arch/powerpc/sysdev/cpm1.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 /*
   3  * General Purpose functions for the global management of the
   4  * Communication Processor Module.
   5  * Copyright (c) 1997 Dan error_act (dmalek@jlc.net)
   6  *
   7  * In addition to the individual control of the communication
   8  * channels, there are a few functions that globally affect the
   9  * communication processor.
  10  *
  11  * Buffer descriptors must be allocated from the dual ported memory
  12  * space.  The allocator for that is here.  When the communication
  13  * process is reset, we reclaim the memory available.  There is
  14  * currently no deallocator for this memory.
  15  * The amount of space available is platform dependent.  On the
  16  * MBX, the EPPC software loads additional microcode into the
  17  * communication processor, and uses some of the DP ram for this
  18  * purpose.  Current, the first 512 bytes and the last 256 bytes of
  19  * memory are used.  Right now I am conservative and only use the
  20  * memory that can never be used for microcode.  If there are
  21  * applications that require more DP ram, we can expand the boundaries
  22  * but then we have to be careful of any downloaded microcode.
  23  */
  24 #include <linux/errno.h>
  25 #include <linux/sched.h>
  26 #include <linux/kernel.h>
  27 #include <linux/dma-mapping.h>
  28 #include <linux/param.h>
  29 #include <linux/string.h>
  30 #include <linux/mm.h>
  31 #include <linux/interrupt.h>
  32 #include <linux/irq.h>
  33 #include <linux/module.h>
  34 #include <linux/spinlock.h>
  35 #include <linux/slab.h>
  36 #include <asm/page.h>
  37 #include <asm/pgtable.h>
  38 #include <asm/8xx_immap.h>
  39 #include <asm/cpm1.h>
  40 #include <asm/io.h>
  41 #include <asm/tlbflush.h>
  42 #include <asm/rheap.h>
  43 #include <asm/prom.h>
  44 #include <asm/cpm.h>
  45
  46 #include <asm/fs_pd.h>
  47
  48 #ifdef CONFIG_8xx_GPIO
  49 #include <linux/of_gpio.h>
  50 #endif
  51
  52 #define CPM_MAP_SIZE    (0x4000)
  53
  54 cpm8xx_t __iomem *cpmp;  /* Pointer to comm processor space */
  55 immap_t __iomem *mpc8xx_immr;
  56 static cpic8xx_t __iomem *cpic_reg;
  57
  58 static struct irq_domain *cpm_pic_host;
  59
  60 static void cpm_mask_irq(struct irq_data *d)
  61 {
  62         unsigned int cpm_vec = (unsigned int)irqd_to_hwirq(d);
  63
  64         clrbits32(&cpic_reg->cpic_cimr, (1 << cpm_vec));
  65 }
  66
  67 static void cpm_unmask_irq(struct irq_data *d)
  68 {
  69         unsigned int cpm_vec = (unsigned int)irqd_to_hwirq(d);
  70
  71         setbits32(&cpic_reg->cpic_cimr, (1 << cpm_vec));
  72 }
  73
  74 static void cpm_end_irq(struct irq_data *d)
  75 {
  76         unsigned int cpm_vec = (unsigned int)irqd_to_hwirq(d);
  77
  78         out_be32(&cpic_reg->cpic_cisr, (1 << cpm_vec));
  79 }
  80
  81 static struct irq_chip cpm_pic = {
  82         .name = "CPM PIC",
  83         .irq_mask = cpm_mask_irq,
  84         .irq_unmask = cpm_unmask_irq,
  85         .irq_eoi = cpm_end_irq,
  86 };
  87
  88 int cpm_get_irq(void)
  89 {
  90         int cpm_vec;
  91
  92         /* Get the vector by setting the ACK bit and then reading
  93          * the register.
  94          */
  95         out_be16(&cpic_reg->cpic_civr, 1);
  96         cpm_vec = in_be16(&cpic_reg->cpic_civr);
  97         cpm_vec >>= 11;
  98
  99         return irq_linear_revmap(cpm_pic_host, cpm_vec);
 100 }
 101
 102 static int cpm_pic_host_map(struct irq_domain *h, unsigned int virq,
 103                           irq_hw_number_t hw)
 104 {
 105         pr_debug("cpm_pic_host_map(%d, 0x%lx)\n", virq, hw);
 106
 107         irq_set_status_flags(virq, IRQ_LEVEL);
 108         irq_set_chip_and_handler(virq, &cpm_pic, handle_fasteoi_irq);
 109         return 0;
 110 }
 111
 112 /* The CPM can generate the error interrupt when there is a race condition
 113  * between generating and masking interrupts.  All we have to do is ACK it
 114  * and return.  This is a no-op function so we don't need any special
 115  * tests in the interrupt handler.
 116  */
 117 static irqreturn_t cpm_error_interrupt(int irq, void *dev)
 118 {
 119         return IRQ_HANDLED;
 120 }
 121
 122 static struct irqaction cpm_error_irqaction = {
 123         .handler = cpm_error_interrupt,
 124         .flags = IRQF_NO_THREAD,
 125         .name = "error",
 126 };
 127
 128 static const struct irq_domain_ops cpm_pic_host_ops = {
 129         .map = cpm_pic_host_map,
 130 };
 131
 132 unsigned int cpm_pic_init(void)
 133 {
 134         struct device_node *np = NULL;
 135         struct resource res;
 136         unsigned int sirq = 0, hwirq, eirq;
 137         int ret;
 138
 139         pr_debug("cpm_pic_init\n");
 140
 141         np = of_find_compatible_node(NULL, NULL, "fsl,cpm1-pic");
 142         if (np == NULL)
 143                 np = of_find_compatible_node(NULL, "cpm-pic", "CPM");
 144         if (np == NULL) {
 145                 printk(KERN_ERR "CPM PIC init: can not find cpm-pic node\n");
 146                 return sirq;
 147         }
 148
 149         ret = of_address_to_resource(np, 0, &res);
 150         if (ret)
 151                 goto end;
 152
 153         cpic_reg = ioremap(res.start, resource_size(&res));
 154         if (cpic_reg == NULL)
 155                 goto end;
 156
 157         sirq = irq_of_parse_and_map(np, 0);
 158         if (!sirq)
 159                 goto end;
 160
 161         /* Initialize the CPM interrupt controller. */
 162         hwirq = (unsigned int)virq_to_hw(sirq);
 163         out_be32(&cpic_reg->cpic_cicr,
 164             (CICR_SCD_SCC4 | CICR_SCC_SCC3 | CICR_SCB_SCC2 | CICR_SCA_SCC1) |
 165                 ((hwirq/2) << 13) | CICR_HP_MASK);
 166
 167         out_be32(&cpic_reg->cpic_cimr, 0);
 168
 169         cpm_pic_host = irq_domain_add_linear(np, 64, &cpm_pic_host_ops, NULL);
 170         if (cpm_pic_host == NULL) {
 171                 printk(KERN_ERR "CPM2 PIC: failed to allocate irq host!\n");
 172                 sirq = 0;
 173                 goto end;
 174         }
 175
 176         /* Install our own error handler. */
 177         np = of_find_compatible_node(NULL, NULL, "fsl,cpm1");
 178         if (np == NULL)
 179                 np = of_find_node_by_type(NULL, "cpm");
 180         if (np == NULL) {
 181                 printk(KERN_ERR "CPM PIC init: can not find cpm node\n");
 182                 goto end;
 183         }
 184
 185         eirq = irq_of_parse_and_map(np, 0);
 186         if (!eirq)
 187                 goto end;
 188
 189         if (setup_irq(eirq, &cpm_error_irqaction))
 190                 printk(KERN_ERR "Could not allocate CPM error IRQ!");
 191
 192         setbits32(&cpic_reg->cpic_cicr, CICR_IEN);
 193
 194 end:
 195         of_node_put(np);
 196         return sirq;
 197 }
 198
 199 void __init cpm_reset(void)
 200 {
 201         sysconf8xx_t __iomem *siu_conf;
 202
 203         mpc8xx_immr = ioremap(get_immrbase(), 0x4000);
 204         if (!mpc8xx_immr) {
 205                 printk(KERN_CRIT "Could not map IMMR\n");
 206                 return;
 207         }
 208
 209         cpmp = &mpc8xx_immr->im_cpm;
 210
 211 #ifndef CONFIG_PPC_EARLY_DEBUG_CPM
 212         /* Perform a reset.
 213         */
 214         out_be16(&cpmp->cp_cpcr, CPM_CR_RST | CPM_CR_FLG);
 215
 216         /* Wait for it.
 217         */
 218         while (in_be16(&cpmp->cp_cpcr) & CPM_CR_FLG);
 219 #endif
 220
 221 #ifdef CONFIG_UCODE_PATCH
 222         cpm_load_patch(cpmp);
 223 #endif
 224
 225         /* Set SDMA Bus Request priority 5.
 226          * On 860T, this also enables FEC priority 6.  I am not sure
 227          * this is what we really want for some applications, but the
 228          * manual recommends it.
 229          * Bit 25, FAM can also be set to use FEC aggressive mode (860T).
 230          */
 231         siu_conf = immr_map(im_siu_conf);
 232         if ((mfspr(SPRN_IMMR) & 0xffff) == 0x0900) /* MPC885 */
 233                 out_be32(&siu_conf->sc_sdcr, 0x40);
 234         else
 235                 out_be32(&siu_conf->sc_sdcr, 1);
 236         immr_unmap(siu_conf);
 237 }
 238
 239 static DEFINE_SPINLOCK(cmd_lock);
 240
 241 #define MAX_CR_CMD_LOOPS        10000
 242
 243 int cpm_command(u32 command, u8 opcode)
 244 {
 245         int i, ret;
 246         unsigned long flags;
 247
 248         if (command & 0xffffff0f)
 249                 return -EINVAL;
 250
 251         spin_lock_irqsave(&cmd_lock, flags);
 252
 253         ret = 0;
 254         out_be16(&cpmp->cp_cpcr, command | CPM_CR_FLG | (opcode << 8));
 255         for (i = 0; i < MAX_CR_CMD_LOOPS; i++)
 256                 if ((in_be16(&cpmp->cp_cpcr) & CPM_CR_FLG) == 0)
 257                         goto out;
 258
 259         printk(KERN_ERR "%s(): Not able to issue CPM command\n", __func__);
 260         ret = -EIO;
 261 out:
 262         spin_unlock_irqrestore(&cmd_lock, flags);
 263         return ret;
 264 }
 265 EXPORT_SYMBOL(cpm_command);
 266
 267 /* Set a baud rate generator.  This needs lots of work.  There are
 268  * four BRGs, any of which can be wired to any channel.
 269  * The internal baud rate clock is the system clock divided by 16.
 270  * This assumes the baudrate is 16x oversampled by the uart.
 271  */
 272 #define BRG_INT_CLK             (get_brgfreq())
 273 #define BRG_UART_CLK            (BRG_INT_CLK/16)
 274 #define BRG_UART_CLK_DIV16      (BRG_UART_CLK/16)
 275
 276 void
 277 cpm_setbrg(uint brg, uint rate)
 278 {
 279         u32 __iomem *bp;
 280
 281         /* This is good enough to get SMCs running.....
 282         */
 283         bp = &cpmp->cp_brgc1;
 284         bp += brg;
 285         /* The BRG has a 12-bit counter.  For really slow baud rates (or
 286          * really fast processors), we may have to further divide by 16.
 287          */
 288         if (((BRG_UART_CLK / rate) - 1) < 4096)
 289                 out_be32(bp, (((BRG_UART_CLK / rate) - 1) << 1) | CPM_BRG_EN);
 290         else
 291                 out_be32(bp, (((BRG_UART_CLK_DIV16 / rate) - 1) << 1) |
 292                               CPM_BRG_EN | CPM_BRG_DIV16);
 293 }
 294
 295 struct cpm_ioport16 {
 296         __be16 dir, par, odr_sor, dat, intr;
 297         __be16 res[3];
 298 };
 299
 300 struct cpm_ioport32b {
 301         __be32 dir, par, odr, dat;
 302 };
 303
 304 struct cpm_ioport32e {
 305         __be32 dir, par, sor, odr, dat;
 306 };
 307
 308 static void cpm1_set_pin32(int port, int pin, int flags)
 309 {
 310         struct cpm_ioport32e __iomem *iop;
 311         pin = 1 << (31 - pin);
 312
 313         if (port == CPM_PORTB)
 314                 iop = (struct cpm_ioport32e __iomem *)
 315                       &mpc8xx_immr->im_cpm.cp_pbdir;
 316         else
 317                 iop = (struct cpm_ioport32e __iomem *)
 318                       &mpc8xx_immr->im_cpm.cp_pedir;
 319
 320         if (flags & CPM_PIN_OUTPUT)
 321                 setbits32(&iop->dir, pin);
 322         else
 323                 clrbits32(&iop->dir, pin);
 324
 325         if (!(flags & CPM_PIN_GPIO))
 326                 setbits32(&iop->par, pin);
 327         else
 328                 clrbits32(&iop->par, pin);
 329
 330         if (port == CPM_PORTB) {
 331                 if (flags & CPM_PIN_OPENDRAIN)
 332                         setbits16(&mpc8xx_immr->im_cpm.cp_pbodr, pin);
 333                 else
 334                         clrbits16(&mpc8xx_immr->im_cpm.cp_pbodr, pin);
 335         }
 336
 337         if (port == CPM_PORTE) {
 338                 if (flags & CPM_PIN_SECONDARY)
 339                         setbits32(&iop->sor, pin);
 340                 else
 341                         clrbits32(&iop->sor, pin);
 342
 343                 if (flags & CPM_PIN_OPENDRAIN)
 344                         setbits32(&mpc8xx_immr->im_cpm.cp_peodr, pin);
 345                 else
 346                         clrbits32(&mpc8xx_immr->im_cpm.cp_peodr, pin);
 347         }
 348 }
 349
 350 static void cpm1_set_pin16(int port, int pin, int flags)
 351 {
 352         struct cpm_ioport16 __iomem *iop =
 353                 (struct cpm_ioport16 __iomem *)&mpc8xx_immr->im_ioport;
 354
 355         pin = 1 << (15 - pin);
 356
 357         if (port != 0)
 358                 iop += port - 1;
 359
 360         if (flags & CPM_PIN_OUTPUT)
 361                 setbits16(&iop->dir, pin);
 362         else
 363                 clrbits16(&iop->dir, pin);
 364
 365         if (!(flags & CPM_PIN_GPIO))
 366                 setbits16(&iop->par, pin);
 367         else
 368                 clrbits16(&iop->par, pin);
 369
 370         if (port == CPM_PORTA) {
 371                 if (flags & CPM_PIN_OPENDRAIN)
 372                         setbits16(&iop->odr_sor, pin);
 373                 else
 374                         clrbits16(&iop->odr_sor, pin);
 375         }
 376         if (port == CPM_PORTC) {
 377                 if (flags & CPM_PIN_SECONDARY)
 378                         setbits16(&iop->odr_sor, pin);
 379                 else
 380                         clrbits16(&iop->odr_sor, pin);
 381                 if (flags & CPM_PIN_FALLEDGE)
 382                         setbits16(&iop->intr, pin);
 383                 else
 384                         clrbits16(&iop->intr, pin);
 385         }
 386 }
 387
 388 void cpm1_set_pin(enum cpm_port port, int pin, int flags)
 389 {
 390         if (port == CPM_PORTB || port == CPM_PORTE)
 391                 cpm1_set_pin32(port, pin, flags);
 392         else
 393                 cpm1_set_pin16(port, pin, flags);
 394 }
 395
 396 int cpm1_clk_setup(enum cpm_clk_target target, int clock, int mode)
 397 {
 398         int shift;
 399         int i, bits = 0;
 400         u32 __iomem *reg;
 401         u32 mask = 7;
 402
 403         u8 clk_map[][3] = {
 404                 {CPM_CLK_SCC1, CPM_BRG1, 0},
 405                 {CPM_CLK_SCC1, CPM_BRG2, 1},
 406                 {CPM_CLK_SCC1, CPM_BRG3, 2},
 407                 {CPM_CLK_SCC1, CPM_BRG4, 3},
 408                 {CPM_CLK_SCC1, CPM_CLK1, 4},
 409                 {CPM_CLK_SCC1, CPM_CLK2, 5},
 410                 {CPM_CLK_SCC1, CPM_CLK3, 6},
 411                 {CPM_CLK_SCC1, CPM_CLK4, 7},
 412
 413                 {CPM_CLK_SCC2, CPM_BRG1, 0},
 414                 {CPM_CLK_SCC2, CPM_BRG2, 1},
 415                 {CPM_CLK_SCC2, CPM_BRG3, 2},
 416                 {CPM_CLK_SCC2, CPM_BRG4, 3},
 417                 {CPM_CLK_SCC2, CPM_CLK1, 4},
 418                 {CPM_CLK_SCC2, CPM_CLK2, 5},
 419                 {CPM_CLK_SCC2, CPM_CLK3, 6},
 420                 {CPM_CLK_SCC2, CPM_CLK4, 7},
 421
 422                 {CPM_CLK_SCC3, CPM_BRG1, 0},
 423                 {CPM_CLK_SCC3, CPM_BRG2, 1},
 424                 {CPM_CLK_SCC3, CPM_BRG3, 2},
 425                 {CPM_CLK_SCC3, CPM_BRG4, 3},
 426                 {CPM_CLK_SCC3, CPM_CLK5, 4},
 427                 {CPM_CLK_SCC3, CPM_CLK6, 5},
 428                 {CPM_CLK_SCC3, CPM_CLK7, 6},
 429                 {CPM_CLK_SCC3, CPM_CLK8, 7},
 430
 431                 {CPM_CLK_SCC4, CPM_BRG1, 0},
 432                 {CPM_CLK_SCC4, CPM_BRG2, 1},
 433                 {CPM_CLK_SCC4, CPM_BRG3, 2},
 434                 {CPM_CLK_SCC4, CPM_BRG4, 3},
 435                 {CPM_CLK_SCC4, CPM_CLK5, 4},
 436                 {CPM_CLK_SCC4, CPM_CLK6, 5},
 437                 {CPM_CLK_SCC4, CPM_CLK7, 6},
 438                 {CPM_CLK_SCC4, CPM_CLK8, 7},
 439
 440                 {CPM_CLK_SMC1, CPM_BRG1, 0},
 441                 {CPM_CLK_SMC1, CPM_BRG2, 1},
 442                 {CPM_CLK_SMC1, CPM_BRG3, 2},
 443                 {CPM_CLK_SMC1, CPM_BRG4, 3},
 444                 {CPM_CLK_SMC1, CPM_CLK1, 4},
 445                 {CPM_CLK_SMC1, CPM_CLK2, 5},
 446                 {CPM_CLK_SMC1, CPM_CLK3, 6},
 447                 {CPM_CLK_SMC1, CPM_CLK4, 7},
 448
 449                 {CPM_CLK_SMC2, CPM_BRG1, 0},
 450                 {CPM_CLK_SMC2, CPM_BRG2, 1},
 451                 {CPM_CLK_SMC2, CPM_BRG3, 2},
 452                 {CPM_CLK_SMC2, CPM_BRG4, 3},
 453                 {CPM_CLK_SMC2, CPM_CLK5, 4},
 454                 {CPM_CLK_SMC2, CPM_CLK6, 5},
 455                 {CPM_CLK_SMC2, CPM_CLK7, 6},
 456                 {CPM_CLK_SMC2, CPM_CLK8, 7},
 457         };
 458
 459         switch (target) {
 460         case CPM_CLK_SCC1:
 461                 reg = &mpc8xx_immr->im_cpm.cp_sicr;
 462                 shift = 0;
 463                 break;
 464
 465         case CPM_CLK_SCC2:
 466                 reg = &mpc8xx_immr->im_cpm.cp_sicr;
 467                 shift = 8;
 468                 break;
 469
 470         case CPM_CLK_SCC3:
 471                 reg = &mpc8xx_immr->im_cpm.cp_sicr;
 472                 shift = 16;
 473                 break;
 474
 475         case CPM_CLK_SCC4:
 476                 reg = &mpc8xx_immr->im_cpm.cp_sicr;
 477                 shift = 24;
 478                 break;
 479
 480         case CPM_CLK_SMC1:
 481                 reg = &mpc8xx_immr->im_cpm.cp_simode;
 482                 shift = 12;
 483                 break;
 484
 485         case CPM_CLK_SMC2:
 486                 reg = &mpc8xx_immr->im_cpm.cp_simode;
 487                 shift = 28;
 488                 break;
 489
 490         default:
 491                 printk(KERN_ERR "cpm1_clock_setup: invalid clock target\n");
 492                 return -EINVAL;
 493         }
 494
 495         for (i = 0; i < ARRAY_SIZE(clk_map); i++) {
 496                 if (clk_map[i][0] == target && clk_map[i][1] == clock) {
 497                         bits = clk_map[i][2];
 498                         break;
 499                 }
 500         }
 501
 502         if (i == ARRAY_SIZE(clk_map)) {
 503                 printk(KERN_ERR "cpm1_clock_setup: invalid clock combination\n");
 504                 return -EINVAL;
 505         }
 506
 507         bits <<= shift;
 508         mask <<= shift;
 509
 510         if (reg == &mpc8xx_immr->im_cpm.cp_sicr) {
 511                 if (mode == CPM_CLK_RTX) {
 512                         bits |= bits << 3;
 513                         mask |= mask << 3;
 514                 } else if (mode == CPM_CLK_RX) {
 515                         bits <<= 3;
 516                         mask <<= 3;
 517                 }
 518         }
 519
 520         out_be32(reg, (in_be32(reg) & ~mask) | bits);
 521
 522         return 0;
 523 }
 524
 525 /*
 526  * GPIO LIB API implementation
 527  */
 528 #ifdef CONFIG_8xx_GPIO
 529
 530 struct cpm1_gpio16_chip {
 531         struct of_mm_gpio_chip mm_gc;
 532         spinlock_t lock;
 533
 534         /* shadowed data register to clear/set bits safely */
 535         u16 cpdata;
 536
 537         /* IRQ associated with Pins when relevant */
 538         int irq[16];
 539 };
 540
 541 static void cpm1_gpio16_save_regs(struct of_mm_gpio_chip *mm_gc)
 542 {
 543         struct cpm1_gpio16_chip *cpm1_gc =
 544                 container_of(mm_gc, struct cpm1_gpio16_chip, mm_gc);
 545         struct cpm_ioport16 __iomem *iop = mm_gc->regs;
 546
 547         cpm1_gc->cpdata = in_be16(&iop->dat);
 548 }
 549
 550 static int cpm1_gpio16_get(struct gpio_chip *gc, unsigned int gpio)
 551 {
 552         struct of_mm_gpio_chip *mm_gc = to_of_mm_gpio_chip(gc);
 553         struct cpm_ioport16 __iomem *iop = mm_gc->regs;
 554         u16 pin_mask;
 555
 556         pin_mask = 1 << (15 - gpio);
 557
 558         return !!(in_be16(&iop->dat) & pin_mask);
 559 }
 560
 561 static void __cpm1_gpio16_set(struct of_mm_gpio_chip *mm_gc, u16 pin_mask,
 562         int value)
 563 {
 564         struct cpm1_gpio16_chip *cpm1_gc = gpiochip_get_data(&mm_gc->gc);
 565         struct cpm_ioport16 __iomem *iop = mm_gc->regs;
 566
 567         if (value)
 568                 cpm1_gc->cpdata |= pin_mask;
 569         else
 570                 cpm1_gc->cpdata &= ~pin_mask;
 571
 572         out_be16(&iop->dat, cpm1_gc->cpdata);
 573 }
 574
 575 static void cpm1_gpio16_set(struct gpio_chip *gc, unsigned int gpio, int value)
 576 {
 577         struct of_mm_gpio_chip *mm_gc = to_of_mm_gpio_chip(gc);
 578         struct cpm1_gpio16_chip *cpm1_gc = gpiochip_get_data(&mm_gc->gc);
 579         unsigned long flags;
 580         u16 pin_mask = 1 << (15 - gpio);
 581
 582         spin_lock_irqsave(&cpm1_gc->lock, flags);
 583
 584         __cpm1_gpio16_set(mm_gc, pin_mask, value);
 585
 586         spin_unlock_irqrestore(&cpm1_gc->lock, flags);
 587 }
 588
 589 static int cpm1_gpio16_to_irq(struct gpio_chip *gc, unsigned int gpio)
 590 {
 591         struct of_mm_gpio_chip *mm_gc = to_of_mm_gpio_chip(gc);
 592         struct cpm1_gpio16_chip *cpm1_gc = gpiochip_get_data(&mm_gc->gc);
 593
 594         return cpm1_gc->irq[gpio] ? : -ENXIO;
 595 }
 596
 597 static int cpm1_gpio16_dir_out(struct gpio_chip *gc, unsigned int gpio, int val)
 598 {
 599         struct of_mm_gpio_chip *mm_gc = to_of_mm_gpio_chip(gc);
 600         struct cpm1_gpio16_chip *cpm1_gc = gpiochip_get_data(&mm_gc->gc);
 601         struct cpm_ioport16 __iomem *iop = mm_gc->regs;
 602         unsigned long flags;
 603         u16 pin_mask = 1 << (15 - gpio);
 604
 605         spin_lock_irqsave(&cpm1_gc->lock, flags);
 606
 607         setbits16(&iop->dir, pin_mask);
 608         __cpm1_gpio16_set(mm_gc, pin_mask, val);
 609
 610         spin_unlock_irqrestore(&cpm1_gc->lock, flags);
 611
 612         return 0;
 613 }
 614
 615 static int cpm1_gpio16_dir_in(struct gpio_chip *gc, unsigned int gpio)
 616 {
 617         struct of_mm_gpio_chip *mm_gc = to_of_mm_gpio_chip(gc);
 618         struct cpm1_gpio16_chip *cpm1_gc = gpiochip_get_data(&mm_gc->gc);
 619         struct cpm_ioport16 __iomem *iop = mm_gc->regs;
 620         unsigned long flags;
 621         u16 pin_mask = 1 << (15 - gpio);
 622
 623         spin_lock_irqsave(&cpm1_gc->lock, flags);
 624
 625         clrbits16(&iop->dir, pin_mask);
 626
 627         spin_unlock_irqrestore(&cpm1_gc->lock, flags);
 628
 629         return 0;
 630 }
 631
 632 int cpm1_gpiochip_add16(struct device_node *np)
 633 {
 634         struct cpm1_gpio16_chip *cpm1_gc;
 635         struct of_mm_gpio_chip *mm_gc;
 636         struct gpio_chip *gc;
 637         u16 mask;
 638
 639         cpm1_gc = kzalloc(sizeof(*cpm1_gc), GFP_KERNEL);
 640         if (!cpm1_gc)
 641                 return -ENOMEM;
 642
 643         spin_lock_init(&cpm1_gc->lock);
 644
 645         if (!of_property_read_u16(np, "fsl,cpm1-gpio-irq-mask", &mask)) {
 646                 int i, j;
 647
 648                 for (i = 0, j = 0; i < 16; i++)
 649                         if (mask & (1 << (15 - i)))
 650                                 cpm1_gc->irq[i] = irq_of_parse_and_map(np, j++);
 651         }
 652
 653         mm_gc = &cpm1_gc->mm_gc;
 654         gc = &mm_gc->gc;
 655
 656         mm_gc->save_regs = cpm1_gpio16_save_regs;
 657         gc->ngpio = 16;
 658         gc->direction_input = cpm1_gpio16_dir_in;
 659         gc->direction_output = cpm1_gpio16_dir_out;
 660         gc->get = cpm1_gpio16_get;
 661         gc->set = cpm1_gpio16_set;
 662         gc->to_irq = cpm1_gpio16_to_irq;
 663
 664         return of_mm_gpiochip_add_data(np, mm_gc, cpm1_gc);
 665 }
 666
 667 struct cpm1_gpio32_chip {
 668         struct of_mm_gpio_chip mm_gc;
 669         spinlock_t lock;
 670
 671         /* shadowed data register to clear/set bits safely */
 672         u32 cpdata;
 673 };
 674
 675 static void cpm1_gpio32_save_regs(struct of_mm_gpio_chip *mm_gc)
 676 {
 677         struct cpm1_gpio32_chip *cpm1_gc =
 678                 container_of(mm_gc, struct cpm1_gpio32_chip, mm_gc);
 679         struct cpm_ioport32b __iomem *iop = mm_gc->regs;
 680
 681         cpm1_gc->cpdata = in_be32(&iop->dat);
 682 }
 683
 684 static int cpm1_gpio32_get(struct gpio_chip *gc, unsigned int gpio)
 685 {
 686         struct of_mm_gpio_chip *mm_gc = to_of_mm_gpio_chip(gc);
 687         struct cpm_ioport32b __iomem *iop = mm_gc->regs;
 688         u32 pin_mask;
 689
 690         pin_mask = 1 << (31 - gpio);
 691
 692         return !!(in_be32(&iop->dat) & pin_mask);
 693 }
 694
 695 static void __cpm1_gpio32_set(struct of_mm_gpio_chip *mm_gc, u32 pin_mask,
 696         int value)
 697 {
 698         struct cpm1_gpio32_chip *cpm1_gc = gpiochip_get_data(&mm_gc->gc);
 699         struct cpm_ioport32b __iomem *iop = mm_gc->regs;
 700
 701         if (value)
 702                 cpm1_gc->cpdata |= pin_mask;
 703         else
 704                 cpm1_gc->cpdata &= ~pin_mask;
 705
 706         out_be32(&iop->dat, cpm1_gc->cpdata);
 707 }
 708
 709 static void cpm1_gpio32_set(struct gpio_chip *gc, unsigned int gpio, int value)
 710 {
 711         struct of_mm_gpio_chip *mm_gc = to_of_mm_gpio_chip(gc);
 712         struct cpm1_gpio32_chip *cpm1_gc = gpiochip_get_data(&mm_gc->gc);
 713         unsigned long flags;
 714         u32 pin_mask = 1 << (31 - gpio);
 715
 716         spin_lock_irqsave(&cpm1_gc->lock, flags);
 717
 718         __cpm1_gpio32_set(mm_gc, pin_mask, value);
 719
 720         spin_unlock_irqrestore(&cpm1_gc->lock, flags);
 721 }
 722
 723 static int cpm1_gpio32_dir_out(struct gpio_chip *gc, unsigned int gpio, int val)
 724 {
 725         struct of_mm_gpio_chip *mm_gc = to_of_mm_gpio_chip(gc);
 726         struct cpm1_gpio32_chip *cpm1_gc = gpiochip_get_data(&mm_gc->gc);
 727         struct cpm_ioport32b __iomem *iop = mm_gc->regs;
 728         unsigned long flags;
 729         u32 pin_mask = 1 << (31 - gpio);
 730
 731         spin_lock_irqsave(&cpm1_gc->lock, flags);
 732
 733         setbits32(&iop->dir, pin_mask);
 734         __cpm1_gpio32_set(mm_gc, pin_mask, val);
 735
 736         spin_unlock_irqrestore(&cpm1_gc->lock, flags);
 737
 738         return 0;
 739 }
 740
 741 static int cpm1_gpio32_dir_in(struct gpio_chip *gc, unsigned int gpio)
 742 {
 743         struct of_mm_gpio_chip *mm_gc = to_of_mm_gpio_chip(gc);
 744         struct cpm1_gpio32_chip *cpm1_gc = gpiochip_get_data(&mm_gc->gc);
 745         struct cpm_ioport32b __iomem *iop = mm_gc->regs;
 746         unsigned long flags;
 747         u32 pin_mask = 1 << (31 - gpio);
 748
 749         spin_lock_irqsave(&cpm1_gc->lock, flags);
 750
 751         clrbits32(&iop->dir, pin_mask);
 752
 753         spin_unlock_irqrestore(&cpm1_gc->lock, flags);
 754
 755         return 0;
 756 }
 757
 758 int cpm1_gpiochip_add32(struct device_node *np)
 759 {
 760         struct cpm1_gpio32_chip *cpm1_gc;
 761         struct of_mm_gpio_chip *mm_gc;
 762         struct gpio_chip *gc;
 763
 764         cpm1_gc = kzalloc(sizeof(*cpm1_gc), GFP_KERNEL);
 765         if (!cpm1_gc)
 766                 return -ENOMEM;
 767
 768         spin_lock_init(&cpm1_gc->lock);
 769
 770         mm_gc = &cpm1_gc->mm_gc;
 771         gc = &mm_gc->gc;
 772
 773         mm_gc->save_regs = cpm1_gpio32_save_regs;
 774         gc->ngpio = 32;
 775         gc->direction_input = cpm1_gpio32_dir_in;
 776         gc->direction_output = cpm1_gpio32_dir_out;
 777         gc->get = cpm1_gpio32_get;
 778         gc->set = cpm1_gpio32_set;
 779
 780         return of_mm_gpiochip_add_data(np, mm_gc, cpm1_gc);
 781 }
 782
 783 static int cpm_init_par_io(void)
 784 {
 785         struct device_node *np;
 786
 787         for_each_compatible_node(np, NULL, "fsl,cpm1-pario-bank-a")
 788                 cpm1_gpiochip_add16(np);
 789
 790         for_each_compatible_node(np, NULL, "fsl,cpm1-pario-bank-b")
 791                 cpm1_gpiochip_add32(np);
 792
 793         for_each_compatible_node(np, NULL, "fsl,cpm1-pario-bank-c")
 794                 cpm1_gpiochip_add16(np);
 795
 796         for_each_compatible_node(np, NULL, "fsl,cpm1-pario-bank-d")
 797                 cpm1_gpiochip_add16(np);
 798
 799         /* Port E uses CPM2 layout */
 800         for_each_compatible_node(np, NULL, "fsl,cpm1-pario-bank-e")
 801                 cpm2_gpiochip_add32(np);
 802         return 0;
 803 }
 804 arch_initcall(cpm_init_par_io);
 805
 806 #endif /* CONFIG_8xx_GPIO */