release/src-rt-6.x.4708/linux/linux-2.6.36/arch/arm/mach-sa1100/h3xxx.c

   1 /*
   2  * Support for Compaq iPAQ H3100 and H3600 handheld computers (common code)
   3  *
   4  * Copyright (c) 2000,1 Compaq Computer Corporation. (Author: Jamey Hicks)
   5  * Copyright (c) 2009 Dmitry Artamonow <mad_soft@inbox.ru>
   6  *
   7  * This program is free software; you can redistribute it and/or modify
   8  * it under the terms of the GNU General Public License version 2 as
   9  * published by the Free Software Foundation.
  10  *
  11  */
  12
  13 #include <linux/kernel.h>
  14 #include <linux/gpio.h>
  15 #include <linux/gpio_keys.h>
  16 #include <linux/input.h>
  17 #include <linux/mfd/htc-egpio.h>
  18 #include <linux/mtd/mtd.h>
  19 #include <linux/mtd/partitions.h>
  20 #include <linux/platform_device.h>
  21 #include <linux/serial_core.h>
  22
  23 #include <asm/mach/flash.h>
  24 #include <asm/mach/map.h>
  25 #include <asm/mach/serial_sa1100.h>
  26
  27 #include <mach/h3xxx.h>
  28
  29 #include "generic.h"
  30
  31 void h3xxx_init_gpio(struct gpio_default_state *s, size_t n)
  32 {
  33         while (n--) {
  34                 const char *name = s->name;
  35                 int err;
  36
  37                 if (!name)
  38                         name = "[init]";
  39                 err = gpio_request(s->gpio, name);
  40                 if (err) {
  41                         printk(KERN_ERR "gpio%u: unable to request: %d\n",
  42                                 s->gpio, err);
  43                         continue;
  44                 }
  45                 if (s->mode >= 0) {
  46                         err = gpio_direction_output(s->gpio, s->mode);
  47                 } else {
  48                         err = gpio_direction_input(s->gpio);
  49                 }
  50                 if (err) {
  51                         printk(KERN_ERR "gpio%u: unable to set direction: %d\n",
  52                                 s->gpio, err);
  53                         continue;
  54                 }
  55                 if (!s->name)
  56                         gpio_free(s->gpio);
  57                 s++;
  58         }
  59 }
  60
  61
  62 /*
  63  * H3xxx flash support
  64  */
  65 static struct mtd_partition h3xxx_partitions[] = {
  66         {
  67                 .name           = "H3XXX boot firmware",
  68                 .size           = 0x00040000,
  69                 .offset         = 0,
  70                 .mask_flags     = MTD_WRITEABLE,  /* force read-only */
  71         }, {
  72                 .name           = "H3XXX rootfs",
  73                 .size           = MTDPART_SIZ_FULL,
  74                 .offset         = 0x00040000,
  75         }
  76 };
  77
  78 static void h3xxx_set_vpp(int vpp)
  79 {
  80         gpio_set_value(H3XXX_EGPIO_VPP_ON, vpp);
  81 }
  82
  83 static int h3xxx_flash_init(void)
  84 {
  85         int err = gpio_request(H3XXX_EGPIO_VPP_ON, "Flash Vpp");
  86         if (err) {
  87                 pr_err("%s: can't request H3XXX_EGPIO_VPP_ON\n", __func__);
  88                 return err;
  89         }
  90
  91         err = gpio_direction_output(H3XXX_EGPIO_VPP_ON, 0);
  92         if (err)
  93                 gpio_free(H3XXX_EGPIO_VPP_ON);
  94
  95         return err;
  96 }
  97
  98 static void h3xxx_flash_exit(void)
  99 {
 100         gpio_free(H3XXX_EGPIO_VPP_ON);
 101 }
 102
 103 static struct flash_platform_data h3xxx_flash_data = {
 104         .map_name       = "cfi_probe",
 105         .set_vpp        = h3xxx_set_vpp,
 106         .init           = h3xxx_flash_init,
 107         .exit           = h3xxx_flash_exit,
 108         .parts          = h3xxx_partitions,
 109         .nr_parts       = ARRAY_SIZE(h3xxx_partitions),
 110 };
 111
 112 static struct resource h3xxx_flash_resource = {
 113         .start          = SA1100_CS0_PHYS,
 114         .end            = SA1100_CS0_PHYS + SZ_32M - 1,
 115         .flags          = IORESOURCE_MEM,
 116 };
 117
 118
 119 /*
 120  * H3xxx uart support
 121  */
 122 static void h3xxx_uart_set_mctrl(struct uart_port *port, u_int mctrl)
 123 {
 124         if (port->mapbase == _Ser3UTCR0) {
 125                 gpio_set_value(H3XXX_GPIO_COM_RTS, !(mctrl & TIOCM_RTS));
 126         }
 127 }
 128
 129 static u_int h3xxx_uart_get_mctrl(struct uart_port *port)
 130 {
 131         u_int ret = TIOCM_CD | TIOCM_CTS | TIOCM_DSR;
 132
 133         if (port->mapbase == _Ser3UTCR0) {
 134                 /*
 135                  * DCD and CTS bits are inverted in GPLR by RS232 transceiver
 136                  */
 137                 if (gpio_get_value(H3XXX_GPIO_COM_DCD))
 138                         ret &= ~TIOCM_CD;
 139                 if (gpio_get_value(H3XXX_GPIO_COM_CTS))
 140                         ret &= ~TIOCM_CTS;
 141         }
 142
 143         return ret;
 144 }
 145
 146 static void h3xxx_uart_pm(struct uart_port *port, u_int state, u_int oldstate)
 147 {
 148         if (port->mapbase == _Ser3UTCR0) {
 149                 if (!gpio_request(H3XXX_EGPIO_RS232_ON, "RS232 transceiver")) {
 150                         gpio_direction_output(H3XXX_EGPIO_RS232_ON, !state);
 151                         gpio_free(H3XXX_EGPIO_RS232_ON);
 152                 } else {
 153                         pr_err("%s: can't request H3XXX_EGPIO_RS232_ON\n",
 154                                 __func__);
 155                 }
 156         }
 157 }
 158
 159 /*
 160  * Enable/Disable wake up events for this serial port.
 161  * Obviously, we only support this on the normal COM port.
 162  */
 163 static int h3xxx_uart_set_wake(struct uart_port *port, u_int enable)
 164 {
 165         int err = -EINVAL;
 166
 167         if (port->mapbase == _Ser3UTCR0) {
 168                 if (enable)
 169                         PWER |= PWER_GPIO23 | PWER_GPIO25; /* DCD and CTS */
 170                 else
 171                         PWER &= ~(PWER_GPIO23 | PWER_GPIO25); /* DCD and CTS */
 172                 err = 0;
 173         }
 174         return err;
 175 }
 176
 177 static struct sa1100_port_fns h3xxx_port_fns __initdata = {
 178         .set_mctrl      = h3xxx_uart_set_mctrl,
 179         .get_mctrl      = h3xxx_uart_get_mctrl,
 180         .pm             = h3xxx_uart_pm,
 181         .set_wake       = h3xxx_uart_set_wake,
 182 };
 183
 184 /*
 185  * EGPIO
 186  */
 187
 188 static struct resource egpio_resources[] = {
 189         [0] = {
 190                 .start  = H3600_EGPIO_PHYS,
 191                 .end    = H3600_EGPIO_PHYS + 0x4 - 1,
 192                 .flags  = IORESOURCE_MEM,
 193         },
 194 };
 195
 196 static struct htc_egpio_chip egpio_chips[] = {
 197         [0] = {
 198                 .reg_start      = 0,
 199                 .gpio_base      = H3XXX_EGPIO_BASE,
 200                 .num_gpios      = 16,
 201                 .direction      = HTC_EGPIO_OUTPUT,
 202                 .initial_values = 0x0080, /* H3XXX_EGPIO_RS232_ON */
 203         },
 204 };
 205
 206 static struct htc_egpio_platform_data egpio_info = {
 207         .reg_width      = 16,
 208         .bus_width      = 16,
 209         .chip           = egpio_chips,
 210         .num_chips      = ARRAY_SIZE(egpio_chips),
 211 };
 212
 213 static struct platform_device h3xxx_egpio = {
 214         .name           = "htc-egpio",
 215         .id             = -1,
 216         .resource       = egpio_resources,
 217         .num_resources  = ARRAY_SIZE(egpio_resources),
 218         .dev            = {
 219                 .platform_data = &egpio_info,
 220         },
 221 };
 222
 223 /*
 224  * GPIO keys
 225  */
 226
 227 static struct gpio_keys_button h3xxx_button_table[] = {
 228         {
 229                 .code           = KEY_POWER,
 230                 .gpio           = H3XXX_GPIO_PWR_BUTTON,
 231                 .desc           = "Power Button",
 232                 .active_low     = 1,
 233                 .type           = EV_KEY,
 234                 .wakeup         = 1,
 235         }, {
 236                 .code           = KEY_ENTER,
 237                 .gpio           = H3XXX_GPIO_ACTION_BUTTON,
 238                 .active_low     = 1,
 239                 .desc           = "Action button",
 240                 .type           = EV_KEY,
 241                 .wakeup         = 0,
 242         },
 243 };
 244
 245 static struct gpio_keys_platform_data h3xxx_keys_data = {
 246         .buttons  = h3xxx_button_table,
 247         .nbuttons = ARRAY_SIZE(h3xxx_button_table),
 248 };
 249
 250 static struct platform_device h3xxx_keys = {
 251         .name   = "gpio-keys",
 252         .id     = -1,
 253         .dev    = {
 254                 .platform_data = &h3xxx_keys_data,
 255         },
 256 };
 257
 258 static struct platform_device *h3xxx_devices[] = {
 259         &h3xxx_egpio,
 260         &h3xxx_keys,
 261 };
 262
 263 void __init h3xxx_mach_init(void)
 264 {
 265         sa1100_register_uart_fns(&h3xxx_port_fns);
 266         sa11x0_register_mtd(&h3xxx_flash_data, &h3xxx_flash_resource, 1);
 267         platform_add_devices(h3xxx_devices, ARRAY_SIZE(h3xxx_devices));
 268 }
 269
 270 static struct map_desc h3600_io_desc[] __initdata = {
 271         {       /* static memory bank 2  CS#2 */
 272                 .virtual        =  H3600_BANK_2_VIRT,
 273                 .pfn            = __phys_to_pfn(SA1100_CS2_PHYS),
 274                 .length         = 0x02800000,
 275                 .type           = MT_DEVICE
 276         }, {    /* static memory bank 4  CS#4 */
 277                 .virtual        =  H3600_BANK_4_VIRT,
 278                 .pfn            = __phys_to_pfn(SA1100_CS4_PHYS),
 279                 .length         = 0x00800000,
 280                 .type           = MT_DEVICE
 281         }, {    /* EGPIO 0              CS#5 */
 282                 .virtual        =  H3600_EGPIO_VIRT,
 283                 .pfn            = __phys_to_pfn(H3600_EGPIO_PHYS),
 284                 .length         = 0x01000000,
 285                 .type           = MT_DEVICE
 286         }
 287 };
 288
 289 /*
 290  * Common map_io initialization
 291  */
 292
 293 void __init h3xxx_map_io(void)
 294 {
 295         sa1100_map_io();
 296         iotable_init(h3600_io_desc, ARRAY_SIZE(h3600_io_desc));
 297
 298         sa1100_register_uart(0, 3); /* Common serial port */
 299 //      sa1100_register_uart(1, 1); /* Microcontroller on 3100/3600 */
 300
 301         /* Ensure those pins are outputs and driving low  */
 302         PPDR |= PPC_TXD4 | PPC_SCLK | PPC_SFRM;
 303         PPSR &= ~(PPC_TXD4 | PPC_SCLK | PPC_SFRM);
 304
 305         /* Configure suspend conditions */
 306         PGSR = 0;
 307         PCFR = PCFR_OPDE;
 308         PSDR = 0;
 309
 310         GPCR = 0x0fffffff;      /* All outputs are set low by default */
 311         GPDR = 0;               /* Configure all GPIOs as input */
 312 }