Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2 | * PPC System library functions |
| 3 | * |
Kumar Gala | 4c8d3d9 | 2005-11-13 16:06:30 -0800 | [diff] [blame] | 4 | * Maintainer: Kumar Gala <galak@kernel.crashing.org> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5 | * |
| 6 | * Copyright 2005 Freescale Semiconductor Inc. |
Kumar Gala | 88adfe7 | 2005-09-03 15:55:46 -0700 | [diff] [blame] | 7 | * Copyright 2005 MontaVista, Inc. by Vitaly Bordug <vbordug@ru.mvista.com> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 8 | * |
| 9 | * This program is free software; you can redistribute it and/or modify it |
| 10 | * under the terms of the GNU General Public License as published by the |
| 11 | * Free Software Foundation; either version 2 of the License, or (at your |
| 12 | * option) any later version. |
| 13 | */ |
| 14 | |
Tim Schmielau | 8c65b4a | 2005-11-07 00:59:43 -0800 | [diff] [blame] | 15 | #include <linux/string.h> |
Vitaly Bordug | 75288c7 | 2006-01-20 22:22:34 +0300 | [diff] [blame] | 16 | #include <linux/bootmem.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 17 | #include <asm/ppc_sys.h> |
| 18 | |
| 19 | int (*ppc_sys_device_fixup) (struct platform_device * pdev); |
| 20 | |
| 21 | static int ppc_sys_inited; |
Vitaly Bordug | 75288c7 | 2006-01-20 22:22:34 +0300 | [diff] [blame] | 22 | static int ppc_sys_func_inited; |
| 23 | |
| 24 | static const char *ppc_sys_func_names[] = { |
| 25 | [PPC_SYS_FUNC_DUMMY] = "dummy", |
| 26 | [PPC_SYS_FUNC_ETH] = "eth", |
| 27 | [PPC_SYS_FUNC_UART] = "uart", |
| 28 | [PPC_SYS_FUNC_HLDC] = "hldc", |
| 29 | [PPC_SYS_FUNC_USB] = "usb", |
| 30 | [PPC_SYS_FUNC_IRDA] = "irda", |
| 31 | }; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 32 | |
| 33 | void __init identify_ppc_sys_by_id(u32 id) |
| 34 | { |
| 35 | unsigned int i = 0; |
| 36 | while (1) { |
| 37 | if ((ppc_sys_specs[i].mask & id) == ppc_sys_specs[i].value) |
| 38 | break; |
| 39 | i++; |
| 40 | } |
| 41 | |
| 42 | cur_ppc_sys_spec = &ppc_sys_specs[i]; |
| 43 | |
| 44 | return; |
| 45 | } |
| 46 | |
| 47 | void __init identify_ppc_sys_by_name(char *name) |
| 48 | { |
Kumar Gala | 88adfe7 | 2005-09-03 15:55:46 -0700 | [diff] [blame] | 49 | unsigned int i = 0; |
Vitaly Bordug | 75288c7 | 2006-01-20 22:22:34 +0300 | [diff] [blame] | 50 | while (ppc_sys_specs[i].ppc_sys_name[0]) { |
Kumar Gala | 88adfe7 | 2005-09-03 15:55:46 -0700 | [diff] [blame] | 51 | if (!strcmp(ppc_sys_specs[i].ppc_sys_name, name)) |
| 52 | break; |
| 53 | i++; |
| 54 | } |
| 55 | cur_ppc_sys_spec = &ppc_sys_specs[i]; |
Vitaly Bordug | 75288c7 | 2006-01-20 22:22:34 +0300 | [diff] [blame] | 56 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 57 | return; |
| 58 | } |
| 59 | |
Kumar Gala | 88adfe7 | 2005-09-03 15:55:46 -0700 | [diff] [blame] | 60 | static int __init count_sys_specs(void) |
| 61 | { |
| 62 | int i = 0; |
| 63 | while (ppc_sys_specs[i].ppc_sys_name[0]) |
| 64 | i++; |
| 65 | return i; |
| 66 | } |
| 67 | |
| 68 | static int __init find_chip_by_name_and_id(char *name, u32 id) |
| 69 | { |
| 70 | int ret = -1; |
| 71 | unsigned int i = 0; |
| 72 | unsigned int j = 0; |
| 73 | unsigned int dups = 0; |
| 74 | |
| 75 | unsigned char matched[count_sys_specs()]; |
| 76 | |
| 77 | while (ppc_sys_specs[i].ppc_sys_name[0]) { |
| 78 | if (!strcmp(ppc_sys_specs[i].ppc_sys_name, name)) |
| 79 | matched[j++] = i; |
| 80 | i++; |
| 81 | } |
Vitaly Bordug | 1461b4e | 2005-10-28 17:46:28 -0700 | [diff] [blame] | 82 | |
| 83 | ret = i; |
| 84 | |
Kumar Gala | 88adfe7 | 2005-09-03 15:55:46 -0700 | [diff] [blame] | 85 | if (j != 0) { |
| 86 | for (i = 0; i < j; i++) { |
| 87 | if ((ppc_sys_specs[matched[i]].mask & id) == |
| 88 | ppc_sys_specs[matched[i]].value) { |
| 89 | ret = matched[i]; |
| 90 | dups++; |
| 91 | } |
| 92 | } |
| 93 | ret = (dups == 1) ? ret : (-1 * dups); |
| 94 | } |
| 95 | return ret; |
| 96 | } |
| 97 | |
| 98 | void __init identify_ppc_sys_by_name_and_id(char *name, u32 id) |
| 99 | { |
| 100 | int i = find_chip_by_name_and_id(name, id); |
| 101 | BUG_ON(i < 0); |
| 102 | cur_ppc_sys_spec = &ppc_sys_specs[i]; |
| 103 | } |
| 104 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 105 | /* Update all memory resources by paddr, call before platform_device_register */ |
| 106 | void __init |
| 107 | ppc_sys_fixup_mem_resource(struct platform_device *pdev, phys_addr_t paddr) |
| 108 | { |
| 109 | int i; |
| 110 | for (i = 0; i < pdev->num_resources; i++) { |
| 111 | struct resource *r = &pdev->resource[i]; |
| 112 | if ((r->flags & IORESOURCE_MEM) == IORESOURCE_MEM) { |
| 113 | r->start += paddr; |
| 114 | r->end += paddr; |
| 115 | } |
| 116 | } |
| 117 | } |
| 118 | |
| 119 | /* Get platform_data pointer out of platform device, call before platform_device_register */ |
| 120 | void *__init ppc_sys_get_pdata(enum ppc_sys_devices dev) |
| 121 | { |
| 122 | return ppc_sys_platform_devices[dev].dev.platform_data; |
| 123 | } |
| 124 | |
| 125 | void ppc_sys_device_remove(enum ppc_sys_devices dev) |
| 126 | { |
| 127 | unsigned int i; |
| 128 | |
| 129 | if (ppc_sys_inited) { |
| 130 | platform_device_unregister(&ppc_sys_platform_devices[dev]); |
| 131 | } else { |
| 132 | if (cur_ppc_sys_spec == NULL) |
| 133 | return; |
| 134 | for (i = 0; i < cur_ppc_sys_spec->num_devices; i++) |
| 135 | if (cur_ppc_sys_spec->device_list[i] == dev) |
| 136 | cur_ppc_sys_spec->device_list[i] = -1; |
| 137 | } |
| 138 | } |
| 139 | |
Vitaly Bordug | 75288c7 | 2006-01-20 22:22:34 +0300 | [diff] [blame] | 140 | /* Platform-notify mapping |
| 141 | * Helper function for BSP code to assign board-specific platfom-divice bits |
| 142 | */ |
| 143 | |
| 144 | void platform_notify_map(const struct platform_notify_dev_map *map, |
| 145 | struct device *dev) |
| 146 | { |
| 147 | struct platform_device *pdev; |
| 148 | int len, idx; |
| 149 | const char *s; |
| 150 | |
| 151 | /* do nothing if no device or no bus_id */ |
| 152 | if (!dev || !dev->bus_id) |
| 153 | return; |
| 154 | |
| 155 | /* call per device map */ |
| 156 | while (map->bus_id != NULL) { |
| 157 | idx = -1; |
| 158 | s = strrchr(dev->bus_id, '.'); |
| 159 | if (s != NULL) |
| 160 | idx = (int)simple_strtol(s + 1, NULL, 10); |
| 161 | else |
| 162 | s = dev->bus_id; |
| 163 | |
| 164 | len = s - dev->bus_id; |
| 165 | |
| 166 | if (!strncmp(dev->bus_id, map->bus_id, len)) { |
| 167 | pdev = container_of(dev, struct platform_device, dev); |
| 168 | map->rtn(pdev, idx); |
| 169 | } |
| 170 | map++; |
| 171 | } |
| 172 | } |
| 173 | |
| 174 | /* |
| 175 | Function assignment stuff. |
| 176 | Intended to work as follows: |
| 177 | the device name defined in foo_devices.c will be concatenated with :"func", |
| 178 | where func is string map of respective function from platfom_device_func enum |
| 179 | |
| 180 | The PPC_SYS_FUNC_DUMMY function is intended to remove all assignments, making the device to appear |
| 181 | in platform bus with unmodified name. |
| 182 | */ |
| 183 | |
| 184 | /* |
| 185 | Here we'll replace .name pointers with fixed-lenght strings |
| 186 | Hereby, this should be called *before* any func stuff triggeded. |
| 187 | */ |
| 188 | void ppc_sys_device_initfunc(void) |
| 189 | { |
| 190 | int i; |
| 191 | const char *name; |
| 192 | static char new_names[NUM_PPC_SYS_DEVS][BUS_ID_SIZE]; |
| 193 | enum ppc_sys_devices cur_dev; |
| 194 | |
| 195 | /* If inited yet, do nothing */ |
| 196 | if (ppc_sys_func_inited) |
| 197 | return; |
| 198 | |
| 199 | for (i = 0; i < cur_ppc_sys_spec->num_devices; i++) { |
| 200 | if ((cur_dev = cur_ppc_sys_spec->device_list[i]) < 0) |
| 201 | continue; |
| 202 | |
| 203 | if (ppc_sys_platform_devices[cur_dev].name) { |
| 204 | /*backup name */ |
| 205 | name = ppc_sys_platform_devices[cur_dev].name; |
| 206 | strlcpy(new_names[i], name, BUS_ID_SIZE); |
| 207 | ppc_sys_platform_devices[cur_dev].name = new_names[i]; |
| 208 | } |
| 209 | } |
| 210 | |
| 211 | ppc_sys_func_inited = 1; |
| 212 | } |
| 213 | |
| 214 | /*The "engine" of the func stuff. Here we either concat specified function string description |
| 215 | to the name, or remove it if PPC_SYS_FUNC_DUMMY parameter is passed here*/ |
| 216 | void ppc_sys_device_setfunc(enum ppc_sys_devices dev, |
| 217 | enum platform_device_func func) |
| 218 | { |
| 219 | char *s; |
| 220 | char *name = (char *)ppc_sys_platform_devices[dev].name; |
| 221 | char tmp[BUS_ID_SIZE]; |
| 222 | |
| 223 | if (!ppc_sys_func_inited) { |
| 224 | printk(KERN_ERR "Unable to alter function - not inited!\n"); |
| 225 | return; |
| 226 | } |
| 227 | |
| 228 | if (ppc_sys_inited) { |
| 229 | platform_device_unregister(&ppc_sys_platform_devices[dev]); |
| 230 | } |
| 231 | |
| 232 | if ((s = (char *)strchr(name, ':')) != NULL) { /* reassign */ |
| 233 | /* Either change the name after ':' or remove func modifications */ |
| 234 | if (func != PPC_SYS_FUNC_DUMMY) |
| 235 | strlcpy(s + 1, ppc_sys_func_names[func], BUS_ID_SIZE); |
| 236 | else |
| 237 | *s = 0; |
| 238 | } else if (func != PPC_SYS_FUNC_DUMMY) { |
| 239 | /* do assignment if it is not just "clear" request */ |
| 240 | sprintf(tmp, "%s:%s", name, ppc_sys_func_names[func]); |
| 241 | strlcpy(name, tmp, BUS_ID_SIZE); |
| 242 | } |
| 243 | |
| 244 | if (ppc_sys_inited) { |
| 245 | platform_device_register(&ppc_sys_platform_devices[dev]); |
| 246 | } |
| 247 | } |
| 248 | |
| 249 | void ppc_sys_device_disable(enum ppc_sys_devices dev) |
| 250 | { |
| 251 | BUG_ON(cur_ppc_sys_spec == NULL); |
| 252 | |
| 253 | /*Check if it is enabled*/ |
| 254 | if(!(cur_ppc_sys_spec->config[dev] & PPC_SYS_CONFIG_DISABLED)) { |
| 255 | if (ppc_sys_inited) { |
| 256 | platform_device_unregister(&ppc_sys_platform_devices[dev]); |
| 257 | } |
| 258 | cur_ppc_sys_spec->config[dev] |= PPC_SYS_CONFIG_DISABLED; |
| 259 | } |
| 260 | } |
| 261 | |
| 262 | void ppc_sys_device_enable(enum ppc_sys_devices dev) |
| 263 | { |
| 264 | BUG_ON(cur_ppc_sys_spec == NULL); |
| 265 | |
| 266 | /*Check if it is disabled*/ |
| 267 | if(cur_ppc_sys_spec->config[dev] & PPC_SYS_CONFIG_DISABLED) { |
| 268 | if (ppc_sys_inited) { |
| 269 | platform_device_register(&ppc_sys_platform_devices[dev]); |
| 270 | } |
| 271 | cur_ppc_sys_spec->config[dev] &= ~PPC_SYS_CONFIG_DISABLED; |
| 272 | } |
| 273 | |
| 274 | } |
| 275 | |
| 276 | void ppc_sys_device_enable_all(void) |
| 277 | { |
| 278 | enum ppc_sys_devices cur_dev; |
| 279 | int i; |
| 280 | |
| 281 | for (i = 0; i < cur_ppc_sys_spec->num_devices; i++) { |
| 282 | cur_dev = cur_ppc_sys_spec->device_list[i]; |
| 283 | ppc_sys_device_enable(cur_dev); |
| 284 | } |
| 285 | } |
| 286 | |
| 287 | void ppc_sys_device_disable_all(void) |
| 288 | { |
| 289 | enum ppc_sys_devices cur_dev; |
| 290 | int i; |
| 291 | |
| 292 | for (i = 0; i < cur_ppc_sys_spec->num_devices; i++) { |
| 293 | cur_dev = cur_ppc_sys_spec->device_list[i]; |
| 294 | ppc_sys_device_disable(cur_dev); |
| 295 | } |
| 296 | } |
| 297 | |
| 298 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 299 | static int __init ppc_sys_init(void) |
| 300 | { |
| 301 | unsigned int i, dev_id, ret = 0; |
| 302 | |
| 303 | BUG_ON(cur_ppc_sys_spec == NULL); |
| 304 | |
| 305 | for (i = 0; i < cur_ppc_sys_spec->num_devices; i++) { |
| 306 | dev_id = cur_ppc_sys_spec->device_list[i]; |
Vitaly Bordug | 75288c7 | 2006-01-20 22:22:34 +0300 | [diff] [blame] | 307 | if ((dev_id != -1) && |
| 308 | !(cur_ppc_sys_spec->config[dev_id] & PPC_SYS_CONFIG_DISABLED)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 309 | if (ppc_sys_device_fixup != NULL) |
| 310 | ppc_sys_device_fixup(&ppc_sys_platform_devices |
| 311 | [dev_id]); |
| 312 | if (platform_device_register |
| 313 | (&ppc_sys_platform_devices[dev_id])) { |
| 314 | ret = 1; |
| 315 | printk(KERN_ERR |
| 316 | "unable to register device %d\n", |
| 317 | dev_id); |
| 318 | } |
| 319 | } |
| 320 | } |
| 321 | |
| 322 | ppc_sys_inited = 1; |
| 323 | return ret; |
| 324 | } |
| 325 | |
| 326 | subsys_initcall(ppc_sys_init); |