arch/arm/mach-pxa/eseries.c

   1 /*
   2  * Hardware definitions for the Toshiba eseries PDAs
   3  *
   4  * Copyright (c) 2003 Ian Molton <spyro@f2s.com>
   5  *
   6  * This file is licensed under
   7  * the terms of the GNU General Public License version 2. This program
   8  * is licensed "as is" without any warranty of any kind, whether express
   9  * or implied.
  10  *
  11  */
  12
  13 #include <linux/kernel.h>
  14 #include <linux/init.h>
  15 #include <linux/gpio.h>
  16 #include <linux/delay.h>
  17 #include <linux/platform_device.h>
  18
  19 #include <asm/setup.h>
  20 #include <asm/mach/arch.h>
  21 #include <asm/mach-types.h>
  22
  23 #include <mach/pxa25x.h>
  24 #include <mach/eseries-gpio.h>
  25 #include <mach/udc.h>
  26 #include <mach/irda.h>
  27
  28 #include "generic.h"
  29 #include "clock.h"
  30
  31 /* Only e800 has 128MB RAM */
  32 void __init eseries_fixup(struct machine_desc *desc,
  33         struct tag *tags, char **cmdline, struct meminfo *mi)
  34 {
  35         mi->nr_banks=1;
  36         mi->bank[0].start = 0xa0000000;
  37         mi->bank[0].node = 0;
  38         if (machine_is_e800())
  39                 mi->bank[0].size = (128*1024*1024);
  40         else
  41                 mi->bank[0].size = (64*1024*1024);
  42 }
  43
  44 struct pxa2xx_udc_mach_info e7xx_udc_mach_info = {
  45         .gpio_vbus   = GPIO_E7XX_USB_DISC,
  46         .gpio_pullup = GPIO_E7XX_USB_PULLUP,
  47         .gpio_pullup_inverted = 1
  48 };
  49
  50 static void e7xx_irda_transceiver_mode(struct device *dev, int mode)
  51 {
  52         if (mode & IR_OFF) {
  53                 gpio_set_value(GPIO_E7XX_IR_OFF, 1);
  54                 pxa2xx_transceiver_mode(dev, mode);
  55         } else {
  56                 pxa2xx_transceiver_mode(dev, mode);
  57                 gpio_set_value(GPIO_E7XX_IR_OFF, 0);
  58         }
  59 }
  60
  61 int e7xx_irda_init(void)
  62 {
  63         int ret;
  64
  65         ret = gpio_request(GPIO_E7XX_IR_OFF, "IrDA power");
  66         if (ret)
  67                 goto out;
  68
  69         ret = gpio_direction_output(GPIO_E7XX_IR_OFF, 0);
  70         if (ret)
  71                 goto out;
  72
  73         e7xx_irda_transceiver_mode(NULL, IR_SIRMODE | IR_OFF);
  74 out:
  75         return ret;
  76 }
  77
  78 static void e7xx_irda_shutdown(struct device *dev)
  79 {
  80         e7xx_irda_transceiver_mode(dev, IR_SIRMODE | IR_OFF);
  81         gpio_free(GPIO_E7XX_IR_OFF);
  82 }
  83
  84 struct pxaficp_platform_data e7xx_ficp_platform_data = {
  85         .transceiver_cap  = IR_SIRMODE | IR_OFF,
  86         .transceiver_mode = e7xx_irda_transceiver_mode,
  87         .shutdown = e7xx_irda_shutdown,
  88 };
  89
  90 int eseries_tmio_enable(struct platform_device *dev)
  91 {
  92         /* Reset - bring SUSPEND high before PCLR */
  93         gpio_set_value(GPIO_ESERIES_TMIO_SUSPEND, 0);
  94         gpio_set_value(GPIO_ESERIES_TMIO_PCLR, 0);
  95         msleep(1);
  96         gpio_set_value(GPIO_ESERIES_TMIO_SUSPEND, 1);
  97         msleep(1);
  98         gpio_set_value(GPIO_ESERIES_TMIO_PCLR, 1);
  99         msleep(1);
 100         return 0;
 101 }
 102
 103 int eseries_tmio_disable(struct platform_device *dev)
 104 {
 105         gpio_set_value(GPIO_ESERIES_TMIO_SUSPEND, 0);
 106         gpio_set_value(GPIO_ESERIES_TMIO_PCLR, 0);
 107         return 0;
 108 }
 109
 110 int eseries_tmio_suspend(struct platform_device *dev)
 111 {
 112         gpio_set_value(GPIO_ESERIES_TMIO_SUSPEND, 0);
 113         return 0;
 114 }
 115
 116 int eseries_tmio_resume(struct platform_device *dev)
 117 {
 118         gpio_set_value(GPIO_ESERIES_TMIO_SUSPEND, 1);
 119         msleep(1);
 120         return 0;
 121 }
 122
 123 void eseries_get_tmio_gpios(void)
 124 {
 125         gpio_request(GPIO_ESERIES_TMIO_SUSPEND, NULL);
 126         gpio_request(GPIO_ESERIES_TMIO_PCLR, NULL);
 127         gpio_direction_output(GPIO_ESERIES_TMIO_SUSPEND, 0);
 128         gpio_direction_output(GPIO_ESERIES_TMIO_PCLR, 0);
 129 }
 130
 131 /* TMIO controller uses the same resources on all e-series machines. */
 132 struct resource eseries_tmio_resources[] = {
 133         [0] = {
 134                 .start  = PXA_CS4_PHYS,
 135                 .end    = PXA_CS4_PHYS + 0x1fffff,
 136                 .flags  = IORESOURCE_MEM,
 137         },
 138         [1] = {
 139                 .start  = IRQ_GPIO(GPIO_ESERIES_TMIO_IRQ),
 140                 .end    = IRQ_GPIO(GPIO_ESERIES_TMIO_IRQ),
 141                 .flags  = IORESOURCE_IRQ,
 142         },
 143 };
 144
 145 /* Some e-series hardware cannot control the 32K clock */
 146 static void clk_32k_dummy(struct clk *clk)
 147 {
 148 }
 149
 150 static const struct clkops clk_32k_dummy_ops = {
 151         .enable         = clk_32k_dummy,
 152         .disable        = clk_32k_dummy,
 153 };
 154
 155 static struct clk tmio_dummy_clk = {
 156         .ops    = &clk_32k_dummy_ops,
 157         .rate   = 32768,
 158 };
 159
 160 static struct clk_lookup eseries_clkregs[] = {
 161         INIT_CLKREG(&tmio_dummy_clk, NULL, "CLK_CK32K"),
 162 };
 163
 164 void eseries_register_clks(void)
 165 {
 166         clks_register(eseries_clkregs, ARRAY_SIZE(eseries_clkregs));
 167 }
 168