| // Copyright 2017 The Fuchsia Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #include <ddk/binding.h> |
| #include <ddk/debug.h> |
| #include <ddk/device.h> |
| #include <ddk/mmio-buffer.h> |
| #include <ddk/platform-defs.h> |
| #include <ddk/protocol/i2c-impl.h> |
| #include <ddk/protocol/platform-bus.h> |
| #include <ddk/protocol/platform-device.h> |
| #include <hw/reg.h> |
| #include <lib/sync/completion.h> |
| #include <zircon/process.h> |
| #include <zircon/assert.h> |
| |
| #include <stdlib.h> |
| #include <stdio.h> |
| #include <string.h> |
| #include <unistd.h> |
| #include <threads.h> |
| |
| #include "dw-i2c-regs.h" |
| |
| typedef struct { |
| zx_handle_t irq_handle; |
| zx_handle_t event_handle; |
| mmio_buffer_t regs_iobuff; |
| zx_duration_t timeout; |
| |
| uint32_t tx_fifo_depth; |
| uint32_t rx_fifo_depth; |
| } i2c_dw_dev_t; |
| |
| typedef struct { |
| platform_device_protocol_t pdev; |
| i2c_impl_protocol_t i2c; |
| zx_device_t* zxdev; |
| i2c_dw_dev_t* i2c_devs; |
| size_t i2c_dev_count; |
| } i2c_dw_t; |
| |
| static zx_status_t i2c_dw_read(i2c_dw_dev_t* dev, uint8_t *buff, uint32_t len, bool stop); |
| static zx_status_t i2c_dw_write(i2c_dw_dev_t* dev, const uint8_t *buff, uint32_t len, bool stop); |
| static zx_status_t i2c_dw_set_slave_addr(i2c_dw_dev_t* dev, uint16_t addr); |
| |
| zx_status_t i2c_dw_dumpstate(i2c_dw_dev_t* dev) { |
| zxlogf(INFO, "########################\n"); |
| zxlogf(INFO, "%s\n", __FUNCTION__); |
| zxlogf(INFO, "########################\n"); |
| zxlogf(INFO, "DW_I2C_ENABLE_STATUS = \t0x%x\n", I2C_DW_READ32(DW_I2C_ENABLE_STATUS)); |
| zxlogf(INFO, "DW_I2C_ENABLE = \t0x%x\n", I2C_DW_READ32(DW_I2C_ENABLE)); |
| zxlogf(INFO, "DW_I2C_CON = \t0x%x\n", I2C_DW_READ32(DW_I2C_CON)); |
| zxlogf(INFO, "DW_I2C_TAR = \t0x%x\n", I2C_DW_READ32(DW_I2C_TAR)); |
| zxlogf(INFO, "DW_I2C_HS_MADDR = \t0x%x\n", I2C_DW_READ32(DW_I2C_HS_MADDR)); |
| zxlogf(INFO, "DW_I2C_SS_SCL_HCNT = \t0x%x\n", I2C_DW_READ32(DW_I2C_SS_SCL_HCNT)); |
| zxlogf(INFO, "DW_I2C_SS_SCL_LCNT = \t0x%x\n", I2C_DW_READ32(DW_I2C_SS_SCL_LCNT)); |
| zxlogf(INFO, "DW_I2C_FS_SCL_HCNT = \t0x%x\n", I2C_DW_READ32(DW_I2C_FS_SCL_HCNT)); |
| zxlogf(INFO, "DW_I2C_FS_SCL_LCNT = \t0x%x\n", I2C_DW_READ32(DW_I2C_FS_SCL_LCNT)); |
| zxlogf(INFO, "DW_I2C_INTR_MASK = \t0x%x\n", I2C_DW_READ32(DW_I2C_INTR_MASK)); |
| zxlogf(INFO, "DW_I2C_RAW_INTR_STAT = \t0x%x\n", I2C_DW_READ32(DW_I2C_RAW_INTR_STAT)); |
| zxlogf(INFO, "DW_I2C_RX_TL = \t0x%x\n", I2C_DW_READ32(DW_I2C_RX_TL)); |
| zxlogf(INFO, "DW_I2C_TX_TL = \t0x%x\n", I2C_DW_READ32(DW_I2C_TX_TL)); |
| zxlogf(INFO, "DW_I2C_STATUS = \t0x%x\n", I2C_DW_READ32(DW_I2C_STATUS)); |
| zxlogf(INFO, "DW_I2C_TXFLR = \t0x%x\n", I2C_DW_READ32(DW_I2C_TXFLR)); |
| zxlogf(INFO, "DW_I2C_RXFLR = \t0x%x\n", I2C_DW_READ32(DW_I2C_RXFLR)); |
| zxlogf(INFO, "DW_I2C_COMP_PARAM_1 = \t0x%x\n", I2C_DW_READ32(DW_I2C_COMP_PARAM_1)); |
| zxlogf(INFO, "DW_I2C_TX_ABRT_SOURCE = \t0x%x\n", I2C_DW_READ32(DW_I2C_TX_ABRT_SOURCE)); |
| return ZX_OK; |
| } |
| |
| static zx_status_t i2c_dw_enable_wait(i2c_dw_dev_t* dev, bool enable) { |
| int max_poll = 100; |
| int poll = 0; |
| |
| // set enable bit to 0 |
| I2C_DW_SET_BITS32(DW_I2C_ENABLE, DW_I2C_ENABLE_ENABLE_START, DW_I2C_ENABLE_ENABLE_BITS, enable); |
| |
| do { |
| if (I2C_DW_GET_BITS32(DW_I2C_ENABLE_STATUS, DW_I2C_ENABLE_STATUS_EN_START, |
| DW_I2C_ENABLE_STATUS_EN_BITS) == enable) { |
| // we are done. exit |
| return ZX_OK; |
| } |
| // sleep 10 times the signaling period for the highest i2c transfer speed (400K) ~25uS |
| usleep(25); |
| } while (poll++ < max_poll); |
| |
| zxlogf(ERROR, "%s: Could not %s I2C contoller! DW_I2C_ENABLE_STATUS = 0x%x\n", |
| __FUNCTION__, |
| enable? "enable" : "disable", |
| I2C_DW_READ32(DW_I2C_ENABLE_STATUS)); |
| i2c_dw_dumpstate(dev); |
| |
| return ZX_ERR_TIMED_OUT; |
| } |
| |
| static zx_status_t i2c_dw_enable(i2c_dw_dev_t* dev) { |
| return i2c_dw_enable_wait(dev, I2C_ENABLE); |
| return ZX_OK; |
| } |
| |
| static void i2c_dw_clear_intrrupts(i2c_dw_dev_t* dev) { |
| I2C_DW_READ32(DW_I2C_CLR_INTR); // reading this register will clear all the interrupts |
| } |
| |
| static void i2c_dw_disable_interrupts(i2c_dw_dev_t* dev) { |
| I2C_DW_WRITE32(DW_I2C_INTR_MASK, 0); |
| } |
| |
| static void i2c_dw_enable_interrupts(i2c_dw_dev_t* dev, uint32_t flag) { |
| I2C_DW_WRITE32(DW_I2C_INTR_MASK, flag); |
| } |
| |
| static zx_status_t i2c_dw_disable(i2c_dw_dev_t* dev) { |
| return i2c_dw_enable_wait(dev, I2C_DISABLE); |
| } |
| |
| static zx_status_t i2c_dw_wait_event(i2c_dw_dev_t* dev, uint32_t sig_mask) { |
| uint32_t observed; |
| zx_time_t deadline = zx_deadline_after(dev->timeout); |
| |
| sig_mask |= I2C_ERROR_SIGNAL; |
| |
| zx_status_t status = zx_object_wait_one(dev->event_handle, sig_mask, deadline, &observed); |
| |
| if (status != ZX_OK) { |
| return status; |
| } |
| |
| zx_object_signal(dev->event_handle, observed, 0); |
| |
| if (observed & I2C_ERROR_SIGNAL) { |
| return ZX_ERR_TIMED_OUT; |
| } |
| |
| return ZX_OK; |
| } |
| |
| // Thread to handle interrupts |
| static int i2c_dw_irq_thread(void* arg) { |
| i2c_dw_dev_t* dev = (i2c_dw_dev_t*)arg; |
| zx_status_t status; |
| |
| while (1) { |
| status = zx_interrupt_wait(dev->irq_handle, NULL); |
| if (status != ZX_OK) { |
| zxlogf(ERROR, "%s: irq wait failed, retcode = %d\n", __FUNCTION__, status); |
| continue; |
| } |
| |
| uint32_t reg = I2C_DW_READ32(DW_I2C_RAW_INTR_STAT); |
| if (reg & DW_I2C_INTR_TX_ABRT) { |
| // some sort of error has occured. figure it out |
| i2c_dw_dumpstate(dev); |
| zx_object_signal(dev->event_handle, 0, I2C_ERROR_SIGNAL); |
| zxlogf(ERROR, "i2c: error on bus\n"); |
| } else { |
| zx_object_signal(dev->event_handle, 0, I2C_TXN_COMPLETE_SIGNAL); |
| } |
| i2c_dw_clear_intrrupts(dev); |
| i2c_dw_disable_interrupts(dev); |
| } |
| |
| return ZX_OK; |
| } |
| |
| static zx_status_t i2c_dw_transact(void* ctx, uint32_t bus_id, i2c_impl_op_t* rws, size_t count) { |
| size_t i; |
| for (i = 0; i < count; ++i) { |
| if (rws[i].length > I2C_DW_MAX_TRANSFER) { |
| return ZX_ERR_OUT_OF_RANGE; |
| } |
| } |
| |
| i2c_dw_t* i2c = ctx; |
| |
| if (bus_id >= i2c->i2c_dev_count) { |
| return ZX_ERR_INVALID_ARGS; |
| } |
| |
| i2c_dw_dev_t* dev = &i2c->i2c_devs[bus_id]; |
| |
| if (count == 0) { |
| return ZX_OK; |
| } |
| for (i = 1; i < count; ++i) { |
| if (rws[i].address != rws[0].address) { |
| return ZX_ERR_NOT_SUPPORTED; |
| } |
| } |
| i2c_dw_set_slave_addr(dev, rws[0].address); |
| i2c_dw_enable(dev); |
| i2c_dw_disable_interrupts(dev); |
| i2c_dw_clear_intrrupts(dev); |
| |
| zx_status_t status = ZX_OK; |
| for (i = 0; i < count; ++i) { |
| if (rws[i].is_read) { |
| status = i2c_dw_read(dev, rws[i].buf, rws[i].length, rws[i].stop); |
| } else { |
| status = i2c_dw_write(dev, rws[i].buf, rws[i].length, rws[i].stop); |
| } |
| if (status != ZX_OK) { |
| return status; // TODO(andresoportus) release the bus |
| } |
| } |
| |
| i2c_dw_disable_interrupts(dev); |
| i2c_dw_clear_intrrupts(dev); |
| i2c_dw_disable(dev); |
| |
| return status; |
| } |
| |
| static zx_status_t i2c_dw_set_bitrate(void* ctx, uint32_t bus_id, uint32_t bitrate) { |
| // TODO: Can't implement due to lack of HI3660 documentation |
| return ZX_ERR_NOT_SUPPORTED; |
| } |
| |
| static uint32_t i2c_dw_get_bus_count(void* ctx) { |
| i2c_dw_t* i2c = ctx; |
| |
| return i2c->i2c_dev_count; |
| } |
| |
| static zx_status_t i2c_dw_get_max_transfer_size(void* ctx, uint32_t bus_id, size_t* out_size) { |
| *out_size = I2C_DW_MAX_TRANSFER; |
| return ZX_OK; |
| } |
| |
| static zx_status_t i2c_dw_set_slave_addr(i2c_dw_dev_t* dev, uint16_t addr) { |
| addr &= 0x7f; // support 7bit for now |
| uint32_t reg = I2C_DW_READ32(DW_I2C_TAR); |
| reg = I2C_DW_SET_MASK(reg, DW_I2C_TAR_TAR_START, DW_I2C_TAR_TAR_BITS, addr); |
| reg = I2C_DW_SET_MASK(reg, DW_I2C_TAR_10BIT_START, DW_I2C_TAR_10BIT_BITS, 0); |
| I2C_DW_WRITE32(DW_I2C_TAR, reg); |
| return ZX_OK; |
| } |
| |
| static zx_status_t i2c_dw_read(i2c_dw_dev_t* dev, uint8_t *buff, uint32_t len, bool stop) { |
| uint32_t rx_limit; |
| |
| ZX_DEBUG_ASSERT(len <= I2C_DW_MAX_TRANSFER); |
| rx_limit = dev->rx_fifo_depth - I2C_DW_READ32(DW_I2C_RXFLR); |
| ZX_DEBUG_ASSERT(len <= rx_limit); |
| |
| // set threshold to the number of bytes we want to read - 1 |
| I2C_DW_SET_BITS32(DW_I2C_RX_TL, DW_I2C_RX_TL_START, DW_I2C_RX_TL_BITS, len-1); |
| |
| while (len > 0) { |
| uint32_t cmd = 0; |
| // send STOP cmd if last byte and stop set |
| if (len == 1 && stop) { |
| cmd = I2C_DW_SET_MASK(cmd, DW_I2C_DATA_CMD_STOP_START, DW_I2C_DATA_CMD_STOP_BITS, 1); |
| } |
| I2C_DW_WRITE32(DW_I2C_DATA_CMD, cmd | (1 << DW_I2C_DATA_CMD_CMD_START)); |
| len--; |
| } |
| |
| i2c_dw_enable_interrupts(dev, DW_I2C_INTR_READ_INTR_MASK); |
| zx_status_t status = i2c_dw_wait_event(dev, I2C_TXN_COMPLETE_SIGNAL); |
| if (status != ZX_OK) { |
| return status; |
| } |
| |
| uint32_t avail_read = I2C_DW_READ32(DW_I2C_RXFLR); |
| for (uint32_t i = 0; i < avail_read; i++) { |
| buff[i] = I2C_DW_GET_BITS32(DW_I2C_DATA_CMD, DW_I2C_DATA_CMD_DAT_START, |
| DW_I2C_DATA_CMD_DAT_BITS); |
| } |
| |
| return ZX_OK; |
| } |
| |
| static zx_status_t i2c_dw_write(i2c_dw_dev_t* dev, const uint8_t *buff, uint32_t len, bool stop) { |
| uint32_t tx_limit; |
| |
| ZX_DEBUG_ASSERT(len <= I2C_DW_MAX_TRANSFER); |
| tx_limit = dev->tx_fifo_depth - I2C_DW_READ32(DW_I2C_TXFLR); |
| ZX_DEBUG_ASSERT(len <= tx_limit); |
| while (len > 0) { |
| uint32_t cmd = 0; |
| // send STOP cmd if last byte and stop set |
| if (len == 1 && stop) { |
| cmd = I2C_DW_SET_MASK(cmd, DW_I2C_DATA_CMD_STOP_START, DW_I2C_DATA_CMD_STOP_BITS, 1); |
| } |
| I2C_DW_WRITE32(DW_I2C_DATA_CMD, cmd | *buff++); |
| len--; |
| } |
| |
| // at this point, we have to wait until all data has been transmitted. |
| i2c_dw_enable_interrupts(dev, DW_I2C_INTR_DEFAULT_INTR_MASK); |
| zx_status_t status = i2c_dw_wait_event(dev, I2C_TXN_COMPLETE_SIGNAL); |
| if (status != ZX_OK) { |
| return status; |
| } |
| |
| return ZX_OK; |
| } |
| |
| static zx_status_t i2c_dw_host_init(i2c_dw_dev_t* dev) { |
| uint32_t dw_comp_type; |
| uint32_t regval; |
| |
| // Make sure we are truly running on a DesignWire IP |
| dw_comp_type = I2C_DW_READ32(DW_I2C_COMP_TYPE); |
| |
| if (dw_comp_type != I2C_DW_COMP_TYPE_NUM) { |
| zxlogf(ERROR, "%s: Incompatible IP Block detected. Expected = 0x%x, Actual = 0x%x\n", |
| __FUNCTION__, I2C_DW_COMP_TYPE_NUM, dw_comp_type); |
| |
| return ZX_ERR_NOT_SUPPORTED; |
| } |
| |
| // read the various capabitlies of the component |
| dev->tx_fifo_depth = I2C_DW_GET_BITS32(DW_I2C_COMP_PARAM_1, |
| DW_I2C_COMP_PARAM_1_TXFIFOSZ_START, |
| DW_I2C_COMP_PARAM_1_TXFIFOSZ_BITS); |
| dev->rx_fifo_depth = I2C_DW_GET_BITS32(DW_I2C_COMP_PARAM_1, |
| DW_I2C_COMP_PARAM_1_RXFIFOSZ_START, |
| DW_I2C_COMP_PARAM_1_RXFIFOSZ_BITS); |
| |
| /* I2C Block Initialization based on DW_apb_i2c_databook Section 7.3 */ |
| |
| // Disable I2C Block |
| i2c_dw_disable(dev); |
| |
| // Configure the controller: |
| // - Slave Disable |
| regval = 0; |
| regval = I2C_DW_SET_MASK(regval, DW_I2C_CON_SLAVE_DIS_START, |
| DW_I2C_CON_SLAVE_DIS_BITS, |
| I2C_ENABLE); |
| |
| // - Enable restart mode |
| regval = I2C_DW_SET_MASK(regval, DW_I2C_CON_RESTART_EN_START, |
| DW_I2C_CON_RESTART_EN_BITS, |
| I2C_ENABLE); |
| |
| // - Set 7-bit address modeset |
| regval = I2C_DW_SET_MASK(regval, DW_I2C_CON_10BITADDRSLAVE_START, |
| DW_I2C_CON_10BITADDRSLAVE_BITS, |
| I2C_7BIT_ADDR); |
| regval = I2C_DW_SET_MASK(regval, DW_I2C_CON_10BITADDRMASTER_START, |
| DW_I2C_CON_10BITADDRMASTER_BITS, |
| I2C_7BIT_ADDR); |
| |
| // - Set speed to fast, master enable |
| regval = I2C_DW_SET_MASK(regval, DW_I2C_CON_SPEED_START, |
| DW_I2C_CON_SPEED_BITS, |
| I2C_FAST_MODE); |
| |
| // - Set master enable |
| regval = I2C_DW_SET_MASK(regval, DW_I2C_CON_MASTER_MODE_START, |
| DW_I2C_CON_MASTER_MODE_BITS, |
| I2C_ENABLE); |
| |
| // write ifnal mask |
| I2C_DW_WRITE32(DW_I2C_CON, regval); |
| |
| // Write SS/FS LCNT and HCNT |
| // FIXME: for now I am using the magical numbers from android source |
| I2C_DW_SET_BITS32(DW_I2C_SS_SCL_HCNT, DW_I2C_SS_SCL_HCNT_START, DW_I2C_SS_SCL_HCNT_BITS, 0x87); |
| I2C_DW_SET_BITS32(DW_I2C_SS_SCL_LCNT, DW_I2C_SS_SCL_LCNT_START, DW_I2C_SS_SCL_LCNT_BITS, 0x9f); |
| I2C_DW_SET_BITS32(DW_I2C_FS_SCL_HCNT, DW_I2C_FS_SCL_HCNT_START, DW_I2C_FS_SCL_HCNT_BITS, 0x1a); |
| I2C_DW_SET_BITS32(DW_I2C_FS_SCL_LCNT, DW_I2C_FS_SCL_LCNT_START, DW_I2C_FS_SCL_LCNT_BITS, 0x32); |
| |
| // Setup TX FIFO Thresholds |
| I2C_DW_SET_BITS32(DW_I2C_TX_TL, DW_I2C_TX_TL_START, DW_I2C_TX_TL_BITS, 0); |
| |
| // disable interrupts |
| i2c_dw_disable_interrupts(dev); |
| |
| return ZX_OK; |
| } |
| |
| static zx_status_t i2c_dw_init(i2c_dw_t* i2c, uint32_t index) { |
| zx_status_t status; |
| |
| i2c_dw_dev_t* device = &i2c->i2c_devs[index]; |
| |
| device->timeout = ZX_SEC(10); |
| |
| status = pdev_map_mmio_buffer2(&i2c->pdev, index, ZX_CACHE_POLICY_UNCACHED_DEVICE, |
| &device->regs_iobuff); |
| if (status != ZX_OK) { |
| zxlogf(ERROR, "%s: pdev_map_mmio_buffer failed %d\n", __FUNCTION__, status); |
| goto init_fail; |
| } |
| |
| status = pdev_map_interrupt(&i2c->pdev, index, &device->irq_handle); |
| if (status != ZX_OK) { |
| goto init_fail; |
| } |
| |
| status = zx_event_create(0, &device->event_handle); |
| if (status != ZX_OK) { |
| goto init_fail; |
| } |
| |
| // initialize i2c host controller |
| status = i2c_dw_host_init(device); |
| if (status != ZX_OK) { |
| zxlogf(ERROR, "%s: failed to initialize i2c host controller %d", __FUNCTION__, status); |
| goto init_fail; |
| } |
| |
| thrd_t irq_thread; |
| thrd_create_with_name(&irq_thread, i2c_dw_irq_thread, device, "i2c_dw_irq_thread"); |
| |
| return ZX_OK; |
| |
| init_fail: |
| if (device) { |
| mmio_buffer_release(&device->regs_iobuff); |
| if (device->event_handle != ZX_HANDLE_INVALID) { |
| zx_handle_close(device->event_handle); |
| } |
| if (device->irq_handle != ZX_HANDLE_INVALID) { |
| zx_handle_close(device->irq_handle); |
| } |
| free(device); |
| } |
| return status; |
| } |
| |
| static i2c_impl_protocol_ops_t i2c_ops = { |
| .get_bus_count = i2c_dw_get_bus_count, |
| .get_max_transfer_size = i2c_dw_get_max_transfer_size, |
| .set_bitrate = i2c_dw_set_bitrate, |
| .transact = i2c_dw_transact, |
| }; |
| |
| static zx_protocol_device_t i2c_device_proto = { |
| .version = DEVICE_OPS_VERSION, |
| }; |
| |
| static zx_status_t dw_i2c_bind(void* ctx, zx_device_t* parent) { |
| printf("dw_i2c_bind\n"); |
| zx_status_t status; |
| |
| i2c_dw_t* i2c = calloc(1, sizeof(i2c_dw_t)); |
| if (!i2c) { |
| return ZX_ERR_NO_MEMORY; |
| } |
| |
| if ((status = device_get_protocol(parent, ZX_PROTOCOL_PLATFORM_DEV, &i2c->pdev)) != ZX_OK) { |
| zxlogf(ERROR, "dw_i2c_bind: ZX_PROTOCOL_PLATFORM_DEV not available\n"); |
| goto fail; |
| } |
| |
| platform_bus_protocol_t pbus; |
| if ((status = device_get_protocol(parent, ZX_PROTOCOL_PLATFORM_BUS, &pbus)) != ZX_OK) { |
| zxlogf(ERROR, "dw_i2c_bind: ZX_PROTOCOL_PLATFORM_BUS not available\n"); |
| goto fail; |
| } |
| |
| pdev_device_info_t info; |
| status = pdev_get_device_info(&i2c->pdev, &info); |
| if (status != ZX_OK) { |
| zxlogf(ERROR, "dw_i2c_bind: pdev_get_device_info failed\n"); |
| goto fail; |
| } |
| |
| if (info.mmio_count != info.irq_count) { |
| zxlogf(ERROR, "dw_i2c_bind: mmio_count %u does not matchirq_count %u\n", |
| info.mmio_count, info.irq_count); |
| status = ZX_ERR_INVALID_ARGS; |
| goto fail; |
| } |
| |
| i2c->i2c_devs = calloc(info.mmio_count, sizeof(i2c_dw_dev_t)); |
| if (!i2c->i2c_devs) { |
| free(i2c); |
| return ZX_ERR_NO_MEMORY; |
| } |
| i2c->i2c_dev_count = info.mmio_count; |
| |
| for (uint32_t i = 0; i < i2c->i2c_dev_count; i++) { |
| zx_status_t status = i2c_dw_init(i2c, i); |
| if (status != ZX_OK) { |
| zxlogf(ERROR, "dw_i2c_bind: dw_i2c_dev_init failed: %d\n", status); |
| goto fail; |
| } |
| } |
| |
| device_add_args_t args = { |
| .version = DEVICE_ADD_ARGS_VERSION, |
| .name = "dw-i2c", |
| .ctx = i2c, |
| .ops = &i2c_device_proto, |
| .flags = DEVICE_ADD_NON_BINDABLE, |
| }; |
| |
| status = device_add(parent, &args, &i2c->zxdev); |
| if (status != ZX_OK) { |
| zxlogf(ERROR, "dw_i2c_bind: device_add failed\n"); |
| goto fail; |
| } |
| |
| i2c->i2c.ops = &i2c_ops; |
| i2c->i2c.ctx = i2c; |
| pbus_register_protocol(&pbus, ZX_PROTOCOL_I2C_IMPL, &i2c->i2c, NULL, NULL); |
| |
| return ZX_OK; |
| |
| fail: |
| return status; |
| } |
| |
| static zx_driver_ops_t dw_i2c_driver_ops = { |
| .version = DRIVER_OPS_VERSION, |
| .bind = dw_i2c_bind, |
| }; |
| |
| ZIRCON_DRIVER_BEGIN(dw_i2c, dw_i2c_driver_ops, "zircon", "0.1", 4) |
| BI_ABORT_IF(NE, BIND_PROTOCOL, ZX_PROTOCOL_PLATFORM_DEV), |
| BI_ABORT_IF(NE, BIND_PLATFORM_DEV_VID, PDEV_VID_GENERIC), |
| BI_ABORT_IF(NE, BIND_PLATFORM_DEV_PID, PDEV_PID_GENERIC), |
| BI_MATCH_IF(EQ, BIND_PLATFORM_DEV_DID, PDEV_DID_DW_I2C), |
| ZIRCON_DRIVER_END(dw_i2c) |
