nvec.c revision de839b8f06bc5dd3f5037c4409a720cbb9bf21c3
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> 9791c4a642721552204d8defdbd6a3e93cd411f79Julian Andres Klode * Julian Andres Klode <jak@jak-linux.org> 10162c7d8c4be2d599583c42c2a8fe99bed6d87f67Marc Dietrich * 11162c7d8c4be2d599583c42c2a8fe99bed6d87f67Marc Dietrich * This file is subject to the terms and conditions of the GNU General Public 12162c7d8c4be2d599583c42c2a8fe99bed6d87f67Marc Dietrich * License. See the file "COPYING" in the main directory of this archive 13162c7d8c4be2d599583c42c2a8fe99bed6d87f67Marc Dietrich * for more details. 14162c7d8c4be2d599583c42c2a8fe99bed6d87f67Marc Dietrich * 15162c7d8c4be2d599583c42c2a8fe99bed6d87f67Marc Dietrich */ 16162c7d8c4be2d599583c42c2a8fe99bed6d87f67Marc Dietrich 17162c7d8c4be2d599583c42c2a8fe99bed6d87f67Marc Dietrich/* #define DEBUG */ 1832890b983086136fef8721363a2d3860f337ad53Marc Dietrich 1912b5a55d725579d0978da67f26577224a1c40640Julian Andres Klode#include <linux/kernel.h> 200b1076c4b2a06e517fafbb2b4704f23e69b05386Julian Andres Klode#include <linux/atomic.h> 2112b5a55d725579d0978da67f26577224a1c40640Julian Andres Klode#include <linux/clk.h> 2232890b983086136fef8721363a2d3860f337ad53Marc Dietrich#include <linux/completion.h> 2312b5a55d725579d0978da67f26577224a1c40640Julian Andres Klode#include <linux/delay.h> 2412b5a55d725579d0978da67f26577224a1c40640Julian Andres Klode#include <linux/err.h> 2512b5a55d725579d0978da67f26577224a1c40640Julian Andres Klode#include <linux/gpio.h> 2632890b983086136fef8721363a2d3860f337ad53Marc Dietrich#include <linux/interrupt.h> 27162c7d8c4be2d599583c42c2a8fe99bed6d87f67Marc Dietrich#include <linux/io.h> 2832890b983086136fef8721363a2d3860f337ad53Marc Dietrich#include <linux/irq.h> 2932890b983086136fef8721363a2d3860f337ad53Marc Dietrich#include <linux/list.h> 3012b5a55d725579d0978da67f26577224a1c40640Julian Andres Klode#include <linux/mfd/core.h> 3112b5a55d725579d0978da67f26577224a1c40640Julian Andres Klode#include <linux/mutex.h> 3232890b983086136fef8721363a2d3860f337ad53Marc Dietrich#include <linux/notifier.h> 3332890b983086136fef8721363a2d3860f337ad53Marc Dietrich#include <linux/platform_device.h> 3412b5a55d725579d0978da67f26577224a1c40640Julian Andres Klode#include <linux/slab.h> 3512b5a55d725579d0978da67f26577224a1c40640Julian Andres Klode#include <linux/spinlock.h> 3612b5a55d725579d0978da67f26577224a1c40640Julian Andres Klode#include <linux/workqueue.h> 37162c7d8c4be2d599583c42c2a8fe99bed6d87f67Marc Dietrich 38162c7d8c4be2d599583c42c2a8fe99bed6d87f67Marc Dietrich#include <mach/clk.h> 3912b5a55d725579d0978da67f26577224a1c40640Julian Andres Klode#include <mach/iomap.h> 40162c7d8c4be2d599583c42c2a8fe99bed6d87f67Marc Dietrich 4132890b983086136fef8721363a2d3860f337ad53Marc Dietrich#include "nvec.h" 4232890b983086136fef8721363a2d3860f337ad53Marc Dietrich 43391d2fa95c8e5e5ad3b06af235ce4aeae6514966Julian Andres Klode#define I2C_CNFG 0x00 44391d2fa95c8e5e5ad3b06af235ce4aeae6514966Julian Andres Klode#define I2C_CNFG_PACKET_MODE_EN (1<<10) 45391d2fa95c8e5e5ad3b06af235ce4aeae6514966Julian Andres Klode#define I2C_CNFG_NEW_MASTER_SFM (1<<11) 46391d2fa95c8e5e5ad3b06af235ce4aeae6514966Julian Andres Klode#define I2C_CNFG_DEBOUNCE_CNT_SHIFT 12 47391d2fa95c8e5e5ad3b06af235ce4aeae6514966Julian Andres Klode 48391d2fa95c8e5e5ad3b06af235ce4aeae6514966Julian Andres Klode#define I2C_SL_CNFG 0x20 49391d2fa95c8e5e5ad3b06af235ce4aeae6514966Julian Andres Klode#define I2C_SL_NEWL (1<<2) 50391d2fa95c8e5e5ad3b06af235ce4aeae6514966Julian Andres Klode#define I2C_SL_NACK (1<<1) 51391d2fa95c8e5e5ad3b06af235ce4aeae6514966Julian Andres Klode#define I2C_SL_RESP (1<<0) 52391d2fa95c8e5e5ad3b06af235ce4aeae6514966Julian Andres Klode#define I2C_SL_IRQ (1<<3) 53391d2fa95c8e5e5ad3b06af235ce4aeae6514966Julian Andres Klode#define END_TRANS (1<<4) 54391d2fa95c8e5e5ad3b06af235ce4aeae6514966Julian Andres Klode#define RCVD (1<<2) 55391d2fa95c8e5e5ad3b06af235ce4aeae6514966Julian Andres Klode#define RNW (1<<1) 56391d2fa95c8e5e5ad3b06af235ce4aeae6514966Julian Andres Klode 57391d2fa95c8e5e5ad3b06af235ce4aeae6514966Julian Andres Klode#define I2C_SL_RCVD 0x24 58391d2fa95c8e5e5ad3b06af235ce4aeae6514966Julian Andres Klode#define I2C_SL_STATUS 0x28 59391d2fa95c8e5e5ad3b06af235ce4aeae6514966Julian Andres Klode#define I2C_SL_ADDR1 0x2c 60391d2fa95c8e5e5ad3b06af235ce4aeae6514966Julian Andres Klode#define I2C_SL_ADDR2 0x30 61391d2fa95c8e5e5ad3b06af235ce4aeae6514966Julian Andres Klode#define I2C_SL_DELAY_COUNT 0x3c 62391d2fa95c8e5e5ad3b06af235ce4aeae6514966Julian Andres Klode 63bb0590e2723eed53b524d61cf011d53fc7280949Julian Andres Klode/** 64bb0590e2723eed53b524d61cf011d53fc7280949Julian Andres Klode * enum nvec_msg_category - Message categories for nvec_msg_alloc() 65bb0590e2723eed53b524d61cf011d53fc7280949Julian Andres Klode * @NVEC_MSG_RX: The message is an incoming message (from EC) 66bb0590e2723eed53b524d61cf011d53fc7280949Julian Andres Klode * @NVEC_MSG_TX: The message is an outgoing message (to EC) 67bb0590e2723eed53b524d61cf011d53fc7280949Julian Andres Klode */ 68bb0590e2723eed53b524d61cf011d53fc7280949Julian Andres Klodeenum nvec_msg_category { 69bb0590e2723eed53b524d61cf011d53fc7280949Julian Andres Klode NVEC_MSG_RX, 70bb0590e2723eed53b524d61cf011d53fc7280949Julian Andres Klode NVEC_MSG_TX, 71bb0590e2723eed53b524d61cf011d53fc7280949Julian Andres Klode}; 72bb0590e2723eed53b524d61cf011d53fc7280949Julian Andres Klode 73162c7d8c4be2d599583c42c2a8fe99bed6d87f67Marc Dietrichstatic const unsigned char EC_DISABLE_EVENT_REPORTING[3] = "\x04\x00\x00"; 74162c7d8c4be2d599583c42c2a8fe99bed6d87f67Marc Dietrichstatic const unsigned char EC_ENABLE_EVENT_REPORTING[3] = "\x04\x00\x01"; 75162c7d8c4be2d599583c42c2a8fe99bed6d87f67Marc Dietrichstatic const unsigned char EC_GET_FIRMWARE_VERSION[2] = "\x07\x15"; 7632890b983086136fef8721363a2d3860f337ad53Marc Dietrich 7732890b983086136fef8721363a2d3860f337ad53Marc Dietrichstatic struct nvec_chip *nvec_power_handle; 7832890b983086136fef8721363a2d3860f337ad53Marc Dietrich 79f686e9affba24cfdf94fb155aaeb36a1e14719f1Marc Dietrichstatic struct mfd_cell nvec_devices[] = { 80f686e9affba24cfdf94fb155aaeb36a1e14719f1Marc Dietrich { 81162c7d8c4be2d599583c42c2a8fe99bed6d87f67Marc Dietrich .name = "nvec-kbd", 82162c7d8c4be2d599583c42c2a8fe99bed6d87f67Marc Dietrich .id = 1, 83f686e9affba24cfdf94fb155aaeb36a1e14719f1Marc Dietrich }, 84f686e9affba24cfdf94fb155aaeb36a1e14719f1Marc Dietrich { 85162c7d8c4be2d599583c42c2a8fe99bed6d87f67Marc Dietrich .name = "nvec-mouse", 86162c7d8c4be2d599583c42c2a8fe99bed6d87f67Marc Dietrich .id = 1, 87f686e9affba24cfdf94fb155aaeb36a1e14719f1Marc Dietrich }, 88f686e9affba24cfdf94fb155aaeb36a1e14719f1Marc Dietrich { 89162c7d8c4be2d599583c42c2a8fe99bed6d87f67Marc Dietrich .name = "nvec-power", 90162c7d8c4be2d599583c42c2a8fe99bed6d87f67Marc Dietrich .id = 1, 91f686e9affba24cfdf94fb155aaeb36a1e14719f1Marc Dietrich }, 92f686e9affba24cfdf94fb155aaeb36a1e14719f1Marc Dietrich { 93162c7d8c4be2d599583c42c2a8fe99bed6d87f67Marc Dietrich .name = "nvec-power", 94162c7d8c4be2d599583c42c2a8fe99bed6d87f67Marc Dietrich .id = 2, 95f686e9affba24cfdf94fb155aaeb36a1e14719f1Marc Dietrich }, 9697cc26576fa2b0eb1aad1b29515bb0a32f86c45cIlya Petrov { 9797cc26576fa2b0eb1aad1b29515bb0a32f86c45cIlya Petrov .name = "nvec-leds", 9897cc26576fa2b0eb1aad1b29515bb0a32f86c45cIlya Petrov .id = 1, 9997cc26576fa2b0eb1aad1b29515bb0a32f86c45cIlya Petrov }, 100f686e9affba24cfdf94fb155aaeb36a1e14719f1Marc Dietrich}; 101f686e9affba24cfdf94fb155aaeb36a1e14719f1Marc Dietrich 102bdf034d98676d143cb88f7b999a71fff5775fcd4Julian Andres Klode/** 103bdf034d98676d143cb88f7b999a71fff5775fcd4Julian Andres Klode * nvec_register_notifier - Register a notifier with nvec 104bdf034d98676d143cb88f7b999a71fff5775fcd4Julian Andres Klode * @nvec: A &struct nvec_chip 105bdf034d98676d143cb88f7b999a71fff5775fcd4Julian Andres Klode * @nb: The notifier block to register 106bdf034d98676d143cb88f7b999a71fff5775fcd4Julian Andres Klode * 107bdf034d98676d143cb88f7b999a71fff5775fcd4Julian Andres Klode * Registers a notifier with @nvec. The notifier will be added to an atomic 108bdf034d98676d143cb88f7b999a71fff5775fcd4Julian Andres Klode * notifier chain that is called for all received messages except those that 109bdf034d98676d143cb88f7b999a71fff5775fcd4Julian Andres Klode * correspond to a request initiated by nvec_write_sync(). 110bdf034d98676d143cb88f7b999a71fff5775fcd4Julian Andres Klode */ 11132890b983086136fef8721363a2d3860f337ad53Marc Dietrichint nvec_register_notifier(struct nvec_chip *nvec, struct notifier_block *nb, 112162c7d8c4be2d599583c42c2a8fe99bed6d87f67Marc Dietrich unsigned int events) 11332890b983086136fef8721363a2d3860f337ad53Marc Dietrich{ 11432890b983086136fef8721363a2d3860f337ad53Marc Dietrich return atomic_notifier_chain_register(&nvec->notifier_list, nb); 11532890b983086136fef8721363a2d3860f337ad53Marc Dietrich} 11632890b983086136fef8721363a2d3860f337ad53Marc DietrichEXPORT_SYMBOL_GPL(nvec_register_notifier); 11732890b983086136fef8721363a2d3860f337ad53Marc Dietrich 118bdf034d98676d143cb88f7b999a71fff5775fcd4Julian Andres Klode/** 119bdf034d98676d143cb88f7b999a71fff5775fcd4Julian Andres Klode * nvec_status_notifier - The final notifier 120bdf034d98676d143cb88f7b999a71fff5775fcd4Julian Andres Klode * 121bdf034d98676d143cb88f7b999a71fff5775fcd4Julian Andres Klode * Prints a message about control events not handled in the notifier 122bdf034d98676d143cb88f7b999a71fff5775fcd4Julian Andres Klode * chain. 123bdf034d98676d143cb88f7b999a71fff5775fcd4Julian Andres Klode */ 124162c7d8c4be2d599583c42c2a8fe99bed6d87f67Marc Dietrichstatic int nvec_status_notifier(struct notifier_block *nb, 125162c7d8c4be2d599583c42c2a8fe99bed6d87f67Marc Dietrich unsigned long event_type, void *data) 12632890b983086136fef8721363a2d3860f337ad53Marc Dietrich{ 12732890b983086136fef8721363a2d3860f337ad53Marc Dietrich unsigned char *msg = (unsigned char *)data; 12832890b983086136fef8721363a2d3860f337ad53Marc Dietrich 129162c7d8c4be2d599583c42c2a8fe99bed6d87f67Marc Dietrich if (event_type != NVEC_CNTL) 13032890b983086136fef8721363a2d3860f337ad53Marc Dietrich return NOTIFY_DONE; 13132890b983086136fef8721363a2d3860f337ad53Marc Dietrich 132a3a9aa1a41429b17aa1af20995850ea1b68d5ba2Marc Dietrich printk(KERN_WARNING "unhandled msg type %ld\n", event_type); 133a3a9aa1a41429b17aa1af20995850ea1b68d5ba2Marc Dietrich print_hex_dump(KERN_WARNING, "payload: ", DUMP_PREFIX_NONE, 16, 1, 134a3a9aa1a41429b17aa1af20995850ea1b68d5ba2Marc Dietrich msg, msg[1] + 2, true); 13532890b983086136fef8721363a2d3860f337ad53Marc Dietrich 13632890b983086136fef8721363a2d3860f337ad53Marc Dietrich return NOTIFY_OK; 13732890b983086136fef8721363a2d3860f337ad53Marc Dietrich} 13832890b983086136fef8721363a2d3860f337ad53Marc Dietrich 139bdf034d98676d143cb88f7b999a71fff5775fcd4Julian Andres Klode/** 140bdf034d98676d143cb88f7b999a71fff5775fcd4Julian Andres Klode * nvec_msg_alloc: 141bdf034d98676d143cb88f7b999a71fff5775fcd4Julian Andres Klode * @nvec: A &struct nvec_chip 142bb0590e2723eed53b524d61cf011d53fc7280949Julian Andres Klode * @category: Pool category, see &enum nvec_msg_category 143bdf034d98676d143cb88f7b999a71fff5775fcd4Julian Andres Klode * 144bdf034d98676d143cb88f7b999a71fff5775fcd4Julian Andres Klode * Allocate a single &struct nvec_msg object from the message pool of 145bdf034d98676d143cb88f7b999a71fff5775fcd4Julian Andres Klode * @nvec. The result shall be passed to nvec_msg_free() if no longer 146bdf034d98676d143cb88f7b999a71fff5775fcd4Julian Andres Klode * used. 147bb0590e2723eed53b524d61cf011d53fc7280949Julian Andres Klode * 148bb0590e2723eed53b524d61cf011d53fc7280949Julian Andres Klode * Outgoing messages are placed in the upper 75% of the pool, keeping the 149bb0590e2723eed53b524d61cf011d53fc7280949Julian Andres Klode * lower 25% available for RX buffers only. The reason is to prevent a 150bb0590e2723eed53b524d61cf011d53fc7280949Julian Andres Klode * situation where all buffers are full and a message is thus endlessly 151bb0590e2723eed53b524d61cf011d53fc7280949Julian Andres Klode * retried because the response could never be processed. 152bdf034d98676d143cb88f7b999a71fff5775fcd4Julian Andres Klode */ 153bb0590e2723eed53b524d61cf011d53fc7280949Julian Andres Klodestatic struct nvec_msg *nvec_msg_alloc(struct nvec_chip *nvec, 154bb0590e2723eed53b524d61cf011d53fc7280949Julian Andres Klode enum nvec_msg_category category) 1550b1076c4b2a06e517fafbb2b4704f23e69b05386Julian Andres Klode{ 156bb0590e2723eed53b524d61cf011d53fc7280949Julian Andres Klode int i = (category == NVEC_MSG_TX) ? (NVEC_POOL_SIZE / 4) : 0; 1570b1076c4b2a06e517fafbb2b4704f23e69b05386Julian Andres Klode 158bb0590e2723eed53b524d61cf011d53fc7280949Julian Andres Klode for (; i < NVEC_POOL_SIZE; i++) { 1590b1076c4b2a06e517fafbb2b4704f23e69b05386Julian Andres Klode if (atomic_xchg(&nvec->msg_pool[i].used, 1) == 0) { 1600b1076c4b2a06e517fafbb2b4704f23e69b05386Julian Andres Klode dev_vdbg(nvec->dev, "INFO: Allocate %i\n", i); 1610b1076c4b2a06e517fafbb2b4704f23e69b05386Julian Andres Klode return &nvec->msg_pool[i]; 1620b1076c4b2a06e517fafbb2b4704f23e69b05386Julian Andres Klode } 1630b1076c4b2a06e517fafbb2b4704f23e69b05386Julian Andres Klode } 1640b1076c4b2a06e517fafbb2b4704f23e69b05386Julian Andres Klode 165bb0590e2723eed53b524d61cf011d53fc7280949Julian Andres Klode dev_err(nvec->dev, "could not allocate %s buffer\n", 166bb0590e2723eed53b524d61cf011d53fc7280949Julian Andres Klode (category == NVEC_MSG_TX) ? "TX" : "RX"); 1670b1076c4b2a06e517fafbb2b4704f23e69b05386Julian Andres Klode 1680b1076c4b2a06e517fafbb2b4704f23e69b05386Julian Andres Klode return NULL; 1690b1076c4b2a06e517fafbb2b4704f23e69b05386Julian Andres Klode} 1700b1076c4b2a06e517fafbb2b4704f23e69b05386Julian Andres Klode 171bdf034d98676d143cb88f7b999a71fff5775fcd4Julian Andres Klode/** 172bdf034d98676d143cb88f7b999a71fff5775fcd4Julian Andres Klode * nvec_msg_free: 173bdf034d98676d143cb88f7b999a71fff5775fcd4Julian Andres Klode * @nvec: A &struct nvec_chip 174bdf034d98676d143cb88f7b999a71fff5775fcd4Julian Andres Klode * @msg: A message (must be allocated by nvec_msg_alloc() and belong to @nvec) 175bdf034d98676d143cb88f7b999a71fff5775fcd4Julian Andres Klode * 176bdf034d98676d143cb88f7b999a71fff5775fcd4Julian Andres Klode * Free the given message 177bdf034d98676d143cb88f7b999a71fff5775fcd4Julian Andres Klode */ 178198dd26714ba4a60ccc5ce70bc4506613b4f0c2dJulian Andres Klodeinline void nvec_msg_free(struct nvec_chip *nvec, struct nvec_msg *msg) 1790b1076c4b2a06e517fafbb2b4704f23e69b05386Julian Andres Klode{ 1807b77065793b8de101c7be3829b4ff8a4618a7172Julian Andres Klode if (msg != &nvec->tx_scratch) 1817b77065793b8de101c7be3829b4ff8a4618a7172Julian Andres Klode dev_vdbg(nvec->dev, "INFO: Free %ti\n", msg - nvec->msg_pool); 1820b1076c4b2a06e517fafbb2b4704f23e69b05386Julian Andres Klode atomic_set(&msg->used, 0); 1830b1076c4b2a06e517fafbb2b4704f23e69b05386Julian Andres Klode} 184198dd26714ba4a60ccc5ce70bc4506613b4f0c2dJulian Andres KlodeEXPORT_SYMBOL_GPL(nvec_msg_free); 1850b1076c4b2a06e517fafbb2b4704f23e69b05386Julian Andres Klode 1868517e879e0d11a277275616b9e1c749afe2fceffJulian Andres Klode/** 1878517e879e0d11a277275616b9e1c749afe2fceffJulian Andres Klode * nvec_msg_is_event - Return %true if @msg is an event 1888517e879e0d11a277275616b9e1c749afe2fceffJulian Andres Klode * @msg: A message 1898517e879e0d11a277275616b9e1c749afe2fceffJulian Andres Klode */ 1908517e879e0d11a277275616b9e1c749afe2fceffJulian Andres Klodestatic bool nvec_msg_is_event(struct nvec_msg *msg) 1918517e879e0d11a277275616b9e1c749afe2fceffJulian Andres Klode{ 1928517e879e0d11a277275616b9e1c749afe2fceffJulian Andres Klode return msg->data[0] >> 7; 1938517e879e0d11a277275616b9e1c749afe2fceffJulian Andres Klode} 1948517e879e0d11a277275616b9e1c749afe2fceffJulian Andres Klode 1958517e879e0d11a277275616b9e1c749afe2fceffJulian Andres Klode/** 1968517e879e0d11a277275616b9e1c749afe2fceffJulian Andres Klode * nvec_msg_size - Get the size of a message 1978517e879e0d11a277275616b9e1c749afe2fceffJulian Andres Klode * @msg: The message to get the size for 1988517e879e0d11a277275616b9e1c749afe2fceffJulian Andres Klode * 1998517e879e0d11a277275616b9e1c749afe2fceffJulian Andres Klode * This only works for received messages, not for outgoing messages. 2008517e879e0d11a277275616b9e1c749afe2fceffJulian Andres Klode */ 2018517e879e0d11a277275616b9e1c749afe2fceffJulian Andres Klodestatic size_t nvec_msg_size(struct nvec_msg *msg) 2028517e879e0d11a277275616b9e1c749afe2fceffJulian Andres Klode{ 2038517e879e0d11a277275616b9e1c749afe2fceffJulian Andres Klode bool is_event = nvec_msg_is_event(msg); 2048517e879e0d11a277275616b9e1c749afe2fceffJulian Andres Klode int event_length = (msg->data[0] & 0x60) >> 5; 2058517e879e0d11a277275616b9e1c749afe2fceffJulian Andres Klode 2068517e879e0d11a277275616b9e1c749afe2fceffJulian Andres Klode /* for variable size, payload size in byte 1 + count (1) + cmd (1) */ 2078517e879e0d11a277275616b9e1c749afe2fceffJulian Andres Klode if (!is_event || event_length == NVEC_VAR_SIZE) 2088517e879e0d11a277275616b9e1c749afe2fceffJulian Andres Klode return (msg->pos || msg->size) ? (msg->data[1] + 2) : 0; 2098517e879e0d11a277275616b9e1c749afe2fceffJulian Andres Klode else if (event_length == NVEC_2BYTES) 2108517e879e0d11a277275616b9e1c749afe2fceffJulian Andres Klode return 2; 2118517e879e0d11a277275616b9e1c749afe2fceffJulian Andres Klode else if (event_length == NVEC_3BYTES) 2128517e879e0d11a277275616b9e1c749afe2fceffJulian Andres Klode return 3; 2138517e879e0d11a277275616b9e1c749afe2fceffJulian Andres Klode else 2148517e879e0d11a277275616b9e1c749afe2fceffJulian Andres Klode return 0; 2158517e879e0d11a277275616b9e1c749afe2fceffJulian Andres Klode} 2168517e879e0d11a277275616b9e1c749afe2fceffJulian Andres Klode 217bdf034d98676d143cb88f7b999a71fff5775fcd4Julian Andres Klode/** 218bdf034d98676d143cb88f7b999a71fff5775fcd4Julian Andres Klode * nvec_gpio_set_value - Set the GPIO value 219bdf034d98676d143cb88f7b999a71fff5775fcd4Julian Andres Klode * @nvec: A &struct nvec_chip 220bdf034d98676d143cb88f7b999a71fff5775fcd4Julian Andres Klode * @value: The value to write (0 or 1) 221bdf034d98676d143cb88f7b999a71fff5775fcd4Julian Andres Klode * 222bdf034d98676d143cb88f7b999a71fff5775fcd4Julian Andres Klode * Like gpio_set_value(), but generating debugging information 223bdf034d98676d143cb88f7b999a71fff5775fcd4Julian Andres Klode */ 224e7c40851fd7989dad297988b6343f4e3cb687292Julian Andres Klodestatic void nvec_gpio_set_value(struct nvec_chip *nvec, int value) 225e7c40851fd7989dad297988b6343f4e3cb687292Julian Andres Klode{ 226e7c40851fd7989dad297988b6343f4e3cb687292Julian Andres Klode dev_dbg(nvec->dev, "GPIO changed from %u to %u\n", 227e7c40851fd7989dad297988b6343f4e3cb687292Julian Andres Klode gpio_get_value(nvec->gpio), value); 228e7c40851fd7989dad297988b6343f4e3cb687292Julian Andres Klode gpio_set_value(nvec->gpio, value); 229e7c40851fd7989dad297988b6343f4e3cb687292Julian Andres Klode} 230e7c40851fd7989dad297988b6343f4e3cb687292Julian Andres Klode 231bdf034d98676d143cb88f7b999a71fff5775fcd4Julian Andres Klode/** 232bdf034d98676d143cb88f7b999a71fff5775fcd4Julian Andres Klode * nvec_write_async - Asynchronously write a message to NVEC 233bdf034d98676d143cb88f7b999a71fff5775fcd4Julian Andres Klode * @nvec: An nvec_chip instance 234bdf034d98676d143cb88f7b999a71fff5775fcd4Julian Andres Klode * @data: The message data, starting with the request type 235bdf034d98676d143cb88f7b999a71fff5775fcd4Julian Andres Klode * @size: The size of @data 236bdf034d98676d143cb88f7b999a71fff5775fcd4Julian Andres Klode * 237bdf034d98676d143cb88f7b999a71fff5775fcd4Julian Andres Klode * Queue a single message to be transferred to the embedded controller 238bdf034d98676d143cb88f7b999a71fff5775fcd4Julian Andres Klode * and return immediately. 239bdf034d98676d143cb88f7b999a71fff5775fcd4Julian Andres Klode * 240bdf034d98676d143cb88f7b999a71fff5775fcd4Julian Andres Klode * Returns: 0 on success, a negative error code on failure. If a failure 241bdf034d98676d143cb88f7b999a71fff5775fcd4Julian Andres Klode * occured, the nvec driver may print an error. 242bdf034d98676d143cb88f7b999a71fff5775fcd4Julian Andres Klode */ 2431b9bf629ea42fdacd951b9190f86b028557bbe19Julian Andres Klodeint nvec_write_async(struct nvec_chip *nvec, const unsigned char *data, 244162c7d8c4be2d599583c42c2a8fe99bed6d87f67Marc Dietrich short size) 24532890b983086136fef8721363a2d3860f337ad53Marc Dietrich{ 2460cab4cb8526d7367c912c9a871d3ad1a9ac1fbf0Julian Andres Klode struct nvec_msg *msg; 2470cab4cb8526d7367c912c9a871d3ad1a9ac1fbf0Julian Andres Klode unsigned long flags; 24832890b983086136fef8721363a2d3860f337ad53Marc Dietrich 249bb0590e2723eed53b524d61cf011d53fc7280949Julian Andres Klode msg = nvec_msg_alloc(nvec, NVEC_MSG_TX); 250bb0590e2723eed53b524d61cf011d53fc7280949Julian Andres Klode 2511b9bf629ea42fdacd951b9190f86b028557bbe19Julian Andres Klode if (msg == NULL) 2521b9bf629ea42fdacd951b9190f86b028557bbe19Julian Andres Klode return -ENOMEM; 2531b9bf629ea42fdacd951b9190f86b028557bbe19Julian Andres Klode 25432890b983086136fef8721363a2d3860f337ad53Marc Dietrich msg->data[0] = size; 25532890b983086136fef8721363a2d3860f337ad53Marc Dietrich memcpy(msg->data + 1, data, size); 25632890b983086136fef8721363a2d3860f337ad53Marc Dietrich msg->size = size + 1; 25732890b983086136fef8721363a2d3860f337ad53Marc Dietrich 2580cab4cb8526d7367c912c9a871d3ad1a9ac1fbf0Julian Andres Klode spin_lock_irqsave(&nvec->tx_lock, flags); 25932890b983086136fef8721363a2d3860f337ad53Marc Dietrich list_add_tail(&msg->node, &nvec->tx_data); 2600cab4cb8526d7367c912c9a871d3ad1a9ac1fbf0Julian Andres Klode spin_unlock_irqrestore(&nvec->tx_lock, flags); 26132890b983086136fef8721363a2d3860f337ad53Marc Dietrich 2620cab4cb8526d7367c912c9a871d3ad1a9ac1fbf0Julian Andres Klode queue_work(nvec->wq, &nvec->tx_work); 2631b9bf629ea42fdacd951b9190f86b028557bbe19Julian Andres Klode 2641b9bf629ea42fdacd951b9190f86b028557bbe19Julian Andres Klode return 0; 26532890b983086136fef8721363a2d3860f337ad53Marc Dietrich} 26632890b983086136fef8721363a2d3860f337ad53Marc DietrichEXPORT_SYMBOL(nvec_write_async); 26732890b983086136fef8721363a2d3860f337ad53Marc Dietrich 268bdf034d98676d143cb88f7b999a71fff5775fcd4Julian Andres Klode/** 269bdf034d98676d143cb88f7b999a71fff5775fcd4Julian Andres Klode * nvec_write_sync - Write a message to nvec and read the response 270bdf034d98676d143cb88f7b999a71fff5775fcd4Julian Andres Klode * @nvec: An &struct nvec_chip 271bdf034d98676d143cb88f7b999a71fff5775fcd4Julian Andres Klode * @data: The data to write 272bdf034d98676d143cb88f7b999a71fff5775fcd4Julian Andres Klode * @size: The size of @data 273bdf034d98676d143cb88f7b999a71fff5775fcd4Julian Andres Klode * 274bdf034d98676d143cb88f7b999a71fff5775fcd4Julian Andres Klode * This is similar to nvec_write_async(), but waits for the 275bdf034d98676d143cb88f7b999a71fff5775fcd4Julian Andres Klode * request to be answered before returning. This function 276bdf034d98676d143cb88f7b999a71fff5775fcd4Julian Andres Klode * uses a mutex and can thus not be called from e.g. 277bdf034d98676d143cb88f7b999a71fff5775fcd4Julian Andres Klode * interrupt handlers. 278bdf034d98676d143cb88f7b999a71fff5775fcd4Julian Andres Klode * 279bdf034d98676d143cb88f7b999a71fff5775fcd4Julian Andres Klode * Returns: A pointer to the response message on success, 280198dd26714ba4a60ccc5ce70bc4506613b4f0c2dJulian Andres Klode * %NULL on failure. Free with nvec_msg_free() once no longer 281198dd26714ba4a60ccc5ce70bc4506613b4f0c2dJulian Andres Klode * used. 282bdf034d98676d143cb88f7b999a71fff5775fcd4Julian Andres Klode */ 2830cab4cb8526d7367c912c9a871d3ad1a9ac1fbf0Julian Andres Klodestruct nvec_msg *nvec_write_sync(struct nvec_chip *nvec, 2840cab4cb8526d7367c912c9a871d3ad1a9ac1fbf0Julian Andres Klode const unsigned char *data, short size) 2850cab4cb8526d7367c912c9a871d3ad1a9ac1fbf0Julian Andres Klode{ 2860cab4cb8526d7367c912c9a871d3ad1a9ac1fbf0Julian Andres Klode struct nvec_msg *msg; 2870cab4cb8526d7367c912c9a871d3ad1a9ac1fbf0Julian Andres Klode 2880cab4cb8526d7367c912c9a871d3ad1a9ac1fbf0Julian Andres Klode mutex_lock(&nvec->sync_write_mutex); 2890cab4cb8526d7367c912c9a871d3ad1a9ac1fbf0Julian Andres Klode 2900cab4cb8526d7367c912c9a871d3ad1a9ac1fbf0Julian Andres Klode nvec->sync_write_pending = (data[1] << 8) + data[0]; 2911b9bf629ea42fdacd951b9190f86b028557bbe19Julian Andres Klode 2921b9bf629ea42fdacd951b9190f86b028557bbe19Julian Andres Klode if (nvec_write_async(nvec, data, size) < 0) 2931b9bf629ea42fdacd951b9190f86b028557bbe19Julian Andres Klode return NULL; 2940cab4cb8526d7367c912c9a871d3ad1a9ac1fbf0Julian Andres Klode 2950cab4cb8526d7367c912c9a871d3ad1a9ac1fbf0Julian Andres Klode dev_dbg(nvec->dev, "nvec_sync_write: 0x%04x\n", 2960cab4cb8526d7367c912c9a871d3ad1a9ac1fbf0Julian Andres Klode nvec->sync_write_pending); 2970cab4cb8526d7367c912c9a871d3ad1a9ac1fbf0Julian Andres Klode if (!(wait_for_completion_timeout(&nvec->sync_write, 2980cab4cb8526d7367c912c9a871d3ad1a9ac1fbf0Julian Andres Klode msecs_to_jiffies(2000)))) { 2990cab4cb8526d7367c912c9a871d3ad1a9ac1fbf0Julian Andres Klode dev_warn(nvec->dev, "timeout waiting for sync write to complete\n"); 3000cab4cb8526d7367c912c9a871d3ad1a9ac1fbf0Julian Andres Klode mutex_unlock(&nvec->sync_write_mutex); 3010cab4cb8526d7367c912c9a871d3ad1a9ac1fbf0Julian Andres Klode return NULL; 3020cab4cb8526d7367c912c9a871d3ad1a9ac1fbf0Julian Andres Klode } 3030cab4cb8526d7367c912c9a871d3ad1a9ac1fbf0Julian Andres Klode 3040cab4cb8526d7367c912c9a871d3ad1a9ac1fbf0Julian Andres Klode dev_dbg(nvec->dev, "nvec_sync_write: pong!\n"); 3050cab4cb8526d7367c912c9a871d3ad1a9ac1fbf0Julian Andres Klode 3060cab4cb8526d7367c912c9a871d3ad1a9ac1fbf0Julian Andres Klode msg = nvec->last_sync_msg; 3070cab4cb8526d7367c912c9a871d3ad1a9ac1fbf0Julian Andres Klode 3080cab4cb8526d7367c912c9a871d3ad1a9ac1fbf0Julian Andres Klode mutex_unlock(&nvec->sync_write_mutex); 3090cab4cb8526d7367c912c9a871d3ad1a9ac1fbf0Julian Andres Klode 3100cab4cb8526d7367c912c9a871d3ad1a9ac1fbf0Julian Andres Klode return msg; 3110cab4cb8526d7367c912c9a871d3ad1a9ac1fbf0Julian Andres Klode} 3120cab4cb8526d7367c912c9a871d3ad1a9ac1fbf0Julian Andres KlodeEXPORT_SYMBOL(nvec_write_sync); 3130cab4cb8526d7367c912c9a871d3ad1a9ac1fbf0Julian Andres Klode 314bdf034d98676d143cb88f7b999a71fff5775fcd4Julian Andres Klode/** 315bdf034d98676d143cb88f7b999a71fff5775fcd4Julian Andres Klode * nvec_request_master - Process outgoing messages 316bdf034d98676d143cb88f7b999a71fff5775fcd4Julian Andres Klode * @work: A &struct work_struct (the tx_worker member of &struct nvec_chip) 317bdf034d98676d143cb88f7b999a71fff5775fcd4Julian Andres Klode * 318bdf034d98676d143cb88f7b999a71fff5775fcd4Julian Andres Klode * Processes all outgoing requests by sending the request and awaiting the 319bdf034d98676d143cb88f7b999a71fff5775fcd4Julian Andres Klode * response, then continuing with the next request. Once a request has a 320bdf034d98676d143cb88f7b999a71fff5775fcd4Julian Andres Klode * matching response, it will be freed and removed from the list. 321bdf034d98676d143cb88f7b999a71fff5775fcd4Julian Andres Klode */ 32232890b983086136fef8721363a2d3860f337ad53Marc Dietrichstatic void nvec_request_master(struct work_struct *work) 32332890b983086136fef8721363a2d3860f337ad53Marc Dietrich{ 32432890b983086136fef8721363a2d3860f337ad53Marc Dietrich struct nvec_chip *nvec = container_of(work, struct nvec_chip, tx_work); 3250cab4cb8526d7367c912c9a871d3ad1a9ac1fbf0Julian Andres Klode unsigned long flags; 3260cab4cb8526d7367c912c9a871d3ad1a9ac1fbf0Julian Andres Klode long err; 3270cab4cb8526d7367c912c9a871d3ad1a9ac1fbf0Julian Andres Klode struct nvec_msg *msg; 3280cab4cb8526d7367c912c9a871d3ad1a9ac1fbf0Julian Andres Klode 3290cab4cb8526d7367c912c9a871d3ad1a9ac1fbf0Julian Andres Klode spin_lock_irqsave(&nvec->tx_lock, flags); 3300cab4cb8526d7367c912c9a871d3ad1a9ac1fbf0Julian Andres Klode while (!list_empty(&nvec->tx_data)) { 3310cab4cb8526d7367c912c9a871d3ad1a9ac1fbf0Julian Andres Klode msg = list_first_entry(&nvec->tx_data, struct nvec_msg, node); 3320cab4cb8526d7367c912c9a871d3ad1a9ac1fbf0Julian Andres Klode spin_unlock_irqrestore(&nvec->tx_lock, flags); 3330cab4cb8526d7367c912c9a871d3ad1a9ac1fbf0Julian Andres Klode nvec_gpio_set_value(nvec, 0); 3340cab4cb8526d7367c912c9a871d3ad1a9ac1fbf0Julian Andres Klode err = wait_for_completion_interruptible_timeout( 3350cab4cb8526d7367c912c9a871d3ad1a9ac1fbf0Julian Andres Klode &nvec->ec_transfer, msecs_to_jiffies(5000)); 3360cab4cb8526d7367c912c9a871d3ad1a9ac1fbf0Julian Andres Klode 3370cab4cb8526d7367c912c9a871d3ad1a9ac1fbf0Julian Andres Klode if (err == 0) { 3380cab4cb8526d7367c912c9a871d3ad1a9ac1fbf0Julian Andres Klode dev_warn(nvec->dev, "timeout waiting for ec transfer\n"); 3390cab4cb8526d7367c912c9a871d3ad1a9ac1fbf0Julian Andres Klode nvec_gpio_set_value(nvec, 1); 3400cab4cb8526d7367c912c9a871d3ad1a9ac1fbf0Julian Andres Klode msg->pos = 0; 3410cab4cb8526d7367c912c9a871d3ad1a9ac1fbf0Julian Andres Klode } 34232890b983086136fef8721363a2d3860f337ad53Marc Dietrich 3430cab4cb8526d7367c912c9a871d3ad1a9ac1fbf0Julian Andres Klode spin_lock_irqsave(&nvec->tx_lock, flags); 3440cab4cb8526d7367c912c9a871d3ad1a9ac1fbf0Julian Andres Klode 3450cab4cb8526d7367c912c9a871d3ad1a9ac1fbf0Julian Andres Klode if (err > 0) { 3460cab4cb8526d7367c912c9a871d3ad1a9ac1fbf0Julian Andres Klode list_del_init(&msg->node); 3470cab4cb8526d7367c912c9a871d3ad1a9ac1fbf0Julian Andres Klode nvec_msg_free(nvec, msg); 3480cab4cb8526d7367c912c9a871d3ad1a9ac1fbf0Julian Andres Klode } 3490cab4cb8526d7367c912c9a871d3ad1a9ac1fbf0Julian Andres Klode } 3500cab4cb8526d7367c912c9a871d3ad1a9ac1fbf0Julian Andres Klode spin_unlock_irqrestore(&nvec->tx_lock, flags); 35132890b983086136fef8721363a2d3860f337ad53Marc Dietrich} 35232890b983086136fef8721363a2d3860f337ad53Marc Dietrich 353bdf034d98676d143cb88f7b999a71fff5775fcd4Julian Andres Klode/** 354bdf034d98676d143cb88f7b999a71fff5775fcd4Julian Andres Klode * parse_msg - Print some information and call the notifiers on an RX message 355bdf034d98676d143cb88f7b999a71fff5775fcd4Julian Andres Klode * @nvec: A &struct nvec_chip 356bdf034d98676d143cb88f7b999a71fff5775fcd4Julian Andres Klode * @msg: A message received by @nvec 357bdf034d98676d143cb88f7b999a71fff5775fcd4Julian Andres Klode * 358bdf034d98676d143cb88f7b999a71fff5775fcd4Julian Andres Klode * Paarse some pieces of the message and then call the chain of notifiers 359bdf034d98676d143cb88f7b999a71fff5775fcd4Julian Andres Klode * registered via nvec_register_notifier. 360bdf034d98676d143cb88f7b999a71fff5775fcd4Julian Andres Klode */ 36132890b983086136fef8721363a2d3860f337ad53Marc Dietrichstatic int parse_msg(struct nvec_chip *nvec, struct nvec_msg *msg) 36232890b983086136fef8721363a2d3860f337ad53Marc Dietrich{ 363162c7d8c4be2d599583c42c2a8fe99bed6d87f67Marc Dietrich if ((msg->data[0] & 1 << 7) == 0 && msg->data[3]) { 364162c7d8c4be2d599583c42c2a8fe99bed6d87f67Marc Dietrich dev_err(nvec->dev, "ec responded %02x %02x %02x %02x\n", 365162c7d8c4be2d599583c42c2a8fe99bed6d87f67Marc Dietrich msg->data[0], msg->data[1], msg->data[2], msg->data[3]); 36632890b983086136fef8721363a2d3860f337ad53Marc Dietrich return -EINVAL; 36732890b983086136fef8721363a2d3860f337ad53Marc Dietrich } 36832890b983086136fef8721363a2d3860f337ad53Marc Dietrich 369a3a9aa1a41429b17aa1af20995850ea1b68d5ba2Marc Dietrich if ((msg->data[0] >> 7) == 1 && (msg->data[0] & 0x0f) == 5) 370a3a9aa1a41429b17aa1af20995850ea1b68d5ba2Marc Dietrich print_hex_dump(KERN_WARNING, "ec system event ", 371a3a9aa1a41429b17aa1af20995850ea1b68d5ba2Marc Dietrich DUMP_PREFIX_NONE, 16, 1, msg->data, 372a3a9aa1a41429b17aa1af20995850ea1b68d5ba2Marc Dietrich msg->data[1] + 2, true); 37332890b983086136fef8721363a2d3860f337ad53Marc Dietrich 374162c7d8c4be2d599583c42c2a8fe99bed6d87f67Marc Dietrich atomic_notifier_call_chain(&nvec->notifier_list, msg->data[0] & 0x8f, 375162c7d8c4be2d599583c42c2a8fe99bed6d87f67Marc Dietrich msg->data); 37632890b983086136fef8721363a2d3860f337ad53Marc Dietrich 37732890b983086136fef8721363a2d3860f337ad53Marc Dietrich return 0; 37832890b983086136fef8721363a2d3860f337ad53Marc Dietrich} 37932890b983086136fef8721363a2d3860f337ad53Marc Dietrich 380bdf034d98676d143cb88f7b999a71fff5775fcd4Julian Andres Klode/** 381bdf034d98676d143cb88f7b999a71fff5775fcd4Julian Andres Klode * nvec_dispatch - Process messages received from the EC 382bdf034d98676d143cb88f7b999a71fff5775fcd4Julian Andres Klode * @work: A &struct work_struct (the tx_worker member of &struct nvec_chip) 383bdf034d98676d143cb88f7b999a71fff5775fcd4Julian Andres Klode * 384bdf034d98676d143cb88f7b999a71fff5775fcd4Julian Andres Klode * Process messages previously received from the EC and put into the RX 385bdf034d98676d143cb88f7b999a71fff5775fcd4Julian Andres Klode * queue of the &struct nvec_chip instance associated with @work. 386bdf034d98676d143cb88f7b999a71fff5775fcd4Julian Andres Klode */ 38732890b983086136fef8721363a2d3860f337ad53Marc Dietrichstatic void nvec_dispatch(struct work_struct *work) 38832890b983086136fef8721363a2d3860f337ad53Marc Dietrich{ 38932890b983086136fef8721363a2d3860f337ad53Marc Dietrich struct nvec_chip *nvec = container_of(work, struct nvec_chip, rx_work); 3900cab4cb8526d7367c912c9a871d3ad1a9ac1fbf0Julian Andres Klode unsigned long flags; 39132890b983086136fef8721363a2d3860f337ad53Marc Dietrich struct nvec_msg *msg; 39232890b983086136fef8721363a2d3860f337ad53Marc Dietrich 3930cab4cb8526d7367c912c9a871d3ad1a9ac1fbf0Julian Andres Klode spin_lock_irqsave(&nvec->rx_lock, flags); 394162c7d8c4be2d599583c42c2a8fe99bed6d87f67Marc Dietrich while (!list_empty(&nvec->rx_data)) { 39532890b983086136fef8721363a2d3860f337ad53Marc Dietrich msg = list_first_entry(&nvec->rx_data, struct nvec_msg, node); 39632890b983086136fef8721363a2d3860f337ad53Marc Dietrich list_del_init(&msg->node); 3970cab4cb8526d7367c912c9a871d3ad1a9ac1fbf0Julian Andres Klode spin_unlock_irqrestore(&nvec->rx_lock, flags); 39832890b983086136fef8721363a2d3860f337ad53Marc Dietrich 399162c7d8c4be2d599583c42c2a8fe99bed6d87f67Marc Dietrich if (nvec->sync_write_pending == 4000cab4cb8526d7367c912c9a871d3ad1a9ac1fbf0Julian Andres Klode (msg->data[2] << 8) + msg->data[0]) { 40132890b983086136fef8721363a2d3860f337ad53Marc Dietrich dev_dbg(nvec->dev, "sync write completed!\n"); 40232890b983086136fef8721363a2d3860f337ad53Marc Dietrich nvec->sync_write_pending = 0; 40332890b983086136fef8721363a2d3860f337ad53Marc Dietrich nvec->last_sync_msg = msg; 40432890b983086136fef8721363a2d3860f337ad53Marc Dietrich complete(&nvec->sync_write); 40532890b983086136fef8721363a2d3860f337ad53Marc Dietrich } else { 40632890b983086136fef8721363a2d3860f337ad53Marc Dietrich parse_msg(nvec, msg); 4070cab4cb8526d7367c912c9a871d3ad1a9ac1fbf0Julian Andres Klode nvec_msg_free(nvec, msg); 40832890b983086136fef8721363a2d3860f337ad53Marc Dietrich } 4090cab4cb8526d7367c912c9a871d3ad1a9ac1fbf0Julian Andres Klode spin_lock_irqsave(&nvec->rx_lock, flags); 41032890b983086136fef8721363a2d3860f337ad53Marc Dietrich } 4110cab4cb8526d7367c912c9a871d3ad1a9ac1fbf0Julian Andres Klode spin_unlock_irqrestore(&nvec->rx_lock, flags); 41232890b983086136fef8721363a2d3860f337ad53Marc Dietrich} 41332890b983086136fef8721363a2d3860f337ad53Marc Dietrich 414bdf034d98676d143cb88f7b999a71fff5775fcd4Julian Andres Klode/** 415bdf034d98676d143cb88f7b999a71fff5775fcd4Julian Andres Klode * nvec_tx_completed - Complete the current transfer 416bdf034d98676d143cb88f7b999a71fff5775fcd4Julian Andres Klode * @nvec: A &struct nvec_chip 417bdf034d98676d143cb88f7b999a71fff5775fcd4Julian Andres Klode * 418bdf034d98676d143cb88f7b999a71fff5775fcd4Julian Andres Klode * This is called when we have received an END_TRANS on a TX transfer. 419bdf034d98676d143cb88f7b999a71fff5775fcd4Julian Andres Klode */ 4200cab4cb8526d7367c912c9a871d3ad1a9ac1fbf0Julian Andres Klodestatic void nvec_tx_completed(struct nvec_chip *nvec) 4210cab4cb8526d7367c912c9a871d3ad1a9ac1fbf0Julian Andres Klode{ 4220cab4cb8526d7367c912c9a871d3ad1a9ac1fbf0Julian Andres Klode /* We got an END_TRANS, let's skip this, maybe there's an event */ 4230cab4cb8526d7367c912c9a871d3ad1a9ac1fbf0Julian Andres Klode if (nvec->tx->pos != nvec->tx->size) { 4240cab4cb8526d7367c912c9a871d3ad1a9ac1fbf0Julian Andres Klode dev_err(nvec->dev, "premature END_TRANS, resending\n"); 4250cab4cb8526d7367c912c9a871d3ad1a9ac1fbf0Julian Andres Klode nvec->tx->pos = 0; 4260cab4cb8526d7367c912c9a871d3ad1a9ac1fbf0Julian Andres Klode nvec_gpio_set_value(nvec, 0); 4270cab4cb8526d7367c912c9a871d3ad1a9ac1fbf0Julian Andres Klode } else { 4280cab4cb8526d7367c912c9a871d3ad1a9ac1fbf0Julian Andres Klode nvec->state = 0; 4290cab4cb8526d7367c912c9a871d3ad1a9ac1fbf0Julian Andres Klode } 4300cab4cb8526d7367c912c9a871d3ad1a9ac1fbf0Julian Andres Klode} 4310cab4cb8526d7367c912c9a871d3ad1a9ac1fbf0Julian Andres Klode 432bdf034d98676d143cb88f7b999a71fff5775fcd4Julian Andres Klode/** 433bdf034d98676d143cb88f7b999a71fff5775fcd4Julian Andres Klode * nvec_rx_completed - Complete the current transfer 434bdf034d98676d143cb88f7b999a71fff5775fcd4Julian Andres Klode * @nvec: A &struct nvec_chip 435bdf034d98676d143cb88f7b999a71fff5775fcd4Julian Andres Klode * 436bdf034d98676d143cb88f7b999a71fff5775fcd4Julian Andres Klode * This is called when we have received an END_TRANS on a RX transfer. 437bdf034d98676d143cb88f7b999a71fff5775fcd4Julian Andres Klode */ 4380cab4cb8526d7367c912c9a871d3ad1a9ac1fbf0Julian Andres Klodestatic void nvec_rx_completed(struct nvec_chip *nvec) 4390cab4cb8526d7367c912c9a871d3ad1a9ac1fbf0Julian Andres Klode{ 440210ceb4f68dcc7bede2e3af547abd6f661a7bfdaJulian Andres Klode if (nvec->rx->pos != nvec_msg_size(nvec->rx)) { 4410cab4cb8526d7367c912c9a871d3ad1a9ac1fbf0Julian Andres Klode dev_err(nvec->dev, "RX incomplete: Expected %u bytes, got %u\n", 4420cab4cb8526d7367c912c9a871d3ad1a9ac1fbf0Julian Andres Klode (uint) nvec_msg_size(nvec->rx), 4430cab4cb8526d7367c912c9a871d3ad1a9ac1fbf0Julian Andres Klode (uint) nvec->rx->pos); 4440cab4cb8526d7367c912c9a871d3ad1a9ac1fbf0Julian Andres Klode 445210ceb4f68dcc7bede2e3af547abd6f661a7bfdaJulian Andres Klode nvec_msg_free(nvec, nvec->rx); 446210ceb4f68dcc7bede2e3af547abd6f661a7bfdaJulian Andres Klode nvec->state = 0; 447d6bdcf2e1019351cbc176e963b7756766bdd8721Julian Andres Klode 448d6bdcf2e1019351cbc176e963b7756766bdd8721Julian Andres Klode /* Battery quirk - Often incomplete, and likes to crash */ 449d6bdcf2e1019351cbc176e963b7756766bdd8721Julian Andres Klode if (nvec->rx->data[0] == NVEC_BAT) 450d6bdcf2e1019351cbc176e963b7756766bdd8721Julian Andres Klode complete(&nvec->ec_transfer); 451d6bdcf2e1019351cbc176e963b7756766bdd8721Julian Andres Klode 452210ceb4f68dcc7bede2e3af547abd6f661a7bfdaJulian Andres Klode return; 453210ceb4f68dcc7bede2e3af547abd6f661a7bfdaJulian Andres Klode } 454210ceb4f68dcc7bede2e3af547abd6f661a7bfdaJulian Andres Klode 4550cab4cb8526d7367c912c9a871d3ad1a9ac1fbf0Julian Andres Klode spin_lock(&nvec->rx_lock); 4560cab4cb8526d7367c912c9a871d3ad1a9ac1fbf0Julian Andres Klode 4570cab4cb8526d7367c912c9a871d3ad1a9ac1fbf0Julian Andres Klode /* add the received data to the work list 4580cab4cb8526d7367c912c9a871d3ad1a9ac1fbf0Julian Andres Klode and move the ring buffer pointer to the next entry */ 4590cab4cb8526d7367c912c9a871d3ad1a9ac1fbf0Julian Andres Klode list_add_tail(&nvec->rx->node, &nvec->rx_data); 4600cab4cb8526d7367c912c9a871d3ad1a9ac1fbf0Julian Andres Klode 4610cab4cb8526d7367c912c9a871d3ad1a9ac1fbf0Julian Andres Klode spin_unlock(&nvec->rx_lock); 4620cab4cb8526d7367c912c9a871d3ad1a9ac1fbf0Julian Andres Klode 4630cab4cb8526d7367c912c9a871d3ad1a9ac1fbf0Julian Andres Klode nvec->state = 0; 4640cab4cb8526d7367c912c9a871d3ad1a9ac1fbf0Julian Andres Klode 4650cab4cb8526d7367c912c9a871d3ad1a9ac1fbf0Julian Andres Klode if (!nvec_msg_is_event(nvec->rx)) 4660cab4cb8526d7367c912c9a871d3ad1a9ac1fbf0Julian Andres Klode complete(&nvec->ec_transfer); 4670cab4cb8526d7367c912c9a871d3ad1a9ac1fbf0Julian Andres Klode 4680cab4cb8526d7367c912c9a871d3ad1a9ac1fbf0Julian Andres Klode queue_work(nvec->wq, &nvec->rx_work); 4690cab4cb8526d7367c912c9a871d3ad1a9ac1fbf0Julian Andres Klode} 4700cab4cb8526d7367c912c9a871d3ad1a9ac1fbf0Julian Andres Klode 4710cab4cb8526d7367c912c9a871d3ad1a9ac1fbf0Julian Andres Klode/** 4720cab4cb8526d7367c912c9a871d3ad1a9ac1fbf0Julian Andres Klode * nvec_invalid_flags - Send an error message about invalid flags and jump 4730cab4cb8526d7367c912c9a871d3ad1a9ac1fbf0Julian Andres Klode * @nvec: The nvec device 4740cab4cb8526d7367c912c9a871d3ad1a9ac1fbf0Julian Andres Klode * @status: The status flags 4750cab4cb8526d7367c912c9a871d3ad1a9ac1fbf0Julian Andres Klode * @reset: Whether we shall jump to state 0. 4760cab4cb8526d7367c912c9a871d3ad1a9ac1fbf0Julian Andres Klode */ 4770cab4cb8526d7367c912c9a871d3ad1a9ac1fbf0Julian Andres Klodestatic void nvec_invalid_flags(struct nvec_chip *nvec, unsigned int status, 4780cab4cb8526d7367c912c9a871d3ad1a9ac1fbf0Julian Andres Klode bool reset) 4790cab4cb8526d7367c912c9a871d3ad1a9ac1fbf0Julian Andres Klode{ 4800cab4cb8526d7367c912c9a871d3ad1a9ac1fbf0Julian Andres Klode dev_err(nvec->dev, "unexpected status flags 0x%02x during state %i\n", 4810cab4cb8526d7367c912c9a871d3ad1a9ac1fbf0Julian Andres Klode status, nvec->state); 4820cab4cb8526d7367c912c9a871d3ad1a9ac1fbf0Julian Andres Klode if (reset) 4830cab4cb8526d7367c912c9a871d3ad1a9ac1fbf0Julian Andres Klode nvec->state = 0; 4840cab4cb8526d7367c912c9a871d3ad1a9ac1fbf0Julian Andres Klode} 4850cab4cb8526d7367c912c9a871d3ad1a9ac1fbf0Julian Andres Klode 4860cab4cb8526d7367c912c9a871d3ad1a9ac1fbf0Julian Andres Klode/** 4870cab4cb8526d7367c912c9a871d3ad1a9ac1fbf0Julian Andres Klode * nvec_tx_set - Set the message to transfer (nvec->tx) 488bdf034d98676d143cb88f7b999a71fff5775fcd4Julian Andres Klode * @nvec: A &struct nvec_chip 489bdf034d98676d143cb88f7b999a71fff5775fcd4Julian Andres Klode * 490bdf034d98676d143cb88f7b999a71fff5775fcd4Julian Andres Klode * Gets the first entry from the tx_data list of @nvec and sets the 491bdf034d98676d143cb88f7b999a71fff5775fcd4Julian Andres Klode * tx member to it. If the tx_data list is empty, this uses the 492bdf034d98676d143cb88f7b999a71fff5775fcd4Julian Andres Klode * tx_scratch message to send a no operation message. 4930cab4cb8526d7367c912c9a871d3ad1a9ac1fbf0Julian Andres Klode */ 4940cab4cb8526d7367c912c9a871d3ad1a9ac1fbf0Julian Andres Klodestatic void nvec_tx_set(struct nvec_chip *nvec) 4950cab4cb8526d7367c912c9a871d3ad1a9ac1fbf0Julian Andres Klode{ 4960cab4cb8526d7367c912c9a871d3ad1a9ac1fbf0Julian Andres Klode spin_lock(&nvec->tx_lock); 4970cab4cb8526d7367c912c9a871d3ad1a9ac1fbf0Julian Andres Klode if (list_empty(&nvec->tx_data)) { 4980cab4cb8526d7367c912c9a871d3ad1a9ac1fbf0Julian Andres Klode dev_err(nvec->dev, "empty tx - sending no-op\n"); 4990cab4cb8526d7367c912c9a871d3ad1a9ac1fbf0Julian Andres Klode memcpy(nvec->tx_scratch.data, "\x02\x07\x02", 3); 5000cab4cb8526d7367c912c9a871d3ad1a9ac1fbf0Julian Andres Klode nvec->tx_scratch.size = 3; 5010cab4cb8526d7367c912c9a871d3ad1a9ac1fbf0Julian Andres Klode nvec->tx_scratch.pos = 0; 5020cab4cb8526d7367c912c9a871d3ad1a9ac1fbf0Julian Andres Klode nvec->tx = &nvec->tx_scratch; 5030cab4cb8526d7367c912c9a871d3ad1a9ac1fbf0Julian Andres Klode list_add_tail(&nvec->tx->node, &nvec->tx_data); 5040cab4cb8526d7367c912c9a871d3ad1a9ac1fbf0Julian Andres Klode } else { 5050cab4cb8526d7367c912c9a871d3ad1a9ac1fbf0Julian Andres Klode nvec->tx = list_first_entry(&nvec->tx_data, struct nvec_msg, 5060cab4cb8526d7367c912c9a871d3ad1a9ac1fbf0Julian Andres Klode node); 5070cab4cb8526d7367c912c9a871d3ad1a9ac1fbf0Julian Andres Klode nvec->tx->pos = 0; 5080cab4cb8526d7367c912c9a871d3ad1a9ac1fbf0Julian Andres Klode } 5090cab4cb8526d7367c912c9a871d3ad1a9ac1fbf0Julian Andres Klode spin_unlock(&nvec->tx_lock); 5100cab4cb8526d7367c912c9a871d3ad1a9ac1fbf0Julian Andres Klode 5110cab4cb8526d7367c912c9a871d3ad1a9ac1fbf0Julian Andres Klode dev_dbg(nvec->dev, "Sending message of length %u, command 0x%x\n", 5120cab4cb8526d7367c912c9a871d3ad1a9ac1fbf0Julian Andres Klode (uint)nvec->tx->size, nvec->tx->data[1]); 5130cab4cb8526d7367c912c9a871d3ad1a9ac1fbf0Julian Andres Klode} 5140cab4cb8526d7367c912c9a871d3ad1a9ac1fbf0Julian Andres Klode 5150cab4cb8526d7367c912c9a871d3ad1a9ac1fbf0Julian Andres Klode/** 5160cab4cb8526d7367c912c9a871d3ad1a9ac1fbf0Julian Andres Klode * nvec_interrupt - Interrupt handler 5170cab4cb8526d7367c912c9a871d3ad1a9ac1fbf0Julian Andres Klode * @irq: The IRQ 5180cab4cb8526d7367c912c9a871d3ad1a9ac1fbf0Julian Andres Klode * @dev: The nvec device 519bdf034d98676d143cb88f7b999a71fff5775fcd4Julian Andres Klode * 520bdf034d98676d143cb88f7b999a71fff5775fcd4Julian Andres Klode * Interrupt handler that fills our RX buffers and empties our TX 521bdf034d98676d143cb88f7b999a71fff5775fcd4Julian Andres Klode * buffers. This uses a finite state machine with ridiculous amounts 522bdf034d98676d143cb88f7b999a71fff5775fcd4Julian Andres Klode * of error checking, in order to be fairly reliable. 5230cab4cb8526d7367c912c9a871d3ad1a9ac1fbf0Julian Andres Klode */ 524f686e9affba24cfdf94fb155aaeb36a1e14719f1Marc Dietrichstatic irqreturn_t nvec_interrupt(int irq, void *dev) 52532890b983086136fef8721363a2d3860f337ad53Marc Dietrich{ 52632890b983086136fef8721363a2d3860f337ad53Marc Dietrich unsigned long status; 5270cab4cb8526d7367c912c9a871d3ad1a9ac1fbf0Julian Andres Klode unsigned int received = 0; 5280cab4cb8526d7367c912c9a871d3ad1a9ac1fbf0Julian Andres Klode unsigned char to_send = 0xff; 5290cab4cb8526d7367c912c9a871d3ad1a9ac1fbf0Julian Andres Klode const unsigned long irq_mask = I2C_SL_IRQ | END_TRANS | RCVD | RNW; 5300cab4cb8526d7367c912c9a871d3ad1a9ac1fbf0Julian Andres Klode struct nvec_chip *nvec = dev; 5310cab4cb8526d7367c912c9a871d3ad1a9ac1fbf0Julian Andres Klode unsigned int state = nvec->state; 53232890b983086136fef8721363a2d3860f337ad53Marc Dietrich 5330cab4cb8526d7367c912c9a871d3ad1a9ac1fbf0Julian Andres Klode status = readl(nvec->base + I2C_SL_STATUS); 53432890b983086136fef8721363a2d3860f337ad53Marc Dietrich 5350cab4cb8526d7367c912c9a871d3ad1a9ac1fbf0Julian Andres Klode /* Filter out some errors */ 5360cab4cb8526d7367c912c9a871d3ad1a9ac1fbf0Julian Andres Klode if ((status & irq_mask) == 0 && (status & ~irq_mask) != 0) { 5370cab4cb8526d7367c912c9a871d3ad1a9ac1fbf0Julian Andres Klode dev_err(nvec->dev, "unexpected irq mask %lx\n", status); 5380cab4cb8526d7367c912c9a871d3ad1a9ac1fbf0Julian Andres Klode return IRQ_HANDLED; 53932890b983086136fef8721363a2d3860f337ad53Marc Dietrich } 5400cab4cb8526d7367c912c9a871d3ad1a9ac1fbf0Julian Andres Klode if ((status & I2C_SL_IRQ) == 0) { 5410cab4cb8526d7367c912c9a871d3ad1a9ac1fbf0Julian Andres Klode dev_err(nvec->dev, "Spurious IRQ\n"); 54232890b983086136fef8721363a2d3860f337ad53Marc Dietrich return IRQ_HANDLED; 5430cab4cb8526d7367c912c9a871d3ad1a9ac1fbf0Julian Andres Klode } 54432890b983086136fef8721363a2d3860f337ad53Marc Dietrich 5450cab4cb8526d7367c912c9a871d3ad1a9ac1fbf0Julian Andres Klode /* The EC did not request a read, so it send us something, read it */ 5460cab4cb8526d7367c912c9a871d3ad1a9ac1fbf0Julian Andres Klode if ((status & RNW) == 0) { 5470cab4cb8526d7367c912c9a871d3ad1a9ac1fbf0Julian Andres Klode received = readl(nvec->base + I2C_SL_RCVD); 548162c7d8c4be2d599583c42c2a8fe99bed6d87f67Marc Dietrich if (status & RCVD) 5490cab4cb8526d7367c912c9a871d3ad1a9ac1fbf0Julian Andres Klode writel(0, nvec->base + I2C_SL_RCVD); 5500cab4cb8526d7367c912c9a871d3ad1a9ac1fbf0Julian Andres Klode } 551162c7d8c4be2d599583c42c2a8fe99bed6d87f67Marc Dietrich 5520cab4cb8526d7367c912c9a871d3ad1a9ac1fbf0Julian Andres Klode if (status == (I2C_SL_IRQ | RCVD)) 5530cab4cb8526d7367c912c9a871d3ad1a9ac1fbf0Julian Andres Klode nvec->state = 0; 5540cab4cb8526d7367c912c9a871d3ad1a9ac1fbf0Julian Andres Klode 5550cab4cb8526d7367c912c9a871d3ad1a9ac1fbf0Julian Andres Klode switch (nvec->state) { 5560cab4cb8526d7367c912c9a871d3ad1a9ac1fbf0Julian Andres Klode case 0: /* Verify that its a transfer start, the rest later */ 5570cab4cb8526d7367c912c9a871d3ad1a9ac1fbf0Julian Andres Klode if (status != (I2C_SL_IRQ | RCVD)) 5580cab4cb8526d7367c912c9a871d3ad1a9ac1fbf0Julian Andres Klode nvec_invalid_flags(nvec, status, false); 5590cab4cb8526d7367c912c9a871d3ad1a9ac1fbf0Julian Andres Klode break; 5600cab4cb8526d7367c912c9a871d3ad1a9ac1fbf0Julian Andres Klode case 1: /* command byte */ 5610cab4cb8526d7367c912c9a871d3ad1a9ac1fbf0Julian Andres Klode if (status != I2C_SL_IRQ) { 5620cab4cb8526d7367c912c9a871d3ad1a9ac1fbf0Julian Andres Klode nvec_invalid_flags(nvec, status, true); 56332890b983086136fef8721363a2d3860f337ad53Marc Dietrich } else { 564bb0590e2723eed53b524d61cf011d53fc7280949Julian Andres Klode nvec->rx = nvec_msg_alloc(nvec, NVEC_MSG_RX); 5658da798634343de8dbb8c1593923f8368db69f838Julian Andres Klode /* Should not happen in a normal world */ 5668da798634343de8dbb8c1593923f8368db69f838Julian Andres Klode if (unlikely(nvec->rx == NULL)) { 5678da798634343de8dbb8c1593923f8368db69f838Julian Andres Klode nvec->state = 0; 5688da798634343de8dbb8c1593923f8368db69f838Julian Andres Klode break; 5698da798634343de8dbb8c1593923f8368db69f838Julian Andres Klode } 5700cab4cb8526d7367c912c9a871d3ad1a9ac1fbf0Julian Andres Klode nvec->rx->data[0] = received; 5710cab4cb8526d7367c912c9a871d3ad1a9ac1fbf0Julian Andres Klode nvec->rx->pos = 1; 5720cab4cb8526d7367c912c9a871d3ad1a9ac1fbf0Julian Andres Klode nvec->state = 2; 5730cab4cb8526d7367c912c9a871d3ad1a9ac1fbf0Julian Andres Klode } 5740cab4cb8526d7367c912c9a871d3ad1a9ac1fbf0Julian Andres Klode break; 5750cab4cb8526d7367c912c9a871d3ad1a9ac1fbf0Julian Andres Klode case 2: /* first byte after command */ 5760cab4cb8526d7367c912c9a871d3ad1a9ac1fbf0Julian Andres Klode if (status == (I2C_SL_IRQ | RNW | RCVD)) { 5770cab4cb8526d7367c912c9a871d3ad1a9ac1fbf0Julian Andres Klode udelay(33); 5780cab4cb8526d7367c912c9a871d3ad1a9ac1fbf0Julian Andres Klode if (nvec->rx->data[0] != 0x01) { 5790cab4cb8526d7367c912c9a871d3ad1a9ac1fbf0Julian Andres Klode dev_err(nvec->dev, 5800cab4cb8526d7367c912c9a871d3ad1a9ac1fbf0Julian Andres Klode "Read without prior read command\n"); 5810cab4cb8526d7367c912c9a871d3ad1a9ac1fbf0Julian Andres Klode nvec->state = 0; 5820cab4cb8526d7367c912c9a871d3ad1a9ac1fbf0Julian Andres Klode break; 58332890b983086136fef8721363a2d3860f337ad53Marc Dietrich } 5840cab4cb8526d7367c912c9a871d3ad1a9ac1fbf0Julian Andres Klode nvec_msg_free(nvec, nvec->rx); 5850cab4cb8526d7367c912c9a871d3ad1a9ac1fbf0Julian Andres Klode nvec->state = 3; 5860cab4cb8526d7367c912c9a871d3ad1a9ac1fbf0Julian Andres Klode nvec_tx_set(nvec); 5870cab4cb8526d7367c912c9a871d3ad1a9ac1fbf0Julian Andres Klode BUG_ON(nvec->tx->size < 1); 5880cab4cb8526d7367c912c9a871d3ad1a9ac1fbf0Julian Andres Klode to_send = nvec->tx->data[0]; 5890cab4cb8526d7367c912c9a871d3ad1a9ac1fbf0Julian Andres Klode nvec->tx->pos = 1; 5900cab4cb8526d7367c912c9a871d3ad1a9ac1fbf0Julian Andres Klode } else if (status == (I2C_SL_IRQ)) { 5910cab4cb8526d7367c912c9a871d3ad1a9ac1fbf0Julian Andres Klode BUG_ON(nvec->rx == NULL); 5920cab4cb8526d7367c912c9a871d3ad1a9ac1fbf0Julian Andres Klode nvec->rx->data[1] = received; 5930cab4cb8526d7367c912c9a871d3ad1a9ac1fbf0Julian Andres Klode nvec->rx->pos = 2; 5940cab4cb8526d7367c912c9a871d3ad1a9ac1fbf0Julian Andres Klode nvec->state = 4; 5950cab4cb8526d7367c912c9a871d3ad1a9ac1fbf0Julian Andres Klode } else { 5960cab4cb8526d7367c912c9a871d3ad1a9ac1fbf0Julian Andres Klode nvec_invalid_flags(nvec, status, true); 59732890b983086136fef8721363a2d3860f337ad53Marc Dietrich } 5980cab4cb8526d7367c912c9a871d3ad1a9ac1fbf0Julian Andres Klode break; 5990cab4cb8526d7367c912c9a871d3ad1a9ac1fbf0Julian Andres Klode case 3: /* EC does a block read, we transmit data */ 6000cab4cb8526d7367c912c9a871d3ad1a9ac1fbf0Julian Andres Klode if (status & END_TRANS) { 6010cab4cb8526d7367c912c9a871d3ad1a9ac1fbf0Julian Andres Klode nvec_tx_completed(nvec); 6020cab4cb8526d7367c912c9a871d3ad1a9ac1fbf0Julian Andres Klode } else if ((status & RNW) == 0 || (status & RCVD)) { 6030cab4cb8526d7367c912c9a871d3ad1a9ac1fbf0Julian Andres Klode nvec_invalid_flags(nvec, status, true); 6040cab4cb8526d7367c912c9a871d3ad1a9ac1fbf0Julian Andres Klode } else if (nvec->tx && nvec->tx->pos < nvec->tx->size) { 6050cab4cb8526d7367c912c9a871d3ad1a9ac1fbf0Julian Andres Klode to_send = nvec->tx->data[nvec->tx->pos++]; 6060cab4cb8526d7367c912c9a871d3ad1a9ac1fbf0Julian Andres Klode } else { 6070cab4cb8526d7367c912c9a871d3ad1a9ac1fbf0Julian Andres Klode dev_err(nvec->dev, "tx buffer underflow on %p (%u > %u)\n", 6080cab4cb8526d7367c912c9a871d3ad1a9ac1fbf0Julian Andres Klode nvec->tx, 6090cab4cb8526d7367c912c9a871d3ad1a9ac1fbf0Julian Andres Klode (uint) (nvec->tx ? nvec->tx->pos : 0), 6100cab4cb8526d7367c912c9a871d3ad1a9ac1fbf0Julian Andres Klode (uint) (nvec->tx ? nvec->tx->size : 0)); 6110cab4cb8526d7367c912c9a871d3ad1a9ac1fbf0Julian Andres Klode nvec->state = 0; 61232890b983086136fef8721363a2d3860f337ad53Marc Dietrich } 6130cab4cb8526d7367c912c9a871d3ad1a9ac1fbf0Julian Andres Klode break; 6140cab4cb8526d7367c912c9a871d3ad1a9ac1fbf0Julian Andres Klode case 4: /* EC does some write, we read the data */ 6150cab4cb8526d7367c912c9a871d3ad1a9ac1fbf0Julian Andres Klode if ((status & (END_TRANS | RNW)) == END_TRANS) 6160cab4cb8526d7367c912c9a871d3ad1a9ac1fbf0Julian Andres Klode nvec_rx_completed(nvec); 6170cab4cb8526d7367c912c9a871d3ad1a9ac1fbf0Julian Andres Klode else if (status & (RNW | RCVD)) 6180cab4cb8526d7367c912c9a871d3ad1a9ac1fbf0Julian Andres Klode nvec_invalid_flags(nvec, status, true); 6190cab4cb8526d7367c912c9a871d3ad1a9ac1fbf0Julian Andres Klode else if (nvec->rx && nvec->rx->pos < NVEC_MSG_SIZE) 6200cab4cb8526d7367c912c9a871d3ad1a9ac1fbf0Julian Andres Klode nvec->rx->data[nvec->rx->pos++] = received; 6210cab4cb8526d7367c912c9a871d3ad1a9ac1fbf0Julian Andres Klode else 6220cab4cb8526d7367c912c9a871d3ad1a9ac1fbf0Julian Andres Klode dev_err(nvec->dev, 6230cab4cb8526d7367c912c9a871d3ad1a9ac1fbf0Julian Andres Klode "RX buffer overflow on %p: " 6240cab4cb8526d7367c912c9a871d3ad1a9ac1fbf0Julian Andres Klode "Trying to write byte %u of %u\n", 6250cab4cb8526d7367c912c9a871d3ad1a9ac1fbf0Julian Andres Klode nvec->rx, nvec->rx->pos, NVEC_MSG_SIZE); 6260cab4cb8526d7367c912c9a871d3ad1a9ac1fbf0Julian Andres Klode break; 6270cab4cb8526d7367c912c9a871d3ad1a9ac1fbf0Julian Andres Klode default: 6280cab4cb8526d7367c912c9a871d3ad1a9ac1fbf0Julian Andres Klode nvec->state = 0; 6290cab4cb8526d7367c912c9a871d3ad1a9ac1fbf0Julian Andres Klode } 63032890b983086136fef8721363a2d3860f337ad53Marc Dietrich 6310cab4cb8526d7367c912c9a871d3ad1a9ac1fbf0Julian Andres Klode /* If we are told that a new transfer starts, verify it */ 6320cab4cb8526d7367c912c9a871d3ad1a9ac1fbf0Julian Andres Klode if ((status & (RCVD | RNW)) == RCVD) { 6330cab4cb8526d7367c912c9a871d3ad1a9ac1fbf0Julian Andres Klode if (received != nvec->i2c_addr) 6340cab4cb8526d7367c912c9a871d3ad1a9ac1fbf0Julian Andres Klode dev_err(nvec->dev, 6350cab4cb8526d7367c912c9a871d3ad1a9ac1fbf0Julian Andres Klode "received address 0x%02x, expected 0x%02x\n", 6360cab4cb8526d7367c912c9a871d3ad1a9ac1fbf0Julian Andres Klode received, nvec->i2c_addr); 6370cab4cb8526d7367c912c9a871d3ad1a9ac1fbf0Julian Andres Klode nvec->state = 1; 63832890b983086136fef8721363a2d3860f337ad53Marc Dietrich } 6390cab4cb8526d7367c912c9a871d3ad1a9ac1fbf0Julian Andres Klode 6400cab4cb8526d7367c912c9a871d3ad1a9ac1fbf0Julian Andres Klode /* Send data if requested, but not on end of transmission */ 6410cab4cb8526d7367c912c9a871d3ad1a9ac1fbf0Julian Andres Klode if ((status & (RNW | END_TRANS)) == RNW) 6420cab4cb8526d7367c912c9a871d3ad1a9ac1fbf0Julian Andres Klode writel(to_send, nvec->base + I2C_SL_RCVD); 6430cab4cb8526d7367c912c9a871d3ad1a9ac1fbf0Julian Andres Klode 6440cab4cb8526d7367c912c9a871d3ad1a9ac1fbf0Julian Andres Klode /* If we have send the first byte */ 6450cab4cb8526d7367c912c9a871d3ad1a9ac1fbf0Julian Andres Klode if (status == (I2C_SL_IRQ | RNW | RCVD)) 6460cab4cb8526d7367c912c9a871d3ad1a9ac1fbf0Julian Andres Klode nvec_gpio_set_value(nvec, 1); 6470cab4cb8526d7367c912c9a871d3ad1a9ac1fbf0Julian Andres Klode 6480cab4cb8526d7367c912c9a871d3ad1a9ac1fbf0Julian Andres Klode dev_dbg(nvec->dev, 6490cab4cb8526d7367c912c9a871d3ad1a9ac1fbf0Julian Andres Klode "Handled: %s 0x%02x, %s 0x%02x in state %u [%s%s%s]\n", 6500cab4cb8526d7367c912c9a871d3ad1a9ac1fbf0Julian Andres Klode (status & RNW) == 0 ? "received" : "R=", 6510cab4cb8526d7367c912c9a871d3ad1a9ac1fbf0Julian Andres Klode received, 6520cab4cb8526d7367c912c9a871d3ad1a9ac1fbf0Julian Andres Klode (status & (RNW | END_TRANS)) ? "sent" : "S=", 6530cab4cb8526d7367c912c9a871d3ad1a9ac1fbf0Julian Andres Klode to_send, 6540cab4cb8526d7367c912c9a871d3ad1a9ac1fbf0Julian Andres Klode state, 6550cab4cb8526d7367c912c9a871d3ad1a9ac1fbf0Julian Andres Klode status & END_TRANS ? " END_TRANS" : "", 6560cab4cb8526d7367c912c9a871d3ad1a9ac1fbf0Julian Andres Klode status & RCVD ? " RCVD" : "", 6570cab4cb8526d7367c912c9a871d3ad1a9ac1fbf0Julian Andres Klode status & RNW ? " RNW" : ""); 6580cab4cb8526d7367c912c9a871d3ad1a9ac1fbf0Julian Andres Klode 659de839b8f06bc5dd3f5037c4409a720cbb9bf21c3Julian Andres Klode 660de839b8f06bc5dd3f5037c4409a720cbb9bf21c3Julian Andres Klode /* 661de839b8f06bc5dd3f5037c4409a720cbb9bf21c3Julian Andres Klode * TODO: A correct fix needs to be found for this. 662de839b8f06bc5dd3f5037c4409a720cbb9bf21c3Julian Andres Klode * 663de839b8f06bc5dd3f5037c4409a720cbb9bf21c3Julian Andres Klode * We experience less incomplete messages with this delay than without 664de839b8f06bc5dd3f5037c4409a720cbb9bf21c3Julian Andres Klode * it, but we don't know why. Help is appreciated. 665de839b8f06bc5dd3f5037c4409a720cbb9bf21c3Julian Andres Klode */ 666de839b8f06bc5dd3f5037c4409a720cbb9bf21c3Julian Andres Klode udelay(100); 667de839b8f06bc5dd3f5037c4409a720cbb9bf21c3Julian Andres Klode 66832890b983086136fef8721363a2d3860f337ad53Marc Dietrich return IRQ_HANDLED; 66932890b983086136fef8721363a2d3860f337ad53Marc Dietrich} 67032890b983086136fef8721363a2d3860f337ad53Marc Dietrich 671f686e9affba24cfdf94fb155aaeb36a1e14719f1Marc Dietrichstatic void tegra_init_i2c_slave(struct nvec_chip *nvec) 67232890b983086136fef8721363a2d3860f337ad53Marc Dietrich{ 67332890b983086136fef8721363a2d3860f337ad53Marc Dietrich u32 val; 67432890b983086136fef8721363a2d3860f337ad53Marc Dietrich 675f686e9affba24cfdf94fb155aaeb36a1e14719f1Marc Dietrich clk_enable(nvec->i2c_clk); 676f686e9affba24cfdf94fb155aaeb36a1e14719f1Marc Dietrich 677f686e9affba24cfdf94fb155aaeb36a1e14719f1Marc Dietrich tegra_periph_reset_assert(nvec->i2c_clk); 67832890b983086136fef8721363a2d3860f337ad53Marc Dietrich udelay(2); 679f686e9affba24cfdf94fb155aaeb36a1e14719f1Marc Dietrich tegra_periph_reset_deassert(nvec->i2c_clk); 68032890b983086136fef8721363a2d3860f337ad53Marc Dietrich 68132890b983086136fef8721363a2d3860f337ad53Marc Dietrich val = I2C_CNFG_NEW_MASTER_SFM | I2C_CNFG_PACKET_MODE_EN | 682ac8107599e47b0f4638f4f3fb0141bbcf0cb142bMarc Dietrich (0x2 << I2C_CNFG_DEBOUNCE_CNT_SHIFT); 683f686e9affba24cfdf94fb155aaeb36a1e14719f1Marc Dietrich writel(val, nvec->base + I2C_CNFG); 684ac8107599e47b0f4638f4f3fb0141bbcf0cb142bMarc Dietrich 685ac8107599e47b0f4638f4f3fb0141bbcf0cb142bMarc Dietrich clk_set_rate(nvec->i2c_clk, 8 * 80000); 686ac8107599e47b0f4638f4f3fb0141bbcf0cb142bMarc Dietrich 687f686e9affba24cfdf94fb155aaeb36a1e14719f1Marc Dietrich writel(I2C_SL_NEWL, nvec->base + I2C_SL_CNFG); 688ac8107599e47b0f4638f4f3fb0141bbcf0cb142bMarc Dietrich writel(0x1E, nvec->base + I2C_SL_DELAY_COUNT); 689ac8107599e47b0f4638f4f3fb0141bbcf0cb142bMarc Dietrich 690ac8107599e47b0f4638f4f3fb0141bbcf0cb142bMarc Dietrich writel(nvec->i2c_addr>>1, nvec->base + I2C_SL_ADDR1); 691ac8107599e47b0f4638f4f3fb0141bbcf0cb142bMarc Dietrich writel(0, nvec->base + I2C_SL_ADDR2); 69232890b983086136fef8721363a2d3860f337ad53Marc Dietrich 693ac8107599e47b0f4638f4f3fb0141bbcf0cb142bMarc Dietrich enable_irq(nvec->irq); 694ac8107599e47b0f4638f4f3fb0141bbcf0cb142bMarc Dietrich 695ac8107599e47b0f4638f4f3fb0141bbcf0cb142bMarc Dietrich clk_disable(nvec->i2c_clk); 696ac8107599e47b0f4638f4f3fb0141bbcf0cb142bMarc Dietrich} 697ac8107599e47b0f4638f4f3fb0141bbcf0cb142bMarc Dietrich 698ac8107599e47b0f4638f4f3fb0141bbcf0cb142bMarc Dietrichstatic void nvec_disable_i2c_slave(struct nvec_chip *nvec) 699ac8107599e47b0f4638f4f3fb0141bbcf0cb142bMarc Dietrich{ 700ac8107599e47b0f4638f4f3fb0141bbcf0cb142bMarc Dietrich disable_irq(nvec->irq); 701ac8107599e47b0f4638f4f3fb0141bbcf0cb142bMarc Dietrich writel(I2C_SL_NEWL | I2C_SL_NACK, nvec->base + I2C_SL_CNFG); 702f686e9affba24cfdf94fb155aaeb36a1e14719f1Marc Dietrich clk_disable(nvec->i2c_clk); 70332890b983086136fef8721363a2d3860f337ad53Marc Dietrich} 70432890b983086136fef8721363a2d3860f337ad53Marc Dietrich 70532890b983086136fef8721363a2d3860f337ad53Marc Dietrichstatic void nvec_power_off(void) 70632890b983086136fef8721363a2d3860f337ad53Marc Dietrich{ 70732890b983086136fef8721363a2d3860f337ad53Marc Dietrich nvec_write_async(nvec_power_handle, EC_DISABLE_EVENT_REPORTING, 3); 70832890b983086136fef8721363a2d3860f337ad53Marc Dietrich nvec_write_async(nvec_power_handle, "\x04\x01", 2); 70932890b983086136fef8721363a2d3860f337ad53Marc Dietrich} 71032890b983086136fef8721363a2d3860f337ad53Marc Dietrich 71132890b983086136fef8721363a2d3860f337ad53Marc Dietrichstatic int __devinit tegra_nvec_probe(struct platform_device *pdev) 71232890b983086136fef8721363a2d3860f337ad53Marc Dietrich{ 713f686e9affba24cfdf94fb155aaeb36a1e14719f1Marc Dietrich int err, ret; 71432890b983086136fef8721363a2d3860f337ad53Marc Dietrich struct clk *i2c_clk; 71532890b983086136fef8721363a2d3860f337ad53Marc Dietrich struct nvec_platform_data *pdata = pdev->dev.platform_data; 71632890b983086136fef8721363a2d3860f337ad53Marc Dietrich struct nvec_chip *nvec; 71732890b983086136fef8721363a2d3860f337ad53Marc Dietrich struct nvec_msg *msg; 718f686e9affba24cfdf94fb155aaeb36a1e14719f1Marc Dietrich struct resource *res; 719f686e9affba24cfdf94fb155aaeb36a1e14719f1Marc Dietrich struct resource *iomem; 720f686e9affba24cfdf94fb155aaeb36a1e14719f1Marc Dietrich void __iomem *base; 72132890b983086136fef8721363a2d3860f337ad53Marc Dietrich 72232890b983086136fef8721363a2d3860f337ad53Marc Dietrich nvec = kzalloc(sizeof(struct nvec_chip), GFP_KERNEL); 723162c7d8c4be2d599583c42c2a8fe99bed6d87f67Marc Dietrich if (nvec == NULL) { 72432890b983086136fef8721363a2d3860f337ad53Marc Dietrich dev_err(&pdev->dev, "failed to reserve memory\n"); 72532890b983086136fef8721363a2d3860f337ad53Marc Dietrich return -ENOMEM; 72632890b983086136fef8721363a2d3860f337ad53Marc Dietrich } 72732890b983086136fef8721363a2d3860f337ad53Marc Dietrich platform_set_drvdata(pdev, nvec); 72832890b983086136fef8721363a2d3860f337ad53Marc Dietrich nvec->dev = &pdev->dev; 72932890b983086136fef8721363a2d3860f337ad53Marc Dietrich nvec->gpio = pdata->gpio; 730f686e9affba24cfdf94fb155aaeb36a1e14719f1Marc Dietrich nvec->i2c_addr = pdata->i2c_addr; 731f686e9affba24cfdf94fb155aaeb36a1e14719f1Marc Dietrich 732f686e9affba24cfdf94fb155aaeb36a1e14719f1Marc Dietrich res = platform_get_resource(pdev, IORESOURCE_MEM, 0); 733f686e9affba24cfdf94fb155aaeb36a1e14719f1Marc Dietrich if (!res) { 734f686e9affba24cfdf94fb155aaeb36a1e14719f1Marc Dietrich dev_err(&pdev->dev, "no mem resource?\n"); 735f686e9affba24cfdf94fb155aaeb36a1e14719f1Marc Dietrich return -ENODEV; 73632890b983086136fef8721363a2d3860f337ad53Marc Dietrich } 73732890b983086136fef8721363a2d3860f337ad53Marc Dietrich 738f686e9affba24cfdf94fb155aaeb36a1e14719f1Marc Dietrich iomem = request_mem_region(res->start, resource_size(res), pdev->name); 739f686e9affba24cfdf94fb155aaeb36a1e14719f1Marc Dietrich if (!iomem) { 740f686e9affba24cfdf94fb155aaeb36a1e14719f1Marc Dietrich dev_err(&pdev->dev, "I2C region already claimed\n"); 741f686e9affba24cfdf94fb155aaeb36a1e14719f1Marc Dietrich return -EBUSY; 742f686e9affba24cfdf94fb155aaeb36a1e14719f1Marc Dietrich } 74332890b983086136fef8721363a2d3860f337ad53Marc Dietrich 744f686e9affba24cfdf94fb155aaeb36a1e14719f1Marc Dietrich base = ioremap(iomem->start, resource_size(iomem)); 745f686e9affba24cfdf94fb155aaeb36a1e14719f1Marc Dietrich if (!base) { 746f686e9affba24cfdf94fb155aaeb36a1e14719f1Marc Dietrich dev_err(&pdev->dev, "Can't ioremap I2C region\n"); 747f686e9affba24cfdf94fb155aaeb36a1e14719f1Marc Dietrich return -ENOMEM; 74832890b983086136fef8721363a2d3860f337ad53Marc Dietrich } 74932890b983086136fef8721363a2d3860f337ad53Marc Dietrich 750f686e9affba24cfdf94fb155aaeb36a1e14719f1Marc Dietrich res = platform_get_resource(pdev, IORESOURCE_IRQ, 0); 751f686e9affba24cfdf94fb155aaeb36a1e14719f1Marc Dietrich if (!res) { 752f686e9affba24cfdf94fb155aaeb36a1e14719f1Marc Dietrich dev_err(&pdev->dev, "no irq resource?\n"); 753f686e9affba24cfdf94fb155aaeb36a1e14719f1Marc Dietrich ret = -ENODEV; 754f686e9affba24cfdf94fb155aaeb36a1e14719f1Marc Dietrich goto err_iounmap; 755f686e9affba24cfdf94fb155aaeb36a1e14719f1Marc Dietrich } 75632890b983086136fef8721363a2d3860f337ad53Marc Dietrich 757f686e9affba24cfdf94fb155aaeb36a1e14719f1Marc Dietrich i2c_clk = clk_get_sys("tegra-i2c.2", NULL); 758f686e9affba24cfdf94fb155aaeb36a1e14719f1Marc Dietrich if (IS_ERR(i2c_clk)) { 759f686e9affba24cfdf94fb155aaeb36a1e14719f1Marc Dietrich dev_err(nvec->dev, "failed to get controller clock\n"); 760f686e9affba24cfdf94fb155aaeb36a1e14719f1Marc Dietrich goto err_iounmap; 76132890b983086136fef8721363a2d3860f337ad53Marc Dietrich } 76232890b983086136fef8721363a2d3860f337ad53Marc Dietrich 763f686e9affba24cfdf94fb155aaeb36a1e14719f1Marc Dietrich nvec->base = base; 764f686e9affba24cfdf94fb155aaeb36a1e14719f1Marc Dietrich nvec->irq = res->start; 765f686e9affba24cfdf94fb155aaeb36a1e14719f1Marc Dietrich nvec->i2c_clk = i2c_clk; 7660cab4cb8526d7367c912c9a871d3ad1a9ac1fbf0Julian Andres Klode nvec->rx = &nvec->msg_pool[0]; 767f686e9affba24cfdf94fb155aaeb36a1e14719f1Marc Dietrich 76832890b983086136fef8721363a2d3860f337ad53Marc Dietrich /* Set the gpio to low when we've got something to say */ 76932890b983086136fef8721363a2d3860f337ad53Marc Dietrich err = gpio_request(nvec->gpio, "nvec gpio"); 770162c7d8c4be2d599583c42c2a8fe99bed6d87f67Marc Dietrich if (err < 0) 77132890b983086136fef8721363a2d3860f337ad53Marc Dietrich dev_err(nvec->dev, "couldn't request gpio\n"); 77232890b983086136fef8721363a2d3860f337ad53Marc Dietrich 77332890b983086136fef8721363a2d3860f337ad53Marc Dietrich ATOMIC_INIT_NOTIFIER_HEAD(&nvec->notifier_list); 77432890b983086136fef8721363a2d3860f337ad53Marc Dietrich 77532890b983086136fef8721363a2d3860f337ad53Marc Dietrich init_completion(&nvec->sync_write); 7760cab4cb8526d7367c912c9a871d3ad1a9ac1fbf0Julian Andres Klode init_completion(&nvec->ec_transfer); 7770cab4cb8526d7367c912c9a871d3ad1a9ac1fbf0Julian Andres Klode mutex_init(&nvec->sync_write_mutex); 7780cab4cb8526d7367c912c9a871d3ad1a9ac1fbf0Julian Andres Klode spin_lock_init(&nvec->tx_lock); 7790cab4cb8526d7367c912c9a871d3ad1a9ac1fbf0Julian Andres Klode spin_lock_init(&nvec->rx_lock); 78032890b983086136fef8721363a2d3860f337ad53Marc Dietrich INIT_LIST_HEAD(&nvec->rx_data); 7810cab4cb8526d7367c912c9a871d3ad1a9ac1fbf0Julian Andres Klode INIT_LIST_HEAD(&nvec->tx_data); 78232890b983086136fef8721363a2d3860f337ad53Marc Dietrich INIT_WORK(&nvec->rx_work, nvec_dispatch); 78332890b983086136fef8721363a2d3860f337ad53Marc Dietrich INIT_WORK(&nvec->tx_work, nvec_request_master); 7840cab4cb8526d7367c912c9a871d3ad1a9ac1fbf0Julian Andres Klode nvec->wq = alloc_workqueue("nvec", WQ_NON_REENTRANT, 2); 78532890b983086136fef8721363a2d3860f337ad53Marc Dietrich 786f686e9affba24cfdf94fb155aaeb36a1e14719f1Marc Dietrich err = request_irq(nvec->irq, nvec_interrupt, 0, "nvec", nvec); 787f686e9affba24cfdf94fb155aaeb36a1e14719f1Marc Dietrich if (err) { 788f686e9affba24cfdf94fb155aaeb36a1e14719f1Marc Dietrich dev_err(nvec->dev, "couldn't request irq\n"); 789f686e9affba24cfdf94fb155aaeb36a1e14719f1Marc Dietrich goto failed; 790f686e9affba24cfdf94fb155aaeb36a1e14719f1Marc Dietrich } 791ac8107599e47b0f4638f4f3fb0141bbcf0cb142bMarc Dietrich disable_irq(nvec->irq); 792f686e9affba24cfdf94fb155aaeb36a1e14719f1Marc Dietrich 793f686e9affba24cfdf94fb155aaeb36a1e14719f1Marc Dietrich tegra_init_i2c_slave(nvec); 794f686e9affba24cfdf94fb155aaeb36a1e14719f1Marc Dietrich 795ac8107599e47b0f4638f4f3fb0141bbcf0cb142bMarc Dietrich clk_enable(i2c_clk); 796ac8107599e47b0f4638f4f3fb0141bbcf0cb142bMarc Dietrich 797f686e9affba24cfdf94fb155aaeb36a1e14719f1Marc Dietrich gpio_direction_output(nvec->gpio, 1); 798f686e9affba24cfdf94fb155aaeb36a1e14719f1Marc Dietrich gpio_set_value(nvec->gpio, 1); 799f686e9affba24cfdf94fb155aaeb36a1e14719f1Marc Dietrich 80032890b983086136fef8721363a2d3860f337ad53Marc Dietrich /* enable event reporting */ 80132890b983086136fef8721363a2d3860f337ad53Marc Dietrich nvec_write_async(nvec, EC_ENABLE_EVENT_REPORTING, 802162c7d8c4be2d599583c42c2a8fe99bed6d87f67Marc Dietrich sizeof(EC_ENABLE_EVENT_REPORTING)); 80332890b983086136fef8721363a2d3860f337ad53Marc Dietrich 80432890b983086136fef8721363a2d3860f337ad53Marc Dietrich nvec->nvec_status_notifier.notifier_call = nvec_status_notifier; 80532890b983086136fef8721363a2d3860f337ad53Marc Dietrich nvec_register_notifier(nvec, &nvec->nvec_status_notifier, 0); 80632890b983086136fef8721363a2d3860f337ad53Marc Dietrich 80732890b983086136fef8721363a2d3860f337ad53Marc Dietrich nvec_power_handle = nvec; 80832890b983086136fef8721363a2d3860f337ad53Marc Dietrich pm_power_off = nvec_power_off; 80932890b983086136fef8721363a2d3860f337ad53Marc Dietrich 81032890b983086136fef8721363a2d3860f337ad53Marc Dietrich /* Get Firmware Version */ 81132890b983086136fef8721363a2d3860f337ad53Marc Dietrich msg = nvec_write_sync(nvec, EC_GET_FIRMWARE_VERSION, 8120cab4cb8526d7367c912c9a871d3ad1a9ac1fbf0Julian Andres Klode sizeof(EC_GET_FIRMWARE_VERSION)); 81332890b983086136fef8721363a2d3860f337ad53Marc Dietrich 8140cab4cb8526d7367c912c9a871d3ad1a9ac1fbf0Julian Andres Klode if (msg) { 8150cab4cb8526d7367c912c9a871d3ad1a9ac1fbf0Julian Andres Klode dev_warn(nvec->dev, "ec firmware version %02x.%02x.%02x / %02x\n", 8160cab4cb8526d7367c912c9a871d3ad1a9ac1fbf0Julian Andres Klode msg->data[4], msg->data[5], msg->data[6], msg->data[7]); 81732890b983086136fef8721363a2d3860f337ad53Marc Dietrich 8180cab4cb8526d7367c912c9a871d3ad1a9ac1fbf0Julian Andres Klode nvec_msg_free(nvec, msg); 8190cab4cb8526d7367c912c9a871d3ad1a9ac1fbf0Julian Andres Klode } 82032890b983086136fef8721363a2d3860f337ad53Marc Dietrich 821f686e9affba24cfdf94fb155aaeb36a1e14719f1Marc Dietrich ret = mfd_add_devices(nvec->dev, -1, nvec_devices, 822162c7d8c4be2d599583c42c2a8fe99bed6d87f67Marc Dietrich ARRAY_SIZE(nvec_devices), base, 0); 823162c7d8c4be2d599583c42c2a8fe99bed6d87f67Marc Dietrich if (ret) 824f686e9affba24cfdf94fb155aaeb36a1e14719f1Marc Dietrich dev_err(nvec->dev, "error adding subdevices\n"); 825f686e9affba24cfdf94fb155aaeb36a1e14719f1Marc Dietrich 82632890b983086136fef8721363a2d3860f337ad53Marc Dietrich /* unmute speakers? */ 8276dca320c8f16b464bb762494b509b2b02897054eMarc Dietrich nvec_write_async(nvec, "\x0d\x10\x59\x95", 4); 82832890b983086136fef8721363a2d3860f337ad53Marc Dietrich 82932890b983086136fef8721363a2d3860f337ad53Marc Dietrich /* enable lid switch event */ 83032890b983086136fef8721363a2d3860f337ad53Marc Dietrich nvec_write_async(nvec, "\x01\x01\x01\x00\x00\x02\x00", 7); 83132890b983086136fef8721363a2d3860f337ad53Marc Dietrich 83232890b983086136fef8721363a2d3860f337ad53Marc Dietrich /* enable power button event */ 83332890b983086136fef8721363a2d3860f337ad53Marc Dietrich nvec_write_async(nvec, "\x01\x01\x01\x00\x00\x80\x00", 7); 83432890b983086136fef8721363a2d3860f337ad53Marc Dietrich 83532890b983086136fef8721363a2d3860f337ad53Marc Dietrich return 0; 83632890b983086136fef8721363a2d3860f337ad53Marc Dietrich 837f686e9affba24cfdf94fb155aaeb36a1e14719f1Marc Dietricherr_iounmap: 838f686e9affba24cfdf94fb155aaeb36a1e14719f1Marc Dietrich iounmap(base); 83932890b983086136fef8721363a2d3860f337ad53Marc Dietrichfailed: 84032890b983086136fef8721363a2d3860f337ad53Marc Dietrich kfree(nvec); 84132890b983086136fef8721363a2d3860f337ad53Marc Dietrich return -ENOMEM; 84232890b983086136fef8721363a2d3860f337ad53Marc Dietrich} 84332890b983086136fef8721363a2d3860f337ad53Marc Dietrich 84432890b983086136fef8721363a2d3860f337ad53Marc Dietrichstatic int __devexit tegra_nvec_remove(struct platform_device *pdev) 84532890b983086136fef8721363a2d3860f337ad53Marc Dietrich{ 846f686e9affba24cfdf94fb155aaeb36a1e14719f1Marc Dietrich struct nvec_chip *nvec = platform_get_drvdata(pdev); 847f686e9affba24cfdf94fb155aaeb36a1e14719f1Marc Dietrich 848f686e9affba24cfdf94fb155aaeb36a1e14719f1Marc Dietrich nvec_write_async(nvec, EC_DISABLE_EVENT_REPORTING, 3); 849f686e9affba24cfdf94fb155aaeb36a1e14719f1Marc Dietrich mfd_remove_devices(nvec->dev); 850f686e9affba24cfdf94fb155aaeb36a1e14719f1Marc Dietrich free_irq(nvec->irq, &nvec_interrupt); 851f686e9affba24cfdf94fb155aaeb36a1e14719f1Marc Dietrich iounmap(nvec->base); 852f686e9affba24cfdf94fb155aaeb36a1e14719f1Marc Dietrich gpio_free(nvec->gpio); 8530cab4cb8526d7367c912c9a871d3ad1a9ac1fbf0Julian Andres Klode destroy_workqueue(nvec->wq); 854f686e9affba24cfdf94fb155aaeb36a1e14719f1Marc Dietrich kfree(nvec); 855f686e9affba24cfdf94fb155aaeb36a1e14719f1Marc Dietrich 85632890b983086136fef8721363a2d3860f337ad53Marc Dietrich return 0; 85732890b983086136fef8721363a2d3860f337ad53Marc Dietrich} 85832890b983086136fef8721363a2d3860f337ad53Marc Dietrich 85932890b983086136fef8721363a2d3860f337ad53Marc Dietrich#ifdef CONFIG_PM 86032890b983086136fef8721363a2d3860f337ad53Marc Dietrich 86132890b983086136fef8721363a2d3860f337ad53Marc Dietrichstatic int tegra_nvec_suspend(struct platform_device *pdev, pm_message_t state) 86232890b983086136fef8721363a2d3860f337ad53Marc Dietrich{ 86332890b983086136fef8721363a2d3860f337ad53Marc Dietrich struct nvec_chip *nvec = platform_get_drvdata(pdev); 86432890b983086136fef8721363a2d3860f337ad53Marc Dietrich 86532890b983086136fef8721363a2d3860f337ad53Marc Dietrich dev_dbg(nvec->dev, "suspending\n"); 86632890b983086136fef8721363a2d3860f337ad53Marc Dietrich nvec_write_async(nvec, EC_DISABLE_EVENT_REPORTING, 3); 86732890b983086136fef8721363a2d3860f337ad53Marc Dietrich nvec_write_async(nvec, "\x04\x02", 2); 868ac8107599e47b0f4638f4f3fb0141bbcf0cb142bMarc Dietrich nvec_disable_i2c_slave(nvec); 86932890b983086136fef8721363a2d3860f337ad53Marc Dietrich 87032890b983086136fef8721363a2d3860f337ad53Marc Dietrich return 0; 87132890b983086136fef8721363a2d3860f337ad53Marc Dietrich} 87232890b983086136fef8721363a2d3860f337ad53Marc Dietrich 873162c7d8c4be2d599583c42c2a8fe99bed6d87f67Marc Dietrichstatic int tegra_nvec_resume(struct platform_device *pdev) 874162c7d8c4be2d599583c42c2a8fe99bed6d87f67Marc Dietrich{ 87532890b983086136fef8721363a2d3860f337ad53Marc Dietrich struct nvec_chip *nvec = platform_get_drvdata(pdev); 87632890b983086136fef8721363a2d3860f337ad53Marc Dietrich 87732890b983086136fef8721363a2d3860f337ad53Marc Dietrich dev_dbg(nvec->dev, "resuming\n"); 878f686e9affba24cfdf94fb155aaeb36a1e14719f1Marc Dietrich tegra_init_i2c_slave(nvec); 87932890b983086136fef8721363a2d3860f337ad53Marc Dietrich nvec_write_async(nvec, EC_ENABLE_EVENT_REPORTING, 3); 88032890b983086136fef8721363a2d3860f337ad53Marc Dietrich 88132890b983086136fef8721363a2d3860f337ad53Marc Dietrich return 0; 88232890b983086136fef8721363a2d3860f337ad53Marc Dietrich} 88332890b983086136fef8721363a2d3860f337ad53Marc Dietrich 88432890b983086136fef8721363a2d3860f337ad53Marc Dietrich#else 88532890b983086136fef8721363a2d3860f337ad53Marc Dietrich#define tegra_nvec_suspend NULL 88632890b983086136fef8721363a2d3860f337ad53Marc Dietrich#define tegra_nvec_resume NULL 88732890b983086136fef8721363a2d3860f337ad53Marc Dietrich#endif 88832890b983086136fef8721363a2d3860f337ad53Marc Dietrich 889162c7d8c4be2d599583c42c2a8fe99bed6d87f67Marc Dietrichstatic struct platform_driver nvec_device_driver = { 890162c7d8c4be2d599583c42c2a8fe99bed6d87f67Marc Dietrich .probe = tegra_nvec_probe, 891162c7d8c4be2d599583c42c2a8fe99bed6d87f67Marc Dietrich .remove = __devexit_p(tegra_nvec_remove), 89232890b983086136fef8721363a2d3860f337ad53Marc Dietrich .suspend = tegra_nvec_suspend, 893162c7d8c4be2d599583c42c2a8fe99bed6d87f67Marc Dietrich .resume = tegra_nvec_resume, 894162c7d8c4be2d599583c42c2a8fe99bed6d87f67Marc Dietrich .driver = { 89532890b983086136fef8721363a2d3860f337ad53Marc Dietrich .name = "nvec", 89632890b983086136fef8721363a2d3860f337ad53Marc Dietrich .owner = THIS_MODULE, 89732890b983086136fef8721363a2d3860f337ad53Marc Dietrich } 89832890b983086136fef8721363a2d3860f337ad53Marc Dietrich}; 89932890b983086136fef8721363a2d3860f337ad53Marc Dietrich 90032890b983086136fef8721363a2d3860f337ad53Marc Dietrichstatic int __init tegra_nvec_init(void) 90132890b983086136fef8721363a2d3860f337ad53Marc Dietrich{ 90232890b983086136fef8721363a2d3860f337ad53Marc Dietrich return platform_driver_register(&nvec_device_driver); 90332890b983086136fef8721363a2d3860f337ad53Marc Dietrich} 90432890b983086136fef8721363a2d3860f337ad53Marc Dietrich 90532890b983086136fef8721363a2d3860f337ad53Marc Dietrichmodule_init(tegra_nvec_init); 906162c7d8c4be2d599583c42c2a8fe99bed6d87f67Marc Dietrich 90732890b983086136fef8721363a2d3860f337ad53Marc DietrichMODULE_ALIAS("platform:nvec"); 908162c7d8c4be2d599583c42c2a8fe99bed6d87f67Marc DietrichMODULE_DESCRIPTION("NVIDIA compliant embedded controller interface"); 909162c7d8c4be2d599583c42c2a8fe99bed6d87f67Marc DietrichMODULE_AUTHOR("Marc Dietrich <marvin24@gmx.de>"); 910162c7d8c4be2d599583c42c2a8fe99bed6d87f67Marc DietrichMODULE_LICENSE("GPL"); 911