arch/arm/mach-sa1100/h3xxx.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  * Support for Compaq iPAQ H3100 and H3600 handheld computers (common code)
   4  *
   5  * Copyright (c) 2000,1 Compaq Computer Corporation. (Author: Jamey Hicks)
   6  * Copyright (c) 2009 Dmitry Artamonow <mad_soft@inbox.ru>
   7  */
   8
   9 #include <linux/kernel.h>
  10 #include <linux/gpio/machine.h>
  11 #include <linux/gpio.h>
  12 #include <linux/gpio_keys.h>
  13 #include <linux/input.h>
  14 #include <linux/mtd/mtd.h>
  15 #include <linux/mtd/partitions.h>
  16 #include <linux/platform_data/gpio-htc-egpio.h>
  17 #include <linux/platform_data/sa11x0-serial.h>
  18 #include <linux/platform_device.h>
  19 #include <linux/serial_core.h>
  20
  21 #include <asm/mach/flash.h>
  22 #include <asm/mach/map.h>
  23
  24 #include <mach/h3xxx.h>
  25 #include <mach/irqs.h>
  26
  27 #include "generic.h"
  28
  29 /*
  30  * H3xxx flash support
  31  */
  32 static struct mtd_partition h3xxx_partitions[] = {
  33         {
  34                 .name           = "H3XXX boot firmware",
  35                 .size           = 0x00040000,
  36                 .offset         = 0,
  37                 .mask_flags     = MTD_WRITEABLE,  /* force read-only */
  38         }, {
  39                 .name           = "H3XXX rootfs",
  40                 .size           = MTDPART_SIZ_FULL,
  41                 .offset         = 0x00040000,
  42         }
  43 };
  44
  45 static void h3xxx_set_vpp(int vpp)
  46 {
  47         gpio_set_value(H3XXX_EGPIO_VPP_ON, vpp);
  48 }
  49
  50 static int h3xxx_flash_init(void)
  51 {
  52         int err = gpio_request(H3XXX_EGPIO_VPP_ON, "Flash Vpp");
  53         if (err) {
  54                 pr_err("%s: can't request H3XXX_EGPIO_VPP_ON\n", __func__);
  55                 return err;
  56         }
  57
  58         err = gpio_direction_output(H3XXX_EGPIO_VPP_ON, 0);
  59         if (err)
  60                 gpio_free(H3XXX_EGPIO_VPP_ON);
  61
  62         return err;
  63 }
  64
  65 static void h3xxx_flash_exit(void)
  66 {
  67         gpio_free(H3XXX_EGPIO_VPP_ON);
  68 }
  69
  70 static struct flash_platform_data h3xxx_flash_data = {
  71         .map_name       = "cfi_probe",
  72         .set_vpp        = h3xxx_set_vpp,
  73         .init           = h3xxx_flash_init,
  74         .exit           = h3xxx_flash_exit,
  75         .parts          = h3xxx_partitions,
  76         .nr_parts       = ARRAY_SIZE(h3xxx_partitions),
  77 };
  78
  79 static struct resource h3xxx_flash_resource =
  80         DEFINE_RES_MEM(SA1100_CS0_PHYS, SZ_32M);
  81
  82
  83 /*
  84  * H3xxx uart support
  85  */
  86 static void h3xxx_uart_pm(struct uart_port *port, u_int state, u_int oldstate)
  87 {
  88         if (port->mapbase == _Ser3UTCR0) {
  89                 if (!gpio_request(H3XXX_EGPIO_RS232_ON, "RS232 transceiver")) {
  90                         gpio_direction_output(H3XXX_EGPIO_RS232_ON, !state);
  91                         gpio_free(H3XXX_EGPIO_RS232_ON);
  92                 } else {
  93                         pr_err("%s: can't request H3XXX_EGPIO_RS232_ON\n",
  94                                 __func__);
  95                 }
  96         }
  97 }
  98
  99 /*
 100  * Enable/Disable wake up events for this serial port.
 101  * Obviously, we only support this on the normal COM port.
 102  */
 103 static int h3xxx_uart_set_wake(struct uart_port *port, u_int enable)
 104 {
 105         int err = -EINVAL;
 106
 107         if (port->mapbase == _Ser3UTCR0) {
 108                 if (enable)
 109                         PWER |= PWER_GPIO23 | PWER_GPIO25; /* DCD and CTS */
 110                 else
 111                         PWER &= ~(PWER_GPIO23 | PWER_GPIO25); /* DCD and CTS */
 112                 err = 0;
 113         }
 114         return err;
 115 }
 116
 117 static struct sa1100_port_fns h3xxx_port_fns __initdata = {
 118         .pm             = h3xxx_uart_pm,
 119         .set_wake       = h3xxx_uart_set_wake,
 120 };
 121
 122 static struct gpiod_lookup_table h3xxx_uart3_gpio_table = {
 123         .dev_id = "sa11x0-uart.3",
 124         .table = {
 125                 GPIO_LOOKUP("gpio", H3XXX_GPIO_COM_DCD, "dcd", GPIO_ACTIVE_LOW),
 126                 GPIO_LOOKUP("gpio", H3XXX_GPIO_COM_CTS, "cts", GPIO_ACTIVE_LOW),
 127                 GPIO_LOOKUP("gpio", H3XXX_GPIO_COM_RTS, "rts", GPIO_ACTIVE_LOW),
 128                 { },
 129         },
 130 };
 131
 132 /*
 133  * EGPIO
 134  */
 135
 136 static struct resource egpio_resources[] = {
 137         [0] = DEFINE_RES_MEM(H3600_EGPIO_PHYS, 0x4),
 138 };
 139
 140 static struct htc_egpio_chip egpio_chips[] = {
 141         [0] = {
 142                 .reg_start      = 0,
 143                 .gpio_base      = H3XXX_EGPIO_BASE,
 144                 .num_gpios      = 16,
 145                 .direction      = HTC_EGPIO_OUTPUT,
 146                 .initial_values = 0x0080, /* H3XXX_EGPIO_RS232_ON */
 147         },
 148 };
 149
 150 static struct htc_egpio_platform_data egpio_info = {
 151         .reg_width      = 16,
 152         .bus_width      = 16,
 153         .chip           = egpio_chips,
 154         .num_chips      = ARRAY_SIZE(egpio_chips),
 155 };
 156
 157 static struct platform_device h3xxx_egpio = {
 158         .name           = "htc-egpio",
 159         .id             = -1,
 160         .resource       = egpio_resources,
 161         .num_resources  = ARRAY_SIZE(egpio_resources),
 162         .dev            = {
 163                 .platform_data = &egpio_info,
 164         },
 165 };
 166
 167 /*
 168  * GPIO keys
 169  */
 170
 171 static struct gpio_keys_button h3xxx_button_table[] = {
 172         {
 173                 .code           = KEY_POWER,
 174                 .gpio           = H3XXX_GPIO_PWR_BUTTON,
 175                 .desc           = "Power Button",
 176                 .active_low     = 1,
 177                 .type           = EV_KEY,
 178                 .wakeup         = 1,
 179         }, {
 180                 .code           = KEY_ENTER,
 181                 .gpio           = H3XXX_GPIO_ACTION_BUTTON,
 182                 .active_low     = 1,
 183                 .desc           = "Action button",
 184                 .type           = EV_KEY,
 185                 .wakeup         = 0,
 186         },
 187 };
 188
 189 static struct gpio_keys_platform_data h3xxx_keys_data = {
 190         .buttons  = h3xxx_button_table,
 191         .nbuttons = ARRAY_SIZE(h3xxx_button_table),
 192 };
 193
 194 static struct platform_device h3xxx_keys = {
 195         .name   = "gpio-keys",
 196         .id     = -1,
 197         .dev    = {
 198                 .platform_data = &h3xxx_keys_data,
 199         },
 200 };
 201
 202 static struct resource h3xxx_micro_resources[] = {
 203         DEFINE_RES_MEM(0x80010000, SZ_4K),
 204         DEFINE_RES_MEM(0x80020000, SZ_4K),
 205         DEFINE_RES_IRQ(IRQ_Ser1UART),
 206 };
 207
 208 struct platform_device h3xxx_micro_asic = {
 209         .name = "ipaq-h3xxx-micro",
 210         .id = -1,
 211         .resource = h3xxx_micro_resources,
 212         .num_resources = ARRAY_SIZE(h3xxx_micro_resources),
 213 };
 214
 215 static struct platform_device *h3xxx_devices[] = {
 216         &h3xxx_egpio,
 217         &h3xxx_keys,
 218         &h3xxx_micro_asic,
 219 };
 220
 221 static struct gpiod_lookup_table h3xxx_pcmcia_gpio_table = {
 222         .dev_id = "sa11x0-pcmcia",
 223         .table = {
 224                 GPIO_LOOKUP("gpio", H3XXX_GPIO_PCMCIA_CD0,
 225                             "pcmcia0-detect", GPIO_ACTIVE_LOW),
 226                 GPIO_LOOKUP("gpio", H3XXX_GPIO_PCMCIA_IRQ0,
 227                             "pcmcia0-ready", GPIO_ACTIVE_HIGH),
 228                 GPIO_LOOKUP("gpio", H3XXX_GPIO_PCMCIA_CD1,
 229                             "pcmcia1-detect", GPIO_ACTIVE_LOW),
 230                 GPIO_LOOKUP("gpio", H3XXX_GPIO_PCMCIA_IRQ1,
 231                             "pcmcia1-ready", GPIO_ACTIVE_HIGH),
 232                 { },
 233         },
 234 };
 235
 236 void __init h3xxx_mach_init(void)
 237 {
 238         gpiod_add_lookup_table(&h3xxx_pcmcia_gpio_table);
 239         gpiod_add_lookup_table(&h3xxx_uart3_gpio_table);
 240         sa1100_register_uart_fns(&h3xxx_port_fns);
 241         sa11x0_register_mtd(&h3xxx_flash_data, &h3xxx_flash_resource, 1);
 242         platform_add_devices(h3xxx_devices, ARRAY_SIZE(h3xxx_devices));
 243 }
 244
 245 static struct map_desc h3600_io_desc[] __initdata = {
 246         {       /* static memory bank 2  CS#2 */
 247                 .virtual        =  H3600_BANK_2_VIRT,
 248                 .pfn            = __phys_to_pfn(SA1100_CS2_PHYS),
 249                 .length         = 0x02800000,
 250                 .type           = MT_DEVICE
 251         }, {    /* static memory bank 4  CS#4 */
 252                 .virtual        =  H3600_BANK_4_VIRT,
 253                 .pfn            = __phys_to_pfn(SA1100_CS4_PHYS),
 254                 .length         = 0x00800000,
 255                 .type           = MT_DEVICE
 256         }, {    /* EGPIO 0              CS#5 */
 257                 .virtual        =  H3600_EGPIO_VIRT,
 258                 .pfn            = __phys_to_pfn(H3600_EGPIO_PHYS),
 259                 .length         = 0x01000000,
 260                 .type           = MT_DEVICE
 261         }
 262 };
 263
 264 /*
 265  * Common map_io initialization
 266  */
 267
 268 void __init h3xxx_map_io(void)
 269 {
 270         sa1100_map_io();
 271         iotable_init(h3600_io_desc, ARRAY_SIZE(h3600_io_desc));
 272
 273         sa1100_register_uart(0, 3); /* Common serial port */
 274 //      sa1100_register_uart(1, 1); /* Microcontroller on 3100/3600 */
 275
 276         /* Ensure those pins are outputs and driving low  */
 277         PPDR |= PPC_TXD4 | PPC_SCLK | PPC_SFRM;
 278         PPSR &= ~(PPC_TXD4 | PPC_SCLK | PPC_SFRM);
 279
 280         /* Configure suspend conditions */
 281         PGSR = 0;
 282         PCFR = PCFR_OPDE;
 283         PSDR = 0;
 284
 285         GPCR = 0x0fffffff;      /* All outputs are set low by default */
 286         GPDR = 0;               /* Configure all GPIOs as input */
 287 }
 288