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Commit 17e708ba authored by Vivien Didelot's avatar Vivien Didelot Committed by David S. Miller
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net: dsa: mv88e6xxx: add a soft reset operation 

Marvell chips have different way to issue a software reset.

Old chips (such as 88E6060) have a reset bit in an ATU control register.

Newer chips moved this bit in a Global control register. Chips with
controllable PPU should reset the PPU when resetting the switch.

Add a new reset operation to implement these differences and introduce a
mv88e6xxx_software_reset() helper to wrap it conveniently.
Signed-off-by: default avatarVivien Didelot <vivien.didelot@savoirfairelinux.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 309eca6d
Hide whitespace changes
Inline Side-by-side
Showing with 172 additions and 40 deletions
drivers/net/dsa/mv88e6xxx/chip.c
View file @ 17e708ba
......@@ -545,7 +545,8 @@ static int mv88e6xxx_ppu_disable(struct mv88e6xxx_chip *chip)
return err;
usleep_range(1000, 2000);
if ((val & GLOBAL_STATUS_PPU_MASK) != GLOBAL_STATUS_PPU_POLLING)
val &= GLOBAL_STATUS_PPU_STATE_MASK;
if (val != GLOBAL_STATUS_PPU_STATE_POLLING)
return 0;
}
......@@ -572,7 +573,8 @@ static int mv88e6xxx_ppu_enable(struct mv88e6xxx_chip *chip)
return err;
usleep_range(1000, 2000);
if ((val & GLOBAL_STATUS_PPU_MASK) == GLOBAL_STATUS_PPU_POLLING)
val &= GLOBAL_STATUS_PPU_STATE_MASK;
if (val == GLOBAL_STATUS_PPU_STATE_POLLING)
return 0;
}
......@@ -2356,6 +2358,14 @@ static void mv88e6xxx_port_bridge_leave(struct dsa_switch *ds, int port)
mutex_unlock(&chip->reg_lock);
}
static int mv88e6xxx_software_reset(struct mv88e6xxx_chip *chip)
{
if (chip->info->ops->reset)
return chip->info->ops->reset(chip);
return 0;
}
static void mv88e6xxx_hardware_reset(struct mv88e6xxx_chip *chip)
{
struct gpio_desc *gpiod = chip->reset;
......@@ -2391,10 +2401,6 @@ static int mv88e6xxx_disable_ports(struct mv88e6xxx_chip *chip)
static int mv88e6xxx_switch_reset(struct mv88e6xxx_chip *chip)
{
bool ppu_active = mv88e6xxx_has(chip, MV88E6XXX_FLAG_PPU_ACTIVE);
u16 is_reset = (ppu_active ? 0x8800 : 0xc800);
unsigned long timeout;
u16 reg;
int err;
err = mv88e6xxx_disable_ports(chip);
......@@ -2403,34 +2409,7 @@ static int mv88e6xxx_switch_reset(struct mv88e6xxx_chip *chip)
mv88e6xxx_hardware_reset(chip);
/* Reset the switch. Keep the PPU active if requested. The PPU
* needs to be active to support indirect phy register access
* through global registers 0x18 and 0x19.
*/
if (ppu_active)
err = mv88e6xxx_g1_write(chip, 0x04, 0xc000);
else
err = mv88e6xxx_g1_write(chip, 0x04, 0xc400);
if (err)
return err;
/* Wait up to one second for reset to complete. */
timeout = jiffies + 1 * HZ;
while (time_before(jiffies, timeout)) {
err = mv88e6xxx_g1_read(chip, 0x00, &reg);
if (err)
return err;
if ((reg & is_reset) == is_reset)
break;
usleep_range(1000, 2000);
}
if (time_after(jiffies, timeout))
err = -ETIMEDOUT;
else
err = 0;
return err;
return mv88e6xxx_software_reset(chip);
}
static int mv88e6xxx_serdes_power_on(struct mv88e6xxx_chip *chip)
......@@ -3244,6 +3223,7 @@ static const struct mv88e6xxx_ops mv88e6085_ops = {
.g1_set_cpu_port = mv88e6095_g1_set_cpu_port,
.g1_set_egress_port = mv88e6095_g1_set_egress_port,
.mgmt_rsvd2cpu = mv88e6095_g2_mgmt_rsvd2cpu,
.reset = mv88e6185_g1_reset,
};
static const struct mv88e6xxx_ops mv88e6095_ops = {
......@@ -3261,6 +3241,7 @@ static const struct mv88e6xxx_ops mv88e6095_ops = {
.stats_get_strings = mv88e6095_stats_get_strings,
.stats_get_stats = mv88e6095_stats_get_stats,
.mgmt_rsvd2cpu = mv88e6095_g2_mgmt_rsvd2cpu,
.reset = mv88e6185_g1_reset,
};
static const struct mv88e6xxx_ops mv88e6097_ops = {
......@@ -3285,6 +3266,7 @@ static const struct mv88e6xxx_ops mv88e6097_ops = {
.g1_set_cpu_port = mv88e6095_g1_set_cpu_port,
.g1_set_egress_port = mv88e6095_g1_set_egress_port,
.mgmt_rsvd2cpu = mv88e6095_g2_mgmt_rsvd2cpu,
.reset = mv88e6352_g1_reset,
};
static const struct mv88e6xxx_ops mv88e6123_ops = {
......@@ -3304,6 +3286,7 @@ static const struct mv88e6xxx_ops mv88e6123_ops = {
.g1_set_cpu_port = mv88e6095_g1_set_cpu_port,
.g1_set_egress_port = mv88e6095_g1_set_egress_port,
.mgmt_rsvd2cpu = mv88e6095_g2_mgmt_rsvd2cpu,
.reset = mv88e6352_g1_reset,
};
static const struct mv88e6xxx_ops mv88e6131_ops = {
......@@ -3328,6 +3311,7 @@ static const struct mv88e6xxx_ops mv88e6131_ops = {
.g1_set_cpu_port = mv88e6095_g1_set_cpu_port,
.g1_set_egress_port = mv88e6095_g1_set_egress_port,
.mgmt_rsvd2cpu = mv88e6095_g2_mgmt_rsvd2cpu,
.reset = mv88e6185_g1_reset,
};
static const struct mv88e6xxx_ops mv88e6161_ops = {
......@@ -3352,6 +3336,7 @@ static const struct mv88e6xxx_ops mv88e6161_ops = {
.g1_set_cpu_port = mv88e6095_g1_set_cpu_port,
.g1_set_egress_port = mv88e6095_g1_set_egress_port,
.mgmt_rsvd2cpu = mv88e6095_g2_mgmt_rsvd2cpu,
.reset = mv88e6352_g1_reset,
};
static const struct mv88e6xxx_ops mv88e6165_ops = {
......@@ -3369,6 +3354,7 @@ static const struct mv88e6xxx_ops mv88e6165_ops = {
.g1_set_cpu_port = mv88e6095_g1_set_cpu_port,
.g1_set_egress_port = mv88e6095_g1_set_egress_port,
.mgmt_rsvd2cpu = mv88e6095_g2_mgmt_rsvd2cpu,
.reset = mv88e6352_g1_reset,
};
static const struct mv88e6xxx_ops mv88e6171_ops = {
......@@ -3394,6 +3380,7 @@ static const struct mv88e6xxx_ops mv88e6171_ops = {
.g1_set_cpu_port = mv88e6095_g1_set_cpu_port,
.g1_set_egress_port = mv88e6095_g1_set_egress_port,
.mgmt_rsvd2cpu = mv88e6095_g2_mgmt_rsvd2cpu,
.reset = mv88e6352_g1_reset,
};
static const struct mv88e6xxx_ops mv88e6172_ops = {
......@@ -3421,6 +3408,7 @@ static const struct mv88e6xxx_ops mv88e6172_ops = {
.g1_set_cpu_port = mv88e6095_g1_set_cpu_port,
.g1_set_egress_port = mv88e6095_g1_set_egress_port,
.mgmt_rsvd2cpu = mv88e6095_g2_mgmt_rsvd2cpu,
.reset = mv88e6352_g1_reset,
};
static const struct mv88e6xxx_ops mv88e6175_ops = {
......@@ -3446,6 +3434,7 @@ static const struct mv88e6xxx_ops mv88e6175_ops = {
.g1_set_cpu_port = mv88e6095_g1_set_cpu_port,
.g1_set_egress_port = mv88e6095_g1_set_egress_port,
.mgmt_rsvd2cpu = mv88e6095_g2_mgmt_rsvd2cpu,
.reset = mv88e6352_g1_reset,
};
static const struct mv88e6xxx_ops mv88e6176_ops = {
......@@ -3473,6 +3462,7 @@ static const struct mv88e6xxx_ops mv88e6176_ops = {
.g1_set_cpu_port = mv88e6095_g1_set_cpu_port,
.g1_set_egress_port = mv88e6095_g1_set_egress_port,
.mgmt_rsvd2cpu = mv88e6095_g2_mgmt_rsvd2cpu,
.reset = mv88e6352_g1_reset,
};
static const struct mv88e6xxx_ops mv88e6185_ops = {
......@@ -3493,6 +3483,7 @@ static const struct mv88e6xxx_ops mv88e6185_ops = {
.g1_set_cpu_port = mv88e6095_g1_set_cpu_port,
.g1_set_egress_port = mv88e6095_g1_set_egress_port,
.mgmt_rsvd2cpu = mv88e6095_g2_mgmt_rsvd2cpu,
.reset = mv88e6185_g1_reset,
};
static const struct mv88e6xxx_ops mv88e6190_ops = {
......@@ -3517,6 +3508,7 @@ static const struct mv88e6xxx_ops mv88e6190_ops = {
.g1_set_cpu_port = mv88e6390_g1_set_cpu_port,
.g1_set_egress_port = mv88e6390_g1_set_egress_port,
.mgmt_rsvd2cpu = mv88e6390_g1_mgmt_rsvd2cpu,
.reset = mv88e6352_g1_reset,
};
static const struct mv88e6xxx_ops mv88e6190x_ops = {
......@@ -3541,6 +3533,7 @@ static const struct mv88e6xxx_ops mv88e6190x_ops = {
.g1_set_cpu_port = mv88e6390_g1_set_cpu_port,
.g1_set_egress_port = mv88e6390_g1_set_egress_port,
.mgmt_rsvd2cpu = mv88e6390_g1_mgmt_rsvd2cpu,
.reset = mv88e6352_g1_reset,
};
static const struct mv88e6xxx_ops mv88e6191_ops = {
......@@ -3565,6 +3558,7 @@ static const struct mv88e6xxx_ops mv88e6191_ops = {
.g1_set_cpu_port = mv88e6390_g1_set_cpu_port,
.g1_set_egress_port = mv88e6390_g1_set_egress_port,
.mgmt_rsvd2cpu = mv88e6390_g1_mgmt_rsvd2cpu,
.reset = mv88e6352_g1_reset,
};
static const struct mv88e6xxx_ops mv88e6240_ops = {
......@@ -3592,6 +3586,7 @@ static const struct mv88e6xxx_ops mv88e6240_ops = {
.g1_set_cpu_port = mv88e6095_g1_set_cpu_port,
.g1_set_egress_port = mv88e6095_g1_set_egress_port,
.mgmt_rsvd2cpu = mv88e6095_g2_mgmt_rsvd2cpu,
.reset = mv88e6352_g1_reset,
};
static const struct mv88e6xxx_ops mv88e6290_ops = {
......@@ -3616,6 +3611,7 @@ static const struct mv88e6xxx_ops mv88e6290_ops = {
.g1_set_cpu_port = mv88e6390_g1_set_cpu_port,
.g1_set_egress_port = mv88e6390_g1_set_egress_port,
.mgmt_rsvd2cpu = mv88e6390_g1_mgmt_rsvd2cpu,
.reset = mv88e6352_g1_reset,
};
static const struct mv88e6xxx_ops mv88e6320_ops = {
......@@ -3642,6 +3638,7 @@ static const struct mv88e6xxx_ops mv88e6320_ops = {
.g1_set_cpu_port = mv88e6095_g1_set_cpu_port,
.g1_set_egress_port = mv88e6095_g1_set_egress_port,
.mgmt_rsvd2cpu = mv88e6095_g2_mgmt_rsvd2cpu,
.reset = mv88e6352_g1_reset,
};
static const struct mv88e6xxx_ops mv88e6321_ops = {
......@@ -3667,6 +3664,7 @@ static const struct mv88e6xxx_ops mv88e6321_ops = {
.stats_get_stats = mv88e6320_stats_get_stats,
.g1_set_cpu_port = mv88e6095_g1_set_cpu_port,
.g1_set_egress_port = mv88e6095_g1_set_egress_port,
.reset = mv88e6352_g1_reset,
};
static const struct mv88e6xxx_ops mv88e6350_ops = {
......@@ -3692,6 +3690,7 @@ static const struct mv88e6xxx_ops mv88e6350_ops = {
.g1_set_cpu_port = mv88e6095_g1_set_cpu_port,
.g1_set_egress_port = mv88e6095_g1_set_egress_port,
.mgmt_rsvd2cpu = mv88e6095_g2_mgmt_rsvd2cpu,
.reset = mv88e6352_g1_reset,
};
static const struct mv88e6xxx_ops mv88e6351_ops = {
......@@ -3717,6 +3716,7 @@ static const struct mv88e6xxx_ops mv88e6351_ops = {
.g1_set_cpu_port = mv88e6095_g1_set_cpu_port,
.g1_set_egress_port = mv88e6095_g1_set_egress_port,
.mgmt_rsvd2cpu = mv88e6095_g2_mgmt_rsvd2cpu,
.reset = mv88e6352_g1_reset,
};
static const struct mv88e6xxx_ops mv88e6352_ops = {
......@@ -3744,6 +3744,7 @@ static const struct mv88e6xxx_ops mv88e6352_ops = {
.g1_set_cpu_port = mv88e6095_g1_set_cpu_port,
.g1_set_egress_port = mv88e6095_g1_set_egress_port,
.mgmt_rsvd2cpu = mv88e6095_g2_mgmt_rsvd2cpu,
.reset = mv88e6352_g1_reset,
};
static const struct mv88e6xxx_ops mv88e6390_ops = {
......@@ -3770,6 +3771,7 @@ static const struct mv88e6xxx_ops mv88e6390_ops = {
.g1_set_cpu_port = mv88e6390_g1_set_cpu_port,
.g1_set_egress_port = mv88e6390_g1_set_egress_port,
.mgmt_rsvd2cpu = mv88e6390_g1_mgmt_rsvd2cpu,
.reset = mv88e6352_g1_reset,
};
static const struct mv88e6xxx_ops mv88e6390x_ops = {
......@@ -3796,6 +3798,7 @@ static const struct mv88e6xxx_ops mv88e6390x_ops = {
.g1_set_cpu_port = mv88e6390_g1_set_cpu_port,
.g1_set_egress_port = mv88e6390_g1_set_egress_port,
.mgmt_rsvd2cpu = mv88e6390_g1_mgmt_rsvd2cpu,
.reset = mv88e6352_g1_reset,
};
static const struct mv88e6xxx_ops mv88e6391_ops = {
......@@ -3820,6 +3823,7 @@ static const struct mv88e6xxx_ops mv88e6391_ops = {
.g1_set_cpu_port = mv88e6390_g1_set_cpu_port,
.g1_set_egress_port = mv88e6390_g1_set_egress_port,
.mgmt_rsvd2cpu = mv88e6390_g1_mgmt_rsvd2cpu,
.reset = mv88e6352_g1_reset,
};
static int mv88e6xxx_verify_madatory_ops(struct mv88e6xxx_chip *chip,
......
drivers/net/dsa/mv88e6xxx/global1.c
View file @ 17e708ba
......@@ -33,6 +33,127 @@ int mv88e6xxx_g1_wait(struct mv88e6xxx_chip *chip, int reg, u16 mask)
return mv88e6xxx_wait(chip, chip->info->global1_addr, reg, mask);
}
/* Offset 0x00: Switch Global Status Register */
static int mv88e6185_g1_wait_ppu_polling(struct mv88e6xxx_chip *chip)
{
u16 state;
int i, err;
for (i = 0; i < 16; ++i) {
err = mv88e6xxx_g1_read(chip, GLOBAL_STATUS, &state);
if (err)
return err;
/* Check the value of the PPUState bits 15:14 */
state &= GLOBAL_STATUS_PPU_STATE_MASK;
if (state == GLOBAL_STATUS_PPU_STATE_POLLING)
return 0;
usleep_range(1000, 2000);
}
return -ETIMEDOUT;
}
static int mv88e6352_g1_wait_ppu_polling(struct mv88e6xxx_chip *chip)
{
u16 state;
int i, err;
for (i = 0; i < 16; ++i) {
err = mv88e6xxx_g1_read(chip, GLOBAL_STATUS, &state);
if (err)
return err;
/* Check the value of the PPUState (or InitState) bit 15 */
if (state & GLOBAL_STATUS_PPU_STATE)
return 0;
usleep_range(1000, 2000);
}
return -ETIMEDOUT;
}
static int mv88e6xxx_g1_wait_init_ready(struct mv88e6xxx_chip *chip)
{
const unsigned long timeout = jiffies + 1 * HZ;
u16 val;
int err;
/* Wait up to 1 second for the switch to be ready. The InitReady bit 11
* is set to a one when all units inside the device (ATU, VTU, etc.)
* have finished their initialization and are ready to accept frames.
*/
while (time_before(jiffies, timeout)) {
err = mv88e6xxx_g1_read(chip, GLOBAL_STATUS, &val);
if (err)
return err;
if (val & GLOBAL_STATUS_INIT_READY)
break;
usleep_range(1000, 2000);
}
if (time_after(jiffies, timeout))
return -ETIMEDOUT;
return 0;
}
/* Offset 0x04: Switch Global Control Register */
int mv88e6185_g1_reset(struct mv88e6xxx_chip *chip)
{
u16 val;
int err;
/* Set the SWReset bit 15 along with the PPUEn bit 14, to also restart
* the PPU, including re-doing PHY detection and initialization
*/
err = mv88e6xxx_g1_read(chip, GLOBAL_CONTROL, &val);
if (err)
return err;
val |= GLOBAL_CONTROL_SW_RESET;
val |= GLOBAL_CONTROL_PPU_ENABLE;
err = mv88e6xxx_g1_write(chip, GLOBAL_CONTROL, val);
if (err)
return err;
err = mv88e6xxx_g1_wait_init_ready(chip);
if (err)
return err;
return mv88e6185_g1_wait_ppu_polling(chip);
}
int mv88e6352_g1_reset(struct mv88e6xxx_chip *chip)
{
u16 val;
int err;
/* Set the SWReset bit 15 */
err = mv88e6xxx_g1_read(chip, GLOBAL_CONTROL, &val);
if (err)
return err;
val |= GLOBAL_CONTROL_SW_RESET;
err = mv88e6xxx_g1_write(chip, GLOBAL_CONTROL, val);
if (err)
return err;
err = mv88e6xxx_g1_wait_init_ready(chip);
if (err)
return err;
return mv88e6352_g1_wait_ppu_polling(chip);
}
/* Offset 0x1a: Monitor Control */
/* Offset 0x1a: Monitor & MGMT Control on some devices */
......
drivers/net/dsa/mv88e6xxx/global1.h
View file @ 17e708ba
......@@ -19,6 +19,10 @@
int mv88e6xxx_g1_read(struct mv88e6xxx_chip *chip, int reg, u16 *val);
int mv88e6xxx_g1_write(struct mv88e6xxx_chip *chip, int reg, u16 val);
int mv88e6xxx_g1_wait(struct mv88e6xxx_chip *chip, int reg, u16 mask);
int mv88e6185_g1_reset(struct mv88e6xxx_chip *chip);
int mv88e6352_g1_reset(struct mv88e6xxx_chip *chip);
int mv88e6xxx_g1_stats_wait(struct mv88e6xxx_chip *chip);
int mv88e6xxx_g1_stats_snapshot(struct mv88e6xxx_chip *chip, int port);
int mv88e6320_g1_stats_snapshot(struct mv88e6xxx_chip *chip, int port);
......
drivers/net/dsa/mv88e6xxx/mv88e6xxx.h
View file @ 17e708ba
......@@ -193,12 +193,12 @@
#define GLOBAL_STATUS 0x00
#define GLOBAL_STATUS_PPU_STATE BIT(15) /* 6351 and 6171 */
/* Two bits for 6165, 6185 etc */
#define GLOBAL_STATUS_PPU_MASK (0x3 << 14)
#define GLOBAL_STATUS_PPU_DISABLED_RST (0x0 << 14)
#define GLOBAL_STATUS_PPU_INITIALIZING (0x1 << 14)
#define GLOBAL_STATUS_PPU_DISABLED (0x2 << 14)
#define GLOBAL_STATUS_PPU_POLLING (0x3 << 14)
#define GLOBAL_STATUS_PPU_STATE_MASK (0x3 << 14) /* 6165 6185 */
#define GLOBAL_STATUS_PPU_STATE_DISABLED_RST (0x0 << 14)
#define GLOBAL_STATUS_PPU_STATE_INITIALIZING (0x1 << 14)
#define GLOBAL_STATUS_PPU_STATE_DISABLED (0x2 << 14)
#define GLOBAL_STATUS_PPU_STATE_POLLING (0x3 << 14)
#define GLOBAL_STATUS_INIT_READY BIT(11)
#define GLOBAL_STATUS_IRQ_AVB 8
#define GLOBAL_STATUS_IRQ_DEVICE 7
#define GLOBAL_STATUS_IRQ_STATS 6
......@@ -792,6 +792,9 @@ struct mv88e6xxx_ops {
int (*phy_write)(struct mv88e6xxx_chip *chip, int addr, int reg,
u16 val);
/* Switch Software Reset */
int (*reset)(struct mv88e6xxx_chip *chip);
/* RGMII Receive/Transmit Timing Control
* Add delay on PHY_INTERFACE_MODE_RGMII_*ID, no delay otherwise.
*/
......
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