1b36ece832512c1a0afa54ff0a56d63492a1caf08Mingkai Hu/* 2b36ece832512c1a0afa54ff0a56d63492a1caf08Mingkai Hu * Freescale SPI/eSPI controller driver library. 3b36ece832512c1a0afa54ff0a56d63492a1caf08Mingkai Hu * 4b36ece832512c1a0afa54ff0a56d63492a1caf08Mingkai Hu * Maintainer: Kumar Gala 5b36ece832512c1a0afa54ff0a56d63492a1caf08Mingkai Hu * 6b36ece832512c1a0afa54ff0a56d63492a1caf08Mingkai Hu * Copyright (C) 2006 Polycom, Inc. 7b36ece832512c1a0afa54ff0a56d63492a1caf08Mingkai Hu * 8b36ece832512c1a0afa54ff0a56d63492a1caf08Mingkai Hu * CPM SPI and QE buffer descriptors mode support: 9b36ece832512c1a0afa54ff0a56d63492a1caf08Mingkai Hu * Copyright (c) 2009 MontaVista Software, Inc. 10b36ece832512c1a0afa54ff0a56d63492a1caf08Mingkai Hu * Author: Anton Vorontsov <avorontsov@ru.mvista.com> 11b36ece832512c1a0afa54ff0a56d63492a1caf08Mingkai Hu * 12b36ece832512c1a0afa54ff0a56d63492a1caf08Mingkai Hu * Copyright 2010 Freescale Semiconductor, Inc. 13b36ece832512c1a0afa54ff0a56d63492a1caf08Mingkai Hu * 14b36ece832512c1a0afa54ff0a56d63492a1caf08Mingkai Hu * This program is free software; you can redistribute it and/or modify it 15b36ece832512c1a0afa54ff0a56d63492a1caf08Mingkai Hu * under the terms of the GNU General Public License as published by the 16b36ece832512c1a0afa54ff0a56d63492a1caf08Mingkai Hu * Free Software Foundation; either version 2 of the License, or (at your 17b36ece832512c1a0afa54ff0a56d63492a1caf08Mingkai Hu * option) any later version. 18b36ece832512c1a0afa54ff0a56d63492a1caf08Mingkai Hu */ 19b36ece832512c1a0afa54ff0a56d63492a1caf08Mingkai Hu#include <linux/kernel.h> 20b36ece832512c1a0afa54ff0a56d63492a1caf08Mingkai Hu#include <linux/interrupt.h> 21b36ece832512c1a0afa54ff0a56d63492a1caf08Mingkai Hu#include <linux/fsl_devices.h> 22b36ece832512c1a0afa54ff0a56d63492a1caf08Mingkai Hu#include <linux/dma-mapping.h> 23b36ece832512c1a0afa54ff0a56d63492a1caf08Mingkai Hu#include <linux/mm.h> 24b36ece832512c1a0afa54ff0a56d63492a1caf08Mingkai Hu#include <linux/of_platform.h> 25b36ece832512c1a0afa54ff0a56d63492a1caf08Mingkai Hu#include <linux/of_spi.h> 26b36ece832512c1a0afa54ff0a56d63492a1caf08Mingkai Hu#include <sysdev/fsl_soc.h> 27b36ece832512c1a0afa54ff0a56d63492a1caf08Mingkai Hu 28ca632f556697d45d67ed5cada7cedf3ddfe0db4bGrant Likely#include "spi-fsl-lib.h" 29b36ece832512c1a0afa54ff0a56d63492a1caf08Mingkai Hu 30b36ece832512c1a0afa54ff0a56d63492a1caf08Mingkai Hu#define MPC8XXX_SPI_RX_BUF(type) \ 31b36ece832512c1a0afa54ff0a56d63492a1caf08Mingkai Huvoid mpc8xxx_spi_rx_buf_##type(u32 data, struct mpc8xxx_spi *mpc8xxx_spi) \ 32b36ece832512c1a0afa54ff0a56d63492a1caf08Mingkai Hu{ \ 33b36ece832512c1a0afa54ff0a56d63492a1caf08Mingkai Hu type *rx = mpc8xxx_spi->rx; \ 34b36ece832512c1a0afa54ff0a56d63492a1caf08Mingkai Hu *rx++ = (type)(data >> mpc8xxx_spi->rx_shift); \ 35b36ece832512c1a0afa54ff0a56d63492a1caf08Mingkai Hu mpc8xxx_spi->rx = rx; \ 36b36ece832512c1a0afa54ff0a56d63492a1caf08Mingkai Hu} 37b36ece832512c1a0afa54ff0a56d63492a1caf08Mingkai Hu 38b36ece832512c1a0afa54ff0a56d63492a1caf08Mingkai Hu#define MPC8XXX_SPI_TX_BUF(type) \ 39b36ece832512c1a0afa54ff0a56d63492a1caf08Mingkai Huu32 mpc8xxx_spi_tx_buf_##type(struct mpc8xxx_spi *mpc8xxx_spi) \ 40b36ece832512c1a0afa54ff0a56d63492a1caf08Mingkai Hu{ \ 41b36ece832512c1a0afa54ff0a56d63492a1caf08Mingkai Hu u32 data; \ 42b36ece832512c1a0afa54ff0a56d63492a1caf08Mingkai Hu const type *tx = mpc8xxx_spi->tx; \ 43b36ece832512c1a0afa54ff0a56d63492a1caf08Mingkai Hu if (!tx) \ 44b36ece832512c1a0afa54ff0a56d63492a1caf08Mingkai Hu return 0; \ 45b36ece832512c1a0afa54ff0a56d63492a1caf08Mingkai Hu data = *tx++ << mpc8xxx_spi->tx_shift; \ 46b36ece832512c1a0afa54ff0a56d63492a1caf08Mingkai Hu mpc8xxx_spi->tx = tx; \ 47b36ece832512c1a0afa54ff0a56d63492a1caf08Mingkai Hu return data; \ 48b36ece832512c1a0afa54ff0a56d63492a1caf08Mingkai Hu} 49b36ece832512c1a0afa54ff0a56d63492a1caf08Mingkai Hu 50b36ece832512c1a0afa54ff0a56d63492a1caf08Mingkai HuMPC8XXX_SPI_RX_BUF(u8) 51b36ece832512c1a0afa54ff0a56d63492a1caf08Mingkai HuMPC8XXX_SPI_RX_BUF(u16) 52b36ece832512c1a0afa54ff0a56d63492a1caf08Mingkai HuMPC8XXX_SPI_RX_BUF(u32) 53b36ece832512c1a0afa54ff0a56d63492a1caf08Mingkai HuMPC8XXX_SPI_TX_BUF(u8) 54b36ece832512c1a0afa54ff0a56d63492a1caf08Mingkai HuMPC8XXX_SPI_TX_BUF(u16) 55b36ece832512c1a0afa54ff0a56d63492a1caf08Mingkai HuMPC8XXX_SPI_TX_BUF(u32) 56b36ece832512c1a0afa54ff0a56d63492a1caf08Mingkai Hu 57b36ece832512c1a0afa54ff0a56d63492a1caf08Mingkai Hustruct mpc8xxx_spi_probe_info *to_of_pinfo(struct fsl_spi_platform_data *pdata) 58b36ece832512c1a0afa54ff0a56d63492a1caf08Mingkai Hu{ 59b36ece832512c1a0afa54ff0a56d63492a1caf08Mingkai Hu return container_of(pdata, struct mpc8xxx_spi_probe_info, pdata); 60b36ece832512c1a0afa54ff0a56d63492a1caf08Mingkai Hu} 61b36ece832512c1a0afa54ff0a56d63492a1caf08Mingkai Hu 62b36ece832512c1a0afa54ff0a56d63492a1caf08Mingkai Huvoid mpc8xxx_spi_work(struct work_struct *work) 63b36ece832512c1a0afa54ff0a56d63492a1caf08Mingkai Hu{ 64b36ece832512c1a0afa54ff0a56d63492a1caf08Mingkai Hu struct mpc8xxx_spi *mpc8xxx_spi = container_of(work, struct mpc8xxx_spi, 65b36ece832512c1a0afa54ff0a56d63492a1caf08Mingkai Hu work); 66b36ece832512c1a0afa54ff0a56d63492a1caf08Mingkai Hu 67b36ece832512c1a0afa54ff0a56d63492a1caf08Mingkai Hu spin_lock_irq(&mpc8xxx_spi->lock); 68b36ece832512c1a0afa54ff0a56d63492a1caf08Mingkai Hu while (!list_empty(&mpc8xxx_spi->queue)) { 69b36ece832512c1a0afa54ff0a56d63492a1caf08Mingkai Hu struct spi_message *m = container_of(mpc8xxx_spi->queue.next, 70b36ece832512c1a0afa54ff0a56d63492a1caf08Mingkai Hu struct spi_message, queue); 71b36ece832512c1a0afa54ff0a56d63492a1caf08Mingkai Hu 72b36ece832512c1a0afa54ff0a56d63492a1caf08Mingkai Hu list_del_init(&m->queue); 73b36ece832512c1a0afa54ff0a56d63492a1caf08Mingkai Hu spin_unlock_irq(&mpc8xxx_spi->lock); 74b36ece832512c1a0afa54ff0a56d63492a1caf08Mingkai Hu 75b36ece832512c1a0afa54ff0a56d63492a1caf08Mingkai Hu if (mpc8xxx_spi->spi_do_one_msg) 76b36ece832512c1a0afa54ff0a56d63492a1caf08Mingkai Hu mpc8xxx_spi->spi_do_one_msg(m); 77b36ece832512c1a0afa54ff0a56d63492a1caf08Mingkai Hu 78b36ece832512c1a0afa54ff0a56d63492a1caf08Mingkai Hu spin_lock_irq(&mpc8xxx_spi->lock); 79b36ece832512c1a0afa54ff0a56d63492a1caf08Mingkai Hu } 80b36ece832512c1a0afa54ff0a56d63492a1caf08Mingkai Hu spin_unlock_irq(&mpc8xxx_spi->lock); 81b36ece832512c1a0afa54ff0a56d63492a1caf08Mingkai Hu} 82b36ece832512c1a0afa54ff0a56d63492a1caf08Mingkai Hu 83b36ece832512c1a0afa54ff0a56d63492a1caf08Mingkai Huint mpc8xxx_spi_transfer(struct spi_device *spi, 84b36ece832512c1a0afa54ff0a56d63492a1caf08Mingkai Hu struct spi_message *m) 85b36ece832512c1a0afa54ff0a56d63492a1caf08Mingkai Hu{ 86b36ece832512c1a0afa54ff0a56d63492a1caf08Mingkai Hu struct mpc8xxx_spi *mpc8xxx_spi = spi_master_get_devdata(spi->master); 87b36ece832512c1a0afa54ff0a56d63492a1caf08Mingkai Hu unsigned long flags; 88b36ece832512c1a0afa54ff0a56d63492a1caf08Mingkai Hu 89b36ece832512c1a0afa54ff0a56d63492a1caf08Mingkai Hu m->actual_length = 0; 90b36ece832512c1a0afa54ff0a56d63492a1caf08Mingkai Hu m->status = -EINPROGRESS; 91b36ece832512c1a0afa54ff0a56d63492a1caf08Mingkai Hu 92b36ece832512c1a0afa54ff0a56d63492a1caf08Mingkai Hu spin_lock_irqsave(&mpc8xxx_spi->lock, flags); 93b36ece832512c1a0afa54ff0a56d63492a1caf08Mingkai Hu list_add_tail(&m->queue, &mpc8xxx_spi->queue); 94b36ece832512c1a0afa54ff0a56d63492a1caf08Mingkai Hu queue_work(mpc8xxx_spi->workqueue, &mpc8xxx_spi->work); 95b36ece832512c1a0afa54ff0a56d63492a1caf08Mingkai Hu spin_unlock_irqrestore(&mpc8xxx_spi->lock, flags); 96b36ece832512c1a0afa54ff0a56d63492a1caf08Mingkai Hu 97b36ece832512c1a0afa54ff0a56d63492a1caf08Mingkai Hu return 0; 98b36ece832512c1a0afa54ff0a56d63492a1caf08Mingkai Hu} 99b36ece832512c1a0afa54ff0a56d63492a1caf08Mingkai Hu 100b36ece832512c1a0afa54ff0a56d63492a1caf08Mingkai Huvoid mpc8xxx_spi_cleanup(struct spi_device *spi) 101b36ece832512c1a0afa54ff0a56d63492a1caf08Mingkai Hu{ 102b36ece832512c1a0afa54ff0a56d63492a1caf08Mingkai Hu kfree(spi->controller_state); 103b36ece832512c1a0afa54ff0a56d63492a1caf08Mingkai Hu} 104b36ece832512c1a0afa54ff0a56d63492a1caf08Mingkai Hu 105b36ece832512c1a0afa54ff0a56d63492a1caf08Mingkai Huconst char *mpc8xxx_spi_strmode(unsigned int flags) 106b36ece832512c1a0afa54ff0a56d63492a1caf08Mingkai Hu{ 107b36ece832512c1a0afa54ff0a56d63492a1caf08Mingkai Hu if (flags & SPI_QE_CPU_MODE) { 108b36ece832512c1a0afa54ff0a56d63492a1caf08Mingkai Hu return "QE CPU"; 109b36ece832512c1a0afa54ff0a56d63492a1caf08Mingkai Hu } else if (flags & SPI_CPM_MODE) { 110b36ece832512c1a0afa54ff0a56d63492a1caf08Mingkai Hu if (flags & SPI_QE) 111b36ece832512c1a0afa54ff0a56d63492a1caf08Mingkai Hu return "QE"; 112b36ece832512c1a0afa54ff0a56d63492a1caf08Mingkai Hu else if (flags & SPI_CPM2) 113b36ece832512c1a0afa54ff0a56d63492a1caf08Mingkai Hu return "CPM2"; 114b36ece832512c1a0afa54ff0a56d63492a1caf08Mingkai Hu else 115b36ece832512c1a0afa54ff0a56d63492a1caf08Mingkai Hu return "CPM1"; 116b36ece832512c1a0afa54ff0a56d63492a1caf08Mingkai Hu } 117b36ece832512c1a0afa54ff0a56d63492a1caf08Mingkai Hu return "CPU"; 118b36ece832512c1a0afa54ff0a56d63492a1caf08Mingkai Hu} 119b36ece832512c1a0afa54ff0a56d63492a1caf08Mingkai Hu 120b36ece832512c1a0afa54ff0a56d63492a1caf08Mingkai Huint mpc8xxx_spi_probe(struct device *dev, struct resource *mem, 121b36ece832512c1a0afa54ff0a56d63492a1caf08Mingkai Hu unsigned int irq) 122b36ece832512c1a0afa54ff0a56d63492a1caf08Mingkai Hu{ 123b36ece832512c1a0afa54ff0a56d63492a1caf08Mingkai Hu struct fsl_spi_platform_data *pdata = dev->platform_data; 124b36ece832512c1a0afa54ff0a56d63492a1caf08Mingkai Hu struct spi_master *master; 125b36ece832512c1a0afa54ff0a56d63492a1caf08Mingkai Hu struct mpc8xxx_spi *mpc8xxx_spi; 126b36ece832512c1a0afa54ff0a56d63492a1caf08Mingkai Hu int ret = 0; 127b36ece832512c1a0afa54ff0a56d63492a1caf08Mingkai Hu 128b36ece832512c1a0afa54ff0a56d63492a1caf08Mingkai Hu master = dev_get_drvdata(dev); 129b36ece832512c1a0afa54ff0a56d63492a1caf08Mingkai Hu 130b36ece832512c1a0afa54ff0a56d63492a1caf08Mingkai Hu /* the spi->mode bits understood by this driver: */ 131b36ece832512c1a0afa54ff0a56d63492a1caf08Mingkai Hu master->mode_bits = SPI_CPOL | SPI_CPHA | SPI_CS_HIGH 132b36ece832512c1a0afa54ff0a56d63492a1caf08Mingkai Hu | SPI_LSB_FIRST | SPI_LOOP; 133b36ece832512c1a0afa54ff0a56d63492a1caf08Mingkai Hu 134b36ece832512c1a0afa54ff0a56d63492a1caf08Mingkai Hu master->transfer = mpc8xxx_spi_transfer; 135b36ece832512c1a0afa54ff0a56d63492a1caf08Mingkai Hu master->cleanup = mpc8xxx_spi_cleanup; 136b36ece832512c1a0afa54ff0a56d63492a1caf08Mingkai Hu master->dev.of_node = dev->of_node; 137b36ece832512c1a0afa54ff0a56d63492a1caf08Mingkai Hu 138b36ece832512c1a0afa54ff0a56d63492a1caf08Mingkai Hu mpc8xxx_spi = spi_master_get_devdata(master); 139b36ece832512c1a0afa54ff0a56d63492a1caf08Mingkai Hu mpc8xxx_spi->dev = dev; 140b36ece832512c1a0afa54ff0a56d63492a1caf08Mingkai Hu mpc8xxx_spi->get_rx = mpc8xxx_spi_rx_buf_u8; 141b36ece832512c1a0afa54ff0a56d63492a1caf08Mingkai Hu mpc8xxx_spi->get_tx = mpc8xxx_spi_tx_buf_u8; 142b36ece832512c1a0afa54ff0a56d63492a1caf08Mingkai Hu mpc8xxx_spi->flags = pdata->flags; 143b36ece832512c1a0afa54ff0a56d63492a1caf08Mingkai Hu mpc8xxx_spi->spibrg = pdata->sysclk; 144b36ece832512c1a0afa54ff0a56d63492a1caf08Mingkai Hu mpc8xxx_spi->irq = irq; 145b36ece832512c1a0afa54ff0a56d63492a1caf08Mingkai Hu 146b36ece832512c1a0afa54ff0a56d63492a1caf08Mingkai Hu mpc8xxx_spi->rx_shift = 0; 147b36ece832512c1a0afa54ff0a56d63492a1caf08Mingkai Hu mpc8xxx_spi->tx_shift = 0; 148b36ece832512c1a0afa54ff0a56d63492a1caf08Mingkai Hu 149b36ece832512c1a0afa54ff0a56d63492a1caf08Mingkai Hu init_completion(&mpc8xxx_spi->done); 150b36ece832512c1a0afa54ff0a56d63492a1caf08Mingkai Hu 151b36ece832512c1a0afa54ff0a56d63492a1caf08Mingkai Hu master->bus_num = pdata->bus_num; 152b36ece832512c1a0afa54ff0a56d63492a1caf08Mingkai Hu master->num_chipselect = pdata->max_chipselect; 153b36ece832512c1a0afa54ff0a56d63492a1caf08Mingkai Hu 154b36ece832512c1a0afa54ff0a56d63492a1caf08Mingkai Hu spin_lock_init(&mpc8xxx_spi->lock); 155b36ece832512c1a0afa54ff0a56d63492a1caf08Mingkai Hu init_completion(&mpc8xxx_spi->done); 156b36ece832512c1a0afa54ff0a56d63492a1caf08Mingkai Hu INIT_WORK(&mpc8xxx_spi->work, mpc8xxx_spi_work); 157b36ece832512c1a0afa54ff0a56d63492a1caf08Mingkai Hu INIT_LIST_HEAD(&mpc8xxx_spi->queue); 158b36ece832512c1a0afa54ff0a56d63492a1caf08Mingkai Hu 159b36ece832512c1a0afa54ff0a56d63492a1caf08Mingkai Hu mpc8xxx_spi->workqueue = create_singlethread_workqueue( 160b36ece832512c1a0afa54ff0a56d63492a1caf08Mingkai Hu dev_name(master->dev.parent)); 161b36ece832512c1a0afa54ff0a56d63492a1caf08Mingkai Hu if (mpc8xxx_spi->workqueue == NULL) { 162b36ece832512c1a0afa54ff0a56d63492a1caf08Mingkai Hu ret = -EBUSY; 163b36ece832512c1a0afa54ff0a56d63492a1caf08Mingkai Hu goto err; 164b36ece832512c1a0afa54ff0a56d63492a1caf08Mingkai Hu } 165b36ece832512c1a0afa54ff0a56d63492a1caf08Mingkai Hu 166b36ece832512c1a0afa54ff0a56d63492a1caf08Mingkai Hu return 0; 167b36ece832512c1a0afa54ff0a56d63492a1caf08Mingkai Hu 168b36ece832512c1a0afa54ff0a56d63492a1caf08Mingkai Huerr: 169b36ece832512c1a0afa54ff0a56d63492a1caf08Mingkai Hu return ret; 170b36ece832512c1a0afa54ff0a56d63492a1caf08Mingkai Hu} 171b36ece832512c1a0afa54ff0a56d63492a1caf08Mingkai Hu 172b36ece832512c1a0afa54ff0a56d63492a1caf08Mingkai Huint __devexit mpc8xxx_spi_remove(struct device *dev) 173b36ece832512c1a0afa54ff0a56d63492a1caf08Mingkai Hu{ 174b36ece832512c1a0afa54ff0a56d63492a1caf08Mingkai Hu struct mpc8xxx_spi *mpc8xxx_spi; 175b36ece832512c1a0afa54ff0a56d63492a1caf08Mingkai Hu struct spi_master *master; 176b36ece832512c1a0afa54ff0a56d63492a1caf08Mingkai Hu 177b36ece832512c1a0afa54ff0a56d63492a1caf08Mingkai Hu master = dev_get_drvdata(dev); 178b36ece832512c1a0afa54ff0a56d63492a1caf08Mingkai Hu mpc8xxx_spi = spi_master_get_devdata(master); 179b36ece832512c1a0afa54ff0a56d63492a1caf08Mingkai Hu 180b36ece832512c1a0afa54ff0a56d63492a1caf08Mingkai Hu flush_workqueue(mpc8xxx_spi->workqueue); 181b36ece832512c1a0afa54ff0a56d63492a1caf08Mingkai Hu destroy_workqueue(mpc8xxx_spi->workqueue); 182b36ece832512c1a0afa54ff0a56d63492a1caf08Mingkai Hu spi_unregister_master(master); 183b36ece832512c1a0afa54ff0a56d63492a1caf08Mingkai Hu 184b36ece832512c1a0afa54ff0a56d63492a1caf08Mingkai Hu free_irq(mpc8xxx_spi->irq, mpc8xxx_spi); 185b36ece832512c1a0afa54ff0a56d63492a1caf08Mingkai Hu 186b36ece832512c1a0afa54ff0a56d63492a1caf08Mingkai Hu if (mpc8xxx_spi->spi_remove) 187b36ece832512c1a0afa54ff0a56d63492a1caf08Mingkai Hu mpc8xxx_spi->spi_remove(mpc8xxx_spi); 188b36ece832512c1a0afa54ff0a56d63492a1caf08Mingkai Hu 189b36ece832512c1a0afa54ff0a56d63492a1caf08Mingkai Hu return 0; 190b36ece832512c1a0afa54ff0a56d63492a1caf08Mingkai Hu} 191b36ece832512c1a0afa54ff0a56d63492a1caf08Mingkai Hu 19218d306d1375696b0e6b5b39e4744d7fa2ad5e170Grant Likelyint __devinit of_mpc8xxx_spi_probe(struct platform_device *ofdev) 193b36ece832512c1a0afa54ff0a56d63492a1caf08Mingkai Hu{ 194b36ece832512c1a0afa54ff0a56d63492a1caf08Mingkai Hu struct device *dev = &ofdev->dev; 195b36ece832512c1a0afa54ff0a56d63492a1caf08Mingkai Hu struct device_node *np = ofdev->dev.of_node; 196b36ece832512c1a0afa54ff0a56d63492a1caf08Mingkai Hu struct mpc8xxx_spi_probe_info *pinfo; 197b36ece832512c1a0afa54ff0a56d63492a1caf08Mingkai Hu struct fsl_spi_platform_data *pdata; 198b36ece832512c1a0afa54ff0a56d63492a1caf08Mingkai Hu const void *prop; 199b36ece832512c1a0afa54ff0a56d63492a1caf08Mingkai Hu int ret = -ENOMEM; 200b36ece832512c1a0afa54ff0a56d63492a1caf08Mingkai Hu 201b36ece832512c1a0afa54ff0a56d63492a1caf08Mingkai Hu pinfo = kzalloc(sizeof(*pinfo), GFP_KERNEL); 202b36ece832512c1a0afa54ff0a56d63492a1caf08Mingkai Hu if (!pinfo) 203b36ece832512c1a0afa54ff0a56d63492a1caf08Mingkai Hu return -ENOMEM; 204b36ece832512c1a0afa54ff0a56d63492a1caf08Mingkai Hu 205b36ece832512c1a0afa54ff0a56d63492a1caf08Mingkai Hu pdata = &pinfo->pdata; 206b36ece832512c1a0afa54ff0a56d63492a1caf08Mingkai Hu dev->platform_data = pdata; 207b36ece832512c1a0afa54ff0a56d63492a1caf08Mingkai Hu 208b36ece832512c1a0afa54ff0a56d63492a1caf08Mingkai Hu /* Allocate bus num dynamically. */ 209b36ece832512c1a0afa54ff0a56d63492a1caf08Mingkai Hu pdata->bus_num = -1; 210b36ece832512c1a0afa54ff0a56d63492a1caf08Mingkai Hu 211b36ece832512c1a0afa54ff0a56d63492a1caf08Mingkai Hu /* SPI controller is either clocked from QE or SoC clock. */ 212b36ece832512c1a0afa54ff0a56d63492a1caf08Mingkai Hu pdata->sysclk = get_brgfreq(); 213b36ece832512c1a0afa54ff0a56d63492a1caf08Mingkai Hu if (pdata->sysclk == -1) { 214b36ece832512c1a0afa54ff0a56d63492a1caf08Mingkai Hu pdata->sysclk = fsl_get_sys_freq(); 215b36ece832512c1a0afa54ff0a56d63492a1caf08Mingkai Hu if (pdata->sysclk == -1) { 216b36ece832512c1a0afa54ff0a56d63492a1caf08Mingkai Hu ret = -ENODEV; 217b36ece832512c1a0afa54ff0a56d63492a1caf08Mingkai Hu goto err; 218b36ece832512c1a0afa54ff0a56d63492a1caf08Mingkai Hu } 219b36ece832512c1a0afa54ff0a56d63492a1caf08Mingkai Hu } 220b36ece832512c1a0afa54ff0a56d63492a1caf08Mingkai Hu 221b36ece832512c1a0afa54ff0a56d63492a1caf08Mingkai Hu prop = of_get_property(np, "mode", NULL); 222b36ece832512c1a0afa54ff0a56d63492a1caf08Mingkai Hu if (prop && !strcmp(prop, "cpu-qe")) 223b36ece832512c1a0afa54ff0a56d63492a1caf08Mingkai Hu pdata->flags = SPI_QE_CPU_MODE; 224b36ece832512c1a0afa54ff0a56d63492a1caf08Mingkai Hu else if (prop && !strcmp(prop, "qe")) 225b36ece832512c1a0afa54ff0a56d63492a1caf08Mingkai Hu pdata->flags = SPI_CPM_MODE | SPI_QE; 226b36ece832512c1a0afa54ff0a56d63492a1caf08Mingkai Hu else if (of_device_is_compatible(np, "fsl,cpm2-spi")) 227b36ece832512c1a0afa54ff0a56d63492a1caf08Mingkai Hu pdata->flags = SPI_CPM_MODE | SPI_CPM2; 228b36ece832512c1a0afa54ff0a56d63492a1caf08Mingkai Hu else if (of_device_is_compatible(np, "fsl,cpm1-spi")) 229b36ece832512c1a0afa54ff0a56d63492a1caf08Mingkai Hu pdata->flags = SPI_CPM_MODE | SPI_CPM1; 230b36ece832512c1a0afa54ff0a56d63492a1caf08Mingkai Hu 231b36ece832512c1a0afa54ff0a56d63492a1caf08Mingkai Hu return 0; 232b36ece832512c1a0afa54ff0a56d63492a1caf08Mingkai Hu 233b36ece832512c1a0afa54ff0a56d63492a1caf08Mingkai Huerr: 234b36ece832512c1a0afa54ff0a56d63492a1caf08Mingkai Hu kfree(pinfo); 235b36ece832512c1a0afa54ff0a56d63492a1caf08Mingkai Hu return ret; 236b36ece832512c1a0afa54ff0a56d63492a1caf08Mingkai Hu} 237