1 files changed, 102 insertions, 0 deletions
diff --git a/drivers/i2c/busses/i2c-rpx.c b/drivers/i2c/busses/i2c-rpx.c
new file mode 100644
index 00000000000..9497b1b6852
--- /dev/null
+++ b/drivers/i2c/busses/i2c-rpx.c
@@ -0,0 +1,102 @@
+/*
+ * Embedded Planet RPX Lite MPC8xx CPM I2C interface.
+ * Copyright (c) 1999 Dan Malek (dmalek@jlc.net).
+ *
+ * moved into proper i2c interface;
+ * Brad Parker (brad@heeltoe.com)
+ *
+ * RPX lite specific parts of the i2c interface
+ * Update:  There actually isn't anything RPXLite-specific about this module.
+ * This should work for most any 8xx board.  The console messages have been 
+ * changed to eliminate RPXLite references.
+ */
+
+#include <linux/config.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/stddef.h>
+#include <linux/i2c.h>
+#include <linux/i2c-algo-8xx.h>
+#include <asm/mpc8xx.h>
+#include <asm/commproc.h>
+
+
+static void
+rpx_iic_init(struct i2c_algo_8xx_data *data)
+{
+	volatile cpm8xx_t *cp;
+	volatile immap_t *immap;
+
+	cp = cpmp;	/* Get pointer to Communication Processor */
+	immap = (immap_t *)IMAP_ADDR;	/* and to internal registers */
+
+	data->iip = (iic_t *)&cp->cp_dparam[PROFF_IIC];
+
+	/* Check for and use a microcode relocation patch.
+	*/
+	if ((data->reloc = data->iip->iic_rpbase))
+		data->iip = (iic_t *)&cp->cp_dpmem[data->iip->iic_rpbase];
+		
+	data->i2c = (i2c8xx_t *)&(immap->im_i2c);
+	data->cp = cp;
+
+	/* Initialize Port B IIC pins.
+	*/
+	cp->cp_pbpar |= 0x00000030;
+	cp->cp_pbdir |= 0x00000030;
+	cp->cp_pbodr |= 0x00000030;
+
+	/* 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 = (i2c8xx_t *)&(((immap_t *)IMAP_ADDR)->im_i2c);
+}
+
+static int rpx_install_isr(int irq, void (*func)(void *, void *), void *data)
+{
+	/* install interrupt handler */
+	cpm_install_handler(irq, (void (*)(void *, struct pt_regs *)) func, data);
+
+	return 0;
+}
+
+static struct i2c_algo_8xx_data rpx_data = {
+	.setisr = rpx_install_isr
+};
+
+static struct i2c_adapter rpx_ops = {
+	.owner		= THIS_MODULE,
+	.name		= "m8xx",
+	.id		= I2C_HW_MPC8XX_EPON,
+	.algo_data	= &rpx_data,
+};
+
+int __init i2c_rpx_init(void)
+{
+	printk(KERN_INFO "i2c-rpx: i2c MPC8xx driver\n");
+
+	/* reset hardware to sane state */
+	rpx_iic_init(&rpx_data);
+
+	if (i2c_8xx_add_bus(&rpx_ops) < 0) {
+		printk(KERN_ERR "i2c-rpx: Unable to register with I2C\n");
+		return -ENODEV;
+	}
+
+	return 0;
+}
+
+void __exit i2c_rpx_exit(void)
+{
+	i2c_8xx_del_bus(&rpx_ops);
+}
+
+MODULE_AUTHOR("Dan Malek <dmalek@jlc.net>");
+MODULE_DESCRIPTION("I2C-Bus adapter routines for MPC8xx boards");
+
+module_init(i2c_rpx_init);
+module_exit(i2c_rpx_exit);