2009-05-29 04:23:52 +08:00
|
|
|
/*
|
|
|
|
* linux/arch/arm/mach-omap2/gpmc-smc91x.c
|
|
|
|
*
|
|
|
|
* Copyright (C) 2009 Nokia Corporation
|
|
|
|
* Contact: Tony Lindgren
|
|
|
|
*
|
|
|
|
* This program is free software; you can redistribute it and/or modify
|
|
|
|
* it under the terms of the GNU General Public License version 2 as
|
|
|
|
* published by the Free Software Foundation.
|
|
|
|
*/
|
|
|
|
|
|
|
|
#include <linux/kernel.h>
|
|
|
|
#include <linux/platform_device.h>
|
|
|
|
#include <linux/gpio.h>
|
|
|
|
#include <linux/delay.h>
|
|
|
|
#include <linux/interrupt.h>
|
|
|
|
#include <linux/io.h>
|
|
|
|
#include <linux/smc91x.h>
|
|
|
|
|
2012-10-05 13:07:27 +08:00
|
|
|
#include "gpmc.h"
|
2012-09-21 02:41:43 +08:00
|
|
|
#include "gpmc-smc91x.h"
|
2009-05-29 04:23:52 +08:00
|
|
|
|
2012-09-01 01:59:07 +08:00
|
|
|
#include "soc.h"
|
|
|
|
|
2009-05-29 04:23:52 +08:00
|
|
|
static struct omap_smc91x_platform_data *gpmc_cfg;
|
|
|
|
|
|
|
|
static struct resource gpmc_smc91x_resources[] = {
|
|
|
|
[0] = {
|
|
|
|
.flags = IORESOURCE_MEM,
|
|
|
|
},
|
|
|
|
[1] = {
|
|
|
|
.flags = IORESOURCE_IRQ,
|
|
|
|
},
|
|
|
|
};
|
|
|
|
|
|
|
|
static struct smc91x_platdata gpmc_smc91x_info = {
|
2009-12-12 08:16:33 +08:00
|
|
|
.flags = SMC91X_USE_16BIT | SMC91X_NOWAIT | SMC91X_IO_SHIFT_0,
|
|
|
|
.leda = RPC_LED_100_10,
|
|
|
|
.ledb = RPC_LED_TX_RX,
|
2009-05-29 04:23:52 +08:00
|
|
|
};
|
|
|
|
|
|
|
|
static struct platform_device gpmc_smc91x_device = {
|
|
|
|
.name = "smc91x",
|
|
|
|
.id = -1,
|
|
|
|
.dev = {
|
|
|
|
.platform_data = &gpmc_smc91x_info,
|
|
|
|
},
|
2009-12-12 08:16:33 +08:00
|
|
|
.num_resources = ARRAY_SIZE(gpmc_smc91x_resources),
|
|
|
|
.resource = gpmc_smc91x_resources,
|
2009-05-29 04:23:52 +08:00
|
|
|
};
|
|
|
|
|
2013-02-22 03:01:37 +08:00
|
|
|
static struct gpmc_settings smc91x_settings = {
|
|
|
|
.device_width = GPMC_DEVWIDTH_16BIT,
|
|
|
|
};
|
|
|
|
|
2009-05-29 04:23:52 +08:00
|
|
|
/*
|
|
|
|
* Set the gpmc timings for smc91c96. The timings are taken
|
|
|
|
* from the data sheet available at:
|
|
|
|
* http://www.smsc.com/main/catalog/lan91c96.html
|
|
|
|
* REVISIT: Level shifters can add at least to the access latency.
|
|
|
|
*/
|
|
|
|
static int smc91c96_gpmc_retime(void)
|
|
|
|
{
|
|
|
|
struct gpmc_timings t;
|
2012-08-17 13:59:14 +08:00
|
|
|
struct gpmc_device_timings dev_t;
|
2009-05-29 04:23:52 +08:00
|
|
|
const int t3 = 10; /* Figure 12.2 read and 12.4 write */
|
|
|
|
const int t4_r = 20; /* Figure 12.2 read */
|
|
|
|
const int t4_w = 5; /* Figure 12.4 write */
|
|
|
|
const int t5 = 25; /* Figure 12.2 read */
|
|
|
|
const int t6 = 15; /* Figure 12.2 read */
|
|
|
|
const int t7 = 5; /* Figure 12.4 write */
|
|
|
|
const int t8 = 5; /* Figure 12.4 write */
|
|
|
|
const int t20 = 185; /* Figure 12.2 read and 12.4 write */
|
|
|
|
|
|
|
|
/*
|
|
|
|
* FIXME: Calculate the address and data bus muxed timings.
|
|
|
|
* Note that at least adv_rd_off needs to be changed according
|
|
|
|
* to omap3430 TRM Figure 11-11. Are the sdp boards using the
|
|
|
|
* FPGA in between smc91x and omap as the timings are different
|
|
|
|
* from above?
|
|
|
|
*/
|
|
|
|
if (gpmc_cfg->flags & GPMC_MUX_ADD_DATA)
|
|
|
|
return 0;
|
|
|
|
|
2012-08-17 13:59:14 +08:00
|
|
|
memset(&dev_t, 0, sizeof(dev_t));
|
|
|
|
|
|
|
|
dev_t.t_oeasu = t3 * 1000;
|
|
|
|
dev_t.t_oe = t5 * 1000;
|
|
|
|
dev_t.t_cez_r = t4_r * 1000;
|
|
|
|
dev_t.t_oez = t6 * 1000;
|
|
|
|
dev_t.t_rd_cycle = (t20 - t3) * 1000;
|
|
|
|
|
|
|
|
dev_t.t_weasu = t3 * 1000;
|
|
|
|
dev_t.t_wpl = t7 * 1000;
|
|
|
|
dev_t.t_wph = t8 * 1000;
|
|
|
|
dev_t.t_cez_w = t4_w * 1000;
|
|
|
|
dev_t.t_wr_cycle = (t20 - t3) * 1000;
|
|
|
|
|
2013-02-22 03:01:37 +08:00
|
|
|
gpmc_calc_timings(&t, &smc91x_settings, &dev_t);
|
2012-08-17 13:59:14 +08:00
|
|
|
|
2009-05-29 04:23:52 +08:00
|
|
|
return gpmc_cs_set_timings(gpmc_cfg->cs, &t);
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Initialize smc91x device connected to the GPMC. Note that we
|
|
|
|
* assume that pin multiplexing is done in the board-*.c file,
|
|
|
|
* or in the bootloader.
|
|
|
|
*/
|
|
|
|
void __init gpmc_smc91x_init(struct omap_smc91x_platform_data *board_data)
|
|
|
|
{
|
|
|
|
unsigned long cs_mem_base;
|
|
|
|
int ret;
|
|
|
|
|
|
|
|
gpmc_cfg = board_data;
|
|
|
|
|
|
|
|
if (gpmc_cfg->flags & GPMC_TIMINGS_SMC91C96)
|
|
|
|
gpmc_cfg->retime = smc91c96_gpmc_retime;
|
|
|
|
|
|
|
|
if (gpmc_cs_request(gpmc_cfg->cs, SZ_16M, &cs_mem_base) < 0) {
|
|
|
|
printk(KERN_ERR "Failed to request GPMC mem for smc91x\n");
|
|
|
|
return;
|
|
|
|
}
|
|
|
|
|
|
|
|
gpmc_smc91x_resources[0].start = cs_mem_base + 0x300;
|
|
|
|
gpmc_smc91x_resources[0].end = cs_mem_base + 0x30f;
|
|
|
|
gpmc_smc91x_resources[1].flags |= (gpmc_cfg->flags & IRQF_TRIGGER_MASK);
|
|
|
|
|
2013-02-22 03:01:37 +08:00
|
|
|
if (gpmc_cfg->flags & GPMC_MUX_ADD_DATA)
|
|
|
|
smc91x_settings.mux_add_data = GPMC_MUX_AD;
|
|
|
|
if (gpmc_cfg->flags & GPMC_READ_MON)
|
|
|
|
smc91x_settings.wait_on_read = true;
|
|
|
|
if (gpmc_cfg->flags & GPMC_WRITE_MON)
|
|
|
|
smc91x_settings.wait_on_write = true;
|
|
|
|
if (gpmc_cfg->wait_pin)
|
|
|
|
smc91x_settings.wait_pin = gpmc_cfg->wait_pin;
|
|
|
|
ret = gpmc_cs_program_settings(gpmc_cfg->cs, &smc91x_settings);
|
|
|
|
if (ret < 0)
|
|
|
|
goto free1;
|
|
|
|
|
2009-05-29 04:23:52 +08:00
|
|
|
if (gpmc_cfg->retime) {
|
|
|
|
ret = gpmc_cfg->retime();
|
|
|
|
if (ret != 0)
|
|
|
|
goto free1;
|
|
|
|
}
|
|
|
|
|
2011-05-03 23:22:09 +08:00
|
|
|
if (gpio_request_one(gpmc_cfg->gpio_irq, GPIOF_IN, "SMC91X irq") < 0)
|
2009-05-29 04:23:52 +08:00
|
|
|
goto free1;
|
|
|
|
|
|
|
|
gpmc_smc91x_resources[1].start = gpio_to_irq(gpmc_cfg->gpio_irq);
|
|
|
|
|
|
|
|
if (gpmc_cfg->gpio_pwrdwn) {
|
2011-05-03 23:22:09 +08:00
|
|
|
ret = gpio_request_one(gpmc_cfg->gpio_pwrdwn,
|
|
|
|
GPIOF_OUT_INIT_LOW, "SMC91X powerdown");
|
2009-05-29 04:23:52 +08:00
|
|
|
if (ret)
|
|
|
|
goto free2;
|
|
|
|
}
|
|
|
|
|
|
|
|
if (gpmc_cfg->gpio_reset) {
|
2011-05-03 23:22:09 +08:00
|
|
|
ret = gpio_request_one(gpmc_cfg->gpio_reset,
|
|
|
|
GPIOF_OUT_INIT_LOW, "SMC91X reset");
|
2009-05-29 04:23:52 +08:00
|
|
|
if (ret)
|
|
|
|
goto free3;
|
|
|
|
|
|
|
|
gpio_set_value(gpmc_cfg->gpio_reset, 1);
|
|
|
|
msleep(100);
|
|
|
|
gpio_set_value(gpmc_cfg->gpio_reset, 0);
|
|
|
|
}
|
|
|
|
|
|
|
|
if (platform_device_register(&gpmc_smc91x_device) < 0) {
|
|
|
|
printk(KERN_ERR "Unable to register smc91x device\n");
|
|
|
|
gpio_free(gpmc_cfg->gpio_reset);
|
|
|
|
goto free3;
|
|
|
|
}
|
|
|
|
|
|
|
|
return;
|
|
|
|
|
|
|
|
free3:
|
|
|
|
if (gpmc_cfg->gpio_pwrdwn)
|
|
|
|
gpio_free(gpmc_cfg->gpio_pwrdwn);
|
|
|
|
free2:
|
|
|
|
gpio_free(gpmc_cfg->gpio_irq);
|
|
|
|
free1:
|
|
|
|
gpmc_cs_free(gpmc_cfg->cs);
|
|
|
|
|
|
|
|
printk(KERN_ERR "Could not initialize smc91x\n");
|
|
|
|
}
|