Patrick Georgi | 7051707 | 2020-05-10 18:47:05 +0200 | [diff] [blame] | 1 | /* SPDX-License-Identifier: BSD-3-Clause */ |
Prudhvi Yarlagadda | 58ed173 | 2019-04-15 21:32:12 +0530 | [diff] [blame] | 2 | |
| 3 | #include <device/mmio.h> |
| 4 | #include <console/console.h> |
| 5 | #include <delay.h> |
Jes Klinke | 19baa9d | 2022-02-22 16:00:09 -0800 | [diff] [blame] | 6 | #include <timer.h> |
Prudhvi Yarlagadda | 58ed173 | 2019-04-15 21:32:12 +0530 | [diff] [blame] | 7 | #include <soc/gpio.h> |
| 8 | #include <soc/iomap.h> |
Prudhvi Yarlagadda | 58ed173 | 2019-04-15 21:32:12 +0530 | [diff] [blame] | 9 | #include <soc/qup.h> |
| 10 | |
| 11 | #define TIMEOUT_CNT 100 |
| 12 | |
| 13 | #define QUP_ADDR(id, reg) (blsp_qup_base(id) + (reg)) |
| 14 | |
| 15 | #define QUP_DEBUG 0 |
| 16 | |
| 17 | #define QUPDBG BIOS_ERR, "\t-> " |
| 18 | |
| 19 | #if QUP_DEBUG |
| 20 | #define qup_write32(a, v) do { \ |
| 21 | write32(a, v); \ |
Julius Werner | 540a980 | 2019-12-09 13:03:29 -0800 | [diff] [blame] | 22 | printk(QUPDBG "%s(%d): write32(%p, 0x%x)\n", \ |
Prudhvi Yarlagadda | 58ed173 | 2019-04-15 21:32:12 +0530 | [diff] [blame] | 23 | __func__, __LINE__, a, v); \ |
| 24 | } while (0) |
| 25 | #else |
| 26 | #define qup_write32 write32 |
| 27 | #endif |
| 28 | |
| 29 | struct i2c_clk_div_fld { |
| 30 | u32 clk_freq_out; |
| 31 | u8 fs_div; |
| 32 | u8 ht_div; |
| 33 | }; |
| 34 | |
| 35 | static struct i2c_clk_div_fld i2c_clk_div_map[] = { |
| 36 | {100000, 124, 62}, |
| 37 | {400000, 28, 14}, |
| 38 | {1000000, 8, 5}, |
| 39 | }; |
| 40 | |
| 41 | static void i2c_set_mstr_clk_ctl(unsigned int id, unsigned int hz) |
| 42 | { |
| 43 | int i; |
| 44 | struct i2c_clk_div_fld *itr = i2c_clk_div_map; |
| 45 | u8 fs_div = 0; |
| 46 | u8 ht_div = 0; |
| 47 | u32 mstr_clk_ctl; |
| 48 | |
| 49 | for (i = 0; i < ARRAY_SIZE(i2c_clk_div_map); ++i, ++itr) { |
| 50 | if (hz == itr->clk_freq_out) { |
| 51 | if (!fs_div) |
| 52 | fs_div = itr->fs_div; |
| 53 | if (!ht_div) |
| 54 | ht_div = itr->ht_div; |
| 55 | break; |
| 56 | } |
| 57 | } |
| 58 | |
| 59 | /* format values in clk-ctl cache */ |
| 60 | mstr_clk_ctl = ((ht_div & 0xff) << 16) | (fs_div & 0xff); |
| 61 | qup_write32(QUP_ADDR(id, QUP_I2C_MASTER_CLK_CTL), mstr_clk_ctl); |
| 62 | } |
| 63 | |
Prudhvi Yarlagadda | 58ed173 | 2019-04-15 21:32:12 +0530 | [diff] [blame] | 64 | static qup_return_t qup_i2c_master_status(blsp_qup_id_t id) |
| 65 | { |
| 66 | uint32_t reg_val = read32(QUP_ADDR(id, QUP_I2C_MASTER_STATUS)); |
| 67 | |
| 68 | if (read32(QUP_ADDR(id, QUP_ERROR_FLAGS))) |
| 69 | return QUP_ERR_XFER_FAIL; |
| 70 | |
| 71 | #if QUP_DEBUG |
| 72 | printk(QUPDBG "%s: 0x%x\n", __func__, reg_val); |
| 73 | #endif |
| 74 | |
| 75 | if (reg_val & QUP_I2C_INVALID_READ_ADDR) |
| 76 | return QUP_ERR_I2C_INVALID_SLAVE_ADDR; |
| 77 | if (reg_val & QUP_I2C_FAILED_MASK) |
| 78 | return QUP_ERR_I2C_FAILED; |
| 79 | if (reg_val & QUP_I2C_ARB_LOST) |
| 80 | return QUP_ERR_I2C_ARB_LOST; |
| 81 | if (reg_val & QUP_I2C_BUS_ERROR) |
| 82 | return QUP_ERR_I2C_BUS_ERROR; |
| 83 | if (reg_val & QUP_I2C_INVALID_WRITE) |
| 84 | return QUP_ERR_I2C_INVALID_WRITE; |
| 85 | if (reg_val & QUP_I2C_PACKET_NACK) |
| 86 | return QUP_ERR_I2C_NACK; |
| 87 | if (reg_val & QUP_I2C_INVALID_TAG) |
| 88 | return QUP_ERR_I2C_INVALID_TAG; |
| 89 | |
| 90 | return QUP_SUCCESS; |
| 91 | } |
| 92 | |
| 93 | static int check_bit_state(uint32_t *reg, int wait_for) |
| 94 | { |
| 95 | unsigned int count = TIMEOUT_CNT; |
| 96 | |
| 97 | while ((read32(reg) & (QUP_STATE_VALID_MASK | QUP_STATE_MASK)) != |
| 98 | (QUP_STATE_VALID | wait_for)) { |
| 99 | if (count == 0) |
| 100 | return QUP_ERR_TIMEOUT; |
| 101 | count--; |
| 102 | } |
| 103 | |
| 104 | return QUP_SUCCESS; |
| 105 | } |
| 106 | |
| 107 | /* |
| 108 | * Check whether GSBIn_QUP State is valid |
| 109 | */ |
| 110 | static qup_return_t qup_wait_for_state(blsp_qup_id_t id, unsigned int wait_for) |
| 111 | { |
| 112 | return check_bit_state(QUP_ADDR(id, QUP_STATE), wait_for); |
| 113 | } |
| 114 | |
| 115 | qup_return_t qup_reset_i2c_master_status(blsp_qup_id_t id) |
| 116 | { |
| 117 | /* |
| 118 | * The I2C_STATUS is a status register. |
| 119 | * Writing any value clears the status bits. |
| 120 | */ |
| 121 | qup_write32(QUP_ADDR(id, QUP_I2C_MASTER_STATUS), 0); |
| 122 | return QUP_SUCCESS; |
| 123 | } |
| 124 | |
| 125 | static qup_return_t qup_reset_master_status(blsp_qup_id_t id) |
| 126 | { |
| 127 | qup_write32(QUP_ADDR(id, QUP_ERROR_FLAGS), 0x3C); |
| 128 | qup_write32(QUP_ADDR(id, QUP_ERROR_FLAGS_EN), 0x3C); |
| 129 | qup_reset_i2c_master_status(id); |
| 130 | return QUP_SUCCESS; |
| 131 | } |
| 132 | |
Jes Klinke | 19baa9d | 2022-02-22 16:00:09 -0800 | [diff] [blame] | 133 | static qup_return_t qup_fifo_wait_for(blsp_qup_id_t id, uint32_t status, |
| 134 | struct stopwatch *timeout) |
Prudhvi Yarlagadda | 58ed173 | 2019-04-15 21:32:12 +0530 | [diff] [blame] | 135 | { |
| 136 | qup_return_t ret = QUP_ERR_UNDEFINED; |
Prudhvi Yarlagadda | 58ed173 | 2019-04-15 21:32:12 +0530 | [diff] [blame] | 137 | |
| 138 | while (!(read32(QUP_ADDR(id, QUP_OPERATIONAL)) & status)) { |
| 139 | ret = qup_i2c_master_status(id); |
| 140 | if (ret) |
| 141 | return ret; |
Jes Klinke | 19baa9d | 2022-02-22 16:00:09 -0800 | [diff] [blame] | 142 | if (stopwatch_expired(timeout)) |
Prudhvi Yarlagadda | 58ed173 | 2019-04-15 21:32:12 +0530 | [diff] [blame] | 143 | return QUP_ERR_TIMEOUT; |
Prudhvi Yarlagadda | 58ed173 | 2019-04-15 21:32:12 +0530 | [diff] [blame] | 144 | } |
| 145 | |
| 146 | return QUP_SUCCESS; |
| 147 | } |
| 148 | |
Jes Klinke | 19baa9d | 2022-02-22 16:00:09 -0800 | [diff] [blame] | 149 | static qup_return_t qup_fifo_wait_while(blsp_qup_id_t id, uint32_t status, |
| 150 | struct stopwatch *timeout) |
Prudhvi Yarlagadda | 58ed173 | 2019-04-15 21:32:12 +0530 | [diff] [blame] | 151 | { |
| 152 | qup_return_t ret = QUP_ERR_UNDEFINED; |
Prudhvi Yarlagadda | 58ed173 | 2019-04-15 21:32:12 +0530 | [diff] [blame] | 153 | |
| 154 | while (read32(QUP_ADDR(id, QUP_OPERATIONAL)) & status) { |
| 155 | ret = qup_i2c_master_status(id); |
| 156 | if (ret) |
| 157 | return ret; |
Jes Klinke | 19baa9d | 2022-02-22 16:00:09 -0800 | [diff] [blame] | 158 | if (stopwatch_expired(timeout)) |
Prudhvi Yarlagadda | 58ed173 | 2019-04-15 21:32:12 +0530 | [diff] [blame] | 159 | return QUP_ERR_TIMEOUT; |
Prudhvi Yarlagadda | 58ed173 | 2019-04-15 21:32:12 +0530 | [diff] [blame] | 160 | } |
| 161 | |
| 162 | return QUP_SUCCESS; |
| 163 | } |
| 164 | |
| 165 | static inline uint32_t qup_i2c_create_output_tag(int stop, u8 data) |
| 166 | { |
| 167 | uint32_t tag; |
| 168 | |
| 169 | if (stop) |
| 170 | tag = QUP_I2C_STOP_SEQ | QUP_I2C_DATA(data); |
| 171 | else |
| 172 | tag = QUP_I2C_DATA_SEQ | QUP_I2C_DATA(data); |
| 173 | |
| 174 | return tag; |
| 175 | } |
| 176 | |
Jes Klinke | 19baa9d | 2022-02-22 16:00:09 -0800 | [diff] [blame] | 177 | static inline qup_return_t qup_i2c_write_fifo_flush(blsp_qup_id_t id, |
| 178 | struct stopwatch *timeout) |
Prudhvi Yarlagadda | 58ed173 | 2019-04-15 21:32:12 +0530 | [diff] [blame] | 179 | { |
| 180 | qup_return_t ret = QUP_ERR_UNDEFINED; |
| 181 | |
| 182 | qup_write32(QUP_ADDR(id, QUP_OPERATIONAL), OUTPUT_SERVICE_FLAG); |
| 183 | |
| 184 | mdelay(4); /* TPM seems to need this */ |
| 185 | |
Jes Klinke | 19baa9d | 2022-02-22 16:00:09 -0800 | [diff] [blame] | 186 | ret = qup_fifo_wait_while(id, OUTPUT_FIFO_NOT_EMPTY, timeout); |
Prudhvi Yarlagadda | 58ed173 | 2019-04-15 21:32:12 +0530 | [diff] [blame] | 187 | if (ret) |
| 188 | return ret; |
| 189 | |
| 190 | ret = qup_i2c_master_status(id); |
| 191 | |
| 192 | if (ret) |
| 193 | printk(BIOS_DEBUG, "%s: error\n", __func__); |
| 194 | |
| 195 | return ret; |
| 196 | } |
| 197 | |
| 198 | static qup_return_t qup_i2c_write_fifo(blsp_qup_id_t id, qup_data_t *p_tx_obj, |
| 199 | uint8_t stop_seq) |
| 200 | { |
| 201 | qup_return_t ret = QUP_ERR_UNDEFINED; |
| 202 | uint8_t addr = p_tx_obj->p.iic.addr; |
| 203 | uint8_t *data_ptr = p_tx_obj->p.iic.data; |
| 204 | unsigned int data_len = p_tx_obj->p.iic.data_len; |
| 205 | unsigned int idx = 0; |
| 206 | uint32_t tag, *fifo = QUP_ADDR(id, QUP_OUTPUT_FIFO); |
Jes Klinke | 19baa9d | 2022-02-22 16:00:09 -0800 | [diff] [blame] | 207 | struct stopwatch timeout; |
Prudhvi Yarlagadda | 58ed173 | 2019-04-15 21:32:12 +0530 | [diff] [blame] | 208 | |
| 209 | qup_reset_master_status(id); |
| 210 | |
| 211 | qup_write32(QUP_ADDR(id, QUP_MX_OUTPUT_COUNT), data_len + 1); |
| 212 | |
| 213 | qup_set_state(id, QUP_STATE_RUN); |
| 214 | |
| 215 | /* |
| 216 | * Since UNPACK enable is set in io mode register, populate 2 tags |
| 217 | * for each fifo register. |
| 218 | * |
| 219 | * Create the first tag as follows, with the start tag and first byte |
| 220 | * of the data to be written |
| 221 | * +--------+--------+--------+--------+ |
| 222 | * | STOP / | data | START | ADDR | |
| 223 | * |DATA tag| byte | tag | << 1 | |
| 224 | * +--------+--------+--------+--------+ |
| 225 | * rest will be created in the following while loop. |
| 226 | */ |
| 227 | tag = qup_i2c_create_output_tag(data_len == 1 && stop_seq, |
| 228 | data_ptr[idx]); |
| 229 | tag = ((tag << 16) & 0xffff0000) | |
| 230 | (QUP_I2C_START_SEQ | QUP_I2C_ADDR(addr)); |
| 231 | data_len--; |
| 232 | idx++; |
| 233 | |
| 234 | qup_write32(fifo, tag); |
| 235 | |
Jes Klinke | 19baa9d | 2022-02-22 16:00:09 -0800 | [diff] [blame] | 236 | stopwatch_init_usecs_expire(&timeout, CONFIG_I2C_TRANSFER_TIMEOUT_US); |
Prudhvi Yarlagadda | 58ed173 | 2019-04-15 21:32:12 +0530 | [diff] [blame] | 237 | while (data_len) { |
Prudhvi Yarlagadda | 58ed173 | 2019-04-15 21:32:12 +0530 | [diff] [blame] | 238 | tag = qup_i2c_create_output_tag(data_len == 1 && stop_seq, |
| 239 | data_ptr[idx]); |
| 240 | data_len--; |
| 241 | idx++; |
| 242 | |
| 243 | if (data_len) { |
| 244 | tag |= qup_i2c_create_output_tag( |
| 245 | data_len == 1 && stop_seq, |
| 246 | data_ptr[idx]) << 16; |
| 247 | data_len--; |
| 248 | idx++; |
| 249 | } |
| 250 | |
| 251 | qup_write32(fifo, tag); |
| 252 | |
Jes Klinke | 19baa9d | 2022-02-22 16:00:09 -0800 | [diff] [blame] | 253 | ret = qup_i2c_write_fifo_flush(id, &timeout); |
Prudhvi Yarlagadda | 58ed173 | 2019-04-15 21:32:12 +0530 | [diff] [blame] | 254 | |
| 255 | if (ret) { |
| 256 | printk(QUPDBG "%s: error\n", __func__); |
| 257 | return ret; |
| 258 | } |
| 259 | } |
| 260 | |
Jes Klinke | 19baa9d | 2022-02-22 16:00:09 -0800 | [diff] [blame] | 261 | ret = qup_i2c_write_fifo_flush(id, &timeout); |
Prudhvi Yarlagadda | 58ed173 | 2019-04-15 21:32:12 +0530 | [diff] [blame] | 262 | |
| 263 | qup_set_state(id, QUP_STATE_RESET); |
| 264 | |
| 265 | return ret; |
| 266 | } |
| 267 | |
| 268 | static qup_return_t qup_i2c_write(blsp_qup_id_t id, uint8_t mode, |
| 269 | qup_data_t *p_tx_obj, uint8_t stop_seq) |
| 270 | { |
| 271 | qup_return_t ret = QUP_ERR_UNDEFINED; |
| 272 | |
| 273 | switch (mode) { |
| 274 | case QUP_MODE_FIFO: |
| 275 | case QUP_MODE_BLOCK: |
| 276 | ret = qup_i2c_write_fifo(id, p_tx_obj, stop_seq); |
| 277 | break; |
| 278 | default: |
| 279 | ret = QUP_ERR_UNSUPPORTED; |
| 280 | } |
| 281 | |
| 282 | if (ret) { |
| 283 | qup_set_state(id, QUP_STATE_RESET); |
| 284 | printk(QUPDBG "%s() failed (%d)\n", __func__, ret); |
| 285 | } |
| 286 | |
| 287 | return ret; |
| 288 | } |
| 289 | |
| 290 | static int qup_i2c_parse_tag(uint32_t data, uint8_t *data_ptr, uint32_t len) |
| 291 | { |
| 292 | int i, idx = 0; |
| 293 | int max = (len > 2) ? 2 : len; |
| 294 | |
| 295 | for (i = 0; i < max; i++) { |
| 296 | switch (QUP_I2C_MI_TAG(data)) { |
| 297 | case QUP_I2C_MIDATA_SEQ: |
| 298 | data_ptr[idx] = QUP_I2C_DATA(data); |
| 299 | idx++; |
| 300 | break; |
| 301 | case QUP_I2C_MISTOP_SEQ: |
| 302 | data_ptr[idx] = QUP_I2C_DATA(data); |
| 303 | idx++; |
| 304 | return idx; |
| 305 | default: |
| 306 | printk(QUPDBG "%s: Unexpected tag (0x%x)\n", __func__, |
| 307 | QUP_I2C_MI_TAG(data)); |
| 308 | return -1; |
| 309 | } |
| 310 | |
| 311 | data = (data >> 16); |
| 312 | } |
| 313 | |
| 314 | return idx; |
| 315 | } |
| 316 | |
| 317 | static qup_return_t qup_i2c_read_fifo(blsp_qup_id_t id, qup_data_t *p_tx_obj) |
| 318 | { |
| 319 | qup_return_t ret = QUP_ERR_UNDEFINED; |
| 320 | uint8_t addr = p_tx_obj->p.iic.addr; |
| 321 | uint8_t *data_ptr = p_tx_obj->p.iic.data; |
| 322 | unsigned int data_len = p_tx_obj->p.iic.data_len; |
| 323 | unsigned int idx = 0; |
| 324 | uint32_t *fifo = QUP_ADDR(id, QUP_OUTPUT_FIFO); |
Jes Klinke | 19baa9d | 2022-02-22 16:00:09 -0800 | [diff] [blame] | 325 | struct stopwatch timeout; |
Prudhvi Yarlagadda | 58ed173 | 2019-04-15 21:32:12 +0530 | [diff] [blame] | 326 | |
| 327 | qup_reset_master_status(id); |
| 328 | |
| 329 | qup_write32(QUP_ADDR(id, QUP_IO_MODES), |
| 330 | QUP_UNPACK_EN | QUP_PACK_EN | |
| 331 | ((QUP_MODE_BLOCK & QUP_MODE_MASK) << |
| 332 | QUP_OUTPUT_MODE_SHFT) | |
| 333 | ((QUP_MODE_BLOCK & QUP_MODE_MASK) << |
| 334 | QUP_INPUT_MODE_SHFT)); |
| 335 | |
| 336 | qup_write32(QUP_ADDR(id, QUP_MX_INPUT_COUNT), data_len); |
| 337 | |
| 338 | qup_set_state(id, QUP_STATE_RUN); |
| 339 | |
| 340 | qup_write32(fifo, (QUP_I2C_START_SEQ | |
| 341 | (QUP_I2C_ADDR(addr) | QUP_I2C_SLAVE_READ)) | |
| 342 | ((QUP_I2C_RECV_SEQ | data_len) << 16)); |
| 343 | |
Jes Klinke | 19baa9d | 2022-02-22 16:00:09 -0800 | [diff] [blame] | 344 | stopwatch_init_usecs_expire(&timeout, CONFIG_I2C_TRANSFER_TIMEOUT_US); |
| 345 | ret = qup_i2c_write_fifo_flush(id, &timeout); |
Prudhvi Yarlagadda | 58ed173 | 2019-04-15 21:32:12 +0530 | [diff] [blame] | 346 | if (ret) { |
| 347 | printk(QUPDBG "%s: OUTPUT_FIFO_NOT_EMPTY\n", __func__); |
| 348 | return ret; |
| 349 | } |
| 350 | |
Jes Klinke | 19baa9d | 2022-02-22 16:00:09 -0800 | [diff] [blame] | 351 | ret = qup_fifo_wait_for(id, INPUT_SERVICE_FLAG, &timeout); |
Prudhvi Yarlagadda | 58ed173 | 2019-04-15 21:32:12 +0530 | [diff] [blame] | 352 | if (ret) { |
| 353 | printk(QUPDBG "%s: INPUT_SERVICE_FLAG\n", __func__); |
| 354 | return ret; |
| 355 | } |
| 356 | |
| 357 | fifo = QUP_ADDR(id, QUP_INPUT_FIFO); |
| 358 | |
| 359 | while (data_len) { |
| 360 | uint32_t data; |
| 361 | int count; |
| 362 | |
| 363 | data = read32(fifo); |
| 364 | mdelay(1); |
| 365 | |
| 366 | count = qup_i2c_parse_tag(data, data_ptr + idx, data_len); |
| 367 | |
| 368 | if (count < 0) { |
| 369 | printk(QUPDBG "%s: Cannot parse tag 0x%x\n", |
| 370 | __func__, data); |
| 371 | qup_set_state(id, QUP_STATE_PAUSE); |
| 372 | |
| 373 | return QUP_ERR_I2C_INVALID_TAG; |
| 374 | } |
| 375 | |
| 376 | idx += count; |
| 377 | data_len -= count; |
| 378 | |
| 379 | qup_write32(QUP_ADDR(id, QUP_OPERATIONAL), INPUT_SERVICE_FLAG); |
| 380 | } |
| 381 | |
| 382 | p_tx_obj->p.iic.data_len = idx; |
| 383 | |
| 384 | qup_write32(QUP_ADDR(id, QUP_MX_READ_COUNT), 0); |
| 385 | |
| 386 | qup_set_state(id, QUP_STATE_RESET); |
| 387 | |
| 388 | return QUP_SUCCESS; |
| 389 | } |
| 390 | |
| 391 | static qup_return_t qup_i2c_read(blsp_qup_id_t id, uint8_t mode, |
| 392 | qup_data_t *p_tx_obj) |
| 393 | { |
| 394 | qup_return_t ret = QUP_ERR_UNDEFINED; |
| 395 | |
| 396 | qup_set_state(id, QUP_STATE_RESET); |
| 397 | |
| 398 | switch (mode) { |
| 399 | case QUP_MODE_FIFO: |
| 400 | case QUP_MODE_BLOCK: |
| 401 | ret = qup_i2c_read_fifo(id, p_tx_obj); |
| 402 | break; |
| 403 | default: |
| 404 | ret = QUP_ERR_UNSUPPORTED; |
| 405 | } |
| 406 | |
| 407 | if (ret) { |
| 408 | qup_set_state(id, QUP_STATE_RESET); |
| 409 | printk(QUPDBG "%s() failed (%d)\n", __func__, ret); |
| 410 | } |
| 411 | |
| 412 | return ret; |
| 413 | } |
| 414 | |
| 415 | qup_return_t qup_init(blsp_qup_id_t id, const qup_config_t *config_ptr) |
| 416 | { |
| 417 | qup_return_t ret = QUP_ERR_UNDEFINED; |
| 418 | uint32_t reg_val; |
| 419 | |
| 420 | /* Reset the QUP core.*/ |
| 421 | qup_write32(QUP_ADDR(id, QUP_SW_RESET), 0x1); |
| 422 | |
| 423 | /* Wait till the reset takes effect */ |
| 424 | ret = qup_wait_for_state(id, QUP_STATE_RESET); |
| 425 | if (ret) |
| 426 | goto bailout; |
| 427 | |
| 428 | /* Reset the config */ |
| 429 | qup_write32(QUP_ADDR(id, QUP_CONFIG), 0); |
| 430 | |
| 431 | /* Program the config register */ |
| 432 | /* Set N value */ |
| 433 | reg_val = 0x0F; |
| 434 | /* Set protocol */ |
| 435 | switch (config_ptr->protocol) { |
| 436 | case QUP_MINICORE_I2C_MASTER: |
| 437 | reg_val |= ((config_ptr->protocol & |
| 438 | QUP_MINI_CORE_PROTO_MASK) << |
| 439 | QUP_MINI_CORE_PROTO_SHFT); |
| 440 | break; |
| 441 | default: |
| 442 | ret = QUP_ERR_UNSUPPORTED; |
| 443 | goto bailout; |
| 444 | } |
| 445 | reg_val |= QUP_APP_CLK_ON_EN | QUP_CORE_CLK_ON_EN; |
| 446 | qup_write32(QUP_ADDR(id, QUP_CONFIG), reg_val); |
| 447 | |
| 448 | /* Choose version 1 tag */ |
| 449 | qup_write32(QUP_ADDR(id, QUP_I2C_MASTER_CONFIG), 0); |
| 450 | |
| 451 | /* Reset i2c clk cntl register */ |
| 452 | qup_write32(QUP_ADDR(id, QUP_I2C_MASTER_CLK_CTL), 0); |
| 453 | |
| 454 | /* Set QUP IO Mode */ |
| 455 | switch (config_ptr->mode) { |
| 456 | case QUP_MODE_FIFO: |
| 457 | case QUP_MODE_BLOCK: |
| 458 | reg_val = QUP_UNPACK_EN | QUP_PACK_EN | |
| 459 | ((config_ptr->mode & QUP_MODE_MASK) << |
| 460 | QUP_OUTPUT_MODE_SHFT) | |
| 461 | ((config_ptr->mode & QUP_MODE_MASK) << |
| 462 | QUP_INPUT_MODE_SHFT); |
| 463 | break; |
| 464 | default: |
| 465 | ret = QUP_ERR_UNSUPPORTED; |
| 466 | goto bailout; |
| 467 | } |
| 468 | qup_write32(QUP_ADDR(id, QUP_IO_MODES), reg_val); |
| 469 | |
| 470 | /*Set i2c clk cntl*/ |
| 471 | i2c_set_mstr_clk_ctl(id, 400000); |
| 472 | |
| 473 | qup_set_state(id, QUP_STATE_RESET); |
| 474 | bailout: |
| 475 | if (ret) |
| 476 | printk(QUPDBG "failed to init qup (%d)\n", ret); |
| 477 | |
| 478 | return ret; |
| 479 | } |
| 480 | |
| 481 | qup_return_t qup_set_state(blsp_qup_id_t id, uint32_t state) |
| 482 | { |
| 483 | qup_return_t ret = QUP_ERR_UNDEFINED; |
| 484 | unsigned int curr_state = read32(QUP_ADDR(id, QUP_STATE)); |
| 485 | |
| 486 | if ((state <= QUP_STATE_PAUSE) |
| 487 | && (curr_state & QUP_STATE_VALID_MASK)) { |
| 488 | /* |
| 489 | * For PAUSE_STATE to RESET_STATE transition, |
| 490 | * two writes of 10[binary]) are required for the |
| 491 | * transition to complete. |
| 492 | */ |
| 493 | if (curr_state == QUP_STATE_PAUSE && state == QUP_STATE_RESET) { |
| 494 | qup_write32(QUP_ADDR(id, QUP_STATE), 0x2); |
| 495 | qup_write32(QUP_ADDR(id, QUP_STATE), 0x2); |
| 496 | } else { |
| 497 | qup_write32(QUP_ADDR(id, QUP_STATE), state); |
| 498 | } |
| 499 | ret = qup_wait_for_state(id, state); |
| 500 | } |
| 501 | |
| 502 | return ret; |
| 503 | } |
| 504 | |
| 505 | static qup_return_t qup_i2c_send_data(blsp_qup_id_t id, qup_data_t *p_tx_obj, |
| 506 | uint8_t stop_seq) |
| 507 | { |
| 508 | qup_return_t ret = QUP_ERR_UNDEFINED; |
| 509 | uint8_t mode = (read32(QUP_ADDR(id, QUP_IO_MODES)) >> |
| 510 | QUP_OUTPUT_MODE_SHFT) & QUP_MODE_MASK; |
| 511 | |
| 512 | ret = qup_i2c_write(id, mode, p_tx_obj, stop_seq); |
| 513 | if (QUP_DEBUG) { |
| 514 | int i; |
| 515 | |
| 516 | printk(BIOS_DEBUG, "i2c tx bus %d device %2.2x:", |
| 517 | id, p_tx_obj->p.iic.addr); |
| 518 | for (i = 0; i < p_tx_obj->p.iic.data_len; i++) |
| 519 | printk(BIOS_DEBUG, " %2.2x", p_tx_obj->p.iic.data[i]); |
| 520 | printk(BIOS_DEBUG, "\n"); |
| 521 | } |
| 522 | |
| 523 | return ret; |
| 524 | } |
| 525 | |
| 526 | qup_return_t qup_send_data(blsp_qup_id_t id, qup_data_t *p_tx_obj, |
| 527 | uint8_t stop_seq) |
| 528 | { |
| 529 | qup_return_t ret = QUP_ERR_UNDEFINED; |
| 530 | |
| 531 | if (p_tx_obj->protocol == ((read32(QUP_ADDR(id, QUP_CONFIG)) >> |
| 532 | QUP_MINI_CORE_PROTO_SHFT) & QUP_MINI_CORE_PROTO_MASK)) { |
| 533 | switch (p_tx_obj->protocol) { |
| 534 | case QUP_MINICORE_I2C_MASTER: |
| 535 | ret = qup_i2c_send_data(id, p_tx_obj, stop_seq); |
| 536 | break; |
| 537 | default: |
| 538 | ret = QUP_ERR_UNSUPPORTED; |
| 539 | } |
| 540 | } |
| 541 | |
| 542 | return ret; |
| 543 | } |
| 544 | |
| 545 | static qup_return_t qup_i2c_recv_data(blsp_qup_id_t id, qup_data_t *p_rx_obj) |
| 546 | { |
| 547 | qup_return_t ret = QUP_ERR_UNDEFINED; |
| 548 | uint8_t mode = (read32(QUP_ADDR(id, QUP_IO_MODES)) >> |
| 549 | QUP_INPUT_MODE_SHFT) & QUP_MODE_MASK; |
| 550 | |
| 551 | ret = qup_i2c_read(id, mode, p_rx_obj); |
| 552 | if (QUP_DEBUG) { |
| 553 | int i; |
| 554 | |
| 555 | printk(BIOS_DEBUG, "i2c rxed on bus %d device %2.2x:", |
| 556 | id, p_rx_obj->p.iic.addr); |
| 557 | for (i = 0; i < p_rx_obj->p.iic.data_len; i++) |
| 558 | printk(BIOS_DEBUG, " %2.2x", p_rx_obj->p.iic.data[i]); |
| 559 | printk(BIOS_DEBUG, "\n"); |
| 560 | } |
| 561 | |
| 562 | return ret; |
| 563 | } |
| 564 | |
| 565 | qup_return_t qup_recv_data(blsp_qup_id_t id, qup_data_t *p_rx_obj) |
| 566 | { |
| 567 | qup_return_t ret = QUP_ERR_UNDEFINED; |
| 568 | |
| 569 | if (p_rx_obj->protocol == ((read32(QUP_ADDR(id, QUP_CONFIG)) >> |
| 570 | QUP_MINI_CORE_PROTO_SHFT) & QUP_MINI_CORE_PROTO_MASK)) { |
| 571 | switch (p_rx_obj->protocol) { |
| 572 | case QUP_MINICORE_I2C_MASTER: |
| 573 | ret = qup_i2c_recv_data(id, p_rx_obj); |
| 574 | break; |
| 575 | default: |
| 576 | ret = QUP_ERR_UNSUPPORTED; |
| 577 | } |
| 578 | } |
| 579 | |
| 580 | return ret; |
| 581 | } |