[deliverable/linux.git] / arch / powerpc / platforms / 52xx / efika.c

/*
 * Efika 5K2 platform code
 * Some code really inspired from the lite5200b platform.
 *
 * Copyright (C) 2006 bplan GmbH
 *
 * 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/errno.h>
#include <linux/kernel.h>
#include <linux/slab.h>
#include <linux/reboot.h>
#include <linux/init.h>
#include <linux/utsrelease.h>
#include <linux/seq_file.h>
#include <linux/string.h>
#include <linux/root_dev.h>
#include <linux/initrd.h>
#include <linux/timer.h>
#include <linux/pci.h>

#include <asm/io.h>
#include <asm/irq.h>
#include <asm/sections.h>
#include <asm/pci-bridge.h>
#include <asm/pgtable.h>
#include <asm/prom.h>
#include <asm/time.h>
#include <asm/machdep.h>
#include <asm/rtas.h>
#include <asm/of_device.h>
#include <asm/of_platform.h>
#include <asm/mpc52xx.h>


#define EFIKA_PLATFORM_NAME "Efika"


/* ------------------------------------------------------------------------ */
/* PCI accesses thru RTAS                                                   */
/* ------------------------------------------------------------------------ */

#ifdef CONFIG_PCI

/*
 * Access functions for PCI config space using RTAS calls.
 */
static int rtas_read_config(struct pci_bus *bus, unsigned int devfn, int offset,
			    int len, u32 * val)
{
	struct pci_controller *hose = bus->sysdata;
	unsigned long addr = (offset & 0xff) | ((devfn & 0xff) << 8)
	    | (((bus->number - hose->first_busno) & 0xff) << 16)
	    | (hose->global_number << 24);
	int ret = -1;
	int rval;

	rval = rtas_call(rtas_token("read-pci-config"), 2, 2, &ret, addr, len);
	*val = ret;
	return rval ? PCIBIOS_DEVICE_NOT_FOUND : PCIBIOS_SUCCESSFUL;
}

static int rtas_write_config(struct pci_bus *bus, unsigned int devfn,
			     int offset, int len, u32 val)
{
	struct pci_controller *hose = bus->sysdata;
	unsigned long addr = (offset & 0xff) | ((devfn & 0xff) << 8)
	    | (((bus->number - hose->first_busno) & 0xff) << 16)
	    | (hose->global_number << 24);
	int rval;

	rval = rtas_call(rtas_token("write-pci-config"), 3, 1, NULL,
			 addr, len, val);
	return rval ? PCIBIOS_DEVICE_NOT_FOUND : PCIBIOS_SUCCESSFUL;
}

static struct pci_ops rtas_pci_ops = {
	rtas_read_config,
	rtas_write_config
};


void __init efika_pcisetup(void)
{
	const int *bus_range;
	int len;
	struct pci_controller *hose;
	struct device_node *root;
	struct device_node *pcictrl;

	root = of_find_node_by_path("/");
	if (root == NULL) {
		printk(KERN_WARNING EFIKA_PLATFORM_NAME
		       ": Unable to find the root node\n");
		return;
	}

	for (pcictrl = NULL;;) {
		pcictrl = of_get_next_child(root, pcictrl);
		if ((pcictrl == NULL) || (strcmp(pcictrl->name, "pci") == 0))
			break;
	}

	of_node_put(root);

	if (pcictrl == NULL) {
		printk(KERN_WARNING EFIKA_PLATFORM_NAME
		       ": Unable to find the PCI bridge node\n");
		return;
	}

	bus_range = of_get_property(pcictrl, "bus-range", &len);
	if (bus_range == NULL || len < 2 * sizeof(int)) {
		printk(KERN_WARNING EFIKA_PLATFORM_NAME
		       ": Can't get bus-range for %s\n", pcictrl->full_name);
		return;
	}

	if (bus_range[1] == bus_range[0])
		printk(KERN_INFO EFIKA_PLATFORM_NAME ": PCI bus %d",
		       bus_range[0]);
	else
		printk(KERN_INFO EFIKA_PLATFORM_NAME ": PCI buses %d..%d",
		       bus_range[0], bus_range[1]);
	printk(" controlled by %s\n", pcictrl->full_name);
	printk("\n");

	hose = pcibios_alloc_controller(of_node_get(pcictrl));
	if (!hose) {
		printk(KERN_WARNING EFIKA_PLATFORM_NAME
		       ": Can't allocate PCI controller structure for %s\n",
		       pcictrl->full_name);
		return;
	}

	hose->first_busno = bus_range[0];
	hose->last_busno = bus_range[1];
	hose->ops = &rtas_pci_ops;

	pci_process_bridge_OF_ranges(hose, pcictrl, 0);
}

#else
void __init efika_pcisetup(void)
{}
#endif


/* ------------------------------------------------------------------------ */
/* Platform setup                                                           */
/* ------------------------------------------------------------------------ */

static void efika_show_cpuinfo(struct seq_file *m)
{
	struct device_node *root;
	const char *revision;
	const char *codegendescription;
	const char *codegenvendor;

	root = of_find_node_by_path("/");
	if (!root)
		return;

	revision = of_get_property(root, "revision", NULL);
	codegendescription = of_get_property(root, "CODEGEN,description", NULL);
	codegenvendor = of_get_property(root, "CODEGEN,vendor", NULL);

	if (codegendescription)
		seq_printf(m, "machine\t\t: %s\n", codegendescription);
	else
		seq_printf(m, "machine\t\t: Efika\n");

	if (revision)
		seq_printf(m, "revision\t: %s\n", revision);

	if (codegenvendor)
		seq_printf(m, "vendor\t\t: %s\n", codegenvendor);

	of_node_put(root);
}

#ifdef CONFIG_PM
static void efika_suspend_prepare(void __iomem *mbar)
{
	u8 pin = 4;	/* GPIO_WKUP_4 (GPIO_PSC6_0 - IRDA_RX) */
	u8 level = 1;	/* wakeup on high level */
	/* IOW. to wake it up, short pins 1 and 3 on IRDA connector */
	mpc52xx_set_wakeup_gpio(pin, level);
}
#endif

static void __init efika_setup_arch(void)
{
	rtas_initialize();

#ifdef CONFIG_BLK_DEV_INITRD
	initrd_below_start_ok = 1;

	if (initrd_start)
		ROOT_DEV = Root_RAM0;
	else
#endif
		ROOT_DEV = Root_SDA2;	/* sda2 (sda1 is for the kernel) */

	efika_pcisetup();

#ifdef CONFIG_PM
	mpc52xx_suspend.board_suspend_prepare = efika_suspend_prepare;
	mpc52xx_pm_init();
#endif

	if (ppc_md.progress)
		ppc_md.progress("Linux/PPC " UTS_RELEASE " running on Efika ;-)\n", 0x0);
}

static int __init efika_probe(void)
{
	char *model = of_get_flat_dt_prop(of_get_flat_dt_root(),
					  "model", NULL);

	if (model == NULL)
		return 0;
	if (strcmp(model, "EFIKA5K2"))
		return 0;

	ISA_DMA_THRESHOLD = ~0L;
	DMA_MODE_READ = 0x44;
	DMA_MODE_WRITE = 0x48;

	return 1;
}

define_machine(efika)
{
	.name			= EFIKA_PLATFORM_NAME,
	.probe			= efika_probe,
	.setup_arch		= efika_setup_arch,
	.init			= mpc52xx_declare_of_platform_devices,
	.show_cpuinfo		= efika_show_cpuinfo,
	.init_IRQ		= mpc52xx_init_irq,
	.get_irq		= mpc52xx_get_irq,
	.restart		= rtas_restart,
	.power_off		= rtas_power_off,
	.halt			= rtas_halt,
	.set_rtc_time		= rtas_set_rtc_time,
	.get_rtc_time		= rtas_get_rtc_time,
	.progress		= rtas_progress,
	.get_boot_time		= rtas_get_boot_time,
	.calibrate_decr		= generic_calibrate_decr,
#ifdef CONFIG_PCI
	.phys_mem_access_prot	= pci_phys_mem_access_prot,
#endif
};
Commit	Line	Data
9724b86f SM	1	/*
	2	* Efika 5K2 platform code
	3	* Some code really inspired from the lite5200b platform.
	4	*
	5	* Copyright (C) 2006 bplan GmbH
	6	*
	7	* This file is licensed under the terms of the GNU General Public License
	8	* version 2. This program is licensed "as is" without any warranty of any
	9	* kind, whether express or implied.
	10	*/
	11
	12	#include <linux/errno.h>
	13	#include <linux/kernel.h>
	14	#include <linux/slab.h>
	15	#include <linux/reboot.h>
	16	#include <linux/init.h>
	17	#include <linux/utsrelease.h>
	18	#include <linux/seq_file.h>
	19	#include <linux/string.h>
	20	#include <linux/root_dev.h>
	21	#include <linux/initrd.h>
	22	#include <linux/timer.h>
	23	#include <linux/pci.h>
	24
	25	#include <asm/io.h>
	26	#include <asm/irq.h>
	27	#include <asm/sections.h>
	28	#include <asm/pci-bridge.h>
	29	#include <asm/pgtable.h>
	30	#include <asm/prom.h>
	31	#include <asm/time.h>
	32	#include <asm/machdep.h>
	33	#include <asm/rtas.h>
	34	#include <asm/of_device.h>
	35	#include <asm/of_platform.h>
	36	#include <asm/mpc52xx.h>
	37
	38
	39	#define EFIKA_PLATFORM_NAME "Efika"
	40
	41
	42	/* ------------------------------------------------------------------------ */
	43	/* PCI accesses thru RTAS */
	44	/* ------------------------------------------------------------------------ */
	45
	46	#ifdef CONFIG_PCI
	47
	48	/*
	49	* Access functions for PCI config space using RTAS calls.
	50	*/
	51	static int rtas_read_config(struct pci_bus *bus, unsigned int devfn, int offset,
	52	int len, u32 * val)
	53	{
	54	struct pci_controller *hose = bus->sysdata;
	55	unsigned long addr = (offset & 0xff) \| ((devfn & 0xff) << 8)
	56	\| (((bus->number - hose->first_busno) & 0xff) << 16)
5516b540	57	\| (hose->global_number << 24);
9724b86f SM	58	int ret = -1;
	59	int rval;
	60
	61	rval = rtas_call(rtas_token("read-pci-config"), 2, 2, &ret, addr, len);
	62	*val = ret;
	63	return rval ? PCIBIOS_DEVICE_NOT_FOUND : PCIBIOS_SUCCESSFUL;
	64	}
	65
	66	static int rtas_write_config(struct pci_bus *bus, unsigned int devfn,
	67	int offset, int len, u32 val)
	68	{
	69	struct pci_controller *hose = bus->sysdata;
	70	unsigned long addr = (offset & 0xff) \| ((devfn & 0xff) << 8)
	71	\| (((bus->number - hose->first_busno) & 0xff) << 16)
5516b540	72	\| (hose->global_number << 24);
9724b86f SM	73	int rval;
	74
	75	rval = rtas_call(rtas_token("write-pci-config"), 3, 1, NULL,
	76	addr, len, val);
	77	return rval ? PCIBIOS_DEVICE_NOT_FOUND : PCIBIOS_SUCCESSFUL;
	78	}
	79
	80	static struct pci_ops rtas_pci_ops = {
	81	rtas_read_config,
	82	rtas_write_config
	83	};
	84
	85
	86	void __init efika_pcisetup(void)
	87	{
	88	const int *bus_range;
	89	int len;
	90	struct pci_controller *hose;
	91	struct device_node *root;
	92	struct device_node *pcictrl;
	93
	94	root = of_find_node_by_path("/");
	95	if (root == NULL) {
	96	printk(KERN_WARNING EFIKA_PLATFORM_NAME
	97	": Unable to find the root node\n");
	98	return;
	99	}
	100
	101	for (pcictrl = NULL;;) {
	102	pcictrl = of_get_next_child(root, pcictrl);
	103	if ((pcictrl == NULL) \|\| (strcmp(pcictrl->name, "pci") == 0))
	104	break;
	105	}
	106
	107	of_node_put(root);
	108
	109	if (pcictrl == NULL) {
	110	printk(KERN_WARNING EFIKA_PLATFORM_NAME
	111	": Unable to find the PCI bridge node\n");
	112	return;
	113	}
	114
e2eb6392	115	bus_range = of_get_property(pcictrl, "bus-range", &len);
9724b86f SM	116	if (bus_range == NULL \|\| len < 2 * sizeof(int)) {
	117	printk(KERN_WARNING EFIKA_PLATFORM_NAME
	118	": Can't get bus-range for %s\n", pcictrl->full_name);
	119	return;
	120	}
	121
	122	if (bus_range[1] == bus_range[0])
	123	printk(KERN_INFO EFIKA_PLATFORM_NAME ": PCI bus %d",
	124	bus_range[0]);
	125	else
	126	printk(KERN_INFO EFIKA_PLATFORM_NAME ": PCI buses %d..%d",
	127	bus_range[0], bus_range[1]);
	128	printk(" controlled by %s\n", pcictrl->full_name);
	129	printk("\n");
	130
dbf8471f	131	hose = pcibios_alloc_controller(of_node_get(pcictrl));
9724b86f SM	132	if (!hose) {
	133	printk(KERN_WARNING EFIKA_PLATFORM_NAME
	134	": Can't allocate PCI controller structure for %s\n",
	135	pcictrl->full_name);
	136	return;
	137	}
	138
9724b86f SM	139	hose->first_busno = bus_range[0];
	140	hose->last_busno = bus_range[1];
	141	hose->ops = &rtas_pci_ops;
	142
	143	pci_process_bridge_OF_ranges(hose, pcictrl, 0);
	144	}
	145
	146	#else
	147	void __init efika_pcisetup(void)
	148	{}
	149	#endif
	150
	151
	152
	153	/* ------------------------------------------------------------------------ */
	154	/* Platform setup */
	155	/* ------------------------------------------------------------------------ */
	156
	157	static void efika_show_cpuinfo(struct seq_file *m)
	158	{
	159	struct device_node *root;
e2eb6392 SR	160	const char *revision;
	161	const char *codegendescription;
	162	const char *codegenvendor;
9724b86f SM	163
	164	root = of_find_node_by_path("/");
	165	if (!root)
	166	return;
	167
e2eb6392 SR	168	revision = of_get_property(root, "revision", NULL);
	169	codegendescription = of_get_property(root, "CODEGEN,description", NULL);
	170	codegenvendor = of_get_property(root, "CODEGEN,vendor", NULL);
9724b86f SM	171
	172	if (codegendescription)
	173	seq_printf(m, "machine\t\t: %s\n", codegendescription);
	174	else
	175	seq_printf(m, "machine\t\t: Efika\n");
	176
	177	if (revision)
	178	seq_printf(m, "revision\t: %s\n", revision);
	179
	180	if (codegenvendor)
	181	seq_printf(m, "vendor\t\t: %s\n", codegenvendor);
	182
	183	of_node_put(root);
	184	}
	185
2e1ee1f7 DP	186	#ifdef CONFIG_PM
	187	static void efika_suspend_prepare(void __iomem *mbar)
	188	{
	189	u8 pin = 4; /* GPIO_WKUP_4 (GPIO_PSC6_0 - IRDA_RX) */
	190	u8 level = 1; /* wakeup on high level */
	191	/* IOW. to wake it up, short pins 1 and 3 on IRDA connector */
	192	mpc52xx_set_wakeup_gpio(pin, level);
	193	}
	194	#endif
	195
9724b86f SM	196	static void __init efika_setup_arch(void)
	197	{
	198	rtas_initialize();
	199
	200	#ifdef CONFIG_BLK_DEV_INITRD
	201	initrd_below_start_ok = 1;
	202
	203	if (initrd_start)
	204	ROOT_DEV = Root_RAM0;
	205	else
	206	#endif
	207	ROOT_DEV = Root_SDA2; /* sda2 (sda1 is for the kernel) */
	208
	209	efika_pcisetup();
	210
2e1ee1f7 DP	211	#ifdef CONFIG_PM
	212	mpc52xx_suspend.board_suspend_prepare = efika_suspend_prepare;
	213	mpc52xx_pm_init();
	214	#endif
	215
9724b86f SM	216	if (ppc_md.progress)
	217	ppc_md.progress("Linux/PPC " UTS_RELEASE " running on Efika ;-)\n", 0x0);
	218	}
	219
	220	static int __init efika_probe(void)
	221	{
	222	char *model = of_get_flat_dt_prop(of_get_flat_dt_root(),
	223	"model", NULL);
	224
	225	if (model == NULL)
	226	return 0;
	227	if (strcmp(model, "EFIKA5K2"))
	228	return 0;
	229
	230	ISA_DMA_THRESHOLD = ~0L;
	231	DMA_MODE_READ = 0x44;
	232	DMA_MODE_WRITE = 0x48;
	233
	234	return 1;
	235	}
	236
	237	define_machine(efika)
	238	{
	239	.name = EFIKA_PLATFORM_NAME,
	240	.probe = efika_probe,
	241	.setup_arch = efika_setup_arch,
	242	.init = mpc52xx_declare_of_platform_devices,
	243	.show_cpuinfo = efika_show_cpuinfo,
	244	.init_IRQ = mpc52xx_init_irq,
	245	.get_irq = mpc52xx_get_irq,
	246	.restart = rtas_restart,
	247	.power_off = rtas_power_off,
	248	.halt = rtas_halt,
	249	.set_rtc_time = rtas_set_rtc_time,
	250	.get_rtc_time = rtas_get_rtc_time,
	251	.progress = rtas_progress,
	252	.get_boot_time = rtas_get_boot_time,
	253	.calibrate_decr = generic_calibrate_decr,
d6658408	254	#ifdef CONFIG_PCI
9724b86f	255	.phys_mem_access_prot = pci_phys_mem_access_prot,
d6658408	256	#endif
9724b86f SM	257	};
9724b86f SM	258