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Diffstat (limited to 'board/matrix_vision/mvblx/fpga.c')
| -rw-r--r-- | board/matrix_vision/mvblx/fpga.c | 219 |
1 files changed, 219 insertions, 0 deletions
diff --git a/board/matrix_vision/mvblx/fpga.c b/board/matrix_vision/mvblx/fpga.c new file mode 100644 index 0000000..dacc138 --- /dev/null +++ b/board/matrix_vision/mvblx/fpga.c @@ -0,0 +1,219 @@ +/* + * (C) Copyright 2002 + * Rich Ireland, Enterasys Networks, rireland@enterasys.com. + * Keith Outwater, keith_outwater@mvis.com. + * + * (C) Copyright 2011 + * Andre Schwarz, Matrix Vision GmbH, andre.schwarz@matrix-vision.de + * Michael Jones, Matrix Vision GmbH, michael.jones@matrix-vision.de + * + * See file CREDITS for list of people who contributed to this + * project. + * + * 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., 59 Temple Place, Suite 330, Boston, + * MA 02111-1307 USA + * + */ + +#include <common.h> +#include <ACEX1K.h> +#include <command.h> +#include <asm/gpio.h> +#include "fpga.h" + +#ifdef FPGA_DEBUG +#define fpga_debug(fmt, args...) printf("%s: "fmt, __func__, ##args) +#else +#define fpga_debug(fmt, args...) +#endif + +Altera_CYC2_Passive_Serial_fns altera_fns = { + fpga_null_fn, /* Altera_pre_fn */ + fpga_config_fn, + fpga_status_fn, + fpga_done_fn, + fpga_wr_fn, + fpga_null_fn, + fpga_null_fn, +}; + +Altera_desc cyclone2 = { + Altera_CYC2, + fast_passive_parallel, + Altera_EP3C5_SIZE, + (void *) &altera_fns, + NULL, + 0 +}; + +#define GPIO_RESET 43 +#define GPIO_DCLK 65 +#define GPIO_nSTATUS 157 +#define GPIO_CONF_DONE 158 +#define GPIO_nCONFIG 159 +#define GPIO_DATA0 54 +#define GPIO_DATA1 55 +#define GPIO_DATA2 56 +#define GPIO_DATA3 57 +#define GPIO_DATA4 58 +#define GPIO_DATA5 60 +#define GPIO_DATA6 61 +#define GPIO_DATA7 62 + +DECLARE_GLOBAL_DATA_PTR; + +/* return FPGA_SUCCESS on success, else FPGA_FAIL + */ +int mvblx_init_fpga(void) +{ + fpga_debug("Initializing FPGA interface\n"); + fpga_init(); + fpga_add(fpga_altera, &cyclone2); + + if (gpio_request(GPIO_DCLK, "dclk") || + gpio_request(GPIO_nSTATUS, "nStatus") || +#ifndef CONFIG_SYS_FPGA_DONT_USE_CONF_DONE + gpio_request(GPIO_CONF_DONE, "conf_done") || +#endif + gpio_request(GPIO_nCONFIG, "nConfig") || + gpio_request(GPIO_DATA0, "data0") || + gpio_request(GPIO_DATA1, "data1") || + gpio_request(GPIO_DATA2, "data2") || + gpio_request(GPIO_DATA3, "data3") || + gpio_request(GPIO_DATA4, "data4") || + gpio_request(GPIO_DATA5, "data5") || + gpio_request(GPIO_DATA6, "data6") || + gpio_request(GPIO_DATA7, "data7")) { + printf("%s: error requesting GPIOs.", __func__); + return FPGA_FAIL; + } + + /* set up outputs */ + gpio_direction_output(GPIO_DCLK, 0); + gpio_direction_output(GPIO_nCONFIG, 0); + gpio_direction_output(GPIO_DATA0, 0); + gpio_direction_output(GPIO_DATA1, 0); + gpio_direction_output(GPIO_DATA2, 0); + gpio_direction_output(GPIO_DATA3, 0); + gpio_direction_output(GPIO_DATA4, 0); + gpio_direction_output(GPIO_DATA5, 0); + gpio_direction_output(GPIO_DATA6, 0); + gpio_direction_output(GPIO_DATA7, 0); + + /* NB omap_free_gpio() resets to an input, so we can't + * free ie. nCONFIG, or else the FPGA would reset + * Q: presumably gpio_free() has the same effect? + */ + + /* set up inputs */ + gpio_direction_input(GPIO_nSTATUS); +#ifndef CONFIG_SYS_FPGA_DONT_USE_CONF_DONE + gpio_direction_input(GPIO_CONF_DONE); +#endif + + fpga_config_fn(0, 1, 0); + udelay(60); + + return FPGA_SUCCESS; +} + +int fpga_null_fn(int cookie) +{ + return 0; +} + +int fpga_config_fn(int assert, int flush, int cookie) +{ + fpga_debug("SET config : %s=%d\n", assert ? "low" : "high", assert); + if (flush) { + gpio_set_value(GPIO_nCONFIG, !assert); + udelay(1); + gpio_set_value(GPIO_nCONFIG, assert); + } + + return assert; +} + +int fpga_done_fn(int cookie) +{ + int result = 0; + + /* since revA of BLX, we will not get this signal. */ + udelay(10); +#ifdef CONFIG_SYS_FPGA_DONT_USE_CONF_DONE + fpga_debug("not waiting for CONF_DONE."); + result = 1; +#else + fpga_debug("CONF_DONE check ... "); + if (gpio_get_value(GPIO_CONF_DONE)) { + fpga_debug("high\n"); + result = 1; + } else + fpga_debug("low\n"); + gpio_free(GPIO_CONF_DONE); +#endif + + return result; +} + +int fpga_status_fn(int cookie) +{ + int result = 0; + fpga_debug("STATUS check ... "); + + result = gpio_get_value(GPIO_nSTATUS); + + if (result < 0) + fpga_debug("error\n"); + else if (result > 0) + fpga_debug("high\n"); + else + fpga_debug("low\n"); + + return result; +} + +static inline int _write_fpga(u8 byte) +{ + gpio_set_value(GPIO_DATA0, byte & 0x01); + gpio_set_value(GPIO_DATA1, (byte >> 1) & 0x01); + gpio_set_value(GPIO_DATA2, (byte >> 2) & 0x01); + gpio_set_value(GPIO_DATA3, (byte >> 3) & 0x01); + gpio_set_value(GPIO_DATA4, (byte >> 4) & 0x01); + gpio_set_value(GPIO_DATA5, (byte >> 5) & 0x01); + gpio_set_value(GPIO_DATA6, (byte >> 6) & 0x01); + gpio_set_value(GPIO_DATA7, (byte >> 7) & 0x01); + + /* clock */ + gpio_set_value(GPIO_DCLK, 1); + udelay(1); + gpio_set_value(GPIO_DCLK, 0); + udelay(1); + + return 0; +} + +int fpga_wr_fn(const void *buf, size_t len, int flush, int cookie) +{ + unsigned char *data = (unsigned char *) buf; + int i; + + fpga_debug("fpga_wr: buf %p / size %d\n", buf, len); + for (i = 0; i < len; i++) + _write_fpga(data[i]); + fpga_debug("-%s\n", __func__); + + return FPGA_SUCCESS; +} |