1162c7d8cSMarc Dietrich /* 2162c7d8cSMarc Dietrich * NVEC: NVIDIA compliant embedded controller interface 3162c7d8cSMarc Dietrich * 4162c7d8cSMarc Dietrich * Copyright (C) 2011 The AC100 Kernel Team <ac100@lists.lauchpad.net> 5162c7d8cSMarc Dietrich * 6162c7d8cSMarc Dietrich * Authors: Pierre-Hugues Husson <phhusson@free.fr> 7162c7d8cSMarc Dietrich * Ilya Petrov <ilya.muromec@gmail.com> 8162c7d8cSMarc Dietrich * Marc Dietrich <marvin24@gmx.de> 9162c7d8cSMarc Dietrich * 10162c7d8cSMarc Dietrich * This file is subject to the terms and conditions of the GNU General Public 11162c7d8cSMarc Dietrich * License. See the file "COPYING" in the main directory of this archive 12162c7d8cSMarc Dietrich * for more details. 13162c7d8cSMarc Dietrich * 1432890b98SMarc Dietrich */ 1532890b98SMarc Dietrich 16162c7d8cSMarc Dietrich /* #define DEBUG */ 17162c7d8cSMarc Dietrich 1832890b98SMarc Dietrich #include <asm/irq.h> 19162c7d8cSMarc Dietrich 2032890b98SMarc Dietrich #include <linux/completion.h> 2132890b98SMarc Dietrich #include <linux/interrupt.h> 22162c7d8cSMarc Dietrich #include <linux/io.h> 2332890b98SMarc Dietrich #include <linux/irq.h> 2432890b98SMarc Dietrich #include <linux/slab.h> 2532890b98SMarc Dietrich #include <linux/gpio.h> 2632890b98SMarc Dietrich #include <linux/serio.h> 2732890b98SMarc Dietrich #include <linux/delay.h> 2832890b98SMarc Dietrich #include <linux/input.h> 2932890b98SMarc Dietrich #include <linux/workqueue.h> 3032890b98SMarc Dietrich #include <linux/clk.h> 31162c7d8cSMarc Dietrich 3232890b98SMarc Dietrich #include <linux/semaphore.h> 3332890b98SMarc Dietrich #include <linux/list.h> 3432890b98SMarc Dietrich #include <linux/notifier.h> 3532890b98SMarc Dietrich #include <linux/platform_device.h> 36f686e9afSMarc Dietrich #include <linux/mfd/core.h> 37162c7d8cSMarc Dietrich 38162c7d8cSMarc Dietrich #include <mach/iomap.h> 39162c7d8cSMarc Dietrich #include <mach/clk.h> 40162c7d8cSMarc Dietrich 4132890b98SMarc Dietrich #include "nvec.h" 4232890b98SMarc Dietrich 43162c7d8cSMarc Dietrich static const unsigned char EC_DISABLE_EVENT_REPORTING[3] = "\x04\x00\x00"; 44162c7d8cSMarc Dietrich static const unsigned char EC_ENABLE_EVENT_REPORTING[3] = "\x04\x00\x01"; 45162c7d8cSMarc Dietrich static const unsigned char EC_GET_FIRMWARE_VERSION[2] = "\x07\x15"; 4632890b98SMarc Dietrich 4732890b98SMarc Dietrich static struct nvec_chip *nvec_power_handle; 4832890b98SMarc Dietrich 49f686e9afSMarc Dietrich static struct mfd_cell nvec_devices[] = { 50f686e9afSMarc Dietrich { 51f686e9afSMarc Dietrich .name = "nvec-kbd", 52f686e9afSMarc Dietrich .id = 1, 53f686e9afSMarc Dietrich }, 54f686e9afSMarc Dietrich { 55f686e9afSMarc Dietrich .name = "nvec-mouse", 56f686e9afSMarc Dietrich .id = 1, 57f686e9afSMarc Dietrich }, 58f686e9afSMarc Dietrich { 59f686e9afSMarc Dietrich .name = "nvec-power", 60f686e9afSMarc Dietrich .id = 1, 61f686e9afSMarc Dietrich }, 62f686e9afSMarc Dietrich { 63f686e9afSMarc Dietrich .name = "nvec-power", 64f686e9afSMarc Dietrich .id = 2, 65f686e9afSMarc Dietrich }, 66f686e9afSMarc Dietrich }; 67f686e9afSMarc Dietrich 6832890b98SMarc Dietrich int nvec_register_notifier(struct nvec_chip *nvec, struct notifier_block *nb, 6932890b98SMarc Dietrich unsigned int events) 7032890b98SMarc Dietrich { 7132890b98SMarc Dietrich return atomic_notifier_chain_register(&nvec->notifier_list, nb); 7232890b98SMarc Dietrich } 7332890b98SMarc Dietrich EXPORT_SYMBOL_GPL(nvec_register_notifier); 7432890b98SMarc Dietrich 75162c7d8cSMarc Dietrich static int nvec_status_notifier(struct notifier_block *nb, 76162c7d8cSMarc Dietrich unsigned long event_type, void *data) 7732890b98SMarc Dietrich { 7832890b98SMarc Dietrich unsigned char *msg = (unsigned char *)data; 7932890b98SMarc Dietrich 8032890b98SMarc Dietrich if (event_type != NVEC_CNTL) 8132890b98SMarc Dietrich return NOTIFY_DONE; 8232890b98SMarc Dietrich 83a3a9aa1aSMarc Dietrich printk(KERN_WARNING "unhandled msg type %ld\n", event_type); 84a3a9aa1aSMarc Dietrich print_hex_dump(KERN_WARNING, "payload: ", DUMP_PREFIX_NONE, 16, 1, 85a3a9aa1aSMarc Dietrich msg, msg[1] + 2, true); 8632890b98SMarc Dietrich 8732890b98SMarc Dietrich return NOTIFY_OK; 8832890b98SMarc Dietrich } 8932890b98SMarc Dietrich 90162c7d8cSMarc Dietrich void nvec_write_async(struct nvec_chip *nvec, const unsigned char *data, 91162c7d8cSMarc Dietrich short size) 9232890b98SMarc Dietrich { 9332890b98SMarc Dietrich struct nvec_msg *msg = kzalloc(sizeof(struct nvec_msg), GFP_NOWAIT); 9432890b98SMarc Dietrich 9532890b98SMarc Dietrich msg->data = kzalloc(size, GFP_NOWAIT); 9632890b98SMarc Dietrich msg->data[0] = size; 9732890b98SMarc Dietrich memcpy(msg->data + 1, data, size); 9832890b98SMarc Dietrich msg->size = size + 1; 9932890b98SMarc Dietrich msg->pos = 0; 10032890b98SMarc Dietrich INIT_LIST_HEAD(&msg->node); 10132890b98SMarc Dietrich 10232890b98SMarc Dietrich list_add_tail(&msg->node, &nvec->tx_data); 10332890b98SMarc Dietrich 10432890b98SMarc Dietrich gpio_set_value(nvec->gpio, 0); 10532890b98SMarc Dietrich } 10632890b98SMarc Dietrich EXPORT_SYMBOL(nvec_write_async); 10732890b98SMarc Dietrich 10832890b98SMarc Dietrich static void nvec_request_master(struct work_struct *work) 10932890b98SMarc Dietrich { 11032890b98SMarc Dietrich struct nvec_chip *nvec = container_of(work, struct nvec_chip, tx_work); 11132890b98SMarc Dietrich 112162c7d8cSMarc Dietrich if (!list_empty(&nvec->tx_data)) 11332890b98SMarc Dietrich gpio_set_value(nvec->gpio, 0); 11432890b98SMarc Dietrich } 11532890b98SMarc Dietrich 11632890b98SMarc Dietrich static int parse_msg(struct nvec_chip *nvec, struct nvec_msg *msg) 11732890b98SMarc Dietrich { 11832890b98SMarc Dietrich if ((msg->data[0] & 1 << 7) == 0 && msg->data[3]) { 119162c7d8cSMarc Dietrich dev_err(nvec->dev, "ec responded %02x %02x %02x %02x\n", 120162c7d8cSMarc Dietrich msg->data[0], msg->data[1], msg->data[2], msg->data[3]); 12132890b98SMarc Dietrich return -EINVAL; 12232890b98SMarc Dietrich } 12332890b98SMarc Dietrich 124a3a9aa1aSMarc Dietrich if ((msg->data[0] >> 7) == 1 && (msg->data[0] & 0x0f) == 5) 125a3a9aa1aSMarc Dietrich print_hex_dump(KERN_WARNING, "ec system event ", 126a3a9aa1aSMarc Dietrich DUMP_PREFIX_NONE, 16, 1, msg->data, 127a3a9aa1aSMarc Dietrich msg->data[1] + 2, true); 12832890b98SMarc Dietrich 129162c7d8cSMarc Dietrich atomic_notifier_call_chain(&nvec->notifier_list, msg->data[0] & 0x8f, 130162c7d8cSMarc Dietrich msg->data); 13132890b98SMarc Dietrich 13232890b98SMarc Dietrich return 0; 13332890b98SMarc Dietrich } 13432890b98SMarc Dietrich 135162c7d8cSMarc Dietrich static struct nvec_msg *nvec_write_sync(struct nvec_chip *nvec, 136162c7d8cSMarc Dietrich const unsigned char *data, short size) 13732890b98SMarc Dietrich { 13832890b98SMarc Dietrich down(&nvec->sync_write_mutex); 13932890b98SMarc Dietrich 14032890b98SMarc Dietrich nvec->sync_write_pending = (data[1] << 8) + data[0]; 14132890b98SMarc Dietrich nvec_write_async(nvec, data, size); 14232890b98SMarc Dietrich 143162c7d8cSMarc Dietrich dev_dbg(nvec->dev, "nvec_sync_write: 0x%04x\n", 144162c7d8cSMarc Dietrich nvec->sync_write_pending); 14532890b98SMarc Dietrich wait_for_completion(&nvec->sync_write); 14632890b98SMarc Dietrich dev_dbg(nvec->dev, "nvec_sync_write: pong!\n"); 14732890b98SMarc Dietrich 14832890b98SMarc Dietrich up(&nvec->sync_write_mutex); 14932890b98SMarc Dietrich 15032890b98SMarc Dietrich return nvec->last_sync_msg; 15132890b98SMarc Dietrich } 15232890b98SMarc Dietrich 15332890b98SMarc Dietrich /* RX worker */ 15432890b98SMarc Dietrich static void nvec_dispatch(struct work_struct *work) 15532890b98SMarc Dietrich { 15632890b98SMarc Dietrich struct nvec_chip *nvec = container_of(work, struct nvec_chip, rx_work); 15732890b98SMarc Dietrich struct nvec_msg *msg; 15832890b98SMarc Dietrich 159162c7d8cSMarc Dietrich while (!list_empty(&nvec->rx_data)) { 16032890b98SMarc Dietrich msg = list_first_entry(&nvec->rx_data, struct nvec_msg, node); 16132890b98SMarc Dietrich list_del_init(&msg->node); 16232890b98SMarc Dietrich 163162c7d8cSMarc Dietrich if (nvec->sync_write_pending == 164162c7d8cSMarc Dietrich (msg->data[2] << 8) + msg->data[0]) { 16532890b98SMarc Dietrich dev_dbg(nvec->dev, "sync write completed!\n"); 16632890b98SMarc Dietrich nvec->sync_write_pending = 0; 16732890b98SMarc Dietrich nvec->last_sync_msg = msg; 16832890b98SMarc Dietrich complete(&nvec->sync_write); 16932890b98SMarc Dietrich } else { 17032890b98SMarc Dietrich parse_msg(nvec, msg); 17132890b98SMarc Dietrich if ((!msg) || (!msg->data)) 172162c7d8cSMarc Dietrich dev_warn(nvec->dev, 173162c7d8cSMarc Dietrich "attempt access zero pointer\n"); 17432890b98SMarc Dietrich else { 17532890b98SMarc Dietrich kfree(msg->data); 17632890b98SMarc Dietrich kfree(msg); 17732890b98SMarc Dietrich } 17832890b98SMarc Dietrich } 17932890b98SMarc Dietrich } 18032890b98SMarc Dietrich } 18132890b98SMarc Dietrich 182f686e9afSMarc Dietrich static irqreturn_t nvec_interrupt(int irq, void *dev) 18332890b98SMarc Dietrich { 18432890b98SMarc Dietrich unsigned long status; 18532890b98SMarc Dietrich unsigned long received; 18632890b98SMarc Dietrich unsigned char to_send; 18732890b98SMarc Dietrich struct nvec_msg *msg; 18832890b98SMarc Dietrich struct nvec_chip *nvec = (struct nvec_chip *)dev; 189f686e9afSMarc Dietrich void __iomem *base = nvec->base; 19032890b98SMarc Dietrich 191f686e9afSMarc Dietrich status = readl(base + I2C_SL_STATUS); 19232890b98SMarc Dietrich 193162c7d8cSMarc Dietrich if (!(status & I2C_SL_IRQ)) { 19432890b98SMarc Dietrich dev_warn(nvec->dev, "nvec Spurious IRQ\n"); 19532890b98SMarc Dietrich goto handled; 19632890b98SMarc Dietrich } 197162c7d8cSMarc Dietrich if (status & END_TRANS && !(status & RCVD)) { 19832890b98SMarc Dietrich nvec->state = NVEC_WAIT; 199162c7d8cSMarc Dietrich if (nvec->rx->size > 1) { 20032890b98SMarc Dietrich list_add_tail(&nvec->rx->node, &nvec->rx_data); 20132890b98SMarc Dietrich schedule_work(&nvec->rx_work); 20232890b98SMarc Dietrich } else { 20332890b98SMarc Dietrich kfree(nvec->rx->data); 20432890b98SMarc Dietrich kfree(nvec->rx); 20532890b98SMarc Dietrich } 20632890b98SMarc Dietrich return IRQ_HANDLED; 207162c7d8cSMarc Dietrich } else if (status & RNW) { 20832890b98SMarc Dietrich if (status & RCVD) 20932890b98SMarc Dietrich udelay(3); 21032890b98SMarc Dietrich 21132890b98SMarc Dietrich if (status & RCVD) 21232890b98SMarc Dietrich nvec->state = NVEC_WRITE; 213162c7d8cSMarc Dietrich 214162c7d8cSMarc Dietrich if (list_empty(&nvec->tx_data)) { 21532890b98SMarc Dietrich dev_err(nvec->dev, "nvec empty tx - sending no-op\n"); 21632890b98SMarc Dietrich to_send = 0x8a; 21732890b98SMarc Dietrich nvec_write_async(nvec, "\x07\x02", 2); 21832890b98SMarc Dietrich } else { 219162c7d8cSMarc Dietrich msg = 220162c7d8cSMarc Dietrich list_first_entry(&nvec->tx_data, struct nvec_msg, 221162c7d8cSMarc Dietrich node); 22232890b98SMarc Dietrich if (msg->pos < msg->size) { 22332890b98SMarc Dietrich to_send = msg->data[msg->pos]; 22432890b98SMarc Dietrich msg->pos++; 22532890b98SMarc Dietrich } else { 226162c7d8cSMarc Dietrich dev_err(nvec->dev, "nvec crap! %d\n", 227162c7d8cSMarc Dietrich msg->size); 22832890b98SMarc Dietrich to_send = 0x01; 22932890b98SMarc Dietrich } 23032890b98SMarc Dietrich 231162c7d8cSMarc Dietrich if (msg->pos >= msg->size) { 23232890b98SMarc Dietrich list_del_init(&msg->node); 23332890b98SMarc Dietrich kfree(msg->data); 23432890b98SMarc Dietrich kfree(msg); 23532890b98SMarc Dietrich schedule_work(&nvec->tx_work); 23632890b98SMarc Dietrich nvec->state = NVEC_WAIT; 23732890b98SMarc Dietrich } 23832890b98SMarc Dietrich } 239f686e9afSMarc Dietrich writel(to_send, base + I2C_SL_RCVD); 24032890b98SMarc Dietrich 24132890b98SMarc Dietrich gpio_set_value(nvec->gpio, 1); 24232890b98SMarc Dietrich 24332890b98SMarc Dietrich dev_dbg(nvec->dev, "nvec sent %x\n", to_send); 24432890b98SMarc Dietrich 24532890b98SMarc Dietrich goto handled; 24632890b98SMarc Dietrich } else { 247f686e9afSMarc Dietrich received = readl(base + I2C_SL_RCVD); 248162c7d8cSMarc Dietrich 24932890b98SMarc Dietrich if (status & RCVD) { 250f686e9afSMarc Dietrich writel(0, base + I2C_SL_RCVD); 25132890b98SMarc Dietrich goto handled; 25232890b98SMarc Dietrich } 25332890b98SMarc Dietrich 254162c7d8cSMarc Dietrich if (nvec->state == NVEC_WAIT) { 25532890b98SMarc Dietrich nvec->state = NVEC_READ; 25632890b98SMarc Dietrich msg = kzalloc(sizeof(struct nvec_msg), GFP_NOWAIT); 25732890b98SMarc Dietrich msg->data = kzalloc(32, GFP_NOWAIT); 25832890b98SMarc Dietrich INIT_LIST_HEAD(&msg->node); 25932890b98SMarc Dietrich nvec->rx = msg; 26032890b98SMarc Dietrich } else 26132890b98SMarc Dietrich msg = nvec->rx; 26232890b98SMarc Dietrich 26332890b98SMarc Dietrich BUG_ON(msg->pos > 32); 26432890b98SMarc Dietrich 26532890b98SMarc Dietrich msg->data[msg->pos] = received; 26632890b98SMarc Dietrich msg->pos++; 26732890b98SMarc Dietrich msg->size = msg->pos; 268162c7d8cSMarc Dietrich dev_dbg(nvec->dev, "Got %02lx from Master (pos: %d)!\n", 269162c7d8cSMarc Dietrich received, msg->pos); 27032890b98SMarc Dietrich } 27132890b98SMarc Dietrich handled: 27232890b98SMarc Dietrich return IRQ_HANDLED; 27332890b98SMarc Dietrich } 27432890b98SMarc Dietrich 275f686e9afSMarc Dietrich static void tegra_init_i2c_slave(struct nvec_chip *nvec) 27632890b98SMarc Dietrich { 27732890b98SMarc Dietrich u32 val; 27832890b98SMarc Dietrich 279f686e9afSMarc Dietrich clk_enable(nvec->i2c_clk); 280f686e9afSMarc Dietrich 281f686e9afSMarc Dietrich tegra_periph_reset_assert(nvec->i2c_clk); 28232890b98SMarc Dietrich udelay(2); 283f686e9afSMarc Dietrich tegra_periph_reset_deassert(nvec->i2c_clk); 28432890b98SMarc Dietrich 28532890b98SMarc Dietrich val = I2C_CNFG_NEW_MASTER_SFM | I2C_CNFG_PACKET_MODE_EN | 28632890b98SMarc Dietrich (0x2 << I2C_CNFG_DEBOUNCE_CNT_SHIFT); 287f686e9afSMarc Dietrich writel(val, nvec->base + I2C_CNFG); 28832890b98SMarc Dietrich 289ac810759SMarc Dietrich clk_set_rate(nvec->i2c_clk, 8 * 80000); 290ac810759SMarc Dietrich 291ac810759SMarc Dietrich writel(I2C_SL_NEWL, nvec->base + I2C_SL_CNFG); 292ac810759SMarc Dietrich writel(0x1E, nvec->base + I2C_SL_DELAY_COUNT); 293ac810759SMarc Dietrich 294ac810759SMarc Dietrich writel(nvec->i2c_addr>>1, nvec->base + I2C_SL_ADDR1); 295ac810759SMarc Dietrich writel(0, nvec->base + I2C_SL_ADDR2); 296ac810759SMarc Dietrich 297ac810759SMarc Dietrich enable_irq(nvec->irq); 298ac810759SMarc Dietrich 299ac810759SMarc Dietrich clk_disable(nvec->i2c_clk); 300ac810759SMarc Dietrich } 301ac810759SMarc Dietrich 302ac810759SMarc Dietrich static void nvec_disable_i2c_slave(struct nvec_chip *nvec) 303ac810759SMarc Dietrich { 304ac810759SMarc Dietrich disable_irq(nvec->irq); 305ac810759SMarc Dietrich writel(I2C_SL_NEWL | I2C_SL_NACK, nvec->base + I2C_SL_CNFG); 306f686e9afSMarc Dietrich clk_disable(nvec->i2c_clk); 30732890b98SMarc Dietrich } 30832890b98SMarc Dietrich 30932890b98SMarc Dietrich static void nvec_power_off(void) 31032890b98SMarc Dietrich { 31132890b98SMarc Dietrich nvec_write_async(nvec_power_handle, EC_DISABLE_EVENT_REPORTING, 3); 31232890b98SMarc Dietrich nvec_write_async(nvec_power_handle, "\x04\x01", 2); 31332890b98SMarc Dietrich } 31432890b98SMarc Dietrich 31532890b98SMarc Dietrich static int __devinit tegra_nvec_probe(struct platform_device *pdev) 31632890b98SMarc Dietrich { 317f686e9afSMarc Dietrich int err, ret; 31832890b98SMarc Dietrich struct clk *i2c_clk; 31932890b98SMarc Dietrich struct nvec_platform_data *pdata = pdev->dev.platform_data; 32032890b98SMarc Dietrich struct nvec_chip *nvec; 32132890b98SMarc Dietrich struct nvec_msg *msg; 322f686e9afSMarc Dietrich struct resource *res; 323f686e9afSMarc Dietrich struct resource *iomem; 324f686e9afSMarc Dietrich void __iomem *base; 32532890b98SMarc Dietrich 32632890b98SMarc Dietrich nvec = kzalloc(sizeof(struct nvec_chip), GFP_KERNEL); 32732890b98SMarc Dietrich if (nvec == NULL) { 32832890b98SMarc Dietrich dev_err(&pdev->dev, "failed to reserve memory\n"); 32932890b98SMarc Dietrich return -ENOMEM; 33032890b98SMarc Dietrich } 33132890b98SMarc Dietrich platform_set_drvdata(pdev, nvec); 33232890b98SMarc Dietrich nvec->dev = &pdev->dev; 33332890b98SMarc Dietrich nvec->gpio = pdata->gpio; 334f686e9afSMarc Dietrich nvec->i2c_addr = pdata->i2c_addr; 33532890b98SMarc Dietrich 336f686e9afSMarc Dietrich res = platform_get_resource(pdev, IORESOURCE_MEM, 0); 337f686e9afSMarc Dietrich if (!res) { 338f686e9afSMarc Dietrich dev_err(&pdev->dev, "no mem resource?\n"); 339f686e9afSMarc Dietrich return -ENODEV; 34032890b98SMarc Dietrich } 34132890b98SMarc Dietrich 342f686e9afSMarc Dietrich iomem = request_mem_region(res->start, resource_size(res), pdev->name); 343f686e9afSMarc Dietrich if (!iomem) { 344f686e9afSMarc Dietrich dev_err(&pdev->dev, "I2C region already claimed\n"); 345f686e9afSMarc Dietrich return -EBUSY; 34632890b98SMarc Dietrich } 34732890b98SMarc Dietrich 348f686e9afSMarc Dietrich base = ioremap(iomem->start, resource_size(iomem)); 349f686e9afSMarc Dietrich if (!base) { 350f686e9afSMarc Dietrich dev_err(&pdev->dev, "Can't ioremap I2C region\n"); 351f686e9afSMarc Dietrich return -ENOMEM; 352f686e9afSMarc Dietrich } 35332890b98SMarc Dietrich 354f686e9afSMarc Dietrich res = platform_get_resource(pdev, IORESOURCE_IRQ, 0); 355f686e9afSMarc Dietrich if (!res) { 356f686e9afSMarc Dietrich dev_err(&pdev->dev, "no irq resource?\n"); 357f686e9afSMarc Dietrich ret = -ENODEV; 358f686e9afSMarc Dietrich goto err_iounmap; 359f686e9afSMarc Dietrich } 360f686e9afSMarc Dietrich 361f686e9afSMarc Dietrich i2c_clk = clk_get_sys("tegra-i2c.2", NULL); 362f686e9afSMarc Dietrich if (IS_ERR(i2c_clk)) { 363f686e9afSMarc Dietrich dev_err(nvec->dev, "failed to get controller clock\n"); 364f686e9afSMarc Dietrich goto err_iounmap; 36532890b98SMarc Dietrich } 36632890b98SMarc Dietrich 367f686e9afSMarc Dietrich nvec->base = base; 368f686e9afSMarc Dietrich nvec->irq = res->start; 369f686e9afSMarc Dietrich nvec->i2c_clk = i2c_clk; 370f686e9afSMarc Dietrich 37132890b98SMarc Dietrich /* Set the gpio to low when we've got something to say */ 37232890b98SMarc Dietrich err = gpio_request(nvec->gpio, "nvec gpio"); 37332890b98SMarc Dietrich if (err < 0) 37432890b98SMarc Dietrich dev_err(nvec->dev, "couldn't request gpio\n"); 37532890b98SMarc Dietrich 37632890b98SMarc Dietrich ATOMIC_INIT_NOTIFIER_HEAD(&nvec->notifier_list); 37732890b98SMarc Dietrich 37832890b98SMarc Dietrich init_completion(&nvec->sync_write); 37932890b98SMarc Dietrich sema_init(&nvec->sync_write_mutex, 1); 38032890b98SMarc Dietrich INIT_LIST_HEAD(&nvec->tx_data); 38132890b98SMarc Dietrich INIT_LIST_HEAD(&nvec->rx_data); 38232890b98SMarc Dietrich INIT_WORK(&nvec->rx_work, nvec_dispatch); 38332890b98SMarc Dietrich INIT_WORK(&nvec->tx_work, nvec_request_master); 38432890b98SMarc Dietrich 385f686e9afSMarc Dietrich err = request_irq(nvec->irq, nvec_interrupt, 0, "nvec", nvec); 386f686e9afSMarc Dietrich if (err) { 387f686e9afSMarc Dietrich dev_err(nvec->dev, "couldn't request irq\n"); 388f686e9afSMarc Dietrich goto failed; 389f686e9afSMarc Dietrich } 390ac810759SMarc Dietrich disable_irq(nvec->irq); 391f686e9afSMarc Dietrich 392f686e9afSMarc Dietrich tegra_init_i2c_slave(nvec); 393f686e9afSMarc Dietrich 394ac810759SMarc Dietrich clk_enable(i2c_clk); 395ac810759SMarc Dietrich 396f686e9afSMarc Dietrich gpio_direction_output(nvec->gpio, 1); 397f686e9afSMarc Dietrich gpio_set_value(nvec->gpio, 1); 398f686e9afSMarc Dietrich 39932890b98SMarc Dietrich /* enable event reporting */ 40032890b98SMarc Dietrich nvec_write_async(nvec, EC_ENABLE_EVENT_REPORTING, 40132890b98SMarc Dietrich sizeof(EC_ENABLE_EVENT_REPORTING)); 40232890b98SMarc Dietrich 40332890b98SMarc Dietrich nvec->nvec_status_notifier.notifier_call = nvec_status_notifier; 40432890b98SMarc Dietrich nvec_register_notifier(nvec, &nvec->nvec_status_notifier, 0); 40532890b98SMarc Dietrich 40632890b98SMarc Dietrich nvec_power_handle = nvec; 40732890b98SMarc Dietrich pm_power_off = nvec_power_off; 40832890b98SMarc Dietrich 40932890b98SMarc Dietrich /* Get Firmware Version */ 41032890b98SMarc Dietrich msg = nvec_write_sync(nvec, EC_GET_FIRMWARE_VERSION, 41132890b98SMarc Dietrich sizeof(EC_GET_FIRMWARE_VERSION)); 41232890b98SMarc Dietrich 41332890b98SMarc Dietrich dev_warn(nvec->dev, "ec firmware version %02x.%02x.%02x / %02x\n", 41432890b98SMarc Dietrich msg->data[4], msg->data[5], msg->data[6], msg->data[7]); 41532890b98SMarc Dietrich 41632890b98SMarc Dietrich kfree(msg->data); 41732890b98SMarc Dietrich kfree(msg); 41832890b98SMarc Dietrich 419f686e9afSMarc Dietrich ret = mfd_add_devices(nvec->dev, -1, nvec_devices, 420f686e9afSMarc Dietrich ARRAY_SIZE(nvec_devices), base, 0); 421f686e9afSMarc Dietrich if (ret) 422f686e9afSMarc Dietrich dev_err(nvec->dev, "error adding subdevices\n"); 423f686e9afSMarc Dietrich 42432890b98SMarc Dietrich /* unmute speakers? */ 42532890b98SMarc Dietrich nvec_write_async(nvec, "\x0d\x10\x59\x94", 4); 42632890b98SMarc Dietrich 42732890b98SMarc Dietrich /* enable lid switch event */ 42832890b98SMarc Dietrich nvec_write_async(nvec, "\x01\x01\x01\x00\x00\x02\x00", 7); 42932890b98SMarc Dietrich 43032890b98SMarc Dietrich /* enable power button event */ 43132890b98SMarc Dietrich nvec_write_async(nvec, "\x01\x01\x01\x00\x00\x80\x00", 7); 43232890b98SMarc Dietrich 43332890b98SMarc Dietrich return 0; 43432890b98SMarc Dietrich 435f686e9afSMarc Dietrich err_iounmap: 436f686e9afSMarc Dietrich iounmap(base); 43732890b98SMarc Dietrich failed: 43832890b98SMarc Dietrich kfree(nvec); 43932890b98SMarc Dietrich return -ENOMEM; 44032890b98SMarc Dietrich } 44132890b98SMarc Dietrich 44232890b98SMarc Dietrich static int __devexit tegra_nvec_remove(struct platform_device *pdev) 44332890b98SMarc Dietrich { 444f686e9afSMarc Dietrich struct nvec_chip *nvec = platform_get_drvdata(pdev); 445f686e9afSMarc Dietrich 446f686e9afSMarc Dietrich nvec_write_async(nvec, EC_DISABLE_EVENT_REPORTING, 3); 447f686e9afSMarc Dietrich mfd_remove_devices(nvec->dev); 448f686e9afSMarc Dietrich free_irq(nvec->irq, &nvec_interrupt); 449f686e9afSMarc Dietrich iounmap(nvec->base); 450f686e9afSMarc Dietrich gpio_free(nvec->gpio); 451f686e9afSMarc Dietrich kfree(nvec); 452f686e9afSMarc Dietrich 45332890b98SMarc Dietrich return 0; 45432890b98SMarc Dietrich } 45532890b98SMarc Dietrich 45632890b98SMarc Dietrich #ifdef CONFIG_PM 45732890b98SMarc Dietrich 45832890b98SMarc Dietrich static int tegra_nvec_suspend(struct platform_device *pdev, pm_message_t state) 45932890b98SMarc Dietrich { 46032890b98SMarc Dietrich struct nvec_chip *nvec = platform_get_drvdata(pdev); 46132890b98SMarc Dietrich 46232890b98SMarc Dietrich dev_dbg(nvec->dev, "suspending\n"); 46332890b98SMarc Dietrich nvec_write_async(nvec, EC_DISABLE_EVENT_REPORTING, 3); 46432890b98SMarc Dietrich nvec_write_async(nvec, "\x04\x02", 2); 465ac810759SMarc Dietrich nvec_disable_i2c_slave(nvec); 46632890b98SMarc Dietrich 46732890b98SMarc Dietrich return 0; 46832890b98SMarc Dietrich } 46932890b98SMarc Dietrich 470162c7d8cSMarc Dietrich static int tegra_nvec_resume(struct platform_device *pdev) 471162c7d8cSMarc Dietrich { 47232890b98SMarc Dietrich struct nvec_chip *nvec = platform_get_drvdata(pdev); 47332890b98SMarc Dietrich 47432890b98SMarc Dietrich dev_dbg(nvec->dev, "resuming\n"); 475f686e9afSMarc Dietrich tegra_init_i2c_slave(nvec); 47632890b98SMarc Dietrich nvec_write_async(nvec, EC_ENABLE_EVENT_REPORTING, 3); 47732890b98SMarc Dietrich 47832890b98SMarc Dietrich return 0; 47932890b98SMarc Dietrich } 48032890b98SMarc Dietrich 48132890b98SMarc Dietrich #else 48232890b98SMarc Dietrich #define tegra_nvec_suspend NULL 48332890b98SMarc Dietrich #define tegra_nvec_resume NULL 48432890b98SMarc Dietrich #endif 48532890b98SMarc Dietrich 486162c7d8cSMarc Dietrich static struct platform_driver nvec_device_driver = { 48732890b98SMarc Dietrich .probe = tegra_nvec_probe, 48832890b98SMarc Dietrich .remove = __devexit_p(tegra_nvec_remove), 48932890b98SMarc Dietrich .suspend = tegra_nvec_suspend, 49032890b98SMarc Dietrich .resume = tegra_nvec_resume, 49132890b98SMarc Dietrich .driver = { 49232890b98SMarc Dietrich .name = "nvec", 49332890b98SMarc Dietrich .owner = THIS_MODULE, 49432890b98SMarc Dietrich } 49532890b98SMarc Dietrich }; 49632890b98SMarc Dietrich 49732890b98SMarc Dietrich static int __init tegra_nvec_init(void) 49832890b98SMarc Dietrich { 49932890b98SMarc Dietrich return platform_driver_register(&nvec_device_driver); 50032890b98SMarc Dietrich } 50132890b98SMarc Dietrich 50232890b98SMarc Dietrich module_init(tegra_nvec_init); 503162c7d8cSMarc Dietrich 50432890b98SMarc Dietrich MODULE_ALIAS("platform:nvec"); 505162c7d8cSMarc Dietrich MODULE_DESCRIPTION("NVIDIA compliant embedded controller interface"); 506162c7d8cSMarc Dietrich MODULE_AUTHOR("Marc Dietrich <marvin24@gmx.de>"); 507162c7d8cSMarc Dietrich MODULE_LICENSE("GPL"); 508