projects / linux-2.6-block.git / blame
| Commit | Line | Data |
|---|---|---|
| 1da177e4 LT |
1 | /* |
| 2 | * Embedded Planet RPX Lite MPC8xx CPM I2C interface. | |
| 3 | * Copyright (c) 1999 Dan Malek (dmalek@jlc.net). | |
| 4 | * | |
| 5 | * moved into proper i2c interface; | |
| 6 | * Brad Parker (brad@heeltoe.com) | |
| 7 | * | |
| 8 | * RPX lite specific parts of the i2c interface | |
| 9 | * Update: There actually isn't anything RPXLite-specific about this module. | |
| 10 | * This should work for most any 8xx board. The console messages have been | |
| 11 | * changed to eliminate RPXLite references. | |
| 12 | */ | |
| 13 | ||
| 1da177e4 LT |
14 | #include <linux/kernel.h> |
| 15 | #include <linux/module.h> | |
| 16 | #include <linux/init.h> | |
| 17 | #include <linux/stddef.h> | |
| 18 | #include <linux/i2c.h> | |
| 19 | #include <linux/i2c-algo-8xx.h> | |
| 20 | #include <asm/mpc8xx.h> | |
| 21 | #include <asm/commproc.h> | |
| 22 | ||
| 23 | ||
| 24 | static void | |
| 25 | rpx_iic_init(struct i2c_algo_8xx_data *data) | |
| 26 | { | |
| 27 | volatile cpm8xx_t *cp; | |
| 28 | volatile immap_t *immap; | |
| 29 | ||
| 30 | cp = cpmp; /* Get pointer to Communication Processor */ | |
| 31 | immap = (immap_t *)IMAP_ADDR; /* and to internal registers */ | |
| 32 | ||
| 33 | data->iip = (iic_t *)&cp->cp_dparam[PROFF_IIC]; | |
| 34 | ||
| 35 | /* Check for and use a microcode relocation patch. | |
| 36 | */ | |
| 37 | if ((data->reloc = data->iip->iic_rpbase)) | |
| 38 | data->iip = (iic_t *)&cp->cp_dpmem[data->iip->iic_rpbase]; | |
| 39 | ||
| 40 | data->i2c = (i2c8xx_t *)&(immap->im_i2c); | |
| 41 | data->cp = cp; | |
| 42 | ||
| 43 | /* Initialize Port B IIC pins. | |
| 44 | */ | |
| 45 | cp->cp_pbpar |= 0x00000030; | |
| 46 | cp->cp_pbdir |= 0x00000030; | |
| 47 | cp->cp_pbodr |= 0x00000030; | |
| 48 | ||
| 49 | /* Allocate space for two transmit and two receive buffer | |
| 50 | * descriptors in the DP ram. | |
| 51 | */ | |
| 52 | data->dp_addr = cpm_dpalloc(sizeof(cbd_t) * 4, 8); | |
| 53 | ||
| 54 | /* ptr to i2c area */ | |
| 55 | data->i2c = (i2c8xx_t *)&(((immap_t *)IMAP_ADDR)->im_i2c); | |
| 56 | } | |
| 57 | ||
| 7d12e780 | 58 | static int rpx_install_isr(int irq, void (*func)(void *), void *data) |
| 1da177e4 LT |
59 | { |
| 60 | /* install interrupt handler */ | |
| 7d12e780 | 61 | cpm_install_handler(irq, func, data); |
| 1da177e4 LT |
62 | |
| 63 | return 0; | |
| 64 | } | |
| 65 | ||
| 66 | static struct i2c_algo_8xx_data rpx_data = { | |
| 67 | .setisr = rpx_install_isr | |
| 68 | }; | |
| 69 | ||
| 70 | static struct i2c_adapter rpx_ops = { | |
| 71 | .owner = THIS_MODULE, | |
| 72 | .name = "m8xx", | |
| 73 | .id = I2C_HW_MPC8XX_EPON, | |
| 74 | .algo_data = &rpx_data, | |
| 75 | }; | |
| 76 | ||
| 77 | int __init i2c_rpx_init(void) | |
| 78 | { | |
| 79 | printk(KERN_INFO "i2c-rpx: i2c MPC8xx driver\n"); | |
| 80 | ||
| 81 | /* reset hardware to sane state */ | |
| 82 | rpx_iic_init(&rpx_data); | |
| 83 | ||
| 84 | if (i2c_8xx_add_bus(&rpx_ops) < 0) { | |
| 85 | printk(KERN_ERR "i2c-rpx: Unable to register with I2C\n"); | |
| 86 | return -ENODEV; | |
| 87 | } | |
| 88 | ||
| 89 | return 0; | |
| 90 | } | |
| 91 | ||
| 92 | void __exit i2c_rpx_exit(void) | |
| 93 | { | |
| 94 | i2c_8xx_del_bus(&rpx_ops); | |
| 95 | } | |
| 96 | ||
| 97 | MODULE_AUTHOR("Dan Malek <dmalek@jlc.net>"); | |
| 98 | MODULE_DESCRIPTION("I2C-Bus adapter routines for MPC8xx boards"); | |
| 99 | ||
| 100 | module_init(i2c_rpx_init); | |
| 101 | module_exit(i2c_rpx_exit); |