diff options
Diffstat (limited to 'src/vendorcode/cavium/bdk/libbdk-hal/bdk-gpio.c')
| -rw-r--r-- | src/vendorcode/cavium/bdk/libbdk-hal/bdk-gpio.c | 197 |
1 files changed, 197 insertions, 0 deletions
diff --git a/src/vendorcode/cavium/bdk/libbdk-hal/bdk-gpio.c b/src/vendorcode/cavium/bdk/libbdk-hal/bdk-gpio.c new file mode 100644 index 0000000000..55f0dbf3f2 --- /dev/null +++ b/src/vendorcode/cavium/bdk/libbdk-hal/bdk-gpio.c @@ -0,0 +1,197 @@ +/***********************license start*********************************** +* Copyright (c) 2003-2017 Cavium Inc. (support@cavium.com). All rights +* reserved. +* +* +* Redistribution and use in source and binary forms, with or without +* modification, are permitted provided that the following conditions are +* met: +* +* * Redistributions of source code must retain the above copyright +* notice, this list of conditions and the following disclaimer. +* +* * Redistributions in binary form must reproduce the above +* copyright notice, this list of conditions and the following +* disclaimer in the documentation and/or other materials provided +* with the distribution. +* +* * Neither the name of Cavium Inc. nor the names of +* its contributors may be used to endorse or promote products +* derived from this software without specific prior written +* permission. +* +* This Software, including technical data, may be subject to U.S. export +* control laws, including the U.S. Export Administration Act and its +* associated regulations, and may be subject to export or import +* regulations in other countries. +* +* TO THE MAXIMUM EXTENT PERMITTED BY LAW, THE SOFTWARE IS PROVIDED "AS IS" +* AND WITH ALL FAULTS AND CAVIUM INC. MAKES NO PROMISES, REPRESENTATIONS OR +* WARRANTIES, EITHER EXPRESS, IMPLIED, STATUTORY, OR OTHERWISE, WITH RESPECT +* TO THE SOFTWARE, INCLUDING ITS CONDITION, ITS CONFORMITY TO ANY +* REPRESENTATION OR DESCRIPTION, OR THE EXISTENCE OF ANY LATENT OR PATENT +* DEFECTS, AND CAVIUM SPECIFICALLY DISCLAIMS ALL IMPLIED (IF ANY) WARRANTIES +* OF TITLE, MERCHANTABILITY, NONINFRINGEMENT, FITNESS FOR A PARTICULAR +* PURPOSE, LACK OF VIRUSES, ACCURACY OR COMPLETENESS, QUIET ENJOYMENT, +* QUIET POSSESSION OR CORRESPONDENCE TO DESCRIPTION. THE ENTIRE RISK +* ARISING OUT OF USE OR PERFORMANCE OF THE SOFTWARE LIES WITH YOU. +***********************license end**************************************/ +#include <bdk.h> +#include "libbdk-arch/bdk-csrs-gpio.h" + +/* This code is an optional part of the BDK. It is only linked in + if BDK_REQUIRE() needs it */ +BDK_REQUIRE_DEFINE(GPIO); + +/** + * Initialize a single GPIO as either an input or output. If it is + * an output, also set its output value. + * + * @param gpio GPIO to initialize + * @param is_output Non zero if this GPIO should be an output + * @param output_value + * Value of the GPIO if it should be an output. Not used if the + * GPIO isn't an output. + * + * @return Zero on success, negative ob failure + */ +int bdk_gpio_initialize(bdk_node_t node, int gpio, int is_output, int output_value) +{ + if ((gpio >= 0) && (gpio < bdk_gpio_get_num())) + { + int gpio_group = gpio >> 6; + int gpio_index = gpio & 63; + if (output_value) + bdk_gpio_set(node, gpio_group, 1ull << gpio_index); + else + bdk_gpio_clear(node, gpio_group, 1ull << gpio_index); + + BDK_CSR_DEFINE(cfg, BDK_GPIO_BIT_CFGX(gpio)); + cfg.u = 0; + cfg.s.tx_oe = !!is_output; + BDK_CSR_WRITE(node, BDK_GPIO_BIT_CFGX(gpio), cfg.u); + } + else + { + bdk_error("bdk_gpio_initialize: Illegal GPIO\n"); + return -1; + } + return 0; +} + + +/** + * GPIO Read Data + * + * @param node Node GPIO block is on + * @param gpio_block GPIO block to access. Each block contains up to 64 GPIOs + * + * @return Status of the GPIO pins for the given block + */ +uint64_t bdk_gpio_read(bdk_node_t node, int gpio_block) +{ + bdk_gpio_rx_dat_t gpio_rx_dat; + switch (gpio_block) + { + case 0: + gpio_rx_dat.u = BDK_CSR_READ(node, BDK_GPIO_RX_DAT); + break; + case 1: + gpio_rx_dat.u = BDK_CSR_READ(node, BDK_GPIO_RX1_DAT); + break; + default: + bdk_error("GPIO block %d not supported\n", gpio_block); + gpio_rx_dat.u = 0; + break; + } + return gpio_rx_dat.s.dat; +} + + +/** + * GPIO Clear pin + * + * @param node Node GPIO block is on + * @param gpio_block GPIO block to access. Each block contains up to 64 GPIOs + * @param clear_mask Bit mask to indicate which bits to drive to '0'. + */ +void bdk_gpio_clear(bdk_node_t node, int gpio_block, uint64_t clear_mask) +{ + switch (gpio_block) + { + case 0: + BDK_CSR_WRITE(node, BDK_GPIO_TX_CLR, clear_mask); + break; + case 1: + BDK_CSR_WRITE(node, BDK_GPIO_TX1_CLR, clear_mask); + break; + default: + bdk_error("GPIO block %d not supported\n", gpio_block); + break; + } +} + + +/** + * GPIO Set pin + * + * @param node Node GPIO block is on + * @param gpio_block GPIO block to access. Each block contains up to 64 GPIOs + * @param set_mask Bit mask to indicate which bits to drive to '1'. + */ +void bdk_gpio_set(bdk_node_t node, int gpio_block, uint64_t set_mask) +{ + switch (gpio_block) + { + case 0: + BDK_CSR_WRITE(node, BDK_GPIO_TX_SET, set_mask); + break; + case 1: + BDK_CSR_WRITE(node, BDK_GPIO_TX1_SET, set_mask); + break; + default: + bdk_error("GPIO block %d not supported\n", gpio_block); + break; + } +} + + +/** GPIO Select pin + * + * @param node CPU node + * @param gpio GPIO number + * @param pin Pin number + */ +void bdk_gpio_select_pin(bdk_node_t node, int gpio, int pin) +{ + if ((gpio < 0) || (gpio >= bdk_gpio_get_num())) + { + bdk_warn("bdk_gpio_select_pin: Illegal GPIO %d\n", gpio); + return; + } + + BDK_CSR_MODIFY(c, node, BDK_GPIO_BIT_CFGX(gpio), c.s.pin_sel = pin); +} + + +/** + * Return the number of GPIO pins on this chip + * + * @return Number of GPIO pins + */ +int bdk_gpio_get_num(void) +{ + if (CAVIUM_IS_MODEL(CAVIUM_CN88XX)) + return 51; + else if (CAVIUM_IS_MODEL(CAVIUM_CN81XX)) + return 48; + else if (CAVIUM_IS_MODEL(CAVIUM_CN83XX)) + return 80; + else if (CAVIUM_IS_MODEL(CAVIUM_CN93XX)) + return 96; + else + { + bdk_error("bdk_gpio_get_num(): Unsupported chip"); + return 0; + } +} |