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49932f5ef1
This moves the pin configuration for the Nomadik over to the device tree using Gabriel's bindings. Remove the auxdata nailing down the name of the pin controller as this is no longer necessary. Cc: Gabriel Fernandez <gabriel.fernandez@st.com> Cc: Patrice Chotard <patrice.chotard@st.com> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
269 lines
8.1 KiB
C
269 lines
8.1 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/clocksource.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 <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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/*
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* These are the only hard-coded address offsets we still have to use.
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*/
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#define NOMADIK_FSMC_BASE 0x10100000 /* FSMC registers */
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#define NOMADIK_SDRAMC_BASE 0x10110000 /* SDRAM Controller */
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#define NOMADIK_CLCDC_BASE 0x10120000 /* CLCD Controller */
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#define NOMADIK_MDIF_BASE 0x10120000 /* MDIF */
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#define NOMADIK_DMA0_BASE 0x10130000 /* DMA0 Controller */
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#define NOMADIK_IC_BASE 0x10140000 /* Vectored Irq Controller */
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#define NOMADIK_DMA1_BASE 0x10150000 /* DMA1 Controller */
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#define NOMADIK_USB_BASE 0x10170000 /* USB-OTG conf reg base */
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#define NOMADIK_CRYP_BASE 0x10180000 /* Crypto processor */
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#define NOMADIK_SHA1_BASE 0x10190000 /* SHA-1 Processor */
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#define NOMADIK_XTI_BASE 0x101A0000 /* XTI */
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#define NOMADIK_RNG_BASE 0x101B0000 /* Random number generator */
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#define NOMADIK_SRC_BASE 0x101E0000 /* SRC base */
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#define NOMADIK_WDOG_BASE 0x101E1000 /* Watchdog */
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#define NOMADIK_MTU0_BASE 0x101E2000 /* Multiple Timer 0 */
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#define NOMADIK_MTU1_BASE 0x101E3000 /* Multiple Timer 1 */
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#define NOMADIK_GPIO0_BASE 0x101E4000 /* GPIO0 */
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#define NOMADIK_GPIO1_BASE 0x101E5000 /* GPIO1 */
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#define NOMADIK_GPIO2_BASE 0x101E6000 /* GPIO2 */
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#define NOMADIK_GPIO3_BASE 0x101E7000 /* GPIO3 */
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#define NOMADIK_RTC_BASE 0x101E8000 /* Real Time Clock base */
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#define NOMADIK_PMU_BASE 0x101E9000 /* Power Management Unit */
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#define NOMADIK_OWM_BASE 0x101EA000 /* One wire master */
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#define NOMADIK_SCR_BASE 0x101EF000 /* Secure Control registers */
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#define NOMADIK_MSP2_BASE 0x101F0000 /* MSP 2 interface */
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#define NOMADIK_MSP1_BASE 0x101F1000 /* MSP 1 interface */
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#define NOMADIK_UART2_BASE 0x101F2000 /* UART 2 interface */
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#define NOMADIK_SSIRx_BASE 0x101F3000 /* SSI 8-ch rx interface */
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#define NOMADIK_SSITx_BASE 0x101F4000 /* SSI 8-ch tx interface */
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#define NOMADIK_MSHC_BASE 0x101F5000 /* Memory Stick(Pro) Host */
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#define NOMADIK_SDI_BASE 0x101F6000 /* SD-card/MM-Card */
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#define NOMADIK_I2C1_BASE 0x101F7000 /* I2C1 interface */
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#define NOMADIK_I2C0_BASE 0x101F8000 /* I2C0 interface */
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#define NOMADIK_MSP0_BASE 0x101F9000 /* MSP 0 interface */
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#define NOMADIK_FIRDA_BASE 0x101FA000 /* FIrDA interface */
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#define NOMADIK_UART1_BASE 0x101FB000 /* UART 1 interface */
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#define NOMADIK_SSP_BASE 0x101FC000 /* SSP interface */
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#define NOMADIK_UART0_BASE 0x101FD000 /* UART 0 interface */
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#define NOMADIK_SGA_BASE 0x101FE000 /* SGA interface */
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#define NOMADIK_L2CC_BASE 0x10210000 /* L2 Cache controller */
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#define NOMADIK_UART1_VBASE 0xF01FB000
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/* This is needed for LL-debug/earlyprintk/debug-macro.S */
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static struct map_desc cpu8815_io_desc[] __initdata = {
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{
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.virtual = NOMADIK_UART1_VBASE,
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.pfn = __phys_to_pfn(NOMADIK_UART1_BASE),
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.length = SZ_4K,
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.type = MT_DEVICE,
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},
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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(cpu8815_io_desc, ARRAY_SIZE(cpu8815_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 *srcbase = ioremap(NOMADIK_SRC_BASE, SZ_4K);
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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, srcbase + 0x18);
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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("/mtu@101e2000");
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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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clocksource_of_init();
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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("stericsson,fsmc-nand", NOMADIK_FSMC_BASE,
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NULL, &cpu8815_nand_data),
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OF_DEV_AUXDATA("arm,primecell", NOMADIK_SDI_BASE,
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NULL, &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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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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