56 lines
1.8 KiB
C
56 lines
1.8 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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#include <linux/device.h>
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#include <linux/etherdevice.h>
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#include <linux/gpio/driver.h>
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/* The VSC7395 switch chips have 5+1 ports which means 5 ordinary ports and
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* a sixth CPU port facing the processor with an RGMII interface. These ports
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* are numbered 0..4 and 6, so they leave a "hole" in the port map for port 5,
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* which is invalid.
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*
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* The VSC7398 has 8 ports, port 7 is again the CPU port.
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*
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* We allocate 8 ports and avoid access to the nonexistent ports.
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*/
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#define VSC73XX_MAX_NUM_PORTS 8
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/**
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* struct vsc73xx - VSC73xx state container: main data structure
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* @dev: The device pointer
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* @reset: The descriptor for the GPIO line tied to the reset pin
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* @ds: Pointer to the DSA core structure
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* @gc: Main structure of the GPIO controller
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* @chipid: Storage for the Chip ID value read from the CHIPID register of the
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* switch
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* @addr: MAC address used in flow control frames
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* @ops: Structure with hardware-dependent operations
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* @priv: Pointer to the configuration interface structure
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*/
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struct vsc73xx {
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struct device *dev;
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struct gpio_desc *reset;
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struct dsa_switch *ds;
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struct gpio_chip gc;
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u16 chipid;
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u8 addr[ETH_ALEN];
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const struct vsc73xx_ops *ops;
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void *priv;
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};
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/**
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* struct vsc73xx_ops - VSC73xx methods container
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* @read: Method for register reading over the hardware-dependent interface
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* @write: Method for register writing over the hardware-dependent interface
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*/
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struct vsc73xx_ops {
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int (*read)(struct vsc73xx *vsc, u8 block, u8 subblock, u8 reg,
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u32 *val);
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int (*write)(struct vsc73xx *vsc, u8 block, u8 subblock, u8 reg,
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u32 val);
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};
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int vsc73xx_is_addr_valid(u8 block, u8 subblock);
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int vsc73xx_probe(struct vsc73xx *vsc);
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void vsc73xx_remove(struct vsc73xx *vsc);
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void vsc73xx_shutdown(struct vsc73xx *vsc);
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