nvec.c revision 0b1076c4b2a06e517fafbb2b4704f23e69b05386
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 200b1076c4b2a06e517fafbb2b4704f23e69b05386Julian Andres Klode#include <linux/atomic.h> 2132890b983086136fef8721363a2d3860f337ad53Marc Dietrich#include <linux/completion.h> 2232890b983086136fef8721363a2d3860f337ad53Marc Dietrich#include <linux/interrupt.h> 23162c7d8c4be2d599583c42c2a8fe99bed6d87f67Marc Dietrich#include <linux/io.h> 2432890b983086136fef8721363a2d3860f337ad53Marc Dietrich#include <linux/irq.h> 2532890b983086136fef8721363a2d3860f337ad53Marc Dietrich#include <linux/slab.h> 2632890b983086136fef8721363a2d3860f337ad53Marc Dietrich#include <linux/gpio.h> 2732890b983086136fef8721363a2d3860f337ad53Marc Dietrich#include <linux/serio.h> 2832890b983086136fef8721363a2d3860f337ad53Marc Dietrich#include <linux/delay.h> 2932890b983086136fef8721363a2d3860f337ad53Marc Dietrich#include <linux/input.h> 3032890b983086136fef8721363a2d3860f337ad53Marc Dietrich#include <linux/workqueue.h> 3132890b983086136fef8721363a2d3860f337ad53Marc Dietrich#include <linux/clk.h> 32162c7d8c4be2d599583c42c2a8fe99bed6d87f67Marc Dietrich 3332890b983086136fef8721363a2d3860f337ad53Marc Dietrich#include <linux/semaphore.h> 3432890b983086136fef8721363a2d3860f337ad53Marc Dietrich#include <linux/list.h> 3532890b983086136fef8721363a2d3860f337ad53Marc Dietrich#include <linux/notifier.h> 3632890b983086136fef8721363a2d3860f337ad53Marc Dietrich#include <linux/platform_device.h> 37f686e9affba24cfdf94fb155aaeb36a1e14719f1Marc Dietrich#include <linux/mfd/core.h> 38162c7d8c4be2d599583c42c2a8fe99bed6d87f67Marc Dietrich 39162c7d8c4be2d599583c42c2a8fe99bed6d87f67Marc Dietrich#include <mach/iomap.h> 40162c7d8c4be2d599583c42c2a8fe99bed6d87f67Marc Dietrich#include <mach/clk.h> 41162c7d8c4be2d599583c42c2a8fe99bed6d87f67Marc Dietrich 4232890b983086136fef8721363a2d3860f337ad53Marc Dietrich#include "nvec.h" 4332890b983086136fef8721363a2d3860f337ad53Marc Dietrich 44162c7d8c4be2d599583c42c2a8fe99bed6d87f67Marc Dietrichstatic const unsigned char EC_DISABLE_EVENT_REPORTING[3] = "\x04\x00\x00"; 45162c7d8c4be2d599583c42c2a8fe99bed6d87f67Marc Dietrichstatic const unsigned char EC_ENABLE_EVENT_REPORTING[3] = "\x04\x00\x01"; 46162c7d8c4be2d599583c42c2a8fe99bed6d87f67Marc Dietrichstatic const unsigned char EC_GET_FIRMWARE_VERSION[2] = "\x07\x15"; 4732890b983086136fef8721363a2d3860f337ad53Marc Dietrich 4832890b983086136fef8721363a2d3860f337ad53Marc Dietrichstatic struct nvec_chip *nvec_power_handle; 4932890b983086136fef8721363a2d3860f337ad53Marc Dietrich 50f686e9affba24cfdf94fb155aaeb36a1e14719f1Marc Dietrichstatic struct mfd_cell nvec_devices[] = { 51f686e9affba24cfdf94fb155aaeb36a1e14719f1Marc Dietrich { 52162c7d8c4be2d599583c42c2a8fe99bed6d87f67Marc Dietrich .name = "nvec-kbd", 53162c7d8c4be2d599583c42c2a8fe99bed6d87f67Marc Dietrich .id = 1, 54f686e9affba24cfdf94fb155aaeb36a1e14719f1Marc Dietrich }, 55f686e9affba24cfdf94fb155aaeb36a1e14719f1Marc Dietrich { 56162c7d8c4be2d599583c42c2a8fe99bed6d87f67Marc Dietrich .name = "nvec-mouse", 57162c7d8c4be2d599583c42c2a8fe99bed6d87f67Marc Dietrich .id = 1, 58f686e9affba24cfdf94fb155aaeb36a1e14719f1Marc Dietrich }, 59f686e9affba24cfdf94fb155aaeb36a1e14719f1Marc Dietrich { 60162c7d8c4be2d599583c42c2a8fe99bed6d87f67Marc Dietrich .name = "nvec-power", 61162c7d8c4be2d599583c42c2a8fe99bed6d87f67Marc Dietrich .id = 1, 62f686e9affba24cfdf94fb155aaeb36a1e14719f1Marc Dietrich }, 63f686e9affba24cfdf94fb155aaeb36a1e14719f1Marc Dietrich { 64162c7d8c4be2d599583c42c2a8fe99bed6d87f67Marc Dietrich .name = "nvec-power", 65162c7d8c4be2d599583c42c2a8fe99bed6d87f67Marc Dietrich .id = 2, 66f686e9affba24cfdf94fb155aaeb36a1e14719f1Marc Dietrich }, 6797cc26576fa2b0eb1aad1b29515bb0a32f86c45cIlya Petrov { 6897cc26576fa2b0eb1aad1b29515bb0a32f86c45cIlya Petrov .name = "nvec-leds", 6997cc26576fa2b0eb1aad1b29515bb0a32f86c45cIlya Petrov .id = 1, 7097cc26576fa2b0eb1aad1b29515bb0a32f86c45cIlya Petrov }, 71f686e9affba24cfdf94fb155aaeb36a1e14719f1Marc Dietrich}; 72f686e9affba24cfdf94fb155aaeb36a1e14719f1Marc Dietrich 7332890b983086136fef8721363a2d3860f337ad53Marc Dietrichint nvec_register_notifier(struct nvec_chip *nvec, struct notifier_block *nb, 74162c7d8c4be2d599583c42c2a8fe99bed6d87f67Marc Dietrich unsigned int events) 7532890b983086136fef8721363a2d3860f337ad53Marc Dietrich{ 7632890b983086136fef8721363a2d3860f337ad53Marc Dietrich return atomic_notifier_chain_register(&nvec->notifier_list, nb); 7732890b983086136fef8721363a2d3860f337ad53Marc Dietrich} 7832890b983086136fef8721363a2d3860f337ad53Marc DietrichEXPORT_SYMBOL_GPL(nvec_register_notifier); 7932890b983086136fef8721363a2d3860f337ad53Marc Dietrich 80162c7d8c4be2d599583c42c2a8fe99bed6d87f67Marc Dietrichstatic int nvec_status_notifier(struct notifier_block *nb, 81162c7d8c4be2d599583c42c2a8fe99bed6d87f67Marc Dietrich unsigned long event_type, void *data) 8232890b983086136fef8721363a2d3860f337ad53Marc Dietrich{ 8332890b983086136fef8721363a2d3860f337ad53Marc Dietrich unsigned char *msg = (unsigned char *)data; 8432890b983086136fef8721363a2d3860f337ad53Marc Dietrich 85162c7d8c4be2d599583c42c2a8fe99bed6d87f67Marc Dietrich if (event_type != NVEC_CNTL) 8632890b983086136fef8721363a2d3860f337ad53Marc Dietrich return NOTIFY_DONE; 8732890b983086136fef8721363a2d3860f337ad53Marc Dietrich 88a3a9aa1a41429b17aa1af20995850ea1b68d5ba2Marc Dietrich printk(KERN_WARNING "unhandled msg type %ld\n", event_type); 89a3a9aa1a41429b17aa1af20995850ea1b68d5ba2Marc Dietrich print_hex_dump(KERN_WARNING, "payload: ", DUMP_PREFIX_NONE, 16, 1, 90a3a9aa1a41429b17aa1af20995850ea1b68d5ba2Marc Dietrich msg, msg[1] + 2, true); 9132890b983086136fef8721363a2d3860f337ad53Marc Dietrich 9232890b983086136fef8721363a2d3860f337ad53Marc Dietrich return NOTIFY_OK; 9332890b983086136fef8721363a2d3860f337ad53Marc Dietrich} 9432890b983086136fef8721363a2d3860f337ad53Marc Dietrich 950b1076c4b2a06e517fafbb2b4704f23e69b05386Julian Andres Klodestatic struct nvec_msg *nvec_msg_alloc(struct nvec_chip *nvec) 960b1076c4b2a06e517fafbb2b4704f23e69b05386Julian Andres Klode{ 970b1076c4b2a06e517fafbb2b4704f23e69b05386Julian Andres Klode int i; 980b1076c4b2a06e517fafbb2b4704f23e69b05386Julian Andres Klode 990b1076c4b2a06e517fafbb2b4704f23e69b05386Julian Andres Klode for (i = 0; i < NVEC_POOL_SIZE; i++) { 1000b1076c4b2a06e517fafbb2b4704f23e69b05386Julian Andres Klode if (atomic_xchg(&nvec->msg_pool[i].used, 1) == 0) { 1010b1076c4b2a06e517fafbb2b4704f23e69b05386Julian Andres Klode dev_vdbg(nvec->dev, "INFO: Allocate %i\n", i); 1020b1076c4b2a06e517fafbb2b4704f23e69b05386Julian Andres Klode return &nvec->msg_pool[i]; 1030b1076c4b2a06e517fafbb2b4704f23e69b05386Julian Andres Klode } 1040b1076c4b2a06e517fafbb2b4704f23e69b05386Julian Andres Klode } 1050b1076c4b2a06e517fafbb2b4704f23e69b05386Julian Andres Klode 1060b1076c4b2a06e517fafbb2b4704f23e69b05386Julian Andres Klode dev_err(nvec->dev, "could not allocate buffer\n"); 1070b1076c4b2a06e517fafbb2b4704f23e69b05386Julian Andres Klode 1080b1076c4b2a06e517fafbb2b4704f23e69b05386Julian Andres Klode return NULL; 1090b1076c4b2a06e517fafbb2b4704f23e69b05386Julian Andres Klode} 1100b1076c4b2a06e517fafbb2b4704f23e69b05386Julian Andres Klode 1110b1076c4b2a06e517fafbb2b4704f23e69b05386Julian Andres Klodestatic void nvec_msg_free(struct nvec_chip *nvec, struct nvec_msg *msg) 1120b1076c4b2a06e517fafbb2b4704f23e69b05386Julian Andres Klode{ 1130b1076c4b2a06e517fafbb2b4704f23e69b05386Julian Andres Klode dev_vdbg(nvec->dev, "INFO: Free %ti\n", msg - nvec->msg_pool); 1140b1076c4b2a06e517fafbb2b4704f23e69b05386Julian Andres Klode atomic_set(&msg->used, 0); 1150b1076c4b2a06e517fafbb2b4704f23e69b05386Julian Andres Klode} 1160b1076c4b2a06e517fafbb2b4704f23e69b05386Julian Andres Klode 117162c7d8c4be2d599583c42c2a8fe99bed6d87f67Marc Dietrichvoid nvec_write_async(struct nvec_chip *nvec, const unsigned char *data, 118162c7d8c4be2d599583c42c2a8fe99bed6d87f67Marc Dietrich short size) 11932890b983086136fef8721363a2d3860f337ad53Marc Dietrich{ 12032890b983086136fef8721363a2d3860f337ad53Marc Dietrich struct nvec_msg *msg = kzalloc(sizeof(struct nvec_msg), GFP_NOWAIT); 12132890b983086136fef8721363a2d3860f337ad53Marc Dietrich 12232890b983086136fef8721363a2d3860f337ad53Marc Dietrich msg->data = kzalloc(size, GFP_NOWAIT); 12332890b983086136fef8721363a2d3860f337ad53Marc Dietrich msg->data[0] = size; 12432890b983086136fef8721363a2d3860f337ad53Marc Dietrich memcpy(msg->data + 1, data, size); 12532890b983086136fef8721363a2d3860f337ad53Marc Dietrich msg->size = size + 1; 12632890b983086136fef8721363a2d3860f337ad53Marc Dietrich msg->pos = 0; 12732890b983086136fef8721363a2d3860f337ad53Marc Dietrich INIT_LIST_HEAD(&msg->node); 12832890b983086136fef8721363a2d3860f337ad53Marc Dietrich 12932890b983086136fef8721363a2d3860f337ad53Marc Dietrich list_add_tail(&msg->node, &nvec->tx_data); 13032890b983086136fef8721363a2d3860f337ad53Marc Dietrich 13132890b983086136fef8721363a2d3860f337ad53Marc Dietrich gpio_set_value(nvec->gpio, 0); 13232890b983086136fef8721363a2d3860f337ad53Marc Dietrich} 13332890b983086136fef8721363a2d3860f337ad53Marc DietrichEXPORT_SYMBOL(nvec_write_async); 13432890b983086136fef8721363a2d3860f337ad53Marc Dietrich 13532890b983086136fef8721363a2d3860f337ad53Marc Dietrichstatic void nvec_request_master(struct work_struct *work) 13632890b983086136fef8721363a2d3860f337ad53Marc Dietrich{ 13732890b983086136fef8721363a2d3860f337ad53Marc Dietrich struct nvec_chip *nvec = container_of(work, struct nvec_chip, tx_work); 13832890b983086136fef8721363a2d3860f337ad53Marc Dietrich 139162c7d8c4be2d599583c42c2a8fe99bed6d87f67Marc Dietrich if (!list_empty(&nvec->tx_data)) 14032890b983086136fef8721363a2d3860f337ad53Marc Dietrich gpio_set_value(nvec->gpio, 0); 14132890b983086136fef8721363a2d3860f337ad53Marc Dietrich} 14232890b983086136fef8721363a2d3860f337ad53Marc Dietrich 14332890b983086136fef8721363a2d3860f337ad53Marc Dietrichstatic int parse_msg(struct nvec_chip *nvec, struct nvec_msg *msg) 14432890b983086136fef8721363a2d3860f337ad53Marc Dietrich{ 145162c7d8c4be2d599583c42c2a8fe99bed6d87f67Marc Dietrich if ((msg->data[0] & 1 << 7) == 0 && msg->data[3]) { 146162c7d8c4be2d599583c42c2a8fe99bed6d87f67Marc Dietrich dev_err(nvec->dev, "ec responded %02x %02x %02x %02x\n", 147162c7d8c4be2d599583c42c2a8fe99bed6d87f67Marc Dietrich msg->data[0], msg->data[1], msg->data[2], msg->data[3]); 14832890b983086136fef8721363a2d3860f337ad53Marc Dietrich return -EINVAL; 14932890b983086136fef8721363a2d3860f337ad53Marc Dietrich } 15032890b983086136fef8721363a2d3860f337ad53Marc Dietrich 151a3a9aa1a41429b17aa1af20995850ea1b68d5ba2Marc Dietrich if ((msg->data[0] >> 7) == 1 && (msg->data[0] & 0x0f) == 5) 152a3a9aa1a41429b17aa1af20995850ea1b68d5ba2Marc Dietrich print_hex_dump(KERN_WARNING, "ec system event ", 153a3a9aa1a41429b17aa1af20995850ea1b68d5ba2Marc Dietrich DUMP_PREFIX_NONE, 16, 1, msg->data, 154a3a9aa1a41429b17aa1af20995850ea1b68d5ba2Marc Dietrich msg->data[1] + 2, true); 15532890b983086136fef8721363a2d3860f337ad53Marc Dietrich 156162c7d8c4be2d599583c42c2a8fe99bed6d87f67Marc Dietrich atomic_notifier_call_chain(&nvec->notifier_list, msg->data[0] & 0x8f, 157162c7d8c4be2d599583c42c2a8fe99bed6d87f67Marc Dietrich msg->data); 15832890b983086136fef8721363a2d3860f337ad53Marc Dietrich 15932890b983086136fef8721363a2d3860f337ad53Marc Dietrich return 0; 16032890b983086136fef8721363a2d3860f337ad53Marc Dietrich} 16132890b983086136fef8721363a2d3860f337ad53Marc Dietrich 162162c7d8c4be2d599583c42c2a8fe99bed6d87f67Marc Dietrichstatic struct nvec_msg *nvec_write_sync(struct nvec_chip *nvec, 163162c7d8c4be2d599583c42c2a8fe99bed6d87f67Marc Dietrich const unsigned char *data, short size) 16432890b983086136fef8721363a2d3860f337ad53Marc Dietrich{ 16532890b983086136fef8721363a2d3860f337ad53Marc Dietrich down(&nvec->sync_write_mutex); 16632890b983086136fef8721363a2d3860f337ad53Marc Dietrich 16732890b983086136fef8721363a2d3860f337ad53Marc Dietrich nvec->sync_write_pending = (data[1] << 8) + data[0]; 16832890b983086136fef8721363a2d3860f337ad53Marc Dietrich nvec_write_async(nvec, data, size); 16932890b983086136fef8721363a2d3860f337ad53Marc Dietrich 170162c7d8c4be2d599583c42c2a8fe99bed6d87f67Marc Dietrich dev_dbg(nvec->dev, "nvec_sync_write: 0x%04x\n", 171162c7d8c4be2d599583c42c2a8fe99bed6d87f67Marc Dietrich nvec->sync_write_pending); 17232890b983086136fef8721363a2d3860f337ad53Marc Dietrich wait_for_completion(&nvec->sync_write); 17332890b983086136fef8721363a2d3860f337ad53Marc Dietrich dev_dbg(nvec->dev, "nvec_sync_write: pong!\n"); 17432890b983086136fef8721363a2d3860f337ad53Marc Dietrich 17532890b983086136fef8721363a2d3860f337ad53Marc Dietrich up(&nvec->sync_write_mutex); 17632890b983086136fef8721363a2d3860f337ad53Marc Dietrich 17732890b983086136fef8721363a2d3860f337ad53Marc Dietrich return nvec->last_sync_msg; 17832890b983086136fef8721363a2d3860f337ad53Marc Dietrich} 17932890b983086136fef8721363a2d3860f337ad53Marc Dietrich 18032890b983086136fef8721363a2d3860f337ad53Marc Dietrich/* RX worker */ 18132890b983086136fef8721363a2d3860f337ad53Marc Dietrichstatic void nvec_dispatch(struct work_struct *work) 18232890b983086136fef8721363a2d3860f337ad53Marc Dietrich{ 18332890b983086136fef8721363a2d3860f337ad53Marc Dietrich struct nvec_chip *nvec = container_of(work, struct nvec_chip, rx_work); 18432890b983086136fef8721363a2d3860f337ad53Marc Dietrich struct nvec_msg *msg; 18532890b983086136fef8721363a2d3860f337ad53Marc Dietrich 186162c7d8c4be2d599583c42c2a8fe99bed6d87f67Marc Dietrich while (!list_empty(&nvec->rx_data)) { 18732890b983086136fef8721363a2d3860f337ad53Marc Dietrich msg = list_first_entry(&nvec->rx_data, struct nvec_msg, node); 18832890b983086136fef8721363a2d3860f337ad53Marc Dietrich list_del_init(&msg->node); 18932890b983086136fef8721363a2d3860f337ad53Marc Dietrich 190162c7d8c4be2d599583c42c2a8fe99bed6d87f67Marc Dietrich if (nvec->sync_write_pending == 191162c7d8c4be2d599583c42c2a8fe99bed6d87f67Marc Dietrich (msg->data[2] << 8) + msg->data[0]) { 19232890b983086136fef8721363a2d3860f337ad53Marc Dietrich dev_dbg(nvec->dev, "sync write completed!\n"); 19332890b983086136fef8721363a2d3860f337ad53Marc Dietrich nvec->sync_write_pending = 0; 19432890b983086136fef8721363a2d3860f337ad53Marc Dietrich nvec->last_sync_msg = msg; 19532890b983086136fef8721363a2d3860f337ad53Marc Dietrich complete(&nvec->sync_write); 19632890b983086136fef8721363a2d3860f337ad53Marc Dietrich } else { 19732890b983086136fef8721363a2d3860f337ad53Marc Dietrich parse_msg(nvec, msg); 198162c7d8c4be2d599583c42c2a8fe99bed6d87f67Marc Dietrich if ((!msg) || (!msg->data)) 199162c7d8c4be2d599583c42c2a8fe99bed6d87f67Marc Dietrich dev_warn(nvec->dev, 200162c7d8c4be2d599583c42c2a8fe99bed6d87f67Marc Dietrich "attempt access zero pointer\n"); 20132890b983086136fef8721363a2d3860f337ad53Marc Dietrich else { 20232890b983086136fef8721363a2d3860f337ad53Marc Dietrich kfree(msg->data); 20332890b983086136fef8721363a2d3860f337ad53Marc Dietrich kfree(msg); 20432890b983086136fef8721363a2d3860f337ad53Marc Dietrich } 20532890b983086136fef8721363a2d3860f337ad53Marc Dietrich } 20632890b983086136fef8721363a2d3860f337ad53Marc Dietrich } 20732890b983086136fef8721363a2d3860f337ad53Marc Dietrich} 20832890b983086136fef8721363a2d3860f337ad53Marc Dietrich 209f686e9affba24cfdf94fb155aaeb36a1e14719f1Marc Dietrichstatic irqreturn_t nvec_interrupt(int irq, void *dev) 21032890b983086136fef8721363a2d3860f337ad53Marc Dietrich{ 21132890b983086136fef8721363a2d3860f337ad53Marc Dietrich unsigned long status; 21232890b983086136fef8721363a2d3860f337ad53Marc Dietrich unsigned long received; 21332890b983086136fef8721363a2d3860f337ad53Marc Dietrich unsigned char to_send; 21432890b983086136fef8721363a2d3860f337ad53Marc Dietrich struct nvec_msg *msg; 21532890b983086136fef8721363a2d3860f337ad53Marc Dietrich struct nvec_chip *nvec = (struct nvec_chip *)dev; 216f686e9affba24cfdf94fb155aaeb36a1e14719f1Marc Dietrich void __iomem *base = nvec->base; 21732890b983086136fef8721363a2d3860f337ad53Marc Dietrich 218f686e9affba24cfdf94fb155aaeb36a1e14719f1Marc Dietrich status = readl(base + I2C_SL_STATUS); 21932890b983086136fef8721363a2d3860f337ad53Marc Dietrich 220162c7d8c4be2d599583c42c2a8fe99bed6d87f67Marc Dietrich if (!(status & I2C_SL_IRQ)) { 22132890b983086136fef8721363a2d3860f337ad53Marc Dietrich dev_warn(nvec->dev, "nvec Spurious IRQ\n"); 22232890b983086136fef8721363a2d3860f337ad53Marc Dietrich goto handled; 22332890b983086136fef8721363a2d3860f337ad53Marc Dietrich } 224162c7d8c4be2d599583c42c2a8fe99bed6d87f67Marc Dietrich if (status & END_TRANS && !(status & RCVD)) { 22532890b983086136fef8721363a2d3860f337ad53Marc Dietrich nvec->state = NVEC_WAIT; 226162c7d8c4be2d599583c42c2a8fe99bed6d87f67Marc Dietrich if (nvec->rx->size > 1) { 22732890b983086136fef8721363a2d3860f337ad53Marc Dietrich list_add_tail(&nvec->rx->node, &nvec->rx_data); 22832890b983086136fef8721363a2d3860f337ad53Marc Dietrich schedule_work(&nvec->rx_work); 22932890b983086136fef8721363a2d3860f337ad53Marc Dietrich } else { 23032890b983086136fef8721363a2d3860f337ad53Marc Dietrich kfree(nvec->rx->data); 23132890b983086136fef8721363a2d3860f337ad53Marc Dietrich kfree(nvec->rx); 23232890b983086136fef8721363a2d3860f337ad53Marc Dietrich } 23332890b983086136fef8721363a2d3860f337ad53Marc Dietrich return IRQ_HANDLED; 234162c7d8c4be2d599583c42c2a8fe99bed6d87f67Marc Dietrich } else if (status & RNW) { 235162c7d8c4be2d599583c42c2a8fe99bed6d87f67Marc Dietrich if (status & RCVD) 23632890b983086136fef8721363a2d3860f337ad53Marc Dietrich udelay(3); 23732890b983086136fef8721363a2d3860f337ad53Marc Dietrich 238162c7d8c4be2d599583c42c2a8fe99bed6d87f67Marc Dietrich if (status & RCVD) 23932890b983086136fef8721363a2d3860f337ad53Marc Dietrich nvec->state = NVEC_WRITE; 240162c7d8c4be2d599583c42c2a8fe99bed6d87f67Marc Dietrich 241162c7d8c4be2d599583c42c2a8fe99bed6d87f67Marc Dietrich if (list_empty(&nvec->tx_data)) { 24232890b983086136fef8721363a2d3860f337ad53Marc Dietrich dev_err(nvec->dev, "nvec empty tx - sending no-op\n"); 24332890b983086136fef8721363a2d3860f337ad53Marc Dietrich to_send = 0x8a; 24432890b983086136fef8721363a2d3860f337ad53Marc Dietrich nvec_write_async(nvec, "\x07\x02", 2); 24532890b983086136fef8721363a2d3860f337ad53Marc Dietrich } else { 246162c7d8c4be2d599583c42c2a8fe99bed6d87f67Marc Dietrich msg = 247162c7d8c4be2d599583c42c2a8fe99bed6d87f67Marc Dietrich list_first_entry(&nvec->tx_data, struct nvec_msg, 248162c7d8c4be2d599583c42c2a8fe99bed6d87f67Marc Dietrich node); 249162c7d8c4be2d599583c42c2a8fe99bed6d87f67Marc Dietrich if (msg->pos < msg->size) { 25032890b983086136fef8721363a2d3860f337ad53Marc Dietrich to_send = msg->data[msg->pos]; 25132890b983086136fef8721363a2d3860f337ad53Marc Dietrich msg->pos++; 25232890b983086136fef8721363a2d3860f337ad53Marc Dietrich } else { 253162c7d8c4be2d599583c42c2a8fe99bed6d87f67Marc Dietrich dev_err(nvec->dev, "nvec crap! %d\n", 254162c7d8c4be2d599583c42c2a8fe99bed6d87f67Marc Dietrich msg->size); 25532890b983086136fef8721363a2d3860f337ad53Marc Dietrich to_send = 0x01; 25632890b983086136fef8721363a2d3860f337ad53Marc Dietrich } 25732890b983086136fef8721363a2d3860f337ad53Marc Dietrich 258162c7d8c4be2d599583c42c2a8fe99bed6d87f67Marc Dietrich if (msg->pos >= msg->size) { 25932890b983086136fef8721363a2d3860f337ad53Marc Dietrich list_del_init(&msg->node); 26032890b983086136fef8721363a2d3860f337ad53Marc Dietrich kfree(msg->data); 26132890b983086136fef8721363a2d3860f337ad53Marc Dietrich kfree(msg); 26232890b983086136fef8721363a2d3860f337ad53Marc Dietrich schedule_work(&nvec->tx_work); 26332890b983086136fef8721363a2d3860f337ad53Marc Dietrich nvec->state = NVEC_WAIT; 26432890b983086136fef8721363a2d3860f337ad53Marc Dietrich } 26532890b983086136fef8721363a2d3860f337ad53Marc Dietrich } 266f686e9affba24cfdf94fb155aaeb36a1e14719f1Marc Dietrich writel(to_send, base + I2C_SL_RCVD); 26732890b983086136fef8721363a2d3860f337ad53Marc Dietrich 26832890b983086136fef8721363a2d3860f337ad53Marc Dietrich gpio_set_value(nvec->gpio, 1); 26932890b983086136fef8721363a2d3860f337ad53Marc Dietrich 27032890b983086136fef8721363a2d3860f337ad53Marc Dietrich dev_dbg(nvec->dev, "nvec sent %x\n", to_send); 27132890b983086136fef8721363a2d3860f337ad53Marc Dietrich 27232890b983086136fef8721363a2d3860f337ad53Marc Dietrich goto handled; 27332890b983086136fef8721363a2d3860f337ad53Marc Dietrich } else { 274f686e9affba24cfdf94fb155aaeb36a1e14719f1Marc Dietrich received = readl(base + I2C_SL_RCVD); 275162c7d8c4be2d599583c42c2a8fe99bed6d87f67Marc Dietrich 276162c7d8c4be2d599583c42c2a8fe99bed6d87f67Marc Dietrich if (status & RCVD) { 277f686e9affba24cfdf94fb155aaeb36a1e14719f1Marc Dietrich writel(0, base + I2C_SL_RCVD); 27832890b983086136fef8721363a2d3860f337ad53Marc Dietrich goto handled; 27932890b983086136fef8721363a2d3860f337ad53Marc Dietrich } 28032890b983086136fef8721363a2d3860f337ad53Marc Dietrich 281162c7d8c4be2d599583c42c2a8fe99bed6d87f67Marc Dietrich if (nvec->state == NVEC_WAIT) { 28232890b983086136fef8721363a2d3860f337ad53Marc Dietrich nvec->state = NVEC_READ; 28332890b983086136fef8721363a2d3860f337ad53Marc Dietrich msg = kzalloc(sizeof(struct nvec_msg), GFP_NOWAIT); 28432890b983086136fef8721363a2d3860f337ad53Marc Dietrich msg->data = kzalloc(32, GFP_NOWAIT); 28532890b983086136fef8721363a2d3860f337ad53Marc Dietrich INIT_LIST_HEAD(&msg->node); 28632890b983086136fef8721363a2d3860f337ad53Marc Dietrich nvec->rx = msg; 28732890b983086136fef8721363a2d3860f337ad53Marc Dietrich } else 28832890b983086136fef8721363a2d3860f337ad53Marc Dietrich msg = nvec->rx; 28932890b983086136fef8721363a2d3860f337ad53Marc Dietrich 29032890b983086136fef8721363a2d3860f337ad53Marc Dietrich BUG_ON(msg->pos > 32); 29132890b983086136fef8721363a2d3860f337ad53Marc Dietrich 29232890b983086136fef8721363a2d3860f337ad53Marc Dietrich msg->data[msg->pos] = received; 29332890b983086136fef8721363a2d3860f337ad53Marc Dietrich msg->pos++; 29432890b983086136fef8721363a2d3860f337ad53Marc Dietrich msg->size = msg->pos; 295162c7d8c4be2d599583c42c2a8fe99bed6d87f67Marc Dietrich dev_dbg(nvec->dev, "Got %02lx from Master (pos: %d)!\n", 296162c7d8c4be2d599583c42c2a8fe99bed6d87f67Marc Dietrich received, msg->pos); 29732890b983086136fef8721363a2d3860f337ad53Marc Dietrich } 29832890b983086136fef8721363a2d3860f337ad53Marc Dietrichhandled: 29932890b983086136fef8721363a2d3860f337ad53Marc Dietrich return IRQ_HANDLED; 30032890b983086136fef8721363a2d3860f337ad53Marc Dietrich} 30132890b983086136fef8721363a2d3860f337ad53Marc Dietrich 302f686e9affba24cfdf94fb155aaeb36a1e14719f1Marc Dietrichstatic void tegra_init_i2c_slave(struct nvec_chip *nvec) 30332890b983086136fef8721363a2d3860f337ad53Marc Dietrich{ 30432890b983086136fef8721363a2d3860f337ad53Marc Dietrich u32 val; 30532890b983086136fef8721363a2d3860f337ad53Marc Dietrich 306f686e9affba24cfdf94fb155aaeb36a1e14719f1Marc Dietrich clk_enable(nvec->i2c_clk); 307f686e9affba24cfdf94fb155aaeb36a1e14719f1Marc Dietrich 308f686e9affba24cfdf94fb155aaeb36a1e14719f1Marc Dietrich tegra_periph_reset_assert(nvec->i2c_clk); 30932890b983086136fef8721363a2d3860f337ad53Marc Dietrich udelay(2); 310f686e9affba24cfdf94fb155aaeb36a1e14719f1Marc Dietrich tegra_periph_reset_deassert(nvec->i2c_clk); 31132890b983086136fef8721363a2d3860f337ad53Marc Dietrich 31232890b983086136fef8721363a2d3860f337ad53Marc Dietrich val = I2C_CNFG_NEW_MASTER_SFM | I2C_CNFG_PACKET_MODE_EN | 313ac8107599e47b0f4638f4f3fb0141bbcf0cb142bMarc Dietrich (0x2 << I2C_CNFG_DEBOUNCE_CNT_SHIFT); 314f686e9affba24cfdf94fb155aaeb36a1e14719f1Marc Dietrich writel(val, nvec->base + I2C_CNFG); 315ac8107599e47b0f4638f4f3fb0141bbcf0cb142bMarc Dietrich 316ac8107599e47b0f4638f4f3fb0141bbcf0cb142bMarc Dietrich clk_set_rate(nvec->i2c_clk, 8 * 80000); 317ac8107599e47b0f4638f4f3fb0141bbcf0cb142bMarc Dietrich 318f686e9affba24cfdf94fb155aaeb36a1e14719f1Marc Dietrich writel(I2C_SL_NEWL, nvec->base + I2C_SL_CNFG); 319ac8107599e47b0f4638f4f3fb0141bbcf0cb142bMarc Dietrich writel(0x1E, nvec->base + I2C_SL_DELAY_COUNT); 320ac8107599e47b0f4638f4f3fb0141bbcf0cb142bMarc Dietrich 321ac8107599e47b0f4638f4f3fb0141bbcf0cb142bMarc Dietrich writel(nvec->i2c_addr>>1, nvec->base + I2C_SL_ADDR1); 322ac8107599e47b0f4638f4f3fb0141bbcf0cb142bMarc Dietrich writel(0, nvec->base + I2C_SL_ADDR2); 32332890b983086136fef8721363a2d3860f337ad53Marc Dietrich 324ac8107599e47b0f4638f4f3fb0141bbcf0cb142bMarc Dietrich enable_irq(nvec->irq); 325ac8107599e47b0f4638f4f3fb0141bbcf0cb142bMarc Dietrich 326ac8107599e47b0f4638f4f3fb0141bbcf0cb142bMarc Dietrich clk_disable(nvec->i2c_clk); 327ac8107599e47b0f4638f4f3fb0141bbcf0cb142bMarc Dietrich} 328ac8107599e47b0f4638f4f3fb0141bbcf0cb142bMarc Dietrich 329ac8107599e47b0f4638f4f3fb0141bbcf0cb142bMarc Dietrichstatic void nvec_disable_i2c_slave(struct nvec_chip *nvec) 330ac8107599e47b0f4638f4f3fb0141bbcf0cb142bMarc Dietrich{ 331ac8107599e47b0f4638f4f3fb0141bbcf0cb142bMarc Dietrich disable_irq(nvec->irq); 332ac8107599e47b0f4638f4f3fb0141bbcf0cb142bMarc Dietrich writel(I2C_SL_NEWL | I2C_SL_NACK, nvec->base + I2C_SL_CNFG); 333f686e9affba24cfdf94fb155aaeb36a1e14719f1Marc Dietrich clk_disable(nvec->i2c_clk); 33432890b983086136fef8721363a2d3860f337ad53Marc Dietrich} 33532890b983086136fef8721363a2d3860f337ad53Marc Dietrich 33632890b983086136fef8721363a2d3860f337ad53Marc Dietrichstatic void nvec_power_off(void) 33732890b983086136fef8721363a2d3860f337ad53Marc Dietrich{ 33832890b983086136fef8721363a2d3860f337ad53Marc Dietrich nvec_write_async(nvec_power_handle, EC_DISABLE_EVENT_REPORTING, 3); 33932890b983086136fef8721363a2d3860f337ad53Marc Dietrich nvec_write_async(nvec_power_handle, "\x04\x01", 2); 34032890b983086136fef8721363a2d3860f337ad53Marc Dietrich} 34132890b983086136fef8721363a2d3860f337ad53Marc Dietrich 34232890b983086136fef8721363a2d3860f337ad53Marc Dietrichstatic int __devinit tegra_nvec_probe(struct platform_device *pdev) 34332890b983086136fef8721363a2d3860f337ad53Marc Dietrich{ 344f686e9affba24cfdf94fb155aaeb36a1e14719f1Marc Dietrich int err, ret; 34532890b983086136fef8721363a2d3860f337ad53Marc Dietrich struct clk *i2c_clk; 34632890b983086136fef8721363a2d3860f337ad53Marc Dietrich struct nvec_platform_data *pdata = pdev->dev.platform_data; 34732890b983086136fef8721363a2d3860f337ad53Marc Dietrich struct nvec_chip *nvec; 34832890b983086136fef8721363a2d3860f337ad53Marc Dietrich struct nvec_msg *msg; 349f686e9affba24cfdf94fb155aaeb36a1e14719f1Marc Dietrich struct resource *res; 350f686e9affba24cfdf94fb155aaeb36a1e14719f1Marc Dietrich struct resource *iomem; 351f686e9affba24cfdf94fb155aaeb36a1e14719f1Marc Dietrich void __iomem *base; 35232890b983086136fef8721363a2d3860f337ad53Marc Dietrich 35332890b983086136fef8721363a2d3860f337ad53Marc Dietrich nvec = kzalloc(sizeof(struct nvec_chip), GFP_KERNEL); 354162c7d8c4be2d599583c42c2a8fe99bed6d87f67Marc Dietrich if (nvec == NULL) { 35532890b983086136fef8721363a2d3860f337ad53Marc Dietrich dev_err(&pdev->dev, "failed to reserve memory\n"); 35632890b983086136fef8721363a2d3860f337ad53Marc Dietrich return -ENOMEM; 35732890b983086136fef8721363a2d3860f337ad53Marc Dietrich } 35832890b983086136fef8721363a2d3860f337ad53Marc Dietrich platform_set_drvdata(pdev, nvec); 35932890b983086136fef8721363a2d3860f337ad53Marc Dietrich nvec->dev = &pdev->dev; 36032890b983086136fef8721363a2d3860f337ad53Marc Dietrich nvec->gpio = pdata->gpio; 361f686e9affba24cfdf94fb155aaeb36a1e14719f1Marc Dietrich nvec->i2c_addr = pdata->i2c_addr; 362f686e9affba24cfdf94fb155aaeb36a1e14719f1Marc Dietrich 363f686e9affba24cfdf94fb155aaeb36a1e14719f1Marc Dietrich res = platform_get_resource(pdev, IORESOURCE_MEM, 0); 364f686e9affba24cfdf94fb155aaeb36a1e14719f1Marc Dietrich if (!res) { 365f686e9affba24cfdf94fb155aaeb36a1e14719f1Marc Dietrich dev_err(&pdev->dev, "no mem resource?\n"); 366f686e9affba24cfdf94fb155aaeb36a1e14719f1Marc Dietrich return -ENODEV; 36732890b983086136fef8721363a2d3860f337ad53Marc Dietrich } 36832890b983086136fef8721363a2d3860f337ad53Marc Dietrich 369f686e9affba24cfdf94fb155aaeb36a1e14719f1Marc Dietrich iomem = request_mem_region(res->start, resource_size(res), pdev->name); 370f686e9affba24cfdf94fb155aaeb36a1e14719f1Marc Dietrich if (!iomem) { 371f686e9affba24cfdf94fb155aaeb36a1e14719f1Marc Dietrich dev_err(&pdev->dev, "I2C region already claimed\n"); 372f686e9affba24cfdf94fb155aaeb36a1e14719f1Marc Dietrich return -EBUSY; 373f686e9affba24cfdf94fb155aaeb36a1e14719f1Marc Dietrich } 37432890b983086136fef8721363a2d3860f337ad53Marc Dietrich 375f686e9affba24cfdf94fb155aaeb36a1e14719f1Marc Dietrich base = ioremap(iomem->start, resource_size(iomem)); 376f686e9affba24cfdf94fb155aaeb36a1e14719f1Marc Dietrich if (!base) { 377f686e9affba24cfdf94fb155aaeb36a1e14719f1Marc Dietrich dev_err(&pdev->dev, "Can't ioremap I2C region\n"); 378f686e9affba24cfdf94fb155aaeb36a1e14719f1Marc Dietrich return -ENOMEM; 37932890b983086136fef8721363a2d3860f337ad53Marc Dietrich } 38032890b983086136fef8721363a2d3860f337ad53Marc Dietrich 381f686e9affba24cfdf94fb155aaeb36a1e14719f1Marc Dietrich res = platform_get_resource(pdev, IORESOURCE_IRQ, 0); 382f686e9affba24cfdf94fb155aaeb36a1e14719f1Marc Dietrich if (!res) { 383f686e9affba24cfdf94fb155aaeb36a1e14719f1Marc Dietrich dev_err(&pdev->dev, "no irq resource?\n"); 384f686e9affba24cfdf94fb155aaeb36a1e14719f1Marc Dietrich ret = -ENODEV; 385f686e9affba24cfdf94fb155aaeb36a1e14719f1Marc Dietrich goto err_iounmap; 386f686e9affba24cfdf94fb155aaeb36a1e14719f1Marc Dietrich } 38732890b983086136fef8721363a2d3860f337ad53Marc Dietrich 388f686e9affba24cfdf94fb155aaeb36a1e14719f1Marc Dietrich i2c_clk = clk_get_sys("tegra-i2c.2", NULL); 389f686e9affba24cfdf94fb155aaeb36a1e14719f1Marc Dietrich if (IS_ERR(i2c_clk)) { 390f686e9affba24cfdf94fb155aaeb36a1e14719f1Marc Dietrich dev_err(nvec->dev, "failed to get controller clock\n"); 391f686e9affba24cfdf94fb155aaeb36a1e14719f1Marc Dietrich goto err_iounmap; 39232890b983086136fef8721363a2d3860f337ad53Marc Dietrich } 39332890b983086136fef8721363a2d3860f337ad53Marc Dietrich 394f686e9affba24cfdf94fb155aaeb36a1e14719f1Marc Dietrich nvec->base = base; 395f686e9affba24cfdf94fb155aaeb36a1e14719f1Marc Dietrich nvec->irq = res->start; 396f686e9affba24cfdf94fb155aaeb36a1e14719f1Marc Dietrich nvec->i2c_clk = i2c_clk; 397f686e9affba24cfdf94fb155aaeb36a1e14719f1Marc Dietrich 39832890b983086136fef8721363a2d3860f337ad53Marc Dietrich /* Set the gpio to low when we've got something to say */ 39932890b983086136fef8721363a2d3860f337ad53Marc Dietrich err = gpio_request(nvec->gpio, "nvec gpio"); 400162c7d8c4be2d599583c42c2a8fe99bed6d87f67Marc Dietrich if (err < 0) 40132890b983086136fef8721363a2d3860f337ad53Marc Dietrich dev_err(nvec->dev, "couldn't request gpio\n"); 40232890b983086136fef8721363a2d3860f337ad53Marc Dietrich 40332890b983086136fef8721363a2d3860f337ad53Marc Dietrich ATOMIC_INIT_NOTIFIER_HEAD(&nvec->notifier_list); 40432890b983086136fef8721363a2d3860f337ad53Marc Dietrich 40532890b983086136fef8721363a2d3860f337ad53Marc Dietrich init_completion(&nvec->sync_write); 40632890b983086136fef8721363a2d3860f337ad53Marc Dietrich sema_init(&nvec->sync_write_mutex, 1); 40732890b983086136fef8721363a2d3860f337ad53Marc Dietrich INIT_LIST_HEAD(&nvec->tx_data); 40832890b983086136fef8721363a2d3860f337ad53Marc Dietrich INIT_LIST_HEAD(&nvec->rx_data); 40932890b983086136fef8721363a2d3860f337ad53Marc Dietrich INIT_WORK(&nvec->rx_work, nvec_dispatch); 41032890b983086136fef8721363a2d3860f337ad53Marc Dietrich INIT_WORK(&nvec->tx_work, nvec_request_master); 41132890b983086136fef8721363a2d3860f337ad53Marc Dietrich 412f686e9affba24cfdf94fb155aaeb36a1e14719f1Marc Dietrich err = request_irq(nvec->irq, nvec_interrupt, 0, "nvec", nvec); 413f686e9affba24cfdf94fb155aaeb36a1e14719f1Marc Dietrich if (err) { 414f686e9affba24cfdf94fb155aaeb36a1e14719f1Marc Dietrich dev_err(nvec->dev, "couldn't request irq\n"); 415f686e9affba24cfdf94fb155aaeb36a1e14719f1Marc Dietrich goto failed; 416f686e9affba24cfdf94fb155aaeb36a1e14719f1Marc Dietrich } 417ac8107599e47b0f4638f4f3fb0141bbcf0cb142bMarc Dietrich disable_irq(nvec->irq); 418f686e9affba24cfdf94fb155aaeb36a1e14719f1Marc Dietrich 419f686e9affba24cfdf94fb155aaeb36a1e14719f1Marc Dietrich tegra_init_i2c_slave(nvec); 420f686e9affba24cfdf94fb155aaeb36a1e14719f1Marc Dietrich 421ac8107599e47b0f4638f4f3fb0141bbcf0cb142bMarc Dietrich clk_enable(i2c_clk); 422ac8107599e47b0f4638f4f3fb0141bbcf0cb142bMarc Dietrich 423f686e9affba24cfdf94fb155aaeb36a1e14719f1Marc Dietrich gpio_direction_output(nvec->gpio, 1); 424f686e9affba24cfdf94fb155aaeb36a1e14719f1Marc Dietrich gpio_set_value(nvec->gpio, 1); 425f686e9affba24cfdf94fb155aaeb36a1e14719f1Marc Dietrich 42632890b983086136fef8721363a2d3860f337ad53Marc Dietrich /* enable event reporting */ 42732890b983086136fef8721363a2d3860f337ad53Marc Dietrich nvec_write_async(nvec, EC_ENABLE_EVENT_REPORTING, 428162c7d8c4be2d599583c42c2a8fe99bed6d87f67Marc Dietrich sizeof(EC_ENABLE_EVENT_REPORTING)); 42932890b983086136fef8721363a2d3860f337ad53Marc Dietrich 43032890b983086136fef8721363a2d3860f337ad53Marc Dietrich nvec->nvec_status_notifier.notifier_call = nvec_status_notifier; 43132890b983086136fef8721363a2d3860f337ad53Marc Dietrich nvec_register_notifier(nvec, &nvec->nvec_status_notifier, 0); 43232890b983086136fef8721363a2d3860f337ad53Marc Dietrich 43332890b983086136fef8721363a2d3860f337ad53Marc Dietrich nvec_power_handle = nvec; 43432890b983086136fef8721363a2d3860f337ad53Marc Dietrich pm_power_off = nvec_power_off; 43532890b983086136fef8721363a2d3860f337ad53Marc Dietrich 43632890b983086136fef8721363a2d3860f337ad53Marc Dietrich /* Get Firmware Version */ 43732890b983086136fef8721363a2d3860f337ad53Marc Dietrich msg = nvec_write_sync(nvec, EC_GET_FIRMWARE_VERSION, 438162c7d8c4be2d599583c42c2a8fe99bed6d87f67Marc Dietrich sizeof(EC_GET_FIRMWARE_VERSION)); 43932890b983086136fef8721363a2d3860f337ad53Marc Dietrich 44032890b983086136fef8721363a2d3860f337ad53Marc Dietrich dev_warn(nvec->dev, "ec firmware version %02x.%02x.%02x / %02x\n", 441162c7d8c4be2d599583c42c2a8fe99bed6d87f67Marc Dietrich msg->data[4], msg->data[5], msg->data[6], msg->data[7]); 44232890b983086136fef8721363a2d3860f337ad53Marc Dietrich 44332890b983086136fef8721363a2d3860f337ad53Marc Dietrich kfree(msg->data); 44432890b983086136fef8721363a2d3860f337ad53Marc Dietrich kfree(msg); 44532890b983086136fef8721363a2d3860f337ad53Marc Dietrich 446f686e9affba24cfdf94fb155aaeb36a1e14719f1Marc Dietrich ret = mfd_add_devices(nvec->dev, -1, nvec_devices, 447162c7d8c4be2d599583c42c2a8fe99bed6d87f67Marc Dietrich ARRAY_SIZE(nvec_devices), base, 0); 448162c7d8c4be2d599583c42c2a8fe99bed6d87f67Marc Dietrich if (ret) 449f686e9affba24cfdf94fb155aaeb36a1e14719f1Marc Dietrich dev_err(nvec->dev, "error adding subdevices\n"); 450f686e9affba24cfdf94fb155aaeb36a1e14719f1Marc Dietrich 45132890b983086136fef8721363a2d3860f337ad53Marc Dietrich /* unmute speakers? */ 4526dca320c8f16b464bb762494b509b2b02897054eMarc Dietrich nvec_write_async(nvec, "\x0d\x10\x59\x95", 4); 45332890b983086136fef8721363a2d3860f337ad53Marc Dietrich 45432890b983086136fef8721363a2d3860f337ad53Marc Dietrich /* enable lid switch event */ 45532890b983086136fef8721363a2d3860f337ad53Marc Dietrich nvec_write_async(nvec, "\x01\x01\x01\x00\x00\x02\x00", 7); 45632890b983086136fef8721363a2d3860f337ad53Marc Dietrich 45732890b983086136fef8721363a2d3860f337ad53Marc Dietrich /* enable power button event */ 45832890b983086136fef8721363a2d3860f337ad53Marc Dietrich nvec_write_async(nvec, "\x01\x01\x01\x00\x00\x80\x00", 7); 45932890b983086136fef8721363a2d3860f337ad53Marc Dietrich 46032890b983086136fef8721363a2d3860f337ad53Marc Dietrich return 0; 46132890b983086136fef8721363a2d3860f337ad53Marc Dietrich 462f686e9affba24cfdf94fb155aaeb36a1e14719f1Marc Dietricherr_iounmap: 463f686e9affba24cfdf94fb155aaeb36a1e14719f1Marc Dietrich iounmap(base); 46432890b983086136fef8721363a2d3860f337ad53Marc Dietrichfailed: 46532890b983086136fef8721363a2d3860f337ad53Marc Dietrich kfree(nvec); 46632890b983086136fef8721363a2d3860f337ad53Marc Dietrich return -ENOMEM; 46732890b983086136fef8721363a2d3860f337ad53Marc Dietrich} 46832890b983086136fef8721363a2d3860f337ad53Marc Dietrich 46932890b983086136fef8721363a2d3860f337ad53Marc Dietrichstatic int __devexit tegra_nvec_remove(struct platform_device *pdev) 47032890b983086136fef8721363a2d3860f337ad53Marc Dietrich{ 471f686e9affba24cfdf94fb155aaeb36a1e14719f1Marc Dietrich struct nvec_chip *nvec = platform_get_drvdata(pdev); 472f686e9affba24cfdf94fb155aaeb36a1e14719f1Marc Dietrich 473f686e9affba24cfdf94fb155aaeb36a1e14719f1Marc Dietrich nvec_write_async(nvec, EC_DISABLE_EVENT_REPORTING, 3); 474f686e9affba24cfdf94fb155aaeb36a1e14719f1Marc Dietrich mfd_remove_devices(nvec->dev); 475f686e9affba24cfdf94fb155aaeb36a1e14719f1Marc Dietrich free_irq(nvec->irq, &nvec_interrupt); 476f686e9affba24cfdf94fb155aaeb36a1e14719f1Marc Dietrich iounmap(nvec->base); 477f686e9affba24cfdf94fb155aaeb36a1e14719f1Marc Dietrich gpio_free(nvec->gpio); 478f686e9affba24cfdf94fb155aaeb36a1e14719f1Marc Dietrich kfree(nvec); 479f686e9affba24cfdf94fb155aaeb36a1e14719f1Marc Dietrich 48032890b983086136fef8721363a2d3860f337ad53Marc Dietrich return 0; 48132890b983086136fef8721363a2d3860f337ad53Marc Dietrich} 48232890b983086136fef8721363a2d3860f337ad53Marc Dietrich 48332890b983086136fef8721363a2d3860f337ad53Marc Dietrich#ifdef CONFIG_PM 48432890b983086136fef8721363a2d3860f337ad53Marc Dietrich 48532890b983086136fef8721363a2d3860f337ad53Marc Dietrichstatic int tegra_nvec_suspend(struct platform_device *pdev, pm_message_t state) 48632890b983086136fef8721363a2d3860f337ad53Marc Dietrich{ 48732890b983086136fef8721363a2d3860f337ad53Marc Dietrich struct nvec_chip *nvec = platform_get_drvdata(pdev); 48832890b983086136fef8721363a2d3860f337ad53Marc Dietrich 48932890b983086136fef8721363a2d3860f337ad53Marc Dietrich dev_dbg(nvec->dev, "suspending\n"); 49032890b983086136fef8721363a2d3860f337ad53Marc Dietrich nvec_write_async(nvec, EC_DISABLE_EVENT_REPORTING, 3); 49132890b983086136fef8721363a2d3860f337ad53Marc Dietrich nvec_write_async(nvec, "\x04\x02", 2); 492ac8107599e47b0f4638f4f3fb0141bbcf0cb142bMarc Dietrich nvec_disable_i2c_slave(nvec); 49332890b983086136fef8721363a2d3860f337ad53Marc Dietrich 49432890b983086136fef8721363a2d3860f337ad53Marc Dietrich return 0; 49532890b983086136fef8721363a2d3860f337ad53Marc Dietrich} 49632890b983086136fef8721363a2d3860f337ad53Marc Dietrich 497162c7d8c4be2d599583c42c2a8fe99bed6d87f67Marc Dietrichstatic int tegra_nvec_resume(struct platform_device *pdev) 498162c7d8c4be2d599583c42c2a8fe99bed6d87f67Marc Dietrich{ 49932890b983086136fef8721363a2d3860f337ad53Marc Dietrich struct nvec_chip *nvec = platform_get_drvdata(pdev); 50032890b983086136fef8721363a2d3860f337ad53Marc Dietrich 50132890b983086136fef8721363a2d3860f337ad53Marc Dietrich dev_dbg(nvec->dev, "resuming\n"); 502f686e9affba24cfdf94fb155aaeb36a1e14719f1Marc Dietrich tegra_init_i2c_slave(nvec); 50332890b983086136fef8721363a2d3860f337ad53Marc Dietrich nvec_write_async(nvec, EC_ENABLE_EVENT_REPORTING, 3); 50432890b983086136fef8721363a2d3860f337ad53Marc Dietrich 50532890b983086136fef8721363a2d3860f337ad53Marc Dietrich return 0; 50632890b983086136fef8721363a2d3860f337ad53Marc Dietrich} 50732890b983086136fef8721363a2d3860f337ad53Marc Dietrich 50832890b983086136fef8721363a2d3860f337ad53Marc Dietrich#else 50932890b983086136fef8721363a2d3860f337ad53Marc Dietrich#define tegra_nvec_suspend NULL 51032890b983086136fef8721363a2d3860f337ad53Marc Dietrich#define tegra_nvec_resume NULL 51132890b983086136fef8721363a2d3860f337ad53Marc Dietrich#endif 51232890b983086136fef8721363a2d3860f337ad53Marc Dietrich 513162c7d8c4be2d599583c42c2a8fe99bed6d87f67Marc Dietrichstatic struct platform_driver nvec_device_driver = { 514162c7d8c4be2d599583c42c2a8fe99bed6d87f67Marc Dietrich .probe = tegra_nvec_probe, 515162c7d8c4be2d599583c42c2a8fe99bed6d87f67Marc Dietrich .remove = __devexit_p(tegra_nvec_remove), 51632890b983086136fef8721363a2d3860f337ad53Marc Dietrich .suspend = tegra_nvec_suspend, 517162c7d8c4be2d599583c42c2a8fe99bed6d87f67Marc Dietrich .resume = tegra_nvec_resume, 518162c7d8c4be2d599583c42c2a8fe99bed6d87f67Marc Dietrich .driver = { 51932890b983086136fef8721363a2d3860f337ad53Marc Dietrich .name = "nvec", 52032890b983086136fef8721363a2d3860f337ad53Marc Dietrich .owner = THIS_MODULE, 52132890b983086136fef8721363a2d3860f337ad53Marc Dietrich } 52232890b983086136fef8721363a2d3860f337ad53Marc Dietrich}; 52332890b983086136fef8721363a2d3860f337ad53Marc Dietrich 52432890b983086136fef8721363a2d3860f337ad53Marc Dietrichstatic int __init tegra_nvec_init(void) 52532890b983086136fef8721363a2d3860f337ad53Marc Dietrich{ 52632890b983086136fef8721363a2d3860f337ad53Marc Dietrich return platform_driver_register(&nvec_device_driver); 52732890b983086136fef8721363a2d3860f337ad53Marc Dietrich} 52832890b983086136fef8721363a2d3860f337ad53Marc Dietrich 52932890b983086136fef8721363a2d3860f337ad53Marc Dietrichmodule_init(tegra_nvec_init); 530162c7d8c4be2d599583c42c2a8fe99bed6d87f67Marc Dietrich 53132890b983086136fef8721363a2d3860f337ad53Marc DietrichMODULE_ALIAS("platform:nvec"); 532162c7d8c4be2d599583c42c2a8fe99bed6d87f67Marc DietrichMODULE_DESCRIPTION("NVIDIA compliant embedded controller interface"); 533162c7d8c4be2d599583c42c2a8fe99bed6d87f67Marc DietrichMODULE_AUTHOR("Marc Dietrich <marvin24@gmx.de>"); 534162c7d8c4be2d599583c42c2a8fe99bed6d87f67Marc DietrichMODULE_LICENSE("GPL"); 535