diff options
Diffstat (limited to 'drivers/net/dsa/rtl8366rb.c')
| -rw-r--r-- | drivers/net/dsa/rtl8366rb.c | 1540 |
1 files changed, 1540 insertions, 0 deletions
diff --git a/drivers/net/dsa/rtl8366rb.c b/drivers/net/dsa/rtl8366rb.c new file mode 100644 index 000000000..12d7e5cd3 --- /dev/null +++ b/drivers/net/dsa/rtl8366rb.c @@ -0,0 +1,1540 @@ +// 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 */ + +/* For the "version 0" early silicon, appear in most source releases */ +static const u16 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 u16 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 u16 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 u16 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 u16 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 u16 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 u16 rtl8366rb_green_jam[][2] = { + {0xBE78, 0x323C}, {0xBE77, 0x5000}, {0xBE2E, 0x7BA7}, + {0xBE59, 0x3459}, {0xBE5A, 0x745A}, {0xBE5B, 0x785C}, + {0xBE5C, 0x785C}, {0xBE6E, 0xE120}, {0xBE79, 0x323C}, +}; + +static int rtl8366rb_setup(struct dsa_switch *ds) +{ + struct realtek_smi *smi = ds->priv; + const u16 *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); + } + + i = 0; + while (i < jam_size) { + if ((jam_table[i] & 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; + } + } + dev_dbg(smi->dev, "jam %04x into register %04x\n", + jam_table[i + 1], + jam_table[i]); + ret = regmap_write(smi->map, + jam_table[i], + jam_table[i + 1]); + if (ret) + return ret; + i += 2; + } + + /* Set up the "green ethernet" feature */ + i = 0; + while (i < ARRAY_SIZE(rtl8366rb_green_jam)) { + 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; + ret = regmap_write(smi->map, + rtl8366rb_green_jam[i][0], + rtl8366rb_green_jam[i][1]); + if (ret) + return ret; + i++; + } + } + 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; + } + + 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; + + if (port != smi->cpu_port) + return; + + dev_dbg(smi->dev, "MAC link up on CPU port (%d)\n", port); + + /* Force the fixed CPU port into 1Gbit mode, no autonegotiation */ + ret = regmap_update_bits(smi->map, RTL8366RB_MAC_FORCE_CTRL_REG, + BIT(port), BIT(port)); + if (ret) { + dev_err(smi->dev, "failed to force 1Gbit on CPU port\n"); + return; + } + + ret = regmap_update_bits(smi->map, RTL8366RB_PAACR2, + 0xFF00U, + RTL8366RB_PAACR_CPU_PORT << 8); + if (ret) { + dev_err(smi->dev, "failed to set PAACR on CPU port\n"); + return; + } + + /* Enable the CPU port */ + ret = regmap_update_bits(smi->map, RTL8366RB_PECR, BIT(port), + 0); + if (ret) { + dev_err(smi->dev, "failed to enable the CPU port\n"); + return; + } +} + +static void +rtl8366rb_mac_link_down(struct dsa_switch *ds, int port, unsigned int mode, + phy_interface_t interface) +{ + struct realtek_smi *smi = ds->priv; + int ret; + + if (port != smi->cpu_port) + return; + + dev_dbg(smi->dev, "MAC link down on CPU port (%d)\n", port); + + /* Disable the CPU port */ + ret = regmap_update_bits(smi->map, RTL8366RB_PECR, BIT(port), + BIT(port)); + if (ret) { + dev_err(smi->dev, "failed to disable the CPU port\n"); + return; + } +} + +static void rb8366rb_set_port_led(struct realtek_smi *smi, + int port, bool enable) +{ + u16 val = enable ? 0x3f : 0; + int ret; + + if (smi->leds_disabled) + return; + + switch (port) { + case 0: + ret = regmap_update_bits(smi->map, + RTL8366RB_LED_0_1_CTRL_REG, + 0x3F, val); + break; + case 1: + ret = regmap_update_bits(smi->map, + RTL8366RB_LED_0_1_CTRL_REG, + 0x3F << RTL8366RB_LED_1_OFFSET, + val << RTL8366RB_LED_1_OFFSET); + break; + case 2: + ret = regmap_update_bits(smi->map, + RTL8366RB_LED_2_3_CTRL_REG, + 0x3F, val); + break; + case 3: + ret = regmap_update_bits(smi->map, + RTL8366RB_LED_2_3_CTRL_REG, + 0x3F << RTL8366RB_LED_3_OFFSET, + val << RTL8366RB_LED_3_OFFSET); + break; + case 4: + ret = regmap_update_bits(smi->map, + RTL8366RB_INTERRUPT_CONTROL_REG, + RTL8366RB_P4_RGMII_LED, + enable ? RTL8366RB_P4_RGMII_LED : 0); + break; + default: + dev_err(smi->dev, "no LED for port %d\n", port); + return; + } + if (ret) + dev_err(smi->dev, "error updating LED on port %d\n", port); +} + +static int +rtl8366rb_port_enable(struct dsa_switch *ds, int port, + struct phy_device *phy) +{ + struct realtek_smi *smi = ds->priv; + int ret; + + dev_dbg(smi->dev, "enable port %d\n", port); + ret = regmap_update_bits(smi->map, RTL8366RB_PECR, BIT(port), + 0); + if (ret) + return ret; + + rb8366rb_set_port_led(smi, port, true); + return 0; +} + +static void +rtl8366rb_port_disable(struct dsa_switch *ds, int port) +{ + struct realtek_smi *smi = ds->priv; + int ret; + + dev_dbg(smi->dev, "disable port %d\n", port); + ret = regmap_update_bits(smi->map, RTL8366RB_PECR, BIT(port), + BIT(port)); + if (ret) + return; + + rb8366rb_set_port_led(smi, port, false); +} + +static int rtl8366rb_change_mtu(struct dsa_switch *ds, int port, int new_mtu) +{ + struct realtek_smi *smi = ds->priv; + struct rtl8366rb *rb; + unsigned int max_mtu; + u32 len; + int i; + + /* Cache the per-port MTU setting */ + rb = smi->chip_data; + rb->max_mtu[port] = new_mtu; + + /* Roof out the MTU for the entire switch to the greatest + * common denominator: the biggest set for any one port will + * be the biggest MTU for the switch. + * + * The first setting, 1522 bytes, is max IP packet 1500 bytes, + * plus ethernet header, 1518 bytes, plus CPU tag, 4 bytes. + * This function should consider the parameter an SDU, so the + * MTU passed for this setting is 1518 bytes. The same logic + * of subtracting the DSA tag of 4 bytes apply to the other + * settings. + */ + max_mtu = 1518; + for (i = 0; i < RTL8366RB_NUM_PORTS; i++) { + if (rb->max_mtu[i] > max_mtu) + max_mtu = rb->max_mtu[i]; + } + if (max_mtu <= 1518) + len = RTL8366RB_SGCR_MAX_LENGTH_1522; + else if (max_mtu > 1518 && max_mtu <= 1532) + len = RTL8366RB_SGCR_MAX_LENGTH_1536; + else if (max_mtu > 1532 && max_mtu <= 1548) + len = RTL8366RB_SGCR_MAX_LENGTH_1552; + else + len = RTL8366RB_SGCR_MAX_LENGTH_16000; + + return regmap_update_bits(smi->map, RTL8366RB_SGCR, + RTL8366RB_SGCR_MAX_LENGTH_MASK, + len); +} + +static int rtl8366rb_max_mtu(struct dsa_switch *ds, int port) +{ + /* The max MTU is 16000 bytes, so we subtract the CPU tag + * and the max presented to the system is 15996 bytes. + */ + return 15996; +} + +static int rtl8366rb_get_vlan_4k(struct realtek_smi *smi, u32 vid, + struct rtl8366_vlan_4k *vlan4k) +{ + u32 data[3]; + int ret; + int i; + + memset(vlan4k, '\0', sizeof(struct rtl8366_vlan_4k)); + + if (vid >= RTL8366RB_NUM_VIDS) + return -EINVAL; + + /* write VID */ + ret = regmap_write(smi->map, RTL8366RB_VLAN_TABLE_WRITE_BASE, + vid & RTL8366RB_VLAN_VID_MASK); + if (ret) + return ret; + + /* write table access control word */ + ret = regmap_write(smi->map, RTL8366RB_TABLE_ACCESS_CTRL_REG, + RTL8366RB_TABLE_VLAN_READ_CTRL); + if (ret) + return ret; + + for (i = 0; i < 3; i++) { + ret = regmap_read(smi->map, + RTL8366RB_VLAN_TABLE_READ_BASE + i, + &data[i]); + if (ret) + return ret; + } + + vlan4k->vid = vid; + vlan4k->untag = (data[1] >> RTL8366RB_VLAN_UNTAG_SHIFT) & + RTL8366RB_VLAN_UNTAG_MASK; + vlan4k->member = data[1] & RTL8366RB_VLAN_MEMBER_MASK; + vlan4k->fid = data[2] & RTL8366RB_VLAN_FID_MASK; + + return 0; +} + +static int rtl8366rb_set_vlan_4k(struct realtek_smi *smi, + const struct rtl8366_vlan_4k *vlan4k) +{ + u32 data[3]; + int ret; + int i; + + if (vlan4k->vid >= RTL8366RB_NUM_VIDS || + vlan4k->member > RTL8366RB_VLAN_MEMBER_MASK || + vlan4k->untag > RTL8366RB_VLAN_UNTAG_MASK || + vlan4k->fid > RTL8366RB_FIDMAX) + return -EINVAL; + + data[0] = vlan4k->vid & RTL8366RB_VLAN_VID_MASK; + data[1] = (vlan4k->member & RTL8366RB_VLAN_MEMBER_MASK) | + ((vlan4k->untag & RTL8366RB_VLAN_UNTAG_MASK) << + RTL8366RB_VLAN_UNTAG_SHIFT); + data[2] = vlan4k->fid & RTL8366RB_VLAN_FID_MASK; + + for (i = 0; i < 3; i++) { + ret = regmap_write(smi->map, + RTL8366RB_VLAN_TABLE_WRITE_BASE + i, + data[i]); + if (ret) + return ret; + } + + /* write table access control word */ + ret = regmap_write(smi->map, RTL8366RB_TABLE_ACCESS_CTRL_REG, + RTL8366RB_TABLE_VLAN_WRITE_CTRL); + + return ret; +} + +static int rtl8366rb_get_vlan_mc(struct realtek_smi *smi, u32 index, + struct rtl8366_vlan_mc *vlanmc) +{ + u32 data[3]; + int ret; + int i; + + memset(vlanmc, '\0', sizeof(struct rtl8366_vlan_mc)); + + if (index >= RTL8366RB_NUM_VLANS) + return -EINVAL; + + for (i = 0; i < 3; i++) { + ret = regmap_read(smi->map, + RTL8366RB_VLAN_MC_BASE(index) + i, + &data[i]); + if (ret) + return ret; + } + + vlanmc->vid = data[0] & RTL8366RB_VLAN_VID_MASK; + vlanmc->priority = (data[0] >> RTL8366RB_VLAN_PRIORITY_SHIFT) & + RTL8366RB_VLAN_PRIORITY_MASK; + vlanmc->untag = (data[1] >> RTL8366RB_VLAN_UNTAG_SHIFT) & + RTL8366RB_VLAN_UNTAG_MASK; + vlanmc->member = data[1] & RTL8366RB_VLAN_MEMBER_MASK; + vlanmc->fid = data[2] & RTL8366RB_VLAN_FID_MASK; + + return 0; +} + +static int rtl8366rb_set_vlan_mc(struct realtek_smi *smi, u32 index, + const struct rtl8366_vlan_mc *vlanmc) +{ + u32 data[3]; + int ret; + int i; + + if (index >= RTL8366RB_NUM_VLANS || + vlanmc->vid >= RTL8366RB_NUM_VIDS || + vlanmc->priority > RTL8366RB_PRIORITYMAX || + vlanmc->member > RTL8366RB_VLAN_MEMBER_MASK || + vlanmc->untag > RTL8366RB_VLAN_UNTAG_MASK || + vlanmc->fid > RTL8366RB_FIDMAX) + return -EINVAL; + + data[0] = (vlanmc->vid & RTL8366RB_VLAN_VID_MASK) | + ((vlanmc->priority & RTL8366RB_VLAN_PRIORITY_MASK) << + RTL8366RB_VLAN_PRIORITY_SHIFT); + data[1] = (vlanmc->member & RTL8366RB_VLAN_MEMBER_MASK) | + ((vlanmc->untag & RTL8366RB_VLAN_UNTAG_MASK) << + RTL8366RB_VLAN_UNTAG_SHIFT); + data[2] = vlanmc->fid & RTL8366RB_VLAN_FID_MASK; + + for (i = 0; i < 3; i++) { + ret = regmap_write(smi->map, + RTL8366RB_VLAN_MC_BASE(index) + i, + data[i]); + if (ret) + return ret; + } + + return 0; +} + +static int rtl8366rb_get_mc_index(struct realtek_smi *smi, int port, int *val) +{ + u32 data; + int ret; + + if (port >= smi->num_ports) + return -EINVAL; + + ret = regmap_read(smi->map, RTL8366RB_PORT_VLAN_CTRL_REG(port), + &data); + if (ret) + return ret; + + *val = (data >> RTL8366RB_PORT_VLAN_CTRL_SHIFT(port)) & + RTL8366RB_PORT_VLAN_CTRL_MASK; + + return 0; +} + +static int rtl8366rb_set_mc_index(struct realtek_smi *smi, int port, int index) +{ + if (port >= smi->num_ports || index >= RTL8366RB_NUM_VLANS) + return -EINVAL; + + return regmap_update_bits(smi->map, RTL8366RB_PORT_VLAN_CTRL_REG(port), + RTL8366RB_PORT_VLAN_CTRL_MASK << + RTL8366RB_PORT_VLAN_CTRL_SHIFT(port), + (index & RTL8366RB_PORT_VLAN_CTRL_MASK) << + RTL8366RB_PORT_VLAN_CTRL_SHIFT(port)); +} + +static bool rtl8366rb_is_vlan_valid(struct realtek_smi *smi, unsigned int vlan) +{ + unsigned int max = RTL8366RB_NUM_VLANS - 1; + + if (smi->vlan4k_enabled) + max = RTL8366RB_NUM_VIDS - 1; + + if (vlan == 0 || vlan > max) + return false; + + return true; +} + +static int rtl8366rb_enable_vlan(struct realtek_smi *smi, bool enable) +{ + dev_dbg(smi->dev, "%s VLAN\n", enable ? "enable" : "disable"); + return regmap_update_bits(smi->map, + RTL8366RB_SGCR, RTL8366RB_SGCR_EN_VLAN, + enable ? RTL8366RB_SGCR_EN_VLAN : 0); +} + +static int rtl8366rb_enable_vlan4k(struct realtek_smi *smi, bool enable) +{ + dev_dbg(smi->dev, "%s VLAN 4k\n", enable ? "enable" : "disable"); + return regmap_update_bits(smi->map, RTL8366RB_SGCR, + RTL8366RB_SGCR_EN_VLAN_4KTB, + enable ? RTL8366RB_SGCR_EN_VLAN_4KTB : 0); +} + +static int rtl8366rb_phy_read(struct realtek_smi *smi, int phy, int regnum) +{ + u32 val; + u32 reg; + int ret; + + if (phy > RTL8366RB_PHY_NO_MAX) + return -EINVAL; + + ret = regmap_write(smi->map, RTL8366RB_PHY_ACCESS_CTRL_REG, + RTL8366RB_PHY_CTRL_READ); + if (ret) + return ret; + + reg = 0x8000 | (1 << (phy + RTL8366RB_PHY_NO_OFFSET)) | regnum; + + ret = regmap_write(smi->map, reg, 0); + if (ret) { + dev_err(smi->dev, + "failed to write PHY%d reg %04x @ %04x, ret %d\n", + phy, regnum, reg, ret); + return ret; + } + + ret = regmap_read(smi->map, RTL8366RB_PHY_ACCESS_DATA_REG, &val); + if (ret) + return ret; + + dev_dbg(smi->dev, "read PHY%d register 0x%04x @ %08x, val <- %04x\n", + phy, regnum, reg, val); + + return val; +} + +static int rtl8366rb_phy_write(struct realtek_smi *smi, int phy, int regnum, + u16 val) +{ + u32 reg; + int ret; + + if (phy > RTL8366RB_PHY_NO_MAX) + return -EINVAL; + + ret = regmap_write(smi->map, RTL8366RB_PHY_ACCESS_CTRL_REG, + RTL8366RB_PHY_CTRL_WRITE); + if (ret) + return ret; + + reg = 0x8000 | (1 << (phy + RTL8366RB_PHY_NO_OFFSET)) | regnum; + + dev_dbg(smi->dev, "write PHY%d register 0x%04x @ %04x, val -> %04x\n", + phy, regnum, reg, val); + + ret = regmap_write(smi->map, reg, val); + if (ret) + return ret; + + return 0; +} + +static int rtl8366rb_reset_chip(struct realtek_smi *smi) +{ + int timeout = 10; + u32 val; + int ret; + + realtek_smi_write_reg_noack(smi, RTL8366RB_RESET_CTRL_REG, + RTL8366RB_CHIP_CTRL_RESET_HW); + do { + usleep_range(20000, 25000); + ret = regmap_read(smi->map, RTL8366RB_RESET_CTRL_REG, &val); + if (ret) + return ret; + + if (!(val & RTL8366RB_CHIP_CTRL_RESET_HW)) + break; + } while (--timeout); + + if (!timeout) { + dev_err(smi->dev, "timeout waiting for the switch to reset\n"); + return -EIO; + } + + return 0; +} + +static int rtl8366rb_detect(struct realtek_smi *smi) +{ + struct device *dev = smi->dev; + int ret; + u32 val; + + /* Detect device */ + ret = regmap_read(smi->map, 0x5c, &val); + if (ret) { + dev_err(dev, "can't get chip ID (%d)\n", ret); + return ret; + } + + switch (val) { + case 0x6027: + dev_info(dev, "found an RTL8366S switch\n"); + dev_err(dev, "this switch is not yet supported, submit patches!\n"); + return -ENODEV; + case 0x5937: + dev_info(dev, "found an RTL8366RB switch\n"); + smi->cpu_port = RTL8366RB_PORT_NUM_CPU; + smi->num_ports = RTL8366RB_NUM_PORTS; + smi->num_vlan_mc = RTL8366RB_NUM_VLANS; + smi->mib_counters = rtl8366rb_mib_counters; + smi->num_mib_counters = ARRAY_SIZE(rtl8366rb_mib_counters); + break; + default: + dev_info(dev, "found an Unknown Realtek switch (id=0x%04x)\n", + val); + break; + } + + ret = rtl8366rb_reset_chip(smi); + if (ret) + return ret; + + return 0; +} + +static const struct dsa_switch_ops rtl8366rb_switch_ops = { + .get_tag_protocol = rtl8366_get_tag_protocol, + .setup = rtl8366rb_setup, + .phylink_mac_link_up = rtl8366rb_mac_link_up, + .phylink_mac_link_down = rtl8366rb_mac_link_down, + .get_strings = rtl8366_get_strings, + .get_ethtool_stats = rtl8366_get_ethtool_stats, + .get_sset_count = rtl8366_get_sset_count, + .port_vlan_filtering = rtl8366_vlan_filtering, + .port_vlan_prepare = rtl8366_vlan_prepare, + .port_vlan_add = rtl8366_vlan_add, + .port_vlan_del = rtl8366_vlan_del, + .port_enable = rtl8366rb_port_enable, + .port_disable = rtl8366rb_port_disable, + .port_change_mtu = rtl8366rb_change_mtu, + .port_max_mtu = rtl8366rb_max_mtu, +}; + +static const struct realtek_smi_ops rtl8366rb_smi_ops = { + .detect = rtl8366rb_detect, + .get_vlan_mc = rtl8366rb_get_vlan_mc, + .set_vlan_mc = rtl8366rb_set_vlan_mc, + .get_vlan_4k = rtl8366rb_get_vlan_4k, + .set_vlan_4k = rtl8366rb_set_vlan_4k, + .get_mc_index = rtl8366rb_get_mc_index, + .set_mc_index = rtl8366rb_set_mc_index, + .get_mib_counter = rtl8366rb_get_mib_counter, + .is_vlan_valid = rtl8366rb_is_vlan_valid, + .enable_vlan = rtl8366rb_enable_vlan, + .enable_vlan4k = rtl8366rb_enable_vlan4k, + .phy_read = rtl8366rb_phy_read, + .phy_write = rtl8366rb_phy_write, +}; + +const struct realtek_smi_variant rtl8366rb_variant = { + .ds_ops = &rtl8366rb_switch_ops, + .ops = &rtl8366rb_smi_ops, + .clk_delay = 10, + .cmd_read = 0xa9, + .cmd_write = 0xa8, + .chip_data_sz = sizeof(struct rtl8366rb), +}; +EXPORT_SYMBOL_GPL(rtl8366rb_variant); |