1 /* SPDX-License-Identifier: GPL-2.0 */ 2 #ifndef __MACIO_ASIC_H__ 3 #define __MACIO_ASIC_H__ 4 #ifdef __KERNEL__ 5 6 #include <linux/of_device.h> 7 8 extern struct bus_type macio_bus_type; 9 10 /* MacIO device driver is defined later */ 11 struct macio_driver; 12 struct macio_chip; 13 14 #define MACIO_DEV_COUNT_RESOURCES 8 15 #define MACIO_DEV_COUNT_IRQS 8 16 17 /* 18 * the macio_bus structure is used to describe a "virtual" bus 19 * within a MacIO ASIC. It's typically provided by a macio_pci_asic 20 * PCI device, but could be provided differently as well (nubus 21 * machines using a fake OF tree). 22 * 23 * The pdev field can be NULL on non-PCI machines 24 */ 25 struct macio_bus 26 { 27 struct macio_chip *chip; /* macio_chip (private use) */ 28 int index; /* macio chip index in system */ 29 #ifdef CONFIG_PCI 30 struct pci_dev *pdev; /* PCI device hosting this bus */ 31 #endif 32 }; 33 34 /* 35 * the macio_dev structure is used to describe a device 36 * within an Apple MacIO ASIC. 37 */ 38 struct macio_dev 39 { 40 struct macio_bus *bus; /* macio bus this device is on */ 41 struct macio_dev *media_bay; /* Device is part of a media bay */ 42 struct platform_device ofdev; 43 struct device_dma_parameters dma_parms; /* ide needs that */ 44 int n_resources; 45 struct resource resource[MACIO_DEV_COUNT_RESOURCES]; 46 int n_interrupts; 47 struct resource interrupt[MACIO_DEV_COUNT_IRQS]; 48 }; 49 #define to_macio_device(d) container_of(d, struct macio_dev, ofdev.dev) 50 #define of_to_macio_device(d) container_of(d, struct macio_dev, ofdev) 51 52 extern struct macio_dev *macio_dev_get(struct macio_dev *dev); 53 extern void macio_dev_put(struct macio_dev *dev); 54 55 /* 56 * Accessors to resources & interrupts and other device 57 * fields 58 */ 59 60 static inline int macio_resource_count(struct macio_dev *dev) 61 { 62 return dev->n_resources; 63 } 64 65 static inline unsigned long macio_resource_start(struct macio_dev *dev, int resource_no) 66 { 67 return dev->resource[resource_no].start; 68 } 69 70 static inline unsigned long macio_resource_end(struct macio_dev *dev, int resource_no) 71 { 72 return dev->resource[resource_no].end; 73 } 74 75 static inline unsigned long macio_resource_len(struct macio_dev *dev, int resource_no) 76 { 77 struct resource *res = &dev->resource[resource_no]; 78 if (res->start == 0 || res->end == 0 || res->end < res->start) 79 return 0; 80 return resource_size(res); 81 } 82 83 extern int macio_enable_devres(struct macio_dev *dev); 84 85 extern int macio_request_resource(struct macio_dev *dev, int resource_no, const char *name); 86 extern void macio_release_resource(struct macio_dev *dev, int resource_no); 87 extern int macio_request_resources(struct macio_dev *dev, const char *name); 88 extern void macio_release_resources(struct macio_dev *dev); 89 90 static inline int macio_irq_count(struct macio_dev *dev) 91 { 92 return dev->n_interrupts; 93 } 94 95 static inline int macio_irq(struct macio_dev *dev, int irq_no) 96 { 97 return dev->interrupt[irq_no].start; 98 } 99 100 static inline void macio_set_drvdata(struct macio_dev *dev, void *data) 101 { 102 dev_set_drvdata(&dev->ofdev.dev, data); 103 } 104 105 static inline void* macio_get_drvdata(struct macio_dev *dev) 106 { 107 return dev_get_drvdata(&dev->ofdev.dev); 108 } 109 110 static inline struct device_node *macio_get_of_node(struct macio_dev *mdev) 111 { 112 return mdev->ofdev.dev.of_node; 113 } 114 115 #ifdef CONFIG_PCI 116 static inline struct pci_dev *macio_get_pci_dev(struct macio_dev *mdev) 117 { 118 return mdev->bus->pdev; 119 } 120 #endif 121 122 /* 123 * A driver for a mac-io chip based device 124 */ 125 struct macio_driver 126 { 127 int (*probe)(struct macio_dev* dev, const struct of_device_id *match); 128 int (*remove)(struct macio_dev* dev); 129 130 int (*suspend)(struct macio_dev* dev, pm_message_t state); 131 int (*resume)(struct macio_dev* dev); 132 int (*shutdown)(struct macio_dev* dev); 133 134 #ifdef CONFIG_PMAC_MEDIABAY 135 void (*mediabay_event)(struct macio_dev* dev, int mb_state); 136 #endif 137 struct device_driver driver; 138 }; 139 #define to_macio_driver(drv) container_of(drv,struct macio_driver, driver) 140 141 extern int macio_register_driver(struct macio_driver *); 142 extern void macio_unregister_driver(struct macio_driver *); 143 144 #endif /* __KERNEL__ */ 145 #endif /* __MACIO_ASIC_H__ */ 146