summaryrefslogtreecommitdiff
path: root/drivers/i2c/algos/i2c-algo-sibyte.c
diff options
context:
space:
mode:
Diffstat (limited to 'drivers/i2c/algos/i2c-algo-sibyte.c')
-rw-r--r--drivers/i2c/algos/i2c-algo-sibyte.c215
1 files changed, 0 insertions, 215 deletions
diff --git a/drivers/i2c/algos/i2c-algo-sibyte.c b/drivers/i2c/algos/i2c-algo-sibyte.c
deleted file mode 100644
index 32d41c6fac0f..000000000000
--- a/drivers/i2c/algos/i2c-algo-sibyte.c
+++ /dev/null
@@ -1,215 +0,0 @@
-/* ------------------------------------------------------------------------- */
-/* i2c-algo-sibyte.c i2c driver algorithms for bit-shift adapters */
-/* ------------------------------------------------------------------------- */
-/* 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., 675 Mass Ave, Cambridge, MA 02139, USA. */
-/* ------------------------------------------------------------------------- */
-
-/* With some changes from Kyösti Mälkki <kmalkki@cc.hut.fi> and even
- Frodo Looijaard <frodol@dds.nl>. */
-
-/* Ported for SiByte SOCs by Broadcom Corporation. */
-
-#include <linux/kernel.h>
-#include <linux/module.h>
-#include <linux/init.h>
-
-#include <asm/io.h>
-#include <asm/sibyte/sb1250_regs.h>
-#include <asm/sibyte/sb1250_smbus.h>
-
-#include <linux/i2c.h>
-#include <linux/i2c-algo-sibyte.h>
-
-/* ----- global defines ----------------------------------------------- */
-#define SMB_CSR(a,r) ((long)(a->reg_base + r))
-
-/* ----- global variables --------------------------------------------- */
-
-/* module parameters:
- */
-static int bit_scan; /* have a look at what's hanging 'round */
-
-
-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 -1; /* XXXKW better error code? */
- }
-
- 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 -1; /* XXXKW better error code? */
- }
-
- 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 int algo_control(struct i2c_adapter *adapter,
- unsigned int cmd, unsigned long arg)
-{
- 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 struct i2c_algorithm i2c_sibyte_algo = {
- .smbus_xfer = smbus_xfer,
- .algo_control = algo_control, /* ioctl */
- .functionality = bit_func,
-};
-
-/*
- * registering functions to load algorithms at runtime
- */
-int i2c_sibyte_add_bus(struct i2c_adapter *i2c_adap, int speed)
-{
- int i;
- struct i2c_algo_sibyte_data *adap = i2c_adap->algo_data;
-
- /* register new adapter to i2c module... */
- i2c_adap->algo = &i2c_sibyte_algo;
-
- /* Set the frequency to 100 kHz */
- csr_out32(speed, SMB_CSR(adap,R_SMB_FREQ));
- csr_out32(0, SMB_CSR(adap,R_SMB_CONTROL));
-
- /* scan bus */
- if (bit_scan) {
- union i2c_smbus_data data;
- int rc;
- printk(KERN_INFO " i2c-algo-sibyte.o: scanning bus %s.\n",
- i2c_adap->name);
- for (i = 0x00; i < 0x7f; i++) {
- /* XXXKW is this a realistic probe? */
- rc = smbus_xfer(i2c_adap, i, 0, I2C_SMBUS_READ, 0,
- I2C_SMBUS_BYTE_DATA, &data);
- if (!rc) {
- printk("(%02x)",i);
- } else
- printk(".");
- }
- printk("\n");
- }
-
- return i2c_add_adapter(i2c_adap);
-}
-
-
-int i2c_sibyte_del_bus(struct i2c_adapter *adap)
-{
- int res;
-
- if ((res = i2c_del_adapter(adap)) < 0)
- return res;
-
- return 0;
-}
-
-int __init i2c_algo_sibyte_init (void)
-{
- printk("i2c-algo-sibyte.o: i2c SiByte algorithm module\n");
- return 0;
-}
-
-
-EXPORT_SYMBOL(i2c_sibyte_add_bus);
-EXPORT_SYMBOL(i2c_sibyte_del_bus);
-
-#ifdef MODULE
-MODULE_AUTHOR("Kip Walker, Broadcom Corp.");
-MODULE_DESCRIPTION("SiByte I2C-Bus algorithm");
-module_param(bit_scan, int, 0);
-MODULE_PARM_DESC(bit_scan, "Scan for active chips on the bus");
-MODULE_LICENSE("GPL");
-
-int init_module(void)
-{
- return i2c_algo_sibyte_init();
-}
-
-void cleanup_module(void)
-{
-}
-#endif
generated by cgit v1.2.3 (git 2.0.4) at 2024-12-28 17:09:59 +0000