[PATCH 2/4] net: dsa: vsc73xx: Split vsc73xx driver
From: Pawel Dembicki
Date: Mon Jul 01 2019 - 11:29:08 EST
This driver (currently) only takes control of the switch chip over
SPI and configures it to route packages around when connected to a
CPU port. But Vitesse chip support also parallel interface.
This patch split driver into two parts: core and spi. It is required
for add support to another managing interface.
Tested-by: Linus Walleij <linus.walleij@xxxxxxxxxx>
Signed-off-by: Pawel Dembicki <paweldembicki@xxxxxxxxx>
---
arch/arm/boot/dts/gemini-sl93512r.dts | 2 +-
arch/arm/boot/dts/gemini-sq201.dts | 2 +-
drivers/net/dsa/Kconfig | 11 +-
drivers/net/dsa/Makefile | 3 +-
...tesse-vsc73xx.c => vitesse-vsc73xx-core.c} | 265 ++++--------------
drivers/net/dsa/vitesse-vsc73xx-spi.c | 201 +++++++++++++
drivers/net/dsa/vitesse-vsc73xx.h | 30 ++
7 files changed, 297 insertions(+), 217 deletions(-)
rename drivers/net/dsa/{vitesse-vsc73xx.c => vitesse-vsc73xx-core.c} (85%)
create mode 100644 drivers/net/dsa/vitesse-vsc73xx-spi.c
create mode 100644 drivers/net/dsa/vitesse-vsc73xx.h
diff --git a/arch/arm/boot/dts/gemini-sl93512r.dts b/arch/arm/boot/dts/gemini-sl93512r.dts
index 2bb953440793..87f5340387a4 100644
--- a/arch/arm/boot/dts/gemini-sl93512r.dts
+++ b/arch/arm/boot/dts/gemini-sl93512r.dts
@@ -94,7 +94,7 @@
num-chipselects = <1>;
switch@0 {
- compatible = "vitesse,vsc7385";
+ compatible = "vitesse,vsc7385-spi";
reg = <0>;
/* Specified for 2.5 MHz or below */
spi-max-frequency = <2500000>;
diff --git a/arch/arm/boot/dts/gemini-sq201.dts b/arch/arm/boot/dts/gemini-sq201.dts
index 239dfacaae4d..4fcb20f87ba0 100644
--- a/arch/arm/boot/dts/gemini-sq201.dts
+++ b/arch/arm/boot/dts/gemini-sq201.dts
@@ -79,7 +79,7 @@
num-chipselects = <1>;
switch@0 {
- compatible = "vitesse,vsc7395";
+ compatible = "vitesse,vsc7395-spi";
reg = <0>;
/* Specified for 2.5 MHz or below */
spi-max-frequency = <2500000>;
diff --git a/drivers/net/dsa/Kconfig b/drivers/net/dsa/Kconfig
index b91e78e3598f..4ab2aa09e2e4 100644
--- a/drivers/net/dsa/Kconfig
+++ b/drivers/net/dsa/Kconfig
@@ -99,8 +99,8 @@ config NET_DSA_SMSC_LAN9303_MDIO
for MDIO managed mode.
config NET_DSA_VITESSE_VSC73XX
- tristate "Vitesse VSC7385/7388/7395/7398 support"
- depends on OF && SPI
+ tristate
+ depends on OF
depends on NET_DSA
select FIXED_PHY
select VITESSE_PHY
@@ -109,4 +109,11 @@ config NET_DSA_VITESSE_VSC73XX
This enables support for the Vitesse VSC7385, VSC7388,
VSC7395 and VSC7398 SparX integrated ethernet switches.
+config NET_DSA_VITESSE_VSC73XX_SPI
+ tristate "Vitesse VSC7385/7388/7395/7398 SPI mode support"
+ depends on SPI
+ select NET_DSA_VITESSE_VSC73XX
+ ---help---
+ This enables support for the Vitesse VSC7385, VSC7388, VSC7395
+ and VSC7398 SparX integrated ethernet switches in SPI managed mode.
endmenu
diff --git a/drivers/net/dsa/Makefile b/drivers/net/dsa/Makefile
index fefb6aaa82ba..117bf78be211 100644
--- a/drivers/net/dsa/Makefile
+++ b/drivers/net/dsa/Makefile
@@ -14,7 +14,8 @@ realtek-objs := realtek-smi.o rtl8366.o rtl8366rb.o
obj-$(CONFIG_NET_DSA_SMSC_LAN9303) += lan9303-core.o
obj-$(CONFIG_NET_DSA_SMSC_LAN9303_I2C) += lan9303_i2c.o
obj-$(CONFIG_NET_DSA_SMSC_LAN9303_MDIO) += lan9303_mdio.o
-obj-$(CONFIG_NET_DSA_VITESSE_VSC73XX) += vitesse-vsc73xx.o
+obj-$(CONFIG_NET_DSA_VITESSE_VSC73XX) += vitesse-vsc73xx-core.o
+obj-$(CONFIG_NET_DSA_VITESSE_VSC73XX_SPI) += vitesse-vsc73xx-spi.o
obj-y += b53/
obj-y += microchip/
obj-y += mv88e6xxx/
diff --git a/drivers/net/dsa/vitesse-vsc73xx.c b/drivers/net/dsa/vitesse-vsc73xx-core.c
similarity index 85%
rename from drivers/net/dsa/vitesse-vsc73xx.c
rename to drivers/net/dsa/vitesse-vsc73xx-core.c
index d4780610ea8a..9975446cdc66 100644
--- a/drivers/net/dsa/vitesse-vsc73xx.c
+++ b/drivers/net/dsa/vitesse-vsc73xx-core.c
@@ -10,10 +10,6 @@
* handling the switch in a memory-mapped manner by connecting to that external
* CPU's memory bus.
*
- * This driver (currently) only takes control of the switch chip over SPI and
- * configures it to route packages around when connected to a CPU port. The
- * chip has embedded PHYs and VLAN support so we model it using DSA.
- *
* Copyright (C) 2018 Linus Wallej <linus.walleij@xxxxxxxxxx>
* Includes portions of code from the firmware uploader by:
* Copyright (C) 2009 Gabor Juhos <juhosg@xxxxxxxxxxx>
@@ -24,8 +20,6 @@
#include <linux/of.h>
#include <linux/of_device.h>
#include <linux/of_mdio.h>
-#include <linux/platform_device.h>
-#include <linux/spi/spi.h>
#include <linux/bitops.h>
#include <linux/if_bridge.h>
#include <linux/etherdevice.h>
@@ -34,6 +28,8 @@
#include <linux/random.h>
#include <net/dsa.h>
+#include "vitesse-vsc73xx.h"
+
#define VSC73XX_BLOCK_MAC 0x1 /* Subblocks 0-4, 6 (CPU port) */
#define VSC73XX_BLOCK_ANALYZER 0x2 /* Only subblock 0 */
#define VSC73XX_BLOCK_MII 0x3 /* Subblocks 0 and 1 */
@@ -255,13 +251,6 @@
#define VSC73XX_GLORESET_PHY_RESET BIT(1)
#define VSC73XX_GLORESET_MASTER_RESET BIT(0)
-#define VSC73XX_CMD_MODE_READ 0
-#define VSC73XX_CMD_MODE_WRITE 1
-#define VSC73XX_CMD_MODE_SHIFT 4
-#define VSC73XX_CMD_BLOCK_SHIFT 5
-#define VSC73XX_CMD_BLOCK_MASK 0x7
-#define VSC73XX_CMD_SUBBLOCK_MASK 0xf
-
#define VSC7385_CLOCK_DELAY ((3 << 4) | 3)
#define VSC7385_CLOCK_DELAY_MASK ((3 << 4) | 3)
@@ -274,20 +263,6 @@
VSC73XX_ICPU_CTRL_CLK_EN | \
VSC73XX_ICPU_CTRL_SRST)
-/**
- * struct vsc73xx - VSC73xx state container
- */
-struct vsc73xx {
- struct device *dev;
- struct gpio_desc *reset;
- struct spi_device *spi;
- struct dsa_switch *ds;
- struct gpio_chip gc;
- u16 chipid;
- u8 addr[ETH_ALEN];
- struct mutex lock; /* Protects SPI traffic */
-};
-
#define IS_7385(a) ((a)->chipid == VSC73XX_CHIPID_ID_7385)
#define IS_7388(a) ((a)->chipid == VSC73XX_CHIPID_ID_7388)
#define IS_7395(a) ((a)->chipid == VSC73XX_CHIPID_ID_7395)
@@ -365,7 +340,7 @@ static const struct vsc73xx_counter vsc73xx_tx_counters[] = {
{ 29, "TxQoSClass3" }, /* non-standard counter */
};
-static int vsc73xx_is_addr_valid(u8 block, u8 subblock)
+int vsc73xx_is_addr_valid(u8 block, u8 subblock)
{
switch (block) {
case VSC73XX_BLOCK_MAC:
@@ -396,97 +371,7 @@ static int vsc73xx_is_addr_valid(u8 block, u8 subblock)
return 0;
}
-
-static u8 vsc73xx_make_addr(u8 mode, u8 block, u8 subblock)
-{
- u8 ret;
-
- ret = (block & VSC73XX_CMD_BLOCK_MASK) << VSC73XX_CMD_BLOCK_SHIFT;
- ret |= (mode & 1) << VSC73XX_CMD_MODE_SHIFT;
- ret |= subblock & VSC73XX_CMD_SUBBLOCK_MASK;
-
- return ret;
-}
-
-static int vsc73xx_read(struct vsc73xx *vsc, u8 block, u8 subblock, u8 reg,
- u32 *val)
-{
- struct spi_transfer t[2];
- struct spi_message m;
- u8 cmd[4];
- u8 buf[4];
- int ret;
-
- if (!vsc73xx_is_addr_valid(block, subblock))
- return -EINVAL;
-
- spi_message_init(&m);
-
- memset(&t, 0, sizeof(t));
-
- t[0].tx_buf = cmd;
- t[0].len = sizeof(cmd);
- spi_message_add_tail(&t[0], &m);
-
- t[1].rx_buf = buf;
- t[1].len = sizeof(buf);
- spi_message_add_tail(&t[1], &m);
-
- cmd[0] = vsc73xx_make_addr(VSC73XX_CMD_MODE_READ, block, subblock);
- cmd[1] = reg;
- cmd[2] = 0;
- cmd[3] = 0;
-
- mutex_lock(&vsc->lock);
- ret = spi_sync(vsc->spi, &m);
- mutex_unlock(&vsc->lock);
-
- if (ret)
- return ret;
-
- *val = (buf[0] << 24) | (buf[1] << 16) | (buf[2] << 8) | buf[3];
-
- return 0;
-}
-
-static int vsc73xx_write(struct vsc73xx *vsc, u8 block, u8 subblock, u8 reg,
- u32 val)
-{
- struct spi_transfer t[2];
- struct spi_message m;
- u8 cmd[2];
- u8 buf[4];
- int ret;
-
- if (!vsc73xx_is_addr_valid(block, subblock))
- return -EINVAL;
-
- spi_message_init(&m);
-
- memset(&t, 0, sizeof(t));
-
- t[0].tx_buf = cmd;
- t[0].len = sizeof(cmd);
- spi_message_add_tail(&t[0], &m);
-
- t[1].tx_buf = buf;
- t[1].len = sizeof(buf);
- spi_message_add_tail(&t[1], &m);
-
- cmd[0] = vsc73xx_make_addr(VSC73XX_CMD_MODE_WRITE, block, subblock);
- cmd[1] = reg;
-
- buf[0] = (val >> 24) & 0xff;
- buf[1] = (val >> 16) & 0xff;
- buf[2] = (val >> 8) & 0xff;
- buf[3] = val & 0xff;
-
- mutex_lock(&vsc->lock);
- ret = spi_sync(vsc->spi, &m);
- mutex_unlock(&vsc->lock);
-
- return ret;
-}
+EXPORT_SYMBOL(vsc73xx_is_addr_valid);
static int vsc73xx_update_bits(struct vsc73xx *vsc, u8 block, u8 subblock,
u8 reg, u32 mask, u32 val)
@@ -495,12 +380,12 @@ static int vsc73xx_update_bits(struct vsc73xx *vsc, u8 block, u8 subblock,
int ret;
/* Same read-modify-write algorithm as e.g. regmap */
- ret = vsc73xx_read(vsc, block, subblock, reg, &orig);
+ ret = vsc->ops->read(vsc, block, subblock, reg, &orig);
if (ret)
return ret;
tmp = orig & ~mask;
tmp |= val & mask;
- return vsc73xx_write(vsc, block, subblock, reg, tmp);
+ return vsc->ops->write(vsc, block, subblock, reg, tmp);
}
static int vsc73xx_detect(struct vsc73xx *vsc)
@@ -512,7 +397,7 @@ static int vsc73xx_detect(struct vsc73xx *vsc)
int ret;
u32 id;
- ret = vsc73xx_read(vsc, VSC73XX_BLOCK_SYSTEM, 0,
+ ret = vsc->ops->read(vsc, VSC73XX_BLOCK_SYSTEM, 0,
VSC73XX_ICPU_MBOX_VAL, &val);
if (ret) {
dev_err(vsc->dev, "unable to read mailbox (%d)\n", ret);
@@ -530,7 +415,7 @@ static int vsc73xx_detect(struct vsc73xx *vsc)
/* Wait 20ms according to datasheet table 245 */
msleep(20);
- ret = vsc73xx_read(vsc, VSC73XX_BLOCK_SYSTEM, 0,
+ ret = vsc->ops->read(vsc, VSC73XX_BLOCK_SYSTEM, 0,
VSC73XX_ICPU_MBOX_VAL, &val);
if (val == 0xffffffff) {
dev_err(vsc->dev, "seems not to help, giving up\n");
@@ -538,7 +423,7 @@ static int vsc73xx_detect(struct vsc73xx *vsc)
}
}
- ret = vsc73xx_read(vsc, VSC73XX_BLOCK_SYSTEM, 0,
+ ret = vsc->ops->read(vsc, VSC73XX_BLOCK_SYSTEM, 0,
VSC73XX_CHIPID, &val);
if (ret) {
dev_err(vsc->dev, "unable to read chip id (%d)\n", ret);
@@ -563,7 +448,7 @@ static int vsc73xx_detect(struct vsc73xx *vsc)
VSC73XX_CHIPID_REV_MASK;
dev_info(vsc->dev, "VSC%04X (rev: %d) switch found\n", id, rev);
- ret = vsc73xx_read(vsc, VSC73XX_BLOCK_SYSTEM, 0,
+ ret = vsc->ops->read(vsc, VSC73XX_BLOCK_SYSTEM, 0,
VSC73XX_ICPU_CTRL, &val);
if (ret) {
dev_err(vsc->dev, "unable to read iCPU control\n");
@@ -611,11 +496,11 @@ static int vsc73xx_phy_read(struct dsa_switch *ds, int phy, int regnum)
/* Setting bit 26 means "read" */
cmd = BIT(26) | (phy << 21) | (regnum << 16);
- ret = vsc73xx_write(vsc, VSC73XX_BLOCK_MII, 0, 1, cmd);
+ ret = vsc->ops->write(vsc, VSC73XX_BLOCK_MII, 0, 1, cmd);
if (ret)
return ret;
msleep(2);
- ret = vsc73xx_read(vsc, VSC73XX_BLOCK_MII, 0, 2, &val);
+ ret = vsc->ops->read(vsc, VSC73XX_BLOCK_MII, 0, 2, &val);
if (ret)
return ret;
if (val & BIT(16)) {
@@ -650,7 +535,7 @@ static int vsc73xx_phy_write(struct dsa_switch *ds, int phy, int regnum,
}
cmd = (phy << 21) | (regnum << 16);
- ret = vsc73xx_write(vsc, VSC73XX_BLOCK_MII, 0, 1, cmd);
+ ret = vsc->ops->write(vsc, VSC73XX_BLOCK_MII, 0, 1, cmd);
if (ret)
return ret;
@@ -682,7 +567,7 @@ static int vsc73xx_setup(struct dsa_switch *ds)
dev_info(vsc->dev, "set up the switch\n");
/* Issue RESET */
- vsc73xx_write(vsc, VSC73XX_BLOCK_SYSTEM, 0, VSC73XX_GLORESET,
+ vsc->ops->write(vsc, VSC73XX_BLOCK_SYSTEM, 0, VSC73XX_GLORESET,
VSC73XX_GLORESET_MASTER_RESET);
usleep_range(125, 200);
@@ -695,7 +580,7 @@ static int vsc73xx_setup(struct dsa_switch *ds)
*/
for (i = 0; i <= 15; i++) {
if (i != 6 && i != 7) {
- vsc73xx_write(vsc, VSC73XX_BLOCK_MEMINIT,
+ vsc->ops->write(vsc, VSC73XX_BLOCK_MEMINIT,
2,
0, 0x1010400 + i);
mdelay(1);
@@ -704,12 +589,12 @@ static int vsc73xx_setup(struct dsa_switch *ds)
mdelay(30);
/* Clear MAC table */
- vsc73xx_write(vsc, VSC73XX_BLOCK_ANALYZER, 0,
+ vsc->ops->write(vsc, VSC73XX_BLOCK_ANALYZER, 0,
VSC73XX_MACACCESS,
VSC73XX_MACACCESS_CMD_CLEAR_TABLE);
/* Clear VLAN table */
- vsc73xx_write(vsc, VSC73XX_BLOCK_ANALYZER, 0,
+ vsc->ops->write(vsc, VSC73XX_BLOCK_ANALYZER, 0,
VSC73XX_VLANACCESS,
VSC73XX_VLANACCESS_VLAN_TBL_CMD_CLEAR_TABLE);
@@ -721,7 +606,7 @@ static int vsc73xx_setup(struct dsa_switch *ds)
* Port "31" is "all ports".
*/
if (IS_739X(vsc))
- vsc73xx_write(vsc, VSC73XX_BLOCK_MAC, 0x1f,
+ vsc->ops->write(vsc, VSC73XX_BLOCK_MAC, 0x1f,
VSC73XX_Q_MISC_CONF,
VSC73XX_Q_MISC_CONF_EXTENT_MEM);
@@ -729,25 +614,25 @@ static int vsc73xx_setup(struct dsa_switch *ds)
for (i = 0; i < 7; i++) {
if (i == 5)
continue;
- vsc73xx_write(vsc, VSC73XX_BLOCK_MAC, 4,
+ vsc->ops->write(vsc, VSC73XX_BLOCK_MAC, 4,
VSC73XX_MAC_CFG, VSC73XX_MAC_CFG_RESET);
}
/* MII delay, set both GTX and RX delay to 2 ns */
- vsc73xx_write(vsc, VSC73XX_BLOCK_SYSTEM, 0, VSC73XX_GMIIDELAY,
+ vsc->ops->write(vsc, VSC73XX_BLOCK_SYSTEM, 0, VSC73XX_GMIIDELAY,
VSC73XX_GMIIDELAY_GMII0_GTXDELAY_2_0_NS |
VSC73XX_GMIIDELAY_GMII0_RXDELAY_2_0_NS);
/* Enable reception of frames on all ports */
- vsc73xx_write(vsc, VSC73XX_BLOCK_ANALYZER, 0, VSC73XX_RECVMASK,
+ vsc->ops->write(vsc, VSC73XX_BLOCK_ANALYZER, 0, VSC73XX_RECVMASK,
0x5f);
/* IP multicast flood mask (table 144) */
- vsc73xx_write(vsc, VSC73XX_BLOCK_ANALYZER, 0, VSC73XX_IFLODMSK,
+ vsc->ops->write(vsc, VSC73XX_BLOCK_ANALYZER, 0, VSC73XX_IFLODMSK,
0xff);
mdelay(50);
/* Release reset from the internal PHYs */
- vsc73xx_write(vsc, VSC73XX_BLOCK_SYSTEM, 0, VSC73XX_GLORESET,
+ vsc->ops->write(vsc, VSC73XX_BLOCK_SYSTEM, 0, VSC73XX_GLORESET,
VSC73XX_GLORESET_PHY_RESET);
udelay(4);
@@ -760,7 +645,7 @@ static void vsc73xx_init_port(struct vsc73xx *vsc, int port)
u32 val;
/* MAC configure, first reset the port and then write defaults */
- vsc73xx_write(vsc, VSC73XX_BLOCK_MAC,
+ vsc->ops->write(vsc, VSC73XX_BLOCK_MAC,
port,
VSC73XX_MAC_CFG,
VSC73XX_MAC_CFG_RESET);
@@ -774,7 +659,7 @@ static void vsc73xx_init_port(struct vsc73xx *vsc, int port)
else
val = VSC73XX_MAC_CFG_1000M_F_PHY;
- vsc73xx_write(vsc, VSC73XX_BLOCK_MAC,
+ vsc->ops->write(vsc, VSC73XX_BLOCK_MAC,
port,
VSC73XX_MAC_CFG,
val |
@@ -787,7 +672,7 @@ static void vsc73xx_init_port(struct vsc73xx *vsc, int port)
* frames, so just enable it. It is clear from the application note
* that "9.6 kilobytes" == 9600 bytes.
*/
- vsc73xx_write(vsc, VSC73XX_BLOCK_MAC,
+ vsc->ops->write(vsc, VSC73XX_BLOCK_MAC,
port,
VSC73XX_MAXLEN, 9600);
@@ -795,7 +680,7 @@ static void vsc73xx_init_port(struct vsc73xx *vsc, int port)
* Use a zero delay pause frame when pause condition is left
* Obey pause control frames
*/
- vsc73xx_write(vsc, VSC73XX_BLOCK_MAC,
+ vsc->ops->write(vsc, VSC73XX_BLOCK_MAC,
port,
VSC73XX_FCCONF,
VSC73XX_FCCONF_ZERO_PAUSE_EN |
@@ -811,19 +696,19 @@ static void vsc73xx_init_port(struct vsc73xx *vsc, int port)
else
val = VSC73XX_Q_MISC_CONF_MAC_PAUSE_MODE;
val |= VSC73XX_Q_MISC_CONF_EXTENT_MEM;
- vsc73xx_write(vsc, VSC73XX_BLOCK_MAC,
+ vsc->ops->write(vsc, VSC73XX_BLOCK_MAC,
port,
VSC73XX_Q_MISC_CONF,
val);
/* Flow control MAC: a MAC address used in flow control frames */
val = (vsc->addr[5] << 16) | (vsc->addr[4] << 8) | (vsc->addr[3]);
- vsc73xx_write(vsc, VSC73XX_BLOCK_MAC,
+ vsc->ops->write(vsc, VSC73XX_BLOCK_MAC,
port,
VSC73XX_FCMACHI,
val);
val = (vsc->addr[2] << 16) | (vsc->addr[1] << 8) | (vsc->addr[0]);
- vsc73xx_write(vsc, VSC73XX_BLOCK_MAC,
+ vsc->ops->write(vsc, VSC73XX_BLOCK_MAC,
port,
VSC73XX_FCMACLO,
val);
@@ -831,13 +716,13 @@ static void vsc73xx_init_port(struct vsc73xx *vsc, int port)
/* Tell the categorizer to forward pause frames, not control
* frame. Do not drop anything.
*/
- vsc73xx_write(vsc, VSC73XX_BLOCK_MAC,
+ vsc->ops->write(vsc, VSC73XX_BLOCK_MAC,
port,
VSC73XX_CAT_DROP,
VSC73XX_CAT_DROP_FWD_PAUSE_ENA);
/* Clear all counters */
- vsc73xx_write(vsc, VSC73XX_BLOCK_MAC,
+ vsc->ops->write(vsc, VSC73XX_BLOCK_MAC,
port, VSC73XX_C_RX0, 0);
}
@@ -850,21 +735,21 @@ static void vsc73xx_adjust_enable_port(struct vsc73xx *vsc,
/* Reset this port FIXME: break out subroutine */
val |= VSC73XX_MAC_CFG_RESET;
- vsc73xx_write(vsc, VSC73XX_BLOCK_MAC, port, VSC73XX_MAC_CFG, val);
+ vsc->ops->write(vsc, VSC73XX_BLOCK_MAC, port, VSC73XX_MAC_CFG, val);
/* Seed the port randomness with randomness */
get_random_bytes(&seed, 1);
val |= seed << VSC73XX_MAC_CFG_SEED_OFFSET;
val |= VSC73XX_MAC_CFG_SEED_LOAD;
val |= VSC73XX_MAC_CFG_WEXC_DIS;
- vsc73xx_write(vsc, VSC73XX_BLOCK_MAC, port, VSC73XX_MAC_CFG, val);
+ vsc->ops->write(vsc, VSC73XX_BLOCK_MAC, port, VSC73XX_MAC_CFG, val);
/* Flow control for the PHY facing ports:
* Use a zero delay pause frame when pause condition is left
* Obey pause control frames
* When generating pause frames, use 0xff as pause value
*/
- vsc73xx_write(vsc, VSC73XX_BLOCK_MAC, port, VSC73XX_FCCONF,
+ vsc->ops->write(vsc, VSC73XX_BLOCK_MAC, port, VSC73XX_FCCONF,
VSC73XX_FCCONF_ZERO_PAUSE_EN |
VSC73XX_FCCONF_FLOW_CTRL_OBEY |
0xff);
@@ -895,7 +780,7 @@ static void vsc73xx_adjust_link(struct dsa_switch *ds, int port,
* Enable the GMII GTX external clock
* Use double data rate (DDR mode)
*/
- vsc73xx_write(vsc, VSC73XX_BLOCK_MAC,
+ vsc->ops->write(vsc, VSC73XX_BLOCK_MAC,
CPU_PORT,
VSC73XX_ADVPORTM,
VSC73XX_ADVPORTM_EXT_PORT |
@@ -922,11 +807,11 @@ static void vsc73xx_adjust_link(struct dsa_switch *ds, int port,
VSC73XX_ARBDISC, BIT(port), BIT(port));
/* Wait until queue is empty */
- vsc73xx_read(vsc, VSC73XX_BLOCK_ARBITER, 0,
+ vsc->ops->read(vsc, VSC73XX_BLOCK_ARBITER, 0,
VSC73XX_ARBEMPTY, &val);
while (!(val & BIT(port))) {
msleep(1);
- vsc73xx_read(vsc, VSC73XX_BLOCK_ARBITER, 0,
+ vsc->ops->read(vsc, VSC73XX_BLOCK_ARBITER, 0,
VSC73XX_ARBEMPTY, &val);
if (--maxloop == 0) {
dev_err(vsc->dev,
@@ -937,7 +822,7 @@ static void vsc73xx_adjust_link(struct dsa_switch *ds, int port,
}
/* Put this port into reset */
- vsc73xx_write(vsc, VSC73XX_BLOCK_MAC, port, VSC73XX_MAC_CFG,
+ vsc->ops->write(vsc, VSC73XX_BLOCK_MAC, port, VSC73XX_MAC_CFG,
VSC73XX_MAC_CFG_RESET);
/* Accept packets again */
@@ -1018,7 +903,7 @@ static void vsc73xx_port_disable(struct dsa_switch *ds, int port)
struct vsc73xx *vsc = ds->priv;
/* Just put the port into reset */
- vsc73xx_write(vsc, VSC73XX_BLOCK_MAC, port,
+ vsc->ops->write(vsc, VSC73XX_BLOCK_MAC, port,
VSC73XX_MAC_CFG, VSC73XX_MAC_CFG_RESET);
}
@@ -1063,7 +948,7 @@ static void vsc73xx_get_strings(struct dsa_switch *ds, int port, u32 stringset,
if (stringset != ETH_SS_STATS)
return;
- ret = vsc73xx_read(vsc, VSC73XX_BLOCK_MAC, port,
+ ret = vsc->ops->read(vsc, VSC73XX_BLOCK_MAC, port,
VSC73XX_C_CFG, &val);
if (ret)
return;
@@ -1137,7 +1022,7 @@ static void vsc73xx_get_ethtool_stats(struct dsa_switch *ds, int port,
int i;
for (i = 0; i < ARRAY_SIZE(regs); i++) {
- ret = vsc73xx_read(vsc, VSC73XX_BLOCK_MAC, port,
+ ret = vsc->ops->read(vsc, VSC73XX_BLOCK_MAC, port,
regs[i], &val);
if (ret) {
dev_err(vsc->dev, "error reading counter %d\n", i);
@@ -1166,7 +1051,7 @@ static int vsc73xx_gpio_get(struct gpio_chip *chip, unsigned int offset)
u32 val;
int ret;
- ret = vsc73xx_read(vsc, VSC73XX_BLOCK_SYSTEM, 0,
+ ret = vsc->ops->read(vsc, VSC73XX_BLOCK_SYSTEM, 0,
VSC73XX_GPIO, &val);
if (ret)
return ret;
@@ -1212,7 +1097,7 @@ static int vsc73xx_gpio_get_direction(struct gpio_chip *chip,
u32 val;
int ret;
- ret = vsc73xx_read(vsc, VSC73XX_BLOCK_SYSTEM, 0,
+ ret = vsc->ops->read(vsc, VSC73XX_BLOCK_SYSTEM, 0,
VSC73XX_GPIO, &val);
if (ret)
return ret;
@@ -1245,42 +1130,25 @@ static int vsc73xx_gpio_probe(struct vsc73xx *vsc)
return 0;
}
-static int vsc73xx_probe(struct spi_device *spi)
+int vsc73xx_probe(struct vsc73xx *vsc)
{
- struct device *dev = &spi->dev;
- struct vsc73xx *vsc;
int ret;
- vsc = devm_kzalloc(dev, sizeof(*vsc), GFP_KERNEL);
- if (!vsc)
- return -ENOMEM;
-
- spi_set_drvdata(spi, vsc);
- vsc->spi = spi_dev_get(spi);
- vsc->dev = dev;
mutex_init(&vsc->lock);
/* Release reset, if any */
- vsc->reset = devm_gpiod_get_optional(dev, "reset", GPIOD_OUT_LOW);
+ vsc->reset = devm_gpiod_get_optional(vsc->dev, "reset", GPIOD_OUT_LOW);
if (IS_ERR(vsc->reset)) {
- dev_err(dev, "failed to get RESET GPIO\n");
+ dev_err(vsc->dev, "failed to get RESET GPIO\n");
return PTR_ERR(vsc->reset);
}
if (vsc->reset)
/* Wait 20ms according to datasheet table 245 */
msleep(20);
- spi->mode = SPI_MODE_0;
- spi->bits_per_word = 8;
- ret = spi_setup(spi);
- if (ret < 0) {
- dev_err(dev, "spi setup failed.\n");
- return ret;
- }
-
ret = vsc73xx_detect(vsc);
if (ret) {
- dev_err(dev, "no chip found (%d)\n", ret);
+ dev_err(vsc->dev, "no chip found (%d)\n", ret);
return -ENODEV;
}
@@ -1301,7 +1169,7 @@ static int vsc73xx_probe(struct spi_device *spi)
* We allocate 8 ports and avoid access to the nonexistant
* ports.
*/
- vsc->ds = dsa_switch_alloc(dev, 8);
+ vsc->ds = dsa_switch_alloc(vsc->dev, 8);
if (!vsc->ds)
return -ENOMEM;
vsc->ds->priv = vsc;
@@ -1309,7 +1177,7 @@ static int vsc73xx_probe(struct spi_device *spi)
vsc->ds->ops = &vsc73xx_ds_ops;
ret = dsa_register_switch(vsc->ds);
if (ret) {
- dev_err(dev, "unable to register switch (%d)\n", ret);
+ dev_err(vsc->dev, "unable to register switch (%d)\n", ret);
return ret;
}
@@ -1321,43 +1189,16 @@ static int vsc73xx_probe(struct spi_device *spi)
return 0;
}
+EXPORT_SYMBOL(vsc73xx_probe);
-static int vsc73xx_remove(struct spi_device *spi)
+int vsc73xx_remove(struct vsc73xx *vsc)
{
- struct vsc73xx *vsc = spi_get_drvdata(spi);
-
dsa_unregister_switch(vsc->ds);
gpiod_set_value(vsc->reset, 1);
return 0;
}
-
-static const struct of_device_id vsc73xx_of_match[] = {
- {
- .compatible = "vitesse,vsc7385",
- },
- {
- .compatible = "vitesse,vsc7388",
- },
- {
- .compatible = "vitesse,vsc7395",
- },
- {
- .compatible = "vitesse,vsc7398",
- },
- { },
-};
-MODULE_DEVICE_TABLE(of, vsc73xx_of_match);
-
-static struct spi_driver vsc73xx_driver = {
- .probe = vsc73xx_probe,
- .remove = vsc73xx_remove,
- .driver = {
- .name = "vsc73xx",
- .of_match_table = vsc73xx_of_match,
- },
-};
-module_spi_driver(vsc73xx_driver);
+EXPORT_SYMBOL(vsc73xx_remove);
MODULE_AUTHOR("Linus Walleij <linus.walleij@xxxxxxxxxx>");
MODULE_DESCRIPTION("Vitesse VSC7385/7388/7395/7398 driver");
diff --git a/drivers/net/dsa/vitesse-vsc73xx-spi.c b/drivers/net/dsa/vitesse-vsc73xx-spi.c
new file mode 100644
index 000000000000..dab8c0e69cf9
--- /dev/null
+++ b/drivers/net/dsa/vitesse-vsc73xx-spi.c
@@ -0,0 +1,201 @@
+// SPDX-License-Identifier: GPL-2.0
+/* DSA driver for:
+ * Vitesse VSC7385 SparX-G5 5+1-port Integrated Gigabit Ethernet Switch
+ * Vitesse VSC7388 SparX-G8 8-port Integrated Gigabit Ethernet Switch
+ * Vitesse VSC7395 SparX-G5e 5+1-port Integrated Gigabit Ethernet Switch
+ * Vitesse VSC7398 SparX-G8e 8-port Integrated Gigabit Ethernet Switch
+ *
+ * This driver takes control of the switch chip over SPI and
+ * configures it to route packages around when connected to a CPU port.
+ *
+ * Copyright (C) 2018 Linus Wallej <linus.walleij@xxxxxxxxxx>
+ * Includes portions of code from the firmware uploader by:
+ * Copyright (C) 2009 Gabor Juhos <juhosg@xxxxxxxxxxx>
+ */
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/spi/spi.h>
+
+#include "vitesse-vsc73xx.h"
+
+#define VSC73XX_CMD_SPI_MODE_READ 0
+#define VSC73XX_CMD_SPI_MODE_WRITE 1
+#define VSC73XX_CMD_SPI_MODE_SHIFT 4
+#define VSC73XX_CMD_SPI_BLOCK_SHIFT 5
+#define VSC73XX_CMD_SPI_BLOCK_MASK 0x7
+#define VSC73XX_CMD_SPI_SUBBLOCK_MASK 0xf
+
+/**
+ * struct vsc73xx_spi - VSC73xx SPI state container
+ */
+struct vsc73xx_spi {
+ struct spi_device *spi;
+ struct vsc73xx vsc;
+};
+
+static const struct vsc73xx_ops vsc73xx_spi_ops;
+
+static u8 vsc73xx_make_addr(u8 mode, u8 block, u8 subblock)
+{
+ u8 ret;
+
+ ret = (block & VSC73XX_CMD_SPI_BLOCK_MASK)
+ << VSC73XX_CMD_SPI_BLOCK_SHIFT;
+ ret |= (mode & 1) << VSC73XX_CMD_SPI_MODE_SHIFT;
+ ret |= subblock & VSC73XX_CMD_SPI_SUBBLOCK_MASK;
+
+ return ret;
+}
+
+static int vsc73xx_spi_read(struct vsc73xx *vsc, u8 block, u8 subblock, u8 reg,
+ u32 *val)
+{
+ struct vsc73xx_spi *vsc_spi = vsc->priv;
+ struct spi_transfer t[2];
+ struct spi_message m;
+ u8 cmd[4];
+ u8 buf[4];
+ int ret;
+
+ if (!vsc73xx_is_addr_valid(block, subblock))
+ return -EINVAL;
+
+ spi_message_init(&m);
+
+ memset(&t, 0, sizeof(t));
+
+ t[0].tx_buf = cmd;
+ t[0].len = sizeof(cmd);
+ spi_message_add_tail(&t[0], &m);
+
+ t[1].rx_buf = buf;
+ t[1].len = sizeof(buf);
+ spi_message_add_tail(&t[1], &m);
+
+ cmd[0] = vsc73xx_make_addr(VSC73XX_CMD_SPI_MODE_READ, block, subblock);
+ cmd[1] = reg;
+ cmd[2] = 0;
+ cmd[3] = 0;
+
+ mutex_lock(&vsc->lock);
+ ret = spi_sync(vsc_spi->spi, &m);
+ mutex_unlock(&vsc->lock);
+
+ if (ret)
+ return ret;
+
+ *val = (buf[0] << 24) | (buf[1] << 16) | (buf[2] << 8) | buf[3];
+
+ return 0;
+}
+
+static int vsc73xx_spi_write(struct vsc73xx *vsc, u8 block, u8 subblock, u8 reg,
+ u32 val)
+{
+ struct vsc73xx_spi *vsc_spi = vsc->priv;
+ struct spi_transfer t[2];
+ struct spi_message m;
+ u8 cmd[2];
+ u8 buf[4];
+ int ret;
+
+ if (!vsc73xx_is_addr_valid(block, subblock))
+ return -EINVAL;
+
+ spi_message_init(&m);
+
+ memset(&t, 0, sizeof(t));
+
+ t[0].tx_buf = cmd;
+ t[0].len = sizeof(cmd);
+ spi_message_add_tail(&t[0], &m);
+
+ t[1].tx_buf = buf;
+ t[1].len = sizeof(buf);
+ spi_message_add_tail(&t[1], &m);
+
+ cmd[0] = vsc73xx_make_addr(VSC73XX_CMD_SPI_MODE_WRITE, block, subblock);
+ cmd[1] = reg;
+
+ buf[0] = (val >> 24) & 0xff;
+ buf[1] = (val >> 16) & 0xff;
+ buf[2] = (val >> 8) & 0xff;
+ buf[3] = val & 0xff;
+
+ mutex_lock(&vsc->lock);
+ ret = spi_sync(vsc_spi->spi, &m);
+ mutex_unlock(&vsc->lock);
+
+ return ret;
+}
+
+static int vsc73xx_spi_probe(struct spi_device *spi)
+{
+ struct device *dev = &spi->dev;
+ struct vsc73xx_spi *vsc_spi;
+ int ret;
+
+ vsc_spi = devm_kzalloc(dev, sizeof(*vsc_spi), GFP_KERNEL);
+ if (!vsc_spi)
+ return -ENOMEM;
+
+ spi_set_drvdata(spi, vsc_spi);
+ vsc_spi->spi = spi_dev_get(spi);
+ vsc_spi->vsc.dev = dev;
+ vsc_spi->vsc.priv = vsc_spi;
+ vsc_spi->vsc.ops = &vsc73xx_spi_ops;
+
+ spi->mode = SPI_MODE_0;
+ spi->bits_per_word = 8;
+ ret = spi_setup(spi);
+ if (ret < 0) {
+ dev_err(dev, "spi setup failed.\n");
+ return ret;
+ }
+
+ return vsc73xx_probe(&vsc_spi->vsc);
+}
+
+static int vsc73xx_spi_remove(struct spi_device *spi)
+{
+ struct vsc73xx_spi *vsc_spi = spi_get_drvdata(spi);
+
+ return vsc73xx_remove(&vsc_spi->vsc);
+}
+
+static const struct vsc73xx_ops vsc73xx_spi_ops = {
+ .read = vsc73xx_spi_read,
+ .write = vsc73xx_spi_write,
+};
+
+static const struct of_device_id vsc73xx_spi_of_match[] = {
+ {
+ .compatible = "vitesse,vsc7385-spi",
+ },
+ {
+ .compatible = "vitesse,vsc7388-spi",
+ },
+ {
+ .compatible = "vitesse,vsc7395-spi",
+ },
+ {
+ .compatible = "vitesse,vsc7398-spi",
+ },
+ { },
+};
+MODULE_DEVICE_TABLE(of, vsc73xx_spi_of_match);
+
+static struct spi_driver vsc73xx_spi_driver = {
+ .probe = vsc73xx_spi_probe,
+ .remove = vsc73xx_spi_remove,
+ .driver = {
+ .name = "vsc73xx-spi",
+ .of_match_table = vsc73xx_spi_of_match,
+ },
+};
+module_spi_driver(vsc73xx_spi_driver);
+
+MODULE_AUTHOR("Linus Walleij <linus.walleij@xxxxxxxxxx>");
+MODULE_DESCRIPTION("Vitesse VSC7385/7388/7395/7398 SPI driver");
+MODULE_LICENSE("GPL v2");
diff --git a/drivers/net/dsa/vitesse-vsc73xx.h b/drivers/net/dsa/vitesse-vsc73xx.h
new file mode 100644
index 000000000000..a0e2e5b8f0ce
--- /dev/null
+++ b/drivers/net/dsa/vitesse-vsc73xx.h
@@ -0,0 +1,30 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#include <linux/device.h>
+#include <linux/etherdevice.h>
+#include <linux/gpio/driver.h>
+
+/**
+ * struct vsc73xx - VSC73xx state container
+ */
+struct vsc73xx {
+ struct device *dev;
+ struct gpio_desc *reset;
+ struct dsa_switch *ds;
+ struct gpio_chip gc;
+ u16 chipid;
+ u8 addr[ETH_ALEN];
+ struct mutex lock; /* Protects SPI traffic */
+ const struct vsc73xx_ops *ops;
+ void *priv;
+};
+
+struct vsc73xx_ops {
+ int (*read)(struct vsc73xx *vsc, u8 block, u8 subblock, u8 reg,
+ u32 *val);
+ int (*write)(struct vsc73xx *vsc, u8 block, u8 subblock, u8 reg,
+ u32 val);
+};
+
+int vsc73xx_is_addr_valid(u8 block, u8 subblock);
+int vsc73xx_probe(struct vsc73xx *vsc);
+int vsc73xx_remove(struct vsc73xx *vsc);
--
2.20.1