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/*
* 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/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);
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