[PATCH] I2C: Add I2C support for the MPC8260
Heiko Schocher
hs at denx.de
Tue Nov 22 02:55:28 EST 2005
Hello,
the following Patch (against 2.6 kernel.org tree, COMMIT_ID:
f093182d313edde9b1f86dbdaf40ba4da2dbd0e7) adds support for
the I2C on a MPC8260.
---
drivers/i2c/busses/Kconfig | 10 +
drivers/i2c/busses/Makefile | 1
drivers/i2c/busses/i2c-mpc8260.c | 617 ++++++++++++++++++++++++++++++++++++++
include/linux/i2c-algo-8260.h | 26 ++
include/linux/i2c-id.h | 3
5 files changed, 657 insertions(+), 0 deletions(-)
diff --git a/drivers/i2c/busses/Kconfig b/drivers/i2c/busses/Kconfig
index 4010fe9..77f9c69 100644
--- a/drivers/i2c/busses/Kconfig
+++ b/drivers/i2c/busses/Kconfig
@@ -270,6 +270,16 @@ config I2C_MPC
This driver can also be built as a module. If so, the module
will be called i2c-mpc.
+config I2C_MPC8260
+ tristate "MPC 8260"
+ depends on I2C && PPC32
+ help
+ If you say yes to this option, support will be included for the
+ I2C interface on the MPC8260.
+
+ This driver can also be built as a module. If so, the module
+ will be called i2c-m8260.
+
config I2C_NFORCE2
tristate "Nvidia nForce2, nForce3 and nForce4"
depends on I2C && PCI
diff --git a/drivers/i2c/busses/Makefile b/drivers/i2c/busses/Makefile
index f1df00f..b4d8cea 100644
--- a/drivers/i2c/busses/Makefile
+++ b/drivers/i2c/busses/Makefile
@@ -43,6 +43,7 @@ obj-$(CONFIG_I2C_VIAPRO) += i2c-viapro.o
obj-$(CONFIG_I2C_VOODOO3) += i2c-voodoo3.o
obj-$(CONFIG_SCx200_ACB) += scx200_acb.o
obj-$(CONFIG_SCx200_I2C) += scx200_i2c.o
+obj-$(CONFIG_I2C_MPC8260) += i2c-mpc8260.o
ifeq ($(CONFIG_I2C_DEBUG_BUS),y)
EXTRA_CFLAGS += -DDEBUG
diff --git a/drivers/i2c/busses/i2c-mpc8260.c b/drivers/i2c/busses/i2c-mpc8260.c
new file mode 100644
index 0000000..f1bfa51
--- /dev/null
+++ b/drivers/i2c/busses/i2c-mpc8260.c
@@ -0,0 +1,617 @@
+/*
+ * (C) Copyright 2005
+ * Heiko Schocher <hs at denx.de>
+ *
+ * This is a combined i2c adapter and algorithm driver for the
+ * MPC8260 Processor
+ *
+ * Release 0.1
+ *
+ * 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.
+ */
+
+#include <linux/config.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/sched.h>
+#include <linux/init.h>
+#include <linux/pci.h>
+#include <asm/io.h>
+#include <linux/fsl_devices.h>
+#include <linux/i2c.h>
+#include <linux/interrupt.h>
+#include <linux/delay.h>
+#include <asm/immap_cpm2.h>
+#include <asm/mpc8260.h>
+#include <asm/cpm2.h>
+
+#include <linux/i2c-algo-8260.h>
+#include <linux/platform_device.h>
+
+#define CPM_MAX_READ 513
+
+static wait_queue_head_t iic_wait;
+static ushort r_tbase, r_rbase;
+
+int cpm_scan = 0;
+int cpm_debug = 0;
+
+struct mpc_i2c {
+ u32 interrupt;
+ wait_queue_head_t queue;
+ struct i2c_adapter adap;
+ int irq;
+ u32 flags;
+ struct i2c_algo_8260_data *data;
+};
+
+static struct i2c_algo_8260_data pm82x_data;
+
+static void
+mpc8260_iic_init(struct i2c_algo_8260_data *data)
+{
+ volatile cpm_cpm2_t *cp;
+ volatile cpm2_map_t *immap;
+
+ cp = cpmp; /* Get pointer to Communication Processor */
+ immap = (cpm2_map_t *)CPM_MAP_ADDR; /* and to internal registers */
+
+ *(ushort *)(&immap->im_dprambase[PROFF_I2C_BASE]) = PROFF_I2C;
+ data->iip = (iic_t *)&immap->im_dprambase[PROFF_I2C];
+
+ data->i2c = (i2c_cpm2_t *)&(immap->im_i2c);
+ data->cp = cp;
+
+ /* Initialize Port D IIC pins.
+ */
+ immap->im_ioport.iop_ppard |= 0x00030000;
+ immap->im_ioport.iop_pdird &= ~0x00030000;
+ immap->im_ioport.iop_podrd |= 0x00030000;
+ immap->im_ioport.iop_psord |= 0x00030000;
+
+ /* Allocate space for two transmit and two receive buffer
+ * descriptors in the DP ram.
+ */
+ data->dp_addr = cpm_dpalloc(sizeof(cbd_t) * 4, 8);
+
+ /* ptr to i2c area */
+ data->i2c = (i2c_cpm2_t *)&(((cpm2_map_t *)CPM_MAP_ADDR)->im_i2c);
+}
+
+static irqreturn_t mpc8260_i2c_isr(int irq, void *dev_id, struct pt_regs *regs)
+{
+ struct mpc_i2c *mpc_i2c = dev_id;
+ struct i2c_algo_8260_data *cpm_adap = mpc_i2c->data;
+ volatile i2c_cpm2_t *i2c = cpm_adap->i2c;
+
+ if (cpm_debug > 1)
+ printk(KERN_DEBUG "cpm_iic_interrupt(dev_id=%p)\n", dev_id);
+
+ /* Clear interrupt.
+ */
+ i2c->i2c_i2cer = 0xff;
+
+ /* Get 'me going again.
+ */
+ wake_up_interruptible(&iic_wait);
+ return IRQ_HANDLED;
+}
+
+
+static void
+cpm_iic_init(struct i2c_algo_8260_data *cpm_adap)
+{
+ volatile iic_t *iip = cpm_adap->iip;
+ volatile i2c_cpm2_t *i2c = cpm_adap->i2c;
+
+ if (cpm_debug) printk(KERN_DEBUG "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 = CPMFCR_GBL | CPMFCR_EB;
+ iip->iic_rfcr = CPMFCR_GBL | CPMFCR_EB;
+
+ /* Set maximum receive size.
+ */
+ iip->iic_mrblr = CPM_MAX_READ;
+
+ /* Initialize Tx/Rx parameters.
+ */
+ {
+ volatile cpm_cpm2_t *cp = cpm_adap->cp;
+ cp->cp_cpcr =
+ mk_cr_cmd(CPM_CR_I2C_PAGE, CPM_CR_I2C_SBLOCK, 0x00, CPM_CR_INIT_TRX) | CPM_CR_FLG;
+ while (cp->cp_cpcr & CPM_CR_FLG);
+ }
+
+ /* Select an arbitrary address. Just make sure it is unique.
+ */
+ i2c->i2c_i2add = 0x34;
+
+ /* Divider is 2 * ( 15 + 3 )
+ */
+ i2c->i2c_i2brg = 0x0f;
+
+ /* Pre-divider is BRGCLK/4
+ */
+ i2c->i2c_i2mod = 0x06;
+
+ /* Disable interrupts.
+ */
+ i2c->i2c_i2cmr = 0;
+ i2c->i2c_i2cer = 0xff;
+
+ init_waitqueue_head(&iic_wait);
+}
+
+
+#if 0
+static int
+cpm_iic_shutdown(struct i2c_algo_8260_data *cpm_adap)
+{
+ volatile i2c_cpm2_t *i2c = cpm_adap->i2c;
+
+ /* Shut down IIC.
+ */
+ i2c->i2c_i2mod = 0;
+ i2c->i2c_i2cmr = 0;
+ i2c->i2c_i2cer = 0xff;
+
+ return(0);
+}
+#endif
+
+static void
+cpm_reset_iic_params(volatile iic_t *iip)
+{
+ iip->iic_tbase = r_tbase;
+ iip->iic_rbase = r_rbase;
+
+ iip->iic_tfcr = CPMFCR_GBL | CPMFCR_EB;
+ iip->iic_rfcr = CPMFCR_GBL | CPMFCR_EB;
+
+ iip->iic_mrblr = CPM_MAX_READ;
+
+ 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;
+}
+
+#define BD_SC_NAK ((ushort)0x0004) /* NAK - did not respond */
+#define CPM_CR_CLOSE_RXBD ((ushort)0x0007)
+
+static void force_close(struct i2c_algo_8260_data *cpm)
+{
+#if 0
+ volatile cpm_cpm2_t *cp = cpm->cp;
+
+ if (cpm_debug) printk(KERN_DEBUG "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);
+#endif
+}
+
+
+/* Read from IIC...
+ * abyte = address byte, with r/w flag already set
+ */
+static int
+cpm_iic_read(struct i2c_algo_8260_data *cpm, u_char abyte, char *buf, int count)
+{
+ volatile cpm2_map_t *immap = (cpm2_map_t *)CPM_MAP_ADDR;
+ volatile iic_t *iip = cpm->iip;
+ volatile i2c_cpm2_t *i2c = cpm->i2c;
+ volatile cbd_t *tbdf, *rbdf;
+ u_char *tb;
+ unsigned long flags;
+
+ if (count >= CPM_MAX_READ)
+ return -EINVAL;
+
+ tbdf = (cbd_t *)&immap->im_dprambase[iip->iic_tbase];
+ rbdf = (cbd_t *)&immap->im_dprambase[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).
+ */
+ if (/*cpm->reloc*/0) {
+ cpm_reset_iic_params(iip);
+ }
+ tb = cpm->temp;
+ tb = (u_char *)(((uint)tb + 15) & ~15);
+ tb[0] = abyte; /* Device address byte w/rw flag */
+
+ dma_cache_wback_inv (tb, 1);
+
+ if (cpm_debug) printk(KERN_DEBUG "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_INTRPT | BD_SC_LAST |
+ BD_SC_WRAP | BD_IIC_START;
+
+ rbdf->cbd_datlen = 0;
+ rbdf->cbd_bufaddr = __pa(buf);
+ rbdf->cbd_sc = BD_SC_EMPTY | BD_SC_WRAP;
+
+ if (count > 0 && count < CPM_MAX_READ)
+ iip->iic_mrblr = count; /* prevent excessive read */
+
+ dma_cache_inv (buf, count);
+
+ /* 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 = 0x81; /* Start master */
+
+ /* Wait for IIC transfer */
+ interruptible_sleep_on(&iic_wait);
+ local_irq_restore(flags);
+ if (signal_pending(current))
+ return -EIO;
+
+ if (cpm_debug) {
+ printk(KERN_DEBUG "tx sc %04x, rx sc %04x\n",
+ tbdf->cbd_sc, rbdf->cbd_sc);
+ }
+
+ if (tbdf->cbd_sc & BD_SC_NAK) {
+ printk(KERN_INFO "IIC read; no ack\n");
+ return 0;
+ }
+
+ if (rbdf->cbd_sc & BD_SC_EMPTY) {
+ printk(KERN_INFO "IIC read; complete but rbuf empty\n");
+ force_close(cpm);
+ printk(KERN_INFO "tx sc %04x, rx sc %04x\n",
+ tbdf->cbd_sc, rbdf->cbd_sc);
+ }
+
+ if (cpm_debug) printk(KERN_DEBUG "read %d bytes\n", rbdf->cbd_datlen);
+
+ if (rbdf->cbd_datlen < count) {
+ printk(KERN_INFO "IIC read; short, wanted %d got %d\n",
+ count, rbdf->cbd_datlen);
+ return 0;
+ }
+ if (cpm_debug) {
+ int u;
+ for (u = 0; u < count; u++) {
+ printk(KERN_DEBUG "buf[%d] = 0x%x\n", u, buf[u]);
+ }
+ }
+
+
+ return count;
+}
+
+/* Write to IIC...
+ * addr = address byte, with r/w flag already set
+ */
+static int
+cpm_iic_write(struct i2c_algo_8260_data *cpm, u_char abyte, char *buf,int count)
+{
+ volatile cpm2_map_t *immap = (cpm2_map_t *)CPM_MAP_ADDR;
+ volatile iic_t *iip = cpm->iip;
+ volatile i2c_cpm2_t *i2c = cpm->i2c;
+ volatile cbd_t *tbdf;
+ u_char *tb;
+ unsigned long flags;
+
+ tb = cpm->temp;
+ tb = (u_char *)(((uint)tb + 15) & ~15);
+ *tb = abyte; /* Device address byte w/rw flag */
+
+ dma_cache_wback_inv (tb, 1);
+ dma_cache_wback_inv (buf, count);
+
+ if (cpm_debug) printk(KERN_DEBUG "cpm_iic_write(abyte=0x%x)\n", abyte);
+ if (cpm_debug) printk(KERN_DEBUG "buf[0] = 0x%x, buf[1] = 0x%x\n", buf[0], buf[1]);
+
+ /* set up 2 descriptors */
+ tbdf = (cbd_t *)&immap->im_dprambase[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;
+
+ /* 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 = 0x81; /* Start master */
+
+ /* Wait for IIC transfer */
+ interruptible_sleep_on(&iic_wait);
+ local_irq_restore(flags);
+ if (signal_pending(current))
+ return -EIO;
+
+ if (cpm_debug) {
+ printk(KERN_DEBUG "tx0 sc %04x, tx1 sc %04x\n",
+ tbdf[0].cbd_sc, tbdf[1].cbd_sc);
+ }
+
+ if (tbdf->cbd_sc & BD_SC_NAK) {
+ printk(KERN_INFO "IIC write; no ack\n");
+ return 0;
+ }
+
+ if (tbdf->cbd_sc & BD_SC_READY) {
+ printk(KERN_INFO "IIC write; complete but tbuf ready\n");
+ return 0;
+ }
+
+ return count;
+}
+
+#if 0
+/* See if an IIC address exists..
+ * addr = 7 bit address, unshifted
+ */
+static int
+cpm_iic_tryaddress(struct i2c_algo_8260_data *cpm, int addr)
+{
+ volatile cpm2_map_t *immap = (cpm2_map_t *)CPM_MAP_ADDR;
+ volatile iic_t *iip = cpm->iip;
+ volatile i2c_cpm2_t *i2c = cpm->i2c;
+ volatile cbd_t *tbdf, *rbdf;
+ u_char *tb;
+ unsigned long flags, len;
+
+ if (cpm_debug > 1)
+ printk(KERN_DEBUG "cpm_iic_tryaddress(cpm=%p,addr=%d)\n", cpm, addr);
+
+ if (cpm_debug && addr == 0) {
+ printk(KERN_DEBUG "iip %p, dp_addr 0x%x\n", cpm->iip, cpm->dp_addr);
+ printk(KERN_DEBUG "iic_tbase %d, r_tbase %d\n", iip->iic_tbase, r_tbase);
+ }
+
+ tbdf = (cbd_t *)&immap->im_dprambase[iip->iic_tbase];
+ rbdf = (cbd_t *)&immap->im_dprambase[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;
+
+ dma_cache_wback_inv (tb, 1);
+
+ tbdf->cbd_bufaddr = __pa(tb);
+ tbdf->cbd_datlen = len;
+ tbdf->cbd_sc =
+ BD_SC_READY | BD_SC_INTRPT | 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;
+
+ local_irq_save(flags);
+ i2c->i2c_i2cmr = 0x13; /* Enable some interupts */
+ i2c->i2c_i2cer = 0xff;
+ i2c->i2c_i2mod |= 1; /* Enable */
+ i2c->i2c_i2com = 0x81; /* Start master */
+
+ if (cpm_debug > 1) printk(KERN_DEBUG "about to sleep\n");
+
+ /* wait for IIC transfer */
+ interruptible_sleep_on(&iic_wait);
+ local_irq_restore(flags);
+ if (signal_pending(current))
+ return -EIO;
+
+ if (cpm_debug > 1) printk(KERN_DEBUG "back from sleep\n");
+
+ if (tbdf->cbd_sc & BD_SC_NAK) {
+ if (cpm_debug > 1) printk(KERN_DEBUG "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;
+}
+#endif
+
+static int mpc8260_xfer(struct i2c_adapter *adap, struct i2c_msg *msgs, int num)
+{
+ struct i2c_msg *pmsg;
+ int i;
+ int ret = 0;
+ struct mpc_i2c *mpc_i2c = i2c_get_adapdata(adap);
+ struct i2c_algo_8260_data *data = mpc_i2c->data;
+ u_char addr;
+
+ for (i = 0; i < num; i++) {
+ pmsg = &msgs[i];
+
+ if (cpm_debug)
+ printk(KERN_DEBUG "i2c-algo-8260.o: "
+ "#%d addr=0x%x flags=0x%x len=%d\n",
+ i, pmsg->addr, pmsg->flags, pmsg->len);
+
+ 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_NOSTART)) {
+ }
+ if (pmsg->flags & I2C_M_RD ) {
+ /* read bytes into buffer*/
+ ret = cpm_iic_read(data, addr, pmsg->buf, pmsg->len);
+ if (cpm_debug)
+ printk(KERN_DEBUG "i2c-algo-8260.o: read %d bytes\n", ret);
+ if (ret < pmsg->len ) {
+ return (ret<0)? ret : -EREMOTEIO;
+ }
+ } else {
+ /* write bytes from buffer */
+ ret = cpm_iic_write(data, addr, pmsg->buf, pmsg->len);
+ if (cpm_debug)
+ printk(KERN_DEBUG "i2c-algo-8260.o: wrote %d\n", ret);
+ if (ret < pmsg->len ) {
+ return (ret<0) ? ret : -EREMOTEIO;
+ }
+ }
+ }
+ return (ret < 0) ? ret : num;
+}
+
+static u32 mpc8260_functionality(struct i2c_adapter *adap)
+{
+ return I2C_FUNC_SMBUS_EMUL | I2C_FUNC_10BIT_ADDR |
+ I2C_FUNC_PROTOCOL_MANGLING;
+}
+
+static struct i2c_algorithm mpc8260_algo = {
+ .master_xfer = mpc8260_xfer,
+ .functionality = mpc8260_functionality,
+};
+
+static struct i2c_adapter mpc8260_ops = {
+ .owner = THIS_MODULE,
+ .name = "MPC 8260 adapter",
+ .id = I2C_HW_MPC8260,
+ .algo = &mpc8260_algo,
+ .class = I2C_CLASS_HWMON,
+ .timeout = 1,
+ .retries = 1
+};
+
+static int fsl_i2c_probe(struct device *device)
+{
+ int result = 0;
+ struct mpc_i2c *i2c;
+ struct platform_device *pdev = to_platform_device(device);
+ struct fsl_i2c_platform_data *pdata;
+
+ pdata = (struct fsl_i2c_platform_data *) pdev->dev.platform_data;
+
+ if (!(i2c = kmalloc(sizeof(*i2c), GFP_KERNEL))) {
+ return -ENOMEM;
+ }
+ memset(i2c, 0, sizeof(*i2c));
+
+ i2c->data = &pm82x_data;
+ /* CPM Plattform initialisation */
+ mpc8260_iic_init (i2c->data);
+ /* CPM init */
+ cpm_iic_init (i2c->data);
+ i2c->irq = platform_get_irq(pdev, 0);
+
+ if (i2c->irq != 0) {
+ if ((result = request_irq(i2c->irq, mpc8260_i2c_isr,
+ SA_SHIRQ, "i2c-mpc", i2c)) < 0) {
+ printk(KERN_ERR
+ "i2c-mpc - failed to attach interrupt\n");
+ goto fail_irq;
+ }
+ }
+ dev_set_drvdata(device, i2c);
+
+ i2c->adap = mpc8260_ops;
+ i2c_set_adapdata(&i2c->adap, i2c);
+ i2c->adap.dev.parent = &pdev->dev;
+ if ((result = i2c_add_adapter(&i2c->adap)) < 0) {
+ printk(KERN_ERR "i2c-mpc - failed to add adapter\n");
+ goto fail_add;
+ }
+
+ return result;
+
+ fail_add:
+ if (i2c->irq != 0)
+ free_irq(i2c->irq, NULL);
+ fail_irq:
+ kfree(i2c);
+ return result;
+};
+
+static int fsl_i2c_remove(struct device *device)
+{
+ struct mpc_i2c *i2c = dev_get_drvdata(device);
+
+ /* hier noich irgendwo das dpalloc wieder freigeben */
+ cpm_dpfree (i2c->data->dp_addr);
+
+ i2c_del_adapter(&i2c->adap);
+ dev_set_drvdata(device, NULL);
+
+ if (i2c->irq != 0)
+ free_irq(i2c->irq, i2c);
+
+ kfree(i2c);
+ return 0;
+};
+
+/* Structure for a device driver */
+static struct device_driver fsl_i2c_driver = {
+ .name = "fsl-cpm-i2c",
+ .bus = &platform_bus_type,
+ .probe = fsl_i2c_probe,
+ .remove = fsl_i2c_remove,
+};
+
+static int __init fsl_i2c_init(void)
+{
+ return driver_register(&fsl_i2c_driver);
+}
+
+static void __exit fsl_i2c_exit(void)
+{
+ driver_unregister(&fsl_i2c_driver);
+}
+
+module_init(fsl_i2c_init);
+module_exit(fsl_i2c_exit);
+
+MODULE_AUTHOR("Heiko Schocher <hs at denx.de>");
+MODULE_DESCRIPTION
+ ("I2C-Bus adapter for MPC8260 processors");
+MODULE_LICENSE("GPL");
diff --git a/include/linux/i2c-algo-8260.h b/include/linux/i2c-algo-8260.h
new file mode 100644
index 0000000..73b3e33
--- /dev/null
+++ b/include/linux/i2c-algo-8260.h
@@ -0,0 +1,26 @@
+/* ------------------------------------------------------------------------- */
+/* i2c-algo-8260.h i2c driver algorithms for MPX8260 CPM */
+/* ------------------------------------------------------------------------- */
+
+/* $Id$ */
+
+#ifndef I2C_ALGO_8260_H
+#define I2C_ALGO_8260_H 1
+
+#include <linux/i2c.h>
+
+struct i2c_algo_8260_data {
+ uint dp_addr;
+ int reloc;
+ volatile i2c_cpm2_t *i2c;
+ volatile iic_t *iip;
+ volatile cpm_cpm2_t *cp;
+
+ int (*setisr) (int irq,
+ void (*func)(int, void (*)(void *), void *),
+ void *data);
+
+ u_char temp[513];
+};
+
+#endif /* I2C_ALGO_8260_H */
diff --git a/include/linux/i2c-id.h b/include/linux/i2c-id.h
index 1543daa..35b0a57 100644
--- a/include/linux/i2c-id.h
+++ b/include/linux/i2c-id.h
@@ -223,6 +223,9 @@
/* --- PowerPC on-chip adapters */
#define I2C_HW_OCP 0x120000 /* IBM on-chip I2C adapter */
+/* --- MPC8260 PowerPC adapters */
+#define I2C_HW_MPC8260 0x100002 /* MPC8260 I2C adapter */
+
/* --- Broadcom SiByte adapters */
#define I2C_HW_SIBYTE 0x150000
!-------------------------------------------------------------flip-
Signed-off-by: Heiko Schocher <hs at denx.de>
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