1 // SPDX-License-Identifier: MIT
13 	/* for PCI ROM */
23 	u32 (*read32)(struct intel_rom *rom, loff_t offset);
24 	u16 (*read16)(struct intel_rom *rom, loff_t offset);
25 	void (*read_block)(struct intel_rom *rom, void *data, loff_t offset, size_t size);
26 	void (*free)(struct intel_rom *rom);
29 static u32 spi_read32(struct intel_rom *rom, loff_t offset)  in spi_read32()  argument
31 	intel_uncore_write(rom->uncore, PRIMARY_SPI_ADDRESS,  in spi_read32()
32 			   rom->offset + offset);  in spi_read32()
34 	return intel_uncore_read(rom->uncore, PRIMARY_SPI_TRIGGER);  in spi_read32()
37 static u16 spi_read16(struct intel_rom *rom, loff_t offset)  in spi_read16()  argument
39 	return spi_read32(rom, offset) & 0xffff;  in spi_read16()
44 	struct intel_rom *rom;  in intel_rom_spi()  local
47 	rom = kzalloc(sizeof(*rom), GFP_KERNEL);  in intel_rom_spi()
48 	if (!rom)  in intel_rom_spi()
51 	rom->uncore = &i915->uncore;  in intel_rom_spi()
53 	static_region = intel_uncore_read(rom->uncore, SPI_STATIC_REGIONS);  in intel_rom_spi()
55 	intel_uncore_write(rom->uncore, PRIMARY_SPI_REGIONID, static_region);  in intel_rom_spi()
57 	rom->offset = intel_uncore_read(rom->uncore, OROM_OFFSET) & OROM_OFFSET_MASK;  in intel_rom_spi()
59 	rom->size = 0x200000;  in intel_rom_spi()
61 	rom->read32 = spi_read32;  in intel_rom_spi()
62 	rom->read16 = spi_read16;  in intel_rom_spi()
64 	return rom;  in intel_rom_spi()
67 static u32 pci_read32(struct intel_rom *rom, loff_t offset)  in pci_read32()  argument
69 	return ioread32(rom->oprom + offset);  in pci_read32()
72 static u16 pci_read16(struct intel_rom *rom, loff_t offset)  in pci_read16()  argument
74 	return ioread16(rom->oprom + offset);  in pci_read16()
77 static void pci_read_block(struct intel_rom *rom, void *data,  in pci_read_block()  argument
80 	memcpy_fromio(data, rom->oprom + offset, size);  in pci_read_block()
83 static void pci_free(struct intel_rom *rom)  in pci_free()  argument
85 	pci_unmap_rom(rom->pdev, rom->oprom);  in pci_free()
90 	struct intel_rom *rom;  in intel_rom_pci()  local
92 	rom = kzalloc(sizeof(*rom), GFP_KERNEL);  in intel_rom_pci()
93 	if (!rom)  in intel_rom_pci()
96 	rom->pdev = to_pci_dev(i915->drm.dev);  in intel_rom_pci()
98 	rom->oprom = pci_map_rom(rom->pdev, &rom->size);  in intel_rom_pci()
99 	if (!rom->oprom) {  in intel_rom_pci()
100 		kfree(rom);  in intel_rom_pci()
104 	rom->read32 = pci_read32;  in intel_rom_pci()
105 	rom->read16 = pci_read16;  in intel_rom_pci()
106 	rom->read_block = pci_read_block;  in intel_rom_pci()
107 	rom->free = pci_free;  in intel_rom_pci()
109 	return rom;  in intel_rom_pci()
112 u32 intel_rom_read32(struct intel_rom *rom, loff_t offset)  in intel_rom_read32()  argument
114 	return rom->read32(rom, offset);  in intel_rom_read32()
117 u16 intel_rom_read16(struct intel_rom *rom, loff_t offset)  in intel_rom_read16()  argument
119 	return rom->read16(rom, offset);  in intel_rom_read16()
122 void intel_rom_read_block(struct intel_rom *rom, void *data,  in intel_rom_read_block()  argument
128 	if (rom->read_block) {  in intel_rom_read_block()
129 		rom->read_block(rom, data, offset, size);  in intel_rom_read_block()
134 		*ptr++ = rom->read32(rom, offset + index);  in intel_rom_read_block()
137 loff_t intel_rom_find(struct intel_rom *rom, u32 needle)  in intel_rom_find()  argument
141 	for (offset = 0; offset < rom->size; offset += 4) {  in intel_rom_find()
142 		if (rom->read32(rom, offset) == needle)  in intel_rom_find()
146 	return -ENOENT;  in intel_rom_find()
149 size_t intel_rom_size(struct intel_rom *rom)  in intel_rom_size()  argument
151 	return rom->size;  in intel_rom_size()
154 void intel_rom_free(struct intel_rom *rom)  in intel_rom_free()  argument
156 	if (rom && rom->free)  in intel_rom_free()
157 		rom->free(rom);  in intel_rom_free()
159 	kfree(rom);  in intel_rom_free()