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Diffstat (limited to 'c/src/lib/libbsp/arm/tms570/pinmux/pinmux.c')
| -rw-r--r-- | c/src/lib/libbsp/arm/tms570/pinmux/pinmux.c | 195 |
1 files changed, 0 insertions, 195 deletions
diff --git a/c/src/lib/libbsp/arm/tms570/pinmux/pinmux.c b/c/src/lib/libbsp/arm/tms570/pinmux/pinmux.c deleted file mode 100644 index 11e557910b..0000000000 --- a/c/src/lib/libbsp/arm/tms570/pinmux/pinmux.c +++ /dev/null @@ -1,195 +0,0 @@ -/** - * @file pinmux.c - * - * @ingroup tms570 - * - * @brief I/O Multiplexing Module (IOMM) basic support - */ - -/* - * Copyright (c) 2015 Premysl Houdek <kom541000@gmail.com> - * - * Google Summer of Code 2014 at - * Czech Technical University in Prague - * Zikova 1903/4 - * 166 36 Praha 6 - * Czech Republic - * - * The license and distribution terms for this file may be - * found in the file LICENSE in this distribution or at - * http://www.rtems.org/license/LICENSE. - */ - -#include <bsp/tms570.h> -#include <bsp/tms570-pinmux.h> -#include <bsp/irq.h> - -uint32_t tms570_bsp_pinmmr_kick_key0 = 0x83E70B13U; -uint32_t tms570_bsp_pinmmr_kick_key1 = 0x95A4F1E0U; - -/** - * @brief select desired function of pin/ball - * - * The function setups multiplexer to interconnect pin with - * specified function/peripheral. Pin number is index into pinmux - * entries array. Predefined values for pins are in a format - * TMS570_BALL_ \c column \c row (for example \c TMS570_BALL_N19). - * The multiplexer allows to interconnect one pin to multiple - * signal sources/sinks in the theory but it is usually bad choice. - * The function sets only specified function and clears all other - * connections. - * - * @param[in] pin_num pin/ball identifier (index into pinmux array), - * @param[in] pin_fnc function number 0 .. 7, if value \c TMS570_PIN_FNC_AUTO - * is specified then pin function is extracted from - * pin_num argument - * @retval Void - */ -void -tms570_bsp_pin_set_function(int pin_num, int pin_fnc) -{ - unsigned int pin_shift; - volatile uint32_t *pinmmrx; - - if ( pin_fnc == TMS570_PIN_FNC_AUTO ) { - pin_fnc = (pin_num & TMS570_PIN_FNC_MASK) >> TMS570_PIN_FNC_SHIFT; - } - tms570_bsp_pin_to_pinmmrx(&pinmmrx, &pin_shift, pin_num); - *pinmmrx = (*pinmmrx & ~(0xff << pin_shift)) | (1 << (pin_fnc + pin_shift)); -} - -/** - * @brief clear connection between pin and specified peripherals/function - * - * This function switches off given connection and leaves rest - * of multiplexer setup intact. - * - * @param[in] pin_num pin/ball identifier (index into pinmux array) - * @param[in] pin_fnc function number 0 .. 7, if value \c TMS570_PIN_FNC_AUTO - * is specified then pin function is extracted from - * pin_num argument - * @retval Void - */ -void -tms570_bsp_pin_clear_function(int pin_num, int pin_fnc) -{ - unsigned int pin_shift; - volatile uint32_t *pinmmrx; - - if ( pin_fnc == TMS570_PIN_FNC_AUTO ) { - pin_fnc = (pin_num & TMS570_PIN_FNC_MASK) >> TMS570_PIN_FNC_SHIFT; - } - tms570_bsp_pin_to_pinmmrx(&pinmmrx, &pin_shift, pin_num); - *pinmmrx = *pinmmrx & ~(1 << (pin_fnc+pin_shift)); -} - -/** - * @brief configure one pin according to its function specification - * - * The function setups multiplexer to interconnect pin with - * specified function/peripheral. Predefined values for pins combined with - * function are in a format TMS570_BALL_ \c column \c row \c function - * (for example \c TMS570_BALL_W3_SCIRX). - * If the function can be connected to more pins then specification - * includes infomation which allows to disconnect alternative pin to peripheral - * input connection or switch input multiplexer to right pin. - * - * @param[in] pin_num_and_fnc pin function descriptor is build by macro - * \c TMS570_PIN_AND_FNC which takes pin/pinmmr specification - * build by \c TMS570_BALL_WITH_MMR and function index in output - * multiplexer. If the peripheral can be connected to other input - * alternative then actual pin description and alternative to - * disconnected/reconnect are combined together by - * \c TMS570_PIN_WITH_IN_ALT macro. If clear of alternative - * connection is required then flag \c TMS570_PIN_CLEAR_RQ_MASK - * is ored to alternative description. - * - * @retval Void - */ -void -tms570_bsp_pin_config_one(uint32_t pin_num_and_fnc) -{ - rtems_interrupt_level intlev; - uint32_t pin_in_alt; - - rtems_interrupt_disable(intlev); - - TMS570_IOMM.KICK_REG0 = tms570_bsp_pinmmr_kick_key0; - TMS570_IOMM.KICK_REG1 = tms570_bsp_pinmmr_kick_key1; - - pin_in_alt = pin_num_and_fnc & TMS570_PIN_IN_ALT_MASK; - if ( pin_in_alt ) { - pin_in_alt >>= TMS570_PIN_IN_ALT_SHIFT; - if ( pin_in_alt & TMS570_PIN_CLEAR_RQ_MASK ) { - tms570_bsp_pin_clear_function(pin_in_alt, TMS570_PIN_FNC_AUTO); - } else { - tms570_bsp_pin_set_function(pin_in_alt, TMS570_PIN_FNC_AUTO); - } - } - - pin_num_and_fnc &= TMS570_PIN_NUM_FNC_MASK; - if ( pin_num_and_fnc & TMS570_PIN_CLEAR_RQ_MASK ) { - tms570_bsp_pin_clear_function(pin_num_and_fnc, TMS570_PIN_FNC_AUTO); - } else { - tms570_bsp_pin_set_function(pin_num_and_fnc, TMS570_PIN_FNC_AUTO); - } - - TMS570_IOMM.KICK_REG0 = 0; - TMS570_IOMM.KICK_REG1 = 0; - - rtems_interrupt_enable(intlev); -} - -/** - * @brief configure block or whole pin multiplexer - * - * Function change multiplexer content. It is intended for initial - * chip setup and does not use locking. If complete reconfiguration - * is required at runtime then it is application responsibility - * to protect and serialize change with peripherals drivers - * and parallel calls - * - * @param[in] pinmmr_values pointer to array with required multiplexer setup - * @param[in] reg_start starting register, this allows to configure non-consecutive - * registers groups found on some MCU family members - * @param[in] reg_count number of words in initialization array to set - * to corresponding registers - * - * @retval Void - */ -void -tms570_bsp_pinmmr_config(const uint32_t *pinmmr_values, int reg_start, int reg_count) -{ - volatile uint32_t *pinmmrx; - const uint32_t *pval; - int cnt; - - if ( reg_count <= 0) - return; - - TMS570_IOMM.KICK_REG0 = tms570_bsp_pinmmr_kick_key0; - TMS570_IOMM.KICK_REG1 = tms570_bsp_pinmmr_kick_key1; - - pinmmrx = (&TMS570_IOMM.PINMUX.PINMMR0) + reg_start; - pval = pinmmr_values; - cnt = reg_count; - - do { - *pinmmrx = *pinmmrx & *pval; - pinmmrx++; - pval++; - } while( --cnt ); - - pinmmrx = (&TMS570_IOMM.PINMUX.PINMMR0) + reg_start; - pval = pinmmr_values; - cnt = reg_count; - - do { - *pinmmrx = *pval; - pinmmrx++; - pval++; - } while( --cnt ); - - TMS570_IOMM.KICK_REG0 = 0; - TMS570_IOMM.KICK_REG1 = 0; -} |