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rtl8366rb.c
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rtl8366rb.c
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// SPDX-License-Identifier: GPL-2.0
/* Realtek SMI subdriver for the Realtek RTL8366RB ethernet switch
*
* This is a sparsely documented chip, the only viable documentation seems
* to be a patched up code drop from the vendor that appear in various
* GPL source trees.
*
* Copyright (C) 2017 Linus Walleij <linus.walleij@linaro.org>
* Copyright (C) 2009-2010 Gabor Juhos <juhosg@openwrt.org>
* Copyright (C) 2010 Antti Seppälä <a.seppala@gmail.com>
* Copyright (C) 2010 Roman Yeryomin <roman@advem.lv>
* Copyright (C) 2011 Colin Leitner <colin.leitner@googlemail.com>
*/
#include <linux/bitops.h>
#include <linux/etherdevice.h>
#include <linux/interrupt.h>
#include <linux/irqdomain.h>
#include <linux/irqchip/chained_irq.h>
#include <linux/of_irq.h>
#include <linux/regmap.h>
#include "realtek-smi-core.h"
#define RTL8366RB_PORT_NUM_CPU 5
#define RTL8366RB_NUM_PORTS 6
#define RTL8366RB_PHY_NO_MAX 4
#define RTL8366RB_PHY_ADDR_MAX 31
/* Switch Global Configuration register */
#define RTL8366RB_SGCR 0x0000
#define RTL8366RB_SGCR_EN_BC_STORM_CTRL BIT(0)
#define RTL8366RB_SGCR_MAX_LENGTH(a) ((a) << 4)
#define RTL8366RB_SGCR_MAX_LENGTH_MASK RTL8366RB_SGCR_MAX_LENGTH(0x3)
#define RTL8366RB_SGCR_MAX_LENGTH_1522 RTL8366RB_SGCR_MAX_LENGTH(0x0)
#define RTL8366RB_SGCR_MAX_LENGTH_1536 RTL8366RB_SGCR_MAX_LENGTH(0x1)
#define RTL8366RB_SGCR_MAX_LENGTH_1552 RTL8366RB_SGCR_MAX_LENGTH(0x2)
#define RTL8366RB_SGCR_MAX_LENGTH_16000 RTL8366RB_SGCR_MAX_LENGTH(0x3)
#define RTL8366RB_SGCR_EN_VLAN BIT(13)
#define RTL8366RB_SGCR_EN_VLAN_4KTB BIT(14)
/* Port Enable Control register */
#define RTL8366RB_PECR 0x0001
/* Switch Security Control registers */
#define RTL8366RB_SSCR0 0x0002
#define RTL8366RB_SSCR1 0x0003
#define RTL8366RB_SSCR2 0x0004
#define RTL8366RB_SSCR2_DROP_UNKNOWN_DA BIT(0)
/* Port Mode Control registers */
#define RTL8366RB_PMC0 0x0005
#define RTL8366RB_PMC0_SPI BIT(0)
#define RTL8366RB_PMC0_EN_AUTOLOAD BIT(1)
#define RTL8366RB_PMC0_PROBE BIT(2)
#define RTL8366RB_PMC0_DIS_BISR BIT(3)
#define RTL8366RB_PMC0_ADCTEST BIT(4)
#define RTL8366RB_PMC0_SRAM_DIAG BIT(5)
#define RTL8366RB_PMC0_EN_SCAN BIT(6)
#define RTL8366RB_PMC0_P4_IOMODE_SHIFT 7
#define RTL8366RB_PMC0_P4_IOMODE_MASK GENMASK(9, 7)
#define RTL8366RB_PMC0_P5_IOMODE_SHIFT 10
#define RTL8366RB_PMC0_P5_IOMODE_MASK GENMASK(12, 10)
#define RTL8366RB_PMC0_SDSMODE_SHIFT 13
#define RTL8366RB_PMC0_SDSMODE_MASK GENMASK(15, 13)
#define RTL8366RB_PMC1 0x0006
/* Port Mirror Control Register */
#define RTL8366RB_PMCR 0x0007
#define RTL8366RB_PMCR_SOURCE_PORT(a) (a)
#define RTL8366RB_PMCR_SOURCE_PORT_MASK 0x000f
#define RTL8366RB_PMCR_MONITOR_PORT(a) ((a) << 4)
#define RTL8366RB_PMCR_MONITOR_PORT_MASK 0x00f0
#define RTL8366RB_PMCR_MIRROR_RX BIT(8)
#define RTL8366RB_PMCR_MIRROR_TX BIT(9)
#define RTL8366RB_PMCR_MIRROR_SPC BIT(10)
#define RTL8366RB_PMCR_MIRROR_ISO BIT(11)
/* bits 0..7 = port 0, bits 8..15 = port 1 */
#define RTL8366RB_PAACR0 0x0010
/* bits 0..7 = port 2, bits 8..15 = port 3 */
#define RTL8366RB_PAACR1 0x0011
/* bits 0..7 = port 4, bits 8..15 = port 5 */
#define RTL8366RB_PAACR2 0x0012
#define RTL8366RB_PAACR_SPEED_10M 0
#define RTL8366RB_PAACR_SPEED_100M 1
#define RTL8366RB_PAACR_SPEED_1000M 2
#define RTL8366RB_PAACR_FULL_DUPLEX BIT(2)
#define RTL8366RB_PAACR_LINK_UP BIT(4)
#define RTL8366RB_PAACR_TX_PAUSE BIT(5)
#define RTL8366RB_PAACR_RX_PAUSE BIT(6)
#define RTL8366RB_PAACR_AN BIT(7)
#define RTL8366RB_PAACR_CPU_PORT (RTL8366RB_PAACR_SPEED_1000M | \
RTL8366RB_PAACR_FULL_DUPLEX | \
RTL8366RB_PAACR_LINK_UP | \
RTL8366RB_PAACR_TX_PAUSE | \
RTL8366RB_PAACR_RX_PAUSE)
/* bits 0..7 = port 0, bits 8..15 = port 1 */
#define RTL8366RB_PSTAT0 0x0014
/* bits 0..7 = port 2, bits 8..15 = port 3 */
#define RTL8366RB_PSTAT1 0x0015
/* bits 0..7 = port 4, bits 8..15 = port 5 */
#define RTL8366RB_PSTAT2 0x0016
#define RTL8366RB_POWER_SAVING_REG 0x0021
/* CPU port control reg */
#define RTL8368RB_CPU_CTRL_REG 0x0061
#define RTL8368RB_CPU_PORTS_MSK 0x00FF
/* Disables inserting custom tag length/type 0x8899 */
#define RTL8368RB_CPU_NO_TAG BIT(15)
#define RTL8366RB_SMAR0 0x0070 /* bits 0..15 */
#define RTL8366RB_SMAR1 0x0071 /* bits 16..31 */
#define RTL8366RB_SMAR2 0x0072 /* bits 32..47 */
#define RTL8366RB_RESET_CTRL_REG 0x0100
#define RTL8366RB_CHIP_CTRL_RESET_HW BIT(0)
#define RTL8366RB_CHIP_CTRL_RESET_SW BIT(1)
#define RTL8366RB_CHIP_ID_REG 0x0509
#define RTL8366RB_CHIP_ID_8366 0x5937
#define RTL8366RB_CHIP_VERSION_CTRL_REG 0x050A
#define RTL8366RB_CHIP_VERSION_MASK 0xf
/* PHY registers control */
#define RTL8366RB_PHY_ACCESS_CTRL_REG 0x8000
#define RTL8366RB_PHY_CTRL_READ BIT(0)
#define RTL8366RB_PHY_CTRL_WRITE 0
#define RTL8366RB_PHY_ACCESS_BUSY_REG 0x8001
#define RTL8366RB_PHY_INT_BUSY BIT(0)
#define RTL8366RB_PHY_EXT_BUSY BIT(4)
#define RTL8366RB_PHY_ACCESS_DATA_REG 0x8002
#define RTL8366RB_PHY_EXT_CTRL_REG 0x8010
#define RTL8366RB_PHY_EXT_WRDATA_REG 0x8011
#define RTL8366RB_PHY_EXT_RDDATA_REG 0x8012
#define RTL8366RB_PHY_REG_MASK 0x1f
#define RTL8366RB_PHY_PAGE_OFFSET 5
#define RTL8366RB_PHY_PAGE_MASK (0xf << 5)
#define RTL8366RB_PHY_NO_OFFSET 9
#define RTL8366RB_PHY_NO_MASK (0x1f << 9)
#define RTL8366RB_VLAN_INGRESS_CTRL2_REG 0x037f
/* LED control registers */
#define RTL8366RB_LED_BLINKRATE_REG 0x0430
#define RTL8366RB_LED_BLINKRATE_MASK 0x0007
#define RTL8366RB_LED_BLINKRATE_28MS 0x0000
#define RTL8366RB_LED_BLINKRATE_56MS 0x0001
#define RTL8366RB_LED_BLINKRATE_84MS 0x0002
#define RTL8366RB_LED_BLINKRATE_111MS 0x0003
#define RTL8366RB_LED_BLINKRATE_222MS 0x0004
#define RTL8366RB_LED_BLINKRATE_446MS 0x0005
#define RTL8366RB_LED_CTRL_REG 0x0431
#define RTL8366RB_LED_OFF 0x0
#define RTL8366RB_LED_DUP_COL 0x1
#define RTL8366RB_LED_LINK_ACT 0x2
#define RTL8366RB_LED_SPD1000 0x3
#define RTL8366RB_LED_SPD100 0x4
#define RTL8366RB_LED_SPD10 0x5
#define RTL8366RB_LED_SPD1000_ACT 0x6
#define RTL8366RB_LED_SPD100_ACT 0x7
#define RTL8366RB_LED_SPD10_ACT 0x8
#define RTL8366RB_LED_SPD100_10_ACT 0x9
#define RTL8366RB_LED_FIBER 0xa
#define RTL8366RB_LED_AN_FAULT 0xb
#define RTL8366RB_LED_LINK_RX 0xc
#define RTL8366RB_LED_LINK_TX 0xd
#define RTL8366RB_LED_MASTER 0xe
#define RTL8366RB_LED_FORCE 0xf
#define RTL8366RB_LED_0_1_CTRL_REG 0x0432
#define RTL8366RB_LED_1_OFFSET 6
#define RTL8366RB_LED_2_3_CTRL_REG 0x0433
#define RTL8366RB_LED_3_OFFSET 6
#define RTL8366RB_MIB_COUNT 33
#define RTL8366RB_GLOBAL_MIB_COUNT 1
#define RTL8366RB_MIB_COUNTER_PORT_OFFSET 0x0050
#define RTL8366RB_MIB_COUNTER_BASE 0x1000
#define RTL8366RB_MIB_CTRL_REG 0x13F0
#define RTL8366RB_MIB_CTRL_USER_MASK 0x0FFC
#define RTL8366RB_MIB_CTRL_BUSY_MASK BIT(0)
#define RTL8366RB_MIB_CTRL_RESET_MASK BIT(1)
#define RTL8366RB_MIB_CTRL_PORT_RESET(_p) BIT(2 + (_p))
#define RTL8366RB_MIB_CTRL_GLOBAL_RESET BIT(11)
#define RTL8366RB_PORT_VLAN_CTRL_BASE 0x0063
#define RTL8366RB_PORT_VLAN_CTRL_REG(_p) \
(RTL8366RB_PORT_VLAN_CTRL_BASE + (_p) / 4)
#define RTL8366RB_PORT_VLAN_CTRL_MASK 0xf
#define RTL8366RB_PORT_VLAN_CTRL_SHIFT(_p) (4 * ((_p) % 4))
#define RTL8366RB_VLAN_TABLE_READ_BASE 0x018C
#define RTL8366RB_VLAN_TABLE_WRITE_BASE 0x0185
#define RTL8366RB_TABLE_ACCESS_CTRL_REG 0x0180
#define RTL8366RB_TABLE_VLAN_READ_CTRL 0x0E01
#define RTL8366RB_TABLE_VLAN_WRITE_CTRL 0x0F01
#define RTL8366RB_VLAN_MC_BASE(_x) (0x0020 + (_x) * 3)
#define RTL8366RB_PORT_LINK_STATUS_BASE 0x0014
#define RTL8366RB_PORT_STATUS_SPEED_MASK 0x0003
#define RTL8366RB_PORT_STATUS_DUPLEX_MASK 0x0004
#define RTL8366RB_PORT_STATUS_LINK_MASK 0x0010
#define RTL8366RB_PORT_STATUS_TXPAUSE_MASK 0x0020
#define RTL8366RB_PORT_STATUS_RXPAUSE_MASK 0x0040
#define RTL8366RB_PORT_STATUS_AN_MASK 0x0080
#define RTL8366RB_NUM_VLANS 16
#define RTL8366RB_NUM_LEDGROUPS 4
#define RTL8366RB_NUM_VIDS 4096
#define RTL8366RB_PRIORITYMAX 7
#define RTL8366RB_FIDMAX 7
#define RTL8366RB_PORT_1 BIT(0) /* In userspace port 0 */
#define RTL8366RB_PORT_2 BIT(1) /* In userspace port 1 */
#define RTL8366RB_PORT_3 BIT(2) /* In userspace port 2 */
#define RTL8366RB_PORT_4 BIT(3) /* In userspace port 3 */
#define RTL8366RB_PORT_5 BIT(4) /* In userspace port 4 */
#define RTL8366RB_PORT_CPU BIT(5) /* CPU port */
#define RTL8366RB_PORT_ALL (RTL8366RB_PORT_1 | \
RTL8366RB_PORT_2 | \
RTL8366RB_PORT_3 | \
RTL8366RB_PORT_4 | \
RTL8366RB_PORT_5 | \
RTL8366RB_PORT_CPU)
#define RTL8366RB_PORT_ALL_BUT_CPU (RTL8366RB_PORT_1 | \
RTL8366RB_PORT_2 | \
RTL8366RB_PORT_3 | \
RTL8366RB_PORT_4 | \
RTL8366RB_PORT_5)
#define RTL8366RB_PORT_ALL_EXTERNAL (RTL8366RB_PORT_1 | \
RTL8366RB_PORT_2 | \
RTL8366RB_PORT_3 | \
RTL8366RB_PORT_4)
#define RTL8366RB_PORT_ALL_INTERNAL RTL8366RB_PORT_CPU
/* First configuration word per member config, VID and prio */
#define RTL8366RB_VLAN_VID_MASK 0xfff
#define RTL8366RB_VLAN_PRIORITY_SHIFT 12
#define RTL8366RB_VLAN_PRIORITY_MASK 0x7
/* Second configuration word per member config, member and untagged */
#define RTL8366RB_VLAN_UNTAG_SHIFT 8
#define RTL8366RB_VLAN_UNTAG_MASK 0xff
#define RTL8366RB_VLAN_MEMBER_MASK 0xff
/* Third config word per member config, STAG currently unused */
#define RTL8366RB_VLAN_STAG_MBR_MASK 0xff
#define RTL8366RB_VLAN_STAG_MBR_SHIFT 8
#define RTL8366RB_VLAN_STAG_IDX_MASK 0x7
#define RTL8366RB_VLAN_STAG_IDX_SHIFT 5
#define RTL8366RB_VLAN_FID_MASK 0x7
/* Port ingress bandwidth control */
#define RTL8366RB_IB_BASE 0x0200
#define RTL8366RB_IB_REG(pnum) (RTL8366RB_IB_BASE + (pnum))
#define RTL8366RB_IB_BDTH_MASK 0x3fff
#define RTL8366RB_IB_PREIFG BIT(14)
/* Port egress bandwidth control */
#define RTL8366RB_EB_BASE 0x02d1
#define RTL8366RB_EB_REG(pnum) (RTL8366RB_EB_BASE + (pnum))
#define RTL8366RB_EB_BDTH_MASK 0x3fff
#define RTL8366RB_EB_PREIFG_REG 0x02f8
#define RTL8366RB_EB_PREIFG BIT(9)
#define RTL8366RB_BDTH_SW_MAX 1048512 /* 1048576? */
#define RTL8366RB_BDTH_UNIT 64
#define RTL8366RB_BDTH_REG_DEFAULT 16383
/* QOS */
#define RTL8366RB_QOS BIT(15)
/* Include/Exclude Preamble and IFG (20 bytes). 0:Exclude, 1:Include. */
#define RTL8366RB_QOS_DEFAULT_PREIFG 1
/* Interrupt handling */
#define RTL8366RB_INTERRUPT_CONTROL_REG 0x0440
#define RTL8366RB_INTERRUPT_POLARITY BIT(0)
#define RTL8366RB_P4_RGMII_LED BIT(2)
#define RTL8366RB_INTERRUPT_MASK_REG 0x0441
#define RTL8366RB_INTERRUPT_LINK_CHGALL GENMASK(11, 0)
#define RTL8366RB_INTERRUPT_ACLEXCEED BIT(8)
#define RTL8366RB_INTERRUPT_STORMEXCEED BIT(9)
#define RTL8366RB_INTERRUPT_P4_FIBER BIT(12)
#define RTL8366RB_INTERRUPT_P4_UTP BIT(13)
#define RTL8366RB_INTERRUPT_VALID (RTL8366RB_INTERRUPT_LINK_CHGALL | \
RTL8366RB_INTERRUPT_ACLEXCEED | \
RTL8366RB_INTERRUPT_STORMEXCEED | \
RTL8366RB_INTERRUPT_P4_FIBER | \
RTL8366RB_INTERRUPT_P4_UTP)
#define RTL8366RB_INTERRUPT_STATUS_REG 0x0442
#define RTL8366RB_NUM_INTERRUPT 14 /* 0..13 */
/* bits 0..5 enable force when cleared */
#define RTL8366RB_MAC_FORCE_CTRL_REG 0x0F11
#define RTL8366RB_OAM_PARSER_REG 0x0F14
#define RTL8366RB_OAM_MULTIPLEXER_REG 0x0F15
#define RTL8366RB_GREEN_FEATURE_REG 0x0F51
#define RTL8366RB_GREEN_FEATURE_MSK 0x0007
#define RTL8366RB_GREEN_FEATURE_TX BIT(0)
#define RTL8366RB_GREEN_FEATURE_RX BIT(2)
/**
* struct rtl8366rb - RTL8366RB-specific data
* @max_mtu: per-port max MTU setting
*/
struct rtl8366rb {
unsigned int max_mtu[RTL8366RB_NUM_PORTS];
};
static struct rtl8366_mib_counter rtl8366rb_mib_counters[] = {
{ 0, 0, 4, "IfInOctets" },
{ 0, 4, 4, "EtherStatsOctets" },
{ 0, 8, 2, "EtherStatsUnderSizePkts" },
{ 0, 10, 2, "EtherFragments" },
{ 0, 12, 2, "EtherStatsPkts64Octets" },
{ 0, 14, 2, "EtherStatsPkts65to127Octets" },
{ 0, 16, 2, "EtherStatsPkts128to255Octets" },
{ 0, 18, 2, "EtherStatsPkts256to511Octets" },
{ 0, 20, 2, "EtherStatsPkts512to1023Octets" },
{ 0, 22, 2, "EtherStatsPkts1024to1518Octets" },
{ 0, 24, 2, "EtherOversizeStats" },
{ 0, 26, 2, "EtherStatsJabbers" },
{ 0, 28, 2, "IfInUcastPkts" },
{ 0, 30, 2, "EtherStatsMulticastPkts" },
{ 0, 32, 2, "EtherStatsBroadcastPkts" },
{ 0, 34, 2, "EtherStatsDropEvents" },
{ 0, 36, 2, "Dot3StatsFCSErrors" },
{ 0, 38, 2, "Dot3StatsSymbolErrors" },
{ 0, 40, 2, "Dot3InPauseFrames" },
{ 0, 42, 2, "Dot3ControlInUnknownOpcodes" },
{ 0, 44, 4, "IfOutOctets" },
{ 0, 48, 2, "Dot3StatsSingleCollisionFrames" },
{ 0, 50, 2, "Dot3StatMultipleCollisionFrames" },
{ 0, 52, 2, "Dot3sDeferredTransmissions" },
{ 0, 54, 2, "Dot3StatsLateCollisions" },
{ 0, 56, 2, "EtherStatsCollisions" },
{ 0, 58, 2, "Dot3StatsExcessiveCollisions" },
{ 0, 60, 2, "Dot3OutPauseFrames" },
{ 0, 62, 2, "Dot1dBasePortDelayExceededDiscards" },
{ 0, 64, 2, "Dot1dTpPortInDiscards" },
{ 0, 66, 2, "IfOutUcastPkts" },
{ 0, 68, 2, "IfOutMulticastPkts" },
{ 0, 70, 2, "IfOutBroadcastPkts" },
};
static int rtl8366rb_get_mib_counter(struct realtek_smi *smi,
int port,
struct rtl8366_mib_counter *mib,
u64 *mibvalue)
{
u32 addr, val;
int ret;
int i;
addr = RTL8366RB_MIB_COUNTER_BASE +
RTL8366RB_MIB_COUNTER_PORT_OFFSET * (port) +
mib->offset;
/* Writing access counter address first
* then ASIC will prepare 64bits counter wait for being retrived
*/
ret = regmap_write(smi->map, addr, 0); /* Write whatever */
if (ret)
return ret;
/* Read MIB control register */
ret = regmap_read(smi->map, RTL8366RB_MIB_CTRL_REG, &val);
if (ret)
return -EIO;
if (val & RTL8366RB_MIB_CTRL_BUSY_MASK)
return -EBUSY;
if (val & RTL8366RB_MIB_CTRL_RESET_MASK)
return -EIO;
/* Read each individual MIB 16 bits at the time */
*mibvalue = 0;
for (i = mib->length; i > 0; i--) {
ret = regmap_read(smi->map, addr + (i - 1), &val);
if (ret)
return ret;
*mibvalue = (*mibvalue << 16) | (val & 0xFFFF);
}
return 0;
}
static u32 rtl8366rb_get_irqmask(struct irq_data *d)
{
int line = irqd_to_hwirq(d);
u32 val;
/* For line interrupts we combine link down in bits
* 6..11 with link up in bits 0..5 into one interrupt.
*/
if (line < 12)
val = BIT(line) | BIT(line + 6);
else
val = BIT(line);
return val;
}
static void rtl8366rb_mask_irq(struct irq_data *d)
{
struct realtek_smi *smi = irq_data_get_irq_chip_data(d);
int ret;
ret = regmap_update_bits(smi->map, RTL8366RB_INTERRUPT_MASK_REG,
rtl8366rb_get_irqmask(d), 0);
if (ret)
dev_err(smi->dev, "could not mask IRQ\n");
}
static void rtl8366rb_unmask_irq(struct irq_data *d)
{
struct realtek_smi *smi = irq_data_get_irq_chip_data(d);
int ret;
ret = regmap_update_bits(smi->map, RTL8366RB_INTERRUPT_MASK_REG,
rtl8366rb_get_irqmask(d),
rtl8366rb_get_irqmask(d));
if (ret)
dev_err(smi->dev, "could not unmask IRQ\n");
}
static irqreturn_t rtl8366rb_irq(int irq, void *data)
{
struct realtek_smi *smi = data;
u32 stat;
int ret;
/* This clears the IRQ status register */
ret = regmap_read(smi->map, RTL8366RB_INTERRUPT_STATUS_REG,
&stat);
if (ret) {
dev_err(smi->dev, "can't read interrupt status\n");
return IRQ_NONE;
}
stat &= RTL8366RB_INTERRUPT_VALID;
if (!stat)
return IRQ_NONE;
while (stat) {
int line = __ffs(stat);
int child_irq;
stat &= ~BIT(line);
/* For line interrupts we combine link down in bits
* 6..11 with link up in bits 0..5 into one interrupt.
*/
if (line < 12 && line > 5)
line -= 5;
child_irq = irq_find_mapping(smi->irqdomain, line);
handle_nested_irq(child_irq);
}
return IRQ_HANDLED;
}
static struct irq_chip rtl8366rb_irq_chip = {
.name = "RTL8366RB",
.irq_mask = rtl8366rb_mask_irq,
.irq_unmask = rtl8366rb_unmask_irq,
};
static int rtl8366rb_irq_map(struct irq_domain *domain, unsigned int irq,
irq_hw_number_t hwirq)
{
irq_set_chip_data(irq, domain->host_data);
irq_set_chip_and_handler(irq, &rtl8366rb_irq_chip, handle_simple_irq);
irq_set_nested_thread(irq, 1);
irq_set_noprobe(irq);
return 0;
}
static void rtl8366rb_irq_unmap(struct irq_domain *d, unsigned int irq)
{
irq_set_nested_thread(irq, 0);
irq_set_chip_and_handler(irq, NULL, NULL);
irq_set_chip_data(irq, NULL);
}
static const struct irq_domain_ops rtl8366rb_irqdomain_ops = {
.map = rtl8366rb_irq_map,
.unmap = rtl8366rb_irq_unmap,
.xlate = irq_domain_xlate_onecell,
};
static int rtl8366rb_setup_cascaded_irq(struct realtek_smi *smi)
{
struct device_node *intc;
unsigned long irq_trig;
int irq;
int ret;
u32 val;
int i;
intc = of_get_child_by_name(smi->dev->of_node, "interrupt-controller");
if (!intc) {
dev_err(smi->dev, "missing child interrupt-controller node\n");
return -EINVAL;
}
/* RB8366RB IRQs cascade off this one */
irq = of_irq_get(intc, 0);
if (irq <= 0) {
dev_err(smi->dev, "failed to get parent IRQ\n");
ret = irq ? irq : -EINVAL;
goto out_put_node;
}
/* This clears the IRQ status register */
ret = regmap_read(smi->map, RTL8366RB_INTERRUPT_STATUS_REG,
&val);
if (ret) {
dev_err(smi->dev, "can't read interrupt status\n");
goto out_put_node;
}
/* Fetch IRQ edge information from the descriptor */
irq_trig = irqd_get_trigger_type(irq_get_irq_data(irq));
switch (irq_trig) {
case IRQF_TRIGGER_RISING:
case IRQF_TRIGGER_HIGH:
dev_info(smi->dev, "active high/rising IRQ\n");
val = 0;
break;
case IRQF_TRIGGER_FALLING:
case IRQF_TRIGGER_LOW:
dev_info(smi->dev, "active low/falling IRQ\n");
val = RTL8366RB_INTERRUPT_POLARITY;
break;
}
ret = regmap_update_bits(smi->map, RTL8366RB_INTERRUPT_CONTROL_REG,
RTL8366RB_INTERRUPT_POLARITY,
val);
if (ret) {
dev_err(smi->dev, "could not configure IRQ polarity\n");
goto out_put_node;
}
ret = devm_request_threaded_irq(smi->dev, irq, NULL,
rtl8366rb_irq, IRQF_ONESHOT,
"RTL8366RB", smi);
if (ret) {
dev_err(smi->dev, "unable to request irq: %d\n", ret);
goto out_put_node;
}
smi->irqdomain = irq_domain_add_linear(intc,
RTL8366RB_NUM_INTERRUPT,
&rtl8366rb_irqdomain_ops,
smi);
if (!smi->irqdomain) {
dev_err(smi->dev, "failed to create IRQ domain\n");
ret = -EINVAL;
goto out_put_node;
}
for (i = 0; i < smi->num_ports; i++)
irq_set_parent(irq_create_mapping(smi->irqdomain, i), irq);
out_put_node:
of_node_put(intc);
return ret;
}
static int rtl8366rb_set_addr(struct realtek_smi *smi)
{
u8 addr[ETH_ALEN];
u16 val;
int ret;
eth_random_addr(addr);
dev_info(smi->dev, "set MAC: %02X:%02X:%02X:%02X:%02X:%02X\n",
addr[0], addr[1], addr[2], addr[3], addr[4], addr[5]);
val = addr[0] << 8 | addr[1];
ret = regmap_write(smi->map, RTL8366RB_SMAR0, val);
if (ret)
return ret;
val = addr[2] << 8 | addr[3];
ret = regmap_write(smi->map, RTL8366RB_SMAR1, val);
if (ret)
return ret;
val = addr[4] << 8 | addr[5];
ret = regmap_write(smi->map, RTL8366RB_SMAR2, val);
if (ret)
return ret;
return 0;
}
/* Found in a vendor driver */
/* Struct for handling the jam tables' entries */
struct rtl8366rb_jam_tbl_entry {
u16 reg;
u16 val;
};
/* For the "version 0" early silicon, appear in most source releases */
static const struct rtl8366rb_jam_tbl_entry rtl8366rb_init_jam_ver_0[] = {
{0x000B, 0x0001}, {0x03A6, 0x0100}, {0x03A7, 0x0001}, {0x02D1, 0x3FFF},
{0x02D2, 0x3FFF}, {0x02D3, 0x3FFF}, {0x02D4, 0x3FFF}, {0x02D5, 0x3FFF},
{0x02D6, 0x3FFF}, {0x02D7, 0x3FFF}, {0x02D8, 0x3FFF}, {0x022B, 0x0688},
{0x022C, 0x0FAC}, {0x03D0, 0x4688}, {0x03D1, 0x01F5}, {0x0000, 0x0830},
{0x02F9, 0x0200}, {0x02F7, 0x7FFF}, {0x02F8, 0x03FF}, {0x0080, 0x03E8},
{0x0081, 0x00CE}, {0x0082, 0x00DA}, {0x0083, 0x0230}, {0xBE0F, 0x2000},
{0x0231, 0x422A}, {0x0232, 0x422A}, {0x0233, 0x422A}, {0x0234, 0x422A},
{0x0235, 0x422A}, {0x0236, 0x422A}, {0x0237, 0x422A}, {0x0238, 0x422A},
{0x0239, 0x422A}, {0x023A, 0x422A}, {0x023B, 0x422A}, {0x023C, 0x422A},
{0x023D, 0x422A}, {0x023E, 0x422A}, {0x023F, 0x422A}, {0x0240, 0x422A},
{0x0241, 0x422A}, {0x0242, 0x422A}, {0x0243, 0x422A}, {0x0244, 0x422A},
{0x0245, 0x422A}, {0x0246, 0x422A}, {0x0247, 0x422A}, {0x0248, 0x422A},
{0x0249, 0x0146}, {0x024A, 0x0146}, {0x024B, 0x0146}, {0xBE03, 0xC961},
{0x024D, 0x0146}, {0x024E, 0x0146}, {0x024F, 0x0146}, {0x0250, 0x0146},
{0xBE64, 0x0226}, {0x0252, 0x0146}, {0x0253, 0x0146}, {0x024C, 0x0146},
{0x0251, 0x0146}, {0x0254, 0x0146}, {0xBE62, 0x3FD0}, {0x0084, 0x0320},
{0x0255, 0x0146}, {0x0256, 0x0146}, {0x0257, 0x0146}, {0x0258, 0x0146},
{0x0259, 0x0146}, {0x025A, 0x0146}, {0x025B, 0x0146}, {0x025C, 0x0146},
{0x025D, 0x0146}, {0x025E, 0x0146}, {0x025F, 0x0146}, {0x0260, 0x0146},
{0x0261, 0xA23F}, {0x0262, 0x0294}, {0x0263, 0xA23F}, {0x0264, 0x0294},
{0x0265, 0xA23F}, {0x0266, 0x0294}, {0x0267, 0xA23F}, {0x0268, 0x0294},
{0x0269, 0xA23F}, {0x026A, 0x0294}, {0x026B, 0xA23F}, {0x026C, 0x0294},
{0x026D, 0xA23F}, {0x026E, 0x0294}, {0x026F, 0xA23F}, {0x0270, 0x0294},
{0x02F5, 0x0048}, {0xBE09, 0x0E00}, {0xBE1E, 0x0FA0}, {0xBE14, 0x8448},
{0xBE15, 0x1007}, {0xBE4A, 0xA284}, {0xC454, 0x3F0B}, {0xC474, 0x3F0B},
{0xBE48, 0x3672}, {0xBE4B, 0x17A7}, {0xBE4C, 0x0B15}, {0xBE52, 0x0EDD},
{0xBE49, 0x8C00}, {0xBE5B, 0x785C}, {0xBE5C, 0x785C}, {0xBE5D, 0x785C},
{0xBE61, 0x368A}, {0xBE63, 0x9B84}, {0xC456, 0xCC13}, {0xC476, 0xCC13},
{0xBE65, 0x307D}, {0xBE6D, 0x0005}, {0xBE6E, 0xE120}, {0xBE2E, 0x7BAF},
};
/* This v1 init sequence is from Belkin F5D8235 U-Boot release */
static const struct rtl8366rb_jam_tbl_entry rtl8366rb_init_jam_ver_1[] = {
{0x0000, 0x0830}, {0x0001, 0x8000}, {0x0400, 0x8130}, {0xBE78, 0x3C3C},
{0x0431, 0x5432}, {0xBE37, 0x0CE4}, {0x02FA, 0xFFDF}, {0x02FB, 0xFFE0},
{0xC44C, 0x1585}, {0xC44C, 0x1185}, {0xC44C, 0x1585}, {0xC46C, 0x1585},
{0xC46C, 0x1185}, {0xC46C, 0x1585}, {0xC451, 0x2135}, {0xC471, 0x2135},
{0xBE10, 0x8140}, {0xBE15, 0x0007}, {0xBE6E, 0xE120}, {0xBE69, 0xD20F},
{0xBE6B, 0x0320}, {0xBE24, 0xB000}, {0xBE23, 0xFF51}, {0xBE22, 0xDF20},
{0xBE21, 0x0140}, {0xBE20, 0x00BB}, {0xBE24, 0xB800}, {0xBE24, 0x0000},
{0xBE24, 0x7000}, {0xBE23, 0xFF51}, {0xBE22, 0xDF60}, {0xBE21, 0x0140},
{0xBE20, 0x0077}, {0xBE24, 0x7800}, {0xBE24, 0x0000}, {0xBE2E, 0x7B7A},
{0xBE36, 0x0CE4}, {0x02F5, 0x0048}, {0xBE77, 0x2940}, {0x000A, 0x83E0},
{0xBE79, 0x3C3C}, {0xBE00, 0x1340},
};
/* This v2 init sequence is from Belkin F5D8235 U-Boot release */
static const struct rtl8366rb_jam_tbl_entry rtl8366rb_init_jam_ver_2[] = {
{0x0450, 0x0000}, {0x0400, 0x8130}, {0x000A, 0x83ED}, {0x0431, 0x5432},
{0xC44F, 0x6250}, {0xC46F, 0x6250}, {0xC456, 0x0C14}, {0xC476, 0x0C14},
{0xC44C, 0x1C85}, {0xC44C, 0x1885}, {0xC44C, 0x1C85}, {0xC46C, 0x1C85},
{0xC46C, 0x1885}, {0xC46C, 0x1C85}, {0xC44C, 0x0885}, {0xC44C, 0x0881},
{0xC44C, 0x0885}, {0xC46C, 0x0885}, {0xC46C, 0x0881}, {0xC46C, 0x0885},
{0xBE2E, 0x7BA7}, {0xBE36, 0x1000}, {0xBE37, 0x1000}, {0x8000, 0x0001},
{0xBE69, 0xD50F}, {0x8000, 0x0000}, {0xBE69, 0xD50F}, {0xBE6E, 0x0320},
{0xBE77, 0x2940}, {0xBE78, 0x3C3C}, {0xBE79, 0x3C3C}, {0xBE6E, 0xE120},
{0x8000, 0x0001}, {0xBE15, 0x1007}, {0x8000, 0x0000}, {0xBE15, 0x1007},
{0xBE14, 0x0448}, {0xBE1E, 0x00A0}, {0xBE10, 0x8160}, {0xBE10, 0x8140},
{0xBE00, 0x1340}, {0x0F51, 0x0010},
};
/* Appears in a DDWRT code dump */
static const struct rtl8366rb_jam_tbl_entry rtl8366rb_init_jam_ver_3[] = {
{0x0000, 0x0830}, {0x0400, 0x8130}, {0x000A, 0x83ED}, {0x0431, 0x5432},
{0x0F51, 0x0017}, {0x02F5, 0x0048}, {0x02FA, 0xFFDF}, {0x02FB, 0xFFE0},
{0xC456, 0x0C14}, {0xC476, 0x0C14}, {0xC454, 0x3F8B}, {0xC474, 0x3F8B},
{0xC450, 0x2071}, {0xC470, 0x2071}, {0xC451, 0x226B}, {0xC471, 0x226B},
{0xC452, 0xA293}, {0xC472, 0xA293}, {0xC44C, 0x1585}, {0xC44C, 0x1185},
{0xC44C, 0x1585}, {0xC46C, 0x1585}, {0xC46C, 0x1185}, {0xC46C, 0x1585},
{0xC44C, 0x0185}, {0xC44C, 0x0181}, {0xC44C, 0x0185}, {0xC46C, 0x0185},
{0xC46C, 0x0181}, {0xC46C, 0x0185}, {0xBE24, 0xB000}, {0xBE23, 0xFF51},
{0xBE22, 0xDF20}, {0xBE21, 0x0140}, {0xBE20, 0x00BB}, {0xBE24, 0xB800},
{0xBE24, 0x0000}, {0xBE24, 0x7000}, {0xBE23, 0xFF51}, {0xBE22, 0xDF60},
{0xBE21, 0x0140}, {0xBE20, 0x0077}, {0xBE24, 0x7800}, {0xBE24, 0x0000},
{0xBE2E, 0x7BA7}, {0xBE36, 0x1000}, {0xBE37, 0x1000}, {0x8000, 0x0001},
{0xBE69, 0xD50F}, {0x8000, 0x0000}, {0xBE69, 0xD50F}, {0xBE6B, 0x0320},
{0xBE77, 0x2800}, {0xBE78, 0x3C3C}, {0xBE79, 0x3C3C}, {0xBE6E, 0xE120},
{0x8000, 0x0001}, {0xBE10, 0x8140}, {0x8000, 0x0000}, {0xBE10, 0x8140},
{0xBE15, 0x1007}, {0xBE14, 0x0448}, {0xBE1E, 0x00A0}, {0xBE10, 0x8160},
{0xBE10, 0x8140}, {0xBE00, 0x1340}, {0x0450, 0x0000}, {0x0401, 0x0000},
};
/* Belkin F5D8235 v1, "belkin,f5d8235-v1" */
static const struct rtl8366rb_jam_tbl_entry rtl8366rb_init_jam_f5d8235[] = {
{0x0242, 0x02BF}, {0x0245, 0x02BF}, {0x0248, 0x02BF}, {0x024B, 0x02BF},
{0x024E, 0x02BF}, {0x0251, 0x02BF}, {0x0254, 0x0A3F}, {0x0256, 0x0A3F},
{0x0258, 0x0A3F}, {0x025A, 0x0A3F}, {0x025C, 0x0A3F}, {0x025E, 0x0A3F},
{0x0263, 0x007C}, {0x0100, 0x0004}, {0xBE5B, 0x3500}, {0x800E, 0x200F},
{0xBE1D, 0x0F00}, {0x8001, 0x5011}, {0x800A, 0xA2F4}, {0x800B, 0x17A3},
{0xBE4B, 0x17A3}, {0xBE41, 0x5011}, {0xBE17, 0x2100}, {0x8000, 0x8304},
{0xBE40, 0x8304}, {0xBE4A, 0xA2F4}, {0x800C, 0xA8D5}, {0x8014, 0x5500},
{0x8015, 0x0004}, {0xBE4C, 0xA8D5}, {0xBE59, 0x0008}, {0xBE09, 0x0E00},
{0xBE36, 0x1036}, {0xBE37, 0x1036}, {0x800D, 0x00FF}, {0xBE4D, 0x00FF},
};
/* DGN3500, "netgear,dgn3500", "netgear,dgn3500b" */
static const struct rtl8366rb_jam_tbl_entry rtl8366rb_init_jam_dgn3500[] = {
{0x0000, 0x0830}, {0x0400, 0x8130}, {0x000A, 0x83ED}, {0x0F51, 0x0017},
{0x02F5, 0x0048}, {0x02FA, 0xFFDF}, {0x02FB, 0xFFE0}, {0x0450, 0x0000},
{0x0401, 0x0000}, {0x0431, 0x0960},
};
/* This jam table activates "green ethernet", which means low power mode
* and is claimed to detect the cable length and not use more power than
* necessary, and the ports should enter power saving mode 10 seconds after
* a cable is disconnected. Seems to always be the same.
*/
static const struct rtl8366rb_jam_tbl_entry rtl8366rb_green_jam[] = {
{0xBE78, 0x323C}, {0xBE77, 0x5000}, {0xBE2E, 0x7BA7},
{0xBE59, 0x3459}, {0xBE5A, 0x745A}, {0xBE5B, 0x785C},
{0xBE5C, 0x785C}, {0xBE6E, 0xE120}, {0xBE79, 0x323C},
};
/* Function that jams the tables in the proper registers */
static int rtl8366rb_jam_table(const struct rtl8366rb_jam_tbl_entry *jam_table,
int jam_size, struct realtek_smi *smi,
bool write_dbg)
{
u32 val;
int ret;
int i;
for (i = 0; i < jam_size; i++) {
if ((jam_table[i].reg & 0xBE00) == 0xBE00) {
ret = regmap_read(smi->map,
RTL8366RB_PHY_ACCESS_BUSY_REG,
&val);
if (ret)
return ret;
if (!(val & RTL8366RB_PHY_INT_BUSY)) {
ret = regmap_write(smi->map,
RTL8366RB_PHY_ACCESS_CTRL_REG,
RTL8366RB_PHY_CTRL_WRITE);
if (ret)
return ret;
}
}
if (write_dbg)
dev_dbg(smi->dev, "jam %04x into register %04x\n",
jam_table[i].val,
jam_table[i].reg);
ret = regmap_write(smi->map,
jam_table[i].reg,
jam_table[i].val);
if (ret)
return ret;
}
return 0;
}
static int rtl8366rb_setup(struct dsa_switch *ds)
{
struct realtek_smi *smi = ds->priv;
const struct rtl8366rb_jam_tbl_entry *jam_table;
struct rtl8366rb *rb;
u32 chip_ver = 0;
u32 chip_id = 0;
int jam_size;
u32 val;
int ret;
int i;
rb = smi->chip_data;
ret = regmap_read(smi->map, RTL8366RB_CHIP_ID_REG, &chip_id);
if (ret) {
dev_err(smi->dev, "unable to read chip id\n");
return ret;
}
switch (chip_id) {
case RTL8366RB_CHIP_ID_8366:
break;
default:
dev_err(smi->dev, "unknown chip id (%04x)\n", chip_id);
return -ENODEV;
}
ret = regmap_read(smi->map, RTL8366RB_CHIP_VERSION_CTRL_REG,
&chip_ver);
if (ret) {
dev_err(smi->dev, "unable to read chip version\n");
return ret;
}
dev_info(smi->dev, "RTL%04x ver %u chip found\n",
chip_id, chip_ver & RTL8366RB_CHIP_VERSION_MASK);
/* Do the init dance using the right jam table */
switch (chip_ver) {
case 0:
jam_table = rtl8366rb_init_jam_ver_0;
jam_size = ARRAY_SIZE(rtl8366rb_init_jam_ver_0);
break;
case 1:
jam_table = rtl8366rb_init_jam_ver_1;
jam_size = ARRAY_SIZE(rtl8366rb_init_jam_ver_1);
break;
case 2:
jam_table = rtl8366rb_init_jam_ver_2;
jam_size = ARRAY_SIZE(rtl8366rb_init_jam_ver_2);
break;
default:
jam_table = rtl8366rb_init_jam_ver_3;
jam_size = ARRAY_SIZE(rtl8366rb_init_jam_ver_3);
break;
}
/* Special jam tables for special routers
* TODO: are these necessary? Maintainers, please test
* without them, using just the off-the-shelf tables.
*/
if (of_machine_is_compatible("belkin,f5d8235-v1")) {
jam_table = rtl8366rb_init_jam_f5d8235;
jam_size = ARRAY_SIZE(rtl8366rb_init_jam_f5d8235);
}
if (of_machine_is_compatible("netgear,dgn3500") ||
of_machine_is_compatible("netgear,dgn3500b")) {
jam_table = rtl8366rb_init_jam_dgn3500;
jam_size = ARRAY_SIZE(rtl8366rb_init_jam_dgn3500);
}
ret = rtl8366rb_jam_table(jam_table, jam_size, smi, true);
if (ret)
return ret;
/* Set up the "green ethernet" feature */
ret = rtl8366rb_jam_table(rtl8366rb_green_jam,
ARRAY_SIZE(rtl8366rb_green_jam), smi, false);
if (ret)
return ret;
ret = regmap_write(smi->map,
RTL8366RB_GREEN_FEATURE_REG,
(chip_ver == 1) ? 0x0007 : 0x0003);
if (ret)
return ret;
/* Vendor driver sets 0x240 in registers 0xc and 0xd (undocumented) */
ret = regmap_write(smi->map, 0x0c, 0x240);
if (ret)
return ret;
ret = regmap_write(smi->map, 0x0d, 0x240);
if (ret)
return ret;
/* Set some random MAC address */
ret = rtl8366rb_set_addr(smi);
if (ret)
return ret;
/* Enable CPU port with custom DSA tag 8899.
*
* If you set RTL8368RB_CPU_NO_TAG (bit 15) in this registers
* the custom tag is turned off.
*/
ret = regmap_update_bits(smi->map, RTL8368RB_CPU_CTRL_REG,
0xFFFF,
BIT(smi->cpu_port));
if (ret)
return ret;
/* Make sure we default-enable the fixed CPU port */
ret = regmap_update_bits(smi->map, RTL8366RB_PECR,
BIT(smi->cpu_port),
0);
if (ret)
return ret;
/* Set maximum packet length to 1536 bytes */
ret = regmap_update_bits(smi->map, RTL8366RB_SGCR,
RTL8366RB_SGCR_MAX_LENGTH_MASK,
RTL8366RB_SGCR_MAX_LENGTH_1536);
if (ret)
return ret;
for (i = 0; i < RTL8366RB_NUM_PORTS; i++)
/* layer 2 size, see rtl8366rb_change_mtu() */
rb->max_mtu[i] = 1532;
/* Enable learning for all ports */
ret = regmap_write(smi->map, RTL8366RB_SSCR0, 0);
if (ret)
return ret;
/* Enable auto ageing for all ports */
ret = regmap_write(smi->map, RTL8366RB_SSCR1, 0);
if (ret)
return ret;
/* Port 4 setup: this enables Port 4, usually the WAN port,
* common PHY IO mode is apparently mode 0, and this is not what
* the port is initialized to. There is no explanation of the
* IO modes in the Realtek source code, if your WAN port is
* connected to something exotic such as fiber, then this might
* be worth experimenting with.
*/
ret = regmap_update_bits(smi->map, RTL8366RB_PMC0,
RTL8366RB_PMC0_P4_IOMODE_MASK,
0 << RTL8366RB_PMC0_P4_IOMODE_SHIFT);
if (ret)
return ret;
/* Discard VLAN tagged packets if the port is not a member of
* the VLAN with which the packets is associated.
*/
ret = regmap_write(smi->map, RTL8366RB_VLAN_INGRESS_CTRL2_REG,
RTL8366RB_PORT_ALL);
if (ret)
return ret;
/* Don't drop packets whose DA has not been learned */
ret = regmap_update_bits(smi->map, RTL8366RB_SSCR2,
RTL8366RB_SSCR2_DROP_UNKNOWN_DA, 0);
if (ret)
return ret;
/* Set blinking, TODO: make this configurable */
ret = regmap_update_bits(smi->map, RTL8366RB_LED_BLINKRATE_REG,
RTL8366RB_LED_BLINKRATE_MASK,
RTL8366RB_LED_BLINKRATE_56MS);
if (ret)
return ret;
/* Set up LED activity:
* Each port has 4 LEDs, we configure all ports to the same
* behaviour (no individual config) but we can set up each
* LED separately.
*/
if (smi->leds_disabled) {
/* Turn everything off */
regmap_update_bits(smi->map,
RTL8366RB_LED_0_1_CTRL_REG,
0x0FFF, 0);
regmap_update_bits(smi->map,
RTL8366RB_LED_2_3_CTRL_REG,
0x0FFF, 0);
regmap_update_bits(smi->map,
RTL8366RB_INTERRUPT_CONTROL_REG,
RTL8366RB_P4_RGMII_LED,
0);
val = RTL8366RB_LED_OFF;
} else {
/* TODO: make this configurable per LED */
val = RTL8366RB_LED_FORCE;
}
for (i = 0; i < 4; i++) {
ret = regmap_update_bits(smi->map,
RTL8366RB_LED_CTRL_REG,
0xf << (i * 4),
val << (i * 4));
if (ret)
return ret;
}
ret = rtl8366_init_vlan(smi);
if (ret)
return ret;
ret = rtl8366rb_setup_cascaded_irq(smi);
if (ret)
dev_info(smi->dev, "no interrupt support\n");
ret = realtek_smi_setup_mdio(smi);
if (ret) {
dev_info(smi->dev, "could not set up MDIO bus\n");
return -ENODEV;
}
ds->configure_vlan_while_not_filtering = false;
return 0;
}
static enum dsa_tag_protocol rtl8366_get_tag_protocol(struct dsa_switch *ds,
int port,
enum dsa_tag_protocol mp)
{
/* This switch uses the 4 byte protocol A Realtek DSA tag */
return DSA_TAG_PROTO_RTL4_A;
}
static void
rtl8366rb_mac_link_up(struct dsa_switch *ds, int port, unsigned int mode,
phy_interface_t interface, struct phy_device *phydev,
int speed, int duplex, bool tx_pause, bool rx_pause)
{
struct realtek_smi *smi = ds->priv;
int ret;