/* * 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);