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https://github.com/torvalds/linux
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5f66d482af
The Device Tree support on Nomadik can do everything the old board files could do, so delete the old board files and make the nomadik select CONFIG_OF. Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
290 lines
8.7 KiB
C
290 lines
8.7 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 <linux/amba/mmci.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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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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/* 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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static 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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static 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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/* 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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/*
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* TODO:
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* cannot be set from device tree, convert to a proper DT
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* binding.
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*/
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static struct mmci_platform_data mmcsd_plat_data = {
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.ocr_mask = MMC_VDD_29_30,
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};
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/*
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* This GPIO pin turns on a line that is used to detect card insertion
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* on this board.
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*/
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static int __init cpu8815_mmcsd_init(void)
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{
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struct device_node *cdbias;
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int gpio, err;
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cdbias = of_find_node_by_path("/usb-s8815/mmcsd-gpio");
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if (!cdbias) {
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pr_info("could not find MMC/SD card detect bias node\n");
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return 0;
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}
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gpio = of_get_gpio(cdbias, 0);
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if (gpio < 0) {
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pr_info("could not obtain MMC/SD card detect bias GPIO\n");
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return 0;
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}
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err = gpio_request(gpio, "card detect bias");
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if (err) {
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pr_info("failed to request card detect bias GPIO %d\n", gpio);
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return -ENODEV;
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}
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err = gpio_direction_output(gpio, 0);
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if (err){
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pr_info("failed to set GPIO %d as output, low\n", gpio);
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return err;
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}
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pr_info("enabled USB-S8815 CD bias GPIO %d, low\n", gpio);
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return 0;
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}
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device_initcall(cpu8815_mmcsd_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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OF_DEV_AUXDATA("arm,primecell", NOMADIK_SDI_BASE,
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"mmci", &mmcsd_plat_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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