diff options
Diffstat (limited to 'drivers/net/dsa/mv88e6352.c')
| -rw-r--r-- | drivers/net/dsa/mv88e6352.c | 788 |
1 files changed, 788 insertions, 0 deletions
diff --git a/drivers/net/dsa/mv88e6352.c b/drivers/net/dsa/mv88e6352.c new file mode 100644 index 00000000000..258d9ef5ef2 --- /dev/null +++ b/drivers/net/dsa/mv88e6352.c @@ -0,0 +1,788 @@ +/* + * net/dsa/mv88e6352.c - Marvell 88e6352 switch chip support + * + * Copyright (c) 2014 Guenter Roeck + * + * Derived from mv88e6123_61_65.c + * Copyright (c) 2008-2009 Marvell Semiconductor + * + * 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/delay.h> +#include <linux/jiffies.h> +#include <linux/list.h> +#include <linux/module.h> +#include <linux/netdevice.h> +#include <linux/platform_device.h> +#include <linux/phy.h> +#include <net/dsa.h> +#include "mv88e6xxx.h" + +static int mv88e6352_wait(struct dsa_switch *ds, int reg, u16 mask) +{ + unsigned long timeout = jiffies + HZ / 10; + + while (time_before(jiffies, timeout)) { + int ret; + + ret = REG_READ(REG_GLOBAL2, reg); + if (ret < 0) + return ret; + + if (!(ret & mask)) + return 0; + + usleep_range(1000, 2000); + } + return -ETIMEDOUT; +} + +static inline int mv88e6352_phy_wait(struct dsa_switch *ds) +{ + return mv88e6352_wait(ds, 0x18, 0x8000); +} + +static inline int mv88e6352_eeprom_load_wait(struct dsa_switch *ds) +{ + return mv88e6352_wait(ds, 0x14, 0x0800); +} + +static inline int mv88e6352_eeprom_busy_wait(struct dsa_switch *ds) +{ + return mv88e6352_wait(ds, 0x14, 0x8000); +} + +static int __mv88e6352_phy_read(struct dsa_switch *ds, int addr, int regnum) +{ + int ret; + + REG_WRITE(REG_GLOBAL2, 0x18, 0x9800 | (addr << 5) | regnum); + + ret = mv88e6352_phy_wait(ds); + if (ret < 0) + return ret; + + return REG_READ(REG_GLOBAL2, 0x19); +} + +static int __mv88e6352_phy_write(struct dsa_switch *ds, int addr, int regnum, + u16 val) +{ + REG_WRITE(REG_GLOBAL2, 0x19, val); + REG_WRITE(REG_GLOBAL2, 0x18, 0x9400 | (addr << 5) | regnum); + + return mv88e6352_phy_wait(ds); +} + +static char *mv88e6352_probe(struct device *host_dev, int sw_addr) +{ + struct mii_bus *bus = dsa_host_dev_to_mii_bus(host_dev); + int ret; + + if (bus == NULL) + return NULL; + + ret = __mv88e6xxx_reg_read(bus, sw_addr, REG_PORT(0), 0x03); + if (ret >= 0) { + if ((ret & 0xfff0) == 0x1760) + return "Marvell 88E6176"; + if (ret == 0x3521) + return "Marvell 88E6352 (A0)"; + if (ret == 0x3522) + return "Marvell 88E6352 (A1)"; + if ((ret & 0xfff0) == 0x3520) + return "Marvell 88E6352"; + } + + return NULL; +} + +static int mv88e6352_switch_reset(struct dsa_switch *ds) +{ + unsigned long timeout; + int ret; + int i; + + /* Set all ports to the disabled state. */ + for (i = 0; i < 7; i++) { + ret = REG_READ(REG_PORT(i), 0x04); + REG_WRITE(REG_PORT(i), 0x04, ret & 0xfffc); + } + + /* Wait for transmit queues to drain. */ + usleep_range(2000, 4000); + + /* Reset the switch. Keep PPU active (bit 14, undocumented). + * The PPU needs to be active to support indirect phy register + * accesses through global registers 0x18 and 0x19. + */ + REG_WRITE(REG_GLOBAL, 0x04, 0xc000); + + /* Wait up to one second for reset to complete. */ + timeout = jiffies + 1 * HZ; + while (time_before(jiffies, timeout)) { + ret = REG_READ(REG_GLOBAL, 0x00); + if ((ret & 0x8800) == 0x8800) + break; + usleep_range(1000, 2000); + } + if (time_after(jiffies, timeout)) + return -ETIMEDOUT; + + return 0; +} + +static int mv88e6352_setup_global(struct dsa_switch *ds) +{ + int ret; + int i; + + /* Discard packets with excessive collisions, + * mask all interrupt sources, enable PPU (bit 14, undocumented). + */ + REG_WRITE(REG_GLOBAL, 0x04, 0x6000); + + /* Set the default address aging time to 5 minutes, and + * enable address learn messages to be sent to all message + * ports. + */ + REG_WRITE(REG_GLOBAL, 0x0a, 0x0148); + + /* Configure the priority mapping registers. */ + ret = mv88e6xxx_config_prio(ds); + if (ret < 0) + return ret; + + /* Configure the upstream port, and configure the upstream + * port as the port to which ingress and egress monitor frames + * are to be sent. + */ + REG_WRITE(REG_GLOBAL, 0x1a, (dsa_upstream_port(ds) * 0x1110)); + + /* Disable remote management for now, and set the switch's + * DSA device number. + */ + REG_WRITE(REG_GLOBAL, 0x1c, ds->index & 0x1f); + + /* Send all frames with destination addresses matching + * 01:80:c2:00:00:2x to the CPU port. + */ + REG_WRITE(REG_GLOBAL2, 0x02, 0xffff); + + /* Send all frames with destination addresses matching + * 01:80:c2:00:00:0x to the CPU port. + */ + REG_WRITE(REG_GLOBAL2, 0x03, 0xffff); + + /* Disable the loopback filter, disable flow control + * messages, disable flood broadcast override, disable + * removing of provider tags, disable ATU age violation + * interrupts, disable tag flow control, force flow + * control priority to the highest, and send all special + * multicast frames to the CPU at the highest priority. + */ + REG_WRITE(REG_GLOBAL2, 0x05, 0x00ff); + + /* Program the DSA routing table. */ + for (i = 0; i < 32; i++) { + int nexthop = 0x1f; + + if (i != ds->index && i < ds->dst->pd->nr_chips) + nexthop = ds->pd->rtable[i] & 0x1f; + + REG_WRITE(REG_GLOBAL2, 0x06, 0x8000 | (i << 8) | nexthop); + } + + /* Clear all trunk masks. */ + for (i = 0; i < 8; i++) + REG_WRITE(REG_GLOBAL2, 0x07, 0x8000 | (i << 12) | 0x7f); + + /* Clear all trunk mappings. */ + for (i = 0; i < 16; i++) + REG_WRITE(REG_GLOBAL2, 0x08, 0x8000 | (i << 11)); + + /* Disable ingress rate limiting by resetting all ingress + * rate limit registers to their initial state. + */ + for (i = 0; i < 7; i++) + REG_WRITE(REG_GLOBAL2, 0x09, 0x9000 | (i << 8)); + + /* Initialise cross-chip port VLAN table to reset defaults. */ + REG_WRITE(REG_GLOBAL2, 0x0b, 0x9000); + + /* Clear the priority override table. */ + for (i = 0; i < 16; i++) + REG_WRITE(REG_GLOBAL2, 0x0f, 0x8000 | (i << 8)); + + /* @@@ initialise AVB (22/23) watchdog (27) sdet (29) registers */ + + return 0; +} + +static int mv88e6352_setup_port(struct dsa_switch *ds, int p) +{ + int addr = REG_PORT(p); + u16 val; + + /* MAC Forcing register: don't force link, speed, duplex + * or flow control state to any particular values on physical + * ports, but force the CPU port and all DSA ports to 1000 Mb/s + * full duplex. + */ + if (dsa_is_cpu_port(ds, p) || ds->dsa_port_mask & (1 << p)) + REG_WRITE(addr, 0x01, 0x003e); + else + REG_WRITE(addr, 0x01, 0x0003); + + /* Do not limit the period of time that this port can be + * paused for by the remote end or the period of time that + * this port can pause the remote end. + */ + REG_WRITE(addr, 0x02, 0x0000); + + /* Port Control: disable Drop-on-Unlock, disable Drop-on-Lock, + * disable Header mode, enable IGMP/MLD snooping, disable VLAN + * tunneling, determine priority by looking at 802.1p and IP + * priority fields (IP prio has precedence), and set STP state + * to Forwarding. + * + * If this is the CPU link, use DSA or EDSA tagging depending + * on which tagging mode was configured. + * + * If this is a link to another switch, use DSA tagging mode. + * + * If this is the upstream port for this switch, enable + * forwarding of unknown unicasts and multicasts. + */ + val = 0x0433; + if (dsa_is_cpu_port(ds, p)) { + if (ds->dst->tag_protocol == DSA_TAG_PROTO_EDSA) + val |= 0x3300; + else + val |= 0x0100; + } + if (ds->dsa_port_mask & (1 << p)) + val |= 0x0100; + if (p == dsa_upstream_port(ds)) + val |= 0x000c; + REG_WRITE(addr, 0x04, val); + + /* Port Control 1: disable trunking. Also, if this is the + * CPU port, enable learn messages to be sent to this port. + */ + REG_WRITE(addr, 0x05, dsa_is_cpu_port(ds, p) ? 0x8000 : 0x0000); + + /* Port based VLAN map: give each port its own address + * database, allow the CPU port to talk to each of the 'real' + * ports, and allow each of the 'real' ports to only talk to + * the upstream port. + */ + val = (p & 0xf) << 12; + if (dsa_is_cpu_port(ds, p)) + val |= ds->phys_port_mask; + else + val |= 1 << dsa_upstream_port(ds); + REG_WRITE(addr, 0x06, val); + + /* Default VLAN ID and priority: don't set a default VLAN + * ID, and set the default packet priority to zero. + */ + REG_WRITE(addr, 0x07, 0x0000); + + /* Port Control 2: don't force a good FCS, set the maximum + * frame size to 10240 bytes, don't let the switch add or + * strip 802.1q tags, don't discard tagged or untagged frames + * on this port, do a destination address lookup on all + * received packets as usual, disable ARP mirroring and don't + * send a copy of all transmitted/received frames on this port + * to the CPU. + */ + REG_WRITE(addr, 0x08, 0x2080); + + /* Egress rate control: disable egress rate control. */ + REG_WRITE(addr, 0x09, 0x0001); + + /* Egress rate control 2: disable egress rate control. */ + REG_WRITE(addr, 0x0a, 0x0000); + + /* Port Association Vector: when learning source addresses + * of packets, add the address to the address database using + * a port bitmap that has only the bit for this port set and + * the other bits clear. + */ + REG_WRITE(addr, 0x0b, 1 << p); + + /* Port ATU control: disable limiting the number of address + * database entries that this port is allowed to use. + */ + REG_WRITE(addr, 0x0c, 0x0000); + + /* Priority Override: disable DA, SA and VTU priority override. */ + REG_WRITE(addr, 0x0d, 0x0000); + + /* Port Ethertype: use the Ethertype DSA Ethertype value. */ + REG_WRITE(addr, 0x0f, ETH_P_EDSA); + + /* Tag Remap: use an identity 802.1p prio -> switch prio + * mapping. + */ + REG_WRITE(addr, 0x18, 0x3210); + + /* Tag Remap 2: use an identity 802.1p prio -> switch prio + * mapping. + */ + REG_WRITE(addr, 0x19, 0x7654); + + return 0; +} + +#ifdef CONFIG_NET_DSA_HWMON + +static int mv88e6352_phy_page_read(struct dsa_switch *ds, + int port, int page, int reg) +{ + struct mv88e6xxx_priv_state *ps = ds_to_priv(ds); + int ret; + + mutex_lock(&ps->phy_mutex); + ret = __mv88e6352_phy_write(ds, port, 0x16, page); + if (ret < 0) + goto error; + ret = __mv88e6352_phy_read(ds, port, reg); +error: + __mv88e6352_phy_write(ds, port, 0x16, 0x0); + mutex_unlock(&ps->phy_mutex); + return ret; +} + +static int mv88e6352_phy_page_write(struct dsa_switch *ds, + int port, int page, int reg, int val) +{ + struct mv88e6xxx_priv_state *ps = ds_to_priv(ds); + int ret; + + mutex_lock(&ps->phy_mutex); + ret = __mv88e6352_phy_write(ds, port, 0x16, page); + if (ret < 0) + goto error; + + ret = __mv88e6352_phy_write(ds, port, reg, val); +error: + __mv88e6352_phy_write(ds, port, 0x16, 0x0); + mutex_unlock(&ps->phy_mutex); + return ret; +} + +static int mv88e6352_get_temp(struct dsa_switch *ds, int *temp) +{ + int ret; + + *temp = 0; + + ret = mv88e6352_phy_page_read(ds, 0, 6, 27); + if (ret < 0) + return ret; + + *temp = (ret & 0xff) - 25; + + return 0; +} + +static int mv88e6352_get_temp_limit(struct dsa_switch *ds, int *temp) +{ + int ret; + + *temp = 0; + + ret = mv88e6352_phy_page_read(ds, 0, 6, 26); + if (ret < 0) + return ret; + + *temp = (((ret >> 8) & 0x1f) * 5) - 25; + + return 0; +} + +static int mv88e6352_set_temp_limit(struct dsa_switch *ds, int temp) +{ + int ret; + + ret = mv88e6352_phy_page_read(ds, 0, 6, 26); + if (ret < 0) + return ret; + temp = clamp_val(DIV_ROUND_CLOSEST(temp, 5) + 5, 0, 0x1f); + return mv88e6352_phy_page_write(ds, 0, 6, 26, + (ret & 0xe0ff) | (temp << 8)); +} + +static int mv88e6352_get_temp_alarm(struct dsa_switch *ds, bool *alarm) +{ + int ret; + + *alarm = false; + + ret = mv88e6352_phy_page_read(ds, 0, 6, 26); + if (ret < 0) + return ret; + + *alarm = !!(ret & 0x40); + + return 0; +} +#endif /* CONFIG_NET_DSA_HWMON */ + +static int mv88e6352_setup(struct dsa_switch *ds) +{ + struct mv88e6xxx_priv_state *ps = ds_to_priv(ds); + int ret; + int i; + + mutex_init(&ps->smi_mutex); + mutex_init(&ps->stats_mutex); + mutex_init(&ps->phy_mutex); + mutex_init(&ps->eeprom_mutex); + + ps->id = REG_READ(REG_PORT(0), 0x03) & 0xfff0; + + ret = mv88e6352_switch_reset(ds); + if (ret < 0) + return ret; + + /* @@@ initialise vtu and atu */ + + ret = mv88e6352_setup_global(ds); + if (ret < 0) + return ret; + + for (i = 0; i < 7; i++) { + ret = mv88e6352_setup_port(ds, i); + if (ret < 0) + return ret; + } + + return 0; +} + +static int mv88e6352_port_to_phy_addr(int port) +{ + if (port >= 0 && port <= 4) + return port; + return -EINVAL; +} + +static int +mv88e6352_phy_read(struct dsa_switch *ds, int port, int regnum) +{ + struct mv88e6xxx_priv_state *ps = ds_to_priv(ds); + int addr = mv88e6352_port_to_phy_addr(port); + int ret; + + if (addr < 0) + return addr; + + mutex_lock(&ps->phy_mutex); + ret = __mv88e6352_phy_read(ds, addr, regnum); + mutex_unlock(&ps->phy_mutex); + + return ret; +} + +static int +mv88e6352_phy_write(struct dsa_switch *ds, int port, int regnum, u16 val) +{ + struct mv88e6xxx_priv_state *ps = ds_to_priv(ds); + int addr = mv88e6352_port_to_phy_addr(port); + int ret; + + if (addr < 0) + return addr; + + mutex_lock(&ps->phy_mutex); + ret = __mv88e6352_phy_write(ds, addr, regnum, val); + mutex_unlock(&ps->phy_mutex); + + return ret; +} + +static struct mv88e6xxx_hw_stat mv88e6352_hw_stats[] = { + { "in_good_octets", 8, 0x00, }, + { "in_bad_octets", 4, 0x02, }, + { "in_unicast", 4, 0x04, }, + { "in_broadcasts", 4, 0x06, }, + { "in_multicasts", 4, 0x07, }, + { "in_pause", 4, 0x16, }, + { "in_undersize", 4, 0x18, }, + { "in_fragments", 4, 0x19, }, + { "in_oversize", 4, 0x1a, }, + { "in_jabber", 4, 0x1b, }, + { "in_rx_error", 4, 0x1c, }, + { "in_fcs_error", 4, 0x1d, }, + { "out_octets", 8, 0x0e, }, + { "out_unicast", 4, 0x10, }, + { "out_broadcasts", 4, 0x13, }, + { "out_multicasts", 4, 0x12, }, + { "out_pause", 4, 0x15, }, + { "excessive", 4, 0x11, }, + { "collisions", 4, 0x1e, }, + { "deferred", 4, 0x05, }, + { "single", 4, 0x14, }, + { "multiple", 4, 0x17, }, + { "out_fcs_error", 4, 0x03, }, + { "late", 4, 0x1f, }, + { "hist_64bytes", 4, 0x08, }, + { "hist_65_127bytes", 4, 0x09, }, + { "hist_128_255bytes", 4, 0x0a, }, + { "hist_256_511bytes", 4, 0x0b, }, + { "hist_512_1023bytes", 4, 0x0c, }, + { "hist_1024_max_bytes", 4, 0x0d, }, + { "sw_in_discards", 4, 0x110, }, + { "sw_in_filtered", 2, 0x112, }, + { "sw_out_filtered", 2, 0x113, }, +}; + +static int mv88e6352_read_eeprom_word(struct dsa_switch *ds, int addr) +{ + struct mv88e6xxx_priv_state *ps = ds_to_priv(ds); + int ret; + + mutex_lock(&ps->eeprom_mutex); + + ret = mv88e6xxx_reg_write(ds, REG_GLOBAL2, 0x14, + 0xc000 | (addr & 0xff)); + if (ret < 0) + goto error; + + ret = mv88e6352_eeprom_busy_wait(ds); + if (ret < 0) + goto error; + + ret = mv88e6xxx_reg_read(ds, REG_GLOBAL2, 0x15); +error: + mutex_unlock(&ps->eeprom_mutex); + return ret; +} + +static int mv88e6352_get_eeprom(struct dsa_switch *ds, + struct ethtool_eeprom *eeprom, u8 *data) +{ + int offset; + int len; + int ret; + + offset = eeprom->offset; + len = eeprom->len; + eeprom->len = 0; + + eeprom->magic = 0xc3ec4951; + + ret = mv88e6352_eeprom_load_wait(ds); + if (ret < 0) + return ret; + + if (offset & 1) { + int word; + + word = mv88e6352_read_eeprom_word(ds, offset >> 1); + if (word < 0) + return word; + + *data++ = (word >> 8) & 0xff; + + offset++; + len--; + eeprom->len++; + } + + while (len >= 2) { + int word; + + word = mv88e6352_read_eeprom_word(ds, offset >> 1); + if (word < 0) + return word; + + *data++ = word & 0xff; + *data++ = (word >> 8) & 0xff; + + offset += 2; + len -= 2; + eeprom->len += 2; + } + + if (len) { + int word; + + word = mv88e6352_read_eeprom_word(ds, offset >> 1); + if (word < 0) + return word; + + *data++ = word & 0xff; + + offset++; + len--; + eeprom->len++; + } + + return 0; +} + +static int mv88e6352_eeprom_is_readonly(struct dsa_switch *ds) +{ + int ret; + + ret = mv88e6xxx_reg_read(ds, REG_GLOBAL2, 0x14); + if (ret < 0) + return ret; + + if (!(ret & 0x0400)) + return -EROFS; + + return 0; +} + +static int mv88e6352_write_eeprom_word(struct dsa_switch *ds, int addr, + u16 data) +{ + struct mv88e6xxx_priv_state *ps = ds_to_priv(ds); + int ret; + + mutex_lock(&ps->eeprom_mutex); + + ret = mv88e6xxx_reg_write(ds, REG_GLOBAL2, 0x15, data); + if (ret < 0) + goto error; + + ret = mv88e6xxx_reg_write(ds, REG_GLOBAL2, 0x14, + 0xb000 | (addr & 0xff)); + if (ret < 0) + goto error; + + ret = mv88e6352_eeprom_busy_wait(ds); +error: + mutex_unlock(&ps->eeprom_mutex); + return ret; +} + +static int mv88e6352_set_eeprom(struct dsa_switch *ds, + struct ethtool_eeprom *eeprom, u8 *data) +{ + int offset; + int ret; + int len; + + if (eeprom->magic != 0xc3ec4951) + return -EINVAL; + + ret = mv88e6352_eeprom_is_readonly(ds); + if (ret) + return ret; + + offset = eeprom->offset; + len = eeprom->len; + eeprom->len = 0; + + ret = mv88e6352_eeprom_load_wait(ds); + if (ret < 0) + return ret; + + if (offset & 1) { + int word; + + word = mv88e6352_read_eeprom_word(ds, offset >> 1); + if (word < 0) + return word; + + word = (*data++ << 8) | (word & 0xff); + + ret = mv88e6352_write_eeprom_word(ds, offset >> 1, word); + if (ret < 0) + return ret; + + offset++; + len--; + eeprom->len++; + } + + while (len >= 2) { + int word; + + word = *data++; + word |= *data++ << 8; + + ret = mv88e6352_write_eeprom_word(ds, offset >> 1, word); + if (ret < 0) + return ret; + + offset += 2; + len -= 2; + eeprom->len += 2; + } + + if (len) { + int word; + + word = mv88e6352_read_eeprom_word(ds, offset >> 1); + if (word < 0) + return word; + + word = (word & 0xff00) | *data++; + + ret = mv88e6352_write_eeprom_word(ds, offset >> 1, word); + if (ret < 0) + return ret; + + offset++; + len--; + eeprom->len++; + } + + return 0; +} + +static void +mv88e6352_get_strings(struct dsa_switch *ds, int port, uint8_t *data) +{ + mv88e6xxx_get_strings(ds, ARRAY_SIZE(mv88e6352_hw_stats), + mv88e6352_hw_stats, port, data); +} + +static void +mv88e6352_get_ethtool_stats(struct dsa_switch *ds, int port, uint64_t *data) +{ + mv88e6xxx_get_ethtool_stats(ds, ARRAY_SIZE(mv88e6352_hw_stats), + mv88e6352_hw_stats, port, data); +} + +static int mv88e6352_get_sset_count(struct dsa_switch *ds) +{ + return ARRAY_SIZE(mv88e6352_hw_stats); +} + +struct dsa_switch_driver mv88e6352_switch_driver = { + .tag_protocol = DSA_TAG_PROTO_EDSA, + .priv_size = sizeof(struct mv88e6xxx_priv_state), + .probe = mv88e6352_probe, + .setup = mv88e6352_setup, + .set_addr = mv88e6xxx_set_addr_indirect, + .phy_read = mv88e6352_phy_read, + .phy_write = mv88e6352_phy_write, + .poll_link = mv88e6xxx_poll_link, + .get_strings = mv88e6352_get_strings, + .get_ethtool_stats = mv88e6352_get_ethtool_stats, + .get_sset_count = mv88e6352_get_sset_count, +#ifdef CONFIG_NET_DSA_HWMON + .get_temp = mv88e6352_get_temp, + .get_temp_limit = mv88e6352_get_temp_limit, + .set_temp_limit = mv88e6352_set_temp_limit, + .get_temp_alarm = mv88e6352_get_temp_alarm, +#endif + .get_eeprom = mv88e6352_get_eeprom, + .set_eeprom = mv88e6352_set_eeprom, + .get_regs_len = mv88e6xxx_get_regs_len, + .get_regs = mv88e6xxx_get_regs, +}; + +MODULE_ALIAS("platform:mv88e6352"); |