arch/arm/mach-sa1100/h3600.c

   1 /*
   2  * Hardware definitions for Compaq iPAQ H3xxx Handheld Computers
   3  *
   4  * Copyright 2000,1 Compaq Computer Corporation.
   5  *
   6  * Use consistent with the GNU GPL is permitted,
   7  * provided that this copyright notice is
   8  * preserved in its entirety in all copies and derived works.
   9  *
  10  * COMPAQ COMPUTER CORPORATION MAKES NO WARRANTIES, EXPRESSED OR IMPLIED,
  11  * AS TO THE USEFULNESS OR CORRECTNESS OF THIS CODE OR ITS
  12  * FITNESS FOR ANY PARTICULAR PURPOSE.
  13  *
  14  * Author: Jamey Hicks.
  15  *
  16  * History:
  17  *
  18  * 2001-10-??   Andrew Christian   Added support for iPAQ H3800
  19  *                                 and abstracted EGPIO interface.
  20  *
  21  */
  22 #include <linux/module.h>
  23 #include <linux/init.h>
  24 #include <linux/kernel.h>
  25 #include <linux/tty.h>
  26 #include <linux/pm.h>
  27 #include <linux/device.h>
  28 #include <linux/mfd/htc-egpio.h>
  29 #include <linux/mtd/mtd.h>
  30 #include <linux/mtd/partitions.h>
  31 #include <linux/serial_core.h>
  32 #include <linux/gpio.h>
  33 #include <linux/platform_device.h>
  34
  35 #include <asm/irq.h>
  36 #include <mach/hardware.h>
  37 #include <asm/mach-types.h>
  38 #include <asm/setup.h>
  39
  40 #include <asm/mach/irq.h>
  41 #include <asm/mach/arch.h>
  42 #include <asm/mach/flash.h>
  43 #include <asm/mach/irda.h>
  44 #include <asm/mach/map.h>
  45 #include <asm/mach/serial_sa1100.h>
  46
  47 #include <mach/h3600.h>
  48 #include <mach/h3600_gpio.h>
  49
  50 #include "generic.h"
  51
  52 struct gpio_default_state {
  53         int gpio;
  54         int mode;
  55         const char *name;
  56 };
  57
  58 #define GPIO_MODE_IN    -1
  59 #define GPIO_MODE_OUT0  0
  60 #define GPIO_MODE_OUT1  1
  61
  62 static void h3xxx_init_gpio(struct gpio_default_state *s, size_t n)
  63 {
  64         while (n--) {
  65                 const char *name = s->name;
  66                 int err;
  67
  68                 if (!name)
  69                         name = "[init]";
  70                 err = gpio_request(s->gpio, name);
  71                 if (err) {
  72                         printk(KERN_ERR "gpio%u: unable to request: %d\n",
  73                                 s->gpio, err);
  74                         continue;
  75                 }
  76                 if (s->mode >= 0) {
  77                         err = gpio_direction_output(s->gpio, s->mode);
  78                 } else {
  79                         err = gpio_direction_input(s->gpio);
  80                 }
  81                 if (err) {
  82                         printk(KERN_ERR "gpio%u: unable to set direction: %d\n",
  83                                 s->gpio, err);
  84                         continue;
  85                 }
  86                 if (!s->name)
  87                         gpio_free(s->gpio);
  88                 s++;
  89         }
  90 }
  91
  92
  93 /*
  94  * H3xxx flash support
  95  */
  96 static struct mtd_partition h3xxx_partitions[] = {
  97         {
  98                 .name           = "H3XXX boot firmware",
  99                 .size           = 0x00040000,
 100                 .offset         = 0,
 101                 .mask_flags     = MTD_WRITEABLE,  /* force read-only */
 102         }, {
 103                 .name           = "H3XXX rootfs",
 104                 .size           = MTDPART_SIZ_FULL,
 105                 .offset         = 0x00040000,
 106         }
 107 };
 108
 109 static void h3xxx_set_vpp(int vpp)
 110 {
 111         gpio_set_value(H3XXX_EGPIO_VPP_ON, vpp);
 112 }
 113
 114 static int h3xxx_flash_init(void)
 115 {
 116         int err = gpio_request(H3XXX_EGPIO_VPP_ON, "Flash Vpp");
 117         if (err)
 118                 return err;
 119
 120         err = gpio_direction_output(H3XXX_EGPIO_VPP_ON, 0);
 121         if (err)
 122                 gpio_free(H3XXX_EGPIO_VPP_ON);
 123
 124         return err;
 125 }
 126
 127 static void h3xxx_flash_exit(void)
 128 {
 129         gpio_free(H3XXX_EGPIO_VPP_ON);
 130 }
 131
 132 static struct flash_platform_data h3xxx_flash_data = {
 133         .map_name       = "cfi_probe",
 134         .set_vpp        = h3xxx_set_vpp,
 135         .init           = h3xxx_flash_init,
 136         .exit           = h3xxx_flash_exit,
 137         .parts          = h3xxx_partitions,
 138         .nr_parts       = ARRAY_SIZE(h3xxx_partitions),
 139 };
 140
 141 static struct resource h3xxx_flash_resource = {
 142         .start          = SA1100_CS0_PHYS,
 143         .end            = SA1100_CS0_PHYS + SZ_32M - 1,
 144         .flags          = IORESOURCE_MEM,
 145 };
 146
 147
 148 /*
 149  * H3xxx uart support
 150  */
 151 static void h3xxx_uart_set_mctrl(struct uart_port *port, u_int mctrl)
 152 {
 153         if (port->mapbase == _Ser3UTCR0) {
 154                 gpio_set_value(H3XXX_GPIO_COM_RTS, !(mctrl & TIOCM_RTS));
 155         }
 156 }
 157
 158 static u_int h3xxx_uart_get_mctrl(struct uart_port *port)
 159 {
 160         u_int ret = TIOCM_CD | TIOCM_CTS | TIOCM_DSR;
 161
 162         if (port->mapbase == _Ser3UTCR0) {
 163                 /*
 164                  * DCD and CTS bits are inverted in GPLR by RS232 transceiver
 165                  */
 166                 if (gpio_get_value(H3XXX_GPIO_COM_DCD))
 167                         ret &= ~TIOCM_CD;
 168                 if (gpio_get_value(H3XXX_GPIO_COM_CTS))
 169                         ret &= ~TIOCM_CTS;
 170         }
 171
 172         return ret;
 173 }
 174
 175 static void h3xxx_uart_pm(struct uart_port *port, u_int state, u_int oldstate)
 176 {
 177         if (port->mapbase == _Ser3UTCR0)
 178                 if (!gpio_request(H3XXX_EGPIO_RS232_ON, "RS232 transceiver")) {
 179                         gpio_direction_output(H3XXX_EGPIO_RS232_ON, !state);
 180                         gpio_free(H3XXX_EGPIO_RS232_ON);
 181                 }
 182 }
 183
 184 /*
 185  * Enable/Disable wake up events for this serial port.
 186  * Obviously, we only support this on the normal COM port.
 187  */
 188 static int h3xxx_uart_set_wake(struct uart_port *port, u_int enable)
 189 {
 190         int err = -EINVAL;
 191
 192         if (port->mapbase == _Ser3UTCR0) {
 193                 if (enable)
 194                         PWER |= PWER_GPIO23 | PWER_GPIO25; /* DCD and CTS */
 195                 else
 196                         PWER &= ~(PWER_GPIO23 | PWER_GPIO25); /* DCD and CTS */
 197                 err = 0;
 198         }
 199         return err;
 200 }
 201
 202 static struct sa1100_port_fns h3xxx_port_fns __initdata = {
 203         .set_mctrl      = h3xxx_uart_set_mctrl,
 204         .get_mctrl      = h3xxx_uart_get_mctrl,
 205         .pm             = h3xxx_uart_pm,
 206         .set_wake       = h3xxx_uart_set_wake,
 207 };
 208
 209 /*
 210  * EGPIO
 211  */
 212
 213 static struct resource egpio_resources[] = {
 214         [0] = {
 215                 .start  = H3600_EGPIO_PHYS,
 216                 .end    = H3600_EGPIO_PHYS + 0x4 - 1,
 217                 .flags  = IORESOURCE_MEM,
 218         },
 219 };
 220
 221 static struct htc_egpio_chip egpio_chips[] = {
 222         [0] = {
 223                 .reg_start      = 0,
 224                 .gpio_base      = H3XXX_EGPIO_BASE,
 225                 .num_gpios      = 16,
 226                 .direction      = HTC_EGPIO_OUTPUT,
 227                 .initial_values = 0x0080, /* H3XXX_EGPIO_RS232_ON */
 228         },
 229 };
 230
 231 static struct htc_egpio_platform_data egpio_info = {
 232         .reg_width      = 16,
 233         .bus_width      = 16,
 234         .chip           = egpio_chips,
 235         .num_chips      = ARRAY_SIZE(egpio_chips),
 236 };
 237
 238 static struct platform_device h3xxx_egpio = {
 239         .name           = "htc-egpio",
 240         .id             = -1,
 241         .resource       = egpio_resources,
 242         .num_resources  = ARRAY_SIZE(egpio_resources),
 243         .dev            = {
 244                 .platform_data = &egpio_info,
 245         },
 246 };
 247
 248 static struct platform_device *h3xxx_devices[] = {
 249         &h3xxx_egpio,
 250 };
 251
 252 static void __init h3xxx_mach_init(void)
 253 {
 254         sa1100_register_uart_fns(&h3xxx_port_fns);
 255         sa11x0_register_mtd(&h3xxx_flash_data, &h3xxx_flash_resource, 1);
 256         platform_add_devices(h3xxx_devices, ARRAY_SIZE(h3xxx_devices));
 257 }
 258
 259 static struct map_desc h3600_io_desc[] __initdata = {
 260         {       /* static memory bank 2  CS#2 */
 261                 .virtual        =  H3600_BANK_2_VIRT,
 262                 .pfn            = __phys_to_pfn(SA1100_CS2_PHYS),
 263                 .length         = 0x02800000,
 264                 .type           = MT_DEVICE
 265         }, {    /* static memory bank 4  CS#4 */
 266                 .virtual        =  H3600_BANK_4_VIRT,
 267                 .pfn            = __phys_to_pfn(SA1100_CS4_PHYS),
 268                 .length         = 0x00800000,
 269                 .type           = MT_DEVICE
 270         }, {    /* EGPIO 0              CS#5 */
 271                 .virtual        =  H3600_EGPIO_VIRT,
 272                 .pfn            = __phys_to_pfn(H3600_EGPIO_PHYS),
 273                 .length         = 0x01000000,
 274                 .type           = MT_DEVICE
 275         }
 276 };
 277
 278 /*
 279  * Common map_io initialization
 280  */
 281
 282 static void __init h3xxx_map_io(void)
 283 {
 284         sa1100_map_io();
 285         iotable_init(h3600_io_desc, ARRAY_SIZE(h3600_io_desc));
 286
 287         sa1100_register_uart(0, 3); /* Common serial port */
 288 //      sa1100_register_uart(1, 1); /* Microcontroller on 3100/3600 */
 289
 290         /* Ensure those pins are outputs and driving low  */
 291         PPDR |= PPC_TXD4 | PPC_SCLK | PPC_SFRM;
 292         PPSR &= ~(PPC_TXD4 | PPC_SCLK | PPC_SFRM);
 293
 294         /* Configure suspend conditions */
 295         PGSR = 0;
 296         PWER = PWER_GPIO0;
 297         PCFR = PCFR_OPDE;
 298         PSDR = 0;
 299
 300 }
 301
 302 /************************* H3100 *************************/
 303
 304 #ifdef CONFIG_SA1100_H3100
 305
 306 #define H3100_DIRECT_EGPIO (GPIO_H3100_BT_ON      \
 307                           | GPIO_H3100_GPIO3      \
 308                           | GPIO_H3100_QMUTE      \
 309                           | GPIO_H3100_LCD_3V_ON  \
 310                           | GPIO_H3100_AUD_ON     \
 311                           | GPIO_H3100_AUD_PWR_ON \
 312                           | GPIO_H3100_IR_ON      \
 313                           | GPIO_H3100_IR_FSEL)
 314 /*
 315  * helper for sa1100fb
 316  */
 317 static void h3100_lcd_power(int enable)
 318 {
 319         if (!gpio_request(H3XXX_EGPIO_LCD_ON, "LCD ON")) {
 320                 gpio_set_value(H3100_GPIO_LCD_3V_ON, enable);
 321                 gpio_direction_output(H3XXX_EGPIO_LCD_ON, enable);
 322                 gpio_free(H3XXX_EGPIO_LCD_ON);
 323         }
 324 }
 325
 326
 327 static void __init h3100_map_io(void)
 328 {
 329         h3xxx_map_io();
 330
 331         sa1100fb_lcd_power = h3100_lcd_power;
 332
 333         /* Initialize h3100-specific values here */
 334         GPCR = 0x0fffffff;       /* All outputs are set low by default */
 335         GPDR = GPIO_H3600_L3_CLOCK |
 336                GPIO_H3600_L3_MODE  | GPIO_H3600_L3_DATA  |
 337                GPIO_H3600_CLK_SET1 | GPIO_H3600_CLK_SET0 |
 338                H3100_DIRECT_EGPIO;
 339
 340         /* Older bootldrs put GPIO2-9 in alternate mode on the
 341            assumption that they are used for video */
 342         GAFR &= ~H3100_DIRECT_EGPIO;
 343 }
 344
 345 /*
 346  * This turns the IRDA power on or off on the Compaq H3100
 347  */
 348 static int h3100_irda_set_power(struct device *dev, unsigned int state)
 349 {
 350         gpio_set_value(H3100_GPIO_IR_ON, state);
 351         return 0;
 352 }
 353
 354 static void h3100_irda_set_speed(struct device *dev, unsigned int speed)
 355 {
 356         gpio_set_value(H3100_GPIO_IR_FSEL, !(speed < 4000000));
 357 }
 358
 359 static struct irda_platform_data h3100_irda_data = {
 360         .set_power      = h3100_irda_set_power,
 361         .set_speed      = h3100_irda_set_speed,
 362 };
 363
 364 static struct gpio_default_state h3100_default_gpio[] = {
 365         { H3100_GPIO_IR_ON,     GPIO_MODE_OUT0, "IrDA power" },
 366         { H3100_GPIO_IR_FSEL,   GPIO_MODE_OUT0, "IrDA fsel" },
 367         { H3XXX_GPIO_COM_DCD,   GPIO_MODE_IN,   "COM DCD" },
 368         { H3XXX_GPIO_COM_CTS,   GPIO_MODE_IN,   "COM CTS" },
 369         { H3XXX_GPIO_COM_RTS,   GPIO_MODE_OUT0, "COM RTS" },
 370         { H3100_GPIO_LCD_3V_ON, GPIO_MODE_OUT0, "LCD 3v" },
 371 };
 372
 373 static void __init h3100_mach_init(void)
 374 {
 375         h3xxx_init_gpio(h3100_default_gpio, ARRAY_SIZE(h3100_default_gpio));
 376         h3xxx_mach_init();
 377         sa11x0_register_irda(&h3100_irda_data);
 378 }
 379
 380 MACHINE_START(H3100, "Compaq iPAQ H3100")
 381         .phys_io        = 0x80000000,
 382         .io_pg_offst    = ((0xf8000000) >> 18) & 0xfffc,
 383         .boot_params    = 0xc0000100,
 384         .map_io         = h3100_map_io,
 385         .init_irq       = sa1100_init_irq,
 386         .timer          = &sa1100_timer,
 387         .init_machine   = h3100_mach_init,
 388 MACHINE_END
 389
 390 #endif /* CONFIG_SA1100_H3100 */
 391
 392 /************************* H3600 *************************/
 393
 394 #ifdef CONFIG_SA1100_H3600
 395
 396 /*
 397  * helper for sa1100fb
 398  */
 399 static void h3600_lcd_power(int enable)
 400 {
 401         if (gpio_request(H3XXX_EGPIO_LCD_ON, "LCD power"))
 402                 goto err1;
 403         if (gpio_request(H3600_EGPIO_LCD_PCI, "LCD control"))
 404                 goto err2;
 405         if (gpio_request(H3600_EGPIO_LCD_5V_ON, "LCD 5v"))
 406                 goto err3;
 407         if (gpio_request(H3600_EGPIO_LVDD_ON, "LCD 9v/-6.5v"))
 408                 goto err4;
 409
 410         gpio_direction_output(H3XXX_EGPIO_LCD_ON, enable);
 411         gpio_direction_output(H3600_EGPIO_LCD_PCI, enable);
 412         gpio_direction_output(H3600_EGPIO_LCD_5V_ON, enable);
 413         gpio_direction_output(H3600_EGPIO_LVDD_ON, enable);
 414
 415         gpio_free(H3600_EGPIO_LVDD_ON);
 416 err4:   gpio_free(H3600_EGPIO_LCD_5V_ON);
 417 err3:   gpio_free(H3600_EGPIO_LCD_PCI);
 418 err2:   gpio_free(H3XXX_EGPIO_LCD_ON);
 419 err1:   return;
 420 }
 421
 422 static void __init h3600_map_io(void)
 423 {
 424         h3xxx_map_io();
 425
 426         sa1100fb_lcd_power = h3600_lcd_power;
 427
 428         /* Initialize h3600-specific values here */
 429
 430         GPCR = 0x0fffffff;       /* All outputs are set low by default */
 431         GPDR = GPIO_H3600_L3_CLOCK |
 432                GPIO_H3600_L3_MODE  | GPIO_H3600_L3_DATA  |
 433                GPIO_H3600_CLK_SET1 | GPIO_H3600_CLK_SET0;
 434 }
 435
 436 /*
 437  * This turns the IRDA power on or off on the Compaq H3600
 438  */
 439 static int h3600_irda_set_power(struct device *dev, unsigned int state)
 440 {
 441         gpio_set_value(H3600_EGPIO_IR_ON, state);
 442         return 0;
 443 }
 444
 445 static void h3600_irda_set_speed(struct device *dev, unsigned int speed)
 446 {
 447         gpio_set_value(H3600_EGPIO_IR_FSEL, !(speed < 4000000));
 448 }
 449
 450 static int h3600_irda_startup(struct device *dev)
 451 {
 452         int err = gpio_request(H3600_EGPIO_IR_ON, "IrDA power");
 453         if (err)
 454                 goto err1;
 455         err = gpio_direction_output(H3600_EGPIO_IR_ON, 0);
 456         if (err)
 457                 goto err2;
 458         err = gpio_request(H3600_EGPIO_IR_FSEL, "IrDA fsel");
 459         if (err)
 460                 goto err2;
 461         err = gpio_direction_output(H3600_EGPIO_IR_FSEL, 0);
 462         if (err)
 463                 goto err3;
 464         return 0;
 465
 466 err3:   gpio_free(H3600_EGPIO_IR_FSEL);
 467 err2:   gpio_free(H3600_EGPIO_IR_ON);
 468 err1:   return err;
 469 }
 470
 471 static void h3600_irda_shutdown(struct device *dev)
 472 {
 473         gpio_free(H3600_EGPIO_IR_ON);
 474         gpio_free(H3600_EGPIO_IR_FSEL);
 475 }
 476
 477 static struct irda_platform_data h3600_irda_data = {
 478         .set_power      = h3600_irda_set_power,
 479         .set_speed      = h3600_irda_set_speed,
 480         .startup        = h3600_irda_startup,
 481         .shutdown       = h3600_irda_shutdown,
 482 };
 483
 484 static struct gpio_default_state h3600_default_gpio[] = {
 485         { H3XXX_GPIO_COM_DCD,   GPIO_MODE_IN,   "COM DCD" },
 486         { H3XXX_GPIO_COM_CTS,   GPIO_MODE_IN,   "COM CTS" },
 487         { H3XXX_GPIO_COM_RTS,   GPIO_MODE_OUT0, "COM RTS" },
 488 };
 489
 490 static void __init h3600_mach_init(void)
 491 {
 492         h3xxx_init_gpio(h3600_default_gpio, ARRAY_SIZE(h3600_default_gpio));
 493         h3xxx_mach_init();
 494         sa11x0_register_irda(&h3600_irda_data);
 495 }
 496
 497 MACHINE_START(H3600, "Compaq iPAQ H3600")
 498         .phys_io        = 0x80000000,
 499         .io_pg_offst    = ((0xf8000000) >> 18) & 0xfffc,
 500         .boot_params    = 0xc0000100,
 501         .map_io         = h3600_map_io,
 502         .init_irq       = sa1100_init_irq,
 503         .timer          = &sa1100_timer,
 504         .init_machine   = h3600_mach_init,
 505 MACHINE_END
 506
 507 #endif /* CONFIG_SA1100_H3600 */
 508