[mirror_ubuntu-jammy-kernel.git] / drivers / parisc / lasi.c

// SPDX-License-Identifier: GPL-2.0-or-later
/*
 *	LASI Device Driver
 *
 *	(c) Copyright 1999 Red Hat Software
 *	Portions (c) Copyright 1999 The Puffin Group Inc.
 *	Portions (c) Copyright 1999 Hewlett-Packard
 *
 *	by Alan Cox <alan@redhat.com> and 
 * 	   Alex deVries <alex@onefishtwo.ca>
 */

#include <linux/errno.h>
#include <linux/init.h>
#include <linux/interrupt.h>
#include <linux/slab.h>
#include <linux/module.h>
#include <linux/pm.h>
#include <linux/types.h>

#include <asm/io.h>
#include <asm/hardware.h>
#include <asm/led.h>

#include "gsc.h"


#define LASI_VER	0xC008	/* LASI Version */

#define LASI_IO_CONF	0x7FFFE	/* LASI primary configuration register */
#define LASI_IO_CONF2	0x7FFFF	/* LASI secondary configuration register */

static void lasi_choose_irq(struct parisc_device *dev, void *ctrl)
{
	int irq;

	switch (dev->id.sversion) {
		case 0x74:	irq =  7; break; /* Centronics */
		case 0x7B:	irq = 13; break; /* Audio */
		case 0x81:	irq = 14; break; /* Lasi itself */
		case 0x82:	irq =  9; break; /* SCSI */
		case 0x83:	irq = 20; break; /* Floppy */
		case 0x84:	irq = 26; break; /* PS/2 Keyboard */
		case 0x87:	irq = 18; break; /* ISDN */
		case 0x8A:	irq =  8; break; /* LAN */
		case 0x8C:	irq =  5; break; /* RS232 */
		case 0x8D:	irq = (dev->hw_path == 13) ? 16 : 17; break;
						 /* Telephone */
		default: 	return;		 /* unknown */
	}

	gsc_asic_assign_irq(ctrl, irq, &dev->irq);
}

static void __init
lasi_init_irq(struct gsc_asic *this_lasi)
{
	unsigned long lasi_base = this_lasi->hpa;

	/* Stop LASI barking for a bit */
	gsc_writel(0x00000000, lasi_base+OFFSET_IMR);

	/* clear pending interrupts */
	gsc_readl(lasi_base+OFFSET_IRR);

	/* We're not really convinced we want to reset the onboard
         * devices. Firmware does it for us...
	 */

	/* Resets */
	/* gsc_writel(0xFFFFFFFF, lasi_base+0x2000);*/	/* Parallel */
	if(pdc_add_valid(lasi_base+0x4004) == PDC_OK)
		gsc_writel(0xFFFFFFFF, lasi_base+0x4004);	/* Audio */
	/* gsc_writel(0xFFFFFFFF, lasi_base+0x5000);*/	/* Serial */ 
	/* gsc_writel(0xFFFFFFFF, lasi_base+0x6000);*/	/* SCSI */
	gsc_writel(0xFFFFFFFF, lasi_base+0x7000);	/* LAN */
	gsc_writel(0xFFFFFFFF, lasi_base+0x8000);	/* Keyboard */
	gsc_writel(0xFFFFFFFF, lasi_base+0xA000);	/* FDC */
	
	/* Ok we hit it on the head with a hammer, our Dog is now
	** comatose and muzzled.  Devices will now unmask LASI
	** interrupts as they are registered as irq's in the LASI range.
	*/
	/* XXX: I thought it was `awks that got `it on the `ead with an
	 * `ammer.  -- willy
	 */
}


/*
   ** lasi_led_init()
   ** 
   ** lasi_led_init() initializes the LED controller on the LASI.
   **
   ** Since Mirage and Electra machines use a different LED
   ** address register, we need to check for these machines 
   ** explicitly.
 */

#ifndef CONFIG_CHASSIS_LCD_LED

#define lasi_led_init(x)	/* nothing */

#else

static void __init lasi_led_init(unsigned long lasi_hpa)
{
	unsigned long datareg;

	switch (CPU_HVERSION) {
	/* Gecko machines have only one single LED, which can be permanently 
	   turned on by writing a zero into the power control register. */ 
	case 0x600:		/* Gecko (712/60) */
	case 0x601:		/* Gecko (712/80) */
	case 0x602:		/* Gecko (712/100) */
	case 0x603:		/* Anole 64 (743/64) */
	case 0x604:		/* Anole 100 (743/100) */
	case 0x605:		/* Gecko (712/120) */
		datareg = lasi_hpa + 0x0000C000;
		gsc_writeb(0, datareg);
		return; /* no need to register the LED interrupt-function */  

	/* Mirage and Electra machines need special offsets */
	case 0x60A:		/* Mirage Jr (715/64) */
	case 0x60B:		/* Mirage 100 */
	case 0x60C:		/* Mirage 100+ */
	case 0x60D:		/* Electra 100 */
	case 0x60E:		/* Electra 120 */
		datareg = lasi_hpa - 0x00020000;
		break;

	default:
		datareg = lasi_hpa + 0x0000C000;
		break;
	}

	register_led_driver(DISPLAY_MODEL_LASI, LED_CMD_REG_NONE, datareg);
}
#endif

/*
 * lasi_power_off
 *
 * Function for lasi to turn off the power.  This is accomplished by setting a
 * 1 to PWR_ON_L in the Power Control Register
 * 
 */

static unsigned long lasi_power_off_hpa __read_mostly;

static void lasi_power_off(void)
{
	unsigned long datareg;

	/* calculate addr of the Power Control Register */
	datareg = lasi_power_off_hpa + 0x0000C000;

	/* Power down the machine */
	gsc_writel(0x02, datareg);
}

static int __init lasi_init_chip(struct parisc_device *dev)
{
	extern void (*chassis_power_off)(void);
	struct gsc_asic *lasi;
	int ret;

	lasi = kzalloc(sizeof(*lasi), GFP_KERNEL);
	if (!lasi)
		return -ENOMEM;

	lasi->name = "Lasi";
	lasi->hpa = dev->hpa.start;

	/* Check the 4-bit (yes, only 4) version register */
	lasi->version = gsc_readl(lasi->hpa + LASI_VER) & 0xf;
	printk(KERN_INFO "%s version %d at 0x%lx found.\n",
		lasi->name, lasi->version, lasi->hpa);

	/* initialize the chassis LEDs really early */ 
	lasi_led_init(lasi->hpa);

	/* Stop LASI barking for a bit */
	lasi_init_irq(lasi);

	/* the IRQ lasi should use */
	dev->irq = gsc_alloc_irq(&lasi->gsc_irq);
	if (dev->irq < 0) {
		printk(KERN_ERR "%s(): cannot get GSC irq\n",
				__func__);
		kfree(lasi);
		return -EBUSY;
	}

	lasi->eim = ((u32) lasi->gsc_irq.txn_addr) | lasi->gsc_irq.txn_data;

	ret = request_irq(lasi->gsc_irq.irq, gsc_asic_intr, 0, "lasi", lasi);
	if (ret < 0) {
		kfree(lasi);
		return ret;
	}

	/* enable IRQ's for devices below LASI */
	gsc_writel(lasi->eim, lasi->hpa + OFFSET_IAR);

	/* Done init'ing, register this driver */
	ret = gsc_common_setup(dev, lasi);
	if (ret) {
		kfree(lasi);
		return ret;
	}    

	gsc_fixup_irqs(dev, lasi, lasi_choose_irq);

	/* initialize the power off function */
	/* FIXME: Record the LASI HPA for the power off function.  This should
	 * ensure that only the first LASI (the one controlling the power off)
	 * should set the HPA here */
	lasi_power_off_hpa = lasi->hpa;
	chassis_power_off = lasi_power_off;
	
	return ret;
}

static struct parisc_device_id lasi_tbl[] __initdata = {
	{ HPHW_BA, HVERSION_REV_ANY_ID, HVERSION_ANY_ID, 0x00081 },
	{ 0, }
};

struct parisc_driver lasi_driver __refdata = {
	.name =		"lasi",
	.id_table =	lasi_tbl,
	.probe =	lasi_init_chip,
};
Commit	Line	Data
2874c5fd	1	// SPDX-License-Identifier: GPL-2.0-or-later
1da177e4 LT	2	/*
	3	* LASI Device Driver
	4	*
	5	* (c) Copyright 1999 Red Hat Software
	6	* Portions (c) Copyright 1999 The Puffin Group Inc.
	7	* Portions (c) Copyright 1999 Hewlett-Packard
	8	*
1da177e4 LT	9	* by Alan Cox <alan@redhat.com> and
	10	* Alex deVries <alex@onefishtwo.ca>
	11	*/
	12
	13	#include <linux/errno.h>
	14	#include <linux/init.h>
	15	#include <linux/interrupt.h>
	16	#include <linux/slab.h>
	17	#include <linux/module.h>
	18	#include <linux/pm.h>
1da177e4 LT	19	#include <linux/types.h>
	20
	21	#include <asm/io.h>
	22	#include <asm/hardware.h>
	23	#include <asm/led.h>
	24
	25	#include "gsc.h"
	26
	27
	28	#define LASI_VER 0xC008 /* LASI Version */
	29
	30	#define LASI_IO_CONF 0x7FFFE /* LASI primary configuration register */
	31	#define LASI_IO_CONF2 0x7FFFF /* LASI secondary configuration register */
	32
	33	static void lasi_choose_irq(struct parisc_device dev, void ctrl)
	34	{
	35	int irq;
	36
	37	switch (dev->id.sversion) {
	38	case 0x74: irq = 7; break; /* Centronics */
	39	case 0x7B: irq = 13; break; /* Audio */
	40	case 0x81: irq = 14; break; /* Lasi itself */
	41	case 0x82: irq = 9; break; /* SCSI */
	42	case 0x83: irq = 20; break; /* Floppy */
	43	case 0x84: irq = 26; break; /* PS/2 Keyboard */
	44	case 0x87: irq = 18; break; /* ISDN */
	45	case 0x8A: irq = 8; break; /* LAN */
	46	case 0x8C: irq = 5; break; /* RS232 */
	47	case 0x8D: irq = (dev->hw_path == 13) ? 16 : 17; break;
	48	/* Telephone */
	49	default: return; /* unknown */
	50	}
	51
	52	gsc_asic_assign_irq(ctrl, irq, &dev->irq);
	53	}
	54
	55	static void __init
	56	lasi_init_irq(struct gsc_asic *this_lasi)
	57	{
	58	unsigned long lasi_base = this_lasi->hpa;
	59
	60	/* Stop LASI barking for a bit */
	61	gsc_writel(0x00000000, lasi_base+OFFSET_IMR);
	62
	63	/* clear pending interrupts */
	64	gsc_readl(lasi_base+OFFSET_IRR);
	65
	66	/* We're not really convinced we want to reset the onboard
	67	* devices. Firmware does it for us...
	68	*/
	69
	70	/* Resets */
	71	/* gsc_writel(0xFFFFFFFF, lasi_base+0x2000);/ / Parallel */
	72	if(pdc_add_valid(lasi_base+0x4004) == PDC_OK)
	73	gsc_writel(0xFFFFFFFF, lasi_base+0x4004); /* Audio */
	74	/* gsc_writel(0xFFFFFFFF, lasi_base+0x5000);/ / Serial */
	75	/* gsc_writel(0xFFFFFFFF, lasi_base+0x6000);/ / SCSI */
	76	gsc_writel(0xFFFFFFFF, lasi_base+0x7000); /* LAN */
	77	gsc_writel(0xFFFFFFFF, lasi_base+0x8000); /* Keyboard */
	78	gsc_writel(0xFFFFFFFF, lasi_base+0xA000); /* FDC */
	79
	80	/* Ok we hit it on the head with a hammer, our Dog is now
	81	** comatose and muzzled. Devices will now unmask LASI
	82	** interrupts as they are registered as irq's in the LASI range.
83	*/
84	/* XXX: I thought it was `awks that got `it on the `ead with an
85	* `ammer. -- willy
86	*/
87	}
88
89
90	/*
91	** lasi_led_init()
92	**
93	** lasi_led_init() initializes the LED controller on the LASI.
94	**
95	** Since Mirage and Electra machines use a different LED
96	** address register, we need to check for these machines
97	** explicitly.
98	*/
99
100	#ifndef CONFIG_CHASSIS_LCD_LED
101
102	#define lasi_led_init(x) /* nothing */
103
104	#else
105
df8e5bc6	106	static void __init lasi_led_init(unsigned long lasi_hpa)
1da177e4 LT	107	{
	108	unsigned long datareg;
	109
	110	switch (CPU_HVERSION) {
	111	/* Gecko machines have only one single LED, which can be permanently
	112	turned on by writing a zero into the power control register. */
	113	case 0x600: /* Gecko (712/60) */
	114	case 0x601: /* Gecko (712/80) */
	115	case 0x602: /* Gecko (712/100) */
	116	case 0x603: /* Anole 64 (743/64) */
	117	case 0x604: /* Anole 100 (743/100) */
	118	case 0x605: /* Gecko (712/120) */
	119	datareg = lasi_hpa + 0x0000C000;
	120	gsc_writeb(0, datareg);
	121	return; /* no need to register the LED interrupt-function */
	122
	123	/* Mirage and Electra machines need special offsets */
	124	case 0x60A: /* Mirage Jr (715/64) */
	125	case 0x60B: /* Mirage 100 */
	126	case 0x60C: /* Mirage 100+ */
	127	case 0x60D: /* Electra 100 */
	128	case 0x60E: /* Electra 120 */
	129	datareg = lasi_hpa - 0x00020000;
	130	break;
	131
	132	default:
	133	datareg = lasi_hpa + 0x0000C000;
	134	break;
	135	}
	136
	137	register_led_driver(DISPLAY_MODEL_LASI, LED_CMD_REG_NONE, datareg);
	138	}
	139	#endif
	140
	141	/*
	142	* lasi_power_off
	143	*
	144	* Function for lasi to turn off the power. This is accomplished by setting a
	145	* 1 to PWR_ON_L in the Power Control Register
	146	*
	147	*/
	148
8039de10	149	static unsigned long lasi_power_off_hpa __read_mostly;
1da177e4 LT	150
	151	static void lasi_power_off(void)
	152	{
	153	unsigned long datareg;
	154
	155	/* calculate addr of the Power Control Register */
	156	datareg = lasi_power_off_hpa + 0x0000C000;
	157
	158	/* Power down the machine */
	159	gsc_writel(0x02, datareg);
	160	}
	161
df8e5bc6	162	static int __init lasi_init_chip(struct parisc_device *dev)
1da177e4	163	{
85509c00	164	extern void (*chassis_power_off)(void);
1da177e4	165	struct gsc_asic *lasi;
1da177e4 LT	166	int ret;
1da177e4 LT	167
cb6fc18e	168	lasi = kzalloc(sizeof(*lasi), GFP_KERNEL);
1da177e4 LT	169	if (!lasi)
	170	return -ENOMEM;
	171
	172	lasi->name = "Lasi";
53f01bba	173	lasi->hpa = dev->hpa.start;
1da177e4 LT	174
	175	/* Check the 4-bit (yes, only 4) version register */
	176	lasi->version = gsc_readl(lasi->hpa + LASI_VER) & 0xf;
	177	printk(KERN_INFO "%s version %d at 0x%lx found.\n",
	178	lasi->name, lasi->version, lasi->hpa);
	179
	180	/* initialize the chassis LEDs really early */
	181	lasi_led_init(lasi->hpa);
	182
	183	/* Stop LASI barking for a bit */
	184	lasi_init_irq(lasi);
	185
	186	/* the IRQ lasi should use */
c41dd51d	187	dev->irq = gsc_alloc_irq(&lasi->gsc_irq);
1da177e4 LT	188	if (dev->irq < 0) {
1da177e4 LT	189	printk(KERN_ERR "%s(): cannot get GSC irq\n",
a8043ecb	190	__func__);
1da177e4 LT	191	kfree(lasi);
	192	return -EBUSY;
	193	}
	194
c41dd51d	195	lasi->eim = ((u32) lasi->gsc_irq.txn_addr) \| lasi->gsc_irq.txn_data;
1da177e4	196
c41dd51d	197	ret = request_irq(lasi->gsc_irq.irq, gsc_asic_intr, 0, "lasi", lasi);
1da177e4 LT	198	if (ret < 0) {
	199	kfree(lasi);
	200	return ret;
	201	}
	202
	203	/* enable IRQ's for devices below LASI */
	204	gsc_writel(lasi->eim, lasi->hpa + OFFSET_IAR);
	205
	206	/* Done init'ing, register this driver */
	207	ret = gsc_common_setup(dev, lasi);
	208	if (ret) {
	209	kfree(lasi);
	210	return ret;
	211	}
	212
	213	gsc_fixup_irqs(dev, lasi, lasi_choose_irq);
	214
	215	/* initialize the power off function */
	216	/* FIXME: Record the LASI HPA for the power off function. This should
	217	* ensure that only the first LASI (the one controlling the power off)
	218	* should set the HPA here */
	219	lasi_power_off_hpa = lasi->hpa;
85509c00	220	chassis_power_off = lasi_power_off;
1da177e4 LT	221
	222	return ret;
	223	}
	224
cfe4fbfb	225	static struct parisc_device_id lasi_tbl[] __initdata = {
1da177e4 LT	226	{ HPHW_BA, HVERSION_REV_ANY_ID, HVERSION_ANY_ID, 0x00081 },
	227	{ 0, }
	228	};
	229
cfe4fbfb	230	struct parisc_driver lasi_driver __refdata = {
bdad1f83	231	.name = "lasi",
1da177e4 LT	232	.id_table = lasi_tbl,
	233	.probe = lasi_init_chip,
	234	};