215 lines
		
	
	
		
			4.9 KiB
		
	
	
	
		
			C
		
	
	
	
			
		
		
	
	
			215 lines
		
	
	
		
			4.9 KiB
		
	
	
	
		
			C
		
	
	
	
| /*
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|  * (C) Copyright 2002
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|  * Rich Ireland, Enterasys Networks, rireland@enterasys.com.
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|  * Keith Outwater, keith_outwater@mvis.com.
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|  *
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|  * (C) Copyright 2011
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|  * Andre Schwarz, Matrix Vision GmbH, andre.schwarz@matrix-vision.de
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|  * Michael Jones, Matrix Vision GmbH, michael.jones@matrix-vision.de
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|  *
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|  * SPDX-License-Identifier:	GPL-2.0+
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|  */
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| 
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| #include <common.h>
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| #include <ACEX1K.h>
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| #include <command.h>
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| #include <asm/gpio.h>
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| #include <linux/byteorder/generic.h>
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| #include "fpga.h"
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| 
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| #ifdef FPGA_DEBUG
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| #define fpga_debug(fmt, args...)      printf("%s: "fmt, __func__, ##args)
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| #else
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| #define fpga_debug(fmt, args...)
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| #endif
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| 
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| Altera_CYC2_Passive_Serial_fns altera_fns = {
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| 	fpga_null_fn,   /* Altera_pre_fn */
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| 	fpga_config_fn,
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| 	fpga_status_fn,
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| 	fpga_done_fn,
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| 	fpga_wr_fn,
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| 	fpga_null_fn,
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| 	fpga_null_fn,
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| };
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| 
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| Altera_desc cyclone2 = {
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| 	Altera_CYC2,
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| 	fast_passive_parallel,
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| 	Altera_EP3C5_SIZE,
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| 	(void *) &altera_fns,
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| 	NULL,
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| 	0
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| };
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| 
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| #define GPIO_RESET		43
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| #define GPIO_DCLK		65
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| #define GPIO_nSTATUS	157
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| #define GPIO_CONF_DONE	158
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| #define GPIO_nCONFIG	159
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| #define GPIO_DATA0		54
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| #define GPIO_DATA1		55
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| #define GPIO_DATA2		56
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| #define GPIO_DATA3		57
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| #define GPIO_DATA4		58
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| #define GPIO_DATA5		60
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| #define GPIO_DATA6		61
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| #define GPIO_DATA7		62
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| 
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| DECLARE_GLOBAL_DATA_PTR;
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| 
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| /* return FPGA_SUCCESS on success, else FPGA_FAIL
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|  */
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| int mvblx_init_fpga(void)
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| {
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| 	fpga_debug("Initializing FPGA interface\n");
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| 	fpga_init();
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| 	fpga_add(fpga_altera, &cyclone2);
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| 
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| 	if (gpio_request(GPIO_DCLK, "dclk") ||
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| 			gpio_request(GPIO_nSTATUS, "nStatus") ||
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| #ifndef CONFIG_SYS_FPGA_DONT_USE_CONF_DONE
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| 			gpio_request(GPIO_CONF_DONE, "conf_done") ||
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| #endif
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| 			gpio_request(GPIO_nCONFIG, "nConfig") ||
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| 			gpio_request(GPIO_DATA0, "data0") ||
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| 			gpio_request(GPIO_DATA1, "data1") ||
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| 			gpio_request(GPIO_DATA2, "data2") ||
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| 			gpio_request(GPIO_DATA3, "data3") ||
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| 			gpio_request(GPIO_DATA4, "data4") ||
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| 			gpio_request(GPIO_DATA5, "data5") ||
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| 			gpio_request(GPIO_DATA6, "data6") ||
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| 			gpio_request(GPIO_DATA7, "data7")) {
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| 		printf("%s: error requesting GPIOs.", __func__);
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| 		return FPGA_FAIL;
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| 	}
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| 
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| 	/* set up outputs */
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| 	gpio_direction_output(GPIO_DCLK,  0);
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| 	gpio_direction_output(GPIO_nCONFIG, 0);
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| 	gpio_direction_output(GPIO_DATA0, 0);
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| 	gpio_direction_output(GPIO_DATA1, 0);
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| 	gpio_direction_output(GPIO_DATA2, 0);
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| 	gpio_direction_output(GPIO_DATA3, 0);
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| 	gpio_direction_output(GPIO_DATA4, 0);
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| 	gpio_direction_output(GPIO_DATA5, 0);
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| 	gpio_direction_output(GPIO_DATA6, 0);
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| 	gpio_direction_output(GPIO_DATA7, 0);
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| 
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| 	/* NB omap_free_gpio() resets to an input, so we can't
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| 	 * free ie. nCONFIG, or else the FPGA would reset
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| 	 * Q: presumably gpio_free() has the same effect?
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| 	 */
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| 
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| 	/* set up inputs */
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| 	gpio_direction_input(GPIO_nSTATUS);
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| #ifndef CONFIG_SYS_FPGA_DONT_USE_CONF_DONE
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| 	gpio_direction_input(GPIO_CONF_DONE);
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| #endif
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| 
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| 	fpga_config_fn(0, 1, 0);
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| 	udelay(60);
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| 
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| 	return FPGA_SUCCESS;
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| }
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| 
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| int fpga_null_fn(int cookie)
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| {
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| 	return 0;
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| }
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| 
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| int fpga_config_fn(int assert, int flush, int cookie)
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| {
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| 	fpga_debug("SET config : %s=%d\n", assert ? "low" : "high", assert);
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| 	if (flush) {
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| 		gpio_set_value(GPIO_nCONFIG, !assert);
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| 		udelay(1);
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| 		gpio_set_value(GPIO_nCONFIG, assert);
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| 	}
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| 
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| 	return assert;
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| }
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| 
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| int fpga_done_fn(int cookie)
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| {
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| 	int result = 0;
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| 
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| 	/* since revA of BLX, we will not get this signal. */
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| 	udelay(10);
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| #ifdef CONFIG_SYS_FPGA_DONT_USE_CONF_DONE
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| 	fpga_debug("not waiting for CONF_DONE.");
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| 	result = 1;
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| #else
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| 	fpga_debug("CONF_DONE check ... ");
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| 	if (gpio_get_value(GPIO_CONF_DONE))  {
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| 		fpga_debug("high\n");
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| 		result = 1;
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| 	} else
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| 		fpga_debug("low\n");
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| 	gpio_free(GPIO_CONF_DONE);
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| #endif
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| 
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| 	return result;
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| }
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| 
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| int fpga_status_fn(int cookie)
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| {
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| 	int result = 0;
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| 	fpga_debug("STATUS check ... ");
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| 
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| 	result = gpio_get_value(GPIO_nSTATUS);
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| 
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| 	if (result < 0)
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| 		fpga_debug("error\n");
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| 	else if (result > 0)
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| 		fpga_debug("high\n");
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| 	else
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| 		fpga_debug("low\n");
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| 
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| 	return result;
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| }
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| 
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| static inline int _write_fpga(u8 byte)
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| {
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| 	gpio_set_value(GPIO_DATA0, byte & 0x01);
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| 	gpio_set_value(GPIO_DATA1, (byte >> 1) & 0x01);
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| 	gpio_set_value(GPIO_DATA2, (byte >> 2) & 0x01);
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| 	gpio_set_value(GPIO_DATA3, (byte >> 3) & 0x01);
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| 	gpio_set_value(GPIO_DATA4, (byte >> 4) & 0x01);
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| 	gpio_set_value(GPIO_DATA5, (byte >> 5) & 0x01);
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| 	gpio_set_value(GPIO_DATA6, (byte >> 6) & 0x01);
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| 	gpio_set_value(GPIO_DATA7, (byte >> 7) & 0x01);
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| 
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| 	/* clock */
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| 	gpio_set_value(GPIO_DCLK, 1);
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| 	udelay(1);
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| 	gpio_set_value(GPIO_DCLK, 0);
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| 	udelay(1);
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| 
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| 	return 0;
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| }
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| 
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| int fpga_wr_fn(const void *buf, size_t len, int flush, int cookie)
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| {
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| 	unsigned char *data = (unsigned char *) buf;
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| 	int i;
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| 	int headerlen = len - cyclone2.size;
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| 
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| 	if (headerlen < 0)
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| 		return FPGA_FAIL;
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| 	else if (headerlen == sizeof(uint32_t)) {
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| 		const unsigned int fpgavers_len = 11; /* '0x' + 8 hex digits + \0 */
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| 		char fpgavers_str[fpgavers_len];
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| 		snprintf(fpgavers_str, fpgavers_len, "0x%08x",
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| 				be32_to_cpup((uint32_t*)data));
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| 		setenv("fpgavers", fpgavers_str);
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| 	}
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| 
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| 	fpga_debug("fpga_wr: buf %p / size %d\n", buf, len);
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| 	for (i = headerlen; i < len; i++)
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| 		_write_fpga(data[i]);
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| 	fpga_debug("-%s\n", __func__);
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| 
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| 	return FPGA_SUCCESS;
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| }
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