tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
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 - VSC73xx state container: main data structure
19 * @dev: The device pointer
20 * @reset: The descriptor for the GPIO line tied to the reset pin
21 * @ds: Pointer to the DSA core structure
22 * @gc: Main structure of the GPIO controller
23 * @chipid: Storage for the Chip ID value read from the CHIPID register of the
24 * switch
25 * @addr: MAC address used in flow control frames
26 * @ops: Structure with hardware-dependent operations
27 * @priv: Pointer to the configuration interface structure
28 */
29struct vsc73xx {
30 struct device *dev;
31 struct gpio_desc *reset;
32 struct dsa_switch *ds;
33 struct gpio_chip gc;
34 u16 chipid;
35 u8 addr[ETH_ALEN];
36 const struct vsc73xx_ops *ops;
37 void *priv;
38};
39
40/**
41 * struct vsc73xx_ops - VSC73xx methods container
42 * @read: Method for register reading over the hardware-dependent interface
43 * @write: Method for register writing over the hardware-dependent interface
44 */
45struct vsc73xx_ops {
46 int (*read)(struct vsc73xx *vsc, u8 block, u8 subblock, u8 reg,
47 u32 *val);
48 int (*write)(struct vsc73xx *vsc, u8 block, u8 subblock, u8 reg,
49 u32 val);
50};
51
52int vsc73xx_is_addr_valid(u8 block, u8 subblock);
53int vsc73xx_probe(struct vsc73xx *vsc);
54void vsc73xx_remove(struct vsc73xx *vsc);
55void vsc73xx_shutdown(struct vsc73xx *vsc);