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 int cns3xxx_shutdown(struct clock_event_device *clk)
 117 {
 118         writel(0, cns3xxx_tmr1 + TIMER1_2_CONTROL_OFFSET);
 119         return 0;
 120 }
 121
 122 static int cns3xxx_set_oneshot(struct clock_event_device *clk)
 123 {
 124         unsigned long ctrl = readl(cns3xxx_tmr1 + TIMER1_2_CONTROL_OFFSET);
 125
 126         /* period set, and timer enabled in 'next_event' hook */
 127         ctrl |= (1 << 2) | (1 << 9);
 128         writel(ctrl, cns3xxx_tmr1 + TIMER1_2_CONTROL_OFFSET);
 129         return 0;
 130 }
 131
 132 static int cns3xxx_set_periodic(struct clock_event_device *clk)
 133 {
 134         unsigned long ctrl = readl(cns3xxx_tmr1 + TIMER1_2_CONTROL_OFFSET);
 135         int pclk = cns3xxx_cpu_clock() / 8;
 136         int reload;
 137
 138         reload = pclk * 20 / (3 * HZ) * 0x25000;
 139         writel(reload, cns3xxx_tmr1 + TIMER1_AUTO_RELOAD_OFFSET);
 140         ctrl |= (1 << 0) | (1 << 2) | (1 << 9);
 141         writel(ctrl, cns3xxx_tmr1 + TIMER1_2_CONTROL_OFFSET);
 142         return 0;
 143 }
 144
 145 static int cns3xxx_timer_set_next_event(unsigned long evt,
 146                                         struct clock_event_device *unused)
 147 {
 148         unsigned long ctrl = readl(cns3xxx_tmr1 + TIMER1_2_CONTROL_OFFSET);
 149
 150         writel(evt, cns3xxx_tmr1 + TIMER1_AUTO_RELOAD_OFFSET);
 151         writel(ctrl | (1 << 0), cns3xxx_tmr1 + TIMER1_2_CONTROL_OFFSET);
 152
 153         return 0;
 154 }
 155
 156 static struct clock_event_device cns3xxx_tmr1_clockevent = {
 157         .name                   = "cns3xxx timer1",
 158         .features               = CLOCK_EVT_FEAT_PERIODIC |
 159                                   CLOCK_EVT_FEAT_ONESHOT,
 160         .set_state_shutdown     = cns3xxx_shutdown,
 161         .set_state_periodic     = cns3xxx_set_periodic,
 162         .set_state_oneshot      = cns3xxx_set_oneshot,
 163         .tick_resume            = cns3xxx_shutdown,
 164         .set_next_event         = cns3xxx_timer_set_next_event,
 165         .rating                 = 350,
 166         .cpumask                = cpu_all_mask,
 167 };
 168
 169 static void __init cns3xxx_clockevents_init(unsigned int timer_irq)
 170 {
 171         cns3xxx_tmr1_clockevent.irq = timer_irq;
 172         clockevents_config_and_register(&cns3xxx_tmr1_clockevent,
 173                                         (cns3xxx_cpu_clock() >> 3) * 1000000,
 174                                         0xf, 0xffffffff);
 175 }
 176
 177 /*
 178  * IRQ handler for the timer
 179  */
 180 static irqreturn_t cns3xxx_timer_interrupt(int irq, void *dev_id)
 181 {
 182         struct clock_event_device *evt = &cns3xxx_tmr1_clockevent;
 183         u32 __iomem *stat = cns3xxx_tmr1 + TIMER1_2_INTERRUPT_STATUS_OFFSET;
 184         u32 val;
 185
 186         /* Clear the interrupt */
 187         val = readl(stat);
 188         writel(val & ~(1 << 2), stat);
 189
 190         evt->event_handler(evt);
 191
 192         return IRQ_HANDLED;
 193 }
 194
 195 static struct irqaction cns3xxx_timer_irq = {
 196         .name           = "timer",
 197         .flags          = IRQF_TIMER | IRQF_IRQPOLL,
 198         .handler        = cns3xxx_timer_interrupt,
 199 };
 200
 201 /*
 202  * Set up the clock source and clock events devices
 203  */
 204 static void __init __cns3xxx_timer_init(unsigned int timer_irq)
 205 {
 206         u32 val;
 207         u32 irq_mask;
 208
 209         /*
 210          * Initialise to a known state (all timers off)
 211          */
 212
 213         /* disable timer1 and timer2 */
 214         writel(0, cns3xxx_tmr1 + TIMER1_2_CONTROL_OFFSET);
 215         /* stop free running timer3 */
 216         writel(0, cns3xxx_tmr1 + TIMER_FREERUN_CONTROL_OFFSET);
 217
 218         /* timer1 */
 219         writel(0x5C800, cns3xxx_tmr1 + TIMER1_COUNTER_OFFSET);
 220         writel(0x5C800, cns3xxx_tmr1 + TIMER1_AUTO_RELOAD_OFFSET);
 221
 222         writel(0, cns3xxx_tmr1 + TIMER1_MATCH_V1_OFFSET);
 223         writel(0, cns3xxx_tmr1 + TIMER1_MATCH_V2_OFFSET);
 224
 225         /* mask irq, non-mask timer1 overflow */
 226         irq_mask = readl(cns3xxx_tmr1 + TIMER1_2_INTERRUPT_MASK_OFFSET);
 227         irq_mask &= ~(1 << 2);
 228         irq_mask |= 0x03;
 229         writel(irq_mask, cns3xxx_tmr1 + TIMER1_2_INTERRUPT_MASK_OFFSET);
 230
 231         /* down counter */
 232         val = readl(cns3xxx_tmr1 + TIMER1_2_CONTROL_OFFSET);
 233         val |= (1 << 9);
 234         writel(val, cns3xxx_tmr1 + TIMER1_2_CONTROL_OFFSET);
 235
 236         /* timer2 */
 237         writel(0, cns3xxx_tmr1 + TIMER2_MATCH_V1_OFFSET);
 238         writel(0, cns3xxx_tmr1 + TIMER2_MATCH_V2_OFFSET);
 239
 240         /* mask irq */
 241         irq_mask = readl(cns3xxx_tmr1 + TIMER1_2_INTERRUPT_MASK_OFFSET);
 242         irq_mask |= ((1 << 3) | (1 << 4) | (1 << 5));
 243         writel(irq_mask, cns3xxx_tmr1 + TIMER1_2_INTERRUPT_MASK_OFFSET);
 244
 245         /* down counter */
 246         val = readl(cns3xxx_tmr1 + TIMER1_2_CONTROL_OFFSET);
 247         val |= (1 << 10);
 248         writel(val, cns3xxx_tmr1 + TIMER1_2_CONTROL_OFFSET);
 249
 250         /* Make irqs happen for the system timer */
 251         setup_irq(timer_irq, &cns3xxx_timer_irq);
 252
 253         cns3xxx_clockevents_init(timer_irq);
 254 }
 255
 256 void __init cns3xxx_timer_init(void)
 257 {
 258         cns3xxx_tmr1 = IOMEM(CNS3XXX_TIMER1_2_3_BASE_VIRT);
 259
 260         __cns3xxx_timer_init(IRQ_CNS3XXX_TIMER0);
 261 }
 262
 263 #ifdef CONFIG_CACHE_L2X0
 264
 265 void __init cns3xxx_l2x0_init(void)
 266 {
 267         void __iomem *base = ioremap(CNS3XXX_L2C_BASE, SZ_4K);
 268         u32 val;
 269
 270         if (WARN_ON(!base))
 271                 return;
 272
 273         /*
 274          * Tag RAM Control register
 275          *
 276          * bit[10:8]    - 1 cycle of write accesses latency
 277          * bit[6:4]     - 1 cycle of read accesses latency
 278          * bit[3:0]     - 1 cycle of setup latency
 279          *
 280          * 1 cycle of latency for setup, read and write accesses
 281          */
 282         val = readl(base + L310_TAG_LATENCY_CTRL);
 283         val &= 0xfffff888;
 284         writel(val, base + L310_TAG_LATENCY_CTRL);
 285
 286         /*
 287          * Data RAM Control register
 288          *
 289          * bit[10:8]    - 1 cycles of write accesses latency
 290          * bit[6:4]     - 1 cycles of read accesses latency
 291          * bit[3:0]     - 1 cycle of setup latency
 292          *
 293          * 1 cycle of latency for setup, read and write accesses
 294          */
 295         val = readl(base + L310_DATA_LATENCY_CTRL);
 296         val &= 0xfffff888;
 297         writel(val, base + L310_DATA_LATENCY_CTRL);
 298
 299         /* 32 KiB, 8-way, parity disable */
 300         l2x0_init(base, 0x00500000, 0xfe0f0fff);
 301 }
 302
 303 #endif /* CONFIG_CACHE_L2X0 */
 304
 305 static int csn3xxx_usb_power_on(struct platform_device *pdev)
 306 {
 307         /*
 308          * EHCI and OHCI share the same clock and power,
 309          * resetting twice would cause the 1st controller been reset.
 310          * Therefore only do power up  at the first up device, and
 311          * power down at the last down device.
 312          *
 313          * Set USB AHB INCR length to 16
 314          */
 315         if (atomic_inc_return(&usb_pwr_ref) == 1) {
 316                 cns3xxx_pwr_power_up(1 << PM_PLL_HM_PD_CTRL_REG_OFFSET_PLL_USB);
 317                 cns3xxx_pwr_clk_en(1 << PM_CLK_GATE_REG_OFFSET_USB_HOST);
 318                 cns3xxx_pwr_soft_rst(1 << PM_SOFT_RST_REG_OFFST_USB_HOST);
 319                 __raw_writel((__raw_readl(MISC_CHIP_CONFIG_REG) | (0X2 << 24)),
 320                         MISC_CHIP_CONFIG_REG);
 321         }
 322
 323         return 0;
 324 }
 325
 326 static void csn3xxx_usb_power_off(struct platform_device *pdev)
 327 {
 328         /*
 329          * EHCI and OHCI share the same clock and power,
 330          * resetting twice would cause the 1st controller been reset.
 331          * Therefore only do power up  at the first up device, and
 332          * power down at the last down device.
 333          */
 334         if (atomic_dec_return(&usb_pwr_ref) == 0)
 335                 cns3xxx_pwr_clk_dis(1 << PM_CLK_GATE_REG_OFFSET_USB_HOST);
 336 }
 337
 338 static struct usb_ehci_pdata cns3xxx_usb_ehci_pdata = {
 339         .power_on       = csn3xxx_usb_power_on,
 340         .power_off      = csn3xxx_usb_power_off,
 341 };
 342
 343 static struct usb_ohci_pdata cns3xxx_usb_ohci_pdata = {
 344         .num_ports      = 1,
 345         .power_on       = csn3xxx_usb_power_on,
 346         .power_off      = csn3xxx_usb_power_off,
 347 };
 348
 349 static const struct of_dev_auxdata cns3xxx_auxdata[] __initconst = {
 350         { "intel,usb-ehci", CNS3XXX_USB_BASE, "ehci-platform", &cns3xxx_usb_ehci_pdata },
 351         { "intel,usb-ohci", CNS3XXX_USB_OHCI_BASE, "ohci-platform", &cns3xxx_usb_ohci_pdata },
 352         { "cavium,cns3420-ahci", CNS3XXX_SATA2_BASE, "ahci", NULL },
 353         { "cavium,cns3420-sdhci", CNS3XXX_SDIO_BASE, "ahci", NULL },
 354         {},
 355 };
 356
 357 static void __init cns3xxx_init(void)
 358 {
 359         struct device_node *dn;
 360
 361         cns3xxx_l2x0_init();
 362
 363         dn = of_find_compatible_node(NULL, NULL, "cavium,cns3420-ahci");
 364         if (of_device_is_available(dn)) {
 365                 u32 tmp;
 366
 367                 tmp = __raw_readl(MISC_SATA_POWER_MODE);
 368                 tmp |= 0x1 << 16; /* Disable SATA PHY 0 from SLUMBER Mode */
 369                 tmp |= 0x1 << 17; /* Disable SATA PHY 1 from SLUMBER Mode */
 370                 __raw_writel(tmp, MISC_SATA_POWER_MODE);
 371
 372                 /* Enable SATA PHY */
 373                 cns3xxx_pwr_power_up(0x1 << PM_PLL_HM_PD_CTRL_REG_OFFSET_SATA_PHY0);
 374                 cns3xxx_pwr_power_up(0x1 << PM_PLL_HM_PD_CTRL_REG_OFFSET_SATA_PHY1);
 375
 376                 /* Enable SATA Clock */
 377                 cns3xxx_pwr_clk_en(0x1 << PM_CLK_GATE_REG_OFFSET_SATA);
 378
 379                 /* De-Asscer SATA Reset */
 380                 cns3xxx_pwr_soft_rst(CNS3XXX_PWR_SOFTWARE_RST(SATA));
 381         }
 382
 383         dn = of_find_compatible_node(NULL, NULL, "cavium,cns3420-sdhci");
 384         if (of_device_is_available(dn)) {
 385                 u32 __iomem *gpioa = IOMEM(CNS3XXX_MISC_BASE_VIRT + 0x0014);
 386                 u32 gpioa_pins = __raw_readl(gpioa);
 387
 388                 /* MMC/SD pins share with GPIOA */
 389                 gpioa_pins |= 0x1fff0004;
 390                 __raw_writel(gpioa_pins, gpioa);
 391
 392                 cns3xxx_pwr_clk_en(CNS3XXX_PWR_CLK_EN(SDIO));
 393                 cns3xxx_pwr_soft_rst(CNS3XXX_PWR_SOFTWARE_RST(SDIO));
 394         }
 395
 396         pm_power_off = cns3xxx_power_off;
 397
 398         of_platform_default_populate(NULL, cns3xxx_auxdata, NULL);
 399 }
 400
 401 static const char *const cns3xxx_dt_compat[] __initconst = {
 402         "cavium,cns3410",
 403         "cavium,cns3420",
 404         NULL,
 405 };
 406
 407 DT_MACHINE_START(CNS3XXX_DT, "Cavium Networks CNS3xxx")
 408         .dt_compat      = cns3xxx_dt_compat,
 409         .map_io         = cns3xxx_map_io,
 410         .init_irq       = cns3xxx_init_irq,
 411         .init_time      = cns3xxx_timer_init,
 412         .init_machine   = cns3xxx_init,
 413         .init_late      = cns3xxx_pcie_init_late,
 414         .restart        = cns3xxx_restart,
 415 MACHINE_END