From: Rafał Miłecki rafal@milecki.pl
[ Upstream commit 63f8428b4077de3664eb0b252393c839b0b293ec ]
Broadcom's b53 switches have one IMP (Inband Management Port) that needs to be programmed using its own designed register. IMP port may be different than CPU port - especially on devices with multiple CPU ports.
For that reason it's required to explicitly note IMP port index and check for it when choosing a register to use.
This commit fixes BCM5301x support. Those switches use CPU port 5 while their IMP port is 8. Before this patch b53 was trying to program port 5 with B53_PORT_OVERRIDE_CTRL instead of B53_GMII_PORT_OVERRIDE_CTRL(5).
It may be possible to also replace "cpu_port" usages with dsa_is_cpu_port() but that is out of the scope of thix BCM5301x fix.
Fixes: 967dd82ffc52 ("net: dsa: b53: Add support for Broadcom RoboSwitch") Signed-off-by: Rafał Miłecki rafal@milecki.pl Signed-off-by: David S. Miller davem@davemloft.net Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/net/dsa/b53/b53_common.c | 28 +++++++++++++++++++++++++--- drivers/net/dsa/b53/b53_priv.h | 1 + 2 files changed, 26 insertions(+), 3 deletions(-)
diff --git a/drivers/net/dsa/b53/b53_common.c b/drivers/net/dsa/b53/b53_common.c index 5646eb8afe38..604f54112665 100644 --- a/drivers/net/dsa/b53/b53_common.c +++ b/drivers/net/dsa/b53/b53_common.c @@ -1144,7 +1144,7 @@ static void b53_force_link(struct b53_device *dev, int port, int link) u8 reg, val, off;
/* Override the port settings */ - if (port == dev->cpu_port) { + if (port == dev->imp_port) { off = B53_PORT_OVERRIDE_CTRL; val = PORT_OVERRIDE_EN; } else { @@ -1168,7 +1168,7 @@ static void b53_force_port_config(struct b53_device *dev, int port, u8 reg, val, off;
/* Override the port settings */ - if (port == dev->cpu_port) { + if (port == dev->imp_port) { off = B53_PORT_OVERRIDE_CTRL; val = PORT_OVERRIDE_EN; } else { @@ -1236,7 +1236,7 @@ static void b53_adjust_link(struct dsa_switch *ds, int port, b53_force_link(dev, port, phydev->link);
if (is531x5(dev) && phy_interface_is_rgmii(phydev)) { - if (port == 8) + if (port == dev->imp_port) off = B53_RGMII_CTRL_IMP; else off = B53_RGMII_CTRL_P(port); @@ -2280,6 +2280,7 @@ struct b53_chip_data { const char *dev_name; u16 vlans; u16 enabled_ports; + u8 imp_port; u8 cpu_port; u8 vta_regs[3]; u8 arl_bins; @@ -2304,6 +2305,7 @@ static const struct b53_chip_data b53_switch_chips[] = { .enabled_ports = 0x1f, .arl_bins = 2, .arl_buckets = 1024, + .imp_port = 5, .cpu_port = B53_CPU_PORT_25, .duplex_reg = B53_DUPLEX_STAT_FE, }, @@ -2314,6 +2316,7 @@ static const struct b53_chip_data b53_switch_chips[] = { .enabled_ports = 0x1f, .arl_bins = 2, .arl_buckets = 1024, + .imp_port = 5, .cpu_port = B53_CPU_PORT_25, .duplex_reg = B53_DUPLEX_STAT_FE, }, @@ -2324,6 +2327,7 @@ static const struct b53_chip_data b53_switch_chips[] = { .enabled_ports = 0x1f, .arl_bins = 4, .arl_buckets = 1024, + .imp_port = 8, .cpu_port = B53_CPU_PORT, .vta_regs = B53_VTA_REGS, .duplex_reg = B53_DUPLEX_STAT_GE, @@ -2337,6 +2341,7 @@ static const struct b53_chip_data b53_switch_chips[] = { .enabled_ports = 0x1f, .arl_bins = 4, .arl_buckets = 1024, + .imp_port = 8, .cpu_port = B53_CPU_PORT, .vta_regs = B53_VTA_REGS, .duplex_reg = B53_DUPLEX_STAT_GE, @@ -2350,6 +2355,7 @@ static const struct b53_chip_data b53_switch_chips[] = { .enabled_ports = 0x1f, .arl_bins = 4, .arl_buckets = 1024, + .imp_port = 8, .cpu_port = B53_CPU_PORT, .vta_regs = B53_VTA_REGS_9798, .duplex_reg = B53_DUPLEX_STAT_GE, @@ -2363,6 +2369,7 @@ static const struct b53_chip_data b53_switch_chips[] = { .enabled_ports = 0x7f, .arl_bins = 4, .arl_buckets = 1024, + .imp_port = 8, .cpu_port = B53_CPU_PORT, .vta_regs = B53_VTA_REGS_9798, .duplex_reg = B53_DUPLEX_STAT_GE, @@ -2377,6 +2384,7 @@ static const struct b53_chip_data b53_switch_chips[] = { .arl_bins = 4, .arl_buckets = 1024, .vta_regs = B53_VTA_REGS, + .imp_port = 8, .cpu_port = B53_CPU_PORT, .duplex_reg = B53_DUPLEX_STAT_GE, .jumbo_pm_reg = B53_JUMBO_PORT_MASK, @@ -2389,6 +2397,7 @@ static const struct b53_chip_data b53_switch_chips[] = { .enabled_ports = 0xff, .arl_bins = 4, .arl_buckets = 1024, + .imp_port = 8, .cpu_port = B53_CPU_PORT, .vta_regs = B53_VTA_REGS, .duplex_reg = B53_DUPLEX_STAT_GE, @@ -2402,6 +2411,7 @@ static const struct b53_chip_data b53_switch_chips[] = { .enabled_ports = 0x1ff, .arl_bins = 4, .arl_buckets = 1024, + .imp_port = 8, .cpu_port = B53_CPU_PORT, .vta_regs = B53_VTA_REGS, .duplex_reg = B53_DUPLEX_STAT_GE, @@ -2415,6 +2425,7 @@ static const struct b53_chip_data b53_switch_chips[] = { .enabled_ports = 0, /* pdata must provide them */ .arl_bins = 4, .arl_buckets = 1024, + .imp_port = 8, .cpu_port = B53_CPU_PORT, .vta_regs = B53_VTA_REGS_63XX, .duplex_reg = B53_DUPLEX_STAT_63XX, @@ -2428,6 +2439,7 @@ static const struct b53_chip_data b53_switch_chips[] = { .enabled_ports = 0x1f, .arl_bins = 4, .arl_buckets = 1024, + .imp_port = 8, .cpu_port = B53_CPU_PORT_25, /* TODO: auto detect */ .vta_regs = B53_VTA_REGS, .duplex_reg = B53_DUPLEX_STAT_GE, @@ -2441,6 +2453,7 @@ static const struct b53_chip_data b53_switch_chips[] = { .enabled_ports = 0x1bf, .arl_bins = 4, .arl_buckets = 1024, + .imp_port = 8, .cpu_port = B53_CPU_PORT_25, /* TODO: auto detect */ .vta_regs = B53_VTA_REGS, .duplex_reg = B53_DUPLEX_STAT_GE, @@ -2454,6 +2467,7 @@ static const struct b53_chip_data b53_switch_chips[] = { .enabled_ports = 0x1bf, .arl_bins = 4, .arl_buckets = 1024, + .imp_port = 8, .cpu_port = B53_CPU_PORT_25, /* TODO: auto detect */ .vta_regs = B53_VTA_REGS, .duplex_reg = B53_DUPLEX_STAT_GE, @@ -2467,6 +2481,7 @@ static const struct b53_chip_data b53_switch_chips[] = { .enabled_ports = 0x1f, .arl_bins = 4, .arl_buckets = 1024, + .imp_port = 8, .cpu_port = B53_CPU_PORT_25, /* TODO: auto detect */ .vta_regs = B53_VTA_REGS, .duplex_reg = B53_DUPLEX_STAT_GE, @@ -2480,6 +2495,7 @@ static const struct b53_chip_data b53_switch_chips[] = { .enabled_ports = 0x1f, .arl_bins = 4, .arl_buckets = 1024, + .imp_port = 8, .cpu_port = B53_CPU_PORT_25, /* TODO: auto detect */ .vta_regs = B53_VTA_REGS, .duplex_reg = B53_DUPLEX_STAT_GE, @@ -2493,6 +2509,7 @@ static const struct b53_chip_data b53_switch_chips[] = { .enabled_ports = 0x1ff, .arl_bins = 4, .arl_buckets = 1024, + .imp_port = 8, .cpu_port = B53_CPU_PORT, .vta_regs = B53_VTA_REGS, .duplex_reg = B53_DUPLEX_STAT_GE, @@ -2506,6 +2523,7 @@ static const struct b53_chip_data b53_switch_chips[] = { .enabled_ports = 0x103, .arl_bins = 4, .arl_buckets = 1024, + .imp_port = 8, .cpu_port = B53_CPU_PORT, .vta_regs = B53_VTA_REGS, .duplex_reg = B53_DUPLEX_STAT_GE, @@ -2520,6 +2538,7 @@ static const struct b53_chip_data b53_switch_chips[] = { .enabled_ports = 0x1bf, .arl_bins = 4, .arl_buckets = 256, + .imp_port = 8, .cpu_port = 8, /* TODO: ports 4, 5, 8 */ .vta_regs = B53_VTA_REGS, .duplex_reg = B53_DUPLEX_STAT_GE, @@ -2533,6 +2552,7 @@ static const struct b53_chip_data b53_switch_chips[] = { .enabled_ports = 0x1ff, .arl_bins = 4, .arl_buckets = 1024, + .imp_port = 8, .cpu_port = B53_CPU_PORT, .vta_regs = B53_VTA_REGS, .duplex_reg = B53_DUPLEX_STAT_GE, @@ -2546,6 +2566,7 @@ static const struct b53_chip_data b53_switch_chips[] = { .enabled_ports = 0x1ff, .arl_bins = 4, .arl_buckets = 256, + .imp_port = 8, .cpu_port = B53_CPU_PORT, .vta_regs = B53_VTA_REGS, .duplex_reg = B53_DUPLEX_STAT_GE, @@ -2571,6 +2592,7 @@ static int b53_switch_init(struct b53_device *dev) dev->vta_regs[1] = chip->vta_regs[1]; dev->vta_regs[2] = chip->vta_regs[2]; dev->jumbo_pm_reg = chip->jumbo_pm_reg; + dev->imp_port = chip->imp_port; dev->cpu_port = chip->cpu_port; dev->num_vlans = chip->vlans; dev->num_arl_bins = chip->arl_bins; diff --git a/drivers/net/dsa/b53/b53_priv.h b/drivers/net/dsa/b53/b53_priv.h index 9bf8319342b0..5d068acf7cf8 100644 --- a/drivers/net/dsa/b53/b53_priv.h +++ b/drivers/net/dsa/b53/b53_priv.h @@ -123,6 +123,7 @@ struct b53_device {
/* used ports mask */ u16 enabled_ports; + unsigned int imp_port; unsigned int cpu_port;
/* connect specific data */