[PATCH] powerpc: Add FSL SOC library and setup code
Parse the flat device tree for devices on Freescale SOC's that we know about (gianfar, gianfar_mdio, i2c, mpc83xx_wdt). We need to setup platform devices and platform data for these devices to match arch/ppc usage. Also add a helper function (get_immrbase) that reports the base address of the MMIO registers on the SOC. Signed-off-by: Kumar Gala <galak@kernel.crashing.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
This commit is contained in:
Kumar Gala
Paul Mackerras
Родитель
b8e383d592
Коммит
eed3200108
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@ -7,3 +7,4 @@ obj-$(CONFIG_40x) += dcr.o
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obj-$(CONFIG_U3_DART) += dart_iommu.o
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obj-$(CONFIG_MMIO_NVRAM) += mmio_nvram.o
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obj-$(CONFIG_PPC_83xx) += ipic.o
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obj-$(CONFIG_FSL_SOC) += fsl_soc.o
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@ -0,0 +1,317 @@
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/*
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* FSL SoC setup code
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*
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* Maintained by Kumar Gala (see MAINTAINERS for contact information)
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the
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* Free Software Foundation; either version 2 of the License, or (at your
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* option) any later version.
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*/
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#include <linux/config.h>
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#include <linux/stddef.h>
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#include <linux/kernel.h>
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#include <linux/init.h>
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#include <linux/errno.h>
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#include <linux/major.h>
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#include <linux/delay.h>
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#include <linux/irq.h>
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#include <linux/module.h>
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#include <linux/device.h>
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#include <linux/platform_device.h>
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#include <linux/fsl_devices.h>
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#include <asm/system.h>
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#include <asm/atomic.h>
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#include <asm/io.h>
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#include <asm/irq.h>
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#include <asm/prom.h>
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#include <sysdev/fsl_soc.h>
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#include <mm/mmu_decl.h>
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static phys_addr_t immrbase = -1;
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phys_addr_t get_immrbase(void)
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{
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struct device_node *soc;
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if (immrbase != -1)
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return immrbase;
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soc = of_find_node_by_type(NULL, "soc");
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if (soc != 0) {
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unsigned int size;
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void *prop = get_property(soc, "reg", &size);
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immrbase = of_translate_address(soc, prop);
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of_node_put(soc);
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};
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return immrbase;
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}
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EXPORT_SYMBOL(get_immrbase);
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static const char * gfar_tx_intr = "tx";
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static const char * gfar_rx_intr = "rx";
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static const char * gfar_err_intr = "error";
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static int __init gfar_of_init(void)
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{
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struct device_node *np;
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unsigned int i;
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struct platform_device *mdio_dev, *gfar_dev;
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struct resource res;
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int ret;
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for (np = NULL, i = 0; (np = of_find_compatible_node(np, "mdio", "gianfar")) != NULL; i++) {
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int k;
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struct device_node *child = NULL;
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struct gianfar_mdio_data mdio_data;
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memset(&res, 0, sizeof(res));
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memset(&mdio_data, 0, sizeof(mdio_data));
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ret = of_address_to_resource(np, 0, &res);
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if (ret)
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goto mdio_err;
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mdio_dev = platform_device_register_simple("fsl-gianfar_mdio", res.start, &res, 1);
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if (IS_ERR(mdio_dev)) {
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ret = PTR_ERR(mdio_dev);
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goto mdio_err;
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}
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for (k = 0; k < 32; k++)
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mdio_data.irq[k] = -1;
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while ((child = of_get_next_child(np, child)) != NULL) {
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if (child->n_intrs) {
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u32 *id = (u32 *) get_property(child, "reg", NULL);
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mdio_data.irq[*id] = child->intrs[0].line;
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}
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}
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ret = platform_device_add_data(mdio_dev, &mdio_data, sizeof(struct gianfar_mdio_data));
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if (ret)
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goto mdio_unreg;
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}
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for (np = NULL, i = 0; (np = of_find_compatible_node(np, "network", "gianfar")) != NULL; i++) {
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struct resource r[4];
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struct device_node *phy, *mdio;
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struct gianfar_platform_data gfar_data;
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unsigned int *id;
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char *model;
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void *mac_addr;
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phandle *ph;
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memset(r, 0, sizeof(r));
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memset(&gfar_data, 0, sizeof(gfar_data));
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ret = of_address_to_resource(np, 0, &r[0]);
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if (ret)
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goto gfar_err;
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r[1].start = np->intrs[0].line;
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r[1].end = np->intrs[0].line;
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r[1].flags = IORESOURCE_IRQ;
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model = get_property(np, "model", NULL);
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/* If we aren't the FEC we have multiple interrupts */
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if (model && strcasecmp(model, "FEC")) {
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r[1].name = gfar_tx_intr;
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r[2].name = gfar_rx_intr;
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r[2].start = np->intrs[1].line;
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r[2].end = np->intrs[1].line;
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r[2].flags = IORESOURCE_IRQ;
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r[3].name = gfar_err_intr;
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r[3].start = np->intrs[2].line;
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r[3].end = np->intrs[2].line;
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r[3].flags = IORESOURCE_IRQ;
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}
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gfar_dev = platform_device_register_simple("fsl-gianfar", i, &r[0], np->n_intrs + 1);
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if (IS_ERR(gfar_dev)) {
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ret = PTR_ERR(gfar_dev);
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goto gfar_err;
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}
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mac_addr = get_property(np, "address", NULL);
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memcpy(gfar_data.mac_addr, mac_addr, 6);
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if (model && !strcasecmp(model, "TSEC"))
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gfar_data.device_flags =
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FSL_GIANFAR_DEV_HAS_GIGABIT |
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FSL_GIANFAR_DEV_HAS_COALESCE |
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FSL_GIANFAR_DEV_HAS_RMON |
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FSL_GIANFAR_DEV_HAS_MULTI_INTR;
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if (model && !strcasecmp(model, "eTSEC"))
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gfar_data.device_flags =
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FSL_GIANFAR_DEV_HAS_GIGABIT |
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FSL_GIANFAR_DEV_HAS_COALESCE |
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FSL_GIANFAR_DEV_HAS_RMON |
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FSL_GIANFAR_DEV_HAS_MULTI_INTR |
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FSL_GIANFAR_DEV_HAS_CSUM |
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FSL_GIANFAR_DEV_HAS_VLAN |
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FSL_GIANFAR_DEV_HAS_EXTENDED_HASH;
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ph = (phandle *) get_property(np, "phy-handle", NULL);
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phy = of_find_node_by_phandle(*ph);
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if (phy == NULL) {
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ret = -ENODEV;
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goto gfar_unreg;
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}
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mdio = of_get_parent(phy);
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id = (u32 *) get_property(phy, "reg", NULL);
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ret = of_address_to_resource(mdio, 0, &res);
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if (ret) {
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of_node_put(phy);
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of_node_put(mdio);
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goto gfar_unreg;
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}
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gfar_data.phy_id = *id;
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gfar_data.bus_id = res.start;
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of_node_put(phy);
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of_node_put(mdio);
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ret = platform_device_add_data(gfar_dev, &gfar_data, sizeof(struct gianfar_platform_data));
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if (ret)
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goto gfar_unreg;
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}
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return 0;
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mdio_unreg:
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platform_device_unregister(mdio_dev);
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mdio_err:
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return ret;
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gfar_unreg:
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platform_device_unregister(gfar_dev);
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gfar_err:
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return ret;
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}
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arch_initcall(gfar_of_init);
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static int __init fsl_i2c_of_init(void)
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{
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struct device_node *np;
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unsigned int i;
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struct platform_device *i2c_dev;
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int ret;
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for (np = NULL, i = 0; (np = of_find_compatible_node(np, "i2c", "fsl-i2c")) != NULL; i++) {
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struct resource r[2];
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struct fsl_i2c_platform_data i2c_data;
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unsigned char * flags = NULL;
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memset(&r, 0, sizeof(r));
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memset(&i2c_data, 0, sizeof(i2c_data));
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ret = of_address_to_resource(np, 0, &r[0]);
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if (ret)
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goto i2c_err;
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r[1].start = np->intrs[0].line;
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r[1].end = np->intrs[0].line;
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r[1].flags = IORESOURCE_IRQ;
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i2c_dev = platform_device_register_simple("fsl-i2c", i, r, 2);
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if (IS_ERR(i2c_dev)) {
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ret = PTR_ERR(i2c_dev);
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goto i2c_err;
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}
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i2c_data.device_flags = 0;
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flags = get_property(np, "dfsrr", NULL);
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if (flags)
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i2c_data.device_flags |= FSL_I2C_DEV_SEPARATE_DFSRR;
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flags = get_property(np, "fsl5200-clocking", NULL);
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if (flags)
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i2c_data.device_flags |= FSL_I2C_DEV_CLOCK_5200;
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ret = platform_device_add_data(i2c_dev, &i2c_data, sizeof(struct fsl_i2c_platform_data));
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if (ret)
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goto i2c_unreg;
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}
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return 0;
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i2c_unreg:
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platform_device_unregister(i2c_dev);
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i2c_err:
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return ret;
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}
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arch_initcall(fsl_i2c_of_init);
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#ifdef CONFIG_PPC_83xx
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static int __init mpc83xx_wdt_init(void)
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{
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struct resource r;
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struct device_node *soc, *np;
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struct platform_device *dev;
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unsigned int *freq;
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int ret;
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np = of_find_compatible_node(NULL, "watchdog", "mpc83xx_wdt");
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if (!np) {
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ret = -ENODEV;
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goto mpc83xx_wdt_nodev;
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}
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soc = of_find_node_by_type(NULL, "soc");
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if (!soc) {
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ret = -ENODEV;
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goto mpc83xx_wdt_nosoc;
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}
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freq = (unsigned int *)get_property(soc, "bus-frequency", NULL);
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if (!freq) {
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ret = -ENODEV;
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goto mpc83xx_wdt_err;
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}
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memset(&r, 0, sizeof(r));
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ret = of_address_to_resource(np, 0, &r);
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if (ret)
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goto mpc83xx_wdt_err;
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dev = platform_device_register_simple("mpc83xx_wdt", 0, &r, 1);
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if (IS_ERR(dev)) {
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ret = PTR_ERR(dev);
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goto mpc83xx_wdt_err;
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}
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ret = platform_device_add_data(dev, freq, sizeof(int));
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if (ret)
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goto mpc83xx_wdt_unreg;
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of_node_put(soc);
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of_node_put(np);
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return 0;
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mpc83xx_wdt_unreg:
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platform_device_unregister(dev);
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mpc83xx_wdt_err:
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of_node_put(soc);
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mpc83xx_wdt_nosoc:
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of_node_put(np);
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mpc83xx_wdt_nodev:
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return ret;
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}
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arch_initcall(mpc83xx_wdt_init);
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#endif
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@ -0,0 +1,8 @@
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#ifndef __PPC_FSL_SOC_H
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#define __PPC_FSL_SOC_H
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#ifdef __KERNEL__
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extern phys_addr_t get_immrbase(void);
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#endif
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#endif
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