Michael Jones | 8ce85da | 2011-11-04 13:53:44 -0400 | [diff] [blame] | 1 | /* |
| 2 | * (C) Copyright 2002 |
| 3 | * Rich Ireland, Enterasys Networks, rireland@enterasys.com. |
| 4 | * Keith Outwater, keith_outwater@mvis.com. |
| 5 | * |
| 6 | * (C) Copyright 2011 |
| 7 | * Andre Schwarz, Matrix Vision GmbH, andre.schwarz@matrix-vision.de |
| 8 | * Michael Jones, Matrix Vision GmbH, michael.jones@matrix-vision.de |
| 9 | * |
Wolfgang Denk | d79de1d | 2013-07-08 09:37:19 +0200 | [diff] [blame^] | 10 | * SPDX-License-Identifier: GPL-2.0+ |
Michael Jones | 8ce85da | 2011-11-04 13:53:44 -0400 | [diff] [blame] | 11 | */ |
| 12 | |
| 13 | #include <common.h> |
| 14 | #include <ACEX1K.h> |
| 15 | #include <command.h> |
| 16 | #include <asm/gpio.h> |
Michael Jones | 552613c | 2013-02-07 23:53:37 +0000 | [diff] [blame] | 17 | #include <linux/byteorder/generic.h> |
Michael Jones | 8ce85da | 2011-11-04 13:53:44 -0400 | [diff] [blame] | 18 | #include "fpga.h" |
| 19 | |
| 20 | #ifdef FPGA_DEBUG |
| 21 | #define fpga_debug(fmt, args...) printf("%s: "fmt, __func__, ##args) |
| 22 | #else |
| 23 | #define fpga_debug(fmt, args...) |
| 24 | #endif |
| 25 | |
| 26 | Altera_CYC2_Passive_Serial_fns altera_fns = { |
| 27 | fpga_null_fn, /* Altera_pre_fn */ |
| 28 | fpga_config_fn, |
| 29 | fpga_status_fn, |
| 30 | fpga_done_fn, |
| 31 | fpga_wr_fn, |
| 32 | fpga_null_fn, |
| 33 | fpga_null_fn, |
| 34 | }; |
| 35 | |
| 36 | Altera_desc cyclone2 = { |
| 37 | Altera_CYC2, |
| 38 | fast_passive_parallel, |
| 39 | Altera_EP3C5_SIZE, |
| 40 | (void *) &altera_fns, |
| 41 | NULL, |
| 42 | 0 |
| 43 | }; |
| 44 | |
| 45 | #define GPIO_RESET 43 |
| 46 | #define GPIO_DCLK 65 |
| 47 | #define GPIO_nSTATUS 157 |
| 48 | #define GPIO_CONF_DONE 158 |
| 49 | #define GPIO_nCONFIG 159 |
| 50 | #define GPIO_DATA0 54 |
| 51 | #define GPIO_DATA1 55 |
| 52 | #define GPIO_DATA2 56 |
| 53 | #define GPIO_DATA3 57 |
| 54 | #define GPIO_DATA4 58 |
| 55 | #define GPIO_DATA5 60 |
| 56 | #define GPIO_DATA6 61 |
| 57 | #define GPIO_DATA7 62 |
| 58 | |
| 59 | DECLARE_GLOBAL_DATA_PTR; |
| 60 | |
| 61 | /* return FPGA_SUCCESS on success, else FPGA_FAIL |
| 62 | */ |
| 63 | int mvblx_init_fpga(void) |
| 64 | { |
| 65 | fpga_debug("Initializing FPGA interface\n"); |
| 66 | fpga_init(); |
| 67 | fpga_add(fpga_altera, &cyclone2); |
| 68 | |
| 69 | if (gpio_request(GPIO_DCLK, "dclk") || |
| 70 | gpio_request(GPIO_nSTATUS, "nStatus") || |
| 71 | #ifndef CONFIG_SYS_FPGA_DONT_USE_CONF_DONE |
| 72 | gpio_request(GPIO_CONF_DONE, "conf_done") || |
| 73 | #endif |
| 74 | gpio_request(GPIO_nCONFIG, "nConfig") || |
| 75 | gpio_request(GPIO_DATA0, "data0") || |
| 76 | gpio_request(GPIO_DATA1, "data1") || |
| 77 | gpio_request(GPIO_DATA2, "data2") || |
| 78 | gpio_request(GPIO_DATA3, "data3") || |
| 79 | gpio_request(GPIO_DATA4, "data4") || |
| 80 | gpio_request(GPIO_DATA5, "data5") || |
| 81 | gpio_request(GPIO_DATA6, "data6") || |
| 82 | gpio_request(GPIO_DATA7, "data7")) { |
| 83 | printf("%s: error requesting GPIOs.", __func__); |
| 84 | return FPGA_FAIL; |
| 85 | } |
| 86 | |
| 87 | /* set up outputs */ |
| 88 | gpio_direction_output(GPIO_DCLK, 0); |
| 89 | gpio_direction_output(GPIO_nCONFIG, 0); |
| 90 | gpio_direction_output(GPIO_DATA0, 0); |
| 91 | gpio_direction_output(GPIO_DATA1, 0); |
| 92 | gpio_direction_output(GPIO_DATA2, 0); |
| 93 | gpio_direction_output(GPIO_DATA3, 0); |
| 94 | gpio_direction_output(GPIO_DATA4, 0); |
| 95 | gpio_direction_output(GPIO_DATA5, 0); |
| 96 | gpio_direction_output(GPIO_DATA6, 0); |
| 97 | gpio_direction_output(GPIO_DATA7, 0); |
| 98 | |
| 99 | /* NB omap_free_gpio() resets to an input, so we can't |
| 100 | * free ie. nCONFIG, or else the FPGA would reset |
| 101 | * Q: presumably gpio_free() has the same effect? |
| 102 | */ |
| 103 | |
| 104 | /* set up inputs */ |
| 105 | gpio_direction_input(GPIO_nSTATUS); |
| 106 | #ifndef CONFIG_SYS_FPGA_DONT_USE_CONF_DONE |
| 107 | gpio_direction_input(GPIO_CONF_DONE); |
| 108 | #endif |
| 109 | |
| 110 | fpga_config_fn(0, 1, 0); |
| 111 | udelay(60); |
| 112 | |
| 113 | return FPGA_SUCCESS; |
| 114 | } |
| 115 | |
| 116 | int fpga_null_fn(int cookie) |
| 117 | { |
| 118 | return 0; |
| 119 | } |
| 120 | |
| 121 | int fpga_config_fn(int assert, int flush, int cookie) |
| 122 | { |
| 123 | fpga_debug("SET config : %s=%d\n", assert ? "low" : "high", assert); |
| 124 | if (flush) { |
| 125 | gpio_set_value(GPIO_nCONFIG, !assert); |
| 126 | udelay(1); |
| 127 | gpio_set_value(GPIO_nCONFIG, assert); |
| 128 | } |
| 129 | |
| 130 | return assert; |
| 131 | } |
| 132 | |
| 133 | int fpga_done_fn(int cookie) |
| 134 | { |
| 135 | int result = 0; |
| 136 | |
| 137 | /* since revA of BLX, we will not get this signal. */ |
| 138 | udelay(10); |
| 139 | #ifdef CONFIG_SYS_FPGA_DONT_USE_CONF_DONE |
| 140 | fpga_debug("not waiting for CONF_DONE."); |
| 141 | result = 1; |
| 142 | #else |
| 143 | fpga_debug("CONF_DONE check ... "); |
| 144 | if (gpio_get_value(GPIO_CONF_DONE)) { |
| 145 | fpga_debug("high\n"); |
| 146 | result = 1; |
| 147 | } else |
| 148 | fpga_debug("low\n"); |
| 149 | gpio_free(GPIO_CONF_DONE); |
| 150 | #endif |
| 151 | |
| 152 | return result; |
| 153 | } |
| 154 | |
| 155 | int fpga_status_fn(int cookie) |
| 156 | { |
| 157 | int result = 0; |
| 158 | fpga_debug("STATUS check ... "); |
| 159 | |
| 160 | result = gpio_get_value(GPIO_nSTATUS); |
| 161 | |
| 162 | if (result < 0) |
| 163 | fpga_debug("error\n"); |
| 164 | else if (result > 0) |
| 165 | fpga_debug("high\n"); |
| 166 | else |
| 167 | fpga_debug("low\n"); |
| 168 | |
| 169 | return result; |
| 170 | } |
| 171 | |
| 172 | static inline int _write_fpga(u8 byte) |
| 173 | { |
| 174 | gpio_set_value(GPIO_DATA0, byte & 0x01); |
| 175 | gpio_set_value(GPIO_DATA1, (byte >> 1) & 0x01); |
| 176 | gpio_set_value(GPIO_DATA2, (byte >> 2) & 0x01); |
| 177 | gpio_set_value(GPIO_DATA3, (byte >> 3) & 0x01); |
| 178 | gpio_set_value(GPIO_DATA4, (byte >> 4) & 0x01); |
| 179 | gpio_set_value(GPIO_DATA5, (byte >> 5) & 0x01); |
| 180 | gpio_set_value(GPIO_DATA6, (byte >> 6) & 0x01); |
| 181 | gpio_set_value(GPIO_DATA7, (byte >> 7) & 0x01); |
| 182 | |
| 183 | /* clock */ |
| 184 | gpio_set_value(GPIO_DCLK, 1); |
| 185 | udelay(1); |
| 186 | gpio_set_value(GPIO_DCLK, 0); |
| 187 | udelay(1); |
| 188 | |
| 189 | return 0; |
| 190 | } |
| 191 | |
| 192 | int fpga_wr_fn(const void *buf, size_t len, int flush, int cookie) |
| 193 | { |
| 194 | unsigned char *data = (unsigned char *) buf; |
| 195 | int i; |
Michael Jones | 552613c | 2013-02-07 23:53:37 +0000 | [diff] [blame] | 196 | int headerlen = len - cyclone2.size; |
| 197 | |
| 198 | if (headerlen < 0) |
| 199 | return FPGA_FAIL; |
| 200 | else if (headerlen == sizeof(uint32_t)) { |
| 201 | const unsigned int fpgavers_len = 11; /* '0x' + 8 hex digits + \0 */ |
| 202 | char fpgavers_str[fpgavers_len]; |
| 203 | snprintf(fpgavers_str, fpgavers_len, "0x%08x", |
| 204 | be32_to_cpup((uint32_t*)data)); |
| 205 | setenv("fpgavers", fpgavers_str); |
| 206 | } |
Michael Jones | 8ce85da | 2011-11-04 13:53:44 -0400 | [diff] [blame] | 207 | |
| 208 | fpga_debug("fpga_wr: buf %p / size %d\n", buf, len); |
Michael Jones | 552613c | 2013-02-07 23:53:37 +0000 | [diff] [blame] | 209 | for (i = headerlen; i < len; i++) |
Michael Jones | 8ce85da | 2011-11-04 13:53:44 -0400 | [diff] [blame] | 210 | _write_fpga(data[i]); |
| 211 | fpga_debug("-%s\n", __func__); |
| 212 | |
| 213 | return FPGA_SUCCESS; |
| 214 | } |