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mv64x60_dev.c

/*
 * Platform device setup for Marvell mv64360/mv64460 host bridges (Discovery)
 *
 * Author: Dale Farnsworth <dale@farnsworth.org>
 *
 * 2007 (c) MontaVista, Software, Inc.  This file is licensed under
 * the terms of the GNU General Public License version 2.  This program
 * is licensed "as is" without any warranty of any kind, whether express
 * or implied.
 */

#include <linux/stddef.h>
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/console.h>
#include <linux/mv643xx.h>
#include <linux/platform_device.h>

#include <asm/prom.h>

/*
 * These functions provide the necessary setup for the mv64x60 drivers.
 * These drivers are unusual in that they work on both the MIPS and PowerPC
 * architectures.  Because of that, the drivers do not support the normal
 * PowerPC of_platform_bus_type.  They support platform_bus_type instead.
 */

/*
 * Create MPSC platform devices
 */
static int __init mv64x60_mpsc_register_shared_pdev(struct device_node *np)
{
      struct platform_device *pdev;
      struct resource r[2];
      struct mpsc_shared_pdata pdata;
      const phandle *ph;
      struct device_node *mpscrouting, *mpscintr;
      int err;

      ph = of_get_property(np, "mpscrouting", NULL);
      mpscrouting = of_find_node_by_phandle(*ph);
      if (!mpscrouting)
            return -ENODEV;

      err = of_address_to_resource(mpscrouting, 0, &r[0]);
      of_node_put(mpscrouting);
      if (err)
            return err;

      ph = of_get_property(np, "mpscintr", NULL);
      mpscintr = of_find_node_by_phandle(*ph);
      if (!mpscintr)
            return -ENODEV;

      err = of_address_to_resource(mpscintr, 0, &r[1]);
      of_node_put(mpscintr);
      if (err)
            return err;

      memset(&pdata, 0, sizeof(pdata));

      pdev = platform_device_alloc(MPSC_SHARED_NAME, 0);
      if (!pdev)
            return -ENOMEM;

      err = platform_device_add_resources(pdev, r, 2);
      if (err)
            goto error;

      err = platform_device_add_data(pdev, &pdata, sizeof(pdata));
      if (err)
            goto error;

      err = platform_device_add(pdev);
      if (err)
            goto error;

      return 0;

error:
      platform_device_put(pdev);
      return err;
}


static int __init mv64x60_mpsc_device_setup(struct device_node *np, int id)
{
      struct resource r[5];
      struct mpsc_pdata pdata;
      struct platform_device *pdev;
      const unsigned int *prop;
      const phandle *ph;
      struct device_node *sdma, *brg;
      int err;
      int port_number;

      /* only register the shared platform device the first time through */
      if (id == 0 && (err = mv64x60_mpsc_register_shared_pdev(np)))
            return err;

      memset(r, 0, sizeof(r));

      err = of_address_to_resource(np, 0, &r[0]);
      if (err)
            return err;

      of_irq_to_resource(np, 0, &r[4]);

      ph = of_get_property(np, "sdma", NULL);
      sdma = of_find_node_by_phandle(*ph);
      if (!sdma)
            return -ENODEV;

      of_irq_to_resource(sdma, 0, &r[3]);
      err = of_address_to_resource(sdma, 0, &r[1]);
      of_node_put(sdma);
      if (err)
            return err;

      ph = of_get_property(np, "brg", NULL);
      brg = of_find_node_by_phandle(*ph);
      if (!brg)
            return -ENODEV;

      err = of_address_to_resource(brg, 0, &r[2]);
      of_node_put(brg);
      if (err)
            return err;

      prop = of_get_property(np, "block-index", NULL);
      if (!prop)
            return -ENODEV;
      port_number = *(int *)prop;

      memset(&pdata, 0, sizeof(pdata));

      pdata.cache_mgmt = 1; /* All current revs need this set */

      prop = of_get_property(np, "max_idle", NULL);
      if (prop)
            pdata.max_idle = *prop;

      prop = of_get_property(brg, "current-speed", NULL);
      if (prop)
            pdata.default_baud = *prop;

      /* Default is 8 bits, no parity, no flow control */
      pdata.default_bits = 8;
      pdata.default_parity = 'n';
      pdata.default_flow = 'n';

      prop = of_get_property(np, "chr_1", NULL);
      if (prop)
            pdata.chr_1_val = *prop;

      prop = of_get_property(np, "chr_2", NULL);
      if (prop)
            pdata.chr_2_val = *prop;

      prop = of_get_property(np, "chr_10", NULL);
      if (prop)
            pdata.chr_10_val = *prop;

      prop = of_get_property(np, "mpcr", NULL);
      if (prop)
            pdata.mpcr_val = *prop;

      prop = of_get_property(brg, "bcr", NULL);
      if (prop)
            pdata.bcr_val = *prop;

      pdata.brg_can_tune = 1; /* All current revs need this set */

      prop = of_get_property(brg, "clock-src", NULL);
      if (prop)
            pdata.brg_clk_src = *prop;

      prop = of_get_property(brg, "clock-frequency", NULL);
      if (prop)
            pdata.brg_clk_freq = *prop;

      pdev = platform_device_alloc(MPSC_CTLR_NAME, port_number);
      if (!pdev)
            return -ENOMEM;

      err = platform_device_add_resources(pdev, r, 5);
      if (err)
            goto error;

      err = platform_device_add_data(pdev, &pdata, sizeof(pdata));
      if (err)
            goto error;

      err = platform_device_add(pdev);
      if (err)
            goto error;

      return 0;

error:
      platform_device_put(pdev);
      return err;
}

/*
 * Create mv64x60_eth platform devices
 */
static int __init eth_register_shared_pdev(struct device_node *np)
{
      struct platform_device *pdev;
      struct resource r[1];
      int err;

      np = of_get_parent(np);
      if (!np)
            return -ENODEV;

      err = of_address_to_resource(np, 0, &r[0]);
      of_node_put(np);
      if (err)
            return err;

      pdev = platform_device_register_simple(MV643XX_ETH_SHARED_NAME, 0,
                                     r, 1);
      if (IS_ERR(pdev))
            return PTR_ERR(pdev);

      return 0;
}

static int __init mv64x60_eth_device_setup(struct device_node *np, int id)
{
      struct resource r[1];
      struct mv643xx_eth_platform_data pdata;
      struct platform_device *pdev;
      struct device_node *phy;
      const u8 *mac_addr;
      const int *prop;
      const phandle *ph;
      int err;

      /* only register the shared platform device the first time through */
      if (id == 0 && (err = eth_register_shared_pdev(np)))
            return err;;

      memset(r, 0, sizeof(r));
      of_irq_to_resource(np, 0, &r[0]);

      memset(&pdata, 0, sizeof(pdata));

      prop = of_get_property(np, "block-index", NULL);
      if (!prop)
            return -ENODEV;
      pdata.port_number = *prop;

      mac_addr = of_get_mac_address(np);
      if (mac_addr)
            memcpy(pdata.mac_addr, mac_addr, 6);

      prop = of_get_property(np, "speed", NULL);
      if (prop)
            pdata.speed = *prop;

      prop = of_get_property(np, "tx_queue_size", NULL);
      if (prop)
            pdata.tx_queue_size = *prop;

      prop = of_get_property(np, "rx_queue_size", NULL);
      if (prop)
            pdata.rx_queue_size = *prop;

      prop = of_get_property(np, "tx_sram_addr", NULL);
      if (prop)
            pdata.tx_sram_addr = *prop;

      prop = of_get_property(np, "tx_sram_size", NULL);
      if (prop)
            pdata.tx_sram_size = *prop;

      prop = of_get_property(np, "rx_sram_addr", NULL);
      if (prop)
            pdata.rx_sram_addr = *prop;

      prop = of_get_property(np, "rx_sram_size", NULL);
      if (prop)
            pdata.rx_sram_size = *prop;

      ph = of_get_property(np, "phy", NULL);
      if (!ph)
            return -ENODEV;

      phy = of_find_node_by_phandle(*ph);
      if (phy == NULL)
            return -ENODEV;

      prop = of_get_property(phy, "reg", NULL);
      if (prop) {
            pdata.force_phy_addr = 1;
            pdata.phy_addr = *prop;
      }

      of_node_put(phy);

      pdev = platform_device_alloc(MV643XX_ETH_NAME, pdata.port_number);
      if (!pdev)
            return -ENOMEM;

      err = platform_device_add_resources(pdev, r, 1);
      if (err)
            goto error;

      err = platform_device_add_data(pdev, &pdata, sizeof(pdata));
      if (err)
            goto error;

      err = platform_device_add(pdev);
      if (err)
            goto error;

      return 0;

error:
      platform_device_put(pdev);
      return err;
}

/*
 * Create mv64x60_i2c platform devices
 */
static int __init mv64x60_i2c_device_setup(struct device_node *np, int id)
{
      struct resource r[2];
      struct platform_device *pdev;
      struct mv64xxx_i2c_pdata pdata;
      const unsigned int *prop;
      int err;

      memset(r, 0, sizeof(r));

      err = of_address_to_resource(np, 0, &r[0]);
      if (err)
            return err;

      of_irq_to_resource(np, 0, &r[1]);

      memset(&pdata, 0, sizeof(pdata));

      prop = of_get_property(np, "freq_m", NULL);
      if (!prop)
            return -ENODEV;
      pdata.freq_m = *prop;

      prop = of_get_property(np, "freq_n", NULL);
      if (!prop)
            return -ENODEV;
      pdata.freq_n = *prop;

      prop = of_get_property(np, "timeout", NULL);
      if (prop)
            pdata.timeout = *prop;
      else
            pdata.timeout = 1000;   /* 1 second */

      prop = of_get_property(np, "retries", NULL);
      if (prop)
            pdata.retries = *prop;
      else
            pdata.retries = 1;

      pdev = platform_device_alloc(MV64XXX_I2C_CTLR_NAME, id);
      if (!pdev)
            return -ENOMEM;

      err = platform_device_add_resources(pdev, r, 2);
      if (err)
            goto error;

      err = platform_device_add_data(pdev, &pdata, sizeof(pdata));
      if (err)
            goto error;

      err = platform_device_add(pdev);
      if (err)
            goto error;

      return 0;

error:
      platform_device_put(pdev);
      return err;
}

/*
 * Create mv64x60_wdt platform devices
 */
static int __init mv64x60_wdt_device_setup(struct device_node *np, int id)
{
      struct resource r;
      struct platform_device *pdev;
      struct mv64x60_wdt_pdata pdata;
      const unsigned int *prop;
      int err;

      err = of_address_to_resource(np, 0, &r);
      if (err)
            return err;

      memset(&pdata, 0, sizeof(pdata));

      prop = of_get_property(np, "timeout", NULL);
      if (!prop)
            return -ENODEV;
      pdata.timeout = *prop;

      np = of_get_parent(np);
      if (!np)
            return -ENODEV;

      prop = of_get_property(np, "clock-frequency", NULL);
      of_node_put(np);
      if (!prop)
            return -ENODEV;
      pdata.bus_clk = *prop / 1000000; /* wdt driver wants freq in MHz */

      pdev = platform_device_alloc(MV64x60_WDT_NAME, id);
      if (!pdev)
            return -ENOMEM;

      err = platform_device_add_resources(pdev, &r, 1);
      if (err)
            goto error;

      err = platform_device_add_data(pdev, &pdata, sizeof(pdata));
      if (err)
            goto error;

      err = platform_device_add(pdev);
      if (err)
            goto error;

      return 0;

error:
      platform_device_put(pdev);
      return err;
}

static int __init mv64x60_device_setup(void)
{
      struct device_node *np = NULL;
      int id;
      int err;

      for (id = 0;
           (np = of_find_compatible_node(np, "serial", "marvell,mpsc")); id++)
            if ((err = mv64x60_mpsc_device_setup(np, id)))
                  goto error;

      for (id = 0;
           (np = of_find_compatible_node(np, "network",
                                 "marvell,mv64x60-eth"));
           id++)
            if ((err = mv64x60_eth_device_setup(np, id)))
                  goto error;

      for (id = 0;
           (np = of_find_compatible_node(np, "i2c", "marvell,mv64x60-i2c"));
           id++)
            if ((err = mv64x60_i2c_device_setup(np, id)))
                  goto error;

      /* support up to one watchdog timer */
      np = of_find_compatible_node(np, NULL, "marvell,mv64x60-wdt");
      if (np) {
            if ((err = mv64x60_wdt_device_setup(np, id)))
                  goto error;
            of_node_put(np);
      }


      return 0;

error:
      of_node_put(np);
      return err;
}
arch_initcall(mv64x60_device_setup);

static int __init mv64x60_add_mpsc_console(void)
{
      struct device_node *np = NULL;
      const char *prop;

      prop = of_get_property(of_chosen, "linux,stdout-path", NULL);
      if (prop == NULL)
            goto not_mpsc;

      np = of_find_node_by_path(prop);
      if (!np)
            goto not_mpsc;

      if (!of_device_is_compatible(np, "marvell,mpsc"))
            goto not_mpsc;

      prop = of_get_property(np, "block-index", NULL);
      if (!prop)
            goto not_mpsc;

      add_preferred_console("ttyMM", *(int *)prop, NULL);

not_mpsc:
      return 0;
}
console_initcall(mv64x60_add_mpsc_console);

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