diff options
Diffstat (limited to 'meta-facebook/meta-wedge/recipes-wedge/bitbang/files/src/mdio_bb.c')
| -rw-r--r-- | meta-facebook/meta-wedge/recipes-wedge/bitbang/files/src/mdio_bb.c | 336 |
1 files changed, 0 insertions, 336 deletions
diff --git a/meta-facebook/meta-wedge/recipes-wedge/bitbang/files/src/mdio_bb.c b/meta-facebook/meta-wedge/recipes-wedge/bitbang/files/src/mdio_bb.c deleted file mode 100644 index ef0c567..0000000 --- a/meta-facebook/meta-wedge/recipes-wedge/bitbang/files/src/mdio_bb.c +++ /dev/null @@ -1,336 +0,0 @@ -/* - * Copyright 2014-present Facebook. All Rights Reserved. - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; either version 2 of the License, or - * (at your option) any later version. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. - */ -//#define DEBUG -//#define VERBOSE - -#include "bitbang.h" -#include "gpio.h" - -#include <stdlib.h> -#include <unistd.h> - -#include "facebook/log.h" - - -typedef struct { - gpio_st m_mdc; - gpio_st m_mdio; -} mdio_context_st; - -/* - * 32b preamble, 2b start of frame, 2b operation code, - * 5b phy addr, 5b register addr, 2b turnaround, 16b data - */ -#define N_BITS (32 + 2 + 2 + 5 + 5 + 2 + 16) -#define N_BYTES (N_BITS + 7 / 8) - -#define START_OF_FRAME 0x1 -#define OP_READ 0x2 -#define OP_WRITE 0x1 -#define TURNAROUND 0x2 /* TA for write, for read, phy sends out TA */ - -void usage() -{ - fprintf(stderr, - "Usage:\n" - "mdio-bb: -c <GPIO for MDC> [-C <HIGH|low>]\n" - " -d <GPIO for MDIO> [-O <rising|FALLING>]\n" - " [-I <RISING|falling>] [-p] [-b]\n" - " <read|write> <phy address> <register address>\n" - " [value to write]\n"); -} - -bitbang_pin_value_en mdio_pin_f( - bitbang_pin_type_en pin, bitbang_pin_value_en value, void *context) -{ - mdio_context_st *ctx = (mdio_context_st *)context; - gpio_st *gpio; - bitbang_pin_value_en res; - - switch (pin) { - case BITBANG_CLK_PIN: - gpio = &ctx->m_mdc; - break; - case BITBANG_DATA_IN: - case BITBANG_DATA_OUT: - gpio = &ctx->m_mdio; - break; - } - if (pin == BITBANG_DATA_IN) { - res = gpio_read(gpio) ? BITBANG_PIN_HIGH : BITBANG_PIN_LOW; - } else { - res = value; - gpio_write(gpio, ((res == BITBANG_PIN_HIGH) - ? GPIO_VALUE_HIGH : GPIO_VALUE_LOW)); - } - return res; -} - -int main(int argc, char* const argv[]) -{ - int opt; - int mdc = -1, mdio = -1; - bitbang_pin_value_en mdc_start = BITBANG_PIN_HIGH; - bitbang_clk_edge_en out_edge = BITBANG_CLK_EDGE_FALLING; - bitbang_clk_edge_en in_edge = BITBANG_CLK_EDGE_RISING; - int is_write; - uint32_t phy_addr; - uint32_t reg_addr; - uint32_t data; /* data to write/read*/ - uint8_t buf[N_BYTES]; - uint8_t *buf_p; - mdio_context_st ctx; - bitbang_init_st init; - bitbang_handle_st *hdl = NULL; - bitbang_io_st io; - int n_bits; - int i; - int rc = 0; - int preamble = 0; - int binary = 0; - - while ((opt = getopt(argc, argv, "bc:C:d:D:p")) != -1) { - switch (opt) { - case 'b': - binary = 1; - break; - case 'c': - mdc = atoi(optarg); - break; - case 'C': - if (!strcasecmp(optarg, "high")) { - mdc_start = BITBANG_PIN_HIGH; - } else if (!strcasecmp(optarg, "low")) { - mdc_start = BITBANG_PIN_LOW; - } else { - usage(); - exit(-1); - } - break; - case 'd': - mdio = atoi(optarg); - break; - case 'I': - if (!strcasecmp(optarg, "rising")) { - in_edge = BITBANG_CLK_EDGE_RISING; - } if (!strcasecmp(optarg, "falling")) { - in_edge = BITBANG_CLK_EDGE_FALLING; - } else { - usage(); - exit(-1); - } - break; - case 'O': - if (!strcasecmp(optarg, "rising")) { - out_edge = BITBANG_CLK_EDGE_RISING; - } if (!strcasecmp(optarg, "falling")) { - out_edge = BITBANG_CLK_EDGE_FALLING; - } else { - usage(); - exit(-1); - } - break; - case 'p': - preamble = 1; - break; - default: - usage(); - exit(-1); - } - } - - if (mdc < 0 || mdio < 0) { - usage(); - exit(-1); - } - - if (optind + 2 >= argc) { - usage(); - exit(-1); - } - - /* read or write */ - if (!strcasecmp(argv[optind], "read")) { - is_write = 0; - } else if (!strcasecmp(argv[optind], "write")) { - is_write = 1; - } else { - usage(); - exit(-1); - } - - /* phy address, 5 bits only, so must be <= 0x1f */ - phy_addr = strtoul(argv[optind + 1], NULL, 0); - if (phy_addr > 0x1f) { - usage(); - exit(-1); - } - - /* register address, 5 bits only, so must be <= 0x1f */ - reg_addr = strtoul(argv[optind + 2], NULL, 0); - if (reg_addr > 0x1f) { - usage(); - exit(-1); - } - - /* data */ - if (is_write) { - if ((!binary && (optind + 4 != argc)) || - (binary && (optind + 3 != argc))) { - usage(); - exit(-1); - } - if (binary) { - uint16_t temp = 0; - if (fread(&temp, sizeof(temp), 1, stdin) != 1) { - usage(); - exit(-1); - } - data = htons(temp); - } else { - data = strtoul(argv[optind + 3], NULL, 0); - } - if (data > 0xFFFF) { - usage(); - exit(-1); - } - } else { - if ((!binary && (optind + 3 != argc)) || - (binary && (optind + 2 != argc))) { - usage(); - exit(-1); - } - } - - /* open all gpio */ - memset(&ctx, sizeof(ctx), 0); - gpio_init_default(&ctx.m_mdc); - gpio_init_default(&ctx.m_mdio); - if (gpio_open(&ctx.m_mdc, mdc) || gpio_open(&ctx.m_mdio, mdio)) { - goto out; - } - - if (gpio_change_direction(&ctx.m_mdc, GPIO_DIRECTION_OUT) - || gpio_change_direction(&ctx.m_mdio, GPIO_DIRECTION_OUT)) { - goto out; - } - - bitbang_init_default(&init); - init.bbi_clk_start = mdc_start; - init.bbi_data_out = out_edge; - init.bbi_data_in = in_edge; - init.bbi_freq = 1000 * 1000; /* 1M Hz */ - init.bbi_pin_f = mdio_pin_f; - init.bbi_context = &ctx; - hdl = bitbang_open(&init); - if (!hdl) { - goto out; - } - - if (is_write) { - buf[0] = (data >> 8) & 0xFF; - buf[1] = data & 0xFF; - io.bbio_out_bits = 16; - io.bbio_dout = buf; - io.bbio_in_bits = 0; - io.bbio_din = NULL; - } else { - io.bbio_in_bits = 16; - io.bbio_din = buf; - io.bbio_out_bits = 0; - io.bbio_dout = NULL; - } - - /* preamble, 32b */ - buf_p = buf; - n_bits = 0; - if (preamble) { - /* 32 bit of 1 for preamble */ - for (i = 0; i < 4; i++) { - *buf_p++ = 0xFF; - } - n_bits += 32; - } - - /* - * MDIO transaction header is: - * 2b START, 2b OPER CODE, 5b PHY ADDR, 5b register addr, 2b TURNROUND - */ - *buf_p++ = (START_OF_FRAME << 6) | (((is_write) ? OP_WRITE : OP_READ) << 4) - | ((phy_addr >> 1) & 0xF); - *buf_p++ = ((phy_addr & 0x1) << 7) | ((reg_addr & 0x1F) << 2) | TURNAROUND; - if (is_write) { - *buf_p++ = (data >> 8) & 0xFF; - *buf_p++ = data & 0xFF; - /* total # of bits is transaction header + 2 bytes to write */ - n_bits += 2 + 2 + 5 + 5 + 2 + 16; - } else { - /* for read, master does not send TR, so, n_bits should not include TR */ - n_bits += 2 + 2 + 5 + 5; - } - - memset(&io, sizeof(io), 0); - io.bbio_out_bits = n_bits; - io.bbio_dout = buf; - io.bbio_in_bits = 0; - io.bbio_din = NULL; - - rc = bitbang_io(hdl, &io); - if (rc != 0) { - goto out; - } - - /* for read, need to do another io for (2b TR + 16b data) reading */ - if (!is_write) { - /* first, change the MDIO to input */ - gpio_change_direction(&ctx.m_mdio, GPIO_DIRECTION_IN); - /* then, run the clock for read */ - memset(&io, sizeof(io), 0); - io.bbio_out_bits = 0; - io.bbio_dout = NULL;; - io.bbio_in_bits = 18; - io.bbio_din = buf; - - rc = bitbang_io(hdl, &io); - if (rc != 0) { - goto out; - } - - data = ((buf[0] << 2) | (buf[1] >> 6)) & 0xFF; - data <<= 8; - data |= ((buf[1] << 2) | (buf[2] >> 6)) & 0xFF; - } - - if (binary) { - if (!is_write) { - uint16_t temp = ntohs(data); - fwrite(&temp, sizeof(temp), 1, stdout); - } - } else { - printf("%s: 0x%02x\n", (is_write) ? "Wrote" : "Read", data); - } - - out: - if (hdl) { - bitbang_close(hdl); - } - gpio_close(&ctx.m_mdc); - gpio_close(&ctx.m_mdio); - - return 0; -} |
