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