arch/powerpc/platforms/8xx/mpc885ads_setup.c

   1 /*
   2  * Platform setup for the Freescale mpc885ads board
   3  *
   4  * Vitaly Bordug <vbordug@ru.mvista.com>
   5  *
   6  * Copyright 2005 MontaVista Software Inc.
   7  *
   8  * Heavily modified by Scott Wood <scottwood@freescale.com>
   9  * Copyright 2007 Freescale Semiconductor, Inc.
  10  *
  11  * This file is licensed under the terms of the GNU General Public License
  12  * version 2. This program is licensed "as is" without any warranty of any
  13  * kind, whether express or implied.
  14  */
  15
  16 #include <linux/init.h>
  17 #include <linux/module.h>
  18 #include <linux/param.h>
  19 #include <linux/string.h>
  20 #include <linux/ioport.h>
  21 #include <linux/device.h>
  22 #include <linux/delay.h>
  23
  24 #include <linux/fs_enet_pd.h>
  25 #include <linux/fs_uart_pd.h>
  26 #include <linux/fsl_devices.h>
  27 #include <linux/mii.h>
  28 #include <linux/of_address.h>
  29 #include <linux/of_fdt.h>
  30 #include <linux/of_platform.h>
  31
  32 #include <asm/delay.h>
  33 #include <asm/io.h>
  34 #include <asm/machdep.h>
  35 #include <asm/page.h>
  36 #include <asm/processor.h>
  37 #include <asm/time.h>
  38 #include <asm/8xx_immap.h>
  39 #include <asm/cpm1.h>
  40 #include <asm/fs_pd.h>
  41 #include <asm/udbg.h>
  42
  43 #include "mpc885ads.h"
  44 #include "mpc8xx.h"
  45
  46 static u32 __iomem *bcsr, *bcsr5;
  47
  48 struct cpm_pin {
  49         int port, pin, flags;
  50 };
  51
  52 static struct cpm_pin mpc885ads_pins[] = {
  53         /* SMC1 */
  54         {CPM_PORTB, 24, CPM_PIN_INPUT}, /* RX */
  55         {CPM_PORTB, 25, CPM_PIN_INPUT | CPM_PIN_SECONDARY}, /* TX */
  56
  57         /* SMC2 */
  58 #ifndef CONFIG_MPC8xx_SECOND_ETH_FEC2
  59         {CPM_PORTE, 21, CPM_PIN_INPUT}, /* RX */
  60         {CPM_PORTE, 20, CPM_PIN_INPUT | CPM_PIN_SECONDARY}, /* TX */
  61 #endif
  62
  63         /* SCC3 */
  64         {CPM_PORTA, 9, CPM_PIN_INPUT}, /* RX */
  65         {CPM_PORTA, 8, CPM_PIN_INPUT}, /* TX */
  66         {CPM_PORTC, 4, CPM_PIN_INPUT | CPM_PIN_SECONDARY | CPM_PIN_GPIO}, /* RENA */
  67         {CPM_PORTC, 5, CPM_PIN_INPUT | CPM_PIN_SECONDARY | CPM_PIN_GPIO}, /* CLSN */
  68         {CPM_PORTE, 27, CPM_PIN_INPUT | CPM_PIN_SECONDARY}, /* TENA */
  69         {CPM_PORTE, 17, CPM_PIN_INPUT}, /* CLK5 */
  70         {CPM_PORTE, 16, CPM_PIN_INPUT}, /* CLK6 */
  71
  72         /* MII1 */
  73         {CPM_PORTA, 0, CPM_PIN_INPUT},
  74         {CPM_PORTA, 1, CPM_PIN_INPUT},
  75         {CPM_PORTA, 2, CPM_PIN_INPUT},
  76         {CPM_PORTA, 3, CPM_PIN_INPUT},
  77         {CPM_PORTA, 4, CPM_PIN_OUTPUT},
  78         {CPM_PORTA, 10, CPM_PIN_OUTPUT},
  79         {CPM_PORTA, 11, CPM_PIN_OUTPUT},
  80         {CPM_PORTB, 19, CPM_PIN_INPUT},
  81         {CPM_PORTB, 31, CPM_PIN_INPUT},
  82         {CPM_PORTC, 12, CPM_PIN_INPUT},
  83         {CPM_PORTC, 13, CPM_PIN_INPUT},
  84         {CPM_PORTE, 30, CPM_PIN_OUTPUT},
  85         {CPM_PORTE, 31, CPM_PIN_OUTPUT},
  86
  87         /* MII2 */
  88 #ifdef CONFIG_MPC8xx_SECOND_ETH_FEC2
  89         {CPM_PORTE, 14, CPM_PIN_OUTPUT | CPM_PIN_SECONDARY},
  90         {CPM_PORTE, 15, CPM_PIN_OUTPUT | CPM_PIN_SECONDARY},
  91         {CPM_PORTE, 16, CPM_PIN_OUTPUT},
  92         {CPM_PORTE, 17, CPM_PIN_OUTPUT | CPM_PIN_SECONDARY},
  93         {CPM_PORTE, 18, CPM_PIN_OUTPUT | CPM_PIN_SECONDARY},
  94         {CPM_PORTE, 19, CPM_PIN_OUTPUT | CPM_PIN_SECONDARY},
  95         {CPM_PORTE, 20, CPM_PIN_OUTPUT | CPM_PIN_SECONDARY},
  96         {CPM_PORTE, 21, CPM_PIN_OUTPUT},
  97         {CPM_PORTE, 22, CPM_PIN_OUTPUT},
  98         {CPM_PORTE, 23, CPM_PIN_OUTPUT},
  99         {CPM_PORTE, 24, CPM_PIN_OUTPUT},
 100         {CPM_PORTE, 25, CPM_PIN_OUTPUT},
 101         {CPM_PORTE, 26, CPM_PIN_OUTPUT},
 102         {CPM_PORTE, 27, CPM_PIN_OUTPUT},
 103         {CPM_PORTE, 28, CPM_PIN_OUTPUT},
 104         {CPM_PORTE, 29, CPM_PIN_OUTPUT},
 105 #endif
 106         /* I2C */
 107         {CPM_PORTB, 26, CPM_PIN_INPUT | CPM_PIN_OPENDRAIN},
 108         {CPM_PORTB, 27, CPM_PIN_INPUT | CPM_PIN_OPENDRAIN},
 109 };
 110
 111 static void __init init_ioports(void)
 112 {
 113         int i;
 114
 115         for (i = 0; i < ARRAY_SIZE(mpc885ads_pins); i++) {
 116                 struct cpm_pin *pin = &mpc885ads_pins[i];
 117                 cpm1_set_pin(pin->port, pin->pin, pin->flags);
 118         }
 119
 120         cpm1_clk_setup(CPM_CLK_SMC1, CPM_BRG1, CPM_CLK_RTX);
 121         cpm1_clk_setup(CPM_CLK_SMC2, CPM_BRG2, CPM_CLK_RTX);
 122         cpm1_clk_setup(CPM_CLK_SCC3, CPM_CLK5, CPM_CLK_TX);
 123         cpm1_clk_setup(CPM_CLK_SCC3, CPM_CLK6, CPM_CLK_RX);
 124
 125         /* Set FEC1 and FEC2 to MII mode */
 126         clrbits32(&mpc8xx_immr->im_cpm.cp_cptr, 0x00000180);
 127 }
 128
 129 static void __init mpc885ads_setup_arch(void)
 130 {
 131         struct device_node *np;
 132
 133         cpm_reset();
 134         init_ioports();
 135
 136         np = of_find_compatible_node(NULL, NULL, "fsl,mpc885ads-bcsr");
 137         if (!np) {
 138                 printk(KERN_CRIT "Could not find fsl,mpc885ads-bcsr node\n");
 139                 return;
 140         }
 141
 142         bcsr = of_iomap(np, 0);
 143         bcsr5 = of_iomap(np, 1);
 144         of_node_put(np);
 145
 146         if (!bcsr || !bcsr5) {
 147                 printk(KERN_CRIT "Could not remap BCSR\n");
 148                 return;
 149         }
 150
 151         clrbits32(&bcsr[1], BCSR1_RS232EN_1);
 152 #ifdef CONFIG_MPC8xx_SECOND_ETH_FEC2
 153         setbits32(&bcsr[1], BCSR1_RS232EN_2);
 154 #else
 155         clrbits32(&bcsr[1], BCSR1_RS232EN_2);
 156 #endif
 157
 158         clrbits32(bcsr5, BCSR5_MII1_EN);
 159         setbits32(bcsr5, BCSR5_MII1_RST);
 160         udelay(1000);
 161         clrbits32(bcsr5, BCSR5_MII1_RST);
 162
 163 #ifdef CONFIG_MPC8xx_SECOND_ETH_FEC2
 164         clrbits32(bcsr5, BCSR5_MII2_EN);
 165         setbits32(bcsr5, BCSR5_MII2_RST);
 166         udelay(1000);
 167         clrbits32(bcsr5, BCSR5_MII2_RST);
 168 #else
 169         setbits32(bcsr5, BCSR5_MII2_EN);
 170 #endif
 171
 172 #ifdef CONFIG_MPC8xx_SECOND_ETH_SCC3
 173         clrbits32(&bcsr[4], BCSR4_ETH10_RST);
 174         udelay(1000);
 175         setbits32(&bcsr[4], BCSR4_ETH10_RST);
 176
 177         setbits32(&bcsr[1], BCSR1_ETHEN);
 178
 179         np = of_find_node_by_path("/soc@ff000000/cpm@9c0/serial@a80");
 180 #else
 181         np = of_find_node_by_path("/soc@ff000000/cpm@9c0/ethernet@a40");
 182 #endif
 183
 184         /* The SCC3 enet registers overlap the SMC1 registers, so
 185          * one of the two must be removed from the device tree.
 186          */
 187
 188         if (np) {
 189                 of_detach_node(np);
 190                 of_node_put(np);
 191         }
 192 }
 193
 194 static int __init mpc885ads_probe(void)
 195 {
 196         return of_machine_is_compatible("fsl,mpc885ads");
 197 }
 198
 199 static const struct of_device_id of_bus_ids[] __initconst = {
 200         { .name = "soc", },
 201         { .name = "cpm", },
 202         { .name = "localbus", },
 203         {},
 204 };
 205
 206 static int __init declare_of_platform_devices(void)
 207 {
 208         /* Publish the QE devices */
 209         of_platform_bus_probe(NULL, of_bus_ids, NULL);
 210
 211         return 0;
 212 }
 213 machine_device_initcall(mpc885_ads, declare_of_platform_devices);
 214
 215 define_machine(mpc885_ads) {
 216         .name                   = "Freescale MPC885 ADS",
 217         .probe                  = mpc885ads_probe,
 218         .setup_arch             = mpc885ads_setup_arch,
 219         .init_IRQ               = mpc8xx_pics_init,
 220         .get_irq                = mpc8xx_get_irq,
 221         .restart                = mpc8xx_restart,
 222         .calibrate_decr         = mpc8xx_calibrate_decr,
 223         .progress               = udbg_progress,
 224 };