xref: /linux/drivers/net/dsa/vitesse-vsc73xx.h (revision 9410645520e9b820069761f3450ef6661418e279)
1 /* SPDX-License-Identifier: GPL-2.0 */
2 #include <linux/device.h>
3 #include <linux/etherdevice.h>
4 #include <linux/gpio/driver.h>
5 
6 /* The VSC7395 switch chips have 5+1 ports which means 5 ordinary ports and
7  * a sixth CPU port facing the processor with an RGMII interface. These ports
8  * are numbered 0..4 and 6, so they leave a "hole" in the port map for port 5,
9  * which is invalid.
10  *
11  * The VSC7398 has 8 ports, port 7 is again the CPU port.
12  *
13  * We allocate 8 ports and avoid access to the nonexistent ports.
14  */
15 #define VSC73XX_MAX_NUM_PORTS	8
16 
17 /**
18  * struct vsc73xx_portinfo - port data structure: contains storage data
19  * @pvid_vlan_filtering: pvid vlan number used in vlan filtering mode
20  * @pvid_tag_8021q: pvid vlan number used in tag_8021q mode
21  * @pvid_vlan_filtering_configured: informs if port has configured pvid in vlan
22  *	filtering mode
23  * @pvid_tag_8021q_configured: imforms if port have configured pvid in tag_8021q
24  *	mode
25  */
26 struct vsc73xx_portinfo {
27 	u16		pvid_vlan_filtering;
28 	u16		pvid_tag_8021q;
29 	bool		pvid_vlan_filtering_configured;
30 	bool		pvid_tag_8021q_configured;
31 };
32 
33 /**
34  * struct vsc73xx - VSC73xx state container: main data structure
35  * @dev: The device pointer
36  * @reset: The descriptor for the GPIO line tied to the reset pin
37  * @ds: Pointer to the DSA core structure
38  * @gc: Main structure of the GPIO controller
39  * @chipid: Storage for the Chip ID value read from the CHIPID register of the
40  *	switch
41  * @addr: MAC address used in flow control frames
42  * @ops: Structure with hardware-dependent operations
43  * @priv: Pointer to the configuration interface structure
44  * @portinfo: Storage table portinfo structructures
45  * @vlans: List of configured vlans. Contains port mask and untagged status of
46  *	every vlan configured in port vlan operation. It doesn't cover tag_8021q
47  *	vlans.
48  * @fdb_lock: Mutex protects fdb access
49  */
50 struct vsc73xx {
51 	struct device			*dev;
52 	struct gpio_desc		*reset;
53 	struct dsa_switch		*ds;
54 	struct gpio_chip		gc;
55 	u16				chipid;
56 	u8				addr[ETH_ALEN];
57 	const struct vsc73xx_ops	*ops;
58 	void				*priv;
59 	struct vsc73xx_portinfo		portinfo[VSC73XX_MAX_NUM_PORTS];
60 	struct list_head		vlans;
61 	struct mutex			fdb_lock;
62 };
63 
64 /**
65  * struct vsc73xx_ops - VSC73xx methods container
66  * @read: Method for register reading over the hardware-dependent interface
67  * @write: Method for register writing over the hardware-dependent interface
68  */
69 struct vsc73xx_ops {
70 	int (*read)(struct vsc73xx *vsc, u8 block, u8 subblock, u8 reg,
71 		    u32 *val);
72 	int (*write)(struct vsc73xx *vsc, u8 block, u8 subblock, u8 reg,
73 		     u32 val);
74 };
75 
76 /**
77  * struct vsc73xx_bridge_vlan - VSC73xx driver structure which keeps vlan
78  *	database copy
79  * @vid: VLAN number
80  * @portmask: each bit represents one port
81  * @untagged: each bit represents one port configured with @vid untagged
82  * @list: list structure
83  */
84 struct vsc73xx_bridge_vlan {
85 	u16 vid;
86 	u8 portmask;
87 	u8 untagged;
88 	struct list_head list;
89 };
90 
91 int vsc73xx_is_addr_valid(u8 block, u8 subblock);
92 int vsc73xx_probe(struct vsc73xx *vsc);
93 void vsc73xx_remove(struct vsc73xx *vsc);
94 void vsc73xx_shutdown(struct vsc73xx *vsc);
95