319 lines
6.6 KiB
C
319 lines
6.6 KiB
C
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/*
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* device.c -- common ColdFire SoC device support
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*
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* (C) Copyright 2011, Greg Ungerer <gerg@uclinux.org>
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*
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* This file is subject to the terms and conditions of the GNU General Public
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* License. See the file COPYING in the main directory of this archive
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* for more details.
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*/
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#include <linux/kernel.h>
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#include <linux/init.h>
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#include <linux/io.h>
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#include <linux/spi/spi.h>
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#include <linux/gpio.h>
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#include <asm/traps.h>
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#include <asm/coldfire.h>
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#include <asm/mcfsim.h>
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#include <asm/mcfuart.h>
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#include <asm/mcfqspi.h>
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/*
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* All current ColdFire parts contain from 2, 3 or 4 UARTS.
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*/
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static struct mcf_platform_uart mcf_uart_platform_data[] = {
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{
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.mapbase = MCFUART_BASE0,
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.irq = MCF_IRQ_UART0,
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},
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{
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.mapbase = MCFUART_BASE1,
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.irq = MCF_IRQ_UART1,
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},
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#ifdef MCFUART_BASE2
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{
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.mapbase = MCFUART_BASE2,
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.irq = MCF_IRQ_UART2,
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},
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#endif
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#ifdef MCFUART_BASE3
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{
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.mapbase = MCFUART_BASE3,
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.irq = MCF_IRQ_UART3,
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},
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#endif
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{ },
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};
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static struct platform_device mcf_uart = {
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.name = "mcfuart",
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.id = 0,
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.dev.platform_data = mcf_uart_platform_data,
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};
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#ifdef CONFIG_FEC
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/*
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* Some ColdFire cores contain the Fast Ethernet Controller (FEC)
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* block. It is Freescale's own hardware block. Some ColdFires
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* have 2 of these.
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*/
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static struct resource mcf_fec0_resources[] = {
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{
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.start = MCFFEC_BASE0,
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.end = MCFFEC_BASE0 + MCFFEC_SIZE0 - 1,
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.flags = IORESOURCE_MEM,
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},
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{
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.start = MCF_IRQ_FECRX0,
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.end = MCF_IRQ_FECRX0,
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.flags = IORESOURCE_IRQ,
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},
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{
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.start = MCF_IRQ_FECTX0,
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.end = MCF_IRQ_FECTX0,
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.flags = IORESOURCE_IRQ,
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},
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{
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.start = MCF_IRQ_FECENTC0,
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.end = MCF_IRQ_FECENTC0,
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.flags = IORESOURCE_IRQ,
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},
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};
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static struct platform_device mcf_fec0 = {
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.name = "fec",
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.id = 0,
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.num_resources = ARRAY_SIZE(mcf_fec0_resources),
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.resource = mcf_fec0_resources,
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};
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#ifdef MCFFEC_BASE1
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static struct resource mcf_fec1_resources[] = {
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{
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.start = MCFFEC_BASE1,
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.end = MCFFEC_BASE1 + MCFFEC_SIZE1 - 1,
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.flags = IORESOURCE_MEM,
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},
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{
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.start = MCF_IRQ_FECRX1,
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.end = MCF_IRQ_FECRX1,
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.flags = IORESOURCE_IRQ,
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},
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{
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.start = MCF_IRQ_FECTX1,
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.end = MCF_IRQ_FECTX1,
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.flags = IORESOURCE_IRQ,
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},
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{
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.start = MCF_IRQ_FECENTC1,
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.end = MCF_IRQ_FECENTC1,
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.flags = IORESOURCE_IRQ,
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},
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};
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static struct platform_device mcf_fec1 = {
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.name = "fec",
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.id = 1,
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.num_resources = ARRAY_SIZE(mcf_fec1_resources),
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.resource = mcf_fec1_resources,
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};
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#endif /* MCFFEC_BASE1 */
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#endif /* CONFIG_FEC */
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#if IS_ENABLED(CONFIG_SPI_COLDFIRE_QSPI)
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/*
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* The ColdFire QSPI module is an SPI protocol hardware block used
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* on a number of different ColdFire CPUs.
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*/
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static struct resource mcf_qspi_resources[] = {
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{
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.start = MCFQSPI_BASE,
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.end = MCFQSPI_BASE + MCFQSPI_SIZE - 1,
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.flags = IORESOURCE_MEM,
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},
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{
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.start = MCF_IRQ_QSPI,
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.end = MCF_IRQ_QSPI,
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.flags = IORESOURCE_IRQ,
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},
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};
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static int mcf_cs_setup(struct mcfqspi_cs_control *cs_control)
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{
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int status;
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status = gpio_request(MCFQSPI_CS0, "MCFQSPI_CS0");
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if (status) {
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pr_debug("gpio_request for MCFQSPI_CS0 failed\n");
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goto fail0;
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}
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status = gpio_direction_output(MCFQSPI_CS0, 1);
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if (status) {
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pr_debug("gpio_direction_output for MCFQSPI_CS0 failed\n");
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goto fail1;
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}
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status = gpio_request(MCFQSPI_CS1, "MCFQSPI_CS1");
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if (status) {
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pr_debug("gpio_request for MCFQSPI_CS1 failed\n");
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goto fail1;
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}
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status = gpio_direction_output(MCFQSPI_CS1, 1);
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if (status) {
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pr_debug("gpio_direction_output for MCFQSPI_CS1 failed\n");
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goto fail2;
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}
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status = gpio_request(MCFQSPI_CS2, "MCFQSPI_CS2");
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if (status) {
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pr_debug("gpio_request for MCFQSPI_CS2 failed\n");
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goto fail2;
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}
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status = gpio_direction_output(MCFQSPI_CS2, 1);
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if (status) {
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pr_debug("gpio_direction_output for MCFQSPI_CS2 failed\n");
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goto fail3;
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}
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#ifdef MCFQSPI_CS3
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status = gpio_request(MCFQSPI_CS3, "MCFQSPI_CS3");
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if (status) {
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pr_debug("gpio_request for MCFQSPI_CS3 failed\n");
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goto fail3;
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}
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status = gpio_direction_output(MCFQSPI_CS3, 1);
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if (status) {
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pr_debug("gpio_direction_output for MCFQSPI_CS3 failed\n");
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gpio_free(MCFQSPI_CS3);
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goto fail3;
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}
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#endif
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return 0;
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fail3:
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gpio_free(MCFQSPI_CS2);
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fail2:
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gpio_free(MCFQSPI_CS1);
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fail1:
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gpio_free(MCFQSPI_CS0);
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fail0:
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return status;
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}
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static void mcf_cs_teardown(struct mcfqspi_cs_control *cs_control)
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{
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#ifdef MCFQSPI_CS3
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gpio_free(MCFQSPI_CS3);
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#endif
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gpio_free(MCFQSPI_CS2);
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gpio_free(MCFQSPI_CS1);
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gpio_free(MCFQSPI_CS0);
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}
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static void mcf_cs_select(struct mcfqspi_cs_control *cs_control,
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u8 chip_select, bool cs_high)
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{
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switch (chip_select) {
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case 0:
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gpio_set_value(MCFQSPI_CS0, cs_high);
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break;
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case 1:
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gpio_set_value(MCFQSPI_CS1, cs_high);
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break;
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case 2:
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gpio_set_value(MCFQSPI_CS2, cs_high);
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break;
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#ifdef MCFQSPI_CS3
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case 3:
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gpio_set_value(MCFQSPI_CS3, cs_high);
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break;
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#endif
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}
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}
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static void mcf_cs_deselect(struct mcfqspi_cs_control *cs_control,
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u8 chip_select, bool cs_high)
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{
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switch (chip_select) {
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case 0:
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gpio_set_value(MCFQSPI_CS0, !cs_high);
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break;
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case 1:
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gpio_set_value(MCFQSPI_CS1, !cs_high);
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break;
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case 2:
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gpio_set_value(MCFQSPI_CS2, !cs_high);
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break;
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#ifdef MCFQSPI_CS3
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case 3:
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gpio_set_value(MCFQSPI_CS3, !cs_high);
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break;
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#endif
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}
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}
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static struct mcfqspi_cs_control mcf_cs_control = {
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.setup = mcf_cs_setup,
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.teardown = mcf_cs_teardown,
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.select = mcf_cs_select,
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.deselect = mcf_cs_deselect,
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};
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static struct mcfqspi_platform_data mcf_qspi_data = {
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.bus_num = 0,
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.num_chipselect = 4,
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.cs_control = &mcf_cs_control,
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};
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static struct platform_device mcf_qspi = {
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.name = "mcfqspi",
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.id = 0,
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.num_resources = ARRAY_SIZE(mcf_qspi_resources),
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.resource = mcf_qspi_resources,
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.dev.platform_data = &mcf_qspi_data,
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};
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#endif /* IS_ENABLED(CONFIG_SPI_COLDFIRE_QSPI) */
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static struct platform_device *mcf_devices[] __initdata = {
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&mcf_uart,
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#ifdef CONFIG_FEC
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&mcf_fec0,
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#ifdef MCFFEC_BASE1
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&mcf_fec1,
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#endif
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#endif
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#if IS_ENABLED(CONFIG_SPI_COLDFIRE_QSPI)
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&mcf_qspi,
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#endif
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};
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/*
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* Some ColdFire UARTs let you set the IRQ line to use.
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*/
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static void __init mcf_uart_set_irq(void)
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{
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#ifdef MCFUART_UIVR
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/* UART0 interrupt setup */
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writeb(MCFSIM_ICR_LEVEL6 | MCFSIM_ICR_PRI1, MCF_MBAR + MCFSIM_UART1ICR);
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writeb(MCF_IRQ_UART0, MCFUART_BASE0 + MCFUART_UIVR);
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mcf_mapirq2imr(MCF_IRQ_UART0, MCFINTC_UART0);
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/* UART1 interrupt setup */
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writeb(MCFSIM_ICR_LEVEL6 | MCFSIM_ICR_PRI2, MCF_MBAR + MCFSIM_UART2ICR);
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writeb(MCF_IRQ_UART1, MCFUART_BASE1 + MCFUART_UIVR);
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mcf_mapirq2imr(MCF_IRQ_UART1, MCFINTC_UART1);
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#endif
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}
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static int __init mcf_init_devices(void)
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{
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mcf_uart_set_irq();
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platform_add_devices(mcf_devices, ARRAY_SIZE(mcf_devices));
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return 0;
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}
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arch_initcall(mcf_init_devices);
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