Lina Iyer | 1c5ab79 | 2017-02-01 13:34:54 -0700 | [diff] [blame] | 1 | /* Copyright (c) 2016-2017, The Linux Foundation. All rights reserved. |
Mahesh Sivasubramanian | cb64952 | 2016-08-19 14:04:44 -0600 | [diff] [blame] | 2 | * |
| 3 | * This program is free software; you can redistribute it and/or modify |
| 4 | * it under the terms of the GNU General Public License version 2 and |
| 5 | * only version 2 as published by the Free Software Foundation. |
| 6 | * |
| 7 | * This program is distributed in the hope that it will be useful, |
| 8 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 9 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 10 | * GNU General Public License for more details. |
| 11 | */ |
| 12 | |
| 13 | #include <linux/module.h> |
| 14 | #include <linux/types.h> |
| 15 | #include <linux/platform_device.h> |
| 16 | #include <linux/slab.h> |
| 17 | #include <linux/io.h> |
| 18 | #include <linux/of.h> |
| 19 | #include <linux/of_address.h> |
| 20 | #include <linux/of_platform.h> |
| 21 | #include <linux/kernel.h> |
Mahesh Sivasubramanian | c44e380 | 2017-04-28 09:56:01 -0600 | [diff] [blame] | 22 | #include <linux/debugfs.h> |
| 23 | #include <linux/fs.h> |
| 24 | #include <linux/seq_file.h> |
Mahesh Sivasubramanian | cb64952 | 2016-08-19 14:04:44 -0600 | [diff] [blame] | 25 | #include <soc/qcom/cmd-db.h> |
| 26 | |
| 27 | #define RESOURCE_ID_LEN 8 |
| 28 | #define NUM_PRIORITY 2 |
| 29 | #define MAX_SLV_ID 8 |
| 30 | #define CMD_DB_MAGIC 0x0C0330DBUL |
| 31 | #define SLAVE_ID_MASK 0x7 |
| 32 | #define SLAVE_ID_SHIFT 16 |
Lina Iyer | 1c5ab79 | 2017-02-01 13:34:54 -0700 | [diff] [blame] | 33 | #define CMD_DB_STANDALONE_MASK BIT(0) |
Mahesh Sivasubramanian | cb64952 | 2016-08-19 14:04:44 -0600 | [diff] [blame] | 34 | |
| 35 | struct entry_header { |
| 36 | uint64_t res_id; |
| 37 | u32 priority[NUM_PRIORITY]; |
| 38 | u32 addr; |
| 39 | u16 len; |
| 40 | u16 offset; |
| 41 | }; |
| 42 | |
| 43 | struct rsc_hdr { |
| 44 | u16 slv_id; |
| 45 | u16 header_offset; /* Entry header offset from data */ |
| 46 | u16 data_offset; /* Entry offset for data location */ |
| 47 | u16 cnt; /* Number of entries for HW type */ |
| 48 | u16 version; /* MSB is Major and LSB is Minor version |
| 49 | * identifies the HW type of Aux Data |
| 50 | */ |
| 51 | u16 reserved[3]; |
| 52 | }; |
| 53 | |
| 54 | struct cmd_db_header { |
| 55 | u32 version; |
| 56 | u32 magic_num; |
| 57 | struct rsc_hdr header[MAX_SLV_ID]; |
| 58 | u32 check_sum; |
| 59 | u32 reserved; |
| 60 | u8 data[]; |
| 61 | }; |
| 62 | |
| 63 | struct cmd_db_entry { |
| 64 | const char resource_id[RESOURCE_ID_LEN + 1]; /* Unique id per entry */ |
| 65 | const u32 addr; /* TCS Addr Slave ID + Offset address */ |
| 66 | const u32 priority[NUM_PRIORITY]; /* Bitmask for DRV IDs */ |
| 67 | u32 len; /* Aux data len */ |
| 68 | u16 version; |
| 69 | u8 data[]; |
| 70 | }; |
| 71 | |
| 72 | /* CMD DB QUERY TYPES */ |
| 73 | enum cmd_db_query_type { |
| 74 | CMD_DB_QUERY_RES_ID = 0, |
| 75 | CMD_DB_QUERY_ADDRESS, |
| 76 | CMD_DB_QUERY_INVALID, |
| 77 | CMD_DB_QUERY_MAX = 0x7ffffff, |
| 78 | }; |
| 79 | |
| 80 | static void __iomem *start_addr; |
| 81 | static struct cmd_db_header *cmd_db_header; |
| 82 | static int cmd_db_status = -EPROBE_DEFER; |
| 83 | |
| 84 | static u64 cmd_db_get_u64_id(const char *id) |
| 85 | { |
| 86 | uint64_t rsc_id = 0; |
| 87 | uint8_t *ch = (uint8_t *)&rsc_id; |
| 88 | int i; |
| 89 | |
| 90 | for (i = 0; ((i < sizeof(rsc_id)) && id[i]); i++) |
| 91 | ch[i] = id[i]; |
| 92 | |
| 93 | return rsc_id; |
| 94 | } |
| 95 | |
| 96 | static int cmd_db_get_header(u64 query, struct entry_header *eh, |
| 97 | struct rsc_hdr *rh, bool use_addr) |
| 98 | { |
| 99 | struct rsc_hdr *rsc_hdr; |
| 100 | int i, j; |
| 101 | |
| 102 | if (!cmd_db_header) |
| 103 | return -EPROBE_DEFER; |
| 104 | |
| 105 | if (!eh || !rh) |
| 106 | return -EINVAL; |
| 107 | |
| 108 | rsc_hdr = &cmd_db_header->header[0]; |
| 109 | |
| 110 | for (i = 0; i < MAX_SLV_ID ; i++, rsc_hdr++) { |
| 111 | struct entry_header *ent; |
| 112 | |
| 113 | if (!rsc_hdr->slv_id) |
| 114 | break; |
| 115 | |
| 116 | ent = (struct entry_header *)(start_addr |
| 117 | + sizeof(*cmd_db_header) |
| 118 | + rsc_hdr->header_offset); |
| 119 | |
| 120 | for (j = 0; j < rsc_hdr->cnt; j++, ent++) { |
| 121 | if (use_addr) { |
| 122 | if (ent->addr == (u32)(query)) |
| 123 | break; |
| 124 | } else if (ent->res_id == query) |
| 125 | break; |
| 126 | } |
| 127 | |
| 128 | if (j < rsc_hdr->cnt) { |
| 129 | memcpy(eh, ent, sizeof(*ent)); |
| 130 | memcpy(rh, &cmd_db_header->header[i], sizeof(*rh)); |
| 131 | return 0; |
| 132 | } |
| 133 | } |
| 134 | return -ENODEV; |
| 135 | } |
| 136 | |
| 137 | static int cmd_db_get_header_by_addr(u32 addr, |
| 138 | struct entry_header *ent_hdr, |
| 139 | struct rsc_hdr *rsc_hdr) |
| 140 | { |
| 141 | return cmd_db_get_header((u64)addr, ent_hdr, rsc_hdr, true); |
| 142 | } |
| 143 | |
| 144 | static int cmd_db_get_header_by_rsc_id(const char *resource_id, |
| 145 | struct entry_header *ent_hdr, |
| 146 | struct rsc_hdr *rsc_hdr) |
| 147 | { |
| 148 | u64 rsc_id = cmd_db_get_u64_id(resource_id); |
| 149 | |
| 150 | return cmd_db_get_header(rsc_id, ent_hdr, rsc_hdr, false); |
| 151 | } |
| 152 | |
| 153 | u32 cmd_db_get_addr(const char *resource_id) |
| 154 | { |
| 155 | int ret; |
| 156 | struct entry_header ent; |
| 157 | struct rsc_hdr rsc_hdr; |
| 158 | |
| 159 | ret = cmd_db_get_header_by_rsc_id(resource_id, &ent, &rsc_hdr); |
| 160 | |
| 161 | return ret < 0 ? 0 : ent.addr; |
| 162 | } |
| 163 | |
| 164 | bool cmd_db_get_priority(u32 addr, u8 drv_id) |
| 165 | { |
| 166 | int ret; |
| 167 | struct entry_header ent; |
| 168 | struct rsc_hdr rsc_hdr; |
| 169 | |
| 170 | ret = cmd_db_get_header_by_addr(addr, &ent, &rsc_hdr); |
| 171 | |
| 172 | return ret < 0 ? false : (bool)(ent.priority[0] & (1 << drv_id)); |
| 173 | |
| 174 | } |
| 175 | int cmd_db_get_aux_data(const char *resource_id, u8 *data, int len) |
| 176 | { |
| 177 | int ret; |
| 178 | struct entry_header ent; |
| 179 | struct rsc_hdr rsc_hdr; |
| 180 | |
| 181 | if (!data) |
| 182 | return -EINVAL; |
| 183 | |
| 184 | ret = cmd_db_get_header_by_rsc_id(resource_id, &ent, &rsc_hdr); |
| 185 | |
| 186 | if (ret) |
| 187 | return ret; |
| 188 | |
| 189 | if (ent.len < len) |
| 190 | return -EINVAL; |
| 191 | |
| 192 | len = (ent.len < len) ? ent.len : len; |
| 193 | |
| 194 | memcpy_fromio(data, |
| 195 | start_addr + sizeof(*cmd_db_header) |
| 196 | + rsc_hdr.data_offset + ent.offset, |
| 197 | len); |
| 198 | return len; |
| 199 | } |
| 200 | |
| 201 | int cmd_db_get_aux_data_len(const char *resource_id) |
| 202 | { |
| 203 | int ret; |
| 204 | struct entry_header ent; |
| 205 | struct rsc_hdr rsc_hdr; |
| 206 | |
| 207 | ret = cmd_db_get_header_by_rsc_id(resource_id, &ent, &rsc_hdr); |
| 208 | |
| 209 | return ret < 0 ? 0 : ent.len; |
| 210 | } |
| 211 | |
| 212 | u16 cmd_db_get_version(const char *resource_id) |
| 213 | { |
| 214 | int ret; |
| 215 | struct entry_header ent; |
| 216 | struct rsc_hdr rsc_hdr; |
| 217 | |
| 218 | ret = cmd_db_get_header_by_rsc_id(resource_id, &ent, &rsc_hdr); |
| 219 | return ret < 0 ? 0 : rsc_hdr.version; |
| 220 | } |
| 221 | |
| 222 | int cmd_db_ready(void) |
| 223 | { |
| 224 | return cmd_db_status; |
| 225 | } |
| 226 | |
Lina Iyer | 1c5ab79 | 2017-02-01 13:34:54 -0700 | [diff] [blame] | 227 | int cmd_db_is_standalone(void) |
| 228 | { |
| 229 | if (cmd_db_status < 0) |
| 230 | return cmd_db_status; |
| 231 | |
| 232 | return !!(cmd_db_header->reserved & CMD_DB_STANDALONE_MASK); |
| 233 | } |
| 234 | |
Mahesh Sivasubramanian | cb64952 | 2016-08-19 14:04:44 -0600 | [diff] [blame] | 235 | int cmd_db_get_slave_id(const char *resource_id) |
| 236 | { |
| 237 | int ret; |
| 238 | struct entry_header ent; |
| 239 | struct rsc_hdr rsc_hdr; |
| 240 | |
| 241 | ret = cmd_db_get_header_by_rsc_id(resource_id, &ent, &rsc_hdr); |
| 242 | return ret < 0 ? 0 : (ent.addr >> SLAVE_ID_SHIFT) & SLAVE_ID_MASK; |
| 243 | } |
| 244 | |
Mahesh Sivasubramanian | c44e380 | 2017-04-28 09:56:01 -0600 | [diff] [blame] | 245 | static void *cmd_db_start(struct seq_file *m, loff_t *pos) |
| 246 | { |
| 247 | struct cmd_db_header *hdr = m->private; |
| 248 | int slv_idx, ent_idx; |
| 249 | struct entry_header *ent; |
| 250 | int total = 0; |
| 251 | |
| 252 | for (slv_idx = 0; slv_idx < MAX_SLV_ID; slv_idx++) { |
| 253 | |
| 254 | if (!hdr->header[slv_idx].cnt) |
| 255 | continue; |
| 256 | ent_idx = *pos - total; |
| 257 | if (ent_idx < hdr->header[slv_idx].cnt) |
| 258 | break; |
| 259 | |
| 260 | total += hdr->header[slv_idx].cnt; |
| 261 | } |
| 262 | |
| 263 | if (slv_idx == MAX_SLV_ID) |
| 264 | return NULL; |
| 265 | |
| 266 | ent = start_addr + hdr->header[slv_idx].header_offset + sizeof(*hdr); |
| 267 | return &ent[ent_idx]; |
| 268 | |
| 269 | } |
| 270 | |
| 271 | static void cmd_db_stop(struct seq_file *m, void *v) |
| 272 | { |
| 273 | } |
| 274 | |
| 275 | static void *cmd_db_next(struct seq_file *m, void *v, loff_t *pos) |
| 276 | { |
| 277 | (*pos)++; |
| 278 | return cmd_db_start(m, pos); |
| 279 | } |
| 280 | |
| 281 | static int cmd_db_seq_show(struct seq_file *m, void *v) |
| 282 | { |
| 283 | struct entry_header *eh = v; |
| 284 | struct cmd_db_header *hdr = m->private; |
| 285 | char buf[9] = {0}; |
| 286 | |
| 287 | if (!eh) |
| 288 | return 0; |
| 289 | |
| 290 | memcpy(buf, &eh->res_id, min(sizeof(eh->res_id), sizeof(buf))); |
| 291 | |
| 292 | seq_printf(m, "Address: 0x%05x, id: %s", eh->addr, buf); |
| 293 | |
| 294 | if (eh->len) { |
| 295 | int slv_id = (eh->addr >> SLAVE_ID_SHIFT) & SLAVE_ID_MASK; |
| 296 | u8 aux[32] = {0}; |
| 297 | int len; |
| 298 | int k; |
| 299 | |
| 300 | len = min_t(u32, eh->len, sizeof(aux)); |
| 301 | |
| 302 | for (k = 0; k < MAX_SLV_ID; k++) { |
| 303 | if (hdr->header[k].slv_id == slv_id) |
| 304 | break; |
| 305 | } |
| 306 | |
| 307 | if (k == MAX_SLV_ID) |
| 308 | return -EINVAL; |
| 309 | |
| 310 | memcpy_fromio(aux, start_addr + hdr->header[k].data_offset |
| 311 | + eh->offset + sizeof(*cmd_db_header), len); |
| 312 | |
| 313 | seq_puts(m, ", aux data: "); |
| 314 | |
| 315 | for (k = 0; k < len; k++) |
| 316 | seq_printf(m, "%02x ", aux[k]); |
| 317 | |
| 318 | } |
| 319 | seq_puts(m, "\n"); |
| 320 | return 0; |
| 321 | } |
| 322 | |
| 323 | static const struct seq_operations cmd_db_seq_ops = { |
| 324 | .start = cmd_db_start, |
| 325 | .stop = cmd_db_stop, |
| 326 | .next = cmd_db_next, |
| 327 | .show = cmd_db_seq_show, |
| 328 | }; |
| 329 | |
| 330 | static int cmd_db_file_open(struct inode *inode, struct file *file) |
| 331 | { |
| 332 | int ret = seq_open(file, &cmd_db_seq_ops); |
| 333 | struct seq_file *s = (struct seq_file *)(file->private_data); |
| 334 | |
| 335 | s->private = inode->i_private; |
| 336 | return ret; |
| 337 | } |
| 338 | |
| 339 | static const struct file_operations cmd_db_fops = { |
| 340 | .owner = THIS_MODULE, |
| 341 | .open = cmd_db_file_open, |
| 342 | .read = seq_read, |
| 343 | .release = seq_release, |
| 344 | .llseek = no_llseek, |
| 345 | }; |
| 346 | |
Mahesh Sivasubramanian | cb64952 | 2016-08-19 14:04:44 -0600 | [diff] [blame] | 347 | static int cmd_db_dev_probe(struct platform_device *pdev) |
| 348 | { |
Mahesh Sivasubramanian | d65a35e | 2017-04-28 11:18:13 -0600 | [diff] [blame] | 349 | struct resource res; |
| 350 | void __iomem *dict; |
Mahesh Sivasubramanian | cb64952 | 2016-08-19 14:04:44 -0600 | [diff] [blame] | 351 | |
Mahesh Sivasubramanian | d65a35e | 2017-04-28 11:18:13 -0600 | [diff] [blame] | 352 | dict = of_iomap(pdev->dev.of_node, 0); |
| 353 | if (!dict) { |
Mahesh Sivasubramanian | cb64952 | 2016-08-19 14:04:44 -0600 | [diff] [blame] | 354 | cmd_db_status = -ENOMEM; |
| 355 | goto failed; |
| 356 | } |
| 357 | |
Mahesh Sivasubramanian | d65a35e | 2017-04-28 11:18:13 -0600 | [diff] [blame] | 358 | /* |
| 359 | * Read start address and size of the command DB address from |
| 360 | * shared dictionary location |
| 361 | */ |
| 362 | res.start = readl_relaxed(dict); |
| 363 | res.end = res.start + readl_relaxed(dict + 0x4); |
| 364 | res.flags = IORESOURCE_MEM; |
| 365 | iounmap(dict); |
Mahesh Sivasubramanian | cb64952 | 2016-08-19 14:04:44 -0600 | [diff] [blame] | 366 | |
Mahesh Sivasubramanian | d65a35e | 2017-04-28 11:18:13 -0600 | [diff] [blame] | 367 | start_addr = devm_ioremap_resource(&pdev->dev, &res); |
| 368 | |
| 369 | cmd_db_header = devm_kzalloc(&pdev->dev, |
| 370 | sizeof(*cmd_db_header), GFP_KERNEL); |
Mahesh Sivasubramanian | cb64952 | 2016-08-19 14:04:44 -0600 | [diff] [blame] | 371 | |
| 372 | if (!cmd_db_header) { |
| 373 | cmd_db_status = -ENOMEM; |
| 374 | goto failed; |
| 375 | } |
| 376 | |
| 377 | memcpy(cmd_db_header, start_addr, sizeof(*cmd_db_header)); |
| 378 | |
| 379 | if (cmd_db_header->magic_num != CMD_DB_MAGIC) { |
| 380 | pr_err("%s(): Invalid Magic\n", __func__); |
| 381 | cmd_db_status = -EINVAL; |
| 382 | goto failed; |
| 383 | } |
| 384 | cmd_db_status = 0; |
| 385 | of_platform_populate(pdev->dev.of_node, NULL, NULL, &pdev->dev); |
Lina Iyer | 1c5ab79 | 2017-02-01 13:34:54 -0700 | [diff] [blame] | 386 | |
Mahesh Sivasubramanian | c44e380 | 2017-04-28 09:56:01 -0600 | [diff] [blame] | 387 | if (!debugfs_create_file("cmd_db", 0444, NULL, |
| 388 | cmd_db_header, &cmd_db_fops)) |
| 389 | pr_err("Couldn't create debugfs\n"); |
| 390 | |
Lina Iyer | 1c5ab79 | 2017-02-01 13:34:54 -0700 | [diff] [blame] | 391 | if (cmd_db_is_standalone() == 1) |
| 392 | pr_info("Command DB is initialized in standalone mode.\n"); |
| 393 | |
Mahesh Sivasubramanian | cb64952 | 2016-08-19 14:04:44 -0600 | [diff] [blame] | 394 | failed: |
| 395 | return cmd_db_status; |
| 396 | } |
| 397 | |
| 398 | static const struct of_device_id cmd_db_match_table[] = { |
| 399 | {.compatible = "qcom,cmd-db"}, |
| 400 | {}, |
| 401 | }; |
| 402 | |
| 403 | static struct platform_driver cmd_db_dev_driver = { |
| 404 | .probe = cmd_db_dev_probe, |
| 405 | .driver = { |
| 406 | .name = "cmd-db", |
| 407 | .owner = THIS_MODULE, |
| 408 | .of_match_table = cmd_db_match_table, |
| 409 | }, |
| 410 | }; |
| 411 | |
| 412 | int __init cmd_db_device_init(void) |
| 413 | { |
| 414 | return platform_driver_register(&cmd_db_dev_driver); |
| 415 | } |
| 416 | arch_initcall(cmd_db_device_init); |