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/platform_data/clk-nomadik.h>
  29 #include <linux/clocksource.h>
  30 #include <linux/of_irq.h>
  31 #include <linux/of_gpio.h>
  32 #include <linux/of_address.h>
  33 #include <linux/of_platform.h>
  34 #include <linux/mtd/fsmc.h>
  35 #include <linux/gpio.h>
  36 #include <linux/amba/mmci.h>
  37
  38 #include <asm/mach/arch.h>
  39 #include <asm/mach/map.h>
  40 #include <asm/mach/time.h>
  41 #include <asm/mach-types.h>
  42
  43 #include <asm/cacheflush.h>
  44 #include <asm/hardware/cache-l2x0.h>
  45
  46 /*
  47  * These are the only hard-coded address offsets we still have to use.
  48  */
  49 #define NOMADIK_FSMC_BASE       0x10100000      /* FSMC registers */
  50 #define NOMADIK_SDRAMC_BASE     0x10110000      /* SDRAM Controller */
  51 #define NOMADIK_CLCDC_BASE      0x10120000      /* CLCD Controller */
  52 #define NOMADIK_MDIF_BASE       0x10120000      /* MDIF */
  53 #define NOMADIK_DMA0_BASE       0x10130000      /* DMA0 Controller */
  54 #define NOMADIK_IC_BASE         0x10140000      /* Vectored Irq Controller */
  55 #define NOMADIK_DMA1_BASE       0x10150000      /* DMA1 Controller */
  56 #define NOMADIK_USB_BASE        0x10170000      /* USB-OTG conf reg base */
  57 #define NOMADIK_CRYP_BASE       0x10180000      /* Crypto processor */
  58 #define NOMADIK_SHA1_BASE       0x10190000      /* SHA-1 Processor */
  59 #define NOMADIK_XTI_BASE        0x101A0000      /* XTI */
  60 #define NOMADIK_RNG_BASE        0x101B0000      /* Random number generator */
  61 #define NOMADIK_SRC_BASE        0x101E0000      /* SRC base */
  62 #define NOMADIK_WDOG_BASE       0x101E1000      /* Watchdog */
  63 #define NOMADIK_MTU0_BASE       0x101E2000      /* Multiple Timer 0 */
  64 #define NOMADIK_MTU1_BASE       0x101E3000      /* Multiple Timer 1 */
  65 #define NOMADIK_GPIO0_BASE      0x101E4000      /* GPIO0 */
  66 #define NOMADIK_GPIO1_BASE      0x101E5000      /* GPIO1 */
  67 #define NOMADIK_GPIO2_BASE      0x101E6000      /* GPIO2 */
  68 #define NOMADIK_GPIO3_BASE      0x101E7000      /* GPIO3 */
  69 #define NOMADIK_RTC_BASE        0x101E8000      /* Real Time Clock base */
  70 #define NOMADIK_PMU_BASE        0x101E9000      /* Power Management Unit */
  71 #define NOMADIK_OWM_BASE        0x101EA000      /* One wire master */
  72 #define NOMADIK_SCR_BASE        0x101EF000      /* Secure Control registers */
  73 #define NOMADIK_MSP2_BASE       0x101F0000      /* MSP 2 interface */
  74 #define NOMADIK_MSP1_BASE       0x101F1000      /* MSP 1 interface */
  75 #define NOMADIK_UART2_BASE      0x101F2000      /* UART 2 interface */
  76 #define NOMADIK_SSIRx_BASE      0x101F3000      /* SSI 8-ch rx interface */
  77 #define NOMADIK_SSITx_BASE      0x101F4000      /* SSI 8-ch tx interface */
  78 #define NOMADIK_MSHC_BASE       0x101F5000      /* Memory Stick(Pro) Host */
  79 #define NOMADIK_SDI_BASE        0x101F6000      /* SD-card/MM-Card */
  80 #define NOMADIK_I2C1_BASE       0x101F7000      /* I2C1 interface */
  81 #define NOMADIK_I2C0_BASE       0x101F8000      /* I2C0 interface */
  82 #define NOMADIK_MSP0_BASE       0x101F9000      /* MSP 0 interface */
  83 #define NOMADIK_FIRDA_BASE      0x101FA000      /* FIrDA interface */
  84 #define NOMADIK_UART1_BASE      0x101FB000      /* UART 1 interface */
  85 #define NOMADIK_SSP_BASE        0x101FC000      /* SSP interface */
  86 #define NOMADIK_UART0_BASE      0x101FD000      /* UART 0 interface */
  87 #define NOMADIK_SGA_BASE        0x101FE000      /* SGA interface */
  88 #define NOMADIK_L2CC_BASE       0x10210000      /* L2 Cache controller */
  89 #define NOMADIK_UART1_VBASE     0xF01FB000
  90
  91 /* This is needed for LL-debug/earlyprintk/debug-macro.S */
  92 static struct map_desc cpu8815_io_desc[] __initdata = {
  93         {
  94                 .virtual =      NOMADIK_UART1_VBASE,
  95                 .pfn =          __phys_to_pfn(NOMADIK_UART1_BASE),
  96                 .length =       SZ_4K,
  97                 .type =         MT_DEVICE,
  98         },
  99 };
 100
 101 static void __init cpu8815_map_io(void)
 102 {
 103         iotable_init(cpu8815_io_desc, ARRAY_SIZE(cpu8815_io_desc));
 104 }
 105
 106 static void cpu8815_restart(char mode, const char *cmd)
 107 {
 108         void __iomem *srcbase = ioremap(NOMADIK_SRC_BASE, SZ_4K);
 109
 110         /* FIXME: use egpio when implemented */
 111
 112         /* Write anything to Reset status register */
 113         writel(1, srcbase + 0x18);
 114 }
 115
 116 /* Initial value for SRC control register: all timers use MXTAL/8 source */
 117 #define SRC_CR_INIT_MASK        0x00007fff
 118 #define SRC_CR_INIT_VAL         0x2aaa8000
 119
 120 static void __init cpu8815_timer_init_of(void)
 121 {
 122         struct device_node *mtu;
 123         void __iomem *base;
 124         int irq;
 125         u32 src_cr;
 126
 127         /* We need this to be up now */
 128         nomadik_clk_init();
 129
 130         mtu = of_find_node_by_path("/mtu@101e2000");
 131         if (!mtu)
 132                 return;
 133         base = of_iomap(mtu, 0);
 134         if (WARN_ON(!base))
 135                 return;
 136         irq = irq_of_parse_and_map(mtu, 0);
 137
 138         pr_info("Remapped MTU @ %p, irq: %d\n", base, irq);
 139
 140         /* Configure timer sources in "system reset controller" ctrl reg */
 141         src_cr = readl(base);
 142         src_cr &= SRC_CR_INIT_MASK;
 143         src_cr |= SRC_CR_INIT_VAL;
 144         writel(src_cr, base);
 145
 146         clocksource_of_init();
 147 }
 148
 149 static struct fsmc_nand_timings cpu8815_nand_timings = {
 150         .thiz   = 0,
 151         .thold  = 0x10,
 152         .twait  = 0x0A,
 153         .tset   = 0,
 154 };
 155
 156 static struct fsmc_nand_platform_data cpu8815_nand_data = {
 157         .nand_timings = &cpu8815_nand_timings,
 158 };
 159
 160 /*
 161  * The SMSC911x IRQ is connected to a GPIO pin, but the driver expects
 162  * to simply request an IRQ passed as a resource. So the GPIO pin needs
 163  * to be requested by this hog and set as input.
 164  */
 165 static int __init cpu8815_eth_init(void)
 166 {
 167         struct device_node *eth;
 168         int gpio, irq, err;
 169
 170         eth = of_find_node_by_path("/usb-s8815/ethernet-gpio");
 171         if (!eth) {
 172                 pr_info("could not find any ethernet GPIO\n");
 173                 return 0;
 174         }
 175         gpio = of_get_gpio(eth, 0);
 176         err = gpio_request(gpio, "eth_irq");
 177         if (err) {
 178                 pr_info("failed to request ethernet GPIO\n");
 179                 return -ENODEV;
 180         }
 181         err = gpio_direction_input(gpio);
 182         if (err) {
 183                 pr_info("failed to set ethernet GPIO as input\n");
 184                 return -ENODEV;
 185         }
 186         irq = gpio_to_irq(gpio);
 187         pr_info("enabled USB-S8815 ethernet GPIO %d, IRQ %d\n", gpio, irq);
 188         return 0;
 189 }
 190 device_initcall(cpu8815_eth_init);
 191
 192 /*
 193  * TODO:
 194  * cannot be set from device tree, convert to a proper DT
 195  * binding.
 196  */
 197 static struct mmci_platform_data mmcsd_plat_data = {
 198         .ocr_mask = MMC_VDD_29_30,
 199 };
 200
 201 /*
 202  * This GPIO pin turns on a line that is used to detect card insertion
 203  * on this board.
 204  */
 205 static int __init cpu8815_mmcsd_init(void)
 206 {
 207         struct device_node *cdbias;
 208         int gpio, err;
 209
 210         cdbias = of_find_node_by_path("/usb-s8815/mmcsd-gpio");
 211         if (!cdbias) {
 212                 pr_info("could not find MMC/SD card detect bias node\n");
 213                 return 0;
 214         }
 215         gpio = of_get_gpio(cdbias, 0);
 216         if (gpio < 0) {
 217                 pr_info("could not obtain MMC/SD card detect bias GPIO\n");
 218                 return 0;
 219         }
 220         err = gpio_request(gpio, "card detect bias");
 221         if (err) {
 222                 pr_info("failed to request card detect bias GPIO %d\n", gpio);
 223                 return -ENODEV;
 224         }
 225         err = gpio_direction_output(gpio, 0);
 226         if (err){
 227                 pr_info("failed to set GPIO %d as output, low\n", gpio);
 228                 return err;
 229         }
 230         pr_info("enabled USB-S8815 CD bias GPIO %d, low\n", gpio);
 231         return 0;
 232 }
 233 device_initcall(cpu8815_mmcsd_init);
 234
 235
 236 /* These are mostly to get the right device names for the clock lookups */
 237 static struct of_dev_auxdata cpu8815_auxdata_lookup[] __initdata = {
 238         OF_DEV_AUXDATA("stericsson,fsmc-nand", NOMADIK_FSMC_BASE,
 239                 NULL, &cpu8815_nand_data),
 240         OF_DEV_AUXDATA("arm,primecell", NOMADIK_SDI_BASE,
 241                 NULL, &mmcsd_plat_data),
 242         { /* sentinel */ },
 243 };
 244
 245 static void __init cpu8815_init_of(void)
 246 {
 247 #ifdef CONFIG_CACHE_L2X0
 248         /* At full speed latency must be >=2, so 0x249 in low bits */
 249         l2x0_of_init(0x00730249, 0xfe000fff);
 250 #endif
 251         of_platform_populate(NULL, of_default_bus_match_table,
 252                         cpu8815_auxdata_lookup, NULL);
 253 }
 254
 255 static const char * cpu8815_board_compat[] = {
 256         "calaosystems,usb-s8815",
 257         NULL,
 258 };
 259
 260 DT_MACHINE_START(NOMADIK_DT, "Nomadik STn8815")
 261         .map_io         = cpu8815_map_io,
 262         .init_time      = cpu8815_timer_init_of,
 263         .init_machine   = cpu8815_init_of,
 264         .restart        = cpu8815_restart,
 265         .dt_compat      = cpu8815_board_compat,
 266 MACHINE_END