/* * MFD driver for TWL6040 audio device * * Authors: Misael Lopez Cruz * Jorge Eduardo Candelaria * Peter Ujfalusi * * Copyright: (C) 2011 Texas Instruments, Inc. * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License version 2 as * published by the Free Software Foundation. * * This program is distributed in the hope that it will be useful, but * WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA * 02110-1301 USA * */ #include #include #include #include #include #include #include #include #include #include static struct platform_device *twl6040_dev; int twl6040_reg_read(struct twl6040 *twl6040, unsigned int reg) { int ret; u8 val = 0; mutex_lock(&twl6040->io_mutex); ret = twl_i2c_read_u8(TWL_MODULE_AUDIO_VOICE, &val, reg); if (ret < 0) { mutex_unlock(&twl6040->io_mutex); return ret; } mutex_unlock(&twl6040->io_mutex); return val; } EXPORT_SYMBOL(twl6040_reg_read); int twl6040_reg_write(struct twl6040 *twl6040, unsigned int reg, u8 val) { int ret; mutex_lock(&twl6040->io_mutex); ret = twl_i2c_write_u8(TWL_MODULE_AUDIO_VOICE, val, reg); mutex_unlock(&twl6040->io_mutex); return ret; } EXPORT_SYMBOL(twl6040_reg_write); int twl6040_set_bits(struct twl6040 *twl6040, unsigned int reg, u8 mask) { int ret; u8 val; mutex_lock(&twl6040->io_mutex); ret = twl_i2c_read_u8(TWL_MODULE_AUDIO_VOICE, &val, reg); if (ret) goto out; val |= mask; ret = twl_i2c_write_u8(TWL_MODULE_AUDIO_VOICE, val, reg); out: mutex_unlock(&twl6040->io_mutex); return ret; } EXPORT_SYMBOL(twl6040_set_bits); int twl6040_clear_bits(struct twl6040 *twl6040, unsigned int reg, u8 mask) { int ret; u8 val; mutex_lock(&twl6040->io_mutex); ret = twl_i2c_read_u8(TWL_MODULE_AUDIO_VOICE, &val, reg); if (ret) goto out; val &= ~mask; ret = twl_i2c_write_u8(TWL_MODULE_AUDIO_VOICE, val, reg); out: mutex_unlock(&twl6040->io_mutex); return ret; } EXPORT_SYMBOL(twl6040_clear_bits); /* twl6040 codec manual power-up sequence */ static int twl6040_power_up(struct twl6040 *twl6040) { u8 ldoctl, ncpctl, lppllctl; int ret; /* enable high-side LDO, reference system and internal oscillator */ ldoctl = TWL6040_HSLDOENA | TWL6040_REFENA | TWL6040_OSCENA; ret = twl6040_reg_write(twl6040, TWL6040_REG_LDOCTL, ldoctl); if (ret) return ret; usleep_range(10000, 10500); /* enable negative charge pump */ ncpctl = TWL6040_NCPENA; ret = twl6040_reg_write(twl6040, TWL6040_REG_NCPCTL, ncpctl); if (ret) goto ncp_err; usleep_range(1000, 1500); /* enable low-side LDO */ ldoctl |= TWL6040_LSLDOENA; ret = twl6040_reg_write(twl6040, TWL6040_REG_LDOCTL, ldoctl); if (ret) goto lsldo_err; usleep_range(1000, 1500); /* enable low-power PLL */ lppllctl = TWL6040_LPLLENA; ret = twl6040_reg_write(twl6040, TWL6040_REG_LPPLLCTL, lppllctl); if (ret) goto lppll_err; usleep_range(5000, 5500); /* disable internal oscillator */ ldoctl &= ~TWL6040_OSCENA; ret = twl6040_reg_write(twl6040, TWL6040_REG_LDOCTL, ldoctl); if (ret) goto osc_err; return 0; osc_err: lppllctl &= ~TWL6040_LPLLENA; twl6040_reg_write(twl6040, TWL6040_REG_LPPLLCTL, lppllctl); lppll_err: ldoctl &= ~TWL6040_LSLDOENA; twl6040_reg_write(twl6040, TWL6040_REG_LDOCTL, ldoctl); lsldo_err: ncpctl &= ~TWL6040_NCPENA; twl6040_reg_write(twl6040, TWL6040_REG_NCPCTL, ncpctl); ncp_err: ldoctl &= ~(TWL6040_HSLDOENA | TWL6040_REFENA | TWL6040_OSCENA); twl6040_reg_write(twl6040, TWL6040_REG_LDOCTL, ldoctl); return ret; } /* twl6040 manual power-down sequence */ static void twl6040_power_down(struct twl6040 *twl6040) { u8 ncpctl, ldoctl, lppllctl; ncpctl = twl6040_reg_read(twl6040, TWL6040_REG_NCPCTL); ldoctl = twl6040_reg_read(twl6040, TWL6040_REG_LDOCTL); lppllctl = twl6040_reg_read(twl6040, TWL6040_REG_LPPLLCTL); /* enable internal oscillator */ ldoctl |= TWL6040_OSCENA; twl6040_reg_write(twl6040, TWL6040_REG_LDOCTL, ldoctl); usleep_range(1000, 1500); /* disable low-power PLL */ lppllctl &= ~TWL6040_LPLLENA; twl6040_reg_write(twl6040, TWL6040_REG_LPPLLCTL, lppllctl); /* disable low-side LDO */ ldoctl &= ~TWL6040_LSLDOENA; twl6040_reg_write(twl6040, TWL6040_REG_LDOCTL, ldoctl); /* disable negative charge pump */ ncpctl &= ~TWL6040_NCPENA; twl6040_reg_write(twl6040, TWL6040_REG_NCPCTL, ncpctl); /* disable high-side LDO, reference system and internal oscillator */ ldoctl &= ~(TWL6040_HSLDOENA | TWL6040_REFENA | TWL6040_OSCENA); twl6040_reg_write(twl6040, TWL6040_REG_LDOCTL, ldoctl); } static irqreturn_t twl6040_naudint_handler(int irq, void *data) { struct twl6040 *twl6040 = data; u8 intid, status; intid = twl6040_reg_read(twl6040, TWL6040_REG_INTID); if (intid & TWL6040_READYINT) complete(&twl6040->ready); if (intid & TWL6040_THINT) { status = twl6040_reg_read(twl6040, TWL6040_REG_STATUS); if (status & TWL6040_TSHUTDET) { dev_warn(&twl6040_dev->dev, "Thermal shutdown, powering-off"); twl6040_power(twl6040, 0); } else { dev_warn(&twl6040_dev->dev, "Leaving thermal shutdown, powering-on"); twl6040_power(twl6040, 1); } } return IRQ_HANDLED; } static int twl6040_power_up_completion(struct twl6040 *twl6040, int naudint) { int time_left; u8 intid; time_left = wait_for_completion_timeout(&twl6040->ready, msecs_to_jiffies(144)); if (!time_left) { intid = twl6040_reg_read(twl6040, TWL6040_REG_INTID); if (!(intid & TWL6040_READYINT)) { dev_err(&twl6040_dev->dev, "timeout waiting for READYINT\n"); return -ETIMEDOUT; } } return 0; } int twl6040_power(struct twl6040 *twl6040, int on) { int audpwron = twl6040->audpwron; int naudint = twl6040->irq; int ret = 0; mutex_lock(&twl6040->mutex); if (on) { /* already powered-up */ if (twl6040->power_count++) goto out; if (gpio_is_valid(audpwron)) { /* use AUDPWRON line */ gpio_set_value(audpwron, 1); /* wait for power-up completion */ ret = twl6040_power_up_completion(twl6040, naudint); if (ret) { dev_err(&twl6040_dev->dev, "automatic power-down failed\n"); twl6040->power_count = 0; goto out; } } else { /* use manual power-up sequence */ ret = twl6040_power_up(twl6040); if (ret) { dev_err(&twl6040_dev->dev, "manual power-up failed\n"); twl6040->power_count = 0; goto out; } } twl6040->pll = TWL6040_LPPLL_ID; twl6040->sysclk = 19200000; } else { /* already powered-down */ if (!twl6040->power_count) { dev_err(&twl6040_dev->dev, "device is already powered-off\n"); ret = -EPERM; goto out; } if (--twl6040->power_count) goto out; if (gpio_is_valid(audpwron)) { /* use AUDPWRON line */ gpio_set_value(audpwron, 0); /* power-down sequence latency */ usleep_range(500, 700); } else { /* use manual power-down sequence */ twl6040_power_down(twl6040); } twl6040->pll = TWL6040_NOPLL_ID; twl6040->sysclk = 0; } out: mutex_unlock(&twl6040->mutex); return ret; } EXPORT_SYMBOL(twl6040_power); int twl6040_set_pll(struct twl6040 *twl6040, enum twl6040_pll_id id, unsigned int freq_in, unsigned int freq_out) { u8 hppllctl, lppllctl; int ret = 0; mutex_lock(&twl6040->mutex); hppllctl = twl6040_reg_read(twl6040, TWL6040_REG_HPPLLCTL); lppllctl = twl6040_reg_read(twl6040, TWL6040_REG_LPPLLCTL); switch (id) { case TWL6040_LPPLL_ID: /* low-power PLL divider */ switch (freq_out) { case 17640000: lppllctl |= TWL6040_LPLLFIN; break; case 19200000: lppllctl &= ~TWL6040_LPLLFIN; break; default: dev_err(&twl6040_dev->dev, "freq_out %d not supported\n", freq_out); ret = -EINVAL; goto pll_out; } twl6040_reg_write(twl6040, TWL6040_REG_LPPLLCTL, lppllctl); switch (freq_in) { case 32768: lppllctl |= TWL6040_LPLLENA; twl6040_reg_write(twl6040, TWL6040_REG_LPPLLCTL, lppllctl); mdelay(5); lppllctl &= ~TWL6040_HPLLSEL; twl6040_reg_write(twl6040, TWL6040_REG_LPPLLCTL, lppllctl); hppllctl &= ~TWL6040_HPLLENA; twl6040_reg_write(twl6040, TWL6040_REG_HPPLLCTL, hppllctl); break; default: dev_err(&twl6040_dev->dev, "freq_in %d not supported\n", freq_in); ret = -EINVAL; goto pll_out; } twl6040->pll = TWL6040_LPPLL_ID; break; case TWL6040_HPPLL_ID: /* high-performance PLL can provide only 19.2 MHz */ if (freq_out != 19200000) { dev_err(&twl6040_dev->dev, "freq_out %d not supported\n", freq_out); ret = -EINVAL; goto pll_out; } hppllctl &= ~TWL6040_MCLK_MSK; switch (freq_in) { case 12000000: /* PLL enabled, active mode */ hppllctl |= TWL6040_MCLK_12000KHZ | TWL6040_HPLLENA; break; case 19200000: /* * PLL disabled * (enable PLL if MCLK jitter quality * doesn't meet specification) */ hppllctl |= TWL6040_MCLK_19200KHZ; break; case 26000000: /* PLL enabled, active mode */ hppllctl |= TWL6040_MCLK_26000KHZ | TWL6040_HPLLENA; break; case 38400000: /* PLL enabled, active mode */ hppllctl |= TWL6040_MCLK_38400KHZ | TWL6040_HPLLENA; break; default: dev_err(&twl6040_dev->dev, "freq_in %d not supported\n", freq_in); ret = -EINVAL; goto pll_out; } /* enable clock slicer to ensure input waveform is square */ hppllctl |= TWL6040_HPLLSQRENA; twl6040_reg_write(twl6040, TWL6040_REG_HPPLLCTL, hppllctl); usleep_range(500, 700); lppllctl |= TWL6040_HPLLSEL; twl6040_reg_write(twl6040, TWL6040_REG_LPPLLCTL, lppllctl); lppllctl &= ~TWL6040_LPLLENA; twl6040_reg_write(twl6040, TWL6040_REG_LPPLLCTL, lppllctl); twl6040->pll = TWL6040_HPPLL_ID; break; default: dev_err(&twl6040_dev->dev, "unknown pll id %d\n", id); ret = -EINVAL; goto pll_out; } twl6040->sysclk = freq_out; pll_out: mutex_unlock(&twl6040->mutex); return ret; } EXPORT_SYMBOL(twl6040_set_pll); enum twl6040_pll_id twl6040_get_pll(struct twl6040 *twl6040) { return twl6040->pll; } EXPORT_SYMBOL(twl6040_get_pll); unsigned int twl6040_get_sysclk(struct twl6040 *twl6040) { return twl6040->sysclk; } EXPORT_SYMBOL(twl6040_get_sysclk); static struct resource twl6040_vibra_rsrc[] = { { .flags = IORESOURCE_IRQ, }, }; static struct resource twl6040_codec_rsrc[] = { { .flags = IORESOURCE_IRQ, }, }; static int __devinit twl6040_probe(struct platform_device *pdev) { struct twl4030_audio_data *pdata = pdev->dev.platform_data; struct twl6040 *twl6040; struct mfd_cell *cell = NULL; int ret, children = 0; if (!pdata) { dev_err(&pdev->dev, "Platform data is missing\n"); return -EINVAL; } /* In order to operate correctly we need valid interrupt config */ if (!pdata->naudint_irq || !pdata->irq_base) { dev_err(&pdev->dev, "Invalid IRQ configuration\n"); return -EINVAL; } twl6040 = kzalloc(sizeof(struct twl6040), GFP_KERNEL); if (!twl6040) return -ENOMEM; platform_set_drvdata(pdev, twl6040); twl6040_dev = pdev; twl6040->dev = &pdev->dev; twl6040->audpwron = pdata->audpwron_gpio; twl6040->irq = pdata->naudint_irq; twl6040->irq_base = pdata->irq_base; mutex_init(&twl6040->mutex); mutex_init(&twl6040->io_mutex); init_completion(&twl6040->ready); twl6040->rev = twl6040_reg_read(twl6040, TWL6040_REG_ASICREV); if (gpio_is_valid(twl6040->audpwron)) { ret = gpio_request(twl6040->audpwron, "audpwron"); if (ret) goto gpio1_err; ret = gpio_direction_output(twl6040->audpwron, 0); if (ret) goto gpio2_err; } /* ERRATA: Automatic power-up is not possible in ES1.0 */ if (twl6040->rev == TWL6040_REV_ES1_0) twl6040->audpwron = -EINVAL; /* codec interrupt */ ret = twl6040_irq_init(twl6040); if (ret) goto gpio2_err; ret = request_threaded_irq(twl6040->irq_base + TWL6040_IRQ_READY, NULL, twl6040_naudint_handler, 0, "twl6040_irq_ready", twl6040); if (ret) { dev_err(twl6040->dev, "READY IRQ request failed: %d\n", ret); goto irq_err; } /* dual-access registers controlled by I2C only */ twl6040_set_bits(twl6040, TWL6040_REG_ACCCTL, TWL6040_I2CSEL); if (pdata->codec) { int irq = twl6040->irq_base + TWL6040_IRQ_PLUG; cell = &twl6040->cells[children]; cell->name = "twl6040-codec"; twl6040_codec_rsrc[0].start = irq; twl6040_codec_rsrc[0].end = irq; cell->resources = twl6040_codec_rsrc; cell->num_resources = ARRAY_SIZE(twl6040_codec_rsrc); cell->platform_data = pdata->codec; cell->pdata_size = sizeof(*pdata->codec); children++; } if (pdata->vibra) { int irq = twl6040->irq_base + TWL6040_IRQ_VIB; cell = &twl6040->cells[children]; cell->name = "twl6040-vibra"; twl6040_vibra_rsrc[0].start = irq; twl6040_vibra_rsrc[0].end = irq; cell->resources = twl6040_vibra_rsrc; cell->num_resources = ARRAY_SIZE(twl6040_vibra_rsrc); cell->platform_data = pdata->vibra; cell->pdata_size = sizeof(*pdata->vibra); children++; } if (children) { ret = mfd_add_devices(&pdev->dev, pdev->id, twl6040->cells, children, NULL, 0); if (ret) goto mfd_err; } else { dev_err(&pdev->dev, "No platform data found for children\n"); ret = -ENODEV; goto mfd_err; } return 0; mfd_err: free_irq(twl6040->irq_base + TWL6040_IRQ_READY, twl6040); irq_err: twl6040_irq_exit(twl6040); gpio2_err: if (gpio_is_valid(twl6040->audpwron)) gpio_free(twl6040->audpwron); gpio1_err: platform_set_drvdata(pdev, NULL); kfree(twl6040); twl6040_dev = NULL; return ret; } static int __devexit twl6040_remove(struct platform_device *pdev) { struct twl6040 *twl6040 = platform_get_drvdata(pdev); if (twl6040->power_count) twl6040_power(twl6040, 0); if (gpio_is_valid(twl6040->audpwron)) gpio_free(twl6040->audpwron); free_irq(twl6040->irq_base + TWL6040_IRQ_READY, twl6040); twl6040_irq_exit(twl6040); mfd_remove_devices(&pdev->dev); platform_set_drvdata(pdev, NULL); kfree(twl6040); twl6040_dev = NULL; return 0; } static struct platform_driver twl6040_driver = { .probe = twl6040_probe, .remove = __devexit_p(twl6040_remove), .driver = { .owner = THIS_MODULE, .name = "twl6040", }, }; static int __devinit twl6040_init(void) { return platform_driver_register(&twl6040_driver); } module_init(twl6040_init); static void __devexit twl6040_exit(void) { platform_driver_unregister(&twl6040_driver); } module_exit(twl6040_exit); MODULE_DESCRIPTION("TWL6040 MFD"); MODULE_AUTHOR("Misael Lopez Cruz "); MODULE_AUTHOR("Jorge Eduardo Candelaria "); MODULE_LICENSE("GPL"); MODULE_ALIAS("platform:twl6040");