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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 | /* * Broadcom specific AMBA * System on Chip (SoC) Host * * Licensed under the GNU/GPL. See COPYING for details. */ #include "bcma_private.h" #include "scan.h" #include <linux/bcma/bcma.h> #include <linux/bcma/bcma_soc.h> static u8 bcma_host_soc_read8(struct bcma_device *core, u16 offset) { return readb(core->io_addr + offset); } static u16 bcma_host_soc_read16(struct bcma_device *core, u16 offset) { return readw(core->io_addr + offset); } static u32 bcma_host_soc_read32(struct bcma_device *core, u16 offset) { return readl(core->io_addr + offset); } static void bcma_host_soc_write8(struct bcma_device *core, u16 offset, u8 value) { writeb(value, core->io_addr + offset); } static void bcma_host_soc_write16(struct bcma_device *core, u16 offset, u16 value) { writew(value, core->io_addr + offset); } static void bcma_host_soc_write32(struct bcma_device *core, u16 offset, u32 value) { writel(value, core->io_addr + offset); } #ifdef CONFIG_BCMA_BLOCKIO static void bcma_host_soc_block_read(struct bcma_device *core, void *buffer, size_t count, u16 offset, u8 reg_width) { void __iomem *addr = core->io_addr + offset; switch (reg_width) { case sizeof(u8): { u8 *buf = buffer; while (count) { *buf = __raw_readb(addr); buf++; count--; } break; } case sizeof(u16): { __le16 *buf = buffer; WARN_ON(count & 1); while (count) { *buf = (__force __le16)__raw_readw(addr); buf++; count -= 2; } break; } case sizeof(u32): { __le32 *buf = buffer; WARN_ON(count & 3); while (count) { *buf = (__force __le32)__raw_readl(addr); buf++; count -= 4; } break; } default: WARN_ON(1); } } static void bcma_host_soc_block_write(struct bcma_device *core, const void *buffer, size_t count, u16 offset, u8 reg_width) { void __iomem *addr = core->io_addr + offset; switch (reg_width) { case sizeof(u8): { const u8 *buf = buffer; while (count) { __raw_writeb(*buf, addr); buf++; count--; } break; } case sizeof(u16): { const __le16 *buf = buffer; WARN_ON(count & 1); while (count) { __raw_writew((__force u16)(*buf), addr); buf++; count -= 2; } break; } case sizeof(u32): { const __le32 *buf = buffer; WARN_ON(count & 3); while (count) { __raw_writel((__force u32)(*buf), addr); buf++; count -= 4; } break; } default: WARN_ON(1); } } #endif /* CONFIG_BCMA_BLOCKIO */ static u32 bcma_host_soc_aread32(struct bcma_device *core, u16 offset) { return readl(core->io_wrap + offset); } static void bcma_host_soc_awrite32(struct bcma_device *core, u16 offset, u32 value) { writel(value, core->io_wrap + offset); } static const struct bcma_host_ops bcma_host_soc_ops = { .read8 = bcma_host_soc_read8, .read16 = bcma_host_soc_read16, .read32 = bcma_host_soc_read32, .write8 = bcma_host_soc_write8, .write16 = bcma_host_soc_write16, .write32 = bcma_host_soc_write32, #ifdef CONFIG_BCMA_BLOCKIO .block_read = bcma_host_soc_block_read, .block_write = bcma_host_soc_block_write, #endif .aread32 = bcma_host_soc_aread32, .awrite32 = bcma_host_soc_awrite32, }; int __init bcma_host_soc_register(struct bcma_soc *soc) { struct bcma_bus *bus = &soc->bus; int err; /* iomap only first core. We have to read some register on this core * to scan the bus. */ bus->mmio = ioremap_nocache(BCMA_ADDR_BASE, BCMA_CORE_SIZE * 1); if (!bus->mmio) return -ENOMEM; /* Host specific */ bus->hosttype = BCMA_HOSTTYPE_SOC; bus->ops = &bcma_host_soc_ops; /* Register */ err = bcma_bus_early_register(bus, &soc->core_cc, &soc->core_mips); if (err) iounmap(bus->mmio); return err; } |