[PATCH 5.19 038/158] net: dsa: microchip: move switch chip_id detection to ksz_common

Greg Kroah-Hartman
2022-08-29T12:37:00Z

From: Arun Ramadoss <arun.ramadoss@microchip.com>

[ Upstream commit 91a98917a8839923d404a77c21646ca5fc9e330a ]

KSZ87xx and KSZ88xx have chip_id representation at reg location 0. And
KSZ9477 compatible switch and LAN937x switch have same chip_id detection
at location 0x01 and 0x02. To have the common switch detect
functionality for ksz switches, ksz_switch_detect function is
introduced.

Signed-off-by: Arun Ramadoss <arun.ramadoss@microchip.com>
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
drivers/net/dsa/microchip/ksz8795.c | 48 +--------------
drivers/net/dsa/microchip/ksz8795_reg.h | 16 -----
drivers/net/dsa/microchip/ksz9477.c | 21 -------
drivers/net/dsa/microchip/ksz9477_reg.h | 1 -
drivers/net/dsa/microchip/ksz_common.c | 78 +++++++++++++++++++++++--
drivers/net/dsa/microchip/ksz_common.h | 19 +++++-
6 files changed, 93 insertions(+), 90 deletions(-)

diff --git a/drivers/net/dsa/microchip/ksz8795.c b/drivers/net/dsa/microchip/ksz8795.c
index 12a599d5e61a4..3cc51ee5fb6cc 100644
--- a/drivers/net/dsa/microchip/ksz8795.c
+++ b/drivers/net/dsa/microchip/ksz8795.c
@@ -1272,7 +1272,7 @@ static void ksz8_config_cpu_port(struct dsa_switch *ds)
continue;
if (!ksz_is_ksz88x3(dev)) {
ksz_pread8(dev, i, regs[P_REMOTE_STATUS], &remote);
- if (remote & PORT_FIBER_MODE)
+ if (remote & KSZ8_PORT_FIBER_MODE)
p->fiber = 1;
}
if (p->fiber)
@@ -1424,51 +1424,6 @@ static u32 ksz8_get_port_addr(int port, int offset)
return PORT_CTRL_ADDR(port, offset);
}

-static int ksz8_switch_detect(struct ksz_device *dev)
-{
- u8 id1, id2;
- u16 id16;
- int ret;
-
- /* read chip id */
- ret = ksz_read16(dev, REG_CHIP_ID0, &id16);
- if (ret)
- return ret;
-
- id1 = id16 >> 8;
- id2 = id16 & SW_CHIP_ID_M;
-
- switch (id1) {
- case KSZ87_FAMILY_ID:
- if ((id2 != CHIP_ID_94 && id2 != CHIP_ID_95))
- return -ENODEV;
-
- if (id2 == CHIP_ID_95) {
- u8 val;
-
- id2 = 0x95;
- ksz_read8(dev, REG_PORT_STATUS_0, &val);
- if (val & PORT_FIBER_MODE)
- id2 = 0x65;
- } else if (id2 == CHIP_ID_94) {
- id2 = 0x94;
- }
- break;
- case KSZ88_FAMILY_ID:
- if (id2 != CHIP_ID_63)
- return -ENODEV;
- break;
- default:
- dev_err(dev->dev, "invalid family id: %d\n", id1);
- return -ENODEV;
- }
- id16 &= ~0xff;
- id16 |= id2;
- dev->chip_id = id16;
-
- return 0;
-}
-
static int ksz8_switch_init(struct ksz_device *dev)
{
struct ksz8 *ksz8 = dev->priv;
@@ -1522,7 +1477,6 @@ static const struct ksz_dev_ops ksz8_dev_ops = {
.freeze_mib = ksz8_freeze_mib,
.port_init_cnt = ksz8_port_init_cnt,
.shutdown = ksz8_reset_switch,
- .detect = ksz8_switch_detect,
.init = ksz8_switch_init,
.exit = ksz8_switch_exit,
};
diff --git a/drivers/net/dsa/microchip/ksz8795_reg.h b/drivers/net/dsa/microchip/ksz8795_reg.h
index 4109433b6b6c2..b8f6ad7581bcd 100644
--- a/drivers/net/dsa/microchip/ksz8795_reg.h
+++ b/drivers/net/dsa/microchip/ksz8795_reg.h
@@ -14,23 +14,10 @@
#define KS_PRIO_M 0x3
#define KS_PRIO_S 2

-#define REG_CHIP_ID0 0x00
-
-#define KSZ87_FAMILY_ID 0x87
-#define KSZ88_FAMILY_ID 0x88
-
-#define REG_CHIP_ID1 0x01
-
-#define SW_CHIP_ID_M 0xF0
-#define SW_CHIP_ID_S 4
#define SW_REVISION_M 0x0E
#define SW_REVISION_S 1
#define SW_START 0x01

-#define CHIP_ID_94 0x60
-#define CHIP_ID_95 0x90
-#define CHIP_ID_63 0x30
-
#define KSZ8863_REG_SW_RESET 0x43

#define KSZ8863_GLOBAL_SOFTWARE_RESET BIT(4)
@@ -217,8 +204,6 @@
#define REG_PORT_4_STATUS_0 0x48

/* For KSZ8765. */
-#define PORT_FIBER_MODE BIT(7)
-
#define PORT_REMOTE_ASYM_PAUSE BIT(5)
#define PORT_REMOTE_SYM_PAUSE BIT(4)
#define PORT_REMOTE_100BTX_FD BIT(3)
@@ -322,7 +307,6 @@

#define REG_PORT_CTRL_5 0x05

-#define REG_PORT_STATUS_0 0x08
#define REG_PORT_STATUS_1 0x09
#define REG_PORT_LINK_MD_CTRL 0x0A
#define REG_PORT_LINK_MD_RESULT 0x0B
diff --git a/drivers/net/dsa/microchip/ksz9477.c b/drivers/net/dsa/microchip/ksz9477.c
index 876a801ac23a4..bcfdd505ca79a 100644
--- a/drivers/net/dsa/microchip/ksz9477.c
+++ b/drivers/net/dsa/microchip/ksz9477.c
@@ -1363,23 +1363,6 @@ static u32 ksz9477_get_port_addr(int port, int offset)
return PORT_CTRL_ADDR(port, offset);
}

-static int ksz9477_switch_detect(struct ksz_device *dev)
-{
- u32 id32;
- int ret;
-
- /* read chip id */
- ret = ksz_read32(dev, REG_CHIP_ID0__1, &id32);
- if (ret)
- return ret;
-
- dev_dbg(dev->dev, "Switch detect: ID=%08x\n", id32);
-
- dev->chip_id = id32 & 0x00FFFF00;
-
- return 0;
-}
-
static int ksz9477_switch_init(struct ksz_device *dev)
{
u8 data8;
@@ -1410,8 +1393,6 @@ static int ksz9477_switch_init(struct ksz_device *dev)
dev->features = GBIT_SUPPORT;

if (dev->chip_id == KSZ9893_CHIP_ID) {
- /* Chip is from KSZ9893 design. */
- dev_info(dev->dev, "Found KSZ9893\n");
dev->features |= IS_9893;

/* Chip does not support gigabit. */
@@ -1419,7 +1400,6 @@ static int ksz9477_switch_init(struct ksz_device *dev)
dev->features &= ~GBIT_SUPPORT;
dev->phy_port_cnt = 2;
} else {
- dev_info(dev->dev, "Found KSZ9477 or compatible\n");
/* Chip uses new XMII register definitions. */
dev->features |= NEW_XMII;

@@ -1446,7 +1426,6 @@ static const struct ksz_dev_ops ksz9477_dev_ops = {
.freeze_mib = ksz9477_freeze_mib,
.port_init_cnt = ksz9477_port_init_cnt,
.shutdown = ksz9477_reset_switch,
- .detect = ksz9477_switch_detect,
.init = ksz9477_switch_init,
.exit = ksz9477_switch_exit,
};
diff --git a/drivers/net/dsa/microchip/ksz9477_reg.h b/drivers/net/dsa/microchip/ksz9477_reg.h
index 7a2c8d4767aff..077e35ab11b54 100644
--- a/drivers/net/dsa/microchip/ksz9477_reg.h
+++ b/drivers/net/dsa/microchip/ksz9477_reg.h
@@ -25,7 +25,6 @@

#define REG_CHIP_ID2__1 0x0002

-#define CHIP_ID_63 0x63
#define CHIP_ID_66 0x66
#define CHIP_ID_67 0x67
#define CHIP_ID_77 0x77
diff --git a/drivers/net/dsa/microchip/ksz_common.c b/drivers/net/dsa/microchip/ksz_common.c
index 92a500e1ccd21..4511e99823f57 100644
--- a/drivers/net/dsa/microchip/ksz_common.c
+++ b/drivers/net/dsa/microchip/ksz_common.c
@@ -930,6 +930,72 @@ void ksz_port_stp_state_set(struct dsa_switch *ds, int port,
}
EXPORT_SYMBOL_GPL(ksz_port_stp_state_set);

+static int ksz_switch_detect(struct ksz_device *dev)
+{
+ u8 id1, id2;
+ u16 id16;
+ u32 id32;
+ int ret;
+
+ /* read chip id */
+ ret = ksz_read16(dev, REG_CHIP_ID0, &id16);
+ if (ret)
+ return ret;
+
+ id1 = FIELD_GET(SW_FAMILY_ID_M, id16);
+ id2 = FIELD_GET(SW_CHIP_ID_M, id16);
+
+ switch (id1) {
+ case KSZ87_FAMILY_ID:
+ if (id2 == KSZ87_CHIP_ID_95) {
+ u8 val;
+
+ dev->chip_id = KSZ8795_CHIP_ID;
+
+ ksz_read8(dev, KSZ8_PORT_STATUS_0, &val);
+ if (val & KSZ8_PORT_FIBER_MODE)
+ dev->chip_id = KSZ8765_CHIP_ID;
+ } else if (id2 == KSZ87_CHIP_ID_94) {
+ dev->chip_id = KSZ8794_CHIP_ID;
+ } else {
+ return -ENODEV;
+ }
+ break;
+ case KSZ88_FAMILY_ID:
+ if (id2 == KSZ88_CHIP_ID_63)
+ dev->chip_id = KSZ8830_CHIP_ID;
+ else
+ return -ENODEV;
+ break;
+ default:
+ ret = ksz_read32(dev, REG_CHIP_ID0, &id32);
+ if (ret)
+ return ret;
+
+ dev->chip_rev = FIELD_GET(SW_REV_ID_M, id32);
+ id32 &= ~0xFF;
+
+ switch (id32) {
+ case KSZ9477_CHIP_ID:
+ case KSZ9897_CHIP_ID:
+ case KSZ9893_CHIP_ID:
+ case KSZ9567_CHIP_ID:
+ case LAN9370_CHIP_ID:
+ case LAN9371_CHIP_ID:
+ case LAN9372_CHIP_ID:
+ case LAN9373_CHIP_ID:
+ case LAN9374_CHIP_ID:
+ dev->chip_id = id32;
+ break;
+ default:
+ dev_err(dev->dev,
+ "unsupported switch detected %x)\n", id32);
+ return -ENODEV;
+ }
+ }
+ return 0;
+}
+
struct ksz_device *ksz_switch_alloc(struct device *base, void *priv)
{
struct dsa_switch *ds;
@@ -986,10 +1052,9 @@ int ksz_switch_register(struct ksz_device *dev,
mutex_init(&dev->alu_mutex);
mutex_init(&dev->vlan_mutex);

- dev->dev_ops = ops;
-
- if (dev->dev_ops->detect(dev))
- return -EINVAL;
+ ret = ksz_switch_detect(dev);
+ if (ret)
+ return ret;

info = ksz_lookup_info(dev->chip_id);
if (!info)
@@ -998,10 +1063,15 @@ int ksz_switch_register(struct ksz_device *dev,
/* Update the compatible info with the probed one */
dev->info = info;

+ dev_info(dev->dev, "found switch: %s, rev %i\n",
+ dev->info->dev_name, dev->chip_rev);
+
ret = ksz_check_device_id(dev);
if (ret)
return ret;

+ dev->dev_ops = ops;
+
ret = dev->dev_ops->init(dev);
if (ret)
return ret;
diff --git a/drivers/net/dsa/microchip/ksz_common.h b/drivers/net/dsa/microchip/ksz_common.h
index 8500eaedad67a..e6bc5fb2b1303 100644
--- a/drivers/net/dsa/microchip/ksz_common.h
+++ b/drivers/net/dsa/microchip/ksz_common.h
@@ -90,6 +90,7 @@ struct ksz_device {

/* chip specific data */
u32 chip_id;
+ u8 chip_rev;
int cpu_port; /* port connected to CPU */
int phy_port_cnt;
phy_interface_t compat_interface;
@@ -182,7 +183,6 @@ struct ksz_dev_ops {
void (*freeze_mib)(struct ksz_device *dev, int port, bool freeze);
void (*port_init_cnt)(struct ksz_device *dev, int port);
int (*shutdown)(struct ksz_device *dev);
- int (*detect)(struct ksz_device *dev);
int (*init)(struct ksz_device *dev);
void (*exit)(struct ksz_device *dev);
};
@@ -353,6 +353,23 @@ static inline void ksz_regmap_unlock(void *__mtx)
#define PORT_RX_ENABLE BIT(1)
#define PORT_LEARN_DISABLE BIT(0)

+/* Switch ID Defines */
+#define REG_CHIP_ID0 0x00
+
+#define SW_FAMILY_ID_M GENMASK(15, 8)
+#define KSZ87_FAMILY_ID 0x87
+#define KSZ88_FAMILY_ID 0x88
+
+#define KSZ8_PORT_STATUS_0 0x08
+#define KSZ8_PORT_FIBER_MODE BIT(7)
+
+#define SW_CHIP_ID_M GENMASK(7, 4)
+#define KSZ87_CHIP_ID_94 0x6
+#define KSZ87_CHIP_ID_95 0x9
+#define KSZ88_CHIP_ID_63 0x3
+
+#define SW_REV_ID_M GENMASK(7, 4)
+
/* Regmap tables generation */
#define KSZ_SPI_OP_RD 3
#define KSZ_SPI_OP_WR 2
--
2.35.1