132890b98SMarc Dietrich // #define DEBUG 232890b98SMarc Dietrich 332890b98SMarc Dietrich /* ToDo list (incomplete, unorderd) 432890b98SMarc Dietrich - convert mouse, keyboard, and power to platform devices 532890b98SMarc Dietrich */ 632890b98SMarc Dietrich 732890b98SMarc Dietrich #include <asm/io.h> 832890b98SMarc Dietrich #include <asm/irq.h> 932890b98SMarc Dietrich #include <linux/completion.h> 1032890b98SMarc Dietrich #include <linux/interrupt.h> 1132890b98SMarc Dietrich #include <linux/irq.h> 1232890b98SMarc Dietrich #include <linux/slab.h> 1332890b98SMarc Dietrich #include <linux/gpio.h> 1432890b98SMarc Dietrich #include <linux/serio.h> 1532890b98SMarc Dietrich #include <linux/delay.h> 1632890b98SMarc Dietrich #include <linux/input.h> 1732890b98SMarc Dietrich #include <linux/workqueue.h> 1832890b98SMarc Dietrich #include <linux/clk.h> 1932890b98SMarc Dietrich #include <mach/iomap.h> 2032890b98SMarc Dietrich #include <mach/clk.h> 2132890b98SMarc Dietrich #include <linux/semaphore.h> 2232890b98SMarc Dietrich #include <linux/list.h> 2332890b98SMarc Dietrich #include <linux/notifier.h> 2432890b98SMarc Dietrich #include <linux/platform_device.h> 25f686e9afSMarc Dietrich #include <linux/mfd/core.h> 2632890b98SMarc Dietrich #include "nvec.h" 2732890b98SMarc Dietrich 2832890b98SMarc Dietrich static unsigned char EC_DISABLE_EVENT_REPORTING[] = {'\x04','\x00','\x00'}; 2932890b98SMarc Dietrich static unsigned char EC_ENABLE_EVENT_REPORTING[] = {'\x04','\x00','\x01'}; 3032890b98SMarc Dietrich static unsigned char EC_GET_FIRMWARE_VERSION[] = {'\x07','\x15'}; 3132890b98SMarc Dietrich 3232890b98SMarc Dietrich static struct nvec_chip *nvec_power_handle; 3332890b98SMarc Dietrich 34f686e9afSMarc Dietrich static struct mfd_cell nvec_devices[] = { 35f686e9afSMarc Dietrich { 36f686e9afSMarc Dietrich .name = "nvec-kbd", 37f686e9afSMarc Dietrich .id = 1, 38f686e9afSMarc Dietrich }, 39f686e9afSMarc Dietrich { 40f686e9afSMarc Dietrich .name = "nvec-mouse", 41f686e9afSMarc Dietrich .id = 1, 42f686e9afSMarc Dietrich }, 43f686e9afSMarc Dietrich { 44f686e9afSMarc Dietrich .name = "nvec-power", 45f686e9afSMarc Dietrich .id = 1, 46f686e9afSMarc Dietrich }, 47f686e9afSMarc Dietrich { 48f686e9afSMarc Dietrich .name = "nvec-power", 49f686e9afSMarc Dietrich .id = 2, 50f686e9afSMarc Dietrich }, 51f686e9afSMarc Dietrich }; 52f686e9afSMarc Dietrich 5332890b98SMarc Dietrich int nvec_register_notifier(struct nvec_chip *nvec, struct notifier_block *nb, 5432890b98SMarc Dietrich unsigned int events) 5532890b98SMarc Dietrich { 5632890b98SMarc Dietrich return atomic_notifier_chain_register(&nvec->notifier_list, nb); 5732890b98SMarc Dietrich } 5832890b98SMarc Dietrich EXPORT_SYMBOL_GPL(nvec_register_notifier); 5932890b98SMarc Dietrich 6032890b98SMarc Dietrich static int nvec_status_notifier(struct notifier_block *nb, unsigned long event_type, 6132890b98SMarc Dietrich void *data) 6232890b98SMarc Dietrich { 6332890b98SMarc Dietrich unsigned char *msg = (unsigned char *)data; 6432890b98SMarc Dietrich int i; 6532890b98SMarc Dietrich 6632890b98SMarc Dietrich if(event_type != NVEC_CNTL) 6732890b98SMarc Dietrich return NOTIFY_DONE; 6832890b98SMarc Dietrich 6932890b98SMarc Dietrich printk("unhandled msg type %ld, payload: ", event_type); 7032890b98SMarc Dietrich for (i = 0; i < msg[1]; i++) 7132890b98SMarc Dietrich printk("%0x ", msg[i+2]); 7232890b98SMarc Dietrich printk("\n"); 7332890b98SMarc Dietrich 7432890b98SMarc Dietrich return NOTIFY_OK; 7532890b98SMarc Dietrich } 7632890b98SMarc Dietrich 7732890b98SMarc Dietrich void nvec_write_async(struct nvec_chip *nvec, unsigned char *data, short size) 7832890b98SMarc Dietrich { 7932890b98SMarc Dietrich struct nvec_msg *msg = kzalloc(sizeof(struct nvec_msg), GFP_NOWAIT); 8032890b98SMarc Dietrich 8132890b98SMarc Dietrich msg->data = kzalloc(size, GFP_NOWAIT); 8232890b98SMarc Dietrich msg->data[0] = size; 8332890b98SMarc Dietrich memcpy(msg->data + 1, data, size); 8432890b98SMarc Dietrich msg->size = size + 1; 8532890b98SMarc Dietrich msg->pos = 0; 8632890b98SMarc Dietrich INIT_LIST_HEAD(&msg->node); 8732890b98SMarc Dietrich 8832890b98SMarc Dietrich list_add_tail(&msg->node, &nvec->tx_data); 8932890b98SMarc Dietrich 9032890b98SMarc Dietrich gpio_set_value(nvec->gpio, 0); 9132890b98SMarc Dietrich } 9232890b98SMarc Dietrich EXPORT_SYMBOL(nvec_write_async); 9332890b98SMarc Dietrich 9432890b98SMarc Dietrich static void nvec_request_master(struct work_struct *work) 9532890b98SMarc Dietrich { 9632890b98SMarc Dietrich struct nvec_chip *nvec = container_of(work, struct nvec_chip, tx_work); 9732890b98SMarc Dietrich 9832890b98SMarc Dietrich if(!list_empty(&nvec->tx_data)) { 9932890b98SMarc Dietrich gpio_set_value(nvec->gpio, 0); 10032890b98SMarc Dietrich } 10132890b98SMarc Dietrich } 10232890b98SMarc Dietrich 10332890b98SMarc Dietrich static int parse_msg(struct nvec_chip *nvec, struct nvec_msg *msg) 10432890b98SMarc Dietrich { 10532890b98SMarc Dietrich int i; 10632890b98SMarc Dietrich 10732890b98SMarc Dietrich if((msg->data[0] & 1<<7) == 0 && msg->data[3]) { 10832890b98SMarc Dietrich dev_err(nvec->dev, "ec responded %02x %02x %02x %02x\n", msg->data[0], 10932890b98SMarc Dietrich msg->data[1], msg->data[2], msg->data[3]); 11032890b98SMarc Dietrich return -EINVAL; 11132890b98SMarc Dietrich } 11232890b98SMarc Dietrich 11332890b98SMarc Dietrich if ((msg->data[0] >> 7 ) == 1 && (msg->data[0] & 0x0f) == 5) 11432890b98SMarc Dietrich { 11532890b98SMarc Dietrich dev_warn(nvec->dev, "ec system event "); 11632890b98SMarc Dietrich for (i=0; i < msg->data[1]; i++) 11732890b98SMarc Dietrich dev_warn(nvec->dev, "%02x ", msg->data[2+i]); 11832890b98SMarc Dietrich dev_warn(nvec->dev, "\n"); 11932890b98SMarc Dietrich } 12032890b98SMarc Dietrich 12132890b98SMarc Dietrich atomic_notifier_call_chain(&nvec->notifier_list, msg->data[0] & 0x8f, msg->data); 12232890b98SMarc Dietrich 12332890b98SMarc Dietrich return 0; 12432890b98SMarc Dietrich } 12532890b98SMarc Dietrich 12632890b98SMarc Dietrich static struct nvec_msg *nvec_write_sync(struct nvec_chip *nvec, unsigned char *data, short size) 12732890b98SMarc Dietrich { 12832890b98SMarc Dietrich down(&nvec->sync_write_mutex); 12932890b98SMarc Dietrich 13032890b98SMarc Dietrich nvec->sync_write_pending = (data[1] << 8) + data[0]; 13132890b98SMarc Dietrich nvec_write_async(nvec, data, size); 13232890b98SMarc Dietrich 13332890b98SMarc Dietrich dev_dbg(nvec->dev, "nvec_sync_write: 0x%04x\n", nvec->sync_write_pending); 13432890b98SMarc Dietrich wait_for_completion(&nvec->sync_write); 13532890b98SMarc Dietrich dev_dbg(nvec->dev, "nvec_sync_write: pong!\n"); 13632890b98SMarc Dietrich 13732890b98SMarc Dietrich up(&nvec->sync_write_mutex); 13832890b98SMarc Dietrich 13932890b98SMarc Dietrich return nvec->last_sync_msg; 14032890b98SMarc Dietrich } 14132890b98SMarc Dietrich 14232890b98SMarc Dietrich /* RX worker */ 14332890b98SMarc Dietrich static void nvec_dispatch(struct work_struct *work) 14432890b98SMarc Dietrich { 14532890b98SMarc Dietrich struct nvec_chip *nvec = container_of(work, struct nvec_chip, rx_work); 14632890b98SMarc Dietrich struct nvec_msg *msg; 14732890b98SMarc Dietrich 14832890b98SMarc Dietrich while(!list_empty(&nvec->rx_data)) 14932890b98SMarc Dietrich { 15032890b98SMarc Dietrich msg = list_first_entry(&nvec->rx_data, struct nvec_msg, node); 15132890b98SMarc Dietrich list_del_init(&msg->node); 15232890b98SMarc Dietrich 15332890b98SMarc Dietrich if(nvec->sync_write_pending == (msg->data[2] << 8) + msg->data[0]) 15432890b98SMarc Dietrich { 15532890b98SMarc Dietrich dev_dbg(nvec->dev, "sync write completed!\n"); 15632890b98SMarc Dietrich nvec->sync_write_pending = 0; 15732890b98SMarc Dietrich nvec->last_sync_msg = msg; 15832890b98SMarc Dietrich complete(&nvec->sync_write); 15932890b98SMarc Dietrich } else { 16032890b98SMarc Dietrich parse_msg(nvec, msg); 16132890b98SMarc Dietrich if((!msg) || (!msg->data)) 162f686e9afSMarc Dietrich dev_warn(nvec->dev, "attempt access zero pointer\n"); 16332890b98SMarc Dietrich else { 16432890b98SMarc Dietrich kfree(msg->data); 16532890b98SMarc Dietrich kfree(msg); 16632890b98SMarc Dietrich } 16732890b98SMarc Dietrich } 16832890b98SMarc Dietrich } 16932890b98SMarc Dietrich } 17032890b98SMarc Dietrich 171f686e9afSMarc Dietrich static irqreturn_t nvec_interrupt(int irq, void *dev) 17232890b98SMarc Dietrich { 17332890b98SMarc Dietrich unsigned long status; 17432890b98SMarc Dietrich unsigned long received; 17532890b98SMarc Dietrich unsigned char to_send; 17632890b98SMarc Dietrich struct nvec_msg *msg; 17732890b98SMarc Dietrich struct nvec_chip *nvec = (struct nvec_chip *)dev; 178f686e9afSMarc Dietrich void __iomem *base = nvec->base; 17932890b98SMarc Dietrich 180f686e9afSMarc Dietrich status = readl(base + I2C_SL_STATUS); 18132890b98SMarc Dietrich 18232890b98SMarc Dietrich if(!(status & I2C_SL_IRQ)) 18332890b98SMarc Dietrich { 18432890b98SMarc Dietrich dev_warn(nvec->dev, "nvec Spurious IRQ\n"); 18532890b98SMarc Dietrich //Yup, handled. ahum. 18632890b98SMarc Dietrich goto handled; 18732890b98SMarc Dietrich } 18832890b98SMarc Dietrich if(status & END_TRANS && !(status & RCVD)) 18932890b98SMarc Dietrich { 19032890b98SMarc Dietrich //Reenable IRQ only when even has been sent 19132890b98SMarc Dietrich //printk("Write sequence ended !\n"); 19232890b98SMarc Dietrich //parse_msg(nvec); 19332890b98SMarc Dietrich nvec->state = NVEC_WAIT; 19432890b98SMarc Dietrich if(nvec->rx->size > 1) 19532890b98SMarc Dietrich { 19632890b98SMarc Dietrich list_add_tail(&nvec->rx->node, &nvec->rx_data); 19732890b98SMarc Dietrich schedule_work(&nvec->rx_work); 19832890b98SMarc Dietrich } else { 19932890b98SMarc Dietrich kfree(nvec->rx->data); 20032890b98SMarc Dietrich kfree(nvec->rx); 20132890b98SMarc Dietrich } 20232890b98SMarc Dietrich return IRQ_HANDLED; 20332890b98SMarc Dietrich } else if(status & RNW) 20432890b98SMarc Dietrich { 20532890b98SMarc Dietrich // Work around for AP20 New Slave Hw Bug. Give 1us extra. 20632890b98SMarc Dietrich // nvec/smbus/nvec_i2c_transport.c in NV`s crap for reference 20732890b98SMarc Dietrich if(status & RCVD) 20832890b98SMarc Dietrich udelay(3); 20932890b98SMarc Dietrich 21032890b98SMarc Dietrich if(status & RCVD) 21132890b98SMarc Dietrich { 21232890b98SMarc Dietrich nvec->state = NVEC_WRITE; 21332890b98SMarc Dietrich //Master wants something from us. New communication 21432890b98SMarc Dietrich // dev_dbg(nvec->dev, "New read comm!\n"); 21532890b98SMarc Dietrich } else { 21632890b98SMarc Dietrich //Master wants something from us from a communication we've already started 21732890b98SMarc Dietrich // dev_dbg(nvec->dev, "Read comm cont !\n"); 21832890b98SMarc Dietrich } 21932890b98SMarc Dietrich //if(msg_pos<msg_size) { 22032890b98SMarc Dietrich if(list_empty(&nvec->tx_data)) 22132890b98SMarc Dietrich { 22232890b98SMarc Dietrich dev_err(nvec->dev, "nvec empty tx - sending no-op\n"); 22332890b98SMarc Dietrich to_send = 0x8a; 22432890b98SMarc Dietrich nvec_write_async(nvec, "\x07\x02", 2); 22532890b98SMarc Dietrich // to_send = 0x01; 22632890b98SMarc Dietrich } else { 22732890b98SMarc Dietrich msg = list_first_entry(&nvec->tx_data, struct nvec_msg, node); 22832890b98SMarc Dietrich if(msg->pos < msg->size) { 22932890b98SMarc Dietrich to_send = msg->data[msg->pos]; 23032890b98SMarc Dietrich msg->pos++; 23132890b98SMarc Dietrich } else { 23232890b98SMarc Dietrich dev_err(nvec->dev, "nvec crap! %d\n", msg->size); 23332890b98SMarc Dietrich to_send = 0x01; 23432890b98SMarc Dietrich } 23532890b98SMarc Dietrich 23632890b98SMarc Dietrich if(msg->pos >= msg->size) 23732890b98SMarc Dietrich { 23832890b98SMarc Dietrich list_del_init(&msg->node); 23932890b98SMarc Dietrich kfree(msg->data); 24032890b98SMarc Dietrich kfree(msg); 24132890b98SMarc Dietrich schedule_work(&nvec->tx_work); 24232890b98SMarc Dietrich nvec->state = NVEC_WAIT; 24332890b98SMarc Dietrich } 24432890b98SMarc Dietrich } 245f686e9afSMarc Dietrich writel(to_send, base + I2C_SL_RCVD); 24632890b98SMarc Dietrich 24732890b98SMarc Dietrich gpio_set_value(nvec->gpio, 1); 24832890b98SMarc Dietrich 24932890b98SMarc Dietrich dev_dbg(nvec->dev, "nvec sent %x\n", to_send); 25032890b98SMarc Dietrich 25132890b98SMarc Dietrich goto handled; 25232890b98SMarc Dietrich } else { 253f686e9afSMarc Dietrich received = readl(base + I2C_SL_RCVD); 25432890b98SMarc Dietrich //Workaround? 25532890b98SMarc Dietrich if(status & RCVD) { 256f686e9afSMarc Dietrich writel(0, base + I2C_SL_RCVD); 25732890b98SMarc Dietrich goto handled; 25832890b98SMarc Dietrich } 25932890b98SMarc Dietrich 26032890b98SMarc Dietrich if (nvec->state == NVEC_WAIT) 26132890b98SMarc Dietrich { 26232890b98SMarc Dietrich nvec->state = NVEC_READ; 26332890b98SMarc Dietrich msg = kzalloc(sizeof(struct nvec_msg), GFP_NOWAIT); 26432890b98SMarc Dietrich msg->data = kzalloc(32, GFP_NOWAIT); 26532890b98SMarc Dietrich INIT_LIST_HEAD(&msg->node); 26632890b98SMarc Dietrich nvec->rx = msg; 26732890b98SMarc Dietrich } else 26832890b98SMarc Dietrich msg = nvec->rx; 26932890b98SMarc Dietrich 27032890b98SMarc Dietrich BUG_ON(msg->pos > 32); 27132890b98SMarc Dietrich 27232890b98SMarc Dietrich msg->data[msg->pos] = received; 27332890b98SMarc Dietrich msg->pos++; 27432890b98SMarc Dietrich msg->size = msg->pos; 27532890b98SMarc Dietrich dev_dbg(nvec->dev, "Got %02lx from Master (pos: %d)!\n", received, msg->pos); 27632890b98SMarc Dietrich } 27732890b98SMarc Dietrich handled: 27832890b98SMarc Dietrich return IRQ_HANDLED; 27932890b98SMarc Dietrich } 28032890b98SMarc Dietrich 281f686e9afSMarc Dietrich static void tegra_init_i2c_slave(struct nvec_chip *nvec) 28232890b98SMarc Dietrich { 28332890b98SMarc Dietrich u32 val; 28432890b98SMarc Dietrich 285f686e9afSMarc Dietrich clk_enable(nvec->i2c_clk); 286f686e9afSMarc Dietrich 287f686e9afSMarc Dietrich tegra_periph_reset_assert(nvec->i2c_clk); 28832890b98SMarc Dietrich udelay(2); 289f686e9afSMarc Dietrich tegra_periph_reset_deassert(nvec->i2c_clk); 29032890b98SMarc Dietrich 291f686e9afSMarc Dietrich writel(nvec->i2c_addr>>1, nvec->base + I2C_SL_ADDR1); 292f686e9afSMarc Dietrich writel(0, nvec->base + I2C_SL_ADDR2); 29332890b98SMarc Dietrich 294f686e9afSMarc Dietrich writel(0x1E, nvec->base + I2C_SL_DELAY_COUNT); 29532890b98SMarc Dietrich val = I2C_CNFG_NEW_MASTER_SFM | I2C_CNFG_PACKET_MODE_EN | 29632890b98SMarc Dietrich (0x2 << I2C_CNFG_DEBOUNCE_CNT_SHIFT); 297f686e9afSMarc Dietrich writel(val, nvec->base + I2C_CNFG); 298f686e9afSMarc Dietrich writel(I2C_SL_NEWL, nvec->base + I2C_SL_CNFG); 29932890b98SMarc Dietrich 300f686e9afSMarc Dietrich clk_disable(nvec->i2c_clk); 30132890b98SMarc Dietrich } 30232890b98SMarc Dietrich 30332890b98SMarc Dietrich static void nvec_power_off(void) 30432890b98SMarc Dietrich { 30532890b98SMarc Dietrich nvec_write_async(nvec_power_handle, EC_DISABLE_EVENT_REPORTING, 3); 30632890b98SMarc Dietrich nvec_write_async(nvec_power_handle, "\x04\x01", 2); 30732890b98SMarc Dietrich } 30832890b98SMarc Dietrich 30932890b98SMarc Dietrich static int __devinit tegra_nvec_probe(struct platform_device *pdev) 31032890b98SMarc Dietrich { 311f686e9afSMarc Dietrich int err, ret; 31232890b98SMarc Dietrich struct clk *i2c_clk; 31332890b98SMarc Dietrich struct nvec_platform_data *pdata = pdev->dev.platform_data; 31432890b98SMarc Dietrich struct nvec_chip *nvec; 31532890b98SMarc Dietrich struct nvec_msg *msg; 316f686e9afSMarc Dietrich struct resource *res; 317f686e9afSMarc Dietrich struct resource *iomem; 318f686e9afSMarc Dietrich void __iomem *base; 31932890b98SMarc Dietrich 32032890b98SMarc Dietrich nvec = kzalloc(sizeof(struct nvec_chip), GFP_KERNEL); 32132890b98SMarc Dietrich if(nvec == NULL) { 32232890b98SMarc Dietrich dev_err(&pdev->dev, "failed to reserve memory\n"); 32332890b98SMarc Dietrich return -ENOMEM; 32432890b98SMarc Dietrich } 32532890b98SMarc Dietrich platform_set_drvdata(pdev, nvec); 32632890b98SMarc Dietrich nvec->dev = &pdev->dev; 32732890b98SMarc Dietrich nvec->gpio = pdata->gpio; 328f686e9afSMarc Dietrich nvec->i2c_addr = pdata->i2c_addr; 32932890b98SMarc Dietrich 330f686e9afSMarc Dietrich res = platform_get_resource(pdev, IORESOURCE_MEM, 0); 331f686e9afSMarc Dietrich if (!res) { 332f686e9afSMarc Dietrich dev_err(&pdev->dev, "no mem resource?\n"); 333f686e9afSMarc Dietrich return -ENODEV; 33432890b98SMarc Dietrich } 33532890b98SMarc Dietrich 336f686e9afSMarc Dietrich iomem = request_mem_region(res->start, resource_size(res), pdev->name); 337f686e9afSMarc Dietrich if (!iomem) { 338f686e9afSMarc Dietrich dev_err(&pdev->dev, "I2C region already claimed\n"); 339f686e9afSMarc Dietrich return -EBUSY; 34032890b98SMarc Dietrich } 34132890b98SMarc Dietrich 342f686e9afSMarc Dietrich base = ioremap(iomem->start, resource_size(iomem)); 343f686e9afSMarc Dietrich if (!base) { 344f686e9afSMarc Dietrich dev_err(&pdev->dev, "Can't ioremap I2C region\n"); 345f686e9afSMarc Dietrich return -ENOMEM; 346f686e9afSMarc Dietrich } 34732890b98SMarc Dietrich 348f686e9afSMarc Dietrich res = platform_get_resource(pdev, IORESOURCE_IRQ, 0); 349f686e9afSMarc Dietrich if (!res) { 350f686e9afSMarc Dietrich dev_err(&pdev->dev, "no irq resource?\n"); 351f686e9afSMarc Dietrich ret = -ENODEV; 352f686e9afSMarc Dietrich goto err_iounmap; 353f686e9afSMarc Dietrich } 354f686e9afSMarc Dietrich 355f686e9afSMarc Dietrich i2c_clk = clk_get_sys("tegra-i2c.2", NULL); 356f686e9afSMarc Dietrich if (IS_ERR(i2c_clk)) { 357f686e9afSMarc Dietrich dev_err(nvec->dev, "failed to get controller clock\n"); 358f686e9afSMarc Dietrich goto err_iounmap; 35932890b98SMarc Dietrich } 36032890b98SMarc Dietrich 36132890b98SMarc Dietrich clk_enable(i2c_clk); 36232890b98SMarc Dietrich clk_set_rate(i2c_clk, 8*80000); 36332890b98SMarc Dietrich 364f686e9afSMarc Dietrich nvec->base = base; 365f686e9afSMarc Dietrich nvec->irq = res->start; 366f686e9afSMarc Dietrich nvec->i2c_clk = i2c_clk; 367f686e9afSMarc Dietrich 36832890b98SMarc Dietrich /* Set the gpio to low when we've got something to say */ 36932890b98SMarc Dietrich err = gpio_request(nvec->gpio, "nvec gpio"); 37032890b98SMarc Dietrich if(err < 0) 37132890b98SMarc Dietrich dev_err(nvec->dev, "couldn't request gpio\n"); 37232890b98SMarc Dietrich 37332890b98SMarc Dietrich ATOMIC_INIT_NOTIFIER_HEAD(&nvec->notifier_list); 37432890b98SMarc Dietrich 37532890b98SMarc Dietrich init_completion(&nvec->sync_write); 37632890b98SMarc Dietrich sema_init(&nvec->sync_write_mutex, 1); 37732890b98SMarc Dietrich INIT_LIST_HEAD(&nvec->tx_data); 37832890b98SMarc Dietrich INIT_LIST_HEAD(&nvec->rx_data); 37932890b98SMarc Dietrich INIT_WORK(&nvec->rx_work, nvec_dispatch); 38032890b98SMarc Dietrich INIT_WORK(&nvec->tx_work, nvec_request_master); 38132890b98SMarc Dietrich 382f686e9afSMarc Dietrich err = request_irq(nvec->irq, nvec_interrupt, 0, "nvec", nvec); 383f686e9afSMarc Dietrich if (err) { 384f686e9afSMarc Dietrich dev_err(nvec->dev, "couldn't request irq\n"); 385f686e9afSMarc Dietrich goto failed; 386f686e9afSMarc Dietrich } 387f686e9afSMarc Dietrich 388f686e9afSMarc Dietrich tegra_init_i2c_slave(nvec); 389f686e9afSMarc Dietrich 390f686e9afSMarc Dietrich gpio_direction_output(nvec->gpio, 1); 391f686e9afSMarc Dietrich gpio_set_value(nvec->gpio, 1); 392f686e9afSMarc Dietrich 39332890b98SMarc Dietrich /* enable event reporting */ 39432890b98SMarc Dietrich nvec_write_async(nvec, EC_ENABLE_EVENT_REPORTING, 39532890b98SMarc Dietrich sizeof(EC_ENABLE_EVENT_REPORTING)); 39632890b98SMarc Dietrich 39732890b98SMarc Dietrich nvec->nvec_status_notifier.notifier_call = nvec_status_notifier; 39832890b98SMarc Dietrich nvec_register_notifier(nvec, &nvec->nvec_status_notifier, 0); 39932890b98SMarc Dietrich 40032890b98SMarc Dietrich nvec_power_handle = nvec; 40132890b98SMarc Dietrich pm_power_off = nvec_power_off; 40232890b98SMarc Dietrich 40332890b98SMarc Dietrich /* Get Firmware Version */ 40432890b98SMarc Dietrich msg = nvec_write_sync(nvec, EC_GET_FIRMWARE_VERSION, 40532890b98SMarc Dietrich sizeof(EC_GET_FIRMWARE_VERSION)); 40632890b98SMarc Dietrich 40732890b98SMarc Dietrich dev_warn(nvec->dev, "ec firmware version %02x.%02x.%02x / %02x\n", 40832890b98SMarc Dietrich msg->data[4], msg->data[5], msg->data[6], msg->data[7]); 40932890b98SMarc Dietrich 41032890b98SMarc Dietrich kfree(msg->data); 41132890b98SMarc Dietrich kfree(msg); 41232890b98SMarc Dietrich 413f686e9afSMarc Dietrich ret = mfd_add_devices(nvec->dev, -1, nvec_devices, 414f686e9afSMarc Dietrich ARRAY_SIZE(nvec_devices), base, 0); 415f686e9afSMarc Dietrich if(ret) 416f686e9afSMarc Dietrich dev_err(nvec->dev, "error adding subdevices\n"); 417f686e9afSMarc Dietrich 41832890b98SMarc Dietrich /* unmute speakers? */ 41932890b98SMarc Dietrich nvec_write_async(nvec, "\x0d\x10\x59\x94", 4); 42032890b98SMarc Dietrich 42132890b98SMarc Dietrich /* enable lid switch event */ 42232890b98SMarc Dietrich nvec_write_async(nvec, "\x01\x01\x01\x00\x00\x02\x00", 7); 42332890b98SMarc Dietrich 42432890b98SMarc Dietrich /* enable power button event */ 42532890b98SMarc Dietrich nvec_write_async(nvec, "\x01\x01\x01\x00\x00\x80\x00", 7); 42632890b98SMarc Dietrich 42732890b98SMarc Dietrich return 0; 42832890b98SMarc Dietrich 429f686e9afSMarc Dietrich err_iounmap: 430f686e9afSMarc Dietrich iounmap(base); 43132890b98SMarc Dietrich failed: 43232890b98SMarc Dietrich kfree(nvec); 43332890b98SMarc Dietrich return -ENOMEM; 43432890b98SMarc Dietrich } 43532890b98SMarc Dietrich 43632890b98SMarc Dietrich static int __devexit tegra_nvec_remove(struct platform_device *pdev) 43732890b98SMarc Dietrich { 438f686e9afSMarc Dietrich struct nvec_chip *nvec = platform_get_drvdata(pdev); 439f686e9afSMarc Dietrich 440f686e9afSMarc Dietrich nvec_write_async(nvec, EC_DISABLE_EVENT_REPORTING, 3); 441f686e9afSMarc Dietrich mfd_remove_devices(nvec->dev); 442f686e9afSMarc Dietrich free_irq(nvec->irq, &nvec_interrupt); 443f686e9afSMarc Dietrich iounmap(nvec->base); 444f686e9afSMarc Dietrich gpio_free(nvec->gpio); 445f686e9afSMarc Dietrich kfree(nvec); 446f686e9afSMarc Dietrich 44732890b98SMarc Dietrich return 0; 44832890b98SMarc Dietrich } 44932890b98SMarc Dietrich 45032890b98SMarc Dietrich #ifdef CONFIG_PM 45132890b98SMarc Dietrich 45232890b98SMarc Dietrich static int tegra_nvec_suspend(struct platform_device *pdev, pm_message_t state) 45332890b98SMarc Dietrich { 45432890b98SMarc Dietrich struct nvec_chip *nvec = platform_get_drvdata(pdev); 45532890b98SMarc Dietrich 45632890b98SMarc Dietrich dev_dbg(nvec->dev, "suspending\n"); 45732890b98SMarc Dietrich nvec_write_async(nvec, EC_DISABLE_EVENT_REPORTING, 3); 45832890b98SMarc Dietrich nvec_write_async(nvec, "\x04\x02", 2); 45932890b98SMarc Dietrich 46032890b98SMarc Dietrich return 0; 46132890b98SMarc Dietrich } 46232890b98SMarc Dietrich 46332890b98SMarc Dietrich static int tegra_nvec_resume(struct platform_device *pdev) { 46432890b98SMarc Dietrich 46532890b98SMarc Dietrich struct nvec_chip *nvec = platform_get_drvdata(pdev); 46632890b98SMarc Dietrich 46732890b98SMarc Dietrich dev_dbg(nvec->dev, "resuming\n"); 468f686e9afSMarc Dietrich tegra_init_i2c_slave(nvec); 46932890b98SMarc Dietrich nvec_write_async(nvec, EC_ENABLE_EVENT_REPORTING, 3); 47032890b98SMarc Dietrich 47132890b98SMarc Dietrich return 0; 47232890b98SMarc Dietrich } 47332890b98SMarc Dietrich 47432890b98SMarc Dietrich #else 47532890b98SMarc Dietrich #define tegra_nvec_suspend NULL 47632890b98SMarc Dietrich #define tegra_nvec_resume NULL 47732890b98SMarc Dietrich #endif 47832890b98SMarc Dietrich 47932890b98SMarc Dietrich static struct platform_driver nvec_device_driver = 48032890b98SMarc Dietrich { 48132890b98SMarc Dietrich .probe = tegra_nvec_probe, 48232890b98SMarc Dietrich .remove = __devexit_p(tegra_nvec_remove), 48332890b98SMarc Dietrich .suspend = tegra_nvec_suspend, 48432890b98SMarc Dietrich .resume = tegra_nvec_resume, 48532890b98SMarc Dietrich .driver = { 48632890b98SMarc Dietrich .name = "nvec", 48732890b98SMarc Dietrich .owner = THIS_MODULE, 48832890b98SMarc Dietrich } 48932890b98SMarc Dietrich }; 49032890b98SMarc Dietrich 49132890b98SMarc Dietrich static int __init tegra_nvec_init(void) 49232890b98SMarc Dietrich { 49332890b98SMarc Dietrich return platform_driver_register(&nvec_device_driver); 49432890b98SMarc Dietrich } 49532890b98SMarc Dietrich 49632890b98SMarc Dietrich module_init(tegra_nvec_init); 49732890b98SMarc Dietrich MODULE_ALIAS("platform:nvec"); 498