slave(priv, cpsw_slave_update_link, priv, &link);
+ return link;
+}
+
+static void cpsw_adjust_link(struct eth_device *edev) {
+ struct cpsw_priv *priv = edev->priv;
+
+ dev_dbg(priv->dev, "* %s\n", __func__);
+
+ cpsw_update_link(priv);
+}
+
+static inline u32 cpsw_get_slave_port(struct cpsw_priv *priv, u32 slave_num)
+{
+ if (priv->host_port == 0)
+ return slave_num + 1;
+ else
+ return slave_num;
+}
+
+static void cpsw_slave_init(struct cpsw_slave *slave, struct cpsw_priv *priv)
+{
+ u32 slave_port;
+
+ dev_dbg(priv->dev, "* %s\n", __func__);
+
+ soft_reset(priv, &slave->sliver->soft_reset);
+
+ /* setup priority mapping */
+ writel(0x76543210, &slave->sliver->rx_pri_map);
+ writel(0x33221100, &slave->regs->tx_pri_map);
+
+ /* setup max packet size, and mac address */
+ writel(PKT_MAX, &slave->sliver->rx_maxlen);
+
+ slave->mac_control = 0; /* no link yet */
+
+ /* enable forwarding */
+ slave_port = cpsw_get_slave_port(priv, slave->slave_num);
+ cpsw_ale_port_state(priv, slave_port, ALE_PORT_STATE_FORWARD);
+
+ /* add broadcast address */
+ cpsw_ale_add_mcast(priv, ethbdaddr, 1 << slave_port);
+}
+
+static struct cpdma_desc *cpdma_desc_alloc(struct cpsw_priv *priv)
+{
+ struct cpdma_desc *desc = priv->desc_free;
+
+ if (desc)
+ priv->desc_free = (void *)readl(&desc->hw_next);
+
+ return desc;
+}
+
+static void cpdma_desc_free(struct cpsw_priv *priv, struct cpdma_desc *desc)
+{
+ dev_dbg(priv->dev, "%s: free desc=0x%p\n", __func__, desc);
+
+ if (desc) {
+ writel((u32)priv->desc_free, &desc->hw_next);
+ priv->desc_free = desc;
+ }
+}
+
+static int cpdma_submit(struct cpsw_priv *priv, struct cpdma_chan *chan,
+ void *buffer, int len)
+{
+ struct cpdma_desc *desc, *prev;
+ u32 mode;
+
+ desc = cpdma_desc_alloc(priv);
+ if (!desc)
+ return -ENOMEM;
+
+ if (len < PKT_MIN)
+ len = PKT_MIN;
+
+ mode = CPDMA_DESC_OWNER | CPDMA_DESC_SOP | CPDMA_DESC_EOP;
+
+ writel(0, &desc->hw_next);
+ writel((u32)buffer, &desc->hw_buffer);
+ writel(len, &desc->hw_len);
+ writel(mode | len, &desc->hw_mode);
+ writel((u32)buffer, &desc->sw_buffer);
+ writel((u32)len, &desc->sw_len);
+
+ if (!chan->head) {
+ /* simple case - first packet enqueued */
+ chan->head = desc;
+ chan->tail = desc;
+ writel((u32)desc, chan->hdp);
+ goto done;
+ }
+
+ /* not the first packet - enqueue at the tail */
+ prev = chan->tail;
+ writel((u32)desc, &prev->hw_next);
+ chan->tail = desc;
+
+ /* next check if EOQ has been triggered already */
+ if (readl(&prev->hw_mode) & CPDMA_DESC_EOQ)
+ writel((u32)desc, chan->hdp);
+
+done:
+ if (chan->rxfree)
+ writel(1, chan->rxfree);
+ return 0;
+}
+
+static int cpdma_process(struct cpsw_priv *priv, struct cpdma_chan *chan,
+ void **buffer, int *len)
+{
+ struct cpdma_desc *desc = chan->head;
+ u32 status;
+
+ if (!desc)
+ return -ENOENT;
+
+ status = readl(&desc->hw_mode);
+
+ if (len)
+ *len = status & 0x7ff;
+
+ if (buffer)
+ *buffer = (void *)readl(&desc->sw_buffer);
+
+ if (status & CPDMA_DESC_OWNER)
+ return -EBUSY;
+
+ chan->head = (void *)readl(&desc->hw_next);
+
+ writel((u32)desc, chan->cp);
+
+ cpdma_desc_free(priv, desc);
+
+ return 0;
+}
+
+static int cpsw_init(struct eth_device *edev)
+{
+ return 0;
+}
+
+static int cpsw_open(struct eth_device *edev)
+{
+ struct cpsw_priv *priv = edev->priv;
+ struct cpsw_slave_data *slave_data = priv->data.slave_data;
+ int i, ret;
+
+ dev_dbg(priv->dev, "* %s\n", __func__);
+
+ ret = phy_device_connect(edev, &priv->miibus, slave_data[0].phy_id,
+ cpsw_adjust_link, 0, slave_data[0].phy_if);
+ if (ret)
+ return ret;
+
+ /* soft reset the controller and initialize priv */
+ soft_reset(priv, &priv->regs->soft_reset);
+
+ /* initialize and reset the address lookup engine */
+ cpsw_ale_enable(priv, 1);
+ cpsw_ale_clear(priv, 1);
+ cpsw_ale_bypass(priv, 0);
+ cpsw_ale_vlan_aware(priv, 0); /* vlan unaware mode */
+
+ /* setup host port priority mapping */
+ writel(0x76543210, &priv->host_port_regs->cpdma_tx_pri_map);
+ writel(0, &priv->host_port_regs->cpdma_rx_chan_map);
+
+ /* disable priority elevation and enable statistics on all ports */
+ writel(0, &priv->regs->ptype);
+
+ /* enable statistics collection only on the host port */
+ writel(BIT(priv->host_port), &priv->regs->stat_port_en);
+
+ cpsw_ale_port_state(priv, priv->host_port, ALE_PORT_STATE_FORWARD);
+
+ cpsw_ale_add_ucast(priv, priv->mac_addr, priv->host_port,
+ ALE_SECURE);
+ cpsw_ale_add_mcast(priv, ethbdaddr, 1 << priv->host_port);
+
+ for_each_slave(priv, cpsw_slave_init, priv);
+
+ cpsw_update_link(priv);
+
+ /* init descriptor pool */
+ for (i = 0; i < NUM_DESCS; i++) {
+ u32 val = (i == (NUM_DESCS - 1)) ? 0 : (u32)&priv->descs[i + 1];
+
+ writel(val, &priv->descs[i].hw_next);
+ }
+
+ priv->desc_free = &priv->descs[0];
+
+ /* initialize channels */
+ memset(&priv->rx_chan, 0, sizeof(struct cpdma_chan));
+ priv->rx_chan.hdp = priv->state_ram + STATERAM_RXHDP;
+ priv->rx_chan.cp = priv->state_ram + STATERAM_RXCP;
+ priv->rx_chan.rxfree = priv->dma_regs + CPDMA_RXFREE;
+
+ memset(&priv->tx_chan, 0, sizeof(struct cpdma_chan));
+ priv->tx_chan.hdp = priv->state_ram + STATERAM_TXHDP;
+ priv->tx_chan.cp = priv->state_ram + STATERAM_TXCP;
+
+ /* clear dma state */
+ soft_reset(priv, priv->dma_regs + CPDMA_SOFTRESET);
+
+ for (i = 0; i < priv->channels; i++) {
+ writel(0, priv->state_ram + STATERAM_RXHDP + 4 * i);
+ writel(0, priv->dma_regs + CPDMA_RXFREE + 4 * i);
+ writel(0, priv->state_ram + STATERAM_RXCP + 4 * i);
+ writel(0, priv->state_ram + STATERAM_TXHDP + 4 * i);
+ writel(0, priv->state_ram + STATERAM_TXCP + 4 * i);
+ }
+
+ writel(1, priv->dma_regs + CPDMA_TXCONTROL);
+ writel(1, priv->dma_regs + CPDMA_RXCONTROL);
+
+ /* submit rx descs */
+ for (i = 0; i < PKTBUFSRX - 2; i++) {
+ ret = cpdma_submit(priv, &priv->rx_chan, NetRxPackets[i],
+ PKTSIZE);
+ if (ret < 0) {
+ dev_err(priv->dev, "error %d submitting rx desc\n", ret);
+ break;
+ }
+ }
+
+ return 0;
+}
+
+static void cpsw_halt(struct eth_device *dev)
+{
+ struct cpsw_priv *priv = dev->priv;
+
+ writel(0, priv->dma_regs + CPDMA_TXCONTROL);
+ writel(0, priv->dma_regs + CPDMA_RXCONTROL);
+
+ /* soft reset the controller */
+ soft_reset(priv, &priv->regs->soft_reset);
+
+ /* clear dma state */
+ soft_reset(priv, priv->dma_regs + CPDMA_SOFTRESET);
+}
+
+static int cpsw_send(struct eth_device *dev, void *packet, int length)
+{
+ struct cpsw_priv *priv = dev->priv;
+ void *buffer;
+ int ret, len;
+
+ dev_dbg(priv->dev, "* %s\n", __func__);
+
+ /* first reap completed packets */
+ while (cpdma_process(priv, &priv->tx_chan, &buffer, &len) >= 0);
+
+ dev_dbg(priv->dev, "%s: %i bytes @ 0x%p\n", __func__, length, packet);
+
+ dma_flush_range((ulong) packet, (ulong)packet + length);
+
+ ret = cpdma_submit(priv, &priv->tx_chan, packet, length);
+
+ return ret;
+}
+
+static int cpsw_recv(struct eth_device *dev)
+{
+ struct cpsw_priv *priv = dev->priv;
+ void *buffer;
+ int len;
+
+ while (cpdma_process(priv, &priv->rx_chan, &buffer, &len) >= 0) {
+ dma_inv_range((ulong)buffer, (ulong)buffer + len);
+ net_receive(buffer, len);
+ cpdma_submit(priv, &priv->rx_chan, buffer, PKTSIZE);
+ }
+
+ return 0;
+}
+
+static void cpsw_slave_setup(struct cpsw_slave *slave, int slave_num,
+ struct cpsw_priv *priv)
+{
+ void *regs = priv->regs;
+ struct cpsw_slave_data *data = priv->data.slave_data + slave_num;
+
+ dev_dbg(priv->dev, "* %s\n", __func__);
+
+ slave->slave_num = slave_num;
+ slave->data = data;
+ slave->regs = regs + priv->slave_ofs + priv->slave_size * slave_num;
+ slave->sliver = regs + priv->sliver_ofs + SLIVER_SIZE * slave_num;
+}
+
+struct cpsw_data {
+ unsigned int host_port_reg_ofs;
+ unsigned int cpdma_reg_ofs;
+ unsigned int ale_reg_ofs;
+ unsigned int state_ram_ofs;
+ unsigned int slave_ofs;
+ unsigned int slave_size;
+ unsigned int sliver_ofs;
+ unsigned int mdio_reg_ofs;
+ unsigned int cppi_ram_ofs;
+};
+
+static struct cpsw_data cpsw1_data = {
+ .host_port_reg_ofs = 0x028,
+ .cpdma_reg_ofs = 0x100,
+ .state_ram_ofs = 0x200,
+ .ale_reg_ofs = 0x600,
+ .slave_ofs = 0x050,
+ .slave_size = 0x040,
+ .sliver_ofs = 0x700,
+ /* FIXME: mdio_reg_ofs and cppi_ram_ofs missing */
+};
+
+static struct cpsw_data cpsw2_data = {
+ .host_port_reg_ofs = 0x108,
+ .cpdma_reg_ofs = 0x800,
+ .state_ram_ofs = 0xa00,
+ .ale_reg_ofs = 0xd00,
+ .slave_ofs = 0x200,
+ .slave_size = 0x100,
+ .sliver_ofs = 0xd80,
+ .mdio_reg_ofs = 0x1000,
+ .cppi_ram_ofs = 0x2000,
+};
+
+int cpsw_probe(struct device_d *dev)
+{
+ struct cpsw_platform_data *data = (struct cpsw_platform_data *)dev->platform_data;
+ struct cpsw_priv *priv;
+ void __iomem *regs;
+ struct eth_device *edev;
+ uint64_t start;
+ uint32_t phy_mask;
+ struct cpsw_data *cpsw_data;
+
+ dev_dbg(dev, "* %s\n", __func__);
+
+ regs = dev_request_mem_region(dev, 0);
+
+ priv = xzalloc(sizeof(*priv));
+ priv->dev = dev;
+ priv->data = *data;
+ priv->channels = 8;
+ priv->num_slaves = data->num_slaves;
+ priv->ale_entries = 1024;
+ edev = &priv->edev;
+
+ priv->slaves = xzalloc(sizeof(struct cpsw_slave) * priv->num_slaves);
+
+ priv->host_port = 0;
+ priv->regs = regs;
+
+ priv->version = readl(&priv->regs->id_ver);
+
+ switch (priv->version) {
+ case CPSW_VERSION_1:
+ cpsw_data = &cpsw1_data;
+ break;
+ case CPSW_VERSION_2:
+ cpsw_data = &cpsw2_data;
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ priv->descs = regs + cpsw_data->cppi_ram_ofs;
+ priv->host_port_regs = regs + cpsw_data->host_port_reg_ofs;
+ priv->dma_regs = regs + cpsw_data->cpdma_reg_ofs;
+ priv->ale_regs = regs + cpsw_data->ale_reg_ofs;
+ priv->state_ram = regs + cpsw_data->state_ram_ofs;
+ priv->mdio_regs = regs + cpsw_data->mdio_reg_ofs;
+
+ priv->slave_ofs = cpsw_data->slave_ofs;
+ priv->slave_size = cpsw_data->slave_size;
+ priv->sliver_ofs = cpsw_data->sliver_ofs;
+
+ for_each_slave(priv, cpsw_slave_setup, idx, priv);
+
+ edev->priv = priv;
+ edev->init = cpsw_init;
+ edev->open = cpsw_open;
+ edev->halt = cpsw_halt;
+ edev->send = cpsw_send;
+ edev->recv = cpsw_recv;
+ edev->get_ethaddr = cpsw_get_hwaddr;
+ edev->set_ethaddr = cpsw_set_hwaddr;
+ edev->parent = dev;
+
+ priv->miibus.read = cpsw_mdio_read;
+ priv->miibus.write = cpsw_mdio_write;
+ priv->miibus.priv = priv;
+ priv->miibus.parent = dev;
+
+ /*
+ * set enable and clock divider
+ *
+ * FIXME: Use a clock to calculate the divider
+ */
+ writel(0xff | CONTROL_ENABLE, &priv->mdio_regs->control);
+
+ /*
+ * wait for scan logic to settle:
+ * the scan time consists of (a) a large fixed component, and (b) a
+ * small component that varies with the mii bus frequency. These
+ * were estimated using measurements at 1.1 and 2.2 MHz on tnetv107x
+ * silicon. Since the effect of (b) was found to be largely
+ * negligible, we keep things simple here.
+ */
+ udelay(1000);
+
+ start = get_time_ns();
+ while (1) {
+ phy_mask = readl(&priv->mdio_regs->alive);
+ if (phy_mask) {
+ dev_info(dev, "detected phy mask 0x%x\n", phy_mask);
+ phy_mask = ~phy_mask;
+ break;
+ }
+ if (is_timeout(start, 256 * MSECOND)) {
+ dev_err(dev, "no live phy, scanning all\n");
+ phy_mask = 0;
+ break;
+ }
+ }
+
+ priv->miibus.phy_mask = phy_mask;
+
+ mdiobus_register(&priv->miibus);
+
+ eth_register(edev);
+
+ return 0;
+}
+
+static struct driver_d cpsw_driver = {
+ .name = "cpsw",
+ .probe = cpsw_probe,
+};
+
+static int cpsw_register(void)
+{
+ return platform_driver_register(&cpsw_driver);
+}
+
+device_initcall(cpsw_register);
--
1.7.10.4
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