Added missing tegra files.HEADmaster

1 files changed, 620 insertions, 0 deletions

diff --git a/drivers/mfd/twl6040-core.c b/drivers/mfd/twl6040-core.c
new file mode 100644
index 00000000000..24d436c2fe4
--- /dev/null
+++ b/drivers/mfd/twl6040-core.c
@@ -0,0 +1,620 @@
+/*
+ * MFD driver for TWL6040 audio device
+ *
+ * Authors:     Misael Lopez Cruz <misael.lopez@ti.com>
+ *              Jorge Eduardo Candelaria <jorge.candelaria@ti.com>
+ *              Peter Ujfalusi <peter.ujfalusi@ti.com>
+ *
+ * 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 <linux/module.h>
+#include <linux/types.h>
+#include <linux/slab.h>
+#include <linux/kernel.h>
+#include <linux/platform_device.h>
+#include <linux/gpio.h>
+#include <linux/delay.h>
+#include <linux/i2c/twl.h>
+#include <linux/mfd/core.h>
+#include <linux/mfd/twl6040.h>
+
+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;
+                        }
+                }
+                /* Default PLL configuration after power up */
+                twl6040->pll = TWL6040_SYSCLK_SEL_LPPLL;
+                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->sysclk = 0;
+        }
+
+out:
+        mutex_unlock(&twl6040->mutex);
+        return ret;
+}
+EXPORT_SYMBOL(twl6040_power);
+
+int twl6040_set_pll(struct twl6040 *twl6040, int pll_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 (pll_id) {
+        case TWL6040_SYSCLK_SEL_LPPLL:
+                /* 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;
+                }
+                break;
+        case TWL6040_SYSCLK_SEL_HPPLL:
+                /* 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);
+                break;
+        default:
+                dev_err(&twl6040_dev->dev, "unknown pll id %d\n", pll_id);
+                ret = -EINVAL;
+                goto pll_out;
+        }
+
+        twl6040->sysclk = freq_out;
+        twl6040->pll = pll_id;
+
+pll_out:
+        mutex_unlock(&twl6040->mutex);
+        return ret;
+}
+EXPORT_SYMBOL(twl6040_set_pll);
+
+int twl6040_get_pll(struct twl6040 *twl6040)
+{
+        if (twl6040->power_count)
+                return twl6040->pll;
+        else
+                return -ENODEV;
+}
+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 <misael.lopez@ti.com>");
+MODULE_AUTHOR("Jorge Eduardo Candelaria <jorge.candelaria@ti.com>");
+MODULE_LICENSE("GPL");
+MODULE_ALIAS("platform:twl6040");