| /* |
| * (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 |
| * |
| * SPDX-License-Identifier: GPL-2.0+ |
| */ |
| |
| #include <common.h> |
| #include <ACEX1K.h> |
| #include <command.h> |
| #include <asm/gpio.h> |
| #include <linux/byteorder/generic.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; |
| int headerlen = len - cyclone2.size; |
| |
| if (headerlen < 0) |
| return FPGA_FAIL; |
| else if (headerlen == sizeof(uint32_t)) { |
| const unsigned int fpgavers_len = 11; /* '0x' + 8 hex digits + \0 */ |
| char fpgavers_str[fpgavers_len]; |
| snprintf(fpgavers_str, fpgavers_len, "0x%08x", |
| be32_to_cpup((uint32_t*)data)); |
| setenv("fpgavers", fpgavers_str); |
| } |
| |
| fpga_debug("fpga_wr: buf %p / size %d\n", buf, len); |
| for (i = headerlen; i < len; i++) |
| _write_fpga(data[i]); |
| fpga_debug("-%s\n", __func__); |
| |
| return FPGA_SUCCESS; |
| } |