From dae5d7c71ba47bdd0603d5cc3e8a3dfe28d209a0 Mon Sep 17 00:00:00 2001 From: Thomas Kunze Date: Mon, 20 Oct 2008 17:30:32 +0200 Subject: [PATCH 02/23] add locomo_spi driver --- drivers/spi/Kconfig | 4 + drivers/spi/Makefile | 1 + drivers/spi/locomo_spi.c | 1097 ++++++++++++++++++++++++++++++++++++++++++++++ drivers/spi/locomo_spi.h | 75 ++++ 4 files changed, 1177 insertions(+), 0 deletions(-) create mode 100644 drivers/spi/locomo_spi.c create mode 100644 drivers/spi/locomo_spi.h diff --git a/drivers/spi/Kconfig b/drivers/spi/Kconfig index b9d0efb..aa3c60a 100644 --- a/drivers/spi/Kconfig +++ b/drivers/spi/Kconfig @@ -123,6 +123,10 @@ config SPI_MPC52xx_PSC This enables using the Freescale MPC52xx Programmable Serial Controller in master SPI mode. +config SPI_LOCOMO + tristate "Locomo SPI master" + depends on SPI_MASTER && SHARP_LOCOMO && EXPERIMENTAL + config SPI_MPC83xx tristate "Freescale MPC83xx/QUICC Engine SPI controller" depends on (PPC_83xx || QUICC_ENGINE) && EXPERIMENTAL diff --git a/drivers/spi/Makefile b/drivers/spi/Makefile index ccf18de..794dd45 100644 --- a/drivers/spi/Makefile +++ b/drivers/spi/Makefile @@ -29,6 +29,7 @@ obj-$(CONFIG_SPI_S3C24XX) += spi_s3c24xx.o obj-$(CONFIG_SPI_TXX9) += spi_txx9.o obj-$(CONFIG_SPI_XILINX) += xilinx_spi.o obj-$(CONFIG_SPI_SH_SCI) += spi_sh_sci.o +obj-$(CONFIG_SPI_LOCOMO) += locomo_spi.o # ... add above this line ... # SPI protocol drivers (device/link on bus) diff --git a/drivers/spi/locomo_spi.c b/drivers/spi/locomo_spi.c new file mode 100644 index 0000000..d3a4bd9 --- /dev/null +++ b/drivers/spi/locomo_spi.c @@ -0,0 +1,1097 @@ +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include "locomo_spi.h" +static struct locomospi_dev * spidev; +static struct work_struct transfer_wq; +int delay; + +char* transtxbuf=(char*)NULL; +char* transrxbuf=(char*)NULL; +int transfercount=0, transfersize=0; +static DECLARE_WAIT_QUEUE_HEAD(transferqueue); +/* MMC_SPI functions *********************************************************/ + +static int locomommcspi_init(struct device *dev, irqreturn_t (*isr)(int, void*), void *mmc) +{ + int result; + result=request_irq(IRQ_LOCOMO_CARDDETECT, isr, IRQF_TRIGGER_FALLING | IRQF_TRIGGER_RISING, "locomo-spi", mmc); + return result; +} + +static void locomommcspi_exit(struct device *dev, void* mmc) +{ + free_irq(IRQ_LOCOMO_CARDDETECT, mmc); +} + +static int locomommcspi_getro(struct device *dev) +{ + return locomo_gpio_read_level(spidev->ldev->dev.parent,LOCOMO_GPIO_WRITE_PROT) > 0 ? 1 : 0; +} + +static void locomommcspi_setpower(struct device *dev, unsigned int mask) +{ + if(!mask && spidev->card_power) + locomospi_power(0); + else if( !spidev->card_power ) + locomospi_power(1); + +} + + +static struct mmc_spi_platform_data colliemmc ={ + .init = locomommcspi_init, + .exit = locomommcspi_exit, + .detect_delay = 200, + .get_ro = locomommcspi_getro, + .ocr_mask = MMC_VDD_32_33 | MMC_VDD_33_34, + .setpower = locomommcspi_setpower, + .powerup_msecs = 200, +}; + +/* Utility function **********************************************************/ + +static void locomospi_power(int on) +{ + locomo_gpio_write(spidev->ldev->dev.parent, LOCOMO_GPIO_CARD_POWER, on); + spidev->card_power=on; + printk(KERN_DEBUG "locomospi: power %d\n",on); +} + +static void locomospi_setclock(unsigned int div, unsigned int clock) +{ + u16 r = ioread16(spidev->base+LOCOMO_SPIMD); + div &= 0x7; + clock &= 0x3; + if(clock != spidev->clock_base || div != spidev->clock_div){ + r &= ~(LOCOMO_SPI_XSEL | LOCOMO_SPI_CLKSEL | LOCOMO_SPI_XEN); + iowrite16(r,spidev->base+LOCOMO_SPIMD); + r |= (div | (clock <<3) | LOCOMO_SPI_XEN); + iowrite16(r,spidev->base+LOCOMO_SPIMD); + spidev->clock_div = div; + spidev->clock_base = clock; + udelay(300); + } + +} +// returns 1 if card ist present, 0 otherwise +static int locomospi_carddetect() +{ + return (locomo_gpio_read_level(spidev->ldev->dev.parent,LOCOMO_GPIO_CARD_DETECT)>0)?0:1; +} + +static void locomospi_setcs(int high) +{ + u16 r; + printk(KERN_DEBUG "locomospi: cs %d\n",high); + r = ioread16(spidev->base + LOCOMO_SPICT); + if(high) + r |= LOCOMO_SPI_CS; + else + r &= ~LOCOMO_SPI_CS; + iowrite16(r, spidev->base + LOCOMO_SPICT); +} + +static void locomospi_reg_open() +{ + u16 r; + spidev->clock_div = DIV_64; + spidev->clock_base = CLOCK_18MHZ; + locomospi_power(1); + msleep(100); +// iowrite16( 0xec00 | (CLOCK_18MHZ <<3)|DIV_64, spidev->base+LOCOMO_SPIMD); + iowrite16( LOCOMO_SPI_MSB1ST | LOCOMO_SPI_DOSTAT | LOCOMO_SPI_RCPOL | LOCOMO_SPI_TCPOL + |(CLOCK_18MHZ <<3) | DIV_64, spidev->base+LOCOMO_SPIMD); +// if(locomospi_carddetect()){ + r = ioread16(spidev->base+LOCOMO_SPIMD); + r |= LOCOMO_SPI_XON; + iowrite16( r, spidev->base+LOCOMO_SPIMD); + r = ioread16(spidev->base+LOCOMO_SPIMD); + r |= LOCOMO_SPI_XEN; + iowrite16( r, spidev->base+LOCOMO_SPIMD); +// } + iowrite16( LOCOMO_SPI_CS, spidev->base+LOCOMO_SPICT); + r = ioread16(spidev->base+LOCOMO_SPICT); + r |= (LOCOMO_SPI_CEN | LOCOMO_SPI_RXUEN | LOCOMO_SPI_ALIGNEN); + iowrite16( r, spidev->base+LOCOMO_SPICT); + udelay(200); + r = ioread16(spidev->base+LOCOMO_SPICT); + iowrite16(r, spidev->base+LOCOMO_SPICT); + r = ioread16(spidev->base+LOCOMO_SPICT); + r &= ~LOCOMO_SPI_CS; + iowrite16(r, spidev->base+LOCOMO_SPICT); +} + +static void locomospi_reg_release() +{ + u16 r; + r = ioread16(spidev->base+LOCOMO_SPICT); + r &= ~LOCOMO_SPI_CEN; + iowrite16(r, spidev->base+LOCOMO_SPICT); + r = ioread16(spidev->base+LOCOMO_SPIMD); + r &= ~LOCOMO_SPI_XEN; + iowrite16(r, spidev->base+LOCOMO_SPIMD); + r = ioread16(spidev->base+LOCOMO_SPIMD); + r &= ~LOCOMO_SPI_XON; + iowrite16(r, spidev->base+LOCOMO_SPIMD); + r = ioread16(spidev->base+LOCOMO_SPICT); + r |= LOCOMO_SPI_XEN; + iowrite16(r, spidev->base+LOCOMO_SPICT); + locomospi_power(0); +} +#if 0 +static int txrx(const char* txbuffer, char* rxbuffer, int size) +{ + u16 r = ioread16(spidev->base+LOCOMO_SPICT); + r |= LOCOMO_SPI_ALIGNEN; + iowrite16(r, spidev->base+LOCOMO_SPICT); + printk(KERN_DEBUG "locomospi: %d bytes to prozess\n",size); + /* initialize global vars for isr */ + transfercount=0; transfersize=size; + transtxbuf=txbuffer; transrxbuf=rxbuffer; + + /* start transmit and go sleep isr will wake us*/ + enable_irq(IRQ_LOCOMO_SPI_TEND); + iowrite8(txbuffer[0], spidev->base+LOCOMO_SPITD); + wait_event(transferqueue, transfercount >= transfersize); + disable_irq(IRQ_LOCOMO_SPI_TEND); + transrxbuf=NULL; transtxbuf=NULL; + + r = ioread16(spidev->base+LOCOMO_SPICT); + r &= ~LOCOMO_SPI_ALIGNEN; + iowrite16(r, spidev->base+LOCOMO_SPICT); + int i; + for(i=0; i< size; i++) + printk(KERN_DEBUG "locomospi: sent: %x received: %x \n",txbuffer[i], rxbuffer[i]); + + + return size; +} + + +static int tx(const char* txbuffer, int size) +{ + printk(KERN_DEBUG "locomospi: %d bytes to send\n",size); + /* initialize global vars for isr */ + transfercount=0; transfersize=size; + transtxbuf=txbuffer; + + /* start transmit and go sleep isr will wake us*/ + enable_irq(IRQ_LOCOMO_SPI_RFW); + iowrite8(txbuffer[0], spidev->base+LOCOMO_SPITD); + wait_event(transferqueue, transfercount >= transfersize); + disable_irq(IRQ_LOCOMO_SPI_RFW); + transtxbuf=NULL; + + int i; + for(i=0; i< size; i++) + printk(KERN_DEBUG "locomospi: sent: %x\n",txbuffer[i]); + + + return size; +} + +static int rx(char* rxbuffer, int size) +{ + printk(KERN_DEBUG "locomospi: %d bytes to read\n",size); + /* initialize global vars for isr */ + transfercount=0; transfersize=size; + transrxbuf=rxbuffer; + + /* start transmit and go sleep isr will wake us*/ + enable_irq(IRQ_LOCOMO_SPI_RFR); + rxbuffer[0]=ioread8(spidev->base+LOCOMO_SPIRD); + wait_event(transferqueue, transfercount >= transfersize); + disable_irq(IRQ_LOCOMO_SPI_RFR); + transrxbuf=NULL; + + int i; + for(i=0; i< size; i++) + printk(KERN_DEBUG "locomospi: received: %x \n", rxbuffer[i]); + + + return size; +} + +#else +static int txrx(const char* txbuffer, char* rxbuffer, int size) +{ + int i=0,j=0; + int wait; + u16 r; +/* char * txback = kmalloc(size * sizeof(char), GFP_KERNEL); + memcpy(txback, txbuffer, size); +*/ + if(spidev->clock_div == 4) + wait = 0x10000; + else + wait = 8; + +// printk(KERN_DEBUG "locomospi: txrx %d bytes to prozess\n",size); + +// r = ioread16(spidev->base+LOCOMO_SPICT); +// r |= LOCOMO_SPI_ALIGNEN; +// iowrite16(r, spidev->base+LOCOMO_SPICT); + //discard first bogus byte + + ioread8(spidev->base+LOCOMO_SPIRD); + for(i=0; ibase+LOCOMO_SPIST) & LOCOMO_SPI_RFW) + break; + } + iowrite8(txbuffer[i], spidev->base+LOCOMO_SPITD); + ndelay(delay); + + for(j=0; j <= wait; j++){ + if(ioread16(spidev->base+LOCOMO_SPIST) & LOCOMO_SPI_RFR) + break; + } + rxbuffer[i] = ioread8(spidev->base+LOCOMO_SPIRD); + ndelay(delay); + } +// r = ioread16(spidev->base+LOCOMO_SPICT); +// r &= ~LOCOMO_SPI_ALIGNEN; +// iowrite16(r, spidev->base+LOCOMO_SPICT); + +/* for(j=0; j< size; j++) + printk(KERN_DEBUG "locomospi: sent: %x received: %x \n",txback[j], rxbuffer[j]); + + kfree(txback); +*/ return i; +} + +static int tx(const char* buffer, int size) +{ + int i=0,j=0; + int wait; + u16 r; + if(spidev->clock_div == 4) + wait = 0x10000; + else + wait = 8; + r = ioread16(spidev->base+LOCOMO_SPICT); + r &= ~LOCOMO_SPI_ALIGNEN; + iowrite16(r, spidev->base+LOCOMO_SPICT); + +// printk(KERN_DEBUG "locomospi: tx %d bytes to transmit\n",size); + for(i=0; ibase+LOCOMO_SPIST) & LOCOMO_SPI_RFW) + break; + } + iowrite8(buffer[i], spidev->base+LOCOMO_SPITD); + ndelay(delay); + } + + for(j=0; j <= wait; j++){ + if(ioread16(spidev->base+LOCOMO_SPIST) & LOCOMO_SPI_TEND) + break; + } + + r = ioread16(spidev->base+LOCOMO_SPICT); + r |= LOCOMO_SPI_ALIGNEN; + iowrite16(r, spidev->base+LOCOMO_SPICT); + +// for(j=0; j< size; j++) +// printk(KERN_DEBUG "locomospi: sent: %x \n", buffer[j]); +// printk(KERN_DEBUG "locomospi: tx %d bytes transmitted\n",i); + return i; +} + +static int rx(char* buffer, int size) +{ + int i,j; + int wait; + u16 r; + printk(KERN_DEBUG "locomospi: rx %d bytes to receive\n",size); + if(spidev->clock_div == 4) + wait = 0x10000; + else + wait = 8; + r = ioread16(spidev->base+LOCOMO_SPICT); + r &= ~LOCOMO_SPI_ALIGNEN; + iowrite16(r, spidev->base+LOCOMO_SPICT); + + for(i=0; ibase+LOCOMO_SPIST) & LOCOMO_SPI_RFR) + break; + } + buffer[i]= ioread8(spidev->base+LOCOMO_SPIRD); + ndelay(delay); + } + + r = ioread16(spidev->base+LOCOMO_SPICT); + r |= LOCOMO_SPI_ALIGNEN; + iowrite16(r, spidev->base+LOCOMO_SPICT); + + for(j=0; j< size; j++) + printk(KERN_DEBUG "locomospi: received: %x \n", buffer[j]); + printk(KERN_DEBUG "locomospi: rx %d bytes received\n",i); + return i; +} +#endif +/* +static irqreturn_t locomospi_rwready(int irq, void *dev_id) +{ + struct locomospi_dev* dev=(struct locomospi_dev*) dev_id; +// dev_dbg(&spidev->sdev->dev, "IRQ: %d\n", irq); +// printk(KERN_DEBUG "locomospi: IRQ: %d\n", irq); + wake_up_interruptible(&dev->waitqueue); + return IRQ_HANDLED; +} +*/ +static irqreturn_t locomospi_testisr(int irq, void *dev_id) +{ + char *buf=""; + switch(irq){ + case IRQ_LOCOMO_SPI_RFR: buf="RFR"; + break; + case IRQ_LOCOMO_SPI_RFW: buf="RFW"; + break; + case IRQ_LOCOMO_SPI_REND:buf="REND"; + break; + case IRQ_LOCOMO_SPI_TEND:buf="TEND"; + break; + case IRQ_LOCOMO_CARDDETECT: + buf="CARD_DETECT"; + break; + default: return IRQ_NONE; + } + printk(KERN_DEBUG "locomospi: IRQ: %s\n",buf); +// dev_dbg(&spidev->sdev->dev, "IRQ: %s\n",buf); + return IRQ_HANDLED; +} +static irqreturn_t locomospi_txrxisr(int irq, void *dev_id) +{ + if(transfercount < transfersize){ + transrxbuf[transfercount++] = ioread8(spidev->base+LOCOMO_SPIRD); + iowrite8(transtxbuf[transfercount], spidev->base+LOCOMO_SPITD); + } + else{ + /* transfer complete. wake up txrx */ + wake_up(&transferqueue); + } + return IRQ_HANDLED; +} + +static irqreturn_t locomospi_txisr(int irq, void *dev_id) +{ + if(transfercount < transfersize){ + iowrite8(transtxbuf[transfercount++], spidev->base+LOCOMO_SPITD); + } + else{ + /* transfer complete. wake up txrx */ + wake_up(&transferqueue); + } + return IRQ_HANDLED; +} + +static irqreturn_t locomospi_rxisr(int irq, void *dev_id) +{ + if(transfercount < transfersize){ + transrxbuf[transfercount++] = ioread8(spidev->base+LOCOMO_SPIRD); + } + else{ + /* transfer complete. wake up txrx */ + wake_up(&transferqueue); + } + return IRQ_HANDLED; +} + +static void locomospi_clock(unsigned int Hz) +{ + u16 r; + printk(KERN_DEBUG "locomospi: changing clock to: %d\n", Hz); + if(Hz == 0){ + r = ioread16(spidev->base+LOCOMO_SPIMD); + r &= ~LOCOMO_SPI_XON; + iowrite16(r, spidev->base+LOCOMO_SPIMD); + } + else if(Hz >= 24576000){ + r = ioread16(spidev->base+LOCOMO_SPIMD); + r |= LOCOMO_SPI_XON; + iowrite16(r, spidev->base+LOCOMO_SPIMD); + locomospi_setclock(DIV_1, CLOCK_25MHZ); + delay=41; + } + else if(Hz >= 22579200){ + r = ioread16(spidev->base+LOCOMO_SPIMD); + r |= LOCOMO_SPI_XON; + iowrite16(r, spidev->base+LOCOMO_SPIMD); + locomospi_setclock(DIV_1, CLOCK_22MHZ); + delay=45; + } + else if(Hz >= 18432000){ + r = ioread16(spidev->base+LOCOMO_SPIMD); + r |= LOCOMO_SPI_XON; + iowrite16(r, spidev->base+LOCOMO_SPIMD); + locomospi_setclock(DIV_1, CLOCK_18MHZ); + delay=55; + } + else if(Hz >= 12288000){ + r = ioread16(spidev->base+LOCOMO_SPIMD); + r |= LOCOMO_SPI_XON; + iowrite16(r, spidev->base+LOCOMO_SPIMD); + locomospi_setclock(DIV_2, CLOCK_25MHZ); + delay=82; + } + else if(Hz >= 11289600){ + r = ioread16(spidev->base+LOCOMO_SPIMD); + r |= LOCOMO_SPI_XON; + iowrite16(r, spidev->base+LOCOMO_SPIMD); + locomospi_setclock(DIV_2, CLOCK_22MHZ); + delay=89; + } + else if(Hz >= 9216000){ + r = ioread16(spidev->base+LOCOMO_SPIMD); + r |= LOCOMO_SPI_XON; + iowrite16(r, spidev->base+LOCOMO_SPIMD); + locomospi_setclock(DIV_2, CLOCK_18MHZ); + delay=110; + } + else if(Hz >= 6144000){ + r = ioread16(spidev->base+LOCOMO_SPIMD); + r |= LOCOMO_SPI_XON; + iowrite16(r, spidev->base+LOCOMO_SPIMD); + locomospi_setclock(DIV_4, CLOCK_25MHZ); + delay=164; + } + else if(Hz >= 5644800){ + r = ioread16(spidev->base+LOCOMO_SPIMD); + r |= LOCOMO_SPI_XON; + iowrite16(r, spidev->base+LOCOMO_SPIMD); + locomospi_setclock(DIV_4, CLOCK_22MHZ); + delay=178; + } + else if(Hz >= 4608000){ + r = ioread16(spidev->base+LOCOMO_SPIMD); + r |= LOCOMO_SPI_XON; + iowrite16(r, spidev->base+LOCOMO_SPIMD); + locomospi_setclock(DIV_4, CLOCK_18MHZ); + delay=218; + } + else if(Hz >= 3072000){ + r = ioread16(spidev->base+LOCOMO_SPIMD); + r |= LOCOMO_SPI_XON; + iowrite16(r, spidev->base+LOCOMO_SPIMD); + locomospi_setclock(DIV_8, CLOCK_25MHZ); + delay=327; + } + else if(Hz >= 2822400){ + r = ioread16(spidev->base+LOCOMO_SPIMD); + r |= LOCOMO_SPI_XON; + iowrite16(r, spidev->base+LOCOMO_SPIMD); + locomospi_setclock(DIV_8, CLOCK_22MHZ); + delay=355; + } + else if(Hz >= 2304000){ + r = ioread16(spidev->base+LOCOMO_SPIMD); + r |= LOCOMO_SPI_XON; + iowrite16(r, spidev->base+LOCOMO_SPIMD); + locomospi_setclock(DIV_8, CLOCK_18MHZ); + delay=435; + } + else if(Hz >= 384000){ + r = ioread16(spidev->base+LOCOMO_SPIMD); + r |= LOCOMO_SPI_XON; + iowrite16(r, spidev->base+LOCOMO_SPIMD); + locomospi_setclock(DIV_64, CLOCK_25MHZ); + delay=2605; + } + else if(Hz >= 352800){ + r = ioread16(spidev->base+LOCOMO_SPIMD); + r |= LOCOMO_SPI_XON; + iowrite16(r, spidev->base+LOCOMO_SPIMD); + locomospi_setclock(DIV_64, CLOCK_22MHZ); + delay=2834; + } + else{ /* set to 288 KHz */ + r = ioread16(spidev->base+LOCOMO_SPIMD); + r |= LOCOMO_SPI_XON; + iowrite16(r, spidev->base+LOCOMO_SPIMD); + locomospi_setclock(DIV_64, CLOCK_18MHZ); + delay=3473; + } + spidev->clock = Hz; +} + +/* sysfs attributes used for debug *******************************************/ + +/* SPI registers */ +ssize_t locomospi_showspimd(struct device_driver *drv, char *buf) +{ + return sprintf(buf, "0x%x\n", ioread16(spidev->base+LOCOMO_SPIMD)); +} + +ssize_t locomospi_storespimd(struct device_driver *drv, const char *buf, size_t count) +{ + iowrite16(simple_strtoul(buf, NULL, 16), spidev->base+LOCOMO_SPIMD); + return count; +} +static DRIVER_ATTR(spimd, S_IWUSR | S_IRUGO, locomospi_showspimd, locomospi_storespimd); + +ssize_t locomospi_showspict(struct device_driver *drv, char *buf) +{ + return sprintf(buf, "0x%x\n", ioread16(spidev->base+LOCOMO_SPICT)); +} + +ssize_t locomospi_storespict(struct device_driver *drv, const char *buf, size_t count) +{ + iowrite16(simple_strtoul(buf, NULL, 16), spidev->base+LOCOMO_SPICT); + return count; +} +static DRIVER_ATTR(spict, S_IWUSR | S_IRUGO, locomospi_showspict, locomospi_storespict); + +ssize_t locomospi_showspist(struct device_driver *drv, char *buf) +{ + return sprintf(buf, "0x%x\n", ioread16(spidev->base+LOCOMO_SPIST)); +} + +ssize_t locomospi_storespist(struct device_driver *drv, const char *buf, size_t count) +{ + iowrite16(simple_strtoul(buf, NULL, 16), spidev->base+LOCOMO_SPIST); + return count; +} +static DRIVER_ATTR(spist, S_IWUSR | S_IRUGO, locomospi_showspist, locomospi_storespist); + +ssize_t locomospi_showspitd(struct device_driver *drv, char *buf) +{ + return sprintf(buf, "0x%x\n", ioread16(spidev->base+LOCOMO_SPITD)); +} + +ssize_t locomospi_storespitd(struct device_driver *drv, const char *buf, size_t count) +{ + iowrite16(simple_strtoul(buf, NULL, 16), spidev->base+LOCOMO_SPITD); + return count; +} +static DRIVER_ATTR(spitd, S_IWUSR | S_IRUGO, locomospi_showspitd, locomospi_storespitd); + +ssize_t locomospi_showspird(struct device_driver *drv, char *buf) +{ + return sprintf(buf, "0x%x\n", ioread16(spidev->base+LOCOMO_SPIRD)); +} + +ssize_t locomospi_storespird(struct device_driver *drv, const char *buf, size_t count) +{ + iowrite16(simple_strtoul(buf, NULL, 16), spidev->base+LOCOMO_SPIRD); + return count; +} +static DRIVER_ATTR(spird, S_IWUSR | S_IRUGO, locomospi_showspird, locomospi_storespird); + +ssize_t locomospi_showspits(struct device_driver *drv, char *buf) +{ + return sprintf(buf, "0x%x\n", ioread16(spidev->base+LOCOMO_SPITS)); +} + +ssize_t locomospi_storespits(struct device_driver *drv, const char *buf, size_t count) +{ + iowrite16(simple_strtoul(buf, NULL, 16), spidev->base+LOCOMO_SPITS); + return count; +} +static DRIVER_ATTR(spits, S_IWUSR | S_IRUGO, locomospi_showspits, locomospi_storespits); + +ssize_t locomospi_showspirs(struct device_driver *drv, char *buf) +{ + return sprintf(buf, "0x%x\n", ioread16(spidev->base+LOCOMO_SPIRS)); +} + +ssize_t locomospi_storespirs(struct device_driver *drv, const char *buf, size_t count) +{ + iowrite16(simple_strtoul(buf, NULL, 16), spidev->base+LOCOMO_SPIRS); + return count; +} +static DRIVER_ATTR(spirs, S_IWUSR | S_IRUGO, locomospi_showspirs, locomospi_storespirs); + +/* MMC Card status */ + +ssize_t locomospi_showpower(struct device_driver *drv, char *buf) +{ + return sprintf(buf, "%d\n", spidev->card_power); +} + +ssize_t locomospi_storepower(struct device_driver *drv, const char *buf, size_t count) +{ + locomospi_power(simple_strtoul(buf, NULL, 10)); + return count; +} +static DRIVER_ATTR(cardpower, S_IWUSR | S_IRUGO, locomospi_showpower, locomospi_storepower); + +ssize_t locomospi_detectcard(struct device_driver *drv, char *buf) +{ + return sprintf(buf, "%d\n",(locomo_gpio_read_level(spidev->ldev->dev.parent,LOCOMO_GPIO_CARD_DETECT)>0)?0:1); +} +static DRIVER_ATTR(carddetect, S_IRUGO, locomospi_detectcard, NULL); + +ssize_t locomospi_writeprotect(struct device_driver *drv, char *buf) +{ + return sprintf(buf, "%d\n",(locomo_gpio_read_level(spidev->ldev->dev.parent,LOCOMO_GPIO_WRITE_PROT)>0)?1:0); +} +static DRIVER_ATTR(cardwriteprotect, S_IRUGO, locomospi_writeprotect, NULL); + + +ssize_t locomospi_showclock(struct device_driver *drv, char *buf) +{ + return sprintf(buf, "%d\n", spidev->clock); +} + +ssize_t locomospi_storeclock(struct device_driver *drv, const char *buf, size_t count) +{ + locomospi_clock(simple_strtoul(buf, NULL, 10)); + return count; +} +static DRIVER_ATTR(clock, S_IWUSR | S_IRUGO, locomospi_showclock, locomospi_storeclock); + +/* debug */ +ssize_t locomospi_showdelay(struct device_driver *drv, char *buf) +{ + return sprintf(buf, "%d\n", delay); +} + +ssize_t locomospi_storedelay(struct device_driver *drv, const char *buf, size_t count) +{ + delay=simple_strtoul(buf,NULL,10); + return count; +} +static DRIVER_ATTR(delay, S_IWUSR | S_IRUGO, locomospi_showdelay, locomospi_storedelay); + +ssize_t locomospi_reset(struct device_driver *drv, const char *buf, size_t count) +{ + int choice = simple_strtoul(buf, NULL, 10); + char buff[100]; + u16 r; + switch(choice){ + case 0: locomospi_reg_release(); + schedule_timeout(2*HZ); + locomospi_reg_open(); + break; + case 1: { + char b1[] = "\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff"; + char b2[] = "\xff\x40\x00\x00\x00\x00\x95\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff"; + locomospi_setcs(1); + txrx(b1,b1,17); + locomospi_setcs(0); + txrx(b2,b2,18); + + } + break; + case 2: locomospi_setcs(1); + txrx("\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff",buff,18); + locomospi_setcs(0); + txrx("\xff\x40\x00\x00\x00\x00\x95\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff",buff,17); + break; + case 3: + r = ioread16(spidev->base+LOCOMO_SPIMD); + r |= LOCOMO_SPI_LOOPBACK; + iowrite16(r, spidev->base+LOCOMO_SPIMD); + txrx("X",buff,1); + txrx("abcdefghijklmnopqrstuvwxyz1234567890",buff,36); + txrx("Y",buff,1); + udelay(100); + txrx("Z",buff,1); + schedule_timeout(HZ); + txrx("abcdefghijklmnopqrstuvwxyz1234567890",buff,36); + + r = ioread16(spidev->base+LOCOMO_SPIMD); + r &= ~LOCOMO_SPI_LOOPBACK; + iowrite16(r, spidev->base+LOCOMO_SPIMD); + break; + default: /* do nothing */; + } + return count; +} +static DRIVER_ATTR(reset, S_IWUSR, NULL, locomospi_reset); + +typedef struct locomo_reg_entry { + u32 addr; + char* name; +} locomo_reg_entry_t; +#define LCM (sizeof(locomo_regs)/sizeof(locomo_reg_entry_t)) +static locomo_reg_entry_t locomo_regs[] = +{ +/* { addr, name, description } */ + { 0x00, "VER" }, + { 0x04, "ST" }, + { 0x08, "C32K" }, + { 0x0C, "ICR" }, + { 0x10, "MCSX0" }, + { 0x14, "MCSX1" }, + { 0x18, "MCSX2" }, + { 0x1C, "MCSX3" }, + { 0x20, "ASD" }, + { 0x28, "HSD" }, + { 0x2C, "HSC" }, + { 0x30, "TADC" }, + { 0x38, "TC" }, + { 0x3C, "CPSD" }, + { 0x40, "KIB" }, + { 0x44, "KSC" }, + { 0x48, "KCMD" }, + { 0x4C, "KIC" }, + { 0x54, "ACC" }, + { 0x60, "SPIMD" }, + { 0x64, "SPICT" }, + { 0x68, "SPIST" }, + { 0x70, "SPIIS" }, + { 0x74, "SPIWE" }, + { 0x78, "SPIIE" }, + { 0x7C, "SPIIR" }, + { 0x80, "SPITD" }, + { 0x84, "SPIRD" }, + { 0x88, "SPITS" }, + { 0x8C, "SPIRS" }, + { 0x90, "GPD" }, + { 0x94, "GPE" }, + { 0x98, "GPL" }, + { 0x9C, "GPO" }, + { 0xa0, "GRIE" }, + { 0xa4, "GFIE" }, + { 0xa8, "GIS" }, + { 0xac, "GWE" }, + { 0xb0, "GIE" }, + { 0xb4, "GIR" }, + { 0xc8, "ALC" }, + { 0xcc, "ALR" }, + { 0xd0, "PAIF" }, + { 0xd8, "LTC" }, + { 0xdc, "LTINT" }, + { 0xe0, "DAC" }, + { 0xe8, "LPT0" }, + { 0xec, "LPT1" }, + { 0xfc, "TCR" }, +}; + +static ssize_t lcm_show(struct device *dev, struct device_attribute *attr, char *buf) +{ + int base = spidev->base - LOCOMO_SPI; + char b[4000]=""; + char c[30]; + int i; + for(i=0; imessage_list){ + msg = list_entry(mptr, struct spi_message, queue); + + msg->status = 0; + msg->actual_length = 0; + list_for_each(tptr, &msg->transfers){ + entry = list_entry(tptr, struct spi_transfer, transfer_list); + if(entry->tx_buf && entry->rx_buf){ //duplex + txrx((char*) entry->tx_buf, (char*) entry->rx_buf, entry->len); + msg->actual_length += entry->len; + } else if(entry->tx_buf && !entry->rx_buf){ //write + tx((char*) entry->tx_buf, entry->len); + msg->actual_length += entry->len; + } else if(!entry->tx_buf && entry->rx_buf){ //read + rx((char*) entry->rx_buf, entry->len); + msg->actual_length += entry->len; + } else if(!entry->tx_buf && !entry->rx_buf){ //error + dev_err(&spidev->sdev->dev, "do_transfer: no buffers allocated\n"); + msg->status = -EFAULT; + } + } + spin_lock(&spidev->message_lock); + list_del(mptr); + spin_unlock(&spidev->message_lock); + msg->complete(msg->context); + } +} + +static int locomospi_setup(struct spi_device *spi) +{ + if((spi->mode & SPI_CS_HIGH) != (spidev->spimode & SPI_CS_HIGH)) + locomospi_setcs(spi->mode & SPI_CS_HIGH ? 1 : 0 ); + if(spidev->clock != spi->max_speed_hz){ + locomospi_clock(spi->max_speed_hz); + } + spidev->spimode = spi->mode; + + return 0; +} + +static int locomospi_transfer(struct spi_device *spi, struct spi_message *msg) +{ + + spin_lock(&spidev->message_lock); + list_add_tail(&msg->queue, &spidev->message_list); + spin_unlock(&spidev->message_lock); + schedule_work(&transfer_wq); + return 0; +} + +static struct locomo_driver locomo_spi_driver = { + .drv = { + .name = "locomo-spi", + }, + .devid = LOCOMO_DEVID_SPI, + .probe = locomospi_probe, + .remove = locomospi_remove, +#ifdef CONFIG_PM + .suspend = locomospi_suspend, + .resume = locomospi_resume, +#endif +}; + +static struct spi_board_info board = { + .modalias = "mmc_spi", + .platform_data = (void*) &colliemmc, + .controller_data= NULL, + .irq = 0, + .max_speed_hz = 25000000, + .bus_num = 0, + .chip_select = 0, + .mode = 0, +}; + +#ifdef CONFIG_PM +static int locomospi_suspend(struct locomo_dev *dev, pm_message_t state) +{ + disable_irq(IRQ_LOCOMO_CARDDETECT); + return 0; +} + +static int locomospi_resume(struct locomo_dev *dev) +{ + enable_irq(IRQ_LOCOMO_CARDDETECT); + return 0; +} +#endif + +static int locomospi_probe(struct locomo_dev *dev) +{ + int result=0; + printk(KERN_DEBUG "Collie MMC over SPI Driver\n"); + spidev=kmalloc(sizeof(struct locomospi_dev),GFP_KERNEL); + if(!spidev){ + return -ENOMEM; + } + spidev->ldev = dev; + spidev->card_power = 1; + spidev->spimode = 0; + + if(!request_mem_region((unsigned long) dev->mapbase, dev->length, LOCOMO_DRIVER_NAME(dev))) { + dev_err(&dev->dev, " Can't aquire access to io memory\n"); + return -EBUSY; + } + spidev->base=(unsigned long) dev->mapbase; + locomospi_reg_open(); + + locomo_gpio_set_dir(dev->dev.parent, LOCOMO_GPIO_CARD_POWER, 0); + locomo_gpio_set_dir(dev->dev.parent, LOCOMO_GPIO_CARD_DETECT, 1); + locomo_gpio_set_dir(dev->dev.parent, LOCOMO_GPIO_WRITE_PROT, 1); + + result=driver_create_file(&locomo_spi_driver.drv, &driver_attr_cardpower); + if(result){ + dev_err(&dev->dev, "error creating driver attribute\n"); + goto region; + } + result=driver_create_file(&locomo_spi_driver.drv, &driver_attr_carddetect); + if(result){ + dev_err(&dev->dev,"error creating driver attribute\n"); + goto region; + } + result=driver_create_file(&locomo_spi_driver.drv, &driver_attr_cardwriteprotect); + if(result){ + dev_err(&dev->dev, "error creating driver attribute\n"); + goto region; + } + result=driver_create_file(&locomo_spi_driver.drv, &driver_attr_spimd); + if(result){ + dev_err(&dev->dev, "error creating driver attribute\n"); + goto region; + } + result=driver_create_file(&locomo_spi_driver.drv, &driver_attr_spict); + if(result){ + dev_err(&dev->dev, "error creating driver attribute\n"); + goto region; + } + result=driver_create_file(&locomo_spi_driver.drv, &driver_attr_spist); + if(result){ + dev_err(&dev->dev, "error creating driver attribute\n"); + goto region; + } + result=driver_create_file(&locomo_spi_driver.drv, &driver_attr_spitd); + if(result){ + dev_err(&dev->dev, "error creating driver attribute\n"); + goto region; + } + result=driver_create_file(&locomo_spi_driver.drv, &driver_attr_spird); + if(result){ + dev_err(&dev->dev, "error creating driver attribute\n"); + goto region; + } + result=driver_create_file(&locomo_spi_driver.drv, &driver_attr_spits); + if(result){ + dev_err(&dev->dev, "error creating driver attribute\n"); + goto region; + } + result=driver_create_file(&locomo_spi_driver.drv, &driver_attr_spirs); + if(result){ + dev_err(&dev->dev, "error creating driver attribute\n"); + goto region; + } + result=driver_create_file(&locomo_spi_driver.drv, &driver_attr_clock); + if(result){ + dev_err(&dev->dev, "error creating driver attribute\n"); + goto region; + } + result=driver_create_file(&locomo_spi_driver.drv, &driver_attr_delay); + if(result){ + dev_err(&dev->dev, "error creating driver attribute\n"); + goto region; + } + result=driver_create_file(&locomo_spi_driver.drv, &driver_attr_reset); + if(result){ + dev_err(&dev->dev, "error creating driver attribute\n"); + goto region; + } + result=driver_create_file(&locomo_spi_driver.drv, &driver_attr_regs); + if(result){ + dev_err(&dev->dev, "error creating driver attribute\n"); + goto region; + } + INIT_WORK(&transfer_wq, locomospi_do_transfer); + INIT_LIST_HEAD(&spidev->message_list); + spin_lock_init(&spidev->message_lock); + init_waitqueue_head(&spidev->waitqueue); + spidev->master=spi_alloc_master(&dev->dev,0); + if(!spidev->master){ + result=-ENOMEM; + goto region; + } + spidev->master->bus_num = 0; + spidev->master->num_chipselect = 1; + spidev->master->setup = locomospi_setup; + spidev->master->transfer = locomospi_transfer; + spidev->sdev = spi_new_device(spidev->master, &board); + if(!spidev->sdev){ + dev_err(&dev->dev, "failed to register spi device\n"); + result = -EINVAL; + goto master; + } +/* result=request_irq(IRQ_LOCOMO_SPI_RFR, locomospi_testisr, IRQF_SHARED, "locomo-spi", (void*) spidev); + if(result) { + dev_err(&dev->dev, "Could not get IRQ: RFR\n"); + goto regdev; + } + //disable_irq(IRQ_LOCOMO_SPI_RFR); +*//* result=request_irq(IRQ_LOCOMO_SPI_RFW, locomospi_testisr, IRQF_SHARED, "locomo-spi", (void*) spidev); + if(result) { + dev_err(&dev->dev, "Could not get IRQ: RFW\n"); + goto irq1; + } + //disable_irq(IRQ_LOCOMO_SPI_RFW); +*//* result=request_irq(IRQ_LOCOMO_SPI_REND, locomospi_testisr, IRQF_SHARED, "locomo-spi", (void*) spidev); + if(result) { + dev_err(&dev->dev, "Could not get IRQ: REND\n"); + goto irq2; + } +*//* result=request_irq(IRQ_LOCOMO_SPI_TEND, locomospi_testisr, IRQF_SHARED, "locomo-spi", (void*) spidev); + if(result) { + dev_err(&dev->dev, "Could not get IRQ: TEND\n"); + goto irq3; + } + //disable_irq(IRQ_LOCOMO_SPI_TEND); +*/ spidev->workqueue = create_singlethread_workqueue("locomo-spi"); + if(!spidev->workqueue){ + dev_err(&dev->dev, "failed to create workqueue\n"); + goto irq4; + } + result=spi_register_master(spidev->master); + if(result){ + dev_err(&dev->dev, "failed to register spimaster\n"); + goto wq; + } + return 0; +wq: + destroy_workqueue(spidev->workqueue); +irq4: +// free_irq(IRQ_LOCOMO_SPI_TEND, (void*) spidev); +irq3: +// free_irq(IRQ_LOCOMO_SPI_REND, (void*) spidev); +irq2: +// free_irq(IRQ_LOCOMO_SPI_RFW, (void*) spidev); +irq1: +// free_irq(IRQ_LOCOMO_SPI_RFR, (void*) spidev); +regdev: + spi_unregister_device(spidev->sdev); +master: + spi_master_put(spidev->master); +region: + release_mem_region((unsigned long) dev->mapbase, dev->length); + kfree(spidev); + return result; + +} + +static int locomospi_remove(struct locomo_dev *dev) +{ + spi_unregister_device(spidev->sdev); + spi_unregister_master(spidev->master); + destroy_workqueue(spidev->workqueue); + locomospi_reg_release(); +// free_irq(IRQ_LOCOMO_SPI_TEND, (void*) spidev); +// free_irq(IRQ_LOCOMO_SPI_REND, (void*) spidev); +// free_irq(IRQ_LOCOMO_SPI_RFW, (void*) spidev); +// free_irq(IRQ_LOCOMO_SPI_RFR, (void*) spidev); + spi_master_put(spidev->master); + release_mem_region((unsigned long) dev->mapbase, dev->length); + kfree(spidev); + return 0; +} + + + +static int __init locomospi_init(void) +{ + int ret = locomo_driver_register(&locomo_spi_driver); + if (ret) + return ret; + + + return 0; +} + +static void __exit locomospi_exit(void) +{ + locomo_driver_unregister(&locomo_spi_driver); +} + +module_init(locomospi_init); +module_exit(locomospi_exit); + +MODULE_AUTHOR("Thomas Kunze thommy@tabao.de"); +MODULE_DESCRIPTION("Collie mmc driver"); +MODULE_LICENSE("GPL"); diff --git a/drivers/spi/locomo_spi.h b/drivers/spi/locomo_spi.h new file mode 100644 index 0000000..7e1c0ce --- /dev/null +++ b/drivers/spi/locomo_spi.h @@ -0,0 +1,75 @@ +#include +#ifndef __LOCOMO_SPI_H__ +#define __LOCOMO_SPI_H__ + +/* locomo-spi status register LOCOMO_SPIST */ +#define LOCOMO_SPI_TEND (1 << 3) /* Transfer end bit */ +#define LOCOMO_SPI_REND (1 << 2) /* Receive end bit */ +#define LOCOMO_SPI_RFW (1 << 1) /* write buffer bit */ +#define LOCOMO_SPI_RFR (1) /* read buffer bit */ + +/* locomo-spi mode register LOCOMO_SPIMD */ +#define LOCOMO_SPI_LOOPBACK (1 << 15) /* loopback tx to rx */ +#define LOCOMO_SPI_MSB1ST (1 << 14) /* send MSB first */ +#define LOCOMO_SPI_DOSTAT (1 << 13) /* transmit line is idle high */ +#define LOCOMO_SPI_TCPOL (1 << 11) /* transmit CPOL (maybe affects CPHA too) */ +#define LOCOMO_SPI_RCPOL (1 << 10) /* receive CPOL (maybe affects CPHA too) */ +#define LOCOMO_SPI_TDINV (1 << 9) /* invert transmit line */ +#define LOCOMO_SPI_RDINV (1 << 8) /* invert receive line */ +#define LOCOMO_SPI_XON (1 << 7) /* enable spi controller clock */ +#define LOCOMO_SPI_XEN (1 << 6) /* clock bit write enable xon must be off, wait 300 us before xon->1 */ +#define LOCOMO_SPI_XSEL 0x0018 /* clock select */ +#define CLOCK_18MHZ 0 /* 18,432 MHz clock */ +#define CLOCK_22MHZ 1 /* 22,5792 MHz clock */ +#define CLOCK_25MHZ 2 /* 24,576 MHz clock */ +#define LOCOMO_SPI_CLKSEL 0x7 +#define DIV_1 0 /* don't divide clock */ +#define DIV_2 1 /* divide clock by two */ +#define DIV_4 2 /* divide clock by four */ +#define DIV_8 3 /* divide clock by eight*/ +#define DIV_64 4 /* divide clock by 64 */ + +/* locomo-spi control register LOCOMO_SPICT */ +#define LOCOMO_SPI_CRC16_7_B (1 << 15) /* 0: crc16 1: crc7 */ +#define LOCOMO_SPI_CRCRX_TX_B (1 << 14) +#define LOCOMO_SPI_CRCRESET_B (1 << 13) +#define LOCOMO_SPI_CEN (1 << 7) /* ?? enable */ +#define LOCOMO_SPI_CS (1 << 6) /* chip select */ +#define LOCOMO_SPI_UNIT16 (1 << 5) /* 0: 8 bit units, 1: 16 bit unit */ +#define LOCOMO_SPI_ALIGNEN (1 << 2) /* align transfer enable */ +#define LOCOMO_SPI_RXWEN (1 << 1) /* continous receive */ +#define LOCOMO_SPI_RXUEN (1 << 0) /* aligned receive */ + +#define IRQ_LOCOMO_CARDDETECT IRQ_LOCOMO_GPIO13 + + +struct locomospi_dev { + struct locomo_dev *ldev; + struct spi_master *master; + struct spi_device *sdev; + int card_power; + int clock_base; + int clock_div; + int clock; + unsigned long base; + u8 spimode; + wait_queue_head_t waitqueue; + struct workqueue_struct *workqueue; + struct list_head message_list; + spinlock_t message_lock; +}; + + +static irqreturn_t locomospi_cardisr(int, void*); +static int locomospi_probe(struct locomo_dev*); +static int locomospi_remove(struct locomo_dev*); +static int locomospi_carddetect(void); +static void locomospi_reg_open(void); +static void locomospi_reg_release(void); +static int tx(const char*, int); +static int rx(char *, int); +static void locomospi_power(int on); +static int locomospi_suspend(struct locomo_dev *dev, pm_message_t state); +static int locomospi_resume(struct locomo_dev *dev); +static void locomospi_setcs(int high); +#endif -- 1.5.6.5