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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 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 | /* * 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/slab.h> #include <linux/module.h> #include <linux/of_address.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) { if (WARN_ONCE(!core->io_wrap, "Accessed core has no wrapper/agent\n")) return ~0; return readl(core->io_wrap + offset); } static void bcma_host_soc_awrite32(struct bcma_device *core, u16 offset, u32 value) { if (WARN_ONCE(!core->io_wrap, "Accessed core has no wrapper/agent\n")) return; 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; /* 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; bus->host_pdev = NULL; /* Initialize struct, detect chip */ bcma_init_bus(bus); return 0; } int __init bcma_host_soc_init(struct bcma_soc *soc) { struct bcma_bus *bus = &soc->bus; int err; /* Scan bus and initialize it */ err = bcma_bus_early_register(bus); if (err) iounmap(bus->mmio); return err; } #ifdef CONFIG_OF static int bcma_host_soc_probe(struct platform_device *pdev) { struct device *dev = &pdev->dev; struct device_node *np = dev->of_node; struct bcma_bus *bus; int err; /* Alloc */ bus = devm_kzalloc(dev, sizeof(*bus), GFP_KERNEL); if (!bus) return -ENOMEM; /* Map MMIO */ bus->mmio = of_iomap(np, 0); if (!bus->mmio) return -ENOMEM; /* Host specific */ bus->hosttype = BCMA_HOSTTYPE_SOC; bus->ops = &bcma_host_soc_ops; bus->host_pdev = pdev; /* Initialize struct, detect chip */ bcma_init_bus(bus); /* Register */ err = bcma_bus_register(bus); if (err) goto err_unmap_mmio; platform_set_drvdata(pdev, bus); return err; err_unmap_mmio: iounmap(bus->mmio); return err; } static int bcma_host_soc_remove(struct platform_device *pdev) { struct bcma_bus *bus = platform_get_drvdata(pdev); bcma_bus_unregister(bus); iounmap(bus->mmio); platform_set_drvdata(pdev, NULL); return 0; } static const struct of_device_id bcma_host_soc_of_match[] = { { .compatible = "brcm,bus-axi", }, {}, }; MODULE_DEVICE_TABLE(of, bcma_host_soc_of_match); static struct platform_driver bcma_host_soc_driver = { .driver = { .name = "bcma-host-soc", .of_match_table = bcma_host_soc_of_match, }, .probe = bcma_host_soc_probe, .remove = bcma_host_soc_remove, }; int __init bcma_host_soc_register_driver(void) { return platform_driver_register(&bcma_host_soc_driver); } void __exit bcma_host_soc_unregister_driver(void) { platform_driver_unregister(&bcma_host_soc_driver); } #endif /* CONFIG_OF */ |