From: Vivien Didelot Date: Mon, 9 May 2016 17:22:41 +0000 (-0400) Subject: net: dsa: mv88e6xxx: factorize EEPROM access X-Git-Tag: v4.9.8~2112^2~88^2~17 X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=d24645bebce2b13b3c5c49ff392cfb7f3efe0d76;p=platform%2Fkernel%2Flinux-rpi3.git net: dsa: mv88e6xxx: factorize EEPROM access Add a MV88E6XXX_FLAG_EEPROM flag to describe switch models featuring an EEPROM and distribute the EEPROM access routines to all models. Signed-off-by: Vivien Didelot Signed-off-by: David S. Miller --- diff --git a/drivers/net/dsa/mv88e6123.c b/drivers/net/dsa/mv88e6123.c index ab5885b..8330a8e 100644 --- a/drivers/net/dsa/mv88e6123.c +++ b/drivers/net/dsa/mv88e6123.c @@ -124,6 +124,8 @@ struct dsa_switch_driver mv88e6123_switch_driver = { #ifdef CONFIG_NET_DSA_HWMON .get_temp = mv88e6xxx_get_temp, #endif + .get_eeprom = mv88e6xxx_get_eeprom, + .set_eeprom = mv88e6xxx_set_eeprom, .get_regs_len = mv88e6xxx_get_regs_len, .get_regs = mv88e6xxx_get_regs, }; diff --git a/drivers/net/dsa/mv88e6131.c b/drivers/net/dsa/mv88e6131.c index 9d21d69..ab8c507 100644 --- a/drivers/net/dsa/mv88e6131.c +++ b/drivers/net/dsa/mv88e6131.c @@ -153,6 +153,8 @@ struct dsa_switch_driver mv88e6131_switch_driver = { .get_strings = mv88e6xxx_get_strings, .get_ethtool_stats = mv88e6xxx_get_ethtool_stats, .get_sset_count = mv88e6xxx_get_sset_count, + .get_eeprom = mv88e6xxx_get_eeprom, + .set_eeprom = mv88e6xxx_set_eeprom, .adjust_link = mv88e6xxx_adjust_link, .port_bridge_join = mv88e6xxx_port_bridge_join, .port_bridge_leave = mv88e6xxx_port_bridge_leave, diff --git a/drivers/net/dsa/mv88e6171.c b/drivers/net/dsa/mv88e6171.c index b190647..a7afbaa 100644 --- a/drivers/net/dsa/mv88e6171.c +++ b/drivers/net/dsa/mv88e6171.c @@ -133,6 +133,8 @@ struct dsa_switch_driver mv88e6171_switch_driver = { #ifdef CONFIG_NET_DSA_HWMON .get_temp = mv88e6xxx_get_temp, #endif + .get_eeprom = mv88e6xxx_get_eeprom, + .set_eeprom = mv88e6xxx_set_eeprom, .get_regs_len = mv88e6xxx_get_regs_len, .get_regs = mv88e6xxx_get_regs, .port_bridge_join = mv88e6xxx_port_bridge_join, diff --git a/drivers/net/dsa/mv88e6352.c b/drivers/net/dsa/mv88e6352.c index 6fa7c02..3bb271e 100644 --- a/drivers/net/dsa/mv88e6352.c +++ b/drivers/net/dsa/mv88e6352.c @@ -125,8 +125,6 @@ static int mv88e6352_setup(struct dsa_switch *ds) if (ret < 0) return ret; - mutex_init(&ps->eeprom_mutex); - ret = mv88e6xxx_switch_reset(ps, true); if (ret < 0) return ret; @@ -138,207 +136,6 @@ static int mv88e6352_setup(struct dsa_switch *ds) return mv88e6xxx_setup_ports(ds); } -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(ps, REG_GLOBAL2, GLOBAL2_EEPROM_OP, - GLOBAL2_EEPROM_OP_READ | - (addr & GLOBAL2_EEPROM_OP_ADDR_MASK)); - if (ret < 0) - goto error; - - ret = mv88e6xxx_eeprom_busy_wait(ds); - if (ret < 0) - goto error; - - ret = mv88e6xxx_reg_read(ps, REG_GLOBAL2, GLOBAL2_EEPROM_DATA); -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 = mv88e6xxx_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) -{ - struct mv88e6xxx_priv_state *ps = ds_to_priv(ds); - int ret; - - ret = mv88e6xxx_reg_read(ps, REG_GLOBAL2, GLOBAL2_EEPROM_OP); - if (ret < 0) - return ret; - - if (!(ret & GLOBAL2_EEPROM_OP_WRITE_EN)) - 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(ps, REG_GLOBAL2, GLOBAL2_EEPROM_DATA, data); - if (ret < 0) - goto error; - - ret = mv88e6xxx_reg_write(ps, REG_GLOBAL2, GLOBAL2_EEPROM_OP, - GLOBAL2_EEPROM_OP_WRITE | - (addr & GLOBAL2_EEPROM_OP_ADDR_MASK)); - if (ret < 0) - goto error; - - ret = mv88e6xxx_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 = mv88e6xxx_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; -} - struct dsa_switch_driver mv88e6352_switch_driver = { .tag_protocol = DSA_TAG_PROTO_EDSA, .probe = mv88e6352_drv_probe, @@ -358,8 +155,8 @@ struct dsa_switch_driver mv88e6352_switch_driver = { .set_temp_limit = mv88e6xxx_set_temp_limit, .get_temp_alarm = mv88e6xxx_get_temp_alarm, #endif - .get_eeprom = mv88e6352_get_eeprom, - .set_eeprom = mv88e6352_set_eeprom, + .get_eeprom = mv88e6xxx_get_eeprom, + .set_eeprom = mv88e6xxx_set_eeprom, .get_regs_len = mv88e6xxx_get_regs_len, .get_regs = mv88e6xxx_get_regs, .port_bridge_join = mv88e6xxx_port_bridge_join, diff --git a/drivers/net/dsa/mv88e6xxx.c b/drivers/net/dsa/mv88e6xxx.c index 2c8c5e1..d277350 100644 --- a/drivers/net/dsa/mv88e6xxx.c +++ b/drivers/net/dsa/mv88e6xxx.c @@ -823,7 +823,7 @@ static int _mv88e6xxx_phy_wait(struct mv88e6xxx_priv_state *ps) GLOBAL2_SMI_OP_BUSY); } -int mv88e6xxx_eeprom_load_wait(struct dsa_switch *ds) +static int mv88e6xxx_eeprom_load_wait(struct dsa_switch *ds) { struct mv88e6xxx_priv_state *ps = ds_to_priv(ds); @@ -831,7 +831,7 @@ int mv88e6xxx_eeprom_load_wait(struct dsa_switch *ds) GLOBAL2_EEPROM_OP_LOAD); } -int mv88e6xxx_eeprom_busy_wait(struct dsa_switch *ds) +static int mv88e6xxx_eeprom_busy_wait(struct dsa_switch *ds) { struct mv88e6xxx_priv_state *ps = ds_to_priv(ds); @@ -839,6 +839,215 @@ int mv88e6xxx_eeprom_busy_wait(struct dsa_switch *ds) GLOBAL2_EEPROM_OP_BUSY); } +static int mv88e6xxx_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(ps, REG_GLOBAL2, GLOBAL2_EEPROM_OP, + GLOBAL2_EEPROM_OP_READ | + (addr & GLOBAL2_EEPROM_OP_ADDR_MASK)); + if (ret < 0) + goto error; + + ret = mv88e6xxx_eeprom_busy_wait(ds); + if (ret < 0) + goto error; + + ret = mv88e6xxx_reg_read(ps, REG_GLOBAL2, GLOBAL2_EEPROM_DATA); +error: + mutex_unlock(&ps->eeprom_mutex); + return ret; +} + +int mv88e6xxx_get_eeprom(struct dsa_switch *ds, struct ethtool_eeprom *eeprom, + u8 *data) +{ + struct mv88e6xxx_priv_state *ps = ds_to_priv(ds); + int offset; + int len; + int ret; + + if (!mv88e6xxx_has(ps, MV88E6XXX_FLAG_EEPROM)) + return -EOPNOTSUPP; + + offset = eeprom->offset; + len = eeprom->len; + eeprom->len = 0; + + eeprom->magic = 0xc3ec4951; + + ret = mv88e6xxx_eeprom_load_wait(ds); + if (ret < 0) + return ret; + + if (offset & 1) { + int word; + + word = mv88e6xxx_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 = mv88e6xxx_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 = mv88e6xxx_read_eeprom_word(ds, offset >> 1); + if (word < 0) + return word; + + *data++ = word & 0xff; + + offset++; + len--; + eeprom->len++; + } + + return 0; +} + +static int mv88e6xxx_eeprom_is_readonly(struct dsa_switch *ds) +{ + struct mv88e6xxx_priv_state *ps = ds_to_priv(ds); + int ret; + + ret = mv88e6xxx_reg_read(ps, REG_GLOBAL2, GLOBAL2_EEPROM_OP); + if (ret < 0) + return ret; + + if (!(ret & GLOBAL2_EEPROM_OP_WRITE_EN)) + return -EROFS; + + return 0; +} + +static int mv88e6xxx_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(ps, REG_GLOBAL2, GLOBAL2_EEPROM_DATA, data); + if (ret < 0) + goto error; + + ret = mv88e6xxx_reg_write(ps, REG_GLOBAL2, GLOBAL2_EEPROM_OP, + GLOBAL2_EEPROM_OP_WRITE | + (addr & GLOBAL2_EEPROM_OP_ADDR_MASK)); + if (ret < 0) + goto error; + + ret = mv88e6xxx_eeprom_busy_wait(ds); +error: + mutex_unlock(&ps->eeprom_mutex); + return ret; +} + +int mv88e6xxx_set_eeprom(struct dsa_switch *ds, struct ethtool_eeprom *eeprom, + u8 *data) +{ + struct mv88e6xxx_priv_state *ps = ds_to_priv(ds); + int offset; + int ret; + int len; + + if (!mv88e6xxx_has(ps, MV88E6XXX_FLAG_EEPROM)) + return -EOPNOTSUPP; + + if (eeprom->magic != 0xc3ec4951) + return -EINVAL; + + ret = mv88e6xxx_eeprom_is_readonly(ds); + if (ret) + return ret; + + offset = eeprom->offset; + len = eeprom->len; + eeprom->len = 0; + + ret = mv88e6xxx_eeprom_load_wait(ds); + if (ret < 0) + return ret; + + if (offset & 1) { + int word; + + word = mv88e6xxx_read_eeprom_word(ds, offset >> 1); + if (word < 0) + return word; + + word = (*data++ << 8) | (word & 0xff); + + ret = mv88e6xxx_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 = mv88e6xxx_write_eeprom_word(ds, offset >> 1, word); + if (ret < 0) + return ret; + + offset += 2; + len -= 2; + eeprom->len += 2; + } + + if (len) { + int word; + + word = mv88e6xxx_read_eeprom_word(ds, offset >> 1); + if (word < 0) + return word; + + word = (word & 0xff00) | *data++; + + ret = mv88e6xxx_write_eeprom_word(ds, offset >> 1, word); + if (ret < 0) + return ret; + + offset++; + len--; + eeprom->len++; + } + + return 0; +} + static int _mv88e6xxx_atu_wait(struct mv88e6xxx_priv_state *ps) { return _mv88e6xxx_wait(ps, REG_GLOBAL, GLOBAL_ATU_OP, @@ -2596,6 +2805,9 @@ int mv88e6xxx_setup_common(struct mv88e6xxx_priv_state *ps) INIT_WORK(&ps->bridge_work, mv88e6xxx_bridge_work); + if (mv88e6xxx_has(ps, MV88E6XXX_FLAG_EEPROM)) + mutex_init(&ps->eeprom_mutex); + if (mv88e6xxx_has(ps, MV88E6XXX_FLAG_PPU)) mv88e6xxx_ppu_state_init(ps); diff --git a/drivers/net/dsa/mv88e6xxx.h b/drivers/net/dsa/mv88e6xxx.h index 5972571..0181f67 100644 --- a/drivers/net/dsa/mv88e6xxx.h +++ b/drivers/net/dsa/mv88e6xxx.h @@ -351,6 +351,11 @@ enum mv88e6xxx_family { }; enum mv88e6xxx_cap { + /* EEPROM Command and Data registers. + * See GLOBAL2_EEPROM_OP and GLOBAL2_EEPROM_DATA. + */ + MV88E6XXX_CAP_EEPROM, + /* PHY Polling Unit. * See GLOBAL_CONTROL_PPU_ENABLE and GLOBAL_STATUS_PPU_POLLING. */ @@ -364,6 +369,7 @@ enum mv88e6xxx_cap { }; /* Bitmask of capabilities */ +#define MV88E6XXX_FLAG_EEPROM BIT(MV88E6XXX_CAP_EEPROM) #define MV88E6XXX_FLAG_PPU BIT(MV88E6XXX_CAP_PPU) #define MV88E6XXX_FLAG_SMI_PHY BIT(MV88E6XXX_CAP_SMI_PHY) @@ -379,13 +385,15 @@ enum mv88e6xxx_cap { MV88E6XXX_FLAG_PPU #define MV88E6XXX_FLAGS_FAMILY_6320 \ - MV88E6XXX_FLAG_SMI_PHY + (MV88E6XXX_FLAG_EEPROM | \ + MV88E6XXX_FLAG_SMI_PHY) #define MV88E6XXX_FLAGS_FAMILY_6351 \ MV88E6XXX_FLAG_SMI_PHY #define MV88E6XXX_FLAGS_FAMILY_6352 \ - MV88E6XXX_FLAG_SMI_PHY + (MV88E6XXX_FLAG_EEPROM | \ + MV88E6XXX_FLAG_SMI_PHY) struct mv88e6xxx_info { enum mv88e6xxx_family family; @@ -521,8 +529,10 @@ int mv88e6xxx_get_temp(struct dsa_switch *ds, int *temp); int mv88e6xxx_get_temp_limit(struct dsa_switch *ds, int *temp); int mv88e6xxx_set_temp_limit(struct dsa_switch *ds, int temp); int mv88e6xxx_get_temp_alarm(struct dsa_switch *ds, bool *alarm); -int mv88e6xxx_eeprom_load_wait(struct dsa_switch *ds); -int mv88e6xxx_eeprom_busy_wait(struct dsa_switch *ds); +int mv88e6xxx_get_eeprom(struct dsa_switch *ds, struct ethtool_eeprom *eeprom, + u8 *data); +int mv88e6xxx_set_eeprom(struct dsa_switch *ds, struct ethtool_eeprom *eeprom, + u8 *data); int mv88e6xxx_get_eee(struct dsa_switch *ds, int port, struct ethtool_eee *e); int mv88e6xxx_set_eee(struct dsa_switch *ds, int port, struct phy_device *phydev, struct ethtool_eee *e);