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/h3xxx.h>
  48
  49 #include "generic.h"
  50
  51 struct gpio_default_state {
  52         int gpio;
  53         int mode;
  54         const char *name;
  55 };
  56
  57 #define GPIO_MODE_IN    -1
  58 #define GPIO_MODE_OUT0  0
  59 #define GPIO_MODE_OUT1  1
  60
  61 static void h3xxx_init_gpio(struct gpio_default_state *s, size_t n)
  62 {
  63         while (n--) {
  64                 const char *name = s->name;
  65                 int err;
  66
  67                 if (!name)
  68                         name = "[init]";
  69                 err = gpio_request(s->gpio, name);
  70                 if (err) {
  71                         printk(KERN_ERR "gpio%u: unable to request: %d\n",
  72                                 s->gpio, err);
  73                         continue;
  74                 }
  75                 if (s->mode >= 0) {
  76                         err = gpio_direction_output(s->gpio, s->mode);
  77                 } else {
  78                         err = gpio_direction_input(s->gpio);
  79                 }
  80                 if (err) {
  81                         printk(KERN_ERR "gpio%u: unable to set direction: %d\n",
  82                                 s->gpio, err);
  83                         continue;
  84                 }
  85                 if (!s->name)
  86                         gpio_free(s->gpio);
  87                 s++;
  88         }
  89 }
  90
  91
  92 /*
  93  * H3xxx flash support
  94  */
  95 static struct mtd_partition h3xxx_partitions[] = {
  96         {
  97                 .name           = "H3XXX boot firmware",
  98                 .size           = 0x00040000,
  99                 .offset         = 0,
 100                 .mask_flags     = MTD_WRITEABLE,  /* force read-only */
 101         }, {
 102                 .name           = "H3XXX rootfs",
 103                 .size           = MTDPART_SIZ_FULL,
 104                 .offset         = 0x00040000,
 105         }
 106 };
 107
 108 static void h3xxx_set_vpp(int vpp)
 109 {
 110         gpio_set_value(H3XXX_EGPIO_VPP_ON, vpp);
 111 }
 112
 113 static int h3xxx_flash_init(void)
 114 {
 115         int err = gpio_request(H3XXX_EGPIO_VPP_ON, "Flash Vpp");
 116         if (err)
 117                 return err;
 118
 119         err = gpio_direction_output(H3XXX_EGPIO_VPP_ON, 0);
 120         if (err)
 121                 gpio_free(H3XXX_EGPIO_VPP_ON);
 122
 123         return err;
 124 }
 125
 126 static void h3xxx_flash_exit(void)
 127 {
 128         gpio_free(H3XXX_EGPIO_VPP_ON);
 129 }
 130
 131 static struct flash_platform_data h3xxx_flash_data = {
 132         .map_name       = "cfi_probe",
 133         .set_vpp        = h3xxx_set_vpp,
 134         .init           = h3xxx_flash_init,
 135         .exit           = h3xxx_flash_exit,
 136         .parts          = h3xxx_partitions,
 137         .nr_parts       = ARRAY_SIZE(h3xxx_partitions),
 138 };
 139
 140 static struct resource h3xxx_flash_resource = {
 141         .start          = SA1100_CS0_PHYS,
 142         .end            = SA1100_CS0_PHYS + SZ_32M - 1,
 143         .flags          = IORESOURCE_MEM,
 144 };
 145
 146
 147 /*
 148  * H3xxx uart support
 149  */
 150 static void h3xxx_uart_set_mctrl(struct uart_port *port, u_int mctrl)
 151 {
 152         if (port->mapbase == _Ser3UTCR0) {
 153                 gpio_set_value(H3XXX_GPIO_COM_RTS, !(mctrl & TIOCM_RTS));
 154         }
 155 }
 156
 157 static u_int h3xxx_uart_get_mctrl(struct uart_port *port)
 158 {
 159         u_int ret = TIOCM_CD | TIOCM_CTS | TIOCM_DSR;
 160
 161         if (port->mapbase == _Ser3UTCR0) {
 162                 /*
 163                  * DCD and CTS bits are inverted in GPLR by RS232 transceiver
 164                  */
 165                 if (gpio_get_value(H3XXX_GPIO_COM_DCD))
 166                         ret &= ~TIOCM_CD;
 167                 if (gpio_get_value(H3XXX_GPIO_COM_CTS))
 168                         ret &= ~TIOCM_CTS;
 169         }
 170
 171         return ret;
 172 }
 173
 174 static void h3xxx_uart_pm(struct uart_port *port, u_int state, u_int oldstate)
 175 {
 176         if (port->mapbase == _Ser3UTCR0)
 177                 if (!gpio_request(H3XXX_EGPIO_RS232_ON, "RS232 transceiver")) {
 178                         gpio_direction_output(H3XXX_EGPIO_RS232_ON, !state);
 179                         gpio_free(H3XXX_EGPIO_RS232_ON);
 180                 }
 181 }
 182
 183 /*
 184  * Enable/Disable wake up events for this serial port.
 185  * Obviously, we only support this on the normal COM port.
 186  */
 187 static int h3xxx_uart_set_wake(struct uart_port *port, u_int enable)
 188 {
 189         int err = -EINVAL;
 190
 191         if (port->mapbase == _Ser3UTCR0) {
 192                 if (enable)
 193                         PWER |= PWER_GPIO23 | PWER_GPIO25; /* DCD and CTS */
 194                 else
 195                         PWER &= ~(PWER_GPIO23 | PWER_GPIO25); /* DCD and CTS */
 196                 err = 0;
 197         }
 198         return err;
 199 }
 200
 201 static struct sa1100_port_fns h3xxx_port_fns __initdata = {
 202         .set_mctrl      = h3xxx_uart_set_mctrl,
 203         .get_mctrl      = h3xxx_uart_get_mctrl,
 204         .pm             = h3xxx_uart_pm,
 205         .set_wake       = h3xxx_uart_set_wake,
 206 };
 207
 208 /*
 209  * EGPIO
 210  */
 211
 212 static struct resource egpio_resources[] = {
 213         [0] = {
 214                 .start  = H3600_EGPIO_PHYS,
 215                 .end    = H3600_EGPIO_PHYS + 0x4 - 1,
 216                 .flags  = IORESOURCE_MEM,
 217         },
 218 };
 219
 220 static struct htc_egpio_chip egpio_chips[] = {
 221         [0] = {
 222                 .reg_start      = 0,
 223                 .gpio_base      = H3XXX_EGPIO_BASE,
 224                 .num_gpios      = 16,
 225                 .direction      = HTC_EGPIO_OUTPUT,
 226                 .initial_values = 0x0080, /* H3XXX_EGPIO_RS232_ON */
 227         },
 228 };
 229
 230 static struct htc_egpio_platform_data egpio_info = {
 231         .reg_width      = 16,
 232         .bus_width      = 16,
 233         .chip           = egpio_chips,
 234         .num_chips      = ARRAY_SIZE(egpio_chips),
 235 };
 236
 237 static struct platform_device h3xxx_egpio = {
 238         .name           = "htc-egpio",
 239         .id             = -1,
 240         .resource       = egpio_resources,
 241         .num_resources  = ARRAY_SIZE(egpio_resources),
 242         .dev            = {
 243                 .platform_data = &egpio_info,
 244         },
 245 };
 246
 247 static struct platform_device *h3xxx_devices[] = {
 248         &h3xxx_egpio,
 249 };
 250
 251 static void __init h3xxx_mach_init(void)
 252 {
 253         sa1100_register_uart_fns(&h3xxx_port_fns);
 254         sa11x0_register_mtd(&h3xxx_flash_data, &h3xxx_flash_resource, 1);
 255         platform_add_devices(h3xxx_devices, ARRAY_SIZE(h3xxx_devices));
 256 }
 257
 258 static struct map_desc h3600_io_desc[] __initdata = {
 259         {       /* static memory bank 2  CS#2 */
 260                 .virtual        =  H3600_BANK_2_VIRT,
 261                 .pfn            = __phys_to_pfn(SA1100_CS2_PHYS),
 262                 .length         = 0x02800000,
 263                 .type           = MT_DEVICE
 264         }, {    /* static memory bank 4  CS#4 */
 265                 .virtual        =  H3600_BANK_4_VIRT,
 266                 .pfn            = __phys_to_pfn(SA1100_CS4_PHYS),
 267                 .length         = 0x00800000,
 268                 .type           = MT_DEVICE
 269         }, {    /* EGPIO 0              CS#5 */
 270                 .virtual        =  H3600_EGPIO_VIRT,
 271                 .pfn            = __phys_to_pfn(H3600_EGPIO_PHYS),
 272                 .length         = 0x01000000,
 273                 .type           = MT_DEVICE
 274         }
 275 };
 276
 277 /*
 278  * Common map_io initialization
 279  */
 280
 281 static void __init h3xxx_map_io(void)
 282 {
 283         sa1100_map_io();
 284         iotable_init(h3600_io_desc, ARRAY_SIZE(h3600_io_desc));
 285
 286         sa1100_register_uart(0, 3); /* Common serial port */
 287 //      sa1100_register_uart(1, 1); /* Microcontroller on 3100/3600 */
 288
 289         /* Ensure those pins are outputs and driving low  */
 290         PPDR |= PPC_TXD4 | PPC_SCLK | PPC_SFRM;
 291         PPSR &= ~(PPC_TXD4 | PPC_SCLK | PPC_SFRM);
 292
 293         /* Configure suspend conditions */
 294         PGSR = 0;
 295         PWER = PWER_GPIO0;
 296         PCFR = PCFR_OPDE;
 297         PSDR = 0;
 298
 299         GPCR = 0x0fffffff;      /* All outputs are set low by default */
 300         GPDR = 0;               /* Configure all GPIOs as input */
 301 }
 302
 303 /************************* H3100 *************************/
 304
 305 #ifdef CONFIG_SA1100_H3100
 306
 307 /*
 308  * helper for sa1100fb
 309  */
 310 static void h3100_lcd_power(int enable)
 311 {
 312         if (!gpio_request(H3XXX_EGPIO_LCD_ON, "LCD ON")) {
 313                 gpio_set_value(H3100_GPIO_LCD_3V_ON, enable);
 314                 gpio_direction_output(H3XXX_EGPIO_LCD_ON, enable);
 315                 gpio_free(H3XXX_EGPIO_LCD_ON);
 316         }
 317 }
 318
 319
 320 static void __init h3100_map_io(void)
 321 {
 322         h3xxx_map_io();
 323
 324         sa1100fb_lcd_power = h3100_lcd_power;
 325
 326         /* Older bootldrs put GPIO2-9 in alternate mode on the
 327            assumption that they are used for video */
 328         GAFR &= ~0x000001fb;
 329 }
 330
 331 /*
 332  * This turns the IRDA power on or off on the Compaq H3100
 333  */
 334 static int h3100_irda_set_power(struct device *dev, unsigned int state)
 335 {
 336         gpio_set_value(H3100_GPIO_IR_ON, state);
 337         return 0;
 338 }
 339
 340 static void h3100_irda_set_speed(struct device *dev, unsigned int speed)
 341 {
 342         gpio_set_value(H3100_GPIO_IR_FSEL, !(speed < 4000000));
 343 }
 344
 345 static struct irda_platform_data h3100_irda_data = {
 346         .set_power      = h3100_irda_set_power,
 347         .set_speed      = h3100_irda_set_speed,
 348 };
 349
 350 static struct gpio_default_state h3100_default_gpio[] = {
 351         { H3100_GPIO_IR_ON,     GPIO_MODE_OUT0, "IrDA power" },
 352         { H3100_GPIO_IR_FSEL,   GPIO_MODE_OUT0, "IrDA fsel" },
 353         { H3XXX_GPIO_COM_DCD,   GPIO_MODE_IN,   "COM DCD" },
 354         { H3XXX_GPIO_COM_CTS,   GPIO_MODE_IN,   "COM CTS" },
 355         { H3XXX_GPIO_COM_RTS,   GPIO_MODE_OUT0, "COM RTS" },
 356         { H3100_GPIO_LCD_3V_ON, GPIO_MODE_OUT0, "LCD 3v" },
 357 };
 358
 359 static void __init h3100_mach_init(void)
 360 {
 361         h3xxx_init_gpio(h3100_default_gpio, ARRAY_SIZE(h3100_default_gpio));
 362         h3xxx_mach_init();
 363         sa11x0_register_irda(&h3100_irda_data);
 364 }
 365
 366 MACHINE_START(H3100, "Compaq iPAQ H3100")
 367         .phys_io        = 0x80000000,
 368         .io_pg_offst    = ((0xf8000000) >> 18) & 0xfffc,
 369         .boot_params    = 0xc0000100,
 370         .map_io         = h3100_map_io,
 371         .init_irq       = sa1100_init_irq,
 372         .timer          = &sa1100_timer,
 373         .init_machine   = h3100_mach_init,
 374 MACHINE_END
 375
 376 #endif /* CONFIG_SA1100_H3100 */
 377
 378 /************************* H3600 *************************/
 379
 380 #ifdef CONFIG_SA1100_H3600
 381
 382 /*
 383  * helper for sa1100fb
 384  */
 385 static void h3600_lcd_power(int enable)
 386 {
 387         if (gpio_request(H3XXX_EGPIO_LCD_ON, "LCD power"))
 388                 goto err1;
 389         if (gpio_request(H3600_EGPIO_LCD_PCI, "LCD control"))
 390                 goto err2;
 391         if (gpio_request(H3600_EGPIO_LCD_5V_ON, "LCD 5v"))
 392                 goto err3;
 393         if (gpio_request(H3600_EGPIO_LVDD_ON, "LCD 9v/-6.5v"))
 394                 goto err4;
 395
 396         gpio_direction_output(H3XXX_EGPIO_LCD_ON, enable);
 397         gpio_direction_output(H3600_EGPIO_LCD_PCI, enable);
 398         gpio_direction_output(H3600_EGPIO_LCD_5V_ON, enable);
 399         gpio_direction_output(H3600_EGPIO_LVDD_ON, enable);
 400
 401         gpio_free(H3600_EGPIO_LVDD_ON);
 402 err4:   gpio_free(H3600_EGPIO_LCD_5V_ON);
 403 err3:   gpio_free(H3600_EGPIO_LCD_PCI);
 404 err2:   gpio_free(H3XXX_EGPIO_LCD_ON);
 405 err1:   return;
 406 }
 407
 408 static void __init h3600_map_io(void)
 409 {
 410         h3xxx_map_io();
 411
 412         sa1100fb_lcd_power = h3600_lcd_power;
 413 }
 414
 415 /*
 416  * This turns the IRDA power on or off on the Compaq H3600
 417  */
 418 static int h3600_irda_set_power(struct device *dev, unsigned int state)
 419 {
 420         gpio_set_value(H3600_EGPIO_IR_ON, state);
 421         return 0;
 422 }
 423
 424 static void h3600_irda_set_speed(struct device *dev, unsigned int speed)
 425 {
 426         gpio_set_value(H3600_EGPIO_IR_FSEL, !(speed < 4000000));
 427 }
 428
 429 static int h3600_irda_startup(struct device *dev)
 430 {
 431         int err = gpio_request(H3600_EGPIO_IR_ON, "IrDA power");
 432         if (err)
 433                 goto err1;
 434         err = gpio_direction_output(H3600_EGPIO_IR_ON, 0);
 435         if (err)
 436                 goto err2;
 437         err = gpio_request(H3600_EGPIO_IR_FSEL, "IrDA fsel");
 438         if (err)
 439                 goto err2;
 440         err = gpio_direction_output(H3600_EGPIO_IR_FSEL, 0);
 441         if (err)
 442                 goto err3;
 443         return 0;
 444
 445 err3:   gpio_free(H3600_EGPIO_IR_FSEL);
 446 err2:   gpio_free(H3600_EGPIO_IR_ON);
 447 err1:   return err;
 448 }
 449
 450 static void h3600_irda_shutdown(struct device *dev)
 451 {
 452         gpio_free(H3600_EGPIO_IR_ON);
 453         gpio_free(H3600_EGPIO_IR_FSEL);
 454 }
 455
 456 static struct irda_platform_data h3600_irda_data = {
 457         .set_power      = h3600_irda_set_power,
 458         .set_speed      = h3600_irda_set_speed,
 459         .startup        = h3600_irda_startup,
 460         .shutdown       = h3600_irda_shutdown,
 461 };
 462
 463 static struct gpio_default_state h3600_default_gpio[] = {
 464         { H3XXX_GPIO_COM_DCD,   GPIO_MODE_IN,   "COM DCD" },
 465         { H3XXX_GPIO_COM_CTS,   GPIO_MODE_IN,   "COM CTS" },
 466         { H3XXX_GPIO_COM_RTS,   GPIO_MODE_OUT0, "COM RTS" },
 467 };
 468
 469 static void __init h3600_mach_init(void)
 470 {
 471         h3xxx_init_gpio(h3600_default_gpio, ARRAY_SIZE(h3600_default_gpio));
 472         h3xxx_mach_init();
 473         sa11x0_register_irda(&h3600_irda_data);
 474 }
 475
 476 MACHINE_START(H3600, "Compaq iPAQ H3600")
 477         .phys_io        = 0x80000000,
 478         .io_pg_offst    = ((0xf8000000) >> 18) & 0xfffc,
 479         .boot_params    = 0xc0000100,
 480         .map_io         = h3600_map_io,
 481         .init_irq       = sa1100_init_irq,
 482         .timer          = &sa1100_timer,
 483         .init_machine   = h3600_mach_init,
 484 MACHINE_END
 485
 486 #endif /* CONFIG_SA1100_H3600 */
 487