arch/mips/alchemy/common/irq.c

   1 /*
   2  * Copyright 2001, 2007-2008 MontaVista Software Inc.
   3  * Author: MontaVista Software, Inc. <source@mvista.com>
   4  *
   5  * Copyright (C) 2007 Ralf Baechle (ralf@linux-mips.org)
   6  *
   7  *  This program is free software; you can redistribute  it and/or modify it
   8  *  under  the terms of  the GNU General  Public License as published by the
   9  *  Free Software Foundation;  either version 2 of the  License, or (at your
  10  *  option) any later version.
  11  *
  12  *  THIS  SOFTWARE  IS PROVIDED   ``AS  IS'' AND   ANY  EXPRESS OR IMPLIED
  13  *  WARRANTIES,   INCLUDING, BUT NOT  LIMITED  TO, THE IMPLIED WARRANTIES OF
  14  *  MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN
  15  *  NO  EVENT  SHALL   THE AUTHOR  BE    LIABLE FOR ANY   DIRECT, INDIRECT,
  16  *  INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  17  *  NOT LIMITED   TO, PROCUREMENT OF  SUBSTITUTE GOODS  OR SERVICES; LOSS OF
  18  *  USE, DATA,  OR PROFITS; OR  BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
  19  *  ANY THEORY OF LIABILITY, WHETHER IN  CONTRACT, STRICT LIABILITY, OR TORT
  20  *  (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  21  *  THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  22  *
  23  *  You should have received a copy of the  GNU General Public License along
  24  *  with this program; if not, write  to the Free Software Foundation, Inc.,
  25  *  675 Mass Ave, Cambridge, MA 02139, USA.
  26  */
  27
  28 #include <linux/bitops.h>
  29 #include <linux/init.h>
  30 #include <linux/interrupt.h>
  31 #include <linux/irq.h>
  32
  33 #include <asm/irq_cpu.h>
  34 #include <asm/mipsregs.h>
  35 #include <asm/mach-au1x00/au1000.h>
  36 #ifdef CONFIG_MIPS_PB1000
  37 #include <asm/mach-pb1x00/pb1000.h>
  38 #endif
  39
  40 static DEFINE_SPINLOCK(irq_lock);
  41
  42 static int au1x_ic_settype(unsigned int irq, unsigned int flow_type);
  43
  44 /* per-processor fixed function irqs */
  45 struct au1xxx_irqmap au1xxx_ic0_map[] __initdata = {
  46
  47 #if defined(CONFIG_SOC_AU1000)
  48         { AU1000_UART0_INT, IRQ_TYPE_LEVEL_HIGH, 0 },
  49         { AU1000_UART1_INT, IRQ_TYPE_LEVEL_HIGH, 0 },
  50         { AU1000_UART2_INT, IRQ_TYPE_LEVEL_HIGH, 0 },
  51         { AU1000_UART3_INT, IRQ_TYPE_LEVEL_HIGH, 0 },
  52         { AU1000_SSI0_INT, IRQ_TYPE_LEVEL_HIGH, 0 },
  53         { AU1000_SSI1_INT, IRQ_TYPE_LEVEL_HIGH, 0 },
  54         { AU1000_DMA_INT_BASE, IRQ_TYPE_LEVEL_HIGH, 0 },
  55         { AU1000_DMA_INT_BASE+1, IRQ_TYPE_LEVEL_HIGH, 0 },
  56         { AU1000_DMA_INT_BASE+2, IRQ_TYPE_LEVEL_HIGH, 0 },
  57         { AU1000_DMA_INT_BASE+3, IRQ_TYPE_LEVEL_HIGH, 0 },
  58         { AU1000_DMA_INT_BASE+4, IRQ_TYPE_LEVEL_HIGH, 0 },
  59         { AU1000_DMA_INT_BASE+5, IRQ_TYPE_LEVEL_HIGH, 0 },
  60         { AU1000_DMA_INT_BASE+6, IRQ_TYPE_LEVEL_HIGH, 0 },
  61         { AU1000_DMA_INT_BASE+7, IRQ_TYPE_LEVEL_HIGH, 0 },
  62         { AU1000_TOY_INT, IRQ_TYPE_EDGE_RISING, 0 },
  63         { AU1000_TOY_MATCH0_INT, IRQ_TYPE_EDGE_RISING, 0 },
  64         { AU1000_TOY_MATCH1_INT, IRQ_TYPE_EDGE_RISING, 0 },
  65         { AU1000_TOY_MATCH2_INT, IRQ_TYPE_EDGE_RISING, 1 },
  66         { AU1000_RTC_INT, IRQ_TYPE_EDGE_RISING, 0 },
  67         { AU1000_RTC_MATCH0_INT, IRQ_TYPE_EDGE_RISING, 0 },
  68         { AU1000_RTC_MATCH1_INT, IRQ_TYPE_EDGE_RISING, 0 },
  69         { AU1000_RTC_MATCH2_INT, IRQ_TYPE_EDGE_RISING, 0 },
  70         { AU1000_IRDA_TX_INT, IRQ_TYPE_LEVEL_HIGH, 0 },
  71         { AU1000_IRDA_RX_INT, IRQ_TYPE_LEVEL_HIGH, 0 },
  72         { AU1000_USB_DEV_REQ_INT, IRQ_TYPE_LEVEL_HIGH, 0 },
  73         { AU1000_USB_DEV_SUS_INT, IRQ_TYPE_EDGE_RISING, 0 },
  74         { AU1000_USB_HOST_INT, IRQ_TYPE_LEVEL_LOW, 0 },
  75         { AU1000_ACSYNC_INT, IRQ_TYPE_EDGE_RISING, 0 },
  76         { AU1000_MAC0_DMA_INT, IRQ_TYPE_LEVEL_HIGH, 0 },
  77         { AU1000_MAC1_DMA_INT, IRQ_TYPE_LEVEL_HIGH, 0 },
  78         { AU1000_AC97C_INT, IRQ_TYPE_EDGE_RISING, 0 },
  79
  80 #elif defined(CONFIG_SOC_AU1500)
  81
  82         { AU1500_UART0_INT, IRQ_TYPE_LEVEL_HIGH, 0 },
  83         { AU1000_PCI_INTA, IRQ_TYPE_LEVEL_LOW, 0 },
  84         { AU1000_PCI_INTB, IRQ_TYPE_LEVEL_LOW, 0 },
  85         { AU1500_UART3_INT, IRQ_TYPE_LEVEL_HIGH, 0 },
  86         { AU1000_PCI_INTC, IRQ_TYPE_LEVEL_LOW, 0 },
  87         { AU1000_PCI_INTD, IRQ_TYPE_LEVEL_LOW, 0 },
  88         { AU1000_DMA_INT_BASE, IRQ_TYPE_LEVEL_HIGH, 0 },
  89         { AU1000_DMA_INT_BASE+1, IRQ_TYPE_LEVEL_HIGH, 0 },
  90         { AU1000_DMA_INT_BASE+2, IRQ_TYPE_LEVEL_HIGH, 0 },
  91         { AU1000_DMA_INT_BASE+3, IRQ_TYPE_LEVEL_HIGH, 0 },
  92         { AU1000_DMA_INT_BASE+4, IRQ_TYPE_LEVEL_HIGH, 0 },
  93         { AU1000_DMA_INT_BASE+5, IRQ_TYPE_LEVEL_HIGH, 0 },
  94         { AU1000_DMA_INT_BASE+6, IRQ_TYPE_LEVEL_HIGH, 0 },
  95         { AU1000_DMA_INT_BASE+7, IRQ_TYPE_LEVEL_HIGH, 0 },
  96         { AU1000_TOY_INT, IRQ_TYPE_EDGE_RISING, 0 },
  97         { AU1000_TOY_MATCH0_INT, IRQ_TYPE_EDGE_RISING, 0 },
  98         { AU1000_TOY_MATCH1_INT, IRQ_TYPE_EDGE_RISING, 0 },
  99         { AU1000_TOY_MATCH2_INT, IRQ_TYPE_EDGE_RISING, 1 },
 100         { AU1000_RTC_INT, IRQ_TYPE_EDGE_RISING, 0 },
 101         { AU1000_RTC_MATCH0_INT, IRQ_TYPE_EDGE_RISING, 0 },
 102         { AU1000_RTC_MATCH1_INT, IRQ_TYPE_EDGE_RISING, 0 },
 103         { AU1000_RTC_MATCH2_INT, IRQ_TYPE_EDGE_RISING, 0 },
 104         { AU1000_USB_DEV_REQ_INT, IRQ_TYPE_LEVEL_HIGH, 0 },
 105         { AU1000_USB_DEV_SUS_INT, IRQ_TYPE_EDGE_RISING, 0 },
 106         { AU1000_USB_HOST_INT, IRQ_TYPE_LEVEL_LOW, 0 },
 107         { AU1000_ACSYNC_INT, IRQ_TYPE_EDGE_RISING, 0 },
 108         { AU1500_MAC0_DMA_INT, IRQ_TYPE_LEVEL_HIGH, 0 },
 109         { AU1500_MAC1_DMA_INT, IRQ_TYPE_LEVEL_HIGH, 0 },
 110         { AU1000_AC97C_INT, IRQ_TYPE_EDGE_RISING, 0 },
 111
 112 #elif defined(CONFIG_SOC_AU1100)
 113
 114         { AU1100_UART0_INT, IRQ_TYPE_LEVEL_HIGH, 0 },
 115         { AU1100_UART1_INT, IRQ_TYPE_LEVEL_HIGH, 0 },
 116         { AU1100_SD_INT, IRQ_TYPE_LEVEL_HIGH, 0 },
 117         { AU1100_UART3_INT, IRQ_TYPE_LEVEL_HIGH, 0 },
 118         { AU1000_SSI0_INT, IRQ_TYPE_LEVEL_HIGH, 0 },
 119         { AU1000_SSI1_INT, IRQ_TYPE_LEVEL_HIGH, 0 },
 120         { AU1000_DMA_INT_BASE, IRQ_TYPE_LEVEL_HIGH, 0 },
 121         { AU1000_DMA_INT_BASE+1, IRQ_TYPE_LEVEL_HIGH, 0 },
 122         { AU1000_DMA_INT_BASE+2, IRQ_TYPE_LEVEL_HIGH, 0 },
 123         { AU1000_DMA_INT_BASE+3, IRQ_TYPE_LEVEL_HIGH, 0 },
 124         { AU1000_DMA_INT_BASE+4, IRQ_TYPE_LEVEL_HIGH, 0 },
 125         { AU1000_DMA_INT_BASE+5, IRQ_TYPE_LEVEL_HIGH, 0 },
 126         { AU1000_DMA_INT_BASE+6, IRQ_TYPE_LEVEL_HIGH, 0 },
 127         { AU1000_DMA_INT_BASE+7, IRQ_TYPE_LEVEL_HIGH, 0 },
 128         { AU1000_TOY_INT, IRQ_TYPE_EDGE_RISING, 0 },
 129         { AU1000_TOY_MATCH0_INT, IRQ_TYPE_EDGE_RISING, 0 },
 130         { AU1000_TOY_MATCH1_INT, IRQ_TYPE_EDGE_RISING, 0 },
 131         { AU1000_TOY_MATCH2_INT, IRQ_TYPE_EDGE_RISING, 1 },
 132         { AU1000_RTC_INT, IRQ_TYPE_EDGE_RISING, 0 },
 133         { AU1000_RTC_MATCH0_INT, IRQ_TYPE_EDGE_RISING, 0 },
 134         { AU1000_RTC_MATCH1_INT, IRQ_TYPE_EDGE_RISING, 0 },
 135         { AU1000_RTC_MATCH2_INT, IRQ_TYPE_EDGE_RISING, 0 },
 136         { AU1000_IRDA_TX_INT, IRQ_TYPE_LEVEL_HIGH, 0 },
 137         { AU1000_IRDA_RX_INT, IRQ_TYPE_LEVEL_HIGH, 0 },
 138         { AU1000_USB_DEV_REQ_INT, IRQ_TYPE_LEVEL_HIGH, 0 },
 139         { AU1000_USB_DEV_SUS_INT, IRQ_TYPE_EDGE_RISING, 0 },
 140         { AU1000_USB_HOST_INT, IRQ_TYPE_LEVEL_LOW, 0 },
 141         { AU1000_ACSYNC_INT, IRQ_TYPE_EDGE_RISING, 0 },
 142         { AU1100_MAC0_DMA_INT, IRQ_TYPE_LEVEL_HIGH, 0 },
 143         { AU1100_LCD_INT, IRQ_TYPE_LEVEL_HIGH, 0 },
 144         { AU1000_AC97C_INT, IRQ_TYPE_EDGE_RISING, 0 },
 145
 146 #elif defined(CONFIG_SOC_AU1550)
 147
 148         { AU1550_UART0_INT, IRQ_TYPE_LEVEL_HIGH, 0 },
 149         { AU1550_PCI_INTA, IRQ_TYPE_LEVEL_LOW, 0 },
 150         { AU1550_PCI_INTB, IRQ_TYPE_LEVEL_LOW, 0 },
 151         { AU1550_DDMA_INT, IRQ_TYPE_LEVEL_HIGH, 0 },
 152         { AU1550_CRYPTO_INT, IRQ_TYPE_LEVEL_HIGH, 0 },
 153         { AU1550_PCI_INTC, IRQ_TYPE_LEVEL_LOW, 0 },
 154         { AU1550_PCI_INTD, IRQ_TYPE_LEVEL_LOW, 0 },
 155         { AU1550_PCI_RST_INT, IRQ_TYPE_LEVEL_LOW, 0 },
 156         { AU1550_UART1_INT, IRQ_TYPE_LEVEL_HIGH, 0 },
 157         { AU1550_UART3_INT, IRQ_TYPE_LEVEL_HIGH, 0 },
 158         { AU1550_PSC0_INT, IRQ_TYPE_LEVEL_HIGH, 0 },
 159         { AU1550_PSC1_INT, IRQ_TYPE_LEVEL_HIGH, 0 },
 160         { AU1550_PSC2_INT, IRQ_TYPE_LEVEL_HIGH, 0 },
 161         { AU1550_PSC3_INT, IRQ_TYPE_LEVEL_HIGH, 0 },
 162         { AU1000_TOY_INT, IRQ_TYPE_EDGE_RISING, 0 },
 163         { AU1000_TOY_MATCH0_INT, IRQ_TYPE_EDGE_RISING, 0 },
 164         { AU1000_TOY_MATCH1_INT, IRQ_TYPE_EDGE_RISING, 0 },
 165         { AU1000_TOY_MATCH2_INT, IRQ_TYPE_EDGE_RISING, 1 },
 166         { AU1000_RTC_INT, IRQ_TYPE_EDGE_RISING, 0 },
 167         { AU1000_RTC_MATCH0_INT, IRQ_TYPE_EDGE_RISING, 0 },
 168         { AU1000_RTC_MATCH1_INT, IRQ_TYPE_EDGE_RISING, 0 },
 169         { AU1000_RTC_MATCH2_INT, IRQ_TYPE_EDGE_RISING, 0 },
 170         { AU1550_NAND_INT, IRQ_TYPE_EDGE_RISING, 0 },
 171         { AU1550_USB_DEV_REQ_INT, IRQ_TYPE_LEVEL_HIGH, 0 },
 172         { AU1550_USB_DEV_SUS_INT, IRQ_TYPE_EDGE_RISING, 0 },
 173         { AU1550_USB_HOST_INT, IRQ_TYPE_LEVEL_LOW, 0 },
 174         { AU1550_MAC0_DMA_INT, IRQ_TYPE_LEVEL_HIGH, 0 },
 175         { AU1550_MAC1_DMA_INT, IRQ_TYPE_LEVEL_HIGH, 0 },
 176
 177 #elif defined(CONFIG_SOC_AU1200)
 178
 179         { AU1200_UART0_INT, IRQ_TYPE_LEVEL_HIGH, 0 },
 180         { AU1200_SWT_INT, IRQ_TYPE_EDGE_RISING, 0 },
 181         { AU1200_SD_INT, IRQ_TYPE_LEVEL_HIGH, 0 },
 182         { AU1200_DDMA_INT, IRQ_TYPE_LEVEL_HIGH, 0 },
 183         { AU1200_MAE_BE_INT, IRQ_TYPE_LEVEL_HIGH, 0 },
 184         { AU1200_UART1_INT, IRQ_TYPE_LEVEL_HIGH, 0 },
 185         { AU1200_MAE_FE_INT, IRQ_TYPE_LEVEL_HIGH, 0 },
 186         { AU1200_PSC0_INT, IRQ_TYPE_LEVEL_HIGH, 0 },
 187         { AU1200_PSC1_INT, IRQ_TYPE_LEVEL_HIGH, 0 },
 188         { AU1200_AES_INT, IRQ_TYPE_LEVEL_HIGH, 0 },
 189         { AU1200_CAMERA_INT, IRQ_TYPE_LEVEL_HIGH, 0 },
 190         { AU1000_TOY_INT, IRQ_TYPE_EDGE_RISING, 0 },
 191         { AU1000_TOY_MATCH0_INT, IRQ_TYPE_EDGE_RISING, 0 },
 192         { AU1000_TOY_MATCH1_INT, IRQ_TYPE_EDGE_RISING, 0 },
 193         { AU1000_TOY_MATCH2_INT, IRQ_TYPE_EDGE_RISING, 1 },
 194         { AU1000_RTC_INT, IRQ_TYPE_EDGE_RISING, 0 },
 195         { AU1000_RTC_MATCH0_INT, IRQ_TYPE_EDGE_RISING, 0 },
 196         { AU1000_RTC_MATCH1_INT, IRQ_TYPE_EDGE_RISING, 0 },
 197         { AU1000_RTC_MATCH2_INT, IRQ_TYPE_EDGE_RISING, 0 },
 198         { AU1200_NAND_INT, IRQ_TYPE_EDGE_RISING, 0 },
 199         { AU1200_USB_INT, IRQ_TYPE_LEVEL_HIGH, 0 },
 200         { AU1200_LCD_INT, IRQ_TYPE_LEVEL_HIGH, 0 },
 201         { AU1200_MAE_BOTH_INT, IRQ_TYPE_LEVEL_HIGH, 0 },
 202
 203 #else
 204 #error "Error: Unknown Alchemy SOC"
 205 #endif
 206 };
 207
 208
 209 #ifdef CONFIG_PM
 210
 211 /*
 212  * Save/restore the interrupt controller state.
 213  * Called from the save/restore core registers as part of the
 214  * au_sleep function in power.c.....maybe I should just pm_register()
 215  * them instead?
 216  */
 217 static unsigned int     sleep_intctl_config0[2];
 218 static unsigned int     sleep_intctl_config1[2];
 219 static unsigned int     sleep_intctl_config2[2];
 220 static unsigned int     sleep_intctl_src[2];
 221 static unsigned int     sleep_intctl_assign[2];
 222 static unsigned int     sleep_intctl_wake[2];
 223 static unsigned int     sleep_intctl_mask[2];
 224
 225 void save_au1xxx_intctl(void)
 226 {
 227         sleep_intctl_config0[0] = au_readl(IC0_CFG0RD);
 228         sleep_intctl_config1[0] = au_readl(IC0_CFG1RD);
 229         sleep_intctl_config2[0] = au_readl(IC0_CFG2RD);
 230         sleep_intctl_src[0] = au_readl(IC0_SRCRD);
 231         sleep_intctl_assign[0] = au_readl(IC0_ASSIGNRD);
 232         sleep_intctl_wake[0] = au_readl(IC0_WAKERD);
 233         sleep_intctl_mask[0] = au_readl(IC0_MASKRD);
 234
 235         sleep_intctl_config0[1] = au_readl(IC1_CFG0RD);
 236         sleep_intctl_config1[1] = au_readl(IC1_CFG1RD);
 237         sleep_intctl_config2[1] = au_readl(IC1_CFG2RD);
 238         sleep_intctl_src[1] = au_readl(IC1_SRCRD);
 239         sleep_intctl_assign[1] = au_readl(IC1_ASSIGNRD);
 240         sleep_intctl_wake[1] = au_readl(IC1_WAKERD);
 241         sleep_intctl_mask[1] = au_readl(IC1_MASKRD);
 242 }
 243
 244 /*
 245  * For most restore operations, we clear the entire register and
 246  * then set the bits we found during the save.
 247  */
 248 void restore_au1xxx_intctl(void)
 249 {
 250         au_writel(0xffffffff, IC0_MASKCLR); au_sync();
 251
 252         au_writel(0xffffffff, IC0_CFG0CLR); au_sync();
 253         au_writel(sleep_intctl_config0[0], IC0_CFG0SET); au_sync();
 254         au_writel(0xffffffff, IC0_CFG1CLR); au_sync();
 255         au_writel(sleep_intctl_config1[0], IC0_CFG1SET); au_sync();
 256         au_writel(0xffffffff, IC0_CFG2CLR); au_sync();
 257         au_writel(sleep_intctl_config2[0], IC0_CFG2SET); au_sync();
 258         au_writel(0xffffffff, IC0_SRCCLR); au_sync();
 259         au_writel(sleep_intctl_src[0], IC0_SRCSET); au_sync();
 260         au_writel(0xffffffff, IC0_ASSIGNCLR); au_sync();
 261         au_writel(sleep_intctl_assign[0], IC0_ASSIGNSET); au_sync();
 262         au_writel(0xffffffff, IC0_WAKECLR); au_sync();
 263         au_writel(sleep_intctl_wake[0], IC0_WAKESET); au_sync();
 264         au_writel(0xffffffff, IC0_RISINGCLR); au_sync();
 265         au_writel(0xffffffff, IC0_FALLINGCLR); au_sync();
 266         au_writel(0x00000000, IC0_TESTBIT); au_sync();
 267
 268         au_writel(0xffffffff, IC1_MASKCLR); au_sync();
 269
 270         au_writel(0xffffffff, IC1_CFG0CLR); au_sync();
 271         au_writel(sleep_intctl_config0[1], IC1_CFG0SET); au_sync();
 272         au_writel(0xffffffff, IC1_CFG1CLR); au_sync();
 273         au_writel(sleep_intctl_config1[1], IC1_CFG1SET); au_sync();
 274         au_writel(0xffffffff, IC1_CFG2CLR); au_sync();
 275         au_writel(sleep_intctl_config2[1], IC1_CFG2SET); au_sync();
 276         au_writel(0xffffffff, IC1_SRCCLR); au_sync();
 277         au_writel(sleep_intctl_src[1], IC1_SRCSET); au_sync();
 278         au_writel(0xffffffff, IC1_ASSIGNCLR); au_sync();
 279         au_writel(sleep_intctl_assign[1], IC1_ASSIGNSET); au_sync();
 280         au_writel(0xffffffff, IC1_WAKECLR); au_sync();
 281         au_writel(sleep_intctl_wake[1], IC1_WAKESET); au_sync();
 282         au_writel(0xffffffff, IC1_RISINGCLR); au_sync();
 283         au_writel(0xffffffff, IC1_FALLINGCLR); au_sync();
 284         au_writel(0x00000000, IC1_TESTBIT); au_sync();
 285
 286         au_writel(sleep_intctl_mask[1], IC1_MASKSET); au_sync();
 287
 288         au_writel(sleep_intctl_mask[0], IC0_MASKSET); au_sync();
 289 }
 290 #endif /* CONFIG_PM */
 291
 292
 293 static void au1x_ic0_unmask(unsigned int irq_nr)
 294 {
 295         unsigned int bit = irq_nr - AU1000_INTC0_INT_BASE;
 296         au_writel(1 << bit, IC0_MASKSET);
 297         au_writel(1 << bit, IC0_WAKESET);
 298         au_sync();
 299 }
 300
 301 static void au1x_ic1_unmask(unsigned int irq_nr)
 302 {
 303         unsigned int bit = irq_nr - AU1000_INTC1_INT_BASE;
 304         au_writel(1 << bit, IC1_MASKSET);
 305         au_writel(1 << bit, IC1_WAKESET);
 306
 307 /* very hacky. does the pb1000 cpld auto-disable this int?
 308  * nowhere in the current kernel sources is it disabled.        --mlau
 309  */
 310 #if defined(CONFIG_MIPS_PB1000)
 311         if (irq_nr == AU1000_GPIO_15)
 312                 au_writel(0x4000, PB1000_MDR); /* enable int */
 313 #endif
 314         au_sync();
 315 }
 316
 317 static void au1x_ic0_mask(unsigned int irq_nr)
 318 {
 319         unsigned int bit = irq_nr - AU1000_INTC0_INT_BASE;
 320         au_writel(1 << bit, IC0_MASKCLR);
 321         au_writel(1 << bit, IC0_WAKECLR);
 322         au_sync();
 323 }
 324
 325 static void au1x_ic1_mask(unsigned int irq_nr)
 326 {
 327         unsigned int bit = irq_nr - AU1000_INTC1_INT_BASE;
 328         au_writel(1 << bit, IC1_MASKCLR);
 329         au_writel(1 << bit, IC1_WAKECLR);
 330         au_sync();
 331 }
 332
 333 static void au1x_ic0_ack(unsigned int irq_nr)
 334 {
 335         unsigned int bit = irq_nr - AU1000_INTC0_INT_BASE;
 336
 337         /*
 338          * This may assume that we don't get interrupts from
 339          * both edges at once, or if we do, that we don't care.
 340          */
 341         au_writel(1 << bit, IC0_FALLINGCLR);
 342         au_writel(1 << bit, IC0_RISINGCLR);
 343         au_sync();
 344 }
 345
 346 static void au1x_ic1_ack(unsigned int irq_nr)
 347 {
 348         unsigned int bit = irq_nr - AU1000_INTC1_INT_BASE;
 349
 350         /*
 351          * This may assume that we don't get interrupts from
 352          * both edges at once, or if we do, that we don't care.
 353          */
 354         au_writel(1 << bit, IC1_FALLINGCLR);
 355         au_writel(1 << bit, IC1_RISINGCLR);
 356         au_sync();
 357 }
 358
 359 static int au1x_ic1_setwake(unsigned int irq, unsigned int on)
 360 {
 361         unsigned int bit = irq - AU1000_INTC1_INT_BASE;
 362         unsigned long wakemsk, flags;
 363
 364         /* only GPIO 0-7 can act as wakeup source: */
 365         if ((irq < AU1000_GPIO_0) || (irq > AU1000_GPIO_7))
 366                 return -EINVAL;
 367
 368         local_irq_save(flags);
 369         wakemsk = au_readl(SYS_WAKEMSK);
 370         if (on)
 371                 wakemsk |= 1 << bit;
 372         else
 373                 wakemsk &= ~(1 << bit);
 374         au_writel(wakemsk, SYS_WAKEMSK);
 375         au_sync();
 376         local_irq_restore(flags);
 377
 378         return 0;
 379 }
 380
 381 /*
 382  * irq_chips for both ICs; this way the mask handlers can be
 383  * as short as possible.
 384  *
 385  * NOTE: the ->ack() callback is used by the handle_edge_irq
 386  *       flowhandler only, the ->mask_ack() one by handle_level_irq,
 387  *       so no need for an irq_chip for each type of irq (level/edge).
 388  */
 389 static struct irq_chip au1x_ic0_chip = {
 390         .name           = "Alchemy-IC0",
 391         .ack            = au1x_ic0_ack,         /* edge */
 392         .mask           = au1x_ic0_mask,
 393         .mask_ack       = au1x_ic0_mask,        /* level */
 394         .unmask         = au1x_ic0_unmask,
 395         .set_type       = au1x_ic_settype,
 396 };
 397
 398 static struct irq_chip au1x_ic1_chip = {
 399         .name           = "Alchemy-IC1",
 400         .ack            = au1x_ic1_ack,         /* edge */
 401         .mask           = au1x_ic1_mask,
 402         .mask_ack       = au1x_ic1_mask,        /* level */
 403         .unmask         = au1x_ic1_unmask,
 404         .set_type       = au1x_ic_settype,
 405         .set_wake       = au1x_ic1_setwake,
 406 };
 407
 408 static int au1x_ic_settype(unsigned int irq, unsigned int flow_type)
 409 {
 410         struct irq_chip *chip;
 411         unsigned long icr[6];
 412         unsigned int bit, ic;
 413         int ret;
 414
 415         if (irq >= AU1000_INTC1_INT_BASE) {
 416                 bit = irq - AU1000_INTC1_INT_BASE;
 417                 chip = &au1x_ic1_chip;
 418                 ic = 1;
 419         } else {
 420                 bit = irq - AU1000_INTC0_INT_BASE;
 421                 chip = &au1x_ic0_chip;
 422                 ic = 0;
 423         }
 424
 425         if (bit > 31)
 426                 return -EINVAL;
 427
 428         icr[0] = ic ? IC1_CFG0SET : IC0_CFG0SET;
 429         icr[1] = ic ? IC1_CFG1SET : IC0_CFG1SET;
 430         icr[2] = ic ? IC1_CFG2SET : IC0_CFG2SET;
 431         icr[3] = ic ? IC1_CFG0CLR : IC0_CFG0CLR;
 432         icr[4] = ic ? IC1_CFG1CLR : IC0_CFG1CLR;
 433         icr[5] = ic ? IC1_CFG2CLR : IC0_CFG2CLR;
 434
 435         ret = 0;
 436
 437         switch (flow_type) {    /* cfgregs 2:1:0 */
 438         case IRQ_TYPE_EDGE_RISING:      /* 0:0:1 */
 439                 au_writel(1 << bit, icr[5]);
 440                 au_writel(1 << bit, icr[4]);
 441                 au_writel(1 << bit, icr[0]);
 442                 set_irq_chip_and_handler_name(irq, chip,
 443                                 handle_edge_irq, "riseedge");
 444                 break;
 445         case IRQ_TYPE_EDGE_FALLING:     /* 0:1:0 */
 446                 au_writel(1 << bit, icr[5]);
 447                 au_writel(1 << bit, icr[1]);
 448                 au_writel(1 << bit, icr[3]);
 449                 set_irq_chip_and_handler_name(irq, chip,
 450                                 handle_edge_irq, "falledge");
 451                 break;
 452         case IRQ_TYPE_EDGE_BOTH:        /* 0:1:1 */
 453                 au_writel(1 << bit, icr[5]);
 454                 au_writel(1 << bit, icr[1]);
 455                 au_writel(1 << bit, icr[0]);
 456                 set_irq_chip_and_handler_name(irq, chip,
 457                                 handle_edge_irq, "bothedge");
 458                 break;
 459         case IRQ_TYPE_LEVEL_HIGH:       /* 1:0:1 */
 460                 au_writel(1 << bit, icr[2]);
 461                 au_writel(1 << bit, icr[4]);
 462                 au_writel(1 << bit, icr[0]);
 463                 set_irq_chip_and_handler_name(irq, chip,
 464                                 handle_level_irq, "hilevel");
 465                 break;
 466         case IRQ_TYPE_LEVEL_LOW:        /* 1:1:0 */
 467                 au_writel(1 << bit, icr[2]);
 468                 au_writel(1 << bit, icr[1]);
 469                 au_writel(1 << bit, icr[3]);
 470                 set_irq_chip_and_handler_name(irq, chip,
 471                                 handle_level_irq, "lowlevel");
 472                 break;
 473         case IRQ_TYPE_NONE:             /* 0:0:0 */
 474                 au_writel(1 << bit, icr[5]);
 475                 au_writel(1 << bit, icr[4]);
 476                 au_writel(1 << bit, icr[3]);
 477                 /* set at least chip so we can call set_irq_type() on it */
 478                 set_irq_chip(irq, chip);
 479                 break;
 480         default:
 481                 ret = -EINVAL;
 482         }
 483         au_sync();
 484
 485         return ret;
 486 }
 487
 488 asmlinkage void plat_irq_dispatch(void)
 489 {
 490         unsigned int pending = read_c0_status() & read_c0_cause();
 491         unsigned long s, off, bit;
 492
 493         if (pending & CAUSEF_IP7) {
 494                 do_IRQ(MIPS_CPU_IRQ_BASE + 7);
 495                 return;
 496         } else if (pending & CAUSEF_IP2) {
 497                 s = IC0_REQ0INT;
 498                 off = AU1000_INTC0_INT_BASE;
 499         } else if (pending & CAUSEF_IP3) {
 500                 s = IC0_REQ1INT;
 501                 off = AU1000_INTC0_INT_BASE;
 502         } else if (pending & CAUSEF_IP4) {
 503                 s = IC1_REQ0INT;
 504                 off = AU1000_INTC1_INT_BASE;
 505         } else if (pending & CAUSEF_IP5) {
 506                 s = IC1_REQ1INT;
 507                 off = AU1000_INTC1_INT_BASE;
 508         } else
 509                 goto spurious;
 510
 511         bit = 0;
 512         s = au_readl(s);
 513         if (unlikely(!s)) {
 514 spurious:
 515                 spurious_interrupt();
 516                 return;
 517         }
 518 #ifdef AU1000_USB_DEV_REQ_INT
 519         /*
 520          * Because of the tight timing of SETUP token to reply
 521          * transactions, the USB devices-side packet complete
 522          * interrupt needs the highest priority.
 523          */
 524         bit = 1 << (AU1000_USB_DEV_REQ_INT - AU1000_INTC0_INT_BASE);
 525         if ((pending & CAUSEF_IP2) && (s & bit)) {
 526                 do_IRQ(AU1000_USB_DEV_REQ_INT);
 527                 return;
 528         }
 529 #endif
 530         do_IRQ(__ffs(s) + off);
 531 }
 532
 533 /* setup edge/level and assign request 0/1 */
 534 void __init au1xxx_setup_irqmap(struct au1xxx_irqmap *map, int count)
 535 {
 536         unsigned int bit, irq_nr;
 537
 538         while (count--) {
 539                 irq_nr = map[count].im_irq;
 540
 541                 if (((irq_nr < AU1000_INTC0_INT_BASE) ||
 542                      (irq_nr >= AU1000_INTC0_INT_BASE + 32)) &&
 543                     ((irq_nr < AU1000_INTC1_INT_BASE) ||
 544                      (irq_nr >= AU1000_INTC1_INT_BASE + 32)))
 545                         continue;
 546
 547                 if (irq_nr >= AU1000_INTC1_INT_BASE) {
 548                         bit = irq_nr - AU1000_INTC1_INT_BASE;
 549                         if (map[count].im_request)
 550                                 au_writel(1 << bit, IC1_ASSIGNCLR);
 551                 } else {
 552                         bit = irq_nr - AU1000_INTC0_INT_BASE;
 553                         if (map[count].im_request)
 554                                 au_writel(1 << bit, IC0_ASSIGNCLR);
 555                 }
 556
 557                 au1x_ic_settype(irq_nr, map[count].im_type);
 558         }
 559 }
 560
 561 void __init arch_init_irq(void)
 562 {
 563         int i;
 564
 565         /*
 566          * Initialize interrupt controllers to a safe state.
 567          */
 568         au_writel(0xffffffff, IC0_CFG0CLR);
 569         au_writel(0xffffffff, IC0_CFG1CLR);
 570         au_writel(0xffffffff, IC0_CFG2CLR);
 571         au_writel(0xffffffff, IC0_MASKCLR);
 572         au_writel(0xffffffff, IC0_ASSIGNSET);
 573         au_writel(0xffffffff, IC0_WAKECLR);
 574         au_writel(0xffffffff, IC0_SRCSET);
 575         au_writel(0xffffffff, IC0_FALLINGCLR);
 576         au_writel(0xffffffff, IC0_RISINGCLR);
 577         au_writel(0x00000000, IC0_TESTBIT);
 578
 579         au_writel(0xffffffff, IC1_CFG0CLR);
 580         au_writel(0xffffffff, IC1_CFG1CLR);
 581         au_writel(0xffffffff, IC1_CFG2CLR);
 582         au_writel(0xffffffff, IC1_MASKCLR);
 583         au_writel(0xffffffff, IC1_ASSIGNSET);
 584         au_writel(0xffffffff, IC1_WAKECLR);
 585         au_writel(0xffffffff, IC1_SRCSET);
 586         au_writel(0xffffffff, IC1_FALLINGCLR);
 587         au_writel(0xffffffff, IC1_RISINGCLR);
 588         au_writel(0x00000000, IC1_TESTBIT);
 589
 590         mips_cpu_irq_init();
 591
 592         /* register all 64 possible IC0+IC1 irq sources as type "none".
 593          * Use set_irq_type() to set edge/level behaviour at runtime.
 594          */
 595         for (i = AU1000_INTC0_INT_BASE;
 596              (i < AU1000_INTC0_INT_BASE + 32); i++)
 597                 au1x_ic_settype(i, IRQ_TYPE_NONE);
 598
 599         for (i = AU1000_INTC1_INT_BASE;
 600              (i < AU1000_INTC1_INT_BASE + 32); i++)
 601                 au1x_ic_settype(i, IRQ_TYPE_NONE);
 602
 603         /*
 604          * Initialize IC0, which is fixed per processor.
 605          */
 606         au1xxx_setup_irqmap(au1xxx_ic0_map, ARRAY_SIZE(au1xxx_ic0_map));
 607
 608         /* Boards can register additional (GPIO-based) IRQs.
 609         */
 610         board_init_irq();
 611
 612         set_c0_status(IE_IRQ0 | IE_IRQ1 | IE_IRQ2 | IE_IRQ3);
 613 }
 614
 615 unsigned long save_local_and_disable(int controller)
 616 {
 617         int i;
 618         unsigned long flags, mask;
 619
 620         spin_lock_irqsave(&irq_lock, flags);
 621         if (controller) {
 622                 mask = au_readl(IC1_MASKSET);
 623                 for (i = 0; i < 32; i++)
 624                         au1x_ic1_mask(i + AU1000_INTC1_INT_BASE);
 625         } else {
 626                 mask = au_readl(IC0_MASKSET);
 627                 for (i = 0; i < 32; i++)
 628                         au1x_ic0_mask(i + AU1000_INTC0_INT_BASE);
 629         }
 630         spin_unlock_irqrestore(&irq_lock, flags);
 631
 632         return mask;
 633 }
 634
 635 void restore_local_and_enable(int controller, unsigned long mask)
 636 {
 637         int i;
 638         unsigned long flags, new_mask;
 639
 640         spin_lock_irqsave(&irq_lock, flags);
 641         for (i = 0; i < 32; i++)
 642                 if (mask & (1 << i)) {
 643                         if (controller)
 644                                 au1x_ic1_unmask(i + AU1000_INTC1_INT_BASE);
 645                         else
 646                                 au1x_ic0_unmask(i + AU1000_INTC0_INT_BASE);
 647                 }
 648
 649         if (controller)
 650                 new_mask = au_readl(IC1_MASKSET);
 651         else
 652                 new_mask = au_readl(IC0_MASKSET);
 653
 654         spin_unlock_irqrestore(&irq_lock, flags);
 655 }