diff options
Diffstat (limited to 'target/linux/coldfire/patches/080-mcfv4e_dspi_update.patch')
-rw-r--r-- | target/linux/coldfire/patches/080-mcfv4e_dspi_update.patch | 1378 |
1 files changed, 1378 insertions, 0 deletions
diff --git a/target/linux/coldfire/patches/080-mcfv4e_dspi_update.patch b/target/linux/coldfire/patches/080-mcfv4e_dspi_update.patch new file mode 100644 index 000000000..a15761673 --- /dev/null +++ b/target/linux/coldfire/patches/080-mcfv4e_dspi_update.patch @@ -0,0 +1,1378 @@ +From 771f4741de2cd8a103d96cd1e8281926448ff56d Mon Sep 17 00:00:00 2001 +From: Kurt Mahan <kmahan@freescale.com> +Date: Tue, 15 Jul 2008 11:44:08 -0600 +Subject: [PATCH] Fix DSPI driver. + +Update to latest Matt Coldfire driver. Fix timing issues with +M547x/M548x END-OF-QUEUE notification. + +LTIBName: mcfv4e-dspi-update +Signed-off-by: Kurt Mahan <kmahan@freescale.com> +--- + arch/m68k/coldfire/m547x_8x-devices.c | 35 +- + drivers/spi/Kconfig | 6 + + drivers/spi/Makefile | 2 +- + drivers/spi/dspi_mcf.c | 1217 +++++++++++++++++++++++++++++++++ + include/asm-m68k/mcfdspi.h | 48 ++ + 5 files changed, 1296 insertions(+), 12 deletions(-) + create mode 100644 drivers/spi/dspi_mcf.c + create mode 100644 include/asm-m68k/mcfdspi.h + +--- a/arch/m68k/coldfire/m547x_8x-devices.c ++++ b/arch/m68k/coldfire/m547x_8x-devices.c +@@ -26,26 +26,40 @@ + */ + + /* number of supported SPI selects */ +-#define SPI_NUM_CHIPSELECTS 4 ++#define SPI_NUM_CHIPSELECTS 8 + + void coldfire_spi_cs_control(u8 cs, u8 command) + { + /* nothing special required */ + } + ++#if defined(CONFIG_SPI_SPIDEV) || defined(CONFIG_SPI_SPIDEV_MODULE) ++static struct coldfire_spi_chip spidev_chip_info = { ++ .bits_per_word = 8, ++}; ++#endif ++ + static struct spi_board_info spi_board_info[] = { +- /* no board info */ ++#if defined(CONFIG_SPI_SPIDEV) || defined(CONFIG_SPI_SPIDEV_MODULE) ++ { ++ .modalias = "spidev", ++ .max_speed_hz = 16000000, /* max clk (SCK) speed in HZ */ ++ .bus_num = 1, ++ .chip_select = 0, /* CS0 */ ++ .controller_data = &spidev_chip_info, ++ } ++#endif + }; + + static int spi_irq_list[] = { +- /* IRQ, ICR Offset, ICR Val, Mask */ +- 64 + ISC_DSPI_OVRFW, 0, 0, 0, +- 64 + ISC_DSPI_RFOF, 0, 0, 0, +- 64 + ISC_DSPI_RFDF, 0, 0, 0, +- 64 + ISC_DSPI_TFUF, 0, 0, 0, +- 64 + ISC_DSPI_TCF, 0, 0, 0, +- 64 + ISC_DSPI_TFFF, 0, 0, 0, +- 64 + ISC_DSPI_EOQF, 0, 0, 0, ++ /* IRQ, ICR Offset, ICR Val,Mask */ ++ 64 + ISC_DSPI_OVRFW, ISC_DSPI_OVRFW, 0x18, 0, ++ 64 + ISC_DSPI_RFOF, ISC_DSPI_RFOF, 0x18, 0, ++ 64 + ISC_DSPI_RFDF, ISC_DSPI_RFDF, 0x18, 0, ++ 64 + ISC_DSPI_TFUF, ISC_DSPI_TFUF, 0x18, 0, ++ 64 + ISC_DSPI_TCF, ISC_DSPI_TCF, 0x18, 0, ++ 64 + ISC_DSPI_TFFF, ISC_DSPI_TFFF, 0x18, 0, ++ 64 + ISC_DSPI_EOQF, ISC_DSPI_EOQF, 0x18, 0, + 0,0,0,0, + }; + +@@ -120,7 +134,6 @@ static int __init m547x_8x_spi_init(void + /* register device */ + retval = platform_device_register(&coldfire_spi); + if (retval < 0) { +- printk(KERN_ERR "SPI-m547x_8x: platform_device_register failed with code=%d\n", retval); + goto out; + } + +--- a/drivers/spi/Kconfig ++++ b/drivers/spi/Kconfig +@@ -130,6 +130,12 @@ config SPI_COLDFIRE + Tested with the 5282 processor, but should also work with other + Coldfire variants. + ++config SPI_DSPI ++ tristate "Coldfire DSPI" ++ depends on SPI_MASTER && COLDFIRE ++ help ++ SPI driver for Coldfire DSPI driver only. ++ + config SPI_COLDFIRE_DSPI_EDMA + boolean "Coldfire DSPI master driver uses eDMA" + depends on SPI_MASTER && COLDFIRE && SPI_COLDFIRE && EXPERIMENTAL && COLDFIRE_EDMA +--- a/drivers/spi/Makefile ++++ b/drivers/spi/Makefile +@@ -19,7 +19,7 @@ obj-$(CONFIG_SPI_BITBANG) += spi_bitban + obj-$(CONFIG_SPI_AU1550) += au1550_spi.o + obj-$(CONFIG_SPI_BUTTERFLY) += spi_butterfly.o + # obj-$(CONFIG_SPI_COLDFIRE) += spi_coldfire.o spi-m5445x.o +-obj-$(CONFIG_SPI_COLDFIRE) += spi_coldfire.o ++obj-$(CONFIG_SPI_DSPI) += dspi_mcf.o + obj-$(CONFIG_SPI_GPIO) += spi_gpio.o + obj-$(CONFIG_SPI_IMX) += spi_imx.o + obj-$(CONFIG_SPI_LM70_LLP) += spi_lm70llp.o +--- /dev/null ++++ b/drivers/spi/dspi_mcf.c +@@ -0,0 +1,1217 @@ ++/* ++ * dspi_mcf.c - DSPI controller for ColdFire processors ++ * ++ * ++ * Matt Waddel Matt.Waddel@freescale.com ++ * Copyright Freescale Semiconductor, Inc. 2008 ++ * ++ * M547x/M548x changes by Kurt Mahan kmahan@freescale.com ++ * Copyright Freescale Semiconductor, Inc. 2008 ++ * ++ * Based on spi_coldfire.c done by: ++ * Andrey Butok ++ * Yaroslav Vinogradov ++ * Copyright Freescale Semiconductor, Inc. 2006-2007 ++ * Mike Lavender (mike@steroidmicros) ++ * (C) Copyright 2005, Intec Automation, ++ * ++ * This program is free software; you can redistribute it and/or modify it ++ * under the terms of the GNU General Public License as published by the ++ * Free Software Foundation; either version 2 of the License, or (at your ++ * option) any later version. ++ * ++ * This program is distributed in the hope that it will be useful, ++ * but WITHOUT ANY WARRANTY; without even the implied warranty of ++ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the ++ * GNU General Public License for more details. ++ * ++ * You should have received a copy of the GNU General Public License ++ * along with this program; if not, write to the Free Software ++ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA ++ * ++ *************************************************************************** ++ * Changes: ++ * v0.002 M547x/M548x support. ++ * v0.001 Initial version. Coldfire DSPI master driver. ++ ****************************************************************************/ ++ ++/* ++ * Includes ++ */ ++ ++#include <linux/autoconf.h> ++#include <linux/init.h> ++#include <linux/module.h> ++#include <linux/device.h> ++#include <linux/interrupt.h> ++#include <linux/platform_device.h> ++#include <linux/spi/spi.h> ++#include <linux/workqueue.h> ++#include <linux/delay.h> ++#include <asm/mcfsim.h> ++#include <asm/mcfqspi.h> ++#include <asm/coldfire.h> ++#include <linux/io.h> ++#include <asm/mcfdspi.h> ++#include <linux/dma-mapping.h> ++ ++#undef DSPI_COLDFIRE_DEBUG ++ ++#ifdef DSPI_COLDFIRE_DEBUG ++#define DBG(fmt, args...) \ ++ printk(KERN_INFO "[%s] " fmt , __FUNCTION__, ## args) ++#else ++#define DBG(fmt, args...) do {} while (0) ++#endif ++ ++#if defined(CONFIG_M54455) ++#include <asm/mcf5445x_dspi.h> ++#if defined(CONFIG_SPI_COLDFIRE_DSPI_EDMA) ++ #include <asm/mcf5445x_edma.h> ++#endif ++#endif ++ ++#if defined(CONFIG_M547X_8X) ++#include <asm/virtconvert.h> ++#include <asm/m5485dspi.h> ++#endif ++ ++#if defined(CONFIG_SPI_COLDFIRE_DSPI_EDMA) ++#include <asm/mcf_edma.h> ++#define SPI_DSPI_EDMA ++#define EDMA_BUFSIZE_KMALLOC (DSPI_FIFO_SIZE*4) ++#define DSPI_DMA_RX_TCD MCF_EDMA_CHAN_DSPI_RX ++#define DSPI_DMA_TX_TCD MCF_EDMA_CHAN_DSPI_TX ++#endif ++ ++#define DSPI_BITS MCF_DSPI_DCTAR_FMSZ(0xF) ++#define DSPI_BITS_16 MCF_DSPI_DCTAR_FMSZ(0xF) ++#define DSPI_BITS_8 MCF_DSPI_DCTAR_FMSZ(0x7) ++#define DSPI_FIFO_SIZE 16 ++ ++#define DRIVER_NAME "Coldfire DSPI" ++ ++/****************************************************************************/ ++ ++/* ++ * Local constants and macros ++ */ ++ ++#define START_STATE ((void *)0) ++#define RUNNING_STATE ((void *)1) ++#define DONE_STATE ((void *)2) ++#define ERROR_STATE ((void *)-1) ++ ++#define QUEUE_RUNNING 0 ++#define QUEUE_STOPPED 1 ++ ++/****************************************************************************/ ++ ++/* ++ * Local Data Structures ++ */ ++ ++struct DSPI_MCR { ++ unsigned master:1; ++ unsigned cont_scke:1; ++ unsigned dconf:2; ++ unsigned frz:1; ++ unsigned mtfe:1; ++ unsigned pcsse:1; ++ unsigned rooe:1; ++ unsigned pcsis:8; ++ unsigned reserved15:1; ++ unsigned mdis:1; ++ unsigned dis_tx:1; ++ unsigned dis_rxf:1; ++ unsigned clr_tx:1; ++ unsigned clr_rxf:1; ++ unsigned smpl_pt:2; ++ unsigned reserved71:7; ++ unsigned halt:1; ++}; ++ ++struct DSPI_CTAR { ++ unsigned dbr:1; ++ unsigned fmsz:4; ++ unsigned cpol:1; ++ unsigned cpha:1; ++ unsigned lsbfe:1; ++ unsigned pcssck:2; ++ unsigned pasc:2; ++ unsigned pdt:2; ++ unsigned pbr:2; ++ unsigned cssck:4; ++ unsigned asc:4; ++ unsigned dt:4; ++ unsigned br:4; ++}; ++ ++struct chip_data { ++ /* dspi data */ ++ union { ++ u32 mcr_val; ++ struct DSPI_MCR mcr; ++ }; ++ union { ++ u32 ctar_val; ++ struct DSPI_CTAR ctar; ++ }; ++ u16 void_write_data; ++}; ++ ++ ++struct driver_data { ++ /* Driver model hookup */ ++ struct platform_device *pdev; ++ ++ /* SPI framework hookup */ ++ struct spi_master *master; ++ ++ /* Driver message queue */ ++ struct workqueue_struct *workqueue; ++ struct work_struct pump_messages; ++ spinlock_t lock; /* lock */ ++ struct list_head queue; ++ int busy; ++ int run; ++ ++ /* Message Transfer pump */ ++ struct tasklet_struct pump_transfers; ++ ++ /* Current message transfer state info */ ++ struct spi_message *cur_msg; ++ struct spi_transfer *cur_transfer; ++ struct chip_data *cur_chip; ++ size_t len; ++ void *tx; ++ void *tx_end; ++ void *rx; ++ void *rx_end; ++ char flags; ++#define TRAN_STATE_RX_VOID 0x01 ++#define TRAN_STATE_TX_VOID 0x02 ++#define TRAN_STATE_WORD_ODD_NUM 0x04 ++ u8 cs; ++ u16 void_write_data; ++ unsigned cs_change:1; ++ ++ u32 trans_cnt; ++ u32 wce_cnt; ++ u32 abrt_cnt; ++ u32 *mcr; /* DSPI MCR register */ ++ u32 *ctar; /* DSPI CTAR register */ ++ u32 *dspi_dtfr; /* DSPI DTFR register */ ++ u32 *dspi_drfr; /* DSPI DRFR register */ ++ u32 *dspi_rser; /* DSPI RSER register */ ++ u32 *dspi_sr; /* DSPI status register */ ++ ++#if defined(SPI_DSPI_EDMA) ++ void *edma_tx_buf; ++ void *edma_rx_buf; ++#endif ++ ++#if defined(CONFIG_M532x) || defined(CONFIG_M537x) ++ u16 *par; /* Pin assignment register */ ++#else ++ u8 *par; /* Pin assignment register */ ++#endif ++ u8 *int_icr; /* Interrupt level and priority register */ ++ u32 *int_mr; /* Interrupt mask register */ ++ void (*cs_control)(u8 cs, u8 command); ++}; ++ ++#define DSPI_CS(cs) ((1<<(cs))<<16) ++ ++/****************************************************************************/ ++ ++/* ++ * SPI local functions ++ */ ++ ++static void *next_transfer(struct driver_data *drv_data) ++{ ++ struct spi_message *msg = drv_data->cur_msg; ++ struct spi_transfer *trans = drv_data->cur_transfer; ++ ++ DBG("\n"); ++ /* Move to next transfer */ ++ if (trans->transfer_list.next != &msg->transfers) { ++ drv_data->cur_transfer = list_entry(trans->transfer_list.next, ++ struct spi_transfer, ++ transfer_list); ++ ++ if (drv_data->cur_transfer->transfer_list.next ++ == &msg->transfers) /* last transfer */ ++ drv_data->cur_transfer->cs_change = 1; ++ ++ return RUNNING_STATE; ++ } else ++ return DONE_STATE; ++} ++ ++ ++static inline int is_word_transfer(struct driver_data *drv_data) ++{ ++ return ((*(drv_data->ctar+drv_data->cs) & DSPI_BITS_16) == ++ DSPI_BITS_8) ? 0 : 1; ++} ++ ++static inline void set_8bit_transfer_mode(struct driver_data *drv_data) ++{ ++ DBG("\n"); ++ *(drv_data->ctar+drv_data->cs) = ++ (*(drv_data->ctar + drv_data->cs) & ~DSPI_BITS) | DSPI_BITS_8; ++} ++ ++static inline void set_16bit_transfer_mode(struct driver_data *drv_data) ++{ ++ DBG("\n"); ++ *(drv_data->ctar+drv_data->cs) = ++ (*(drv_data->ctar + drv_data->cs) & ~DSPI_BITS) | DSPI_BITS_16; ++} ++ ++static unsigned char hz_to_spi_baud(int pbr, int dbr, int speed_hz) ++{ ++ int pbr_tbl[4] = {2, 3, 5, 7}; /* Valid baud rate pre-scaler values */ ++ int brs[16] = { 2, 4, 6, 8, ++ 16, 32, 64, 128, ++ 256, 512, 1024, 2048, ++ 4096, 8192, 16384, 32768 }; ++ int temp, index = 0; ++ ++ if ((pbr < 0) || (pbr > 3) || ++ (dbr < 0) || (dbr > 1)) ++ return 15; /* table indexes out of range, go slow */ ++ ++ temp = ((((MCF_CLK / 2) / pbr_tbl[pbr]) * (1 + dbr)) / speed_hz); ++ ++ while (temp >= brs[index]) ++ if (index++ >= 15) ++ break; ++ ++ DBG("baud rate scaler = 0x%x - %d\n", index, brs[index]); ++ return(index); ++} ++ ++static int write(struct driver_data *drv_data) ++{ ++ int tx_count = 0; ++ int tx_word = is_word_transfer(drv_data); ++ u16 d16; ++ u8 d8; ++ u32 dspi_pushr = 0; ++ int first = 1; ++#if defined(SPI_DSPI_EDMA) ++ u32 *edma_wr = (u32 *)(drv_data->edma_tx_buf); ++#endif ++ ++ /* If we are in word mode, but only have a single byte to transfer ++ * then switch to byte mode temporarily. Will switch back at the ++ * end of the transfer. */ ++ if (tx_word && ((drv_data->tx_end - drv_data->tx) == 1)) { ++ drv_data->flags |= TRAN_STATE_WORD_ODD_NUM; ++ set_8bit_transfer_mode(drv_data); ++ tx_word = 0; ++ } ++ ++ while ((drv_data->tx < drv_data->tx_end) && (tx_count < DSPI_FIFO_SIZE)) { ++// DBG("while\n"); ++ if (tx_word) { ++ if ((drv_data->tx_end - drv_data->tx) == 1) ++ break; ++ ++ if (!(drv_data->flags & TRAN_STATE_TX_VOID)) ++ d16 = *(u16 *)drv_data->tx; ++ else ++ d16 = drv_data->void_write_data; ++ ++ dspi_pushr = MCF_DSPI_DTFR_TXDATA(d16) | ++ DSPI_CS(drv_data->cs) | ++ MCF_DSPI_DTFR_CTAS(drv_data->cs) | ++ MCF_DSPI_DTFR_CONT; ++ ++ drv_data->tx += 2; ++ } else { ++ if (!(drv_data->flags & TRAN_STATE_TX_VOID)) ++ d8 = *(u8 *)drv_data->tx; ++ else ++ d8 = *(u8 *)&drv_data->void_write_data; ++ ++ dspi_pushr = MCF_DSPI_DTFR_TXDATA(d8) | ++ DSPI_CS(drv_data->cs) | ++ MCF_DSPI_DTFR_CTAS(drv_data->cs) | ++ MCF_DSPI_DTFR_CONT; ++ ++ drv_data->tx++; ++ } ++ ++ if (drv_data->tx == drv_data->tx_end ++ || tx_count == DSPI_FIFO_SIZE-1) { ++ /* last transfer in the queue */ ++ dspi_pushr |= MCF_DSPI_DTFR_EOQ; ++ if ((drv_data->cs_change) ++ && (drv_data->tx == drv_data->tx_end)) ++ dspi_pushr &= ~MCF_DSPI_DTFR_CONT; ++#ifdef CONFIG_M547X_8X ++ /* EOQ gets missed if we don't delay */ ++ udelay(100); ++#endif ++ } else if (tx_word && ((drv_data->tx_end - drv_data->tx) == 1)) ++ dspi_pushr |= MCF_DSPI_DTFR_EOQ; ++ ++ if (first) { ++ first = 0; ++ dspi_pushr |= MCF_DSPI_DTFR_CTCNT; /* clear counter */ ++ } ++#if defined(SPI_DSPI_EDMA) ++ *edma_wr = dspi_pushr; ++ edma_wr++; ++#else ++ *drv_data->dspi_dtfr = dspi_pushr; ++#endif ++ tx_count++; ++ } ++ ++#if defined(SPI_DSPI_EDMA) ++ if (tx_count > 0) { ++ ++ mcf_edma_set_tcd_params(DSPI_DMA_TX_TCD, ++ virt_to_phys(drv_data->edma_tx_buf), ++ (u32)drv_data->dspi_dtfr, ++ MCF_EDMA_TCD_ATTR_SSIZE_32BIT ++ | MCF_EDMA_TCD_ATTR_DSIZE_32BIT, ++ 4, /* soff */ ++ 4 * tx_count, /* nbytes */ ++ 0, /* slast */ ++ 1, /* citer */ ++ 1, /* biter */ ++ 0, /* doff */ ++ 0, /* dlastsga */ ++ 0, /* major_int */ ++ 1); /* disable_req */ ++ ++ mcf_edma_set_tcd_params(DSPI_DMA_RX_TCD, ++ (u32)drv_data->dspi_drfr, ++ virt_to_phys(drv_data->edma_rx_buf), ++ MCF_EDMA_TCD_ATTR_SSIZE_32BIT ++ | MCF_EDMA_TCD_ATTR_DSIZE_32BIT, ++ 0, /* soff */ ++ 4 * tx_count, /* nbytes */ ++ 0, /* slast */ ++ 1, /* citer */ ++ 1, /* biter */ ++ 4, /* doff */ ++ 0, /* dlastsga */ ++ 0, /* major_int */ ++ 1); /* disable_req */ ++ ++ mcf_edma_start_transfer(DSPI_DMA_TX_TCD); ++ } ++#endif ++ return (tx_count * (tx_word + 1)); ++} ++ ++static int read(struct driver_data *drv_data) ++{ ++ int rx_count = 0; ++ int rx_word = is_word_transfer(drv_data); ++ u16 d; ++#if defined(SPI_DSPI_EDMA) ++ u32 *rx_edma = (u32 *) drv_data->edma_rx_buf; ++ ++ /* receive SPI data */ ++ mcf_edma_start_transfer(DSPI_DMA_RX_TCD); ++#endif ++ while ((drv_data->rx < drv_data->rx_end) ++ && (rx_count < DSPI_FIFO_SIZE)) { ++ ++ if (rx_word) { ++ if ((drv_data->rx_end - drv_data->rx) == 1) ++ break; ++#if defined(SPI_DSPI_EDMA) ++ d = MCF_DSPI_DRFR_RXDATA(*rx_edma); ++ rx_edma++; ++#else ++ d = MCF_DSPI_DRFR_RXDATA(*drv_data->dspi_drfr); ++#endif ++ if (!(drv_data->flags & TRAN_STATE_RX_VOID)) ++ *(u16 *)drv_data->rx = d; ++ drv_data->rx += 2; ++ ++ } else { ++#if defined(SPI_DSPI_EDMA) ++ d = MCF_DSPI_DRFR_RXDATA(*rx_edma); ++ rx_edma++; ++#else ++ d = MCF_DSPI_DRFR_RXDATA(*drv_data->dspi_drfr); ++#endif ++ if (!(drv_data->flags & TRAN_STATE_RX_VOID)) ++ *(u8 *)drv_data->rx = d; ++ drv_data->rx++; ++ } ++ rx_count++; ++ DBG("rxd=0x%x\n", d); ++ } ++ return rx_count; ++} ++ ++ ++static inline void dspi_setup_chip(struct driver_data *drv_data) ++{ ++ struct chip_data *chip = drv_data->cur_chip; ++ ++ DBG("\n"); ++ *drv_data->mcr = chip->mcr_val; ++ *(drv_data->ctar+drv_data->cs) = chip->ctar_val; ++ *drv_data->dspi_rser = MCF_DSPI_DRSER_EOQFE; ++} ++ ++#if defined(SPI_DSPI_EDMA) ++static int edma_tx_handler(int channel, void *dev) ++{ ++ DBG("\n"); ++ if (channel == DSPI_DMA_TX_TCD) ++ mcf_edma_stop_transfer(DSPI_DMA_TX_TCD); ++ return IRQ_HANDLED; ++} ++ ++static int edma_rx_handler(int channel, void *dev) ++{ ++ DBG("\n"); ++ if (channel == DSPI_DMA_RX_TCD) ++ mcf_edma_stop_transfer(DSPI_DMA_RX_TCD); ++ return IRQ_HANDLED; ++} ++#endif ++ ++static irqreturn_t dspi_interrupt(int irq, void *dev_id) ++{ ++ struct driver_data *drv_data = (struct driver_data *)dev_id; ++ struct spi_message *msg = drv_data->cur_msg; ++ ++ /* Clear all flags immediately */ ++ *drv_data->dspi_sr = MCF_DSPI_DSR_EOQF; ++ ++ if (!drv_data->cur_msg || !drv_data->cur_msg->state) { ++#if !defined(SPI_DSPI_EDMA) ++ u32 irq_status = *drv_data->dspi_sr; ++ /* if eDMA is used it happens some time (at least once)*/ ++ printk(KERN_ERR "Bad message or transfer state handler. \ ++ IRQ status = %x\n", irq_status); ++#endif ++ return IRQ_NONE; ++ } ++ ++ DBG("\n"); ++ /* ++ * Read the data into the buffer and reload and start ++ * queue with new data if not finished. If finished ++ * then setup the next transfer ++ */ ++ read(drv_data); ++ ++ if (drv_data->rx == drv_data->rx_end) { ++ /* ++ * Finished now - fall through and schedule next ++ * transfer tasklet ++ */ ++ if (drv_data->flags & TRAN_STATE_WORD_ODD_NUM) ++ set_16bit_transfer_mode(drv_data); ++ ++ msg->state = next_transfer(drv_data); ++ } else { ++ /* not finished yet - keep going */ ++ msg->actual_length += write(drv_data); ++ return IRQ_HANDLED; ++ } ++ ++ tasklet_schedule(&drv_data->pump_transfers); ++ ++ return IRQ_HANDLED; ++} ++ ++/* caller already set message->status; dma and pio irqs are blocked */ ++static void giveback(struct driver_data *drv_data) ++{ ++ struct spi_transfer *last_transfer; ++ unsigned long flags; ++ struct spi_message *msg; ++ DBG("\n"); ++ ++ spin_lock_irqsave(&drv_data->lock, flags); ++ msg = drv_data->cur_msg; ++ drv_data->cur_msg = NULL; ++ drv_data->cur_transfer = NULL; ++ drv_data->cur_chip = NULL; ++ queue_work(drv_data->workqueue, &drv_data->pump_messages); ++ spin_unlock_irqrestore(&drv_data->lock, flags); ++ ++ last_transfer = list_entry(msg->transfers.prev, ++ struct spi_transfer, transfer_list); ++ ++ if (!last_transfer->cs_change) ++ drv_data->cs_control(drv_data->cs, QSPI_CS_DROP); ++ ++ msg->state = NULL; ++ if (msg->complete) ++ msg->complete(msg->context); ++} ++ ++ ++static void pump_transfers(unsigned long data) ++{ ++ struct driver_data *drv_data = (struct driver_data *)data; ++ struct spi_message *message = NULL; ++ struct spi_transfer *transfer = NULL; ++ struct spi_transfer *previous = NULL; ++ struct chip_data *chip = NULL; ++ unsigned long flags; ++ DBG("\n"); ++ /* Get current state information */ ++ message = drv_data->cur_msg; ++ transfer = drv_data->cur_transfer; ++ chip = drv_data->cur_chip; ++ ++ /* Handle for abort */ ++ if (message->state == ERROR_STATE) { ++ message->status = -EIO; ++ giveback(drv_data); ++ return; ++ } ++ ++ /* Handle end of message */ ++ if (message->state == DONE_STATE) { ++ message->status = 0; ++ giveback(drv_data); ++ return; ++ } ++ ++ if (message->state == START_STATE) { ++ dspi_setup_chip(drv_data); ++ ++ if (drv_data->cs_control) ++ drv_data->cs_control(message->spi->chip_select, ++ QSPI_CS_ASSERT); ++ } ++ ++ /* Delay if requested at end of transfer*/ ++ if (message->state == RUNNING_STATE) { ++ previous = list_entry(transfer->transfer_list.prev, ++ struct spi_transfer, ++ transfer_list); ++ ++ if (drv_data->cs_control && transfer->cs_change) ++ drv_data->cs_control(message->spi->chip_select, ++ QSPI_CS_DROP); ++ ++ if (previous->delay_usecs) ++ udelay(previous->delay_usecs); ++ ++ if (drv_data->cs_control && transfer->cs_change) ++ drv_data->cs_control(message->spi->chip_select, ++ QSPI_CS_ASSERT); ++ } ++ ++ drv_data->flags = 0; ++ drv_data->tx = (void *)transfer->tx_buf; ++ drv_data->tx_end = drv_data->tx + transfer->len; ++ drv_data->rx = transfer->rx_buf; ++ drv_data->rx_end = drv_data->rx + transfer->len; ++ ++ if (!drv_data->rx) ++ drv_data->flags |= TRAN_STATE_RX_VOID; ++ if (!drv_data->tx) ++ drv_data->flags |= TRAN_STATE_TX_VOID; ++ drv_data->cs = message->spi->chip_select; ++ drv_data->cs_change = transfer->cs_change; ++ drv_data->void_write_data = chip->void_write_data; ++ if (transfer->speed_hz) { ++ *(drv_data->ctar + drv_data->cs) = \ ++ ((chip->ctar_val & ~0xF) | \ ++ hz_to_spi_baud(chip->ctar.pbr, \ ++ chip->ctar.dbr, \ ++ transfer->speed_hz)); ++ } ++ ++ message->state = RUNNING_STATE; ++ /* Go baby, go */ ++ local_irq_save(flags); ++ message->actual_length += write(drv_data); ++ local_irq_restore(flags); ++} ++ ++ ++static void pump_messages(struct work_struct *work) ++{ ++ struct driver_data *drv_data; ++ unsigned long flags; ++ DBG("\n"); ++ ++ drv_data = container_of(work, struct driver_data, pump_messages); ++ ++ /* Lock queue and check for queue work */ ++ spin_lock_irqsave(&drv_data->lock, flags); ++ if (list_empty(&drv_data->queue) ++ || drv_data->run == QUEUE_STOPPED) { ++ drv_data->busy = 0; ++ spin_unlock_irqrestore(&drv_data->lock, flags); ++ return; ++ } ++ ++ /* Make sure we are not already running a message */ ++ if (drv_data->cur_msg) { ++ spin_unlock_irqrestore(&drv_data->lock, flags); ++ return; ++ } ++ ++ /* Extract head of queue */ ++ drv_data->cur_msg = list_entry(drv_data->queue.next, ++ struct spi_message, queue); ++ list_del_init(&drv_data->cur_msg->queue); ++ ++ /* Initial message state*/ ++ drv_data->cur_msg->state = START_STATE; ++ drv_data->cur_transfer = list_entry(drv_data->cur_msg->transfers.next, ++ struct spi_transfer, ++ transfer_list); ++ ++ if (drv_data->cur_transfer->transfer_list.next ++ == &drv_data->cur_msg->transfers) ++ drv_data->cur_transfer->cs_change = 1; /* last */ ++ ++ ++ /* Setup the SPI Registers using the per chip configuration */ ++ drv_data->cur_chip = spi_get_ctldata(drv_data->cur_msg->spi); ++ ++ /* Mark as busy and launch transfers */ ++ tasklet_schedule(&drv_data->pump_transfers); ++ ++ drv_data->busy = 1; ++ spin_unlock_irqrestore(&drv_data->lock, flags); ++} ++ ++/****************************************************************************/ ++ ++/* ++ * SPI master implementation ++ */ ++ ++static int transfer(struct spi_device *spi, struct spi_message *msg) ++{ ++ struct driver_data *drv_data = spi_master_get_devdata(spi->master); ++ unsigned long flags; ++ ++ DBG("\n"); ++ spin_lock_irqsave(&drv_data->lock, flags); ++ ++ if (drv_data->run == QUEUE_STOPPED) { ++ spin_unlock_irqrestore(&drv_data->lock, flags); ++ return -ESHUTDOWN; ++ } ++ ++ msg->actual_length = 0; ++ msg->status = -EINPROGRESS; ++ msg->state = START_STATE; ++ ++ list_add_tail(&msg->queue, &drv_data->queue); ++ ++ if (drv_data->run == QUEUE_RUNNING && !drv_data->busy) ++ queue_work(drv_data->workqueue, &drv_data->pump_messages); ++ ++ spin_unlock_irqrestore(&drv_data->lock, flags); ++ ++ return 0; ++} ++ ++ ++static int setup(struct spi_device *spi) ++{ ++ ++ struct chip_data *chip; ++ struct coldfire_dspi_chip *chip_info ++ = (struct coldfire_dspi_chip *)spi->controller_data; ++ DBG("\n"); ++ ++ /* Only alloc on first setup */ ++ chip = spi_get_ctldata(spi); ++ if (chip == NULL) { ++ chip = kcalloc(1, sizeof(struct chip_data), GFP_KERNEL); ++ if (!chip) ++ return -ENOMEM; ++ spi->mode = chip_info->mode; ++ spi->bits_per_word = chip_info->bits_per_word; ++ } ++ ++ chip->mcr.master = 1; ++ chip->mcr.cont_scke = 0; ++ chip->mcr.dconf = 0; ++ chip->mcr.frz = 0; ++ chip->mcr.mtfe = 0; ++ chip->mcr.pcsse = 0; ++ chip->mcr.rooe = 0; ++ chip->mcr.pcsis = 0xFF; ++ chip->mcr.reserved15 = 0; ++ chip->mcr.mdis = 0; ++ chip->mcr.dis_tx = 0; ++ chip->mcr.dis_rxf = 0; ++ chip->mcr.clr_tx = 1; ++ chip->mcr.clr_rxf = 1; ++ chip->mcr.smpl_pt = 0; ++ chip->mcr.reserved71 = 0; ++ chip->mcr.halt = 0; ++ ++ if ((spi->bits_per_word >= 4) && (spi->bits_per_word <= 16)) { ++ chip->ctar.fmsz = spi->bits_per_word-1; ++ } else { ++ printk(KERN_ERR "Invalid wordsize\n"); ++ kfree(chip); ++ return -ENODEV; ++ } ++ ++ chip->void_write_data = chip_info->void_write_data; ++ ++ if (spi->max_speed_hz != 0) ++ chip_info->br = hz_to_spi_baud(chip_info->pbr, chip_info->dbr, \ ++ spi->max_speed_hz); ++ ++ chip->ctar.cpha = (spi->mode & SPI_CPHA) ? 1 : 0; ++ chip->ctar.cpol = (spi->mode & SPI_CPOL) ? 1 : 0; ++ chip->ctar.lsbfe = (spi->mode & SPI_LSB_FIRST) ? 1 : 0; ++ chip->ctar.dbr = chip_info->dbr; ++ chip->ctar.pbr = chip_info->pbr; ++ chip->ctar.br = chip_info->br; ++ chip->ctar.pcssck = chip_info->pcssck; ++ chip->ctar.pasc = chip_info->pasc; ++ chip->ctar.pdt = chip_info->pdt; ++ chip->ctar.cssck = chip_info->cssck; ++ chip->ctar.asc = chip_info->asc; ++ chip->ctar.dt = chip_info->dt; ++ ++ spi_set_ctldata(spi, chip); ++ ++ return 0; ++} ++ ++static int init_queue(struct driver_data *drv_data) ++{ ++ INIT_LIST_HEAD(&drv_data->queue); ++ spin_lock_init(&drv_data->lock); ++ ++ drv_data->run = QUEUE_STOPPED; ++ drv_data->busy = 0; ++ ++ tasklet_init(&drv_data->pump_transfers, ++ pump_transfers, (unsigned long)drv_data); ++ ++ INIT_WORK(&drv_data->pump_messages, pump_messages); ++ ++ drv_data->workqueue = create_singlethread_workqueue( ++ drv_data->master->dev.parent->bus_id); ++ if (drv_data->workqueue == NULL) ++ return -EBUSY; ++ ++ return 0; ++} ++ ++static int start_queue(struct driver_data *drv_data) ++{ ++ unsigned long flags; ++ ++ spin_lock_irqsave(&drv_data->lock, flags); ++ ++ if (drv_data->run == QUEUE_RUNNING || drv_data->busy) { ++ spin_unlock_irqrestore(&drv_data->lock, flags); ++ return -EBUSY; ++ } ++ ++ drv_data->run = QUEUE_RUNNING; ++ drv_data->cur_msg = NULL; ++ drv_data->cur_transfer = NULL; ++ drv_data->cur_chip = NULL; ++ spin_unlock_irqrestore(&drv_data->lock, flags); ++ ++ queue_work(drv_data->workqueue, &drv_data->pump_messages); ++ ++ return 0; ++} ++ ++static int stop_queue(struct driver_data *drv_data) ++{ ++ unsigned long flags; ++ unsigned limit = 500; ++ int status = 0; ++ ++ spin_lock_irqsave(&drv_data->lock, flags); ++ ++ /* This is a bit lame, but is optimized for the common execution path. ++ * A wait_queue on the drv_data->busy could be used, but then the common ++ * execution path (pump_messages) would be required to call wake_up or ++ * friends on every SPI message. Do this instead */ ++ drv_data->run = QUEUE_STOPPED; ++ while (!list_empty(&drv_data->queue) && drv_data->busy && limit--) { ++ spin_unlock_irqrestore(&drv_data->lock, flags); ++ msleep(10); ++ spin_lock_irqsave(&drv_data->lock, flags); ++ } ++ ++ if (!list_empty(&drv_data->queue) || drv_data->busy) ++ status = -EBUSY; ++ ++ spin_unlock_irqrestore(&drv_data->lock, flags); ++ ++ return status; ++} ++ ++static int destroy_queue(struct driver_data *drv_data) ++{ ++ int status; ++ ++ status = stop_queue(drv_data); ++ if (status != 0) ++ return status; ++ ++ destroy_workqueue(drv_data->workqueue); ++ ++ return 0; ++} ++ ++ ++static void cleanup(struct spi_device *spi) ++{ ++ struct chip_data *chip = spi_get_ctldata((struct spi_device *)spi); ++ ++ dev_dbg(&spi->dev, "spi_device %u.%u cleanup\n", ++ spi->master->bus_num, spi->chip_select); ++ ++ kfree(chip); ++} ++ ++ ++/****************************************************************************/ ++ ++/* ++ * Generic Device driver routines and interface implementation ++ */ ++ ++static int coldfire_spi_probe(struct platform_device *pdev) ++{ ++ struct device *dev = &pdev->dev; ++ struct coldfire_spi_master *platform_info; ++ struct spi_master *master; ++ struct driver_data *drv_data = 0; ++ struct resource *memory_resource; ++ int irq; ++ int status = 0; ++ int i; ++#if defined(SPI_DSPI_EDMA) ++ dma_addr_t dma_handle; ++#endif ++ ++ platform_info = (struct coldfire_spi_master *)dev->platform_data; ++ ++ master = spi_alloc_master(dev, sizeof(struct driver_data)); ++ if (!master) ++ return -ENOMEM; ++ ++ drv_data = spi_master_get_devdata(master); ++ drv_data->master = master; ++ ++ INIT_LIST_HEAD(&drv_data->queue); ++ spin_lock_init(&drv_data->lock); ++ ++ master->bus_num = platform_info->bus_num; ++ master->num_chipselect = platform_info->num_chipselect; ++ master->cleanup = cleanup; ++ master->setup = setup; ++ master->transfer = transfer; ++ ++ drv_data->cs_control = platform_info->cs_control; ++ if (drv_data->cs_control) ++ for (i = 0; i < master->num_chipselect; i++) ++ drv_data->cs_control(i, QSPI_CS_INIT | QSPI_CS_DROP); ++ ++ /* Setup register addresses */ ++ memory_resource = platform_get_resource_byname(pdev, ++ IORESOURCE_MEM, "spi-module"); ++ if (!memory_resource) { ++ dev_dbg(dev, "can not find platform module memory\n"); ++ goto out_error_master_alloc; ++ } ++ ++#if defined(SPI_DSPI_EDMA) ++ drv_data->edma_tx_buf = dma_alloc_coherent(NULL, EDMA_BUFSIZE_KMALLOC, \ ++ &dma_handle, GFP_DMA); ++ if (!drv_data->edma_tx_buf) { ++ dev_dbg(dev, "cannot allocate eDMA TX memory\n"); ++ goto out_error_master_alloc; ++ } ++ drv_data->edma_rx_buf = dma_alloc_coherent(NULL, EDMA_BUFSIZE_KMALLOC, \ ++ &dma_handle, GFP_DMA); ++ if (!drv_data->edma_rx_buf) { ++ dma_free_coherent(NULL, EDMA_BUFSIZE_KMALLOC, \ ++ drv_data->edma_tx_buf, dma_handle); ++ kfree(drv_data->edma_tx_buf); ++ dev_dbg(dev, "cannot allocate eDMA RX memory\n"); ++ goto out_error_master_alloc; ++ } ++#endif ++ ++ drv_data->mcr = (void *)&MCF_DSPI_DMCR; ++ drv_data->ctar = (void *)&MCF_DSPI_DCTAR0; ++ drv_data->dspi_sr = (void *)&MCF_DSPI_DSR; ++ drv_data->dspi_rser = (void *)&MCF_DSPI_DRSER; ++ drv_data->dspi_dtfr = (void *)&MCF_DSPI_DTFR; ++ drv_data->dspi_drfr = (void *)&MCF_DSPI_DRFR; ++ ++ memory_resource = platform_get_resource_byname(pdev, IORESOURCE_MEM, ++ "spi-par"); ++ if (!memory_resource) { ++ dev_dbg(dev, "No spi-par memory\n"); ++ goto out_error_master_alloc; ++ } ++ drv_data->par = (void *)memory_resource->start; ++ ++ memory_resource = platform_get_resource_byname(pdev, IORESOURCE_MEM, ++ "spi-int-level"); ++ if (!memory_resource) { ++ dev_dbg(dev, "No spi-int-level memory\n"); ++ goto out_error_master_alloc; ++ } ++ drv_data->int_icr = (void *)memory_resource->start; ++ ++ memory_resource = platform_get_resource_byname(pdev, IORESOURCE_MEM, ++ "spi-int-mask"); ++ if (!memory_resource) { ++ dev_dbg(dev, "No spi-int-mask memory\n"); ++ goto out_error_master_alloc; ++ } ++ drv_data->int_mr = (void *)memory_resource->start; ++ ++ if (platform_info->irq_list) { ++ /* multiple IRQs */ ++ int *irqlist = platform_info->irq_list; ++ while ((irq = *irqlist++)) { ++ int off = *irqlist++; ++ int lvl = *irqlist++; ++ int msk = *irqlist++; ++ status = request_irq(irq, dspi_interrupt, IRQF_DISABLED, ++ dev->bus_id, drv_data); ++ if (status < 0) { ++ dev_err(&pdev->dev, ++ "Unable to attach ColdFire DSPI interrupt\n"); ++ goto out_error_master_alloc; ++ } ++ ++ if (lvl) ++ *(drv_data->int_icr + off) = lvl; ++ ++ if (msk) ++ *drv_data->int_mr &= ~msk; ++ } ++ } ++ else { ++ irq = platform_info->irq_vector; ++ ++ status = request_irq(platform_info->irq_vector, dspi_interrupt, ++ IRQF_DISABLED, dev->bus_id, drv_data); ++ if (status < 0) { ++ dev_err(&pdev->dev, "Unable to attach ColdFire DSPI interrupt\n"); ++ goto out_error_master_alloc; ++ } ++ ++ *drv_data->int_icr = platform_info->irq_lp; ++ *drv_data->int_mr &= ~platform_info->irq_mask; ++ } ++ ++ /* Now that we have all the addresses etc. Let's set it up */ ++ if (platform_info->par_val) ++ *drv_data->par = platform_info->par_val; ++ ++ /* Initial and start queue */ ++ status = init_queue(drv_data); ++ if (status != 0) { ++ dev_err(&pdev->dev, "Problem initializing DSPI queue\n"); ++ goto out_error_irq_alloc; ++ } ++ status = start_queue(drv_data); ++ if (status != 0) { ++ dev_err(&pdev->dev, "Problem starting DSPI queue\n"); ++ goto out_error_irq_alloc; ++ } ++ ++ /* Register with the SPI framework */ ++ platform_set_drvdata(pdev, drv_data); ++ status = spi_register_master(master); ++ if (status != 0) { ++ dev_err(&pdev->dev, "Problem registering DSPI master\n"); ++ status = -EINVAL; ++ goto out_error_queue_alloc; ++ } ++ ++#if defined(SPI_DSPI_EDMA) ++ if (mcf_edma_request_channel(DSPI_DMA_TX_TCD, ++ edma_tx_handler, ++ NULL, ++ 0x0, ++ pdev, ++ NULL, /* spinlock */ ++ DRIVER_NAME) < 0){ ++ dev_err(&pdev->dev, "eDMA transmit channel request\n"); ++ status = -EINVAL; ++ goto out_error_queue_alloc; ++ } ++ ++ if (mcf_edma_request_channel(DSPI_DMA_RX_TCD, ++ edma_rx_handler, ++ NULL, ++ 0x0, ++ pdev, ++ NULL, /* spinlock */ ++ DRIVER_NAME) < 0){ ++ dev_err(&pdev->dev, "eDAM receive channel request\n"); ++ status = -EINVAL; ++ mcf_edma_free_channel(DSPI_DMA_TX_TCD, pdev); ++ goto out_error_queue_alloc; ++ } ++#endif ++ ++ printk(KERN_INFO "DSPI: Coldfire master initialized\n"); ++ return status; ++ ++out_error_queue_alloc: ++ destroy_queue(drv_data); ++ ++out_error_irq_alloc: ++ free_irq(platform_info->irq_vector, drv_data); ++ ++out_error_master_alloc: ++ spi_master_put(master); ++ return status; ++ ++} ++ ++static int coldfire_spi_remove(struct platform_device *pdev) ++{ ++ struct driver_data *drv_data = platform_get_drvdata(pdev); ++ int irq; ++ int status = 0; ++ ++ if (!drv_data) ++ return 0; ++ ++#if defined(SPI_DSPI_EDMA) ++ mcf_edma_free_channel(DSPI_DMA_TX_TCD, pdev); ++ mcf_edma_free_channel(DSPI_DMA_RX_TCD, pdev); ++#endif ++ ++ /* Remove the queue */ ++ status = destroy_queue(drv_data); ++ if (status != 0) ++ return status; ++ ++ /* Release IRQ */ ++ irq = platform_get_irq(pdev, 0); ++ if (irq >= 0) ++ free_irq(irq, drv_data); ++ ++ /* Disconnect from the SPI framework */ ++ spi_unregister_master(drv_data->master); ++ ++ /* Prevent double remove */ ++ platform_set_drvdata(pdev, NULL); ++ ++ return 0; ++} ++ ++static void coldfire_spi_shutdown(struct platform_device *pdev) ++{ ++ int status = coldfire_spi_remove(pdev); ++ ++ if (status != 0) ++ dev_err(&pdev->dev, "shutdown failed with %d\n", status); ++} ++ ++ ++#ifdef CONFIG_PM ++static int suspend_devices(struct device *dev, void *pm_message) ++{ ++ pm_message_t *state = pm_message; ++ ++ if (dev->power.power_state.event != state->event) { ++ dev_warn(dev, "pm state does not match request\n"); ++ return -1; ++ } ++ ++ return 0; ++} ++ ++static int coldfire_spi_suspend(struct platform_device *pdev, ++ pm_message_t state) ++{ ++ struct driver_data *drv_data = platform_get_drvdata(pdev); ++ int status = 0; ++ ++ /* Check all childern for current power state */ ++ if (device_for_each_child(&pdev->dev, ++ &state, suspend_devices) != 0) { ++ dev_warn(&pdev->dev, "suspend aborted\n"); ++ return -1; ++ } ++ ++ status = stop_queue(drv_data); ++ if (status != 0) ++ return status; ++ ++ return 0; ++} ++ ++static int coldfire_spi_resume(struct platform_device *pdev) ++{ ++ struct driver_data *drv_data = platform_get_drvdata(pdev); ++ int status = 0; ++ ++ /* Start the queue running */ ++ status = start_queue(drv_data); ++ if (status != 0) { ++ dev_err(&pdev->dev, "problem starting queue (%d)\n", status); ++ return status; ++ } ++ ++ return 0; ++} ++#else ++#define coldfire_spi_suspend NULL ++#define coldfire_spi_resume NULL ++#endif /* CONFIG_PM */ ++ ++static struct platform_driver driver = { ++ .driver = { ++ .name = "spi_coldfire", ++ .bus = &platform_bus_type, ++ .owner = THIS_MODULE, ++ }, ++ .probe = coldfire_spi_probe, ++ .remove = __devexit_p(coldfire_spi_remove), ++ .shutdown = coldfire_spi_shutdown, ++ .suspend = coldfire_spi_suspend, ++ .resume = coldfire_spi_resume, ++}; ++ ++static int __init coldfire_spi_init(void) ++{ ++ platform_driver_register(&driver); ++ ++ return 0; ++} ++module_init(coldfire_spi_init); ++ ++static void __exit coldfire_spi_exit(void) ++{ ++ platform_driver_unregister(&driver); ++} ++module_exit(coldfire_spi_exit); ++ ++MODULE_AUTHOR("Matt Waddel"); ++MODULE_DESCRIPTION("ColdFire DSPI Contoller"); ++MODULE_LICENSE("GPL"); +--- /dev/null ++++ b/include/asm-m68k/mcfdspi.h +@@ -0,0 +1,48 @@ ++/* ++ * mcfdspi.h-DSPI controller for the ColdFire processors. ++ * ++ * Andrey Butok ++ * Copyright Freescale Semiconductor, Inc. 2008 ++ * ++ * This file is based on mcfqspi.h ++ * ++ * This program is free software; you can redistribute it and/or modify it ++ * under the terms of the GNU General Public License as published by the ++ * Free Software Foundation; either version 2 of the License, or (at your ++ * option) any later version. ++ * ++ * This program is distributed in the hope that it will be useful, ++ * but WITHOUT ANY WARRANTY; without even the implied warranty of ++ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the ++ * GNU General Public License for more details. ++ * ++ * You should have received a copy of the GNU General Public License ++ * along with this program; if not, write to the Free Software ++ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA ++ * ++ *************************************************************************** ++ * Changes: ++ * v0.001 25 March 2008 Andrey Butok ++ * Initial Release - developed on uClinux with 2.6.23 kernel. ++ * ++ */ ++ ++#ifndef MCFDSPI_H_ ++#define MCFDSPI_H_ ++ ++struct coldfire_dspi_chip { ++ u8 mode; ++ u8 bits_per_word; ++ u16 void_write_data; ++ /* Only used in master mode */ ++ u8 dbr; /* Double baud rate */ ++ u8 pbr; /* Baud rate prescaler */ ++ u8 br; /* Baud rate scaler */ ++ u8 pcssck; /* PCS to SCK delay prescaler */ ++ u8 pasc; /* After SCK delay prescaler */ ++ u8 pdt; /* Delay after transfer prescaler */ ++ u8 cssck; /* PCS to SCK delay scaler */ ++ u8 asc; /* After SCK delay scaler */ ++ u8 dt; /* Delay after transfer scaler */ ++}; ++#endif /*MCFDSPI_H_*/ |