nvec.c revision 6dca320c8f16b464bb762494b509b2b02897054e
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 80162c7d8c4be2d599583c42c2a8fe99bed6d87f67Marc Dietrich if (event_type != NVEC_CNTL) 8132890b983086136fef8721363a2d3860f337ad53Marc Dietrich return NOTIFY_DONE; 8232890b983086136fef8721363a2d3860f337ad53Marc Dietrich 83a3a9aa1a41429b17aa1af20995850ea1b68d5ba2Marc Dietrich printk(KERN_WARNING "unhandled msg type %ld\n", event_type); 84a3a9aa1a41429b17aa1af20995850ea1b68d5ba2Marc Dietrich print_hex_dump(KERN_WARNING, "payload: ", DUMP_PREFIX_NONE, 16, 1, 85a3a9aa1a41429b17aa1af20995850ea1b68d5ba2Marc Dietrich msg, msg[1] + 2, true); 8632890b983086136fef8721363a2d3860f337ad53Marc Dietrich 8732890b983086136fef8721363a2d3860f337ad53Marc Dietrich return NOTIFY_OK; 8832890b983086136fef8721363a2d3860f337ad53Marc Dietrich} 8932890b983086136fef8721363a2d3860f337ad53Marc Dietrich 90162c7d8c4be2d599583c42c2a8fe99bed6d87f67Marc Dietrichvoid nvec_write_async(struct nvec_chip *nvec, const unsigned char *data, 91162c7d8c4be2d599583c42c2a8fe99bed6d87f67Marc Dietrich short size) 9232890b983086136fef8721363a2d3860f337ad53Marc Dietrich{ 9332890b983086136fef8721363a2d3860f337ad53Marc Dietrich struct nvec_msg *msg = kzalloc(sizeof(struct nvec_msg), GFP_NOWAIT); 9432890b983086136fef8721363a2d3860f337ad53Marc Dietrich 9532890b983086136fef8721363a2d3860f337ad53Marc Dietrich msg->data = kzalloc(size, GFP_NOWAIT); 9632890b983086136fef8721363a2d3860f337ad53Marc Dietrich msg->data[0] = size; 9732890b983086136fef8721363a2d3860f337ad53Marc Dietrich memcpy(msg->data + 1, data, size); 9832890b983086136fef8721363a2d3860f337ad53Marc Dietrich msg->size = size + 1; 9932890b983086136fef8721363a2d3860f337ad53Marc Dietrich msg->pos = 0; 10032890b983086136fef8721363a2d3860f337ad53Marc Dietrich INIT_LIST_HEAD(&msg->node); 10132890b983086136fef8721363a2d3860f337ad53Marc Dietrich 10232890b983086136fef8721363a2d3860f337ad53Marc Dietrich list_add_tail(&msg->node, &nvec->tx_data); 10332890b983086136fef8721363a2d3860f337ad53Marc Dietrich 10432890b983086136fef8721363a2d3860f337ad53Marc Dietrich gpio_set_value(nvec->gpio, 0); 10532890b983086136fef8721363a2d3860f337ad53Marc Dietrich} 10632890b983086136fef8721363a2d3860f337ad53Marc DietrichEXPORT_SYMBOL(nvec_write_async); 10732890b983086136fef8721363a2d3860f337ad53Marc Dietrich 10832890b983086136fef8721363a2d3860f337ad53Marc Dietrichstatic void nvec_request_master(struct work_struct *work) 10932890b983086136fef8721363a2d3860f337ad53Marc Dietrich{ 11032890b983086136fef8721363a2d3860f337ad53Marc Dietrich struct nvec_chip *nvec = container_of(work, struct nvec_chip, tx_work); 11132890b983086136fef8721363a2d3860f337ad53Marc Dietrich 112162c7d8c4be2d599583c42c2a8fe99bed6d87f67Marc Dietrich if (!list_empty(&nvec->tx_data)) 11332890b983086136fef8721363a2d3860f337ad53Marc Dietrich gpio_set_value(nvec->gpio, 0); 11432890b983086136fef8721363a2d3860f337ad53Marc Dietrich} 11532890b983086136fef8721363a2d3860f337ad53Marc Dietrich 11632890b983086136fef8721363a2d3860f337ad53Marc Dietrichstatic int parse_msg(struct nvec_chip *nvec, struct nvec_msg *msg) 11732890b983086136fef8721363a2d3860f337ad53Marc Dietrich{ 118162c7d8c4be2d599583c42c2a8fe99bed6d87f67Marc Dietrich if ((msg->data[0] & 1 << 7) == 0 && msg->data[3]) { 119162c7d8c4be2d599583c42c2a8fe99bed6d87f67Marc Dietrich dev_err(nvec->dev, "ec responded %02x %02x %02x %02x\n", 120162c7d8c4be2d599583c42c2a8fe99bed6d87f67Marc Dietrich msg->data[0], msg->data[1], msg->data[2], msg->data[3]); 12132890b983086136fef8721363a2d3860f337ad53Marc Dietrich return -EINVAL; 12232890b983086136fef8721363a2d3860f337ad53Marc Dietrich } 12332890b983086136fef8721363a2d3860f337ad53Marc Dietrich 124a3a9aa1a41429b17aa1af20995850ea1b68d5ba2Marc Dietrich if ((msg->data[0] >> 7) == 1 && (msg->data[0] & 0x0f) == 5) 125a3a9aa1a41429b17aa1af20995850ea1b68d5ba2Marc Dietrich print_hex_dump(KERN_WARNING, "ec system event ", 126a3a9aa1a41429b17aa1af20995850ea1b68d5ba2Marc Dietrich DUMP_PREFIX_NONE, 16, 1, msg->data, 127a3a9aa1a41429b17aa1af20995850ea1b68d5ba2Marc Dietrich msg->data[1] + 2, true); 12832890b983086136fef8721363a2d3860f337ad53Marc Dietrich 129162c7d8c4be2d599583c42c2a8fe99bed6d87f67Marc Dietrich atomic_notifier_call_chain(&nvec->notifier_list, msg->data[0] & 0x8f, 130162c7d8c4be2d599583c42c2a8fe99bed6d87f67Marc Dietrich msg->data); 13132890b983086136fef8721363a2d3860f337ad53Marc Dietrich 13232890b983086136fef8721363a2d3860f337ad53Marc Dietrich return 0; 13332890b983086136fef8721363a2d3860f337ad53Marc Dietrich} 13432890b983086136fef8721363a2d3860f337ad53Marc Dietrich 135162c7d8c4be2d599583c42c2a8fe99bed6d87f67Marc Dietrichstatic struct nvec_msg *nvec_write_sync(struct nvec_chip *nvec, 136162c7d8c4be2d599583c42c2a8fe99bed6d87f67Marc Dietrich const unsigned char *data, short size) 13732890b983086136fef8721363a2d3860f337ad53Marc Dietrich{ 13832890b983086136fef8721363a2d3860f337ad53Marc Dietrich down(&nvec->sync_write_mutex); 13932890b983086136fef8721363a2d3860f337ad53Marc Dietrich 14032890b983086136fef8721363a2d3860f337ad53Marc Dietrich nvec->sync_write_pending = (data[1] << 8) + data[0]; 14132890b983086136fef8721363a2d3860f337ad53Marc Dietrich nvec_write_async(nvec, data, size); 14232890b983086136fef8721363a2d3860f337ad53Marc Dietrich 143162c7d8c4be2d599583c42c2a8fe99bed6d87f67Marc Dietrich dev_dbg(nvec->dev, "nvec_sync_write: 0x%04x\n", 144162c7d8c4be2d599583c42c2a8fe99bed6d87f67Marc Dietrich nvec->sync_write_pending); 14532890b983086136fef8721363a2d3860f337ad53Marc Dietrich wait_for_completion(&nvec->sync_write); 14632890b983086136fef8721363a2d3860f337ad53Marc Dietrich dev_dbg(nvec->dev, "nvec_sync_write: pong!\n"); 14732890b983086136fef8721363a2d3860f337ad53Marc Dietrich 14832890b983086136fef8721363a2d3860f337ad53Marc Dietrich up(&nvec->sync_write_mutex); 14932890b983086136fef8721363a2d3860f337ad53Marc Dietrich 15032890b983086136fef8721363a2d3860f337ad53Marc Dietrich return nvec->last_sync_msg; 15132890b983086136fef8721363a2d3860f337ad53Marc Dietrich} 15232890b983086136fef8721363a2d3860f337ad53Marc Dietrich 15332890b983086136fef8721363a2d3860f337ad53Marc Dietrich/* RX worker */ 15432890b983086136fef8721363a2d3860f337ad53Marc Dietrichstatic void nvec_dispatch(struct work_struct *work) 15532890b983086136fef8721363a2d3860f337ad53Marc Dietrich{ 15632890b983086136fef8721363a2d3860f337ad53Marc Dietrich struct nvec_chip *nvec = container_of(work, struct nvec_chip, rx_work); 15732890b983086136fef8721363a2d3860f337ad53Marc Dietrich struct nvec_msg *msg; 15832890b983086136fef8721363a2d3860f337ad53Marc Dietrich 159162c7d8c4be2d599583c42c2a8fe99bed6d87f67Marc Dietrich while (!list_empty(&nvec->rx_data)) { 16032890b983086136fef8721363a2d3860f337ad53Marc Dietrich msg = list_first_entry(&nvec->rx_data, struct nvec_msg, node); 16132890b983086136fef8721363a2d3860f337ad53Marc Dietrich list_del_init(&msg->node); 16232890b983086136fef8721363a2d3860f337ad53Marc Dietrich 163162c7d8c4be2d599583c42c2a8fe99bed6d87f67Marc Dietrich if (nvec->sync_write_pending == 164162c7d8c4be2d599583c42c2a8fe99bed6d87f67Marc Dietrich (msg->data[2] << 8) + msg->data[0]) { 16532890b983086136fef8721363a2d3860f337ad53Marc Dietrich dev_dbg(nvec->dev, "sync write completed!\n"); 16632890b983086136fef8721363a2d3860f337ad53Marc Dietrich nvec->sync_write_pending = 0; 16732890b983086136fef8721363a2d3860f337ad53Marc Dietrich nvec->last_sync_msg = msg; 16832890b983086136fef8721363a2d3860f337ad53Marc Dietrich complete(&nvec->sync_write); 16932890b983086136fef8721363a2d3860f337ad53Marc Dietrich } else { 17032890b983086136fef8721363a2d3860f337ad53Marc Dietrich parse_msg(nvec, msg); 171162c7d8c4be2d599583c42c2a8fe99bed6d87f67Marc Dietrich if ((!msg) || (!msg->data)) 172162c7d8c4be2d599583c42c2a8fe99bed6d87f67Marc Dietrich dev_warn(nvec->dev, 173162c7d8c4be2d599583c42c2a8fe99bed6d87f67Marc Dietrich "attempt access zero pointer\n"); 17432890b983086136fef8721363a2d3860f337ad53Marc Dietrich else { 17532890b983086136fef8721363a2d3860f337ad53Marc Dietrich kfree(msg->data); 17632890b983086136fef8721363a2d3860f337ad53Marc Dietrich kfree(msg); 17732890b983086136fef8721363a2d3860f337ad53Marc Dietrich } 17832890b983086136fef8721363a2d3860f337ad53Marc Dietrich } 17932890b983086136fef8721363a2d3860f337ad53Marc Dietrich } 18032890b983086136fef8721363a2d3860f337ad53Marc Dietrich} 18132890b983086136fef8721363a2d3860f337ad53Marc Dietrich 182f686e9affba24cfdf94fb155aaeb36a1e14719f1Marc Dietrichstatic irqreturn_t nvec_interrupt(int irq, void *dev) 18332890b983086136fef8721363a2d3860f337ad53Marc Dietrich{ 18432890b983086136fef8721363a2d3860f337ad53Marc Dietrich unsigned long status; 18532890b983086136fef8721363a2d3860f337ad53Marc Dietrich unsigned long received; 18632890b983086136fef8721363a2d3860f337ad53Marc Dietrich unsigned char to_send; 18732890b983086136fef8721363a2d3860f337ad53Marc Dietrich struct nvec_msg *msg; 18832890b983086136fef8721363a2d3860f337ad53Marc Dietrich struct nvec_chip *nvec = (struct nvec_chip *)dev; 189f686e9affba24cfdf94fb155aaeb36a1e14719f1Marc Dietrich void __iomem *base = nvec->base; 19032890b983086136fef8721363a2d3860f337ad53Marc Dietrich 191f686e9affba24cfdf94fb155aaeb36a1e14719f1Marc Dietrich status = readl(base + I2C_SL_STATUS); 19232890b983086136fef8721363a2d3860f337ad53Marc Dietrich 193162c7d8c4be2d599583c42c2a8fe99bed6d87f67Marc Dietrich if (!(status & I2C_SL_IRQ)) { 19432890b983086136fef8721363a2d3860f337ad53Marc Dietrich dev_warn(nvec->dev, "nvec Spurious IRQ\n"); 19532890b983086136fef8721363a2d3860f337ad53Marc Dietrich goto handled; 19632890b983086136fef8721363a2d3860f337ad53Marc Dietrich } 197162c7d8c4be2d599583c42c2a8fe99bed6d87f67Marc Dietrich if (status & END_TRANS && !(status & RCVD)) { 19832890b983086136fef8721363a2d3860f337ad53Marc Dietrich nvec->state = NVEC_WAIT; 199162c7d8c4be2d599583c42c2a8fe99bed6d87f67Marc Dietrich if (nvec->rx->size > 1) { 20032890b983086136fef8721363a2d3860f337ad53Marc Dietrich list_add_tail(&nvec->rx->node, &nvec->rx_data); 20132890b983086136fef8721363a2d3860f337ad53Marc Dietrich schedule_work(&nvec->rx_work); 20232890b983086136fef8721363a2d3860f337ad53Marc Dietrich } else { 20332890b983086136fef8721363a2d3860f337ad53Marc Dietrich kfree(nvec->rx->data); 20432890b983086136fef8721363a2d3860f337ad53Marc Dietrich kfree(nvec->rx); 20532890b983086136fef8721363a2d3860f337ad53Marc Dietrich } 20632890b983086136fef8721363a2d3860f337ad53Marc Dietrich return IRQ_HANDLED; 207162c7d8c4be2d599583c42c2a8fe99bed6d87f67Marc Dietrich } else if (status & RNW) { 208162c7d8c4be2d599583c42c2a8fe99bed6d87f67Marc Dietrich if (status & RCVD) 20932890b983086136fef8721363a2d3860f337ad53Marc Dietrich udelay(3); 21032890b983086136fef8721363a2d3860f337ad53Marc Dietrich 211162c7d8c4be2d599583c42c2a8fe99bed6d87f67Marc Dietrich if (status & RCVD) 21232890b983086136fef8721363a2d3860f337ad53Marc Dietrich nvec->state = NVEC_WRITE; 213162c7d8c4be2d599583c42c2a8fe99bed6d87f67Marc Dietrich 214162c7d8c4be2d599583c42c2a8fe99bed6d87f67Marc Dietrich if (list_empty(&nvec->tx_data)) { 21532890b983086136fef8721363a2d3860f337ad53Marc Dietrich dev_err(nvec->dev, "nvec empty tx - sending no-op\n"); 21632890b983086136fef8721363a2d3860f337ad53Marc Dietrich to_send = 0x8a; 21732890b983086136fef8721363a2d3860f337ad53Marc Dietrich nvec_write_async(nvec, "\x07\x02", 2); 21832890b983086136fef8721363a2d3860f337ad53Marc Dietrich } else { 219162c7d8c4be2d599583c42c2a8fe99bed6d87f67Marc Dietrich msg = 220162c7d8c4be2d599583c42c2a8fe99bed6d87f67Marc Dietrich list_first_entry(&nvec->tx_data, struct nvec_msg, 221162c7d8c4be2d599583c42c2a8fe99bed6d87f67Marc Dietrich node); 222162c7d8c4be2d599583c42c2a8fe99bed6d87f67Marc Dietrich if (msg->pos < msg->size) { 22332890b983086136fef8721363a2d3860f337ad53Marc Dietrich to_send = msg->data[msg->pos]; 22432890b983086136fef8721363a2d3860f337ad53Marc Dietrich msg->pos++; 22532890b983086136fef8721363a2d3860f337ad53Marc Dietrich } else { 226162c7d8c4be2d599583c42c2a8fe99bed6d87f67Marc Dietrich dev_err(nvec->dev, "nvec crap! %d\n", 227162c7d8c4be2d599583c42c2a8fe99bed6d87f67Marc Dietrich msg->size); 22832890b983086136fef8721363a2d3860f337ad53Marc Dietrich to_send = 0x01; 22932890b983086136fef8721363a2d3860f337ad53Marc Dietrich } 23032890b983086136fef8721363a2d3860f337ad53Marc Dietrich 231162c7d8c4be2d599583c42c2a8fe99bed6d87f67Marc Dietrich if (msg->pos >= msg->size) { 23232890b983086136fef8721363a2d3860f337ad53Marc Dietrich list_del_init(&msg->node); 23332890b983086136fef8721363a2d3860f337ad53Marc Dietrich kfree(msg->data); 23432890b983086136fef8721363a2d3860f337ad53Marc Dietrich kfree(msg); 23532890b983086136fef8721363a2d3860f337ad53Marc Dietrich schedule_work(&nvec->tx_work); 23632890b983086136fef8721363a2d3860f337ad53Marc Dietrich nvec->state = NVEC_WAIT; 23732890b983086136fef8721363a2d3860f337ad53Marc Dietrich } 23832890b983086136fef8721363a2d3860f337ad53Marc Dietrich } 239f686e9affba24cfdf94fb155aaeb36a1e14719f1Marc Dietrich writel(to_send, base + I2C_SL_RCVD); 24032890b983086136fef8721363a2d3860f337ad53Marc Dietrich 24132890b983086136fef8721363a2d3860f337ad53Marc Dietrich gpio_set_value(nvec->gpio, 1); 24232890b983086136fef8721363a2d3860f337ad53Marc Dietrich 24332890b983086136fef8721363a2d3860f337ad53Marc Dietrich dev_dbg(nvec->dev, "nvec sent %x\n", to_send); 24432890b983086136fef8721363a2d3860f337ad53Marc Dietrich 24532890b983086136fef8721363a2d3860f337ad53Marc Dietrich goto handled; 24632890b983086136fef8721363a2d3860f337ad53Marc Dietrich } else { 247f686e9affba24cfdf94fb155aaeb36a1e14719f1Marc Dietrich received = readl(base + I2C_SL_RCVD); 248162c7d8c4be2d599583c42c2a8fe99bed6d87f67Marc Dietrich 249162c7d8c4be2d599583c42c2a8fe99bed6d87f67Marc Dietrich if (status & RCVD) { 250f686e9affba24cfdf94fb155aaeb36a1e14719f1Marc Dietrich writel(0, base + I2C_SL_RCVD); 25132890b983086136fef8721363a2d3860f337ad53Marc Dietrich goto handled; 25232890b983086136fef8721363a2d3860f337ad53Marc Dietrich } 25332890b983086136fef8721363a2d3860f337ad53Marc Dietrich 254162c7d8c4be2d599583c42c2a8fe99bed6d87f67Marc Dietrich if (nvec->state == NVEC_WAIT) { 25532890b983086136fef8721363a2d3860f337ad53Marc Dietrich nvec->state = NVEC_READ; 25632890b983086136fef8721363a2d3860f337ad53Marc Dietrich msg = kzalloc(sizeof(struct nvec_msg), GFP_NOWAIT); 25732890b983086136fef8721363a2d3860f337ad53Marc Dietrich msg->data = kzalloc(32, GFP_NOWAIT); 25832890b983086136fef8721363a2d3860f337ad53Marc Dietrich INIT_LIST_HEAD(&msg->node); 25932890b983086136fef8721363a2d3860f337ad53Marc Dietrich nvec->rx = msg; 26032890b983086136fef8721363a2d3860f337ad53Marc Dietrich } else 26132890b983086136fef8721363a2d3860f337ad53Marc Dietrich msg = nvec->rx; 26232890b983086136fef8721363a2d3860f337ad53Marc Dietrich 26332890b983086136fef8721363a2d3860f337ad53Marc Dietrich BUG_ON(msg->pos > 32); 26432890b983086136fef8721363a2d3860f337ad53Marc Dietrich 26532890b983086136fef8721363a2d3860f337ad53Marc Dietrich msg->data[msg->pos] = received; 26632890b983086136fef8721363a2d3860f337ad53Marc Dietrich msg->pos++; 26732890b983086136fef8721363a2d3860f337ad53Marc Dietrich msg->size = msg->pos; 268162c7d8c4be2d599583c42c2a8fe99bed6d87f67Marc Dietrich dev_dbg(nvec->dev, "Got %02lx from Master (pos: %d)!\n", 269162c7d8c4be2d599583c42c2a8fe99bed6d87f67Marc Dietrich received, msg->pos); 27032890b983086136fef8721363a2d3860f337ad53Marc Dietrich } 27132890b983086136fef8721363a2d3860f337ad53Marc Dietrichhandled: 27232890b983086136fef8721363a2d3860f337ad53Marc Dietrich return IRQ_HANDLED; 27332890b983086136fef8721363a2d3860f337ad53Marc Dietrich} 27432890b983086136fef8721363a2d3860f337ad53Marc Dietrich 275f686e9affba24cfdf94fb155aaeb36a1e14719f1Marc Dietrichstatic void tegra_init_i2c_slave(struct nvec_chip *nvec) 27632890b983086136fef8721363a2d3860f337ad53Marc Dietrich{ 27732890b983086136fef8721363a2d3860f337ad53Marc Dietrich u32 val; 27832890b983086136fef8721363a2d3860f337ad53Marc Dietrich 279f686e9affba24cfdf94fb155aaeb36a1e14719f1Marc Dietrich clk_enable(nvec->i2c_clk); 280f686e9affba24cfdf94fb155aaeb36a1e14719f1Marc Dietrich 281f686e9affba24cfdf94fb155aaeb36a1e14719f1Marc Dietrich tegra_periph_reset_assert(nvec->i2c_clk); 28232890b983086136fef8721363a2d3860f337ad53Marc Dietrich udelay(2); 283f686e9affba24cfdf94fb155aaeb36a1e14719f1Marc Dietrich tegra_periph_reset_deassert(nvec->i2c_clk); 28432890b983086136fef8721363a2d3860f337ad53Marc Dietrich 28532890b983086136fef8721363a2d3860f337ad53Marc Dietrich val = I2C_CNFG_NEW_MASTER_SFM | I2C_CNFG_PACKET_MODE_EN | 286ac8107599e47b0f4638f4f3fb0141bbcf0cb142bMarc Dietrich (0x2 << I2C_CNFG_DEBOUNCE_CNT_SHIFT); 287f686e9affba24cfdf94fb155aaeb36a1e14719f1Marc Dietrich writel(val, nvec->base + I2C_CNFG); 288ac8107599e47b0f4638f4f3fb0141bbcf0cb142bMarc Dietrich 289ac8107599e47b0f4638f4f3fb0141bbcf0cb142bMarc Dietrich clk_set_rate(nvec->i2c_clk, 8 * 80000); 290ac8107599e47b0f4638f4f3fb0141bbcf0cb142bMarc Dietrich 291f686e9affba24cfdf94fb155aaeb36a1e14719f1Marc Dietrich writel(I2C_SL_NEWL, nvec->base + I2C_SL_CNFG); 292ac8107599e47b0f4638f4f3fb0141bbcf0cb142bMarc Dietrich writel(0x1E, nvec->base + I2C_SL_DELAY_COUNT); 293ac8107599e47b0f4638f4f3fb0141bbcf0cb142bMarc Dietrich 294ac8107599e47b0f4638f4f3fb0141bbcf0cb142bMarc Dietrich writel(nvec->i2c_addr>>1, nvec->base + I2C_SL_ADDR1); 295ac8107599e47b0f4638f4f3fb0141bbcf0cb142bMarc Dietrich writel(0, nvec->base + I2C_SL_ADDR2); 29632890b983086136fef8721363a2d3860f337ad53Marc Dietrich 297ac8107599e47b0f4638f4f3fb0141bbcf0cb142bMarc Dietrich enable_irq(nvec->irq); 298ac8107599e47b0f4638f4f3fb0141bbcf0cb142bMarc Dietrich 299ac8107599e47b0f4638f4f3fb0141bbcf0cb142bMarc Dietrich clk_disable(nvec->i2c_clk); 300ac8107599e47b0f4638f4f3fb0141bbcf0cb142bMarc Dietrich} 301ac8107599e47b0f4638f4f3fb0141bbcf0cb142bMarc Dietrich 302ac8107599e47b0f4638f4f3fb0141bbcf0cb142bMarc Dietrichstatic void nvec_disable_i2c_slave(struct nvec_chip *nvec) 303ac8107599e47b0f4638f4f3fb0141bbcf0cb142bMarc Dietrich{ 304ac8107599e47b0f4638f4f3fb0141bbcf0cb142bMarc Dietrich disable_irq(nvec->irq); 305ac8107599e47b0f4638f4f3fb0141bbcf0cb142bMarc Dietrich writel(I2C_SL_NEWL | I2C_SL_NACK, nvec->base + I2C_SL_CNFG); 306f686e9affba24cfdf94fb155aaeb36a1e14719f1Marc Dietrich clk_disable(nvec->i2c_clk); 30732890b983086136fef8721363a2d3860f337ad53Marc Dietrich} 30832890b983086136fef8721363a2d3860f337ad53Marc Dietrich 30932890b983086136fef8721363a2d3860f337ad53Marc Dietrichstatic void nvec_power_off(void) 31032890b983086136fef8721363a2d3860f337ad53Marc Dietrich{ 31132890b983086136fef8721363a2d3860f337ad53Marc Dietrich nvec_write_async(nvec_power_handle, EC_DISABLE_EVENT_REPORTING, 3); 31232890b983086136fef8721363a2d3860f337ad53Marc Dietrich nvec_write_async(nvec_power_handle, "\x04\x01", 2); 31332890b983086136fef8721363a2d3860f337ad53Marc Dietrich} 31432890b983086136fef8721363a2d3860f337ad53Marc Dietrich 31532890b983086136fef8721363a2d3860f337ad53Marc Dietrichstatic int __devinit tegra_nvec_probe(struct platform_device *pdev) 31632890b983086136fef8721363a2d3860f337ad53Marc Dietrich{ 317f686e9affba24cfdf94fb155aaeb36a1e14719f1Marc Dietrich int err, ret; 31832890b983086136fef8721363a2d3860f337ad53Marc Dietrich struct clk *i2c_clk; 31932890b983086136fef8721363a2d3860f337ad53Marc Dietrich struct nvec_platform_data *pdata = pdev->dev.platform_data; 32032890b983086136fef8721363a2d3860f337ad53Marc Dietrich struct nvec_chip *nvec; 32132890b983086136fef8721363a2d3860f337ad53Marc Dietrich struct nvec_msg *msg; 322f686e9affba24cfdf94fb155aaeb36a1e14719f1Marc Dietrich struct resource *res; 323f686e9affba24cfdf94fb155aaeb36a1e14719f1Marc Dietrich struct resource *iomem; 324f686e9affba24cfdf94fb155aaeb36a1e14719f1Marc Dietrich void __iomem *base; 32532890b983086136fef8721363a2d3860f337ad53Marc Dietrich 32632890b983086136fef8721363a2d3860f337ad53Marc Dietrich nvec = kzalloc(sizeof(struct nvec_chip), GFP_KERNEL); 327162c7d8c4be2d599583c42c2a8fe99bed6d87f67Marc Dietrich if (nvec == NULL) { 32832890b983086136fef8721363a2d3860f337ad53Marc Dietrich dev_err(&pdev->dev, "failed to reserve memory\n"); 32932890b983086136fef8721363a2d3860f337ad53Marc Dietrich return -ENOMEM; 33032890b983086136fef8721363a2d3860f337ad53Marc Dietrich } 33132890b983086136fef8721363a2d3860f337ad53Marc Dietrich platform_set_drvdata(pdev, nvec); 33232890b983086136fef8721363a2d3860f337ad53Marc Dietrich nvec->dev = &pdev->dev; 33332890b983086136fef8721363a2d3860f337ad53Marc Dietrich nvec->gpio = pdata->gpio; 334f686e9affba24cfdf94fb155aaeb36a1e14719f1Marc Dietrich nvec->i2c_addr = pdata->i2c_addr; 335f686e9affba24cfdf94fb155aaeb36a1e14719f1Marc Dietrich 336f686e9affba24cfdf94fb155aaeb36a1e14719f1Marc Dietrich res = platform_get_resource(pdev, IORESOURCE_MEM, 0); 337f686e9affba24cfdf94fb155aaeb36a1e14719f1Marc Dietrich if (!res) { 338f686e9affba24cfdf94fb155aaeb36a1e14719f1Marc Dietrich dev_err(&pdev->dev, "no mem resource?\n"); 339f686e9affba24cfdf94fb155aaeb36a1e14719f1Marc Dietrich return -ENODEV; 34032890b983086136fef8721363a2d3860f337ad53Marc Dietrich } 34132890b983086136fef8721363a2d3860f337ad53Marc Dietrich 342f686e9affba24cfdf94fb155aaeb36a1e14719f1Marc Dietrich iomem = request_mem_region(res->start, resource_size(res), pdev->name); 343f686e9affba24cfdf94fb155aaeb36a1e14719f1Marc Dietrich if (!iomem) { 344f686e9affba24cfdf94fb155aaeb36a1e14719f1Marc Dietrich dev_err(&pdev->dev, "I2C region already claimed\n"); 345f686e9affba24cfdf94fb155aaeb36a1e14719f1Marc Dietrich return -EBUSY; 346f686e9affba24cfdf94fb155aaeb36a1e14719f1Marc Dietrich } 34732890b983086136fef8721363a2d3860f337ad53Marc Dietrich 348f686e9affba24cfdf94fb155aaeb36a1e14719f1Marc Dietrich base = ioremap(iomem->start, resource_size(iomem)); 349f686e9affba24cfdf94fb155aaeb36a1e14719f1Marc Dietrich if (!base) { 350f686e9affba24cfdf94fb155aaeb36a1e14719f1Marc Dietrich dev_err(&pdev->dev, "Can't ioremap I2C region\n"); 351f686e9affba24cfdf94fb155aaeb36a1e14719f1Marc Dietrich return -ENOMEM; 35232890b983086136fef8721363a2d3860f337ad53Marc Dietrich } 35332890b983086136fef8721363a2d3860f337ad53Marc Dietrich 354f686e9affba24cfdf94fb155aaeb36a1e14719f1Marc Dietrich res = platform_get_resource(pdev, IORESOURCE_IRQ, 0); 355f686e9affba24cfdf94fb155aaeb36a1e14719f1Marc Dietrich if (!res) { 356f686e9affba24cfdf94fb155aaeb36a1e14719f1Marc Dietrich dev_err(&pdev->dev, "no irq resource?\n"); 357f686e9affba24cfdf94fb155aaeb36a1e14719f1Marc Dietrich ret = -ENODEV; 358f686e9affba24cfdf94fb155aaeb36a1e14719f1Marc Dietrich goto err_iounmap; 359f686e9affba24cfdf94fb155aaeb36a1e14719f1Marc Dietrich } 36032890b983086136fef8721363a2d3860f337ad53Marc Dietrich 361f686e9affba24cfdf94fb155aaeb36a1e14719f1Marc Dietrich i2c_clk = clk_get_sys("tegra-i2c.2", NULL); 362f686e9affba24cfdf94fb155aaeb36a1e14719f1Marc Dietrich if (IS_ERR(i2c_clk)) { 363f686e9affba24cfdf94fb155aaeb36a1e14719f1Marc Dietrich dev_err(nvec->dev, "failed to get controller clock\n"); 364f686e9affba24cfdf94fb155aaeb36a1e14719f1Marc Dietrich goto err_iounmap; 36532890b983086136fef8721363a2d3860f337ad53Marc Dietrich } 36632890b983086136fef8721363a2d3860f337ad53Marc Dietrich 367f686e9affba24cfdf94fb155aaeb36a1e14719f1Marc Dietrich nvec->base = base; 368f686e9affba24cfdf94fb155aaeb36a1e14719f1Marc Dietrich nvec->irq = res->start; 369f686e9affba24cfdf94fb155aaeb36a1e14719f1Marc Dietrich nvec->i2c_clk = i2c_clk; 370f686e9affba24cfdf94fb155aaeb36a1e14719f1Marc Dietrich 37132890b983086136fef8721363a2d3860f337ad53Marc Dietrich /* Set the gpio to low when we've got something to say */ 37232890b983086136fef8721363a2d3860f337ad53Marc Dietrich err = gpio_request(nvec->gpio, "nvec gpio"); 373162c7d8c4be2d599583c42c2a8fe99bed6d87f67Marc Dietrich if (err < 0) 37432890b983086136fef8721363a2d3860f337ad53Marc Dietrich dev_err(nvec->dev, "couldn't request gpio\n"); 37532890b983086136fef8721363a2d3860f337ad53Marc Dietrich 37632890b983086136fef8721363a2d3860f337ad53Marc Dietrich ATOMIC_INIT_NOTIFIER_HEAD(&nvec->notifier_list); 37732890b983086136fef8721363a2d3860f337ad53Marc Dietrich 37832890b983086136fef8721363a2d3860f337ad53Marc Dietrich init_completion(&nvec->sync_write); 37932890b983086136fef8721363a2d3860f337ad53Marc Dietrich sema_init(&nvec->sync_write_mutex, 1); 38032890b983086136fef8721363a2d3860f337ad53Marc Dietrich INIT_LIST_HEAD(&nvec->tx_data); 38132890b983086136fef8721363a2d3860f337ad53Marc Dietrich INIT_LIST_HEAD(&nvec->rx_data); 38232890b983086136fef8721363a2d3860f337ad53Marc Dietrich INIT_WORK(&nvec->rx_work, nvec_dispatch); 38332890b983086136fef8721363a2d3860f337ad53Marc Dietrich INIT_WORK(&nvec->tx_work, nvec_request_master); 38432890b983086136fef8721363a2d3860f337ad53Marc Dietrich 385f686e9affba24cfdf94fb155aaeb36a1e14719f1Marc Dietrich err = request_irq(nvec->irq, nvec_interrupt, 0, "nvec", nvec); 386f686e9affba24cfdf94fb155aaeb36a1e14719f1Marc Dietrich if (err) { 387f686e9affba24cfdf94fb155aaeb36a1e14719f1Marc Dietrich dev_err(nvec->dev, "couldn't request irq\n"); 388f686e9affba24cfdf94fb155aaeb36a1e14719f1Marc Dietrich goto failed; 389f686e9affba24cfdf94fb155aaeb36a1e14719f1Marc Dietrich } 390ac8107599e47b0f4638f4f3fb0141bbcf0cb142bMarc Dietrich disable_irq(nvec->irq); 391f686e9affba24cfdf94fb155aaeb36a1e14719f1Marc Dietrich 392f686e9affba24cfdf94fb155aaeb36a1e14719f1Marc Dietrich tegra_init_i2c_slave(nvec); 393f686e9affba24cfdf94fb155aaeb36a1e14719f1Marc Dietrich 394ac8107599e47b0f4638f4f3fb0141bbcf0cb142bMarc Dietrich clk_enable(i2c_clk); 395ac8107599e47b0f4638f4f3fb0141bbcf0cb142bMarc Dietrich 396f686e9affba24cfdf94fb155aaeb36a1e14719f1Marc Dietrich gpio_direction_output(nvec->gpio, 1); 397f686e9affba24cfdf94fb155aaeb36a1e14719f1Marc Dietrich gpio_set_value(nvec->gpio, 1); 398f686e9affba24cfdf94fb155aaeb36a1e14719f1Marc Dietrich 39932890b983086136fef8721363a2d3860f337ad53Marc Dietrich /* enable event reporting */ 40032890b983086136fef8721363a2d3860f337ad53Marc Dietrich nvec_write_async(nvec, EC_ENABLE_EVENT_REPORTING, 401162c7d8c4be2d599583c42c2a8fe99bed6d87f67Marc Dietrich sizeof(EC_ENABLE_EVENT_REPORTING)); 40232890b983086136fef8721363a2d3860f337ad53Marc Dietrich 40332890b983086136fef8721363a2d3860f337ad53Marc Dietrich nvec->nvec_status_notifier.notifier_call = nvec_status_notifier; 40432890b983086136fef8721363a2d3860f337ad53Marc Dietrich nvec_register_notifier(nvec, &nvec->nvec_status_notifier, 0); 40532890b983086136fef8721363a2d3860f337ad53Marc Dietrich 40632890b983086136fef8721363a2d3860f337ad53Marc Dietrich nvec_power_handle = nvec; 40732890b983086136fef8721363a2d3860f337ad53Marc Dietrich pm_power_off = nvec_power_off; 40832890b983086136fef8721363a2d3860f337ad53Marc Dietrich 40932890b983086136fef8721363a2d3860f337ad53Marc Dietrich /* Get Firmware Version */ 41032890b983086136fef8721363a2d3860f337ad53Marc Dietrich msg = nvec_write_sync(nvec, EC_GET_FIRMWARE_VERSION, 411162c7d8c4be2d599583c42c2a8fe99bed6d87f67Marc Dietrich sizeof(EC_GET_FIRMWARE_VERSION)); 41232890b983086136fef8721363a2d3860f337ad53Marc Dietrich 41332890b983086136fef8721363a2d3860f337ad53Marc Dietrich dev_warn(nvec->dev, "ec firmware version %02x.%02x.%02x / %02x\n", 414162c7d8c4be2d599583c42c2a8fe99bed6d87f67Marc Dietrich msg->data[4], msg->data[5], msg->data[6], msg->data[7]); 41532890b983086136fef8721363a2d3860f337ad53Marc Dietrich 41632890b983086136fef8721363a2d3860f337ad53Marc Dietrich kfree(msg->data); 41732890b983086136fef8721363a2d3860f337ad53Marc Dietrich kfree(msg); 41832890b983086136fef8721363a2d3860f337ad53Marc Dietrich 419f686e9affba24cfdf94fb155aaeb36a1e14719f1Marc Dietrich ret = mfd_add_devices(nvec->dev, -1, nvec_devices, 420162c7d8c4be2d599583c42c2a8fe99bed6d87f67Marc Dietrich ARRAY_SIZE(nvec_devices), base, 0); 421162c7d8c4be2d599583c42c2a8fe99bed6d87f67Marc Dietrich if (ret) 422f686e9affba24cfdf94fb155aaeb36a1e14719f1Marc Dietrich dev_err(nvec->dev, "error adding subdevices\n"); 423f686e9affba24cfdf94fb155aaeb36a1e14719f1Marc Dietrich 42432890b983086136fef8721363a2d3860f337ad53Marc Dietrich /* unmute speakers? */ 4256dca320c8f16b464bb762494b509b2b02897054eMarc Dietrich nvec_write_async(nvec, "\x0d\x10\x59\x95", 4); 42632890b983086136fef8721363a2d3860f337ad53Marc Dietrich 42732890b983086136fef8721363a2d3860f337ad53Marc Dietrich /* enable lid switch event */ 42832890b983086136fef8721363a2d3860f337ad53Marc Dietrich nvec_write_async(nvec, "\x01\x01\x01\x00\x00\x02\x00", 7); 42932890b983086136fef8721363a2d3860f337ad53Marc Dietrich 43032890b983086136fef8721363a2d3860f337ad53Marc Dietrich /* enable power button event */ 43132890b983086136fef8721363a2d3860f337ad53Marc Dietrich nvec_write_async(nvec, "\x01\x01\x01\x00\x00\x80\x00", 7); 43232890b983086136fef8721363a2d3860f337ad53Marc Dietrich 43332890b983086136fef8721363a2d3860f337ad53Marc Dietrich return 0; 43432890b983086136fef8721363a2d3860f337ad53Marc Dietrich 435f686e9affba24cfdf94fb155aaeb36a1e14719f1Marc Dietricherr_iounmap: 436f686e9affba24cfdf94fb155aaeb36a1e14719f1Marc Dietrich iounmap(base); 43732890b983086136fef8721363a2d3860f337ad53Marc Dietrichfailed: 43832890b983086136fef8721363a2d3860f337ad53Marc Dietrich kfree(nvec); 43932890b983086136fef8721363a2d3860f337ad53Marc Dietrich return -ENOMEM; 44032890b983086136fef8721363a2d3860f337ad53Marc Dietrich} 44132890b983086136fef8721363a2d3860f337ad53Marc Dietrich 44232890b983086136fef8721363a2d3860f337ad53Marc Dietrichstatic int __devexit tegra_nvec_remove(struct platform_device *pdev) 44332890b983086136fef8721363a2d3860f337ad53Marc Dietrich{ 444f686e9affba24cfdf94fb155aaeb36a1e14719f1Marc Dietrich struct nvec_chip *nvec = platform_get_drvdata(pdev); 445f686e9affba24cfdf94fb155aaeb36a1e14719f1Marc Dietrich 446f686e9affba24cfdf94fb155aaeb36a1e14719f1Marc Dietrich nvec_write_async(nvec, EC_DISABLE_EVENT_REPORTING, 3); 447f686e9affba24cfdf94fb155aaeb36a1e14719f1Marc Dietrich mfd_remove_devices(nvec->dev); 448f686e9affba24cfdf94fb155aaeb36a1e14719f1Marc Dietrich free_irq(nvec->irq, &nvec_interrupt); 449f686e9affba24cfdf94fb155aaeb36a1e14719f1Marc Dietrich iounmap(nvec->base); 450f686e9affba24cfdf94fb155aaeb36a1e14719f1Marc Dietrich gpio_free(nvec->gpio); 451f686e9affba24cfdf94fb155aaeb36a1e14719f1Marc Dietrich kfree(nvec); 452f686e9affba24cfdf94fb155aaeb36a1e14719f1Marc Dietrich 45332890b983086136fef8721363a2d3860f337ad53Marc Dietrich return 0; 45432890b983086136fef8721363a2d3860f337ad53Marc Dietrich} 45532890b983086136fef8721363a2d3860f337ad53Marc Dietrich 45632890b983086136fef8721363a2d3860f337ad53Marc Dietrich#ifdef CONFIG_PM 45732890b983086136fef8721363a2d3860f337ad53Marc Dietrich 45832890b983086136fef8721363a2d3860f337ad53Marc Dietrichstatic int tegra_nvec_suspend(struct platform_device *pdev, pm_message_t state) 45932890b983086136fef8721363a2d3860f337ad53Marc Dietrich{ 46032890b983086136fef8721363a2d3860f337ad53Marc Dietrich struct nvec_chip *nvec = platform_get_drvdata(pdev); 46132890b983086136fef8721363a2d3860f337ad53Marc Dietrich 46232890b983086136fef8721363a2d3860f337ad53Marc Dietrich dev_dbg(nvec->dev, "suspending\n"); 46332890b983086136fef8721363a2d3860f337ad53Marc Dietrich nvec_write_async(nvec, EC_DISABLE_EVENT_REPORTING, 3); 46432890b983086136fef8721363a2d3860f337ad53Marc Dietrich nvec_write_async(nvec, "\x04\x02", 2); 465ac8107599e47b0f4638f4f3fb0141bbcf0cb142bMarc Dietrich nvec_disable_i2c_slave(nvec); 46632890b983086136fef8721363a2d3860f337ad53Marc Dietrich 46732890b983086136fef8721363a2d3860f337ad53Marc Dietrich return 0; 46832890b983086136fef8721363a2d3860f337ad53Marc Dietrich} 46932890b983086136fef8721363a2d3860f337ad53Marc Dietrich 470162c7d8c4be2d599583c42c2a8fe99bed6d87f67Marc Dietrichstatic int tegra_nvec_resume(struct platform_device *pdev) 471162c7d8c4be2d599583c42c2a8fe99bed6d87f67Marc Dietrich{ 47232890b983086136fef8721363a2d3860f337ad53Marc Dietrich struct nvec_chip *nvec = platform_get_drvdata(pdev); 47332890b983086136fef8721363a2d3860f337ad53Marc Dietrich 47432890b983086136fef8721363a2d3860f337ad53Marc Dietrich dev_dbg(nvec->dev, "resuming\n"); 475f686e9affba24cfdf94fb155aaeb36a1e14719f1Marc Dietrich tegra_init_i2c_slave(nvec); 47632890b983086136fef8721363a2d3860f337ad53Marc Dietrich nvec_write_async(nvec, EC_ENABLE_EVENT_REPORTING, 3); 47732890b983086136fef8721363a2d3860f337ad53Marc Dietrich 47832890b983086136fef8721363a2d3860f337ad53Marc Dietrich return 0; 47932890b983086136fef8721363a2d3860f337ad53Marc Dietrich} 48032890b983086136fef8721363a2d3860f337ad53Marc Dietrich 48132890b983086136fef8721363a2d3860f337ad53Marc Dietrich#else 48232890b983086136fef8721363a2d3860f337ad53Marc Dietrich#define tegra_nvec_suspend NULL 48332890b983086136fef8721363a2d3860f337ad53Marc Dietrich#define tegra_nvec_resume NULL 48432890b983086136fef8721363a2d3860f337ad53Marc Dietrich#endif 48532890b983086136fef8721363a2d3860f337ad53Marc Dietrich 486162c7d8c4be2d599583c42c2a8fe99bed6d87f67Marc Dietrichstatic struct platform_driver nvec_device_driver = { 487162c7d8c4be2d599583c42c2a8fe99bed6d87f67Marc Dietrich .probe = tegra_nvec_probe, 488162c7d8c4be2d599583c42c2a8fe99bed6d87f67Marc Dietrich .remove = __devexit_p(tegra_nvec_remove), 48932890b983086136fef8721363a2d3860f337ad53Marc Dietrich .suspend = tegra_nvec_suspend, 490162c7d8c4be2d599583c42c2a8fe99bed6d87f67Marc Dietrich .resume = tegra_nvec_resume, 491162c7d8c4be2d599583c42c2a8fe99bed6d87f67Marc Dietrich .driver = { 49232890b983086136fef8721363a2d3860f337ad53Marc Dietrich .name = "nvec", 49332890b983086136fef8721363a2d3860f337ad53Marc Dietrich .owner = THIS_MODULE, 49432890b983086136fef8721363a2d3860f337ad53Marc Dietrich } 49532890b983086136fef8721363a2d3860f337ad53Marc Dietrich}; 49632890b983086136fef8721363a2d3860f337ad53Marc Dietrich 49732890b983086136fef8721363a2d3860f337ad53Marc Dietrichstatic int __init tegra_nvec_init(void) 49832890b983086136fef8721363a2d3860f337ad53Marc Dietrich{ 49932890b983086136fef8721363a2d3860f337ad53Marc Dietrich return platform_driver_register(&nvec_device_driver); 50032890b983086136fef8721363a2d3860f337ad53Marc Dietrich} 50132890b983086136fef8721363a2d3860f337ad53Marc Dietrich 50232890b983086136fef8721363a2d3860f337ad53Marc Dietrichmodule_init(tegra_nvec_init); 503162c7d8c4be2d599583c42c2a8fe99bed6d87f67Marc Dietrich 50432890b983086136fef8721363a2d3860f337ad53Marc DietrichMODULE_ALIAS("platform:nvec"); 505162c7d8c4be2d599583c42c2a8fe99bed6d87f67Marc DietrichMODULE_DESCRIPTION("NVIDIA compliant embedded controller interface"); 506162c7d8c4be2d599583c42c2a8fe99bed6d87f67Marc DietrichMODULE_AUTHOR("Marc Dietrich <marvin24@gmx.de>"); 507162c7d8c4be2d599583c42c2a8fe99bed6d87f67Marc DietrichMODULE_LICENSE("GPL"); 508