LXR linux/arch/arm/mach-nomadik/cpu-8815.c

   1/*
   2 * Copyright STMicroelectronics, 2007.
   3 *
   4 *  This program is free software; you can redistribute it and/or modify
   5 *  it under the terms of the GNU General Public License as published by
   6 *  the Free Software Foundation; either version 2 of the License, or
   7 *  (at your option) any later version.
   8 *
   9 *  This program is distributed in the hope that it will be useful,
  10 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  11 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12 *  GNU General Public License for more details.
  13 *
  14 *  You should have received a copy of the GNU General Public License
  15 *  along with this program; if not, write to the Free Software
  16 *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  17 */
  18
  19#include <linux/types.h>
  20#include <linux/init.h>
  21#include <linux/device.h>
  22#include <linux/amba/bus.h>
  23#include <linux/platform_device.h>
  24#include <linux/io.h>
  25#include <linux/slab.h>
  26#include <linux/irq.h>
  27#include <linux/dma-mapping.h>
  28#include <linux/irqchip.h>
  29#include <linux/platform_data/clk-nomadik.h>
  30#include <linux/platform_data/pinctrl-nomadik.h>
  31#include <linux/pinctrl/machine.h>
  32#include <linux/platform_data/clocksource-nomadik-mtu.h>
  33#include <linux/of_irq.h>
  34#include <linux/of_gpio.h>
  35#include <linux/of_address.h>
  36#include <linux/of_platform.h>
  37#include <linux/mtd/fsmc.h>
  38#include <linux/gpio.h>
  39#include <linux/amba/mmci.h>
  40
  41#include <asm/mach/arch.h>
  42#include <asm/mach/map.h>
  43#include <asm/mach/time.h>
  44#include <asm/mach-types.h>
  45
  46#include <asm/cacheflush.h>
  47#include <asm/hardware/cache-l2x0.h>
  48
  49/*
  50 * These are the only hard-coded address offsets we still have to use.
  51 */
  52#define NOMADIK_FSMC_BASE       0x10100000      /* FSMC registers */
  53#define NOMADIK_SDRAMC_BASE     0x10110000      /* SDRAM Controller */
  54#define NOMADIK_CLCDC_BASE      0x10120000      /* CLCD Controller */
  55#define NOMADIK_MDIF_BASE       0x10120000      /* MDIF */
  56#define NOMADIK_DMA0_BASE       0x10130000      /* DMA0 Controller */
  57#define NOMADIK_IC_BASE         0x10140000      /* Vectored Irq Controller */
  58#define NOMADIK_DMA1_BASE       0x10150000      /* DMA1 Controller */
  59#define NOMADIK_USB_BASE        0x10170000      /* USB-OTG conf reg base */
  60#define NOMADIK_CRYP_BASE       0x10180000      /* Crypto processor */
  61#define NOMADIK_SHA1_BASE       0x10190000      /* SHA-1 Processor */
  62#define NOMADIK_XTI_BASE        0x101A0000      /* XTI */
  63#define NOMADIK_RNG_BASE        0x101B0000      /* Random number generator */
  64#define NOMADIK_SRC_BASE        0x101E0000      /* SRC base */
  65#define NOMADIK_WDOG_BASE       0x101E1000      /* Watchdog */
  66#define NOMADIK_MTU0_BASE       0x101E2000      /* Multiple Timer 0 */
  67#define NOMADIK_MTU1_BASE       0x101E3000      /* Multiple Timer 1 */
  68#define NOMADIK_GPIO0_BASE      0x101E4000      /* GPIO0 */
  69#define NOMADIK_GPIO1_BASE      0x101E5000      /* GPIO1 */
  70#define NOMADIK_GPIO2_BASE      0x101E6000      /* GPIO2 */
  71#define NOMADIK_GPIO3_BASE      0x101E7000      /* GPIO3 */
  72#define NOMADIK_RTC_BASE        0x101E8000      /* Real Time Clock base */
  73#define NOMADIK_PMU_BASE        0x101E9000      /* Power Management Unit */
  74#define NOMADIK_OWM_BASE        0x101EA000      /* One wire master */
  75#define NOMADIK_SCR_BASE        0x101EF000      /* Secure Control registers */
  76#define NOMADIK_MSP2_BASE       0x101F0000      /* MSP 2 interface */
  77#define NOMADIK_MSP1_BASE       0x101F1000      /* MSP 1 interface */
  78#define NOMADIK_UART2_BASE      0x101F2000      /* UART 2 interface */
  79#define NOMADIK_SSIRx_BASE      0x101F3000      /* SSI 8-ch rx interface */
  80#define NOMADIK_SSITx_BASE      0x101F4000      /* SSI 8-ch tx interface */
  81#define NOMADIK_MSHC_BASE       0x101F5000      /* Memory Stick(Pro) Host */
  82#define NOMADIK_SDI_BASE        0x101F6000      /* SD-card/MM-Card */
  83#define NOMADIK_I2C1_BASE       0x101F7000      /* I2C1 interface */
  84#define NOMADIK_I2C0_BASE       0x101F8000      /* I2C0 interface */
  85#define NOMADIK_MSP0_BASE       0x101F9000      /* MSP 0 interface */
  86#define NOMADIK_FIRDA_BASE      0x101FA000      /* FIrDA interface */
  87#define NOMADIK_UART1_BASE      0x101FB000      /* UART 1 interface */
  88#define NOMADIK_SSP_BASE        0x101FC000      /* SSP interface */
  89#define NOMADIK_UART0_BASE      0x101FD000      /* UART 0 interface */
  90#define NOMADIK_SGA_BASE        0x101FE000      /* SGA interface */
  91#define NOMADIK_L2CC_BASE       0x10210000      /* L2 Cache controller */
  92#define NOMADIK_UART1_VBASE     0xF01FB000
  93
  94static unsigned long out_low[] = { PIN_OUTPUT_LOW };
  95static unsigned long out_high[] = { PIN_OUTPUT_HIGH };
  96static unsigned long in_nopull[] = { PIN_INPUT_NOPULL };
  97static unsigned long in_pullup[] = { PIN_INPUT_PULLUP };
  98
  99static struct pinctrl_map __initdata nhk8815_pinmap[] = {
 100        PIN_MAP_MUX_GROUP_DEFAULT("uart0", "pinctrl-stn8815", "u0_a_1", "u0"),
 101        PIN_MAP_MUX_GROUP_DEFAULT("uart1", "pinctrl-stn8815", "u1_a_1", "u1"),
 102        /* Hog in MMC/SD card mux */
 103        PIN_MAP_MUX_GROUP_HOG_DEFAULT("pinctrl-stn8815", "mmcsd_a_1", "mmcsd"),
 104        /* MCCLK */
 105        PIN_MAP_CONFIGS_PIN_HOG_DEFAULT("pinctrl-stn8815", "GPIO8_B10", out_low),
 106        /* MCCMD */
 107        PIN_MAP_CONFIGS_PIN_HOG_DEFAULT("pinctrl-stn8815", "GPIO9_A10", in_pullup),
 108        /* MCCMDDIR */
 109        PIN_MAP_CONFIGS_PIN_HOG_DEFAULT("pinctrl-stn8815", "GPIO10_C11", out_high),
 110        /* MCDAT3-0 */
 111        PIN_MAP_CONFIGS_PIN_HOG_DEFAULT("pinctrl-stn8815", "GPIO11_B11", in_pullup),
 112        PIN_MAP_CONFIGS_PIN_HOG_DEFAULT("pinctrl-stn8815", "GPIO12_A11", in_pullup),
 113        PIN_MAP_CONFIGS_PIN_HOG_DEFAULT("pinctrl-stn8815", "GPIO13_C12", in_pullup),
 114        PIN_MAP_CONFIGS_PIN_HOG_DEFAULT("pinctrl-stn8815", "GPIO14_B12", in_pullup),
 115        /* MCDAT0DIR */
 116        PIN_MAP_CONFIGS_PIN_HOG_DEFAULT("pinctrl-stn8815", "GPIO15_A12", out_high),
 117        /* MCDAT31DIR */
 118        PIN_MAP_CONFIGS_PIN_HOG_DEFAULT("pinctrl-stn8815", "GPIO16_C13", out_high),
 119        /* MCMSFBCLK */
 120        PIN_MAP_CONFIGS_PIN_HOG_DEFAULT("pinctrl-stn8815", "GPIO24_C15", in_pullup),
 121        /* CD input GPIO */
 122        PIN_MAP_CONFIGS_PIN_HOG_DEFAULT("pinctrl-stn8815", "GPIO111_H21", in_nopull),
 123        /* CD bias drive */
 124        PIN_MAP_CONFIGS_PIN_HOG_DEFAULT("pinctrl-stn8815", "GPIO112_J21", out_low),
 125        /* I2C0 */
 126        PIN_MAP_CONFIGS_PIN_HOG_DEFAULT("pinctrl-stn8815", "GPIO62_D3", in_pullup),
 127        PIN_MAP_CONFIGS_PIN_HOG_DEFAULT("pinctrl-stn8815", "GPIO63_D2", in_pullup),
 128        /* I2C1 */
 129        PIN_MAP_CONFIGS_PIN_HOG_DEFAULT("pinctrl-stn8815", "GPIO53_L4", in_pullup),
 130        PIN_MAP_CONFIGS_PIN_HOG_DEFAULT("pinctrl-stn8815", "GPIO54_L3", in_pullup),
 131        /* I2C2 */
 132        PIN_MAP_CONFIGS_PIN_HOG_DEFAULT("pinctrl-stn8815", "GPIO73_C21", in_pullup),
 133        PIN_MAP_CONFIGS_PIN_HOG_DEFAULT("pinctrl-stn8815", "GPIO74_C20", in_pullup),
 134};
 135
 136/* This is needed for LL-debug/earlyprintk/debug-macro.S */
 137static struct map_desc cpu8815_io_desc[] __initdata = {
 138        {
 139                .virtual =      NOMADIK_UART1_VBASE,
 140                .pfn =          __phys_to_pfn(NOMADIK_UART1_BASE),
 141                .length =       SZ_4K,
 142                .type =         MT_DEVICE,
 143        },
 144};
 145
 146static void __init cpu8815_map_io(void)
 147{
 148        iotable_init(cpu8815_io_desc, ARRAY_SIZE(cpu8815_io_desc));
 149}
 150
 151static void cpu8815_restart(char mode, const char *cmd)
 152{
 153        void __iomem *srcbase = ioremap(NOMADIK_SRC_BASE, SZ_4K);
 154
 155        /* FIXME: use egpio when implemented */
 156
 157        /* Write anything to Reset status register */
 158        writel(1, srcbase + 0x18);
 159}
 160
 161/* Initial value for SRC control register: all timers use MXTAL/8 source */
 162#define SRC_CR_INIT_MASK        0x00007fff
 163#define SRC_CR_INIT_VAL         0x2aaa8000
 164
 165static void __init cpu8815_timer_init_of(void)
 166{
 167        struct device_node *mtu;
 168        void __iomem *base;
 169        int irq;
 170        u32 src_cr;
 171
 172        /* We need this to be up now */
 173        nomadik_clk_init();
 174
 175        mtu = of_find_node_by_path("/mtu0");
 176        if (!mtu)
 177                return;
 178        base = of_iomap(mtu, 0);
 179        if (WARN_ON(!base))
 180                return;
 181        irq = irq_of_parse_and_map(mtu, 0);
 182
 183        pr_info("Remapped MTU @ %p, irq: %d\n", base, irq);
 184
 185        /* Configure timer sources in "system reset controller" ctrl reg */
 186        src_cr = readl(base);
 187        src_cr &= SRC_CR_INIT_MASK;
 188        src_cr |= SRC_CR_INIT_VAL;
 189        writel(src_cr, base);
 190
 191        nmdk_timer_init(base, irq);
 192}
 193
 194static struct fsmc_nand_timings cpu8815_nand_timings = {
 195        .thiz   = 0,
 196        .thold  = 0x10,
 197        .twait  = 0x0A,
 198        .tset   = 0,
 199};
 200
 201static struct fsmc_nand_platform_data cpu8815_nand_data = {
 202        .nand_timings = &cpu8815_nand_timings,
 203};
 204
 205/*
 206 * The SMSC911x IRQ is connected to a GPIO pin, but the driver expects
 207 * to simply request an IRQ passed as a resource. So the GPIO pin needs
 208 * to be requested by this hog and set as input.
 209 */
 210static int __init cpu8815_eth_init(void)
 211{
 212        struct device_node *eth;
 213        int gpio, irq, err;
 214
 215        eth = of_find_node_by_path("/usb-s8815/ethernet-gpio");
 216        if (!eth) {
 217                pr_info("could not find any ethernet GPIO\n");
 218                return 0;
 219        }
 220        gpio = of_get_gpio(eth, 0);
 221        err = gpio_request(gpio, "eth_irq");
 222        if (err) {
 223                pr_info("failed to request ethernet GPIO\n");
 224                return -ENODEV;
 225        }
 226        err = gpio_direction_input(gpio);
 227        if (err) {
 228                pr_info("failed to set ethernet GPIO as input\n");
 229                return -ENODEV;
 230        }
 231        irq = gpio_to_irq(gpio);
 232        pr_info("enabled USB-S8815 ethernet GPIO %d, IRQ %d\n", gpio, irq);
 233        return 0;
 234}
 235device_initcall(cpu8815_eth_init);
 236
 237/*
 238 * TODO:
 239 * cannot be set from device tree, convert to a proper DT
 240 * binding.
 241 */
 242static struct mmci_platform_data mmcsd_plat_data = {
 243        .ocr_mask = MMC_VDD_29_30,
 244};
 245
 246/*
 247 * This GPIO pin turns on a line that is used to detect card insertion
 248 * on this board.
 249 */
 250static int __init cpu8815_mmcsd_init(void)
 251{
 252        struct device_node *cdbias;
 253        int gpio, err;
 254
 255        cdbias = of_find_node_by_path("/usb-s8815/mmcsd-gpio");
 256        if (!cdbias) {
 257                pr_info("could not find MMC/SD card detect bias node\n");
 258                return 0;
 259        }
 260        gpio = of_get_gpio(cdbias, 0);
 261        if (gpio < 0) {
 262                pr_info("could not obtain MMC/SD card detect bias GPIO\n");
 263                return 0;
 264        }
 265        err = gpio_request(gpio, "card detect bias");
 266        if (err) {
 267                pr_info("failed to request card detect bias GPIO %d\n", gpio);
 268                return -ENODEV;
 269        }
 270        err = gpio_direction_output(gpio, 0);
 271        if (err){
 272                pr_info("failed to set GPIO %d as output, low\n", gpio);
 273                return err;
 274        }
 275        pr_info("enabled USB-S8815 CD bias GPIO %d, low\n", gpio);
 276        return 0;
 277}
 278device_initcall(cpu8815_mmcsd_init);
 279
 280
 281/* These are mostly to get the right device names for the clock lookups */
 282static struct of_dev_auxdata cpu8815_auxdata_lookup[] __initdata = {
 283        OF_DEV_AUXDATA("st,nomadik-gpio", NOMADIK_GPIO0_BASE,
 284                "gpio.0", NULL),
 285        OF_DEV_AUXDATA("st,nomadik-gpio", NOMADIK_GPIO1_BASE,
 286                "gpio.1", NULL),
 287        OF_DEV_AUXDATA("st,nomadik-gpio", NOMADIK_GPIO2_BASE,
 288                "gpio.2", NULL),
 289        OF_DEV_AUXDATA("st,nomadik-gpio", NOMADIK_GPIO3_BASE,
 290                "gpio.3", NULL),
 291        OF_DEV_AUXDATA("stericsson,nmk-pinctrl-stn8815", 0,
 292                "pinctrl-stn8815", NULL),
 293        OF_DEV_AUXDATA("arm,primecell", NOMADIK_UART0_BASE,
 294                "uart0", NULL),
 295        OF_DEV_AUXDATA("arm,primecell", NOMADIK_UART1_BASE,
 296                "uart1", NULL),
 297        OF_DEV_AUXDATA("arm,primecell", NOMADIK_RNG_BASE,
 298                "rng", NULL),
 299        OF_DEV_AUXDATA("arm,primecell", NOMADIK_RTC_BASE,
 300                "rtc-pl031", NULL),
 301        OF_DEV_AUXDATA("stericsson,fsmc-nand", NOMADIK_FSMC_BASE,
 302                "fsmc-nand", &cpu8815_nand_data),
 303        OF_DEV_AUXDATA("arm,primecell", NOMADIK_SDI_BASE,
 304                "mmci", &mmcsd_plat_data),
 305        { /* sentinel */ },
 306};
 307
 308static void __init cpu8815_init_of(void)
 309{
 310#ifdef CONFIG_CACHE_L2X0
 311        /* At full speed latency must be >=2, so 0x249 in low bits */
 312        l2x0_of_init(0x00730249, 0xfe000fff);
 313#endif
 314        pinctrl_register_mappings(nhk8815_pinmap, ARRAY_SIZE(nhk8815_pinmap));
 315        of_platform_populate(NULL, of_default_bus_match_table,
 316                        cpu8815_auxdata_lookup, NULL);
 317}
 318
 319static const char * cpu8815_board_compat[] = {
 320        "calaosystems,usb-s8815",
 321        NULL,
 322};
 323
 324DT_MACHINE_START(NOMADIK_DT, "Nomadik STn8815")
 325        .map_io         = cpu8815_map_io,
 326        .init_irq       = irqchip_init,
 327        .init_time      = cpu8815_timer_init_of,
 328        .init_machine   = cpu8815_init_of,
 329        .restart        = cpu8815_restart,
 330        .dt_compat      = cpu8815_board_compat,
 331MACHINE_END
 332