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 }, 6697cc2657SIlya Petrov { 6797cc2657SIlya Petrov .name = "nvec-leds", 6897cc2657SIlya Petrov .id = 1, 6997cc2657SIlya Petrov }, 70f686e9afSMarc Dietrich }; 71f686e9afSMarc Dietrich 7232890b98SMarc Dietrich int nvec_register_notifier(struct nvec_chip *nvec, struct notifier_block *nb, 7332890b98SMarc Dietrich unsigned int events) 7432890b98SMarc Dietrich { 7532890b98SMarc Dietrich return atomic_notifier_chain_register(&nvec->notifier_list, nb); 7632890b98SMarc Dietrich } 7732890b98SMarc Dietrich EXPORT_SYMBOL_GPL(nvec_register_notifier); 7832890b98SMarc Dietrich 79162c7d8cSMarc Dietrich static int nvec_status_notifier(struct notifier_block *nb, 80162c7d8cSMarc Dietrich unsigned long event_type, void *data) 8132890b98SMarc Dietrich { 8232890b98SMarc Dietrich unsigned char *msg = (unsigned char *)data; 8332890b98SMarc Dietrich 8432890b98SMarc Dietrich if (event_type != NVEC_CNTL) 8532890b98SMarc Dietrich return NOTIFY_DONE; 8632890b98SMarc Dietrich 87a3a9aa1aSMarc Dietrich printk(KERN_WARNING "unhandled msg type %ld\n", event_type); 88a3a9aa1aSMarc Dietrich print_hex_dump(KERN_WARNING, "payload: ", DUMP_PREFIX_NONE, 16, 1, 89a3a9aa1aSMarc Dietrich msg, msg[1] + 2, true); 9032890b98SMarc Dietrich 9132890b98SMarc Dietrich return NOTIFY_OK; 9232890b98SMarc Dietrich } 9332890b98SMarc Dietrich 94162c7d8cSMarc Dietrich void nvec_write_async(struct nvec_chip *nvec, const unsigned char *data, 95162c7d8cSMarc Dietrich short size) 9632890b98SMarc Dietrich { 9732890b98SMarc Dietrich struct nvec_msg *msg = kzalloc(sizeof(struct nvec_msg), GFP_NOWAIT); 9832890b98SMarc Dietrich 9932890b98SMarc Dietrich msg->data = kzalloc(size, GFP_NOWAIT); 10032890b98SMarc Dietrich msg->data[0] = size; 10132890b98SMarc Dietrich memcpy(msg->data + 1, data, size); 10232890b98SMarc Dietrich msg->size = size + 1; 10332890b98SMarc Dietrich msg->pos = 0; 10432890b98SMarc Dietrich INIT_LIST_HEAD(&msg->node); 10532890b98SMarc Dietrich 10632890b98SMarc Dietrich list_add_tail(&msg->node, &nvec->tx_data); 10732890b98SMarc Dietrich 10832890b98SMarc Dietrich gpio_set_value(nvec->gpio, 0); 10932890b98SMarc Dietrich } 11032890b98SMarc Dietrich EXPORT_SYMBOL(nvec_write_async); 11132890b98SMarc Dietrich 11232890b98SMarc Dietrich static void nvec_request_master(struct work_struct *work) 11332890b98SMarc Dietrich { 11432890b98SMarc Dietrich struct nvec_chip *nvec = container_of(work, struct nvec_chip, tx_work); 11532890b98SMarc Dietrich 116162c7d8cSMarc Dietrich if (!list_empty(&nvec->tx_data)) 11732890b98SMarc Dietrich gpio_set_value(nvec->gpio, 0); 11832890b98SMarc Dietrich } 11932890b98SMarc Dietrich 12032890b98SMarc Dietrich static int parse_msg(struct nvec_chip *nvec, struct nvec_msg *msg) 12132890b98SMarc Dietrich { 12232890b98SMarc Dietrich if ((msg->data[0] & 1 << 7) == 0 && msg->data[3]) { 123162c7d8cSMarc Dietrich dev_err(nvec->dev, "ec responded %02x %02x %02x %02x\n", 124162c7d8cSMarc Dietrich msg->data[0], msg->data[1], msg->data[2], msg->data[3]); 12532890b98SMarc Dietrich return -EINVAL; 12632890b98SMarc Dietrich } 12732890b98SMarc Dietrich 128a3a9aa1aSMarc Dietrich if ((msg->data[0] >> 7) == 1 && (msg->data[0] & 0x0f) == 5) 129a3a9aa1aSMarc Dietrich print_hex_dump(KERN_WARNING, "ec system event ", 130a3a9aa1aSMarc Dietrich DUMP_PREFIX_NONE, 16, 1, msg->data, 131a3a9aa1aSMarc Dietrich msg->data[1] + 2, true); 13232890b98SMarc Dietrich 133162c7d8cSMarc Dietrich atomic_notifier_call_chain(&nvec->notifier_list, msg->data[0] & 0x8f, 134162c7d8cSMarc Dietrich msg->data); 13532890b98SMarc Dietrich 13632890b98SMarc Dietrich return 0; 13732890b98SMarc Dietrich } 13832890b98SMarc Dietrich 139162c7d8cSMarc Dietrich static struct nvec_msg *nvec_write_sync(struct nvec_chip *nvec, 140162c7d8cSMarc Dietrich const unsigned char *data, short size) 14132890b98SMarc Dietrich { 14232890b98SMarc Dietrich down(&nvec->sync_write_mutex); 14332890b98SMarc Dietrich 14432890b98SMarc Dietrich nvec->sync_write_pending = (data[1] << 8) + data[0]; 14532890b98SMarc Dietrich nvec_write_async(nvec, data, size); 14632890b98SMarc Dietrich 147162c7d8cSMarc Dietrich dev_dbg(nvec->dev, "nvec_sync_write: 0x%04x\n", 148162c7d8cSMarc Dietrich nvec->sync_write_pending); 14932890b98SMarc Dietrich wait_for_completion(&nvec->sync_write); 15032890b98SMarc Dietrich dev_dbg(nvec->dev, "nvec_sync_write: pong!\n"); 15132890b98SMarc Dietrich 15232890b98SMarc Dietrich up(&nvec->sync_write_mutex); 15332890b98SMarc Dietrich 15432890b98SMarc Dietrich return nvec->last_sync_msg; 15532890b98SMarc Dietrich } 15632890b98SMarc Dietrich 15732890b98SMarc Dietrich /* RX worker */ 15832890b98SMarc Dietrich static void nvec_dispatch(struct work_struct *work) 15932890b98SMarc Dietrich { 16032890b98SMarc Dietrich struct nvec_chip *nvec = container_of(work, struct nvec_chip, rx_work); 16132890b98SMarc Dietrich struct nvec_msg *msg; 16232890b98SMarc Dietrich 163162c7d8cSMarc Dietrich while (!list_empty(&nvec->rx_data)) { 16432890b98SMarc Dietrich msg = list_first_entry(&nvec->rx_data, struct nvec_msg, node); 16532890b98SMarc Dietrich list_del_init(&msg->node); 16632890b98SMarc Dietrich 167162c7d8cSMarc Dietrich if (nvec->sync_write_pending == 168162c7d8cSMarc Dietrich (msg->data[2] << 8) + msg->data[0]) { 16932890b98SMarc Dietrich dev_dbg(nvec->dev, "sync write completed!\n"); 17032890b98SMarc Dietrich nvec->sync_write_pending = 0; 17132890b98SMarc Dietrich nvec->last_sync_msg = msg; 17232890b98SMarc Dietrich complete(&nvec->sync_write); 17332890b98SMarc Dietrich } else { 17432890b98SMarc Dietrich parse_msg(nvec, msg); 17532890b98SMarc Dietrich if ((!msg) || (!msg->data)) 176162c7d8cSMarc Dietrich dev_warn(nvec->dev, 177162c7d8cSMarc Dietrich "attempt access zero pointer\n"); 17832890b98SMarc Dietrich else { 17932890b98SMarc Dietrich kfree(msg->data); 18032890b98SMarc Dietrich kfree(msg); 18132890b98SMarc Dietrich } 18232890b98SMarc Dietrich } 18332890b98SMarc Dietrich } 18432890b98SMarc Dietrich } 18532890b98SMarc Dietrich 186f686e9afSMarc Dietrich static irqreturn_t nvec_interrupt(int irq, void *dev) 18732890b98SMarc Dietrich { 18832890b98SMarc Dietrich unsigned long status; 18932890b98SMarc Dietrich unsigned long received; 19032890b98SMarc Dietrich unsigned char to_send; 19132890b98SMarc Dietrich struct nvec_msg *msg; 19232890b98SMarc Dietrich struct nvec_chip *nvec = (struct nvec_chip *)dev; 193f686e9afSMarc Dietrich void __iomem *base = nvec->base; 19432890b98SMarc Dietrich 195f686e9afSMarc Dietrich status = readl(base + I2C_SL_STATUS); 19632890b98SMarc Dietrich 197162c7d8cSMarc Dietrich if (!(status & I2C_SL_IRQ)) { 19832890b98SMarc Dietrich dev_warn(nvec->dev, "nvec Spurious IRQ\n"); 19932890b98SMarc Dietrich goto handled; 20032890b98SMarc Dietrich } 201162c7d8cSMarc Dietrich if (status & END_TRANS && !(status & RCVD)) { 20232890b98SMarc Dietrich nvec->state = NVEC_WAIT; 203162c7d8cSMarc Dietrich if (nvec->rx->size > 1) { 20432890b98SMarc Dietrich list_add_tail(&nvec->rx->node, &nvec->rx_data); 20532890b98SMarc Dietrich schedule_work(&nvec->rx_work); 20632890b98SMarc Dietrich } else { 20732890b98SMarc Dietrich kfree(nvec->rx->data); 20832890b98SMarc Dietrich kfree(nvec->rx); 20932890b98SMarc Dietrich } 21032890b98SMarc Dietrich return IRQ_HANDLED; 211162c7d8cSMarc Dietrich } else if (status & RNW) { 21232890b98SMarc Dietrich if (status & RCVD) 21332890b98SMarc Dietrich udelay(3); 21432890b98SMarc Dietrich 21532890b98SMarc Dietrich if (status & RCVD) 21632890b98SMarc Dietrich nvec->state = NVEC_WRITE; 217162c7d8cSMarc Dietrich 218162c7d8cSMarc Dietrich if (list_empty(&nvec->tx_data)) { 21932890b98SMarc Dietrich dev_err(nvec->dev, "nvec empty tx - sending no-op\n"); 22032890b98SMarc Dietrich to_send = 0x8a; 22132890b98SMarc Dietrich nvec_write_async(nvec, "\x07\x02", 2); 22232890b98SMarc Dietrich } else { 223162c7d8cSMarc Dietrich msg = 224162c7d8cSMarc Dietrich list_first_entry(&nvec->tx_data, struct nvec_msg, 225162c7d8cSMarc Dietrich node); 22632890b98SMarc Dietrich if (msg->pos < msg->size) { 22732890b98SMarc Dietrich to_send = msg->data[msg->pos]; 22832890b98SMarc Dietrich msg->pos++; 22932890b98SMarc Dietrich } else { 230162c7d8cSMarc Dietrich dev_err(nvec->dev, "nvec crap! %d\n", 231162c7d8cSMarc Dietrich msg->size); 23232890b98SMarc Dietrich to_send = 0x01; 23332890b98SMarc Dietrich } 23432890b98SMarc Dietrich 235162c7d8cSMarc Dietrich if (msg->pos >= msg->size) { 23632890b98SMarc Dietrich list_del_init(&msg->node); 23732890b98SMarc Dietrich kfree(msg->data); 23832890b98SMarc Dietrich kfree(msg); 23932890b98SMarc Dietrich schedule_work(&nvec->tx_work); 24032890b98SMarc Dietrich nvec->state = NVEC_WAIT; 24132890b98SMarc Dietrich } 24232890b98SMarc Dietrich } 243f686e9afSMarc Dietrich writel(to_send, base + I2C_SL_RCVD); 24432890b98SMarc Dietrich 24532890b98SMarc Dietrich gpio_set_value(nvec->gpio, 1); 24632890b98SMarc Dietrich 24732890b98SMarc Dietrich dev_dbg(nvec->dev, "nvec sent %x\n", to_send); 24832890b98SMarc Dietrich 24932890b98SMarc Dietrich goto handled; 25032890b98SMarc Dietrich } else { 251f686e9afSMarc Dietrich received = readl(base + I2C_SL_RCVD); 252162c7d8cSMarc Dietrich 25332890b98SMarc Dietrich if (status & RCVD) { 254f686e9afSMarc Dietrich writel(0, base + I2C_SL_RCVD); 25532890b98SMarc Dietrich goto handled; 25632890b98SMarc Dietrich } 25732890b98SMarc Dietrich 258162c7d8cSMarc Dietrich if (nvec->state == NVEC_WAIT) { 25932890b98SMarc Dietrich nvec->state = NVEC_READ; 26032890b98SMarc Dietrich msg = kzalloc(sizeof(struct nvec_msg), GFP_NOWAIT); 26132890b98SMarc Dietrich msg->data = kzalloc(32, GFP_NOWAIT); 26232890b98SMarc Dietrich INIT_LIST_HEAD(&msg->node); 26332890b98SMarc Dietrich nvec->rx = msg; 26432890b98SMarc Dietrich } else 26532890b98SMarc Dietrich msg = nvec->rx; 26632890b98SMarc Dietrich 26732890b98SMarc Dietrich BUG_ON(msg->pos > 32); 26832890b98SMarc Dietrich 26932890b98SMarc Dietrich msg->data[msg->pos] = received; 27032890b98SMarc Dietrich msg->pos++; 27132890b98SMarc Dietrich msg->size = msg->pos; 272162c7d8cSMarc Dietrich dev_dbg(nvec->dev, "Got %02lx from Master (pos: %d)!\n", 273162c7d8cSMarc Dietrich received, msg->pos); 27432890b98SMarc Dietrich } 27532890b98SMarc Dietrich handled: 27632890b98SMarc Dietrich return IRQ_HANDLED; 27732890b98SMarc Dietrich } 27832890b98SMarc Dietrich 279f686e9afSMarc Dietrich static void tegra_init_i2c_slave(struct nvec_chip *nvec) 28032890b98SMarc Dietrich { 28132890b98SMarc Dietrich u32 val; 28232890b98SMarc Dietrich 283f686e9afSMarc Dietrich clk_enable(nvec->i2c_clk); 284f686e9afSMarc Dietrich 285f686e9afSMarc Dietrich tegra_periph_reset_assert(nvec->i2c_clk); 28632890b98SMarc Dietrich udelay(2); 287f686e9afSMarc Dietrich tegra_periph_reset_deassert(nvec->i2c_clk); 28832890b98SMarc Dietrich 28932890b98SMarc Dietrich val = I2C_CNFG_NEW_MASTER_SFM | I2C_CNFG_PACKET_MODE_EN | 29032890b98SMarc Dietrich (0x2 << I2C_CNFG_DEBOUNCE_CNT_SHIFT); 291f686e9afSMarc Dietrich writel(val, nvec->base + I2C_CNFG); 29232890b98SMarc Dietrich 293ac810759SMarc Dietrich clk_set_rate(nvec->i2c_clk, 8 * 80000); 294ac810759SMarc Dietrich 295ac810759SMarc Dietrich writel(I2C_SL_NEWL, nvec->base + I2C_SL_CNFG); 296ac810759SMarc Dietrich writel(0x1E, nvec->base + I2C_SL_DELAY_COUNT); 297ac810759SMarc Dietrich 298ac810759SMarc Dietrich writel(nvec->i2c_addr>>1, nvec->base + I2C_SL_ADDR1); 299ac810759SMarc Dietrich writel(0, nvec->base + I2C_SL_ADDR2); 300ac810759SMarc Dietrich 301ac810759SMarc Dietrich enable_irq(nvec->irq); 302ac810759SMarc Dietrich 303ac810759SMarc Dietrich clk_disable(nvec->i2c_clk); 304ac810759SMarc Dietrich } 305ac810759SMarc Dietrich 306ac810759SMarc Dietrich static void nvec_disable_i2c_slave(struct nvec_chip *nvec) 307ac810759SMarc Dietrich { 308ac810759SMarc Dietrich disable_irq(nvec->irq); 309ac810759SMarc Dietrich writel(I2C_SL_NEWL | I2C_SL_NACK, nvec->base + I2C_SL_CNFG); 310f686e9afSMarc Dietrich clk_disable(nvec->i2c_clk); 31132890b98SMarc Dietrich } 31232890b98SMarc Dietrich 31332890b98SMarc Dietrich static void nvec_power_off(void) 31432890b98SMarc Dietrich { 31532890b98SMarc Dietrich nvec_write_async(nvec_power_handle, EC_DISABLE_EVENT_REPORTING, 3); 31632890b98SMarc Dietrich nvec_write_async(nvec_power_handle, "\x04\x01", 2); 31732890b98SMarc Dietrich } 31832890b98SMarc Dietrich 31932890b98SMarc Dietrich static int __devinit tegra_nvec_probe(struct platform_device *pdev) 32032890b98SMarc Dietrich { 321f686e9afSMarc Dietrich int err, ret; 32232890b98SMarc Dietrich struct clk *i2c_clk; 32332890b98SMarc Dietrich struct nvec_platform_data *pdata = pdev->dev.platform_data; 32432890b98SMarc Dietrich struct nvec_chip *nvec; 32532890b98SMarc Dietrich struct nvec_msg *msg; 326f686e9afSMarc Dietrich struct resource *res; 327f686e9afSMarc Dietrich struct resource *iomem; 328f686e9afSMarc Dietrich void __iomem *base; 32932890b98SMarc Dietrich 33032890b98SMarc Dietrich nvec = kzalloc(sizeof(struct nvec_chip), GFP_KERNEL); 33132890b98SMarc Dietrich if (nvec == NULL) { 33232890b98SMarc Dietrich dev_err(&pdev->dev, "failed to reserve memory\n"); 33332890b98SMarc Dietrich return -ENOMEM; 33432890b98SMarc Dietrich } 33532890b98SMarc Dietrich platform_set_drvdata(pdev, nvec); 33632890b98SMarc Dietrich nvec->dev = &pdev->dev; 33732890b98SMarc Dietrich nvec->gpio = pdata->gpio; 338f686e9afSMarc Dietrich nvec->i2c_addr = pdata->i2c_addr; 33932890b98SMarc Dietrich 340f686e9afSMarc Dietrich res = platform_get_resource(pdev, IORESOURCE_MEM, 0); 341f686e9afSMarc Dietrich if (!res) { 342f686e9afSMarc Dietrich dev_err(&pdev->dev, "no mem resource?\n"); 343f686e9afSMarc Dietrich return -ENODEV; 34432890b98SMarc Dietrich } 34532890b98SMarc Dietrich 346f686e9afSMarc Dietrich iomem = request_mem_region(res->start, resource_size(res), pdev->name); 347f686e9afSMarc Dietrich if (!iomem) { 348f686e9afSMarc Dietrich dev_err(&pdev->dev, "I2C region already claimed\n"); 349f686e9afSMarc Dietrich return -EBUSY; 35032890b98SMarc Dietrich } 35132890b98SMarc Dietrich 352f686e9afSMarc Dietrich base = ioremap(iomem->start, resource_size(iomem)); 353f686e9afSMarc Dietrich if (!base) { 354f686e9afSMarc Dietrich dev_err(&pdev->dev, "Can't ioremap I2C region\n"); 355f686e9afSMarc Dietrich return -ENOMEM; 356f686e9afSMarc Dietrich } 35732890b98SMarc Dietrich 358f686e9afSMarc Dietrich res = platform_get_resource(pdev, IORESOURCE_IRQ, 0); 359f686e9afSMarc Dietrich if (!res) { 360f686e9afSMarc Dietrich dev_err(&pdev->dev, "no irq resource?\n"); 361f686e9afSMarc Dietrich ret = -ENODEV; 362f686e9afSMarc Dietrich goto err_iounmap; 363f686e9afSMarc Dietrich } 364f686e9afSMarc Dietrich 365f686e9afSMarc Dietrich i2c_clk = clk_get_sys("tegra-i2c.2", NULL); 366f686e9afSMarc Dietrich if (IS_ERR(i2c_clk)) { 367f686e9afSMarc Dietrich dev_err(nvec->dev, "failed to get controller clock\n"); 368f686e9afSMarc Dietrich goto err_iounmap; 36932890b98SMarc Dietrich } 37032890b98SMarc Dietrich 371f686e9afSMarc Dietrich nvec->base = base; 372f686e9afSMarc Dietrich nvec->irq = res->start; 373f686e9afSMarc Dietrich nvec->i2c_clk = i2c_clk; 374f686e9afSMarc Dietrich 37532890b98SMarc Dietrich /* Set the gpio to low when we've got something to say */ 37632890b98SMarc Dietrich err = gpio_request(nvec->gpio, "nvec gpio"); 37732890b98SMarc Dietrich if (err < 0) 37832890b98SMarc Dietrich dev_err(nvec->dev, "couldn't request gpio\n"); 37932890b98SMarc Dietrich 38032890b98SMarc Dietrich ATOMIC_INIT_NOTIFIER_HEAD(&nvec->notifier_list); 38132890b98SMarc Dietrich 38232890b98SMarc Dietrich init_completion(&nvec->sync_write); 38332890b98SMarc Dietrich sema_init(&nvec->sync_write_mutex, 1); 38432890b98SMarc Dietrich INIT_LIST_HEAD(&nvec->tx_data); 38532890b98SMarc Dietrich INIT_LIST_HEAD(&nvec->rx_data); 38632890b98SMarc Dietrich INIT_WORK(&nvec->rx_work, nvec_dispatch); 38732890b98SMarc Dietrich INIT_WORK(&nvec->tx_work, nvec_request_master); 38832890b98SMarc Dietrich 389f686e9afSMarc Dietrich err = request_irq(nvec->irq, nvec_interrupt, 0, "nvec", nvec); 390f686e9afSMarc Dietrich if (err) { 391f686e9afSMarc Dietrich dev_err(nvec->dev, "couldn't request irq\n"); 392f686e9afSMarc Dietrich goto failed; 393f686e9afSMarc Dietrich } 394ac810759SMarc Dietrich disable_irq(nvec->irq); 395f686e9afSMarc Dietrich 396f686e9afSMarc Dietrich tegra_init_i2c_slave(nvec); 397f686e9afSMarc Dietrich 398ac810759SMarc Dietrich clk_enable(i2c_clk); 399ac810759SMarc Dietrich 400f686e9afSMarc Dietrich gpio_direction_output(nvec->gpio, 1); 401f686e9afSMarc Dietrich gpio_set_value(nvec->gpio, 1); 402f686e9afSMarc Dietrich 40332890b98SMarc Dietrich /* enable event reporting */ 40432890b98SMarc Dietrich nvec_write_async(nvec, EC_ENABLE_EVENT_REPORTING, 40532890b98SMarc Dietrich sizeof(EC_ENABLE_EVENT_REPORTING)); 40632890b98SMarc Dietrich 40732890b98SMarc Dietrich nvec->nvec_status_notifier.notifier_call = nvec_status_notifier; 40832890b98SMarc Dietrich nvec_register_notifier(nvec, &nvec->nvec_status_notifier, 0); 40932890b98SMarc Dietrich 41032890b98SMarc Dietrich nvec_power_handle = nvec; 41132890b98SMarc Dietrich pm_power_off = nvec_power_off; 41232890b98SMarc Dietrich 41332890b98SMarc Dietrich /* Get Firmware Version */ 41432890b98SMarc Dietrich msg = nvec_write_sync(nvec, EC_GET_FIRMWARE_VERSION, 41532890b98SMarc Dietrich sizeof(EC_GET_FIRMWARE_VERSION)); 41632890b98SMarc Dietrich 41732890b98SMarc Dietrich dev_warn(nvec->dev, "ec firmware version %02x.%02x.%02x / %02x\n", 41832890b98SMarc Dietrich msg->data[4], msg->data[5], msg->data[6], msg->data[7]); 41932890b98SMarc Dietrich 42032890b98SMarc Dietrich kfree(msg->data); 42132890b98SMarc Dietrich kfree(msg); 42232890b98SMarc Dietrich 423f686e9afSMarc Dietrich ret = mfd_add_devices(nvec->dev, -1, nvec_devices, 424f686e9afSMarc Dietrich ARRAY_SIZE(nvec_devices), base, 0); 425f686e9afSMarc Dietrich if (ret) 426f686e9afSMarc Dietrich dev_err(nvec->dev, "error adding subdevices\n"); 427f686e9afSMarc Dietrich 42832890b98SMarc Dietrich /* unmute speakers? */ 4296dca320cSMarc Dietrich nvec_write_async(nvec, "\x0d\x10\x59\x95", 4); 43032890b98SMarc Dietrich 43132890b98SMarc Dietrich /* enable lid switch event */ 43232890b98SMarc Dietrich nvec_write_async(nvec, "\x01\x01\x01\x00\x00\x02\x00", 7); 43332890b98SMarc Dietrich 43432890b98SMarc Dietrich /* enable power button event */ 43532890b98SMarc Dietrich nvec_write_async(nvec, "\x01\x01\x01\x00\x00\x80\x00", 7); 43632890b98SMarc Dietrich 43732890b98SMarc Dietrich return 0; 43832890b98SMarc Dietrich 439f686e9afSMarc Dietrich err_iounmap: 440f686e9afSMarc Dietrich iounmap(base); 44132890b98SMarc Dietrich failed: 44232890b98SMarc Dietrich kfree(nvec); 44332890b98SMarc Dietrich return -ENOMEM; 44432890b98SMarc Dietrich } 44532890b98SMarc Dietrich 44632890b98SMarc Dietrich static int __devexit tegra_nvec_remove(struct platform_device *pdev) 44732890b98SMarc Dietrich { 448f686e9afSMarc Dietrich struct nvec_chip *nvec = platform_get_drvdata(pdev); 449f686e9afSMarc Dietrich 450f686e9afSMarc Dietrich nvec_write_async(nvec, EC_DISABLE_EVENT_REPORTING, 3); 451f686e9afSMarc Dietrich mfd_remove_devices(nvec->dev); 452f686e9afSMarc Dietrich free_irq(nvec->irq, &nvec_interrupt); 453f686e9afSMarc Dietrich iounmap(nvec->base); 454f686e9afSMarc Dietrich gpio_free(nvec->gpio); 455f686e9afSMarc Dietrich kfree(nvec); 456f686e9afSMarc Dietrich 45732890b98SMarc Dietrich return 0; 45832890b98SMarc Dietrich } 45932890b98SMarc Dietrich 46032890b98SMarc Dietrich #ifdef CONFIG_PM 46132890b98SMarc Dietrich 46232890b98SMarc Dietrich static int tegra_nvec_suspend(struct platform_device *pdev, pm_message_t state) 46332890b98SMarc Dietrich { 46432890b98SMarc Dietrich struct nvec_chip *nvec = platform_get_drvdata(pdev); 46532890b98SMarc Dietrich 46632890b98SMarc Dietrich dev_dbg(nvec->dev, "suspending\n"); 46732890b98SMarc Dietrich nvec_write_async(nvec, EC_DISABLE_EVENT_REPORTING, 3); 46832890b98SMarc Dietrich nvec_write_async(nvec, "\x04\x02", 2); 469ac810759SMarc Dietrich nvec_disable_i2c_slave(nvec); 47032890b98SMarc Dietrich 47132890b98SMarc Dietrich return 0; 47232890b98SMarc Dietrich } 47332890b98SMarc Dietrich 474162c7d8cSMarc Dietrich static int tegra_nvec_resume(struct platform_device *pdev) 475162c7d8cSMarc Dietrich { 47632890b98SMarc Dietrich struct nvec_chip *nvec = platform_get_drvdata(pdev); 47732890b98SMarc Dietrich 47832890b98SMarc Dietrich dev_dbg(nvec->dev, "resuming\n"); 479f686e9afSMarc Dietrich tegra_init_i2c_slave(nvec); 48032890b98SMarc Dietrich nvec_write_async(nvec, EC_ENABLE_EVENT_REPORTING, 3); 48132890b98SMarc Dietrich 48232890b98SMarc Dietrich return 0; 48332890b98SMarc Dietrich } 48432890b98SMarc Dietrich 48532890b98SMarc Dietrich #else 48632890b98SMarc Dietrich #define tegra_nvec_suspend NULL 48732890b98SMarc Dietrich #define tegra_nvec_resume NULL 48832890b98SMarc Dietrich #endif 48932890b98SMarc Dietrich 490162c7d8cSMarc Dietrich static struct platform_driver nvec_device_driver = { 49132890b98SMarc Dietrich .probe = tegra_nvec_probe, 49232890b98SMarc Dietrich .remove = __devexit_p(tegra_nvec_remove), 49332890b98SMarc Dietrich .suspend = tegra_nvec_suspend, 49432890b98SMarc Dietrich .resume = tegra_nvec_resume, 49532890b98SMarc Dietrich .driver = { 49632890b98SMarc Dietrich .name = "nvec", 49732890b98SMarc Dietrich .owner = THIS_MODULE, 49832890b98SMarc Dietrich } 49932890b98SMarc Dietrich }; 50032890b98SMarc Dietrich 50132890b98SMarc Dietrich static int __init tegra_nvec_init(void) 50232890b98SMarc Dietrich { 50332890b98SMarc Dietrich return platform_driver_register(&nvec_device_driver); 50432890b98SMarc Dietrich } 50532890b98SMarc Dietrich 50632890b98SMarc Dietrich module_init(tegra_nvec_init); 507162c7d8cSMarc Dietrich 50832890b98SMarc Dietrich MODULE_ALIAS("platform:nvec"); 509162c7d8cSMarc Dietrich MODULE_DESCRIPTION("NVIDIA compliant embedded controller interface"); 510162c7d8cSMarc Dietrich MODULE_AUTHOR("Marc Dietrich <marvin24@gmx.de>"); 511162c7d8cSMarc Dietrich MODULE_LICENSE("GPL"); 512