Kévin Redon | 4cd3f7d | 2019-01-24 17:57:13 +0100 | [diff] [blame] | 1 | |
| 2 | /** |
| 3 | * \file |
| 4 | * |
| 5 | * \brief SAM Serial Communication Interface |
| 6 | * |
| 7 | * Copyright (c) 2014-2018 Microchip Technology Inc. and its subsidiaries. |
| 8 | * |
| 9 | * \asf_license_start |
| 10 | * |
| 11 | * \page License |
| 12 | * |
| 13 | * Subject to your compliance with these terms, you may use Microchip |
| 14 | * software and any derivatives exclusively with Microchip products. |
| 15 | * It is your responsibility to comply with third party license terms applicable |
| 16 | * to your use of third party software (including open source software) that |
| 17 | * may accompany Microchip software. |
| 18 | * |
| 19 | * THIS SOFTWARE IS SUPPLIED BY MICROCHIP "AS IS". NO WARRANTIES, |
| 20 | * WHETHER EXPRESS, IMPLIED OR STATUTORY, APPLY TO THIS SOFTWARE, |
| 21 | * INCLUDING ANY IMPLIED WARRANTIES OF NON-INFRINGEMENT, MERCHANTABILITY, |
| 22 | * AND FITNESS FOR A PARTICULAR PURPOSE. IN NO EVENT WILL MICROCHIP BE |
| 23 | * LIABLE FOR ANY INDIRECT, SPECIAL, PUNITIVE, INCIDENTAL OR CONSEQUENTIAL |
| 24 | * LOSS, DAMAGE, COST OR EXPENSE OF ANY KIND WHATSOEVER RELATED TO THE |
| 25 | * SOFTWARE, HOWEVER CAUSED, EVEN IF MICROCHIP HAS BEEN ADVISED OF THE |
| 26 | * POSSIBILITY OR THE DAMAGES ARE FORESEEABLE. TO THE FULLEST EXTENT |
| 27 | * ALLOWED BY LAW, MICROCHIP'S TOTAL LIABILITY ON ALL CLAIMS IN ANY WAY |
| 28 | * RELATED TO THIS SOFTWARE WILL NOT EXCEED THE AMOUNT OF FEES, IF ANY, |
| 29 | * THAT YOU HAVE PAID DIRECTLY TO MICROCHIP FOR THIS SOFTWARE. |
| 30 | * |
| 31 | * \asf_license_stop |
| 32 | * |
| 33 | */ |
| 34 | #include <hpl_dma.h> |
| 35 | #include <hpl_i2c_m_async.h> |
| 36 | #include <hpl_i2c_m_sync.h> |
| 37 | #include <hpl_i2c_s_async.h> |
| 38 | #include <hpl_sercom_config.h> |
| 39 | #include <hpl_spi_m_async.h> |
| 40 | #include <hpl_spi_m_sync.h> |
| 41 | #include <hpl_spi_s_async.h> |
| 42 | #include <hpl_spi_s_sync.h> |
| 43 | #include <hpl_usart_async.h> |
| 44 | #include <hpl_usart_sync.h> |
| 45 | #include <utils.h> |
| 46 | #include <utils_assert.h> |
| 47 | |
| 48 | #ifndef CONF_SERCOM_0_USART_ENABLE |
| 49 | #define CONF_SERCOM_0_USART_ENABLE 0 |
| 50 | #endif |
| 51 | #ifndef CONF_SERCOM_1_USART_ENABLE |
| 52 | #define CONF_SERCOM_1_USART_ENABLE 0 |
| 53 | #endif |
| 54 | #ifndef CONF_SERCOM_2_USART_ENABLE |
| 55 | #define CONF_SERCOM_2_USART_ENABLE 0 |
| 56 | #endif |
| 57 | #ifndef CONF_SERCOM_3_USART_ENABLE |
| 58 | #define CONF_SERCOM_3_USART_ENABLE 0 |
| 59 | #endif |
| 60 | #ifndef CONF_SERCOM_4_USART_ENABLE |
| 61 | #define CONF_SERCOM_4_USART_ENABLE 0 |
| 62 | #endif |
| 63 | #ifndef CONF_SERCOM_5_USART_ENABLE |
| 64 | #define CONF_SERCOM_5_USART_ENABLE 0 |
| 65 | #endif |
| 66 | #ifndef CONF_SERCOM_6_USART_ENABLE |
| 67 | #define CONF_SERCOM_6_USART_ENABLE 0 |
| 68 | #endif |
| 69 | #ifndef CONF_SERCOM_7_USART_ENABLE |
| 70 | #define CONF_SERCOM_7_USART_ENABLE 0 |
| 71 | #endif |
| 72 | |
| 73 | /** Amount of SERCOM that is used as USART. */ |
| 74 | #define SERCOM_USART_AMOUNT \ |
| 75 | (CONF_SERCOM_0_USART_ENABLE + CONF_SERCOM_1_USART_ENABLE + CONF_SERCOM_2_USART_ENABLE + CONF_SERCOM_3_USART_ENABLE \ |
| 76 | + CONF_SERCOM_4_USART_ENABLE + CONF_SERCOM_5_USART_ENABLE + CONF_SERCOM_6_USART_ENABLE \ |
| 77 | + CONF_SERCOM_7_USART_ENABLE) |
| 78 | |
| 79 | /** |
| 80 | * \brief Macro is used to fill usart configuration structure based on |
| 81 | * its number |
| 82 | * |
| 83 | * \param[in] n The number of structures |
| 84 | */ |
| 85 | #define SERCOM_CONFIGURATION(n) \ |
| 86 | { \ |
| 87 | n, \ |
| 88 | SERCOM_USART_CTRLA_MODE(CONF_SERCOM_##n##_USART_MODE) \ |
| 89 | | (CONF_SERCOM_##n##_USART_RUNSTDBY << SERCOM_USART_CTRLA_RUNSTDBY_Pos) \ |
| 90 | | (CONF_SERCOM_##n##_USART_IBON << SERCOM_USART_CTRLA_IBON_Pos) \ |
| 91 | | (CONF_SERCOM_##n##_USART_TXINV << SERCOM_USART_CTRLA_TXINV_Pos) \ |
| 92 | | (CONF_SERCOM_##n##_USART_RXINV << SERCOM_USART_CTRLA_RXINV_Pos) \ |
| 93 | | SERCOM_USART_CTRLA_SAMPR(CONF_SERCOM_##n##_USART_SAMPR) \ |
| 94 | | SERCOM_USART_CTRLA_TXPO(CONF_SERCOM_##n##_USART_TXPO) \ |
| 95 | | SERCOM_USART_CTRLA_RXPO(CONF_SERCOM_##n##_USART_RXPO) \ |
| 96 | | SERCOM_USART_CTRLA_SAMPA(CONF_SERCOM_##n##_USART_SAMPA) \ |
| 97 | | SERCOM_USART_CTRLA_FORM(CONF_SERCOM_##n##_USART_FORM) \ |
| 98 | | (CONF_SERCOM_##n##_USART_CMODE << SERCOM_USART_CTRLA_CMODE_Pos) \ |
| 99 | | (CONF_SERCOM_##n##_USART_CPOL << SERCOM_USART_CTRLA_CPOL_Pos) \ |
| 100 | | (CONF_SERCOM_##n##_USART_DORD << SERCOM_USART_CTRLA_DORD_Pos), \ |
| 101 | SERCOM_USART_CTRLB_CHSIZE(CONF_SERCOM_##n##_USART_CHSIZE) \ |
| 102 | | (CONF_SERCOM_##n##_USART_SBMODE << SERCOM_USART_CTRLB_SBMODE_Pos) \ |
| 103 | | (CONF_SERCOM_##n##_USART_CLODEN << SERCOM_USART_CTRLB_COLDEN_Pos) \ |
| 104 | | (CONF_SERCOM_##n##_USART_SFDE << SERCOM_USART_CTRLB_SFDE_Pos) \ |
| 105 | | (CONF_SERCOM_##n##_USART_ENC << SERCOM_USART_CTRLB_ENC_Pos) \ |
| 106 | | (CONF_SERCOM_##n##_USART_PMODE << SERCOM_USART_CTRLB_PMODE_Pos) \ |
| 107 | | (CONF_SERCOM_##n##_USART_TXEN << SERCOM_USART_CTRLB_TXEN_Pos) \ |
| 108 | | (CONF_SERCOM_##n##_USART_RXEN << SERCOM_USART_CTRLB_RXEN_Pos), \ |
| 109 | SERCOM_USART_CTRLC_GTIME(CONF_SERCOM_##n##_USART_GTIME) \ |
| 110 | | (CONF_SERCOM_##n##_USART_DSNACK << SERCOM_USART_CTRLC_DSNACK_Pos) \ |
| 111 | | (CONF_SERCOM_##n##_USART_INACK << SERCOM_USART_CTRLC_INACK_Pos) \ |
| 112 | | SERCOM_USART_CTRLC_MAXITER(CONF_SERCOM_##n##_USART_MAXITER), \ |
| 113 | (uint16_t)(CONF_SERCOM_##n##_USART_BAUD_RATE), CONF_SERCOM_##n##_USART_FRACTIONAL, \ |
| 114 | CONF_SERCOM_##n##_USART_RECEIVE_PULSE_LENGTH, CONF_SERCOM_##n##_USART_DEBUG_STOP_MODE, \ |
| 115 | } |
| 116 | |
| 117 | /** |
| 118 | * \brief SERCOM USART configuration type |
| 119 | */ |
| 120 | struct usart_configuration { |
| 121 | uint8_t number; |
| 122 | hri_sercomusart_ctrla_reg_t ctrl_a; |
| 123 | hri_sercomusart_ctrlb_reg_t ctrl_b; |
| 124 | hri_sercomusart_ctrlc_reg_t ctrl_c; |
| 125 | hri_sercomusart_baud_reg_t baud; |
| 126 | uint8_t fractional; |
| 127 | hri_sercomusart_rxpl_reg_t rxpl; |
| 128 | hri_sercomusart_dbgctrl_reg_t debug_ctrl; |
| 129 | }; |
| 130 | |
| 131 | #if SERCOM_USART_AMOUNT < 1 |
| 132 | /** Dummy array to pass compiling. */ |
| 133 | static struct usart_configuration _usarts[1] = {{0}}; |
| 134 | #else |
| 135 | /** |
| 136 | * \brief Array of SERCOM USART configurations |
| 137 | */ |
| 138 | static struct usart_configuration _usarts[] = { |
| 139 | #if CONF_SERCOM_0_USART_ENABLE == 1 |
| 140 | SERCOM_CONFIGURATION(0), |
| 141 | #endif |
| 142 | #if CONF_SERCOM_1_USART_ENABLE == 1 |
| 143 | SERCOM_CONFIGURATION(1), |
| 144 | #endif |
| 145 | #if CONF_SERCOM_2_USART_ENABLE == 1 |
| 146 | SERCOM_CONFIGURATION(2), |
| 147 | #endif |
| 148 | #if CONF_SERCOM_3_USART_ENABLE == 1 |
| 149 | SERCOM_CONFIGURATION(3), |
| 150 | #endif |
| 151 | #if CONF_SERCOM_4_USART_ENABLE == 1 |
| 152 | SERCOM_CONFIGURATION(4), |
| 153 | #endif |
| 154 | #if CONF_SERCOM_5_USART_ENABLE == 1 |
| 155 | SERCOM_CONFIGURATION(5), |
| 156 | #endif |
| 157 | #if CONF_SERCOM_6_USART_ENABLE == 1 |
| 158 | SERCOM_CONFIGURATION(6), |
| 159 | #endif |
| 160 | #if CONF_SERCOM_7_USART_ENABLE == 1 |
| 161 | SERCOM_CONFIGURATION(7), |
| 162 | #endif |
| 163 | }; |
| 164 | #endif |
| 165 | |
Kévin Redon | 1f8ecef | 2019-01-31 13:36:12 +0100 | [diff] [blame] | 166 | static struct _usart_async_device *_sercom0_dev = NULL; |
| 167 | |
| 168 | static struct _usart_async_device *_sercom1_dev = NULL; |
| 169 | |
| 170 | static struct _usart_async_device *_sercom2_dev = NULL; |
| 171 | |
| 172 | static struct _usart_async_device *_sercom3_dev = NULL; |
| 173 | |
| 174 | static struct _usart_async_device *_sercom4_dev = NULL; |
| 175 | |
| 176 | static struct _usart_async_device *_sercom5_dev = NULL; |
| 177 | |
| 178 | static struct _usart_async_device *_sercom6_dev = NULL; |
| 179 | |
Kévin Redon | ba3a2fa | 2019-03-07 15:52:27 +0100 | [diff] [blame] | 180 | static struct _usart_async_device *_sercom7_dev = NULL; |
| 181 | |
Kévin Redon | 4cd3f7d | 2019-01-24 17:57:13 +0100 | [diff] [blame] | 182 | static uint8_t _get_sercom_index(const void *const hw); |
| 183 | static uint8_t _sercom_get_irq_num(const void *const hw); |
| 184 | static void _sercom_init_irq_param(const void *const hw, void *dev); |
| 185 | static uint8_t _sercom_get_hardware_index(const void *const hw); |
| 186 | |
| 187 | static int32_t _usart_init(void *const hw); |
| 188 | static inline void _usart_deinit(void *const hw); |
| 189 | static uint16_t _usart_calculate_baud_rate(const uint32_t baud, const uint32_t clock_rate, const uint8_t samples, |
| 190 | const enum usart_baud_rate_mode mode, const uint8_t fraction); |
| 191 | static void _usart_set_baud_rate(void *const hw, const uint32_t baud_rate); |
| 192 | static void _usart_set_data_order(void *const hw, const enum usart_data_order order); |
| 193 | static void _usart_set_mode(void *const hw, const enum usart_mode mode); |
| 194 | static void _usart_set_parity(void *const hw, const enum usart_parity parity); |
| 195 | static void _usart_set_stop_bits(void *const hw, const enum usart_stop_bits stop_bits); |
| 196 | static void _usart_set_character_size(void *const hw, const enum usart_character_size size); |
| 197 | |
| 198 | /** |
| 199 | * \brief Initialize synchronous SERCOM USART |
| 200 | */ |
| 201 | int32_t _usart_sync_init(struct _usart_sync_device *const device, void *const hw) |
| 202 | { |
| 203 | ASSERT(device); |
| 204 | |
| 205 | device->hw = hw; |
| 206 | |
| 207 | return _usart_init(hw); |
| 208 | } |
| 209 | |
| 210 | /** |
| 211 | * \brief Initialize asynchronous SERCOM USART |
| 212 | */ |
| 213 | int32_t _usart_async_init(struct _usart_async_device *const device, void *const hw) |
| 214 | { |
| 215 | int32_t init_status; |
| 216 | |
| 217 | ASSERT(device); |
| 218 | |
| 219 | init_status = _usart_init(hw); |
| 220 | if (init_status) { |
| 221 | return init_status; |
| 222 | } |
| 223 | device->hw = hw; |
| 224 | _sercom_init_irq_param(hw, (void *)device); |
| 225 | uint8_t irq = _sercom_get_irq_num(hw); |
| 226 | for (uint32_t i = 0; i < 4; i++) { |
| 227 | NVIC_DisableIRQ((IRQn_Type)irq); |
| 228 | NVIC_ClearPendingIRQ((IRQn_Type)irq); |
| 229 | NVIC_EnableIRQ((IRQn_Type)irq); |
| 230 | irq++; |
| 231 | } |
| 232 | return ERR_NONE; |
| 233 | } |
| 234 | |
| 235 | /** |
| 236 | * \brief De-initialize SERCOM USART |
| 237 | */ |
| 238 | void _usart_sync_deinit(struct _usart_sync_device *const device) |
| 239 | { |
| 240 | _usart_deinit(device->hw); |
| 241 | } |
| 242 | |
| 243 | /** |
| 244 | * \brief De-initialize SERCOM USART |
| 245 | */ |
| 246 | void _usart_async_deinit(struct _usart_async_device *const device) |
| 247 | { |
| 248 | NVIC_DisableIRQ((IRQn_Type)_sercom_get_irq_num(device->hw)); |
| 249 | _usart_deinit(device->hw); |
| 250 | } |
| 251 | |
| 252 | /** |
| 253 | * \brief Calculate baud rate register value |
| 254 | */ |
| 255 | uint16_t _usart_sync_calculate_baud_rate(const uint32_t baud, const uint32_t clock_rate, const uint8_t samples, |
| 256 | const enum usart_baud_rate_mode mode, const uint8_t fraction) |
| 257 | { |
| 258 | return _usart_calculate_baud_rate(baud, clock_rate, samples, mode, fraction); |
| 259 | } |
| 260 | |
| 261 | /** |
| 262 | * \brief Calculate baud rate register value |
| 263 | */ |
| 264 | uint16_t _usart_async_calculate_baud_rate(const uint32_t baud, const uint32_t clock_rate, const uint8_t samples, |
| 265 | const enum usart_baud_rate_mode mode, const uint8_t fraction) |
| 266 | { |
| 267 | return _usart_calculate_baud_rate(baud, clock_rate, samples, mode, fraction); |
| 268 | } |
| 269 | |
| 270 | /** |
| 271 | * \brief Enable SERCOM module |
| 272 | */ |
| 273 | void _usart_sync_enable(struct _usart_sync_device *const device) |
| 274 | { |
| 275 | hri_sercomusart_set_CTRLA_ENABLE_bit(device->hw); |
| 276 | } |
| 277 | |
| 278 | /** |
| 279 | * \brief Enable SERCOM module |
| 280 | */ |
| 281 | void _usart_async_enable(struct _usart_async_device *const device) |
| 282 | { |
| 283 | hri_sercomusart_set_CTRLA_ENABLE_bit(device->hw); |
| 284 | } |
| 285 | |
| 286 | /** |
| 287 | * \brief Disable SERCOM module |
| 288 | */ |
| 289 | void _usart_sync_disable(struct _usart_sync_device *const device) |
| 290 | { |
| 291 | hri_sercomusart_clear_CTRLA_ENABLE_bit(device->hw); |
| 292 | } |
| 293 | |
| 294 | /** |
| 295 | * \brief Disable SERCOM module |
| 296 | */ |
| 297 | void _usart_async_disable(struct _usart_async_device *const device) |
| 298 | { |
| 299 | hri_sercomusart_clear_CTRLA_ENABLE_bit(device->hw); |
| 300 | } |
| 301 | |
| 302 | /** |
| 303 | * \brief Set baud rate |
| 304 | */ |
| 305 | void _usart_sync_set_baud_rate(struct _usart_sync_device *const device, const uint32_t baud_rate) |
| 306 | { |
| 307 | _usart_set_baud_rate(device->hw, baud_rate); |
| 308 | } |
| 309 | |
| 310 | /** |
| 311 | * \brief Set baud rate |
| 312 | */ |
| 313 | void _usart_async_set_baud_rate(struct _usart_async_device *const device, const uint32_t baud_rate) |
| 314 | { |
| 315 | _usart_set_baud_rate(device->hw, baud_rate); |
| 316 | } |
| 317 | |
| 318 | /** |
| 319 | * \brief Set data order |
| 320 | */ |
| 321 | void _usart_sync_set_data_order(struct _usart_sync_device *const device, const enum usart_data_order order) |
| 322 | { |
| 323 | _usart_set_data_order(device->hw, order); |
| 324 | } |
| 325 | |
| 326 | /** |
| 327 | * \brief Set data order |
| 328 | */ |
| 329 | void _usart_async_set_data_order(struct _usart_async_device *const device, const enum usart_data_order order) |
| 330 | { |
| 331 | _usart_set_data_order(device->hw, order); |
| 332 | } |
| 333 | |
| 334 | /** |
| 335 | * \brief Set mode |
| 336 | */ |
| 337 | void _usart_sync_set_mode(struct _usart_sync_device *const device, const enum usart_mode mode) |
| 338 | { |
| 339 | _usart_set_mode(device->hw, mode); |
| 340 | } |
| 341 | |
| 342 | /** |
| 343 | * \brief Set mode |
| 344 | */ |
| 345 | void _usart_async_set_mode(struct _usart_async_device *const device, const enum usart_mode mode) |
| 346 | { |
| 347 | _usart_set_mode(device->hw, mode); |
| 348 | } |
| 349 | |
| 350 | /** |
| 351 | * \brief Set parity |
| 352 | */ |
| 353 | void _usart_sync_set_parity(struct _usart_sync_device *const device, const enum usart_parity parity) |
| 354 | { |
| 355 | _usart_set_parity(device->hw, parity); |
| 356 | } |
| 357 | |
| 358 | /** |
| 359 | * \brief Set parity |
| 360 | */ |
| 361 | void _usart_async_set_parity(struct _usart_async_device *const device, const enum usart_parity parity) |
| 362 | { |
| 363 | _usart_set_parity(device->hw, parity); |
| 364 | } |
| 365 | |
| 366 | /** |
| 367 | * \brief Set stop bits mode |
| 368 | */ |
| 369 | void _usart_sync_set_stop_bits(struct _usart_sync_device *const device, const enum usart_stop_bits stop_bits) |
| 370 | { |
| 371 | _usart_set_stop_bits(device->hw, stop_bits); |
| 372 | } |
| 373 | |
| 374 | /** |
| 375 | * \brief Set stop bits mode |
| 376 | */ |
| 377 | void _usart_async_set_stop_bits(struct _usart_async_device *const device, const enum usart_stop_bits stop_bits) |
| 378 | { |
| 379 | _usart_set_stop_bits(device->hw, stop_bits); |
| 380 | } |
| 381 | |
| 382 | /** |
| 383 | * \brief Set character size |
| 384 | */ |
| 385 | void _usart_sync_set_character_size(struct _usart_sync_device *const device, const enum usart_character_size size) |
| 386 | { |
| 387 | _usart_set_character_size(device->hw, size); |
| 388 | } |
| 389 | |
| 390 | /** |
| 391 | * \brief Set character size |
| 392 | */ |
| 393 | void _usart_async_set_character_size(struct _usart_async_device *const device, const enum usart_character_size size) |
| 394 | { |
| 395 | _usart_set_character_size(device->hw, size); |
| 396 | } |
| 397 | |
| 398 | /** |
| 399 | * \brief Retrieve SERCOM usart status |
| 400 | */ |
| 401 | uint32_t _usart_sync_get_status(const struct _usart_sync_device *const device) |
| 402 | { |
| 403 | return hri_sercomusart_read_STATUS_reg(device->hw); |
| 404 | } |
| 405 | |
| 406 | /** |
| 407 | * \brief Retrieve SERCOM usart status |
| 408 | */ |
| 409 | uint32_t _usart_async_get_status(const struct _usart_async_device *const device) |
| 410 | { |
| 411 | return hri_sercomusart_read_STATUS_reg(device->hw); |
| 412 | } |
| 413 | |
| 414 | /** |
| 415 | * \brief Write a byte to the given SERCOM USART instance |
| 416 | */ |
| 417 | void _usart_sync_write_byte(struct _usart_sync_device *const device, uint8_t data) |
| 418 | { |
| 419 | hri_sercomusart_write_DATA_reg(device->hw, data); |
| 420 | } |
| 421 | |
| 422 | /** |
| 423 | * \brief Write a byte to the given SERCOM USART instance |
| 424 | */ |
| 425 | void _usart_async_write_byte(struct _usart_async_device *const device, uint8_t data) |
| 426 | { |
| 427 | hri_sercomusart_write_DATA_reg(device->hw, data); |
| 428 | } |
| 429 | |
| 430 | /** |
| 431 | * \brief Read a byte from the given SERCOM USART instance |
| 432 | */ |
| 433 | uint8_t _usart_sync_read_byte(const struct _usart_sync_device *const device) |
| 434 | { |
| 435 | return hri_sercomusart_read_DATA_reg(device->hw); |
| 436 | } |
| 437 | |
| 438 | /** |
| 439 | * \brief Check if USART is ready to send next byte |
| 440 | */ |
| 441 | bool _usart_sync_is_ready_to_send(const struct _usart_sync_device *const device) |
| 442 | { |
| 443 | return hri_sercomusart_get_interrupt_DRE_bit(device->hw); |
| 444 | } |
| 445 | |
| 446 | /** |
| 447 | * \brief Check if USART transmission complete |
| 448 | */ |
| 449 | bool _usart_sync_is_transmit_done(const struct _usart_sync_device *const device) |
| 450 | { |
| 451 | return hri_sercomusart_get_interrupt_TXC_bit(device->hw); |
| 452 | } |
| 453 | |
| 454 | /** |
| 455 | * \brief Check if USART is ready to send next byte |
| 456 | */ |
| 457 | bool _usart_async_is_byte_sent(const struct _usart_async_device *const device) |
| 458 | { |
| 459 | return hri_sercomusart_get_interrupt_DRE_bit(device->hw); |
| 460 | } |
| 461 | |
| 462 | /** |
| 463 | * \brief Check if there is data received by USART |
| 464 | */ |
| 465 | bool _usart_sync_is_byte_received(const struct _usart_sync_device *const device) |
| 466 | { |
| 467 | return hri_sercomusart_get_interrupt_RXC_bit(device->hw); |
| 468 | } |
| 469 | |
| 470 | /** |
| 471 | * \brief Set the state of flow control pins |
| 472 | */ |
| 473 | void _usart_sync_set_flow_control_state(struct _usart_sync_device *const device, |
| 474 | const union usart_flow_control_state state) |
| 475 | { |
| 476 | (void)device; |
| 477 | (void)state; |
| 478 | } |
| 479 | |
| 480 | /** |
| 481 | * \brief Set the state of flow control pins |
| 482 | */ |
| 483 | void _usart_async_set_flow_control_state(struct _usart_async_device *const device, |
| 484 | const union usart_flow_control_state state) |
| 485 | { |
| 486 | (void)device; |
| 487 | (void)state; |
| 488 | } |
| 489 | |
| 490 | /** |
| 491 | * \brief Retrieve the state of flow control pins |
| 492 | */ |
| 493 | union usart_flow_control_state _usart_sync_get_flow_control_state(const struct _usart_sync_device *const device) |
| 494 | { |
| 495 | (void)device; |
| 496 | union usart_flow_control_state state; |
| 497 | |
| 498 | state.value = 0; |
| 499 | state.bit.unavailable = 1; |
| 500 | return state; |
| 501 | } |
| 502 | |
| 503 | /** |
| 504 | * \brief Retrieve the state of flow control pins |
| 505 | */ |
| 506 | union usart_flow_control_state _usart_async_get_flow_control_state(const struct _usart_async_device *const device) |
| 507 | { |
| 508 | (void)device; |
| 509 | union usart_flow_control_state state; |
| 510 | |
| 511 | state.value = 0; |
| 512 | state.bit.unavailable = 1; |
| 513 | return state; |
| 514 | } |
| 515 | |
| 516 | /** |
| 517 | * \brief Enable data register empty interrupt |
| 518 | */ |
| 519 | void _usart_async_enable_byte_sent_irq(struct _usart_async_device *const device) |
| 520 | { |
| 521 | hri_sercomusart_set_INTEN_DRE_bit(device->hw); |
| 522 | } |
| 523 | |
| 524 | /** |
| 525 | * \brief Enable transmission complete interrupt |
| 526 | */ |
| 527 | void _usart_async_enable_tx_done_irq(struct _usart_async_device *const device) |
| 528 | { |
| 529 | hri_sercomusart_set_INTEN_TXC_bit(device->hw); |
| 530 | } |
| 531 | |
| 532 | /** |
| 533 | * \brief Retrieve ordinal number of the given sercom hardware instance |
| 534 | */ |
| 535 | static uint8_t _sercom_get_hardware_index(const void *const hw) |
| 536 | { |
| 537 | Sercom *const sercom_modules[] = SERCOM_INSTS; |
| 538 | /* Find index for SERCOM instance. */ |
| 539 | for (uint32_t i = 0; i < SERCOM_INST_NUM; i++) { |
| 540 | if ((uint32_t)hw == (uint32_t)sercom_modules[i]) { |
| 541 | return i; |
| 542 | } |
| 543 | } |
| 544 | return 0; |
| 545 | } |
| 546 | |
| 547 | /** |
| 548 | * \brief Retrieve ordinal number of the given SERCOM USART hardware instance |
| 549 | */ |
| 550 | uint8_t _usart_sync_get_hardware_index(const struct _usart_sync_device *const device) |
| 551 | { |
| 552 | return _sercom_get_hardware_index(device->hw); |
| 553 | } |
| 554 | |
| 555 | /** |
| 556 | * \brief Retrieve ordinal number of the given SERCOM USART hardware instance |
| 557 | */ |
| 558 | uint8_t _usart_async_get_hardware_index(const struct _usart_async_device *const device) |
| 559 | { |
| 560 | return _sercom_get_hardware_index(device->hw); |
| 561 | } |
| 562 | |
| 563 | /** |
| 564 | * \brief Enable/disable USART interrupt |
| 565 | */ |
| 566 | void _usart_async_set_irq_state(struct _usart_async_device *const device, const enum _usart_async_callback_type type, |
| 567 | const bool state) |
| 568 | { |
| 569 | ASSERT(device); |
| 570 | |
| 571 | if (USART_ASYNC_BYTE_SENT == type || USART_ASYNC_TX_DONE == type) { |
| 572 | hri_sercomusart_write_INTEN_DRE_bit(device->hw, state); |
| 573 | hri_sercomusart_write_INTEN_TXC_bit(device->hw, state); |
| 574 | } else if (USART_ASYNC_RX_DONE == type) { |
| 575 | hri_sercomusart_write_INTEN_RXC_bit(device->hw, state); |
| 576 | } else if (USART_ASYNC_ERROR == type) { |
| 577 | hri_sercomusart_write_INTEN_ERROR_bit(device->hw, state); |
| 578 | } |
| 579 | } |
| 580 | |
| 581 | /** |
Kévin Redon | ccbed0b | 2019-01-24 18:30:26 +0100 | [diff] [blame] | 582 | * \internal Sercom interrupt handler |
| 583 | * |
| 584 | * \param[in] p The pointer to interrupt parameter |
| 585 | */ |
| 586 | static void _sercom_usart_interrupt_handler(struct _usart_async_device *device) |
| 587 | { |
| 588 | void *hw = device->hw; |
| 589 | |
| 590 | if (hri_sercomusart_get_interrupt_DRE_bit(hw) && hri_sercomusart_get_INTEN_DRE_bit(hw)) { |
| 591 | hri_sercomusart_clear_INTEN_DRE_bit(hw); |
| 592 | device->usart_cb.tx_byte_sent(device); |
| 593 | } else if (hri_sercomusart_get_interrupt_TXC_bit(hw) && hri_sercomusart_get_INTEN_TXC_bit(hw)) { |
| 594 | hri_sercomusart_clear_INTEN_TXC_bit(hw); |
| 595 | device->usart_cb.tx_done_cb(device); |
| 596 | } else if (hri_sercomusart_get_interrupt_RXC_bit(hw)) { |
| 597 | if (hri_sercomusart_read_STATUS_reg(hw) |
| 598 | & (SERCOM_USART_STATUS_PERR | SERCOM_USART_STATUS_FERR | SERCOM_USART_STATUS_BUFOVF |
| 599 | | SERCOM_USART_STATUS_ISF | SERCOM_USART_STATUS_COLL)) { |
| 600 | hri_sercomusart_clear_STATUS_reg(hw, SERCOM_USART_STATUS_MASK); |
| 601 | return; |
| 602 | } |
| 603 | |
| 604 | device->usart_cb.rx_done_cb(device, hri_sercomusart_read_DATA_reg(hw)); |
| 605 | } else if (hri_sercomusart_get_interrupt_ERROR_bit(hw)) { |
| 606 | uint32_t status; |
| 607 | |
| 608 | hri_sercomusart_clear_interrupt_ERROR_bit(hw); |
| 609 | device->usart_cb.error_cb(device); |
| 610 | status = hri_sercomusart_read_STATUS_reg(hw); |
| 611 | hri_sercomusart_clear_STATUS_reg(hw, status); |
| 612 | } |
| 613 | } |
| 614 | |
| 615 | /** |
Kévin Redon | 4cd3f7d | 2019-01-24 17:57:13 +0100 | [diff] [blame] | 616 | * \internal Retrieve ordinal number of the given sercom hardware instance |
| 617 | * |
| 618 | * \param[in] hw The pointer to hardware instance |
| 619 | |
| 620 | * \return The ordinal number of the given sercom hardware instance |
| 621 | */ |
| 622 | static uint8_t _get_sercom_index(const void *const hw) |
| 623 | { |
| 624 | uint8_t sercom_offset = _sercom_get_hardware_index(hw); |
| 625 | uint8_t i; |
| 626 | |
| 627 | for (i = 0; i < ARRAY_SIZE(_usarts); i++) { |
| 628 | if (_usarts[i].number == sercom_offset) { |
| 629 | return i; |
| 630 | } |
| 631 | } |
| 632 | |
| 633 | ASSERT(false); |
| 634 | return 0; |
| 635 | } |
| 636 | |
| 637 | /** |
| 638 | * \brief Init irq param with the given sercom hardware instance |
| 639 | */ |
| 640 | static void _sercom_init_irq_param(const void *const hw, void *dev) |
| 641 | { |
Kévin Redon | ccbed0b | 2019-01-24 18:30:26 +0100 | [diff] [blame] | 642 | |
Kévin Redon | 1f8ecef | 2019-01-31 13:36:12 +0100 | [diff] [blame] | 643 | if (hw == SERCOM0) { |
| 644 | _sercom0_dev = (struct _usart_async_device *)dev; |
| 645 | } |
| 646 | |
| 647 | if (hw == SERCOM1) { |
| 648 | _sercom1_dev = (struct _usart_async_device *)dev; |
| 649 | } |
| 650 | |
| 651 | if (hw == SERCOM2) { |
| 652 | _sercom2_dev = (struct _usart_async_device *)dev; |
| 653 | } |
| 654 | |
| 655 | if (hw == SERCOM3) { |
| 656 | _sercom3_dev = (struct _usart_async_device *)dev; |
| 657 | } |
| 658 | |
| 659 | if (hw == SERCOM4) { |
| 660 | _sercom4_dev = (struct _usart_async_device *)dev; |
| 661 | } |
| 662 | |
| 663 | if (hw == SERCOM5) { |
| 664 | _sercom5_dev = (struct _usart_async_device *)dev; |
| 665 | } |
| 666 | |
| 667 | if (hw == SERCOM6) { |
| 668 | _sercom6_dev = (struct _usart_async_device *)dev; |
| 669 | } |
Kévin Redon | ba3a2fa | 2019-03-07 15:52:27 +0100 | [diff] [blame] | 670 | |
| 671 | if (hw == SERCOM7) { |
| 672 | _sercom7_dev = (struct _usart_async_device *)dev; |
| 673 | } |
Kévin Redon | 4cd3f7d | 2019-01-24 17:57:13 +0100 | [diff] [blame] | 674 | } |
| 675 | |
| 676 | /** |
| 677 | * \internal Initialize SERCOM USART |
| 678 | * |
| 679 | * \param[in] hw The pointer to hardware instance |
| 680 | * |
| 681 | * \return The status of initialization |
| 682 | */ |
| 683 | static int32_t _usart_init(void *const hw) |
| 684 | { |
| 685 | uint8_t i = _get_sercom_index(hw); |
| 686 | |
| 687 | if (!hri_sercomusart_is_syncing(hw, SERCOM_USART_SYNCBUSY_SWRST)) { |
| 688 | uint32_t mode = _usarts[i].ctrl_a & SERCOM_USART_CTRLA_MODE_Msk; |
| 689 | if (hri_sercomusart_get_CTRLA_reg(hw, SERCOM_USART_CTRLA_ENABLE)) { |
| 690 | hri_sercomusart_clear_CTRLA_ENABLE_bit(hw); |
| 691 | hri_sercomusart_wait_for_sync(hw, SERCOM_USART_SYNCBUSY_ENABLE); |
| 692 | } |
| 693 | hri_sercomusart_write_CTRLA_reg(hw, SERCOM_USART_CTRLA_SWRST | mode); |
| 694 | } |
| 695 | hri_sercomusart_wait_for_sync(hw, SERCOM_USART_SYNCBUSY_SWRST); |
| 696 | |
| 697 | hri_sercomusart_write_CTRLA_reg(hw, _usarts[i].ctrl_a); |
| 698 | hri_sercomusart_write_CTRLB_reg(hw, _usarts[i].ctrl_b); |
| 699 | hri_sercomusart_write_CTRLC_reg(hw, _usarts[i].ctrl_c); |
| 700 | if ((_usarts[i].ctrl_a & SERCOM_USART_CTRLA_SAMPR(0x1)) || (_usarts[i].ctrl_a & SERCOM_USART_CTRLA_SAMPR(0x3))) { |
| 701 | ((Sercom *)hw)->USART.BAUD.FRAC.BAUD = _usarts[i].baud; |
| 702 | ((Sercom *)hw)->USART.BAUD.FRAC.FP = _usarts[i].fractional; |
| 703 | } else { |
| 704 | hri_sercomusart_write_BAUD_reg(hw, _usarts[i].baud); |
| 705 | } |
| 706 | |
| 707 | hri_sercomusart_write_RXPL_reg(hw, _usarts[i].rxpl); |
| 708 | hri_sercomusart_write_DBGCTRL_reg(hw, _usarts[i].debug_ctrl); |
| 709 | |
| 710 | return ERR_NONE; |
| 711 | } |
| 712 | |
| 713 | /** |
| 714 | * \internal De-initialize SERCOM USART |
| 715 | * |
| 716 | * \param[in] hw The pointer to hardware instance |
| 717 | */ |
| 718 | static inline void _usart_deinit(void *const hw) |
| 719 | { |
| 720 | hri_sercomusart_clear_CTRLA_ENABLE_bit(hw); |
| 721 | hri_sercomusart_set_CTRLA_SWRST_bit(hw); |
| 722 | } |
| 723 | |
| 724 | /** |
| 725 | * \internal Calculate baud rate register value |
| 726 | * |
| 727 | * \param[in] baud Required baud rate |
| 728 | * \param[in] clock_rate SERCOM clock frequency |
| 729 | * \param[in] samples The number of samples |
| 730 | * \param[in] mode USART mode |
| 731 | * \param[in] fraction A fraction value |
| 732 | * |
| 733 | * \return Calculated baud rate register value |
| 734 | */ |
| 735 | static uint16_t _usart_calculate_baud_rate(const uint32_t baud, const uint32_t clock_rate, const uint8_t samples, |
| 736 | const enum usart_baud_rate_mode mode, const uint8_t fraction) |
| 737 | { |
| 738 | if (USART_BAUDRATE_ASYNCH_ARITHMETIC == mode) { |
| 739 | return 65536 - ((uint64_t)65536 * samples * baud) / clock_rate; |
| 740 | } |
| 741 | |
| 742 | if (USART_BAUDRATE_ASYNCH_FRACTIONAL == mode) { |
| 743 | return clock_rate / baud / samples + SERCOM_USART_BAUD_FRACFP_FP(fraction); |
| 744 | } |
| 745 | |
| 746 | if (USART_BAUDRATE_SYNCH == mode) { |
| 747 | return clock_rate / baud / 2 - 1; |
| 748 | } |
| 749 | |
| 750 | return 0; |
| 751 | } |
| 752 | |
| 753 | /** |
| 754 | * \internal Set baud rate |
| 755 | * |
| 756 | * \param[in] device The pointer to USART device instance |
| 757 | * \param[in] baud_rate A baud rate to set |
| 758 | */ |
| 759 | static void _usart_set_baud_rate(void *const hw, const uint32_t baud_rate) |
| 760 | { |
| 761 | bool enabled = hri_sercomusart_get_CTRLA_ENABLE_bit(hw); |
| 762 | |
| 763 | hri_sercomusart_clear_CTRLA_ENABLE_bit(hw); |
| 764 | |
| 765 | CRITICAL_SECTION_ENTER() |
| 766 | hri_sercomusart_wait_for_sync(hw, SERCOM_USART_SYNCBUSY_ENABLE); |
| 767 | hri_sercomusart_write_BAUD_reg(hw, baud_rate); |
| 768 | CRITICAL_SECTION_LEAVE() |
| 769 | |
| 770 | hri_sercomusart_write_CTRLA_ENABLE_bit(hw, enabled); |
| 771 | } |
| 772 | |
| 773 | /** |
| 774 | * \internal Set data order |
| 775 | * |
| 776 | * \param[in] device The pointer to USART device instance |
| 777 | * \param[in] order A data order to set |
| 778 | */ |
| 779 | static void _usart_set_data_order(void *const hw, const enum usart_data_order order) |
| 780 | { |
| 781 | bool enabled = hri_sercomusart_get_CTRLA_ENABLE_bit(hw); |
| 782 | |
| 783 | hri_sercomusart_clear_CTRLA_ENABLE_bit(hw); |
| 784 | |
| 785 | CRITICAL_SECTION_ENTER() |
| 786 | hri_sercomusart_wait_for_sync(hw, SERCOM_USART_SYNCBUSY_ENABLE); |
| 787 | hri_sercomusart_write_CTRLA_DORD_bit(hw, order); |
| 788 | CRITICAL_SECTION_LEAVE() |
| 789 | |
| 790 | hri_sercomusart_write_CTRLA_ENABLE_bit(hw, enabled); |
| 791 | } |
| 792 | |
| 793 | /** |
| 794 | * \internal Set mode |
| 795 | * |
| 796 | * \param[in] device The pointer to USART device instance |
| 797 | * \param[in] mode A mode to set |
| 798 | */ |
| 799 | static void _usart_set_mode(void *const hw, const enum usart_mode mode) |
| 800 | { |
| 801 | bool enabled = hri_sercomusart_get_CTRLA_ENABLE_bit(hw); |
| 802 | |
| 803 | hri_sercomusart_clear_CTRLA_ENABLE_bit(hw); |
| 804 | |
| 805 | CRITICAL_SECTION_ENTER() |
| 806 | hri_sercomusart_wait_for_sync(hw, SERCOM_USART_SYNCBUSY_ENABLE); |
| 807 | hri_sercomusart_write_CTRLA_CMODE_bit(hw, mode); |
| 808 | CRITICAL_SECTION_LEAVE() |
| 809 | |
| 810 | hri_sercomusart_write_CTRLA_ENABLE_bit(hw, enabled); |
| 811 | } |
| 812 | |
| 813 | /** |
| 814 | * \internal Set parity |
| 815 | * |
| 816 | * \param[in] device The pointer to USART device instance |
| 817 | * \param[in] parity A parity to set |
| 818 | */ |
| 819 | static void _usart_set_parity(void *const hw, const enum usart_parity parity) |
| 820 | { |
| 821 | bool enabled = hri_sercomusart_get_CTRLA_ENABLE_bit(hw); |
| 822 | |
| 823 | hri_sercomusart_clear_CTRLA_ENABLE_bit(hw); |
| 824 | |
| 825 | CRITICAL_SECTION_ENTER() |
| 826 | hri_sercomusart_wait_for_sync(hw, SERCOM_USART_SYNCBUSY_ENABLE); |
| 827 | |
| 828 | if (USART_PARITY_NONE != parity) { |
| 829 | hri_sercomusart_set_CTRLA_FORM_bf(hw, 1); |
| 830 | } else { |
| 831 | hri_sercomusart_clear_CTRLA_FORM_bf(hw, 1); |
| 832 | } |
| 833 | |
| 834 | hri_sercomusart_write_CTRLB_PMODE_bit(hw, parity); |
| 835 | CRITICAL_SECTION_LEAVE() |
| 836 | |
| 837 | hri_sercomusart_write_CTRLA_ENABLE_bit(hw, enabled); |
| 838 | } |
| 839 | |
| 840 | /** |
| 841 | * \internal Set stop bits mode |
| 842 | * |
| 843 | * \param[in] device The pointer to USART device instance |
| 844 | * \param[in] stop_bits A stop bits mode to set |
| 845 | */ |
| 846 | static void _usart_set_stop_bits(void *const hw, const enum usart_stop_bits stop_bits) |
| 847 | { |
| 848 | bool enabled = hri_sercomusart_get_CTRLA_ENABLE_bit(hw); |
| 849 | |
| 850 | hri_sercomusart_clear_CTRLA_ENABLE_bit(hw); |
| 851 | |
| 852 | CRITICAL_SECTION_ENTER() |
| 853 | hri_sercomusart_wait_for_sync(hw, SERCOM_USART_SYNCBUSY_ENABLE); |
| 854 | hri_sercomusart_write_CTRLB_SBMODE_bit(hw, stop_bits); |
| 855 | CRITICAL_SECTION_LEAVE() |
| 856 | |
| 857 | hri_sercomusart_write_CTRLA_ENABLE_bit(hw, enabled); |
| 858 | } |
| 859 | |
| 860 | /** |
| 861 | * \internal Set character size |
| 862 | * |
| 863 | * \param[in] device The pointer to USART device instance |
| 864 | * \param[in] size A character size to set |
| 865 | */ |
| 866 | static void _usart_set_character_size(void *const hw, const enum usart_character_size size) |
| 867 | { |
| 868 | bool enabled = hri_sercomusart_get_CTRLA_ENABLE_bit(hw); |
| 869 | |
| 870 | hri_sercomusart_clear_CTRLA_ENABLE_bit(hw); |
| 871 | |
| 872 | CRITICAL_SECTION_ENTER() |
| 873 | hri_sercomusart_wait_for_sync(hw, SERCOM_USART_SYNCBUSY_ENABLE); |
| 874 | hri_sercomusart_write_CTRLB_CHSIZE_bf(hw, size); |
| 875 | CRITICAL_SECTION_LEAVE() |
| 876 | |
| 877 | if (enabled) { |
| 878 | hri_sercomusart_set_CTRLA_ENABLE_bit(hw); |
| 879 | } |
| 880 | } |
| 881 | |
| 882 | /* Sercom I2C implementation */ |
| 883 | |
| 884 | #ifndef CONF_SERCOM_0_I2CM_ENABLE |
| 885 | #define CONF_SERCOM_0_I2CM_ENABLE 0 |
| 886 | #endif |
| 887 | #ifndef CONF_SERCOM_1_I2CM_ENABLE |
| 888 | #define CONF_SERCOM_1_I2CM_ENABLE 0 |
| 889 | #endif |
| 890 | #ifndef CONF_SERCOM_2_I2CM_ENABLE |
| 891 | #define CONF_SERCOM_2_I2CM_ENABLE 0 |
| 892 | #endif |
| 893 | #ifndef CONF_SERCOM_3_I2CM_ENABLE |
| 894 | #define CONF_SERCOM_3_I2CM_ENABLE 0 |
| 895 | #endif |
| 896 | #ifndef CONF_SERCOM_4_I2CM_ENABLE |
| 897 | #define CONF_SERCOM_4_I2CM_ENABLE 0 |
| 898 | #endif |
| 899 | #ifndef CONF_SERCOM_5_I2CM_ENABLE |
| 900 | #define CONF_SERCOM_5_I2CM_ENABLE 0 |
| 901 | #endif |
| 902 | #ifndef CONF_SERCOM_6_I2CM_ENABLE |
| 903 | #define CONF_SERCOM_6_I2CM_ENABLE 0 |
| 904 | #endif |
| 905 | #ifndef CONF_SERCOM_7_I2CM_ENABLE |
| 906 | #define CONF_SERCOM_7_I2CM_ENABLE 0 |
| 907 | #endif |
| 908 | |
| 909 | /** Amount of SERCOM that is used as I2C Master. */ |
| 910 | #define SERCOM_I2CM_AMOUNT \ |
| 911 | (CONF_SERCOM_0_I2CM_ENABLE + CONF_SERCOM_1_I2CM_ENABLE + CONF_SERCOM_2_I2CM_ENABLE + CONF_SERCOM_3_I2CM_ENABLE \ |
| 912 | + CONF_SERCOM_4_I2CM_ENABLE + CONF_SERCOM_5_I2CM_ENABLE + CONF_SERCOM_6_I2CM_ENABLE + CONF_SERCOM_7_I2CM_ENABLE) |
| 913 | |
| 914 | /** |
| 915 | * \brief Macro is used to fill i2cm configuration structure based on |
| 916 | * its number |
| 917 | * |
| 918 | * \param[in] n The number of structures |
| 919 | */ |
| 920 | #define I2CM_CONFIGURATION(n) \ |
| 921 | { \ |
| 922 | (n), \ |
| 923 | (SERCOM_I2CM_CTRLA_MODE_I2C_MASTER) | (CONF_SERCOM_##n##_I2CM_RUNSTDBY << SERCOM_I2CM_CTRLA_RUNSTDBY_Pos) \ |
| 924 | | (CONF_SERCOM_##n##_I2CM_SPEED << SERCOM_I2CM_CTRLA_SPEED_Pos) \ |
| 925 | | (CONF_SERCOM_##n##_I2CM_MEXTTOEN << SERCOM_I2CM_CTRLA_MEXTTOEN_Pos) \ |
| 926 | | (CONF_SERCOM_##n##_I2CM_SEXTTOEN << SERCOM_I2CM_CTRLA_SEXTTOEN_Pos) \ |
| 927 | | (CONF_SERCOM_##n##_I2CM_INACTOUT << SERCOM_I2CM_CTRLA_INACTOUT_Pos) \ |
| 928 | | (CONF_SERCOM_##n##_I2CM_LOWTOUT << SERCOM_I2CM_CTRLA_LOWTOUTEN_Pos) \ |
| 929 | | (CONF_SERCOM_##n##_I2CM_SDAHOLD << SERCOM_I2CM_CTRLA_SDAHOLD_Pos), \ |
| 930 | SERCOM_I2CM_CTRLB_SMEN, (uint32_t)(CONF_SERCOM_##n##_I2CM_BAUD_RATE), \ |
| 931 | CONF_SERCOM_##n##_I2CM_DEBUG_STOP_MODE, CONF_SERCOM_##n##_I2CM_TRISE, CONF_GCLK_SERCOM##n##_CORE_FREQUENCY \ |
| 932 | } |
| 933 | |
| 934 | #define ERROR_FLAG (1 << 7) |
| 935 | #define SB_FLAG (1 << 1) |
| 936 | #define MB_FLAG (1 << 0) |
| 937 | |
| 938 | #define CMD_STOP 0x3 |
| 939 | #define I2C_IDLE 0x1 |
| 940 | #define I2C_SM 0x0 |
| 941 | #define I2C_FM 0x1 |
| 942 | #define I2C_HS 0x2 |
| 943 | #define TEN_ADDR_FRAME 0x78 |
| 944 | #define TEN_ADDR_MASK 0x3ff |
| 945 | #define SEVEN_ADDR_MASK 0x7f |
| 946 | |
| 947 | /** |
| 948 | * \brief SERCOM I2CM configuration type |
| 949 | */ |
| 950 | struct i2cm_configuration { |
| 951 | uint8_t number; |
| 952 | hri_sercomi2cm_ctrla_reg_t ctrl_a; |
| 953 | hri_sercomi2cm_ctrlb_reg_t ctrl_b; |
| 954 | hri_sercomi2cm_baud_reg_t baud; |
| 955 | hri_sercomi2cm_dbgctrl_reg_t dbgctrl; |
| 956 | uint16_t trise; |
| 957 | uint32_t clk; /* SERCOM peripheral clock frequency */ |
| 958 | }; |
| 959 | |
| 960 | static inline void _i2c_m_enable_implementation(void *hw); |
| 961 | static int32_t _i2c_m_sync_init_impl(struct _i2c_m_service *const service, void *const hw); |
| 962 | |
| 963 | #if SERCOM_I2CM_AMOUNT < 1 |
| 964 | /** Dummy array to pass compiling. */ |
| 965 | static struct i2cm_configuration _i2cms[1] = {{0}}; |
| 966 | #else |
| 967 | /** |
| 968 | * \brief Array of SERCOM I2CM configurations |
| 969 | */ |
| 970 | static struct i2cm_configuration _i2cms[] = { |
| 971 | #if CONF_SERCOM_0_I2CM_ENABLE == 1 |
| 972 | I2CM_CONFIGURATION(0), |
| 973 | #endif |
| 974 | #if CONF_SERCOM_1_I2CM_ENABLE == 1 |
| 975 | I2CM_CONFIGURATION(1), |
| 976 | #endif |
| 977 | #if CONF_SERCOM_2_I2CM_ENABLE == 1 |
| 978 | I2CM_CONFIGURATION(2), |
| 979 | #endif |
| 980 | #if CONF_SERCOM_3_I2CM_ENABLE == 1 |
| 981 | I2CM_CONFIGURATION(3), |
| 982 | #endif |
| 983 | #if CONF_SERCOM_4_I2CM_ENABLE == 1 |
| 984 | I2CM_CONFIGURATION(4), |
| 985 | #endif |
| 986 | #if CONF_SERCOM_5_I2CM_ENABLE == 1 |
| 987 | I2CM_CONFIGURATION(5), |
| 988 | #endif |
| 989 | #if CONF_SERCOM_6_I2CM_ENABLE == 1 |
| 990 | I2CM_CONFIGURATION(6), |
| 991 | #endif |
| 992 | #if CONF_SERCOM_7_I2CM_ENABLE == 1 |
| 993 | I2CM_CONFIGURATION(7), |
| 994 | #endif |
| 995 | }; |
| 996 | #endif |
| 997 | |
| 998 | /** |
| 999 | * \internal Retrieve ordinal number of the given sercom hardware instance |
| 1000 | * |
| 1001 | * \param[in] hw The pointer to hardware instance |
| 1002 | |
| 1003 | * \return The ordinal number of the given sercom hardware instance |
| 1004 | */ |
| 1005 | static int8_t _get_i2cm_index(const void *const hw) |
| 1006 | { |
| 1007 | uint8_t sercom_offset = _sercom_get_hardware_index(hw); |
| 1008 | uint8_t i; |
| 1009 | |
| 1010 | for (i = 0; i < ARRAY_SIZE(_i2cms); i++) { |
| 1011 | if (_i2cms[i].number == sercom_offset) { |
| 1012 | return i; |
| 1013 | } |
| 1014 | } |
| 1015 | |
| 1016 | ASSERT(false); |
| 1017 | return -1; |
| 1018 | } |
| 1019 | |
| 1020 | static inline void _sercom_i2c_send_stop(void *const hw) |
| 1021 | { |
| 1022 | hri_sercomi2cm_set_CTRLB_CMD_bf(hw, CMD_STOP); |
| 1023 | } |
| 1024 | |
| 1025 | /** |
| 1026 | * \brief SERCOM I2CM analyze hardware status and transfer next byte |
| 1027 | */ |
| 1028 | static inline int32_t _sercom_i2c_sync_analyse_flags(void *const hw, uint32_t flags, struct _i2c_m_msg *const msg) |
| 1029 | { |
| 1030 | int sclsm = hri_sercomi2cm_get_CTRLA_SCLSM_bit(hw); |
| 1031 | uint16_t status = hri_sercomi2cm_read_STATUS_reg(hw); |
| 1032 | |
| 1033 | if (flags & MB_FLAG) { |
| 1034 | /* tx error */ |
| 1035 | if (status & SERCOM_I2CM_STATUS_ARBLOST) { |
| 1036 | hri_sercomi2cm_clear_interrupt_MB_bit(hw); |
| 1037 | msg->flags |= I2C_M_FAIL; |
| 1038 | msg->flags &= ~I2C_M_BUSY; |
| 1039 | |
| 1040 | if (status & SERCOM_I2CM_STATUS_BUSERR) { |
| 1041 | return I2C_ERR_BUS; |
| 1042 | } |
| 1043 | |
| 1044 | return I2C_ERR_BAD_ADDRESS; |
| 1045 | } else { |
| 1046 | if (status & SERCOM_I2CM_STATUS_RXNACK) { |
| 1047 | |
| 1048 | /* Slave rejects to receive more data */ |
| 1049 | if (msg->len > 0) { |
| 1050 | msg->flags |= I2C_M_FAIL; |
| 1051 | } |
| 1052 | |
| 1053 | if (msg->flags & I2C_M_STOP) { |
| 1054 | _sercom_i2c_send_stop(hw); |
| 1055 | } |
| 1056 | |
| 1057 | msg->flags &= ~I2C_M_BUSY; |
| 1058 | |
| 1059 | return I2C_NACK; |
| 1060 | } |
| 1061 | |
| 1062 | if (msg->flags & I2C_M_TEN) { |
| 1063 | hri_sercomi2cm_write_ADDR_reg(hw, |
| 1064 | ((((msg->addr & TEN_ADDR_MASK) >> 8) | TEN_ADDR_FRAME) << 1) | I2C_M_RD |
| 1065 | | (hri_sercomi2cm_read_ADDR_reg(hw) & SERCOM_I2CM_ADDR_HS)); |
| 1066 | msg->flags &= ~I2C_M_TEN; |
| 1067 | |
| 1068 | return I2C_OK; |
| 1069 | } |
| 1070 | |
| 1071 | if (msg->len == 0) { |
| 1072 | if (msg->flags & I2C_M_STOP) { |
| 1073 | _sercom_i2c_send_stop(hw); |
| 1074 | } |
| 1075 | |
| 1076 | msg->flags &= ~I2C_M_BUSY; |
| 1077 | } else { |
| 1078 | hri_sercomi2cm_write_DATA_reg(hw, *msg->buffer); |
| 1079 | msg->buffer++; |
| 1080 | msg->len--; |
| 1081 | } |
| 1082 | |
| 1083 | return I2C_OK; |
| 1084 | } |
| 1085 | } else if (flags & SB_FLAG) { |
| 1086 | if ((msg->len) && !(status & SERCOM_I2CM_STATUS_RXNACK)) { |
| 1087 | msg->len--; |
| 1088 | |
| 1089 | /* last byte, send nack */ |
| 1090 | if ((msg->len == 0 && !sclsm) || (msg->len == 1 && sclsm)) { |
| 1091 | hri_sercomi2cm_set_CTRLB_ACKACT_bit(hw); |
| 1092 | } |
| 1093 | |
| 1094 | if (msg->len == 0) { |
| 1095 | if (msg->flags & I2C_M_STOP) { |
| 1096 | hri_sercomi2cm_clear_CTRLB_SMEN_bit(hw); |
| 1097 | _sercom_i2c_send_stop(hw); |
| 1098 | } |
| 1099 | |
| 1100 | msg->flags &= ~I2C_M_BUSY; |
| 1101 | } |
| 1102 | |
| 1103 | /* Accessing DATA.DATA auto-triggers I2C bus operations. |
| 1104 | * The operation performed depends on the state of |
| 1105 | * CTRLB.ACKACT, CTRLB.SMEN |
| 1106 | **/ |
| 1107 | *msg->buffer++ = hri_sercomi2cm_read_DATA_reg(hw); |
| 1108 | } else { |
| 1109 | hri_sercomi2cm_clear_interrupt_SB_bit(hw); |
| 1110 | return I2C_NACK; |
| 1111 | } |
| 1112 | |
| 1113 | hri_sercomi2cm_clear_interrupt_SB_bit(hw); |
| 1114 | } |
| 1115 | |
| 1116 | return I2C_OK; |
| 1117 | } |
| 1118 | |
| 1119 | /** |
| 1120 | * \brief Enable the i2c master module |
| 1121 | * |
| 1122 | * \param[in] i2c_dev The pointer to i2c device |
| 1123 | */ |
| 1124 | int32_t _i2c_m_async_enable(struct _i2c_m_async_device *const i2c_dev) |
| 1125 | { |
| 1126 | ASSERT(i2c_dev); |
| 1127 | |
| 1128 | _i2c_m_enable_implementation(i2c_dev->hw); |
| 1129 | |
| 1130 | return ERR_NONE; |
| 1131 | } |
| 1132 | |
| 1133 | /** |
| 1134 | * \brief Disable the i2c master module |
| 1135 | * |
| 1136 | * \param[in] i2c_dev The pointer to i2c device |
| 1137 | */ |
| 1138 | int32_t _i2c_m_async_disable(struct _i2c_m_async_device *const i2c_dev) |
| 1139 | { |
| 1140 | void *hw = i2c_dev->hw; |
| 1141 | |
| 1142 | ASSERT(i2c_dev); |
| 1143 | ASSERT(i2c_dev->hw); |
| 1144 | |
| 1145 | NVIC_DisableIRQ((IRQn_Type)_sercom_get_irq_num(hw)); |
| 1146 | hri_sercomi2cm_clear_CTRLA_ENABLE_bit(hw); |
| 1147 | |
| 1148 | return ERR_NONE; |
| 1149 | } |
| 1150 | |
| 1151 | /** |
| 1152 | * \brief Set baudrate of master |
| 1153 | * |
| 1154 | * \param[in] i2c_dev The pointer to i2c device |
| 1155 | * \param[in] clkrate The clock rate of i2c master, in KHz |
| 1156 | * \param[in] baudrate The baud rate desired for i2c master, in KHz |
| 1157 | */ |
| 1158 | int32_t _i2c_m_async_set_baudrate(struct _i2c_m_async_device *const i2c_dev, uint32_t clkrate, uint32_t baudrate) |
| 1159 | { |
| 1160 | uint32_t tmp; |
| 1161 | void * hw = i2c_dev->hw; |
| 1162 | |
| 1163 | if (hri_sercomi2cm_get_CTRLA_ENABLE_bit(hw)) { |
| 1164 | return ERR_DENIED; |
| 1165 | } |
| 1166 | |
| 1167 | tmp = _get_i2cm_index(hw); |
| 1168 | clkrate = _i2cms[tmp].clk / 1000; |
| 1169 | |
| 1170 | if (i2c_dev->service.mode == I2C_STANDARD_MODE) { |
| 1171 | tmp = (uint32_t)((clkrate - 10 * baudrate - baudrate * clkrate * (i2c_dev->service.trise * 0.000000001)) |
| 1172 | / (2 * baudrate)); |
| 1173 | hri_sercomi2cm_write_BAUD_BAUD_bf(hw, tmp); |
| 1174 | } else if (i2c_dev->service.mode == I2C_FASTMODE) { |
| 1175 | tmp = (uint32_t)((clkrate - 10 * baudrate - baudrate * clkrate * (i2c_dev->service.trise * 0.000000001)) |
| 1176 | / (2 * baudrate)); |
| 1177 | hri_sercomi2cm_write_BAUD_BAUD_bf(hw, tmp); |
| 1178 | } else if (i2c_dev->service.mode == I2C_HIGHSPEED_MODE) { |
| 1179 | tmp = (clkrate - 2 * baudrate) / (2 * baudrate); |
| 1180 | hri_sercomi2cm_write_BAUD_HSBAUD_bf(hw, tmp); |
| 1181 | } else { |
| 1182 | /* error baudrate */ |
| 1183 | return ERR_INVALID_ARG; |
| 1184 | } |
| 1185 | |
| 1186 | return ERR_NONE; |
| 1187 | } |
| 1188 | |
| 1189 | /** |
| 1190 | * \brief Retrieve IRQ number for the given hardware instance |
| 1191 | */ |
| 1192 | static uint8_t _sercom_get_irq_num(const void *const hw) |
| 1193 | { |
| 1194 | return SERCOM0_0_IRQn + (_sercom_get_hardware_index(hw) << 2); |
| 1195 | } |
| 1196 | |
| 1197 | /** |
| 1198 | * \brief Initialize sercom i2c module to use in async mode |
| 1199 | * |
| 1200 | * \param[in] i2c_dev The pointer to i2c device |
| 1201 | */ |
| 1202 | int32_t _i2c_m_async_init(struct _i2c_m_async_device *const i2c_dev, void *const hw) |
| 1203 | { |
| 1204 | int32_t init_status; |
| 1205 | |
| 1206 | ASSERT(i2c_dev); |
| 1207 | |
| 1208 | i2c_dev->hw = hw; |
| 1209 | |
| 1210 | init_status = _i2c_m_sync_init_impl(&i2c_dev->service, hw); |
| 1211 | if (init_status) { |
| 1212 | return init_status; |
| 1213 | } |
| 1214 | |
| 1215 | _sercom_init_irq_param(hw, (void *)i2c_dev); |
| 1216 | uint8_t irq = _sercom_get_irq_num(hw); |
| 1217 | for (uint32_t i = 0; i < 4; i++) { |
| 1218 | NVIC_DisableIRQ((IRQn_Type)irq); |
| 1219 | NVIC_ClearPendingIRQ((IRQn_Type)irq); |
| 1220 | NVIC_EnableIRQ((IRQn_Type)irq); |
| 1221 | irq++; |
| 1222 | } |
| 1223 | return ERR_NONE; |
| 1224 | } |
| 1225 | |
| 1226 | /** |
| 1227 | * \brief Deinitialize sercom i2c module |
| 1228 | * |
| 1229 | * \param[in] i2c_dev The pointer to i2c device |
| 1230 | */ |
| 1231 | int32_t _i2c_m_async_deinit(struct _i2c_m_async_device *const i2c_dev) |
| 1232 | { |
| 1233 | ASSERT(i2c_dev); |
| 1234 | |
| 1235 | hri_sercomi2cm_clear_CTRLA_ENABLE_bit(i2c_dev->hw); |
| 1236 | hri_sercomi2cm_set_CTRLA_SWRST_bit(i2c_dev->hw); |
| 1237 | |
| 1238 | return ERR_NONE; |
| 1239 | } |
| 1240 | |
| 1241 | /** |
| 1242 | * \brief Transfer the slave address to bus, which will start the transfer |
| 1243 | * |
| 1244 | * \param[in] i2c_dev The pointer to i2c device |
| 1245 | */ |
| 1246 | static int32_t _sercom_i2c_send_address(struct _i2c_m_async_device *const i2c_dev) |
| 1247 | { |
| 1248 | void * hw = i2c_dev->hw; |
| 1249 | struct _i2c_m_msg *msg = &i2c_dev->service.msg; |
| 1250 | int sclsm = hri_sercomi2cm_get_CTRLA_SCLSM_bit(hw); |
| 1251 | |
| 1252 | ASSERT(i2c_dev); |
| 1253 | |
| 1254 | if (msg->len == 1 && sclsm) { |
| 1255 | hri_sercomi2cm_set_CTRLB_ACKACT_bit(hw); |
| 1256 | } else { |
| 1257 | hri_sercomi2cm_clear_CTRLB_ACKACT_bit(hw); |
| 1258 | } |
| 1259 | |
| 1260 | /* ten bit address */ |
| 1261 | if (msg->addr & I2C_M_TEN) { |
| 1262 | if (msg->flags & I2C_M_RD) { |
| 1263 | msg->flags |= I2C_M_TEN; |
| 1264 | } |
| 1265 | |
| 1266 | hri_sercomi2cm_write_ADDR_reg(hw, |
| 1267 | ((msg->addr & TEN_ADDR_MASK) << 1) | SERCOM_I2CM_ADDR_TENBITEN |
| 1268 | | (hri_sercomi2cm_read_ADDR_reg(hw) & SERCOM_I2CM_ADDR_HS)); |
| 1269 | } else { |
| 1270 | hri_sercomi2cm_write_ADDR_reg(hw, |
| 1271 | ((msg->addr & SEVEN_ADDR_MASK) << 1) | (msg->flags & I2C_M_RD ? I2C_M_RD : 0x0) |
| 1272 | | (hri_sercomi2cm_read_ADDR_reg(hw) & SERCOM_I2CM_ADDR_HS)); |
| 1273 | } |
| 1274 | |
| 1275 | return ERR_NONE; |
| 1276 | } |
| 1277 | |
| 1278 | /** |
| 1279 | * \brief Transfer data specified by msg |
| 1280 | * |
| 1281 | * \param[in] i2c_dev The pointer to i2c device |
| 1282 | * \param[in] msg The pointer to i2c message |
| 1283 | * |
| 1284 | * \return Transfer status. |
| 1285 | * \retval 0 Transfer success |
| 1286 | * \retval <0 Transfer fail, return the error code |
| 1287 | */ |
| 1288 | int32_t _i2c_m_async_transfer(struct _i2c_m_async_device *i2c_dev, struct _i2c_m_msg *msg) |
| 1289 | { |
| 1290 | int ret; |
| 1291 | |
| 1292 | ASSERT(i2c_dev); |
| 1293 | ASSERT(i2c_dev->hw); |
| 1294 | ASSERT(msg); |
| 1295 | |
| 1296 | if (msg->len == 0) { |
| 1297 | return ERR_NONE; |
| 1298 | } |
| 1299 | |
| 1300 | if (i2c_dev->service.msg.flags & I2C_M_BUSY) { |
| 1301 | return ERR_BUSY; |
| 1302 | } |
| 1303 | |
| 1304 | msg->flags |= I2C_M_BUSY; |
| 1305 | i2c_dev->service.msg = *msg; |
| 1306 | hri_sercomi2cm_set_CTRLB_SMEN_bit(i2c_dev->hw); |
| 1307 | |
| 1308 | ret = _sercom_i2c_send_address(i2c_dev); |
| 1309 | |
| 1310 | if (ret) { |
| 1311 | i2c_dev->service.msg.flags &= ~I2C_M_BUSY; |
| 1312 | |
| 1313 | return ret; |
| 1314 | } |
| 1315 | |
| 1316 | return ERR_NONE; |
| 1317 | } |
| 1318 | |
| 1319 | /** |
| 1320 | * \brief Set callback to be called in interrupt handler |
| 1321 | * |
| 1322 | * \param[in] i2c_dev The pointer to master i2c device |
| 1323 | * \param[in] type The callback type |
| 1324 | * \param[in] func The callback function pointer |
| 1325 | */ |
| 1326 | int32_t _i2c_m_async_register_callback(struct _i2c_m_async_device *const i2c_dev, enum _i2c_m_async_callback_type type, |
| 1327 | FUNC_PTR func) |
| 1328 | { |
| 1329 | switch (type) { |
| 1330 | case I2C_M_ASYNC_DEVICE_ERROR: |
| 1331 | i2c_dev->cb.error = (_i2c_error_cb_t)func; |
| 1332 | break; |
| 1333 | case I2C_M_ASYNC_DEVICE_TX_COMPLETE: |
| 1334 | i2c_dev->cb.tx_complete = (_i2c_complete_cb_t)func; |
| 1335 | break; |
| 1336 | case I2C_M_ASYNC_DEVICE_RX_COMPLETE: |
| 1337 | i2c_dev->cb.rx_complete = (_i2c_complete_cb_t)func; |
| 1338 | break; |
| 1339 | default: |
| 1340 | /* error */ |
| 1341 | break; |
| 1342 | } |
| 1343 | |
| 1344 | return ERR_NONE; |
| 1345 | } |
| 1346 | |
| 1347 | /** |
| 1348 | * \brief Set stop condition on I2C |
| 1349 | * |
| 1350 | * \param i2c_dev Pointer to master i2c device |
| 1351 | * |
| 1352 | * \return Operation status |
| 1353 | * \retval I2C_OK Operation was successfull |
| 1354 | */ |
| 1355 | int32_t _i2c_m_async_send_stop(struct _i2c_m_async_device *const i2c_dev) |
| 1356 | { |
| 1357 | void *hw = i2c_dev->hw; |
| 1358 | |
| 1359 | _sercom_i2c_send_stop(hw); |
| 1360 | |
| 1361 | return I2C_OK; |
| 1362 | } |
| 1363 | |
| 1364 | /** |
| 1365 | * \brief Get number of bytes left in transfer buffer |
| 1366 | * |
| 1367 | * \param i2c_dev Pointer to i2c master device |
| 1368 | * |
| 1369 | * \return Bytes left in buffer |
| 1370 | * \retval =>0 Bytes left in buffer |
| 1371 | */ |
| 1372 | int32_t _i2c_m_async_get_bytes_left(struct _i2c_m_async_device *const i2c_dev) |
| 1373 | { |
| 1374 | if (i2c_dev->service.msg.flags & I2C_M_BUSY) { |
| 1375 | return i2c_dev->service.msg.len; |
| 1376 | } |
| 1377 | |
| 1378 | return 0; |
| 1379 | } |
| 1380 | |
| 1381 | /** |
| 1382 | * \brief Initialize sercom i2c module to use in sync mode |
| 1383 | * |
| 1384 | * \param[in] i2c_dev The pointer to i2c device |
| 1385 | */ |
| 1386 | int32_t _i2c_m_sync_init(struct _i2c_m_sync_device *const i2c_dev, void *const hw) |
| 1387 | { |
| 1388 | ASSERT(i2c_dev); |
| 1389 | |
| 1390 | i2c_dev->hw = hw; |
| 1391 | |
| 1392 | return _i2c_m_sync_init_impl(&i2c_dev->service, hw); |
| 1393 | } |
| 1394 | |
| 1395 | /** |
| 1396 | * \brief Deinitialize sercom i2c module |
| 1397 | * |
| 1398 | * \param[in] i2c_dev The pointer to i2c device |
| 1399 | */ |
| 1400 | int32_t _i2c_m_sync_deinit(struct _i2c_m_sync_device *const i2c_dev) |
| 1401 | { |
| 1402 | ASSERT(i2c_dev); |
| 1403 | |
| 1404 | hri_sercomi2cm_clear_CTRLA_ENABLE_bit(i2c_dev->hw); |
| 1405 | hri_sercomi2cm_set_CTRLA_SWRST_bit(i2c_dev->hw); |
| 1406 | |
| 1407 | return ERR_NONE; |
| 1408 | } |
| 1409 | |
| 1410 | /** |
| 1411 | * \brief Enable the i2c master module |
| 1412 | * |
| 1413 | * \param[in] i2c_dev The pointer to i2c device |
| 1414 | */ |
| 1415 | int32_t _i2c_m_sync_enable(struct _i2c_m_sync_device *const i2c_dev) |
| 1416 | { |
| 1417 | ASSERT(i2c_dev); |
| 1418 | |
| 1419 | _i2c_m_enable_implementation(i2c_dev->hw); |
| 1420 | |
| 1421 | return ERR_NONE; |
| 1422 | } |
| 1423 | |
| 1424 | /** |
| 1425 | * \brief Disable the i2c master module |
| 1426 | * |
| 1427 | * \param[in] i2c_dev The pointer to i2c device |
| 1428 | */ |
| 1429 | int32_t _i2c_m_sync_disable(struct _i2c_m_sync_device *const i2c_dev) |
| 1430 | { |
| 1431 | void *hw = i2c_dev->hw; |
| 1432 | |
| 1433 | ASSERT(i2c_dev); |
| 1434 | ASSERT(i2c_dev->hw); |
| 1435 | |
| 1436 | hri_sercomi2cm_clear_CTRLA_ENABLE_bit(hw); |
| 1437 | |
| 1438 | return ERR_NONE; |
| 1439 | } |
| 1440 | |
| 1441 | /** |
| 1442 | * \brief Set baudrate of master |
| 1443 | * |
| 1444 | * \param[in] i2c_dev The pointer to i2c device |
| 1445 | * \param[in] clkrate The clock rate of i2c master, in KHz |
| 1446 | * \param[in] baudrate The baud rate desired for i2c master, in KHz |
| 1447 | */ |
| 1448 | int32_t _i2c_m_sync_set_baudrate(struct _i2c_m_sync_device *const i2c_dev, uint32_t clkrate, uint32_t baudrate) |
| 1449 | { |
| 1450 | uint32_t tmp; |
| 1451 | void * hw = i2c_dev->hw; |
| 1452 | |
| 1453 | if (hri_sercomi2cm_get_CTRLA_ENABLE_bit(hw)) { |
| 1454 | return ERR_DENIED; |
| 1455 | } |
| 1456 | |
| 1457 | tmp = _get_i2cm_index(hw); |
| 1458 | clkrate = _i2cms[tmp].clk / 1000; |
| 1459 | |
| 1460 | if (i2c_dev->service.mode == I2C_STANDARD_MODE) { |
| 1461 | tmp = (uint32_t)((clkrate - 10 * baudrate - baudrate * clkrate * (i2c_dev->service.trise * 0.000000001)) |
| 1462 | / (2 * baudrate)); |
| 1463 | hri_sercomi2cm_write_BAUD_BAUD_bf(hw, tmp); |
| 1464 | } else if (i2c_dev->service.mode == I2C_FASTMODE) { |
| 1465 | tmp = (uint32_t)((clkrate - 10 * baudrate - baudrate * clkrate * (i2c_dev->service.trise * 0.000000001)) |
| 1466 | / (2 * baudrate)); |
| 1467 | hri_sercomi2cm_write_BAUD_BAUD_bf(hw, tmp); |
| 1468 | } else if (i2c_dev->service.mode == I2C_HIGHSPEED_MODE) { |
| 1469 | tmp = (clkrate - 2 * baudrate) / (2 * baudrate); |
| 1470 | hri_sercomi2cm_write_BAUD_HSBAUD_bf(hw, tmp); |
| 1471 | } else { |
| 1472 | /* error baudrate */ |
| 1473 | return ERR_INVALID_ARG; |
| 1474 | } |
| 1475 | |
| 1476 | return ERR_NONE; |
| 1477 | } |
| 1478 | |
| 1479 | /** |
| 1480 | * \brief Enable/disable I2C master interrupt |
| 1481 | */ |
| 1482 | void _i2c_m_async_set_irq_state(struct _i2c_m_async_device *const device, const enum _i2c_m_async_callback_type type, |
| 1483 | const bool state) |
| 1484 | { |
| 1485 | if (I2C_M_ASYNC_DEVICE_TX_COMPLETE == type || I2C_M_ASYNC_DEVICE_RX_COMPLETE == type) { |
| 1486 | hri_sercomi2cm_write_INTEN_SB_bit(device->hw, state); |
| 1487 | hri_sercomi2cm_write_INTEN_MB_bit(device->hw, state); |
| 1488 | } else if (I2C_M_ASYNC_DEVICE_ERROR == type) { |
| 1489 | hri_sercomi2cm_write_INTEN_ERROR_bit(device->hw, state); |
| 1490 | } |
| 1491 | } |
| 1492 | |
| 1493 | /** |
| 1494 | * \brief Wait for bus response |
| 1495 | * |
| 1496 | * \param[in] i2c_dev The pointer to i2c device |
| 1497 | * \param[in] flags Store the hardware response |
| 1498 | * |
| 1499 | * \return Bus response status. |
| 1500 | * \retval 0 Bus response status OK |
| 1501 | * \retval <0 Bus response fail |
| 1502 | */ |
| 1503 | inline static int32_t _sercom_i2c_sync_wait_bus(struct _i2c_m_sync_device *const i2c_dev, uint32_t *flags) |
| 1504 | { |
| 1505 | uint32_t timeout = 65535; |
| 1506 | void * hw = i2c_dev->hw; |
| 1507 | |
| 1508 | do { |
| 1509 | *flags = hri_sercomi2cm_read_INTFLAG_reg(hw); |
| 1510 | |
| 1511 | if (timeout-- == 0) { |
| 1512 | return I2C_ERR_BUS; |
| 1513 | } |
| 1514 | } while (!(*flags & MB_FLAG) && !(*flags & SB_FLAG)); |
| 1515 | |
| 1516 | return I2C_OK; |
| 1517 | } |
| 1518 | |
| 1519 | /** |
| 1520 | * \brief Send the slave address to bus, which will start the transfer |
| 1521 | * |
| 1522 | * \param[in] i2c_dev The pointer to i2c device |
| 1523 | */ |
| 1524 | static int32_t _sercom_i2c_sync_send_address(struct _i2c_m_sync_device *const i2c_dev) |
| 1525 | { |
| 1526 | void * hw = i2c_dev->hw; |
| 1527 | struct _i2c_m_msg *msg = &i2c_dev->service.msg; |
| 1528 | int sclsm = hri_sercomi2cm_get_CTRLA_SCLSM_bit(hw); |
| 1529 | uint32_t flags; |
| 1530 | |
| 1531 | ASSERT(i2c_dev); |
| 1532 | |
| 1533 | if (msg->len == 1 && sclsm) { |
| 1534 | hri_sercomi2cm_set_CTRLB_ACKACT_bit(hw); |
| 1535 | } else { |
| 1536 | hri_sercomi2cm_clear_CTRLB_ACKACT_bit(hw); |
| 1537 | } |
| 1538 | |
| 1539 | /* ten bit address */ |
| 1540 | if (msg->addr & I2C_M_TEN) { |
| 1541 | if (msg->flags & I2C_M_RD) { |
| 1542 | msg->flags |= I2C_M_TEN; |
| 1543 | } |
| 1544 | |
| 1545 | hri_sercomi2cm_write_ADDR_reg(hw, |
| 1546 | ((msg->addr & TEN_ADDR_MASK) << 1) | SERCOM_I2CM_ADDR_TENBITEN |
| 1547 | | (hri_sercomi2cm_read_ADDR_reg(hw) & SERCOM_I2CM_ADDR_HS)); |
| 1548 | } else { |
| 1549 | hri_sercomi2cm_write_ADDR_reg(hw, |
| 1550 | ((msg->addr & SEVEN_ADDR_MASK) << 1) | (msg->flags & I2C_M_RD ? I2C_M_RD : 0x0) |
| 1551 | | (hri_sercomi2cm_read_ADDR_reg(hw) & SERCOM_I2CM_ADDR_HS)); |
| 1552 | } |
| 1553 | |
| 1554 | _sercom_i2c_sync_wait_bus(i2c_dev, &flags); |
| 1555 | return _sercom_i2c_sync_analyse_flags(hw, flags, msg); |
| 1556 | } |
| 1557 | |
| 1558 | /** |
| 1559 | * \brief Transfer data specified by msg |
| 1560 | * |
| 1561 | * \param[in] i2c_dev The pointer to i2c device |
| 1562 | * \param[in] msg The pointer to i2c message |
| 1563 | * |
| 1564 | * \return Transfer status. |
| 1565 | * \retval 0 Transfer success |
| 1566 | * \retval <0 Transfer fail or partial fail, return the error code |
| 1567 | */ |
| 1568 | int32_t _i2c_m_sync_transfer(struct _i2c_m_sync_device *const i2c_dev, struct _i2c_m_msg *msg) |
| 1569 | { |
| 1570 | uint32_t flags; |
| 1571 | int ret; |
| 1572 | void * hw = i2c_dev->hw; |
| 1573 | |
| 1574 | ASSERT(i2c_dev); |
| 1575 | ASSERT(i2c_dev->hw); |
| 1576 | ASSERT(msg); |
| 1577 | |
| 1578 | if (i2c_dev->service.msg.flags & I2C_M_BUSY) { |
| 1579 | return I2C_ERR_BUSY; |
| 1580 | } |
| 1581 | |
| 1582 | msg->flags |= I2C_M_BUSY; |
| 1583 | i2c_dev->service.msg = *msg; |
| 1584 | hri_sercomi2cm_set_CTRLB_SMEN_bit(hw); |
| 1585 | |
| 1586 | ret = _sercom_i2c_sync_send_address(i2c_dev); |
| 1587 | |
| 1588 | if (ret) { |
| 1589 | i2c_dev->service.msg.flags &= ~I2C_M_BUSY; |
| 1590 | |
| 1591 | return ret; |
| 1592 | } |
| 1593 | |
| 1594 | while (i2c_dev->service.msg.flags & I2C_M_BUSY) { |
| 1595 | ret = _sercom_i2c_sync_wait_bus(i2c_dev, &flags); |
| 1596 | |
| 1597 | if (ret) { |
| 1598 | if (msg->flags & I2C_M_STOP) { |
| 1599 | _sercom_i2c_send_stop(hw); |
| 1600 | } |
| 1601 | |
| 1602 | i2c_dev->service.msg.flags &= ~I2C_M_BUSY; |
| 1603 | |
| 1604 | return ret; |
| 1605 | } |
| 1606 | |
| 1607 | ret = _sercom_i2c_sync_analyse_flags(hw, flags, &i2c_dev->service.msg); |
| 1608 | } |
| 1609 | |
| 1610 | return ret; |
| 1611 | } |
| 1612 | |
| 1613 | int32_t _i2c_m_sync_send_stop(struct _i2c_m_sync_device *const i2c_dev) |
| 1614 | { |
| 1615 | void *hw = i2c_dev->hw; |
| 1616 | |
| 1617 | _sercom_i2c_send_stop(hw); |
| 1618 | |
| 1619 | return I2C_OK; |
| 1620 | } |
| 1621 | |
| 1622 | static inline void _i2c_m_enable_implementation(void *const hw) |
| 1623 | { |
| 1624 | int timeout = 65535; |
| 1625 | |
| 1626 | ASSERT(hw); |
| 1627 | |
| 1628 | /* Enable interrupts */ |
| 1629 | hri_sercomi2cm_set_CTRLA_ENABLE_bit(hw); |
| 1630 | |
| 1631 | while (hri_sercomi2cm_read_STATUS_BUSSTATE_bf(hw) != I2C_IDLE) { |
| 1632 | timeout--; |
| 1633 | |
| 1634 | if (timeout <= 0) { |
| 1635 | hri_sercomi2cm_clear_STATUS_reg(hw, SERCOM_I2CM_STATUS_BUSSTATE(I2C_IDLE)); |
| 1636 | } |
| 1637 | } |
| 1638 | } |
| 1639 | |
| 1640 | static int32_t _i2c_m_sync_init_impl(struct _i2c_m_service *const service, void *const hw) |
| 1641 | { |
| 1642 | uint8_t i = _get_i2cm_index(hw); |
| 1643 | |
| 1644 | if (!hri_sercomi2cm_is_syncing(hw, SERCOM_I2CM_SYNCBUSY_SWRST)) { |
| 1645 | uint32_t mode = _i2cms[i].ctrl_a & SERCOM_I2CM_CTRLA_MODE_Msk; |
| 1646 | if (hri_sercomi2cm_get_CTRLA_reg(hw, SERCOM_I2CM_CTRLA_ENABLE)) { |
| 1647 | hri_sercomi2cm_clear_CTRLA_ENABLE_bit(hw); |
| 1648 | hri_sercomi2cm_wait_for_sync(hw, SERCOM_I2CM_SYNCBUSY_ENABLE); |
| 1649 | } |
| 1650 | hri_sercomi2cm_write_CTRLA_reg(hw, SERCOM_I2CM_CTRLA_SWRST | mode); |
| 1651 | } |
| 1652 | hri_sercomi2cm_wait_for_sync(hw, SERCOM_I2CM_SYNCBUSY_SWRST); |
| 1653 | |
| 1654 | hri_sercomi2cm_write_CTRLA_reg(hw, _i2cms[i].ctrl_a); |
| 1655 | hri_sercomi2cm_write_CTRLB_reg(hw, _i2cms[i].ctrl_b); |
| 1656 | hri_sercomi2cm_write_BAUD_reg(hw, _i2cms[i].baud); |
| 1657 | |
| 1658 | service->mode = (_i2cms[i].ctrl_a & SERCOM_I2CM_CTRLA_SPEED_Msk) >> SERCOM_I2CM_CTRLA_SPEED_Pos; |
| 1659 | hri_sercomi2cm_write_ADDR_HS_bit(hw, service->mode < I2C_HS ? 0 : 1); |
| 1660 | |
| 1661 | service->trise = _i2cms[i].trise; |
| 1662 | |
| 1663 | return ERR_NONE; |
| 1664 | } |
| 1665 | |
| 1666 | /* SERCOM I2C slave */ |
| 1667 | |
| 1668 | #ifndef CONF_SERCOM_0_I2CS_ENABLE |
| 1669 | #define CONF_SERCOM_0_I2CS_ENABLE 0 |
| 1670 | #endif |
| 1671 | #ifndef CONF_SERCOM_1_I2CS_ENABLE |
| 1672 | #define CONF_SERCOM_1_I2CS_ENABLE 0 |
| 1673 | #endif |
| 1674 | #ifndef CONF_SERCOM_2_I2CS_ENABLE |
| 1675 | #define CONF_SERCOM_2_I2CS_ENABLE 0 |
| 1676 | #endif |
| 1677 | #ifndef CONF_SERCOM_3_I2CS_ENABLE |
| 1678 | #define CONF_SERCOM_3_I2CS_ENABLE 0 |
| 1679 | #endif |
| 1680 | #ifndef CONF_SERCOM_4_I2CS_ENABLE |
| 1681 | #define CONF_SERCOM_4_I2CS_ENABLE 0 |
| 1682 | #endif |
| 1683 | #ifndef CONF_SERCOM_5_I2CS_ENABLE |
| 1684 | #define CONF_SERCOM_5_I2CS_ENABLE 0 |
| 1685 | #endif |
| 1686 | #ifndef CONF_SERCOM_6_I2CS_ENABLE |
| 1687 | #define CONF_SERCOM_6_I2CS_ENABLE 0 |
| 1688 | #endif |
| 1689 | #ifndef CONF_SERCOM_7_I2CS_ENABLE |
| 1690 | #define CONF_SERCOM_7_I2CS_ENABLE 0 |
| 1691 | #endif |
| 1692 | |
| 1693 | /** Amount of SERCOM that is used as I2C Slave. */ |
| 1694 | #define SERCOM_I2CS_AMOUNT \ |
| 1695 | (CONF_SERCOM_0_I2CS_ENABLE + CONF_SERCOM_1_I2CS_ENABLE + CONF_SERCOM_2_I2CS_ENABLE + CONF_SERCOM_3_I2CS_ENABLE \ |
| 1696 | + CONF_SERCOM_4_I2CS_ENABLE + CONF_SERCOM_5_I2CS_ENABLE + CONF_SERCOM_6_I2CS_ENABLE + CONF_SERCOM_7_I2CS_ENABLE) |
| 1697 | |
| 1698 | /** |
| 1699 | * \brief Macro is used to fill I2C slave configuration structure based on |
| 1700 | * its number |
| 1701 | * |
| 1702 | * \param[in] n The number of structures |
| 1703 | */ |
| 1704 | #define I2CS_CONFIGURATION(n) \ |
| 1705 | { \ |
| 1706 | n, \ |
| 1707 | SERCOM_I2CM_CTRLA_MODE_I2C_SLAVE | (CONF_SERCOM_##n##_I2CS_RUNSTDBY << SERCOM_I2CS_CTRLA_RUNSTDBY_Pos) \ |
| 1708 | | SERCOM_I2CS_CTRLA_SDAHOLD(CONF_SERCOM_##n##_I2CS_SDAHOLD) \ |
| 1709 | | (CONF_SERCOM_##n##_I2CS_SEXTTOEN << SERCOM_I2CS_CTRLA_SEXTTOEN_Pos) \ |
| 1710 | | (CONF_SERCOM_##n##_I2CS_SPEED << SERCOM_I2CS_CTRLA_SPEED_Pos) \ |
| 1711 | | (CONF_SERCOM_##n##_I2CS_SCLSM << SERCOM_I2CS_CTRLA_SCLSM_Pos) \ |
| 1712 | | (CONF_SERCOM_##n##_I2CS_LOWTOUT << SERCOM_I2CS_CTRLA_LOWTOUTEN_Pos), \ |
| 1713 | SERCOM_I2CS_CTRLB_SMEN | SERCOM_I2CS_CTRLB_AACKEN | SERCOM_I2CS_CTRLB_AMODE(CONF_SERCOM_##n##_I2CS_AMODE), \ |
| 1714 | (CONF_SERCOM_##n##_I2CS_GENCEN << SERCOM_I2CS_ADDR_GENCEN_Pos) \ |
| 1715 | | SERCOM_I2CS_ADDR_ADDR(CONF_SERCOM_##n##_I2CS_ADDRESS) \ |
| 1716 | | (CONF_SERCOM_##n##_I2CS_TENBITEN << SERCOM_I2CS_ADDR_TENBITEN_Pos) \ |
| 1717 | | SERCOM_I2CS_ADDR_ADDRMASK(CONF_SERCOM_##n##_I2CS_ADDRESS_MASK) \ |
| 1718 | } |
| 1719 | |
| 1720 | /** |
| 1721 | * \brief Macro to check 10-bit addressing |
| 1722 | */ |
| 1723 | #define I2CS_7BIT_ADDRESSING_MASK 0x7F |
| 1724 | |
| 1725 | static int32_t _i2c_s_init(void *const hw); |
| 1726 | static int8_t _get_i2c_s_index(const void *const hw); |
| 1727 | static inline void _i2c_s_deinit(void *const hw); |
| 1728 | static int32_t _i2c_s_set_address(void *const hw, const uint16_t address); |
| 1729 | |
| 1730 | /** |
| 1731 | * \brief SERCOM I2C slave configuration type |
| 1732 | */ |
| 1733 | struct i2cs_configuration { |
| 1734 | uint8_t number; |
| 1735 | hri_sercomi2cs_ctrla_reg_t ctrl_a; |
| 1736 | hri_sercomi2cs_ctrlb_reg_t ctrl_b; |
| 1737 | hri_sercomi2cs_addr_reg_t address; |
| 1738 | }; |
| 1739 | |
| 1740 | #if SERCOM_I2CS_AMOUNT < 1 |
| 1741 | /** Dummy array for compiling. */ |
| 1742 | static struct i2cs_configuration _i2css[1] = {{0}}; |
| 1743 | #else |
| 1744 | /** |
| 1745 | * \brief Array of SERCOM I2C slave configurations |
| 1746 | */ |
| 1747 | static struct i2cs_configuration _i2css[] = { |
| 1748 | #if CONF_SERCOM_0_I2CS_ENABLE == 1 |
| 1749 | I2CS_CONFIGURATION(0), |
| 1750 | #endif |
| 1751 | #if CONF_SERCOM_1_I2CS_ENABLE == 1 |
| 1752 | I2CS_CONFIGURATION(1), |
| 1753 | #endif |
| 1754 | #if CONF_SERCOM_2_I2CS_ENABLE == 1 |
| 1755 | I2CS_CONFIGURATION(2), |
| 1756 | #endif |
| 1757 | #if CONF_SERCOM_3_I2CS_ENABLE == 1 |
| 1758 | I2CS_CONFIGURATION(3), |
| 1759 | #endif |
| 1760 | #if CONF_SERCOM_4_I2CS_ENABLE == 1 |
| 1761 | I2CS_CONFIGURATION(4), |
| 1762 | #endif |
| 1763 | #if CONF_SERCOM_5_I2CS_ENABLE == 1 |
| 1764 | I2CS_CONFIGURATION(5), |
| 1765 | #endif |
| 1766 | }; |
| 1767 | #endif |
| 1768 | |
| 1769 | /** |
| 1770 | * \brief Initialize synchronous I2C slave |
| 1771 | */ |
| 1772 | int32_t _i2c_s_sync_init(struct _i2c_s_sync_device *const device, void *const hw) |
| 1773 | { |
| 1774 | int32_t status; |
| 1775 | |
| 1776 | ASSERT(device); |
| 1777 | |
| 1778 | status = _i2c_s_init(hw); |
| 1779 | if (status) { |
| 1780 | return status; |
| 1781 | } |
| 1782 | device->hw = hw; |
| 1783 | |
| 1784 | return ERR_NONE; |
| 1785 | } |
| 1786 | |
| 1787 | /** |
| 1788 | * \brief Initialize asynchronous I2C slave |
| 1789 | */ |
| 1790 | int32_t _i2c_s_async_init(struct _i2c_s_async_device *const device, void *const hw) |
| 1791 | { |
| 1792 | int32_t init_status; |
| 1793 | |
| 1794 | ASSERT(device); |
| 1795 | |
| 1796 | init_status = _i2c_s_init(hw); |
| 1797 | if (init_status) { |
| 1798 | return init_status; |
| 1799 | } |
| 1800 | |
| 1801 | device->hw = hw; |
| 1802 | _sercom_init_irq_param(hw, (void *)device); |
| 1803 | uint8_t irq = _sercom_get_irq_num(hw); |
| 1804 | for (uint32_t i = 0; i < 4; i++) { |
| 1805 | NVIC_DisableIRQ((IRQn_Type)irq); |
| 1806 | NVIC_ClearPendingIRQ((IRQn_Type)irq); |
| 1807 | NVIC_EnableIRQ((IRQn_Type)irq); |
| 1808 | irq++; |
| 1809 | } |
| 1810 | |
| 1811 | return ERR_NONE; |
| 1812 | } |
| 1813 | |
| 1814 | /** |
| 1815 | * \brief Deinitialize synchronous I2C |
| 1816 | */ |
| 1817 | int32_t _i2c_s_sync_deinit(struct _i2c_s_sync_device *const device) |
| 1818 | { |
| 1819 | _i2c_s_deinit(device->hw); |
| 1820 | |
| 1821 | return ERR_NONE; |
| 1822 | } |
| 1823 | |
| 1824 | /** |
| 1825 | * \brief Deinitialize asynchronous I2C |
| 1826 | */ |
| 1827 | int32_t _i2c_s_async_deinit(struct _i2c_s_async_device *const device) |
| 1828 | { |
| 1829 | NVIC_DisableIRQ((IRQn_Type)_sercom_get_irq_num(device->hw)); |
| 1830 | _i2c_s_deinit(device->hw); |
| 1831 | |
| 1832 | return ERR_NONE; |
| 1833 | } |
| 1834 | |
| 1835 | /** |
| 1836 | * \brief Enable I2C module |
| 1837 | */ |
| 1838 | int32_t _i2c_s_sync_enable(struct _i2c_s_sync_device *const device) |
| 1839 | { |
| 1840 | hri_sercomi2cs_set_CTRLA_ENABLE_bit(device->hw); |
| 1841 | |
| 1842 | return ERR_NONE; |
| 1843 | } |
| 1844 | |
| 1845 | /** |
| 1846 | * \brief Enable I2C module |
| 1847 | */ |
| 1848 | int32_t _i2c_s_async_enable(struct _i2c_s_async_device *const device) |
| 1849 | { |
| 1850 | hri_sercomi2cs_set_CTRLA_ENABLE_bit(device->hw); |
| 1851 | |
| 1852 | return ERR_NONE; |
| 1853 | } |
| 1854 | |
| 1855 | /** |
| 1856 | * \brief Disable I2C module |
| 1857 | */ |
| 1858 | int32_t _i2c_s_sync_disable(struct _i2c_s_sync_device *const device) |
| 1859 | { |
| 1860 | hri_sercomi2cs_clear_CTRLA_ENABLE_bit(device->hw); |
| 1861 | |
| 1862 | return ERR_NONE; |
| 1863 | } |
| 1864 | |
| 1865 | /** |
| 1866 | * \brief Disable I2C module |
| 1867 | */ |
| 1868 | int32_t _i2c_s_async_disable(struct _i2c_s_async_device *const device) |
| 1869 | { |
| 1870 | hri_sercomi2cs_clear_CTRLA_ENABLE_bit(device->hw); |
| 1871 | |
| 1872 | return ERR_NONE; |
| 1873 | } |
| 1874 | |
| 1875 | /** |
| 1876 | * \brief Check if 10-bit addressing mode is on |
| 1877 | */ |
| 1878 | int32_t _i2c_s_sync_is_10bit_addressing_on(const struct _i2c_s_sync_device *const device) |
| 1879 | { |
| 1880 | return hri_sercomi2cs_get_ADDR_TENBITEN_bit(device->hw); |
| 1881 | } |
| 1882 | |
| 1883 | /** |
| 1884 | * \brief Check if 10-bit addressing mode is on |
| 1885 | */ |
| 1886 | int32_t _i2c_s_async_is_10bit_addressing_on(const struct _i2c_s_async_device *const device) |
| 1887 | { |
| 1888 | return hri_sercomi2cs_get_ADDR_TENBITEN_bit(device->hw); |
| 1889 | } |
| 1890 | |
| 1891 | /** |
| 1892 | * \brief Set I2C slave address |
| 1893 | */ |
| 1894 | int32_t _i2c_s_sync_set_address(struct _i2c_s_sync_device *const device, const uint16_t address) |
| 1895 | { |
| 1896 | return _i2c_s_set_address(device->hw, address); |
| 1897 | } |
| 1898 | |
| 1899 | /** |
| 1900 | * \brief Set I2C slave address |
| 1901 | */ |
| 1902 | int32_t _i2c_s_async_set_address(struct _i2c_s_async_device *const device, const uint16_t address) |
| 1903 | { |
| 1904 | return _i2c_s_set_address(device->hw, address); |
| 1905 | } |
| 1906 | |
| 1907 | /** |
| 1908 | * \brief Write a byte to the given I2C instance |
| 1909 | */ |
| 1910 | void _i2c_s_sync_write_byte(struct _i2c_s_sync_device *const device, const uint8_t data) |
| 1911 | { |
| 1912 | hri_sercomi2cs_write_DATA_reg(device->hw, data); |
| 1913 | } |
| 1914 | |
| 1915 | /** |
| 1916 | * \brief Write a byte to the given I2C instance |
| 1917 | */ |
| 1918 | void _i2c_s_async_write_byte(struct _i2c_s_async_device *const device, const uint8_t data) |
| 1919 | { |
| 1920 | hri_sercomi2cs_write_DATA_reg(device->hw, data); |
| 1921 | } |
| 1922 | |
| 1923 | /** |
| 1924 | * \brief Read a byte from the given I2C instance |
| 1925 | */ |
| 1926 | uint8_t _i2c_s_sync_read_byte(const struct _i2c_s_sync_device *const device) |
| 1927 | { |
| 1928 | return hri_sercomi2cs_read_DATA_reg(device->hw); |
| 1929 | } |
| 1930 | |
| 1931 | /** |
| 1932 | * \brief Check if I2C is ready to send next byt |
| 1933 | */ |
| 1934 | bool _i2c_s_sync_is_byte_sent(const struct _i2c_s_sync_device *const device) |
| 1935 | { |
| 1936 | return hri_sercomi2cs_get_interrupt_DRDY_bit(device->hw); |
| 1937 | } |
| 1938 | |
| 1939 | /** |
| 1940 | * \brief Check if there is data received by I2C |
| 1941 | */ |
| 1942 | bool _i2c_s_sync_is_byte_received(const struct _i2c_s_sync_device *const device) |
| 1943 | { |
| 1944 | return hri_sercomi2cs_get_interrupt_DRDY_bit(device->hw); |
| 1945 | } |
| 1946 | |
| 1947 | /** |
| 1948 | * \brief Retrieve I2C slave status |
| 1949 | */ |
| 1950 | i2c_s_status_t _i2c_s_sync_get_status(const struct _i2c_s_sync_device *const device) |
| 1951 | { |
| 1952 | return hri_sercomi2cs_read_STATUS_reg(device->hw); |
| 1953 | } |
| 1954 | |
| 1955 | /** |
| 1956 | * \brief Clear the Data Ready interrupt flag |
| 1957 | */ |
| 1958 | int32_t _i2c_s_sync_clear_data_ready_flag(const struct _i2c_s_sync_device *const device) |
| 1959 | { |
| 1960 | hri_sercomi2cs_clear_INTFLAG_DRDY_bit(device->hw); |
| 1961 | |
| 1962 | return ERR_NONE; |
| 1963 | } |
| 1964 | |
| 1965 | /** |
| 1966 | * \brief Retrieve I2C slave status |
| 1967 | */ |
| 1968 | i2c_s_status_t _i2c_s_async_get_status(const struct _i2c_s_async_device *const device) |
| 1969 | { |
| 1970 | return hri_sercomi2cs_read_STATUS_reg(device->hw); |
| 1971 | } |
| 1972 | |
| 1973 | /** |
| 1974 | * \brief Abort data transmission |
| 1975 | */ |
| 1976 | int32_t _i2c_s_async_abort_transmission(const struct _i2c_s_async_device *const device) |
| 1977 | { |
| 1978 | hri_sercomi2cs_clear_INTEN_DRDY_bit(device->hw); |
| 1979 | |
| 1980 | return ERR_NONE; |
| 1981 | } |
| 1982 | |
| 1983 | /** |
| 1984 | * \brief Enable/disable I2C slave interrupt |
| 1985 | */ |
| 1986 | int32_t _i2c_s_async_set_irq_state(struct _i2c_s_async_device *const device, const enum _i2c_s_async_callback_type type, |
| 1987 | const bool state) |
| 1988 | { |
| 1989 | ASSERT(device); |
| 1990 | |
| 1991 | if (I2C_S_DEVICE_TX == type || I2C_S_DEVICE_RX_COMPLETE == type) { |
| 1992 | hri_sercomi2cs_write_INTEN_DRDY_bit(device->hw, state); |
| 1993 | } else if (I2C_S_DEVICE_ERROR == type) { |
| 1994 | hri_sercomi2cs_write_INTEN_ERROR_bit(device->hw, state); |
| 1995 | } |
| 1996 | |
| 1997 | return ERR_NONE; |
| 1998 | } |
| 1999 | |
| 2000 | /** |
| 2001 | * \internal Initalize i2c slave hardware |
| 2002 | * |
| 2003 | * \param[in] p The pointer to hardware instance |
| 2004 | * |
| 2005 | *\ return status of initialization |
| 2006 | */ |
| 2007 | static int32_t _i2c_s_init(void *const hw) |
| 2008 | { |
| 2009 | int8_t i = _get_i2c_s_index(hw); |
| 2010 | if (i == -1) { |
| 2011 | return ERR_INVALID_ARG; |
| 2012 | } |
| 2013 | |
| 2014 | if (!hri_sercomi2cs_is_syncing(hw, SERCOM_I2CS_CTRLA_SWRST)) { |
| 2015 | uint32_t mode = _i2css[i].ctrl_a & SERCOM_I2CS_CTRLA_MODE_Msk; |
| 2016 | if (hri_sercomi2cs_get_CTRLA_reg(hw, SERCOM_I2CS_CTRLA_ENABLE)) { |
| 2017 | hri_sercomi2cs_clear_CTRLA_ENABLE_bit(hw); |
| 2018 | hri_sercomi2cs_wait_for_sync(hw, SERCOM_I2CS_SYNCBUSY_ENABLE); |
| 2019 | } |
| 2020 | hri_sercomi2cs_write_CTRLA_reg(hw, SERCOM_I2CS_CTRLA_SWRST | mode); |
| 2021 | } |
| 2022 | hri_sercomi2cs_wait_for_sync(hw, SERCOM_I2CS_SYNCBUSY_SWRST); |
| 2023 | |
| 2024 | hri_sercomi2cs_write_CTRLA_reg(hw, _i2css[i].ctrl_a); |
| 2025 | hri_sercomi2cs_write_CTRLB_reg(hw, _i2css[i].ctrl_b); |
| 2026 | hri_sercomi2cs_write_ADDR_reg(hw, _i2css[i].address); |
| 2027 | |
| 2028 | return ERR_NONE; |
| 2029 | } |
| 2030 | |
| 2031 | /** |
| 2032 | * \internal Retrieve ordinal number of the given sercom hardware instance |
| 2033 | * |
| 2034 | * \param[in] hw The pointer to hardware instance |
| 2035 | * |
| 2036 | * \return The ordinal number of the given sercom hardware instance |
| 2037 | */ |
| 2038 | static int8_t _get_i2c_s_index(const void *const hw) |
| 2039 | { |
| 2040 | uint8_t sercom_offset = _sercom_get_hardware_index(hw); |
| 2041 | uint8_t i; |
| 2042 | |
| 2043 | for (i = 0; i < ARRAY_SIZE(_i2css); i++) { |
| 2044 | if (_i2css[i].number == sercom_offset) { |
| 2045 | return i; |
| 2046 | } |
| 2047 | } |
| 2048 | |
| 2049 | ASSERT(false); |
| 2050 | return -1; |
| 2051 | } |
| 2052 | |
| 2053 | /** |
| 2054 | * \internal De-initialize i2c slave |
| 2055 | * |
| 2056 | * \param[in] hw The pointer to hardware instance |
| 2057 | */ |
| 2058 | static inline void _i2c_s_deinit(void *const hw) |
| 2059 | { |
| 2060 | hri_sercomi2cs_clear_CTRLA_ENABLE_bit(hw); |
| 2061 | hri_sercomi2cs_set_CTRLA_SWRST_bit(hw); |
| 2062 | } |
| 2063 | |
| 2064 | /** |
| 2065 | * \internal De-initialize i2c slave |
| 2066 | * |
| 2067 | * \param[in] hw The pointer to hardware instance |
| 2068 | * \param[in] address Address to set |
| 2069 | */ |
| 2070 | static int32_t _i2c_s_set_address(void *const hw, const uint16_t address) |
| 2071 | { |
| 2072 | bool enabled; |
| 2073 | |
| 2074 | enabled = hri_sercomi2cs_get_CTRLA_ENABLE_bit(hw); |
| 2075 | |
| 2076 | CRITICAL_SECTION_ENTER() |
| 2077 | hri_sercomi2cs_clear_CTRLA_ENABLE_bit(hw); |
| 2078 | hri_sercomi2cs_write_ADDR_ADDR_bf(hw, address); |
| 2079 | CRITICAL_SECTION_LEAVE() |
| 2080 | |
| 2081 | if (enabled) { |
| 2082 | hri_sercomi2cs_set_CTRLA_ENABLE_bit(hw); |
| 2083 | } |
| 2084 | |
| 2085 | return ERR_NONE; |
| 2086 | } |
| 2087 | |
| 2088 | /* Sercom SPI implementation */ |
| 2089 | |
| 2090 | #ifndef SERCOM_USART_CTRLA_MODE_SPI_SLAVE |
| 2091 | #define SERCOM_USART_CTRLA_MODE_SPI_SLAVE (2 << 2) |
| 2092 | #endif |
| 2093 | |
| 2094 | #define SPI_DEV_IRQ_MODE 0x8000 |
| 2095 | |
| 2096 | #define _SPI_CS_PORT_EXTRACT(cs) (((cs) >> 0) & 0xFF) |
| 2097 | #define _SPI_CS_PIN_EXTRACT(cs) (((cs) >> 8) & 0xFF) |
| 2098 | |
| 2099 | COMPILER_PACK_SET(1) |
| 2100 | /** Initialization configuration of registers. */ |
| 2101 | struct sercomspi_regs_cfg { |
| 2102 | uint32_t ctrla; |
| 2103 | uint32_t ctrlb; |
| 2104 | uint32_t addr; |
| 2105 | uint8_t baud; |
| 2106 | uint8_t dbgctrl; |
| 2107 | uint16_t dummy_byte; |
| 2108 | uint8_t n; |
| 2109 | }; |
| 2110 | COMPILER_PACK_RESET() |
| 2111 | |
| 2112 | /** Build configuration from header macros. */ |
| 2113 | #define SERCOMSPI_REGS(n) \ |
| 2114 | { \ |
| 2115 | (((CONF_SERCOM_##n##_SPI_DORD) << SERCOM_SPI_CTRLA_DORD_Pos) \ |
| 2116 | | (CONF_SERCOM_##n##_SPI_CPOL << SERCOM_SPI_CTRLA_CPOL_Pos) \ |
| 2117 | | (CONF_SERCOM_##n##_SPI_CPHA << SERCOM_SPI_CTRLA_CPHA_Pos) \ |
| 2118 | | (CONF_SERCOM_##n##_SPI_AMODE_EN ? SERCOM_SPI_CTRLA_FORM(2) : SERCOM_SPI_CTRLA_FORM(0)) \ |
| 2119 | | SERCOM_SPI_CTRLA_DOPO(CONF_SERCOM_##n##_SPI_TXPO) | SERCOM_SPI_CTRLA_DIPO(CONF_SERCOM_##n##_SPI_RXPO) \ |
| 2120 | | (CONF_SERCOM_##n##_SPI_IBON << SERCOM_SPI_CTRLA_IBON_Pos) \ |
| 2121 | | (CONF_SERCOM_##n##_SPI_RUNSTDBY << SERCOM_SPI_CTRLA_RUNSTDBY_Pos) \ |
| 2122 | | SERCOM_SPI_CTRLA_MODE(CONF_SERCOM_##n##_SPI_MODE)), /* ctrla */ \ |
| 2123 | ((CONF_SERCOM_##n##_SPI_RXEN << SERCOM_SPI_CTRLB_RXEN_Pos) \ |
| 2124 | | (CONF_SERCOM_##n##_SPI_MSSEN << SERCOM_SPI_CTRLB_MSSEN_Pos) \ |
| 2125 | | (CONF_SERCOM_##n##_SPI_SSDE << SERCOM_SPI_CTRLB_SSDE_Pos) \ |
| 2126 | | (CONF_SERCOM_##n##_SPI_PLOADEN << SERCOM_SPI_CTRLB_PLOADEN_Pos) \ |
| 2127 | | SERCOM_SPI_CTRLB_AMODE(CONF_SERCOM_##n##_SPI_AMODE) \ |
| 2128 | | SERCOM_SPI_CTRLB_CHSIZE(CONF_SERCOM_##n##_SPI_CHSIZE)), /* ctrlb */ \ |
| 2129 | (SERCOM_SPI_ADDR_ADDR(CONF_SERCOM_##n##_SPI_ADDR) \ |
| 2130 | | SERCOM_SPI_ADDR_ADDRMASK(CONF_SERCOM_##n##_SPI_ADDRMASK)), /* addr */ \ |
| 2131 | ((uint8_t)CONF_SERCOM_##n##_SPI_BAUD_RATE), /* baud */ \ |
| 2132 | (CONF_SERCOM_##n##_SPI_DBGSTOP << SERCOM_SPI_DBGCTRL_DBGSTOP_Pos), /* dbgctrl */ \ |
| 2133 | CONF_SERCOM_##n##_SPI_DUMMYBYTE, /* Dummy byte for SPI master mode */ \ |
| 2134 | n /* sercom number */ \ |
| 2135 | } |
| 2136 | |
| 2137 | #ifndef CONF_SERCOM_0_SPI_ENABLE |
| 2138 | #define CONF_SERCOM_0_SPI_ENABLE 0 |
| 2139 | #endif |
| 2140 | #ifndef CONF_SERCOM_1_SPI_ENABLE |
| 2141 | #define CONF_SERCOM_1_SPI_ENABLE 0 |
| 2142 | #endif |
| 2143 | #ifndef CONF_SERCOM_2_SPI_ENABLE |
| 2144 | #define CONF_SERCOM_2_SPI_ENABLE 0 |
| 2145 | #endif |
| 2146 | #ifndef CONF_SERCOM_3_SPI_ENABLE |
| 2147 | #define CONF_SERCOM_3_SPI_ENABLE 0 |
| 2148 | #endif |
| 2149 | #ifndef CONF_SERCOM_4_SPI_ENABLE |
| 2150 | #define CONF_SERCOM_4_SPI_ENABLE 0 |
| 2151 | #endif |
| 2152 | #ifndef CONF_SERCOM_5_SPI_ENABLE |
| 2153 | #define CONF_SERCOM_5_SPI_ENABLE 0 |
| 2154 | #endif |
| 2155 | #ifndef CONF_SERCOM_6_SPI_ENABLE |
| 2156 | #define CONF_SERCOM_6_SPI_ENABLE 0 |
| 2157 | #endif |
| 2158 | #ifndef CONF_SERCOM_7_SPI_ENABLE |
| 2159 | #define CONF_SERCOM_7_SPI_ENABLE 0 |
| 2160 | #endif |
| 2161 | |
| 2162 | /** Amount of SERCOM that is used as SPI */ |
| 2163 | #define SERCOM_SPI_AMOUNT \ |
| 2164 | (CONF_SERCOM_0_SPI_ENABLE + CONF_SERCOM_1_SPI_ENABLE + CONF_SERCOM_2_SPI_ENABLE + CONF_SERCOM_3_SPI_ENABLE \ |
| 2165 | + CONF_SERCOM_4_SPI_ENABLE + CONF_SERCOM_5_SPI_ENABLE + CONF_SERCOM_6_SPI_ENABLE + CONF_SERCOM_7_SPI_ENABLE) |
| 2166 | |
| 2167 | #if SERCOM_SPI_AMOUNT < 1 |
| 2168 | /** Dummy array for compiling. */ |
| 2169 | static const struct sercomspi_regs_cfg sercomspi_regs[1] = {{0}}; |
| 2170 | #else |
| 2171 | /** The SERCOM SPI configurations of SERCOM that is used as SPI. */ |
| 2172 | static const struct sercomspi_regs_cfg sercomspi_regs[] = { |
| 2173 | #if CONF_SERCOM_0_SPI_ENABLE |
| 2174 | SERCOMSPI_REGS(0), |
| 2175 | #endif |
| 2176 | #if CONF_SERCOM_1_SPI_ENABLE |
| 2177 | SERCOMSPI_REGS(1), |
| 2178 | #endif |
| 2179 | #if CONF_SERCOM_2_SPI_ENABLE |
| 2180 | SERCOMSPI_REGS(2), |
| 2181 | #endif |
| 2182 | #if CONF_SERCOM_3_SPI_ENABLE |
| 2183 | SERCOMSPI_REGS(3), |
| 2184 | #endif |
| 2185 | #if CONF_SERCOM_4_SPI_ENABLE |
| 2186 | SERCOMSPI_REGS(4), |
| 2187 | #endif |
| 2188 | #if CONF_SERCOM_5_SPI_ENABLE |
| 2189 | SERCOMSPI_REGS(5), |
| 2190 | #endif |
| 2191 | #if CONF_SERCOM_6_SPI_ENABLE |
| 2192 | SERCOMSPI_REGS(6), |
| 2193 | #endif |
| 2194 | #if CONF_SERCOM_7_SPI_ENABLE |
| 2195 | SERCOMSPI_REGS(7), |
| 2196 | #endif |
| 2197 | }; |
| 2198 | #endif |
| 2199 | |
| 2200 | /** \internal De-initialize SERCOM SPI |
| 2201 | * |
| 2202 | * \param[in] hw Pointer to the hardware register base. |
| 2203 | * |
| 2204 | * \return De-initialization status |
| 2205 | */ |
| 2206 | static int32_t _spi_deinit(void *const hw) |
| 2207 | { |
| 2208 | hri_sercomspi_clear_CTRLA_ENABLE_bit(hw); |
| 2209 | hri_sercomspi_set_CTRLA_SWRST_bit(hw); |
| 2210 | |
| 2211 | return ERR_NONE; |
| 2212 | } |
| 2213 | |
| 2214 | /** \internal Enable SERCOM SPI |
| 2215 | * |
| 2216 | * \param[in] hw Pointer to the hardware register base. |
| 2217 | * |
| 2218 | * \return Enabling status |
| 2219 | */ |
| 2220 | static int32_t _spi_sync_enable(void *const hw) |
| 2221 | { |
| 2222 | if (hri_sercomspi_is_syncing(hw, SERCOM_SPI_SYNCBUSY_SWRST)) { |
| 2223 | return ERR_BUSY; |
| 2224 | } |
| 2225 | |
| 2226 | hri_sercomspi_set_CTRLA_ENABLE_bit(hw); |
| 2227 | |
| 2228 | return ERR_NONE; |
| 2229 | } |
| 2230 | |
| 2231 | /** \internal Enable SERCOM SPI |
| 2232 | * |
| 2233 | * \param[in] hw Pointer to the hardware register base. |
| 2234 | * |
| 2235 | * \return Enabling status |
| 2236 | */ |
| 2237 | static int32_t _spi_async_enable(void *const hw) |
| 2238 | { |
| 2239 | _spi_sync_enable(hw); |
| 2240 | uint8_t irq = _sercom_get_irq_num(hw); |
| 2241 | for (uint32_t i = 0; i < 4; i++) { |
| 2242 | NVIC_EnableIRQ((IRQn_Type)irq++); |
| 2243 | } |
| 2244 | |
| 2245 | return ERR_NONE; |
| 2246 | } |
| 2247 | |
| 2248 | /** \internal Disable SERCOM SPI |
| 2249 | * |
| 2250 | * \param[in] hw Pointer to the hardware register base. |
| 2251 | * |
| 2252 | * \return Disabling status |
| 2253 | */ |
| 2254 | static int32_t _spi_sync_disable(void *const hw) |
| 2255 | { |
| 2256 | if (hri_sercomspi_is_syncing(hw, SERCOM_SPI_SYNCBUSY_SWRST)) { |
| 2257 | return ERR_BUSY; |
| 2258 | } |
| 2259 | hri_sercomspi_clear_CTRLA_ENABLE_bit(hw); |
| 2260 | |
| 2261 | return ERR_NONE; |
| 2262 | } |
| 2263 | |
| 2264 | /** \internal Disable SERCOM SPI |
| 2265 | * |
| 2266 | * \param[in] hw Pointer to the hardware register base. |
| 2267 | * |
| 2268 | * \return Disabling status |
| 2269 | */ |
| 2270 | static int32_t _spi_async_disable(void *const hw) |
| 2271 | { |
| 2272 | _spi_sync_disable(hw); |
| 2273 | hri_sercomspi_clear_INTEN_reg( |
| 2274 | hw, SERCOM_SPI_INTFLAG_ERROR | SERCOM_SPI_INTFLAG_RXC | SERCOM_SPI_INTFLAG_TXC | SERCOM_SPI_INTFLAG_DRE); |
| 2275 | uint8_t irq = _sercom_get_irq_num(hw); |
| 2276 | for (uint32_t i = 0; i < 4; i++) { |
| 2277 | NVIC_DisableIRQ((IRQn_Type)irq++); |
| 2278 | } |
| 2279 | |
| 2280 | return ERR_NONE; |
| 2281 | } |
| 2282 | |
| 2283 | /** \internal Set SERCOM SPI mode |
| 2284 | * |
| 2285 | * \param[in] hw Pointer to the hardware register base. |
| 2286 | * \param[in] mode The mode to set |
| 2287 | * |
| 2288 | * \return Setting mode status |
| 2289 | */ |
| 2290 | static int32_t _spi_set_mode(void *const hw, const enum spi_transfer_mode mode) |
| 2291 | { |
| 2292 | uint32_t ctrla; |
| 2293 | |
| 2294 | if (hri_sercomspi_is_syncing(hw, SERCOM_SPI_SYNCBUSY_SWRST | SERCOM_SPI_SYNCBUSY_ENABLE)) { |
| 2295 | return ERR_BUSY; |
| 2296 | } |
| 2297 | |
| 2298 | ctrla = hri_sercomspi_read_CTRLA_reg(hw); |
| 2299 | ctrla &= ~(SERCOM_SPI_CTRLA_CPOL | SERCOM_SPI_CTRLA_CPHA); |
| 2300 | ctrla |= (mode & 0x3u) << SERCOM_SPI_CTRLA_CPHA_Pos; |
| 2301 | hri_sercomspi_write_CTRLA_reg(hw, ctrla); |
| 2302 | |
| 2303 | return ERR_NONE; |
| 2304 | } |
| 2305 | |
| 2306 | /** \internal Set SERCOM SPI baudrate |
| 2307 | * |
| 2308 | * \param[in] hw Pointer to the hardware register base. |
| 2309 | * \param[in] baud_val The baudrate to set |
| 2310 | * |
| 2311 | * \return Setting baudrate status |
| 2312 | */ |
| 2313 | static int32_t _spi_set_baudrate(void *const hw, const uint32_t baud_val) |
| 2314 | { |
| 2315 | if (hri_sercomspi_is_syncing(hw, SERCOM_SPI_SYNCBUSY_SWRST)) { |
| 2316 | return ERR_BUSY; |
| 2317 | } |
| 2318 | |
| 2319 | hri_sercomspi_write_BAUD_reg(hw, baud_val); |
| 2320 | |
| 2321 | return ERR_NONE; |
| 2322 | } |
| 2323 | |
| 2324 | /** \internal Set SERCOM SPI char size |
| 2325 | * |
| 2326 | * \param[in] hw Pointer to the hardware register base. |
| 2327 | * \param[in] baud_val The baudrate to set |
| 2328 | * \param[out] size Stored char size |
| 2329 | * |
| 2330 | * \return Setting char size status |
| 2331 | */ |
| 2332 | static int32_t _spi_set_char_size(void *const hw, const enum spi_char_size char_size, uint8_t *const size) |
| 2333 | { |
| 2334 | /* Only 8-bit or 9-bit accepted */ |
| 2335 | if (!(char_size == SPI_CHAR_SIZE_8 || char_size == SPI_CHAR_SIZE_9)) { |
| 2336 | return ERR_INVALID_ARG; |
| 2337 | } |
| 2338 | |
| 2339 | if (hri_sercomspi_is_syncing(hw, SERCOM_SPI_SYNCBUSY_SWRST | SERCOM_SPI_SYNCBUSY_CTRLB)) { |
| 2340 | return ERR_BUSY; |
| 2341 | } |
| 2342 | |
| 2343 | hri_sercomspi_write_CTRLB_CHSIZE_bf(hw, char_size); |
| 2344 | *size = (char_size == SPI_CHAR_SIZE_8) ? 1 : 2; |
| 2345 | |
| 2346 | return ERR_NONE; |
| 2347 | } |
| 2348 | |
| 2349 | /** \internal Set SERCOM SPI data order |
| 2350 | * |
| 2351 | * \param[in] hw Pointer to the hardware register base. |
| 2352 | * \param[in] baud_val The baudrate to set |
| 2353 | * |
| 2354 | * \return Setting data order status |
| 2355 | */ |
| 2356 | static int32_t _spi_set_data_order(void *const hw, const enum spi_data_order dord) |
| 2357 | { |
| 2358 | uint32_t ctrla; |
| 2359 | |
| 2360 | if (hri_sercomspi_is_syncing(hw, SERCOM_SPI_SYNCBUSY_SWRST)) { |
| 2361 | return ERR_BUSY; |
| 2362 | } |
| 2363 | |
| 2364 | ctrla = hri_sercomspi_read_CTRLA_reg(hw); |
| 2365 | |
| 2366 | if (dord == SPI_DATA_ORDER_LSB_1ST) { |
| 2367 | ctrla |= SERCOM_SPI_CTRLA_DORD; |
| 2368 | } else { |
| 2369 | ctrla &= ~SERCOM_SPI_CTRLA_DORD; |
| 2370 | } |
| 2371 | hri_sercomspi_write_CTRLA_reg(hw, ctrla); |
| 2372 | |
| 2373 | return ERR_NONE; |
| 2374 | } |
| 2375 | |
| 2376 | /** \brief Load SERCOM registers to init for SPI master mode |
| 2377 | * The settings will be applied with default master mode, unsupported things |
| 2378 | * are ignored. |
| 2379 | * \param[in, out] hw Pointer to the hardware register base. |
| 2380 | * \param[in] regs Pointer to register configuration values. |
| 2381 | */ |
| 2382 | static inline void _spi_load_regs_master(void *const hw, const struct sercomspi_regs_cfg *regs) |
| 2383 | { |
| 2384 | ASSERT(hw && regs); |
| 2385 | hri_sercomspi_write_CTRLA_reg( |
| 2386 | hw, regs->ctrla & ~(SERCOM_SPI_CTRLA_IBON | SERCOM_SPI_CTRLA_ENABLE | SERCOM_SPI_CTRLA_SWRST)); |
| 2387 | hri_sercomspi_write_CTRLB_reg( |
| 2388 | hw, |
| 2389 | (regs->ctrlb |
| 2390 | & ~(SERCOM_SPI_CTRLB_MSSEN | SERCOM_SPI_CTRLB_AMODE_Msk | SERCOM_SPI_CTRLB_SSDE | SERCOM_SPI_CTRLB_PLOADEN)) |
| 2391 | | (SERCOM_SPI_CTRLB_RXEN)); |
| 2392 | hri_sercomspi_write_BAUD_reg(hw, regs->baud); |
| 2393 | hri_sercomspi_write_DBGCTRL_reg(hw, regs->dbgctrl); |
| 2394 | } |
| 2395 | |
| 2396 | /** \brief Load SERCOM registers to init for SPI slave mode |
| 2397 | * The settings will be applied with default slave mode, unsupported things |
| 2398 | * are ignored. |
| 2399 | * \param[in, out] hw Pointer to the hardware register base. |
| 2400 | * \param[in] regs Pointer to register configuration values. |
| 2401 | */ |
| 2402 | static inline void _spi_load_regs_slave(void *const hw, const struct sercomspi_regs_cfg *regs) |
| 2403 | { |
| 2404 | ASSERT(hw && regs); |
| 2405 | hri_sercomspi_write_CTRLA_reg( |
| 2406 | hw, regs->ctrla & ~(SERCOM_SPI_CTRLA_IBON | SERCOM_SPI_CTRLA_ENABLE | SERCOM_SPI_CTRLA_SWRST)); |
| 2407 | hri_sercomspi_write_CTRLB_reg(hw, |
| 2408 | (regs->ctrlb & ~(SERCOM_SPI_CTRLB_MSSEN)) |
| 2409 | | (SERCOM_SPI_CTRLB_RXEN | SERCOM_SPI_CTRLB_SSDE | SERCOM_SPI_CTRLB_PLOADEN)); |
| 2410 | hri_sercomspi_write_ADDR_reg(hw, regs->addr); |
| 2411 | hri_sercomspi_write_DBGCTRL_reg(hw, regs->dbgctrl); |
| 2412 | while (hri_sercomspi_is_syncing(hw, 0xFFFFFFFF)) |
| 2413 | ; |
| 2414 | } |
| 2415 | |
| 2416 | /** \brief Return the pointer to register settings of specific SERCOM |
| 2417 | * \param[in] hw_addr The hardware register base address. |
| 2418 | * \return Pointer to register settings of specific SERCOM. |
| 2419 | */ |
| 2420 | static inline const struct sercomspi_regs_cfg *_spi_get_regs(const uint32_t hw_addr) |
| 2421 | { |
| 2422 | uint8_t n = _sercom_get_hardware_index((const void *)hw_addr); |
| 2423 | uint8_t i; |
| 2424 | |
| 2425 | for (i = 0; i < sizeof(sercomspi_regs) / sizeof(struct sercomspi_regs_cfg); i++) { |
| 2426 | if (sercomspi_regs[i].n == n) { |
| 2427 | return &sercomspi_regs[i]; |
| 2428 | } |
| 2429 | } |
| 2430 | |
| 2431 | return NULL; |
| 2432 | } |
| 2433 | |
Kévin Redon | ccbed0b | 2019-01-24 18:30:26 +0100 | [diff] [blame] | 2434 | /** |
| 2435 | * \internal Sercom interrupt handler |
| 2436 | */ |
Kévin Redon | 1f8ecef | 2019-01-31 13:36:12 +0100 | [diff] [blame] | 2437 | void SERCOM0_0_Handler(void) |
| 2438 | { |
| 2439 | _sercom_usart_interrupt_handler(_sercom0_dev); |
| 2440 | } |
| 2441 | /** |
| 2442 | * \internal Sercom interrupt handler |
| 2443 | */ |
| 2444 | void SERCOM0_1_Handler(void) |
| 2445 | { |
| 2446 | _sercom_usart_interrupt_handler(_sercom0_dev); |
| 2447 | } |
| 2448 | /** |
| 2449 | * \internal Sercom interrupt handler |
| 2450 | */ |
| 2451 | void SERCOM0_2_Handler(void) |
| 2452 | { |
| 2453 | _sercom_usart_interrupt_handler(_sercom0_dev); |
| 2454 | } |
| 2455 | /** |
| 2456 | * \internal Sercom interrupt handler |
| 2457 | */ |
| 2458 | void SERCOM0_3_Handler(void) |
| 2459 | { |
| 2460 | _sercom_usart_interrupt_handler(_sercom0_dev); |
| 2461 | } |
| 2462 | |
| 2463 | /** |
| 2464 | * \internal Sercom interrupt handler |
| 2465 | */ |
| 2466 | void SERCOM1_0_Handler(void) |
| 2467 | { |
| 2468 | _sercom_usart_interrupt_handler(_sercom1_dev); |
| 2469 | } |
| 2470 | /** |
| 2471 | * \internal Sercom interrupt handler |
| 2472 | */ |
| 2473 | void SERCOM1_1_Handler(void) |
| 2474 | { |
| 2475 | _sercom_usart_interrupt_handler(_sercom1_dev); |
| 2476 | } |
| 2477 | /** |
| 2478 | * \internal Sercom interrupt handler |
| 2479 | */ |
| 2480 | void SERCOM1_2_Handler(void) |
| 2481 | { |
| 2482 | _sercom_usart_interrupt_handler(_sercom1_dev); |
| 2483 | } |
| 2484 | /** |
| 2485 | * \internal Sercom interrupt handler |
| 2486 | */ |
| 2487 | void SERCOM1_3_Handler(void) |
| 2488 | { |
| 2489 | _sercom_usart_interrupt_handler(_sercom1_dev); |
| 2490 | } |
| 2491 | |
| 2492 | /** |
| 2493 | * \internal Sercom interrupt handler |
| 2494 | */ |
| 2495 | void SERCOM2_0_Handler(void) |
| 2496 | { |
| 2497 | _sercom_usart_interrupt_handler(_sercom2_dev); |
| 2498 | } |
| 2499 | /** |
| 2500 | * \internal Sercom interrupt handler |
| 2501 | */ |
| 2502 | void SERCOM2_1_Handler(void) |
| 2503 | { |
| 2504 | _sercom_usart_interrupt_handler(_sercom2_dev); |
| 2505 | } |
| 2506 | /** |
| 2507 | * \internal Sercom interrupt handler |
| 2508 | */ |
| 2509 | void SERCOM2_2_Handler(void) |
| 2510 | { |
| 2511 | _sercom_usart_interrupt_handler(_sercom2_dev); |
| 2512 | } |
| 2513 | /** |
| 2514 | * \internal Sercom interrupt handler |
| 2515 | */ |
| 2516 | void SERCOM2_3_Handler(void) |
| 2517 | { |
| 2518 | _sercom_usart_interrupt_handler(_sercom2_dev); |
| 2519 | } |
| 2520 | |
| 2521 | /** |
| 2522 | * \internal Sercom interrupt handler |
| 2523 | */ |
| 2524 | void SERCOM3_0_Handler(void) |
| 2525 | { |
| 2526 | _sercom_usart_interrupt_handler(_sercom3_dev); |
| 2527 | } |
| 2528 | /** |
| 2529 | * \internal Sercom interrupt handler |
| 2530 | */ |
| 2531 | void SERCOM3_1_Handler(void) |
| 2532 | { |
| 2533 | _sercom_usart_interrupt_handler(_sercom3_dev); |
| 2534 | } |
| 2535 | /** |
| 2536 | * \internal Sercom interrupt handler |
| 2537 | */ |
| 2538 | void SERCOM3_2_Handler(void) |
| 2539 | { |
| 2540 | _sercom_usart_interrupt_handler(_sercom3_dev); |
| 2541 | } |
| 2542 | /** |
| 2543 | * \internal Sercom interrupt handler |
| 2544 | */ |
| 2545 | void SERCOM3_3_Handler(void) |
| 2546 | { |
| 2547 | _sercom_usart_interrupt_handler(_sercom3_dev); |
| 2548 | } |
| 2549 | |
| 2550 | /** |
| 2551 | * \internal Sercom interrupt handler |
| 2552 | */ |
| 2553 | void SERCOM4_0_Handler(void) |
| 2554 | { |
| 2555 | _sercom_usart_interrupt_handler(_sercom4_dev); |
| 2556 | } |
| 2557 | /** |
| 2558 | * \internal Sercom interrupt handler |
| 2559 | */ |
| 2560 | void SERCOM4_1_Handler(void) |
| 2561 | { |
| 2562 | _sercom_usart_interrupt_handler(_sercom4_dev); |
| 2563 | } |
| 2564 | /** |
| 2565 | * \internal Sercom interrupt handler |
| 2566 | */ |
| 2567 | void SERCOM4_2_Handler(void) |
| 2568 | { |
| 2569 | _sercom_usart_interrupt_handler(_sercom4_dev); |
| 2570 | } |
| 2571 | /** |
| 2572 | * \internal Sercom interrupt handler |
| 2573 | */ |
| 2574 | void SERCOM4_3_Handler(void) |
| 2575 | { |
| 2576 | _sercom_usart_interrupt_handler(_sercom4_dev); |
| 2577 | } |
| 2578 | |
| 2579 | /** |
| 2580 | * \internal Sercom interrupt handler |
| 2581 | */ |
| 2582 | void SERCOM5_0_Handler(void) |
| 2583 | { |
| 2584 | _sercom_usart_interrupt_handler(_sercom5_dev); |
| 2585 | } |
| 2586 | /** |
| 2587 | * \internal Sercom interrupt handler |
| 2588 | */ |
| 2589 | void SERCOM5_1_Handler(void) |
| 2590 | { |
| 2591 | _sercom_usart_interrupt_handler(_sercom5_dev); |
| 2592 | } |
| 2593 | /** |
| 2594 | * \internal Sercom interrupt handler |
| 2595 | */ |
| 2596 | void SERCOM5_2_Handler(void) |
| 2597 | { |
| 2598 | _sercom_usart_interrupt_handler(_sercom5_dev); |
| 2599 | } |
| 2600 | /** |
| 2601 | * \internal Sercom interrupt handler |
| 2602 | */ |
| 2603 | void SERCOM5_3_Handler(void) |
| 2604 | { |
| 2605 | _sercom_usart_interrupt_handler(_sercom5_dev); |
| 2606 | } |
| 2607 | |
| 2608 | /** |
| 2609 | * \internal Sercom interrupt handler |
| 2610 | */ |
| 2611 | void SERCOM6_0_Handler(void) |
| 2612 | { |
| 2613 | _sercom_usart_interrupt_handler(_sercom6_dev); |
| 2614 | } |
| 2615 | /** |
| 2616 | * \internal Sercom interrupt handler |
| 2617 | */ |
| 2618 | void SERCOM6_1_Handler(void) |
| 2619 | { |
| 2620 | _sercom_usart_interrupt_handler(_sercom6_dev); |
| 2621 | } |
| 2622 | /** |
| 2623 | * \internal Sercom interrupt handler |
| 2624 | */ |
| 2625 | void SERCOM6_2_Handler(void) |
| 2626 | { |
| 2627 | _sercom_usart_interrupt_handler(_sercom6_dev); |
| 2628 | } |
| 2629 | /** |
| 2630 | * \internal Sercom interrupt handler |
| 2631 | */ |
| 2632 | void SERCOM6_3_Handler(void) |
| 2633 | { |
| 2634 | _sercom_usart_interrupt_handler(_sercom6_dev); |
| 2635 | } |
| 2636 | |
Kévin Redon | ba3a2fa | 2019-03-07 15:52:27 +0100 | [diff] [blame] | 2637 | /** |
| 2638 | * \internal Sercom interrupt handler |
| 2639 | */ |
| 2640 | void SERCOM7_0_Handler(void) |
| 2641 | { |
| 2642 | _sercom_usart_interrupt_handler(_sercom7_dev); |
| 2643 | } |
| 2644 | /** |
| 2645 | * \internal Sercom interrupt handler |
| 2646 | */ |
| 2647 | void SERCOM7_1_Handler(void) |
| 2648 | { |
| 2649 | _sercom_usart_interrupt_handler(_sercom7_dev); |
| 2650 | } |
| 2651 | /** |
| 2652 | * \internal Sercom interrupt handler |
| 2653 | */ |
| 2654 | void SERCOM7_2_Handler(void) |
| 2655 | { |
| 2656 | _sercom_usart_interrupt_handler(_sercom7_dev); |
| 2657 | } |
| 2658 | /** |
| 2659 | * \internal Sercom interrupt handler |
| 2660 | */ |
| 2661 | void SERCOM7_3_Handler(void) |
| 2662 | { |
| 2663 | _sercom_usart_interrupt_handler(_sercom7_dev); |
| 2664 | } |
| 2665 | |
Kévin Redon | 4cd3f7d | 2019-01-24 17:57:13 +0100 | [diff] [blame] | 2666 | int32_t _spi_m_sync_init(struct _spi_m_sync_dev *dev, void *const hw) |
| 2667 | { |
| 2668 | const struct sercomspi_regs_cfg *regs = _spi_get_regs((uint32_t)hw); |
| 2669 | |
| 2670 | ASSERT(dev && hw); |
| 2671 | |
| 2672 | if (regs == NULL) { |
| 2673 | return ERR_INVALID_ARG; |
| 2674 | } |
| 2675 | |
| 2676 | if (!hri_sercomspi_is_syncing(hw, SERCOM_SPI_SYNCBUSY_SWRST)) { |
| 2677 | uint32_t mode = regs->ctrla & SERCOM_SPI_CTRLA_MODE_Msk; |
| 2678 | if (hri_sercomspi_get_CTRLA_reg(hw, SERCOM_SPI_CTRLA_ENABLE)) { |
| 2679 | hri_sercomspi_clear_CTRLA_ENABLE_bit(hw); |
| 2680 | hri_sercomspi_wait_for_sync(hw, SERCOM_SPI_SYNCBUSY_ENABLE); |
| 2681 | } |
| 2682 | hri_sercomspi_write_CTRLA_reg(hw, SERCOM_SPI_CTRLA_SWRST | mode); |
| 2683 | } |
| 2684 | hri_sercomspi_wait_for_sync(hw, SERCOM_SPI_SYNCBUSY_SWRST); |
| 2685 | |
| 2686 | dev->prvt = hw; |
| 2687 | |
| 2688 | if ((regs->ctrla & SERCOM_SPI_CTRLA_MODE_Msk) == SERCOM_USART_CTRLA_MODE_SPI_SLAVE) { |
| 2689 | _spi_load_regs_slave(hw, regs); |
| 2690 | } else { |
| 2691 | _spi_load_regs_master(hw, regs); |
| 2692 | } |
| 2693 | |
| 2694 | /* Load character size from default hardware configuration */ |
| 2695 | dev->char_size = ((regs->ctrlb & SERCOM_SPI_CTRLB_CHSIZE_Msk) == 0) ? 1 : 2; |
| 2696 | |
| 2697 | dev->dummy_byte = regs->dummy_byte; |
| 2698 | |
| 2699 | return ERR_NONE; |
| 2700 | } |
| 2701 | |
| 2702 | int32_t _spi_s_sync_init(struct _spi_s_sync_dev *dev, void *const hw) |
| 2703 | { |
| 2704 | return _spi_m_sync_init(dev, hw); |
| 2705 | } |
| 2706 | |
| 2707 | int32_t _spi_m_async_init(struct _spi_async_dev *dev, void *const hw) |
| 2708 | { |
| 2709 | struct _spi_async_dev *spid = dev; |
| 2710 | /* Do hardware initialize. */ |
| 2711 | int32_t rc = _spi_m_sync_init((struct _spi_m_sync_dev *)dev, hw); |
| 2712 | |
| 2713 | if (rc < 0) { |
| 2714 | return rc; |
| 2715 | } |
| 2716 | |
| 2717 | _sercom_init_irq_param(hw, (void *)dev); |
| 2718 | /* Initialize callbacks: must use them */ |
| 2719 | spid->callbacks.complete = NULL; |
| 2720 | spid->callbacks.rx = NULL; |
| 2721 | spid->callbacks.tx = NULL; |
| 2722 | uint8_t irq = _sercom_get_irq_num(hw); |
| 2723 | for (uint32_t i = 0; i < 4; i++) { |
| 2724 | NVIC_DisableIRQ((IRQn_Type)irq); |
| 2725 | NVIC_ClearPendingIRQ((IRQn_Type)irq); |
| 2726 | irq++; |
| 2727 | } |
| 2728 | |
| 2729 | return ERR_NONE; |
| 2730 | } |
| 2731 | |
| 2732 | int32_t _spi_s_async_init(struct _spi_s_async_dev *dev, void *const hw) |
| 2733 | { |
| 2734 | return _spi_m_async_init(dev, hw); |
| 2735 | } |
| 2736 | |
| 2737 | int32_t _spi_m_async_deinit(struct _spi_async_dev *dev) |
| 2738 | { |
| 2739 | NVIC_DisableIRQ((IRQn_Type)_sercom_get_irq_num(dev->prvt)); |
| 2740 | NVIC_ClearPendingIRQ((IRQn_Type)_sercom_get_irq_num(dev->prvt)); |
| 2741 | |
| 2742 | return _spi_deinit(dev->prvt); |
| 2743 | } |
| 2744 | |
| 2745 | int32_t _spi_s_async_deinit(struct _spi_s_async_dev *dev) |
| 2746 | { |
| 2747 | NVIC_DisableIRQ((IRQn_Type)_sercom_get_irq_num(dev->prvt)); |
| 2748 | NVIC_ClearPendingIRQ((IRQn_Type)_sercom_get_irq_num(dev->prvt)); |
| 2749 | |
| 2750 | return _spi_deinit(dev->prvt); |
| 2751 | } |
| 2752 | |
| 2753 | int32_t _spi_m_sync_deinit(struct _spi_m_sync_dev *dev) |
| 2754 | { |
| 2755 | return _spi_deinit(dev->prvt); |
| 2756 | } |
| 2757 | |
| 2758 | int32_t _spi_s_sync_deinit(struct _spi_s_sync_dev *dev) |
| 2759 | { |
| 2760 | return _spi_deinit(dev->prvt); |
| 2761 | } |
| 2762 | |
| 2763 | int32_t _spi_m_sync_enable(struct _spi_m_sync_dev *dev) |
| 2764 | { |
| 2765 | ASSERT(dev && dev->prvt); |
| 2766 | |
| 2767 | return _spi_sync_enable(dev->prvt); |
| 2768 | } |
| 2769 | |
| 2770 | int32_t _spi_s_sync_enable(struct _spi_s_sync_dev *dev) |
| 2771 | { |
| 2772 | ASSERT(dev && dev->prvt); |
| 2773 | |
| 2774 | return _spi_sync_enable(dev->prvt); |
| 2775 | } |
| 2776 | |
| 2777 | int32_t _spi_m_async_enable(struct _spi_async_dev *dev) |
| 2778 | { |
| 2779 | ASSERT(dev && dev->prvt); |
| 2780 | |
| 2781 | return _spi_async_enable(dev->prvt); |
| 2782 | } |
| 2783 | |
| 2784 | int32_t _spi_s_async_enable(struct _spi_s_async_dev *dev) |
| 2785 | { |
| 2786 | ASSERT(dev && dev->prvt); |
| 2787 | |
| 2788 | return _spi_async_enable(dev->prvt); |
| 2789 | } |
| 2790 | |
| 2791 | int32_t _spi_m_sync_disable(struct _spi_m_sync_dev *dev) |
| 2792 | { |
| 2793 | ASSERT(dev && dev->prvt); |
| 2794 | |
| 2795 | return _spi_sync_disable(dev->prvt); |
| 2796 | } |
| 2797 | |
| 2798 | int32_t _spi_s_sync_disable(struct _spi_s_sync_dev *dev) |
| 2799 | { |
| 2800 | ASSERT(dev && dev->prvt); |
| 2801 | |
| 2802 | return _spi_sync_disable(dev->prvt); |
| 2803 | } |
| 2804 | |
| 2805 | int32_t _spi_m_async_disable(struct _spi_async_dev *dev) |
| 2806 | { |
| 2807 | ASSERT(dev && dev->prvt); |
| 2808 | |
| 2809 | return _spi_async_disable(dev->prvt); |
| 2810 | } |
| 2811 | |
| 2812 | int32_t _spi_s_async_disable(struct _spi_s_async_dev *dev) |
| 2813 | { |
| 2814 | ASSERT(dev && dev->prvt); |
| 2815 | |
| 2816 | return _spi_async_disable(dev->prvt); |
| 2817 | } |
| 2818 | |
| 2819 | int32_t _spi_m_sync_set_mode(struct _spi_m_sync_dev *dev, const enum spi_transfer_mode mode) |
| 2820 | { |
| 2821 | ASSERT(dev && dev->prvt); |
| 2822 | |
| 2823 | return _spi_set_mode(dev->prvt, mode); |
| 2824 | } |
| 2825 | |
| 2826 | int32_t _spi_m_async_set_mode(struct _spi_async_dev *dev, const enum spi_transfer_mode mode) |
| 2827 | { |
| 2828 | ASSERT(dev && dev->prvt); |
| 2829 | |
| 2830 | return _spi_set_mode(dev->prvt, mode); |
| 2831 | } |
| 2832 | |
| 2833 | int32_t _spi_s_async_set_mode(struct _spi_s_async_dev *dev, const enum spi_transfer_mode mode) |
| 2834 | { |
| 2835 | ASSERT(dev && dev->prvt); |
| 2836 | |
| 2837 | return _spi_set_mode(dev->prvt, mode); |
| 2838 | } |
| 2839 | |
| 2840 | int32_t _spi_s_sync_set_mode(struct _spi_s_sync_dev *dev, const enum spi_transfer_mode mode) |
| 2841 | { |
| 2842 | ASSERT(dev && dev->prvt); |
| 2843 | |
| 2844 | return _spi_set_mode(dev->prvt, mode); |
| 2845 | } |
| 2846 | |
| 2847 | int32_t _spi_calc_baud_val(struct spi_dev *dev, const uint32_t clk, const uint32_t baud) |
| 2848 | { |
| 2849 | int32_t rc; |
| 2850 | ASSERT(dev); |
| 2851 | |
| 2852 | /* Not accept 0es */ |
| 2853 | if (clk == 0 || baud == 0) { |
| 2854 | return ERR_INVALID_ARG; |
| 2855 | } |
| 2856 | |
| 2857 | /* Check baudrate range of current assigned clock */ |
| 2858 | if (!(baud <= (clk >> 1) && baud >= (clk >> 8))) { |
| 2859 | return ERR_INVALID_ARG; |
| 2860 | } |
| 2861 | |
| 2862 | rc = ((clk >> 1) / baud) - 1; |
| 2863 | return rc; |
| 2864 | } |
| 2865 | |
| 2866 | int32_t _spi_m_sync_set_baudrate(struct _spi_m_sync_dev *dev, const uint32_t baud_val) |
| 2867 | { |
| 2868 | ASSERT(dev && dev->prvt); |
| 2869 | |
| 2870 | return _spi_set_baudrate(dev->prvt, baud_val); |
| 2871 | } |
| 2872 | |
| 2873 | int32_t _spi_m_async_set_baudrate(struct _spi_async_dev *dev, const uint32_t baud_val) |
| 2874 | { |
| 2875 | ASSERT(dev && dev->prvt); |
| 2876 | |
| 2877 | return _spi_set_baudrate(dev->prvt, baud_val); |
| 2878 | } |
| 2879 | |
| 2880 | int32_t _spi_m_sync_set_char_size(struct _spi_m_sync_dev *dev, const enum spi_char_size char_size) |
| 2881 | { |
| 2882 | ASSERT(dev && dev->prvt); |
| 2883 | |
| 2884 | return _spi_set_char_size(dev->prvt, char_size, &dev->char_size); |
| 2885 | } |
| 2886 | |
| 2887 | int32_t _spi_m_async_set_char_size(struct _spi_async_dev *dev, const enum spi_char_size char_size) |
| 2888 | { |
| 2889 | ASSERT(dev && dev->prvt); |
| 2890 | |
| 2891 | return _spi_set_char_size(dev->prvt, char_size, &dev->char_size); |
| 2892 | } |
| 2893 | |
| 2894 | int32_t _spi_s_async_set_char_size(struct _spi_s_async_dev *dev, const enum spi_char_size char_size) |
| 2895 | { |
| 2896 | ASSERT(dev && dev->prvt); |
| 2897 | |
| 2898 | return _spi_set_char_size(dev->prvt, char_size, &dev->char_size); |
| 2899 | } |
| 2900 | |
| 2901 | int32_t _spi_s_sync_set_char_size(struct _spi_s_sync_dev *dev, const enum spi_char_size char_size) |
| 2902 | { |
| 2903 | ASSERT(dev && dev->prvt); |
| 2904 | |
| 2905 | return _spi_set_char_size(dev->prvt, char_size, &dev->char_size); |
| 2906 | } |
| 2907 | |
| 2908 | int32_t _spi_m_sync_set_data_order(struct _spi_m_sync_dev *dev, const enum spi_data_order dord) |
| 2909 | { |
| 2910 | ASSERT(dev && dev->prvt); |
| 2911 | |
| 2912 | return _spi_set_data_order(dev->prvt, dord); |
| 2913 | } |
| 2914 | |
| 2915 | int32_t _spi_m_async_set_data_order(struct _spi_async_dev *dev, const enum spi_data_order dord) |
| 2916 | { |
| 2917 | ASSERT(dev && dev->prvt); |
| 2918 | |
| 2919 | return _spi_set_data_order(dev->prvt, dord); |
| 2920 | } |
| 2921 | |
| 2922 | int32_t _spi_s_async_set_data_order(struct _spi_s_async_dev *dev, const enum spi_data_order dord) |
| 2923 | { |
| 2924 | ASSERT(dev && dev->prvt); |
| 2925 | |
| 2926 | return _spi_set_data_order(dev->prvt, dord); |
| 2927 | } |
| 2928 | |
| 2929 | int32_t _spi_s_sync_set_data_order(struct _spi_s_sync_dev *dev, const enum spi_data_order dord) |
| 2930 | { |
| 2931 | ASSERT(dev && dev->prvt); |
| 2932 | |
| 2933 | return _spi_set_data_order(dev->prvt, dord); |
| 2934 | } |
| 2935 | |
| 2936 | /** Wait until SPI bus idle. */ |
| 2937 | static inline void _spi_wait_bus_idle(void *const hw) |
| 2938 | { |
| 2939 | while (!(hri_sercomspi_get_INTFLAG_reg(hw, SERCOM_SPI_INTFLAG_TXC | SERCOM_SPI_INTFLAG_DRE))) { |
| 2940 | ; |
| 2941 | } |
| 2942 | hri_sercomspi_clear_INTFLAG_reg(hw, SERCOM_SPI_INTFLAG_TXC | SERCOM_SPI_INTFLAG_DRE); |
| 2943 | } |
| 2944 | |
| 2945 | /** Holds run time information for message sync transaction. */ |
| 2946 | struct _spi_trans_ctrl { |
| 2947 | /** Pointer to transmitting data buffer. */ |
| 2948 | uint8_t *txbuf; |
| 2949 | /** Pointer to receiving data buffer. */ |
| 2950 | uint8_t *rxbuf; |
| 2951 | /** Count number of data transmitted. */ |
| 2952 | uint32_t txcnt; |
| 2953 | /** Count number of data received. */ |
| 2954 | uint32_t rxcnt; |
| 2955 | /** Data character size. */ |
| 2956 | uint8_t char_size; |
| 2957 | }; |
| 2958 | |
| 2959 | /** Check interrupt flag of RXC and update transaction runtime information. */ |
| 2960 | static inline bool _spi_rx_check_and_receive(void *const hw, const uint32_t iflag, struct _spi_trans_ctrl *ctrl) |
| 2961 | { |
| 2962 | uint32_t data; |
| 2963 | |
| 2964 | if (!(iflag & SERCOM_SPI_INTFLAG_RXC)) { |
| 2965 | return false; |
| 2966 | } |
| 2967 | |
| 2968 | data = hri_sercomspi_read_DATA_reg(hw); |
| 2969 | |
| 2970 | if (ctrl->rxbuf) { |
| 2971 | *ctrl->rxbuf++ = (uint8_t)data; |
| 2972 | |
| 2973 | if (ctrl->char_size > 1) { |
| 2974 | *ctrl->rxbuf++ = (uint8_t)(data >> 8); |
| 2975 | } |
| 2976 | } |
| 2977 | |
| 2978 | ctrl->rxcnt++; |
| 2979 | |
| 2980 | return true; |
| 2981 | } |
| 2982 | |
| 2983 | /** Check interrupt flag of DRE and update transaction runtime information. */ |
| 2984 | static inline void _spi_tx_check_and_send(void *const hw, const uint32_t iflag, struct _spi_trans_ctrl *ctrl, |
| 2985 | uint16_t dummy) |
| 2986 | { |
| 2987 | uint32_t data; |
| 2988 | |
| 2989 | if (!(SERCOM_SPI_INTFLAG_DRE & iflag)) { |
| 2990 | return; |
| 2991 | } |
| 2992 | |
| 2993 | if (ctrl->txbuf) { |
| 2994 | data = *ctrl->txbuf++; |
| 2995 | |
| 2996 | if (ctrl->char_size > 1) { |
| 2997 | data |= (*ctrl->txbuf) << 8; |
| 2998 | ctrl->txbuf++; |
| 2999 | } |
| 3000 | } else { |
| 3001 | data = dummy; |
| 3002 | } |
| 3003 | |
| 3004 | ctrl->txcnt++; |
| 3005 | hri_sercomspi_write_DATA_reg(hw, data); |
| 3006 | } |
| 3007 | |
| 3008 | /** Check interrupt flag of ERROR and update transaction runtime information. */ |
| 3009 | static inline int32_t _spi_err_check(const uint32_t iflag, void *const hw) |
| 3010 | { |
| 3011 | if (SERCOM_SPI_INTFLAG_ERROR & iflag) { |
| 3012 | hri_sercomspi_clear_STATUS_reg(hw, ~0); |
| 3013 | hri_sercomspi_clear_INTFLAG_reg(hw, SERCOM_SPI_INTFLAG_ERROR); |
| 3014 | return ERR_OVERFLOW; |
| 3015 | } |
| 3016 | |
| 3017 | return ERR_NONE; |
| 3018 | } |
| 3019 | |
| 3020 | int32_t _spi_m_sync_trans(struct _spi_m_sync_dev *dev, const struct spi_msg *msg) |
| 3021 | { |
| 3022 | void * hw = dev->prvt; |
| 3023 | int32_t rc = 0; |
| 3024 | struct _spi_trans_ctrl ctrl = {msg->txbuf, msg->rxbuf, 0, 0, dev->char_size}; |
| 3025 | |
| 3026 | ASSERT(dev && hw); |
| 3027 | |
| 3028 | /* If settings are not applied (pending), we can not go on */ |
| 3029 | if (hri_sercomspi_is_syncing( |
| 3030 | hw, (SERCOM_SPI_SYNCBUSY_SWRST | SERCOM_SPI_SYNCBUSY_ENABLE | SERCOM_SPI_SYNCBUSY_CTRLB))) { |
| 3031 | return ERR_BUSY; |
| 3032 | } |
| 3033 | |
| 3034 | /* SPI must be enabled to start synchronous transfer */ |
| 3035 | if (!hri_sercomspi_get_CTRLA_ENABLE_bit(hw)) { |
| 3036 | return ERR_NOT_INITIALIZED; |
| 3037 | } |
| 3038 | |
| 3039 | for (;;) { |
| 3040 | uint32_t iflag = hri_sercomspi_read_INTFLAG_reg(hw); |
| 3041 | |
| 3042 | if (!_spi_rx_check_and_receive(hw, iflag, &ctrl)) { |
| 3043 | /* In master mode, do not start next byte before previous byte received |
| 3044 | * to make better output waveform */ |
| 3045 | if (ctrl.rxcnt >= ctrl.txcnt) { |
| 3046 | _spi_tx_check_and_send(hw, iflag, &ctrl, dev->dummy_byte); |
| 3047 | } |
| 3048 | } |
| 3049 | |
| 3050 | rc = _spi_err_check(iflag, hw); |
| 3051 | |
| 3052 | if (rc < 0) { |
| 3053 | break; |
| 3054 | } |
| 3055 | if (ctrl.txcnt >= msg->size && ctrl.rxcnt >= msg->size) { |
| 3056 | rc = ctrl.txcnt; |
| 3057 | break; |
| 3058 | } |
| 3059 | } |
| 3060 | /* Wait until SPI bus idle */ |
| 3061 | _spi_wait_bus_idle(hw); |
| 3062 | |
| 3063 | return rc; |
| 3064 | } |
| 3065 | |
| 3066 | int32_t _spi_m_async_enable_tx(struct _spi_async_dev *dev, bool state) |
| 3067 | { |
| 3068 | void *hw = dev->prvt; |
| 3069 | |
| 3070 | ASSERT(dev && hw); |
| 3071 | |
| 3072 | if (state) { |
| 3073 | hri_sercomspi_set_INTEN_DRE_bit(hw); |
| 3074 | } else { |
| 3075 | hri_sercomspi_clear_INTEN_DRE_bit(hw); |
| 3076 | } |
| 3077 | |
| 3078 | return ERR_NONE; |
| 3079 | } |
| 3080 | |
| 3081 | int32_t _spi_s_async_enable_tx(struct _spi_s_async_dev *dev, bool state) |
| 3082 | { |
| 3083 | return _spi_m_async_enable_tx(dev, state); |
| 3084 | } |
| 3085 | |
| 3086 | int32_t _spi_m_async_enable_rx(struct _spi_async_dev *dev, bool state) |
| 3087 | { |
| 3088 | void *hw = dev->prvt; |
| 3089 | |
| 3090 | ASSERT(dev); |
| 3091 | ASSERT(hw); |
| 3092 | |
| 3093 | if (state) { |
| 3094 | hri_sercomspi_set_INTEN_RXC_bit(hw); |
| 3095 | } else { |
| 3096 | hri_sercomspi_clear_INTEN_RXC_bit(hw); |
| 3097 | } |
| 3098 | |
| 3099 | return ERR_NONE; |
| 3100 | } |
| 3101 | |
| 3102 | int32_t _spi_s_async_enable_rx(struct _spi_s_async_dev *dev, bool state) |
| 3103 | { |
| 3104 | return _spi_m_async_enable_rx(dev, state); |
| 3105 | } |
| 3106 | |
| 3107 | int32_t _spi_m_async_enable_tx_complete(struct _spi_async_dev *dev, bool state) |
| 3108 | { |
| 3109 | ASSERT(dev && dev->prvt); |
| 3110 | |
| 3111 | if (state) { |
| 3112 | hri_sercomspi_set_INTEN_TXC_bit(dev->prvt); |
| 3113 | } else { |
| 3114 | hri_sercomspi_clear_INTEN_TXC_bit(dev->prvt); |
| 3115 | } |
| 3116 | |
| 3117 | return ERR_NONE; |
| 3118 | } |
| 3119 | |
| 3120 | int32_t _spi_s_async_enable_ss_detect(struct _spi_s_async_dev *dev, bool state) |
| 3121 | { |
| 3122 | return _spi_m_async_enable_tx_complete(dev, state); |
| 3123 | } |
| 3124 | |
| 3125 | int32_t _spi_m_async_write_one(struct _spi_async_dev *dev, uint16_t data) |
| 3126 | { |
| 3127 | ASSERT(dev && dev->prvt); |
| 3128 | |
| 3129 | hri_sercomspi_write_DATA_reg(dev->prvt, data); |
| 3130 | |
| 3131 | return ERR_NONE; |
| 3132 | } |
| 3133 | |
| 3134 | int32_t _spi_s_async_write_one(struct _spi_s_async_dev *dev, uint16_t data) |
| 3135 | { |
| 3136 | ASSERT(dev && dev->prvt); |
| 3137 | |
| 3138 | hri_sercomspi_write_DATA_reg(dev->prvt, data); |
| 3139 | |
| 3140 | return ERR_NONE; |
| 3141 | } |
| 3142 | |
| 3143 | int32_t _spi_s_sync_write_one(struct _spi_s_sync_dev *dev, uint16_t data) |
| 3144 | { |
| 3145 | ASSERT(dev && dev->prvt); |
| 3146 | |
| 3147 | hri_sercomspi_write_DATA_reg(dev->prvt, data); |
| 3148 | |
| 3149 | return ERR_NONE; |
| 3150 | } |
| 3151 | |
| 3152 | uint16_t _spi_m_async_read_one(struct _spi_async_dev *dev) |
| 3153 | { |
| 3154 | ASSERT(dev && dev->prvt); |
| 3155 | |
| 3156 | return hri_sercomspi_read_DATA_reg(dev->prvt); |
| 3157 | } |
| 3158 | |
| 3159 | uint16_t _spi_s_async_read_one(struct _spi_s_async_dev *dev) |
| 3160 | { |
| 3161 | ASSERT(dev && dev->prvt); |
| 3162 | |
| 3163 | return hri_sercomspi_read_DATA_reg(dev->prvt); |
| 3164 | } |
| 3165 | |
| 3166 | uint16_t _spi_s_sync_read_one(struct _spi_s_sync_dev *dev) |
| 3167 | { |
| 3168 | ASSERT(dev && dev->prvt); |
| 3169 | |
| 3170 | return hri_sercomspi_read_DATA_reg(dev->prvt); |
| 3171 | } |
| 3172 | |
| 3173 | int32_t _spi_m_async_register_callback(struct _spi_async_dev *dev, const enum _spi_async_dev_cb_type cb_type, |
| 3174 | const FUNC_PTR func) |
| 3175 | { |
| 3176 | typedef void (*func_t)(void); |
| 3177 | struct _spi_async_dev *spid = dev; |
| 3178 | |
| 3179 | ASSERT(dev && (cb_type < SPI_DEV_CB_N)); |
| 3180 | |
| 3181 | func_t *p_ls = (func_t *)&spid->callbacks; |
| 3182 | p_ls[cb_type] = (func_t)func; |
| 3183 | |
| 3184 | return ERR_NONE; |
| 3185 | } |
| 3186 | |
| 3187 | int32_t _spi_s_async_register_callback(struct _spi_s_async_dev *dev, const enum _spi_s_async_dev_cb_type cb_type, |
| 3188 | const FUNC_PTR func) |
| 3189 | { |
| 3190 | return _spi_m_async_register_callback(dev, cb_type, func); |
| 3191 | } |
| 3192 | |
| 3193 | bool _spi_s_sync_is_tx_ready(struct _spi_s_sync_dev *dev) |
| 3194 | { |
| 3195 | ASSERT(dev && dev->prvt); |
| 3196 | |
| 3197 | return hri_sercomi2cm_get_INTFLAG_reg(dev->prvt, SERCOM_SPI_INTFLAG_DRE); |
| 3198 | } |
| 3199 | |
| 3200 | bool _spi_s_sync_is_rx_ready(struct _spi_s_sync_dev *dev) |
| 3201 | { |
| 3202 | ASSERT(dev && dev->prvt); |
| 3203 | |
| 3204 | return hri_sercomi2cm_get_INTFLAG_reg(dev->prvt, SERCOM_SPI_INTFLAG_RXC); |
| 3205 | } |
| 3206 | |
| 3207 | bool _spi_s_sync_is_ss_deactivated(struct _spi_s_sync_dev *dev) |
| 3208 | { |
| 3209 | void *hw = dev->prvt; |
| 3210 | |
| 3211 | ASSERT(dev && hw); |
| 3212 | |
| 3213 | if (hri_sercomi2cm_get_INTFLAG_reg(hw, SERCOM_SPI_INTFLAG_TXC)) { |
| 3214 | hri_sercomspi_clear_INTFLAG_reg(hw, SERCOM_SPI_INTFLAG_TXC); |
| 3215 | return true; |
| 3216 | } |
| 3217 | return false; |
| 3218 | } |
| 3219 | |
| 3220 | bool _spi_s_sync_is_error(struct _spi_s_sync_dev *dev) |
| 3221 | { |
| 3222 | void *hw = dev->prvt; |
| 3223 | |
| 3224 | ASSERT(dev && hw); |
| 3225 | |
| 3226 | if (hri_sercomi2cm_get_INTFLAG_reg(hw, SERCOM_SPI_INTFLAG_ERROR)) { |
| 3227 | hri_sercomspi_clear_STATUS_reg(hw, SERCOM_SPI_STATUS_BUFOVF); |
| 3228 | hri_sercomspi_clear_INTFLAG_reg(hw, SERCOM_SPI_INTFLAG_ERROR); |
| 3229 | return true; |
| 3230 | } |
| 3231 | return false; |
| 3232 | } |
| 3233 | |
| 3234 | /** |
| 3235 | * \brief Enable/disable SPI master interrupt |
| 3236 | * |
| 3237 | * param[in] device The pointer to SPI master device instance |
| 3238 | * param[in] type The type of interrupt to disable/enable if applicable |
| 3239 | * param[in] state Enable or disable |
| 3240 | */ |
| 3241 | void _spi_m_async_set_irq_state(struct _spi_async_dev *const device, const enum _spi_async_dev_cb_type type, |
| 3242 | const bool state) |
| 3243 | { |
| 3244 | ASSERT(device); |
| 3245 | |
| 3246 | if (SPI_DEV_CB_ERROR == type) { |
| 3247 | hri_sercomspi_write_INTEN_ERROR_bit(device->prvt, state); |
| 3248 | } |
| 3249 | } |
| 3250 | |
| 3251 | /** |
| 3252 | * \brief Enable/disable SPI slave interrupt |
| 3253 | * |
| 3254 | * param[in] device The pointer to SPI slave device instance |
| 3255 | * param[in] type The type of interrupt to disable/enable if applicable |
| 3256 | * param[in] state Enable or disable |
| 3257 | */ |
| 3258 | void _spi_s_async_set_irq_state(struct _spi_async_dev *const device, const enum _spi_async_dev_cb_type type, |
| 3259 | const bool state) |
| 3260 | { |
| 3261 | _spi_m_async_set_irq_state(device, type, state); |
| 3262 | } |