diff options
Diffstat (limited to '')
| -rw-r--r-- | arch/mips/tx4938/toshiba_rbtx4938/spi_txx9.c | 164 |
1 files changed, 0 insertions, 164 deletions
diff --git a/arch/mips/tx4938/toshiba_rbtx4938/spi_txx9.c b/arch/mips/tx4938/toshiba_rbtx4938/spi_txx9.c deleted file mode 100644 index 08b20cdfd7b3..000000000000 --- a/arch/mips/tx4938/toshiba_rbtx4938/spi_txx9.c +++ /dev/null @@ -1,164 +0,0 @@ -/* - * linux/arch/mips/tx4938/toshiba_rbtx4938/spi_txx9.c - * Copyright (C) 2000-2001 Toshiba Corporation - * - * 2003-2005 (c) MontaVista Software, Inc. This file is licensed under the - * terms of the GNU General Public License version 2. This program is - * licensed "as is" without any warranty of any kind, whether express - * or implied. - * - * Support for TX4938 in 2.6 - Manish Lachwani (mlachwani@mvista.com) - */ -#include <linux/init.h> -#include <linux/delay.h> -#include <linux/errno.h> -#include <linux/interrupt.h> -#include <linux/module.h> -#include <linux/sched.h> -#include <linux/spinlock.h> -#include <linux/wait.h> -#include <asm/tx4938/spi.h> -#include <asm/tx4938/tx4938.h> - -static int (*txx9_spi_cs_func)(int chipid, int on); -static DEFINE_SPINLOCK(txx9_spi_lock); - -extern unsigned int txx9_gbus_clock; - -#define SPI_FIFO_SIZE 4 - -void __init txx9_spi_init(unsigned long base, int (*cs_func)(int chipid, int on)) -{ - txx9_spi_cs_func = cs_func; - /* enter config mode */ - tx4938_spiptr->mcr = TXx9_SPMCR_CONFIG | TXx9_SPMCR_BCLR; -} - -static DECLARE_WAIT_QUEUE_HEAD(txx9_spi_wait); - -static irqreturn_t txx9_spi_interrupt(int irq, void *dev_id) -{ - /* disable rx intr */ - tx4938_spiptr->cr0 &= ~TXx9_SPCR0_RBSIE; - wake_up(&txx9_spi_wait); - - return IRQ_HANDLED; -} - -static struct irqaction txx9_spi_action = { - .handler = txx9_spi_interrupt, - .name = "spi", -}; - -void __init txx9_spi_irqinit(int irc_irq) -{ - setup_irq(irc_irq, &txx9_spi_action); -} - -int txx9_spi_io(int chipid, struct spi_dev_desc *desc, - unsigned char **inbufs, unsigned int *incounts, - unsigned char **outbufs, unsigned int *outcounts, - int cansleep) -{ - unsigned int incount, outcount; - unsigned char *inp, *outp; - int ret; - unsigned long flags; - - spin_lock_irqsave(&txx9_spi_lock, flags); - if ((tx4938_spiptr->mcr & TXx9_SPMCR_OPMODE) == TXx9_SPMCR_ACTIVE) { - spin_unlock_irqrestore(&txx9_spi_lock, flags); - return -EBUSY; - } - /* enter config mode */ - tx4938_spiptr->mcr = TXx9_SPMCR_CONFIG | TXx9_SPMCR_BCLR; - tx4938_spiptr->cr0 = - (desc->byteorder ? TXx9_SPCR0_SBOS : 0) | - (desc->polarity ? TXx9_SPCR0_SPOL : 0) | - (desc->phase ? TXx9_SPCR0_SPHA : 0) | - 0x08; - tx4938_spiptr->cr1 = - (((TXX9_IMCLK + desc->baud) / (2 * desc->baud) - 1) << 8) | - 0x08 /* 8 bit only */; - /* enter active mode */ - tx4938_spiptr->mcr = TXx9_SPMCR_ACTIVE; - spin_unlock_irqrestore(&txx9_spi_lock, flags); - - /* CS ON */ - if ((ret = txx9_spi_cs_func(chipid, 1)) < 0) { - spin_unlock_irqrestore(&txx9_spi_lock, flags); - return ret; - } - udelay(desc->tcss); - - /* do scatter IO */ - inp = inbufs ? *inbufs : NULL; - outp = outbufs ? *outbufs : NULL; - incount = 0; - outcount = 0; - while (1) { - unsigned char data; - unsigned int count; - int i; - if (!incount) { - incount = incounts ? *incounts++ : 0; - inp = (incount && inbufs) ? *inbufs++ : NULL; - } - if (!outcount) { - outcount = outcounts ? *outcounts++ : 0; - outp = (outcount && outbufs) ? *outbufs++ : NULL; - } - if (!inp && !outp) - break; - count = SPI_FIFO_SIZE; - if (incount) - count = min(count, incount); - if (outcount) - count = min(count, outcount); - - /* now tx must be idle... */ - while (!(tx4938_spiptr->sr & TXx9_SPSR_SIDLE)) - ; - - tx4938_spiptr->cr0 = - (tx4938_spiptr->cr0 & ~TXx9_SPCR0_RXIFL_MASK) | - ((count - 1) << 12); - if (cansleep) { - /* enable rx intr */ - tx4938_spiptr->cr0 |= TXx9_SPCR0_RBSIE; - } - /* send */ - for (i = 0; i < count; i++) - tx4938_spiptr->dr = inp ? *inp++ : 0; - /* wait all rx data */ - if (cansleep) { - wait_event(txx9_spi_wait, - tx4938_spiptr->sr & TXx9_SPSR_SRRDY); - } else { - while (!(tx4938_spiptr->sr & TXx9_SPSR_RBSI)) - ; - } - /* receive */ - for (i = 0; i < count; i++) { - data = tx4938_spiptr->dr; - if (outp) - *outp++ = data; - } - if (incount) - incount -= count; - if (outcount) - outcount -= count; - } - - /* CS OFF */ - udelay(desc->tcsh); - txx9_spi_cs_func(chipid, 0); - udelay(desc->tcsr); - - spin_lock_irqsave(&txx9_spi_lock, flags); - /* enter config mode */ - tx4938_spiptr->mcr = TXx9_SPMCR_CONFIG | TXx9_SPMCR_BCLR; - spin_unlock_irqrestore(&txx9_spi_lock, flags); - - return 0; -} |