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/mfp-pxa25x.h>
  24 #include <mach/hardware.h>
  25 #include <mach/eseries-gpio.h>
  26 #include <mach/udc.h>
  27 #include <mach/irda.h>
  28
  29 #include "generic.h"
  30 #include "clock.h"
  31
  32 /* Only e800 has 128MB RAM */
  33 void __init eseries_fixup(struct machine_desc *desc,
  34         struct tag *tags, char **cmdline, struct meminfo *mi)
  35 {
  36         mi->nr_banks=1;
  37         mi->bank[0].start = 0xa0000000;
  38         mi->bank[0].node = 0;
  39         if (machine_is_e800())
  40                 mi->bank[0].size = (128*1024*1024);
  41         else
  42                 mi->bank[0].size = (64*1024*1024);
  43 }
  44
  45 struct pxa2xx_udc_mach_info e7xx_udc_mach_info = {
  46         .gpio_vbus   = GPIO_E7XX_USB_DISC,
  47         .gpio_pullup = GPIO_E7XX_USB_PULLUP,
  48         .gpio_pullup_inverted = 1
  49 };
  50
  51 static void e7xx_irda_transceiver_mode(struct device *dev, int mode)
  52 {
  53         if (mode & IR_OFF) {
  54                 gpio_set_value(GPIO_E7XX_IR_OFF, 1);
  55                 pxa2xx_transceiver_mode(dev, mode);
  56         } else {
  57                 pxa2xx_transceiver_mode(dev, mode);
  58                 gpio_set_value(GPIO_E7XX_IR_OFF, 0);
  59         }
  60 }
  61
  62 int e7xx_irda_init(void)
  63 {
  64         int ret;
  65
  66         ret = gpio_request(GPIO_E7XX_IR_OFF, "IrDA power");
  67         if (ret)
  68                 goto out;
  69
  70         ret = gpio_direction_output(GPIO_E7XX_IR_OFF, 0);
  71         if (ret)
  72                 goto out;
  73
  74         e7xx_irda_transceiver_mode(NULL, IR_SIRMODE | IR_OFF);
  75 out:
  76         return ret;
  77 }
  78
  79 static void e7xx_irda_shutdown(struct device *dev)
  80 {
  81         e7xx_irda_transceiver_mode(dev, IR_SIRMODE | IR_OFF);
  82         gpio_free(GPIO_E7XX_IR_OFF);
  83 }
  84
  85 struct pxaficp_platform_data e7xx_ficp_platform_data = {
  86         .transceiver_cap  = IR_SIRMODE | IR_OFF,
  87         .transceiver_mode = e7xx_irda_transceiver_mode,
  88         .shutdown = e7xx_irda_shutdown,
  89 };
  90
  91 int eseries_tmio_enable(struct platform_device *dev)
  92 {
  93         /* Reset - bring SUSPEND high before PCLR */
  94         gpio_set_value(GPIO_ESERIES_TMIO_SUSPEND, 0);
  95         gpio_set_value(GPIO_ESERIES_TMIO_PCLR, 0);
  96         msleep(1);
  97         gpio_set_value(GPIO_ESERIES_TMIO_SUSPEND, 1);
  98         msleep(1);
  99         gpio_set_value(GPIO_ESERIES_TMIO_PCLR, 1);
 100         msleep(1);
 101         return 0;
 102 }
 103
 104 int eseries_tmio_disable(struct platform_device *dev)
 105 {
 106         gpio_set_value(GPIO_ESERIES_TMIO_SUSPEND, 0);
 107         gpio_set_value(GPIO_ESERIES_TMIO_PCLR, 0);
 108         return 0;
 109 }
 110
 111 int eseries_tmio_suspend(struct platform_device *dev)
 112 {
 113         gpio_set_value(GPIO_ESERIES_TMIO_SUSPEND, 0);
 114         return 0;
 115 }
 116
 117 int eseries_tmio_resume(struct platform_device *dev)
 118 {
 119         gpio_set_value(GPIO_ESERIES_TMIO_SUSPEND, 1);
 120         msleep(1);
 121         return 0;
 122 }
 123
 124 void eseries_get_tmio_gpios(void)
 125 {
 126         gpio_request(GPIO_ESERIES_TMIO_SUSPEND, NULL);
 127         gpio_request(GPIO_ESERIES_TMIO_PCLR, NULL);
 128         gpio_direction_output(GPIO_ESERIES_TMIO_SUSPEND, 0);
 129         gpio_direction_output(GPIO_ESERIES_TMIO_PCLR, 0);
 130 }
 131
 132 /* TMIO controller uses the same resources on all e-series machines. */
 133 struct resource eseries_tmio_resources[] = {
 134         [0] = {
 135                 .start  = PXA_CS4_PHYS,
 136                 .end    = PXA_CS4_PHYS + 0x1fffff,
 137                 .flags  = IORESOURCE_MEM,
 138         },
 139         [1] = {
 140                 .start  = IRQ_GPIO(GPIO_ESERIES_TMIO_IRQ),
 141                 .end    = IRQ_GPIO(GPIO_ESERIES_TMIO_IRQ),
 142                 .flags  = IORESOURCE_IRQ,
 143         },
 144 };
 145
 146 /* Some e-series hardware cannot control the 32K clock */
 147 static void clk_32k_dummy(struct clk *clk)
 148 {
 149 }
 150
 151 static const struct clkops clk_32k_dummy_ops = {
 152         .enable         = clk_32k_dummy,
 153         .disable        = clk_32k_dummy,
 154 };
 155
 156 static struct clk tmio_dummy_clk = {
 157         .ops    = &clk_32k_dummy_ops,
 158         .rate   = 32768,
 159 };
 160
 161 static struct clk_lookup eseries_clkregs[] = {
 162         INIT_CLKREG(&tmio_dummy_clk, NULL, "CLK_CK32K"),
 163 };
 164
 165 void eseries_register_clks(void)
 166 {
 167         clks_register(eseries_clkregs, ARRAY_SIZE(eseries_clkregs));
 168 }
 169