[PATCH] 8xx: port i2c-algo-8xx to 2.6
Aristeu Sergio Rozanski Filho
aris at cathedrallabs.org
Sun Aug 7 04:01:31 EST 2005
8xx: port i2c-algo_8xx to 2.6
Based on Tom Rini's work
compile tested
Signed-off-by: Aristeu Sergio Rozanski Filho <aris at cathedrallabs.org>
Index: 2.6-8xx/drivers/i2c/algos/i2c-algo-8xx.c
===================================================================
--- /dev/null 1970-01-01 00:00:00.000000000 +0000
+++ 2.6-8xx/drivers/i2c/algos/i2c-algo-8xx.c 2005-08-05 17:16:08.000000000 -0300
@@ -0,0 +1,625 @@
+/*
+ * i2c-algo-8xx.c i2x driver algorithms for MPC8XX CPM
+ * Copyright (c) 1999 Dan Malek (dmalek at jlc.net).
+ *
+ 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., 675 Mass Ave, Cambridge, MA 02139, USA.
+ *
+ * moved into proper i2c interface; separated out platform specific
+ * parts into i2c-rpx.c
+ * Brad Parker (brad at heeltoe.com)
+ */
+
+// XXX todo
+// timeout sleep?
+
+/* $Id: i2c-algo-8xx.c,v 1.7 2002/08/03 22:48:18 ac9410 Exp $ */
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/delay.h>
+#include <linux/slab.h>
+#include <linux/version.h>
+#include <linux/init.h>
+#include <asm/uaccess.h>
+#include <linux/ioport.h>
+#include <linux/errno.h>
+#include <linux/sched.h>
+
+#include <asm/mpc8xx.h>
+#include <asm/commproc.h>
+
+#include <linux/i2c.h>
+#include <linux/i2c-algo-8xx.h>
+
+#define CPM_MAX_READ 513
+/* Try uncomment this if you have an older CPU(earlier than rev D4) */
+/* #define I2C_CHIP_ERRATA */
+
+static char *module_name = "i2c_algo_8xx";
+#define DEBUGP(level, x, y...) do { \
+ if (cpm_debug >= level) \
+ printk(KERN_DEBUG "%s: " x, \
+ module_name, ## y); \
+ } while(0)
+
+static wait_queue_head_t iic_wait;
+static ushort r_tbase, r_rbase;
+
+int cpm_scan = 0;
+int cpm_debug = 0;
+
+static void
+cpm_iic_interrupt(void *dev_id, struct pt_regs *regs)
+ {
+ volatile i2c8xx_t *i2c = (i2c8xx_t *)dev_id;
+
+ DEBUGP(2, "cpm_iic_interrupt(dev_id=%p)\n", dev_id);
+
+#ifdef I2C_CHIP_ERRATA
+ /* Chip errata, clear enable.
+ * This seems to not be needed on rev D4 or newer CPUs.
+ * Someone with an older CPU needs to verify this.
+ */
+ i2c->i2c_i2mod &= ~1;
+#endif
+
+ /* Clear interrupt.
+ */
+ i2c->i2c_i2cer = 0xff;
+
+ /* Get 'me going again.
+ */
+ wake_up_interruptible(&iic_wait);
+}
+
+static void
+cpm_iic_init(struct i2c_algo_8xx_data *cpm_adap)
+{
+ volatile iic_t *iip = cpm_adap->iip;
+ volatile i2c8xx_t *i2c = cpm_adap->i2c;
+ unsigned char brg;
+ bd_t *bd = (bd_t *)__res;
+
+ DEBUGP(1, "cpm_iic_init() - iip=%p\n", iip);
+
+ /* Initialize the parameter ram.
+ * We need to make sure many things are initialized to zero,
+ * especially in the case of a microcode patch.
+ */
+ iip->iic_rstate = 0;
+ iip->iic_rdp = 0;
+ iip->iic_rbptr = 0;
+ iip->iic_rbc = 0;
+ iip->iic_rxtmp = 0;
+ iip->iic_tstate = 0;
+ iip->iic_tdp = 0;
+ iip->iic_tbptr = 0;
+ iip->iic_tbc = 0;
+ iip->iic_txtmp = 0;
+
+ /* Set up the IIC parameters in the parameter ram.
+ */
+ iip->iic_tbase = r_tbase = cpm_adap->dp_addr;
+ iip->iic_rbase = r_rbase = cpm_adap->dp_addr + sizeof(cbd_t) * 2;
+
+ iip->iic_tfcr = SMC_EB;
+ iip->iic_rfcr = SMC_EB;
+
+ /* Set maximum receive size.
+ */
+ iip->iic_mrblr = CPM_MAX_READ;
+
+ /* Initialize Tx/Rx parameters.
+ */
+ if (cpm_adap->reloc == 0) {
+ volatile cpm8xx_t *cp = cpm_adap->cp;
+
+ cp->cp_cpcr =
+ mk_cr_cmd(CPM_CR_CH_I2C, CPM_CR_INIT_TRX) | CPM_CR_FLG;
+ while (cp->cp_cpcr & CPM_CR_FLG);
+ } else {
+ iip->iic_rbptr = iip->iic_rbase;
+ iip->iic_tbptr = iip->iic_tbase;
+ iip->iic_rstate = 0;
+ iip->iic_tstate = 0;
+ }
+
+ /* Select an arbitrary address. Just make sure it is unique.
+ */
+ i2c->i2c_i2add = 0xfe;
+
+ /* Make clock run at 60 KHz.
+ */
+ brg = (unsigned char) (bd->bi_intfreq/(32*2*60000) -3);
+ i2c->i2c_i2brg = brg;
+
+ i2c->i2c_i2mod = 0x00;
+ i2c->i2c_i2com = 0x01; /* Master mode */
+
+ /* Disable interrupts.
+ */
+ i2c->i2c_i2cmr = 0;
+ i2c->i2c_i2cer = 0xff;
+
+ init_waitqueue_head(&iic_wait);
+
+ /* Install interrupt handler.
+ */
+ DEBUGP(1, "Install ISR for IRQ %d\n", CPMVEC_I2C);
+ cpm_install_handler(CPMVEC_I2C, cpm_iic_interrupt, (void *)i2c);
+}
+
+
+static int
+cpm_iic_shutdown(struct i2c_algo_8xx_data *cpm_adap)
+{
+ volatile i2c8xx_t *i2c = cpm_adap->i2c;
+
+ /* Shut down IIC.
+ */
+ i2c->i2c_i2mod &= ~1;
+ i2c->i2c_i2cmr = 0;
+ i2c->i2c_i2cer = 0xff;
+
+ return 0;
+}
+
+static void
+cpm_reset_iic_params(volatile iic_t *iip)
+{
+ iip->iic_tbase = r_tbase;
+ iip->iic_rbase = r_rbase;
+
+ iip->iic_tfcr = SMC_EB;
+ iip->iic_rfcr = SMC_EB;
+
+ iip->iic_mrblr = CPM_MAX_READ;
+
+ iip->iic_rstate = 0;
+ iip->iic_rdp = 0;
+ iip->iic_rbptr = iip->iic_rbase;
+ iip->iic_rbc = 0;
+ iip->iic_rxtmp = 0;
+ iip->iic_tstate = 0;
+ iip->iic_tdp = 0;
+ iip->iic_tbptr = iip->iic_tbase;
+ iip->iic_tbc = 0;
+ iip->iic_txtmp = 0;
+}
+
+#define BD_SC_NAK ((ushort)0x0004) /* NAK - did not respond */
+#define BD_SC_OV ((ushort)0x0002) /* OV - receive overrun */
+#define CPM_CR_CLOSE_RXBD ((ushort)0x0007)
+
+static void force_close(struct i2c_algo_8xx_data *cpm)
+{
+ volatile i2c8xx_t *i2c = cpm->i2c;
+ if (cpm->reloc == 0) { /* micro code disabled */
+ volatile cpm8xx_t *cp = cpm->cp;
+
+ DEBUGP(1, "force_close()\n");
+ cp->cp_cpcr =
+ mk_cr_cmd(CPM_CR_CH_I2C, CPM_CR_CLOSE_RXBD) |
+ CPM_CR_FLG;
+
+ while (cp->cp_cpcr & CPM_CR_FLG);
+ }
+ i2c->i2c_i2cmr = 0x00; /* Disable all interrupts */
+ i2c->i2c_i2cer = 0xff;
+}
+
+
+/* Read from IIC...
+ * abyte = address byte, with r/w flag already set
+ */
+static int
+cpm_iic_read(struct i2c_algo_8xx_data *cpm, u_char abyte, char *buf, int count)
+{
+ volatile iic_t *iip = cpm->iip;
+ volatile i2c8xx_t *i2c = cpm->i2c;
+ volatile cpm8xx_t *cp = cpm->cp;
+ volatile cbd_t *tbdf, *rbdf;
+ u_char *tb;
+ unsigned long flags, tmo;
+
+ if (count >= CPM_MAX_READ)
+ return -EINVAL;
+
+ /* check for and use a microcode relocation patch */
+ if (cpm->reloc)
+ cpm_reset_iic_params(iip);
+
+ tbdf = (cbd_t *)&cp->cp_dpmem[iip->iic_tbase];
+ rbdf = (cbd_t *)&cp->cp_dpmem[iip->iic_rbase];
+
+ /* To read, we need an empty buffer of the proper length.
+ * All that is used is the first byte for address, the remainder
+ * is just used for timing (and doesn't really have to exist).
+ */
+ tb = cpm->temp;
+ tb = (u_char *)(((uint)tb + 15) & ~15);
+ tb[0] = abyte; /* Device address byte w/rw flag */
+
+ flush_dcache_range((unsigned long) tb, (unsigned long) (tb + 1));
+
+ DEBUGP(1, "cpm_iic_read(abyte=0x%x)\n", abyte);
+
+ tbdf->cbd_bufaddr = __pa(tb);
+ tbdf->cbd_datlen = count + 1;
+ tbdf->cbd_sc =
+ BD_SC_READY | BD_SC_LAST |
+ BD_SC_WRAP | BD_IIC_START;
+
+ iip->iic_mrblr = count + 1; /* prevent excessive read, +1
+ is needed otherwise will the
+ RXB interrupt come too early */
+
+ /* flush will invalidate too. */
+ flush_dcache_range((unsigned long) buf, (unsigned long) (buf+count));
+
+ rbdf->cbd_datlen = 0;
+ rbdf->cbd_bufaddr = __pa(buf);
+
+ rbdf->cbd_sc = BD_SC_EMPTY | BD_SC_WRAP| BD_SC_INTRPT;
+ if(count > 16){
+ /* Chip bug, set enable here */
+ local_irq_save(flags);
+ i2c->i2c_i2cmr = 0x13; /* Enable some interupts */
+ i2c->i2c_i2cer = 0xff;
+ i2c->i2c_i2mod |= 1; /* Enable */
+ i2c->i2c_i2com |= 0x80; /* Begin transmission */
+
+ /* Wait for IIC transfer */
+ tmo = interruptible_sleep_on_timeout(&iic_wait,1*HZ);
+ local_irq_restore(flags);
+ } else { /* busy wait for small transfers, its faster */
+ i2c->i2c_i2cmr = 0x00; /* Disable I2C interupts */
+ i2c->i2c_i2cer = 0xff;
+ i2c->i2c_i2mod |= 1; /* Enable */
+ i2c->i2c_i2com |= 0x80; /* Begin transmission */
+ tmo = jiffies + 1*HZ;
+ /* Busy wait, with a timeout */
+ while(!(i2c->i2c_i2cer & 0x11 || time_after(jiffies, tmo)));
+ }
+
+ if (signal_pending(current) || !tmo){
+ force_close(cpm);
+ DEBUGP(1, "IIC read: timeout!\n");
+ return -EIO;
+ }
+#ifdef I2C_CHIP_ERRATA
+ /* Chip errata, clear enable. This is not needed on rev D4 CPUs.
+ Disabling I2C too early may cause too short stop condition */
+ udelay(4);
+ i2c->i2c_i2mod &= ~1;
+#endif
+
+ DEBUGP(1, "tx sc %04x, rx sc %04x\n", tbdf->cbd_sc, rbdf->cbd_sc);
+
+ if (tbdf->cbd_sc & BD_SC_READY) {
+ printk(KERN_INFO "IIC read; complete but tbuf ready\n");
+ force_close(cpm);
+ printk(KERN_INFO "tx sc %04x, rx sc %04x\n",
+ tbdf->cbd_sc, rbdf->cbd_sc);
+ }
+
+ if (tbdf->cbd_sc & BD_SC_NAK) {
+ DEBUGP(1, "IIC read; no ack\n");
+ return -EREMOTEIO;
+ }
+
+ if (rbdf->cbd_sc & BD_SC_EMPTY) {
+ /* force_close(cpm); */
+ DEBUGP(1, "IIC read; complete but rbuf empty\n");
+ DEBUGP(1, "tx sc %04x, rx sc %04x\n", tbdf->cbd_sc, rbdf->cbd_sc);
+ return -EREMOTEIO;
+ }
+
+ if (rbdf->cbd_sc & BD_SC_OV) {
+ DEBUGP(1, "IIC read; Overrun\n");
+ return -EREMOTEIO;;
+ }
+
+ DEBUGP(1, "read %d bytes\n", rbdf->cbd_datlen);
+
+ if (rbdf->cbd_datlen < count) {
+ DEBUGP(1, "IIC read; short, wanted %d got %d\n", count,
+ rbdf->cbd_datlen);
+ return 0;
+ }
+
+ return count;
+}
+
+/* Write to IIC...
+ * addr = address byte, with r/w flag already set
+ */
+static int
+cpm_iic_write(struct i2c_algo_8xx_data *cpm, u_char abyte, char *buf,int count)
+{
+ volatile iic_t *iip = cpm->iip;
+ volatile i2c8xx_t *i2c = cpm->i2c;
+ volatile cpm8xx_t *cp = cpm->cp;
+ volatile cbd_t *tbdf;
+ u_char *tb;
+ unsigned long flags, tmo;
+
+ /* check for and use a microcode relocation patch */
+ if (cpm->reloc)
+ cpm_reset_iic_params(iip);
+ tb = cpm->temp;
+ tb = (u_char *)(((uint)tb + 15) & ~15);
+ *tb = abyte; /* Device address byte w/rw flag */
+
+ flush_dcache_range((unsigned long) tb, (unsigned long) (tb+1));
+ flush_dcache_range((unsigned long) buf, (unsigned long) (buf+count));
+
+ DEBUGP(1, "cpm_iic_write(abyte=0x%x)\n", abyte);
+
+ /* set up 2 descriptors */
+ tbdf = (cbd_t *)&cp->cp_dpmem[iip->iic_tbase];
+
+ tbdf[0].cbd_bufaddr = __pa(tb);
+ tbdf[0].cbd_datlen = 1;
+ tbdf[0].cbd_sc = BD_SC_READY | BD_IIC_START;
+
+ tbdf[1].cbd_bufaddr = __pa(buf);
+ tbdf[1].cbd_datlen = count;
+ tbdf[1].cbd_sc = BD_SC_READY | BD_SC_INTRPT | BD_SC_LAST | BD_SC_WRAP;
+
+ if (count > 16) {
+ /* Chip bug, set enable here */
+ local_irq_save(flags);
+ i2c->i2c_i2cmr = 0x13; /* Enable some interupts */
+ i2c->i2c_i2cer = 0xff;
+ i2c->i2c_i2mod |= 1; /* Enable */
+ i2c->i2c_i2com |= 0x80; /* Begin transmission */
+
+ /* Wait for IIC transfer */
+ tmo = interruptible_sleep_on_timeout(&iic_wait,1*HZ);
+ local_irq_restore(flags);
+ } else { /* busy wait for small transfers, its faster */
+ i2c->i2c_i2cmr = 0x00; /* Disable I2C interupts */
+ i2c->i2c_i2cer = 0xff;
+ i2c->i2c_i2mod |= 1; /* Enable */
+ i2c->i2c_i2com |= 0x80; /* Begin transmission */
+ tmo = jiffies + 1*HZ;
+ /* Busy wait, with a timeout */
+ while(!(i2c->i2c_i2cer & 0x12 || time_after(jiffies, tmo)));
+ }
+
+ if (signal_pending(current) || !tmo){
+ force_close(cpm);
+ if (!tmo)
+ DEBUGP(1, "IIC write: timeout!\n");
+ return -EIO;
+ }
+
+#if I2C_CHIP_ERRATA
+ /* Chip errata, clear enable. This is not needed on rev D4 CPUs.
+ Disabling I2C too early may cause too short stop condition */
+ udelay(4);
+ i2c->i2c_i2mod &= ~1;
+#endif
+ DEBUGP(1, "tx0 sc %04x, tx1 sc %04x\n", tbdf[0].cbd_sc,
+ tbdf[1].cbd_sc);
+
+ if ((tbdf[0].cbd_sc | tbdf[1].cbd_sc) & BD_SC_NAK) {
+ DEBUGP(1, "IIC write; no ack\n");
+ return 0;
+ }
+
+ if ((tbdf[0].cbd_sc | tbdf[1].cbd_sc) & BD_SC_READY) {
+ DEBUGP(1, "IIC write; complete but tbuf ready\n");
+ return 0;
+ }
+
+ return count;
+}
+
+/* See if an IIC address exists..
+ * addr = 7 bit address, unshifted
+ */
+static int
+cpm_iic_tryaddress(struct i2c_algo_8xx_data *cpm, int addr)
+{
+ volatile iic_t *iip = cpm->iip;
+ volatile i2c8xx_t *i2c = cpm->i2c;
+ volatile cpm8xx_t *cp = cpm->cp;
+ volatile cbd_t *tbdf, *rbdf;
+ u_char *tb;
+ unsigned long flags, len, tmo;
+
+ DEBUGP(2, "cpm_iic_tryaddress(cpm=%p,addr=%d)\n", cpm, addr);
+
+ /* check for and use a microcode relocation patch */
+ if (cpm->reloc)
+ cpm_reset_iic_params(iip);
+
+ if (addr == 0) {
+ DEBUGP(1, "iip %p, dp_addr 0x%x\n", cpm->iip, cpm->dp_addr);
+ DEBUGP(1, "iic_tbase %d, r_tbase %d\n", iip->iic_tbase,
+ r_tbase);
+ }
+
+ tbdf = (cbd_t *)&cp->cp_dpmem[iip->iic_tbase];
+ rbdf = (cbd_t *)&cp->cp_dpmem[iip->iic_rbase];
+
+ tb = cpm->temp;
+ tb = (u_char *)(((uint)tb + 15) & ~15);
+
+ /* do a simple read */
+ tb[0] = (addr << 1) | 1; /* device address (+ read) */
+ len = 2;
+
+ flush_dcache_range((unsigned long) tb, (unsigned long) (tb+1));
+
+ tbdf->cbd_bufaddr = __pa(tb);
+ tbdf->cbd_datlen = len;
+ tbdf->cbd_sc =
+ BD_SC_READY | BD_SC_LAST |
+ BD_SC_WRAP | BD_IIC_START;
+
+ rbdf->cbd_datlen = 0;
+ rbdf->cbd_bufaddr = __pa(tb+2);
+ rbdf->cbd_sc = BD_SC_EMPTY | BD_SC_WRAP | BD_SC_INTRPT;
+
+ local_irq_save(flags);
+ i2c->i2c_i2cmr = 0x13; /* Enable some interupts */
+ i2c->i2c_i2cer = 0xff;
+ i2c->i2c_i2mod |= 1; /* Enable */
+ i2c->i2c_i2com |= 0x80; /* Begin transmission */
+
+ DEBUGP(1, "about to sleep\n");
+
+ /* wait for IIC transfer */
+ tmo = interruptible_sleep_on_timeout(&iic_wait,1*HZ);
+ local_irq_restore(flags);
+
+#ifdef I2C_CHIP_ERRATA
+ /* Chip errata, clear enable. This is not needed on rev D4 CPUs.
+ Disabling I2C too early may cause too short stop condition */
+ udelay(4);
+ i2c->i2c_i2mod &= ~1;
+#endif
+
+ if (signal_pending(current) || !tmo){
+ force_close(cpm);
+ if (!tmo)
+ DEBUGP(1, "IIC tryaddress: timeout!\n");
+ return -EIO;
+ }
+
+ DEBUGP(2, "back from sleep\n");
+
+ if (tbdf->cbd_sc & BD_SC_NAK) {
+ DEBUGP(2, "IIC try; no ack\n");
+ return 0;
+ }
+
+ if (tbdf->cbd_sc & BD_SC_READY)
+ printk(KERN_INFO "IIC try; complete but tbuf ready\n");
+
+ return 1;
+}
+
+static int cpm_xfer(struct i2c_adapter *i2c_adap,
+ struct i2c_msg msgs[],
+ int num)
+{
+ struct i2c_algo_8xx_data *adap = i2c_adap->algo_data;
+ struct i2c_msg *pmsg;
+ int i, ret;
+ u_char addr;
+
+ for (i = 0; i < num; i++) {
+ pmsg = &msgs[i];
+
+ DEBUGP(1, "#%d addr=0x%x flags=0x%x len=%d\n buf=%p\n",
+ i, pmsg->addr, pmsg->flags, pmsg->len, pmsg->buf);
+
+ addr = pmsg->addr << 1;
+ if (pmsg->flags & I2C_M_RD)
+ addr |= 1;
+ if (pmsg->flags & I2C_M_REV_DIR_ADDR)
+ addr ^= 1;
+
+ if (pmsg->flags & I2C_M_RD) {
+ /* read bytes into buffer*/
+ ret = cpm_iic_read(adap, addr, pmsg->buf, pmsg->len);
+ DEBUGP(1, "read %d bytes\n", ret);
+ if (ret < pmsg->len)
+ return (ret < 0)? ret:-EREMOTEIO;
+ } else {
+ /* write bytes from buffer */
+ ret = cpm_iic_write(adap, addr, pmsg->buf, pmsg->len);
+ DEBUGP(1, "wrote %d\n", ret);
+ if (ret < pmsg->len)
+ return (ret < 0)? ret:-EREMOTEIO;
+ }
+ }
+ return num;
+}
+
+static u32 cpm_func(struct i2c_adapter *adap)
+{
+ return I2C_FUNC_SMBUS_EMUL | I2C_FUNC_10BIT_ADDR |
+ I2C_FUNC_PROTOCOL_MANGLING;
+}
+
+static struct i2c_algorithm i2c_algo_8xx = {
+ .name = "MPC8xx CPM algorithm",
+ .id = I2C_ALGO_MPC8XX,
+ .master_xfer = cpm_xfer,
+ .functionality = cpm_func,
+};
+
+/*
+ * registering functions to load algorithms at runtime
+ */
+int i2c_8xx_add_bus(struct i2c_adapter *adap)
+{
+ int i;
+ struct i2c_algo_8xx_data *cpm_adap = adap->algo_data;
+
+ DEBUGP(1, "hw routines for %s registered.\n", adap->name);
+
+ /* register new adapter to i2c module... */
+
+ adap->id |= i2c_algo_8xx.id;
+ adap->algo = &i2c_algo_8xx;
+
+ i2c_add_adapter(adap);
+ cpm_iic_init(cpm_adap);
+
+ /* scan bus */
+ if (cpm_scan) {
+ printk(KERN_INFO "%s: scanning bus %s...\n", module_name,
+ adap->name);
+ for (i = 0; i < 128; i++)
+ if (cpm_iic_tryaddress(cpm_adap, i)) {
+ printk("(%02x)", i << 1);
+ }
+ printk("\n");
+ }
+ return 0;
+}
+
+int i2c_8xx_del_bus(struct i2c_adapter *adap)
+{
+ int res;
+ struct i2c_algo_8xx_data *cpm_adap = adap->algo_data;
+
+ cpm_iic_shutdown(cpm_adap);
+
+ if ((res = i2c_del_adapter(adap)) < 0)
+ return res;
+
+ printk(KERN_INFO "%s: adapter unregistered: %s\n", module_name,
+ adap->name);
+
+ return 0;
+}
+
+module_param(cpm_debug, int, S_IRUGO | S_IWUSR);
+MODULE_PARM_DESC(cpm_debug, "Sets the debug level. (0 = none, 1 = normal, "
+ ">1 = plenty");
+MODULE_AUTHOR("Brad Parker <brad at heeltoe.com>");
+MODULE_DESCRIPTION("I2C-Bus MPC8XX algorithm");
+MODULE_LICENSE("GPL");
+
+EXPORT_SYMBOL(i2c_8xx_add_bus);
+EXPORT_SYMBOL(i2c_8xx_del_bus);
+
Index: 2.6-8xx/drivers/i2c/algos/Makefile
===================================================================
--- 2.6-8xx.orig/drivers/i2c/algos/Makefile 2005-07-28 12:05:11.000000000 -0300
+++ 2.6-8xx/drivers/i2c/algos/Makefile 2005-08-05 16:48:26.000000000 -0300
@@ -8,6 +8,7 @@
obj-$(CONFIG_I2C_ALGOITE) += i2c-algo-ite.o
obj-$(CONFIG_I2C_ALGO_SIBYTE) += i2c-algo-sibyte.o
obj-$(CONFIG_I2C_ALGO_SGI) += i2c-algo-sgi.o
+obj-$(CONFIG_I2C_ALGO8XX) += i2c-algo-8xx.o
ifeq ($(CONFIG_I2C_DEBUG_ALGO),y)
EXTRA_CFLAGS += -DDEBUG
Index: 2.6-8xx/include/linux/i2c-algo-8xx.h
===================================================================
--- /dev/null 1970-01-01 00:00:00.000000000 +0000
+++ 2.6-8xx/include/linux/i2c-algo-8xx.h 2005-08-05 16:57:21.000000000 -0300
@@ -0,0 +1,28 @@
+/* ------------------------------------------------------------------------- */
+/* i2c-algo-8xx.h i2c driver algorithms for MPX8XX CPM */
+/* ------------------------------------------------------------------------- */
+
+/* $Id$ */
+
+#ifndef I2C_ALGO_8XX_H
+#define I2C_ALGO_8XX_H
+
+#include <linux/i2c.h>
+#include <asm/8xx_immap.h>
+#include <asm/commproc.h>
+
+struct i2c_algo_8xx_data {
+ uint dp_addr;
+ int reloc;
+ volatile i2c8xx_t *i2c;
+ volatile iic_t *iip;
+ volatile cpm8xx_t *cp;
+
+ u_char temp[513];
+};
+
+int i2c_8xx_add_bus(struct i2c_adapter *);
+int i2c_8xx_del_bus(struct i2c_adapter *);
+
+#endif /* I2C_ALGO_8XX_H */
+
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