--- /dev/null
+/*
+ * 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);
+ 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",
+ },
+ {},
+};
+
+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",
+ },
+ {},
+};
+
+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 int __init sparcspkr_init(void)
+{
+ int err = platform_driver_register(&bbc_beep_driver);
+
+ if (!err) {
+ err = platform_driver_register(&grover_beep_driver);
+ if (err)
+ platform_driver_unregister(&bbc_beep_driver);
+ }
+
+ return err;
+}
+
+static void __exit sparcspkr_exit(void)
+{
+ platform_driver_unregister(&bbc_beep_driver);
+ platform_driver_unregister(&grover_beep_driver);
+}
+
+module_init(sparcspkr_init);
+module_exit(sparcspkr_exit);
Code Review / kvmfornfv.git / blobdiff