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Diffstat (limited to 'arch/mips/tx4938/toshiba_rbtx4938/spi_txx9.c')
-rw-r--r--arch/mips/tx4938/toshiba_rbtx4938/spi_txx9.c164
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 08b20cdfd7b..00000000000
--- 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;
-}