| /* |
| * 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) { |
| outb(0x01, info->regs + 0); |
| outb(0x00, info->regs + 2); |
| outb((count >> 16) & 0xff, info->regs + 3); |
| outb((count >> 8) & 0xff, info->regs + 4); |
| outb(0x00, info->regs + 5); |
| } else { |
| outb(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 */ |
| outb(inb(info->enable_reg) | 3, info->enable_reg); |
| /* set command for counter 2, 2 byte write */ |
| outb(0xB6, info->freq_regs + 1); |
| /* select desired HZ */ |
| outb(count & 0xff, info->freq_regs + 0); |
| outb((count >> 8) & 0xff, info->freq_regs + 0); |
| } else { |
| /* disable counter 2 */ |
| outb(inb_p(info->enable_reg) & 0xFC, info->enable_reg); |
| } |
| |
| spin_unlock_irqrestore(&state->lock, flags); |
| |
| return 0; |
| } |
| |
| static int __devinit 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 int sparcspkr_shutdown(struct of_device *dev) |
| { |
| struct sparcspkr_state *state = dev_get_drvdata(&dev->dev); |
| struct input_dev *input_dev = state->input_dev; |
| |
| /* turn off the speaker */ |
| state->event(input_dev, EV_SND, SND_BELL, 0); |
| |
| return 0; |
| } |
| |
| static int __devinit bbc_beep_probe(struct of_device *op, const struct of_device_id *match) |
| { |
| 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; |
| |
| dev_set_drvdata(&op->dev, state); |
| |
| err = sparcspkr_probe(&op->dev); |
| if (err) |
| goto out_clear_drvdata; |
| |
| return 0; |
| |
| out_clear_drvdata: |
| dev_set_drvdata(&op->dev, NULL); |
| of_iounmap(&op->resource[0], info->regs, 6); |
| |
| out_free: |
| kfree(state); |
| out_err: |
| return err; |
| } |
| |
| static int __devexit bbc_remove(struct of_device *op) |
| { |
| struct sparcspkr_state *state = dev_get_drvdata(&op->dev); |
| 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); |
| |
| dev_set_drvdata(&op->dev, NULL); |
| kfree(state); |
| |
| return 0; |
| } |
| |
| static const struct of_device_id bbc_beep_match[] = { |
| { |
| .name = "beep", |
| .compatible = "SUNW,bbc-beep", |
| }, |
| {}, |
| }; |
| |
| static struct of_platform_driver bbc_beep_driver = { |
| .driver = { |
| .name = "bbcbeep", |
| .owner = THIS_MODULE, |
| .of_match_table = bbc_beep_match, |
| }, |
| .probe = bbc_beep_probe, |
| .remove = __devexit_p(bbc_remove), |
| .shutdown = sparcspkr_shutdown, |
| }; |
| |
| static int __devinit grover_beep_probe(struct of_device *op, const struct of_device_id *match) |
| { |
| 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; |
| |
| dev_set_drvdata(&op->dev, state); |
| |
| err = sparcspkr_probe(&op->dev); |
| if (err) |
| goto out_clear_drvdata; |
| |
| return 0; |
| |
| out_clear_drvdata: |
| dev_set_drvdata(&op->dev, NULL); |
| 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 __devexit grover_remove(struct of_device *op) |
| { |
| struct sparcspkr_state *state = dev_get_drvdata(&op->dev); |
| 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); |
| |
| dev_set_drvdata(&op->dev, NULL); |
| kfree(state); |
| |
| return 0; |
| } |
| |
| static const struct of_device_id grover_beep_match[] = { |
| { |
| .name = "beep", |
| .compatible = "SUNW,smbus-beep", |
| }, |
| {}, |
| }; |
| |
| static struct of_platform_driver grover_beep_driver = { |
| .driver = { |
| .name = "groverbeep", |
| .owner = THIS_MODULE, |
| .of_match_table = grover_beep_match, |
| }, |
| .probe = grover_beep_probe, |
| .remove = __devexit_p(grover_remove), |
| .shutdown = sparcspkr_shutdown, |
| }; |
| |
| static int __init sparcspkr_init(void) |
| { |
| int err = of_register_platform_driver(&bbc_beep_driver); |
| |
| if (!err) { |
| err = of_register_platform_driver(&grover_beep_driver); |
| if (err) |
| of_unregister_platform_driver(&bbc_beep_driver); |
| } |
| |
| return err; |
| } |
| |
| static void __exit sparcspkr_exit(void) |
| { |
| of_unregister_platform_driver(&bbc_beep_driver); |
| of_unregister_platform_driver(&grover_beep_driver); |
| } |
| |
| module_init(sparcspkr_init); |
| module_exit(sparcspkr_exit); |