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2ad6e39867
This converts the SMSC91x ethernet controller to use device tree. The existing solution from the board file, to request the GPIO triggering the ethernet IRQ from the board file is kept for the time being, but the GPIO number assignment is moved over to the device tree. Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
352 lines
10 KiB
C
352 lines
10 KiB
C
/*
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* Copyright STMicroelectronics, 2007.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#include <linux/types.h>
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#include <linux/init.h>
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#include <linux/device.h>
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#include <linux/amba/bus.h>
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#include <linux/platform_device.h>
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#include <linux/io.h>
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#include <linux/slab.h>
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#include <linux/irq.h>
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#include <linux/dma-mapping.h>
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#include <linux/irqchip.h>
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#include <linux/platform_data/clk-nomadik.h>
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#include <linux/platform_data/pinctrl-nomadik.h>
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#include <linux/pinctrl/machine.h>
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#include <linux/platform_data/clocksource-nomadik-mtu.h>
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#include <linux/of_irq.h>
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#include <linux/of_gpio.h>
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#include <linux/of_address.h>
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#include <linux/of_platform.h>
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#include <linux/mtd/fsmc.h>
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#include <linux/gpio.h>
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#include <mach/hardware.h>
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#include <mach/irqs.h>
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#include <asm/mach/arch.h>
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#include <asm/mach/map.h>
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#include <asm/mach/time.h>
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#include <asm/mach-types.h>
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#include <asm/cacheflush.h>
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#include <asm/hardware/cache-l2x0.h>
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#include "cpu-8815.h"
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/* The 8815 has 4 GPIO blocks, let's register them immediately */
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static resource_size_t __initdata cpu8815_gpio_base[] = {
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NOMADIK_GPIO0_BASE,
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NOMADIK_GPIO1_BASE,
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NOMADIK_GPIO2_BASE,
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NOMADIK_GPIO3_BASE,
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};
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static struct platform_device *
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cpu8815_add_gpio(int id, resource_size_t addr, int irq,
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struct nmk_gpio_platform_data *pdata)
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{
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struct resource resources[] = {
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{
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.start = addr,
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.end = addr + 127,
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.flags = IORESOURCE_MEM,
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},
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{
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.start = irq,
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.end = irq,
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.flags = IORESOURCE_IRQ,
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}
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};
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return platform_device_register_resndata(NULL, "gpio", id,
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resources, ARRAY_SIZE(resources),
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pdata, sizeof(*pdata));
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}
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void cpu8815_add_gpios(resource_size_t *base, int num, int irq,
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struct nmk_gpio_platform_data *pdata)
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{
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int first = 0;
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int i;
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for (i = 0; i < num; i++, first += 32, irq++) {
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pdata->first_gpio = first;
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pdata->first_irq = NOMADIK_GPIO_TO_IRQ(first);
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pdata->num_gpio = 32;
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cpu8815_add_gpio(i, base[i], irq, pdata);
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}
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}
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static unsigned long out_low[] = { PIN_OUTPUT_LOW };
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static unsigned long out_high[] = { PIN_OUTPUT_HIGH };
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static unsigned long in_nopull[] = { PIN_INPUT_NOPULL };
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static unsigned long in_pullup[] = { PIN_INPUT_PULLUP };
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static struct pinctrl_map __initdata nhk8815_pinmap[] = {
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PIN_MAP_MUX_GROUP_DEFAULT("uart0", "pinctrl-stn8815", "u0_a_1", "u0"),
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PIN_MAP_MUX_GROUP_DEFAULT("uart1", "pinctrl-stn8815", "u1_a_1", "u1"),
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/* Hog in MMC/SD card mux */
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PIN_MAP_MUX_GROUP_HOG_DEFAULT("pinctrl-stn8815", "mmcsd_a_1", "mmcsd"),
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/* MCCLK */
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PIN_MAP_CONFIGS_PIN_HOG_DEFAULT("pinctrl-stn8815", "GPIO8_B10", out_low),
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/* MCCMD */
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PIN_MAP_CONFIGS_PIN_HOG_DEFAULT("pinctrl-stn8815", "GPIO9_A10", in_pullup),
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/* MCCMDDIR */
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PIN_MAP_CONFIGS_PIN_HOG_DEFAULT("pinctrl-stn8815", "GPIO10_C11", out_high),
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/* MCDAT3-0 */
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PIN_MAP_CONFIGS_PIN_HOG_DEFAULT("pinctrl-stn8815", "GPIO11_B11", in_pullup),
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PIN_MAP_CONFIGS_PIN_HOG_DEFAULT("pinctrl-stn8815", "GPIO12_A11", in_pullup),
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PIN_MAP_CONFIGS_PIN_HOG_DEFAULT("pinctrl-stn8815", "GPIO13_C12", in_pullup),
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PIN_MAP_CONFIGS_PIN_HOG_DEFAULT("pinctrl-stn8815", "GPIO14_B12", in_pullup),
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/* MCDAT0DIR */
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PIN_MAP_CONFIGS_PIN_HOG_DEFAULT("pinctrl-stn8815", "GPIO15_A12", out_high),
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/* MCDAT31DIR */
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PIN_MAP_CONFIGS_PIN_HOG_DEFAULT("pinctrl-stn8815", "GPIO16_C13", out_high),
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/* MCMSFBCLK */
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PIN_MAP_CONFIGS_PIN_HOG_DEFAULT("pinctrl-stn8815", "GPIO24_C15", in_pullup),
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/* CD input GPIO */
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PIN_MAP_CONFIGS_PIN_HOG_DEFAULT("pinctrl-stn8815", "GPIO111_H21", in_nopull),
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/* CD bias drive */
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PIN_MAP_CONFIGS_PIN_HOG_DEFAULT("pinctrl-stn8815", "GPIO112_J21", out_low),
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/* I2C0 */
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PIN_MAP_CONFIGS_PIN_HOG_DEFAULT("pinctrl-stn8815", "GPIO62_D3", in_pullup),
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PIN_MAP_CONFIGS_PIN_HOG_DEFAULT("pinctrl-stn8815", "GPIO63_D2", in_pullup),
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/* I2C1 */
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PIN_MAP_CONFIGS_PIN_HOG_DEFAULT("pinctrl-stn8815", "GPIO53_L4", in_pullup),
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PIN_MAP_CONFIGS_PIN_HOG_DEFAULT("pinctrl-stn8815", "GPIO54_L3", in_pullup),
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/* I2C2 */
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PIN_MAP_CONFIGS_PIN_HOG_DEFAULT("pinctrl-stn8815", "GPIO73_C21", in_pullup),
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PIN_MAP_CONFIGS_PIN_HOG_DEFAULT("pinctrl-stn8815", "GPIO74_C20", in_pullup),
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};
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static inline void
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cpu8815_add_pinctrl(struct device *parent, const char *name)
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{
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struct platform_device_info pdevinfo = {
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.parent = parent,
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.name = name,
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.id = -1,
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};
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pinctrl_register_mappings(nhk8815_pinmap, ARRAY_SIZE(nhk8815_pinmap));
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platform_device_register_full(&pdevinfo);
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}
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static int __init cpu8815_init(void)
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{
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struct nmk_gpio_platform_data pdata = {
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/* No custom data yet */
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};
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/* For e.g. device tree boots */
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if (!machine_is_nomadik())
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return 0;
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cpu8815_add_gpios(cpu8815_gpio_base, ARRAY_SIZE(cpu8815_gpio_base),
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IRQ_GPIO0, &pdata);
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cpu8815_add_pinctrl(NULL, "pinctrl-stn8815");
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amba_apb_device_add(NULL, "rng", NOMADIK_RNG_BASE, SZ_4K, 0, 0, NULL, 0);
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amba_apb_device_add(NULL, "rtc-pl031", NOMADIK_RTC_BASE, SZ_4K, IRQ_RTC_RTT, 0, NULL, 0);
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return 0;
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}
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arch_initcall(cpu8815_init);
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/* All SoC devices live in the same area (see hardware.h) */
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static struct map_desc nomadik_io_desc[] __initdata = {
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{
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.virtual = NOMADIK_IO_VIRTUAL,
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.pfn = __phys_to_pfn(NOMADIK_IO_PHYSICAL),
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.length = NOMADIK_IO_SIZE,
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.type = MT_DEVICE,
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}
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/* static ram and secured ram may be added later */
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};
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void __init cpu8815_map_io(void)
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{
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iotable_init(nomadik_io_desc, ARRAY_SIZE(nomadik_io_desc));
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}
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void __init cpu8815_init_irq(void)
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{
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/* This modified VIC cell has two register blocks, at 0 and 0x20 */
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vic_init(io_p2v(NOMADIK_IC_BASE + 0x00), IRQ_VIC_START + 0, ~0, 0);
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vic_init(io_p2v(NOMADIK_IC_BASE + 0x20), IRQ_VIC_START + 32, ~0, 0);
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/*
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* Init clocks here so that they are available for system timer
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* initialization.
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*/
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nomadik_clk_init();
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}
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/*
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* This function is called from the board init ("init_machine").
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*/
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void __init cpu8815_platform_init(void)
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{
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#ifdef CONFIG_CACHE_L2X0
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/* At full speed latency must be >=2, so 0x249 in low bits */
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l2x0_init(io_p2v(NOMADIK_L2CC_BASE), 0x00730249, 0xfe000fff);
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#endif
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return;
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}
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void cpu8815_restart(char mode, const char *cmd)
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{
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void __iomem *src_rstsr = io_p2v(NOMADIK_SRC_BASE + 0x18);
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/* FIXME: use egpio when implemented */
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/* Write anything to Reset status register */
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writel(1, src_rstsr);
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}
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#ifdef CONFIG_OF
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/* Initial value for SRC control register: all timers use MXTAL/8 source */
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#define SRC_CR_INIT_MASK 0x00007fff
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#define SRC_CR_INIT_VAL 0x2aaa8000
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static void __init cpu8815_timer_init_of(void)
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{
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struct device_node *mtu;
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void __iomem *base;
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int irq;
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u32 src_cr;
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/* We need this to be up now */
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nomadik_clk_init();
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mtu = of_find_node_by_path("/mtu0");
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if (!mtu)
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return;
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base = of_iomap(mtu, 0);
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if (WARN_ON(!base))
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return;
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irq = irq_of_parse_and_map(mtu, 0);
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pr_info("Remapped MTU @ %p, irq: %d\n", base, irq);
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/* Configure timer sources in "system reset controller" ctrl reg */
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src_cr = readl(base);
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src_cr &= SRC_CR_INIT_MASK;
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src_cr |= SRC_CR_INIT_VAL;
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writel(src_cr, base);
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nmdk_timer_init(base, irq);
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}
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static struct fsmc_nand_timings cpu8815_nand_timings = {
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.thiz = 0,
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.thold = 0x10,
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.twait = 0x0A,
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.tset = 0,
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};
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static struct fsmc_nand_platform_data cpu8815_nand_data = {
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.nand_timings = &cpu8815_nand_timings,
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};
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/*
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* The SMSC911x IRQ is connected to a GPIO pin, but the driver expects
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* to simply request an IRQ passed as a resource. So the GPIO pin needs
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* to be requested by this hog and set as input.
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*/
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static int __init cpu8815_eth_init(void)
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{
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struct device_node *eth;
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int gpio, irq, err;
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eth = of_find_node_by_path("/usb-s8815/ethernet-gpio");
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if (!eth) {
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pr_info("could not find any ethernet GPIO\n");
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return 0;
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}
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gpio = of_get_gpio(eth, 0);
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err = gpio_request(gpio, "eth_irq");
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if (err) {
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pr_info("failed to request ethernet GPIO\n");
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return -ENODEV;
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}
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err = gpio_direction_input(gpio);
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if (err) {
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pr_info("failed to set ethernet GPIO as input\n");
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return -ENODEV;
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}
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irq = gpio_to_irq(gpio);
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pr_info("enabled USB-S8815 ethernet GPIO %d, IRQ %d\n", gpio, irq);
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return 0;
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}
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device_initcall(cpu8815_eth_init);
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/* These are mostly to get the right device names for the clock lookups */
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static struct of_dev_auxdata cpu8815_auxdata_lookup[] __initdata = {
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OF_DEV_AUXDATA("st,nomadik-gpio", NOMADIK_GPIO0_BASE,
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"gpio.0", NULL),
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OF_DEV_AUXDATA("st,nomadik-gpio", NOMADIK_GPIO1_BASE,
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"gpio.1", NULL),
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OF_DEV_AUXDATA("st,nomadik-gpio", NOMADIK_GPIO2_BASE,
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"gpio.2", NULL),
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OF_DEV_AUXDATA("st,nomadik-gpio", NOMADIK_GPIO3_BASE,
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"gpio.3", NULL),
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OF_DEV_AUXDATA("stericsson,nmk-pinctrl-stn8815", 0,
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"pinctrl-stn8815", NULL),
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OF_DEV_AUXDATA("arm,primecell", NOMADIK_UART0_BASE,
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"uart0", NULL),
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OF_DEV_AUXDATA("arm,primecell", NOMADIK_UART1_BASE,
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"uart1", NULL),
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OF_DEV_AUXDATA("arm,primecell", NOMADIK_RNG_BASE,
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"rng", NULL),
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OF_DEV_AUXDATA("arm,primecell", NOMADIK_RTC_BASE,
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"rtc-pl031", NULL),
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OF_DEV_AUXDATA("stericsson,fsmc-nand", NOMADIK_FSMC_BASE,
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"fsmc-nand", &cpu8815_nand_data),
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{ /* sentinel */ },
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};
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static void __init cpu8815_init_of(void)
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{
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#ifdef CONFIG_CACHE_L2X0
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/* At full speed latency must be >=2, so 0x249 in low bits */
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l2x0_of_init(0x00730249, 0xfe000fff);
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#endif
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pinctrl_register_mappings(nhk8815_pinmap, ARRAY_SIZE(nhk8815_pinmap));
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of_platform_populate(NULL, of_default_bus_match_table,
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cpu8815_auxdata_lookup, NULL);
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}
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static const char * cpu8815_board_compat[] = {
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"calaosystems,usb-s8815",
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NULL,
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};
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DT_MACHINE_START(NOMADIK_DT, "Nomadik STn8815")
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.map_io = cpu8815_map_io,
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.init_irq = irqchip_init,
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.init_time = cpu8815_timer_init_of,
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.init_machine = cpu8815_init_of,
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.restart = cpu8815_restart,
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.dt_compat = cpu8815_board_compat,
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MACHINE_END
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#endif
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