nvec.c revision 162c7d8c4be2d599583c42c2a8fe99bed6d87f67
1162c7d8c4be2d599583c42c2a8fe99bed6d87f67Marc Dietrich/* 2162c7d8c4be2d599583c42c2a8fe99bed6d87f67Marc Dietrich * NVEC: NVIDIA compliant embedded controller interface 3162c7d8c4be2d599583c42c2a8fe99bed6d87f67Marc Dietrich * 4162c7d8c4be2d599583c42c2a8fe99bed6d87f67Marc Dietrich * Copyright (C) 2011 The AC100 Kernel Team <ac100@lists.lauchpad.net> 5162c7d8c4be2d599583c42c2a8fe99bed6d87f67Marc Dietrich * 6162c7d8c4be2d599583c42c2a8fe99bed6d87f67Marc Dietrich * Authors: Pierre-Hugues Husson <phhusson@free.fr> 7162c7d8c4be2d599583c42c2a8fe99bed6d87f67Marc Dietrich * Ilya Petrov <ilya.muromec@gmail.com> 8162c7d8c4be2d599583c42c2a8fe99bed6d87f67Marc Dietrich * Marc Dietrich <marvin24@gmx.de> 9162c7d8c4be2d599583c42c2a8fe99bed6d87f67Marc Dietrich * 10162c7d8c4be2d599583c42c2a8fe99bed6d87f67Marc Dietrich * This file is subject to the terms and conditions of the GNU General Public 11162c7d8c4be2d599583c42c2a8fe99bed6d87f67Marc Dietrich * License. See the file "COPYING" in the main directory of this archive 12162c7d8c4be2d599583c42c2a8fe99bed6d87f67Marc Dietrich * for more details. 13162c7d8c4be2d599583c42c2a8fe99bed6d87f67Marc Dietrich * 14162c7d8c4be2d599583c42c2a8fe99bed6d87f67Marc Dietrich */ 15162c7d8c4be2d599583c42c2a8fe99bed6d87f67Marc Dietrich 16162c7d8c4be2d599583c42c2a8fe99bed6d87f67Marc Dietrich/* #define DEBUG */ 1732890b983086136fef8721363a2d3860f337ad53Marc Dietrich 1832890b983086136fef8721363a2d3860f337ad53Marc Dietrich#include <asm/irq.h> 19162c7d8c4be2d599583c42c2a8fe99bed6d87f67Marc Dietrich 2032890b983086136fef8721363a2d3860f337ad53Marc Dietrich#include <linux/completion.h> 2132890b983086136fef8721363a2d3860f337ad53Marc Dietrich#include <linux/interrupt.h> 22162c7d8c4be2d599583c42c2a8fe99bed6d87f67Marc Dietrich#include <linux/io.h> 2332890b983086136fef8721363a2d3860f337ad53Marc Dietrich#include <linux/irq.h> 2432890b983086136fef8721363a2d3860f337ad53Marc Dietrich#include <linux/slab.h> 2532890b983086136fef8721363a2d3860f337ad53Marc Dietrich#include <linux/gpio.h> 2632890b983086136fef8721363a2d3860f337ad53Marc Dietrich#include <linux/serio.h> 2732890b983086136fef8721363a2d3860f337ad53Marc Dietrich#include <linux/delay.h> 2832890b983086136fef8721363a2d3860f337ad53Marc Dietrich#include <linux/input.h> 2932890b983086136fef8721363a2d3860f337ad53Marc Dietrich#include <linux/workqueue.h> 3032890b983086136fef8721363a2d3860f337ad53Marc Dietrich#include <linux/clk.h> 31162c7d8c4be2d599583c42c2a8fe99bed6d87f67Marc Dietrich 3232890b983086136fef8721363a2d3860f337ad53Marc Dietrich#include <linux/semaphore.h> 3332890b983086136fef8721363a2d3860f337ad53Marc Dietrich#include <linux/list.h> 3432890b983086136fef8721363a2d3860f337ad53Marc Dietrich#include <linux/notifier.h> 3532890b983086136fef8721363a2d3860f337ad53Marc Dietrich#include <linux/platform_device.h> 36f686e9affba24cfdf94fb155aaeb36a1e14719f1Marc Dietrich#include <linux/mfd/core.h> 37162c7d8c4be2d599583c42c2a8fe99bed6d87f67Marc Dietrich 38162c7d8c4be2d599583c42c2a8fe99bed6d87f67Marc Dietrich#include <mach/iomap.h> 39162c7d8c4be2d599583c42c2a8fe99bed6d87f67Marc Dietrich#include <mach/clk.h> 40162c7d8c4be2d599583c42c2a8fe99bed6d87f67Marc Dietrich 4132890b983086136fef8721363a2d3860f337ad53Marc Dietrich#include "nvec.h" 4232890b983086136fef8721363a2d3860f337ad53Marc Dietrich 43162c7d8c4be2d599583c42c2a8fe99bed6d87f67Marc Dietrichstatic const unsigned char EC_DISABLE_EVENT_REPORTING[3] = "\x04\x00\x00"; 44162c7d8c4be2d599583c42c2a8fe99bed6d87f67Marc Dietrichstatic const unsigned char EC_ENABLE_EVENT_REPORTING[3] = "\x04\x00\x01"; 45162c7d8c4be2d599583c42c2a8fe99bed6d87f67Marc Dietrichstatic const unsigned char EC_GET_FIRMWARE_VERSION[2] = "\x07\x15"; 4632890b983086136fef8721363a2d3860f337ad53Marc Dietrich 4732890b983086136fef8721363a2d3860f337ad53Marc Dietrichstatic struct nvec_chip *nvec_power_handle; 4832890b983086136fef8721363a2d3860f337ad53Marc Dietrich 49f686e9affba24cfdf94fb155aaeb36a1e14719f1Marc Dietrichstatic struct mfd_cell nvec_devices[] = { 50f686e9affba24cfdf94fb155aaeb36a1e14719f1Marc Dietrich { 51162c7d8c4be2d599583c42c2a8fe99bed6d87f67Marc Dietrich .name = "nvec-kbd", 52162c7d8c4be2d599583c42c2a8fe99bed6d87f67Marc Dietrich .id = 1, 53f686e9affba24cfdf94fb155aaeb36a1e14719f1Marc Dietrich }, 54f686e9affba24cfdf94fb155aaeb36a1e14719f1Marc Dietrich { 55162c7d8c4be2d599583c42c2a8fe99bed6d87f67Marc Dietrich .name = "nvec-mouse", 56162c7d8c4be2d599583c42c2a8fe99bed6d87f67Marc Dietrich .id = 1, 57f686e9affba24cfdf94fb155aaeb36a1e14719f1Marc Dietrich }, 58f686e9affba24cfdf94fb155aaeb36a1e14719f1Marc Dietrich { 59162c7d8c4be2d599583c42c2a8fe99bed6d87f67Marc Dietrich .name = "nvec-power", 60162c7d8c4be2d599583c42c2a8fe99bed6d87f67Marc Dietrich .id = 1, 61f686e9affba24cfdf94fb155aaeb36a1e14719f1Marc Dietrich }, 62f686e9affba24cfdf94fb155aaeb36a1e14719f1Marc Dietrich { 63162c7d8c4be2d599583c42c2a8fe99bed6d87f67Marc Dietrich .name = "nvec-power", 64162c7d8c4be2d599583c42c2a8fe99bed6d87f67Marc Dietrich .id = 2, 65f686e9affba24cfdf94fb155aaeb36a1e14719f1Marc Dietrich }, 66f686e9affba24cfdf94fb155aaeb36a1e14719f1Marc Dietrich}; 67f686e9affba24cfdf94fb155aaeb36a1e14719f1Marc Dietrich 6832890b983086136fef8721363a2d3860f337ad53Marc Dietrichint nvec_register_notifier(struct nvec_chip *nvec, struct notifier_block *nb, 69162c7d8c4be2d599583c42c2a8fe99bed6d87f67Marc Dietrich unsigned int events) 7032890b983086136fef8721363a2d3860f337ad53Marc Dietrich{ 7132890b983086136fef8721363a2d3860f337ad53Marc Dietrich return atomic_notifier_chain_register(&nvec->notifier_list, nb); 7232890b983086136fef8721363a2d3860f337ad53Marc Dietrich} 7332890b983086136fef8721363a2d3860f337ad53Marc DietrichEXPORT_SYMBOL_GPL(nvec_register_notifier); 7432890b983086136fef8721363a2d3860f337ad53Marc Dietrich 75162c7d8c4be2d599583c42c2a8fe99bed6d87f67Marc Dietrichstatic int nvec_status_notifier(struct notifier_block *nb, 76162c7d8c4be2d599583c42c2a8fe99bed6d87f67Marc Dietrich unsigned long event_type, void *data) 7732890b983086136fef8721363a2d3860f337ad53Marc Dietrich{ 7832890b983086136fef8721363a2d3860f337ad53Marc Dietrich unsigned char *msg = (unsigned char *)data; 7932890b983086136fef8721363a2d3860f337ad53Marc Dietrich int i; 8032890b983086136fef8721363a2d3860f337ad53Marc Dietrich 81162c7d8c4be2d599583c42c2a8fe99bed6d87f67Marc Dietrich if (event_type != NVEC_CNTL) 8232890b983086136fef8721363a2d3860f337ad53Marc Dietrich return NOTIFY_DONE; 8332890b983086136fef8721363a2d3860f337ad53Marc Dietrich 84162c7d8c4be2d599583c42c2a8fe99bed6d87f67Marc Dietrich printk(KERN_WARNING "unhandled msg type %ld, payload: ", event_type); 8532890b983086136fef8721363a2d3860f337ad53Marc Dietrich for (i = 0; i < msg[1]; i++) 8632890b983086136fef8721363a2d3860f337ad53Marc Dietrich printk("%0x ", msg[i+2]); 8732890b983086136fef8721363a2d3860f337ad53Marc Dietrich printk("\n"); 8832890b983086136fef8721363a2d3860f337ad53Marc Dietrich 8932890b983086136fef8721363a2d3860f337ad53Marc Dietrich return NOTIFY_OK; 9032890b983086136fef8721363a2d3860f337ad53Marc Dietrich} 9132890b983086136fef8721363a2d3860f337ad53Marc Dietrich 92162c7d8c4be2d599583c42c2a8fe99bed6d87f67Marc Dietrichvoid nvec_write_async(struct nvec_chip *nvec, const unsigned char *data, 93162c7d8c4be2d599583c42c2a8fe99bed6d87f67Marc Dietrich short size) 9432890b983086136fef8721363a2d3860f337ad53Marc Dietrich{ 9532890b983086136fef8721363a2d3860f337ad53Marc Dietrich struct nvec_msg *msg = kzalloc(sizeof(struct nvec_msg), GFP_NOWAIT); 9632890b983086136fef8721363a2d3860f337ad53Marc Dietrich 9732890b983086136fef8721363a2d3860f337ad53Marc Dietrich msg->data = kzalloc(size, GFP_NOWAIT); 9832890b983086136fef8721363a2d3860f337ad53Marc Dietrich msg->data[0] = size; 9932890b983086136fef8721363a2d3860f337ad53Marc Dietrich memcpy(msg->data + 1, data, size); 10032890b983086136fef8721363a2d3860f337ad53Marc Dietrich msg->size = size + 1; 10132890b983086136fef8721363a2d3860f337ad53Marc Dietrich msg->pos = 0; 10232890b983086136fef8721363a2d3860f337ad53Marc Dietrich INIT_LIST_HEAD(&msg->node); 10332890b983086136fef8721363a2d3860f337ad53Marc Dietrich 10432890b983086136fef8721363a2d3860f337ad53Marc Dietrich list_add_tail(&msg->node, &nvec->tx_data); 10532890b983086136fef8721363a2d3860f337ad53Marc Dietrich 10632890b983086136fef8721363a2d3860f337ad53Marc Dietrich gpio_set_value(nvec->gpio, 0); 10732890b983086136fef8721363a2d3860f337ad53Marc Dietrich} 10832890b983086136fef8721363a2d3860f337ad53Marc DietrichEXPORT_SYMBOL(nvec_write_async); 10932890b983086136fef8721363a2d3860f337ad53Marc Dietrich 11032890b983086136fef8721363a2d3860f337ad53Marc Dietrichstatic void nvec_request_master(struct work_struct *work) 11132890b983086136fef8721363a2d3860f337ad53Marc Dietrich{ 11232890b983086136fef8721363a2d3860f337ad53Marc Dietrich struct nvec_chip *nvec = container_of(work, struct nvec_chip, tx_work); 11332890b983086136fef8721363a2d3860f337ad53Marc Dietrich 114162c7d8c4be2d599583c42c2a8fe99bed6d87f67Marc Dietrich if (!list_empty(&nvec->tx_data)) 11532890b983086136fef8721363a2d3860f337ad53Marc Dietrich gpio_set_value(nvec->gpio, 0); 11632890b983086136fef8721363a2d3860f337ad53Marc Dietrich} 11732890b983086136fef8721363a2d3860f337ad53Marc Dietrich 11832890b983086136fef8721363a2d3860f337ad53Marc Dietrichstatic int parse_msg(struct nvec_chip *nvec, struct nvec_msg *msg) 11932890b983086136fef8721363a2d3860f337ad53Marc Dietrich{ 12032890b983086136fef8721363a2d3860f337ad53Marc Dietrich int i; 12132890b983086136fef8721363a2d3860f337ad53Marc Dietrich 122162c7d8c4be2d599583c42c2a8fe99bed6d87f67Marc Dietrich if ((msg->data[0] & 1 << 7) == 0 && msg->data[3]) { 123162c7d8c4be2d599583c42c2a8fe99bed6d87f67Marc Dietrich dev_err(nvec->dev, "ec responded %02x %02x %02x %02x\n", 124162c7d8c4be2d599583c42c2a8fe99bed6d87f67Marc Dietrich msg->data[0], msg->data[1], msg->data[2], msg->data[3]); 12532890b983086136fef8721363a2d3860f337ad53Marc Dietrich return -EINVAL; 12632890b983086136fef8721363a2d3860f337ad53Marc Dietrich } 12732890b983086136fef8721363a2d3860f337ad53Marc Dietrich 128162c7d8c4be2d599583c42c2a8fe99bed6d87f67Marc Dietrich if ((msg->data[0] >> 7) == 1 && (msg->data[0] & 0x0f) == 5) { 12932890b983086136fef8721363a2d3860f337ad53Marc Dietrich dev_warn(nvec->dev, "ec system event "); 130162c7d8c4be2d599583c42c2a8fe99bed6d87f67Marc Dietrich for (i = 0; i < msg->data[1]; i++) 13132890b983086136fef8721363a2d3860f337ad53Marc Dietrich dev_warn(nvec->dev, "%02x ", msg->data[2+i]); 13232890b983086136fef8721363a2d3860f337ad53Marc Dietrich dev_warn(nvec->dev, "\n"); 13332890b983086136fef8721363a2d3860f337ad53Marc Dietrich } 13432890b983086136fef8721363a2d3860f337ad53Marc Dietrich 135162c7d8c4be2d599583c42c2a8fe99bed6d87f67Marc Dietrich atomic_notifier_call_chain(&nvec->notifier_list, msg->data[0] & 0x8f, 136162c7d8c4be2d599583c42c2a8fe99bed6d87f67Marc Dietrich msg->data); 13732890b983086136fef8721363a2d3860f337ad53Marc Dietrich 13832890b983086136fef8721363a2d3860f337ad53Marc Dietrich return 0; 13932890b983086136fef8721363a2d3860f337ad53Marc Dietrich} 14032890b983086136fef8721363a2d3860f337ad53Marc Dietrich 141162c7d8c4be2d599583c42c2a8fe99bed6d87f67Marc Dietrichstatic struct nvec_msg *nvec_write_sync(struct nvec_chip *nvec, 142162c7d8c4be2d599583c42c2a8fe99bed6d87f67Marc Dietrich const unsigned char *data, short size) 14332890b983086136fef8721363a2d3860f337ad53Marc Dietrich{ 14432890b983086136fef8721363a2d3860f337ad53Marc Dietrich down(&nvec->sync_write_mutex); 14532890b983086136fef8721363a2d3860f337ad53Marc Dietrich 14632890b983086136fef8721363a2d3860f337ad53Marc Dietrich nvec->sync_write_pending = (data[1] << 8) + data[0]; 14732890b983086136fef8721363a2d3860f337ad53Marc Dietrich nvec_write_async(nvec, data, size); 14832890b983086136fef8721363a2d3860f337ad53Marc Dietrich 149162c7d8c4be2d599583c42c2a8fe99bed6d87f67Marc Dietrich dev_dbg(nvec->dev, "nvec_sync_write: 0x%04x\n", 150162c7d8c4be2d599583c42c2a8fe99bed6d87f67Marc Dietrich nvec->sync_write_pending); 15132890b983086136fef8721363a2d3860f337ad53Marc Dietrich wait_for_completion(&nvec->sync_write); 15232890b983086136fef8721363a2d3860f337ad53Marc Dietrich dev_dbg(nvec->dev, "nvec_sync_write: pong!\n"); 15332890b983086136fef8721363a2d3860f337ad53Marc Dietrich 15432890b983086136fef8721363a2d3860f337ad53Marc Dietrich up(&nvec->sync_write_mutex); 15532890b983086136fef8721363a2d3860f337ad53Marc Dietrich 15632890b983086136fef8721363a2d3860f337ad53Marc Dietrich return nvec->last_sync_msg; 15732890b983086136fef8721363a2d3860f337ad53Marc Dietrich} 15832890b983086136fef8721363a2d3860f337ad53Marc Dietrich 15932890b983086136fef8721363a2d3860f337ad53Marc Dietrich/* RX worker */ 16032890b983086136fef8721363a2d3860f337ad53Marc Dietrichstatic void nvec_dispatch(struct work_struct *work) 16132890b983086136fef8721363a2d3860f337ad53Marc Dietrich{ 16232890b983086136fef8721363a2d3860f337ad53Marc Dietrich struct nvec_chip *nvec = container_of(work, struct nvec_chip, rx_work); 16332890b983086136fef8721363a2d3860f337ad53Marc Dietrich struct nvec_msg *msg; 16432890b983086136fef8721363a2d3860f337ad53Marc Dietrich 165162c7d8c4be2d599583c42c2a8fe99bed6d87f67Marc Dietrich while (!list_empty(&nvec->rx_data)) { 16632890b983086136fef8721363a2d3860f337ad53Marc Dietrich msg = list_first_entry(&nvec->rx_data, struct nvec_msg, node); 16732890b983086136fef8721363a2d3860f337ad53Marc Dietrich list_del_init(&msg->node); 16832890b983086136fef8721363a2d3860f337ad53Marc Dietrich 169162c7d8c4be2d599583c42c2a8fe99bed6d87f67Marc Dietrich if (nvec->sync_write_pending == 170162c7d8c4be2d599583c42c2a8fe99bed6d87f67Marc Dietrich (msg->data[2] << 8) + msg->data[0]) { 17132890b983086136fef8721363a2d3860f337ad53Marc Dietrich dev_dbg(nvec->dev, "sync write completed!\n"); 17232890b983086136fef8721363a2d3860f337ad53Marc Dietrich nvec->sync_write_pending = 0; 17332890b983086136fef8721363a2d3860f337ad53Marc Dietrich nvec->last_sync_msg = msg; 17432890b983086136fef8721363a2d3860f337ad53Marc Dietrich complete(&nvec->sync_write); 17532890b983086136fef8721363a2d3860f337ad53Marc Dietrich } else { 17632890b983086136fef8721363a2d3860f337ad53Marc Dietrich parse_msg(nvec, msg); 177162c7d8c4be2d599583c42c2a8fe99bed6d87f67Marc Dietrich if ((!msg) || (!msg->data)) 178162c7d8c4be2d599583c42c2a8fe99bed6d87f67Marc Dietrich dev_warn(nvec->dev, 179162c7d8c4be2d599583c42c2a8fe99bed6d87f67Marc Dietrich "attempt access zero pointer\n"); 18032890b983086136fef8721363a2d3860f337ad53Marc Dietrich else { 18132890b983086136fef8721363a2d3860f337ad53Marc Dietrich kfree(msg->data); 18232890b983086136fef8721363a2d3860f337ad53Marc Dietrich kfree(msg); 18332890b983086136fef8721363a2d3860f337ad53Marc Dietrich } 18432890b983086136fef8721363a2d3860f337ad53Marc Dietrich } 18532890b983086136fef8721363a2d3860f337ad53Marc Dietrich } 18632890b983086136fef8721363a2d3860f337ad53Marc Dietrich} 18732890b983086136fef8721363a2d3860f337ad53Marc Dietrich 188f686e9affba24cfdf94fb155aaeb36a1e14719f1Marc Dietrichstatic irqreturn_t nvec_interrupt(int irq, void *dev) 18932890b983086136fef8721363a2d3860f337ad53Marc Dietrich{ 19032890b983086136fef8721363a2d3860f337ad53Marc Dietrich unsigned long status; 19132890b983086136fef8721363a2d3860f337ad53Marc Dietrich unsigned long received; 19232890b983086136fef8721363a2d3860f337ad53Marc Dietrich unsigned char to_send; 19332890b983086136fef8721363a2d3860f337ad53Marc Dietrich struct nvec_msg *msg; 19432890b983086136fef8721363a2d3860f337ad53Marc Dietrich struct nvec_chip *nvec = (struct nvec_chip *)dev; 195f686e9affba24cfdf94fb155aaeb36a1e14719f1Marc Dietrich void __iomem *base = nvec->base; 19632890b983086136fef8721363a2d3860f337ad53Marc Dietrich 197f686e9affba24cfdf94fb155aaeb36a1e14719f1Marc Dietrich status = readl(base + I2C_SL_STATUS); 19832890b983086136fef8721363a2d3860f337ad53Marc Dietrich 199162c7d8c4be2d599583c42c2a8fe99bed6d87f67Marc Dietrich if (!(status & I2C_SL_IRQ)) { 20032890b983086136fef8721363a2d3860f337ad53Marc Dietrich dev_warn(nvec->dev, "nvec Spurious IRQ\n"); 20132890b983086136fef8721363a2d3860f337ad53Marc Dietrich goto handled; 20232890b983086136fef8721363a2d3860f337ad53Marc Dietrich } 203162c7d8c4be2d599583c42c2a8fe99bed6d87f67Marc Dietrich if (status & END_TRANS && !(status & RCVD)) { 20432890b983086136fef8721363a2d3860f337ad53Marc Dietrich nvec->state = NVEC_WAIT; 205162c7d8c4be2d599583c42c2a8fe99bed6d87f67Marc Dietrich if (nvec->rx->size > 1) { 20632890b983086136fef8721363a2d3860f337ad53Marc Dietrich list_add_tail(&nvec->rx->node, &nvec->rx_data); 20732890b983086136fef8721363a2d3860f337ad53Marc Dietrich schedule_work(&nvec->rx_work); 20832890b983086136fef8721363a2d3860f337ad53Marc Dietrich } else { 20932890b983086136fef8721363a2d3860f337ad53Marc Dietrich kfree(nvec->rx->data); 21032890b983086136fef8721363a2d3860f337ad53Marc Dietrich kfree(nvec->rx); 21132890b983086136fef8721363a2d3860f337ad53Marc Dietrich } 21232890b983086136fef8721363a2d3860f337ad53Marc Dietrich return IRQ_HANDLED; 213162c7d8c4be2d599583c42c2a8fe99bed6d87f67Marc Dietrich } else if (status & RNW) { 214162c7d8c4be2d599583c42c2a8fe99bed6d87f67Marc Dietrich if (status & RCVD) 21532890b983086136fef8721363a2d3860f337ad53Marc Dietrich udelay(3); 21632890b983086136fef8721363a2d3860f337ad53Marc Dietrich 217162c7d8c4be2d599583c42c2a8fe99bed6d87f67Marc Dietrich if (status & RCVD) 21832890b983086136fef8721363a2d3860f337ad53Marc Dietrich nvec->state = NVEC_WRITE; 219162c7d8c4be2d599583c42c2a8fe99bed6d87f67Marc Dietrich 220162c7d8c4be2d599583c42c2a8fe99bed6d87f67Marc Dietrich if (list_empty(&nvec->tx_data)) { 22132890b983086136fef8721363a2d3860f337ad53Marc Dietrich dev_err(nvec->dev, "nvec empty tx - sending no-op\n"); 22232890b983086136fef8721363a2d3860f337ad53Marc Dietrich to_send = 0x8a; 22332890b983086136fef8721363a2d3860f337ad53Marc Dietrich nvec_write_async(nvec, "\x07\x02", 2); 22432890b983086136fef8721363a2d3860f337ad53Marc Dietrich } else { 225162c7d8c4be2d599583c42c2a8fe99bed6d87f67Marc Dietrich msg = 226162c7d8c4be2d599583c42c2a8fe99bed6d87f67Marc Dietrich list_first_entry(&nvec->tx_data, struct nvec_msg, 227162c7d8c4be2d599583c42c2a8fe99bed6d87f67Marc Dietrich node); 228162c7d8c4be2d599583c42c2a8fe99bed6d87f67Marc Dietrich if (msg->pos < msg->size) { 22932890b983086136fef8721363a2d3860f337ad53Marc Dietrich to_send = msg->data[msg->pos]; 23032890b983086136fef8721363a2d3860f337ad53Marc Dietrich msg->pos++; 23132890b983086136fef8721363a2d3860f337ad53Marc Dietrich } else { 232162c7d8c4be2d599583c42c2a8fe99bed6d87f67Marc Dietrich dev_err(nvec->dev, "nvec crap! %d\n", 233162c7d8c4be2d599583c42c2a8fe99bed6d87f67Marc Dietrich msg->size); 23432890b983086136fef8721363a2d3860f337ad53Marc Dietrich to_send = 0x01; 23532890b983086136fef8721363a2d3860f337ad53Marc Dietrich } 23632890b983086136fef8721363a2d3860f337ad53Marc Dietrich 237162c7d8c4be2d599583c42c2a8fe99bed6d87f67Marc Dietrich if (msg->pos >= msg->size) { 23832890b983086136fef8721363a2d3860f337ad53Marc Dietrich list_del_init(&msg->node); 23932890b983086136fef8721363a2d3860f337ad53Marc Dietrich kfree(msg->data); 24032890b983086136fef8721363a2d3860f337ad53Marc Dietrich kfree(msg); 24132890b983086136fef8721363a2d3860f337ad53Marc Dietrich schedule_work(&nvec->tx_work); 24232890b983086136fef8721363a2d3860f337ad53Marc Dietrich nvec->state = NVEC_WAIT; 24332890b983086136fef8721363a2d3860f337ad53Marc Dietrich } 24432890b983086136fef8721363a2d3860f337ad53Marc Dietrich } 245f686e9affba24cfdf94fb155aaeb36a1e14719f1Marc Dietrich writel(to_send, base + I2C_SL_RCVD); 24632890b983086136fef8721363a2d3860f337ad53Marc Dietrich 24732890b983086136fef8721363a2d3860f337ad53Marc Dietrich gpio_set_value(nvec->gpio, 1); 24832890b983086136fef8721363a2d3860f337ad53Marc Dietrich 24932890b983086136fef8721363a2d3860f337ad53Marc Dietrich dev_dbg(nvec->dev, "nvec sent %x\n", to_send); 25032890b983086136fef8721363a2d3860f337ad53Marc Dietrich 25132890b983086136fef8721363a2d3860f337ad53Marc Dietrich goto handled; 25232890b983086136fef8721363a2d3860f337ad53Marc Dietrich } else { 253f686e9affba24cfdf94fb155aaeb36a1e14719f1Marc Dietrich received = readl(base + I2C_SL_RCVD); 254162c7d8c4be2d599583c42c2a8fe99bed6d87f67Marc Dietrich 255162c7d8c4be2d599583c42c2a8fe99bed6d87f67Marc Dietrich if (status & RCVD) { 256f686e9affba24cfdf94fb155aaeb36a1e14719f1Marc Dietrich writel(0, base + I2C_SL_RCVD); 25732890b983086136fef8721363a2d3860f337ad53Marc Dietrich goto handled; 25832890b983086136fef8721363a2d3860f337ad53Marc Dietrich } 25932890b983086136fef8721363a2d3860f337ad53Marc Dietrich 260162c7d8c4be2d599583c42c2a8fe99bed6d87f67Marc Dietrich if (nvec->state == NVEC_WAIT) { 26132890b983086136fef8721363a2d3860f337ad53Marc Dietrich nvec->state = NVEC_READ; 26232890b983086136fef8721363a2d3860f337ad53Marc Dietrich msg = kzalloc(sizeof(struct nvec_msg), GFP_NOWAIT); 26332890b983086136fef8721363a2d3860f337ad53Marc Dietrich msg->data = kzalloc(32, GFP_NOWAIT); 26432890b983086136fef8721363a2d3860f337ad53Marc Dietrich INIT_LIST_HEAD(&msg->node); 26532890b983086136fef8721363a2d3860f337ad53Marc Dietrich nvec->rx = msg; 26632890b983086136fef8721363a2d3860f337ad53Marc Dietrich } else 26732890b983086136fef8721363a2d3860f337ad53Marc Dietrich msg = nvec->rx; 26832890b983086136fef8721363a2d3860f337ad53Marc Dietrich 26932890b983086136fef8721363a2d3860f337ad53Marc Dietrich BUG_ON(msg->pos > 32); 27032890b983086136fef8721363a2d3860f337ad53Marc Dietrich 27132890b983086136fef8721363a2d3860f337ad53Marc Dietrich msg->data[msg->pos] = received; 27232890b983086136fef8721363a2d3860f337ad53Marc Dietrich msg->pos++; 27332890b983086136fef8721363a2d3860f337ad53Marc Dietrich msg->size = msg->pos; 274162c7d8c4be2d599583c42c2a8fe99bed6d87f67Marc Dietrich dev_dbg(nvec->dev, "Got %02lx from Master (pos: %d)!\n", 275162c7d8c4be2d599583c42c2a8fe99bed6d87f67Marc Dietrich received, msg->pos); 27632890b983086136fef8721363a2d3860f337ad53Marc Dietrich } 27732890b983086136fef8721363a2d3860f337ad53Marc Dietrichhandled: 27832890b983086136fef8721363a2d3860f337ad53Marc Dietrich return IRQ_HANDLED; 27932890b983086136fef8721363a2d3860f337ad53Marc Dietrich} 28032890b983086136fef8721363a2d3860f337ad53Marc Dietrich 281f686e9affba24cfdf94fb155aaeb36a1e14719f1Marc Dietrichstatic void tegra_init_i2c_slave(struct nvec_chip *nvec) 28232890b983086136fef8721363a2d3860f337ad53Marc Dietrich{ 28332890b983086136fef8721363a2d3860f337ad53Marc Dietrich u32 val; 28432890b983086136fef8721363a2d3860f337ad53Marc Dietrich 285f686e9affba24cfdf94fb155aaeb36a1e14719f1Marc Dietrich clk_enable(nvec->i2c_clk); 286f686e9affba24cfdf94fb155aaeb36a1e14719f1Marc Dietrich 287f686e9affba24cfdf94fb155aaeb36a1e14719f1Marc Dietrich tegra_periph_reset_assert(nvec->i2c_clk); 28832890b983086136fef8721363a2d3860f337ad53Marc Dietrich udelay(2); 289f686e9affba24cfdf94fb155aaeb36a1e14719f1Marc Dietrich tegra_periph_reset_deassert(nvec->i2c_clk); 29032890b983086136fef8721363a2d3860f337ad53Marc Dietrich 291f686e9affba24cfdf94fb155aaeb36a1e14719f1Marc Dietrich writel(nvec->i2c_addr>>1, nvec->base + I2C_SL_ADDR1); 292f686e9affba24cfdf94fb155aaeb36a1e14719f1Marc Dietrich writel(0, nvec->base + I2C_SL_ADDR2); 29332890b983086136fef8721363a2d3860f337ad53Marc Dietrich 294f686e9affba24cfdf94fb155aaeb36a1e14719f1Marc Dietrich writel(0x1E, nvec->base + I2C_SL_DELAY_COUNT); 29532890b983086136fef8721363a2d3860f337ad53Marc Dietrich val = I2C_CNFG_NEW_MASTER_SFM | I2C_CNFG_PACKET_MODE_EN | 29632890b983086136fef8721363a2d3860f337ad53Marc Dietrich (0x2 << I2C_CNFG_DEBOUNCE_CNT_SHIFT); 297f686e9affba24cfdf94fb155aaeb36a1e14719f1Marc Dietrich writel(val, nvec->base + I2C_CNFG); 298f686e9affba24cfdf94fb155aaeb36a1e14719f1Marc Dietrich writel(I2C_SL_NEWL, nvec->base + I2C_SL_CNFG); 29932890b983086136fef8721363a2d3860f337ad53Marc Dietrich 300f686e9affba24cfdf94fb155aaeb36a1e14719f1Marc Dietrich clk_disable(nvec->i2c_clk); 30132890b983086136fef8721363a2d3860f337ad53Marc Dietrich} 30232890b983086136fef8721363a2d3860f337ad53Marc Dietrich 30332890b983086136fef8721363a2d3860f337ad53Marc Dietrichstatic void nvec_power_off(void) 30432890b983086136fef8721363a2d3860f337ad53Marc Dietrich{ 30532890b983086136fef8721363a2d3860f337ad53Marc Dietrich nvec_write_async(nvec_power_handle, EC_DISABLE_EVENT_REPORTING, 3); 30632890b983086136fef8721363a2d3860f337ad53Marc Dietrich nvec_write_async(nvec_power_handle, "\x04\x01", 2); 30732890b983086136fef8721363a2d3860f337ad53Marc Dietrich} 30832890b983086136fef8721363a2d3860f337ad53Marc Dietrich 30932890b983086136fef8721363a2d3860f337ad53Marc Dietrichstatic int __devinit tegra_nvec_probe(struct platform_device *pdev) 31032890b983086136fef8721363a2d3860f337ad53Marc Dietrich{ 311f686e9affba24cfdf94fb155aaeb36a1e14719f1Marc Dietrich int err, ret; 31232890b983086136fef8721363a2d3860f337ad53Marc Dietrich struct clk *i2c_clk; 31332890b983086136fef8721363a2d3860f337ad53Marc Dietrich struct nvec_platform_data *pdata = pdev->dev.platform_data; 31432890b983086136fef8721363a2d3860f337ad53Marc Dietrich struct nvec_chip *nvec; 31532890b983086136fef8721363a2d3860f337ad53Marc Dietrich struct nvec_msg *msg; 316f686e9affba24cfdf94fb155aaeb36a1e14719f1Marc Dietrich struct resource *res; 317f686e9affba24cfdf94fb155aaeb36a1e14719f1Marc Dietrich struct resource *iomem; 318f686e9affba24cfdf94fb155aaeb36a1e14719f1Marc Dietrich void __iomem *base; 31932890b983086136fef8721363a2d3860f337ad53Marc Dietrich 32032890b983086136fef8721363a2d3860f337ad53Marc Dietrich nvec = kzalloc(sizeof(struct nvec_chip), GFP_KERNEL); 321162c7d8c4be2d599583c42c2a8fe99bed6d87f67Marc Dietrich if (nvec == NULL) { 32232890b983086136fef8721363a2d3860f337ad53Marc Dietrich dev_err(&pdev->dev, "failed to reserve memory\n"); 32332890b983086136fef8721363a2d3860f337ad53Marc Dietrich return -ENOMEM; 32432890b983086136fef8721363a2d3860f337ad53Marc Dietrich } 32532890b983086136fef8721363a2d3860f337ad53Marc Dietrich platform_set_drvdata(pdev, nvec); 32632890b983086136fef8721363a2d3860f337ad53Marc Dietrich nvec->dev = &pdev->dev; 32732890b983086136fef8721363a2d3860f337ad53Marc Dietrich nvec->gpio = pdata->gpio; 328f686e9affba24cfdf94fb155aaeb36a1e14719f1Marc Dietrich nvec->i2c_addr = pdata->i2c_addr; 329f686e9affba24cfdf94fb155aaeb36a1e14719f1Marc Dietrich 330f686e9affba24cfdf94fb155aaeb36a1e14719f1Marc Dietrich res = platform_get_resource(pdev, IORESOURCE_MEM, 0); 331f686e9affba24cfdf94fb155aaeb36a1e14719f1Marc Dietrich if (!res) { 332f686e9affba24cfdf94fb155aaeb36a1e14719f1Marc Dietrich dev_err(&pdev->dev, "no mem resource?\n"); 333f686e9affba24cfdf94fb155aaeb36a1e14719f1Marc Dietrich return -ENODEV; 33432890b983086136fef8721363a2d3860f337ad53Marc Dietrich } 33532890b983086136fef8721363a2d3860f337ad53Marc Dietrich 336f686e9affba24cfdf94fb155aaeb36a1e14719f1Marc Dietrich iomem = request_mem_region(res->start, resource_size(res), pdev->name); 337f686e9affba24cfdf94fb155aaeb36a1e14719f1Marc Dietrich if (!iomem) { 338f686e9affba24cfdf94fb155aaeb36a1e14719f1Marc Dietrich dev_err(&pdev->dev, "I2C region already claimed\n"); 339f686e9affba24cfdf94fb155aaeb36a1e14719f1Marc Dietrich return -EBUSY; 340f686e9affba24cfdf94fb155aaeb36a1e14719f1Marc Dietrich } 34132890b983086136fef8721363a2d3860f337ad53Marc Dietrich 342f686e9affba24cfdf94fb155aaeb36a1e14719f1Marc Dietrich base = ioremap(iomem->start, resource_size(iomem)); 343f686e9affba24cfdf94fb155aaeb36a1e14719f1Marc Dietrich if (!base) { 344f686e9affba24cfdf94fb155aaeb36a1e14719f1Marc Dietrich dev_err(&pdev->dev, "Can't ioremap I2C region\n"); 345f686e9affba24cfdf94fb155aaeb36a1e14719f1Marc Dietrich return -ENOMEM; 34632890b983086136fef8721363a2d3860f337ad53Marc Dietrich } 34732890b983086136fef8721363a2d3860f337ad53Marc Dietrich 348f686e9affba24cfdf94fb155aaeb36a1e14719f1Marc Dietrich res = platform_get_resource(pdev, IORESOURCE_IRQ, 0); 349f686e9affba24cfdf94fb155aaeb36a1e14719f1Marc Dietrich if (!res) { 350f686e9affba24cfdf94fb155aaeb36a1e14719f1Marc Dietrich dev_err(&pdev->dev, "no irq resource?\n"); 351f686e9affba24cfdf94fb155aaeb36a1e14719f1Marc Dietrich ret = -ENODEV; 352f686e9affba24cfdf94fb155aaeb36a1e14719f1Marc Dietrich goto err_iounmap; 353f686e9affba24cfdf94fb155aaeb36a1e14719f1Marc Dietrich } 35432890b983086136fef8721363a2d3860f337ad53Marc Dietrich 355f686e9affba24cfdf94fb155aaeb36a1e14719f1Marc Dietrich i2c_clk = clk_get_sys("tegra-i2c.2", NULL); 356f686e9affba24cfdf94fb155aaeb36a1e14719f1Marc Dietrich if (IS_ERR(i2c_clk)) { 357f686e9affba24cfdf94fb155aaeb36a1e14719f1Marc Dietrich dev_err(nvec->dev, "failed to get controller clock\n"); 358f686e9affba24cfdf94fb155aaeb36a1e14719f1Marc Dietrich goto err_iounmap; 35932890b983086136fef8721363a2d3860f337ad53Marc Dietrich } 36032890b983086136fef8721363a2d3860f337ad53Marc Dietrich 36132890b983086136fef8721363a2d3860f337ad53Marc Dietrich clk_enable(i2c_clk); 36232890b983086136fef8721363a2d3860f337ad53Marc Dietrich clk_set_rate(i2c_clk, 8*80000); 36332890b983086136fef8721363a2d3860f337ad53Marc Dietrich 364f686e9affba24cfdf94fb155aaeb36a1e14719f1Marc Dietrich nvec->base = base; 365f686e9affba24cfdf94fb155aaeb36a1e14719f1Marc Dietrich nvec->irq = res->start; 366f686e9affba24cfdf94fb155aaeb36a1e14719f1Marc Dietrich nvec->i2c_clk = i2c_clk; 367f686e9affba24cfdf94fb155aaeb36a1e14719f1Marc Dietrich 36832890b983086136fef8721363a2d3860f337ad53Marc Dietrich /* Set the gpio to low when we've got something to say */ 36932890b983086136fef8721363a2d3860f337ad53Marc Dietrich err = gpio_request(nvec->gpio, "nvec gpio"); 370162c7d8c4be2d599583c42c2a8fe99bed6d87f67Marc Dietrich if (err < 0) 37132890b983086136fef8721363a2d3860f337ad53Marc Dietrich dev_err(nvec->dev, "couldn't request gpio\n"); 37232890b983086136fef8721363a2d3860f337ad53Marc Dietrich 37332890b983086136fef8721363a2d3860f337ad53Marc Dietrich ATOMIC_INIT_NOTIFIER_HEAD(&nvec->notifier_list); 37432890b983086136fef8721363a2d3860f337ad53Marc Dietrich 37532890b983086136fef8721363a2d3860f337ad53Marc Dietrich init_completion(&nvec->sync_write); 37632890b983086136fef8721363a2d3860f337ad53Marc Dietrich sema_init(&nvec->sync_write_mutex, 1); 37732890b983086136fef8721363a2d3860f337ad53Marc Dietrich INIT_LIST_HEAD(&nvec->tx_data); 37832890b983086136fef8721363a2d3860f337ad53Marc Dietrich INIT_LIST_HEAD(&nvec->rx_data); 37932890b983086136fef8721363a2d3860f337ad53Marc Dietrich INIT_WORK(&nvec->rx_work, nvec_dispatch); 38032890b983086136fef8721363a2d3860f337ad53Marc Dietrich INIT_WORK(&nvec->tx_work, nvec_request_master); 38132890b983086136fef8721363a2d3860f337ad53Marc Dietrich 382f686e9affba24cfdf94fb155aaeb36a1e14719f1Marc Dietrich err = request_irq(nvec->irq, nvec_interrupt, 0, "nvec", nvec); 383f686e9affba24cfdf94fb155aaeb36a1e14719f1Marc Dietrich if (err) { 384f686e9affba24cfdf94fb155aaeb36a1e14719f1Marc Dietrich dev_err(nvec->dev, "couldn't request irq\n"); 385f686e9affba24cfdf94fb155aaeb36a1e14719f1Marc Dietrich goto failed; 386f686e9affba24cfdf94fb155aaeb36a1e14719f1Marc Dietrich } 387f686e9affba24cfdf94fb155aaeb36a1e14719f1Marc Dietrich 388f686e9affba24cfdf94fb155aaeb36a1e14719f1Marc Dietrich tegra_init_i2c_slave(nvec); 389f686e9affba24cfdf94fb155aaeb36a1e14719f1Marc Dietrich 390f686e9affba24cfdf94fb155aaeb36a1e14719f1Marc Dietrich gpio_direction_output(nvec->gpio, 1); 391f686e9affba24cfdf94fb155aaeb36a1e14719f1Marc Dietrich gpio_set_value(nvec->gpio, 1); 392f686e9affba24cfdf94fb155aaeb36a1e14719f1Marc Dietrich 39332890b983086136fef8721363a2d3860f337ad53Marc Dietrich /* enable event reporting */ 39432890b983086136fef8721363a2d3860f337ad53Marc Dietrich nvec_write_async(nvec, EC_ENABLE_EVENT_REPORTING, 395162c7d8c4be2d599583c42c2a8fe99bed6d87f67Marc Dietrich sizeof(EC_ENABLE_EVENT_REPORTING)); 39632890b983086136fef8721363a2d3860f337ad53Marc Dietrich 39732890b983086136fef8721363a2d3860f337ad53Marc Dietrich nvec->nvec_status_notifier.notifier_call = nvec_status_notifier; 39832890b983086136fef8721363a2d3860f337ad53Marc Dietrich nvec_register_notifier(nvec, &nvec->nvec_status_notifier, 0); 39932890b983086136fef8721363a2d3860f337ad53Marc Dietrich 40032890b983086136fef8721363a2d3860f337ad53Marc Dietrich nvec_power_handle = nvec; 40132890b983086136fef8721363a2d3860f337ad53Marc Dietrich pm_power_off = nvec_power_off; 40232890b983086136fef8721363a2d3860f337ad53Marc Dietrich 40332890b983086136fef8721363a2d3860f337ad53Marc Dietrich /* Get Firmware Version */ 40432890b983086136fef8721363a2d3860f337ad53Marc Dietrich msg = nvec_write_sync(nvec, EC_GET_FIRMWARE_VERSION, 405162c7d8c4be2d599583c42c2a8fe99bed6d87f67Marc Dietrich sizeof(EC_GET_FIRMWARE_VERSION)); 40632890b983086136fef8721363a2d3860f337ad53Marc Dietrich 40732890b983086136fef8721363a2d3860f337ad53Marc Dietrich dev_warn(nvec->dev, "ec firmware version %02x.%02x.%02x / %02x\n", 408162c7d8c4be2d599583c42c2a8fe99bed6d87f67Marc Dietrich msg->data[4], msg->data[5], msg->data[6], msg->data[7]); 40932890b983086136fef8721363a2d3860f337ad53Marc Dietrich 41032890b983086136fef8721363a2d3860f337ad53Marc Dietrich kfree(msg->data); 41132890b983086136fef8721363a2d3860f337ad53Marc Dietrich kfree(msg); 41232890b983086136fef8721363a2d3860f337ad53Marc Dietrich 413f686e9affba24cfdf94fb155aaeb36a1e14719f1Marc Dietrich ret = mfd_add_devices(nvec->dev, -1, nvec_devices, 414162c7d8c4be2d599583c42c2a8fe99bed6d87f67Marc Dietrich ARRAY_SIZE(nvec_devices), base, 0); 415162c7d8c4be2d599583c42c2a8fe99bed6d87f67Marc Dietrich if (ret) 416f686e9affba24cfdf94fb155aaeb36a1e14719f1Marc Dietrich dev_err(nvec->dev, "error adding subdevices\n"); 417f686e9affba24cfdf94fb155aaeb36a1e14719f1Marc Dietrich 41832890b983086136fef8721363a2d3860f337ad53Marc Dietrich /* unmute speakers? */ 41932890b983086136fef8721363a2d3860f337ad53Marc Dietrich nvec_write_async(nvec, "\x0d\x10\x59\x94", 4); 42032890b983086136fef8721363a2d3860f337ad53Marc Dietrich 42132890b983086136fef8721363a2d3860f337ad53Marc Dietrich /* enable lid switch event */ 42232890b983086136fef8721363a2d3860f337ad53Marc Dietrich nvec_write_async(nvec, "\x01\x01\x01\x00\x00\x02\x00", 7); 42332890b983086136fef8721363a2d3860f337ad53Marc Dietrich 42432890b983086136fef8721363a2d3860f337ad53Marc Dietrich /* enable power button event */ 42532890b983086136fef8721363a2d3860f337ad53Marc Dietrich nvec_write_async(nvec, "\x01\x01\x01\x00\x00\x80\x00", 7); 42632890b983086136fef8721363a2d3860f337ad53Marc Dietrich 42732890b983086136fef8721363a2d3860f337ad53Marc Dietrich return 0; 42832890b983086136fef8721363a2d3860f337ad53Marc Dietrich 429f686e9affba24cfdf94fb155aaeb36a1e14719f1Marc Dietricherr_iounmap: 430f686e9affba24cfdf94fb155aaeb36a1e14719f1Marc Dietrich iounmap(base); 43132890b983086136fef8721363a2d3860f337ad53Marc Dietrichfailed: 43232890b983086136fef8721363a2d3860f337ad53Marc Dietrich kfree(nvec); 43332890b983086136fef8721363a2d3860f337ad53Marc Dietrich return -ENOMEM; 43432890b983086136fef8721363a2d3860f337ad53Marc Dietrich} 43532890b983086136fef8721363a2d3860f337ad53Marc Dietrich 43632890b983086136fef8721363a2d3860f337ad53Marc Dietrichstatic int __devexit tegra_nvec_remove(struct platform_device *pdev) 43732890b983086136fef8721363a2d3860f337ad53Marc Dietrich{ 438f686e9affba24cfdf94fb155aaeb36a1e14719f1Marc Dietrich struct nvec_chip *nvec = platform_get_drvdata(pdev); 439f686e9affba24cfdf94fb155aaeb36a1e14719f1Marc Dietrich 440f686e9affba24cfdf94fb155aaeb36a1e14719f1Marc Dietrich nvec_write_async(nvec, EC_DISABLE_EVENT_REPORTING, 3); 441f686e9affba24cfdf94fb155aaeb36a1e14719f1Marc Dietrich mfd_remove_devices(nvec->dev); 442f686e9affba24cfdf94fb155aaeb36a1e14719f1Marc Dietrich free_irq(nvec->irq, &nvec_interrupt); 443f686e9affba24cfdf94fb155aaeb36a1e14719f1Marc Dietrich iounmap(nvec->base); 444f686e9affba24cfdf94fb155aaeb36a1e14719f1Marc Dietrich gpio_free(nvec->gpio); 445f686e9affba24cfdf94fb155aaeb36a1e14719f1Marc Dietrich kfree(nvec); 446f686e9affba24cfdf94fb155aaeb36a1e14719f1Marc Dietrich 44732890b983086136fef8721363a2d3860f337ad53Marc Dietrich return 0; 44832890b983086136fef8721363a2d3860f337ad53Marc Dietrich} 44932890b983086136fef8721363a2d3860f337ad53Marc Dietrich 45032890b983086136fef8721363a2d3860f337ad53Marc Dietrich#ifdef CONFIG_PM 45132890b983086136fef8721363a2d3860f337ad53Marc Dietrich 45232890b983086136fef8721363a2d3860f337ad53Marc Dietrichstatic int tegra_nvec_suspend(struct platform_device *pdev, pm_message_t state) 45332890b983086136fef8721363a2d3860f337ad53Marc Dietrich{ 45432890b983086136fef8721363a2d3860f337ad53Marc Dietrich struct nvec_chip *nvec = platform_get_drvdata(pdev); 45532890b983086136fef8721363a2d3860f337ad53Marc Dietrich 45632890b983086136fef8721363a2d3860f337ad53Marc Dietrich dev_dbg(nvec->dev, "suspending\n"); 45732890b983086136fef8721363a2d3860f337ad53Marc Dietrich nvec_write_async(nvec, EC_DISABLE_EVENT_REPORTING, 3); 45832890b983086136fef8721363a2d3860f337ad53Marc Dietrich nvec_write_async(nvec, "\x04\x02", 2); 45932890b983086136fef8721363a2d3860f337ad53Marc Dietrich 46032890b983086136fef8721363a2d3860f337ad53Marc Dietrich return 0; 46132890b983086136fef8721363a2d3860f337ad53Marc Dietrich} 46232890b983086136fef8721363a2d3860f337ad53Marc Dietrich 463162c7d8c4be2d599583c42c2a8fe99bed6d87f67Marc Dietrichstatic int tegra_nvec_resume(struct platform_device *pdev) 464162c7d8c4be2d599583c42c2a8fe99bed6d87f67Marc Dietrich{ 46532890b983086136fef8721363a2d3860f337ad53Marc Dietrich struct nvec_chip *nvec = platform_get_drvdata(pdev); 46632890b983086136fef8721363a2d3860f337ad53Marc Dietrich 46732890b983086136fef8721363a2d3860f337ad53Marc Dietrich dev_dbg(nvec->dev, "resuming\n"); 468f686e9affba24cfdf94fb155aaeb36a1e14719f1Marc Dietrich tegra_init_i2c_slave(nvec); 46932890b983086136fef8721363a2d3860f337ad53Marc Dietrich nvec_write_async(nvec, EC_ENABLE_EVENT_REPORTING, 3); 47032890b983086136fef8721363a2d3860f337ad53Marc Dietrich 47132890b983086136fef8721363a2d3860f337ad53Marc Dietrich return 0; 47232890b983086136fef8721363a2d3860f337ad53Marc Dietrich} 47332890b983086136fef8721363a2d3860f337ad53Marc Dietrich 47432890b983086136fef8721363a2d3860f337ad53Marc Dietrich#else 47532890b983086136fef8721363a2d3860f337ad53Marc Dietrich#define tegra_nvec_suspend NULL 47632890b983086136fef8721363a2d3860f337ad53Marc Dietrich#define tegra_nvec_resume NULL 47732890b983086136fef8721363a2d3860f337ad53Marc Dietrich#endif 47832890b983086136fef8721363a2d3860f337ad53Marc Dietrich 479162c7d8c4be2d599583c42c2a8fe99bed6d87f67Marc Dietrichstatic struct platform_driver nvec_device_driver = { 480162c7d8c4be2d599583c42c2a8fe99bed6d87f67Marc Dietrich .probe = tegra_nvec_probe, 481162c7d8c4be2d599583c42c2a8fe99bed6d87f67Marc Dietrich .remove = __devexit_p(tegra_nvec_remove), 48232890b983086136fef8721363a2d3860f337ad53Marc Dietrich .suspend = tegra_nvec_suspend, 483162c7d8c4be2d599583c42c2a8fe99bed6d87f67Marc Dietrich .resume = tegra_nvec_resume, 484162c7d8c4be2d599583c42c2a8fe99bed6d87f67Marc Dietrich .driver = { 48532890b983086136fef8721363a2d3860f337ad53Marc Dietrich .name = "nvec", 48632890b983086136fef8721363a2d3860f337ad53Marc Dietrich .owner = THIS_MODULE, 48732890b983086136fef8721363a2d3860f337ad53Marc Dietrich } 48832890b983086136fef8721363a2d3860f337ad53Marc Dietrich}; 48932890b983086136fef8721363a2d3860f337ad53Marc Dietrich 49032890b983086136fef8721363a2d3860f337ad53Marc Dietrichstatic int __init tegra_nvec_init(void) 49132890b983086136fef8721363a2d3860f337ad53Marc Dietrich{ 49232890b983086136fef8721363a2d3860f337ad53Marc Dietrich return platform_driver_register(&nvec_device_driver); 49332890b983086136fef8721363a2d3860f337ad53Marc Dietrich} 49432890b983086136fef8721363a2d3860f337ad53Marc Dietrich 49532890b983086136fef8721363a2d3860f337ad53Marc Dietrichmodule_init(tegra_nvec_init); 496162c7d8c4be2d599583c42c2a8fe99bed6d87f67Marc Dietrich 49732890b983086136fef8721363a2d3860f337ad53Marc DietrichMODULE_ALIAS("platform:nvec"); 498162c7d8c4be2d599583c42c2a8fe99bed6d87f67Marc DietrichMODULE_DESCRIPTION("NVIDIA compliant embedded controller interface"); 499162c7d8c4be2d599583c42c2a8fe99bed6d87f67Marc DietrichMODULE_AUTHOR("Marc Dietrich <marvin24@gmx.de>"); 500162c7d8c4be2d599583c42c2a8fe99bed6d87f67Marc DietrichMODULE_LICENSE("GPL"); 501