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 200b1076c4SJulian Andres Klode #include <linux/atomic.h> 2132890b98SMarc Dietrich #include <linux/completion.h> 2232890b98SMarc Dietrich #include <linux/interrupt.h> 23162c7d8cSMarc Dietrich #include <linux/io.h> 2432890b98SMarc Dietrich #include <linux/irq.h> 2532890b98SMarc Dietrich #include <linux/slab.h> 2632890b98SMarc Dietrich #include <linux/gpio.h> 2732890b98SMarc Dietrich #include <linux/serio.h> 2832890b98SMarc Dietrich #include <linux/delay.h> 2932890b98SMarc Dietrich #include <linux/input.h> 3032890b98SMarc Dietrich #include <linux/workqueue.h> 3132890b98SMarc Dietrich #include <linux/clk.h> 32162c7d8cSMarc Dietrich 3332890b98SMarc Dietrich #include <linux/semaphore.h> 3432890b98SMarc Dietrich #include <linux/list.h> 3532890b98SMarc Dietrich #include <linux/notifier.h> 3632890b98SMarc Dietrich #include <linux/platform_device.h> 37f686e9afSMarc Dietrich #include <linux/mfd/core.h> 38162c7d8cSMarc Dietrich 39162c7d8cSMarc Dietrich #include <mach/iomap.h> 40162c7d8cSMarc Dietrich #include <mach/clk.h> 41162c7d8cSMarc Dietrich 4232890b98SMarc Dietrich #include "nvec.h" 4332890b98SMarc Dietrich 44162c7d8cSMarc Dietrich static const unsigned char EC_DISABLE_EVENT_REPORTING[3] = "\x04\x00\x00"; 45162c7d8cSMarc Dietrich static const unsigned char EC_ENABLE_EVENT_REPORTING[3] = "\x04\x00\x01"; 46162c7d8cSMarc Dietrich static const unsigned char EC_GET_FIRMWARE_VERSION[2] = "\x07\x15"; 4732890b98SMarc Dietrich 4832890b98SMarc Dietrich static struct nvec_chip *nvec_power_handle; 4932890b98SMarc Dietrich 50f686e9afSMarc Dietrich static struct mfd_cell nvec_devices[] = { 51f686e9afSMarc Dietrich { 52f686e9afSMarc Dietrich .name = "nvec-kbd", 53f686e9afSMarc Dietrich .id = 1, 54f686e9afSMarc Dietrich }, 55f686e9afSMarc Dietrich { 56f686e9afSMarc Dietrich .name = "nvec-mouse", 57f686e9afSMarc Dietrich .id = 1, 58f686e9afSMarc Dietrich }, 59f686e9afSMarc Dietrich { 60f686e9afSMarc Dietrich .name = "nvec-power", 61f686e9afSMarc Dietrich .id = 1, 62f686e9afSMarc Dietrich }, 63f686e9afSMarc Dietrich { 64f686e9afSMarc Dietrich .name = "nvec-power", 65f686e9afSMarc Dietrich .id = 2, 66f686e9afSMarc Dietrich }, 6797cc2657SIlya Petrov { 6897cc2657SIlya Petrov .name = "nvec-leds", 6997cc2657SIlya Petrov .id = 1, 7097cc2657SIlya Petrov }, 71f686e9afSMarc Dietrich }; 72f686e9afSMarc Dietrich 7332890b98SMarc Dietrich int nvec_register_notifier(struct nvec_chip *nvec, struct notifier_block *nb, 7432890b98SMarc Dietrich unsigned int events) 7532890b98SMarc Dietrich { 7632890b98SMarc Dietrich return atomic_notifier_chain_register(&nvec->notifier_list, nb); 7732890b98SMarc Dietrich } 7832890b98SMarc Dietrich EXPORT_SYMBOL_GPL(nvec_register_notifier); 7932890b98SMarc Dietrich 80162c7d8cSMarc Dietrich static int nvec_status_notifier(struct notifier_block *nb, 81162c7d8cSMarc Dietrich unsigned long event_type, void *data) 8232890b98SMarc Dietrich { 8332890b98SMarc Dietrich unsigned char *msg = (unsigned char *)data; 8432890b98SMarc Dietrich 8532890b98SMarc Dietrich if (event_type != NVEC_CNTL) 8632890b98SMarc Dietrich return NOTIFY_DONE; 8732890b98SMarc Dietrich 88a3a9aa1aSMarc Dietrich printk(KERN_WARNING "unhandled msg type %ld\n", event_type); 89a3a9aa1aSMarc Dietrich print_hex_dump(KERN_WARNING, "payload: ", DUMP_PREFIX_NONE, 16, 1, 90a3a9aa1aSMarc Dietrich msg, msg[1] + 2, true); 9132890b98SMarc Dietrich 9232890b98SMarc Dietrich return NOTIFY_OK; 9332890b98SMarc Dietrich } 9432890b98SMarc Dietrich 950b1076c4SJulian Andres Klode static struct nvec_msg *nvec_msg_alloc(struct nvec_chip *nvec) 960b1076c4SJulian Andres Klode { 970b1076c4SJulian Andres Klode int i; 980b1076c4SJulian Andres Klode 990b1076c4SJulian Andres Klode for (i = 0; i < NVEC_POOL_SIZE; i++) { 1000b1076c4SJulian Andres Klode if (atomic_xchg(&nvec->msg_pool[i].used, 1) == 0) { 1010b1076c4SJulian Andres Klode dev_vdbg(nvec->dev, "INFO: Allocate %i\n", i); 1020b1076c4SJulian Andres Klode return &nvec->msg_pool[i]; 1030b1076c4SJulian Andres Klode } 1040b1076c4SJulian Andres Klode } 1050b1076c4SJulian Andres Klode 1060b1076c4SJulian Andres Klode dev_err(nvec->dev, "could not allocate buffer\n"); 1070b1076c4SJulian Andres Klode 1080b1076c4SJulian Andres Klode return NULL; 1090b1076c4SJulian Andres Klode } 1100b1076c4SJulian Andres Klode 1110b1076c4SJulian Andres Klode static void nvec_msg_free(struct nvec_chip *nvec, struct nvec_msg *msg) 1120b1076c4SJulian Andres Klode { 1130b1076c4SJulian Andres Klode dev_vdbg(nvec->dev, "INFO: Free %ti\n", msg - nvec->msg_pool); 1140b1076c4SJulian Andres Klode atomic_set(&msg->used, 0); 1150b1076c4SJulian Andres Klode } 1160b1076c4SJulian Andres Klode 117162c7d8cSMarc Dietrich void nvec_write_async(struct nvec_chip *nvec, const unsigned char *data, 118162c7d8cSMarc Dietrich short size) 11932890b98SMarc Dietrich { 12032890b98SMarc Dietrich struct nvec_msg *msg = kzalloc(sizeof(struct nvec_msg), GFP_NOWAIT); 12132890b98SMarc Dietrich 12232890b98SMarc Dietrich msg->data = kzalloc(size, GFP_NOWAIT); 12332890b98SMarc Dietrich msg->data[0] = size; 12432890b98SMarc Dietrich memcpy(msg->data + 1, data, size); 12532890b98SMarc Dietrich msg->size = size + 1; 12632890b98SMarc Dietrich msg->pos = 0; 12732890b98SMarc Dietrich INIT_LIST_HEAD(&msg->node); 12832890b98SMarc Dietrich 12932890b98SMarc Dietrich list_add_tail(&msg->node, &nvec->tx_data); 13032890b98SMarc Dietrich 13132890b98SMarc Dietrich gpio_set_value(nvec->gpio, 0); 13232890b98SMarc Dietrich } 13332890b98SMarc Dietrich EXPORT_SYMBOL(nvec_write_async); 13432890b98SMarc Dietrich 13532890b98SMarc Dietrich static void nvec_request_master(struct work_struct *work) 13632890b98SMarc Dietrich { 13732890b98SMarc Dietrich struct nvec_chip *nvec = container_of(work, struct nvec_chip, tx_work); 13832890b98SMarc Dietrich 139162c7d8cSMarc Dietrich if (!list_empty(&nvec->tx_data)) 14032890b98SMarc Dietrich gpio_set_value(nvec->gpio, 0); 14132890b98SMarc Dietrich } 14232890b98SMarc Dietrich 14332890b98SMarc Dietrich static int parse_msg(struct nvec_chip *nvec, struct nvec_msg *msg) 14432890b98SMarc Dietrich { 14532890b98SMarc Dietrich if ((msg->data[0] & 1 << 7) == 0 && msg->data[3]) { 146162c7d8cSMarc Dietrich dev_err(nvec->dev, "ec responded %02x %02x %02x %02x\n", 147162c7d8cSMarc Dietrich msg->data[0], msg->data[1], msg->data[2], msg->data[3]); 14832890b98SMarc Dietrich return -EINVAL; 14932890b98SMarc Dietrich } 15032890b98SMarc Dietrich 151a3a9aa1aSMarc Dietrich if ((msg->data[0] >> 7) == 1 && (msg->data[0] & 0x0f) == 5) 152a3a9aa1aSMarc Dietrich print_hex_dump(KERN_WARNING, "ec system event ", 153a3a9aa1aSMarc Dietrich DUMP_PREFIX_NONE, 16, 1, msg->data, 154a3a9aa1aSMarc Dietrich msg->data[1] + 2, true); 15532890b98SMarc Dietrich 156162c7d8cSMarc Dietrich atomic_notifier_call_chain(&nvec->notifier_list, msg->data[0] & 0x8f, 157162c7d8cSMarc Dietrich msg->data); 15832890b98SMarc Dietrich 15932890b98SMarc Dietrich return 0; 16032890b98SMarc Dietrich } 16132890b98SMarc Dietrich 162162c7d8cSMarc Dietrich static struct nvec_msg *nvec_write_sync(struct nvec_chip *nvec, 163162c7d8cSMarc Dietrich const unsigned char *data, short size) 16432890b98SMarc Dietrich { 16532890b98SMarc Dietrich down(&nvec->sync_write_mutex); 16632890b98SMarc Dietrich 16732890b98SMarc Dietrich nvec->sync_write_pending = (data[1] << 8) + data[0]; 16832890b98SMarc Dietrich nvec_write_async(nvec, data, size); 16932890b98SMarc Dietrich 170162c7d8cSMarc Dietrich dev_dbg(nvec->dev, "nvec_sync_write: 0x%04x\n", 171162c7d8cSMarc Dietrich nvec->sync_write_pending); 17232890b98SMarc Dietrich wait_for_completion(&nvec->sync_write); 17332890b98SMarc Dietrich dev_dbg(nvec->dev, "nvec_sync_write: pong!\n"); 17432890b98SMarc Dietrich 17532890b98SMarc Dietrich up(&nvec->sync_write_mutex); 17632890b98SMarc Dietrich 17732890b98SMarc Dietrich return nvec->last_sync_msg; 17832890b98SMarc Dietrich } 17932890b98SMarc Dietrich 18032890b98SMarc Dietrich /* RX worker */ 18132890b98SMarc Dietrich static void nvec_dispatch(struct work_struct *work) 18232890b98SMarc Dietrich { 18332890b98SMarc Dietrich struct nvec_chip *nvec = container_of(work, struct nvec_chip, rx_work); 18432890b98SMarc Dietrich struct nvec_msg *msg; 18532890b98SMarc Dietrich 186162c7d8cSMarc Dietrich while (!list_empty(&nvec->rx_data)) { 18732890b98SMarc Dietrich msg = list_first_entry(&nvec->rx_data, struct nvec_msg, node); 18832890b98SMarc Dietrich list_del_init(&msg->node); 18932890b98SMarc Dietrich 190162c7d8cSMarc Dietrich if (nvec->sync_write_pending == 191162c7d8cSMarc Dietrich (msg->data[2] << 8) + msg->data[0]) { 19232890b98SMarc Dietrich dev_dbg(nvec->dev, "sync write completed!\n"); 19332890b98SMarc Dietrich nvec->sync_write_pending = 0; 19432890b98SMarc Dietrich nvec->last_sync_msg = msg; 19532890b98SMarc Dietrich complete(&nvec->sync_write); 19632890b98SMarc Dietrich } else { 19732890b98SMarc Dietrich parse_msg(nvec, msg); 19832890b98SMarc Dietrich if ((!msg) || (!msg->data)) 199162c7d8cSMarc Dietrich dev_warn(nvec->dev, 200162c7d8cSMarc Dietrich "attempt access zero pointer\n"); 20132890b98SMarc Dietrich else { 20232890b98SMarc Dietrich kfree(msg->data); 20332890b98SMarc Dietrich kfree(msg); 20432890b98SMarc Dietrich } 20532890b98SMarc Dietrich } 20632890b98SMarc Dietrich } 20732890b98SMarc Dietrich } 20832890b98SMarc Dietrich 209f686e9afSMarc Dietrich static irqreturn_t nvec_interrupt(int irq, void *dev) 21032890b98SMarc Dietrich { 21132890b98SMarc Dietrich unsigned long status; 21232890b98SMarc Dietrich unsigned long received; 21332890b98SMarc Dietrich unsigned char to_send; 21432890b98SMarc Dietrich struct nvec_msg *msg; 21532890b98SMarc Dietrich struct nvec_chip *nvec = (struct nvec_chip *)dev; 216f686e9afSMarc Dietrich void __iomem *base = nvec->base; 21732890b98SMarc Dietrich 218f686e9afSMarc Dietrich status = readl(base + I2C_SL_STATUS); 21932890b98SMarc Dietrich 220162c7d8cSMarc Dietrich if (!(status & I2C_SL_IRQ)) { 22132890b98SMarc Dietrich dev_warn(nvec->dev, "nvec Spurious IRQ\n"); 22232890b98SMarc Dietrich goto handled; 22332890b98SMarc Dietrich } 224162c7d8cSMarc Dietrich if (status & END_TRANS && !(status & RCVD)) { 22532890b98SMarc Dietrich nvec->state = NVEC_WAIT; 226162c7d8cSMarc Dietrich if (nvec->rx->size > 1) { 22732890b98SMarc Dietrich list_add_tail(&nvec->rx->node, &nvec->rx_data); 22832890b98SMarc Dietrich schedule_work(&nvec->rx_work); 22932890b98SMarc Dietrich } else { 23032890b98SMarc Dietrich kfree(nvec->rx->data); 23132890b98SMarc Dietrich kfree(nvec->rx); 23232890b98SMarc Dietrich } 23332890b98SMarc Dietrich return IRQ_HANDLED; 234162c7d8cSMarc Dietrich } else if (status & RNW) { 23532890b98SMarc Dietrich if (status & RCVD) 23632890b98SMarc Dietrich udelay(3); 23732890b98SMarc Dietrich 23832890b98SMarc Dietrich if (status & RCVD) 23932890b98SMarc Dietrich nvec->state = NVEC_WRITE; 240162c7d8cSMarc Dietrich 241162c7d8cSMarc Dietrich if (list_empty(&nvec->tx_data)) { 24232890b98SMarc Dietrich dev_err(nvec->dev, "nvec empty tx - sending no-op\n"); 24332890b98SMarc Dietrich to_send = 0x8a; 24432890b98SMarc Dietrich nvec_write_async(nvec, "\x07\x02", 2); 24532890b98SMarc Dietrich } else { 246162c7d8cSMarc Dietrich msg = 247162c7d8cSMarc Dietrich list_first_entry(&nvec->tx_data, struct nvec_msg, 248162c7d8cSMarc Dietrich node); 24932890b98SMarc Dietrich if (msg->pos < msg->size) { 25032890b98SMarc Dietrich to_send = msg->data[msg->pos]; 25132890b98SMarc Dietrich msg->pos++; 25232890b98SMarc Dietrich } else { 253162c7d8cSMarc Dietrich dev_err(nvec->dev, "nvec crap! %d\n", 254162c7d8cSMarc Dietrich msg->size); 25532890b98SMarc Dietrich to_send = 0x01; 25632890b98SMarc Dietrich } 25732890b98SMarc Dietrich 258162c7d8cSMarc Dietrich if (msg->pos >= msg->size) { 25932890b98SMarc Dietrich list_del_init(&msg->node); 26032890b98SMarc Dietrich kfree(msg->data); 26132890b98SMarc Dietrich kfree(msg); 26232890b98SMarc Dietrich schedule_work(&nvec->tx_work); 26332890b98SMarc Dietrich nvec->state = NVEC_WAIT; 26432890b98SMarc Dietrich } 26532890b98SMarc Dietrich } 266f686e9afSMarc Dietrich writel(to_send, base + I2C_SL_RCVD); 26732890b98SMarc Dietrich 26832890b98SMarc Dietrich gpio_set_value(nvec->gpio, 1); 26932890b98SMarc Dietrich 27032890b98SMarc Dietrich dev_dbg(nvec->dev, "nvec sent %x\n", to_send); 27132890b98SMarc Dietrich 27232890b98SMarc Dietrich goto handled; 27332890b98SMarc Dietrich } else { 274f686e9afSMarc Dietrich received = readl(base + I2C_SL_RCVD); 275162c7d8cSMarc Dietrich 27632890b98SMarc Dietrich if (status & RCVD) { 277f686e9afSMarc Dietrich writel(0, base + I2C_SL_RCVD); 27832890b98SMarc Dietrich goto handled; 27932890b98SMarc Dietrich } 28032890b98SMarc Dietrich 281162c7d8cSMarc Dietrich if (nvec->state == NVEC_WAIT) { 28232890b98SMarc Dietrich nvec->state = NVEC_READ; 28332890b98SMarc Dietrich msg = kzalloc(sizeof(struct nvec_msg), GFP_NOWAIT); 28432890b98SMarc Dietrich msg->data = kzalloc(32, GFP_NOWAIT); 28532890b98SMarc Dietrich INIT_LIST_HEAD(&msg->node); 28632890b98SMarc Dietrich nvec->rx = msg; 28732890b98SMarc Dietrich } else 28832890b98SMarc Dietrich msg = nvec->rx; 28932890b98SMarc Dietrich 29032890b98SMarc Dietrich BUG_ON(msg->pos > 32); 29132890b98SMarc Dietrich 29232890b98SMarc Dietrich msg->data[msg->pos] = received; 29332890b98SMarc Dietrich msg->pos++; 29432890b98SMarc Dietrich msg->size = msg->pos; 295162c7d8cSMarc Dietrich dev_dbg(nvec->dev, "Got %02lx from Master (pos: %d)!\n", 296162c7d8cSMarc Dietrich received, msg->pos); 29732890b98SMarc Dietrich } 29832890b98SMarc Dietrich handled: 29932890b98SMarc Dietrich return IRQ_HANDLED; 30032890b98SMarc Dietrich } 30132890b98SMarc Dietrich 302f686e9afSMarc Dietrich static void tegra_init_i2c_slave(struct nvec_chip *nvec) 30332890b98SMarc Dietrich { 30432890b98SMarc Dietrich u32 val; 30532890b98SMarc Dietrich 306f686e9afSMarc Dietrich clk_enable(nvec->i2c_clk); 307f686e9afSMarc Dietrich 308f686e9afSMarc Dietrich tegra_periph_reset_assert(nvec->i2c_clk); 30932890b98SMarc Dietrich udelay(2); 310f686e9afSMarc Dietrich tegra_periph_reset_deassert(nvec->i2c_clk); 31132890b98SMarc Dietrich 31232890b98SMarc Dietrich val = I2C_CNFG_NEW_MASTER_SFM | I2C_CNFG_PACKET_MODE_EN | 31332890b98SMarc Dietrich (0x2 << I2C_CNFG_DEBOUNCE_CNT_SHIFT); 314f686e9afSMarc Dietrich writel(val, nvec->base + I2C_CNFG); 31532890b98SMarc Dietrich 316ac810759SMarc Dietrich clk_set_rate(nvec->i2c_clk, 8 * 80000); 317ac810759SMarc Dietrich 318ac810759SMarc Dietrich writel(I2C_SL_NEWL, nvec->base + I2C_SL_CNFG); 319ac810759SMarc Dietrich writel(0x1E, nvec->base + I2C_SL_DELAY_COUNT); 320ac810759SMarc Dietrich 321ac810759SMarc Dietrich writel(nvec->i2c_addr>>1, nvec->base + I2C_SL_ADDR1); 322ac810759SMarc Dietrich writel(0, nvec->base + I2C_SL_ADDR2); 323ac810759SMarc Dietrich 324ac810759SMarc Dietrich enable_irq(nvec->irq); 325ac810759SMarc Dietrich 326ac810759SMarc Dietrich clk_disable(nvec->i2c_clk); 327ac810759SMarc Dietrich } 328ac810759SMarc Dietrich 329ac810759SMarc Dietrich static void nvec_disable_i2c_slave(struct nvec_chip *nvec) 330ac810759SMarc Dietrich { 331ac810759SMarc Dietrich disable_irq(nvec->irq); 332ac810759SMarc Dietrich writel(I2C_SL_NEWL | I2C_SL_NACK, nvec->base + I2C_SL_CNFG); 333f686e9afSMarc Dietrich clk_disable(nvec->i2c_clk); 33432890b98SMarc Dietrich } 33532890b98SMarc Dietrich 33632890b98SMarc Dietrich static void nvec_power_off(void) 33732890b98SMarc Dietrich { 33832890b98SMarc Dietrich nvec_write_async(nvec_power_handle, EC_DISABLE_EVENT_REPORTING, 3); 33932890b98SMarc Dietrich nvec_write_async(nvec_power_handle, "\x04\x01", 2); 34032890b98SMarc Dietrich } 34132890b98SMarc Dietrich 34232890b98SMarc Dietrich static int __devinit tegra_nvec_probe(struct platform_device *pdev) 34332890b98SMarc Dietrich { 344f686e9afSMarc Dietrich int err, ret; 34532890b98SMarc Dietrich struct clk *i2c_clk; 34632890b98SMarc Dietrich struct nvec_platform_data *pdata = pdev->dev.platform_data; 34732890b98SMarc Dietrich struct nvec_chip *nvec; 34832890b98SMarc Dietrich struct nvec_msg *msg; 349f686e9afSMarc Dietrich struct resource *res; 350f686e9afSMarc Dietrich struct resource *iomem; 351f686e9afSMarc Dietrich void __iomem *base; 35232890b98SMarc Dietrich 35332890b98SMarc Dietrich nvec = kzalloc(sizeof(struct nvec_chip), GFP_KERNEL); 35432890b98SMarc Dietrich if (nvec == NULL) { 35532890b98SMarc Dietrich dev_err(&pdev->dev, "failed to reserve memory\n"); 35632890b98SMarc Dietrich return -ENOMEM; 35732890b98SMarc Dietrich } 35832890b98SMarc Dietrich platform_set_drvdata(pdev, nvec); 35932890b98SMarc Dietrich nvec->dev = &pdev->dev; 36032890b98SMarc Dietrich nvec->gpio = pdata->gpio; 361f686e9afSMarc Dietrich nvec->i2c_addr = pdata->i2c_addr; 36232890b98SMarc Dietrich 363f686e9afSMarc Dietrich res = platform_get_resource(pdev, IORESOURCE_MEM, 0); 364f686e9afSMarc Dietrich if (!res) { 365f686e9afSMarc Dietrich dev_err(&pdev->dev, "no mem resource?\n"); 366f686e9afSMarc Dietrich return -ENODEV; 36732890b98SMarc Dietrich } 36832890b98SMarc Dietrich 369f686e9afSMarc Dietrich iomem = request_mem_region(res->start, resource_size(res), pdev->name); 370f686e9afSMarc Dietrich if (!iomem) { 371f686e9afSMarc Dietrich dev_err(&pdev->dev, "I2C region already claimed\n"); 372f686e9afSMarc Dietrich return -EBUSY; 37332890b98SMarc Dietrich } 37432890b98SMarc Dietrich 375f686e9afSMarc Dietrich base = ioremap(iomem->start, resource_size(iomem)); 376f686e9afSMarc Dietrich if (!base) { 377f686e9afSMarc Dietrich dev_err(&pdev->dev, "Can't ioremap I2C region\n"); 378f686e9afSMarc Dietrich return -ENOMEM; 379f686e9afSMarc Dietrich } 38032890b98SMarc Dietrich 381f686e9afSMarc Dietrich res = platform_get_resource(pdev, IORESOURCE_IRQ, 0); 382f686e9afSMarc Dietrich if (!res) { 383f686e9afSMarc Dietrich dev_err(&pdev->dev, "no irq resource?\n"); 384f686e9afSMarc Dietrich ret = -ENODEV; 385f686e9afSMarc Dietrich goto err_iounmap; 386f686e9afSMarc Dietrich } 387f686e9afSMarc Dietrich 388f686e9afSMarc Dietrich i2c_clk = clk_get_sys("tegra-i2c.2", NULL); 389f686e9afSMarc Dietrich if (IS_ERR(i2c_clk)) { 390f686e9afSMarc Dietrich dev_err(nvec->dev, "failed to get controller clock\n"); 391f686e9afSMarc Dietrich goto err_iounmap; 39232890b98SMarc Dietrich } 39332890b98SMarc Dietrich 394f686e9afSMarc Dietrich nvec->base = base; 395f686e9afSMarc Dietrich nvec->irq = res->start; 396f686e9afSMarc Dietrich nvec->i2c_clk = i2c_clk; 397f686e9afSMarc Dietrich 39832890b98SMarc Dietrich /* Set the gpio to low when we've got something to say */ 39932890b98SMarc Dietrich err = gpio_request(nvec->gpio, "nvec gpio"); 40032890b98SMarc Dietrich if (err < 0) 40132890b98SMarc Dietrich dev_err(nvec->dev, "couldn't request gpio\n"); 40232890b98SMarc Dietrich 40332890b98SMarc Dietrich ATOMIC_INIT_NOTIFIER_HEAD(&nvec->notifier_list); 40432890b98SMarc Dietrich 40532890b98SMarc Dietrich init_completion(&nvec->sync_write); 40632890b98SMarc Dietrich sema_init(&nvec->sync_write_mutex, 1); 40732890b98SMarc Dietrich INIT_LIST_HEAD(&nvec->tx_data); 40832890b98SMarc Dietrich INIT_LIST_HEAD(&nvec->rx_data); 40932890b98SMarc Dietrich INIT_WORK(&nvec->rx_work, nvec_dispatch); 41032890b98SMarc Dietrich INIT_WORK(&nvec->tx_work, nvec_request_master); 41132890b98SMarc Dietrich 412f686e9afSMarc Dietrich err = request_irq(nvec->irq, nvec_interrupt, 0, "nvec", nvec); 413f686e9afSMarc Dietrich if (err) { 414f686e9afSMarc Dietrich dev_err(nvec->dev, "couldn't request irq\n"); 415f686e9afSMarc Dietrich goto failed; 416f686e9afSMarc Dietrich } 417ac810759SMarc Dietrich disable_irq(nvec->irq); 418f686e9afSMarc Dietrich 419f686e9afSMarc Dietrich tegra_init_i2c_slave(nvec); 420f686e9afSMarc Dietrich 421ac810759SMarc Dietrich clk_enable(i2c_clk); 422ac810759SMarc Dietrich 423f686e9afSMarc Dietrich gpio_direction_output(nvec->gpio, 1); 424f686e9afSMarc Dietrich gpio_set_value(nvec->gpio, 1); 425f686e9afSMarc Dietrich 42632890b98SMarc Dietrich /* enable event reporting */ 42732890b98SMarc Dietrich nvec_write_async(nvec, EC_ENABLE_EVENT_REPORTING, 42832890b98SMarc Dietrich sizeof(EC_ENABLE_EVENT_REPORTING)); 42932890b98SMarc Dietrich 43032890b98SMarc Dietrich nvec->nvec_status_notifier.notifier_call = nvec_status_notifier; 43132890b98SMarc Dietrich nvec_register_notifier(nvec, &nvec->nvec_status_notifier, 0); 43232890b98SMarc Dietrich 43332890b98SMarc Dietrich nvec_power_handle = nvec; 43432890b98SMarc Dietrich pm_power_off = nvec_power_off; 43532890b98SMarc Dietrich 43632890b98SMarc Dietrich /* Get Firmware Version */ 43732890b98SMarc Dietrich msg = nvec_write_sync(nvec, EC_GET_FIRMWARE_VERSION, 43832890b98SMarc Dietrich sizeof(EC_GET_FIRMWARE_VERSION)); 43932890b98SMarc Dietrich 44032890b98SMarc Dietrich dev_warn(nvec->dev, "ec firmware version %02x.%02x.%02x / %02x\n", 44132890b98SMarc Dietrich msg->data[4], msg->data[5], msg->data[6], msg->data[7]); 44232890b98SMarc Dietrich 44332890b98SMarc Dietrich kfree(msg->data); 44432890b98SMarc Dietrich kfree(msg); 44532890b98SMarc Dietrich 446f686e9afSMarc Dietrich ret = mfd_add_devices(nvec->dev, -1, nvec_devices, 447f686e9afSMarc Dietrich ARRAY_SIZE(nvec_devices), base, 0); 448f686e9afSMarc Dietrich if (ret) 449f686e9afSMarc Dietrich dev_err(nvec->dev, "error adding subdevices\n"); 450f686e9afSMarc Dietrich 45132890b98SMarc Dietrich /* unmute speakers? */ 4526dca320cSMarc Dietrich nvec_write_async(nvec, "\x0d\x10\x59\x95", 4); 45332890b98SMarc Dietrich 45432890b98SMarc Dietrich /* enable lid switch event */ 45532890b98SMarc Dietrich nvec_write_async(nvec, "\x01\x01\x01\x00\x00\x02\x00", 7); 45632890b98SMarc Dietrich 45732890b98SMarc Dietrich /* enable power button event */ 45832890b98SMarc Dietrich nvec_write_async(nvec, "\x01\x01\x01\x00\x00\x80\x00", 7); 45932890b98SMarc Dietrich 46032890b98SMarc Dietrich return 0; 46132890b98SMarc Dietrich 462f686e9afSMarc Dietrich err_iounmap: 463f686e9afSMarc Dietrich iounmap(base); 46432890b98SMarc Dietrich failed: 46532890b98SMarc Dietrich kfree(nvec); 46632890b98SMarc Dietrich return -ENOMEM; 46732890b98SMarc Dietrich } 46832890b98SMarc Dietrich 46932890b98SMarc Dietrich static int __devexit tegra_nvec_remove(struct platform_device *pdev) 47032890b98SMarc Dietrich { 471f686e9afSMarc Dietrich struct nvec_chip *nvec = platform_get_drvdata(pdev); 472f686e9afSMarc Dietrich 473f686e9afSMarc Dietrich nvec_write_async(nvec, EC_DISABLE_EVENT_REPORTING, 3); 474f686e9afSMarc Dietrich mfd_remove_devices(nvec->dev); 475f686e9afSMarc Dietrich free_irq(nvec->irq, &nvec_interrupt); 476f686e9afSMarc Dietrich iounmap(nvec->base); 477f686e9afSMarc Dietrich gpio_free(nvec->gpio); 478f686e9afSMarc Dietrich kfree(nvec); 479f686e9afSMarc Dietrich 48032890b98SMarc Dietrich return 0; 48132890b98SMarc Dietrich } 48232890b98SMarc Dietrich 48332890b98SMarc Dietrich #ifdef CONFIG_PM 48432890b98SMarc Dietrich 48532890b98SMarc Dietrich static int tegra_nvec_suspend(struct platform_device *pdev, pm_message_t state) 48632890b98SMarc Dietrich { 48732890b98SMarc Dietrich struct nvec_chip *nvec = platform_get_drvdata(pdev); 48832890b98SMarc Dietrich 48932890b98SMarc Dietrich dev_dbg(nvec->dev, "suspending\n"); 49032890b98SMarc Dietrich nvec_write_async(nvec, EC_DISABLE_EVENT_REPORTING, 3); 49132890b98SMarc Dietrich nvec_write_async(nvec, "\x04\x02", 2); 492ac810759SMarc Dietrich nvec_disable_i2c_slave(nvec); 49332890b98SMarc Dietrich 49432890b98SMarc Dietrich return 0; 49532890b98SMarc Dietrich } 49632890b98SMarc Dietrich 497162c7d8cSMarc Dietrich static int tegra_nvec_resume(struct platform_device *pdev) 498162c7d8cSMarc Dietrich { 49932890b98SMarc Dietrich struct nvec_chip *nvec = platform_get_drvdata(pdev); 50032890b98SMarc Dietrich 50132890b98SMarc Dietrich dev_dbg(nvec->dev, "resuming\n"); 502f686e9afSMarc Dietrich tegra_init_i2c_slave(nvec); 50332890b98SMarc Dietrich nvec_write_async(nvec, EC_ENABLE_EVENT_REPORTING, 3); 50432890b98SMarc Dietrich 50532890b98SMarc Dietrich return 0; 50632890b98SMarc Dietrich } 50732890b98SMarc Dietrich 50832890b98SMarc Dietrich #else 50932890b98SMarc Dietrich #define tegra_nvec_suspend NULL 51032890b98SMarc Dietrich #define tegra_nvec_resume NULL 51132890b98SMarc Dietrich #endif 51232890b98SMarc Dietrich 513162c7d8cSMarc Dietrich static struct platform_driver nvec_device_driver = { 51432890b98SMarc Dietrich .probe = tegra_nvec_probe, 51532890b98SMarc Dietrich .remove = __devexit_p(tegra_nvec_remove), 51632890b98SMarc Dietrich .suspend = tegra_nvec_suspend, 51732890b98SMarc Dietrich .resume = tegra_nvec_resume, 51832890b98SMarc Dietrich .driver = { 51932890b98SMarc Dietrich .name = "nvec", 52032890b98SMarc Dietrich .owner = THIS_MODULE, 52132890b98SMarc Dietrich } 52232890b98SMarc Dietrich }; 52332890b98SMarc Dietrich 52432890b98SMarc Dietrich static int __init tegra_nvec_init(void) 52532890b98SMarc Dietrich { 52632890b98SMarc Dietrich return platform_driver_register(&nvec_device_driver); 52732890b98SMarc Dietrich } 52832890b98SMarc Dietrich 52932890b98SMarc Dietrich module_init(tegra_nvec_init); 530162c7d8cSMarc Dietrich 53132890b98SMarc Dietrich MODULE_ALIAS("platform:nvec"); 532162c7d8cSMarc Dietrich MODULE_DESCRIPTION("NVIDIA compliant embedded controller interface"); 533162c7d8cSMarc Dietrich MODULE_AUTHOR("Marc Dietrich <marvin24@gmx.de>"); 534162c7d8cSMarc Dietrich MODULE_LICENSE("GPL"); 535