arch/arm/mach-cns3xxx/core.c

   1 /*
   2  * Copyright 1999 - 2003 ARM Limited
   3  * Copyright 2000 Deep Blue Solutions Ltd
   4  * Copyright 2008 Cavium Networks
   5  *
   6  * This file is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License, Version 2, as
   8  * published by the Free Software Foundation.
   9  */
  10
  11 #include <linux/init.h>
  12 #include <linux/interrupt.h>
  13 #include <linux/clockchips.h>
  14 #include <linux/io.h>
  15 #include <linux/irqchip/arm-gic.h>
  16 #include <linux/of_platform.h>
  17 #include <linux/platform_device.h>
  18 #include <linux/usb/ehci_pdriver.h>
  19 #include <linux/usb/ohci_pdriver.h>
  20 #include <asm/mach/arch.h>
  21 #include <asm/mach/map.h>
  22 #include <asm/mach/time.h>
  23 #include <asm/mach/irq.h>
  24 #include <asm/hardware/cache-l2x0.h>
  25 #include "cns3xxx.h"
  26 #include "core.h"
  27 #include "pm.h"
  28
  29 static struct map_desc cns3xxx_io_desc[] __initdata = {
  30         {
  31                 .virtual        = CNS3XXX_TC11MP_SCU_BASE_VIRT,
  32                 .pfn            = __phys_to_pfn(CNS3XXX_TC11MP_SCU_BASE),
  33                 .length         = SZ_8K,
  34                 .type           = MT_DEVICE,
  35         }, {
  36                 .virtual        = CNS3XXX_TIMER1_2_3_BASE_VIRT,
  37                 .pfn            = __phys_to_pfn(CNS3XXX_TIMER1_2_3_BASE),
  38                 .length         = SZ_4K,
  39                 .type           = MT_DEVICE,
  40         }, {
  41                 .virtual        = CNS3XXX_MISC_BASE_VIRT,
  42                 .pfn            = __phys_to_pfn(CNS3XXX_MISC_BASE),
  43                 .length         = SZ_4K,
  44                 .type           = MT_DEVICE,
  45         }, {
  46                 .virtual        = CNS3XXX_PM_BASE_VIRT,
  47                 .pfn            = __phys_to_pfn(CNS3XXX_PM_BASE),
  48                 .length         = SZ_4K,
  49                 .type           = MT_DEVICE,
  50 #ifdef CONFIG_PCI
  51         }, {
  52                 .virtual        = CNS3XXX_PCIE0_HOST_BASE_VIRT,
  53                 .pfn            = __phys_to_pfn(CNS3XXX_PCIE0_HOST_BASE),
  54                 .length         = SZ_4K,
  55                 .type           = MT_DEVICE,
  56         }, {
  57                 .virtual        = CNS3XXX_PCIE0_CFG0_BASE_VIRT,
  58                 .pfn            = __phys_to_pfn(CNS3XXX_PCIE0_CFG0_BASE),
  59                 .length         = SZ_64K, /* really 4 KiB at offset 32 KiB */
  60                 .type           = MT_DEVICE,
  61         }, {
  62                 .virtual        = CNS3XXX_PCIE0_CFG1_BASE_VIRT,
  63                 .pfn            = __phys_to_pfn(CNS3XXX_PCIE0_CFG1_BASE),
  64                 .length         = SZ_16M,
  65                 .type           = MT_DEVICE,
  66         }, {
  67                 .virtual        = CNS3XXX_PCIE1_HOST_BASE_VIRT,
  68                 .pfn            = __phys_to_pfn(CNS3XXX_PCIE1_HOST_BASE),
  69                 .length         = SZ_4K,
  70                 .type           = MT_DEVICE,
  71         }, {
  72                 .virtual        = CNS3XXX_PCIE1_CFG0_BASE_VIRT,
  73                 .pfn            = __phys_to_pfn(CNS3XXX_PCIE1_CFG0_BASE),
  74                 .length         = SZ_64K, /* really 4 KiB at offset 32 KiB */
  75                 .type           = MT_DEVICE,
  76         }, {
  77                 .virtual        = CNS3XXX_PCIE1_CFG1_BASE_VIRT,
  78                 .pfn            = __phys_to_pfn(CNS3XXX_PCIE1_CFG1_BASE),
  79                 .length         = SZ_16M,
  80                 .type           = MT_DEVICE,
  81 #endif
  82         },
  83 };
  84
  85 void __init cns3xxx_map_io(void)
  86 {
  87         iotable_init(cns3xxx_io_desc, ARRAY_SIZE(cns3xxx_io_desc));
  88 }
  89
  90 /* used by entry-macro.S */
  91 void __init cns3xxx_init_irq(void)
  92 {
  93         gic_init(0, 29, IOMEM(CNS3XXX_TC11MP_GIC_DIST_BASE_VIRT),
  94                  IOMEM(CNS3XXX_TC11MP_GIC_CPU_BASE_VIRT));
  95 }
  96
  97 void cns3xxx_power_off(void)
  98 {
  99         u32 __iomem *pm_base = IOMEM(CNS3XXX_PM_BASE_VIRT);
 100         u32 clkctrl;
 101
 102         printk(KERN_INFO "powering system down...\n");
 103
 104         clkctrl = readl(pm_base + PM_SYS_CLK_CTRL_OFFSET);
 105         clkctrl &= 0xfffff1ff;
 106         clkctrl |= (0x5 << 9);          /* Hibernate */
 107         writel(clkctrl, pm_base + PM_SYS_CLK_CTRL_OFFSET);
 108
 109 }
 110
 111 /*
 112  * Timer
 113  */
 114 static void __iomem *cns3xxx_tmr1;
 115
 116 static void cns3xxx_timer_set_mode(enum clock_event_mode mode,
 117                                    struct clock_event_device *clk)
 118 {
 119         unsigned long ctrl = readl(cns3xxx_tmr1 + TIMER1_2_CONTROL_OFFSET);
 120         int pclk = cns3xxx_cpu_clock() / 8;
 121         int reload;
 122
 123         switch (mode) {
 124         case CLOCK_EVT_MODE_PERIODIC:
 125                 reload = pclk * 20 / (3 * HZ) * 0x25000;
 126                 writel(reload, cns3xxx_tmr1 + TIMER1_AUTO_RELOAD_OFFSET);
 127                 ctrl |= (1 << 0) | (1 << 2) | (1 << 9);
 128                 break;
 129         case CLOCK_EVT_MODE_ONESHOT:
 130                 /* period set, and timer enabled in 'next_event' hook */
 131                 ctrl |= (1 << 2) | (1 << 9);
 132                 break;
 133         case CLOCK_EVT_MODE_UNUSED:
 134         case CLOCK_EVT_MODE_SHUTDOWN:
 135         default:
 136                 ctrl = 0;
 137         }
 138
 139         writel(ctrl, cns3xxx_tmr1 + TIMER1_2_CONTROL_OFFSET);
 140 }
 141
 142 static int cns3xxx_timer_set_next_event(unsigned long evt,
 143                                         struct clock_event_device *unused)
 144 {
 145         unsigned long ctrl = readl(cns3xxx_tmr1 + TIMER1_2_CONTROL_OFFSET);
 146
 147         writel(evt, cns3xxx_tmr1 + TIMER1_AUTO_RELOAD_OFFSET);
 148         writel(ctrl | (1 << 0), cns3xxx_tmr1 + TIMER1_2_CONTROL_OFFSET);
 149
 150         return 0;
 151 }
 152
 153 static struct clock_event_device cns3xxx_tmr1_clockevent = {
 154         .name           = "cns3xxx timer1",
 155         .features       = CLOCK_EVT_FEAT_PERIODIC | CLOCK_EVT_FEAT_ONESHOT,
 156         .set_mode       = cns3xxx_timer_set_mode,
 157         .set_next_event = cns3xxx_timer_set_next_event,
 158         .rating         = 350,
 159         .cpumask        = cpu_all_mask,
 160 };
 161
 162 static void __init cns3xxx_clockevents_init(unsigned int timer_irq)
 163 {
 164         cns3xxx_tmr1_clockevent.irq = timer_irq;
 165         clockevents_config_and_register(&cns3xxx_tmr1_clockevent,
 166                                         (cns3xxx_cpu_clock() >> 3) * 1000000,
 167                                         0xf, 0xffffffff);
 168 }
 169
 170 /*
 171  * IRQ handler for the timer
 172  */
 173 static irqreturn_t cns3xxx_timer_interrupt(int irq, void *dev_id)
 174 {
 175         struct clock_event_device *evt = &cns3xxx_tmr1_clockevent;
 176         u32 __iomem *stat = cns3xxx_tmr1 + TIMER1_2_INTERRUPT_STATUS_OFFSET;
 177         u32 val;
 178
 179         /* Clear the interrupt */
 180         val = readl(stat);
 181         writel(val & ~(1 << 2), stat);
 182
 183         evt->event_handler(evt);
 184
 185         return IRQ_HANDLED;
 186 }
 187
 188 static struct irqaction cns3xxx_timer_irq = {
 189         .name           = "timer",
 190         .flags          = IRQF_TIMER | IRQF_IRQPOLL,
 191         .handler        = cns3xxx_timer_interrupt,
 192 };
 193
 194 /*
 195  * Set up the clock source and clock events devices
 196  */
 197 static void __init __cns3xxx_timer_init(unsigned int timer_irq)
 198 {
 199         u32 val;
 200         u32 irq_mask;
 201
 202         /*
 203          * Initialise to a known state (all timers off)
 204          */
 205
 206         /* disable timer1 and timer2 */
 207         writel(0, cns3xxx_tmr1 + TIMER1_2_CONTROL_OFFSET);
 208         /* stop free running timer3 */
 209         writel(0, cns3xxx_tmr1 + TIMER_FREERUN_CONTROL_OFFSET);
 210
 211         /* timer1 */
 212         writel(0x5C800, cns3xxx_tmr1 + TIMER1_COUNTER_OFFSET);
 213         writel(0x5C800, cns3xxx_tmr1 + TIMER1_AUTO_RELOAD_OFFSET);
 214
 215         writel(0, cns3xxx_tmr1 + TIMER1_MATCH_V1_OFFSET);
 216         writel(0, cns3xxx_tmr1 + TIMER1_MATCH_V2_OFFSET);
 217
 218         /* mask irq, non-mask timer1 overflow */
 219         irq_mask = readl(cns3xxx_tmr1 + TIMER1_2_INTERRUPT_MASK_OFFSET);
 220         irq_mask &= ~(1 << 2);
 221         irq_mask |= 0x03;
 222         writel(irq_mask, cns3xxx_tmr1 + TIMER1_2_INTERRUPT_MASK_OFFSET);
 223
 224         /* down counter */
 225         val = readl(cns3xxx_tmr1 + TIMER1_2_CONTROL_OFFSET);
 226         val |= (1 << 9);
 227         writel(val, cns3xxx_tmr1 + TIMER1_2_CONTROL_OFFSET);
 228
 229         /* timer2 */
 230         writel(0, cns3xxx_tmr1 + TIMER2_MATCH_V1_OFFSET);
 231         writel(0, cns3xxx_tmr1 + TIMER2_MATCH_V2_OFFSET);
 232
 233         /* mask irq */
 234         irq_mask = readl(cns3xxx_tmr1 + TIMER1_2_INTERRUPT_MASK_OFFSET);
 235         irq_mask |= ((1 << 3) | (1 << 4) | (1 << 5));
 236         writel(irq_mask, cns3xxx_tmr1 + TIMER1_2_INTERRUPT_MASK_OFFSET);
 237
 238         /* down counter */
 239         val = readl(cns3xxx_tmr1 + TIMER1_2_CONTROL_OFFSET);
 240         val |= (1 << 10);
 241         writel(val, cns3xxx_tmr1 + TIMER1_2_CONTROL_OFFSET);
 242
 243         /* Make irqs happen for the system timer */
 244         setup_irq(timer_irq, &cns3xxx_timer_irq);
 245
 246         cns3xxx_clockevents_init(timer_irq);
 247 }
 248
 249 void __init cns3xxx_timer_init(void)
 250 {
 251         cns3xxx_tmr1 = IOMEM(CNS3XXX_TIMER1_2_3_BASE_VIRT);
 252
 253         __cns3xxx_timer_init(IRQ_CNS3XXX_TIMER0);
 254 }
 255
 256 #ifdef CONFIG_CACHE_L2X0
 257
 258 void __init cns3xxx_l2x0_init(void)
 259 {
 260         void __iomem *base = ioremap(CNS3XXX_L2C_BASE, SZ_4K);
 261         u32 val;
 262
 263         if (WARN_ON(!base))
 264                 return;
 265
 266         /*
 267          * Tag RAM Control register
 268          *
 269          * bit[10:8]    - 1 cycle of write accesses latency
 270          * bit[6:4]     - 1 cycle of read accesses latency
 271          * bit[3:0]     - 1 cycle of setup latency
 272          *
 273          * 1 cycle of latency for setup, read and write accesses
 274          */
 275         val = readl(base + L310_TAG_LATENCY_CTRL);
 276         val &= 0xfffff888;
 277         writel(val, base + L310_TAG_LATENCY_CTRL);
 278
 279         /*
 280          * Data RAM Control register
 281          *
 282          * bit[10:8]    - 1 cycles of write accesses latency
 283          * bit[6:4]     - 1 cycles of read accesses latency
 284          * bit[3:0]     - 1 cycle of setup latency
 285          *
 286          * 1 cycle of latency for setup, read and write accesses
 287          */
 288         val = readl(base + L310_DATA_LATENCY_CTRL);
 289         val &= 0xfffff888;
 290         writel(val, base + L310_DATA_LATENCY_CTRL);
 291
 292         /* 32 KiB, 8-way, parity disable */
 293         l2x0_init(base, 0x00500000, 0xfe0f0fff);
 294 }
 295
 296 #endif /* CONFIG_CACHE_L2X0 */
 297
 298 static int csn3xxx_usb_power_on(struct platform_device *pdev)
 299 {
 300         /*
 301          * EHCI and OHCI share the same clock and power,
 302          * resetting twice would cause the 1st controller been reset.
 303          * Therefore only do power up  at the first up device, and
 304          * power down at the last down device.
 305          *
 306          * Set USB AHB INCR length to 16
 307          */
 308         if (atomic_inc_return(&usb_pwr_ref) == 1) {
 309                 cns3xxx_pwr_power_up(1 << PM_PLL_HM_PD_CTRL_REG_OFFSET_PLL_USB);
 310                 cns3xxx_pwr_clk_en(1 << PM_CLK_GATE_REG_OFFSET_USB_HOST);
 311                 cns3xxx_pwr_soft_rst(1 << PM_SOFT_RST_REG_OFFST_USB_HOST);
 312                 __raw_writel((__raw_readl(MISC_CHIP_CONFIG_REG) | (0X2 << 24)),
 313                         MISC_CHIP_CONFIG_REG);
 314         }
 315
 316         return 0;
 317 }
 318
 319 static void csn3xxx_usb_power_off(struct platform_device *pdev)
 320 {
 321         /*
 322          * EHCI and OHCI share the same clock and power,
 323          * resetting twice would cause the 1st controller been reset.
 324          * Therefore only do power up  at the first up device, and
 325          * power down at the last down device.
 326          */
 327         if (atomic_dec_return(&usb_pwr_ref) == 0)
 328                 cns3xxx_pwr_clk_dis(1 << PM_CLK_GATE_REG_OFFSET_USB_HOST);
 329 }
 330
 331 static struct usb_ehci_pdata cns3xxx_usb_ehci_pdata = {
 332         .power_on       = csn3xxx_usb_power_on,
 333         .power_off      = csn3xxx_usb_power_off,
 334 };
 335
 336 static struct usb_ohci_pdata cns3xxx_usb_ohci_pdata = {
 337         .num_ports      = 1,
 338         .power_on       = csn3xxx_usb_power_on,
 339         .power_off      = csn3xxx_usb_power_off,
 340 };
 341
 342 static struct of_dev_auxdata cns3xxx_auxdata[] __initconst = {
 343         { "intel,usb-ehci", CNS3XXX_USB_BASE, "ehci-platform", &cns3xxx_usb_ehci_pdata },
 344         { "intel,usb-ohci", CNS3XXX_USB_OHCI_BASE, "ohci-platform", &cns3xxx_usb_ohci_pdata },
 345         { "cavium,cns3420-ahci", CNS3XXX_SATA2_BASE, "ahci", NULL },
 346         { "cavium,cns3420-sdhci", CNS3XXX_SDIO_BASE, "ahci", NULL },
 347         {},
 348 };
 349
 350 static void __init cns3xxx_init(void)
 351 {
 352         struct device_node *dn;
 353
 354         cns3xxx_l2x0_init();
 355
 356         dn = of_find_compatible_node(NULL, NULL, "cavium,cns3420-ahci");
 357         if (of_device_is_available(dn)) {
 358                 u32 tmp;
 359
 360                 tmp = __raw_readl(MISC_SATA_POWER_MODE);
 361                 tmp |= 0x1 << 16; /* Disable SATA PHY 0 from SLUMBER Mode */
 362                 tmp |= 0x1 << 17; /* Disable SATA PHY 1 from SLUMBER Mode */
 363                 __raw_writel(tmp, MISC_SATA_POWER_MODE);
 364
 365                 /* Enable SATA PHY */
 366                 cns3xxx_pwr_power_up(0x1 << PM_PLL_HM_PD_CTRL_REG_OFFSET_SATA_PHY0);
 367                 cns3xxx_pwr_power_up(0x1 << PM_PLL_HM_PD_CTRL_REG_OFFSET_SATA_PHY1);
 368
 369                 /* Enable SATA Clock */
 370                 cns3xxx_pwr_clk_en(0x1 << PM_CLK_GATE_REG_OFFSET_SATA);
 371
 372                 /* De-Asscer SATA Reset */
 373                 cns3xxx_pwr_soft_rst(CNS3XXX_PWR_SOFTWARE_RST(SATA));
 374         }
 375
 376         dn = of_find_compatible_node(NULL, NULL, "cavium,cns3420-sdhci");
 377         if (of_device_is_available(dn)) {
 378                 u32 __iomem *gpioa = IOMEM(CNS3XXX_MISC_BASE_VIRT + 0x0014);
 379                 u32 gpioa_pins = __raw_readl(gpioa);
 380
 381                 /* MMC/SD pins share with GPIOA */
 382                 gpioa_pins |= 0x1fff0004;
 383                 __raw_writel(gpioa_pins, gpioa);
 384
 385                 cns3xxx_pwr_clk_en(CNS3XXX_PWR_CLK_EN(SDIO));
 386                 cns3xxx_pwr_soft_rst(CNS3XXX_PWR_SOFTWARE_RST(SDIO));
 387         }
 388
 389         pm_power_off = cns3xxx_power_off;
 390
 391         of_platform_populate(NULL, of_default_bus_match_table,
 392                         cns3xxx_auxdata, NULL);
 393 }
 394
 395 static const char *cns3xxx_dt_compat[] __initdata = {
 396         "cavium,cns3410",
 397         "cavium,cns3420",
 398         NULL,
 399 };
 400
 401 DT_MACHINE_START(CNS3XXX_DT, "Cavium Networks CNS3xxx")
 402         .dt_compat      = cns3xxx_dt_compat,
 403         .map_io         = cns3xxx_map_io,
 404         .init_irq       = cns3xxx_init_irq,
 405         .init_time      = cns3xxx_timer_init,
 406         .init_machine   = cns3xxx_init,
 407         .restart        = cns3xxx_restart,
 408 MACHINE_END