diff options
Diffstat (limited to 'ANDROID_3.4.5/drivers/i2c/busses/i2c-sibyte.c')
| -rw-r--r-- | ANDROID_3.4.5/drivers/i2c/busses/i2c-sibyte.c | 198 |
1 files changed, 0 insertions, 198 deletions
diff --git a/ANDROID_3.4.5/drivers/i2c/busses/i2c-sibyte.c b/ANDROID_3.4.5/drivers/i2c/busses/i2c-sibyte.c deleted file mode 100644 index 0fe505d7..00000000 --- a/ANDROID_3.4.5/drivers/i2c/busses/i2c-sibyte.c +++ /dev/null @@ -1,198 +0,0 @@ -/* - * Copyright (C) 2004 Steven J. Hill - * Copyright (C) 2001,2002,2003 Broadcom Corporation - * Copyright (C) 1995-2000 Simon G. Vogl - * - * This program is free software; you can redistribute it and/or - * modify it under the terms of the GNU General Public License - * as published by the Free Software Foundation; either version 2 - * of the License, or (at your option) any later version. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. - */ - -#include <linux/kernel.h> -#include <linux/module.h> -#include <linux/init.h> -#include <linux/i2c.h> -#include <linux/io.h> -#include <asm/sibyte/sb1250_regs.h> -#include <asm/sibyte/sb1250_smbus.h> - - -struct i2c_algo_sibyte_data { - void *data; /* private data */ - int bus; /* which bus */ - void *reg_base; /* CSR base */ -}; - -/* ----- global defines ----------------------------------------------- */ -#define SMB_CSR(a,r) ((long)(a->reg_base + r)) - - -static int smbus_xfer(struct i2c_adapter *i2c_adap, u16 addr, - unsigned short flags, char read_write, - u8 command, int size, union i2c_smbus_data * data) -{ - struct i2c_algo_sibyte_data *adap = i2c_adap->algo_data; - int data_bytes = 0; - int error; - - while (csr_in32(SMB_CSR(adap, R_SMB_STATUS)) & M_SMB_BUSY) - ; - - switch (size) { - case I2C_SMBUS_QUICK: - csr_out32((V_SMB_ADDR(addr) | - (read_write == I2C_SMBUS_READ ? M_SMB_QDATA : 0) | - V_SMB_TT_QUICKCMD), SMB_CSR(adap, R_SMB_START)); - break; - case I2C_SMBUS_BYTE: - if (read_write == I2C_SMBUS_READ) { - csr_out32((V_SMB_ADDR(addr) | V_SMB_TT_RD1BYTE), - SMB_CSR(adap, R_SMB_START)); - data_bytes = 1; - } else { - csr_out32(V_SMB_CMD(command), SMB_CSR(adap, R_SMB_CMD)); - csr_out32((V_SMB_ADDR(addr) | V_SMB_TT_WR1BYTE), - SMB_CSR(adap, R_SMB_START)); - } - break; - case I2C_SMBUS_BYTE_DATA: - csr_out32(V_SMB_CMD(command), SMB_CSR(adap, R_SMB_CMD)); - if (read_write == I2C_SMBUS_READ) { - csr_out32((V_SMB_ADDR(addr) | V_SMB_TT_CMD_RD1BYTE), - SMB_CSR(adap, R_SMB_START)); - data_bytes = 1; - } else { - csr_out32(V_SMB_LB(data->byte), - SMB_CSR(adap, R_SMB_DATA)); - csr_out32((V_SMB_ADDR(addr) | V_SMB_TT_WR2BYTE), - SMB_CSR(adap, R_SMB_START)); - } - break; - case I2C_SMBUS_WORD_DATA: - csr_out32(V_SMB_CMD(command), SMB_CSR(adap, R_SMB_CMD)); - if (read_write == I2C_SMBUS_READ) { - csr_out32((V_SMB_ADDR(addr) | V_SMB_TT_CMD_RD2BYTE), - SMB_CSR(adap, R_SMB_START)); - data_bytes = 2; - } else { - csr_out32(V_SMB_LB(data->word & 0xff), - SMB_CSR(adap, R_SMB_DATA)); - csr_out32(V_SMB_MB(data->word >> 8), - SMB_CSR(adap, R_SMB_DATA)); - csr_out32((V_SMB_ADDR(addr) | V_SMB_TT_WR2BYTE), - SMB_CSR(adap, R_SMB_START)); - } - break; - default: - return -EOPNOTSUPP; - } - - while (csr_in32(SMB_CSR(adap, R_SMB_STATUS)) & M_SMB_BUSY) - ; - - error = csr_in32(SMB_CSR(adap, R_SMB_STATUS)); - if (error & M_SMB_ERROR) { - /* Clear error bit by writing a 1 */ - csr_out32(M_SMB_ERROR, SMB_CSR(adap, R_SMB_STATUS)); - return (error & M_SMB_ERROR_TYPE) ? -EIO : -ENXIO; - } - - if (data_bytes == 1) - data->byte = csr_in32(SMB_CSR(adap, R_SMB_DATA)) & 0xff; - if (data_bytes == 2) - data->word = csr_in32(SMB_CSR(adap, R_SMB_DATA)) & 0xffff; - - return 0; -} - -static u32 bit_func(struct i2c_adapter *adap) -{ - return (I2C_FUNC_SMBUS_QUICK | I2C_FUNC_SMBUS_BYTE | - I2C_FUNC_SMBUS_BYTE_DATA | I2C_FUNC_SMBUS_WORD_DATA); -} - - -/* -----exported algorithm data: ------------------------------------- */ - -static const struct i2c_algorithm i2c_sibyte_algo = { - .smbus_xfer = smbus_xfer, - .functionality = bit_func, -}; - -/* - * registering functions to load algorithms at runtime - */ -static int __init i2c_sibyte_add_bus(struct i2c_adapter *i2c_adap, int speed) -{ - struct i2c_algo_sibyte_data *adap = i2c_adap->algo_data; - - /* Register new adapter to i2c module... */ - i2c_adap->algo = &i2c_sibyte_algo; - - /* Set the requested frequency. */ - csr_out32(speed, SMB_CSR(adap,R_SMB_FREQ)); - csr_out32(0, SMB_CSR(adap,R_SMB_CONTROL)); - - return i2c_add_numbered_adapter(i2c_adap); -} - - -static struct i2c_algo_sibyte_data sibyte_board_data[2] = { - { NULL, 0, (void *) (CKSEG1+A_SMB_BASE(0)) }, - { NULL, 1, (void *) (CKSEG1+A_SMB_BASE(1)) } -}; - -static struct i2c_adapter sibyte_board_adapter[2] = { - { - .owner = THIS_MODULE, - .class = I2C_CLASS_HWMON | I2C_CLASS_SPD, - .algo = NULL, - .algo_data = &sibyte_board_data[0], - .nr = 0, - .name = "SiByte SMBus 0", - }, - { - .owner = THIS_MODULE, - .class = I2C_CLASS_HWMON | I2C_CLASS_SPD, - .algo = NULL, - .algo_data = &sibyte_board_data[1], - .nr = 1, - .name = "SiByte SMBus 1", - }, -}; - -static int __init i2c_sibyte_init(void) -{ - pr_info("i2c-sibyte: i2c SMBus adapter module for SiByte board\n"); - if (i2c_sibyte_add_bus(&sibyte_board_adapter[0], K_SMB_FREQ_100KHZ) < 0) - return -ENODEV; - if (i2c_sibyte_add_bus(&sibyte_board_adapter[1], - K_SMB_FREQ_400KHZ) < 0) { - i2c_del_adapter(&sibyte_board_adapter[0]); - return -ENODEV; - } - return 0; -} - -static void __exit i2c_sibyte_exit(void) -{ - i2c_del_adapter(&sibyte_board_adapter[0]); - i2c_del_adapter(&sibyte_board_adapter[1]); -} - -module_init(i2c_sibyte_init); -module_exit(i2c_sibyte_exit); - -MODULE_AUTHOR("Kip Walker (Broadcom Corp.), Steven J. Hill <sjhill@realitydiluted.com>"); -MODULE_DESCRIPTION("SMBus adapter routines for SiByte boards"); -MODULE_LICENSE("GPL"); |