// SPDX-License-Identifier: GPL-2.0-only
|
/*
|
* Driver for PC-speaker like devices found on various Sparc systems.
|
*
|
* Copyright (c) 2002 Vojtech Pavlik
|
* Copyright (c) 2002, 2006, 2008 David S. Miller (davem@davemloft.net)
|
*/
|
#include <linux/kernel.h>
|
#include <linux/module.h>
|
#include <linux/init.h>
|
#include <linux/input.h>
|
#include <linux/of_device.h>
|
#include <linux/slab.h>
|
|
#include <asm/io.h>
|
|
MODULE_AUTHOR("David S. Miller <davem@davemloft.net>");
|
MODULE_DESCRIPTION("Sparc Speaker beeper driver");
|
MODULE_LICENSE("GPL");
|
|
struct grover_beep_info {
|
void __iomem *freq_regs;
|
void __iomem *enable_reg;
|
};
|
|
struct bbc_beep_info {
|
u32 clock_freq;
|
void __iomem *regs;
|
};
|
|
struct sparcspkr_state {
|
const char *name;
|
int (*event)(struct input_dev *dev, unsigned int type, unsigned int code, int value);
|
spinlock_t lock;
|
struct input_dev *input_dev;
|
union {
|
struct grover_beep_info grover;
|
struct bbc_beep_info bbc;
|
} u;
|
};
|
|
static u32 bbc_count_to_reg(struct bbc_beep_info *info, unsigned int count)
|
{
|
u32 val, clock_freq = info->clock_freq;
|
int i;
|
|
if (!count)
|
return 0;
|
|
if (count <= clock_freq >> 20)
|
return 1 << 18;
|
|
if (count >= clock_freq >> 12)
|
return 1 << 10;
|
|
val = 1 << 18;
|
for (i = 19; i >= 11; i--) {
|
val >>= 1;
|
if (count <= clock_freq >> i)
|
break;
|
}
|
|
return val;
|
}
|
|
static int bbc_spkr_event(struct input_dev *dev, unsigned int type, unsigned int code, int value)
|
{
|
struct sparcspkr_state *state = dev_get_drvdata(dev->dev.parent);
|
struct bbc_beep_info *info = &state->u.bbc;
|
unsigned int count = 0;
|
unsigned long flags;
|
|
if (type != EV_SND)
|
return -1;
|
|
switch (code) {
|
case SND_BELL: if (value) value = 1000;
|
case SND_TONE: break;
|
default: return -1;
|
}
|
|
if (value > 20 && value < 32767)
|
count = 1193182 / value;
|
|
count = bbc_count_to_reg(info, count);
|
|
spin_lock_irqsave(&state->lock, flags);
|
|
if (count) {
|
sbus_writeb(0x01, info->regs + 0);
|
sbus_writeb(0x00, info->regs + 2);
|
sbus_writeb((count >> 16) & 0xff, info->regs + 3);
|
sbus_writeb((count >> 8) & 0xff, info->regs + 4);
|
sbus_writeb(0x00, info->regs + 5);
|
} else {
|
sbus_writeb(0x00, info->regs + 0);
|
}
|
|
spin_unlock_irqrestore(&state->lock, flags);
|
|
return 0;
|
}
|
|
static int grover_spkr_event(struct input_dev *dev, unsigned int type, unsigned int code, int value)
|
{
|
struct sparcspkr_state *state = dev_get_drvdata(dev->dev.parent);
|
struct grover_beep_info *info = &state->u.grover;
|
unsigned int count = 0;
|
unsigned long flags;
|
|
if (type != EV_SND)
|
return -1;
|
|
switch (code) {
|
case SND_BELL: if (value) value = 1000;
|
case SND_TONE: break;
|
default: return -1;
|
}
|
|
if (value > 20 && value < 32767)
|
count = 1193182 / value;
|
|
spin_lock_irqsave(&state->lock, flags);
|
|
if (count) {
|
/* enable counter 2 */
|
sbus_writeb(sbus_readb(info->enable_reg) | 3, info->enable_reg);
|
/* set command for counter 2, 2 byte write */
|
sbus_writeb(0xB6, info->freq_regs + 1);
|
/* select desired HZ */
|
sbus_writeb(count & 0xff, info->freq_regs + 0);
|
sbus_writeb((count >> 8) & 0xff, info->freq_regs + 0);
|
} else {
|
/* disable counter 2 */
|
sbus_writeb(sbus_readb(info->enable_reg) & 0xFC, info->enable_reg);
|
}
|
|
spin_unlock_irqrestore(&state->lock, flags);
|
|
return 0;
|
}
|
|
static int sparcspkr_probe(struct device *dev)
|
{
|
struct sparcspkr_state *state = dev_get_drvdata(dev);
|
struct input_dev *input_dev;
|
int error;
|
|
input_dev = input_allocate_device();
|
if (!input_dev)
|
return -ENOMEM;
|
|
input_dev->name = state->name;
|
input_dev->phys = "sparc/input0";
|
input_dev->id.bustype = BUS_ISA;
|
input_dev->id.vendor = 0x001f;
|
input_dev->id.product = 0x0001;
|
input_dev->id.version = 0x0100;
|
input_dev->dev.parent = dev;
|
|
input_dev->evbit[0] = BIT_MASK(EV_SND);
|
input_dev->sndbit[0] = BIT_MASK(SND_BELL) | BIT_MASK(SND_TONE);
|
|
input_dev->event = state->event;
|
|
error = input_register_device(input_dev);
|
if (error) {
|
input_free_device(input_dev);
|
return error;
|
}
|
|
state->input_dev = input_dev;
|
|
return 0;
|
}
|
|
static void sparcspkr_shutdown(struct platform_device *dev)
|
{
|
struct sparcspkr_state *state = platform_get_drvdata(dev);
|
struct input_dev *input_dev = state->input_dev;
|
|
/* turn off the speaker */
|
state->event(input_dev, EV_SND, SND_BELL, 0);
|
}
|
|
static int bbc_beep_probe(struct platform_device *op)
|
{
|
struct sparcspkr_state *state;
|
struct bbc_beep_info *info;
|
struct device_node *dp;
|
int err = -ENOMEM;
|
|
state = kzalloc(sizeof(*state), GFP_KERNEL);
|
if (!state)
|
goto out_err;
|
|
state->name = "Sparc BBC Speaker";
|
state->event = bbc_spkr_event;
|
spin_lock_init(&state->lock);
|
|
dp = of_find_node_by_path("/");
|
err = -ENODEV;
|
if (!dp)
|
goto out_free;
|
|
info = &state->u.bbc;
|
info->clock_freq = of_getintprop_default(dp, "clock-frequency", 0);
|
of_node_put(dp);
|
if (!info->clock_freq)
|
goto out_free;
|
|
info->regs = of_ioremap(&op->resource[0], 0, 6, "bbc beep");
|
if (!info->regs)
|
goto out_free;
|
|
platform_set_drvdata(op, state);
|
|
err = sparcspkr_probe(&op->dev);
|
if (err)
|
goto out_clear_drvdata;
|
|
return 0;
|
|
out_clear_drvdata:
|
of_iounmap(&op->resource[0], info->regs, 6);
|
|
out_free:
|
kfree(state);
|
out_err:
|
return err;
|
}
|
|
static int bbc_remove(struct platform_device *op)
|
{
|
struct sparcspkr_state *state = platform_get_drvdata(op);
|
struct input_dev *input_dev = state->input_dev;
|
struct bbc_beep_info *info = &state->u.bbc;
|
|
/* turn off the speaker */
|
state->event(input_dev, EV_SND, SND_BELL, 0);
|
|
input_unregister_device(input_dev);
|
|
of_iounmap(&op->resource[0], info->regs, 6);
|
|
kfree(state);
|
|
return 0;
|
}
|
|
static const struct of_device_id bbc_beep_match[] = {
|
{
|
.name = "beep",
|
.compatible = "SUNW,bbc-beep",
|
},
|
{},
|
};
|
MODULE_DEVICE_TABLE(of, bbc_beep_match);
|
|
static struct platform_driver bbc_beep_driver = {
|
.driver = {
|
.name = "bbcbeep",
|
.of_match_table = bbc_beep_match,
|
},
|
.probe = bbc_beep_probe,
|
.remove = bbc_remove,
|
.shutdown = sparcspkr_shutdown,
|
};
|
|
static int grover_beep_probe(struct platform_device *op)
|
{
|
struct sparcspkr_state *state;
|
struct grover_beep_info *info;
|
int err = -ENOMEM;
|
|
state = kzalloc(sizeof(*state), GFP_KERNEL);
|
if (!state)
|
goto out_err;
|
|
state->name = "Sparc Grover Speaker";
|
state->event = grover_spkr_event;
|
spin_lock_init(&state->lock);
|
|
info = &state->u.grover;
|
info->freq_regs = of_ioremap(&op->resource[2], 0, 2, "grover beep freq");
|
if (!info->freq_regs)
|
goto out_free;
|
|
info->enable_reg = of_ioremap(&op->resource[3], 0, 1, "grover beep enable");
|
if (!info->enable_reg)
|
goto out_unmap_freq_regs;
|
|
platform_set_drvdata(op, state);
|
|
err = sparcspkr_probe(&op->dev);
|
if (err)
|
goto out_clear_drvdata;
|
|
return 0;
|
|
out_clear_drvdata:
|
of_iounmap(&op->resource[3], info->enable_reg, 1);
|
|
out_unmap_freq_regs:
|
of_iounmap(&op->resource[2], info->freq_regs, 2);
|
out_free:
|
kfree(state);
|
out_err:
|
return err;
|
}
|
|
static int grover_remove(struct platform_device *op)
|
{
|
struct sparcspkr_state *state = platform_get_drvdata(op);
|
struct grover_beep_info *info = &state->u.grover;
|
struct input_dev *input_dev = state->input_dev;
|
|
/* turn off the speaker */
|
state->event(input_dev, EV_SND, SND_BELL, 0);
|
|
input_unregister_device(input_dev);
|
|
of_iounmap(&op->resource[3], info->enable_reg, 1);
|
of_iounmap(&op->resource[2], info->freq_regs, 2);
|
|
kfree(state);
|
|
return 0;
|
}
|
|
static const struct of_device_id grover_beep_match[] = {
|
{
|
.name = "beep",
|
.compatible = "SUNW,smbus-beep",
|
},
|
{},
|
};
|
MODULE_DEVICE_TABLE(of, grover_beep_match);
|
|
static struct platform_driver grover_beep_driver = {
|
.driver = {
|
.name = "groverbeep",
|
.of_match_table = grover_beep_match,
|
},
|
.probe = grover_beep_probe,
|
.remove = grover_remove,
|
.shutdown = sparcspkr_shutdown,
|
};
|
|
static struct platform_driver * const drivers[] = {
|
&bbc_beep_driver,
|
&grover_beep_driver,
|
};
|
|
static int __init sparcspkr_init(void)
|
{
|
return platform_register_drivers(drivers, ARRAY_SIZE(drivers));
|
}
|
|
static void __exit sparcspkr_exit(void)
|
{
|
platform_unregister_drivers(drivers, ARRAY_SIZE(drivers));
|
}
|
|
module_init(sparcspkr_init);
|
module_exit(sparcspkr_exit);
|
