Mao Jinlong | 99337ac | 2018-04-09 14:36:26 +0800 | [diff] [blame] | 1 | /* Copyright (c) 2015-2018, The Linux Foundation. All rights reserved. |
Satyajit Desai | 765e7ef | 2016-11-09 14:27:45 -0800 | [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 | #include <linux/module.h> |
| 13 | #include <linux/bitops.h> |
| 14 | #include <linux/cdev.h> |
| 15 | #include <linux/delay.h> |
| 16 | #include <linux/io.h> |
| 17 | #include <linux/iopoll.h> |
| 18 | #include <linux/fs.h> |
| 19 | #include <linux/of.h> |
| 20 | #include <linux/platform_device.h> |
| 21 | #include <linux/slab.h> |
| 22 | #include <linux/uaccess.h> |
| 23 | #include <soc/qcom/memory_dump.h> |
| 24 | #include <soc/qcom/scm.h> |
Satyajit Desai | af71a5a | 2017-09-29 14:30:43 -0700 | [diff] [blame] | 25 | #include <dt-bindings/soc/qcom,dcc_v2.h> |
Satyajit Desai | 765e7ef | 2016-11-09 14:27:45 -0800 | [diff] [blame] | 26 | |
| 27 | #define TIMEOUT_US (100) |
| 28 | |
| 29 | #define BM(lsb, msb) ((BIT(msb) - BIT(lsb)) + BIT(msb)) |
| 30 | #define BMVAL(val, lsb, msb) ((val & BM(lsb, msb)) >> lsb) |
| 31 | #define BVAL(val, n) ((val & BIT(n)) >> n) |
| 32 | |
| 33 | #define dcc_writel(drvdata, val, off) \ |
| 34 | __raw_writel((val), drvdata->base + off) |
| 35 | #define dcc_readl(drvdata, off) \ |
| 36 | __raw_readl(drvdata->base + off) |
| 37 | |
| 38 | #define dcc_sram_writel(drvdata, val, off) \ |
| 39 | __raw_writel((val), drvdata->ram_base + off) |
| 40 | #define dcc_sram_readl(drvdata, off) \ |
| 41 | __raw_readl(drvdata->ram_base + off) |
| 42 | |
| 43 | #define HLOS_LIST_START 1 |
| 44 | |
| 45 | /* DCC registers */ |
| 46 | #define DCC_HW_VERSION (0x00) |
| 47 | #define DCC_HW_INFO (0x04) |
| 48 | #define DCC_EXEC_CTRL (0x08) |
| 49 | #define DCC_STATUS (0x0C) |
| 50 | #define DCC_CFG (0x10) |
| 51 | #define DCC_FDA_CURR (0x14) |
| 52 | #define DCC_LLA_CURR (0x18) |
| 53 | #define DCC_LL_LOCK(m) (0x1C + 0x80 * (m + HLOS_LIST_START)) |
| 54 | #define DCC_LL_CFG(m) (0x20 + 0x80 * (m + HLOS_LIST_START)) |
| 55 | #define DCC_LL_BASE(m) (0x24 + 0x80 * (m + HLOS_LIST_START)) |
| 56 | #define DCC_FD_BASE(m) (0x28 + 0x80 * (m + HLOS_LIST_START)) |
| 57 | #define DCC_LL_TIMEOUT(m) (0x2c + 0x80 * (m + HLOS_LIST_START)) |
| 58 | #define DCC_LL_INT_ENABLE(m) (0x30 + 0x80 * (m + HLOS_LIST_START)) |
| 59 | #define DCC_LL_INT_STATUS(m) (0x34 + 0x80 * (m + HLOS_LIST_START)) |
| 60 | #define DCC_FDA_CAPTURED(m) (0x38 + 0x80 * (m + HLOS_LIST_START)) |
| 61 | #define DCC_LLA_CAPTURED(m) (0x3C + 0x80 * (m + HLOS_LIST_START)) |
| 62 | #define DCC_LL_CRC_CAPTURED(m) (0x40 + 0x80 * (m + HLOS_LIST_START)) |
| 63 | #define DCC_LL_SW_TRIGGER(m) (0x44 + 0x80 * (m + HLOS_LIST_START)) |
| 64 | #define DCC_LL_BUS_ACCESS_STATUS(m) (0x48 + 0x80 * (m + HLOS_LIST_START)) |
| 65 | |
| 66 | #define DCC_REG_DUMP_MAGIC_V2 (0x42445953) |
| 67 | #define DCC_REG_DUMP_VER (1) |
| 68 | |
| 69 | #define MAX_DCC_OFFSET (0xFF * 4) |
| 70 | #define MAX_DCC_LEN 0x7F |
| 71 | #define MAX_LOOP_CNT 0xFF |
| 72 | |
| 73 | #define DCC_ADDR_DESCRIPTOR 0x00 |
| 74 | #define DCC_LOOP_DESCRIPTOR (BIT(30)) |
| 75 | #define DCC_RD_MOD_WR_DESCRIPTOR (BIT(31)) |
| 76 | #define DCC_LINK_DESCRIPTOR (BIT(31) | BIT(30)) |
| 77 | |
Satyajit Desai | 3307362 | 2017-04-17 16:45:06 -0700 | [diff] [blame] | 78 | #define DCC_READ_IND 0x00 |
| 79 | #define DCC_WRITE_IND (BIT(28)) |
| 80 | |
Satyajit Desai | e95613c | 2017-05-01 17:04:47 -0700 | [diff] [blame] | 81 | #define DCC_AHB_IND 0x00 |
| 82 | #define DCC_APB_IND BIT(29) |
| 83 | |
Satyajit Desai | 765e7ef | 2016-11-09 14:27:45 -0800 | [diff] [blame] | 84 | #define DCC_MAX_LINK_LIST 5 |
| 85 | #define DCC_INVALID_LINK_LIST 0xFF |
| 86 | |
| 87 | enum dcc_func_type { |
| 88 | DCC_FUNC_TYPE_CAPTURE, |
| 89 | DCC_FUNC_TYPE_CRC, |
| 90 | }; |
| 91 | |
| 92 | static const char * const str_dcc_func_type[] = { |
| 93 | [DCC_FUNC_TYPE_CAPTURE] = "cap", |
| 94 | [DCC_FUNC_TYPE_CRC] = "crc", |
| 95 | }; |
| 96 | |
| 97 | enum dcc_data_sink { |
| 98 | DCC_DATA_SINK_SRAM, |
| 99 | DCC_DATA_SINK_ATB |
| 100 | }; |
| 101 | |
Satyajit Desai | 3307362 | 2017-04-17 16:45:06 -0700 | [diff] [blame] | 102 | enum dcc_descriptor_type { |
| 103 | DCC_ADDR_TYPE, |
| 104 | DCC_LOOP_TYPE, |
| 105 | DCC_READ_WRITE_TYPE, |
| 106 | DCC_WRITE_TYPE |
| 107 | }; |
| 108 | |
Satyajit Desai | 765e7ef | 2016-11-09 14:27:45 -0800 | [diff] [blame] | 109 | static const char * const str_dcc_data_sink[] = { |
| 110 | [DCC_DATA_SINK_SRAM] = "sram", |
| 111 | [DCC_DATA_SINK_ATB] = "atb", |
| 112 | }; |
| 113 | |
| 114 | struct rpm_trig_req { |
| 115 | uint32_t enable; |
| 116 | uint32_t reserved; |
| 117 | }; |
| 118 | |
| 119 | struct dcc_config_entry { |
Satyajit Desai | 3307362 | 2017-04-17 16:45:06 -0700 | [diff] [blame] | 120 | uint32_t base; |
| 121 | uint32_t offset; |
| 122 | uint32_t len; |
| 123 | uint32_t index; |
| 124 | uint32_t loop_cnt; |
| 125 | uint32_t write_val; |
| 126 | uint32_t mask; |
Satyajit Desai | e95613c | 2017-05-01 17:04:47 -0700 | [diff] [blame] | 127 | bool apb_bus; |
Satyajit Desai | 3307362 | 2017-04-17 16:45:06 -0700 | [diff] [blame] | 128 | enum dcc_descriptor_type desc_type; |
| 129 | struct list_head list; |
Satyajit Desai | 765e7ef | 2016-11-09 14:27:45 -0800 | [diff] [blame] | 130 | }; |
| 131 | |
| 132 | struct dcc_drvdata { |
| 133 | void __iomem *base; |
| 134 | uint32_t reg_size; |
| 135 | struct device *dev; |
| 136 | struct mutex mutex; |
| 137 | void __iomem *ram_base; |
| 138 | uint32_t ram_size; |
Satyajit Desai | 3d86e1b | 2017-04-13 17:11:09 -0700 | [diff] [blame] | 139 | uint32_t ram_offset; |
Satyajit Desai | 765e7ef | 2016-11-09 14:27:45 -0800 | [diff] [blame] | 140 | enum dcc_data_sink data_sink; |
| 141 | enum dcc_func_type func_type[DCC_MAX_LINK_LIST]; |
| 142 | uint32_t ram_cfg; |
| 143 | uint32_t ram_start; |
| 144 | bool enable[DCC_MAX_LINK_LIST]; |
| 145 | bool configured[DCC_MAX_LINK_LIST]; |
| 146 | bool interrupt_disable; |
| 147 | char *sram_node; |
| 148 | struct cdev sram_dev; |
| 149 | struct class *sram_class; |
| 150 | struct list_head cfg_head[DCC_MAX_LINK_LIST]; |
| 151 | uint32_t nr_config[DCC_MAX_LINK_LIST]; |
Satyajit Desai | 765e7ef | 2016-11-09 14:27:45 -0800 | [diff] [blame] | 152 | uint8_t curr_list; |
Satyajit Desai | fe1311b | 2017-05-19 16:02:35 -0700 | [diff] [blame] | 153 | uint8_t cti_trig; |
Satyajit Desai | 765e7ef | 2016-11-09 14:27:45 -0800 | [diff] [blame] | 154 | }; |
| 155 | |
| 156 | static bool dcc_ready(struct dcc_drvdata *drvdata) |
| 157 | { |
| 158 | uint32_t val; |
| 159 | |
| 160 | /* poll until DCC ready */ |
| 161 | if (!readl_poll_timeout((drvdata->base + DCC_STATUS), val, |
| 162 | (BMVAL(val, 0, 1) == 0), 1, TIMEOUT_US)) |
| 163 | return true; |
| 164 | |
| 165 | return false; |
| 166 | } |
| 167 | |
| 168 | static int dcc_read_status(struct dcc_drvdata *drvdata) |
| 169 | { |
| 170 | int curr_list; |
| 171 | uint32_t bus_status; |
| 172 | |
| 173 | for (curr_list = 0; curr_list < DCC_MAX_LINK_LIST; curr_list++) { |
| 174 | if (!drvdata->enable[curr_list]) |
| 175 | continue; |
| 176 | |
| 177 | bus_status = dcc_readl(drvdata, |
| 178 | DCC_LL_BUS_ACCESS_STATUS(curr_list)); |
| 179 | |
| 180 | if (bus_status) { |
| 181 | |
| 182 | dev_err(drvdata->dev, |
| 183 | "Read access error for list %d err: 0x%x", |
| 184 | curr_list, bus_status); |
| 185 | |
| 186 | dcc_writel(drvdata, 0x3, |
| 187 | DCC_LL_BUS_ACCESS_STATUS(curr_list)); |
| 188 | return -ENODATA; |
| 189 | } |
| 190 | } |
| 191 | |
| 192 | return 0; |
| 193 | } |
| 194 | |
| 195 | static int dcc_sw_trigger(struct dcc_drvdata *drvdata) |
| 196 | { |
| 197 | int ret = 0; |
| 198 | int curr_list; |
| 199 | |
| 200 | mutex_lock(&drvdata->mutex); |
| 201 | |
| 202 | if (!dcc_ready(drvdata)) { |
Satyajit Desai | 3307362 | 2017-04-17 16:45:06 -0700 | [diff] [blame] | 203 | dev_err(drvdata->dev, "DCC is not ready\n"); |
Satyajit Desai | 765e7ef | 2016-11-09 14:27:45 -0800 | [diff] [blame] | 204 | ret = -EBUSY; |
| 205 | goto err; |
| 206 | } |
| 207 | |
| 208 | for (curr_list = 0; curr_list < DCC_MAX_LINK_LIST; curr_list++) { |
| 209 | if (!drvdata->enable[curr_list]) |
| 210 | continue; |
| 211 | |
| 212 | dcc_writel(drvdata, 1, DCC_LL_SW_TRIGGER(curr_list)); |
| 213 | } |
| 214 | |
| 215 | if (!dcc_ready(drvdata)) { |
| 216 | dev_err(drvdata->dev, |
| 217 | "DCC is busy after receiving sw tigger.\n"); |
| 218 | ret = -EBUSY; |
| 219 | goto err; |
| 220 | } |
| 221 | |
| 222 | ret = dcc_read_status(drvdata); |
| 223 | |
| 224 | err: |
| 225 | mutex_unlock(&drvdata->mutex); |
| 226 | return ret; |
| 227 | } |
| 228 | |
| 229 | static int __dcc_ll_cfg(struct dcc_drvdata *drvdata, int curr_list) |
| 230 | { |
| 231 | int ret = 0; |
| 232 | uint32_t sram_offset = drvdata->ram_cfg * 4; |
| 233 | uint32_t prev_addr, addr; |
| 234 | uint32_t prev_off = 0, off; |
| 235 | uint32_t loop_off = 0; |
| 236 | uint32_t link; |
| 237 | uint32_t pos, total_len = 0, loop_len = 0; |
Satyajit Desai | 3307362 | 2017-04-17 16:45:06 -0700 | [diff] [blame] | 238 | uint32_t loop, loop_cnt = 0; |
Satyajit Desai | 765e7ef | 2016-11-09 14:27:45 -0800 | [diff] [blame] | 239 | bool loop_start = false; |
| 240 | struct dcc_config_entry *entry; |
| 241 | |
| 242 | prev_addr = 0; |
| 243 | addr = 0; |
| 244 | link = 0; |
| 245 | |
| 246 | list_for_each_entry(entry, &drvdata->cfg_head[curr_list], list) { |
Satyajit Desai | 3307362 | 2017-04-17 16:45:06 -0700 | [diff] [blame] | 247 | switch (entry->desc_type) { |
| 248 | case DCC_READ_WRITE_TYPE: |
| 249 | { |
Satyajit Desai | 765e7ef | 2016-11-09 14:27:45 -0800 | [diff] [blame] | 250 | if (link) { |
| 251 | /* write new offset = 1 to continue |
| 252 | * processing the list |
| 253 | */ |
| 254 | link |= ((0x1 << 8) & BM(8, 14)); |
| 255 | dcc_sram_writel(drvdata, link, sram_offset); |
| 256 | sram_offset += 4; |
| 257 | /* Reset link and prev_off */ |
| 258 | addr = 0x00; |
| 259 | link = 0; |
| 260 | prev_off = 0; |
| 261 | prev_addr = addr; |
| 262 | } |
| 263 | |
| 264 | addr = DCC_RD_MOD_WR_DESCRIPTOR; |
| 265 | dcc_sram_writel(drvdata, addr, sram_offset); |
| 266 | sram_offset += 4; |
| 267 | |
| 268 | dcc_sram_writel(drvdata, entry->mask, sram_offset); |
| 269 | sram_offset += 4; |
| 270 | |
Satyajit Desai | 3307362 | 2017-04-17 16:45:06 -0700 | [diff] [blame] | 271 | dcc_sram_writel(drvdata, entry->write_val, sram_offset); |
Satyajit Desai | 765e7ef | 2016-11-09 14:27:45 -0800 | [diff] [blame] | 272 | sram_offset += 4; |
Satyajit Desai | 3307362 | 2017-04-17 16:45:06 -0700 | [diff] [blame] | 273 | addr = 0; |
| 274 | break; |
Satyajit Desai | 765e7ef | 2016-11-09 14:27:45 -0800 | [diff] [blame] | 275 | } |
| 276 | |
Satyajit Desai | 3307362 | 2017-04-17 16:45:06 -0700 | [diff] [blame] | 277 | case DCC_LOOP_TYPE: |
| 278 | { |
Satyajit Desai | 765e7ef | 2016-11-09 14:27:45 -0800 | [diff] [blame] | 279 | /* Check if we need to write link of prev entry */ |
| 280 | if (link) { |
| 281 | dcc_sram_writel(drvdata, link, sram_offset); |
| 282 | sram_offset += 4; |
| 283 | } |
| 284 | |
| 285 | if (loop_start) { |
| 286 | loop = (sram_offset - loop_off) / 4; |
| 287 | loop |= (loop_cnt << 13) & BM(13, 27); |
| 288 | loop |= DCC_LOOP_DESCRIPTOR; |
| 289 | total_len += (total_len - loop_len) * loop_cnt; |
| 290 | |
| 291 | dcc_sram_writel(drvdata, loop, sram_offset); |
| 292 | sram_offset += 4; |
| 293 | |
| 294 | loop_start = false; |
| 295 | loop_len = 0; |
| 296 | loop_off = 0; |
| 297 | } else { |
| 298 | loop_start = true; |
| 299 | loop_cnt = entry->loop_cnt - 1; |
| 300 | loop_len = total_len; |
| 301 | loop_off = sram_offset; |
| 302 | } |
| 303 | |
| 304 | /* Reset link and prev_off */ |
| 305 | addr = 0x00; |
| 306 | link = 0; |
| 307 | prev_off = 0; |
| 308 | prev_addr = addr; |
| 309 | |
Satyajit Desai | 3307362 | 2017-04-17 16:45:06 -0700 | [diff] [blame] | 310 | break; |
Satyajit Desai | 765e7ef | 2016-11-09 14:27:45 -0800 | [diff] [blame] | 311 | } |
| 312 | |
Satyajit Desai | 3307362 | 2017-04-17 16:45:06 -0700 | [diff] [blame] | 313 | case DCC_WRITE_TYPE: |
| 314 | { |
Satyajit Desai | 765e7ef | 2016-11-09 14:27:45 -0800 | [diff] [blame] | 315 | if (link) { |
Satyajit Desai | 3307362 | 2017-04-17 16:45:06 -0700 | [diff] [blame] | 316 | /* write new offset = 1 to continue |
| 317 | * processing the list |
| 318 | */ |
| 319 | link |= ((0x1 << 8) & BM(8, 14)); |
Satyajit Desai | 765e7ef | 2016-11-09 14:27:45 -0800 | [diff] [blame] | 320 | dcc_sram_writel(drvdata, link, sram_offset); |
| 321 | sram_offset += 4; |
Satyajit Desai | 3307362 | 2017-04-17 16:45:06 -0700 | [diff] [blame] | 322 | /* Reset link and prev_off */ |
| 323 | addr = 0x00; |
| 324 | prev_off = 0; |
| 325 | prev_addr = addr; |
Satyajit Desai | 765e7ef | 2016-11-09 14:27:45 -0800 | [diff] [blame] | 326 | } |
Satyajit Desai | 765e7ef | 2016-11-09 14:27:45 -0800 | [diff] [blame] | 327 | |
Satyajit Desai | 3307362 | 2017-04-17 16:45:06 -0700 | [diff] [blame] | 328 | off = entry->offset/4; |
| 329 | /* write new offset-length pair to correct position */ |
| 330 | link |= ((off & BM(0, 7)) | BIT(15) | |
| 331 | ((entry->len << 8) & BM(8, 14))); |
| 332 | link |= DCC_LINK_DESCRIPTOR; |
| 333 | |
| 334 | /* Address type */ |
| 335 | addr = (entry->base >> 4) & BM(0, 27); |
Satyajit Desai | e95613c | 2017-05-01 17:04:47 -0700 | [diff] [blame] | 336 | if (entry->apb_bus) |
| 337 | addr |= DCC_ADDR_DESCRIPTOR | DCC_WRITE_IND |
| 338 | | DCC_APB_IND; |
| 339 | else |
| 340 | addr |= DCC_ADDR_DESCRIPTOR | DCC_WRITE_IND |
| 341 | | DCC_AHB_IND; |
Satyajit Desai | 3307362 | 2017-04-17 16:45:06 -0700 | [diff] [blame] | 342 | |
Satyajit Desai | 765e7ef | 2016-11-09 14:27:45 -0800 | [diff] [blame] | 343 | dcc_sram_writel(drvdata, addr, sram_offset); |
Satyajit Desai | 3307362 | 2017-04-17 16:45:06 -0700 | [diff] [blame] | 344 | sram_offset += 4; |
Satyajit Desai | 765e7ef | 2016-11-09 14:27:45 -0800 | [diff] [blame] | 345 | |
Satyajit Desai | 765e7ef | 2016-11-09 14:27:45 -0800 | [diff] [blame] | 346 | dcc_sram_writel(drvdata, link, sram_offset); |
Satyajit Desai | 3307362 | 2017-04-17 16:45:06 -0700 | [diff] [blame] | 347 | sram_offset += 4; |
| 348 | |
| 349 | dcc_sram_writel(drvdata, entry->write_val, sram_offset); |
| 350 | sram_offset += 4; |
| 351 | addr = 0x00; |
Satyajit Desai | 765e7ef | 2016-11-09 14:27:45 -0800 | [diff] [blame] | 352 | link = 0; |
Satyajit Desai | 3307362 | 2017-04-17 16:45:06 -0700 | [diff] [blame] | 353 | break; |
Satyajit Desai | 765e7ef | 2016-11-09 14:27:45 -0800 | [diff] [blame] | 354 | } |
| 355 | |
Satyajit Desai | 3307362 | 2017-04-17 16:45:06 -0700 | [diff] [blame] | 356 | default: |
| 357 | { |
| 358 | /* Address type */ |
| 359 | addr = (entry->base >> 4) & BM(0, 27); |
Satyajit Desai | e95613c | 2017-05-01 17:04:47 -0700 | [diff] [blame] | 360 | if (entry->apb_bus) |
| 361 | addr |= DCC_ADDR_DESCRIPTOR | DCC_READ_IND |
| 362 | | DCC_APB_IND; |
| 363 | else |
| 364 | addr |= DCC_ADDR_DESCRIPTOR | DCC_READ_IND |
| 365 | | DCC_AHB_IND; |
Satyajit Desai | 3307362 | 2017-04-17 16:45:06 -0700 | [diff] [blame] | 366 | |
| 367 | off = entry->offset/4; |
| 368 | total_len += entry->len * 4; |
| 369 | |
| 370 | if (!prev_addr || prev_addr != addr || prev_off > off) { |
| 371 | /* Check if we need to write prev link entry */ |
| 372 | if (link) { |
| 373 | dcc_sram_writel(drvdata, |
| 374 | link, sram_offset); |
| 375 | sram_offset += 4; |
| 376 | } |
| 377 | dev_dbg(drvdata->dev, |
| 378 | "DCC: sram address 0x%x\n", |
| 379 | sram_offset); |
| 380 | |
| 381 | /* Write address */ |
| 382 | dcc_sram_writel(drvdata, addr, sram_offset); |
| 383 | sram_offset += 4; |
| 384 | |
| 385 | /* Reset link and prev_off */ |
| 386 | link = 0; |
| 387 | prev_off = 0; |
| 388 | } |
| 389 | |
| 390 | if ((off - prev_off) > 0xFF || |
| 391 | entry->len > MAX_DCC_LEN) { |
| 392 | dev_err(drvdata->dev, |
| 393 | "DCC: Progamming error Base: 0x%x, offset 0x%x\n", |
| 394 | entry->base, entry->offset); |
| 395 | ret = -EINVAL; |
| 396 | goto err; |
| 397 | } |
| 398 | |
| 399 | if (link) { |
| 400 | /* |
| 401 | * link already has one offset-length so new |
| 402 | * offset-length needs to be placed at |
| 403 | * bits [29:15] |
| 404 | */ |
| 405 | pos = 15; |
| 406 | |
| 407 | /* Clear bits [31:16] */ |
| 408 | link &= BM(0, 14); |
| 409 | } else { |
| 410 | /* |
| 411 | * link is empty, so new offset-length needs |
| 412 | * to be placed at bits [15:0] |
| 413 | */ |
| 414 | pos = 0; |
| 415 | link = 1 << 15; |
| 416 | } |
| 417 | |
| 418 | /* write new offset-length pair to correct position */ |
| 419 | link |= (((off-prev_off) & BM(0, 7)) | |
| 420 | ((entry->len << 8) & BM(8, 14))) << pos; |
| 421 | |
| 422 | link |= DCC_LINK_DESCRIPTOR; |
| 423 | |
| 424 | if (pos) { |
| 425 | dcc_sram_writel(drvdata, link, sram_offset); |
| 426 | sram_offset += 4; |
| 427 | link = 0; |
| 428 | } |
| 429 | |
Satyajit Desai | 6d001d5 | 2017-06-16 15:16:16 -0700 | [diff] [blame] | 430 | prev_off = off + entry->len - 1; |
Satyajit Desai | 3307362 | 2017-04-17 16:45:06 -0700 | [diff] [blame] | 431 | prev_addr = addr; |
| 432 | } |
| 433 | } |
Satyajit Desai | 765e7ef | 2016-11-09 14:27:45 -0800 | [diff] [blame] | 434 | } |
| 435 | |
| 436 | if (link) { |
| 437 | dcc_sram_writel(drvdata, link, sram_offset); |
| 438 | sram_offset += 4; |
| 439 | } |
| 440 | |
| 441 | if (loop_start) { |
| 442 | dev_err(drvdata->dev, |
Satyajit Desai | 3307362 | 2017-04-17 16:45:06 -0700 | [diff] [blame] | 443 | "DCC: Progamming error: Loop unterminated\n"); |
Satyajit Desai | 765e7ef | 2016-11-09 14:27:45 -0800 | [diff] [blame] | 444 | ret = -EINVAL; |
| 445 | goto err; |
| 446 | } |
| 447 | |
| 448 | /* Handling special case of list ending with a rd_mod_wr */ |
| 449 | if (addr == DCC_RD_MOD_WR_DESCRIPTOR) { |
| 450 | addr = (0xC105E) & BM(0, 27); |
| 451 | addr |= DCC_ADDR_DESCRIPTOR; |
| 452 | |
| 453 | dcc_sram_writel(drvdata, addr, sram_offset); |
| 454 | sram_offset += 4; |
| 455 | } |
| 456 | |
| 457 | /* Setting zero to indicate end of the list */ |
| 458 | link = DCC_LINK_DESCRIPTOR; |
| 459 | dcc_sram_writel(drvdata, link, sram_offset); |
| 460 | sram_offset += 4; |
| 461 | |
| 462 | /* Update ram_cfg and check if the data will overstep */ |
| 463 | if (drvdata->data_sink == DCC_DATA_SINK_SRAM && |
| 464 | drvdata->func_type[curr_list] == DCC_FUNC_TYPE_CAPTURE) { |
| 465 | drvdata->ram_cfg = (sram_offset + total_len) / 4; |
| 466 | |
| 467 | if (sram_offset + total_len > drvdata->ram_size) { |
| 468 | sram_offset += total_len; |
| 469 | goto overstep; |
| 470 | } |
| 471 | } else { |
| 472 | drvdata->ram_cfg = sram_offset / 4; |
| 473 | |
| 474 | if (sram_offset > drvdata->ram_size) |
| 475 | goto overstep; |
| 476 | } |
| 477 | |
| 478 | drvdata->ram_start = sram_offset/4; |
| 479 | return 0; |
| 480 | overstep: |
| 481 | ret = -EINVAL; |
| 482 | memset_io(drvdata->ram_base, 0, drvdata->ram_size); |
| 483 | dev_err(drvdata->dev, "DCC SRAM oversteps, 0x%x (0x%x)\n", |
| 484 | sram_offset, drvdata->ram_size); |
| 485 | err: |
| 486 | return ret; |
| 487 | } |
| 488 | |
Satyajit Desai | 765e7ef | 2016-11-09 14:27:45 -0800 | [diff] [blame] | 489 | static void __dcc_first_crc(struct dcc_drvdata *drvdata) |
| 490 | { |
| 491 | int i; |
| 492 | |
| 493 | /* |
| 494 | * Need to send 2 triggers to DCC. First trigger sets CRC error status |
| 495 | * bit. So need second trigger to reset this bit. |
| 496 | */ |
| 497 | for (i = 0; i < 2; i++) { |
| 498 | if (!dcc_ready(drvdata)) |
Satyajit Desai | 3307362 | 2017-04-17 16:45:06 -0700 | [diff] [blame] | 499 | dev_err(drvdata->dev, "DCC is not ready\n"); |
Satyajit Desai | 765e7ef | 2016-11-09 14:27:45 -0800 | [diff] [blame] | 500 | |
| 501 | dcc_writel(drvdata, 1, |
| 502 | DCC_LL_SW_TRIGGER(drvdata->curr_list)); |
| 503 | } |
| 504 | |
| 505 | /* Clear CRC error interrupt */ |
| 506 | dcc_writel(drvdata, BIT(1), |
| 507 | DCC_LL_INT_STATUS(drvdata->curr_list)); |
| 508 | } |
| 509 | |
| 510 | static int dcc_valid_list(struct dcc_drvdata *drvdata, int curr_list) |
| 511 | { |
| 512 | uint32_t lock_reg; |
| 513 | |
| 514 | if (list_empty(&drvdata->cfg_head[curr_list])) |
| 515 | return -EINVAL; |
| 516 | |
| 517 | if (drvdata->enable[curr_list]) { |
Satyajit Desai | 3307362 | 2017-04-17 16:45:06 -0700 | [diff] [blame] | 518 | dev_err(drvdata->dev, "DCC is already enabled\n"); |
Satyajit Desai | 765e7ef | 2016-11-09 14:27:45 -0800 | [diff] [blame] | 519 | return -EINVAL; |
| 520 | } |
| 521 | |
| 522 | lock_reg = dcc_readl(drvdata, DCC_LL_LOCK(curr_list)); |
| 523 | if (lock_reg & 0x1) { |
Satyajit Desai | 3307362 | 2017-04-17 16:45:06 -0700 | [diff] [blame] | 524 | dev_err(drvdata->dev, "DCC is already enabled\n"); |
Satyajit Desai | 765e7ef | 2016-11-09 14:27:45 -0800 | [diff] [blame] | 525 | return -EINVAL; |
| 526 | } |
| 527 | |
| 528 | dev_err(drvdata->dev, "DCC list passed %d\n", curr_list); |
| 529 | return 0; |
| 530 | } |
| 531 | |
| 532 | static int dcc_enable(struct dcc_drvdata *drvdata) |
| 533 | { |
| 534 | int ret = 0; |
| 535 | int list; |
| 536 | uint32_t ram_cfg_base; |
| 537 | |
| 538 | mutex_lock(&drvdata->mutex); |
| 539 | |
Satyajit Desai | 8b8ba6f | 2017-10-24 15:41:05 -0700 | [diff] [blame] | 540 | memset_io(drvdata->ram_base, 0xDE, drvdata->ram_size); |
Satyajit Desai | 765e7ef | 2016-11-09 14:27:45 -0800 | [diff] [blame] | 541 | |
| 542 | for (list = 0; list < DCC_MAX_LINK_LIST; list++) { |
| 543 | |
| 544 | if (dcc_valid_list(drvdata, list)) |
| 545 | continue; |
| 546 | |
| 547 | /* 1. Take ownership of the list */ |
| 548 | dcc_writel(drvdata, BIT(0), DCC_LL_LOCK(list)); |
| 549 | |
| 550 | /* 2. Program linked-list in the SRAM */ |
| 551 | ram_cfg_base = drvdata->ram_cfg; |
| 552 | ret = __dcc_ll_cfg(drvdata, list); |
| 553 | if (ret) { |
| 554 | dev_info(drvdata->dev, "DCC ram programming failed\n"); |
| 555 | goto err; |
| 556 | } |
| 557 | |
Saranya Chidura | 09e31a6 | 2017-10-12 16:59:08 +0530 | [diff] [blame] | 558 | /* 3. program DCC_RAM_CFG reg */ |
| 559 | dcc_writel(drvdata, ram_cfg_base + |
| 560 | drvdata->ram_offset/4, DCC_LL_BASE(list)); |
| 561 | dcc_writel(drvdata, drvdata->ram_start + |
| 562 | drvdata->ram_offset/4, DCC_FD_BASE(list)); |
| 563 | dcc_writel(drvdata, 0xFFF, DCC_LL_TIMEOUT(list)); |
Satyajit Desai | 765e7ef | 2016-11-09 14:27:45 -0800 | [diff] [blame] | 564 | |
Satyajit Desai | dc56a3f | 2017-05-19 12:19:15 -0700 | [diff] [blame] | 565 | /* 4. Configure trigger, data sink and function type */ |
Satyajit Desai | fe1311b | 2017-05-19 16:02:35 -0700 | [diff] [blame] | 566 | dcc_writel(drvdata, BIT(9) | ((drvdata->cti_trig << 8) | |
| 567 | (drvdata->data_sink << 4) | |
Satyajit Desai | 765e7ef | 2016-11-09 14:27:45 -0800 | [diff] [blame] | 568 | (drvdata->func_type[list])), DCC_LL_CFG(list)); |
| 569 | |
| 570 | /* 5. Clears interrupt status register */ |
| 571 | dcc_writel(drvdata, 0, DCC_LL_INT_ENABLE(list)); |
| 572 | dcc_writel(drvdata, (BIT(0) | BIT(1) | BIT(2)), |
| 573 | DCC_LL_INT_STATUS(list)); |
| 574 | |
| 575 | dev_info(drvdata->dev, "All values written to enable"); |
| 576 | /* Make sure all config is written in sram */ |
| 577 | mb(); |
| 578 | |
| 579 | drvdata->enable[list] = 1; |
| 580 | |
| 581 | if (drvdata->func_type[list] == DCC_FUNC_TYPE_CRC) { |
| 582 | __dcc_first_crc(drvdata); |
| 583 | |
| 584 | /* Enable CRC error interrupt */ |
| 585 | if (!drvdata->interrupt_disable) |
| 586 | dcc_writel(drvdata, BIT(1), |
| 587 | DCC_LL_INT_ENABLE(list)); |
| 588 | } |
| 589 | } |
Satyajit Desai | 765e7ef | 2016-11-09 14:27:45 -0800 | [diff] [blame] | 590 | |
| 591 | err: |
| 592 | mutex_unlock(&drvdata->mutex); |
| 593 | return ret; |
| 594 | } |
| 595 | |
| 596 | static void dcc_disable(struct dcc_drvdata *drvdata) |
| 597 | { |
| 598 | int curr_list; |
| 599 | |
| 600 | mutex_lock(&drvdata->mutex); |
| 601 | |
| 602 | if (!dcc_ready(drvdata)) |
Satyajit Desai | 3307362 | 2017-04-17 16:45:06 -0700 | [diff] [blame] | 603 | dev_err(drvdata->dev, "DCC is not ready Disabling DCC...\n"); |
Satyajit Desai | 765e7ef | 2016-11-09 14:27:45 -0800 | [diff] [blame] | 604 | |
| 605 | for (curr_list = 0; curr_list < DCC_MAX_LINK_LIST; curr_list++) { |
| 606 | if (!drvdata->enable[curr_list]) |
| 607 | continue; |
| 608 | |
| 609 | dcc_writel(drvdata, 0, DCC_LL_LOCK(curr_list)); |
| 610 | drvdata->enable[curr_list] = 0; |
| 611 | } |
| 612 | drvdata->ram_cfg = 0; |
| 613 | drvdata->ram_start = 0; |
Satyajit Desai | 765e7ef | 2016-11-09 14:27:45 -0800 | [diff] [blame] | 614 | |
| 615 | mutex_unlock(&drvdata->mutex); |
| 616 | } |
| 617 | |
| 618 | static ssize_t dcc_curr_list(struct device *dev, |
| 619 | struct device_attribute *attr, |
| 620 | const char *buf, size_t size) |
| 621 | { |
| 622 | struct dcc_drvdata *drvdata = dev_get_drvdata(dev); |
| 623 | unsigned long val; |
| 624 | uint32_t lock_reg; |
| 625 | |
| 626 | if (kstrtoul(buf, 16, &val)) |
| 627 | return -EINVAL; |
| 628 | |
| 629 | if (val >= DCC_MAX_LINK_LIST) |
| 630 | return -EINVAL; |
| 631 | |
| 632 | mutex_lock(&drvdata->mutex); |
| 633 | lock_reg = dcc_readl(drvdata, DCC_LL_LOCK(val)); |
| 634 | if (lock_reg & 0x1) { |
Satyajit Desai | 3307362 | 2017-04-17 16:45:06 -0700 | [diff] [blame] | 635 | dev_err(drvdata->dev, "DCC linked list is already configured\n"); |
Satyajit Desai | 765e7ef | 2016-11-09 14:27:45 -0800 | [diff] [blame] | 636 | mutex_unlock(&drvdata->mutex); |
| 637 | return -EINVAL; |
| 638 | } |
| 639 | drvdata->curr_list = val; |
| 640 | mutex_unlock(&drvdata->mutex); |
| 641 | |
| 642 | return size; |
| 643 | } |
| 644 | static DEVICE_ATTR(curr_list, 0200, |
| 645 | NULL, dcc_curr_list); |
| 646 | |
| 647 | static ssize_t dcc_show_func_type(struct device *dev, |
| 648 | struct device_attribute *attr, char *buf) |
| 649 | { |
| 650 | struct dcc_drvdata *drvdata = dev_get_drvdata(dev); |
| 651 | ssize_t len = 0; |
| 652 | unsigned int i; |
| 653 | |
| 654 | for (i = 0; i < DCC_MAX_LINK_LIST; i++) |
| 655 | len += scnprintf(buf + len, PAGE_SIZE - len, "%u :%s\n", |
| 656 | i, str_dcc_func_type[drvdata->func_type[i]]); |
| 657 | |
| 658 | return len; |
| 659 | } |
| 660 | |
| 661 | static ssize_t dcc_store_func_type(struct device *dev, |
| 662 | struct device_attribute *attr, |
| 663 | const char *buf, size_t size) |
| 664 | { |
| 665 | struct dcc_drvdata *drvdata = dev_get_drvdata(dev); |
| 666 | char str[10] = ""; |
| 667 | int ret; |
| 668 | |
| 669 | if (strlen(buf) >= 10) |
| 670 | return -EINVAL; |
| 671 | if (sscanf(buf, "%s", str) != 1) |
| 672 | return -EINVAL; |
| 673 | |
Satyajit Desai | c3b82b3 | 2017-10-30 15:53:11 -0700 | [diff] [blame] | 674 | mutex_lock(&drvdata->mutex); |
Satyajit Desai | 765e7ef | 2016-11-09 14:27:45 -0800 | [diff] [blame] | 675 | if (drvdata->curr_list >= DCC_MAX_LINK_LIST) { |
| 676 | dev_err(dev, |
| 677 | "Select link list to program using curr_list\n"); |
Satyajit Desai | c3b82b3 | 2017-10-30 15:53:11 -0700 | [diff] [blame] | 678 | ret = -EINVAL; |
| 679 | goto out; |
Satyajit Desai | 765e7ef | 2016-11-09 14:27:45 -0800 | [diff] [blame] | 680 | } |
| 681 | |
Satyajit Desai | 765e7ef | 2016-11-09 14:27:45 -0800 | [diff] [blame] | 682 | if (drvdata->enable[drvdata->curr_list]) { |
| 683 | ret = -EBUSY; |
| 684 | goto out; |
| 685 | } |
| 686 | |
| 687 | if (!strcmp(str, str_dcc_func_type[DCC_FUNC_TYPE_CAPTURE])) |
| 688 | drvdata->func_type[drvdata->curr_list] = |
| 689 | DCC_FUNC_TYPE_CAPTURE; |
| 690 | else if (!strcmp(str, str_dcc_func_type[DCC_FUNC_TYPE_CRC])) |
| 691 | drvdata->func_type[drvdata->curr_list] = |
| 692 | DCC_FUNC_TYPE_CRC; |
| 693 | else { |
| 694 | ret = -EINVAL; |
| 695 | goto out; |
| 696 | } |
| 697 | |
| 698 | ret = size; |
| 699 | out: |
| 700 | mutex_unlock(&drvdata->mutex); |
| 701 | return ret; |
| 702 | } |
| 703 | static DEVICE_ATTR(func_type, 0644, |
| 704 | dcc_show_func_type, dcc_store_func_type); |
| 705 | |
| 706 | static ssize_t dcc_show_data_sink(struct device *dev, |
| 707 | struct device_attribute *attr, char *buf) |
| 708 | { |
| 709 | struct dcc_drvdata *drvdata = dev_get_drvdata(dev); |
| 710 | |
| 711 | return scnprintf(buf, PAGE_SIZE, "%s\n", |
| 712 | str_dcc_data_sink[drvdata->data_sink]); |
| 713 | } |
| 714 | |
| 715 | static ssize_t dcc_store_data_sink(struct device *dev, |
| 716 | struct device_attribute *attr, |
| 717 | const char *buf, size_t size) |
| 718 | { |
| 719 | struct dcc_drvdata *drvdata = dev_get_drvdata(dev); |
| 720 | char str[10] = ""; |
| 721 | int ret; |
| 722 | |
| 723 | if (strlen(buf) >= 10) |
| 724 | return -EINVAL; |
| 725 | if (sscanf(buf, "%s", str) != 1) |
| 726 | return -EINVAL; |
| 727 | |
| 728 | mutex_lock(&drvdata->mutex); |
| 729 | if (drvdata->enable[drvdata->curr_list]) { |
| 730 | ret = -EBUSY; |
| 731 | goto out; |
| 732 | } |
| 733 | |
| 734 | if (!strcmp(str, str_dcc_data_sink[DCC_DATA_SINK_SRAM])) |
| 735 | drvdata->data_sink = DCC_DATA_SINK_SRAM; |
| 736 | else if (!strcmp(str, str_dcc_data_sink[DCC_DATA_SINK_ATB])) |
| 737 | drvdata->data_sink = DCC_DATA_SINK_ATB; |
| 738 | else { |
| 739 | ret = -EINVAL; |
| 740 | goto out; |
| 741 | } |
| 742 | |
| 743 | ret = size; |
| 744 | out: |
| 745 | mutex_unlock(&drvdata->mutex); |
| 746 | return ret; |
| 747 | } |
| 748 | static DEVICE_ATTR(data_sink, 0644, |
| 749 | dcc_show_data_sink, dcc_store_data_sink); |
| 750 | |
| 751 | static ssize_t dcc_store_trigger(struct device *dev, |
| 752 | struct device_attribute *attr, |
| 753 | const char *buf, size_t size) |
| 754 | { |
| 755 | int ret = 0; |
| 756 | unsigned long val; |
| 757 | struct dcc_drvdata *drvdata = dev_get_drvdata(dev); |
| 758 | |
| 759 | if (kstrtoul(buf, 16, &val)) |
| 760 | return -EINVAL; |
| 761 | if (val != 1) |
| 762 | return -EINVAL; |
| 763 | |
| 764 | ret = dcc_sw_trigger(drvdata); |
| 765 | if (!ret) |
| 766 | ret = size; |
| 767 | |
| 768 | return ret; |
| 769 | } |
| 770 | static DEVICE_ATTR(trigger, 0200, NULL, dcc_store_trigger); |
| 771 | |
| 772 | static ssize_t dcc_show_enable(struct device *dev, |
| 773 | struct device_attribute *attr, char *buf) |
| 774 | { |
Satyajit Desai | c3b82b3 | 2017-10-30 15:53:11 -0700 | [diff] [blame] | 775 | int ret; |
Satyajit Desai | 765e7ef | 2016-11-09 14:27:45 -0800 | [diff] [blame] | 776 | struct dcc_drvdata *drvdata = dev_get_drvdata(dev); |
| 777 | |
Satyajit Desai | c3b82b3 | 2017-10-30 15:53:11 -0700 | [diff] [blame] | 778 | mutex_lock(&drvdata->mutex); |
| 779 | if (drvdata->curr_list >= DCC_MAX_LINK_LIST) { |
| 780 | dev_err(dev, "Select link list to program using curr_list\n"); |
| 781 | ret = -EINVAL; |
| 782 | goto err; |
| 783 | } |
| 784 | |
| 785 | ret = scnprintf(buf, PAGE_SIZE, "%u\n", |
Satyajit Desai | 765e7ef | 2016-11-09 14:27:45 -0800 | [diff] [blame] | 786 | (unsigned int)drvdata->enable[drvdata->curr_list]); |
Satyajit Desai | c3b82b3 | 2017-10-30 15:53:11 -0700 | [diff] [blame] | 787 | err: |
| 788 | mutex_unlock(&drvdata->mutex); |
| 789 | return ret; |
Satyajit Desai | 765e7ef | 2016-11-09 14:27:45 -0800 | [diff] [blame] | 790 | } |
| 791 | |
| 792 | static ssize_t dcc_store_enable(struct device *dev, |
| 793 | struct device_attribute *attr, |
| 794 | const char *buf, size_t size) |
| 795 | { |
| 796 | int ret = 0; |
| 797 | unsigned long val; |
| 798 | struct dcc_drvdata *drvdata = dev_get_drvdata(dev); |
| 799 | |
| 800 | if (kstrtoul(buf, 16, &val)) |
| 801 | return -EINVAL; |
| 802 | |
| 803 | if (val) |
| 804 | ret = dcc_enable(drvdata); |
| 805 | else |
| 806 | dcc_disable(drvdata); |
| 807 | |
| 808 | if (!ret) |
| 809 | ret = size; |
| 810 | |
| 811 | return ret; |
| 812 | |
| 813 | } |
| 814 | static DEVICE_ATTR(enable, 0644, dcc_show_enable, |
| 815 | dcc_store_enable); |
| 816 | |
| 817 | static ssize_t dcc_show_config(struct device *dev, |
| 818 | struct device_attribute *attr, char *buf) |
| 819 | { |
| 820 | struct dcc_drvdata *drvdata = dev_get_drvdata(dev); |
| 821 | struct dcc_config_entry *entry; |
| 822 | char local_buf[64]; |
| 823 | int len = 0, count = 0; |
| 824 | |
| 825 | buf[0] = '\0'; |
| 826 | |
| 827 | mutex_lock(&drvdata->mutex); |
Satyajit Desai | c3b82b3 | 2017-10-30 15:53:11 -0700 | [diff] [blame] | 828 | if (drvdata->curr_list >= DCC_MAX_LINK_LIST) { |
| 829 | dev_err(dev, "Select link list to program using curr_list\n"); |
| 830 | count = -EINVAL; |
| 831 | goto err; |
| 832 | } |
| 833 | |
Satyajit Desai | 765e7ef | 2016-11-09 14:27:45 -0800 | [diff] [blame] | 834 | list_for_each_entry(entry, |
| 835 | &drvdata->cfg_head[drvdata->curr_list], list) { |
Satyajit Desai | 3307362 | 2017-04-17 16:45:06 -0700 | [diff] [blame] | 836 | switch (entry->desc_type) { |
| 837 | case DCC_READ_WRITE_TYPE: |
Satyajit Desai | 765e7ef | 2016-11-09 14:27:45 -0800 | [diff] [blame] | 838 | len = snprintf(local_buf, 64, |
| 839 | "Index: 0x%x, mask: 0x%x, val: 0x%x\n", |
| 840 | entry->index, entry->mask, |
Satyajit Desai | 3307362 | 2017-04-17 16:45:06 -0700 | [diff] [blame] | 841 | entry->write_val); |
| 842 | break; |
| 843 | case DCC_LOOP_TYPE: |
Satyajit Desai | 765e7ef | 2016-11-09 14:27:45 -0800 | [diff] [blame] | 844 | len = snprintf(local_buf, 64, "Index: 0x%x, Loop: %d\n", |
| 845 | entry->index, entry->loop_cnt); |
Satyajit Desai | 3307362 | 2017-04-17 16:45:06 -0700 | [diff] [blame] | 846 | break; |
| 847 | case DCC_WRITE_TYPE: |
Satyajit Desai | 765e7ef | 2016-11-09 14:27:45 -0800 | [diff] [blame] | 848 | len = snprintf(local_buf, 64, |
Satyajit Desai | e95613c | 2017-05-01 17:04:47 -0700 | [diff] [blame] | 849 | "Write Index: 0x%x, Base: 0x%x, Offset: 0x%x, len: 0x%x APB: %d\n", |
Satyajit Desai | 765e7ef | 2016-11-09 14:27:45 -0800 | [diff] [blame] | 850 | entry->index, entry->base, |
Satyajit Desai | e95613c | 2017-05-01 17:04:47 -0700 | [diff] [blame] | 851 | entry->offset, entry->len, |
| 852 | entry->apb_bus); |
Satyajit Desai | 765e7ef | 2016-11-09 14:27:45 -0800 | [diff] [blame] | 853 | break; |
Satyajit Desai | 3307362 | 2017-04-17 16:45:06 -0700 | [diff] [blame] | 854 | default: |
| 855 | len = snprintf(local_buf, 64, |
Satyajit Desai | e95613c | 2017-05-01 17:04:47 -0700 | [diff] [blame] | 856 | "Read Index: 0x%x, Base: 0x%x, Offset: 0x%x, len: 0x%x APB: %d\n", |
Satyajit Desai | 3307362 | 2017-04-17 16:45:06 -0700 | [diff] [blame] | 857 | entry->index, entry->base, |
Satyajit Desai | e95613c | 2017-05-01 17:04:47 -0700 | [diff] [blame] | 858 | entry->offset, entry->len, |
| 859 | entry->apb_bus); |
Satyajit Desai | 765e7ef | 2016-11-09 14:27:45 -0800 | [diff] [blame] | 860 | } |
| 861 | |
Satyajit Desai | 3307362 | 2017-04-17 16:45:06 -0700 | [diff] [blame] | 862 | if ((count + len) > PAGE_SIZE) { |
| 863 | dev_err(dev, "DCC: Couldn't write complete config\n"); |
| 864 | break; |
| 865 | } |
Satyajit Desai | 765e7ef | 2016-11-09 14:27:45 -0800 | [diff] [blame] | 866 | strlcat(buf, local_buf, PAGE_SIZE); |
| 867 | count += len; |
| 868 | } |
| 869 | |
Satyajit Desai | c3b82b3 | 2017-10-30 15:53:11 -0700 | [diff] [blame] | 870 | err: |
Satyajit Desai | 765e7ef | 2016-11-09 14:27:45 -0800 | [diff] [blame] | 871 | mutex_unlock(&drvdata->mutex); |
Satyajit Desai | 765e7ef | 2016-11-09 14:27:45 -0800 | [diff] [blame] | 872 | return count; |
| 873 | } |
| 874 | |
| 875 | static int dcc_config_add(struct dcc_drvdata *drvdata, unsigned int addr, |
Satyajit Desai | e95613c | 2017-05-01 17:04:47 -0700 | [diff] [blame] | 876 | unsigned int len, int apb_bus) |
Satyajit Desai | 765e7ef | 2016-11-09 14:27:45 -0800 | [diff] [blame] | 877 | { |
| 878 | int ret; |
| 879 | struct dcc_config_entry *entry, *pentry; |
| 880 | unsigned int base, offset; |
| 881 | |
| 882 | mutex_lock(&drvdata->mutex); |
| 883 | |
Satyajit Desai | c3b82b3 | 2017-10-30 15:53:11 -0700 | [diff] [blame] | 884 | if (drvdata->curr_list >= DCC_MAX_LINK_LIST) { |
| 885 | dev_err(drvdata->dev, "Select link list to program using curr_list\n"); |
| 886 | ret = -EINVAL; |
| 887 | goto err; |
| 888 | } |
| 889 | |
Satyajit Desai | 765e7ef | 2016-11-09 14:27:45 -0800 | [diff] [blame] | 890 | if (!len) { |
Satyajit Desai | 3307362 | 2017-04-17 16:45:06 -0700 | [diff] [blame] | 891 | dev_err(drvdata->dev, "DCC: Invalid length\n"); |
Satyajit Desai | 765e7ef | 2016-11-09 14:27:45 -0800 | [diff] [blame] | 892 | ret = -EINVAL; |
| 893 | goto err; |
| 894 | } |
| 895 | |
| 896 | base = addr & BM(4, 31); |
| 897 | |
| 898 | if (!list_empty(&drvdata->cfg_head[drvdata->curr_list])) { |
| 899 | pentry = list_last_entry(&drvdata->cfg_head[drvdata->curr_list], |
| 900 | struct dcc_config_entry, list); |
| 901 | |
| 902 | if (addr >= (pentry->base + pentry->offset) && |
| 903 | addr <= (pentry->base + pentry->offset + MAX_DCC_OFFSET)) { |
| 904 | |
| 905 | /* Re-use base address from last entry */ |
| 906 | base = pentry->base; |
| 907 | |
| 908 | /* |
| 909 | * Check if new address is contiguous to last entry's |
| 910 | * addresses. If yes then we can re-use last entry and |
| 911 | * just need to update its length. |
| 912 | */ |
| 913 | if ((pentry->len * 4 + pentry->base + pentry->offset) |
| 914 | == addr) { |
| 915 | len += pentry->len; |
| 916 | |
| 917 | /* |
| 918 | * Check if last entry can hold additional new |
| 919 | * length. If yes then we don't need to create |
| 920 | * a new entry else we need to add a new entry |
| 921 | * with same base but updated offset. |
| 922 | */ |
| 923 | if (len > MAX_DCC_LEN) |
| 924 | pentry->len = MAX_DCC_LEN; |
| 925 | else |
| 926 | pentry->len = len; |
| 927 | |
| 928 | /* |
| 929 | * Update start addr and len for remaining |
| 930 | * addresses, which will be part of new |
| 931 | * entry. |
| 932 | */ |
| 933 | addr = pentry->base + pentry->offset + |
| 934 | pentry->len * 4; |
| 935 | len -= pentry->len; |
| 936 | } |
| 937 | } |
| 938 | } |
| 939 | |
| 940 | offset = addr - base; |
| 941 | |
| 942 | while (len) { |
| 943 | entry = devm_kzalloc(drvdata->dev, sizeof(*entry), GFP_KERNEL); |
| 944 | if (!entry) { |
| 945 | ret = -ENOMEM; |
| 946 | goto err; |
| 947 | } |
| 948 | |
| 949 | entry->base = base; |
| 950 | entry->offset = offset; |
| 951 | entry->len = min_t(uint32_t, len, MAX_DCC_LEN); |
| 952 | entry->index = drvdata->nr_config[drvdata->curr_list]++; |
Satyajit Desai | 3307362 | 2017-04-17 16:45:06 -0700 | [diff] [blame] | 953 | entry->desc_type = DCC_ADDR_TYPE; |
Satyajit Desai | e95613c | 2017-05-01 17:04:47 -0700 | [diff] [blame] | 954 | entry->apb_bus = apb_bus; |
Satyajit Desai | 765e7ef | 2016-11-09 14:27:45 -0800 | [diff] [blame] | 955 | INIT_LIST_HEAD(&entry->list); |
| 956 | list_add_tail(&entry->list, |
| 957 | &drvdata->cfg_head[drvdata->curr_list]); |
| 958 | |
| 959 | len -= entry->len; |
| 960 | offset += MAX_DCC_LEN * 4; |
| 961 | } |
| 962 | |
| 963 | mutex_unlock(&drvdata->mutex); |
| 964 | return 0; |
| 965 | err: |
| 966 | mutex_unlock(&drvdata->mutex); |
| 967 | return ret; |
| 968 | } |
| 969 | |
| 970 | static ssize_t dcc_store_config(struct device *dev, |
| 971 | struct device_attribute *attr, |
| 972 | const char *buf, size_t size) |
| 973 | { |
Satyajit Desai | e95613c | 2017-05-01 17:04:47 -0700 | [diff] [blame] | 974 | int ret, len, apb_bus; |
Satyajit Desai | 765e7ef | 2016-11-09 14:27:45 -0800 | [diff] [blame] | 975 | unsigned int base; |
| 976 | struct dcc_drvdata *drvdata = dev_get_drvdata(dev); |
| 977 | int nval; |
| 978 | |
Satyajit Desai | e95613c | 2017-05-01 17:04:47 -0700 | [diff] [blame] | 979 | nval = sscanf(buf, "%x %i %d", &base, &len, &apb_bus); |
| 980 | if (nval <= 0 || nval > 3) |
Satyajit Desai | 765e7ef | 2016-11-09 14:27:45 -0800 | [diff] [blame] | 981 | return -EINVAL; |
| 982 | |
Satyajit Desai | e95613c | 2017-05-01 17:04:47 -0700 | [diff] [blame] | 983 | if (nval == 1) { |
| 984 | len = 1; |
| 985 | apb_bus = 0; |
| 986 | } else if (nval == 2) { |
| 987 | apb_bus = 0; |
| 988 | } else { |
| 989 | apb_bus = 1; |
| 990 | } |
| 991 | |
| 992 | ret = dcc_config_add(drvdata, base, len, apb_bus); |
Satyajit Desai | 765e7ef | 2016-11-09 14:27:45 -0800 | [diff] [blame] | 993 | if (ret) |
| 994 | return ret; |
| 995 | |
| 996 | return size; |
| 997 | |
| 998 | } |
| 999 | static DEVICE_ATTR(config, 0644, dcc_show_config, |
| 1000 | dcc_store_config); |
| 1001 | |
| 1002 | static void dcc_config_reset(struct dcc_drvdata *drvdata) |
| 1003 | { |
| 1004 | struct dcc_config_entry *entry, *temp; |
| 1005 | int curr_list; |
| 1006 | |
| 1007 | mutex_lock(&drvdata->mutex); |
| 1008 | |
| 1009 | for (curr_list = 0; curr_list < DCC_MAX_LINK_LIST; curr_list++) { |
| 1010 | |
| 1011 | list_for_each_entry_safe(entry, temp, |
| 1012 | &drvdata->cfg_head[curr_list], list) { |
| 1013 | list_del(&entry->list); |
| 1014 | devm_kfree(drvdata->dev, entry); |
| 1015 | drvdata->nr_config[curr_list]--; |
| 1016 | } |
| 1017 | } |
| 1018 | drvdata->ram_start = 0; |
| 1019 | drvdata->ram_cfg = 0; |
| 1020 | mutex_unlock(&drvdata->mutex); |
| 1021 | } |
| 1022 | |
| 1023 | static ssize_t dcc_store_config_reset(struct device *dev, |
| 1024 | struct device_attribute *attr, |
| 1025 | const char *buf, size_t size) |
| 1026 | { |
| 1027 | unsigned long val; |
| 1028 | struct dcc_drvdata *drvdata = dev_get_drvdata(dev); |
| 1029 | |
| 1030 | if (kstrtoul(buf, 16, &val)) |
| 1031 | return -EINVAL; |
| 1032 | |
| 1033 | if (val) |
| 1034 | dcc_config_reset(drvdata); |
| 1035 | |
| 1036 | return size; |
| 1037 | } |
| 1038 | static DEVICE_ATTR(config_reset, 0200, NULL, dcc_store_config_reset); |
| 1039 | |
| 1040 | static ssize_t dcc_show_crc_error(struct device *dev, |
| 1041 | struct device_attribute *attr, char *buf) |
| 1042 | { |
| 1043 | int ret; |
| 1044 | struct dcc_drvdata *drvdata = dev_get_drvdata(dev); |
| 1045 | |
| 1046 | mutex_lock(&drvdata->mutex); |
Satyajit Desai | c3b82b3 | 2017-10-30 15:53:11 -0700 | [diff] [blame] | 1047 | if (drvdata->curr_list >= DCC_MAX_LINK_LIST) { |
| 1048 | dev_err(dev, "Select link list to program using curr_list\n"); |
| 1049 | ret = -EINVAL; |
| 1050 | goto err; |
| 1051 | } |
| 1052 | |
Satyajit Desai | 765e7ef | 2016-11-09 14:27:45 -0800 | [diff] [blame] | 1053 | if (!drvdata->enable[drvdata->curr_list]) { |
| 1054 | ret = -EINVAL; |
| 1055 | goto err; |
| 1056 | } |
| 1057 | |
| 1058 | ret = scnprintf(buf, PAGE_SIZE, "%u\n", |
| 1059 | (unsigned int)BVAL(dcc_readl( |
| 1060 | drvdata, DCC_LL_INT_STATUS(drvdata->curr_list)), 1)); |
| 1061 | err: |
| 1062 | mutex_unlock(&drvdata->mutex); |
| 1063 | return ret; |
| 1064 | } |
| 1065 | static DEVICE_ATTR(crc_error, 0444, dcc_show_crc_error, NULL); |
| 1066 | |
| 1067 | static ssize_t dcc_show_ready(struct device *dev, |
| 1068 | struct device_attribute *attr, char *buf) |
| 1069 | { |
| 1070 | int ret; |
| 1071 | struct dcc_drvdata *drvdata = dev_get_drvdata(dev); |
| 1072 | |
| 1073 | mutex_lock(&drvdata->mutex); |
Satyajit Desai | c3b82b3 | 2017-10-30 15:53:11 -0700 | [diff] [blame] | 1074 | |
| 1075 | if (drvdata->curr_list >= DCC_MAX_LINK_LIST) { |
| 1076 | dev_err(dev, "Select link list to program using curr_list\n"); |
| 1077 | ret = -EINVAL; |
| 1078 | goto err; |
| 1079 | } |
| 1080 | |
Satyajit Desai | 765e7ef | 2016-11-09 14:27:45 -0800 | [diff] [blame] | 1081 | if (!drvdata->enable[drvdata->curr_list]) { |
| 1082 | ret = -EINVAL; |
| 1083 | goto err; |
| 1084 | } |
| 1085 | |
| 1086 | ret = scnprintf(buf, PAGE_SIZE, "%u\n", |
| 1087 | (unsigned int)BVAL(dcc_readl(drvdata, DCC_STATUS), 1)); |
| 1088 | err: |
| 1089 | mutex_unlock(&drvdata->mutex); |
| 1090 | return ret; |
| 1091 | } |
| 1092 | static DEVICE_ATTR(ready, 0444, dcc_show_ready, NULL); |
| 1093 | |
| 1094 | static ssize_t dcc_show_interrupt_disable(struct device *dev, |
| 1095 | struct device_attribute *attr, |
| 1096 | char *buf) |
| 1097 | { |
| 1098 | struct dcc_drvdata *drvdata = dev_get_drvdata(dev); |
| 1099 | |
| 1100 | return scnprintf(buf, PAGE_SIZE, "%u\n", |
| 1101 | (unsigned int)drvdata->interrupt_disable); |
| 1102 | } |
| 1103 | |
| 1104 | static ssize_t dcc_store_interrupt_disable(struct device *dev, |
| 1105 | struct device_attribute *attr, |
| 1106 | const char *buf, size_t size) |
| 1107 | { |
| 1108 | unsigned long val; |
| 1109 | struct dcc_drvdata *drvdata = dev_get_drvdata(dev); |
| 1110 | |
| 1111 | if (kstrtoul(buf, 16, &val)) |
| 1112 | return -EINVAL; |
| 1113 | |
| 1114 | mutex_lock(&drvdata->mutex); |
| 1115 | drvdata->interrupt_disable = (val ? 1:0); |
| 1116 | mutex_unlock(&drvdata->mutex); |
| 1117 | return size; |
| 1118 | } |
| 1119 | static DEVICE_ATTR(interrupt_disable, 0644, |
| 1120 | dcc_show_interrupt_disable, dcc_store_interrupt_disable); |
| 1121 | |
Satyajit Desai | af71a5a | 2017-09-29 14:30:43 -0700 | [diff] [blame] | 1122 | static int dcc_add_loop(struct dcc_drvdata *drvdata, unsigned long loop_cnt) |
| 1123 | { |
| 1124 | struct dcc_config_entry *entry; |
| 1125 | |
| 1126 | entry = devm_kzalloc(drvdata->dev, sizeof(*entry), GFP_KERNEL); |
| 1127 | if (!entry) |
| 1128 | return -ENOMEM; |
| 1129 | |
| 1130 | entry->loop_cnt = min_t(uint32_t, loop_cnt, MAX_LOOP_CNT); |
| 1131 | entry->index = drvdata->nr_config[drvdata->curr_list]++; |
| 1132 | entry->desc_type = DCC_LOOP_TYPE; |
| 1133 | INIT_LIST_HEAD(&entry->list); |
| 1134 | list_add_tail(&entry->list, &drvdata->cfg_head[drvdata->curr_list]); |
| 1135 | |
| 1136 | return 0; |
| 1137 | } |
| 1138 | |
Satyajit Desai | 765e7ef | 2016-11-09 14:27:45 -0800 | [diff] [blame] | 1139 | static ssize_t dcc_store_loop(struct device *dev, |
| 1140 | struct device_attribute *attr, |
| 1141 | const char *buf, size_t size) |
| 1142 | { |
Satyajit Desai | af71a5a | 2017-09-29 14:30:43 -0700 | [diff] [blame] | 1143 | int ret; |
Satyajit Desai | 765e7ef | 2016-11-09 14:27:45 -0800 | [diff] [blame] | 1144 | unsigned long loop_cnt; |
| 1145 | struct dcc_drvdata *drvdata = dev_get_drvdata(dev); |
Satyajit Desai | 765e7ef | 2016-11-09 14:27:45 -0800 | [diff] [blame] | 1146 | |
| 1147 | mutex_lock(&drvdata->mutex); |
| 1148 | |
Satyajit Desai | 9e1ffcb | 2017-05-23 12:40:08 -0700 | [diff] [blame] | 1149 | if (kstrtoul(buf, 16, &loop_cnt)) { |
Satyajit Desai | 765e7ef | 2016-11-09 14:27:45 -0800 | [diff] [blame] | 1150 | ret = -EINVAL; |
Satyajit Desai | 9e1ffcb | 2017-05-23 12:40:08 -0700 | [diff] [blame] | 1151 | goto err; |
| 1152 | } |
| 1153 | |
| 1154 | if (drvdata->curr_list >= DCC_MAX_LINK_LIST) { |
| 1155 | dev_err(dev, "Select link list to program using curr_list\n"); |
| 1156 | ret = -EINVAL; |
| 1157 | goto err; |
| 1158 | } |
Satyajit Desai | 765e7ef | 2016-11-09 14:27:45 -0800 | [diff] [blame] | 1159 | |
Satyajit Desai | af71a5a | 2017-09-29 14:30:43 -0700 | [diff] [blame] | 1160 | ret = dcc_add_loop(drvdata, loop_cnt); |
| 1161 | if (ret) |
Satyajit Desai | 765e7ef | 2016-11-09 14:27:45 -0800 | [diff] [blame] | 1162 | goto err; |
Satyajit Desai | 765e7ef | 2016-11-09 14:27:45 -0800 | [diff] [blame] | 1163 | |
Satyajit Desai | af71a5a | 2017-09-29 14:30:43 -0700 | [diff] [blame] | 1164 | mutex_unlock(&drvdata->mutex); |
| 1165 | return size; |
Satyajit Desai | 765e7ef | 2016-11-09 14:27:45 -0800 | [diff] [blame] | 1166 | err: |
| 1167 | mutex_unlock(&drvdata->mutex); |
| 1168 | return ret; |
| 1169 | } |
| 1170 | static DEVICE_ATTR(loop, 0200, NULL, dcc_store_loop); |
| 1171 | |
| 1172 | static ssize_t dcc_rd_mod_wr(struct device *dev, |
| 1173 | struct device_attribute *attr, |
| 1174 | const char *buf, size_t size) |
| 1175 | { |
| 1176 | int ret = size; |
| 1177 | int nval; |
| 1178 | unsigned int mask, val; |
| 1179 | struct dcc_drvdata *drvdata = dev_get_drvdata(dev); |
| 1180 | struct dcc_config_entry *entry; |
| 1181 | |
| 1182 | mutex_lock(&drvdata->mutex); |
| 1183 | |
| 1184 | nval = sscanf(buf, "%x %x", &mask, &val); |
| 1185 | |
| 1186 | if (nval <= 1 || nval > 2) { |
| 1187 | ret = -EINVAL; |
| 1188 | goto err; |
| 1189 | } |
| 1190 | |
Satyajit Desai | c3b82b3 | 2017-10-30 15:53:11 -0700 | [diff] [blame] | 1191 | if (drvdata->curr_list >= DCC_MAX_LINK_LIST) { |
| 1192 | dev_err(dev, "Select link list to program using curr_list\n"); |
| 1193 | ret = -EINVAL; |
| 1194 | goto err; |
| 1195 | } |
| 1196 | |
Satyajit Desai | 765e7ef | 2016-11-09 14:27:45 -0800 | [diff] [blame] | 1197 | if (list_empty(&drvdata->cfg_head[drvdata->curr_list])) { |
Satyajit Desai | 3307362 | 2017-04-17 16:45:06 -0700 | [diff] [blame] | 1198 | dev_err(drvdata->dev, "DCC: No read address programmed\n"); |
Satyajit Desai | 765e7ef | 2016-11-09 14:27:45 -0800 | [diff] [blame] | 1199 | ret = -EPERM; |
| 1200 | goto err; |
| 1201 | } |
| 1202 | |
| 1203 | entry = devm_kzalloc(drvdata->dev, sizeof(*entry), GFP_KERNEL); |
| 1204 | if (!entry) { |
| 1205 | ret = -ENOMEM; |
| 1206 | goto err; |
| 1207 | } |
| 1208 | |
Satyajit Desai | 3307362 | 2017-04-17 16:45:06 -0700 | [diff] [blame] | 1209 | entry->desc_type = DCC_READ_WRITE_TYPE; |
Satyajit Desai | 765e7ef | 2016-11-09 14:27:45 -0800 | [diff] [blame] | 1210 | entry->mask = mask; |
Satyajit Desai | 3307362 | 2017-04-17 16:45:06 -0700 | [diff] [blame] | 1211 | entry->write_val = val; |
Satyajit Desai | 765e7ef | 2016-11-09 14:27:45 -0800 | [diff] [blame] | 1212 | entry->index = drvdata->nr_config[drvdata->curr_list]++; |
| 1213 | INIT_LIST_HEAD(&entry->list); |
| 1214 | list_add_tail(&entry->list, &drvdata->cfg_head[drvdata->curr_list]); |
| 1215 | err: |
| 1216 | mutex_unlock(&drvdata->mutex); |
| 1217 | return ret; |
| 1218 | } |
| 1219 | static DEVICE_ATTR(rd_mod_wr, 0200, NULL, dcc_rd_mod_wr); |
| 1220 | |
Satyajit Desai | af71a5a | 2017-09-29 14:30:43 -0700 | [diff] [blame] | 1221 | static int dcc_add_write(struct dcc_drvdata *drvdata, unsigned int addr, |
| 1222 | unsigned int write_val, int apb_bus) |
| 1223 | { |
| 1224 | struct dcc_config_entry *entry; |
| 1225 | |
| 1226 | entry = devm_kzalloc(drvdata->dev, sizeof(*entry), GFP_KERNEL); |
| 1227 | if (!entry) |
| 1228 | return -ENOMEM; |
| 1229 | |
| 1230 | entry->desc_type = DCC_WRITE_TYPE; |
| 1231 | entry->base = addr & BM(4, 31); |
| 1232 | entry->offset = addr - entry->base; |
| 1233 | entry->write_val = write_val; |
| 1234 | entry->index = drvdata->nr_config[drvdata->curr_list]++; |
| 1235 | entry->len = 1; |
| 1236 | entry->apb_bus = apb_bus; |
| 1237 | INIT_LIST_HEAD(&entry->list); |
| 1238 | list_add_tail(&entry->list, &drvdata->cfg_head[drvdata->curr_list]); |
| 1239 | |
| 1240 | return 0; |
| 1241 | } |
| 1242 | |
Satyajit Desai | 3307362 | 2017-04-17 16:45:06 -0700 | [diff] [blame] | 1243 | static ssize_t dcc_write(struct device *dev, |
| 1244 | struct device_attribute *attr, |
| 1245 | const char *buf, size_t size) |
| 1246 | { |
Satyajit Desai | af71a5a | 2017-09-29 14:30:43 -0700 | [diff] [blame] | 1247 | int ret; |
Satyajit Desai | 3307362 | 2017-04-17 16:45:06 -0700 | [diff] [blame] | 1248 | int nval; |
| 1249 | unsigned int addr, write_val; |
Satyajit Desai | af71a5a | 2017-09-29 14:30:43 -0700 | [diff] [blame] | 1250 | int apb_bus = 0; |
Satyajit Desai | 3307362 | 2017-04-17 16:45:06 -0700 | [diff] [blame] | 1251 | struct dcc_drvdata *drvdata = dev_get_drvdata(dev); |
Satyajit Desai | 3307362 | 2017-04-17 16:45:06 -0700 | [diff] [blame] | 1252 | |
| 1253 | mutex_lock(&drvdata->mutex); |
| 1254 | |
Satyajit Desai | e95613c | 2017-05-01 17:04:47 -0700 | [diff] [blame] | 1255 | nval = sscanf(buf, "%x %x %d", &addr, &write_val, &apb_bus); |
Satyajit Desai | 3307362 | 2017-04-17 16:45:06 -0700 | [diff] [blame] | 1256 | |
Satyajit Desai | 9e1ffcb | 2017-05-23 12:40:08 -0700 | [diff] [blame] | 1257 | if (nval <= 1 || nval > 3) { |
| 1258 | ret = -EINVAL; |
| 1259 | goto err; |
Satyajit Desai | 3307362 | 2017-04-17 16:45:06 -0700 | [diff] [blame] | 1260 | } |
| 1261 | |
Satyajit Desai | 9e1ffcb | 2017-05-23 12:40:08 -0700 | [diff] [blame] | 1262 | if (drvdata->curr_list >= DCC_MAX_LINK_LIST) { |
| 1263 | dev_err(dev, "Select link list to program using curr_list\n"); |
Satyajit Desai | 3307362 | 2017-04-17 16:45:06 -0700 | [diff] [blame] | 1264 | ret = -EINVAL; |
| 1265 | goto err; |
| 1266 | } |
| 1267 | |
Satyajit Desai | af71a5a | 2017-09-29 14:30:43 -0700 | [diff] [blame] | 1268 | if (nval == 3 && apb_bus != 0) |
| 1269 | apb_bus = 1; |
| 1270 | |
| 1271 | ret = dcc_add_write(drvdata, addr, write_val, apb_bus); |
| 1272 | if (ret) |
Satyajit Desai | 3307362 | 2017-04-17 16:45:06 -0700 | [diff] [blame] | 1273 | goto err; |
Satyajit Desai | 3307362 | 2017-04-17 16:45:06 -0700 | [diff] [blame] | 1274 | |
Satyajit Desai | af71a5a | 2017-09-29 14:30:43 -0700 | [diff] [blame] | 1275 | mutex_unlock(&drvdata->mutex); |
| 1276 | return size; |
Satyajit Desai | 3307362 | 2017-04-17 16:45:06 -0700 | [diff] [blame] | 1277 | err: |
| 1278 | mutex_unlock(&drvdata->mutex); |
| 1279 | return ret; |
| 1280 | } |
| 1281 | static DEVICE_ATTR(config_write, 0200, NULL, dcc_write); |
| 1282 | |
Satyajit Desai | fe1311b | 2017-05-19 16:02:35 -0700 | [diff] [blame] | 1283 | static ssize_t dcc_show_cti_trig(struct device *dev, |
| 1284 | struct device_attribute *attr, char *buf) |
| 1285 | { |
| 1286 | struct dcc_drvdata *drvdata = dev_get_drvdata(dev); |
| 1287 | |
| 1288 | return scnprintf(buf, PAGE_SIZE, "%d\n", drvdata->cti_trig); |
| 1289 | } |
| 1290 | |
| 1291 | static ssize_t dcc_store_cti_trig(struct device *dev, |
| 1292 | struct device_attribute *attr, |
| 1293 | const char *buf, size_t size) |
| 1294 | { |
| 1295 | unsigned long val; |
| 1296 | int ret = 0; |
| 1297 | struct dcc_drvdata *drvdata = dev_get_drvdata(dev); |
| 1298 | |
| 1299 | if (kstrtoul(buf, 16, &val)) |
| 1300 | return -EINVAL; |
| 1301 | |
| 1302 | mutex_lock(&drvdata->mutex); |
| 1303 | |
Satyajit Desai | c3b82b3 | 2017-10-30 15:53:11 -0700 | [diff] [blame] | 1304 | if (drvdata->curr_list >= DCC_MAX_LINK_LIST) { |
| 1305 | dev_err(dev, "Select link list to program using curr_list\n"); |
| 1306 | ret = -EINVAL; |
| 1307 | goto out; |
| 1308 | } |
| 1309 | |
Satyajit Desai | fe1311b | 2017-05-19 16:02:35 -0700 | [diff] [blame] | 1310 | if (drvdata->enable[drvdata->curr_list]) { |
| 1311 | ret = -EBUSY; |
| 1312 | goto out; |
| 1313 | } |
| 1314 | |
| 1315 | if (val) |
| 1316 | drvdata->cti_trig = 1; |
| 1317 | else |
| 1318 | drvdata->cti_trig = 0; |
| 1319 | out: |
| 1320 | mutex_unlock(&drvdata->mutex); |
| 1321 | return ret; |
| 1322 | } |
| 1323 | static DEVICE_ATTR(cti_trig, 0644, |
| 1324 | dcc_show_cti_trig, dcc_store_cti_trig); |
| 1325 | |
Satyajit Desai | 765e7ef | 2016-11-09 14:27:45 -0800 | [diff] [blame] | 1326 | static const struct device_attribute *dcc_attrs[] = { |
| 1327 | &dev_attr_func_type, |
| 1328 | &dev_attr_data_sink, |
| 1329 | &dev_attr_trigger, |
| 1330 | &dev_attr_enable, |
| 1331 | &dev_attr_config, |
| 1332 | &dev_attr_config_reset, |
| 1333 | &dev_attr_ready, |
| 1334 | &dev_attr_crc_error, |
| 1335 | &dev_attr_interrupt_disable, |
| 1336 | &dev_attr_loop, |
| 1337 | &dev_attr_rd_mod_wr, |
| 1338 | &dev_attr_curr_list, |
Satyajit Desai | 3307362 | 2017-04-17 16:45:06 -0700 | [diff] [blame] | 1339 | &dev_attr_config_write, |
Satyajit Desai | fe1311b | 2017-05-19 16:02:35 -0700 | [diff] [blame] | 1340 | &dev_attr_cti_trig, |
Satyajit Desai | 765e7ef | 2016-11-09 14:27:45 -0800 | [diff] [blame] | 1341 | NULL, |
| 1342 | }; |
| 1343 | |
| 1344 | static int dcc_create_files(struct device *dev, |
| 1345 | const struct device_attribute **attrs) |
| 1346 | { |
| 1347 | int ret = 0, i; |
| 1348 | |
| 1349 | for (i = 0; attrs[i] != NULL; i++) { |
| 1350 | ret = device_create_file(dev, attrs[i]); |
| 1351 | if (ret) { |
Satyajit Desai | 3307362 | 2017-04-17 16:45:06 -0700 | [diff] [blame] | 1352 | dev_err(dev, "DCC: Couldn't create sysfs attribute: %s\n", |
Satyajit Desai | 765e7ef | 2016-11-09 14:27:45 -0800 | [diff] [blame] | 1353 | attrs[i]->attr.name); |
| 1354 | break; |
| 1355 | } |
| 1356 | } |
| 1357 | return ret; |
| 1358 | } |
| 1359 | |
| 1360 | static int dcc_sram_open(struct inode *inode, struct file *file) |
| 1361 | { |
| 1362 | struct dcc_drvdata *drvdata = container_of(inode->i_cdev, |
| 1363 | struct dcc_drvdata, |
| 1364 | sram_dev); |
| 1365 | file->private_data = drvdata; |
| 1366 | |
| 1367 | return 0; |
| 1368 | } |
| 1369 | |
| 1370 | static ssize_t dcc_sram_read(struct file *file, char __user *data, |
| 1371 | size_t len, loff_t *ppos) |
| 1372 | { |
| 1373 | unsigned char *buf; |
| 1374 | struct dcc_drvdata *drvdata = file->private_data; |
| 1375 | |
| 1376 | /* EOF check */ |
| 1377 | if (drvdata->ram_size <= *ppos) |
| 1378 | return 0; |
| 1379 | |
| 1380 | if ((*ppos + len) > drvdata->ram_size) |
| 1381 | len = (drvdata->ram_size - *ppos); |
| 1382 | |
| 1383 | buf = kzalloc(len, GFP_KERNEL); |
| 1384 | if (!buf) |
| 1385 | return -ENOMEM; |
| 1386 | |
| 1387 | memcpy_fromio(buf, (drvdata->ram_base + *ppos), len); |
| 1388 | |
| 1389 | if (copy_to_user(data, buf, len)) { |
| 1390 | dev_err(drvdata->dev, |
Satyajit Desai | 3307362 | 2017-04-17 16:45:06 -0700 | [diff] [blame] | 1391 | "DCC: Couldn't copy all data to user\n"); |
Satyajit Desai | 765e7ef | 2016-11-09 14:27:45 -0800 | [diff] [blame] | 1392 | kfree(buf); |
| 1393 | return -EFAULT; |
| 1394 | } |
| 1395 | |
| 1396 | *ppos += len; |
| 1397 | |
| 1398 | kfree(buf); |
| 1399 | |
| 1400 | return len; |
| 1401 | } |
| 1402 | |
| 1403 | static const struct file_operations dcc_sram_fops = { |
| 1404 | .owner = THIS_MODULE, |
| 1405 | .open = dcc_sram_open, |
| 1406 | .read = dcc_sram_read, |
| 1407 | .llseek = no_llseek, |
| 1408 | }; |
| 1409 | |
| 1410 | static int dcc_sram_dev_register(struct dcc_drvdata *drvdata) |
| 1411 | { |
| 1412 | int ret; |
| 1413 | struct device *device; |
| 1414 | dev_t dev; |
| 1415 | |
| 1416 | ret = alloc_chrdev_region(&dev, 0, 1, drvdata->sram_node); |
| 1417 | if (ret) |
| 1418 | goto err_alloc; |
| 1419 | |
| 1420 | cdev_init(&drvdata->sram_dev, &dcc_sram_fops); |
| 1421 | |
| 1422 | drvdata->sram_dev.owner = THIS_MODULE; |
| 1423 | ret = cdev_add(&drvdata->sram_dev, dev, 1); |
| 1424 | if (ret) |
| 1425 | goto err_cdev_add; |
| 1426 | |
| 1427 | drvdata->sram_class = class_create(THIS_MODULE, |
| 1428 | drvdata->sram_node); |
| 1429 | if (IS_ERR(drvdata->sram_class)) { |
| 1430 | ret = PTR_ERR(drvdata->sram_class); |
| 1431 | goto err_class_create; |
| 1432 | } |
| 1433 | |
| 1434 | device = device_create(drvdata->sram_class, NULL, |
| 1435 | drvdata->sram_dev.dev, drvdata, |
| 1436 | drvdata->sram_node); |
| 1437 | if (IS_ERR(device)) { |
| 1438 | ret = PTR_ERR(device); |
| 1439 | goto err_dev_create; |
| 1440 | } |
| 1441 | |
| 1442 | return 0; |
| 1443 | err_dev_create: |
| 1444 | class_destroy(drvdata->sram_class); |
| 1445 | err_class_create: |
| 1446 | cdev_del(&drvdata->sram_dev); |
| 1447 | err_cdev_add: |
| 1448 | unregister_chrdev_region(drvdata->sram_dev.dev, 1); |
| 1449 | err_alloc: |
| 1450 | return ret; |
| 1451 | } |
| 1452 | |
| 1453 | static void dcc_sram_dev_deregister(struct dcc_drvdata *drvdata) |
| 1454 | { |
| 1455 | device_destroy(drvdata->sram_class, drvdata->sram_dev.dev); |
| 1456 | class_destroy(drvdata->sram_class); |
| 1457 | cdev_del(&drvdata->sram_dev); |
| 1458 | unregister_chrdev_region(drvdata->sram_dev.dev, 1); |
| 1459 | } |
| 1460 | |
| 1461 | static int dcc_sram_dev_init(struct dcc_drvdata *drvdata) |
| 1462 | { |
| 1463 | int ret = 0; |
| 1464 | size_t node_size; |
| 1465 | char *node_name = "dcc_sram"; |
| 1466 | struct device *dev = drvdata->dev; |
| 1467 | |
| 1468 | node_size = strlen(node_name) + 1; |
| 1469 | |
| 1470 | drvdata->sram_node = devm_kzalloc(dev, node_size, GFP_KERNEL); |
| 1471 | if (!drvdata->sram_node) |
| 1472 | return -ENOMEM; |
| 1473 | |
| 1474 | strlcpy(drvdata->sram_node, node_name, node_size); |
| 1475 | ret = dcc_sram_dev_register(drvdata); |
| 1476 | if (ret) |
| 1477 | dev_err(drvdata->dev, "DCC: sram node not registered.\n"); |
| 1478 | |
| 1479 | return ret; |
| 1480 | } |
| 1481 | |
| 1482 | static void dcc_sram_dev_exit(struct dcc_drvdata *drvdata) |
| 1483 | { |
| 1484 | dcc_sram_dev_deregister(drvdata); |
| 1485 | } |
| 1486 | |
Satyajit Desai | af71a5a | 2017-09-29 14:30:43 -0700 | [diff] [blame] | 1487 | static void dcc_configure_list(struct dcc_drvdata *drvdata, |
| 1488 | struct device_node *np) |
| 1489 | { |
| 1490 | int ret, i; |
| 1491 | const __be32 *prop; |
| 1492 | uint32_t len, entry, val1, val2, apb_bus; |
| 1493 | uint32_t curr_link_list; |
| 1494 | |
| 1495 | ret = of_property_read_u32(np, "qcom,curr-link-list", |
| 1496 | &curr_link_list); |
| 1497 | if (ret) |
| 1498 | return; |
| 1499 | |
| 1500 | if (curr_link_list >= DCC_MAX_LINK_LIST) { |
| 1501 | dev_err(drvdata->dev, "List configuration failed"); |
| 1502 | return; |
| 1503 | } |
| 1504 | drvdata->curr_list = curr_link_list; |
| 1505 | |
| 1506 | prop = of_get_property(np, "qcom,link-list", &len); |
| 1507 | if (prop) { |
| 1508 | len /= sizeof(__be32); |
| 1509 | i = 0; |
| 1510 | while (i < len) { |
| 1511 | entry = be32_to_cpu(prop[i++]); |
| 1512 | val1 = be32_to_cpu(prop[i++]); |
| 1513 | val2 = be32_to_cpu(prop[i++]); |
| 1514 | apb_bus = be32_to_cpu(prop[i++]); |
| 1515 | |
| 1516 | switch (entry) { |
| 1517 | case DCC_READ: |
| 1518 | ret = dcc_config_add(drvdata, val1, |
| 1519 | val2, apb_bus); |
| 1520 | break; |
| 1521 | case DCC_WRITE: |
| 1522 | ret = dcc_add_write(drvdata, val1, |
| 1523 | val2, apb_bus); |
| 1524 | break; |
| 1525 | case DCC_LOOP: |
| 1526 | ret = dcc_add_loop(drvdata, val1); |
| 1527 | break; |
| 1528 | default: |
| 1529 | ret = -EINVAL; |
| 1530 | } |
| 1531 | |
| 1532 | if (ret) { |
| 1533 | dev_err(drvdata->dev, |
| 1534 | "DCC init time config failed err:%d\n", |
| 1535 | ret); |
| 1536 | break; |
| 1537 | } |
| 1538 | } |
| 1539 | |
| 1540 | if (!ret) |
| 1541 | dcc_enable(drvdata); |
| 1542 | } |
| 1543 | } |
| 1544 | |
Satyajit Desai | 765e7ef | 2016-11-09 14:27:45 -0800 | [diff] [blame] | 1545 | static int dcc_probe(struct platform_device *pdev) |
| 1546 | { |
| 1547 | int ret, i; |
| 1548 | struct device *dev = &pdev->dev; |
| 1549 | struct dcc_drvdata *drvdata; |
| 1550 | struct resource *res; |
| 1551 | const char *data_sink; |
| 1552 | |
| 1553 | drvdata = devm_kzalloc(dev, sizeof(*drvdata), GFP_KERNEL); |
| 1554 | if (!drvdata) |
| 1555 | return -ENOMEM; |
| 1556 | |
| 1557 | drvdata->dev = &pdev->dev; |
| 1558 | platform_set_drvdata(pdev, drvdata); |
| 1559 | |
| 1560 | res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "dcc-base"); |
| 1561 | if (!res) |
| 1562 | return -EINVAL; |
| 1563 | |
| 1564 | drvdata->reg_size = resource_size(res); |
| 1565 | drvdata->base = devm_ioremap(dev, res->start, resource_size(res)); |
| 1566 | if (!drvdata->base) |
| 1567 | return -ENOMEM; |
| 1568 | |
| 1569 | res = platform_get_resource_byname(pdev, IORESOURCE_MEM, |
| 1570 | "dcc-ram-base"); |
| 1571 | if (!res) |
| 1572 | return -EINVAL; |
| 1573 | |
| 1574 | drvdata->ram_size = resource_size(res); |
| 1575 | drvdata->ram_base = devm_ioremap(dev, res->start, resource_size(res)); |
| 1576 | if (!drvdata->ram_base) |
| 1577 | return -ENOMEM; |
| 1578 | |
Satyajit Desai | 3d86e1b | 2017-04-13 17:11:09 -0700 | [diff] [blame] | 1579 | ret = of_property_read_u32(pdev->dev.of_node, "dcc-ram-offset", |
| 1580 | &drvdata->ram_offset); |
| 1581 | if (ret) |
| 1582 | return -EINVAL; |
| 1583 | |
Satyajit Desai | 765e7ef | 2016-11-09 14:27:45 -0800 | [diff] [blame] | 1584 | mutex_init(&drvdata->mutex); |
| 1585 | |
| 1586 | for (i = 0; i < DCC_MAX_LINK_LIST; i++) { |
| 1587 | INIT_LIST_HEAD(&drvdata->cfg_head[i]); |
| 1588 | drvdata->nr_config[i] = 0; |
| 1589 | } |
| 1590 | |
| 1591 | memset_io(drvdata->ram_base, 0, drvdata->ram_size); |
| 1592 | |
| 1593 | drvdata->data_sink = DCC_DATA_SINK_SRAM; |
| 1594 | ret = of_property_read_string(pdev->dev.of_node, "qcom,data-sink", |
| 1595 | &data_sink); |
| 1596 | if (!ret) { |
| 1597 | for (i = 0; i < ARRAY_SIZE(str_dcc_data_sink); i++) |
| 1598 | if (!strcmp(data_sink, str_dcc_data_sink[i])) { |
| 1599 | drvdata->data_sink = i; |
| 1600 | break; |
| 1601 | } |
| 1602 | |
| 1603 | if (i == ARRAY_SIZE(str_dcc_data_sink)) { |
Satyajit Desai | 3307362 | 2017-04-17 16:45:06 -0700 | [diff] [blame] | 1604 | dev_err(dev, "Unknown sink type for DCC Using '%s' as data sink\n", |
Satyajit Desai | 765e7ef | 2016-11-09 14:27:45 -0800 | [diff] [blame] | 1605 | str_dcc_data_sink[drvdata->data_sink]); |
| 1606 | } |
| 1607 | } |
| 1608 | |
| 1609 | drvdata->curr_list = DCC_INVALID_LINK_LIST; |
| 1610 | |
| 1611 | ret = dcc_sram_dev_init(drvdata); |
| 1612 | if (ret) |
| 1613 | goto err; |
| 1614 | |
| 1615 | ret = dcc_create_files(dev, dcc_attrs); |
| 1616 | if (ret) |
| 1617 | goto err; |
| 1618 | |
Satyajit Desai | af71a5a | 2017-09-29 14:30:43 -0700 | [diff] [blame] | 1619 | dcc_configure_list(drvdata, pdev->dev.of_node); |
| 1620 | |
Satyajit Desai | 765e7ef | 2016-11-09 14:27:45 -0800 | [diff] [blame] | 1621 | return 0; |
| 1622 | err: |
| 1623 | return ret; |
| 1624 | } |
| 1625 | |
| 1626 | static int dcc_remove(struct platform_device *pdev) |
| 1627 | { |
| 1628 | struct dcc_drvdata *drvdata = platform_get_drvdata(pdev); |
| 1629 | |
| 1630 | dcc_sram_dev_exit(drvdata); |
| 1631 | |
| 1632 | dcc_config_reset(drvdata); |
| 1633 | |
| 1634 | return 0; |
| 1635 | } |
| 1636 | |
| 1637 | static const struct of_device_id msm_dcc_match[] = { |
Mao Jinlong | 99337ac | 2018-04-09 14:36:26 +0800 | [diff] [blame] | 1638 | { .compatible = "qcom,dcc-v2"}, |
Satyajit Desai | 765e7ef | 2016-11-09 14:27:45 -0800 | [diff] [blame] | 1639 | {} |
| 1640 | }; |
| 1641 | |
| 1642 | static struct platform_driver dcc_driver = { |
| 1643 | .probe = dcc_probe, |
| 1644 | .remove = dcc_remove, |
| 1645 | .driver = { |
| 1646 | .name = "msm-dcc", |
| 1647 | .owner = THIS_MODULE, |
| 1648 | .of_match_table = msm_dcc_match, |
| 1649 | }, |
| 1650 | }; |
| 1651 | |
| 1652 | static int __init dcc_init(void) |
| 1653 | { |
| 1654 | return platform_driver_register(&dcc_driver); |
| 1655 | } |
Satyajit Desai | af71a5a | 2017-09-29 14:30:43 -0700 | [diff] [blame] | 1656 | pure_initcall(dcc_init); |
Satyajit Desai | 765e7ef | 2016-11-09 14:27:45 -0800 | [diff] [blame] | 1657 | |
| 1658 | MODULE_LICENSE("GPL v2"); |
| 1659 | MODULE_DESCRIPTION("MSM data capture and compare engine"); |