drivers/net/dsa/microchip/ksz_common.h

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 /* Microchip switch driver common header
   3  *
   4  * Copyright (C) 2017-2019 Microchip Technology Inc.
   5  */
   6
   7 #ifndef __KSZ_COMMON_H
   8 #define __KSZ_COMMON_H
   9
  10 #include <linux/etherdevice.h>
  11 #include <linux/kernel.h>
  12 #include <linux/mutex.h>
  13 #include <linux/phy.h>
  14 #include <linux/regmap.h>
  15 #include <net/dsa.h>
  16
  17 struct vlan_table {
  18         u32 table[3];
  19 };
  20
  21 struct ksz_port_mib {
  22         struct mutex cnt_mutex;         /* structure access */
  23         u8 cnt_ptr;
  24         u64 *counters;
  25 };
  26
  27 struct ksz_port {
  28         u16 member;
  29         u16 vid_member;
  30         int stp_state;
  31         struct phy_device phydev;
  32
  33         u32 on:1;                       /* port is not disabled by hardware */
  34         u32 phy:1;                      /* port has a PHY */
  35         u32 fiber:1;                    /* port is fiber */
  36         u32 sgmii:1;                    /* port is SGMII */
  37         u32 force:1;
  38         u32 read:1;                     /* read MIB counters in background */
  39         u32 freeze:1;                   /* MIB counter freeze is enabled */
  40
  41         struct ksz_port_mib mib;
  42         phy_interface_t interface;
  43 };
  44
  45 struct ksz_device {
  46         struct dsa_switch *ds;
  47         struct ksz_platform_data *pdata;
  48         const char *name;
  49
  50         struct mutex dev_mutex;         /* device access */
  51         struct mutex regmap_mutex;      /* regmap access */
  52         struct mutex alu_mutex;         /* ALU access */
  53         struct mutex vlan_mutex;        /* vlan access */
  54         const struct ksz_dev_ops *dev_ops;
  55
  56         struct device *dev;
  57         struct regmap *regmap[3];
  58
  59         void *priv;
  60
  61         struct gpio_desc *reset_gpio;   /* Optional reset GPIO */
  62
  63         /* chip specific data */
  64         u32 chip_id;
  65         int num_vlans;
  66         int num_alus;
  67         int num_statics;
  68         int cpu_port;                   /* port connected to CPU */
  69         int cpu_ports;                  /* port bitmap can be cpu port */
  70         int phy_port_cnt;
  71         int port_cnt;
  72         int reg_mib_cnt;
  73         int mib_cnt;
  74         phy_interface_t compat_interface;
  75         u32 regs_size;
  76         bool phy_errata_9477;
  77         bool synclko_125;
  78
  79         struct vlan_table *vlan_cache;
  80
  81         struct ksz_port *ports;
  82         struct delayed_work mib_read;
  83         unsigned long mib_read_interval;
  84         u16 br_member;
  85         u16 member;
  86         u16 mirror_rx;
  87         u16 mirror_tx;
  88         u32 features;                   /* chip specific features */
  89         u32 overrides;                  /* chip functions set by user */
  90         u16 host_mask;
  91         u16 port_mask;
  92 };
  93
  94 struct alu_struct {
  95         /* entry 1 */
  96         u8      is_static:1;
  97         u8      is_src_filter:1;
  98         u8      is_dst_filter:1;
  99         u8      prio_age:3;
 100         u32     _reserv_0_1:23;
 101         u8      mstp:3;
 102         /* entry 2 */
 103         u8      is_override:1;
 104         u8      is_use_fid:1;
 105         u32     _reserv_1_1:23;
 106         u8      port_forward:7;
 107         /* entry 3 & 4*/
 108         u32     _reserv_2_1:9;
 109         u8      fid:7;
 110         u8      mac[ETH_ALEN];
 111 };
 112
 113 struct ksz_dev_ops {
 114         u32 (*get_port_addr)(int port, int offset);
 115         void (*cfg_port_member)(struct ksz_device *dev, int port, u8 member);
 116         void (*flush_dyn_mac_table)(struct ksz_device *dev, int port);
 117         void (*port_cleanup)(struct ksz_device *dev, int port);
 118         void (*port_setup)(struct ksz_device *dev, int port, bool cpu_port);
 119         void (*r_phy)(struct ksz_device *dev, u16 phy, u16 reg, u16 *val);
 120         void (*w_phy)(struct ksz_device *dev, u16 phy, u16 reg, u16 val);
 121         int (*r_dyn_mac_table)(struct ksz_device *dev, u16 addr, u8 *mac_addr,
 122                                u8 *fid, u8 *src_port, u8 *timestamp,
 123                                u16 *entries);
 124         int (*r_sta_mac_table)(struct ksz_device *dev, u16 addr,
 125                                struct alu_struct *alu);
 126         void (*w_sta_mac_table)(struct ksz_device *dev, u16 addr,
 127                                 struct alu_struct *alu);
 128         void (*r_mib_cnt)(struct ksz_device *dev, int port, u16 addr,
 129                           u64 *cnt);
 130         void (*r_mib_pkt)(struct ksz_device *dev, int port, u16 addr,
 131                           u64 *dropped, u64 *cnt);
 132         void (*freeze_mib)(struct ksz_device *dev, int port, bool freeze);
 133         void (*port_init_cnt)(struct ksz_device *dev, int port);
 134         int (*shutdown)(struct ksz_device *dev);
 135         int (*detect)(struct ksz_device *dev);
 136         int (*init)(struct ksz_device *dev);
 137         void (*exit)(struct ksz_device *dev);
 138 };
 139
 140 struct ksz_device *ksz_switch_alloc(struct device *base, void *priv);
 141 int ksz_switch_register(struct ksz_device *dev,
 142                         const struct ksz_dev_ops *ops);
 143 void ksz_switch_remove(struct ksz_device *dev);
 144
 145 int ksz8795_switch_register(struct ksz_device *dev);
 146 int ksz9477_switch_register(struct ksz_device *dev);
 147
 148 void ksz_update_port_member(struct ksz_device *dev, int port);
 149 void ksz_init_mib_timer(struct ksz_device *dev);
 150
 151 /* Common DSA access functions */
 152
 153 int ksz_phy_read16(struct dsa_switch *ds, int addr, int reg);
 154 int ksz_phy_write16(struct dsa_switch *ds, int addr, int reg, u16 val);
 155 void ksz_mac_link_down(struct dsa_switch *ds, int port, unsigned int mode,
 156                        phy_interface_t interface);
 157 int ksz_sset_count(struct dsa_switch *ds, int port, int sset);
 158 void ksz_get_ethtool_stats(struct dsa_switch *ds, int port, uint64_t *buf);
 159 int ksz_port_bridge_join(struct dsa_switch *ds, int port,
 160                          struct net_device *br);
 161 void ksz_port_bridge_leave(struct dsa_switch *ds, int port,
 162                            struct net_device *br);
 163 void ksz_port_fast_age(struct dsa_switch *ds, int port);
 164 int ksz_port_vlan_prepare(struct dsa_switch *ds, int port,
 165                           const struct switchdev_obj_port_vlan *vlan);
 166 int ksz_port_fdb_dump(struct dsa_switch *ds, int port, dsa_fdb_dump_cb_t *cb,
 167                       void *data);
 168 int ksz_port_mdb_prepare(struct dsa_switch *ds, int port,
 169                          const struct switchdev_obj_port_mdb *mdb);
 170 void ksz_port_mdb_add(struct dsa_switch *ds, int port,
 171                       const struct switchdev_obj_port_mdb *mdb);
 172 int ksz_port_mdb_del(struct dsa_switch *ds, int port,
 173                      const struct switchdev_obj_port_mdb *mdb);
 174 int ksz_enable_port(struct dsa_switch *ds, int port, struct phy_device *phy);
 175
 176 /* Common register access functions */
 177
 178 static inline int ksz_read8(struct ksz_device *dev, u32 reg, u8 *val)
 179 {
 180         unsigned int value;
 181         int ret = regmap_read(dev->regmap[0], reg, &value);
 182
 183         *val = value;
 184         return ret;
 185 }
 186
 187 static inline int ksz_read16(struct ksz_device *dev, u32 reg, u16 *val)
 188 {
 189         unsigned int value;
 190         int ret = regmap_read(dev->regmap[1], reg, &value);
 191
 192         *val = value;
 193         return ret;
 194 }
 195
 196 static inline int ksz_read32(struct ksz_device *dev, u32 reg, u32 *val)
 197 {
 198         unsigned int value;
 199         int ret = regmap_read(dev->regmap[2], reg, &value);
 200
 201         *val = value;
 202         return ret;
 203 }
 204
 205 static inline int ksz_read64(struct ksz_device *dev, u32 reg, u64 *val)
 206 {
 207         u32 value[2];
 208         int ret;
 209
 210         ret = regmap_bulk_read(dev->regmap[2], reg, value, 2);
 211         if (!ret) {
 212                 /* Ick! ToDo: Add 64bit R/W to regmap on 32bit systems */
 213                 value[0] = swab32(value[0]);
 214                 value[1] = swab32(value[1]);
 215                 *val = swab64((u64)*value);
 216         }
 217
 218         return ret;
 219 }
 220
 221 static inline int ksz_write8(struct ksz_device *dev, u32 reg, u8 value)
 222 {
 223         return regmap_write(dev->regmap[0], reg, value);
 224 }
 225
 226 static inline int ksz_write16(struct ksz_device *dev, u32 reg, u16 value)
 227 {
 228         return regmap_write(dev->regmap[1], reg, value);
 229 }
 230
 231 static inline int ksz_write32(struct ksz_device *dev, u32 reg, u32 value)
 232 {
 233         return regmap_write(dev->regmap[2], reg, value);
 234 }
 235
 236 static inline int ksz_write64(struct ksz_device *dev, u32 reg, u64 value)
 237 {
 238         u32 val[2];
 239
 240         /* Ick! ToDo: Add 64bit R/W to regmap on 32bit systems */
 241         value = swab64(value);
 242         val[0] = swab32(value & 0xffffffffULL);
 243         val[1] = swab32(value >> 32ULL);
 244
 245         return regmap_bulk_write(dev->regmap[2], reg, val, 2);
 246 }
 247
 248 static inline void ksz_pread8(struct ksz_device *dev, int port, int offset,
 249                               u8 *data)
 250 {
 251         ksz_read8(dev, dev->dev_ops->get_port_addr(port, offset), data);
 252 }
 253
 254 static inline void ksz_pread16(struct ksz_device *dev, int port, int offset,
 255                                u16 *data)
 256 {
 257         ksz_read16(dev, dev->dev_ops->get_port_addr(port, offset), data);
 258 }
 259
 260 static inline void ksz_pread32(struct ksz_device *dev, int port, int offset,
 261                                u32 *data)
 262 {
 263         ksz_read32(dev, dev->dev_ops->get_port_addr(port, offset), data);
 264 }
 265
 266 static inline void ksz_pwrite8(struct ksz_device *dev, int port, int offset,
 267                                u8 data)
 268 {
 269         ksz_write8(dev, dev->dev_ops->get_port_addr(port, offset), data);
 270 }
 271
 272 static inline void ksz_pwrite16(struct ksz_device *dev, int port, int offset,
 273                                 u16 data)
 274 {
 275         ksz_write16(dev, dev->dev_ops->get_port_addr(port, offset), data);
 276 }
 277
 278 static inline void ksz_pwrite32(struct ksz_device *dev, int port, int offset,
 279                                 u32 data)
 280 {
 281         ksz_write32(dev, dev->dev_ops->get_port_addr(port, offset), data);
 282 }
 283
 284 static inline void ksz_regmap_lock(void *__mtx)
 285 {
 286         struct mutex *mtx = __mtx;
 287         mutex_lock(mtx);
 288 }
 289
 290 static inline void ksz_regmap_unlock(void *__mtx)
 291 {
 292         struct mutex *mtx = __mtx;
 293         mutex_unlock(mtx);
 294 }
 295
 296 /* Regmap tables generation */
 297 #define KSZ_SPI_OP_RD           3
 298 #define KSZ_SPI_OP_WR           2
 299
 300 #define swabnot_used(x)         0
 301
 302 #define KSZ_SPI_OP_FLAG_MASK(opcode, swp, regbits, regpad)              \
 303         swab##swp((opcode) << ((regbits) + (regpad)))
 304
 305 #define KSZ_REGMAP_ENTRY(width, swp, regbits, regpad, regalign)         \
 306         {                                                               \
 307                 .name = #width,                                         \
 308                 .val_bits = (width),                                    \
 309                 .reg_stride = 1,                                        \
 310                 .reg_bits = (regbits) + (regalign),                     \
 311                 .pad_bits = (regpad),                                   \
 312                 .max_register = BIT(regbits) - 1,                       \
 313                 .cache_type = REGCACHE_NONE,                            \
 314                 .read_flag_mask =                                       \
 315                         KSZ_SPI_OP_FLAG_MASK(KSZ_SPI_OP_RD, swp,        \
 316                                              regbits, regpad),          \
 317                 .write_flag_mask =                                      \
 318                         KSZ_SPI_OP_FLAG_MASK(KSZ_SPI_OP_WR, swp,        \
 319                                              regbits, regpad),          \
 320                 .lock = ksz_regmap_lock,                                \
 321                 .unlock = ksz_regmap_unlock,                            \
 322                 .reg_format_endian = REGMAP_ENDIAN_BIG,                 \
 323                 .val_format_endian = REGMAP_ENDIAN_BIG                  \
 324         }
 325
 326 #define KSZ_REGMAP_TABLE(ksz, swp, regbits, regpad, regalign)           \
 327         static const struct regmap_config ksz##_regmap_config[] = {     \
 328                 KSZ_REGMAP_ENTRY(8, swp, (regbits), (regpad), (regalign)), \
 329                 KSZ_REGMAP_ENTRY(16, swp, (regbits), (regpad), (regalign)), \
 330                 KSZ_REGMAP_ENTRY(32, swp, (regbits), (regpad), (regalign)), \
 331         }
 332
 333 #endif